Sports

Jack Rabbit

(45,984 posts) Tue Feb 7, 2012, 05:53 PM Feb 2012

Chess (February): Hou scores big achievement in Gibraltar; Aronian wins in Wijk; Aeroflot begins

The JR Chess Report theme music: Merrick, The Look Sharp, Be Sharp March (From a broadcast of The Gillette Cavalcade of Spots).

[center]

[/center]

[font size="4"]Short, Hou finish equal first in Gibraltar[/font]

[font size="1"]Photo of Mr. Short by http://commons.wikimedia.org/wiki/User:Stefan64 Stefan64 in http://commons.wikimedia.org/wiki/Nigel_Short Wikimedia Commons (http://creativecommons.org/licenses/by-sa/3.0/deed.en Creative Commons License], Attribution/Share Alike)[/font]
[font size="1"]Photo of Ms. Hou by karpidis http://www.flickr.com/photos/karpidis/ modified from flickr http://www.flickr.com/photos/8022405@N02/2750069891/ in Wikimedia Commons http://commons.wikimedia.org/wiki/Category:Hou_Yifan (Creative Commons License http://creativecommons.org/licenses/by-sa/2.0/deed.en , Attribution/Share Alike)[font size="1"]Photo by karpidis http://www.flickr.com/photos/karpidis/ modified from flickr http://www.flickr.com/photos/8022405@N02/2750069891/ in Wikimedia Commons http://commons.wikimedia.org/wiki/Category:Hou_Yifan (Creative Commons License http://creativecommons.org/licenses/by-sa/2.0/deed.en , Attribution/Share Alike)[/font][font size="2"]

British grandmaster and former world championship challenger Nigel Short defeeated 17-year-old Hou Yifan of China, the reigning world women's champion, in a two-game blitz playoff on the Rock Thursday, February 2, to win the tenth annual Tradewise Gibraltar Open after the pair finished equal first in the event with 8 points out of ten rounds.

For Mr. Short, it was another tournament victory in a long and distinguished career, which includes playing a match for the world championship against Garry Kasparov in 1993. For Ms. Hou's point of view, it was a landmark for women's chess.

Ms. Hou finished equal first in what is probably the second-strongest open tournament on the cess calendar for 2012, behind the Aeroflot Open which begins today in Moscow. This is the most prestigious first-place finish ever acheived by a woman in the history of organized competitive chess.

The legendary Judit Polgar of Hungary, still the top-ranked woman player of all time, won a category 16 tournament in Bali in 2000 and, later the same year, a strong four-player tournament in Malmö, Sweden.

In the course winning seven games against one loss and two draws, Ms. Hou defeated Ms. Polgar, currently rated 2710, in the seventh round. In addition, Ms. Hou, rated 2605 going into Gibraltar, took down Ms. Polgar's compatriot, Zoltan Almasi(2717) in round 3, Vietnamese GM and two-time champion of the Aeroflot Open Le Quang Liem (2714) in round 8 and the great attacking GM, Latvian Alexey Shirov (2710) in round 9. She drew her games against Britain's Mickey Adams (2724) and Shakhriya Mamedyarov (2747); her only defeat came in round 5 against Indian GM Krishnan Sasikiran (2700).

Ms. Hou's Elo score shot up 34 points as a result of her performance in Gibraltar, giving her a rating of 2639, the second highest rating ever achieved by a woman.

Hou Yifan turns 18 on February 27.[/font]

[font size="4"]Aronian wins Wijk aan Zee[/font]

[font size="1"]Photo by Frank Hoppe in http://commons.wikimedia.org/wiki/Category:Levon_Aronian Wikimedia Commons (Public Doamin)[/font]
[font size="2"]
Armenian GM Levon Aronian, the number two player in the world, won the elite group of the 74th Tata Steel Chess Tournament in the Dutch sea resort of Wijk aan Zee with 9 points out of a possible 13.

Paron Aronian finishes a full point ahead of the field. World's number one Magnus Carlsen (Norway), Teimour Radjabov (Azerbaijan) and Italian national champion Fabiano Caruana finished tied for second at 8 points each.

In Group B, Indian grandmaster Pantela Harikrishna took first place with 9 points and will play in group A next year. Alexander Motylev (Russia) and Lázaro Bruzón (Cuba) tied for second at 8½ points each.

In Group C, Russian grandmaster Maxim Turov took first place and a birth in next year's Group B competition with 10½ points, just a half point ahead of Swedish national champion Hans Tikkanen. Turov's wife, WGM Irina Turova, just gave birth to the couple's second child.
[/font]

[font size="4"]Aeroflot Open begins today[/font]

[font size="1"]Photo by http://www.flickr.com/photos/karpidis/ karpidis modified from http://www.flickr.com/photos/8022405@N02/2737655407/ flickr in http://commons.wikimedia.org/wiki/Category:Lê_Quang_Liêm Wikimedia Commons (http://creativecommons.org/licenses/by-sa/2.0/deed.en Creative Commons License, Attribution/Share Alike)[/font]
[font size="2"]
The eleventh annual Aeroflot Open Tournament begins today in Moscow.

Grandmaster Le Quang Liem of Vietnam, the fourth seed behind Evgeny Tomashevsky (Russia), Ian Nepomniachtchi (Russia) and Fabiano Caruana (Italy), is looking for his third straight Aeroflot Open championship. Le is the only person ever to win the Aeroflot mare than once.

In today's first round action, Tomashevsky drew with Alekej Aleksandrov of Belarus, Nepomniachtchi drew with Russian GM Pavel Ponkratov, Caruana defeated Russian GM Dmitry Bocharov and Le won against Russian GM Boris Savchenko.

Other grandmasters rated at or over 2700 participating in this year's Aeroflot are Paco Vallejo (Spain), former Aeorflot champion Baduur Jobava (Georgia) and Krishnan Sasikiran (India). Eighty-six players are participating in the main event.

21 replies

= new reply since forum marked as read

Highlight:

Chess (February): Hou scores big achievement in Gibraltar; Aronian wins in Wijk; Aeroflot begins (Original Post) Jack Rabbit Feb 2012 OP

January Games Jack Rabbit Feb 2012 #1

Tata Steel Chess Tournament, Wijk aan Zee Jack Rabbit Feb 2012 #2

Giri - Aronian (Group A), Round 10 Jack Rabbit Feb 2012 #3

Nyzhnyk - Harikrishna (Group B), Round 9 Jack Rabbit Feb 2012 #4

Haast - Turov (Group C), Round 4 Jack Rabbit Feb 2012 #5

Carlsen - Aronian, Group A, Round 3 Jack Rabbit Feb 2012 #6

Topalov - Caruana, Group A, Round 10 Jack Rabbit Feb 2012 #8

Gashimov - Radjabov, Group A, Round 11 Jack Rabbit Feb 2012 #9

Motylev - Tiviakov (Group B), Round 4 Jack Rabbit Feb 2012 #16

Tikkanen - Grover (Group C), Round 11 Jack Rabbit Feb 2012 #17

Ernst - Bruzón Batista (Group B), Round 13 Jack Rabbit Feb 2012 #18

54th Torneo di Capadanno, Reggio Emilia, Italy Jack Rabbit Feb 2012 #10

Nakamura - Giri, Round 9 Jack Rabbit Feb 2012 #13

Vitiugov - Nakamura, Round 1 Jack Rabbit Feb 2012 #19

Morozevich - Giri, Round 2 Jack Rabbit Feb 2012 #20

87th International Chess Congress, Hastings Jack Rabbit Feb 2012 #11

Wang Yue - A. Vovk, Round 8 Jack Rabbit Feb 2012 #14

Shyam - Edouard, Round 8 Jack Rabbit Feb 2012 #21

41st Rilton Cup, Stockholm Jack Rabbit Feb 2012 #12

Shimanov - Rozanthalis, Round 8 Jack Rabbit Feb 2012 #15

Thank you! madinmaryland Feb 2012 #7

Jack Rabbit

(45,984 posts)

1. January Games

Reply to Jack Rabbit (Original post)

Mon Feb 20, 2012, 12:42 AM

Feb 2012

Your humble hare acknowledges the assistance of Rybka 4 and Fritz 13 on analysis.

Diagrams on the Jack Rabbit Chess Report are made with Aquarium, a commercially available interface for Rybka.

Diagrams and other images are hosted on [link:http:imgur.com/|imgur].com.
[center]
BLACK

WHITE
White to move
(This position is a theoretical draw)
[/center]

I would like to thank my impressive and loyal staff: Buccaneer, Spitfire, Desperado, Swashbuckler, Pancho and Robin Hood.

Jack Rabbit

(45,984 posts)

2. Tata Steel Chess Tournament, Wijk aan Zee

Reply to Jack Rabbit (Reply #1)

Mon Feb 20, 2012, 12:47 AM

Feb 2012

[center][/center]

[center]Wijk aan Zee in Winter[/center]
[font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Arch Arch in http://en.wikipedia.org/wiki/File:Wijk_aan_zee_044.JPG Wikimedia Commons (Public Domain)
[/font]

Jack Rabbit

(45,984 posts)

3. Giri - Aronian (Group A), Round 10

Reply to Jack Rabbit (Reply #2)

Mon Feb 20, 2012, 12:49 AM

Feb 2012

Paron (Armenian, Mr.) Aronian, the world's second ranked chess player, closed the gap with the number one palyer by winning in Wijk aan Zee.

[center][/center]

[center]Levon Aronian[/center]
[font size="1"]Photo by Frank Hoppe in Wikimedia Commons (Public Domain)[/font]

http://www.chessgames.com/perl/chessgame?gid=1654443
Anish Giri - Levon Aronian
Tata Steel Chess Tournament (Group A), Round 10
Wijk aan Zee, 25 January 2012

Orthodox Queen's Gambit: London Opening

1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bf4 0-0 6.e3

If [font color="red"]6.a3 c5 7.dxc5 Bxc5[/font] then:

If [font color="red"]8.e3 Nc6 9.Qc2[/font] then:

If [font color="red"]9...Qa5[/font] then:

If [font color="red"]10.0-0-0 Be7[/font] then:

If [font color="red"]11.g4 dxc4 12.Bxc4 e5 13.g5 exf4 14.gxf6 Bxf6 15.Nd5 Ne7 16.Nxf6+ gxf6 17.Rhg1+ Kh8[/font] then:

If [font color="red"]18.Qe4 Ng6 19.Qd4 Qb6 20.Qxb6 axb6 21.Rd6[/font] then:

[font color="red"]21...fxe3 22.fxe3 Ra5 23.Kd2 Rf5 24.Rf1 Rc5 25.Bd3 Rc6 26.Rxc6 bxc6[/font] is equal (Kasparov-Khalifman, IT, Reggio Emilia, 1991).
If [font color="darkred"]21...Bh3 22.Kb1 Bf5+[/font] then:

[font color="darkred"]23.Ka1 Be4 24.Nd4 Ne5 25.Bb5 fxe3 26.fxe3 Rg8[/font] is equal (Gelfand-Jussupow, IT, Linares, 1993).
[font color="magenta"]23.Ka2 Be4 24.Nd4 Ne5 25.Bb3 fxe3 26.fxe3 Rg8[/font] is equal (Akopian-Kruppa, Op, St. Petersburg, 1993).

If [font color="darkred"]18.e4 b5 19.Bd5 Nxd5 20.exd5[/font] then:

If [font color="darkred"]20...b4 21.axb4 Qa1+ 22.Kd2 Qa6[/font] then:

If [font color="darkred"]23.Qc6 Rd8 24.Kc3 Bb7 25.Qxa6 Bxa6 26.Rd4 Rac8+ 27.Kd2 Bb7 28.Rc1 Rxc1 29.Kxc1 Kg7[/font] then:

[font color="darkred"]30.Nh4 Rxd5 31.Rxd5 Bxd5 32.Nf5+ Kf8[/font] is equal (Anand-Kramnik, Rpd, León, 2002).
[font color="purple"]30.Ne1 Rxd5 31.Rxd5 Bxd5 32.Nd3 f3 33.Kd2 Bc6[/font] is equal (van Wely-Short IT A, Wijk aan Zee, 1997).

[font color="darkorange"]23.Nd4 Rd8 24.b5 Qb6 25.Qe4 Bb7 26.Qxf4 Rxd5[/font] is equal (Akopian-Short, IT, Groningen, 1996).

[font color="magenta"]20...Bd7 21.Kb1 b4 22.Rd4 Rg8 23.Rxg8+ Rxg8 24.Qd2[/font] is equal (Kramnik-Karpov, IT, Monte Carlo, 1998).

If [font color="darkred"]11.h4 a6 12.Ng5[/font] then:

If [font color="darkred"]12...Rd8 13.cxd5 exd5[/font] then:

[font color="darkred"]14.e4! Nxe4 15.Ngxe4 dxe4 16.Rxd8+ Qxd8 17.Qxe4 g6[/font] is equal (Gelfand-Karpov, IT, Wijk aan Zee, 1998).
[font color="burgundy"]14.Kb1?! h6! 15.Nf3 Bg4 16.Be2 Rac8 17.Nd2 Bxe2 18.Nxe2 d4[/font] gives Black more freedom and more space (van Wely-Sharif, ZT, Linares, 1995).

If [font color="magenta"]12...dxc4 13.Bxc4[/font] then:

If [font color="magenta"]13...h6 14.Kb1[/font] then:

[font color="magenta"]14...Ne5 15.Bb3 Ng6 16.Nge4 Nxf4 17.exf4 Qc7[/font] draw (M. Gerevich-Barsov, Op, Brugge, 1995).
[font color="purple"]14...b5!? 15.Nce4! Nxe4 16.Qxe4 Bxg5 17.Bd3 f5 18.Qxc6[/font] gives White a strong initiative against the Black King position (Mamedyarov-Zatonskih, Op, Gibraltar, 2012).

[font color="darkorange"]13...Qc5?! 14.Nce4! Nxe4 15.Nxe4 Qa5 16.Ng5[/font] forces Black to weaken his King position (Kotanjian-Hammes, Euro Club Cup, Kallithea, Greece, 2008).

If [font color="darkred"]10.Rd1 Be7[/font] then:

If [font color="darkred"]11.Be2 dxc4 12.Bxc4 Nh5[/font] then:

If [font color="darkred"]13.0-0 Nxf4 14.exf4[/font] then:

[font color="darkred"]14...g6 15.g3 Rd8 16.Rxd8+ Qxd8 17.Rd1[/font] gives White a fair advantage in space (Kramnik-Carlsen, IT, Dortmund, 2009.
[font color="burgundy"]14...Rd8 15.Rxd8+ Qxd8 16.Rd1 Bd7 17.f5 Qc8 18.Qd3 Be8 19.fxe6 fxe6 20.Nd5[/font] gives White the advantage in space (A. Gupta-Kjartansson, Op, Reykjavik, 2009).

[font color="darkpink"]13.Bd6 Bxd6 14.Rxd6 Nf6 15.Qd2 Rd8 16.Rxd8+ Qxd8 17.Qxd8+ Nxd8 18.Ke2[/font] gives White the advantage in space (Eljanov-Chadaev, Russian ChT, Sochi, 2009).

If [font color="magenta"]11.Nd2 e5 12.Bg5 d4 13.Nb3[/font] then:

If [font color="magenta"]13...Qd8 14.Be2 a5 15.Na4[/font] then:

[font color="magenta"]15...g6 16.Bxf6 Bxf6 17.0-0 Qc7 18.c5 Be6 19.e4 Ne7 20.Nd2 Bg5[/font] is equal (Ftacnik-Kotronias, Ol, Thessaloniki, 1988).
If [font color="darkorange"]15...Ng4 16.Bxe7 Qxe7 17.exd4 Qh4[/font] then:

[font color="darkorange"]18.Bxg4 Bxg4 19.Rd2 exd4 20.0-0 Rad8 21.Nac5 d3 22.Qc3 Be2 23.Re1 a4 24.Nxa4 Rfe8[/font] gives Black more than enough extra space to comensate for his pawn minus (Jussupow-Korchnoi, IT, Tilburg, 1987).
[font color="purple"]18.g3 Qh3 19.Bf1 Qh5 20.Bg2 exd4 21.Nxd4 Re8+ 22.Kf1 Nxh2+ 23.Rxh2 Qxh2 24.Nxc6 Bh3[/font] White resigns as mate cannot be avoided (Puth-Döttling, Op, Bad Wörishofen, 2001).

If [font color="darkorange"]13...Qb6 14.Bxf6 Bxf6 15.Nd5 Qd8 16.Bd3[/font] then:

If [font color="darkorange"]16...g6 17.exd4[/font] then:

If [font color="darkorange"]17...Nxd4 18.Nxd4 exd4 19.Nxf6+ Qxf6 20.0-0[/font] then:

If [font color="darkorange"]20...Bg4 21.f3[/font] then:

If [font color="darkorange"]21...Be6[/font] then after [font color="darkorange"]22.f4 Bd7 23.Be4 Bc6 24.Bd5 Rfe8 25.Qd3 Bxd5 26.cxd5 Rac8 27.g3[/font] White will soon be a pawn to the good (Cu. Hansen-Jussupow, Op, Reykjavik, 1985).
[font color="burgundy"]21...Bd7 22.Rf2 Rfe8 23.Rfd2 Rad8 24.Be4 Bc6 25.Bxc6 bxc6[/font] gives Black a passed pawn and a small advantage in space (Tukmakov-Balashov, TT, Kislovodsk, 1982).

[font color="darkpink"]20...Bd7 21.b4 Rac8 22.Qb2 Rfd8 23.Rd2[/font] draw (Korchnoi-Schussler, IT, Haninge, Sweden, 1988).

If [font color="purple"]17...exd4 18.Nxf6+ Qxf6 19.0-0[/font] then:

If [font color="purple"]19...Rd8 20.Be4[/font] then:

[font color="purple"]20...Ne7 21.Rd2 Bf5 22.Rfd1 Qe5 23.f3 Rac8 24.Rxd4 Rxd4 25.Rxd4[/font] gives White a small advantage in space (Koneru-Grigoryan, Asian Ch, Hyderabad, India, 2005).
[font color="darkpink"]20...Bg4 21.f3 Be6 22.Nc5 Rac8 23.Nxb7[/font] gives White an extra pawn and the initiative; Black has a little more space (Savon-Geller, IT, Tiraspol, 1994).

[font color="hotpink"]19...Bg4 20.Rd2 Rac8 21.Be4 Rfd8 22.h3 Be6 23.Rfd1[/font] is equal (Nill-Melia, Euro Ch, Dresden, 2007).

[font color="burgundy"]16...h6 17.exd4 Nxd4 18.Nxd4 exd4 19.0-0 Be6 20.Bh7+ Kh8 21.Be4 Bxd5 22.Bxd5[/font] draw (Miles-D. Gurevich, IT, San Francisco, 1987).

If [font color="darkred"]9...dxc4?! 10.Bxc4[/font] then:

If [font color="darkred"]10...Qe7 11.Bg5 h6 12.Bh4[/font] then:

If [font color="darkred"]12...Bb6 13.Ne4 Ba5+ 14.b4[/font] then:

[font color="darkred"]14...g5 15.Nfxg5 Nxe4 16.Nxe4 Bxb4+ 17.axb4 Qxh4 18.b5[/font] gives White more activity for his pieces, stronger pawns and more space (Zhao Xue-Thao Nguyen Pham Le, Mindsports Rpd, Beijing, 2008).
[font color="burgundy"]14...Bc7 15.Nxf6+ gxf6 16.0-0 Rd8 17.Qe4 Rd7 18.Rad1[/font] gives White stronger pawns and more space.

If [font color="magenta"]12...a6 13.Ba2 Rd8 14.Ne4 g5 15.Nxc5 gxh4[/font] then:

If [font color="magenta"]16.Rc1 b6 17.Na4 Bb7 18.Nxb6[/font] gives White an extra pawn, stronger pawns and more space (Suba-Mirkovic, IT, Belgrade, 1984).
[font color="burgundy"]16.0-0 h3 17.Rfd1 b6 18.Na4 Rxd1+ 19.Rxd1[/font] gives White stronger pawns and more space.

[font color="darkorange"]10...a6 11.0-0 Bd7 12.Ba2 Rc8 13.Rad1[/font] gives White a comfortable advantage in space (Kosteniuk-Zatonskih, Mind Games RpdW, Beijing, 2011).
[font color="purple"]10...Bd7 11.Rd1 Rc8 12.Bd3 h6 13.h3 Qe7 14.0-0[/font] gives White the advantage in space (Rolland-Teichmann, SX, London, 1896).

[font color="darkorchid"]8.cxd5 Nxd5 9.Nxd5 exd5 10.Rc1 Bb6 11.e3 Nc6 12.Bd3 Bg4 13.h3 Bh5 14.0-0[/font] is equal (T. L. Petrosian-Rodgaard, Ol, Dresden 2008).

6...Nbd7 7.Be2 dxc4 8.0-0

If [font color="red"]8.Bxc4[/font] then:

If [font color="red"]8...c5 9.0-0 cxd4[/font] then:

If [font color="red"]10.exd4 Nb6[/font] then:

If [font color="red"]11.Bb3 Nbd5 12.Bg5[/font] then:

[font color="red"]12...b6 13.Bxf6 Nxf6 14.d5 exd5 15.Nxd5 Bc5 16.Qd3[/font] is equal (Radjabov-Wang Yue, IT, Nanjing, 2009).
[font color="burgundy"]12...Nxc3 13.bxc3 b6 14.Re1 Bb7 15.Qd3 Rc8 16.Ne5[/font] gives Black stronger pawns and White more space (Grachev-Azarov, Euro Club Cup, Plovdiv, 2010).

[font color="darkred"]11.Bd3 Nbd5[/font] then:

[font color="darkred"]12.Be5 Bd7 13.Rc1 Bc6 14.Re1 Bd6 15.Bb1 Bxe5 16.Nxe5[/font] gives White a small advantage in space, but he must defend an isolated d-pawn (Sasikiran-Kasiomdzhanov, Ol, Torino, 2006).
[font color="magenta"]12.Bg3 b6 13.Ne5 Bb7 14.Rc1 Rc8 15.Qe2 Nb4[/font] is equal (Janowski-Jaffe, Match, New York, 1916).

[font color="darkred"]10.Qxd4 Nb6[/font] then:

If [font color="darkred"]11.Be2 Qxd4 12.Nxd4 Nfd5 13.Nxd5 Nxd5[/font] then:

[font color="darkred"]14.Be5 Bd7 15.Bf3 Rfd8 16.Rac1 Rac8 17.h3[/font] is equal (Lautier-Vescovi, IT, Poikovsky, 2003).
[font color="darkorange"]14.Bg3 Bd7 15.Rfd1 Rfd8 16.e4 Nb4 17.a3 Nc6[/font] is equal (Yermolinsky-Lenderman, US Ch, St.Louis, 2010).

[font color="magenta"]11.Bb3 Qxd4 12.Nxd4 Bd7 13.Ndb5 Ne4 14.Nxe4 Bxb5[/font] is equal (Likavsky-Slobodjan, Bundesliga 0708, Germany, 2007).

[font color="darkred"]8...a6 9.a4 c5 10.0-0 cxd4[/font] then:

If [font color="darkred"]11.Qxd4 Nb6 12.Bb3 Qxd4 13.Nxd4 Bd7[/font] then:

If [font color="darkred"]14.a5 Nbd5 15.Nxd5 Nxd5[/font] then:

[font color="darkred"]16.Bxd5 exd5 17.Bc7 Bf6 18.Bb6 Rac8 19.Rfc1[/font] is equal (Dr.Hübner-Jussupow, IT, Wolvega, Holland, 2006).
[font color="burgundy"]16.Be5 Rac8 17.Rfd1 Rfd8 18.Nf5 exf5 19.Bxd5 Bc6[/font] is equal (Kempinski-Senff, Bundesliga 0304, Germany, 2004).

[font color="darkpink"]14.Rfd1 Rac8 15.Nf3 Rfd8 16.Bd6 Kf8 17.a5 Nc4[/font] is equal (Le Quang Liem-Laznicka, Op, Kolkata, 2009).

If [font color="magenta"]11.exd4 Nb6[/font] then:

If [font color="magenta"]12.Bb3 Bd7[/font] then:

If [font color="magenta"]13.Ne5 Bc6 14.Re1 Nbd5 15.Bg5[/font] then:

If [font color="magenta"]15...Qd6[/font] then:

[font color="magenta"]16.Qd3 Nb4 17.Qh3 Bd5 18.Nxd5 Nfxd5 19.Bd2[/font] is equal (Tregubov-Al Timimi, Op, Gibraltar, 2005).
[font color="burgundy"]16.Rc1 h6 17.Bd2 Rac8 18.Qe2 Nb4 19.Rcd1[/font] gives White a slight advantage in space.

[font color="hotpink"]15...h6 16.Bd2 Rc8 17.Rc1 Qb6 18.Bxd5 Nxd5 19.Nxd5 Bxd5[/font] is equal.

[font color="purple"]13.a5 Nbd5 14.Nxd5 Nxd5 15.Bxd5 exd5 16.Qb3 Bb5[/font] is equal (Potkin-Manuyan, Russian ChT, Oglinka, 2011).

[font color="darkorange"]12.Be2 Nbd5 13.Bg3 Bd7 14.Ne5 a5 15.Nxd7 Qxd7[/font] is equal (Zvjanginsev-Rustemov, Russian ChT, Sochi, 2004).

8...Nb6 (N)

If [font color="red"]8...c5 9.dxc5 Nxc5 10.Bxc4[/font] then:

If [font color="red"]10...a6[/font] then:

[font color="red"]11.a4 Qxd1 12.Rfxd1 Rd8 13.Ne5 Nh5 14.Rxd8+ Bxd8[/font] (I. Sokolov-Le Roux, French ChT, Mulhouse, 2011).
If [font color="darkred"]11.Ne5 Ncd7 12.Be2 Nxe5 13.Bxe5 Qa5[/font] then:

[font color="darkred"]14.Bg3 b5 15.Bf3 Ra7 16.a3[/font] is balanced (Aronian-Gelfand, Tal Mem, Moscow, 2011).
[font color="magenta"]14.Qd4 Rd8 15.Qf4 Ne8 16.Ne4 Rd5 17.Bc3[/font] gives White a fair advantage in space, but he can make use of the fifth rank.

If [font color="darkred"]10...Qxd1 11.Rfxd1 b6 12.Nd4 Bb7[/font] then:

[font color="darkred"]13.f3 Rfc8 14.Rac1 a6 15.a3 Nh5 16.Be5[/font] gives White a small advantage in space (Anand-Kramnik, IT, London, 2011).
[font color="magenta"]13.Rac1 a6 14.b4 Nce4 15.Nxe4 Bxe4 16.a3[/font] gives White a small advantage in space (Gelfand-Kramnik, Tal Mem, Moscow, 2011).

If [font color="blue"]8...Nd5 9.Bxc4 Nxf4 10.exf4[/font] then:

[font color="blue"]10...c5 11.dxc5 Qc7 12.g3 Qxc5 13.Qe2[/font] gives White a fair advantage in space (Aronian-Anand, Tal Mem, Moscow, 2011).
If [font color="darkblue"]10...c6 11.Re1 Nb6 12.Bd3 Nd5 13.g3 Qa5 14.Nxd5[/font] gives White a small advantage in space after Black recaptures with the c-pawn.

9.Qc2

The game is equal.
If [font color="red"]9.Ne5[/font] then:

[font color="red"]9...Bd6 10.Bg3 Bxe5 11.Bxe5 Bd7 12.b3 Nfd5 13.Qd2[/font] is equal.
[font color="darkred"]9...Nfd5!? 10.Bg3! Nxc3 11.bxc3 Qd5 12.a4 f6 13.a5[/font] gives White the initiative and a slight advantage in space.

9...Nh5

"A Knight at the rim is grim," as the chess adage goes. In this case, Black seems to be doing nothing more than driving away the Bishop. That is enough to justify the move.
More common is [font color="red"]9...Nfd5 10.Bg3 Nb4 11.Qd1 h5 12.h3 h4 13.Bh2[/font] with equality.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Anish Giri[/center]
[center]Position after 9...Nh5[/center]

10.Be5

This is also unusual, but the game is still equal. White avoids the exchange of minor pieces.
[font color="red"]10.Bg3 Nxg3 11.hxg3 Bd7 12.Ne5 Bd6 13.Nxc4 Nxc4 14.Bxc4[/font] is equal.

10...f6 11.Ng5 fxg5 12.Bxh5 Bd7

If [font color="red"]12...Bd6[/font] then:

[font color="red"]13.Bxd6 cxd6 14.Bf3 d5 15.e4 a5 16.Rae1 a4[/font] is equal.
[font color="darkred"]13.Rfd1 Qe7 14.Bxd6 cxd6 15.Bf3 d5 16.a4 a5[/font] is equal.

13.Bf3 Rxf3 14.gxf3 Bd6

[font color="red"]14...Bc6! 15.Qe2 Qd7 16.Rad1 Bb4 17.e4 Qf7 18.Rd2[/font] remains equal.

15.Qe4

If [font color="red"]15.Bxd6!? cxd6 16.Qe4[/font] then:

[font color="red"]16...Qf6 17.Qg4 d5 18.a4 a5 19.h3 Rf8 20.Kg2[/font] remains equal.
[font color="darkred"]16...Rb8!? 17.Qg4! e5 18.Qg3 exd4 19.exd4 Qf8 20.Rfe1[/font] gives White a small advantage in space.

15...Bc6 16.Qg4 Qe7 17.Bxd6

[font color="red"]17.Bg3 h6 18.Rac1 Rf8 19.Ne4 e5 20.dxe5 Bxe5[/font] remains equal.

17...cxd6 18.Ne4

[font color="red"]18.Qg3 h6 19.Rac1 Rc8 20.b3 d5 21.Rc2 Rf8[/font] remains equal.

18...h6

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Anish Giri[/center]
]center]Position after 18...h7h6[/center]

19.Qg3

If [font color="red"]19.b3 d5 20.Nc5 e5 21.Rac1[/font] then:

If [font color="red"]21...exd4 22.exd4 Nd7[/font] then:

[font color="red"]23.bxc4 dxc4 24.Nxd7 Qxd7 25.Rxc4 Qxg4+ 26.fxg4[/font] gives White the exchage, but Black's Bishop is as active as White's Rook.
[font color="magenta"]23.Rfe1!? Qf7! 24.Nxd7 Bxd7 25.Qg3 Bc6 26.Re5[/font] remains equal.

[font color="darkred"]21...Nd7!? 22.bxc4! Nxc5 23.dxc5 Bd7 24.Qg3 dxc4 25.Rfd1[/font] gives White a slight advantage with command of the d-file.

19...d5 20.Nc3

If [font color="red"]20.Nc5 Re8[/font] then:

[font color="red"]21.Rac1 Nc8 22.b3 Nd6 23.Qg4 e5 24.dxe5 Nf7[/font] remains equal
[font color="darkred"]21.Rfd1 Nc8 22.Rac1 Nd6 23.b3 Nf5 24.Qg4 Nh4[/font] gives Black a slight material edge.

20...Rf8 21.Ne2

[font color="red"]21.Rfe1 Qf7 22.Re2 Qxf3 23.Qxf3 Rxf3 24.Kg2 Rf8[/font] gives Black a small advantage with his Rook on an open file.

21...Rf5

[font color="red"]21...Qb4 22.Rab1 Na4 23.Qe5 Rf6 24.b3 Qd2 25.Ng3[/font] remains equal.

22.Kg2

If [font color="red"]22.Qb8+ Nc8![/font] then:

[font color="red"]23.a4 a5 24.Rfb1 Rxf3 25.Nf4 gxf4 26.Qxc8+ Qe8[/font] gives Black only one pawn for the exchange, but he also has a clear advantage in space.
If [font color="darkred"]23.Qxc8+? Rf8! 24.Qxf8+ Qxf8[/font] then:

If [font color="darkred"]25.Kg2 Be8[/font] then:

[font color="darkred"]26.Rfe1[/font] then after [font color="darkred"]26...Bh5 27.Ng1 b5 28.Re2 a5 29.Rd1 Qf5[/font] Black wins.
[font color="darkorange"]26.Ng3[/font] then Black wins after [font color="darkorange"]26...Qb4 27.Rab1 Bg6 28.e4 h5[/font]

[font color="magenta"]25.f4[/font] then Black wins after [font color="magenta"]25...gxf4 26.Nxf4 Qf5 27.Ng2 e5 28.Rfd1 Qg6[/font]

22...Nd7 23.Rh1?!

White takes his Rook out of play.
If [font color="red"]23.b3 e5 24.Kg1 Rf8 25.Rad1 b5 26.b4 Re8 27.a3 Kh7[/font] remains equal.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Anish Giri[/center]
[center]Position after 23.Rf1h1[/center]

23...Nf8!

Black has more freedom and a substantial advantage in space.

24.h4?

This is the logical follow up of White's previous move, but that still doesn't make it a good plan.
If [font color="red"]24.Rhf1 Ng6 25.Kh1 Qf7 26.Ng1 e5 27.Rad1 Kh7[/font] gives White command of the f-file, pressure on the foremost f-pawn and a tremendous advantage in space.

24...Ng6!

Black threatens to win a pawn.

25.f4

If [font color="red"]25.Kf1? Nxh4! 26.f4[/font] then Black wins after [font color="red"]Qb4 27.Rb1 Qd2 28.Rh3 e5 29.fxe5 Ba4.[/font]
If [font color="darkred"]26.Rd1[/font] then Black wins after [font color="darkred"]26...Rxf3 27.Qe5 Be8 28.b3 b5 29.bxc4 bxc4.[/font]

25...Nxh4+

White has two extra pawns.

26.Kf1 Qb4 27.Rb1

[font color="red"]27.Rc1 Qxb2 28.fxg5 hxg5 29.Qd6 Rf6 30.Qd8+ Kf7[/font] gives Black three extra pawns.

27...Be8?!

Black throws away much of his advantage.
Black wins after [font color="red"]27...Ba4! 28.b3 cxb3 29.axb3 Bb5 30.Re1 Bd3.[/font]

28.Nc3

Good, but better is [font color="red"]28.fxg5 hxg5 29.Nc3 Bh5 30.Rh2 Qb6 31.Rh1 Qd8[/font] when White is badly cramped on the kingside; the Queen has no way to move forward.

28...Qe7?!

Black fails to find the riht continuation.
If [font color="red"]28...Bh5! 29.fxg5 hxg5 30.Rh3 Qf8 31.f4 Qf7[/font] gives Black a Bishop and two pawns for a Rook.
If [font color="blue"]28...Rf6![/font] then:

[font color="blue"]29.fxg5 hxg5 30.Qxg5 Nf3 31.Nxd5 exd5 32.Qxd5+ Rf7[/font] gives Black two minor pieces for a Rook and a pawn and more space.
If [font color="darkblue"]29.a3?[/font] then Black wins after [font color="darkblue"]29...Qd6! 30.Qg4 Bg6 31.Rd1 Bf5 32.Qe2 Qb6.[/font]

29.b4?

White simply allows Black to enjoy a second passer.
[font color="red"]29.Rh3! Rf8 30.fxg5 hxg5 31.Kg1 b5 32.f4 b4[/font] still gives Black a strong advantage in space.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Anish Giri[/center]
[center]Position after 29.b2b4[/center]

29...Rf8!

Also good is [font color="red"]29...Bh5![/font] then:

If [font color="red"]30.fxg5 hxg5 31.Kg1 Rf8[/font] then:

[font color="red"]32.Rh3 Nf3+ 33.Kg2 g6 34.a3 Qf6 35.Rbh1 Qf7[/font] Black's concentration of pawer on the kingside triumphs.
If [font color="magenta"]32.Rb2[/font] then Black wins after [font color="magenta"]32...Qf7 33.f4 Nf3+ 34.Kg2 gxf4 35.exf4 Nxd4.[/font]

If [font color="darkred"]30.Rb2[/font] then Black wins after [font color="darkred"]30...Rf8 31.fxg5 hxg5 32.Qe5 Nf3 33.Qg3 Qf7.[/font]

30.Rb2

[font color="red"]30.fxg5 hxg5 31.Rb2 Qf6 32.Qe5 Qg6 33.e4 Rf3[/font] gives Black pressure on the f-pawn and the intiative against the Knight.

30...Bg6?!

While this still leaves Black with excellent winning chances, it also opens the door for White to fight back.
If [font color="red"]30...Nf5! 31.Qh2 a5[/font] then:

[font color="red"]32.a3 axb4 33.axb4 h5 34.Rg1 g4 35.Ke2 Nh4[/font] Black wins.
If [font color="darkred"]32.bxa5[/font] then Black wins after [font color="darkred"]32...Qa3 33.Rc2 Bg6 34.Qh3 gxf4 35.exf4 Nxd4.[/font]

31.Ke1!?

The King runs the wrong way.
[font color="red"]31.fxg5! Qxg5 32.Qxg5 Bd3+ 33.Kg1 Nf3+ 34.Kg2 Nxg5[/font] gives Black a passed pawn and a great deal more space, but the passer doesn't have a bright future with the White King joining in the defense and everything else is locked.

31...Bd3!?

Black still has a significant advantage in space, but he has to re-win the game.
If [font color="red"]31...Qf7! 32.Rd2 Qf5[/font] (Black has a firm grip on the h7/b1 diagonal) then:

[font color="red"]33.Rxh4 gxh4 34.Qxh4 Bh5 35.Qh1 Rf6 36.f3 a6[/font] gives White a passed h-pawn, command of the f-file and a significant advantage in space.
If [font color="darkred"]33.Rf1?[/font] then Black wins after [font color="darkred"]33...Bh5 34.f3 g6 35.a4 gxf4!! 36.Qxh4 fxe3 37.Re2 Qd3[/font] when Black has three pawns for the sacrificed piece, a pawn on the sixth rank and a Queen acting as a bone in White's throat.

32.fxg5! Nf3+ 33.Kd1 hxg5!?

Black voluntarily removes his passed pawn from the h-file.
[font color="red"]33...Qxg5! 34.Qxg5 Nxg5 35.b5 b6 36.a4 Ne4 37.Nxe4 Bxe4[/font] gives Black a passed pawn on the h-file with the White King unable to reach that part of the field (unlike the situation in the note to White's 31st move).

34.Qh3!

White has counterplay in the h-file.

34...Qf6 35.Kc1

The King strays yet further from where he's needed.
No better is [font color="red"]35.Qh8+ Kf7 36.Qh5+ Bg6 37.Qg4 Kg8 38.Kc1 Rd8[/font] when Black still has a significant advantage in space.

35...Bg6

Better is [font color="red"]35...Rd8! 36.Nb5 Kf7 37.Qh5+ Bg6 38.Qg4 a6[/font] when Black has excellent winning chances.

36.a4?

White is out of time; Black launches the attack.
If [font color="red"]36.Na4 b6 37.Nc3 Rd8[/font] then:

[font color="red"]38.Ne2 e5 39.b5 exd4 40.Nxd4 g4 41.Qxg4 Ne5[/font] and after White moves the Quuen, the Knight checks on d3.
If [font color="darkred"]38.a3 e5 39.Ne2 c3[/font] then:

[font color="darkred"]40.Rb3 exd4 41.exd4 Bd3 42.Qh8+ Kf7 43.Qh5+ Kf8[/font] gives Black a passed pawn at c3, a Bishop and two pawns for a Rook, command of the h7/b1 diagonal and the f-file.
If [font color="magenta"]40.Nxc3 exd4 41.Ne2[/font] then:

[font color="magenta"]41...g4 42.Qxg4 dxe3 43.fxe3 Ne5 44.Qd4 Rc8+[/font] gives Black an extra piece.
[font color="darkorange"]41...Ne5 42.Rd2 g4 43.Qh4 Rc8+ 44.Kd1 Qf5[/font] is resignable.

White's only narrow path to avoid a completely lost game is [font color="blue"]36.b5! Qe7 37.Qh8+ Kf7 38.Qh3 Nh4[/font] when:

[font color="blue"]39.b6 a6 40.Qg3 Kg8 41.Qc7 Qa3 42.Nb1 Qa5[/font] the Queen and b-pawn provide White with counterplay for the moment.
If [font color="darkblue"]39.Rg1?[/font] then Black wins after [font color="darkblue"]39...Kg8 40.Qg3 Nf3 41.Rh1 e5 42.Nxd5 Qd7.[/font]

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Anish Giri[/center]
[center]Position after 36.a2a4[/center]

36...Rd8!

Black prepares to advance i the center.
The immediate [font color="red"]36...e5?[/font] proves premature after [font color="red"]37.Qd7! Qc6 38.Qxc6 bxc6 39.b5! exd4 40.exd4[/font] when Black at best has two pawns for the exchange and a comfortable advantage in space.

37.Ne2 e5 38.Qg4

Better is [font color="red"]38.a5 Be4 39.Rd1 Qc6 40.Nc3 exd4 41.exd4,[/font] but not good enough to change the outcome.

38...exd4 39.exd4 Re8 40.Qd7 c3 41.Ra2

If [font color="red"]41.Rc2 Rd8[/font] then:

[font color="red"]42.Qh3 Bxc2 43.Kxc2 Re8 44.Qh7+ Kf8 45.Nxc3 Nxd4+.[/font]
If [font color="darkred"]42.Qc7[/font] the Black wins easily after [font color="darkred"]42...Bxc2 43.Kxc2 Re8 44.Nxc3 Nxd4+ 45.Kd3 Qxf2.[/font]

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Anish Giri[/center]
[center]Position after 41.Rb2a2[/center]

41...Ne1!!

White gives back the extra piece in order to accelerate the attack.
The text wins quicker than [font color="red"]41...Nxd4 42.Qxd5+ Ne6 43.Qc4 c2 44.Ra3 Rd8.[/font]

42.Rxe1

There is no adequate reply to Black's last move.
If [font color="red"]42.Ra3 Nd3+ 43.Kb1 Nc5+[/font] wins the Queen.

42...Qf4+

Also good is [font color="red"]42...Qxf2! 43.Kd1 Qf3 44.Qb5 Rc8.[/font]

43.Kd1 Qe4 0-1

White has no stomach to go any further with something like [font color="red"]44.Qxe8+ Bxe8 45.Nxc3 Bh5+.[/font]
Mh. Giri resigns.

Jack Rabbit

(45,984 posts)

4. Nyzhnyk - Harikrishna (Group B), Round 9

Reply to Jack Rabbit (Reply #2)

Mon Feb 20, 2012, 12:51 AM

Feb 2012

[center]

Pentala Harikrishna
[/center][font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Samson1964 Frank Hoppe] in http://commons.wikimedia.org/wiki/Category entala_Harikrishna Wikimedia Commons (Public Domain)
[/font]

Illya Nyzhnyk - Pentala Harikrishna [D53]
Tata Steel Chess Tounament (Group B), Round 9
Wijk aan Zee, 24 January 2012

Orthodox Queen's Gambit: Trompowsky-Torre Opening/Lasker Defense

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 0-0 7.Rc1 Ne4 8.Bxe7 Qxe7 9.g3

For a more complete look at the Lasker Defense, see Topalov-Anand, IT, Nanjing, 2010.

9...Qb4 (N)

[font color="red"]9...Nxc3 10.Rxc3 c6 11.Bg2 Nd7 12.0-0[/font] gives White a slight advantage in space (Kramnik-Radjabov, Candidates' Matches, 2011).

10.Qc2

The game is equal..

10...Qxc4

If [font color="red"]10...Nc6!? 11.e3[/font] then:

[font color="red"]11...Qa5 12.Qa4 Qxa4 13.Nxa4 Rd8 14.cxd5 exd5 15.Nd2[/font] gives White a small advantage in space.
If [font color="darkred"]11...Qe7 12.Be2[/font] then:

[font color="darkred"]12...Nxc3 13.Qxc3 a5 14.0-0 Bd7 15.Rfd1 a4 16.a3[/font] gives White a strong off-center duo.
[font color="magenta"]12...Nf6 13.Qb3 Rd8 14.0-0 dxc4 15.Qxc4 e5 16.d5[/font] gives White the initiative and a slight advantage ins space.

11.Nxe4 Qxc2 12.Rxc2 dxe4

The game remains equal.

13.Nd2

[font color="red"]13.Ne5!? f6! 14.Ng6 Rf7 15.Bg2 Nc6 16.Rc4 f5[/font] gives Black a small advantage in space.

13...e5 14.Nxe4 exd4 15.Rxc7 Na6

The game remains equal
[font color="red"]15...a5 16.Rc1 Nc6 17.Bg2 a4 18.Kd2 Be6 19.Nd6[/font] is also level.

16.Rc1 Bd7 17.Bg2

If [font color="red"]17.Nd6 Bc6 18.e4[/font] then:

[font color="red"]18...d3 19.Rc4 Rad8 20.Nf5 Rfe8 21.f3 Bd5 22.Rc3[/font] remains equal.
[font color="darkred"]18...dxe3?! 19.Rxc6! bxc6 20.Bxa6 Rab8 21.Nc4[/font] gives White two minor pieces against Black's Rook and extra pawn.

17...Bc6 18.Rg1 Rfe8

[font color="red"]18...Rad8[/font] is probably more precise, but the game still reamins level after [font color="red"]19.Kd1 d3 20.e3 Rfe8 21.Nc3 Bxg2 22.Rxg2.[/font]

19.Nc5 Bb5 20.Bxb7 Rxe2+ 21.Kd1?!

Although it seems counterintutive, the correct thing to do here is play 21.Kf1. The King will have check discovered on him at f1, but he will then have a safe haven at g2.
If [font color="red"]21.Kf1![/font] then:

If [font color="red"]21...Re6+ 22.Kg2 Bc6+ 23.Bxc6 Rxc6[/font] then:

[font color="red"]24.Nd3 Rac8 25.Rxc6 Rxc6 26.Re1 Kf8 27.Re5[/font] gives White a comfortable advantage in space.
[font color="burgundy"]24.Nb3?! Rxc1 25.Rxc1 Nb4 26.Nxd4 Nxa2 27.Rc5[/font] gives White only a small advantage in space.

If [font color="darkred"]21...Nxc5?! 22.Rxc5![/font] then:

[font color="darkred"]22...Bd3 23.Bxa8 Rc2+ 24.Kg2 Rxc5 25.Rd1 Bc4 26.b3[/font] wins a pawn for White.
[font color="magenta"]22...Rxb2+? 23.Rxb5! Rxb5 24.Bxa8[/font] leaves Black a piece to the good.

[center]
BLACK: Pentala Harikrishna[/center]

[center][/center]

[center]WHITE: Illya Nyzhnyk[/center]
[center]Position after 21.Ke1d1[/center]

21...Rb8!!

Black sacrifices a piece.

22.Bxa6

[font color="red"]22.Bc6?[/font] loses to [font color="red"]22...Nxc5! 23.Bxb5 Rxb2! 24.Rxc5 Rb1+ 25.Rc1 R8xb5[/font] when Black has an extra pawn.

22...Bxa6 23.Nxa6 Rbxb2

Black has only a pawn for the Knight, but two Rooks on the seventh rank make it all worthwhile.

24.Rc8+ Kh7 25.Nb4?

White can not afford any misstep. Although the Knight makes Black's manuevering on the short side more difficult, White's King must stay in touch with the Rook on the long side in order to prevent mate.
Correct is [font color="red"]25.a4 Rxf2[/font] then:

[font color="red"]26.Rb8 Ra2 27.Rb1 Rxh2 28.Nc5 f5[/font] White's Rooks heep the King defended at least for the time being, while the Knight can be used to block or capture the d-pawn.
If [font color="darkred"]26.Rc1?[/font] then Black wins after [font color="darkred"]26...Rfd2+! 27.Ke1 Re2+ 28.Kf1 d3 29.Ra1 Ra2.[/font]

If [font color="blue"]25.Rb8[/font] then Black wins after [font color="blue"]25...Rbd2+ 26.Kc1 Rxa2 27.Nc5 Rac2+ 28.Kd1.[/font]

[center]
BLACK: Pentala Harikrishna[/center]

[center][/center]

[center]
WHITE: Illya Nyzhnyk[/center]
[center]Position after 25.Na6b4[/center]

25...Rxf2!

White threatens mate on b1.

26.a3

This is the best defense, for what it's worth.
If [font color="red"]26.Ke1[/font] then Black wins after [font color="red"]26...Rxh2 27.Nd3 Rbe2+ 28.Kf1 Rd2 29.Rd8 Rxd3.[/font]

26...a5 27.Nd5 Ra2! 28.Re1

If [font color="red"]28.Rc1[/font] then Black wins after [font color="red"]28...Rxh2! 29.Rb1 Rxa3 30.Kc1 d3 31.Kd1 a4.[/font]

[center]BLACK: Pentala Harikrishna[/center]

[center][/center]

[center]
WHITE: Illya Nyzhnyk[/center]
[center]Position after Position after 28.Rg1e1[/center]

28...d3! 0-1

The text is crushing. White cannot move his King (29.Kc1 Ra1#) and his Rook is subject to attack from 30.d2!
Illya Igorovich resigns.

Jack Rabbit

(45,984 posts)

5. Haast - Turov (Group C), Round 4

Reply to Jack Rabbit (Reply #2)

Mon Feb 20, 2012, 12:53 AM

Feb 2012

[center]

There is no photo of Maxim Turov available with an internet-friendly copyright
[/center][font size="1"]Photo by Jon Sullivan from public-domain-photos.com (Public Domain)
[/font]

Anne Haast - Maxim Turov
http://www.chessgames.com/perl/chessgame?gid=1653951
Tata Steel Chess Tournament (Group C), Round 4
Wijk aan Zee, 17 January 2012

Caro-Kann Exchange Game: Panov Opening (Main Line)

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center]
[center]Caro-Kann Exchange Game: Panov Opening[/center]
[center]Position after 4.c2c4[/center]

4...Nf6 5.Nc3 Nc6

[font color="red"](Semi-Slav Defense)[/font] If [font color="red"]5...e6 6.Nf3 Bb4[/font] then:

If [font color="red"]7.cxd5 Nxd5[/font] then:

If [font color="red"]8.Qc2 Nc6[/font] then:

If [font color="red"]9.Bd3[/font] then:

If [font color="red"]9...h6 10.0-0 0-0 11.a3[/font] then:

If [font color="red"]11...Bd6 12.Qe2 Nce7[/font] then:

If [font color="red"]13.Re1 Nf6 14.Bd2 Nf5 15.Rad1[/font] gives White a small advantage in space (Shadrina-Mrktchian, Euro ChW, St. Petersburg, 2009).
[font color="burgundy"]13.Ne5 Nf5 14.Rd1 Nxd4 15.Qe4 Nf5 16.Nxd5 exd5 17.Qxd5 Bc7 18.Qxd8 Rxd8 19.Bf4 Re8[/font] is equal (Bologan-Epishin, Bundesliga 9899, Germany, 1999).

If [font color="darkred"]11...Be7 12.Rd1 Bf6 13.Be4 Qd6 14.Qe2 Rd8 15.Bc2 Nxc3 16.bxc3 Ne7 17.Ne5[/font] gives White the advantage in space (Ghaem Maghami-Wang Yue, Mindsports Rapid, Beijing, 2008).
If [font color="darkred"]9...Ba5 10.a3[/font] then:

If [font color="darkred"]10...Nxc3 11.bxc3 Nxd4 12.Nxd4 Qxd4 13.Bb5+ Bd7 14.0-0[/font] then:

If [font color="darkred"]14...Qd5 15.c4 Qf5 16.Bxd7+ Kxd7[/font] then:

If [font color="darkred"]17.Qb3 b6[/font] then:

If [font color="darkred"]18.Rd1+ Ke7 19.a4 Rhd8 20.Ba3+ Kf6 21.Bd6 g5 22.Qb2+ Kg6 23.Ra3[/font] then:

If [font color="darkred"]23...e5 24.Qe2 f6[/font] then:

[font color="darkred"]25.h4 g4 26.Rg3 h5 27.f3 Qf4 28.Kh2 Rac8 29.fxg4 Rxc4 30.Bxe5 Qxe5 31.gxh5+[/font] Black resigns (Napomniachtchi-Sulashvili, Euro Ch, Plovdiv, 2008).
If [font color="magenta"]23...g4?! 24.h3 h5 25.Rg3[/font] then:

If [font color="magenta"]25...f6?[/font] then White wins after [font color="magenta"]26.hxg4 hxg4 27.Rd4 Kf7 28.c5 Rg8 29.Rf4[/font] when the Black Queen will soon be forced to abandon the f-pawn (Tkachiev-Potkin, Euro Ch, Dresden, 2007).
Better is [font color="darkorange"]25...Be1 26.hxg4 hxg4 27.Rd4 Bxf2+,[/font] but that may not be enough to save the game.

[font color="burgundy"]25.Rad3 Rac8 26.Rd5 Re8 27.g4 Qf4 28.Qd3+ Kg7[/font] is equal (Nepomniachtchi-Rodshtein, Aeroflot Op, Moscow, 2008).

If [font color="magenta"]17.Qb2 b6[/font] then:

[font color="magenta"]18.Rd1+ Ke7 19.Be3 f6 20.c5 Rhd8 21.h3 Kf7[/font] give Black an extra pawn and more space (Topalov-Tukmakov, PCA Qual, Groningen, 1993).
[font color="darkorange"]18.c5 Ke7 19.cxb6 axb6 20.Be3 Rhd8[/font] gives Black an extra pawn, but White has active counterplay (Aronian-Asian, Armenian Ch, Yerevan. 2001).

[font color="purple"]18.Bb2 Ke7 19.Qg3 Rhd8 20.Rad1 Bd2 21.a4 Bf4[/font] gives Black the initiative (N. Kosintseva-Javakhishvili, OlW, Palma de Mallorca, 2004).
If [font color="magenta"]14...Qe5 15.Bxd7+ Kxd7[/font] then:

If [font color="magenta"]16.Qa4+ Ke7 17.Rb1 b6 18.Bf4[/font] then:

[font color="magenta"]18...Qc5 19.Rb5 Qc8 20.Rg5 g6 21.Rg3 f6[/font] is equal (Ghaem Maghami-Karpov, Rpd, Tehran, 2009).
[font color="purple"]18...Qf5 19.Rb5 Qg6 20.Rg5 Qf6 21.Rg3[/font] is equal (Nebolsina-Khotenashvili, World Jr ChG, Yerevan, 2007).

[font color="darkorange"]16.Rb1 Bb6 17.Be3 Qc7 18.Qa4+ Ke7 19.Qb4+[/font] gives White a small advantage with the Black King in the center and unable to castle (Barendse-Strating, IT Reserve, Wijk aan Zee, 2000).

If [font color="magenta"]10...h6 11.0-0 0-0[/font] then:

If [font color="magenta"]12.Rd1 Nce7[/font] then:

If [font color="magenta"]13.Ne5 Bd7 14.Ne4 Bc7 15.Qe2[/font] then:

[font color="magenta"]15...Nf5 16.Nc5 Bc6 17.Nxc6 bxc6 18.Nxe6 fxe6 19.Qxe6+[/font] gives White more activity in compensation for a material deficit (Nepomniachtchi-Kharitonov, Euro Ch, 2008).
[font color="hotpink"]15...Ba4 16.Re1 Nf5 17.Nc5 Nxd4 18.Qg4 Nf6 19.Qg3[/font] is equal (Andreikin-Dreev, Op, Baku, 2011).

[font color="purple"]13.Ne4 Bc7 14.Ng3 Nf6 15.Ne5 Bd7 16.Ne4[/font] is equal (Thorhallsson-Rasmussen, Euro ChT, Crete, 2007).

[font color="darkorange"]12.Be3 Nce7 13.Nxd5 Nxd5 14.Bh7+ Kh8 15.Be4 Bd7[/font] gives White command of the open file and the b1/h7 diagonal and more space; Black has better pawns (Adams-Ivanchuk, IT A, Wijk aan Zee, 2009).

If [font color="darkred"]9.Be2 0-0 10.0-0 Be7 11.Rd1 Bf6 12.Ne4[/font] then:

If [font color="darkred"]12...h6 13.Bc4[/font] then:

[font color="darkred"]13...Bd7 14.Qe2 Rc8 15.b3 Rc7 16.Bb2 Be7 17.Rac1[/font] gives White a slight advantage in space (Oll-Adianto, Keres Mem, Tallinn, 1998).
[font color="darkorange"]13...b6 14.Nxf6+ Qxf6 15.Bd2 Rd8 16.Qe4 Nce7 17.Ne5[/font] gives White a small advantage in space (Sykora-Shapiro, Corres, 2002).

[font color="magenta"]12...Re8 13.Re1 Bd7 14.Qd3 g6 15.h4 h5[/font] is equal (T. Kosintseva-Ushenina, Europ ChW, Chisinau, 2005).

If [font color="darkred"]8.Bd2 Nc6 9.Bd3 0-0 10.0-0 Be7[/font] then:

If [font color="darkred"]11.a3 Bf6 12.Qc2 h6 13.Be3[/font] then:

If [font color="darkred"]13...Nxc3 14.bxc3 e5[/font] then:

[font color="darkred"]15.Rad1 exd4 16.cxd4 Bg4 17.Be4 Rc8 18.Qb1[/font] is equal (Moiseenko-And. Volokitin, Russian ChT, Sochi, 2005).
[font color="burgundy"]15.Bh7+ Kh8 16.Be4 exd4 17.cxd4 Bg4 18.Bxc6 Rc8 19.Qe4[/font] is equal (Angel Dianni-Linna, Corres, 1999).

[font color="magenta"]13...Nce7 14.Bh7+ Kh8 15.Be4[/font] then:

[font color="magenta"]15...Bd7 16.Bxd5 Nxd5 17.Nxd5 exd5 18.Ne5 Be6 19.Qd2[/font] is equal (Nevednichy-Rianzantsev, Euro Ch, Dresden, 2007).
[font color="darkorange"]15...Nxe3 16.fxe3 Nf5 17.Qf2 g6 18.g4 Nd6 19.Ne5[/font] gives White a small advantage in space (Sveshnikov-Zakharstov, Russian Ch, Elista, 2001).

[font color="magenta"]a) 11.Qe2 Nf6 12.Ne4[/font] then:

If [font color="magenta"]12...Qb6 13.a3 Bd7[/font] then:

If [font color="magenta"]14.Rfd1 Rad8 15.b4[/font] then:

[font color="magenta"]15...a6?! 16.Nc5 Bc8 17.Bg5 h6 18.Be3 Nd5 19.Rac1[/font] gives White a healthy advantage in space (Murariu-Svetushkin, Op, Bucharest, 2001).
[font color="darkpink"]15...Bc8? 16.Nc5 Nxd4 17.Nxd4 Rxd4 18.Be3 Rd5 19.Nd7![/font] wins at least the exchange (Ghaem Maghami-Adianto, Mindsports Rpd, Beijing, 2008).
[font color="burgundy"]15...Nxe4! 16.Bxe4 f5 17.Bxc6 Qxc6 18.Rac1 Qe4[/font] remains equal.

If [font color="darkorange"]14.Be3 Nd5 15.b4[/font] then:

If [font color="darkorange"]15...a6!? 16.Nc5 Rfd8 17.h4 Bf6 18.Rac1 Nce7[/font] then:

If [font color="darkorange"]19.Ng5?! Bxg5[/font] then:

[font color="darkorange"]20.Nxd7 Rxd7 21.hxg5 Ng6[/font] is equal (Del Rio Angelis-Baumann, European Club Cup, Halidiki, 2002).
[font color="burgundy"]20.Bxg5 Bb5 21.Rfd1 h6 22.Bxe7 Nxe7 23.Qg4[/font] is equal.

[font color="hotpink"]19.g4 g6 20.h5 Bb5 21.h6 Nc6 22.g5[/font] continues to give White a fair advantage in space.

[font color="purple"]15...g6 16.Rfc1 a6 17.Rab1 Na7 18.Ne5[/font] gives White activity and freedom (van den Doel-Fontaine, Op, Brussels, 2000).

If [font color="darkorange"]12...Bd7[/font] then:

[font color="darkorange"]13.Rad1!? Nd5 14.Bb1 Qb6 15.Bg5 Rad8 16.Nc3 g6[/font] is equal (Ragger-Harikrishna, Bundesliga 0809, Baden-Baden, 2009).
[font color="purple"]13.Rac1 Rc8 14.Nxf6+ Bxf6 15.Qe4[/font] gives White a better center and a small advantage in space.

If [font color="magenta"]b) 11.Re1[/font] then:

If [font color="magenta"]11...Nf6 12.Bg5[/font] then:

If [font color="magenta"]12...b6 13.a3 Bb7 14.Bc2[/font] then:

If [font color="magenta"]14...Rc8 15.Qd3 g6 16.Rad1 Nd5 17.Bh6 Re8[/font] then:

If [font color="magenta"]18.Ba4[/font] then:

If [font color="magenta"]18...a6 19.Nxd5 Qxd5[/font] then:

[font color="magenta"]20.Qe3 Bf6 21.Bb3 Qd7 22.d5 exd5 23.Qxb6[/font] gives White stronger pawns and a small advantage in space (Beliavsky-Karpov, TRUD League, Soviet Union, 1986).
If [font color="darkorange"]18...Bf8[/font] then:

[font color="darkorange"]19.Bg5 Be7 20.h4 a6 21.Nxd5 exd5 22.Bxc6 Rxc6 23.Bxe7 Rxe7 24.h5[/font] gives White a small advantage in space (Mortensen-Ostenstad, ZT, Espoo, Finland, 1989).
[font color="purple"]19.Qd2 Bg7 20.Ne4 Rf8 21.Ne5 f6 22.Bxg7 Kxg7[/font] is equal (Gaponenko-Charkhalashvili, Euro ChW, Rijeka, 2010).

If [font color="darkorange"]20.Bb3!? Qh5![/font] then:

[font color="darkorange"]21.Qe3?! Na5 22.Bf4 Bxf3 23.gxf3 Nxb3 24.Qxb3 Qf5[/font] gives Black stronger pawns and command of the c-file (Als. Maric-Ciuksyte, OlW, Palma de Mallorca, 2004).
[font color="purple"]21.Bf4 g5 22.Bg3 g4 23.Ne5 Nxe5 24.dxe5[/font] remains equal.

If [font color="darkorange"]14...Nd5 15.Qd3 g6[/font] then:

If [font color="darkorange"]16.Bh6 Re8[/font] then:

If [font color="darkorange"]17.Rad1 Nxc3 18.bxc3[/font] then:

If [font color="darkorange"]18...Qd5 19.c4 Qh5 20.Bc1 Bf6[/font] then:

[font color="darkorange"]21.h3 Rad8 22.d5 exd5 23.Rxe8+ Rxe8 24.cxd5[/font] gives White a passed pawn and the initiative (Larsen-Najdorf, IT, Palma de Mallorca, 1969).
[font color="darkpink"]18.h4 Nxc3 19.bxc3 Na5 20.Ba4 Bc6 21.Bxc6 Rxc6 22.Ne5[/font] gives White a small advantage in space (Roiz-Döttling, Op, Tel Aviv, 2001).

If [font color="hotpink"]18...Bxa3!? 19.Ng5![/font] then:

[font color="hotpink"]19...Be7?! 20.Nxf7! Kxf7 21.Rxe6 Bf6 22.Rxe8 Kxe8 23.Qc4[/font] gives White an extra pawn, more activity and more space(Potkin-Galkin, Russian ChT, Sochi, 2004).
[font color="purple"]19...Na5 20.Qh3 Qf6 21.Ba4 Red8 22.Rd3[/font] continues to give White a small adcantage in space, but Black has connected passers on the queenside.

[font color="hotpink"]17.Ba4 Nxc3 18.bxc3 Qd6 19.h4 Rec8 20.h5[/font] is equal (Ostenstad-Scenkic, Euro Club Cup, Reythemnon, 2003).

[font color="burgundy"]21.Qe3 Kg7 22.Be4 Rab8 23.Bb2 Na5 24.Qc1[/font] gives Black stronger pawns and White a sllight advantage in space (Yemelin-Galkin, Russian Ch, Tomsk, 2006).

[font color="purple"]16.h4 Bxg5 17.Nxg5 Nce7 18.Qf3 Nxc3 19.Qxb7 Ncd5[/font] is equal (Salov-Beliavsky, IT, Madrid, 1995).

If [font color="darkorange"]12...Nb4 13.Bb1[/font] then:

If [font color="darkorange"]13...b6 14.a3 Nbd5 15.Qd3 g6[/font] then:

If [font color="darkorange"]16.Bh6 Re8 17.Ne5 Bb7 18.Qh3 Bf8 19.Bg5[/font] gives White more freedom and space, making his isolated d-pawn easy to live with (Beim-Berendsen, Op, Dieren, 1997).
[font color="purple"]16.Nxd5 Nxd5 17.Bh6 Re8 18.Ne5 Bf8 19.Qf3 Qf6[/font] is equal (Nei-Smyslov, Soviet Ch, Tbilisi, 1966).

If [font color="hotpink"]13...Bd7 14.Ne5[/font] then:

[font color="hotpink"]14...Bc6 15.Re3 g6 16.Rg3 Nd7 17.Bh6 Nxe5 18.Bxf8 Kxf8 19.dxe5[/font] gives White a small advantage in space (Portisch-Pachman, IT, Moscow, 1961).
If [font color="purple"]14...Rc8? 15.Re3![/font] then:

If [font color="purple"]15...g6 16.Bh6 Re8 17.Rg3[/font] then:

If [font color="purple"]17...Bc6 18.a3 Nbd5 19.Bxg6!! hxg6 20.Nxg6[/font] then:

If [font color="purple"]20...Kh7 21.Qd3[/font] Black resigns as he must either submit to mate or lose a forest's worth of wood (Shariyazdanov-Petukhov, Russian ChT, Sochi, 2004).
If [font color="[font color="#FF4080"]20...fxg6[/font] then White wins after [font color="[font color="#FF4080"]21.Qd3 Nf4 22.Rxg6+ Kh8 23.Bxf4 Rg8 24.Qh3+.[/font]

If [font color="burgundy"]17...Bd6[/font] then White wins after [font color="burgundy"]18.Bxg6 fxg6 19.Qb1 Re7 20.Rxg6+ .[/font]

[font color="darkpink"]15...h6[/font] then White wins after [font color="darkpink"]16.Rh3 Nbd5 17.Bxh6 gxh6 18.Qd3 .[/font]

If [font color="darkorange"]11...Bf6 12.Nxd5[/font] then:

If [font color="darkorange"]12...exd5 13.Ne5 Qb6 14.Bc3 g6[/font] then:

[font color="darkorange"]15.Qf3 Bg7 16.Qxd5 Be6 17.Qb5 Rfd8 18.Qxb6[/font] draw (Plaskett-Hillarp Persson, Op, St. Helier, Jersey, 2000).
If [font color="purple"]15.a4[/font] then:

[font color="purple"]15...a5?! 16.Qf3 Ne7 17.Bb5 Kg7 18.b4 axb4 19.Bxb4[/font] gives White more freedom and space (Melia-Kacheishvili, Op, Gibraltar, 2011).
If [font color="hotpink"]15...Bxe5 16.dxe5 d4 17.Bd2 Re8 18.f4[/font] gives White a better center against Black's blockaded passer.

If [font color="purple"]12...Qxd5 13.Be4[/font] then:

[font color="purple"]13...Qd6 14.Bc3 Ne7 15.Ne5 Nd5 16.Bd2 Bd7 17.Qh5[/font] gives White a small advantage in space (Safarli-Khotenashvili, Op, Baku, 2008).

If [font color="hotpink"]13...Qb5 14.Bc3 Ne7 15.Ne5 Nd5 16.a4 Qb6 17.Qd3[/font] gives White a better center and more space; Black is cramped (Vachier Lagrave-A. Spielmann, IT, Clichy, 2002).

If [font color="darkred"]7.Bd3 dxc4 8.Bxc4 0-0 9.0-0[/font] (this position also commonly arises out of the Nimzo-Indian/Rubinstein:1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 c5 6.Bd3 d5 7.O-O dxc4 8.Bxc4 cxd4 9.exd4) then:

If [font color="darkred"]9...b6[/font] then:

If [font color="darkred"]10.Bg5[/font] then:

If [font color="darkred"]10.Qe2 Bb7[/font] then:

If [font color="darkred"]11.Bg5 Bb7 11.Re1[/font] then:

If [font color="darkred"]11...Nbd7 12.Rc1 Rc8 [/font] then:

If [font color="darkred"] 13.Bd3 Re8 [/font] then:

If [font color="darkred"] 14.Qe2 Bxc3 15.bxc3 Qc7 [/font] then:

If [font color="darkred"] 16.Bh4 Nh5[/font] then:

[font color="darkred"]17.Qe3 Ndf6 18.Bxf6 Nxf6 19.Ne5 Nd5 20.Qh3 h6 21.Be4 b5[/font] is equal (Saunders-Wendorff, Cyberspace, 1999).
[font color="burgundy"]17.Ng5 g6 18.Nh3 e5 19.f3 Qd6 20.Bf2[/font] is equal (Anand-Topalov, World Ch Match, Sofia, 2010).

[font color="darkpink"]16.c4 Qd6 17.Rcd1 h6 18.Bc1 Qc7 19.Ne5[/font] draw (Chiburdanidze-Douven, IT, Amsterdam, 1986).

If [font color="magenta"]14.Bh4[/font] then:

If [font color="magenta"]14...Nf8 15.a3 Bxc3 16.bxc3 Ng6 17.Bg3 Nh5 18.a4[/font] is equal (Beliavsky-Nielsen, Bundesliga 0304, Germany, 2003).
[font color="darkorange"]14...Be7 15.Ne5 Nxe5 16.dxe5 Nd5 17.Bxe7 Rxe7 18.Ne4[/font] is equal (Saravanan=Prakash, Indian Ch, Nagpur, 1999).

If [font color="magenta"]13.Qb3 Bxc3 14.Rxc3 h6 15.Bh4[/font] then:

If [font color="magenta"]15...Bd5 16.Bxd5 Rxc3[/font] then:

[font color="magenta"]17.Qxc3 Nxd5 18.Bxd8 Nxc3 19.Bxb6 Nxa2 20.Bxa7 Ra8[/font] is equal and shorly agreed drawn (Lukas-Maceija, 1st Staurday February, Budapest, 1996).
[font color="purple"]17.bxc3 exd5 18.Qa3 Qc8 19.Bxf6 Nxf6 20.Qxa7 Qxc3 21.Qxb6[/font] gives White a slight advantage, but she can't maintain the extra pawn (Danielian-Als. Maric Euro Club Cup W, Saint Vincent, 2005).
[font color="darkorange"]15...Qe8 16.Nd2 Nd5 17.Rcc1 f5 18.f3 a6 19.a4[/font] gives White the advantage in space concentrated on the queenside; Black could bable to find counterplay on the kingside (Timofeev-Grigoriants, Aeroflot Op, Moscow, 2007).

If [font color="magenta"]a) 11...Bxc3 12.bxc3 Nbd7 13.Bd3 Qc7[/font] then:

If [font color="magenta"]14.Rc1 Rac8 15.Bh4[/font] then:

[font color="magenta"]15...Rfe8 16.Bg3 Qc6 17.c4 Rcd8 18.Bf1[/font] gives White a small advantage in space (Speelman-Khumaren, Op, Dublin, 1993).
[font color="purple"]15...Qf4 16.Bg3 Qg4 17.Be2 Qf5 18.Nd2 Rfd8 19.Nc4[/font] gives Black more space and stronger pawns, but he cannot exploit any of it; White has the initiative with the threat of [i[20.Nd6. winning a piece (Dvoretsky-E. Vasiukov, IT, Frunze, 1983).

[font color="darkorange"]14.c4 Rfe8 15.Bh4 Rac8 16.Bg3 Qc6 17.a4[/font] gives White an impressive advantage in space (A. Mastrovasilis-Khetsuriani, Op, Athens, 2006).

If [font color="magenta"]b) 11...Nc6 12.a3 Be7[/font] then:

If [font color="magenta"]13.Qd3 Rc8 14.Rad1[/font] then:

If [font color="magenta"]14...Nd5 15.Bxd5[/font] then:

If [font color="magenta"]15...Bxg5 16.Be4 h6 17.d5 exd5 18.Bxd5[/font] then:

[font color="magenta"]18...Rc7 19.Qe4 Qf6 20.Qg4 Bc8 21.Qc4 Bf4 22.Ne4[/font] gives White more activity and more power in the center (Bjarnason-Perunovic, Op, Reykjavik, 2008).
[font color="burgundy"]18...Bf4 19.Qf5 Qf6 20.Qxf6 gxf6 21.g3 Bb8 22.Nh4[/font] gives White more activity, stronger pawns and more space (Lerner-Kaplan, IT, Givataim, Israel, 2005).

[font color="darkpink"]15...exd5 16.Qf5 g6 17.Qxd5 Qxd5 18.Nxd5 Bxg5 19.Nxg5 Rfd8 20.Ne7+[/font] gives White a slight advantage.().

[font color="darkorchid"]14...g6 15.Bh6 Re8 16.Ng5 Bf8 17.Qh3 Bxh6 18.Qxh6 Nxd4[/font] gives Black an extra pawn and White more space (Gurieli-Chiburdanidze, Candidates TW, Groningen, 1997).

If [font color="darkorange"]13.Rc1[/font] then:

If [font color="darkorange"]13...Rc8 14.Ba2 Nd5 15.Bd2 Nxc3 16.Bxc3[/font] then:

[font color="darkorange"]16...Bf6 17.d5 exd5 18.Bxd5 h6 19.h3 Bxc3 20.Rxc3[/font] gives White the advantage in space and power in the center (Thorfinnsson-Edvardsson, Op, Reykjavik, 2000).
[font color="purple"]16...Na5 17.Ne5 Bd5 18.Bb1 g6 19.Qg4 Nc4[/font] is equal (Nikolenko-G. Airapetian, Russian ChT HL, Dagomys, 2010).

[font color="hotpink"]13...Nd5 14.Bd2 Nxc3 15.Bxc3 Bf6 16.d5 exd5[/font] draw (Gligoric-Karpov, IT, Tilburg, 1977).

If [font color="magenta"]10.Qe2 Bb7[/font] then:

If [font color="magenta"]11.Bg5 Bxc3 12.bxc3 Nbd7[/font] then:

If [font color="magenta"]13.Ne5 Qc7 14.Nxd7 Nxd7 15.Rac1[/font] then:

If [font color="magenta"]15...Qc6 16.f3 Rac8[/font] then:

If [font color="magenta"]17.Bd3 Qd6[/font] then:

[font color="magenta"]18.Rfd1 Rfe8[/font] then:

[font color="magenta"]19.Qe3 Nf8 20.Bb5 Bc6 21.Ba6 Ra8 22.c4 Ng6[/font] draw (Johannessen-Nielsen, IT, Malmö, 2002).
[font color="burgundy"]19.Qd2 Nf8 20.Bf4 Qd7 21.Be3 b5 22.Qe2 Bc6[/font] gives White a small advantage in space (Radjabov-Gelfand, Euro ChT, León, 2001).

[font color="darkpink"]18.Rfe1 Rfe8 19.Qc2 h6 20.Bh4 Nf6 21.Bg3[/font] gives White a fair advantage in space (Hillarp Persson-Rizouk, Op, Salou, Spain, 2005).

[font color="darkorchid"]17.Bb5 Qd6 18.Bh4 Nf6 19.Rfd1 Qa3 20.Qd2[/font] is equal (Lautier-Aronian, Petrosian Mem, Cyberspace, 2004).

If [font color="darkorange"]15...Rfe8 16.Bb3 h6[/font] then:

[font color="darkorange"]17.Bh4 Qc6 18.f3 b5 19.c4 bxc4 20.Bxc4[/font] gives White a small advantage with a better center (Krush-Maceija, IT, Guasdal, 2008).
[font color="purple"]17.Bd2 Qc6 18.f3 b5 19.Qf2 Nb6 20.Qg3 Kh8[/font] is equal (Johannessen-Ostenstad, Norwegian Ch, Kristiansund, 2001).

If [font color="darkorange"]13.Bd3 Qc7 14.Rac1[/font] then:

If [font color="darkorange"]14...Ng4 15.Be4 Bxe4 16.Qxe4 Ngf6 17.Qe2[/font] then:

If [font color="darkorange"]17...Rac8 18.c4 Qb7[/font] then:

[font color="darkorange"]19.Rfe1 Qa6 20.Ne5 h6 21.Bh4 Rfe8 22.Bg3 Nxe5 23.Bxe5[/font] gives White a slight edge in space (Elson-Sosonko, ZT, Barcelona, 1975).
If [font color="burgundy"]19.Qb2 Qa6 20.Qb3 Rc6 21.Rc2 Rfc8 22.Rfc1[/font] gives White a small advantage in space (Beliavsky-Karpov, Soviet Ol, Riga, 1975).

If [font color="darkpink"]17...h6 18.Bd2 Qc6 19.c4 Rfc8 20.Rfe1 Qa4 21.Bf4[/font] is equal (Ljubojevic-Ivanchuk, Amber Blind, Monte Carlo, 1996).

If [font color="purple"]14...Rfe8 15.Rfe1 Rac8 16.c4 h6 17.Bd2[/font] then:

If [font color="purple"]17...Bxf3 18.Qxf3 e5[/font] then:

[font color="purple"]19.d5 Nc5 20.Bf1 e4[/font] is equal (Gligoric-Maksimovic, Yugoslav Ch, Belgrade, 1999).
If [font color="darkpink"]19.Qg3 exd4 20.Rxe8+ Nxe8 21.Bf4 Qc6 22.Bf5 Rd8[/font] gives Black an extraq pawn (Portisch-Karpov, IT, Bugojno, 1978).

If [font color="hotpink"]17...Qd6 18.Bc3 Ng4 19.h3 Bxf3 20.Qxf3 Qh2+ 21.Kf1[/font] gives White a comfortable advantage in space (Wojtaszek-Meier, French ChT, Mulhouse, 2011).

If [font color="darkorange"]11.Rd1 Nbd7[/font] then:

If [font color="darkorange"]12.Bd2 Rc8 13.Bd3[/font] then:

If [font color="darkorange"]13...Be7 14.Rac1 Nd5[/font] then:

If [font color="darkorange"]15.Ba6 Nxc3 16.Bxc3 Bxa6 17.Qxa6[/font] then:

If [font color="darkorange"]17...Rc7 18.d5[/font] then:

[font color="darkorange"]18...Nc5 19.Qc4 Rd7 20.Qg4 g6 21.Nd4 Rxd5[/font]gives Black a small advantage in space (Kozma-Kholmov, IT. Kislovodsk, 1972).
If [font color="burgundy"]18...exd5 19.Rxd5 Bf6 20.Qd3 Qc8 21.Ng5 Bxg5 22.Rxg5[/font] gives White significantly more activity and an impressive advantage in space (Smyslov-Darga, Capablanca Mem, Havana, 1964).

If [font color="#FF2080"]17...Nf6 18.Qxa7 Ra8 19.Qb7 Rxa2 20.Ne5 Bd6[/font] is equal (Donner-Unzicker, TM, Holland, 1963).

If [font color="#FF8080"]15.Bb1 N7f6 16.Bg5 g6 17.Bh6 Re8 18.Bd3[/font] is equal (Najdorf-Filip, Ol, Varna, 1962).

If [font color="darkpink"]13...Bd6 14.Nb5 Bb8 15.Bg5 Qe8 16.Ne5 h6[/font] is equal (Gerzina-Strautins,Corres, 2006).

If [font color="purple"]12.d5 Bxc3 13.dxe6 Bxf3[/font] then:

If [font color="purple"]14.gxf3 fxe6 15.bxc3 Qc7[/font] then:

If [font color="purple"]16.Bxe6+ Kh8[/font] then:

[font color="purple"]17.Be3 Nc5 18.Bd5 Nxd5 19.Rxd5[/font] is equal (Gligoric-Unzicker, Ol, Leipzig, 1960).
If [font color="hotpink"]14.Qxf3 Ne5[/font] then:

If [font color="hotpink"]15.exf7+ Kh8 16.Rxd8 Nxf3+ 17.gxf3 Raxd8 18.bxc3[/font] then:

[font color="hotpink"]18...Nd5 19.Bg5 Rd7 20.Re1 h6[/font] is equal (Lukacs-Suba, IT, Belgrade, 1984).

If [font color="darkpink"]18...Rd7 19.Ba3 Rfxf7 20.Bxf7 Rxf7 21.Rd1 Rd7 22.Rxd7[/font] gives White a slight advamtage (Portisch-Donner, Euro ChT, Hamburg, 1965).
If [font color="#FF8000"]15.Qe2 Qc7 16.Bb3 Neg4 17.g3 Qe5 18.Qxe5 Bxe5[/font] gives Black an extra piece, but White has more freedom and the iitiative (Donner-van den Berg, IT, Beverwijk, 1965).

If [font color="burgundy"]16.Ba3 Nc5 17.Rd4 Kh8 18.Re1 Rac8 19.Qe5[/font] is equal (Aronian-Karjakin, Grnad Slam Masters, Bilbao, 2009).

[font color="darkpink"]17.f4 Nc5 18.f5 Nfe4 19.Rd4 Nxe6 20.Rxe4 Nc5[/font] is equal (Donner-Portisch, Ol, Leipzig, 1960).

If [font color="magenta"]9...a6 10.a4 Nc6 11.Bg5 Be7 12.Re1[/font] then:

If [font color="magenta"]12...Bd7 13.Qe2[/font] then:

If [font color="magenta"]13...Rc8 14.Rad1[/font] then:

If [font color="magenta"]14...Nd5 15.Bxd5 Bxg5 16.Be4[/font] then:

[font color="magenta"]16...Bf6 17.d5 exd5 18.Nxd5 Be6 19.Nf4 Qb6 20.Nxe6 fxe6 21.Qd3[/font] gives White a better center and stronger pawns (Chekhov-Sveshnikov, IT, Lvov, 1983).
If [font color="burgundy"]16...Bh6 17.d5 exd5 18.Rxd5 Qc7 19.Bxh7+ Kxh7 20.Qd3+[/font] wins back the pieces with a huge advantage (Mamedyarov-Gyimesi, Euro ChT, Goteborg, 2005).

If [font color="darkorange"]14...Nb4 15.Ne5 Be8 16.Bb3[/font] then:

[font color="darkorange"]16...Kh8 17.Qf3 Bc6 18.Qh3 Nfd5 19.Bxe7 Qxe7 20.Qg3[/font] gives White more space; Black has fewer pawn weaknesses (Olafsson-Petrosian, IT, Los Angeles, 1963).

[font color="purple"]16...Nfd5 17.Bd2 Bc6 18.Qg4 Nf6 19.Nxf7 Rxf7 20.Qxe6[/font] yields an extra pawn for White (Lautier-Bologan, French ChT, Noyon, 2001).

If [font color="darkorange"]13...Nd5 14.Bxe7[/font] then:

[font color="darkorange"]14...Ncxe7 15.Bxd5 Nxd5 16.Nxd5 exd5 17.Ne5 f6[/font] is equal (Gelfand-Dreev, IT A, Wijk aan Zee, 2002).
[font color="purple"]14...Ndxe7 15.Rad1 Nb4 16.Ne5 Nbd5 17.Nxd5 Nxd5 18.Bxd5 exd5[/font] is equal (Yanofsky-Golombek, IT, Karlovy Vary/Marianske Lazne, 1948).

If [font color="darkorange"]12...Nb4[/font] then:

[font color="darkorange"]13.Ne5 b6 14.Qf3 Ra7 15.Rad1 Nc2 16.Rf1[/font] gives White a small advatage (Ivkov-Zinn, IT, Mirabor, 1967).
If [font color="purple"]13.Qb3 Nc6 14.Rad1 Na5 15.Qa2 Nxc4 16.Qxc4[/font] then:

[font color="purple"]16...h6 17.Bxf6 Bxf6 18.Ne5 Bd7 19.Ne4[/font] gives White more activity and a clear advantage in space (Gligoric-Buljovcic, IT, Novi Sad, 1976).
If [font color="hotpink"]16...b5 17.axb5 axb5 18.Qxb5 Ba6 19.Qc6 Qb8[/font] is equal (Markos-Perunovic, Euro ChTU18, Balatonlelle, Hungary, 2001).

[font color="blue"](Fafner Defense)[/font] If [font color="blue"]5...g6 6.Qb3 Bg7 7.Nge2 0-0 8.cxd5[/font] then:

If [font color="blue"]8...Na6 9.g3[/font] then:

If [font color="blue"]9...Qb6[/font] then:

If [font color="blue"]10.Bg2 Rd8 11.0-0 Qxb3 12.axb3 Nb4[/font] then:

[font color="blue"]13.d6 exd6 14.Bf4 a6 15.Rfd1 Nc6[/font] is equal (Altounian-Kamsky, Op, Las Vegas, 2008).
[font color="steelblue"]13.Ra5 a6 14.Bf4 b6 15.Bc7 Rd7 16.Bxb6 Rb8 17.Rc5[/font] gives White an impressive advantage in space (Sorsa-Dolgov, Op, Jyvaskyla (Finland), 2000).

[font color="slateblue"]10.Qxb6 axb6 11.Bg2 Nb4 12.0-0 Rd8 13.d6 Rxd6 14.Bf4 Rd7 15.Rfd1 Nbd5 16.Be5[/font] gives White a small advantage in space (Spassky-Petrosian, World Ch Rd 5, Moscow, 1966).

If [font color="darkblue"]9...b5 10.a3 Nc7 11.Bg2[/font] then:

[font color="darkblue"]11...Bb7 12.Nf4 Rb8 13.0-0 a5 14.Re1 Re8 15.Bd2[/font] is equal (Meier-al Sayed, Areoflot Op, Moscow, 2008).
[font color="dodgerblue"]11...a5 12.0-0 a4 13.Qa2 Bf5 14.Bf4 Rc8 15.Rac1[/font] is equal (Naidisch-Iordachescu, French ChT, Mulhouse, 2011).

If [font color="darkblue"]8...Nbd7[/font] then:

If [font color="darkblue"]9.g3 Nb6 10.Bg2 Bf5 11.Nf4 Qd7[/font] then:

[font color="darkblue"]12.a4 Rac8 13.0-0 Rfd8 14.a5 Nc4 15.Rd1[/font] is equal (Kobalia-Turov, Euro ChU18, Rimavska Sobota, 1996).
[font color="darkcyan"]12.0-0 g5 13.Nfe2 h6 14.Rd1 Rfd8 15.d6 Qxd6 16.Bxb7 Rab8 17.Bg2[/font] is equal (Potkin-Turov, Russian Cup Qual, Cyberspace, 2004).

[font color="dodgerblue"]9.Nf4 Nb6 10.Be2 a5 11.a4 Qd6 12.0-0 Rd8 13.Bf3 Qb4 14.Qd1 Bf5 15.g4 g5[/font] is equal (Amonatov-Davila, Ol, Turino, 2006).

6.Bg5

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center]
[center]Caro-Kann Exchange Game: Panov Opening (MainLine[/center]
[center]Position after 6.Bc1g5[/center]

The text is the Main Line of the Panov.
[font color="red"](Panov Four Knights' Game)[/font] If [font color="red"]6.Nf3 Bg4 7.cxd5 Nxd5 8.Qb3 Bxf3 9.gxf3[/font] then:

If [font color="red"]9...e6 10.Qxb7[/font] then:

If [font color="red"]10...Nxd4 11.Bb5+ Nxb5 12.Qc6+ Ke7 13.Qxb5[/font] then:

If [font color="red"]13...Qd7 14.Nxd5+ Qxd5[/font] then:

If [font color="red"]15.Qxd5 exd5[/font] then:

If [font color="red"]16.Be3 Ke6 17.0-0-0 Bb4[/font] then:

If [font color="red"]18.Rd3 Rhc8+ 19.Kb1 Bc5[/font] then:

[font color="red"]20.Rc1 Bb6 21.Rg1 Bxe3 22.Rxe3+ Kf6[/font] is equal and shortly agreed drawn (Adams-Ponomariov, IT, Sofia, 2005).
[font color="burgundy"]20.Re1 Bxe3 21.Rdxe3+ Kf6 22.Re7 Rc4 23.Rd7 Rf4 24.Rd6+[/font] gives White a slight advantage with just a wee bit more activity (Stripunsky-Dreev, IT, Cyberspace, 2001).

If [font color="darkred"]a) 18.Kb1 Rhd8 19.Rd3[/font] then:

[font color="darkred"]19...a6 20.Rb3 Rab8 21.Ba7 Rb5 22.Bd4 f6 23.h3 Bd6[/font] gives Black a comfortable advantage in space (A. Sokolov-Spraggett, CM, St. John, New Brunswick, 1988).
If [font color="magenta"]19...Rd7 20.Rc1[/font] then:

[font color="magenta"]20...Rb8 21.Rc6+ Kf5 22.Ra6 Rbb7 23.a3 Be7[/font] is equal (L. Brunner-Adorjan, IT, Bled/Rogaska, 1990).
If [font color="darkorange"]20...Rad8 21.Rc6+[/font] then:

[font color="darkorange"]21...Kf5 22.Rd4 Be7 23.Rf4+ Ke5 24.Ra4 d4[/font] is equal.
[font color="purple"]21...Ke7 22.a3 d4 23.Rc4 dxe3 24.Rxe3+ Kf6 25.Rxb4[/font] is equal.

If [font color="darkred"]b) 18.a3 Rhc8+ 19.Kb1[/font] then:

[font color="darkred"]19...Bc5 20.Rhe1 Bxe3 21.Rxe3+ Kd6[/font] then:

[font color="darkred"]22.f4 Rab8 23.Rd4[/font] draw (Vaganian-Dreev, Soviet Ch, Odessa, 1989).
[font color="darkorange"]22.b4 Re8 23.Kc2 Re5 24.Rd4 Rc8+ 25.Kb3 Rh5[/font] gives Black the initiative on White's h-pawn (Plenca-Pejic, Op, Pula, 2010).

[font color="magenta"]19...Ba5 20.b4 Bb6 21.Rhe1 Kd6 22.Rd3 Bxe3 23.fxe3[/font] gives White a small advantage owing to his attack on the d-pawn (Tayer-Krnan, Canadian Closed, Toronto, 2006).

If [font color="darkred"]16.0-0 Ke6 17.Re1+ Kf5[/font] then:

If [font color="darkred"]18.Rd1 Rd8 19.Be3 Rd7 20.Rac1 Be7 21.Rd4[/font] then:

If [font color="darkred"]21...g5 22.Ra4[/font] then:

If [font color="darkred"]22...Bf6 23.b4 d4 24.Ra5+ Kg6 25.Bd2 Re8[/font] then:

[font color="darkred"]26.Kf1 26...d3 27.Rd1 h6 28.Be3 Bc3[/font] favors Black with the advanced passed pawn, but White can fight back by winning White's a-pawn (Adams-Dreev, IT A, Wijk aan Zee, 2002).
[font color="burgundy"]26.Rc6 Re6 27.Rxe6 fxe6 28.Kf1 h6[/font] gives Black a passed pawn; White has a distant majority (Baburin-Filipenko, Tumen, 1987).

[font color="darkpink"]22.Rc6 Rhd8 23.Kf1 Bf6 24.Rb4 d4 25.Rb5+ Be5 26.Bxg5 Kxg5 27.Rxe5+[/font] gives White active Rooks against Black's exposed King (K. Brunner-Adorjan, World ChT, Lucerne, 1989).

[font color="darkorchid"]21...Rb8 22.Rf4+ Kg6 23.b3 Rb4 24.Rg4+ Rxg4+ 25.fxg4 d4 26.Bd2 Kf6[/font] gives Black a small advantage from his passed d-pawn (Shchekachev-Bergez, Op, Fourmies, 2001).

If [font color="magenta"]18.Be3[/font] then:

If [font color="magenta"]18...Be7 19.Rac1 Bf6 20.Rc5 Rhd8[/font] then:

[font color="magenta"]21.b4 Kg6 22.b5 d4 23.Bd2 d3 24.a4 Rac8 25.Rec1 Rxc5 26.Rxc5 Rd4 27.a5 Ra4[/font] draw (Smejkal-Filip, Czechoslovakian Ch, Luhacovice, 1968).
[font color="purple"]21.b3 a6 22.Rd1 Ke6 23.Kf1 d4 24.Bf4 Rac8[/font] gives Black a passed pawn and command of an open file (Sermek-Golubovic, Op, Bled, 1994).
[font color="hotpink"]21.Rd1 Ke6 22.b4 a6 23.a4 Rab8 24.Re1 Kf5 25.Rd1 Ke6[/font] is equal (Annaberdiev-Tologontegin, Ol, Khanty-Mansiysk, 2010).

[font color="darkorange"]18...Bb4 19.Red1 Rhd8 20.Rac1 Rd7 21.Rd4 a5 22.a3[/font] gives White command of the c-file and a blockade of Black's passer (Kovacevic-Gymesi, Ol, Palma de Mallorca, 2004).

If [font color="darkred"]15.Bg5+ f6 16.Qxd5 exd5 17.Be3 Ke6 18.0-0-0 Bb4[/font] then:

If [font color="darkred"]19.a3 Rhc8+ 20.Kb1 Bc5 21.Rhe1[/font] then:

If [font color="darkred"]21...Bxe3 22.Rxe3+ Kd6 23.Rde1[/font] then:

If [font color="darkred"]23...Rc4[/font] then:

[font color="darkred"]24.h3 Rd8 25.Re6+ Kc7 26.Rc1 Rd6 27.Re8 Rxc1+ 28.Kxc1 Rc6+[/font] is equal (Ivanchuk-Giri, Amber Blind, Monte Carlo, 2011).
If [font color="burgundy"]24.Re7 Rh4 25.R1e6+ Kc5 26.Rxg7 Rxh2 27.Rxf6 Rxf2 28.Rxh7[/font] gives White at best a slight edge with an extra pawn and a passer, but Black also has a passer that is better protected (Belikov-Dreev, Op, Moscow, 1992).

If [font color="darkpink"]23...Rd8 24.Re6+ Kc7 25.Kc2 Rab8 26.b4 a5 27.bxa5 d4 28.Re7+[/font] gives White a slight advantage owing to the speed with which he can attack Black's King (Nepomniachtchi-Hrcica, World Youth, Oropessa del Mar, 2001).

If [font color="darkorchid"]21...Kd6[/font] then after [font color="darkorchid"]22.Bf4+ Kc6 23.Re6+ Kd7 24.Re2 d4 25.Be3[/font] the pin at d4 give White a slight advantage (Ragger-Ris, Bundesliga 0910, Mulheim, 2009).

If [font color="magenta"]19.Rd3 Rhd8 20.Kb1[/font] then:

If [font color="magenta"]20...Rd7 21.Rc1[/font] then:

[font color="magenta"]21...Rad8 22.a3 Be7 23.Bd4 Bd6 24.b4 Bxh2 25.Rh1 Be5 26.Rxh7 g5[/font] gives Black more freedom (Borwell-K. Tikkanen, Corres, 1998).
[font color="purple"]21...a5 22.Rc6+ Kf5 23.Rb6 Be7 24.Rb5 Ke6 25.a4 Bb4[/font] gives Black a small advantaage with more freedom; the White Rook at b5 cannot readily retreat (Bologan-Velicka, Op, Bern, 1999).

[font color="darkorange"]20...a6 21.Rg1 g5 22.f4 h6 23.fxg5 hxg5 24.h4 gxh4 25.Rg4[/font] gives White more active Rooks (Andreikin-Yilmaz, World Jr Ch, Chotowa, Poland, 2010).

If [font color="darkred"]13...Nxc3 14.bxc3 Qd5[/font] then:

If [font color="darkred"]15.Qxd5 exd5[/font] then:

If [font color="darkred"]16.Be3 Ke6 17.Rb1 Bd6 18.Kd2 Rhb8[/font] then:

If [font color="darkred"]19.Rb3 a5 20.Rhb1 a4 21.Rxb8 Rxb8 22.Rxb8 Bxb8[/font] draw (Minev-Zita, Ol, Amsterdam, 1954).
[font color="purple"]19.h3 a6 20.Rb3 Rb5[/font] draw (Foltys-Zita, IT, Szczawno Zdroj, 1950).

[font color="darkorange"]16.Rb1 Rc8 17.Rb7+ Kf6 18.Be3 Bc5 19.Kd2 Rc6 20.Rhb1[/font] is equal (Timman-Solmundarson, Op, Reykjavik, 1972).

[font color="magenta"]15.Rb1 Qxb5 16.Rxb5 Rc8 17.Rb7+ Kf6 18.Rg1 h6[/font] is equal (Howell-Hutchinson, British Ch, Scarborough, 2004).

[font color="burgundy"]10...Ndb4 11.Bb5 Rc8 12.Be3 Be7 13.d5 exd5 14.Nxd5[/font] gives White an extra pawn (Peng-Stefanova, IT B, Wijk aan Zee, 2002).

If [font color="darkred"]9...Nb6[/font] then:

If [font color="darkred"]10.Be3 e6[/font] then:

If [font color="darkred"]11.0-0-0 Be7 12.d5 exd5[/font] then:

If [font color="darkred"]13.Nxd5 Nxd5 14.Rxd5 Qc7 15.Kb1 0-0 16.f4[/font] then:

If [font color="darkred"]16...Nb4 17.Rd4[/font] then:

If [font color="darkred"]17...Nc6 18.Rd5 Nb4 19.Rd4 Nc6[/font] then:

[font color="darkred"]20.Rd1 Bf6 21.Bg2 Rfd8 22.Be4 Rxd1+ 23.Rxd1[/font] is equal (Anand-Karolyi, IT Frunze, 1987).
[font color="darkpink"]20...Rad8 21.Bg2 Bf6 22.Qa4 Qc8 23.Rc1 Qg4 24.Be4 Nd4[/font] is equal (C. van Oosterom-Kroeze, Dutch Ch ½-final, Hilversum, 2007).

[font color="burgundy"]17...Qc6 18.Rg1 Rad8 19.Rc4 Qh6 20.Be2 Nd5 21.Bf3[/font] is equal (Brynnell-Langheinrich, Bundesliga 0001, Godesberg, 2001).

If [font color="magenta"]16...Rad8 17.Bg2 Bf6[/font] then:

[font color="magenta"]18.Rc1 Rxd5 19.Bxd5 Qd7 20.Bxc6 bxc6 21.Qa4 Rb8 22.b3 Qf5+[/font] gives Black a slight advantage in space (Lenderman-Herman, Nat'l Chess Congress, Philadelphia, 2010).
[font color="darkorange"]18.Rhd1 Rxd5 19.Rxd5 Rd8 20.a3 g6 21.Ka2 Rxd5 22.Qxd5[/font] is equal (Crosa-Izquierdo, Uruguayan Ch, Montevideo, 2001).

[font color="burgundy"]13.Bxb6 Qxb6 14.Qxb6 axb6 15.Nxd5 Rxa2 16.Kb1 Ra5[/font] gives Black a slight advantage with an active Rook.

[font color="darkpink"]11.Rg1 Bb4 12.0-0-0 Bxc3 13.bxc3 g6 14.d5 Nxd5 15.c4[/font] leaves Black standing to win a Knight. (Jansa-Kraut, SX, West Germany, 1988).

If [font color="magenta"]10.d5 Nd4[/font] then:

If [font color="magenta"]11.Bb5+ Nd7 12.Qa4[/font] then:

If [font color="magenta"]12...Nxb5 13.Qxb5 g6 14.0-0 Bg7 15.Re1 0-0 16.Bg5[/font] then:

If [font color="magenta"]16...f6 17.Bf4 Ne5 18.Re3 Qc8 19.Bg3[/font] then:

[font color="magenta"]19...Re8 20.Rae1 Kf8 21.Bxe5 fxe5 22.Ne4 Qf5 23.Nc5[/font] gives White a more aggressive game (Gaponenko-Chevannes, Euro ChTW, Crete, 2007).
If [font color="burgundy"]19...Rf7 20.Rae1 Bf8 21.Qb3 Qd7 22.Ne4 Qf5 23.Rc3[/font] gives White more activity and more space (Ragger-Salem, Aeroflot Op, Moscow, 2009).

If [font color="hotpink"]16...Re8 17.d6 Bf6 18.dxe7 Rxe7 19.Rxe7 Bxe7 20.Rd1[/font] gives White a firm initiative (Potkin-Wang Hao, TM Rpd, Ningbo, 2010).

After [font color="purple"]12...e5 13.dxe6 Nxe6 14.Bg5 Nxg5 15.0-0-0[/font] White will get the piece back; draw agreed (Bologan-Boges Matoes, Anibal Op, Linares, 1999).

If [font color="darkorange"]11.Qd1 e5 12.dxe6 fxe6 13.Be3 Bc5[/font] then:

[font color="darkorange"]14.Bg2 Qh4 15.0-0 Bd6 16.h3[/font] is equal (Malaniuk-Yusadin, Soviet Ch, Moscow, 1958).
If [font color="purple"]14.b4 Qf6 15.bxc5 Nxf3+ 16.Ke2 0-0[/font] then:

[font color="purple"]17.Bg2 Rad8 18.cxb6 Rxd1 19.Rhxd1 Nh4 20.Bd4 Qf5 21.Be4[/font] gives White the material advantage (Su. Polgar-Skembris, Op, Korfu, 1990).
If [font color="hotpink"]17.cxb6 Rad8 18.Qc2 Nd4+ 19.Bxd4 Qxd4[/font] then:

If [font color="hotpink"]20.f3 Rxf3[/font] then [font color="hotpink"]21.Nd1!![/font] forces mate: If [font color="hotpink"]21...Qe5+ 22.Kxf3 Rf8+[/font] then:

[font color="hotpink"]23.Kg4 Qf4+ 24.Kh3 Qf3+ 25.Kh4 Rf4+ 26.Kg5 Qg4#[/font] and yes, that really happened (NN-Chandler, X, London, 1977).
If [font color="darkpink"]23.Qf5[/font] then [font color="darkpink"]23...Rxf5+ 24.Kg2 Qe4+ 25.Kg1 Qg4+ 26.Bg2 Qd4+ 27.Nf2 Qxf2#[/font]

[font color="burgundy"]20.Ne4 Qxa1 21.bxa7 Rc8 22.Qd3 Qxa2+ 23.Ke3 Qxa7+ 24.Ke2 Qa2+ 25.Ke3 Rc2[/font] gives Black a tremendous attack.

6...Be6 7.Be2

If [font color="red"]7.a3[/font] then:

If [font color="red"]7...g6 8.Bxf6 exf6[/font] then:

If [font color="red"]9.c5 Bg7 10.Bb5 0-0 11.Nge2 f5[/font] then:

If [font color="red"]12.Qd3 f4[/font] then:

[font color="red"]13.Rd1 Bg4 14.h3 Bxe2 15.Nxe2 f3 16.gxf3 Re8[/font] (Freidel-Wang Hao, World Cup, Khanty-Mansiysk, 2010).
[font color="burgundy"]13.Bxc6 bxc6 14.Nxf4 Qb8 15.Qd2 Bh6 16.Nce2 Re8[/font] gives Black a better center, command of the b-file, more activity for his pieces, the Bishop pair and superior development; White has an extra pawn and stronger pawns (Solodovnichenko-Herman, Crespi Mem, Milan, 2010).

[font color="darkpink"]12.0-0 Qf6 13.Bxc6 bxc6 14.f4 Bc8 15.Qd3 a5[/font] gives Black more freedom to grab more space (Friedel-Granda Zuñiga, Pan-Am Ch, São Paulo, 2009).

[font color="darkorchid"]9.g3 Qd7 10.Bg2 Ne7 11.c5 h5 12.Qf3 Bg7[/font] is equal (Kobalia-Grigoriants, Russian Ch HL, Taganrog, 2011).

If [font color="darkred"]7...Qd7 8.b4[/font] then:

If [font color="darkred"]8...dxc4 9.Bxf6 gxf6 10.d5 0-0-0[/font] then:

[font color="darkred"]11.dxc6 Qxc6 12.Qa4 Qxa4 13.Nxa4 Bh6 14.Be2[/font] is equal (Wunderlich-Hofstetter, Corres, 2002).
[font color="darkorange"]11.Bxc4!? Ne5! 12.Bb5 Qc7 13.Nge2 a6! 14.Qd4 axb5[/font] gives Black a fair advantage thanks to the pin at d5 (Lanka-Adianto, Op, Adelaide, Australia, 1990)

[font color="magenta"]8...Rd8 9.Bxf6 gxf6 10.c5 a6 11.g3 Bg4[/font] gives White more space and the initiative (Gaujens-Wunderlich, Corres, 2007)

If [font color="blue"]7.Nf3[/font] then:

If [font color="blue"]7...Ne4[/font] then:

If [font color="blue"]8.Nxe4 dxe4 9.d5 exf3[/font] then:

If [font color="blue"]10.dxe6 Qa5+ 11.Qd2 Qe5+ 12.Qe3[/font] then:

[font color="blue"]12...Qxb2 13.exf7+ Kxf7 14.Rd1 Qb4+ 15.Rd2 Rd8 16.Qxf3+[/font] gives White a small advantage in space (Shavana-Kacheishvili, Euro Ch, Kusasdasi, Turkey, 2006).
[font color="darkcyan"]12...Qa5+ 13.Qd2 Qe5+ 14.Be3 Qxe6 15.Qd5 Qf6 16.0-0-0[/font] is equal (Thorfinnsson-Thorgeirsson, Op, Reykjavik, 2011).

[font color="dodgerblue"]10.Qxf3?! Ne5! 11.Qc3 Bc8!! 12.Qxe5 f6! 13.Bxf6 gxf6[/font] gives Black an extra Bishop (Bardason-Tinjaca, Corres, 1999).

If [font color="darkblue"]8.c5 Bg4 9.Be3[/font] then:

If [font color="darkblue"]9...Nxc5?! 10.dxc5 d4[/font] then:

[font color="darkblue"]11.Bxd4?! Bxf3 12.Qxf3 Qxd4 13.Bb5 Qxc5 14.0-0 e6[/font] is equal (Timofeev-So, Aeroflot Op, Moscow, 2010).
[font color="darkcyan"]11.Qb3 Bxf3 12.gxf3 dxe3 13.fxe3 Rb8 14.Rd1[/font] gives White a comfortable advantage in space.

[font color="dodgerblue"]9...Nxc3 10.bxc3 e6 11.Qb3 Qd7 12.Ne5[/font] gives White a slight advantagee in space.

If [font color="darkblue"]7...g6 8.Bxf6 exf6[/font] then:

If [font color="darkblue"]9.c5 Bg7 10.h3[/font] then:

[font color="darkblue"]10...0-0 11.Bb5 Rc8 12.0-0 f5 13.Qd2 h6 14.Bxc6 bxc6 15.Ne5[/font] is equal (I. Zaitsev-Shamkovich, IT, Moscow, 1967).
[font color="darkcyan"]10...h5 11.Bb5 Qc7 12.b4 0-0 13.Bxc6 bxc6 14.0-0[/font] is equal (Gipslis-Zurek, Op, Pardubice, 1994).

[font color="dodgerblue"]9.Be2 Bb4 10.c5 Bxc3+ 11.bxc3 0-0 12.Nd2 Na5[/font]is equal (Teterev-Kryvoruchko, Euro Club Cup, Rogaska Slatina, Slovenia, 2011).

If [font color="#008000"]7.Bxf6 gxf6[/font] then:

If [font color="#008000"]8.c5[/font] then:

If [font color="#008000"]8...Qd7 9.Bb5 Rg8 10.g3 0-0-0[/font] then:

[font color="#008000"]11.Qh5 Bg4 12.Qxh7 Qe6+ 13.Kf1 Nxd4 14.Qxg8 Bh6[/font] gives Black the initiative; both sides must be careful (Mainka-Miles, Op, Bad Wörishofen, 1989).
[font color="#808000"]11.Nge2 Bg4 12.Qd3 e5 13.Bxc6 Qxc6 14.b4 e4[/font] is equal (Blum-Skeels, Corres, 2000).

[font color="#254117"]8...h5 9.Bb5 Bh6 10.Nge2 Rg8 11.g3 Qd7 12.f4[/font] is equal (Naiditsch-Sutovsky, IT, Poikovsky, 2009).

If [font color="#6CC417"]8.Nf3 Qd7 9.Be2[/font] then:

[font color="#6CC417"]9...Rd8 10.cxd5 Bxd5 11.Nxd5 Qxd5 12.0-0 Bh6 13.Qc2[/font] (Fedorowicz-Miles, US Ch, New York, 1988).
[font color="forestgreen"]9...Rg8 10.cxd5 Bxd5 11.Nxd5 Qxd5 12.0-0 Bh6 13.Qd3[/font] is equal (Cueto Chajtur-V. Georgiev, Ol, Torino, 2006).

7...Qa5 8.Nf3

If [font color="red"]8.c5 Ne4[/font] then:

If [font color="red"]9.Bd2[/font] then:

[font color="red"]9...Nxd2 10.Qxd2 g6 11.Bb5 Bg7 12.h3 0-0 13.Nf3[/font] is equal (Howell-Berczes, Op, Winterthur, 2008).
[font color="burgundy"]9...Qd8 10.Bf3 Nxd2 11.Qxd2 g6 12.Nge2 h5 13.Nf4[/font] gives White a slight advantage in space (Robson-Berkes, IT, Paks, Hungary, 2010).

If [font color="darkred"]9.Nf3 Bg4[/font] then:

[font color="darkred"]10.Bd2 Nxd2 11.Nxd2 Bxe2 12.Nxe2 g6 13.Qb3 0-0-0[/font] gives Black a slight advantage in space (Timofeev-Khairullin, Russia Cup, Belgorad, 2010).
[font color="magenta"]10.Qb3 0-0-0 11.Be3 e5 12.0-0 Bxf3 13.Bxf3[/font] is equal.

8...dxc4

[font color="red"]8...0-0-0 9.0-0 dxc4 10.Qc1 Bg4 11.Ne5 Nxd4 12.Nxc4[/font] (Christ-Berezovsky, German Ch, Altenkirchen, 2001).

9.0-0 Rd8 10.Re1

[font color="red"]10.Rc1 Nxd4 11.Nxd4 Rxd4 12.b4 Qd8 13.Be3 Rd7[/font] gives Black a small initiative (Ramesh-Adianto, Op, Sakthi Madras, Indonesia, 1996).

10...a6 (N)

[font color="red"]10...h6 11.Bxf6 gxf6 12.Bf1 Bg7 13.Rxe6 fxe6 14.Bxc4 f5[/font] leaves Black a clear exchange to the good; White has active minor pieces (Kulaots-Fauland, Euro Ch, Aix-les-Bains, 2011).
[font color="blue"]10...b5 11.Qc1 b4 12.Bxf6 bxc3 13.d5 Bxd5 14.Bxc3[/font] gives White more activity and the initiative (Stocek-Zurek, Czech ChT 0203, Czechia, 2002).

11.a4 h6

Black has an extra pawn and a fair advantage in space.

12.Bxf6 gxf6 13.Bf1

[font color="red"]13.d5 Bxd5 14.Nxd5 Qxd5 15.Qc2 b5 16.axb5 axb5[/font] gives Black a piece for two pawns.

13...Qf5?!

The veteran Turov is a stronger player than the 18-year-old Dutch woman. He allows himself liberties he probably woundn't take against an opponent closr to his playing strength.
Black needs to complete his development before undertaking any concrete action.
Better is [font color="red"]13...Bg4 14.d5 Ne5 15.Be2 Bxf3 16.Bxf3 h5[/font] when Black continues to possess an extra pawn and more space; the Bishop can now develop via g7 or h6.

14.Ne4?!

White misses an excellent restraining move.
Fritz recommends [font color="red"]14.a5! Nxa5 15.Qa4+ Nc6 16.Bxc4 Bxc4 17.Qxc4 Rg8[/font] with equality.

14...Rg8

Black continues to enjoy a small advantage with an extra pawn and more space.

15.Rc1?!

Black begins to falter against her more experienced opponent.
If [font color="red"]15.g3 h5 16.Bg2 Nb4 17.Nc5 Bd5 18.Nh4 Qg4[/font] gives White a fair advantage in space.

15...Bd5!

Black finds the best reply, putting pressure on White's centralized Knight.

16.Nh4 Qf4!

Black keeps pressure on the centralized Knight.
If [font color="red"]16...Qxe4?! 17.Rxe4!! Bxe4[/font] then:

[font color="red"]18.Qe1 f5 19.f3 Bd3 20.Bxd3 cxd3 21.Rd1[/font] gives White a better center and stronger pawns; Black has command of the g-file, but also an immobile Bishop.
[font color="darkred"]18.Rxc4 f5 19.g3 Bg7 20.Bg2 Bf6 21.Nf3[/font] gives White power in the center and better pawns; BlaCK compenstes for his weak pawns wioth control of the g-file.

17.Qf3

If [font color="red"]17.Bxc4?[/font] then:

Black wins after [font color="red"]17...Bxe4! 18.Qb3 Rg7 19.Qxb7 Rb8 20.Qxa6 Rxb2[/font] when he is a piece to the good.
If [font color="darkred"]17...Bxc4? 18.Rxc4 Qxh4 19.d5 Qf4[/font] then:

If [font color="darkred"]20.Rxc6 bxc6 21.Qc1 Rxg2+ 22.Kxg2 Qg4+[/font] then:

[font color="darkred"]23.Kh1 Qf3+ 24.Kg1 Qg4+ etc. draws.[/font]
[font color="darkorange"]23.Ng3?! cxd5! 24.Qc6+ Qd7 25.Qxa6 e6 26.a5 Rb8[/font] gives Black an extra pawn.

[font color="magenta"]20.g3 Rg6 21.Qc2 Rxd5 22.Rxc6 bxc6 23.Qxc6+ Rd7 24.Qc8+ Rd8 25.Qc6+ etc.[/font] draws.

17...Qxf3

The text is the only playable move.
If [font color="red"]17...Qxh4??[/font] drops the Queen and the game to [font color="red"]18.Nxf6+!! Qxf6 19.Qxf6 Bg7 20.Qf4.[/font]

18.Nxf3 Bxe4 19.Rxe4

[center]BLACK: Maxim Turov[/center]

[center][/center]

[center]WHITE: Anne Haast[/center]
[center]Position after 19.Re1e4:B[/center]

19...f5!

Black attacks the Rook at e4, giving White a choice between two plans.
If [font color="red"]19...e6?! 20.Rxc4! f5 21.Re3 Bg7[/font] then:

[font color="red"]22.Rd3 Bf6 23.h3 Ke7 24.Rc5 Kd6 25.Rd2 Rc8[/font] leaves Black with only a small advantage in space.
[font color="darkred"]22.Rc1 Bxd4 23.Rb3 Na5 24.Nxd4 Rxd4[/font] gives Black more space and White more freedom owing to the attack on b7 that ties Black's Knight to the defense of the pawn.

20.Rf4

White chooses to recover her lost pawn. The alternative is to keep pressure on the King.
If [font color="red"]20.Ree1 Nxd4 21.Nxd4 Rxd4[/font] then:

[font color="red"]22.Bxc4 Rg6 23.g3 Rb6 24.b3 e6[/font] gives Black an extra pawn, more freedom and a substanial advantage in space.
[font color="darkred"]22.Rxc4 Rxc4 23.Bxc4 Rg4 24.b3 Rd4[/font] gives Black an extra pawn and more freedom.

20...Rg4

Black can preserve the pawn at f5 and surrender the one at c4.
If [font color="red"]20...e6 21.Rxc4 Rg4[/font] when:

[font color="red"]22.g3 Rxf4 23.gxf4 Be7 24.h4 f6 25.Bg2 Kf7[/font] gives Black fewer pawn weaknesses.
If [font color="darkred"]22.Rxg4 fxg4[/font] then:

[font color="darkred"]23.Ne5 Na5 24.Rc7 Bd6 25.Rc3 Bxe5 26.dxe5 Rd4[/font] gives Black the initiative and a comfortable advantage in space.
[font color="magenta"]23.d5 Rxd5 24.Rxg4 Rd1 25.Rc4 Rb1 26.Rc2 Bg7[/font] assures Black of winning back the extra pawn.

21.Rxf5

White temporarily recovers the pawn minus.
[font color="red"]21.Rxg4?! fxg4 22.Ne5 Nxe5 23.dxe5 b5 24.axb5 axb5[/font] continues to give Black the benefit of the extra pawn, now manifest as a queenside majority.

21...e6 22.Rh5 Nxd4

Black again is a pawn to the good.

23.Ne5 Re4 24.Nxc4

Each side has five pawns.

24...Nb3 25.Rc3 Rd1 26.g3?

This costs White material, but in the most elegant way.
Surviving is [font color="red"]26.Ne3 Rxe3 27.fxe3 Nd2 28.Kf2[/font] when:

[font color="red"]28...Ne4+! 29.Ke2 Nxc3+ 30.bxc3 Rc1 31.Rh4 Rxc3[/font] leaves Black with an extra pawn.
[font color="darkred"]28...Bg7?[/font] drops a piece to [font color="darkred"]29.Ke2! Rb1 30.Rc8+ Kd7 31.Rg8 Bxb2.[/font]

[center]BLACK: Maxim Turov[/center]

[center][/center]

[center]WHITE: Anne Haast[/center]
[center]Position after 26.g2g3[/center]

26...Rxc4!!

Black begins the combination by sacrificing the exchange.

27.Rxc4 Rxf1+!

Black sacrifices another exchange.

28.Kxf1 Nd2+!

White caps off the combination by winning the Rook, leaving his with two minor pieces against a Rook.

29.Ke2 Nxc4 30.b3

[font color="red"]30.Rh4 Nxb2 31.a5 f5 32.Rd4 Be7 33.h3 Ba3[/font] continues to give Black an extra pawn.

30...Nd6 31.Rh4 Bg7 32.Kd3

White might last longer after [font color="red"]32.Rg4 Kf8 33.Rh4 f5 34.Kd3 Ke7 35.f3 Kf7.[/font

32...f5 33.f3 Kf7 34.Rb4

If [font color="red"]34.Kc2 e5 35.Kd1 Kg6[/font] then:

If [font color="red"]36.g4 Kg5 37.Rh3 fxg4 38.Rg3[/font] then:

[font color="red"]38...h5! 39.fxg4 hxg4 40.h3 Bf6 41.Rg2 e4[/font] passes the e-pawn.
Also good is [font color="magenta"]38...Bf8 39.Rxg4+ Kf6 40.Rg8 Kf7 41.Rg2 Nf5.[/font]

[font color="darkred"]36.Rh3 h5 37.g4 hxg4 38.fxg4 fxg4 39.Rg3 Kg5[/font]passes the e-pawn and gives Black more freedom.

[center]BLACK: Maxim Turov[/center]

[center][/center]

[center]WHITE: Anne Haast[/center]
[center]Position after 26.g2g3[/center]

34...e5!

The e-pawn threatens to pass.

35.g4

This is the only way to keep the e-pawn from passing.
The pawn passes in [font color="red"]35.Rh4 Kg6 36.a5 e4+ 37.fxe4 fxe4+ 38.Kc2 Bd4.[/font]

35...e4+ 36.Ke2

If [font color="red"]36.Ke3[/font] then after [font color="red"]36...Bc3! 37.Rb6 f4+ 38.Kxf4 Bd2+ 39.Kg3 e3[/font] the pawn queens.

36...fxg4 37.fxe4 Bc3 38.Rb6 Ke6 0-1

Black's position is safe.
If [font color="red"]39.Kf1 Bd4[/font] then:

[font color="red"]40.Rxd6+ Kxd6 41.Kg2 h5[/font] Black wins easily.
[font color="darkred"]40.e5 Bxb6 41.exd6 Kxd6 42.Kg2 Ke5 43.Kg3 h5[/font] wins.

[font color="blue"]39.Ke3[/font] loses quickly to [font color="blue"]39...Be5 40.a5 Bxh2.[/font]
Mw. Haast resigns.

Jack Rabbit

(45,984 posts)

6. Carlsen - Aronian, Group A, Round 3

Reply to Jack Rabbit (Reply #2)

Thu Feb 23, 2012, 09:09 PM

Feb 2012

Last edited Fri Feb 24, 2012, 05:39 AM - Edit history (1)

VIDEO LINK: See The Mozart of Chess, a profile of Magnus Carlsen, from 60 Minutes.

Magnus Carlsen took the opportunity of their individual encounter in the third round to remind Aronian who's number one.

Magnus finished tied for second with Teimour Radjabov and Fabiano Caruana.

[center]

[/center]

[center]Magnus Carlsen[/center][font size="1"]Photo by Stefan64 http://commons.wikimedia.org/wiki/User:Stefan64 from Wikipedia http://en.wikipedia.org/wiki/Magnus_Carlsen (Creative Commons License http://creativecommons.org/licenses/by-sa/3.0/deed.en , Attribution/Share Alike)
[/font]

Magnus Carlsen - Levon Aronian
http://www.chessgames.com/perl/chessgame?gid=1653900
Tata Steel Chess Tournament (Group A), Round 3
Wijk aan Zee, 16 January 2012

Orthodox Queen's Gambit: Alatorsev Defense

1.c4 e6 2.Nc3 d5 3.d4 Be7

This is the Alatorsev Defense, one of the more theory-free lines in the Orthodox Queen's Gambit. Black is signaling that he doesn't want a theoretical discussion.

4.cxd5

White seems to want to play hooky from school, too.
[font color="red"]4.Nf3 Nf6 5.Bg5[/font] is the Main Line of the Orthodox Queen's Gambit.

4...exd5 5.Bf4 c6 6.Qc2

As the Alatorsev Defense goes, this isn't too unusual.
More common than the text is [font color="red"]6.e3 Bf5[/font] then:

If [font color="red"]7.g4 Be6[/font] then:

If [font color="red"]8.h4 Nd7 9.h5[/font] then:

If [font color="red"]9...Nh6 10.Be2 Nb6[/font] then:

If [font color="red"]11.Nh3 g5 12.hxg6 hxg6[/font] then:

If [font color="red"]13.f3 Bh4+[/font] then:

[font color="red"]14.Kd2 g5 15.Bh2 f5 16.gxf5 Nxf5 17.Be5 Rh6[/font] is equal (Vaisser-Timoshchenko, IT, Tashkent, 1987).
If [font color="darkred"]14.Nf2!? g5 15.Bh2 Qe7[/font] then:

[font color="darkred"]16.Qc2 f5 17.Be5 Rf8 18.0-0-0 Nf7[/font] gives Black a small advantage with a kingside initiative (Onischuk-Lputian, IT, Poikovsky, 2001).
If [font color="magenta"]16.e4!? dxe4[/font] then:

[font color="magenta"]17.fxe4?! Nc4! 18.Bxc4 Nxg4 19.Bg3[/font] gives Black a strong kingside advantage (Turov-Vaganian, Aeroflot Op, Moscow, 2002).
[font color="darkorange"]17.Ncxe4 Bd5 18.Be5 Bxe4 19.Rxh4 Bd5 20.Bxh8 gxh4[/font] gives Black a passed pawn and the advantage in space.

[font color="burgundy"]13.Bg3 Qd7 14.Nf4 0-0-0 15.Nxe6 Qxe6[/font] is equal (Aronian-Nakamura, Grand Slam Final, Bilbao, 2011).

[font color="darkpink"]11.Rc1 Bd6 12.Nh3 Bxf4 13.Nxf4 Bd7 14.Rg1[/font] is equal (Kasparov-Karpov, World Ch Match 85, Moscow, 1985).

If [font color="darkred"]9...Qb6 10.Rb1 Ngf6 11.f3[/font] then:

If [font color="darkred"]11...h6 12.Bd3 c5 13.Nge2[/font] then:

If [font color="darkred"]13...Rc8[/font] then:

[font color="darkred"]14.Kf2 cxd4 15.exd4 a6 16.Rc1[/font] is equal (Knaak-Balashov, IT, Sochi, 1980).

[font color="purple"]14.Kf1 0-0 15.g5 hxg5 16.Bxg5 Rfe8 17.Qe1[/font] is equal (Knaak-Geller, IT, Moscow, 1982).

[font color="darkorange"]13...c4 14.Bc2 Qa5 15.Kf2 b5 16.a3 Qb6 17.b3[/font] gives White a small advantage in space concentrated on the kingside, but Black has potential counterplay on the queenside (Riazantsev-Sanikidze, Euro Ch, Dresden, 2007).

[font color="magenta"]11...0-0 12.Bd3 c5 13.Nge2 Rac8 14.Kf1 cxd4 15.exd4[/font] gives White a slight advantage in space (Beliavsky-Geller, Soviet Ch, Moscow, 1983).

If [font color="darkred"]8.h3[/font] then:

If [font color="darkred"]8...Nd7 9.Bd3 h5 10.gxh5 Ndf6[/font] then:

If [font color="darkred"]11.h6 Nxh6 12.Qc2[/font] then:

[font color="darkred"]12...Nh5 13.Be5 f6 14.Bh2 Bd6 15.Bg6+ Bf7 16.Nf3[/font] is equal (Botvinnik-Petrosian, World Ch Match, Moscow, 1963).
[font color="burgundy"]12...Qd7 13.Nf3 Bf5 14.Ne5 Bxd3 15.Nxd3 Bd6 16.Be5[/font] is equal (Lputian-Geller, Soviet Ch, Riga, 1985).

[font color="darkpink"]11.Qf3 Nxh5 12.Nge2 Bd6 13.Bxd6 Qxd6 14.0-0-0 Ngf6[/font] is equal (Mamedyarov-Solomon, Ol, Khanty-Mansiysk, 2010).

If [font color="magenta"]8...Nf6 9.Nf3[/font] then:

If [font color="magenta"]9...Nbd7 10.Bd3 Nb6 11.Qc2 g6 12.Bh6 Nc4 13.Bxc4[/font] gives White a small advantage in space (Bronstein-Darga, IZT, Amsterdam, 1964).
If [font color="darkorange"]9...0-0 10.Bd3 c5[/font] then:

If [font color="darkorange"]11.Kf1 Nc6 12.Kg2 Rc8[/font] then:

[font color="darkorange"]13.Rc1 Re8 14.dxc5 Bxc5 15.Nb5 Bf8 16.Nfd4[/font] gives White a fair advantage in space (Korchnoi-Karpov, World Ch Match, Merano, 1981).
[font color="purple"]13.dxc5 Bxc5 14.Ne2 Ne4 15.Rc1 Be7 16.Nfd4 Nxd4 17.Nxd4[/font] gives White a small advantage in space (Bronstein-Kuijpers, IT, 1968).

[font color="hotpink"]11.dxc5 Bxc5 12.Qc2 Nc6 13.a3 g6 14.Nb5 Be7[/font] is equal (Bitalzadeh-de Rosa Husman, Dutch ChT, 2010).

If [font color="darkred"]7.Nge2 Nf6 8.h3[/font] then:

[font color="darkred"]8...Bg6 9.Bh2 Qb6 10.Qd2 Ne4 11.Nxe4 Bxe4 12.Nc3[/font] gives Black more space, but there's little to do with it (Yurenol-Halldorsson, Op, Reykjavik, 2010).
[font color="magenta"]8...Be6 9.Bh2 Nbd7 10.Nf4 Nf8 11.Bd3 Bd6 12.Qb3[/font] (Grigoriants-Maze, Aeroflot Op, Moscow, 2005).

6...Nf6

If [font color="red"]6...g6 7.e3 Bf5 8.Qd2[/font] then:

If [font color="red"]8...Nf6[/font] then:

If [font color="red"]9.f3 h5 10.Bd3 Bxd3 11.Qxd3[/font] then:

If [font color="red"]11...Nbd7 12.Nge2 0-0[/font] then:

[font color="red"]13.0-0 b5 14.Rac1 Rc8 15.Rc2 b4 16.Na4[/font] gives White a fair advantage in space (Kacheishvili-Goldin, Op, Orlando, Florida, 2011).
[font color="purple"]13.e4 dxe4 14.fxe4 Nc5 15.Qf3 Ne6 16.0-0-0[/font] gives White a fair advantage in space (M. Gurevich-Geller, Moscow, 1987).

[font color="darkorange"]11...Na6 12.Nge2 Nc7 13.0-0 Ne6 14.Be5 h4 15.Rae1[/font] is equal (Topalov-Karpov, IT A, Wijk aan Zee, 1998).

[font color="magenta"]9...c5 10.Bh6 cxd4 11.exd4 a6 12.g4 Be6 13.Nge2[/font] gives White a fair advantage in space (Kasparov-Short, Ol, Thessaloniki, 1988).

[font color="darkred"]8...h5 9.h3 Nf6[/font] transposes into the text.

7.h3

If [font color="red"]7.e3 0-0 8.Bd3 Nbd7 9.Nf3 Re8 10.h3 Nf8[/font] then:

If [font color="red"]11.0-0-0B e6[/font] then:

If [font color="red"]12.g4 Qa5[/font] then:

[font color="red"]13.Nd2 Rac8 14.Kb1 N6d7 15.Bg3 a6 16.f4[/font] gives White a comfortable advantage in space (Kharlov-Rustemov, Russian ChT, Sochi, 2004).
[font color="burgundy"]13.Kb1 Rac8 14.Nd2 b5 15.Bg3 N6d7 16.f4[/font] gives White a fair advantage in space (Bosch-Dambacher, Dutch Ch, Leeuwarden, 2001).

If [font color="darkred"]12.Kb1[/font] then:

[font color="darkred"]12...Qa5 13.Ng5 Rac8 14.Be5 h6 15.Nxe6 Nxe6 16.f4[/font] is equal (Del Rio Angelis-Lorenzini, Anibal Op, Linares, 2005).
[font color="magenta"]12...a5 13.Ng5 g6 14.Be5 N6d7 15.Nxe6[/font] gives White a slight advantage in space (Miles-Schulz, Bundesliga 8485, Germany, 1985).

If [font color="darkred"]11.0-0[/font] then:

If [font color="darkred"]11...Ng6 12.Bh2 Bd6 13.Bxd6 Qxd6 14.Rab1[/font] then:

If [font color="darkred"]14...Qe7 15.b4 a6[/font] then:

If [font color="darkred"]16.a4 Ne4 17.b5 axb5 18.axb5[/font] then:

If [font color="darkred"]18...Ng5 19.Nxg5 Qxg5 20.f4 Qf6[/font] then:

[font color="darkred"]21.f5 Nh4 22.Nd1 Qg5 23.bxc6 bxc6 24.Kh2 g6 25.fxg6 hxg6[/font] is equal (Le Quang Liem-Grachev, World Cup, Khanty-Mansiysk, 2011).
[font color="burgundy"]21.bxc6 bxc6 22.Rfe1 Ba6 23.Ra1 Bxd3 24.Qxd3 Nh4[/font] is equal (Reshevsky-Szabo, IT, Dallas, 1957).

[font color="darkpink"]18...Ra3 19.Ne2 Bf5 20.bxc6 bxc6 21.Ra1 Rxd3 22.Qxd3[/font] gives White a Rook for a Bishop, an active Rook advantage and better pawns; Black has more space in the center (Timoshchenko-Pokorna, Slovakian ChT, 2001).

If [font color="magenta"]16.Na4 Ne4 17.Nc5[/font] then:

If [font color="magenta"]17...f5?! 18.Rfe1![/font] (White has a fair advantage in space) [font color="magenta"]18...Nh4 19.Nxh4 Qxh4[/font] then:

[font color="magenta"]20.a4?! Ng5![/font] (Black has counterplay on the kingside) [font color="magenta"]21.f4 Ne4 22.Bxe4 fxe4 23.b5[/font] is equal (Reshevsky-Shainswit, US Ch, New York, 1940).
[font color="purple"]20.Rb3 Nxc5 21.bxc5 f4 22.Qe2 Rb8 23.Reb1[/font] continues to give White a fair advantage.

[font color="darkorange"]17...Bf5! 18.a4 Rac8 19.Rfd1 Rc7 20.Rdc1[/font] continues to give White a small advantage in space

If [font color="magenta"]14...a5 15.a3[/font] then:

[font color="magenta"]15...Bd7 16.Rfc1 Qc7 17.b4 axb4 18.axb4 Rec8 19.Na4[/font] gives White a strong build up on the queenside (Zhao Xue-Ebtam, Asian Games TTW, Guangzhou, 2010).
[font color="darkorange"]15...Ne7 16.Na4 g6 17.Nc5 Nd7 18.b4 axb4 19.axb4[/font] gives White a small advantage in space (Maceija-E. L'Ami, Ol, Khanty-Mansiysk, 2010).

If [font color="magenta"]11...Ne6[/font] then:

[font color="magenta"]12.Be5 g6 13.Rab1 Ng7 14.b4 a6 15.a4[/font] (Beliavsky-Afifi, World ChT, Lucerne, 1989).
[font color="darkorange"]12.Bh2 g6[/font] then:

[font color="darkorange"]13.Rab1!? Ng7 14.b4[/font] then:

[font color="darkorange"]14...a6! 15.Na4 Bf5 16.Nc5 Qc8[/font] then:

[font color="darkorange"]17.Rfc1 Bxd3 18.Nxd3 Nf5[/font] gives White a small advatage in space (Dreev-Khairullin, Aeorflot Op, Moscow, 2007).
[font color="burgundy"]17.Ne5 Bxd3 18.Ncxd3 Nf5 19.a4 Nd6 20.Rfc1[/font] gives White a small advantage in space (Navara-Maghalashvili, Euro Ch, Warsaw, 2005).

[font color="hotpink"]14...Ne6?! 15.Be5 a5 16.b5 c5 17.b6 Bd7 18.dxc5[/font] gives White a substantial advantage in space.

[font color="purple"]13.Ne5! Bd6 14.Rac1 Qe7 15.Kh1 Nd7 16.f4 Nxe5[/font] gives White a fair advantage in space.

7...g6 (N)

As they seemed eager to do, the players close the book early.
If [font color="red"]7...Qa5 8.Nf3 Ne4 9.Bd2 Nxd2 10.Nxd2 g6 11.e3 Bf5 12.Bd3 Bxd3 13.Qxd3 Qd8 14.0-0 Nd7 15.Rfc1 0-0 16.Rab1 a5 17.Na4 Nb6 18.Nxb6 Qxb6 19.Nb3 a4[/font] draw (Lupulescu-Giri, Euro ChT, Porto Carras, 2011).

8.e3

White has a small advantage in space with development yet to be completed.

8...Bf5 9.Qd2!?

Why should White yield to such idle threats? The Bishop is Black's strongest piece, so why not dive it away?
If [font color="red"]9.Bd3 Bxd3 10.Qxd3[/font] then:

[font color="red"]10...Qa5 11.Nf3 Qa6 12.Qxa6 Nxa6 13.Ke2[/font] gives White a small advantage in space.
[font color="darkred"]10...Qb6 11.Nf3 Qa6 12.Qxa6 Nxa6 13.Ke2[/font] transposes.

9...h5?!

Black unnecessarily weakens his queenside.
If [font color="red"]9...Nbd7[/font] then:

[font color="red"]10.Bd3 Ne4 11.Bxe4 Bxe4 12.Nxe4 dxe4 13.Ne2[/font] gives White a slight advantage in space.
[font color="darkred"]10.Nge2 0-0 11.Ng3 Be6 12.Bd3 Rc8 13.0-0[/font] is equal.

10.Bd3 Bxd3 11.Qxd3 Nbd7!?

11...Qb6 is stronger.
If [font color="red"]11...Qb6! 12.Nf3 Qa6[/font] then:

[font color="red"]13.Qxa6 Nxa6 14.Ke2 Nb8 15.Ne5 Nbd7 16.Rad1 Nf8[/font] is equal.
If [font color="darkred"]13.Ne5 Nfd7[/font] then:

[font color="darkred"]14.Qxa6 Nxa6 15.Nf3 Nf8 16.Bh2 Ne6[/font] is equal.
[font color="magenta"]14.Kd2 Nxe5 15.Qxa6 Nxa6 16.Bxe5 f6 17.Bg3 h4[/font] is equal.

12.Nge2!?

White gets better results playing more aggressively.
If [font color="red"]12.Nf3![/font] (the Knight eyes the weak squares e5 and g5) [font color="red"]12...0-0 13.0-0 Bb4 14.a3! Bxc3 15.bxc3 Ne4 16.c4 g5 17.Bh2[/font] gives White a threat to isolate Black's d-pawn and a fair advantage in space.
[font color="darkred"]14.Ng5!? Qe7 15.Ne2 Nb6 16.a3 Bd6 17.Bxd6 Qxd6 18.Nf4[/font] gives White a small advantage

12...a5?!

Black misses his chance.
[font color="red"]12...0-0 13.0-0 Re8! 14.a3 Nb6 15.b3 h4 16.f3[/font] is equal.

13.0-0 0-0

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 13...0-0[/center]

14.f3!

White prepares to occupy the center with pawns.

14...b5

[font color="red"]14...Re8 15.e4 Nf8 16.Be3 Ne6 17.e5 Nd7 18.f4[/font] gives White a comfortable advantage in space.
[font color="blue"]14...a4?! 15.e4 dxe4 16.fxe4 Nc5 17.Qe3 Ne6 18.Bh6[/font] gives White a significant advantage in space.

15.e4

White occupies the center.

15...dxe4 16.fxe4

As in most variations, White's center pawns are hanging. This will not be a problem as long as they are sufficiently protected, but that takes White's resources for now. Therefore, Black has at least some faint hopes of counterplay.

16...Nc5 17.Qf3 Ne6 18.Be3!?

White should use a more idle piece to reinforce his center.
If [font color="red"]18.Rad1! b4 19.Na4 Kh7 20.Qe3 Nxf4 21.Nxf4[/font] gives White a better center and more freedom.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 18.Bf4e3
[/center]
18...b4!

Black gets some counterplay.

19.Nb1

Somewhat better is [font color="red"]19.Na4! Nh7 20.Bf2[/font] when:

[font color="red"]20...Nf6 21.Qe3 Nd7 22.Nf4 Nxf4 23.Qxf4[/font] gives White a fair advantage in space.
If [font color="darkred"]20...Nhg5?! 21.Qd3![/font] then:

[font color="darkred"]21...Qb8 22.Rad1 Rd8 23.d5 Nf4 24.Nxf4 Qxf4 25.Bb6[/font] gives White a strong initiative.
[font color="magenta"]21...Rb8 22.Rad1 Qd7 23.h4 Nh7 24.d5 cxd5 25.exd5[/font] gives White more power in the center, the initiative and a fair advantage in space.

19...Nh7?!

White wants to bring the Knight to g5, but the Knight at e6 can already go to to g5.
Better is [font color="red"]19...Ne8 20.Nd2 Ng5 21.Bxg5 Bxg5 22.Qd3[/font] limits White to a small advantage with fortified center pawns, which are nevertheless vulnerable; the Knight at e8 is flexible.

20.Nd2!

White has a fair advantage, but his Queen is in an awkward place and his hanging pawns are vulnerable to attacks from the flanks.

20...Rc8

Black indicates a plan of advancing on the queenside, but fails to strike at White vulnerable Queen.
If [font color="red"]20...Nhg5[/font] then:

[font color="red"]21.Qg3! Bd6 22.Qf2 f5 23.e5 Be7 24.h4[/font] gives White the better center and the initiative, but Black has better pawns.
[font color="darkred"]21.Qf2?! f5! 22.e5 Qd5 23.a3 Kg7 24.Rad1 Ne4[/font] gives Black stronger pawns, the initiative and more space; White should play 25.Nxe4 to alleviate his cramped position.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 20...Ra8c8[/center]

21.Rad1?!

White neglects the possible flank advance.
If [font color="red"]21.Rac1! Nhg5[/font] then:

[font color="red"]22.Qg3 Bd6 23.Qf2 f5 24.e5 Be7 25.h4[/font] gives White a small advantage in space while Black has stronger pawns.
If [font color="darkred"]22.Qf2!? f5 23.e5[/font] then:

If [font color="darkred"]23...Qd5! 24.b3 c5[/font] then:

[font color="darkred"]25.Nf4 Nxf4 26.Qxf4 cxd4 27.Qxd4 Qxd4 28.Bxd4 Rfd8[/font] gives Black a small advantage in space.
[font color="darkorange"]25.dxc5 Qxe5 26.c6 Qd5 27.c7 Rxc7 28.Rxc7 Nxc7[/font] gives Black an extra pawn and a small advantage in space.

[font color="magenta"]23...f4!? 24.Bxf4! c5 25.Qg3 cxd4 26.Rxc8 Qxc8 27.Qd3[/font] gives White a small advantage in space.

21...Bh4?!

Black wants to provoke a weakness in White's kingside
Better is [font color="red"]21...Nhg5 22.Qg3 Bd6 23.Bxg5 Nxg5 24.Qf2 Rc7 25.e5[/font] with equality.

22.g3!

White decides he can live with the very weakness Black wanted to provoke.
Also good is [font color="red"]22.Bf2 Nhg5 23.Qe3 Bxf2+ 24.Rxf2 Re8 25.h4[/font] when Black's initiative is repulsed.

22...Bf6 23.Nc4 Bg7 24.b3!

White works on preventing any further encroachment into his position.

24...Qe7 25.Qg2

This move isn't at all bad, but White could have demolished Black's defense here.
If [font color="red"]25.e5! h4 26.Qg2[/font] then:

If [font color="red"]26...hxg3 27.Nd6 Rcd8 28.Qxg3 Nc7 29.Rc1[/font] then:

[font color="red"]29...Nb5 30.Nxb5 cxb5 31.Rc5 Rc8 32.Rfc1[/font] leads to the win of a pawn.
[font color="magenta"]29...Nd5 30.Rxc6 f6 31.Nf4 Nxf4 32.Bxf4 fxe5 33.Bxe5[/font] leaves White with an extra pawn.

[font color="darkred"]26...a4 27.bxa4 hxg3 28.Nxg3 c5 29.d5 Qh4 30.Rc1[/font] gives White two passed pawns while retraining and blockaded Black's queenside.

25...Nc7 26.Nxa5 Rfe8

If [font color="red"]26...Nd5?[/font] then White wins after [font color="red"]27.Bc1! Qe8 28.exd5 cxd5 29.Nf4.[/font]

27.e5 Nd5 28.Bd2 Red8 [28...Qc7 29.Nc4 Rcd8 30.Rf2 Qa7 31.Ra1] 29.Nf4 [29.Nc4 Ra8 30.Ra1 Qa7 31.Rf2 Nf8 32.a4] 29...Qa7?

The Queen abandons the c-pawn, leading to the collapse of Black's game.
[font color="red"]29...Qc7 30.Nc4 Ra8 31.Rf2 Qa7 32.Rdf1 Nf8 33.Qe4[/font] gives White a better center, an extra pawn and more freedom for his minor pieces; Black has a target in White's weak d4 pawn, but White has it sufficiently covered for now

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 29...Qe7a7[/center]

30.Nxc6!!

The sham sacrifice wins material.

30...Rxc6 31.Nxd5 Rc2

If [font color="red"]31...Rxd5[/font] loses quickly after [font color="red"]32.Qxd5 Rc8 33.Bxb4 Ng5 34.Kh1 Ne6 35.a4.[/font]

32.Kh1

[font color="red"]32.Qe4 Rxa2 33.Bf4 Rb2 34.Nxb4 Qd7 35.h4![/font] leaves White two pawns up and Black unable to advance his remaining pawns.

32...Bf8

[font color="red"]32...Rb2 33.Nxb4 Qxd4 34.Bc3 Qxd1 35.Bxb2![/font] leaves White three pawns to the good.

33.e6 Qa8 34.exf7+

White misses a tactical coup.
If [font color="red"]34.e7![/font] then:

[font color="red"]34...Rxd5 35.e8Q Qxe8 36.Qxd5 Rxa2 37.Rde1 Qa8 38.Qxa8[/font] leaves White up by an exchange.
If [font color="darkred"]34...Re8[/font] then White wins after [font color="darkred"]35.exf8Q+ Rxf8 36.Nxb4 Qxg2+ 37.Kxg2.[/font]

34...Kh8

Better, but not good enough to avert loss, is [font color="red"]34...Kg7! 35.Nf4 Qxg2+ 36.Nxg2 Ra8 37.Ne1 Rcxa2 38.Nd3[/font]

35.Nf4! Qxg2+ 36.Kxg2

[font color="red"]36.Nxg2! Kg7 37.Bf4 Be7 38.Be5+ Bf6 39.Nf4 Kxf7 40.Nd3[/font] leaves White two pawns up.

36...Rxd4 37.Rf2 Rd6 38.Bc1!!

This effectively sacrifices a Rook, but wipes away what's left of Black's defense.

38...Rxf2+ 39.Kxf2 Rxd1

Black has nothing better than to take the bait.
If [font color="red"]39...Kg7 40.Rxd6 Bxd6 41.f8Q+ Nxf8 42.Nd3 Nd7 43.Bd2[/font] leaves White with an extra pawn and pressure on Black's b-pawn.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 39...Rd6d1:R[/center]

40.Bb2+!!

Black is doomed. He must give up a piece.

40...Nf6

The text move is forced.
If [font color="red"]40...Bg7[/font] then [font color="red"]41.Nxg6#.[/font]

41.Bxf6+ Kh7 42.Ne6 Bd6 43.Be5!

[font color="red"]43.f8Q? Bxf8 44.Nxf8+ Kg8 45.Be7 Rd2+! 46.Kf1 Rxa2[/font] gives Black slim chances of surviving.

43...Be7

Of course, White's Bishop cannot be taken.

44.f8Q

If [font color="red"]44.Ke2[/font] then White wins after [font color="red"]44...Rd5 45.Bf6! Bd6[/font] (otherwise the pawn queens with impunity) [font color="red"]46.f8Q Bxf8 47.Nxf8+.[/font]

44...Bxf8 45.Nxf8+ Kh6

Black is not going to resign as long as he has a Rook against two minor pieces; a Knight and a Bishop are notoriously hard to coordinate.

46.Ne6?!

White has opened the door wide enough for Black to have some drawing chances.
[font color="red"]46.Ke2 Rg1 47.Ne6 g5 48.Nd4 Rg2+ 49.Kd3[/font] returns the extra pawn, but Black's b-pawn in indefensible.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 46.Nf8d6[/center]

46...g5!

Black's best chance is to create tension with the kingside pawns.
The immediate [font color="red"]46...Rd2+[/font] loses to [font color="red"]47.Ke3 Rxa2 48.Bf4+ Kh7 49.Kd3!.[/font]

47.h4

Better is to prevent the Rook from getting anywhere near e1.
[font color="red"]47.Ke2! Rh1 48.Kf3 Re1 49.Nd8! Rf1+ 50.Ke3[/font] but after [font color="red"]50...Re1+ 51.Kd2 Rh1[/font] White's vicotry remains in doubt.

47...gxh4 48.gxh4 Kg6 49.Nd4

[font color="red"]49.Ke2[/font] drops a pawn to [font color="red"]49...Rg1 50.Nd4 Rg4 51.Nf3 Rg2+.[/font]

49...Rd3 50.Nc6

If [font color="red"]50.Ke2[/font] drops the h-pawn to [font color="red"]50...Rh3 51.Nf3 Kf5 52.Bd6 Kg4 53.Nd2.[/font]

50...Rd2+! 51.Ke3 Rxa2 52.Bd6 Ra1?!

Black has no room for error.
Better is [font color="red"]52...Ra6! 53.Ne7+ Kf7 54.Bxb4 Ra1 55.Nf5 Rh1[/font] when the two minor pieces will have difficulty defending both pawns from the swift Rook,

53.Kd4! Rg1

If [font color="red"]53...Rh1 54.Be7! Rh3[/font] then:

[font color="red"]55.Ne5+ Kf5 56.Nd3 Rg3 57.Bg5 Rg4+ 58.Kc5[/font] still leaves White's win problematic.
[font color="darkred"]55.Nxb4? Rxb3 56.Ke5 Re3+! 57.Kd6 Rxe7 58.Kxe7[/font] is probably drawn.

54.Kc5 Kf5?

Black succumbs yet again.
Slightly better is [font color="red"]54...Rc1+ 55.Kd5 Rh1 56.Be7 Rh3 57.Nd4 Kf7 58.Bg5[/font] when 58...Rc3 is good enough to keep Black's faint hopes of alvaging a half point alive.

[center]BLACK: Levon Aronian[/center]

[center][/center]

[center]WHITE: Magnus Carlsen[/center][center]Position after 54...Kg6f5[/center]

55.Nxb4!

The pawn falls and the game falls with it.

55...Rc1+ 56.Kd4 Re1 57.Nc6 Re4+

If [font color="red"]57...Rd1+ 58.Kc5[/font] then:

[font color="red"]58...Ke6[/font] then White wins after [font color="red"]59.Nd4+ Kd7 60.b4 Rc1+ 61.Kd5.[/font]
[font color="darkred"]58...Ke4[/font] then White wins after [font color="darkred"]59.Be7 Rc1+ 60.Kd6 Rd1+ 61.Ke6.[/font]

58.Kd5! Rxh4 59.b4 Rh1 60.b5 Rb1 61.Nd4+!

White mus till take care.
If [font color="red"]61.Nb4?[/font] then:

[font color="red"]61...Rd1+! 62.Kc6 Ke6 63.Bc5 h4 64.b6 h3 65.b7[/font] leaves White's win in doubt as both sides queen.
If [font color="darkred"]61...h4?[/font] then White wins after [font color="darkred"]62.b6 Rd1+ 63.Kc5 Rc1+ 64.Kb5 Rc8 65.b7[/font]

61...Kg4 62.Kc6 Rc1+ 63.Kd7 Rb1 64.Kc7 h4 65.b6!

It will now cost Black his Rook to stop White's pawn.

65...Kh3 66.b7 Kg2

Black is hoping for a draw after [font color="red"]67.h8Q?? Rxh8 68.Kxh8 h3[/font] when:

Black draws after [font color="red"]69.Ne6 h2 70.Bxh2 Kxh2.[/font]
Black also draws after [font color="darkred"]69.Nf5 h2 70,Ne3+ Kf3! 71.Bxh2 Kxe3.[/font]

67.Nf5!!

OK, forget about that.

67...h3

There is no defense.
If [font color="red"]67...Kh3[/font] then White wins after [font color="red"]68.Kc8 Rb5 69.Be7 Kg4 70.Nxh4.[/font]
If [font color="blue"]67...Rc1+ 68.Kd7 Rb1 69.b8Q Rxb8 70.Bxb8[/font] then:

If [font color="blue"]70...h3 71.Nh4+ Kg1 72.Ke6 Kf2 73.Kf5 Kf1 74.Kg4[/font] wins the pawn.
If [font color="darkblue"]70...Kh3[/font] then:

[font color="darkblue"]71.Ke6 Kg4 72.Bd6 Kh3 73.Be7[/font] wins the pawn.
Disatrous is [font color="dodgerblue"]71.Ne3??[/font] stalemate!

68.Nh4+ 1-0

If [font color="red"]68...Kg1[/font] then after [font color="red"]69.Kc6 Rb2 70.b8Q Rxb8 71.Bxb8 h2 72.Nf3+ Kh1 73.Nxh2[/font] White mates with Bishop and Knight.
Paron Aronian resigns.

Jack Rabbit

(45,984 posts)

8. Topalov - Caruana, Group A, Round 10

Reply to Jack Rabbit (Reply #2)

Fri Feb 24, 2012, 12:03 AM

Feb 2012

Last edited Fri Feb 24, 2012, 05:37 AM - Edit history (1)

[center][/center]

[center]Fabiano Caruana[/center]
[font size="1"]Photo by http://www.flickr.com/people/39649493@N00 Ted Cross from http://www.flickr.com/photos/39649493@N00/2307926939 flickr (http://creativecommons.org/licenses/by/2.0/deed.en Creative Commons License, Attribution/Share Alike)
[/font]

Veselin Topalov - Fabiano Caruana
http://www.chessgames.com/perl/chessgame?gid=1654445
Tata Steel Chess Tournament (Group A), Round 10
Wijk aan Zee, 25 January 2012

Open Norman Sicilian Game: Kan Defense (Polugaevsky Opening)

1.Nf3 c5 2.e4 e6

For an explanation of this move, see Gashimov-Radjabov, below.

3.d4 cxd4 4.Nxd4 a6

The idea of this move, as it is in other Open Sicilians that feature it, is to deprive White of use of the b5 square.

5.Bd3

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center]
[center]Open Norman Sicilian Game: Kan Defense (Polugaevsky Opening)[/center][center]Position after 5.Bf1d3[/center]

This is the Polugaevsky Opening. For this and other variations of the Kan Defense, see Munguntuul-Koneru, Grand Prix W, Rd 2, Nalchik, 2010.

5...Nf6 6.0-0 e5

If [font color="red"]6...Qc7[/font] then:

If [font color="red"]7.Nd2 Nc6 8.Nxc6[/font] then:

If [font color="red"]8...bxc6 9.f4[/font] then:

If [font color="red"]9...Bc5+ 10.Kh1 d6[/font] then:

If [font color="red"]11.Nf3 e5 12.fxe5 dxe5[/font] then:

If [font color="red"]13.Nh4 0-0 14.Nf5 Be6 15.Qe2[/font] then:

If [font color="red"]15...a5 16.Bc4 Kh8 17.Bg5[/font] then:

If [font color="red"]17...Nd7!? 18.Rad1[/font] then:

If [font color="red"]18...Nb6? 19.Nxg7!![/font] then:

[font color="red"]19...Bxc4 20.Bf6 Be7 21.Qf3[/font] Black resigns (Stein-Portisch, ITZ, Stockholm, 1962).
[font color="darkorange"]19...Be7 20.Nxe6 fxe6 21.Bd2 Rxf1+ 22.Rxf1 Nxc4 23.Qxc4.[/font]
If [font color="purple"]19...Kxg7[/font] then after [font color="red"]20.Bf6+ Kg6 21.Bxe6 fxe6 22.Qg4+[/font] White soon delivers mate.

[font color="hotpink"]18...Bxf5 19.exf5 f6 20.Bd2 Rfb8 21.Bc1 Nb6 22.Be6[/font] still leaves White with a substantial advantage.

[font color="darkpink"]17...Bxf5 18.Rxf5 Ne8 19.Rf3 Be7 20.Be3[/font] continues to give White a small advantage.

If [font color="darkred"]15...Rab8[/font] then:

[font color="darkred"]16.Bxa6! Qa7 17.Bd3 Qd7 18.a4 g6 19.Nh6+[/font] gives White an extra pawn, a remote passer and fewer pawn weaknesses; Black has more space.
[font color="magenta"]16.Qf3!? Bxf5 17.Qxf5 a5 18.Rb1 Rfd8 19.Bh6 Ne8[/font] gives White a narrow advantage.

[font color="burgundy"]13.Qe1 0-0 14.Bg5 Rb8 15.Bxf6 gxf6 16.b3[/font] gives Black a transient advantage in space; White will soon be able to exploit Black's weak pawns and his problem with King safety.

[font color="darkpink"]11.Qe2 Nd7 12.f5 Ne5 13.Nc4 exf5 14.exf5[/font] gives White a small advantage in space.

If [font color="darkred"]9...d5[/font] then:

If [font color="darkred"]10.Qe2 Be7 11.b3[/font] then:

If [font color="darkred"]11...0-0 12.Bb2 a5 13.Rf3[/font] then:

[font color="darkred"]13...Ba6!? 14.c3! Rfe8 15.Raf1 g6 16.Kh1 a4 17.Rh3[/font] gives White a small advantage in space (Karpov-Visier Segovia, Ol, Skopje, 1972).
[font color="purple"]13...a4 14.Kh1 axb3 15.axb3 Bd7 16.e5 Rxa1+ 17.Bxa1[/font] is equal.

[font color="darkorange"]11...Bb7 12.Bb2 0-0-0 13.Kh1 Qb6 14.exd5 cxd5 15.c4[/font] gives White a small advantage in space (Z. Almasi-Kogan, Rpd, Corsica, 2005).

[font color="magenta"]10.b3 Be7 11.Bb2 a5 12.c4 0-0 13.Qc2 h6[/font] is equal (Tukmakov-Karpov, Soviet Ch, Moscow, 1973).

If [font color="darkred"]8...dxc6 9.f4 e5[/font] then:

If [font color="darkred"]10.Nc4 Ng4 11.Qf3 Bc5+ 12.Kh1[/font] then:

[font color="darkred"]12...Be6 13.fxe5 0-0-0 14.Bf4 h5 15.c3 Kb8[/font] gives Black a small advantage in space (Sandipan-Miezes, Op, Dhaka, Bangladesh, 2001).
[font color="darkorange"]12...b5 13.Nxe5 Nxe5 14.fxe5 0-0 15.Bf4 Be6 16.Qg3[/font] gives White more activity (Keres-Gaprindashvili, IT, Hastings, 1965).

[font color="magenta"]10.f5 h5 11.Nb3 b6 12.Bg5 Bb7 13.Qe2[/font] gives White a small advantage in space (Arakhamia-Miezes, EU Ch, Liverpool, 2008).

If [font color="darkred"]a) 7.Qe2 d6[/font] then:

If [font color="darkred"]8.c4 8...g6 9.Nc3 Bg7 10.Nf3 0-0 11.Rd1[/font] then:

If [font color="darkred"]11...Nc6 12.h3 Nd7 13.Be3[/font] then:

If [font color="darkred"]13...Bxc3 14.bxc3 f6[/font] then:

If [font color="darkred"]15.Qd2 Rd8 16.Bc2 Nc5 17.Nd4 Na5 18.Qe2 e5[/font] gives Black stronger pawns, the initiative and a slight edge in space (Leko-Ivanchuk, Rpd Match, Mukachevo, 2007).
[font color="burgundy"]15.Bc2 Nd8 16.Rd2 Nf7 17.Rad1 Nc5 18.Nh2 e5[/font] is equal (Shabalov-Stripunsky, Op, Philadelphia, 2010).

[font color="magenta"]13...b6 14.Rac1 Bb7 15.Bb1 Nc5[/font] then:

If [font color="magenta"]16.Qd2 Rad8[/font] then:

[font color="magenta"]17.Nd5 exd5 18.cxd5 Qe7 19.dxc6 Bxc6 20.Bg5[/font] gives White at least the exchange (Ganguly-Flores, Op, Moncada, Spain, 2009).
[font color="purple"]17.Bh6 f5 18.exf5 gxf5 19.Bg5 Bf6 20.Bh6 Bg7[/font] is equal (Lintchevski-Shimanov, Russian ChU20, St. Petersburg, 2008).

[font color="darkorange"]16.Bf4 Rad8 17.Qe3 Ne5 18.Nxe5 dxe5 19.Bg5 f6[/font] gives Black stronger pawns, a remote pawn majority and more space (Winge-Barten, Corres, 1999).

If [font color="magenta"]11...Nbd7[/font] then:

If [font color="magenta"]12.Bf4[/font] then:

If [font color="magenta"]12...Ng4 13.Rac1 Nge5 14.b3[/font] then:

If [font color="magenta"]14...b6 15.Bb1[/font] then:

If [font color="magenta"]15...Nxf3+ 16.Qxf3 Ne5[/font] then:

If [font color="magenta"]17.Qe2 Bb7[/font] then:

[font color="magenta"]18.Be3 Rfd8 19.f4 Nd7 20.Qf2 Rac8 21.Ne2 Re8[/font] is equal (Panchanathan-Moradiabadi, Asian ChU20, Tehran, 2001).
[font color="purple"]12...Nh5 13.Be3 b6 14.Rac1 Bb7 15.b3 Nhf6 16.Bb1[/font] gives White a small advantage in space (Tidman-Bellin, 4NCL, Birmingham, 2001).

[font color="hotpink"]14...Nxf3+ 15.Qxf3 Ne5 16.Qe3 Bd7 17.Be2 Rfd8 18.Bh6[/font] gives White more space (Sriram-Vaida, Op, Calcutta, 2000).

[font color="burgundy"]15...Re8 16.Nxe5 Nxe5 17.Qd2 Bf8 18.h3 Rb8 19.Bg5[/font] gives White a fair advantage in space (Kotronias-Siebrecht, Euro Ch, Warsaw, 2005).

[font color="darkpink"]17.Qe3 Rb8 18.Bh6 Bb7 19.Bxg7 Kxg7 20.Ne2[/font] is equal (G. Xie-Moradiabadi, World Jr Ch, Istanbul, 2005).

[font color="darkorchid"]18.Qd2 Rfd8 19.Bg5 f6 20.Be3 Rab8 21.h3[/font] gives White a substantial advantage in space (Petithory-J. Edwards, Corres, 1991).

If [font color="darkorange"]12.h3 b6 13.Bf4[/font] then:

If [font color="darkorange"]13...Nh5 14.Bd2 Bb7 15.Rac1 Rac8[/font] then:

[font color="darkorange"]16.b3 Qb8 17.Bb1 Rfd8 18.Bg5 Bf6 19.Qd2[/font] gives White a small advantage in space (van Blitterswijk-Istratescu, IT C, Wijk aan Zee, 2002).
[font color="purple"]16.g4 Nhf6 17.Bf4 Rfd8 18.b3 Qb8 19.Bb1[/font] is equal (Smirnov-Kosov, Moscow Op, 2007).

[font color="hotpink"]13...Bb7 14.Rac1 Ne5 15.Be3 Rac8 16.Nxe5 dxe5 17.Na4[/font] gives White a distant pawn majortity, stronger pawns and a sustantial advantage in space (Svetushkin-Gunawan, Ol, Istanbul, 2000).

If [font color="magenta"]8.f4 Nbd7 9.c4 Be7 10.Nc3 0-0 11.Kh1[/font] then:

If [font color="magenta"]11...b6 12.Bd2 Bb7 13.Rae1[/font] then:

If [font color="magenta"]13...Rad8 14.Nf3[/font] then:

[font color="magenta"]14...Qb8 15.b4 g6 16.Ng5 Rfe8 17.Bc2 Nh5 18.Qg4[/font] is equal (Timofeev-Zhou Jianchao, Rpd TM, Ningbo, 2010).
If [font color="darkorange"]14...Rfe8 15.e5 dxe5 16.fxe5 Ng4 17.Bf4[/font] then:

[font color="darkorange"]17...f6? 18.exf6! Qxf4 19.f7+ Qxf7 20.Ng5 Bxg5 21.Rxf7 Kxf7 22.Qxg4 Bf6[/font] Black resigns without waiting for White to reply (Fedorchuk-van Elst, Op, Marseille, 2006).
[font color="purple"]17...Nc5! 18.Bc2 f5 19.Rd1 Rxd1 20.Rxd1 Rd8 21.Rxd8+ Qxd8[/font] is equal.

If [font color="darkorange"]13...Rfd8 14.Nf3[/font] then:

[font color="darkorange"]14...g6 15.Ng5 h6 16.Nf3 Bf8 17.Rc1 Bg7 18.Bb1[/font] is equal (Kudrin-Dzindzichashvili, Op, Philadelphia, 1992).
[font color="purple"]14...Rac8 15.e5 Ne8 16.Ne4 Nc5 17.Nxc5 bxc5 18.f5[/font] gives White an impressive advantage in space (Lederle-Mertens, German Ch, Bonn, 2011).

If [font color="darkorange"]11...Re8 12.Bd2[/font] then:

If [font color="darkorange"]12...b6 13.Rae1 Bb7[/font] then:

[font color="darkorange"]14.b4 Rad8 15.f5 Bf8 16.fxe6 fxe6 17.Bg5[/font] gives White a fair advantage in space (Bluvshtein-Spraggett, Canadian Ch, Toronto, 2004).
[font color="purple"]14.Bb1 Rad8 15.b3 Bf8 16.Qf3 g6 17.Qh3 Bg7[/font] is equal (Milos-Milman, Pan-American Ch, Buenos Aires, 2005).

[font color="hotpink"]12...g6 13.Nf3 Bf8 14.e5 Nh5 15.g4 Ng7 16.Ne4[/font] gives White an overwhelming advantage in space (Basagic-Kutsankov, Euro Club Cup, Saint Vincent, 2005).

If [font color="darkred"]b) 7.Nc3[/font] then:

If [font color="darkred"]7...Bc5 8.Nb3 Be7 9.f4 d6[/font] then:

If [font color="darkred"]10.a4 Nc6[/font] then:

If [font color="darkred"]11.Be3 b6 12.Be2 0-0 13.Bf3[/font] then:

If [font color="darkred"]13...Bb7 14.Qe2 Rfe8[/font] then:

If [font color="darkred"]15.Kh1 Nd7 16.Rad1[/font] then:

If [font color="darkred"]16...Rac8 17.Qf2[/font] then:

[font color="darkred"]17...Bf8 18.Qg3 Nc5 19.Nxc5 bxc5 20.Rd2 Rcd8 21.Rfd1 Nb4[/font] is equal (Mogranzini-Arlandi, Ol, Turino, 2006).
[font color="burgundy"]17...Nc5 18.Nxc5 bxc5 19.Ne2 Bf8 20.c4 Rb8[/font] gives Black more freedom (Chau-Chakravarthy, World Youth, Belfort, 2005).

[font color="darkpink"]16...Nc5 17.Qf2 Bf8 18.h3 Rac8 19.Rd2 Rcd8 20.Rfd1[/font] gives White a slim advantage in space (Smyslov-Radulov, IT, Leningrad, 1977).

If [font color="magenta"]15.Rad1[/font] then:

If [font color="magenta"]15...Bf8 16.Qf2 Nd7 17.Kh1 Rab8[/font] then:

[font color="magenta"]18.Nc1 Ba8 19.Qe2 Qc8 20.N1a2 Nf6 21.Nc1 e5[/font] is equal (Radjabov-Stellwagen, IT A, Wijk aan Zee, 2009).
[font color="darkorange"]15...Rac8 16.Rd2 Nb4 17.Rfd1 Red8 18.Qf2 Nd7 19.Nd4[/font] is equal (Titova-Kierzek, OlW, Elista, 1998).

[font color="purple"]18.Be2 Nc5 19.Rd2 Nb4 20.Bf3 Ba8 21.Rfd1[/font] gives White a slight advantage in space (Bourne-Truman, British Ch, West Browich, 2003).

If [font color="magenta"]13...Rb8 14.Qe2[/font] then:

If [font color="magenta"]14...Na5 15.Nd2 Bb7 16.g4[/font] then:

[font color="magenta"]16...Nd7 17.g5 Rfe8 18.Qf2 Nc4 19.Nxc4 Qxc4 20.Rad1[/font] is equal (Ciocaltea-Tringov, IT, Nis, 1981).
[font color="burgundy"]16...Rfc8 17.Qg2 Nd7 18.g5 Nc4 19.Nxc4 Qxc4 20.h4[/font] is equal (Fichtl-Jansa, Czechoslovakian Ch, Rimavska Sobota, 1974).

If [font color="darkorange"]14...Bb7[/font] then:

[font color="darkorange"]15.Qf2 Ba8 16.Rfd1 Nb4 17.Rd2 Nd7 18.a5 b5 19.Rad1[/font] gives White a small advantage in space (Keogh-Stahlberg, Ol, Tel Aviv, 1964).
[font color="purple"]15.g4 Rfe8 16.g5 Nd7 17.Bg2 Bf8 18.Rf3 Na5 19.Rh3[/font] gives White more space, but no way to use it (Ivanovic-Ribli, IT, Bugojno, 1984).

If [font color="magenta"]11.a5 b5 12.axb6 Qxb6+ 13.Kh1[/font] then:

If [font color="magenta"]13...0-0[/font] then:

If [font color="magenta"]14.Qe2 Nb4 15.Be3 Qb8 16.Na5[/font] then:

[font color="magenta"]16...Bd7 17.Nc4 Nxd3 18.Qxd3 Bb5 19.Nxb5 axb5[/font] gives Black the initiative; White has more space, but Black can close the gap with moves such as ...Rd8, ...Qb7 and ...d5 (Panjwani-Arencibia, Op, Kitchner, Ontario, 2006).
[font color="burgundy"]16...Qc7 17.Bf2 Bd7 18.Bc4 Bb5 19.Rfc1 Bxc4 20.Qxc4[/font] is equal (Navara-Grischuk, Grnad Prix, Sochi, 2008).

If [font color="darkorange"]14.Qf3 Nb4 15.Be3 Qc7[/font] then:

[font color="darkorange"]16.e5 Bb7 17.Qh3 dxe5 18.fxe5 Qxe5 19.Ra5[/font] gives White a slight advantage (Timman-Kurajica, IT 8485, Reggio Emilia, 1984).
[font color="purple"]16.Bd4 Bb7 17.Na5 Rab8 18.Nxb7 Qxb7 19.Qh3 h6 20.Qg3[/font] draw (Ponomariov-Ivanchuk, Russian ChT, Sochi, 2006).

[font color="darkorchid"]13...Nb4 14.Na5 d5 15.e5 Nd7 16.Rf3 Nxd3 17.cxd3[/font] gives White a small advantage in space (Smirin-Maryasin, Soviet ChT, Nabereznye Chelny, 1988).

If [font color="magenta"]10.Qf3[/font] then:

If [font color="magenta"]10...Nbd7 11.Bd2 b6[/font] then:

If [font color="magenta"]12.Rae1 Bb7 13.Kh1 g6[/font] then:

[font color="magenta"]14.Qh3 h5 15.Nd1 0-0-0 16.Nf2 h4 17.a4 Nh5[/font] gives White more space and Black more freedom (Bartel-Goloshchapov, Aeroflot Op, Moscow, 2002).
[font color="burgundy"]14.Nd1 0-0 15.Qh3 Rfe8 16.Nf2 Bf8[/font] gives White more space, but Black's "little center" prevents her from exploitiong it (Zozulia-N. Mamedov, Op, Dubai 2011).

If [font color="darkorange"]12.Qg3 g6 13.Rae1 Bb7 14.Kh1[/font] then:

[font color="darkorange"]14...0-0-0 15.e5 Nh5 16.Qe3 Kb8 17.exd6 Bxd6 18.Ne4[/font] gives White a small advantage in space (Kristjansson-Markus, Op, Reykjavik, 2004).
[font color="purple"]14...e5 15.fxe5 Nxe5 16.Bg5 Nh5 17.Qh4[/font] is equal (Matulovic-Pikula, Yugoslav ChT, Vrnjacka Banja, 1998).

If [font color="darkorange"]10...Nc6 11.Be3 0-0[/font] then:

If [font color="darkorange"]12.Rae1 b5[/font] then:

If [font color="darkorange"]13.e5 dxe5 14.fxe5 Nd7 15.Bf4[/font] then:

If [font color="darkorange"]15...Bb7 16.Qg3[/font] then:

[font color="darkorange"]16...g6 17.Kh1 Rac8 18.a3 Ba8 19.Nd1 Qd8 20.Nf2[/font] gives White more space and Black stronger pawns (Goerlinger-Smithers, Corres, 2001).
[font color="darkpink"]16...Nb4?! 17.Bh6! g6 18.Be4 Nc6 19.Bxf8 Rxf8 20.Bxc6 Bxc6 21.Kh1[/font] gives White a substantial advantage in space; Black has stronger pawns, but is in no position to exploit the isolated pawn on e5 (Li Shilong-Bischoff, IT C, Wijk aan Zee, 2006).

If [font color="hotpink"]15...b4 16.Nd1 Bb7 17.Qg3[/font] then:

[font color="hotpink"]17...g6 18.Nf2 Qd8 19.Qh3 h5 20.Re3 Kg7 21.Be4[/font] gives White a fair advantage in space; Black has stronger pawns and may be able to eliminate the pawn at e5 (Lutz-Smirin, Euro Ch, Saint Vincent, Italy, 2000).
[font color="purple"]17...Rfd8 18.Ne3 Nf8 19.Nc4 Ng6 20.Bxg6 hxg6 21.Nd6[/font] gives White gives White an impressive advantage in space; Black has stronger pawns, but the pawn at e5 keeps Black's position cramped (Ganguly-Ramesh, Inadian Ch, Mumbai, 2003).

If [font color="hotpink"]13.g4 Nd7 14.g5 Bb7[/font] then:

If [font color="hotpink"]15.Qh3 Nb4 16.f5 exf5 17.exf5 Nxd3 18.cxd3[/font] then:

[font color="hotpink"]18...Rfe8 (19.Nd4[/font] is equal (Sanz Alonso-Andrade, Portuguese ChT, Barreiro, 2001).
[font color="burgundy"]18...Ne5 19.d4 Nc4 20.g6 fxg6 21.fxg6 hxg6 22.Qe6+ Kh7[/font] draw (Lovik-van Eyck, Op, Gibraltar, 2009).

[font color="darkpink"]15.Qh5 Nb4 16.Rf3 Nxd3 17.cxd3 Rfe8 18.Ref1 g6[/font] is equal (Dr. Nunn-Grivas, Match, Athens, 1991).

[font color="purple"]12.a3 b5 13.Kh1 b4 14.axb4 Nxb4[/font] transposes into [font color="darkorange"]Timman-Kurajica,[/font] above.

If [font color="magenta"]b1) 7...Nc6 8.Be3[/font] then:

If [font color="magenta"]8...Ne5[/font] then:

If [font color="magenta"]9.h3 Bc5[/font] then:

If [font color="magenta"]10.Kh1 d6 11.f4 Ng6 12.Qe1[/font] then:

If [font color="magenta"]12...0-0 13.f5 Ne5[/font] then:

If [font color="magenta"]14.Qh4?![/font] then:

If [font color="magenta"]14...b5!? 15.Rf3[/font] then:

If [font color="magenta"]15...exf5! 16.exf5 Nxf3 17.gxf3 Bb7 18.Rg1 Bxf3+[/font] then:

If [font color="magenta"]19.Kh2 Qe7[/font] then:

[font color="magenta"]20.Qg3 Qe5 21.Bf4 Ng4+ 22.hxg4 Qxd4 23.Re1 Bc6[/font] gives Black an extra pawn and domination of the board (Bromberger-Vehi Bach, Euro Ch, Dresden, 2007).
If [font color="burgundy"]20.Qg5[/font] then after [font color="burgundy"]120...Qe5+ 21.Rg3 g6 22.Bf4 Qxd4 23.Rxf3 Rae8[/font] Black wins (B. G. Smith-Konguvel, Op, Rethymnon, 2009).

[font color="darkpink"]19.Nxf3 Bxe3 20.Qxf6 Bxg1 21.Qg5 Qc6 22.Ne4 f6[/font] give Black an extra pawn (Carlsen-Vachier Lagrave, Rpd IT, Cap d'Adge, 2006).

If [font color="darkorange"]15...Nxf3?! 16.gxf3 Ne8[/font] then:

If [font color="darkorange"]17.Rg1[/font] then:

[font color="darkorange"]17...g6 18.Rg4 Qb7 19.Qh6 e5 20.Nd5 Bxd4 21.Bxd4[/font] gives White a small advantage in space (García-Vescovi, Pan-American Ch, Cali, Colombia, 2001).
[font color="purple"]17...Qb7 18.fxe6 fxe6 19.e5 g6 20.Bxg6 hxg6 21.Rxg6+[/font] is equal.

[font color="darkpink"]17.e5?! g6! 18.Rg1 d5 19.fxg6 fxg6 20.Bxg6 hxg6 21.Rxg6+ Ng7[/font] gives Black a Rook against two pawns (Tisser-Stefansson, Ol, Istanbul, 2000).

If [font color="darkorange"]14...Bd7[/font] (Black has a small advantage in space) then:

If [font color="darkorange"]15.Rf3?! Nxf3!? 16.gxf3 Qd8[/font] then:

If [font color="darkorange"]17.e5? dxe5[/font] then:

[font color="darkorange"]18.Rg1 exf5 19.Rxg7+ Kxg7 20.Bh6+[/font] is an easy win for Black (Harutjunyan-Aroshidze, Op, Tbilisi, 2007).
If [font color="burgundy"]18.Nxe6[/font] then Black wins after [font color="burgundy"]18..fxe6 19.Bxc5 exf5!! 20.Bxf8 Qxf8 21.Kg2 Rc8.[/font]

[font color="hotpink"]17.Rg1! Kh8 18.fxe6 fxe6 19.e5 dxe5 20.Ne4 Rf7[/font] gives White an extra pawn and Black more space (Haznedaroglu-Iotov, Euro Ch, Antalya, Turkey, 2004).

[font color="purple"]15.fxe6!? fxe6 16.Nce2 Nxd3 17.cxd3 e5 18.Nc2 Rac8[/font] gives Black a fair advantage.
[font color="hotpink"]15.Rab1 b5 16.a3 Qb6 17.Qf2 Nc4 18.Bxc4 bxc4[/font] continues to give Black a small advantage.

[font color="darkpink"]14.Qg3 Nxd3 15.fxe6 Nxb2 16.Rxf6 fxe6 17.Rxf8+ Kxf8 18.Rf1+[/font] remains equal.

If [font color="darkorange"]12...Bd7 13.f5 Ne5[/font] then:

If [font color="darkorange"]14.Qh4 Qb6 15.Nce2 0-0-0[/font] then:

[font color="darkorange"]16.b4 Qxb4 17.Rab1 Qa4 18.Rb3 Nxd3 19.cxd3 e5[/font] is equal (Stoumbos-Javakhishvili, Anibal Op, Linares, 2005).
[font color="purple"]16.Bg1 exf5 17.b4 Qxb4 18.Rab1 Qa4 19.exf5 Rhe8[/font] (Haznedaroglu-Ribli, Euro Club Cup, Saint Vincent, 2005).

[font color="hotpink"]14.Qg3 0-0 15.Nce2 Nxd3 16.cxd3 e5 17.Bh6[/font] gives White a small advantage in space (Fedorov-A. Mastrovasilios, Euro Ch, Kusadasi, Turkey, 2006).

If [font color="darkorange"]10.Qe2 d6 11.f4 Ng6 12.Nb3 Bxe3+ 13.Qxe3 0-0 14.Rae1 b5[/font] then:

If [font color="darkorange"]15.e5 dxe5[/font] then:

If [font color="darkorange"]16.Bxg6 hxg6 17.Qxe5[/font] then:

[font color="darkorange"]17...Qa7+ 18.Kh2 Bb7 19.Nc5 b4 20.Nxb7 bxc3 21.Nd6 cxb2[/font] gives Black a fair advantage with lines of attack leading to the enemy King or to loose White pieces (Hennings-Hort, Capablanca Mem, Havana, 1971).
[font color="burgundy"]17...Qb6+ 18.Qc5 Qxc5+ 19.Nxc5 b4 20.N3e4 Ra7 21.c4[/font] is equal (U. Andersson-Bukic, Euro ChT, Debrecen, 1970).

If [font color="darkpink"]16.fxe5 Nd7 17.Bxg6 hxg6 18.Nd4 Bb7[/font] then:

If [font color="darkpink"]19.Nd1 Rad8 20.c3 Nb6[/font] then:

[font color="darkpink"]21.Nf2 Nc4 22.Qg5 Rd5 23.Ng4 Qd8 24.Nf6+ gxf6 25.Rxf6 Rxd4 26.Rxg6+[/font] draw (Radulov-Suetin, IT, Budapest, 1970).
[font color="#CAACDC"]21.a3!? Nc4! 22.Qf2 Qc5 23.b4 Qe7 24.Qf4 Nxa3[/font] gives Black a comfortable advantage in space (Furhoff-Divljan, IM Trmt, Belgrade, 2001).

[font color="#87095D"]19.a4 b4 20.Na2 a5 21.c3 b3 22.Nc1 Nc5[/font] is equal (Radulov-Marjanovic, IT, Belgrade, 1982).

[font color="purple"]15.a3 Bb7 16.Kh1 Rac8 17.Nd4 Rfe8 18.e5 Nd5[/font] is equal (Mecking-Juarez, IT, Mar del Plata, 1971).

If [font color="darkorange"]9.Nf3 Nfg4[/font] then:

If [font color="darkorange"]10.Nxe5 Nxe3 11.Qh5 g6 12.Qf3 Qxe5 13.fxe3[/font] then:

If [font color="darkorange"]13...f6 14.Qxf6 Qxf6 15.Rxf6 Bg7[/font] then:

If [font color="darkorange"]16.Rf3 b5 17.Raf1 Ra7[/font] then:

[font color="darkorange"]18.Nd1 d6 19.b3 Rf8 20.Rxf8+ Bxf8 21.Nf2 Bg7[/font] is equal (Kuling-op den Kelder, Dutch Jr Ch, Venlo, 2007).
[font color="burgundy"]18.Rf7 Be5 19.a4 Bxc3 20.bxc3 bxa4 21.e5[/font] gives White command of the f-file and greater mobility (Shenkeveld-op den Kelder, Op, Dieren, 2007).

[font color="darkpink"]16.Rf2 b6 17.Rb1 Bb7 18.Na4 b5 19.Nb6[/font] gives White a small advantage in space (Hector-Stellwagen, IT, Malmö, 2006).

[font color="hotpink"]13...Bd6 14.Qxf7+ Kd8 15.g3 b5 16.a4 b4 17.Ne2[/font] gives White a small advantage (S. Petersen-Kristjansson, Euro Club Cup, Antalya, 2007).

If [font color="purple"]10.Bf4 Bd6 11.Bg3 Nxf3+ 12.Qxf3[/font] then:

[font color="purple"]12...Nxh2 13.Bxh2 Bxh2+ 14.Kh1 Be5 15.Qe3 b5[/font] gives Black a better center; White has a slighty advantage in space (Saulin-Zemerov, Op, Tula, Russia, 2001).
[font color="hotpink"]12...Bxg3 13.hxg3 Ne5 14.Qh5 d6 15.Be2 b5 16.a3[/font] is equal (Areshchenko-Bryzgalin, Op, St. Petersburg, 2003).

If [font color="darkorange"]b11) 8...b5 9.Nxc6[/font] then:

If [font color="darkorange"]9...Qxc6 10.a3 Bb7 11.Qe2[/font] then:

If [font color="darkorange"]11...Be7 12.f4 0-0 13.e5[/font] then:

If [font color="darkorange"]13...Nd5 14.Nxd5 Qxd5[/font] then:

If [font color="darkorange"]15.c4 bxc4 16.Bxc4 Qc6[/font] then:

[font color="darkorange"]17.Rac1 Bc5 18.Bxc5 Qxc5+ 19.Qf2 Qxf2+ 20.Rxf2[/font] gives White a fair advantage in space (Landa-Tregubov, Russian Ch HL, Novokuznetsk, 2008).
[font color="burgundy"]17.b4 d6 18.exd6 Bxd6 19.Rac1 Rad8 20.Bb3[/font] gives White a slight initiative and more space (Kotronias-Rublevsky, Euro Ch, Istanbul, 2003).

[font color="darkpink"]15.Rad1 Qc6 16.f5 f6 17.c4 Bc5 18.Bxc5 Qxc5+ 19.Kh1[/font] gives White a slight advantage in space (Gligoric-Casabella, IT, Santa Fe, Argentina. 1960).

If [font color="purple"]13...Ne8[/font] then:

If [font color="purple"]14.Rad1 d6 15.Ne4 Rd8 16.Ng5 g6[/font] then:

If [font color="purple"]17.f5?![/font] then:

[font color="purple"]17...exf5?! 18.e6 f6 19.Nf7 Rc8 20.Rd2 Ng7 21.Nh6+[/font] is equal (Kotronias-Benjamin, EU Ch, Cork, Ireland, 2005).
[font color="darkpink"]17...gxf5! 18.exd6 Bxd6 19.Kh1 Ng7[/font] continues to give Black a fair advantage.

[font color="burgundy"]17.Qf2 Ng7 18.Be4 d5 19.Bd3[/font] continues to give White a small advantage in space.

[font color="hotpink"]14.f5 exf5 15.Bxf5 d5 16.Rad1 Rd8 17.Bd4 Nc7[/font] gives White a small advantage in space (Nicevski-Janosevic, IT, Skopje/Ohrid, 1968).

If [font color="purple"]11...h5[/font] then:

If [font color="purple"]12.h3 Rc8 13.f4 h4 14.Rf3[/font] then:

[font color="purple"]14...Nh5 15.Qf2 Be7 16.f5 e5 17.Nd5 Bd8 18.a4[/font] gives White a fair advantage in space (Kotronias-al Modiaki, Ol, Istanbul, 2000).
[font color="darkpink"]14...Bc5 15.Qf2 Qb6 16.Re1 d6 17.Bxc5 Qxc5 18.Rfe3[/font] is equal (Nedev-Banikas, Ol. Bled, 2002).

If [font color="hotpink"]12.f3[/font] then:

[font color="hotpink"]12...Bc5 13.Qf2 d6 14.Ne2 Bxe3 15.Qxe3 Qc5 16.Nd4[/font] gives White a small advantage in space (Dembo-Skripchenko, Euro ChW, Chisinau, Moldova, 2005).
[font color="darkpink"]12...Qc7 13.a4 b4 14.Na2 Bd6 15.h3[/font] is equal (Madl-Paridar, Mindsports Rpd, Beijing, 2008).

If [font color="purple"]9...dxc6[/font] then:

If [font color="purple"]10.f4 e5 11.f5 Bb7 12.a4[/font] then:

[font color="purple"]12...b4 13.Nb1 c5 14.Nd2 c4 15.Nxc4 Nxe4 16.Qe2 Nc5 17.Bxc5 Bxc5+ 18.Kh1 f6 19.Be4[/font] draw (Klinger-Cvitan, Rubinstein Mem, Polanica Zdroj, 1985).
[font color="darkpink"]12...Rd8 13.Qf3 h5 14.h3 Bd6 15.Rfd1 Qe7 16.Bg5[/font] gives White the advantage in space (Goh Wieming-A. Kim, Asian Ch, Cebu, 2007).

[font color="hotpink"]10.a4 Bb7 11.f4 b4 12.Nb1 c5 13.Nd2[/font] gives White a small advantage in space (Homa-Sharevich, Op, Philadelphia, 2011).

If [font color="darkorange"]b12) 8...Nxd4 9.Bxd4 Bc5[/font] then:

If [font color="darkorange"]10.Bxc5 Qxc5[/font] then:

If [font color="darkorange"]11.Kh1[/font] then:

If [font color="darkorange"]11...d6[/font] then:

If [font color="darkorange"]12.f4 e5 13.Qe1[/font] then:

If [font color="darkorange"]13...Be6[/font] then:

[font color="darkorange"]14.Rd1 exf4 15.Rxf4 Qe5 16.Qf2 Ng4 17.Qg3 h5[/font] gives Black an advantage on the kingside (Gullaksen-Trygstad, Norwegian ChT, Langesund, 2001).
[font color="darkpink"]14.Nd5 Nxd5 15.exd5 Bxd5 16.f5[/font] draw (E. Andreev-C. Balogh, Op, Baku, 2007).

If [font color="purple"]13...0-0[/font] then:

If [font color="purple"]14.Qh4 exf4 15.Nd5 Nxd5 16.exd5[/font] then:

[font color="purple"]16...h6 17.Rad1 Bd7 18.Rxf4 Rae8 19.Rdf1 f5[/font] is equal (Efimenko-Kritz, YM, Hengelo, 2001).
If [font color="hotpink"]16...g6 17.Rxf4[/font] then:

[font color="hotpink"]17...Qxd5?! 18.Bc4 Qa5 19.b4 Qe5 20.Bxf7+ Kh8 21.Re1[/font] gives White a promising kingside attack (Balashov-Tregubov, Russian Ch, St. Petersburg, 1998).
If [font color="burgundy"]17...b5 18.Bxg6 hxg6 19.Qf6 Bh3![/font] (the only move) [font color="burgundy"]20.Rh4[/font] then:

If [font color="burgundy"]20...Bxg2+!! 21.Kxg2 Qxd5+! 22.Kf2 Qc5+[/font] then:

[font color="burgundy"]23.Kf1 Qf5+ 24.Qxf5 gxf5[/font] is equal.
If [font color="darkpink"]20...Qxc2??[/font] then [font color="darkpink"]21.Rh8#.[/font]

If [font color="#FF8080"]23.Kf3 Qd5+ 24.Kf2 Qc5+ 25.Kf3 Qd5+ etc.[/font] draws.

[font color="#F76541"]14.a4 exf4 15.Rxf4 Qe5 16.Qd2 Be6 17.Raf1 Nd7[/font] gives Black a slight advantage in space (M. Ly-Krush, Op, Philadelphia, 2011).

If [font color="purple"]12.Qd2 e5[/font] then:

[font color="purple"]13.Rad1 Be6 14.Be2 Rd8 15.Bf3 0-0 16.Rfe1 b5[/font] is equal (Griffiths-Trygstad, Euro Club Cup, Antalya, 2007).
[font color="hotpink"]13.f3 0-0 14.Na4 Qc6 15.Qa5 Be6 16.Nb6 Rad8[/font] is equal (I. Smirin-Svetushkin, Euro Ch, Istanbul, 2003).

If [font color="purple"]11...b5 12.a3 Bb7 13.f4 d6[/font] then:

If [font color="purple"]14.Qe1 0-0[/font] then:

[font color="purple"]15.Qg3 e5 16.fxe5 Qxe5 17.Qh4 Bc8 18.a4 bxa4 19.Rxa4[/font] is equal (Casalla-Sheppard, Op, Philadelphia, 1995).
[font color="darkpink"]15.Qh4 Qh5 16.Qxh5 Nxh5 17.e5 dxe5 18.fxe5 Rad8 19.Rad1 f5 20.exf6 Nxf6[/font] draw (Baklan-Istratescu, Roamnian ChT, Tusnad, 2005).

14.Qe2 e5 15.fxe5 dxe5 16.Nd5 Nxd5 17.exd5 0-0

(Oral-Simic, Op, Graz, 1994).

If [font color="purple"]11.Na4 Qc7 12.c4[/font] then:

If [font color="purple"]12...d6 13.Rc1 0-0[/font] then:

If [font color="purple"]14.c5 Bd7 15.cxd6 Qxd6[/font] then:

If [font color="purple"]16.Nc5 Bc6 17.Qe2[/font] then:

[font color="purple"]17...Rac8 18.Rc3 Rfd8 19.Rfc1 Nd7 20.Nxd7 Bxd7 21.e5[/font] is equal and shortly agreed drawn (Gormally-Grant Kerr, Op, Hastings, 2009).
[font color="#CAADCD"]17...Nd7 18.Nxd7[/font] draw (Baklan-Savchenko, Euro Ch, Euro Ch, Ohrid, 2001).

[font color="darkpink"]16.Nc3 Bc6 17.Qe2 e5 18.Rfd1 Qe7 19.Bc4 Rfd8[/font] is equal (De la Paz-Almagro Mazariegos, IT, Mancha Real, Spain, 2001).

[font color="burgundy"]14.Qd2 Bd7 15.Nc3 Rac8 16.Rfd1 Rfd8 17.Be2[/font] is equal (Berndt-Giri, Bundesliga 0809, Bremen, 2009).

[font color="hotpink"]12...b6 13.Qe2 Bb7 14.Rac1 d6 15.Qe3 Nd7[/font] gives White a small advantage in space (Anand-Ljubojevic, IT, Linares, 1991).

If [font color="purple"]10.Bxf6 gxf6 11.Qg4[/font] then:

If [font color="purple"]11...Kf8 12.Kh1 h5[/font] then:

If [font color="purple"]13.Qh4 Be7 14.f4[/font] then:

[font color="purple"]14...b5 15.f5 Qe5 16.Rae1 Bb7 17.Nd1 Kg7[/font] is equal (Fedorov-Miezis, Ol, Istanbul, 2000).
If [font color="hotpink"]14...f5 15.Qh3 fxe4[/font] then:

If [font color="hotpink"]16.Nxe4 d5 17.Ng5 e5 18.Qe3 d4 19.Qf2[/font] gives White golden opportunities for attack (Tolush-Matulovic, TM, Soviet Union, 1965).
If [font color="burgundy"]16.Bxe4 d5[/font] then:

If [font color="burgundy"]17.Bf3?! d4! 18.Ne4 Qxc2 19.Rac1 Qxb2 20.Rc7 Qa3[/font] gives Black a small advantage in space (Rodriguez Vila-Panno, IT, Santiago, 2004).
[font color="darkpink"]17.Bd3! f5 18.Ne2 Qb6 19.Rab1[/font] remains equal.

[font color="#87095D"]13.Qh3 Qf4 14.Be2 b5 15.Rad1 Ke7 16.Rd5 Bb4[/font] is equal (Balashov-Tregubov, Op, Katowice, 1992).

If [font color="hotpink"]11...Qe5 12.Qg7 Rf8[/font] then:

[font color="hotpink"]13.Kh1 Qg5 14.Qxh7 Rg8 15.Qh3[/font] gives White a slight advantage in space (Sherzer-Szieberth, 1st Saturday February, Budapest, 2001).
[font color="burgundy"]13.Rae1 Qg5 14.Qxh7 b5 15.Kh1 Bb7 16.f4 Qg4[/font] gives White a better center (Bryn-Akesson, Rilton Cup 0506, Stockholm, 2005).

If [font color="magenta"]b2) 7...d6 8.f4 Be7[/font] then:

If [font color="magenta"]9.Kh1 Nbd7 10.Qe2[/font] then:

If [font color="magenta"]10...b5 11.Bd2 Bb7[/font] then:

If [font color="magenta"]12.a3[/font] then:

If [font color="magenta"]12...0-0 13.Rae1[/font] then:

If [font color="magenta"]13...Nc5 14.b4 Nxd3 15.cxd3 Rfe8[/font] then:

[font color="magenta"]16.g4 g6 17.f5 exf5 18.gxf5 Rac8 19.Rc1 Qd7[/font] is equal (Gufeld-Chiburdanidze, IT, Delhi, 1984).
[font color="burgundy"]16.Qf2 Qb6 17.Rc1 Rac8 18.Nf5 Qxf2 19.Nxe7+ Rxe7 20.Rxf2 Rec7[/font] gives Black an extra pawn, but no way to move forward (Kristjansson-E. Arancibia, Ol, Torino, 2006).

If [font color="darkorange"]13...Rad8 14.Nb3 Nc5 15.e5 Nxd3[/font] then:

[font color="darkorange"]16.exf6?! Nxe1 17.fxe7 Bxg2+ 18.Kg1 Qxe7 19.Rxe1 Ba8[/font] gives Black two extra pawns and a Rook against two minor pieces and stronger pawns (Gross-Votava, Czech ChT, 2001).
[font color="purple"]16.cxd3 dxe5 17.Rc1 e4 18.Nxe4 Qb8 19.Nxf6+ Bxf6[/font] remains equal.

If [font color="darkorange"]12...h5 13.Rae1 h4[/font] then:

[font color="darkorange"]14.Rf3 h3 15.g3 g6 16.Rf2 Nc5 17.Kg1 Rd8[/font] gives White a small advantage in space, but no way to expoit it (Karpov-Shkurikhin, Russian Ch ½-final, Novosibirsk, 2001).
[font color="purple"]14.Nd1 h3 15.g3 g6 16.Nf2 Nc5 17.b4 Na4[/font] gives Black more space, but neither side can make much use of its space (Rahal-Bologan, French ChT, Cannes, 2005).

If [font color="darkorange"]12.Rae1 Nc5 13.b4 Nxd3 14.cxd3[/font] then:

[font color="darkorange"]14...0-0 15.Rc1 Qd7 16.Rc2 Rac8 17.Rfc1 Rc7 18.a3[/font] remains equal (Makropoulou-Kabanova, OlW, Khanty-Mansiysk, 2010).
[font color="purple"]14...Rc8 15.Nd1 0-0 16.Ne3 Nd7 17.f5 e5[/font] remains equal (Wang Yu-Kabanova, OlW, Khanty-Mansiysk, 2010).

If [font color="darkorange"]10...0-0 11.Bd2[/font] then:

If [font color="darkorange"]11...Nc5[/font] then:

If [font color="darkorange"]12.Rae1 Nxd3[/font] then:

[font color="darkorange"]13.Qxd3 b5 14.a3 Bb7 15.Qh3 Qc4 16.Nb3 a5[/font] gives Black a fair advantage in space (Zawadzka-Caruana, Euro Ch, Aix-les-Bains, 2011).
[font color="burgundy"]13.cxd3 Qb6 14.Nb3 Qd8 15.d4 d5 16.e5[/font] gives White a small advantage in space (Parma-Gligoric, IT, Belgrade, 1964).

[font color="darkpink"]12.Rac1 b5 13.b4 Nxd3 14.cxd3 Qd7 15.g4[/font] gives White a slight advantage due to the possibilityy of 16.g5 (And. Volokitin-Drabke, Euro Club Cup, Rogaska Slatina, Slovakia, 2011).

If [font color="purple"]11...b5 12.Rae1 Nc5 13.e5 Nfd7[/font] then:

[font color="purple"]14.Bxh7+ Kxh7 15.Qh5+ Kg8 16.Rf3 dxe5 17.Rh3 f5[/font] is flashy, but equal (Bergsson-Meier, Op, Reykjavik, 2008).
[font color="hotpink"]14.Rf3 Nxd3 15.cxd3 Bb7 16.Rh3 g6 17.Nf3 Rfd8[/font] is equal (Nadig-Zhang Jilin, World Jr Ch Girls, Istanbul, 2005).

If [font color="darkorange"]9.Be3 Nc6 10.Qf3 0-0[/font] then:

If [font color="darkorange"]11.Nb3 b5 12.Rae1[/font] then:

If [font color="darkorange"]12...Bb7 13.Qh3[/font] then:

If [font color="darkorange"]13...Nb4[/font] then:

If [font color="darkorange"]14.a3 Nxd3 15.cxd3[/font] then:

[font color="darkorange"]15...Rfe8 16.Nd4 Bf8 17.Kh1 Qe7 18.f5 e5 19.Nf3[/font] is equal (Areshchenko-Smirin, Eueo Ch, Istanbul, 2003).
[font color="purple"]15...Rac8 16.Rc1 Qd7 17.Na5 Ba8 18.Bd4 Rfe8 19.b4[/font] is equal (Espig-Hort, Rubinstein Mem, Polonica Zdroj, 1977).

If [font color="hotpink"]14.Nd4 Rae8[/font] then:

[font color="hotpink"]15.g4!? Nd7 16.g5 Nxd3 17.cxd3 Nc5 18.Rd1 b4[/font] gives Black a comfortable advantage with freedom and the initiative(Malakhov-Svidler, Russian Ch, Elista, 1997).
[font color="darkpink"]15.Rc1 h5 16.a3 Nc6 17.Nce2[/font] remains equal.

If [font color="#CAACDC"]13...g6 14.a3 Rfe8 15.Kh1 Nd7 16.f5! Bf6 17.Rf2[/font] gives White a small advantage with more space, but Black's compact defense makes it difficult to exploit (So. Polgar-Damljanovic, IT B, Wijk aan Zee, 1990).

If [font color="purple"]12...Rb8[/font] then:

[font color="purple"]13.Qg3 b4 14.Nd1 e5 15.f5 Kh8 16.Nf2 a5[/font] is equal (Dr. Nunn-Bellin, Op, London, 1973).
[font color="hotpink"]13.g4 Nb4 14.g5 Nd7 15.Qh5 Re8 16.Rf3[/font] is equal (Nicevski-Matulovic, IT, Skopje, 1969).

[font color="darkpink"]12...Nh5 13.Qf2 Nf6 14.Nxc6 bxc6 15.Qg3 Rab8 16.e5[/font] reamins equal.

If [font color="purple"]11.Kh1 Bd7[/font] then:

If [font color="purple"]12.Rae1 b5 13.a3 Rac8[/font] then:

[font color="purple"]14.Nxc6 Bxc6 15.Qh3 e5 16.fxe5 dxe5 17.Bg5 Qd6[/font] is equal (Rasulov-Pratil, World Jr Ch, Chennai, 2011).
[font color="darkpink"]14.g4 Nxd4 15.Bxd4 Bc6 16.g5 Nd7 17.Nd5[/font] is equal (Pimenidis-Moutousis, Op, Nikea, Greece, 2001).

If [font color="hotpink"]12.Qg3[/font] then:

[font color="hotpink"]12...Nb4!? 13.Be2 Rac8?! 14.a3 Nc6 15.Rad1 Kh8 16.Kg1[/font] gives White a small advantage in space (Golubev-A. Alexeev, IT, Alushta, 2005).
[font color="burgundy"]12...Nh5 13.Qf2 Nf6 14.Nxc6 bxc6 15.Qg3 Rab8 16.e5[/font] reamins equal.

7.Bg5

If [font color="red"]7.Nf3[/font] then:

If [font color="red"]7...d6 8.Nc3 Be7 9.a4[/font] then:

If [font color="red"]9...Nc6 10.Bg5 Be6 11.Bxf6 Bxf6 12.Nd2 0-0 13.Nc4[/font] then:

[font color="red"]13...Rc8 14.Ne3 Bg5 15.Ned5 Ne7 16.Nxe7+ Qxe7[/font] gives Black a small advantage in space (I. Vasilevich-Igla, Euro Youth, Halkidiki, 2001).
[font color="burgundy"]13...Bg5 14.Re1 g6 15.Bf1 Nd4 16.a5 Bxc4 17.Bxc4[/font] gives White a slight advantage ibn space (Novikova-Igla, World Youth Girls, Oropesa del Mar, Spain, 2001).

[font color="darkpink"]9...b6 10.Nd2 0-0 11.Nc4 Bg4 12.Qe1 Be6 13.Bg5[/font] gives White a fair advantage in space (Fedorowicz-Dorfman, Op, New York, 1989).

If [font color="darkred"]7...Nc6[/font] then:

If [font color="darkred"]8.Bg5 h6 9.Bxf6 Qxf6 10.Nc3 Bc5 11.Nd5 Qd8 12.c3 d6[/font] then:

[font color="darkred"]13.b4 Ba7 14.Bc4 0-0 15.Qd3 Be6 16.Bb3[/font]gives White a small advantage in space (Motylev-Pantsulaia, Euro Ch, Aix-les-Bains, 2011).
[font color="darkorange"]13.Qe2 0-0 14.Rad1 Bg4 15.Bc2 Ne7 16.b4[/font] gives White a small advantage in space (N. Guiliev-Jobava, World Cup, Khanty-Mansiysk, 2011).

[font color="magenta"]8.Bc4 Be7 9.Nc3 0-0 10.Bg5 d6 11.Bxf6 Bxf6 12.h3[/font] gives White a small advantage in space (L. Lenderman-Mishuchkov, World Sr Ch, Rijeka, 2011).

7...h6

[font color="red"]7...d6 8.Nf5 Bxf5 9.Bxf6 gxf6 10.exf5 d5 11.c4[/font] gives White better pawns.(Nuri-De Jong, Op, Groningen, 2011).

8.Bxf6 Qxf6 9.Nf5 g6

If [font color="red"]9...d5 10.Nc3 d4 11.Nd5 Qd8[/font] then:

[font color="red"]12.Bc4 Nc6 13.f4 Na5 14.Qd3 Bxf5 15.exf5[/font] gives White a fair advantage in space (T. Kosintseva-Hou Yifan, ITW, Hangzhou, 2011).
[font color="darkred"]12.Ng3 g6 13.f4 exf4 14.Nxf4 Nc6 15.Bc4 Ne5[/font] is equal (Vallejo-Kunte, Op, Pittaya, Thailand, 2011).

10.Ne3 Bc5 11.Nc3

[font color="red"]11.Nd5 Qd8 12.b4 Ba7 13.a4 d6 14.a5?! Be6[/font] gives White a small advantage in space (Caruana-Nakamura, IT 1112, Reggio Emilia, 2012).

11...d6 12.Ncd5 Qd8 13.Kh1 (N)

White signals that he intends to play f3f4.
If [font color="red"]13.c3!? Be6![/font] then:

[font color="red"]14.Bc2!? 0-0 15.Ng4 Nd7 16.Nxh6+ Kg7 17.Nf5+ gxf5 18.exf5 Bxd5[/font] is equal (Karjakin-Svidler, Yal Mem, Moscow, 2010).
[font color="darkred"]14.Bc4! 0-0 15.a4 Nd7 16.b4 Bxe3 17.Nxe3[/font] gives White a small advantage in space.

[font color="blue"]13.Qf3 Be6 14.Rad1 Nd7 15.c3 Bxe3 16.Nxe3[/font] gives White a small advantage in space.

13...Nc6

Black tightens the game.
[font color="red"]13...Be6! 14.f4 Bxe3 15.Nxe3 exf4 16.Rxf4 Qg5 17.g3[/font] gives White only a slim advantage in space.

14.Ng4

White still has a small advantage in space; Black's game is somewhat cramped.

14...0-0 15.Ngf6+ Kg7 16.c3!?

This is apparently played with the idea of developing the Queen on either a4 or b3.
More flexible is [font color="red"]16.Qd2! Be6 17.f4 Bxd5 18.Nxd5 Ne7 19.Nxe7 Qxe7 20.f5[/font] giving White a fair advantage.

16...Be6?!

Black misses a chance to exchange out of a cramped position.
If [font color="red"]16...Ne7! 17.Bc2 Nxd5 18.Nxd5 a5 19.f4 exf4 20.Rxf4[/font] is equal.

[center]BLACK: Fabiano Caruana[/center]

[center][/center]

[center]WHITE: Veselin Topolov[/center][center]Position after 16...Bc8e6[/center]

17.f4!

White has a small advantage in space.

17...Bxd5 18.Nxd5 exf4 19.Rxf4 Qg5

If [font color="red"]19...Rc8?! 20.Qd2![/font] then:

[font color="red"]20...a5 21.Raf1 Ne5 22.g3 Rb8 23.Be2 b5 24.b4[/font] gives White a strong initiative.
[font color="darkred"]20...Qg5 21.b4 Ba7 22.Raf1 Ne5 23.Be2 Rc6 24.a4[/font] gives White more freedom.

20.Qf1

White has command of the semi-open f-file.

20...Ne5 21.Rd1!?

White overprotects the Bishop, but it might be easier to just move it.
If [font color="red"]21.Be2! a5 22.Qe1[/font] then:

[font color="red"]22...Nd7 23.h4 Qe5 24.Qg3 Nb6 25.Rd1 Nxd5 26.Rxd5[/font] continues to give White a fair advantage in space and the initiative.
[font color="darkred"]22...h5?! 23.Qd2! Rac8 24.g3 Kg8 25.a3 Ba7 26.b4[/font] gives White a substantial advantage owing to his control of f6 and f7.

21...Rae8!?

White overprotects the Bishop, but it might be easier to just move it.
If [font color="red"]21...h5! 22.g3[/font] then:

[font color="red"]22...Rh8 23.b4 Ba7 24.Qg2 a5 25.Bb5[/font] gives White a small advantage in space.

[font color="darkred"]22...a5 23.a4 Rh8 24.Qh3 Rac8 25.Be2 Rhf8 26.Rdf1[/font] leaves White with more activity, command of the f-file and a comfortable advantage in space.

22.Bc2!?

White's strength is clearly on the kingside, so the Bishop should be go to e2.
If [font color="red"]22.b4! Ba7 23.Be2 h5[/font] then:

[font color="red"]24.g3! Rc8 25.a4 Rfd8 26.Qg2 Re8 27.Rdf1[/font] gives White more freedom.
If [font color="darkred"]24.h4?! Qg3! 25.Qe1 Qxe1+ 26.Rxe1[/font] then:

[font color="darkred"]26...Nd7 27.Bc4 Rc8 28.Bb3 Ne5 29.Ref1 a5 30.bxa5 Rc5[/font] is equal.
[font color="magenta"]26...f5 27.Nc7 Re7 28.Nd5 Ree8 29.Nc7 Re7 etc.[/font] draws.

22...h5

White has a small advantage in space. Things could have been much worse for Black.

23.Bb3?!

White overprotects the Knight. removing soem protection from the e-pawn to do so.
If [font color="red"]23.g3! Ng4 24.h3 Ne5 25.Qg2[/font] then:

[font color="red"]25...a5 26.b4 axb4 27.cxb4 Ba7 28.h4 Qd8 29.Ba4[/font] gives White the initiative and a comfortable advantage in space.
[font color="darkred"]25...Rc8 26.a4 a5 27.Bd3 Rg8 28.h4 Qd8 29.Bb5[/font] gives White a comfortable advantage.

23...Ng4!

Black turns the game around and assumes a fair advantage in space.

24.g3

If [font color="red"]24.Rd2?![/font] then:

[font color="red"]24...f5! 25.Re2 fxe4 26.g3 Qd8 27.Rxf8 Rxf8[/font] leaves Black with an extra pawn, command of attacking lanes and the initiative.
[font color="darkred"]24...Rxe4 25.Rxe4 Qxd2 26.Re2 Qg5 27.h3 Ne5[/font] leave Black with an extra pawn.

[center]BLACK: Fabiano Caruana[/center]

[center][/center]

[center]WHITE: Veselin Topolov[/center][center]Position after 24.g2g3[/center]

24...Rxe4!!

The sham sacrifice diverts the Rook from the f-file, allowing Black to regain material immediately.

25.Rxe4

If [font color="red"]25.Re1 Rxe1 26.Qxe1 Qe5[/font] then:

[font color="red"]27.Rf1 f5 28.Qxe5+ dxe5 29.h3 Nf2+ 30.Kg2 Nd3[/font] wins a pawn, leaving Black up by two pawns.
If [font color="darkred"]27.Qxe5+ dxe5 28.Rf1 e4 29.Kg2 Rd8 30.Re1 f5[/font] leaves Black up by two pawns.

25...Nf2+

This is according to plan.

26.Qxf2?

White gives up more material than necessary and loses.
Correct is [font color="red"]26.Kg2! Nxe4 27.Qf4 Qxf4 28.Nxf4 Nf6 29.Re1 Re8[/font] leaving Black with an extra pawn, but White has drawing chances in a minor piece ending.

26...Bxf2!

Of course, Black takes it.

27.Kg2 Bc5 28.h4 Qf5 29.Re2

If [font color="red"]29.Rf4 Qe5 30.Rdf1 Qe2+ 31.Kh3 f5[/font] then:

[font color="red"]32.Nc7 Kh6 33.Ne6 Re8 34.Nxc5 dxc5 35.R1f2 Qd3[/font] leaves Black winning with an extra pawn and more freedom.
If [font color="darkred"]32.Bd1[/font] then Black wins after [font color="darkred"]32...Qxb2 33.a4 Qa2 34.Bf3 Re8 35.Rd1 b6.[/font]

29...Qg4?

This should have cost Black the victory.
If [font color="red"]29...Kh6! 30.Rde1 a5 31.Rd1 b5 32.Rf1 Qc8[/font] gives Black a tactical edge; for example, he can pin the Knight at d5 and then advace his a-pawn, driving the Bishop from its post protecting the Knight.
If [font color="blue"]29...g5![/font] then:

If [font color="blue"]30.Bc2 Qd7 31.Re7 Qb5[/font] then:

[font color="blue"]32.Bb3 gxh4 33.gxh4 Bb6 34.Nxb6 Qxb6 35.Rf1 Qd8[/font] gives Black in spite of a temporary material deficit; Black will eith take a Rook, giving him an overwhelming material advantage, or if White plays 36.Rxb7, replies 36...Qxa4 and commences an attack on White's exposed King.
If [font color="dodgerblue"]32.b4[/font] then Black wins after [font color="dodgerblue"]32...Bb6 33.Re4 Bd8 34.hxg5 Bxg5 35.a4 Qc6.[/font]

[font color="darkblue"]30.hxg5 Qxg5 31.Nf4 h4 32.Rd3 b5 33.Re4 Qf5[/font] gives Black a strong initiative.

30.Rde1?

White fails to capitialize on Black's weak play and loses after all.
If [font color="red"]30.Re7! g5 31.Rf1[/font] then:

[font color="red"]31...gxh4 32.Rfxf7+ Rxf7 33.Rxf7+ Kxf7 34.Ne3+[/font] continues to give Black the advantage, but with the Bishops of opposite colors making a draw the likely outcome.
[font color="darkred"]31...Qc8?! 32.hxg5 Qg4 33.Rfxf7+ Rxf7 34.Rxf7+ Kxf7 35.Nf6+[/font] gives White the upper hand, but with the only pieces remaining Bishops of opposite colors the game will likely end in a draw.

[center]BLACK: Fabiano Caruana[/center]

[center][/center]

[center]WHITE: Veselin Topolov[/center][center]Position after 30.Rd1e1[/center]

30...g5!

Black shuts down White's kingside.

31.Re4

If [font color="red"]31.Ne3[/font] loses quickly after [font color="red"]31...Qe4+ 32.Kh3 f5 33.Bd5 Qe5[/font] when:

If [font color="red"]34.c4[/font] then Black wins after [font color="red"]34...f4 35.gxf4 Qxf4 36.Kg2 Bxe3 37.Rxe3 Qf2+.[/font]
[font color="darkred"]34.Bf3 f4 35.Ng4 Qf5 36.Re7+ Rf7 37.Rxf7+ Kxf7[/font] wins the Knight; White has no good moves at all.

31...Qf5 32.R1e2 gxh4 33.Nf4

[font color="red"]33.gxh4 Qg6+ 34.Kf3 Re8 35.Rg2 Qxg2+ 36.Kxg2 Rxe4[/font] still leaves Black an exchange and a pawn to the good.

33...Qg5 34.Kh1 d5 35.Bxd5

If [font color="red"]35.Re5[/font] then after [font color="red"]35...Qg4 36.Bxd5 Rd8 37.Rg2 Kf8 38.Rxh5 hxg3[/font] White is toast.

35...hxg3 36.c4

[font color="red"]36.Bc4 Qh4+ 37.Kg2 Qh2+ 38.Kf3 Qh1+ 39.Rg2 h4[/font] squeezes White in a vise.

36...Qh4+ 37.Kg2 Qh2+ 38.Kf3 Qh1+ 39.Kxg3 h4+ 0-1

[font color="red"]40.Kg4 f5+[/font] wins a Rook.
G-n Topalov resigns.

Jack Rabbit

(45,984 posts)

9. Gashimov - Radjabov, Group A, Round 11

Reply to Jack Rabbit (Reply #2)

Fri Feb 24, 2012, 05:35 AM

Feb 2012

[center][/center]

[center]Teimour Radjabov[/center]
[font size="1"]Photo by Frank Hoppe in http://commons.wikimedia.org/wiki/Category:Teimour_Radjabov Wikimedia Commons (Public Doamin)
[/font]

Vugar Gashimov - Teimour Radjabov
http://www.chessgames.com/perl/chessgame?gid=1654851
Tata Steel Chess Tounament (Group A), Round 11
Wijk aan Zee, 27 January 2012

Open Norman Sicilian Game: Taimanov Defense (Four Knights' Variation)

1.e4 c5 2.Nc3 e6

We dub this the Norman Sicilian, which was a nineteenth century idea of German/American master, Louis Paulsen. The Normans were French invaders best known for conquering England in 1066 (the British monarch has ever since been a descendant of William, Duke of Normandy), and also overran Sicily in 1068. Thus, since 1.e4 e6 is the French Game, 1.e4 c5 2.Nf3 e6 is the Norman Sicilian Game.

3.Nf3 Nc6 4.d4 cxd4 5.Nxd4

5...Nf6

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center]
[center]Open Norman Sicilian Game: Taimanov Defense (Four Knights' Variation)[/center]
[center]Position after 5...Nf6[/center]

The text is the Four Knights' Variation. The Bastrikov Variation is closer to Paulsen's idea, although Paulsen used what is more recognizable nowadays as a Kan Defense (1.e4 c5 2.Nf3 e6 3.Nc3 a6 4.d4 cxd4 5.Nxd4 Qc7, Winawer-L. Paulsen, German Chess Congress, Berlin, 1881). The Queen at c7 cover e5; Taimanov's idea is to play an early ...Nc6, thus overprotecting the e5 square.
[font color="red"](Bastrikov Variation)[/font] If [font color="red"]5...Qc7[/font]then:

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center]
[center]Open Norman Sicilian Game: Taimanov Defense (Bastrikov Variation)[/center]
[center]Position after 5...Qc7[/center]

If [font color="red"]6.Be3 a6[/font] then:

If [font color="red"]7.Qd2 Nf6 8.0-0-0[/font] then:

If [font color="red"]8...Be7 9.f3[/font] then:

If [font color="red"]9...h5[/font] then:

If [font color="red"]10.Nb3[/font] then:

If [font color="red"]10...d6[/font] then:

[font color="red"]11.Kb1 b5 12.Bxb5 axb5 13.Nxb5 Qb8 14.Nxd6+ Kf8 15.Qc3[/font] gives White a slight advantage in space (Yu Yangyi-Xu Jun, Chinese ChT, Chengdu, 2011).
[font color="burgundy"]11.Bg5 Rb8 12.f4 b5 13.Bxf6 gxf6 14.Bd3 b4 15.Ne2 a5 16.Kb1 a4[/font] is equal (Abergel-Negi, Chigorin Mem Op, St. Ptersburg, 2009).

[font color="darkpink"]10...b5 11.Bd3 Ne5 12.Qf2 Rb8 13.Qg3 Nxd3+ 14.Rxd3 Qxg3 15.hxg3 d6[/font] is equal (Schut-Maladinovic, EU ChU16 (Girls), Herceg Novi, 2008).

If [font color="darkred"]10.Qf2 d6 11.h3 b5 12.Nxc6 Qxc6 13.Bd3[/font] then:

If [font color="darkred"]13...h4 14.Kb1 b4 15.Ne2 e5[/font] then:

If [font color="darkred"]16.Bg5 Nd7 17.Bxe7 Kxe7[/font] then:

[font color="darkred"]18.Nc1 a5 19.Qe2 Nf6 20.Bb5 Qc7 21.Ba4 Be6[/font] is equal (N. Kosintseva-Javakishvilli, Euro Club Cup W, Ohrid, 2009).
[font color="burgundy"]18.Qe3 Qc5 19.Qd2 Nf6 20.Rhf1 Be6 21.f4 a5[/font] is equal (Nijboer-Giri, Dutch Op, Dieren, 2009).

[font color="darkpink"]16.c4 bxc3 17.Nxc3 Be6 18.Rc1 Qb7 19.f4 exf4 20.Bxf4 0-0[/font] is equal (Pérez Ponsa-Cramling, Masters, Gibraltar, 2009).

If [font color="magenta"]13...b4 14.Ne2 e5 15.g4 Be6 16.Kb1[/font] then:

[font color="magenta"]16...hxg4 17.hxg4 Rxh1 18.Rxh1[/font] gives White a small advantage in space; Black has then White Knight hemmed in at e2 (Vachier Lagrave-Maceija, Bundesliga 0809, Germany, 2008).
[font color="darkorange"]16...g6 17.g5 Nd7 18.f4 Nc5 19.f5 gxf5 20.exf5 Nxd3 21.cxd3 Bd5[/font] is equal (Rosen-Hughes, US Jr Ch, St. Louis, 2010).

If [font color="darkred"]9...0-0 10.g4 b5 11.g5[/font] then:

If [font color="darkred"]11...Ne8 12.h4 Bb7[/font] then:

If [font color="darkred"]13.Nxc6 Bxc6 14.Ne2[/font] then:

If [font color="darkred"]14...Rc8 15.Nd4 Bb7 16.Kb1 Nd6 17.Bf4 Qb6[/font] then:

[font color="darkred"]18.Be3?! Qc7 19.Bf4 Qb6 20.Be3 Qc7[/font] draw (Nadev-A. Sokolov, Euro Ch, Plovdiv, 2008).
[font color="darkpink"]18.h5! Nc4 19.Bxc4 bxc4 20.c3 Rc5 21.Be3[/font] continues to give White a comfortable advantage.

[font color="purple"]14...d5 15.e5 a5 16.Nd4 b4 17.h5 Bd7 18.f4[/font] gives White a comfortable advantage in space concentrated on the kingside (Grandelius-Gretarsson, Euro ChU16, Herceg Novi, 2008).

[font color="darkorange"]13.Kb1 Ne5 14.h5 Rc8 15.Qg2 b4 16.Na4 f5 17.gxf6[/font] gives White a comfortable advantage in space (Karjakin-Morozevich, IT A, Wijk aan Zee, 2009).

[font color="magenta"]11...Nh5 12.Nce2 Rd8 13.Ng3 Nxd4 14.Qxd4 Nf4 15.h4 Bb7 16.Qb6 Qb8 17.Kb1 d5 18.Bxf4 Qxf4 19.Qxb7 Bc5 20.exd5 Qxg3 21.Bd3[/font] draw (Salgado López-Movsesian, Aeroflot Op, Moscow, 2011).

If [font color="darkred"]8...Bb4 9.f3[/font] then:

If [font color="darkred"]9...Ne5 10.Nb3 b5[/font] then:

If [font color="darkred"]11.Qe1 Be7 12.f4 Ng6 13.e5 Ng4[/font] then:

If [font color="darkred"]14.Ne4 14...0-0 15.Bc5 Bb7[/font] then:

[font color="darkred"]16.Nd6 Bd5 17.Rxd5 exd5 18.Qd1 Nf6 19.g3 Ne4 20.Qxd5 Nxc5 21.Nxc5[/font] gives White a fair advantage in space (Mamedov-Zakhartsov, Op, Cappelle-la-Grande, 2010).
[font color="burgundy"]16.Bxe7 Nxe7 17.Nd6 Bd5 18.Bd3 f6 19.Qh4 Nh6[/font] gives White a small advantage in space (K. Szabo-Horvath, Hungarian Ch, Szekesfehervar, 2006).

If [font color="magenta"]14.Bd2 Bb7 15.Bd3 Rc8 16.Qe2[/font] then:

If [font color="magenta"]16...f5 17.exf6 Nxf6 18.Rhf1 0-0[/font] then:

[font color="magenta"]19.g3 b4 20.Ne4 Nxe4 21.Bxe4 a5 22.Nd4[/font] gives White the advantage in space (Svidler-N. Vitiugov, Russian Ch, Moscow, 2006).
[font color="purple"]19.Kb1 b4 20.Ne4 Nxe4 21.Bxe4 Bxe4 22.Qxe4[/font] is equal (Pérez Candelario-Logothetis, Euro Ch, Kusadasi, 3008).

[font color="darkorange"]16...Nh6 17.Ne4 0-0 18.Rhf1 f5 19.exf6 Bxf6 20.Nxf6+ Rxf6 21.g3[/font] gives White a small advantage in space; Black has command of the c-file, restricting White's freedom (Aginian-Velcheva, Euro ChTW, Crete, 2007).

If [font color="magenta"]11.Kb1[/font] then:

If [font color="magenta"]11...Be7 12.Qf2 d6[/font] then:

If [font color="magenta"]13.Bb6 Qb8 14.Bd4 0-0 15.g4[/font] then:

If [font color="magenta"]15...Bb7 16.g5 Nfd7[/font] then:

[font color="magenta"]17.Rg1 b4 18.Ne2 Rc8 19.Ng3 a5 20.f4 a4[/font] gives Black more freedom (Sebag-Sulypa, Masters, Bois Colombes, 2004).
[font color="burgundy"]17.f4 b4 18.fxe5 bxc3 19.exd6 Qxd6 20.Be2[/font] gives White the advantage in space an in the center (T. Kosintseva-Javakhishvilli, Euro Club Cup W, Fügen, 2006).

[font color="darkpink"]15...Nfd7 16.g5 Nc4 17.h4 a5 18.f4 a4 19.Nc1[/font] gives White the advantage in space (Inarkiev-Gershon, Op, Athens, 2005).

If [font color="darkorange"]13.g4 Nfd7 14.Rg1 Bb7 15.g5 Rc8[/font] then:

[font color="darkorange"]16.f4 b4 17.Nd5 exd5 18.fxe5 Nxe5 19.exd5 0-0 20.Bh3 Rce8 21.Bf5 Bd8[/font] is equal (N. Kosintseva-Javakhishvilli, World ChTW, Ekaterinburg, 2007).
[font color="purple"]16.a3 Nc4 17.Bxc4 bxc4 18.Nd4 Rb8 19.h4 d5[/font] is equal (S. Salov-Gutsche, Corres, 2003).

If [font color="darkorange"]11...Nc4 12.Bxc4 bxc4[/font] then:

If [font color="darkorange"]13.Nc1 Rb8[/font] then:

[font color="darkorange"]14.N1e2 0-0 15.Bf4 e5 16.Bg5 Ne8 17.Ka1 d6 18.a3 a5 19.Qc1 Be6 20.Na2 f5[/font] gives Black a strong advantage in space, a near-center pawn duo and the Bishop pair; White is targeting a backward pawn at d6 and has command of the d-file (Morozevich-N. Vitiugov, Russian Ch, Moscow, 2007).
If [font color="purple"]14.Bf4 e5 15.Bg5 Qb6 16.N1e2 Ba3[/font] then:

If [font color="purple"]17.b3 0-0 18.Bxf6 Qxf6 19.Nd5 Qd8[/font] then:

If [font color="purple"]20.f4 exf4 21.Qxf4 Bb7[/font] then:

[font color="purple"]22.Ng3 Bxd5 23.Rxd5 Rb6 24.Rhd1 cxb3 25.axb3 Qc8 26.R1d3 Rd8 27.e5 Qc6 28.Ne4[/font] gives White the advantage with more space and a better center; Black is able to make threats on the queenside (Cheparinov-Pelletier, Euro ChT, Crete, 2007).
[font color="darkpink"]22.Rhf1 a5 23.Nec3 Bc6 24.Rd4 cxb3 25.axb3 Bb4 26.e5 Bxc3 27.Nxc3 Qe7 28.Kb2 Rbe8[/font] gives White a small advantage in space and a better center (Krush-Robson, US Ch, St. Louis, 2010).

[font color="burgundy"]20.Qc3 cxb3 21.axb3 d6 22.Qc7 Qxc7 23.Nxc7 f5[/font] is equal (Pikula-Dragomirescu, Belgrade Trophy, Obrenovac, 2010).

[font color="hotpink"]17.Na4! Qc6 18.Bxf6 gxf6 19.Nec3 Be7 20.Rhe1[/font] gives White a better center, stronger pawns and more freedom; Black has command of the b-file (Fritz 13).

[font color="purple"]13.Nd4 Rb8 14.g4 0-0 15.Ka1 d6 16.a3 Ba5[/font] draw (Sax-Goloshchapov, Euro Club Cup, Rethymnon, 2003).

If [font color="magenta"]9...Ne7 10.Nde2 b5 11.Bf4 e5 12.Bg5[/font] then:

[font color="magenta"]12...Bb7 13.Kb1 Ba5 14.Bxf6 gxf6 15.Qh6 Qb6 16.g3 Qe6 17.Bh3[/font] White has an impressive advantage in space, command of the d-file, more active pieces and stronger pawns; Black has the the Bishop pair (Anand-Polgar, World Ch Trmt, San Luís, 2005).
[font color="darkorange"]12...h5 13.Kb1 Ba5 14.Qd6 Qxd6 15.Rxd6 Bc7 16.Rd1[/font] is equal (Motylev-Maiwald, Euro Ch, Rijeka, 2010)

If [font color="darkred"]7.Bd3 Nf6 8.0-0 Ne5 9.h3 Bc5[/font] then:

If [font color="darkred"]10.Kh1 d6 11.f4[/font] then:

If [font color="darkred"]11...Ng6 12.Qe1[/font] then:

If [font color="darkred"]12...0-0 13.f5 Ne5 14.Qh4[/font] then:

If [font color="darkred"]14...Bd7 15.Rf3 Nxf3 16.gxf3 Qd8[/font] then:

[font color="darkred"]17.Rg1 Ne8 18.Rxg7+ Nxg7 19.f6 Kh8 20.Bg5 Bxd4 21.fxg7+ Bxg7 22.e5 h6 23.Qe4 f5 24.exf6[/font] Black resigns facing mate in two (Haznedaroglu-Iotov, Euro Ch, Antalya, 2004).
[font color="burgundy"]17.e5[/font] then after [font color="burgundy"]17...dxe5 18.Rg1 exf5 19.Rxg7+ Kxg7 20.Bh6+ Kh8[/font] Black wins (Harutjunyan-Aroshidze, Ebralidze Mem, Tbilisi, 2007).

[font color="darkpink"]14...b5 15.Rf3 Nxf3 16.gxf3 Ne8 17.Rg1 g6 18.Rg4 Qb7 19.Qh6 e5[/font] gives Black the exchange and White more space (García-Vescovi, PanAm Ch, Cali, 2001).

If [font color="magenta"]12...Bd7 13.f5 Ne5[/font] then:

If [font color="magenta"]14.Qh4 Qb6 15.Nce2 0-0-0[/font] then:

[font color="magenta"]16.Bg1 exf5 17.b4 Qxb4 18.Rab1 Qa4 19.exf5 Rhe8[/font] gives White more space, but Black is threatening to take a pawn (Haznedaroglu-Ribli, Euro Club Cup, Saint Vincent, 2005).
[font color="purple"]16.b4 Qxb4 17.Rab1 Qa4 18.Rb3 Nxd3 19.cxd3 e5[/font] is equal (Stoumbos-Javakhishvili, Anibal Op, Linares, 2005).

[font color="darkorange"]14.Qg3 0-0 15.Nce2 Nxd3 16.cxd3 e5 17.Bh6[/font] gives White a small advantage in space (Fedorov-A. Mastrovasilis, Euro Ch, Kusadasi, Turkey, 2006).

If [font color="magenta"]11...Ned7[/font] then:

[font color="magenta"]12.Qf3 b5 13.Nb3 Bb7 14.a4 b4 15.Ne2[/font] is equal (Tal-Najdorf, TM, Belgrade, 1970).
[font color="darkorange"]12.a3 0-0 13.Qe1 Qb6 14.Qf2 e5 15.fxe5 dxe5 16.Nf5[/font] gives White a small advantage in space (Kasparov-Ivanchuk, IT, Novgorod, 1994).

If [font color="magenta"]10.Qe2 d6 11.f4[/font] then:

If [font color="magenta"]11...Ng6 12.Nb3 Bxe3+ 13.Qxe3 0-0 14.Rae1 b5[/font] then:

If [font color="magenta"]15.e5 dxe5[/font] then:

[font color="magenta"]16.Bxg6 hxg6 17.Qxe5 Qa7+ 18.Kh2 Bb7[/font] is equal (Hennings-Hort, Capablanca Mem, Havana, 1971).
If [font color="darkorange"]16.fxe5 Nd7 17.Bxg6 hxg6 18.Nd4 Bb7[/font] then:

[font color="darkorange"]19.Nd1 20.c3 Nb6[/font] then:

If [font color="darkorange"]21.Nf2 Nc4 22.Qg5 Rd5 23.Ng4 Qd8 24.Nf6+ gxf6 25.Rxf6 Rxd4 26.Rxg6+[/font] draw (Radulov-Suetin, IT, Badapest, 1970).
[font color="burgundy"]21.a3?! Nc4! 22.Qf2 Qc5 23.b4 Qe7 24.Qf4 Nxa3[/font] gives Black an extra pawn; White has a space advantage and is able to draw (Furhoff-Divljan, IT, Belgrade, 2001).

If [font color="darkpink"]19...b4 20.Nf2 Rad8 21.Ng4 Qc5 22.Rd1 Nb6[/font] gives Black a small advantage in space with the ability to use the c4 square (Suetin-J. Horvath, Barcza Mem, Debrecen, 1987).
[font color="purple"]19.a4 b4 20.Na2 a5 21.c3 b3 22.Nc1 Nc5[/font] is equal (Radulov-Marjanovic, IT, Belgrade, 1982).

If [font color="darkorange"]15.a3 Bb7[/font] then:

[font color="darkorange"]16.Kh1 Rac8 17.Nd4 Rfe8 18.e5 Nd5 19.Nxd5 Bxd5 20.exd6 Qxd6 21.Qf2 f5[/font] is equal (Mecking-Eleodoro Juarez, IT, Mar del Plata, 1971).
[font color="purple"]16.Rf2 Rfd8 17.Rd2 Rac8 18.Be2 e5 19.f5 Ne7[/font] is equal (Denny-Illescas Córdoba, Ol, Thessaloniki, 1988).

If [font color="darkorange"]11...Ned7?![/font] then:

[font color="darkorange"]12.Kh1!? 0-0 13.Nb3 Bxe3 14.Qxe3 b5 15.a3[/font] is equal (Andersson-Hort, IT A, Wijk aan Zee, 1971).
[font color="purple"]12.g4! b5 13.g5 Qa7 14.Qf2 Nh5 15.Rae1[/font] gives White a small advantage in space.

If [font color="darkred"]a) 6.Be2 a6 7.0-0 Nf6 8.Be3 Bb4 9.Na4[/font] then:

If [font color="darkred"]9...Be7 10.Nxc6 bxc6 11.Nb6 Rb8 12.Nxc8 Qxc8 13.Bd4 c5 14.Be5 Rb6[/font] then:

If [font color="darkred"]15.Qd3 d6 16.Bc3 0-0 17.b3 d5[/font] then:

If [font color="darkred"]18.exd5 Nxd5 19.Be5[/font] then:

If [font color="darkred"]19...Rd8 20.Qg3[/font] then:

If [font color="darkred"]20...f6 21.Bb2[/font] then:

If [font color="darkred"]21...Bd6[/font] then:

[font color="darkred"]22.Qf3 22...Qc7 23.g3 Be5 24.Bxe5 Qxe5 25.Bc4 Qc7 26.Rfe1[/font] gives White more freedom (Barua-Muhren, IT, Arnhem, 2007).
[font color="burgundy"]22.Qg4 Qc7 23.g3 Be5 24.Bxe5 Qxe5 25.Bc4[/font] is equal (Atoufi-Sarkar, Foxwoods Op, Mashantucket, 2007).

[font color="purple"]21...Rbd6 22.Rad1 e5 23.Qf3 Nf4 24.Bc4+ Kh8 25.Rxd6 Rxd6 26.Bc1[/font] gives White strong pawns, the initiative and control of the light squares (Predojevic-Matsenko, Euro Ch, Budva, 2009).

If [font color="magenta"]20...Bf6[/font] then:

[font color="magenta"]21.f4 Rb4 22.Bc4 Bxe5 23.fxe5 Qc6 24.Rf3[/font] gives White threats against the Black King and a small advantage in space (Shirov-Ljubojevic, Amber Rapid, Monte Carlo, 2001).
[font color="darkorange"]21.Bxf6 Nxf6 22.Rfd1 h6 23.h3 Rd5 24.Bc4[/font] gives White a strong initiative (Efimenko-Neverov, Ukrainian Ch, Rivne, 2005).

If [font color="magenta"]19...Bf6 20.Bxf6 Nxf6 21.Rad1[/font] then:

[font color="magenta"]21...Qc7 22.a4 h6 23.Qd2 Nd5 24.a5 Rb4 25.Bxa6 Qxa5[/font] is equal (Shirov-Lutz, Bundesliga 0001, Germany, 2001).
[font color="darkorange"]21...Nd5 22.Bf3 Ne7 23.Be4 Ng6 24.Rfe1 Qc7 25.g3[/font] gives White complete command of the center (Kovacevic-Jaracz, Ol, Bled, 2002).

If [font color="magenta"]18.e5 Nd7 19.f4[/font] then:

[font color="magenta"]19...c4 20.bxc4 Rc6 21.Qh3 Nb6 22.Bd3 g6[/font] then:

If [font color="magenta"]23.Rf3 Re8 24.cxd5 Rxc3[/font] then:

[font color="magenta"]25.Bxg6 hxg6 26.Rxc3 Bc5+ 27.Kh1 Nxd5 28.Rc4[/font] gives White more freedom; the Queen can navigate most of the third rank (Spoelman-van der Werf, Op, Hoogeveen, 2003).
[font color="purple"]25.d6 Bxd6 26.exd6 Rc6 27.Qh6 Nd7 28.f5[/font] gives White more freedom and more space (Lobron-Stellwagen, IT B, Wijk aan Zee, 2004).

[font color="hotpink"]23.f5 exf5 24.Rxf5 Qe6 25.cxd5 Nxd5 26.Bd2 Bc5+[/font] is equal (Voenen-Haba, Euro Club Cup, IT, Ohrid, 2009).

If [font color="darkorange"]19...f5[/font] then:

[font color="darkorange"]20.exf6 Bxf6 21.Bxf6 Nxf6 22.Bf3 Kh8 23.Rae1 a5 24.Re2[/font] gives White a fair advantage by targeting the backward pawn (Kasparov-Lautier, Rpd IT, Cannes, 2001).
[font color="purple"]20.Qh3 c4 21.bxc4 Qc5+ 22.Kh1 d4 23.Rad1 dxc3 24.Rxd7[/font] gives White a fair advantage (Z. Almasi-Delchev, Croation ChT, Pula, 2001).

If [font color="magenta"]15.b3 Nxe4 16.Bxg7 Rg8[/font] then:

If [font color="magenta"]17.Be5 Bd6 18.Bg3 Nxg3 19.fxg3[/font] then:

[font color="magenta"]19...Be5 20.Rb1 Ke7 21.Bd3 Rg5 22.Qf3[/font] ([/font] gives White a small advantage in space (Azarov-Banikas, Euro ChT, León, 2001).
[font color="purple"]19...f5 20.Bc4 Be5 21.Qh5+ Kd8 22.Rae1 Bd4+ 23.Kh1[/font] is equal (Sadvakasov-Neverov, Aeroflot Op, Moscow, 2004).

[font color="darkorange"]17.Bb2 Bf6 18.Bxf6 Nxf6 19.Qd2 Qc6 20.g3[/font] draw (Kononenko-Oral, Op, Pardubicve, 2003).

If [font color="magenta"]9...0-0 10.Nxc6 bxc6 11.Nb6 Rb8 12.Nxc8 Rfxc8 13.Bxa6[/font] then:

If [font color="magenta"]13...Rf8 14.Bd3 Bd6 15.f4 e5[/font] then:

If [font color="magenta"]16.f5 Rxb2 17.g4 Qa5 18.g5[/font] then:

If [font color="magenta"]18...Ne8[/font] then:

If [font color="magenta"]19.Bc1 Rxa2 20.Bb2 Rxa1 21.Qxa1 Bb4 22.c3 Qxa1 23.Rxa1 Bd6 24.Ra6 h6 25.Bc1 hxg5 26.Bxg5 Nf6 27.Bxf6[/font] draw (Ehlvest-Illescas Córdoba, French League, France, 1989).
If [font color="darkorange"]19.Kh1 Bc5[/font] then:

[font color="darkorange"]20.Bc1 Rxa2 21.Bb2 Rxa1 22.Qxa1 d6 23.c3 Qxa1 24.Rxa1 h6 25.Bc1 hxg5 26.Bxg5 Nf6 27.Bxf6[/font] draw (Ehlvest-Illescas Córdoba, French League, France, 1990).
If [font color="purple"]20.Bxc5 Qxc5 21.Qh5 f6[/font] then:

[font color="purple"]22.Rg1 d5 23.Rg4 fxg5 24.Qxg5 Rb7[/font] gives Black more space and freedom; White has a passed pawn, but it doesn't for much at the moment (Brajovic-D. Mastrovasilis, Euro Ch, Budva, 2009).
[font color="hotpink"]22.Rf3 fxg5 23.Qxg5 Nf6 24.Rg3 Rf7 25.Qe3 Qc3[/font] gives Black a clear advantage (Ohme-Guichard, World ChTW, Novi Sad, 2009).

If [font color="darkorange"]18...Bc5[/font] then:

If [font color="darkorange"]19.gxf6 Bxe3+ 20.Kh1 gxf6 21.Qg4+ Kh8 22.Rg1 Bg5 23.h4 Bh6[/font] then:

[font color="darkorange"]24.Rg2 Rbb8 25.Qh5 Be3 26.Rag1 Qc5 27.a4 Qe7 28.Rg7 h6 29.R1g5 Rb1+ 30.Kh2[/font] Black resigns (Danin-Demianjuk, Chigorin Mem Op, St. Petersburg, 2009).
[font color="purple"]24.Rg3 Qd2 25.Rag1 Rbb8 26.Bc4 d5 27.exd5 cxd5 28.R3g2 Qa5 29.Bb3 Qc5 30.Qh5 Be3 31.Rg7 h6 32.R1g5[/font] Black resigns ahead of mate (Papaionnou-Kveinys, Euro ChT, Plovdiv, 2003).

[font color="hotpink"]19.Bxc5 Qxc5+ 20.Kh1 Ne8 21.Qh5[/font] transposes into [font color="hotpink"]Ohme-Guichard,[/font] above.

If [font color="darkorange"]16.b3 exf4 17.Bd4 f3[/font] then:

If [font color="darkorange"]18.e5[/font] then:

If [font color="darkorange"]18...f2+ 19.Rxf2 Bxe5 20.Bxe5 Qxe5[/font] then:

If [font color="darkorange"]21.Rf1[/font] then:

[font color="darkorange"]21...Rbe8 22.a4 Nd5 23.Qf3 Ne3 24.Rfe1 f5 25.a5 g5 26.a6[/font] give White an advance passed pawn and Black more space (Molina Rodriguez-Butkiewicz, Op, Cappelle-la-Grande, 2011).
[font color="burgundy"]21...h5 22.h3 d5 23.Qf3 Ne4 24.Qf4 Qd4+ 25.Kh2 Rbe8[/font] is equal (Perunovic-Ivanisevich, Serbia/Montenegro Ch, Kopaonik, 2005).

[font color="darkpink"]21.Kh1 Rbe8 22.Rf5 Qc3 23.Rf3 Qe5 24.Rf5 Qc3 25.Rf3 Qe5[/font] draw (Illescas Cordoba-Cramling, Op, Terrassa, 1990).

[font color="hotpink"]18...Bxe5 19.Bxe5 Qxe5 20.Qxf3 d5 21.Rae1 Qd6 22.a4[/font] gives White an extra pawn, passed, but no easy way to exploit the advantage (Zigangirova-Urosevic, World Youth Girls, Oropesa del Mar, Spain, 2001).

[font color="purple"]18.g3 Bxg3 19.Bxf6 gxf6 20.Rxf3 Bxh2+ 21.Kh1 Be5[/font] is equal (Rowson-Tregubov, Dutch ChT, 2001).

If [font color="darkorange"]13...Rd8 14.Bd3 Bd6[/font] then:

If [font color="darkorange"]15.Kh1 Be5[/font] then:

If [font color="darkorange"]16.c3 Rxb2 17.Qc1 Ng4 18.f4 Nxe3 19.Qxb2 Bxf4 20.Qf2 Nxf1[/font] then:

If [font color="darkorange"]21.Rxf1 g5 22.g3 Qd6 23.Be2 Be5 24.Qxf7+ Kh8 25.Rd1[/font] then:

If [font color="darkorange"]25...Qc7[/font] then:

[font color="darkred"]26.Bg4 d5 27.Qxe6 Bxc3 28.exd5[/font] gives White a passed pawn and more space (Tal-Liberzon, Euro ChT, Skara, 1980).
If [font color="darkorchid"]26.Qe7 Bxc3 27.Bg4 Qc8 28.Bxe6 Re8 29.Qc5[/font] is equal (Razuvaev-Matulovic, TM, Tbilisi, 1973).

If [font color="darkpink"]25...Qf8 26.Qxf8+ Rxf8 27.Rxd7 Bxc3 28.Bg4 Rf1+ 29.Kg2[/font] gives White a more remote passed pawn, but winning is not going to be easy (Johansen-Zhao Zong-Yuan, Doeberl Cup, Canberra, 2001).

If [font color="burgundy"]21...e5 22.g3 Qd6 23.Be2 Bg5 24.Bg4 Bf6 25.Rd1 Qc7 26.Rxd7 Rxd7[/font] leaves White down a piece and he resigns (Barnsley-Peschardt, Corres, 1997).

If [font color="hotpink"]16.f4 Bxb2 17.Rb1 e5 18.f5 d5 19.Bg5 Qd6[/font] gives Black stronger pawns and more space; White has a [assed pawn (Barlov-S. Marjanovic, IT, Belgrade, 1982).

If [font color="purple"]15.f4 e5 16.f5 Rxb2 17.g4[/font] then:

If [font color="purple"]17...h6 18.h4[/font] then:

[font color="purple"]18...Bf8 19.g5 Nd5 20.exd5 e4 21.Bf4 Qa7+[/font] is equal (Matulovic-Mariotti, ZT, Praia da Rocha, 1978).
If [font color="darkpink"]18...h5 19.gxh5 Be7 20.h6 d5 21.Qe2 Kh7[/font] is equal (Xu Jun-Ye Jiangchuan, Op, Beijing, 1991).

If [font color="hotpink"]17...Qa5 18.g5 Bc5 19.Bxc5 Qxc5+ 20.Kh1 Ne8 21.a4[/font] (Watson-Jansa, IT, Herning, Norway, 1991).

If [font color="darkred"]b) 6.g3 a6 7.Bg2 Nf6 8.0-0[/font] then:

If [font color="darkred"]8...Nxd4 9.Qxd4 Bc5[/font] then:

If [font color="darkred"]10.Bf4 d6 11.Qd2 h6 12.Rad1 e5 13.Be3[/font] then:

If [font color="darkred"]13...Bg4 14.Bxc5 dxc5 15.f3 Be6[/font] then:

If [font color="darkred"]16.f4[/font] then:

If [font color="darkred"]16...Rd8 17.Nd5 Bxd5 18.exd5 e4[/font] then:

[font color="darkred"]19.Rfe1 Rxd5 20.Rxe4+ Kd8 21.Qe2 Rxd1+ 22.Qxd1+[/font] gives White a slight advantage with power up the center from his heavy pieces (Fischer-Taimanov, Candidates' Match, Vancouver, British Columbia, 1971).
[font color="burgundy"]19.c4 0-0 20.Rfe1 Rfe8 21.Qc2 Re7 22.Bxe4[/font] (Karajica-Franklin, Op 7172, Hastings, 1971).

[font color="darkpink"]16...0-0 17.Nd5 Bxd5 18.exd5 exf4 19.d6 Qb6 20.c3 Rad8[/font] gives Black stronger pawns and a slight edge in space (Lobzhanidze-Landa, Geller Mem, Moscow, 1999).

If [font color="magenta"]16.Nd5 Bxd5 17.exd5 Qd6 18.f4 0-0 19.fxe5 Qxe5[/font] then:

If [font color="magenta"]20.d6 Qxb2 21.c4 Qxd2 22.Rxd2 Rab8 23.a4 Rfd8[/font] then:

[font color="magenta"]24.Re1 Kf8 25.Re5 Nd7 26.Re4 f6 27.Rb2 Re8[/font] gives Black an extra pawn, but White has a passer and more activity (Carlsen-Pelletier, IT, Biel, 2006).
[font color="darkorange"]24.Rb1[/font] then:

[font color="darkorange"]24...Nd7 25.Rxb7 Rxb7 26.Bxb7 Ne5 27.Rd5 Nxc4[/font] gives Black a fair advantage (Adams-Anand, IT A, Wijk aan Zee, 2001).
[font color="purple"]24...b6 25.Re1 Kf8 26.Bc6 Rbc8 27.Bb7 Rb8 28.Bxa6[/font] gives White an advance passed pawn backed by a Rook (Zatonskih-Alexandrova, Ukrainian ChW, Kramatorsk, 2001).

If [font color="darkorange"]20.c4 Qd6 21.Qf4[/font] then:

[font color="darkorange"]21...Rad8 22.Qxd6 Rxd6 23.b4 Rc8 24.Rc1[/font] is equal (Paoli-Damjanovic, IT, Firenze, Italy, 1972).
[font color="purple"]21...Rfd8 22.Qxd6 Rxd6 23.Rfe1 Kf8 24.Bh3[/font] gives White a small advantage in space (Guseinov-Hossain, Op, Kolkata, 2009).

If [font color="magenta"]13...Ke7[/font] then:

If [font color="magenta"]14.Bxc5 Qxc5 15.Na4[/font] then:

If [font color="magenta"]15...Qc6 16.f4 a5[/font] then:

If [font color="magenta"]17.Qd3 b5 18.Nc3[/font] then:

[font color="magenta"]18...Qc5+ 19.Kh1 Rb8 20.Nd5+ Nxd5 21.exd5[/font] draw (Valla-Haba, Czech Ch, Lazne Bohdanec, 1999).
[font color="burgundy"]18...b4 19.fxe5 Qc5+ 20.Kh1 dxe5 21.Nd5+ Nxd5 22.Qxd5 Qxd5 23.exd5[/font] gives White more space and an active Rook; Black has an extra pawn (Wedberg-Libndberg, Swedish Ch, Umea, 2003).

[font color="darkpink"]17.Nc3 Qc5+ 18.Kh1 Bg4 19.Rde1 Rac8 20.fxe5[/font] gives White more power in the center (Pashikian-Pelletier, Petrosian Mem, Stepanakert, 2004).

[font color="hotpink"]15...Qc7 16.f4 a5 17.Qe3 Ng4 18.Qb6 Qb8 19.Nc3[/font] (Navara-Netzer, Euroi ChTU18, Balatonlelle, Hungary, 2001).

[font color="purple"]14.f4 Be6 15.fxe5 dxe5 16.Nd5+ Bxd5 17.exd5 Rhd8 18.Kh1 Rac8[/font] gives White a passed pawn (Short-Anand, IT, Tilburg, 1991).

If [font color="magenta"]10.Qd3 d6 11.Bf4 Nd7[/font] then:

If [font color="magenta"]12.Na4 e5 13.Bd2 b5 14.Nxc5 Nxc5[/font] then:

If [font color="magenta"]15.Qa3 Bb7 16.Ba5 Qc6[/font] then:

If [font color="magenta"]17.Rad1 0-0 18.Rd5[/font] then:

If [font color="magenta"]18...f5 19.Rfd1 Nxe4 20.Qb3 Kh8[/font] then:

[font color="magenta"]21.Rxd6 Qc8 22.Rd7 Nc5 23.Bxb7 Nxb3 24.Bxc8 Nxa5[/font] gives White more activity (Adorjan-Timman, IT A, Wijk aan Zee, 1971).
[font color="purple"]21.Bxe4 fxe4 22.Rxd6 Qe8 23.Qe6 Qh5 24.Qe7 e3[/font] Black wins (Matulovi-Vasiukov, IT, Skopje, 1970; Sunnucks-Klosova, Corres, 1976).

If [font color="darkorange"]18...Qc8 19.Rxd6 Bxe4[/font] then:

[font color="darkorange"]20.f3!? Nb7! 21.fxe4 Nxa5 22.b3 Qxc2 23.Rd7 Qc6[/font] gives Black a slight advantage in space (Matulovic-Cvetkovic, Yugoslav Ch, Umag, 1972).
[font color="hotpink"]20.Rfd1 Bxg2 21.Kxg2 Nb7 22.R6d2 Re8 23.Kg1[/font] is equal,

If [font color="darkorange"]17.Rfd1 0-0 18.Rd5 Qc8 19.Rxd6[/font] then:

If [font color="darkorange"]19...Nxe4!? 20.Rb6![/font] (White has a small advantage, but the Rook is awkwardly placed at b6) [font color="darkorange"]20...f5[/font] then:

[font color="darkorange"]21.Qe7!? Rb8 22.Rd1!? Qxc2 23.Rf1 Rfe8[/font] gives Black the inbitiative more active pieces (Reshevsky-Vasiukov, , IT, Skopje, 1970).
[font color="purple"]21.Re1! Rb8 22.Bb4 Qxc2 23.Bxe4 Bxe4 24.Qxa6[/font] gives White activity all over the board.

[font color="hotpink"]19...Bxe4 20.Rad1 Bxg2 21.Kxg2 Nb7 22.R6d2[/font] remains equal.

[font color="darkpink"]15.Qc3 Bb7 16.a4 Qc6 17.axb5 axb5 18.Rxa8+ Bxa8 19.f3[/font] gives White the Bishop pair and more activity (Adams-Hernández, Ol, Palma de Mallorca, 2004).

[font color="darkorchid"]12.Rae1?! Ne5 13.Qe2 b5 14.Bc1 Bb7 15.Kh1 b4[/font] is equal (I. Zaitsev-E. Vasiukov, Blitz, Moscow, 1971).

If [font color="magenta"]b1) 8...Be7[/font] then:

If [font color="magenta"]9.Re1[/font] then:

If [font color="magenta"]9...0-0 10.Nxc6[/font] then:

If [font color="magenta"]10...dxc6 11.e5 Rd8[/font] then:

If [font color="magenta"]12.Qf3 Nd5 13.h4[/font] then:

If [font color="magenta"]13...Nxc3 14.Qxc3 Bd7 15.Bg5[/font] then:

If [font color="magenta"]15...Be8[/font] then:

If [font color="magenta"]16.Bxe7 Qxe7 17.Rad1[/font] then:

If [font color="magenta"]17...a5 18.Rxd8 Qxd8 19.a3[/font] then:

[font color="magenta"]19...Qc7 20.Rd1 Rd8 21.Rxd8 Qxd8 22.Be4 Qc7 23.b4[/font] gives White the advantage in space (Jansa-Paunovic, IT, Namestovo, 1987).
[font color="burgundy"]19...a4 20.Qe3 Qa5 21.Rd1 Qb5 22.Qc3 c5 23.Rd6[/font] gives White a comfortable advantage in space (Jansa-Poulsson, IT, Oslo, 1986).

If [font color="darkpink"]17...c5 18.Qb3 Rab8 19.Qb6 h6 20.Rd6 Rdc8 21.Red1[/font] gives White an overwhelming advantage (Berescu-Stoma, Euro Ch, Warsaw, 2005).

If [font color="darkorchid"]16.Rad1 Rxd1 17.Rxd1 Bf8 18.Be4 c5 19.b3 Rc8 20.a4[/font] draw (Dr. Hübner-Tal, Bundesliga 8990, Germany, 1990).

If [font color="#CAACDC"]15...Bxg5 16.hxg5 Be8 17.Be4 g6 18.b3 a5 19.Bf3[/font] gives White a fair advantage in space; Black has stronger pawns (Svidler-Landa, Russian ChT, Kazan, 1995).

If [font color="darkorange"]13...h6 14.Qg4 Kh8 15.Qh5[/font] then:

If [font color="darkorange"]15...Nxc3 16.bxc3 Bf8[/font] then:

[font color="darkorange"]17.Be4 b5 18.Bg5 Rd7 19.Rad1 Bb7 20.Rxd7 Qxd7[/font] is equal (Stanojoski-Matulovic, IT, Pancevo, 2003).
If [font color="purple"]17.Re4 b5 18.Rf4 Rd7 19.Rf6 Kg8 20.Be4 Bb7[/font] is equal (Prips-Vladimirov, IT, Simferopol, 1975).

If [font color="hotpink"]15...Bf8 16.Ne4 g6 17.Qf3 Nb4 18.Nd6 f5 19.Rd1[/font] gives White a powerful advantage in space (Delchev-Matulovic, IT, Subotica, 2003).

If [font color="darkorange"]12.Qe2 Nd5 13.Bd2[/font] then:

If [font color="darkorange"]13...b5 14.Rad1 Bb7[/font] then:

[font color="darkorange"]15.Nxd5 cxd5 16.c3 Rac8[/font] is equal (Hebden-Movsesian, IT 9697, Hastings, 1997).
If [font color="burgundy"]15.h4 c5 16.Nxd5[/font] draw (Ehlvest-Ribli, World Cup, Skelleftea, Sweden, 1989).

If [font color="hotpink"]13...Nxc3 14.Bxc3[/font] then:

[font color="hotpink"]14...b5 15.a4 b4 16.Bd2 Bb7 17.Red1 c5[/font] draw (Unzicker-M. Danjanovic, West German Op Ch, West Berlin, 1971).
[font color="purple"]14...Bd7 15.h4 c5 16.a4 Bc6 17.a5 Rd7 18.Bxc6[/font] is equal (Kholmov-Semkov, IT, Bulgaria, 1987).

If [font color="darkorange"]10...bxc6 11.e5 Nd5[/font] then:

If [font color="darkorange"]12.Qg4 f5 13.Qc4 Qb6 14.Na4 Qb5 15.Bf1[/font] then:

[font color="darkorange"]15...f4 16.Qe4 fxg3 17.hxg3 Qb4 18.b3 Qxe4 19.Rxe4[/font] gives White a small advantage in space (Tiviakov-Z. Rahman, Op, Calcutta, 1994).
[font color="purple"]15...Qxc4 16.Bxc4 Rb8 17.b3 Bb4 18.Re2 Nc3 19.Nxc3[/font] gives White the Bishop pair and more freedom (Gdanski-Dambrauskas, Rpd Op, Vilnius, 2010).

[font color="hotpink"]12.Na4 Rb8 13.c4 Nb6 14.Nxb6 Rxb6 15.b3[/font] gives White a small advantage in space (Nicevski-Matulovic, ZT, Athens, 1969).

If [font color="darkorange"]9...d6 10.Nxc6 bxc6 11.e5 dxe5 12.Rxe5[/font] then:

If [font color="darkorange"]12...0-0[/font] then:

If [font color="darkorange"]13.Bf4 Qb7[/font] then:

If [font color="darkorange"]14.Na4 Nd5 15.Bd2[/font] then:

If [font color="darkorange"]15...Bf6 16.Re4[/font] then:

If [font color="darkorange"]16...a5 17.Qe1[/font] then:

[font color="darkorange"]17...Qc7?! 18.a3 c5 19.c4 Ne7 20.Re2[/font] gives White command of open lines, stronger pawns, the Bishop pair, the initiative and more space (Paikidze-Monguntuul, Russian ChTW, Olginka, 2011).
[font color="burgundy"]17...e5 18.Rd1 Bf5 19.Rc4 h5 20.Qe2[/font] continues to give White a small advantage.

[font color="darkpink"]16...e5 17.c4 Ne7 18.Bc3 Bf5 19.Re1 Rfd8 20.Qb3[/font] gives White a strong initiative against Black's Queen (Movsesian-Suran, Op, Mlada Boleslav, 1993).

If [font color="purple"]15...Rb8!?[/font] then:

[font color="purple"]16.Rb1!? Rd8! 17.b3 Bf6 18.Re2[/font] is equal (Karpov-Dzuban, IT, Riga, 1988).
[font color="hotpink"]16.Qe2! Bd6 17.Re4 e5 18.c4[/font] gives White a small advantage in space.

If [font color="purple"]14.Re2 Rd8 15.Rd2[/font] then:

[font color="purple"]15...Rxd2 16.Qxd2 Nd5 17.Be5 a5 18.Rd1 Bd7 19.Na4[/font] gives White more freedom, stronger pawns and a pin at d5 (Fernández-Bjornsson, 1st Saturday July, Budapest, 2001).
[font color="hotpink"]15...Bd7 16.Na4 Be8 17.c4 Rxd2 18.Qxd2 Rd8 19.Qa5[/font] gives White domanance of the dark squares (Padevsky-Bobotsov, IT, Sofia, 1972).

[font color="burgundy"]13.Re1 Rd8 14.Qe2 Bb7 15.Bf4 Qb6 16.Ne4 Nd5 17.Bg5[/font] gives White a slight advantage; the pawn at b2 is protected by the threat of 18...Rab1!(Fonseca-Iturriaga, IT, Mexico City, 2010).

If [font color="hotpink"]12...Bb7[/font] then:

If [font color="hotpink"]13.Bf4 Bd6[/font] then:

If [font color="hotpink"]14.Rxe6+!! fxe6 15.Bxd6 Qd7[/font] then:

If [font color="hotpink"]16.Bc5 Qxd1+ 17.Rxd1 Rd8 18.Re1 Kf7 19.Ne4 Nxe4 20.Bxe4 Rhe8[/font] then:

[font color="hotpink"]21.Re3 Rd7 22.Rf3+ Kg8 23.Rb3 Red8 24.Rb6[/font] leaves White with an extra pawn, stronger pawns and a comfortable advantage in space in compensation for the exchange (Browne-Langeweg, IT, Amsterdam, 1972).
[font color="burgundy"]21.Kg2 e5 22.Re3 g6 23.Rf3+ Kg7 24.Rb3 Rd7 25.Rb6 Rc7 26.a4[/font] gives White activity and a apwn in compensation for the exchange (E. Vasiukov-Bobotsov, IT, Varna, 1971).

If [font color="#87095D"]16.Ba3 Qxd1+ 17.Rxd1 Rd8 18.Re1[/font] then:

[font color="#87095D"]18...Kd7 19.Na4 Kc7 20.Nc5 Bc8 21.Bb4 Rd4 22.Ba5+[/font] gives White an extra pawn and greater activity (R. Mamedov-Lin Chen, World Jr Ch, Gaziantep, Turkey, 2008).
[font color="darkpink"]18...Kf7 19.Na4 Rd2 20.Nc5[/font] gives White splendid minor pieces.

[font color="#CAACDC"]14.Rg5?! Bxf4! 15.gxf4 Rd8 16.Qe2 Qxf4 17.Rxg7 Rd2[/font] gives Black activive heavy pieces and the initiative (Schmid-Portisch, Adelaide, 1971).

If [font color="hotpink"]13.Re1 c5 14.Bf4 Qc8[/font] then:

If [font color="hotpink"]15.Bxb7 Qxb7[/font] then:

If [font color="hotpink"]16.b3 0-0 17.Qe2 c4 18.Ne4 Rfc8 19.Nd6 Bxd6 20.Bxd6[/font] then:

[font color="hotpink"]20...Qc6 21.Be5 Nd5 22.Bd4 Ne7 23.Rad1 Nf5 24.Ba1[/font] gives White power up the center and Black more space (L. M. Evans-Portisch, IT, Amsterdam, 1971).
If [font color="darkorchid"]20...cxb3 21.cxb3 Nd5 22.Be5 Rc6 23.Rad1[/font] is equal (Westerinen-Bobotsov, IT, Venice, 1971).

If [font color="darkpink"]16.Na4 c4 17.Qe2 Rc8 18.Be5 0-0 19.Rad1 Rfd8[/font] is equal (Browne-Langeweg, IT, Amsterdam, 1971).

If [font color="burgundy"]15.Na4 Bxg2 16.Kxg2 Qb7+ 17.Qf3 0-0-0 18.c4 Qxf3+ 19.Kxf3[/font] gives White a tad more activioty and a small advantage in space (Rodríguez Vila-A. Castro, Op, São Paulo, 1991).

If [font color="darkorange"]9.Be3 d6 10.f4 0-0[/font] then:

If [font color="darkorange"]11.Kh1[/font] then:

If [font color="darkorange"]11...Bd7 12.Nb3 b5 13.a3[/font] then:

If [font color="darkorange"]13...Rab8 14.g4[/font] then:

[font color="darkorange"]14...Ne8 15.Qd2 b4 16.axb4 Nxb4 17.Rf3 d5 18.e5[/font] gives White a fair advantage in space (Dr. Hübner-Rubinetti, Ol, Lugano, 1968).
If [font color="burgundy"]14...b4 15.axb4 Nxb4 16.g5 Ne8 17.Nd4 f6 18.Bh3[/font] gives White a strong advantage in space (Sokolsky-Bastrikov, Trmt, Sverdlovsk, 1942).

If [font color="hotpink"]13...b4 14.axb4 Nxb4[/font] then:

If [font color="hotpink]15.g4?! d5! 16.e5[/font] then:

[font color="hotpink"]16...Ne4?! 17.Nxe4! dxe4 18.Nd4[/font] should allow White to win the foremost e-pawn (Buseinov-Iotov, Euro Ch, Plovdiv, 2008).
If [font color="#CAACDC"]16...Nxg4! 17.Qxg4 Nxc2 18.Bd4 Nxa1 19.Rxa1 Rfb8[/font] gives Black stronger pawns and a slight material advantage (a Rook and two pawns against a two Knights), but White has more space.

If [font color="hotpink"]15.e5 dxe5 16.Bxa8 Rxa8 17.fxe5 Qxe5 18.Bd4[/font] is equal.

If [font color="purple"]11...Rb8 12.a4 Re8[/font] then:

If [font color="purple"]13.e5 dxe5[/font] then:

[font color="purple"]14.Nxc6 bxc6 15.fxe5 Nd5[/font] gives Black a better center and White more space (Vukcevich-Matera, Op, Reyjavik, 1976).
[font color="darkpink"]14.fxe5 Nxe5 15.Bf4 Nfd7 16.Nf3 f6 17.Qe2 g5[/font] gives Black an extra pawn, but after 18.Nxe5! Nx35 19.Bxe5 Qxe5 20.Qxe5 fxe5 it's not worth a lot (Solak-Paunovic, Yugoslav ChT, Herceg Novi, 2001).

[font color="hotpink"]13.Qe2 Bd7 14.Nb3 Na5 15.g4 Nxb3 16.cxb3 Bc6 17.g5[/font] gives White the initiative and more space (Topalov-Lautier, IT, Las Palmas, 1994).

If [font color="#CAACDC"]11.a4[/font] then:

[font color="#CAACDC"]11...Re8 12.Nb3 Nd7 13.g4 b6 14.g5 Nb4 15.Rf2[/font] gives White a slight advantage with more space on the kingside; Black has some compensation on the queenside (Ivanchuk-Bu Xiangzhi, World Cup, Khanty-Mansiysk, 2011).

[font color="hotpink"]11...Na5 12.Kh1 Nc4 13.Bc1 Rd8 14.Qe2 Nd7 15.b3[/font] gives White more space, not few opportunities to exploit it (Timofeev-Movsesian, IT, Sarajevo, 2005).

If [font color="magenta"]b2) 8...Bc5 9.Nxc6 dxc6 10.Na4[/font] then:

If [font color="magenta"]10...Ba7 11.c4[/font] then:

If [font color="magenta"]11...Nd7 12.b4[/font] then:

If [font color="magenta"]12...a5 13.b5 e5[/font] then:

[font color="magenta"]14.Rb1 Bd4 15.Bb2 c5 16.Bxd4 cxd4 17.c5 Nxc5 18.Qc2[/font] gives White a more active game for the pawn minus (Gelashvili-Miladinovic, Op, Corinth, 1988).
[font color="burgundy"]14.Bb2 0-0 15.Ba3 Re8 16.Bd6 Qd8 17.bxc6 bxc6[/font] gives White a small advantage in space (Tsanas-Komninos, Op, Athens, 2005).

If [font color="darkorange"]12...b5 13.Nb2 c5 14.Bd2 0-0[/font] then:

[font color="darkorange"]15.Qe2 cxb4?! 16.cxb5 Bc5 17.Rac1 Qb8 18.Rxc5 Nxc5 19.Bxb4[/font] gives White an extra pawn, a pin at c5 and more space (Felgaer-Vescovi, Rpd IT, Santos, Brazil, 2005).
[font color="purple"]15.Rc1 e5 16.Qe2 Qd6 17.Rfd1 Qe6 18.a3[/font] gives White the advantage in space (Thorhallson-Oral, Euro Club Cup, Panormo, 2001).

If [font color="darkorange"]11...b5 12.e5 Nd7[/font] then:

[font color="darkorange"]13.cxb5 axb5 14.Nc3 Ba6 15.Ne4 Nxe5 16.Bf4[/font] gives White a small advantage in space (Bojkovic-Peng, Euro Club Cup W, Reythymnon, 2003).
If [font color="purple"]13.Nc3 b4 14.Ne4 Nxe5[/font] then:

[font color="purple"]15.Bf4 0-0 16.c5 Bb8 17.Qd4 Nf3+ 18.Bxf3 e5 19.Bxe5 Qxe5 20.Qxb4[/font] gives White an extra pawn and the advantage in space (Adams-Plaskett, English ChT 9798, 1997).
[font color="hotpink"]15.Nd6+ Ke7 16.Ne4 Bb7 17.Qd2 Rhd8 18.Qg5+ Kf8[/font] gives Black an extra pawn and White more space (Timoshchenko-V. Smirnov, Op, Minsk, 1996).

If [font color="darkorange"]10...Be7 11.e5 Nd7 12.Re1 0-0 13.Bf4[/font] then:

[font color="darkorange"]13...Rd8 14.Qh5 Qa5 15.Nc3 Nf6 16.Qe2[/font] draw (Volzhin-Kobalia, Op, Novgorod, 1999).
If [font color="purple"]13...b5 14.Nc3[/font] then:

If [font color="purple"]14...Bb7?! 15.Ne4! Rfd8 16.Qh5[/font] then:

[font color="purple"]16...Re8?[/font] then White wins after [font color="purple"]17.Rad1 Qc8 18.Bg5 h6 19.Bxh6!! gxh6 20.Rxd7[/font] (Repkova-Ciuksyte, OlW, Torino, 2006).
[font color="darkpink"]16...g6 17.Qh6 Bf8 18.Qh4 c5 19.Bg5[/font] gives White an overwhelming advantage.

[font color="hotpink"]14...b4 15.Na4 Rd8 16.Qg4 Rb8 17.h4[/font] continues to give White a small advantage.

If [font color="darkred"]c) 6.f4 a6 7.Be2 b5[/font] then:

If [font color="darkred"]8.Nxc6[/font] then:

If [font color="darkred"]8...Qxc6 9.Bf3 Bb7 10.Be3 Rc8 11.a3[/font] then:

If [font color="darkred"]11...Qc4[/font] then:

If [font color="darkred"]12.Qd3 Nf6 13.0-0[/font] then:

If [font color="darkred"]13...Bc5 14.Bxc5 Qxd3 15.cxd3 Rxc5 16.Rac1[/font] then:

[font color="darkred"]16...0-0 17.Nd5 d6 18.b4 Rxc1 19.Nxf6+ gxf6 20.Rxc1[/font] gives White command of the open file, stronger pawns and more space (Dr. Nunn-Illescas Córdoba, IT, Linares, 1988).
[font color="burgundy"]16...d6?! 17.b4! Rc8 18.e5 Bxf3 19.exf6[/font] gives White a safer King, the initiative and more space; Black has stronger pawns, but it won't help a lot right now (Edelman-Wolff, Pan-Am Collegiate Ch, New Brunswick, New Jersey, 1988).

If [font color="magenta"]13...h5[/font] then:

If [font color="magenta"]14.h3 Bc5[/font] then:

[font color="magenta"]15.Bxc5 Qxc5+ 16.Rf2 e5 17.Nd5 Bxd5 18.exd5 exf4[/font] gives Black the advantage in space (Chandler-Benjamin, IT, Hastings, 1987).
[font color="purple"]15.Kf2 d5 16.exd5 Bxe3+ 17.Qxe3[/font] is equal.

[font color="darkorange"]14.Bd4 Be7 15.Rf2 Qxd3 16.cxd3[/font] gives White a slight advantage in space.

[font color="burgundy"]12.Be2 Qc7 13.0-0 Nf6 14.e5 Nd5 15.Nxd5 Bxd5 16.Bf3[/font] gives White a slight advantage after Black exchanges his light-bound Bishop (Unzicker-Suetin, Op, Bad Wörshofen, 1992).

If [font color="magenta"]11...Qc7 12.Qd4[/font] then:

If [font color="magenta"]12...Ne7[/font] then:

If [font color="magenta"]13.0-0-0 Nc6 14.Qb6 Qxb6 15.Bxb6 d6 16.Rd2[/font] then:

[font color="magenta"]16...g5 17.fxg5 Ne5 18.Bd4 h6 19.g6 fxg6 20.Bg4[/font] gives White a small advantage in space (Balashov-Taimanov, Op, Moscow, 1986).
[font color="darkpink"]16...Be7 17.Rhd1 b4 18.axb4 Nxb4 19.Rd4 Nc6 20.Ra4[/font] draw (Moldovan-Brodsky, Ciocaltea Mem, Bucharest, 1995).

[font color="burgundy"]13.Rd1 d6 14.Qd2 Nc6 15.Qf2 Be7 16.0-0 0-0 17.Bb6[/font] gives White a comfortable advantage (Mazzoni-Kupper, ZT, Enshade, 1963).

If [font color="darkorange"]12...h5 13.0-0 Nf6 14.h3 h4 15.Rad1[/font] then:

If [font color="darkorange"]15...Be7 16.e5 Nh5 17.Ne4 Bxe4 18.Bxe4 Ng3 19.Rf2[/font] is equal (Sigfusson-Maceija, Euro Club Cup, Rethymnon, Greece, 2003).
[font color="purple"]15...Nh5 16.Rf2 Bc5 17.Qxc5 Qxc5 18.Bxc5 Rxc5 19.Rfd2[/font] is equal (Arakhamia-Maceija, Euro Club Cup, Rethymnon, 2003).

If [font color="magenta"]8...dxc6 9.0-0 Bb7[/font] then:

If [font color="magenta"]10.Be3 Nf6[/font] then:

If [font color="magenta"]11.e5[/font] then:

If [font color="magenta"]11...Nd5 12.Nxd5 cxd5 13.Bd4[/font] then:

[font color="magenta"]13...g6 14.c3 Bc5 15.a4 Qb6 16.axb5 axb5 17.Bxc5 Qxc5+ 18.Qd4[/font] assures White of winning a pawn (Gómez Baillo-S. Chang, Op, São Paulo, 2003).
[font color="burgundy"]13...Bc5 14.c3 0-0 15.a4 b4 16.Rc1 Qb6 17.Bxc5 Qxc5+ 18.Qd4[/font] gives Black the Better Bishop (Plasket-Fuster, Marshall Op, New York, New York, 1979).

[font color="darkpink"]11...Rd8 12.Qe1 Nd7 13.Ne4 c5 14.Ng5 Be7 15.Qh4[/font] is equal (Aroshidze-Rasulov, Op, Baku, 2007).

If [font color="darkorange"]10...Be7 11.Qe1 b4 12.Na4 c5[/font] then:

If [font color="darkorange"]13.Bf3 Nf6[/font] then:

[font color="darkorange"]14.e5 Nd5 15.c4 bxc3 16.Nxc3 Nxe3 17.Qxe3 0-0[/font] is equal (Averjanov-Firman, IT, Kharkov, 2005).
[font color="purple"]14.Bf2 0-0 15.Qe3 Rac8 16.b3 Rfd8 17.Rad1 Rd4[/font] is equal (Sedlak-Rasulov, Euro Ch, Budva, 2009).

[font color="hotpink"]13.c3 Qa5 14.b3 Nf6 15.e5 Nd5 16.Bf3[/font] gives White a small advantage with more potential to use his space (Efimenko-Golopshchapov, Ukrainian Ch, Ordzhonikidze, 2001).

If [font color="darkorange"]10.Bf3 Bc5+ 11.Kh1 Ne7[/font] then:

[font color="darkorange"]12.f5 exf5 13.exf5 Nxf5 14.Bg4 Rd8 15.Qe2+[/font] gives White more activity and coordination for the pawn (Areshchenko-And. Volokitin, Ukrainian ChT, Alushta, 2004).
[font color="purple"]12.Qe2 0-0 13.Be3 Bxe3 14.Qxe3 c5 15.Rad1 Rfd8[/font] is equal (Dolomtov-And. Volokitin, Russian ChT, Sochi, 2004).

If [font color="magenta"]8.Be3 Bb7 9.a3[/font] then:

If [font color="magenta"]9...Nf6[/font] then:

If [font color="magenta"]10.0-0 Bc5[/font] then:

If [font color="magenta"]11.Qd3 b4 12.e5 Nxd4 13.Bxd4 bxc3 14.exf6 cxb2 15.fxg7 [/font] is equal (De Rosa-Sirkova, Euro Club Cup W, Plovdiv, 2010).
If [font color="burgundy"]11.e5!? Qb6!! 12.exf6 Nxd4 13.fxg7 Nxe2+ 14.Kh1 Rg8 15.Bxc5 Rxg7 16.Ne4 Bxe4 17.Qxe2 Qb7 [/font] gives White a strong initiative against the White King.

If [font color="darkorange"]10.Bf3 d6 11.0-0 Be7 12.Nb3 0-0 13.Qe1[/font] then:

If [font color="darkorange"]13...b4 14.axb4 Nxb4 15.Qf2[/font] then:

[font color="darkorange"]15...d5 16.e5 Nd7 17.Na5 [/font] is equal after 17...d4 (Sherwin-Benko, ITZ, Portoroz, 1958).
[font color="purple"]15...Rac8 16.Rad1 e5 17.Rd2 Qb8 18.Na5 Qa8 19.Nxb7 Qxb7 20.Qg3[/font] gives White a fair advantage in space (Postaman-Matulovic, IT, Netanya, Israel, 1961).

If [font color="hotpink"]13...Kh8!? 14.Rd1![/font] (the game is equal) [font color="hotpink"]14...Rac8 15.g4 Nd7 16.Qf2[/font] then:

If [font color="hotpink"]16...b4?! 17.axb4![/font] White has a small advantage in space) [font color="hotpink"]17...Nxb4 18.Bg2 Nc6[/font] then:

[font color="hotpink"]19.Na4!? g5 20.fxg5 Nce5![/font] is equal (Tsirulnik -Nyzhnyk, Ukrainian ChU14, Odessa, 2007).
[font color="purple"]19.Qe2 Nb4 20.Rd2 h6 21.Ra1 Rb8 22.Na5[/font] continues to give White a small advantage in space.

[font color="darkpink"]16...h6! 17.Rd2 Na5 18.Nxa5 Qxa5[/font] remains equal.

[font color="darkorchid"]9...Na5 10.0-0 Nc4 11.Bxc4 Qxc4 12.f5 Nf6[/font] draw (Shivaji-Fedorowicz, Op, Berkeley, California, 2005).

If [font color="darkred"]d) 6.Ndb5 Qb8 7.Be3 [/font] then:

If [font color="darkred"] 7...a6 8.Bb6 axb5 9.Nxb5[/font] then:

If [font color="darkred"]9...Bb4+ 10.c3 Ba5 11.Nc7+[/font] then:

If [font color="darkred"]11...Qxc7 12.Bxc7 Bxc7[/font] (Black has three minor pieces for the Queen; the game is equal) [font color="darkred"]13.Qg4[/font] then:

If [font color="darkred"]13...g6[/font] then:

If [font color="darkred"]14.Bb5 Nge7[/font] then:

If [font color="darkred"]15.h4 h5 16.Qg5[/font] then:

[font color="darkred"]16...d5 17.a4 dxe4 18.Rd1 Nd5 19.c4 Nf4 20.Qc5[/font] is equal (Cornette-Blot, French ChT, Montpellier, 2001).
[font color="burgundy"]16...Be5 17.f4 f6 18.Qg3 Bc7 19.a4 Kf7 20.0-0[/font] gives White more space, concentrated on the kingside (Charochkina-Ovod, Russian ChW HL, Taganrog, 2011).

[font color="darkpink"]15.0-0 0-0 16.Qe2 d5 17.a4 Rd8 18.Rfd1[/font] gives White a slight advantage in space (Todorovic-Matulovic, IT, Pancevo, 2003).

If [font color="magenta"]14.Bd3[/font] then:

[font color="magenta"]14...Nge7 15.0-0 0-0 16.a4 d6 17.Qe2 Bd7 18.b4[/font] gives White a slight advantage in space (Vorobiov-Beshukov, Russian Ch, Krasnodar, 2002).
[font color="darkorange"]14...h5!? 15.Qe2 Nf6 16.0-0 g5 17.a4[/font] gives White an extra pawn (Kurnosov-Ivanisevic, Euro Ch, Istanbul, 2003).

If [font color="magenta"]13...Be5 14.f4 Nf6 15.Qf3 Bc7 16.Bd3[/font] then:

If [font color="magenta"]16...e5 17.f5 0-0[/font] then:

[font color="magenta"]18.0-0 Ne7 19.g4 d5 20.g5 Nxe4 21.f6 Ng6[/font] gives White stronger pawns and a concentration of force on the kingside; Black has more space (Bernard-Bernal Moro, Op 0809, Hastings, 2008).
[font color="darkpink"]18.g4 d5 19.g5 dxe4 20.Bxe4 Nxe4 21.Qxe4 g6[/font] is equal ( Mihalinec-Pavlidis, Euro Ch, Rijeka, 2010).

If [font color="darkorange"]16...d6?![/font] then:

[font color="darkorange"]17.0-0!? h5 18.Qg3 Kf8 19.Rfe1 Bd7 20.b4 Ra3[/font] gives Black more freedom (Getz-Vinas Guerrero, Op, Gibraltar, 2008).
[font color="purple"]17.g4! h6 18.a4 Bd8 19.b4[/font] gives White a clear advantage in space.

If [font color="magenta"]11...Kf8? 12.Nxa8! Qxa8[/font] then:

If [font color="magenta"]13.Qd6+ Nge7 14.Qa3[/font] then:

[font color="magenta"]14...f5 15.b4 fxe4 16.bxa5 Kf7 17.Qd6 Nd5 18.Bc4[/font] White wins (Ponomariov-Ivanisevich, Euro ChT, Batumi, Georgia, 1999).
[font color="burgundy"]14...Qb8 15.Bxa5 Qe5 16.Bb6 Qxe4+ 17.Be3 f5 18.0-0-0[/font] wins (Mosterman-Vedder, Op, Hoogeveen, 2009).

If [font color="darkorange"]13.Bc5+?! Nge7 14.Qd6[/font] then:

If [font color="darkorange"]14...Qb8!? 15.Qxb8 Nxb8 16.Bd6 Na6 17.Bxa6 bxa6[/font] gives Black two minor pieces for a Rook and a pawn (Trujillo Villegas-Mendoza, ZT, Santo Domingo, 2007).
If [font color="purple"]14...Bd8! 15.Bb5 Kg8 16.0-0[/font] then:

If [font color="purple"]16...h5 17.a4 h4 18.h3 Ng6 puts a stop to White's attack.[/font]
[font color="hotpink"]16...b6 17.Be3 Qb7 18.Bf4 f6 19.Qd3 Ng6[/font] is equal.

If [font color="magenta"]9...Ra5 10.Nc7+ Ke7[/font] then:

[font color="magenta"]11.Qd2?! Re5! 12.0-0-0 f6 13.Bd3 Kf7 14.f4 Bc5!![/font] gives White the choice of exchanging Bishops on c5 or giving up two minor pieces for Black's centralized Rook (Pavlov-Nyzhnyk, Nabakov Mem, Kiev, 2008).
[font color="darkorange"]11.Qd3 Nf6 12.Rd1 Ne8 13.Bxa5 Nxc7[/font] remains equal.

If [font color="magenta"]7...Nf6 8.f4[/font] then:

If [font color="magenta"]8...d6 9.Qf3 Be7 10.Bd3 0-0 11.0-0 a6 12.Nd4[/font] then:

If [font color="magenta"]12...Nxd4 13.Bxd4 e5 14.Bb6[/font] then:

If [font color="magenta"]14...exf4?! 15.Qxf4! Be6 16.Nd5 Bxd5 17.exd5 g6 18.Rae1[/font] then:

[font color="magenta"]18...Nh5? 19.Qh6! Bd8 20.Bd4 f6 21.g4 Qc8 22.gxh5[/font] Black resigns (Solomon-B. Watson, TT, Aukland, New Zealand, 2008).
[font color="burgundy"]18...Nxd5 19.Qf3 Nxb6 20.Rxe7 d5 21.Qf6[/font] still gives White a clear advantage.

[font color="darkpink"]14...Bd7 15.Rae1 Bd8 16.Bxd8 Qxd8 17.fxe5 dxe5 18.Nd5[/font] gives Black a choice between allowing the weakening of his kingside or allowing White to obtain a strong passer on d5.

[font color="darkorchid"]12...e5 13.Nf5 Bxf5 14.exf5 Rd8 15.Bc4 exf4 16.Bb6[/font] gives White a fair advantage in space (Shabalov-Nisipeanu, Aeroflot Op, Moscow, 2005).

If [font color="darkorange"]8...a6 9.e5 axb5 10.exf6 b4[/font] then:

If [font color="darkorange"]11.Nb5 b6[/font] then:

If [font color="darkorange"]12.fxg7 Bxg7 13.Bd3[/font] then:

[font color="darkorange"]13...Na7 14.Qg4 Bxb2 15.Rb1 Bf6 16.Rxb4 Ba6 17.0-0[/font] gives White the advantage in space; Black needs to exchange pieces (Nepomiachtchi-Grachev, Aeroflot Op Rd 5, Moscow, 2008).
[font color="purple"]13...0-0 14.0-0 Ba6 15.Rf3 f5 16.Rg3 Kh8 17.Bf1[/font] gives White stronger pawns and a safer King (Motylev-Grachev, Aeroflot Op Rd 6, Moscow, 2008).

[font color="darkpink"]12.Bd3 gxf6 13.f5 Ra5 14.fxe6 dxe6 15.0-0 Bd7[/font] is equal (Melnikova-Skripchenko, Euro ChW, Chisinau, Moldova, 2005).

If [font color="hotpink"]11.Qg4?![/font] then:

If [font color="hotpink"]11...g6!? 12.Nb5 b6 13.Bd3 Ra5 14.Qe2[/font] is equal (Smirnov-Novikov, Russian Ch HL, Krasnoyarsk, 2007).
[font color="darkpink"]11...bxc3! 12.fxg7 Rg8 13.gxf8Q+ Kxf8[/font] gives White a fair advantage in space.

6.Nxc6

If [font color="red"]6.Ndb5[/font] then:

If [font color="red"]6...Bb4[/font] then:

If [font color="red"]7.a3 Bxc3+ 8.Nxc3 d5[/font] then:

If [font color="red"]9.exd5[/font] then:

If [font color="red"]9...exd5 10.Bd3 0-0 11.0-0 [/font] then:

If [font color="red"]11...d4 12.Ne2 Bg4 [/font] then:

If [font color="red"] 13.Bg5 Qd6 [/font] then:

If [font color="red"] 14.Qd2 Bxe2 [/font] then:

If [font color="red"] 15.Qxe2 Rfe8[/font] then:

If [font color="red"]16.Qf3 Ne5 17.Qg3[/font] then:

If [font color="red"]17...Nh5 18.Qh3 Nxd3 19.Qxd3 Nf4 20.Bxf4 Qxf4 21.Rfe1[/font] then:

[font color="red"]21...h6 22.g3 Qc7 23.Rad1 Rac8 24.h4 a6 25.b4 Qc6 26.Rxe8+[/font] draw (Salgado López-Vila Gázquez, Euro ChU18, Herceg Novi, 2008).
[font color="burgundy"]21...g6 22.g3 Qf6 23.Rad1 Rxe1+ 24.Rxe1 Rc8 25.Qb3 Qf5 26.Re2 b6[/font] is equal (Alekseev-Lintchevski, Young Stars, "Kirishi, 2005).

[font color="darkpink"]17...h6 18.Bxf6 Qxf6 19.Rfe1 Nxd3 20.Qxd3 Qb6 21.b3[/font] is equal (Kovalevskaya-Gaponenko, Euro ChW, Warsaw, 2001).

If [font color="darkred"]16.Qd1 Ne5 17.Bh4 Qb6[/font] then:

[font color="darkred"]18.Rb1!? Rac8 19.Re1 Nxd3 20.Rxe8+ Rxe8 21.cxd3 h6[/font] gives Black a slight edge (Short-Wiedenkeller, IT, Esbjerg, Norway, 1984).
[font color="magenta"]18.Re1 h6 19.Bxf6 Qxf6 20.Qd2[/font] is equal.

If [font color="darkred"]15.Bf4 Qd5 16.Bxe2[/font] then:

[font color="darkred"]16...Rfe8 17.Rfe1 Rad8 18.Bd3 Ne5 19.Bxe5 Rxe5 20.Rxe5 Qxe5 21.Re1[/font] gives White the initiative and a small advantage in space (Leko-Grischuk, IT, Linares, 2001).
[font color="magenta"]16...Rac8 17.Rad1 Rfe8 18.Rfe1 Ne4 19.Bf3 Qf5 20.Qd3[/font] gives White a small advantage in space (Fierro Baquero-Peng, OlW, Dresden, 2008).

If [font color="darkred"]14.Re1 Rfe8 [/font] then:

If [font color="darkred"] 15.Qd2 Bxe2 16.Bf4 Qd7 [/font] then:

[font color="darkred"] 17.Bxe2 Ne4 18.Qd3 Qf5 19.g3 Qd7 20.Bf3 [/font] gives White a better center, stronger pawns and the Bishop pair against two Knights (Sadvakasov-al Modiaki, Asian Ch, Doha, 2003).
[font color="darkorange"]17.Rxe2 Rxe2 18.Qxe2 Re8 19.Qf1 [/font] gives White healthier pawns and the Bishop pair against two Knights in an open center (JKasparov-Grischuk, Rpd IT, Cannes, 2001).

[font color="magenta"]15.f3 Bh5 16.Nf4 h6 17.Nxh5 hxg5 18.Nxf6+ Qxf6 19.Qd2 Ne5 20.Re4 [/font] draw (Short-Chandler, IT, Hastings, 1987).

If [font color="darkred"]13.f3 Bh5 14.Bg5 Qd6 [/font] then:

If [font color="darkred"] 15.Qd2 Nd5 [/font] then:

[font color="darkred"] 16.Rad1 Qc5 17.b4 Qb6 18.Nf4 Nxf4 19.Bxf4 [/font] gives White stronger pawns, the Bishop pair and more space (Aronin-A. Zaitsev, Soviet Ch, Yerevan, 1962).
[font color="darkorange"]16.Nf4 Bg6 17.Nxd5 Qxd5 18.Bf4 Rfe8 19.Rfe1 [/font] gives White stronger pawns and the Bishop pair, but Black has a better center; the game is soon given up as a draw (Madl-Peng, Mindsports Rpd W, Beijing, 2008).

[font color="magenta"]15.Qe1 Bg6 16.Rd1 Rfe8 17.Qf2 Rad8 18.Rd2 [/font] is equal (Morky-B. Stein, IT, Guasdal, Norway, 1988).

If [font color="darkred"]11...h6 12.Bf4 d4 13.Ne2 [/font] then:

If [font color="darkred"]13...Qd5 [/font] then:

[font color="darkred"]14.Bg3 Bg4 15.f3 Bd7 16.Kh1 Rad8 17.Bh4 Qd6 18.Qd2 [/font] gives White stronger pawn, two active Bishops in an topen center and more space (Boleslavsky-Kan, Soviet Ch, Leningrad, 1947).
[font color="darkorange"]14.Ng3 Bg4 15.Qd2 g5 16.f3 Be6 17.Ne4 [/font] gives White stronger pawns, the Bishop square and a comfortable advantage in space (Geller-Ciric, TM, Belgrade, 1961).

[font color="magenta"]13...Nd5 14.Bg3 Qf6 15.Re1 Nde7 16.Nf4 Bf5 17.Bc4 [/font]gives White stronger pawns, the Bishop pair and a small advantage ins space (Geller-Winants, IT, Amsterdam, 1987).

If [font color="darkred"]9...Nxd5[/font] then:

If [font color="darkred"]10.Bd2 0-0 11.Qh5[/font] then:

If [font color="darkred"]11...Nf6 12.Qh4 Qd4[/font] then:

If [font color="darkred"]13.Qxd4 Nxd4 14.0-0-0 e5 15.Be3 Ng4 16.Bxd4 exd4 17.Rxd4 Nxf2 18.Rg1 Ng4[/font] then:

[font color="darkred"]19.Nd5 Ne5 20.Bb5 Ng6 21.Re1 Rb8 22.Bd3[/font] gives White a clear advantage in the center and in space (Suetin-Roizman, Belarus Ch, Minsk, 1961).
If [font color="burgundy"]19.Bc4 Ne5 20.Bd5 Re8 21.Nb5 Re7 22.c4[/font] gives White more space, but the position promises a sharp ending (Schmid-Stahlberg, IT, Yerevan, 1965).

If [font color="darkpink"]13.Bg5 Rd8 14.Qxd4 Rxd4 15.Bd3 b6 16.0-0-0[/font] gives White the Bishop pair and otherwise superior minor pieces; Black's Rook would do better to take a defensive post (Gufeld-Khasin, Soviet Ch, Tallinn, 1965).

If [font color="darkorchid"]11...Qf6 12.0-0-0 Nxc3 13.Bxc3 Qf4+ 14.Rd2 e5 15.Bb5[/font] gives White a strong initiative agaisnt Black's e-pawn (Matulovic-Kokkoris, ZT, Athens, 1969).

If [font color="magenta"]10.Nxd5[/font] then:

If [font color="magenta"]10...exd5 11.Bd3 Ne5[/font] then:

[font color="magenta"]12.0-0 Nxd3 13.Qxd3 0-0 14.Be3 Qf6 15.Bd4 Qg6 16.Qxg6 hxg6[/font] gives White stronger pawns, but the Bishops of opposite portend a draw (Trifunovic-Ivkov, Capablanca Mem, Havana, 1963).
If [font color="burgundy"]12.Be3 Nxd3+ 13.Qxd3 0-0 14.Rd1 Qf6 15.c3 Be6[/font] draw (Ivkov-Trifunovic, ZT, Wageningen, 1957).

If [font color="darkorange"]10...Qxd5 11.Qxd5 exd5[/font] then:

If [font color="darkorange"]12.Bf4 Bf5 13.0-0-0 0-0-0 14.Bb5[/font] then:

[font color="darkorange"]14...a6 15.Bxc6 bxc6 16.Rhe1 Rhe8 17.Rxe8 Rxe8 18.Be3[/font] is equal (Matulovic-Ciric, IT, Belgrade, 1963).
If [font color="burgundy"]14...Rhe8 15.Bxc6 bxc6 16.Rhe1 Kd7 17.c3 Rxe1 18.Rxe1 a6 19.Kd2 Be6 20.Be5[/font] draw (W. Schmidt-Doda, Rubinstein Mem, Polanica Adroj, 1968).

If [font color="hotpink"]12.Bd3[/font] then:

If [font color="hotpink"]12...Ne5 13.Bf4 Nxd3+ 14.cxd3 Bf5 15.Kd2 Kd7[/font] then:

If [font color="hotpink"]16.Rhe1 Rhe8 17.Rac1 Rac8 18.Rxc8 Rxc8 19.Re5 Be6[/font] is equal (Berg-Christiansen, Ol, Bled, 2002).
[font color="burgundy"]16.Rac1 Rac8 17.Rhe1 Rxc1 18.Rxc1 Rc8 19.Rxc8 Kxc8 20.Kc3[/font] gives White a slight advantage with the active King (Gipslis-Bogdanovic, Asztalos Mem, Pecs, 1964).

If [font color="darkpink"]12...0-0 13.Bf4 Re8+ 14.Kd2[/font] then:

[font color="darkpink"]14...Bd7!? 15.Rae1 Re6 16.Bg3 Rae8 17.f3[/font] gives White better pawns and the Bishop pair; the e-file is tense (Domnitz-Peretz, IT, Tel Aviv, 1966).
[font color="purple"]14...f6! 15.Rae1 Ne5 16.Bxe5 fxe5[/font] continues to give White a small advantage in space

If [font color="darkred"]9.Bd3[/font] then:

If [font color="darkred"]9...dxe4 10.Nxe4 Nxe4 11.Bxe4 Qxd1+ 12.Kxd1[/font] then:

If [font color="darkred"]12...Bd7 13.Be3[/font] then:

If [font color="darkred"]13...f5 14.Bf3 e5[/font] then:

If [font color="darkred"]15.Kc1 0-0-0[/font] then:

[font color="darkred"]16.Re1 Kc7 17.b3 Rhe8 18.g3 Nd4 19.Bxd4 exd4[/font] is equal (van der Wiel-Beckhuis, Op, Amsterdam, 2005).
[font color="darkpink"]15.b4 0-0-0 16.Kc1 Nd4 17.Bxd4 exd4 18.Re1 Rhe8[/font] is equal (Fischer-Ja. Bolbochán, IT, Mar del Plata, 1959).

[font color="burgundy"]16.b3 f4 17.Bd2 Nd4 18.Be4 Bc6 19.Bxc6 Nxc6[/font] gives Black an infinitesimal advantage (A. Muzychuk-Peng, OlW, Khanty-Mansiysk, 2010).

If [font color="magenta"]13...0-0-0 14.Kc1[/font] then:

[font color="magenta"]14...b6 15.a4 f5 16.Bd3 e5 17.f4 Kb7[/font] is equal (W. John-Sämisch, German Chess Congress, Hamburg, 1921).
[font color="darkorange"]14...Kb8 15.b4 e5 16.Kb2 f5 17.Bf3 h6 18.Rad1[/font] gives White more activity and space (Kavalek-Skacel, Czechoslovakian Ch, Kosice, 1961).

If [font color="magenta"]12...f5 13.Bxc6+ bxc6[/font] then:

[font color="magenta"]14.Bf4 Kf7 15.Kd2 Rd8+ 16.Kc3 Bb7 17.Rad1 c5[/font] draw (Pilnkik-Stahlberg, Op, Reykjavik, 1957).
If [font color="darkorange"]14.Re1 Kf7 15.c4[/font] then:

[font color="darkorange"]15...Ba6 16.b3 Rad8+ 17.Kc2 Bc8 18.Bg5 Rd7 19.Rad1[/font] gives White pressure in the middle, stronger pawns and more space (Strupunsky-Reichstein, Op, Virginia Beach, Virginia, 2001).
[font color="purple"]15...Re8 16.Bf4 Rd8+ 17.Bd2 Ba6 18.b3 Rd3 19.Kc2[/font] gives White better pawns and the initiative (Schmid-Ju. Bolbochán, Ol, Helsinki, 1952).

If [font color="magenta"]9...d4 10.Ne2 e5 11.0-0 0-0 12.h3[/font] then:

If [font color="magenta"]12...Re8 13.Ng3[/font] then:

If [font color="magenta"]13...Nd7[/font] then:

[font color="magenta"]14.Qh5 Nf8 15.f4 exf4 16.Bxf4 Ng6 17.Bd2 Nce5[/font] is equal (Carlsen-Nepomniachtchi, Tal Mem Blitz, Moscow, 2010).
[font color="burgundy"]14.f4 exf4 15.Bxf4 Nde5 16.Qh5 f6 17.b4 Be6[/font] is equal (Ponomariov-Korchnoi, Match, Donetsk,2001).

If [font color="darkorange"]12...Nd7[/font] then:

[font color="darkorange"]13.Ng3 Nc5 14.f4 Qh4 15.Qf3 exf4 16.Bxf4[/font] gives White the Bishop pair, one of which is the best piece on the board. and a slight advantage in space; Black's Queen should redeply as it cannot benetrat White's granite defense (Zawadzka-Gluszko, Euro Ch, Warsaw, 2005).

[font color="purple"]13...Be6 14.f4 exf4 15.Bxf4 Nd7 16.Qh5 g6 17.Qh6[/font] is equal (Calzetta Ruiz-Pavlidou, Euro ChW, Plovdiv, 2008).

[font color="darkpink"]13.f4 Nc5 14.f5 Nxd3 15.cxd3 f6 16.g4 Bd7[/font] locks up the kingside and center, but Black has better minor pieces on the queenside (Harikrishna-Zhang Pengxiang, Spanish ChT, San Sebastián, 2006).

If [font color="darkred"]7.Nd6+ Ke7 [/font] then:

If [font color="darkred"] 8.Bf4 e5 9.Nf5+ Kf8[/font] then:

If [font color="darkred"]10.Bg5 d5 11.exd5[/font] then:

[font color="darkred"]11...Bxf5 12.dxc6 Qxd1+ 13.Rxd1 bxc6 14.Bd3 Be6[/font] is equal (Babuljian-Chibukhchian, Ebralidze Mem, Tbilisi, 2007).
[font color="burgundy"]11...Qxd5 12.Ne3 Qa5 13.Nc4 Bxc3+ 14.bxc3 Qxc3+[/font] gives Black a clear advantage in space plus the initiative (Anderssen-L. Paulsen, Match, Leipzig, 1876).

If [font color="magenta"]10.Bd2[/font] then:

[font color="magenta"]10...d5 11.Ng3 d4 12.Nb1 Bxd2+ 13.Nxd2 h5 14.h4 Be6[/font] gives Black the advantage in the center (Caro-Maroczy, IT, Vienna, 1898).
If [font color="darkorange"]10...d6!? 11.Ng3! Be6[/font] then:

If [font color="darkorange"]12.Bd3!? h5 13.0-0[/font] then:

If [font color="darkorange"]13...Ng4?! 14.h3! Qh4[/font] then:

If [font color="darkorange"]15.hxg4??[/font] (disastrous) then after [font color="darkorange"]15...hxg4! 16.Re1 Nd4[/font] White is unable to avert mate and resigns (Zukertort-Schallop, German Chess Congress, Berlin, 1881).
[font color="burgundy"]15.Nf5 Bxf5 16.exf5 Nf6 17.a3[/font] gives White a fine game.

[font color="darkpink"]13...h4 14.Nf5 h3 15.g3 d5 16.exd5 Bxd5 17.Nxd5[/font] leads to Black having a small advantage in space.

[font color="purple"]12.a3 Bc5 13.Be2 g6 14.Bh6+ Kg8 15.Nd5[/font] gives White advantage in the center.

If [font color="magenta"]8.Nxc8+ Rxc8 [/font] then:

If [font color="magenta"] 9.Bd3 d5 10.exd5 Qxd5 11.0-0 [/font] then:

[font color="magenta"]11...Qh5 12.Qxh5 Nxh5 13.Bd2 Nf6 14.a3 Bd6 [/font] is equal (Keres-Trifunovic, IT, Moscow, 1947).
[font color="burgundy"]11...Bxc3 12.bxc3 Rhd8 13.Ba3+ Ke8 14.c4 Qa5 [/font] is equal (P. Li Ying-Shiomi, Ol, Palma de Mallorca, 2004).

If [font color="darkorange"]9.Bd2?! Bxc3 10.Bxc3 Nxe4 11.Bxg7[/font] then:

If [font color="darkorange"]11...Rg8[/font] then:

If [font color="darkorange"]12.Bd4? Qa5+ 13.c3 Nxd4 14.Qxd4 Nxc3[/font] then:

[font color="darkorange"]15.bxc3 Rxc3 16.Qd2 Rg5 [/font] White resigns (Trujillo Delgado-Moreno Tejera, Spanish ChU20, Mondariz Balneario, 2002).
[font color="purple"]15.Qd2 Qe5+ 16.Qe3 Ne4 17.Bd3 Nc5 18.Qxe5 Nxd3+[/font] leaves Black a piece to the good.

White might last longer after [font color="darkpink"]12.Qg4 d5 13.f3 Nb4 14.Qh4+ Kd7 .[/font]

[font color="hotpink"]11...Qa5+ 12.c3 Rhg8 [/font] gives Black the initiative and the advantage in space (Mason-Mieses, IT, Paris, 1900).

[font color="darkorchid"]6...d6 7.Bf4 e5 8.Bg5[/font] transposes into the Sveshnikov Defense. See Hou Yifan-Krush, ITW, Istanbul, 2008.

6...bxc6 7.e5 Nd5 8.Ne4 Qc7

If [font color="red"]8...f5 [/font] then:

If [font color="red"]9.exf6 9...Nxf6 10.Nd6+ Bxd6 11.Qxd6[/font] then:

If [font color="red"]11...Qb6 12.Bd3 c5[/font] then:

If [font color="red"]13.Bf4 Bb7 [/font] then:

If [font color="red"] 14.0-0 Rc8 15.c4[/font] then:

[font color="red"]15...Qxd6 16.Bxd6 Rc6 17.Be5 d6 18.Bc3 Kf7 19.f4 [/font] (Fuchs-Antonshin, Chigorin Mem, Sochi, 1966).
[font color="burgundy"]15...Rc6 16.Qe5 0-0 17.Rae1 Qd8 18.Bg5 Ra6 19.a3[/font] gives White more activity and more space (Hort-Anotonio, IT, Biel, 1991).

If [font color="darkred"]13.Qg3 0-0 14.0-0 Bb7 15.b3[/font] then:

[font color="darkred"]15...Rf7 16.Bg5 Raf8 17.Rae1 Nh5 18.Qh4 g6 19.Re3[/font] is equal (Ribli-Umansky, TM, Soviet Union, 1968).
[font color="magenta"]15...Rac8?! 16.Bb2 Rf7 17.c4 d5 18.f3 d4 19.Rfe1[/font] gives White stronger pawns and more space (Weinwurm-Zaric, World Sr Ch, Lignano, 2005).

[font color="darkpink"]14.0-0-0 Rc8 15.Qxb6 axb6 16.Bb5 Bc6 17.Bxc6 Rxc6[/font] is equal (Rooze-Kuyindzhi, World Sr Ch, Rijeka, 2011).

If [font color="darkred"]11...Ba6[/font] then:

If [font color="darkred"]12.Bxa6 Qa5+ 13.Bd2 Qxa6 14.Bb4 0-0-0[/font] then:

[font color="darkred"]15.a3 e5 16.0-0-0 Rhe8 17.Rhe1 Re6 18.Qc5[/font] gives White a small advantae in space (Negi-Safarli, Young Stars, Kirishi, Russia, 2007).
If [font color="magenta"]15.0-0-0 Qxa2 16.Rhe1[/font] then:

[font color="magenta"]16...Nd5?! 17.Rd3! Qc4 18.Bd2 Rhf8 19.f3 Nb6 20.Bg5[/font] gives White the initiative and a comfortable advantage in space; Black has an extra pawn, but White will win the exchange (Khalifman-Yakovich, Russian Ch HL, Novokuznetsk, 2008).
[font color="darkorange"]16...Qa1+ 17.Kd2 Qa2 18.Bc5 Ne8 19.Qd3 Nc7 20.Bd6[/font] is equal.

If [font color="magenta"]12.c4 Qb6 13.Qa3 c5 14.Be3[/font] then:

[font color="magenta"]14...d6 15.Qa4+ Kf7 16.Bd3[/font] gives White a small advantage in space (Dembo-Stepovia, Euro ChW, Dresden, 2007).
[font color="darkorange"]14...Rc8 15.Bd3!? 0-0 16.0-0 Ng4 17.h3 Nxe3 18.fxe3[/font] is equal (Sebag-Skripchenko, French ChT, Belfort, 2004).

If [font color="darkred"]9.Nd6+ Bxd6 10.exd6 0-0 11.Be2[/font] then:

[font color="darkred"]11...Qh4 12.c4 Nf6 13.g3 Qh3 14.Bf1 Qg4 15.Qxg4 Nxg4[/font] is equal. (Reggio-Mieses, IT, Monte Carlo, 1902).
[font color="magenta"]11...Qa5+ 12.Qd2 Qc5 13.c4 Nf6 14.b4 Qb6 15.c5[/font] gives White a slight advantage in space (Gattie-Bardeleben, IT, London, 1883).

9.f4 Qa5+

If [font color="red"]9...Qb6[/font] then:

If [font color="red"]10.c4 Bb4+[/font] then:

If [font color="red"]11.Ke2 f5 [/font] then:

If [font color="red"]12.Nf2[/font] then:

If [font color="red"]12...Ba6 13.Kf3 Ne7 14.Be3 Bc5 15.Bxc5 Qxc5 16.Qd6[/font] then:

If [font color="red"]16...Qb6 17.b3 c5 [/font] then:

If [font color="red"]18.Rd1 Bb7+[/font] then:

If [font color="red"] 19.Kg3 Kf7 20.Be2 Rhd8[/font] then:

[font color="red"]21.Bh5+ g6 22.Bf3 Bxf3 23.gxf3 Rac8 24.Qd2 Rc6 [/font] is equal (Adams-Dr. Nunn, IT, Kilkenny, 1996).
[font color="burgundy"]21.Nd3 Rac8 22.Qxb6 axb6 23.Nb2 Bc6 24.Rd2 Ra8[/font] is equal (Negi-Pileckis, World Jtr Ch, Istanbul, 2005).

[font color="darkpink"]19.Ke3 Kf7 20.Qxb6 axb6 21.Rxd7 Bc6 22.Rd2[/font] gives White more freedom; he went on to score an upset win (Chandler-Kasparov, SX, Hamburg, 1985).

If [font color="darkred"]18.Be2 Kf7[/font] then:

[font color="darkred"]19.Ke3 Bb7 20.Bf3 Bxf3 21.gxf3 Rhd8[/font] is equal (Fressinet-Zhu Chen, IT B, Wijk aan Zee, 2004).
[font color="magenta"]19.Rhd1 Rhd8 20.Ke3 Bb7 21.Bh5+ Kf8 22.Bf3[/font] gives White a slight advantage in space (Adams-Ivanchuk, Rpd, Frankfurt, 2000).

If [font color="darkred"]16...Qa5?![/font] then:

[font color="darkred"]17.h4 c5 18.Kg3 Rc8 19.Be2 Nc6 20.Bh5+ g6 21.Bf3 Nd4 22.b4 Qa3 23.bxc5[/font] is equal (Pirisi-Krasenkow, IT, Balatonbereny, 1988).
[font color="magenta"]17.Be2 Rd8 18.Rhd1 g5 19.b3 Qb6 20.fxg5[/font] gives White an overwhelming advantage (N. Kosintseva-Cmilyte, Rpd World Cup W, Konya, Turkey, 2009).

If [font color="darkred"]12...Bc5 13.Nd3 Ne3 14.Qb3 Nxf1[/font] then:

If [font color="darkred"]15.Qxb6 Bxb6 16.Rxf1[/font] then:

If [font color="darkred"]16...Ba6 17.b3 Rc8[/font] then:

[font color="darkred"]18.Ba3 c5 19.Rad1 Bb7 20.Rg1 h6 21.h4[/font] (Kholmov-Sveshnikov, Soviet Ch ½-final, Volgodonsk, 1983).
[font color="purple"]18.Be3 Bxe3 19.Kxe3 c5 20.Rf3 Rg8 21.Rg3[/font] gives White a clear advantage in space (Petr-Frolik, Czech ChT 0405, 2005).

[font color="darkorange"]16...Rg8?! 17.Be3 Rb8! 18.b3 Bb7 19.g3 Rc8 20.Bc5[/font] gives White an overwhelming advantage in space (Marjanovic-Vukic, Yugoslav Ch, Vrbas, 1982).

[font color="magenta"]15.Rxf1 d5 16.exd6 Bxd6 17.Qxb6 axb6 18.b3 c5[/font] is equal (Zherebukh-S. Ivanov, Chigorin Mem Op, St. Petersburg. 2009).

If [font color="darkred"]12.exf6 Nxf6 13.Be3[/font] then:

If [font color="darkred"]13...Qa5 14.Nxf6+ gxf6 15.Kf2[/font] then:

If [font color="darkred"]15...0-0 16.Bd3 Rf7[/font] then:

If [font color="darkred"]17.a3 Bf8 18.Rf1 d5 19.Kg1 Bc5 20.Bf2[/font] then:

[font color="darkred"]20...Bd6 21.Kh1 Qc7 22.Bg3 a5 23.Rc1 Qb8 24.Rc2[/font] gives White stronger pawns (Antonov-Hamarat, Corres, 1984).
[font color="burgundy"]20...Qb6 21.Bxc5 Qxc5+ 22.Kh1 a5 23.Rf3 Qe7 24.Qe2[/font] gives White a small advantage in space (Tseshkovsky-Kouatly, IT, Trnava, 1986).

[font color="darkpink"]17.Qe2 Bc5 18.a3 Bxe3+ 19.Qxe3 Qb6 20.b4[/font] gives White a fair advantage in space (Nijboer-Kharlov, Op, Leeuwarden, 1992).

[font color="darkorchid"]15...Ke7 16.Qd4 d6 17.Be2 Bc5 18.Qd3 Rb8 19.b3[/font] gives White a small advantage in space (Burua-Thipsay, Indian Ch, Mumbai, 2003).

If [font color="magenta"]13...Qd8 14.Nd6+ Bxd6 15.Qxd6 Bb7 16.Kd1[/font] then:

If [font color="magenta"]16...c5 17.Qxc5 Be4[/font] then:

[font color="magenta"]18.Qd6 Rc8 19.Bxa7 Rc6 20.Qb8 Rc8 21.Qd6[/font] is equal (Najer-Khairullin, Euro Ch, Plovdiv, 2008).
[font color="purple"]18.Bd2 Rc8 19.Qa3 d6 20.Ke1 0-0 21.Rd1 d5[/font] is equal (Akopian-Radjabov, Euro ChT, Crete, 2007).

[font color="darkorange"]16...Qe7 17.Qxe7+ Kxe7 18.Be2 a5 19.Kc2 d5 20.b3[/font] gives White stronger pawns, the Bishop pair and a comfortable advantage in space (Svidler-Leko, World ChT, Yerevan, 2001).

If [font color="darkred"]10...Ne3 11.Qd3[/font] then:

If [font color="darkred"]11...Bb4+ 12.Bd2 Ba6 13.b3 0-0[/font] then:

If [font color="darkred"]14.Bxb4 Qxb4+ 15.Kf2 Nd5 16.g3 f6[/font] then:

[font color="darkred"]17.Qc2 Nxf4 18.gxf4 fxe5 19.Kg2 Rxf4 20.Bd3 d5[/font] is equal (Fedorchuk-Sprenger, Bundesliga 0708, Remagen, 2008).
[font color="burgundy"]17.Qd2 fxe5 18.cxd5 Qxe4 19.Bxa6 exf4 20.g4 cxd5[/font] is equal (Petr-Biolek, Czech ChT, 2008).

[font color="darkpink"]14.Rc1 f5 15.exf6 gxf6 16.Bxb4 Qxb4+ 17.Qd2[/font] gives White more freedom (Caruana-Todorovic, 1st Saturday, Budapest, 2007).

If [font color="magenta"]11...Nf5 12.g4 Nd4[/font] then:

If [font color="magenta"]13.Bg2 h5 14.g5 Bb7[/font] then:

[font color="magenta"]15.Be3!? Nc2+ 16.Kf2 Nxe3 17.Qxe3 Qxb2+ 18.Kg3 Ba6[/font] is equal (Kasparov-Illescas Córdoba, IT, Linares, 1992).
[font color="purple"]15.Bd2 c5 16.Bc3 Nf5 17.0-0-0 0-0-0 18.Qd2[/font] gives White a substantial advantage ion space (Meier-B. Socko, Euro Club Cup, Kallithea, 2008).

[font color="darkorange"]13.b3 Bb7 14.Be3 Nc2+ 15.Kf2 Nxe3 16.Qxe3 Qxe3+ 17.Kxe3[/font] gives White a small advantage in space (Hector-van der Wiel, TM, Haninge, Sweden, 1990).

If [font color="darkred"]10.Bd3[/font] then:

If [font color="darkred"]10...Ba6 11.Bxa6 Qxa6 12.Qe2[/font] then:

If [font color="darkred"]12...Qxe2+ 13.Kxe2 f5 14.Nf2[/font] then:

If [font color="darkred"]14...Rb8[/font] then:

[font color="darkred"]15.c4 Nb4 16.b3 Bc5 17.Rd1 a5 18.Bd2 Ke7 19.Nd3[/font] gives White a small advantage in space.(van der Wiel-Chandler, IT, Amsterdam, 1987).
[font color="burgundy"]15.Rd1 g5 16.fxg5 Bg7 17.Nd3 Nb4 18.Nc5 Nxc2[/font] is equal (van der Wiel-Ligterink, ZT, Budel, 1987).

[font color="darkpink"]14...d6 15.Nd3 dxe5 16.Nxe5 Bd6 17.c4 Ne7 18.Rd1[/font] gives White a fair advantage in space (Levy-Day, Ol, Buenos Aires, 1978).

If [font color="magenta"]12...Qb6 13.c4 Bb4+ 14.Kf1[/font] then:

[font color="magenta"]14...f5 15.Nf2 Ne7 16.Nd3 Bc5 17.Nxc5 Qxc5 18.Be3[/font] gives White more activity and a more permanent advantage in space(Dr. Nunn-Binham, IT, Helsinki, 1981).
[font color="darkorange"]14...Ne7 15.a3 Qa6 16.Rb1 Ba5 17.Be3[/font] gives White a substantial advantage in space.

If [font color="magenta"]10...Be7 11.Qe2[/font] then:

If [font color="magenta"]11...f5 12.exf6 Nxf6 13.c3[/font] then:

[font color="magenta"]13...Nxe4 14.Bxe4 Ba6 15.Qh5+ Kd8 16.Qf3[/font] draw (Yudasin-Kharlov, Rpd IT, Oviedo, 1993).
[font color="darkorchid"]13...Rb8 14.Nd2 d5 15.Nf3 0-0 16.Rb1 a5 17.Ne5[/font] is equal (Alaverdyan-Savurko, World Jr ChGirls, Yerevan, 2006).

If [font color="darkorange"]11...0-0 12.c4[/font] then:

If [font color="darkorange"]12...f5?! 13.cxd5 fxe4 14.Qxe4[/font] then:

If [font color="darkorange"]14...Qb4+ 15.Qxb4 Bxb4+ 16.Bd2[/font] then:

If [font color="darkorange"]16...Bxd2+ 17.Kxd2[/font] then:

[font color="darkorange"]17...exd5 18.g3 a5 19.Rhc1 Ba6 20.e6 dxe6 21.Rxc6 Bxd3 22.Kxd3 g5 23.Rxe6 gxf4 24.gxf4[/font] draw (Spassky-AdorjanIT, Baden-Baden. 1980).
[font color="burgundy"]17...cxd5 18.g3 a5 19.Rhc1 g5 20.Rc7 gxf4 21.gxf4 Rxf4 22.Rg1+[/font] is equal (van der Wiel-Romero Holmes, Op, Wijk aan Zee, 1995).

[font color="darkpink"]16...Rxf4 17.Bxb4 Rxb4 18.dxe6 dxe6 19.0-0-0 c5 20.b3 Bb7 21.Bc4[/font] gives White slightly stronger pawns and a small asvantage in space (Matulovic-Vukic, Yugoslav ChT, Tivat, 1995).

[font color="hotpink"]14...g6?! 15.dxe6 dxe6 16.Be3 Bc5 17.Bxc5 Qxc5 18.Bc4[/font] gives White stronger pawns and a comfortable advantage in space.

[font color="purple"]12...Nb4! 13.Bb1 Ba6 14.a3 Nd5 15.Qc2[/font] gives White a better center; Black has more space.

10.c3

If [font color="red"]10.Bd2 Qb6 11.Bd3[/font] then:

If [font color="red"]11...Be7 12.Qe2[/font] then:

If [font color="red"]12...a5[/font] then:

If [font color="red"]13.c4 f5 14.exf6 Nxf6[/font] then:

[font color="red"]15.Ng5 Qxb2 16.0-0 Bb4 17.Rad1 0-0 18.Qe5 Rb8[/font] is equal (Tseshkovsky-Pilavov, IT, Krasnodar, 2001).
[font color="burgundy"]15.Bc3 Nxe4 16.Bxe4 Bb4 17.Qh5+ Kf8 18.Qf3 d5[/font] is equal (Ye Jiangchuan-Peng Xiaomin, IT, Shanghai, 2000).

If [font color="darkred"]13.a3 Rb8 14.c4 Qxb2[/font] then:

[font color="darkred"]15.0-0?! Qd4+ 16.Kh1 Ba6 17.Rad1 Rb3 18.Rf3 a4[/font] gives Black a fair advantage in space (Gashimov-Filippov, Dubai, 1996).
[font color="magenta"]15.Rc1! f5 16.Nf2 Nb6 17.0-0 Bc5 18.Rb1[/font] remains equal.

If [font color="darkred"]12...Rb8[/font] then:

[font color="darkred"]13.c4!? f5! 14.exf6 Nxf6 15.Nc3 0-0 16.Na4[/font] gives White a small advantage in space (Svidler-Lobron, Rpd Op, Frankfurt, 2000).
[font color="magenta"]13.b3 0-0 14.c4 Ba6 15.Rd1 f5 16.exf6 Nxf6[/font] is equal (T. Kosintseva-M. Muzychuk, Euro ChW, Rijeka, 2010).

If [font color="darkred"]11...Ba6?! 12.Bxa6! Qxa6[/font] then:

If [font color="darkred"]13.Qe2 Qxe2+ 14.Kxe2 f5 15.Nf2 Be7 16.c4 Nb6[/font] then:

[font color="darkred"]17.Rhc1 h6 18.Nd3 g5 19.a4 Rb8 20.b4[/font] gives White a comfortable advantage in space, concentrated on the queenside (Tseshlovsky-Beshukov, IT, Krasnodar, 1999).
[font color="burgundy"]17.b3 Rg8 18.h4 0-0-0 19.Be3 h6 20.g4[/font] gives White a comfortable advantage in space, concentrated on the kingside (Belyakov-Kljucharev, Russian ChT, Olginka, 2011).

If [font color="magenta"]13.b3 Qb6 14.Qe2[/font] then:

[font color="magenta"]14...f5?! 15.exf6 Nxf6 16.Nxf6+ gxf6 17.Qh5+[/font] gives White a tremendous advantage (Hector-Ziegler, IT, Goteborg, 1999).
[font color="darkorange"]14...Bc5 15.c4 Ne7 16.Nxc5 Qxc5 17.0-0-0[/font] gives White a comfortable advantage in space.

10...Be7

If [font color="red"]10...Ba6 11.Bxa6 Qxa6[/font] then:

If [font color="red"]12.Qe2 Qxe2+ 13.Kxe2 f5 14.Nf2[/font] then:

[font color="red"]14...d6 15.Nd3 c5 16.c4 Nb6 17.exd6 Nxc4 18.Nxc5[/font] gives White an advanced passed pawn (Chandler-T. Horvath, Bundesliga 9495, Germany, 1995).
[font color="burgundy"]14...a5 15.Nd3 Be7 16.Bd2 Kf7 17.a4 Rhb8 18.c4[/font] gives White a slight advantage in space (Nijboer-Rogozenko, Euro ChT, Debrecen, 1992).

If [font color="darkred"]12.b3[/font] then:

If [font color="darkred"]12...0-0-0?! 13.c4 Bb4+ 14.Bd2 Ne3 15.Qe2 Nc2+[/font] then:

If [font color="darkred"]16.Kf2?! d5 17.exd6 Bxd6 18.Rad1 Nd4 19.Nxd6+ Rxd6[/font] is equal (Hector-Kharlov, TM, Haninge, Sweden, 1992).
If [font color="magenta"]16.Kd1! Nxa1 17.Bxb4 Nxb3[/font] then:

[font color="magenta"]18.Qb2! Qb6 19.Qxb3 Qd4+ 20.Nd2[/font] gives White two minor pieces for a Rook and a pawn and more activity; Black's Rooks will be difficult to develop.
[font color="darkorange"]18.axb3? Qa1+! 19.Kc2 Qxh1[/font] gives Black a big material advantage.

[font color="darkorchid"]12...Qb6 13.Qe2 f6 14.exf6 gxf6 15.Bd2 f5 16.Ng5[/font] is equal.

11.Bd3 f5!?

If [font color="red"]11...Qb6 12.c4 f5[/font] then:

[font color="red"]13.Ng5 Ne3 14.Qf3 Nd5 15.Qd1 Ne3 16.Qf3 Qb4+ 17.Ke2[/font] is equal (Wei Yi-Karthikeyan, World Youth, Porto Carras, Greece, 2010).
[font color="darkred"]13.exf6!? Nxf6 14.Qc2 Nxe4 15.Bxe4 Ba6[/font] gives Black a small advantage in space (Ye Jiangchuan-Ivanchuk, Ol, Manila, 1992).

12.Nf2!? (N)

[font color="red"]12.exf6 Nxf6 13.0-0 0-0 14.Nxf6+ Bxf6 15.Be3[/font] gives White a small advantage in space (García Pantoja-Gutiérrez Delgado, Provencial Ch, Havana, 2010).

12...0-0

Black has a small advantage in space thanks to a lead in development. Such advantages are usually transient.

13.0-0 Qc7

If [font color="red"]13...Qb6[/font] then:

[font color="red"]14.Qf3 Bc5 15.b4 Be7 16.a3 a5 17.c4[/font] is equal.
[font color="darkred"]14.Re1 Bb7 15.c4 Bc5 16.Qf3 Nb4 17.Be3[/font] is equal.

14.Be2!?

White allows Black to keep his Knight centralized.
Better is [font color="red"]14.c4 Nb4 15.Be2 c5 16.Be3 Bb7 17.Qb3 d5[/font] with equality.

14...d6 15.c4 Nb6 16.c5?!

This move forces Black's reply, but just because a move is the only move doen't mean it's a bad move.
If [font color="red"]16.Qd4 c5 17.Qc3 d5 18.cxd5 Nxd5 19.Qc2 Bb7[/font] continues to give Black a small advantage in space.

[center]BLACK: Teimour Radjabov[/center]

[center][/center]

[center]WHITE: Vugar Gashimov[/center][center]Position after 16.c4c5[/center]

16...dxc5!

Black's ugly pawn structure gives him possibilities on the queenside.

17.b3

White must prevent 18.c4!, when Black gets a strong position.
[font color="red"]17.Qc2[/font] also prevents the pawn advance, but after [font color="red"]17...Nd5! 18.Rd1 Qb6 19.Bd2 Rd8 20.Rac1 a5[/font] Black has a comfortable advantage.

17...a5

Black has but heavy restraints on White, giving him a substantially better game.
If [font color="red"]17...Rd8 18.Qc2 a5 19.Rb1 Qa7 20.a4 Ba6[/font] also gives White more freedom on the queenside

18.Bc4 a4 19.Be3 Nd5 20.Qe2

White continues to look for ways to make progress into Black's position, but Black's defense is rock solid.
[font color="red"]20.Qf3 Ba6 21.Nd3 Bxc4 22.bxc4 Nxe3 23.Qxe3 Rfd8[/font] gives Black the advantage in space and a tactical advantage; White does not have time to take the pawn, 24.Nxc5?, because of 24...Qb6! 25.Kh1 Qxc5, winning a piece.

20...Qb6!?

Black protects the foremost c-pawn, but could have grabbed command of the open diagonal.
If [font color="red"]20...Qa5! 21.Rac1[/font] then:

If [font color="red"]21...Rd8![/font] then:

[font color="red"]22.Bd2 Qa7 23.Rfd1 axb3 24.axb3 Ba6 25.g4 Qb7[/font] gives Black total control of the queenside.
[font color="magenta"]22.Rfd1 axb3 23.axb3 Ba6 24.g3 Rdb8 25.Bxa6 Qxa6[/font] gives Black total control of the queenside after the exchange of Queens.

[font color="darkred"]21...axb3 22.axb3 Ba6 23.Nd3 Bxc4 24.Rxc4 Qa2 25.Qxa2 Rxa2[/font] continues to gives Black a substanial advantage.

21.Bd2!?

White can't find the best move.
[font color="red"]21.Nd3! Ba6 22.Bf2 Bxc4 23.bxc4 Nc3 24.Qc2 Ne4[/font] still leaves Black with the advantage, but White's game is more defensible and Black has less freedom than before.

[center]BLACK: Teimour Radjabov[/center]

[center][/center]

[center]WHITE: Vugar Gashimov[/center][center]Position after 21.Be3d2[/center]

21...Ba6!

Black maintains a substantial advantage and assures that White must give up his good Bishop.

22.Nd3 Bb5 23.Kh1?!

White wants to counterattack on the kingside, but he doesn't have time.
A better plan is to fortify the queenside: [font color="red"]23.Rfc1 Ra7 24.Rab1 axb3 25.axb3 Ra2 26.Ra1 Rfa8.[/font]

23...Qa6! 24.Rac1 axb3

Black opens the a-file in preparation for an assault.
Also good is [font color="red"]24...Rfd8! 25.Rfd1 Nb6 26.Nb2 Rd5 27.Rf1 a3.[/font]

25.axb3 Bxc4 26.bxc4 Nb4 27.Be3 Rfd8 28.Ne1?!

White takes pressure off Black's foremost c-pawn and interrupts the commincation between his Rooks.
[font color="red"]28.Rc3 Qa5 29.h3 Rd7 30.Kg1 Na2 31.Rc2 Nc3.[/font]

[center]BLACK: Teimour Radjabov[/center]

[center][/center]

[center]WHITE: Vugar Gashimov[/center][center]Position after 28.Nd3e1[/center]

28...Qa2!

Black's domination of the board is such that he can progress his attack by exchanging Queens, depriving White of an effective defensive piece.
If [font color="red"]28...Qc8[/font] then:

If [font color="red"]29.Qf2 Ra5 30.Qg1 Na2[/font] then:

[font color="red"]31.Rc2 Qa6 32.h3 Rd1 33.Nf3 Rxf1 34.Qxf1 Nb4[/font] gives Black an extra pawn, domination of the queenside and the initiative.
[font color="burgundy"]31.Ra1 Qa6 32.Rf2 Ra4 33.Qf1 Nc3 34.Rxa4 Qxa4[/font] leaves White with no way to prevent Black from invading the back rank.

If [font color="darkred"]29.Rb1 Ra3[/font] then:

[font color="darkred"]30.Nf3 Qa6 31.Ng5 Bxg5 32.Bxc5 Bxf4 33.Rxf4 Ra2[/font] gives Black an extra pawn, domination of the queenside, command of the d-file and the initiative.
[font color="magenta"]30.Qf2 Ra5 31.Qe2 Qa6 32.Rb2 Ra3 33.Rf3 Qa4[/font] gives Black more freedom, including the threats to penetrate the back rank.

29.Qxa2 Rxa2 30.Rf2 Ra3 31.Re2

[font color="red"]31.Bd2 Kf7 32.g3 Rd4 33.Kg2 Re4 34.Rf3 Ra4[/font] puts Black on the brink of winning.

31...Kf7

Black will make certain that his most sensitive points are protected before launchinchi the final attack.

32.Kg1 h6 33.Kf1 g5 [33...g6] 34.g3 Rd7!?

Black hits a speed bump. The Rook is left unprotected.
A better idea is to benetrate White's position with the Rooks: [font color="red"]34...Rda8! 35.Bf2 Ra1[/font] then:

If [font color="red"]36.Be3 gxf4 37.Bxf4 Bg5 38.Rc3 R8a3[/font] then:

[font color="red"]39.Rxa3 Rxa3 40.Bd2 Bxd2 41.Rxd2 Ke7 42.Ng2 Nd3[/font] puts Black on the brink of winning.
If [font color="darkred"]39.Ree3? R3a2![/font] then:

If [font color="darkred"]40.Bxg5[/font] then after [font color="darkred"]40...hxg5 41.Re2 Ra3 42.Rxa3 Rxa3 43.Rd2 Ke7[/font] White is out of reserve pawn temi and must fall on his sword.
If [font color="magenta"]40.Re2[/font] then Black wins after [font color="magenta"]40...Bxf4 41.gxf4 Rxe2 42.Kxe2 Ra2+.[/font]

[font color="darkorchid"]36.Rc3 Rd8 37.Kg2 Rdd1[/font] gives Black a clearly superior game.

35.Rd2!

White takes advantage of Black's misplay.

35...Rda7 36.Bf2

[font color="red"]36.Bg1[/font] proves no better after [font color="red"]36...Rb3[/font] when:

[font color="red"]37.Bf2 Ra2 38.Rxa2 Nxa2 39.Rc2 Nb4 40.Rc1 g4[/font] leaves White with no reserve pawn tempi.
[font color="darkred"]37.Rcd1 Rc3 38.fxg5 hxg5 39.Rd7 Rxd7 40.Rxd7 Rxc4[/font] gives Black two extra pawns and more freedom.

36...Rb3 37.Kg2

If [font color="red"]37.Rdd1 Ke8 38.fxg5 hxg5[/font] then:

[font color="red"]39.h3 g4 40.hxg4 fxg4 41.Kg2 Raa3[/font] gives White no good options.
If [font color="darkred"]39.h4?[/font] drops a piece to [font color="darkred"]39...f4! 40.hxg5 fxg3[/font] when [font color="darkred"]41.Bg1[/font] doesn't save a piece after [font color="darkred"]Ra2! 42.Ng2 Rf3+!.[/font]
If [font color="magenta"]41.Rb1[/font] then after [font color="magenta"]41...Rxb1 42.Rxb1 gxf2[/font] Black wins.

37...Ke8 38.Kf1 Raa3 39.Rcd1?

The doubled Rooks are impotent.
White is still fighting for a draw after [font color="red"]39.Kg2 h5 40.Kh1 Ra8 41.Kg2 Ra4 42.Kf1 Raa3.[/font]

[center]BLACK: Teimour Radjabov[/center]

[center][/center]

[center]WHITE: Vugar Gashimov[/center][center]Position after 39.Rc1d1[/center]

39...gxf4!

This makes the third rank navigable for Black's Rooks.

40.gxf4 Rc3 41.Bxc5 Bxc5

Black is a piece to the good; White could have resigned here, but still has faint hopes of swindling Black with his Rooks.

42.Rd8+ Kf7 43.R1d7+ Kg6 44.Rg8+ Kh5 45.Rh7

[font color="red"]45.Rd2[/font] then Black wins after [font color="red"]45...Ra1 46.Rg3 Rxc4 47.Rdg2 Kh4 48.Rb2 Rxf4+.[/font]

[center]BLACK: Teimour Radjabov[/center]

[center][/center]

[center]WHITE: Vugar Gashimov[/center][center]Position after 45.Rd7h7[/center]

45...Rf3+!!

Black sacrifices the exchange to hasten the end.

46.Nxf3

If [font color="red"]46.Kg2[/font] then Black soon gives mate after [font color="red"]46...Rf2+ 47.Kg1 Rxf4+ 48.Kg2 Rf2+ 49.Kg1 Raa2.[/font]

46...Rxf3+ 47.Kg2 Rxf4 48.Rgh8 Rg4+ 49.Kh3

If [font color="red"]49.Kf3 Rg6[/font] then:

If [font color="red"]50.Rd7[/font] then Black wins after [font color="red"]Nc2 51.Rc8 Nd4+ 52.Kf2 Nb3+ 53.Ke2 Rg2+.[/font]
If [font color="darkred"]50.Rd8[/font] then Black wins after [font color="darkred"]50...Nc2 51.Rc8 Bg1 52.Ke2 Rg2+ 53.Kf1 Ne3+.[/font]

49...Nd3

Black will deliver mate as soon as White runs out of checks.

50.Rxh6+ Kg5 51.Rg8+ Kxh6 52.Rh8+ Kg5 53.Rh5+ Kf4 0-1

Grandmaster Gashimov resigns before he is mated.

Jack Rabbit

(45,984 posts)

16. Motylev - Tiviakov (Group B), Round 4

Reply to Jack Rabbit (Reply #2)

Mon Feb 27, 2012, 09:30 PM

Feb 2012

[center][/center]

[center]Alexander Motylev[/center]
[font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Stefan64 Stefan64 from http://en.wikipedia.org/wiki/File:Alexander_Motylev.jpg Wikimedia Commons (http://creativecommons.org/licenses/by-sa/3.0/deed.en Creative Commons License, Attribution/Share Alike)
[/font]

Alexander Motylev - Sergei Tiviakov
http://www.chessgames.com/perl/chessgame?gid=1653950
Tata Steel (Group B), Round 4
Wijk aan Zee, 17 January 2012

Scandanavian Game: Fafner Defense

1.e4 d5

Mh. Tiviakov, the former two-time Dutch national champion, is the foremost exponent of this opening today.

2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 g6

This is the Fafner Defense, named thus because Fafner was a Scandanavian Dragon.
More common are 5...a6 and 5...c6.

Tal-W. R. Chandler, XG, Knotty Ash, Lancashire, England, 1974.

6.Nb5

If [font color="red"]6.Bc4 Bg7[/font] then:

If [font color="red"]7.0-0 0-0 8.h3 a6 9.a4[/font] then:

If [font color="red"]9...Nc6 10.Be3 Bf5[/font] then:

[font color="red"]11.Re1 Rad8 12.Qe2 Nb4 13.Bb3 Be6 14.Nd2[/font] is equal (Zawadzka- A. Muzychuk, Euro ChW, Rijeka, 2010).
[font color="burgundy"]11.Qe2 Nb4 12.Bb3 Nbd5 13.Nxd5 Nxd5 14.Bg5[/font] is equal (Leko-Kramnik, Tal Mem Blitz, Moscow, 2009).

If [font color="darkred"]9...c5[/font] then:

[font color="darkred"]10.d5 Nbd7 11.Ba2 Qb8 12.Re1 Re8 13.d6[/font] gives White better development and more space (Efimenko-Kurajica, Euro Club Cup, Plovdiv, 2010).
[font color="magenta"]10.dxc5 Qxc5 11.Qe2 Nc6 12.Rd1 Bf5 13.Be3 Qb4[/font] is equal (Oral-Schleifer, Op, Quebec, 2001).

If [font color="darkred"]7.Ne5 0-0 8.0-0 a6 9.Re1[/font] then:

[font color="darkred"]9...b5 10.Bb3 Bb7 11.Bf4 Nh5 12.Bg5 Bf6 13.Bh6[/font] gives White a comfortable advantage in space (Damljanovic-Fernández García, Op, Bajada de la Virgén, Spain, 2005).
If [font color="magenta"]a) 9...c5 10.dxc5 Qxc5 11.Bb3 Nbd7[/font] then:

[font color="magenta"]12.Na4!? Qd6 13.Qxd6 exd6 14.Nxd7 Bxd7 15.Nb6[/font] gives White the initiative and more space (Erdogdu-Plenkovic, Euro Ch, Euro Ch, Budva, 2009).
[font color="darkorange"]12.Nd3! Qd6 13.Bf4 e5 14.Bg3 Nh5 15.Nxe5[/font] gives White an extra pawn and more space.

If [font color="magenta"]b) 9...Nc6![/font] then:

[font color="magenta"]10.Nxc6 bxc6 11.h3 Bf5 12.g4[/font] gives White a small avantage in space.
[font color="darkorange"]10.Bf4 Qxd4 11.Nxc6 Qxc4 12.Nxe7+ Kh8[/font] is equal.

6...Qd8

If [font color="red"]6...Qb6 7.c4 c6[/font] then:

If [font color="red"]8.Nc3 Bg7 9.Be2 0-0 10.0-0[/font] then:

If [font color="red"]10...Rd8[/font] then:

If [font color="red"]11.h3 Bf5[/font] then:

If [font color="red"]12.Qb3 Na6 13.Be3 Qxb3 14.axb3 Nb4 15.g4[/font] is equal (Anand-Kramnik, Tal Mem Blitz, Moscow, 2009).
If [font color="darkred"]12.Na4 Qc7 13.Be3[/font] then:

If [font color="darkred"]13...Nbd7!?[/font] then:

If [font color="darkred"]14.Rc1!? e5 15.d5[/font] then:

[font color="darkred"]15...Nf8?! 16.Nc3 Ne4 17.Nxe4 Bxe4 18.Qb3[/font] gives White a healthy advantage in space (Svidler-Kramnik, Tal Mem Blitz, Moscow, 2009).
[font color="purple"]15...cxd5! 16.cxd5 Qd6 17.Qb3 Nxd5 18.Rfd1 N7f6 19.Bc4[/font] is equal.

[font color="darkorange"]14.g4 Be6 15.Qc2 h6 16.Rac1 a6 17.Nc3[/font] gives White a small advantage in space.

[font color="magenta"]13...Na6 14.Qb3 Ne4 15.Nc3 e5 16.dxe5 Nac5[/font] is equal.

[font color="burgundy"]11.a3 Bf5 12.h3 Ne4 13.Be3 Nxc3 14.bxc3 c5[/font] is equal (Collins-Chatalbashev, Euro Club Cup, Rogaska Slatina, 2011).

If [font color="darkred"]10...Bg4 11.h3 Bxf3 12.Bxf3[/font] then:

If [font color="darkred"]12...Nbd7[/font] then:

If [font color="darkred"]13.Re1!? Rfe8 14.d5 Rad8[/font] then:

[font color="darkred"]15.Qb3!? cxd5 16.cxd5 a6 17.Bg5 Qxb3 18.axb3 h6[/font] draw (Motylev-Inarkiev, IT, Poikovsky, 2009).
[font color="purple"]15.Qe2 e5 16.Be3 Qa6 17.Qc2 Qxc4 18.b3[/font] gives White a small advantage in space.

[font color="darkorange"]13.a3 e5 14.d5 Qa6 15.Be2 cxd5 16.cxd5[/font] gives White a comfortable advantage in space.

[font color="magenta"]12...Rd8 13.d5 cxd5 14.cxd5 Na6 15.Qe2 Nb4 16.Rd1[/font] gives White the initiative against Black's e-pawn and a small advantage in space (Carlsen-Kramnik, Tal Mem Blitz, Moscow, 2009).

[font color="darkorchid"]8.c5!? Qd8 9.Nc3 Bg7 10.Qb3 0-0 11.Bc4 b5[/font] is equal.

7.c4

[font color="red"]7.Bf4 Na6 8.c4 c6 9.Nc3 Bg7 10.h3[/font] gives White a fair advantage in space (J. Polgar-Tomaczak, Euro Rpd Ch, Warsaw, 2011).

7...Bg7 8.h3 (N)

[font color="red"]8.Bf4 Na6 9.Be2 0-0 10.0-0 Ne4 11.Rc1 c6 12.Nc3[/font] gives White a small advantage in space (van Eijk-Tiviakov, Op, Hoogeveen, 2011).

8...0-0

The game is equal.

9.Be2 c5 10.d5

If [font color="red"]10.0-0 a6 11.Nc3[/font] then:

[font color="red"]11...cxd4! 12.Nxd4 Ne4 13.Nxe4 Qxd4 14.Qxd4 Bxd4 15.Nc3[/font] remains equal./li]
[font color="darkred"]11...Nbd7?! 12.Re1 Qc7 13.d5 Nb6 14.Bg5[/font] gives White more permanent space.

10...a6!?

Somewhat better is 10...Ne4, when White has fewer good moves after the subsequent 11...a6.
If [font color="red"]10...Ne4 11.0-0[/font] then:

If [font color="red"]11...a6[/font] then:

[font color="red"]12.Na3 Re8 13.Re1 Nd7 14.Qc2 Nd6 15.Bf4[/font] remains equal, but White's Knight is sidelined at a3.
[font color="burgundy"]12.Nc3 Nxc3 13.bxc3 Bxc3 14.Rb1 Nd7 15.Bf4 Qa5[/font] gives Black an extra pawn and White more space; this position has possibilities.

If [font color="darkred"]11...Nd7 12.Qc2[/font] then:

[font color="darkred"]12...a6 13.Nc7 Qxc7 14.Qxe4 Nf6 15.Qf4 Qb6 16.Rd1[/font] gives White a slight advantage in space.
[font color="magenta"]12...Nd6 13.Nxd6 exd6 14.Bf4 Qf6 15.Qd2 Qxb2 16.Qxb2 Bxb2[/font] gives White a slim advantage in space.

11.Nc3!

White has a small advantage in space and better development.

11...b5 12.0-0 Nbd7 13.cxb5!?

White prematurely releases pressure in the center.
If [font color="red"]13.Bf4[/font] then:

[font color="red"]13...Nh5 14.Bg5 h6 15.Be3 bxc4 16.Bxc4[/font] continues to gives White a small advantage in space; both sides have pawn weaknesses.
If [font color="darkred"]13...bxc4!?[/font] then:

If [font color="darkred"]14.d6! exd6 15.Qxd6[/font] then:

[font color="darkred"]15...Qb6 16.Bxc4 Bb7 17.Rab1 Bxf3 18.gxf3 Rfd8 19.Nd5[/font] remains equal.
[font color="darkorange"]15...Bb7 16.Rad1 Qb6 17.Rd2 Rac8 18.Bh2 Qxd6 19.Rxd6[/font] remains equal.

[font color="magenta"]14.Bxc4!? Nb6 15.Qe2 Bb7 16.Rfd1 Nfxd5 17.Nxd5 Nxd5[/font] remains equal.

13...Nb6!

Black has equalized.
If [font color="red"]13...axb5?! 14.Bxb5! Bb7[/font] then:

[font color="red"]15.Qb3 (15.Bg5!? Qc7 16.Re1[/font] then:

[font color="darkred"]16...Nb6 17.Bc6 Bxc6 18.dxc6 Qxc6 19.Ne5 Qb7 20.a4[/font] gives White a small advantage in space.
[font color="magenta"]16...h6?! 17.Bh4 Nb6 18.Bg3 Qc8 19.d6 exd6 20.Qxd6[/font] gives White a clear advantage in activity and space.

14.Ne5 Nfxd5 15.Nxd5!?

Obviously, White can not expect to maintain his Knights in the center.
[font color="red"]15.Nc6 Nxc3 16.bxc3 Qc7 17.Bg5 f6 18.Be3 axb5[/font] remains equal.

15...Bxe5!

Black takes a slim advantage in space.

16.Nxb6 Qxb6 17.Qd5 Qb8?!

Black takes aim at the Kingside, but better is to block the Queen's retreat.
If [font color="red"]17...Bd4![/font] then:

[font color="red"]18.Qc6 Rb8 19.a4 Qd8 20.Qf3 Bb7 21.Qg3 Ra8[/font] gives Black a small advantage in space.
[font color="darkred"]18.Qxa8 Bb7 19.Qxf8+ Kxf8 20.bxa6 Bxa6 21.Bxa6 Qxa6[/font] gives Black a small advantage in space.

[center]BLACK: Sergei Tiviakov[/center]

[center][/center]

[center]WHITE: Alexander Motylev[/center][center]Position after 17...Qb6b8[/center]

18.b6!

White has a passed pawn and a fair advantage in space.

18...Bb7 19.Qxc5 Rc8 20.Qa3

Also good is [font color="red"]20.Qb4 Rc2 21.Re1 Bh2+[/font] when:

[font color="red"]22.Kf1 Bd5 23.Be3 Qb7 24.f3 Be5 25.Reb1[/font] still gives White an extra pawn.
[font color="darkred"]22.Kh1?! Bd6 23.Qb3 Qc8! 24.Qd3 Bc5[/font] is equal.

20...Bd5 21.Rd1 e6 22.Be3 Rc2 23.Bf3 Bxb2?

Black perhaps feels the need to win pack his lost pawn, but this pawn is poisoned
If [font color="red"]23...Bxf3 24.gxf3 Rxb2 25.Rac1[/font] then:

[font color="red"]25...Rxb6 26.Bxb6 Qxb6 27.Rd7 Rf8 28.Qc5 Qb8 29.Kg2[/font] gives Black only one pawn for the exchange, while White's piece are flooding in Black's camp. Nevertheless, Black can fight on, but can't afford even the slightest misstep.
If [font color="darkred"]25...Bf6?[/font] then after [font color="darkred"]26.Rc7 Qf8 27.b7![/font] White wins.

24.Qa4!

All roads lead to victory.

24...Rc4

There is nothing anywhere near as good.
If [font color="red"]24...Rc3[/font] then White wins after [font color="red"]25.Bxd5 exd5 26.Rab1 Rxe3!! 27.fxe3 Qxb6 28.Qf4[/font]

[center]BLACK: Sergei Tiviakov[/center]

[center][/center]

[center]WHITE: Alexander Motylev[/center][center]Position after 24...R3c4[/center]

25.Qxc4!!

Baseball has the 6-4-3 double play, basketball has the jump shot with nothing but net and football has that little fake that throws the goalie off balance just before scoring the point. Chess has the Queen sacrifice.

25...Bxc4 26.Rab1 Be5

White probably saw this position when he played the Queen sacrifice.
If [font color="red"]26...Bd5 27.Bxd5 exd5 28.Rxb2[/font] then:

[font color="red"]28...d4 29.Bxd4 Qb7 30.Rc1 Re8 31.Rc7 Qb8 32.Rb1[/font] gives White a Rook on the seventh rank and an advanced passer, winning easily.
If [font color="darkred"]28...Qb7 29.Rc1[/font] then:

[font color="darkred"]29...Re8 30.Rc7 Qb8 31.Bf4[/font] White wins easily.
[font color="magenta"]29...Rd8 30.Rc7 Qb8 31.Bf4 g5 32.Bg3 Rf8 33.Bd6[/font] is crushing.

27.b7!

Black is toast.

27...Bd5

If [font color="red"]27...Ra7[/font] then White wins after [font color="red"]28.Rdc1 Rxb7 29.Rxb7 Qc8 30.Rb4.[/font]

28.Bxd5 exd5 29.Rxd5 Bc7

If [font color="red"]29...Bh2+[/font] then White wins after [font color="red"]30.Kh1 Bc7 31.Rd7 Be5 32.f4 Bg7 33.bxa8Q.[/font]

30.Rd7! Be5

[font color="red"]30...Ra7[/font] fails to stop the pawn; White wins after [font color="red"]31.Bxa7 Qxa7 32.Rxc7.[/font]

[center]BLACK: Sergei Tiviakov[/center]

[center][/center]

[center]WHITE: Alexander Motylev[/center][center]Position after 30...Bc7e5[/center]

31.bxa8Q!!

White sacrifices by queening, diverting Black's Queen from forming a battery with the Bishop.

31...Qxa8 32.Bh6!

White threatens to double Rooks on the seventh rank and prevents use of f8.
The text is much stronger than [font color="red"]32.Rbb7?! Qf8! 33.Bg5 Kg7 34.Kf1 Ba1 35.Ke2.[/font]

32...Qe8

There is no escape. White wins by setyting up a pin on the back rank.
If [font color="red"]32...Qc8 33.Rbd1 Bf6 34.R7d3[/font] then:

[font color="red"]34...g5[/font] then White wins after [font color="red"]35.h4 gxh4 36.Re3 Bg7 37.Rde1 Qf8 38.Bf4.[/font]
If [font color="darkred"]34...a5[/font] then [font color="darkred"]35.Re3 Bg7 36.Rde1[/font] wins easily.

33.Rbd1!

White sets up the back rank pin motif against the Black Queen.

33...Bf6 34.R7d6 Be7 35.Re1 a5 36.Rb6

Also good is [font color="red"]36.Bg5 h6 37.Rxe7 Qb8 38.Bf4 Kf8 39.Re1.[/font]

36...Qd8 37.Rxe7 1-0

Mh. Tivakov resigns.

1-0

Jack Rabbit

(45,984 posts)

17. Tikkanen - Grover (Group C), Round 11

Reply to Jack Rabbit (Reply #2)

Mon Feb 27, 2012, 09:31 PM

Feb 2012

Reigning Swedish national champion Hans Tikkanen finished second in Group C. Hans has been very impressive since winng the GM title in 2010.
[center]

[/center][center]Hans Tikkanen
[/center][font size="1"]font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Stefan64 Stefan64 from http://en.wikipedia.org/wiki/File:HansTikkanen11.jpg Wikimedia Commons (http://creativecommons.org/licenses/by-sa/3.0/deed.en Creative Commons License, Attribution/Share Alike) [/font]
[/font]

Hans Tikkanen - Sahaj Grover
http://www.chessgames.com/perl/chessgame?gid=1654843
Tata Steel (Group C), Round 11
Wijk aan Zee, 27 January 2012

Slav Queen's Gambit: Tikhi Opening

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4 5.h3 Bh5 6.Nc3 e6 7.Qb3

For alternatative lines in the Tikhi Opening, see Jakovenko-Vitiugov, Russian Ch, Moscow, 2009.
If [font color="red"]7.g4 Bg6 8.Ne5 Nbd7 9.Nxg6 hxg6[/font] then:

If [font color="red"]10.Bg2 dxc4 11.Qe2 Nb6 12.0-0 Be7 13.Rd1[/font] then:

If [font color="red"]13...g5 14.a4 a5 15.e4 Nfd7 16.Be3 e5 17.d5 Qb8 18.b3[/font] then:

[font color="red"]18...f6 19.bxc4 Bc5 20.Bxc5 Nxc5[/font] is equal (Hebden-L'Ami, EU Ch, Liverpool, 2008).
[font color="burgundy"]18...cxb3 19.Rab1 Nc5 20.Bxc5 Bxc5 21.Rxb3 Qd6[/font] is equal.

If [font color="darkred"]13...Nfd7[/font] then:

[font color="darkred"]14.e4 e5 15.dxe5 Qc7 16.e6 fxe6 17.g5[/font] gives Black an extra pawn (Stefanova-Predojevic, Op, Chalkida, 2009).
[font color="magenta"]14.Ne4 Rc8 15.a4 a5 16.Nd2 Bd6 17.Nxc4 Nxc4 18.Qxc4[/font] regains the pawn with equality.

If [font color="darkred"]10.Bd2 Bb4[/font] then:

[font color="darkred"]11.Rc1 Qc7 12.a3 Bxc3 13.Bxc3 Ne4 14.Bg2 Nxc3 15.Rxc3 Nb6[/font] is equal (Bareev-Najer, Op, Philadelphia, 2009).
[font color="magenta"]11.Qb3 a5 12.g5 Ne4 13.Nxe4 dxe4 14.Bxb4 axb4 15.h4[/font] gives White a small advantage in space (Vallejo Pons-Najer, Op, Baku, 2011).

7...Qb6 8.Ne5

If [font color="red"]8.Nh4[/font] then:

If [font color="red"]8...Be7 9.g4 Bg6 10.Nxg6 hxg6[/font] then:

If [font color="red"]11.Bg2 g5 12.Bd2[/font] then:

If [font color="red"]12...Nbd7 13.0-0-0[/font] then:

If [font color="red"]13...0-0-0 14.Qa4[/font] then:

[font color="red"]14...Kb8 15.c5 Qc7 16.b4 Rc8 17.Kb1 Nf8[/font] is equal (Miroshnichenko-Rapport, Euro Club Cup, Ohrid, Macedonia, 2009).
[font color="burgundy"]14...dxc4 15.Qxc4 Nf8 16.Qa4 Kb8 17.Ne4 Nxe4 18.Bxe4 Qb5 19.Qxb5[/font] draw (Houska=E. Pähtz, Euro ChTW, Porto Carras, Greece, 2011).

If [font color="darkred"]13...Qxb3 14.axb3 Nb6[/font] then:

[font color="darkred"]15.c5 Nbd7 16.f4 gxf4 17.exf4 b6 18.cxb6 axb6[/font] gives Black a slight edege in space (Kovalyov-T. Burg, ).
[font color="magenta"]15.e4 dxc4 16.bxc4 Nxc4 17.Bxg5 Nd5 18.Bxe7[/font] is equal (A. Rahman-J. P. Gomez, Asian Games TT, Guangzhou, 2010).

[font color="burgundy"]12...Na6 13.Qa4 Qb4 14.Qc2 Qd6 15.c5 Qc7 16.f4[/font] is equal (Eljanov-Smeets, Euro ChT, Novi Sad, 2009).

If [font color="darkred"]11.g5 Nfd7 12.f4 Na6 13.Bd2[/font] then:

[font color="darkred"]13...Qxb3 14.axb3 Nb4 15.Ke2 f6 16.h4 Kf7 17.Bg2[/font] is equal (Mozevich-Kramnik, Amber Rapid, Nice, 2009).
[font color="magenta"]13...dxc4 14.Bxc4 Nc7 15.Qc2 Nd5 16.a3 Rc8 17.0-0-0[/font] gives White slightly better pawns and a small advantage in space (Shulman-Akobian, Blitz Match, Upper Lake, California, 2009).

If [font color="darkred"]8...g5 9.Nf3 h6[/font] then:

If [font color="darkred"]10.Bd3 Rg8 11.Qc2[/font] then:

[font color="darkred"]11...dxc4 12.Bxc4 Nbd7 13.Bd2 Bb4 14.a3 Bg6[/font] is equal (Nyback-Tikkanen, IT, Porto Carras, 2011).
If [font color="magenta"]11...Nbd7 12.Bd2[/font] then:

[font color="magenta"]12...Bb4 13.a3 Bxc3 14.Bxc3 Qc7 15.Nd2[/font] gives White a slight advantage in space (N. Vitiugov-Ni Hua, Rpd TM, Ningbo, 2010).
[font color="darkorange"]12...Qc7 13.cxd5 exd5 14.g4 Bg6 15.Bf5[/font] gives White a slight advantage in space (Stefanova-Cramling, Grand Prix W, Istanbul, 2009).

If [font color="magenta"]10.Ne5 Nfd7[/font] then:

[font color="magenta"]11.Nd3 Bg6 12.Bd2 Na6 13.Rc1 Qxb3 14.axb3 Nb4[/font] is equal (Wang Yue-Atronian, Ol, Dresden, 2008).
[font color="darkorange"]11.Nxd7 Nxd7 12.Bd3 Rg8 13.cxd5 Qxb3 14.axb3 exd5 15.Bd2[/font] gives White a slight advantage in space (Barrett-Genutis, Euro Club Cup, Rogaska Slatina, 2011).

8...Nbd7

If [font color="red"]8...Nfd7 9.Nd3[/font] then:

If [font color="red"]9...Bg6 10.Qd1 h6 11.Nf4 Bh7 12.Nh5[/font] then:

[font color="red"]12...Nf6 13.Nxf6+ gxf6 14.Bd3 Bxd3 15.Qxd3 Qa6 16.b3[/font] is equal (Houska-Hovhannisyan, Euro Ch, Aix-les-Bains, 2011).
[font color="magenta"]12...Bg6 13.Be2 Bxh5 14.Bxh5 Nf6 15.Be2 Nbd7 16.0-0[/font]is equal (Efimenko-Shaw, Ol, Khanty-Mansiysk, 2010).

[font color="darkred"]9...Na6 10.Qxb6 axb6 11.Nf4 Bg6 12.Nxg6[/font] gives White a slight advantage after Black retakes the Knight, spoiling his kingside pawns (Parligras-Najer, Bundesliga 1011, Emsdetten, 2010).

9.g4

[font color="red"]9.Nd3 Bg6 10.Qxb6 axb6 11.Nf4 Bd6 12.Nxg6 hxg6[/font] is equal (Azmaiparashvili-Morozevich, FIDE Knock Out, Moscow, 2001).

9...Bg6 10.Nxg6 hxg6 11.Bg2 g5

If [font color="red"]11...Qc7 12.Bd2[/font] then:

If [font color="red"]12...Nb6 13.cxd5 exd5 14.0-0-0 0-0-0 15.Kb1[/font] then:

[font color="red"]15...Nc4 16.Bc1 Nd6 17.f3 Qb6 18.Qxb6 axb6 19.e4[/font] gives White stronger pawns and more space (Shaidullina-Shadrina, Russian ChW HL, Chelyabinsk, 2008).
[font color="magenta"]15...Kb8 16.Bc1 Bd6 17.g5 Nh5 18.e4 dxe4 19.Bxe4[/font] is equal (Serper-Akobian, Op, Bellevue, Washington, 2006).

[font color="darkred"]12...Bd6 13.Rc1 dxc4 14.Qxc4 Rc8 15.Qb3 Qb8 16.f4[/font] gives White a fair advantage in space (Zhukova-Galojan, Euro ChW, St. Petersburg, 2009).

12.c5 Qc7 13.e4 dxe4!? (N)

[font color="red"]13...Nh7?! 14.exd5 exd5 15.0-0 0-0-0 16.Qa4 f5 17.Qxa7[/font] gives White an extra pawn, stronger pawns and a significant advantage in space (Shimanov-Ponkratov, Russian ChT, Dagomys, 2010).
[font color="blue"]13...0-0-0 14.exd5 exd5 15.Qc2 Re8+ 16.Kf1[/font] is equal.

14.Bxg5!

White has a slight advantage in space.

14...e5 15.Bxf6 gxf6

[center]BLACK: Sahaj Grover[/center]

[center][/center]

[center]WHITE: Hans Tikkanen[/center][center]Position after 15...gf6:B[/center]

16.0-0-0!?

White has an opportuity to take a pawn, but sacrifices one instead.
[font color="red"]16.Nxe4 0-0-0 17.0-0-0 exd4 Rxd4[/font] continues to give White a slight advantage in space.

16...exd4 17.Rxd4

If [font color="red"]17.Nxe4 0-0-0 18.Rxd4[/font] then:

[font color="red"]18...Nxc5 19.Rxd8+ Qxd8 20.Qe3 Nxe4 21.Qxe4 Bh6+ 22.Kb1[/font] gives White a slight advantage in space.
[font color="darkred"]18...Bxc5? 19.Rxd7!! Qxd7 20.Nxc5 Qe7 21.Qc4[/font] gives White two minor pieces for a Rook and stronger pawns.

17...Nxc5

White has a slight advantage in space; Black has an extra pawn.

18.Qc4 Ne6 19.Rdd1

[font color="red"]19.Nxe4!? Nxd4 20.Nxf6+ Kd8 21.Qxd4+ Qd6 22.Qc3 Qf4+[/font] gives Black a small advantgage in space.

19...Qf4+ 20.Kb1 Qxf2?

This move look logical, but the Queen is about to be put in an awkward spot.
If [font color="red"]20...Bd6[/font] then [font color="red"]21.Ne2 Qe5 22.Bxe4 Qc5 23.Qc3 Qxc3 24.Nxc3[/font] gives Whitenothing more than a small advantgage in space.

[center]BLACK: Sahaj Grover[/center]

[center][/center]

[center]WHITE: Hans Tikkanen[/center][center]Position after 20...Qf4f2:p[/center]
21.Nxe4!!

White proffers the Bishop.
[font color="red"]21.Bxe4?! Qc5! 22.Qb3 Qb4 23.Qc2 Rd8 24.Bf5[/font] gives White only a small advantage in space.

21...Qxg2

Black takes the Bishop, but now how is the Queen going to extricate itself from g2?

22.Rhg1!

This is the only productive continuation at White's disposal.
If [font color="red"]22.Rde1?[/font] then Black wins after [font color="red"]22...0-0-0! 23.Qf1 Qxf1 24.Rexf1 Bg7.[/font]

22...Qh2 23.Nxf6+ Ke7

[center]BLACK: Sahaj Grover[/center]

[center][/center]

[center]WHITE: Hans Tikkanen[/center][center]Position after 23...Ke8e7[/center]

24.Rd7+!!

White sacrifices a second piece to bring the King into the open.

24...Kxf6 25.Rf1+ Kg5

If [font color="red"]25...Kg6[/font] then White gives mate soon after [font color="red"]26.Qe4+ Kg5 27.Rf5+ Kh6 28.g5+ Kh5 29.g6+.[/font]

26.Rf5+!

Black is toast.

26...Kh6 27.Rdxf7 Ng7

The Black King is on a grim forced march.
If [font color="red"]27...Qh1+ 28.Rf1[/font] then:

If [font color="red"]28...Ng5 29.h4 Qe4+[/font] then:

[font color="red"]30.Ka1 Nxf7 31.Qxf7 Be7 32.g5+[/font] White wins easily.
[font color="magenta"]30.Qxe4 Nxe4 31.R1f5[/font] is crushing.

If [font color="darkred"]28...Bg7[/font] then White wins after [font color="darkred"]29.Qxe6+ Kh7 30.Qf5+.[/font]

28.g5+ Kh7 29.g6+ Kxg6 30.R7f6+ 1-0

White soon gives mate.
Sri Grover resigns.

Jack Rabbit

(45,984 posts)

18. Ernst - Bruzón Batista (Group B), Round 13

Reply to Jack Rabbit (Reply #2)

Tue Feb 28, 2012, 04:35 PM

Feb 2012

Cuban grandmaster Lázaro Bruzón won this last-round game to tie for second in Group B.

[center][/center]

[center]Lázaro Bruzón Batista[/center]
[font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Stefan64 Stefan64 from http://de.wikipedia.org/w/index.php?title=Datei:LazaroBruzon12.jpg Wikimedia Commons (http://creativecommons.org/licenses/by-sa/3.0/deed.en Creative Commons License, Attribution/Share Alike)
[/font]

Sipke Ernst - Lázaro Bruzón Batista
http://www.chessgames.com/perl/chessgame?gid=1655135
Tata Steel (Group B), Round 13
Wijk aan Zee, 29 January 2012

Symmetrical English Game: Catalan Opening

1.Nf3 c5 2.c4 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.g3

For a survey of the Symmetrical English, see Vacier Lagrave-Salgado López, Aeroflot Op, Moscow, 2011.

5...e5 6.Nb5 Bb4+

[font color="red"]6...d6 7.Bg2 Be7 8.Bg5 0-0 9.0-0 Be6 10.Nd2[/font] is equal (Ni Hua-Yu Lie, China League, Jinan, 2005).

7.Bd2

If [font color="red"]7.N1c3 d6[/font] then:

[font color="red"]8.Bg2 a6 9.Na3 Bxc3+ 10.bxc3 0-0 11.0-0 h6[/font] is equal (Kramnik-Grischuk, Candidates' M, Kazan, 2011).
[font color="darkred"]8.a3 Bxc3+ 9.Nxc3 Be6 10.e4 Rc8 11.f3 a6[/font] is equal (Knott-Edouard, Op 1011, Hastings, 2010).

7...a6 8.Bxb4?! (N)

If [font color="red"]8.N5c3 d5 9.cxd5 Nxd5 10.Bg2[/font] then:

If [font color="red"]10...Be6!? 11.0-0[/font] (the game is equal) [font color="red"]11...Nb6[/font] then:

[font color="red"]12.Ne4!? Be7 13.Be3 Nc4 14.Bc1 Qxd1 15.Rxd1 Nd4[/font] gives Black a strong game (Shchekachev-Edouard, French Ch, Caen, 2011).
[font color="magenta"]12.Na4 Be7 13.Nxb6 Qxb6 14.Nc3 Rd8[/font] gives Black the advantage in space (Lalith-Istratescu, Op 1112, Hastings, 2011).
[font color="darkorange"]12.Bxc6+ bxc6 13.Qc2 Be7 14.Rd1 0-0[/font] remains equal.

[font color="darkred"]10...Nb6 11.Bxc6+ bxc6 12.Qc2 Bh3 13.Na4 Bxd2+[/font] gives Black a slight advantage in space.

[center]BLACK: Lázaro Bruzón Batista[/center]

[center][/center]

[center]WHITE: Sipke Ernst[/center][center]Position after 8.Bd2c4:B[/center]

8...axb5!

Black has the advantage in space, but his Bishop isn't developed and is in danger of being entombed.
[font color="red"]8...Nxb4?! 9.Nd6+! Kf8 10.a3 Nc6 11.e3 Ne8 12.Nc3[/font] gives Black some very serious problems completing development while White occupies d6.

9.Bd6 Qa5+ 10.Nc3?!

With White's b-pawn as yet unprotected and Black prepared to advance his own pawn to b4, the Knight would be better deployed to d2.
[font color="red"]10.Nd2 Ne4 11.c5 Nxd6 12.cxd6 Qb4[/font] continues to give Black a small advantage with a threat against an unprotected pawn.
[font color="blue"]10.Qd2?![/font] then:

[font color="blue"]10...Ne4 11.Qxa5 Nxa5 12.Bxe5 Nb3![/font] gives Black a fine game.
If [font color="darkblue"]10...Nd4?![/font] then White gets the better game after [font color="darkblue"]11.Qxa5 Rxa5 12.Bc7! Ra8 13.Na3.[/font]

10...b4!

Of course! Black has a clear advantage.

11.Nb5 b3+ 12.Nc3

If [font color="red"]12.Qd2[/font] then Black wins a pawn after [font color="red"]12...Qxd2+ 13.Kxd2 Ne4+! 14.Ke3 Nxd6 15.Nxd6+ Ke7.[/font]

12...Ne4 13.Qd3

[center]BLACK: Lázaro Bruzón Batista[/center]

[center][/center]

[center]WHITE: Sipke Ernst[/center][center]Position after 13.Qd1d3[/center]

13...Nxc3?!

Black's long term problem is the blockade at d6.
Better is [font color="red"]13...Nxd6! 14.Qxd6 Nb4![/font] (threatening ...Nc2+) [font color="red"]15.c5 Kd8 16.Bg2 Ra6[/font] gives Black good winning prospects with a strong queenside initiative.

14.bxc3!

This is the only way to recapture. Black's power in the a-file combined with the advanced b-pawn give him the advantage, but White's problems are manageable. Black still needs to free the Bishop.
If [font color="red"]14.Qxc3?! Qxc3+ 15.bxc3 Rxa2 16.Rb1 Na5 17.c5 Nc4[/font] gives Black a powerful attack on the queenside.

14...Nd4

Black has only a slight advantage, concentrated on the queenside. White is compensted with his blockade at d6.
If [font color="red"]14...Qxa2!?[/font] then:

If [font color="red"]15.Rd1! h5 16.Bg2 h4 17.c5[/font] then:

[font color="red"]17...Qc2 18.Qxc2 bxc2 19.Rc1[/font] gives White a small advantage.
If [font color="magenta"]17...b2?![/font] then Black's prize pawn drops after [font color="red"]18.Bd5! Qa5 19.Rb1.[/font]

If [font color="darkred"]15.Rxa2?[/font] then after [font color="darkred"]15...bxa2[/font] the pawn must queen.

15.Bg2 Nc2+ 16.Kd2

This is White only move that drop a piece.

16...Nxa1 17.Rxa1 Ra6!?

Black gives White an opportunity to equalize.
If [font color="red"]17...bxa2 18.c5 Qa3 19.Qc2 Ra6 20.Bd5 Rxd6 21.cxd6[/font] gives Black a slight edge at best; White wins the exchange and Black's passer.
[font color="blue"]17...Qxa2+!? 18.Rxa2 bxa2 19.Qe3 f6 20.Bxe5 fxe5 21.Qxe5+[/font] is equal.

18.c5??

After fighting his way back into the game, White blunders it away.
[font color="red"]18.a3! f6 19.Rb1 Qa4[/font] is equal.

[center]BLACK: Lázaro Bruzón Batista[/center]

[center][/center]

[center]WHITE: Sipke Ernst[/center][center]Position after 18.c4c5[/center]

18...Qxa2+!!

Exquisite. Black sacrifices the Queen and wins quickly. There is no way Black can ptrvent the pawn from queening.

19.Rxa2 bxa2 20.Qe4

White "threatens" mate. It's all he can do.

20...f6!

Black brushes it off.

21.Bxe5 fxe5 22.Qxe5+

If [font color="red"]22.Bf3[/font] then Black wins after [font color="red"]22...0-0! 23.Qxe5 a1Q.[/font]

22...Re6 23.Qxg7 Rf8 24.Bf3 Ref6

Black queens on the next move.
Mh. Ernst resigns.

Jack Rabbit

(45,984 posts)

10. 54th Torneo di Capadanno, Reggio Emilia, Italy

Reply to Jack Rabbit (Reply #1)

Mon Feb 27, 2012, 03:55 PM

Feb 2012

[center][/center]
[font size="1"]The Wheel of Fortune (Rider-Waite Tarot deck) from Wikipedia http://en.wikipedia.org/wiki/File:RWS_Tarot_10_Wheel_of_Fortune.jpg (Public Domain)
[/font]

Jack Rabbit

(45,984 posts)

13. Nakamura - Giri, Round 9

Reply to Jack Rabbit (Reply #10)

Mon Feb 27, 2012, 04:01 PM

Feb 2012

Anish Giri, the 17-year-old Dutch National Champion, began badly in Reggio Emilia, but took first when the leaders finished as badly as he started.

[center][/center]

[center]Anish Giri[/center]
[font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Stefan64 Stefan64 from http://commons.wikimedia.org/wiki/Category:Anish_Giri Wikimedia Commons (http://creativecommons.org/licenses/by-sa/3.0/deed.en Creative Commons License, Attribution/Share Alike)
[/font]

Hikaru Nakamura - Anish Giri
http://www.chessgames.com/perl/chessgame?gid=1653091
54th Torneo di Capadanno, Round 9
Reggio Emilia, 5 January 2012

Epine Dorsal: Horseman Defense (Janisch Opening/Monte Carlo Variation) (Petroff Defense)

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center]
[center]Epine Dorsal: Horseman Defense (Janisch Opening/Monte Carlo Variation)[/center][center]Position after [/center]

This is the Monte Carlo Variation of the Janisch Opening. It was first played in London, 1851 by Anderssen against Löwenthal, but was seldom seen over the next half century. It made a steady appearance at a series of international tournaments held in Monte Carlo in the early twentieth century. The debut is also called the Nimzovich Attack, but JR Opening Catalog doesn't like to use the same name for multiple ideas and we will leave the name Nimzovich with ideas of playing Black's King's Bishop to b4 and pinning White's Knight at c3.
Properly speaking, the Janisch is the variation covering 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4, while what we call the Janisch (1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4) is called the Classical Petroff. However, we don't like to overuse the word Classical, either.

5...Nxc3 6.dxc3 Be7 7.Be3

For moves and alternate lines up to here, see Motylev-Gashimov, IT, Poikovsky, 2009.

7...Nd7

If [font color="red"]7...Nc6 8.Qd2[/font] then:

If [font color="red"]8...0-0 9.0-0-0 Ne5[/font] then:

If [font color="red"]10.h4 Bg4 11.Be2 Qc8[/font] then:

If [font color="red"]12.h5 Re8 13.Kb1[/font] then:

[font color="red"]13...h6 14.Rde1 a6 15.Nxe5 dxe5 16.f3 Be6 17.Bd3 Bf5 18.g4 Bxd3 19.Qxd3 Qe6 20.Bc1 Bf6 21.Re4 Rad8 22.Qe2 Qd7[/font] is equal (Jakovenko-Wang Hao, TM, Nizhniy Novgorod, 2007).
[font color="burgundy"]13...a6 14.Rde1 Bf8 15.Rh4 Be7 16.Rhh1 Bf8 17.Rh4[/font] draw (Inarkiev-Motylev, Russian Ch HL, 2005).

[font color="darkpink"]12.b3 Re8 13.Kb1 Bf8 14.h5 a6 15.Rde1 b5 16.Bf4 Nd7[/font] is equal (Topalov-Kramnik, IT, Sofia, 2005).

If [font color="darkred"]10.Kb1 Be6 11.Nd4 Nc4 12.Qd3[/font] then:

If [font color="darkred"]12...Nxe3!? 13.Nxe6! fxe6 14.Qxe3 e5 15.Bd3 c6 16.h4[/font] gives White a fair advantage in space (Arakhamia-Levushkina, Euro ChW, Dresden, 2007).
[font color="magenta"]12...Bd5 13.Bc1 Bf6 14.Qh3 Qc8 15.Qg3 Ne5[/font] is equal (Kobalia-Frolyanov, Euro Ch, Warsaw, 2005).

If [font color="darkorchid"]8...Be6 9.0-0-0 Qd7 10.Kb1 a6 11.h3 h6 12.g4 0-0-0 13.Bg2 g5 14.Nd4 Nxd4 15.Qxd4 c5 16.Qd2 Bf6 17.f4 gxf4 18.Bxf4 Qa4 19.b3 Qa5 20.c4 Qxd2 21.Rxd2 Bg5 22.Rf1 Bxf4 23.Rxf4[/font] gives White a comfortable advantage in space (Bologan-Belov, Russian ChT, Sochi, 2007).

8.Qd2 0-0 9.0-0-0 c6

Black chooses a conservative, positional approach
For those who prefer storm and stress in the center, there is [font color="red"]9...Ne5 10.Nd4!?[/font] when:

If [font color="red"]10...c5! 11.Nb5 Be6 12.Nxd6 Qb6[/font] then:

If [font color="red"]13.b4 Bxd6 14.Qxd6 Qxd6 15.Rxd6 cxb4 16.cxb4[/font] then:

If [font color="red"]16...Bxa2 17.Bd4[/font] then:

[font color="red"]17...Rfe8 18.Bxe5 Rxe5 19.Bd3 Rd5 20.Rxd5 Bxd5 21.f3[/font] is equal (Rohl Montes-Perea, Capablanca Mem, Havana, 2004).
[font color="burgundy"]17...f6 18.Bxe5 fxe5 19.Kb2 Bf7 20.Bd3 a5 21.bxa5 Rxa5[/font] is equal (Su. Polgar-Dr. Nunn, IT, Brussels, 1985).

[font color="darkpink"]16...a5?! 17.bxa5 Rxa5 18.Bd4! Bxa2 19.Rb6 Rc8 20.Bb5[/font] gives White more space, the initiative and he will soon have an extra pawn.

If [font color="darkred"]13.f4 Ng4[/font] then:

If [font color="darkred"]14.f5?! Bxa2 15.Bf4 Rfd8 16.b3 Nf6[/font] then:

[font color="darkred"]17.Kb2? Bxd6 18.Qxd6 Rxd6 19.Rxd6 Qc7[/font] gives Black a material advantage (Tukhaev-Belikov, IT, Alushta, 2005).
If [font color="magenta"]17.Bc4 Bxd6 18.Bxd6 Ne4 19.Bxf7+[/font] then:

[font color="magenta"]19...Kh8! 20.Qd3 Nxd6[/font] gives Black an extra piece.
If [font color="darkorange"]19...Kxf7?? 20.Qd5+![/font] then:

If [font color="darkorange"]20...Kf6[/font] then [font color="darkorange"]21.Qe5+ Kg5 22.Qxg7+[/font] then:

If [font color="darkorange"]22...Kh4 23.Qh6+ Kg4 24.h3+ Kxf5 25.g4#.[/font]
[font color="purple"]22...Kxf5 23.g4+ Ke6 24.Qe7#.[/font]

If [font color="hotpink"]20...Ke8[/font] then [font color="hotpink"]21.Qe6#.[/font]

[font color="darkorchid"]14.Nc4 Qa6 15.Na3 c4 16.f5 Bxf5 17.Bxc4 Qg6[/font] gives Black a fair advantage in space.

If [font color="darkred"]10...a6 11.f4 Ng4 12.Bd3[/font] then:

If [font color="darkred"]12...Nxe3 13.Qxe3 Bf6 14.Qf3[/font] then:

If [font color="darkred"]14...c5 15.Nb3[/font] then:

[font color="darkred"]15...a5 16.Bc4 a4 17.Nd2 a3 18.b3 d5 19.Bxd5 Bxc3 20.Nc4[/font] gives White a fair advantage with more active pieces in or near the center and a little more space (Dolmatov-Anikaev, Soviet Ch, Moscow, 1979).
[font color="purple"]15...Be6 16.Be4 Qb6 17.g4 a5 18.g5 Be7 19.Bd5[/font] gives White greater activity and space (van der Wiel-Piket, IT, Amsterdam, 1989).

[font color="darkorange"]14...Bd7 15.g4 Bxd4 16.cxd4 Bc6 17.Qh3 g6 18.Rhf1[/font] gives White a slight advantage in space (Baumegger-Rabiega, Austrian ChT, Mörbisch, 2001).

[font color="magenta"]12...c5 13.Nf5 c4 14.Be4 Bxf5 15.Bxf5 Nxe3 16.Qxe3[/font] gives White a significant adavantage in space, but Black has stronger pawns (van der Wiel-Jussupow, IT, Sarajevo, 1984).

10.h4 Re8

If [font color="red"]10...Ne5[/font] then:

If [font color="red"]11.Kb1 Bg4 12.Be2 Nxf3[/font] then:

If [font color="red"]13.gxf3 Bh5[/font] then:

[font color="red"]14.f4!? Bxe2 15.Qxe2 Bf6 16.Rhg1 Re8 17.f5[/font] gives White a small advantage in space (Karjakin-Gelfand, Tal Mem, Moscow, 2010).
[font color="burgundy"]14.Qd4 Re8 15.Rhg1 g6 16.Qf4 Bf8 17.Rg5 Bh6[/font] is equal.

If [font color="darkred"]13.Bxf3[/font] then:

[font color="darkred"]13...Bxf3!? 14.gxf3 Qa5 15.h5 Qf5 16.Rdg1 f6 17.Rg4[/font] gives White a fair advantage in space (Jakovenko-Gelfand, Grand Prix, Astrakhan, 2010).
[font color="magenta"]13...Be6 14.Bg5 d5 15.Bxe7 Qxe7 16.Qg5 Qxg5 17.hxg5[/font] is equal.

If [font color="darkred"]11.c4 Be6 12.Ng5 Bf5[/font] then:

[font color="darkred"]13.Kb1 Re8 14.f3 h6 15.Be2 d5 16.g4[/font] gives White a fair advantage in space (Karjakin-Kramnik, Tal Mem, Moscow, 2010).
[font color="magenta"]13.f3 f6 14.Nh3 Be6 15.b3 a6 16.Nf4 Bf7[/font] is equal (Karjakin-Gelfand, Amber Blind, Monte Carlo, 2011).

11.Bd3

[font color="red"]11.Kb1 Qa5 12.h5 h6 13.Bd3 Bf8 14.g4 Nf6[/font] is equal (Ivanchuk-Gelfand, Amber Rapid, Nice, 2010).

11...d5!? (N)

The text move gives White a small advantage in space.
[font color="red"]11...Nf6 12.Rde1 d5 13.Bd4 c5 14.Bxf6 Bxf6 15.Qf4[/font] is equal (Nakamura-Kramnik, Tal Mem, Moscow, 2010).

12.Ng5!?

[font color="red"]12.Rhe1! Nc5 13.Bxc5 Bxc5 14.Rxe8+ Qxe8 15.Re1[/font] gives White a slight advantage in space.

12...Nf8!?

White's previous move gives Black a slight advantage in space.
If [font color="red"]12...h6! 13.Nf3 Nc5[/font] then:

[font color="red"]14.Kb1 14...Bg4 15.c4 Nxd3 16.Qxd3 Be6 17.c5 Bf6[/font] gives Black a small advantage in space.
[font color="darkred"]14.Bxc5?! Bxc5 15.Rhe1 Rxe1 16.Rxe1 Bg4! 17.Nd4 Qxh4[/font] gives Black an extra pawn.

13.h5!

This is one of several ways to level the game.
If [font color="red"]13.Rde1 h6 14.Nf3 Be6[/font] then:

[font color="red"]15.h5 c5 16.Kb1 Qa5 17.Bf4 Rad8 18.g3 d4[/font] is equal.
If [font color="darkred"]15.Reg1?! c5 16.g4[/font] then:

[font color="darkred"]16...d4 17.cxd4 Qd5 18.g5 hxg5 19.Nxg5 Qxa2[/font] gives Black an extra pawn, a strong initiative and more space.
If [font color="magenta"]16...Qd7?! 17.a3[/font] then:

[font color="magenta"]17...b6 18.h5 d4 19.cxd4 Bd5 20.Ne5[/font] gives White an extra pawn and a substantial advantage in space.
[font color="darkorange"]17...Bxg4??[/font] drops a pieces [font color="darkorange"]18.Ne5! Qc7 19.Nxg4.[/font]

If [font color="blue"]13.Qe2! Bc5 14.Qh5[/font] then:

[font color="blue"]14...g6 15.Qf3 Bxe3+ 16.fxe3 Qe7 17.Rdf1 f5 18.Re1[/font] is equal
[font color="darkblue"]14...Bxe3+ 15.fxe3 g6[/font] then:

If [font color="darkblue"]16.Qh6 Qe7 17.e4 f6 18.Nf3 dxe4 19.Bxe4[/font] is equal.
[font color="dodgerblue"]16.Qf3 Qe7 17.Rdf1 f5 18.Re1 Nd7 19.Qg3 Qe5[/font] is equal.

[center]BLACK: Anish Giri[/center]

[center][/center]

[center]WHITE: Hikaru Nakamura[/center][center]Position after 13.h4h5[/center]

13...Bf6

The game is equal.

14.Nf3 Bg4

If [font color="red"]14...h6 15.Nh2 Qa5[/font] then:

If [font color="red"]16.a3 c5 17.Rhe1 Bd7[/font] then:

[font color="red"]18.f4 Re7 19.Bf2 Rae8 20.g3 c4 21.Bf1 d4[/font] remains equal.
[font color="magenta"]18.Be2 Rad8 19.Ng4 Bxg4 20.Bxg4 Ne6 21.Kb1 Qb5[/font] remains equal.

[font color="darkred"]16.Kb1 Be6 17.a3 Nd7 18.f4 Nc5[/font] remains equal.

15.Rde1 Bxf3

If [font color="red"]15...h6 16.a3 Nd7 17.Reg1 Qe7[/font] then:

If [font color="red"]18.Bxh6 gxh6 19.Qxh6[/font] then:

[font color="red"]19...Ne5 Qxc5 21.Qf4 Rxe1+ 22.Rxe1 Bxh5[/font] gives Black an extra pawn and the initiative.
[font color="burgundy"]19...Bg7!? 20.Qf4 f5 21.h6 Bf6 22.Kb1 Kh8 23.Re1[/font] gives White a small advantage in space.

If [font color="darkred"]18.Re1!? Qf8 19.Kb1 Nc5[/font] then:

[font color="darkred"]20.Bxc5 20.Bh7+ Kh8 21.Bd3+ Kg8 22.Bh7+ etc.[/font] draws.
[font color="magenta"]20.Bd4 Qd6 21.Bxc5 Qxc5 22.Rxe8+ Rxe8 23.Qf4 Bd7[/font] gives Black a small advantage with command of the e-file and slioghtly stronger pawns; White has command of the h2/b8 and b1/h7 diagonals, although he may have some problems coordinating one.

16.gxf3 Ne6

If [font color="red"]16...Qa5[/font] then:

If [font color="red"]17.a3 Ne6 18.h6[/font] then:

[font color="red"]18...g6 19.f4 d4 20.cxd4 Qxd2+ 21.Bxd2 Bxd4 22.f5[/font] remains equal.
If [font color="darkred"]18...g5?![/font] then:

[font color="darkred"]19.Reg1! d4 20.cxd4 Qxd2+ 21.Bxd2 Bxd4 22.Bxg5 Nxg5 23.Rxg5+[/font] gives White an extra pawn and a fiece attack..
[font color="magenta"]19.Rhg1 d4 20.cxd4 Qxd2+ 21.Bxd2 Nxd4 22.Be4 Kh8 23.Be3[/font] gives White the better center, the initiative and more space; Black has better pawns, but White derives activity from the opening the g-file that resulted in his pawn weakness.

[font color="darkorchid"]17.Kb1 d4 18.Bxd4 Bxd4 19.b4 Rxe1+ 20.Rxe1 Qxh5[/font] remains equal.

17.f4!?

White attempts a pawn storm with weak pawns.
[font color="red"]17.Kb1 Ng5 18.Qd1 h6 19.f4 Ne4[/font] remains equal.

17...h6!

Black has a small advantage in space.

18.a3

If [font color="red"]18.Qd1 Qa5 19.Kb1[/font] then:

If [font color="red"]19...Nc5 20.Bxc5 Qxc5[/font] then:

[font color="red"]21.Re2 Kf8 22.Rhe1 Rxe2 23.Qxe2 b5 24.Qe3 Qe7[/font] gives Black a slight advantage owing to the half-pin in the e-file.
[font color="magenta"]21.Qd2 b5 22.a3 Kf8 23.Re3 d4 24.cxd4 Bxd4[/font] gives Black a fair advantage in space thanks to the more active Queen.

[font color="darkred"]19...c5 20.f5 Ng5 21.Bxg5 Bxg5 22.Be2 Rad8 23.Bf3[/font] gives Black a small advantage in sapce.

18...Qa5 19.Qd1 Nc5?!

Black invites a trade of minor pieces and blocks the advance of his queenside pawns.
If [font color="red"]19...c5![/font] (occupying with a pawn a square that is alredy overprotected) [font color="red"]20.f5 Ng5 21.f4 Ne4 22.Bxe4 dxe4[/font] blocks any further advance of White on the kingside and gives Black the edge in space.

20.Bf5?!

The Bishop serves no purpose here.
If [font color="red"]20.Rhg1! Rad8 21.Bf5 Qc7 22.Qg4[/font] then:

[font color="red"]22...Qa5 23.Qd1 Ne4 24.Bd4 Qa4 25.Bxe4 Bxd4[/font] is equal.
[font color="darkred"]22...Qb6 23.b4 Qa6 24.bxc5 Qxa3+ 25.Kd1 Bxc3[/font] gives White a small advantage in space.

[center]BLACK: Anish Giri[/center]

[center][/center]

[center]WHITE: Hikaru Nakamura[/center][center]Position after 20.Bd3f5[/center]

20...Na4!

Hit 'em where they ain't. --Ted Williams
That's baseball, but it applies in chess as well. Black strikes at the queenside where White has no defenders and gains more freedom.
If [font color="red"]20...Ne4?! 21.Bxe4! Rxe4 22.f3 Ra4 23.Bd4[/font] then:

[font color="red"]23...Bxd4 24.cxd4 c5 25.Re7 Rxd4 26.Qe2 Rxf4[/font] is equal.
[font color="darkred"]23...Qd8 24.Qd2 b5 25.Be5 Qe7 26.Kb1[/font] is equal.

21.Qd3 Nc5?!

Black could have sacrificed on c3 here, but instead chases the Queen.
If [font color="red"]21...Nxc3! 22.Bd2 d4 23.Bh7+ Kh8[/font] then:

[font color="red"]24.Be4 Qc5 25.Bf3[/font] gives Black a trementous position.
The theme of the sacrifice at c3 comes up often in the next dozen or so moves.
If [font color="darkred"]24.bxc3?[/font] then [font color="darkred"]24...dxc3 25.Be3 Rad8![/font] leaves White no time to save the Queen on account of [font color="darkred"]26.Qe2 Qxa3+ 27.Kb1 Qb2#.[/font]

22.Qd1 Qb5!?

Why doesn't Black just play 22...Na4 and try to get it right the second time?

23.Qe2!

White dodges a bullet.

23...Qa4

Accepting the invitation to exchange Queens is no better.
If [font color="red"]23...Qxe2 24.Rxe2 Ne4 25.Rhe1 Nd6 26.Bg4 Re4[/font] gives Black only a small advantage in space.

24.Qd1!?

White should leaves his Queen in contact with the weak pawn at c3.
If [font color="red"]24.Qd2! Ne4 25.Bxe4 dxe4 26.Qe2 Rad8 27.Rd1[/font] is equal.

24...Ne4!?

Black again contemplates the possibility of sacrificing at c3.
If [font color="red"]24...Rad8![/font] then:

[font color="red"]25.Bd4 Ne4 26.Rhg1 Kf8 27.f3 Bxd4 28.cxd4 Nd6[/font] gives Black stronger pawns and active pieces.
[font color="darkred"]25.Bxc5?! Qxf4+! 26.Kb1 Qxf5 27.Rxe8+ Rxe8 28.Bxa7 Re4[/font] gives Black more freedom; White has the advantage in space, but cannot bring more force to the kingside fast enough. Speed, as it other sports, is an important element of chess.

25.Bxe4?!

White allows Black a free hand in the center.
If [font color="red"]25.Qd3[/font] (again, the c3 pawn needs to be overprotected) then:

[font color="red"]25...Rad8 26.Bxe4 dxe4 27.Qe2 Qa5 28.Rhg1 Rd5 29.Rd1 Red8[/font] gives Black a small advantage in space.
[font color="darkred"]25...Nd6!? 26.Rhg1 Nxf5 27.Qxf5 Re6 28.Rd1 Qc4[/font] gives Black a small advantage in space.

25...Rxe4!

Black takes a fair advantage in space.

26.Rhg1 Rae8 27.Rg3?!

White prepares to double the Rooks at the g-file, hoping for some counterplay.
[font color="red"]27.Kb1 b6 28.Qd3 Qc4 29.Rd1 Qxd3 30.cxd3 R4e7[/font] continues to give Black a fair advantage.

[center]BLACK: Anish Giri[/center]

[center][/center]

[center]WHITE: Hikaru Nakamura[/center][center]Position after 27.Rg1g3[/center]

27...Kh8!

This is an excellent example of a prophylactic move. Black continues to put pressure on the c-pawn and has power in the e-file.

28.Reg1 Qc4 29.Kb1 c5 30.Qd3!?

It's too late for this now.
If [font color="red"]30.Qf3! Qb5 31.Qg2[/font] then:

[font color="red"]31...Rg8 32.Bc1 Qd7 33.Rd3 Qf5 34.f3 Re7[/font] continues to give Black a fair advantage in space.
White is threatening [font color="darkred"]32.Rxg7 Bg5 33.Rxg5 hxg5 34.Qxg5[/font] with to follow soon.

30...b6!

Black reinforces his kingside before taking specific measures.

31.Qxc4?!

Even the exchange of Queens provides no relief.
[font color="red"]31.Rd1 Qxd3 32.cxd3 R4e7 33.d4 c4 34.Rdg1 Re4[/font] continues to give Black a fair advantage in space.

[
31...Rxc4!

Black again threatens to sacrifice on c3, which would be devastating even without Queens on the board.

32.Rd1?!

The threat is idle. Taking on d4 would only make Whit vulnerable on the back rank.
If [font color="red"]32.Bd2 Rce4 33.Rd3 Rd8 34.Kc1 Kh7[/font] gives BLack a better center, command of the e-file and stronger pawns.

32...d4!

White's Bishop goes reeling back.

33.cxd4 cxd4 34.b3?

White has been teetering since his 30th move, but now the game slips beyond hope.
Better is [font color="red"]34.Bd2 Re2 35.Rf3 Rc5 36.f5 Kh7 37.c3 Rc4[/font] when Black has a pair of active Rooks., but it will take more work to break through White's defense.

[center]BLACK: Anish Giri[/center]

[center][/center]

[center]WHITE: Hikaru Nakamura[/center][center]Position after 34.b2b3[/center]

34...dxe3!!

This is the right way to sacrifice the exchange.
[font color="red"]34...Rxe3?[/font] is the wrong way to sacrifice the exchange; White wins after [font color="red"]35.fxe3! Rc3 36.Rd3 Rxd3 37.cxd3 dxe3 38.Rxe3[/font] when Black has no compensation.

35.bxc4 exf2 36.Rf3 Re1

If [font color="red"]36...Bh4[/font] then:

If [font color="red"]37.c3 Re2 38.Kc1 Kg8 39.a4 g5[/font] then:

If [font color="red"]40.fxg5[/font] then after [font color="red"]40...hxg5 41.Rd8+ Kg7 42.Rd7 Kh6 43.Rfxf7 Kxh5[/font] Black wins easily.
If [font color="magenta"]40.hxg6[/font] then Black wins after [font color="magenta"]40...fxg6 41.Rh3 Re1 42.Rh1 Kg7.[/font]

If [font color="darkred"]37.Rh3[/font] then Black wins after [font color="darkred"]37...g5 38.Rdh1 g4!! 39.Rxh4 Re1+.[/font]

37.Kc1 Bd4 38.c3 Be3+

Also good is [font color="red"]38...Bc5 39.Kd2 Be3+ 40.Kc2 f5 41.Rxe3 Rxe3[/font] when 42...Re1 assures the queening of the pawn.

39.Kc2 f5 40.a4 a5 41.c5 Bxc5 0-1

[font color="red"]42.Kd2 Be3+[/font] then:

[font color="red"]43.Kc2 43...Kh7 44.Rd3 Bc5[/font] leaves Black up a piece.
If [font color="darkred"]43.Rxe3[/font] then Black wins after [font color="darkred"]43...Rxd1+ 44.Kxd1 f1Q+.[/font]

Mr. Nakamura resigns.

Jack Rabbit

(45,984 posts)

19. Vitiugov - Nakamura, Round 1

Reply to Jack Rabbit (Reply #10)

Tue Feb 28, 2012, 09:08 PM

Feb 2012

American GM Hikaru Nakamura started off hot in Reggio Emilia and was leading after seven rounds with daylight between him and the rest. Then he lost his last thee game and finished with Alexander Morozevich.

[center][/center]

[center]Hikaru Nakamura[/center]
[font size="1"]Photo by James F. Perry in Wikipedia http://en.wikipedia.org/wiki/Hikaru_Nakamura (Creative Commons License, http://creativecommons.org/licenses/by-sa/3.0/deed.en , Attribution/Share Alike)
[/font]

Nikita Vitiugov - Hikaru Nakamura
http://www.chessgames.com/perl/chessgame?gid=1652205
54th Torneo di Capadanno, Round 1
Reggio Emilia, 27 December 2011

Orthodox Queen's Gambit: London Opening

1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bf4 0-0 6.e3

If [font color="red"]6.a3 c5 7.dxc5 Bxc5[/font] then:

If [font color="red"]8.e3 Nc6 9.Qc2[/font] then:

If [font color="red"]9...Qa5[/font] then:

If [font color="red"]10.0-0-0 Be7[/font] then:

If [font color="red"]11.g4 dxc4 12.Bxc4 e5 13.g5 exf4 14.gxf6 Bxf6 15.Nd5 Ne7 16.Nxf6+ gxf6 17.Rhg1+ Kh8[/font] then:

If [font color="red"]18.Qe4 Ng6 19.Qd4 Qb6 20.Qxb6 axb6 21.Rd6[/font] then:

[font color="red"]21...fxe3 22.fxe3 Ra5 23.Kd2 Rf5 24.Rf1 Rc5 25.Bd3 Rc6 26.Rxc6 bxc6[/font] is equal (Kasparov-Khalifman, IT, Reggio Emilia, 1991).
If [font color="darkred"]21...Bh3 22.Kb1 Bf5+[/font] then:

[font color="darkred"]23.Ka1 Be4 24.Nd4 Ne5 25.Bb5 fxe3 26.fxe3 Rg8[/font] is equal (Gelfand-Jussupow, IT, Linares, 1993).
[font color="magenta"]23.Ka2 Be4 24.Nd4 Ne5 25.Bb3 fxe3 26.fxe3 Rg8[/font] is equal (Akopian-Kruppa, Op, St. Petersburg, 1993).

If [font color="darkred"]18.e4 b5 19.Bd5 Nxd5 20.exd5[/font] then:

If [font color="darkred"]20...b4 21.axb4 Qa1+ 22.Kd2 Qa6[/font] then:

If [font color="darkred"]23.Qc6 Rd8 24.Kc3 Bb7 25.Qxa6 Bxa6 26.Rd4 Rac8+ 27.Kd2 Bb7 28.Rc1 Rxc1 29.Kxc1 Kg7[/font] then:

[font color="darkred"]30.Nh4 Rxd5 31.Rxd5 Bxd5 32.Nf5+ Kf8[/font] is equal (Anand-Kramnik, Rpd, León, 2002).
[font color="purple"]30.Ne1 Rxd5 31.Rxd5 Bxd5 32.Nd3 f3 33.Kd2 Bc6[/font] is equal (van Wely-Short IT A, Wijk aan Zee, 1997).

[font color="darkorange"]23.Nd4 Rd8 24.b5 Qb6 25.Qe4 Bb7 26.Qxf4 Rxd5[/font] is equal (Akopian-Short, IT, Groningen, 1996).

[font color="magenta"]20...Bd7 21.Kb1 b4 22.Rd4 Rg8 23.Rxg8+ Rxg8 24.Qd2[/font] is equal (Kramnik-Karpov, IT, Monte Carlo, 1998).

If [font color="darkred"]11.h4 a6 12.Ng5[/font] then:

If [font color="darkred"]12...Rd8 13.cxd5 exd5[/font] then:

[font color="darkred"]14.e4! Nxe4 15.Ngxe4 dxe4 16.Rxd8+ Qxd8 17.Qxe4 g6[/font] is equal (Gelfand-Karpov, IT, Wijk aan Zee, 1998).
[font color="burgundy"]14.Kb1?! h6! 15.Nf3 Bg4 16.Be2 Rac8 17.Nd2 Bxe2 18.Nxe2 d4[/font] gives Black more freedom and more space (van Wely-Sharif, ZT, Linares, 1995).

If [font color="magenta"]12...dxc4 13.Bxc4[/font] then:

If [font color="magenta"]13...h6 14.Kb1[/font] then:

[font color="magenta"]14...Ne5 b5!? 15.Bb3 Ng6 16.Nge4 Nxf4 17.exf4 Qc7[/font] draw (M. Gerevich-Barsov, Op, Brugge, 1995).
[font color="purple"]15.Nce4! Nxe4 16.Qxe4 Bxg5 17.Bd3 f5 18.Qxc6[/font] gives White a strong initiative against the Black King position (Mamedyarov-Zatonskih, Op, Gibraltar, 2012).

[font color="darkorange"]13...Qc5?! 14.Nce4! Nxe4 15.Nxe4 Qa5 16.Ng5[/font] forces Black to weaken his King position (Kotanjian-Hammes, Euro Club Cup, Kallithea, Greece, 2008).

If [font color="darkred"]10.Rd1 Be7[/font] then:

If [font color="darkred"]11.Be2 dxc4 12.Bxc4 Nh5[/font] then:

If [font color="darkred"]13.0-0 Nxf4 14.exf4[/font] then:

[font color="darkred"]14...g6 15.g3 Rd8 16.Rxd8+ Qxd8 17.Rd1[/font] gives White a fair advantage in space (Kramnik-Carlsen, IT, Dortmund, 2009.).
[font color="burgundy"]14...Rd8 15.Rxd8+ Qxd8 16.Rd1 Bd7 17.f5 Qc8 18.Qd3 Be8 19.fxe6 fxe6 20.Nd5[/font] gives White the advantage in space (A. Gupta-Kjartansson, Op, Reykjavik, 2009).
[font color="darkpink"]13.Bd6 Bxd6 14.Rxd6 Nf6 15.Qd2 Rd8 16.Rxd8+ Qxd8 17.Qxd8+ Nxd8 18.Ke2[/font] gives White the advantage in space (Eljanov-Chadaev, Russian ChT, Sochi, 2009).
If [font color="magenta"]11.Nd2 e5 12.Bg5 d4 13.Nb3[/font] then:

If [font color="magenta"]13...Qd8 14.Be2 a5 15.Na4[/font] then:

[font color="magenta"]15...g6 16.Bxf6 Bxf6 17.0-0 Qc7 18.c5 Be6 19.e4 Ne7 20.Nd2 Bg5[/font] is equal (Ftacnik-Kotronias, Ol, Thessaloniki, 1988).
If [font color="darkorange"]15...Ng4 16.Bxe7 Qxe7 17.exd4 Qh4[/font] then after [font color="darkorange"]18.Bxg4 Bxg4 19.Rd2 exd4 20.0-0 Rad8 21.Nac5 d3 22.Qc3 Be2 23.Re1 a4 24.Nxa4 Rfe8[/font] gives Black more than enough extra space to comensate for his pawn minus (Jussupow-Korchnoi, IT, Tilburg, 1987).
[font color="purple"]18.g3 Qh3 19.Bf1 Qh5 20.Bg2 exd4 21.Nxd4 Re8+ 22.Kf1 Nxh2+ 23.Rxh2 Qxh2 24.Nxc6 Bh3[/font] White resigns as mate cannot be avoided (Puth-Döttling, Op, Bad Wörishofen, 2001).

If [font color="darkorange"]13...Qb6 14.Bxf6 Bxf6 15.Nd5 Qd8 16.Bd3[/font] then:

If [font color="darkorange"]16...g6 17.exd4[/font] then:

If [font color="darkorange"]17...Nxd4 18.Nxd4 exd4 19.Nxf6+ Qxf6 20.0-0[/font] then:

If [font color="darkorange"]20...Bg4 21.f3[/font] then:

If [font color="darkorange"]21...Be6[/font] then after [font color="darkorange"]22.f4 Bd7 23.Be4 Bc6 24.Bd5 Rfe8 25.Qd3 Bxd5 26.cxd5 Rac8 27.g3[/font] White will soon be a pawn to the good (Cu. Hansen-Jussupow, Op, Reykjavik, 1985).
[font color="burgundy"]21...Bd7 22.Rf2 Rfe8 23.Rfd2 Rad8 24.Be4 Bc6 25.Bxc6 bxc6[/font] gives Black a passed pawn and a small advantage in space (Tukmakov-Balashov, TT, Kislovodsk, 1982).

[font color="darkpink"]20...Bd7 21.b4 Rac8 22.Qb2 Rfd8 23.Rd2[/font] draw (Korchnoi-Schussler, IT, Haninge, Sweden, 1988).

If [font color="purple"]17...exd4 18.Nxf6+ Qxf6 19.0-0[/font] then:

If [font color="purple"]19...Rd8 20.Be4[/font] then:

[font color="purple"]20...Ne7 21.Rd2 Bf5 22.Rfd1 Qe5 23.f3 Rac8 24.Rxd4 Rxd4 25.Rxd4[/font] gives White a small advantage in space (Koneru-Grigoryan, Asian Ch, Hyderabad, India, 2005).
[font color="hotpink"]20...Bg4 21.f3 Be6 22.Nc5 Rac8 23.Nxb7[/font] gives White an extra pawn and the initiative; Black has a little more space (Savon-Geller, IT, Tiraspol, 1994).

[font color="darkpink"]19...Bg4 20.Rd2 Rac8 21.Be4 Rfd8 22.h3 Be6 23.Rfd1[/font] is equal (Nill-Melia, Euro Ch, Dresden, 2007).

[font color="hotpink"]16...h6 17.exd4 Nxd4 18.Nxd4 exd4 19.0-0 Be6 20.Bh7+ Kh8 21.Be4 Bxd5 22.Bxd5[/font] draw (Miles-D. Gurevich, IT, San Francisco, 1987).

If [font color="darkred"]9...dxc4?! 10.Bxc4[/font] then:

If [font color="darkred"]10...Qe7 11.Bg5 h6 12.Bh4[/font] then:

If [font color="darkred"]12...Bb6 13.Ne4 Ba5+ 14.b4[/font] then:

[font color="darkred"]14...g5 15.Nfxg5 Nxe4 16.Nxe4 Bxb4+ 17.axb4 Qxh4 18.b5[/font] gives White more activity for his pieces, stronger pawns and more space (Zhao Xue-Thao Nguyen Pham Le, Mindsports Rpd, Beijing, 2008).
[font color="burgundy"]14...Bc7 15.Nxf6+ gxf6 16.0-0 Rd8 17.Qe4 Rd7 18.Rad1[/font] gives White stronger pawns and more space.

If [font color="magenta"]12...a6 13.Ba2 Rd8 14.Ne4 g5 15.Nxc5 gxh4[/font] then:

If [font color="magenta"]16.Rc1 b6 17.Na4 Bb7 18.Nxb6[/font] gives White an extra pawn, stronger pawns and more space (Suba-Mirkovic, IT, Belgrade, 1984).
[font color="burgundy"]16.0-0 h3 17.Rfd1 b6 18.Na4 Rxd1+ 19.Rxd1[/font] gives White stronger pawns and more space.

[font color="darkorange"]10...a6 11.0-0 Bd7 12.Ba2 Rc8 13.Rad1[/font] gives White a comfortable advantage in space (Kosteniuk-Zatonskih, Mind Games RpdW, Beijing, 2011).
[font color="purple"]10...Bd7 11.Rd1 Rc8 12.Bd3 h6 13.h3 Qe7 14.0-0[/font] gives White the advantage in space (Rolland-Teichmann, SX, London, 1896).

[font color="darkorchid"]8.cxd5 Nxd5 9.Nxd5 exd5 10.Rc1 Bb6 11.e3 Nc6 12.Bd3 Bg4 13.h3 Bh5 14.0-0[/font] is equal (T. L. Petrosian-Rodgaard, Ol, Dresden 2008).

6...Nbd7 7.Be2

If [font color="red"]7.Qc2! c6 8.h3[/font] then:

If [font color="red"]8...Re8 9.a3[/font] then:

If [font color="red"]9...Nf8 10.Bd3[/font] then:

If [font color="red"]10...dxc4 11.Bxc4 Nd5 12.Bg3[/font] then:

[font color="red"]12...Nxc3 13.Qxc3 Bd6 14.0-0 Bxg3 15.fxg3 Bd7 16.g4[/font] gives White a subtantial advantage in space (Beliavsky-Speelman, IT, Linares, 1991).
[font color="burgundy"]12...Bd6 13.Bxd6 Qxd6 14.Ne4 Qd8 15.0-0 Ng6 16.Rad1[/font] gives White a comfortable advantage in space (Savon-Gerbich, Op, Vladivostok, 1995).

[font color="darkpink"]10...h6 11.0-0 Bd6 12.Bxd6 Qxd6 13.Rad1 b6 14.e4[/font] gives White a better center; he can break the game open to his advantage (Kramnik-Barati, SX, Lyon, 2001).

If [font color="darkred"]9...dxc4 10.Bxc4[/font] then:

[font color="darkred"]10...a6 11.0-0 c5 12.dxc5 Bxc5 13.Rfd1 b5 14.Bd3[/font] gives White a healthy advantage in space with pieces eyeing Black's kingside (Charnushevich-Neiman, IT, Besançon, 2001).
[font color="magenta"]10...b5 11.Ba2 Bb7 12.Rd1 Nd5 13.Bb1 g6[/font] is equal (P. Balogh-Kotan, Op, Presov, Slovakia, 2001).

If [font color="darkred"]8...dxc4 9.Bxc4[/font] then:

If [font color="darkred"]9...Nb6 10.Bb3 Nbd5[/font] then:

[font color="darkred"]11.Bh2 Nxc3 12.bxc3 c5 13.0-0 Bd7 14.Ne5[/font]gives White a fair advantage in space (ivkov-Jimenez Zerquera, IT, Palma de Mallorca, 1967).
[font color="darkorange"]11.0-0 Nxf4 12.exf4 Nd5 13.Ne2 Qd6 14.Ne5 Bd7[/font] is equal (Bagatirov-Makkas, Op, Patros, Greece, 2001).

[font color="magenta"]9...Nd5 10.Bh2 N7f6 11.0-0 Qa5 12.e4 Nxc3 13.bxc3[/font] gives White an active Bishop par, a center duo and more space (Tarasova-Bukhteeva, Russian ChT, Dagomys, 2010).

7...c5

If [font color="red"]7...dxc4 8.Bxc4[/font] then:

If [font color="red"]8...c5 9.0-0 cxd4[/font] then:

If [font color="red"]10.exd4 Nb6[/font] then:

If [font color="red"]11.Bb3 Nbd5 12.Bg5[/font] then:

[font color="red"]12...b6 13.Bxf6 Nxf6 14.d5 exd5 15.Nxd5 Bc5 16.Qd3[/font] is equal (Radjabov-Wang Yue, IT, Nanjing, 2009).
[font color="burgundy"]12...Nxc3 13.bxc3 b6 14.Re1 Bb7 15.Qd3 Rc8 16.Ne5[/font] gives Black stronger pawns and White more space (Grachev-Azarov, Euro Club Cup, Plovdiv, 2010).

If [font color="darkred"]11.Bd3 Nbd5[/font] then:

[font color="darkred"]12.Be5 Bd7 13.Rc1 Bc6 14.Re1 Bd6 15.Bb1 Bxe5 16.Nxe5[/font] gives White a small advantage in space, but he must defend an isolated d-pawn (Sasikiran-Kasiomdzhanov, Ol, Torino, 2006).
[font color="magenta"]12.Bg3 b6 13.Ne5 Bb7 14.Rc1 Rc8 15.Qe2 Nb4[/font] is equal (Janowski-Jaffe, Match, New York, 1916).

If [font color="darkred"]10.Qxd4 Nb6[/font] then:

If [font color="darkred"]11.Be2 Qxd4 12.Nxd4 Nfd5 13.Nxd5 Nxd5[/font] then:

[font color="darkred"]14.Be5 Bd7 15.Bf3 Rfd8 16.Rac1 Rac8 17.h3[/font] is equal (Lautier-Vescovi, IT, Poikovsky, 2003).
[font color="darkorange"]14.Bg3 Bd7 15.Rfd1 Rfd8 16.e4 Nb4 17.a3 Nc6[/font] is equal (Yermolinsky-Lenderman, US Ch, St. Louis, 2010).

[font color="magenta"]11.Bb3 Qxd4 12.Nxd4 Bd7 13.Ndb5 Ne4 14.Nxe4 Bxb5[/font] is equal (Likavsky-Slobodjan, Bundesliga 0708, Germany, 2007).

If [font color="darkred"]8...a6 9.a4 c5 10.0-0 cxd4[/font] then:

If [font color="darkred"]11.Qxd4 Nb6 12.Bb3 Qxd4 13.Nxd4 Bd7[/font] then:

If [font color="darkred"]14.a5 Nbd5 15.Nxd5 Nxd5[/font] then:

[font color="darkred"]16.Bxd5 exd5 17.Bc7 Bf6 18.Bb6 Rac8 19.Rfc1[/font] is equal (Dr. Hübner-Jussupow, IT, Wolvega, Holland, 2006).
[font color="burgundy"]16.Be5 Rac8 17.Rfd1 Rfd8 18.Nf5 exf5 19.Bxd5 Bc6[/font] is equal (Kempinski-Senff, Bundesliga 0304, Germany, 2004).

[font color="darkpink"]14.Rfd1 Rac8 15.Nf3 Rfd8 16.Bd6 Kf8 17.a5 Nc4[/font] is equal (Le Quang Liem-Laznicka, Op, Kolkata, 2009).

If [font color="magenta"]11.exd4 Nb6[/font] then:

If [font color="magenta"]12.Bb3 Bd7[/font] then:

If [font color="magenta"]13.Ne5 Bc6 14.Re1 Nbd5 15.Bg5[/font] then:

If [font color="magenta"]15...Qd6!?[/font] then:

[font color="magenta"]16.Qd3!? Nb4 17.Qh3 Bd5 18.Nxd5 Nfxd5 19.Bd2[/font] is equal (Tregubov-Al Timimi, Op, Gibraltar, 2005).
[font color="burgundy"]16.Rc1 h6 17.Bd2 Rac8 18.Qe2 Nb4 19.Rcd1[/font] gives White a slight advantage in space.

[font color="darkpink"]15...h6 16.Bd2 Rc8 17.Rc1 Qb6 18.Bxd5 Nxd5 19.Nxd5 Bxd5[/font] is equal.

[font color="purple"]13.a5 Nbd5 14.Nxd5 Nxd5 15.Bxd5 exd5 16.Qb3 Bb5[/font] is equal (Potkin-Manuyan, Russian ChT, Oglinka, 2011).

[font color="darkorange"]12.Be2 Nbd5 13.Bg3 Bd7 14.Ne5 a5 15.Nxd7 Qxd7[/font] is equal (Zvjanginsev-Rustemov, Russian ChT, Sochi, 2004).

8.cxd5

[font color="red"]8.dxc5 Nxc5 9.cxd5 Nxd5 10.Nxd5 Qxd5 11.Qxd5 exd5 12.0-0[/font] gives White stronger pawns and a slight advantage in space (Del Río Angelis-Malakhatko, Euro ChT, León, 2001).

8...Nxd5 9.Nxd5 exd5 10.0-0 c4 (N)

[font color="red"]10...a6[/font] then:

[font color="red"]11.dxc5 Nxc5 12.Nd4 Bf6 13.Bf3 Ne6 14.Nxe6 Bxe6[/font] is equal (Tregubov-Karpov, Rpd IT, Cap d'Agde, 2000).
[font color="darkred"]11.Qc2 c4 12.a4 Bb4 13.Bg5 Qb6[/font] is equal (Beliavsky-Hracek, Yugoslav ChT, Herceg Novi, 2001).

11.b3

White has a fair advantage in space.

11...Nb6 12.bxc4!?

White unnecessarily concedes space to Black without hope of compensation.
If [font color="red"]12.a4 a5 13.Qc2[/font] then:

If [font color="red"]13...Be6 14.bxc4[/font] then:

[font color="red"]14...dxc4 15.Rfb1 f5 16.Rb5 Rc8 17.Bg3 c3 18.Ne5[/font] gives White more activity, a better center and a slight edge in space; each side has a passed pawn, but Black's is of more concern at the moment.
[font color="burgundy"]14...Nxc4 15.Ne5 Rc8 16.Nxc4 f5 17.Rfd1 Kh8 18.Rab1[/font] gives White a huge advantage in space; Black's bad Bishop is very, very bad, while White's is active outside the pawn chain.

If [font color="darkred"]13...g5 14.Bg3[/font] then:

[font color="darkred"]14...f5 15.bxc4 f4 16.c5 Nd7 17.Qb3 fxg3 18.Qxd5+[/font] gives White a clearly better ga,e.
If [font color="magenta"]14...Be6 15.bxc4 Nxc4 16.Ne5[/font] then:

If [font color="magenta"]16...Nxe5[/font] then:

[font color="magenta"]17.dxe5 Rc8 18.Qb2 Bb4 19.Rad1 Qe7 20.Bd3 Bg4[/font] is equal.
[font color="purple"]17.Bxe5 Rc8 18.Qb3 Bb4 19.Rfc1 f6 20.Bg3[/font] gives White stronger pawns and Black a slight advantage in space.

[font color="darkorange"]16...Rc8 17.Nxc4 f5 18.Rfd1 Qd7 19.Be5 Bf6 20.Bxf6[/font] assures White of an extra pawn.

[center]BLACK: Hikaru Nakamura[/center]

[center][/center]

[center]WHITE: Nikita Vitiugov[/center][center]Position after 12.bc4:p[/center]

12...dxc4

White has a small advantage in space; each side has a passed pawn.
Black's passer is weak; he would do better to recapture with the Knight.[font color="red"]12...Nxc4! 13.Rb1 b6 14.Bd3 Bg4[/font] is equal.

13.Qc2!

This is clearly the best way to exploit Black's inaccuracy.
If [font color="red"]13.a4!?[/font] then Black has time to put the c-pawn in safety with [font color="red"]13...c3! 14.e4 f5 15.Qb3+ Kh8 16.e5 Nd5[/font] and equality.

13...Be6 14.Rab1

White still has a slight advantage.
[font color="red"]14.Bg3!? f5! 15.a4 a5 16.h4 Rc8 17.Ne5 c3[/font] is equal.

14...Rc8

[font color="red"]14...Qc8!? 15.Bg3! f6 16.Rfd1 Bd7 17.Rdc1 Kh8 18.Qc3[/font] gives White a small advantage in space.

15.a4 a5 16.Ng5 Bxg5 17.Bxg5 f6 18.Bh4

White continues to maintain a slight advantage in space.
If [font color="red"]18.Bf4 Nd5[/font] then:

[font color="red"]19.Rxb7 Nxf4 20.exf4 Qxd4 21.g3 Rb8 22.Rb5 Rxb5[/font] is equal.
[font color="darkred"]19.Bg3?! c3! 20.Bd3 f5 21.Qe2 Nb4 22.Rfc1 Bd5[/font] gives Black greater activity.

18...c3 19.Bd3 h6 20.Bb5?!

White should maintain pressure on the b1/h7 diagonal.
If [font color="red"]20.Bh7+ Kh8 21.Rfc1 Re8 22.Bf5 Bxf5 23.Qxf5 Qd5[/font] continues to give White a slim advantage in space..

[center]BLACK: Hikaru Nakamura[/center]

[center][/center]

[center]WHITE: Nikita Vitiugov[/center][center]Position after 20.Bd3b5[/center]

20...Nd5!

This move completely turns the game around in Black's favor. Black's advanced passer is over protected abd White's dark bound Bishop, which would be quite in the defense against the pawn, is on the wrong side of the board.

21.Qe4

No better is [font color="red"]21.Rfc1 Nb4 22.Qe4 Ba2 23.Ra1 Qd5 24.f3 c2[/font] when Black has the center and a passed pawn knocking at the enemy's palace gate.

21...Qd6

If [font color="red"]21...Qe7[/font] then:

[font color="red"]22.Rfc1 Nb4 23.f3 Qf7 24.Be1 Ba2 25.Ra1 f5[/font] gives Black the advantage in pushing the c-pawn; he has domination of the queenside and White has only faint chance of launching a counter attack on the queenside.
If [font color="darkred"]22.Bd3? g5! 23.Qg6+ Qg7[/font] then:

If [font color="darkred"]24.Bg3[/font] then after [font color="darkred"]24...Qxg6 25.Bxg6 c2 26.Rbc1 f5 27.h4 Nb4[/font] Black wins by applying pressure to the queening square.
If [font color="magenta"]24.Qxg7+[/font] then Black wins after [font color="magenta"]24...Kxg7 25.Rxb7+ Rf7! 26.Rxf7+ Kxf7 27.Bg3 Nb4.[/font]

22.Bg3 Qe7 23.Rbc1?!

White plays the wrong Rook. After the text move, it isn't possible for White to have two Rooks on open files.
If [font color="red"]23.Rfc1 Nb4 24.f3 Rfd8 25.Be1[/font] then:

If [font color="red"]25...f5 26.Qh4 Qxh4 27.Bxh4 g5 28.Bf2 f4[/font] magnifies the power of Black's passer.
If [font color="darkred"]25...c2?! 26.Rb2 f5 27.Qh4 Qxh4 28.Bxh4 g5[/font] is equal

23...Nb4!

The Knight swings into action, exploiting the weakness of White's last move.

24.d5

If [font color="red"]24.Be2?! c2![/font] then:

[font color="red"]25.d5 Nxd5 26.Rxc2[/font] then:

[font color="red"]26...Nc3! 27.Qd3 Rfd8 28.Rxc3 Rxd3 29.Rxd3 Rd8[/font] gives Black a Queen against White's Rook and Bishop; White may be able to get something out of his Bishop pair.
If [font color="magenta"]26...Rxc2?! 27.Qxc2 Rc8 28.Qd3 Nc3 29.Bf3 b6[/font] gives Black the remote pawn majority; White has the Bishop pair and a slight advantage in space.

If [font color="darkred"]25.h3?[/font] then Black wins after [font color="darkred"]25...Rfe8! 26.Bh5 Bf7 27.Qxe7 Rxe7 28.Bd6 Ree8.[/font]

24...Nxd5 25.Rfd1 Rfd8!?

More effective is driving the Queen away.
If [font color="red"]25...f5 26.Qe5 Rfd8[/font] then:

If [font color="red"]27.e4 fxe4 28.Qxe4 Qf7[/font] then:

[font color="red"]29.Rd4 Bf5 30.Qe2 c2 31.Qd2 Rc5 32.f3 Rdc8[/font] gives Black an extra pawn (sitting on the seventh rank!) and more activity.
If [font color="magenta"]29.Bc4[/font] then Black wins after [font color="magenta"]29...Re8 30.Bb5 Bd7 31.Qb1 Rc5 32.Bd3 Bxa4.[/font]

[font color="darkred"]27.Rd4 Kf7 28.e4 fxe4 29.Rxe4 Qf6 30.Qh5+ Kf8[/font] gives Black an extra pawn, that being an advanced passer.; White has the Bishop pair and a slight advantage in space.

26.Rd4! f5 27.Qe5 Qf6!?

Black offers an exchange of Queens and loses some ground.
If [font color="red"]27...Kf7 28.e4 fxe4[/font] then:

[font color="red"]29.Bc4! Qg5 30.Qxg5 hxg5 31.h4 Ne7 32.Rxd8 Rxd8[/font] leaves Black with an extra pawn.
[font color="darkred"]29.Rxe4? Qf6 30.Qh5+ g6 31.Qe2 c2 32.Be5 Nc3[/font] wins the exchange.

28.Qxf6!

Taking the Queen exchange is White's best chance.
If [font color="red"]28.f3 c2 29.Bc4 Kh8 30.Rxc2 Nb4[/font] then:

[font color="red"]31.Qxf6 gxf6 32.Bxe6 Nxc2 33.Bxc8 Nxd4 34.Bxb7 Ne2+[/font] leaves Black with the exchange for a pawn.
If [font color="darkred"]31.Rxd8+ Rxd8[/font] then:

[font color="darkred"]32.Qxf6 gxf6 33.Bxe6 Rd1+ 34.Kf2 Nxc2 35.Bf4 Ra1[/font] leaves Black an full exchange to the good.
If [font color="magenta"]32.Bxe6?[/font] then Black wins after [font color="magenta"]32...Rd1+ 33.Kf2 Nd3+! 34.Ke2 Nxe5 35.Rc8+ Rd8.[/font]

28...gxf6 29.h3?!

This move is timid, but there is little better.
If [font color="red"]29.h4 c2[/font] then:

[font color="red"]30.Bc4 Rxc4! 31.Rxc4 Nxe3 32.R4xc2 Nxc2 33.Rxc2 Rd4[/font] is good enough to keep White alive.
If [font color="darkred"]30.Rd2?[/font] then Black wins after [font color="darkred"]30...Nb4 31.Bd6 Bb3 32.Bxb4 axb4 33.Bd3 Bxa4[/font] when White has nothing to stop the b-pawn from advancing.

If [font color="blue"]29.Bc4 Kf7 30.f4[/font] then:

[font color="blue"]30...Nxe3 31.Rxd8 Rxd8 32.Bxe6+ Kxe6 33.Rxc3 Rd1+[/font] leaves White teetering over a cliff.
[font color="darkblue"]30...Nb6!? 31.Rxd8 Rxd8 32.Bxe6+ Kxe6 33.Rxc3 Nxa4[/font] leaves White with counterplay on the queenside, but White must struggle up a steep hill for a draw.

If [font color="darkgreen"]29.f4[/font] then Black wins after [font color="darkgreen"]29...c2 30.Bc4 Rxc4 31.Rxc4 Nc3 32.Rxc3 Rd1+.[/font]

] 29...Kf7 30.Bc4 Ke7

If [font color="red"]30...Rc5 31.Bb3 Ke7 32.Kh2[/font] then:

[font color="red"]32...Nf4! 33.Rxd8 Kxd8 34.Bc2 Nd5 35.f4 Nb4[/font] continues to give Black the advantage, but the win is still problematic, although very likely.
[font color="darkred"]32...f4 33.exf4 Nxf4 34.Re4 Kf7 35.Re3 Rdc8[/font] leaves White with some counterplay in the center, but Black is still much better.

31.e4?

White's idea seems to be to change the guard on c1, but the process is too slow.
Better is [font color="red"]31.Bh4 Rc5 32.f3 Rdc8 33.Bxd5 Bxd5 34.Bg3 Ke6,[/font] but even that may be too much of a fight for a draw.

[center]BLACK: Hikaru Nakamura[/center]

[center][/center]

[center]WHITE: Nikita Vitiugov[/center][center]Position after 31.e3e4[/center]

31...Nf4!!

Black proffers the Knight and gets a winning position.

32.Rxd8 Rxc4!

Black finds the winning move.
Wrong is [font color="red"]32...Rxd8? 33.Bb5! Nh5 34.Bc7 Rc8 35.Bxa5 c2 36.exf5[/font] when White has an extra pawn; if 36...Bxf5?? then 37.g4! wins for White.

33.Bxf4

The acceptance of the Knight is forced. White must surrender a Rook.
If [font color="red"]33.Rh8?[/font] then after [font color="red"]33...Ne2+! 34.Kf1 Nxc1[/font] Black finds himself a piece to the good.

33...Kxd8 34.exf5 Bxf5 35.Be3

If [font color="red"]35.Bxh6 c2 36.g4 Bg6 37.Kf1 Rxa4 38.Ke2 Kd7[/font] gives Black three connected passers; it will cost White at least the exchange to take the pawn on c2.

[center]BLACK: Hikaru Nakamura[/center]

[center][/center]

[center]WHITE: Nikita Vitiugov[/center][center]Position after 35.Bf4e3[/center]

35...c2!

White must surrender a Rook in order to stop the pawn.

36.g4 Be4 37.Bb6+

If [font color="red"]37.Bxh6[/font] then after [font color="red"]37...Rxa4 38.Kf1 b5 39.Ke2 b4 40.Kd2 b3[/font] a Black pawn must queen.

37...Kd7 38.Bxa5 Rd4! 0-1

39...Rd1+ is devastating and there is nothing White can do to stop it.
Nikita Kirillovich resigns.

Jack Rabbit

(45,984 posts)

20. Morozevich - Giri, Round 2

Reply to Jack Rabbit (Reply #10)

Tue Feb 28, 2012, 09:10 PM

Feb 2012

Alexander Morozevich had been nipping at Nakamura's heels throughout the tornament and appeared to be the beneficiary of Naka's collapse until the last round, whenm he lost to Vitugov, who finished at the foot of the table.

This game came in the second round, when Moro and Naka were up and Anish Giri was down.
[center]

Alexander Morozevich
[/center][font size="1"]Photo by karpidis modified from flickr ([link:creativecommons.org/licenses/by-sa/2.0/deed.en|Creative Commons License], Attribution/Share Alike)
[/font]

Anish Giri - Alexander Morozevich
http://www.chessgames.com/perl/chessgame?gid=1652234
54th Torneo di Capadanno, Round 2
Reggio Emilia, 28 December 2011

Slav Queen's Gambit: Tikhi Opening

1.Nf3 d5 2.d4 Nf6 3.c4 c6 4.e3 Bg4 5.h3 Bh5 6.Nc3 e6 7.g4 Bg6 8.Ne5 Nbd7

For the more usual lines of the Tikhi Opening, see Jakovenko-Vitiugov, Russian Ch, Moscow, 2009.

9.h4

If [font color="red"]9.Nxg6 hxg6[/font] then:

If [font color="red"]10.Bg2 dxc4 11.Qe2 Nb6 12.0-0 Be7[/font] then:

If [font color="red"]13.Rd1[/font] then:

[font color="red"]13...g5 14.a4 a5 15.e4 Nfd7 16.Be3 e5 17.d5[/font] is equal; Black's extra pawn counts for nothing (Hebden-L'Ami, EU Ch, Liverpool, 2008).
If [font color="darkred"]13...Nfd7[/font] then:

[font color="darkred"]14.e4 e5 15.dxe5 Qc7 16.e6 fxe6 17.g5[/font] gives Black an extra pawn (Stefanova-Predojevic, Op, Chalkida, 2009).
[font color="magenta"]14.Ne4 Rc8 15.a4 a5 16.Nd2 Bd6 17.Nxc4 Nxc4 18.Qxc4[/font] regains the pawn with equality.

[font color="burgundy"]13.a4 a5 14.Rd1 Nfd5 15.e4 Nb4 16.Be3 0-0[/font] gives Black an extra pawn, but White has better pawns (Tukmakov-Malakhatko, Op, Winterthur, 2002).

If [font color="darkred"]10.Bd2 Bb4[/font] then:

If [font color="darkred"]11.Qb3 a5[/font] then:

[font color="darkred"]12.g5 Ne4 13.Nxe4 dxe4 14.Bxb4 axb4 15.h4 Qa5 16.Bg2[/font] gives White a small advantage in space (Vallejo-Najer, Op, Baku, 2011).
[font color="darkorange"]12.Bg2 Qc7 13.a3 Bxc3 14.Bxc3 a4 15.Qa2 Nb6 16.cxd5 exd5[/font] gives Black a slight advantage in space (Malaniuk-Movsesian, Rpd IT, Warsaw, 2005).

[font color="magenta"]11.Rc1 Qc7 12.a3 Bxc3 13.Bxc3 Ne4 14.Bg2 Nxc3[/font] gives Black a slight advantage in space (Bareev-Najer, Op, Philadelphia, 2009).

9...dxc4 10.Nxg6 hxg6 11.g5

If [font color="red"]11.Bxc4 Bb4 12.Bd2 Bxc3[/font] then:

If [font color="red"]13.bxc3 Ne4 14.Qf3 Nxd2 15.Kxd2[/font] then:

[font color="red"]15...Ne5 16.Qe2 Nxc4+ 17.Qxc4 Rxh4 18.Rab1 Rxh1 19.Rxh1 Kd7 20.f4 Kc7 21.Rh7 Qg8 22.Qc5[/font] draw (Stohl-Timoshchenko, Czech ChT, 2005).
If [font color="darkred"]15...Rxh4[/font] then:

[font color="darkred"]16.Rxh4 Qxh4 17.Rh1 Qf6 18.Rh8+ Nf8![/font] is equal.
If [font color="magenta"]16.Ba6!?[/font] then:

[font color="magenta"]16...Rb8 17.Rxh4 Qxh4 18.Rh1 Qg5 19.Rh8+ Ke7[/font] gives Black a comfortable game.
If [font color="darkorange"]16...bxa6!?[/font] then:

If [font color="darkorange"]17.Rxh4 Qxh4 18.Rh1 Qd8[/font] then:

If [font color="darkorange"]19.Rh8+ Nf8 20.Qxc6+[/font] then:

[font color="darkorange"]20...Ke7! 21.Qb7+ Ke8 22.Qc6+ etc.[/font] draws.
[font color="purple"]20...Qd7?? 21.Qxa8+!! Ke7 22.Qxf8+[/font] leads to mate.

If [font color="hotpink"]19.Qxc6?? Ke7 20.Qxa6 Rb8[/font] then:

[font color="hotpink"]21.g5 Qb6 22.Qa3+ Qd6 23.Qxd6+ Kxd6[/font] leaves White a piece down
If [font color="burgundy"]21.c4 Qb6[/font] then:

[font color="burgundy"]22.Qxb6 Rxb6 23.Kc2 e5[/font] leaves Black a piece down.

[font color="darkpink"]22.Qa3+ Kf6 23.f4 Qb2+ 24.Qxb2 Rxb2+[/font] leaves Black a piece down.

If [font color="purple"]17.Qxc6?[/font] leaves White a piece down after [font color="purple"]17...Rb8! 18.Rab1 Rb6! 19.Rxb6 axb6 20.Rxh4 Qxh4.[/font]

[font color="darkpink"]13.Bxc3 Ne4 14.h5 gxh5 15.gxh5 Nxc3 16.bxc3 Qa5[/font] gives Black a small advantage in space (J. Cori Tello-Hovhannisyan, World Jr Ch, Chotowa, Poland, 2010).

11...Nd5 12.Bxc4 Bb4

If [font color="red"]12...Be7 13.Qf3[/font] then:

[font color="red"]13...N7b6 14.Bb3 Nb4 15.Ke2 c5 16.Qxb7[/font] is equal (Lautier-Chernin, Rpd Op, Corsica, 2001).
If [font color="darkred"]13...Qc7 14.Bb3[/font] then:

[font color="darkred"]14...N5b6?! 15.e4! Rf8 16.Bf4 Bd6 17.Be3 e5 18.Rc1[/font] gives White a fair advantage in space (Aronian-Gufstafsson, German I-Net Ch, Cyberspace, 2004).
[font color="magenta"]14...Qa5! 15.Bd2 Nxc3 16.Bxc3 Bb4 17.Rc1 Nb6 18.Kd2[/font] is equal.

13.Bd2 Qe7 14.a3 Nxc3 (N)

[font color="red"]14...Ba5 15.Qc2 Nxc3 16.Bxc3 Bxc3+ 17.Qxc3 Nb6 18.Bb3[/font] is equal and is shortly agreed drawn (Tregubov-Inarkiev, Russian ChT, Dagomys, 2009).

15.bxc3

The game is equal.
[font color="red"]15.Qb3 Nb5 16.Qxb4 Nd6 17.Be2 Nb6 18.Rc1 Nf5[/font] is equal.

15...Ba5 16.f4

[font color="red"]16.Qa4?! Nb6 17.Qxa5 Nxc4 18.Qb4 Nd6[/font] gives Black a small advantage in freedom.

16...0-0-0 17.Qb3!?

17.Qa4 carries with it a slight initiative.
[font color="red"]17.Qa4 Bb6 18.Qb3 Rh7 19.0-0-0 Rdh8 20.Be1 Ba5[/font] remains equal.

[center]BLACK: Alexander Morozevich[/center]

[center][/center]

[center]WHITE: Anish Giri[/center][center]Position after 17.Qd1b3[/center]

17...Nb6!

Black makes sure that neither Qxb7 nor Qa5 is on the table; he now has a small advantage with pressure on three backward pawns.

18.Bd3 Kb8 19.Ke2!?

White chooses to get his Rook connected this way; Fritz recommends putting more pressure on the d5 square first.
[font color="red"]19.Be4 Qc7 20.Bf3 Nd5 21.Rb1 Ne7 22.Kf2 Nf5[/font] continues to give Black a small advantage with pressure on key points.

19...Qd7!

Black has a fair advantage with grater activity and freedom.
If [font color="red"]19...Qc7 20.Rab1 c5 21.Be4 c4 22.Qc2 Nd5[/font] continues to give Black a small advantage in space.

20.Be4 f6

If [font color="red"]20...Nc8 21.Be1[/font] then:

[font color="red"]21...Rdg8 22.a4! Ne7 23.c4 Bxe1 24.Raxe1 Rh7 25.Qa3 Rgh8[/font] soon gives Black an extra pawn.
[font color="darkred"]21...Rde8 22.a4 Nd6 23.Bf3 f6 24.gxf6 gxf6[/font] gives White a slimmer edge in space.

21.gxf6

[font color="red"]21.Bxg6!? e5! 22.fxe5 Qg4+ 23.Kd3 fxe5 24.Rag1 Qc8[/font] gives Black a free and active position in compensation for the pawn.

21...gxf6 22.Rag1 e5 23.fxe5

[font color="red"]23.Rxg6 exd4 24.cxd4 Bxd2 25.Kxd2 Rhe8 26.Bd3 Qe7[/font] puts pressure on e3.

23...fxe5 24.Rg5!?

It would be better to just take the pawn.
[font color="red"]24.Rxg6 Rhe8 25.Rf1 exd4 26.Rf7 Re7 27.Rxe7 d3+[/font] continues to gives Black a small advantage in space.

[center]BLACK: Alexander Morozevich[/center]

[center][/center]

[center]WHITE: Anish Giri[/center][center]Position after 24.Rg1g5[/center]

24...exd4!!

There are two kinds of sacrifices: Sound ones and mine. -- Mikhail Tal
This is a Tal-like sacrifice. It's flashy and, most importantly, it confounds White, but with correct play, White will be no worse off than before.

25.Rxa5?

White falls into the trap.
If [font color="red"]25.exd4![/font] then:

If [font color="red"]25...Nd5 26.Bxd5 cxd5 27.Kd1 Bc7 28.Kc1 Qf7[/font] gives Black a small advantage in space.
If [font color="darkred"]a) 25...Rhe8!?[/font] then:

If [font color="darkred"]26.Kd3 Nd5 27.Bxg6 Rf8 28.Be4[/font] then:

[font color="darkred"]28...Rf2 29.Be3 Rf6 30.Bd2 Qf7 31.Rb1 Bb6 32.Be1 Re6[/font] gives Black a small advante in that he can penetrate White's position on the f-file; White has a remote passer and more space.
[font color="darkorange"]28...Rde8?! 29.Rxd5! cxd5 30.Qxd5! Qc7 31.Rb1 Bb6 32.h5[/font] gives White two extra pawns and a distant passer.

[font color="magenta"]26.Bf4+?! Ka8 27.Be5 Nd5! 28.Bxd5 cxd5 29.Rhg1 Rc8[/font] gives Black the initiative as White cannot allow 30...Rxc3.

If [font color="darkred"]b) 25...Rh5 26.Rxg6 Nd5 27.Kd1[/font] then:
If [font color="darkred"]27...Nxc3+ 28.Bxc3 Bxc3 29.Qxc3 Qxd4+ 30.Qxd4 Rxd4+[/font] then:

[font color="darkred"]31.Kc2 Rxe4 32.Rg8+ Kc7 33.Rg7+ Kb6 34.Rb1+ Rb5 35.Rxb5+ cxb5[/font] continues to give Black a small advantage in space.
[font color="burgundy"]31.Kc1?[/font] prevents White from checking on b1 and now [font color="burgundy"]31...Rxe4 32.Rg8+ Kc7 33.Rg7+ Kb6 34.Rf1 Rc4+![/font] drives the White King to the center, making both of White's pawns vulnerable; Black should win.

If [font color="magenta"]27...Re8!? 28.Bxd5! Rxd5 29.a4 Qh7[/font] then:

[font color="magenta"]30.Rxc6! Qd3 31.Qxd5 Qb1+ 32.Bc1 Qd3+ 33.Bd2 Qb1+ etc.[/font] draws.
If [font color="darkorange"]30.Rhg1 Qxh4 31.Rxc6 Qf2[/font] then:

[font color="darkorange"]32.Rg7 Qxd2+ 33.Kxd2 Rxd4+ 34.Kc2 Re2+ 35.Kb1 Re1+ 36.Kc2 etc.[/font] draws.
If [font color="purple"]32.Re1??[/font] then Black wins after [font color="purple"]32...Rxe1+! 33.Bxe1 Rxd4+ 34.cxd4 Qxe1+ 35.Kc2 Qe4+!.[/font]

25...Rhe8!

Black regroups his pieces, bringing the King's Rook to the center and preparing to redeply the Queen to the kingside.
If [font color="red"]25...Qg4+ 26.Bf3 d3+ 27.Kf2[/font] then:

[font color="red"]27...Rdf8 28.Qd1 Rxh4 29.Rxh4 Qxh4+[/font] gives Black a devastating attack.
If [font color="darkred"]27...Rhf8!? 28.Qd1! Nd5![/font] then:

[font color="darkred"]29.Rg1 Qxh4+ 30.Kg2 Qe7 31.Ra4 Nxe3+ 32.Bxe3 Qxe3[/font] gives White three pawns for a Bishop.
If [font color="magenta"]29.Rxd5?[/font] then Black wins after [font color="magenta"]29...Rxd5! 30.e4 Rg5 31.Bxg5 Qxe4.[/font]

26.Bg2

White considerably shortens his agony.
He'll put up a more stubborn fight after [font color="red"]26.cxd4 Rxe4 27.Kd1 Rxd4!! 28.exd4 Qxd4 29.Qb4 Qa1+[/font] Black wins back the sacrificed Rook.
The sacrifice is much stronger than [font color="darkred"]27...Nd5[/font] then:

[font color="darkred"]28.Kc1 Rde8 29.h5 gxh5 30.Rxh5 Nxe3[/font] gives Black an overwhelming position.
If [font color="magenta"]28.Ra4[/font] then Black wins after [font color="magenta"]28...Rde8 29.Kc1 Qf5 30.Qc2 Qg4 31.Qd1 Qe6.[/font]

26...dxe3!

Black pries open the center, White is toast.

27.Bc1

We now turn for commentary to the incomparable " target="_blank">Nat King Cole.
If [font color="red"]27.Bxe3 Qd2+ 28.Kf1 Qd3+[/font] then:

If [font color="red"]29.Kg1[/font] then after [font color="red"]29...Qxe3+ 30.Kh2 Qf4+ 31.Kh3 Rd3+[/font] Black gives mate on the next move.
If [font color="darkred"]29.Ke1[/font] then [font color="darkred"]29...Qxe3+ 30.Kf1 Qe1#.[/font]

27...Qd3+

Also good is [font color="red"]27...Qg4+ 28.Bf3 Qg3 29.Bxe3 Qf4 30.c4 Nxc4.[/font]

28.Ke1

[center]BLACK: Alexander Morozevich[/center]

[center][/center]

[center]WHITE: Anish Giri[/center][center]Position after 28.Ke2e1[/center]

28...e2

Even better is [font color="red"]28...Rf8 29.Rh3 Nc4 30.Rf3 Nd2 31.Rxf8 Rxf8.[/font]

29.Bf4+ Ka8 30.Kf2 Rf8 31.Qb4 Nc4 32.Qa4 Nxa5

A quicker win is [font color="red"]32...Rxf4+ 33.Bf3 Qxf3+ 34.Ke1 Qf2#.[/font]

33.Bf3 b5 0-1

[font color="red"]34.Qb4 Qf5[/font] then:

[font color="red"]35.Kg2 Rd1 36.Rxd1 exd1Q 37.Bxd1 Qxf4[/font] leaves White up by a Rook.
If [font color="darkred"]35.Bxe2[/font] then White loses material before being mated after [font color="darkred"]35...Nc4 36.Kg2 Qe4+.[/font]

Mh. Giri resigns.

Jack Rabbit

(45,984 posts)

11. 87th International Chess Congress, Hastings

Reply to Jack Rabbit (Reply #1)

Mon Feb 27, 2012, 03:57 PM

Feb 2012

[center][/center]

[center]William the Conqueror at the Battle of Hastings, 1066[/center][center]from the Bayeux Tapestry[/center]
[font size="1"]Image from Wikipedia http://commons.wikimedia.org/wiki/File:Bayeux_Tapestry_WillelmDux.jpg (Public Domain)
[/font]

Jack Rabbit

(45,984 posts)

14. Wang Yue - A. Vovk, Round 8

Reply to Jack Rabbit (Reply #11)

Mon Feb 27, 2012, 04:04 PM

Feb 2012

[center][/center]

[center]Wang Yue[/center]
[font size="1"]Photo by http://commons.wikimedia.org/wiki/User:Samson1964 Frank Hoppe in http://commons.wikimedia.org/wiki/File:Wang_yue_20081119_olympiade_dresden.jpg Wikimedia Commons (Public Domian)
[/font]

Wang Yue - Andrey Vovk
http://www.chessgames.com/perl/chessgame?gid=1653049
87th International Chess Congress, Round 8
Hastings, 4 January 2012

West India Game: King's Indian Defense (Main Line/Gligoric Variation)

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center][/center]West India Game: King's Indian Defense (Main Line)[center]Position after 6...e5[/center]

7.Be3

The text is the Gligoric Variation.
If [font color="red"]7.0-0[/font] then:

[font color="red"](Rio de Janeiro Variation)[/font] If [font color="red"]7...Nbd7 8.Re1 c6 9.Bf1[/font] then:

If [font color="red"]9...exd4 10.Nxd4[/font] then:

[font color="red"]10...Re8 11.Rb1 Nc5 12.f3 a5[/font] then:

If [font color="red"]13.Be3 Nfd7 14.Qd2[/font] then:

If [font color="red"]14...Ne5[/font] then:

If [font color="red"]15.Red1 Qe7 16.Nb3 a4[/font] then:

[font color="red"]17.Nxc5 dxc5 18.Rbc1 Be6 19.Qc2 Bxc4 20.Nxa4[/font] gives White better pawns and a small advante in space (Filip-Tolush, IT, Bucharest, 1953).
[font color="burgundy"]17.Nd4 h5 18.Nc2 Bf8 19.Bh6 Be6 20.Bxf8 Rxf8[/font] is equal (Kniazer-Clarke, Ol, Amsterdam, 1954).

If [font color="darkred"]15.Rbd1 a4[/font] then:

[font color="darkred"]16.Rb1 f5 17.exf5 gxf5 18.b4 axb3 19.axb3[/font] is equal (Gligoic-Ligterink, Donner Mem, Amsterdam, 1994).
[font color="magenta"]16.Nc2 Qb6 17.Qc1 Bf8 18.Nd4 Qb4 19.Ndb5[/font] gives White a the initiative with the threat of [i[20.Nc7! and if Black plays 19...cxb5? then White replys 20.Nd5! Qa5 (forced) 21.Nf6+ winning the exchange (Bilek-Honfi, Hungarian Ch, 1973). Fritz gives 19...Qa5 as equal; in the game, Black played 19...Be6 and struggled successfully for draw.

[font color="burgundy"]14...a4 15.b4 axb3 16.axb3 Ne5 17.Red1 Qe7 18.Kh1[/font] is equal (Gyimesi-Miroshnichenko, Bundesliga 0405, Germany, 2004).

[font color="darkred"]13.Bf4[/font] then:

[font color="darkred"]13...d5!? 14.exd5 Rxe1 15.Qxe1 Nxd5 16.cxd5 Bxd4+ 17.Be3[/font] gives White a tactical edge by being able to reload on e3 with his Queen, forcing the Black Queen to move to cover the Knight, thus saving the pawn at d5 (Tal-Grigorian, Soviet Ch, Leningrad, 1977). Overall, this variation gives White a fair advange.
[font color="magenta"]13...Nh5 14.Be3 f5 15.exf5 gxf5 16.Qd2 f4 17.Bf2[/font] gives White the better center; the Knight can only be exchanged at d4 and Black's Rook can be driven from e8 (Swiercz-Pruijssers, Cultural Village, Wijk aan Zee, 2010).

If [font color="darkred"]10...Ng4 11.h3 Qb6 12.hxg4 Qxd4[/font] then:

If [font color="darkred"]13.g5 Qe5 14.Be3 f6 15.Qd2 fxg5[/font] then:

If [font color="darkred"]16.Rad1 g4[/font] then:

[font color="darkred"]17.Bd4 Qxd4 18.Qxd4 Bxd4 19.Rxd4 Ne5 20.Rxd6 Bd7[/font] is equal (Ftacnik-Vogt, Keres Mem, Tallinn, 1983).
[font color="burgundy"]17.Qxd6 Qe8 18.Bd4 Ne5 19.Re3 Qf7 20.Ree1 Re8[/font] gives Black a comfortable game relative White's; the White Queen in in danger of being trapped (Vilela-Vogt, IT, Hallw, 1981).

[font color="darkpink"]16.Bxg5 Nb6 17.Rac1 Bg4 18.Nd1 Rae8 19.Bh4 Qh5[/font] is equal (Tal-Bielczyk, IT, Riga, 1981).

If [font color="magenta"]13.Be3[/font] then:

If [font color="magenta"]13...Qxd1 14.Raxd1 Ne5[/font] then:

[font color="magenta"]15.g5 Be6! 16.c5 dxc5 17.Bxc5 Rfe8 18.f4[/font] gives White a small advantage in space (Mikhalchishin-Balashov, IT 8586, Hastings, 1985).
[font color="burgundy"]15.Rxd6 Be6 16.c5 Nxg4 17.Bd4[/font] is slightly better.

If [font color="darkorange"]13...Qe5 14.g5 Qe7 15.Qd2 Ne5 16.Rad1[/font] then:

If [font color="darkorange"]16...Be6 17.b3 Rad8 18.Bd4 f6 19.f4[/font] then:

If [font color="darkorange"]19...Ng4?![/font] then:

[font color="darkorange"]20.Be2! h5 21.Nd5 Bxd5 22.exd5 Qd7 23.Bxg4 Qxg4 24.Re7[/font] gives White a Rook on the seventh rank and the advantage in space (Pinter-Knaak, TM, Zinnowitz, 1980).
[font color="burgundy"]20.Nd5 Qf7 21.Nxf6+ Nxf6 22.gxf6 Bxf6 23.g3[/font] gives White a small advantage in space (Alexandria-Vogt, IT, Halle, 1981).

[font color="hotpink"]19...fxg5 20.fxe5 dxe5 21.Nd5 cxd5 22.exd5[/font] continues to give Black a comfortable advantage.

[font color="purple"]16...Rd8?! 17.f4! Ng4 18.Bc5 Bf8 19.Ba3 Qc7 20.e5[/font] gices White a strong advantage.

If [font color="darkred"]a) 9...Re8 10.d5 c5 11.a3 Rf8[/font] then:

If [font color="darkred"]12.g3 Ne8 13.b4[/font] then:

[font color="darkred"]13...h6 14.Nh4[/font] then:

[font color="darkred"]14...Ndf6 15.bxc5 dxc5 16.a4 a5 17.Rb1 Nd6 18.Ba3[/font] gives White the advantage in space and a slight initiative (Christoffel-Boleslavsky, IT, Gronigen, 1946).
[font color="burgundy"]14...Kh7 15.Qc2 b6 16.Bd2 Bf6 17.Ng2 Ba6 18.Ne3[/font] gives White the advantage in space, but he needs to exchange pawns somewhere for that to be worth anything (Gligoric-Ju. Bolbochán, IT, Mar del Plata, 1953).

[font color="darkorange"]13...Qe7 14.Rb1 f5 15.exf5 gxf5 16.Bd2 Bf6 17.Bh6[/font] gives White a comfortable advantage in space and the intiative; Black's game is badly cramped (Pachman-Benko, IT, Buenos Aires, 1960).

[font color="magenta"]12.Rb1 Ne8 13.b4 b6 14.g3 f5 15.Ng5 Ndf6[/font] (Taimanov-Uhlmann, Alekhine Mem, Moscow, 1956).

If [font color="darkred"]b) 9...a5 10.Rb1 Re8 11.d5 Nc5 12.b3 Bd7 13.a3 cxd5 14.cxd5 b5 15.b4 axb4[/font] then:

If [font color="darkred"]16.Rxb4!?[/font] then:

If [font color="darkred"]16...Rb8[/font] then:

If [font color="darkred"]17.Bd2 Qa5 18.Qa1 Qa7 19.Be3 Rec8[/font] then:

[font color="darkred"]20.h3 Ra8 21.Nxb5 Bxb5 22.Bxb5 Qxa3 23.Qxa3 Rxa3 24.Nd2[/font] leaves White better on the open queenside (Kozma-Vogt, Capablanca Mem, Cienfuegos, Cuba, 1976).
[font color="burgundy"]20.Bxb5 Bxb5 21.Rxb5 Rxb5 22.Nxb5 Qa6 23.Bxc5 Rxc5[/font] gives White command of the c-file againt White's weak extra pawn (W. Schmidt-Knaak, ZT, Pula, 1975).

[font color="darkpink"]17.Qc2 Qa5 18.Qb2 Na6 19.Rb3 Nc5[/font] draw (Szmetan-Ftacnik, IT, Amsterdam, 1977).

[font color="darkorchid"]16...Qa5 17.Qd2 Rec8 18.Qb2 Rab8 19.Bd2 Na6 20.Rb3[/font] is equal.

If [font color="magenta"]16.axb4 Na4?![/font] then:

If [font color="magenta"]17.Nxb5!? Qb8! 18.Qd3 Bxb5 19.Qxb5 Nc3 20.Qd3[/font] then:

[font color="magenta"]20...Nxb1!? 21.Qxb1 Nd7[/font] is equal (Csala-Stuchly, Op, Tatras, Slovakia, 2001).
[font color="purple"]20...Rc8! 21.Bd2 Nxb1 22.Qxb1 Nd7[/font] gives Black a small advantaghe in space.

[font color="darkorange"]17.Nxa4! Rxa4 18.Bd3 Rf8 19.Bc2 Ra8 20.Bg5 h6[/font] is equal (Savic-Bielczyk, Op, Sandomierz Vitrobud, Poland, 1976).

[font color="darkred"](Aronin Variation)[/font] If [font color="darkred"]7...Nc6 8.d5 Ne7[/font] then:

If [font color="darkred"]9.Ne1 Nd7[/font] then:

If [font color="darkred"]10.Nd3 f5 11.Bd2 Nf6 12.f3 f4 13.c5 g5 14.cxd6 cxd6 15.Nf2[/font] then:

If [font color="darkred"]15...h5 16.h3 Ng6 17.Qc2 Rf7 18.Rfc1[/font] then:

If [font color="darkred"]18...g4 19.hxg4 hxg4 20.fxg4[/font] (White has won a pawn) [font color="darkred"]20...Ne8 21.a4 Bf6[/font] then:

[font color="darkred"]22.Ncd1 Bh4 23.Nh3 Rg7 24.Ndf2 Nf8 25.Ra3[/font] gives White an extra pawn, more freedom and more space (Sosonko-Ye Jiangchuan, IT, Hong Kong, 1989).
[font color="#FF80CD"]22...Rh7? 23.Na4 Bd7 24.Nb6 Rb8 25.Nxd7 Nxd7 26.Nh3[/font] gives White a tremendous advantage in space.

If [font color="magenta"]18...a6 19.a4[/font] then:

If [font color="magenta"]19...Bf8 20.a5[/font] then:

If [font color="magenta"]20...g4 21.fxg4 hxg4 22.hxg4[/font] then:

If [font color="magenta"]22...b5 23.axb6 Qxb6 24.Na4 Qa7 25.Ba5 Rb8[/font] then:

If [font color="magenta"]26.Bc7 Rb7 27.Bxd6 Bxd6 28.Qxc8+[/font] gives White two extra pawns (Sosonko-Rogic, Op, Bled, 1997).
If [font color="purple"]26.g5[/font] then:

If [font color="purple"]26...Nh7?! 27.Nb6[/font] then:

[font color="purple"]27...f3? 28.Bxf3 Rxb6 29.Bxb6 Qxb6 30.Qxc8 Nxg5 31.Rxa6[/font] gives White two extra pawns (Rogers-Sznapik, Ol, Thessalonik, 1988).
[font color="darkpink"]27...Bb7 28.Bh5 Kg7 29.Qa4 Nxg5 30.Nd7[/font] barely keeps Black in the game.

[font color="hotpink"]26...Ng4! 27.Bxg4 Bxg4 28.Ra3 f3[/font] is equal (Azmapairashvili-Cvitan, IT, Tilburg, 1993).

[font color="burgundy"]22.Bf3 Bh4 23.Ncd1 Bg3 24.Nh3 Qh4 25.Ndf2[/font] still, leaves Whte with an extra pawn ((Valden-Tsanas, Op, Glyfada, 2001).

If [font color="darkorange"]20...b5 21.axb6 Qxb6 22.Na4 Qa7 23.Ba5[/font] then:

[font color="darkorange"]23...Rb7 24.Kf1 Bd7 25.Ra3 Be7 26.Rc3 Bd8 27.b4[/font] gives White a slight advantage (Sosonko-Fedorowicz, Rpd TM, Cannes, 1992).
[font color="purple"]23...g4 24.fxg4 hxg4 25.Bb6 Qe7 26.hxg4 f3 27.Bxf3[/font] gives White two extra pawns (Seawald-Shezer, Op, Chicago, 1993).

[font color="darkpink"]19...b6 20.Ra3 Bf8 21.Na2 Nh4 22.Qd1 Rg7 23.Be1[/font] gives White more active minor pieces (Ree-Browne, Op, Lone Pine, 1978).

If [font color="magenta"]15...Ng6 16.Qc2 Rf7 17.Rfc1[/font] then:

If [font color="magenta"]17...Bf8 18.a4 h5 19.Nb5 Ne8 20.h3[/font] then:

[font color="magenta"]20...Nh4 21.Ra3 a6 22.Rc3 Bd7 23.Na3[/font] gives White more freedom (Kozul-Srebrnic, Op, Nova Gorica, 1999).
If [font color="darkorange"]20...a6?! 21.Na3[/font] then:

[font color="darkorange"]21...Rg7? 22.Nc4 Bd7 23.Ba5[/font] gives White a powerful queenside attack (Goganov-Koushnik, World Jr Ch, Chennai, 2011).

Little better is [font color="purple"]21...Rc7 22.Nc4 Rb8 23.Qb3 Bd7 24.Na5.[/font]

If [font color="darkorange"]17...Ne8 18.a4 h5 19.h3[/font] then:

[font color="darkorange"]19...Nh4 20.Qd1 Bf8[/font] then:

[font color="darkorange"]21.Ra3 Rg7 22.Be1 Nf6 23.Nb1 Ng6 24.Rac3[/font] gives White command of the c-file, better Bishops and more space (Sosonko-Pflichthofer, Op, San Bernardino, California, 1991).
[font color="burgundy"]21.Nb5 Rg7 22.Rc3 a6 23.Na3 Nf6 24.Nc4[/font] gives White more active Bishops and attacking chances on the queensiode; Black is better on the kingside[/font] gives White more active Bishops (Mkrtchian-Arakahmia, Euro Club Cup W, Plovdiv, 2010).
If [font color="darkpink"]19...h4?! 20.Ng4! Bxg4[/font] then:

[font color="darkpink"]21.hxg4 Rc7 22.Be1 a6 23.Qd1 Nf8 24.Bf2[/font] gives White a significant advantage in space.
[font color="hotpink"]21.fxg4 Nf6 22.a5 Rc8 23.Be1 a6 24.Bf2[/font] gives White the advantage in space.

If [font color="magenta"]10.Be3 f5 11.f3 f4 12.Bf2 g5[/font] then:

If [font color="magenta"]13.a4[/font] then:

If [font color="magenta"]13...Ng6 14.a5[/font] then:

If [font color="magenta"]14...Rf7[/font] then:

If [font color="magenta"]15.b4 Bf8[/font] then:

If [font color="magenta"]16.c5 Nf6[/font] then:

If [font color="magenta"]17.cxd6 Bxd6 18.Nd3[/font] then:

If [font color="magenta"]18...Rg7 19.Nc5 Nf8 20.Nb5 g4[/font] then:

If [font color="magenta"]21.Bh4 h5[/font] then:

[font color="magenta"]22.Bc4 Qe7 23.Kh1 a6 24.Nxc7 Qxc7 25.Bxf6[/font] gives White more activity and space (Korchnoi-J. Polgar, IT, Pamplona, 1990).
[font color="burgundy"]22.Nxd6 cxd6 23.Nd3 Ng6 24.Bg5 Nf8 25.Bxf6[/font] gives White a slight advantage in that he can seize command of the c-file (Elliott-Rosch, Corres, 1996).

[font color="darkpink"]21.Qeq Qe8 22.fxg4 Nxg4 23.Ra3 Qg6 24.Bf3 Qh6[/font] is equal (Korchnoi-Dr. Nunn, IT, Amsterdam, 1990).

[font color="burgundy"]18...h5 19.Nc5 Nf8 20.Nb5 g4 21.Bh4 Rg7 22.Qb3[/font] gives White a powerful spatial advantage on the kingside (Psakhis-Kiminski, Op, Gronigen, 1993).

If [font color="darkorange"]17.c6 h5 18.Kh1[/font] then:

[font color="darkorange"]17...Rh7? 19.cxb7 Bxb7 20.a6 Bc8 21.Nb5 g4 22.Nxa7[/font] gives White an extra pawn, active minor pieces and a small advantage in space (Korchnoi-Xie Jun, Match, Wentzou, 1995).
[font color="purple"]18...bxc6 19.dxc6 Be6 20.Ba6 Qe8 21.b5[/font] still doesn't give Black a lot of hope.

[font color="burgundy"]16.Nd3 h5 17.c5 Nf6 18.cxd6 cxd6 19.h3[/font] gives White a small advantage in space (Sammalvuo-Hajenius,Op, Reykjavik, 2011).

If [font color="darkorange"]15.c5 Nxc5 16.Bxc5 dxc5[/font] then:

[font color="darkorange"]17.Bc4 Kh8 18.a6 bxa6 19.Bxa6 Bf8[/font] gives White more activity and stronger pawns (Kozul-Dr. Nunn, Euro ChT, Debrecen, 1992).
If [font color="purple"]17.a6!? b6 18.Bc4 Bf8[/font] then:

[font color="purple"]19.g4?! Bd6 20.Qe2 h5 21.h3 Rh7[/font] gives Black the advantage on the kingside (Lutz-Gelfand, IT, Munich, 1994).
[font color="hotpink"]19.d6 c6 20.Nd3 Qxd6 21.Qb3 Qe7[/font] gives Black more kingside space.

If [font color="darkorange"]14...h5[/font] then:

If [font color="darkorange"]15.Nb5 Nf6 16.Nxa7 Bd7 17.c5[/font] then:

If [font color="darkorange"]17...g4? 18.c6![/font] then:

If [font color="darkorange"]18...g3 19.hxg3 fxg3 20.Bxg3 Rxa7 21.cxd7[/font] then:

[font color="darkorange"]21...h4 22.Bf2 Ra8 23.Nc2 Bh6 24.Ne3 Bf4 25.Nf5[/font] gives White an extra pawn (not counting the deadwood at d7), an active Knight and the Bishop pair (Korchnoi-Xie Jun, TM, Prague, 1995).
If [font color="purple"]21...Nxd7[/font] then:

[font color="purple"]22.f4!? exf4 23.Bf2 Ra8 24.Bxh5 Nde5 25.Bxg6 Nxg6 26.Qh5[/font] gives White an extra pawn, the initiative and a comortable advantage space (W. Schmidt-G. Hernández, Ol, Moscow, 1994).
[font color="hotpink"]22.Bf2! Ra8 23.Nd3 h4 24.Qd2 Kh7 25.Qe1[/font] gives White an extra pawn and a comortable advantage space; White would profit most from attacking on the queenside.

[font color="burgundy"]18...bxc6 19.Nxc6 Qe8 20.Ra4 g3 21.hxg3 fxg3 22.Bxg3[/font] gives White an extra pawn (a remote passer), more active pieces and more space (Lekic-Nikolic, Yugoslav ChT Herceg Novi, 2001).

Black hangs on longer after [font color="darkpink"]17...Rxa7 18.c6 Qa8 19.cxd7 Rxa5 20.Rc1 Qd8 21.Qc2[/font] but the situation is still grim (Sakalauskas-Labuckas, Lithuanian Ch, Kaunas, 2001).

If [font color="purple"]15.b4!?[/font] then:

If [font color="purple"]15...Nf6! 16.c5 g4[/font] then:

[font color="purple"]17.cxd6?! cxd6 18.Nb5 g3 19.hxg3 fxg3 20.Bxg3[/font] gives White only a small advantage in space (Ftacnkk-Smirin, IT, Biel, 1993).
[font color="darkpink"]17.a6! bxa6 18.Bxa6 h4 19.Bxc8 Qxc8 20.fxg4 Nxg4 21.Qf3[/font] gives White the advantage in space on the queenside and checks Black's advance on the other wing.

[font color="hotpink"]15...a6!? 16.Na4 Nf6 17.c5 g4 18.cxd6 cxd6 19.Rc1[/font] gives White command of the queenside dark squares

If [font color="darkorange"]13...a5 14.Nd3 b6[/font] then:

If [font color="darkorange"]15.b4 axb4 16.Nxb4 Nf6[/font] then:

If [font color="darkorange"]17.Nd3 h5 18.Nb5[/font] then:

If [font color="darkorange"]18...g4[/font] then:

[font color="darkorange"]19.Bh4?! Qd7 20.fxg4 Nxe4! 21.Bf3 Nf6[/font] is equal and soon agreed drawn (Noomen-Hotting, Corres, 2004).
If [font color="purple"]a) 19.Be1?![/font] then:

[font color="purple"]19...g3?! 20.hxg3 fxg3 21.Bxg3 Ng6 22.a5 h4 23.Be1[/font] gives White a comfortable advantage in space (Ernazarov-Aleshina. Corres, 2001).
[font color="hotpink"]19...gxf3! 20.Bxf3 Ng4 21.Bd2 c6 22.dxc6 Nxc6 23.Nf2[/font] is equal.

[font color="purple"]b) 19.Qd2 gxf3 20.Bxf3 Ng4 21.a5 bxa5 22.Rxa5 Rxa5 23.Qxa5[/font] gives White a fair advantage in space.

[font color="darkpink"]18...Ng6?! 19.a5! bxa5 20.Be1 g4 21.Rxa5 Rb8 22.Nb4[/font] gives White a queenside attack and a comfortable advantage in space (Kozul-Rogic, Op, Bled, 1997).

[font color="hotpink"]17.Ra3 Bd7 18.Nb5 Kh8 19.Be1 Rg8 20.g4 fxg3 21.hxg3[/font] is equal (Jussupow-Kasparov, Ol, Yerevan, 1996).

If [font color="purple"]15.Be1 Nf6[/font] then:

If [font color="purple"]16.Nf2 h5 17.h3 Kh8 18.Nb5 Neg8 19.b4[/font] then:

[font color="purple"]19...Rf7 20.bxa5 bxa5 21.c5 Bf8 22.cxd6 cxd6 23.Rc1[/font] gives White more piece activity and a comfortable advantage in space (Nielsen-Kotronias, IT 0304, Hastings, 2004).
If [font color="hotpink"]19...Nh6 20.bxa5[/font] then:

If [font color="hotpink"]20...Rg8 21.axb6 cxb6 22.a5 g4[/font] then:

[font color="hotpink"]23.axb6!? Rxa1 24.Qxa1 gxf3 25.gxf3 Qxb6 26.Kh2[/font] gives White an extra pawn and a slight edge in space (Stull-Schrancz, Corres, 2001).
[font color="burgundy"]23.hxg4! hxg4 24.Nxg4 Nhxg4 25.fxg4 Bf8 26.Bh4[/font] gives White a comfortable advantage in space and a pin agianst f6.

[font color="darkpink"]20...bxa5? 21.Bc3 Qe7 22.Qd2 g4 23.Bxa5 gxf3 24.Bxf3[/font] gives White an extra pawn and a comfortable advantage in space.

[font color="darkorchid"]16.Nb5 g4 17.fxg4 Nxe4 18.Bf3 Ng5 19.Nf2[/font] gives White a small advatgae in space (W. Schmidt-Dobrowolski, Polish ChT, Krynica, 1997).

If [font color="darkorange"]13.Rc1[/font] then:

[font color="darkorange"]13...Ng6 14.c5 Nxc5 15.b4 Na6[/font] then:

If [font color="darkorange"]16.Nb5 Bd7 17.Nxa7[/font] then:

If [font color="darkorange"]17...h5?![/font] then:

If [font color="darkorange"]18.a4 Rf7[/font] then:

If [font color="darkorange"]19.Nb5?![/font] then:

If [font color="darkorange"]19...Bh6?! 20.Rc4 Rg7[/font] then:

If [font color="darkorange"]21.Kh1 Nf8 22.g3 fxg3 23.Bxg3 Ng6 24.Nd3[/font] then:

If [font color="darkorange"]24...Nf4 25.Bxf4 gxf4 26.Rg1[/font] then:

[font color="darkorange"]26...Rxg1+ 27.Qxg1+ Kh7 28.Qc1 Qg5 29.Qf1[/font] draw (Krivoshey-Golubov, Corres, 1999).
[font color="darkpink"]26...Bg5 27.Bf1 Bh4 28.Rxg7+ Kxg7[/font] is equal (S. Atalik-Timoshchenko, Romanian ChT, Timis de Sus, 1998).

If [font color="purple"]24...Kh7 25.Rg1[/font] then:

[font color="purple"]25...Rf7?! 26.Bf2! Be8 27.Nc3 Nb8 28.Qc2[/font] gives White a fair advantage in space (Yerminisky-Kindermann, FIDE Knock Out, Groningen, 1997).
[font color="hotpink"]25...Nf4 26.Nxf4 gxf4 27.Bf2 Rxg1+ 28.Qxg1 Bh3[/font] remains equal.

[font color="burgundy"]21.Nd3 Qf6 22.h3 Nh4 23.Qe1 Rf8 24.Nxc7[/font] is equal.

[font color="daprkink"]19...h4! 20.h3 Nxb4 21.Qb3 Na6 22.Nd3 Bf8 23.Qc4[/font] gives Black an extra pawn and White more space.

[font color="darkorchid"]19.Rb1! Qe8 20.Nb5 Qe7 21.Nc3 Nh4 22.Nd3[/font] gives White activity on the queenside.

If [font color="purple"]18.Bxa6 bxa6[/font] then:

If [font color="purple"]19.Qc2 Rf7 20.Qxc7[/font] then:

[font color="purple"]20...Qf8 21.Qb7 Bb5 22.Qxa8 Qxa8 23.Rc8+ Qxc8 24.Nxc8 Bf8[/font] gives Black a slight edge as he is about to go up an exchange (Kesten-Jorczik, Op, Bad Wörishofen, 2008).
[font color="darkpink"]20...Qxc7 21.Rxc7 g4 22.Nc6 Bf6 23.fxg4 hxg4 24.Nd3 Bd8 25.Nxd8[/font] wins the exchange to go with White's extra pawn (Leotard-Lexa, Corres (?), 2004).

[font color="hotpink"]19.Qd3 g4 20.Kh1 g3 21.Bg1 Qh4 22.Qxa6[/font] gives White a passed pawn, an attack on a backward pawn and a comfortable advantage in space (Gejendra-Vishnu, Commonwealth Ch, Nigpur, 2008).

[font color="#FFACDC"]17...Rf7 18.Bxa6 bxa6 19.Qc2 Be8 20.Qe2 h5 21.Qxa6[/font] remains equal (D. Gurevich-Becerra Rivero, Op, Las Vegas, 2007).

If [font color="purple"]16.Nd3[/font] then:

If [font color="purple"]16...Rf7 17.Nb5[/font] then:

If [font color="purple"]17...Bd7 18.a4 h5 19.Nxa7 Bf8 20.Nb5 Rg7[/font] then:

[font color="purple"]21.Be1 c6 22.Nc3 Nc7 23.Nf2 Kh8 24.a5 Rb8 25.h3[/font] gives White the advantage in space, mostly localized on the queenside (Peralta-Inarkiev, World Cup, Khanty-Mansiysk, 2007).
If [font color="hotpink"]21.Rc4?![/font] then:

[font color="hotpink"]21...Nh8?![/font] then:

[font color="hotpink"]22.g4?! hxg4![/font] (Black has equalized) [font color="hotpink"]23.fxg4 Rh7 24.Qc2 Qf6 25.Kh1 Be7 26.Bg1 Bd8 27.Nc3[/font] draw (Zugrav-Rohde, Corres, 2002).
[font color="darkpink"]22.h3 Nf7 23.Rc2 c6 24.dxc6 bxc6 25.Nc3[/font] gives White a comfortable advantage in space

[font color="burgundy"]21...Nh4 22.Be1 g4 23.fxg4 hxg4 24.g3 Nf3+[/font] is equal.

If [font color="hotpink"]17...b6 18.Be1 h5 19.Nf2 Bf6[/font] then:

[font color="hotpink"]20.h3 Bb7 21.Rc2 Qd7 22.Qd3 Bd8 23.Bd2[/font] gives White a small advantage in space (Topalov-Radjabov, IT, Nanjing, 2009).
[font color="darkpink"]20.a3 Qd7 21.Rc3 Bd8 22.Qc2 Nb8 23.a4[/font] gives White a small advantage in space (Nielsen-Livatsky, Bundesliga 0708, Germany, 2007).

If [font color="hotpink"]16...h5 17.Nb5 Bd7 18.a4 Bh6 19.Rc3[/font] then:

If [font color="hotpink"]19...b6 20.Be1 Rf7 21.Nf2[/font] then:

If [font color="hotpink"]21...Nh4 22.Nxd6 cxd6 23.Bxa6 Qe8 24.Qe2 g4 25.fxg4[/font] gives White a fair edge in space aginst Black's stronger pawns (Piket-Kasparov, IT, Linares, 1997).
If [font color="darkpink"]21...Bc8 22.Rc4 Nh4 23.h3 Qf6[/font] then:

[font color="darkpink"]24.Qc2?! g4! 25.hxg4 hxg4 26.Nxd6 gxf3 27.Nxf7[/font] is equal (Bonatti-Monacell, Corres, 2000).
[font color="burgundy"]24.Qb3! Bd7 25.Rc2 Bf8 26.Na3 Bc8 27.Nd3[/font] gives White a comfortable advantage in space.

[font color="darkpink"]19...Rf7 20.Nxa7 Rg7 21.Nb5 Nf8 22.h3 Nh7 23.Be1[/font] gives White a comfortable advantage in space (Korchnoi-Cvitan, Euro ChT, Pula, 1997).

If [font color="purple"]a) 13...Rf6 14.Nd3 Rh6 15.c5[/font] then:

[font color="purple"]15...Qe8 16.Nb5 Qh5 17.h4 Ng6 18.g4 fxg3 19.Bxg3[/font] gives White a substantial advantage in space (Krush-Dembo, OlW, Khanty-Mansiysk, 2010).
If [font color="hotpink"]15...a6[/font] then:

If [font color="hotpink"]16.c6 bxc6 17.dxc6[/font] then:

If [font color="hotpink"]17...Nf8 18.Nb4 Qe8 19.Kh1 Ne6 20.Ncd5[/font] then:

[font color="hotpink"]20...Ng6 21.Rc3 Nh4 22.Nc2 Kh8 23.b4 Bf8 24.Qe1[/font] gives White a strong advaantage in space with good diagonals for the Bishops (Grabliauskas-Zickus, Euro Club Cup, Fügen, 2006).
[font color="burgundy"]20...Nxd5 21.Nxd5 Kh8 22.b4 Qf7 23.Qd3 Nd4 24.Bd1 Be6 25.Re1[/font] is equal (Rogovski-Radjabov, IT, Alushta, 2001).

[font color="darkpink"]17...Nxc6 18.Nxf4 Nd4 19.Nfd5 Nf8 20.Bc4 Kh8 21.Ne2[/font] gives White a better center, but Black maintains his share of it Bluvshtein-Inarkiev, Aeroflot Op, Moscow, 2004).

[font color="#FF8080"]16.cxd6 cxd6 17.a4 Qe8 18.Be1 Nf6 19.Nf2 Rg6 20.a5[/font] gives White more freedom (Dambacher-Ponomariov, Euro Club Cup, Kallithea, 2008).

If [font color="purple"]b) 13...a6 14.Nd3[/font] then:

If [font color="purple"]14...b6 15.b4 Rf6 16.c5 Rh6 17.cxd6 cxd6[/font] then:

If [font color="purple"]18.b5 Qe8 19.Kh1[/font] then:

[font color="purple"]19...a5 20.Na4 Rb8 21.Ndb2 Nf6 22.Nc4 Nh5 23.Qe1[/font] gives White a tremendous advantage with a plan to capture both of Black' queenside pawns (Krush-Zenyuk, US ChW, St. Louis, 2011).
[font color="darkpink"]19...Nf6 20.bxa6 Qh5 21.Bg1 Qg6 22.Nf2 Nh5 23.Nh3[/font] is equal (Berkvens-Inarkiev, Ruro Club Cup. Antalya, 2007).

[font color="burgundy"]18.g4 fxg3 19.hxg3 Ng6 20.Kg2 Nf6 21.Rh1 Rxh1 22.Qxh1[/font] gives White the advantage in space (Khalifman-Inarkiev, World Cup, Khanty-Mansiysk, 2005).

[font color="hotpink"]14...Rf6 15.c5 Rh6[/font] transposes into [font color="hotpink"]Grabliauskas-Zickus[/font] and its branches, above.

[font color="magenta"](Bayonet Attack)[/font] If [font color="magenta"]9.b4 Nh5 10.c5[/font] then:

If [font color="magenta"]10...Nf4 11.Bxf4 exf4 12.Rc1[/font] then:

If [font color="magenta"]12...h6[/font] then:

[font color="magenta"]13.Nd4 a6 14.h3 Kh8 15.Qd2 Ng8 16.Rfd1[/font] gives White a significant advantage in space and a slight initiative (Ivanchuk-Grischuk, Grand Prix, Nalchik, 2009).
If [font color="darkorange"]13.h3 g5[/font] then:

If [font color="darkorange"]14.a4 Ng6 15.a5 Re8 16.Nd2[/font] then:

If [font color="darkorange"]16...f5 17.cxd6 cxd6[/font] then:

[font color="darkorange"]18.exf5?! Bxf5! 19.Nb5 Bb2[/font] is equal (Sosonko-van Wely, Dutch Ch, Amsterdam, 1995).
White wins the exchange after [font color="burgundy"]18.Bh5! Qf6 19.Nb5 fxe4 20.Nc7.[/font]

[font color="hotpink"]16...Ne5 17.cxd6 cxd6 18.Nb5 Re7 19.Qc2 a6 20.Nd4[/font] gives White command of the c-file and a fair advandage in space (Diesen-Day, Op, Lone Pine, California, 1977).

[font color="purple"]14.Nd4 Ng6 15.Bg4 Bxg4 16.hxg4 Bxd4 17.Qxd4[/font] gives White a small advantage in space (Larsen-Uhlmann, IT, Zagreb, 1965).

If [font color="darkorange"]12...a5 13.cxd6 cxd6 14.Nb5[/font] then:

If [font color="darkorange"]14...axb4 15.Qb3 Bg4 16.Rc7[/font] then:

If [font color="darkorange"]16...Nc8 17.Rxb7 Qa5[/font] then:

If [font color="darkorange"]18.Bc4?![/font] then:

If [font color="darkorange"]18...Nb6 19.Rc7 Nxc4 20.Qxc4 Rfc8 21.Rc6 Rxc6[/font] then:

If [font color="darkorange"]22.Qxc6 Qxa2 23.Nxd6[/font] then:

[font color="darkorange"]23...Qa7?! 24.Nb5 Qa6 25.Nfd4 Bxd4 26.Qxa6 Bxf2+[/font] gives Black an extra pawn (Grivas-Murey, IT, Tel Aviv, 1991).
[font color="burgundy"]23...Bxf3! 24.gxf3 b3 25.Qb7 Rf8 26.Nc8 b2[/font] puts Black on the doorstep of victory.

[font color="darkpink"]22.dxc6?[/font] then Black wins after [font color="darkpink"]22...Be6 23.Qd3 Qa6 24.c7 Bd7 25.Rd1 Bxb5.[/font]

[font color="darkorchid"]18...Bxf3! 19.gxf3 Nb6 20.Rb1 Nxc4 21.Qxc4 Be5[/font] is equal (Grivas-Cooper, Ol, Novi Sad, 1990).

[font color="#B93B8F"]18.Bd3! Qa6 19.Rc7 Qa5 20.Rb7 Qa6 etc.[/font] draws.

[font color="hotpink"]16...Re8 17.Rfc1 Bc3 18.Rxb7 Bc8 19.Ra7 Rxa7 20.Nxa7[/font] gives White a small advantage in space (Bönsch-Uhlmann, IT, Potsdam, 1985).

[font color="purple"]14...Bg4 15.Rc7 axb4 16.Qd2 Bxf3 17.Bxf3 Be5 18.Rxb7[/font] is equal (Kamsky-Kasparov, Rpd Grand Prix, New York, 1994).

If [font color="darkorange"]10...f5[/font] then:

If [font color="darkorange"]11.Ng5[/font] then:

If [font color="darkorange"]11...Nf4 12.Bc4 h6[/font] then:

If [font color="darkorange"]13.Ne6 Bxe6 14.dxe6 fxe4[/font] then:

If [font color="darkorange"]15.Nd5?![/font] then:

[font color="darkorange"]15...Nfxd5! 16.Bxd5 c6 17.cxd6 Nxd5 18.e7 Nxe7 19.dxe7 Qxe7 20.Qg4[/font] gives Black a fair advantage in space (Karlsson-Olsson, Swedish Ch, Linkoping, 2001).
[font color="burgundy"]15...Kh7?! 16.Be3! Nxe6 17.Nxc7 Qxc7 18.Qxd6 Qxd6 19.cxd6 Nd4 20.dxe7 Rfe8 21.Bd5 Nc2 22.Bc5 Nxa1 23.Rxa1 b6 24.Bxa8 bxc5[/font] draw (Reifer-Jansa, Czechoslovakian Ch, Kosice, 1961).

[font color="darkpink"]15.Rb1! d5 16.Bxf4 dxc4 17.Be3 Nf5[/font] remains equal.

[font color="#C08040"]13.Nf3 fxe4 14.Nd2 Nf5 15.Ncxe4 Qh4 16.Re1 Nd4[/font] is equal (Jakobetz-Tiemann, Corres, 2001).

If [font color="purple"]11...Nf6 12.f3[/font] then:

[font color="purple"]12...Kh8?! 13.Be3![/font] (White has a significant advantage in space) [font color="purple"]13...Bh6 14.Nf7+ Rxf7 15.Bxh6[/font] then:

If [font color="purple"]15... f4 16.Rc1 Neg8 17.Bg5[/font] then:

If [font color="purple"]17...Rg7 18.g4 h5 19.h3 Rh7 20.Kg2 Bd7 21.Rh1[/font] continues to give White a sigficant advantage in space, but he needs to find a place to break through (Bacrot-Radjabov, FIDE Knock Out, Tripoli, 2004).
[font color="#FF8080"]15...a5 16.a3 Kg8 17.Qe1 axb4 18.axb4 Rxa1 19.Qxa1[/font] continues to give White a sigficant advantage.

[font color="darkpink"]17...h6 18.Bh4 g5 19.Bf2 Rg7 20.Qc2 g4 21.Bh4[/font] gives White more freedom and a more space (Najdorf-Cuartas Bedoya, IT, Buenos Aires, 1973).

If [font color="hotpink"]12...h6! 13.Ne6 Bxe6 14.dxe6[/font] then:

[font color="hotpink"]14...d5 15.exd5 Nfxd5 16.Nxd5 Qxd5 17.Qxd5 Nxd5[/font] is equal (Dub-Dobos, 1st Saturday July, Budapest, 2001).
[font color="darkpink"]14...dxc5?! 15.Qxd8 Rfxd8 16.bxc5 Bf8 17.Be3 f4 18.Bf2[/font] gives White a fair advantage in space.

If [font color="purple"]11.Re1 Nf6 12.Bg5 h6 13.Bxf6 Bxf6 14.Rc1[/font] gives White a slight advantage in space (Kramnik-Topalov, IT, Novgorod, 1996).

7...exd4

If [font color="red"]7...Nbd7 8.0-0 c6[/font] then:

If [font color="red"]9.d5 c5 10.Ne1 Ne8[/font] then:

If [font color="red"]11.Nd3 f5 12.f4[/font] then:

If [font color="red"]12...b6 13.Qd2 Qe7 14.Bf3[/font] then:

[font color="red"]14...g5 15.fxg5 f4 16.Bf2 Qxg5 17.b4 Ndf6[/font] gives White a stronger center and a safer King (Batchuluun-Li Shilong, Asian Ch, Manila, 2007).
[font color="burgundy"]14...Nef6 15.Rae1 Ng4 16.Bxg4 fxg4 17.f5 gxf5 18.exf5[/font] gives White a comfortable advantage in space (Ekeberg-Bjarnason, Nordic Ch, Bergen, Norway, 1996).

[font color="darkpink"]12...g5 13.fxe5 Nxe5 14.Nxe5 Bxe5 15.exf5 Bxf5[/font] gives White a small advantage in space (Tal-Dr. Nunn, TM, London, 1984).

If [font color="darkred"]11.g4 f5 12.gxf5 gxf5 13.exf5[/font] then:

If [font color="darkred"]13...Nb6[/font] then:

If [font color="darkred"]14.Nf3 Bxf5 15.Ng5 Nf6[/font] then:

[font color="darkred"]16.Kh1 Qe7 17.Rg1 Kh8 18.Rg3 e4 19.Qd2[/font] gives White a better center, slightly stronger pawns and a small advantage in space (Shen Yang-Li Shilong, Asian Ch, Manila, 2007).
[font color="purple"]16.a4 Qe7 17.a5 Nbd7 18.a6 b6 19.Nb5[/font] gives Black slightly stronger pawns against White's comfortable advantage in space (Wells-Areshchenko, IT, Coventry, 2005).

If [font color="magenta"]14.Kh1 Bxf5[/font] then:

If [font color="magenta"]15.Rg1 Kh8 16.Nf3 e4 17.Ng5[/font] then:

[font color="magenta"]17...Bxc3 18.bxc3 Qe7 19.Rg3 Nf6 20.Qd2 Nbd7 21.Rag1[/font] gives White more space and freedom against Black's slightly better pawns (Ionov-Kuzmin, Russian Ch Qual, St. Petersburg, 2004).
[font color="hotpink"]17...Qe7 18.Qd2 Nf6 19.Rg3 Nfd7 20.Rag1 Rg8 21.b3[/font] gives White better command of the g-file and a small advantage in space (Karavade-Areschenko, Op, Dubai, 2005).

[font color="darkorange"]15.Nf3 e4 16.Ng5 Qe7 17.Rg1 Nf6 18.Qd2[/font] gives White a better center and a small advantage in space (Sielecki-Movsesian, Op, Groningen, 1997).

[font color="darkorchid"]13...Ndf6 14.Bd3 e4 15.Nxe4 Nxe4 16.Bxe4 Qh4 17.Qc2[/font] gives White two extra pawns (Avrukh-Plakalovic, IT, Euro Club Cup, Plovdiv, 2010).

If [font color="darkred"]9.Qc2 Ng4 10.Bg5 f6[/font] then:

If [font color="darkred"]11.Bd2 f5[/font] (I guess we can call this the Uhlmann-Knaak variation; they had a 14-year long theoretical discussion about this position covering 13 games) [font color="darkred"]12.exf5[/font] then:

If [font color="darkred"]12...gxf5 13.dxe5 dxe5 14.Ng5 Ndf6[/font] then:

If [font color="darkred"]15.Rad1 Qe7[/font] then:

[font color="darkred"]16.c5 Kh8 17.b4 Nh6 18.Bc4 f4 19.Rfe1[/font] gives White better King safety and a significant advantage in space (Uhlmann-Knaak, IT, Halle, 1981).
[font color="burgundy"]16.Qc1 Bd7 17.b4 Kh8 18.f3 Nh6 19.c5[/font] gives White a small advantage in space (Uhlmann-Knaak, IT, Szirak, 1985).

[font color="darkpink"]15.Kh1 Qe8 16.f3 Nh6 17.Rae1 Nh5 18.Bd3[/font] gives White a small advantage in space (Uhlmann-Knaak, East German Ch, Nordhausen, 1986).

If [font color="magenta"]12...exd4 13.Nxd4 Bxd4 14.Bxg4[/font] then:

If [font color="magenta"]14...Ne5 15.Bh3[/font] then:

If [font color="magenta"]15...Bxf5 16.Bxf5 Rxf5 17.Ne2[/font] then:

[font color="magenta"]17...Qh4 18.Nxd4 Qxd4 19.Bc3 Qxc4 20.Rad1 Raf8 21.Rxd6 Nf3+ 22.gxf3 Rg5+[/font] White resigns one move ahead of mate (Szabo-Ivkov, Euro ChT, Bath, 1973).
[font color="hotpink"]17...Bb6 18.Ng3 Rf7 19.Ne4 d5 20.Ng5 Rf5 21.c5[/font] is equal (Sterud-Anton, Corres, 1984).

[font color="purple"]15...Qh4 16.Ne2 Bb6 17.Bf4 Bxf5 18.Bxf5 Rxf5[/font] gives Black a lot more activity and a significant advantage in space (Möhring-Plachetka, IT, Trnava, 1979).

[font color="darkorange"]14...Qh4?! 15.Be2! Nc5 16.g3 Qf6 17.fxg6 Bf5 18.Qc1[/font] gives White the advantage in space.

If [font color="magenta"]11.Bh4 Nh6[/font] then:

[font color="magenta"]12.dxe5 dxe5 13.b4 Nf7 14.Nd2 Qe7 15.c5 Re8 16.Nb3[/font] gives White the advantage in space (Kotronias-Skalkotas, Op, Athens, 1988).
[font color="darkorange"]12.Rad1 Qe7 13.b4 Nf7 14.dxe5 dxe5 15.c5 Re8 16.Nd2 Nf8 17.f3 Ne6 18.Nb3[/font] gives White the advantage in space (W. Schmidt-Ingo, Op, Dresden, 1993).

8.Nxd4 Re8 9.f3 c6 10.Bf2

If [font color="red"]10.Qd2 d5 11.exd5 cxd5 12.0-0[/font] then:

If [font color="red"]12...Nc6[/font] then:

If [font color="red"]13.Rad1 Nxd4 14.Bxd4 dxc4 15.Bxc4[/font] then:

If [font color="red"]15...Be6 16.Bb5 Rf8 17.Qf2 Qa5 18.Qh4[/font] then:

[font color="red"]18...Nh5 19.Bxg7 Kxg7 20.Qd4+ Kg8 21.b4[/font] draw (Alexandrova-Dolzhikova, Ukrainian ChW, Kramatorsk, 2001).
[font color="burgundy"]18...a6 19.Ba4 b5 20.Bb3 Bxb3 21.axb3 Rfd8 22.Kh1[/font] is equal and shortly agreed drawn (Tal-Yurtaev, TT, Moscow, 1983).

If [font color="darkred"]15...a6 16.Rfe1[/font] then:

[font color="darkorange"]16...Bf5 17.g4 Rxe1+ 18.Qxe1 Qc7 19.Bxf6 Bxf6 20.Nd5[/font] gives White a strong initiative with Black's Queen and both Bishops under attack (Polugaevsky-M. Gurevich, IT 9091, Reggio Emilia, 1991).
[font color="magenta"]16...Bd7 17.Qf4 Rxe1+ 18.Rxe1 Rc8 19.Bb3 Bc6 20.h4[/font] gives White a small advantage in space (Su. Polgar-Wojtkiewicz, Rubinstein Mem, Polanc Zdroj, 1991).

If [font color="darkred"]13.c5 Rxe3 14.Qxe3 Qf8[/font] then:

If [font color="darkred"]15.Nxc6 bxc6[/font] then:

[font color="darkred"]16.Kh1 Rb8 17.Na4 Rb4 18.b3 Be6 19.Nb2 Nh5 20.Nd3 Rh4 21.Qf2 Qe7 22.g4 Bd4 23.Qxd4 Rxh2+ 24.Kxh2 Qh4+[/font] draw (Karpov-Kasparov, World Ch Match, New York, 1990).
[font color="darkorange"]16.Na4 Bf5 17.Rfe1 d4 18.Qa3 Nd5 19.Bd3 Be6[/font] gives White an overproteced c-pawn and a slight advantage in space; Black has a central passer, which White has blockaded (Hillarp Persson-Spassov, Op, Salou, Spain, 2005).

[font color="magenta"]15.Ncb5 Qxc5 16.Rac1 Qb6 17.Qf2 Bd7 18.Rfd1 Re8[/font] is equal (Kasparov-Gelfand, IT, Linares, 1992).

If [font color="darkred"]12...dxc4 13.Rad1 a6 14.Bxc4[/font] then:

If [font color="darkred"]14...b5 15.Bb3 Bb7[/font] then:

If [font color="darkred"]16.a4[/font] then:

If [font color="darkred"]16...bxa4 17.Bxa4 Nbd7 18.Nb3[/font] then:

[font color="darkred"]18...Qe7 19.Rfe1 Qb4 20.Qf2 Re5 21.Nc1 Re7 22.Rd4[/font] gives White a small advantage in space and the initiative (Reshevsky-Glicoric, IT, Los Angeles, 1963).
If [font color="magenta"]18...Qc8 19.Na5 Re5 20.b4 Bf8[/font] then:

[font color="magenta"]21.Bf4 Bxb4 22.Bxe5 Nxe5 23.Nxb7 Bxc3 24.Qe3[/font] gives White the initiative and a small advantage in space (Reshevsky-Ju. Bobolchán, IT, Mar del Plata, 1966).
If [font color="darkorange"]21.Bxd7 Nxd7 22.Bf4 Bxb4 23.Nxb7 Qxb7[/font] then:

[font color="darkorange"]24.Qxd7 Qxd7 25.Rxd7 Bxc3 26.Bxe5 Bxe5 27.Rfd1[/font] gives White the exchange and a Rook on the seventh rank; Black has a passed pawn.
[font color="purple"]24.Bxe5 Nxe5 25.Qd4 Qa7 26.Na4 a5 27.Qxa7 Rxa7 28.Rd5[/font] gives Black the exchange, a blockade on Black's passer and the initiative.

If [font color="magenta"]16...b4 17.Ne4 Qe7[/font] then:

[font color="magenta"]18.Nc2?! Bxe4 19.fxe4 Nc6 20.Bg5 Rad8 21.Bd5[/font] is equal (Reshevsky-Puri, Op, Philadelphia, 1986).
If [font color="darkorange"]18.Bg5![/font] then:

[font color="darkorange"]18...Nbd7?! 19.Nf5! gxf5 20.Nd6[/font] then:

[font color="darkorange"]20...Reb8? 21.Rfe1 Qf8 22.Nxf7 Bd5[/font] then:

[font color="darkorange"]23.Bxd5?! Qc5+ 24.Kf1 Qxd5 25.Qxd5 Nxd5 26.Rxd5[/font] gives White an extra pawn, the initiative and more space (Wade-Horton, British Ch, Rhyl, 1969).
[font color="burgundy"]23.Nh6+ Kh8 24.Bxd5 Qc5+ 25.Kf1 Qxd5 26.Qxd5 Nxd5 27.Rxd5[/font] leaves White a pawn up with an overwhlming position.

[font color="hotpink"]20...Ne5 21.f4 Ne4 22.Bxe7 Nxd2 23.Nxe8 Nxf1 24.Nxg7[/font] gives White command of the d-file, stronger pawns and the Bishop pair.

[font color="purple"]18...Bxe4 19.fxe4 Nbd7 20.Bd5 Rac8 21.Kh1[/font] gives White the Bishop and a small advantage in space, but also an isolated pawn.

If [font color="magenta"]16.Bh6 Bxh6 17.Qxh6 Nbd7 18.Ne4[/font] then:

[font color="magenta"]18...Qb6 19.Ng5 Re7 20.Kh1 Nf8 21.Rd2 Bd5[/font] is equal (van Wely-Bacerra Rivero, Capablanca Mem, Havana, 1995).
[font color="darkorange"]18...Bxe4 19.fxe4 Qe7 20.Qg5 Qxe4 21.Nxb5 axb5 22.Bxf7+[/font] is equal (Savon-Geller, Soviet Ch, Moscow, 1969).

If [font color="magenta"]14...Nbd7[/font] then:

[font color="magenta"]15.a4 Ne5 16.Ba2 Bd7 17.Bh6 Qb6 18.Bxg7 Kxg7[/font] is equal (Wade-Penrose, British Ch, Rhyl, 1969).
[font color="darkorange"]15.Rfe1 b5 16.Bb3 Bb7 17.Bf2 Rxe1+ 18.Qxe1[/font] gives White a small advantage in space (Halkias-Kantsler, Rpd IT, Panormo, Greece, 2001).

If [font color="blue"]10.0-0 d5 11.cxd5[/font] then:

If [font color="blue"]11...Nxd5 12.Nxd5 cxd5[/font] then:

If [font color="blue"]13.Qb3 Nc6 14.Rad1[/font] then:

If [font color="blue"]14...Nxd4 15.Bxd4 Bxd4+ 16.Rxd4 Qf6[/font] then:

If [font color="blue"]17.Rd2 Qf4 18.Qxd5[/font] then:

If [font color="blue"]18...Qe3+ 19.Rf2 Be6[/font] then:

[font color="blue"]20.Qd3 Qb6 21.Qb5 Qe3 22.Qd3 Qb6 23.Qb5 Qe3 24.Rd3 Qc1+ 25.Rf1[/font] gives White a fair advantage in space (Gustafsson-Kotronias, Euro Club Cup. Kemer, 2007).
[font color="#80ACDC"]20.Qd4 Qxd4 21.Rxd4 Bxa2 22.Rd7 Rab8 23.Bb5 Re5[/font] gives White a slight advantage in space (Yevseev-Kotronias, IT 0506, Reggio Emilia, 2005).

[font color="steelblue"]18...Be6 19.Qd4 Rad8 20.Qxd8 Qe3+ 21.Rf2 Rxd8 22.Rxd8+[/font] gives White an extra pawn (Hess-Naroditsky, Op, Groningen, 2011).

[font color="slateblue"]17.Qxd5 Be6 18.e5 Bxd5 19.exf6 Rxe2 20.Rxd5 Rxb2[/font] draw (Lima-Kasparov, SX, Rio de Janeiro, 1996).

[font color="darkcyan"]14...Qa5 15.Nb5 dxe4 16.Nd6 Re7 17.Bc4 Ne5 18.Rd5[/font] gives White a small advantage in space (Dolmatov-Yurtaev, Soviet Ch 1st League, Sverdlovsk, 1984).

[font color="dodgerblue"]13.Rc1 Nc6 14.Nxc6 bxc6 15.Rxc6 Bb7 16.Rc1 dxe4 17.Qxd8 Raxd8[/font] is equal (Gustafsson-Maze, Euro Ch, Aix-les-Bains, 2011).

If [font color="darkblue"]11...cxd5 12.Qb3[/font] then:

If [font color="darkblue"]12...dxe4 13.Bc4 Rf8 14.Rad1 Qe7[/font] then:

If [font color="darkblue"]15.fxe4 Nc6 16.Nd5 Nxd5 17.Nxc6 bxc6 18.exd5[/font] gives White a small advantage in space (Nei-Stein, Soviet Ch, Tbilisi, 1967).
[font color="darkcyan"]15.Nxe4 Nxe4 16.fxe4 Nd7 17.h3 Ne5 18.Bd5[/font] gives White a better center and a fair advantage in space (Tisdall-Mortensen, IT, Aarhus, 1983).

[font color="dodgerblue"]12...Nc6 13.Rad1 Qe7 14.Nxd5 Nxd5 15.Qxd5 Nxd4 16.Bxd4[/font] gives White a fair advantage in space (R. Bytnr-Gligoric, Vidmar Mem, Ljubljana, 1969).

10...d5

If [font color="red"]10...Nbd7 11.0-0[/font] then:

If [font color="red"]11...d5 12.exd5 cxd5 13.Ndb5 dxc4[/font] then:

[font color="red"]14.Nd6 Rf8?! 15.Bxc4 Ne5 16.Bb3 Be6 17.Bxe6 fxe6 18.Nxb7[/font] (Sasikiran-Wajih, Indian Ch, New Delhi, 2001).
If [font color="darkred"]14.Bxc4[/font] then:

[font color="darkred"]14...a6? 15.Nd6! Rf8 16.Re1 b5 17.Bb3 Rb8 18.Qe2[/font] gives White an overwhelming advantage in space (Kosic-Vojnivic, Yugoslav ChT, Herceg Novi, 2001).
[font color="magenta"]14...Ne5 15.Qxd8 Rxd8 16.Bb3 Bf5 17.Bxa7[/font] gives White an extra pawn.

[font color="darkorchid"]11...Nh5 12.Re1 Nf4 13.Bf1 Ne5 14.Qd2 g5 15.Be3[/font] [gives White a small advantage in space; Black's Knights look splendid, but neioter of them can move forward.]().

11.exd5 cxd5 12.0-0 Nc6 13.c5 Nh5

If [font color="red"]13...Re5[/font] then:

If [font color="red"]14.Bb5 Bd7 15.Qa4 Rc8[/font] then:

[font color="red"]16.Rfe1 Rxe1+ 17.Rxe1 Nxd4 18.Bxd4 Bc6 19.Qd1 Qa5[/font] is equal (Onischuk-Bacrot, IT, Poikovsky, 2011).
[font color="magenta"]16.Rad1 Nh5 17.g3 a6 18.Bxc6 Bxc6 19.Nxc6[/font] gives White a small adavtage in space; his pressure in the center is very effective (Shulman-Feller, IT, Texas Tech U, 2011).

[font color="darkred"]14.Re1 Bd7 15.Qb3 Nh5 16.Qxb7 Nxd4 17.Bxd4[/font] gives White an extra pawn (S. Volkov-Gallgher, Euro Ch, Aix-les0Bains, 2011).

14.Qd2 Be5 15.g3 Ng7

[font color="red"]15...Bh3 16.Rfe1 Nf6 17.Ncb5 h5 18.b4 a6 19.Nd6[/font] gives White a slight advantage after the ensuing exchanges starting with 19...Bxd5! (El Debs- Hollemaert, IT, São Paulo. 2008).

16.Rfd1 Bf5!? (N)

If [font color="red"]16...Be6 17.Nxe6[/font] then:

If [font color="red"]17...fxe6 18.f4 Bf6 19.Nb5[/font] then:

If [font color="red"]19...Rf8[/font] then:

[font color="red"]20.Rab1 a6 21.Nd6 Ne8 22.Nxe8 Qxe8 23.b4 Rd8[/font] gives White the advantage on the queenside (Sasikiran-Thipsay, Asian Ch, Calcutta, 2001).
[font color="burgundy"]20.Nd6 Rb8 21.Rac1 b6 22.Bb5 bxc5 23.Bxc6 Rxb2 24.Qe1[/font] (Onischuk-Kasimdzhanov, Grand Prix, Moscow, 2002).

If [font color="darkred"]19...Be7 20.Rac1[/font] then:

[font color="darkred"]20...a6 21.Nd4 Bf6 22.Nf3 Qa5 23.Qxa5 Nxa5 24.b4[/font] gives White better pawns and the initiative (Khalifman-Akopian, FIDE Knock Out, Las Vegas, 1999).
[font color="magenta"]20...Rf8 21.Rc2 Qd7 22.a3 Rf7 23.Qe1 Nf5 24.Bg4[/font] gives White preessure in the center and better pawns.

[font color="darkorchid"]17...Nxe6 18.Qxd5 Bxc3 19.bxc3 Qf6 20.Kf1 Qxc3[/font] is equal (Markus-And. Volokitin, Bosnian League, Neum, 2005).

17.Bb5

The game is equal.
[font color="red"]17.Ndb5! d4 18.Bxd4 Nxd4 19.Nxd4 Qe7 20.f4[/font] is also equal.

17...Bd7?!

This inaccuracy gives White the early advantage.
[font color="red"]17...Bxd4! 18.Bxd4 Ne6 19.Bxc6 bxc6 20.Re1[/font] remains equal.

[center]BLACK: Andrey Vovk[/center]

[center][/center]

[center]WHITE: Wang Yue[/center][center]Position after 17...Bf5d7[/center]

18.Nb3!

White preserves his Knight, which is now defending the pawn at c5. He now has a fair advantage with stronger pawns (Black's isolated pawn is a target) and more space.

18...Ne7?!

Black cuts the communication from the Queen to the Bishop, making the Bishop a less effective bulwark in the center.
If [font color="red"]18...Qf6 19.f4 Bxc3 20.Qxc3 Qxc3 21.bxc3[/font] then:

[font color="red"]21...Be6 22.Nd4 Rac8 23.Nxe6 fxe6 24.c4 Rcd8 25.a4[/font] continues to give White a fair advantage in space.
[font color="darkred"]21...a6!? 22.Rxd5! Be6 23.Bxc6! bxc6 24.Rd6 Rac8 25.Na5[/font] ties up Black's pieces defending the c-pawn.

19.Bxd7!?

White misses an opportunity to take a greater advantage.
If [font color="red"]19.Bd4! Bxb5[/font] then:

If [font color="red"]20.Bxe5! Bc4 21.Bxg7 Kxg7 22.Ne4[/font] then:

If [font color="red"]22...Nf5 23.Qc3+ f6 24.g4[/font] then:

[font color="red"]24...Qe7 25.gxf5 Bxb3 26.Nxf6 Qxf6 27.axb3 Re5 28.fxg6[/font] leaves White with an extra pawn.
[font color="burgundy"]24...Nh4?! 25.Nd6! Bxb3 26.Qxb3 Qc7 27.Kf1 h5 28.Re1[/font] gives White more freedom and space; Black's Knight at h4 cannot move.

[font color="darkpink"]22...dxe4??[/font] drops the Queen to [font color="darkpink"]23.Qc3+!.[/font]

If [font color="darkred"]20.Nxb5!?[/font] then:

If [font color="darkred"]20...Nef5! 21.Rac1 Nxd4 22.N3xd4[/font] then:

[font color="darkred"]22...a6 23.Nc3 Rc8 24.b4 b6 25.Nce2[/font] gives White a slight advantage in that he will be able to maintain the blockade after material is reduced.
[font color="darkorange"]22...Ne6?! 23.Nxe6! fxe6 24.Qb4 a6 25.Nd6 a5 26.Qxb7[/font] gives White an extra pawn and more space.

[font color="magenta"]20...Bxd4+ 21.N3xd4 Nef5 22.Rac1 Nxd4 23.Nxd4[/font] gives White a small advantage with the effective blockade on Black's passed but isolated d-pawn and more space.

19...Qxd7?!

Black misses a chance to improve his fortunes. Most masters will prefer to impose a forcing move between a routine capture, and Black either missed one here or misjudged its strength.
Better is [font color="red"]19...Bxc3! 20.Qxc3 Qxd7[/font] when:

[font color="red"]21.Nd4 Rac8 22.Rd2 b6 23.b4 bxc5 24.bxc5[/font] gives White a small advantage in space.
[font color="darkred"]21.Rd2 Ne6 22.Qf6 Rad8 23.Re1 Nc6 24.Red1[/font] gives White a small advantage in space.

20.Nxd5!

After the exchanges on d5, White emerges with a fair advantage.
If [font color="red"]20.Bd4?! Bxd4+ 21.Nxd4 Rad8[/font] then:

If [font color="red"]22.Rac1[/font] then:

[font color="red"]22...Nc6 23.Ndb5 d4 24.Ne4 Re6 25.Nbd6[/font] is equal.
[font color="burgundy"]22...Ne6 23.Nxe6 Qxe6 24.Re1 Qf6 25.Qf2[/font] gives White only a small advantage in space; Black's d-pawn is mobile.

If [font color="darkred"]22.Ndb5 Qc6 23.Qf2[/font] then:

[font color="darkred"]23...Ne6 24.Nxa7 Qxc5 25.Qxc5 Nxc5 26.Nab5[/font] gives White a fair advantage in space.
[font color="magenta"]23...b6?! 24.cxb6 axb6 25.Nd4 Qb7 26.Rd3[/font] gives White a fair advantage in space.

20...Nxd5 21.Qxd5 Qxd5 22.Rxd5

White has the most active Rook on the board.

22...Bxb2 23.Rb1 Bf6 24.Nd2 Re7?!

Black should be more concerned about the increasingly dangerous c-pawn.
If [font color="red"]24...b6 25.Ne4 Be7[/font] then:

[font color="red"]26.Rd2 Red8 27.Re2 f5 28.cxb6 axb6 29.Nc3[/font] gibves White the initiative.
[font color="darkred"]26.c6!? Ne6 27.Rd7 Kf8 28.Rc1 Red8 29.Rb7[/font] gives White a small advantage with the advanced passer.

[center]BLACK: Andrey Vovk[/center]

[center][/center]

[center]WHITE: Wang Yue[/center][center]Position after 24...Re8e7[/center]

25.Ne4!

White seizes the initiative and a substantial advantage in space.

25...Ne8 26.Rbd1

[font color="red"]26.g4 h6 27.Nxf6+ Nxf6 28.Rd2 Kg7 29.Kg2[/font] cleartly gives White more freedom.

26...Kf8

If [font color="red"]26...Rc8?! 27.g4![/font] then:

[font color="red"]27...h6 28.Rd7 Rc7 29.Nxf6+ Nxf6 30.Rxe7 Rxe7 31.Rd8+[/font] leaves White with a Rook marauding Black's back rank.
If [font color="darkred"]27...Be5?[/font] then:

If [font color="darkred"]28.Rd8! Rxd8 29.Rxd8 h6 30.f4[/font] then:

If [font color="darkred"]30...Bxf4 31.Nf6+ Kf8 32.c6!! bxc6 33.Nxe8[/font] then:

[font color="darkred"]33...Re5 34.Nc7+ Ke7 35.Re8+ Kd6 36.Rxe5 Kxe5 37.Na6[/font] leaves White with a piece for two pawns.
[font color="purple"]33...Rxe8[/font] loses to [font color="purple"]34.Bc5+!.[/font]

[font color="darkorange"]30...Bc7 31.Nf6+ Kf8 32.Ra8 Re6 33.Nd5 Ba5 34.Rxa7[/font] gives White an extra pawn and soon wins a second.

[font color="magenta"]28.Nd6?! Rb8! 29.Re1 f6 30.Nc4[/font] continues to give White a fair advantage in space, but nothing more.

27.Rd7 Rc8 28.g4 Be5?

Black plays an inexplicable blunder. Almost anything is better.
If [font color="red"]28...h5 29.gxh5 gxh5 30.R7d5 Be5 31.Nd6 Rcc7 32.Nc4[/font] wins the h-pawn, but Black's position is still defensable..

[center]BLACK: Andrey Vovk[/center]

[center][/center]

[center]WHITE: Wang Yue[/center][center]Position after 28...Bf6e5[/center]

29.c6!

White wins the a-pawn.

29...b6

If [font color="red"]29...Rxc6 30.Bc5! Rxc5[/font] then after [font color="red"]31.Nxc5 b6 32.Rxe7 Kxe7 33.Rd7+ Kf6 34.Ne4+[/font] the a-pawn falls.
[font color="darkred"]30...Bd6 31.Bxd6 Rxd6 32.R1xd6 Nxd6 33.Rxd6[/font] gives White an extra piece.

If [font color="blue"]29...bxc6[/font] then the a-pawn falls after [font color="blue"]30.Bc5 Nd6 31.R1xd6 Rxd7 32.Rxd7+ Kg8 33.Re7.[/font]

30.Ng5 Rc7 31.Nxh7+ Kg7

[font color="red"]31...Kg8[/font] (avoiding the variations in the note to Black's 33rd move) then:

[font color="red"]32.Ng5! Nf6 33.Rxe7 Rxe7 34.Bd4 Bxd4+ 35.Rxd4[/font] gives White a powerful passer.
[font color="darkred"]32.Rxe7? Rxe7 33.Ng5 Rc7 34.Rd7 Rxc6 35.Nxf7[/font] leaves White a pawn up, but Black has a fighting chance now.

32.Rxe7! Rxe7 33.Rd7 Bd6

If [font color="red"]33...Re6 34.Ng5[/font] then:

[font color="red"]34...Rf6[/font] then White wins easily after [font color="red"]35.Re7 Rxc6 36.Rxf7+ Kg8 37.Re7.[/font]
If [font color="darkred"]34...Rxc6 35.Rxf7+[/font] then:

[font color="darkred"]35...Kh8 36.Rf8+ Kg7 37.Rxe8 Bf6 38.Ne6+ Kf7 39.Nd8+[/font] leaves White with an extra piece and more pawns.
If [font color="magenta"]35...Kg8[/font] then White wins after [font color="magenta"]36.Re7 Rc1+ 37.Kg2 Bf6 38.Rxe8+ Kg7 39.Ne4.[/font]

34.Ng5 Bb4

[font color="red"]34...f6 35.Ne4 Ba3 36.Bg3 Kf7 37.c7 Nxc7 38.Rxc7[/font] leaves White a piece to the good.

35.Bd4+ f6 36.Ne6+ Kf7

[font color="red"]36...Kg8 37.c7 Nxc7 38.Rxe7 Bxe7 39.Nxc7[/font] leaves White a piece to the good.

37.c7 Nxc7 38.Rxe7+ 1-0

If [font color="red"]38...Bxe7[/font] then [font color="red"]39.Nxc7[/font] leaves White a piece to the good.
Andrey Bogdanovich resigns.

Jack Rabbit

(45,984 posts)

21. Shyam - Edouard, Round 8

Reply to Jack Rabbit (Reply #11)

Wed Feb 29, 2012, 12:07 AM

Feb 2012

International Master Sunder Shyam of India finished among the leaders for the second year in a row at Hastings.

[center][/center]

[center]There is no photo of Sunder Shyam available with an internet-friendly copyright[/center]
[font size="1"]Photo by [link:www.pdphoto.org/ Jon Sullivan] from [link:www.public-domain-photos.com/animals/rabbit-4.htm public-domain-photos.com (Public Domain)
[/font]

Sunder Shyam - Roamin Edouard
http://www.chessgames.com/perl/chessgame?gid=1653050
87th International Chess Congress, Round 8
Hastings, 4 January 2012

Open Sicilian Game: Najdorf Defense

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Qc7!?

This brings the game into the category of "Unusual Sixth Moves for Black." For the more usual 6...e5 and 6...e6, see Dzhumaev-Ghaem Maghami, Op, New Delhi, 2010.

7.h3

This is also rarely played.
If [font color="red"]7.Be2 e6 8.0-0 Nc6 9.a4 Be7 10.f4 0-0 11.Kh1 Re8[/font] transposes into the notes to Black's eighth move in the game Hou Yifan-Ljubojevic, TM, Amsterdam, 2009.
If [font color="blue"]7.f3 e6 8.Qd2 Nc6 9.0-0-0 Be7 10.g4[/font] then:

If [font color="blue"]10...0-0 11.g5 Nd7 12.h4[/font] then:

If [font color="blue"]12...Nxd4 13.Bxd4 b5 14.Kb1[/font] then:

If [font color="blue"]14...b4 15.Na4 Bb7[/font] then:

If [font color="blue"]16.b3 Bc6 17.Nb2 a5 18.h5 Ne5[/font] then:

[font color="blue"]19.Be2 f5 20.gxf6 Bxf6 21.Nc4 d5 22.Nb6 Rad8 23.exd5 Bxd5 24.Qe3[/font] is equal (Leko-Svidler, IT, Linares, 2006).
[font color="darkcyan"]19.Qe3 a4 20.Nc4 axb3[/font] draw (Kurmann-Cvitan, Zurich, 2004).

If [font color="darkblue"]16.Qxb4 Bc6 17.Nc3 Rfb8 18.Qc4 Ne5 19.Qe2[/font] then:

[font color="darkblue"]19...Bb5 20.Nxb5 axb5 21.c3 Nc4 22.b3 Qa5 23.Rh2 e5 24.Be3 Na3+ 25.Kb2 b4[/font] is equal (Iordachescu-Gelfand, IT, Bermuda, 2004).
[font color="dodgerblue"]19...Qa5 20.f4 Ng6 21.Qf3 e5 22.Bf2 Qb4 23.b3 Nxf4 24.Be1 Qc5 25.Bg3 a5 26.Bxf4 exf4 27.Nd5[/font] is equal (Anand-Akopian, IT A, Wijk aan Zee, 2004).

If [font color="darkblue"]14...Rb8 15.h5 b4 16.Ne2 Ne5[/font] then:

[font color="darkblue"]17.f4 Nc4 18.Qd3 e5 19.Nc1 Bg4 20.Qxc4 Qxc4 21.Bxc4 Bxd1 22.Rxd1 exd4 23.Nb3 g6 24.Nxd4[/font] gives White more spacer and the initiative for the exchange (Tiviakov-van Wely, IT A, Wijk aan Zee, 1994).
[font color="dodgerblue"]17.Ng1 f5 18.gxf6 Bxf6 19.h6 g6 20.b3 Qe7 21.f4 Ng4 22.Bc4 Bb7 23.Qe2 Bxd4 24.Rxd4[/font] gives White a comfortable lead in space (Aronian-Navara, Morso, 2002).

If [font color="darkblue"]12...b5 13.g6[/font] then:

[font color="darkblue"]13...Nf6 14.gxh7+ Kxh7 15.Nxc6 Qxc6 16.Bd3 Kh8 17.Rdg1[/font] gives White a winning advantage and he soon breaks through on the kingside (Adams-Sheldpn, British Ch, Hove, 1997).
If [font color="dodgerblue"]13...hxg6[/font] then White wins soon after [font color="dodgerblue"]14.h5 Nxd4 15.Bxd4 Ne5 16.h6 Bf6 17.hxg7 Bxg7 18.f4.[/font]

If [font color="darkblue"]10...b5 11.Nxc6 Qxc6[/font] then:

If [font color="darkblue"]12.Ne2 Bb7 13.g5 Nd7[/font] then:

If [font color="darkblue"]14.h4 Qc7 15.Nd4 Ne5[/font] then:

[font color="darkblue"]16.Bf4 Nc4 17.Bxc4 Qxc4 18.Nb3 Rc8 19.Kb1[/font] White wins the d-pawn (Vasquez-Fedorov, Op, Esbjerg Denmark, 2005).
[font color="slateblue"]16.h5 Rc8 17.Rh2 d5 18.Kb1 dxe4 19.Bf4 Nc4 20.Bxc4 Qxc4[/font] gives Black two extra pawns and more space (Simack-Navara, Op, Olomouc, 1999).

[font color="darkcyan"]14.Nd4 Qc7 15.h4 Ne5 16.Kb1 Rc8 17.Qg2[/font] gives White a better center and a little more space (Nepali-López, Ol, Khanty-Mansiysk ,2010).

[font color="dodgerblue"]12.h4 Bb7 13.Kb1 Nd7 14.Ne2 Ne5 15.Nd4[/font] gives White a fair advantage in space (Ivanchuk-J. Polgar, Sicilian theme trmt, Buenos Aires, 1994).

7...b5?! (N)

The game is out of the book already.
[font color="red"]7...g6 8.g3 Bg7 9.g4 h6 10.Bg2 Nc6[/font] then:

If [font color="red"]11.b3?! Nxd4![/font] then:

If [font color="red"]12.Qxd4 Be6[/font] then:

[font color="red"]13.0-0 0-0 14.e5 dxe5 15.Qc5 Qxc5 16.Bxc5 Rac8[/font] gives Black an overwhelming asdvantage (Gorbunov-Kozlov, Op, Tula, Russia, 2004).
[font color="darkorange"]13.Rd1[/font] drops a pawn to [font color="darkorange"]13...0-0 14.Qd3 Rac8 15.Nd5 Bxd5 16.exd5 Qxc2.[/font]

[font color="magenta"]12.Bxd4?[/font] loses to [font color="magenta"]12...e5! 13.Bxe5 dxe5.[/font]

[font color="darkred"]11.Qd2! Bd7 12.0-0-0 Ne5 13.b3 Rc8 14.Nd5[/font] gives White a small advantage in space.

8.Nd5

White has a comfortable advantage in space.

8...Nxd5 9.exd5 Bb7

Black threatens to win a pawn.

10.c4 bxc4 11.Qa4+ Qd7 12.Qxc4

White has saved his d-pawn, but his center is weak. Black, on the other hand, has no place to put his Knight.

12...g6 13.Be2 h5?

Black's position is already hopeless.
If [font color="red"]13...Bg7[/font] then:

[font color="red"]14.Bg4 Qd8 15.Rc1 0-0 16.0-0 Nd7 17.Nc6[/font] gives White more freedom and a huge anvantage in space; Black can afford no error.
[font color="darkred"]14.Qb3 0-0 15.Rc1 Bxd4 16.Bxd4 e5 17.Bb6[/font] leaves Black badly cramped.

[center]BLACK: Edouard Roamain[/center]

[center][/center]

[center]WHITE: Sunder Shyam[/center]
[center]Position after 13...h7h5[/center]

14.Bd1!

White now threatens 15.Ba4!.

14...Qd8

Black finally prepares to develop his Knight.

15.Ba4+ Nd7

But the Knight has no choice to to develop into a self-pin.

16.Ne6

If [font color="red"]16.Nc6 Qc7 17.Rc1[/font] then:

[font color="red"]17...Bg7 18.Ne5 Qxc4 19.Bxd7+ Kf8 20.Nxc4[/font] leaves White a Knight to the good.
[font color="darkred"]17...Rc8 18.Qe4 Bxc6 19.Rxc6 Qb7 20.Rb6 Qc7 21.Rxa6[/font] leaves White a pawn to the good in a much more active position.

16...Rc8

If [font color="red"]16...fxe6[/font] then White wins after [font color="red"]17.dxe6 Qa5+ 18.Bd2 Qe5+ 19.Kd1 Bg7 20.exd7+.[/font]

17.Qb4 fxe6 18.Bb6!

White must win material.

18...a5 19.Qxa5 Rc5 20.Bxd8 Rxa5 21.Bxa5 1-0

White is a Rook to the good.
[font color="red"]21...Bxd5 22.Rc1 Bxg2[/font] then:

[font color="red"]23.Rg1 Bxh3 24.Rc8+ Kf7 25.Bxd7[/font] gives White a Rook for two pawns with Black's King on the run.
[font color="darkred"]23.Rh2 Bd5 24.Rc8+ Kf7 25.Bxd7 Bg7 26.Rxh8[/font] gives White a Rook for a pawn, but with less activity.

M. Edouard resigns.

Jack Rabbit

(45,984 posts)

12. 41st Rilton Cup, Stockholm

Reply to Jack Rabbit (Reply #1)

Mon Feb 27, 2012, 03:59 PM

Feb 2012

[center][/center]

[center]Stockholm[/center]
[font size="1"]Photo by Condor Patagónico in Wikipedia http://en.wikipedia.org/wiki/File:Stockholm_Port.jpg (Public Domain)
[/font]

Jack Rabbit

(45,984 posts)

15. Shimanov - Rozanthalis, Round 8

Reply to Jack Rabbit (Reply #12)

Mon Feb 27, 2012, 04:07 PM

Feb 2012

Aleksander Shimanov, a young Russian GM, finished behind his veteran compatriot, Sergey Volkov, in last year's Rilton, but won the event this year.

[center]

[/center]

[center]Aleksandr Shimanov (right) palying blitz against Anastasia Bodnaruk[/center][font size="1"]Posted to YouTube by Sergey Sorokhtin
[/font]

Aleksandr Shimanov - Eduardas Rozentalis
Rilton Cup, Round 8
Stockholm, 4 January 2012

Open Queen's Gambit: Catalan Opening

1.d4 Nf6 2.Nf3 e6 3.g3 d5 4.c4 Be7 5.Bg2 0-0 6.0-0

If [font color="red"]6.Qc2[/font] then:

If [font color="red"]6...c6 7.0-0 Nbd7[/font] then:

If [font color="red"]8.Nbd2 b6 9.e4 Bb7[/font] then:

If [font color="red"]10.e5 Ne8 11.cxd5[/font] then:

If [font color="red"]11...cxd5 12.Re1[/font] then:

If [font color="red"]12...Rc8 13.Qa4[/font] then:

If [font color="red"]13...Bc6[/font] then:

If [font color="red"]14.Qb3 b5 15.Bf1[/font] then:

If [font color="red"]15...Qb6 16.Bd3 b4 17.Nf1 h6[/font] then:

[font color="red"]18.Bb1 Bb5 19.Ne3 f5 20.Ng2 Rf7 21.h4[/font] gives White a good grip on the kingside fark squares (Kozul-Kovacevic, Croatian Ch, Vukovar, 2005).
[font color="burgundy"]18.Bf4 Bb5 19.Bb1 f5 20.exf6 Nexf6 21.N1d2 a5[/font] is equal (Izoria-Nadera, Op, Dubai, 2004).

[font color="darkpink"]15...b4 16.Ba6 Rb8 17.Bd3 Bb5 18.Bb1 Rc8 19.Nf1[/font] is equal (Avrukh-Al Timani, Op, Bajada de la Virgen, Spain, 2005).

[font color="darkorchid"]14.Qd1 Bb5 15.Nf1 Nb8 16.h4 Nc6 17.a3 Na5[/font] is equal (Gunina-Pogonina, Russian ChW, Moscow, 2011).

If [font color="darkred"]13...a5[/font] then:

If [font color="darkred"]14.Nf1 Ba6 15.Qd1[/font] then:

If [font color="darkred"]15...Nb8 16.h4[/font] then:

[font color="darkred"]16...Nc6 17.a3 Bb5 18.Bf4 a4 19.Ne3 Na5[/font] is equal (Milchev-Nikolov, Bulgarian Ch, Kyustendil, 2010).
[font color="purple"]16...Bb4!? 17.Bd2 Qe7?! 18.a3 Bxd2 19.Qxd2 Nc7 20.Ne3[/font] gives White the advantage in space (Iljushin-Asrian, World Jr Ch, Yerevan, 2000).

[font color="darkorange"]15...b5 16.h4 Nb6 17.Bf4 Nc4 18.Rb1 a4 19.N1h2 a3[/font] gives Black a slight advantage (Sandipan-Nezad, Op, Gibralrar, 2009).

[font color="magenta"]14.Bf1 Bc6 15.Qd1 Nc7 16.Bd3 Bb5 17.Bb1 Re8[/font] gives White a very slight advantage in space (Stefanova-Pelletier, Op, Athens, 2006).

If [font color="darkred"]12...Ba6 13.Nf1 Rc8 14.Qd1[/font] then:

If [font color="darkred"]14...Nb8 15.h4 Nc6 16.Bg5[/font] then:

[font color="darkred"]16...Bxg5 17.hxg5 Ne7 18.Ne3 Qd7 19.Qd2 Nf5[/font] draw (Filippov-Khenkin, Euro Club Cup, Fügen, Austria, 2006).
[font color="darkorange"]16...Na5 17.Ne3 Nc7 18.Rc1 h6 19.Bxe7 Qxe7 20.Qd2[/font] is equal (C.-A. Foisor-Javakhishvili, Euro ChW, Dresden, 2007).

[font color="magenta"]14...Nc7 15.h4 h6 16.h5 Nb8 17.Ne3 Nc6 18.Ng4[/font] is equal (Filippov-Frolyanov, Russian ChT, Sochi, 2005).

If [font color="darkred"]11...exd5[/font] then:

[font color="darkred"]12.Re1 Nc7 13.Nf1 Ne6 14.Ne3 g6 15.Bh3[/font] gives White a small advantage in space (Gordon-Gormally, British Ch, Canterbury, 2010).
[font color="magenta"]12.Nb1 Nc7 13.Nc3 Ne6 14.Be3 f5 15.exf6 Bxf6 16.Rad1[/font] gives White a small advantage in space (Pettersen-Nezad, Op, Gibraltar, 2010).

If [font color="darkred"]10.Rd1 Rc8 11.b3[/font] then:

If [font color="darkred"]11...c5 12.exd5 exd5[/font] then:

[font color="darkred"]13.dxc5 Bxc5 14.Qf5 g6 15.Qg5 Ne4 16.Nxe4 dxe4[/font] is equal (Zhou Jianchao-Grachev, Aeroflot Op, Moscow, 2008).

[font color="burgundy"]13.Qf5 Re8 14.Bb2 g6 15.Qh3 Bf8 16.dxc5 Nxc5[/font] is equal (Ghaem Maghami-Orr, Mindsports Rpd, Beijing, 2010).
If [font color="magenta"]11...Qc7 12.Bb2 Rfd8 13.Rac1 Qb8[/font] then:

[font color="magenta"]14.e5 Ne8 15.cxd5 cxd5 16.Qd3[/font] gives White a slight advantage in space (Szabo-Rossetto, IT, Asunción, Paraguay, 1960).
If [font color="darkorange"]14.Ne1 Qa8 15.Nd3 dxe4 16.Nxe4[/font] then:

If [font color="darkorange"]16...c5 17.Nxf6+ Bxf6 18.Bxb7 Qxb7 19.dxc5[/font] then:

[font color="darkorange"]19...bxc5 20.Bxf6 gxf6 21.Qe2[/font] gives White stronger pawns and a safer King (Najdorf-Rossetto, IT, Buenos Aires, 1970).
[font color="purple"]19...Bxb2 20.Qxb2 Nxc5 21.Nxc5 bxc5 22.Rd2[/font] gives White a small advantage wioth stronger pawns.

[font color="hotpink"]16...Nxe4 17.Bxe4 Nf6 18.Ne5 Nxe4 19.Qxe4 c5[/font] is equal

If [font color="darkred"]8.b3 b6 9.Rd1[/font] then:

If [font color="darkred"]9...Ba6 10.Bf4 Rc8 11.Nc3 Qe8 12.e4 dxc4[/font] then:

If [font color="darkred"]13.Nd2 e5 14.dxe5 Ng4[/font] then:

If [font color="darkred"]15.Nxc4 Bxc4 16.bxc4 Bc5[/font] then:

If [font color="darkred"]17.Rd2 18.Rd1 Bc2 19.Rdc1[/font] draws by repetition (Vidit-Sjugirov, World Jr Ch, Chennai, 2011).
[font color="burgundy"]17.Rf1 Ndxe5 18.h3 Nf6 19.Nd1 Rd8 20.Be3 Qe7[/font] gives Black a comfortable advantage in space (Le Thanh Tu-Javakhishvili, World ChTW, Ekaterinburg, 2007).

[font color="darkpink"]15.Bh3 Ndxe5 16.Nxc4 Bxc4 17.Bxe5 Be6 18.Bxg4 Bxg4[/font] gives Black a slight advabntage in space (Sethuraman-Narayanan, World Jr Ch, Chennai, 2011).

If [font color="magenta"]13.bxc4 Bxc4 14.Nd2 Ba6 15.Qa4 Bd3[/font] then:

If [font color="magenta"]16.Ndb1 Bxb1 17.Raxb1 a5 18.Qb3 b5 19.e5 a4 20.Qb2[/font] is equal (Tkachiev-Gelfand, World Cup, Shenyang, 2000).
[font color="hotpink"]16...b5 17.Qxa7 Bxb1 18.Raxb1 b4 19.Ne2 Ra8 20.Qc7[/font] gives White a better center, but Black is about to establish his Rook at a2 (Grischuk-Ponomariov, World Cup, Khanty Mansiysk, 2005).
If [font color="darkorange"]16.Nb3 Bc2 17.Rdc1[/font] then:

If [font color="darkorange"]17...Bd3 Ndxe5 18.h3 Nf6 19.Na4 Bb4 20.Rdd1[/font] gives White a fair advantage in space (Zhukova-Arabidze, Euro ChW, Rijeka, 2010).
[font color="purple"]17...Bxb3!? 18.axb3 e5 19.dxe5 Ng4 20.Bh3[/font] gives White a slight advantage (Wang Hao-Jakovenko, TM, Ningbo, 2008).

If [font color="magenta"]9...Bb7 10.Nc3 Rc8 11.e4 dxe4 12.Nxe4[/font] then:

If [font color="magenta"]12...c5 13.Nxf6+ Bxf6 14.Ng5 Bxg5 15.Bxb7 Rc7[/font] then:

If [font color="magenta"]16.Be4 f5[/font] then:

If [font color="magenta"]17.Bg2 cxd4 18.Bxg5 Qxg5 19.Rxd4 e5[/font] then:

[font color="magenta"]20.f4 Qf6 21.fxe5 Nxe5 22.Rad1 Ng4 23.Qd2[/font] gives White a slight adveantage with the remote pawn majority and power in the d-file (S. Ernst-Al Timimi, Ol, Bled, 2002).
[font color="burgundy"]20.Rd5 Qe7 21.Rad1 Nf6 22.Rd6 e4 23.Qd2 h6[/font] gives Black equality thans to his advanced central pawns limiting the scope of White's Bishop (Hryhorenko-Kieu Thien Kim Le, Mindsports Rpd, Beijing, 2008).

[font color="darkpink"]17.d5 fxe4 18.dxe6 Bf6 19.Qxe4 Bxa1 20.e7 Qc8[/font] is equal after the forced exchange on f8 (Rogers-Godena, Ol, Minila, 1992).

[font color="darkorchid"]16.dxc5 bxc5 17.Bg2 Bf6 18.Rb1 Bd4 19.b4[/font] gives White a small advantage in space (Dedijer-Khieu Thien Kim Le, OlW, Dresden, 2008).

If [font color="darkorange"]12...Nxe4[/font] (from a statistical point of view, this exchange is suspect) [font color="darkorange"]13.Qxe4[/font] then:

If [font color="darkorange"]13...Nf6 14.Qc2[/font] then:

If [font color="darkorange"]14...Qc7 15.Bf4 Bd6[/font] then:

If [font color="darkorange"]16.Bxd6 Qxd6 17.c5[/font] then:

If [font color="darkorange"]17...Qc7 18.b4[/font] then:

[font color="darkorange"]18...Rcd8 19.Ne5 Nd5 20.Rab1 b5 21.Be4 h6 22.Qd2[/font] gives White a fair advantage in space (Andonovski-Ra. Byrne, Euro Club Cup, Rogaska Slatina Slovakia, 2011).
[font color="darkpink"]18...Nd5 19.a3 f6 20.Re1 Rce8 21.Re4 Bc8 22.Bh3[/font] gives White a small advantage in space (Kosinen-Zamit, Op, Glyfada, Greece, 2001).

If [font color="purple"]17...Qe7[/font] then:

[font color="purple"]18.Ne5 Nd5 19.Be4 h6 20.Rac1 Rfd8 21.Bh7+ Kh8 22.Bg6 f5 23.Bxf5[/font] Black resigns (Ksieski-Horther, TT 0001, Bavaria, 2001).
[font color="hotpink"]18.h4 Rfd8 19.b4 Nd7 20.a4 f6 21.a5 bxc5 22.a6[/font] gives Black a powerful advantage as the Bishop must either be lost or entombed on a8 (Sulava-Spinelli, Op, Imperia, Italy, 2001).
[font color="darkpink"]16.Be5 Nd7 17.Ng5 g6 18.Bxd6 Qxd6 19.c5[/font] gives White a strong game with the initiative and a clear advantage in space (Rayner-Kakkanas, Op 0809, Hastings, 2008).

[font color="darkorchid"]14...Bd6 15.c5 Be7 16.Bg5 h6 17.Bxf6 Bxf6 18.b4[/font] is equal (Kachiani-Tsinganova, Euro ChTW, Debrecen, 1992).

If [font color="purple"]13...Qc7 14.Bf4 Bd6 15.Bxd6 Qxd6[/font] then:

If [font color="purple"]16.c5 Qe7 17.b4 Ba6[/font] then:

[font color="purple"]18.Qc2 Nf6 19.a4 Nd5 20.Rab1 Rfd8 21.Re1[/font] gives White a fair advantage in space (de Melo-Zielinski, Corres, 2008).
[font color="darkpink"]18.Rdc1 Nf6 19.Qe1 Nd5 20.Ne5 Qb7 21.cxb6 axb6 22.a4[/font] gives White the advantage in space (Smejkal-Schultz, Op, Bad Wörishofen, 1988).

[font color="hotpink"]16.Qc2 Rfd8 17.Rac1 Qc7 18.c5 bxc5 19.dxc5[/font] gives White a fair advantage in space; Black is badly cramped (Rogoff-Bisguier, US Ch, Chicago, 1974).

If [font color="darkred"]6...c5 7.0-0 cxd4 8.Nxd4 Nc6 9.Nxc6 bxc6 10.b3[/font] then:

If [font color="darkred"]10...a5 11.Nc3 Ba6 12.Rd1[/font] then:

If [font color="darkred"]12...Qc7 13.Na4[/font] then:

If [font color="darkred"]13...Rac8[/font] then:

[font color="darkred"]14.Be3 c5 15.cxd5 Nxd5 16.Bxd5 exd5 17.Rxd5[/font] gives White a fair advantage in space thanks to his centraled Rook (Pantsulaia-Kanep, Op, Cappelle-la-Grande, 2011).
[font color="burgundy"]14.Bb2 Rfd8 15.Rac1 Qb8 16.Bc3 Bb4 17.e3[/font] gives White a small advantage in space (Razuvaev-Geller, Soviet Ch, Vilnkius, 1980).

[font color="darkpink"]13...dxc4 14.bxc4 Rab8 15.Bd2 e5 16.Rab1 Rxb1 17.Rxb1[/font] gives White a small advantage in space (Gulko-Hjartarsson, IT, Linares, 1989).

If [font color="magenta"]12...Qb6 13.Na4 Qb7[/font] then:

[font color="magenta"]14.Bd2 Rfe8 15.Rab1 Bb4 16.Bc1 Qe7 17.h3 h6[/font] is equal (Jobava-Azarov, Euro Ch, Aix-les-Bains, 2011).
[font color="darkorange"]14.Bb2 Rfd8 15.Rab1 Rac8 16.Bc3 Qc7 17.Be1 Bb4[/font] is equal (Vaganian-K. Georgiev, Euro ChT, Debrecen, 1992).

If [font color="magenta"]10...Ba6 11.Rd1 Qb6[/font] then:

If [font color="magenta"]12.Be3 Bc5 13.Bxc5 Qxc5 14.Nc3[/font] then:

If [font color="magenta"]14...dxc4 15.Ne4 Nxe4 16.Bxe4[/font] then:

[font color="magenta"]16...g6 17.Bd3 Qb4 18.Bxc4 Bxc4 19.Qxc4 Qxc4 20.bxc4[/font] is equal and drawish (Ptacnikova-Galego, Op, Reykjavik, 2006).
[font color="hotpink"]16...f5 17.Bd3 f4 18.Bxh7+ Kh8 19.g4[/font] is equal.

[font color="purple"]14...Rab8 15.Na4 Qb4 16.Nb2 Rfd8 17.Nd3 Qd6 18.Qc3[/font] gives White the threat of 19.Qa5, which Black should deal with immediately (Kerr-Bourquin, Corres, 2002).

[font color="darkorange"]12.Nc3 Rac8 13.Na4 Qa5 14.Bd2 Qc7 15.Rac1 Ba3[/font] is equal (Miroshnichenko-L. Guliev, Op, Baku, 2010).

6...dxc4

The game has transposed into an Open Catalan.

[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]Open Queen's Gambit: Catalan Opening[/center][center]Position after 6...dc4[/center]

7.Qc2

If [font color="red"]7.Ne5[/font] then:

If [font color="red"]7...Nc6 8.Nxc6 bxc6[/font] then:

If [font color="red"]9.Na3 Bxa3 10.bxa3[/font] then:

If [font color="red"]10...Nd5 11.Qa4 Nb6[/font] then:

If [font color="red"]12.Qxc6 Rb8 13.Qc5[/font] then:

If [font color="red"]13...Ba6 14.Bf4 Nd5 15.Qxa7[/font] then:

If [font color="red"]15...Rb6 16.Bxd5 Qxd5 17.Bxc7 Bb7 18.f3[/font] then:

[font color="red"]18...Ra6 19.Qc5 Rc8 20.Qxd5 Bxd5 21.Bf4[/font] draw (Ftacnik-Karajica, IT, Dortmund, 1981).
[font color="burgundy"]18...Rb2 19.Rab1 Ra8 20.e4 Qb5 21.Qb6[/font] puts an end to Black's initiative and leaves White with two extra pawns in a Rook ending (Palatnik-Razuvaev, Soviet Ch ½-final, Tbilisi, 1973).

[font color="darkpink"]15...Nxf4 16.gxf4 Qd6 17.Rfc1 Rb2 18.e3 g6 19.Rc3 Rc8 20.Bf3 Kg7 21.Rd1 Rd8[/font] draw (Sveshnikov-Balashov, Soviet Ch, Minsk, 1979).

If [font color="darkred"]13...Bb7 14.e4[/font] then:

If [font color="darkred"]14...Qd6 15.Bf4 Qxc5 16.dxc5 Na4[/font] then:

If [font color="darkred"]17.Rfc1 Ba6 18.Bf1 Nxc5 19.Bxc4 Rfc8[/font] then:

[font color="darkred"]20.Bxa6 Nxa6 21.Rc6 Rb6 22.Rac1 Kf8 23.Be3 Rxc6 24.Rxc6[/font] gives White a fair advantage with the active Rook (Raetsky-Thoma, Op, Schwaebisch Gmuend, 2001).
[font color="purple"]20.Be3 Bxc4 21.Rxc4 Nd7 22.Rac1 Rb7 23.Rb4[/font] gives White a comfortable advantage in space (Chekhov-Baikov, Moscow Ch, 1979).

[font color="darkorange"]17.Bxc7 Rbc8 18.Bd6 Rfd8 19.Rfd1 h6 20.Rd4[/font] will soon leave White two pawns up (Efimenko-Moen, Euro Club Cup, Plovdiv, 2010).

[font color="magenta"]14...Qd7 15.Be3 Bc6 16.Rfc1 Bb5 17.Rab1 a6 18.Qb4[/font] is equal (Hausner-Velimirovic, Pavlica Mem, Banja Luka, 1981).

[font color="darkorchid"]12.Qa5 Bb7 13.Rd1 Qc8 14.e4 f5 15.f3 Ba6[/font] is equal (Andreikin-Karthikeyan, World Jr Ch, Gaziantep, 2008).

If [font color="darkred"]a) 10...Ba6 11.Bxc6 Rb8 12.Qa4[/font] then:

If [font color="darkred"]12...Rb6[/font] then:

If [font color="darkred"]13.Bg2[/font] then:

If [font color="darkred"]13...Nd5 14.Qc2 f5 15.e4 fxe4 16.Bxe4[/font] then:

[font color="darkred"]16...Nf6 17.Bg2 Nd5 18.Re1! Qf6 19.Re5 h6 20.f4[/font] is equal (Palatnik-Kruppa, Soviet Ch ½-final, Kherson, 1989).
If [font color="magenta"]16...h6[/font] then:

[font color="magenta"]17.Bg2?! Qf6! 18.Be3 c3 19.Rfb1 Bc4[/font] gives Black an advanced passed pawn and the better Bishop and more active pieces in general (Vladimirov-Vaganian, GMA Qual, Moscow, 1990).
If [font color="darkorange"]a1) 17.a4 Qe7 18.a5 Rb5[/font] then:

[font color="darkorange"]19.Rd1 Rbb8 20.Re1 c6 21.Bxd5 cxd5 22.Bf4 Rb4[/font] is equal.
If [font color="purple"]19.Re1 c6[/font] then:

[font color="purple"]20.Bb2 Rb7 21.Qd2 Qd6 22.Rac1 h5[/font] is equal.
[font color="hotpink"]20.Qxc4!? Rb1! 21.Qxa6 Rxa1 22.Qxc6 Qf7[/font] gives Black a small advantage in space.

If [font color="darkorange"]a2) 17.Rd1 Qd6[/font] then:

[font color="darkorange"]18.a4 c3 19.a5 Rc6 20.Rb1 Rc4 21.a3 Nf6[/font] is equal.
[font color="purple"]18.f4?! c3! 19.Rb1 Rxb1 20.Qxb1 Qc6 21.Qc2 Qc4[/font] gives Black pressure on the queenside such that Black cannot move his Rook.

[font color="burgundy"]13...Qc8 14.Bd2 Rd8 15.Bb4 c3 16.Rfc1 Bxe2 17.Bc5[/font] is equal (Ribli-Bönsch, Ol, Thessaloniki, 1988).

If [font color="magenta"]13.Bf3 Nd5 14.Qa5 c3 15.Re1[/font] then:

[font color="magenta"]15...Qf6 16.Bxd5 exd5 17.Qxc3 Rc6 18.Qb3 Qxd4[/font] gives Black a slight advantage in space (Beliavsky-Geller, IT, Moscow, 1981).
[font color="darkorange"]15...f5 16.Bxd5 Qxd5 17.Qxc3 Rc6 18.Qb2 Rb6 19.Qc3[/font] draw (Reatsky-A. Sheider, Op, Cappelle-la-Grande, 1999).

If [font color="magenta"]12...Qc8[/font] then:

[font color="magenta"]13.Bf3 Nd7 14.Bf4 Rb6 15.Rfd1 Nf6 16.Qc2[/font] gives White a small advantage in space against Black's passed pawn (Chekhov-Zaid, Soviet Youth, Baku, 1979).
[font color="darkorange"]13.Bg5 Nd5 14.e4 Nb6 15.Qa5 Bb7 16.Qc5 Bxc6 17.Qxc6[/font] is equal (Alburt-Geller, Soviet Ch, Leningrad, 1977).

If [font color="darkred"]b) 10...Rb8 11.Qa4 Qxd4 12.Be3[/font] then:

If [font color="darkred"]12...Qb2 13.Qxc4 Nd5 14.Bxa7 Ra8[/font] then:

If [font color="darkred"]15.Bd4 Qb5 16.Qxb5 cxb5[/font] then:

[font color="darkred"]17.Bc5 Re8 18.Rfc1 c6 19.e4 Nf6 20.f3 Bb7[/font] gives White a small advantage in space (Wang Yue-Nielsen, Mindgames Rpd, Beijing, 2011).
[font color="burgundy"]17.Rfc1 Ra4 18.Bc5 Re8 19.e4 Nb6 20.Rab1[/font] gives White a small advantage in space (Ju Wenjun-Pakidze, Moscow Open, 2010).

If [font color="magenta"]15.Bc5?! Ba6![/font] then:

[font color="magenta"]16.Qh4 Rfe8 17.Rfe1 Bxe2 18.Rac1 Bd3 19.Bd4 Qb5[/font] gives Black an extra pawn (Nestor-Zavgorodniy, Op, Kharkov, 2002).
[font color="darkorange"]16.Qe4 Rfe8 17.Rfe1 Bb5 18.e3 Ra4 19.Qf3 Rc4[/font] gives Black an extra pawn (Ju Wenjun-Lkhmasuren, Asian ChW, Subic Bay, 2010).

If [font color="magenta"]12...Qe5 13.Qxc4 Qa5[/font] then:

[font color="magenta"]14.Qxc6 Bb7 15.Qc5 Qxc5 16.Bxc5 Bxg2 17.Kxg2[/font] gives White a slight initiative (Ristic-Blatny, Op, Groningen, 1988).
[font color="darkorange"]14.Bxc6 Bb7 15.Bxb7 Rxb7 16.Bc5 Rfb8 17.Rac1[/font] gives White a slight advantage (Ribli-Hertneck, Bundesliga 9596, Germany, 1995).

If [font color="darkred"]9.Bxc6 Rb8 10.Nc3 Bb7 11.Bb5[/font] then:

If [font color="darkred"]11...c5 12.dxc5 Qc7[/font] then:

If [font color="darkred"]13.Qa4 Bxc5 14.Qxc4 Rfc8 15.Qh4 Ba8 16.Bd3 Qc6[/font] gives Black a small advantage in space (Cichocki-Antonczyk, Polish ChT, Mikolajki, 1991).
[font color="burgundy"]13.Qd4[/font] draw (Smejkal-Krogius, Chigorin Mem, Sochi, 1973).

If [font color="magenta"]11...Bd5 12.b3 cxb3 13.axb3[/font] then:

If [font color="magenta"]13...Ba8 14.Bc4 c5[/font] then:

[font color="magenta"]15.Bf4 Rc8 16.dxc5 Bxc5 17.Qxd8 Rfxd8 18.Ra2 h6[/font] is equal (Smejkal-R. Byrne, IT, Amsterdam, 2979).
If [font color="darkorange"]15.dxc5 Qc7 16.Na4[/font] then:

If [font color="darkorange"]16...Bxc5?! 17.Nxc5 Qxc5 18.Be3! Qa5 19.f3[/font] gives White an active Bishop pair and the inititive (Panno-Ivkov, IT, São Paulo, 1973).
[font color="purple"]16...Rfd8 17.Qc2 Qc6 18.f3 Bxc5+ 19.Nxc5 Qxc5+ 20.Kg2[/font] gives White more freedom.

[font color="darkpink"]13...c6 14.Bc4 Bb4 15.Qd3 Bxc4 16.Qxc4 Bxc3 17.Qxc3[/font]

If [font color="darkred"]7...c5 8.dxc5[/font] then:

If [font color="darkred"]8...Qc7 9.Nxc4[/font] then:

If [font color="darkred"]9...Qxc5 10.b3 Rd8[/font] then:

If [font color="darkred"]11.Nbd2 Nc6[/font] then:

If [font color="darkred"]12.Bb2 Rb8 13.Rc1[/font] then:

If [font color="darkred"]13...Qg5 14.Qc2 Nb4 15.Nf3 Qh5 16.Qb1 Bd7 17.Nfe5[/font] gives White more activity and more space (Tashkov-Chorvat, Corres, 2000).
[font color="burgundy"]13...Qb5 14.a3 Bd7 15.b4 Be8 16.e4 h5 17.h3[/font] gives White a small advantage owing to the threat of 18.e5! (Pinter-Kallai, Hungarian ChT, 1988).

If [font color="magenta"]12.Ba3[/font] then:

[font color="magenta"]12...Qh5?! 13.Bxe7! Nxe7 14.e3 Qxd1 15.Rfxd1 Nfd5 16.Rac1[/font] gives White a fair advantage owing to a superior Bishop (Szabo-Portisch, Hungarian Ch, Budapest, 1968).
[font color="darkorange"]12...Nb4! 13.Qc1 h5 14.Bb2 h4 15.Ne4 Nxe4 16.Bxe4[/font] gives White only a small advantage in space

If [font color="magenta"]11.Qe1 Nc6 12.Ba3 Qh5 13.Bxe7 Nxe7[/font] then:

If [font color="magenta"]14.Qa5!? Qxa5 15.Nxa5[/font] then:

If [font color="magenta"]15...Nfd5[/font] then:

[font color="magenta"]16.e4 Nb4 17.Nc3 b6 18.Rfd1 Ba6 19.Nc4 Nd3[/font] gives Black a slight advantage in space (Haag-Portisch, Hungarian Ch, Budapest, 1964).
[font color="hotpink"]16.Rc1 b6 17.Nc4 Ba6 18.a4 Nc6 19.e3 Rac8[/font] is equal (Doda-Portisch, Ol, Tel Aviv, 1964).

[font color="purple"]15...Rb8 16.Nc3 b6 17.Nc6 Nxc6 18.Bxc6 Bb7[/font] is equal (V. Petrov-Eliskases, Ol, Buenos Aires, 1939).

[font color="darkorange"]14.Nc3 Rb8 15.Ne4 Nxe4 16.Bxe4 b6 17.Rd1[/font] gives White a small advantage in space.

If [font color="magenta"]9...Bxc5 10.Nc3[/font] then:

If [font color="magenta"]10...Bxf2+ 11.Rxf2 Qxc4 12.Rxf6 gxf6 13.Bh6[/font] then:

[font color="magenta"]13...Nc6? 14.e3! Rd8 15.Qh5 e5 16.Ne4 Qe6 17.Qh4[/font] Black resigns (Ivkov-Robatsch, IT, Vinkovci, 1968).
[font color="purple"]13...Nd7 14.Ne4 Qb4 15.Rc1 f5 16.Nd6 Ne5 17.Bxf8 Qb6+[/font] is equal (Psakhis-Stefansson, Canadian Op, Winnipeg, 1997).

[font color="darkorange"]10...Rd8?! 11.Bf4! Bxf2+? 12.Kxf2! e5 13.Nb5 Qe7 14.Bd2[/font] gives White an extra piece (Portisch-Matanovic, IT, Skopje, 1968).

If [font color="magenta"]8...Bxc5 9.Nc3 Qe7[/font] then:

If [font color="magenta"]10.Nxc4 Rd8[/font] then:

[font color="magenta"]11.Qe1 Nc6 12.Bg5 Bd7 13.Ne4 b5 14.Na5 Bd4[/font] gives White a winning advantage from superior piece co-ordination (Smejkal-Mititelu, IT, Luhacovice, 1971).
[font color="purple"]11.Qc2 Nc6 12.Bg5 Bd7 13.e3 h6 14.Bxf6 Qxf6[/font] (Nogueiras-Granda Zuñiga, Capablanca Mem, Havana, 1986).

[font color="darkorange"]10.Bg5 Nc6 11.Nxc6 bxc6 12.Qa4 Rb8 13.Ne4 Bd4[/font] is equal (I. Almasi-Krita, 1st Saturday April, Budapest, 2001).

7...a6 8.a4

If [font color="red"]8.Qxc4 b5 9.Qc2 Bb7[/font] then:

If [font color="red"]10.Bd2 Be4 11.Qc1[/font] then:

If [font color="red"]11...Bb7[/font] then:

If [font color="red"]12.Qc2 Be4 13.Qc1[/font] then:

If [font color="red"]13...Bb7 14.Bf4[/font] then:

If [font color="red"]14...Nd5 15.Nc3 Nxf4 16.Qxf4[/font] then:

If [font color="red"]16...Nd7 17.Rfd1 Bd6 18.Qe3 [/font] then:

If [font color="red"]18...Nb6[/font] then:

If [font color="red"]19.Ne5 Bxg2 20.Kxg2[/font] then:

[font color="red"]20...Qe7 21.Nc6 Qe8 22.Qf3 f5 23.Rac1[/font] is equal (Harika-Hou Yifan, Asian Games TTW, Guangzhou, 2010).
[font color="burgundy"]20...f5 21.Rac1 Qf6 22.f4 b4 23.Nb1 g5 24.Nd2 gxf4 25.gxf4 Nd5[/font] is equal (Ivanisevich-Iljin, Euro Ch, Plovdiv, 2008).

[font color="darkpink"]19.a4 Nxa4 20.Nxa4 bxa4 21.Rxa4 Rb8 22.b3[/font] gives White a fair advantage in space (Laznicka-Onischuk, IT, Poikovsky, 2011).

If [font color="darkred"]18...Qe7[/font] then:

If [font color="darkred"]19.Ne5 Bxg2 20.Nxd7 Qxd7 21.Kxg2[/font] then:

If [font color="darkred"]21...Qc6+ 22.Kg1 Qb6 23.Rac1 Rad8 24.Ne4 h6 25.Qc3[/font] gives White a better center and a small advantage in space (Ruck-Cvetkovic, Euro Ch, Budva, 2009).
[font color="darkorange"]21...Rae8 22.Rac1 f5 23.f4 Re7 24.Qf3 b4 25.Nb1[/font] gives White a small advantage in space (Haba-Palo, Ol, Bled, 2002).
[font color="purple"]21...f5 22.f4 b4 23.Nb1 c5 24.dxc5 Qc6+ 25.Qf3[/font] gives White a slim advantage in space (Leko-Karpov, Tal Mem Blitz, Moscow, 2009).

[font color="magenta"]19.Ne4 f5 20.Nxd6 cxd6 21.Rac1 Nf6 22.Ng5[/font] is equal (Paunovic-Senlle Caride, Op, Figueira da Foz, Portugal, 2010).

If [font color="darkred"]16...Qd6[/font] then:

If [font color="darkred"]17.Ne5 Bxg2 18.Kxg2[/font] then:

If [font color="darkred"]18...c5 19.dxc5 Qxc5 20.Ne4 Qb6 21.Rfd1 Ra7 22.Rac1 f6[/font] then:

[font color="darkred"]23.Nf3! e5 24.Qd2 Rd8 25.Qc2 Rxd1 26.Qxd1[/font] gives White a fair advantage in space (Khalifman-Karpov, Soviet Ch, Moscow, 1988).
[font color="purple"]23.Nd3?! Rd7 24.Qf3 a5 25.Nf4 Rxd1 26.Rxd1 f5[/font] is equal (K. Georgiev-Iordecescu, IT, Valjevo, Serbia, 2007).

[font color="darkorange"]18...Nd7 19.Nxd7 Qxd7 20.Rfd1 Rac8 21.Qf3 Rfd8 22.Rac1[/font] gives White a small advantage in space (Domínguez Pérez-Carlsen, Amber Blind, Nice, 2010).

If [font color="magenta"]17.Rfd1[/font] then:

[font color="magenta"]17...Nd7 18.d5 Qxf4 19.gxf4 exd5 20.Nxd5 Bxd5 21.Rxd5 Nb6[/font] is equal (Romanishin-Janighava, Soviet Ch 1st League, Simferopol, 1988).
[font color="darkorange"]17...c5 18.Qxd6 Bxd6 19.dxc5 Bxc5 20.Rac1 Be7[/font] gives White more activity as a result of better development (Kengis-Sammalvuo, Ol, Palma de Mallorca, 2004).

If [font color="darkred"]14...Bd6[/font] then:

If [font color="darkred"]15.Nbd2 Nbd7 16.Nb3 Bd5 17.Rd1[/font] then:

If [font color="darkred"]17...Qb8 18.Ne5 Bxg2 19.Kxg2[/font] then:

[font color="darkred"]19...Qb6 20.Qc6 Bxe5 21.Qxb6 cxb6 22.dxe5 Nd5 23.Rac1 Rfc8[/font] gives White a small advantage in space, but Black's Knight at d5 is a better piece than White's Bishop (Gelfand-Anand, Amber Rapid, Monte Cartlo, 2004).
[font color="burgundy"]19...Qb7+ 20.Kg1 a5 21.Bd2 Qe4 22.Bxa5 Qxe2 23.Rd2 Qe4 24.Qc2 Qd5 25.a3 Ra6[/font] draw (Fominyh-Nikitin, Russia Cup, Samara, 2002).

If [font color="magenta"]17...Qe7 18.Ne5 Bxg2 19.Kxg2[/font] then:

If [font color="magenta"]19...Nd5 20.Nc6 Nxf4+ 21.Qxf4 Qe8 22.Qf3[/font] then:

[font color="magenta"]22...f5 23.Rac1 Nf6 24.Kh1[/font] gives White a fair advantage in space (Korchnoi-Hou Yifan, IT, Paks, Hungary, 2007).
[font color="burgundy"]22...e5 23.dxe5 Nxe5 24.Nxe5 Qxe5 25.Rd2[/font] gives White a small advantage in space (Kasparov-Kramnik, World Ch Match, London, 2000).

If [font color="darkorange"]19...Bxe5!?[/font] then:

[font color="darkorange"]20.dxe5! Nd5 21.Bg5 f6 22.exf6 gxf6 23.Bd2[/font] gives White a backward Black pawn to target.
[font color="purple"]20.Bxe5 Nd5 21.e4 Nxe5 22.dxe5 Nb6 23.Nc5[/font] gives White more space and a serious pawn weakness.

If [font color="magenta"]15.Nc3 Nbd7 16.Rd1 Qb8[/font] then:

[font color="magenta"]17.Ne5 Bxg2 18.Nxd7 Nxd7 19.Kxg2 c5 20.dxc5[/font] gives White a small advantage in space (Tukmakov-Lautier, World Cup, Palma de Mallorca, 1989).
[font color="darkorange"]17.a3 c5 18.dxc5 Bxf4 19.Qxf4 Qxf4 20.gxf4 Nxc5[/font] is equal (Schandorff-Pilgaard, Danish Ch, Nyborg, 2001).

If [font color="darkred"]12.Be3[/font] then:

[font color="darkred"]12...Nd5 13.Nc3 Nd7 14.Rd1 Rc8 15.Nxd5 Bxd5 16.Ne1 c6 17.Nd3 Qb6 18.Qc3 b4 19.Qd2 a5 20.Rdc1[/font] draw (Kasparov-Karpov, World Ch Match 8485, Moscow 1984).
[font color="magenta"]12...Nbd7 13.Nbd2 Rc8 14.Nb3 Bd5 15.Rd1 c6 16.Ne1 Bxg2 17.Kxg2[/font] is equal (Haba-von Bülow, Op, Pardubice, 2000).

[font color="darkorchid"]13...Nbd7 14.Ba5 Rc8[/font] transposes into [font color="darkred"]Galdunz-Vaganian,[/font] below.

If [font color="darkred"]11...Nbd7 12.Ba5[/font] then:

[font color="darkred"]12...Rc8[/font] then:

[font color="darkred"]13.Nbd2 Ba8[/font] then:

[font color="darkred"]14.Qc2 Qe8 15.b4[/font] then:

If [font color="darkred"]15...Nd5 16.a3 f5[/font] then:

If [font color="darkred"]17.e3 Qh5 18.Rac1 Bd6 19.Qd1 Qh6 20.Qe2 N7f6[/font] then:

If [font color="darkred"]21.Rfd1 Ne7 22.Ne1 Bd5 23.Nd3[/font] is equal (Galdunz-Vaganian, Moscow, 1991).
[font color="burgundy"]21.Rfe1 Ne4 22.Nxe4 fxe4 23.Ne5 Ne7 24.a4[/font] is equal (Budnikov-D. King, Op, London, 1993).

If [font color="magenta"]17.Rae1[/font] then:

[font color="magenta"]17...Qg6 18.e4 fxe4 19.Qxe4 Rf6 20.Qxg6 Rxg6 21.Ne4[/font] gives White more activity for his minor pieces and a small advantage in space (Gelfand-Lutz, IT, Dortmund, 2002).

[font color="darkorange"]17...Qh5 18.Qb3 Rce8 19.e4 fxe4 20.Nxe4 Qg6 21.Nc5[/font] gives White more freedom and stronger pawns (Ftacnik-Ribli, Bundesliga 0405, Stuttgart, 2005).

[font color="burgundy"]15...Nb8 16.Ne5 Bxg2 17.Kxg2 Bd6 18.Rac1 Nd5 19.Nd3[/font] gives White a small advantage in space (Pelletier-Wells, Euro Ch, Plovdiv, 2008).

If [font color="magenta"]14.a3[/font] then:

If [font color="magenta"]14...Qe8 15.b4 Bd6[/font] then:

[font color="magenta"]16.Re1 Ne4 17.Nxe4 Bxe4 18.Qe3 Bd5 19.Rac1 f5 20.Ne5[/font] gives White a small advantage in space (Huzman-Wells, Euro Ch, Dresden, 2007).
[font color="purple"]16.Qc2 e5 17.dxe5 Nxe5 18.Nxe5 Bxg2 19.Kxg2 Qxe5[/font] is equal (Housieaux-Radulski, Cappelle-la-Grande, 2010).

[font color="darkorange"]14...Nb8 15.Rd1 Qe8 16.Nb3 Bd5 17.Nc5 Bxc5 18.Qxc5[/font] gives White a small advantage in space (Ivanchuk-Gelfand, Amber Blind, Monte Carlo, 2004).

If [font color="magenta"]13.Nc3 Ba8 14.a4[/font] then:

If [font color="magenta"]14...bxa4 15.Nxa4 Qe8 16.b4 Nb6 17.Nc5 Qb5[/font] then:

[font color="magenta"]18.Re1 Nc4 19.e4 Nxa5 20.Rxa5 Qxb4 21.Ra4[/font] gives White a small advantage in space (Alburt-Morovich Fernández, Op, New York, 1987).
[font color="hotpink"]18.Qc2 Bxc5[/font] draw (Smejkal-Lobron, IT 8586, Reggio Emilia, 1985).

If [font color="darkorange"]14...Rb8 15.axb5 axb5[/font] then:

[font color="darkorange"]16.b4 Bd6 17.Qc2 Qe7 18.Rab1[/font] gives White fewer pawn weaknesses and more space (Beliavsky-Vaganian. World Cup, Brussels, 1988).
[font color="purple"]16.Rd1 Bd6 17.Ne5 Bxg2 18.Kxg2[/font] is equal (Vasilevich-Mkrtchian, Euro Club Cup W, Saint Vincent, 2005).

If [font color="magenta"]12...Ra7 13.Nbd2 Bd5[/font] then:

[font color="magenta"]14.Re1 Ne4 15.Nxe4 Bxe4[/font] then:

[font color="magenta"]16.Qe3 Qa8 17.Rac1 Nb6 18.b3 b4 19.Bf1[/font] gives White a small advantage in space (Sammour Hasbun-Ippolito, USCL, Cyberspace, 2009).
If [font color="darkorange"]16.Qf4 Nf6 17.Ne5[/font] then:

[font color="darkorange"]17...Bxg2?! 18.Kxg2 Bd6 19.Rac1! Nd5 20.Qd2[/font] the White the threat of 21.Nc6!, winning material (Nakamura-Illescas Córdoba, IT, Barcelona, 2007).
If [font color="purple"]17...Qd5 18.f3 Qxd4+ 19.e3 Qd6[/font] then:

[font color="purple"]20.Red1 Bd5 21.e4 Qc5+ 22.Kh1 Ba8 23.b4[/font] gives the Black Queen no safe quarter.
[font color="hotpink"]20.fxe4?! Nh5 21.Nxf7 Nxf4 22.Nxd6 Nxg2 23.Kxg2 cxd6 24.Rac1[/font] gives White a small advantage in space.

If [font color="darkorange"]14.b4 Qa8[/font] then:

[font color="darkorange"]15.Rd1 Nb8 16.Nb3 Nc6 17.Nc5 h6 18.Qa3 Bxc5 19.dxc5 Qb7[/font] gives Black a small advantage in space (Karkanque-Dervishi, IT, Durres, Albania, 2001).
[font color="purple"]15.Qc3 Nb8 16.Nb3 Nc6 17.Rfc1 Ne4 18.Qe1 Bd6[/font] gives Black more activity and a modest advantage in space (Seewald-J. van Oosterom, Corres, 1980).

If [font color="darkred"]10.Bf4 Nc6[/font] then:

If [font color="darkred"]11.Rd1 Nb4 12.Qc1[/font] then:

If [font color="darkred"]12...Rc8 13.Nc3 Nbd5 14.Nxd5 Bxd5 15.Be3[/font] then:

If [font color="darkred"]15...Ng4 16.Ne1 Bxg2 17.Nxg2 Qd5[/font] then:

[font color="darkred"]18.f3 Nxe3 19.Nxe3 Qb7 20.Kg2 c5 21.dxc5 Bxc5[/font] gives Black a slight advantage owning to the discovewred attack set up against White's Queen (Bruzón Batista-Anand, Ol, Torino, 2006).
[font color="burgundy"]18.h3 Nxe3 19.Qxe3 c5 20.Nf4 Qf5 21.dxc5 Bxc5[/font] gives Black a slight initiative (Carlsen-Anand, Rpd Match, Mainz, 2008).

If [font color="magenta"]15...c6 16.Ne1[/font] then:

If [font color="magenta"]16...Qb6 17.Nd3 Bxg2 18.Kxg2 Nd5 19.Nf4 Nxf4+ 20.Bxf4 c5[/font] gives Black a small advantage from the discoverd attack masking on c5 (Dizdarevic-Huzman, Euro ChT, Pula, 1997).
[font color="darkorange"]16...Bxg2 17.Kxg2 Nd5 18.Nd3 Nxe3+ 19.Qxe3 Qd5+[/font] then:

[font color="darkorange"]20.f3 c5 21.dxc5 Bxc5 22.Nxc5 Qxc5 23.Qxc5 Rxc5 24.Rac1[/font] gives White a slight advantage, but the game is soon agreed drawn (Piket-Adams, Donner Mem, Amsterdam, 1994).
If [font color="purple"]20.Kg1[/font] then:

[font color="purple"]20...c5 21.dxc5 Bxc5 22.Nxc5 Qxc5 23.Qxc5 Rxc5[/font] is equal (Ftacnik-Lutz, Bundesliga 9798. Germany, 1998).
[font color="hotpink"]20...Rfd8 21.Nf4 Qd6 22.Rd3 g6 23.Rad1[/font] is equal (Haba-Lutz, Bundesliga 0203, Germany, 2002).

[font color="burgundy"]12...Qc8 13.Bg5 c5 14.Bxf6 gxf6 15.Nc3 Rd8 16.a3[/font] gives Black a slight advantage in space and White a slight initiative (Agzamov-Karpov, Soviet Ch, Moscow, 1983).

If [font color="magenta"]11.Nc3 Nb4 12.Qb1[/font] then:

If [font color="magenta"]12...c5 13.dxc5 Bxc5[/font] then:

If [font color="magenta"]14.Be5 Ng4 15.Ne4 Bxe4 16.Qxe4[/font] then:

[font color="magenta"]16...f5 17.Qf4 Nd5 18.Qd2 Qb6 19.Bd4 Rad8 20.Rac1[/font] is equal (Inkiov-Speelman, Ol, Novi Sad, 1990).
[font color="purple"]16...Nxe5 17.Nxe5 Rc8 18.Rad1 Nd5 19.Qb1 Qc7 20.Nd3[/font] is equal (E. Torre-Georgadze, IT, Hannover, 1983).

If [font color="darkorange"]14.a3 Nbd5[/font] then:

If [font color="darkorange"]15.Be5 Nxc3 16.Bxc3 Ne4 17.Ng5 Qxg5 18.Bxe4 Bxe4 19.Qxe4[/font] gives White a small advantage thanks to his centralized Queen (Turner-Gormally, Match, Hamstead, 2001).
[font color="purple"]15.Nxd5 Bxd5 16.Be5 Nd7 17.Bc3 Rc8 18.Qd3 Nb6[/font] is equal (Zaitshik-Savon, Soviet Ch, Leningrad, 1977).

[font color="hotpink"]12...Nbd5 13.Nxd5 Bxd5 14.Be5 Be4 15.Qc1[/font] is equal (Inkiov-Geller, IT, Sochi, 1983).

8...Bd7

If [font color="red"]8...Nc6 9.Qxc4[/font] then:

If [font color="red"]9...Qd5[/font] then:

If [font color="red"]10.Nbd2 Rd8 11.e3[/font] then:

If [font color="red"]11...Qxc4 12.Nxc4 Bd7[/font] then:

If [font color="red"]13.Nfe5 Nxe5 14.Nxe5 Nd5[/font] then:

[font color="red"]15.Bd2 a5 16.Rfc1 Be8 17.b3 c6 18.Nd3[/font] gives White a small advantage with more freedom (Short-Lautier, IT, Horgen1995).
[font color="burgundy"]15.Nxd7 Rxd7 16.b3 a5 17.Bb2 Bb4 18.Rac1 c6 19.Rfd1 Rad8 20.Bf3[/font] draw (Urban-Balashov, Op, Miedzybrodzie, Poland, 1991).

[font color="darkpink"]13.Bd2 Nb4 14.Nfe5 Nfd5 15.Rfc1 Be8 16.Na5[/font] gives White a fair advantage in space, but Black's Knights stand better (Panno-Gómez Baillo, IT, Buenos Aires, 1987).

[font color="darkorchid"]11...Qh5 12.e4 Bd7 13.b3 b5 14.Qc3 bxa4[/font] is equal (Korchnoi-Tal, Candidates' Match ½-final, Moscow, 2968).

If [font color="darkred"]10.Qd3 Rd8 11.Nc3[/font] then:

If [font color="darkred"]11...Qh5 12.Qc4 Bd7[/font] then:

[font color="darkred"]13.Bg5 Be8 14.e3 Rac8 15.Bxf6 Bxf6 16.Ne4 Be7[/font] is equal (Dlugy-Speelman, Op, London, 1986).
[font color="darkorange"]13.Bf4 Rac8 14.e4 Be8 15.h3 Qa5 16.Rfd1 Qb4[/font] is equal (Forsberg-Olofsson, Corres, 2002).

[font color="magenta"]11...Qa5 12.Qc4 Qb4 13.Qxb4 Nxb4 14.Bf4 Nfd5[/font] Gives White a small advatange is space (Doda-Czerniak, Ol, Nice, 1974).

If [font color="darkred"]9...Nb4[/font] then:

[font color="darkred"]10.Nc3 b5 11.Qb3 bxa4 12.Nxa4 Bb7 13.Bg5[/font] gives White a slim advantage in space (Dr. Hübner-Chandler, Bundesliga 9394, Germany, 1994).
If [font color="magenta"]10.Ne5 b5[/font] then:

[font color="magenta"]11.Qb3 bxa4 12.Rxa4 Rb8 13.Bd2 Bd7 14.Nxd7 Qxd7 15.Bc3[/font] gives White a slim advantage in space (Poldauf-Stark, Op, Berlin, 1998).
[font color="darkorange"]11.Qc3 Rb8?! 12.axb5! axb5 13.Ra7 Nbd5 14.Qb3 Qd6 15.e4[/font] (Cua-Kharisma Sukandar, Mindsports Rpd, Beijing, 2008)

9.Rd1

If [font color="red"]9.Qxc4 Bc6[/font] then:

If [font color="red"]10.Bg5[/font] then:

If [font color="red"]10...Bd5[/font] then:

If [font color="red"]11.Qc2 Be4[/font] then:

If [font color="red"]12.Qc1 h6[/font] then:

If [font color="red"]13.Bxf6 Bxf6[/font] then:

If [font color="red"]14.Nc3[/font] then:

If [font color="red"]14...Bxf3 15.Bxf3 c6 16.e3 a5 17.Rd1[/font] then:

If [font color="red"]17...Na6 18.Qc2 Nb4[/font] then:

[font color="red"]19.Qe2 Qb6 20.Ne4 Be7 21.Nd2 Rfd8 22.Nc4[/font] is equal (Wojtkiewicz-Shulman, US Ch, Stillwater, Oklahoma, 2005).
[font color="burgundy"]19.Qe4 Qe7 20.Rd2 Rad8 21.Rad1 Rd7 22.Qg4 Rfd8[/font] is equal (Beliavsky-Lutz, Euro ChT, León, Spain, 2001).

[font color="darkpink"]17...Qb6 18.Qc2 Nd7 19.Rac1 Rfd8 20.Bg2 Be7 21.Ne4[/font] gives White a slim advantage in space (Zatonskih-Zhao Xue, OlW, Torino, 2006).

If [font color="darkred"]14...Bh7 15.Rd1 c6[/font] then:

[font color="darkred"]16.Ne5 Nd7 17.Nxd7 Qxd7 18.Ne4 Bxe4 19.Bxe4[/font] draw (Ricardi-Short, Najdorf Mem, Buenos Aires, 2000).
[font color="magenta"]16.a5 Nd7 17.Ne5 Qc7 18.Nxd7 Qxd7 19.Na4 Qc7[/font] gives White a small advantage in space (Lputian-Leitão, IT, Poikovsky, 2001).

If [font color="darkred"]14.Rd1 a5[/font] then:

[font color="darkred"]15.Nbd2 Bxf3 16.Bxf3 c6 17.Nb3 Na6 18.Qc4 Qb6 19.Rac1[/font] gives White a small advantage in space (Bareev-Gelfand, Amber Blind, Monte Carlo, 2002).
[font color="magenta"]15.Nc3 Bxf3 16.Bxf3 c6 17.Ne4 Na6 18.h4 Qe7 19.h5[/font] is equal (Filippov-Khalifman, Euro Club Cup, Halkidiki, 2002).

If [font color="darkred"]13.Bf4[/font] then:

If [font color="darkred"]13...Nd5 14.Nc3 Nxf4 15.Qxf4 Bxf3 16.Bxf3 c6 17.Rfd1[/font] then:

If [font color="darkred"]17...a5[/font] then:

[font color="darkred"]18.h4 Nd7 19.Qe4[/font] draw (Khalifman-Bologan, Euro Club Cup, Panormo, 2001).
[font color="burgundy"]18.Kg2 Na6 19.Qd2 Nb4 20.e3 Qb6 21.Rac1 Rad8 22.Qe2 Rd7 23.Qc4[/font] draw (Sulava-Palac, Croatian Ch, Vukovar, 2005).

[font color="darkpink"]17...Nd7 18.a5 Rc8 19.Ra4 Qc7 20.Qc1 Rfd8 21.Qa1[/font] gives White a small advantage in space (Sulava-Arlandi, Euro Ch, Ohrid, 2001).

If [font color="magenta"]13...Nc6[/font] then:

If [font color="magenta"]14.Rd1[/font] then:

[font color="magenta"]14...Bxf3 15.Bxf3 Nxd4 16.Kg2 c5 17.e3 Nb3 18.Rxd8 Nxc1 19.Rxa8 Rxa8 20.Bxb7[/font] leaves White's pawns slightly better (Tkachiev-Adams, Rpd Match, Cannes, 2001).
[font color="purple"]14...Nd5 15.Nc3 Nxc3 16.bxc3 Na5 17.Qe3 Bc2 18.Re1 Nc4 19.Qc1[/font] gives White a small advantage in space and the initiative (Gleizerov-Tunik, Op, St. Petersburg, 2003).

[font color="darkorange"]14.Nfd2 Bh7 15.Ne4 Nd5 16.Rd1 Nxf4 17.Qxf4[/font] draw (Ftacnik-Onischuk, Euro Club Cup, Rethymnon, 2003).

If [font color="darkred"]12.Qd1 c5 13.dxc5 Bxc5[/font] then:

If [font color="darkred"]14.Qxd8 Rxd8 15.Nbd2 Bc6 16.Nb3[/font] then:

If [font color="darkred"]16...Bb4[/font] then:

If [font color="darkred"]17.Rfc1!? Nbd7 18.Bd2 Bxd2 19.Nfxd2 Bxg2 20.Kxg2[/font] then:

[font color="darkred"]20...Rdc8 21.Nc4 Rab8 22.Nca5 g5 23.Kf1 Kf8 24.Ke1[/font] draw (Savchenko-Pigusov, Euro Ch Rd 12, Ohrid, 2001).
[font color="burgundy"]20...Ne5!? 21.Nc4 Nxc4 22.Rxc4 Ne8 23.Rac1[/font] gives White a small advantage in space (Savchenko-Stefansson, Ruro Ch Rd 10, Ohrid, 2001).

[font color="darkpink"]17.Ne5 Bxg2 18.Kxg2 Nbd7 19.Nxd7 Rxd7 20.Bxf6 gxf6[/font] continues to give White a small advantage in space (Kunte-Yu Shaoteng, Asian Ch, Subic Bay, 2009).

If [font color="magenta"]16...Be7 17.Na5[/font] then:

[font color="magenta"]17...h6! 18.Nxc6 Nxc6 19.Bd2 Ne4 20.Be3 Bc5[/font] (Varilievich-N. Kosintseva, Russian ChTW, Dagomys, 2009).
[font color="darkorange"]17...Bd5!? 18.Ne5! Bxg2 19.Kxg2 Nbd7 20.Nd3[/font] gives White the initiative and a small advantage in space (Aronian-Lutz, Bundesliga 0203, Germany, 2002).

If [font color="magenta"]14.Nc3 Bc6 15.Ne5 Bxg2[/font] then:

[font color="magenta"]16.Qxd8 Rxd8 17.Kxg2 h6 18.Bxf6 gxf6 19.Ng4 f5[/font] is equal (Fridman-Zarnicki, Ol, Yerevan, 1996).
[font color="darkorange"]16.Kxg2 h6 17.Bxf6 Qxf6 18.f4 Qe7 19.Ne4 Rd8[/font] is equal (Akopian-Kramnik, TM, Moscow, 2002).

If [font color="darkred"]11.Qd3 c5 12.Nc3[/font] then:

If [font color="darkred"]12...Bc6 13.Rfd1[/font] then:

If [font color="darkred"]13...cxd4 14.Nxd4 Bxg2 15.Kxg2[/font] then:

If [font color="darkred"]15...Nbd7 16.Qf3 Qb8[/font] then:

If [font color="darkred"]17.Bf4[/font] then:

If [font color="darkred"]17...Qa7?! 18.e4![/font] then:

If [font color="darkred"]18...g6?! 19.e5! Nh5 20.Nf5!! Nxf4+ 21.gxf4[/font] then:

If [font color="darkred"]21...gxf5? 22.Rxd7![/font] then:

[font color="darkred"]22...Qc5 23.Rxb7 Bh4 24.Ne2 Rab8 25.Rc1[/font] White wins (Romanishin-Papp, Barcza Mem, Budapest, 2008).
No better is [font color="burgundy"]22...Rae8 23.Ne2 Bh4 24.Rc1 Rd8 25.Rxb7 Qa8 26.Rcc7.[/font]

Black sytays in the game longer after [font color="darkpink"]21...exf5 22.Rxd7 Bh4 23.Rxb7 Qc5 24.Nd5 Rfd8 25.Rd1.[/font]

[font color="hotpink"]18...Bb4 19.Nde2 e5 20.Be3 Bc5 21.Bg5[/font] gives White a significant advantage in space.

[font color="purple"]17...Qe8! 18.Nb3 Rc8 19.Rac1 Rc4 20.Na5 Rb4 21.b3[/font] continues to give White a small advantage in space.

[font color="darkorange"]17.Nb3 Ne5 18.Qf4 h6 19.Bxf6 Bxf6 20.Ne4[/font] gives White a small advantage in space (Kaidanov-Onischuk, US Ch, Stillwater, Oklahoma, 2007).

If [font color="magenta"]15...Qa5 16.Bxf6 Bxf6 17.Ne4[/font] then:

If [font color="magenta"]17...Bxd4 18.Qxd4 Nc6 19.Qc5[/font] then:

[font color="magenta"]19...Rac8 20.Qxa5 Nxa5[/font] then:

[font color="magenta"]21.Rac1 h6 22.h4 Rxc1 23.Rxc1 f5 24.Nd2 Rd8 25.Nf3 Nc6 26.Kf1 Kf7 27.e3[/font] draw (Aronian-Kasimdzhanov, Ol, Torino, 2006).
If [font color="darkorange"]21.Nd6 Rc2 22.b4[/font] then:

If [font color="darkorange"]22...Nc4?! 23.Nxb7! Rxe2 24.Nc5[/font] then:

If [font color="darkorange"]24...a5?[/font] then after [font color="darkorange"]25.Rdc1 Nd6 26.bxa5[/font] White wins (Tukmakov-Beliavsky, Op, Potoroz, 1996).
Black could last a little longer after [font color="purple"]24...Rb2 25.Rdb1 Rxb1 26.Rxb1.[/font]

[font color="hotpink"]22...Nc6 23.b5 Na5 24.Rab1[/font] gives White just a small advantage.

[font color="darkorchid"]19...Qc7 20.b4 h6 21.b5 Qe5 22.Qxe5 Nxe5 23.b6[/font] gives White a small advantage in space. (Timoshenko-Imad, Op, Dubai, 2000).

[font color="darkpink"]17...Qd8?! 18.Qc4! Bxd4 19.Rxd4 Qa5 20.b4[/font] gives Black a clear advantage in space.

[font color="burgundy"]13...Qa5 14.Bd2 cxd4 15.Nb5 Qd8 16.Nbxd4 Be4 17.Qe3[/font] is equal (Moradiabadi-Gundavaa, Asian Games TT, Guangzhou, 2010).

If [font color="magenta"]12...cxd4 13.Nxd5[/font] then:

If [font color="magenta"]13...Nxd5 14.Bxe7 Qxe7 15.Nxd4 Nc6[/font] then:

[font color="magenta"]16.Nxc6 bxc6 17.Qc4 Qb7 18.Rab1 a5 19.Rfc1[/font] gives White a slight advantage in space (Dr. Hübner-Lutz, Bundesliga 9695, Germany, 1995)
If [font color="darkorange"]16.Rac1 Nxd4 17.Qxd4 Rfd8 18.Rfd1[/font] then:

If [font color="darkorange"]18...a5?! 19.Qc5! Qe8[/font] then:

[font color="darkorange"]20.Qb5?! Qxb5 21.axb5 Kf8 22.Bxd5 exd5 23.Rc7 Rab8 24.Rd4[/font] gives White a Rook on the seventh (Romanishin-Gasthofer, IT, Hockenheim Willingen, 2006).
After [font color="purple"]20.Bxd5! exd5 21.Rxd5 Rdc8 22.Qe3[/font] gives White a significant advantage in space and, at least for the moment, an extra pawn.

[font color="hotpink"]18...h6 19.Qe5 Nf6 20.Bf3 Qb4 21.Kg2 Qxa4 22.Bxb7[/font] gives White a small advantage in space.

[font color="darkorchid"]13...Qxd5 14.h4 Nc6 15.Bxf6 gxf6 16.Rfd1[/font] is equal (Shimanov-A. Mammadov, World Youth, Porto Carras, 2010).

If [font color="darkred"]10...a5 11.Nc3 Na6 12.Bxf6 Bxf6 13.e4 Nb4 14.Rfd1 b6 15.Ne1 Be7[/font] then:

[font color="darkred"]16.Nb5 Qd7 17.Rac1 Rfc8 18.Nd3 Bb7 19.Ne5[/font] gives White a better center, a strong initiative and more space (Gleizerov-Naumkin, Op, Cappelle-la-Grande, 2004).
[font color="magenta"]16.d5 Bd7 17.Nf3 exd5 18.exd5 Bd6 19.Nd4 Re8[/font] (Fominyh-Herbela, Op, Cappelle-la-Grande, 2003).

If [font color="darkred"]10.Bf4 a5 11.Nc3 Na6 12.Ne5 Bxg2 13.Kxg2 Nd5 14.Rad1 Nxf4+ 15.gxf4[/font] then:

[font color="darkred"]15...Bd6 16.e3 Qh4 17.Qe2[/font] then:

If [font color="darkred"]17...Bxe5 18.fxe5 f6 19.exf6 Rxf6 20.f4 Nb4 21.Kh1 Rg6 22.Rg1 Rxg1+ 23.Rxg1 Qe7 24.Rg5[/font] then:

If [font color="darkred"]24...h6!?[/font] then:

If [font color="darkred"]25.Re5 Qf7 26.Qg2[/font] then:

[font color="darkred"]26...c6?! 27.Qe4! Nd5 28.Rxe6[/font] gives White a small advantage in space (Caruana-Karjakin, IT, Poikovsky, 2011).
[font color="burgundy"]26...Nc6! 27.Rb5 Rb8 28.Qe4 Qe8 29.d5[/font] gives White a small advantage in space.

[font color="darkpink"]25.Rb5!? c6 26.Re5 Qf7 27.Ne4 Nd5 28.f5[/font] gives White a slim advantage in space (Eljanov-Karjakin, Russian ChT, Dagomys, 2010).

[font color="darkorchid"]24...b6! 25.Re5 Qf7 26.Qc4 Re8 27.f5 g6 28.e4[/font] is equal.

[font color="darkorange"]17...f6 18.Nc4 g5 19.d5 e5 20.f5 Nc5 21.e4[/font] gives Black more space, but White has more freedom (Ivanchuk-Karjakin, IT A, Wijk aan Zee, 2010).

If [font color="magenta"]15...c6 16.e3 Nb4[/font] then:

[font color="magenta"]17.Kh1 Nd5 18.Rg1 Rc8 19.Ne4 f6 20.Nf3 Qe8[/font] gives Black a slight advantage in space (Pelletier-Bu Xiangzhi, Rpd IT, Cap d'Agde, 2010).
[font color="darkorange"]17.Rg1 Nd5 18.Kh1 f6 19.Nf3 Qd7 20.Rg3 Rf7[/font] gives Black a small advantage in space (Rodshtein-Harikrishna, World Cup, Khanty-Mansiysk, 2011).

9...Bc6 10.Nc3 Bxf3

If [font color="red"]10...Bb4!? 11.Bg5[/font] then:

If [font color="red"]11...Bxc3[/font] then:

If [font color="red"]12.Bxf6 Qxf6[/font] then:

If [font color="red"]13.bxc3 Nd7[/font] then:

If [font color="red"]14.Qa2 Bd5 15.Nd2 Bxg2 16.Kxg2[/font] then:

If [font color="red"]16...c5 17.Nxc4[/font] then:

[font color="red"]17...Rac8 18.Rab1 cxd4 19.cxd4 Rc7 20.Ne3 Qg6 21.d5 Qe4+ 22.Kg1 exd5 23.Rxd5 Nf6[/font] draw (Laznicka-Harikrishna, Op, Philadelphia, 2010).
[font color="burgundy"]17...Rfd8 18.a5 h5 19.h4 cxd4 20.cxd4 Nf8 21.e3[/font] gives White a substantial advantage in space (Laznicka-Bologan, World Cup rd 3.2, Khanty-Mansiysk, 2009).

[font color="darkpink"]16...Rac8 17.Qxc4 c5 18.Ne4 Qe7 19.d5 Nb6 20.d6[/font] gives White a small advantage from his passed pawn (Kaidanov-Z. Almasi, Ol, Yerevan, 1996).

[font color="darkorchid"]14.e4 b5 15.d5 exd5 16.exd5 Bb7 17.Nd4 bxa4 18.Qxa4[/font] is equal (Petrosian-Abramovic, IT, Yerevan, 1982).

If [font color="darkred"]13.Qxc3[/font] then:

[font color="darkred"]13...a5 14.Qxc4 Nd7 15.Qc2 Qg6 16.Qc3 Qh5 17.h3[/font] is equal (Iljushin-Stafansson, Euro Ch, Dresden, 2007).
[font color="magenta"]13...Qe7 14.Qxc4 Nd7 15.Rac1 Rfd8 16.Ne1 Bxg2 17.Nxg2[/font] gives White a small advantage in space (Azmaiparashvil-Novopashin, Soviet Ch 1st League, Volgodonsk, 1981).

If [font color="darkred"]12.Qxc3[/font] then:

If [font color="darkred"]12...Ne4 13.Bxd8 Nxc3 14.bxc3 Rxd8[/font] then:

If [font color="darkred"]15.Ne5 Bxg2 16.Kxg2[/font] then:

[font color="darkred"]16...Nc6 17.Nxc4 b5 18.axb5 axb5 19.Ne3[/font] draw (Brodsky-Friedel, Op, Hoogoveen, 2009).
[font color="purple"]16...f6 17.Nxc4 a5 18.Rab1 b6 19.e3 Nd7 20.Rd2[/font] gives White a fair advantage in space (Devereaux-Daoudi, Masters, Gibraltar, 2009).

[font color="darkorange"]15.Nd2 Bxg2 16.Kxg2 Nc6 17.Nxc4[/font] gives White a small advantage in space.

[font color="magenta"]12...Nbd7 13.Ne5 Bxg2 14.Kxg2 Nd5 15.Bxd8 Nxc3 16.bxc3 Raxd8 17.Nxc4[/font] gives White a small advantage in space.

If [font color="darkred"]11...Nbd7 12.d5 exd5 13.Nxd5[/font] then:

If [font color="darkred"]13...Be7 14.Nxe7+ Qxe7 15.Qxc4 Rfe8[/font] then:

[font color="darkred"]16.e3 h6 17.Bxf6 Qxf6 18.Qd4 Rad8[/font] draw (Piket-Anand, Amber Blind, Monte Carlo, 1996).
[font color="burgundy"]16.b3 h6 17.Be3 Nb6 18.Qc5 Qxc5 19.Bxc5 Nbd7 20.Rac1[/font] draw (Dizdar-L. B. Hansen, Ol, Torino, 2006).

If [font color="magenta"]13...Bxd5 14.Rxd5[/font] then:

[font color="magenta"]14...Qe8[/font] then:

If [font color="magenta"]15.Rdd1 a5 16.Qxc4 c6[/font] then:

[font color="magenta"]17.Bh3?! Ne5! 18.Nxe5 Qxe5 19.Bxf6 Qxf6 20.Qc2 Rad8[/font] draw (Wang Yue-Grischuk, Russian ChT, Dagomys, 2009).
[font color="burgundy"]17.Nd4 Rd8 18.Nc2 Nb6 19.Rxd8 Nxc4 20.Rxe8 Rxe8 21.b3[/font] gives White a slim advantage in space.

If [font color="darkorange"]15.Bxf6 Nxf6 16.Re5 Qb8[/font] then:

[font color="darkorange"]17.Rf5 Qc8 18.Rf4 c6 19.Rxc4 a5 20.e4[/font] gives White a fair advantage in space.
[font color="purple"]17.Qxc4!? a5 18.Re3 c6 19.Nd4 Rd8 20.Rd3[/font] is equal.

If [font color="darkorange"]14...Qe7?! 15.Bh3! Qe8 16.Rd4[/font] then:

[font color="darkorange"]16...h6? 17.Bxd7! Nxd7 18.Re4[/font] White soon wins (Romanishin-Agzamov, IT, Tashkent, 1980).
[font color="purple"]16...Bd6 17.Bxd7 Nxd7 18.Rxc4[/font] gives White a fair advantage.

11.Bxf3 Nc6 12.Bxc6 bxc6 13.a5

[font color="red"]13.Bg5 Rb8 14.e3 a5 15.Bxf6 Bxf6 16.Rac1 c5[/font] is equal (Laznicka-Bologan, World Cup, Khanty-Mansiysk, 2009).

13...Qb8 14.Ra4

If [font color="red"]14.Qa4 c5 15.Qxc4 cxd4[/font] then:

[font color="red"][i16.Rxd4 c5 17.Rd1 Qb4 18.Ra4 Qxc4 19.Rxc4 Rfb8[/font] is equal (Davis-Crowe, Corres, 1989).

14...Qb3

[font color="red"]14...c5?! 15.Rxc4! cxd4 16.Rdxd4 c5 17.Rh4 Re8 18.Be3[/font] soon wins a pawn for White (Khalifman-Spassov, IT, Moscow, 1985).

15.Qxb3 cxb3 16.Rc4 Rfd8 (N)

If [font color="red"]16...c5 17.dxc5 Rfd8 18.Rxd8+ Rxd8[/font] then:

If [font color="red"]19.Be3 Nd5 20.Nxd5 Rxd5 21.Rb4[/font] then:

[font color="red"]21...h6 22.Rxb3 Bxc5 23.Bxc5 Rxc5 24.Rb8+ Kh7 25.Rb7[/font] is equal and soon agreed drawn (Krasenkow-Khalifman, Soviet Youth Ch, Vilnius, 1988).
[font color="magenta"]21...g6 22.Rxb3 Bxc5 23.Bxc5 Rxc5[/font] draw (Kaidanov-Tukmakov, Soviet Ch 1st League, Kujbyshev, 1986).

[font color="darkred"]19.Rb4 Bxc5 20.Rxb3 h6 21.Kg2 Bd4 22.Rb7[/font] draw (C. Horvath-Stefansson, IT, Bischwiller, 1999).

If [font color="blue"]16...Rfb8 17.Bf4 Nd5[/font] then:

If [font color="blue"]18.Rxc6!? Nxf4! 19.gxf4[/font] then:

If [font color="blue"]19...Bb4 20.Ra1 Ra7 21.e3 Kf8[/font] then:

[font color="blue"]22.Kf1 Ke7 23.Rc4 Kd7 24.d5[/font] is equal (Fridman-Onischuk, Bundesliga 1011, Aue, 2010).
[font color="darkcyan"]22.Ne2[/font] draw (Polovodin-Timoshchenko, Soviet Ch ½-final, Irtusk, 1983).

[font color="dodgerblue"]19...Bd6!? 20.e3 Bb4 21.Rxc7 Bxa5 22.Rc5[/font] again gives Black a small advantage in space.

[font color="darkblue"]18.Nxd5 cxd5 19.Rxc7 Bf6 20.Bd6[/font] gives White a small advantage with more active pieces and more space.

17.Bf4

The game is equal.
If [font color="red"]17.Rxc6 Bb4 18.Bg5 Bxa5 19.Rd3[/font] then:

If [font color="red"]19...Bxc3[/font] then:

[font color="red"]20.Bxf6 gxf6 21.Rcxc3 Rac8 22.Rc4 e5 23.d5[/font] gives White the most active Rook and more freedom.
[font color="magenta"]20.Rcxc3 Ne4 21.Bxd8 Nxc3 22.Rxc3 Rxd8 23.e3[/font] gives White the active Rook.

[font color="darkred"]19...Rdb8 20.Bxf6 gxf6 21.Ne4 Kg7 22.e3 Rb5 23.Nc5[/font] gives White a slight advantage in space.

17...Rd7!?

This should give White the opportunity to take the advantage.
Better is [font color="red"]17...c5 18.Bxc7 Rxd4 19.Rcxd4 cxd4 20.Rxd4[/font] with equality.

18.Na4!?

White fails to capitaslize.
If [font color="red"]18.Rd3 c5 19.dxc5[/font] then:

If [font color="red"]19...Rc8 20.Rb4[/font] then:

[font color="red"]20...Bxc5 21.Rxb3 Bd4 22.Bxc7 Bxf2+ 23.Kxf2 Rdxc7 24.Rb6[/font] gives White more space and Black fewer pawn weaknesses.
[font color="burgundy"]20...Rxd3?! 21.exd3! Bxc5 22.Rxb3 h6 23.Rb7 Rd8 24.Na4[/font] gives White a fair advantage in space.

If [font color="darkred"]19...Rxd3 20.exd3[/font] then:

If [font color="darkred"]20...Ne8 21.Ne4[/font] then:

[font color="darkred"]21...h6 22.h4 Rb8 23.d4 Rb5 24.Kg2 Rxa5 25.Rb4[/font] gives White a fair advantage in space.
[font color="darkorange"]21...Rb8 22.d4 Rb5 23.Nc3 Rxa5 24.Rb4[/font] assures White of gaining a pawn with a slight advantage in space

If [font color="magenta"]20...Rd8?[/font] then after [font color="magenta"]21.Bxc7 Rc8 22.Bd6 Bd8 23.Rb4 Ne8 24.Bf4[/font] White has an extra pawn and Black is fighting for his life.

18...Nd5!?

Black sacrifices his extra pawn in order to weaken White's kingside.
If [font color="red"]18...Rad8! 19.Rd3 h6[/font] then:

[font color="red"]20.h4 Ne8 21.e4 Nf6 22.e5 Ng4 23.f3 g5[/font] is equal.
[font color="darkred"]20.Kg2 g5 21.Be3 Rd5 22.Rxb3 Rxa5[/font] is equal.

19.Rxc6!

White assumes a small advantage in space.

19...Nxf4 20.gxf4 Bb4?!

Black would do better to protect his c-pawn.
If [font color="red"]20...Ra7 21.e4 g6[/font] then:

[font color="red"]22.Kf1 Rd8 23.Ke2 Bb4 24.Nc5 Bxa5 25.Nxb3[/font] gives White the initiative and more space; Black has a healthier pawn formation.
[font color="darkred"]22.Rd3 Bb4 23.Rc4 Bxa5 24.Rxb3 Rd8 25.Kg2[/font] gives White a small advantage.

[center]BLACK: Eduardas Rozentalis[/center]

[center][/center]

[center]WHITE: Aleksandr Shimonov[/center][center]Position after 20...Be7b4[/center]

21.Nc5! Bxc5 22.Rxc5

White has leveled the pawn count and has a clear advantage in space.

22...Kf8

If [font color="red"]22...Rad8 23.e3 Rd5 24.Rdc1 h6 25.R1c3 Rxc5 26.Rxc5[/font] gives White the advantage with an active Rook eying weak pawns.

23.e3 Ke7 24.Rdc1 Ra7 25.R1c3

Also good is [font color="red"]25.Kg2 Rb7 26.Rc6 Ra7 27.Kf3 Kf6 28.R1c5 Ke7 29.Rc3[/font] when White has [ressure on Black's weakest pawns.

25...Rb7 26.Rc6 Rb5?

It is better for Black to protect his own a-pawn instead of attacking White's.
If [font color="red"]26...Ra7 27.Kg2[/font] then:

[font color="red"]27...Rd5 28.Rxc7+ Rxc7 29.Rxc7+ Ke8 30.Rb7 Rxa5 31.Rxb3[/font] leaves White with an extra pawn; both sides have active Rooks.
[font color="darkred"]27...g6?! 28.Kf3! Kd8 29.Rxb3 Rd5 30.Rc5 Ra8 31.Rxd5+[/font] gives White an extra pawn and activity for both his Rook and King.

[center]BLACK: Eduardas Rozentalis[/center]

[center][/center]

[center]WHITE: Aleksandr Shimonov[/center][center]Position after 26.Rb7b5[/center]

27.Rxa6!

In response to Black's last move, White takes Black's a-pawn and passes his own.

27...g5

No better is [font color="red"]27...Ke8 28.Kg2 Rdd5 29.Ra8+ Rd8 30.Ra7 Rc8 31.a6.[/font]

28.fxg5 Rxg5+ 29.Kf1 c5

If [font color="red"]29...Rh5 30.Ke2 Rxh2 31.Rac6[/font] then:

If [font color="red"]31...Rh5[/font] then after [font color="red"]32.a6 Rb5 33.Kf3 Rb8 34.Ke4 h6 35.f4[/font] White wins a pawn.
If [font color="darkred"]31...Rg2 32.Rxb3 Rg8 33.Kd3[/font] then:

[font color="darkred"]33...h5 34.Rb7 h4 35.Rcxc7 Rxc7 36.Rxc7+ Kf6 37.Rc1[/font] White's connected passed pawns win the day.
If [font color="magenta"]33...Ra8[/font] then after [font color="magenta"]34.Rb5 Kd8 35.b4 Kc8 36.Kc3 Rd8 37.Rbc5[/font] Black is eith squeezed to death by White's queenside pawns or allows his own pawns to fall like ripe apples.

[center]BLACK: Eduardas Rozentalis[/center]

[center][/center]

[center]WHITE: Aleksandr Shimonov[/center][center]Position after 29...c7c5[/center]

30.Rxc5 Rxc5 31.dxc5

White has two passed pawns.

31...Rd2

If [font color="red"]31...Rd1+[/font] then White wins after [font color="red"]32.Ke2 Rc1 33.Ra7+ Kf6 34.Rc7 Ra1 35.Kd3.[/font]

32.Ra7+ Kf6

If [font color="red"]32...Kd8[/font] then White wins after [font color="red"]33.Rxf7 Rxb2 34.Rb7 Kc8 35.a6.[/font]

33.c6 Rxb2 34.c7 Rc2

White wins faster after [font color="red"]34...Rb1+ 35.Kg2 Rc1 36.Rb7 b2 37.Rxb2 Rxc7 38.a6.[/font]

35.Rb7 b2 36.Rxb2 Rxc7 37.Ra2 Ke5 38.a6

Also good is [font color="red"]38.Ke2 Ke4 39.a6 Ra7 40.Ra4+.[/font]

38...Ra7 39.Ke2 Kd5 40.Kf3 f6 41.Kf4

[font color="red"]41.e4+ Kc6 42.Kg4 Kd6 43.Kf4 e5+ 44.Kf5[/font] also wins.

41...Kc4

Strictly speaking the King should head for the pawn.
[font color="red"]41...Kc5 42.e4[/font] then:

[font color="red"]42...Kd6 43.Ra5 Kc7 44.Ra1 Kd6 45.Ra3[/font] ties the Black Rook to stopping the a-pawn and leaves the White King a free hand against Black's pawns on the kingside.
If [font color="darkred"]42...Kb6[/font] then White wins after [font color="darkred"]43.Ra3 h6 44.Kg4 Rg7+ 45.Kh5.[/font]

42.e4 h6

If [font color="red"]42...Kb3 43.Ra1 h6 44.Kg4[/font] then:

[font color="red"]44...Kc4 45.f3 Kd3 46.Kh5 Ke3 47.Ra3+ Kf4 48.Kg6 leaves the White King ready to dine on Black's pawns, which Black cannot prevent, winning easily.[/font]
If [font color="darkred"]44...Kb2[/font] then White wins easily after [font color="darkred"]45.Ra5 Kc3 46.Kh5 Kd4 47.f3 Ke3 48.Ra3+.[/font]

43.Kg4 Kd3 44.f3 1-0

[font color="red"]44...Kd4 45.Ra4+ Ke5 46.Ra5+ Kd6 47.Kh5 Ke7 48.Kxh6[/font] gives White a second passer.
Grandmaster Rozentalis resigns.

madinmaryland

(64,931 posts)

7. Thank you!

Reply to Jack Rabbit (Original post)

Thu Feb 23, 2012, 10:25 PM

Feb 2012

Reply to this discussion