Chess (August): Wang Hao sqeeks by Magnus to win Biel

[Jack Rabbit]

17. B. Socko - Negi, Round 6

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Parimarjan Negi
[/center][font size="1"]Photo by rorkhete from Wikipedia (Creative Commons License, Attribution/Share Alike)
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Bartosz Socko - Parimarjan Negi
Sixth International Open, Round 6
Leiden, 12 July 2012

West India Game: Indian Queen's Gambit (London Opening/Hungarian Variation) (Grünfeld Defense)

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4@@[center]BLACK[/center]

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[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (London Opening)[/center][center]Position after 4.Bc1f4[/center]

• This we shall call the London Opening, although more formally it is called the Brinckmann Opening. Properly speaking, the London Opening is a branch of the Queen's Pawn Game, the characteristic move of which is Bc1f4: 1.d4 d5 2.Nf3 e6 3.Nf3 Nf6 4.Bf4.

4...Bg7 5.Nf3@@[center]BLACK[/center]

[center][/center]

[center]WHITE[/center][center]West India Game: Indian Queen's Gambit (London Opening/Hungarian Variation)[/center][center]Position after 5.Ng1f3[/center]

• There are two main branches of the London Opening. The text is the Hungarian Variation.
• [font color="red"](Grünfeld Gambit)[/font] If [font color="red"]5.e3 c5 6.dxc5 Qa5 7.Rc1[/font] then:
• If [font color="red"]7...dxc4 8.Bxc4 0-0 9.Nf3 Qxc5 10.Bb3 Nc6 11.0-0 Qa5 12.h3[/font] then:
• If [font color="red"]12...Bf5 13.Qe2 Ne4[/font] then:
• If [font color="red"]14.Nxe4 Bxe4[/font] then:
• If [font color="red"]15.Rfd1[/font] then:
• If [font color="red"]Qh5[/font] then:
• [font color="red"]16.Bc2 Bxc2 17.Qxc2 Qb5 18.a4 Qb4 19.Ne1 e5[/font] is equal (Aronian-Svidler, Tal Mem, Moscow, 2011).
• [font color="burgundy"]16.Rd7 e6 17.Bc2 Bxf3 18.Qxf3 Qxf3 19.gxf3[/font] is equal (Khenkin-Roiz, Ol, Dresden, 2008).
• [font color="darkpink"]16.Rd2 Rac8 17.Rcd1 Bxf3 18.Qxf3 Qxf3 19.gxf3 Na5[/font] is equal (Berkes-Tikkanen, Euro Club Cup, Rogaska Slatina, 2011).
• If [font color="darkred"]15...Rad8[/font] then:
• If [font color="darkred"]16.Rxd8 Rxd8[/font] then:
• If [font color="darkred"]17.Bxf7+ Kxf7 18.Ng5+ Kg8 19.Nxe4 Qxa2[/font] then:
• If [font color="darkred"]20.Kh2[/font] then:
• [font color="darkred"]20...Qd5 21.Nc5 b6 22.Na6 Ne5 23.Rc7 Rd7[/font] gives Black an extra pawn, but White has better pawns and more space (Prakash-Sasikiran, Indian Ch, Mumbai, 2003).
• [font color="burgundy"]20...a5 21.Qb5 Qd5 22.Qxb7 Qxe4 23.Rxc6 Bf6 24.f3[/font] gives White an extra pawn (Drozdovskij-Grnadelius, Op, Copenhagen, 2009).
• [font color="hotpink"]20.Nc5 Qxb2 21.Qc4+ Kh8 22.Nxb7 Qxb7 23.Qxc6[/font] is equal.
• If [font color="darkorange"]17.Rd1 Rxd1+ 18.Qxd1 Bxf3[/font] then:
• [font color="darkorange"]19.Qxf3 Qd2 20.Qg4 Bf6[/font] Black wins a pawn.
• [font color="purple"]19.gxf3 Qd8 20.Qc2 Qd7 21.Kg2 a6 22.a4 Ne5[/font] gives Black a small advantage in space.
• [font color="magenta"]16.Ng5 Bd5 17.Bc7 Qxc7 18.Rxd5 Rxd5 19.Bxd5 Qa5[/font] gives Black the initiative and a slight edge in space.
• [font color="burgundy"]15.Ng5 Bd5 16.Bxd5 Qxd5 17.b3 Rac8 18.Rfd1 Qa5[/font] is equal (Orsag-Oral, Czech ChT, 2001).
• If [font color="darkred"]14.Nd5 e5[/font] then:
• If [font color="darkred"]15.Bh2 Be6 16.Rfd1[/font] then:
• If [font color="darkred"]16...Rad8 17.Qc4 Nf6 18.e4 Nd7[/font] then:
• If [font color="darkred"]19.Qa4 Qxa4 20.Bxa4 Ndb8[/font] then:
• [font color="darkred"]21.b4 21...a6 22.Bb3 Kh8 23.a4 f5 24.b5 axb5 25.axb5 Nd4[/font] is equal (Danielian-Cmylte, Euro Club Cup W, Plovdiv, 2010).
• [font color="burgundy"]21.a3 f6 22.b4 a6 23.b5[/font] draw (Lukacs-W. Schmidt, Makarczyk Mem, Lodz, 1980).
• If [font color="darkpink"]19.Qe2 Ndb8 20.Bg3 Kh8 21.Bc4 Nd7 22.Bh4[/font] gives White more active minor pieces and more space (Farago-W. Schmidt, IT, Helsinki, 1981).
• If [font color="magenta"]16...Rfd8 17.Qc4 Nf6 18.e4 Rac8[/font] then:
• If [font color="magenta"]19.Ng5 Nd4 20.Ne7+ Kf8 21.Nxe6+ Kxe7 22.Nxd8 Rxc4 23.Bxc4[/font] then:
• [font color="magenta"]23...Ne8 24.Nxf7 b5 25.Bd5 Ne2+ 26.Kh1 Nxc1 27.Rxc1[/font] is equal (Kramnik-Kamsky, Tal Mem, Moscow, 2009).
• [font color="purple"]23...Nxe4 24.Nxf7 Qb6 25.Nxe5 Bxe5 26.Bxe5 Nf3+ 27.gxf3 Qxf2+ 28.Kh1 Qxf3+ 29.Kh2 Qf2+ 30.Kh1 Qf3+[/font] draws by repetition (Timman-Ivanchuk, Match, Hilversum, 1991).
• [font color="darkorange"]19.Qc5 Qxc5 20.Rxc5 Nxe4 21.Rxc6 Rxc6 22.Ne7+ Kf8 23.Nxc6 Rxd1+ 24.Bxd1 bxc6[/font] is equal and is shortly agreed drawn (Volzhin-Oral, Op, Koszalin, 1999).
• If [font color="magenta"]15.Rxc6 bxc6 16.Ne7+ Kh8 17.Nxc6[/font] then:
• If [font color="magenta"]17...Qb6 18.Ncxe5 Be6 19.Bxe6 Qxe6 20.Qc2[/font] then:
• If [font color="magenta"]20...f5 21.Qa4[/font] then:
• [font color="magenta"]21...a6 22.Rd1 Rad8 23.Rxd8 Rxd8 24.Nd4 Qe8 25.Qa5[/font] is equal (S. Brunello-Svidler, Ol, Khanty-Mansiysk, 2010).
• [font color="darkorange"]21...Qe8 22.Qa5 Rb8 23.Nc4 Rb7 24.Be5 Qd8[/font] is equal (Iljushin-Sasikiran, World Cup, Khanty-Mansiysk, 2005).
• [font color="purple"]21...g5 22.Bh2 Qe8 23.Qa5 Rb8 24.Nc4 Rb5[/font] is equal (Iljushin-Belov, Russian ChT, Sochi, 2006).
• If [font color="darkorange"]20...Nf6 21.Qa4 Nd5 22.Bg3[/font] then:
• If [font color="darkorange"]22...Nb6 23.Qa6 f6[/font] then:
• [font color="darkorange"]24.Nd4 Qc8 25.Qxc8 Raxc8 26.Nec6 Rf7 27.b4 f5 28.b5 Bxd4 29.Nxd4[/font] draw (Koneru-Gupta, Indian Ch, Visakhapatnam, 2006).
• [font color="purple"]24.Nd3 Qc4 25.Qxc4 Nxc4 26.Rc1 Rac8 27.Nd4 f5[/font] is equal.
• [font color="hotpink"]22...Bxe5 23.Bxe5+ Kg8 24.Rd1 Rfd8 25.e4 Ne7 26.Rc1[/font] gives White a small advantage in space.
• If [font color="darkorange"]17...Qc5 18.Ncxe5[/font] then:
• [font color="darkorange"]18...Qe7 19.Rc1 g5 20.Rc7 Qxc7 21.Ng6+ fxg6 22.Bxc7[/font] gives White an extra pawn and stronger pawn structure (Kharlov-San Segundo Carillo, Op, Melaga, 1999).
• If [font color="purple"]18...Kg8 19.g4 g5 20.Bh2 Be6 21.Bc2[/font] then:
• [font color="purple"]21...f5 22.Nd4 Bxe5 23.Nxe6 Bxh2+ 24.Kxh2 Qd6+ 25.Kg1[/font] gives White an extra pawn
• [font color="hotpink"]21...Bd5? 22.Nd7 Qa5 23.Nxf8 Rxf8 24.Rd1[/font] gives White two extra pawns.
• If [font color="darkred"]12...Qa6[/font] then:
• If [font color="darkred"]13.e4 Rd8 14.Qe1 Nb4[/font] then:
• If [font color="darkred"]15.Ng5[/font] then:
• [font color="darkred"]
• 15...e6 16.Rd1 Rxd1 17.Qxd1!
[/font] leaves White with serious threats against Black's back rank (P. H. Nielsen-Volokitin, Euro Club Cup, Rogaska Slatina, 2011).
• [font color="burgundy"]15...Nd3 16.Qd2 Be6 17.Nxe6 fxe6 18.Rcd1 Nc5 19.Qc2[/font] leaves White with a small advantage in pawn structure.
[font color="darkpink"]15.Ne5 Be6 16.Na4 Bxb3 17.axb3 Nd3 18.Nxd3 Qxd3[/font] is equal (Kramnik-Ivanchuk, Tal Mem Blitz, Moscow, 2008).
• If [font color="magenta"]13.Ne5 Nxe5 14.Bxe5 Be6 15.Bd4[/font] then:
• If [font color="magenta"]15...Rfd8 16.Bxe6 Qxe6[/font] then:
• [font color="magenta"]17.Qf3 b6 18.b3 Ne8 19.Rfd1 Rac8 20.Bxg7 Kxg7[/font] is equal and is shortly agreed drawn (H. Danielsen-Fernández García, Euro ChT, Debrecen, 1992).
• [font color="burgundy"]17.Qa4 a6 18.Rfd1 Rac8 19.Qb4 b5 20.Qa5 Rd6[/font] is equal (Neubauer-Borisek, Ol, Dresden, 2008).
• If [font color="darkorange"]15...Rfc8 16.Bxe6 Qxe6[/font] then:
• [font color="darkorange"]17.Qa4 a6 18.Qb4 b5 19.b3 Rc6 20.a4 bxa4 21.Nxa4[/font] is equal (Thomassen-Borisek, Euro ChT, Novi Sad, 2009).
• [font color="purple"]17.Qf3 Qc6 18.Qxc6 Rxc6 19.Nb5 Rxc1 20.Rxc1 a6[/font] is equal (Levitt-Gulko, Op, St. John, New Brunswick, 1988).
• If [font color="darkred"]7...Ne4 8.cxd5 Nxc3 9.Qd2 Qxa2[/font] then:
• If [font color="darkred"]10.bxc3[/font] then:
• If [font color="darkred"]10...Qa5 11.Bc4 Nd7[/font] then:
• If [font color="darkred"]12.Nf3 Nxc5[/font] then:
• If [font color="darkred"]13.Be5 Bxe5 14.Nxe5 f6[/font] then:
• If [font color="darkred"]15.Nf3 b5 16.Ba2[/font] then:
• [font color="darkred"]16...Bf5 17.0-0 Rc8 18.d6 Ne4 19.Qd5 Nxd6[/font] gives Black an extra pawn, remote connected passers and more space; White has a radiant Queen in the center (Pakarek-Stohl, Czechoslovakian Ch, Prague, 1986).
• [font color="burgundy"]16...0-0 17.0-0 Bd7 18.Nd4 Rac8 19.f3 Kg7 20.Rc2[/font] is equal (Salov-Milos, ITZ, Szirak, Hungary, 1987).
• [font color="darkpink"]15.Nd3 Bf5 16.Nxc5 Qxc5 17.Ba2 b5 18.0-0 Bd7 19.e4[/font] gives White a small advantage with a better center (Dautov-Krasenkow, TT, Novosibirsk. 1986).
• If [font color="magenta"]13.0-0 0-0 14.Be5[/font] then:
• If [font color="magenta"]14...Bxe5 15.Nxe5 f6[/font] then:
• If [font color="magenta"]16.Ra1 Qb6 17.d6+ Kg7 18.dxe7 Re8[/font] then:
• [font color="magenta"]19.Nf3 Rxe7 20.Rfb1 Qc7 21.Nd4 Ne4[/font] is equal (Kramnik-Carlsen, Amber Rapid, Nice, 2009).
• [font color="hotpink"]19.Qd4 Qc7 20.Nd3 Nxd3 21.Bxd3 b6[/font] is equal (Chekhov-Huzman, Soviet Army Ch, Tashkent, 1987).
• [font color="purple"]16.d6+ Kg7 17.dxe7 Re8 18.Qd5 Be6 19.Qd6 Ne4[/font] is equal (M. Petersson-Thorsteins, Iceland, 1988).
• If [font color="darkorange"]14...f6?[/font] then White wins after [font color="darkorange"]15.Ra1 Qd8 16.Bc7 Qd7 17.d6+ e6 18.Nd4.[/font]
• If [font color="magenta"]12.Ne2 Nxc5 13.0-0[/font] then:
• [font color="magenta"]13...e5 14.dxe6 Bxe6 15.Ra1 Qd8[/font] (Gulko-Peshina, Soviet Ch ½-final, Barnaul, 1984).
• [font color="darkorange"]13...b5?! 14.Ra1! Qb6 15.Rfb1 Bd7 16.Nd4 Ne4 17.Qd3[/font] turns the Black Knight into a desperado.(Dorfman-Gulko, ZT, Lvov, 1978).
• [font color="purple"]13...Qa4 14.Ba2 0-0 15.Ra1 Ne4 16.Qb2 Qa5 17.Rfc1[/font] is equal (Fritz 13).
• If [font color="magenta"]10...Qxd2+ 11.Kxd2 Nd7 12.Bb5 0-0 13.Bxd7 Bxd7 14.e4 f5[/font] then:
• [font color="magenta"]15.e5 Rac8 16.c4 Rxc5 17.Be3 Rc7 18.Nf3 b6 19.c5[/font] gives White a clear advantage in space (Seirawan-Adorjan, IT, New York, 1987).
• [font color="darkorange"]15.c4 Rfc8 16.c6 bxc6 17.d6 g5 18.Bxg5[/font] gives White more space and an acrive Bishop; each side has a passed pawn, but Whites's of of greater concern at the moment (Timman-P. Popovic, IT, Belgrade, 1989).
• If [font color="magenta"]10.Rxc3 0-0 11.Bc4 Qa1+ 12.Rc1 Qxb2[/font] then:
• If [font color="magenta"]13.Nf3 Nd7[/font] then:
• [font color="magenta"]14.Be2 Qa3 15.Nd4 Bxd4 16.exd4 Nf6 17.Bf3[/font] gives White greater activity, the Bishop pair and more space (Gulko-Eckert, US Ch, St. Louis, 2009).
• [font color="purple"]14.Ba2 Qa3 15.c6 bxc6 16.dxc6 Nc5 17.0-0 Nd3[/font] is equal (B. Socko-Svidler, Masters, Gibraltar, 2009).
• [font color="darkorange"]13.e4 a5 14.Ne2 a4 15.Rc2 Qa1+ 16.Rc1 Qb2 17.Rc2[/font] gives White a small advantage (Seirawan-Nakamura, US Ch, Seattle, 2003).

5...0-0 6.Rc1

• If [font color="red"]6.e3 c6 7.Rc1[/font] then:
• If [font color="red"]7...Bg4 8.Qb3 Bxf3 9.gxf3 Qd7[/font] then:
• If [font color="red"]10.cxd5 cxd5 11.Bb5 Nc6[/font] then:
• [font color="red"]12.Na4 Qh3 13.Ke2 Nd8 14.Nc5 Ne6 15.Bg3 Ng5[/font] is equal with the two side enjoying primacy on opposite ends of the board (Savon-Stein, Soviet Ch, Kiev, 1962).
• [font color="burgundy"]12.0-0 Qf5 13.Ne2 e5 14.Bg3 e4 15.fxe4 Nxe4 16.Bd3[/font] gives White a small advantage in space (Dr. Saidy-Martinovsky, Op, Lone Pine, 1972).
• If [font color="darkred"]10.h4 e6[/font] then:
• [font color="darkred"]11.Be5 Rd8 12.cxd5 exd5 13.Bd3 Qe7 14.Ne2 Nh5 15.f4[/font] gives White a fair advantage in space; Black has healthier pawns (Lukacs-Kolbus, 1st Saturday April, Budapest, 1996).
• [font color="magenta"]11.Bd3 Nh5 12.Bh2 Qe7 13.cxd5 exd5 14.Kd2[/font] gives White more space and the initiative; Black's pawns are better (Kakageldyev-Vaganian, Soviet Ch ½-final, Ashkhabad, 1978).
• If [font color="darkred"]7...Be6 8.Ng5 Bf5[/font] then:
• If [font color="darkred"]9.Be2 h6 10.Nf3 Be6[/font] then:
• [font color="darkred"]11.Nd2 Nbd7 12.0-0 dxc4 13.Nxc4 Nh5 14.Bxh5 Bxc4[/font] is equal (Taimanov-Bannik, Soviet Ch, Moscow, 1957).
• [font color="burgundy"]11.b3 Nbd7 12.h3 Ne4 13.0-0 Nxc3 14.Rxc3[/font] gives White a small advantage in space while Black has well-placed Bishops (Pinter-Tukmakov, Croatian ChT, Medulin, 1997).
• If [font color="magenta"]9.Qb3 Qb6[/font] then:
• If [font color="magenta"]10.Qxb6 axb6[/font] then:
• If [font color="magenta"]11.cxd5 Nxd5 12.Nxd5 cxd5 13.a3 Nc6 14.Bb5[/font] then:
• [font color="magenta"]14...Rfc8 15.0-0 Na5 16.Bc7 Nc4 17.Bxc4 dxc4 18.Bf4 b5 19.e4[/font] draw (Portisch-Haag, Hungary, 1965).
• [font color="burgundy"]14...Rac8 15.0-0 h6 16.Nf3 g5 17.Bg3 Be4 18.Nd2[/font] gives White better pawns and the initiative (Treppner-Jansa, IT, Berlin, 1984).
• [font color="hotpink"]14...e5! 15.Bxc6 bxc6 16.dxe5 c5 17.Rd1 h6[/font] gives White a slight advantage in space (Fritz).
• [font color="purple"]11.a3 h6 12.Nf3 Be6 13.cxd5 Nxd5 14.Be5 Nf6 15.h3[/font] is equal (Patos-Tseshkovsky, IT, Bucharest, 1974).
• If [font color="darkorange"]10.Qa3[/font] then:
• If [font color="darkorange"]10...Nbd7!? 11.cxd5 Nxd5 12.Nxd5 cxd5 13.Bc7[/font] then:
• If [font color="darkorange"]13...Qf6 14.Nf3[/font] then:
• [font color="darkorange"]14...Nb8 15.Be2 Rc8 16.0-0 Nc6 17.Bg3 Qe6 18.Rfd1[/font] gives White a fair advantage in space (Girilov-Tseshkovsky, Soviet Ch, Minsk, 1987).
• [font color="burgundy"]14...Nb6 15.Be2 Nc4 16.Qb4 Qc6 17.Bg3 Qb6 18.Qxb6 axb6[/font] is equal; White has slightly stronger pawns and Black has the initiative (Hausner-Jansa, IT, Trnava, 1982).
• If [font color="hotpink"]13...Rac8?[/font] then White gets a winning position with [font color="hotpink"]14.Bxb6! Rxc1+ 15.Kd2 Rfc8 16.Bd3 Rxh1 17.Qxe7.[/font]
• [font color="purple"]10...a5 11.cxd5 Nxd5 12.Nxd5 cxd5 13.Bd3 Qb4+[/font] is equal.

6...Be6

• If [font color="red"]6...dxc4[/font] then:
• If [font color="red"]7.e4 Bg4 8.Bxc4[/font] then:
• If [font color="red"]8...Nh5 9.Be3 Bxf3 10.gxf3[/font] then:
• If [font color="red"]10...e5 11.dxe5 Bxe5 12.Qxd8 Rxd8[/font] then:
• If [font color="red"]13.0-0[/font] then:
• If [font color="red"]13...Nd7 14.Ne2[/font] then:
• [font color="red"]14...Nb6 15.Bb3 c6 16.Rc2 Bc7 17.Kg2 a5 18.a3[/font] gives White a slight advantage in space (Ivanchuk-Domínguez Pérez, Mind Games Rpd, Beijing, 2011).
• [font color="burgundy"]14...Bxb2 15.Rb1 Ne5 16.Rxb2 Nxc4 17.Rxb7 Nxe3 18.fxe3[/font] gives White a slight advantage with the active Rook (Summerscale-J. H. Hodgson, Op, London, 2010).
• If [font color="darkred"]13...Nc6[/font] then:
• [font color="darkred"]14.Nd5 Na5 15.Bg5 Rd7 16.Bb5 c6 17.b4[/font] is equal (Pertlova-Padimi, World Jr Ch Girls, Yerevan, 2007).
• [font color="magenta"]14.Bd5 Nf4 15.Rcd1 Nxd5 16.Nxd5 f5 17.b3[/font] gives White a small advantage in space (Ftacnik-E. L'Ami, Op, Amsterdam, 2006).
• If [font color="darkred"]13.Ne2 Nc6[/font] then:
• If [font color="darkred"]14.0-0 Nd4 15.Nxd4 Bxd4[/font] then:
• [font color="darkred"]16.Rfd1 Bxb2 17.Rxd8+ Rxd8 18.Rb1 Be5 19.Rxb7[/font] gives White the active Rook (Qi Guo-Harika, Chinese League, Shenzhen, 2011).
• [font color="burgundy"]16.b4 a6 17.Rfd1 Bxe3 18.fxe3 Kf8 19.Kf2[/font] gives White a slight advantage with the better minor piece (I. Sokolov-Avrukh, Op, Reykjavik, 2012).
• If [font color="magenta"]14.f4 Bxb2 15.Rb1[/font] then:
• [font color="magenta"]15...Na5 16.Bd5 c6 17.Bxf7+ Kxf7 18.Rxb2 b5[/font] gives Black stronger pawns and a slight edge in space; each side has a passed pawn (Hopman-Shut, IT C, Wijk aan Zee, 2011).
• [font color="darkorange"]15...Ba3 16.0-0 Na5 17.Bb3 b6 18.Nc3 Nxb3[/font] leaves Black crushing White with her superiority in space (Pertlova-Harika, World Jr Ch Girls, Yerevan, 2007).
• If [font color="darkred"]10...e6 11.f4[/font] then:
• If [font color="darkred"]11...Qh4 12.Qf3 Nc6[/font] then:
• [font color="darkred"]13.Ne2 Rad8 14.Rd1 Na5 15.Bd3 c5 16.dxc5 Bxb2[/font] gives Black greater activity and stronger pawns (van Wely-Lin Weiguo, Ol, Manila, 1992).
• [font color="darkorange"]13.e5 Rad8 14.Ne2 Bh6 15.0-0 Ne7 16.Kh1[/font] draw (Razuvaev-Rytshagov, Op, Cappelle-la-Grande, 1995).
• [font color="magenta"]11...Nc6 12.d5 exd5 13.Nxd5 Nf6 14.e5 Nd7 15.Bb5[/font] gives White an outstanding advantage in space; Black has stronger pawns (Portisch-Ftacnik, ITZ, Biel, 1993).
• If [font color="darkred"]8...Bxf3[/font] then:
• if [font color="darkred"]9.Qxf3[/font] then:
• [font color="darkred"]9...Nh5 10.Bg5 Nc6 11.d5 Ne5 12.Qe2 Nxc4 13.Qxc4[/font] then:
• [font color="darkred"]13...a6 14.Qb4 Qd6 15.Bxe7 Qxb4 16.Bxb4 Rfe8 17.f3[/font] is equal (Bluvshtein-Nakamura, World Youth BU14, Oropesa del Mar, 2001).
• [font color="burgundy"]13...Qd7 14.0-0 a6 15.Qe2 Qd6 16.g3 Rae8 17.Be3[/font] gives White a comfortable game (Illescas Córdoba-Fernández García, Spanish Ch, León, 2006).
• If [font color="magenta"]9...Nc6 10.d5 Nd4 11.Qe3 c5[/font] then:
• [font color="magenta"]12.dxc6 Nxc6 13.h3 Qa5 14.0-0 Rad8 15.Bg5[/font] gives White a small advantage in space (Zagorovsky-Krzyszton, Corres, 1972).
• [font color="darkorange"]12.0-0 a6 13.e5 Ng4 14.Qg3 h5 15.Rfe1[/font] gives White a comfortable game; Black's Knight at g4 will have a diffcult time getting back in the game (Marin-M. Turov, EU I-net Ch, Cyberspace, 2004).
• [font color="darkorchid"]9.gxf3 Nh5 10.Be3[/font] transposes into the [font color="red"]main line of this note.[/font]
• If [font color="darkred"]7.e3 Be6 8.Ng5 Bd5[/font] then:
• If [font color="darkred"]9.e4 h6 10.exd5 hxg5 11.Bxg5[/font] then:
• If [font color="darkred"]11...Nxd5 12.Bxc4 Nb6 13.Bb3 Nc6[/font] then:
• If [font color="darkred"]14.d5 Nd4 15.0-0 Qd7[/font] then:
• If [font color="darkred"]16.Re1 Rfe8 17.h4 Rad8[/font] then:
• [font color="darkred"]18.Ba4 Nxa4 19.Qxa4 Qxa4 20.Nxa4 b5 21.Nc5 Rxd5 22.Na6 Re5 23.Nxc7 Rc8 24.Kf1 Rxe1+[/font] draw (Bareev-van Wely, Bundesliga 0001, Hamburg, 2001).
• [font color="burgundy"]18.Re4 Nxb3 19.Qxb3 Nxd5 20.Qxb7 Nxc3 21.bxc3[/font] gives White a slim advantage in space (Xu Jun-Ghinda, IT, Timoiasoara, Romania, 1987).
• If [font color="magenta"]16.Be3 Nxb3 17.Qxb3 Bxc3 18.Bxb6 axb6 19.Rxc3[/font] then:
• [font color="magenta"]19...Rfd8 20.g3 Ra5[/font] draw (Schussler-W. Schmidt, IT, Kiel, 1979).
• [font color="darkorange"]19...Ra5[/font] draw (Borisenko-Arlauskas, Corre, 1962).
• If [font color="magenta"]14.Ne2 a5[/font] then:
• If [font color="magenta"]15.a3 a4 16.Ba2[/font] then:
• [font color="magenta"]16...Nxd4 17.Nxd4 Qxd4 18.Qxd4 Bxd4 19.Rxc7 Rac8[/font] is equal (Dreev-Khalifman, IT A, Wijk aan Zee, 2002).
• [font color="purple"]16...Rc8 17.d5 Na5 18.Nc3 Nb3 19.Bxb3 axb3 20.Qxb3[/font] is equal (I. Sokolov-Kransenkow, TT, Shanghai, 2001).
• [font color="darkorange"]15.a4 Rc8 16.Be3 e5 17.d5 Nd4 18.Nc3 Qh4[/font] gives Black a slight advantage in space (Dreev-Ni Hua, TT, Shanghai, 2001).
• If [font color="magenta"]11...b5 12.Qf3[/font] then:
• If [font color="magenta"]12...c6 13.dxc6 Qxd4 14.Be2 a6[/font] then:
• If [font color="magenta"]15.0-0 Qc5 16.Be3 Qxc6[/font] then:
• [font color="magenta"]17.a4 e6 18.axb5 axb5 19.Nxb5 Ra2 20.Qxc6 Nxc6[/font] is equal (Babula-Kasparov, SX, Prague, 2001).
• A month after the simultaneous display, White tried [font color="burgundy"]17.Rfd1[/font] and after [font color="burgundy"]17...e5?! 18.b3! b4 19.Nd5 Nxd5 20.Rxd5[/font] White had a comfortable game (Babula-Epishin, Bundesliga 0102, Hamburg, 2001).
• [font color="darkpink"]15.Bxf6?! Qxf6 16.c7 Nd7 17.Rd1 Qe6[/font] gives Black a slight advantage.
• If [font color="darkorange"]12...b4?! 13.Ne4! Nxd5 14.Bxc4[/font] then:
• If [font color="darkorange"]14...Nb6[/font] then:
• [font color="darkorange"]15.Bb3!? a5! 16.a4 bxa3 17.bxa3 a4 18.Ba2[/font] gives White a fair advantage in space although he is sacrificing a pawn for space and freedom (Sliwa-Zapletal, Corres, 1978).
• [font color="burgundy"]15.Be3! a5 16.Ng5 Nxc4 17.Qxa8[/font] wins the exchange.
• If [font color="hotpink"]14...c6? 15.h4 f5 16.Nc5[/font] then:
• If [font color="purple"]16...Qd6 17.Bf4 e5[/font] then:
• If [font color="purple"]18.Bxd5+!? cxd5? 19.dxe5! Bxe5[/font] then:
• If [font color="purple"]20.Nd3!? Bxf4 21.Qxf4[/font] still gives White a strong advantage (M. Turov-Eljanov, Rector Cup, Kharkov, 2001).
• White wins after [font color="darkpink"]20.Bxe5! Qxe5+ 21.Kf1 Rd8 22.Re1.[/font]
• White wins after [font color="burgundy"]18.Bxe5! Bxe5 19.Bxd5+ cxd5 20.dxe5 Re8 21.0-0.[/font]
• If [font color="purple"]16...Bxd4??[/font] then White cleans Black's clock after [font color="purple"]17.Ne6!.[/font]
• If [font color="magenta"]9.Nxd5 Nxd5[/font] then:
• If [font color="magenta"]10.Bxc4 Nxf4 11.Qf3 e6 12.Qxf4[/font] then:
• [font color="magenta"]12...Qd6 13.Qxd6 cxd6 14.Bxe6 fxe6 15.Nxe6[/font] gives White the initiative and a small advantage in space (Brodsky-Kolosowski, Op, Cappelle-la-Grande, 2012).
• If [font color="hotpink"]12...c5 13.dxc5 Qa5+ 14.Ke2[/font] then:
• [font color="hotpink"]14...Nd7 15.Rc2 Nxc5 16.Rhc1 Rad8 17.a3 Qb6 18.b4[/font] is equal (Wang Hao-Grischuk, Mind Game Rpd, Beijing, 2011).
• If [font color="purple"]14...Nc6 15.Rhd1 Ne5 16.Qe4 Rad8 17.Rxd8 Rxd8 18.Rc2[/font] gives White a small advantage in space (Dreev-Safarli, Op, Baku, 2011).
• If [font color="darkorange"]10.Bg3 c5 11.Bxc4 cxd4 12.Qb3 dxe3 13.Bxd5 e6[/font] is equal (Furman-Korchnoi, Soviet Ch, Kiev, 1954).

7.Ng5 c5 8.dxc5 d4 9.Nb5 Nc6 (N)

• [font color="red"]9...Nh5 10.Nxe6 fxe6 11.Bc7 Qc8 12.g4 a6 13.gxh5 axb5[/font] is equal (Borisenko-Estrin, Corres, 1965).

10.Nc7 Bf5 11.Nxa8 e5

• [font color="red"]11...Qxa8 12.Bd2 h6 13.Nf3 e5 14.g3 e4 15.Nh4[/font] is equal.

12.Bd2 e4 13.Qb3 (N)

• If [font color="red"]13.e3 h6[/font] then:
• [font color="red"]14.Nh3?! Bxh3 15.gxh3 Ne5 16.Bg2 Nd3+[/font] gives Black a comfortable game (Grischuk-Carauana, Tal Mem, Moscow, 2012).
• If [font color="darkred"]14.exd4 hxg5 15.d5 Ne5[/font] then:
• [font color="darkred"]16.Be2! Nd3+ 17.Bxd3 exd3 18.0-0 Qxa8 19.Bxg5[/font] is equal as White has three pawns, a Rook, stronger pawns and a slight edge in space for two minor pieces.
• [font color="magenta"]16.h3?! Re8! 17.Rc3 Qxa8[/font] gives Black a comfortable game.

13...Qe7

• The game is equal.
• If [font color="red"]13...Qxa8 14.Qa3 Re8 15.e3 d3 16.Nh3 Qd8[/font] is equal.
• If [font color="darkred"]14.a3?! h6! 15.Nh3 e3 16.fxe3 Ne4[/font] give Black an active piece center and a fair advantag in space; both sides have pawn weaknesses.

14.e3 d3

• Black needn't be in any hurry to recapture the Knight. It's dead wood.

15.Nh3 Rxa8

• If [font color="red"]15...Bh6[/font] then:
• [font color="red"]16.g3![/font] (this is now the best way to develop the Bishop) [font color="red"]16...Ne5 17.Bg2 Rxa8 18.Nf4 Bxf4 19.gxf4 Nf3+[/font] is equal.
• [font color="darkred"]16.Nf4!? Bxf4! 17.exf4 Rxa8 18.Qa3 Re8 19.h3 Be6[/font] gives Black a slight edge with impressive center pawns and the initiative.

16.Nf4!

• The position is sharp. Black has advanced pawns in the center, including a passer. White's doubled pawns in the c-file are quite useful.

16...Rd8!?

• If [font color="red"]16...Rb8 17.Qa3[/font] then:
• [font color="red"]17...Nd7 18.b4 a5 19.Nd5 Qf8 20.b5 Nce5 21.Qxa5 Nxc5[/font] is equal (all three of us).
• [font color="darkred"]17...Qd7 18.b4 Ra8 19.Qb3 Rd8 20.Qa4[/font] gives White a slight advantage in a sharp position (Fritz).
• [font color="magenta"]17...a5 18.g3 Qd8 19.h4 Bf8 20.Bg2 b6 21.Qb3[/font] is equal (Rybka).

17.h3!

• White keeps the Bishop on its side of the board, giving him more activity while Black has a slight edge in space.
• [font color="red"]17.Nd5 Qd7 18.h3 Be6 19.Nf4 Bh6 20.g3[/font] gives White an active Knight and Queen; Black, for now, has a slight edge in space.

17...Ne5 18.Nd5 Qd7

[center]BLACK: Parimarjan Negi[/center]

[center][/center]

[center]WHITE: Bartosz Socko[/center][center]Position after 18...Qe7d7[/center]

19.Qb5!

• White proffers an exchange of Queens; although White's pieces have been more active, Black pieces are beginning to come to life and Black still enjoys a slight edge in space.

19...Nxd5

• [font color="red"]19...Qxb5?![/font] is an eample of "to take is a mistake" since it allows White to easily accomplish his goals in space after [font color="red"]20.Nxf6+ Bxf6 21.cxb5 Rc8 22.b3 Bd7 23.c6[/font] when he has an extra pawn and command of the queenside. He must still develop the King's Bishop vai g2.

20.Qxd7 Rxd7 21.cxd5 Rxd5

• White has an advantage on the queenside and can play there; Black has a better center but can make no further progress.

22.g4!?

• The flaw in White's plan is that it is not properly taking time into account. All Black will need to refute this move is a timely check to gain a tempo.
• If [font color="red"]22.Kd1 Be6 23.g4 Nf3 24.Bg2[/font] then:
• [font color="red"]24...Bxb2 25.Rb1 Bf6 26.Rxb7 Rxc5 27.Bxf3 exf3[/font] gives Black two active Bishops, an active Rook and restaints on White's center; White has a more active Rook.
• If [font color="darkred"]24...Nxd2?! 25.Kxd2[/font] then:
• [font color="darkred"]25...f5 26.gxf5 gxf5 27.Rhg1 Rd7 28.b3 Kf7 29.Rcf1[/font] gives White the exchange and a queenside majority; his plan is to push the f-pawn and either blockade or break up White's center pawns. Black has more space and should be able to get some counterplay.
• [font color="magenta"]25...Bxb2? 26.Rb1! Ba3 27.Bxe4 Rxc5 28.Rxb7 Rc2+ 29.Kxd3[/font] gives White the initiative; White's idle Rook will soon come into play.

[center]BLACK: Parimarjan Negi[/center]

[center][/center]

[center]WHITE: Bartosz Socko[/center][center]Position after 22.g2g4[/center]

22...Nf3+!

• This is a timely check, gaining an important tempo. The game is equal.

23.Kd1 Bxb2 24.gxf5?!

• White decides to take two minor pieces for a Rook, but that costs more time.
• If [font color="red"]24.Rc4 Bd7 25.Rxe4 Bc6 26.Bg2 Nxd2 27.Kxd2 Rxc5[/font] remains equal.

24...Nxd2!

• Black continues to profit by trafficking in tempi. It's possible that White didn't fully appeciate the impact of this move. Black now gains a tempo by taking the c-pawn with check.
• If [font color="red"]24...Bxc1?! 25.Bxc1! Rxc5 26.fxg6 hxg6 27.Bg2 Rc2 28.Bxf3 exf3[/font] remains equal.

25.Kxd2 Bxc1+ 26.Kxc1 Rxc5+ 27.Kb1?!

• The King should play to d1, where it will be active in the defense against Black's advanced passer.
• Better is [font color="red"]27.Kd1[/font] when:
• If [font color="red"]27...Kg7[/font] then after [font color="red"]28.fxg6 Rc2 29.f3 hxg6 30.a3 f5[/font] Black gets a small advantage from his active Rook.
• [font color="darkred"]27...gxf5 28.Rg1+ Kf8 29.f3 Rb5 30.Kc1 Ra5 31.Rg2[/font] gives Black a slight advantage.

27...gxf5

• It would be better to keep the g-file closed.
• Better is [font color="red"]27...Rxf5! 28.Bg2 Rb5+[/font] then:
• [font color="red"]29.Ka1 f5 30.Rc1 b6 31.Rc7 a6 32.h4 a5[/font] continues to gives Black three pawns for the Bishop, but Black still has counterplay with the Rook.
• [font color="darkred"]29.Kc1?! f5 30.Rd1 Rc5+! 31.Kd2 Rc2+ 32.Ke1 Re2+[/font] wins another pawn and renders White's Bishop useless.

28.f3?!

• White tries to break up Black's pawn chain, but it isn't very efficient.
• If [font color="red"]28.f4[/font] (saving a tempo and blockading the chain) then:
• [font color="red"]28...Rc3 29.Rg1+ Kf8 30.Rg2 b5 31.Kb2 b4[/font] gives Black a strong and clear advantage.
• [font color="darkred"]28...Rc2!? 29.Rg1+ Kf8 30.Rg2![/font] drives the Rook back.

28...f4!

• [font color="red"]28...d2! 29.Be2 f4 30.exf4 e3[/font] transposes into the text.

29.exf4

• No better is [font color="red"]29.fxe4 d2 30.Be2 fxe3.[/font]

29...d2 30.Be2 e3 31.Kb2?

• White loses a tempo and his position becomes hopeless, but it's probably just a case of losing now or a few moves from now.
• [font color="red"]31.Rg1+ Kf8 32.Kb2 Ke7 33.Rg5 f5 34.Rg7+ Kf6[/font] allows White to hang on longer.

[center]BLACK: Parimarjan Negi[/center]

[center][/center]

[center]WHITE: Bartosz Socko[/center][center]Position after 31.Kb1b2[/center]

31...Kg7!

• The King springs into action.

32.Rg1+ Kf6 33.h4

• If [font color="red"]33.Rg5[/font] then Black wins quickly after [font color="red"]33...Rc1 34.Rg2[/font] when:
• [font color="red"]34...Kf5 35.Rg5+ Kxf4 36.Rg4+ Kf5 37.Rd4 Re1[/font] the Bishop is forced from the watch over the queening square.
• If [font color="darkred"]34...d1Q 35.Bxd1 Rxd1[/font] then:
• [font color="darkred"]36.Kc2 Rd2+ 37.Rxd2 exd2 38.Kxd2 Kf5 39.Ke3 b5[/font] gives Black a won King-and-pawn ending.
• If [font color="magenta"]36.a4[/font] then Black wins after [font color="magenta"]36...Rd2+ 37.Rxd2 exd2 38.Kc2 Kf5 39.Kxd2 Kxf4.[/font]

33...h6 34.Bd3

• If [font color="red"]34.a3[/font] then Black wins after [font color="red"]34...b5 35.Bd3 Ke6 36.Ra1 a5 37.Rd1 a4.[/font]

34...b5 35.a3 a5 36.Rh1

• If [font color="red"]36.Rd1[/font] then Black wins after [font color="red"]36...a4 37.f5 Ke5 38.f6 Kxf6 39.f4 Ke6 40.Be2 Kf5.[/font]

36...b4

• Black presses his pawn majority.

37.axb4 axb4 38.Ra1

• If [font color="red"]38.Be2 Kf5 39.Rg1 Kxf4[/font] then:
• If [font color="red"]40.Rg4+ Kf5 41.Bd3+ Ke6[/font] then:
• [font color="red"]42.Re4+ Re5 43.Rd4 d1N+!! 44.Kc2 Nc3 45.Rxb4 e2[/font] wins a piece.
• If [font color="burgundy"]42.Be2[/font] then Black wins after [font color="burgundy"]42...Rc1 43.Re4+ Kf5 44.Rxe3 Re1 45.Rb3 Rxe2.[/font]
• If [font color="darkred"]40.Rd1 Kg3 41.f4 Kf2[/font] then:
• If [font color="darkred"]42.Ba6 Rc1 43.Rxc1 dxc1Q+ 44.Kxc1 e2 45.Bxe2 Kxe2[/font] gives Black an easily won King-and-pawn ending.
• [font color="magenta"]42.Bg4 Rc1[/font] amounts to the same thing.
• If [font color="blue"]38.Rd1[/font] then Black wins after [font color="blue"]38...Rc3 39.Be2 Kf5 40.Rg1 Kxf4.[/font]

[center]BLACK: Parimarjan Negi[/center]

[center][/center]

[center]WHITE: Bartosz Socko[/center][center]Position after 38.Ralh1[/center]

38...Rc3

• The Bishop must vacate and allow the Black King to attack White's pawns.

39.Be2

• If [font color="red"]39.Ra6+[/font] (the Rook should not leave the back rank unless White is intent on harikari) then [font color="red"]39...Kg7 40.Be2 Rc1 41.Rd6 Re1 42.Bc4 d1Q[/font] is crushing.

39...Kf5 40.h5

• If [font color="red"]40.Rg1[/font] then Black wins after [font color="red"]40...Kxf4 41.Rg4+ Kf5 42.Rd4 Rc1.[/font]

40...Kxf4 41.Rg1 f5 42.Kb1 Rc1+

• Also good is [font color="red"]42...b3 43.Rd1 Rc8[/font] when:
• If [font color="red"]44.Rf1[/font] then Black wins after [font color="red"]44...Rc1+ 45.Rxc1 dxc1Q+ 46.Kxc1 Kg3 47.Kd1 f4.[/font]
• [font color="darkred"]44.Rg1[/font] transposes after [font color="darkred"]44...Rc1+ 45.Rxc1 dxc1Q+.[/font]

43.Rxc1 dxc1Q+ 44.Kxc1 Kg3 45.Kd1 Kf2 46.f4 b3! 0-1

[center]BLACK: Parimarjan Negi[/center]

[center][/center]

[center]WHITE: Bartosz Socko[/center][center]Position after 46....b4b3[/center]

• It is not possible for White to stop all the pawns.
• White's best effort is [font color="red"]47.Bd3[/font] when White wins after [font color="red"]47...b2 48.Kc2 e2 49.Bxe2 Kxe2 50.Kxb2 Kf3.[/font]
• Socko resigns.