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[Jack Rabbit]

9. Gashimov - Radjabov, Group A, Round 11

[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.