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TESTC700 Release 2017-04-28
Send your 1.b4 games to me, please. Thank you! /Marek
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(c) Marek Trokenheim

1.b4 d5 2.Bb2 Bf5 3.e3 Nf6

(...)

4.a3 c6 5.d4 (5.Nf3 e6=) 5...Nbd7 (5...e6 6.Ne2=+) 6.Nd2 (6.Nf3 e6=) 6...Qc7 (6...e6 7.Ngf3=+) 7.Ngf3= e6 8.Ne5 (8.c4 Be7=) 8...Ne5 (8...Bd6 9.f4=+) 9.de5 Ng4 (9...Nd7 10.e4 de4 11.Nc4=+) 10.Nf3 Be4 11.b5 (better is 11.Nd2!? Ne5 12.Ne4 de4 13.Qd4=) 11...Bf3–/+ 12.Qf3 Ne5 13.Qf4 (13.Qg3 Qa5 14.c3 Nd7–/+) 13...Bd6 (13...Qa5 14.Kd1 Nc4 15.Bc4 dc4 16.Qc4 Rd8 17.Ke2 cb5 18.Qc3–/+) 14.Qa4 0–0 15.0–0–0 cb5–+ 16.Bb5 a6 17.Be5 Be5 18.Bd3 Qc3 19.Qb4 Qb4 20.ab4 Bc3 21.e4 b5 22.Rdf1 Bb4 23.e5 Bc3 24.f4 a5 25.Bb5 a4 26.Kd1 a3 27.Ke2 a2 28.Kd3 a1Q 29.Ra1 Ra1 (30.Ra1 Ba1–+; 29...Ba1 30.Rb1–+) 0–1. Fuchs – Stabenow,Juergen, corr SOK–87–13, 1988.

4.a3 Ne4 5.f3 Ng5 6.h4 Ne6+– 7.g4 Bg6 8.h5 Bc2 9.Qc2 Ng5 10.f4 Ne4 11.Bd3 Qd7 12.Be4 de4 13.Qe4 Qg4 14.Qb7 Qg3 15.Kf1 f5 16.Qa8 Kf7 17.Qb8 g6 18.hg6 Kg6 19.Qe8# 1–0. marus – GANGGREEN, internet, 2001.

4.a3 e5 5.Nf3 (5.Be5 a5 6.b5 Nbd7+=) 5...Bd6 (5...e4 6.Nd4 Bd7 7.Be2=) 6.c4 (6.Be5 Be5 7.Ne5 0–0+=) 6...b6 (better is 6...dc4!? 7.Be5 Bd3=) 7.cd5 e4 (7...0–0 8.Ne5 Be5 9.Be5 Nd5 10.Qf3+/–) 8.Nh4 (8...Bd7 9.d3 Nd5 10.Qh5+= (10.de4?! Ne3 11.Qe2 Nf1=)). thedesertfox (1970) – wizardshadowlord, net–chess.com, 2004.

4.a4 c6 5.c4 e6 6.c5 Be7 (6...a5 7.d4 ab4 8.Nf3–/+) 7.h3 Nbd7 8.Nf3 h6 (8...a5!?–/+) 9.d4 Rb8 10.b5 Bb1 11.Qb1 Qa5 12.Nd2 Ne4 13.Qc2 Ndf6 14.Bd3 0–0 15.Ke2 Nd2 16.Qd2 Qd2 (16...Qc7 17.Rhb1=) 17.Kd2+= Rfc8 18.f3 b6 19.cb6 ab6 20.g4 Bb4 21.Ke2 cb5 22.ab5 Ba5 23.e4 Rc7 24.e5 Nd7 25.Ra4 Rbc8 26.Ba3 f6 27.f4 Kf7 28.Bd6 Rc3 29.f5 ef5 30.Bf5 (30.gf5 fe5 31.de5 Ne5 32.Be5 Re8 33.Ra5 Re5 34.Kd2 Rd3 35.Kd3 ba5=) 30...Ke8? (better is 30...Rc2 31.Bc2 Rc2 32.Kd1 Rb2+/–) 31.Bg6+– Kd8 32.e6 Nb8 33.Ba3 (33.Bf5 R8c7+–) 33...Rc2? (better is 33...R8c7+–) 34.Bc2 Rc2 35.Kf3 f5 (35...Rc3 36.Kf4 g6 37.Bd6+–) 36.Rf1 (36.gf5 Rc3 37.Kf4 Rc4 38.Rc4 dc4+–) 36...Rh2 (36...g6+–) 37.Ra5! ba5 38.Bd6 Rh3 39.Kg2 Rb3 (39...Re3 40.Rf5 Re6 41.Bb8 Kc8+–) 40.Rf5 Kc8 1–0. Biberger,Hans (2030) – Obermaier,Josef (1750), Wch Seniors, 1998.

4.b5 g6 5.Nf3 Bg7 6.Be2 0–0 7.0–0 c6 8.a4 cb5 9.ab5 b6 10.Nd4 Bd7 11.f4 Be8 12.Nc3 Nbd7?? (better is 12...Bd7+/–) 13.Nc6+– Qc7 14.Ne7 Kh8 15.Bf3 (15.Ncd5 Nd5 16.Nd5 Qd6 17.Bg7 Kg7+–) 15...Nc5 (15...d4 16.ed4 (16.Ba8?! dc3 17.Bc3 Qd8+–) 16...Rd8 17.Nc6+–) 16.Ned5 Qd6 (16...Nd5 17.Nd5 Qd8 18.Bg7 Kg7+–) 17.Nf6 Bf6 (17...Qf6 18.Ba8 Bb5 19.Nb5 Qb2 20.Rb1+–) 18.Ba8 Bd7 (18...Qd8 19.Ra7 Bg7 20.Qe2+–) 19.Ra7 Ra8 (19...Kg7 20.d4 Qb8 21.Qa1+–) 20.Ra8 Kg7 21.d4 Ne6 22.Ne4 Qe7 23.Ba3 1–0. Janek – tchbov, internet, 2016.

4.Bb5 Nbd7 5.a3 c6 6.Be2 e5 7.Nf3 d4 (better is 7...Bd6!?=+) 8.ed4+= e4 9.Nh4 (better is 9.Ne5+=) 9...Nd5?? (better is 9...Be6 10.g3 a5=) 10.Nf5+– Qf6 11.Ne3 Nf4 12.0–0 Bd6 13.Ng4 Qh4 14.h3 h5 15.Ne5 Qg5 16.Nd7?? Nh3 17.Kh1–+ Qh4 18.g3 Nf2 19.Kg2 Qg3# 0–1. ZZMeB4 (1705) – bummerdan (1755), caissa.com, 2007.

4.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6).

4.d3 Nbd7 5.Nd2 e5 6.a3 c5 7.b5 Bd6 8.c4 d4 (8...Be6 9.Ngf3+=) 9.ed4 (better is 9.Qf3!? de3 10.fe3+=) 9...ed4–/+ 10.Qf3 Bg6 11.Qb7 0–0 12.0–0–0 (12.Kd1 Ne5–/+) 12...Bf4 (better is 12...a6!?–+) 13.g3 Bh6 14.f4 Ng4 15.Bh3 (15.Bg2 Rb8 16.Qa7 Nf2+=) 15...Ndf6 (15...Nf2!? 16.Bd7 Nd3 (16...Nh1?! 17.Nh3=) 17.Kb1 Nf2 18.Kc1 Qa5–+ (18...Nh1?! 19.Nh3=)) 16.Qf3 Ne3 17.Nb3 (better is 17.Re1!?–/+) 17...Bh5–+ 18.g4 Bg4 (18...Nd1 19.Kd1 Bg4 20.Bg4+/–; 18...Neg4 19.Qg3 Qd6 20.Rf1–+; 18...Nfg4?! 19.Rd2 Qe7 20.Ne2–+) 19.Bg4 Nfg4 20.Nc5 Nd1 21.Kd1 Ne3 22.Kd2?? (22.Kc1 Re8 23.Ne2 Qe7 24.Bd4 Nf5–+) 22...Qd6 (better is 22...Qa5 23.Ke2 Rfe8–+) 23.Ne4 Qf4 24.Qf4 Bf4 25.Ke2 Nf5 26.Nf3+= Attacks the isolani on d4 26...Be3 27.Ng3 Ng3 28.hg3 Rad8 29.Rh4 Rfe8 30.Re4 f5 31.Re8 Re8 32.Kf1 Rd8 33.Ne1 f4 34.g4 Kf7 35.a4 Ke6 36.Ba3 h5! 37.gh5 Rh8 38.Bc5? Rh5–+ 39.Ba7 Rh1 40.Ke2 Rh2 41.Kf3 Kf5 42.Ng2 g5 43.Ne3 de3 44.Be3 g4 0–1. plunderman (1695) – ilki (1665), gameknot.com, 2007.

4.Bd3 Bg6 5.Bg6 hg6 6.Nf3 e6 7.a3 Nbd7 8.0–0 (8.Nc3 Bd6=) 8...c6 9.d3 Bd6 10.c4 Qc7 h2 draws heavy fire 11.h3 dc4 12.dc4 0–0–0 13.Qc2 Kb8 14.c5 Be5 15.Ne5 Ne5 16.f4 Ned7 17.Nd2 e5 (17...Nd5 18.Nc4=) 18.Nc4+= ef4 19.ef4 Nd5 20.Bg7 Rh7 21.Bb2 Nf4 (21...Rh4 22.Nd6+/–) 22.Nd6 Nd5 23.Rf7 (23.Nf7 Rg8 24.Nd6 Re7+/–) 23...Rf7+/– 24.Nf7 Rf8 25.Qg6 Nf4 26.Qe4 a6? (better is 26...Nh3 27.gh3 Qg3 28.Qg2 Qe3 29.Kh2 Rf7 30.Qg8 Rf8 31.Qg3 Qg3 32.Kg3 Rg8 33.Kf4 Rf8 34.Kg4 Rf2+–) 27.Rf1 (27.Rf1 Nd5 28.Be5 Ne5 29.Qe5 (29.Ne5?! Re8 30.Re1 Ka8+–) 29...Qe5 30.Ne5+–) 1–0. Bertel,Michael (1765) – Verhaeren,Gertjan, TE.2004.P.01713, 2004.

4.Be2 g6 5.d4?? (better is 5.g4 Bg4 6.Bg4+–) 5...Bg7= 6.Nf3 0–0 7.0–0 c6 8.a4 Nbd7 9.c4 dc4 10.Bc4 Bg4 11.Be2 Nd5 12.Qb3 Be6 13.Qa3 Bg4 14.h3 Bf3 15.Bf3 (worse is 15.gf3 e5 16.Rd1 Qg5 17.Kh2 Qh4+=) 15...e5 16.Bd5 cd5 17.de5 Ne5 18.Bd4 Nc4 (18...a5 19.ba5 Ra5 20.Nd2=) 19.Qc3+= Bd4 20.Qd4 Qd6 (20...Qb6 21.Rd1+/– (21.Qd5?! Qb4 22.Rc1 Rac8=)) 21.b5 (21.Nc3 a5+/– (21...Qb4?? 22.Nd5 Qd6 23.Qc4+–)) 21...a6 22.Nc3 Rfd8 23.Rfd1 Nb2 24.Rd2 (24.Rdb1 Nc4+/–) 24...Nc4+= 25.Rda2 b6 (25...Qb6 26.Qb6 Nb6 27.ba6 Ra6 28.Rd1+=) 26.Rd1 ab5 27.Nb5 Qb4 28.Nc7 Rac8 (better is 28...Ra5!?+=) 29.Nd5+– Qd6? (better is 29...Qa5+–) 30.Rc2 Ne5 31.Rc8 Rc8 32.f4 (better is 32.Nb6 Qd4 33.ed4+–) 32...f6?? (better is 32...Nd7+–) 33.fe5 fe5 34.Qg4 (34.Qb6 Qb6 35.Nb6 Rc3+–) 34...Rd8 (34...Rf8 35.Qc4 Kg7 36.Rc1+–) 35.e4 (35.Nc3!? Qe7 36.Rd8 Qd8 37.Qe6 Kg7 38.Qe5 Kf7 39.Qd5 Ke7 40.Qd8 Kd8+–) 35...Kg7 36.Rc1 Qa3 (36...Rd7+–) 37.Rc7 Kh8 38.Qh4 Qc1 (38...Qa1 39.Kh2 Qg1 40.Kg1 Rd7 41.Rd7 h6 42.Qd8) 39.Rc1 1–0. mikebaldini (1700) – wokkels, gameknot.com, 2014.

4.Nf3 a5 5.a3 (5.ba5 Ra5 6.Be2 Nc6=) 5...ab4=+ 6.ab4 Ra1 7.Ba1 e6 8.b5 Nbd7 9.Be2 Bd6 10.0–0 (10.Nh4 Bg6=) 10...0–0 (10...e5 11.Nc3=+) 11.c4 (11.Nh4!?=) 11...dc4=+ 12.Bc4 Nb6 13.Be2 Qe7 14.Ne5 Ra8 Black launches an attack 15.Bd4 Nfd7 16.Nd7 Nd7 17.Qb3 (17.f4!?=+) 17...e5–/+ 18.Bb2 Nc5 19.Qc3 Ra2 20.Bc4 Na4–+ 21.Qa5 Rb2 22.Qa4 Rb1 23.Qa8 Qf8 24.Qb7 Rf1 25.Kf1 Qc8 26.Qd5 Be6 27.Qc6 Bc4 28.Qc4 Qa8 29.Qc3? Qa4 30.g3 Qb5 31.Kg2 Qe2 32.d4 e4 33.Qc6 Qf3 34.Kg1 h5 35.Qc1 h4 36.Qf1 hg3 37.hg3 Bg3 38.fg3 Qg3 39.Kh1 Qe3 (40.Qc4 Qh3 41.Kg1 Qg3 42.Kh1 e3–+) 0–1. Hasler,Ulrich – Maran,W, corr ICCF II–GT–20, 1992.

4.Nf3 c5 5.bc5 Nc6 6.d4 e6 7.Nbd2 Be7 8.Be2 Nb4 9.a3?? (9.Bb5 Kf8 10.0–0 Qa5+/–) 9...Nc6?? (better is 9...Nc2 10.Kf1 Na1 11.Bb5 Kf8 12.Qa1 b6–+) 10.0–0 0–0 11.Nh4 Bg6 12.Ng6 hg6 13.f3 b6 14.cb6 Qb6 15.Rb1 Qc7 16.c4 dc4 17.Nc4 Nd5 18.Rc1 Qd7 19.e4 (better is 19.Qd3+–) 19...Nb6?? (19...Nf4!? 20.Re1 Ne2 21.Re2 Bg5+/–) 20.Ne3 (20.Nb6 ab6 21.Bb5 Rfc8 22.Rc6 Ba3 23.Rc8 Qc8+–) 20...Rfd8? (20...Bf6 21.e5 Be7 22.Bb5+–) 21.Nc2 (better is 21.Bb5 Rac8 22.d5 ed5 23.ed5 Nd5 24.Rc6 Qc6 25.Bc6 Ne3 26.Qa4 Nf1 27.Kf1+–) 21...Bf6 22.e5 Bg5 23.f4 Be7 24.Bf3 Nd5 25.Kh1 Rab8 26.Ba1 Bf8 27.Qe2 Rdc8 28.Be4 Nce7 29.g4 Qb5 30.Qb5 Rb5 31.Nb4 Rc1 32.Rc1 Ne3 33.Rc3 Ng4 34.Kg2 Nf5 35.h3 (35.Nc2 Rb1 36.Bf5 gf5+/–) 35...Bb4 (35...Nge3 36.Kf3 a5 37.Bf5 Nf5 38.Nc2=) 36.ab4 (36.Rc8 Bf8 37.hg4 Ne3 38.Kf3 Rb3+/–) 36...Ngh6 (better is 36...Nge3 37.Kf3 Nd5 38.Bd5 Rd5 (38...Nd4? 39.Ke4 Ne2 40.Rc8 Kh7 41.Bc4 Rb4 42.Rc7+–) 39.Rc8 Kh7+=) 37.Kf3?? (37.Rc8 Kh7 38.Bc3 Ne3 39.Kf3 Nd5 40.Bd5 Rd5+/–) 37...Kh7?? (37...Nd4 38.Ke3 Nhf5 39.Kd3 Rb4 40.Rc8 Kh7 41.Bc3–/+) 38.Bb2?? (better is 38.Rc4+/–) 38...Nd4–/+ 39.Ke3 Nhf5 (40.Kd3 Rb4–+) 0–1. revrevrevrev – Chakra, Live Game Caissa's Web, 2004.

4.Nf3 Qd6 5.a3 h5 6.Be2 g5 7.Ng5 Rg8 8.f4 Bh6 9.h4 Bg4 10.d4 Be2 11.Qe2 Bg5 12.hg5 Ng4 13.Rh5 Qe6 14.Kd2 c6 15.Rh4 f5 16.Nc3 Na6 17.Rg1 0–0–0 18.Rh3 b5 19.a4 Nb4 20.ab5 c5 21.dc5 d4 22.ed4 Rd4 23.Rd3 Qe2 24.Ne2 Rd3 25.cd3 Rd8 26.d4 e5 27.Ba3 Nd5 28.fe5 f4 29.Kc2 Nde3 30.Kb3 Nd5 31.Bc1 Nge3 32.Nf4 Nf4 33.Be3 Ne2 34.Rd1 Rh8 35.Re1 Ng3 36.d5 Nf5 37.c6 Rh2 38.Rf1 Ne3 39.Rf8 Kc7 40.d6 Kb6 41.Rb8 Kc5 42.c7 Kd5 43.d7 Rg2 44.c8Q Rg3 45.d8Q Ke4 46.Qb7 Nd5 47.Ka4 Rd3 48.e6 a5 49.Qh7 Kd4 50.Qdh8 Kc4 51.Rc8 Nc7 52.Qc7 Kd5 53.Qce5# 1–0. Machete99 – guest229, ICC, 2002.

4.Nf3 Be4 5.d3 (5.Nc3 e6=) 5...Bf3 6.Qf3 e6 7.a3 (7.Bf6 gf6 8.a3 a5+=) 7...c5 (7...Nbd7 8.c4=) 8.Be2 (8.bc5!? Bc5 9.Bf6 Qf6 10.Qf6 gf6 11.d4+=) 8...cb4=+ 9.0–0 Nc6 10.ab4 (10.Rc1 Rc8=+) 10...Bb4 11.Na3 0–0 12.Rfb1 d4 (12...e5 13.c4=+) 13.Nb5 (13.ed4 Nd5 14.Nb5 a6–/+) 13...de3 (13...e5 14.ed4 ed4 15.c3 dc3 16.Bc3 Bc3 17.Nc3–+) 14.fe3= a6 15.Nd4 Ne5 (15...Nd5 16.Nc6 bc6 17.d4=) 16.Qh3 (16.Qb7 Bd2 17.Ne6 fe6 18.Be5 Be3 19.Kh1 Rf7+=) 16...Ng6 17.c4 e5 18.Nf5 Bd2 19.Ba3+/– Re8 20.Rb7 Bc3 21.Rf1 Qa5 22.Rf7 Kf7 23.Qh7 Nh7?? 24.Nh6 Ke6 25.Bg4# 1–0. pcmvr (1670) – juancabeta, internet, 2005.

4.Nf3 Bg4 5.Be2 Bf3 6.Bf3 Qd6 7.a3 c5 (7...e5 8.c4=) 8.c3 (8.bc5!? Qc5 9.Bf6 gf6 10.d4+/–) 8...Nbd7 9.d4 cd4 10.cd4 g6 11.Nc3 Bg7 12.Qb3 d5 draws heavy fire 12...0–0? (better is 12...e6+=) 13.Nd5+– Nd5 14.Qd5 Qc7? (better is 14...Qd5 15.Bd5 Rab8+–) 15.Rc1 Qd8 16.Qb7 Nb6 17.Qa6 Qd6 (17...Nd5 18.Rc5 e6 19.0–0+–) 18.Ba8 Ra8 19.Qb7 e5 (19...Bf6 20.Rc6 Rb8 21.Qc7 Qc7 22.Rc7+–) 20.de5 Be5 21.Be5 Qd3 (21...Qe5 22.0–0 Qd5+–) 22.Rd1 (22.Qa8 Na8 23.Rc8 Qd8 24.Rd8) 22...Qc2 23.0–0 (23.Qa8 Qc8 24.Qc8 Nc8 25.Rd8) 23...Qf5 (23...Qc8 24.Qe7 Nc4 25.Ba1+–) 24.Bd4 (24.Qa8! Qc8 25.Qc8 Nc8 26.Rd8) 24...Re8 (24...Qd5 25.Qc7 Qe6 26.Bb2+–) 25.Qa7 Nd5 (25...Nc4 26.Qa6 Qe6 27.Qe6 fe6 28.Rd3+–) 26.Rfe1 (26.Bb2 Nf6+–) 26...h5 27.Bb2 h4 (27...Nf6 28.Qc5 Qc5 29.bc5+–) 28.Qd4 h3 29.Qh8# (29.Qg7#) 1–0. nordlicht (2070) – harzer, gameknot.com, 2006.

4.Nf3 Bg6 5.d4 e6 6.a3 Nbd7 7.Bd3 Bd6 8.0–0 c6 9.Nbd2 Ne4 10.Qe2 b5 (10...a5 11.ba5 Qa5 12.c4=) 11.Ne5= Qc7 12.f4 (12.Ng6 A) 12...hg6?! 13.h3= (13.Ne4?? Bh2 14.Kh1 Bg1 15.Qh5 Rh5 16.Kg1 Qh2); B) 12...Bh2 13.Kh1 hg6–+) 12...f6?? (better is 12...Nd2 13.Qd2 a5=) 13.Ng6+– hg6 14.Ne4 de4 15.Be4 f5 16.Bd3 g5 17.g3 0–0–0 (17...Nf6 18.Kg2 (18.fg5?! Ng4=) 18...Qb7 19.fg5+–) 18.c4 Rh3 (18...gf4 19.ef4 bc4 20.Bc4 Rde8 21.Be6 Kd8+–) 19.cb5 Nf6 (19...Rdh8 20.Rf2+–) 20.Rac1 (20.fg5 Bg3 21.Rfc1 Bh2 22.Kf1 Qg3 23.Rc6 Kd7=) 20...Qb8 21.Qg2 (better is 21.Bc4 Re8 22.Qg2 Rh7+–) 21...Rdh8 22.Qc6 Kd8 23.Rf2 (23.b6!? ab6 24.Rf2 Ng4+–) 23...Ng4 24.Bf1?? (24.Rfc2 Rh2 25.Qf3 Rh1 26.Qh1 Rh1 27.Kh1 Qb7 28.e4 gf4 29.gf4 Bf4 30.Rc8 Ke7 31.R1c2 fe4 32.Be2 Nf2 33.Kg2–/+) 24...Nf2= 25.Bh3 Nh3 26.Kg2 gf4 27.ef4 g5?? 28.d5+– gf4?? 29.Bh8 Ng5 30.de6 Ne6 31.Bf6 Be7 32.Rd1 (32.Rd1 Nd4 33.Rd4 Qd6 34.Rd6) 1–0. Fournier,Frederic (1895) – Josse,Sebastien (1890), Coupe, 2007.

4.Bf6 gf6 5.c4 (5.Nf3 e5=) 5...e6 (5...dc4 6.Bc4 Qd6 7.a3=) 6.a3 (6.cd5 ed5 7.Nf3 Nc6= (worse is 7...Bb4 8.Qa4 Nc6 9.Nd4+/–)) 6...c6 (6...dc4 7.Bc4 a6 8.d4=) 7.d4 (7.Nf3 h6=) 7...Nd7 (7...dc4 8.Bc4 Rg8 9.g3=) 8.Bd3 Bd3 9.Qd3 dc4 10.Qc4 Nb6 11.Qc2 Nd5 (11...Rg8 12.Kf1+=) 12.Nf3 (12.Ne2 a6=) 12...Bd6 (12...a5!?+= is an interesting idea) 13.Nbd2 f5 14.Rc1 (14.Qb2 0–0=) 14...a6 (14...a5 15.h3+=) 15.g3 (15.0–0 h5=) 15...h6 (15...a5 16.ba5 Ba3 17.Rd1=) 16.0–0 Qc7 17.e4 fe4 18.Ne4 Be7 (18...0–0–0 19.Rfd1=) 19.Rfd1 (19.Ne5 Bf8+=) 19...Rg8 (19...a5 20.Nc5=) 20.Rd3 (better is 20.Ne5+=) 20...f5? (20...0–0–0 21.Ne5=) 21.Nc3 (21.Nc5!? Nf4 22.Rb3+/–) 21...Nc3 22.Rc3 Bg5 23.Re1+– Qd6? 24.Qf5 Kd7 25.Ne5 Kc7 26.Qf7 Qe7 27.Qe7 Be7+/– 28.Nf7 Rg6? 29.d5! Deflection: e6 29...Rf8 30.de6+– Re8 31.Rce3 Rf6 32.Kg2 Bf8 33.h3 Bg7 34.f4 Bf8 35.Kf3 c5 36.Re4 b5 37.bc5 Bc5 38.a4 Kb6 39.Ne5 Kc7 40.Nd7 Rf5 41.g4 Rd5 42.Nc5 Rc5 43.ab5 ab5 44.f5 Rc3 45.R1e3 Rc1 46.Rb4 Kc6 47.Reb3 Rc5 48.Kf4 Re7 49.h4 Rd5 50.Ke4 Rc5 51.Rb5! White has to consider giving back material. 51...Rb5 52.Rb5 Kb5 53.Kd5 Rg7 54.f6 Rg4 55.e7 Rg2 56.f7 Rd2 57.Ke6 Re2 58.Kf6 Rf2 59.Kg6 (59.Kg6 Kc4 60.f8Q Rf8 61.ef8Q h5 62.Qf3 Kb4 63.Kf6 Kc4 64.Ke5 Kc5 65.Qd5 Kb6 66.Kd6 Ka7 67.Qb3 Ka8 68.Kc6 Ka7 69.Qb7) 1–0. Jew,Harold (1840) – Smith,Maurice (1675), CAN–ch op Sackville, 2001.

4.a3 a5

5.b5 e6 6.c4 dc4 7.Bc4 Nbd7 8.d4 Nb6 9.Bd3 Bd3 10.Qd3 Qd5 11.Nf3 Na4 12.Bc1 (12.Qe2 Ne4=+) 12...Nc5!–/+ 13.Qc3 (13.dc5 Qd3) 13...Nb3–+ 14.Ra2 Nd4! (< 14...Nc1 15.Rb2 Na2 16.Qc7–/+) 15.Rd2 (15.Qd4 Qa2) 15...Nf3 16.gf3 Qf3 (16...Qb5?! 17.Rb2 Qd5 18.Qc7–+) 17.Qc7 (17.Rf1 Ne4 18.Qc7 Nd2 19.Bd2–+) 17...Qh1 18.Ke2 Nd5 19.Qb7 (19.Qc2–+) 19...Nf4! 20.ef4 Qb7 21.Bb2 Qe4 22.Kf1 Qb1 (23.Ke2 Rb8–+) 0–1. Slavisa2 – METEORA, Live Game Caissa's Web, 2004.

4.b5 e6

5.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6 5.b5).

5.Nf3 a6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 a6).

5.Nf3 c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7).

4.c4 Nbd7

5.Qb3 c5 6.b5 (6.cd5!? cb4 7.Qb4=) 6...e6=+ 7.Nf3 Bd6 8.Nc3 dc4 9.Bc4 Ne5 (9...Bg4 10.Be2=+) 10.Ne5 Be5 11.d4 (11.Rd1!?=) 11...cd4–/+ 12.ed4 (12.Rd1 Qb6 13.Ne2 Be4=) 12...Bd4 (12...Qd4 13.Rd1 Qg4 14.0–0–/+) 13.0–0–0 (better is 13.Rd1!? 0–0 14.0–0=+) 13...Qb6–+ 14.Na4 (14.Rd4 Qd4 15.Nd5 Qe4 16.Nc7 Kd7 17.Bf6 Kc7 (17...gf6?! 18.Na8 Qf4 19.Kd1–/+) 18.Bg7 Rhd8–+) 14...Bb2 15.Kb2? (better is 15.Qb2 Qc7 16.Rd4–+) 15...Qf2 16.Ka3 (16.Ka1 Bc2 17.Qb2 Qf5–+) 16...Nd7 (better is 16...Bc2 17.Qf3 Qf3 18.gf3 Bd1 19.Rd1–+) 17.Rhf1 Qc2 (better is 17...Qh4 18.Qc3 Nf6–+ (18...Qh2 19.Rf5 ef5 20.Bf7 Kd8 21.Qg7+–)) 18.Qb4? (better is 18.Qc2 Bc2 19.Rd2 Ba4 20.Ka4–+) 18...Nb6 (better is 18...Ne5 19.Rc1 Nc4 20.Qc4 Qc4 21.Rc4–+) 19.Nb2 (19.Bb3 Qg2 20.Qf4 Na4 21.Rf2–+) 19...Nc4 (better is 19...a6 20.ba6 Nc4 21.Nc4 Ra6 22.Na5 Qc7 23.Rf5 ef5 24.Re1 Kd8 25.Qd2 Qd7 26.Qd7 Kd7–+) 20.Nc4 a5 (20...Rd8 21.Nd6 Rd6 22.Rd6 Qg2 23.Qh4–+) 21.Nd6 Kf8–+ 22.Qe1 Qc5 23.Kb2–/+ Qc2 24.Ka1 a4 25.Qb4 25...Kg8 26.Rc1 Qg2 27.Nf5 ef5–/+ 28.Rf5 g6 29.Rfc5 Qh2 30.Qd4 Qh3?? 31.Rc7 a3 32.Rf7=+ Qh6 33.Rfc7 1–0. Zylla – Kausche, BS–Kreismeisterschaf, 1995.

5.Qb3 e6 6.Nf3 =+.

5.cd5 Nd5 6.Qf3 Be6 =.

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.c4).

4.d3 e6

5.a3 c5 6.c3 Be7 7.Nf3 0–0 8.Nbd2 Nbd7 (8...Nc6 9.Be2 cb4 10.ab4 Qb6 11.Qb3 Bd6 12.b5) 9.Be2 h6 10.Nb3 (10.0–0 Qc7 11.Nb3 b6 12.Nh4) 10...Rc8 (10...Qc7 11.0–0 b6 12.h3) 11.0–0 Qc7 (11...Qb6 12.Qd2) 12.h3 (12.bc5+=) 12...Rfd8 13.Rc1 c4 14.Nbd4 Bd3 15.Bd3 cd3 16.Qd3 Nb6 17.Nb5 (17.Nd2 Nc4 18.Nc4 Qc4–/+) 17...Qb8 18.Nd2 Nfd7 19.Qe2 a6 20.Nd4 Ne5 21.Ba1 Nec4 22.Nb1 Qc7 23.f4 Qd7 24.Rf3 Nd6 25.Nd2 Nbc4 26.Nc4 Rc4 27.Nb3 Ne4 28.Na5 Rc7 29.c4 b6 30.Nb3 Qa4 31.cd5 Rc1 32.Nc1 Qa3 33.Bb2 Qb4 34.Bd4 Qb1 35.Rf1 Rd5 36.Qa6 b5 37.Qb7? Bf6 38.Bf6 Nf6 39.Qc8 Kh7 40.Qb7 Qe4 41.Qa7 Rd2 42.Rf2 Qc2 43.Rd2 Qc1 44.Kh2 Qd2 0–1. Arcon,J (1660) – Metras,Dominique (1880), Provence–ch Majeur op, 1996.

5.a3 c5 6.bc5 Bc5 7.Nd2 0–0 8.Ngf3 Nc6 9.Be2 Bd6 10.Nh4 Bg6 11.Ng6 hg6 12.0–0 Rc8 13.c4 Bb8 14.Rc1 dc4 15.Rc4 Qd6 16.f4 Nd5 17.Rf3 e5 18.Ne4 Qe7 19.Qd2 b5 (better is 19...ef4!? 20.ef4 f5=) 20.Rc5+/– Ne3? (better is 20...Qd7 21.d4 ef4 22.Bb5 fe3+/–) 21.Qe3 a6 22.fe5 (22.Be5!? Ne5 23.fe5 Rc5 24.Nc5 Qe5+–) 22...Ba7 23.d4 1–0. Emerson (1815) – Sixty4 (1715), playchess.de, 2006.

5.a3 Bd6 6.Nf3 0–0 7.Be2 Nbd7 8.0–0 c6 9.c4 b6 (9...e5 10.Nc3=) 10.Nbd2 (10.cd5 cd5 (10...Nd5? 11.e4+–) 11.Nh4 Bg6=) 10...Qc7 11.Re1 (11.cd5 ed5 (11...Nd5? 12.e4+–) 12.Rc1 c5=) 11...dc4 (11...a5!?=) 12.Nc4+= c5? (better is 12...e5+=) 13.Nd6 Qd6 14.Qd2?? (better is 14.e4!?+–) 14...cb4 (14...e5 15.bc5 bc5 16.Qc3=) 15.ab4 (better is 15.e4 Be4 16.de4 Qd2 17.Nd2 ba3 18.Ba3+/–) 15...a6?? (better is 15...e5+=) 16.e4+– Bg6 17.e5 Qe7 18.ef6 Nf6 19.Ne5 b5 (19...Nd5 20.Bf3 Qb4 21.Qb4 Nb4 22.Ba8 Ra8+–) 20.Ng6 fg6 (20...hg6 21.Bf3+–) 21.Bf3 Rad8 22.Ra6 Rd6 23.Rd6 Qd6 24.Re5 Rd8 25.Rb5 Qd3 1–0. Tregubova,Anna – Slabunova,Anna, RUS–ch U12 Girls, 2004.

4.Ne2 e6

5.a3 c6 6.Ng3 Bg6 7.h4 h5 8.Be2 Nbd7 9.d3 (9.f4 a5 10.b5 Qb6=) 9...Bd6 10.f4 Qb6 11.Bd4 Qc7 (11...c5 12.bc5 Bc5 13.Bc5 Qc5 14.Kd2=+) 12.Nd2 (12.0–0!?=) 12...e5–/+ 13.fe5 Be5 14.Be5 Qe5 15.Ngf1 Ng4 (15...0–0 16.Nf3 Qc3 17.Kf2 Ng4 18.Kg3–+) 16.Bg4=+ hg4 17.Nb3 f5 18.Qe2 Qb2 19.Ng3 0–0–0 20.h5 f4 21.hg6 (21.ef4 Rde8 22.hg6 Re2 23.Ke2 Qc2 24.Nd2 Re8 25.Nge4 de4–+; 21.Qg4? Bd3!! (21...fg3?! 22.Qg6 Qc2 23.Nd2=+) 22.cd3 fg3–+ (22...Qb3?! 23.ef4 Qc3 24.Kf2–/+)) 21...fg3 22.Rh7 Rhf8 (23.Qd1 Rde8–/+) 0–1. Sotonyi,S – Andersson,Lars H, corr ICCF TT–4–90, 1991.

5.a3 Nbd7 6.Ng3 Bg6 7.c4 dc4 8.Bc4 Nb6 9.Be2 c6 10.0–0 Be7 11.d4 Ne4 (11...0–0 12.Nc3=) 12.Nh5 0–0 13.Nf4 Qc7 (13...Bf5 14.g4 Bg6 15.Ng6 fg6 16.Qc2=) 14.Ng6+= hg6 15.Bd3 f5 (better is 15...Nf6!?+=) 16.Be4+– fe4 17.Nd2 Bd6 18.h3 a5 19.Qg4 White fights for the Initiative 19...Qf7 20.Ne4 Be7 21.Nc5 Bc5 (21...Nc4 22.Qe2 b5 23.Rfd1+–) 22.bc5 Nd5 23.Rac1 Nf6 24.Qf3 g5 25.Qe2 Ne4 26.Qc2 Nf6 27.f3 g6 28.Bc3 Nd5 29.Bd2 Qd7? (29...Qf6 30.Rb1+–) 30.Rb1 Rf7 31.Rb3 Kg7 32.Rfb1 Ra7 33.Be1 Qd8 34.Bg3 Kh7 35.Qe4 Qe8 36.Qe5 a4 37.Rd3 Kh6 38.h4 Qe7 39.hg5 Kh7 40.Kf2 (40...Nf6 41.gf6+–) 1–0. Marklund,E – Olsson,T, corr SSKK lag–SM 1988, 1989.

4.Nf3 Nc6

5.a3 e5 6.Ne5+= Ne5 7.Be5 Ng4 (7...a5 8.b5+=) 8.Bb2 Qd7 9.Be2 0–0–0 10.d3 Bd6 11.h3 Ne5? (better is 11...Nf6!?+/–) 12.f4 Ng6 (better is 12...Qe7 13.g4 Nc6 14.gf5 Qe3+–) 13.Nd2?? (better is 13.g4 Be6 14.f5 Bg3 15.Kd2+–) 13...Rhe8 14.Bd4 (14.Nf1 Qe7 15.Bd4+/–) 14...b6?? 15.Nf3 c5+= 16.bc5 bc5 17.Bc3 Re3–/+ 18.Bd2 Re7 19.0–0 Nf4 20.Bf4 Bf4 21.Nh4 Be3 22.Kh1 Bh3 23.Bf3?? Rde8 24.c4 g5 25.Bd5? gh4 26.Qb3 Bg2! 27.Bg2 h3 28.Be4 Re4?? 29.de4?? Qg4–+ 30.Qe3 Qg2 0–1. Fournier,Frederic (1765) – alekhinevenez (1625), Active, 2006.

5.b5 Nb8 6.c4 e6 7.cd5 ed5 8.Be2 Be7 9.0–0 c6 10.Nd4 Bd7 11.Qb3 Qc7 12.bc6 Nc6 13.Nb5 Qb6 14.N1c3 a6 15.Nd6 1–0. Machete99 – CaptinCrunch, ICC, 2002.

4.Nf3 e5

5.b5 e4 6.Nd4 Bd7 7.c4 c6 8.cd5 cd5 9.Nc3 Bc5 10.Be2 a6 11.a4 Bd4 12.ed4 ab5 13.ab5 Ra1 14.Qa1 0–0 15.Qa7 Qc7 16.0–0 Bf5 17.Rc1 Qd7 18.h3 h6 19.Na4 Qd6 20.Bc3 White prepares b6 20...g5 (20...Bc8 21.Nc5 Nbd7 22.Ba5+= (worse is 22.Nb7 Qc7+=)) 21.Qb7 g4 22.hg4 Bg4 23.Bf1 Re8 24.b6 Re7 25.Qa7 Bd7? (25...Ra7 26.ba7 Double attack (26.ba7 Passed pawn)) 26.Qc7+– Ne8 27.Qd6 Nd6 28.Bb4 Ba4 (28...Re6 29.Nc5 Rg6 30.Nd7 Nd7 31.Bd6 Rd6 32.Rc8 Kg7 33.Rd8 Rb6 34.Rd7+–) 29.Bd6 Re8 30.b7 Bd7 31.Rc5 Kh7 32.Rd5 Bc6 33.Bb5 Bb5 34.Rb5 Rd8 35.Bb8 (35.Bb8 Rb8 36.Kh2+–) 1–0. pierre – bencare, chesshere.com, 2015.

5.b5 e4 6.Nd4 Bg6 7.Be2 c5 8.bc6 Nc6 9.0–0 Bd6 10.f4 ef3 11.Bf3 (worse is 11.gf3 Qc7 12.f4 Nd4 13.Bd4 Bc2+=) 11...Nd4 12.Bd4 Be7 (12...Qc7 13.Bf6 Bh2 14.Kh1 Bc2 15.Qe2 gf6 16.Rc1+=) 13.d3 0–0 14.Nd2 (14.Nc3 Re8+/–) 14...a6 15.Rb1 Qd7 16.Nb3 Rac8 17.Qe2 b5 18.Rfd1 Rfd8 19.e4 (better is 19.c3!?=) 19...de4–/+ 20.de4 Qc7 21.c3 Qc4 22.Qe3 Nd7 23.Rb2 Nc5 24.Be2 Qe6?? Increasing the pressure on the isolated pawn on e4 (better is 24...Qa4 25.Nc5 Rc5=) 25.Nc5+– (worse is 25.Bc5 Rd1 26.Bd1 Qb3 27.ab3 Bc5+=) 25...Rc5? (25...Qc6 26.Nd3 Qe4+–) 26.Bc5 Rd1 27.Bd1 1–0. Casny,Guenter (1730) – Ulrich,Gert, Brandenburg Seniors op, 2006. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 Nf6 4.e3 e5)

5.Ne5 Bb4 6.c4 0–0 7.Bd3 (7.Qb3 Qe7=) 7...Bd3+= 8.Nd3 Nc6 9.Nb4 Nb4 10.Qb3 Qd6 (10...c5 11.cd5 Qd5 12.0–0+=) 11.a3 Nc6 12.cd5 (12.Qb7? Rab8 (12...dc4?! 13.Bf6 Rab8 14.Qa6+=) 13.c5 Qc5 14.Qc7 Rfc8–+) 12...Nd5 13.0–0 (13.Qb7? Rfb8 14.Qa6 Rb2–+) 13...Rae8 14.Nc3 (14.Qb7? Rb8 15.Be5 Rb7 (15...Qe5?! 16.Qc6 Ne3 17.fe3 Qa1 18.Nc3–+) 16.Bd6 cd6–+) 14...Nde7 15.Ne4 (15.Qb7? Rb8 (15...Qd2 16.Rad1 Qc2 17.Ba1+=) 16.Qa6 Rb2–+) 15...Qe6 16.Qc3 Threatening mate... how? 16...Nf5 (16...Qg6 17.Nc5 Nd5 18.Qc1+=) 17.Ng3 (better is 17.Nc5!? Qg6 18.f4+/– (18.Nb7 Nh4 19.g3 Nf3 20.Kh1 Nce5–/+)) 17...f6= 18.Nf5 White gets the initiative 18...Qf5 19.d4 Rf7 20.Rfc1 Nd8 21.Qb3 c6 22.Rc5 Qe4 23.Ra5 b6 (23...a6!?+=) 24.Ra7+/– b5 (24...Qe6 25.Qe6 (worse is 25.Qb6 Ra7 26.Qa7 Qb3+=) 25...Ne6 26.Rf7 Kf7 27.f3+/–) 25.a4+– Qe6 26.Qe6 Ne6 27.ab5 cb5 The passed pawn on d4 quickly leads to threats 28.Rf7 (28.R7a5 Rb7+/–) 28...Kf7+/– 29.Ra7 Re7 30.Re7 Ke7 31.Ba3 Kd7 32.d5 Nc7 33.e4 (33.e4 Na6 34.Bf8+/–) 1–0. Sternik,Ryszard – Lange,Wilfried, corr Matteus Chess, 1999.

5.Ne5 Bb4 6.Bd3 Bd3 7.Nd3 Bd6 8.0–0 0–0 9.f4 Nc6 10.Ne5 Re8 11.Ng4 (11.Nc6 bc6 12.Nc3 Qd7=) 11...Be7+= 12.Qf3 Ng4 13.Qg4 Bf6 14.Bf6 Qf6 15.c3 Rad8 16.Na3 Ne7 17.Nb5 (17.Rab1 Qa6 18.Nb5 Qa5=) 17...c6 18.Nd4 Qg6 19.Qg6 hg6 20.a4 Nf5 21.Nf5 gf5 22.a5 Rb8 23.Rfb1 Re7 24.Rb2 b5 25.ab6 ab6 26.Rba2 g6 27.Ra7 (27.Kf2 b5+=) 27...Kf8 (27...Ra7 28.Ra7 b5 29.Rc7=) 28.Re7 (28.R7a6 c5+=) 28...Ke7= 29.Ra7 Ke6 30.Rc7 c5 31.Kf2 c4 32.Ke2 b5 33.Ra7 b4 34.cb4 Rb4 35.Ra6 Ke7 36.Ra7 Ke6 37.Ra6 (37.Ra6 Ke7 38.Ra8=) 1–0. Fournier,Frederic (1860) – Bellahcene,Omar (1800), Open vermeulen avril, 2004.

4.Nf3 g6

5.c4 dc4 6.Bc4 Bg7 7.0–0 0–0 8.d4 Nc6 9.a3 e6 10.Nc3 a6 11.Bd3 Bg4 (11...Bd3 12.Qd3 Qd6 13.Rfd1=) 12.h3+= Bf3 13.Qf3 (13.gf3?! e5 14.de5 Ne5+=) 13...Rb8 14.Ba6 (14.Rad1 Qd7+/–) 14...ba6? (better is 14...Nd4!? 15.ed4 ba6=) 15.Qc6+/– Rb6 16.Qc4 Nd5 17.Nd5 (17.Rac1 Ne7+–) 17...ed5+/– 18.Qc5 Rf6 19.Rac1 c6 20.Qa7 Re8 21.Qa6 Qd7 22.Qe2 Re4 23.Rc5 Bh6 24.Bc1 Qe6 25.b5 Rd4?? 26.bc6 Rc4 27.Rc4 dc4 28.c7 Qc6 29.Bb2 Re6 30.Rc1 Qc7 31.Qc4 Qc4 32.Rc4 Bf8 33.Rc8 Rb6 34.Bd4 Rb1 35.Kh2 Rb5 36.a4 Ra5 37.Kg3 f5 38.Rc4 Bd6 39.Kf3 g5 40.Ke2 h5 41.f3 g4 42.hg4 fg4 43.fg4 hg4 44.e4 Bf4 45.Bb6 Re5 46.a5 1–0. Fournier,Frederic (1925) – jlopes, Active, 2011.

5.c4 Nc6 6.a3 (6.cd5 Qd5 7.Nc3 Qd8 8.Qb3 a6 9.e4 Be6 10.Bc4 Bc4 11.Qc4 e6 12.b5 Na5) 6...dc4 7.Bc4 (7.Bf6 ef6 8.Bc4 Bd6 9.Nc3 0–0 10.d4 Re8 11.0–0 Qd7 12.Qd2 Bg4) 7...Bg7 (7...e6 8.Nc3 Bg7 9.0–0 0–0 10.d4 a6 11.Nh4 Be4 12.g3 Qd7; 7...Bh6 8.d4 e6 9.Nc3 0–0 10.0–0 Qd6 11.d5 ed5 12.Nd5 Nd5; 7...Bd3 8.Qb3 Bc4 9.Qc4 Bg7 10.Nc3 0–0 11.0–0 a6 12.d4 Qd6) 8.Qb3 (8.Nc3 0–0 9.0–0 Ne4 10.Qe2 Nd6 11.Bb3 Qd7 12.d4 Ne4) 8...0–0 9.d3 (9.0–0 a6= (9...Qd7 10.Nc3 Bd3 11.Ne2 Bc4 12.Qc4 Qd5) 10.Nc3 Qd6 11.d4 b5 12.Be2 Ne4) 9...a6 10.a4 (10.e4 Bg4 11.Nbd2 e6 12.h3 Bf3) 10...a5 (10...Ne8 11.e4 (11.Bg7 Kg7 12.Qc3 Nf6) 11...Bb2 (11...Be6 12.Be6 fe6) 12.Qb2= Be6) 11.b5 (11.e4 Bg4 12.b5 Bf3) 11...Nb4 12.e4 (12.Ra3 Nd7+= (12...Ne8 13.Bg7 Ng7=)) 12...Be6=/ + 13.Ra3 Bc4 14.Qc4 Rc8 15.0–0 c6 16.Rb3 (16.Bc3 Nh5=) 16...cb5 17.Qb5 b6 18.Bd4 Nd7 19.e5 (19.Bg7 Rc5 20.Bf8 Rb5 21.ab5 Kf8+=) 19...Nc5 20.Rc3 Nd5 (20...Rb8 21.Bc5 bc5 22.Qc5 Nd3 23.Qe3+=) 21.Rc2 (21.Rc4 Nf4 22.Rd1 Ne2 23.Kh1 Nd4 24.Rd4 Qc7=) 21...Nf4=/+ 22.Rd1 (22.Bc5 Qd3 23.Be3 Qb5 (23...Qc2?! 24.Bf4 Rfd8 25.Nbd2=) 24.ab5 Rc2 25.Bf4 Rfc8+=) 22...Nd7 (22...Qd7!? 23.Qd7 Nd7 24.Rc8 Rc8–/+) 23.Rb2 Rb8 (23...Ne5!? 24.Be5 Be5 25.Qe5 Nd3+=) 24.Be3+/= Ne6 25.d4 Nc7 Ne5=/+ 27.Ne5 Be5 28.Rc1 Bd6–/+ 29.Rb3 Qd7 30.Nd2 Rfc8–+ 31.Rbc3 Nd5! 32.Qc8 Rc8 33.Rc8 Kg7 34.R1c4 Bb4 35.Nf1 Qa4 36.Bd2 b5 37.Rc2 Bd2 38.Rd2 b4 39.Ne3 Nc3 40.d5 Qb5 41.Kh1 a4 42.Rb2 a3 43.Rd2 a2 44.Nc2 b3 45.h3 bc2 46.Rc2 a1Q 47.Kh2 Ne2 48.Rc1 Nc1 49.Ra8 Qe5 50.g3 Qf1 51.Rg8 Kg8 52.h4 Qf2 53.Kh3 Qeg3# 0–1. Hussein,Naaman – Abdullah,Mansoor, Asia–chT fin, 1986.

5.c4 Bg7 6.Nc3 c6 7.Qb3 0–0 8.Be2 a5 9.a3 (9.ba5 Bc8+=) 9...Nbd7 (9...dc4 10.Qc4 ab4 11.Qb4=) 10.0–0 (10.cd5 cd5 11.Nd5 Nd5 12.Bg7 Ne3 13.fe3 Kg7+=) 10...Nb6 (10...dc4 11.Qc4 Nb6 12.Qd4=) 11.c5 a4 (11...Nc4 12.d4 (< 12.Bc4 dc4 13.Qa4 Bd3=+) 12...Nb2 13.Qb2=) 12.Qa2 (12.Qd1!? Nc4 13.Na4 Nb2 14.Nb2+/–) 12...Nbd7 13.d3 e5 14.Rad1 (14.Qb1 Qe7+=) 14...e4 (14...Qe7 15.Qb1=) 15.Nd4 (15.de4 Ne4 16.Ne4 Be4 17.Bg7 Kg7 18.Nd2+/–) 15...Bg4 (better is 15...ed3 16.Bd3 Bd3 17.Rd3 Ne5=) 16.Bg4+/– Ng4 17.de4 de4 18.Ne4 Nde5? (better is 18...Nh2 19.Rfe1 Ng4+–) 19.h3 Nf6 20.Nd6 Qd7?? 21.Ne2 Nf3?! 22.gf3 Qh3 23.Ng3 Nh5 24.Bg7 Ng7 25.Nde4 Rae8 26.Nf6 Kh8 27.Ne8 Re8 28.Qb2 Qe6 29.Rd6 Qe7 30.Rfd1 Qg5 31.Kf1 Kg8 32.Ne4 Qh4 33.Nf6 Kf8 34.Ne8 Qh1 35.Ke2 Qh5 1–0. Fredek (2090) – Okatte, Freundschaftspartie, 5m + 0s, 2006.

5.c4 Bg7 6.h3 0–0+= 7.g4 Be4 8.d3 Bf3 9.Qf3 e6 (9...Nc6 10.b5 Na5 11.g5=) 10.Nd2 c6 11.Rd1 (11.Be2 Nbd7+=) 11...Nbd7+= 12.h4 Ne4 (12...a5 13.b5+=) 13.Bg7= Nd2 14.Rd2 Kg7 15.d4 Qf6 16.Qg3 (16.Qf6!? Nf6 17.cd5 Nd5 18.h5=) 16...Qe7+= 17.c5 e5 18.g5 ed4 19.Rd4 Qe5 (19...Ne5!? 20.f4 Nd7+=) 20.Qe5= Ne5 21.Be2 h5 (21...b6 22.cb6 ab6 23.f4=) 22.gh6 Kh6 23.f4 Nd7 24.h5 f5 25.hg6 Kg6 26.Kf2 Rh8 27.Rdd1 Rh1 28.Rh1 Nf6 ½–½. Santana,Cleiton M (1800) – Bueno,Marcos AF (1760), 17th Memorial Francisco Alves – Aberto, 2013.

4.f4 a6

5.c4 e6 6.c5 Be7 7.Nf3 Ng4 (7...a5!? 8.a3 0–0=+) 8.Be2 (8.Bg7 Rg8 9.Bd4 Be4+=) 8...h5 (8...Bf6 9.Nd4 Nh6 A) 10.Nf5? Bb2 (10...Nf5?! 11.Nc3=+; 10...ef5?! 11.Nc3+=) 11.Nh6 Ba1–+ (< 11...gh6 12.Nc3–/+); B) 10.0–0=) 9.0–0 (9.Bg7 Rg8 10.Bc3 Bf6+/–) 9...Nd7 (9...a5 10.a3+=) 10.h3 Ngf6 11.d3 c6 12.Nbd2 b6 13.d4 b5 14.Ne5 Ne5 15.de5 Ne4 16.Ne4 Be4 17.Bh5 a5 18.a3 ab4 19.ab4 Ra1 20.Ba1 Qa8 21.f5 Bf5–/+ 22.g4 Rh5 23.gh5–/+ Bh3 24.Rf2 Qa3 25.Bd4 Qb4 26.Qa1 Bd8 27.Rh2 Bf5 28.h6 gh6 29.Rh6 Qb1 30.Qb1 Bb1 31.Kf2 Bc2 32.Ke2 b4 33.Kd2 Bg6 34.Kc1 Kd7 35.Rh8 Bc7 36.Ra8 f6 37.Ra7 f5= 38.Rb7 Bh5 39.Rb4 Be2 40.Rb2 Bg4 41.Rh2 Ba5 42.Rh7 Kd8 43.Kc2 Bf3 44.Bc3 Bd1 45.Kd2+/– Bc3 46.Kc3 (46.Kc3 Bg4 47.Rh8 Ke7 48.Kb4+/–; < 46.Kd1 Be5 47.Ra7 Bg3=+) 1–0. Schiffler – Kunz, Grethen (71 moves), 1950.

5.Nf3 e6 6.a3 Be7 7.c4 dc4 8.Bc4 0–0 9.d4! Nd5? 10.Qe2! Bg4 11.0–0 Nd7 12.h3 Bf3 13.Rf3 N7b6 14.Bd3 f5? 15.e4! Nf6 16.ef5 ef5 17.Bf5 Kh8 18.Be6? Na4! 19.f5 c6 20.Rd3 Nb2 21.Qb2 Nd5 22.Nd2 Nf4 23.Re3 Bf6 24.Nf3 Qb6 25.Re4 Nh5 (25...Ne6!) 26.Qf2 Qc7 27.Ne5 g5 28.Nd7 Rfd8 29.Ne5 (29.g4? Nf4 30.Rf4 Rd7!) 29...Rf8 30.g3 Rad8 31.Rae1 Ng7 32.Qe3 Qe7 33.Kg2 Ne6 34.fe6 Kg8 35.Nf7 Rd5 36.g4 Kg7 37.Rf1 h6 38.h4 b5 39.Rf5 Rf5 40.gf5 Qc7 41.hg5 hg5 42.Ng5 Rh8 43.Nf3 Kf8 44.e7 Be7 45.Ne5 Rg8 46.Ng6 1–0. Schiffler – Kunz, 1951.

4.f4 Nc6

5.a3= a6 6.Nf3= Qd7 (6...h5 7.Bd3 Qd7 8.Nc3 h4 9.Ne5 Ne5 10.fe5 Ne4) 7.Be2 0–0–0 8.Ne5 Ne5 9.fe5 Ng4 10.0–0 h5.

5.a3= Qd6 6.Nf3 e6 (6...a6 7.Bd3 Qd7 8.0–0 g6 9.Bf6 ef6 10.Nc3 0–0–0; 6...Rd8 7.Nc3 a6 8.Bd3 g6 9.0–0 d4 10.ed4 Nd4) 7.Nc3 a6 8.Bd3 d4 9.Ne2 de3 10.de3 0–0–0.

5.a3= Ne4 6.Nf3 Bg4 (6...Nd6 7.Be2= (7.Bd3 e6 8.0–0 Be7 9.Bg7 Rg8 10.Bf5 Nf5) 7...e6 8.0–0 a6 9.Nd4 Nd4 10.Bd4 Be7; 6...Qd6 7.Nc3 h5 8.b5 Na5 9.d3 Nf6 10.Nd4 Bd7; 6...a6 7.Nc3 Qd6 8.Bd3 0–0–0 9.Nh4 e6 10.0–0 Be7; 6...e6 7.Nc3 Be7 8.b5 Na5 9.Ne4 de4 10.Nd4 0–0) 7.Nc3 (7.Be2 Nd6= (7...e6 8.Nc3 Bd6 9.0–0 Qf6 10.b5 Ne7) 8.0–0 Nc4 9.Bc4 dc4 10.Qe2 e6) 7...Bf3 (7...a6!?= 8.Bd3 Nc3 9.Bc3 d4 10.ed4 Nd4; 7...Qd6 8.Bd3 Nc3 9.Bc3 0–0–0 10.b5 Nb8) 8.Qf3+= Nc3 9.Bc3 e6 (9...a6 10.Bd3 Qd7) 10.b5 (10.Be2 Qh4 11.Qf2 Qf2 12.Kf2 f6+=) 10...Ne7 11.Bd3 Qd7 12.a4 b6 (12...Nf5 13.0–0+=) 13.0–0 (13.a5 Rd8+/–) 13...c6 (13...c5 14.bc6 Nc6 15.f5+/–) 14.f5 (better is 14.a5+/–) 14...cb5?? (better is 14...ef5 15.bc6 Nc6 16.Bf5 Qd6+/–) 15.f6+– (15.ab5?! Nf5 16.Bf5 ef5 17.Qf5 f6+/–) 15...gf6 (15...Nc6 16.fg7 Bg7 17.Bg7 Rg8+–) 16.Bb5 (16.ab5?! Bg7+/–) 16...Nc6 17.Qf6 (17.Bf6?! Rg8+–) 17...Rg8 (17...Rc8 18.Qh8 Qe7+–) 18.Bc6 Qc6 19.Qf7 Kd8 20.Qg8 Kd7 21.Rf7 Kd6 22.Qg3 Kc5 23.Qf4 Bd6 (23...b5 24.Qd4 Kd6 25.Bb4 Qc5 26.Qc5 Ke5 27.Qd4) 24.Qb4# 1–0. Trokenheim,Marek (2175) – Kaeser,Werner (1905), remoteschach.de, 2010.

5.a3= g6 A) 6.Nf3 Qd6 (6...e6 7.Nc3 Bd6 8.b5 Na5 9.Bd3 0–0 10.0–0 c5; 6...Bg7 7.Bd3 Bd3 8.cd3 0–0 9.0–0 a6 10.Nc3 Qd7) 7.Be5 Qd7 8.Nc3 Bg7 9.Bb5 0–0 10.0–0 a6; B) 6.b5 Na5 7.Bf6 ef6 8.Nf3 Bc5 9.Bd3 Qd7 10.Nc3 0–0; C) 6.Bd3 Bg7 (6...Qd7 7.Nf3 Bg7 8.b5 Na5 9.Ne5 Qd6 10.Nc3 Nd7) 7.Nf3 a6 8.0–0 Bd3 9.cd3 0–0 10.Nc3 Qd7.

4.f4 Nbd7

5.Nf3 e6 6.a3 Be7 7.c4 (7.Be2 a5=+) 7...dc4 8.Bc4 Nb6 9.Be2 Ne4 (9...a5!?=+) 10.0–0 Bf6 11.Nd4 Bg6 (11...Nd5 A) < 12.Nf5 Bb2 (12...ef5?! 13.Qc2=) 13.Ra2 Bf6–/+ (< 13...ef5 14.Rb2 0–0 15.Bc4=); B) 12.Qc1=) 12.d3 Nd6 13.e4 (better is 13.Bf3=+) 13...Be7?? (better is 13...Nf5 14.e5 Ne3–/+) 14.f5+– Bf6? (better is 14...e5!? 15.Nb3 Bf5 16.ef5 Nd5+–) 15.fg6 hg6 16.Qb3 (16.Bc3 Rc8 17.Nc6 bc6 18.Bf6 gf6=) 16...Ne4 17.Ne6! Qd6 (17...fe6 18.de4) 18.Nf4?? (better is 18.de4 Qh2 19.Kf2 Bb2 20.Nc7 Qc7 21.Qb2 Qf4 22.Ke1 Qg3 23.Kd1 Rd8 24.Nd2+–) 18...Bd4–+ 19.Kh1 (19.Rf2 Bf2 20.Kf1 Qf4 21.de4 Bd4 22.Bf3 Bb2 23.Qb2 Rh2 24.Ke2–+) 19...Ng3# 0–1. Gross,Wilhelm – Merten,Rainer, xix, 1990.

5.Nf3 Ng4 6.Nd4+= Nh6 7.Nf5 Nf5 8.Bd3 e6 9.Bf5 ef5 10.a3 (10.0–0 Qh4+=) 10...Qh4= 11.g3 Qh3 12.Qf3 c6 13.Nc3 Nf6 14.Ne2 Be7 15.Ng1 Qh6 16.h3 Qg6 17.Qg2 (17.Ne2 a5=+) 17...Ne4 18.g4? (better is 18.Ne2=+) 18...Bh4–+ 19.Kd1 Nf2 20.Kc1 Nh1 21.Nf3 Bf6 22.Bf6 Qf6 (22...gf6?! 23.Nh4 Qg8 24.Nf5–/+) 23.c3 a5 24.Rb1 ab4 25.ab4 0–0 26.Qh1 b6 27.Ne5 Rfd8 28.Qg2 Ra7 29.gf5 Rda8 30.Qg5–/+ Qd6 31.Qg2? f6–+ 32.Nf3 c5 33.h4 Ra1 34.Ra1 Ra1 35.Kb2 Ra7 36.b5 c4 37.Nd4 Qa3 38.Kc2 Qa1 39.Qd5+/– Kf8 40.Ne6+– Ke8?? 41.Qd8 Kf7 42.Qf8# 1–0. Finenko – Borisiuk, USSR, 1990.

4.a3 Nbd7

5.c4 c6 6.Nf3 e6 7.Nc3 Be7 8.Be2 dc4 9.Bc4 Nb6 10.Be2 0–0 11.d4 Nfd5 12.0–0 Rc8 13.Rc1 Bd6 14.Bd3 Bd3 15.Qd3 Qe7 16.Ne4 Nd7 17.Nd6 Qd6 18.e4 Ne7 19.Qc4 Rfd8 20.Rfe1 Nb6 21.Qc5 Na4 22.Qc2 Nb2 23.Qb2 Qb8 24.Rc5 Rd7 25.b5 cb5 26.Qb5 Rcd8 27.Rec1 b6 28.Rg5 h6 29.Rg4 Ng6 30.g3 Rc7 31.Rc7 Qc7 32.Qb2 Qd7 33.Qb3 Kh7 34.e5 Qd5 35.Qc3 Kh8 36.Qc7 Qd7 37.Qc3 Rc8 38.Qa1 Qd5 39.Nh4 Nh4 40.Rh4 Rc2 41.Qe1 Qc6 42.Qe4 Qe4 43.Re4 Rc4 44.Kg2 Ra4 45.Re3 Rd4 46.Rc3 Rd7 47.h4 h5 48.Kf3 g6 49.Rc8 Kg7 50.Ke3 Rd5 51.f4 Ra5 52.Rc3 Kf8 53.Kf3 Rc5 54.Rd3 Ke7 55.Ke3 Rc7 56.Ke2 Rd7 57.Rc3 Kd8 58.Ke3 Rc7 59.Rb3 Kc8 60.Rd3 Kb7 61.Rb3 Rd7 62.Rc3 Ka6 63.Rc4 Ka5 64.Ke2 Kb5 65.Rb4 Kc5 66.Ke3 b5 67.Rb3 a5 68.Rc3 Kb6 69.Rb3 Rc7 70.Rd3 0–1. Spiegel – Wimmer, corr 1987.

5.c4 e5 6.Nf3 e4 7.Nd4 Bg4 8.Qb3 c5 9.Nc2 Be6 10.Nc3 Nb6 11.cd5 Nbd5 12.Bb5 Ke7 13.Nd5 (13.Bc4 Rc8+=) 13...Nd5 (13...Bd5 14.Bc4 Bc4 15.Qc4+=) 14.bc5+= Nf4? (better is 14...Rc8+=) 15.Qb4+– a5? (better is 15...Nd3 16.Bd3 ed3 17.Qb7 Ke8 18.Qc6 Ke7+–) 16.Qe4 Ng6 (16...Nd5 17.Nd4 Qc7 18.Nf5 Kd8 19.Ng7 Bg7 20.Bg7 Rg8+–) 17.Qb7 (17...Bd7 18.Bd7+–) 1–0. Kuchta,Danuta – Aksiuczyc,Monika (2070), Poland–ch U20 Girls, 1994.

5.Nf3 c6 6.d4 e6 7.Bd3 Bd3 8.Qd3 Ne4 9.Nbd2 Ndf6 10.Ne4?? (better is 10.c4=) 10...de4–+ (10...Ne4?! 11.0–0=) 11.Qe2 ef3 12.Qf3 Be7 (12...Qd5 13.Qg3–+) 13.c4 0–0 14.0–0 a5 15.b5 cb5 16.cb5 Qd7 17.a4 Rfc8 18.Rac1 Rc1 19.Rc1 Rc8 20.Rc8 Qc8 21.Qe2 Bb4 22.g3 b6 23.Kg2 Qb7 24.f3 Nd5 25.e4 Nc3 26.Bc3 Bc3 27.Qc4 Bb4 28.d5 ed5 29.ed5 Kf8 30.Qe4 g6 31.Qe5 Qd7 32.Qh8+= Ke7 33.Qe5 Kd8 34.Qb8 Ke7 35.Qe5 Kd8 36.Qb8 Ke7 37.Qe5 ½–½. Fournier,Frederic (1750) – gonzaloya (1790), Active, 2007.

5.Nf3 e6 =.

5.d4 e6=+

6.c4 dc4 7.Bc4 Nb6 8.Ba2 Be7 9.Nc3 0–0 10.Nge2 c6 11.0–0 Qc7 12.Ng3 Bg6 13.Nce2 Rad8 14.Rc1 h5 (better is 14...Nbd5!?=) 15.Nf4+= h4 16.Nge2 (better is 16.Ng6!? hg3 17.Nf8 gh2 18.Kh1 Kf8 19.g3+/–) 16...Bh7 17.Be6 (17.b5 e5 18.Nd3 Ng4=) 17...g5+= (17...fe6?! 18.Ne6 Qd6 19.Nf8 Rf8 20.f3=) 18.Bf7 Kf7 19.Qb3 Nbd5 20.Nd5 Nd5 21.Nc3 Qd7 (21...Bd6!? 22.e4 Bh2 23.Kh1 Be4 24.Ne4 Bf4=) 22.e4+= Ke8 23.ed5 cd5 24.a4 Bd3 (better is 24...h3 25.Nb5 Be4 26.Nc7 Kf7+/–) 25.b5?? (25.Nd5!? Qd5 26.Qd3 Bb4 27.Rc7+–) 25...h3 (better is 25...Qf5 26.h3 Bc4+=) 26.Rfe1+/– Qf5 27.Nd1 hg2 28.Ne3?? Qf2 0–1. Bopeep – Snicks, ChessWorld.net, 2012.

6.Bd3 Bd3 7.Qd3 Bd6 8.Nf3 0–0 9.c4 c5 (better is 9...dc4 10.Qc4 a5+=) 10.bc5 dc4 11.Qc4 Bc7 12.Nbd2 Rc8 13.0–0 Nb8 14.Qe2 b6 15.cb6 Bb6 16.Rfc1 Qe7 17.Rc8 Rc8 18.Rc1 Qd7 19.Ne5 Rc1 20.Bc1 Qc7 21.Qd1 Nbd7 22.Ndf3 Ne4 23.Nd7 Qd7 24.Ne5 Qc7 25.f3 Nc3= 26.Qd2 Nd5 27.Bb2 f6 28.Nd3+/– Qc4 29.Kf2 e5 30.de5?? fe5?? 31.Ne5?? Qb3?? 32.Nd7?? Be3–+ 33.Qe3 Ne3 (33...Ne3 34.Bd4 Nd1 35.Kg3 Qd3–+; 33...Qb2?! 34.Qe2 Qd4 35.Ke1 Qa1 36.Qd1 Qd1 37.Kd1 Ne3 38.Ke1 Ng2 39.Kf2=) 0–1. Fournier,Frederic (1625) – Katakrov, Active, 2007.

6.Ne2 Bd6 7.Nd2 (7.Ng3 Bg6=+) 7...a5 8.ba5 (8.c4 0–0=+) 8...Ra5 (8...0–0 9.Ng3=+) 9.Ng3 Qe7 (9...Bg6 10.c4=+) 10.Nf5= ef5 11.c4 Ba3 (11...f4 12.Nb3 Ba3 13.Na5 Qb4 14.Qd2 Qb2 15.Qb2 Bb2 16.Ra2 Bc3 17.Kd1+/–) 12.Bc3 (12.Qb3 Bb4 13.Ra5 Ba5=) 12...Ra7= 13.Bd3 (13.Qb3!? 0–0 14.cd5=) 13...f4=+ 14.0–0 0–0 (14...fe3 15.Re1 0–0 16.Re3=) 15.ef4= Rfa8 16.Re1 Qf8 17.c5 b6 18.cb6 Nb6 19.Qb3 Bd6 20.Ra7 Ra7 21.g3 Qa8 22.Bb4 Bf8 23.Nf3 c5 24.dc5 Nbd7= 25.Qc2 h6 26.Ne5 Nc5= 27.Bc5 Rc7 28.g4 Bc5 29.g5 hg5 30.fg5 Bd6 31.Qb2 Nd7 32.Nd7 Rd7 33.Qd4 g6 34.Kg2 Re7 35.Ra1 Qc8 36.Ra4 Re5 37.h4 Bc7 38.Qc5 Re4 39.Re4 de4 40.Be2 Qd7 41.h5 gh5 42.Bh5 Bf4 43.Qc4 Qe6 44.Qe6 fe6 45.Bg6 e3 46.fe3 ½–½. Luzuriaga,Norberto Horacio – Poschmann,Hans, TT–01.17 TSC, 2001.

5.Nf3 h6

6.c4 e6 7.Be2 Be7 8.Nc3 (8.cd5 Nd5 9.0–0 a5=) 8...dc4 9.Bc4 Nb6 10.Be2 0–0 11.0–0 Nfd7 12.d4 Nd5 13.Re1 Bf6 14.Qb3 c6 15.a4 N7b6 16.a5 Nc3 17.Bc3 Nd5 18.Bb2 a6 19.Rac1 Re8 (19...Be7 20.Ba3=) 20.Bc4+= Be4 21.Nd2 Bh7 22.e4 Nc7 23.e5 (23.Nf3 Nb5+=) 23...Be7 24.Bd3 (better is 24.Ne4=) 24...Bd3–/+ 25.Qd3 Bb4 26.Bc3 Bc3 27.Rc3 Nb5–+ 28.Rc4 Qa5 29.h3 Rad8 30.Re4 Rd5 31.Rh4 Red8 32.Ne4 Qa1 33.Kh2 Kf8 34.Nf6 Rd4 35.Nh7 Ke7 36.Rcd4 Rd4 37.Rd4 Qd4 38.Qg3 g5 39.Ng5 hg5 40.Qg5 Kd7 41.Qf6 Kc7 42.Qf7 Qd7 43.Qd7 Kd7 0–1. Serowy,Reinhold – Sube,Guenter (1700), Brandenburg Seniors op, 2003.

6.h3 e6 7.g4!? Be4 8.Nc3 c5 9.bc5 Bc5 10.Ne4 de4 11.Ne5 Ne5 12.Be5 Qd5 13.Bf6 gf6 14.Bb5 Ke7 15.Qe2 Rhd8 16.Rg1 a6 17.Bc4 Qe5 18.Ra2 b5 19.Bb3 Qh2 20.Qf1 Qd6 21.c4 Ba3 22.cb5 Bb4 23.Qe2 ab5 24.Ra8 Ra8 25.Kf1 Qd3 26.Bd1 Ra1 27.Ke1 Ra2 28.Kf1 Bd2 29.Rg3 Ra1 30.Kg2 Bc3 31.Qd3 ed3 32.Bb3 Be5 33.f4 Bd6 34.e4 d2 35.Kf2 d1Q 0–1. marus – KamaoaKid, internet, 2001.

4.a3 e6

5.Bb5 c6=+ 6.Be2 Nbd7 (6...c5 7.bc5 Bc5 8.Nf3=) 7.Nf3= Be7 (7...Bd6 8.Nd4=) 8.Nd4 (8.Nh4 Be4=+) 8...Bg6 9.0–0 0–0 (9...e5 10.Nf3 Bd6 11.d4=) 10.Nf3 (10.f4 a5=) 10...Qb6 (10...a5 11.b5=) 11.c4 (11.Nh4 Be4=+) 11...c5=+ 12.cd5 (12.b5 Rfd8=+) 12...Nd5 13.b5 (13.Nc3 cb4 14.Nd5 ed5=+) 13...a6 14.a4 ab5 15.ab5 Ra1 16.Ba1 Nc7 (16...Rd8 17.Nc3=+) 17.Nc3= Nf6 (17...Rd8!?=) 18.Ne5+= Nfd5? (better is 18...Qd6 19.Ng6 fg6+=) 19.Nd7+– (19.Ng6?! fg6 20.Na4 Qd6=) 19...Qd6 20.Nf8 Bf8 21.Qb3 Qb6 22.Na4 Qd6 23.Bf3 Bd3?? 24.Qd3+– (24...b6 25.Be4+–) 1–0. OutOfBounce – andrewsatool, Live Game Caissa's Web, 2005.

5.c4 a5 6.b5 =+.

5.c4 c6 6.cd5 ed5 7.Nf3 Bd6 8.Be2 Nbd7 9.0–0 0–0 10.d3 Qc7 11.h3 Rae8 (11...a5 12.b5=+) 12.Nbd2= a5 13.Qb3 (13.Qa4 Ra8 14.b5 Qb6=) 13...h6 (13...Ra8 14.b5=+) 14.Rfe1 (14.ba5 Qa5 15.Bf6 Nf6 16.Qb7 Qa4=) 14...Be6 (14...Ra8 15.b5=) 15.Nd4+= ab4 16.Ne6 (16.ab4 Bh2 17.Kh1 Bd6+=) 16...fe6= 17.ab4 Nh7 (17...Qb6 18.Bd4 Qb4 19.Qc2=) 18.f4 (18.Bh5 Rd8=) 18...Qb6 (18...Nhf6!?=) 19.Bd4+= Qb4 20.Qc2 (better is 20.Qa2 e5 21.Reb1 ed4 22.Rb4 Bb4 23.e4+=) 20...Ra8?? (20...e5!? 21.Reb1 ed4 22.Rb4 Bb4+=) 21.Rab1 Qa5 22.Rb7+– Nhf6 23.Reb1 Qa4 24.Qc1 c5 25.Bc3 d4 26.ed4 cd4 27.Ba1?? Bf4–+ 28.Qb2? Be3 29.Kh1 Rae8?? 30.Bd1 Qc6 31.Bf3 Qc5 32.Ne4? Ne4–+ 33.Be4 Nf6 34.Bg6 Re7 35.Rb5–/+ Qc7 36.Qa2?? Nd5 37.Qa4?? Nc3–+ 38.Bc3 Qc3 39.R5b2?? Qc7 40.Qd1–/+ Qf4 41.Be4 Ref7 42.Bf3 Qg3 43.Rb6?? Rf3 44.Re6 Bf4 45.Qg1 Rd3 46.Rf1 Re3 47.Re3 de3 48.Rf3 Qh4 49.g4 e2 (50.g5 e1Q 51.gh6 Qg1 52.Kg1 Be3 53.Kg2 Qg5 54.Kf1 Rf3 55.Ke2 Rf2 56.Kd3 Qc5 57.h7 Kh7 58.Ke4 Qd4#) 0–1. kostovist – chessotka (1635), internet, 2006.

5.c4 Bd6 6.cd5 ed5 7.Nf3 0–0 8.Ne5 Qe7 9.f4 Ne4 10.Bd3 f6 11.Be4 Be4 12.Nf3 Bf3 13.Qf3 d4 14.0–0 de3 15.de3 Nc6 16.Nd2 Rad8 17.Ne4 Rfe8 18.Qg4 Qe4 19.Bf6 Qg6 20.Qg6 hg6 21.Bd8 Rd8 22.f5 gf5 23.Rf5 Re8 24.Raf1 Re3 25.b5 Nd4 26.Rf7 Ra3 27.Rd7 Ne2 28.Kh1 Rb3 29.g3 Rb5 30.Rff7 Rg5 31.Rf2 Nd4 32.Rd2 Nc6 33.Kg2 a5 34.h4 Rg3 35.Kf2 a4 36.Rc2 a3 37.Rd6 cd6 38.Kg3 b5 39.Ra2 b4 40.Kf4 Nd4 41.Ke4 Nb5 42.Kd5 b3 43.Ra1 b2 44.Rb1 a2 45.Rb2 a1Q 46.Rb5 Qd1 47.Ke6 d5 48.Kf5 Qe2 49.Rb7 Qf2 50.Kg6 d4 51.Rb8 Qf8 52.Rf8 Kf8 53.Kf5 d3 54.Ke4 d2 55.Kd3 d1Q 56.Ke3 0–1. Nautiluschess – MasterB, ICS blitz, 2001.

5.d4 a6 6.Bd3 Bd3 7.Qd3 Nbd7 8.Nf3 Bd6 9.Nbd2 Nb6 10.0–0 Na4 11.Bc1 0–0 12.c4 dc4 13.Nc4 Be7 14.Nce5 c6 15.Qb3 (15.e4 a5+=) 15...Nb6= 16.Bb2 Qc7 17.Rac1 Nbd7 18.a4 Ne5 19.Ne5 Nd7 20.f4 Ne5 21.de5 Qb6 22.Ba3 Rfd8 23.a5 Qb5 24.Rfd1 Rd1 25.Rd1 Rd8 26.Rd8 Bd8 27.Qd1 Qd5 (27...Be7 28.Qd4–/+) 28.Qd5= ed5 29.Bb2 Kf8 30.Bd4 Be7 31.Bc5 Bc5 32.bc5 Ke7 33.Kf2 f6 34.ef6+= Kf6 35.Ke2 g5 36.g3 h6 37.Kd3 Kf5 38.h3 g4? 39.h4 h5? 40.Kd4 Kf6 41.Kc3 Kf5 42.Kd4 Kf6 43.Kc3 Ke6 44.Kd4 Kf5?? 45.Kd3 Ke6 46.Kd4 Kf5 47.Kd3 Ke6= 48.Kd4 ½–½. Fournier,Frederic (1825) – shoku (1920), Active, 2008.

5.Ne2 a5 6.ba5 Ra5 7.Ng3 Bg6 8.c4 (8.h4 h5=) 8...Bd6 9.Qb3 b6 10.d4 (10.cd5 ed5 11.Bd3 Nbd7=+) 10...h5 (10...0–0 11.Be2=+) 11.f3 (11.Nc3 h4 12.Nge2 dc4 13.Qc4 c6=+) 11...h4 12.Ne2 dc4 (12...Nbd7 13.Nd2=+) 13.Qc4 Nd5 14.e4 (14.Qb3 c6 15.Nc1 Qg5=+) 14...Ne3 15.Qc3 Nf1 16.Kf1 e5 (16...h3 17.g3=+) 17.Nd2= ed4 18.Qd4 f6 (18...h3 19.g4 f6 20.Nc4=) 19.Nc4 Nc6 20.Nd6 (20.Qd3 Rc5=) 20...Qd6 (20...cd6 21.Qc4 Ne7 22.Nf4=) 21.Qd6 cd6 22.Nf4 Bf7 23.Ke2 Kd7 24.Rac1 Ne5 25.Rc2 Rc8 26.Rc8= Kc8 27.Rd1 Nc4 28.Bc1 Kd7 29.Rd3 Rb5 30.Nd5 Rb1 31.Rc3 b5 32.Nb4= Be6 33.g4 Na5 34.Rc2 Nb3 35.Bb2 ½–½. Binder,Klaus – Kuhne,Detlev, DESC, 2001.

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.Nf3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.c4 dc4

6.Qa4 c6 7.Bc4 –+.

6.Bc4 Be7 7.Ne2 0–0 8.Ng3 Bg6 9.Nc3 c6 10.h4 h6 11.Nce2 Ne4 (11...b5!? 12.Bb3 Bd6+=) 12.h5= Bh7 13.Bd3?? (better is 13.Ne4 Be4 14.d3=) 13...Qd3–+ 14.Ne4 Qe4 15.Nc3 (15.Ng3 Qc4 16.e4–+) 15...Qg2 16.Rf1 Bd3 17.Ne2 Bh4 18.Qb3 Be2 (18...Rd8!? 19.Bd4 Qe4 20.Qc3–+) 19.Ke2 Qg4 20.Ke1 Qh5 21.Rg1 e5 22.Rc1 (22.Rh1 Qg4–+) 22...Bf6 (22...Rd8 23.Qd1 Qf5 24.Rg2–+) 23.Rc4 Kh8 24.Rcg4 Nd7 25.Qc4 Nb6 26.Qe4 g5 27.Be5 Be5 28.Qe5 f6 29.Qe4 Qe8 30.Qf5 Kg7 31.Rh1 Qg6 32.Qf3 Rad8 33.Re4 Nd5 34.Qg2 Rfe8 35.Reh4 gh4 36.Qg6 Kg6 37.Rh4 Kg5 38.Rh2 h5 39.Kf1 h4 40.f4 Kh5 41.Kf2 f5 42.Rg2 Rg8 43.Rg8 Rg8 44.Kf3 Nf6 45.d3 h3 46.e4 h2 47.ef5 h1Q 48.Ke3 Re8 49.Kd4 Qd5 50.Kc3 Re3 51.Kc2 Qd3 0–1. cetst11 (1660) – mr5reasons1 (1635), gameknot.com, 2012. (=1.e3 d5 2.a3 Nf6 3.b4 Bf5 4.Bb2 e6)

5.c4 c5

6.Qa4 Qd7 7.Qd7 Nbd7 8.bc5 Bc5 9.cd5 ed5 10.Bb5 0–0 11.Nc3 d4 12.Na4 de3 13.de3 Be7 14.Ne2 a6 15.Bd7 Nd7 16.Nac3 (16.Nd4 Bg6=) 16...Nb6 (16...Ne5 17.Nd4 Bg6 18.Nd5 Nd3 19.Ke2=+) 17.0–0 (17.e4!? Nc4 18.Nd5=) 17...Nc4–/+ 18.Bc1 Rfd8 19.Nd4 (19.e4 Be6–/+) 19...Bg6 20.a4 Bf6 21.Nce2 Bd3 22.Re1 Be2 23.Re2 Bd4 24.ed4 Rd4 25.Be3 (25.Bb2 Rdd8–/+) 25...Rd3 26.Rae1 h5 27.Rc1 Ne3 28.Re3–/+ Re3 29.fe3 b5 30.ab5 ab5 31.Kf2 Rb8 32.Ke2 b4 33.Rb1 g6 34.Kd3 Kg7 35.Rb3 Kf6 36.Kc4 Ke5–+ 37.Rd3 b3! 38.Rb3 Rb3 0–1. thedesertfox (1905) – sirjohn (2000), net–chess.com, 2004.

6.cd5 ed5 7.bc5 Bc5 8.Qf3 Be4 9.Bf6 gf6 (worse is 9...Qf6 10.Qf6 gf6 11.Nc3+/–) 10.Qe2 Nc6 11.Nc3 Bg6 (11...a6 12.Nh3=) 12.d4 (12.Qb5 Qd6 13.Qb7 Rb8+/–) 12...Bb6 (12...Qa5 13.Qb2 Bd6 14.Nge2+=) 13.Qd2 (13.Qb5 Ba5 14.Rc1 Qd7+=) 13...0–0 (13...Rc8 14.Bb5+=) 14.Bb5 Na5 15.Qa2 Attacks the isolani on d5 15...Rc8 16.Nge2 (16.Rc1 a6 17.Be2 Nc4+=) 16...a6 17.Ba4 Rc4 18.h4 Bc7 19.h5 Be4 20.Ne4 (20.f3 Bd3 21.Bc2 Be2 22.Ne2 Re8+=) 20...de4= 21.Bc2 f5 (21...Re8 22.Qb1 Qd5 23.Qb2=) 22.g3 (22.g4!? fg4 23.Be4+=) 22...Qd7= 23.h6 (23.Rc1 b5+=) 23...Qc6 24.Bd1 Rd8 25.Qb2 Rd5 26.a4 (better is 26.Nf4 Rb5 27.Qa2=) 26...Rd6?? (26...Bd6 27.Nf4 Bb4 28.Kf1=) 27.Nf4?? (27.d5 Rh6 28.dc6 Rh1 29.Ng1 Rg1 30.Ke2 Rc6 31.Qd4–+) 27...Rh6+= 28.Rh6 Qh6 29.Nh5 Bd8 (29...Bd6 30.Rc1 Rc1 31.Qc1+=) 30.Be2= Rc7 31.Rb1 Nc4 32.Qb3 Nd6 33.Kf1 (33.Qd5 Be7+=) 33...Qe6 (33...Rc6 34.Qd5–/+) 34.Qb2 Ne8 (34...Rc8 35.Nf4 Qd7 36.Qb3+=) 35.Kg2 Qd7 36.Bd1 (36.a5 Nd6+=) 36...Ng7 (36...Nd6 37.Bb3+=) 37.Nf4 Ne6 (37...Bg5 38.Nh3 Be7 39.Nf4+=) 38.Ne6= Qe6 39.Bb3 Qc6 40.a5 h5 (40...Qd6 41.Qe2+=) 41.d5 (41.Qa2!?=) 41...Qd6+= 42.Ba4 h4 (42...Qd5?? 43.Rd1 Qd1 44.Bd1+–) 43.Qb6 Qe5 (43...Qd5 44.Rd1 Qd1 45.Bd1+–) 44.Qb2 Rc3 (44...Qb2!? 45.Rb2 hg3 46.Kg3 Rc4=) 45.Qb7= Bc7 ½–½. Cirulis,Ilmars (2015) – Ropokis,Dimitrios (1920), FICGS, 2016.

5.c4 Be7

6.Nc3 0–0 7.Nf3 Nbd7 8.c5 c6 9.Be2 h6 (9...e5 10.–0=) 10.Na4 (10.Nd4 Bg6=) 10...Qc7 11.Rc1 (11.Nh4 Bh7=) 11...e5 12.d3 (12.0–0 b5 13.cb6 ab6=) 12...b5+= 13.Nc3 a5 14.0–0 Bg6 (14...Ra7 15.Nb5 cb5 16.c6+=) 15.Nb5 (15.Ra1 Rfe8=) 15...cb5+= 16.c6 Nb8 (16...Nb6 17.Be5 Qc8 18.Bd4=) 17.Be5= Qb6 18.Bd4 Qa6 19.Ne5 (19.Bf6 Bf6 20.c7 Nd7-/+) 19...ab4 20.ab4 Qc8 21.Ng6 fg6 22.e4 Na6 (worse is 22...Nc6 23.Bf6 Rf6 24.ed5+/-) 23.Bf3 (23.e5 Ne8-/+) 23...Nb4 (23...de4 24.de4 Qc7 25.e5+=) 24.c7 (24.Qb3!? Kh7 25.ed5+=) 24...Ra3-/+ 25.Bb2 (25.Be2 Nd7-/+ (25...de4?! 26.de4 Na2 27.Rc2=)) 25...Ra7 (better is 25...Rd3!? 26.Qe2 Bd6–+) 26.Be5 Qd7 27.Re1 Rc8 28.Qb3 Kh8 29.h3 (29.Rb1 Nc6 30.Bf6 gf6 31.Qd5 Rcc7 (31...Rac7?! 32.Qd7 Rd7 33.Bg4+=; 31...Qc7?! 32.Rec1-/+) 32.Qb5 Rab7–+) 29...de4 30.de4 Nd3 (30...Rac7?! 31.Bc7 Rc7 32.e5 Rc1 33.Rc1+=; 30...Rcc7?! 31.Bc7 Rc7 32.e5+=) 31.Rcd1 Ne5 (31...Ra3!? 32.Qb1 Qe6 33.Bf6 Rb3=) 32.Rd7-/+ Nfd7 0–1. Cirulis,Ilmars (1890) – DiAlfonso,Darren (2100), FICGS, 2015.

6.cd5 ed5 7.Nf3 0–0 =.

6.Nf3 0–0 7.Qb3 (7.Bf6 Bf6 (< 7...gf6 8.cd5 Qd5 9.Nc3=) 8.d4 dc4 9.Bc4 a5=) 7...a5 (7...dc4 8.Bc4 a5 9.d3=+) 8.b5 (8.ba5 dc4 9.Qb7 Be4=) 8...Nbd7 9.d4 (9.cd5 Nc5 10.Qc3 Na4–/+) 9...a4–/+ 10.Qd1 c5 (10...Nb6 11.c5 Nc4 12.Bc4 dc4 13.Nc3=+) 11.Nbd2 (11.bc6 bc6 12.Nc3 Qa5=+) 11...Qa5 (11...Bd6 12.Rc1=+) 12.Ne5 (12.cd5 Nd5 13.Bc4 N7b6 14.Bd5 Nd5 15.dc5 Qb5=+) 12...Ne5–/+ 13.de5 Ne4 14.f3 (14.cd5 ed5 15.Be2–+) 14...Bh4 (14...Nc3!? 15.Qc1 d4–/+) 15.g3=+ Ng3 (15...Nd2!? 16.Qd2 Bd8=+) 16.hg3= Bg3 17.Ke2 Rfd8 (17...dc4 18.Nc4 Qb5 19.Qc1=) 18.Qc1 (18.Rg1 dc4 19.Rg3 Bd3 20.Ke1 Bf1=) 18...d4 (18...dc4 19.e4 Bf4 20.Bc3 Qb5 21.ef5 Rd2 22.Bd2 c3 23.Kf2 cd2 24.Bb5 dc1Q 25.Rac1 Bc1 26.Rc1+/–) 19.e4=+ Bg6 20.Kd3 (20.Kd1 Qb6=) 20...Be5 (20...Qb6 21.Qc2=+) 21.Bh3 Rd6 22.Nf1 Rb6 23.Rb1 Re8 24.Qe1 Rb5 25.Qa5?? Ra5–/+ 26.Bc1 Rb8 27.Bd2 Ra6 28.f4 Bc7 29.Ng3 f6 30.f5 Be8 31.e5? Be5 32.Ne4 Rc6 33.fe6=+ Bg6 34.Rhf1 b5 35.Bg2? Re6 36.Rb5 Rb5 37.cb5–/+ Bc7 38.Re1 Bb6 39.Kc4 Bf7–+ 40.Kd3 c4! 41.Kc2 c3 42.Nc3 dc3 43.Re6 Be6 44.Kc3 Kf7 45.Be4 h5 46.Kb4 Bb3 0–1. Remizov,Juri (2150) – Monin,Nikolay (2390), St Petersburg op, 1994.

6.h3 0–0 7.cd5 (7.Nf3 a5 8.b5 Nbd7=+) 7...Nd5 (7...ed5 8.Nf3=+) 8.Nc3 (8.Qf3 Bg6=+) 8...Nc3 (8...a5 9.b5=+) 9.Bc3 (9.dc3 c5=+) 9...Nd7 (9...a5 10.ba5 Nc6 11.a6 ba6 12.Qa4=) 10.Nf3 (10.Qf3 c6=+) 10...h6 (10...Rc8 11.d4=) 11.d4 (11.Be2 Bd6=) 11...Nf6 12.Bd3 Qd5 13.0–0 Ne4 (13...Rfd8 14.Bf5 Qf5 15.Rc1=) 14.Bb2 Nf6 15.Bf5 (15.Rc1 Bd3 16.Qd3 c6=) 15...Qf5 16.Qc1 (16.Qb1 Qd5=) 16...Bd6 17.Nh4 (17.Ne5 Rfd8=) 17...Qd3 (17...Qe4 18.Nf3=+) 18.Nf3 (18.Qb1 Qb3=) 18...Ne4 (18...a5 19.Ne5 Qb3 20.ba5 Ra5 21.Rb1=) 19.Qd1 (19.Ne5 Qb3=) 19...Qd1 20.Rfd1 a5 21.ba5 Ra5 22.Nd2 (22.Ne5 b5=) 22…Nd2=+ (23.Rd2 Rfa8=). thedesertfox (1920) – redrook (2565), net–chess.com, 2005.

5.d4 Be7

6.c4 c6 7.Ne2 Nbd7 8.Ng3 Bg6 9.c5 Qc7 10.Bd3 e5 (10...Bd3!? 11.Qd3 h5=+) 11.de5 Ne5 12.Bg6 hg6 13.Nd2?? (13.Ra2 b6=+) 13...Neg4?? (13...Nd3 14.Kf1 Nb2 15.Qc2–+) 14.h3? (14.Ndf1 b6=+) 14...Ne5?? (14...Ne3 15.fe3 Qg3 16.Kf1–+) 15.Rc1?? (15.Be5 Qe5 16.Ne2 b6=) 15...g5 (better is 15...Nd3 16.Kf1 Nb2–+) 16.Qb3 g4 17.h4 Ne4 (better is 17...g6=+) 18.Nde4+/– de4 19.Ne4 Rh4?? (better is 19...0–0–0 20.Bd4 Kb8+=) 20.Rh4+– Bh4 21.Rd1 (better is 21.Nd6 Kf8 22.Be5 Kg8+–) 21...g3?? (better is 21...Kf8+/–) 22.Nd6 (22.Be5!? gf2 23.Kf1 Qe7+–) 22...Kf8 23.f4 (better is 23.Be5 gf2 24.Kf1+–) 23...Ng6? (23...Ng4 24.Kd2 Nf2 25.Kc1 Nd1 26.Qd1+=) 24.e4 (24.f5 Nh8+–) 24...Rd8? (24...Nf4 25.Be5 Nh5 26.Kd2+/–) 25.e5 (better is 25.f5!? Nh8 26.Kd2+–) 25...Nf4 26.Qf3 g5 27.Qe4 (better is 27.Kd2+=) 27...Qe7?? (better is 27...Kg8=) 28.Qh7+– Ng6 29.Qh6 Kg8 30.Kd2?? (30.e6 Qe6 31.Kd2 Ne5 32.Qe6 Nf3 33.gf3 fe6+–) 30...Ne5?? (30...Qe6 31.Kc2+=) 31.Re1 (31.Kc2 Qe6 32.Qe6 fe6 33.Be5 Rd7+–) 31...f6?? (31...Rd6 32.cd6 Qd6 33.Qd6 Nc4 34.Kd3 Nd6+/–) 32.Be5+– fe5 33.Qg6 (33.Rf1 g4 34.Rf5+–) 33...Qg7+= 34.Qe6 Kh7 35.Re5 g4?? (35...Rf8 36.Kd3+=) 36.Qf5 (36.Rh5 Qh6 37.Qh6 Kg8 38.Qh8) 36...Qg6+/– 37.Re7?? (better is 37.Qg6 Kg6 38.Re6 Kh5 39.Ke3 Bg5 40.Kd3+=) 37...Kg8 (better is 37...Be7 38.Qg6 Kg6–+) 38.Qg6 (38...Kf8 39.Rf7) 1–0. slavisa11 – KKTtoWMD, Live Game Caissa's Web, 2004.

6.Nf3 0–0 7.Nh4 Be4 8.f3 Bg6 9.Ng6 fg6 10.Bd3 Bd6 11.h4 Qe7 12.g4 e5 13.g5 Nh5 0–1. tromar (1945) – NN, GameColony.com, 2002.

4.b5 Nbd7

5.a4 e5 6.f3 (6.Nf3 Bd6=+) 6...h6 (better is 6...Bd6–/+) 7.g4? (7.Ne2 Bc5=+) 7...Bh7 (better is 7...Ng4 8.Ke2 Qg5–+) 8.Ne2 Bd6 (8...Qe7 9.Bg2–/+) 9.d3 (9.h4 Bg6–/+) 9...Qe7 10.Nd2 (10.Bg2 Bc5 11.Qd2 e4 12.fe4 Ng4–/+) 10...Bb4 (10...e4 11.Nc3–/+) 11.c3 Ba5 12.Qb3?? b6 13.Bg2? Rc8 14.e4 d4 15.0–0 dc3 16.Bc3 Bc3 17.Nc3 0–0 18.Nd5 Nd5 19.Qd5 Nc5 20.Ra3?? Rfd8 21.Qc4 Rd4 22.Qc3 Rd3 23.Qc5?? Qc5 24.Kh1 Qa3 25.Nc4 Qa4 26.Ne5 Rd2 27.Nc6 Qa2 28.Rg1 a5 29.Ne7 Kf8 30.Nc8 a4 31.f4 Be4! 32.Na7 Bg2 33.Rg2 Qd5 (34.Nc6 Qg2#) 0–1. MasterofDisaster – agapito, Live Game Caissa's Web, 2005.

5.c4 e5 6.cd5 Nd5 7.Nf3 Bg4 (7...Nb4 8.d3 e4 9.de4 Be4 10.Nd4–/+) 8.Be2 (8.h3 Bh5=) 8...Bd6 (8...e4!? 9.Nd4 Be2 10.Qe2 Nc5+=) 9.0–0 0–0 10.Nc3 N7f6 (better is 10...Nc3!? 11.Bc3 Qe7=) 11.Nd5+/– Nd5 12.Ne5 Be2 13.Qe2 Qf6 (13...Qe8 14.f4+/–) 14.Nc4 Qh6 15.Nd6 Qd6 16.a4 Rad8? (better is 16...Rfe8+/–) 17.Ba3+– c5 (17...Nb4 18.Qg4 c5 19.bc6+–) 18.bc6! Nb4 (18...bc6 19.Bd6 Combination; 18...Qc6 19.Bf8 Pinning (19.Bf8 Deflection)) 19.Qc4 (better is 19.c7 Rc8 20.Qb5 Qc7 21.Bb4 Rfd8+–) 19...a5 20.cb7 Qd2 (20...Rd7 21.Qb5 Rb8+–) 21.Bb4 ab4 22.Rfb1 Qc3 23.Qb4 (better is 23.Qc3 bc3 24.Ra2+–) 23...Qb4?? (better is 23...Rd1 24.Rd1 Qb4+–) 24.Rb4 Rb8 25.a5 f6 26.a6 1–0. Campe,Ulrich (1635) – Dombrowski,Jan, Berlin Hellersdorf op, 2010.

5.d4 e6 6.Nf3 Bd6 7.Be2 0–0 8.0–0 Ne4 9.c4 c6 10.a4 Qf6 11.c5 Bc5 12.Nbd2 Bd6 13.Ne4 de4 14.Ne5 Ne5 15.de5 Be5 16.Be5 Qe5 17.bc6 bc6 18.Qd7 Qd5 19.Qe7 Rfe8 20.Qb4 Rab8 21.Qc3 e5 22.Rfd1 Qe6 23.Qc5 Qe7 24.Qc6 Rec8 25.Qd6 Qd6 26.Rd6 Rc2 27.Rad1 f6 28.Bb5 Rbc8 29.h3 Rc1 30.Rd8 Rd8 31.Rc1 Rc8 32.Rd1 Kf8 33.Kf1 Ke7 34.Ke1 Be6 35.Rd2 Rc1 36.Rd1 Rd1 37.Kd1 Kd6 38.Kd2 Kc5 39.Kc3 f5 40.h4 h6 41.g3 g5 42.hg5 hg5 43.Be8 f4 44.Bb5 Bd5 45.Be2 a5 46.Bd1 Kd6 47.Bg4 Ke7 48.Bd1 Ke6 49.g4 Kd6 50.Bb3 Bc6 51.Kc4 Bd7 52.Bc2 Bg4 53.Be4 fe3 54.fe3 Bd7 55.Bc2 g4 56.Kd3 g3 57.Ke2 Bg4 58.Kf1 Bf3 59.Bf5 Kc5 60.Bd7 Bc6 61.Bc6 Kc6 62.Kg2 Kc5 63.Kg3 Kb4 64.Kf3 Ka4 65.Ke4 Kb4 66.Ke5 a4 67.Kf5 a3 68.e4 a2 69.e5 a1Q 70.e6 Qh8 71.Kg6 Qf8 0–1. Litvinov,V – Petrik,F, Kyiv, 2000.

5.f4 e6 6.Nf3 Bd6 7.Be2 0–0 8.0–0 c5 9.d3 Qc7 10.Nbd2? (better is 10.Nh4=) 10...Ng4–+ 11.Nh4? (better is 11.e4 Ne3 12.Qe1 Nf1 13.Qf1–+) 11...Ne3 12.Qe1 (12.Qb1 Bf4 13.Nf5 Bh2 (< 13...ef5 14.Rf3–+; < 13...Nf5 14.Nf3–+) 14.Kh1 Nf5 (< 14...ef5 15.Rf3–+) 15.Rf5 ef5–+) 12...Bf4 13.Rf4 Qf4 14.g3 (14.Nb3 e5 15.g3 Qh6–+) 14...Qd6 (better is 14...Qb4!? 15.Nf5 ef5 16.Nb3 Qb5 17.d4–+) 15.Qf2 d4 16.Nc4 Nc4 17.dc4 (17.Nf5 ef5 18.dc4–+) 17...Bc2 18.Bc1 (18.Qg2 Ne5–+) 18...Rae8 (better is 18...d3 19.Be3 de2 20.Qe2–+) 19.Bf1 f5 (better is 19...Be4–+) 20.Qc2 Nf6 21.Bf4 Qd7 (21...e5!? 22.Nf5 Qd7 23.Bg5–+) 22.Nf3–/+ Ng4 23.Ne5 Ne5 24.Be5 g5 (24...Rd8 25.Bg2–/+) 25.Bd3 Qf7 (25...Rd8 26.Qd2 Qe7 27.Re1=+) 26.Rf1 (26.Bd6!? e5 27.Bf8 Rf8 28.Rf1+=) 26...Rd8=+ 27.Qd2 h6 28.h4 Qh5 29.hg5 hg5 30.Rf2 Qg4?? (better is 30...Rd7 31.g4 Qg4 (31...fg4?? 32.Rh2 Qh2 33.Qh2+–) 32.Rg2 Qh4=) 31.Be2+– Qe4 (31...Qg3 32.Bg3 f4+–) 32.Qg5 Kf7 (32...Kh7 33.Qg7) 33.Bh5 1–0. Otte,Marco – van der Harst,Albert, Wag.Intcomp, 1997.

5.a4 e6

6.h3 h6 7.Nf3 Bb4 A) 8.Be2 Bd6 (8...0–0 9.0–0 Bd6 10.Nd4 Bg6 11.f4=; 8...Qe7 9.a5 e5 10.0–0 a6 11.ba6=; 8...Rc8 9.0–0 0–0 10.a5 c5 11.a6=) 9.0–0 e5 10.a5 a6 11.d4=; B) 8.Nc3 e5 (8...0–0 9.a5 e5 10.a6 Rb8 11.ab7=; 8...Ba5 9.Be2 e5 10.0–0 0–0 11.Na2+=; 8...Rb8 9.a5 0–0 10.a6 c5 11.Be2=) 9.Be2 0–0 10.0–0 a6 11.ba6+=; C) 8.a5 c5 (8...Nb8 9.Nd4 Be4 10.Nc3 c5 11.bc6=; 8...Be4 9.a6 ba6 10.Ra6 Bd6 11.Nc3=; 8...a6 9.ba6 ba6 10.Nd4 c5 11.Nf5=) 9.bc6 bc6 10.Nd4 Qc7 11.Nf5=.

6.h3 h6 7.Nf3 Bc5 A) 8.a5 a6 9.ba6 ba6 10.Be2 0–0 11.Nc3=; B) 8.Be2 0–0 (8...Qe7 9.0–0 0–0–0 10.a5 Kb8 11.Nc3=; 8...a6 9.ba6 ba6 10.Nc3 0–0 11.Rb1=; 8...Bd6 9.0–0 0–0 10.Nd4 Bg6 11.f4=) 9.0–0 a6 10.ba6 ba6 11.Nc3=; C) 8.Nc3 a6 (8...0–0 9.Be2 Bd6 10.a5 e5 11.0–0=; 8...Rb8 9.Be2 0–0 10.0–0 Re8 11.a5=; 8...Bb4 9.a5 e5 10.a6 b6 11.g4=) 9.ba6 ba6 10.Be2 0–0 11.Rb1=.

6.h3 h6 7.Nf3 Bd6 8.d4 (8.a5 a6 (8...Nc5 9.a6 ba6 10.Nd4 0–0 11.Nf5=; 8...0–0 9.Nd4 Bg6 10.a6 Qc8 11.ab7=; 8...e5 9.a6 Rb8 10.ab7 Rb7 11.d4=) 9.Nd4 Bg6 10.ba6 ba6 11.Nc6+=; 8.Be2 Qe7 (8...0–0 9.0–0 e5 10.Ba3 Qe7 11.Bd6=; 8...Nc5 9.0–0 0–0 10.Nc3 a6 11.Nd4=; 8...e5 9.0–0 Qe7 10.a5 a6 11.d4+=) 9.a5 e5 10.d4 e4 11.Nfd2+=) 8...0–0 (8...Qe7 9.c4 Bb1 10.Qb1 Bb4 11.Kd1=; 8...c6 9.c4 0–0 10.c5 Bc7 11.Nc3=; 8...c5 9.Bd3 Bd3 10.cd3 0–0 11.dc5+=) 9.Bd3 (9.Ba3 Ba3 10.Ra3 Rc8 11.Bd3+=) 9...Bd3 10.cd3 (10.Qd3 c5 11.bc6+=) 10...a6 11.Nc3 c6 12.0–0 c5 13.Qd2 cd4 14.Nd4 Nc5 15.Ba3 Rc8 16.ba6 ba6 17.Rfb1 Re8 18.Rb2 Qd7 The isolani on a4 becomes a target 19.Rab1 e5 20.Nf3 e4 21.Bc5 Bc5 22.Nd4 Bd4 23.ed4 ed3 24.Qd3 Qc6 25.Rc1 Qc4 26.Qd1 Qc6 27.Qd3 Qd6 28.Rbc2 Rb8 29.Ne2 a5 30.Rc7 Rb2 31.Rc8 Qe6 32.Re8 Qe8 33.Nf4 Rb4 34.Rc5 Exerts pressure on the isolated pawn 34...Ra4 (34...Qa4? 35.Nd5 Ne8 36.Nb4 Qb4 37.Qe4+–) 35.Qf5 Increasing the pressure on the isolated pawn on d5 35...Nd7 (35...Rd4? 36.Rc8 Qc8 37.Qc8 Kh7 38.Qc7+–) 36.Rd5 Nf6 37.Re5 Qd7 38.Ra5 Qf5 (38...Qd4?? 39.Qc8 Kh7 40.Qc2 Qe4 41.Qa4 Qe1 42.Kh2 Qf2 43.Ra7+–) 39.Rf5 Rd4 40.f3 ½–½. marekt (1995) – fixxxer (2135), gameknot.com, 2014.

6.h3 h6 7.Nf3 Nc5 A) 8.Be2 Bd6 (8...a6 9.0–0 ab5 10.ab5 Ra1 11.Ba1=; 8...Be7 9.0–0 0–0 10.Nc3 a6 11.d3=; 8...Qe7 9.0–0 0–0–0 10.a5 Be4 11.Ne5+/–) 9.0–0 0–0 10.Nc3 a6 11.ba6=; B) 8.Nc3 Bd6 (8...Be7 9.Be2 Qd6 10.0–0 0–0 11.d4=; 8...Nce4 9.a5 Nc3 10.Bc3 Ne4 11.Bd4=; 8...Qe7 9.a5 e5 10.d4 Nce4 11.Ne4+=) 9.Be2 Qe7 10.a5 0–0 11.0–0=; C) 8.a5 a6 (8...Bd6 9.a6 ba6 10.Nd4 0–0 11.Nf5=; 8...Be7 9.a6 ba6 10.Nd4 0–0 11.Nf5=) 9.Nd4 Bg6 10.ba6 ba6 11.Be2=.

5.Nf3 h6

6.c4 e6 7.d3 dc4 8.dc4 Bb4 9.Bc3 Bc3 10.Nc3 0–0 11.Be2 Qe7 12.0–0 Nc5 13.Nd4 Bh7 14.Na4 Nfe4 15.Nc5 Nc5 16.Qc1 e5 17.Nb3 Nd3 18.Bd3 Bd3 19.Rd1 Rfd8 20.Qc3 e4 21.a4 a6 22.h3 ab5 23.ab5 Qe6 24.Ra8 Ra8 25.Rc1 Ra3 26.Qb4 Ra2 27.Nd4 Qf6 28.Qe1 c6 29.bc6 bc6 30.c5 g6 31.Ra1 Rb2 32.Ra8 Kg7 33.Ra1 Bc4 34.Rc1 Bd3 35.f3 ef3 36.Nf3 Be4 37.Nd2 Bd5 38.e4 Qd4 39.Kh1 Qd2 40.Qd2 Rd2 41.ed5 Rd5 42.Kg1 Kf6 43.Kf2 Re5 44.Kf3 Ke6 45.g4 Kd5 46.Kf4 g5 47.Kf3 f5 48.Rd1 Kc5 49.Rd8 fg4 50.hg4 Re6 51.Rb8 Kc4 52.Rb6 Kd5 53.Rb8 c5 54.Rd8 Kc4 55.Rc8 Rd6 56.Ke3 Kb4 57.Rb8 Kc3 58.Rc8 Re6 59.Kf2 c4 60.Rc7 Kb3 61.Rb7 Kc2 62.Rb8 c3 63.Rb7 Kc1 64.Rd7 c2 65.Rb7 Re4 66.Kf3 Rf4 67.Kg3 Rd4 68.Rf7 Rd3 69.Kg2 Kd2 70.Rf2 Kc3 71.Rf6 c1Q 72.Rc6 Kd2 0–1. Bittner – Czeschka, 1985.

6.d4 e6 7.Bd3 Bd3 8.cd3 Bd6 9.Qb3 c5 10.Nc3 0–0 11.a4 a6 12.0–0 Qe7 13.Ne2 Rfe8 14.Ne5 Rec8 15.f4 ab5 16.ab5 Ra1 17.Ra1 Be5 18.de5 Ng4 19.g3 Ne3 20.Ra7 Qd8 21.Ra2 d4 22.Bc1 Nd5 23.Bd2 Ra8 24.Ra8 Qa8 25.f5? Ne5 26.fe6 fe6 27.Nf4 Nf3 (28.Kf2 Nd2–+) 0–1. Andersson,Lars H – Hind,Alan, corr 3GMM½–05, 1998.

4.c4 dc4

5.Bc4 Nbd7

6.b5 e6 7.Nf3 Be7 (7...Nb6 8.Be2=+) 8.Nc3 (8.0–0 Nb6 9.d3 Nc4 10.dc4 Bd3–/+) 8...0–0 (8...Nb6 9.Be2=+) 9.0–0 Rc8 10.Be2 h6 (10...c6 11.Nd4=) 11.h3 (11.Nd4 Bg6=) 11...c6 12.a4 (12.Nd4 Bg6=) 12...b6 (12...Ne4 13.Nd4=) 13.bc6 (13.Nd4 Ne5+=) 13...Rc6= 14.Nd4 Rc5 15.Ba3 (15.Nf5 Rf5 16.Rc1 Rc5=) 15...Rc8 (15...Ra5 16.Nc6 (16.Nf5?! Rf5 17.d4 Ba3 18.Ra3 Qe7=) 16...Ba3 17.Nd8+– (17.Ra3?! Qc7 18.Na5 ba5+–)) 16.Nf5 ef5 (The passed pawn on d2 quickly leads to threats) 17.Bb2 Nc5 18.d4 Nce4 19.Nb5 (19.Rc1 Re8=) 19...Qd7 (19...a6 20.Na3 Ra8 21.Rc1=) 20.Qd3 Nd5 21.Rfc1 Bh4 22.g3 Be7 23.Bf3 Nb4 24.Qe2 Rfe8 25.Nc3 (25.Rc8 Rc8 26.Na3 Nd5=) 25...Bd6 (25...a6 26.a5 b5 27.Ne4 fe4 28.Be4 Qh3 29.Qf3+=) 26.Ne4 (26.a5!?+=) 26...Rc1 27.Rc1 fe4 28.Bg4 f5 (28...Qa4 29.Ra1 Na2 30.Bf5=) 29.Qc4 Kh8 30.Be2 ½–½. Gross,Wilhelm – Merten,Rainer, xxiv/03, 1992.

6.d4 Nb6 7.Be2 +=.

6.d4 e6 7.a3 a5 (7...Bd6 8.Nf3=+) 8.b5 Bd6 (8...Nb6 9.Bd3=+) 9.Nf3= 0–0 (9...Nb6 10.Bd3=) 10.Nbd2 (10.0–0 Nd5=) 10...h6 (10...a4 11.0–0=) 11.0–0= Qe7 12.Re1 Ne4 (12...Nb6 13.Bf1 Ne4 14.Ne4 Be4 15.Nd2+=) 13.Ne4 Be4 14.Nd2 Bg6 (14...Nb6 15.Be2 Bg6 16.Bf3=) 15.e4 Qd8 16.g3 (16.d5 e5+=) 16...Nb6 (16...a4 17.Rc1=) 17.Bf1 (17.Bd3 Qd7=) 17...Re8 (17...a4 18.Rc1=) 18.Bg2 e5 19.d5 (19.f4 ed4 20.e5 Bc5+=) 19...Qd7 20.Qe2 (20.Rb1 Rad8=) 20...Na4=+ 21.Nf1 c6 22.dc6 bc6 23.bc6 Qc6 24.Rac1 Qb7 25.Rb1 Qe7 26.Ba1 Rec8 27.Rb3 Nc5 28.Rb5=+ a4 29.Nd2 Qd7 30.Reb1 Rab8 31.Rb8 Rb8 32.Rb8 Bb8 ½–½. Gross,Wilhelm – Merten,Rainer, xxiv/15, 1993.

6.Qf3 Be4 7.Qg3 Nb6 =+.

6.d4 e5

7.Qb3= Qe7 8.a3 ed4 9.Bd4 c5 (9...Nb6 10.Bb6 ab6 11.Nf3=) 10.Bc3 (10.bc5 Rc8 11.Qb7 Rb8=) 10...Bg6 (10...a6 11.b5=+) 11.b5 (11.Nd2 a6=) 11...Ne4 (11...Ne5 12.Nf3 Nf3 13.gf3=) 12.Nf3 Nb6 13.Nbd2 Nc4 14.Nc4 f6 (14...Rd8 15.0–0=) 15.b6 (15.0–0 Bf7 16.Rac1 Qe6=) 15...Qe6 (15...Nc3 16.Qc3 ab6 17.Qb2=) 16.Qb5 (16.Ba5 Be7=) 16...Kf7 17.Bb2 (17.ba7 Be7 18.Ba5 Ra7=) 17...Be7 (17...ab6 18.Rd1=+) 18.ba7 Ra7 19.0–0 (19.Nh4 Rd8=) 19...Nd6 (19...Rc8 20.Rac1=+) 20.Nd6 (20.Qc5 Nc4 21.Qa7 Nb2 22.Qb7 Nc4=) 20...Qd6 (20...Bd6 21.Nd2=+) 21.Rfd1 Qa6=+ 22.Qb3 c4 23.Qc3 b5 24.h3 Rd8 25.Rd8= Bd8 26.Rd1 Be7=+ 27.Ra1 Be4 28.Nd2 Bd3 29.Qd4 Qb7 30.Nf3 Ra8 31.Ng5? Kg8 32.Ne6 Ra6 33.Nc5=+ Bc5 34.Qc5 Rc6 35.Qd5+/– Kf8 36.Bc3 Ke8? 37.Ba5 Qa6 38.Qg8+– Kd7 39.Qd8 Ke6+/– 40.Qe8 Kf5?? 41.g4 Kg5 42.Qh5# 1–0. Gross,Wilhelm – Merten,Rainer, xxiv/17, 1993.

7.Qb3= Qe7 8.a3 ed4 9.Bd4 Ne4 10.Nf3 c5 11.bc5 Nec5 12.Qb2 Nd3 (12...Be6 A) 13.Bg7?? Bc4 14.Bf8 Rf8–+ (worse is 14...Qf8 15.Qd4 Nd3 16.Kf1 N3e5 17.Ke1–+); B) 13.Bb5+=) 13.Bd3 Bd3 14.Bg7 (worse is 14.Qb7 Rb8 15.Qa7 Rb1 (worse is 15...Bb1 16.Ne5 Be4 17.f3+/–) 16.Rb1 Bb1+=) 14...Rg8 15.Bf8 (15.Qb7? Rb8 16.Qc7 Bg7–+ (16...Bb1?! 17.Bf8 Kf8 18.0–0–+; 16...Rb1?! 17.Rb1 Bb1 18.Ne5 Ne5 19.Qb8 Qd8 20.Qe5 Be7 21.0–0–/+)) 15...Kf8 16.g3 (16.Nc3 Rg2 17.Qb7 Rb8+=) 16...Rg6 (16...Nc5!? 17.Nd4 Rd8=) 17.Nbd2+/– (17.Qb7? Be4 18.Qb4 Bf3–+) 17...Rb6?? (better is 17...Nc5+/–) 18.Qh8# 1–0. Gross,Wilhelm – Merten,Rainer, xxiv/19, 1993.

7.Qb3= Qe7 8.a3 e4 9.Nc3 =.

7.Qb3= Qe7 8.de5 Ng4 9.Nf3 Qb4 10.Nbd2 Qb3 11.ab3 Nb6 =.

6.Nf3 e6

7.a3 Bd6 =.

7.Qb3!? Nb6 8.Be2 h6 9.d4 Bd6 10.Nbd2 0–0= 11.0–0 c6 12.h3 Rc8 13.Rac1 Bb8 14.a4 Ne4 15.a5?! (15.Ne4 Be4 16.a5 Bd5 17.Qc2) 15...Nd5 16.Ne4 Be4 17.Nd2 Bg6 (17...Qd6 18.f4 Bg6 19.Rc4=) 18.f4 Qe7?! (18...Bd6) 19.b5 cb5 20.Bb5 Bd6 21.Be2 Rfd8 22.Bf3 Nb4?! (22...Bb4 23.Nc4) 23.Be4! Be4 24.Ne4 Nc6?! (24...b6) 25.Nd6 Qd6 26.Rc5 (26.Qb7 Rb8) 26...Qd7 (26...Nd4!?) 27.Rfc1 Ne7 28.e4! Rc5 29.Rc5 Rc8 30.Rb5 Rc7 31.d5! ed5 32.Be5 a6 33.Rb6 Rc1 34.Kh2 de4 35.Rb7 Qd8 (35...Qd5) 36.Qa3 Rc2 37.Re7 Rg2 (37...Qd2 38.Qg3+–) 38.Kg2 Qd2 39.Kg3 Qe1 40.Kg4 Qe2 41.Kh4 g6 42.Re8 1–0. Gross – Merten, 1993 (Gross).

7.b5 Be7 8.0–0 Nc5 9.d4 Nce4 10.Nh4?! (10.Nbd2=) 10...Bg4! 11.Qb3 Nd6 12.Bd3?! (12.Nd2) 12...Nd5 13.e4!? Nf4 (13...Ne4!?) 14.e5?! Bh4 15.ed6 Qd6 16.f3! Nd3 17.Qd3 Bf5 18.Qc4 Rd8 (18...0–0? 19.Ba3!) 19.Nd2 Be7 (19...0–0) 20.a4 Qb4 (20...Qf4) 21.Qb4 Bb4 22.Ne4 0–0 23.Rac1 Ba5 24.Nc5 Bb6 (24...Bd2!) 25.Nb7 Bd4 26.Bd4 Rd4 27.Nc5= Rc8 28.g4 Bg6 29.h4 h5 30.gh5 Bh5 31.Kg2 c6 32.Ne4 Ra4 33.bc6 f5 34.Ng5 Bf7 35.c7 Rh4?? 36.Rfd1 1–0. Gross – Merten, 1992 (Gross).

7.a3 c5

8.b5 Be7 9.0–0 0–0 10.Be2 Nb6 11.d3 Qd7 12.a4 Rfd8 13.Ne5 Qc7 14.Nd2 Bd6 15.Ndf3 Nbd7 16.Nc4 Be7 (16...e5 17.a5=) 17.h3 (17.Nh4 Ng4 18.Bg4 Bh4 19.Bf5 ef5+/–) 17...Nb6= 18.Rc1 (18.Nce5 Bd6=) 18...Rac8 (18...Nc4 19.Rc4 a6 20.ba6 Ra6 21.Nh4=) 19.Qb3 (19.Nh4 Rd5+=) 19...Nc4= 20.Rc4 Bg6 (20...Nd5 21.Nd4=) 21.Rd1 (21.Nh4 Bh5 22.g4 Bg6+=) 21...Nd5 22.Rdc1 (22.Ne5 Bf5=) 22...b6 (22...Bd6 23.Qc2=) 23.Ne5+= Bf6 24.Ng6 Bb2 25.Qb2 hg6 26.d4 Qe7 27.dc5 Rc5 28.Bf3 Rdc8 29.Bd5 ed5 ½–½. Gross,Wilhelm – Merten,Rainer, 1991.

8.b5 Bd6

9.0–0 Nb6 10.Be2 0–0 =+.

9.Nc3 0–0 10.h3 (10.d4 Nb6 11.Be2 Nbd5=+) 10...h6 (10...Ne5 11.Ne5 Be5 12.f4–/+) 11.0–0=+ Ne5 12.Be2 (12.Ne5!? Be5 13.f4=+) 12...Nd3–/+ 13.Bd3 Bd3 14.Re1 e5 15.e4 Re8 16.Re3 c4 17.Nh4 (17.Rc1 a6 18.Qa4 Bc5 19.ba6 Ra6 20.Rd3 Qd3–+) 17...Bc5–+ 18.Re1 Qb6 (18...a6 19.ba6 Ra6 20.Nf5–+) 19.Qf3–/+ Rad8 20.a4 a6 21.a5 Qe6 22.ba6 ba6 23.Na4 (23.Nf5 Rb8 24.Qg3 Nh5–+) 23...Bd4 (23...Bb4 24.Nc3–/+) 24.Bd4 Rd4 (24...ed4?! 25.Nc5 Qe7 26.Nd3 cd3 27.Nf5+=) 25.Nc5 Qc6 26.Nd3 cd3 (26...Rd3 27.Qe2–/+) 27.Rac1 (27.Nf5 Re4 28.Qd3 Re1 29.Re1 Qe6=+) 27...Qa8 (27...Qa4!?=+) 28.Nf5= Re4 29.Qd3 Rf4 30.Ne3 (30.Rc7 e4 31.Nh6 Kh7+–) 30...Rd8 31.Qc2 Ne4 32.Re2 Nd6 33.Qc6 ½–½. Gross,Wilhelm – Merten,Rainer, xxiii/18, 1992.

9.d3 =. Gross.

9.h3 Nb6 10.d3 –/+.

9.h3 h6 10.0–0= 0–0 11.d4 Rc8 12.Nbd2 Nb6 13.Be2 Qe7 (13...c4 14.Rc1 Bd3 15.Bd3 cd3 16.Qb3+=) 14.dc5= Bc5 15.Nd4 Bg6 16.a4 (16.N2b3 Bd6=) 16...Rfd8 17.Qb3 (17.a5 Nbd5=) 17...Bd4= 18.Bd4 Bc2 (Black gets deadly initiative) 19.Qa2 e5 (19...Na4 20.Nc4 Rd4 21.ed4+–) 20.Rfc1 (20.Rac1 ed4 21.Rc2 de3–/+) 20...ed4 21.Rc2 de3 22.Rc8 Nc8 (22...ed2 23.Rd8 Qd8 24.a5+/–) 23.Nf3 ef2 24.Kf2 Ne4 25.Kf1 Qc5 (26.Qf7 Kf7 27.Ng5 Qg5–+) 0–1. Gross,Wilhelm – Merten,Rainer, xxiii/24, 1992.

9.0–0 0–0

10.Nc3 Rc8 11.h3 (11.d4 Nb6 12.Be2 c4=+) 11...Ne5 (11...Nb6 12.Be2=+) 12.Ne5 Be5 13.f4 Bb8 14.Rf2 (14.d3 Qd6=) 14...Bd3 15.Bd3 Qd3 16.Qf3 b6 (16...Rc7 17.e4 Qf3 18.Rf3=) 17.a4 (17.e4 Rfd8 18.e5 Ne8=) 17...Rcd8 18.Qg3 Kh8 19.Qf3 Rd7 20.Qg3 Rfd8 21.Rc1 Bd6 22.Qf3 Be7 23.Qd1 Qg6 24.Qc2 Rd3 25.Kh1 Nh5 (25...c4 26.Kh2–/+) 26.Kg1 Bh4 27.Re2 Ng3 28.Rf2 Qh5 (28...c4 29.Ba1–/+) 29.Qd1 =+. Gross,Wilhelm – Merten,Rainer, xxi/28, 1991.

10.Nc3 Ne5 11.Ne5 Be5 12.Qe2 Qe7 (12...Ne4 13.f4 Bf6 14.Rad1=+) 13.f4= Bc7 14.h3 (14.e4 Bg4 15.Qe3 Rfd8=) 14...Rfd8 15.Rf2 (15.e4 Bg6=) 15...h6 (15...Qd6 16.e4 Bg6 17.e5+–) 16.Qf3 Ba5 17.g4 (17.Rc1 Bd3 18.Bd3 Rd3=) 17...Bh7 (17...Bc3 18.Bc3 Bd3 19.Bd3 Rd3 20.Bf6 Qf6 21.Qb7 Qa1 22.Rf1 Qa3 23.Qa8 Kh7 24.Qe4 Kh8 25.Qa8 Kh7 26.Qe4 Kg8 27.f5=) 18.g5 Bc3 19.Bc3 hg5 (better is 19...Ne4 20.Rg2 hg5 21.fg5 Nc3 (< 21...Ng5 22.Qg4 f6 23.h4+=) 22.dc3 Bd3=+) 20.Bb2?? (20.fg5 Ne4 21.Rg2=+) 20...Ne4–/+ 21.Rg2 Rd2 (21...Nd2 22.Qe2 Be4 23.Rg3–+) 22.Rd2 (22.fg5 Rg2 23.Qg2 Rd8–+ (23...Ng5 24.h4+–)) 22...Nd2–+ 23.Qe2 Rd8 24.Rd1 Nc4 (24...Qd6 25.Kg2 gf4 26.ef4 Qf4 27.Qg4 Be4 28.Kg1 Qe3 29.Kh2 Qf2 30.Qg2 Qg2) 25.Rd8 Qd8 26.Qc4 Qd1 27.Qf1 Qf1 28.Kf1 gf4 29.ef4 Bd3 30.Kf2 Bb5 31.Be5 ½–½. Gross,Wilhelm – Merten,Rainer, xxiii/20, 1992.

10.d3 Nb6 =+.

10.d4 Qc7.

10.d4 Rc8

11.dc5 Nc5 12.Be5 Be5 13.Ne5 Qc7 =+.

11.Nbd2 Nb6 12.Bb3 Bd3–/+ 13.Re1 Bb5 14.a4 (14.dc5 Rc5 15.Bd4 Rc6–/+) 14...Bc6 (14...Bd3 15.dc5 Rc5 16.Bd4–/+) 15.a5 (15.Rc1 Bd5–/+) 15...Nbd7 (15...Nbd5 16.dc5 Bc5 17.Nd4–/+) 16.e4 Bb8 17.d5 (17.Bc4!?–/+) 17...ed5–+ (Black gets the initiative) 18.ed5 Bd5 (Opening the e–file gets Black a lot of play) 19.Nc4 (19.Bd5 Nd5 20.Nc4 Nb4–/+) 19...Re8–+ 20.Qd3 (20.Ne3 Be4–+) 20...Qc7 21.g3 b5 22.ab6 ab6 23.Ba4 Qb7 (23...Be4 24.Qc3 Rcd8 25.Bb5–+) 24.Ncd2? (better is 24.Re8!? Ne8 25.Ng5–/+) 24...c4 25.Re8 Re8 (26.Qc3 b5–+) 0–1. Gross,Wilhelm – Merten,Rainer, xxiii/06, 1992.

11.Nbd2 Nb6 12.Rc1!? =+.

11.Nbd2 Nb6 12.dc5 Rc5 13.Be2 =+.

11.Nbd2 Nb6! 12.Be2 cd4.

11.Nbd2 Ne4 12.Rc1 Qe7 13.Qb3 (13.d5 ed5 14.Bd5 Ndf6 15.Ne4 Nd5 16.Nd6 Qd6=) 13...cd4 (13...Nd2!? 14.Nd2 cd4 15.ed4 Nb6=+) 14.Ne4= Be4 15.ed4 Nb6 16.Be2 Bd5 17.Qe3 Nc4 18.Bc4 Bc4 19.Rfe1 Bb5 20.d5 Rc1 (20...ed5 21.Qe7) 21.Qc1 (21.Bc1 Bc5 22.Qb3 Bd7 23.Qb7 Rd8=) 21...Bd7 (21...Rd8!?–/+) 22.Qc3 f6 23.de6 Be6 24.Qe3 Re8 25.Qa7 Bc5 26.Qa4 Qd7 27.Qc2 b6 28.Rd1 Qb5 29.Qc3 (29.Nd4 Qc4=+) 29...Qe2–/+ 30.Rf1 Bc4 (31.Rc1 Qf2 (31...Bf2?! 32.Kh1 Bd5 33.Ng1–+) 32.Kh1 Bd5–+) 0–1. Gross,Wilhelm – Merten,Rainer, 1991.

5.Bc4 e6

6.a3 a5 7.Qa4 c6 8.Bf6 Qf6 9.d4 =+.

6.a3 Bb1 7.Rb1= Be7 8.Nf3 Nc6 9.0–0 0–0 10.d4 Ne4 (10...Bd6 11.Qc2+=) 11.Bd3 f5 12.Qb3 Qd6 13.Be4 (13.Qc2 Ng5 14.Ng5 Bg5+/–) 13...fe4 14.Nd2 Qd5 15.Qc2 Rf6 (15...a5!? 16.ba5 Ra5 17.Ne4 Rfa8+/–) 16.b5! Qb5 17.d5! Discovered attack (17.Qe4?! Bd6=; 17.Ne4?! Rf7+=) 17...Qd5 (17...ed5 18.Bf6) 18.Bf6 Bf6 19.Rb7 (19.Ne4 b5+–) 19...Rd8?? (better is 19...Nd4 20.Qe4 Ne2 21.Kh1 Qd2 22.Qe6 Kh8 23.Rc7 Rd8+=) 20.Rc7+– Ne5 (20...Qd2 21.Qc6 Qd5 22.Qd5 ed5 23.Ra7+–) 21.Ne4 Ng4 (21...Rd7 22.Rc8 Rd8 23.Rd8 Qd8 24.Rd1+–) 22.Nf6 (better is 22.h3 Be5 23.Rc5 Bh2 24.Kh1 Qd7+–) 22...Nf6 23.Qc5 (23.Qc5 Qc5 24.Rc5+–; better is 23.Ra7!? Rf8+–) 1–0. Wall,Bill – Holsapple,Boyd, Dayton, OH, 1985.

6.a3 c5 7.b5 Nbd7 8.Nf3 Rc8 9.0–0 Be7 10.Nc3 0–0 11.Be2 h6 12.d4 Bh7 13.Qa4 cd4 14.Nd4 (14.Qd4 Qa5=) 14...Nc5+= 15.Qd1 (15.Qa7?? Ra8 16.Qa8 Qa8–+) 15...Qb6 16.Na4? (better is 16.f4=) 16...Na4–+ 17.Qa4 e5 18.Nf3 (18.Bf3 Rc5–+) 18...Rc2 19.Be5 Re2 20.Rfc1 (20.Bd4 Qe6–+) 20...Bd3 (20...Ne4 21.Bd4 Bc5 22.Bc5 Nc5 23.Qd4–+) 21.Bd4? (21.Nd4 Rf2 22.Kf2 Ng4 23.Kg1 Ne5 24.Rc3–+) 21...Qb5 22.Qa7 (22.Qb5 Bb5 23.Ba7 Ra8–+) 22...Ne4 23.Rc7 (23.a4 Qf5 24.Rf1–+) 23...Bf6 (23...Rf2 24.Qb7 Qf5–+) 24.Rb7 Qf5 25.Bf6 Qf6 26.Rd1? Nf2 (26...Nf2 27.Rb8 Nd1 28.Rf8 Kf8 29.Qb8 Ke7 30.Qb7 Ke8 31.Qa8 Qd8 32.Qa4 Qd7 33.Qd1 Rb2–+) 0–1. Gross,Wilhelm – Merten,Rainer, xxiv/21, 1993.

6.a3 c5 7.bc5 Bc5 8.Nf3 0–0 9.0–0 Bg4 10.d4 Bb6 11.Nbd2 Nc6 12.h3 Bh5 13.Qa4 Rc8 14.Rac1 Qe7 15.Bb5 Nb8 16.Ne5 Rfd8 (16...Nd5!?+=) 17.Rc8+/– Rc8 18.Ndc4 Bd8 19.Qa7 Be2 20.Rb1 Bc4 21.Rc1 Nc6 22.Nc6 bc6 23.Qe7 Be7 24.Bc4 (< 24.Rc4 Rb8 25.Rc6 Rb5 26.Rc8 Bf8–/+) 24...Ra8 25.Bd3 g6 26.e4 Ra5 27.Rc6 Ba3 28.Bc3 Ra7 29.d5! Nd7 (29...Nd5 30.ed5) 30.Rc8 Nf8 31.Bd4 Rb7 32.Be5 ed5 33.ed5 Rd7 34.Bc4 h5 35.Kf1 Kh7 36.f4 (36...h4 37.Bf6+–) 1–0. pierred – starior78, Yahoo, 2005.

6.a3 c6 7.Nc3 Nbd7 8.Nf3 Bd6 9.d4 0–0 10.Bd3 a5 A) 11.b5 cb5 (11...Bd3 12.Qd3 Rc8 13.e4 Nh5 14.0–0 Qb6 15.e5 Be7 16.Qe3 f5 17.ef6+=) 12.Bf5 (12.Nb5 Bd3 13.Qd3 Qe7 14.e4 Bf4 15.a4 Rfd8 16.0–0 Nb6 17.Ba3=; 12.e4 Bg4 13.Nb5 Be7 14.0–0 Rc8 15.Qe2 Rc6 16.h3 Bh5 17.Qe3+=) 12...ef5 13.Nb5 Qe7 14.Nh4 g6 15.0–0 Rfd8 16.Rc1 Nd5 17.Nf3+=; B) 11.e4 B1) 11...Bg6 12.e5 (12.b5 e5 13.bc6 bc6 14.Qc2 ed4 15.Nd4 Nc5 16.Rd1 Nfe4 17.Nc6–/+) 12...ab4 13.ab4 Ra1 14.Ba1 Bb4 15.ef6 Qa5 16.Kd2 Nf6 17.Bg6+=; B2) 11...ab4 12.ab4 Ra1 13.Ba1 Bg6 14.e5 Bb4 15.ef6 Qa5 16.Kd2 Nf6 17.Bg6+=; C) 11.Bf5 ef5 12.b5 f4 13.e4 Re8 14.e5 Be7 15.0–0 Nd5 16.Nd5 cd5 17.Bc1+=.

6.a3 c6 7.Nc3 Nbd7 8.Nf3 Bd6 9.d4 0–0 10.Bd3 Bd3 11.Qd3 e5 (11...a5 12.b5 (12.ba5 Qa5 13.0–0 Rfd8 14.e4 e5 15.Rfd1 ed4 16.Nd4 Qh5 17.h3+=) 12...Rc8 13.e4 Nh5 14.0–0 Qb6 15.e5 Be7 16.Qe3 f5 17.ef6+=; 11...Nd5 12.Ne4 (12.0–0 N7b6 13.Rfc1 Nc3 14.Bc3 Nd5 15.e4 Nf4 16.Qd2 Bc7 17.Qe3=; 12.Rb1 a5 13.Ne4 Be7 14.b5 cb5 15.Qb5 Nc7 16.Qe2 b5 17.0–0=; 12.Ne2 a5 13.b5 cb5 14.Qb5 Ra6 15.Bc1 Ra7 16.e4 Nc7 17.Qg5=) 12...N7f6 13.Nd6 Qd6 14.Ne5 Nb6 15.Qc2 Nfd7 16.0–0 Rad8 17.Rad1=; 11...Qb6 12.e4 (12.0–0 a5 13.b5 Rfc8 14.Rab1 c5 15.Na4 Qd8 16.dc5 Nc5 17.Nc5+=; 12.Rb1 Rfd8 13.0–0 Nd5 14.e4 Nc3 15.Bc3 Bf4 16.Rfe1 Ne5 17.Qe2=) 12...Be7 13.Nd2 Rfd8 14.0–0 Qc7 15.Rfd1 Qf4 16.Bc1 Qc7 17.Nb3+=; 11...Nb6 12.e4 (12.0–0 Nfd5 13.Rfc1 Nc3 14.Bc3 Nd5 15.e4 Nf4 16.Qd2 Bc7 17.Qe3=; 12.Rc1 Nbd5 13.0–0 a5 14.b5 Nc3 15.Rc3 Qb6 16.e4 Qb5 17.Qb5+=) 12...Nh5 13.e5 Be7 14.Bc1 f5 15.0–0 Nd5 16.Rb1 Nhf4 17.Bf4=) 12.Rd1 (12.e4 ed4 13.Qd4 Bf4 14.Rd1 Qe7 15.Ne2 Bc7 16.Nh4 g6 17.Qe3+=; 12.0–0 Re8 13.Qf5 ed4 14.Nd4 Qc7 15.h3 Ne5 16.Rfc1 Qe7 17.Rc2=; 12.Qf5 Re8 13.0–0 ed4 14.Nd4 Qc7 15.h3 Ne5 16.Rfc1 Qe7 17.Rc2=) 12...Re8 (12...Qe7 13.de5 Be5 14.0–0 Rad8 15.Qf5 Rfe8 16.Ne5 Qe5 17.Qe5=) 13.de5 Be5 14.Ne5 (14.0–0 Qe7 15.Rd2 a5 16.ba5 Ra5 17.Rfd1=) 14...Ne5 15.Qd8 (15.Qf5 Qc7 16.0–0 a5 17.Rd4=) 15...Rad8 16.Ke2 Nc4 17.Bc1 (17.Rd8=) 17...g6 18.h3 h5 19.Rd8 Rd8 20.Rd1 Rd1 21.Kd1 Kf8 22.Ke2 (22.e4 Ke7=) 22...Ke7 (22...Nd7 23.e4=) 23.f4 (23.Kd3 b5+=) 23...Ke6 (23...Nd5 24.Ne4=) 24.Kd3 b5 25.e4 a6 26.Ne2 Nd7 27.Nd4 Kd6 28.g4 hg4 29.hg4 c5 30.Nf3 a5 31.ba5 Na5 32.Ng5 f6 33.Nf3 c4 34.Kc3 Nc5 35.e5 fe5 36.Ne5 Nab3 37.Be3 Ne4 38.Kb4+/– Nbd2 39.Bd2 Nd2 40.Ng6 Nf3 41.f5 Kc6 42.f6 Ng5 43.Ne5 Kd5? 44.f7 Nh7 45.Nf3 Ke4 46.Ng5!! (46.Ng5 Ng5 47.f8Q+–) 1–0. Schoenegg,Rolf – Kratochvil,J (2025), Open, Marianske Lazne CZE, 2004.

6.a3 c6 7.f3 +=.

6.a3 Bd6 7.d3 Nbd7 8.Nf3 0–0 9.e4 Bg4 10.Nbd2 Ne5 11.Qc2 Bf3 12.Nf3 Nf3 (worse is 12...Nc4 13.dc4 Nd7 14.Rd1+=) 13.gf3 Bf4 14.Ke2 (14.b5 Kh8+=) 14...Nh5 15.Rag1 Qe7 16.Rg2 Rad8 17.Rhg1 Bh6?? (17...e5 18.b5+=) 18.Bc1?? (better is 18.Qd2! Bd2 19.Rg7 Ng7 20.Rg7 Kh8 21.Rf7 e5 22.Re7+–) 18...Bc1 19.Qc1 e5?? (better is 19...Qf6 20.Rg4 Kh8+=) 20.Rg7!! Kh8 (20...Ng7 21.Qh6 Mate attack) 21.Qh6 Nf6 (21...Ng3 22.R1g3 Qb4 23.Qh7) 22.Rh7! (22.Rh7 Nh7 23.Qg7#) 1–0. Bartle,Georg (1710) – Strasser,Manuel, Baden–ch AT3, 2005.

6.a3 Bd6 7.Nf3 0–0 8.Nc3 Nbd7 9.Rc1 Bg4 10.Be2 Rb8 (10...a5!? 11.Nb5 ab4 12.Nd6 cd6 13.ab4 e5+=) 11.Nb5+= a6 12.Nd6 cd6 13.0–0 d5 14.d3 Rc8 15.Qd2 Nb6 (15...Rc1 16.Rc1 Re8 17.Ne5 Be2 18.Qe2 Ne5 19.Be5+=) 16.Ne5 Be2 17.Qe2 Nfd7 (17...Qd6 18.Bd4+=) 18.Qg4 Ne5 19.Be5 Threatening mate: Qxg7 19...g6 20.Qf4 Nd7 21.Bb2 Qe7 (21...Qb6 22.a4+=) 22.Qd4 (22.Rc7 Rc7 23.Qc7 Rb8+/–) 22...f6+= 23.Rfd1 Qd6 24.Qg4 Ne5 25.Qf4 g5 26.Qg3 Rfd8 27.f4 Rc1 28.Bc1 Nf7 29.Bb2 Qe7 30.Rc1 h6 31.fg5+/– fg5 32.Qf3 Rf8 33.Qh5 e5 34.Qg6+/– Kh8 35.Rf1 Qc7 36.Qe6 Kg8 37.Rf6 Qc2 38.Be5 Qd3?? 39.Rg6 (39.Rg6 Kh7 40.Rg7 Kh8 41.Rf7 Kg8 42.Rb7 Rf7 43.Qf7#) 1–0. Schmidbauer,Josef – Bergmann,Ralf, Niederbayern–chB, 2000.

6.a3 Be4 7.Nf3= c5 (7...Bd5 8.Bf6 Qf6 9.Bd5 Qa1 10.Bb7+–) 8.b5 (8.d3 Bf5=) 8...Nbd7 9.Nc3 Nb6 (9...Bf3 10.Qf3 Ne5 11.Qe2=) 10.Be2 Bd3 11.Ne5 Bg6 (11...Be2 12.Ne2 Bd6 13.d3=) 12.Bf3+= Nbd5 13.Nd5 ed5 14.0–0 Bd6 15.h3 (15.Ng6 hg6 16.h3 Qd7+=) 15...Bf5 (15...Be4 16.d3 Bf3 17.Qf3= (< 17.gf3 0–0=+)) 16.d4 (16.Ng4 Bg4 17.hg4 Bc7=) 16...c4 17.Re1 (17.Qa4 0–0=) 17...0–0=+ 18.Bd5? (18.Qa4 Ne4=+) 18...Be5?? (18...Nd5 19.e4 c3 20.Bc1–/+) 19.Bb7 Rb8?? 20.de5+/– Nd7 21.Qf3 Bd3 22.Bc6 Nc5 23.Qg4 Qe7 24.e4 Ne6 (24...Rfd8 25.Qf5+–) ½–½. Gross,Wilhelm – Merten,Rainer, xix/20, 1990.

6.a3 Ne4 7.Nf3 Nc6 (7...Nd6 8.Be2=) 8.0–0 Bg4 9.Be2 a6 10.Nd4 Be2 11.Ne2 Qg5 12.f4 Qg6 13.Nbc3 0–0–0 14.Ne4 Qe4 15.Nd4 Nd4 16.Bd4 f6 17.Qb3 Bd6 18.b5 e5 19.fe5 fe5 20.Bc3 ab5 21.Qb5 c6 22.Qb3 Rhe8 23.Rf7 c5 24.Rb1 Bc7 25.Rg7 c4 26.Qb5 Rg8 27.Rc7! Kc7 28.Be5 Kc8 29.Qc5 Qc6 30.Qc6 bc6 31.Bc3 Rg4 32.a4 Rd6 33.a5 c5 34.Rb5 Rdg6 35.Rc5 Kb7 36.g3 R4g5? (better is 36...R6g5 37.Rg5 Rg5+–) 37.Rc4 h5 38.Rf4 Ka6 39.e4 Rh6 40.Kf2 Rb5 41.e5 Kb7 42.Re4 Kc7 (42...Re6 43.g4+–) 43.e6 Kd8 44.d4 (44.a6 Rb8 45.a7 Ra8+–) 44...Rf6 (44...Ke7 45.a6 Rf6 46.Ke2 Rb3+–) 45.Ke3 (better is 45.Kg2 Rb3 46.Re3+–) 45...Rb3+= 46.d5 Rc3 47.Kd4 Ra3 48.Ke5 Rf2 (48...Rh6!?=) 49.Rh4+= Ra5 50.Rh5 Ke7 51.Rh7 Ke8 52.Rh8 (better is 52.h4!?+/–) 52...Ke7= 53.Rh7 Ke8 54.Rh8 (better is 54.h4!?+/–) 54...Ke7= 55.Rh7 ½–½. purplegadge (1725) – sastro (1705), gameknot.com, 2014.

6.Qb3 Nc6 7.b5 Na5 8.Qc3 Nc4 9.Qc4 –/+.

6.Qb3 Nbd7 7.Nf3 Nb6 8.Be2 a5 (8...Bd6 9.0–0=) 9.ba5= Ra5 10.0–0 Be7 11.d4 (11.Bd4 c5 12.Bc3 Ra7=) 11...0–0 12.Rc1 Bd6 13.Ba3 Bb1 14.Bd6 Qd6 15.Rab1 Rfa8 16.Rb2 Rh5 (16...Ra3!? 17.Qc2 Nfd5=) 17.Ne5 Rh6 18.Qc2 Qa3 (18...Nfd5!?+=) 19.Rb3+/– Qa2 20.Qa2 Ra2 21.Rb6 Re2 22.Rb7 Ne8 23.Rb8 Kf8 24.Kf1 Ra2 (24...f6 25.Ke2 fe5 26.Rc7 ed4 27.ed4+–) 25.Rc7 (25.Rc7 Rf6 26.f4+–) 1–0. Capel,Evan Timothy (2125) – Browne,Jeremy (2100), 43rd North Shore Open, 2016.

6.Qb3 Nbd7 7.Nf3 Be4 8.d3 Bf3 9.gf3 +=.

6.Qb3 Nbd7 7.Nf3 h6 8.0–0 Bd6 9.h3 (9.d3 c6 10.e4 Bg4=) 9...Rc8 (9...a5 10.ba5 Nc5 11.Qb4+=) 10.Be2 (10.d3 Bg6+=) 10...a6 11.d3 White launches an attack 11...e5 12.d4 ed4 (better is 12...e4!? 13.Nfd2 0–0=) 13.Nd4+= (worse is 13.Bd4 0–0=; worse is 13.ed4 Be6 14.Bc4 Bc4 15.Qc4 0–0+=) 13...Be4 14.Nd2 (14.Nc3 Be5+/–) 14...Bd5+= 15.Bc4 Bc4 16.Nc4 0–0 17.Rac1 Ne5 (17...Be7 18.Nf5+/–) 18.Ne5 (worse is 18.Nd6 cd6 19.Rc8 Qc8+=) 18...Be5 19.Ne6! fe6 (19...Qd5!? 20.Qd5 Nd5 21.Nf8 Bb2+/–) 20.Qe6+/– Theme: Double Attack (20.Be5?! Qe7+=) 20...Rf7 21.Qe5 Qd5 (21...Qd3 22.Rfd1 Qg6 23.Rd6+/–) 22.a3 (22.Qd5 Nd5 23.a3 Re8+/–) 22…Qe5 (22...Qa2 23.Qf5 Re8 24.Bf6 Rf6 25.Qd7+/–) ½–½. Gross,Wilhelm – Merten,Rainer, xiv/23, 1987.

6.b5! Bd3 7.Qb3! Bc4 8.Qc4 Qd5? 9.Qc7! Gross.

6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4).

6.a3 Nbd7

7.d3 Nb6 =.

7.d4 Nb6 8.Bb3 Be7 9.Nf3 0–0 10.Nc3 Nbd5 11.Nd5 Nd5 12.0–0 Bd6 13.Re1 Be4 14.Rc1 Qf6 15.Nd2 Qh4?? (better is 15...Bd3=) 16.Ne4?? (16.g3 Ne3 17.fe3 Bg3=) 16...Qh2?? (16...Bh2 17.Kf1 Qe4=+) 17.Kf1+– Qh1 18.Ke2 Qg2 19.Bd5 ed5 20.Nf6 Kh8?? (20...gf6 21.Rg1) 21.Rg1+– Qh3 22.Rh1 Bh2 23.Qg1 Bg1 24.Rh3 gf6 25.Rg1 Rg8 26.Rg8 Kg8 27.f3 Re8 28.Kd3 Kg7 29.Rg3 Kh6 30.Bc1 c6 31.e4 Kh5 32.Rg7 de4 33.fe4 Re7 (33...h6 34.Rf7 a5 35.Rf6 ab4 36.Rh6 Kg4 37.ab4+–) 34.Rh7 Kg6 35.Rh1 Re6 36.Rg1 Kh7 37.Bf4 Kh8 38.a4 Kh7 39.a5 a6 40.Rh1 Kg6 41.Rh6 Kg7 42.Rh5 Kg6 43.Rc5 Re7 44.d5 cd5 45.Rd5 Re6 46.Be3 Re5 47.Re5 (better is 47.Kd4 Rh5+–) 47...fe5 48.Kc4 f5 49.ef5 Kf5 50.b5 Ke4 51.Bd2 ab5 52.Kb5 Kd3 53.Bb4 e4 54.Kb6 Kc4 55.Be1 (55...Kd3 56.Kb7+–) 1–0. Loulou – Dany, HCL–B1735 playchess.de, 2003.

7.d4 c6 8.Nc3 Bd6 9.Nf3 0–0 10.0–0 Nb6 11.Bd3 Bd3 12.Qd3 Rc8 13.Rad1 Qe7 14.e4 Bb8 15.Bc1 h6 16.e5 Nfd5 17.Ne4 f5 (17...Nd7!?=) 18.ef6+= Nf6 19.Nc5 Ng4 (19...Nfd5!?+=) 20.Qg6 Rf3 21.Qg4 (21.gf3 Qh4 (21...Bh2?? 22.Kg2+–) 22.Qe6 Kh8 23.Qe5 Be5 24.h3 Qh3 25.Bf4 Bf4 26.Rfe1 Qh2 27.Kf1 Qf2) 21...Rf6 22.Ne4 Rf5 23.Bh6 Kh7 24.Bg5 Qf7 25.Rd3 Kg8 26.Rh3 Qg6 27.Qh4 Kf7 28.g4 Rd5+/– 29.Rf3 Kg8 30.Re1 Nc4 31.Be7 Re8 32.Bf6 Nd6 33.Nd6 Bd6 34.Be5 Be5 35.de5 Qh6 36.Qh6+/– gh6 37.Rf6 Kg7 38.f4 a5 39.Re3 ab4 40.ab4 Rd1 41.Kf2+– Rd2 42.Re2 Rd4 43.Rb2 Rd3 44.b5 c5 45.Rc2 Rd5 46.Kg3 b6 47.Kf3 Rd3 48.Ke4 Rd4 49.Ke3 Rd7? 50.Rb2 Rf8? 51.Rf8 Kf8 52.h4 Rd1 53.Ra2 Rb1 54.Ra7 Ke8? 55.Rh7+– Rb5 56.Rh6 Rb3 57.Ke4 Rb4 58.Kd3 Rf4+/– 59.Re6 Kf7 60.Rb6 Rg4 61.Rc6 Rh4= ½–½. Mrazek,Lumir (2040) – Pfeffer,Erik (1855), CZE–ch U14, 2007.

7.d4 Be7 8.Nf3 0–0 9.Nbd2 Nb6 10.Be2 Ne4 (10...a5 11.b5=+) 11.0–0 Nd6 12.Rc1 Rc8 13.Re1 Nd7 (13...Nd5 14.Ne5=) 14.Bf1 (14.Qa4 a6+=) 14...Bg4 (14...Nf6 15.Qa4=) 15.h3 Bh5 16.Qb3 Nf6 17.e4 Nde8 18.Rc2 c6 19.Nh2 (19.Bd3 Nd6+=) 19...Nc7 20.Qg3 Bg6 (20...Qd6 21.e5 Qd5 22.Bc4+– (22.ef6 Bf6 23.Rc5 Qa2+–)) 21.Nhf3+= Nb5 22.Bb5 cb5 23.Rc8 Qc8 24.Rc1 Qb8 (24...Qd8 25.Qe5+=) 25.Qc7 (25.Qb8 Rb8 26.Rc7–/+) 25...Bd6= 26.Qc2 Bf4 27.Re1 Rc8 28.Qd1 (28.Qd3 Bd2 29.Nd2 Qf4=) 28...Qc7 (29.d5 e5=). Gross,Wilhelm – Merten,Rainer, xxiii/08, 1992.

7.Nf3 a5 8.0–0 (8.b5 Bd6=) 8...ab4+= 9.ab4 Ra1 10.Ba1 Bb4 (10...Nb6 11.Bf6 gf6 12.d3+=) 11.Qb3 (11.Bf6 gf6 (11...Nf6? 12.Qa4 c6 13.Qb4+–; 11...Qf6?! 12.Qa4 Bd6 13.Qa8 Qd8 14.Qb7+=) 12.Qb3 Qe7+=) 11...c5–/+ 12.Bf6 gf6 (12...Nf6 13.d4+=) 13.Nc3 (13.d4 Bg4+=) 13...Ne5 14.Bb5 Kf8 15.Ne5 (15.Nd4 Bg6 (15...cd4?! 16.Qb4 Kg7 17.ed4=) 16.f4 A) worse is 16...cd4 A1) worse is 17.fe5 Be7 (worse is 17...dc3 18.Qb4 Kg8 19.Qc3+=) 18.Ne2 de3 19.de3 Kg7–/+; A2) 17.Qb4 Kg8 18.fe5 dc3 19.Qc3+=; B) 16...Ng4–/+) 15...fe5–/+ 16.Rd1 (16.Qb2 Rg8 17.Ra1 Rg6–/+) 16...Rg8 17.g3 (17.Be2 b6–/+) 17...Kg7 18.Ra1? (better is 18.d4!?–/+) 18…Qd2–+ (18...Qd2 19.Na4 Ra8–+) 0–1. Cornacchini,Gabriele – Udvari,Norbert, RL–2007–0–00090, 2007.

7.Nf3 Nb6 8.Bb3 Bd6 9.d3 0–0 10.e4 Bg6 11.e5 Be5 12.Ne5 Bh5 13.Qd2 Nfd7 14.Nd7 Qd7 (14...Nd7 15.0–0+–) 15.0–0 (15.Qg5 Bg6 16.Qe5 f6 17.Qe6 Qe6 18.Be6 Bf7+–) 15...Rfd8 16.Nc3 (better is 16.Qg5 g6 17.Qe5+–) 16...Qd3+/– 17.Qd3 Rd3 18.f3 Rad8 19.Rad1 Bg6 20.Rd3 Rd3 21.Rd1 Rd1 22.Nd1 c6 23.Ne3 Nd5 24.Kf2 f6 25.Nc4 Bf7 26.Nd6 b5 27.Nc8 a6 28.Nd6 Kf8 29.Nb7 Ke7 30.Nc5 Nc7 31.Bc1 e5 32.Bf7 Kf7 33.f4 ef4 34.Bf4 g6?? (better is 34...Ne6 35.Bd6 Nc5 36.Bc5 Ke6+–) 1–0. Carstensen,Tim Matthias – Bartelt,Kalle, Schleswig Holstein–chB U16, 2001.

7.Nf3 Nb6 8.Bb5 (8.Be2 a5 9.ba5 Ra5=+) 8...c6 9.Be2 Be7 (9...Bd6 10.0–0=+) 10.d4 (10.0–0 a5=) 10...Qd6 (10...0–0 11.0–0=+) 11.Nbd2 Ne4 (11...0–0 12.0–0=) 12.Ne5 Nd2 13.Qd2 Bf6 14.f4 (14.Rd1 0–0=) 14...Bd8 (14...0–0 15.0–0=) 15.h3 (15.0–0 0–0=) 15...0–0 (15...Bh4 16.Kf1=+) 16.0–0= f6 17.Nf3 Na4 18.Bc1 a5 19.Bd1 Nb6 20.ba5 Nc4 (20...Nd5 21.a6 Ra6 22.Qb2=+) 21.Qb4= Bd3 (21...b5!?=) 22.Rf2 (better is 22.Bb3 Bf1 23.Kf1 Qb4 24.ab4+/–) 22...Ba5? (better is 22...Qd5+=) 23.Qb3+– Ne3 24.Be3 Be4 25.Bc2 Bd5 26.Qd3 f5 27.Ne5 Bd8 28.Bd2 Bh4 29.Rff1 Be4 30.Qc3 Bc2 31.Qc2 Qd4 32.Kh1 (32...Qe4 33.Qb1+–) 1–0. Gross,Wilhelm – Merten,Rainer, xix/18, 1990.

7.Nf3 Bd6 8.d3 c5 (8...Nb6 9.0–0=) 9.0–0 (9.bc5 Bc5 10.Nd4 Bd4 11.Bd4 a6=) 9...cb4=+ 10.e4 (10.ab4 Bb4 11.Nd4 Bg6=+) 10...Bg4 11.Nbd2 (11.ab4 Bb4 12.h3 Bh5=+) 11...ba3–/+ 12.Ba3 Ba3 13.Ra3 0–0 14.Qa1 a6 15.e5 Ne8 16.Rb1 Nb6 (16...Bf3 17.Nf3 Nb6 18.Qb2 Nc4 19.dc4+=) 17.Bb3 (17.Nd4 Nc4 18.Nc4 Ra7=) 17...Nc7 (17...Bf3 18.Nf3 Nc7 19.Bc4 Nc4 20.dc4=+) 18.d4 Nb5 19.Ra5 Rc8 20.Rc1 (better is 20.Ba4!?=+) 20...Rc1–+ 21.Qc1 Nd4 22.Nd4 Qd4 23.Rc5 (23.Qc7 Qd2 24.Ra1–+) 23...Rd8 24.Rc2 Qd2 25.Rd2+– (25…Rf8 26.Qc7+–; < 25.Qd2 Rd2 26.Rd2 Kf8=+) 1–0. McClain,Lamar C – Tollefsen,Vegard, corr IECG Cat–B, 1996.

7.Nf3 c5

8.bc5 Qa5 9.0–0 (9.Nd4 Qc5 (< 9...Bc5 10.Nf5 ef5 11.Qf3+=) 10.d3 Bg6=) 9...Bc5= 10.d4 Be7 11.Qb3 Be4 12.Nbd2 Bc6 13.Bc3 Qh5 (13...Qb6 14.Qa2=) 14.Bb4+= Bb4 15.Qb4 Nb6 16.Bb3 (16.Rfc1 Rc8+=) 16...Nbd5 17.Qc5 Nc7 (17...Nd7!? 18.Qd6 Nc3+=) 18.Qh5+/– Nh5 19.Ne5 Bd5 20.Rfc1+– Bb3 21.Rc7 Bd5 22.Nf7 0–0 23.Ne5 Rac8 24.Rac1 Rc7 25.Rc7 Nf6 26.f3 Ne8 27.Re7 Nd6 28.e4 Ba2 29.Rd7 Nb5 30.a4 Nc3 31.Rb7 Ne2 32.Kf2 Nd4 33.Ra7 Rc8 34.a5 h5 35.a6 Nb5 36.Rb7 Nd6 37.Rb6 (37.Rb6 Ne8 38.a7+–) 1–0. Roldan,Antonio – Caffaratti,Paolo, IECG, 1999.

8.bc5 Bc5

9.0–0 0–0 10.d4 Be7 11.Nbd2 Qb6 12.Qb3 h6 13.Rfc1 Rac8 14.Qb6 Nb6 (worse is 14...ab6 15.Bb5 Bg6 16.Rc8 Rc8 17.Rc1 Rc1 18.Bc1+/–) 15.Bb3 Rfd8 16.Kf1 Nbd5 17.Ke2 a6 18.Ne1 g5 (18...Bd6!?+=) 19.f3= b5 20.e4 Nf4 21.Ke3 Bh7 22.g3 Ng6 23.Nd3 Nd7 24.a4 b4 25.a5 Kf8 (25...Ra8 26.Ra4+/–) 26.Ba4 (26.Rc8 Rc8 27.Ra4 Rb8+–) 26...Nb8 27.Nb3 Bg8 (27...g4 28.Rc8 Rc8 29.Rc1 Rc1 30.Bc1+–) 28.Rc8 Rc8 29.Rc1 Rc1 30.Bc1 f6 31.Bd2 e5 32.d5 (32.Bb4?! Bb3 33.Bb3 ed4 34.Kd4 Nc6 35.Kc3 Nge5 36.Be7 Ke7 37.Ne5 fe5+/–; 32.Nb4?! Bb3 33.Bb3 ed4 34.Kd4 Bd8+/–) 32...Bf7 33.Bb4 Be8 34.Be7 Ne7 35.Be8 Ke8 36.Nbc5 Nc8 37.Nb4 Nd6 38.Kd3 Kd8 39.Kc3 (better is 39.Nba6!? Na6 40.Na6 Nb7+–) 39...Nb5 40.Kc4 Nd6 41.Kb3 Nb5 42.Nba6 Nd4 43.Kc4 Na6 44.Na6 Nf3 45.Nc5 Kc8 46.a6 Kb8 47.d6 Nd4 48.Kd5 (better is 48.d7 Nc6 49.Ne6+–) 48...Nb5 49.Nd7 (49.Nd7 Ka7 50.Nf6 Nd6 51.Kd6+–) 1–0. Melich,Jindrich (2080) – Spevacek,Ivo (1955), CZE–chT2a, 2007.

9.Qb3 Qb6 =.

9.d4 Bb6 10.0–0 Rc8 11.Nbd2 0–0 12.h3 Ne4 13.Rc1 Nd2 14.Qd2. unikum (1985) – shortseller (2135), ChessWorld.net, 2003.

9.d4 Bd6 10.0–0 Rc8 11.Qb3 0–0 12.Nbd2 Nb6 13.Rfc1 (13.Rac1 Nc4 14.Nc4 Bc7=) 13...Qe7 14.Be2 Rfd8 15.Nh4 Bg4 16.Bd3 Nfd5 (16...Nfd7 17.Nhf3=) 17.Nhf3 f6 18.Rc8 Rc8 19.Rc1 Rc1 20.Bc1 Qc7 21.Bb2 Qc6 22.Bb5 Qc8 23.h3 Bh5 24.e4 Nf4 25.a4 Be8 26.Nc4 Nc4 27.Bc4 Be7 28.Kh1 Bf7 29.Bc1 Ng6 30.Be3 Qd7 31.d5 ed5 32.Bd5 Bd5 33.ed5 Bd6 34.Nd2 b6 35.Ne4 Ne5 36.Nd6 Qd6 37.Bd2 Nd7 38.Qc4 Kf7 39.Bb4 Nc5 40.a5 g5 41.g4 Qe7 42.Kg2 Qe4 43.Qe4 Ne4 44.ab6 ab6 45.Kf3 Nc5 46.Ke3 Ke8 47.Kd4 Nb7 48.Bc3 Nd6 49.Kd3 Ke7 50.Bd4 b5 51.Bc5 Kd7 52.Kd4 Nb7 53.Ba3 Nd6 54.Bb4 Kc7 55.f3 Kd7 56.Kc5 Nc4 57.Kb5 Ne5 58.Bc5 Nf3 59.Be3 Nh4 60.Kc4+/– h6 61.Kd3 f5 62.Bf2 Kd6 63.Kc4 f4 64.Bc5 Ke5 65.Bd4 Kd6 66.Bg7 f3 67.Kd3 Ng6 68.Ke3 Nf4 69.Kf3 Kd5 70.Bh6 Ne6 71.Kg3 Ke5 72.Bg5 Ng5= 73.h4 Ne4 74.Kf3 Nd2 ½–½. Pleschke,Helmut – Utendorf,Kelvin, IECG, 2000.

9.d4 Bd6 10.Nbd2 Rc8 11.0–0 (11.Qb3 b6=+) 11...0–0 12.Rc1 Qb6 13.Qb3 Ne4 14.Ne4 Be4 15.Be6?? (better is 15.Ng5 Qb3 16.Bb3=) 15...Rc1–+ 16.Rc1 Bf3 17.gf3 Bh2 18.Kh2 fe6 19.Qb6 Nb6 20.Rc7 Rf7 21.Rc5 Rf3 22.Kg2 Rf8 23.Bc3 Na4 24.Rc7 Nc3 25.Rc3 Rb8 26.Rc7= Kf8 27.Kf3 a5 28.Ke4 b5=+ 29.Ke5 b4 30.ab4–/+ ab4 31.Ke6 b3 32.Rc1 b2 33.Rb1 h5 34.d5 h4 35.d6 h3 36.e4 h2 37.e5 g6 38.Kf6= Kg8?? 39.e6 (39...h1Q 40.Rh1+/–; 39.Kg6?! Rb7=) 1–0. Gross,Wilhelm – Merten,Rainer, xxii/06, 1991.

9.d4 Be7 10.Nbd2 0–0 11.0–0 Qb6 12.Qb3 Rfc8 13.Rac1 Ne4 14.Rfe1 Qd8 (better is 14...Qb3!? 15.Nb3 Nb6=) 15.Ne4+/– (15.Qb7? Rcb8 16.Qc6 Nd2–+) 15...Be4 16.Be6! Bg6 (16...fe6 17.Qe6) 17.Bg4 (17.Ne5 Ne5 18.Bc8 Rc8 19.de5 Rc7+–) 17...h5? (17...Rc1 18.Rc1 Nf6 19.Bh3+/–) 18.Bh3 (18.Bd7 Rc1 19.Bc1 Qd7+–) 18...b6 19.Rc8 (19.e4 Rc1 20.Bc1 Rc8+–) 19...Rc8 20.Ne5 (better is 20.Qb5!? Rc7 21.e4+–) 20...Bc2?? (20...Ne5 21.Bc8 Nd3=) 21.Qf7+– (21...Kh7 22.Qh5 Kg8 23.Be6 Kf8 24.Qh8#) 1–0. Gross,Wilhelm – Merten,Rainer, xx/08, 1990.

6.a3 Be7

7.Nf3 0–0 8.0–0 Nbd7 9.d4 Nb6 10.Be2 Ne4 11.Nfd2 Nd6 12.Nc3 Bg6 13.Qb3 Bf6 14.Rfd1 a5 15.Rdc1 a4 16.Qd1 Qd7 17.Qf1 c6 18.Bf3 Nd5 19.Nce4 Be7 20.Nd6 Bd6= 21.Ne4 Bc7 22.Rc2 b5 23.Qc1 Rac8 24.g3 Bb8 25.Rd2 Nb6 26.Nc5+= Qe7 27.Be2 h5 28.h4 Rfd8 29.Qf1 e5 30.Rad1 Nd5 31.Nd3 e4 32.Nc5 Bg3 33.fg3 Ne3 34.Qf4 Nd1 35.Rd1 Rd5 36.Qe3 Qd6 37.Rf1 f6 38.Qf4 Qe7 39.Qe3 Re8 40.Bd1 Bf7 41.Rf4 Bg6 42.Bc2 Kh8 43.Kh2 Bh7 44.Bd1 g5 45.Rf1 Qd6 46.Bh5 Rg8 47.Bf7+– gh4 48.Bg8 hg3 49.Kg2 Kg8 50.Ne4 Be4 51.Qe4 Kg7 52.Qg4 Rg5 53.Qf3 Rd5 54.Qg3?? Rg5–+ 55.Qg5 fg5 56.Rf2 Qd5 57.Rf3 g4 (58.Kf2 Qf3 59.Ke1 Qb3–+) 0–1. Esser,Ove – Nilsson, Grasted, 1991.

7.Nf3 Bd3 8.Qb3 Bc4 9.Qc4 0–0 10.Nc3 c6 11.d4 Qc7 (11...b5 12.Qb3=) 12.0–0 Bd6 (12...Rd8 13.e4=) 13.e4+= e5 (13...Nfd7 14.Rfc1 Bf4 15.Rc2+=) 14.de5 (14.Rfd1 Nbd7+=) 14...Be5 15.Ne5 Qe5 16.f4 Qh5 17.h3 (17.Rae1 Nbd7+=) 17...Rd8 (17...Nbd7 18.Rad1=) 18.Rad1 (18.e5 Ne8+=) 18...Na6 (18...Nbd7 19.e5 Nb6 20.Rd8 Rd8 21.Qc5+=) 19.e5 Rd1 20.Rd1 Nd5 21.b5?? (21.Rd5 cd5 22.Nd5 Qd1 23.Kh2 Rd8+=) 21...Nb6?? (21...Nc3 22.Rd7 A) 22...Nb5?! 23.g4 Nd6 24.ed6 (24.gh5?? Nc4 25.Rb7 Nc5–+) 24...Qc5 25.Qd4+=; B) 22...Ne2 23.Kh2 cb5–/+) 22.Qb3 (22.Qd3 Nc7+=) 22...cb5 (22...Nc7 23.Rd6=) 23.Qb5+= Nc7 24.Ne4?? (better is 24.Qe2 Qe2 25.Ne2+=) 24…Nb5–+ (24...Nb5 25.Re1 Rc8–+) 0–1. De Visser,Arno – Williams,E, 1999.

7.Nf3 Nbd7 8.0–0 =.

7.Nf3 Nbd7 8.Nc3 c6 9.0–0 0–0 10.Nd4 Bg6 11.Be6 fe6 12.Ne6 Qb6 13.Nf8 Rf8 14.d4 Bd6 15.h3 Bb8 16.Ne2 Qc7 17.Nf4 Bf7 18.g3 Re8 19.Qc2 g5 20.Ne2 h5 (20...Bg6!? 21.Qb3 Nd5+=) 21.Qf5+= Ne4 22.f3 Ng3 23.Qg5 Kh7 24.Ng3 Qg3 25.Qg3 Bg3 26.e4 Be6 27.Kg2 Rg8 28.Rg1 (28.Rad1 Nb6+=) 28...Nb6 29.Rh1? (29.Rad1 Bb3 30.Rb1 Nc4=) 29...h4 (29...Nc4 30.Bc1 Be5 31.Kf1 Bd4 32.Ra2–+) 30.Kf1 (better is 30.Rad1!?–/+) 30...Bc4–+ 31.Kg2 Be2 32.Bc1 Be1 33.Kh2 Bc3 (better is 33...Bf3!? 34.Re1 Rg2 35.Kh1 Ra2 36.Kg1 Ra1–+) 34.Ra2+= Bf3 35.Rf1 Be4 36.Rf4 Bd5 (36...Bg6!? 37.Rh4 Kg7+=) 37.Rh4= Kg6 38.Rg4 (38.Rf2!?=) 38...Kf5?? (better is 38...Kf6 39.Rf2 Ke7 40.Rg8 Bg8–/+) 39.Rf2+– (39.Rf2 Ke6 40.Rg8 Bd4 41.Re8 Kd7 42.Rfe2+–) 1–0. purplegadge (1725) – justnow (1740), gameknot.com, 2014.

6.Qb3 Be7

7.Nf3 0–0 8.0–0 Nc6 9.a3 a6 (9...Qd6 10.Nc3=) 10.d4 b5 (10...Qd6 11.Nc3=) 11.Be2 Nd5 12.Nbd2 Nf6 (12...Qd6 13.Rac1=) 13.Rac1+= Na7 14.Ne5 Ne4 15.Rfd1 Rb8 (15...Bd6 16.d5 Qe7 17.Ne4 Be4 18.de6 fe6 19.Bd3 Bd3 20.Rd3+=) 16.Bf3 Nd2 17.Rd2 Bd6 18.Qd1 (18.d5+/–) 18...f6 (18...Qh4 19.g3 Qe7 20.e4+/–) 19.Nc6 (better is 19.e4!? fe5 20.de5 (20.ef5 e4 21.Be4 Qh4=+) 20...Be4 21.Be4+– (21.ed6?! Bf3 22.dc7 Bd1 23.cd8Q Rfd8 24.Rcd1 Nc6+=)) 19...Nc6+= 20.Rc6 Rb6 21.Rc5 (21.Rc3 Qd7+=) 21...Qe7 (21...a5 22.ba5 Bc5 23.dc5+– (23.ab6?! Bb6 24.a4 Ba5+=)) 22.Rc1 Bg6 (22...Rd8 23.Bc6+=) 23.g3 Rd8 24.e4 e5 25.Bg2 Rf8 26.Qb3 Kh8 27.Qe3 Re8 28.f3 Qd7 29.de5 fe5 30.Bf1 Rc6 31.Rcd1 Bf7 32.f4 ef4= 33.gf4 Bg6 34.e5 Qg4 35.Qg3+– Qg3 36.hg3 Be7 37.Bh3 Bh5 38.Bd7+– Bd1 39.Bc6 Rd8 40.Rd8 Bd8 41.Bb7 Kg8 42.Ba6 c6 43.Bd4 Be7 44.Kf2 Bg4 45.Ke3 Bd7 46.Bb7 Kf7 47.Ke4 g6 48.g4 Bg4 49.Bc6 Be2 50.Bd5 Kf8 51.f5 gf5 52.Kf5 h5 53.Kf4 h4 54.Bg2 Kf7 55.Bh3 Kg6 56.e6 Bg5 57.Ke4 Kh5? 58.Be3 Be7 59.Bc5 Bg4 60.Bg4 Kg4 61.Be7 Kh5 62.Bh4! 1–0. Danek,Vaclav – Kunes,K, Klatovy op–B, 1996.

7.Nf3 0–0 8.d4 c6 9.Nc3 h6 (9...b5 10.Be2+=) 10.0–0= Nbd7 11.h3 Rc8 12.Rfe1 Re8 (12...Ne4 13.Ne4 Be4 14.Nd2=) 13.e4+= Bg6 14.Nh4 (14.Rad1 Nb6+=) 14...Bh7 (better is 14...Ne4!? 15.Ne4 Be4 (worse is 15...Bh4 16.Nd6+=) 16.Re4 Bh4–/+) 15.Nf3= Qc7 (15...Bg6 16.Rad1+=) 16.Rac1 Bf8 17.b5 Qb8 18.a4 Red8 19.e5 Nd5 20.Ne4 (20.Nd5!? cd5 21.Be2+=) 20...N7b6= 21.Bd3 cb5 22.ab5 (worse is 22.Qb5 Bb4 23.Nc3 Rc4 24.Bc4 a6 25.Nd5 ab5 26.Nb4 bc4–/+) 22...Rc1 23.Rc1 (23.Bc1 Nb4=) 23...Nf4+= 24.Nc5? (better is 24.Ra1+=) 24...Bd3–+ 25.Nd3 Ne2 26.Kh2 Nc1 27.Bc1 Qc7 28.Be3 Qc4 29.Qb1 Nd5 30.Nf4 Nf4 31.Bf4 Rd5 32.b6 a6 33.Be3 Qb5 34.Qe4 Be7 35.Qg4 Kf8 36.Qh5 Qd3 37.Bh6 gh6 38.Qh6 Ke8 39.Qh8 Bf8 40.Qh5 Qg6 41.Qh4 Bh6 42.g4 Bf4 43.Kg2 Qh6 (43...Qh6 44.Qh6 Bh6–+) 0–1. Paulini,Wolfgang (1740) – Ruetzel,Wolfgang (2005), Bayernliga, 2006.

7.Nf3 0–0 8.Nd4 Bg6 =.

7.Nf3 Nc6 8.b5 Na5 9.Qc3 Nc4 10.Qc4 –/+.

7.Nf3 Nc6 8.Bb5 Be4 9.Nc3 Bf3 10.gf3 =.

7.Nf3 Nbd7 8.0–0 Bg4 9.Nd4 0–0 10.f3 Bh5 11.Ne2 (11.d3 e5 12.Nf5 Bg6+=) 11...Nb6 12.Bd3 (12.Bf6 Bf6 (< 12...gf6 13.Nf4 Nc4 14.Qc4+=) 13.d4 Nc4 14.Qc4 Bg5=+) 12...Qd6 13.a3 Rfd8 14.Nf4 (14.Bc2 a5=+) 14...Bg6 (14...e5!? 15.Nh5 Qd3 16.Qd3 Rd3 17.Nf6 Bf6=+) 15.Bg6= hg6 16.Rc1 (16.d3 g5 17.Nh3 Qd3 18.Qd3 Rd3–/+) 16...Nbd5 17.Ne2 (17.Nd5 Nd5 (< 17...Qd5 18.Qd5 Nd5 19.e4+/–) 18.Nc3 Nc3 19.Qc3 Bf6+=) 17...Rac8 (17...a5 18.e4 Nf4 19.Nf4 Qf4 20.ba5=) 18.g3 (18.e4 Nf4 19.Nf4 Qf4=) 18...c5 (18...c6 19.Bf6 Bf6 20.d4=+) 19.e4 (19.bc5 Rc5 20.Rc5 Qc5=) 19...Nb6=+ 20.e5 (20.d4 cb4 21.ab4 Ra8=) 20...Qd5 21.Qd5 Nfd5 (21...Rd5? 22.ef6 gf6 23.Nf4+–) 22.bc5 Rc5 (22...Bc5 23.d4 Be7 24.Nd2=+) 23.Nbc3 Nc3 24.Bc3 Rdc8 (24...Rd3 25.Kf2=+) 25.f4 (25.d4 R5c6=) 25...g5 26.Rcb1 (26.Bd4 Rc1 27.Nc1 Ba3+=) 26...gf4=+ 27.gf4 Rc4 28.Kg2 g5 (28...Bc5!?=+) 29.Kf3 gf4 30.Nf4 ½–½. Gross,Wilhelm – Merten,Rainer, xix/14, 1990.

6.b5 c5

7.Nf3= Nbd7

8.0–0 Rc8 9.h3 h6 10.Be2 Be7 11.d4 0–0 12.Nbd2 Ne4 13.Ne4 Be4 14.Nd2 Bg6 15.Rc1 Bf6 16.Nf3 Rc7 17.Qa4 Qb8 18.Qb3 Rfc8 19.Rfd1 (19.Ne5 Ne5 20.de5 Be7=) 19...Be4 (19...cd4 20.Nd4 e5 21.Nf3=) 20.Nd2 Bg6 21.Nf3 (21.Bd3 Bd3 22.Qd3 cd4 23.Rc7 Rc7 24.Bd4 Bd4 25.Qd4 Nb6=) 21...cd4+= 22.Rc7 (22.Nd4!? e5 23.Nf3+=) 22...Rc7–/+ 23.Bd4 Bc2–+ (23...Bc2 24.Qb4 Bd1 25.Bd1 Rc1–+) 0–1. Gross,Wilhelm – Merten,Rainer, xxiv/23, 1993.

8.0–0 Bd6 9.d4 Rc8 10.dc5 Nc5 11.Nd4 Bg6 =.

8.0–0 Bd6 9.d4 Rc8 10.Nbd2 0–0 11.Rc1 Qe7 12.Re1 Ne4 (12...Nb6 13.e4 Nc4 14.Rc4+–) 13.Ne4 Be4 14.Bd3 (14.Nd2 Bd5=) 14...Bd3 15.Qd3 Rfd8 16.Qb3 cd4 17.ed4 (17.Rc8 Rc8 18.Bd4 Nc5=) 17...Nf6 (17...Nb6 18.Ne5=+) 18.Rc8 Rc8 19.Rc1 (19.Qa4 Qe8=+) 19...Rc1 20.Bc1 Qc7 21.Bd2 Ne4 22.g3 (22.Qe3 Nd2 23.Qd2 Qc4=+) 22...h6 (22...Nd2 23.Nd2 Qc1 24.Nf1=+) 23.Kf1 (23.Qe3 Qc2=+) 23...Qb6 (23...Nd2 24.Nd2 Qc1 25.Ke2–/+) 24.Be3 Qc7 25.Nd2 Qc1–/+ 26.Ke2 Nc3 27.Kd3 Nd5 28.Ne4 Qf1–+ 29.Kc2 Bb4 30.a3 Be7 31.Nc3 Ne3 32.fe3 Qf2 33.Kd3 Qh2 34.Qa4–/+ Qg3 35.Qa7 Qc7 36.b6 Qc8 37.a4 e5 38.de5=+ Bb4 39.Nd5= Qf5 40.e4+/– Qf3 41.Kd4 Ba3 42.Qb7 Qf2 43.Kc4 Qe2 44.Kc3 Qf3 45.Kd2 Qf2 46.Kd3 Qf1 47.Kc2 Qc1 48.Kb3 Qb2 49.Kc4 Qe2 50.Kd4 Qf2 51.Kd3 Qf1 52.Kc2 Qc1 53.Kb3 Qb2 54.Kc4 Qe2 55.Kc3 ½–½. Fritz,Harry – Merten,Rainer, corr 3GMM–55, 1995.

8.0–0 Bd6 9.d4 Rc8 10.Nbd2 h6 11.Rc1 Bb8 (11...Nb6 12.dc5 Rc5 13.Bd4+=) 12.Nb3 (12.Qe2 0–0+=) 12...b6 (12...0–0 13.dc5 Qc7 14.Bd4+/–) 13.dc5 bc5 (13...Nc5 14.Nbd4 Be4 15.Nd2+=) 14.a4 (14.Qe2 Bd6+/–) 14...Qc7 15.Nbd2 (15.Qe2 0–0+=) 15...0–0 16.Qe2 Rfd8 17.e4 Bg6 18.Rfd1 Nh5 (18...Qf4 19.Bd3=) 19.Qe1 (19.Bc3 Nf4 20.Qe3 Nb6+=) 19...Nb6 (19...Nhf6 20.Bd3+=) 20.Be5+= Qb7 21.Bb8 Qb8 22.a5 Nc4 23.Nc4 Nf6 24.e5+= Ne4 25.Nh4 Rd1 26.Rd1 Bh7 27.f3 Ng5 28.Nd6+= Rd8 29.Rd2 (29.Qc3 Qc7+/–) ½–½. Dziel – Gross, corr 3GMM–08, 1995.

8.0–0 Be7 9.d4 0–0 10.Nbd2 Rc8 11.Rc1 h6 12.h3 Ne4 13.Ne4 Be4 14.Nd2 Bg6 15.Nf3 Bf6 16.Bd3 Bd3 17.Qd3 Qa5 18.Bc3 Qb6 (18...Qa2 19.Ra1 Qd5 20.e4+=) 19.Qb1 cd4 20.Bd4 Bd4 21.Nd4 ½–½. Gross,Wilhelm – Merten,Rainer, xxiv/25, 1993.

8.0–0 Be7 9.d4 Rc8 10.Nbd2 Nb6 11.Be2 h6 12.Rc1 0–0 13.a4 Ne4 14.Ne4 Be4 15.Nd2 Bh7 16.a5 Nd5 17.Nb3 cd4 18.Bd4 Rc1 19.Qc1 Qb8 20.Qd2 (20.Qb2 Bf6+=) 20...Rc8 21.Bd3 Bd3 22.Qd3 Bf6 ½–½. Gross,Wilhelm – Merten,Rainer, xxv/14, 1994.

6.b5 Nbd7

7.Nf3 Bd6 (--> 4.Nf3 Nbd7 5.c4 dc4 6.Bc4 e6 7.b5 Bd6).

7.Nf3 Be7 8.0–0= 0–0 9.d4 (9.Nd4 Nb6 10.Be2 Bg6=) 9...Rc8 (9...Nb6 10.Be2=) 10.Nbd2 (10.Nc3 Nb6 11.Bd3 Bd3 12.Qd3 c6=) 10...c5 (10...c6 11.bc6 Rc6 12.Rc1=+) 11.Rc1= b6 (11...Nb6 12.Be2=) 12.Nh4 (12.Qe2 Bg4+=) 12...Bg4= 13.f3 Bh5 14.g4 Bg6 (14...Ne8 15.gh5 Bh4 16.Ne4=) 15.Ng6+= hg6 16.Qe2 cd4 (16...Nd5 17.Rfd1+=) 17.Bd4 Bc5 18.Nb3 Ba3 19.Rc2 Nc5 20.Rd1 Qe7 21.Be5 Rfd8 (21...Nb3 22.Bb3 Bc5 23.Rcd2+=) 22.Nd4+/– Qb7 23.Nc6 (23.g5 Nh7+/–) 23...Rd1+= 24.Qd1 Ncd7 (24...a6 25.Qd6 ab5 26.Bb5+=) 25.Bd6+/– Bd6 26.Qd6 Kh7 27.Qe7 Rf8? 28.Ne5!+– Kg8 29.g5 Qc7 30.gf6 Qe5 31.Qd7 Qe3 32.Kg2 Qg5 33.Kh1 Qf6 34.Rf2?? Rd8 35.Qb7 Rd1 36.Bf1 Qh4 37.Qc8 Kh7 38.Qc2 0–1. Gross,Wilhelm – Merten,Rainer, xxiv/13, 1993.

7.Nf3 Nb6

8.Be2 Bc5 9.0–0 0–0 10.Nh4 Bd3 11.Bd3 Qd3 12.Bf6 gf6 13.a4 Rad8 14.Nc3 Qd2 15.Qd2 Rd2 16.Ne4 Rc2 17.Rfc1 Rc1 18.Rc1 Be7 19.Rc7 Re8 20.Rb7 Na4? (better is 20...f5 21.Nd2 Bh4 22.Ra7 Rd8=) 21.Ra7+– f5 22.Ra4 (22.Nd2!? Nc3 23.b6+–) 22...fe4+/– 23.Re4 Bh4? (better is 23...Rb8+/–) 24.Rh4 Rc8 25.f3 Rc1 26.Kf2 Rb1 27.Rh5 Rb3 28.Rc5 Kf8 29.g4 f6 30.e4 Kf7 31.e5 fe5 32.Re5 Kf6 33.Rc5 h6 34.h4 e5 35.Rc6 Kf7 36.Rh6 Rb5 37.g5 Rb4 38.Kg3 e4 (38...Rf4 39.Rc6 Kg8 40.h5+–) 39.fe4 Re4 40.Rf6 Kg7 41.Rh6 (41.h5 Re1+–) 41...Rb4?? (41...Kf7 42.h5+–) 42.Rf6 (42.Re6 Rb5+–) 42...Rb3?? (42...Re4 43.h5 Re7+–) 43.Kf4 (better is 43.Kg4+–) 43...Rb4 44.Kg3?? (better is 44.Kf5 Rh4 45.Rg6 Kf8 46.Rb6+–) 44...Rb3 45.Rf3 Rb4 46.Rf4 Rb3 47.Kg4 Rb1 48.h5 Rg1 49.Kf5 Rh1 (49...Ra1 50.Re4 Rf1 51.Ke6+–) 50.h6 Kh7 51.Kf6 (better is 51.g6 Kg8 52.Kf6 Rg1+–) 51...Rc1 (51...Rg1 52.Rf2+–) 52.Re4 (better is 52.g6 Kh8 53.Ke7 Re1 54.Kf8 Rg1 55.g7 Kh7+–) 52...Rf1 53.Ke6 Kg6 54.Rh4 Kh7 (54...Re1 55.Kd5 Rd1 56.Kc4+–) 55.Ke5 (55.g6 Kh8+–) 55...Rf2 (55...Re1 56.Re4 Rg1 57.Kf5 Rf1 58.Kg4 Rg1 59.Kh5 Rh1 60.Rh4+–) 56.Rf4 (better is 56.g6!? Kh8+–) 56...Rg2 57.Kf5 Rc2 58.Re4 Rc5 (58...Rf2 59.Ke6+–) 59.Re5 (59.Kf6!? Rc6 60.Re6 Rc8+–) 59...Rc7 60.Kf6 Rc6 61.Re6 Rc8 62.Re7 Kh8 63.g6 Rc6 (63...Rb8+–) 64.Kf7 Rc8 65.g7 Kh7 66.Re8 Rc7 67.Kf8 Kh6 (67...Rg7 68.hg7 Kg6 69.g8Q Kf5 70.Qg3 Kf6 71.Qe5 Kg6 72.Re6 Kh7 73.Qg7) 68.g8Q Rh7 (68...Rd7 69.Re6 Kh5 70.Qg6 Kh4 71.Re4 Kh3 72.Qg4 Kh2 73.Re2 Kh1 74.Qg2) 69.Re6 (69…Kh5 70.Re2 Rg7 71.Qg7 Kh4 72.Rh2; 69.Re3 Rf7 70.Kf7 Kh5 71.Rh3) 1–0. Bonetti,Shane – Adams,Nick nicktony, ICC, 2002.

8.Be2 Bd6 9.0–0 0–0 10.d3 (10.Nd4 Be4=+) 10...Bg4 (10...a6 11.e4 Bg4 12.e5 ab5 13.ef6 gf6 14.Qb3+–) 11.h3= Bh5 12.Nc3 (12.Bd4 c5 13.bc6 bc6=) 12...Nfd5 (12...a6 13.a4=) 13.Ne4+= Be7 14.Ng3 (14.Ne5 Be2 15.Qe2 a6=) 14...Bg6= 15.Ne5 Bd6 (15...a6 16.Ng6 fg6 17.ba6 Ra6 18.Ne4=) 16.Ng6+= hg6 (16...fg6 17.Bg4 Qd7 18.Ne4=) 17.Ne4 Rc8 (17...a6 18.Nd6 Qd6 19.ba6 Ra6 20.Qb3+=) 18.a4 Nd7 (18...a5 19.ba6 ba6 20.a5+/–) 19.Rc1 N7f6 20.Qb3 Qe7 (20...c6 21.Nd6 Qd6 22.bc6 bc6 23.d4+/–) 21.Bf3 Rb8 22.Nd6 cd6 23.e4 Nb6 24.e5 Ne8 25.Ba3 Qd7 26.d4 Nc8 27.d5 Ne7 28.de6 fe6 29.ed6 Nd6 30.Rcd1 Nec8 31.Bg4 Re8 32.Rfe1 (32...Qf7 33.Bd6 Nd6 34.Rd6+–) 1–0. Luzuriaga,Norberto Horacio – Wallace,Gary, corr or01–001 E–mail, 2001.

8.Be2 Bd6 9.0–0 0–0 10.d3 Bg6 (10...a6 11.e4 Bg4 12.e5 ab5 13.ef6 gf6 14.Qb3+–) 11.e4 (11.Bd4 c5 12.bc6 bc6=) 11...Be7 (11...a6 12.e5 ab5 13.ef6 gf6 14.Re1+–) 12.Nbd2 (12.Qc2 Bd6=) 12...a6 13.a4 ab5 14.ab5 Qd7 15.Qb3 Rfd8 (15...Bc5 16.Ne5 Qd6 17.Ng6 Ra1 18.Ba1 fg6 19.e5+–) 16.Ne5+= Qe8 17.Ndf3 (17.Rfc1!?+/–) 17...Bh5= 18.h3 Nfd7 19.g4 Ne5 (19...Nc5 20.Qc2 f6 21.d4+=) 20.Ne5 (20.Be5 Bg6 21.Bc7 Ra1 22.Ra1 Ra8 23.Ra8 Na8+/–) 20...Bg6 21.f4 (21.Qc3 Bf8 22.Qc7 Qb5 23.Ra8 Ra8+=) 21...Ra1 22.Ba1 Bc5 23.Kg2 f6 (23...Bd4 24.Ng6 hg6 25.Rc1 Ba1 26.Ra1=) 24.Nf3 (24.Ng6!? hg6 25.f5+=) 24...Bf7 25.Qc2 Nd7 (25...Bd6 26.e5 Nd5 27.Qc1=+) 26.Qc3 Ra8 27.Bb2 Qe7 28.d4 Bb6 29.Bc4 Ba5 30.Qb3 Nb6 31.Ba3 Qd7 32.Be2 e5 33.d5 ef4 34.Rd1 h5 35.Nh4 Qe8–/+ 36.Bf3 hg4 37.hg4 Nd7 38.Nf5= Ne5?? 39.Rh1 Bb6?? 40.Ne7+– (40...Qe7 41.Be7+–) 1–0. Gross,Wilhelm – Merten,Rainer, xix/12, 1990.

8.Be2 Bd6 9.0–0 Bg4 10.d3 Nfd5 (10...0–0 11.Nc3=) 11.a4 (11.Bg7 Rg8 12.Bd4 Qd7+=) 11...a5 (11...0–0 12.a5 Nd7 13.Qa4=) 12.ba6 Ra6 13.a5 (worse is 13.Bg7 Rg8 14.Bb2 Bh3–/+) 13...Nd7 14.Nc3 c5 Attacks the isolani on a5 (14...0–0!?=) 15.h3 (15.Nd5 ed5 16.Bg7 Rg8=) 15...h5 (15...Bf3!? 16.Bf3 Nb4+/–) 16.Qa4 (16.hg4?! hg4 17.g3 Bg3 18.fg3 Ne3=) 16...Nb4 17.d4 (better is 17.Ne4 Bf3 18.Bf3+/– (18.gf3?! Qh4+=)) 17...Bb8?? (17...Bf3!? 18.Bf3 Nd3+=) 18.Rfd1 (18.hg4 hg4 19.Ba6 gf3 20.g3+= (20.Bb7?? Rh1 21.Kh1 Qh4 22.Kg1 Qh2)) 18...Bf3+/– 19.Bf3 Nc6 20.dc5 Ra5?? (better is 20...Qc7+/–) 21.Bc6 (21.Rd7!? Kd7 22.Rd1 Kc8 23.Rd8 Rd8+–) 21...Ra4 22.Ba4 0–0 23.Rd7 Qf6 24.Rb7 Qe5 25.g3 Qc5 26.Rb5 Qc4 27.Bb3 Qd3 28.Rd1 Qg6 29.h4 f5 30.Ne2 Kh7 31.Rd7 e5 32.Rbb7 1–0. Briscoe,C (2265) – Van der Linden,H, 32nd Taminco Open, Ghent BEL, 2009.

8.Be2 Bd3

9.0–0 Be7 10.Bd4 Be2 11.Qe2 0–0 12.a4 c5 13.bc6 bc6 14.Rc1 Rc8 15.a5 Nbd5 16.Ba7 Ra8 17.Bd4 Ra5 18.Ra5 Qa5 19.Rc6 Rb8 20.Rc1 Nb4 21.Be5 Na2 22.Bb8 Nc1 23.Qc4 Qb4 24.Qb4 Bb4 25.Ne5 Nd5 26.d4 Nb3 27.Kf1 g5 28.Nc6 Bf8 29.Ke2 h5 30.h3 Kg7 31.e4 Ne7 32.Ne7 Be7 33.Kd3 Na5 34.Bc7 Nb7 35.Kc4 White prepares the advance d5 35...Nd6 36.Bd6 Bd6 37.Nd2 f6 38.d5 Kf7 39.Kb5 Ke7 (39...f5+–) 40.Kc6 g4 41.hg4 hg4 (41...Bb4 42.Nb3 hg4 43.Nc5 ed5 44.ed5+–) 42.Nc4 Bb4 (42...ed5 43.Nd6 de4 44.Kd5+–) 43.d6 Kd8 (43...Kf8 44.Kc7+–) 44.d7 (44.d7 Bc5 45.e5+–) 1–0. forsetinn (2365) – rusdin (1940), gameknot.com, 2014.

9.Bd3 Qd3 10.Qe2 Qc2 11.d3 (11.Bf6 gf6 12.0–0 Rg8=) 11...Bb4+= 12.Kf1 Qe2 (12...Qa4!?+=) 13.Ke2= 0–0–0 14.Ne5 Rd5 15.a4 Nbd7 16.Nd7 (worse is 16.Nf7 Rf8 17.e4 Rh5–/+) 16...Rd7 17.Na3 Rhd8 18.Nc2 (18.Bf6 gf6 19.Rhd1 Rg8+=) 18...Ba5 19.Ra3 Rd5 20.Rc1 R5d7 (20...Rh5 21.h3+=) 21.Bc3 (21.Bf6 gf6 22.d4 f5+=) 21...Bc3 22.Rc3 Nd5 23.Rb3 e5 24.d4 f6 25.Kf1 Rd6 26.e4 (26.a5 ed4 27.Nd4 g6+=) 26...Nb6 27.de5 fe5 28.Ne3 Na4 29.Nd5 (29.Ra3 Nb6=) 29...Kb8 30.Rh3 h6 31.Rh5 Nb2 32.Ke2 (32.Re5? Nd3 33.Rc7 Ne5 34.Rg7 Nc4–+) 32...c6 33.bc6 bc6 34.Nb4 Rd2 35.Ke1 Rd1 36.Rd1 Rd1 37.Ke2 Rc1 38.Re5 ½–½. Welti,M – Benussi,A, corr SOK–96–118, 1997.

9.Bd3 Qd3 10.Bf6 gf6 =.

9.Ne5 Be2 10.Qe2 Na4 11.Bd4 Qd5 12.0–0 Bd6 13.Nf3 (13.f4 a6=) 13...e5 14.Nc3 Nc3 15.Bc3 e4 16.Nd4 Qg5 (16...0–0 17.f3=) 17.f3 Qh5 18.f4 (18.g3 0–0=) 18...Qe2 (18...Bc5 19.Qh5 Nh5 20.Nf5+=) 19.Ne2 0–0–0 20.Bd4 (20.Rac1 Ba3 21.Rc2 Rhe8=) 20...Bb4 (20...Rhe8 21.Rac1=) 21.Nc3 Bc3 (21...Rhe8 22.a3 Bf8 23.Ra2=) 22.dc3 Rd6 23.Rac1 (23.Bf6 Rf6 24.Rad1 Rd8=) 23...b6 (23...Rhd8 24.c4=) 24.h3 (24.Bf6 Rf6 25.Rfd1 Rd8=) 24...Rhd8 25.c4 White prepares the advance c5 25...c5 26.bc6 Rc6 27.c5 b5 28.Rb1 (28.Rfd1 Nd5=) 28...a6 29.a4 (29.Rfd1 Nd5=) 29...ba4 30.Ra1 Rd7 (30...Rd5 31.Rfc1=) 31.Ra4= g6 (31...Ne8!?=) 32.Bf6 (32.Rfa1 Ra7 33.Bf6 Rf6 34.Re4 Rc6 35.Re8 Kd7+/–) 32...Rf6 33.Re4 Rc6 34.Rc1 Rdc7 35.Ra4 Kb7 36.Ra5 f5 37.Kf2 Rd7 38.Kf3 Rd2 39.Rc4 Rd3 (39...Rb2 40.Rd4 Kc7 41.Rd5+/–) 40.Rd4 Rc3 41.Rd5 (41.Rd7 Kc8 42.Rh7 R3c5 43.Rc5 Rc5+–) 41...Kc7 (41...Re6 42.Rd7 Kb8 43.Rh7 Rce3 44.Kf2+/–) 42.g4 Rf6 (42...Re6 43.Re5 (43.gf5?! Ree3 44.Kg4 Rg3 45.Kh4 Rh3 46.Kg5 Rh5 47.Kf6 Rc4=) 43...fg4 44.hg4 Re5 45.fe5+–) 43.Re5 (43.gf5 gf5 44.Rd6 Rc5 45.Rda6 Ra5 46.Rf6 Kd8+–) 43...Kd7 44.gf5 gf5 45.Rd5 Ke7 46.Rd6! Rc5 (46...Rd6 47.cd6 Double attack (47.cd6 Passed pawn)) 47.Rda6 (worse is 47.Rc5 Kd6 48.Re5 Kd7+=) 47...Ra6 48.Ra6 Kf7 49.Rh6 (49.h4 Rc1+/–) 49...Kg7 50.Re6 Rc3 51.Re5 Kg6 52.Kg3 Kf6 (52...Rd3 53.Kh4+/–) 53.Kh4 Rc1 54.Rb5 Re1 (54...Rg1 55.Rb6 Kg7 56.Kh5+/–) 55.Rb6+– Kf7 56.Kg5 Re3 57.h4 Rh3 58.h5 Kg7 (58...Rh1 59.h6+–) 59.h6 Kf7 60.Kf5 Rh5 61.Ke4 Rh1 62.Ke5 Rh2 63.Rb7 (63.f5!? Re2 64.Kf4 Rf2 65.Ke4 Rf1+–) 63...Kg6+/– 64.f5 Kh6 65.Kf6 (65.Ke6 Ra2 66.Kf7 Kg5+=) 65...Rf2 66.Rb1 Kh5 67.Rh1 (67.Ke6 Rg2+/–) 67...Kg4 68.Rh7 (68.Rg1!? Kf4 69.Rc1+/–) 68...Rf5= ½–½. Winterfeldt,Steffen (1760) – Bildt,Maximilian (1860), Mittelfrankenliga–B2b, 2006.

9.Ne5 Be2 10.Qe2 a6 11.ba6 Ra6 12.0–0 =.

9.Ne5 Be2 10.Qe2 Bd6 11.0–0 0–0 12.a4 (12.Bd4 Be5 13.Be5 Nfd7=) 12...Nfd7 (12...a6 13.a5 Nbd7 14.Nd7 Nd7 15.Ba3=) 13.Nf3 (13.Nd7 Qd7 14.a5 Nd5=) 13...Nc5 (13...a6 14.a5 Nd5 15.d4=) 14.Nc3 (14.a5 Nd5=) 14...Nd3 15.Nd1 Nc4 (15...Nb2 16.Nb2 a6 17.e4=) 16.Bd4+= Nce5 17.Ne5 Ne5 18.f4 Ng6 19.Bc3 Qd7 20.Qg4 (20.Qf3 c6=) 20...f5 (20...a6 21.f5 ef5 22.Rf5=+) 21.Qf3 c6 22.Rb1 (22.bc6 Qc6 23.Qc6 bc6=) 22...Rfc8 23.Nf2 a6 24.bc6 Rc6 25.Nh3 Ne7 26.Qg3 Nd5=+ 27.Ba1 Rc2 28.Ng5 g6 29.Nf3 Ra2 30.h4 Ra4 31.h5 b5 32.hg6= h6 33.Qh3 Bf8 34.Ne5 Qg7 35.g4 Ne7? 36.Qg2+= Rc8 37.gf5 ef5 38.Bd4 Rc2 39.Rfc1+/– Raa2?? 40.Rc2 Rc2+/– 41.Ra1 Qf6+= 42.Nf3 Qc6?? 43.g7+– 1–0. Zahn,Richard – Sepp,Lothar, GER Police–ch 1st, 1997.

8.Be2 Be7

9.0–0 0–0 10.Qb3 Qd5 11.Qd5 Nbd5 12.Nc3 Nc3 13.Bc3 Nd5 14.Bb2 Rac8 15.Bd4 Nb4 16.a4 c5 17.bc6 Nc6 (worse is 17...Rc6 18.Ba7 Rc2 19.Bd4+=) 18.Rfc1 Nd4 19.Nd4 Be4 20.f3 (20.Bf3 Bf3 21.Nf3 a6=) 20...Bg6 21.Nb3 Bf6 22.d4 e5 23.d5 e4 24.Rc8 Rc8 25.Rc1 Rc1 26.Nc1 Kf8 27.Nb3 b6 28.Bb5 Ke7 29.Nd2 Bc3 (29...ef3 30.gf3 (30.Nf3? Kd6–+) 30...Bc2 31.Nc4=) 30.Nc4 (30.Ne4 Be4 31.fe4 Be5+=) 30...f5 31.d6 Kd8 32.f4 Bb4 33.d7 Bf7 34.Ne5 Bd5 35.Bc6 (35.Nc6!? Bc6 36.Bc6=) 35...Be6+= 36.Bb5 ½–½. Rozsa,Zoltan (1980) – Somogyi,Gabor (1970), HUN–chT2 Erkel, 2007.

9.0–0 0–0 10.Nc3 Bd3 11.Ne1 (11.Ne5 Be2 12.Qe2 a6=) 11...Be2+= 12.Qe2 Qd7 13.f4 (13.Nf3 a6=) 13...Rfd8+= Attacks the backward pawn on d2 14.d4 c6 15.Nf3 cb5 16.Ne5 Qe8 17.Nb5 Rdc8 (17...Nbd5 18.Rfc1=) 18.Rac1 a6?? (better is 18...Nbd5=) 19.Nc7+– Qa4 (19...Rc7 20.Rc7 Nfd5+–) 20.Na8 Ra8 21.Rc7 Bd8 22.Rb7 Qa2 23.Rf7 Nc4 24.Rb7 Nb2 25.Rb2 Qd5 26.Rfb1 Ne4 27.Rb7 Nc3 28.Qh5 (28.Qh5 Bf6 29.Rb8 Qd8 30.Qf7 Kh8 31.Qc7 Rb8 32.Rb8+–) 1–0. Gross,Wilhelm – Merten,Rainer, corr, 1991.

9.0–0 Bd3 10.Nc3 (10.Bd4!? Be2 11.Qe2=) 10...Nc4=+ 11.Bc1 0–0 12.Ne1 Be2 13.Qe2 Nd6 14.e4 e5 (14...Nd7 15.d4=) 15.Nf3 Nd7 16.Nd5 (16.d4 ed4 17.Nd4 a6=) 16...a6 (16...c6 17.bc6 bc6 18.Ne7 Qe7 19.d3=) 17.Bb2 ab5 18.Ne5 Re8 19.Qg4 Bf6 20.Nd7 (20.Qd7 Be5 21.Qd8 Rad8 22.Nc7 Bb2 23.Rab1–/+) 20...Bb2–/+ 21.d3?? (21.Rae1 f5 22.ef5 Qd7 23.d4–+) 21...f5–+ (21...Ba1?! 22.Ra1 f5 23.ef5 Ra2 24.Rb1–+) 22.Qe2 (22.ef5 Qd7 (22...Ba1 23.f6 g6 24.Ne7 Re7 25.fe7 Qe7 26.Ra1–+) 23.Rac1 Ra2 24.Rc7 Qf5 25.Qf5 Nf5–+) 22...Ba1 (22...Qd7?! 23.Qb2 fe4 24.Rac1=+) 23.Ra1 Qd7 24.f3 (24.Qc2 Rac8 25.f3–+) 24…Ne4 (25.de4 Qd5–+) 0–1. Wartig,Wolfgang – Merten,Rainer, corr SOK–92–80, 1992.

9.Nc3 0–0 10.0–0 Rc8 (10...Bd6 11.Nd4 Bg6 12.d3=) 11.d4 (11.d3 c6=) 11...c6 12.bc6 Rc6 13.Ne5 Rc8 14.Bd3 (14.Bf3 Nbd5 15.Nd5 Nd5+–) 14...Bd3=+ 15.Qd3 Bd6 16.f4 (16.Rfd1 Nbd5=+) 16...Nfd5 17.Nd5 Nd5 18.Rac1 Qh4 19.g3 (19.Ba3 Ba3 20.Qa3 Rc1 21.Rc1 Rd8=) 19...Qe7 (19...Qf6 20.Nd7 Qe7 21.Nf8 Qf8 22.e4+–) 20.e4= Nb6 21.Qb3 Rfd8 22.Nd3 Rc1 23.Rc1 Rc8 24.Rc8 Nc8 25.e5 Bb8 26.Ba3 Qc7 27.Qb4 h6 28.Nc5 (28.g4 Qd8=) 28...Nb6 29.Qb5 ½–½. Leisebein,Peter – Merten,Rainer, corr SOK–92–89, 1992.

9.Nc3 Bd3 10.Ne5 Bg6 (10...Be2 11.Qe2 (worse is 11.Ne2 Qd5–/+) 11...a6 12.0–0=) 11.0–0 Nfd7 12.Ng6 hg6 13.Ne4 Nf6 14.Bf3 Nbd5 15.Nf6 Bf6 16.Bf6 Qf6 17.Bd5 ed5 18.d4 0–0–0 19.Rc1 Rh4 20.Qa4 Kb8 21.f4 Rdh8 22.h3 Qe6 23.Qc2 (better is 23.Rc3!?=) 23...Qe3+= 24.Rf2 Qe7 (24...Rc8 25.Qc3 Qe6 26.Qg3+=) 25.Qc5= Qc5 26.Rc5 Rd8 27.Kh2 Rhh8 28.f5 b6 29.Rc6 gf5 30.Rf5 f6 31.Rf3 (31.Re6 Rh4 32.Re7 Rd4 33.Rg7 Rb4–/+) 31...Rhe8–/+ 32.Rg3 Rd7 33.Rcc3 Re4 34.Rcd3 Rde7 35.Rd2 Kb7 36.a4 a6 37.Rc3 ab5 38.ab5 Re1 39.Rb3 Rc1 40.Rdd3 Rc4 41.Re3 Re3 42.Re3 Rd4 43.Re7 g5 44.Rf7 Rf4 45.g3 Rf1 (45...Rb4 46.Rf6 Rb5 47.Rf5 Rb2 48.Kg1–+) 46.Kg2 Rf5 47.Rf8 (47.g4 Rf4–+) 47...c5 (47...d4!? 48.Rd8–+) 48.Rf7 Kc8 49.Rf8 Kd7 50.Rf7 Kd6 51.Rb7 c4 52.Rb6 Kc7 53.Rc6 Kb7 54.g4 (54.h4!?–/+) 54...Rf4 55.Kg3 Rf1 56.Rc5 Kb6 (56...Kb6 57.Rc8 Kb5–+) 0–1. purplegadge (1740) – aidenmcdonnell (1770), gameknot.com, 2014.

4.c4 c6

5.a4 e5 6.b5 (6.c5 e4=+) 6...Bd6 7.Nf3 Qe7 (7...e4 8.Nd4 Bg6 9.cd5 Nd5 10.bc6 bc6 11.Nc3=) 8.Be2 0–0 9.d4 Bb4 (9...e4 10.Nh4 Be6 11.c5=+) 10.Nc3 Ne4 (10...cb5 11.ab5 dc4 12.Ne5=) 11.Qc1 (11.Qb3 cb5 12.ab5 dc4 13.Bc4 Nc3 14.Bc3 Bc3 15.Qc3 e4=) 11...ed4 (11...cb5 12.ab5 Rc8 13.0–0 Bc3 14.Bc3=) 12.Nd4 Bg6 13.0–0 (13.cd5? c5 14.0–0 cd4 15.Ne4 Be4–+ (15...Qe4?! 16.Bd4 Bd6 17.Bf3–/+)) 13...Nc3 (13...Bc3 14.Bc3 c5 15.Nf3 Nc3 16.Qc3=) 14.Bc3 ½–½. Waechtler,Frank (2290) – Prange,Stefan, NRW–Liga I, 1994.

5.Nc3 d4 6.ed4= Qd4 7.Nf3 Qd8 8.Be2 e6 9.a3 Bd6 10.d4 Nbd7 11.0–0 0–0 (11...a5 12.b5=) 12.Bd3 (12.Nh4 Qc7+=) 12...Bg4 13.h3 Bh5 14.Be4 (14.Re1 Re8=) 14...Rc8 (14...a5 15.Qb3=) 15.Qd3 (15.g4 Bg6 (15...Ne4? 16.Ne4 Bg4 17.hg4+–) 16.Bg6 hg6+=) 15...Bb8 16.Ng5 (better is 16.Rfe1!?=) 16...Ne4–/+ 17.Nge4 (17.Nce4 f5 18.Ne6 fe4 19.Qe3–/+) 17...Bg6?? (better is 17...Ne5 18.Qc2 Nc4–+) 18.Qe2= Qc7 19.Ng3 Qf4 20.Qf3 0–1. Gross,Wilhelm – Merten,Rainer, xiv/17, 1987.

5.Nc3 Nbd7 6.Nf3 e6 7.b5 Nc5 (7...Bd6 8.bc6 bc6 9.Nd4=) 8.d4 Nce4 9.Qa4 Nc3 10.Bc3 Ne4 (10...Qc8 11.c5 Ne4 12.bc6+/–) 11.Bd2 (11.Rc1 c5+=) 11...Nd2= 12.Nd2 Qd7 13.Be2 (13.c5!?+=) 13...cb5+= 14.cb5 Bd6 15.0–0 0–0 16.Rfc1 e5 (16...a6 17.Nb3+=) 17.Nf3 (17.Nb3 Qe7=) 17...e4 18.Nd2 Qe7 19.Qd1 Qg5 20.Bf1 Bg4 21.Be2 (21.Qa4 Bd7+=) 21...Be6 (21...Bh2!? 22.Kh2 Qh5 23.Kg1 Be2–/+) 22.Nf1 f5 23.f4 ef3 24.Bf3 (24.Bf3 f4 Combination) 24...Rfe8 25.Qb3 Exerts pressure on the isolated pawn 25...f4 26.Re1 Kh8 27.ef4 Qf4 28.Rad1 h6 29.a4 Bg8 30.Re8 Re8 31.a5 Rc8 32.Qe3 Qe3 33.Ne3 Rc3 34.Re1 Bb4 35.Nd5 Rf3 36.Nb4 Rb3 37.Nc2 Rb5 38.Ra1 g6 39.Ne3+= Rb3 40.Kf2 Kg7 41.Kf3 g5= 42.Rc1 Bd5 43.Kf2 Be4 44.Rc7 Kf6 45.a6 Rb2 46.Kg3 h5 47.h4 ba6 48.Ra7 Bb7+= 49.hg5 Kg5 50.d5 Rb3 51.Kf2 Kf4–/+ 52.g3 Ke4 53.Nc4 Kd5 54.Na5 Rb2 55.Ke3 Bc8 56.Ra8 Rb5 57.Rc8–/+ Ra5 58.Rh8 Kc4 59.Rh6 ½–½. Zabotin,Alexander – Vitiugov,Nikita (2160), RUS–ch U14 Togliatti, 2000.

5.c5 e6 =.

5.Nf3 (--> 4.Nf3 c6 5.c4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Bf6 ef6 6.Qb3 a5 7.c5 (7.ba5 Nd7=+) 7...Na6 (7...ab4!? 8.d4 b6 9.cb6 Nd7–/+) 8.Ba6=+ Ra6 9.b5 a4 10.Qb4 Ra5 11.Nc3 Qa8 (11...Bd3!?=+) 12.Nge2+= Bd3 (better is 12...b6 13.Qf4 Bd3 14.cb6 Bb5+=) 13.bc6 (13.Nf4 Bc4 14.d3 Bb5 15.Nfd5 cd5 16.Nb5+/–) 13...bc6–/+ 14.Rb1? (better is 14.Qg4 h5 15.Qg3 Rc5 16.0–0–/+) 14...Bb1–+ 15.Qb1 Bc5 16.0–0 0–0 17.d4 Rb8 18.Qb8? (18.Qf5 Bd6 19.Rc1–+) 18...Qb8 19.dc5 f5 (19...a3 20.Rb1 Qa7 21.Nd5 cd5 22.c6–+) 20.Nd4 (20.Rb1 Qa7–+) 20...Rc5 21.Rb1 (21.Nde2 Rc4 22.Rc1–+) 21…Qb1 (22.Nb1 Rc1#) 0–1. Zimmer,Georg – Bivens, corr 3GMM–24, 1995.

5.h3 Qb6 6.a3= a5 7.c5 Qc7 8.b5 cb5 (8...b6 9.Qf3 Be4 10.cb6 Qb6 11.Qe2=+) 9.Bb5 Nbd7 (9...Bd7 10.Bd7 Nbd7 (< 10...Qd7 11.Bf6 gf6 12.Nc3+=) 11.Bf6 Nf6=) 10.f4 (better is 10.Bf6!? ef6 11.d4+=) 10...Qc5–/+ 11.Qb3 (11.Nc3 Ne4–/+) 11...Bc2 12.Bd7 (12.Qc3 Qb5 13.Qc2 e6–/+) 12...Nd7–+ 13.Qc3 Rc8 14.Qc5 Nc5 15.Ke2 Nd3 16.Bc3 f6 (better is 16...Nc1 17.Kf2 Nb3–+) 17.Nf3–/+ e5 (17...b5!?–/+) 18.fe5=+ fe5 19.Ne5 (19.Be5 Ne5 20.Ne5 Bd6–/+) 19...Ne5 (better is 19...Rc3!? 20.Nc3 Ne5 21.Nd5 Be4–/+) 20.Be5= Be7 21.Nc3 Bb3 22.a4 Rg8? 23.Rab1+/– Bc4 24.d3 Ba6 25.Nd5 Rc2 26.Kf3 Bd3 27.Rb7 Rf8 28.Kg3 Bd8 29.Bg7 Rff2 30.Rg1 Be4 31.Rb5 Rg2–+ (32.Rg2 Rg2 33.Kf4 Bd5 34.Rd5 Rg7–+) 0–1. Magicmove3 – virtualy, caissa.com, 2007.

5.h3 dc4 6.Bc4 e6 7.a3 =+.

5.Qb3 Nbd7

6.Nc3 e6 7.d4 Bd6 (7...Be7 8.Nf3+=) 8.Nf3 h6 9.Be2 (9.c5 Bc7=) 9...0–0 (9...dc4 10.Bc4 b5 11.Be2+=) 10.a4 (10.c5 Be7=) 10...dc4+= 11.Bc4 Nb6 12.Be2 Nbd5 13.b5 Nc3 14.Bc3 Rc8 15.0–0 Nd5 16.Bd2 Qe7 17.Rfc1 c5 18.Bd3 Bd3 19.Qd3 cd4 20.Nd4 Rfd8 21.Nf5?? (better is 21.Rc8 Rc8 22.e4=) 21...Rc1–+ (21...ef5?! 22.Rc8 Rc8 23.Qd5–/+) 22.Rc1 ef5 23.Qf5 Qe5 (23...g6 24.Qb1–+ (24.Qd5?? Bh2 25.Kh2 Rd5–+)) 24.Qe5 Be5 25.f4 Bb8 26.Rc2 Nb6 (26...f5 27.Kf2–+) 27.a5 (27.Ba5 f6–+) 27...Rc8 28.Ra2 Nc4 29.Rc2 Nd6 30.Rb2 Ne4 31.Kf1 Nd2 (31...Bd6 32.g4–+) 32.Rd2 Kf8 33.Rd7 Bc7 34.b6 ab6 35.ab6 Bb6 36.Rb7 Be3 37.Rb4 Rc2 38.Re4 Bc5 39.Re5 f6 40.Rd5 Ke7 41.f5 Bd6 42.h3 Rc5 43.Rc5 Bc5 44.Ke2 Kd6 45.Kf3 Ke5 46.g4 h5! 47.Kg3 hg4 48.hg4 Bf2! 49.Kf3 Bh4 50.Ke3 Bg3 51.Kf3 Bf4 52.Kf2 Ke4 53.Kg2 Ke3 54.Kh3 Kf3 55.Kh4 Bg5 56.Kh5 Kf4 (56...Kf4 57.Kg6 Kg4 58.Kg7 Kf5–+) 0–1. Maksic,D (2195) – Stankovic,Miodrag (1845), 2nd Gligoric Cup, 2014.

6.Nc3 e6 7.Nf3 h6 8.Rc1 Bd6 9.a4 0–0 10.a5 b6 (10...dc4 11.Qc4 e5 12.Be2=+) 11.b5 (11.Nd4 dc4 12.Bc4 Ne5 13.Nf5 A) < 13...Nc4 14.Nh6 (< 14.Qc4 ef5 15.Ne2 ba5+=) 14...gh6 15.Qc4+/–; B) 13...ef5=) 11...ba5 (better is 11...Nc5!? 12.Qa2 Bd3 (< 12...ba5 13.bc6 dc4 14.Qc4+=) 13.bc6 dc4=+) 12.bc6+= Nc5 13.Qa2 Bd3 14.cd5 Bf1 15.Kf1 Nd3 16.Rb1 ed5 17.Nd5 Ne4 18.Ke2 Nb4 (better is 18...Nef2!? 19.Rhf1 Rb8+/–) 19.Qc4+– Nd5 20.Qd5 Re8 21.Rhc1 Rb8 22.d3 Nf6 23.Bf6 Qf6 24.Qa5 Rb1 25.Rb1 Rc8 26.Rc1 Qb2 27.Qd2 Qb6 28.Qc3 a5 29.Rc2 a4 30.Nd2 a3 31.Qc4 Ra8 32.Qa2 Rc8 33.Qd5 Bc7 34.Ra2 Qa6 35.Nc4 Bb8 36.Ra3 Qc6 37.Qc6 Rc6 38.Ra8 Rc8 39.Nb6 Rd8 40.Nd7 Rd7 41.Rb8 Kh7 42.h4 Ra7 43.h5 Ra5 44.g4 Ra7 45.e4 g6 46.hg6 fg6 47.e5 (47...Ra4 48.Rb7 Kg8 49.f3+–) 1–0. thotares (1650) – Masoud_M, internet, 2006.

6.Nf3 e6 7.c5 b6 8.d4 Rb8 9.Qa3 (9.Qc3!?–/+) 9...a5–+ 10.Nbd2 (10.Bc3 bc5 11.dc5 ab4 12.Bb4 Ra8–+) 10...ab4 11.Qb4 bc5 12.Qc3 c4 (12...cd4 13.ed4 Ne4 14.Qc1–+) 13.Ba3 Ba3 14.Qa3 Qe7 15.Qe7 Ke7 16.Be2 Rb2 17.Nh4 Ra8 18.Nf5 ef5 19.Nc4 dc4 20.Bc4 Nb6 21.Bd3 Raa2 22.Ra2 Ra2 23.0–0 g6 24.Rb1 Nbd7 25.f3 Ra3 26.Rd1 c5 27.Kf2 cd4 28.ed4 Nd5 29.Kg3 Kd6 30.Kh4 h6 31.Rd2 N7f6 32.g3 Ne3 33.Kh3 g5 34.f4 Rd3! (35.Rb2 g4 36.Kh4 Nc4 37.Rb1 Rd2 38.h3 Rh2 39.Rb6 Nb6 40.d5 Rh3#) 0–1. Amor Alcaide,Manuel – Trabert,Bettina (2285), Lillet op, 1999.

6.Nf3 e6 7.d4 dc4 8.Bc4 Bd6 9.Nbd2 Qe7 10.a3 0–0 11.0–0 Ne4 12.Ne4 Be4 13.Be2 e5 14.de5 Ne5 15.Ne5 Be5 16.Be5 Qe5 17.Rfd1 Rad8 18.h3 Rd6 19.Rd6 Qd6 20.f3 Qd2 21.Kf1 Bd5 22.Qd3 Qd3 23.Bd3 Rd8 24.Ke2 Kf8 25.Rc1 (worse is 25.Bh7 Bc4 26.Ke1 g6–/+) 25...a6 26.Rc3 (worse is 26.Bh7 g6+=) 26...h6 27.g4 Ke7 28.e4 Be6 29.f4 f6 30.Ke3 g5 31.Be2 gf4 32.Kf4 Rd2 33.Re3 Rc2 34.e5 fe5 35.Ke5 c5 36.bc5 Rc5 37.Kf4 Kf6 38.h4 Bf7 39.Rg3 Ra5 40.Rc3 (40.g5 hg5 41.hg5 Kg7+=) 40...Ra4= 41.Kg3 b5 42.Bd1 Rc4 43.Rf3 Kg7 44.Rf7 (44.Bb3 Rc7=) 44...Kf7 45.Bb3 Kf6 46.Bc4 bc4 47.Kf4 c3 48.Ke3 Ke5 49.Kd3 Kf4 50.g5 (50.Kc3?? Kg4 51.Kd3 Kh4–+) 50...hg5 51.hg5 Kg5 52.Kc3 Kf6 53.Kb4 Ke7 54.Ka5 Kd7 55.Ka6 Kc7 ½–½. Jurkiewicz,Katarzyna – Przezdziecka,Ewa, Druzynowe Mistrzostwa Polski Kobiet Poland (year?).

5.Nc3 e5

6.a3 Be7 7.cd5 cd5 (worse is 7...Nd5 8.Qf3 Be6 9.Nd5 Bd5 10.e4+=) 8.Bb5 Kf8 9.Nf3 Bg4 10.h3 Bf3 11.Qf3 e4 12.Qf4 Nc6 13.f3 g6? (13...Qd6 14.Qd6 Bd6 15.Rf1=) 14.Qg5 (better is 14.Nd5 Qd5 15.Bf6+–) 14...h6 15.Qg3 Nh5 16.Qh2 Bh4 17.Kd1 Bg3 18.Qg1 Rh7? (better is 18...Be5!?=) 19.Bc6 bc6 20.Ne2 (20.fe4!? de4 21.Ne4+/–) 20...f6 21.Rc1 Rc8 22.fe4 de4 23.Qf1 Rf7 24.Nd4 Attacks the isolani on c6 (24.Ng3? Ng3 25.Qe1 Nh1 26.Qh1 Qd3–+) 24...Qb6 (better is 24...Qd5!?=) 25.Qc4+/– Ng7 26.Ne6 Ne6 27.Qe6 Qa6 28.Qe4 Kg7 29.Qc4 Qb7 30.Rf1 Bd6 31.Qe6 Be7 32.Rf4 c5 33.Rfc4 Re8? 34.Qe4 Qb5+/– 35.Bc3 cb4 ½–½. Aubertin,Tim (2000) – Stephan,Roland, Saarland–ch MB, 2007.

6.Qb3 Na6 7.a3 d4 8.ed4 ed4 (< 8...Qd4 9.Nf3 Qd8 10.Ne5+/–) 9.Nce2 d3 (9...c5 10.Ng3 Be6 11.Nf3=+) 10.Nf4 Qe7 11.Kd1 Ne4 (11...Rd8 12.Ngh3 (< 12.Bd3 Qd6 13.Bf6 Qf6=+) 12...Qd7 13.Bf6 gf6 14.Rc1=) 12.Ngh3+= (12.Nd3 0–0–0 13.Nh3 Bh3 14.gh3 Rd3 15.Bd3 Nf2 16.Kc2 Nh1 17.Bf5 Kb8 18.Rh1 f6=) 12...Bh3 (12...Rd8 13.f3 (< 13.Bd3 Nac5 14.bc5 Nc5=) 13...Qh4 14.c5+=) 13.Nh3 Qh4 (13...Rd8 14.f3 (< 14.Bd3 Nec5 15.bc5 Nc5–/+) 14...Ng5 15.Nf4+/–) 14.f3+/– Nf2 (14...Ng5 15.Ng5 Qg5 16.Qd3+/–) 15.Nf2+– Qf2 16.Qd3 Rd8 17.Qe2 Qe2 18.Be2 f6 19.c5 Nc7 20.Re1 Kd7 21.f4 Kc8 22.Bc4 h5 23.Kc2 Nd5 24.Bd5 Rd5 25.Re6 Rf5 26.g3 h4 27.Rae1 hg3 28.hg3 a6?? 29.Re8 Kc7 30.R1e7! Be7 31.Rh8 g5 32.fg5 Rg5+/– 33.Rh3 Kd7 34.Kd3 Ke6 35.Ke4 Rd5 36.d4 Rf5 37.Rh8 Rf2+= 38.Bc1 f5 39.Ke3?? Rf1?? 40.Bd2 Ra1= 41.Rb8 Ra3 42.Kf4 Ra1 43.Rb7 +=. Kleinke,Uwe – Simon, Wittenburg, 1979.

6.Nf3 =+.

5.Nc3 e6

6.a3 dc4 7.Bc4 Bd6 =+.

6.a3 Bd6 7.c5 Bc7 8.Nge2 Nbd7 9.Ng3 h5 0–1. Beltyukov,Denis – Yarina,Gennady, Samara op, 2008.

6.a3 Nbd7 7.d4 Bd6 8.cd5 (8.Nf3 dc4 9.Bc4 0–0=) 8...cd5 9.Nf3 0–0 10.Be2 Nb6 (10...a5 11.ba5 Ra5 12.Qb3=+) 11.0–0 (11.Rc1 Rc8=+) 11...Rc8 12.Nd2 Qc7 (12...Bb8 13.f4=+) 13.Rc1= Qb8 (better is 13...Nc4 14.Bc4 dc4=) 14.Qb3? (better is 14.g4!? Bg6 15.h4=) 14...Bh2–/+ 15.Kh1 Bd6 16.Nb5 (16.a4 Ng4–/+) 16...Be7–+ 17.a4 a6 18.Nc3 Qd6 19.Ba3 Ne4 20.Nce4–/+ Be4 21.Ne4 de4 22.a5 Nd5 23.Rb1 Rc3–+ 24.Qb2 e5 25.Rfd1? Rfc8 26.de5 Qh6 27.Kg1 Ne3! 28.Rd7 Qg5 29.Re7 Qg2# 0–1. jammboy – RageofKlugman, ChessWorld.net, 2006.

6.Qb3 Be7 7.cd5 ed5 8.Nf3 0–0 9.a4 (9.Nd4 Bg6=+) 9...Nbd7 10.d4 (10.Nd4 Bg6=+) 10...Ne4 (10...Qb6 11.Ba3–/+) 11.Ne4 de4 12.Nd2 Nf6 (12...Nb6 13.f3 Be6 14.Nc4–/+) 13.Bc4 Nd5 14.Bd5 Qd5 15.Qd5 (15.b5 Qd7=+) 15...cd5 16.b5 Rfc8 17.Rc1 Rc1 18.Bc1 Rc8 19.Ke2 Rc2 20.f3 Ra2 21.g4 (better is 21.h3!?–/+) 21...ef3–+ 22.Kf3 Bd3 23.Rg1 (23.Re1 Ra4 24.e4 Bh4–+) 23...Ra4 24.Nb3 (24.b6 ab6 25.g5 Bb4–+) 24…Bb5 0–1. Zylla – Schroeter, BSF–VM A–Turnier, 1995.

6.b5 dc4 7.Bc4 Bd3 (7...a6 8.a4=+) 8.Bd3= Qd3 9.Nf3 a6 10.Ne5 Qd6 11.Nc4 (11.Ng4 Ng4 12.Qg4 ab5=+) 11...Qc5 12.bc6? (better is 12.d3 ab5 13.Nd2=+) 12...Qc4–+ 13.cb7 Ra7 14.Qf3 Qc6 15.Qc6 Nc6 16.b8R Nb8 17.Rb1 Rb7 18.0–0 (18.Ke2 Nc6–+) 18...Nc6 19.Ba1 Rb4 20.Rfc1 Kd7 21.Ne2 Be7 22.Rb4 Nb4 23.a3 Nc6 24.a4 (24.Bf6 gf6 25.a4 Rb8–+) 24...Rb8 25.Nc3 Na5 0–1. Cornacchini,Gabriele – Surender,Anil, IECG, 1999.

6.b5 Bd6 7.Nf3 Nbd7 8.Qc1 c5 9.d4 Rc8 10.cd5 ed5 11.Be2 0–0 12.0–0 Re8 13.dc5 Nc5 14.Qd1 Bb8 15.Qd4 Ne6 16.Qb4 Ne4 17.Rfd1 Bd6 18.Qb3 Nc3 19.Bc3 Be4 20.Rac1 Nc5 21.Qb2 Na4 22.Qa1 (22.Qd2 Rc3 23.Rc3 Bb4+=) 22...Nc3 (22...Ba3 23.Bd4 Bc1 24.Rc1–/+) 23.Rc3+= Rc3 24.Qc3 h6 25.h3 Qd7 26.Nd4 Bb8 27.Qb4 Qc7 28.g3 Qe5 29.h4 g5 30.h5 f5 31.b6 a5 (31...a6 32.Nf3 Qe7 33.Qe7 Re7 34.Nd2=) 32.Qe1 (32.Qa5!? f4 33.ef4 gf4 34.f3+=) 32...f4= 33.Bb5 (33.Qa5 fg3 34.Qe1 gf2 35.Qf2 Rf8–+) 33...Re7 34.ef4 gf4 35.Qc3?? (better is 35.f3 Bh7 36.Qe5 Re5 37.Rc1=) 35...Qh5 36.f3 fg3 37.Qc8?? (37.Rd2 Bf4 38.Re2–+) 37...Kf7 38.Rd2 Bf3 39.Nf3 (39.Qf5 Qf5 40.Nf5 Re1 41.Bf1–+) 39...Qf3 40.Qc5 Bf4 (40...Bf4 41.Qd5 Qd5 42.Rd5 Kf6–+; 40...Re1 41.Bf1 Rf1) 0–1. Novikov,Konstantin Ivan (2215) – Maksoev,Georgy (1950), Voronezh op–B, 2007.

6.c5 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1 b6 =+.

6.c5 b6 7.a3 (7.d4!?=+) 7...bc5–/+ 8.bc5 Bc5 9.Nf3 Nbd7 (9...0–0 10.d4 Bd6 11.Rc1–/+) 10.d4 (10.Na4 Bd6–/+) 10...Bb6 (10...Rb8 11.Qe2 Bd6 12.Rc1–/+) 11.Bd3 Ne4 (11...Bd3 12.Qd3 c5 13.dc5 Nc5 14.Qb5 Nfd7 15.0–0–/+) 12.Be4 (12.Qc2 Nd6=+) 12...de4–/+ 13.Nh4?? (13.Nd2 Ba5–/+) 13...0–0 14.Nf5=+ ef5 15.0–0 Nf6 16.d5 cd5–/+ 17.Nb5 Ng4 18.h3–/+ Nf6 19.Bf6 Qf6–+ 20.Nd6?? Qd6 21.Rb1 Rac8 22.Rc1 Qa3 23.Rc8 Rc8 24.Qb1 d4 25.ed4 Bd4 26.Rd1 Bb6 27.Qb5 g6 28.Rd5 Qc1 29.Kh2 Bc7 30.g3–+ Qc2 31.Kg2 Bb6 32.Qf1 e3 33.Re5 ef2 34.Re2 Qc6 35.Kh2 Re8 36.Re8 Qe8 37.Kh1 Qe1 38.Kg2 a5 39.Kf3 a4 40.Qe1 fe1Q 41.Kf4 Qe4 42.Kg5 Kg7 43.g4 Bd8# 0–1. badboy1221 – Space, Live Game Caissa's Web, 2005.

6.d4 Bb4–/+ 7.Nf3 Nbd7 8.Be2 Ne4 9.Qb3 Bc3 10.Bc3 Nc3 11.Qc3 0–0 12.0–0 f6 13.c5 Qe7 14.a4 Be4 15.Nd2 Bg6 16.a5 e5 17.a6 ba6 (17...ed4 18.Qd4 Nc5 19.ab7 Nb7 20.Rfc1–/+) 18.Ra6 (18.Rfe1 Rac8+=) 18...Rfc8 (18...ed4 19.Qd4 Qc5 20.Qc5 Nc5 21.Rc6 Rac8+=) 19.Rfa1? (19.Re1 Rc7+=) 19...Rc7 (better is 19...ed4 20.Qd4 Nc5–+) 20.Bf3+= e4 21.Bg4 f5 22.Be2 Nb8 (22...Nf6 23.Qa3=) 23.Rb6 ab6 24.Ra8 Rb7?? (better is 24...Qd8+=) 25.Ba6+– Rd7?? (25...Be8 26.Bb7 Qb7+–) 26.Rb8 Kf7 (26...Rd8 27.Rb7 Qf6 28.cb6 f4+–) 27.cb6 Rd8 (27...f4 28.b7 Bf5+–) 28.Rd8 Qd8 29.Qc6 Ke7 30.Qc7 Ke8 31.Bb5 (31.Bb5 Kf8 32.Qd8 Kf7 33.Qd5 Ke7 34.Qd7 Kf6 35.Qd8 Kf7 36.Bc4) 1–0. Douteil,Dominik (2165) – Weyers,Kai (1870), remoteschach.de, 2007.

5.c5 Nbd7

6.d4 e6 7.Nf3 Be7 8.Be2 b6 9.Nbd2 0–0 10.Nh4 Bg4 11.Bg4 Ng4 12.Qg4 Bh4 13.0–0 bc5 14.bc5 Rb8 15.Bc3 Bf6 16.Rab1 Qc7 17.Nb3 Rb5 18.a4 Rb7 19.Ba5 Qc8 20.f4 Re8 21.Qe2 Nf8 22.Nd2 Ree7 23.Qa6 Rb8 24.Qc8 Rc8 25.Nf3 g6 26.Rf2 a6 27.Rfb2 Nd7 28.Rb7 Kf8 29.g4 h5 30.g5 Bh8 31.Kf2 Bg7? (31...Kg7!?) 32.Ne5 Ne5 33.Re7 Ng4 0–1. Zeun – Vettenburg, corr SOK–96–116 1966 (Vettenburg).

6.Nf3 a5 7.a3 b6 (7...ab4 8.ab4 Ra1 9.Ba1=) 8.Nd4+= Bb1 (8...Bg4 A) 9.Nc6?! Qc8 (< 9...bc5 10.Nd8 Bd1 11.Nb7+/–) 10.f3 Qc6 11.fg4 bc5=; B) 9.f3 bc5 10.bc5+/– (< 10.fg4 cd4 11.g5 Ne4–/+)) 9.Rb1 bc5 (9...ab4 10.Nc6 Qc7 11.Nb4 bc5 12.Na6=) 10.Nc6+/– Qc7 11.b5 e6 12.Be2 Bd6 13.Bc3 (13.f4 0–0+=) 13...Ne4 14.Ba5 (14.Bg7 Rg8 15.d3 Nf2 16.Kf2 Rg7 17.Kg1=) 14...Ra5–/+ 15.Na5 (15.f3 Bg3! 16.Kf1 Nf2–+) 15...Qa5 16.f3 Nef6 17.0–0 0–0 18.Qc2 c4 (18...Qa3 19.Ra1 Qb4 20.Ra4+–) 19.a4 Ra8 20.Ra1 Nc5 (20...Nb6 21.d3–/+) 21.Rfb1–/+ Nfd7 22.Bd1 Nd3 23.f4 Bf4! 24.b6?? Be3! 25.Kf1 Bb6 26.Rb5 Qb5! 27.ab5 Ra1 28.Ke2 N7e5 29.g3 Ra2! 30.Qb1 g6 31.Bc2 Rb2 32.Qa1 Rc2 33.Qa6 Nd7 34.Qc8 Nf8 35.Qb8 Ba5 36.b6 Rd2 37.Ke3 Rb2 38.b7 Nc5 39.Qa7 Nb7 (40.Kf3 e5–+) 0–1. Gorzel,S – Skibbe,Diana (2035), BL2 Mitte, 1991.

5.d4 e6

6.a3 Nbd7 7.c5 Be7 8.Bd3 Bd3 9.Qd3 Ne4 10.Nd2 Ndf6 11.Ne4 Ne4 12.Nf3 g5 13.h3 (13.Ne5 f6 14.Nc6 bc6+=) 13...h5 14.Nd2 f5 Black intends g4 15.f3 Ng3 16.Rg1 Kd7 17.e4 fe4 18.fe4 g4 19.0–0–0 (19.Qg3?? Bh4 20.Qh4 Qh4 21.Ke2 Rhf8–+) 19...Bh4 20.ed5 ed5 21.Rge1 Qf6 22.Re3 (22.b5!?=) 22...Qf2–/+ 23.Rde1 Rae8 (better is 23...Rag8–/+) 24.Re8= Re8 25.Re8 Ke8 26.Qg6 (26.hg4 hg4 27.Qg6 Kd8 28.Qg4 Ne2 29.Kb1 Bg3+=) 26...Qf7= 27.Qd6 Qe7 (27...Qf4! 28.Qe6 Be7 29.Qc8 Kf7=) 28.Qb8+= Kf7 29.Qf4 (worse is 29.Qa7 Bg5 30.Kc2 Bd2 31.Kd2 Ne4 32.Kc2 gh3 33.gh3 Ng5=) 29...Kg6 30.hg4?? (better is 30.Kc2 gh3 31.gh3=) 30…Ne2–+ (30...Ne2 31.Kb1 Nf4 32.gh5 Kh5–+) 0–1. Fournier,Frederic (2215) – Vekemans,Paul, Ch Club, 2002.

6.c5 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1 b5 10.Nf3 Be7 11.Ne5 Qc7 12.f4 Ne4 13.Be2 (13.Bd3 Bh4 14.g3 Bf6=+) 13...f6 14.Nf3 Qa7 15.Nc3 Qa3 16.Ne4 Be4 17.0–0 Qe3 18.Kh1 Na6 19.Qe1 (19.Nd2!? Nb4 20.Ne4 de4–+ (20...Qe4?! 21.Qd2–/+)) 19...Nb4! 20.Qb4 Qe2 21.Re1 Qf2 22.Qc3 (22.Qd2 Qd2 23.Nd2 Bf5–+) 22...Bf3 23.gf3 0–0 24.Bb2 e5! 25.de5 (25.Re5 Qf1) 25...Bc5 26.Rc1 Be3 (27.Qc2 Qf3 28.Qg2 Qg2 29.Kg2 Bc1 30.Bc1 fe5 31.fe5 c5–+) 0–1. dannyboy238 – schaep1, ChessWorld.net, 2004.

6.Bd3 Bb4 7.Nc3 (7.Bc3 Bd3 8.Qd3 Be7–/+) 7...Qa5–+ 8.Nge2 Ne4 (8...Bd3!? 9.Qd3 Qa6 10.a3–+) 9.Be4–/+ Be4 10.0–0 Bg6 11.c5 Qd8 12.Nf4 Nd7 13.Ng6 hg6 14.f4 (14.Qb3 Ba5–/+) 14...Qh4 (14...b6 15.a3 Ba5 16.Ne2–/+) 15.Ne2?? (better is 15.h3–/+) 15…Qh2–+ (16.Kf2 Nf6–+) 0–1. gtate (1930) – cmarcolino (2435), net–chess.com, 2004.

5.cd5 cd5

6.a3 e6 7.Nf3 Nc6 8.Be2 a6 9.Nh4 Bb1 10.Qb1 Ne4 11.g3 e5 12.Qa2 Be7 13.Nf5 Bf6 14.d3 Nd6 15.Nd6 Qd6 16.0–0 d4 17.Qb3 0–0 18.Bf3 Rac8 19.Rac1 b5 20.Rc5 Ne7 21.ed4 ed4 22.Rfc1 Rc5 (22...Qd7!?+/–) 23.bc5 Qc7 24.c6 Rc8 25.a4 Qb6 26.ab5 ab5 27.Qb4 Nc6? (better is 27...h6+–) 28.Qd6 Be5 (28...Rd8 29.Qc6 Qc6 30.Rc6 b4+–) 29.Qe5 (29.Qe5 Qd8 30.Rc6 Rc6 31.Bc6+–) 1–0. Fritz11 – jumbo, casual, 2013.

6.a3 e6 7.Nf3 Bd6 8.Bb5 Nbd7 9.0–0 0–0 10.d4 a6 11.Bd3 Bd3 12.Qd3 b5 13.Nbd2 Nb6 14.Nb3 Nc4 15.Bc3 Qe7 16.Nc5 Rfc8 17.a4 h6 18.Ra2 Ne4 19.Rfa1 Nc3 (worse is 19...Nc5 20.dc5 Bc5 21.bc5 Qc5 22.ab5 Qb5 23.Qd4+–) 20.Qc3 a5 21.ab5 ab4 22.Qb4 (better is 22.Ra8 bc3 23.Rc8 Kh7 24.Rc6+=) 22...Ra2–/+ 23.Ra2 Bc5 24.dc5 Qc5 (24...Rc5?! 25.Ra8 Kh7 26.Rc8=) ½–½. Torotto,Antal (2130) – Chrast,Adrian (2015), SVK–chT2B, 2008. (=1.c4 Nf6 2.b4 c6 3.e3 d5 4.Bb2 Bf5 5.cd5 cd5)

6.Nf3 e6 7.b5 Nbd7 8.Be2 Bd6 9.Nh4 Bg6 10.Ng6 hg6 11.a4 a6 12.Nc3 a5 13.Rc1 Rc8 14.h3 Nb6 15.0–0 0–0 16.d3 Qe7 17.Na2 Rc1 18.Bc1 Nfd7 19.Bd2 Ra8 20.g3 Nc5 21.Nc3 e5 22.Bf3 e4 23.de4 de4 24.Bg2 Qe6 25.Be1 Be7 26.f3 Rd8 27.Qe2 ef3 28.Qf3 Nd3 29.Ne2 29...Ne1 30.Re1 Bc5 31.Kh2 Rd7 32.Nf4 Qb3 33.e4 Qf3 34.Bf3 Rd2 35.Kh1 Na4 36.Ra1 Rd4 37.Nd5 b6 38.Ra2 Rc4 39.Kh2 Kf8 40.Bd1 Nc3 41.Rc2 Bd4 42.Nc3 Rc3 43.Rc3 Bc3 44.g4 Ke7 (45.Bb3 Be5 46.Kg2 Kf6–/+) 0–1. marekt – schaep1, ChessWorld.net, 2004.

6.Nf3 e6 7.Bb5 Nc6 8.a3 (8.Nd4 a6 9.Bc6 bc6+=) 8...a6 (8...Nd7 9.0–0=) 9.Bc6 bc6 10.0–0 (10.Nd4 Qd6+=) 10...Bd6 (10...c5=) 11.Nd4 (11.Qa4 Qb6=) 11...Bb1 (better is 11...Bd3!? 12.Re1 Qc7=+) 12.Rb1+= Qc7 13.Qc2 (13.f4 c5 14.bc5 Bc5+= (< 14...Qc5 15.Qa4 Kf8 16.Rfc1+/–)) 13...Bh2= 14.Kh1 0–0 (14...Be5 15.Nc6 Bb2 16.Rb2=) 15.Qc6 (15.g3 Bg3 16.fg3 Qg3=) 15...Qc6 (15...Ne4 16.Qc7 Bc7 17.Rbd1=+) 16.Nc6+= Bd6 17.Rbc1 h5 18.Bf6+= gf6 19.Na5 Kh7 20.Rc6 Be5 21.d4+– Bb8 22.g3 Kg6 23.Nb3 e5 24.Nc5+– ed4 25.ed4 Re8 26.Nd7 Re6?? 27.Re6 fe6+= 28.Nc5 e5= 29.de5 fe5 30.Kg2 Bd6 31.Rc1 d4 32.Ne4= Be7 33.Rc6 Kf5 34.f3 a5= 35.Rc7 Bd8 36.Rh7= ab4 37.ab4 Ra2 38.Kh3+= Kg6 39.Rd7 Bg5 40.Rd6 Kf5 41.b5 Ra3= 42.b6 Rf3 43.b7 Rb3=+ 44.Nc5 Rb4 45.Rc6?? e4?? 46.Rc8= d3 47.Rf8 Ke5 48.Nd3 ed3 49.b8Q Rb8 50.Rb8 d2 51.Rb1 ½–½. coloplayah (1990) – mfhaoc (1790), net–chess.com, 2005.

6.Nf3 e6 7.Nd4 Bg6 (7...Bb4? 8.Qa4 Nc6 9.Nc6 bc6 10.Qb4+–) 8.Nc3 Be7 9.h4 h5 10.a3 0–0 11.Nce2 Nbd7 (11...Bd3!?=) 12.Nf4+= (12.Nf4 Bh7 13.Nh5+=). Woelfelschneider,Peter – Ainberger, 2009.

6.Bf6 gf6 7.Bb5 Nc6 8.Qa4 Qb6 9.Nc3 e6 10.Nf3 Rc8 11.Nd4 Bg6 12.a3 Bd6 13.Nc6 bc6 14.Ba6 Rd8 15.Rc1 0–0 16.d4 e5 17.Ne2 ed4 18.Rc6 Qb8 19.Nd4 Be5 20.Qd1 Rd6 21.Rd6 Qd6 22.Be2 Rc8 23.g3 Bd4 24.Qd4 Rc1 25.Bd1 Rc4 26.Qa7 d4 27.0–0 de3 28.Qe3 Rd4 29.Qe8 Kg7 30.Bf3 Rd3 31.Qa8 Bf5 32.Re1 Bh3 33.Bg2 Bg2 34.Kg2 1–0. marekt – keyrock, GameColony.com, 2002.

5.cd5 Nd5

6.a3 Nd7 7.Be2 N7f6 8.Nf3 e6 9.d4 Bd6 10.Nc3 Nc3 11.Bc3 0–0 12.0–0 a5 (12...Nd5 13.Qb3+=) 13.ba5= Nd5 14.Bd2 Bc7 15.Qb3 Ba5 (15...Qd7!?+=) 16.Ba5+/– Ra5 17.Qb7 Nc3 (17...Qa8 18.Qa8 Rfa8 19.Ne5 Ra3 20.Ra3 Ra3 21.Nc6+/–) 18.Bc4 Nd5 (18...c5!?+/–) 19.Qc6+– Be4 (19...Nc3 20.Bb3 Ne2 21.Kh1+–) 20.Bd5 (better is 20.Nd2 Bf5 21.Nb3+–) 20...Bd5+/– 21.Qc3 Bf3 22.gf3 Rg5 (better is 22...Rh5!? 23.Rfb1 Qg5 24.Kf1 Rh2+=) 23.Kh1+/– Qf6 24.Rg1?? (24.f4 Ra8+–) 24...Qg6 (24...Qf3 25.Rg2 Qg2) 25.Rg5 Qg5 26.Rg1 Qh5 27.Rg3 f5 (27...Ra8 28.e4+–) 28.a4 (28.d5!? Qf7 29.de6 Qe7+–) 28...f4+/– 29.ef4 Rf4 (29...Qf7+–) 30.Kg2 1–0. Fournier,Frederic (2060) – camarondlaisla (1780), Active (1/0), 2005.

6.a3 e6 7.Nc3 Nc3 8.Bc3 Nd7 9.Nf3 Nf6 10.Be2 Bd3 11.0–0 Be7 12.Bd4 Be2 13.Qe2 0–0 14.d3 Qd5 15.Ne5 Rfd8 16.f4 Nd7 17.Rab1 Ne5 18.fe5 Rd7 19.Qf2 Bf8 20.Qc2 a5 21.Rb3 ab4 22.ab4 Ra4 23.Qc3 Ra2 24.Rf2 Ra1 25.Rf1 Rf1 26.Kf1 Qb5 27.Bc5 Rd8 28.Ra3 b6 29.Bf8 Rf8 30.Kg1 h6 ½–½. Pott,Brian (1750) – Poulsen,Rene (2080), TE.2004.P.01709, 2004.

6.a3 e6 7.Nf3 a5 8.b5 Nd7 (8...Qb6 9.Qa4 Nd7 10.Nc3=) 9.d3 (9.Nd4 Bg6=) 9...N5f6 (9...Bg4!?=) 10.bc6+= bc6 11.Nbd2 (11.Nd4 Qb6 12.Qc2 Rb8+=) 11...Bc5 (11...Nc5 12.e4 Bg4 13.Qc2+=) 12.Be2 (12.Nb3 Bd6+=) 12...0–0 (12...Rb8 13.Rb1=) 13.Qc2 (13.Nb3 Rb8+=) 13...Qe7 (13...Rb8 14.0–0+=) 14.Nc4 (14.e4 Bg6+=) 14...Rfb8 15.Nfe5 Ne5 16.Ne5 Qb7 (16...Rb6 17.e4 Bg6 18.Ng6 hg6 19.e5=) 17.Ra2 Qb3 18.Bc1 (18.Qb3 Rb3 19.e4 Rab8+=) 18...Qd5= 19.f4 Qg2 20.Bf3 Qc2 21.Rc2 Bf8 22.Nc6 Bd3 23.Nb8 Rb8 24.Rc3 Bg6 25.Kf2 Ne4+= 26.Be4 Be4 27.Rd1 Be7 28.Rd7 Bd8 29.Rd2 Bf6 30.Rc4 Bd5 31.Rc5 a4 ½–½. Benassi,Aspasio (2150) – Polevoy,Nickolay (2070), IECG, 2002.

5.f4 e6

6.a3 dc4 7.Bc4 b5 =+.

6.a3 Be7 7.Nf3 0–0 8.Nc3 Nbd7 (8...dc4 9.Bc4 b5 10.Be2=+) 9.Be2 (9.Nd4 Bg4 10.Qc2 c5 11.bc5 Bc5=+) 9...dc4 10.Bc4 Nb6 11.Be2 Nfd5 12.Nd5 cd5 13.d3 Qd7 (13...a5 14.ba5 Ra5 15.0–0=) 14.0–0 Rfc8 (14...Rac8 15.Ne5 Qd6 16.g4+/–) 15.Qd2 (15.Ne5 Qa4 16.g4 f6 17.gf5 Rc2+/–) 15...Na4= 16.Bd4 Qd8 17.Ne5 f6 18.Nf3 Bg4 19.Rfc1 a5 (19...b6 20.Bd1 Qd7 21.h3=) 20.Rc8+= Rc8 21.Bd1 (21.ba5 Qc7+=) 21...Bf3 (21...b5 22.ba5 Ra8 23.Ba4 ba4 24.Bb6=) 22.Ba4 (22.Bf3 ab4 23.Bg4 f5 24.ab4 b5=) 22...Bh5 (22...Bg4 23.Bb5=) 23.ba5+= Bc5 24.Bc5 Rc5 25.Rc1 Qc7 26.Rc5 Qc5 27.Kf2 d4 28.Bb3 Bf7 29.ed4 (29.Bc4 de3 30.Qe3 Qa5 31.Be6 Qa3+=) 29...Qd4= 30.Kf3 f5 (30...Qg1 31.Kg3 Qd4 32.Bd1+=) 31.Bc4+/– e5 32.Bf7 Kf7 33.fe5 Qe5 34.Qb4 Qd5 35.Kf2 Kg6 (35...g5 36.d4+=) 36.d4+/– Qe4 37.Qd6 Kf7 38.h3 f4 39.Qc7 ½–½. Mothes,Rainer – Vettenburg,L, corr SOK–95–110, 1997.

6.b5 dc4 7.Bc4 Be7 8.Nf3 0–0 9.Nc3 cb5 10.Nb5 Nc6 11.Nbd4 Nd4 12.Bd4 Rc8 13.Qb3 Qc7 14.Rc1= b5 (14...b6 15.0–0 Qd7 16.Ba6 Rc1 17.Rc1=) 15.Qb5+= Ba3 16.Be5 Qc5 (16...Qe7 17.Rc3+=) 17.Qc5+/– Rc5 18.Bd6 Bc1 19.Bc5 Rc8 20.Ke2 Bd2 21.Nd2 (< 21.Ba7 Rc4 22.Nd2 Rc2–/+) 21...Rc5 22.Rc1 Kf8 23.Nb3 Rc8 24.Bd3 Rc1 25.Nc1 Ne4 26.Kf3 Nd2 27.Ke2 Ne4 28.a3 Ke7 29.Nb3 Nc3 30.Kd2 Nb1 31.Bb1 Bb1 32.Kc3 Kd6 33.Nd2+= Ba2 34.Kd4 f5 35.e4 Kc6 36.g3 Kb5 37.Kc3 Kc5 38.Kb2 Bc4 39.Kc3 Ba2 40.Kb2 Bc4= 41.Kc3 Ba2 42.e5 Kd5 43.Kd3 Kc5 44.Nf3 h6 45.h4 Bc4 46.Kc3 Bd5 47.Nd4 Ba2 48.a4 a6= 49.Nc2 Bd5 50.Nb4 Bb7 51.Nd3 Kd5 52.Kb4 Kd4 53.Nc5 Bc8 54.h5 Ke3 55.Ka5+/– Kf3 56.Kb6 Kg3 57.Kc7 Kf4 58.Kc8 Ke5 59.Na6 f4 60.Nc5 f3= 61.Nd3 Kd4–/+ 62.Ne1 f2 63.Nf3 Kd3 64.Nh2= e5 65.a5 e4 66.a6 e3 67.a7 e2 68.a8Q e1Q 69.Kd7 Qg1 70.Qd5= Kc3 71.Qc5 Kd3 72.Qb5 Ke4 73.Nf1 Kf4 74.Ke8 Qg5 75.Qc4 Kf5 76.Kf8 Qf6 77.Kg8 Kg5 78.Qd5 Kh4 79.Qh1 Kg5 80.Qd5 Kh4 81.Kh7 Qf4 82.Qh1 Kg5 ½–½. Smolensky,Yury Andreyevich – Kuehnel,Guenter, corr ICCF EU/FSM/30, 1985.

6.c5 b6 7.cb6 ab6 8.b5 –/+.

6.c5 Be7 7.Nf3=+ Nbd7 (7...0–0 8.Nd4=+) 8.Be2 (8.Nd4 Bg6=+) 8...0–0 (8...a5 9.a3=+) 9.Nc3 (9.Nd4 a5 10.a3 ab4 11.ab4 Ra1 12.Ba1 Bb1 13.Qb1 Qc7=) 9...b6 (9...a5 10.a3=+) 10.Nd4= Qc7 (10...bc5 11.Nc6 Qe8 12.Nb5+=) 11.b5 (11.cb6 ab6 12.b5 c5 13.Nf5 ef5=) 11...bc5 (11...Bc5 12.Nc6 a6 13.Rc1=+) 12.Nc6 Nb6 (12...Bd6 13.g4 Be4 14.Ne4 Ne4 15.d3=) 13.g4 Be4 14.Ne4 (14.0–0!? c4 A) 15.Ne4?! Ne4 (< 15...de4 16.a4+/–) 16.d3 c3 17.de4 cb2=+; B) 15.a4+/–) 14...Ne4= 15.0–0 Bf6 16.Bf6= Nf6 17.Qc2 c4 18.g5 Ne8 19.a4 Nd6 20.Rf3 a6–/+ 21.Rh3 g6 22.Ne5 ab5 23.Ng4 Nd7 24.Qb2 Nf5 25.Qb5? f6 26.a5 fg5 27.fg5 Rab8 28.Qa4 Nc5 29.Qa2 Ne4–+ 30.Nh6? Nh6 31.gh6 Rf2 32.Re1 Rh2!! 33.Rh2 Qg3 34.Rg2 Qe1 35.Kh2 Rb1 36.Kh3 Qh1 37.Rh2 Ng5 38.Kh4 Qh2 39.Kg5 Qe5 40.Kh4 Rh1 41.Kg4 Rg1 (42.Kh3 Qg3#) 0–1. Kleinke,Uwe – Guzy, corr DDR–ch I730, 1988.

6.Nf3 Bb4–/+ 7.Qb3 Qe7 8.a3 Bd6 9.Ne5 Bb1 (9...Ne4!? 10.Nf3 0–0–+) 10.Rb1 0–0 11.Bd3 Na6 (11...Rd8 12.0–0–/+) 12.Qc3 (12.Bd4!? c5 13.Bc3=+) 12...Nc5–/+ 13.Bc2 Rfd8 (13...Nfe4 14.Qd4 Be5 15.Qe5–+) 14.0–0 (14.Ng4 Ncd7–/+) 14...Rac8 (14...Be5 15.fe5 Nfe4 16.Be4 de4 17.Rf4–/+) 15.Ng4 Ne8 (15...Ncd7 16.Ne5–/+) 16.Nh6 (16.d4 Ne4 17.Be4 de4=+) 16...Kh8–/+ 17.Rf3 (17.d4!? Ne4 18.Be4 de4 19.c5 gh6 20.cd6 Qd6 21.Qa5=+) 17...Ne4 18.Be4 de4 19.Rg3 f6 20.Ng4 Bc5 21.Nf2 f5 22.h4 Nf6 23.Kh1 Rd7 24.Rg5 Rcd8 25.Bc1 a6 26.a4 b6 27.h5 h6 28.Rg6 a5 29.Rb2 Bb4 30.Qc2 Nh5 31.Kg1 Kh7 32.g4 Kg6 33.gh5 Kh7 0–1. Serrano Pertinez,Miguel (2210) – Rosich Valles,Alfredo (2370), Catalunya Club op, 1999.

4.c4 Nc6

5.a3 dc4 6.Bc4 Bd3 7.Qb3 Bc4 8.Qc4 Qd5 9.Qd5 Nd5 10.Nf3 e6 11.0–0 a5 12.b5 Na7 13.a4 c6 14.bc6 Nc6 15.Nc3 Rd8 16.d4 Bd6 17.Rfc1 0–0 18.Nb5 f6 19.Nd6 Rd6 20.Ba3 Ncb4 21.Bb4 ab4 22.a5 Rc6 23.Rc6 bc6 24.a6 b3 25.Rb1 Rb8 26.a7 Ra8 27.Rb3 Ra7 28.h3 Ra1 29.Kh2 Ra2 30.Kg3 Kf7 31.Rb7 Kg6 32.Rb8 Nc3 33.Rc8 Ne4 34.Kf4 Nf2 35.Rc6 Nd3 36.Kg3 Kf7 37.e4 Rb2 38.d5 ed5 39.ed5 Kg6 40.d6 Rb7 41.Rc7 Rb5 42.d7 Rd5+/– ½–½. Bonetti,Shane – Sigma 4, 2000.

5.a3 dc4 6.Bc4 Bd3 7.Qb3 Bc4 8.Qc4 e6 9.d4 Qd5 10.Qd5 ed5=. Dopper – in 't Veld, 1990.

5.a3 e5 6.Nf3 (6.b5 Na5=) 6...e4 7.Nd4 Nd4 8.Bd4 c6 (8...a5 9.ba5 Ra5 10.Qb3=) 9.Qb3 (9.cd5 Nd5 10.d3 a5 11.de4 Be4=) 9...Be7 (9...Qd7 10.Bf6 dc4 11.Qc4 gf6 12.d4=) 10.h3 (10.cd5!? cd5 11.Bb5 Bd7 12.Bd7 Qd7 13.Nc3=) 10...0–0+= 11.d3 Qd7 (11...dc4 12.dc4 a5 13.ba5 Qa5 14.Nd2+=) 12.Nd2 (12.cd5 ed3 13.Bd3 Bd3 14.Qd3 Qd5=) 12...ed3 (12...a5 13.de4 Be4 14.Ne4 Ne4 15.cd5+=) 13.Bd3= Bd3 14.Qd3 a5 15.c5 ab4 16.ab4 Opening the a–file gets White a lot of play 16...Ra1 17.Ba1 Qe6 (17...b6 18.cb6 Rb8 19.0–0=) 18.0–0 Ne4 19.Nf3 (19.Bd4 f5=) 19...Ra8 20.Bd4 Bf6 (20...Qg6 21.Ra1 Ra1 22.Ba1=) 21.Qc2 (21.Ra1 Ra1 22.Ba1 Ba1=) 21...Bd4 22.Nd4 Qe5 23.Qb2 Qf6 24.f3 Ng5 25.Ra1 Re8 26.Ra7 Qe5 27.Qf2 Qb8= 28.Ra3 Ne6 29.Qh4 Nd4 30.Qd4 Qg3 31.Kf1 h6 32.b5 Qg6 33.Rb3 Qc2+= 34.Rb2 Qc1–+ 35.Kf2 Re3! 36.Qe3 Qb2 37.Kg3 Qb5 38.Qe8 Kh7 39.Qf7 Qc5 40.Qf5 Kg8 41.Qe6 Kf8 42.Qf5 Ke8 43.Qc8 ½–½. Smolenskiy,Yuriy Andreyevich – Thorn,MJW, corr ICCF–Cup8/9 V111, 1990.

5.a3 e6 6.Nf3 Bd6 (6...a6 7.cd5 ed5 8.b5=) 7.c5+= Be7 8.Be2 a6 9.d4 0–0 10.0–0 Ne4 (10...Ne4 11.Nc3 Qd7=). Dopper,Johan – in 't Veld, 1990.

5.Qb3 e6 6.a3 Ne4 7.Nf3 Be7 8.Nc3 d4 (better is 8...dc4!? 9.Qc4 Nd6=) 9.Ne4+/– Be4 10.Nd4 (worse is 10.ed4 Bf6+=) 10...Nd4 11.Bd4 Bf6 12.Bc3 0–0 13.f3 Bh4 14.Ke2 Bd3 15.Kd1 Bf1 16.Rf1 Qd3 17.Rh1 Rfd8 18.Rc1 (18.e4 Rd7+=) 18...Bf6 (18...Qe3! 19.Qb2 Rd3–/+) 19.Qc2 Bc3 20.Qc3 Qe2?? (20...Qg6 21.Rg1+=) 21.Kc2 (better is 21.Ke2 Rd7 22.Kf2+–) 21...g6 (21...Qg2?? 22.Rhg1 Rd2 23.Kb3+–) 22.Rhg1 Rd7 23.Rce1 Qf2 24.Rd1 Rad8 25.h3 Qe2 26.Rde1 Qd2 27.Qd2 Rd2 28.Kb3 R8d3 29.Ka4 Ra2 30.Ra1?? Rda3 (30...Rda3 31.Kb5 Ra1 32.Ra1 Ra1–+) 0–1. Valente – Lupascu, EU Union–ch U12, 2008.

4.Bd3 Bd3

5.cd3 Nbd7 6.g4 (6.Nf3 e6 7.a3 Bd6+=) 6...h6–/+ 7.h4 (7.f4 e6–/+) 7...e5 Black gets the initiative 8.a3 a5 9.ba5 Nc5 10.Qc2 e4 (worse is 10...Ng4 11.f3 Nf6 12.Be5+=) 11.de4 de4 (11...Nce4 12.d3 Nc5 13.Bf6 Qf6 14.d4 Ra5 15.g5 hg5 16.hg5 Qg5 17.Rh8 Qg1 18.Ke2–/+; 11...Nfe4?! 12.f3 Nf6 13.Bf6 Qf6 14.Qc3 Qc3 15.Nc3 Ra5 16.a4+=) 12.Nc3? (12.f3!? Qd3 13.Qd1 Nd5–+) 12...Ng4 (12...Qd3 13.Rc1 Qa6 14.Nh3 Nd3 15.Kd1–+) 13.Nd1 (13.Ke2 Qd3 14.Qd3 Nd3–+) 13...Nd3 (13...Qd6 14.Bc3–+) 14.Kf1 Qd5 15.f3 Qb5 16.Nc3 Qc4 (worse is 16...Qb2 17.Qb2 Nb2 18.fg4 Ra5 19.Ne4–/+) 17.fg4 Nb2 18.Nge2 Nd3 19.Kg2 (19.Rb1 Ra5 20.Qb3 Qb3 21.Rb3 Nc5–+ (21...Ba3?! 22.Ne4 Ne5 23.Rb7–/+; 21...Ra3?! 22.Rb7 Kd7 23.Ne4+=)) 19...Ra5 20.Ng3 Re5 (20...Ba3 21.Nge4 Bb4 22.Ra5 Ba5 23.Qa2 Qa2 24.Na2–/+) 21.Qa2 White gets in control 21...Qa2 (21...Qc6!? 22.Rhf1 Re6 23.Nce4–+) 22.Ra2–/+ Nc5 23.Rf1 Be7 24.Kh3 0–0 25.Rf5+= Re6 26.Nd5 Bd6 27.Nc7 Bc7 28.Rc5= Bg3 29.Kg3 Rd8 30.Kf4 Red6? 31.Ke4+/– Rd2 32.Rd2 Rd2 33.Rc8 Kh7 34.Rc7 b5 35.Rf7+– Ra2 36.Rb7 Ra3 37.Rb5 Ra4 38.Kf3 Kg6 39.Rb6 Kf7 40.h5 Ke7 41.e4 Ra3 42.Kf4 Ra5 43.e5 Ra7 44.Kf5 Kf7 45.Rd6 Rb7?? 46.Rd7!! (46.Rd7 Rd7 47.e6 Ke8 48.ed7 Kd7 49.Kg6+–) 1–0. Gutman (2485) – Lee (2230), London, 1985.

5.cd3 e5 6.b5 (6.Be5 Nc6 7.d4 Nd7=) 6...Nbd7 7.Nf3 Bd6 8.0–0 0–0 9.Nc3 Qe8 10.a4 e4 (10...a6 11.Qc2=+) 11.de4= de4 (< 11...Ne4 12.Nd5 Qe6 13.Nc3+/–) 12.Nd4 Nb6 (12...Ne5 13.f3=) 13.d3 (13.Qe2 Nbd5=) 13...ed3 (13...Qe5 14.g3=) 14.Qd3 Qe5 (14...Ng4 15.h3 Ne5 16.Qc2=) 15.Nf3 (15.f4 Qc5=) 15...Qh5= 16.Ne4 Ne4 17.Qe4 Qd5 (17...a6 18.a5 Nd7 19.Bd4=) 18.Qg4 f6 19.Rfd1 Qc4 20.Nd4+/– f5 21.Qf3 Rab8 22.a5 Na4?? 23.Rdc1+– Qb4 24.Ne6 Qb2–/+ 25.Nf8 Rf8 26.Qb7 Nc3 27.Kh1 Qb5 28.Qa7 Ne4 29.Rcb1? Qe5 30.f4–/+ Qc3 31.a6? Bc5 32.Qb7 Qe3 33.a7?? Qg1! 34.Rg1 Nf2# 0–1. Verns – Andreg (1675), internet, 2007.

5.cd3 e6

6.a3 a5 7.b5 c5 8.d4 cd4 9.Bd4 Nbd7 10.f4 Bc5 11.Nf3 0–0 12.Nc3 Bd4 13.Nd4 Ne4 14.0–0 (14.Ne4 de4 15.Qc2 Nf6=) 14...Nc3+= 15.dc3 Rc8 16.Rc1 Nf6 17.Rf2 (17.Nf3 Qd6 18.Qb3 Qb6–/+) 17...Rc4 18.Rfc2 Qb6 19.Qd3 Rd8 20.h3 Ne4 21.Kh2 Rdc8 22.Kg1 Qc5 23.f5 e5 24.Ne2 Qb5 25.Rd1 R8c5 0–1. Etmans,Maarten D (2010) – Tanis,C. Kees (2305), Dutch CC Championship KE09, 2006.

6.a3 Nbd7 7.g4 Nb6 8.a4? (8.g5 Nfd7=+) 8...d4 (8...Bb4 9.g5 Nfd7=+) 9.a5 Nbd5 10.Qa4 Qd7 (10...c6 11.b5 Nb4 12.Bd4–+) 11.g5 (better is 11.Bd4!? Nb4 12.Bf6 gf6 13.Qd7 Kd7 14.Ke2=+) 11...Nb4–+ 12.Ke2 Ng4 13.Bd4 e5 (13...c6!?–+) 14.Qd7–/+ Kd7 15.Bc3 Nd3 16.Kd3? (better is 16.Nh3 e4 17.f3=) 16...Nf2–+ 17.Ke2 Nh1 18.Be5 h6 19.g6 fg6 (19...f6 20.Bf4 Bd6 21.Bd6 Kd6=) 20.Nf3–/+ g5 21.Nc3 g4 22.Nd4? (better is 22.Nh4 Bb4 23.Rh1 Ba5 24.Bg7=) 22...Re8–+ (23.Bc7 Kc7 24.Rh1 Re5–+) 0–1. Wall,Bill – Rylander,Jim, corr, 1988.

6.Nf3 Bb4 7.0–0 (7.Qb3!? a5 8.a3+=) 7...Nbd7–/+ 8.a3 Bd6 9.Nc3 0–0 10.Re1 c5 11.Qb3 (11.e4 Bf4–/+) 11...Ne5 (11...a6 12.a4–+) 12.Ne5–/+ Be5 13.Rab1 b6 14.Nb5 (14.Rec1 d4 15.Ne2 Ng4–/+) 14...Bb2–+ 15.Qb2 a6 16.Nc3 b5 17.Ne2 Qd6 18.Rbc1 Ng4 19.g3? (better is 19.f4–+) 19...Ne5 20.Qc3 (20.d4 cd4 21.Nd4 Nd3–+) 20...Nf3 21.Kg2 Ne1 22.Re1 a5 23.Rc1 Rfc8 24.Nf4 b4 25.ab4 ab4 26.Qb2 c4 (26...e5 27.Nh3–+) 27.dc4 dc4 28.d4 (28.e4 Rab8–+) 28...cd3 29.Rc8 (29.Rd1 Qc6 30.Kh3 Qc2–+) 29...Rc8 30.Nh5 Qd5 (30...Qd5 31.e4 Qh5 32.Qb4 Qe2–+) 0–1. Neumann,Frank – Stock,Thomas, corr W–ch H GT19, 1991.

4.d4 e6

5.a3 a5 6.b5 c5 7.c4 cd4 8.Bd4 Nbd7 9.Bd3 (9.Nf3 Rc8 10.Nbd2 Nb6=) 9...Bg4 (9...Bd3 10.Qd3 dc4 11.Qc4–/+) 10.Be2 (10.f3!? dc4 11.Bc4=) 10...Be2–/+ 11.Qe2 dc4 12.Nd2 e5 13.Bc3 (13.Bb2 Nc5 14.Nc4 Nd3 15.Kf1 e4+=) 13...Nc5–/+ 14.Qc4? (better is 14.Nc4 Nd3 15.Kf1 Nf2 16.Qf2 Qd3 17.Ne2 Qc4 18.Be5–/+) 14...Rc8–+ 15.Ke2 Nce4 16.Ba5 Qd2! (16...Rc4?! 17.Bd8 Rc2 18.Ba5=) 17.Bd2 Rc4 18.Nf3 Nd2 19.Nd2 Rc3 20.a4 (20.Rhc1 Nd5–+ (20...Ra3? 21.Ra3 Ba3 22.Rc8 Kd7 23.Rh8+–)) 20...Bb4 21.Rhb1 Ba5 (21...Nd5!? 22.Ne4–+) 22.Nb3 Bb4 23.a5?? (23.Nd2 Nd5 24.Ne4–+) 23...Ke7 24.a6 ba6 25.ba6 Rc2 26.Kf1 Rhc8 27.a7 Ng4?? (better is 27...Ra8–+) 28.a8Q Rf2 29.Kg1 Rcc2?? 30.Ra7 Kf6 31.Rf1 Rf1 32.Kf1 Ne3 33.Kg1 Nf5 34.Ra2 Rc3 35.Qa6 Kg5 36.Qa4 (36.Qa4 Bd6 37.Rd2+–) 1–0. Fournier,Frederic (2215) – Maupoint,Sebastien, Ch Club, 2001.

5.a3 b6 6.Bb5 c6 7.Bd3 Bd3 8.Qd3 c5 9.bc5 bc5 10.c4 dc4 11.Qc4 Nbd7 12.Nf3 Qb6 13.Bc3 Rc8 14.0–0 Be7 15.Nbd2 0–0 16.Rfb1 Qc6 17.dc5 Bc5 18.Bb4 Nb6 19.Qc5 Qc5 20.Bc5 Rc5 21.Rc1 Rfc8 22.Nb3 Rc3 23.Rc3 Rc3 24.Nfd2 Kf8 25.Kf1 Ke7 26.Ke2 h6 ½–½. bobby fissure – Snicks, ChessWorld.net, 2012.

5.b5 a6 6.a4 (6.Ba3 Ba3 7.Na3 c6–/+) 6...Nbd7 (6...ab5 7.Bb5 c6 8.Be2–/+) 7.Nd2 (7.Ba3 Ba3 8.Ra3 0–0=+) 7...ab5–/+ 8.ab5 Ra1 9.Ba1 Bd6 10.c4 Bb4 (10...dc4 11.Ngf3–/+) 11.Ngf3=+ Ne4 (11...0–0 12.Qb3 Qe7 13.Bc3 Bc3 14.Qc3=) 12.Qa4 (12.Qb3 Bd2 13.Nd2 Nd2 14.Kd2 dc4 15.Bc4 Nc5=) 12...Bd2 13.Nd2 Nd2 14.Kd2 0–0 (14...Nb6 15.Qa7 Nc4 16.Bc4 dc4 17.Qb7 0–0=) 15.Bd3? (better is 15.Ke1=+) 15...Bd3 16.Kd3 dc4 (16...Nb6 17.Qb4 Nc4 18.e4–+) 17.Qc4?? Ne5 (18.Kc3 Nc4 19.Kc4 Qd5 20.Kb4 Qg2–+) 0–1. Luettig,Hendrik – Tornier,Siegfried, Pinneberg Winter–A, 1997.

5.b5 Bb4 6.Bc3 Bd6 7.Nf3 –/+.

5.b5 c5 6.a4 (6.dc5 Bc5 7.Nf3 Nbd7+=) 6...Nbd7 7.Nf3 Rc8 8.Nbd2 Bd6 9.h3 (9.a5 Bg6 10.c4 0–0=) 9...Qc7 (9...0–0 10.c4–/+) 10.Be2 (10.c4!?+=) 10...cd4–/+ 11.Nd4 Bc2 Black gets strong play along the open c–file 12.Nc2 Qc2 13.Qc2 Rc2 14.Bf6 Nf6 With the idea Bb4 15.Bd3 Rc3 16.Ke2 0–0 17.Rhc1 Rfc8 18.Rc3 Rc3 19.Ra2 g6 20.e4 Kg7 21.g3 e5 (21...Nd7 22.Nb1 Rc1 23.ed5 ed5 24.Nd2–/+) 22.ed5 Nd5 23.Ne4 (23.Be4 Rc5 24.Bd5 Rd5–/+) 23...Be7 (23...Bb4 24.Ra1 Rc8 25.f3–+) 24.Rc2 (24.Rd2!? Ra3 25.Bb1–/+) 24...Ra3–+ 25.Rc4 f5 26.Nc5 b6 27.Ne6 Kf7 28.Nc7 Nc7 29.Rc7–/+ Ra4 30.Bc4 Kf8 31.Rc8 Kg7 32.Rc7 Kh6 33.Re7 Rc4–/+ 34.Re5 Rc7 35.f4+= Kg7 36.Kd3 Kf6 37.Kd4 Rd7 38.Rd5 Re7 39.Re5?? Re5–+ 40.fe5 Ke6 41.g4 h6 42.gf5 gf5 43.h4 h5 44.Ke3 Ke5 45.Kf3 f4 46.Kf2 Ke4 47.Ke2 f3 48.Kf2 Kf4 (48...Kf4 49.Kf1 Ke3–+) 0–1. Ruhle,Ernst Albrecht – Hauser,Robert, Pizol op, 1998.

5.b5 c6 6.a4 Bd6 7.Nf3 a6 8.c4 Bb1 9.Qb1 Bb4 10.Nd2 (better is 10.Kd1+=) 10...Ne4–+ 11.Bc1 Qa5 (11...Bd2 12.Bd2 Qf6–+ (12...Nd2?! 13.Kd2 dc4 14.Bc4=)) 12.Qc2–/+ Nd7 (12...ab5 13.cb5 0–0 14.Bd3 cb5 15.Be4 de4 16.0–0 ba4 17.Ne4–/+) 13.Bd3 (13.bc6!? bc6 14.Bd3=) 13...Nd2 14.Bd2 dc4 15.bc6 cd3 16.cd7 Kd7 17.Qd3 Rac8 18.Ke2 (18.Rb1 Bd2 19.Qd2 Qd2 20.Kd2 Rc7+=) 18...Rc7 19.Bb4 Qb4 20.Rhb1 Qd6 21.g3 Rhc8 (21...Qd5 22.Kf1=) 22.Rb2 (22.Qh7!? Rc2 23.Kf1+=) 22...f5= 23.Rab1 Qd5 24.f3 g5 25.e4 fe4 26.fe4 Qc6 27.a5 Qa4 28.Rb7 Qa5 29.e5 (29.Qf3!? Qa2 30.Ke1+/–) 29...Kd8= 30.Rc7 Qc7 31.Rb2 Qc6 32.Qh7?? (better is 32.Kf2 g4 33.Qd2=) 32...Qg2–+ 33.Kd3 Qb2 (33...Qf3 34.Kd2 Qc3 35.Ke2 Qb2 36.Kf3 Qd4 37.Qg8 Kc7 38.Qh7 Kb6 39.Qb1 Ka5 40.Qe1 Ka4–+) 34.Qg8 Kc7 35.Qe6 Qb1 (35...Qb1 36.Ke3 Kb7 37.Qe7 Rc7–+) 0–1. Lisboa Lima – Da Silveira (2145), Barbosa Coitinho Memorial 1st, 1999.

5.a3 Bd6

6.c4 0–0 7.Nf3 =+.

6.c4 dc4 7.Bc4 0–0 8.Nf3 c6 9.0–0 Nbd7 (9...b5 10.Bd3=+) 10.Re1 (10.Nc3 Nd5=) 10...Qc7 (10...a5 11.b5=+) 11.Nc3 Ne4 (11...e5 12.e4 Bg4 13.d5=) 12.Rc1 (12.Bd3 Nc3 13.Bc3 Bd3 14.Qd3 Rad8=) 12...Ndf6 (12...Nc3 13.Bc3 Be4 14.h3=) 13.Bd3 Nc3 14.Bc3 Bd3 (14...Be4 15.Be4 Ne4 16.Qc2 Nc3 17.Qc3=) 15.Qd3 Rad8 16.e4 Bf4 (16...Ng4 17.e5 Be7 18.Bd2+/–) 17.Rc2 (17.Bd2 a6+=) 17...Qb6 (17...Ng4 18.g3 Ne5 19.Qe2 Nf3 20.Qf3=) 18.Qc4 (18.Bd2 Bd2 19.Rd2 a5+=) 18...Rfe8 19.g3 Bb8 20.Bb2 a6 (20...Rd7 21.Ne5 Rdd8 22.f4=) ½–½. Wilk,Adam (2015) – Waglorz,Janusz (2155), Poland–chT disctrict, 1996.

6.c4 dc4 7.Bc4 0–0 8.Nf3 c6 9.Nc3 Nbd7 10.0–0 Nb6 ½–½. Cernik,Lukas (1895) – Steiner,Peter (2030), Klatovy op–A, 1998.

6.Nd2 Nbd7 7.c4 c6 8.Be2 Ne4 9.Ngf3 Nd2 10.Nd2 Qg5 11.Bf3 (11.g4 Bg6+=) 11...Bc7 12.Rc1 Qd8 13.e4 de4 14.Be4 Be4 15.Ne4 Nf6 16.Qf3 Ne4 17.Qe4 0–0 18.0–0 Qg5 19.d5 (better is 19.f4!? Qh4 20.Rc3+=) 19...ed5–/+ 20.cd5 Rfe8 (better is 20...cd5!? 21.Qf3 Qf4 22.Qf4 Bf4=) 21.Qf3= Qh6 (21...Qf4!? 22.Qg3 g6=) 22.g3+/– Bb6 23.dc6 bc6 24.Rc6 Qd2 25.Bc1 Qa2 26.Rc3 Rad8 27.Be3 Qe6 28.Rc6 (better is 28.Rfc1!?+/–) 28...Qb3= 29.Kg2 Be3 30.fe3 Re3 31.Qf2 (31.Qd1 Qd3= (31...Rd1?? 32.Rc8 Rd8 33.Rd8 Re8 34.Re8)) 31...Qd5 32.Kg1 Ra3 (32...Qc6?? 33.Qf7 Kh8 34.Qf8 Rf8 35.Rf8) 33.Rc7 Rf8 34.Ra7 Rb3 35.Qc5 1–0. Seslavin,Maxim (1960) – Marjina,Arina, Novokuznetsk RUS, Summer Open, 2013.

6.Nf3 0–0 7.c4 dc4 (8.Bc4 a5=). MiserableBoris – shirehorse, ChessWorld.net, 2005.

6.f4 Nbd7 7.Nd2 Ng4 8.Qf3 Qe7 9.c4 Bb4 10.ab4+/– Qb4 11.0–0–0?? Qa4 12.e4 de4 13.Ne4 Be4 14.Qe4 Nf2 15.Qf3 Nd1 16.Qd1+= Qd1 17.Kd1 0–0 18.Be2 Nb6 19.Kc2 c5 20.dc5 Na4 21.Ba3 Rac8 22.Nf3 Nc5 23.Rb1 b6 24.Ne5 f6 25.Nf3 Kf7 26.Nd4 Rc7 27.Bf3 Rd8 28.Nb5 Rcd7 29.Rd1 Rd1 30.Bd1 Rd7 31.Bf3 a6 32.Nc3 Rd4 33.Bc5 bc5 34.f5 Rc4 35.fe6 Ke7 36.Bd5 Rd4 37.Kb3 a5 38.Bc4 g5 39.Na4 Kd6 40.Nc3 Ke7 41.Na4 Rd2 42.Nb6 Rd8 43.Ka4 Rd4 44.Ka5 Rc4 45.Nc4 Ke6 1–0. Botha,Gerry J – Breytenbach,Jan, ch–Commonwealth RSA–Open, 2011.

5.a3 Nbd7

6.c4 c6 7.Nc3 Be7 8.Nge2 0–0 9.Ng3 Bg6 10.Bd3 Qc7 (10...Bd3 11.Qd3 dc4 12.Qc4=) 11.Rc1 Rad8 (11...Bd3 12.Qd3 Nb6 13.c5=+) 12.cd5= ed5 (12...cd5? 13.Nd5 Qd6 14.Ne7 Qe7 15.Bg6 fg6 16.Qa4+–; < 12...Nd5 13.Bg6 fg6 14.Qg4+=) 13.Nf5 Rfe8 (13...Bf5 14.Bf5 Bd6 15.Nb5+=) 14.g4 (14.Qf3!?=) 14...Nb6=+ 15.h4 Bf8 (15...Nc4 16.Bc4 dc4 17.Qf3=+) 16.h5 (16.Qf3 Nc4 17.Bc4 dc4=) 16...Bf5 17.gf5 Qf4 18.Qe2 Qg4 (18...Qh6 19.b5=) 19.f3 (better is 19.Qg4!? Ng4 20.b5+=) 19...Qg5=+ 20.Kf2 (better is 20.Nd1=+) 20...Nh5?? (better is 20...Bd6 21.Rcg1 Qh6–/+) 21.Rcg1+/– Qh6 22.f4 Nf4 23.Rh6 Ne2 24.Ne2 g6 25.Rh3 Rd6 26.Nf4 Bg7 27.Rgh1 h6 28.fg6 fg6 29.Bg6 Rf8 30.Bd3 Nc8 31.Rg1 Ne7 32.Rhg3 Rf7 33.Ke2 Kh8 34.Nh5 Bf8 35.Nf4 Rdf6?? 36.Bg6 Rg7 37.Bc2 Rgf7 38.Ng6 Ng6 39.Rg6 Bg7 40.Rf6 Rf6 41.Rf1 (41...Rf1 42.Kf1+–) 1–0. Guerrini,Donato – Manini,Eugenio, Lombardia op, 1991.

6.c4 Be7 7.c5 c6 8.Bd3 Bd3 9.Qd3 a6 10.Nc3 0–0 11.Nf3 Nh5 12.e4 (better is 12.0–0!?=) 12...Nf4–/+ 13.Qe3?? (better is 13.Qf1–/+) 13...Ng2–+ (14.Kd1 Ne3 15.fe3 Nf6–+) 0–1. Loulou – peb, HCL–E917 playchess.de, 2003.

6.Nd2 Bd6 7.c4 c6 (7...0–0 8.Ngf3=+) 8.Ngf3= Ne4 9.cd5 ed5 10.Ne4 Be4 11.Bd3 f5 12.0–0 0–0 13.Ne5 Qe7 14.Be2 f4 15.ef4 Rf4 16.g3 (16.f3!? Be5 17.de5=) 16...Rf6 (16...Ne5? 17.de5 (17.gf4 Ng6–/+) 17...Be5 18.Be5 Qe5 19.gf4 Qf4 20.Qb3+–) 17.f4 a6 18.Bd3 Rff8 19.Be4 de4 20.Nd7 (20.Qb3 Kh8=) 20...Qd7=+ 21.Re1 Rae8 22.Re3 Rf7 23.Qc2 Qf5 24.Rae1 Rfe7 25.Kg2 Qd5 26.h4 Bc7 27.Qc5 Bd6 28.Qc3 Re6 29.Kf2 Rf8 30.Ke2 Rd8 31.Rc1 Qh5 32.Kd2 Be7 33.Qb3 Rd5 34.Rce1 Qf5 35.Qc2= Bf6 36.Qc4?? Kf8 37.Kc1=+ Rd8 38.Kb1 Qd5=+ 39.Qd5 cd5 40.Rc1 Red6 41.Ka2 R6d7 42.Kb3 Ke7 43.a4 Ke6 44.b5 ab5 45.ab5 Ra8 46.Rc2 Rd6 47.Rc7 Rb6 48.Kb4 Be7–+ 49.Re7 Ke7 50.Rc3 Rd6 51.Ba3 Ke6 52.Rc7 e3?? 53.Rc3=+ e2 54.Re3 Kf5 55.Re2 Re6 56.g4= Kf6 57.Re6 Ke6 58.f5 Kd7 59.Kb3 Re8–+ 60.g5 Re4 61.f6 gf6 62.gf6 Ke6 63.Kb4 b6 64.Kc3 Re3 65.Kb4 Ra3 66.Ka3 Kf6 67.Kb3 Kf5 68.Kc3 Kg4 69.Kd3 Kh4 70.Ke3 Kg3 (71.Kd3 h5–+) 0–1. Lukovski,Lev (2095) – Raasch,Joerg, Koeln, 1998.

6.Bd3 Bd3 7.Qd3 a5 8.b5 +=.

6.Bd3 Bd3 7.Qd3 Be7 8.Nf3 Nb6 9.Nbd2 0–0 10.c4 dc4 11.Nc4 Nc4 12.Qc4 a6 13.0–0 c6 14.Rac1 Nd5 15.Qc2 Rc8 16.Qe2 Nf6 17.Rfd1 Qd5 18.Qc4 Qc4 19.Rc4 Ne4 20.Nd2 Nd6 21.Rcc1 Bg5 22.g3 h6 23.h4 Be7 24.Nc4 Nc4 25.Rc4 Rfd8 26.Rdc1 Rd5 27.Kg2 Kf8 28.f3 Ke8 29.e4 Rd7 30.f4 Rcd8 31.e5 Rd5+= 32.R4c2 Kd7 33.Kf3 Kc7 34.Ke4 Kb6 35.Rc4 Kb5 36.R1c2 Rc8 37.Rc1 b6 38.R1c2 a5 39.ba5 Ka5 40.Rc6+/– Rc6 41.Rc6 Rd7 42.Rc4 b5+= 43.Rc3 Ka4 Exerts pressure on the isolated pawn 44.h5 Rb7 Black prepares the advance b4 45.d5?? ed5?? 46.Kd5+/– b4 47.ab4 Rb4? 48.Rc4 Kb5 49.Rb4 Kb4? 50.e6 fe6 51.Ke6 Bf8 52.Kf7 Bc5 53.Bg7 Bf2 54.g4 Bg3 55.Bh6 Kc5 56.f5 Kd6 57.g5 Bf4 58.f6 Ke5 59.Kg6 Ke6 60.f7 Bd6 61.f8Q Bf8 62.Bf8 Ke5 63.h6 Ke4 If Black now would get h7 in, he might survive 64.h7 Kd4 65.h8Q Ke4 66.Qc3 Kf4 67.Qd4 Kg3 68.Bd6 Kf3 69.Qf4 Ke2 70.Bb4 Kd3 71.Qd2 Kc4 72.Ba5 (72.Ba5 Kc5 73.Qd3 Kc6 74.Qc4 Kb7 75.Qc7 Ka8 76.Qc6 Kb8 77.Bc7 Kc8 78.Be5 Kd8 79.Bf6 mate; 72.Bd6 Kb5 73.Qd5 Kb6 74.Bb8 Ka6 75.Qb3 Ka5 76.Bc7 Ka6 77.Qb6 mate) 1–0. Fournier,Frederic (1750) – aaa1951 (1615), ChessOK.com, 2012.

6.Bd3 Be7 7.Bf5= ef5 8.Qd3 g6 (8...a5 9.b5=) 9.Nf3 Ne4 (9...Nb6 10.Nbd2+=) 10.Nbd2 (10.Qb5 a5+/–) 10...0–0 11.0–0 Bd6 12.c4 Ndf6 13.cd5 Nd5 (13...Nd2!? 14.Nd2 Nd5+=) 14.Ne4+/– fe4 15.Qe4 Re8 16.Qd3 f5 17.Rac1 Re4 (17...c6 18.Ne5+/–) 18.Qc4 Kf8 19.g3 c6 20.Nd2 Rg4 21.h3 Rg5 22.Nf3 Rh5 23.Kg2 g5 (23...Qe7 24.b5 Nb6 25.Qb3 cb5 26.Qb5+/–) 24.Ne5 Qe7 25.b5 g4 (25...Be5 26.de5 Rh6 27.bc6 bc6 28.Bd4+/–) 26.h4 (better is 26.hg4!? fg4 27.bc6 Be5 28.Qd5 bc6+–) 26...Rc8 (26...Nb6 27.Qe2 cb5 28.f3 Be5 29.fg4 Bg3 30.gh5+– (30.Kg3?? Qh4 31.Kf4 Nd5 32.Kf3 Qg4 33.Kf2 Rh2 34.Ke1 Qe2)) 27.bc6 (27.Qa4 Rc7+–) 27...bc6+/– 28.Nc6 (28.Rfd1!?+/–) 28...Qe4+= 29.Kh2?? (better is 29.Kg1 Ne3 30.fe3 Qe3 31.Rf2 Bg3 32.Qb4 Ke8 33.Qd2 Qf2 34.Qf2 Bf2 35.Kf2 Rh4 36.Kg1+=) 29...Rh4 30.Kg1 Rh1 0–1. Fournier,Frederic (2025) – nunap (2080), Echecs21 (8/5), 2003.

5.b5 Be7

6.c4 0–0 7.Nf3 Nbd7 8.Be2 Re8 9.0–0 dc4 10.Bc4 Qc8 11.a4 Rd8 12.Nbd2 Nb6 13.Bb3 a6 14.Re1 ab5 15.ab5 Ra1 16.Ba1 Bb4 17.Re2 (better is 17.Qe2=+) 17...Nbd5?? (better is 17...Bd3–/+) 18.e4+/– Bd2 19.Qd2?? (better is 19.Nd2 Nf4 20.ef5 Ne2 21.Qe2 ef5 22.Nf3+/–) 19...Ne4 20.Qc2? (20.Qc1!?–/+) 20...Nf2! 21.Kf2?? (21.Rf2 Bc2) 21...b6 (better is 21...Bc2 22.Rc2 Qd7–+) 22.Qd2 Qd7 23.Bc4 Ra8 24.Bb2 Qc8 25.Ne5 Qd8 26.Nc6 Qf6 27.Kg1 Bg6 28.Rf2 Bf5?? (28...Qh4 29.Ne5+–) 29.Bd3 (better is 29.Bd5 Re8 30.Qe3+–) 29...Ra2 30.Bf5 Nf4?? (30...ef5 31.Re2 h6+–) 31.Bb1 Rb2 32.Qb2 (32.Rf4?! Rd2 33.Rf6 gf6=) 32...g6 33.Ne5 h5 (33...Qg5 34.Qa3 h6 35.h4 Qh4 36.Qa8 Kg7 37.Qe4+–) 34.Nd3 (better is 34.Qc2 h4+–) 34...Kg7 (34...Nd3 35.Bd3 Qd8+–) 35.Rf4 Qg5 36.d5 Kg8 37.de6 fe6 38.Rc4 Qd8 39.Qc3 e5 40.Rc7 h4 41.Rc8 Qc8 (41...Qf8 42.Ba2 Kh7 43.Rf8 Kg7 44.Rg8 Kh6 45.Qe5 h3 46.Rh8#) 1–0. Bonetti,Shane – MacChess 5.0, 2000.

6.c4 dc4 7.Bc4 Bb1 8.Rb1 Bb4 9.Kf1 Qe7 10.Nf3 0–0 11.g3 c6 12.Kg2 cb5 13.Bb5 a6 14.Be2 b5 15.Qb3 Nbd7 16.Rhc1 Rfc8 17.Ne1 Be1 18.Re1 Rc7 19.Ba3 Qd8 20.Bf3 Rac8 21.Bb4 Nb6 22.Ba5 Rb8 23.Rec1 Qc8 24.Rc7 Qc7 25.a4 Qd7? 26.ab5+– Nc8 27.b6 Nd5 28.Bd5 ed5 29.Qd3 Qb7 30.Qc3 h6 31.Qc5+/– Kh7 32.Kg1 Kg8 33.e4 de4+= 34.d5 Qd7? 35.Qc4 Qd6?? 36.Qc6 Kf8?? 37.Bb4 (37.Bb4 Qb4 38.Rb4+–) 1–0. Khannanov,Ruslan (1715) – Khatmullina,Dilara (1670), Ufa RUS, Gumerov Mem, 2012.

4.Be2 Nbd7

5.Nf3 a6 6.Nh4 Bg6 7.Ng6 hg6 8.Bf3 (8.0–0 e5 9.a3 Bd6=) 8...e5+= 9.a3 c5 10.bc5 Bc5 11.h3 e4 12.Be2 Nb6 13.d3 0–0 (13...Na4 14.Be5=) 14.Nd2 (14.Ra2 Rc8=) 14...Re8 (14...Na4 15.Qc1=) 15.Nb3 Na4 16.Nc5 Nc5 17.0–0 Na4 18.Bd4 b5 19.f3 Rc8 20.Qd2 Nh5 21.Rfc1 Ng3 22.Bd1 Nf5 23.de4 de4 24.c3 Nc5 25.Bc2 (better is 25.Rcb1!?+=) 25...ef3–/+ 26.gf3 Nh4 (26...Qg5!? 27.Qg2 Qg2 28.Kg2 Ne3 29.Kf2 Nc2 30.Rc2 g5–/+) 27.Qf2+= Qg5 28.Kf1 Ne6 29.f4 Qh6 30.Kg1 Nf5 31.Bf5 gf5 32.Qg3 Nc5 33.Ra2 Ne4 34.Qf3 a5 35.Rg2= g6 36.h4 Re6 37.Qh3 Kh7 38.h5+= Rg8 39.hg6 Reg6= Threatening mate: Qxh3 40.Qf5 Nd6–+ Do you see the mate threat? 41.Qd3 f5 42.Rcc2 Qh3 43.Qf1 Ne4 44.Rg6 Rg6 45.Rg2 Ng3 46.Qb5 Qh1 47.Kf2 Ne4 (47...Ne4 48.Ke2 Rg2 49.Kd3 Qf1#) 0–1. Andersson,Lars H – Svensson,B, corr, 1987.

5.Nf3 e5 6.Ne5 Bb4 7.Nd7 Bd7 8.c4 =.

5.Nf3 e6 6.a3 Be7 7.0–0 0–0 8.d3 c5 9.b5 a6 10.ba6 ba6 11.Nbd2 Qc7 12.Nh4 Bg6 13.Ng6 fg6 14.c4 Rab8 15.Qc2 Rb7 16.Rfb1 Rbb8 17.g3 Ne8 18.d4 Nd6 19.cd5 ed5 20.dc5 Qc5 21.Qc5 Nc5 22.Bd4 Nde4 23.Ne4 Ne4 24.Ba6 Rb1 25.Rb1 Nf2 26.Rb7 Bf6 27.Bc5 Ra8 28.Bb5 Ne4 29.Bb4 d4 30.ed4 Bd4 31.Kf1 Rd8 32.Be7 Rd5 33.Bc4 Nd2 34.Kg2 Nc4 35.Rb8 Kf7 36.Bb4 Ne3 37.Kf3 Nc2 38.Rf8 Ke6 39.Re8 Kd7 40.Re7 Kc6 41.Rg7 Bg7 0–1. Marinelli,P – Rostrom,R, Troy,MI, 1993.

5.f4 e6 6.a3 Bd6 7.Nf3 Qe7 8.c4 (8.Nd4 Be4=) 8...c5 9.b5 (9.bc5 Nc5 10.d4 Ncd7=) 9...e5 (9...dc4 10.Bc4 Nb6 11.Be2+=) 10.fe5 (10.Nh4 Bb1 11.Rb1 0–0=) 10...Ne5+= 11.Ne5 Be5 12.Be5 (12.d4 Bc7 13.dc5 Ne4 14.Qd5 Qh4 15.g3 Bg3 16.hg3 Qg3 (16...Qh1?! 17.Bf1 Qf3 18.Qe5 Kd8 19.Qf4 Qg3 20.Qg3 Ng3 21.Bg2–/+) 17.Kd1 Rd8–+) 12...Qe5–/+ 13.Nc3 (13.Ra2 dc4 14.0–0 Bd3–/+) 13...d4 14.Na4 (14.Nd5!? Nd5 15.cd5 de3 16.0–0–/+) 14...de3–+ 15.0–0 Rd8 16.Ra2 (better is 16.d3–+) 16...ed2 17.Rd2 (17.b6 ab6 18.Kh1–+) 17...Qe3 18.Rf2 (18.Kh1 Rd2 19.Qa1 Re2–+) 18...Rd2 19.Qe1 Ne4 0–1. mikebaldini (1680) – bukic (1940), gameknot.com, 2014.

5.f4 h6 6.Nf3 e6 7.a3 c6 8.0–0 Bd6 9.c4 0–0 (9...dc4 10.Bc4 a5 11.b5=) 10.c5+= Bc7 11.Qe1 e5 (better is 11...Bg4!?=) 12.Ne5 Re8 13.Nd7 Nd7 14.g4 Bh7 15.Rf2 Qh4 16.Nc3 f5 (16...Nf6!?+=) 17.Rg2+/– Qe7 18.g5 hg5 19.Rg5 Nf6 20.Qg3 Rad8 21.Na4 Qf8 22.Kf2?? (22.Bd3!? Qe7+–) 22...Re7?? (better is 22...Ne4 23.Kf3 Ng3 24.Bg7 Qf7 25.Kg3 Bg6–+) 23.Bh5?? (better is 23.d3+/–) 23...Ne4–+ 24.Kf3 Ng3 25.Rg3 Rdd7 (25...d4 26.Rb1–+) 26.Rag1 (26.Bd4 Kh8–+) 26...b6 (26...d4 27.Bd4 Rd4 28.ed4–+) 27.Bc3 (27.Bd4 b5 28.Nc3 a6–+) 27...Qd8 28.Nb2 (28.Bd4 b5 29.Nc3 a6–+) 28...bc5 (28...d4 29.ed4 Rd4 30.Kg2 Bf4 31.Bd4 Bg3 32.Bc3–+) 29.bc5 (29.Bf6 Re3! 30.de3 Qf6–+) 29...Ba5 (better is 29...d4 30.ed4 Rd4 31.Kg2 Bf4 32.Bd4 Bg3 33.Bc3–+) 30.Bd4 Bd2 31.Nd3 Qf8 32.Ne5 Rc7 33.Bg6 Bg6 (33...Qc8 34.Rh3 Bg6 35.Ng6=) 34.Ng6 Qb8 (better is 34...Qe8 35.Ne7 Re7–+ (35...Qe7?! 36.Ke2 Ba5 37.Bg7 Qg7 38.Kd3–+)) 35.Rh3 Qb3 The pressure on the backward pawn e3 grows 36.Rh8 Kf7 37.Ne7?? (better is 37.Rf8 Ke6 38.Rd8=) 37...Re7–+ 38.Rg7 Ke6 39.Rh6 Kd7 40.Re7? (40.Rd6 Ke8 41.Rg8 Kf7 42.Rg7 Kf8 43.Rd8 Re8 44.Re8 Ke8 45.Rg8 Kf7 46.Rg7 Kf8 47.Ra7 Qd1 48.Kg2–+) 40...Ke7 41.Rc6 (41.Kf2 Qa3 42.h4 Bc3 43.Rh7 Ke8 44.Bc3 Qc3 45.Ra7 Qc5–+) 41...a5 (better is 41...Qb5 42.Rc7 Kd8–+) 42.Rf6 (42.Kf2–+) 42...Qd3 (better is 42...Qd1 43.Kg2 Be1 44.e4 Qd4 45.Rf7 Kf7 46.Kh1 Qf2 47.h3 Bd2 48.ed5 Qf1 49.Kh2 Bf4) 43.c6 (43.Rf5 Qf5 44.c6 Qc2–+) 43...Qe4 (43...Qf1 44.Kg3 Be1) 44.Kf2–+ Qc2 (better is 44...Be3 45.Be3 Qc2 46.Ke1 Kf6–+) 45.Kf3 (45.Rh6 Bc3 46.Kf1 Qd1 47.Kg2 Qg4 48.Kh1 Bd4 49.ed4 Qf4 50.Rg6–+) 45...Be1 46.e4 (46.Rf5 Qd1 47.Kg2 Qe2 48.Kg1 Qf2 49.Kh1 Qf1) 46...de4 (46...Qe4) 47.Ke3 Qd2 0–1. mikebaldini (1615) – chief_huerta, gameknot.com, 2015.

5.h3 e6 6.a3 Bd6 7.Nf3 c6 8.c4 (8.Nh4 Bg6=) 8...Rc8 (8...dc4 9.Bc4 b5 10.Bf1+=) 9.Qa4 (9.c5 Bc7=) 9...Bb8 (9...dc4 10.Qa7 b5 11.0–0+=) 10.Bd4 (10.d3 dc4 11.dc4 0–0=) 10...0–0 (10...dc4 11.Ba7 (11.Bc4? b5 12.Qa6 bc4–+) 11...Bd6 12.Bd4–/+) 11.Ba7 b5! 12.cb5? (12.Qa6 dc4 13.Bb8 Rb8 14.Nc3–/+ (14.Qc6?? Rb6 15.Nd4 Rc6 16.Nc6 Qc7 17.Ne7 Kh8 18.Nf5 ef5–+)) 12...cb5–+ 13.Qa6 Ba7 (13...Rc1!? 14.Bd1 Ba7 15.0–0–+) 14.Nc3 Ra8 15.Qb5 Rb8 (15...Qc7!? 16.Rc1–+) 16.Qa4 Rb7 17.Nb5 Bb8 18.Nfd4 Be4 19.0–0 Ne5 20.f4 Nc4 21.d3 (better is 21.Rfc1–/+) 21...Nb6?? (21...Ne3!? 22.de4 Nf1 23.Rf1 Ne4 24.Bd3–+) 22.Qb3?? (better is 22.Qa6 Qd7 23.de4 Bf4 24.ef4+=) 22...Bg6–/+ 23.Nc6 Qd7 (23...Qe8 24.Rac1–/+) 24.Nbd4 (24.Na5!?+=) 24...Rc8–/+ 25.Rfc1 Rbc7 26.Rc5? (26.b5 Na8+=) 26...Nh5?? (26...Rc6 27.Nc6 Rc6 28.d4–+) 27.Kf2? (27.Rac1 Ba7+=) 27...f5?? (better is 27...Rc6 28.Nc6 Rc6–+) 28.Rac1 (28.Nb8 Rb8 29.Ne6 Ra7=) 28...Rb7+= 29.R1c2 (29.Bh5 Bh5 30.Ne7 Qe7 31.Rc8 Nc8 32.Rc8 Kf7=) 29...Be8 30.Ne5 (better is 30.Bh5 Bh5 31.Ne7 Qe7 32.Rc8 Nc8 33.Rc8 Kf7 34.Nc6=) 30...Qd8?? (better is 30...Be5 31.fe5 Ra8–/+) 31.Rc8+= Nc8 32.Nec6?? (better is 32.Bh5 Be5 33.fe5 Bh5 34.Ne6+–) 32...Qh4–/+ 33.Kg1?? (better is 33.Kf1 Ng3 34.Kg1 Ne2 35.Re2 Bc6 36.Nc6–/+) 33...Qe1–+ 34.Kh2 Nf4 (better is 34...Qg3 35.Kh1 Nf4–+) 35.Nb8+/– Rb8 (better is 35...Ne2!? 36.Re2 Qa1+/–) 36.ef4+– Bf7 37.Bf3 (better is 37.Qc3!? Qc3 38.Rc3+–) 37...Qe3+/– 38.Ne2 Ne7 39.b5 (better is 39.Rc7 Ng6 40.Qc3+–) 39...Ng6+= 40.a4 (40.Qc3 Nh4 (40...Nf4? 41.Qc7 Rf8 42.Nf4+–) 41.Kg3 Nf3 42.gf3 Qb6+/–) 40...Nf4 (40...Nh4!? 41.Kg3 Nf3 42.gf3 Bh5=) 41.Nf4= Qf4 42.Kh1 Qd4 43.Ra2 Be8 44.Qa3 Qa7 (44...Bf7 45.Rb2=) 45.Bd1 Qa5 (45...Ra8 46.Qb2+=) 46.Bc2 (better is 46.Qd6!? Rd8 47.Qe6 Bf7 48.Qe2+/–) 46...Ra8= 47.Qd6 (47.Qe7!? Qe1 48.Kh2 Qe5 49.Kh1 Bb5 50.ab5 Qe1 51.Kh2 Qe5 52.Kh1 Qe1 53.Kh2 Qe5 54.Kh1=) 47...Qe1+= 48.Kh2 Bb5 49.Bb3 Bd3 50.Bd5 Attacks the pawn on e6 50...Re8 (better is 50...Ra6 51.Be6 Qe6 52.Qd3 Rd6=) 51.Be6?? (51.Bc6 Bc4 52.Rc2+–) 51...Qe6–+ 52.Qe6 Re6 53.Kg3 g5 54.Rd2 Ba6 (54...Be4 55.a5–+) 55.Rd5 Rf6 56.h4 h6 57.hg5 hg5 58.Kh3 Kg7 59.g4 Bf1 60.Kg3 Bc4 61.Rc5 Be6 62.gf5 Rf5 63.Rc7 (63.Rf5 Bf5 64.a5 Bd3–+) 63...Kg6 64.Ra7 g4! 65.a5 (65.Kg4 Ra5 Double attack) 65...Kg5 (better is 65...Rf3 66.Kg2 Bd5–+) 66.Rg7–/+ Kh6 67.Rg4 Ra5 68.Rf4 Kg5 69.Rb4 Ra3 70.Kf2 Bg4 71.Rb2 Rf3 72.Kg2 Kh4 73.Rb4 Re3 74.Rb2 Rg3 75.Kh2 Rh3 76.Kg1 Kg3 77.Rg2 Kf4 78.Rf2 Bf3 79.Rh2 Rg3 80.Kf1 Ke3 81.Rb2 Be4 82.Re2 Kd4 83.Rh2 Rb3 84.Rh4?? (better is 84.Rd2 Ke3 85.Re2 Kf3 86.Rf2 Kg3 87.Rf8–+) 84...Ke3–+ 85.Rh3 (85.Kg1 Rb1 86.Kh2–+) 85...Bf3 86.Kg1 Rb2 (86...Rb1 87.Kh2 Kf2 88.Rf3 Kf3 89.Kh3 Rh1) 87.Rh8 (87.Rh1 Rb1 88.Kh2 Rh1 89.Kg3 Rg1 90.Kh4 Kf4 91.Kh3 Rh1) 87...Rb1 88.Kh2 Kf2 89.Kh3 Rh1 0–1. mikebaldini (1710) – javadgh (1750), gameknot.com, 2016.

5.h4 e5 6.g4 Be6 +=.

5.h4 e6 6.g4+/– Bc2 (better is 6...Bg4!? 7.Bg4 Bb4+/–) 7.Qc2+– Bb4 8.g5 Ne4 9.Bg7 Rg8 10.Bh6 c6 (10...Bd6 11.Nc3 Ndc5 12.d4 Nc3 13.dc5+– (13.Qc3?! Ne4 14.Qb3 Rb8+–)) 11.Bd3 (11.f3 Ng3 12.Qh7 Ke7+–) 11...Qa5 (11...f5 12.Be2+–) 12.Be4 (12.f3 Ng3 13.Rh3 Nh5 14.Bh7 Rh8+–) 12...de4 13.Qe4 0–0–0 14.Nf3 (14.Qh7 Qe5 15.Nc3 Bc3+=) 14...Nc5 15.Qc2 (15.Qh7 Nb3 16.ab3 Qa1+–) 15...f5? (15...Nd3!? 16.Ke2 Qf5+/–) 16.a3 (better is 16.Qc4+–) 16...Ne4? (16...Nd3 17.Kf1 Qa6 18.Kg2+– (18.ab4?! Qa1 19.b5 c5+/–)) 17.0–0 (better is 17.Qa2!? Bd6 18.Qe6 Kb8+–) 17...Bd6 18.Nd4 e5 (18...Rg6 19.Rc1 Qe5+–) 19.Nf5 (19.Nf5 Qd5 20.f3+–) 1–0. mikebaldini (1640) – metalac (1620), gameknot.com, 2014.

4.Be2 e6

5.a3 a5 6.b5= a4 (6...Bd6 7.Nf3=) 7.d3 (7.Nf3 Bd6=) 7...Nbd7 (7...Ra5 8.Nc3=) 8.Nf3 Bd6 9.Nh4 0–0 10.Nf5 ef5 11.0–0 f4 12.ef4 Bf4 13.Nd2 Ra5 (13...Re8 14.Re1=) 14.d4 (14.c4 Re8=) 14...Nb6 15.Bc3 (15.Re1 Re8=) 15...Ra8 16.Bd3 Re8 17.Re1 (17.Qf3 Bd6=) 17...Qd7 (17...Re1 18.Qe1 Qd7 19.Nf3=) 18.Qf3 Bd6 19.Bb2 Re7 (19...Re1 20.Re1 Re8 21.Re2=) 20.Re7 (20.c4 Rae8 21.Re7 Be7+/–) 20...Qe7 21.Qe2 Qd7 22.Nf3 Re8 23.Ne5 Qe7 24.Qf3 Ne4 25.Qd1 Nc4 26.Nc4= Bh2 27.Kh2 Qh4 28.Kg1 Qf2 29.Kh1 Re6 30.Bc1 Qd4 31.Be3+= Ng3 32.Kh2?? Qh4–+ 33.Kg1 dc4 34.Bc4 Re3 35.Bf7?? Kf7–+ 36.Qd5 0–1. Olsen,Birger – Fedin,Viktor (1815), Kalotturneringen, 2001.

5.a3 Be7 6.d3 h6 7.Nd2 Nbd7 8.Ngf3 0–0 9.h3 Bg6 (9...a5 10.b5+=) 10.Nb3= Bd6 11.g4 (11.0–0 c6=) 11...e5 12.Nh4 Bh7 13.Nf5 (13.0–0 Qe8+=) 13...Bf5–/+ 14.gf5 Re8 (14...Nb6 15.c4 Na4 16.Qc2 Nb2 17.Qb2–/+) 15.Rg1 c5 16.bc5 Nc5 17.Nc5 Bc5 18.Bf1 (18.c4 Qb6 19.Qc2 dc4 20.dc4 Rad8+=) 18...Rc8–/+ 19.Qd2 (19.Rb1 Qd7–/+) 19...Bb6–+ 20.Kd1 Ba5 21.c3 (21.Qe2 d4–+) 21...Kh8 22.f3?? (22.Bg2–+) 22...d4! 23.Qg2 (23.cd4 Bd2 Pinning (23...Bd2 Deflection); 23.ed4 Nd5 Combination) 23...Rg8 24.cd4 (24.c4 Nd5 25.Qh2 (25.cd5 Qd5 26.Qc2 Rc2 27.Kc2 Rc8 28.Kb1 Qb3 29.h4 Rc2 30.Ra2 Rd2 31.Bh3 Bc3 32.ed4 Rb2 33.Rb2 Qb2) 25...Ne3 26.Kc1–+) 24...Nd5 25.Qf2 (25.Bc1 ed4 26.f4 de3 27.Bb2 e2 28.Ke2 Nf4 29.Kf3 Ng2 30.Rg2–+) 25...Qb6 26.Be2 Qb3 0–1. Short,Nigel D (2680) – Caruana,Fabiano (2780), London ENG, 5th Classic KO, 2013.

5.b5 Bb4 6.g4 Bg6 7.f4 (7.a3!? Ba5 8.h4+=) 7...h6 8.h3 (8.Nc3 Nbd7–/+) 8...Nbd7 9.Nf3 Be4 (9...0–0 10.Kf2–/+) 10.0–0+= 0–0 11.d3 Bh7 (11...Bg6 12.Nc3+=) 12.Nbd2 (12.Nc3 a6+=) 12...Bc5 13.d4 Bb6 (13...Be7 14.Bd3+=) 14.a4 (14.c4 c6=) 14...c6 15.c4 Ba5 16.Nb3 (16.Ba3 Re8=) 16...Bb4 17.c5 Ne4 18.Bd3 Ng3 (18...a6 19.Qc2+=) 19.Bh7 Kh7 20.Qd3 (20.a5 Kg8 21.Kg2 Nf1 22.Qf1 Qe7=) 20...Kh8 (20...f5 21.Rfb1 a5 22.Kg2+=) 21.Rfd1 (21.Rfb1 a5=) 21...Ne4 (21...a5 22.Ba3 Ne4 23.Bb4 ab4 24.a5=) 22.a5= f5?? (better is 22...cb5 23.Qb5 Bc3=) 23.Ra4+– Ndc5?? (better is 23...fg4 24.hg4 Ndf6 25.Rb4 Ng4+–) 24.dc5 (24.Nc5?! fg4 25.hg4 Bc5 26.dc5 Kg8+–) 24...Bc5 25.Nc5 Rg8 (25...Nc5 26.Qd4 Qf6+–) 26.Ne6 Qd7 (26...Qe8 27.gf5 Qh5 28.Ne5+–) 27.Ng7 (better is 27.gf5 Nd6 28.Nh4+–) 27...Rg7 28.Bg7 (better is 28.bc6 bc6 29.Rb4 Rag8 30.Bg7 Rg7+–) 28...Kg7 (28...Qg7 29.Ne5 fg4 30.hg4 Nc5+–) 29.Qd4 Kf7 (29...Kh7 30.Ne5 Qg7 31.bc6 bc6+–) 30.Ne5 1–0. Silva,J Rossi Da (1740) – Colaco,W Wagner Soares, Championship Paranaense Absoluto de Xad, 2015.

5.b5 h6 6.a4 Be7 7.h4 (7.Nf3 0–0=) 7...Nbd7 8.g4 Be4 9.Rh3 e5 10.Nc3 Bd6 11.Ne4 (11.g5 Nh7=) 11...Ne4 12.Qb1 Qf6 Threatening mate... how? 13.f3 Nec5 14.Qa2 Qe6 Black plans e4 15.Rh2 (15.d4 ed4 16.ed4 Qe3+=) 15...Nf6 Black prepares the advance e4 16.Rg2 White intends g5 16...0–0–0 17.a5 e4 (17...g5 18.b6=) 18.f4 White prepares g5 18...Kb8 19.g5 hg5 20.hg5 Ne8 21.Bg4 Qe7 ½–½. Levin,Anatoly – Vatnikov,Josif E (2325), Bradley op Windsor Locks, 1998.

5.h4 Bd6!? –/+.

5.h4 h5 6.a3 Nbd7 7.Nf3 Ng4 8.Nc3 Nb6 9.Nd4 a6 (9...Bg6 10.Bg4 hg4 11.Qg4+=) 10.Nf5+= ef5 11.Bf3 Nc4 12.Bc1 Qd7 (better is 12...c6!?=) 13.Bd5+/– Nd6 14.Qe2 0–0–0 15.a4 Nf6 16.Bb3 Nde4 17.Ne4 fe4 18.Bb2 (better is 18.b5!? a5 19.0–0+/–) 18...Bb4= 19.0–0–0 Rhg8 (19...Qe7 20.Qc4 Rhf8 21.Bd4+=) 20.Bf6 gf6 21.g3 Rg4 22.c3 (22.d3!? Qc6 23.de4 Rd1 A) 24.Rd1? Qc3 25.Kb1 Ba3 26.Rd8 Kd8 27.Qd3 Qd3 28.cd3 Bb4–+; B) 24.Kd1? Qc3 (24...Qe4 25.Rf1+=) 25.Qd3 Qa1 26.Ke2 Qh1–+; C) 24.Qd1 Qe4 25.Qd5 (worse is 25.Bf7 Qe5 26.c4 Rg7–/+) 25...Qd5 26.Bd5+=) 22...Ba3= 23.Kb1 Kb8 24.Qc4 Qf5 25.Qf7 (25.Rhf1!?+=) 25...Qf2–/+ 26.Qh5?? (26.Ka2 Bc5 27.Kb1 Rd2 28.Ka1 Rg3 29.Rd2 Qd2 30.Qf6 Re3 31.Rd1–+) 26...Rd2–+ (26...Rg3?! 27.Rhf1 Qg2 28.Bc2+=; 26...Qg3?! 27.Qf5+=) 27.Rd2 Qd2 28.Bc2 Qc3 (28...Rg3?! 29.Qe8 Ka7 30.Qe4–+) 29.Qe8 (29.Qh8 Ka7 30.Qf6 Qf6 31.Be4 Qb2) 29...Ka7 0–1. mikebaldini (1660) – chesstragedy (1755), gameknot.com, 2016.

5.a3 c5

6.bc5 Bc5 7.Nf3 Nc6 8.0–0 Bd6 9.Nc3 (9.Nh4 Be4=) 9...0–0 (9...e5 10.Nb5=) 10.Nb5 (10.Nh4 Be4=) 10...e5 11.c4 (11.d4 e4 12.Nd6 Qd6=) 11...e4 12.Nh4 Bc8 13.Nd6 Qd6 14.cd5 Nd5 15.f3 Qe7 16.Qe1 f5 17.fe4 fe4 18.Rf8 Qf8 19.Qg3 Be6 20.Rf1 Qe7 21.Nf5 Bf5 22.Rf5 Rd8 (22...Qc7 23.Qc7 (< 23.Rd5 Qg3 24.hg3 Re8+–) 23...Nc7 24.Bc4 Kh8 25.Rf7+–) 23.Bc4 1–0. Vettenburg,L – Cravatte,M, corr BEL, 1997.

6.bc5 Bc5 7.g4 =+.

5.b5 a6

6.a4 ab5 (6...Bd6 7.Nf3 ab5 (7...0–0 8.0–0 ab5 9.ab5 Ra1 10.Ba1 Bg4 11.Ne5 Be2 12.Qe2 c5=; 7...Bg6 8.0–0 0–0 9.Nc3 Qe7 10.Nh4 e5 11.Ng6 fg6 12.e4 c6=; 7...Nbd7 8.ba6 ba6 9.Nh4 Be4 10.Nc3 0–0 11.Rb1 Ne8 12.Nf3 Nb6=; 7...Qe7 8.Nh4 Be4 9.d3 Bg6 10.0–0 Nbd7 11.f4 Bb4 12.Ng6 hg6=) 8.ab5 Ra1 9.Ba1 Bg4 10.Nc3 0–0 11.0–0 Nbd7 12.Nd4 Be2+=; 6...Bc5 7.Nf3 Bd6 (7...0–0 8.Nh4 Be4 9.d3 Bg6 10.0–0 Bd6 11.Nd2 Nbd7 12.c4 c5=; 7...ab5 8.ab5 Ra1 9.Ba1 Bg4 10.0–0 0–0 11.h3 Bf3 12.Bf3 Bd6=; 7...Qe7 8.0–0 0–0 9.Nh4 Be4 10.d3 Bg6 11.c4 dc4 12.Ng6 fg6=; 7...Nbd7 8.Nh4 Be4 9.f3 Bg6 10.0–0 Bh5 11.g4 g5 12.Ng2 Bg6=) 8.0–0 0–0 9.Nh4 Be4 10.d3 Nfd7 11.g3 Bg6 12.Ng6 fg6=) 7.ab5 Ra1 (7...Nbd7 8.Ra8 Qa8 9.Nf3 Qa2 10.Qc1 Qa5 11.Nh4 Bg4 12.f3 Bh5=) 8.Ba1 c5 (8...Bd6 9.Nf3 Bg4 10.Nc3 0–0 11.0–0 Nbd7 12.Nd4 Be2+=) 9.h4 (9.Nf3 Bg4= (9...Bd6 10.Nh4 Be4 11.d3 Bg6 12.c4 dc4=) 10.Nc3 Bd6 11.0–0 0–0 12.h3 Bf3=) 9...h6 10.Nh3 (10.Nf3 Nbd7 (10...Bd6+= 11.Be5 Be5 12.Ne5 0–0+=) 11.Nc3 Bd6 12.h5 0–0–/+) 10...Nbd7 (10...Bd6 11.g4 Be4 12.Bf3 e5+=) 11.g4 Bg6 (11...Bh7 12.Bb2 e5+=) 12.h5 (12.Nc3 Bd6+=) 12...Bh7 13.f4 (13.Bb2 Bd6+=) 13...Ne4–/+ 14.Nf2 Be7 (14...Ng3!? 15.Rh3 Ne2 16.Ke2 Qa5–/+) 15.Ne4+= (15.Bg7 Bh4 16.0–0 Bf2 17.Rf2 Rg8–+) 15...Be4 16.Bf3 (16.0–0 0–0+=) 16...Bf3–/+ 17.Qf3 Bf6 (17...0–0 18.Nc3+=) 18.Bf6 Nf6 19.0–0 (19.Nc3 d4 20.ed4 cd4=) 19...Qd7 (19...Qb6 20.c4+=) 20.Nc3 d4 21.Ne4 Ne4 22.Qe4 Qb5 23.Qe5 0–0–/+ 24.ed4 Rd8 25.g5 Rd5 26.Qb8+= Kh7 27.Qf8 hg5 28.Qf7= Qd7 29.Qg6 Kh8 30.fg5 Qe7 31.Kh1 Rg5+= 32.Rf8 Qf8 33.Qg5 cd4 34.Qg6 Qf6 35.Qe8 Kh7–+ 36.d3 Kh6 37.Kh2 Kg5 38.Qb5 Kg4 39.Qb7 Qf2 40.Kh1 Kh3 (40...Kh3 41.Qf3 Qf3 42.Kg1 Qg2#) 0–1. Larsen,Andreas – Jensen,Leif Haugaard (2055), Politiken Cup, Copenhagen DEN, 2004.

6.Nc3 A) 6...e5 7.Nf3 Nbd7 (7...Qe7 8.ba6 Na6 9.0–0 Nb4 10.d3 Ra5 11.Nb1 Nc6 12.Nbd2 Qe6=; 7...Bd6 8.0–0 0–0 9.ba6 Na6 10.Nb5 Nb4 11.d3 Re8 12.a3 Nc6+=) 8.ba6 ba6 9.0–0 Bd6 10.Rb1 0–0 11.d3 Rb8 12.a4 Bg4+=; B) 6...Be7 7.Nf3 (7.ba6 Na6 8.Nf3 Bg4 9.0–0 0–0 10.Ne5 Be2 11.Qe2 c6 12.f4 Qd6+=) 7...Qd6 (7...ab5 8.Nb5 Bg4 9.Be5 Na6 10.0–0 Bf3 11.Bf3 0–0 12.Rb1 c6=; 7...0–0 8.Nh4 Be4 9.d3 Bg6 10.ba6 Na6 11.Ng6 fg6 12.0–0 Nc5=) 8.0–0 e5 9.a4 Qe6 10.Nh4 0–0 11.f4 e4 12.ba6 Na6+=; C) 6...ab5 7.Nb5 Be4 (7...Be7 8.Nf3 Bg4 9.Be5 Na6 10.0–0 0–0 11.Rb1 Nd7 12.Bg3 Bf3=; 7...c6 8.Nd4 Be4 9.Ngf3 Nbd7 10.d3 Bf3 11.Nf3 Ba3 12.Ba3 Ra3+=; 7...Nbd7 8.Nf3 c6 9.Nbd4 Be4 10.d3 Bf3 11.Nf3 Ba3 12.Ba3 Ra3+=; 7...Bb4 8.Be5 Ba5 9.Nd4 Be4 10.f3 Bg6 11.f4 Ne4 12.Nb3 f6+=) 8.Nf3 Nbd7 9.0–0 c6 10.Nc3 Bf3 11.Bf3 Bd6 12.Be2 0–0+=.

6.Nf3 A) 6...Bd6 A1) 7.Nh4 Be4 (7...Bg6 8.Nc3 e5 9.ba6 Na6 10.Nb5 Nc5 11.Nf3 e4 12.Nd6 Qd6=) 8.d3 Bg6 9.Nc3 Qd7 10.a4 0–0 11.Ng6 fg6 12.0–0 e5=; A2) 7.0–0 ab5 8.Nd4 c6 9.Nf5 ef5 10.Bd3 g6 11.Qf3 Nbd7 12.Be2 0–0+=; A3) 7.Nc3 e5 (7...Bg4 8.0–0 0–0 9.a4 Re8 10.h3 Bh5 11.g4 Bg6 12.Nh4 e5+=; 7...0–0 8.Nh4 Be4 9.d3 Bg6 10.0–0 e5 11.ba6 Na6 12.Nb5 Nc5=) 8.ba6 ba6 9.0–0 0–0 10.Rb1 c5 11.d4 cd4 12.ed4 e4+=; A4) 7.ba6 Na6 8.Nh4 0–0 9.Nf5 ef5 10.0–0 Re8 11.c4 Qe7 12.cd5 Nd5=; B) 6...Bg4 B1) 7.Nc3 Bd6 (7...ab5 8.Nb5 Be7 9.Be5 Na6 10.0–0 Bf3 11.Bf3 0–0 12.Rb1 c6=; 7...Bb4 8.a4 0–0 9.0–0 Nbd7 10.h3 Bf3 11.Bf3 Nb6 12.Be2 ab5=; 7...Be7 8.a4 Bd6 9.h3 Bf3 10.Bf3 0–0 11.0–0 Nbd7 12.Be2 ab5=; 7...Bc5 8.a4 0–0 9.0–0 Qd6 10.Re1 Nbd7 11.ba6 ba6 12.Rb1 Rab8+=) 8.0–0 0–0 9.ba6 Na6 10.Nb5 Be7 11.a3 c6 12.Nbd4 Nc5+=; B2) 7.Ne5 Be2 8.Qe2 Be7 9.0–0 0–0 10.a4 ab5 11.ab5 Ra1 12.Ba1 Qd6=; B3) 7.a4 Nbd7 (7...Bd6 8.Nc3 0–0 9.0–0 Re8 10.h3 Bh5 11.g4 Bg6 12.Nh4 e5+=; 7...ab5 8.ab5 Ra1 9.Ba1 Bd6 10.0–0 Nbd7 11.h3 Bf3 12.Bf3 0–0=; 7...Be7 8.0–0 0–0 9.h3 Bf3 10.Bf3 ab5 11.ab5 Ra1 12.Ba1 Qd6=; 7...Bb4 8.0–0 0–0 9.Nc3 Bd6 10.h3 Bf3 11.Bf3 Nbd7 12.Be2 ab5=) 8.ba6 ba6 9.Nc3 Bd6 10.Rb1 0–0 11.h3 Bf3 12.Bf3 c5+=; B4) 7.ba6 Na6 8.Ne5 Be2 9.Qe2 Nb4 10.Qb5 Nd7 11.Nd7 Qd7 12.Qb7 Qd8=; C) 6...ab5 C1) 7.Nh4 c6 (7...b4 8.Nf5 ef5 9.0–0 Bd6 10.Bd3 f4 11.a3 fe3 12.fe3 Nbd7+=; 7...Ra5 8.Nf5 ef5 9.0–0 Bd6 10.Bd3 g6 11.a4 ba4 12.c4 dc4+=) 8.Nf5 ef5 9.0–0 b6 10.Bd3 g6 11.Qf3 Bg7 12.Be2 0–0–/+; C2) 7.Bb5 c6 (7...Nbd7 8.0–0 c6 9.Be2 Qb6 10.Bc3 Bd6 11.Nh4 Bg6 12.a4 Qc7+=) 8.Be2 Bd6 9.Nh4 Bg6 10.a4 Nbd7 11.Nc3 Ra5 12.0–0 e5+=.

5.h4 Bb4

6.g4= Be4 7.f3 Ng4 8.fe4 Nf6?? (better is 8...Ne3 9.Qc1 de4–/+) 9.ed5+/– Nd5 10.Bf3 (better is 10.c4!? Nf6 11.Qb3+–) 10...Ne3+/– 11.Qc1 Nd5 12.Bg7 Rg8 13.Qb2 Nc6 14.a3 Bd6 15.Qb7 Bg3 16.Kd1 Rg7 (16...Na5 17.Qb2 Rb8+=) 17.Qc6 Kf8 18.Nc3 Nc3 19.Qc3 Rb8 20.h5 Bf2 21.Ne2 f6 (21...c5 22.h6 Rg8 23.Rc1+–) 22.Rf1 Bh4 (22...Bb6 23.Rb1 Ke7 24.Bc6+–) 23.Nd4 Qd6 24.Be2 Rd7 (24...Bg5 25.Bc4 Re8 26.Re1+–) 25.Nf3 Bg3 (25...Qf4+–) 26.Qf6 Ke8 (26...Kg8 27.Bc4 Re8 28.Nd4+–) 27.Qh8 Ke7 (27...Qf8 28.Qf8 Kf8 29.Ne5 Ke8 30.Rf8 Kf8 31.Nd7 Ke7 32.Nb8+–) 28.Qh7 Ke8 29.Qg6 Ke7 30.Bd3 (better is 30.Qg7 Ke8 31.Qg8 Qf8 32.Qf8 Kf8 33.Ne5 Ke8 34.Rf8 Kf8 35.Nd7 Kg7 36.Nb8+–) 30...Rf8 31.Qg5 (31.Bb5!? Rdd8 32.Qg5 Rf6+–) 31...Rf6 32.Nh4 Bh4 33.Qh4 Qe5 34.Qf6 Qf6 35.Rf6 Kf6 36.Ke2 1–0. mikebaldini – oquliyev (1780), gameknot.com, 2015.

6.g4= Bg6 7.h5 Be4 8.f3 Bc2?? (better is 8...Ng4 9.fe4 Ne3+=) 9.Qc2+– Qe7? (9...Bf8 10.g5 Nfd7 11.f4+–) 10.Qb3 (10.a3 Bd6 11.g5 Nfd7 12.Bg7 Qg5 13.Bh8 Qg2 14.Qh7 Nf8+–) 10...c5? (10...0–0 11.h6 g5 12.Nh3+–) 11.Bb5 (better is 11.a3!? Ba5 12.g5 c4 13.gf6 gf6+–) 11...Nc6 (11...Kd8 12.a3 Ba5 13.g5+–) 12.Qa4 Qc7 13.f4 (13.a3 Ba5 14.h6 Rg8 15.hg7 Nd7+–) 13...Ne4? (better is 13...Ng4!? 14.h6 Ne3 15.hg7 Rg8+–) 14.Bg7 (14.h6 0–0 15.a3 Ba5 16.hg7 Rfd8 17.Bc6 Qb6+–) 14...Rg8 15.Be5 Qb6 16.g5 Rc8 17.Bd3 (better is 17.a3 Ba5 18.Ne2+–) 17...Ke7?? (better is 17...c4 18.Bd4 Nc5 19.Bh7 Na4 20.Bb6 Rg7+/–) 18.Be4+– de4 19.Bf6 Kf8 20.Nc3 (20.a3!? Ba5 21.Qe4 Qb3+–) 20...e5 (20...Bc3 21.Bc3 Nb4 22.Bb4 Qb4 23.Qd7+–) 21.Nd5 (better is 21.Ne4!? c4 22.Kd1 ef4+–) 21...Bd2 22.Kf2 (22.Kd2?! Qb2 23.Qc2 Qa1 24.Qc5 Ke8 25.Be5 Qa2 26.Ke1 Qa5 27.Qa5 Na5 28.Nf6 Ke7+–) 22...Qb2 23.Ne2 Rd8 (23...Ba5+–) 24.Rhb1 (better is 24.Bd8 ef4 25.Bf6 Be3 26.Ne3 Qb4 27.Qb4 fe3 (27...Nb4?? 28.Nf4 Nc6 29.Rab1+–) 28.Ke3 Nb4+– (28...cb4?? 29.Rac1 Rg5 30.Bg5+–)) 24...Be3 (24...Qa1 25.Ra1 Rd5 26.Qe4+–) 25.Ne3 Qd2 26.Rd1 Qb2 (26...Rd4 27.Rd2 Ra4 28.fe5 Rd4 29.Nd4 cd4+–) 27.Bd8 (27.Rd8 Nd8 28.Qd7 Qe2 29.Ke2 Nc6 30.Qc8 Nd8 31.Qd8) 27...ef4 (27...Nd4 28.Rd4! cd4 29.Nd1 e3 30.Kf1 Rg5 31.Nb2 Rh5 32.Qa7+–) 28.Nc4 (28.Nf5 e3 29.Kf3 Qe5 30.Be7 Qe7 31.Ne7 Ke7 32.Qf4 Ke8 33.Qe3 Kf8 34.Qc5 Kg7 35.h6 Kh8 36.Qc3 Ne5 37.Qe5 f6 38.Qf6 Rg7 39.Qg7) 28...Nd4 (28...Qb4 29.Qb4 Nb4 30.Nf4 Nc6+–) 29.Nb2 1–0. mikebaldini (1690) – neo_fight (1710), gameknot.com, 2015.

5.h4 h6

6.a3 a5 7.b5 Bd6 8.f4 Nbd7 9.a4 (9.d3 a4+=) 9...e5–/+ 10.g4 Be4 11.Bf3 (11.Rh3!?–/+) 11...ef4–+ 12.ef4 Bf4 13.Qe2 0–0 14.Be4? (better is 14.d3 Bg3 15.Kd1 Ng4 16.de4 Nf2 17.Kc1 de4 18.Bg2–+) 14...Ne4 (14...de4?! 15.g5 Nd5 16.Nh3–/+) 15.Nf3 (15.Qg2 Bg3 16.Kf1 Bh4–+) 15...Ng3 16.Qg2 Re8 17.Kf2 (17.Kd1 Nh1 18.Qh1–+) 17...Re2 18.Kg1 Qe7 19.Nc3 Rg2 20.Kg2 Qe6 21.Rhe1 Qg4 22.Nh2 Qh4 23.Nd5 (23.Nf3 Qg4 24.Nh2–+) 23...Ne4! 24.Nf4 (24.Re4 Nf6 Double attack (24...Bh2 Discovered attack; 24...Qg3 Deflection; 24...Nf6 Decoy)) 24...Qg3 25.Kh1 Nf2 0–1. mikebaldini (1665) – rickyross (1650), gameknot.com, 2015.

6.a3 c5 7.b5 Qc7 8.f4 a6 9.a4 Nbd7 10.c4 Bd6 11.cd5 ed5 12.Nf3 a5 13.h5 Ne4 (better is 13...0–0–/+) 14.Bg7+= Rh7 15.Bb2 f6 16.Nh4 Ng3 (16...Be6 17.Bg4 Ng3 18.Be6 Nh1 19.Qg4+/– (19.Bd5?! Bf4 20.Nf5 Bg3 21.Kf1 Be5+=)) 17.Rh2 (17.Nf5 Nh1 18.Qc2+– (18.Nd6?! Qd6 19.Bd3 Re7+/–)) 17...b6?? (better is 17...Be6+/–) 18.Nf5+– Nf5 (18...Bf4 19.ef4 Qf4 20.Ne3+–) 19.Bd3 (19.Qc2!? Bf4 20.Qf5 Bh2 21.Qh7 0–0–0 22.Qh6 Qg3 23.Kd1 Qg2 24.Bf6 Rf8+–) 19...Bf4 20.Bf5 (20.ef4?! Qf4 21.Qf3 Qh2 22.Bf5 Qg1 23.Ke2 Re7 24.Kd3 Ne5 25.Be5 Re5+=) 20...Bh2 21.Bh7 Qg3 22.Kf1 0–0–0 23.Qf3 Qd6 24.Nc3 Ne5 25.Qf5 (25.Qh3 Nd7+–) 25...Kb8 26.Ne2 Nc4 27.Bc3 Re8 (27...Be5 28.Qd3+–) 28.Qh3 (28.Kf2 Be5 29.d4 Bh2+–) 28...d4 29.ed4 (29.Bg6!? Re7 30.ed4 cd4+–) 29...cd4 30.Nd4?? (30.Bg6 Re2 31.Ke2 dc3 32.Qc3+– (32.dc3?? Qd2 33.Kf1 Ne3 34.Qe3 Qe3–+)) 30...Qf4–+ 31.Nf3 (31.Qf3 Nd2 32.Bd2 Qd4 33.Be4 Re4 34.Qe4 Qe4 35.Ra3–+) 31...Qd6 (31...Nd2 32.Bd2 Qc4 33.Bd3 Qd3 34.Kf2 Qe2) 32.Nh2 (32.Qh2!? Qh2 33.Nh2 Re7+–) 32...Nd2 33.Bd2 Qd2 34.Qg3 Kc8 35.Bf5 Kb7 36.Qf3 Kb8 37.Rd1 Qb4 (37...Qg5 38.g4 Qg7 39.Rd7 Qd7 40.Bd7+–) 38.Qg3 (38.Qg3 Ka8 39.Be6+–) 1–0. mikebaldini (1710) – mrmobil (1635), gameknot.com, 2014.

6.b5 a6 7.a4 Nbd7 8.Nf3 ab5 9.ab5 Ra1 10.Ba1 Bb4 11.Ne5 Ne5 12.Be5 0–0 13.c3 Be7 14.0–0 (14.d3!?+=) 14...Nd7–/+ 15.Bh2 Bh4 16.Bg4 Bh7 17.Qf3 (better is 17.Be2!?–/+) 17...Bd3–+ 18.Rc1 Nc5 19.Qh3 (19.b6 cb6 20.Qd1 Ne4–+) 19...Ne4 20.f3 (20.g3 Be7 21.f3–+) 20...Nf2 21.Qh4 Qh4 22.Na3 (22.g3 Qf6 23.Kf2–+) 22...f5 23.Bh3 Nh3 24.gh3 Qh3 (24...Rf6 25.Re1 Rg6 26.Kh1 Qe1 27.Bg1 Qg1) 25.Bc7 Qf3 26.Bf4 (26.Kh2 f4! 27.Rg1 Qh5 28.Kg2 Qg4 29.Kh2 Qh4 30.Kg2 f3) 26...Be4 27.Nc4 (27.Bh6 Qg2) 27...Qg2 0–1. mikebaldini (1630) – s03345 (1725), gameknot.com, 2015.

4.Nf3 a6

5.a3 e6 6.d4 (6.Be2 Bg4 (6...Bd6 7.Nh4 Bg6 8.f4 a5 9.ba5 Ra5 10.0–0 Be4 11.d3 Bg6=) 7.0–0 Bd6 8.Nc3 0–0 9.h3 Bh5 10.d3 Nbd7 11.e4 Bf3=; 6.h3 a5 (6...h6 7.Be2 Bd6 8.0–0 a5 9.b5 0–0 10.d3 Nbd7 11.Nd4 Bg6=) 7.ba5 Ra5 8.Nh4 Be4 9.d3 Bg6 10.Ng6 hg6 11.Qd2 Nc6=; 6.Nd4 Bg6 (6...Bg4 7.f3 Bh5 8.Bd3 Bg6 9.Bg6 hg6 10.f4 Bd6 11.0–0 g5+=) 7.Be2 Bd6 8.0–0 e5 9.Nf3 Nbd7 10.Nc3 Bf5 11.Rb1 0–0+=; 6.d3 Bd6 (6...a5 7.b5 Bd6 8.Be2 Bg4 9.0–0 0–0 10.Nbd2 Nbd7 11.c4 c5=) 7.Be2 a5 8.b5 Bg4 9.0–0 0–0 10.Ne5 Be2 11.Qe2 Nfd7=; 6.Nc3 c5 (6...Bd6 7.Nh4 Bg4 8.f3 Bh5 9.Be2 Be5 10.Rb1 Nbd7 11.g3 0–0+=) 7.bc5 Bc5 8.Nh4 Bg4 9.f3 Bh5 10.Be2 b5 11.f4 Be2+=) 6...Bd6 (6...a5 7.b5 Bd6 8.c4 dc4 9.Bc4 0–0 10.0–0 Nbd7 11.Nc3 Re8=) 7.c4 dc4 (7...Nbd7 8.c5 Be7 9.Be2 0–0 10.0–0 Ne4 11.Nc3 Nc3=) 8.Bc4 h6 (8...a5 9.b5 0–0 10.Nc3 Nbd7 11.0–0 Re8=) 9.0–0 0–0 10.Nc3 Bh7 (10...Nc6 11.Qe2 Qd7=) 11.Re1 (11.d5 e5+=) 11...Nc6 (11...a5+=) 12.e4 Be7 (12...e5 13.d5 Ne7 14.Qc2+=) 13.e5+/– Nd5 14.Bd5 ed5 15.Qb3 Re8 (15...Bf5 16.Qd5 Qd5 17.Nd5+/–) 16.Nd5 Bf5 17.Nf4 White intends e6 17...Bg4 (17...Bg5 18.e6 Kf8 19.ef7 Re1 20.Re1 Bf4 21.Re8 Qe8 22.fe8Q Re8+–) 18.e6+– fe6 (18...f6 19.d5 Qd6 20.dc6 Qf4 21.cb7+–) 19.Ne6 Be6 20.Re6 Kh8 (20...Kf8 21.Rae1 Qd7+–) 21.Rae1 Qd7 (21...Bd6 22.Re8 Qe8 23.Re8 Re8 24.d5+–) 22.d5 (better is 22.Rh6 gh6 23.Qf7+–) 22...Nd8 (22...Bf6 23.dc6 bc6 24.Bf6 gf6 25.Rf6 Re1 26.Ne1+–) 23.Ne5 (23.Rh6! Kg8 24.Qd3 Qf5 25.Qf5 Rf8 26.Qh7 Kf7 27.Qg7 Ke8 28.Qe7) 23...Qc8 (23...Qe6 24.de6 Bf6 25.Ng6 Kh7 26.Bf6 gf6+–) 24.Ng6 1–0. Chiarion,Elisa (1910) – Balzano,Filli (1730), ITA–ch G14, 2009.

5.Nc3 e6 6.Nd4 Bg4 7.f3 Bh5 8.h4 Bd6 (8...e5 9.Nb3 Be7 10.a3=+) 9.Nce2 h6 10.Nf4 Bf4 (< 10...Bb4 11.g4 Bg6 12.Nde6 fe6 13.Ng6+=) 11.ef4 Qd6 12.g4 Qf4 (better is 12...Bg6!?=+) 13.gh5+= Nh5 14.Qe2 Qg3 (14...e5 15.Rh3+/–) 15.Kd1+/– Nf4 (better is 15...Kd8!?+/–) 16.Qe3+– g6?? (16...Kd8+–) 17.Ne2 Ne2 18.Qe2 Rg8 19.Be5 Qe5 20.Qe5 Kd7 21.Qf4 Rf8 22.Qh6 Nc6 23.b5 Ne7 24.ba6 ba6 25.Qf4 Rab8 26.Ba6 Rb6 27.Bd3 f5 28.c4 Rb4 29.Rb1 Rfb8 30.Rb4 Rb4 31.Re1 Nc6 32.Qe3 e5 33.cd5 Nd4 34.Qe5 c5 35.Qe8 Kc7 36.Re7 (36...Kd6 37.Qd7#) 1–0. jaskier (2050) – rla, internet, 2007.

5.c4 dc4 6.Bc4 b5 (6...Nc6 7.a3=) 7.Be2+= e6 (7...Nc6 8.a3+=) 8.Qb3 (8.Nd4 Bb4 9.a4 Be4 10.ab5 ab5 (10...Bg2? 11.Rg1 Be4 12.Nc3+–) 11.Ra8 Ba8 12.Bb5 c6+=) 8...Qd5 (8...Nc6 9.a3=) 9.Qd5 Nd5 10.a3 Nd7 11.d3 Bg4 (11...N5f6 12.Nd4+=) 12.Nbd2 (12.Nc3!?+=) 12...c5= 13.bc5 Nc5 14.Ne5 (better is 14.Ne4=) 14...Be2–/+ 15.Ke2 f6 (15...Na4 16.Bc1–/+) 16.Nc6 (better is 16.d4!? Na4 17.Nd3+=) 16...Na4–/+ 17.Bc1 Rc8 18.Nd4 (18.Na5 Rc2–/+) 18...Kf7 (18...e5!? 19.N4b3–/+) 19.Ne4–/+ Nac3 20.Nc3 Rc3 21.Ra2 Be7 (21...Bc5–/+) 22.Kd2 (22.e4 Bc5 23.Nb5 ab5 24.ed5 ed5 25.Kd2=) 22...Rhc8–/+ 23.Rc2 (23.Bb2!? e5 24.Bc3 Nc3–+) 23...b4–+ 24.ab4 Bb4 25.Rc3 Nc3 26.Nb3 a5 27.d4 a4 28.Nc5 Ne4 29.Ke2 Nc5 30.dc5 Rc5 31.Rd1 Rc7 32.Rd4 Rb7 33.Rd3 Be7 34.Ba3 Ra7 35.Kf3 h5 36.Ke2 g5 37.Be7 Ke7 38.Ra3 Kd6 39.Kd3 Kd5 40.Kc3 Kc5 41.h3 f5 42.g3–/+ e5 43.f3? g4–+ 44.fg4 fg4 45.hg4?! hg4 46.e4 Ra6 47.Ra1 a3 48.Rd1 a2 49.Ra1 Ra3 50.Kd2 0–1. Tirado,Parra Alberto (1925) – Ruiz,Escobar Israel (1790), Collado Villalba ESP, 2012.

5.Be2 Nc6 6.a3 h6 7.0–0 e6 8.c4 dc4 9.Bc4 Bd6 10.Nc3 b5 11.Bb3 Ne5 12.Bc2 (12.Ne5!? Be5 13.d4+=) 12...Bc2 13.Qc2 c6 (13...Nf3 14.gf3 0–0 15.d4=+) 14.Ne4 Nf3 15.gf3 0–0 16.Bf6 gf6 17.f4 (17.Qc6 Be5 18.d4 Bc7+/–) 17...Bc7 (better is 17...f5!? 18.Nd6 Qd6=) 18.Qc6+/– Kh7 19.Nf6 Kh8 20.Ne4 Rg8 21.Kh1 Qe7 22.Rg1 Rgc8 23.Qc3 e5 24.Rac1 Bb6? (24...a5 25.Qc6 Qe6 26.fe5 (26.Qb5?! ef4 27.Nc5 Qd5 28.e4 Qd2+–) 26...ab4 27.Qe6 fe6 28.Rg6 Be5 29.Rc8 Rc8 30.Rh6 Kg7 31.Re6 ba3 32.Re5 Rc1 33.Kg2+/–) 25.Qb2 (25.Qe5 Qe5 26.fe5 Rc1 27.Rc1 Rd8+–) 25...Rg8? (better is 25...Rc1 26.Rc1 f5+–) 26.fe5 Rg7 27.Rg7 Kg7 28.Ng3 (28.Nd6 Qe6+–) 28...Kg8 29.f4 Rd8 30.Rc6 Qb7 31.Kg1?? (31.Qc3 Rc8 32.Nf5=+) 31...Qc6–+ 32.Nf5 Qg6 33.Ng3 h5 34.Kf2 h4 35.Nf1 Kh7 36.d4 Rg8 37.Ke1 Bd8 38.Qf2 (better is 38.d5–+) 38...Qb1 39.Ke2 Qb2 40.Kf3 Qa3 (41.Qc2 Kh8–+) 0–1. valpa – adamant, HCL–B1684 playchess.de, 2003.

5.c4 e6

6.a3 c5 7.bc5 (7.cd5 A) 7...ed5 8.bc5 (8.Bf6 Qf6 9.Nc3 d4 10.ed4 cb4 11.Qe2 Qe6 12.Nd5 Bd6=; 8.Ne5 Nbd7 9.bc5 Bc5 10.Bd3 Bd3 11.Nd3 Rc8 12.0–0 0–0=; 8.Nc3 cb4 9.ab4 Bb4 10.Qa4 Nc6 11.Nd4 Bc3 12.Nc6 Qb6=) 8...Bc5 9.Bf6 Qf6 10.d4 Bb6 11.Qb3 Qe6 12.Nbd2 0–0+=; B) 7...Qd5 8.Bf6 (8.bc5 Bc5 9.Bf6 gf6 10.Nc3 Qd8 11.Nh4 Bg6 12.Ng6 hg6=) 8...gf6 9.Nc3 Qd8 10.bc5 Bc5 11.Nh4 Bg6 12.Ng6 hg6=; 7.Nh4 Bg4 (7...Bb1 8.Rb1 cb4 9.ab4 dc4 10.Bc4 Bd6 11.Qf3 Bb4 12.Qb7 Qd2=) 8.Qa4 (8.f3 Bh5 9.bc5 Bc5 10.Qa4 Nbd7 11.Nc3 d4 12.ed4 Bd4–/+) 8...Nfd7 9.g3 cb4 10.cd5 ed5 11.ab4 Be6 12.Bb5 f6=; 7.Qa4 A) 7...Nc6 8.Ne5 (8.bc5 Bc5 9.cd5 b5 10.Qh4 Nd5 11.Qd8 Rd8 12.Bg7 Rg8=; 8.cd5 ed5 9.Ne5 Bd7 10.Nd7 Nd7 11.bc5 Nc5 12.Qg4 b5=) 8...Rc8 9.cd5 Qd5 10.Nc6 Qc6 11.b5 Qd7 12.Nc3 Rb8=; B) 7...Nbd7 8.bc5 (8.d3 b5 9.cb5 ab5 10.Qb5 cb4 11.ab4 Rb8 12.Qa4 Rb4+=) 8...Bc5 9.Nh4 Bb1 10.Rb1 dc4 11.Bf6 Qf6 12.Rb7 Rd8=) 7...Bc5 (7...dc4 8.Bd4 (8.Bc4 Bc5 9.Nd4 Bd4 10.Bd4 b5 11.Be2 Nc6 12.Bb2 0–0+=; 8.Qa4 Nbd7 9.Nd4 Bd3 10.Bd3 cd3 11.Nb3 Rc8 12.Bd4 Be7–/+; 8.Nd4 Bd3 9.Bd3 cd3 10.Qa4 Nbd7 11.Nb3 Rc8 12.Bd4 Be7–/+) 8...Nbd7 9.c6 bc6 10.Bc4 Bd6 11.d3 0–0 12.0–0 e5=) 8.d4 (8.cd5 ed5 (8...0–0= 9.de6 fe6 10.d4 Bd6 11.Nbd2 Nc6 12.Rc1 Rc8+=) 9.Bf6 Qf6 10.d4 Bb6 11.Qb3 Qe6 12.Nbd2 0–0+=; 8.Bd4 Bd4 9.Nd4 Bg6 10.cd5 Qd5 11.Nc3 Qd6 12.Qb3 b5=) 8...Be7 9.Be2 (9.Nc3 dc4 10.Bc4 0–0 11.0–0 b5 12.Bd3 Bd3=) 9...Nc6 (9...0–0 10.cd5 Qb6 11.Ra2 Rc8 12.Nc3 Qa5+=) 10.0–0 (10.cd5 ed5 11.0–0 Rc8 12.Nbd2 0–0=) 10...0–0 (10...dc4 11.Bc4 0–0 12.Bd3 Bd3=) 11.Nh4 (11.cd5 Nd5 12.Nbd2 Bg6=) 11...Bb1 (11...Be4 12.cd5 (12.Nd2+= dc4+=) 12...Bd5=) 12.Qb1 (12.Rb1 dc4=) 12...Ne4 (12...dc4=) 13.Nf3 Qa5 14.Rc1 Nf6 (14...Rac8 15.g3+=) 15.c5 (15.cd5 Nd5 16.g3 Rac8+/–) 15...Qd8 (15...Ne4 16.Qc2+=) 16.Bc3 Rb8 17.Qc2 Ne4 18.Bb2 Bh4 (18...b6 19.cb6 Rb6 20.Nd2=) 19.g3 Bf6 (19...Be7!?+=) 20.Bd3+/– Ne7 (20...b6 21.Rab1+/–) 21.Be4+– de4 22.Qe4 Nd5 (22...Qd5 23.Nd2+/–) 23.Rab1 Re8 24.Ne5 (24.Qd3!? Ne7+–) 24...Be5 25.Qe5 Nf6 26.Bc3 Qd7 27.Rb3 Qc6 (27...Nd5 28.Bd2 Qa4 29.Rcb1+–) 28.Rcb1 Qf3 29.Qf4 Qe2 (29...Qd5 30.Qc7 e5 31.Rb7+–) 30.Rb7 Rb7 31.Rb7 h6 32.Qc7 Rf8 33.Bb4 (better is 33.Rb8 Qd1 34.Kg2+–) 33...Nd5 (better is 33...Ng4 34.Qf4 g5 35.Qg4 Qg4–+) 34.Qe5+/– Qg4?? (34...a5 35.Ba5 Qa6+=) 35.Kg2 (better is 35.c6 Rc8 36.Rb8 Rb8 37.Qb8 Kh7+–) 35...Nb4?? (35...f6 36.h3 Qh3 (36...fe5?? 37.hg4 ed4 38.ed4+–) 37.Kh3 fe5+–) 36.ab4 h5 (36...f6 37.Qf4 Qh5 38.Qe4+–) 37.h4 (37.Rb8 Rb8 38.Qb8 Kh7+–) 37...Qg6 (37...f6 38.Qf4 Qg6 39.Rb8 Rb8 40.Qb8 Kh7 41.Qb7+–) 38.Qf4 (better is 38.Rb8!? Rb8 39.Qb8 Kh7+–) 38...f6 39.Qf3 Rd8 (39...Re8 40.Rb6 Qb1 41.Qh5 Qe4 42.Qf3+–) 40.Rb6 Rd5 (40...Qb1+–) 41.Re6 Rf5 (41...Rd8+–) 42.Qe4 Kh7 43.c6 a5 44.c7 1–0. pzn2pawn (1865) – iceczar (1680), redhotpawn.com, 2016.

6.a3 Nc6 7.cd5 Nd5 8.b5 ab5 9.Bb5 Bc5 (9...Nde7 10.Nd4+=) 10.Bc6 bc6 11.Qc1 Qe7? (better is 11...Ra5 12.Bc3 Rb5 13.Bg7 Rg8+/–) 12.d4+– (12.Bg7?! Rg8 13.Bb2 Rb8+/–) 12...Ra5 13.dc5 Rc5 14.Qd1 Rc2 15.Bg7 Rg8 16.Be5 Rg2 17.Nbd2 f6? (17...Ne3 18.fe3 Rcd2 19.Qd2 Rd2 20.Nd2 Qh4 21.Bg3 Qf6+/–) 18.e4 Qc5 (18...Rd2 19.Nd2 fe5 20.ef5 ef5+–) 19.Bd4 Be4 (19...Rd2 20.Qd2 Qc4 21.ef5 e5+–) 20.Bc5 Nc3 21.Qc2! (21.Qc2 Bc2 22.Rc1+–) 1–0. Pcmvr – WhiteKnight, playchess.de, 2004.

6.a3 Be7 7.d4 0–0 8.Nc3 b6 (8...Nbd7 9.Be2=) 9.cd5 Ne4 (better is 9...ed5 10.Bd3 Bd3 11.Qd3 Re8=) 10.de6+/– Nc3 (better is 10...fe6!? 11.Ne4 Be4+/–) 11.ef7+– (worse is 11.Bc3 fe6 12.Bd3 Qd5+/–) 11...Kh8 (11...Rf7 12.Bc3 Be6 13.Qc2+–) 12.Bc3 Rf7 13.Bc4 Rf8 14.Ne5 Qe8 15.Qb3 Bg6 16.0–0 Nc6 (16...b5 17.Be6+–) 17.Nc6 Qc6 18.Bd5 (18.Bd5 Qd6 19.Ba8 Ra8 20.f3+–) 1–0. Wall,Bill – Roger33, internet, 2001.

6.cd5 Nd5 7.a3 c5 8.bc5 Bc5 9.Bg7 Rg8 10.Bb2 Nc6 11.d4 Bd6 12.Nbd2 Bg4 13.h3 Bh5 14.Qb3 Rb8 15.Rc1 Qd7 16.e4 Nf4 17.e5 Be7 18.g3 Nd5 19.Qd1 Nb6 20.Bg2 f5 21.ef6 Bf6 22.Ne4 Bf3 23.Nf6 Ke7 24.Qf3 Qd6 25.Ng8 Rg8 26.Qh5 Rg7 27.d5 1–0. Machete99 (2220) – guest1480, ICC, 2002.

4.Nf3 c6

5.a3 g6 6.c4 Bg7 7.cd5 cd5 8.Bb5 Bd7 9.Nc3 0–0 10.0–0 Bb5 11.Nb5 a6 12.Nc3 Nbd7 13.d4 Nb6 14.Nd2 Rc8 15.Rc1 h5 16.Na2 Rc1 17.Qc1 Ng4 18.Qc2 Qd6 19.g3 h4 20.Qd1 f5 21.f3?? (better is 21.Qf3+=) 21...Ne3–+ 22.Qe2 Nf1 23.Qf1 (23.Kf1 Rc8 24.Nb3 hg3 25.hg3 Qg3–+) 23...hg3 24.f4 (24.h3 Qe6 25.Kg2 Qe3–+) 24...gh2 (better is 24...Rc8!? 25.Qd3 Qc7 26.Bc3–+) 25.Kh2 Kf7 (25...Na4 26.Bc1 Rc8 27.b5–+) 26.Kg2 (26.Nc1 g5–+) 26...Rh8 27.Nb3 Rh4 28.Bc1 Bh6 29.Kg3 Rg4 30.Kh3 Bf4 31.Bf4–+ Rf4 32.Qg2 Rg4 33.Qf2 Qe6 34.Nc5–+ Qc8 35.Nc3 e6 36.a4 Nd7 (36...Nd7 37.Qh4 Rh4 38.Kh4 Qh8 39.Kg3 Nc5 40.bc5 Qd4 41.Nd5 ed5–+; 36...Qh8 37.Qh4 Qh4) 0–1. Piasecki,Andrzej – Zgarda,Marek, Poznan op–B Poland, 2008. (=1.e3 c6 2.a3 d5 3.b4 Bf5 4.Bb2 Nf6 5.Nf3)

5.a3 h6 6.Bf6 gf6 7.d4 e5 8.c4 Bg7 9.Nc3 Be6 10.e4 (10.cd5 cd5 11.Bb5 Nd7+=) 10...de4 11.Ne4 0–0 12.Nc5 Bc8 13.Be2 b6 14.Nb3 e4 15.Nfd2 f5 16.Ra2 a5 (16...Re8 17.0–0+=) 17.ba5 ba5 18.a4 Na6 19.0–0 (19.c5 Nb4 20.Rb2 Bd4 21.Nd4 Qd4–/+) 19...Nb4 (19...Bd4?! 20.Ne4 Be5 21.Ng3=) 20.Ra3 Qe7 (20...Bd4 21.Nd4 Qd4 22.Qc1+=) 21.Qc1 (better is 21.c5!?=) 21...Nc2!?+= 22.Ra2 (22.Qc2 Deflection from a3 22...Qa3) 22...Nd4 23.Nd4 Bd4 24.Nb3 Bg7 25.Rd1 Re8 26.Bf1 Be6 27.Nd4 Qc5 28.Rad2 Bf6 29.Ne6+= Re6 30.Rd7 Bg5 Black prepares the advance e3 31.Qc3 Rae8 Black plans e3 32.Qd4 Qd4–+ 33.R7d4 e3 34.f4 Bf6 35.Rd6 Bc3 36.Be2 Bd2 37.Re6 fe6 38.Rb1 Bb4 39.Kf1 Rd8 40.Rd1 Bd2 41.Rb1 Bb4 42.Rd1 Bd2 43.Rb1+= Bb4 44.Rd1= ½–½. Gschwendtner,Michael – Rudolph,Johannes (2245), BL2–Sued, 2000.

5.a4 e6 6.b5 a6 7.c4 dc4 8.Bc4 Bd3 9.Qb3 Bc4 10.Qc4 ab5 11.ab5 Ra1 12.Ba1 Qd5 13.Qd5 Nd5 14.Be5 Nd7 15.bc6 bc6 16.Bb2 (16.Ke2 Ne5 17.Ne5 c5=) 16...f6 17.Nd4 Nb4 18.Ke2 e5 19.Ne6 Kf7 20.Nf8 Rf8 21.Rc1 Rc8 22.Nc3 Ke6 23.Ba3 Nd5 24.Ne4 Nb8 (24...g6 25.d3=) 25.Rb1 (25.Nc5 Kf7+=) 25...Nc7 (25...Nd7!?=) 26.Nc5+/– Kf5 27.Rb7 Nb5?? (27...Kg6 28.d3+=) 28.Bb4 (28.Rg7 e4 29.Bb2 Nd4 30.Bd4 h5 31.h3 h4 32.g4 hg3 33.fg3 Rh8 34.g4) 28...Kg6 (28...Rg8 29.d3+/–) 29.Ne6 Rg8?? (better is 29...f5+/–) 30.Nf8+– Rf8 31.Bf8 Na6 32.Rg7 (32.Rg7 Kf5 33.g4 Ke6 34.e4+–) 1–0. Myers – Alvarez, US–ch Santo–Domingo, 1966.

5.a4 h6 6.b5 e6 7.c4 (7.Nd4 Bh7=) 7...Be7 (7...Bc5 8.Nc3=) 8.Be2= 0–0 9.0–0 Bh7 10.d4 dc4 11.Bc4 Nbd7 12.Nc3 Qa5 13.Qb3 Nd5 14.e4 Nc3 15.Bc3 Qc7 16.bc6 bc6 17.Nd2 (17.Qc2 Nf6 18.Rfe1 Rfd8=) 17...Rab8= 18.Qc2 Bf6 (18...Nf6 19.Rfb1=) 19.f4 (19.Rab1 Nb6=) 19...c5 20.d5 ed5 21.Bd5 Bc3 22.Qc3 Nf6 23.Rac1 Rfc8 24.f5 Nd5 25.ed5 f6 (25...c4 26.Ne4=) 26.Ne4 Qd7 (26...c4 27.d6 Qc6 28.Rce1+=) 27.Qf3 (27.d6!? Qc6 28.Qc4 Kh8 29.Qd3+/–) 27...c4 (27...Qd5 28.Nf6 gf6 29.Qd5 Kh8 30.Rc5 Rc5 31.Qc5 Bf5 32.Qf5 Rf8 33.Rd1 a5 34.Rd7 Rf7 35.Rf7 Kg8 36.Qh7) 28.Qg3 Kh8 (28...Qd5?? 29.Nf6 Kh8 30.Nd5+–; 28...Bf5?? 29.Nf6 Kh8 30.Nd7 Bd7 31.Rf7+–) 29.Rc4 (better is 29.Nd6!? Rb3 30.Qf4=) 29...Qd5–/+ 30.Rfc1?? (better is 30.Rc8 Rc8 31.Qf3–/+) 30...Qc4–+ (30...Bf5?! 31.Rc8 Rc8 32.Rc8 Bc8 33.Nc3 Qd4 34.Kh1–+) 31.Rc4 Rb1 32.Kf2 Rc4 33.Qd3 Rb2 34.Kf3 Bg8 35.g3 Rbb4 36.Nf6?? gf6 37.Qd7 Ra4 38.Qe7 Bd5 39.Kf2 Rc2 40.Ke3 Re4 (40...Re4 41.Kd3 Re7 42.Kc2 a5–+) 0–1. Sieber,Martin (2025) – Buran,Jaroslav (2215), CZE, Liga, 2013.

5.c4 a5 6.b5= e6 7.Nd4 Bg6 8.bc6 bc6 9.cd5 cd5 10.Bb5 Nbd7 11.0–0 Bd6 12.Qb3 (12.f4!?=) 12...0–0+= 13.Bc6 (13.Nc6 Qc7+=) 13...Rb8–/+ 14.Bb5 Nc5 15.Qd1 Qc7 16.Nc3 (16.f4 e5 17.fe5 Be5–+) 16...Bd3 17.Ba3? (better is 17.f4 Bf1 18.Qf1–+) 17...Bh2 (17...Bf1?! 18.Kf1 Rfc8 19.Rc1–+) 18.Kh1 Bf1 19.Qf1 Bd6 20.Nc6 Rb6 21.Na5 Ra8 (21...Nce4 22.Ne4 Ne4 23.Bd6 Qd6 24.a4–+) 22.Bb4 (22.Bc5 Qc5 (22...Ra5?! 23.Bb6 Qb6 24.Rb1–/+) 23.Nb3 Qb4–+) 22...Nce4 23.Bd6 Qd6 24.Nb3 (24.Ne4 Ne4 (24...de4?! 25.Nc4 Qc7 26.Nb6+=) 25.Nb3 Qb4–+) 24...Nc3 (better is 24...Ng4 25.g3 Ngf2 26.Kg1 Qg3 27.Qg2 Qg2 28.Kg2 Nc3–+) 25.dc3 Ng4 26.g3 Rb5! 27.Qb5 Nf2 28.Kg2 Ne4 29.Kf3 (29.Qe2 Qg3 30.Kf1 Qh3 31.Qg2 Qe3 32.Qc2–+) 29...Qg3 30.Ke2 Nc3 (30...Nc3 31.Kd2 Nb5–+) 0–1. Lange,Werner – Hielscher,Ursula, corr, 1998.

5.c4 Na6 6.a3= Nc7 7.Nc3 g6 (7...e6 8.c5=) 8.cd5+= Ncd5 9.Nd5 Qd5 10.d3 Bg4 11.Be2 Bg7 12.e4 Qh5 13.Rc1 h6 (13...Qh6 14.Rc4 Nd7 15.d4+=) 14.Rc5+/– White intends e5 14...g5 15.0–0 (15.Qc2 0–0+=) 15...Rg8 (15...0–0 16.h3 Bf3 17.Bf3+=) 16.Bf6 Bf6 17.e5 (17.h3 Bc8+/–) 17...Bh8 18.d4 Rd8 19.Re1 (19.h3 Bd7+=) 19...Bf3 (19...Be6 20.h3=) 20.Bf3+= White gets deadly initiative (worse is 20.gf3 Qh4 21.Qc2 Qd4–/+) 20...g4 21.Be4 Rg5 22.f4 gf3 23.Bf3 Qg6 24.h4 Rg3 25.Kh2 e6 26.b5 Ke7 27.Qd2 Rg8 28.Rc6! Threatening mate... how? 28...Rg2 29.Qg2 Qg2 30.Bg2 Kd8?? 31.Rcc1 (31.Rcc1 Kd7 32.Bb7+–; better is 31.Rd6 Ke7 32.Rc1 Rb8+–) 1–0. Hort,Vlastimil – Subrt,Jaroslav, Hamburg, 1969.

5.c4 Qb6 6.Qb3 Nbd7 7.c5 Qc7 8.d4 Be4 9.Nbd2 g6 10.Ne5 Bg7 11.f4 h5 12.b5 Ne5 (better is 12...h4=) 13.fe5+/– (worse is 13.Ne4 Ne4 (worse is 13...de4 14.de5 Nd5 15.Rd1+=) 14.b6 Qc8 15.fe5 ab6–/+) 13...Ng4 14.Ne4 de4 15.Bc4 e6 16.0–0 Ke7 17.h3 Nh6 18.Qc2 Nf5 19.Qe4 Bh6 20.Rf3 Qd7 21.a4 g5 22.g4 Nh4 23.Rf2 hg4 24.hg4 Bg7 25.Raf1 Raf8 26.Bc3 Ng6 27.Be1 Ke8 28.bc6 bc6 29.Rb2 Ke7 (29...Rh6+–) 30.Qb1 Rc8 31.Ba6 Rc7?? 32.Bd3 Nf4 33.Be4 Nd5 34.Ba5 Rh4 35.Bc7 Rg4 36.Kf2 Nc7 37.Rg1 Rh4 38.Rb7 Be5 39.Qd3 Bg7 40.Rg5 Kf8 41.Bg2 e5 42.Qf5 Qd8 43.Rg7! Rf4 44.ef4 Qd4 45.Kg3 ef4 46.Kh2 Qg7 47.Qf4 Ne6 48.Qb8 1–0. Flak,Pawel (2240) – Wisniewski,Michal (1835), VI Miedzynarodowy Turniej Szachowy Poland, 2013.

5.c4 dc4 6.Bc4 e6 7.Qb3 +=.

5.d3 Qc7 6.Be2 e6 7.a3 Bd6 8.h3 Nbd7?? (8...e5 9.c4 Nbd7 10.cd5 cd5 11.Nc3=) 9.0–0?? (better is 9.g4 Bg6 10.g5+/–) 9...h5 10.Nbd2 h4 (10...a5!?=) 11.c4+= g5 (11...e5!?+=) 12.cd5+/– ed5 13.e4 g4 14.ef5 gf3 15.Nf3 0–0–0 16.b5! c5 17.a4 Rdg8 18.Kh1 Rh7 19.a5 b6 20.ab6+– Qb6 21.Qa4 d4 22.Qa7 Qa7 23.Ra7 Nd5 24.Ra8 Nb8 25.Nd2 Nb6 26.Ra7 Rhg7 27.Bf3 Bc7? 28.Ne4 (28.Ne4 N8d7 29.Bd4+–) 1–0. Fournier,Frederic (1985) – Sicilietis (1925), Active (3/1), 2004.

5.Be2 Qb6 6.a3 a5 7.0–0 ab4 8.Bd4 c5 9.Bc5 Qc5? (better is 9...Qc7 10.Bb4 Qc2 11.Qc2 Bc2+=) 10.ab4+– Qc2?? (better is 10...Ra1 11.bc5 Nbd7+–) 11.Qc2 Bc2 12.Ra8 Nfd7 13.Rc1 1–0. kamret (2245) – stefanj (1935), GameColony.com, 2003.

5.Be2 g6 6.Nd4 Qd7 7.f4 Bg7 8.0–0 Na6 9.a3 Nc7 10.h3 Ne4 11.Qe1 e5?? (better is 11...0–0–0=) 12.Nf5+– gf5 13.d3 (13.fe5?! Qe6+=; 13.Be5?! Be5 14.fe5 Qe6+=) 13...d4 (better is 13...Nf6 14.fe5 Ng8+–) 14.de4 fe4 15.ed4 (better is 15.fe5!? d3 16.Bh5 Rf8+–) 15...ed4 16.Nd2 e3 17.Nb3 0–0–0 18.f5 (18.Rd1 Rhg8+–) 18...Be5 19.f6 (19.Rd1 Qd6 20.f6 Ne6+–) 19...Qd6? (19...Rhg8 20.Qh4 Qd5 21.Bf3+–) 20.Qh4 (20.Rd1!? Ne6 21.Bg4 Kb8 22.Be6 Qe6 23.Bd4 Bh2 24.Kh2 e2+–) 20...Ne6 21.Rad1 Kb8 (21...Rhe8 22.Qh7 Qc7 23.Ba1+–) 22.Rf3 (22.Nd4 Nd4 23.Bd4 Bd4+–) 22...Rhg8 23.Re3! Bg3 (23...de3 24.Rd3 Double attack (24.Rd6 Pinning; 24.Rd6 Deflection; 24.Rd3 Decoy)) 24.Rg3! (24.Qh7?! Bf2 25.Kf2 de3 26.Kg1 Qg3 27.Rd8 Rd8+–) 24...Rg3 (24...Qg3 25.Qg3 Double attack; 24...Rg3 25.Bd4 Decoy) 25.Nd4 (25.Bd4?! Qc7+–) 25...Nf4 (25...Rgg8+–) 26.Nc6! Qc6 (26...bc6 27.Rd6 Double attack (27.Rd6 Discovered attack; 27.Rd6 Decoy; 27.Qg3 Zwischenzug); 26...Qc6 27.Rd8 Discovered attack (27.Rd8 Pinning; 27.Be5 Deflection; 27.Be5 Decoy; 27.Rd8 Clearance; 27.Rd8 Overloading; 27.Qg3 Zwischenzug)) 27.Qf4 Kc8 28.Rd8 Kd8 29.Qg3 Qc2 30.Qg8 (30.Qd6 Kc8 31.Bg4 Qf5 32.Bf5) 30...Kc7 31.Be5 (31.Qf7 Kb6 32.Bd4 Qc5 33.Bc5 Kc6 34.a4 b6 35.Bf3) 31...Kb6 (31...Kc6 32.Qe8 Kd5 33.Bf3 Kc4 34.Qf7 Kb5 35.Qb7 Ka4 36.Qa6 Kb3 37.Bd5 Qc4 38.Qc4 Ka3 39.Qb3) 32.Qd8 1–0. mikebaldini (1650) – jaffe123 (1680), gameknot.com, 2015.

5.h3 h5 6.b5 Nbd7 7.Nd4 Bg6 8.bc6 bc6 9.Nc6 Qb6 10.Bf6 Qc6 11.Bc3 e5 12.a4 a6 13.Be2 Bc5 14.d4 Bd6 15.de5 Ne5 16.0–0 Nd7 (16...Be4!?+=) 17.Qd2 Be5 18.Rd1 Bf6 19.Qd5 Qd5 20.Rd5 Bc2 21.Bf6 Nf6 22.Rc5 Bg6 23.Ba6! 0–0 (23...Ra6 24.Rc8 Double attack) 24.Bb5 Ne4 25.Rc6 Rfb8 26.Na3 Nd2 27.Rc7 Rd8 28.Ra2 h4 29.Rb2 Ne4 30.Nc4 Nc3 31.Nb6 Nb5 32.Rb5 (32.Rb5 Ra6 33.a5+–; 32.ab5 Rd1 33.Kh2 Raa1 34.g4 Be4 35.f3 Bf3 36.Rc8 Kh7 37.Rh8 Kh8 38.Rb1 Rd2 39.Kg1 Rb1#) 1–0. Lisakowski,Christof (2260) – Waibel,Ulrich (1830), RS6D – A00 – Sokolsky Alt–1, 2004.

5.Nh4 Bg6 6.Ng6= hg6 7.d4 e6 8.a3 Qc7 9.g3 Nbd7 10.f4 (10.c4 Bd6=) 10...Ne4 11.Bg2 Ndf6 12.Nd2 Nd6 13.Qe2 Be7 14.g4 0–0–0 15.g5 Nd7 16.Qd3 (16.c4!?=) 16...Nb6=+ 17.Kf2 (17.0–0–0 Rh7=+) 17...Ndc4 18.Nc4 Nc4 19.Bc1 Rh4 20.h3 Nd6 21.Bd2 Nf5 (21...Rdh8 22.Rhb1–/+) 22.Be1 (22.c4 Nd6 23.cd5 ed5=) 22...f6 23.Kg1 (23.Ke2 Rh7 24.gf6 gf6=+) 23...Rh7 24.gf6 gf6 25.c4 Kb8 26.Rc1 Qd7 27.c5 Rg8 28.Kf1 g5 29.e4 de4 30.Be4 Rh6 31.Bf5 ef5–+ 32.Bg3 Kc8 33.Re1 Rgh8 34.Kg2 Qd5 35.Qf3=+ Qf3 36.Kf3= Bd8 37.Kg2 Bc7 38.Ref1 Rg6 39.Kf3 gf4 40.Bf2+= Kd7 41.Re1 Rgg8 42.h4 a5 43.Re2 ab4= 44.ab4 Ra8 45.Rb2 Ra3–/+ 46.Ke2 f3 47.Kd2 Bf4 48.Kc2 Be3 49.Be3 Re3 50.Rbb1 Re2 51.Kc3 Rhe8 52.Rbd1 f2 53.Rhf1 Re1–/+ 54.Kd2 R1e2?? 55.Kc1 Ra8–+ 56.Kb1 Ke6 57.h5 Kf7 58.d5 cd5 59.b5? Ra5–+ 60.Rd5 Rb5 61.Kc1 Re1 (62.Rd1 Rc5 63.Kb2 Rce5–+) 0–1. Diener,Rudolf – Stabenow,Juergen, corr SOK–87–08, 1989.

5.a3 Nbd7

6.Be2 Qc7 7.Nh4 Be6 8.f4 White fights for the Initiative 8...g6 (8...Nb6!?+=) 9.g4+/– h6 (9...d4!? 10.g5 Nd5+/–) 10.f5+– gf5 11.gf5 (worse is 11.Nf5 Rg8–/+) 11...Bf5 12.Nf5 e5 (12...Rg8 13.b5+–) 13.c4 dc4 14.Bc4 Nb6 15.Ba2 Rg8 16.Qb3 Nbd5 17.Nc3 0–0–0 (17...a5 18.b5+–) 18.Nd5 Nd5 19.0–0–0 Rg2 20.e4 Nf4 21.Qf7 Nd3 22.Kc2 Nb2 23.Be6 Kb8 24.Qc7 Kc7 25.Kb2 (25.Kb2 Rgd2 26.Rd2 Rd2 27.Kc3+–) 1–0. Scholz,Sascha (2205) – Waibel,Ulrich (1830), RS6D – A00 – Sokolsky Alt–1, 2004.

6.Be2 Qc7 7.Nh4 Bg6 8.f4 e6 9.0–0 Bd6 10.Ra2 a5 11.b5 0–0 12.Ng6 (12.Nc3 Nc5=) 12...fg6 13.g3 e5 14.c4 ef4 15.bc6? (better is 15.ef4!? Nb6 16.cd5 Nfd5 17.Nc3+=) 15...fg3–+ (15...Qc6?! 16.cd5 Nd5 17.gf4+=) 16.cd7? (better is 16.hg3 bc6 17.cd5 cd5 18.Qc1–+) 16...gh2 17.Kg2 Ne4 18.Bf6 (18.Bf3 Qd8 19.Qe1 h1R 20.Kh1 Qg5 21.Bg7 Kg7–+) 18...Ng3 (18...gf6 19.Qa4 Ng3 20.Nc3 Nf1 21.Bf1–+) 19.Nc3 (19.c5 Nf1 (19...gf6?! 20.cd6 Qd6 21.Bb5=) 20.cd6 Qd6 21.Qf1 Rf6–+ (21...gf6?! 22.Bb5=; worse is 21...Qf6 22.Qf6 Rf6 23.Kh2+=)) 19...Nf1 (19...Rf6?! 20.Rf6 gf6 21.Nd5–+) 20.Nd5 h1Q! 21.Kh1 Ng3 22.Kg2 Qd7 23.Bh4 (23.Bg4 Qf7 24.Bf3 gf6 25.Nf4–+) 23...Ne2 24.Qe2 Rf5 (24...Rf5 25.Ra1 Raf8–+) 0–1. Schulz,Hans_Juergen (2305) – Waibel,Ulrich (1830), RS6D – A00 – Sokolsky Alt–1, 2004.

6.Be2 e6 7.0–0 Bd6 8.d3 Qe7 (8...a5 9.ba5 (9.Qe1 ab4 10.ab4 Ra1 11.Ba1 Qb6 12.Bf6 Nf6 13.c3; 9.Qd2 ab4 10.ab4 Ra1 11.Ba1 Qb6 12.c3 0–0 13.Bb2) A) 9...Ra5 10.Bc3 (10.Nd4 Bg6 11.f4 0–0 12.c4 dc4 13.dc4) 10...Ra4 11.Bb2 0–0 12.c4 Ra6 13.Nh4; B) 9...Qa5 10.Nbd2+= (10.Nh4 Bg6 11.Ng6 hg6 12.h3 Qb6 13.Ra2; 10.Nd4 Bg6 11.f4 0–0 12.Nd2 c5 13.N4b3) 10...e5 11.c4 0–0 12.d4 e4 13.Nh4; 8...e5 9.c4 A) 9...Qe7 10.Nbd2 (10.Nc3 dc4 11.dc4 e4 12.Nh4 Be6 13.Qc2) 10...0–0 11.Qc2 Rfd8 12.c5 Bc7 13.e4; B) 9...0–0 10.Nc3 (10.Nbd2 Re8 11.e4 Bg6 12.Qc2 b6 13.cd5; 10.c5 Bc7 11.Qc2 Qb8 12.Nbd2 Re8 13.e4) 10...Qe7 11.cd5 cd5 12.Nb5 Bb8 13.Rc1) 9.Nbd2 (9.Nh4 Bg6 10.Nd2 (10.f4 a5 11.Nc3 b5 12.Ng6 hg6 13.e4; 10.c4 dc4 11.dc4 0–0–0 12.Qa4 Kb8 13.Rd1) 10...a5 11.Nb3 ab4 12.ab4 Ra1 13.Qa1) 9...e5 10.c4 0–0 11.e4 (11.c5 Bc7= 12.Qc2 Bg4 13.h3) 11...de4+= 12.Nh4 Be6 13.de4 Bc7 14.Qc2 Rfd8 (14...c5 15.b5=) 15.c5 Ne4 16.Qe4 Nc5 17.bc5 Rd2 18.Bc3 Bd5 (18...Re2!? 19.Qe2 Qh4+=) 19.Nf5+/– Qf6 (19...Be4? 20.Ne7 Kf8 21.Bd2 Ke7 22.Rad1+–; 19...Qc5?? 20.Qg4 Qf8 21.Bd2+–) 20.Qb1 Re2 21.Ng3 Ra2 22.Ra2 Ba2 23.Qa2 b6 24.f4! Re8 25.Be5 Qe7 26.Bc7 Qc7 27.Qc2 bc5 28.Qc5 Re6 29.Nf5 Qb6 30.Qb6 ab6 31.Rd1 h6 32.Kf2 Re4 33.Rd4 Re8 34.Rd6 Re4 35.g3 Ra4 36.Rc6 Ra3 37.Rb6 Ra2 38.Kg1 Ra7 39.Kg2 h5 40.Nd6 f6 41.Rb8 Kh7 42.Rb7 Rb7 43.Nb7 g6 44.Nd6 Kg7 45.f5 g5 46.Ne4 Kf7 47.h4 g4 48.Kf2 Ke7 49.Ke3 Kf7 50.Kd4 Ke7 51.Kd5 Kf7 52.Kd6 (52.Kd6 Ke8 53.Nf6 Kf8 54.Ke6 Kg7 55.Nh5 Kg8 56.Nf6 Kf8 57.Nd7 Kg7 58.f6 Kg8 59.f7 Kg7 60.f8Q Kg6 61.Ne5 Kh7 62.Qf7 Kh6 63.Ng4#) 1–0. Pommerel,Wim – Van Esbroeck,Jeff, corr TKM/A001, 1999.

6.Be2 e6 7.0–0 Bd6 8.Nh4 Bg6 9.f4 Ne4 10.Ng6 hg6 11.d3 Qh4 12.de4 Qh2 13.Kf2 g5 14.ed5 gf4 15.Bf3 cd5 16.ef4 Bf4 17.Qd3 Be5 (17...a6 18.Ke1=+) 18.Be5 Ne5 19.Qb5 Kd8 20.Nd2 Qf4 21.Ke2 Rc8 22.Bd5 Qg4 23.Bf3 Nf3 24.Nf3 Qg2 25.Ke1 Rc2 26.Rd1 Kc8 27.Qd7 Kb8 28.Qd6 Ka8 29.Qd8 Rc8 30.Qd2 Qg3 31.Ke2 Qg4 32.Rc1 e5 33.Qg5 Qe4 34.Kf2 Rc2 35.Rc2 Qc2 36.Kg1 e4 37.Nh4 Qc7 38.Rc1 Qb6 39.Rc5 a6 40.Qe3 Qe6 41.Ng2 Rd8 42.Qf4 f6 43.Ne3 Rd3 44.Rh5 Qc8 45.Ra5?? Qc1–+ (46.Kg2 Re3–+) 0–1. Coltharp,Cameron – Pommerel,Wim, email 4AMM–F, 1998.

6.Be2 e6 7.d4 Bd6 (7...a5 8.b5 cb5 9.Bb5 Qc7+=) 8.Nbd2 b5 9.Ne5 (9.Nb3=) 9...Qc7 10.g4 Be4 (10...Ne5? 11.de5 Be5 12.Be5 Qe5 13.gf5 Qf5 14.Bd3+/–) 11.f3 (11.Ne4 de4 (11...Be5? 12.de5 Ne4 13.f3+=) 12.g5+=) 11...Bg6 (11...Ne5 A) 12.Ne4? Nf3 (12...de4?! 13.de5 Be5 14.Be5 Qe5 15.Qd4 Qd4 16.ed4–/+) 13.Bf3 Ne4–/+; B) 12.fe4?! Ng6=; C) 12.de5 Be5 13.Be5 Qe5 14.fe4 Ne4 15.Ne4 Qe4 16.Kf2+/–; 11...Be5? A) 12.Ne4 de4 (12...Ne4 13.de5 Ng5 14.h4+/–) 13.de5 Ne5+=; B) 12.de5! Bf3 13.Nf3 Ng4 14.Qd4+/–) 12.f4 (12.g5 Ng8 (12...Ne5 13.gf6 Nd7 14.fg7+=) 13.Ng6 hg6 14.Nf1+=) 12...Be4 (12...Nb6=) 13.0–0 h6 14.Ne4= (14.a4 ba4 15.Nd7 Nd7 16.c3+=) 14...Ne4 15.Nd7 Qd7 16.Bf3= (16.Bd3+=) 16...0–0 17.Qd3+= (17.Be4 de4 18.g5=) 17...f5 18.gf5 ef5 19.Be4–/+ (19.a4!?+=) 19…fe4 (19...de4?! 20.Qb3 Kh7 21.c4=) ½–½. Oestblom,Stig – Lindberg,Rune, Nordisk Cup II, 1992.

5.a3 e6

6.Nc3 Bd6 7.Be2 h6 8.Nd4 Bg6 9.f4 Nbd7 10.0–0 0–0 11.Bd3 Bd3 12.cd3 a5 13.b5 c5 14.Nf3 e5 Black plans d4 15.Qb3 a4 16.Qa2 d4 17.Ne4 Ne4 18.de4 Ra5 19.Qd5 Qe7 20.Qc4 (better is 20.fe5!? Ne5 21.ed4 Nf3 22.Rf3 Rb5 23.Bc3+=) 20...ef4–/+ 21.ed4 Qe4 22.Rae1 Qg6 23.Ne5 Be5 24.de5 Qe6 25.d3 g5 26.Bc3 Raa8 27.Qe4 Nb6 28.h4 Rad8 29.Rf3 Nd5 30.Bd2 Rfe8 31.Qa4 Nc7 32.hg5 hg5 33.Rh3 Qg6 The backward pawn on d3 becomes a target 34.Qe4 Qe4 35.Re4 (35.de4?? Rd2 36.g3 f3–+) 35...Nb5 36.Ba5 Rd5 37.Rh5 Nd4 38.Rg5 Kf8 39.Rh5 Ne6 40.Bd2 Rd3 41.Bf4 Ra3 42.Bg5 Rea8 43.Bf6 Ke8 44.Rh8 Kd7 45.Rh7 b5 46.Rf7 Kc6 47.Re7 b4 48.Rh4 (48.Re1 Nd4 49.Rf7–+) 48...Nd4–+ 49.Rhh7 Rb8 (49...b3!? 50.Rb7 Ra2 51.Rhc7 Kd5 52.Rd7 Kc4 53.e6 Ne6 54.Re7–+) 50.Rc7 Kb6 51.Be7? (better is 51.e6 Ne6 52.Rce7–+) 51...Rc3 (51...Kc7?! 52.Bc5 Kc6 53.Bd4–+) 52.Rd7 b3 53.Rd8? (53.Bd8 Kc6 54.Rd6 Kb5 55.Rhh6–+) 53...Rc1 (53...Rd8!? 54.Bd8 Kc6 55.Rc7 Kd5 56.Rb7–+) 54.Kh2 Rd8 55.Bd8 Kc6 56.Rc7 Kd5 57.Rb7 Ke5 58.g4 (58.Rb6 c4 59.Bf6 Ke4–+) 58...Rc2 59.Kh3 b2 60.g5 (60.Kh4 c4 61.Bc7 Ke4 62.Rb2 Rb2–+) 60...Rc3 61.Kg4 Nb3 62.Bf6 Kd5 63.Bc3 b1Q 64.Bg7 Qe4 65.Kg3 (65.Kh5–+) 65...Nd4 66.Bd4 cd4 (66...Qd4?! 67.Rd7 Ke5 68.Rd4 cd4 69.g6=) 67.Ra7 d3 68.Ra2 Qe3 69.Kg2 (69.Kh2 d2 70.Rd2 Qd2 71.Kg3 Ke4 72.g6 Qg5 73.Kf2 Qg6 74.Ke2 Qg2 75.Ke1 Kd3 76.Kd1 Qd2) 69...d2 70.Ra5 Ke4 71.Ra4 Qd4! 72.Rd4 (72.Rd4 Kd4 Combination) 72...Kd4 73.g6 (73.Kf3 d1Q 74.Kf2 Qd2 75.Kg1 Ke4 76.Kh1 Kf3 77.g6 Qg2) 73...d1Q 74.g7 (74.Kf2 Qg4 75.g7 Ke4 76.g8Q Qg8 77.Ke2 Qa2 78.Kd1 Kd3 79.Ke1 Qe2) 74...Qg4 75.Kf2 Qg7 76.Kf3 Qg5 77.Kf2 Ke4 78.Kf1 (78.Ke1 Qg2 79.Kd1 Kd3 80.Ke1 Qe2) 78...Ke3 79.Ke1 Qg1 0–1. gambitqueen17 (2345) – forsetinn (2365), gameknot.com, 2015.

6.d3 Nbd7 7.Be2 h6 8.0–0 Bh7 9.h3 Nh5 10.c4 f6?? (better is 10...Nhf6+=) 11.cd5 (11.Nd4 Ng3 12.fg3 e5+–) 11...cd5 (11...ed5 12.g4 Bd6+–) 12.Nbd2 (better is 12.Nd4!? Ng3 13.fg3 e5+–) 12...e5? (12...g6 13.Rc1+/–) 13.Nb3 (better is 13.g4+–) 13...e4?? (better is 13...g6+/–) 14.de4 (14.Nfd4!? Ng3 15.fg3 Qb8+–) 14...de4 15.Nfd4 Ne5 16.Bh5 Bg6 17.Bg6 Ng6 18.Nc5 Bc5 19.bc5 0–0 20.Qb3 Kh7 21.Ne6 Qd3 22.Qd3 ed3 23.Nf8 Rf8 24.Rfd1 Rd8 25.Rd2 Ne5 26.Rad1 Nc4 27.Rd3 Nb2 28.Rd8 Nd1 29.Rd1 Kg6 30.Rd7 b6 31.cb6 ab6 32.Rb7 b5 33.Rb5 f5 34.a4 Kg5 35.a5 h5 36.a6 h4 37.a7 g6 38.a8Q Kh6 39.Qh8 Kg5 40.Qh7 Kf6 41.Qh4 g5 42.Qh6 Kf7 43.Rb7 Kg8 44.Qg7 1–0. Fournier,Frederic (1945) – conor666 (1910), Echecs21 (1/1), 2003.

6.Be2 Bd6 =.

6.Be2 Nbd7 7.Nh4 Bg6 8.0–0 a5 9.b5 Bd6 10.f4 Nb6 11.Nc3 Rb8 12.f5 Qc7 13.h3 ef5+= 14.Nf5 Bf5 15.Rf5 0–0 16.Rf6 gf6 17.Bd3 f5 18.Bf5 f6 19.d3 Bc5 20.Qf3 Rbe8 21.Re1 Qe7 22.bc6 bc6 23.Nb1 Qc7 24.Nd2 Bd6 25.Rb1 Bc5 26.d4 Bd6 27.e4 Kh8 28.Rf1 Qg7 29.g4 a4 30.Kh1 Qc7 31.Qe3 Rg8 32.Rf2 Qg7 33.Kg2 Rb8 34.Qf3 Qe7 35.Kg1 Na8 36.Bc1 Nc7 37.ed5 cd5 38.Kg2 Qe1 39.Rf1 Qh4 40.c4 h5 41.Qf2 Qf2 42.Rf2 Bf8 43.cd5 hg4 (44.hg4 Nd5=; 43...Nd5 44.Be6 Ne3 45.Kf3+=). Schulz,Hans_Juergen (2145) – Lisakowski,Christof (1960), RS6D – A00 – Sokolsky Alt–1, 2004.

6.h3 a5 7.ba5 Ne4 (7...Bd6 8.g4 Be4 9.Nc3+=) 8.g4 Bg6 9.d3 (9.h4 Nc5=) 9...Qa5+= 10.Nbd2 (10.Nfd2 Nc5+=) 10...Nc3 11.Qc1 Na4 12.Nd4 (12.Bd4 c5 13.Be5 Nc6+=) 12...Nd7 (12...Nb2 13.Qb2 b5 14.N4b3–/+) 13.h4 (13.N4b3 Qd8–/+) 13...h5 (13...Nb2 14.Qb2 e5 15.N4f3–/+) 14.N4b3 Qc7 15.g5 Nb2 16.Qb2 Bd6 17.Bg2 (17.c4 0–0–/+) 17...0–0 18.a4 Ra6 19.Ke2 (19.a5!?–/+) 19...b6–+ 20.Ra2 Rfa8 21.Rha1 R6a7 (21...R8a7 22.Ke1–+) 22.d4 (22.Qc3 Be5 23.d4 Bd6–/+) 22...Be7 (22...e5 23.c4 e4 24.cd5 cd5 25.f3–/+) 23.f4 Bf5 24.Kf2 b5 (24...Bb4 25.c4–/+) 25.ab5 (25.a5 Bb4–/+) 25...Ra2 26.Ra2 Ra2 27.Qa2 cb5 28.Bf1 b4 29.Be2 g6 30.Bd3 Bd3 31.cd3 Kg7 32.Qa6 Bd6 33.Ke2 ½–½. Rohde,Friedhelm – Brzoza,Miroslaw, corr 3GMM–21, 1996.

6.h3 a5 7.b5 Bd6 +=.

6.h3 h6 7.c4 a5 8.cd5 ed5 9.b5 Bd6 10.Be2 0–0 11.0–0 Re8 12.Re1 c5 13.d3 b6 14.Nbd2 Qc7 (better is 14...Nbd7!?=) 15.e4+/– Bd7 (15...de4 16.de4 Decoy) 16.Bf6 gf6 17.ed5 Bb5 18.Ne4 Nd7 19.Nh4 Rad8 (19...Bh2!? 20.Kh1 Be5+/–) 20.Bh5+– (20.Nd6?! Qd6 21.Qb3 Ba6+/–) 20...Kf8 21.Nf5 (21.Nd6?! Re1 (21...Qd6? 22.Qd2 f5 23.Nf5 Re1 24.Re1+–) 22.Qe1 Qd6=) 21...Bh2 22.Kh1 Bf4 23.d6 (23.d6 Qc8 24.Qf3+–) 1–0. Taulien,Hans_Juergen (2350) – Spieler,Schach (2260), RSS5D pro–31, 2004.

6.Nh4 Bg6 7.Ng6 hg6 8.d4 Bd6 9.h3 Nbd7 10.Nd2 b5 11.Nb3 Nb6 12.Nc5 a5 13.Nb7 Qe7 14.Nd6 Qd6 15.c3 Ne4 16.Bd3 f5 17.Qc2 Qe7 18.Rc1 Qg5 19.Kf1 Nd6 20.Re1 Nbc4 21.Bc1 Qe7 22.f3 Qh4 23.Re2 ab4 24.ab4 (24.cb4 Rd8+=) 24...Ra1–/+ 25.Re1 0–0 26.Bc4 Nc4 27.Qf2 Qe7 28.g3 Rfa8 29.Kg2 R8a2 30.Re2 Qa7 (30...Re2 31.Qe2 Qa7 32.Rd1–+) 31.Bd2 Qa4 32.Ra1 Ra1 33.Be1 Qd1 34.g4 (34.e4!?+=) 34...g5 35.Kg3 (35.gf5 ef5 36.e4 f4–/+) 35...Qc1 (35...Ne3 36.gf5 ef5 37.f4 gf4 38.Kf4–/+) 36.gf5 ef5 37.Kg2 Qd1 38.Kg3 Ne3! 39.f4 gf4 40.Kf4 Nc4 41.Kf5 Qd3 42.Kg5 Ra8 43.Re7 Rf8 44.Qe2?? Qf5 45.Kh4 Rf6 46.Kg3?? Nd6 47.Kh2+= Ne4 48.Qg4 Qg4 49.hg4 Rf1 50.Bg3 Rf3 51.Be5 g5 52.Bc7 Rc3–+ 53.Bb6 Rc4 54.Re6? Kf7 55.Rh6 Nf6 56.Kh3 Rb4 0–1. Endara,Nino – Aguirre,Francisco, ECU–ch Pichincha, 1962. (=1.Nf3 d5 2.b4 c6 3.a3 Nf6 4.Bb2 Bf5 5.e3)

5.a4 Nbd7

6.c4 Qc7 7.Nc3 e5 8.cd5 Bb4 (worse is 8...cd5 9.Rc1 Qd8 10.Nb5+/–) 9.dc6 bc6 10.Qb3 (10.Bc4 Nb6 11.Be2 Rb8=) 10...a5 11.Rc1 Nc5 12.Qc4 (12.Qd1 Bd3 13.Nb5 cb5 14.Rc5 Qc5 15.Bd3 ba4 16.Qa4 Kf8 17.Ne5 Re8=) 12...Rd8 (12...Nfd7 13.Nd1–/+) 13.Be2 (13.Na2 Bd3 (13...Na4 14.Be5 Qb7 15.Nb4 ab4 16.Qf4+–) 14.Be5 Bc4 15.Bc7 Ba2 16.Bd8 Kd8–/+) 13...Ng4 (13...Bd3!? 14.Qh4 Qd6–/+) 14.Qa2 e4 (14...Bd3 15.h3 Nf6 16.0–0–/+) 15.Nd4+= Rd4 (15...Qd7 16.0–0 Qd6 17.Bg4 Bg4 18.f3 ef3 19.Nf3+=) 16.ed4 Nd3 17.Bd3 ed3 18.h3 Nh2?? (18...Bc3 19.hg4 Qe7 20.Kf1 Bd2–/+) 19.Nd5+/– Qd6 20.Ne3 (20.Nb4?? Qe7 21.Qe6 Qe6 22.Kd1 Qe2) 20...Qf4 21.Qc4 Be4? (better is 21...0–0 22.Bc3 Be4=) 22.d5+– The mate threat is Qxc6 22...0–0 23.Nf1?? (better is 23.Qd4 f6 24.Rh2+– (24.dc6?? Nf3 25.Kf1 Nd4 26.Bd4 Bd2–+)) 23...Nf3!–+ 24.gf3 Qf3 A double attack. Threatening mate: Qe2 25.Ng3 Bd5 26.Qg4 (26.Qd5 Qd5 27.0–0 Bd2 28.Rcd1–+) 26…Re8 (26...Re8 27.Be5 Re5 28.Qe4 Re4 29.Kf1 Bd6 30.Rh2 Bg3 31.Rb1 Qe2 32.Kg1 Bh2 33.Kh2 Qf2 34.Kh1 Ra4#) 0–1. Meissner,Herbert – Strohbach,Guenther, corr DDR/H/53, 1965.

6.d4 e6+= 7.b5 Bb4 8.c3 Ba5 9.Be2 0–0 10.0–0 Rc8 11.Qb3 c5 12.c4 dc4 13.Bc4 Ne4 14.Rc1 Re8 15.Nc3 Nd6 16.Be2 h6 17.Nd1 Ne4 18.Ba3 g5 19.h3 Bb6 20.Bb2 Qe7 (20...g4 21.hg4 Bg4 22.Qd3=) 21.a5+= Bc7 22.Nc3 b6 23.ab6 ab6 24.Ne4 Be4 25.dc5 Nc5 26.Qc3 f6 27.Ra7 (worse is 27.Qf6 Qf6 28.Bf6 Nb3 29.Rc7 Rc7+=) 27...Kf7 (27...Bh2 28.Nh2 (worse is 28.Kh2 Qa7 29.Qf6 Kh7=) 28...Qa7 29.Qf6+/–) 28.Nd4 (better is 28.Nd2!? Bg6 29.Rca1+/–) 28...Bh2= 29.Kh2 Qa7 30.Bh5 Bg6= 31.Nc6 Qc7 32.Kg1 e5 33.Bg6 Kg6 34.Ra1 Ra8 35.Rd1 Re6 36.f4 ef4 37.ef4 Qf4 38.Rd7?? Qe3 39.Qe3 Re3 40.Rd6 Rf8 41.Ne7?? Kh5 42.Nd5?? Re6–+ 43.Re6 Ne6 44.Nf6 Kg6 45.Nd7 Rf5 46.Ne5 Kh7 47.g4 Rf4 48.Nd7 Rb4 49.Be5 Rb5 0–1. Grube,Joerg (1790) – Yanik,Mehmet (1930), Dortmund9, 2003.

6.Nh4 Bg4 7.f3 Be6 +=.

5.c4 Nbd7

6.a3 e6 =.

6.a4 e6 7.b5 Bb4 8.Be2 0–0 9.0–0 dc4 10.bc6 bc6 11.Bc4 Nb6 12.Be2 c5 13.d4 (13.Nc3 Nbd5+=) 13...cd4 14.Nd4 Be4 15.Qb3 Ba5 16.Qb5 (16.Nc3!? Bc3 17.Bc3=) 16...Nbd7+= 17.Ba3 Rb8 18.Qa6 Bb7 19.Qd3 (19.Qa7? Bb6 20.Qb8 Nb8 21.Bf8 Bd4–+) 19...Re8 20.Nc3 a6 (20...Ne5!? 21.Qc2 Rc8–/+) 21.Rab1 Nb6 (21...Ne5 22.Qc2=) 22.Bc5 (22.Bb4 Nbd5 23.Ba5 Qa5=) 22...Nbd5 (22...Qc7 23.Bb4 Bb4 24.Rb4–/+) 23.Na2 (23.Nd5!? Qd5 24.Bf3 Qc5 25.Bb7+/–) 23...Qd7+= 24.Bd1 (24.Rfc1!?+=) 24...Rec8 25.Ba3? (better is 25.Nb3 Bb6 26.Bb6 Nb6 27.Qd7 Nfd7 28.Nd2–/+) 25...Nc3–+ 26.Ra1?? (26.Rb7 Qb7 27.Bf3–+) 26...e5 (26...e5 27.Qf5 Nd1 28.Qd7 Nd7–+) 0–1. algernon (2510) – pops (2455), net–chess.com, 2015.

6.a4 e6 7.b5 dc4 8.bc6 bc6 +=.

6.a4 e6 7.b5 Bd6 8.Nd4 +=.

6.a4 e6 7.c5 a5–/+ 8.d4 (8.Nh4 Bb1 9.Rb1 ab4 10.d4–/+) 8...Bb1 (8...ab4 9.Be2–/+) 9.Qb1 (9.Rb1 ab4 10.Bd3 b6 11.cb6 Qb6+=) 9...ab4+= 10.Bd3 Qa5 (10...Be7 11.Bc1+=) 11.0–0 (11.Nd2 b6 12.Nb3 Qa7 13.cb6 Nb6=) 11...h6 (11...Be7 12.Qc2+=) 12.Nd2= Qc7 (12...Be7 13.Nb3 Qc7 14.Qe1=) 13.f3 (13.e4 de4 14.Ne4 Nd5=) 13...Be7 14.Qe1 (14.Bc1 b6 15.Qb4 bc5–/+) 14...b6 (14...0–0 15.Nb3=) 15.cb6 =. Piron,Jean Marie – Ruf,G, BEL–FRA, 1993.

6.Nc3 e5 7.b5 Bg4 8.Qc2 Bf3 9.gf3 d4 10.Ne4 c5 11.f4 Qc7 (11...de3 12.de3 ef4 13.0–0–0+=) 12.fe5 Qe5 13.Bg2 Ne4 (13...0–0–0 14.0–0+=) 14.Qe4 (14.f4 Qe7 15.Qe4 Qe4 16.Be4 0–0–0+/–) 14...Qe4+= 15.Be4 de3 (15...0–0–0!?+=) 16.Bb7+/– ed2 17.Kd2 Rb8 18.Bc6 f6 (better is 18...Kd8+/–) 19.Kc2+– Rc8 20.Rad1 Rc7 (20...Rc6 21.bc6 Nb6+–) 21.Rd7 (21.Rd7 Rd7 22.Rd1+– (22.Bd7?! Kd7 23.Rg1 h5+/–)) 1–0. Ladeira,P Ribeiro Soare – de Jongh Puentes,A, IECC, 2013.

6.Nc3 e6 7.Qb3 Be7 (7...a5 8.ba5 Qa5 9.d4+=) 8.Be2 (8.cd5 ed5 9.Nd4 Bg6+=) 8...0–0 (8...dc4 9.Bc4 Nb6 10.Be2+=) 9.0–0 Bg6 (9...dc4 10.Qc4 Nb6 11.Qb3+=) 10.a4 (10.d3 dc4 11.dc4 Qc7=) 10...b6 (10...a5 11.b5=) 11.Nd4 (11.cd5 cd5 12.Ba6 Qb8=) 11...Qc7 (11...dc4 12.Bc4 Ne5 13.Be6=) 12.cd5= ed5 13.Rac1 a6 (better is 13...Qd6!?=) 14.Nd5!+/– Nd5 (14...cd5 A pinning theme 15.Rc7) 15.Qd5 Qh2 (15...cd5 A pinning theme 16.Rc7) 16.Kh2 cd5 Annihilates a defender: d5 17.Rc7?? (17.f4 Bd6 18.Bg4+=) 17...Bd6–+ 18.f4 Bc7 19.Rf3 Nf6 20.Kg1 Bd6 21.d3 Rfe8 22.Rg3 Kh8 23.Rh3 h6 24.g4 Kg8 25.Rg3 White prepares the advance g5 25...Bb4 26.f5 Bh7 27.g5 hg5 28.Rg5 Rac8 29.e4 de4 30.de4 Bc5 31.Kg2 Re4 32.Bf3 Bd4 33.Be4 Bb2 (33...Bb2 34.Bb7 Rc5 35.Ba6 Bf5–+; 33...Ne4 34.Bd4 Ng5 35.Bb6 Bf5 36.Be3 Rc2 37.Kg3–+) 0–1. Thome,Volker – Schindler,Robert, Baden–ch AT Waldshut, 1991.

6.Nc3 e6 7.b5 Bd6 8.Nh4 Bg6 9.Ng6 hg6 10.a4 Qe7 (worse is 10...Bh2 11.bc6 bc6 12.cd5 cd5 13.g3+/–; worse is 10...Rh2 11.Rh2 Bh2 12.g3+/–) 11.h3 e5 (11...0–0 12.Be2=) 12.bc6 bc6 13.cd5 cd5 14.Nb5 Bb8? (better is 14...0–0 15.Nd6 Qd6=) 15.Qc2 Kd8? (better is 15...Nb6 16.a5 Nc4 17.Bc4 dc4 18.Qc4 Qe6 19.Qe6 fe6+–) 16.Ba3 Qe6 17.Be2 (17.Rc1 Nb6 18.Nc7 Qc8 19.Na8 Qc2 20.Rc2 Na8+–) 17...Rh4? (better is 17...Nb6+/–) 18.Rc1+– Nb6 (18...Rc4 19.Bc4 dc4 20.Qc4 Qc4 21.Rc4 Nb6+–) 19.Nc7 Bc7 (19...Qd7 20.Na8 Na8+–) 20.Qc7 Ke8 21.Rc6 (better is 21.Bb5 Nfd7 22.Rc6 Rc4 23.Re6 fe6+–) 21...Qd7 22.Qe5 (22.Qe5 Kd8 23.Rd6+–) 1–0. Koerner,He (1935) – Hesselbarth,K (1790). Berlin GER, 2012.

6.Nc3 e6 7.c5 b6 8.d4 bc5 9.dc5 Rb8 10.a3 a5 (better is 10...Bc5 11.Ne2 Be7+=) 11.Qb3?? (better is 11.Nd4 Qc7 12.Nf5 ef5 13.Na2+=) 11...Nc5!–+ 12.Qd1 (12.bc5 Rb3 Pinning (12...Rb3 Deflection)) 12...ab4 13.ab4 Rb4 14.Ba3 Rb8 15.Bc5 (15.Nd4 Qa5 16.Qc1 Nb3 17.Nc6 Qc7–+ (17...Nc1?! 18.Na5 Nd3 19.Bd3 Bd3 20.Kd2 Ba3 21.Ra3–/+)) 15...Bc5 16.Bd3 Bb4 17.Qc2 Ne4 18.Be4 Be4 19.Qd2 Qf6 20.0–0 Bc3 21.Qc1 0–0 22.Ra2 Qg6 23.Nh4 Qf6 24.Nf3 Rb1 25.Qa3 h6 26.Rc1 Bb2 27.Rb2 Rc1 (27...Rc1 28.Ne1 Re1#) 0–1. Hoehne,Marcus – Kube,Daniel, Berlin–ch U16, 2004.

6.Nc3 e6 7.cd5 cd5 8.a3 a5 =.

6.c5 Bb1 7.Qb1 e6 8.Be2 Be7 9.Be5 (9.0–0 b6+=) 9...Ne5= 10.Ne5 Nd7 11.Nd7 Qd7 12.d4 0–0 13.0–0 Bf6 14.f4 g6 15.a4 b6 16.Qd3 Rab8 17.Rfb1 bc5 18.bc5 a5 (18...Qc7 19.g4=) 19.Ra2 (better is 19.Qa6 g5 20.g3+/–) 19...Bd8?? (19...Qc7 20.Rab2 Rb2 21.Rb2+=) 20.Rab2 (better is 20.Rb8 Bc7 21.Rb7+–) 20...Bc7 21.Rb8 Rb8 22.Rb8 Bb8 23.Qa6 Qc7 24.Qa8 Kf8 (24...g5 25.g3 gf4 26.ef4+/–) 25.Ba6+/– Ke7 26.Kf2 (26.Bb7 g5 27.g3 gf4 28.ef4 Kf6 29.Bc6 h6+–) 26...Kd7 (26...g5 27.g3 gf4 28.ef4+/–) 27.Kf3 (27.Bb7!?+/–) 27...Qa7 28.Qa7 Ba7 29.g4 Bb8 30.h3 (30.g5 Bc7+=) 30...Bc7 (30...f6 31.h4+=) 31.e4 (31.g5 Bd8+=) 31...de4 32.Ke4 ½–½. Chirpii,Alexandru – Proorocu,Doina, Centrocoop June op–A, 1999.

6.c5 Ne4 =.

6.c5 e6 7.a3 =.

6.c5 g6 7.h3 (7.Be2 a5 8.a3 Bg7=) 7...Qc7 (7...Bg7 8.d3=) 8.g4 Bb1 9.Rb1 Bg7 10.g5 Nh5 11.Bg7 Ng7 12.d4 0–0 (12...e5 13.b5=) 13.h4 (13.Be2 e5=) 13...f5 14.Bd3 (14.b5 f4 15.Qd3 fe3 16.Qe3 e5 17.Ne5 Ne5 18.de5 Rae8+=) 14...e5 15.de5 Ne5 16.Ne5 (16.0–0 Nd3 17.Qd3 Ne6=) 16...Qe5+= 17.Qc2 (17.Qd2 f4+=) 17...Rae8 (17...f4 18.Qb2 Qe6 19.Qe2–/+) 18.Qb2 Qe6 19.Rc1 (19.Qb3 f4 20.e4 Qe5+= (20...de4?? 21.Bc4+–)) 19...f4 20.e4 Qg4 (20...de4?? 21.Bc4+–) 21.Kd2 (21.Qc3 Rf7–/+) 21...Qf3 (21...de4 22.Bc4 Kh8 23.Rcg1 e3 24.Kc1–+) 22.ed5 (22.Rcf1 de4 (22...Re4?! 23.Be4 de4 24.Qb3 Qb3 25.ab3=) 23.Bc4 Kh8–/+) 22...Qf2 23.Kc3 Qb2 24.Kb2 cd5 25.a3 f3–+ 26.Rcf1 Re3 27.Kc2 Nh5 28.Rh2 Ng3 29.Rff2 Ne4 30.Be4 de4 31.Rh1 a5 32.b5 Rf5 33.c6 Rc5 34.Kd2 Rd3 35.Ke1 If White now only could play Rb2... 35...Rc1# 0–1. Thomas,ARB – Green,Arnold Yorvath, York BCF–ch, 1959.

6.d4 e6 7.c5 Be7 8.Be2 0–0 9.0–0 Rb8 10.a4 (10.Nh4 Bb1 11.Rb1 b6=) 10...b6+= 11.cb6 ab6 (11...Qb6 12.b5+=) 12.b5= c5 13.Nc3 Qc7 14.Nh4 Bg6 15.Ng6 fg6 16.f4 cd4 (16...c4 17.Bg4 Ng4 18.Qg4=) 17.ed4 Bd6 18.Rc1 Qb7 19.g3 Rbc8 20.Qd3 (20.Re1 Rfe8+=) 20...Rf7 21.Bf3 Qa7 (21...Qa8 22.Rfe1 Nf8 23.Qd1=) 22.Rfe1 (22.Nd5 Rc1 23.Nf6 gf6 24.Rc1 Qa4+–) 22...Nf8? (22...Re8!?+=) 23.Nd5+/– Rc1 24.Nf6 gf6 25.Rc1 Rc7 (25...Qa4!? 26.Rc6 Rd7+/–) 26.Rc7+– Qc7 27.Qc3 Nd7 (better is 27...Qd8+–) 28.Qc6 Nb8 (28...Nf8 29.Ba3! Qc6 30.bc6+–) 29.Qe8 Kg7 30.Qe6 Qc2 (30...Bb4+–) 31.Qd6 Qb1 32.Kg2 Qc2 (32...Qb2 33.Kh3 Qa2 34.Qb8+–) 33.Kh3 Qf5 (33...Qc8 34.Bg4 Qf8 35.Qc7 Kh6+–) 34.Bg4 (34.Bg4 Qb1 35.Qe7 Kg8 36.Be6 Kh8 37.Qf6#) 1–0. Stiefel – Kraetschmer, Staufen–op Schwaeb.Gmuend, 1995.

6.cd5 cd5 7.a3 e6 8.d4 Be7 9.Bd3 Bd3 10.Qd3 Ne4 11.Nbd2 Ndf6 12.0–0 0–0 13.Ne4?? (13.Ne5 a5=) 13...Ne4?? (better is 13...de4 14.Qe2 ef3 15.Qf3 Qd5–+) 14.Nd2 f5 15.Rac1 Bg5 16.Nf3 Qf6 17.Ng5 Ng5 18.f3 Qg6 19.Rc2 h6 20.Kh1 Rac8 21.Rfc1 Rc2 22.Rc2 Rf7 23.Rc8 Kh7 24.Qc2 Qf6 25.Rc7 a6 26.Rf7 Qf7 27.Qc5 Qd7 28.h3 Nf7 29.Bc1 Qc6 30.Qc6 bc6 31.Kg1 Nd6 32.Kf2 Nc4 33.Ke2 g5 34.g4 fg4 35.fg4 Kg6 36.Kf3 Kf6 37.Ke2 e5 38.Kf3 (38.de5!? Ke6 39.Kd3=) 38...e4 39.Ke2 ½–½. Fournier,Frederic (1730) – locodelrock, Active, 2006.

6.cd5 Nd5 7.a3 e6 8.Nc3 Nc3 9.Bc3 Nf6 10.b5 Ne4 11.bc6 Nc3 12.Qc1 Ne4 13.c7 Qd7 14.Ne5 Qd2 15.Qd2 Nd2 16.Bb5 (worse is 16.Kd2 Bd6 17.Rc1 Rc8–/+) 16...Ke7 17.Rc1 (17.Kd2 g6 18.Rac1 Bg7+/–) 17...Ne4 (17...Nb1 18.c8Q Rc8 19.Rc8 g5+/–) 18.c8Q+/– Rc8 19.Rc8 Nd6 20.Rc7 Kf6 21.f4 g5 22.Be2 gf4 23.ef4 Be7 (23...Bh6 24.g4 Bf4 25.Nd7 (25.gf5?! Ke5 26.fe6 Ke6+=) 25...Ke7 26.Nc5 (26.gf5 Kd8=) 26...Kd8 27.Rd7 (27.gf5? Kc7 28.fe6 Be3–+) 27...Kc8 28.gf5 ef5 29.Bd3+–) 24.0–0 (24.Bf3 h5+/–) 24...Rc8 25.Rd7 Rc2 (25...Ne4 26.g4 Bc5 27.Kg2+–) 26.Bd1+/– Ra2 27.Bf3 Ra3? (better is 27...h5+/–) 28.g4+– (28.g4 h6 29.gf5 Nf5 30.Rb7+–; 28.Bb7?! Nb7 29.Rb7 Ra2=) 1–0. Baumann,Heinz – Steingraeber,Barbara, remoteschach.de, 2003.

6.Be2 dc4 7.Bc4 e6 8.a3 +=.

6.Be2 Qc7 7.a4 (7.Nh4 Bb1 8.Rb1 e5=) 7...e5+= 8.b5 Bd6 9.Ba3 0–0 (9...cb5 10.Bd6 Qd6 11.ab5 dc4 12.Na3+=) 10.Bd6 Qd6 11.d4 Qb4 (11...cb5 12.de5 Ne5 13.cb5 Nf3 14.Bf3+=) 12.Qd2= Qd6 (12...Qe7 13.bc6 bc6 14.0–0=) 13.c5 (13.Nc3 Ne4 14.Ne4 Be4=) 13...Qc7 14.0–0 e4 15.Ne1 Ng4 (15...b6 16.cb6 ab6 17.Nc3=) 16.Bg4 Bg4 17.Nc3 f5 18.f4 (18.a5 Nf6+=) 18...Rf6 19.Nd1 (19.a5 Rg6=) 19...Raf8 20.Nf2 Bh5 21.Ra2 (21.Nc2 Rg6=) 21...h6 (21...b6 22.Nc2 bc5 23.dc5=) 22.Nh3 (22.Nc2 Rg6=) 22...Bg4 (22...b6 23.cb6 Nb6 24.Nc2=) 23.Nf2 g5 (23...Rg6 24.h3 Bh5 25.Rb2=) 24.Ng4 (24.Nh1!?+=) 24...fg4= 25.g3 (25.Qd1 gf4 26.Qg4 Kh7 27.Rf4 Rf4 28.ef4 Qf4 29.Qf4 Rf4=) 25...gf4 26.Rf4 Rf4 27.gf4 ½–½. Labahn,Wolfgang – Kolbus, Espelkamp, 1980.

6.Be2 e5 7.b5 (7.c5 Qc7=) 7...Bd6 8.d3 (8.d4 e4 9.Nfd2 cb5+=) 8...0–0 9.Nbd2 Nc5 (9...cb5 10.cd5 Bg4 11.Qb3+=) 10.Nb3 (10.bc6 A) worse is 10...Nd3 11.Bd3 Bd3 12.cb7+/– (worse is 12.Be5 bc6 13.Rc1 Re8 14.Bd6 Qd6+=); B) 10...bc6 11.Ne5 Be5 12.Be5 Nd3 13.Bd3 Bd3 14.cd5 Nd5=) 10...Re8 (10...Nb3!? 11.Qb3 dc4 12.Qc4 cb5 13.Qb5 a6+=) 11.Nc5= Bc5 12.0–0 (12.Be5 dc4 13.dc4 Qa5 14.Kf1 Ne4=) 12...e4 (12...d4!?+=) 13.de4= Be4 14.Nd4 (14.Rc1 Qd6=) 14...Bd4 (14...Qd6 15.Nb3 dc4 16.Bc4 (worse is 16.Nc5 Qc5 17.Bf6 gf6–/+) 16...cb5 17.Bb5=) 15.Bd4 dc4 16.Bc4 cb5 17.Bb5 Re6 (17...Bg2 18.Kg2 Qd5 19.Qf3 Qg5 20.Kh1 Qb5 21.Bf6 gf6 22.Rfc1+=) 18.Rc1 (18.f3 Bd5+=) 18...Rd6 (18...Bg2!? 19.Kg2 Qd5 20.Qf3 Qg5 21.Kh1 Qb5=) 19.Qb3 Bd5 20.Qb2 Ne8 21.Bd3 Qg5 22.f3 ½–½. Dluhosch – Weber,Siegfried, Germany, 1985.

6.Be2 e6 7.b5 Be7 8.Nc3 (8.Nd4 dc4 9.bc6 bc6 10.Nf5 ef5 11.Bc4 Rb8+=) 8...c5 (8...dc4 9.Bc4 cb5 10.Bb5+=) 9.Nh4= dc4 10.Nf5 ef5 11.Bc4 Ne5 12.d3 Qc7 13.Ne2 Nc4 14.dc4 0–0 15.0–0 Ne4 (15...Rad8 16.Qc1=) 16.Qc2 (16.Qd5 g6 17.Qe5 Qe5 18.Be5 Rfe8=) 16...Bd6 17.Ng3 Ng3 18.hg3 Be5 19.Rad1 (19.Qf5? Bb2 20.Rad1 Rad8–+) 19...Bb2 20.Qb2 Rfd8 21.Qc2 g6 22.Qa4 b6 23.Rd8 Rd8 24.Rd1 Rd7 25.Qb3 f6 26.a4 Kf7 27.Kf1 ½–½. Kuttruf,Andrei – Wilhelm,Anton (1790), Wuerttemberg–ch U18, 2003.

6.Be2 e6 7.b5 Qa5 8.Nd4 Bb1 (better is 8...cb5!? 9.cd5 Nd5 10.Nf5 ef5+=) 9.bc6+/– Bg6 (9...Ba2?? 10.Bc3 Bb4 11.Bb4 Qb4 12.cd7 (12.Ra2?! bc6 13.0–0 dc4+=) 12...Nd7 13.Ra2 dc4 14.Ra4+–) 10.Bc3 Qc7 (10...Qc5!? 11.cd7 Nd7 12.cd5 Qd5+/–) 11.cd7+– Qd7 12.cd5 Qd5 13.Qa4 Nd7 14.Bf3 Qg5? (better is 14...Qd6+–) 15.Bb7 Rb8 (15...Rd8 16.h4 Qh5 17.g4+–) 16.Bc6 Rd8 17.Ba5 Bd6 18.f4 Bf4 (18...Qh4 19.g3 Qe7 20.Bd8 Kd8 21.Qa7 Nb8+–) 19.ef4 Qe7 (19...Qf4 20.Bd8 0–0+–) 20.Bb4 Qh4 21.g3 Qf6 22.Nb5 (22.Nb5 Qe7 23.Nd6 Kf8 24.Nb7+–) 1–0. Fritz11 – jumbo, casual, 2013.

6.Be2 h6 7.0–0 ½–½. Novkovic,Milan (2400) – Atlas,Dimitry (2290), AUT–chT2W, 1999. (=1.Nf3 d5 2.c4 c6 3.e3 Nf6 4.b4 Bf5 5.Bb2 Nbd7)

5.c4 e6

6.c5 +=.

6.Nd4 =.

5.Bd3 Bd3+=

6.cd3 a5 7.ba5 (7.Bf6 gf6 8.ba5 Nd7 9.Nc3 Qa5 10.0–0 e5 11.h3 Rg8 12.Qc2) 7...Qa5 8.Nc3 Nbd7 9.0–0 e6 10.e4 Be7 11.e5 Nh5 12.d4.

6.cd3 Qd6 7.0–0 (7.a3 Nbd7 8.0–0 e6 9.Bf6 Nf6 10.Nc3 Be7 11.e4 Qc7 12.e5; 7.Qa4 Nbd7 8.Nc3 e5 9.a3 Be7 10.0–0 0–0 11.h3 g6 12.Rac1) 7...Nbd7 8.Ba3 e6 9.b5 c5 10.Nc3 Be7 11.d4 b6 12.Qa4.

6.cd3 Nbd7 7.0–0 (7.Nc3 e6 8.b5 Bd6 9.0–0 c5 10.Qc2 0–0 11.h3 Qa5 12.Rfd1; 7.Na3 e6 8.Qb3 Bd6 9.0–0 0–0 10.Bc3 Qb6 11.h3 e5 12.Rab1) 7...Qb6 (7...e6 8.a3+= a5 9.Nc3 ab4 10.ab4 Ra1 11.Qa1 Bb4 12.Qa7) 8.a3= a5 (8...e6 9.Nc3 Bd6 10.Qc2 0–0 11.Na4 Qc7 12.Nc5) 9.Nc3 (9.Bf6 gf6 10.Nc3 e6 11.Qa4 Rg8 12.g3) 9…e6 =. Holwell,Jim – Andersson,Lars H, corr 3GMM–03, 1994.

6.cd3 e6

7.a3 a5 +=.

7.a3 Nbd7 8.Nc3 Bd6 9.0–0 0–0 10.Qe2 Qb6 11.Rfc1 e5 12.h3.

7.Qa4 Nbd7 8.Nc3 Bd6 9.0–0 0–0 10.Rab1 e5 11.b5 Nc5 12.Qc2.

7.Qb3 Bd6 8.0–0 +=.

7.Qb3 Nbd7 8.0–0 Bd6 9.Nc3 (9.e4 Qc7+=) 9...h6 (9...0–0 10.a3+=) 10.a4 (10.Rfc1 0–0+=) 10...0–0 11.Ba3 Qe7 (11...Rc8 12.d4+=) 12.a5 (12.d4 e5+=) 12...Rfc8 13.h3 (13.d4 Ne4+=) 13...a6 (13...e5 14.e4+=) 14.Rfe1 e5 15.e4 d4 16.Na4 Nh7 (16...Qd8 17.Nb2+=) 17.Nb2 (17.Nc5 Rc7+=) 17...Qf6 (17...Ng5!? 18.Ng5 Qg5+=) 18.Nc4 Be7 19.Qd1 (19.Nh2 Ng5+=) 19...Nhf8 20.g3 (20.Nh2 Qf4+=) 20...Ne6 21.Kg2 (21.Nh2 Ng5+=) 21...Nc7–/+ 22.Rf1 (22.Nh2 Nb5–/+) 22...Nb5 23.Qb3 Re8 (23...c5 24.bc5 Bc5 25.Bc5 Nc5 26.Qb1 Ne4 27.Re1+=) 24.Rfb1 (24.Nh4 Qe6 25.Nf5 Bf8–/+) 24...Rab8 (24...Rac8 25.Rc1–/+) 25.Nh4 g6 26.Nf3 Kg7 27.Ra2 Rh8 28.Bb2 (28.Rc2 Rhd8–/+) 28...g5 (28...Rhc8 29.Rc1–/+) 29.Na3 (29.Rc1 Qe6+=) 29...Nd6 (29...Na3 30.Ba3 Qg6 31.Re1+=) 30.Nc2 h5 (30...Qg6 31.Ncd4 ed4 32.Bd4 f6 33.Qe6–/+) 31.Nfd4 g4 (31...h4 32.Ne2 g4 33.Nf4 hg3 34.fg3 gh3 35.Kh2–/+) 32.h4 (better is 32.f4!? gh3 33.Kg1=) 32...ed4–/+ 33.Nd4 Kh7 34.Nf5 Ne5 35.Qc3 Nf5 36.Qe5 Qe5 37.Be5 Nd6 (37...Ng7 38.Bb8 Rb8 39.f3+=) 38.Bh8 Rh8 39.Rf1 Nb5 40.f3 gf3 41.Rf3 Kg7 (41...Kg6 42.Rb2+=) 42.Rb2 Nd4 43.Re3 Kf6 44.Rb1 Rg8 45.Rb2 Ke6 (45...Bd6 46.Kh3–/+) 46.Kh3 Bd6 47.Rb1 (47.Kg2 Bf4–/+) 47...Rg4 48.Kg2 Be5 49.Kf2 (49.Kh3 f5–+) 49...f5 50.Rh1 Kd6 (50...f4 51.gf4 Rf4 52.Kg2 Rg4 53.Kf2–+) 51.Rg1 (51.Rh3 fe4 52.de4 Nc2–+) 51...f4 52.gf4 Rf4 53.Kg2 Rg4 54.Kf1 Rh4 55.Rg8 (55.Rg6 Kc7–+) 55...Ke7 (55...Nc2 56.Rf3 Rh1 57.Rg1 Rg1 58.Kg1 Bd4 59.Kf1 Nb4 60.Ke2–+) 56.Kf2 (56.Rg5 Kf6 57.Rg8 Bd6–+) 56...Kf7 (56...Nc2 57.Rf3 Rh2 58.Kf1 Nb4 59.Rff8–+) 57.Rg1 (better is 57.Ra8 Rh2 58.Kf1 Rh1 59.Kf2–+) 57...Bd6 58.e5 (58.Rg5 Be7 59.Reg3 Bg5 60.Rg5 Kf6–+) 58...Rf4 (58...Bb4 59.Rb1 Ba5 60.Rb7 Ke6 61.Rb2–+) 59.Kg2 (59.Kg3 Be5! 60.Re5 Rg4 61.Kf2 Rg1 62.Rh5 Rg7–+) 59...Rg4 60.Kf2 Rg1 (60...Bb4 61.Rg4 hg4 62.Re4–+) 61.ed6 Rg7 62.d7 (62.Re7 Kf6 63.Rg7 Kg7–+) 62...Rg8 63.Re5 Rd8 (63...Nc2 64.Rh5 Nb4 65.d8Q Rd8 66.Rh7 Ke6 67.Rb7–+) 64.Rh5 Rd7 65.Rh8 (65.Rc5 Kf6–+) 65...Ke6 (65...Kf6 66.Rh4–+) 66.Re8 (66.Rh6 Ke5–+) 66...Kd5 67.Rf8 (67.Rg8 Rf7 68.Kg2 Nc2 69.Rd8 Ke6 70.Re8 Re7 71.Re7 Ke7–+) 67...Re7 (67...c5 68.bc5 Kc5 69.Rh8–+) 68.Kf1 (68.Rd8 Ke5–+) 68...Ne6 (68...Nc2 69.Rd8 Ke5 70.d4 Ke4 71.d5 cd5 72.b5 ab5 73.Ke2–+) 69.Rf3 Kd4 70.Rg3 Nf4 71.Rf3 Nd3 72.Rf8 0–1. Equinox 3?20 64_bit 4CPU – Chiron 2 64_bit 4CPU, CCRL, 2014.

7.Qb3 Nbd7 8.Nc3 Bd6 9.0–0 0–0 10.h3 Qb6 11.a3 c5 12.Na4.

5.d4 Nbd7

6.c4 e5 7.a3 e4 =+.

6.c4 e6 7.Nbd2 (7.c5!?=) 7...Bb4–/+ 8.a3 (8.Qb3 Qa5–/+) 8...Be7 (8...Ba5 9.Qb3–/+) 9.cd5 (9.Be2 0–0–/+) 9...ed5 (< 9...Nd5 10.e4+/–) 10.Be2 0–0 11.0–0 Ne4 12.Ne4 Be4 13.Bd3 Nf6 14.Be4 Ne4 15.Nd2 Nd2–+ 16.Qd2 Qd6 17.Rfe1 Rfe8 18.g3 Bf8 19.Qd3 Qg6 20.Qd2 Qe4 21.Qe2 g6 22.Rac1 Bg7 23.Qc2 Qc2 24.Rc2 f5 25.Rec1 h6 26.Kh1 Kh7 27.Rg1 Re4 28.Bc1 Ree8 29.Rd1 Red8 30.Rg1 Rac8 31.Rd1 Bf6 32.Rg1 Kg7 33.Rd1 b6–+ 34.Rg1 c5 35.dc5 bc5 36.Bd2 d4 37.ed4 cd4 38.Rgc1 Rc2 39.Rc2 Rd7 40.Rc6 Kf7 41.a4 d3 42.a5 Ke7?? 43.Kg2?? Kf7?? 44.a6?? Kg7 45.Kg1 Bb2 46.Kg2 Ba3 47.Kg1 h5 48.h4 Bb4?? 49.Bb4+– d2 50.Bd2 Rd2 51.Rc7 Kh6 52.Ra7 Ra2 53.Kg2 Ra3 54.Rf7?? Ra2?? 55.a7+– Ra3 56.Kg1 Ra1 57.Kg2?? Ra2?? 58.Kg1?? Ra1 59.Kg2?? Ra2= ½–½. M8IN3 – 1815, Live Game Caissa's Web, 2005.

6.Nbd2 e6 7.a3 Bd6 8.c4 Ne4 9.c5 Bc7 10.Ne4 Be4 11.Bd3 Nf6 12.Qc2 Bd3 13.Qd3 Ne4 14.Nd2 Nd2 15.Qd2 0–0 16.f4 f5 17.Qf2 Rf6 18.Kd2 (18.0–0 Rh6=) 18...a6 19.Rag1 Qe8 20.g4 Bd8 21.g5 Rf7 (21...Rf8 22.Bc3+=) 22.h4 (22.g6 hg6 23.Rg6=) 22...g6 (better is 22...Re7!?=) 23.h5+/– Qd7 24.hg6 hg6 25.Rh6 1–0. Fournier,Frederic – Duregne,Olivier, Match Active, 1999.

6.Bd3 Bg6 7.Bg6 hg6 8.h3 e6 9.a3 Bd6 10.Nbd2 Qc7 (10...a5 11.Bc3+=) 11.Rc1 (11.c4 a5=) 11...Ke7 (11...a5!?+=) 12.c4= dc4 (12...Ke8 13.cd5 ed5 14.b5=) 13.Nc4+= Nb6 14.Nb6 (14.Nce5 Rad8+=) 14...Qb6= 15.Ne5 Rad8 16.Nc4 Qc7 17.Qc2 Nd5 (17...Ke8 18.e4 Be7 19.Nd2=) 18.Nd6 (18.e4!? Bf4 19.ed5 Bc1 20.d6 Rd6 21.Qc1+/–) 18...Qd6+= 19.Qc5 Qc5 20.dc5 Nf6 21.Bf6 gf6 22.Ke2 Rd5 23.Rcd1 Rhd8 24.Rd5 ed5 25.Rd1 Ke6 26.e4 d4 27.f4 g5 28.fg5 fg5 29.g4 (29.Kd3!?+=) 29...Ke5+= 30.Kf3 (better is 30.Rf1!? Rh8 31.Rf7 Rh3 32.Re7 Kf4 33.a4+=) 30...Rh8 31.Rh1 a6 32.Rh2 f6 (32...Rh6!?–+) 33.a4–/+ Rh7 34.a5 Rh8 35.Rh1 Rh7 36.Rh2 Rd7 37.Rd2 (better is 37.Rf2–/+) 37...Rh7?? (37...d3!? 38.Ke3–+) 38.Rh2–/+ Rd7 39.Rd2 Rh7?? (better is 39...d3 40.Ke3 Rd4 41.Rd3 Re4 42.Kf2 Rf4 43.Kg3 Rb4 44.Re3 Kd4–+) 40.Rh2= ½–½. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 c6 4.e3 Bf5 5.d4 Nbd7)

6.Nh4 Be4 =+.

5.d4 e6

6.a3 b5 7.Bd3 Nbd7 8.Ne5 Qc7 9.Qe2 Bd6 10.f4 0–0 11.h3 a5 12.ba5 Qa5 13.c3 Bd3 14.Qd3 Be5 15.fe5 Ne4 16.0–0 Qa4 17.Nd2 Nd2 18.Qd2 f5 19.g4 fg4 20.hg4 Rf1 21.Rf1 Rf8 22.Rf8 Nf8 23.Kg2 h6 24.Kf3 Nh7 25.Kg2 Ng5 26.Qc1 Ne4 27.Kg1 Qb3 28.Kg2 Kh7 29.Kg1 Kg6 30.Kg2 Kg5 31.Kf3 g6 32.a4 b4 33.cb4–/+ Qa4 34.Ba3 Qa7 35.Kg2 Qf7 36.Qe1 Kg4 37.Qe2 Kh4 38.Qe1 Kg5 39.b5 cb5 40.Be7 Qe7 41.Kh3 Kf5 42.Qf1 Nf2! 43.Qf2 Ke4 44.Qc2 Ke3 45.Qg6 Kd4 46.Qh6 Ke5 47.Qe3 Kf6 48.Qh6 Kf5 49.Qe3 Qh7 50.Kg2 Qg7 51.Kf2 Qb2 52.Kf1 Qb1 53.Kf2 Qc2 54.Kg1 Qe4 55.Qf2 Kg4 56.Qb2 b4 57.Qg7 Kf3 58.Qg2 Kf4 59.Qf2 Kg4 60.Qb2 e5 61.Qc1 Qd4 62.Kh1 b3 63.Qc8 Kf4 64.Qf8 Ke3 65.Qh6 Kd3 66.Qa6 Qc4 67.Qa1 Qh4 68.Kg2 Kc2 69.Qa6 Qc4 70.Qb6 b2 71.Qf2 Kd1 72.Qg1 Kd2 73.Qb6 Qe4 (73...Qe4 74.Kh3 Qe3 75.Qe3 Ke3–+) 0–1. Lumsdon,Andrew – Donev,Ivo Hristov (2415), Bad Ragaz op, 1992. (=1.d4 d5 2.Nf3 Bf5 3.e3 e6 4.a3 Nf6 5.b4 c6 6.Bb2)

6.a3 Bd6 7.c4 0–0 8.c5 Bc7 9.Nc3 Re8 10.Bd3 Bg6 (10...Bd3 11.Qd3 Nbd7 12.0–0=) 11.0–0 Nbd7 12.Bg6 hg6 13.b5 e5 14.a4 e4 15.Ne1 Kh7 16.g3 Rh8 17.Ng2 Kg8 18.f4 Qe7 19.Qe2 Qe6 20.Nd1 Qh3 21.Nh4 Nf8 (21...Ng4 22.Qg2 Qg2 23.Kg2 Nh2 24.Kh2+=) 22.Qg2 Qg2 23.Ng2 Ng4 The backward pawn on h2 becomes a target 24.h4 Rb8 25.Nf2 Nf2 (25...Nf6 26.Bc3+=) 26.Rf2 f5 27.Bc3 Ne6 28.Rb2 Kf7 29.Rab1 Ke7 30.Ne1 Kf7 31.Nc2 Ke7 32.bc6 bc6 33.Nb4 Kd7 34.Na6 Rb2 35.Rb2 Rc8? (better is 35...Ra8+=) 36.Rb7+– Ra8 37.Nc7 Nc7 38.Ba5 Rc8 39.Ra7 (39.Ra7 Kd8 40.Bb6+–) 1–0. UncleBulgaria – nimzo1, ChessWorld.net, 2016.

6.a3 Nbd7 7.Be2 Bd6 8.Nbd2 Qe7 9.c4 dc4 10.Nc4 Bc7 11.0–0 Ne4 12.Rc1 Rd8 13.Qb3 Bb8 14.Rfd1 f6 15.Ncd2 0–0 16.Ne4 Be4 17.Nd2 Bd5 18.Bc4 Qd6 19.g3 f5 20.Bd5 ed5 21.b5 Nf6 22.bc6 bc6 ½–½. Scripcaru,George_Daniel (1795) – Radulescu,G (1930), ch–ROU Men Sarata Monteoru ROU, 2011.

6.a3 Be7 7.c4 0–0 8.c5 Nbd7 (8...b6 9.Bd3=) 9.Nc3 (9.Bd3 Bd3 10.Qd3 b6=) 9...b6 10.Be2 (10.Ba6 Rb8 11.Qe2 Bg4=) 10...Qb8 11.cb6 (11.Qd2 Ne4 12.Qc1 a5=) 11...Qb6 (11...ab6 12.Nh4=) 12.0–0 (12.Nh4 Be4 13.0–0 h6=) 12...a5 13.b5 (13.Na4 Qc7=) 13...cb5+= 14.Nb5 Rfc8 15.Rc1 Ne4 16.a4 Qb7 17.Qb3 Bg4 18.Rc8 (18.Bc3 Ra6+=) 18...Rc8 19.Rc1 Rc1 20.Bc1 Qc6 21.Bb2 Bh4 22.Nh4 Be2 23.Nc3 Bc4 24.Qd1 (24.Qa3 Nd6+=) 24...Nb6 (24...Ba6 25.Ne4 de4 26.d5 Qd5 27.Qd5 ed5 28.Nf5–/+) 25.Nf3 f6 26.Nd2 (26.Qc2 Ba6 27.Qb3 Qc4 28.Qc4 Nc4–/+ (28...dc4? 29.Ne4 Na4 30.Ba1+–; 28...Bc4?! 29.Ba1+=)) 26...Nd2–/+ 27.Qd2 Bb3 28.Qd3 (28.Qc1 Nc4+=) 28...Ba4 (worse is 28...Na4 29.Na4 Qa4 30.Qa6+=) 29.Ba3 Nc4 (29...Bb3 30.f3–/+) 30.Bc5 Qd7 31.e4 Bc6 32.ed5 (32.Qe2 a4–/+) 32...ed5 (32...Bd5 33.Qd1–/+) 33.Ne2 (33.Qb1 Qe8–/+) 33...a4 34.h3 Qe8 (34...Qe6 35.Qd1–/+) 35.Qd1 h6 36.Nc3 Na5 37.Kf1 (37.Bb4 Nb3–/+) 37...Nb3–+ 38.Bb4 (38.Qd3–+) 38...Qb8 39.Ba3 Qh2 40.f3 (40.Qg4 f5! 41.Qh4 f4 42.Qd8 Kh7–+) 40...Qh1 41.Kf2 Qd1 42.Nd1 Nd4 43.Ne3 Kf7 44.Bb2 Ne6 (44...Nb5 45.Nc2–+) 45.Nf5 Nf4 46.Ba3 Bd7 47.Nd4 h5 48.h4 (48.Ne2 Nd3 49.Ke3 Ne1–+) 48...g5 (48...Ng6 49.Kg3–+) 49.hg5 fg5 50.Bd6 (50.Ne2 Ke6–+) 50...h4 51.g3 (51.Ne2 Nd3 52.Ke3 Ne1–+) 51...Nd3 52.Kg2 h3 53.Kh2 g4 54.fg4 Bg4 55.Nc2 (55.Nb5 Ne1 56.Nd4 Kf6–+) 55...Ke6 56.Bf8 (56.Ba3 Ke5–+) 56...Ke5 57.Ne3 Bd7 0–1. soltpl (2040) – orlink (2240), gameknot.com, 2016.

6.a3 Bg4 7.h3 Bf3 8.Qf3 Bd6 9.Bd3 Nbd7 10.Nd2 0–0 11.0–0 Re8 12.Rfe1 e5 13.de5 Ne5 14.Qe2 Nd3 15.cd3 Be5 16.Nf3 Bb2 17.Qb2 Qd6 18.Rac1 Rac8 19.Rc2 a6 20.Rec1 Rcd8 21.Rd2 Nd7 22.Re2 Qf6 23.Qf6 Nf6 24.Rce1 Re7 25.Nd2 Rde8 26.Kf1 Kf8 27.Nb3 Nd7 28.Nc5 Nc5 29.bc5 f5 30.d4 g5 31.Rb2 Rd8 32.Reb1 Rdd7 33.a4 h6 34.g3 Kf7 35.a5 Ke8 36.Rb6 Kd8 37.R1b2 Kc8 38.R2b3 Rc7 39.Rb2 Re4 Black plans f4 40.Kg2 f4 41.gf4 gf4 42.ef4 (42.R6b3 Rg7 43.Kf3 Rf7=) 42...Rf4 (42...Rd4!? 43.R2b4 Rg7 44.Kh2 Rd2–/+) 43.R6b4= Rg7 44.Kh2 Rgf7 45.Kg2 Rg7 46.Kh2 h5 47.Ra4 h4 48.Rab4 Rgf7 49.Kg2 Rg7 50.Kh2 Rf3 51.R4b3 Rf4 52.Rb4 ½–½. Fournier,Frederic – Guest1136552, Partie amicale, 0m + 4s, 2008.

5.Be2 Nbd7

6.0–0 e5 =.

6.0–0 e6 7.a3 Bd6 8.d3 Qb8 9.Nbd2 0–0 10.h3 e5 11.c4 Rd8 12.Qb3 b5 13.cd5 cd5 14.g4 Be6 15.Ng5 Nf8 16.Ne6 Ne6 17.Bf3 Bc7 Black prepares the advance d4 18.Bg2 Qb6 Black plans d4 19.Rac1 Rac8 20.Nf3 d4 21.Rfe1 de3 22.fe3 Nf4 23.Bf1 N4d5 24.Rc7?? Rc7–/+ 25.Be5 Rc1! 26.d4 Rc3–+ 27.Qb1 Ne3 28.Bd3 Ned5 29.Be4? Ne4 30.Qe4 f6 31.Bh2 Rc4 32.g5 fg5 33.Be5 Nf4! 34.Ng5 Ng6 35.h4 Qc6 36.Qf5? Qd7 37.Qd7–/+ Rd7 38.h5 Ne5 39.Re5 Rd8 40.Rb5 Rcd4–+ 41.Ne6 Rg4 42.Kf2 Re8 43.Nc5 Rg5 44.Rb7 a5 45.Rc7 ab4 46.ab4 Rh5 47.b5 Rb8 48.Ne6 g6 49.Nd4 Rd5 50.Nc6? Rf5 51.Kg3 Rfb5 52.Nb8 Rb8 0–1. Stefanova,M (1990) – Sirkova,D (2080), ch–BUL U20 Girls, Sofia BUL, 2010.

6.0–0 e6 7.a3 Bd6 8.d3 Qc7 9.h3 Ne5 10.Nbd2 h5 (10...Nf3!? 11.Nf3 0–0–0=) 11.Ne5 Be5 12.Be5 Qe5 13.Nf3 (13.d4 Qd6+=) 13...Qc7 14.c4 Bg4 15.Nh2 (15.Rc1 Bf3 16.Bf3 g5 17.cd5 ed5+=) 15...Be2= 16.Qe2 Ng4? (better is 16...dc4!? 17.dc4 0–0–0=) 17.Ng4 (better is 17.hg4!? hg4 18.g3 (18.Ng4?! f5+/–) 18...dc4 19.dc4+– (worse is 19.Ng4 cd3 20.Qd3 f5+–)) 17...hg4+/– 18.Qg4 Qe5 19.d4 Qf6 20.cd5 cd5 (20...ed5 21.Rac1+/–) 21.Rac1 Kd7 22.Rc5 Kd6? (better is 22...Ke8+–) 23.Qg3 e5 (23...Ke7 24.Qc7 Ke8 25.Qb7+–) 24.Rd1 Rh5 (24...Ke7 25.de5 (25.Qe5?! Qe5 26.de5 Rad8+–) 25...Qe6 26.Rcd5+–) 25.Rd5!! Kc7 26.de5 Qg6 27.Rc1 Kb6 28.Rd6 Qd6 29.ed6 g6 30.Qf4 f5 31.Qd4 Kb5 32.a4! Ka6 33.Qc4 b5 34.Qb5 1–0. Fournier,Frederic (1875) – Lamarre Bruno, FRA Cup (Team) 2T BelloySurSomme–Senlis, 2003.

6.0–0 e6 7.d3 Be7 (7...Bb4!? 8.Nh4 Bg6–/+) 8.a3 (8.Bc3 Bg4=) 8...0–0 (8...a5 9.ba5 Qa5 10.Nbd2=) 9.Nbd2 (9.Nh4 a5=) 9...h6 (9...a5 10.ba5 Qa5 11.Nh4=) 10.c4 (10.Nb3 Bd6=) 10...Nb6 (10...a5 11.Qb3=) 11.Qb3 d4? 12.Nd4+/– Bg6 13.N4f3 c5 14.b5 Bd6 15.a4 Nbd7 16.a5 b6 17.Rfd1 Ng4 18.h3 Nge5 19.Ne4 (White gets in control) 19...Be4 20.de4 Qe7 21.Ne5 Ne5 22.f4 Ng6 23.e5 Bc7 24.Bf3 Rad8 25.ab6 Bb6 26.Rd8 Rd8 27.Rd1 Rd1 28.Qd1 Nh4 29.Kf2 Nf5 30.e4 Qh4+/– 31.Kg1 Ng3 32.Qe1 Qf4+= 33.Qf2 Ne4–+ 34.Be4 Qe4 (35.Qf1 Bc7–+) 0–1. uno (1800) – guest400, ICC, 2003.

6.a3 Qc7 =.

6.a3 e6 =.

6.Nh4 Bg6 7.a3 e6 (7...e5 8.0–0=) 8.Ng6 (8.0–0 Qb6=) 8...hg6 9.c4 (9.Nc3 Bd6=) 9...Bd6 (9...dc4 10.Bc4 Bd6 11.h3=) 10.cd5 ed5 (10...cd5 11.h3=) 11.f4 (11.h3 Qe7=) 11...Qe7 (11...g5 12.0–0=+) 12.0–0= 0–0 (12...g5 13.Rf3=) 13.Nc3 (13.b5 Rfe8+=) 13...Ne4 14.Ne4+= (White gets the initiative) 14...de4 15.d3 ed3 16.Qd3 Nf6 17.Rad1 Nd5 18.Bf3+/– Qe3 19.Qe3+– Ne3 20.Rd6 Nf1 21.Kf1 Rad8 22.Rd8 Rd8 23.Ke2 f5 24.g3 a6 25.Ke3 Kf7 26.Be2 Re8 27.Kf3 Rd8 28.Bc4 Kf8 29.Ke3 Rd1 30.Be5 Rc1 31.Bb3 Re1 32.Kf3 Rb1 33.Bc4 Rc1 34.Bb3?? Rb1 35.Bc4 Rc1 36.Bb3?? Rb1= 37.Bc4?? (better is 37.Be6+–) ½–½. Caissa – SemiAwesome, Live Game Caissa's Web, 2005.

6.0–0 Qc7

7.c4 h6 8.Nc3 e5 9.b5 Be7 10.bc6 bc6 (worse is 10...Qc6 11.cd5 Qd6 12.d3+/–) 11.cd5 cd5 12.Nb5 Qb8 13.Rb1?? (better is 13.d4 e4 14.Ne5+=) 13...Bb1–+ 14.Qb1 a6 15.Nc3 0–0 16.a4 Bd6 17.h3 Re8 18.Qa2 Qb7 19.Rb1 Qc6 20.Rc1 Qb7 21.Rb1 Qc6 22.Rc1 Qb7?? (better is 22...Rac8–+) 23.Rb1= Qc6 ½–½. mr5reasons1 (1655) – dennis84 (1715), gameknot.com, 2012.

7.d4 e6 8.a3 a5 9.ba5 Bd6 10.c4 =.

7.d4 e6 8.a3 Bd6 9.Nbd2 (9.c4 dc4 10.Bc4 0–0=) 9...b5+= 10.a4 Rb8 (10...Bb4 11.c3 Be7 12.ab5 cb5 13.Bb5=) 11.ab5 (11.c3 Ne4=) 11...cb5 12.Ra5 (12.c3!?=) 12...Bb4–/+ (worse is 12...Qc2 13.Qc2 Bc2 14.Ba3=) 13.Rb5 Rb5 (13...Qc2? 14.Qc2 Bc2 15.Rb8 Nb8 16.Rc1+–) 14.Bb5 Bc2 (14...Qc2? 15.Qc2 Bc2 16.Rc1+–) 15.Qa1 (15.Qe2 0–0 16.Rc1 Rc8+–) 15...Qb8 (15...Ng4 16.h3 Nh6 17.Rc1+–) 16.Rc1+= Qb5 17.Rc2 0–0 18.Qa7 Qe2 (18...Qd3 19.Ne1 Qg6 20.Ndf3=) 19.Qa1 Qd3 20.Qc1 h6 (20...Rd8 21.Bc3 Be7 22.Ba5=) 21.Bc3 Bd6 22.Ba5 Ra8 23.Ne1 (23.Bc7 Ba3 24.Qb1 Bb4=) 23...Qf5 (23...Qg6 24.Rc8 Rc8 25.Qc8 Kh7 26.Qc6=) 24.Bc7 (24.Rc8 Rc8 25.Qc8 Kh7+=) 24...Ba3 25.Qb1 Ne4 (25...Be7 26.Bf4+=) 26.Ne4= Qe4? (better is 26...de4 27.Ra2 Qd5=) 27.Qb7+/– Rf8 (better is 27...Ra4 28.Ra2 Qg4+–) 28.Qb3?? (better is 28.Ra2 Bc1 29.Bd6 Be3 30.Bf8 Bf2 31.Kf2 (31.Rf2?! Qe1 32.Rf1 Qe3 33.Kh1 Qd3=) 31...Qd4 32.Kf1 Qc4 33.Re2 Nf8 34.Nf3+–) 28...Be7= 29.f3 Qg6 30.Bg3 Nf6 31.Nd3 Ra8 32.Ne5 Qf5 33.Qd3 Qd3 34.Nd3= Ra3 35.Rd2 Bd8 36.Rd1 Nd7 37.Bf2 Nb6 38.e4 Nc4 39.ed5= ed5 40.Nf4 Bb6?? 41.Nd5+/– Ba7 42.Ne7 Kf8 43.Nc6 Ke8 44.Na7 Ra7 45.g3 Ra2+= 46.Rc1 Nd2 47.Kg2+/– Ra3 48.Re1 Kd7 49.Re3 Re3 50.Be3 Nb3 51.Kf2 Kd6 52.Ke2 Kd5 53.Kd3 Na5 54.g4 Nc6 55.h4 Ne7 56.Bd2 Nc6 57.Be3 Ne7 58.h5 f5 59.Bc1 fg4 60.fg4 Ng8 61.Ke3 (61.Ke3 Nf6 62.Kf4+/–; 61.g5!? Ke6 62.Ke4 hg5 63.Bg5 Kf7+–) 1–0. Raheb,David (2140) – Tessier Desrosiers,Olivier, CAN–ch U18 Montreal, 2001.

7.d4 e6 8.a3 Bd6 9.h3 0–0 10.Nbd2 b5 11.Bd3 Bg6 12.Re1 Nb6 13.e4 (13.Bg6 hg6 14.e4 de4 15.Ne4 Ne4 16.Re4 a5=) 13...de4+= 14.Ne4 Ne4 15.Be4 Be4 16.Re4 Na4 17.Rb1 Rad8 (17...Nb2 18.Rb2 a5 19.Qe1+=) 18.Ba1 a6 19.Qe1 Rd7 20.Rb3 Nb6 21.g3 Nc4 22.Kg2 Re8 23.Rd3 Rde7 24.Ne5 Be5 25.de5 Rd7 26.Rd7 Qd7 27.Rd4 Qc7 28.Rd3 Rd8 29.Qe4 Rd5 Pawn e5, live or die! 30.a4 Qd7 31.a5 Qe7 32.Bc3 Na3 (32...h6 33.Qf3+=) 33.h4 (33.Bd2 Nc4 34.Bc3 h6+=) 33...Qd7 34.Kh2 g6 35.Rf3 Nb1 36.Be1 Rd4 37.Qe2 Nd2 38.Rd3 Nc4 39.Bc3 Rd5 40.Rf3 (40.Qf3 Qe7=) 40...Qc7 (40...c5 41.bc5 Qc7 42.Rd3 Rc5 43.Qd1+=) 41.Rd3= Kf8 42.f4 Qa7 43.Be1 Rd3 44.cd3+= Ne3 45.Bf2 Ng4 46.Kg2 Qf2 47.Qf2 Nf2 48.Kf2 Ke7 49.Ke3 Kd7 50.Kd4 Kd8 51.Kc5 Kc7 52.g4 h6 53.h5 Kb7 54.Kd6 gh5 55.gh5 c5 56.Kc5 Kc7 57.d4 Kd7 58.Kb6 Kc8 59.Ka6 Kc7 60.Kb5 Kb7 61.Kc5 Kc7 62.d5 Kd7 63.d6 f6 64.a6 Kc8 65.Kc6 Kd8 66.a7 Ke8 67.a8Q Kf7 68.Kd7 Kg7 69.Qg2 Kf8 70.Ke6 Ke8 71.Qg8 1–0. Mallmann,Bernd (1970) – Goedde,Patrick, Rheinland–ch, 2005.

7.Nh4 Bg6 8.f4 e6 9.a3 Be7 10.c4 0–0 (10...dc4 11.Bc4 Bh5 12.Nf3=) 11.Nc3 h6 (11...a5!? 12.b5 Rad8+=) 12.Ng6+/– fg6 13.Qc2 Rf7 (13...a5 14.b5+/–) 14.Qg6 Nf8 15.Qc2 g6 16.Rac1 Qd7 17.Bd3 Rd8 (better is 17...dc4!? 18.Bc4 b5+/–) 18.cd5+– ed5 19.Bg6 Ng6 20.Qg6 Rg7 21.Qd3 Qg4 22.Rf2 h5 23.Qe2 Qg6 24.f5 Qg5 25.Na4 Kh7 (25...Rf7 26.Rff1+–) 26.Bf6 Bf6 (26...Qf6 27.Qh5 Kg8 28.Nc5 Bc5 29.bc5+–) 27.Nc5 Re7 (27...Qh4 28.Rf4 Rg4 29.Rg4 hg4 30.Nb7+–) 28.Ne6 (28.Ne6 Re6 29.fe6+–) 1–0. Lehmann,Lothar (1975) – Ptitsyn,Vadim, Leipzig VfB op, 2008.

7.Nh4 Bg6 8.f4 e6 9.a3 Be7 10.d3 Qb6 11.Qd2 c5 12.b5 (12.Ng6 hg6 13.c3 Rd8=) 12...Qb5+= 13.c4 dc4 14.dc4 Qb6 15.Ng6 hg6 16.Bf3 Rd8 17.Qc2 Qc7 18.Nd2 a6 19.a4 0–0 (19...g5!? 20.g3 g4+=) 20.a5 Nb8 0–1 (?). Sinclair,Colin – Burke,Mitchell R, GBR–ch Major op, 2008.

5.Be2 e6

6.0–0 Bb4+= 7.a3 Bc5 (7...Bd6 8.Nh4–/+ (8.Nd4 0–0 9.Nc3 Nbd7 10.f4 Nc5 11.Rf3 Bg6 12.Rf1) 8...0–0 9.Nf5 ef5 10.Nc3 Nbd7 11.f4 Nc5 12.Qe1) 8.c4 (8.d3 Bg4–/+ (8...Nbd7 9.Nc3 0–0 10.Nd4 Bg6 11.Qd2 e5 12.Nf3) 9.h3 Bf3 10.Bf3 Nbd7 11.Nd2 0–0 12.c4; 8.Nh4 0–0 9.Nc3 Nbd7 10.h3 Qc7 11.Nf5 ef5 12.d4; 8.Nc3 Nbd7 9.Nd4 0–0 10.f4 Bd4 11.ed4 Qb6 12.Na4; 8.Nd4 0–0 9.Nc3 Nbd7 10.Rb1 Qa5 11.f4 h6 12.Kh1; 8.g3 Nbd7 9.Nc3 0–0 10.Nd4 Bh3 11.Re1 Bd6 12.a4) 8...dc4 (8...Nbd7 9.cd5 ed5 10.Nh4 Be6 11.Nc3 0–0 12.Nf3) 9.Bc4 Nbd7 10.Nc3 (10.Qb3 Nb6–/+ (10...Qb6 11.Qa2 0–0 12.Nc3) 11.Nc3 0–0 12.Be2) 10...0–0 (10...Bd6 11.d4–/+ (11.Nd4 Qa5 12.Qb3) 11...0–0 12.Bd3) 11.d4 Bd6 12.Re1 (12.Bd3 Bd3 13.Qd3 Nd5–/+) 12...Nb6 (12...Bg4 13.h3 Bh5 14.Be2–/+) 13.Ba2 (13.Bd3 Bd3 14.Qd3 Rc8–/+) 13...Nbd5 (13...Nfd5 14.e4 Nc3 15.Bc3–/+) 14.Nd5 (14.Qb3 Qd7–/+) 14...cd5 (worse is 14...Nd5 15.e4 Qb6 16.Bb3+/–) 15.Nh4 (15.Bb1 Be4–/+) 15...Bg4–+ 16.Qb3 (better is 16.f3 Bh5 17.Qe2–+) 16...Ne4 17.f3 (17.g3 Qf6 18.f3 Bf3 19.Nf3 Qf3 20.Rf1–+) 17...Qh4 18.f4 (18.Qc2 Qh2 19.Kf1 Bf3 20.Qf2 Nd2 21.Qd2 Qh1 22.Kf2 Qg2) 18...Qf2 19.Kh1 Bh3! 20.Rg1 (20.gh3 Qf3 Mate attack) 20...Qf4! 21.g3 (21.ef4 Nf2 Mate attack) 21…Nf2# 0–1. Neumann,Frank (1635) – Trokenheim,Marek (2175), RSX5D – A00 – Sokolsky–1, 2010.

6.0–0 Bb4+= 7.Nc3 Nbd7 (7...0–0 8.Nd4 Nbd7 9.f4 Nc5 10.a3 Ba5 11.Qe1 Qd6 12.Rb1) 8.Nd4 (8.h3 0–0 9.Nd4 Bg6 10.f4 h6 11.a3 Bd6 12.Qe1; 8.Nh4 0–0 9.Nf5 ef5 10.a3 Bd6 11.f4 Nc5 12.Qe1; 8.a3 Bd6 9.Nd4 0–0 10.Qe1 Nc5 11.f4 Bg4 12.Bg4) 8...0–0 9.f3 Bg6 10.f4 h6 11.f5 ef5 12.Nf5.

6.0–0 Bb4+= 7.Nd4 A) 7...Nbd7 8.c4 (8.Nf5 ef5 9.c4 0–0 10.cd5 cd5 11.Nc3 Nc5 12.Rc1) 8...0–0 9.cd5 Nd5 10.Nf5 ef5 11.Qc2 g6 12.Nc3; B) 7...0–0 8.c4 (8.Nf5 ef5 9.c4 Nbd7 10.Qc2 dc4 11.Qc4 Qe7 12.Nc3) 8...Nbd7 9.cd5 Nd5 10.Nf5 ef5 11.Qc2 g6 12.Nc3.

6.0–0 Bb4+= 7.Nh4 A) 7...0–0 8.g4 Ne4 9.Nf5 ef5 10.f3 Nd6 11.Nc3 Nd7 12.Qe1; B) 7...Nbd7 8.Bd4 (8.Nc3 0–0 9.Nf5 ef5 10.d4 g6 11.h3 Bd6 12.Qd2; 8.a4 0–0 9.Nc3 Nc5 10.f3 Qc7 11.d4 Ncd7 12.g4; 8.Nf5 ef5 9.c4 0–0 10.cd5 Nd5 11.a3 Bd6 12.Nc3; 8.h3 0–0 9.Nc3 Nc5 10.d3 Qa5 11.Nf5 ef5 12.Nb1; 8.c4 0–0 9.Nf5 ef5 10.Qc2 g6 11.cd5 Nd5 12.Nc3) 8...Bc5 9.Nc3 0–0 10.Nf5 ef5 11.Bd3 g6 12.Re1; C) 7...Be4–/+ 8.f3 Bg6 9.Bd4 c5 10.Bb2 Nc6 11.Nc3 0–0 12.a3.

6.a3 c5 7.bc5 Bc5 8.Bd4 =.

6.a3 Ne4 7.0–0+= Nd7 8.d3 Ng5 (8...Nef6 9.c4+=) 9.Re1 (9.Nd4 h5+/–) 9...Bg4 (9...Nf3 10.Bf3 Qc7 11.e4 de4 12.de4=) 10.Ng5 Be2 11.Ne6 (11.Nf7!? Bd1 12.Nd8 Bc2 13.Ne6+/–) 11...Bd1= 12.Nd8 Bh5?? (better is 12...Bc2 13.Nb7 Bd3+=) 13.Nb7+– Rb8 14.Nc5?? (better is 14.Na5 c5 15.Nc6+–) 14...Nc5 (better is 14...Bc5 15.Bg7 Rg8=) 15.bc5?? (better is 15.Be5 Nd7 16.Bb8 Nb8 17.e4 de4 18.Re4 Kd8 19.Nd2+/–) 15...Rb2–+ 16.Rc1 (16.d4 Rc2 17.a4 Bg6–+) 16...Bc5 17.c4 (17.Nc3 Bd6–+) 17...dc4 (better is 17...d4 18.ed4 Bd4–+) 18.Rc4 Bb6 (18...Bd6!? 19.Nc3 Kd7 20.Ne4–+) 19.Rc6 0–0 (better is 19...Kd7!? 20.Rc1 Bg6–+) 20.Nc3–/+ Rc2 21.Rc4 (21.Nd5 Rc6 22.Ne7 Kh8 23.Nc6 Rc8–/+) 21...f6 (21...Bg6 22.Nd5 Bd3 23.Rc2 Bc2 24.Rc1–+) 22.Ne4 (22.Nd5!? Rc4 23.dc4–/+) 22...Rc4–+ 23.dc4 f5 (23...Bg6 24.Nd2–+) 24.Ng3 Bf7 (24...Bg6 25.Rc1–+) 25.Rc1 (25.Nf5 Bc4 26.Ne7 Kf7–/+) 25...g6 26.c5 (26.e4 Bc5 27.a4 fe4 28.Ne4 Rc8–+) 26...Bc7 (26...Rc8!? 27.c6–+) 27.f4 (27.Ne2 Rb8–/+) 27...Ba5 (better is 27...Rc8 28.Ne2 Bd8–+) 28.c6? (better is 28.Kf2–/+) 28...Bd2–+ 29.Rc2 Be3 30.Kf1 Bf4 31.Kf2 (31.Ne2 Bd6–+) 31...Bg3 (better is 31...Rc8!? 32.Ne2 Bc7 33.Kf1–+) 32.Kg3 Rc8 33.c7 (33.Kf4 Bd5 34.c7 Kf7–+) 33...a5 (33...Kf8 34.Kf4–+) 34.h4 (34.Kf4 Kf8–+) 34...Bb3 (34...Kf8!? 35.a4–+) 35.Rc3 a4 36.Kf4 Kf7 37.Ke5 (37.Kg5 Bd5–+) 37...Ke7 38.g3 Kd7 39.Kf6 Rc7 40.Rd3 (40.Rc7 Kc7 41.h5 Bc2–+) 40...Kc8 41.h5 (41.Re3 Rc6 42.Kg7 h5–+) 41...gh5 42.Kf5 (42.Re3–+) 42...Bc2 0–1. overtoom – dgatenby, gameknot.com, 2013.

6.a3 Be7 7.d3 Nbd7 8.Nbd2 0–0 9.0–0 e5 10.c4 (10.Ne5 a5+=) 10...e4 11.de4 de4 12.Nd4 Bg6 13.f3 (13.c5!?+=) 13...c5= 14.bc5 ef3 15.N2f3 Bc5 16.Qd2 Ne4 17.Qc1 Ndf6 (17...Qe7 18.Bd3–/+) 18.Kh1 (18.Ne5 Qe7 19.Ng6 fg6=) 18...Qc7 19.Rd1? (19.Nh4 Bh5 20.Bh5 Nh5+=) 19...h6?? (better is 19...Nf2 20.Kg1 Nd1 21.Bd1 Qe7–+) 20.Bd3?? (better is 20.Kg1–/+) 20...Nf2–+ 21.Kg1 Nd1 (better is 21...Nd3 22.Qc2 Nb2 23.Qb2 Rae8–+) 22.Qd1 Bd4 (better is 22...Qe7!? 23.Qd2 Be4–+) 23.ed4–/+ Bd3 24.Qd3 Rad8 25.d5 b5! 26.cb5 Rd5–+ 27.Qf1 Ne4 28.Rc1? Qf4 29.Kh1? Nd2 30.Nd2 Qd2 31.Qe1?? Qe1 32.Re1 Rd2 (32...Rd2 33.Bc1 Ra2–+) 0–1. Fournier,Frederic (1810) – catupecu, Active, 2007.

6.a3 Be7 7.Nh4 Bg6 8.Ng6 hg6 9.0–0 Nbd7 10.d3 a5 11.c3 Qb6 12.Nd2 c5 13.Qa4 Qc7 14.h3 b5 15.Qb3 (15.Qb5!? ab4 16.cb4+=) 15...c4 16.Qc2 ab4 (16...g5!? 17.dc4 bc4+=) 17.ab4= 0–0 18.d4 Nb6 19.Bf3 e5 20.de5 Qe5 21.g3 Na4 22.Bg2 Ne4 Increases the pressure on c3 (22...Qf5 23.Qc1=) 23.Nf3+= Qb8 24.Nd4 Bf6 25.Ra2 Bd4 26.ed4 (worse is 26.Be4 Be3 27.Bg2 Bb6–/+) 26...Re8 27.Ra3 Ra6 28.Bc1 Rae6 29.Bf4 Qb7 30.Qc1 Qc6 31.h4 Nf6 32.Ra2 Nd7 33.Be3 Nf6 34.Bh3 R6e7 35.Bg5 Re4 36.Bg2 R4e6 37.Bf6 gf6 38.Rc2 Kg7 39.Bf3 R6e7 40.Qf4 Re1 41.Kg2 Rf1 42.Kf1 Qd7 43.Kg2 Qc6 44.Rc1 (44.Qd2 Qe6+=) 44...Qd7 (44...Nb2 45.Qd2 Nd3 46.Rh1=) 45.g4 Nb2 46.g5 f5 47.Ra1 Nd3 48.Qg3 Ne1 49.Kg1 Nf3 50.Qf3 Re4 51.h5 (51.Qh1 Qd6+=) 51...Qe7–/+ 52.hg6 Qg5 53.Kf1 Rg4 (53...fg6 54.Qh1 Qd2 55.Qf3–/+) 54.Qh1+= Kg6 (54...fg6 55.Ra7 Qe7 56.Re7 Kf8 57.Qh7 Rg1 58.Kg1 g5 59.Qf7; worse is 54...Qg6 55.Ra8 Qh7 56.Qh7 Kh7 57.Rd8+/–) 55.Qh2 (55.f3 Qf4 56.Ke2 Rh4 57.Qg2 Kf6–/+) 55...Qd2 56.Qh3 Qg5 57.Qh2 f6 58.f3 Rh4 59.Qg2 Rh8 60.Ra6 Re8 61.Qg5 Kg5 62.Kf2 f4 (better is 62...Kf4!? 63.Rf6 Ra8–/+) 63.Rd6= Re3 64.Rd5 Kg6 (64...Kh4 65.Rb5 Rc3+=) 65.Rb5+= Rc3 66.Rc5 Rc2 67.Ke1 f5 68.b5 Kh5 (better is 68...Kf6!?+=) 69.d5+– (69.d5 c3 70.d6+–) 1–0. Valenta,Vit (2195) – Krizek,Frantisek (2040), Stare Mesto op, 2009.

6.a3 g6 7.Nd4 g5 (better is 7...h5!?+=) 8.Nf5+/– ef5 9.c4 dc4 10.Bc4 Bg7 11.d4 0–0 12.0–0 Ne4 13.Nc3 Nc3 14.Bc3 Qd6 Black prepares the advance f4 15.Qf3 f4 16.Rad1 fe3? (better is 16...Nd7!? 17.Bb3 Rfe8+/–) 17.fe3+– Qe7 18.e4 Nd7 19.e5 b5? (better is 19...Nb6 20.Bd3 Qe6+–) 20.Bb3 Rac8 (20...Nb6 21.Qf5 (21.Qc6?! Rac8 22.Qf3 Nc4+–) 21...Rfc8 22.Bf7 Kh8 23.Rd3+–) 21.Qf5 Rcd8 (21...Rfd8+–) 22.Bc2 f6 (22...Rfe8 23.Qh7 Kf8+–) 23.Qh7 Kf7 24.Qh5 (24.Bg6 Ke6 25.d5 cd5 26.Qh3 f5 27.Bf5 Kf7 28.Qh5 Kg8 29.Qh7 Kf7 30.Bd7 Qf6 31.Rf6 Ke7 32.Qg7 Rf7 33.Rf7 mate) 24...Kg8+– 25.Bb3 (25.Bb3 Rf7 26.Rde1 Ne5 27.de5+–) 1–0. Djurisic,D (1960) – Dejanovic,Ivana, XXIII Belgrade Trophy, 2010.

6.a3 h6 7.0–0 Nbd7 (7...c5 8.bc5 Bc5 9.Bb5 Nbd7 10.Bd4=) 8.c4 (8.Nh4 Bh7=) 8...Bd6 (8...dc4 9.Bc4 Nb6 10.Be2=) 9.Qb3 (9.d3 e5=) 9...0–0 (9...dc4 10.Qc4 a5 11.Nc3=) 10.Nc3 (10.d3 e5=) 10...Re8 (10...dc4 11.Qc4 e5 12.d3=) 11.Rac1 (11.c5 Bc7=) 11...Bg4 (11...Ne5 12.Ne5 Be5 13.d4=) 12.cd5 (12.d4 dc4 13.Qc4 Nb6=) 12...ed5 13.h3 Bh5 14.b5 (14.Nd4 Be2 15.Nce2 c5 16.bc5 Nc5=) 14...Nc5 (14...Ne4 15.Rfd1=) 15.Qc2 Bg6 16.d3 Rc8 (16...Ne6 17.bc6 bc6 18.Rb1=) 17.bc6 Rc6 18.Qd1 (18.Nd4 Rc8=) 18...Rb6 (18...Qa5 19.Nb1=) 19.Ba1 (19.Rb1 Ne6=) 19...Nb3+= 20.Rb1 Na1 21.Rb6 Qb6 (worse is 21...ab6 22.Qa1 Qd7 23.Qb2+=) 22.Qa1 Qa5 (22...a6 23.Rb1 Qc7 24.a4+=) 23.Rb1= Rc8 (23...b6 24.Nb5 Bb8 25.Nbd4=) 24.Nb5 Bf8 (24...Bc5 25.Qe5=) 25.a4 (25.Ne5 a6 26.Nd4 b5 27.Ng6 fg6+=) 25...Nd7 26.Nh4 Bh7 27.Bg4 Rd8 28.Bf5 Nb6 The isolani on a4 becomes a target 29.Bh7 Kh7 30.Nd4 Rd7 31.Rb5 Qa4+= 32.Qa4 Na4–/+ 33.Ra5 Nc5 34.Ra7 Nd3 35.Ra8 Bc5 36.Nhf3 Rc7 37.Nb5 Rc6–/+ 38.Rb8? Rb6–+ 39.Nc3 Rb3 40.Nd5?? Rb1 41.Kh2 Bd6 (41...Bd6 42.g3 Bb8–+) 0–1. Wallhof,Dieter (1950) – Bachmann,Karlheinz (2210), 17sen.NRW–EM2006, 2006.

6.a3 h6 7.c4 dc4 8.Bc4 Be7 9.Qb3 0–0 10.0–0 a5 (10...b5 11.Be2=) 11.Nd4 (11.ba5 Nbd7=) 11...Bh7 (11...a4 12.Qd1 Bg6 13.f4=) 12.f4 (12.ba5 c5 13.Ne2= (worse is 13.Qb7 Be4 14.Ne6 Bb7 15.Nd8 Rd8–/+)) 12...b5 13.Be2 ab4 14.ab4 Ra1 15.Ba1 Qd5 16.Qb2 Qd6 17.Rc1 Attacking the backward pawn on c6 (17.Bf3 Bd3 18.Re1 Qb4 19.Qb4 Bb4 20.Bc6 Bb1 21.Rb1 Bd2–/+) 17...Rd8 (17...Qb4 18.Qb4 Bb4 19.d3–/+) 18.d3+= Bf8 19.Nd2 (19.Qd2 Nd5+=) 19...Nd5 20.Ne4 (20.Nc2 Nb4 21.Nb4 Qb4–/+) 20...Qb4 21.Qb4 Nb4 22.Kf2 Rd7 (22...Be4 23.de4 Be7 24.Kf3–/+) 23.Kf3 Ra7 24.Bc3 Nd5 25.Be1 Ra3 (25...Bg6 26.g4–/+ (26.Nc6? Rc7–+)) 26.Kf2 (26.Nc6!? Nc6 27.Rc6 Be4 28.Ke4+=) 26...Ra2–/+ 27.Kf3 Ba3 28.Rd1 Kf8 29.g4 (29.Rd2 Rd2 30.Nd2 Bd6–/+) 29...Ke7 (29...Bb2 30.Rd2–/+) 30.h4 (30.Nc3 Nc3 31.Bc3 g5–/+) 30...Kd7 (better is 30...Bb2–/+) 31.Bg3? (better is 31.Nc3 Nc3 32.Bc3–/+) 31...f5–+ 32.gf5 (32.Nf2 Nc3–+) 32...ef5 (32...Bf5?! 33.Nf5 ef5 34.Be1–/+) 33.Be1 fe4 34.de4 Nf6 35.Nb5 Ke8 36.Nc3 Rc2 37.Bd3 Rc1 38.Rc1 Bc1 39.Ne2 Bb2 40.Ng3 (40.Bc3 Bc3 41.Nc3 Nbd7–+) 40...Nbd7 41.Bc2 Bg6 (41...c5 42.Nf5 Bf5 43.ef5–+) 42.Nf5 Kf8 (42...Ng8 43.Nd6 Kf8 44.Bb3–+) 43.Bd2 (43.e5 Nd5–+) 43...c5 (43...Bh5 44.Kg2–+) 44.e5 Nd5 45.e4 Bf5 46.ef5 c4 47.Ke4 Bc3 (47...c3!? 48.Be3 Nb4–+) 48.Bc3–/+ Nc3 49.Kd4 Nb5 50.Kc4 Na3 51.Kc3 Nc2 52.Kc2 Nc5 53.Kc3 (better is 53.Kd2 Ne4 54.Ke3–+) 53...Ne4 54.Kd4 Ng3 55.f6 gf6 56.Ke3 (56.ef6 Nf5 57.Ke5 Nh4–+) 56...h5 57.Kf3 Nf5 58.Ke4 Nh4 59.ef6 Ke8 60.f7 (60.Ke5 Kf7 61.f5 Ng2–+) 60...Kf7 61.Ke5 Ke7 (61...Kg6 62.Ke4–+) 62.Kd5 (62.f5 Kf7 63.Ke4 Kf6–+) 62...Kf6 63.Ke4 Ke6 0–1. marekt (2185) – forsetinn (2435), gameknot.com, 2015.

6.a3 h6 7.c4 dc4+= 8.Bc4 Be7 (8...b5 9.Be2+=) 9.Qb3 (9.Nd4 Bg6=) 9...0–0 (9...b5 10.Be2=) 10.0–0 Nbd7 11.d4 Nb6 12.Be2 Nbd5 (12...Qd5 13.Nbd2=) 13.Nbd2 (13.Nc3 Qd6=) 13...Ne4 (13...a5 14.b5=) 14.Ne4 Be4 15.Nd2 Bh7 (15...Bf5 16.Rac1=) 16.Rac1 Bd6 (16...Qc7 17.b5=) 17.Nf3 (17.Nc4 Bc7=) 17...Rc8 (17...Be4 18.b5 cb5 19.Nd2= (19.Bb5?? Bf3 20.Rfe1 Qg5–+)) 18.Bd3 (18.Qa4 a6=) 18...Qe7 (18...Bd3 19.Qd3 a5 20.e4=) 19.Rc2 (19.Bh7 Kh7 20.e4 Nf4+=) 19...Qd8 (19...Bd3 20.Qd3 Qf6 21.Bc1=) 20.Bh7+= Kh7 21.Rfc1 (21.e4 Nf4+=) 21...Rb8 (21...Qd7 22.Qd3 Kg8 23.e4+=) 22.g3 (22.e4 Nb6+=) 22...Be7 (22...f5 23.h3=) 23.Ne5 Nf6 (23...Bd6 24.e4 Nc7 25.Qf3=) 24.b5 (24.Qa4 a6=) 24...cb5 25.Qb5 Bd6 26.a4 Kg8= 27.Qb3 a6 28.Nc4 Bc7 29.Ba3 Re8 30.a5 b5 31.ab6+= Bb6 32.Qa4 Qd5 33.Qa6 Bc7 34.Nd2 Ra8 35.Qd3 Ba5 36.Nc4 Ne4+= 37.f3 Ng5= 38.e4 Nh3?? 39.Kg2+– Qh5 40.f4 g5 41.Qe2 gf4?? 42.Qh5 (42.Qh5 fg3 43.Kh3+–) 1–0. Lipok,Erik – Knollmueller,Peter, Niederbayern–chA, 1997.

6.b5 cb5 7.Bb5 Nbd7 8.0–0 Be7 9.c4 (better is 9.Nh4!? Bg6 10.Ng6 hg6 11.f4=) 9...Bd3–/+ 10.Bd7 Nd7 (10...Kd7? 11.Ne5 Ke8 12.Qa4 Kf8 13.Nd3 dc4 14.Qc4+–; worse is 10...Qd7 11.Ne5 Qc7 12.Nd3 Qc4 13.Ne5+–) 11.cd5 Bf1 12.Qf1 Bf6 13.Bf6 Qf6 14.Nc3 0–0 15.Rb1 b6 16.Qb5 Ne5 17.Nd4 White gets in control 17...Ng6 18.de6 fe6 19.Ne4 Qe7 20.Qh5 Rfe8 21.f4 e5 (21...Rac8 22.Rf1+=) 22.Ng5= Nf8 (22...ed4? 23.Qh7 Kf8 24.Qg6+–) 23.Nc6 Qd7 24.Ne5 Qe7 25.Qf3 h6 (25...Qd6 26.d4+/–) 26.Qd5 Ne6 27.Ngf7 Qc5 28.Qb3 Qe7 29.f5 Nc5 30.Qd5 Kh7 31.d4 Nd7? (better is 31...Na6+–) 32.Qd7 (32.Qd7 Qd7 33.Nd7 Re3 34.f6+–; 32.Nd7?? Qe3 33.Kf1 Qd3 34.Kg1 Qb1 35.Kf2 Qe1 36.Kf3 Qe3 37.Kg4 Re4 38.Qe4 Qe4 39.Kg3 Qe3 40.Kg4 Qd4 41.Kg3 Qd7–+) 1–0. Schaefer,Dirk (2225) – Walter,Mario (2050), remoteschach.de, 2004.

6.b5 c5 7.c4 Nbd7 8.0–0 Bd6 9.d4 0–0 10.Nbd2 cd4 11.Nd4 Bg6 12.N4b3 Rc8 13.Rc1 Nc5 (13...Qe7 14.cd5 Rc1 15.Qc1 Nd5 16.Nc4=) 14.Nc5 Bc5 15.Qb3 dc4 16.Nc4 Qe7 17.Rfd1 Rfd8 18.a4 Nd5 19.Ne5 Bd6 (19...Be4!?=) 20.Ng6+/– hg6 21.g3 (21.Rc8 Rc8 22.Bf3 Nf6+/–) 21...Nf6 22.Bf3 Rc1 23.Rc1 b6 24.Rd1 ½–½. Schwichtenberg,Juergen (1915) – Niebling,Ferdinand (2220), Staufer Seniors op, 2008.

6.b5 Bd6 7.Nh4 =.

6.b5 Nbd7 7.0–0 (7.Nd4 Bd6+=) 7...Bd6 8.a4 c5 (8...Qc7 9.Nc3+=) 9.d3 (9.Nh4 Bg6=) 9...0–0 10.Nbd2 Qc7 11.h3 e5 12.c4 d4 13.e4 Be6 14.Ng5 Rfe8 15.Ndf3 Nf8 16.Ne6 Ne6 17.Bc1 Nd7 18.Nh4 (18.a5 a6 19.b6 Qd8=) 18...g6 (18...a6 19.Nf5=) 19.Bg4 Ndf8 (19...a6 20.Be6 Re6 21.Bd2=) 20.Be6 Ne6 21.Qg4 Kh8 22.Nf3 Qe7 23.Ng5 (23.a5 a6+=) 23...Ng5 (23...Nf4 24.Bf4 ef4 25.Qh4+=) 24.Bg5+= f6 25.Bd2 Qe6 26.Qe6 Re6 27.f4 (27.a5 a6+=) 27...ef4= 28.Bf4 Bf4 29.Rf4 Kg7 ½–½. Deppert,Sven – Theobald,Heiko, Deidesheim op5, 2000.

6.a3 Bd6

7.0–0 0–0 8.c4 (8.Nh4 Be4 9.d3 Nfd7=) 8...Nbd7 (8...dc4 9.Bc4 b5 10.Be2+=) 9.d4 (9.c5 Bc7=) 9...Ne4 (9...dc4 10.Bc4 a5 11.b5+=) 10.Nbd2= Rc8 (10...Qf6 11.Ne4 Be4 12.c5=) 11.c5 Bb8 12.Ne5 Be5 (12...Ne5 13.de5 Qh4 14.Ne4 Be4 15.f3=) 13.de5+= b6 14.f3 (better is 14.Ne4 Be4 15.f3=) 14...Ng5?? (better is 14...Nd2!? 15.Qd2 bc5+=) 15.Rc1 (15.h4 Nh3 16.gh3 Bh3 17.Rf2 Qh4 18.Rh2 Qg3 19.Kh1 bc5 20.Qa4 cb4 21.Rg1+– (worse is 21.ab4 Nb6 22.Qc2 Bf5+–)) 15...Qe7 (15...f6!?+=) 16.cb6 (16.h4 bc5 17.Ba6 Nh3 18.gh3 Rb8+=) ½–½. Lebel,Patrick (2165) – Fournier,Camille (2140), FRA–chT2, 2002.

7.0–0 Qc7 =.

7.0–0 Nbd7 8.Nc3 0–0 =.

7.0–0 Nbd7 8.d3 a5+= 9.ba5 (9.Nc3 0–0+=) 9...Ra5 (9...Qa5 10.Nbd2 Qc7 11.h3+=) 10.Nbd2+= Qc7 11.Nb3 Ra7 12.c4 (12.h3 h6+=) 12...dc4–/+ 13.dc4 0–0 14.Bd3 Bg4 15.h3 Bf3 16.Qf3 Rfa8 (16...Ne5 17.Qe2+=) 17.c5 Be5 18.Qe2 Bb2 19.Qb2 Qe5 Attacks the isolani on c5 20.Qc1 Ra4 21.Bc2 Qb8 (21...Nd5 22.Nd2 R4a7 23.Rd1–/+) 22.Nd4 R4a5 23.Nb3 R5a6 24.Bd3 Ra4 25.Rd1 Qa7 26.Qc2 h6 (worse is 26...Ra3 27.Ra3 Qa3 28.Ra1 Qa1 29.Na1 Ra1 30.Bf1+=) 27.Be2 Nd5 28.e4 N5f6 29.f3 b5 (worse is 29...Ra3 30.Ra3 Qa3 31.Ra1 Qa1 32.Na1 Ra1 33.Kf2+/–) 30.cb6 Qb6 31.Kh2 Ra3 32.Ra3 Ra3 33.Nd4 Exerts pressure on the isolated pawn 33...c5 34.Nb5 Qb8 35.g3 (35.Kg1 Ra6+=) 35...Re3–/+ 36.Nd6 Ne5 37.Kg2 (37.f4 Nc6 38.Bb5 Nd4 39.Qc5 Nb5 40.Qe3 Nd6 41.Rd6 Qd6–/+) 37...Qb4–+ 38.Qd2 Qa3 39.Rf1 Rb3 40.Rf2 Rb2 (40...Qb4 41.Qb4 cb4 42.Rf1–+) 41.Nb5 (41.Nc4 Nc4 (worse is 41...Rd2 42.Na3 Rd4 43.Bb5–/+) 42.Qd8 Kh7 43.Bc4 Rf2 44.Kf2 Qb2 45.Be2 c4–+) 41...Qa2 42.Qe3 c4 43.Nc3 Qa5 44.f4 Nc6 45.e5 (45.Bc4?? Rf2 46.Kf2 Qc3 47.Qc3 Ne4 48.Ke3 Nc3–+) 45...Nd5 (45...Rb3 46.ef6 Qc3 47.Qc3 Rc3 48.f5 ef5 49.Rf4–+) 46.Nd5 ed5 47.e6 Qb6 48.ef7 Kf7 49.Qa3 Rb4 50.Bf3 Qc5 51.f5 Ne5 52.Re2 Nf3 (better is 52...c3!? 53.Qa8 Rb2 (53...Nf3?? 54.Qe8 Kf6 55.Qg6) 54.Rb2 cb2 55.Qb7 Kf6 56.Qb2 Kf5 57.g4 Ke6–/+) 53.Qf3= Qc6 54.Qh5 Kf8 55.f6 Rb7 56.Qg6 d4 57.Kh2 gf6 58.Qh6 Rg7 59.Qh8 Kf7 60.Qh5 ½–½. Pommerel,Wim – Ganesan,Arasu, email 4AMM–F, 1998.

7.0–0 Nbd7 8.d4 Nb6 9.Nbd2 Na4 10.Ra2 Ne4 11.Ne4 Be4 12.Nd2 Bf5 13.c4 Nb2 14.Rb2 0–0 15.c5 Bc7 16.Nb3 e5 17.b5 Re8 18.bc6 bc6 19.de5 Be5 (worse is 19...Re5 20.Nd4 Bd7 21.Rb7+=) 20.Nd4 Bd7 21.Rb7 Bc8 22.Nc6 (better is 22.Rb3!? Qc7 23.Nf3=) 22...Bh2!–/+ 23.Kh2 Qh4 24.Kg1 Bb7 25.Na5 Bc8 26.Qd5 Be6 27.Qd4 Qg5 28.f4 Qg3 29.Nc6 Bg4 Attacking the backward pawn on e3 30.Bg4 Qg4 31.Ne5 Qe6 32.Qd6 (better is 32.Rd1!?+=) 32...f6–+ 33.Qe6 Re6 34.Nd7 Rc8 35.Kf2 Rc7 36.Rd1 Re7 37.Nb8 Rc5 38.Rd8 Kf7 39.Nd7? (better is 39.Rd3–+) 39...Rc2 40.Kf3 Rc3 41.Kf2 0–1. Kajtazi,Driton – Kapic,Ibrahim (2230), Velika Gorica op 4th, 2004. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 c6 4.e3 Bf5 5.Be2 e6 6.a3 Bd6)

7.c4 dc4 8.Bc4 b5 9.Be2 +=.

7.c4 h6 8.Nc3 0–0 9.d4 Nbd7 10.h3 Re8 11.0–0 Rc8 12.c5 Bc7 13.a4 e5 14.b5 e4 15.Nd2 Nh7 16.Re1 Qg5 17.Bg4 g6 18.f4 (better is 18.Bf5 Qf5 19.a5 cb5 20.Nb5=) 18...ef3!–/+ 19.Nf3 (19.Qf3 Bg4 Decoy; 19.Nf3 Re3 Discovered attack (19...Bg4 Decoy; 19...Bg4 Interception); 19.gf3 Bg4 Double attack (19...Re3 Discovered attack; 19...Bg4 Decoy); 19.Bf3 Re3 Discovered attack (19...Bh3 Pinning; 19...Bh3 Deflection)) 19...Bg4 20.Ng5 Bd1 21.Nh7 Bc2 (21...Kh7?! 22.Rad1 f5 23.Kf2+=) 22.Rac1 (better is 22.Rf1 f5 23.bc6 bc6 24.Nd5 cd5 25.Rfc1–+) 22...Be4 (22...Kh7?! 23.Rc2 f5 24.Kf2+=) 23.Rf1 Kh7?? (better is 23...f5–+) 24.Rf7–/+ Kg8 25.Rd7 Bf5 26.Rc7 Rc7 27.Kf2 Rf8 28.Ke2 Rcf7 29.Re1 Bd7 30.Kd3 Rf2 31.Re2 Re2 32.Ke2 a6 33.Ba3 ab5 34.ab5 Ra8 35.Bb4 Kf7 36.g4 h5 37.Kf3 hg4 38.hg4 Rh8 39.Kg3 g5 40.e4 de4 (better is 40...Rh4–+) 41.Ne4= Rh4?? Attacks the isolani on g4 (better is 41...Kg6 42.Bd2 Rh1+=) 42.Ng5+– Kg6 43.Kh4 1–0. combijack (1805) – pedroeleven (1690), gameknot.com, 2011.

7.d3 0–0 8.Nbd2 Nbd7 9.c4 Qc7 (9...c5 10.cd5 ed5 11.bc5 Nc5 12.Qb1=) 10.c5 (10.Nh4 Be5 11.d4 Bd6+=) 10...Be7= 11.0–0 b6 12.Re1 (better is 12.cb6!? ab6 13.Nh4=) 12...bc5–/+ 13.bc5 Bc5 14.Rc1 Bd3?? (better is 14...Bd6+=) 15.Bd3+– Bd6 (15...Qd6 16.Qa4+–) 16.e4 (16.Qc2 c5 17.e4 c4 18.Bc4 dc4+–) 16...Nc5 17.Nb3?? (better is 17.Qc2 Be7 18.Bf6 Nd3 19.Qd3 Bf6 20.Rc2+–) 17...Nd3= 18.Qd3 de4 19.Re4 Ne4 20.Qe4 Rac8 (20...Qb8 21.Qd4 f6 22.Qe3=) 21.Qg4 (21.Ng5!? g6 22.Qh4+/–) 21...e5= 22.Ng5 (22.Nc5!? Rfd8 23.Ne4+=) 22...h6+= 23.Ne4? (better is 23.Nf3+=) 23…f5–+ (23...f5 24.Qe2 fe4–+) 0–1. MTBrain – Wall,Bill, Microsoft Gaming Zone, 1998.

7.Nh4 0–0 8.0–0 Nbd7 9.f4 a5 10.Nf5 ef5 11.b5 Qe7 =.

7.Nh4 0–0 8.0–0 Nbd7 9.f4 a5 10.Nf5 ef5 11.Bd3 ab4 12.ab4 Ra1 13.Ba1 Bb4 14.Bf5 Qe7 15.Qf3 Ra8 16.Bd4 Bc5 17.Bc3 Ne4 18.Qh3 Nf8 19.Be5 f6 20.Bd4 Bd4 21.ed4 Nd6 22.Bd3 b5 23.c3 b4 24.cb4 Qb7 25.Na3 Qb4 26.Nc2 Qd2 27.Rf2 Qc1 28.Rf1 Qb2 29.Re1 f5! 30.Rd1 Ra4 31.Re1 g6 32.Qe3 Ne4 33.g4 Ne6 34.gf5 gf5 35.Qh3 Nd4 36.Be4 de4 37.Nd4 Qd4 (37...Qd4 38.Kh1 e3 39.Qf5 Qd5 (39...Qf4?? 40.Rg1 Qg4 41.Rg4 Rg4 42.Qg4 Kf8 43.Qe6+–) 40.Qd5 cd5 41.Re3 Rf4–/+; 37...Rd4?! 38.Qf5 Qb7 39.Kh1=) 0–1. Schulz,Hans_Juergen (2305) – Scholz,Sascha (2205), RS6D – A00 – Sokolsky Alt–1, 2004.

7.Nh4 0–0 8.0–0 Nbd7 9.f4 a5 10.Nf5 ef5 11.Bd3 g6 12.b5 Nb6 (12...Nc5 13.Be2=) 13.Nc3 (13.Ra2 Ne4+=) 13...c5 (13...Ne4 14.Be2=) 14.Qf3 (14.Qe1 c4 15.Be2 Bc5=) 14...Re8 (14...Ne4 15.Rfd1= (worse is 15.Ne4 fe4 16.Be4 de4 17.Qe4 Qd7–/+; 15.Be4?! fe4 16.Qe2 Re8=)) 15.Qg3 d4 16.ed4 cd4 17.Ne2 Ne4 (17...Bc5 18.Qf2=) 18.Be4 Re4 (18...fe4 19.Bd4 Rc8+=) 19.Qf2 (19.Qd3!?+=) 19...Nc4+= 20.Bd4 Na3 21.Ra2 (21.d3 Re6 22.Nc3 Bb4–/+) 21...Nb5 22.Be3 Bf8 23.Rfa1 a4 24.Ng3 Rc4 25.d3 Rb4 26.Bc5 Bg7 27.Kh1 Ba1 28.Bb4 Bg7 29.Qd2 Qb6–+ 30.Nf1 Nd4 31.c4 Re8 32.Ra4 Bf8 33.h3 Re2 34.Ra8 Rd2 35.Bf8 Ra2! 36.Bc5 Ra8 37.Bb6 Ne2 38.Kh2 Ra3 39.d4 Rb3 (39...Rb3 40.Ba5 Nd4–+; worse is 39...Nf4 40.d5–+) 0–1. Taulien,Hans_Juergen (2350) – Riemer,Wolfgang (2420), remoteschach.de, 2004.

7.Nh4 Bg6 8.0–0 Ng4 9.g3 (9.Ng6? Bh2 10.Kh1 hg6 11.Bg4 Be5 12.Bh3 Bb2–+) 9...Nh2 10.Re1 Qg5 11.Kg2 Be4 12.Kh3 h5 (12...Bf5 13.Nf5 Qf5 14.Kg2 h5+–) 13.f4+/– Qe7 (13...Ng4 14.fg5 Nf2 15.Kh2 Nd1 16.Bd1+–) 14.Kh2+– Rg8 (14...Rh7 15.Nc3+– (15.Bh5?! g5+=)) 15.d3 (15.Bh5 g5 16.Ng2 Bg2 17.Kg2 gf4 18.ef4 Bf4+/–) 15...g5+/– 16.de4 gf4 (better is 16...gh4!? 17.Bh5 hg3 18.Kg2 a5+–) 17.e5 (17.ef4?! Bf4 18.Ng2 Bg3 19.Kh1 Be1 20.Qe1 de4+/–) 17...Qg5 18.Rg1 fg3 19.Kh3 (19.Kg2 Qh4 20.Rh1 Qe4 21.Bf3 Qe3+–) 19...Bc7 (better is 19...Be5 20.Be5 Qe5+–) 20.Nf3 Qe3 21.Qd2 Qe4 22.Kg2 Nd7 23.Bd3 Qg4 24.Rh1 Rh8 Black prepares h4 25.Rh4 Qg8 26.Nc3 Bd8 27.Rh3 h4 28.Rah1 Rh5 29.Ne2 Bg5 30.Ng5 Rg5 31.Rh4 0–0–0 32.b5 c5 33.Rh8! Qg7 34.Rd8 Kd8 35.Qa5 b6 36.Qa7 Kc8 37.Qa8 Nb8 38.Nc3 Qe5 39.Na4 (39.Na4 d4 40.Rh8 Qh8 41.Nb6 Kd8 42.Qb8 Ke7 43.Qh8 Rg4 44.Qe5 Kf8 45.Qc5 Kg7 46.Nd7 f5 47.Qe7 Kg6 48.Nf8 Kh5 49.Qh7 Kg5 50.Qg6 Kf4 51.Bc1 Ke5 52.Qe6#) 1–0. Taulien,Hans_Juergen (2350) – Kapfenstein,Armin (1720), remoteschach.de, 2003.

7.Nh4 Bg6 8.f4 0–0 9.0–0 Nbd7 10.Ng6 hg6 11.c4 dc4 12.Bc4 e5 13.fe5 Ne5 14.Be2 Qc7 15.Qc2 Rfe8 16.h3 Rad8 17.Nc3 Qe7 18.Ne4 Ne4 19.Qe4 Qg5 20.Qc2 Qg3 21.Qc3 f6 22.e4 Nf7 23.Qg3 Bg3 24.d3 Be5 25.Rab1 Bb2 26.Rb2 Ne5 27.Rb3 Rd4 28.Kf2 Red8 29.Ke3 g5 (30.b5 cb5 31.Rb5 Nd3=). SkyNet – Mely, ChessWorld.net, 2006.

6.a3 Nbd7

7.0–0 Bd6 8.Nc3 0–0 9.Nh4 Bg6 10.f4 a5 11.b5 c5 12.Ng6 hg6 13.Rf3 d4 14.Na4 e5 15.Rh3 Qe7 16.Bc4 Rfe8 17.Qf3 Nf8 18.Nb6 Rad8 19.Nd5 Nd5 20.Bd5 e4 21.Qf2 Bf4 22.Bb3 Be5? (better is 22...Bh6 23.Rf1 Ne6=) 23.Bf7!+– Qf7 24.Rh8! Kh8 25.Qf7 b6 26.Rf1 Re6 27.ed4 cd4 28.a4 Rde8 29.Qb7 Nh7 30.Rf7 Ng5 31.Rd7 e3 32.de3 de3 33.Be5 Re5 34.Rd1 e2?? (34...Nh3 35.gh3 Rg5 36.Kh1 e2+=) 35.Re1+/– R5e6 36.c4?? (better is 36.Qc7!?+–) 36...Rd8 37.h3 Kh7 38.Qc7?? (38.Kh2 Rd1 39.Re2 Re2 40.h4–+) 38...Rd1–+ 39.Qg3 Ne4 40.Qh4 Kg8 41.Kh2 Re1 42.Qe1 Nc5 43.h4 Nd3 44.Qg3 e1Q 45.Qe1 Re1 0–1. paolo2504 (1970) – riri64 (1950), gameknot.com, 2010.

7.0–0 Bd6 8.d3 Qc7 (8...a5 9.Nc3+=) 9.c4 Ng4 (9...dc4 10.dc4 0–0–0 11.Nbd2=) 10.h3= Nh2 11.Nh2 (11.Bg7? Rg8 12.Bh6 Rg6–+ (12...Nf1?! 13.Kf1 dc4 14.e4–/+)) 11...Bh2 12.Kh1 Be5 13.Be5 Qe5 (worse is 13...Ne5 14.f4 Nd7 15.Nc3+=) 14.Nd2 Nf6 (14...0–0 15.Qc2=) 15.d4 (15.cd5 ed5 (15...Qd5? 16.e4 Ne4 17.de4 Be4 18.Ne4 Qe4 19.Bd3+–; worse is 15...cd5 16.Qa4 Ke7 17.Rfc1+/–) 16.Nf3 Qd6=) 15...Qd6= 16.Kg1 0–0 17.Rc1 White plans c5 17...Ne4 18.Ne4 Be4 19.Bd3 f5 20.Re1 a5 21.c5 Qd7 22.ba5 Ra5 23.Rc3 e5 (23...Qc7 24.Bf1 f4 25.f3=) 24.de5 (24.Be2 f4+=) 24...Qe7= 25.Be4 fe4 26.Qd4 Rfa8 27.Rb1 Ra4 28.Rb4 Rb4 29.Qb4 (worse is 29.ab4 Ra1 30.Kh2 Ra2–/+) 29...Qe5 30.Qb2 (30.Rb3 Rb8=) 30...Ra7 (30...Ra5 31.Qb7 Qc3 32.Qc8 Kf7 33.Qc7 Kf8 34.Qd8 Kf7 35.Qc7 Kf6 36.Qf4 Kg6 37.Qg4 Kh6 38.Qh4 Kg6 39.Qg4 Kf7 40.Qf4 Kg8 41.Qb8 Kf7 42.Qc7=) 31.Qb4 Kf8 ½–½. Scholz,Sascha (2205) – Lisakowski,Christof (2260), RS6D – A00 – Sokolsky Alt–1, 2004.

7.0–0 Bd6 8.Nh4 Bg6 9.f4 0–0 10.Nc3 (10.Ng6 fg6 11.c4 c5=) 10...a6 (10...b5 11.Ng6 fg6 12.a4=) 11.Na2 b5 12.Nc1 (12.a4 Qc7=) 12...c5 13.Ng6 hg6 14.Nd3 c4 15.Ne5 Ne4 16.Nd7 Qd7 17.Qe1 Qc7 18.Rf3 (18.Rd1 c3 19.Bc3 Nc3 20.dc3 Rfc8=) 18...a5+= 19.Rh3 f5 20.Bf3 (20.Qh4!? c3 21.dc3 Nc3 22.Bf1 ab4 23.Qh7 Kf7 24.Rg3 ba3 25.Qg6 Kg8 26.Qe6 Rf7 27.Bc3 Qc3 28.Qd5 Qa1 29.Qa8 Bf8 30.Rg6=) 20...ab4+= 21.ab4 Ra1 22.Ba1 Bb4 23.Be4 (23.Qh4 c3 24.Qh7 Kf7+=) 23...de4 24.Be5 Qd8 25.Bd4 Be7 26.Qa1 Bf6 27.Rg3 g5 28.Bf6 Qf6 29.Qf6 Rf6 30.c3 (30.fg5!? Rg6 31.Kf2+=) 30...gf4–+ 31.ef4 Rf8 32.Re3 Rd8 33.Re2 Kf7 34.Kf2 Kf6 35.Ke1 e5 36.fe5 Ke5 37.Kf2 g5 38.h3 f4 39.Kf1 Rd3 40.Rf2 e3 41.de3 Rc3 42.ef4 gf4 43.Rb2 Rb3 44.Re2 Kd4 (44...Kd4 45.Re8 b4–+) 0–1. Gretencord,Ulrich (1785) – Peetoom,Frank (1775), DESC, 2001.

7.d3 a5 8.b5 =.

7.d3 Qc7 8.Nbd2 Bd6 9.c4 h5 (9...0–0 10.c5 Be7 11.Nh4+=) 10.c5 Be7 11.h3 (11.e4 de4 12.Ne4 Ne4 13.de4 Be4+=) 11...e5 12.Nb3 (better is 12.d4 e4 13.Ne5=) 12...Bd3?? (better is 12...0–0–0+=) 13.Bd3+– (13.Qd3?! e4 14.Qd2 ef3 15.Bf3 0–0–0=) 13...e4 14.Nfd4 (14.0–0 ed3 15.Nbd4 0–0–0+=) 14...ed3= 15.Nf3 (15.Nf5 d2 16.Nd2 g6 17.Ne7 Ke7+/–) 15...Ne4 (15...d2 16.Nbd2 0–0–0 17.0–0=) 16.Qd3= Rg8 17.Nbd2 f5 (17...Nd2 18.Nd2 Nf6 19.Rd1=) 18.Qc2 0–0–0 19.Nd4 Rde8 (19...Nd2 20.Nf5 Nc5 21.Qd2 Nb3–+) 20.Nf5 Ndf6 (20...g6 21.Ng7 Nd2 22.Ne8 (22.Kd2?! Rd8+/–) 22...Re8 23.Qd2+–) 21.Nf3 Bd8 22.Rg1 g6+= 23.N5d4 Nd7 24.Nb3 Bf6+= 25.Bf6 Ndf6 26.0–0–0 Re7 27.Rdf1 Nd7 28.Nbd2 Nd2 29.Nd2 Qe5 30.Qb2 Qf5 31.Qc2 Qe6 32.Qc3 Ne5 33.Qd4 Qf5 34.g4 hg4 35.hg4 Qf7 36.f4 Nc4 37.Nc4+/– dc4 38.f5 Rd7 39.Qf4+/– g5 The passed pawn on f5 quickly leads to threats 40.Qf3 Rd3 41.Rg2 Qf6 42.Ra2 Qc3 43.Kb1 Qb3 44.Rb2 Qa3 45.f6 c3 46.Qf5 Kb8 Do you see the mate threat? 47.Qe5 Ka8 48.Rbf2 Qb3 49.Ka1 Rgd8 50.Rb1+= Rd1 The mate threat is Qxb1 (50...Rd1 51.Qe4 Qf7+=). Goede,Olaf – Gesterkamp,Rainer, Schleswig Holstein–chB, 1989.

7.d3 Bd6 8.Nbd2 (8.Nh4 0–0=) 8...0–0 (8...e5 9.c4=) 9.Nh4 Bg6 (9...a5 10.Nf5 ef5 11.ba5=) 10.Ng6 (10.c4 b5=) 10...hg6 (10...fg6 11.c4=) 11.0–0 (11.c4 b5+=) 11...Qc7 (11...a5 12.c3=) 12.g3 (12.Nf3 a5+=) 12...a5= 13.ba5 (13.c3 e5=) 13...Ra5 14.Nb3 (14.c4 Rfa8=) 14...Ra4 15.Qc1 Rfa8 Increasing the pressure on the isolated pawn on a3 16.c4 dc4 17.dc4 Ne4 (17...Qb6 18.Nd2=) 18.Bd1 (18.Qc2 Nec5=) 18...R4a6 (18...Ne5 19.c5 Be7 20.Bc2=) 19.Bc2 (19.Bf3 Ng5 20.Be2 c5=) 19...Nec5 20.Nc5 Nc5 21.Rd1 Bf8 (21...b6 22.Qd2 Be7 23.Rab1=) 22.Qd2 (22.f4 b6=) 22...Na4 23.Ba4 Ra4 24.Qc3 Qa5 The pressure on the isolated pawn grows 25.Qd4 (25.Qb3 Qa6= (worse is 25...Ba3 26.Ba3 Ra3 27.Ra3 Qa3 28.Qb7+=)) 25...Qc5+= Attacks the isolani on c4 26.Qd7 (26.Qc5 Bc5 27.Rd7 b6=) 26...Qc4 (26...b6 27.Rab1+=) 27.Qb7 Qb5 28.Qb5 cb5 29.Rab1 b4 (29...f6 30.h4=) 30.ab4 Rb4 31.Bd4 ½–½. Emberger,Rene – Kreisl,Robert (2125), Graz op, 2002.

7.Nd4 Bg6 8.f4 Bd6 (8...c5 9.bc5 Bc5 10.Nb3=) 9.Nc3 (9.0–0 a5=) 9...e5 (9...a5 10.b5 c5 11.Nf3=) 10.fe5 Be5 (10...Ne5 11.0–0=) 11.Nf3 Bd6 12.0–0 Qc7 13.Na4 (13.h3 Nh5=) 13...Be4+= 14.Kh1 (14.h3!?+=) 14...Bf3–/+ 15.gf3 Bh2 16.f4 Bg3 17.Bd3 (17.Rf3 Ne4 18.Qg1 Qd8+=) 17...h5–+ 18.Qf3 (18.c4 Qd6–+) 18...h4 19.Bf5 Rh6 20.d3 (20.Bh3 Qd6–+) 20...g6 (20...Qd6 21.Bd4–+) 21.Bh3–/+ Kf8 (21...Qd6 22.Bd4–/+) 22.c4 Re8 (22...dc4 23.dc4 Ke7 24.Nc3+=) 23.Nc5 Nc5 24.bc5 Nd7 25.cd5+= Nc5 26.Be5= Qa5 27.dc6 bc6 28.Rfd1 Rd8 29.Qc6 With the decisive threat Bc7. 29...Qb6 30.Qb6 ab6 31.d4 Ne4 32.Rdb1 g5 33.Bc7 Re8+= 34.Kg2 gf4–/+ 35.ef4 Nd2 Do you see the mate threat? 36.Be5 Nb1 37.Rb1 Ra8 38.d5 Rg6 39.Bf5–/+ Bf4 40.Bg6 Be5 41.Rf1 f6 42.Rf3 Ke7 43.Bf5 Rg8 Black launches an attack 44.Kf2 Rg3 45.Ke2 Kd6–+ 46.Be6 b5 47.Bf7 h3–+ 48.Rg3 Bg3 49.Kf3 h2 50.Kg2 Kc5 51.Be6 Bd6 52.Bd7 Kc4 Black plans b4 53.a4? b4 54.a5 Kd5 55.a6 Bb8 56.Be8 Kc4 57.a7 Ba7 58.Kh2 b3 59.Kg3 Kc3 (59...Kc3 60.Bg6 b2–+) 0–1. Gombac,Jan (2245) – Kovacic,Peter (2210), SLO–chT1z Bled, 2000.

7.h3 h6 8.d3 Be7 9.e4 (9.0–0!?=) 9...de4–/+ 10.de4 Be4 11.Nbd2 Bh7 12.Nc4 0–0 13.Qc1 Qc7 14.Nce5 Ne5 15.Be5 Qd7 16.Qb2 Rad8 17.Rd1 Qc8 18.0–0 Rd1 19.Rd1 Rd8 20.Nd4 Rd5 21.f4 Rd7 22.c4 c5 23.Nb5 (23.bc5 Qc5 24.a4–/+) 23...a6?? (better is 23...Rd1 24.Bd1 cb4 25.ab4 Qc4 26.Na7 Qb4 27.Qb4 Bb4–+) 24.Nc3 b6 25.Rd7 Qd7 26.b5 a5 27.a4 Ne8 28.f5? (better is 28.Nd1!?–/+) 28...Bf5–+ 29.Bg3 Bf6 30.Qc1 (30.Bf2–+) 30...Qd4 31.Bf2 Qc3 32.Qf4 (32.Qf1–+) 32...Qa1 33.Kh2 (33.Bf1 Bd3 34.Be3 Bg5–+) 33...Be5 34.Bg3 Bf4 35.Bf4 Qa4 36.Bf3 Nf6 37.Bc7 Qc4 38.Bb6 Qb5 39.Bc7 a4 40.h4 a3 0–1. deanfromblue – borde (1665), Challenge from deanfromblue, 2013.

7.Nh4 Bg6

8.0–0 Be7 9.c4 e5 (9...dc4 10.Ng6 hg6 11.Bc4=) 10.cd5 cd5 11.d4 e4 12.Nc3 0–0 13.Ng6 hg6 14.Qb3 Nb6 15.f3 ef3 16.Rf3 Rc8 17.Rc1 Nc4? (better is 17...Bd6+=) 18.Nd5!+– Nd5 (18...Qd5 Decoy theme: d5 19.Bc4) 19.Bc4 (19.Bc4 Nf6 20.Qd3+–) 1–0. Hebels,Alex (1970) – Fricker,Thomas (2155), IECG, 1999.

8.0–0 Be7 9.f4 Qc7 =.

8.0–0 Be7 9.f4 Ne4 10.Ng6 hg6 11.Bg7 Rh7 12.Bb2 Qc7 13.c4 Bf6 14.Bf6 Nef6 15.cd5 Nd5 16.Qc2 0–0–0 17.Nc3 N7f6 18.Nd5 Nd5 19.b5 cb5 20.Rac1 a6?? (better is 20...Qc2 21.Rc2 Kb8 22.Bb5 a6+/–) 21.Qb2+– 1–0. Speisser,Patrick (2120) – Vermaas,Fred, IECG, 2004.

8.Ng6 hg6 9.c4 Bd6 10.cd5 ed5 11.f4 Rh7 12.0–0 Qe7 13.h3 Nh5 14.Qe1 f5 15.Bd4 Nhf6 (15...g5 16.Nc3=) 16.Qg3 Kf7 17.d3 Nh5 18.Qf2 Nhf6 19.Nd2 a6 20.Nf3 Kg8 21.Ng5 Rh8 22.Rab1 Nh7 23.Nf3 Nhf6 24.Qg3 Rh6 25.Rf2 Nh5= 26.Qh2 Nhf6 27.Qg3 Nh5 28.Qh2 Nhf6 29.Qg3 ½–½. Caissa – 300SPARTANS, Live Game Caissa's Web, 2004.

8.0–0 a5

9.b5 cb5 10.Ng6 hg6 11.Bb5= Qc7 12.h3 g5 13.d3 Bd6 14.Ra2 Rh4.

9.b5 Bd6 10.Nc3 Qc7 (10...Ne4 11.g3 Nc3 12.Bc3 0–0 13.f4 Qe7 14.a4 Be4; 10...e5 11.Ng6 hg6 12.a4 Rc8 13.Rb1 c5 14.h3 Nb6; 10...c5 11.f4 d4 12.Na4 Qc7 13.Ng6 hg6 14.Bf3 g5) 11.f4 d4 12.ed4 Bf4= 13.g3 Bd6 14.bc6 bc6.

9.b5 Bd6 10.f4 a4 11.Nc3 Qc7 12.Rb1 d4 13.ed4 Bf4 14.g3 Bd6 15.Bf3 Nb6 16.bc6 bc6 17.d3 Nbd5 18.Nd5 Nd5 19.Qe2 0–0 (19...Rb8 20.Ng6 hg6 21.c4+=) 20.c4+= Nf6 21.Bc1 Rab8 (better is 21...Be7!?+=) 22.Rb8+/– (22.Rb8 Rb8 23.c5 Bg3 24.Ng6 (worse is 24.hg3 Qg3 25.Ng2 Rb3+=) 24...hg6 25.hg3 Qg3 26.Bg2+/–; 22.Ng6?! Rb1 (worse is 22...hg6 23.Rb8 Rb8 24.c5+/–) 23.Nf8 Bf8= (worse is 23...Kf8 24.c5+/–)) 1–0. Baumann,Heinz (2355) – Schilling,Hans (2000), remoteschach.de, 2003.

9.b5 Bd6 10.f4 cb5 11.Ng6 hg6 12.Bb5= g5 13.Be5 Qe7 14.d4 Rc8.

9.b5 Bd6 10.f4 Nb6 11.Nc3 (11.bc6 bc6 12.Nc3 Rb8= 13.Rb1 a4 14.Na2 Be4; 11.f5 ef5 12.Nf5 Bf5 13.Rf5 Qc7 14.h3 Ne4) 11...Rb8 (11...c5 12.Rc1= d4 13.Ng6 hg6 14.Nb1 g5; 11...Qd7 12.bc6 bc6 13.Rb1 Rb8 14.Nb5 Be7) 12.f5 (12.Ra2 Nfd7 (12...Qc7 13.d3 Rd8 14.Qd2 Bh5) 13.Ng6 hg6= 14.h3 Qh4) 12...Qc7 (12...ef5 worse is 13.Ng6 (13.Nf5 Bf5 14.Rf5= Qc7) 13...hg6 14.h3 Be5+= (14...Qc7–/+)) 13.h3 (13.fg6 Bh2 14.Kh1 hg6) 13...ef5 14.Nf5 Bf5 15.Rf5 0–0 (15...Be5 16.Rb1=) 16.Rf6+= gf6 17.Bd3 f5 18.Bf5 f6 19.d3 (19.e4 Nc4 20.Bc1 Be5=) 19...Bc5 20.Qf3 (20.d4 Nc4 21.Bc1 Bb6=) 20...Rbe8 (20...Rfe8 21.d4 Nc4 22.Bc1=) 21.Re1 (21.Bc1 Re7=) 21...Qe7 22.bc6 bc6 23.Nb1 Qc7 24.Nd2 Bd6 25.Rb1 Bc5 26.d4 Bd6 27.e4 Kh8 28.Rf1 Qg7 29.g4 a4= 30.Kh1 Qc7 31.Qe3 Rg8 32.Rf2 Qg7 33.Kg2 Rb8 34.Qf3 Qe7 35.Kg1 Na8 36.Bc1 Nc7 37.ed5 cd5 38.Kg2 Qe1 39.Rf1 Qh4 40.c4 h5 41.Qf2 Qf2 42.Rf2 Bf8 43.cd5 hg4 (43...hg4 44.hg4 Bh6=). Schulz,Hans_Juergen (2305) – Lisakowski,Christof (2260), RS6D – A00 – Sokolsky Alt–1, 2004.

9.Ng6 hg6 10.b5 Bd6 11.h3 Rc8 12.f4 cb5 13.Bb5 Qb6 14.a4 Bc5.

5.Be2 h6

6.0–0 e6 7.a3 Nbd7 8.d4 Qc7 9.Nbd2 Bd6 10.h3 (10.c4 0–0=) 10...e5 (10...b5!?+=) 11.de5+= Ne5 12.Ne5 (12.c4 Nf3 13.Bf3 Bd3 14.Bf6 Bf1 15.Bg7 Rg8 16.Nf1 Rg7 17.cd5 c5+/–) 12...Be5= 13.Be5 Qe5 14.c4 0–0 15.Qb3 Rfd8 16.Nf3 Qe7 17.Nd4 Bg6 18.c5 Ne4 19.Rad1 a5 20.Bf3 ab4 21.ab4 Ng5 22.Rfe1 (22.Be2!?=) 22...Nf3+= 23.Nf3 Bh5 24.Rd4 Bf3 25.gf3 Qe5 26.f4 Qh5 27.Kg2 Re8 28.Qd1 Qf5 29.Qg4 Qf6 30.Rg1 Ra2 31.Kf3 Ra3 32.Rgd1 Re6 33.h4 Qe7 34.h5? Ree3!–+ 35.fe3 Qe3 36.Kg2 Ra2 37.Kh1 f5! The mate threat is fxg4 38.R4d3 Qd3! 39.Rd3 fg4 40.Rd4 Kf7 41.f5 g3 42.Rg4 Rh2 43.Kg1 Rh5 44.Rg6 Rf5 45.Rd6 Ke7 46.Rg6 Kf8 47.Rd6 Re5 48.Kg2 Re2 49.Kg3 Rb2 50.Kg4 Rb4 51.Kf5 Ke7 52.Re6 Kf7 53.Rd6 g6 54.Rg6 Rf4 (54...Rf4 55.Kf4 Kg6–+) 0–1. Manzanilla,R – De Vita,G, Italy, 1998.

6.a3 e6 =.

6.h3 e6 7.a3 Nbd7 8.0–0 Be7 9.d4 (9.Nc3 e5=) 9...0–0 10.Bd3 Bd3 11.Qd3 Qc7 (11...a5 12.ba5 Qa5 13.c4+=) 12.Nbd2 Bd6 (12...a5 13.ba5 Qa5 14.c4+=) 13.c4= Rfe8 14.c5 Be7 15.e4 de4 16.Ne4 Ne4 17.Qe4 Bf6 18.Ne5 Ne5 19.de5 Black gets strong play along the open d–file 19...Bg5 20.Bc1 (20.f4 Be7+=) 20...Bc1= 21.Rac1 Rad8 22.Rcd1 Rd5 23.f4 Red8 24.Qf3 R8d7 25.Rfe1 Qd8 26.Rd5 Rd5 27.Kf2 Rd3+= 28.Re3 Re3 29.Qe3+= Qd5 30.g4 g6 31.h4 White intends g5 31...Qd8 32.g5 h5 33.Ke2 Qd5 34.Qd3 Qd3 35.Kd3+/– Kf8 36.Kc4 Ke7 37.a4 White plans b5 37...Kd7 38.b5 Kc7 39.a5 White prepares b6 39...a6 40.b6+/– ½–½. Ruhle,Ernst_Albrecht (1605) – Berchten,Eduard, 07sen.Weggis SUI op, 2006.

5.Nh4 Bg4

6.f3 Bd7 7.a3 =.

6.f3 Bd7 7.g4 =+.

4.Nf3 Nbd7

5.a3 c5 6.c4 cb4 7.ab4 e6 8.Be2 (better is 8.c5!?=) 8...Bb4 9.cd5 ed5 10.Qa4 a5 11.0–0 0–0 12.Nd4 Bg6 13.Nb3 Rc8 (13...Bc2!? 14.Bd4 Bc5–/+) 14.Na5= Ba5 15.Qa5 b6 16.Qb5 Rc5 17.Qb3 Qc7 18.Bf6 Nf6 19.Nc3 The isolani on d5 becomes a target 19...Rc8 20.Ba6 Rb8 21.Rfc1 Ne4 22.Qb2 h6 23.f3 Nc3 24.Rc3 (worse is 24.dc3 Re8–/+) 24...Rc3 25.Qc3 Qc5 26.Rc1 Qa5 27.Bd3 Qc3 28.Rc3 (28.dc3?? Bd3 29.Rd1 Bc4–+) 28...Bd3 29.Rd3 Rd8 30.e4 d4 31.Rb3 Rd6 32.Kf2 f6 33.Ke2 Kf7 34.Kd3 Ke6 35.Rb4 Ke5 36.g3 g5 37.Rb5 Ke6 38.Kc4 h5 39.Rd5 Rd5 40.ed5 Ke5 41.d3 b5?? (41...h4 42.gh4 gh4 43.h3+=) 42.Kb5 (better is 42.Kc5 h4 43.d6+–) 42...Kd5= 43.Kb4 f5?? (43...Ke5 44.Kc4–/+) 44.Kb5?? (44.f4 g4 45.Kb5+–) 44...f4?? (better is 44...Ke5 45.Kc5 f4 46.gf4 Kf4 (46...gf4?? 47.h4+–) 47.Kd4 h4=) 45.gf4+– gf4 46.h4 Kd6 47.Kc4 Ke5 48.Kc5 1–0. madik – beyers, gameknot.com, 2013.

5.a4 c6 6.Be2 Qc7 7.Nd4 (7.Nh4!? Bg6 8.f4=) 7...Bg6+= 8.b5 e5 9.bc6 bc6 (worse is 9...ed4 10.cd7 Nd7 11.Bd4 Bc2 12.Qc1+=) 10.Nb3 c5 11.c4 d4 12.d3 Rb8 13.N1d2 de3 14.fe3 Be7 15.0–0 0–0 16.Bc3 Ne8 17.Nf3 e4 18.de4 Be4 19.Nbd2 Bg6 20.Ra2 Nd6 21.Qa1 Bf6 22.Bf6 Nf6 23.Nh4 Rfe8 24.Ng6 hg6 25.Qc3 Nf5 26.e4 Nd4 27.Bf3 g5 28.Re1 Re7 29.Rb2 Rbe8 30.h3 Qe5 31.Qa3 Nd7 32.Reb1 Qf4 33.Nf1 (33.Bg4!?=) 33...Ne5–/+ 34.Rb7?? (better is 34.Rf2–/+) 34...Nef3–+ 35.gf3 Nf3 36.Kh1 Re4 (36...Qe4 37.Ng3 Rb7 38.Ne4 Rb1 39.Kg2 Nh4 40.Kf2 Re4 41.a5–+) 37.Qc5 (37.R7b2–+) 37...Re2 38.R7b2 Nd2 39.Rd2 Qf3 (39...Qf3 40.Kg1 Qg2#) 0–1. Ruehl,Volker (1955) – Rotfuss,Oliver (2135), Baden Wuerttemberg–chB, 2005.

5.a4 Bg4 6.Be2 Bf3 7.Bf3 e5 8.b5 c5 9.0–0 Bd6 10.c4 Nb6 (10...e4!? 11.Be2 Qc7+=) 11.cd5 Nbd5 (11...Nfd5? 12.a5 Nc4 13.Bd5 Nb2 14.Qb3+–) 12.d3 0–0 13.Nd2 Re8 14.Qb3 Bc7 15.Rac1 Qd6 (15...Bb6 16.Ne4 Qe7 17.Qa3 Ne4 18.de4+=) 16.g3 (better is 16.Bd5!? Nd5 17.Ne4+–) 16...Rad8+= 17.Rfd1 b6 18.Ne4 Ne4 19.Be4 Qe6 20.Qc2 f5 21.Bg2 f4 22.ef4 ef4 23.Re1 (23.d4 Nb4 24.Qc4+=) 23...Qg6?? (better is 23...Qe1 24.Re1 Re1 25.Bf1 fg3 26.hg3 Bg3+=) 24.Qc4 Re1 25.Re1 Qf7 26.Bd5 Rd5 (26...Qd5? 27.Qd5 Rd5 28.Re7+–) 27.Re8 Qe8 28.Qd5 Qf7 29.Qa8 Qf8 30.Qa7 Qf7 31.Qa8 Qf8 32.Qf8 Kf8 33.Kg2 fg3 34.fg3 Kf7 35.Kf3 g6 36.Ke4 Ke6 37.d4 cd4 38.Bd4 h6 39.h3 h5 40.g4 hg4 41.hg4 g5? 42.Be3 Bd8 43.Bg1 Bc7 44.Bf2 Kf6 45.Kd5 Bd8 46.Bd4 Ke7 47.Kc6 Ke6 48.Bb6 Bb6 49.Kb6 Ke5 50.a5 Kf4 51.a6 Kg4 52.a7 Kh4 53.a8Q g4 54.Qg2 g3 55.Kc5 (55.Kc5 Kg4 56.b6 Kh5 57.Qg3 Kh6 58.b7 Kh7 59.b8Q Kh6 60.Qh8) 1–0. Nikolic,Jovane (1715) – Vidal,Gabriela Barion, Iracemapolis BRA, 4th Open, 2013.

5.b5 h6 6.a4 e6 7.Be2 Bd6 8.Nd4 Bg6 9.f4 Ne4 (9...Qb8 10.0–0=) 10.0–0 0–0 (10...e5 11.fe5 Be5 12.a5=) 11.Nc3 (11.a5 a6=) 11...Qe7 (11...Nc3 12.Bc3 Nc5 13.a5=) 12.Ne4 de4 (12...Be4 13.a5=) 13.Qe1 (13.Bc4=) 13...f5 (13...e5!? 14.fe5 Qe5+=) 14.Bc4+/– Bf7 15.Qg3 g5 16.Qh3 Kh7? 17.fg5+– Qg5 18.Ne6 Be6 19.Be6 Ne5 20.Bf5 Kg7 21.Be4 Kg8 22.Qe6 Nf7 23.Bh7! Kh7 24.Rf7 Rf7 25.Qf7 (25...Qg7 26.Qg7) 1–0. pcmvr (2560) – gphillips (2240), net–chess.com, 2006.

5.c4 a5 6.b5 dc4 7.Bc4 Nb6 8.Be2 a4 9.d4 (9.0–0!?+=) 9...e6+= 10.0–0 a3 11.Bc3 Nbd5 12.Qb3 Bd6 13.Rc1 0–0 14.Nbd2 Ne4 (14...Qe7!?+=) 15.Ne4= Be4 16.Nd2 Bg6 (16...f5 17.Nc4 Qg5 18.Bf1–/+) 17.Nc4+= Be4 18.Nd6 Qd6 19.Bd2 Rfc8 20.Rc5 b6 (20...Rd8!?+=) 21.Rc6+/– Qd7 22.f3 Bg6 23.Rac1 Ne7 24.R6c4 e5 25.Bf1 (25.Bb4!? Nd5 26.Ba3 e4+–) 25...e4 26.f4 Bf5 27.Qc2 (27.Ra4 Ra4 28.Qa4 Be6+/–) 27...Qb5 28.Rc7 Qb2 29.Rc8 (29.Qd1 Nd5 30.R7c2+–) 29...Rc8= 30.Qa4 h6 (30...Qd2?? 31.Rc8 Bc8 32.Qe8) 31.Rc8 Nc8 (31...Bc8!? 32.Bb4 Nf5=) 32.Bb4+/– Qa2 33.Qa3 (33.Ba3?! Qd2 34.Qb3 Be6=) 33...Be6 34.Qa2 Ba2 35.Ba6 Na7 36.Bb7 f5 37.Be7 (37.d5 Kf7+/–) 37...Be6 (37...Nb5 38.d5 Nc3 39.d6=) 38.d5+/– Bd7 39.Bd8 b5 40.Bb6 Nc8 41.Bc5 Kf7 42.Kf2 Ne7 43.Ke2 g5 44.g3 Bc8 45.Ba8 Ng8 ½–½. Raue,Thorsten (1840) – Beckmann,Christian (1815), Verbandsliga Muensterland, 2010.

5.c4 c5 6.bc5= Nc5 7.d4 (7.Bf6 ef6 8.d4 Ne4=) 7...Ncd7 (7...Qb6 8.Bc3 Nce4 9.Ne5=) 8.c5 (8.Qb3 e6=) 8...Qc7 (8...e6 9.Nc3=) 9.Bb5 (9.Nc3 b6=) 9...Qa5 (9...Bb1!? 10.Bd7 Nd7 11.Qb1 b6=) 10.Nc3+= Ne4 (10...Rc8!?+=) 11.Qb3+/– Rb8 (11...Rc8 12.0–0 Nef6 13.Ne5+–) 12.0–0 (12.Ne5 Nef6+/–) 12...Nef6+– 13.Nd5 Be6? 14.Nf6 gf6 15.Bd7 Bd7 16.Qa3 Qc7? 17.Qa7+– Bc6 18.Nh4 Bh6 19.Nf5 Rg8 20.f3 Bg7 21.Qb6 Qd7 22.e4 e6 23.Nd6 Ke7 24.Rfe1 Bh6 25.d5! (25...Qd8 26.Qd8 (< 26.dc6 Qb6 27.cb6 Kd6+–) 26...Rgd8 27.dc6 bc6 28.Bc1 Bc1 29.Rec1+–) 1–0. Iosif,Daniela – Kleinschmidt,Karlheinz, Giessen op, 1993.

5.c4 e5 6.c5 (6.Ne5!? Bb4 7.Nd7 Bd7 8.cd5+=) 6...Bg4= 7.Be2 e4 8.Nd4 Be2 9.Ne2 c6 10.a4? (better is 10.0–0!?+=) 10...a5–+ 11.Bc3 ab4 12.Bb4 Bc5 13.Bc5 Nc5 14.0–0 Nd3 15.Nbc3 0–0 16.h3 Qd7 17.Nc1 c5 18.Nd3 ed3 19.Qb1 c4 20.Qb5 Qb5 21.ab5 b6 22.f3 Rfd8 23.g4 g5 24.Kg2 Kf8 25.Kg3 Ke7 26.Rfb1 Kd6 27.Kf2 Ra5 28.Ra5 ba5 29.Ra1 Ra8 30.Na4 Nd7 31.b6 (31.e4–+) 31...Kc6 32.Rb1 Rb8 33.f4 f6 (33...Nb6?! 34.fg5 Rb7 35.Nc3–+) 34.Kg3 Nb6 35.Nc3 Rd8 36.fg5 fg5 37.h4 h6 38.h5 a4 39.Ra1 Ra8 40.Kf2 Kc5 41.Na2 d4 42.ed4 Kd4 43.Rb1 Nd5 44.Rb7 a3 45.Ke1 Ra6 46.Rd7 Kc5 47.Rf7 Nf6 48.Rc7 Kd4 49.Rg7 Ng4 50.Rd7 Kc5 51.Rc7 Rc6 52.Ra7 Rb6 53.Ra3 Rb1 0–1. Hal1958 – WhiteKnight, playchess.de, 2005.

5.c4 g6 6.a3 dc4 7.Bc4 Bg7 8.Nc3 0–0 9.h3 Nb6 10.Ba2 Ne4 11.d4 Nc3 12.Bc3 Nd5 13.Bd2 c6 14.Rc1 Be4 15.0–0 Nf6 16.Qe2 Bd5 17.Bb1 Ne4 18.Be4 Be4 19.Ng5 Bf5 20.g4 Bd7 21.f4 e5 (21...e6=) 22.Nf3 (better is 22.de5 Qe7 23.Bc3+/–) 22...ed4+= 23.Nd4 Bd4 24.ed4 Qh4 25.Kg2 f5 (25...Be6 26.Qf2 Qe7 27.f5 Bd5 28.Kg1=) 26.Be1 (26.g5!?+=) 26...Qf6+= 27.Bc3 (27.g5 Qf7+= (worse is 27...Qd4 28.Rd1 Qg7 29.Qd3+=)) 27...Rae8–/+ 28.Qc4 Be6 29.Qd3 (29.d5 Bd5 (worse is 29...cd5 30.Qc5 Qh4 31.g5=) 30.Qd5 cd5 31.Bf6 Rf6–/+) 29...Bd5 (29...fg4!? 30.Kg3 gh3 31.d5–+) 30.Kg3–/+ fg4 31.hg4 Re4 32.Qd2 b5 33.Rf2? (better is 33.Rce1 Re1 34.Re1–/+) 33...Rfe8–+ 34.g5 (34.Rcf1–+) 34...Qf5 (34...Re3 35.Rf3 Rf3 36.Kh2 Qf5 37.Qe2 Re2 38.Kg1 Qg4 39.Kh1 Rc3) 35.Rf3 (35.Rcf1 Re3 36.Rf3–+) 35...Re2 36.Qd3 (36.Rcf1 Rd2 37.Bd2 Re2–+) 36...Bf3 (36...Rg2 37.Kg2 Qd3 38.Be1 Qf3 39.Kh2 Qg2) 37.Qf5 gf5 (37...gf5 38.Be1 R8e3–+) 0–1. combijack (1780) – reodoi (1685), gameknot.com, 2011.

5.c4 h6 6.Nc3 (6.a3 e6=) 6...e6 7.a3 (7.cd5 Bb4 8.Nd4 Bg4=) 7...c6 (7...a5 8.ba5 Ra5 9.Nd4=) 8.c5 (8.cd5 Nd5 9.Nd5 ed5=) 8...Be7 9.h3 (9.Be2 e5=) 9...Qc7 (9...e5 10.Be2=) 10.g4 (10.Be2 e5=) 10...Bh7 (10...Bg6 11.d4=+) 11.d3 (11.d4 Ne4=+) 11...0–0–0 12.Bg2 (12.d4 h5 13.gh5 Bf5=) 12...e5 13.g5 hg5–/+ 14.Ng5 Bg6 15.e4 Rh5 16.Bc1 de4 17.Nge4 Rhh8 18.Qe2 Nh5 19.Qg4 Kb8 20.Be3 Nf8 21.0–0–0? f5 22.Qe2 fe4 23.Ne4 Nf4 24.Bf4 ef4 25.Qb2 Ne6 26.Rhe1 Nd4 27.f3 Be4 28.Re4 Bf6 29.Qa2 Nb5 30.Qb3 Nc3 31.a4 Nd1 32.Kd1 Rhe8 33.Kc2 Re4 34.fe4 f3! 35.Bf3 Qh2 36.Kb1 Qd2 (37.Qc2 Qb4 38.Kc1 Qe1 39.Bd1 Qe3 40.Qd2 Qc5 41.Qc2 Qg5 42.Kb1 Qe5–+; better is 36...Rd3! 37.Qg8 Rd8 38.Qd8 Bd8 39.Bg4–+) 0–1. Karlsen,Jan M – Narvoy,Tore, Sandefjord MGP, Gr. B, 2002.

5.d3 e6 6.b5 (6.a3 Bd6=+) 6...h6 (6...a6 7.ba6 Ra6 8.Be2=+) 7.Nbd2 (7.Be2 a6=) 7...Bh7 (7...Bd6 8.Be2=+) 8.a4 Be7 (8...Bd6 9.Be2=) 9.Be2 0–0 10.0–0 Bd6 11.c4 e5 12.cd5+= Nd5 13.Nc4 Re8 14.Nd6 cd6 15.Rc1 a6 16.d4 e4 17.Nd2 Bf5 18.ba6 ba6 19.Ba3 Re6 20.Rc6 Qg5 21.Kh1 Rg6 22.Rg1 Qh4 23.g3 Qe7 24.g4 Nb8 25.Rd6 Rd6 26.gf5 Nc3 27.Bd6 Qd6 28.Qf1 Qf6 29.Ne4?? Ne4 30.Qg2 Nf2 31.Qf2 Nc6 32.Qf3 Ra7 33.Rb1 Ne7 34.Rb8 Kh7+/– 35.Bd3 Rc7 36.Rb1 Kg8 37.Rd1 g5 38.e4 Qd4+= 39.Ba6 Qa4 40.Bd3 Rc3 41.Qe2 Nc6 ½–½. Braun,Walter (2250) – Poesinger,Adalbert, AUT–chT Austria, 1993.

5.Bd3 Bd3 6.cd3 e6 7.0–0 Bb4 8.Ba3 Ba3 9.Na3 0–0 10.e4 de4 11.de4 Ne4 12.Qc2 Ndf6 13.Ng5 h6 14.Ne4 Ne4 15.Qe4 c6 16.Nc4 Qe7 17.Ne5 f5 18.Qf4 Kh7 19.h4 Rad8 20.d3 Qf6 21.h5 Rd5 22.Ng6 Rf7 23.Rfd1 Rd3 24.Rd3 Qa1 25.Kh2 Qf6 26.Qb8 Qg6 27.hg6 Kg6 28.Rg3 1–0. Nautiluschess – Hasselino, ICS blitz, 2000.

5.d4 g6 6.a3 (6.Be2 e6 7.a3 Bd6=) 6...Bg7 (6...a5 7.b5=) 7.Nbd2 (7.Be2 0–0=) 7...0–0 (7...Nb6 8.Be2=) 8.c4 dc4 9.Nc4 (9.Bc4 Nb6=) 9...a6 (9...Nd5 10.Bd3 Bd3 11.Qd3=) 10.Be2 (10.Bd3 Bd3 11.Qd3 Nd5=) 10...Nb6 (10...Be6 11.0–0+=) 11.Nb6+= cb6 12.Nd2 Rc8= 13.Rc1 Qd7 14.0–0 Rc1 15.Qc1 Rc8 16.Qa1 Rc2 17.Rd1 Qc8 18.Rc1+= Ne4 19.Ne4 Be4 20.Bd1 Rc1= 21.Qc1 Qc1 22.Bc1 e5 23.Bb2 ed4 24.Bd4 Bd4 25.ed4 Bd5 26.f3 f6 27.Kf2 Kf7 28.Bc2 Ke6 29.Be4 f5 30.Bd3 b5+= 31.g4 f4 32.Be4 b6 33.h4 Bc4 34.Ke1 Kf6 35.Kd2 h6 36.Kc3 Be2 ½–½. Hollstein,Gerhard – Kratz,Roland, Mehlingen PSB–ch HT3, 1999.

5.Be2 c5 6.Bf6 Nf6 (6...ef6!? 7.bc5 Bc5=) 7.bc5+= Qa5 8.Nd4 Bd7 9.Nb3 Qc7 10.d4 e5 11.Na3 a6 12.c4 Be7 13.cd5 Nd5 14.Nc4 Bb5? (better is 14...e4+/–) 15.Ne5+– Nc3 16.Bb5 Nb5 17.Qf3 0–0 18.0–0 Rad8 19.a4 Na7 20.Rfd1 f6 21.Nd3 Nc6 22.Qf5 Qd7 23.Qd7 Rd7 24.Nf4 Nb4 25.Rab1 Bd8 (25...Na2 26.Ne2 Nb4 27.Na5+–) 26.Ne6 Re8 27.Nd8 Red8 28.Na5 Nd5 29.Rb7 (29.Nb7 Rb8 30.Nd6 Rdd8+–) 29...Rb7 (29...Nc3 30.Rd2 Rb7 31.Nb7+–) 30.Nb7 Rb8 31.c6 1–0. charmedones (1980) – bblchess (1635), gameknot.com, 2014.

5.Be2 Bg4 6.a3 Bf3 7.Bf3 e5 8.d3 c5 9.bc5 Bc5 10.Nd2 0–0! 11.0–0! Re8 12.Rb1 e4 13.de4 de4 14.Bf6 Nf6 15.Be2 Ba3 16.Rb7 Bc5 17.Rb1 a5 18.Qc1 a4 19.Nc4 a3 20.Ra1 a2 21.Qb2 Nd5 22.Ra2 Ra2 23.Qa2 Nc3 24.Qa5 Ne2 25.Kh1 Qa5 26.Na5 f5 27.Nb7 Bb6 28.Nd6 Rf8 29.Nc4 Bc7 30.g3 g6 31.Rb1 Rd8 32.Kg2 h5 33.Rb7 Bd6 34.Na5 Bf8 35.Nc6 Rd2 36.Ne5 Rd6 37.Nf7 Rf6 0–1. sunnyda – ozuo, 2014.

5.h3 Rc8 6.Be2 c5 (6...e6 7.a3=) 7.b5 (7.bc5 Nc5 8.0–0 a6+=) 7...Qc7 8.a4 (8.Nh4 Be6=) 8...e5 9.0–0 (9.g4 Be6=) 9...Bd6 10.Nh4 Be6 11.Nf3 (11.a5 0–0+=) 11...e4 (11...h6 12.d3–/+) 12.Ne1 (12.Ng5!?+=) 12...Ne5 13.d3 Rd8 (13...0–0!?–/+) 14.f4 ef3 15.Nf3 Ng6 (15...Nf3 16.Bf3 0–0 17.Bf6 gf6 18.Bg4+=) 16.Ng5 (16.Bf6 gf6 17.Nc3 Rg8+=) 16...Be5+= 17.d4 Bh2 (17...cd4!? 18.ed4 Bh2 19.Kh1 Bd7–/+) 18.Kh1= c4 19.Ne6 fe6 20.Bf3 (20.Nc3!? 0–0 21.Bg4+=) 20...0–0–/+ 21.Nc3 Nh4 22.Qe2?? (better is 22.Qe1 Bg3 23.Qd2–/+) 22...Nf5–+ 23.Qf2 (23.Qe1 Ne4! 24.Be4 Ng3 (worse is 24...de4 25.Ne4 Bd6 26.Qe2+/–) 25.Qg3 Bg3–+) 23...Ng3 (23...Ne4!? 24.Ne4 de4 25.Rfd1–+) 24.Kh2 Nge4 25.Kg1 Nf2 26.Rf2 Qg3 27.Ne2 Qh4 28.Nf4 Ne4 29.Rff1 Rde8 30.Ba3 Rf4 31.ef4 Qf4 32.Bh5 Qe3 33.Kh2 Qg3 34.Kg1 g6 35.Bf3 Nd2 36.Rf2 Ne4 37.Rff1 Qh4 38.a5 Nd2 39.Bc5 Nf1 40.Rf1 a6 41.Rb1 Qd8 42.Bb6 Qc8 43.c3 Qd7 44.ba6 ba6 45.Bc5 Qa4 46.Bb4 Qc2 47.Re1 Qd2 48.Re2 Qd3 49.Kf2 Kf7 50.Rb2 Rb8 51.Re2 Rb4! 52.cb4 Qd4 53.Ke1 Qc3 54.Kf2 Qb4 55.Bg4 Qd6 56.g3 e5 57.Rb2 Qc5 58.Ke2 Qa5 59.Rb7 Kf6 60.Rh7 Qa2 1–0. Woloszyn,Piotr – Prazmowski,Wlodzimierz, II Otwarte MG Warszawa Poland, 2012.

5.h3 e6 6.a3 Be7 (6...Bg6 7.Nh4=) 7.Nh4 0–0 (7...Bg6!?=) 8.Nf5+= ef5 9.d3 (9.Qf3 g6+=) 9...Re8 (9...c5 10.bc5 f4 11.ef4 Bc5 12.d4 Re8 13.Be2+=) 10.Be2 (10.Qf3 c5=) 10...b5 (10...c5 11.Qd2=) 11.0–0 (11.c4 a5=) 11...a5 (11...c5 12.c4=) 12.c3 (12.c4 c6 13.cb5 cb5+=) 12...c6 (12...Nb6 13.Qc2+=) 13.Nd2= Bd6 14.c4 (14.Nb3!? ab4 15.ab4 Ra1 16.Qa1=) 14...ab4+= 15.ab4 Bb4 (15...Ra1 16.Qa1 f4 17.cd5 cd5 18.e4 Bb4 19.Nf3+=) 16.Nf3 (16.Ra8 Qa8 17.cb5 cb5+=) 16...Qb6 (16...Ra1 17.Ba1 f4 18.ef4+=) 17.cb5 cb5 (17...c5 18.Qc2+=) 18.Qb3= Bd6 19.Nd4 (19.Bd4 Qb7 20.Ra8 Ra8 21.Rb1+=) 19...g6 (better is 19...Ra1!? 20.Ra1 f4 21.Qb5 fe3 22.fe3 Re3 23.Ra8 Bf8 24.Qb6 Nb6+=) 20.Ra8+= Ra8 21.Qb5 Qb5 (21...Rb8 22.Qb6 Rb6 23.Bc3=) 22.Nb5 Ra2 (22...Rb8 23.d4+=) 23.Rb1 (23.Bf6 Nf6 24.Nd6 Re2+=) 23...Be5+= 24.d4 Bb8 25.Bd3 (25.Nc3 Ra5+=) 25...Ne4 26.Be4 (26.Nc3 Nc3 27.Bc3 Ra3+=) 26...fe4= 27.Nc3 Ra6 (27...Ra5!?=) 28.Nd5+/– Nb6? (better is 28...f5+/–) 29.Nf6+– Kg7 (29...Kf8 30.Bc3 Ba7 31.Ne4+–) 30.Ne4 1–0. Sapareva,Magdalena – Georgiev,Nikolay, 154th MGU Open, 2015.

5.h3 h5 6.c4 e6 7.a3 (7.c5=) 7...b6 (7...a5!? 8.c5 ab4 9.ab4 Ra1 10.Ba1 b6=) 8.cd5 (8.Nd4 Bg6+=) 8...ed5 (8...Nd5 9.Bb5+=) 9.Bb5 (9.Nd4 Bg6+=) 9...Bd6 (9...c5 10.Bc6 Rc8 11.b5+=) 10.Nc3 (better is 10.Bc6+/–) 10...Rc8?? (better is 10...c5+=) 11.Nd4+– Ne4 12.Nf5 Qf6 13.Ne4 Qf5 14.Nd6 cd6 15.g4 hg4 16.Bg7 Rh3 17.Rg1 Ke7 18.Qg4 Qg4 19.Rg4 Rh1 20.Bf1 Rg8 21.f3 f6 22.Rc1 Rh7 23.Bf6! Nf6 24.Rg8 Ng8 25.Rc7 (25...Kf6 26.Rh7+–) 1–0. wlittle (2175) – masterofdreams (1800), net–chess.com, 2005.

5.Nh4!? Be6 6.Be2 =.

5.Nh4!? Bg4 6.f3 Be6=+.

5.a4 e6

6.b5 Bd6 7.a5 A) 7...0–0 A1) 8.Be2 c5 (8...h6 9.Nc3 Nc5 10.0–0 Re8 11.Nd4 Bg6 12.a6 ba6 13.Nc6 Qd7; 8...Nc5 9.Nc3 a6 10.0–0 c6 11.bc6 bc6 12.Nd4 Qb8 13.Rb1 Bh2; 8...a6 9.Nc3 Ne5 10.Ne5 Be5 11.ba6 ba6 12.f4 Bd6 13.0–0 h6; 8...Ne4 9.Nc3 Ndc5 10.Ne4 de4 11.Nd4 Qh4 12.Nf5 ef5 13.Bc4 Rfe8) 9.0–0 h6 10.Nc3 Qc7 11.a6 b6 12.d3 Rad8 13.h3 Ne5; A2) 8.Nd4 Bg6 (8...Nc5 9.Nf5 ef5 10.Qf3 g6 11.Nc3 Nce4 12.Ne4 Ne4 13.a6 b6; 8...h6 9.Nc3 Bg4 10.Be2 e5 11.Bg4 ed4 12.ed4 Ng4 13.Qg4 Re8; 8...Re8 9.a6 ba6 10.Nc3 Nc5 11.ba6 c6 12.Nc6 Qb6 13.Bb5 e5; 8...g6 9.Be2 c5 10.Nf5 ef5 11.a6 b6 12.0–0 Qe7 13.Re1 Rfe8) 9.a6 ba6 10.Nc6 Qe8 11.Ra6 e5 12.Ra7 Ra7 13.Na7 Qa8; A3) 8.Nc3 Nc5 (8...Qe7 9.Be2 a6 10.ba6 ba6 11.Nd4 Nc5 12.0–0 Qd7 13.Rb1 Rfb8; 8...e5 9.a6 ba6 10.Ra6 Nc5 11.Ra1 h6 12.Be2 Re8 13.d4 ed4; 8...a6 9.Be2 ab5 10.Nb5 Bb4 11.a6 ba6 12.Nbd4 a5 13.0–0 Ne4; 8...Re8 9.Be2 Nc5 10.Nd4 Qd7 11.Nf5 ef5 12.0–0 a6 13.d4 Nce4) 9.Be2 Qd7 10.0–0 h6 11.d4 Nce4 12.Ne4 Ne4 13.Ne5 Be5; B) 7...Nc5 B1) 8.Nc3 a6 (8...0–0 9.Be2 Re8 10.0–0 e5 11.d4 ed4 12.Nd4 Bd7 13.Ba3 Qe7; 8...Qd7 9.Be2 0–0 10.0–0 Ng4 11.h3 Nf6 12.d4 Nce4 13.Ne5 Qe8; 8...Bg6 9.Be2 0–0 10.0–0 h6 11.Na4 Ncd7 12.c4 Qe7 13.g3 c5; 8...h6 9.Be2 0–0 10.0–0 a6 11.Nd4 Bg6 12.ba6 ba6 13.f4 Qd7) 9.Be2 0–0 10.0–0 h6 11.Nd4 Bg6 12.ba6 ba6 13.f4 Qd7; B2) 8.Be2 0–0 (8...h6 9.0–0 0–0 10.Nc3 a6 11.Nd4 Bg6 12.ba6 ba6 13.f4 Qd7; 8...Qe7 9.Nc3 0–0 10.0–0 e5 11.d4 ed4 12.Nd4 Bd7 13.g3 a6; 8...h5 9.Nc3 0–0 10.h3 Qe7 11.0–0 e5 12.d4 ed4 13.ed4 Nce4; 8...a6 9.Nc3 0–0 10.0–0 h6 11.Nd4 Bg6 12.ba6 ba6 13.f4 Qd7; 8...Nfe4 9.d3 Nf6 10.Nc3 0–0 11.0–0 a6 12.Nh4 Qe7 13.ba6 ba6) 9.Nc3 Re8 10.0–0 h6 11.Nd4 a6 12.ba6 ba6 13.Rb1 c6; C) 7...e5= C1) 8.Nc3 c5 (8...Qe7 9.Be2 0–0 10.a6 ba6 11.Ra6 Nc5 12.Ra1 Nce4 13.0–0 h6; 8...0–0 9.Be2 c5 10.a6 b6 11.0–0 e4 12.Nh4 Be6 13.f4 d4; 8...h6 9.Be2 0–0 10.0–0 a6 11.h3 c5 12.bc6 bc6 13.Qc1 Qc7) 9.a6 b6 10.h3 d4 11.Na4 e4 12.Nh4 Be6 13.g4 Ne5; C2) 8.c4 0–0 (8...dc4 9.Bc4 e4 10.Nd4 Ne5 11.Qb3 Bd7 12.Ba3 0–0 13.0–0 c5) 9.Nc3 dc4 10.Bc4 e4 11.Qc2 ef3 12.Qf5 Ne5 13.Bf1 g6; C3) 8.a6 ba6 9.Nc3 0–0 10.Ra6 Nc5 11.Ra1 Ne6 12.Nh4 Bg4 13.f3 Bh5; C4) 8.Be2 0–0 9.0–0 Qe7 10.Nc3 a6 11.Re1 h6 12.Nh4 Be6 13.Nf3 Rfb8.

6.b5 Bd6 7.Nc3 A) 7...e5 A1) 8.a5 h6 (8...0–0 9.a6 ba6 10.Ra6 Nc5 11.Ra1 Qb8 12.Be2 a6 13.Ne5 Be5; 8...Qe7 9.Be2 0–0 10.a6 ba6 11.Ra6 Nc5 12.Ra1 Nce4 13.0–0 Nc3) 9.Be2 0–0 10.a6 ba6 11.Ra6 Nc5 12.Ra2 Re8 13.d4 ed4; A2) 8.h3 0–0 (8...Qe7 9.Be2 0–0 10.Nh4 Be6 11.Nf3 c5 12.bc6 bc6 13.0–0 Rab8; 8...h6 9.Bd3 Bd3 10.cd3 Nc5 11.Qb1 e4 12.de4 de4 13.Nd4 Nd3) 9.Be2 c5 10.g4 Be6 11.Ng5 h6 12.Ne6 fe6 13.0–0 d4; A3) 8.Be2 0–0 (8...h6 9.a5 0–0 10.a6 ba6 11.Ra6 Nc5 12.Ra2 Qd7 13.0–0 d4; 8...c5 9.bc6 bc6 10.Bd3 Be6 11.Ng5 0–0 12.Rb1 e4 13.Ne6 fe6) 9.0–0 c5 10.bc6 bc6 11.Rb1 Rb8 12.g3 Rb4 13.Re1 Qc7; A4) 8.Bd3 Bd3 9.cd3 Nc5 10.Qc2 e4 11.de4 de4 12.Nd4 Nd3 13.Ke2 Nb2; B) 7...Nc5 B1) 8.a5 h6 (8...Qe7 9.Be2 0–0 10.0–0 e5 11.d4 ed4 12.Nd4 Bd7 13.Nb3 Nb3; 8...0–0 9.Be2 Re8 10.0–0 e5 11.d4 ed4 12.Nd4 Bg6 13.g3 Qd7; 8...a6 9.Be2 0–0 10.0–0 h6 11.Nd4 Bg6 12.ba6 ba6 13.f4 Qd7) 9.Be2 0–0 10.0–0 Qd7 11.h3 Qe7 12.Nd4 a6 13.ba6 ba6; B2) 8.Nh4 Bg4 9.Be2 Be2 10.Qe2 0–0 11.0–0 e5 12.Nf5 d4 13.ed4 ed4; B3) 8.h3 Qe7 (8...0–0 9.Be2 h6 10.0–0 Qe7 11.Nh4 Bh7 12.d3 e5 13.Nf3 Bf5) 9.Be2 h6 10.0–0 0–0 11.Nh4 Bh7 12.Nf3 e5 13.d4 ed4; B4) 8.Be2 0–0 (8...h6 9.Nd4 Bg6 10.f4 0–0 11.0–0 e5 12.fe5 Be5 13.Nf3 Bd6; 8...a6 9.0–0 0–0 10.Nd4 ab5 11.ab5 Qd7 12.f4 Bg6 13.Qe1 e5; 8...Bg6 9.Nh4 a6 10.Ng6 hg6 11.g3 0–0 12.0–0 ab5 13.ab5 Qe7) 9.0–0 e5 10.Ne5 Be5 11.d4 Bh2 12.Kh2 Nce4 13.Kg1 Re8; C) 7...0–0 8.Be2 e5 (8...Nc5 9.0–0 h6 10.a5 a6 11.Nd4 Bg6 12.ba6 ba6 13.f4 Qd7; 8...c5 9.bc6 bc6 10.Nd4 Qc7 11.f4 Rab8 12.Rb1 Rb4 13.Ba1 a5; 8...h6 9.Nd4 Bg6 10.f4 Nc5 11.0–0 Qd7 12.Nf3 Bf5 13.a5 Rfe8) 9.0–0 c5 10.bc6 bc6 11.Rb1 Rb8 12.h3 Qc7 13.g4 Bg6.

6.b5 Bd6 7.c4 c6 (7...0–0 A) 8.Nc3 Nc5 (8...h6 9.Nd4 Bg6 10.cd5 Nd5 11.Nd5 ed5 12.Be2 Nc5 13.0–0 Qe7) 9.d4 Nce4 10.c5 Be7 11.Bd3 b6 12.cb6 ab6 13.0–0 Nc3; B) 8.a5+= Nc5 (8...Rb8 9.Nd4 Bg6 10.Nc3 Ne5 11.cd5 ed5 12.f4 Nd3 13.Bd3 Bd3) 9.d4 Nce4 10.c5 Be7 11.Nc3 b6 12.Ne4 Ne4 13.Ne5 bc5; 7...h6 A) 8.Nc3 0–0 (8...Nc5 9.Nd4 Nd3 10.Bd3 Bd3 11.cd5 Nd5 12.Qf3 Qg5 13.Ne4 Qg6) 9.Nd4 Bg4 10.f3 e5 11.fg4 ed4 12.ed4 Re8 13.Be2 Ng4; B) 8.cd5 Nd5 (8...ed5 9.Nd4 Bg6 10.Nc3 0–0 11.Be2 Nc5 12.0–0 Qd7 13.f4 Ne6) 9.Bg7 Rg8 10.Bd4 e5 11.Bb2 Nb4 12.d3 e4 13.Nd4 Bg4; C) 8.Nd4 Bh7 (8...Be5 9.Nf5 Bb2 10.Ng7 Kf8 11.Ra2 Kg7 12.Rb2 Nc5 13.cd5 ed5) 9.Nc3 dc4 10.Bc4 Ne5 11.Qe2 Nc4 12.Qc4 e5 13.Nf3 0–0; 7...Nc5 8.d4 (8.cd5 ed5 9.Bf6 Qf6 10.Nc3 Be6 11.Qc2 0–0 12.d4 Ne4 13.Ne4 de4) 8...Nce4 9.c5 Ng4 10.cd6 Ngf2 11.Qc2 cd6 12.Rg1 Rc8 13.Nc3 Nc3) 8.Nd4 (8.Nc3 0–0 (8...Nc5 9.d4 Nce4 10.c5 Bc7 11.Bd3 Nc3 12.Bc3 Ne4 13.Be4 de4) 9.Nd4 Bg6 10.bc6 bc6 11.cd5 ed5 12.h4 Qb6 13.Ba3 c5; 8.bc6 bc6 9.Nd4 0–0 10.cd5 cd5 11.Nc3 Nc5 12.Nf5 ef5 13.Rb1 Rb8) 8...Bb1 (8...0–0 9.Nc3 Re8 10.a5 Bg4 11.f3 c5 12.Nc6 bc6 13.fg4 cb5; 8...Bg6 9.bc6 bc6 10.cd5 cd5 11.Ba3 Ba3 12.Na3 0–0 13.Nc6 Qb6) 9.Qb1 (9.bc6 Be4 10.cd7 Nd7 11.Nb5 Be5 12.d4 Bb8 13.cd5 Bd5) 9...c5 10.Nb3 (10.Nf3 0–0 11.Bd3 Qc7 12.0–0 Ne5 13.Ne5 Be5) 10...Rc8 (10...0–0 11.Qc2 Qc7 12.Be2 Rae8 13.g3 Be5) 11.d3 (11.Be2 0–0 12.0–0 dc4 13.Bc4 Be5) 11...0–0 (11...Qc7 12.Be2 0–0 13.g3 dc4) 12.h3 (12.Be2 Qc7 13.h3 Rfd8) 12...Re8 (12...Ne5 13.Be2= Ng6; 12...Be5 13.Be2 Qc7) 13.Be2= e5 (13...Qc7=) 14.a5 d4 15.e4 Re6 16.a6 b6 17.Qc2 Ne8 18.0–0–0 (18.Bg4 Rf6+=) 18...Bf8 (18...Rg6 19.Rdg1=) 19.Kb1 Rc7 20.Bc1 g6 (20...Nd6 21.f4+=) 21.Bg4 Rd6 22.f4 Bg7 23.f5 h6 24.fg6 fg6 25.Rdf1 Rf6 26.Qe2 Qe7 27.Rf6 Nef6 28.Rf1 Rc8 29.Bd7 Nd7 30.Qg4 Rf8 31.Rf8 Bf8? 32.h4?? Kh7 33.h5 g5 34.Qf5 Kh8 35.Nd2 Nf6 36.Nf3 Nh5? 37.Ne5 Qf6 38.Qf6 Nf6 39.Nc6 (39.Nc6 Ne8 40.Na7+–) 1–0. De Visser,Arno – Bergman,E, 1990.

6.b5 Bd6 7.Be2 A) 7...0–0 A1) 8.0–0 e5 (8...Qe7 9.Nh4 Nc5 10.Nc3 h6 11.Nf5 ef5 12.f4 a6 13.Rf3 ab5; 8...h6 9.Nd4 Bg6 10.f4 a5 11.Nc3 e5 12.fe5 Ne5 13.Nf5 Re8; 8...Nc5 9.Nh4 Re8 10.Nc3 h6 11.Nf5 ef5 12.g3 Rc8 13.d4 Ne6; 8...a6 9.Nc3 ab5 10.Nb5 Qe7 11.a5 h6 12.Nh4 Be4 13.d3 Bf5; 8...Re8 9.Nh4 h6 10.Nf5 ef5 11.Nc3 Nc5 12.g3 Qd7 13.d4 Ne6) 9.c4 h6 10.Nc3 dc4 11.Bc4 Nb6 12.Be2 Qe7 13.a5 Nbd5; A2) 8.Nc3 c5 9.0–0 e5 10.d3 d4 11.Nb1 a6 12.ba6 Ra6 13.Nbd2 h6; A3) 8.Nh4 Re8 (8...h6 9.Nf5 ef5 10.0–0 Nc5 11.Nc3 Qd7 12.f4 Be7 13.Bf3 Ne6; 8...Nc5 9.Nc3 Re8 10.Nf5 ef5 11.0–0 Qd7 12.d4 Ne6 13.a5 Ng5; 8...a6 9.Nc3 Nc5 10.Nf5 ef5 11.Bf3 c6 12.0–0 Re8 13.g3 g6; 8...c6 9.Nf5 ef5 10.0–0 Nc5 11.Nc3 Qa5 12.f3 a6 13.Qe1 ab5; 8...Qe7 9.Nc3 Bb4 10.0–0 Rfe8 11.a5 Nc5 12.f3 Bc3 13.Bc3 Nfd7) 9.0–0 Nc5 10.Nc3 h6 11.Nf5 ef5 12.g3 Qd7 13.d4 Ne6; B) 7...Nc5 B1) 8.0–0 0–0 (8...h6 9.Nd4 Bg6 10.f4 Qd7 11.Nf3 Qe7 12.Ne5 Bf5 13.Bd4 0–0; 8...a6 9.Nc3 0–0 10.Nd4 ab5 11.ab5 Qd7 12.f4 Bg6 13.Qe1 e5) 9.Nh4 h6 10.Nf5 ef5 11.Nc3 Qd7 12.f4 Rfe8 13.Bf3 Be7; B2) 8.Nc3 h6 (8...0–0 9.Nh4 a6 10.Nf5 ef5 11.Bf3 c6 12.0–0 Re8 13.g3 Ne6) 9.Nd4 Bg6 10.f4 0–0 11.0–0 e5 12.fe5 Be5 13.Nf3 Bd6; B3) 8.Nd4 Bg6 (8...0–0 9.Nf5 ef5 10.0–0 Re8 11.Nc3 Qd7 12.Bf3 c6 13.g3 a6; 8...a6 9.Nc3 0–0 10.0–0 ab5 11.ab5 Qd7 12.f4 Bg6 13.Qe1 e5; 8...Qe7 9.Nf5 ef5 10.Nc3 0–0 11.0–0 h6 12.f4 Rfe8 13.Qe1 Qd7) 9.f4 0–0 10.Nc3 e5 11.fe5 Be5 12.Nf3 Bd6 13.0–0 c6; B4) 8.Nh4 h6 (8...0–0 9.0–0 h6 10.Nf5 ef5 11.Nc3 Qd7 12.f4 Rfe8 13.Bf3 Be7; 8...c6 9.0–0 0–0 10.Nc3 Qe7 11.f3 Qc7 12.f4 Rfe8 13.Nf5 ef5; 8...Qe7 9.Nc3 0–0 10.Nf5 ef5 11.0–0 c6 12.f4 a6 13.Bf3 h6; 8...Be4 9.d3 Bg6 10.Nc3 c6 11.f4 0–0 12.0–0 Qc7 13.Rb1 Rab8) 9.Nf5 ef5 10.c4 0–0 11.Nc3 Nce4 12.cd5 Bb4 13.0–0 Qd6; C) 7...c5 8.Nh4 Bg6 (8...Qc7 9.f4 0–0 10.0–0 Rfe8 11.a5 h6 12.Nf5 ef5 13.Bf3 Rad8; 8...0–0 9.0–0 Be5 10.Be5 Ne5 11.Nf5 ef5 12.d4 cd4 13.Qd4 Re8; 8...h6 9.Nf5 ef5 10.0–0 0–0 11.f4 Re8 12.Bd3 g6 13.a5 c4; 8...c4 9.Nf5 ef5 10.Nc3 0–0 11.0–0 Re8 12.Bf3 Nc5 13.d3 cd3; 8...Be4 9.d3 Bg6 10.0–0 0–0 11.g3 Qc7 12.Ng6 hg6 13.Nc3 g5) 9.0–0 Ne4 10.g3 Be5 11.Be5 Ne5 12.d3 Nd6 13.f4 Nd7; D) 7...h6 D1) 8.Nc3 Nc5 (8...0–0 9.Nd4 Bg6 10.f4 e5 11.fe5 Ne5 12.0–0 c5 13.bc6 bc6; 8...e5 9.0–0 0–0 10.a5 a6 11.h3 c6 12.bc6 bc6 13.Ba3 Ba3; 8...Bg6 9.0–0 0–0 10.Nh4 Bh7 11.f4 c5 12.bc6 bc6 13.Rb1 Rb8; 8...Qe7 9.Nd4 Bg6 10.f4 e5 11.fe5 Qe5 12.Nf3 Qh5 13.0–0 0–0) 9.Nd4 Bg6 10.f4 0–0 11.0–0 Qd7 12.Nf3 Bf5 13.d3 Rfe8; D2) 8.Nh4 Bh7 9.Nc3 0–0 10.0–0 c5 11.bc6 bc6 12.Rb1 Rb8 13.Nf3 Qc7; D3) 8.Nd4 Bg6 9.f4 e5 10.fe5 Ne5 11.Nc3 0–0 12.0–0 c5 13.bc6 bc6; D4) 8.0–0 c5 9.bc6 bc6 10.Nd4 Qc7 11.Nc3 Rb8 12.Rb1 0–0 13.f4 Rb4; E) 7...a5 E1) 8.ba6 ba6 9.Nc3 0–0 10.Nd4 Nc5 11.Rb1 Qd7 12.0–0 Bg6 13.f4 Rfb8; E2) 8.0–0 e5 (8...0–0 9.Nh4 Qe7 10.Nc3 h6 11.Nf5 ef5 12.f4 Bc5 13.Bd3 Qe6; 8...h6 9.Nc3 0–0 10.Nd4 Bg6 11.f4 e5 12.fe5 Ne5 13.Nf5 Re8; 8...Nc5 9.Nc3 h6 10.Nd4 Bg6 11.f4 0–0 12.f5 Bh7 13.fe6 Ne6) 9.c4 0–0 10.cd5 Nd5 11.d3 Nb4 12.e4 Bg4 13.Nbd2 Nc5; E3) 8.Nh4 0–0 (8...h6 9.Nf5 ef5 10.0–0 0–0 11.Nc3 Qe7 12.f4 Bc5 13.Bd3 Qe6; 8...Nc5 9.0–0 0–0 10.Nc3 Qe7 11.Nf5 ef5 12.f4 Nce4 13.Ne4 Ne4; 8...Be4 9.d3 Bg6 10.0–0 Qe7 11.g3 0–0 12.Nc3 Bb4 13.Ng6 hg6; 8...Qe7 9.Nf5 ef5 10.Nc3 0–0 11.0–0 Bb4 12.Bf3 Qd6 13.Ne2 Ne5; 8...g6 9.Nc3 0–0 10.0–0 Qe7 11.f3 Bc5 12.g4 g5 13.gf5 gh4) 9.Nc3 h6 10.Nf5 ef5 11.0–0 Qe7 12.d4 Qe6 13.h3 Nb6; F) 7...Qe7 F1) 8.0–0 e5 (8...0–0 9.Nh4 a6 10.ba6 ba6 11.Nc3 Rab8 12.Nf5 ef5 13.Rb1 Rb4) 9.Nc3 0–0 10.h3 h6 11.Nh4 Be6 12.Nf3 c5 13.bc6 bc6; F2) 8.Nh4 a6 (8...0–0 9.0–0 a6 10.ba6 ba6 11.Nc3 Rab8 12.Rb1 Rb4 13.Nf5 ef5; 8...Nc5 9.Nc3 0–0 10.0–0 h6 11.Nf5 ef5 12.f4 Rfe8 13.Bf3 c6; 8...g6 9.0–0 0–0 10.Nc3 a6 11.f3 a5 12.g4 g5 13.gf5 gh4; 8...h6 9.Nf5 ef5 10.Nc3 0–0 11.0–0 Rfe8 12.g3 Bb4 13.Bf3 Bc3; 8...Be4 9.d3 Bf5 10.0–0 0–0 11.Nc3 h6 12.Nf5 ef5 13.d4 Qe6) 9.Nf5 ef5 10.Nc3 0–0 11.0–0 ab5 12.ab5 Nb6 13.Bd3 Ra1; G) 7...e5 G1) 8.a5 a6 (8...0–0 9.Nc3 a6 10.0–0 Qe7 11.Nh4 Be6 12.Nf3 h6 13.h3 c5; 8...c5 9.0–0 0–0 10.a6 b6 11.d3 Qc7 12.Nc3 e4 13.Nh4 Be6; 8...Qe7 9.Nc3 a6 10.Nh4 Be6 11.Nf3 0–0 12.0–0 h6 13.h3 c5; 8...h6 9.Nc3 0–0 10.a6 b6 11.0–0 Qe7 12.Nh4 Bh7 13.Nf3 Rac8) 9.Nc3 0–0 10.0–0 h6 11.h3 Rb8 12.Ra2 Be6 13.Qa1 Ra8; G2) 8.0–0 Qe7 (8...c5 9.c4 d4 10.Nh4 Be6 11.Qc2 0–0 12.Nf5 Bf5 13.Qf5 Qe7; 8...0–0 9.a5 Qe7 10.Nc3 Nc5 11.d4 ed4 12.Nd4 Qe5 13.Nf3 Qe6; 8...h6 9.c4 0–0 10.Nc3 dc4 11.Bc4 Nb6 12.Be2 Qe8 13.a5 Nbd5) 9.c4 dc4 10.Bc4 Nb6 11.Be2 0–0 12.Nc3 Rad8 13.a5 Nbd5.

6.b5 a5

7.ba6 ba6 8.Nc3 Nc5 (8...Be7 9.Nd4 Nc5 10.Nf5 ef5 11.d4 Nce4 12.Ne4 Ne4 13.f3 Nd6; 8...Bc5 9.Rb1 0–0 10.Be2 Qe7 11.0–0 Rfb8 12.Nh4 Rb4 13.Nf5 ef5; 8...Bd6 9.Nd4 Qc8 10.Nf5 ef5 11.Rb1 0–0 12.Be2 Nc5 13.0–0 Qd7; 8...Qc8 9.Bd3 Rb8 10.Rb1 Bd6 11.Bf5 ef5 12.0–0 0–0 13.Qe2 c6; 8...Bg6 9.Be2 Bd6 10.Rb1 0–0 11.0–0 h6 12.g3 Qe7 13.Nd4 Bc5) 9.Nd4 Bg6 10.Rb1 Bd6 11.h4 e5 12.Nf3 0–0 13.h5 Nh5.

7.Nc3 A) 7...Be7 8.Bd3 0–0 (8...Nc5 9.Bf5 ef5 10.0–0 0–0 11.Qe2 Re8 12.Nd4 Qd7 13.Ba3 Bd6; 8...Bg6 9.0–0 0–0 10.Bg6 hg6 11.d3 Nc5 12.Ba3 Ncd7 13.Bb2 Bb4) 9.0–0 g6 10.Qe2 Nc5 11.Bf5 ef5 12.Nd4 Qd7 13.Ba3 Rfe8; B) 7...Bd6 B1) 8.Bd3 Bg6 (8...0–0 9.0–0 g6 10.Re1 Nc5 11.Bf5 ef5 12.Nd4 Re8 13.f4 Ne6; 8...Nc5 9.Bf5 ef5 10.0–0 0–0 11.Nd4 Qd7 12.Ba3 Rfe8 13.Qe2 g6; 8...Bg4 9.0–0 0–0 10.Be2 Nc5 11.h3 Bh5 12.d3 Qe7 13.Nh4 Be2; 8...Bd3 9.cd3 e5 10.0–0 0–0 11.Qb3 Nc5 12.Qc2 e4 13.de4 de4) 9.0–0 Nc5 10.Bg6 hg6 11.h3 Qe7 12.Ng5 0–0 13.Re1 Ncd7; B2) 8.Nd4 Bg6 9.f4 0–0 10.Be2 e5 11.fe5 Ne5 12.0–0 Re8 13.Nf5 Bb4; C) 7...Nc5 C1) 8.g3 Bd6 (8...h6 9.Nd4 Bg6 10.Bh3 Bh5 11.f3 e5 12.Nf5 g6 13.Nh4 Be7) 9.Nd4 Bg6 10.Bg2 0–0 11.0–0 h6 12.Nde2 Qe7 13.d4 Nce4; C2) 8.Be2 Bd6 (8...Be7 9.Nd4 0–0 10.0–0 Qd6 11.f4 Rfe8 12.Bf3 h6 13.Qe2 Bg6) 9.Nh4 0–0 10.0–0 Qe7 11.Nf5 ef5 12.f4 g6 13.Bf3 Nce4; D) 7...h6 D1) 8.Nd4 Bg6 (8...Bh7 9.f4 Bc5 10.Be2 Qe7 11.Nb3 Bd6 12.0–0 0–0 13.Nd4 Nc5) 9.Bd3 Bd3 10.cd3 e5 11.Nb3 Bd6 12.0–0 0–0 13.d4 Qe8; D2) 8.Be2 Bd6 (8...Bb4 9.0–0 0–0 10.Nd4 Bg6 11.f4 e5 12.fe5 Ne5 13.Qb1 c5; 8...Bc5 9.Nd4 Bh7 10.f4 0–0 11.0–0 Qe7 12.Nb3 Bd6 13.Nd4 Nc5; 8...Bh7 9.Bd3 Bd3 10.cd3 Bd6 11.0–0 0–0 12.d4 Qe7 13.Qc2 Rfe8) 9.0–0 0–0 10.Nd4 Bg6 11.f4 Nc5 12.f5 Bh7 13.fe6 Ne6; D3) 8.Bd3 Bd3 (8...Bc5 9.Bf5 ef5 10.Ne2 0–0 11.Ned4 Bd4 12.Nd4 g6 13.0–0 Nc5) 9.cd3 Bd6 10.0–0 0–0 11.d4 Qe7 12.Qc2 Rfe8 13.e4 de4; E) 7...Bg6 E1) 8.g3 Bd6 (8...Bb4 9.Bg2 0–0 10.0–0 Qe7 11.Ne2 e5 12.Nh4 Bh5 13.c3 Bd6; 8...h6 9.Bd3 Bd3 10.cd3 Bd6 11.0–0 0–0 12.d4 Re8 13.d3 e5) 9.Be2 h6 10.0–0 0–0 11.d3 Qe7 12.Qd2 Rfe8 13.Nh4 Bh7; E2) 8.Bd3 Bb4 (8...Bd6 9.0–0 Nc5 10.Bg6 hg6 11.h3 Qe7 12.Ng5 0–0 13.Re1 Ncd7; 8...Nc5 9.Bg6 hg6 10.h3 Bd6 11.0–0 c6 12.Ba3 Nce4 13.bc6 bc6) 9.0–0 0–0 10.Bg6 fg6 11.d3 Qe7 12.Qe2 Qd6 13.h3 e5; E3) 8.Nh4 Bh5 (8...Bb4 9.Be2 Ne4 10.g3 Bc3 11.dc3 Qf6 12.f3 Nd6 13.0–0 Nb6) 9.Be2 Be2 10.Qe2 Ne5 11.0–0 Nc4 12.Ra2 Bb4 13.Nf3 Nb2; E4) 8.d3 Bd6 (8...h6 9.g3 Bd6 10.Bg2 Qe7 11.0–0 0–0 12.Re1 Bb4 13.Qd2 Qd6) 9.Be2 h6 10.0–0 0–0 11.Nh4 Bh7 12.f4 Re8 13.Nf3 e5; E5) 8.h3 Bd6 (8...Bb4 9.Be2 0–0 10.0–0 h6 11.d3 Qe7 12.d4 Bf5 13.Qb1 Rfe8; 8...Nc5 9.Be2 Bd6 10.Nh4 0–0 11.0–0 Qd7 12.Ng6 hg6 13.Bf3 c6) 9.Bd3 0–0 10.Bg6 hg6 11.0–0 Qe7 12.d3 Rfd8 13.Qd2 Bb4; E6) 8.Be2 Bb4 9.0–0 0–0 10.Nh4 Nc5 11.Nb1 Nce4 12.d3 Nd6 13.Nd2 Nf5; F) 7...Bb4 8.Bd3 Ne4 (8...0–0 9.0–0 Ne4 10.Nd4 Bc3 11.Bc3 Nc3 12.dc3 Bg6 13.c4 Nc5; 8...Bd3 9.cd3 Qe7 10.0–0 0–0 11.d4 h6 12.Qc2 Rfc8 13.Rfc1 c6; 8...Bg6 9.0–0 0–0 10.Bg6 fg6 11.d3 Qe7 12.Qe2 Qd6 13.h3 e5; 8...Nc5 9.Bf5 ef5 10.Ne2 0–0 11.0–0 Ne6 12.h3 Re8 13.Ned4 Nd4; 8...g6 9.Bf5 gf5 10.0–0 Rg8 11.Ne2 Qe7 12.Ned4 0–0–0 13.d3 Kb8) 9.0–0 0–0 10.Nd4 Bc3 11.Bc3 Nc3 12.dc3 Bg6 13.c4 Nc5.

7.c4 dc4 (7...Nc5 8.Ne5+= (8.Be2 dc4 9.Bc4 Bd3 10.Na3 Bc4 11.Nc4 Nd3 12.Ke2 Ng4 13.Qb3 Ndf2; 8.Ba3 Bd6 9.Nc3 0–0 10.Nd4 Bg6 11.cd5 Nd5 12.Nd5 ed5 13.Be2 Qh4; 8.Nc3 dc4 9.Ne5 Nfd7 10.Nd7 Qd7 11.Bc4 Bd3 12.Ba2 Be7 13.Ba3 0–0; 8.h3 Nd3 9.Bd3 Bd3 10.cd5 Nd5 11.Na3 Nb4 12.Qb3 Be7 13.Bd4 0–0) 8...Bd6 (8...Nfd7 9.Nd7 Qd7 10.Na3 Nd3 11.Bd3 Bd3 12.c5 Bc5 13.Qb3 Bf5) 9.d4 Nce4 10.f3 Bb4 11.Ke2 Ng4 12.Ng4 Qh4 13.g3 Qg4) 8.Na3 (8.Bc4 Bd6= (8...h6 9.Nc3 Bb4 10.0–0 0–0 11.h3 Re8 12.Rc1 Nb6 13.Be2 Bd3; 8...Nb6 9.Be2 Bc5 10.Nc3 0–0 11.0–0 Qd6 12.d3 e5 13.Ng5 Qe7; 8...Bb4 9.0–0 0–0 10.Nc3 h6 11.h3 Nb6 12.Be2 Qd6 13.d3 Bg6; 8...Bc5 9.Nc3 Nb6 10.Be2 0–0 11.0–0 h6 12.Qb3 Qe7 13.Nh4 Bh7) 9.Nc3 0–0 10.0–0 Nc5 11.d4 Nce4 12.Ne5 Nc3 13.Bc3 Ne4) 8...Bd3 (8...Ba3 9.Ra3 Nb6 10.Qc1+= Qd5 11.Ne5 0–0 12.f3 Rfd8 13.e4 Be4; 8...c3 9.dc3 Ne4 10.Nc4 Qf6 11.Qd4 Bc5 12.Qf6 Ndf6 13.Nd4 0–0; 8...Nc5 9.Nc4 Be7 10.Be2 Nd3 11.Bd3 Bd3 12.Nce5 0–0 13.Rc1 Bf5; 8...Be7 9.Nc4 0–0 10.Be2 Nc5 11.0–0 Nd5 12.h3 Nd3 13.Bd4 h6) 9.Nc4= Bf1 (9...Nc5 10.Nfe5 Bf1 11.Rf1 Bd6 12.Bd4 0–0 13.Qc2 Nd5) 10.Kf1 Be7 (10...Nc5 11.Bd4 Be7 12.Qc2 Qd5 13.Be5 Nfe4) 11.Qc2 (11.h4 Nb6 12.Nce5 Nfd5 13.e4 Nb4) 11...Nc5 (11...0–0 12.Kg1= (12.h4 Nc5 13.Ba3 Nce4) 12...Nd5 13.Bd4 N7b6) 12.Ke2 (12.Bf6 Bf6 13.d4 0–0+=; 12.d4 Nce4 13.Nfe5 Nd6) 12...Qd5 (12...Ncd7 13.Rhc1= (13.Bc3 Bb4) 13...0–0; 12...Nd5 13.Ba3 Nd7) 13.Rhd1 (13.Be5 Bd8) 13...Rd8 (13...0–0 14.Bf6 Bf6 15.d4=) 14.d4 (14.Bf6 Bf6 15.d4 Ne4 16.Na5 Ra8+/–) 14...Nce4 15.Nfe5 Bb4? (better is 15...Nd6!? 16.Nd6 Bd6+/–) 16.f3+– Nd6 17.e4 Nfe4? (17...Nde4 A) 18.fe4?! Qe4 (18...Ne4?? 19.Ne3 Ng3 20.hg3+–) 19.Qe4 Ne4+/–; B) 18.Ne3 Ng3 19.hg3+–) 18.fe4 (18.Ne3 Nf6+–) 18...Ne4?? (better is 18...Qe4 19.Qe4 Ne4+–) 19.Ne3 Qd6 20.Qe4 f6 21.Nf3 0–0 22.d5 e5 23.Nf5 Qd7 24.g4 Qf7 25.Ba3 h5 26.Bb4 ab4 27.Qb4 e4 28.Ne7 Kh8 29.Nh4 Rfe8 30.Nhg6 Kh7 31.gh5 f5 32.Rf1 Rd5 33.Nd5 Qd5 34.Rad1 Qf7 35.Qd4 e3 36.Rb1 Qa2 37.Rb2 (37.Rb2 Qe6 38.Rc2+–) 1–0. De Visser,Arno – de Graaf, 1985.

7.Bd3 A) 7...Bg6 A1) 8.Nc3 Bb4 (8...Bd6 9.0–0 Nc5 10.Bg6 fg6 11.Ba3 0–0 12.d3 Qe7 13.h3 Ncd7; 8...Nc5 9.Bg6 hg6 10.h3 Be7 11.0–0 0–0 12.Qe2 Re8 13.d3 Bf8) 9.0–0 0–0 10.Bg6 hg6 11.Qe2 e5 12.h3 Re8 13.Ng5 Nc5; A2) 8.0–0 Bb4 (8...Nc5 9.Bg6 hg6 10.h3 Bd6 11.Nc3 Qe7 12.d3 0–0 13.Ba3 Rfe8; 8...Bd6 9.Nc3 Nc5 10.Bg6 hg6 11.h3 Qe7 12.Ng5 0–0 13.d4 Ncd7) 9.h3 0–0 10.Bg6 hg6 11.Qe2 Qe7 12.d3 e5 13.Nbd2 Rfe8; A3) 8.Bg6 hg6 9.Nc3 Bd6 10.h3 Ne5 11.0–0 Nc4 12.Qc1 0–0 13.d3 Nb2; B) 7...g6 B1) 8.Bf5 gf5 (8...ef5 9.Nc3 Nb6 10.0–0 Bd6 11.d3 0–0 12.h3 Qe7 13.Ne2 Nfd7) 9.Nc3 Bd6 10.0–0 Rg8 11.Ne2 c6 12.bc6 bc6 13.Ned4 Qc7; B2) 8.0–0 Bd6 (8...Bb4 9.Nc3 0–0 10.Bf5 ef5 11.Ne2 Bd6 12.h3 c6 13.bc6 bc6; 8...Bc5 9.Nc3 0–0 10.Qe2 Bb4 11.Nd4 Bd3 12.cd3 e5 13.Nb3 Qe7; 8...Nc5 9.Bf5 gf5 10.d4 Ncd7 11.Nbd2 Rg8 12.c4 Bb4 13.Qc2 Ne4; 8...Be7 9.Bf5 ef5 10.Bd4 0–0 11.Nc3 Bc5 12.Qe2 Qe7 13.h3 Qd6; 8...Bd3 9.cd3 Bb4 10.Qc2 0–0 11.h3 Rc8 12.Nc3 e5 13.d4 e4) 9.Bf5 ef5 10.c4 0–0 11.cd5 Nd5 12.Nc3 N5f6 13.d4 Ne4; B3) 8.Nc3 Bd3 (8...Nc5 9.Bf5 gf5 10.0–0 Bd6 11.d3 Rg8 12.Qd2 h5 13.Ne2 h4; 8...Bd6 9.Bf5 gf5 10.0–0 Rg8 11.d3 Qe7 12.Qd2 Bb4 13.Nd4 0–0–0; 8...Bb4 9.Bf5 gf5 10.0–0 Rg8 11.Ne2 Qe7 12.Ned4 0–0–0 13.d3 Kb8; 8...Bc5 9.Bf5 gf5 10.0–0 Rg8 11.Ne2 Bd6 12.g3 Ng4 13.Nf4 Nc5) 9.cd3 Bd6 10.0–0 0–0 11.d4 e5 12.de5 Ne5 13.Ne5 Be5; C) 7...Bb4 C1) 8.0–0 0–0 (8...g6 9.Nc3 0–0 10.Bf5 ef5 11.Ne2 Re8 12.Nf4 Bd6 13.Re1 c6; 8...Bg6 9.h3 0–0 10.Bg6 hg6 11.d3 c6 12.Nc3 Qc7 13.Rb1 e5; 8...Qe7 9.Nc3 0–0 10.Bf5 ef5 11.Ne2 Bd6 12.d3 Nc5 13.Nf4 c6; 8...Bd3 9.cd3 0–0 10.Qc2 g6 11.Nc3 e5 12.d4 e4 13.Ne5 Re8) 9.Nc3 Bg6 10.Bg6 fg6 11.d3 Qe7 12.h3 e5 13.Qe2 Qd6; C2) 8.Nc3 Bg6 (8...Qe7 9.Bf5 ef5 10.0–0 0–0 11.Ne2 g6 12.Nf4 Bd6 13.Re1 Rfe8; 8...0–0 9.Bf5 ef5 10.0–0 Re8 11.d3 Bd6 12.h3 c6 13.Ba3 Bb4; 8...Bd3 9.cd3 0–0 10.0–0 Qe7 11.h3 e5 12.Qc2 Rfd8 13.Ne2 e4; 8...Ne4 9.0–0 0–0 10.Nd4 Bc3 11.Bc3 Nc3 12.dc3 Bg6 13.c4 Nc5) 9.Bg6 hg6 10.0–0 0–0 11.d3 Qe7 12.Qe2 Rfe8 13.e4 Qc5; C3) 8.Bf5 ef5 9.0–0 0–0 10.Nc3 g6 11.Ne2 Bd6 12.d3 c6 13.bc6 bc6; D) 7...Bd3 8.cd3 h6 (8...Bd6 9.Nc3 0–0 10.0–0 e5 11.Qc2 Qe7 12.h3 g6 13.e4 d4) 9.0–0 Bd6 10.Nc3 0–0 11.d4 Qe7 12.Qc2 Rfe8 13.e4 de4.

7.Be2 A) 7...Bb4 A1) 8.0–0 0–0 (8...h6 9.Nd4 0–0 10.Nf5 ef5 11.c4 dc4 12.Qc2 Ne4 13.Bc4 Re8; 8...Qe7 9.Nc3 0–0 10.Nd4 h6 11.Nf5 ef5 12.Bd3 g6 13.Ne2 Ne4) 9.Nh4 Qe7 10.Nc3 h6 11.Nf5 ef5 12.Bd3 g6 13.Qf3 Ne5; A2) 8.h3 h6 (8...0–0 9.0–0 Qe7 10.Nc3 e5 11.Nh4 Be6 12.Nf3 h6 13.Na2 Bd6; 8...Qe7 9.0–0 0–0 10.Nh4 h6 11.Nf5 ef5 12.Nc3 Qd6 13.Bd3 g6) 9.0–0 0–0 10.Nc3 Nc5 11.Na2 Ncd7 12.Nb4 ab4 13.a5 c5; A3) 8.Nc3 0–0 (8...e5 9.Bd3 Bd3 10.cd3 Qe7 11.0–0 0–0 12.Qc2 Qd6 13.Ne2 h6) 9.0–0 Nc5 10.Na2 Ncd7 11.Nb4 ab4 12.a5 c5 13.bc6 bc6; A4) 8.Nd4 Bg6 (8...0–0 9.Nc3 Bg6 10.0–0 e5 11.Nf3 Bf5 12.Nh4 Be6 13.Nf3 h6; 8...Be4 9.0–0 e5 10.Nb3 0–0 11.Nc3 Bf5 12.f4 ef4 13.Rf4 Bg6; 8...Qe7 9.0–0 0–0 10.f4 h6 11.Nc3 Bc5 12.Nf5 ef5 13.Bd3 Qe6) 9.0–0 0–0 10.f4 Re8 11.Nc3 e5 12.fe5 Ne5 13.Rf4 Qd6; A5) 8.Nh4 Be4 (8...Qe7 9.Nc3 0–0 10.0–0 Qd6 11.h3 h6 12.Na2 Ba3 13.Ba3 Qa3; 8...0–0 9.0–0 Qe7 10.Nc3 Qd6 11.Nb1 Ne5 12.c3 Neg4 13.g3 Bc5) 9.Nc3 h6 10.0–0 0–0 11.f4 Qe7 12.d3 Bh7 13.Qd2 Qc5; B) 7...h6 B1) 8.Nc3 Bb4 (8...Bc5 9.0–0 0–0 10.Bd3 Be4 11.Ne1 Bd6 12.Be4 Ne4 13.Ne4 de4; 8...Bh7 9.0–0 Bd6 10.Bd3 0–0 11.Bh7 Kh7 12.d4 Kg8 13.Qe2 Bb4) 9.Nd4 0–0 10.0–0 Bg6 11.f4 e5 12.fe5 Ne5 13.Qb1 Qd6; B2) 8.Nd4 Bg6 (8...Bh7 9.f4 Bc5 10.0–0 0–0 11.Nc3 Qe7 12.Nb3 Bd6 13.Nd4 Nc5; 8...Bd6 9.Nf5 ef5 10.Nc3 0–0 11.0–0 Re8 12.g3 Nc5 13.Bf3 c6; 8...Bb4 9.Nf5 ef5 10.0–0 0–0 11.c4 Nb6 12.cd5 Nbd5 13.Nc3 Bc3) 9.0–0 Bc5 10.f4 0–0 11.Nc3 Qe7 12.Nb3 Bd6 13.Bd3 Bd3; B3) 8.c4 Bc5 (8...Bb4 9.0–0 0–0 10.cd5 Nd5 11.d3 Bg4 12.Qc2 Nc5 13.Nbd2 Bd2; 8...Bd6 9.cd5 Nd5 10.Nc3 0–0 11.Nd5 ed5 12.Qb3 Be4 13.0–0 Nc5; 8...Nb6 9.cd5 Nbd5 10.0–0 Bc5 11.Nc3 0–0 12.Nd5 Nd5 13.d3 Bg4; 8...Be7 9.Nd4 Bg6 10.cd5 Nd5 11.Nc3 Nc5 12.0–0 0–0 13.Nd5 Qd5; 8...dc4 9.Na3 Ba3 10.Ba3 Nb6 11.0–0 Be4 12.h3 Qd5 13.Qc1 Bd3) 9.0–0 0–0 10.cd5 Nd5 11.Nc3 Nc3 12.Bc3 Bb4 13.Qc1 Nb6; B4) 8.0–0 Be7 (8...Bc5 9.Nc3 0–0 10.Bd3 Qe7 11.Bf5 ef5 12.Ne2 Bd6 13.Ned4 g6; 8...Bb4 9.Nd4 Bg6 10.f4 0–0 11.Nc3 e5 12.fe5 Ne5 13.Qb1 Qd6) 9.Nc3 0–0 10.Bd3 Be4 11.h3 Bc5 12.Qe2 Qe7 13.Nd4 Bd3; C) 7...Nc5 C1) 8.0–0 Bd6 9.Nh4 0–0 10.f4 h6 11.Nf5 ef5 12.Bf3 Be7 13.Be5 Nfd7; C2) 8.Nc3 Bd6 (8...h6 9.0–0 Bd6 10.d4 Nce4 11.Ne5 Nc3 12.Bc3 Ne4 13.Bb2 Qg5; 8...Be7 9.0–0 0–0 10.Nd4 Qd6 11.f4 Bg6 12.Qe1 Rfe8 13.f5 ef5) 9.0–0 0–0 10.Nh4 h6 11.Nf5 ef5 12.d4 Ne6 13.Qd3 g6; C3) 8.Nd4 Bg6 9.0–0 Bd6 10.f4 0–0 11.Nc3 h6 12.f5 Bh7 13.fe6 Ne6; C4) 8.Nh4 Bd6 9.Nf5 ef5 10.c4 0–0 11.Nc3 dc4 12.Bc4 Nfe4 13.d3 Nc3; D) 7...Bd6= D1) 8.Nc3 e5 9.0–0 0–0 10.Bd3 Bg4 11.Be2 Qe7 12.h3 Bf5 13.Nh4 Be6; D2) 8.Nd4 Bg6 (8...0–0 9.Nf5 ef5 10.0–0 Nc5 11.Nc3 Qd7 12.Bf3 c6 13.g3 Rfe8; 8...Nc5 9.Nf5 ef5 10.c4 0–0 11.Nc3 c6 12.0–0 Qe7 13.Qc2 g6; 8...h6 9.Nf5 ef5 10.Nc3 0–0 11.0–0 Re8 12.g3 Nc5 13.Bf3 c6; 8...Qe7 9.Nf5 ef5 10.0–0 0–0 11.Nc3 Bb4 12.d4 Rfe8 13.Qd3 f4) 9.f4 0–0 10.Nc3 e5 11.fe5 Ne5 12.0–0 Re8 13.d3 h6; D3) 8.Nh4 0–0 (8...Qe7 9.Nc3 0–0 10.0–0 h6 11.Nf5 ef5 12.Qe1 Bb4 13.f4 Nc5; 8...h6 9.Nf5 ef5 10.Nc3 0–0 11.0–0 Re8 12.g3 Nc5 13.Bf3 c6; 8...c6 9.Nc3 0–0 10.0–0 Qe7 11.d4 Be4 12.f3 Ng4 13.Qe1 Bh2) 9.0–0 h6 10.Nf5 ef5 11.Nc3 Re8 12.g3 Nc5 13.Bf3 c6; D4) 8.0–0 e5 9.c4 0–0 10.cd5 Nd5 11.d3 Nb4 12.e4 Be6 13.Nbd2 Nc5.

5.c4 dc4

6.Bc4 a6 7.Nc3 e5 8.Ng5 (8.Qb3 Bg6=) 8...Bg6+= (8...Bb4?? 9.Nf7 (9.Bf7?! Ke7 10.Qf3 g6+=) 9...Qe7 10.Nh8+–) 9.Qb3 Threatening mate... how? 9...Qe7 10.0–0 b5 11.Bd5 Rd8 (11...Nd5 12.Nd5 Qd6 13.a3–/+) 12.e4 (12.Bb7 Nb8 13.f4 c5 14.fe5 Ng4+=) 12...h6 (12...Nd5 13.Nd5 Qg5 14.Nc7 Ke7 15.Nd5 Kd6 16.Qc2=) 13.Nf3 Qb4 14.Bc6 Qd6 (14...Qb3 15.ab3 Bd6 16.Ra6=) 15.Ne5 Qe5 16.Nd5?? (16.Nb5 Qf4 17.g3+–) 16...Qd6–+ 17.e5? (better is 17.Bf6 gf6 18.Rac1–+) 17...Qc6 18.ef6 gf6?? (better is 18...Nf6 19.Nf6 gf6 20.Rfe1 Be7–+) 19.Rfe1+– Ne5 20.Nf6! Qf6 Decoy to f6 21.Be5 Qc6 (21...Qf5 22.Bh8 Kd7 23.Re5+–) 22.Bf6 (22.Bf6 Be7 23.Bh8+– (worse is 23.Be7 Rd3 24.Qb2 Rg8+–; 23.Re7 Kf8 24.Qa3 Kg8 25.Bh8 Kh8+–)) 1–0. Gross,Wilhelm – Merten,Rainer, xiv/19, 1987.

6.Bc4 e5 7.Ne5+= Ne5 8.Be5 Bb4? (8...Bd6 9.Bd4 c6 10.Nc3+/–) 9.0–0?? (better is 9.Qa4 Nd7 10.Qb4 Bb1 11.Bg7+– (11.Qb1?! Ne5 12.Qb5 Nd7+/–; 11.Rb1?! Ne5 12.Qb5 Nd7+–)) 9...0–0 10.Bc3 (10.Qf3 Bc8+=) 10...a5 11.Bb3 (11.Qf3!? Bc3 12.Nc3 Qd2 13.Rac1=) 11...Bd3+= 12.Re1 Qe7 13.Bc2 Qd6 (better is 13...Rfd8+=) 14.Bd3+/– Qd3 15.Bb4 (better is 15.Bf6 gf6 16.Qg4 Qg6 17.Qf3+/–) 15...ab4–/+ 16.Qe2 Rfd8 17.Qd3 Rd3 18.Rd1 Rad8 19.a3 ba3 20.Ra3+= b5 21.Rd3 Rd3 22.Rc1 Ne8 23.Rc2 b4 24.Rb2 b3 25.Kf1 c5 26.Nc3 c4 27.Ne4 f5 28.Nc5 Rd5 29.Na4 Nd6 30.Nb6 Ra5–+ 31.g3? Ra2 (31...Ra2 32.Rb1 Rd2 33.Nc4 Nc4 34.Rb3 Rc2–+) 0–1. Valpa – Adamant, playchess.de, 2005.

6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

6.Bc4 h6 7.d3 e6 8.a3 Qe7 (8...Nb6!?=) 9.0–0 0–0–0 10.Nd4 (10.Qb3 Nb6+=) 10...Bg4 (10...Bg6!?=) 11.f3 Bh3? (better is 11...Bf5+=) 12.gh3+– h5 (12...Nb6 13.Qe2+–) 13.f4 h4 (13...Nb6 14.Bb3+–) 14.Qa4 Kb8 15.Nf3 Nb6 16.Qc2 Nc4 17.Qc4 Nd5 18.Bd4 f6 19.Nc3 Nc3 20.Bc3 e5 (20...Qd7 21.Bd4+–) 21.fe5 fe5 (21...f5 22.b5+–) 22.Be5 g5 (22...Rh5 23.Qe4 Qd7+–) 23.Bh8 Qe3 24.Kg2 (better is 24.Kh1 Qf4+–) 24...Bd6 (24...Qd3 25.Rad1! Qd1 26.Rd1 Rd1 27.Bf6+–) 25.Bf6 Rf8 26.Rae1 Qf4 27.Qe6 a6 28.Bg5 Qf3 (28...Qf7 29.Nd4 Qe6 30.Rf8 Bf8 31.Ne6 Bd6+–) 29.Rf3 Rf3 30.Kf3 Bh2 31.Qa2 a5 32.Re8 Ka7 33.Qd5 b5 34.Qa8 Kb6 35.Rb8# 1–0. MT – guest1957, ICC, 2004.

6.Bc4 Nb6

7.Be2 Qd6 8.a3 Nbd7 A) 9.d4 e6 (9...a5 10.Nc3 e6 11.Nh4 Be4 12.f3 Bg6+=) 10.Nc3 Nd5 11.0–0 Be7 12.Nd2 N7f6=; B) 9.Nc3 e6 (9...a6 10.d4 Rd8 11.0–0 e6 12.Rc1 Be7+=; 9...c6 10.d4 e5 11.de5 Ne5 12.Ne5 Qe5+=) 10.Nb5 Qb6 11.Bd4 c5 12.Bf6 Nf6 +=.

7.Be2 Qd6 8.b5 0–0–0 9.Be5 (9.0–0 Kb8 10.Qb3 e6 11.Rc1 Qb4 12.Be5 Ne8+=) 9...Qd7 10.0–0 e6 11.a4 Bd6 12.a5 Nbd5 +=.

7.Be2 Qd6 8.b5 Qb4 9.Qc1 Rc8 10.a3 Qg4 11.Nd4 Qg5 12.Nf5 Qf5 13.Nc3 Nbd5 14.0–0 Nc3 15.Qc3 e6 16.Qe5 Qe5 17.Be5 Bd6 18.Bf6 gf6 19.Bf3 Rb8 20.d4 h5 21.a4 h4 22.a5 Ke7 23.a6 h3 24.g3 ba6 25.Ra6 Rb5 26.Ra7 Rb2 27.Rc1 f5 28.Rb7 Ra2 29.Rb5 Rd8 30.Rcb1 Kf6 31.Kf1 c5 32.dc5 Bc5 33.Rc5 Rdd2 34.Kg1 Rf2 35.Ra5 Rh2 36.Ra2 Ra2 37.Rb4 e5 38.Rh4 e4 39.Bh1 Re2 40.Rh3 Re3 41.Kg2 Re2 42.Kf1 Rd2 43.Rh8 Rd1 44.Kg2 Ke7 45.Kf2 Kf6 46.Bg2 ½–½. Machete99 (2240) – blik (2275), ICC, 2002.

7.Be2 Qd6 8.b5 Nfd7 9.0–0 (9.d4 Rd8 (9...0–0–0 10.0–0 Kb8 11.Nc3 e6 12.Rc1 Be7+=) 10.0–0 e6 11.Ba3 c5 12.bc6 Qc6+=) 9...Bb1 (9...e5!?= 10.Nc3 Bd3 11.Ne1 Be2 12.Qe2 Rd8=; 9...Bd3 10.a4 a6 11.Bd4 Be2 12.Qe2 e5=) 10.Qb1+= Na4 (10...e6 11.Rc1 Nd5 12.Qc2 Rd8+/–) 11.Bd4 Nac5 (11...Nab6 12.Rc1 e6+/–) 12.Rc1 f6 (12...e6+/–) 13.Nh4 g6 14.Bc5 Nc5 15.d4 Nd7 16.Bf3 Rb8 17.Qc2 Kd8 18.Qa4 e6 19.Be4 a6 20.ba6 Qa6 21.Qb3 f5 22.Bd3 Qd6 23.Nf3 Ke7 24.Qc3 c6 25.d5! ed5? 26.Qh8+– Nf6 27.Rab1 c5 28.Nh4 Bh6? 29.Ng6! (29.Ng6 Ke6 30.Rb6 Qb6 31.Qb8 hg6 32.Qc8 Kd6 33.Qh8+–) 1–0. Buss,Michael – Andersson,Lars H, corr ICCF TT/40–6, 1990.

7.Be2 e6

8.a3 a5 9.b5 Bd3 10.Bd4 Be2 11.Qe2 Nbd7 12.0–0 Bd6 13.d3 Qe7 14.a4 0–0 15.Nbd2 e5 16.Bb2 Nd5 17.Nc4 f6 18.Rfd1 Bb4 19.g3 (19.Qc2 Rad8+=) 19...Qf7 20.e4 N5b6 21.Nb6 Nb6 22.d4 Qc4 23.Qc4 Nc4 24.Ra2 Rad8 25.Ba1 ed4 26.Rd4 (worse is 26.Bd4 Ne5 27.Kg2 Rf7–/+) 26...Nb6 (26...Nd6 27.Rc2=) 27.Rd8 Rd8 28.Bd4 Nc8 29.Rc2 Rd7 30.Kg2 Ne7 31.h4 c6 32.Bb6 cb5 33.ab5 Rd6 34.Bc7 Re6 35.Rc4 Kf8 36.h5 Ke8 37.Bf4 Rb6 38.Nd4 g5?? (better is 38...Bd6+=) 39.Bc7+– (39.Bc7 Nc8 40.Bb6 Nb6 41.Rc7+–) 1–0. Zilberman,Yaacov (2505) – Kogan,Artur (2480), ISR–chT Ramat Aviv, 2000.

8.a3 Bd3 9.0–0 Nc4 (9...Be2 10.Qe2 Bd6 11.Qb5 c6 12.Qg5=) 10.Bd4 Be2 11.Qe2 Nb6 12.Nc3 c6 (12...Bd6 13.Qb5 c6 14.Qg5+=) 13.e4 (13.d3 Bd6+=) 13...Nbd7 (13...Be7 14.Rfc1+=) 14.e5 Nd5 (14...Ng4 15.Rfc1+=) 15.Nd5 cd5 16.Qb5 b6 17.Rfc1 Be7 18.Rc2 (18.Rc6 Rc8+=) 18...0–0 (18...a6 19.Qd3+=) 19.Qa6 (19.Rac1 a6 20.Qd3 a5+=) 19...f6 20.ef6 (20.Qe2 fe5 21.Ne5 Bf6+=) 20...Bf6 21.Bf6 Qf6 22.Re1 (22.d4 Rf7+=) 22...e5 (22...Qg6 23.Rc3 e5+=) 23.Qb5+/– Qd6? (better is 23...Qf7 24.d3 a6+=) 24.Rc6+– (24...Qe7 25.Qd5 Qf7 26.Qf7 Rf7 27.Ne5 Ne5 28.Re5+–) 1–0. Mehlhorn,U – Bartelt,K, BFO–069, 2000.

8.a3 Bd6 9.0–0 =.

8.a3 Bd6 9.d3 Bg6 10.Ne5 a5 11.b5 a4 12.Ng6 hg6 13.Bf3 Ra7 14.Bd4 Qe7 (14...Bh2? 15.Be5 Nfd5 16.Qe2+–; worse is 14...Rh2 15.Rh2 Bh2 16.g3+–) 15.Qc2 0–0 (15...Rh2? 16.Rh2 Bh2 17.g3+–) 16.0–0 e5 17.Bb2 Rd8 18.Nc3 Qe6 19.Rfc1 Qf5 20.Rd1 g5 21.Ne4 Ne4 22.Be4 Qd7 23.d4 ed4 24.Bd4 Qb5 25.Rab1 Qe8 (25...Qd7!?+=) 26.Bh7+– Kf8 27.Qf5 (better is 27.Qc3 f6 28.Bf6+–) 27...Qe7= 28.Qh3 (worse is 28.Bb6 cb6 29.Qh3 g6 30.Qh6 Ke8+=) 28...Qe6? (better is 28...g6!?=) 29.Bf5+/– Qh6 30.Qh6 gh6 31.Bf6 Raa8 32.Bd8 Rd8 33.Be4 Nc4? 34.Rd4+– Nb6 35.Bb7 Ke7 36.Bc6 Ba3 37.Rd8 Kd8 38.Ba4! Na4 39.Ra1 Bd6 40.Ra4 Ke7 41.Re4 Kf6 42.Kf1 Kf5 43.Re8 Kg6 44.Ke2 h5 45.Rg8 Kf6 46.h3 Kf5 47.f3 Kf6 48.Kd3 Kf5 49.Kd4 Bg3 50.Kd5 Bf2 51.g4 hg4 52.hg4 Kf6 53.e4 Bg3 54.Re8 White prepares e5 54...Kg7 55.e5 1–0. Dominguez,JM (2345) – Baules,Jorge (2315), 38th Olympiad, Dresden GER, 2008. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Bf5 4.e3 Nbd7 5.c4 dc4 6.Bc4 Nb6)

8.a3 Be7 9.0–0 0–0 10.d3 h6 11.Nc3 Bh7 12.Rc1 c6 13.e4 a6 14.Qd2 Qc7 (14...a5 15.b5=) 15.h3 (15.Nd1 a5+=) 15...Nfd7 16.Qe3 White plans e5 16...Rfd8 17.d4 White prepares the advance e5 17...Bd6 (17...a5 18.b5=) 18.e5 (18.g3 e5+=) 18...Be7 19.Rfd1 Qb8 20.Nd2 Nd5 21.Nd5 cd5 22.f4 (22.Rc3 Rc8+=) 22...b5= 23.Nb3 Nb6 24.Na5 Rc8 25.Rc6 (25.Nc6 Qb7 26.Ne7 Qe7=) 25...Nc4 26.Bc4 (26.Qc3!?+=) 26...bc4–/+ (worse is 26...dc4 27.d5 ed5 28.Rd5=) 27.g4 (27.Rc5 Bc5 28.dc5 Qc7–+) 27...Bc2 (27...Qb5 28.Rc5 Qa4 29.Rd2–+) 28.Rd2 (28.Rc1 Ba4 29.Rc8 Qc8–/+) 28...Ba4 (28...Be4!? 29.Rc5 Bc5 30.dc5–+) 29.Rc8–/+ Qc8 30.Qf3 Qd7 (better is 30...Rb8!?–/+) 31.Nc4= Rb8 32.Ne3 (32.Na5!?=) 32...a5+= 33.Bc3 (33.ba5 Rb3+=) 33...ab4 (33...Qc7 34.Nd1–/+) 34.ab4 (34.Bb4 Bb4 35.ab4+=) 34...Bb4 (better is 34...Qc7!? 35.Nf1 Rc8–/+ (worse is 35...Bb4 36.Bb4 Rb4 37.f5+=)) 35.Rb2= Qe7 36.Qf2 Rb5 37.Qd2 Bc3 38.Qc3 Rb2 39.Qb2 Qh4 40.Kg2 (40.Qb8 Kh7 41.Qb1 Kg8=) 40...Qe1 41.Qf2 Qc3 42.Nf1 Bc2 43.Ng3 Be4 44.Kh2 (worse is 44.Ne4 de4 45.f5 e3–+) 44...Qc2 (44...g6!?+=) 45.Qc2= Bc2 46.f5 Kf8 47.fe6 fe6 48.Ne2 Kf7 49.Kg3 g5 50.Kf2 Kg6 51.Ng3 Kf7 ½–½. Korinkova,Eva (1815) – Milcova,Zuzana (2025), Ceskoslovenska Extraliga Zien, 2014.

5.c4 c6

6.a3 a5 7.Nc3 =.

6.a3 g6 7.Nc3 (7.cd5 cd5 8.Nc3 e6+=) 7...e6 (7...Bg7 8.Qb3 dc4 9.Bc4=) 8.Be2 (8.cd5 cd5 9.h3 h5+=) 8...Bg7 (8...dc4 9.Bc4 Bg7 10.0–0=) 9.Nd4 (9.cd5!? Nd5 10.Qb3=) 9...dc4+= 10.Nf5 ef5 11.Bc4 Ne5 12.Qe2 (better is 12.Be2!? Nd3 13.Bd3 Qd3 14.Qe2+=) 12...b5–/+ 13.Nb5 Nc4 14.Qc4 cb5 15.Qb5 Qd7 (15...Kf8 16.Rc1–/+) 16.Qd7 Kd7 17.Rc1 ½–½. Chaparro Grande,Fernando – Sosa Suarez,Nestor, Gran Canaria Spain, Cabildo Memorial, 2015.

6.b5 Qb6 7.Nc3 e6 8.Be2 Bd6 9.Nh4 Bg6 10.Ng6 hg6 11.g3 (11.bc6 bc6 (worse is 11...Qb2 12.Rb1 Qa3 13.cd7 Nd7 14.cd5+/–) 12.Rb1 Qa5=) 11...Rc8 (11...dc4 12.Bc4 a6 13.a4+=) 12.a4 (12.bc6 A) worse is 12...Qb2 13.Rb1 Qa3 14.cd7 Nd7 15.cd5+/– (15.Rb7?! dc4 16.Nb5 Qa6+/–); B) 12...Rc6?! 13.cd5 ed5 14.Rb1+=; C) worse is 12...Qc6 13.cd5 ed5 14.Rc1+=; D) 12...bc6 13.Rb1 Qa5=) 12...e5 13.cd5 cd5 14.Bf3 (14.a5 Qc7=) 14...e4+= 15.Bg2 (15.a5 Qd8 16.Be2 Ne5+=) 15...Ne5–/+ 16.0–0 Bb8 17.Ne2 Qe6 18.Nd4 Qd7 19.Rc1 Rd8 (19...Rc1 20.Qc1 Nd3 21.Qc3+=) 20.Qe2 Nd3 21.Rb1 Ng4 22.h3 Nge5 23.f4 (23.Bc3 Rh3 24.f4 Rg3 25.fe5 Be5+=) 23...ef3–/+ 24.Nf3 Nb2 25.Rb2 Nc4 26.Rc2 Bg3 27.d3 Nd6 28.Nd4 Qe7 29.Qf3 Be5 30.Re2 0–0 31.Kh1 Rfe8–/+ 32.Nb3? Nf5–+ 33.Rc2 Ng3 34.Kg1 Nf1 (34...Nf1 35.Bf1 Qa3–+) 0–1. Nemeth,Laszlo – Hidegh,Eszter (2180), Fuzesabony op, 2003.

6.b5 e6 7.cd5 ed5 (7...cd5 8.Be2=+) 8.d4 (8.bc6!? bc6 9.Nd4=) 8...Bb4 (8...cb5 9.Bd3 Bd3 10.Qd3 Bb4 11.Nbd2=+) 9.Nbd2 0–0 10.Be2 (10.Qa4 Qe7 11.a3 Bd6=+) 10...Rc8 (10...cb5 11.Qb3 Qe7 12.a3=+) 11.a3 (11.Qb3 c5 12.dc5 Ba5=) 11...Ba5 (11...Bd6 12.Rc1=+) 12.0–0 c5 (better is 12...cb5!? 13.Rc1 Rc1 14.Qc1 a6=+) 13.dc5 Nc5 14.Bf6 (14.Rc1 Qe7+=) 14...Qf6= 15.Nd4 (15.Nb3 Nb3 16.Qb3 Be4=+) 15...Bg6 (15...Bc3 16.Nf5 Ba1 17.Ng7–/+) 16.N2f3 (16.Bg4 Ne6=+) 16...Rfd8 (16...Bc3 17.Ra2–/+) 17.a4 (17.Rc1 Be4=+) 17...Ne4 18.Rc1 h6 (18...Nc3!? 19.Qd2 Be4=+) 19.Rc8 Rc8 20.Qa1 Bc3 (20...Nc3 21.Rc1=+) 21.Qc1 (21.Qa2 Rc5=) 21...Qd8 (21...a5 22.Qd1=+) 22.Qd1 Bb4 23.Ne5 Qd6 (23...Nd2!? 24.Bg4 Rb8 25.Ng6 Nf1 26.Kf1 fg6=+) 24.Ng6 Qg6 25.f3 (better is 25.Qb3!? Qd6 26.Nf5+=) 25...Nc3 26.Qd2 Qd6 (26...Qg5 27.Nc2 Bd6 28.Bd3=+) 27.Bd3 (27.Nf5 Qe5 28.Bd3 Bc5=+) 27...Ne4 (27...Na4 28.Qa2 Qe5 29.Nc2=+) 28.fe4?? (better is 28.Qb2 Bc3 29.Qc2=) 28...Bd2–+ (29.Nf5 Qa3–+) 0–1. abt – Chakra, Live Game Caissa's Web, 2004.

6.Nc3 e6 7.Qb3 Be7 8.Nd4 0–0 (better is 8...Bg6!?=) 9.Nf5 ef5 10.Be2 (10.cd5 c5 11.b5 Nb6+=) 10...Nb6 (10...dc4 11.Bc4 Ne5 12.Ne2 Nc4 13.Qc4=) 11.d3 Qc7 12.0–0 dc4 13.dc4 Ng4 The mate threat is Qxh2 14.Bg4 fg4 15.c5 Nd7 16.Ne4 Ne5 17.Rfd1 Rad8 18.Nd6 Bf6 19.Rd2 Rd7 20.Rad1 Rfd8?? (20...Re7 21.e4+/–) 21.Qc2 (21.Be5 Be5 22.Nf7 Bh2 23.Kh1 Rd5 24.Nd8 Kh8 25.Rd5 cd5 26.Qd5 h6 27.Nf7 Kh7 28.Qf5 Kg8 29.Rd8 Qd8 30.Nd8 Bb8+–) 21...Re7?? (better is 21...g3 22.fg3 Ng4 23.Bf6 Nf6+/–) 22.Nb5! Rd2 (22...cb5 23.Rd8 A classical mating theme) 23.Qd2 (better is 23.Nc7 Rd1 24.Qd1+–) 23...Qb8+/– 24.Nd6 (24.Qd8 Re8 25.Qb8 Rb8 26.Na7 Kf8+/–) 24...h5 25.Qc2 Re6 26.Qf5 g6 27.Qf4 Qd8 28.Kf1 g5 29.Qf5+– Qe7 30.Ne4 Kg7 31.Nf6 Qf6 32.Qf6 Kf6 33.Rd7 Kg6 34.Be5 Re5 35.Rb7 a5 36.a3 ab4 37.ab4 Kf6 38.Rd7 Re4 39.Rd6 Re6 40.Re6+– Ke6 41.Ke2 Kd5 42.Kd3 f5 43.g3 h4 44.Kc3 Ke4 45.b5! cb5 46.c6 (46.c6 hg3 47.hg3+–) 1–0. Kreuzer,Uwe – Gehrig, tt Mannheim, 1980.

6.Nc3 e6 7.b5 cb5 8.cb5 Be7 9.Be2 0–0 10.0–0 Nc5 11.d4 Nce4 12.Ne4 Be4 13.Rc1 Bf3 14.Bf3 Qd7 15.Qb3 Rfc8 16.a4 Ne8 17.e4 de4 18.Be4 Nf6 19.Bb1 Nd5 20.Rc2 g6 21.Rfc1 Bg5 22.Rc8 Rc8 23.Rc8 Qc8 24.g3 Bc1 25.Bd3 Bb2 26.Qb2 Qc3 27.Qc3 Nc3 28.a5 Kf8 29.Kg2 Ke7 30.Kf3 Nd5 31.Bc4 Kd6 32.Ke4 h6 33.h4 Nc3 34.Kd3 Nd5 35.f3 Nb4 36.Ke4 Nd5 37.f4 f5 38.Kd3 h5 39.Kd2 b6 40.Bd5 ed5 41.ab6 ½–½. Krebbers,Wilfried (2155) – Remy,Janina (1855), Goch op, 2006.

6.Nc3 e6 7.cd5 ed5 =.

6.c5 h6 7.Be2 e6 8.a4 (8.Nd4 Be4 9.0–0 e5+=) 8...a6 (8...a5 9.0–0+=) 9.Na3 (9.d4 b6=) 9...Be7 (9...a5 10.Nc2–/+) 10.Ne5 Ne5 11.Be5 0–0 12.Bf6 Bf6 13.d4 Re8 14.0–0 Qc7 15.Bd3 Bd3 16.Qd3 e5 17.Nc2 e4 18.Qe2 Qd7 19.Na3 a5 20.b5 Rec8 21.Rab1 Bd8 22.Rb2 b6 23.cb6 Bb6 24.bc6 Rc6 25.Rb5 Rac8 26.Qb2 Bd8 27.Rb7 Bc7 28.Nb5?? Bh2!–+ 29.Kh2 Qb7 30.Qd2 Rc2 31.Qa5 Qa8 32.Qa8 Ra8 33.Ra1 Ra5 34.Kg3 Rc4 35.f3 ef3 36.Kf3 Raa4 37.Ra4 Ra4 38.Nc7 Ra5 39.Kf4 f6 40.g4 Kf7 41.e4 de4 42.Ke4 Ra7 43.Nb5 Rd7 44.Nc3 Kg6 45.Nd1 Kg5 46.Nf2 h5 47.gh5 Kh5 48.Nd3 g6 49.Nf4 Kg5 50.Ne6 Kg4 51.Nf8 Re7 52.Kd5 Kf5 53.Kd6 Re8 54.Nd7 g5 55.d5 g4 0–1. Hal1958 – Fatou, playchess.de, 2002.

6.d4 e5 7.a3 e4 8.Nfd2 Bd6 9.Be2 h5 (9...Qb8 10.h3=) 10.Nc3 Be6 11.b5 (11.Rc1 Bg4=) 11...Ng4= 12.bc6 bc6 13.Qa4 Rc8 (13...Bh2 14.Qc6 Rc8 15.Qa4 dc4 16.d5+– (16.Qa7 Ra8 17.Qb7 Rb8 18.Qe4 Rb2–/+; 16.Bc4?! Bc4 17.Nc4 Qc7+=; 16.Nde4?! Bb8+/–; 16.Nc4?! Bc4 17.Bc4 Qe7+/–)) 14.cd5+/– (14.Qa7 Ra8 (worse is 14...Nh2 15.Qa4+=; worse is 14...Bh2 15.Qa4+=) 15.Qb7 Rb8 16.Qc6 Rb6+=) 14...cd5 15.Nb5 (15.h3!? Ngf6 16.0–0+= (16.Qa7? Ra8 17.Qb7 Rb8–+)) 15...Bb8= 16.Na7?? (better is 16.Qa6=) 16...Ba7–+ 17.Qa7 Ra8 18.Qb7 Rb8 19.Qc6 Rb2 20.h3 Nf2 21.Kf2 Rd2 22.Qc3 Re2 23.Ke2 0–0 24.Rhc1 Qg5 25.Rg1 Nb6 26.a4 Bc8 27.a5 Ba6 28.Kf2 Qf6 29.Kg3 Qd6 30.Kf2 Rc8 31.Qb3 Qf6 32.Kg3 Qd6?? 33.Kf2 Nc4 34.Rge1 Rb8 35.Qd1 h4 36.Qg4 Rb2 37.Kg1 Qf6 38.Rf1 Qh6 39.Qd7 Qe3 40.Kh1 Qg5 Do you see the mate threat? 41.Qf7 Kh7 42.Rf2 Rf2 43.Qf2 Nd6 44.Qc2 Nc4?? 45.Qf2 Qf6 46.Qe2 g6 47.Qg4 Ne3 48.Qd7 Kh6 49.Rg1 Bf1 50.Qc8 Kg5 51.Qd7 Kh6?? 52.Qc8 Bg2 53.Rg2 Ng2 54.Kg2 e3 55.a6 Qf2 56.Kh1 Qf3 57.Kg1 Qg3 58.Kh1 e2 59.Qf8 Kh5 60.Qh8 Kg5 61.Qd8 Kf4 62.Qd6 Ke3 63.Qa3 Kf2 64.Qf8 Qf3 (64...Qf3 65.Qf3 Kf3 66.Kh2 Kf2 67.a7 e1Q 68.a8Q Qg1#) 0–1. Cernik,Lukas – Hoffman,Matej, CZE–ch U18 Czechia, 1999.

6.d4 e6 7.c5 b6 8.Be2 Rb8 9.a3 bc5 10.dc5 (10.bc5?? Rb2 11.0–0 Ne4–+) 10...Bc5 11.Bf6 Qf6 (worse is 11...Nf6 12.bc5 Bb1 13.Rb1 Qa5 14.Nd2+/–) 12.Ra2 (12.Nbd2 Bc2! 13.Qc1 Bd6–/+) 12...Bd6 13.Nd4 Rc8 (13...Be4 14.0–0 Qg6 15.f3 Bb1 16.Qb1–/+) 14.Nd2 e5 15.N4b3 (better is 15.Nf5!? Qf5 16.Bg4–/+) 15...0–0–+ 16.Na5 Rfe8 17.Qa4 Nb6 18.Qb3 (18.Qd1 c5 19.Nb7 c4–+) 18...Be6 (18...c5 19.0–0–+) 19.Qc2 d4 (19...c5!? 20.b5–+) 20.Ne4 Qd8?? (better is 20...Qe7 21.Bc4 c5 22.Be6 Qe6 23.bc5 Bc5 24.Nc5 Qe7–/+) 21.Nb7+= Qd7? (better is 21...Bb4 22.ab4 Qe7 23.Ra7 Qb4 24.Kf1 Ra8 25.Ra8 Ra8+=) 22.Nbd6+– (22.Ned6?! Rb8 23.Ne8 Rb7 24.Nf6 gf6+/–) 22...Ba2 23.Qa2 Re6? (23...Rcd8 24.Ne8 Qe8 25.ed4 ed4+–) 24.Nc8 Nc8 25.Bg4 de3 26.0–0 (worse is 26.Be6 ef2 27.Nf2 fe6+–) 26...ef2 27.Qf2 Qd3 (27...Qe7+–) 28.Qf7 (28.Qf7 Kh8 29.Qf8 mate) 1–0. Beljushina,Sonja (1635) – Suleymanov,Salavat, Sterlitamak RUS, Rochinskiy Open, 2012.

6.Nd4 Be4 7.f3 e5 8.fe4 ed4 9.ed5 de3 =.

6.cd5 cd5 7.Bb5 a6 8.Bd7 Nd7 (8...Qd7 9.0–0=) 9.0–0=+ Bg4 (9...Qb6 10.Qa4=+) 10.h3= Bf3 (10...Bh5 11.Nc3 Ne5 12.Rc1=) 11.Qf3 (< 11.gf3 e6–/+) 11...Nf6 (11...e6 12.Rc1=) 12.Nc3 (12.Bf6 gf6 13.Rc1 e6+=) 12...e6 (12...e5=) 13.Qg3 (13.a3 Bd6=) 13...h5 (13...Bb4 14.Qg7 Rg8 15.Qh6=+) 14.f4 h4=+ 15.Qf3 Bb4 16.Rab1 b5 17.a3 Bc5 18.d4 Bb6 19.f5 Qd6 20.fe6 fe6 21.Rbc1 Rd8 22.Ne2 Rh5 23.Nf4 Rf5 24.Qe2 Bc7 25.Rc7 (25...Qc7 26.Ne6 Rf1 27.Qf1–+). Rohrbacher,Walter – Fath,Michael, Baden–chS nestor, 2001.

6.cd5 Nd5 7.Qb3 Qc7 8.d3 Bg6 9.Nbd2 e5 10.a3 Be7 11.Rc1 Qb8 12.Nc4 e5 becomes the focus of attention 12...Bf6 13.g3 0–0 14.e4 N5b6 15.Ne3 a5 16.Be2 ab4 17.ab4 Na4 18.Ba3 Re8 19.0–0 Nf8 (19...Be7 20.Ra1+=) 20.h4 (better is 20.b5!?+=) 20...Ne6 21.Ng4 ½–½. Dias,Jose OG (1635) – Marcal,A (1820), VII Open Figueira da Foz POR, 2010.

6.Be2 dc4 7.Bc4 e6 8.a3 +=.

6.Be2 dc4 7.Bc4 e6 8.b5 +=.

6.Be2 Qc7 7.Nc3 e5 8.cd5 cd5 (better is 8...Bb4!? 9.dc6 bc6=) 9.Nb5+/– Qb8 (better is 9...Qb6!? 10.Be5 Ne5 11.Ne5 Bd6 (11...Bb4? 12.Qa4 Bd2 13.Kd2+–) 12.Nd6 Qd6 13.Qa4 Nd7+/–) 10.Rc1+– Bb4 11.Nc7 Ke7 (11...Kf8 12.Na8 Qa8 13.Ne5 (13.Be5?! Ne5 14.Ne5 Ba3+/–) 13...Ne5 14.Be5+–) 12.Ne5 Ne5 13.Be5 (13.Na8 Bd6 14.g4 Neg4 15.Bg4 Ng4 16.Bg7 Rg8–/+ (16...Qa8?! 17.Bh8 Qh8 18.Qb3=)) 13...Bd6 14.Bd6 Kd6 15.Qa4 Qd8 (15...Ke7+–) 16.Qb4 Kd7 17.Bb5 Kc8 18.Na6 1–0. Janek – Larry, internet free game, 2017.

6.Be2 e5 7.Qb3 Be7 (7...Bd6 8.c5 Bc7 9.0–0+=) 8.0–0 (8.Ne5 Ne5 9.Be5 dc4 10.Bc4 0–0+=) 8...0–0 (8...Bg4!?=) 9.Ne5+= Ne5 10.Be5 dc4 11.Qc4 (11.Bc4 b5 12.Be2 Nd5+=) 11...Nd5 (11...Be6 12.Qc3+=) 12.a3 f6 13.Bg3 Bd6 (better is 13...Be6!?+/–) 14.e4+– (14.e4 Bg3 15.fg3+– (15.ef5?! Bc7+=)) 1–0. fryckh – jaqufe, internet, 2017.

6.Be2 h6 7.0–0 e6 8.b5 Bd6 9.Nd4 Qc7 (9...Bh7 10.bc6 bc6 11.f4=) 10.h3 (10.Nf5!? ef5 11.cd5 Bh2 12.Kh1 cd5 13.g3 Bg3 14.fg3 Qg3 15.Rf3 Qh4 16.Kg2=) 10...Bh7 11.Nc3 c5 12.Nf3 Nb6 (12...dc4 13.Bc4 0–0 14.Be2=) 13.cd5 e5 The passed pawn on d5 quickly leads to threats 14.Rc1 Nbd5 (better is 14...0–0!?+=) 15.Nd5+/– Nd5 16.d4 ed4 17.ed4 Nf6 18.dc5 Bc5 19.Bf6 gf6 20.Qd5 Rc8 21.Rc4 Qd7?? (better is 21...Qb6+/–) 22.Rc5+– Qd5 23.Rd5 Rc2 24.Bd3 Bd3 25.Rd3 Ra2 26.Re1 Kf8 27.Nh4 Kg7 28.Re7 f5 (28...Rf8 29.Rb7 a6 30.b6+–) 29.Rdd7 (29.Rd6!? Rf8 30.Nf5 Kg8 31.Nh6 Kg7 32.Nf5 Kg8+–) 29...Rf8 30.Nf5 (30.Rd6!? Kg8 31.Rb7 f4+–) 30...Kg6 31.Nh4 Kf6 32.Rb7 a5 33.Ra7 a4 34.Re4 Rb2 35.Rea4 Rb5 36.R4a6 Kg7 37.Ra5 Rb6 38.R7a6 Rfb8 39.Rb6 Rb6 40.Ra3 h5 41.Rg3 Kf6 42.Rg8 Rb1 43.Kh2 Rb2 44.f3 Rb4 45.Kg3 Rb3 46.Ra8 Kg5 47.Ra5 Kf6 48.Rh5 (48.Rh5 Ra3 49.Kg4+–) 1–0. Najjar,Ahmad – Merritt,Mario, Wch U20 Gausdal, 1986.

5.c4 e6

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

6.b5 dc4 7.Bc4 Nb6 8.Be2 (--> 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3 Nb6 8.Be2).

6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.d3 e5

6.Be2 Bb4 7.Bc3 (7.Nbd2 Qe7–/+) 7...Qe7 (7...Bd6 8.Nbd2–/+) 8.0–0 (8.Bb4 Qb4 9.Nbd2 Qc3–/+) 8...Bc3 (8...0–0 9.Bb4 Qb4 10.Nbd2–/+) 9.Nc3 c6 10.Rb1 b6 11.a4 (11.Qd2 Bg4–/+) 11...0–0 12.e4 (12.Qd2 Rab8–/+) 12...de4–+ 13.de4 Ne4 14.Ne4 Be4 15.c4? Rfd8 16.Qb3 c5 17.Rfd1? Nf6 18.Nd2? Bb7 19.Nf1 Rd1 20.Rd1 Rd8 21.Ne3 Rd1 22.Qd1 Qd7 23.Qd7 Nd7 24.Nd5 Bd5 25.cd5 Kf8 26.Bb5 Ke7 27.f3 Nf6 28.Bc6 Kd6 29.Kf2 Nd5 30.Be8 f5 31.Bf7 a6 32.Ke2 b5 33.ab5 ab5 34.Kd3 c4 35.Kc2 Kc5 36.Bg8 h6 37.Bh7 f4 38.Be4 b4 39.g4 fg3 40.hg3 Kd4 41.g4 g5 (42.Bg6 b3 43.Kb2 Nf4–+; better is 41...b3!? 42.Kb2 Nb4 43.Bb1–+) 0–1. TresHuevos – yaman, Live Game Caissa's Web, 2005.

6.Ne5 Bb4 7.Nd2 =+.

5.d4 e6

6.a3 Bd6 7.c4 dc4 8.Bc4 c6 9.0–0 0–0 10.Re1 Qc7 11.h3 e5 12.de5 Ne5 13.Ne5 Be5 14.Qb3 Bb2 15.Qb2 Rad8 16.Nd2 Rfe8 17.Nf3 Be4 18.Ng5 Bd5 19.Be2 Re7 20.Red1 Red7 21.Rd2 h6 22.Nf3 Bf3 23.Rd7 Rd7 24.Bf3 Qd8 25.Qb3 Kf8 26.Rd1 Rd1 27.Qd1 Qd1 28.Bd1 Ke7 29.Bb3 Ne4 30.f3 Nc3 31.Kf2 f6 32.e4 Kd6 33.Ke3 c5 34.Kd3 Nb5 35.a4 Nd4 36.bc5 Kc5 37.Bd1 Ne6 38.g3 Kb4 39.f4 Kc5 40.h4 g5 41.f5 Nd8 42.Kc3 Nc6 43.hg5 hg5 44.g4 Kd6 45.Kd3 Ke5 46.Ke3 Nd4 47.a5 a6 48.Ba4 Nb5 49.Bb3 Nd6 50.Bd5 Nb5 51.Bb7 Nc7 52.Bc8 Kd6 53.Kd4 Nb5 54.Kc4 Nc7 55.Ba6 Na6 56.Kb5 Nb8 57.a6 Na6 58.Ka6 Ke5 59.Kb5 Ke4 0–1. Hetfleis,Enrico – Strauss,Peter, Dresden, 2000.

6.a3 Bd6 7.Bd3 Bd3 8.Qd3 c6 9.Nbd2 0–0 10.0–0 a5! 11.c3 Re8 12.e4 e5! 13.Rfe1 de4 14.Ne4 Ne4 15.Re4? Nf6 16.de5 Ne4 17.Qe4 Bf8 18.Re1 Qd5 19.Qf4 Qb3 20.Qc1 c5 21.Re3? Rad8! 22.Nd2 Qd5 0–1. Fournier – Cozette, Amiens 1994 (Fournier).

6.b5!? =+.

6.c3 Bd6 7.Bd3 Bd3 8.Qd3 c6 (8...Nb6 9.Ne5=+) 9.0–0=+ 0–0 10.Nbd2 h6 (10...a5 11.ba5 Qa5 12.c4=+) 11.a4 (11.e4 de4 12.Ne4 Ne4 13.Qe4 Nf6=+) 11...a6 (11...a5 12.b5=+) 12.a5= Qc7 13.Rfc1 (13.e4 de4 14.Ne4 Ne4 15.Qe4 Nf6=) 13...Ng4 (13...Rad8 14.e4 e5 15.Re1=) 14.h3 Ngf6 ½–½. Heyn – Bivens, corr 3GMM–25, 1995.

6.Bd3 Bb4 7.c3 Bd3 8.Qd3 (8.cb4 Be4–/+) 8...Bd6 9.Nbd2 0–0 (9...c5 10.c4–/+) 10.0–0 c5 (10...b5 11.a4 ba4 12.Rfb1–/+) 11.e4 (11.c4 Rc8–/+) 11...de4 (11...cd4 12.Qd4 e5 13.Qe3–+) 12.Ne4 Ne4 13.Qe4 cd4 14.cd4 Nf6–+ 15.Qe2 Rc8 16.Rac1 Qb6 17.Ne5 Be5 18.de5–/+ Nd5 19.g3 Qa5 20.a3 Rc1 21.Rc1 Rd8 22.Qc2 h5 23.Qe2 g6 24.h3 Qb6 25.g4? Nf4–+ 26.Qc2 Nh3 27.Kh2 hg4 28.f3 Qe3 29.Rd1 Rd1 30.Qd1 Qf2 31.Kh1 Qf3 32.Qf3–+ gf3 33.Bd4 a6 34.Kh2 Ng5 35.Kg3 Kh7 36.Be3 Ne4 37.Kf3 Nc3 38.Bc5 Kh6 39.Kg4 Nd5 40.Kf3 Kg5 41.Ke4 a5 42.Kd4 (42...b5 43.Ke4–+; 42.Kd3 b5–+). Bull_Dog_Baz – golly1, ChessWorld.net, 2007.

6.Bd3 Bd3 7.Qd3 Bb4 8.Nbd2 0–0 9.c3 Bd6 10.0–0 c5 11.c4 cd4 12.Bd4? (better is 12.Qd4!? e5 13.Qh4–/+) 12...e5–+ 13.Ne5 (13.cd5 ed4 14.Qd4 Re8–+) 13...Ne5 14.Be5 Be5 15.Rab1 b6 16.Nf3 Bc7 17.Rfd1 dc4 18.Qc4 Qe7 19.Qb4 Qb4 20.Rb4 Rad8 21.Rd8 Rd8 22.g3 Nd5 23.Rb2 f6 24.Nd4 Be5 25.Rd2 Nb4 26.a4 Nc6! 27.Nc6 (27.Nf3–+) 27...Rd2 28.Na7 Ra2 29.Nc8 Bc7 30.Ne7 Kf7 31.Nd5 Bd8 0–1. nxito – Snicks, ChessWorld.net, 2012.

5.Nd4 Bg6

6.a3 e5 7.Nf3 Bd6 8.Be2 0–0 9.Nh4 c5 10.Ng6 fg6 11.bc5 Nc5 12.0–0 Rc8 13.Nc3 a6 14.d4 Ne6 15.de5 Be5 16.Na4 Bb2 17.Nb2 d4 (better is 17...Rc3!?+=) 18.Bc4+= Re8 19.ed4 Kh8 20.Be6 Re6 21.Qd3 Qc7 22.c4 Rc6 23.Rfe1 Rd8 24.Rad1 Qb6 25.Rd2 Rcd6 26.c5 Qc5?? (better is 26...Re6 27.cb6 Re1 28.Qf1 Rf1 29.Kf1 Rd6+–) 27.dc5 Rd3 28.Rd3 (28.Rd3 Rc8 29.Na4+–) 1–0. Yannick – Snillie, playchess.de, 2005.

6.Nf3 e6 7.a3 Bd6 8.c4 c6 9.cd5 cd5 10.Nc3 0–0 11.Nb5 Be7 12.Rc1 a6 13.Nc3 b5 14.d4 Nb6 15.Ne5 Qd6 16.Ng6 fg6 17.Bd3 e5?? 18.Nb5!! Qd8 (18...ab5 19.de5) 19.Nc7 e4 20.Na8 Qa8 21.Be2 a5 22.b5 Qb8 23.Qd2 Bd6 24.Qa5 Nfd7 25.Qa6 Rf7 26.h3 Qf8 27.0–0 Qe7 28.Rc6 Nc4 29.Bc4 dc4 30.Rd6 Qg5 31.Qc8 Nf8 32.Qc4 h5 33.b6 Qe7 34.Rc6 Qd8 35.Rc7 Qb8 36.Qf7 1–0. mtr – bullwinkle, Internet, 2001.

5.Be2 c6

6.0–0 Qc7 7.d4 (7.Nh4 Bg6=) 7...e6 8.a3 Bd6 (8...a5 9.ba5 Bd6 10.c4=) 9.Nbd2 (9.c4 dc4 10.Bc4 0–0=) 9...b5=+ 10.a4 Rb8 (10...Bb4 11.c3 Be7 12.ab5 cb5 13.Bb5=) 11.ab5 (11.c3 Ne4=) 11...cb5 12.Ra5 (12.c3!?=) 12...Bb4–/+ (< 12...Qc2 13.Qc2 Bc2 14.Ba3=) 13.Rb5 Rb5 14.Bb5 Bc2 15.Qa1 Qb8 16.Rc1=+ Qb5 17.Rc2 0–0 18.Qa7 Qe2 19.Qa1 Qd3 20.Qc1 h6 21.Bc3 Bd6 22.Ba5 Ra8 23.Ne1 Qf5 24.Bc7 Ba3 25.Qb1 Ne4 26.Ne4= Qe4? 27.Qb7+/– Rf8 28.Qb3?? Be7= 29.f3 Qg6 30.Bg3 Nf6 31.Nd3 Ra8 32.Ne5 Qf5 33.Qd3 Qd3 34.Nd3= Ra3 35.Rd2 Bd8 36.Rd1 Nd7 37.Bf2 Nb6 38.e4 Nc4 39.ed5= ed5 40.Nf4 Bb6?? 41.Nd5+/– Ba7 42.Ne7 Kf8 43.Nc6 Ke8 44.Na7 Ra7 45.g3 Ra2+= 46.Rc1 Nd2 47.Kg2+/– Ra3 48.Re1 Kd7 49.Re3 Re3 50.Be3 Nb3 51.Kf2 Kd6 52.Ke2 Kd5 53.Kd3 Na5 54.g4 Nc6 55.h4 Ne7 56.Bd2 Nc6 57.Be3 Ne7 58.h5 f5 59.Bc1 fg4 60.fg4 Ng8 61.Ke3 (61...Nf6 62.Kf4+/–; 61.g5!? Ke6 62.Ke4 hg5 63.Bg5 Kf7+–) 1–0. Raheb,David (2140) – Tessier Desrosiers,Olivier, CAN–ch U18 Montreal, 2001.

6.0–0 e6 7.a3 =.

6.a3 Qc7 =.

6.a3 e6 =.

6.a4 Qc7 7.c4 e5=+ 8.Qb3 a5 9.b5 Bd6 10.d4 dc4 11.Bc4= 0–0 12.Nbd2 Ne4 13.Ne4 Be4 14.Ne5 Ne5 15.de5 Be5 16.Be5 Qe5 17.0–0 Rad8 18.Rfd1 Qg5 19.Bf1 Bd5 20.Qb2 Rde8 21.Qe2 f5=+ 22.bc6 bc6 23.Qd2 f4 24.ef4 Qf4 25.Qf4 Rf4 26.Rdc1 Ref8 27.f3= Kf7 28.Rc5 Ra8 29.Kf2 Ke6=+ 30.Ke3 Rb4 31.Ra3 Kd6 32.Rc2 h6 33.Bd3 Bb3 34.Rd2=+ Kc7 35.Bc2 Re8 36.Kf2 Bc2 37.Rc2 Re6 38.Rca2 c5–/+ 39.Rc3 c4 40.Rac2 Ra4 41.Rc4=+ Rc4 42.Rc4 Kb6 43.Rc8 a4–/+ 44.Ra8 Kb5 45.Rb8 Rb6 46.Ra8 Kb4 47.Ke3 Kb3 48.Kd2 a3 49.Ra7 a2 50.Kc1 Rb4 51.Ra8 Rc4 52.Kd2 Ra4 53.Rb8 Ka3 (54.Rd8 a1Q–+) 0–1. Krotki,Jan – Coudari,Camille, CAN–ch U18 playoff, 1969.

6.a4 e5 7.Ne5 Bb4 8.Nd7 Bd7 9.0–0 =.

6.c4 dc4

7.Bc4 e6

8.a3 a5 9.ba5 Bd6 10.a6 b5 11.Ba2 (11.Be2 Ra6 12.Nc3 Rb6=) 11...Ra6 (11...Nc5 12.0–0–/+) 12.0–0 (12.d4 0–0–/+) 12...0–0 (12...Bd3 13.Re1–/+) 13.d3 h6 14.e4 Bg4 15.h3 Bf3 16.gf3? (16.Qf3!? Ne5 17.Qe2=) 16...e5 (16...Nh5 17.Bc1–+) 17.Qc2 (17.f4!? ef4 18.Bb3–/+) 17...Nh5–+ 18.Kh2 Qh4 19.Bc1 Nf4 20.Bf4 Qf4 (20...ef4?! 21.d4–/+) 21.Kg2 c5 (better is 21...Bc5!? 22.Bb3 Bd4–+) 22.Nc3–/+ b4 (22...Rb8!?–/+) 23.ab4=+ cb4 24.Bf7 Rf7 (24...Kf7 25.Ra6) 25.Ra6 Qf3 26.Kh2 Qf4 27.Kg1 Qg5 28.Kh1?? (better is 28.Kh2 Qf4 29.Kh1 Qf3 30.Kh2 Qf4=) 28...Rf3–+ 29.Kh2 Qh4 (29...bc3?! 30.Rd6 Qh4 31.Qa2 (31.Qc3?? Rh3 32.Kg1 Qg5) 31...Kh7 32.Qe6–+) 30.Qb3 (30.Ne2 Rh3 31.Kg2 Rh2 32.Kf3 Qh5 33.Ke3 Qg5 34.Nf4 Bc5 35.Kd2 Qf4 36.Kd1 Bf2 37.Qe2–+) 30...Kh7 31.Qe6 bc3 (better is 31...Nc5 32.Qg4 Rf2 33.Kg1 Qg4 34.hg4 Rf1 35.Kf1 Na6–+) 32.Rd6 Nc5?? (32...c2 33.Rg1 A) 33...Qf2?! 34.Rg2 Rf6 35.Qd7 (35.Rf2? Re6 36.Re6 c1Q–+) 35...Qf4 36.Rg3=; B) 33...Nf8=+) 33.Qg6= (33.Qe5?? Qh3 34.Kg1 Qg4 35.Kh1 Rh3 36.Qh2 Rh2 37.Kh2 Qf4 38.Kh1 Qd6–+) 33...Kg8 34.Qg4?? (better is 34.Qg2 Qf4 35.Kg1 Rd3 36.Rg6=) 34...Rf2–+ 35.Rf2 Qf2 36.Qg2 Qg2 37.Kg2 c2 (38.d4 ed4 39.Rd4 c1Q 40.Rd8 Kf7–+) 0–1. Bonetti,Shane – mastodon, ICC, 2002.

8.a3 Nb6 9.Be2 Qc7 10.Nd4 Be4 11.f3 Bb1 12.Rb1 Bd6 13.f4 e5? (better is 13...0–0=) 14.Nf5+/– 0–0–0?? (better is 14...Nbd7 15.Ng7 Kd8+–) 15.Nd6+– (15.Ng7?! Nbd5 16.b5 c5+/–) 15...Qd6 16.fe5 (16.Be5?! Qd5 17.b5 c5+–) 16...Qd5 17.ef6 g6 (17...Qg2 18.Bf3 Qg5 19.fg7 Qh4 20.Ke2+–) 18.Bf3 Qd3 19.Be5 (19.Bg4!? Kb8 20.Be5 Ka8+–) 19...Nc4 (19...h5 20.Rb3 Qf5 21.Bc3+–) 20.Rb3 (20.Rb3 Qd2 21.Qd2 Rd2 22.Rc3 Ne5 23.Kd2 Rd8 24.Ke2+–) 1–0. Frank,Detlev (1835) – Schoknecht,Sabine, Pinneberg–ch, 2005. (=1.a3 d5 2.b4 Bf5 3.Bb2 Nd7 4.Nf3 c6 5.e3 Ngf6 6.c4 e6 7.Be2 dc4 8.Bc4 Nb6)

8.a3 Nb6 9.Be2 Bd3 10.Bd3 Qd3 11.Ne5 Qd5 12.0–0 Nc4 (12...a5!?+=) 13.Nc4 Qc4 14.d3 Qh4 15.Nd2 Bd6 16.Nf3 Qh5 17.e4 Bc7 18.Qc2 (18.Rc1 Bb6+=) 18...0–0= 19.Rab1 Rac8 20.Bd4 a6 21.Qc3 Rfd8 22.Rb3 Nd7 23.h3 (23.Bg7? e5–+) 23...e5 24.Be3 f6 (24...Nf6 25.a4+=) 25.a4 Bb6 26.Bc5 Qf7 (26...Nc5? 27.bc5 Bc7 28.Rb7+–) 27.Rfb1 Bc7 (27...Nc5? 28.bc5 Bc7 29.Rb7+–) 28.Nd2 (28.Qc2 A) worse is 28...Nc5 29.bc5 (29.Qc5?! Ra8=) 29...Qd7 30.Qc4 Kf8 31.R1b2+/–; B) 28...Nf8=) 28...Nf8 (worse is 28...Nc5 29.bc5 (29.Qc5?! Rd4=) 29...Qd7 30.Qc4 Kf8 31.Nf3+/–) 29.Bf8 Kf8 30.b5 cb5 31.ab5 Bb6 32.Nc4 Bd4 (32...a5 33.Ra3=) 33.Qd2 Kg8 34.ba6 ba6 35.Qa2 h6 (35...Qe6 36.Rb7+=) 36.Rb7 (36.Ra3 Rb8+=) 36...Qe6 37.Qe2 Rd7 38.R7b3 Kh7 39.h4 Rf8 40.Qf3 f5 41.Rb8 Rb8 42.Rb8 f4 43.h5 Rf7 44.Kh2 Qd7 45.Qh3 Qh3 46.Kh3 Re7 47.f3 Re6 48.Rb7 Kg8 49.g3 fg3 50.Kg3 Rf6 (50...g6 51.f4=) 51.Rd7+= g6 52.Rd5 Attacking the isolated pawn on e5 (52.f4 ef4 53.Kf3 Bc3+=) 52...gh5= 53.Ne5 h4 54.Kh4 Be5 55.Re5 Rf3 56.Rd5 Kf7 57.Kg4 Rf1 58.d4 Rf6 59.Rc5 Rf1 60.e5 Ke6 61.Rc6 Kd5 62.Rd6 Ke4 63.e6 (63.Rh6?? Rg1 (63...Kd4?! 64.e6=) 64.Kh4 Rh1 65.Kg5 Rh6 66.Kh6 Kf5–+) 63...Rg1 64.Kh3 Kf3 65.Kh2 Rg2 66.Kh1 Re2 67.Ra6 Ke4 68.Rd6 Kf3 69.Kg1 Re1 70.Kh2 Re2 71.Kg1 Re1 ½–½. Fries Nielsen,J O (2455) – Boe,M (2340), Kemp Lauritzen IM, 2015. (=1.e3 d5 2.c4 c6 3.Nf3 Nf6 4.b4 Bf5 5.Bb2 e6 6.a3 Nbd7 7.Be2 dc4 8.Bc4 Nb6)

8.a3 Nb6 9.Be2 Bd6 10.Nh4 =.

8.a3 Qc7 9.d3 Bd6 10.h3 0–0 11.Nfd2 (11.Nh4!?=) 11...Rad8 (11...b5!? 12.e4 bc4 13.ef5 cd3 14.fe6 fe6+=) 12.Qe2 Nb6 13.e4 Nc4?? (better is 13...Be5 14.Bc3 Bg6=) 14.Nc4+– Bg6 15.e5 (15.Nd6?! Qd6 16.e5 Bd3+=) 15...Bd3 (15...Be7 16.ef6 gf6+–) 16.Qe3?? (better is 16.Qd3 Be7 17.Qe3+–) 16...Bc4–/+ 17.ed6 (17.ed6 Qd6 18.Rc1–/+). Perpete,Raymon (1925) – Escriva Agud,Salvador, Benidorm op U2000, 2007. (=1.Nf3 d5 2.b4 Bf5 3.Bb2 e6 4.e3 Nf6 5.a3 Nbd7 6.c4 dc4 7.Bc4 c6 8.0–0 Qc7)

8.a3 Be7 9.0–0 0–0 10.Nh4 (10.Nd4 Nb6 11.Be2 Bg6=) 10...Be4 11.d3 Bd5 12.Nd2 Bc4 (12...a5 13.b5=+) 13.Nc4= b5 14.Ne5 (14.Na5 Qc8=) 14...Ne5 15.Be5 Nd7 (15...a5 16.Rc1=+) 16.Nf3= Ne5 17.Ne5 Qd6 (17...Bd6 18.d4=) 18.d4 f6 (18...Bf6 19.f4=) 19.Nd3+= Bd8 (19...Rfd8 20.Nc5 Qd5 21.e4 Qd4 22.Ne6 Qd1 23.Rfd1 Rd1 24.Rd1=) 20.Nc5 Bc7 21.g3 (better is 21.Qh5+=) 21...Rad8? (21...Bb6 22.Ne4 Qd5 23.Qc2=) 22.Qc2 Bb6? 23.a4 Bc5 24.bc5 Qd5 25.ab5+/– cb5 26.Ra7 b4 27.Qb2 Rb8 28.Rb1 b3 29.Ra3+– e5 30.Rb3 Rb3 31.Qb3 Qb3 32.Rb3 ed4 33.ed4 Rd8 34.Rd3 Kf7 35.f4 Ke6 36.Kf2 Kd5 37.Ke3 Rc8 38.h3 Ra8 39.g4 Ra4 40.f5 Rc4 41.h4 h6 42.Kf4 Rb4 43.c6 Kc6 44.Ke4 Kd6 45.Rc3 Rb1 46.Rc5 Re1 47.Kd3 Rg1+= 48.Kc4 Rg4 49.Rd5 Kc6 50.Rc5 Kd6 51.Rd5 Ke7 52.Kc5 Rh4 53.Rd6 Rd4?? 54.Rd4 h5 55.Kc6 Kf7 56.Rd7 Kg8 57.Kd6 Kh7 58.Ke6 h4 59.Kf7 Kh6 60.Kf8 Kg5 61.Rg7 Kf5 62.Rh7 h3? (63.Rh3 Ke4+–; better is 62...Kg4+–). TONDA – shooin, Live Game Caissa's Web, 2006.

8.a3 Be7 9.Nc3 0–0 10.Nd4 Bg6 11.f4 c5 12.bc5 Nc5 13.f5 (13.d3 Nfd7 14.f5 Bg5 15.Ne6 fe6 16.fg6 Be3 17.Kh1 hg6=) 13...ef5 14.Nf5 Bf5 15.Rf5 Nd3 16.Qc2 Nb2 17.Qb2 Qd7 (17...Rc8 18.Bb3=) 18.Raf1 (18.Nd5 Rac8 19.Rg5 Kh8 (19...Rc4?? 20.Qf6 Bf6 21.Nf6 Kh8 22.Nd7+–) 20.Ne7 Qe7=) 18...Rac8= 19.d3 Rc5 20.R5f3 a6 21.a4 b5 (21...Kh8!?=) 22.ab5+/– ab5 23.Bb5 (23.Nb5 Rb8 24.Qd4 A) 24...Rcb5?? 25.Qd7 Nd7 26.Rf7+–; B) worse is 24...Rbb5 25.Qd7 Nd7 26.Rf7 Rc4 27.Re7+– (27.dc4?! Re5+=); C) 24...Qc6+/–) 23...Qb7 (23...Qc7 24.Bc4=) 24.Rf5 (24.Rb1!?+=) 24...Rfc8= 25.Rc5 Rc5 26.Rb1 Nd5 (better is 26...Ng4!? 27.Qe2 Bg5=) 27.Nd5+/– Qd5 28.Bc4 Qd8 29.Qf2 (29.Qb3 Rf5+/–) 29...Bf6 30.Qf4 Rc8 (better is 30...Rc7!?+/–) 31.Rb7+– 1–0. Hros,Roman (1935) – Pricopie,Stefan (1615), European Youth Chess Championship U16, 2012.

8.a3 Bd6

9.d4 0–0 10.0–0=+.

9.d4 Qc7 10.0–0= 0–0 (10...Nb6 11.Bd3=) 11.Nbd2 (11.Nc3 Rad8=) 11...Nb6 12.Be2 Rfd8 (12...a5 13.b5=) 13.Rc1 a6 (13...Rac8 14.Ne5=) 14.h3 (14.Ne5 Ne4 15.Ne4 Be4=) 14...h6 15.Qb3 a5 16.b5 a4 17.Qa2 Ne4 (17...Nbd5 18.Nc4=) 18.Qa1 (18.bc6 bc6 19.Bb5 c5=) 18...Nd5 (18...Qd7 19.bc6 bc6 20.Rfd1=) 19.Ne4 Be4 20.Rfd1 (20.Nd2 Bg6=) 20...Rab8 21.Nd2 Bg6 22.Nc4 cb5 (22...Be4 23.Nd6 Qd6 24.f3+=) 23.Nd6 Qd6 24.Bb5 Be4 (24...Ra8 25.Rc5+=) 25.Ba4+/– Bg2?? (better is 25...b5 26.Bc2 Bc2 27.Rc2 Ra8+/–) 26.Kg2+– Qa6 27.Bb3?? (27.Bc2 Qe2 28.Bd3+–) 27...Ne3= 28.fe3 Qe2 29.Kh1 Qf3 30.Kh2 ½–½. Mehlhorn,U – Ihlenfeld,E, BFM–200, 2001.

9.Nc3 0–0

10.0–0 b5 11.Be2 +=.

10.0–0 Ne5 11.Ne5= Be5 12.f4 Bc7 13.Qe2? (better is 13.b5!?=) 13...b5–/+ 14.Ba2 (14.Nb5 cb5 15.Bb5 Bg4–/+) 14...Bd3–+ 15.Qf2 Bf1 16.Rf1 a5 17.Qg3? (17.Bb1 ab4 18.ab4 Qe7–+) 17...g6 (better is 17...ab4!? 18.Ne4 Ne8 19.Rc1 ba3 20.Ba1–+) 18.d4 Nd5 (18...ab4!? 19.ab4 Qd6 20.Rb1–+) 19.Bd5 (19.ba5 f5–/+) 19...ed5–+ (19...cd5?! 20.Nb5 ab4 21.ab4–/+) 20.Qe1 Re8 21.Nd1 Qd7 22.Qc3 Bd6 23.h3 ab4 24.ab4 Ra4 25.Qe1 Bb4 26.Qg3 Qf5 27.Nf2 Ra2 28.Bc1 Ba3 29.Ng4?? Kg7 30.e4 Qe4 31.Ba3 Qd4 32.Kh1 Ree2?? 33.Qh4?? Ra3–+ 34.f5 h5 35.fg6 fg6 36.Qd8?? hg4 37.Qf8 (37.Qf8 Kh7 38.Rf7 Qg7 39.Qg7#) 1–0. Gross,Wilhelm – Merten,Rainer, xiv/21, 1988.

10.0–0 Bg4 11.d4 A) 11...Nb6 12.Bd3 Nbd5 13.h3 Bh5 14.Rc1 a5 15.Nd5 Nd5 16.b5 Qb6 17.Qe2 f5; B) 11...Bf5 B1) 12.Rc1 Nb6 (12...Qe7 13.Qe2 Nb6 14.Bb3 Nbd5 15.Nd5 ed5 16.b5 Rac8 17.a4 Bg4; 12...h6 13.Bd3 Bd3 14.Qd3 Qb6 15.Nd2 Qc7 16.f4 Nb6 17.Rf3 Rfd8; 12...Re8 13.Bd3 Bd3 14.Qd3 Qe7 15.e4 e5 16.Rfd1 a5 17.b5 Ba3) 13.Bd3 Bd3 14.Qd3 a5 15.b5 c5 16.Qe2 cd4 17.Nd4 Rc8; B2) 12.h3 Nb6 (12...Nd5 13.Bd3 N7f6 14.Rc1 a5 15.Nd5 cd5 16.b5 Bd3 17.Qd3 Qe7) 13.Bd3 Nbd5 14.Rc1 Bd3 15.Qd3 a5 16.b5 Qb6 17.bc6 bc6; B3) 12.g3 Nb6 (12...h6 13.Bd3 Bg4 14.e4 e5 15.Be2 Qe7 16.Nh4 Bh3 17.Re1 a5; 12...Qb6 13.Qe2 a5 14.b5 Bg4 15.Rfc1 Rfc8 16.Bd3 c5 17.Na4 Qd8; 12...Nd5 13.Bd3 N7f6 14.Nd5 Bd3 15.Qd3 cd5 16.Ne5 Qe7 17.Rac1 h6; 12...g6 13.Qe2 Nb6 14.Bd3 a5 15.b5 Bd3 16.Qd3 c5 17.Rfd1 c4; 12...a5 13.b5 c5 14.Bd3 Bd3 15.Qd3 Qc7 16.Nd2 cd4 17.ed4 Nb6) 13.Bd3 a5 14.b5 Nbd5 15.bc6 bc6 16.Rb1 Rb8 17.Qc2 Bd3; B4) 12.Re1 Nb6 (12...Ne4 13.Ne4 Be4 14.g3 Nb6 15.Bd3 Bd3 16.Qd3 Na4 17.Bc1 Qb6) 13.Bd3 Bd3 14.Qd3 Nfd5 15.Rec1 Qd7 16.Ne4 Na4 17.Rab1 Bc7; B5) 12.Qe2 Nb6 13.Bb3 Nbd5 14.Nd5 ed5 15.Ne5 Qb6 16.Ba4 Rfe8 17.f3 Nh5; B6) 12.Bd3 Bd3 (12...a5 13.e4 Bg4 14.e5 Bf3 15.gf3 Ne5 16.de5 Be5 17.Qe2 ab4) 13.Qd3 a5 14.b5 cb5 15.Qb5 Qb6 16.a4 Rfc8 17.Rfc1 Nd5; C) 11...h6 C1) 12.Bd3 a5 (12...e5 13.h3 ed4 14.ed4 Be6 15.Re1 Qc7 16.b5 Rfe8 17.bc6 bc6) 13.b5 c5 14.h3 cd4 15.ed4 Bh5 16.Re1 Re8 17.g4 Bg6; C2) 12.Rc1 Nb6 (12...Bf5 13.Bd3 Bd3 14.Qd3 a5 15.b5 Rc8 16.h3 Qe7 17.bc6 Rc6; 12...Nd5 13.Ne4 Bc7 14.Bd3 Qe7 15.h3 Bf5 16.Qb3 a6 17.Rfe1 Rad8) 13.Bd3 Nbd5 14.h3 Bh5 15.Qe2 Nc3 16.Bc3 Nd5 17.e4 Nf4; C3) 12.e4 e5 (12...Nb6 13.Bd3 Be7 14.Re1 Bh5 15.h3 a5 16.b5 c5 17.dc5 Bc5) 13.Be2 Re8 14.g3 Qe7 15.Re1 Rad8 16.d5 Nb6 17.dc6 Bb4; D) 11...Qb6 D1) 12.Rc1 a5 (12...Bh5 13.h3 Rfc8 14.Qb3 Bf3 15.gf3 Nd5 16.Ne4 Be7 17.Kg2 a5; 12...Rfc8 13.h3 Bh5 14.Bd3 h6 15.Na4 Qc7 16.Qe2 Nd5 17.Nc3 N7f6; 12...h6 13.Qe2 Bh5 14.h3 e5 15.g4 Bg6 16.Rfd1 e4 17.Nh4 Bh7; 12...Nd5 13.Ne4 Be7 14.h3 Bf3 15.Qf3 Rfd8 16.Nc3 a5 17.Na4 Qc7) 13.b5 Rfc8 14.Bd3 cb5 15.Nb5 Rc1 16.Qc1 Bf5 17.Qd2 Bd3; D2) 12.h3 Bh5 13.Qe2 a5 14.b5 c5 15.Na4 Qc7 16.Bd3 cd4 17.Rfc1 Qd8; E) 11...Nd5 E1) 12.e4 N7b6 (12...Nf4 13.Bc1 Nb6 14.Bb3 Bc7 15.h3 Bh5 16.Bf4 Bf4 17.g3 Bd6) 13.Bb3 Nf4 14.h3 Bh5 15.Bc1 Bb8 16.Bf4 Bf4 17.g3 Bd6; E2) 12.Ne4 Bc7 (12...Bb8 13.h3 Bf5 14.Bd3 Bc7 15.Qb3 N5f6 16.Nfd2 a6 17.Rac1 h6) 13.h3 Bf5 14.Bd3 Qe7 15.Qb3 a6 16.Rac1 h6 17.Rfe1 Rfe8; F) 11...Qe7 12.h3 Bh5 (12...Bf5 13.Bd3 Bd3 14.Qd3 e5 15.Nd2 ed4 16.ed4 Rfe8 17.Nf3 Nb6) 13.Be2 a5 14.b5 c5 15.a4 Rfd8 16.Rc1 cd4 17.Nd4 Bg6; G) 11...Qc7 12.h3 Bf5 (12...Bf3 13.Qf3 a5 14.b5 c5 15.Be2 Bh2 16.Kh1 cd4 17.ed4 Bf4; 12...Bh5 13.e4 e5 14.Be2 Bf3 15.Bf3 ed4 16.Qd4 Rfd8 17.Rfd1 Ne5) 13.Rc1 a5 14.b5 c5 15.Qe2 Rac8 16.Na4 Rfd8 17.Rfd1 Ne4; H) 11...a5 12.b5 Nb6 (12...c5 13.h3 Bh5 14.Be2 Qc7 15.Rc1 Rfd8 16.Nd2 cd4 17.Nce4 Be2) 13.Bd3 Nbd5 14.h3 Bf5 15.bc6 bc6 16.Rb1 Rb8 17.Qc2 Bd3.

10.0–0 Bg4 11.Be2 Rc8 (11...a5 12.b5 Re8 (12...Qc7 13.h3 Bf5 14.Nh4 Nc5 15.Nf5 ef5 16.Qc2 Rfd8 17.bc6 bc6; 12...Nc5 13.d4 Nce4 14.bc6 bc6 15.Qc2 Nc3 16.Bc3 Qc7 17.h3 Bf5; 12...Rb8 13.h3 Bh5 14.d4 Nd5 15.Ne4 Be7 16.bc6 bc6 17.Qc2 N7f6) 13.h3 Bf5 14.bc6 bc6 15.Nd4 Qc7 16.Nf5 ef5 17.Qc2 Rab8) 12.h3 Bh5 13.d4 Nd5 (13...Nb6 14.e4 Bf3 15.Bf3 Nc4 16.Bc1 e5 17.Qd3 ed4) 14.Rc1 (14.Ne4 Be7 15.Qa4 Qc7 16.Rac1 f5 17.Nc3 N7b6) 14...Qe7 (14...N7f6 15.Ne5 Be2 16.Qe2 a5 17.Nd5 Nd5) 15.Qd2 (15.Ne4 Bc7 16.Qa4 f5 17.Nc5 Nc5) 15...N7f6 (15...Nc3 16.Qc3 Nf6 17.Qc2 Nd5) 16.Rfe1 (16.Qe1 Rfd8= (16...Nc3 17.Bc3 Nd5) 17.Nd2 Be2; 16.Ne5 Nc3 17.Bh5 Na2) 16...a5 (16...Rfd8!?= 17.Qc2 Nc3; 16...Nc3 17.Bc3 Ne4) 17.ba5+= Ba3 18.Ba3 Qa3 19.Nd5 cd5 20.Ra1 Qe7 21.Qb2 Rc7 22.Rec1 Rfc8 23.Rc7 Qc7 24.g4 Bg6 25.Ne5 Ne8 26.Ng6 hg6 27.a6 ½–½. Holz auf der Heide – Poschmann,R, Leipzig, 1999.

5.Be2 e5

6.Ne5 Bb4 7.Nd7 Bd7 8.0–0 =.

6.Ne5 Bb4 7.Nd7 Bd7 8.c4 =.

5.Be2 e6

6.a3 c5 7.b5 Bd6 8.0–0 Qc7 9.c4 Rc8 10.cd5 ed5 11.Nc3 c4 12.Qa4 b6 13.Qd1 Ne5 14.Ne5 Be5 15.f4 Bd6 16.Na4 Qe7 17.g4 Bd7 18.g5 Ne4 19.Bg7 Rg8 20.Bh6 f6 21.Bh5 Kd8 22.d3 fg5 23.de4 gf4 24.Kh1 Qe4 25.Bf3 Qe3 26.Qd5 Bc7 27.Qg8 1–0. Machete99 – guest463, ICC, 2002.

6.a3 h6 7.d4 Be7 8.0–0 c6 9.c4 Qc7 10.h3 Ne4 11.Nbd2 Ndf6 12.Rc1 a6 13.Ne4 Ne4 14.Nd2 Ng5 15.Nf3 Ne4 16.Nd2 Ng5 17.Nf3 Ne4 18.Nd2 ½–½. Wouters,Ton – Otte,Marco, Wag.Ext.4vsHetKasteel2, 1999.

6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.Be2 g6

6.0–0 Bg7 7.c4 dc4 8.Bc4 0–0 9.a3 a6 10.Nc3 Ne4 11.Ne4 (11.d4 Nd6 12.Bd3 e5 13.Bf5 Nf5 14.de5 Ne5 15.Ne5 Be5=) 11...Bb2 (worse is 11...Be4 12.Bg7 Kg7 13.d3 Bf3 14.Qf3+= (worse is 14.gf3 e5+=)) 12.Ra2 Bg7 (12...Nb6 A) worse is 13.Rb2 Nc4 (13...Be4?! 14.d3+=) 14.Rc2 Na3–/+ (worse is 14...Be4 15.Rc4 Bc6 16.Rd4+=); B) 13.d3 Nc4 14.dc4 Ba3 15.Nf6 ef6 16.Ra3+=) 13.Ng3= Be6? (better is 13...Bg4!? 14.d4 e5=) 14.Be6+/– fe6 15.d4 (15.Qb3 h6+/–) 15...b5 (15...Nf6 16.Qc2+/–) 16.Rc2 Nb6 (better is 16...Bf6+/–) 17.Nd2 (17.Ng5!? Qc8+–) 17...Nd5 (17...e5!?+=) 18.Qg4+/– Qd7 (18...Qc8 19.e4 Nf4 20.Nf3+/–) 19.Nge4 Nf6 20.Qe2 (better is 20.Nc5!? Ng4 21.Nd7+–) 20...Ne4+= 21.Ne4 Rac8 (21...e5 22.Nc5 Qc6 23.Rfc1+/–) 22.Rfc1 c6 23.Nc5 Qd6 24.Rc3 e5+/– 25.de5 Be5? 26.Rd3+– Qb8 27.g3 Rfd8+/– 28.Qa2 Kh8 29.Rcd1 Bd6? 30.Ne6 Rd7 31.Qb2?? Be5+/– 32.Qe5?? Qe5–+ 33.Rd7 Qe6 34.R1d3 Rf8 35.Kg2 Qf5 36.f4 g5 37.R7d4 g4 38.e4 Qf6 39.Kf2 e5 40.Rd6 Qf7 41.f5 Qa2 42.Rd2 Qa3 43.Rc6 Qf3 44.Ke1 Qe4 45.Kd1 Qc6 46.Ke2 Qc4 47.Kd1 Qf1 48.Kc2 Rc8 49.Kb2 Qc1 50.Kb3 Qd2 51.f6 Rc3 0–1. Fournier,Frederic (1935) – cipri4 (1840), Active (5/0), 2004.

6.Nd4 c5 7.bc5+/– Nc5 (7...e6 8.Nf5 gf5 9.d4+/–) 8.Nf5+– gf5 9.Bb5 Ncd7 10.Bf6 ef6 11.0–0 Qb6 12.Bd7 Kd7 13.Nc3 Qc6 14.Qf3 Rg8 (better is 14...Ke6+–) 15.Nd5 Kd6 16.c4 b5 (16...Qc4 17.Nf6 Rg7+–) 17.Qf4 (17...Kd7 18.Qf5 Kd8 19.cb5+–) 1–0. pierre – bdschwanke82, internet, 2007.

6.Nd4 Rg8!? +=.

5.Be2 h6

6.a3 e6 7.0–0 Bd6 8.Nd4 Bh7 9.f4 c6 10.d3 Qb6 11.c4 (11.Nc3 0–0–0=) 11...e5=+ 12.fe5 Be5 13.Qd2 c5 (13...dc4 14.dc4 Ne4 15.Qc1=+) 14.Nf5 (14.bc5!? Nc5 15.cd5=) 14...Bb2–/+ 15.Qb2 0–0 (15...Bf5 16.Rf5 cb4 17.ab4 Qe3 18.Kh1–/+) 16.cd5 (16.Ne7 Kh8 17.Nd5 Nd5 18.cd5 cb4=) 16...cb4 17.Qb4 Nd5 18.Qb6 N7b6 19.e4 Rfe8 20.Nd6 Re7 21.Ra2 Nf6 (21...Rd7 22.Nb5 (< 22.ed5 Rd6 23.Nc3 Rc8–/+) 22...Ne3 23.Rc1+=) 22.Nf5 Rd7 (22...Bf5!? 23.Rf5 Rc8=) 23.Nh6+/– Kh8 (23...gh6 24.Rf6) 24.Nf5 Rc8 25.e5 Nfd5 (25...Bf5 26.Rf5 (26.ef6?! Bd3 27.Bd3 Rd3=) 26...Nfd5 27.Kf2+/–) 26.Nd6 Rcc7 27.Nb5 Ne3 28.Re1 (28.e6 Re7 29.ef7 Rf7 30.Rf7 Rf7 31.Na7 Nbd5+–) 28...Rc2 (28...Rc5!? 29.d4 Rc2 30.Rc2 Nc2+/–) 29.Rc2+/– Nc2 30.Rc1 Bd3 31.Bd3 Rd3 32.Rc2 Rd1 33.Kf2 Rb1 34.Na7 (34.Nd6 f6 35.e6 Nd5+–) 34...Kh7? (34...Nd7 35.Re2+=) 35.Rc3 (35.Rc7 Rb2 36.Kf3 Rb3 37.Ke4 Ra3+/–) 35...g6? (35...Rb2 36.Kg3+=) 36.h3 (better is 36.Rc7!? Rb2 37.Kf1+–) 36...Kg7+/– 37.Kf3 Nd5 38.Rd3 Rf1 39.Ke4 Nf4 40.Rf3 Rf3 41.Kf3 g5 42.Nb5 f5 (42...Kg6 43.Nd6 b6 44.h4+/–) 43.ef6 Kf6 44.a4 (44.Nd6 b6+–) 44...b6 45.Nc3 (better is 45.h4+–) 45...Ne6? (better is 45...Kf5+/–) 46.Nd5+– Kf5 47.Nb6 Nd4 48.Kf2 Nb3 49.Nc4 Ke4 50.a5 Kd4 (50...Kd5+–) 51.a6 Kc4 52.a7 (52...g4 53.h4+–) 1–0. Otte,Marco – Buil,Frits, Wag.Ext.4vsMillingen1, 2000.

6.c4 dc4=+ 7.Bc4 e6 8.a3 Be7 9.0–0 9...0–0 10.d4 Nb6 11.Bd3 Bg4 12.Be2 Ne4 13.Nbd2 Nd2 14.Nd2 Be2 15.Qe2 Na4 16.Nf3 c6 17.Rac1 Nb2 18.Qb2 Qd5 19.Qc3 Rfd8 20.Rfe1 a5 21.ba5 Ra5 22.e4= Qb5 23.Rb1+= Qa6 24.Rb7 Ra3 25.Qb2 Ra2 26.Qb3 Bf8 27.Rb6 Qa5 28.Rc6 Rd4= 29.Qb1 Rb4=+ 30.Qd3 Qa7 31.Rf1 Rbb2 32.Rc8= Qb6 33.Ne5 Rf2–+ 34.Kh1 Rg2 35.Rf8? Kf8 36.Rf7 Kg8 37.Nf3 Qg1! 38.Ng1 Rh2# 0–1. Murrell,Mal – Santrac,Branko, Wyong Shire Cup, 2005.

4.Nf3 h6

5.a3 Qd6 6.c4 e6 7.cd5 ed5 8.Nc3 a6 9.d4 Be7 10.Bd3 Bd3 11.Qd3 0–0 12.0–0 Nc6 13.Rac1 Ng4 14.h3 Nf6 15.Na4 b5 16.Nc5 Qd8 17.Rc2 a5 (17...Qe8 18.Rfc1 Nd8 19.e4+=) 18.Bc3 (better is 18.Qb5!? Qe8 19.Nb7 ab4 20.Rc6 (worse is 20.Qc6 Qc6 21.Rc6 ba3 22.Ba3 Ra3+/–) 20...ba3 21.Ba1+–) 18...ab4 19.ab4 Re8 20.Rfc1 (20.Qb5 Bc5 21.dc5 Re6+/–) 20...Bd6 (20...Qb8!?+=) 21.Qb5+/– Na7 22.Qd3 Bc5 23.bc5 Nc6 24.Qb5 Ne7 25.Ne5 Nf5 26.Ra1 Rb8 27.Qd3 Nh4? (better is 27...Ne7+/–) 28.Nc6+– Qc8 29.Nb8 Qb8 30.Rb2 (30.Rb2 Qd8 31.Ba5+–) 1–0. Fournier,Frederic (1860) – walterlive2003, Active (5/1), 2005.

5.a3 Nbd7 6.d4 e6 7.c4 Nb6 8.c5 Nbd7 9.Bd3 Bd3 10.Qd3 Ne4 11.Nc3 Ng5 12.Qe2 Be7 13.0–0 0–0 14.Ne5 Ne5 15.de5 c6 16.f4 Nh7 17.Rad1 Qc7 18.e4 Rfd8 19.ed5 ed5 20.Qg4 b6 21.cb6 ab6 22.f5 Qe5 (22...Bg5!? 23.Rfe1 b5+=) 23.Nd5 Qb2 24.Ne7 Kf8 25.Nc6 Rd1 26.Rd1 Qa3 27.Qd4 Nf6 28.Qb6 Kg8 29.Qd4 Re8 30.Qd3 Qb2 31.Qd2 Qb3 32.Rc1 Ne4 33.Qd4 Qa2 34.Re1 Nf6 35.Re8 Ne8 36.h3 Nf6 37.Qd8 Kh7 38.Qd3 Qb2 39.b5 Qa1 40.Kh2 Qe1? (better is 40...Qa4+–) 41.b6 Ne4 (41...Qh4 42.Qf3 Nd7+–) 42.f6! (42.f6 g6 43.Qb3+–) 1–0. Fournier,Frederic (1970) – Orlov,Yurij B (1760), ChessOK.com, 2013.

5.c4 dc4 6.Bc4 e6 7.Nd4 Bb4?? (better is 7...Bg6 8.0–0 Bd6=) 8.Qa4+– Nc6 (8...Nbd7 9.Nf5 (9.Qb4?! c5 10.Qa3 cd4=) 9...Bf8 10.Ng3+–) 9.Nc6 bc6 10.Qb4 Rb8 11.Qc3 0–0 12.0–0 Ne4 13.Qg7# 1–0. pierre – imdujan, internet, 2009.

5.c4 e5 6.Ne5 Bd6 7.c5 Be5 8.Be5 +/–.

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

5.Bd3 Bd3 6.cd3 Nbd7 7.0–0 e6 8.b5 a6 9.ba6 Ra6 10.Qb3 Rb6 11.Qc2 Bd6 12.a4 0–0 13.Nc3 Ra6 14.Nb5 Qe7 15.Nd6 (15.Nc7 Rc8 16.Nd5 Rc2 17.Ne7 Be7–/+) 15...Qd6 16.Rfc1 Rc6 17.Bc3 e5 18.Rab1 b6 19.d4 Ng4 20.Ne5 Nge5 21.de5 Ne5 22.Be5 Rc2 23.Bd6 Rc1 24.Rc1 cd6 25.Rc6 Ra8 26.Kf1 Ra4 27.Rb6 d4 28.Rd6 de3 29.de3 Kh7 30.Ke2 Re4 31.Kf3 Re6 32.Re6+– fe6 33.Kf4 Kg6 34.Ke5 Kf7 35.Kd6 Kf6 36.e4 g5 37.g4 Kf7 38.e5 (38...Kf8 39.Ke6+–) 1–0. Klaus Behrmann (2420) – SteVeYBoY, ChessWorld.net, 2003.

5.Nd4 Be4 =.

5.Be2 Nbd7 6.0–0 e6 7.b5 Bd6 8.d3 0–0 9.Nbd2 e5 10.c4 Re8 (10...c6 11.d4 e4 12.Nh4=) 11.a4 (11.cd5!? Bg4 12.h3+/–) 11...c6= 12.a5 Nc5 13.Nb3 (13.d4 ed4 14.Nd4+= (worse is 14.ed4 Nd3 15.Bd3 Bd3–/+; 14.Bd4?! Rc8=)) 13...Qc7 (13...Nd3 14.Bd3 Bd3 15.Qd3+=) 14.g3?? (14.Nc5!? Bc5 15.Be5+–) 14...Rad8 (14...dc4!? 15.dc4 Nfe4+=) 15.Nc5= Bc5 16.d4?? (better is 16.Be5 Re5 17.Ne5 Qe5 18.d4+/–) 16...dc4–/+ 17.Bc4 Bg4 18.Be2 Bh3 19.Re1 Bb4–/+ 20.Nd2 ed4 21.Bd4 Nd5 22.a6? c5–+ 23.Rc1 ba6 24.ba6 Qa5?? 25.Ra1?? Qc7 26.Bb2?? Nc3 27.Qc2 Ne2 28.Re2 Qc6 29.e4 Bd2 30.Rd2 Rd2 31.Qd2 Qe4 32.f4 Qf3 33.Qf2 Qd3 34.Qc5 Re2 35.Qd4–/+ Rg2 36.Kh1 Qf5 1–0. Starr,Albert Martin – Litowsky,Daniel (1715), San Francisco Chernev Memorial, 2008.

5.Be2 g5 6.Bf6 ef6 7.a3 Bg7 8.0–0 Bg6 9.Nc3 h5 10.d4 h4 11.Na4 Nd7 12.c4 dc4 13.Bc4 g4 14.Nd2 f5 15.Nc5 Nc5 16.bc5 Qg5 (16...h3!? 17.g3 0–0+=) 17.Qb3 g3? (better is 17...0–0!? 18.Qb7 f4+/–) 18.Qb7+– gf2 19.Kf2 0–0 20.Nf3 (20.Qc7 Bd4 21.Rfe1 Rfc8+=) 20...Qe7 21.Rae1 Rfb8 22.Qc6 Rb2?? (22...Bh5 23.Kg1 h3+–) 23.Kg1 Rab8 24.Qg6 Rc2 25.Bd5 Rd8 (25...h3 26.gh3 Qd7 27.Rb1+–) 26.Qf5 1–0. Yannick – DANTONIFAYARD, playchess.de, 2005.

5.Bf6 ef6 6.Nd4 Bd7 7.Nc3 c6 8.a3 b5 (8...a5 9.b5=) 9.Qe2 (9.a4!?+=) 9...a5=+ 10.e4 (10.ba5 Bd6=) 10...de4 11.Ne4 Be6 (11...Be7 12.ba5 0–0=+ (< 12...Ra5 13.Nd6 Kf8 14.Nb7+/–; < 12...Qa5 13.Nd6 Kf8 14.N4f5 Bf5 15.Nf5=)) 12.Ne6= fe6 13.Qg4 (13.Rb1 Kf7=) 13...Kf7 (13...ab4 14.Qe6 Be7 15.a4=+) 14.Rb1–/+ Qd4?? (better is 14...f5 15.Qf3 Qd5–/+) 15.Ng5!!+– (15.Ng5 hg5 16.Qd4 ab4 17.Qd8+–) 1–0. marus1 – gbs25, internet, 2001.

5.c4 c6

6.a3 e6 7.Be2 Bd6 8.0–0 Qc7 (8...dc4 9.Bc4 b5 10.Be2=) 9.g3 (9.c5 Be7+=) 9...0–0 (9...dc4 10.Bc4 Nbd7 11.d3+=) 10.d3 (10.Bf6 gf6 11.c5 Be7+=) 10...Bh3 11.Re1 Re8 (11...Nbd7 12.Nc3=) 12.c5 Be7 13.Qc2 Nbd7 14.Bf1 (14.Nbd2 b6=) 14...Bf1+= 15.Rf1 Ng4 (15...b6 16.cb6 ab6 17.Rc1+=) 16.Nbd2= f6 (better is 16...e5!?=) 17.e4+/– de4 18.de4 Rad8 19.Rad1 Nde5? (19...Nge5 20.Nd4 Nf8 21.f4+=) 20.Qb3 (better is 20.Nd4!? Rd4 21.Bd4+–) 20...Nf3+/– 21.Nf3 Bf8 22.Rd8 Rd8?? (22...Qd8 23.h3 Ne5 24.Ne5 fe5 25.Be5 b6+–) 23.h3 (better is 23.Qe6 Qf7 24.Qg4+–) 23...Ne5 24.Ne5 fe5 25.Qe6 Qf7 26.Qf7 Kf7 27.Be5 Re8 28.f4 b6 29.Re1 bc5+/– 30.bc5 Bc5 31.Kg2 Ba3 32.Bc3 c5?? 33.e5?? Bb4= 34.Bb4 cb4 35.Rd1 Ke7 36.Rc1 Kd7 37.Rd1 Kc6 38.Rc1 Kb5 39.Kf2 a5 40.Rc7 a4 41.Rb7 Kc4 42.Rc7 Kb3–+ 0–1. Valpa – Adamant, playchess.de, 2002.

6.Nc3 e6 (6...Na6 7.a3 (7.Qb3 e5 8.cd5 Nb4 9.Rc1 Qd6 10.Be2 Be7) 7...Nc7 8.Be2 a5 9.0–0 ab4 10.ab4 Ra1; 6...Nbd7 7.cd5 (7.Qb3 e6 8.Nd4 Bg6 9.cd5 cd5 10.Be2 Qb6) 7...cd5 8.Nd4 Bg6 9.Qb3 e6 10.Rc1 Rc8) 7.cd5 (7.Nd4 Bb4 8.cd5 Bc3 9.Bc3 Qd5 10.f3 Bg6) 7...cd5 8.Bb5 (8.Nd4 Bh7+= (8...Nc6 9.Nf5 ef5 10.b5 Ne5) 9.Rc1 Be7 10.Ncb5 Na6) 8...Nbd7= 9.a3 (9.Qb3 a6 10.Be2 Qb6) 9...a6 10.Be2 Bd6 11.Nd4 Bg6 12.f4 0–0 13.0–0 Rc8 14.f5 ef5 15.Nf5 Bb8 16.Qb3 Ne5 17.Rac1 (better is 17.d4 Nc4 18.Nd5 Nd5 19.Bc4–/+) 17...Nc4?? (better is 17...b5+=) 18.Nd5!+– Nd2 (18...Qd5 19.Ne7 (19.Rc4; 19.Ne7; 19.Rc4); 18...Nd5 19.Rc4 (19.Rc4)) 19.Rc8 Nb3 20.Rd8 Rd8 21.Bf6 (better is 21.Nf6 gf6 22.Bf6+– (22.Nh6?! Kh7 23.Rd1 Rc8=)) 21...gf6+/– 22.Nf6 Kf8 23.Nh6 Ba7 (23...Nd2 24.Rc1+/–) 24.Kf2+– Kg7 25.Nhg4 Rd2 (25...Nd2!? 26.Rd1 Bc2 27.Nh5 Kg6+–) 26.Rd1+– a5 27.Ne8 Kf8 28.Nd6 b6? 29.Rd2 Nd2 30.Nc8 Bb8 31.Nb6 Bd6? 32.b5 f5 33.Nf6 Kg7 1–0. Sotelo,Juan (1975) – Kuenitz,Klaus (1640), Caleta ENG, 2013.

6.Nd4 Be4 7.f3 e5 8.fe4 ed4 9.ed5 de3 +=.

6.Be2 e6 7.Qb3 Be7 8.0–0 Nbd7 9.Nc3 Nf8 (9...a5 10.a3=) 10.b5 Ng6 11.Nd4 dc4 12.Bc4 c5?? (better is 12...Ne5 13.Nf5 ef5+/–) 13.Nf5+– ef5 (13...0–0 14.Ne7 Qe7+–) 14.Bf7 Kf8 (14...Kd7 15.Bg6 f4+–) 15.Bg6 (15.Bg6 Qe8 16.Be8 Ke8 17.Nd5+–) 1–0. Scholbach,Tillmann (1975) – Medvedyev,Oleksandr, Leipzig VfB op, 2006.

6.Bf6 ef6 7.Be2 (7.Nd4!? Be4 8.f3=) 7...Bb4 8.0–0 (8.Nd4 Be4 9.0–0 dc4 10.Bc4 0–0–/+) 8...0–0 (8...dc4 9.Bc4 Bd3 10.Qb3 Bf1 11.Bf7 Kf8 12.Kf1–/+) 9.d4 (9.Qb3 Qd6–/+) 9...Be6 (9...dc4 10.Bc4 Re8 11.Bf7 Kf7 12.Qb3 Be6 13.Qb4=) 10.a3=+ Ba5 (10...Qa5 11.Qb3 Na6 12.Qb2+/–) 11.Nbd2 Bd2 (11...Re8=+) 12.Qd2 (12.Nd2!? dc4 13.Bc4=+) 12...dc4–/+ 13.Qb4 (13.Qc3 b5–/+) 13...b5 14.a4 (14.Rfc1 Re8–/+) 14...a5–+ 15.Qb1 b4 16.Qd1 (16.Rc1 c3–+) 16...c3 (16...Nd7 17.Rc1 Nb6 18.Nd2–+) 17.Bd3 (17.Rb1 Nd7–+) 17...Nd7 18.Bb1 (18.Qc2 Rb8–+) 18...Nb6 (18...b3 19.Qc1 c2 20.Bc2 bc2 21.Qc2–+) 19.Qe2 (19.Qc2 f5–+) 19...g6 (19...b3 20.Rc1 b2 21.Bc2–+) 20.Re1 (20.Be4 Bc4 21.Bd3 Bd3 22.Qd3 Rb8–+) 20...Nc4 (20...b3 21.Rc1 b2 22.Bc2–+) 21.e4 Na3 22.Qd3 Bc4 23.Qd1 Nb1 24.Rb1 b3 25.Qc1 c2 26.Rb2 Rb8 27.Qh6 Rb4 28.Nd2 Ra4 29.Nc4–/+ Rc4 30.Rb3 Qd4?? 31.Rh3+– (31…Qf2 32.Kf2 c1Q 33.Qh7#) 1–0. Andersson,Egart – Andersen,E, DK, 1995.

5.d4 e6

6.a3 Bd6 7.c4 c6 8.c5 Bc7 9.a4 Nbd7 10.Be2 0–0 11.0–0 Re8 12.Ne5 Ne5 13.de5 Nd7 14.f4 Qh4 15.Nd2 Bd8 (15...a5!?+=) 16.Nf3 Qe7 17.Nd4 (17.a5 Rb8+=) 17...Be4 (17...a5 18.b5 Qc5 19.Rc1=) 18.Bd3 (better is 18.a5+=) 18...Bd3–/+ 19.Qd3 f5 (19...a5!? 20.Nb3 ab4–/+) 20.Rac1 (20.a5 Nb8+=) 20...Rc8 (20...a5!? 21.b5 Nc5=) 21.Ba3 g5 22.b5 Nb8 23.g4 Qg7 24.gf5 gf4 25.Kh1 Kh8? 26.f6 Qf7 27.ef4 Rg8 28.Rg1 Bc7 29.Bb4 Rg1 30.Rg1 Rg8 31.Rg8 Qg8 32.Qg3 Qg3 33.hg3 cb5 34.ab5 Nd7 35.Ne6 1–0. Fiedler,Roland – Bauer,Matthias, Bochum–ch, 1989. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 Bf5 4.e3 h6)

6.a3 Bd6 7.c4 c6 8.c5 Bc7 9.Nc3 0–0 10.Be2 b5 11.0–0 a5 12.Ne5 Be5 13.de5 Nfd7 14.f4 Na6 15.Qd4 Qe7 (15...f6 16.e4 de4 17.Rfd1 ab4 18.ab4 Ndc5 19.Qd8 Rfd8 20.bc5 Nc5 21.g4=) 16.e4+/– Bh7 17.ed5 ed5 18.Rf3 Bf5 19.Rg3 f6 (19...Qe6!?=) 20.ef6+= Qf6? (20...Nf6 21.Bb5 ab4 (21...cb5?? 22.Nd5 Qd8 23.Nf6 Qf6 24.Qf6 Rf6 25.Bf6+–) 22.ab4 Nb4 (22...cb5 23.Nd5 Qe6 24.Nf6 Rf6 25.Qf6 Qf6 26.Bf6+–) 23.Ra8 Ra8 24.Qb4 cb5 25.Nb5 Qe2+/–) 21.Qf6?? (better is 21.Nb5 g6 22.Qd2+–) 21...Nf6= (worse is 21...Rf6 22.Nd5 cd5 23.Bb5+/–) 22.Na2 Nh5?? (better is 22...Kf7+=) 23.Bh5+– g6 (23...Ra7 24.ba5 Bh7+–) 24.Bg6 Bg6 25.Rg6 Kf7 26.Rc6 Rfe8 27.Rh6 Re2 28.Rh7 Kg6 29.Rg7 Kh6 30.Bc3 Re3 31.Rg3 Re4 32.f5 d4 33.Bd2 Kh7 34.f6 Rf8 35.Rh3 Kg8 36.Bg5 Kf7 37.Rh7 Kg6 38.Rg7 Kh5 39.h3 d3 40.g4 Rg4 41.hg4 Kg4 42.f7 Nc7 43.Be7 (43.Be7 Kf5 44.Bf8+–) 1–0. Osmak,Yulia – Erofeev,Alexandr, Stepichev Memorial, 2006.

5.Be2 e6

6.a3 Bd6 7.c4 (7.0–0 0–0=) 7...c6 (7...dc4!? 8.Bc4 a5=+) 8.c5 Bc7 9.0–0 0–0 10.d4 Nbd7 11.Nbd2 a6 12.a4 Ne4 13.b5 Re8 (13...ab5 14.ab5 Ra1 15.Ba1 cb5 16.Bb5=) 14.b6+= Bb8 15.Nb3 Bg4 16.Na5 Qc8 17.Qc2 e5 18.Rad1 ed4 19.Bd4 Ne5 20.Ne5 Be2 21.Nec6?? (better is 21.Qe2 Be5 22.Qd3=) 21...Bf3 (21...Bd1 22.Rd1 bc6–/+) 22.gf3+– Qh3 (22...Nf2 23.Qf2 bc6+–) 23.f4 (23.Nb8 Ng5 24.Be5 Re5 25.Qe2 Nf3 26.Qf3 Qf3 27.Rfe1 Rg5 28.Kf1 Rb8 29.Rd2 Qg2 30.Ke2 Qg4 31.Kf1 Qa4 32.Nb7 Qc4 33.Rde2 Rb7 34.h4–+) 23...Qg4= 24.Kh1 Qf3 25.Kg1 Qg4 ½–½. Arkell Lalic,Susan (2300) – Goldgewicht,Lionel, Cappelle op 7th, 1991.

6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Nbd7 10.0–0 Bd6 11.c4 dc4 12.Bc4 Nb6 13.Be2 0–0 (13...Qe7 14.Bf6 Qf6 15.Nc3+=) 14.Nc3 Qe7 15.Qb3 Rd8 16.d3 e5 17.Na4 (17.Bb2 Nbd7+=) 17...Nfd7 (17...Na4 18.Qa4 Qe8 19.d4+=) 18.Nb6+= Nb6 19.Nd2 Nd7 (19...Ra8 20.Ne4+=) 20.Nc4= Nc5 21.Qc2 f6 22.Rd1 b6 23.Qb2 e4 24.Nd6 Qd6 25.d4 Be6 (25...Nd3 26.Bd3 ed3 27.f3=) 26.Qc2 (better is 26.Qb1!? Nd3 27.f3+/–) 26...Bb3= 27.dc5 Qd1 (worse is 27...Bc2 28.cd6 (worse is 28.Rd6 cd6 29.cb6 Kf7+=) 28...Bd1 29.dc7+/–) 28.Bd1 Rd1 29.Qd1 Bd1 30.cb6 cb6 31.Bd4 Be2 32.Bb6 Bb5 ½–½. Jonsson,Pall G (1830) – Stray,G (2065), Reykjavik Open, 2015.

6.b5 c5 7.c4 Be7 8.0–0 0–0 9.d4 Nbd7 10.Nc3 dc4 11.Bc4 Nb6 12.Bd3 Bg4 (12...cd4 13.ed4 (13.Nd4? Bd3 14.Qd3 e5–+) 13...Bd3 14.Qd3+=) 13.h3 cd4 14.Ne4 Bf3 15.Qf3 de3 16.Rad1 ef2 17.Rf2 Nbd5 18.Nf6 Bf6 (18...gf6?? 19.Qg4 Kh8 20.Qe4 Bc5 21.Qh7 mate) 19.Qe4 g6 20.Rf6 Nf6 21.Qh4?? (better is 21.Qe5 Rc8 22.Qf6 Qf6 23.Bf6+=) 21...Nh5–+ 22.Qg4 Qg5 23.Qd4 e5! 24.Qe4 (24.Qe5 Qe5 Combination) 24...Rad8 (24...Nf4 25.Kh2–+) 25.Bc1? (25.h4 Qf4 26.Re1–+) 25...Nf4 26.Qf3 Qh5 (26...Rd7 27.Bf4 Qf4 28.Qf4 ef4 29.Kf2–+) 27.Qf1 (27.Qh5 Nh5 28.Bh6–+) 27...Nd3 28.Rd3 e4 29.Rd8 0–1. Djurisic,D (1885) – Jovicic,D (2120), Belgrade SER, Team Cup Final, 2012.

6.b5 Bd6 7.0–0 =.

6.b5 Nbd7 7.a4 (7.0–0 Bd6=) 7...Be7 (7...Bd6 8.0–0=) 8.0–0 0–0 9.c4 (9.a5 a6 10.ba6 ba6=) 9...c6 (9...dc4 10.Bc4 Nb6 11.Be2=) 10.d4 (10.bc6 bc6 11.Nd4 Bd6 12.Nf5 ef5+=) 10...c5 (10...Rc8 11.Nbd2=) 11.Ba3 (11.a5 Rc8=) 11...b6 (11...dc4 12.Bc4 Rc8 13.Nbd2=) 12.Nc3 Qc7 (12...dc4 13.Bc4 Bd6 14.Qe2=) 13.Qb3 (13.cd5!? Rac8 14.dc5 bc5 15.Nh4+/–) 13...Ne4 14.cd5 (14.Rfc1 Nc3 15.Qc3 Rfc8=) 14...Nc3 15.Qc3 ed5 16.Qc1 (16.Bd3 Bg4=) 16...Rfe8 (16...Rac8 17.dc5 bc5 18.Rd1=) 17.Rd1 (17.dc5 bc5 18.Rd1 Qd6=) 17...c4 18.Be7 Re7 19.Qa3 (19.a5 ba5 20.Qc3 Nf6=) 19...Nf6 20.Nd2 (20.Ne5 a6 21.ba6 Ra6=) 20...Rc8 (20...a6 21.Qb4=+) 21.Qc3 Be6 22.Rdc1 Ree8 23.Bf3 Ng4 24.g3 f5 25.Bg2 Qf7 26.Nf3+= Qc7 27.h3 Nf6= 28.Ne5 Ne4 29.Qe1 g5 30.Qe2 Nf6 31.g4 fg4 32.Ng4 Ng4 33.hg4 Qd7 34.Qf3 Rf8 35.Qh3 Kg7 36.f3 Rh8 37.Qg3= Qc7 38.Qc7 Rc7=+ 39.Bh3 h5–/+ 40.Rf1 hg4–+ 41.Bg4 Bg4 42.fg4 Rh4 43.Rf5 Rg4 44.Kh2 Kg6 45.Rd5 Rh7# 0–1. Larsen,Andreas – Lind,Magne, Tromsoe op–B, 1997.

4.f4 e6

5.a3 Bd6 6.Nf3 0–0 7.Be2 a5 8.b5 c6 9.Nd4 Bg6 10.0–0 Qc7 11.bc6 bc6 12.Nc3 Nbd7 13.Rb1 =.

5.b5 c5 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nd7 4.f4 e6 5.Nf3 Ngf6 6.b5 c5).

5.Nf3 Bb4 6.Be2 Nbd7 7.0–0 c6 8.Nc3 Bd6 9.Qe1 Bg6 10.Qh4 Qc7 11.Nd4–/+ 0–0–0 12.a4 e5 13.Ndb5 cb5 14.Nb5 Qb8 15.f5 e4 16.Bd4 Bc5 17.Ra3 b6 18.Rb3 Rde8 19.a5 Kd8 20.Na7 Qa7 21.ab6 Bb6?? 22.Ra1? Bd4 23.Ra7 Ba7 24.fg6 hg6 25.Qf4 Ke7 26.Qc7? Bb8 27.Qb7 Bh2 28.Kf2 Rb8 29.Qa7 Rb3 30.cb3 Bd6 31.Bb5 Rb8 32.Ba4 Ke6 33.Bc6 Rb3 34.Qd4 Rb4 35.Qc3 Rc4 36.Bd7 Kd7 37.Qa5 Rc7 38.Qa8 Ke7 39.Qh8 Be5 40.Ke2 Ne8 41.g4 Rc6 42.Qh4 Nf6 43.g5 Nh5 44.Qe1 Ng3 45.Kf2 Nf5 46.Qb1 Nd6 47.Qa2 Ke6 48.Qa8 Rc8 49.Qa4 Rh8 50.Qa7 Rh2 51.Ke1 Rh1 52.Kf2 Rh2 53.Ke1 Rg2 54.Kd1 Rg5 55.Kc2 Rg2 56.Qa6 0–1. Zessinger,Reinmar – Class,Wolfgang, Bayern–chA Krumbach, 1973.

5.a3 a5

6.ba5 A) 6...Be7 A1) 7.Be2 c5 (7...Ra5 8.Nf3 0–0 9.0–0 c6 10.Nd4 Bg6 11.f5 ef5 12.Nf5 Bf5=; 7...0–0 8.Nf3 c5 9.0–0 Bg4 10.Ne5 Be2 11.Qe2 Qa5 12.c4 dc4=; 7...Bc5 8.Nf3 0–0 9.Nd4 Bd4 10.Bd4 Ra5 11.Bc3 Ra8 12.0–0 Ne4=; 7...Nc6 8.a6 ba6 9.Nf3 Rb8 10.Ra2 a5 11.0–0 Bc5 12.Nc3 0–0=) 8.Nf3 0–0 9.0–0 Bg4 10.h3 Bf3 11.Rf3 Qa5 12.Bc3 Qb6+=; A2) 7.Nf3 Ra5 (7...0–0 8.Be2 c5 9.0–0 Bg4 10.Nc3 Qa5 11.Ne5 Be2 12.Qe2 Nbd7=) 8.Nd4 Bg4 9.Be2 Be2 10.Qe2 c5 11.Nb3 Ra6 12.0–0 Nc6+=; A3) 7.Ne2 0–0 (7...Ra5 8.Nd4 Bg4 9.Be2 Be2 10.Qe2 c5 11.Nb3 Ra6 12.0–0 Nc6+=; 7...Bg4 8.h3 Bh5 9.d3 0–0 10.g4 Bg6 11.g5 Nfd7 12.Qd2 Nc6+=; 7...Nbd7 8.Nd4 Bg4 9.Be2 Be2 10.Qe2 c5 11.Nf3 Qa5 12.Nc3 0–0+=; 7...Bg6 8.Ng3 0–0 9.Be2 Ra5 10.Bc3 Ra7 11.0–0 Qd7 12.Be5 Nc6+=) 8.Ng3 Bg4 9.Be2 Be2 10.Qe2 Ra5 11.Bc3 Ra7 12.0–0 Nbd7+=; A4) 7.Nc3 0–0 (7...Ra5 8.Nf3 0–0 9.Nd4 Ne4 10.d3 Nd6 11.Qd2 Bh4 12.g3 Bf6+=) 8.Nf3 Ra5 9.Nd4 Ne4 10.d3 Nd6 11.Qd2 Bh4 12.g3 Bf6+=; B) 6...Bd6 B1) 7.Be2 Nc6 (7...Ra5 8.Nf3 0–0 9.0–0 c6 10.Nd4 Be4 11.d3 Bg6 12.a4 c5=; 7...0–0 8.Nf3 Ra5 9.Nd4 Be4 10.0–0 c5 11.Nb3 Ra8 12.Nc3 Bg6=; 7...Nbd7 8.Nf3 Ra5 9.Nh4 Be4 10.d3 Bg6 11.g4 0–0 12.g5 Ne8+=; 7...Bc5 8.Nf3 0–0 9.Nd4 Bd4 10.Bd4 Ra5 11.Bc3 Ra8 12.0–0 Ne4=) 8.Nf3 0–0 9.Nh4 Na5 10.Nf5 ef5 11.0–0 Bc5 12.Kh1 Re8+=; B2) 7.Nc3 Bc5 (7...0–0 8.Nb5 Be7 9.Be5 c5 10.Bc7 Qd7 11.Nf3 c4 12.Rb1 Nc6=; 7...c6 8.Nf3 Qa5 9.Be2 Bg4 10.Nd4 Be2 11.Qe2 0–0 12.0–0 Nbd7+=; 7...Nbd7 8.Nf3 Ra5 9.Be2 0–0 10.Nd4 Bg6 11.0–0 c5 12.Nb3 Ra8+=; 7...Ra5 8.Nf3 0–0 9.Be2 Nc6 10.Nb5 Be7 11.0–0 Ne4 12.Nfd4 Nd4=) 8.Rb1 Ra5 9.Na4 Be7 10.Bf6 Bf6 11.Rb7 0–0 12.c3 Bh4–/+; B3) 7.Ne2 Nc6 (7...0–0 8.Nd4 Bg4 9.Be2 Be2 10.Qe2 Ra5 11.Nc3 c5 12.Nb3 Ra8=; 7...Ra5 8.Nd4 Bg4 9.Be2 Be2 10.Qe2 0–0 11.Nc3 Qe7 12.Ncb5 Nbd7+=; 7...Bg4 8.h3 Bh5 9.d3 0–0 10.g4 Bg6 11.Qd2 Nc6 12.g5 Nd7+=) 8.Nbc3 0–0 9.Nb5 Be7 10.Nbd4 Nd4 11.Nd4 Bg4 12.Be2 Be2+=; B4) 7.Nf3 Nbd7 (7...Ra5 8.Be2 0–0 9.Nd4 Be4 10.0–0 c5 11.Nb3 Ra8 12.Nc3 Bg6=; 7...0–0 8.Be2 Ra5 9.0–0 b5 10.Bc3 b4 11.ab4 Ra1 12.Ba1 Bb4=) 8.Be2 Ra5 9.Nh4 Be4 10.d3 Bg6 11.g4 0–0 12.g5 Ne8+=; C) 6...Bc5 C1) 7.Ne2 Ra5 (7...Nc6 8.Ng3 Bg4 9.Qc1 0–0 10.a6 ba6 11.Bd3 Nh5 12.Nh5 Bh5=; 7...0–0 8.Nd4 Bd4 9.Bd4 Ne4 10.Qf3 c5 11.Bb2 Qa5 12.Bd3 Qb6–/+; 7...Bg4 8.h3 Bh5 9.Rg1 Ne4 10.Qc1 Be2 11.Ke2 0–0 12.Nc3 Ng3–/+; 7...Nbd7 8.Nd4 Bd4 9.Bd4 0–0 10.Be2 c5 11.Bc3 Ne4 12.0–0 Nc3+=) 8.Nd4 Bd4 9.Bd4 Nc6 10.Bb2 d4 11.Be2 Rc5 12.c4 d3–/+; C2) 7.Be2 0–0 (7...Nc6 8.a6 ba6 9.Nc3 0–0 10.Nf3 Qe7 11.Na4 Bd6 12.Nh4 Rfb8=; 7...Ra5 8.Nf3 0–0 9.Nd4 Bd4 10.Bd4 Nc6 11.Bb2 d4 12.Bf3 Rc5+=; 7...d4 8.Bf3 c6 9.ed4 Bd4 10.Bc3 0–0 11.Ne2 Bc3 12.Nbc3 Ra5+=; 7...Ne4 8.Nf3 0–0 9.d3 Nf6 10.Nd4 Bd4 11.Bd4 Nc6 12.Bb2 Ra5=) 8.Nf3 Ra5 9.Nd4 Bd4 10.Bd4 Nc6 11.Bb2 d4 12.Bf3 Rc5+=; C3) 7.Nf3 Ra5 (7...0–0 8.Be2 Ra5 9.Nd4 Bd4 10.Bd4 Nc6 11.Bb2 d4 12.Bf3 Rc5+=) 8.Nd4 Bd4 9.Bd4 Nc6 10.Bb2 d4 11.Be2 Rc5 12.c4 d3–/+; C4) 7.Bb5 Nbd7 (7...c6 8.Be2 Qa5 9.Nf3 Nbd7 10.Nd4 Bd4 11.Bd4 0–0 12.0–0 c5+=) 8.Nf3 0–0 9.0–0 Ra5 10.Be2 Ne4 11.Nd4 Bd4 12.Bd4 c5+=.

6.b5 c5 7.Nf3= (7.Ne2 Bd6 (7...Be7 8.Ng3 Bg4 9.Be2 Be2 10.Qe2 0–0 11.0–0 Nbd7 12.Nc3 Qb6=; 7...Nbd7 8.Ng3 Bg4 9.Be2 Be2 10.Qe2 Bd6 11.0–0 0–0 12.e4 de4=; 7...a4 8.Ng3 Bg6 9.Be2 Be7 10.0–0 Qd7 11.c4 dc4 12.Bc4 Bd3=; 7...Bg6 8.Ng3 Bd6 9.Be2 Nbd7 10.0–0 Qc7 11.Nh5 Bh5 12.Bh5 e5+=) 8.Ng3 Bg6 9.Be2 Nbd7 10.0–0 Qc7 11.Nh5 Bh5 12.Bh5 e5+=; 7.Be2 d4 (7...Be7 8.Nf3 0–0 9.0–0 Ne4 10.d3 Nd6 11.c4 Bf6 12.Be5 dc4=; 7...Bd6 8.Nf3 Nfd7 9.0–0 0–0 10.Nc3 a4 11.d3 Qb6 12.e4 Bg4=; 7...Nbd7 8.Nf3 Be7 9.0–0 0–0 10.Nh4 Re8 11.Nc3 Nb6 12.Nf5 ef5=; 7...a4 8.Nf3 Be7 9.0–0 Bg4 10.h3 Bf3 11.Bf3 Qd7 12.Nc3 0–0=) 8.Bf3 Qb6 9.c4 a4 10.Ne2 Bd3 11.Qc1 Nbd7 12.ed4 Be2=) 7...Nbd7 (7...Be7 8.Be2 0–0 9.0–0 Ng4 10.h3 Nh6 11.g4 Be4 12.Nc3 Nd7=; 7...Bd6 8.Be2 Bg4 9.0–0 Nbd7 10.h3 Bf3 11.Bf3 Qb6 12.c4 e5=; 7...a4 8.Be2 Be7 9.0–0 Bg4 10.h3 Bf3 11.Bf3 Qd7 12.Nc3 0–0=) 8.c4 (8.Be2 Nb6= 9.0–0 Na4 10.Be5 Ng4 11.Ra2 Ne5 12.Ne5 f6=) 8...Bd6+= 9.cd5 ed5 10.Be2 0–0 11.0–0 h6 (11...Nb6 12.Nh4 Be6=) 12.Nc3 Bh7 (12...Nb6=) 13.d4 (13.Rc1 c4=) 13...Nb6 14.Ne5 Rc8 15.Bf3 cd4 16.ed4 Nc4 (16...Re8 17.Re1=) 17.Nc4+= Rc4 18.Nd5 Nd5 19.Bd5 Rc2 20.Bc1 Ba3 21.Qf3 (worse is 21.Ra3 Qd5 22.Rf2 Rf2 23.Kf2 Rc8–/+) 21...Bc1 (21...Bb2 22.Bb2 Rb2 23.Rad1=) 22.Rac1 Re8 23.f5 Rc1 24.Rc1 Qg5 25.Rc7+/– Re1 26.Kf2 Qd2 27.Kg3 Kh8 28.Rc8 Bg8 29.Qg4 Re3 30.Bf3 b6 31.f6 g5 32.h3 Qe1 33.Kh2+/– Re8?? 34.Qh5+– Kh7 35.Bg4 Qf2 36.Re8 Qf4 37.Kg1 Qd4 38.Kh1 Qf6 39.Be2 Kg7 40.Qf3 (40.Qf3 Qd4 41.Bd3+–) 1–0. Lapshun,Yury (2440) – Gravel,Simon (2255), Quebec Open, Montreal CAN, 2004.

6.b5 Bc5 A) 7.Nf3 0–0 (7...Nbd7 8.Be2 0–0 9.0–0 a4 10.Nc3 Nb6 11.Qc1 Qe7 12.Ne5 h6=; 7...a4 8.Be2 0–0 9.0–0 Nbd7 10.Nh4 Be4 11.Nc3 Nb6 12.f5 Qe7=; 7...c6 8.Be2 0–0 9.Nd4 Be4 10.0–0 cb5 11.Nb5 Nc6 12.N1c3 Rc8=; 7...Qe7 8.Be2 0–0 9.0–0 Nbd7 10.Nc3 Rfe8 11.Na4 Bd6 12.Nh4 Be4=) 8.Be2 c6 9.Nd4 cb5 10.Nf5 ef5 11.Bb5 d4 12.ed4 Bd4+=; B) 7.Nc3 c6 (7...Nbd7 8.Nf3 0–0 9.Be2 Ng4 10.h3 Ngf6 11.0–0 Ne4 12.Ne4 Be4=; 7...0–0 8.Nf3 Ne4 9.Ne4 de4 10.Nd4 Bg6 11.Qg4 Nd7 12.Be2 Bd6=) 8.Nf3 0–0 9.Be2 cb5 10.Nb5 Nc6 11.Rb1 Be4 12.0–0 Rc8=.

6.b5 Bd6 A) 7.Be2 Nbd7 (7...0–0 8.Nf3 Bc5 9.0–0 a4 10.Kh1 Ne4 11.Nd4 Bg6 12.d3 Nd6=; 7...c5 8.Nf3 Bg4 9.h3 Bf3 10.Bf3 c4 11.Nc3 0–0 12.Qe2 Qb6=; 7...a4 8.Nf3 Bg4 9.0–0 0–0 10.Nc3 Nbd7 11.h3 Bf3 12.Rf3 e5=; 7...Bc5 8.Nf3 0–0 9.0–0 Nbd7 10.Nd4 Bg6 11.d3 a4 12.Nd2 c6=) 8.Nf3 Bg4 9.0–0 0–0 10.Nc3 Nb6 11.d3 Bc5 12.d4 Bd6+=; B) 7.Nf3 Nbd7 (7...0–0 8.Be2 c6 9.Nd4 Be4 10.0–0 Qd7 11.Nc3 c5 12.Nf3 Bf3=; 7...c5 8.Be2 Bg4 9.0–0 0–0 10.h3 Bf3 11.Rf3 Nbd7 12.Nc3 Qc7=; 7...a4 8.Be2 Bg4 9.0–0 0–0 10.Nc3 Nbd7 11.h3 Bf3 12.Rf3 e5=; 7...Qe7 8.Be2 Bg4 9.0–0 0–0 10.Nc3 Nbd7 11.Nd4 Be2 12.Qe2 Nb6=) 8.Be2 Bc5 9.Nh4 Be4 10.Nc3 d4 11.ed4 Bd4 12.Nf3 Bc3=.

6.b5 Ne4 7.Nf3= Nd7 (7...a4 8.d3 Nf6 9.Be2 Bc5 10.Nd4 0–0 11.h4 h5 12.Bh5 Ra5+=) 8.Be2 Bc5 9.0–0 0–0 10.Nc3 Nb6 11.Qc1 Nf6 12.Qd1 Re8 =.

6.b5 Be7 A) 7.Be2 Ne4 (7...0–0 8.Nf3 Ne4 9.0–0 Bf6 10.Be5 Nd7 11.d3 Nd6 12.Nc3 Bg4=) 8.Nf3 Bh4 9.g3 Bf6 10.Be5 Nd7 11.d3 Nd6 12.Nc3 Bh3+=; B) 7.Nf3 0–0 (7...c5 8.Be2 0–0 9.0–0 Ng4 10.h3 Nh6 11.g4 Be4 12.Nc3 Bf3=; 7...Nbd7 8.Be2 Nc5 9.0–0 Bg4 10.Bd4 0–0 11.Ne5 Be2 12.Qe2 Nce4=; 7...c6 8.Be2 0–0 9.Nd4 Be4 10.0–0 c5 11.Nf3 Qb6 12.Nc3 Bf3=; 7...a4 8.Be2 0–0 9.0–0 Bc5 10.Kh1 Ne4 11.Nd4 Bg6 12.d3 Nd6=) 8.Be2 Ne4 9.0–0 Bf6 10.Be5 Nd7 11.d3 Nd6 12.Nc3 Bg4=.

5.a3 c5

6.b5 d4 7.ed4 cd4 8.Ne2 =+.

6.bc5 Bc5 7.Nf3 0–0 8.Nc3 Nc6 9.Be2 h6 (9...a6 10.Ne5=+) 10.0–0 Rc8 11.Kh1 a6 12.Nh4 Bh7 13.g4 (better is 13.Nf3!?–/+) 13...Ng4!–+ 14.Bg4 (14.Ng2 Nf6–+) 14...Qh4 15.Rg1 (15.Bf3 d4 16.Ne4 Be4 17.Be4 de3–+) 15...d4 16.Na4 Ba7 17.Bc1 de3 (17...de3 18.de3 Na5–+) 0–1. Goan – Bennett, email 4AMM–08, 1997.

6.Nf3 Nbd7 7.Be2 cb4 8.Nd4 ba3 9.Na3 Bg6 10.0–0 Bc5 11.Nb3 Be7 12.Nb5 a6 13.N5d4 Bd6 14.Ba3 (14.h4 h6+=) 14...Ba3+= 15.Ra3 0–0 16.f5 ef5 17.Nf5 Ne5 18.Nbd4 Ne4 19.Rf4 Re8 20.Bd3 Nc4 (20...Bf5 21.Rf5 g6 22.Be4 de4 23.Rf4–/+) 21.Qa1+= Nf6 22.Rb3 Qc7 23.Nf3 (23.Qc3 a5+=) 23...Bf5–/+ 24.Rf5 Qe7 25.Qd4 b5 26.Rb1 h6 27.Qh4 Qd6 28.Rf4 Ne4 29.Qh5 (29.Be4 de4 Combination) 29...Ra7–/+ 30.Be4 Re4 31.Rg4 g6 32.Rd1 b4 33.h3 Kh7 (better is 33...Rg4!? 34.Qg4 a5–+) 34.Ng5–/+ Kg7 35.Ne4 de4 36.Qh4 (36.Qf5 Ne3 37.Qf2 Ng4 38.Qa7 Nf6–/+) 36...f5 37.Rg3 Na3 38.Qf4 Qf4 39.ef4 Nc2 40.Rb3 a5 41.Rb2 Nd4 42.Kf2? b3–+ (42...b3 43.Ke3 Nc2 44.Ke2 a4–+) 0–1. Keber,Ernst (1710) – Kuna,Heiko (2330), RSS5D pro–47, 2005.

6.b5 Nbd7

7.Be2 Qa5 8.Ra2+= Be4 (8...Be7 9.Nf3 0–0 10.0–0 Qa4 11.Ba1 c4 12.Nc3 Qa5 13.Nh4 Rfe8 14.g4+=) 9.Nf3 Bf3 10.gf3 0–0–0 11.Rg1 Rg8 12.c4 d4 13.ed4 Qb6 14.dc5 +=.

7.Be2 Bd6 8.Nf3 Qc7 (8...Nb6!?+= 9.0–0 (9.Be5 Be5 10.fe5 Nfd7 11.0–0 Qc7 12.d4 cd4 13.ed4 Qc2 14.Qc2+=) 9...0–0 10.Nh4 Na4 11.Be5 Re8 12.c4 Nb6 13.cd5 Bb1 14.Qb1=; 8...0–0 9.Nh4 Nb6 10.Nf5 ef5 11.Ra2 Qe7 12.0–0 Rfe8 13.Bf3 a6 14.Nc3=) 9.a4 (9.Nh4 Bg6 10.0–0 0–0–0 11.a4 d4 12.a5 Nf8 13.Qc1 N8d7 14.Na3=) 9...h6 (9...e5 10.Nh4 g6 11.Nf5 gf5 12.fe5 Be5 13.Be5 Qe5 14.Ra3+=) 10.c4 (10.a5 e5 11.fe5 Ne5= 12.Ra3 Neg4 13.b6 Qb8 14.Bb5=) 10...d4 (10...dc4 11.Na3+= c3 12.Bc3 0–0 13.Nc4 Rad8 14.0–0=) 11.Qb3 (11.ed4 Bf4 12.0–0 cd4 13.Bd4 e5–/+ 14.Be3–/+) 11...de3 12.de3 e5 (12...g5 13.Nc3 gf4 14.Rd1+= (14.b6 Qb6 15.Qb6 ab6 16.Nb5–/+)) 13.g3 (13.fe5 Ne5 14.Nbd2 Rd8+=) 13...0–0 (13...e4 14.Nfd2+=) 14.Nc3 (14.fe5 Ne5 15.Ne5 Be5–/+) 14...ef4 15.ef4 Rfe8 (15...Rae8+=) 16.0–0–0 (16.0–0!?+=) 16...Re3–/+ 17.Nh4 (better is 17.Nd2!?–/+) 17...Bf4!–+ 18.Rd2 (18.gf4 g5) 18...Re2! 19.Ne2 Bd2 20.Kd2 Be4 21.Rd1 Ne5 22.Kc1 g5 23.Rf1 Nfg4 24.Nc3 Nd3 25.Kb1 Bh7 26.Nf5 Qe5 27.h3 Bf5 28.hg4 Bg6 29.Ka1 Nb2 30.Qb2 Re8 31.Rf3? Qd4 0–1. Ardaman,Miles (2330) – Margvelashvili,Giorgi (2430), US Masters, Hendersonville USA, 2006.

7.Nf3 a6 A) 8.Nc3 A1) 8...Bd6 9.Rb1 (9.ba6 ba6 10.Be2 0–0 11.0–0 Rb8 12.Rb1 d4 13.Na2 Qa5 14.ed4+=; 9.Be2 Qb6 10.a4 0–0 11.a5 Qd8 12.b6 Rc8 13.Nh4 d4 14.Nf5+=) 9...ab5 10.Nb5 Be7 11.Be2 0–0 12.0–0 Ne4 13.d3 Nd6 14.Nd6=; A2) 8...ab5 9.Bb5 Be7 10.0–0 0–0 11.d3 Qb6 12.Rb1 Rfd8 13.Qe1 Nf8 14.Bc1=0; A3) 8...Be7 9.Be2 (9.ba6 ba6 10.Be2 0–0 11.Rb1 Qa5 12.Qc1 Rab8 13.0–0 Rfc8 14.Ne5+=; 9.Rb1 c4 10.Be2 Bg4 11.0–0 0–0 12.ba6 Ra6 13.Nb5 Qa5 14.Nfd4+=) 9...ab5 10.Nb5 0–0 11.Rb1 Qa5 12.Bc3 Qa4 13.d3 Ra6 14.Nh4+=; B) 8.ba6 ba6 9.Be2 (9.Nc3 Rb8 10.Rb1 Qa5 11.h3 Bd6 12.g4 Bg6 13.Bg2 0–0 14.f5+=; 9.Bd3 Bd3 10.cd3 Rb8 11.Be5 Rb6 12.0–0 Be7 13.Nc3 0–0 14.Rb1+=) 9...Rb8 10.Bc3 Ne4 11.Ba6 Be7 12.0–0 0–0 13.Bd3 Bf6 14.Be4+=.

7.Nf3 Bd6 8.Be2 Nb6 9.a4 (9.0–0 0–0 10.Nh4 Na4 11.Be5 Re8 12.Nf5 ef5 13.Bd6 Qd6 14.c3+=) 9...0–0 10.a5 Nbd7 11.Nh4 Re8 12.Nf5 ef5 13.a6 ba6 14.Ra6 =.

7.Nf3 Bd6 8.Be2 h6 9.0–0 0–0 10.h3 Bh7 11.d3 Qc7 12.Nbd2 Rae8 13.Re1 Re7 14.Nf1 Rfe8 15.Rc1 e5 16.fe5 Ne5 17.Ne5 Be5 18.Be5 Re5 19.Bf3 c4 20.a4 Qa5 21.d4 (21.dc4!? dc4 22.Bb7+=) 21...R5e7–/+ 22.c3 Bg6 23.Kf2 Bd3 24.Ng3 g6 25.Ne2? (better is 25.Kg1–/+) 25...Re3–+ 26.Qd2 (26.Kg1 Ne4 27.Nf4 Nc3 28.Qd2 Re1 29.Re1 Re1 30.Qe1 Ne2 31.Kf2 Qe1 32.Ke1 Nf4 33.g3 Nh3 34.Bd5–+) 26…Be2 0–1. Perrett,D (1950) – Jones,Ri (2075), 24th ECC, Kallithea GRE, 2008.

7.Nf3 Be7 8.Be2 h5 (8...Qb6 9.a4+= (9.Nh4 Be4 10.Nc3 0–0 11.0–0 c4 12.Kh1 h6 13.f5 Rae8 14.d3=; 9.0–0 a6 10.Nh4 c4 11.Nf5 ef5 12.a4 ab5 13.Bd4 Bc5 14.ab5+=) 9...Qa5 10.Bc3 Qc7 11.0–0 Bg4 12.a5 0–0 13.a6 Ne4 14.Be5=; 8...0–0 9.Nh4 (9.0–0 Ne4 10.d3 Nd6 11.a4 a6 12.ba6 Ra6 13.Nbd2 Qb6 14.Bc3+=) 9...Be4 10.0–0 Qb6 11.Nc3 c4 12.Kh1 h6 13.f5 Rae8 14.d3=; 8...Nb6 9.a4 (9.0–0 0–0 10.Nh4 Na4 11.Be5 Be4 12.c4 Nb6 13.d3 Nfd7 14.de4+=; 9.Nh4 Bg4 10.0–0 Be2 11.Qe2 Nc4 12.Be5 Qa5 13.a4 0–0 14.Nf3+=) 9...Nc4 10.Bc4 dc4 11.0–0 0–0 12.Ne5 Nd5 13.Nc4 Nb6 14.Nb6+/–; 8...a6 9.0–0 (9.ba6 ba6 10.Nc3 0–0 11.Rb1 Qa5 12.Nh4 d4 13.Nf5 ef5 14.Bf3+=; 9.Nc3 ab5 10.0–0 b4 11.ab4 Ra1 12.Ba1 cb4 13.Nb5 Be4 14.Ne5+=) 9...ab5 10.Nh4 Bg4 11.Bg4 Ng4 12.Qg4 Bh4 13.Qg7 Bf6 14.Bf6+=; 8...Ne4 9.0–0 Bf6 10.Ne5 0–0 11.Ra2 Ne5 12.fe5 Bg5 13.Kh1 d4 14.d3+=) 9.0–0= (9.Nc3 Nb6 10.d3 Rc8 11.Qc1 c4 12.Qd2 Bc5 13.a4 a5 14.ba6=; 9.Nh4 Bg4 10.0–0 Ne4 11.Nf3 Bf6 12.Ra2 Bb2 13.Rb2 Qf6 14.Rb3=) 9...Qb6 (9...h4 10.Nc3 Qc7 11.d3 0–0–0 12.Ng5 Bg6 13.Bf3 c4 14.Qe2=) 10.a4 a6 (10...a5 11.Na3= (11.d3 h4 12.Ne5 Ne5 13.fe5 Nd7 14.Nd2=) 11...h4 12.Ne5 Rd8 13.d3 0–0 14.c4=) 11.Ne5 (11.a5 Qd8 12.b6 (12.Nh4 ab5 13.Nf5 ef5 14.Bb5=) 12...h4= (12...Rc8 13.d3 Ng4 14.Qd2+= 0.41) 13.Ne5 Ne5 14.fe5+=) 11...Ne5 (11...Qc7 12.c4= ab5 13.cd5 ed5 14.Bb5=; 11...c4 12.Nc3 ab5 13.Nb5 Bc5 14.Bd4+=) 12.fe5+= Nd7 13.a5 Qc7 (13...Qd8 14.b6+=) 14.b6 Qb8 15.d4 (worse is 15.Bh5 Ne5 16.h3 Qd6–/+) 15...Bg6 (15...Bg5 16.Bc1+=) 16.c4 Qc8 (16...Bg5 17.Ra3+/–) 17.Nd2 (17.cd5 ed5 18.Nc3 Be4+–) 17...Nb8 (17...Qc6 18.Bf3+=) 18.Qb3 (18.Rc1 Qd7+/–) 18...cd4 19.ed4 dc4 20.Nc4 Qd7 21.Rfd1 Be4 22.Qg3 g6 23.Ba3+– Nc6?? 24.Be7 Nd4 25.Nd6 Qd6+= 26.Bd6 Ne2= 27.Kf2 Ng3 28.Kg3 Rc8 29.Rac1 Kd7 30.Rc7 Rc7 31.bc7 Bd5 32.Rf1 f5 33.Kf4 h4 34.Kg5 Bg2 35.Rf4 h3 36.Kg6 Rg8 37.Kf6 Rg4 38.Rf2 Bd5 39.Rc2 Rc4 ½–½. Peck,Philip J (2060) – Diamond,Daniel J (2110), 13th SWYM Rated, Millfield School ENG, 2003.

5.a3 Nbd7

6.Nf3 c5 7.bc5 Bc5 8.Be2 Rc8 9.Nc3 0–0 10.Qc1 Qa5 11.0–0 h6 12.h3 Ne4 13.Ne4 Be4 14.d3 Bh7 15.Nd4 Bd4 16.Bd4= Nc5 17.Qb1 Na4 18.Bf3 b6 19.Rf2 Rc7 20.Be5 Rc6 21.g4 Rfc8 22.Rg2 f6 23.Bd4 Re8 24.Qb4+/– Qb4 25.ab4 b5 26.Ba7 Rc7 27.Bd4 Rec8 28.Ra2+– Kf8 29.h4 Nc3 30.Ra5 Bg6 31.g5 hg5 32.hg5 fg5 33.Rg5 Bf5 34.Kf1 g6 35.Ke1 Ke8 36.Rg1 Rh7 37.Bc3 Rc3 38.Kd2 Rcc7 39.Rb5 Rh3 40.Be2 Rh2 41.Rc5 Ra7 42.b5 Kd7 43.Re1 Bg4 44.Rc3 Ra5 45.Rb3 Ra2 46.b6 Kc8 47.b7 Kb8+/– 48.Rb4 Be2 49.Re2 Rc2 50.Kc2 Re2 51.Kc3 Re3 52.Kd4 Re1 53.Rb2 Rd1 54.Re2 Rf1 55.Re6 Rf4 56.Kd5 Kb7 57.Rg6 Kc7 58.Rg7 Kd8 59.d4 Rf6 ½–½. Dague,Georges – Dubois,Robert, corr FRA–ch24, 1959.

6.Nf3 h6 7.Be2 a6 (7...c5 8.bc5 Bc5 9.Nd4=) 8.0–0 c5 9.bc5 Bc5 10.Nd4 Bg6 11.d3 Qc7 12.Qc1 Rc8 13.Bd1? (better is 13.Ra2!?=+) 13...Bd4–/+ 14.Bd4 (14.ed4!? Bd3! 15.Rf3–/+) 14...Bd3!–+ 15.Rf2 Bg6 16.c3 0–0–+ 17.g4 e5 18.fe5 Ne5 19.Rg2 Ne4 20.Be2 Nc6 21.Bd3 Nd4 22.ed4 Nc3 23.Nc3 Bd3 24.Ne2 Qc1 25.Rc1 Rc1 26.Nc1 Be4 ½–½. Ohman,HE – Sildmets,Anton, 12. Midwest op, 1998.

5.a3 Be7

6.Be2 0–0 7.d4 (7.Nf3 a5=+) 7...Nc6 (7...a5 8.b5–/+) 8.Nc3 (8.Nf3 Ne4=+) 8...Re8 (8...a5 9.b5 Na7 10.Nf3=+) 9.Nf3=+ Ng4 10.Qd2 Bh4 11.Nh4 Qh4 12.g3 Qe7 (12...Qh3 13.Bf1 Qh5 14.Be2=) 13.0–0 a6 14.Bf3 Nf6=+ 15.Qe2 Rad8 16.Rab1 Qd6 17.Rbe1 h6 18.Bg2 Rd7 19.Rd1 Bg4 20.Bf3 Bf3 21.Qf3 Red8 22.Rd2 Ne7 23.e4 de4 24.Ne4 Ne4 25.Qe4 Qd5 26.Qd5 Nd5 27.Re2 Nb6 28.f5 ef5 29.Rf5 Nc4 30.c3 Nb2 31.Rb2 Re8 32.Kg2 f6 33.Rbf2 Kh7 34.a4 Rde7 35.Rc5 c6 ½–½. Psion – Psion, 4 Min/Zug, 1989.

6.Nf3 0–0 7.Nc3 a6 8.Ne2 (8.Nd4 Bg4 9.Be2 Be2 10.Qe2 a5=+) 8...c5 9.bc5 Bc5 10.Ng3 Bg6 11.Nh4 (11.Ne5=) 11...Ne8 (11...Be4 12.d3 Qa5 13.Qd2 Qd2 14.Kd2+/–) 12.Qg4 (12.Ng6 fg6 13.Qg4 Qb6=) 12...Be7?? (better is 12...Bc2 13.Rc1 f5=+) 13.Ng6+= hg6 14.h4 Bf6 15.c3 Nd6 16.h5 g5 17.Bd3 e5 18.fe5+/– Be5 19.Nf5 Re8 20.a4 Ne4 21.Rf1 Re6 22.0–0–0 Nd7 23.h6 gh6=+ 24.Ba3 Ndc5–/+ 25.Bc2 Qb6 26.Qh5 Nb3= 27.Bb3 Qb3 28.Bf8?? Kf8–+ 29.Qf7 Kf7 30.Nd4 Rf6 31.Nb3 Rf3 32.gf3 Nd6 33.Nc5 Ke7 34.Kc2 Kd8? 35.Rh1+– Kc7 36.Rh6 Kc6 37.d4 Bg7 38.Rg6 (38...b6 39.Nd3+–) 1–0. Finenko – Kovalenko,A, USSR, 1990.

5.b5 a6! 6.a4 ab5 7.ab5 Ra1

8.Ba1 c5 9.bc6 bc6 10.Nf3 Bd6 11.Be2 0–0 12.0–0 h6 13.h3 Bh7 14.d3 Nbd7=+ 15.Nbd2 Qb6 16.d4 c5 17.g4 c4 18.Ne5 Qd8 19.Ndf3 Ne4–/+ 20.Qe1 f6–+ 21.Nc4 dc4 22.Bc4 f5 23.Be6=+ Kh8 24.c4 Qe7 25.gf5= Bb4 26.Qb1 Bf5 27.Bf5 Rf5 28.Ne5 Re5 29.de5 Nd2=+ 30.Qg6 Nf1 31.Kf1 Nf8 32.Qg4 Qa7 33.Bd4= Qa2 34.Qc8 Qb1 35.Ke2 Qe4 36.c5 Kg8 37.c6 Kh7 38.c7 Ng6 39.Qg4 Qc2 40.Kf1 Qc7 41.f5= Qc1 42.Ke2 Qd2 43.Kf3 Ne7 44.Qe4 Qh2 45.f6= Ng6 46.Qf5 Qh1 47.Ke2?? Qe1–+ 48.Kf3 Qf1 49.Kg4 Qe2 50.Qf3 h5! 51.Kg3 Be1 (51...Be1 52.Qf2 Qf2#) 0–1. Lindner,Hans Dieter – Exizoglou,Dimitri, Mittelfranken–ch Nord HT, 1996.

8.Ba1 Bc5 9.Nf3 0–0 10.Bd3 Bd3 11.cd3 c6 12.Qb3 Nfd7 13.Nc3 Qf6 14.0–0 Qg6 15.Ne2 Bd6 16.Bd4 f6 17.e4 Kh8 18.Be3 Re8 19.bc6 bc6 20.Qc2 c5 21.Nc3 d4 22.Nb5 Be7 23.Bf2 f5 24.Qc4 Rf8 25.Re1 fe4 26.Re4 e5 27.Ne5 Ne5 28.Re5 Rf4 29.Bg3 Rf7 30.Qd5 Qf6 31.Re1 Nc6 32.Nd6+= Bd6 33.Qd6 Qd6 34.Bd6 h6 35.Bc5 Rf5 36.Rc1 Kh7 37.Bd6 Nd8 38.g4 Rg5 39.h3 Rd5 40.Bg3 Kg6 41.Re1 h5 42.Kf2 hg4 43.hg4 Kf6 44.Kf3 Ne6 45.Bh4 g5 46.Bg3 Nc5 47.Re8 Rd7 48.Rc8 Rd5 49.Bf2 Ne6 50.Rc4 Ke5 51.Bg3 Kf6 52.Ke4 Rb5 53.Bd6 Kf7 54.Rb4 Ra5 55.Rb1 Kg6 56.Rf1 Nc5 57.Bc5 Rc5 58.Kd4 Rc8 59.Rf5 Ra8 60.Rc5 Rd8 61.Ke4 Re8 62.Re5 Rf8 63.Ke3 Rh8 64.d4 Rh3 65.Ke2 Rg3 66.Re4 (66.Re4 Rb3 67.d5+–) 1–0. Kucharkowski,Jens – Ryska,Jiri, CiF, 2005.

8.Ba1 c6 9.Nf3=+ Nbd7 10.Nc3 h6 (10...Bc5 11.Nh4=+) 11.bc6= bc6 12.Nd4 Qb6 (12...Bg4 13.Qb1 Qc7 14.Qa2=) 13.Nf5 ef5 14.Bd3 g6 15.0–0 Bg7 16.Qb1 0–0 17.Qb6 Nb6 18.Rb1 Nfd7 (18...Nc4 19.Bc4 dc4 20.Kf1=) 19.Ne2 Ba1 20.Ra1 Ra8 21.Ra8 Na8 22.Nd4 c5 23.Nc6 c4 24.Be2 Nab6 25.Bf3 Kf8 26.Kf2 Nc5 27.Ke2 Ne4 28.d3 cd3 29.cd3 Nf6 30.Kd2 Ke8 31.Kc3 Kd7 32.Ne5 Ke6 33.Kd4 g5 34.h3 Nc8 35.g3 Nd6 36.Kc5 Nb7 37.Kb5 Nd6 38.Kb4 Nfe8 39.Nc6 f6? 40.Nd4+– Kd7 41.Bd5 Nc7 42.Bc6 Ke7 43.Ka5 Ne6 44.Ne6 Ke6 45.Kb4 h5 46.h4 gh4? 47.gh4 Nf7 48.Be8 (48.Be8 Nh6 49.Kc5+–) 1–0. wiking – tenpugov, internet, 2010.

8.Ba1 Nbd7 9.Nf3 Qa8 10.Bb2 Bc5 11.Nc3 0–0? 12.Be2 White is behind in development. (12.Bd3 Bd3 13.cd3 Ba3 14.Ba3 Qa3=) 12...Qa7 13.0–0 Ra8 14.Nh4 d4 15.ed4 Bd4 16.Kh1 Ne4 17.Ne4 Be4 18.Bd4 Qd4 19.d3 Bg6 20.Bf3 White threatens to win material: Bf3xb7 20...Nc5 (20...Qf4? doesn't lead to anything significant 21.Bb7 Qh4 22.Ba8+–) 21.Ng6 hg6 22.g3 Ra4 23.Qd2 b6 24.Kg2 White king safety dropped 24...Ra2 25.Rf2 Na4 26.Bc6 An ideal square for the white bishop. 26...Nc3 27.Rf3 (27.Qe1 Nd5 28.Bd5 Qd5 29.Qe4 Qb5–/+) 27...Rb2 (better is 27...Nb1 28.Qc1 Na3–+) 28.Re3? (28.Rf2 Nb5 29.Bb5 Rb5–/+) 28...Nb5 (better is 28...Qa4 a pity that Black didn't try this 29.Qc3 Rc2 30.Qc2 Qc2 31.Kg1 g5–+) 29.Bb5–/+ Rb5 30.Re4 Qc5 31.Qe2 Rb1 32.Qf2 Qd5 33.Kh3 c5 34.Re5 White threatens to win material: Re5xd5 34...Qd7 35.Qf3 Ra1 36.Kg2 Ra2 37.Re2 b5 38.g4 b4 39.Kg3? Qd4?? not a good decision, because now the opponent is right back in the game 40.Qb7?? the position is going down the drain 40...Ra1 41.Qb8 Kh7–+ 42.Qe5 Rg1 43.Kh3 Qd5 44.Qe3?? causes further problems for ? 44...Rf1 45.Kg3–/+ f5 46.g5?? causes even greater problems 46...e5!–+ Mate attack 47.Rf2 Rg1 48.Kh3 ef4 49.Qf4 Rg4 50.Qf3?? the position was bad, and this mistake simply hastens the end 50...Qd4 51.Rg2 Rh4 52.Kg3 Rh5 53.h3 Rg5 54.Kh2 Qe5 55.Kh1 Qe1 56.Kh2 Rg2 57.Qg2 Qe3 58.Qd5 Qf2 59.Kh1 Qc2 60.Qd8 Qd1 (60...Qd1 61.Kh2 Qd2 62.Kg3 b3–+) 0–1. Duerwald,Martin (2135) – Peng,Zhaoqin (2400), Oberliga NRW, 2001.

8.Ba1 Nbd7 9.Nf3 Qa8 10.Bb2 Bd6 (10...Bc5 11.Nc3=+) 11.Be2= c5 12.0–0 Qa2 13.Qc1 Qa4 14.Nc3 Qc2 15.Qa1 0–0 16.Qa3 (16.Bd1 Qd3 17.Be2 Qc2=) 16...Bg4 (better is 16...c4 17.Qd6 Qb2–+) 17.e4?? (better is 17.Nd5 Nd5 18.Bd3–/+) 17...Bf3–+ 18.gf3 Qd2 19.Bc1 Qd4 20.Kh1 Nh5 21.Rg1 Bf4 22.Rg2 Qe5 23.Nd1 Bc1 24.Qc1 Nf4 25.Rg4 Ne2 26.Qe3 f5 27.Rg5 f4 28.Re5 fe3 (28...fe3 29.Rg5 Rf3 30.Ne3 Re3 31.ed5 e5–+; 28...Ne5 29.Qe2 d4 30.Qa2+/–) 0–1. Stabenow,Juergen – Russo,D, corr ICCF EU/M/Gr/172 (year?).

8.Ba1 Nbd7 9.Nf3 Be7 10.Bc3 0–0 11.Be2 Qa8 (11...Ne4 12.Bd4+=) 12.0–0 Qa2 13.Nd4 Bg6 14.d3 (14.f5 ef5 15.Nf5 Bf5 16.Rf5 Ne4=) 14...Ra8 15.Nd2 Bd6 (15...Qa3 16.N2b3=) 16.N2b3 e5 17.fe5 Ne5 (17...Be5 18.Qd2 Qa7 19.Ra1=) 18.Qd2 (18.h4 h6=) 18...Qa7= 19.Ra1 (19.Nf5 Bf5 20.Rf5 Re8=) 19...Qb8 20.Ra8 Qa8 21.Bb4 Qf8 22.Bd6 Qd6 23.Qa5 b6 24.Qa8 Qf8 25.Qb7 Qd8 26.Nd2 h6 27.Nf1 ½–½. Hirtreiter,Michael – Ullrich, BdF, 1988.

8.Ba1 Nbd7 9.Nf3 Be7 10.Be2= 0–0 11.Nd4 Bg6 12.f5 Bf5 13.Nf5 ef5 14.0–0 g6 15.Bf3 Nb6 16.Qe2 Re8 17.Nc3 Bc5 18.Nd1 Nbd7 19.c4 d4 20.Bb7 de3 21.d4 Bf8 22.Nc3 Bh6 23.Bc6 Re7 24.Bb2 Ne8 25.Nd5+/– Re6 26.Ra1 f4 27.Ra8 Nb8 28.Nb4 Bg7? 29.Bd5 Rd6 30.Nc6 Rc6 31.bc6 (31.bc6 h6 32.Bc3+–; 31.Bc6?! Nd6+–) 1–0. Kucharkowski,Jens – Batres Bianchi,Luis Carlos, CiF, 2002.

5.b5 Bc5

6.Nf3 0–0 7.Be2 h6 (7...a6 8.Nd4=+) 8.Bd4 (8.0–0 a6=) 8...Nbd7 (8...Be7 9.Nh4=+) 9.0–0= Be4 10.Nc3 (10.Bc5 Nc5 11.Ne5 Nfd7=) 10...Bf3=+ 11.Rf3 Bd4 12.ed4 Qe7 13.Rb1 b6 (13...Qd6 14.Qe1=+) 14.Rg3 Ne4 15.Ne4+= de4 16.c3 Nf6 17.Qc2 a5 18.ba6 Ra6?? 19.Ba6+– Ra8 20.Bb7 Ra7 21.Be4 Ne4 22.Qe4 Ra2 23.f5 Rd2 24.Qf4 Re2 25.f6 Qd6 26.Rg7 Kf8 27.Qh6 Ke8+– 28.Qh8 Kd7 29.Rf7 Kc6 30.Qa8# 1–0. marre – oppo111, internet, 2010.

6.Nf3 a6 7.a4 (7.Bd4 Bd4 8.Nd4 Ne4 9.ba6 ba6=+) 7...0–0 8.Be2 (8.Bd3 ab5 9.ab5 Ra1 10.Ba1 Nbd7=+) 8...ab5 9.ab5 Nbd7 10.0–0 Qe7 11.Ra8 (11.Nc3 Ra1 12.Ba1 Ra8–/+) 11...Ra8–/+ 12.Bd4 Bg4 13.Bc5 Qc5 14.Nc3 Bf3 15.Bf3 Nb6 16.Qe1 Nc4 17.Be2 Nd6 18.Bd3 h6 19.Qb1 d4–/+ 20.ed4 Qd4 21.Kh1 Nde4 22.Ne4 Ne4 23.Be4 Qe4 24.d3 Qd4 25.h3 g6 26.Kh2 Ra3 27.Qc1 Ra2 28.Qb1 Rb2 29.Qa1 Qc3 30.Qa8 Kg7 31.Qb7 Qc2 32.Qe4 Rb5 33.Qd4 Kh7 34.Rf2 Qc1 35.Rf3 Rd5 36.Qf6 Rf5 37.Qd4 Qc5 38.Qe4 Qd6 39.Kh1 Rd5 40.Kh2 c5 41.Kh1 Rd4 42.Qe3 Rb4 43.Qc1 Kg8 44.Kg1 h5 45.Kh1 h4 46.Kg1 Qd4 47.Kh2 Ra4 48.Qg1 Ra3 49.Qf1 Ra1 50.Qf2 Rd1 51.Qd4 cd4 52.g4 hg3! 53.Kg3 Kg7 54.Kf2 Rd2 (54...Rd2 55.Ke1 Rh2–+) 0–1. Wolf,Wolfgang (2285) – Rohde,Karsten (2290), BdF, 2003.

6.Nf3 Nbd7 7.Be2 0–0 8.0–0 Ne4 9.Nd4 Bg6 10.Nb3 Be7 11.d3 Nd6 12.a4 Nf5 13.Qc1 Nc5 14.Nc5 Bc5 15.d4 Bb4 16.Na3 Qe7 17.c4 Rfe8 18.c5 Rab8 19.Nc2 Ba5 20.Ba3 c6 21.Bb4= Bd8 22.a5 a6 23.b6 Qd7 24.Be1 Be7 25.Nb4 Rbd8 26.Ba6 ba6=+ 27.Na6 (The passed pawn on b6 will quickly become a dangerous weapon) 27...Rf8 28.Nb4= Bf6 29.Bf2 Ra8 30.a6 Bh5 31.Qb2 Rfb8 32.b7 Ra7 33.Nc6 Qc6 34.Qb6 Qb6 35.cb6 Ra6 36.Ra6 Be7 37.Ra8 Bd6 38.Rb8 Bb8 39.Rc1 g6 40.Rc8 Kg7 41.Rb8 (41...Ne7 42.Rc8 Nc8 43.bc8Q+–) 1–0. Furlepa,Zdzislaw – Szczepaniak,Alicja, corr 1. AMM Poland, 1991.

5.b5 c6

6.a4 Bc5 7.Nf3 a6 8.Nd4 0–0 9.Be2 ab5 10.ab5 Ra1 11.Ba1 cb5 12.Bb5 Nc6.

6.a4 Bd6 A) 7.Nf3 0–0 (7...Nbd7 8.Nc3 0–0 9.Be2 e5 10.fe5 Ne5 11.Nd4 Bg4 12.0–0 Qc7; 7...a6 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 Bc2 11.Be2 c5 12.Qa7 b6) 8.Nc3 Nbd7 9.Be2 e5 10.fe5 Ne5 11.Nd4 Bg4 12.0–0 Qc7; B) 7.Nc3 Nbd7 (7...0–0 8.Nf3 Nbd7 9.Be2 e5 10.fe5 Ne5 11.Nd4 Bg6 12.0–0 Qc7; 7...Qb6 8.Nf3 Nbd7 9.a5 Qc7 10.a6 0–0 11.Be2 Bc5 12.ab7 Qb7; 7...h6 8.Nf3 Nbd7 9.Be2 0–0 10.0–0 Nc5 11.Nd4 Qd7 12.Qe1 Rab8; 7...a6 8.Nf3 ab5 9.ab5 Ra1 10.Ba1 0–0 11.Be2 Nbd7 12.Nd4 Qc7) 8.Nf3 0–0 9.Be2 e5 10.fe5 Ne5 11.Nd4 Bg6 12.0–0 Qc7.

6.a4 Nbd7 7.Nf3 (7.Nc3 Bb4 (7...Bd6 8.Nf3 0–0 9.Be2 c5 10.0–0 d4 11.ed4 cd4 12.Nd4 Bc5; 7...h6 8.Nf3 Bd6 9.a5 a6 10.bc6 bc6 11.Nd4 0–0 12.Nc6 Qc7; 7...e5 8.fe5 Ne5 9.Nf3 Nf3 10.Qf3 Bc2 11.Rc1 Bb3 12.Bd3 Bd6; 7...Nc5 8.Nf3 Bd6 9.Be2 0–0 10.0–0 h6 11.Nd4 Qd7 12.Qe1 Rab8) 8.Nf3 0–0 9.bc6 bc6 10.Be2 Bc5 11.0–0 Rb8 12.Rb1 h6) 7...Qc7 (7...Bc5 8.Nc3 0–0 9.Bd3 Re8 10.0–0 Qc7 11.a5 Rab8 12.Ba3 Qd6; 7...Bb4 8.Be2 0–0 9.0–0 Nc5 10.Bc3 Bc3 11.Nc3 Qc7 12.Nd4 h6) 8.Na3 (8.Nc3 Bc5 9.Bd3 0–0 10.0–0 Rfe8 11.Ne2 Ne4 12.Ned4 Bg4) 8...Bd6 (8...Bc5 9.Bd3 0–0 10.0–0 h6 11.Nd4 Bd3 12.cd3 e5) 9.c4 (9.Bd3 0–0 10.0–0 a6 11.Bf5 ef5 12.c4 cb5) 9...c5 (9...0–0 10.cd5 cd5 11.Be2 Rac8 12.0–0 Qa5) 10.cd5 (10.Nh4 Bg4 11.Be2 Be2 12.Qe2 0–0) 10...ed5 11.Rc1 (11.Nh4 Bg4 12.Be2 Be2) 11...h6 (11...0–0 12.Be2+= h6) 12.Qb3 (12.Be2 Qd8+= (12...0–0=)) 12...g5 (12...c4 13.Qd1+=; 12...0–0–/+) 13.Bd3 Bg4 (13...Be4 14.fg5 Bf3 15.gf3 hg5 16.Bf5+=) 14.b6 (14.Ne5 Ne5 15.fe5 Be5 16.Be5 Qe5 17.Rc5 Be6=) 14...Qb6+= 15.Bb5 (15.Qb6 ab6 16.Ne5 A) worse is 16...Ra4 17.Ng4 Ng4 18.Nb5+/– (18.Bh8?! Ra3 19.Bf5 Ngf6=); B) 16...Rf8=) 15...Ke7 16.Ne5 Be6 (16...c4!? 17.Nec4 dc4 18.Nc4 Be6 19.Nb6 Bb3 20.Na8 Ra8 21.fg5 hg5+=) 17.Nd7+= Nd7 18.Bh8 Rh8 19.Qc3 Rg8 20.a5 Qc7 21.Bd7 Bd7 (worse is 21...Kd7 22.Nb5 Qc6 23.Nd6 (worse is 23.Na7 Qa6–/+) 23...Qd6 24.0–0+/–) 22.0–0 gf4 23.ef4 Bf4 24.Rce1 Be6 25.Rf4 Qf4+= 26.Qc5 Qd6 27.Qe3 d4 28.Qf3 Qc6 29.Qf2 Rg5 30.g3 Ra5 31.Nb1 Qb6 32.d3 Ra1 33.Nd2 Re1 34.Qe1 Qa5 35.Qc1 Qc3 (35...Qc3 36.Qe1 Qd3–+) 0–1. Corbin,Philip (2260) – Neubauer,Martin (2455), Heroes Day Masters, Bridgetown BAR, 2005.

6.a4 Be7 7.Nf3 =+.

6.Ne2 A) 6...a6 7.a4 (7.Nd4 Bg4 8.Be2 Be2 9.Qe2 ab5 10.0–0 Nbd7 11.d3 Nc5 12.Nd2 Bd6) 7...Nbd7 (7...Bc5 8.Nd4 ab5 9.ab5 Ra1 10.Ba1 0–0 11.Be2 cb5 12.Bb5 Bg4) 8.Nbc3 Bc5 9.Ng3 Bg6 10.Bd3 Bd3 11.cd3 d4 12.Nce4 Ne4; B) 6...Bc5 7.Ng3 (7.Nd4 0–0 8.Nf5 ef5 9.Nc3 a6 10.Na4 Be7 11.b6 Nbd7 12.Rb1 Ne4; 7.Nbc3 a6 8.Na4 Bd6 9.bc6 Nc6 10.Nd4 Nd4 11.Bd4 b5 12.Nc3 b4) 7...d4 (7...Bg6 8.Nc3 a6 9.bc6 Nc6 10.Bd3 Bd3 11.cd3 Nb4 12.Qb1 0–0; 7...0–0 8.Nc3 a6 9.Nf5 ef5 10.Na4 Be7 11.b6 Nbd7 12.Rb1 Ne4) 8.Nf5 ef5 9.ed4 Bd4 10.Qe2 Kf8 11.c3 Bb6 12.d4 Nd5.

6.Nf3 A) 6...Bc5 7.Bd4 Ne4 (7...Nbd7 8.Nc3 0–0 9.bc6 bc6 10.Bd3 Rb8 11.0–0 Qc7 12.Qe2 Bg4; 7...Bd4 8.Nd4 Ne4 9.h4 Ng3 10.Rh2 a6 11.b6 Nd7 12.Nc3 c5; 7...Qe7 8.Nc3 a6 9.Bc5 Qc5 10.Na4 Qc2 11.Qc2 Bc2 12.Nb6 Ra7; 7...Bb6 8.Bb6 Qb6 9.Nc3 a6 10.bc6 Nc6 11.Bd3 d4 12.ed4 Bd3) 8.Bc5 Nc5 9.Nc3 a6 10.ba6 Nba6 11.Ba6 Ra6 12.0–0 0–0; B) 6...a6 7.Nd4 (7.a4 Bc5 8.Nd4 ab5 9.ab5 Ra1 10.Ba1 0–0 11.Nf5 ef5 12.Nc3 Qa5; 7.bc6 Nc6 8.Bd3 Bd3 9.cd3 Bd6 10.Na3 Rc8 11.0–0 Nd7 12.Nc2 Nc5) 7...Bg4 (7...Bg6 8.a4 Ne4 9.Nf3 ab5 10.ab5 Ra1 11.Ba1 Nd7 12.Nc3 Nec5) 8.Be2 Be2 9.Qe2 ab5 10.0–0 Nbd7 11.d3 Bc5 12.Nd2 0–0.

5.b5 Bd6

6.Nf3 0–0 7.c4 c5 8.Be2 Nbd7 9.a4 Nb6 10.Na3 a5 11.0–0 Re8 12.Ne5 Qc7 (12...Nfd7 13.Rc1=) 13.g4 Bg6 14.h4 Nfd7? (better is 14...h6=) 15.Nd7+– Qd7 16.h5 Nc4 17.Nc4 dc4 18.hg6 hg6 19.Bc4 Rad8 20.Bc3 b6 21.g5 Re7 22.Qg4 Qe8 23.Rf3 Qf8 24.Qh4 f6 25.gf6 gf6 26.Bf6 (26.Bf6 Rde8 27.Qg5+–; better is 26.Rh3 Rdd7 27.Qh8 Kf7 28.Qf6 Ke8+–) 1–0. Kucharkowski,Jens – Ebert,Andreas, corr DDR–ch, 1985.

6.Nf3 0–0 7.Be2 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 Bc5 11.0–0 Nbd7 12.Bd4 Qe7 13.Bc5 Nc5 14.Nd4 Bg6 15.Nc3 Nce4 16.Ne4 Ra8?? (better is 16...Ne4 17.Bd3 Ra8=) 17.Nf6+– (17.Nf6 Qf6 18.Bg4+–) 1–0. Riepe,Bernhard – Erbe,Holger, DESC, 2004.

6.Nf3 a6 7.Nc3 =+.

6.Nf3 Nbd7 7.c4 0–0 (7...dc4 8.Bc4 Nb6 9.Be2=) 8.Nc3 Nc5 9.d4 (9.cd5 ed5 10.Rc1 Re8–/+) 9...Nce4 10.c5 Nc3 (10...Be7 11.Be2=+) 11.Bc3 Be7 12.Bd3 =. Lehmann – Dahl, Berlin, 1962.

6.Nf3 Nbd7 7.d4 0–0 8.Ba3 –/+.

6.Nf3 Nbd7 7.d4 Ng4 8.Qe2 (8.Qd2 Ndf6–/+) 8...Qf6 (8...Nb6 9.h3 Nf6 10.g4–/+) 9.h3=+ Qh6 (better is 9...Nh6=+) 10.hg4+/– Qh1 11.gf5 ef5 12.Nbd2 (12.c4 Nf6+=) 12...Qh6 (12...0–0–0 13.0–0–0+=) 13.Ne5 (13.c4 Nf6+/–) 13...f6 (13...Ne5 14.de5 Bc5 15.Nb3 Bb4 16.c3 Qh4 17.Qf2+/–) 14.Nd3 (14.Nd7 Kd7 15.Qf3 Qh4 16.Kd1 Rae8+/–) 14...Nb6+= 15.a4 0–0 (15...a6 16.Nf2+/–) 16.a5 Qh4 (16...Nc8 17.Qf3 Ne7 18.c4 dc4 19.Nf2+–) 17.Qf2+– Qf2 18.Kf2 Nc8 (18...Nd7 19.Be2+–) 19.c4 c6? (19...Re8 20.a6 ba6 21.Ra6 dc4 22.Nc5+–) 20.cd5 (better is 20.a6 Rf7 21.ab7 Rb7 22.bc6 Rbb8+–) 20...cd5 21.Be2 g5 22.g4 Ne7 23.gf5 Rac8 24.Bd1 Kg7 25.Bb3 Rfe8 26.e4 de4+/– 27.Ne4 Nf5 28.Nd6 Nd6 29.b6 Nc4? 30.Bc4+– Rc4 31.ba7 Ra8 32.fg5 Rc2 33.Kf3 Ra7 34.gf6 Kf6 35.d5 Ke7 36.Bd4 Ra8 37.Bc5 Rc5? 38.Nc5 Kd6 39.Nb7 Kd5 40.Rc1 Ra7 41.Rc7 h6 42.Ke3 Ra6 43.Rc5 Ke6 44.Rh5 Kf7 45.Ke4 Kg6 46.Rd5 Ra7 47.Rd6 Kg7 48.a6 h5 49.Kd5 h4 50.Kc5 Ra8 51.a7 h3?? 52.Rd2 Kf6?? 53.Rh2 (53…Ra7 54.Rh3 Rb7 55.Rh8=; better is 53.Kb6+–) 1–0. Roczniak,Jan – Smolarek, corr Poland (year?).

6.Nf3 Nbd7 7.Be2= 0–0 8.0–0 Rc8 9.c4 c6 10.Nc3 Nc5 11.d4 Nce4=+ 12.Ne4 Ne4 13.c5 Bb8 14.a4 b6 15.bc6 Rc6 16.Bb5 Rc8 17.c6 a6 18.Ba6 Rc6 19.Rc1 Rc7 20.Qb3+= f6 21.Ba3 Nd6 22.Qb4 Ra7 23.Be2 Rff7 24.Rc6 Nc8 25.Nh4 Be4 26.Re6 Qd7 27.Re4 Ra4? 28.Bb5 Rb4 29.Bd7 de4 30.Bc8 Rb3 31.Be6 Ra3 32.Rc1 (32.Rc1 g6 33.Rc8 Kg7 34.Bf7 (34.Rb8?! Rc7 35.h3 Rc1 36.Kh2 Rc7+–) 34...Bf4 35.ef4 Kf7 36.Rc7 Kg8 37.Rc6+–; 32.Bf7 Kf7 33.Re1 b5=+) 1–0. Epelman,Yefim Grigorevich – Barinov,VG, Soviet Union, 1971.

5.b5 Nbd7

6.Nf3 Be7 7.Nc3 c5 (7...Ne4 8.d3 Ba3 9.Qb1 Nc3 10.Bc3=) 8.Ne2 (8.bc6 bc6 9.Nd4 Bg4=) 8...h6 (8...0–0 9.d3–/+) 9.Ng3 Bh7 (9...Bg4 10.h3 Bf3 11.Qf3=+) 10.a4 (10.Be2 0–0=) 10...0–0 11.Be2 Rc8 (11...Ne4 12.Ne4 de4 13.Ne5=) 12.0–0= Re8 (12...Ne4 13.Ne4 Be4 14.d3 Bf3 15.Bf3= (< 15.gf3 Bf6 16.c3 d4=+)) 13.Bd3 (13.a5 Ne4=) 13...Bd3=+ 14.cd3 a6 (14...Qb6 15.Qc2=) 15.Ne5 (15.Be5 Qa5=) 15...Qb6=+ 16.Qf3 (16.Nd7!? Nd7 17.Qg4=+) 16...ab5–/+ 17.ab5 Ra8 (17...Qb5 18.Rfb1 Ne5 19.fe5–/+) 18.Rab1 (18.Nd7 Nd7 19.Ra8 Ra8=+) 18...Ra5 (18...Qb5 19.Nf7 Qd3 20.Bf6 Nf6 21.Ne5 Qd2 22.Rfd1–/+) 19.Nd7=+ Nd7 20.Nh5 (20.Qg4 Nf6 21.Bf6 Bf6=+) 20...g6 21.f5? ef5?? 22.Nf4–/+ Rb5 23.Nd5=+ Qd8 24.e4 Nb6=+ 25.Ne7 Qe7 26.Bf6 Qd7 27.Rb5 Qb5 28.ef5 Qd7 29.fg6 fg6 30.Qf4 Kh7 31.Bc3 h5 32.Qf7 Qf7= 33.Rf7 Kh6 34.Rb7 Na4 35.Bg7 Kg5+= 36.Kf2 Kf5 37.d4+/– Rd8 38.Ra7 Nb2 39.dc5 Rd2 40.Ke3 Nc4 41.Kf3+/– g5 42.Rf7 Kg6 43.Ra7 Kf5 44.Rf7 Kg6 45.Re7 g4 46.Kg3 Rd5 47.Bf8 Rf5 48.Rg7 Kf6 49.c6 Ke5 50.Bb4 Nd6 51.Re7 1–0. Vokac,Marek (2470) – Hribar,Bojan (2250), Komercni Banka op, 1996.

6.Nf3 Bd6

7.Nc3 0–0 A) 8.Nd4 A1) 8...Bg6 9.Be2 (9.Bd3 Bd3 10.cd3 e5 11.fe5 Ne5 12.Qe2 a6 13.0–0 Re8 14.a4) 9...e5 10.fe5 Ne5 11.0–0 h6 12.Nf5 Bf5 13.Rf5 Qe7 14.a4; A2) 8...Be4 9.d3 Bg6 10.Be2 Qe7 11.Qd2 e5 12.fe5 Qe5 13.Nf3 Qh5 14.0–0; B) 8.Bd3 B1) 8...Ne4 9.Qe2 (9.0–0 Ndc5 10.Be4 de4 11.Nd4 a6 12.Qe2 h6 13.Nf5 ef5 14.a4; 9.Be2 Ndc5 10.0–0 Qf6 11.Rb1 Nc3 12.Bc3 Qh6 13.d3 a6 14.b6) 9...Ndc5 10.0–0 Bg4 11.Qd1 Qe7 12.Be2 g6 13.Ne4 de4 14.Ne5; B2) 8...Nc5 9.Bf5 ef5 10.Nd4 Qd7 11.0–0 a6 12.a4 g6 13.Qe2 Rfe8 14.Ba3; B3) 8...Re8 9.0–0 (9.Qe2 Nc5 10.Bf5 ef5 11.0–0 Bf4 12.Nd4 Be5 13.Nf5 d4 14.Nd1; 9.Bf5 ef5 10.0–0 Nb6 11.Nd4 Nc4 12.Rb1 Qd7 13.Qe2 Bb4 14.Qd3) 9...Bd3 10.cd3 a6 11.a4 h6 12.Qc2 Qe7 13.d4 Ng4 14.h3; B4) 8...Bd3 9.cd3 a6 10.0–0 Nc5 11.Qc2 h6 12.a4 Qd7 13.Ba3 ab5 14.Ne5; B5) 8...g6 9.Qe2 (9.0–0 Nc5 10.Be2 a6 11.ba6 Na6 12.Nb5 Be7 13.Ne5 c6 14.Nd4; 9.a4 Nc5 10.Bf5 ef5 11.0–0 Qd7 12.Qe1 Rfe8 13.Qh4 Qe7 14.Ng5; 9.Bf5 ef5 10.0–0 Re8 11.Nd4 a6 12.Qf3 Nb6 13.d3 Ng4 14.Nd1) 9...Nc5 10.0–0 Qe7 11.Ne5 a6 12.a4 Bd3 13.Nd3 Nd3 14.Qd3; B6) 8...Qe7 9.Bf5 (9.0–0 Bd3 10.cd3 a6 11.Qc2 e5 12.fe5 Ne5 13.Nd4 g6 14.a4; 9.Qe2 Bd3 10.cd3 a6 11.0–0 e5 12.fe5 Ne5 13.Nd4 h5 14.a4; 9.Be2 Nc5 10.0–0 a6 11.ba6 Na6 12.Nb5 Nc5 13.Nd6 Qd6 14.d3) 9...ef5 10.0–0 g6 11.Qe1 Nc5 12.Qh4 Rfe8 13.a4 a6 14.Ba3; B7) 8...a6 9.0–0 (9.Qe2 ab5 10.Nb5 Nc5 11.0–0 Nfe4 12.Be4 Be4 13.d3 Bf5 14.Nfd4; 9.a4 ab5 10.Bf5 b4 11.Bh7 Kh7 12.Nb5 Be7 13.0–0 c6 14.Nbd4; 9.Be2 ab5 10.Nb5 Bc5 11.Nbd4 Qe7 12.0–0 Ne4 13.d3 Nd6 14.Qd2; 9.Bf5 ef5 10.0–0 ab5 11.Nb5 Nc5 12.Qe2 g6 13.Be5 Be5 14.fe5) 9...Nc5 10.Bf5 ef5 11.a4 g6 12.Qe1 ab5 13.ab5 Qe7 14.Qh4; C) 8.Be2= C1) 8...c5 9.0–0 (9.bc6 bc6 10.Rb1 Nc5 11.0–0 Rb8 12.Nd4 Qc7 13.Qe1 h6 14.Nf5) 9...h6 10.Rb1 Qb6 11.Na4 Qa5 12.c4 Bb1 13.Bc3 Qc7 14.Qb1; C2) 8...Nb6 9.Nd4 (9.0–0 Nc4 10.Bc4 dc4 11.Qe2 Bc2 12.Qc4 Bg6 13.a4 a6 14.Nh4) 9...Qd7 10.0–0 Bc5 11.d3 Qd6 12.a3 Bd4 13.ed4 h6 14.g4; C3) 8...Nc5 9.0–0 (9.Nd4 a6 10.ba6 Na6 11.Ncb5 Nc5 12.0–0 Na4 13.Qc1 Nb2 14.Qb2; 9.Nh4 a6 10.Nf5 ef5 11.a4 Qd7 12.0–0 Be7 13.ba6 Na6 14.Nb5; 9.d3 a6 10.0–0 ab5 11.Nb5 Na4 12.Bd4 Be7 13.Qd2 c6 14.Nc3; 9.a4 a6 10.Nd4 ab5 11.ab5 Qd7 12.Nf5 ef5 13.0–0 Rfe8 14.Bf3) 9...h6 10.Nd4 Bg6 11.Qe1 e5 12.fe5 Be5 13.Nf3 Bd6 14.Nd4; C4) 8...h6 9.0–0 (9.Nd4 Bg6 10.0–0 Nc5 11.Qe1 e5 12.fe5 Be5 13.Nf3 Bd6 14.Nd4; 9.Nh4 Bh7 10.0–0 Qe7 11.Nf3 e5 12.fe5 Ne5 13.Nd4 c5 14.bc6) 9...Qe7 10.Nd4 Bg6 11.f5 ef5 12.Nf5 Bf5 13.Rf5 Ne5 14.a4; C5) 8...Bc5 9.0–0 (9.Na4 Qe7 10.0–0 Ba3 11.Bd4 Nc5 12.c4 Rad8 13.Ne5 h6 14.Nc5; 9.a3 Ne4 10.0–0 Ndf6 11.Na4 Bb6 12.Nb6 ab6 13.d3 Nc5 14.Qd2; 9.a4 h6 10.0–0 Qe7 11.a5 a6 12.ba6 ba6 13.Nd4 Bd4 14.ed4; 9.Nd4 h6 10.Na4 Qe7 11.Nc5 Nc5 12.0–0 Na4 13.Nf5 ef5 14.Bd4; 9.Rc1 Qe7 10.0–0 h6 11.Bd3 Rfb8 12.Rb1 Bd3 13.cd3 a6 14.Qb3) 9...Qe7 10.a3 h6 11.Nd4 Bd4 12.ed4 Qd6 13.Na4 a6 14.ba6; C6) 8...Qe7 9.0–0 (9.Nd4 Bg6 10.0–0 h6 11.f5 ef5 12.Nf5 Bf5 13.Rf5 Ne5 14.Qf1; 9.Rb1 e5 10.0–0 Be6 11.fe5 Ne5 12.Nd4 h6 13.Qe1 Bd7 14.h3) 9...h6 10.Nd4 Bg6 11.Bd3 Bd3 12.cd3 a6 13.Qc2 Bc5 14.Nb3; C7) 8...Bb4 9.0–0 (9.a3 Be7 10.0–0 Nc5 11.Nd4 Qd7 12.g4 Be4 13.d3 Bg6 14.f5; 9.Rb1 Qe7 10.0–0 Nc5 11.a3 Ba5 12.Nd4 Nce4 13.Ne4 Ne4 14.Nb3) 9...Nc5 10.a3 Ba5 11.Nd4 Qd6 12.Qe1 h5 13.h3 Bg6 14.Qh4; C8) 8...a6 9.ba6 ba6 10.0–0 Rb8 11.Rb1 Nc5 12.Ne5 Qe8 13.d3 Na4 14.Ba1; C9) 8...e5 9.0–0 (9.Nh4 Be4 10.0–0 h6 11.Ne4 Ne4 12.Nf5 Qf6 13.Bg4 a6 14.Ng7) 9...ef4 10.Nd4 Bg6 11.ef4 Nb6 12.Kh1 Nc4 13.Qc1 Bh5 14.d3.

7.Nc3 a6 A) 8.ba6 A1) 8...0–0 9.ab7 (9.Be2 ba6 10.Rb1 Nc5 11.Nd4 Qd7 12.0–0 h6 13.Nf5 ef5 14.Rf3; 9.Rb1 ba6 10.Be2 Nc5 11.Nd4 h6 12.0–0 Qd7 13.Nf5 ef5 14.Rf3; 9.Nd4 Bg4 10.Be2 Be2 11.Qe2 Ra6 12.0–0 Nc5 13.Ncb5 c6 14.Nd6) 9...Ra7 10.Rb1 Rb7 11.Bb5 c5 12.0–0 d4 13.ed4 cd4 14.Nd4; A2) 8...ba6 9.Be2 (9.Rb1 0–0 10.Be2 Nc5 11.0–0 Rb8 12.Ne5 Qc8 13.Ba3 h6 14.Bb4; 9.Nd4 Nc5 10.Be2 0–0 11.0–0 Qd7 12.Rb1 Bg6 13.Nf3 Rab8 14.Ne5; 9.Nh4 Bg4 10.Be2 Rb8 11.Rb1 Be2 12.Ne2 0–0 13.Nf3 Nb6 14.Ne5; 9.Bd3 Rb8 10.Rb1 Nc5 11.Bf5 ef5 12.Nd4 Qd7 13.0–0 0–0 14.Ba3) 9...0–0 10.Rb1 Nc5 11.0–0 Rb8 12.Ne5 Qc8 13.Ba3 h6 14.Bb4; B) 8.Nd4 B1) 8...ab5 9.Nf5 (9.Ncb5 Nc5 10.Nd6 Qd6 11.Nb5 Qd7 12.Be5 Rc8 13.Na7 Bg4 14.Qb1) 9...ef5 10.Nb5 Nc5 11.Bd3 g6 12.0–0 0–0 13.Qe2 Nfe4 14.c4; B2) 8...Nc5 9.ba6 (9.Nf5 ef5 10.ba6 ba6 11.Be2 0–0 12.0–0 Rb8 13.Rb1 Qd7 14.Qe1) 9...ba6 10.Nf5 ef5 11.Qf3 Rb8 12.Rb1 0–0 13.Be2 Nce4 14.Nd1; B3) 8...Bg4 9.Be2 Be2 10.Qe2 0–0 11.0–0 ab5 12.Ndb5 Bc5 13.Rab1 Nb6 14.d3.

7.Nc3 Nc5 A) 8.Nd4 A1) 8...Qd7 9.Nf5 (9.Be2 0–0 10.0–0 h6 11.Qe1 Bg4 12.Bg4 Ng4 13.Ba3 Nf6 14.Rb1) 9...ef5 10.Qf3 Be7 11.Be2 0–0 12.0–0 a6 13.ba6 Na6 14.a4; A2) 8...Bg6 9.Be2 0–0 10.0–0 Re8 11.Qe1 e5 12.fe5 Be5 13.Qh4 Qd7 14.d3; A3) 8...Qe7 9.Be2 (9.Nf5 ef5 10.Be2 0–0 11.0–0 a6 12.a4 h6 13.Bf3 Qe6 14.Qe2; 9.d3 0–0 10.Be2 Bg6 11.Nf3 a6 12.0–0 Bh5 13.Qd2 h6 14.a4; 9.a4 0–0 10.Be2 Nce4 11.0–0 Nc3 12.Bc3 Bg6 13.Bd3 e5 14.fe5) 9...0–0 10.0–0 h6 11.Qe1 Bg6 12.Qh4 Qd7 13.Qh3 Rfe8 14.a4; A4) 8...Be4 9.Ne4 (9.d3 Bg6 10.Be2 Qd7 11.0–0 0–0 12.Qd2 h6 13.Nf3 Qe7 14.Ne5) 9...de4 10.Bc4 Na4 11.Qb1 0–0 12.0–0 Qd7 13.a3 e5 14.fe5; A5) 8...0–0 9.Be2 (9.Nf5 ef5 10.Be2 Be7 11.d4 Nce4 12.0–0 Qd7 13.Qd3 a6 14.a4) 9...a6 10.a4 ab5 11.ab5 Qd7 12.Nf5 ef5 13.0–0 Rfe8 14.Bf3; B) 8.a4 B1) 8...h6 9.Be2 (9.Nd4 Bg6 10.Be2 Qd7 11.Nf3 Qe7 12.0–0 0–0 13.a5 Bh5 14.Ne5) 9...0–0 10.0–0 Re8 11.Nd4 Bg6 12.Nf3 Qe7 13.a5 Bf5 14.Nd4; B2) 8...Qe7 9.Be2 (9.Nd4 0–0 10.Be2 Bg6 11.0–0 h6 12.Bg4 a6 13.Qe2 Ng4 14.Qg4) 9...0–0 10.0–0 h6 11.Nd4 Bg6 12.Qe1 e5 13.fe5 Be5 14.Qh4; B3) 8...Rc8 9.Be2 (9.Nd4 0–0 10.Be2 Qd7 11.Nf5 ef5 12.0–0 Rfe8 13.Bf3 c6 14.Ne2; 9.a5 0–0 10.Be2 Nfe4 11.Ne4 de4 12.Nd4 Qh4 13.g3 Qh3 14.Kf2; 9.Ra2 0–0 10.Be2 Re8 11.0–0 h6 12.Nd4 Bg6 13.Nf3 c6 14.Ne5) 9...0–0 10.Nd4 Bg6 11.0–0 Re8 12.Ba3 e5 13.fe5 Re5 14.a5; B4) 8...a6 9.Nd4 (9.ba6 Na6 10.Be2 0–0 11.0–0 Nc5 12.Nb5 h6 13.a5 Be7 14.Nbd4; 9.Be2 ab5 10.Nb5 0–0 11.0–0 Na4 12.Bd4 Qe7 13.Nd6 cd6 14.d3) 9...ab5 10.Nf5 ef5 11.ab5 0–0 12.Be2 Qd7 13.0–0 Rfe8 14.Bf3; B5) 8...Be7 9.Be2 (9.Nd4 0–0 10.Be2 h6 11.0–0 Qd7 12.Qe1 Bg6 13.Bf3 Rfe8 14.Qg3) 9...0–0 10.0–0 h6 11.Nd4 Qd7 12.Qe1 Rfe8 13.Bf3 Bg6 14.Qg3; B6) 8...a5 9.Be2 (9.Nd4 0–0 10.Be2 Bg6 11.0–0 h6 12.Qe1 Qd7 13.Qh4 e5 14.fe5) 9...0–0 10.0–0 Qd7 11.d3 h6 12.Qd2 Rfe8 13.Ba3 Qe7 14.Bb2; B7) 8...Qd7 9.Be2 (9.Ne5 Qe7 10.Be2 0–0 11.0–0 h6 12.a5 Nfd7 13.a6 ba6 14.Nc6; 9.Nd4 0–0 10.Be2 Bg6 11.0–0 a6 12.ba6 Na6 13.Qb1 c5 14.Nb3; 9.a5 0–0 10.Be2 Nfe4 11.Ne4 de4 12.Nd4 a6 13.0–0 Bg6 14.Bc4) 9...0–0 10.0–0 h6 11.a5 Rac8 12.Nd4 Bg6 13.Ba3 Nfe4 14.Ne4; B8) 8...h5 9.Be2 (9.Nd4 Bg6 10.Be2 h4 11.h3 Nh5 12.0–0 Ng3 13.Rf2 0–0 14.Bg4; 9.a5 h4 10.Nd4 Bg6 11.Nf3 Qe7 12.Na4 Ncd7 13.Nc3 h3 14.gh3) 9...h4 10.Nd4 0–0 11.Nf5 ef5 12.0–0 Re8 13.Rf3 d4 14.ed4; B9) 8...0–0 9.Be2 a6 10.Nd4 ab5 11.ab5 Qd7 12.Nf5 ef5 13.0–0 Rfe8 14.Bf3; C) 8.Be2 C1) 8...0–0 9.0–0 (9.Nd4 a6 10.ba6 Na6 11.Ncb5 Nc5 12.0–0 c6 13.Nd6 Qd6 14.d3; 9.a4 a6 10.Nd4 ab5 11.ab5 Qd7 12.Nf5 ef5 13.0–0 Rfe8 14.Bf3; 9.Nh4 Qd7 10.0–0 Rfe8 11.g4 Bg6 12.f5 ef5 13.gf5 Nce4 14.fg6) 9...h6 10.Nd4 Bg6 11.Qe1 e5 12.fe5 Be5 13.Qh4 Qd6 14.Nf3; C2) 8...h6 9.Nd4 (9.0–0 0–0 10.Nd4 Qd7 11.Nf5 ef5 12.Bf3 Be7 13.Qe2 a6 14.a4; 9.d3 0–0 10.0–0 a6 11.ba6 Na6 12.Nb5 Bc5 13.Nbd4 Nb4 14.Qd2; 9.Nh4 Bh7 10.Nf3 0–0 11.0–0 Qe7 12.d3 a6 13.ba6 Na6 14.Nb5; 9.a4 0–0 10.0–0 Qd7 11.a5 Rfc8 12.Ne5 Qe8 13.a6 ba6 14.d4) 9...0–0 10.Nf5 ef5 11.0–0 Re8 12.Bf3 c6 13.Rb1 Qa5 14.Qe1; C3) 8...Qd7 9.0–0 (9.Nd4 0–0 10.0–0 Bg6 11.Qe1 h6 12.Qh4 Rfe8 13.Qh3 a6 14.a4; 9.Nh4 0–0 10.Nf5 ef5 11.0–0 Be7 12.g3 a6 13.a4 d4 14.ed4; 9.d3 0–0 10.0–0 h6 11.Ne5 Qe7 12.Qe1 Ncd7 13.Qg3 Rad8 14.a3; 9.Ne5 Qe7 10.0–0 0–0 11.d3 h6 12.Qe1 Rfd8 13.Qg3 Rac8 14.Bf3; 9.a4 0–0 10.0–0 h6 11.a5 Rfd8 12.Ne5 Qc8 13.a6 ba6 14.d4) 9...0–0 10.a4 h6 11.a5 Rfe8 12.Ne5 Qe7 13.a6 ba6 14.d4; C4) 8...c6 9.Nd4 (9.0–0 Qc7 10.Nd4 0–0 11.Rb1 h6 12.Qe1 Rab8 13.Nf5 ef5 14.Rf3; 9.Rb1 0–0 10.0–0 h6 11.Nd4 Qd7 12.Nf5 ef5 13.Bf3 Be7 14.d3; 9.bc6 bc6 10.0–0 0–0 11.Rb1 Qc7 12.Nd4 Rab8 13.Nf5 ef5 14.Rf3; 9.Ne5 0–0 10.0–0 Qc7 11.Rb1 Rab8 12.Ba3 Nfd7 13.d4 Ne4 14.Bd6; 9.a4 0–0 10.0–0 h6 11.Nd4 Qd7 12.Qe1 Rab8 13.a5 a6 14.b6; 9.Nh4 0–0 10.0–0 Qa5 11.Nf5 ef5 12.Qe1 Rab8 13.Rb1 Ne6 14.Bd3; 9.Qc1 0–0 10.0–0 h6 11.Nd4 Qd7 12.Qe1 Rfe8 13.Qh4 a6 14.a4) 9...0–0 10.0–0 Qc7 11.Qe1 Rab8 12.Rf3 Bg6 13.Qh4 h6 14.a4; C5) 8...Qe7 9.Nd4 (9.0–0 0–0 10.Nd4 h6 11.Nf5 ef5 12.Qe1 Qe6 13.Qg3 c6 14.a3; 9.Nh4 0–0 10.0–0 h6 11.Nf5 ef5 12.Rb1 Qe6 13.Qc1 Be7 14.Qe1; 9.d3 0–0 10.0–0 a6 11.Qd2 h6 12.a4 Bg4 13.Ne5 Be2 14.Ne2; 9.a4 0–0 10.0–0 h6 11.a5 a6 12.Nd4 ab5 13.Ncb5 Bg6 14.Nd6) 9...0–0 10.0–0 h6 11.Nf5 ef5 12.Bf3 c6 13.Qe2 Rab8 14.Rab1; C6) 8...a6 9.Ne5 (9.0–0 ab5 10.Nb5 0–0 11.Nd6 Qd6 12.d3 Ng4 13.Qd2 Na4 14.Rab1; 9.ba6 Na6 10.0–0 Nc5 11.Nb5 0–0 12.Nd6 Qd6 13.Be5 Qe7 14.Qb1; 9.d3 0–0 10.0–0 ab5 11.Nb5 Na4 12.Be5 Be5 13.Ne5 Nd7 14.Qd2; 9.Nd4 ab5 10.Ncb5 0–0 11.0–0 Na4 12.Qc1 Nb2 13.Qb2 Ne4 14.d3; 9.Nh4 ab5 10.Nf5 ef5 11.Nb5 0–0 12.0–0 c6 13.Nd6 Qd6 14.Qe1; 9.d4 Nce4 10.Ne4 de4 11.Nh4 Nd5 12.Nf5 ef5 13.Qd2 ab5 14.Bb5) 9...ab5 10.Nb5 0–0 11.0–0 Ra4 12.Bd4 h6 13.d3 Nfd7 14.Nd6.

7.Nc3 g6 A) 8.Be2 A1) 8...Nc5 9.Nd4 (9.0–0 0–0 10.Nd4 h5 11.Bf3 Bg4 12.h3 Bf3 13.Qf3 a6 14.d3) 9...0–0 10.0–0 h5 11.Nf5 ef5 12.Qe1 Qd7 13.a4 Rfe8 14.Bf3; A2) 8...Qe7 9.Nd4 (9.0–0 0–0 10.Nd4 h6 11.g4 Be4 12.d3 e5 13.de4 de4 14.fe5) 9...0–0 10.0–0 Bc5 11.Na4 Ba3 12.g4 Bb2 13.Nb2 Be4 14.d3; A3) 8...a6 9.ba6 (9.0–0 ab5 10.Nb5 0–0 11.Nd6 cd6 12.d3 Bg4 13.Qd2 Qe7 14.Qb4; 9.Nd4 ab5 10.Ncb5 0–0 11.Nd6 cd6 12.0–0 Qb6 13.Nf5 Qb2 14.Rb1) 9...ba6 10.0–0 0–0 11.Rb1 Bg4 12.a4 Nc5 13.Ne5 Be2 14.Qe2; A4) 8...Bc5 9.0–0 (9.Na4 Be7 10.Nd4 Nc5 11.Nc5 Bc5 12.0–0 0–0 13.g4 Bg4 14.Bg4; 9.Nd4 Bd4 10.ed4 Qe7 11.a3 0–0 12.0–0 h5 13.h3 c5 14.bc6; 9.a4 0–0 10.0–0 Qe7 11.a5 a6 12.ba6 ba6 13.Na4 Rfb8 14.Nd4; 9.h3 0–0 10.0–0 Ne4 11.Ne4 Be4 12.Ng5 Nf6 13.Bd3 Bd3 14.cd3; 9.Nh4 0–0 10.0–0 Qe7 11.Nf5 ef5 12.Rf3 Nb6 13.Kh1 Rad8 14.Qf1; 9.a3 0–0 10.0–0 Qe7 11.Nd4 Nb6 12.g4 Ng4 13.Bg4 Nc4 14.Bf5) 9...0–0 10.Na4 Bg4 11.Nc5 Nc5 12.Qe1 Bf3 13.Bf3 a6 14.Bd4; A5) 8...Bb4 9.0–0 (9.Nd4 Bc5 10.Nf5 gf5 11.0–0 Rg8 12.Qe1 d4 13.Nd1 Nb6 14.c3; 9.a3 Bc5 10.0–0 0–0 11.Na4 Bg4 12.Bf6 Qf6 13.Ne5 Ne5 14.Nc5) 9...0–0 10.Nd4 Bc5 11.g4 Bd4 12.ed4 Ng4 13.Bg4 Qf6 14.Na4; A6) 8...0–0 9.0–0 (9.Nd4 Nc5 10.0–0 h5 11.d3 Bg4 12.Nf3 Qe7 13.Qd2 a6 14.a4) 9...Nc5 10.Nd4 h5 11.Nf5 ef5 12.Bf3 c6 13.Qe1 Re8 14.Qh4; B) 8.Bd3 B1) 8...0–0 9.0–0 (9.Qe2 Nc5 10.0–0 Bg4 11.h3 Nd3 12.cd3 Bf3 13.Qf3 a6 14.a4; 9.a4 Nc5 10.Bf5 ef5 11.0–0 a6 12.Qe1 ab5 13.ab5 Qe7 14.Qh4; 9.Bf5 ef5 10.0–0 Re8 11.Nd4 a6 12.Qe2 Nb6 13.ba6 Ra6 14.Rab1) 9...Qe7 10.Be2 Bb4 11.a3 Ba5 12.Nd4 Nc5 13.g4 Be4 14.d3; B2) 8...Bd3 9.cd3 0–0 10.0–0 a6 11.Qc2 Qe7 12.Rfe1 Nc5 13.a4 Rfd8 14.d4; B3) 8...a6 9.Bf5 (9.ba6 ba6 10.Bf5 gf5 11.0–0 Rg8 12.Rb1 Nc5 13.Nd4 Kd7 14.Ba3; 9.Be2 ab5 10.Nb5 Bc5 11.0–0 c6 12.Nbd4 0–0 13.Ne5 Re8 14.Nd7; 9.0–0 Bd3 10.cd3 0–0 11.a4 Qe7 12.Qb3 Nc5 13.Qc2 Rfd8 14.d4) 9...gf5 10.Qe2 Rg8 11.0–0 ab5 12.Nb5 Bc5 13.Be5 Bb6 14.a4; B4) 8...Qe7 9.a4 (9.Be2 0–0 10.0–0 Bc5 11.a3 Ne4 12.Ne4 Be4 13.Qc1 Nf6 14.c4; 9.0–0 0–0 10.Be2 Bc5 11.a3 Rfe8 12.Nd4 Nb6 13.g4 Ng4 14.Bg4; 9.Qe2 0–0 10.0–0 a6 11.Bf5 ef5 12.a4 Nc5 13.Qe1 ab5 14.ab5; 9.Bf5 gf5 10.0–0 Rg8 11.a4 Nc5 12.Qe2 Qf8 13.g3 Qh6 14.Ng5; 9.Nd4 Bd3 10.cd3 e5 11.fe5 Ne5 12.Qc2 0–0 13.0–0 a6 14.a4; 9.Ng5 0–0 10.0–0 Nc5 11.Bf5 ef5 12.Qe2 a6 13.a4 Rfe8 14.Ba3) 9...0–0 10.0–0 Nc5 11.Be2 a6 12.ba6 Na6 13.Nb5 Nc5 14.a5; B5) 8...Nc5 9.Bf5 (9.Qe2 0–0 10.0–0 Bg4 11.h3 Nd3 12.cd3 Bf3 13.Qf3 a6 14.a4; 9.Be2 0–0 10.0–0 a6 11.ba6 Na6 12.Nd4 Nb4 13.Ncb5 c5 14.a3) 9...gf5 10.0–0 Rg8 11.Qe2 Qe7 12.a4 a5 13.ba6 Ra6 14.Nb5; C) 8.Nd4 C1) 8...a5 9.ba6 (9.Be2 0–0 10.0–0 Bc5 11.g4 Be4 12.d3 Bb4 13.g5 e5 14.fe5; 9.Nf5 gf5 10.Be2 Nc5 11.0–0 Rg8 12.Qe1 Qe7 13.a4 0–0–0 14.Qh4) 9...Bg4 10.Qc1 ba6 11.h3 Bf5 12.g4 Be4 13.Nc6 Bh1 14.Nd8; C2) 8...Bg4 9.Be2 Be2 10.Qe2 Nc5 11.0–0 0–0 12.Ba3 a6 13.Bc5 Bc5 14.a4; C3) 8...Bc5 9.Nf5 (9.Na4 0–0 10.Be2 Ne4 11.0–0 Nb6 12.Nb6 ab6 13.g4 e5 14.Nf5; 9.Be2 Bd4 10.ed4 Qe7 11.a3 0–0 12.0–0 h5 13.h3 h4 14.Qe1) 9...gf5 10.Qf3 Rg8 11.Bd3 Bd6 12.0–0 Nc5 13.Kh1 Qd7 14.a4; C4) 8...a6 9.Nf5 (9.Be2 ab5 10.Ncb5 Bc5 11.0–0 c6 12.Nf5 gf5 13.Nd4 Rg8 14.Kh1; 9.ba6 Bg4 10.Qc1 ba6 11.h3 Bh5 12.g4 c5 13.Nf3 d4 14.Ne2) 9...gf5 10.ba6 ba6 11.Be2 Rb8 12.Rb1 Rg8 13.0–0 Nc5 14.Qe1; C5) 8...Nc5 9.Be2 h5 10.0–0 0–0 11.Rf3 Re8 12.a4 Bg4 13.Rf2 e5 14.fe5; C6) 8...0–0 9.Be2 (9.Nf5 ef5 10.Qf3 c6 11.Be2 Nc5 12.0–0 Nfe4 13.Rfd1 Qa5 14.Qh3) 9...Nc5 10.0–0 h5 11.a4 Qd7 12.Nf5 ef5 13.Bf3 c6 14.Ne2; C7) 8...h5 9.Be2 (9.Nf5 gf5 10.Qf3 Nc5 11.Be2 Qe7 12.Qh3 Rg8 13.0–0 0–0–0 14.a4; 9.h3 Nc5 10.Be2 0–0 11.0–0 Nce4 12.g4 hg4 13.hg4 Ng4 14.Bg4; 9.a4 h4 10.h3 Nc5 11.Be2 Kf8 12.0–0 Kg7 13.Nf5 gf5 14.Bf3; 9.Bd3 Nc5 10.Bf5 gf5 11.0–0 Rg8 12.d3 Ng4 13.Qd2 a6 14.h3) 9...Nc5 10.0–0 0–0 11.Rc1 Qd7 12.Qe1 Bg4 13.Nf3 Qe7 14.Rb1; C8) 8...Qe7 9.Be2 0–0 10.0–0 Bc5 11.Na4 Rad8 12.g4 Be4 13.d3 Ba3 14.g5; D) 8.h3 D1) 8...h6 9.Be2 (9.Nd4 0–0 10.Be2 Bb4 11.0–0 Nc5 12.g4 Bc3 13.Bc3 Nfe4 14.gf5; 9.g4 Be4 10.Ne4 de4 11.g5 hg5 12.Ng5 Nc5 13.Bg2 a6 14.ba6; 9.Nh4 0–0 10.Be2 Bb4 11.0–0 Nc5 12.a4 Nfe4 13.Nf5 ef5 14.Ne4; 9.Bd3 Nc5 10.Be2 0–0 11.0–0 a6 12.ba6 Na6 13.Nb5 Be7 14.Ne5; 9.Kf2 Nc5 10.d3 h5 11.Be2 Qe7 12.Qd2 a6 13.Nd4 ab5 14.Ndb5; 9.d3 e5 10.fe5 Ne5 11.Nd4 Bd7 12.Be2 0–0 13.0–0 a6 14.Qe1; 9.Rg1 Nc5 10.Nd4 0–0 11.d3 g5 12.Qf3 Bg6 13.0–0–0 a6 14.Kb1; 9.a4 0–0 10.Be2 Ne4 11.g4 Nc3 12.Bc3 Be4 13.d3 Bf3 14.Bf3) 9...0–0 10.0–0 Bb4 11.d3 h5 12.Nd4 Bc5 13.g4 Qe7 14.gf5; D2) 8...0–0 9.g4 (9.Be2 Ne4 10.g4 Nc3 11.Bc3 Be4 12.0–0 Nc5 13.Bd4 Qe7 14.d3) 9...Be4 10.g5 Nh5 11.Rg1 Bc5 12.Ne5 Ne5 13.Ne4 de4 14.Be5.

7.Bd3 Bg4 8.h3 Bf3 9.Qf3 (worse is 9.gf3 Nh5 10.h4 Nc5–/+) 9...e5 10.fe5 Ne5 11.Be5 Be5 12.Nc3 Qd6 13.0–0 0–0–0 14.Bf5 Kb8 15.d4 Bg3 16.Ne2 Bh4 17.Nf4 g6 18.Bd3 h5 19.g3 Bg5 20.a4 h4 21.g4 Rhe8 22.Rfe1 Ne4 23.a5 Re7 24.c4? (better is 24.a6+=) 24...Nd2–+ 25.Qg2? (25.Qf2 Nc4 26.Ng2 f5 27.gf5 gf5–+) 25...dc4 (better is 25...Re3! 26.Re3 Qf4–+) 26.a6 c5 27.Qd2 cd3 28.Qd3 cd4 29.Rad1 Bf4 30.ef4 Re1 31.Re1 Qf4 32.Re7 Qg3 (better is 32...ba6 33.ba6 Qg3 34.Qg3 hg3 35.Rb7 Ka8–+) 33.Qg3+= hg3 34.Rb7 Ka8 35.Rf7 d3 36.Rf1 d2 37.Rd1 Kb8 38.Kg2 Rd3 39.h4 Kc7 40.h5 gh5 41.gh5 Kb6 42.h6 Kb5 43.h7 Rd8 44.Kg3 Rh8 (44...Ka6? 45.Rd2 Rh8 46.Rh2+–) 45.Rd2 Rh7 46.Rd6 Rc7 47.Kf3 Rc6 48.Rc6 Kc6 49.Ke3 Kb5 50.Kd2 Ka6 51.Kc1 Kb5 52.Kb1 Kb4 53.Ka1 ½–½. Molano Lafuente,I (2110) – Villar,Ju (1965), 38th Barbera Open, 2015.

7.Nc3 Qe7

8.a4 A) 8...0–0 9.Be2 e5 10.fe5 Ne5 11.Nd4 Bd7 12.0–0 h6 13.Nf5 Bf5 14.Rf5; B) 8...Nc5 9.Be2 (9.Nd4 0–0 10.Be2 Bg6 11.0–0 e5 12.fe5 Be5 13.Qe1 h6 14.Qh4) 9...0–0 10.0–0 h6 11.a5 Bg4 12.Rb1 a6 13.ba6 Na6 14.Nb5; C) 8...h6 9.Be2 (9.Bd3 Bd3 10.cd3 g5 11.Ne2 gf4 12.ef4 Rg8 13.0–0 0–0–0 14.Qc2; 9.a5 0–0 10.Be2 Bb4 11.0–0 Nc5 12.Ne5 Qd6 13.a6 ba6 14.Rb1) 9...0–0 10.0–0 Bg6 11.a5 Nc5 12.Ne5 Bf5 13.a6 ba6 14.d4; D) 8...Rb8 9.Bd3 (9.Be2 0–0 10.0–0 Bc5 11.Bd3 Ne4 12.Qe2 h6 13.Nd4 Ndf6 14.Ne4; 9.Nh4 Bg4 10.Be2 h5 11.0–0 0–0 12.Nf3 Nc5 13.d3 c6 14.Qd2) 9...Bd3 10.cd3 0–0 11.0–0 e5 12.fe5 Ne5 13.Qe2 c5 14.a5; E) 8...Rc8 9.Bd3 (9.Be2 0–0 10.0–0 Nc5 11.Nd4 Bg6 12.Qe1 h6 13.Qh4 e5 14.fe5; 9.Nd4 0–0 10.Be2 Bc5 11.Nb3 Bb4 12.Nd4 Bc3 13.dc3 Nc5 14.0–0; 9.Nh4 Bg4 10.Be2 h5 11.0–0 0–0 12.Nf3 Nc5 13.d3 e5 14.fe5; 9.a5 0–0 10.Be2 Nc5 11.Nd4 Bg6 12.0–0 e5 13.fe5 Qe5 14.Rf4; 9.Rb1 0–0 10.Be2 h6 11.0–0 Bg6 12.a5 e5 13.fe5 Ne5 14.Nh4) 9...Bd3 10.cd3 0–0 11.0–0 e5 12.fe5 Ne5 13.Qb3 Nf3 14.Rf3; F) 8...Bb4 9.Bd3 (9.Be2 0–0 10.0–0 Nc5 11.d3 h6 12.Nd4 a6 13.Bf3 ab5 14.ab5; 9.Nd4 0–0 10.Be2 Bc3 11.dc3 Nc5 12.0–0 Be4 13.Ba3 Nfd7 14.c4; 9.a5 0–0 10.Be2 Nc5 11.0–0 Nfe4 12.Ne4 Ne4 13.a6 b6 14.Qe1) 9...0–0 10.0–0 Nc5 11.Bf5 ef5 12.Qe2 h6 13.Na2 a5 14.ba6; G) 8...Bg6 9.Bd3 (9.Be2 h6 10.0–0 0–0 11.a5 Nc5 12.Ne5 Bh7 13.a6 ba6 14.d4; 9.Nh4 e5 10.f5 Bh5 11.Be2 Be2 12.Qe2 0–0 13.0–0 Nc5 14.Ba3) 9...Nc5 10.Bg6 hg6 11.0–0 a6 12.Ng5 0–0 13.Qf3 ab5 14.Qh3; H) 8...g6 9.Nd4 (9.Be2 0–0 10.0–0 a6 11.ba6 ba6 12.Nd4 Bc5 13.g4 Bd4 14.ed4; 9.Bd3 0–0 10.0–0 Bd3 11.cd3 e5 12.d4 e4 13.Ne5 Qe6 14.Qb3; 9.Nh4 Bg4 10.Be2 Be2 11.Qe2 0–0 12.0–0 a6 13.d3 e5 14.f5) 9...0–0 10.Be2 Bc5 11.Nb3 Bb4 12.0–0 Nc5 13.Nd4 Qd6 14.g4; I) 8...e5 9.Nh4 (9.fe5 Ne5 10.Nd4 Bd7 11.Be2 0–0 12.0–0 h6 13.Nf5 Bf5 14.Rf5) 9...Bg6 10.fe5 Qe5 11.a5 0–0 12.Be2 Ne4 13.Nf3 Qh5 14.0–0.

8.Rb1 A) 8...0–0 9.Be2 Nc5 10.0–0 h6 11.Nd4 Bg6 12.Qe1 Qd7 13.Ba3 Rfe8 14.Qh4; B) 8...Nc5 9.Be2 0–0 10.0–0 h6 11.Nd4 Bg6 12.Qe1 Qd7 13.Ba3 Rfe8 14.Qh4; C) 8...h6 9.Be2 (9.Nd4 0–0 10.Be2 Bg6 11.0–0 Nc5 12.Qe1 Qd7 13.Ba3 Rfe8 14.Qh4; 9.Bd3 Bd3 10.cd3 Nc5 11.Qc2 a6 12.0–0 0–0 13.Ba3 ab5 14.Nb5) 9...Nc5 10.Nd4 Bg6 11.0–0 0–0 12.Qe1 Qd7 13.Ba3 Rfe8 14.Qh4; D) 8...Bg6 9.Be2 (9.Nh4 Bh5 10.Be2 Be2 11.Qe2 0–0 12.0–0 a6 13.a4 Nb6 14.Nf3; 9.Bd3 Nc5 10.Qe2 0–0 11.0–0 Nd3 12.cd3 Bh5 13.Ra1 Nd7 14.a4) 9...h6 10.0–0 0–0 11.Nh4 Bh7 12.Nf3 Nc5 13.d3 Bf5 14.Qe1; E) 8...e5 9.Nh4 (9.fe5 Ne5 10.Nd4 Bd7 11.Be2 0–0 12.0–0 g6 13.h3 Rfe8 14.Qe1) 9...Bg6 10.f5 Bh5 11.Be2 Be2 12.Qe2 0–0 13.0–0 a6 14.a3.

8.Rc1 0–0 (8...Nc5 9.Be2 a6 10.ba6 Na6 11.Nd4 0–0 12.Bf3 c6 13.0–0 Nc5 14.Nf5) 9.Be2 (9.Bd3 Bd3 10.cd3 e5 11.fe5 Ne5 12.Ne5 Be5 13.d4 Bd6 14.0–0) 9...h6 10.0–0 Bc5 11.Bd3 Rfe8 12.Rb1 Bd3 13.cd3 a6 14.Qb3.

8.Bd3 A) 8...0–0 9.Bf5 (9.0–0 Bd3 10.cd3 a6 11.Qc2 e5 12.fe5 Ne5 13.Qb3 c6 14.Ne5; 9.Qe2 Bd3 10.cd3 a6 11.0–0 Nc5 12.Nd4 ab5 13.Ncb5 h6 14.Nb3) 9...ef5 10.0–0 g6 11.Qe2 Nc5 12.a4 a5 13.Nd4 Rfe8 14.Qf3; B) 8...g6 9.0–0 (9.Qe2 0–0 10.0–0 Nc5 11.Bf5 ef5 12.Nd4 a6 13.a4 Rfe8 14.a5; 9.Be2 0–0 10.0–0 Bc5 11.a3 Bg4 12.Qe1 Bf5 13.Qd1 Ne4 14.Ne4; 9.Bf5 gf5 10.Nd4 Bc5 11.a3 Nb6 12.d3 Ng4 13.Qf3 Qh4 14.g3; 9.a4 0–0 10.0–0 Nc5 11.Be2 a5 12.Nd4 h5 13.Bf3 Bg4 14.h3; 9.Nd4 Bd3 10.cd3 e5 11.fe5 Ne5 12.Qc2 0–0 13.0–0 a6 14.a4; 9.Ng5 0–0 10.0–0 h6 11.Nf3 Nc5 12.Be2 a5 13.Nd4 a4 14.a3) 9...0–0 10.Qe2 Nc5 11.Ne5 a6 12.a4 Bd3 13.Nd3 Nd3 14.Qd3; C) 8...Bg6 9.Qe2 (9.0–0 0–0 10.Qe2 a6 11.Bg6 fg6 12.Ng5 ab5 13.Nb5 Nc5 14.Bd4; 9.Bg6 hg6 10.0–0 0–0–0 11.Qe2 Kb8 12.Rae1 e5 13.a4 Rde8 14.Qd1; 9.a4 0–0 10.0–0 Bd3 11.cd3 e5 12.d4 ef4 13.ef4 Qe6 14.Ne5) 9...0–0 10.0–0 a6 11.a4 Bd3 12.cd3 ab5 13.Nb5 Nc5 14.Bf6; D) 8...Bd3 9.cd3 a6 10.0–0 0–0 11.a4 e5 12.fe5 Ne5 13.Qb3 Nf3 14.Rf3.

8.Nd4 A) 8...Bb4 9.Bd3 (9.Be2 Bc3 10.Bc3 Ne4 11.Bf3 Nc3 12.dc3 Nf6 13.0–0 Be4 14.c4) 9...Bd3 10.cd3 Nc5 11.Qc2 a6 12.0–0 0–0 13.a4 ab5 14.ab5; B) 8...Bg6 9.Be2 (9.Bd3 e5 10.fe5 Qe5 11.g3 Nc5 12.Bg6 hg6 13.Qf3 0–0–0 14.0–0) 9...0–0 10.0–0 h6 11.Rb1 e5 12.fe5 Ne5 13.Qe1 Neg4 14.h3; C) 8...Nc5 9.Be2 (9.Nf5 ef5 10.Be2 0–0 11.0–0 a6 12.a4 h6 13.Bf3 Qe6 14.Qe2; 9.Rb1 0–0 10.Be2 a6 11.ba6 Na6 12.0–0 Nb4 13.Ncb5 Ne4 14.d3; 9.a4 0–0 10.Be2 Bg6 11.0–0 e5 12.fe5 Be5 13.Qe1 h6 14.Qh4) 9...0–0 10.0–0 h6 11.Qe1 Bg6 12.Qh4 Qd7 13.Qh3 Rfe8 14.a4; D) 8...h6 9.Nf5 (9.Be2 Bg6 10.0–0 0–0 11.f5 ef5 12.Nf5 Bf5 13.Rf5 Ne5 14.a4; 9.Bd3 Bd3 10.cd3 0–0 11.0–0 a6 12.Qc2 Bc5 13.Qb3 ab5 14.Ncb5; 9.Rb1 0–0 10.Be2 Bc5 11.Na4 Ba3 12.Ba3 Qa3 13.Nc3 Nc5 14.0–0; 9.a3 0–0 10.Be2 Bg6 11.0–0 e5 12.fe5 Ne5 13.Nf5 Bf5 14.Rf5) 9...ef5 10.Be2 Nc5 11.0–0 0–0 12.Qe1 Qe6 13.Qg3 c6 14.Bf3; E) 8...0–0 9.Be2 Bc5 10.a3 Bd4 11.ed4 Nb6 12.0–0 Nc4 13.Bc4 dc4 14.Qe2.

8.Be2 A) 8...Bg6 9.0–0 (9.Nh4 Nc5 10.0–0 0–0 11.Ng6 hg6 12.Bf3 a6 13.a4 Qd7 14.Qe2; 9.a4 h6 10.0–0 0–0 11.d3 e5 12.Qd2 ef4 13.ef4 Rfe8 14.Rae1; 9.Nd4 h6 10.0–0 0–0 11.a4 Nc5 12.Qe1 e5 13.fe5 Be5 14.Qh4; 9.d3 0–0 10.0–0 e5 11.Qd2 h6 12.Rfe1 Rfe8 13.Nh4 Bh7 14.Nf3) 9...h6 10.d3 0–0 11.Qd2 e5 12.Nh4 Bh7 13.Nf3 a6 14.a4; B) 8...Nc5 9.0–0 (9.Nd4 0–0 10.0–0 h6 11.Qe1 Bg6 12.Qh4 Qd7 13.Qh3 Rfe8 14.a4; 9.Nh4 0–0 10.0–0 h6 11.Nf5 ef5 12.Qe1 Qe6 13.Bf3 a6 14.a4; 9.a4 0–0 10.0–0 h6 11.a5 a6 12.Nd4 ab5 13.Ncb5 Rfe8 14.Nd6) 9...0–0 10.Nd4 h6 11.Qe1 Bg6 12.Qh4 Qd7 13.Qh3 a6 14.a4; C) 8...h6 9.Nd4 (9.0–0 Bg6 10.Rc1 0–0 11.Qe1 e5 12.fe5 Ne5 13.Nd4 c5 14.bc6; 9.Rb1 0–0 10.0–0 Bg6 11.Nd4 Nc5 12.Qe1 Qd7 13.Ba3 Rfe8 14.Qh4; 9.Rc1 0–0 10.0–0 e5 11.fe5 Ne5 12.Nh4 Bg4 13.Nf5 Bf5 14.Rf5; 9.a4 0–0 10.0–0 e5 11.a5 ef4 12.a6 ba6 13.Nd4 Bg6 14.Nc6; 9.Nh4 Bh7 10.0–0 0–0 11.Nf3 e5 12.fe5 Ne5 13.Nd4 Bg6 14.Qe1) 9...Bg6 10.0–0 0–0 11.f5 ef5 12.Nf5 Bf5 13.Rf5 Ne5 14.Qf1; D) 8...Bc5 9.Na4 (9.0–0 0–0 10.Na4 Ba3 11.Bd4 Ne4 12.d3 Nec5 13.Nc5 Nc5 14.Rb1; 9.a3 0–0 10.0–0 h6 11.Nd4 Bd4 12.ed4 Qd6 13.Na4 a6 14.ba6; 9.a4 0–0 10.0–0 a5 11.ba6 ba6 12.Rb1 Rfb8 13.Nh4 Rb4 14.d4; 9.Rc1 0–0 10.0–0 h6 11.Rb1 Nb6 12.Nh4 Rad8 13.d4 Bb4 14.Ra1; 9.Bd3 Qd6 10.Bf5 ef5 11.Qe2 0–0 12.0–0 Rfe8 13.Qd3 g6 14.Na4; 9.Rb1 0–0 10.0–0 h6 11.Na4 Ba3 12.Bd4 Bd6 13.Nc3 Nc5 14.Ne5; 9.Qb1 0–0 10.0–0 h6 11.Na4 Bb4 12.a3 Ba5 13.Bc3 Bc3 14.Nc3) 9...Ba3 10.Bd4 0–0 11.0–0 Nc5 12.c4 Rad8 13.Nh4 dc4 14.Nf5; E) 8...Bb4 9.Nd4 (9.0–0 0–0 10.a3 Ba5 11.Nd4 Nc5 12.Bf3 Bg6 13.Qe1 h6 14.Be2; 9.a3 Bd6 10.Nd4 0–0 11.0–0 Nc5 12.Qe1 Qd7 13.a4 Bg6 14.Qh4) 9...Bc3 10.Bc3 Ne4 11.0–0 Nc3 12.dc3 Be4 13.Qd2 0–0 14.c4; F) 8...Rc8 9.0–0 (9.Nd4 0–0 10.0–0 Bg6 11.Qe1 Nc5 12.Qh4 Qd7 13.Qh3 h6 14.d3; 9.Nh4 0–0 10.Nf5 ef5 11.0–0 Nc5 12.Rf3 c6 13.Rg3 g6 14.Rb1) 9...0–0 10.Nd4 Bg6 11.Qe1 Bc5 12.f5 ef5 13.Nf5 Qe6 14.Qf2; G) 8...Ba3 9.Ba3 (9.Qb1 Bc5 10.0–0 0–0 11.Na4 Bd6 12.Nd4 Bg6 13.Qc1 e5 14.fe5; 9.Qc1 Bc5 10.0–0 0–0 11.a4 Nb6 12.a5 Nc4 13.a6 Rab8 14.Nd4; 9.Rb1 Bb2 10.Rb2 0–0 11.0–0 Ne4 12.Ne4 Be4 13.Nd4 Qa3 14.Qc1) 9...Qa3 10.0–0 0–0 11.Nd4 Nc5 12.Qc1 Qa5 13.a4 Nce4 14.Ne4; H) 8...g6 9.0–0 (9.Nd4 0–0 10.0–0 Bc5 11.Na4 Qd6 12.g4 Be4 13.d3 Ba3 14.de4; 9.h3 h5 10.0–0 Nc5 11.Nd4 h4 12.a4 0–0 13.Nf5 gf5 14.Bf3; 9.Nh4 0–0 10.0–0 Nc5 11.Nf5 ef5 12.Bf3 Qe6 13.Qe2 a6 14.a4) 9...0–0 10.Nd4 Bc5 11.Na4 Ba3 12.g4 Be4 13.d3 Bb2 14.Nb2; I) 8...0–0= 9.0–0 (9.Nh4 Ba3 10.Nf5 ef5 11.Ba3 Qa3 12.0–0 Qd6 13.Bd3 g6 14.Ne2; 9.Rc1 Nc5 10.0–0 a6 11.d4 Nce4 12.ba6 ba6 13.Rb1 Rfb8 14.Ne4; 9.Rb1 h6 10.0–0 Bg6 11.Nd4 e5 12.fe5 Be5 13.Nf3 Rfd8 14.Ne5; 9.a4 a6 10.ba6 ba6 11.Rb1 Nc5 12.Nd4 Qd7 13.0–0 h6 14.Nf5; 9.Nd4 Bg6 10.0–0 h6 11.Bd3 Bd3 12.cd3 a6 13.Qc2 Bc5 14.Qb3; 9.a3 Nc5 10.0–0 a6 11.d4 Nce4 12.ba6 ba6 13.Ne5 Nc3 14.Bc3) 9...Nc5 10.Nd4 h6 11.Qe1 Bg6 12.Qh4 Qd7 13.Qh3 Rfe8 14.a4.

8.Ne2 Bg4 (8...0–0 9.Ng3–/+ (9.Ned4 Ne4 10.Be2 Bg6 11.0–0 e5 12.fe5 Ne5 13.g3 Bb4 14.c3) 9...Be4 10.Be2 e5 11.fe5 Ne5 12.0–0 Nf3 13.Bf3 Be5 14.Be5; 8...Be4 9.Ng3 0–0 10.Be2 e5 11.fe5 Ne5 12.0–0 Nf3 13.Bf3 Bg3 14.hg3; 8...Bg6 9.Ned4 (9.Ng3 0–0 10.Be2 Ne4 11.0–0 Ng3 12.hg3 f6 13.Bd3 Bh5 14.Be2) 9...0–0 10.Be2 Ne4 11.0–0 e5 12.fe5 Ne5 13.g3 Bb4 14.c3) 9.Ned4+= (9.h3 Bf3 10.gf3 Nh5 11.h4 0–0 12.Bg2 g6 13.a4 Rfe8 14.Rh3; 9.Nc3 e5 10.fe5 Ne5 11.Be2 Bf3 12.Bf3 Nc4 13.Nd5 Nb2 14.Ne7) 9...Ne4 10.Be2 e5 (10...0–0 11.0–0= Nb6 12.d3 Na4 13.de4 Nb2 14.Qe1) 11.fe5= Ne5 12.Ne5 Be5 (12...Be2 13.Qe2 Qe5 14.d3) 13.0–0 (13.Bg4 Qh4 14.g3) 13...h5 (13...Qb4 14.Bg4) 14.d3 Nd6 (14...Nc5 15.Bg4 hg4 16.Qg4+=) 15.Qd2 (15.Bg4 hg4 16.Qg4 Rh2=) 15...Rh6 16.Rae1 0–0–0 17.a4 Rg6 18.Bf3 Bf3 19.Rf3 Qh4 20.h3 Re8 21.Ref1 Qg5 22.R1f2 Bg3 23.Re2 Be5 24.Ref2 Bg3 25.Re2 Be5 ½–½. Bach,Mat (2305) – Berg,E (2600), Copenhagen DEN, Politiken Cup, 2011.

8.Nh4 A) 8...Bg4 9.Be2 Be2 10.Qe2 0–0 11.0–0 Nc5 12.Nf3 a6 13.a4 h6 14.d3; B) 8...0–0 9.Be2 (9.Nf5 ef5 10.Qf3 d4 11.Nd1 Rfe8 12.Bd4 Bc5 13.Bb2 Ne4 14.Bd3) 9...Ba3 10.Ba3 Qa3 11.Nf5 ef5 12.Bd3 g6 13.0–0 Qd6 14.Ne2; C) 8...Be4 9.d3 Bg6 10.Be2 d4 11.ed4 Bf4 12.0–0 Be3 13.Kh1 Bd4 14.Qd2; D) 8...d4 9.ed4 Be4 10.Ne4 Ne4 11.Qf3 Nd2 12.Kd2 Qh4 13.g3 Qf6 14.Qb7; E) 8...Bb4 9.Be2 (9.Nf5 ef5 10.a3 Bc3 11.Bc3 0–0 12.Bd3 Ne4 13.Be4 Qe4 14.0–0; 9.a3 Bc3 10.Bc3 Bg4 11.Nf3 0–0 12.Bd3 Ne4 13.Bb4 Ndc5 14.0–0; 9.Bd3 Bd3 10.cd3 Nc5 11.Qe2 a6 12.d4 Nce4 13.0–0 ab5 14.Qb5) 9...Bc3 10.dc3 0–0 11.0–0 Be4 12.Rc1 h6 13.Qd4 a6 14.ba6.

5.b5 Ne4?

6.Nf3 Qd6? 7.Ba3!?

6.Nf3 Qd6? 7.Be2 Nd7 8.0–0 Be7!? 9.c3?! (9.Bg7?! Rg8) 9...Bf6 (9...0–0? 10.Ba3) 10.a4 a6 11.Nd4! ab5 12.Nb5 Qb6 13.g4! Bg4 14.Bg4 c6 15.d3! Qe3 16.Kg2 cb5 17.Bc1 Nc3 18.Nc3 Qc5? (18...Qb6) 19.Nb5! Qb6 (19...Ba1? 20.Ba3!) 20.Ba3! Be7 21.Qc1 Kd8 (21...Ra4? 22.Nc7 Kd8 23.Be7!) 22.Be7 Ke7 23.Qa3 Kf6 24.Qc3 Ke7 25.f5 e5 26.Nc7 Ra5 27.Rab1 Qc5 28.Rb5 Rb5 29.ab5 Kd6 30.Rc1 Qc3 31.Rc3 Nf6 32.Be2 Nd7 33.Bf3 Nb6 34.Kg3?! (34.Nd5!? Nd5 35.Bd5 Kd5 36.Rc7+/–) 34...d4 35.Rc1 Rc8 36.Nd5 Rc1 37.Nb6 f6 38.Nc4 Kc5 39.Bb7 (39.b6?! Rc4! 40.dc4 Kc4 41.Bb7 Kc5=) 39...Kb5 40.Nd6 Kb4 41.Ne8 Ra1 ½–½. Schiffler – Bieber, corr 1951.

6.Nf3 Nd7 7.Be2 Bc5 8.0–0 =+.

6.Nf3 Nd7 7.Be2 Ndf6 8.0–0= Be7 9.Ne5 h6 10.d3 Nc5 (10...Nd6 11.Nc3=) 11.g4+= Bh7 12.g5 Na4 13.Bd4 Ng8 14.c4 Nb6 15.c5 Nc8 16.c6 b6 17.Nd7 (17.Bh5!? Nd6 18.g6 fg6 19.Ng6 (19.Bg6?! Bg6 20.Ng6 Rh7+/–) 19...Bg6 20.Bg7+– (20.Bg6?! Kf8+/–)) 17...Bf8 (17...hg5 18.Bg7 gf4 19.Bh8 fe3 20.Rf7 Kf7 21.Bh5 Bg6 22.Qg4 Bg5 23.Ne5 Ke7 24.Ng6 Kf7 25.Nf4 Kf8 26.Qe6 Qe7 27.Ng6 Ke8 28.Ne7 Kd8 29.Qd7) 18.Bh5 Nd6 19.Ne5 (better is 19.Nf8 Kf8 20.gh6 Nh6 21.Na3=) 19...hg5=+ 20.Bf7 (20.Nc3!?=+) 20...Nf7–/+ 21.Nf7 Kf7 22.Qh5 Ke7 23.fg5 Qe8–+ 24.Qh4 Kd8 25.Rf8 Qf8 26.g6 Qe7 27.Qh7?? Qg5–+ 28.Kh1 Qf5 (29.Kg1 Rh7 30.gh7 Qh7–+) 0–1. Kucharkowski,Jens – Bakkers,Max, corr SOK–91–76, 1991.

6.Nf3 Nd7 7.Be2 Ndf6 8.0–0 h5 9.a4 h4 10.d3 Bc5 11.Bd4 (11.de4 Be3 12.Kh1 Ne4=+) 11...Bd4= 12.Nd4 Ng3? (12...Nd6=) 13.Nf5?? (13.hg3 hg3 14.Nf5 ef5 15.Re1–/+) 13...ef5 (13...Nf5 14.Qd2=+) 14.Rf3 Ng4 (14...Ne2!? 15.Qe2 h3=) 15.hg3+= hg3 16.Rg3 Qh4 17.Rg4 fg4 18.Bg4 Qg3 19.Qe2 (better is 19.Bf3+/–) 19...Rh4=+ 20.Bf3? 0–0–0–+ (20...0–0–0 21.Qd2 d4–+) 0–1. Cottarelli,Franco – Scalisi,Salvatore, corr, 1971.

6.Nf3 f6 7.Be2 Nd7 8.0–0 Bb4 9.c4 (9.Nd4!? Qe7 10.c4 dc4 11.Bc4+=) 9...dc4= 10.Bc4 Nb6 11.Be2 Na4?? (better is 11...Nd5=) 12.Qa4+– Bd2 (12...Bc5 13.g4! Bg6 14.f5 ef5 15.gf5 Bf5 16.Nh4+–) 13.Nbd2 (better is 13.Bd4!? Bg4+–) 13...Nd2 14.Rfe1 (14.Rfd1!? Nf3 15.Bf3 Qc8+–) 14...Nf3 (14...Ne4 15.Rac1 0–0 16.Nd4+–) 15.Bf3 (15.gf3?! 0–0+–) 1–0. De Oliveira,Carlos A – Zeituni,Carlos Alberto, CXEB TBI–C–XI–XII–P–0068, 1993.

5.b5 Be7

6.Nf3 c5 7.Be2 Ne4 (7...0–0 8.0–0=+) 8.0–0 (8.d3 Bf6 9.Bf6 Nf6=) 8...Bf6=+ 9.Qc1 0–0 10.a4 (10.d3 Nd6 11.c4 dc4 12.dc4 Ne4=+) 10...a6 (10...c4 11.Nd4=+) 11.Na3 (11.d3 Nd6 12.Nc3 d4–/+) 11...Nd7=+ 12.c4 (12.Bf6 Qf6 (< 12...gf6 13.ba6 ba6 14.Rb1=) 13.a5 ab5 14.Nb5 c4=) 12...Qa5 (12...ab5 13.ab5 Nd6 14.d3=+) 13.Bf6 Ndf6 (< 13...gf6 14.cd5 ed5 15.ba6 ba6 16.d3=) 14.Nb1 (14.ba6 Qa6 15.d3 Nd6 16.cd5 Rfc8 17.de6 Be6+=) 14...Nd6 (14...ab5!? 15.d3 Nd6 16.cb5 Rfc8–/+) 15.ba6 (15.cd5 Nd5 16.Qc5 Nb5=) 15...ba6=+ 16.cd5 ed5 17.Qc3 Qb4 (17...Qc3 18.Nc3 Rfb8 19.Kf2–/+) 18.Qe5=+ Qb8 (better is 18...c4=+) 19.Ra2?? (19.Nc3 Re8 20.Rab1 Qd8 (20...Re5?! 21.Rb8 Re8 22.Re8 Nde8 23.Rc1=; 20...Bb1?! 21.Rb1 Qd8 22.Qg5–+) 21.Nd5 Re5 22.Nf6 gf6 (< 22...Qf6 23.fe5 Qg6 24.Rb6–+) 23.fe5 Bb1 24.Rb1 fe5 25.Ne5 Qe8–+) 19...d4?? (19...Bb1 20.Rb2 Nd7 21.Rb8 Ne5 22.Rf8 Kf8 23.fe5 Ne4 24.Rb1 c4+–) 20.Na3 Nd7 21.Qe7 Re8 22.Qh4 de3 23.Nc4 (23.de3 Qb3 24.Rfa1 Qe3 25.Kh1 Re4–+) 23...Nc4 24.Bc4 Qb4 25.Bd5 e2 (25...Bb1 26.Ra1 Rab8 27.de3–/+) 26.Re1 Rab8 27.Raa1 (27.Qh5 Bg6 28.Qh3 Nf6–+) 27...Nf6 (27...c4 28.Kh1–+) 28.Ba2 (better is 28.Bc6 Re6 29.Qg5–+) 28...Bd3 29.h3 c4 (30.Ne5 Ne4–+; 29...Qa4?? 30.Bf7 Kf7 31.Ra4+–) 0–1. Platt,RJ – Goosey,RW, corr BPCTC, 1996.

6.Nf3 Nbd7 7.Be2= 0–0 8.0–0 h6 (8...Ne4 9.d3 Nd6 10.Nc3=+) 9.Ne5 (9.Nd4 Bh7=) 9...Ne8 10.c4 f6 (10...dc4!? 11.Nc4 a6 12.ba6 Ra6=) 11.Nf3+= Bg6 (11...dc4 12.Nd4 Nb6 13.a4+=) 12.Nd4 Bf7 13.cd5 ed5 14.f5 Ne5 15.Bh5 Nd6 16.Nc3 c6 17.Bf7 Rf7 18.bc6 bc6 19.Nce2 c5 20.Nb3 Ndc4 21.Qc2 Rb8 22.Be5 fe5–/+ 23.g4 a5 24.a4 Rb3! 25.Qb3 Nd2 26.Qb5 Nf1 27.Rf1 Bf8 28.Qd3 c4 29.Qd1? Bc5 30.Rf3 Rd7 31.Qe1 Qg5 32.Qg3 d4?? 33.ed4?? ed4–+ (33...ed4 34.Qe5 Qg4 35.Kf2 Qh4 36.Kg2 Qe7 37.Qe6 Qf7–+) 0–1. Ulaneo,Ruben – Rodriguez,Santiago, Melo Interdepartamental, 1999.

6.Nf3 0–0

7.Nc3 c5 8.bc6 Nc6 9.Be2 =+.

7.Nc3 Nbd7 8.Ne2 (8.Be2 Ne4=) 8...Nc5 9.Ng3 Bg6 (9...Bg4 10.Be2=+) 10.Ne5= Nce4 (10...a6 11.Ng6 fg6 12.ba6 Na6 13.Be2=) 11.Ng6 hg6 (11...fg6 12.Ne4 Ne4 13.Qg4=) 12.Qf3 Qd7 (12...g5 13.Ne4 Ne4 14.f5=) 13.Bd3 (13.Be5 Bd6=) 13...Nc5 (13...Rad8 A) < 14.Ne4 de4 (14...Ne4?! 15.h4=) 15.Be4 Qd2 16.Kf1 Qb4–/+; B) 14.Be4?! Ne4 15.Be5 Ng3 16.hg3 Qb5=+; C) 14.Bd4=) 14.Be2 Rfd8 (14...a6 15.Rb1=) 15.0–0 Nce4 16.Rfd1 Ng3 17.Qg3 Ne4 18.Qf3 Bb4 19.d3 (19.c3 Be7+=) 19…Nc3= ½–½. Kamenik,Petr – Polak,Benedikt, Czech Fed–ch U14, 1997.

7.Nd4=+.

7.Be2 a6 8.a4 c5 9.c4 (9.0–0 Nfd7=+) 9...ab5 10.ab5 Ra1 11.Ba1 Qa5 12.Nc3 Nbd7 13.0–0 Nb6 14.cd5 ed5 (< 14...Nfd5 15.e4 Be4 16.Ne4+–) 15.Kh1 Rd8 16.Qb3 (16.d3 Qb4=+) 16...d4–/+ 17.ed4 cd4–+ 0–1. spblex (2545) – eik (2545), net–chess.com, 2009.

7.Be2 Nbd7 8.0–0 Nb6 9.Nd4 Bg6 (9...Na4 10.Ba3=) 10.f5 Bf5 11.Nf5 ef5 12.Rf5 Qd7 13.Qf1 Ne4 14.a4 (14.Qf3 Nd6 15.Rf4 Nb5+=) 14...Qd6 (14...Nc4 15.Bc4 dc4 16.d3=) 15.a5 Nc8 (15...Nc4 16.Bc4 dc4 17.Ba3+/–) 16.Ba3 (16.a6 Rb8+/–) 16...c5+= 17.c4 White gets strong initiative 17...dc4 18.Bc4 Bf6 19.Ra2 Ne7 20.Rf4 Ng5 21.d4 b6 22.dc5 bc5+= 23.Rd2 Qc7 24.h4 Ne6 25.Rf6 gf6 26.Qf6 Rad8 27.Bb2 Ng6 28.h5 Rd2 29.Nd2 Qg3 30.Nf3 Nd4? 31.ed4 Nf4 32.Qg5 Qg5 33.Ng5 (33...cd4 34.Bd4+–) 1–0. Psion – Psion, 1989.

7.Be2 h6 8.0–0 c5 9.c4 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.d3 Qc7 14.Ne5 dc4 15.Nc4 Ra8 16.Nbd2 Ne8 17.Qb3 Bf6 18.Bf6 Nef6 (< 18...gf6 19.b6 Qb8 20.Bf3+/–) 19.h3 Bh7 20.Qb2 Nb6 21.Nb6 Qb6 22.Nc4 Qa7 23.Rb1 Nd5 24.g3 Nb6 25.Rc1 Nc4 26.Rc4 b6 27.Rc2 Qd7 28.Rc3 Bg6 29.Bf3 Ra5 30.Rb3 (better is 30.Bc6!? Qd6 31.Qd2=) 30...Bd3–/+ 31.Be2? (31.Bc6!? Qd8 32.Qd2–/+) 31...c4 32.Rb4?? (better is 32.Bd3 cb3 33.Qb3–+) 32...c3! 33.Qc3 Be2 34.Rd4 Qb5 35.Rd8 Kh7 36.Qc2 f5 37.Qc8 Bc4 (38.Rh8 Kg6 39.Qe8 Qe8 40.Re8 Ra1 41.Kf2 Rh1–+) 0–1. Struck,Bernd Dieter (1980) – Josting,Friedel (1785), GER–ch, 2000.

6.Nf3 a6

7.Nd4 =+.

7.a4 ab5

8.ab5 Nbd7

9.Be2 Ra1

10.Ba1 Qa8

11.Bb2 0–0 A) 12.Nd4 Qa5 (12...Qa4 13.Nf5 ef5 14.c4 Qa2 15.Qc1 Ne4 16.cd5 Qd5 17.0–0 Ndc5; 12...Bc5 13.Nf5 ef5 14.c4 Qa2 15.Bf6 Nf6 16.Nc3 Qa5 17.Qa4 Qa4) 13.0–0 Ra8 14.g4 Qa2 15.gf5 Qb2 16.fe6 fe6 17.Ne6 Nc5; B) 12.Nc3 Qa5 (12...Bc5 13.0–0 Qa5 14.Nh4 Qb4 15.Nf5 ef5 16.Qc1 Ra8 17.d4 Be7; 12...Ba3 13.Qc1 Bc5 14.0–0 Qa7 15.Nh4 d4 16.ed4 Bd4 17.Kh1 Bg4; 12...Nb6 13.0–0 Qa5 14.Ne5 Qb4 15.Qc1 h5 16.Nd3 Qd6 17.Ne5 Ra8) 13.0–0 Qb4 14.Qb1 Ra8 15.Nd4 Nb6 16.Nf5 ef5 17.Bc1 Qd6; C) 12.Nh4 Qa5 (12...Qa2 13.Nf5 ef5 14.Qc1 Ne4 15.Nc3 Nc3 16.Bc3 Bh4 17.g3 Bf6; 12...Bc5 13.Nf5 ef5 14.0–0 Qa4 15.c4 Qd1 16.Rd1 Ra8 17.cd5 Nd5; 12...Be4 13.Nc3 Qa5 14.0–0 Bc5 15.f5 Qb4 16.Qc1 Bc2 17.d4 Bb3; 12...Qa7 13.Nf5 ef5 14.0–0 Bc5 15.d4 Bb4 16.Nc3 Bc3 17.Bc3 Ne4; 12...Qa4 13.Nf5 ef5 14.c4 Qd1 15.Kd1 dc4 16.Bc4 Nb6 17.Be2 Ne4) 13.0–0 Ra8 14.Nc3 Qb4 15.Nf5 ef5 16.Qc1 Nb6 17.Bf3 Nc4; D) 12.Qc1 Qa4 (12...Qa5 13.0–0 Ra8 14.Nd4 Bg4 15.Bg4 Ng4 16.Nc3 Bc5 17.h3 Bd4; 12...Nc5 13.0–0 Qa5 14.Nd4 Ra8 15.Nf5 ef5 16.c4 Nce4 17.Bf6 Nf6; 12...Bc5 13.0–0 Qa7 14.Nc3 Ra8 15.Nh4 Bg4 16.Qd1 h5 17.h3 Be2; 12...Qa7 13.0–0 Bc5 14.Nc3 Ra8 15.Nh4 d4 16.ed4 Bd4 17.Kh1 Bg4; 12...c5 13.Nc3 Qa7 14.Nh4 Bg4 15.Nf3 d4 16.Nd1 Qa5 17.0–0 Ne4; 12...Ne4 13.Nc3 Qa5 14.Ne4 Be4 15.0–0 h6 16.c4 Ra8 17.d3 Bh7; 12...Nb6 13.Nc3 Qa5 14.0–0 Ra8 15.Bd3 Qb4 16.Ne5 h6 17.Rf3 Ne4) 13.Nd4 Bg4 14.Nc3 Qb4 15.0–0 Bc5 16.h3 Be2 17.Nce2 Ra8; E) 12.0–0 Qa4 (12...Qa5 13.Nd4 Ra8 14.Nc3 Qb4 15.Qb1 Nb6 16.Ba1 Qc5 17.Qc1 h6; 12...Bc5 13.Nd4 Qa2 14.Qc1 Bd4 15.Bd4 Bc2 16.Nc3 Qb3 17.Qa1 Rb8; 12...Qa2 13.Qc1 Qa5 14.Nd4 Bg4 15.Bg4 Ng4 16.Nc3 Ra8 17.h3 Ngf6) 13.Nc3 Qc2 14.Qc2 Bc2 15.Nd4 Bg6 16.f5 ef5 17.Nf5 Bf5.

11.Bb2 Qa2 12.Qc1= Ne4 (12...0–0 13.Nc3 Qa5 14.Nd4 Bg4 15.Bg4 Ng4 6.0–0 Bc5 17.Nb3 Qa7; 12...Qa5 13.Nc3 Bc5 14.0–0 0–0 15.Nd4 Bd4 16.ed4 Ra8 17.Nd1 h6; 12...Nc5 13.Nc3 Qa5 14.Nd4 0–0 15.Nf5 ef5 16.Qa1 Qa1 17.Ba1 Ra8; 12...Qa7 13.Nd4 0–0 14.Nf5 ef5 15.c4 Ra8 16.cd5 Nd5 17.0–0 Qb6; 12...Bb4 13.0–0 0–0 14.Nc3 Bc3 15.Bc3 Bc2 16.Nd4 Bf5 17.Bb4 Rc8) 13.0–0 0–0 14.d3 Nd6 15.Nc3 Qa7 16.Qd2 Bf6 17.Ra1 Qb6.

11.Bb2 Qa5 A) 12.0–0 0–0 (12...Bc5 13.Nd4 0–0 14.Nf5 ef5 15.c4 Ra8 16.cd5 Nd5 17.Nc3 Nc3; 12...Qb4 13.Bc3 Qd6 14.Be5 Qc5 15.Nd4 0–0 16.Nf5 ef5 17.Bd4 Qb4; 12...Nc5 13.Nd4 Na4 14.Nf5 Nb2 15.Qc1 ef5 16.Qb2 0–0 17.Qe5 Bb4) 13.Nd4 Bc5 14.Nf5 ef5 15.c4 dc4 16.Bc4 Ne4 17.Qc2 Nb6; B) 12.Nc3 Qb4 (12...0–0 13.Nd4 Qb4 14.Qb1 Ra8 15.0–0 Bc5 16.Nf5 ef5 17.Ba1 Qb1; 12...Bc5 13.Nh4 0–0 14.Nf5 ef5 15.Qa1 Qb4 16.Bd3 Re8 17.Ne2 Re3; 12...Nb6 13.Nd4 0–0 14.0–0 Qb4 15.Nf5 ef5 16.Ba1 Ra8 17.Bd3 d4) 13.Qa1 0–0 14.Nd4 Nb6 15.0–0 Ra8 16.Qc1 Nc4 17.Bc4 Qc4; C) 12.Qc1 Nc5 (12...0–0 13.0–0 Ra8 14.Nd4 Bg4 15.Bg4 Ng4 16.Nc3 Bc5 17.Qd1 Bd4; 12...Bg6 13.Nc3 0–0 14.0–0 Bc5 15.Nh4 Bh5 16.Qa1 Qb4 17.Bh5 Nh5; 12...h6 13.Nd4 0–0 14.Nc3 Ra8 15.0–0 Qb4 16.Nf5 ef5 17.Bd3 g6; 12...Bc5 13.Nd4 0–0 14.Nb3 Qb6 15.Nc5 Nc5 16.Bf6 gf6 17.Nc3 Qd6; 12...Ne4 13.Nc3 0–0 14.0–0 Ra8 15.Ne4 Be4 16.Nd4 Bb4 17.c3 Bc5; 12...h5 13.0–0 0–0 14.Nc3 Bc5 15.Nd4 Bd4 16.ed4 Ra8 17.Nd1 Bg4) 13.0–0 0–0 14.Nc3 Ra8 15.Nd4 Qb4 16.Nf5 ef5 17.Rf3 Nce4; D) 12.Nd4 0–0 13.Nc3 Ra8 14.0–0 Qb4 15.Qb1 Bc5 16.Nf5 ef5 17.Ba1 Qb1.

11.Bb2 c5 12.Nh4= (12.Nc3 h6 (12...0–0 13.0–0 d4 14.ed4 cd4 15.Nb1 Rc8 16.Nd4 Bc5 17.Kh1 Bd4; 12...Ne4 13.Ne4 de4 14.Ng5 0–0 15.g4 Qa2 16.Bg7 Kg7 17.gf5 ef5; 12...h5 13.Nh4 d4 14.Nf5 ef5 15.Nb1 Qa2 16.Qc1 0–0 17.0–0 Re8; 12...Qa5 13.Nh4 d4 14.Nf5 ef5 15.Nb1 de3 16.0–0 Nb6 17.Bc3 Qa4) 13.0–0 0–0 14.Bd3 Bd3 15.cd3 Qa5 16.Qc2 Ra8 17.Ra1 Qd8; 12.0–0 Qa4 (12...Qa2 13.Qc1 Qa4 14.c4 dc4 15.Qc4 Qc4 16.Bc4 0–0 17.Nc3 Ra8) 13.c4 Qd1 14.Rd1 0–0 15.d3 Ra8 16.Nc3 d4 17.ed4 cd4) 12...Qa2 13.Nf5 (13.Qc1 Bg4 14.Nc3 Qa5 15.Nf3 0–0 16.h3 Bh5 17.0–0 Ra8) 13...Qb2 14.Ng7 Kf8 15.Nh5 Nh5 16.Bh5 Qb5 (16...Bf6= 17.0–0 Ke7; 16...Rg8 17.0–0 Nf6) 17.d3 (better is 17.Nc3!? Qa6+= (17...Qb2 18.0–0=)) 17...Nf6+= (17...d4+=) 18.Bf3 Kg7 19.Nd2 Ra8 20.Qb1 Qb1 21.Nb1 Ra1 (21...b5 22.g4–/+) 22.Ke2 b5 23.g4 c4 (23...b4 24.g5 Ne8 25.Nd2–/+) 24.Nc3 Rh1–/+ 25.Bh1 cd3 26.cd3 Ng4 27.Nb5 Nh2–/+ 28.f5 Kf6 29.fe6 fe6 30.Nd4 h5 31.e4 de4 32.Be4 Ng4 33.Nf3 Bd6 34.Kf1 Ne3 35.Ke2 Nf5 36.Kf2 Bf4 37.Kg2 Nd6 38.Bc6 Bg5 39.Kh3 Nf5 40.Be4 Ne3+= 41.Kg3 Nd1 42.Kh3 Nf2 43.Kg3= Ne4 44.de4 Kg6 45.Nd4 Kf7 46.Ne6 Ke6 ½–½. Rabbitte,L (2030) – Burnett,J (2190), Sheffield ENG, 2011.

11.Bb2 Nc5 A) 12.Nd4 Na4 (12...Qa2 13.Qc1 Bg4 14.Nc3 Qa5 15.Bg4 Ng4 16.0–0 0–0 17.Qd1 h5) 13.Ba1 0–0 14.0–0 Ne4 15.d3 Nd6 16.Nc3 Qa5 17.Na4 Qa4; B) 12.Nc3 Nfe4 (12...Qa7 13.0–0 0–0 14.Nd4 Ra8 15.Nf5 ef5 16.Qa1 Qb8 17.Qe1 Qe8; 12...0–0 13.Nd4 Qa7 14.Nf5 ef5 15.Qa1 Qa1 16.Ba1 Ra8 17.Bb2 Ra5; 12...Nce4 13.0–0 0–0 14.d3 Nc3 15.Bc3 Qa7 16.Nd4 Ra8 17.Qd2 Qb6; 12...Qd8 13.Nd4 0–0 14.0–0 Qd6 15.Qa1 Bg4 16.Bg4 Ng4 17.Qa7 Bf6; 12...Qc8 13.Nd4 0–0 14.0–0 h6 15.Qa1 Bg4 16.Bg4 Ng4 17.Qa5 Rd8; 12...Qa5 13.Nd4 0–0 14.0–0 Nce4 15.Qa1 Qa1 16.Ra1 Nd2 17.Rd1 Nc4; 12...h5 13.Nd4 Bg4 14.0–0 Qa5 15.Qa1 Qa1 16.Ra1 Kd7 17.Nf3 Bd6; 12...h6 13.Nd4 0–0 14.0–0 Bh7 15.Qa1 Bg6 16.d3 Bd6 17.Bf3 Qe8; 12...Bd6 13.0–0 0–0 14.Nd4 Re8 15.Bf3 Bg6 16.Qe2 Qd8 17.Ba3 Qd7) 13.b6 c6 14.Ne4 Be4 15.0–0 0–0 16.d3 Bf5 17.Qc1 Qa6.

6.Nf3 h6

7.Be2= 0–0 8.0–0 Nbd7 9.a4 c6 10.Nd4+= Qc7 11.Nf5 ef5 12.Bd3 g6 13.Be2 Rac8 14.Na3 Rfe8 15.c3 Ne4 16.Nc2 c5 17.d3 Nd6 18.c4 (18.Na3 Bf6 19.Bf3 c4 20.Bd5 Nb6 21.dc4 Re3=+) 18...dc4=+ 19.dc4 Bf6 (19...Ne4 20.a5=) 20.Qc1 (20.Bf6 Nf6 21.a5 Rcd8=+) 20...Ne4 21.Rd1 Bb2 22.Qb2 Ndf6 23.Rd3 Rcd8 24.Rad1 Rd3 25.Rd3 Rd8 26.Ne1 Rd3 27.Nd3 Qd6 28.a5 Nd7 29.Kf1 Qe6 30.Ne1 Nd6 31.Qc3 Nf6 32.Qe5 Nc4–/+ 33.Qe6 Nd2 34.Kg1 fe6 35.Nd3 b6 36.Nc5? ba5?? 37.Ne6 a4 38.Nd4 a3–/+ 39.Kf2 a2 40.Nc2 Kf8 41.Na1 Nfe4 42.Ke1 Ke7 43.Kd1 Kd6 44.Kc2 Kc5 45.Kb2 Nc4 46.Bc4 Kc4 47.Ka2 Nc3 48.Ka3 Nb5 49.Kb2 Kd3 50.Nc2 Nd6 51.Kb3 Ne4 52.g3 Nd2 53.Kb2 Nc4 54.Kc1 Ne3 55.Nb4 Ke2 56.Nc6 Nd5 57.Na7=+ Kf2 58.Kd2 Kg2 59.Ke2 Nc3 60.Ke3 Kh2 61.Kf3 Ne4 62.Nc6? Ng3 63.Ne7 Kh3 64.Ng6 h5 65.Ne7 h4 66.Ng6 Ne4 67.Ne5 Nd2 68.Kf2 Ne4?? 69.Kf3 Nd2?? 70.Kf2= Kh2 ½–½. Sundin,Thommy (1975) – Axelsson,Sven (1970), Sundsvall, 1989.

7.Be2= 0–0 8.0–0 Nbd7 9.a4 Ne4 10.d3 Nd6 11.Nc3 =.

7.Be2= 0–0 8.0–0 Nbd7 9.c4 dc4 10.Bc4 Nb6 11.Be2 Bd3 12.Ne5 Be2 13.Qe2 Nfd7 14.d4 Ne5 15.fe5 Qd5 16.Rc1 Rfc8 17.e4 Qd8 18.a4 a5 19.Nd2 c5 20.bc6 bc6 21.Nb3 Nd7 22.Rc3 Rab8 23.Qc2 Qb6 24.Rd3 Rd8 25.Kh1 c5 26.Qc3? c4 27.Qc4 Ne5 28.de5 Rd3 29.Qd3 Qb3 30.Qb3 Rb3 31.Bd4 Rd3 32.Bb6 Bb4 33.h3 Rd2 34.Rc1 Ra2–+ 35.Rc8 Kh7 36.Rc4 Ra4 37.Kh2 Ra2 38.Bc7 Bd2 39.Kg3 Be1 40.Kh2 Ra3 0–1. Grund,Karl – Fragiacomo, corr ICCF EU–H–291, 1969.

7.Be2= 0–0 8.0–0 Nbd7 9.Nd4 Bh7=.

7.Be2 Nbd7 8.0–0 0–0 (--> 7.Be2 0–0 8.0–0 Nbd7).

4.Bf6 ef6

5.a3 a5 6.b5 d4 (6...c5 7.Nf3=) 7.ed4 (7.Nf3 de3 8.fe3 Bd6=) 7...Qd4=+ 8.Nc3 Bc5 9.Qf3 Qe5 (< 9...Bc2 10.Rc1 Qe5 11.Nce2+=) 10.Kd1 0–0 (10...c6 11.Bc4=+) 11.Bc4 (11.Qb7 Bf2 12.Nf3+/–) 11...Rd8=+ 12.Nge2 c6 13.Ra2 (13.Re1 cb5 14.Qb7 Nd7= (14...bc4?! 15.Qa8 Qd6 16.Nb1 Bf2 17.Rf1=+)) 13...cb5 (13...Bg6 14.d3=+) 14.Qb7 bc4 (14...Ra7 15.Qb5 Rad7 16.d3 Bf2 17.Qe5 fe5 18.Rf1 Bd3 19.Bd3+–) 15.Qa8 Qd6 16.Qd5 (16.d4 Bd4 17.Nb5 Qb6 18.Nbd4 Qb1 19.Nc1 Rd4 20.Ke2 Qb6=) 16...Qd5–+ 17.Nd5 Rd5 18.Rb2 Nc6 19.Rb5 g5 20.Re1 Re5 21.a4 Nb4 (22.f4 Bc2 23.Kc1 Nd3 24.Kc2 Ne1 25.Kd1 Re2 26.Ke2 Nd3 27.fg5 fg5 28.Ra5 f5–+) 0–1. Andersson,Lars H – Gross,Wilhelm, corr SOK–93–95, 1994.

5.a3 c5 6.c3 Nc6 7.Nf3 Bd6 8.Nh4 Be6 9.Be2 0–0 10.Bg4 Bg4 11.Qg4 cb4 12.Nf5 g6 13.Nh6 Kg7 14.Nf5 Kh8 15.Nd6 Qd6 16.cb4 Rfe8 17.0–0 Qe5 18.Nc3 d4 19.Ne4 f5 20.Qg3 Qe4 21.f3 Qd3 22.e4 fe4 23.fe4 Qg3 24.hg3 Kg7 25.Rf4 Ne5 26.Raf1 Re7 27.R4f2 Nd3 28.Rf3 Nb2 29.d3 Na4 30.g4 Nc3 31.Kh1 a5 32.g5 ab4 33.ab4 Ra2 34.b5 Rb2 35.Rh3 Rb5 36.Rf4 Rg5 37.Rfh4 h5 38.Rf4 Ne2 39.Rff3 b5 40.Rf2 Ng3 41.Kh2 h4 42.Rb2 Rb7 43.Rh4 Nh5 44.Rh3 b4 45.Rf3 b3 46.Rff2 Rc5 47.g4 Nf6 48.g5 Nh5 49.Rg2 Rc3 50.e5 Nf4 51.Rgf2 Nd3 52.Rf3 Nb2 53.Rc3 dc3 54.Kg3 c2 55.e6 c1Q 56.Kg4 Black ran out of time 1–0. ronnieg (2555) – judicorum (2830), fics, 2001.

5.b5 Bd6 6.Nc3 =+.

5.b5 Nd7

6.d4 Bb4 7.c3 Bd6 8.Bd3 Bd3 9.Qd3 0–0 10.Nf3 a6 11.0–0 ab5 12.Qb5 Nb6 13.Nbd2 c6 14.Qd3 Qc7 15.Rfb1 Ra4 16.e4 Rfa8 17.Rb2 Ba3 18.Rb3 R8a6 19.Qc2 Bd6 20.Rbb1 c5 21.dc5 Bc5 22.ed5 Nd5 23.Ne4 Bf8 24.Rb2 f5 25.Ng3 Qc3 26.Nf5 Qc2 27.Rc2 b5 28.Kf1 b4 29.N5d4 Ra8 30.Nb3 g6 31.Nfd4 Nc3 32.Ke1 Ra2 33.Rca2 Ra2 34.Ra2 Na2 35.Kd2 Nc3 36.Kd3 f5 37.Nc6 Nd1 38.Ke2 Nf2?? 39.Kf2+/– Kf7 ½–½. Woschkat,Karl_Heinz – Hehemann,Achim, DESC, 1999.

6.Nf3 Bd6 7.Nd4 Bg6 (7...Be6 8.Be2=) 8.Be2 (8.Nc3 Nb6=) 8...0–0 9.0–0 Be5 10.f4 Bd6?? (10...Bd4 11.ed4 Re8+/–) 11.f5+– c5 (11...Qe7 12.fg6 fg6 13.Nc3+–) 12.Nb3 (12…Qb8 13.h3+–; better is 12.bc6 Bh2 13.Kh2 Qc7 14.Kg1 bc6 15.fg6 hg6 16.Nc3+–) 1–0. umji5 – LITTLEBUSTARD, Live Game Caissa's Web, 2004.

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    Available lines:
  • 1.b4 (4 players, 1 day/move)
  • 1.b4 (4 players, 10 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 (4 players, 3 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
  • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
  • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
  • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
  • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

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