2.e3 b6 3.c4 Bb7 4.Bb2 Nf6 5.Nf3 g6 6.Nc3 Bg7 7.d4 0-0 8.Be2 e6 9.0-0 d5 10.c5 bc5 11.bc5 Ba6 12.Ba6 Na6 13.Qa4 Nc7? (better 13...Nb8!?+=) 14.Qc6+- e5 (better 14...a6+-) 15.Ne5 Ne4 (15...Re8 16.Rab1+-) 16.Ne4 de4 17.Nd7 (17.Qe4!? Qd5 18.Qd5 Nd5+-) 17...Re8 18.Nf6?? (better 18.Qa4+-) 18...Bf6-+ 19.Qf6?? (better 19.Rab1-+) 19...Qf6 20.Rab1 (20.Rfd1 Rab8 21.Rd2 Nd5-+) 20…Qe6 (20...Qe6 21.Bc3 Rab8-+) 0-1. GM_HUSARZ (2020) - Rummstein (2020), Rated Bullet game, lichess.org, 2015.

2.e3 Qc7 3.Bb2 e5 4.Nf3 f6 (4...e4 5.Nd4+=) 5.a3 d5 6.c4 Be6 7.cd5 cd5 8.Nc3 a6 9.Rc1 Qd7 (9...Nc6 10.Be2+/-) 10.Na4 Qd8 11.Nc5 (11.Be2 Nc6+/-) 11...Bc8 (11...Bc5!? 12.bc5 Ne7+=) 12.Qa4 Nd7?? (12...Kf7 13.Be2 Bc5 14.Rc5+/-) 13.Bb5! Bc5 (13...ab5 14.Qa8 Pinning (14.Qa8 Deflection)) 14.Rc5 (better 14.bc5 Ne7 15.d4+/-) 14...ab5= 15.Qa8 Nc5 16.bc5 Ne7 17.0-0 (17.d4 e4 18.Nd2 0-0=) 17...0-0 18.Rc1?? (18.Qa7 Nc6 19.Qb6 Qb6 20.cb6 Na5=+) 18...Qc7 (better 18...Nc6 19.d4 e4-+) 19.c6? (19.Qa7 Bg4=+) 19...Nc6 (better 19...bc6 20.Bc3 Bg4-+) 20.a4?? (better 20.Qa7!-/+) 20...Bg4 21.Qf8 (21.Qa7 Qf7 22.Qc5 Bf3 23.gf3 ba4 24.Kf1-+) 21...Kf8 22.ab5 Bf3 (22...Qb6 23.Ba3 Ne7 24.Ne1-+) 23.gf3 (23.bc6 Be2 24.cb7 Qb7 25.Bc3-+) 23...Ke7 (better 23...Qb6 24.Ba3 Ne7-+) 24.Ba3 Kd7 25.bc6 bc6 26.Bc5 Qa5 27.d4 ed4 28.ed4 Ke6 29.Kf1 Kf5 30.Re1 Qb5 31.Kg2 Qd3 (31...g5 32.Bd6-+) 32.Re3? (32.Re7 Kg6 33.Rc7 Qd2 34.Rc6 Qf4-+) 32...Qd1 (32...Qd2 33.h3-+) 33.h3? (33.Re7-+) 33...g5 34.Re7 Kf4 (better 34...h5-+) 35.Bd6= Kf5 36.Bc5 h5 37.Rf7 g4 (37...Qb3!? 38.Ra7-+) 38.hg4 hg4 39.fg4 Qg4 40.Kf1 Ke6?? (better 40...Qg6 41.Re7 Kg4-+) 41.Re7= Kf5 42.Rf7 Kg6 43.Re7 (43.Rc7 Qe6-+) 43...Qh3 44.Kg1 Kf5 0-1. Butterbrot (2010) - Lekabel (1925), Rated Blitz game, lichess.org, 2015.

3.a3 Nc7 4.Bb2 Nh6 5.Nc3 f6 6.Nf3 Nf7 (6...d5 7.d4=) 7.h4 (7.Be2 e5+=) 7...e5 8.h5 (8.d4 d5=) 8...d5=+ 9.Nh4 Be7 10.Ne2 f5 (10...a5 11.ba5 Ra5 12.Ng3–/+) 11.Nf3=+ Bf6 12.h6 g5 13.d4 e4 14.Nd2 0-0 15.c4 Kh8 16.Nc3 Be6 17.Qh5 f4 18.Be2 Nd6 19.Bg4 Bf7 (19...fe3 20.fe3 Qd7 21.Be6 Qe6 22.cd5 cd5 23.Na4=+) 20.Qh3= Bg6 21.c5 Ndb5 22.Ne2 a5 23.ef4 gf4 (23...Na6 24.fg5 Bg5 25.f4 Bf4 26.Nf4 Rf4 27.ba5=+) 24.Nf4 (24.a4 Na7+=) 24...Bd4 25.Ng6 hg6 26.Bd4 Nd4 27.Qc3? (better 27.Rc1=+) 27...Qf6–+ 28.Kd1 Ncb5 29.Qe3 (29.Qb2 Qf2 30.Re1–+) 29…ab4 (29...ab4 30.Qh3 Qf2–+) 0–1. FeegLood (2645) – caching (2725), lichess.org, 2018.

3.a3 Nc7 4.c4 d5 5.Bb2 Bf5 6.Nf3 e6 7.Qb3 Bd6?? (better is 7...dc4 8.Bc4 b5=) 8.Bg7+– f6 (8...dc4 9.Bc4 b5 10.Be2+– (< 10.Bh8 bc4 11.Qc4 Ne7+–)) 9.Bh8 Kf7 (9...dc4 10.Bc4 Kf7 11.Nh4+–) 10.c5 Be7 11.Bd3 (11.Nd4 Nh6 12.Nf5 ef5+–) 11...Nh6 12.Bf5 Qh8 (12...ef5 13.0-0 Kg8+–) 1–0. Kreuzer,Uwe – Quotschalla, Landesliga Mannheim, 1988.

3.a3 Nc7 4.d4 g6 5.Nd2 Bg7 6.c4 d5 7.Ngf3 e6 8.Bb2 Ne7 9.Bd3 0-0 10.0-0 a5 11.e4 f5 12.ef5 ef5 13.Re1 Kh8 14.Ne5 Ng8 15.Ndf3 Nf6 16.ba5 Ra5 17.Bc1 dc4 18.Bc4 Ncd5 19.Bg5 Qc7 20.Qb3 Ne4 21.Bh4 Be6 22.Ng5 Ng5 23.Bg5 Bg8 24.Rab1 b5 25.Bf1 Nf6 26.Qb4 Ra4 27.Qc3 Ne4 28.Re4 fe4 29.Qc6 Be5 30.Qb5 Ra5 31.Qe2 Bh2 32.Kh1 Rg5 33.Qe4 Rh5 34.Be2 Bg1 35.Kg1 Qh2 Time forfeit 0-1. cipiripi (2195) - killermove (2190), Rated Blitz game, lichess.org, 2015.

3.Bb2 d6?? 4.Bh8+– Bh6 (4...e5 5.Be2+–) 5.Bd4 (5.Nf3 Qb6+–) 5...Na6 (5...e5 6.Bb2+–) 6.Nc3 (better is 6.Ba6!? ba6 7.Qf3 Bd7+–) 6...Nb4 (6...e5 7.Be5! de5 8.Ba6 ba6 9.Nf3+–) 7.a3 Qa5 (7...e5 8.ab4 ed4 9.ed4 Qb6+–) 8.ab4 Qb4 (8...Qc7 9.Ba7 b5 10.Bd4 Ra1 11.Qa1+–) 9.Ra4 Qb2 10.Ne4 Bg4 11.f3 Qb6 12.Bb6 Bf5 13.Ba7 (13.Qa1 a6 14.Qh8 Kf8 15.Qh7 Bg7+–) 13...d5 14.Nc5 Bg5 15.Nb7 d4 16.Ne2 (16.Ra5 Bh4 17.g3 Bf6+–) 16...Bh4 17.g3 Ra7 18.Ra7 Bg5 19.Nc5 Nf6 20.Nd4 Bc8 21.Nc6 Kf8 22.c3 Nd5 23.Qb3 Nf4 24.ef4 e5 25.Qf7 1–0. aconroy – markcav, net–chess.com, 2002.

3.Bb2 Nf6 4.d4 Qb6 5.Nf3 Bg7 6.a3 0-0 7.Bd3 d5 8.c4 dc4 9.Bc4 a5 10.Nbd2 ab4 11.0-0 (11.Qb3 Nbd7=) 11...ba3 10 12.Ba3 Re8 (better 12...Qc7=) 13.Ng5+– Nd5 (13...e6 14.Qf3 Qd8 15.Be7 Qe7 16.Ra8+–) 14.Qf3 f6? (better 14...Bf6 15.Bc5 Ra1 16.Bb6 Rf1 17.Kf1 Bg5 18.Bd5 cd5 19.Qd5 Bh6+–) 15.Bc5 Qc7 (15...Ra1 16.Bb6 (16.Ra1?! Qd8 17.e4 fg5 18.ed5 cd5 19.Qd5 Qd5 20.Bd5 e6=) 16...Rf1 17.Kf1 fg5 18.Bd5 cd5 19.Qd5 Kh8 20.Qf7+–) 16.Ra8 fg5 35 17.Bd5 cd5 18.Qd5 Kh8 (18...e6 19.Qg5 b6 20.Bb6 Qb6 21.Rb1+–) 19.Qf7 Rf8 (19...Rg8 20.Qe7 Qe7 21.Be7 Nd7+–) 20.Qe7 Qe7 (20...Bd7 21.Bd6 Qd8 22.Qd8 Rd8 23.Rb8 Rb8 24.Bb8+–) 21.Be7 Re8 (21...Rg8 22.Rb8 Bd7 23.Rb7+–) 22.Rb8 Re7 (22...Bd7 23.Re8 Be8+–) 23.Rc8 (23.Rc8 Bf8 24.Rf8 Kg7 25.Rb8+–) 1–0. Janek – Tyzkus, internet, 2017.

3.Bb2 Nf6 4.Nf3 Bg7 5.c4 0-0 6.d4 a5 7.b5 d5 8.Nbd2 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 a5 8.b5).

3.ba5 Ra5 4.a4 d5 5.Bb2 Nf6 6.Nf3 g6 7.c4 Bg7 8.cd5 Qd5 9.Nc3 Qd8 10.Be2 Na6 11.Na2 0-0 12.Bc3 Rd5 13.Bc4 Rd7 14.0-0 e6 15.Ne5 Re7? (better is 15...Rd6!? 16.d4 c5=) 16.Ba6+– ba6?? (16...Nd5 17.Nc6! bc6 18.Bg7 Kg7 19.Bc8 Qc8 20.e4+–) 17.Bb4 (better is 17.Nc6 Qd6 18.Ne7 Qe7 19.Bb4+–) 17...Nd5 (17...Rc7!?+–) 18.Nc6 (18.Be7?! Ne7 19.f4 f6+–) 18...Qd7 19.Ne7 Ne7 20.Rc1 Re8 21.Ba5?? (21.Bc3 f6+–) 21...Be5?? (21...Qd5 22.Bb4 Qd7+–) 22.f4 Bb8 23.Qb3 Bb7 24.Rb1 Bd5 25.Qb2 Qa4 26.Bc3 Qa2 (better is 26...Bd6!? 27.Bh8 Nf5+–) 27.Qb7?? (better is 27.Qb8 Rf8 28.Qc7+–) 27...Bb7–+ (27...Bb7 28.Rb7 Nd5–+) 0–1. chybol3 – ewcialinka89, kurnik, 2012.

3.c3 ab4+= 4.cb4 e5 5.a3 Bb4 6.Bb2 Bd6 7.Nf3 f6 8.Be2 (8.Nc3+=) 8...h5 (better is 8...Bc7!?–/+) 9.0-0 (9.d4 e4 10.Nfd2 Qe7+=) 9...g6 (better is 9...Be7!?=) 10.Qc2+= Kf7 11.Nh4 (11.d4 ed4 12.Bd4 Kg7+/–) 11...Ne7+= 12.Bc4 Kg7 13.Bd3 f5 (better is 13...Rh6+=) 14.f4+/– Nd5 15.fe5 Qh4? (better is 15...Be7 16.Nf3 b6+/–) 16.ed6+– Nf6 17.Nc3 (better is 17.Bf5 Rf8 18.Bg6+–) 17...b6?? (17...Rf8 18.Rf4 Qg5 19.Raf1+–) 18.Ne2 (18.Rf4 Qg5 19.Ne4 fe4 20.Bf6 Qf6 21.Rf6 Kf6+–) 18...c5?? (better is 18...Ba6+/–) 19.Rf4 Qg5 Black plans h4 20.g3 (20.Bf5 Bb7 21.Be4 Be4 22.Qe4 Nc6+–) 20...h4?? (better is 20...Rf8+–) 21.Bc4 (21.Bf5 gf5 22.Rf5+–) 21...Bb7 (21...Ba6+=) 22.Kf2 (better is 22.Qb3!? Ba6 23.Qb6 Bc4 24.Rc4 hg3 25.Ng3+–) 22...hg3= 23.hg3 Rh2 24.Ke1 Rh1 25.Kf2 Kf8 (25...Ra1!? 26.Ba1 Ra3+=) 26.Rh1+/– Bh1 27.Bf6 (better is 27.Ke1 Bg2 28.Qc3+–) 27...Qf6= 28.Qc3 Qc3 29.Nc3 (worse is 29.dc3 Be4+= (29...Ra3? 30.Rh4+–)) 29...Ra3?? (better is 29...Bc6+=) 30.Nd5?? (better is 30.Rh4 Nc6 31.Rh1+–) 30...Ra4?? (30...Bd5 31.Bd5 Rd3 32.e4–+) 31.Bf1? (31.Nb6 Rb4 32.Rh4 Rb6 33.Rh1+=) 31...Bd5?? (better is 31...Ra2 32.Nb6 Rd2 33.Kg1 Be4–/+) 32.Ra4+= Nc6 33.Ra8 Kf7 34.Rh8 (34.Ra6!?+=) 34...Ke6 0–1. surmavlod – framar1956, kurnik, 2013.

3.c3 Nf6 4.Bb2 e6 5.Nf3 Be7 (5...ab4 6.a3 bc3 7.Nc3-/+) 6.b5= cb5 (6...0-0 7.c4=) 7.Be2 (7.Bb5 0-0=) 7...0-0 8.0-0 Qb6 (8...d5 9.Bb5 Bd7 10.c4=+) 9.d4 (better 9.Na3!?=) 9...Nc6 10.Nbd2 d5 11.a3 Bd7 12.Rb1 (12.Qb3 Ra6-/+) 12...Na7 (12...Rfc8 13.Ne5-/+) 13.a4 ba4 14.Ba3 Qd8 15.Be7 Qe7 16.Rb7 Qd6 (16...Rfb8 17.Rb8 Rb8 18.c4-/+) 17.Ne5 (17.c4 Rfb8 18.c5 Qe7=) 17...Bc6 (17...Rfb8 18.Rb8 Rb8 19.Qa1=+) 18.Rb6 (18.Rb1 Nd7 19.Nc6 Qc6+=) 18...Rfc8 (18...Nd7!? 19.Nd7 Qd7=+) 19.c4= Rab8 20.c5 Qe7? (20...Qc7 21.Nc6 Nc6 22.Rb8 Rb8 23.Qa4=) 21.Qb1 (better 21.Ba6 Rb6 22.cb6+-) 21...Rb6? (better 21...Qc7+=) 22.cb6+- (22.cb6 Be8 23.ba7 Qa7 24.h3+-; 22.Qb6?! Be8+=) 1-0. Bushwacker (1905) - Mely (1960), ChessWorld.net, 2019.

4.Nc3 d5 A) 5.f4 A1) 5...Nf6 6.Bb2 (6.Nf3 Bg4 7.Bb2 e6 8.Be2 Bd6 9.Nd4; 6.Be2 b5 7.Bb2 Qb4 8.a3 Qb2 9.Ra2; 6.Nge2 Nbd7 7.Bb2 e5 8.a4 Be7 9.Rb1) 6...b5 7.Nf3 Bg4 8.a4 b4 9.Nb5; A2) 5...Nd7 6.Nf3 Ngf6 7.Be2 b5 8.Bb2 e6 9.a4; A3) 5...e6 6.Bb2 (6.Nf3 Nf6 7.Bb2 Be7 8.Nd4 0-0 9.Qf3; 6.Bd3 b5 7.Bb2 Nd7 8.Nf3 Ngf6 9.0-0; 6.Be2 Bd6 7.Bb2 Nf6 8.Nf3 0-0 9.Nd4; 6.Nge2 b5 7.Bb2 Ba3 8.Na4 Bb2 9.Nb2) 6...Nf6 7.Bd3 Bd6 8.Nf3 0-0 9.0-0; A4) 5...b5 6.Bb2 (6.a4 b4 7.Nce2 c5 8.Nf3 Bd7 9.Bb2; 6.Nf3 g6 7.Bb2 Bg7 8.Nd4 Bd4 9.ed4; 6.a3 Ra7 7.Bb2 Nf6 8.Be2 e6 9.Nf3) 6...Nf6 7.Nf3 Bg4 8.a4 b4 9.Nb5; B) 5.Nf3 B1) 5...Bg4 6.Bb2 (6.Be2 Nf6 7.Bb2 Bf3 8.Bf3 e5 9.0-0; 6.h3 Bf3 7.Qf3 e5 8.Rb1 b5 9.Nb5; 6.Rb1 b5 7.h3 Bf3 8.Qf3 Nf6 9.Bb2 ; 6.a3 e5 7.h3 Bf3 8.Qf3 Nf6 9.Bb2) 6...e5 7.Be2 Bf3 8.Bf3 Nf6 9.0-0; B2) 5...Nd7 6.e4 de4 7.Ne4 e5 8.Qe2 Be7 9.Bb2; B3) 5...Nf6 6.Bb2 (6.Nb1 Nbd7 7.Bb2 Qb6 8.Qc1 e6 9.Be2; 6.Ne2 Nbd7 7.Bb2 Qb6 8.Qc1 Qc7 9.Ng3; 6.Be2 Nbd7 7.Nd4 e5 8.Nb3 Qc7 9.0-0; 6.Qe2 b5 7.Bb2 Qb4 8.Rb1 Qg4 9.Ra1) 6...Nbd7 7.Nb1 e6 8.Be2 Bd6 9.Nc3.

4.Nc3 e5 A) 5.e4 A1) 5...b5 6.Nf3 (6.Bb2 Nf6 7.Qf3 Bc5 8.a4 d6 9.Qg3; 6.a4 Nf6 7.Qf3 Bc5 8.Bb2 d6 9.Qg3; 6.Qf3 Nf6 7.Bb2 Bc5 8.a4 d6 9.Qg3) 6...d6 7.Qe2 Nf6 8.a4 Be7 9.Bb2; A2) 5...Bb4 6.Bb2 (6.Nge2 Nf6 7.Bb2 0-0 8.Nc1 d6 9.Nb3) 6...Nf6 7.Nge2 Bc5 8.Nc1 Bf2 9.Kf2; A3) 5...d6 6.Nf3 (6.a4 b5 7.Bb2 b4 8.Nce2 Nf6 9.Ng3; 6.Rb1 b5 7.a3 Nf6 8.Nf3 Be7 9.Be2; 6.Be2 Nf6 7.a3 Nbd7 8.Bf3 Be7 9.Nge2 ; 6.Bb2 Nf6 7.Qe2 Be7 8.Nf3 0-0 9.Qe3) 6...b5 7.a4 Nf6 8.Qe2 Be7 9.Bb2; B) 5.f4 B1) 5...b5 6.a4 (6.fe5 b4 7.Nce2 Qe5 8.Nd4 Qd5 9.Qf3; 6.Nf3 b4 7.Nb1 e4 8.Nd4 Nf6 9.a3) 6...b4 7.Nce2 ef4 8.Nf4 d5 9.Bb2; B2) 5...d6 6.Nf3 (6.Nge2 b5 7.Bb2 Nf6 8.Nc1 ef4 9.ef4; 6.Nce2 Nf6 7.Bb2 Be6 8.Nf3 Nbd7 9.Ng5) 6...b5 7.a4 b4 8.Ne4 d5 9.Nf2; B3) 5...Ne7 6.fe5 Qe5 7.Nf3 Qa5 8.Bb2 d5 9.Be2; B4) 5...ef4 6.ef4 d5 7.Nge2 Nf6 8.Bb2 Bd6 9.a4; C) 5.Nf3 C1) 5...d6 6.Be2 Nf6 7.0-0 b5 8.a4 b4 9.Na2; C2) 5...Be7 6.Bb2 (6.Be2 Nf6 7.Bb2 d6 8.0-0 0-0 9.e4) 6...d6 7.Be2 Nf6 8.0-0 b5 9.a3; C3) 5...Bb4 6.Bb2 Nf6 7.Be2 0-0 8.a3 Be7 9.e4; C4) 5...Nf6 6.Be2 d6 7.Bb2 Be7 8.a3 0-0 9.0-0.

4.Nc3 Nf6 A) 5.Nf3 A1) 5...d6 6.Be2 b5 7.Bb2 e5 8.a3 Be7 9.0-0; A2) 5...e5 6.Be2 (6.Bd3 d6 7.0-0 b5 8.Be2 Be7 9.Bb2; 6.Bb2 d6 7.a4 Be7 8.Be2 0-0 9.0-0) 6...e4 7.Nd4 b5 8.a4 b4 9.Nb1; A3) 5...b5 6.Bb2 d6 7.a4 b4 8.Ne2 e5 9.Nc1; A4) 5...d5 6.Bb2 (6.Be2 Nbd7 7.Nd4 e5 8.Nb3 Qc7 9.0-0; 6.Nb1 Nbd7 7.Bb2 e6 8.Nc3 Bd6 9.Nd4; 6.Ne2 Nbd7 7.Bb2 Qc7 8.d4 e6 9.Ng3; 6.Bd3 Nbd7 7.0-0 e5 8.Bf5 Bd6 9.Bb2) 6...Nbd7 7.Nb1 e6 8.Bc3 Qc7 9.d4; B) 5.Be2 B1) 5...e5 6.Nf3 d6 7.Bb2 b5 8.a4 b4 9.Na2; B2) 5...d6 6.Nf3 b5 7.Bb2 e5 8.a4 b4 9.Na2; B3) 5...d5 6.Nf3 (6.f4 b5 7.Bb2 g6 8.a4 b4 9.Nb5; 6.a4 e5 7.Nf3 Bb4 8.Bb2 Nbd7 9.Rb1) 6...Nbd7 7.Bb2 e5 8.0-0 Bd6 9.Nh4; B4) 5...b5 6.Nf3 (6.a4 b4 7.Na2 e5 8.Bb2 Be7 9.Nc1; 6.Bb2 e5 7.a4 b4 8.Na2 d6 9.Nf3; 6.f4 e6 7.a4 b4 8.Nb1 Be7 9.Bb2) 6...b4 7.Nb1 e5 8.a3 e4 9.Nd4; C) 5.Bb2 C1) 5...d6 6.f4 (6.Nf3 e5 7.Be2 b5 8.a3 Bf5 9.0-0; 6.Be2 e5 7.Nf3 b5 8.a4 b4 9.Na2; 6.Nce2 e5 7.Nf3 b5 8.Nc1 Qa4 9.Be2; 6.a4 e5 7.Nf3 Be7 8.Rb1 0-0 9.Be2) 6...e5 7.fe5 de5 8.Nf3 e4 9.Nd4; C2) 5...e5 6.Nf3 (6.Nce2 d6 7.Bc3 Qc7 8.f4 Be6 9.Nf3; 6.Nb1 d6 7.Nf3 Be7 8.Be2 0-0 9.0-0) 6...d6 7.Be2 b5 8.a3 Bf5 9.0-0.

4.Nc3 g6 5.Rb1!?= A) 5...Bg7 6.Rb3 (6.Bb2 d5 7.Nf3 Nf6 8.Ne5 0-0 9.a4) 6...Na6 7.Bb2 b5 8.Nf3 d5 9.Ne2; B) 5...d5 6.Nf3 (6.Rb3 e5 7.f4 f6 8.fe5 fe5 9.Nf3; 6.Bb2 Bg7 7.Nf3 Nf6 8.Nd4 0-0 9.Nb3; 6.a4 e5 7.Nf3 Bb4 8.Bb2 f6 9.Be2) 6...b5 7.a4 b4 8.Na2 c5 9.c3; C) 5...b5 6.Bb2 (6.a4 b4 7.Bb2 f6 8.Nce2 e5 9.Nc1) 6...f6 7.Ra1 e5 8.e4 Bc5 9.a4.

4.Nc3 g6 5.Bb2 A) 5...d6 6.Nf3 (6.Rb1 Bg7 7.Nge2 Nf6 8.a4 0-0 9.Nd4; 6.Be2 Bg7 7.Nf3 Nf6 8.Ne4 Nbd7 9.Nf6; 6.Nce2 Nf6 7.Bf6 ef6 8.Nd4 Bg7 9.Ngf3 ; 6.a3 Bg7 7.Nf3 Nf6 8.Be2 0-0 9.Nd4) 6...e5 7.Be2 Nf6 8.0-0 Bg7 9.d4; B) 5...Bg7 6.Qc1 (6.Nf3 b5 7.Nd4 b4 8.Ne4 Qb6 9.c4; 6.Nge2 d5 7.Nd4 Nf6 8.Be2 b5 9.a4; 6.Rb1 d5 7.Nf3 Nf6 8.Nd4 0-0 9.Nb3) 6...e5 7.f4 d6 8.Nf3 f5 9.Be2.

4.Nc3 g6 5.Bc4 Bg7+= (5...b5 6.Bb3 Bg7 7.Bb2 d5 8.d4 Nf6 9.a4; 5...d5 6.Bb3 (6.Be2 b5 7.Bb2 Bg7 8.a3 Nf6 9.Nf3; 6.Bd3 Bg7 7.Bb2 b5 8.a3 Nf6 9.Nf3) 6...Nf6 7.Bb2 Bg7 8.Nf3 b5 9.0-0) 6.Bb2 (6.Bb3 d5 7.Bb2 Nf6 8.Nf3 0-0 9.Rb1) 6...d5 (6...b5 7.Bb3 d5 8.Nf3 Bg4 9.h3) 7.Bb3 e5 (7...Nf6 8.Nf3–/+ (8.Nce2 0-0 9.c4) 8...0-0 9.Rb1) 8.Nge2 (8.Nf3 Ne7+= (8...e4 9.Nd4) 9.e4) 8...Nf6 9.0-0 Nbd7 10.d4 e4 (10...0-0 11.a4–/+) 11.Na4 (11.a4 0-0+=) 11...b5 12.Bc3 Qc7 13.Nb2 Nb6 (13...Bf8 14.a3–/+) 14.g3 (14.a4!?+=) 14...Bh3 15.Re1 0-0 (15...Na4 16.Ba4 ba4 17.a3–/+) 16.Bb4 (16.a4 Bg4–/+) 16...Rfe8 (16...Rfb8 17.c3–/+) 17.a4–/+ ba4 (17...Nc4 18.Qc1–/+) 18.Na4 Na4 19.Ba4 (19.Ra4 Ra4 20.Ba4 Ra8–/+) 19...Reb8 (19...g5 20.c4–/+) 20.Qd2 Qc8 (20...Bg4–/+) 21.Nf4 (21.Bd6 Rb6 22.Bb3 Bg4+=) 21...Bg4 (better is 21...g5!? 22.Ng2 Ng4–/+) 22.Bd6+= Rb2 (22...Rb6 23.Bb3+=) 23.Qc3 (better is 23.Bb3+/–) 23...Rb6+= 24.Bb3 Rba6 25.Ra6 Ra6 26.Ra1 Qa8 27.Ra6 Qa6 28.Bc5 (28.Be7 g5 29.Ng2 h6+=) 28...Nd7 29.Bb4 (29.Be7 Bf6 30.Bf6 Nf6+=) 29...Qb5 (29...g5 30.h3 Bf3 31.Ng2–/+) 30.Qe1 (30.Bd6 Nb6+=) 30...Nb6 (30...g5 31.Ng2–/+) 31.Bc5 Nc4 (better is 31...g5 32.h3 Bf3+=) 32.Qa1? (32.h3 Bf3=) 32...Qa5?? (better is 32...Qc5! 33.Qa8 Qf8 34.Qc6 Qa3 35.Bc4 dc4 36.Qe4 Bf5 37.Qe8 Bf8–+) 33.Qa5= Na5 34.Ba4 Bd7?? (34...g5 35.h3 gf4 36.hg4 fe3 37.fe3=) 35.Bb6?? (better is 35.Nd5 cd5 36.Bd7+–) 35...Nc4= 36.Bc5 Bf8?? (better is 36...Nb2!? 37.Bb3 Bf8+=) 37.Bf8 (better is 37.Nd5 cd5 38.Bd7+–) 37...Kf8 38.Kf1 (better is 38.Nd5 cd5 39.Bd7+/–) 38...Ke7 39.Ke2 (39.Ke1 Kd6+=) 39...Bg4 (39...g5!? 40.Ng2 Bg4 41.Kf1 Nd2 42.Kg1 Nf3 43.Kh1 Kd6–/+) 40.Ke1+= Kd6 41.h3 Bf3 42.Ne2 Be2 (42...Na5 43.Kd2+=) 43.Ke2= f6 44.c3 h6 45.Kd1?? (better is 45.g4=) 45...Nb2–+ 46.Kc2 Na4 47.Kb3 Nb6 48.Kb4 (48.Kc2 h5–+) 48...Nc4 49.Kb3 c5 (49...Nd2 50.Kc2 Nf3 51.h4–+) 50.Kc2 cd4 51.cd4 Kc6 52.Kc3 (52.g4 Kb5–+) 52...Kb5 53.Kb3 (53.Kc2 Kb4 54.Kd1 Ne3 55.Ke2 Nf5–+) 53...Nd2 54.Kc2 Nf3 55.Kc3 Ka4 56.Kb2 (56.h4 Kb5–+) 56...Kb4 57.Kc2 Kc4 0–1. leighcastle – kehrsam, ChessWorld.net, 2009.

4.Nc3 g6 5.Nf3 A) 5...d5 6.Bb2 (6.Be2 Bg7 7.Bb2 b5 8.Nd4 Nf6 9.a4; 6.Rb1 b5 7.a4 b4 8.Na2 c5 9.c3; 6.e4 de4 7.Ne4 Bg7 8.c3 f5 9.Ng3; 6.a3 Bg7 7.Bb2 Nf6 8.Nd4 e5 9.Nb3) 6...Bg7 7.Be2 b5 8.Nd4 Nf6 9.a4; B) 5...Nf6 6.Bb2 (6.Be2 Bg7 7.Bb2 0-0 8.0-0 d5 9.Nd4; 6.Nd4 d5 7.Bb2 Bg7 8.Be2 b5 9.a4; 6.Qe2 Bg7 7.Bb2 d5 8.Nd4 0-0 9.Nb3; 6.Rb1 d5 7.Rb3 Na6 8.Be2 Bg7 9.Bb2) 6...d5 7.Be2 Bg7 8.0-0 0-0 9.a4; C) 5...Bg7 6.Bb2 (6.Nd4 d5 7.Nb3 Qc7 8.Bb2 Nf6 9.Be2) 6...d5 7.Be2 b5 8.Nd4 Nf6 9.a4.

4.c4 Nf6 5.Nc3 Na6 6.Nf3 g6 7.Be2 Bg7 8.0-0 0-0 9.a3 Ne4 10.Ne4 Ba1 11.d4 c5?? (11...d5!? 12.Ned2 Bc3–/+) 12.Qb3?? (better is 12.Bd2!? Qa3 13.Qa1 Qa1 14.Ra1+/–) 12...f5 (12...cd4 13.ed4 Nc7=) 13.Ng3?? (13.Bd2 Qd8 14.Ng3 f4+/–) 13...Qc3?? (13...Nc7 14.Bd3 d6 15.Qb1+=) 14.Qb5?? (better is 14.Qb1!? cd4 15.ed4+–) 14...cd4 15.ed4 Nc7 Attacking the isolated pawn on a3 16.Qe5 (better is 16.Qc5 Qa5 17.Qe7=) 16...Ne6–+ 17.Qd5 Kg7 18.h4? (better is 18.Qe5 Rf6 19.Bg5 Qa3 20.c5+=) 18...Nd4 19.h5 Ne2 20.Ne2 Qa5 21.h6 Kh8 22.c5 e6 23.Qd6 Kg8 24.Ned4 Bd4?? (24...Qa4 25.Be3 f4=) 25.Qd4+– Rf7 26.Bb2 Kf8 27.Ng5 d6 (27...Ke8+–) 28.Nf7 (better is 28.Qh8!? Ke7 29.cd6 Kd6 30.Nf7 Kc6 31.Rc1 Kb5 32.Nd6 Ka6+–) 28...e5 29.Ne5! de5 30.Qe5 (30.Qe5 Qd2 31.Qh8 Ke7 32.Qh7 Ke6 33.Qg6 Ke7 34.Qf6 Kd7 35.h7+–) 1–0. combijack (1780) – chesssebas (1695), gameknot.com, 2011.

4.Nf3 d5 5.c4 Bg4 6.cd5 Qd5 7.Be2 Nf6 8.0-0 g6 9.Nc3 Qa5 10.h3 Bc8 11.Qb3 Bg7 12.d4 0-0 13.Bd2 Qa3 14.Rfb1 Qb3 15.Rb3 Nbd7 16.e4 e6 17.Bf4 Re8 18.Rc1 Nh5 19.Be3 e5 20.d5 cd5 21.Nd5 Ndf6 22.Nc7 Be6 23.Ne8 Ne8 24.Rb7 Ra2 25.Bc4 Bc4 26.Rc4 Ra8 27.Ng5 Nd6 28.Rcc7 Nb7 29.Rb7 f6 30.Ne6 Re8 31.Rb6 Nf4 32.Bf4 ef4 33.f3 g5 34.h4 Bf8 35.Kh2 h6 36.Kh3 Kf7 37.Nd4 Kg6 38.Nf5 Ra8 39.Rb7 Ra1 40.Kh2 Ra8 41.Rc7 Rb8 42.Rd7 Ra8 43.Rb7 Rb8 44.Kh3 Rb7 45.h5 Kh5 46.Nd4 Kg6 47.Ne6 Bd6 48.Nd4 Rb4 49.Nf5 Bf8 50.Kh2 h5 51.Kh3 Rb5 52.Nd4 Rb4 53.Ne6 Time forfeit 1-0. cipiripi (2220) - kekss5 (2145), Rated Blitz game, lichess.org, 2015.

4.Nf3 e5 5.Be2 d6 6.0-0 g6 (6...Nf6 7.d3=) 7.Bb2 Bg7 8.Ba3 (8.c4 Nf6=) 8...e4= 9.Nd4 Qd8 (9...c5 10.Nb3 Qa4 11.c3=) 10.Bb2 Nf6 11.Nc3 0-0 12.f3 d5 13.fe4 de4 14.Rb1 (14.d3 Re8=) 14...Qe7 15.a4 Nd5 (15...Rd8 16.Qe1=) 16.Nd5+= cd5 17.Bb5 Qg5 18.Qe1 (18.Qe2 Bg4 19.Qf2 f6+=) 18...Bh3 (18...Bd7 19.Bc3=) 19.Qf2+= f6 20.Ba3 Rc8 21.Bd6 Bg4 (21...Nc6 22.Bf4 Qg2 23.Qg2 Bg2 24.Kg2 Nd4 25.ed4 Rc2+–) 22.Bf4+– Qh5 23.h3 Bh3 24.gh3 Qh3 25.Qg3 (25.d3 Qg4 26.Kh2 Qh5 27.Kg3 f5+–) 25...Qg3+/– 26.Bg3 f5 27.Rfc1 (27.c3 Nc6+/–) 27...Kf7 (27...Bd4 28.ed4 Nc6 29.Bf2+/–) 28.Be2+– Bd4 29.Rb7 Ke6 30.ed4 Nd7 (better is 30...Nc6 31.Rb6 Kf7+–) 31.Bb5 Nf8 32.Be5 Rd8 (32...g5 33.Rb6 Ke7 34.c4+–) 33.c4 Rdc8 (33...f4 34.cd5 Rd5+–) 34.cd5 Kd5 35.Rbc7 (35...Rc7 36.Rc7 e3 37.d3 Ra4 38.Ba4 f4 39.Bb3#) 1–0. Peter,Josef – Pommerel,Wim, CiF, 1989.

4.Nf3 e5 5.Be2 e4 6.Nd4 Qg5 7.0-0 d5 8.f4 Qg6 9.c4 dc4 10.Qc2 Nf6 11.f5 Qh6 12.Nc3 Bd6 13.g3 Be5 14.Ne4 0-0 15.Bb2 b5 16.a4 Re8 17.Nf2 Bd7 18.Bf3 Ra6 19.Rfb1 Rb6 20.Bc3 Ra6 21.Bb2 Rb6 22.Bc3 Ra6 23.Bb2 ½–½. pierre – smurilo, ChessHere.com, 2006.

4.Nf3 Nf6 5.Be2 d5 6.0-0 Bg4 7.Bb2 Nbd7 8.d3 e6 9.Nbd2 Bd6 10.c4 0-0 11.h3 Bh5 12.Qb3 Rfb8 13.Bc3 Qa4 14.d4 Ne4 15.Nb1 (15.Rfb1 Bg6 16.Qa4 Ra4 17.Ne4 Be4-/+ (worse 17...de4 18.Nh4+=)) 15...Qb3-/+ 16.ab3 Nc3 (16...Ra1!? 17.Ba1 Ra8-/+) 17.Nc3= h6 18.c5 Bc7 19.Bd3 (19.Rfc1 Ba5=) 19...f5 (19...Bf3 20.gf3 e5 21.b4=+) 20.b4 Be8 (20...g6 21.Nh2=) 21.Rfb1 b5 22.g4 g6 23.gf5 gf5 24.Kf1 Bh5 25.Nh4 Bd8 26.Ng2 Kf7 27.Nf4 Bf3 28.Be2 Be2 29.Ke2 Nf6 30.f3 Nh7 (30...Bc7 31.Nd3=) 31.e4+= Bg5 32.Nh5 (32.Nd3 Bf6 33.e5 Bh4+=) 32...Kg6= 33.Ng3 f4 34.Nf1 (34.Nh1 de4 35.Ne4 Nf6=) 34...Kf7 (34...Bf6 35.e5 Bh4 36.Nd2=+) 35.Nh2+= h5 36.ed5 (better 36.Rh1!?=) 36...ed5-/+ 37.Kd3 Nf8 (37...Bh4 38.Ra5-/+) 38.Re1 Bf6 39.Ra8? (better 39.Ne2 Ne6 40.Reb1-/+) 39...Ra8-+ 40.Nf1 (40.Re2 Ne6-+) 40...Ne6 41.Nd2 (41.Re6 Ke6 42.Nd2 Re8-+) 41...Nd4 (41...Bd4?! 42.Re6 Bc3 43.Rc6 Bb4 44.Nb1-+) 42.Rg1 Ne6 (42...Ra3 43.Rf1-+) 43.Nb3 (43.Rb1 Ng5-+) 43...Ra3 44.Kc2 Nd4 45.Nd4 Bd4 46.Re1 (46.Nb5 cb5 47.Rg5-+) 46...Rc3 47.Kd2 Rf3 48.Rb1 Rh3 49.Ke2 (49.Rf1 Kg6-+) 49...Be3 50.Kf1 (50.Rf1 Ke6 51.Rb1 Ke5-+) 50...Kf6 (50...f3 51.Rd1 Rh1) 51.Kg2 Ke5 (51...Rg3 52.Kh1 Kg5 53.Kh2 Kg4 54.Rg1 Bg1 55.Kh1 Bd4 56.Kh2 f3 57.Kh1 Rh3) 52.Kh3 Ke4 53.Kh4 Bd2 54.Rf1 (54.Kh5 f3 55.Kg4-+) 54...Bb4 55.Kh5 Bc5 56.Kg6 (56.Rc1 f3 57.Rc5 f2-+) 56...Be3 57.Kf6 c5 58.Ke6 d4 59.Kd6 d3 60.Kc6 d2 61.Kb5 Kd3 62.Rd1 Ke2 63.Ra1 d1Q 64.Ra2 Ke1 65.Kc6 Qe2! 66.Re2 (66.Re2 Ke2 67.Kb5 f3 68.Ka4 f2 69.Kb5 f1Q 70.Kc6 Qf6 71.Kc7 Qe6 72.Kb7 Qd7 73.Kb6 c4 74.Ka5 Qb7 75.Ka4 Bd2 76.Ka3 Qb3). cipiripi (2355) - Pikozrout (2235), Rated Blitz game, lichess.org, 2015.

4.Nf3 Nf6 5.Be2 d6 6.0-0 g6 (6...e5 7.d3=) 7.d4 Bg7 8.Nbd2 0-0 9.c4 Bg4 10.Nb3 Qc7 11.Qc2 Nbd7 12.h3 Bf5 13.Bd3 Bd3 14.Qd3 e5 15.de5 de5 16.Qc2 (16.e4 b6=) 16...Rfd8 (16...e4 17.Nfd4=+) 17.Bb2 b6 18.Rfd1 Ne8 19.Ng5 h6 20.Ne4 f5 21.Ng3 Nef6 22.c5 b5 23.Rd6 (23.e4 f4 24.Ne2 Bf8=+) 23...Bf8 24.Rd2 (24.Be5 Bd6 25.Bd6 Qb7=) 24...Nd5 25.a3 N7f6 (25...e4 26.Rad1=+) 26.Rad1 (26.e4 fe4 27.Ne4 Kg7=) 26...e4 (26...Ra4!?=+) 27.Nd4 Qe7?? (better 27...Rdc8 28.Ne6 Qf7 29.Nf8 Rf8=) 28.Nc6+- Qc5 29.Qc5 Bc5 30.Nd8 Ba3 31.Ba3 (31.Rd5?! Nd5 32.Ba3 Rd8+-) 31...Ra3 32.Rd5 Nd5 33.Rd5 b4 34.Rb5 b3 35.Nc6 Kf7 36.Nd4 Ra1 37.Kh2 Ra2 (37...Rb1 38.Rb3 Rb3 39.Nb3+-) 38.Rb3 Rf2 39.Rb7 (39.Nde2 Kf6+-) 39...Kf6 40.Rb6 Kg5 (40...Kf7+-) 41.h4! Kh4 (41...Kh4 42.Rg6 Mate attack) 42.Rg6 h5 (42...Rf1 43.Nf1 Kh5 44.Rg8 f4 45.Kh3 fe3 46.g4) 43.Ndf5 Rf5 44.Nf5 1-0. cipiripi (2275) - toughbreak (2220), Rated Blitz game, lichess.org, 2015.

4.Nf3 Nf6 5.Be2 e5 6.Bb2 d6 7.0-0=+.

4.Nf3 g6 5.Bb2 Nf6 6.Bc3 Qc7 7.Bf6 ef6 8.Nc3 (8.d4 d5=) 8...d5 9.Be2 b5 (9...Ba3 10.Qb1+=) 10.a4 b4 11.Nb1 c5 12.Bb5 Bd7 13.Bd7 Nd7 14.d4 (14.0-0 Bd6=) 14...c4 15.h4 (15.Qe2!?=) 15...Bd6 (15...Qc6 16.Qe2–/+) 16.h5 0-0 (16...Qc6 17.hg6 fg6 18.a5–/+) 17.0-0 (17.Nfd2 Ra5+=) 17...f5 18.Nbd2 (18.Re1 Ra5–/+) 18...Ra5 19.Qe2 (19.Ng5 h6 20.hg6 hg5–/+) 19...Rfa8–+ 20.hg6 hg6 (20...fg6 21.Ng5–+) 21.Rfc1 Ra4 22.Ra4 Ra4 23.Qd1 Qa5 24.Ng5 Nf6 25.Qf1 (25.Ngf3 Ne4–+) 25...Ra2 26.g3 Kg7 27.Nb1 b3 (27...Ne4 28.Ne4 fe4 29.Qd1–+) 28.cb3 cb3 29.Rc3 (29.Rc6 Qb4 30.Qc1 Ne4 31.Ne4 b2–+) 29...Rb2 30.Rd3? (30.Rc1–+) 30...Ng4 31.Nh3 Bb4 32.Rd1 Qc7 (32...Qc7 33.Rc1 Qc2–+) 0–1. Valverde,Mario (2030) – Wittig,Frank (2280), CiF, 2010.

4.Bb2 Qa5 5.Be2 Nd7 =.

4.d4 Qa5 (4...Ra5 5.Nf3=) 5.Bd2 Qc7 6.c4 Nf6 7.cd5 (7.Nf3 Bg4=) 7...cd5 8.Nc3 (8.Bd3 Nc6=) 8...Nc6 9.Nf3 (9.Rc1 e6=) 9...Bg4 10.Be2 (10.h3 Bf5=) 10...e6 11.0-0 (11.Rb1 Ne4 12.Ne4 de4=) 11...Be7 12.h3 Bh5 13.Rc1 Qb8 14.Ne5 (14.Qb3 0-0=+) 14...Ne5 (14...Be2 15.Qe2 Ne5 16.de5 Qe5 17.Qb5 Nd7 18.Qb7=) 15.de5 (15.Bh5 Nc4 16.Be2 b5=+) 15...Be2 16.Qe2 Nd7 17.Qb5 b6 18.f4 (18.Qc6 Qc8 19.Qb5 Qb7=+) 18...Qb7 19.Rc2 (19.Qb1 0-0=+) 19...0-0 20.Ne2 Rfc8 21.Rfc1 Rc5 22.Qb1 (22.Rc5 Nc5 23.Bb4 Nd3 (23...Ra2? 24.Bc5 Bc5 25.Rc5+–) 24.Qd3 Bb4=+) 22...Qa6 (22...Rac8 23.Nd4=+) 23.Nd4 Rac8 24.Kh2 Bf8 25.Be1 (25.Bb4 Rc2 26.Rc2 Rc2 27.Nc2 Bc5=+) 25...R8c7 (25...Rc2 26.Rc2 Rc2 27.Qc2=+) 26.g3 (26.Bc3 Qd3 27.Bd2 Rc2 28.Rc2 Rc4=+) 26...Qa3 (26...Be7 27.Kg2=+) 27.Bd2–/+ Rc2 28.Rc2 Rc2 29.Qc2 Nc5 30.Bc3 Ne4 31.Nb5 Qc5 32.Qd3 Nc3 (32...Qc6 33.a4–/+) 33.Nc3 Qb4 34.Nd1 Bc5 35.Kg2 Qa4 Black begins to deal mighty blows 36.Qe2 (36.Nc3 Qa3 37.Qd2 Qa5–/+) 36...Qe4 37.Kh2 (37.Kg1 d4–/+) 37...b5 38.Qd2 h6 (38...b4 39.Qc1 Qc4 40.Qd2–/+) 39.Qc1 (39.Qc3!? Qc4 40.Qd2–/+) 39...Qc4–+ 40.Qd2 Bb4 41.Qf2 (41.Qb2 Be1–+) 41...Qd3 42.Nb2 (42.Qf3 Qd2 43.Kh1 Qa2–+) 42...Qb1 43.a4 Ba3 (43...Ba3 44.ab5 Bb2–+ (44...Qb2?? 45.Qb2 Bb2 46.b6+–)) 0–1. Rosner,Dirk – Schols,Andre, corr or001–06, 2001.

4.d4 Ra5 5.Nf3 =.

4.Nf3 f6 5.a6 (5.d4 Bg4+=) 5...Na6= 6.Ba6 (6.Ba3 Nh6=) 6...Ra6=+ 7.0-0 e5 8.d4 e4 9.Nfd2 Bd6 (9...b5 10.f3 ef3 11.Qf3-/+) 10.c4 Qc7 11.h3 Nh6 (11...Ne7 12.c5 Bh2 13.Kh1=) 12.Nc3 Bb4 13.Qb3 Bc3 14.Qc3 0-0 (better 14...Qa5!? 15.Qb2 0-0=) 15.cd5+/- f5 16.dc6 (16.f3 ef3 17.Nf3 Rd8+=) 16...Rc6 17.Qb3 (17.Qb4 Be6+=) 17...Be6 18.Qb2 f4 (18...Rc8 19.Qb4=) 19.Ne4 Rc2 (19...f3 20.Ng5 fg2 21.Rd1+= (worse 21.Kg2 Rc2 22.Qb4 Bc4=+)) 20.Qb5 (20.Qb1 f3 21.Ba3 Qc6 22.Bf8 Qe4+-) 20...f3 (better 20...Bc4 21.Qc5 Bf1 22.Qc7 Rc7 23.Kf1 fe3 24.Be3 Re7 25.Bh6 Re4=+) 21.Ng5?? (21.Ba3 fg2 22.Rfc1+- (worse 22.Kg2 Bc4 23.Qb4 Ra8=+)) 21...Bc4-+ 22.Qb1 (22.Qe5 fg2 23.Re1 (23.Qc7?? gf1Q 24.Kh2 Qf2 25.Kh1 Qg2) 23...Rcf2 24.e4 (24.Qc7 Rf1 25.Kg2 R8f2 26.Kg3 Nf5 27.Kg4 Rg2 28.Qg3 Rg3 29.Kh5 g6) 24...Qe5 25.de5 Rf1 26.Kg2 Re1 27.Nf3 Re4 28.Bh6 gh6 29.Rg1-+) 22...Bf1 (better 22...fg2 23.Rd1 Rff2 24.Qc2 Rc2-+) 23.Kf1?? (23.Ne6 Qc8 24.Nf8 Bg2 25.Ne6 Bh3 26.e4 Be6 27.Bf4-+) 23...Qh2 24.Nf3 (24.Qb3 Kh8 25.Qg8 Kg8 26.Nf3 Qh1 27.Ng1 Rff2 28.Ke1 Qg1) 24...Rf3 (24...Qh1 25.Ng1 Rcf2 26.Ke1 Qg1) 25.Qc2= Qh1 26.Ke2 Qg2 27.Qc8 Kf7?? (27...Rf8 28.Qe6 Kh8 29.Kd3=) 28.Qc4 (better 28.Qb7 Ke8 29.Qa8 Kd7 30.Qf3+-) 28...Kg6 29.Qe6 Rf6 30.Qe8 Nf7 31.Ba3 Rf2 32.Kd3 Rd2 33.Kc3 Rc2 34.Kb3 Qd5?? (better 34...Rc6 35.Bc5 Rf6+=) 35.Kc2+- Qc4 (35...Kh6 36.Kd3 Qf5 37.Qe4 Qb5 38.Kc3+-) 36.Kd2 Qd5 37.Rg1 (37.Rb1!? Qa5 38.Kd1 Qa6 39.Qe4 Kh6+-) 37...Kh6 38.Bc5 (38.Kc3 Qa2 39.Bf8 Qa5 40.Kb3 Ng5+-) 38...Qa2 39.Kd3 (better 39.Kc3 Qf2 40.Qe6 Qf6 41.Qf6 gf6 42.h4+-) 39...Qe6 (39...Qb3 40.Ke2 Qc2 41.Kf1 Qf5 42.Ke1 Qb1 43.Kf2 Qf5 44.Kg2 Ng5=) 40.Qe6 (40.Qe6 Kh5 41.Qg4 Kh6 42.Qh4) 1-0. onxisback (2180) - bikhial (2160), Rated Bullet game, lichess.org, 2014.

4.Nf3 Nf6 5.d4=.

4.a3 d5 5.Bb2 =.

4.a3 e5 5.Nf3 e4 6.Ng1 (6.Nd4 d5=) 6...g6 (6...cb5!? 7.Nc3 Nf6=) 7.Bb2+= Nf6 8.bc6 (8.d3!?+=) 8...dc6= 9.Be2 (9.Nc3 Bg4 10.f3 ef3 11.Nf3 b5=) 9...Bg7 (9...Bd6 10.Nc3 0-0 11.d3+=) 10.d3 ed3 11.cd3 0-0 12.Nf3 Nbd7 (12...Qa5 13.Bc3 Qd5 14.Bf6 Bf6 15.d4+=) 13.0-0 Nc5 (13...Re8 14.Nc3=) 14.Nc3 (14.d4 Nd5=) 14...b5 (14...Nb3 15.Rb1=) 15.d4+= Nb3 16.Rb1 Bf5 17.Bd3 Bg4 (17...Bd3 18.Qd3 Re8 19.Qc2=) 18.Be2 (18.h3 Bh5+=) 18...Nd5 (18...Bf5 19.Bd3 Bg4=) 19.Nd2 (19.Qc2 Re8=) 19...Nc3 (better is 19...Bf5!?+=) 20.Bc3= Bf5 (20...Be2 21.Qe2 Qd5 22.Qf3=) 21.Rb2 Nd2 22.Qd2 Be4 23.Qd1 (23.Rc1 Qg5 24.f3 Bd5+=) 23...Qg5 Do you see the mate threat? 24.Bf3 f5 (24...Rfe8 25.Be4 Re4 26.Qf3=) 25.Be4 (25.Bb4 Rfe8+=) 25...fe4= 26.Qc2 Rae8 27.Bb4 Rf6 28.Qc5 Qh6 29.Rc2 Attacking the backward pawn on c6 29...Ree6 (29...Bf8 30.Qc3 Qg5 31.Bc5=) 30.d5 (30.Rfc1 Qh4=) 30...Re5 31.Rd2 Rh5 (31...cd5 32.Qb5 Qg5=) 32.h3 (32.Bc3 Rh2 33.f4 Rh1 34.Kf2 Rf4 35.Ke2 Qh5 36.Rf3 Rf3 37.Rd4 Rff1 38.g4 Qh2) 32...Bf8 (32...Rg5 33.Kh2 Rff5 34.Qc6 Rg2 35.Kg2 Rg5 36.Kh2 Be5 37.f4 ef3 38.Kh1 Qh3 39.Rh2 Qf1) 33.Qd4 (better is 33.Qc3!? Bb4 34.ab4+=) 33...Bb4+= 34.Qb4 Qf8 (34...Rd5 35.Rd5 cd5 36.Qb5+=) 35.Qf8 Kf8 36.Rfd1 (36.d6 Ke8+=) 36...cd5 (36...Ke7 37.dc6 Rc6 38.Kf1=) 37.Rd5+= Rd5 38.Rd5 Rf5 39.Rd4 Re5 40.Kf1 (40.Rd7 Re7 41.Rd8 Kg7=) 40...Ke7= 41.Ke2 h5 42.h4 Ke6 43.f3 ef3 44.gf3 g5 45.f4 gf4 46.Rf4 Rc5 47.Kd3 Rd5 48.Ke2 Ke5 49.Rb4 Kd6 (49...Rc5 50.e4=) 50.Kf3 (50.Rd4 Rd4 51.ed4 b4–+) 50...Rc5= 51.Ke2 (51.Ke4 Rc4 52.Rc4 bc4+–) 51...Kc6 (51...Rc4 52.Rb5 Rh4 53.Kd3=) 52.Kd3 Rc1 53.e4 (better is 53.Rf4=) 53...Ra1–/+ 54.Kd4 (54.e5 Ra3 55.Kd4 Rh3–+) 54...Ra3–+ 55.e5? (better is 55.Rb2–+) 55...Rh3 56.Rb1 Rh4 57.Kd3 a3 (57...b4 58.e6–+) 58.Rc1 (58.e6 Rh3 59.Kd4 b4–+) 58...Kd5 59.Rb1 (59.Re1 Rd4 60.Kc2 Ke6–+) 59...b4 (59...b4 60.e6 Ke6–+) 0–1. Ruhle,Ernst Albrecht – Lietz,W, Velden GER, 1995.

4.Bb2 Qb6 5.c4 cb5 (5...d6 6.a3+=) 6.cb5 Nh6 (6...d5 7.Nf3+=) 7.Bc4 (7.Qc2 Kd8+/–) 7...e6 (7...d5 8.Bd5 Qb5 9.Qc2=) 8.Nf3 d5 9.Bd3 (9.Be2 f6+=) 9...Ng4 (9...f6 10.Qc2 Bd7 11.Bd4=) 10.0-0 (10.Bd4 Qd6 11.h3 Nf6+=) 10...Nd7 11.Qc2 (11.a3 e5 12.Nc3 Qd6+=) 11...Nc5 12.Be2 (12.Bd4 Qd6 13.Rc1 Nd3 14.Qd3 Bd7=) 12...Bd7 13.Ng5 (13.Bd4 Qd6+= (13...Bb5? 14.Qb2+–)) 13...Bb5 (13...Nf6 14.Bf6 gf6 15.Nh7=) 14.Bg4+= Bf1 (14...Bd3 15.Qc3 Bf1 16.Kf1=) 15.Kf1 Ne4 (better is 15...h6!? 16.Nh3 Qc6+=) 16.Ne4+/– de4 17.Bd4 Qb5 (17...Qc6 18.Nc3+–) 18.Kg1 (18.Be2 Qd7+–) 18...e5 (18...Qc6 19.Nc3+–) 19.Nc3 (19.Qe4 Ra5+–) 19...Qa5? (better is 19...Qd3 20.Qd3 ed3 21.Be5 Ra5+–) 20.Qe4 Bd6 21.f4 0-0 22.fe5 Rae8 23.Qb7 Be5 24.Be5 Qe5 25.Rf1 Re7 26.Qb4 Qg5 27.Rf5 Qh4 28.g3 (28.g3 Rb7 29.Qf8 Kf8 30.gh4+–; 28.Na4?! h5+/–) 1–0. Wall,Bill – Spiderman, internet, 2005.

4.Bb2 d5 =.

4.Bb2 d6 5.d4 Nf6 6.Nf3 d5 7.c4 =.

4.Nc3 d5 5.bc6 bc6 6.d4 Nf6 7.Bd3 =.

4.c4 cb5 5.cb5 A) 5...d6 6.Nc3 (6.Nf3 Nf6 7.Nc3 Nbd7 8.Ba3 g6) 6...Nf6 7.Nf3 Nbd7 8.Ba3 g6; B) 5...Nf6 6.Nc3+= (6.Nf3 d6 7.Nc3 Nbd7 8.Ba3 g6) 6...d6 7.Nf3 Nbd7 8.Ba3 g6.

4.c4 d6 5.Nc3 (5.Nf3 cb5 6.cb5 Nf6 7.Nc3 Nbd7 8.Ba3 g6) A) 5...Nd7 6.Nf3 (6.d4 g6 7.Nf3 Ngf6 8.Bd3 Bg7) 6...Ngf6 7.d4 Nb6 8.Bd3 cb5; B) 5...Nf6 6.Nf3 cb5 7.cb5 Nbd7 8.Ba3 g6.

4.c4 e6 5.Nc3 (5.Nf3 cb5 6.cb5 Nf6 7.Nc3 d5 8.d4 Nbd7) 5...a3 (5...cb5 6.Nb5 (6.cb5 Nf6 7.Nf3 d5 8.Na4 Bd6) 6...Nc6 (6...Nf6 7.Nf3 Nc6 8.Bd3 Bc5) 7.Nf3+= Nf6 8.Bd3 Bc5; 5...Nf6 6.Nf3 cb5 7.Nb5 Nc6 8.Bd3 Bc5; 5...d5 6.Qc2 Nf6 7.Nf3 Nbd7 8.bc6 bc6) 6.Nf3 (6.d4 Nf6+– (6...cb5 7.Nb5 Nf6 8.Nf3 Nc6) 7.Nf3 cb5 8.Nb5 Nc6; 6.Be2 Nf6 7.Nf3 cb5 8.Nb5 Nc6; 6.Bd3 Nf6 7.Nge2 Bc5 8.Na4 Be7) 6...d5 (6...Nf6 7.d4+– (7.Be2 cb5 8.cb5 d5) 7...cb5 8.Nb5 Nc6) 7.d4 (7.Qb3 Nf6+– 8.d4 Be7; 7.cd5 cd5 8.d4 Nf6) 7...Bb4 (7...Nf6 8.Qb3+– (8.Bd3 cb5) 8...Be7) 8.Bd2 (8.Qb3 Qe7+– 1.48/9 (8...Qa5 9.Bd2 Nf6+–)) 8...Bc3 (8...Nf6 9.Qb3 Be7 10.Bd3+–) 9.Bc3 cb5 (9...Ne7!? 10.Qc2+–) 10.cb5+– Ne7 (10...Nd7 11.Bb4+–) 11.Bd3 h6 (11...Nd7 12.Bb4+–) 12.0-0 0-0 13.Bc2 (13.Bb4!? Nd7+–) 13...Nd7 14.Qd3 (14.Bb4 Re8+–) 14...f5 (14...Ng6 15.Rac1+–) 15.Bb4 Nb6 (15...Rf7 16.Ba3 Ng6 17.Bb4+–) 16.Ne5 (16.Ba3 Nc4 17.Bb4 b6+–) 16...Bd7 (16...Rf6 17.Rac1+–) 17.Rab1 (17.Qb3 Nc4+–) 17...Rf6 18.Rb3 (18.Bd1 Be8+–) 18...Ng6 19.Ra3 (19.Nd7 Qd7 20.Ra3 (20.Ba3?! e5+=) 20...Ra3 21.Qa3+–) 19...Ne5? (19...Ra3 20.Qa3 Bb5 21.Ng6 Rg6 22.Rc1+–) 20.Ra8 (20.de5 Ra3 21.Qa3 Rf7+–) 20...Qa8 (20...Nf3!? 21.gf3 Qa8+–) 21.de5+– Rg6 (21...Rf7 22.Bb3+–) 22.a4! Nc4 (22...Na4 23.Ra1 Decoy) 23.Qd4 Qb8 (23...b6 24.Rc1+–) 24.f4 Qd8 (better 24...Qa8+–) 25.Bf5! ef5 26.Qd5 Kh7 27.Qc4 Be6 28.Qd4 (better 28.Qc2+–) 28...Qh4 (28...Qa8 29.Bd6+–) 29.Qd1 (29.a5 Qh5 30.Rf2 Qg4+–) 29...Bg8? (29...Qh3 30.Qf3 Qf3 31.Rf3+–) 30.Qf3 (better 30.Qd3 b6+–) 30...Qd8 31.Rd1 (31.Bd6 Qb6+–) 31...Qc7 32.Qe2 Bb3 33.Rd6 (better 33.Ra1!? Qf7 34.Qd2 Qe6+–) 33...Ba4 34.Rg6 (better 34.h3!?+–) 34...Kg6+– 35.e6 (35.Bd2 Qc2+=) 35...Qb6 The isolani on b5 becomes a target (35...Qc2!? 36.Qe1 Qd1+=) 36.e7+– Bb5 37.Qd2 (37.Qe1 Kf7+–) 37...Qe6 38.h3 (38.Kf2 Bc6+–) 38...Bc6 (38...Kf7 39.Kf2+–) 39.Qd6 ½–½. Nikolaev,Dmitriy – An,Yuriy, Chervonny, 2007.

4.c4 Nf6 A) 5.Nc3 d6 (5...cb5 6.cb5 d6 7.Nf3 Nbd7 8.Ba3 g6) 6.Nf3 cb5 7.cb5 Nbd7 8.Ba3 g6; B) 5.Nf3 d6 (5...cb5 6.cb5 d6 7.Nc3 Nbd7 8.Ba3 g6) 6.Nc3 cb5 7.cb5 Nbd7 8.Ba3 g6.

4.Nf3 Nf6 5.Be2 d5 6.Bb2 Bg4 7.Bf6 =.

4.Bb5 e6 5.c4 b6 6.Qf3 Ra7 7.Bb2 Nf6 8.Nh3 Bb7 9.Bf6 gf6 10.Qg3 Nc6 11.0-0 Ne7 12.Qd6?? (12.f3 Nf5 13.Qf2 Qc7=) 12...Nf5?? (better 12...Bg2 13.Kg2 Qa8 14.f3 Rg8 15.Kh1 Nd5 16.Qf8 Kf8 17.cd5 Qd5-+) 13.Qd3= Nh4 14.Nf4 (14.e4 Rg8 15.g3 f5=) 14...f5 (14...Bg2 15.Ng2 Rg8 16.Qh7 Rg2 17.Kh1-/+) 15.f3= Rg8 16.Qe2? (16.Kh1 e5 17.Nd5 Rg2 18.Nf6 Ke7 19.Nd7 Bg7=) 16...Bd6 (16...e5!? 17.g3 ef4 18.ef4 Qe7-+) 17.g3 (17.Rf2=+) 17...e5 (better 17...Qa8!? 18.Qd3 Ke7-+) 18.Ng2 (18.Nd5 Bd5 19.cd5 e4 20.fe4 Bg3+=) 18...Ng2 19.Kg2 Qg5 (19...h5!?=+) 20.Nc3= h5 21.Nd5 h4 22.Qf2 (22.Nb6!? hg3 23.h3= (worse 23.Bd7 Kd8 24.h3 Ra6-/+)) 22...Bd5=+ 23.cd5 f4 24.g4 f5 25.h3 Bc5 (worse 25...fg4 26.fg4 Rc7 27.Rae1 fe3 28.Qf7 Kd8 29.de3+=) 26.Rae1 Ke7 (26...fe3 27.de3 Rc7=) 27.d4 (27.Re2!? Kd8 28.a4=+) 27...fe3-/+ 28.Qe3 (28.d6 Kd8 29.Qe3 Qe3 (worse 29...Bd4 30.Qg5 Rg5 31.f4 ef4 32.Rf4+=) 30.Re3 Bd4=+) 28...Qe3 (28...fg4? 29.Qg5 Rg5 30.f4+- (30.dc5?! gf3 31.Kf3 bc5+-)) 29.Re3 Bd4 30.Rd3 (30.Re2!? Kd6-/+) 30...Rc7-+ 31.Rd2 Kf6 (better 31...Kd6!?-+) 32.f4 (32.d6 Ra7 33.f4 fg4 34.Re2=+) 32...Be3 (32...fg4 33.hg4 Be3 34.fe5 Ke5 35.Rf5 Kd6 36.Rf6 Ke7 37.d6 Kf6 38.dc7 Bd2 (38...Rg4? 39.Kh3 Rg8 40.Rd6 Ke5 41.Rd7+-) 39.Bd7 b5-/+) 33.fe5+= Ke5 34.Rf5 Kd6 35.Re2 Bg5 36.Rf7 Kd5? (36...Rd8 37.Ba6+=) 37.Rd7 (better 37.Rf3!? d6 38.Rd3 Kc5 39.Rc2 Kb5 40.Rc7+-) 37...Rd7= 38.Bd7 Kd6 ½-½. Mely (2255) - Zeitgeist (2235), ChessWorld.net, 2016.

4.Bb5 e6 5.Nf3 Be7 6.e4 (6.Bb2 Nf6+/–) 6...Nf6+= 7.d3 (7.e5 Ne4 8.Qe2 f5+=) 7...Nc6 (7...0-0 8.e5 Nd5 9.c4=) 8.a4 (8.e5 Ng4 9.d4 0-0+=) 8...Qc7 (8...d5 9.ed5 Nd5 10.Ne5=) 9.Bb2 (9.0-0 0-0+=) 9...d6 10.0-0 0-0 11.Re1 (11.Nbd2 d5=) 11...e5 12.h3 Nd7 (12...Be6 13.d4 ed4 14.Nd4=) 13.Bc4 (13.d4 f5 14.Bc4 Kh8=) 13...Nb6 14.Bb3 (14.Nbd2 Nc4 15.Nc4 Be6=) 14...Be6 15.Na3 Bb3 16.cb3 f5 17.Nb5 Qd7 18.Rc1 fe4 (18...Rac8 19.d4 fe4 20.Re4=) 19.de4+= Rf6 20.Qe2 Raf8 21.Qe3 Nc8 22.Red1 Rf3 23.gf3 A deflection (23.Qf3 Rf3) 23...Qh3 24.f4 (24.Qd3 Rf3 (24...Qf3?! 25.Qf3 Rf3 26.Rc3=) 25.Qd5 Kh8–/+) 24...Qg4+= 25.Qg3 Rf4 26.Qg4 (better is 26.Nc3!?+=) 26...Rg4–/+ 27.Kf1 Re4 28.Rd3 (28.Rc4 Rf4–/+) 28...Rf4 29.Ke2 h5 30.Rh3 h4 31.f3 (31.Rd1 g5–+) 31...Nb6 32.Ba3 Nd4 (32...d5!? 33.Be7 Ne7 34.Nd6–+) 33.Nd4 Rd4 (33...ed4 34.Rc7 Kf7 35.Bd6+–) 34.Rc7 Nd5 35.Rc8 Kf7 36.Bc1 Rb4 (36...Rb4 37.Be3 Rb3–+) 0–1. Dubleumortier,Alain – Myrberg,Johnny, corr 3GMM–39, 1996.

4.Bb5 g6 5.Bb2 Nf6 6.Nf3 Bg7 7.0-0 0-0 8.d3 b6 9.Nbd2 Bb7 10.Nc4 d5 11.Nce5 Nbd7 (11...Ne8 12.Ng5=) 12.Nc6 Bc6 13.Bc6 Rc8 14.Bb5 Qc7 15.c4 dc4 16.Bc4 Ng4 17.Bg7 Kg7 18.h3 Nge5 19.Ne5 Ne5 20.Bb3 Qd6 21.d4 Nc6 22.Qf3 (22.Rc1 e6+=) 22...b5 (22...e5 23.de5 Ne5 24.Qe4=) 23.Rac1 a4 (23...e6 24.a4 b4 25.Rc2=) 24.Bc2 (24.Bd5 Na7+=) 24...Nb4 25.Bb1 Qe6 (25...Rc4 26.Rc4 bc4 27.Rc1+=) 26.a3 Na6 27.Be4 Rc1 28.Rc1 b4?? (28...Qa2 29.Rc6 Qa1 30.Kh2+=) 29.Bd3?? (29.Rc6 Qb3 30.Ra6 Qa3+-) 29...b3?? (29...ba3 30.Qb7 Nb8 31.Rc4+=) 30.Qc6?? (better 30.Rc6!? Qd7 31.Ra6 Rc8+-) 30...Nb8? (better 30...b2 31.Rc4 Rb8+=) 31.Qe6 fe6 32.Rc4 (32.Bb5 e5+-) 32...Nd7 33.Ra4 Rc8 (33...Rb8 34.Ra7 Nb6 35.Re7 Kf6 36.Rh7+/-) 34.Rb4 Rc3 35.Be4 Nf6 36.Bb7 (36.Bf3 Rc1 37.Kh2 Rb1+-) 36...Kf7 (36...Nd5 37.Bd5 ed5 38.a4+/-) 37.a4 (37.e4 g5+-) 37...Rc1 (better 37...Nd5!? 38.Bd5 ed5+/-) 38.Kh2+- Ra1 39.Rb3 Ra4 40.Rb6 Ra2 41.Kg3 Nh5 (41...Ra5 42.Ra6 Rf5 43.f4+-) 42.Kf3 Nf6 (42...Ra5 43.g4 Nf6 44.Bc8+-) 43.g4 (43.Bc8 Ra7+-) 43...g5 (43...Nd5 44.Rb3+-) 44.Bc8 Nd5 (44...Ra7+-) 45.Be6 Kg7 46.Bd5 Ra1 (46...Ra7 47.Ke4+-) 47.Rb7 Kf6 48.Rb6 Kg7 49.Be4 Rh1 50.Kg2 Rc1 51.Re6 Kf8 (51...Rc7 52.Re5 h6 53.Re6+-) 52.Re5 (52.Bh7!? Kf7 53.Rg6 Rc8 54.Rg5 Rc6+-) 52...h6 53.Re6 h5 54.gh5 g4 (54...Rc8 55.h6 Kf7 56.Bd5+-) 55.hg4 Kg7 56.g5 Kf7 57.d5 Rd1 58.h6 Rd2 59.g6 (59.Bg6 Kf8 60.Rc6 e5 61.Re6 Rf2 62.Kf2 Kg8 63.Re8) 59...Kf8 (59...Ke8 60.h7 Rd1 61.h8Q Kd7 62.Rc6 Rg1 63.Kg1 e5 64.Qc8 Ke7 65.Re6) 60.g7 Kg8 61.Re7 (61.Rc6 e5 62.Rc8 Kf7 63.g8Q Kf6 64.Qg7) 61...Rf2 62.Kg3 (62.Kf2?!) 62...Rf8 (62...Rf3 63.Bf3 Kh7 64.Be4 Kh6 65.g8N Kg5 66.Re5) 63.Re8! (63.Re8 Re8 64.Bf5+-) 1-0. pacalmisu (2155) - carlos78 (2225), Rated Blitz game, lichess.org, 2015.

5.Bb2 Bb7 6.Nf3 f6 7.g4 (7.0-0!?+–) 7...e5 8.g5 Nc6 9.gf6 Qf6 10.d3?? (10.Rg1 Na7 11.Ne5 Nb5 12.Qh5 g6+–) 10...Bb4 (10...Nd4 A) 11.Bd4?? Bf3 (11...Qf3?! 12.Qf3 Bf3 13.Rg1 ed4 14.Nd2–+; 11...ed4?! 12.e4=+) 12.Be5 Qf5–+; B) 11.Nd4 Bh1 12.Qg4–/+) 11.Nbd2? (11.c3 Bc5 12.Nbd2 Na7=) 11...Na7 (better 11...Nd4! 12.Nd4 Bh1–/+) 12.c3= Be7 (better 12...Bc5 13.c4 Bb4=) 13.d4?? (better 13.c4 Bb4 14.e4 Nb5 15.cb5=) 13...Ba6?? (13...ed4!? 14.c4 Nb5 15.cb5–+) 14.Ne5 (better 14.de5 Qe6 15.Ba6+–) 14...Bb5 15.Ndc4?? (better 15.c4 Ba6 16.d5–/+) 15...Bc4–+ 16.Nc4 Nc6 (better 16...Qc6 17.Rg1 Qc4 18.Rg7 Rc8 19.Qh5 Kd8 20.Rh7 Rh7 21.Qh7 Nb5–+) 17.d5 Ne5 18.Nb6?? (18.Qh5 Ng6 19.d6–+) 18...Rb8 (better 18...Qb6 19.Rb1 Qg6–+) 19.Qb3 (19.Na4 Qf5 20.Qb1–+) 19...Nd3 (better 19...Rb6!? 20.Rf1 Rb3 21.ab3 Nd3 22.Kd2 Nb2 23.Ra2–+) 20.Kd2 Qf2 (better 20...Rb6 21.Kd3 Qf5 22.Ke2 Rb3 23.ab3 Qc2 24.Kf3 Nf6–+) 21.Kd3 Nf6 (21...Bc5!? 22.Rhf1 Qe3 23.Kc4–+) 22.Rhf1? (22.Raf1 Qg2 23.Qb5 Qg6 24.e4 Qe4 25.Kd2–+) 22...Qh2–+ 23.Rae1? (better 23.c4 Bc5 24.Bf6 Rb6 25.Bg7 Rb3 26.ab3–+) 23...Qd6 (23...Qc7 24.c4 Rb6 25.Qc2–+) 24.Re2 (24.c4 Rb6 (24...Qb6?! 25.Qb6 Rb6 26.Bd4–+) 25.Qc3 h5–+) 24...Rb6 (24...Qb6?! 25.Qb6 Rb6 26.c4–+) 25.Rfe1 (25.Ba3 Qc7 26.Qa4 Ba3 27.Qa3 Nd5 28.Rf5–+) 25...Rb3 26.e4 Rb2! 27.e5 (27.Rb2 h5 Passed pawn) 27...Re2 (27...Qd5 28.Ke3 Ng4 29.Kf4 Rf8 30.Kg4 Qf3) 28.ed6–+ Re1 (28...Re1 29.a3 Bd6–+) 0–1. Agiant – k_8, lichess.org, 2019.

5.Nf3 Bb7 6.0-0 Nc6 7.d4 e6 8.Bb2 Nf6 9.Nbd2 Be7 10.a3 0-0 11.Bd3 Ba6 12.c4 d5 13.Qe2 Rc8 14.Rac1 dc4 15.Nc4 Nd5 16.g3 Bf6 (better is 16...Bb7!?=) 17.e4+/– Nc7? (17...b5 18.Ncd2 Bd4 19.Nd4 Nd4 20.Bd4 Nf4 21.gf4 Qd4+–) 18.Nb6 Bd3 (18...Nd4 19.Bd4 Bd4 20.Nd4 (20.Nc8?! Bd3 21.Ne7 Kh8+/–) 20...Qd4 21.Nc8 Bd3 22.Rfd1 Be2 23.Ne7 Kh8 24.Rd4+–) 19.Qd3 Nd4 (19...Qd6 20.Rfd1 Na7 21.Nc8 Rc8 22.e5+–) 20.Nd4 (better is 20.Bd4 Rb8 21.Nc4 Bd4 22.Nd4+–) 20...Rb8 21.Nc4 e5 22.Rfd1 ed4 23.Bd4 Bd4 24.Qd4 Qd4 25.Rd4 Ne6 26.Rd5 a4 27.Rcd1 (27.Kg2 h6+–) 27...g6 (27...Rfc8 28.Nd6 Rc3 29.Ra1+/–) 28.Ne5 (28.Ra5!? Ra8+–) 28...Rb3+/– 29.R1d3 Rfb8 30.Nd7 R8b7 31.Nf6 Kg7 32.e5 Rd3 33.Rd3 Rb3 34.Rd7 Ra3 35.Ra7 (better is 35.Ne8!? Kg8 36.Nd6+=) 35...Ra1= 36.Kg2 Nc5 (36...g5!?=) 37.Ne8+= Kf8 38.Nd6 Nd3?? (38...Kg8!?+/–) 39.Rf7+– Kg8 40.e6 Re1 41.e7 a3 42.Rf3 (better is 42.Rf8 Kg7 43.e8Q Re8 44.Re8+–) 42...a2?? (better is 42...Re7 43.Rd3 Rd7+/–) 43.Rd3 (43.Re3 Kg7 44.e8Q+– (44.Rd3?! a1Q 45.e8Q Re8 46.Ne8 Kf7 47.Nd6 Ke6=)) 43...a1Q= 44.e8Q?? (better is 44.Re3 Re3 45.fe3 Qa2 46.Kf1 Qb1 47.Kg2 Qa2 48.Kf1 Qa6 49.Kf2 Qa2 50.Kf1=) 44...Re8–+ 45.Ne8 Qa8 46.f3 Qe8 47.Rd4 (47.Kf2 g5–+) 47...Qe2 48.Kh3 Qf3 49.Rf4 Qe3 (better is 49...Qe2 50.Rg4 Qf1 51.Kh4 Qf2–+) 50.Kg2 Kg7 0–1. ferminkatcho (1770) – kmisior (1915), kurnik, 2012.

5.Nf3 Bb7 6.0-0 Nf6 7.Nc3 g6 8.Rb1 Bg7 9.Ba3 0-0 10.Qe2 d6 11.Na4 Nbd7 12.Bb2 Nc5 13.Bd4 Na4 (13...e5!? 14.Bb2 Na4 15.Ba4 Rc8=) 14.Ba4+= The backward pawn on b6 becomes a target 14...Nd5 15.Bg7 Kg7 16.Bb3 (16.c4 Nf6+=) 16...e6 (16...Qc7 17.a4+=) 17.Qd3 (17.Bd5!? Bd5 18.c4 Bf3 19.Qf3+= (worse 19.gf3 Rc8=)) 17...Rc8 18.Qd4 f6 (18...Nf6 19.Ng5 Rc5 20.f4=) 19.Rfc1 Rc5 20.Ne1 e5 21.Qh4 f5 22.Qd8 Rd8 23.Nd3 (23.c4 Ne7=) 23...Rc7 24.Bd5 (24.c4 Nf6 25.f3 g5=) 24...Bd5=+ 25.Rb6 Be4 (better 25...Ba2 26.Nb2 e4=+) 26.Ne1+= Rdc8 (26...Bd5 27.Rcb1+=) 27.Rb2 (27.Rd6 Bc2 28.Ra6+– (worse 28.Nc2 Rc2 29.Rc2 Rc2=+)) 27...d5?? (better 27...Bd5+=) 28.f3+– d4 29.fe4 de3 (29...fe4 30.Rb5 Rc5 31.Rb7 R8c7 32.Rcb1+–) 30.de3 fe4 31.Kf2 Rc3 32.Ke2 Rd8 (32...Kf6 33.Rd1+–) 33.Rb3 (33.Rb5 Ra3+–) 33...Rc5 34.Rd1 Rdc8 (34...Rd1 35.Kd1 Kf6 36.Ke2+–) 35.Rd7 Kh6 36.Rbb7 Kg5 37.Rh7 a4 38.Rbf7 (38.h4 Kf5+–) 38...a3 (38...Rc2 39.Nc2 Rc2 40.Kf1 Ra2 41.h4 Kg4 42.Rh6+–) 39.Kf2 (39.h4 Kg4+–) 39...Rb5 (39...R5c6+–) 40.Kg3 (40.Kg3 Rc2 41.h4). FeegLood (2625) – TheYellowKing (2345), time forfeit, lichess.org, 2015.

5.Nf3 Bb7 6.0-0 Nf6 7.d4 e6 8.Nbd2 Be7 9.Bb2 0-0 10.Qe2 d5 11.c4 dc4 12.Nc4 Nbd7 13.Rac1 Rc8 14.a3 Ne4? (14...Rc7 15.Nce5+=) 15.Nce5?? (better is 15.Bd7 Rc4 16.Qc4 (16.Rc4?! Qd7 17.Ne5 Qb5+–) 16...Qd7 17.Qc7+–) 15...Ne5= 16.Ne5 Qd5 17.f3 Nd6 18.Bd3 Rfd8 0–1. ferminkatcho (1700) – kmisior (1880), kurnik, 2012.

5.Nf3 Bb7 6.0-0 g6 7.Bb2 Nf6 8.d4 Bg7 9.Nbd2 0-0 10.c4 d5 11.Qe2 Ne4 12.Ne4 de4 13.Nd2 Nd7 14.Rab1 Rc8 15.Ba3 Qc7 (better is 15...Nf6!?+/–) 16.Be7+– Rfe8 17.Bh4 Bc6 18.Bg3 Qb7 19.a4 Bb5 20.Rb5 f5 21.Rfb1 White prepares d5 21...Qc6 22.h4 Bf6 23.h5 Kg7 24.d5 Qa8 25.Nb3 Qa7 26.Nd4 Ne5 (26...Bd4 27.ed4 g5+–) 27.Rb6 Rc7 (27...Qd7 28.R6b5 Kg8 29.Be5 Be5 30.Ra5 Bd4 31.ed4 Qc7+–) 28.Ne6 Re6 29.Re6 Qc5 (29...Re7 30.Reb6 Qa8+–) 30.Be5 (30.Be5 Be5 31.Re5+–) 1–0. ferminkatcho (1800) – mikejagger (1685), kurnik, 2012.

5.a4 Nc6 6.Ba3 Na7 7.Nc3 g6?? (7...Nb5 8.Nb5 Nf6 9.Nf3+/-) 8.Nge2?? (8.Nd5 Qd8 9.Bc5 Nf6+-) 8...Bg7?? (8...Nb5 9.Nb5 Nf6 10.Rb1+=) 9.0-0 (better 9.Nd5 Qd8 10.Bc5 Nb5 11.Bb6+-) 9...Nf6 10.Rb1 Qc7 11.Nf4 Nb5 12.Nb5 (worse 12.ab5 Qd8=) 12...Qd8 13.c4 d6 14.d4 Bd7 15.Ne2 (15.f3 0-0+=) 15...0-0 16.Nec3 Rc8 17.Qd3 Bf5 18.e4 Bd7 19.f3 Nh5 20.Rfe1 (20.Bc1!?+/-) 20...Nf4= 21.Qd2 e5?? (better 21...Ne6 22.Qd3 Nf4=) 22.Nd6+- Qg5 23.Kh1 (23.Nc8?? Nh3 24.Kh1 Qd2 25.Ne7 Kh8-+) 23...Rfd8? (23...Rb8 24.Nb7 Rfe8+-) 24.Nc8 Bc8 25.d5 (25.Nd5 f6 26.de5 fe5+-) 25...Bd7 (25...Qf6 26.Bc5+-) 26.Nb5 (26.Rb7 Bf6 27.Bc5 Rc8+-) 26...Rc8 (26...Rb8 27.c5 Bf8 28.g3+-) 27.g3 (27.Nd6 Rd8+-) 27...Bb5 28.gf4 (better 28.Rb5 Qh5 29.Qe3+-) 28...ef4?? (28...Qh5 29.Rb5 Qf3 30.Kg1 Qa3+-) 29.cb5 Bc3 (29...Qh5 30.Rb3 (30.Qf4?! Be5 31.Qd2 Qf3 32.Qg2 Qa3=) 30...Bf6 31.Rc1 Rc1 32.Qc1+-) 30.Qc2 Qh5 (30...Qh4 31.Rbc1 Qh3 32.Rf1+-) 31.Rf1 Qh3 (31...h6 32.Bb2 Qe5 33.Rfc1+-) 32.Rbc1 Rc7 33.Qd3 (better 33.d6 Be1 34.Qg2 Qg2 35.Kg2 Rc1 36.Bc1 Bh4+-) 33...h6 (33...Rc8 A) 34.Rc3? Rc3 35.Qe2 Rc2-+ (35...Ra3?! 36.Kg1=+); B) 34.d6 Qe6 35.Rc3+-) 34.Bb2 (34.Rc3? Rc3 35.Qe2 Rc2-+ (35...Ra3 36.Qg2 Qh5 37.d6-/+)) 34...Be5 (34...Bb2 35.Rc7 Be5 36.Rb7 Qc8+-) 35.Be5 Rc1 36.Rc1 Kh7 37.Qf1 (37.Bb2 Kg8 38.d6 Qe6 39.d7 Kh7 40.d8Q g5 41.e5 Kg7 42.Rc8 Qc8 43.e6 Qc3 44.Bc3 f6 45.Bf6) 37...Qh5 38.Bd4 g5 (38...Qh4 39.Rc8 g5 40.d6 b6 41.d7 Kg6 42.d8Q Kh5 43.Qe8 Qg4 44.fg4 Kg4 45.Qg2 Kh5 46.Qf7 Kh4 47.Bf2) 39.Rc8 g4 (39...Qh4 40.d6 Kg6 41.d7 Kh5 42.d8Q g4 43.Rc5 Qg5 44.fg4 Kg4 45.Qg2 Kh4 46.Rg5 hg5 47.Qdg5) 40.Qg2 g3 (40...f6 41.d6 Qg5 42.d7 Qg8 43.Rg8 Kg8 44.d8Q Kg7 45.Qf6 Kg8 46.Qg7) 41.e5 (41.Rh8 Kg6 42.Rg8 Kh7 43.Rg7 Kh8 44.Rg3 Kh7 45.Rg7 Kh8 46.Rf7 Qe5 47.Be5) 41...Qf5 42.Qc2 Kg6 43.d6 Kg5 (43...g2 44.Qg2 Kh5 45.d7 Qb1 46.Bg1 Qg6 47.Qh3 Kg5 48.Qg4) 44.Qf5 Kf5 45.d7 (45.d7 g2 46.Kg2 f6 47.d8Q fe5 48.Qd7 Kf6 49.Rf8 Kg6 50.Be5 b6 51.Qf5) 1-0. norba94 (2250) - carlos78 (2230), Rated Blitz game, lichess.org, 2015.

5.a4 Nc6 6.Bb2 Nf6 7.Nf3 d6 8.0-0 Bd7 9.d4 e6 10.c4 Be7 11.Nc3 0-0 12.d5 ed5 13.cd5 Nb4 14.Ba3 Bb5 15.Nb5 Nd7 16.Rb1 Bf6 17.Bb4 ab4 18.Rb4 Nc5 19.Nfd4 Bd4 20.Qd4 (20.Rd4?! Na4 21.Qb1 Rfc8+=) 20...Na4 21.Qb6 Nb6 22.Nd6 Nd5 23.Rb7 Ra2 24.Rfb1 Nc3 25.R7b2 Rb2 26.Rb2 g6 27.g3 h5 28.Rb7 Nd5 (28...f5 29.Rc7 Nd5 30.Ra7+/–) 29.Kg2 Nf6 30.h3 g5 31.e4 Kg7 32.e5 Ne8 33.f4 (33.Ne4!? g4+–) 33...Nd6 34.ed6 gf4 35.gf4 Kf6 36.Kf3 Rd8 37.d7 Ke6 38.Ke4 f5 39.Kd4 h4 40.Kc5 Ke7 41.Kc6 (better is 41.Ra7 Rb8 42.Kc6+–) 41...Rf8?? (41...Ra8 42.d8Q! Kd8 43.Rh7+/–) 42.Kc7 (better is 42.Rb5+–) 42...Rd8+/– 43.Kc6 Rg8?? (43...Rf8 44.Rb5 Ra8 45.Re5 Kf6+–) 44.Rc7 (44.d8Q Kd8 45.Rb8 Ke7 46.Rg8 Kf7+–) 44...Rf8?? (better is 44...Rg6 45.Kb7 Kd8+/–) 45.Kb7 (45.Rc8 Rd8 46.Rd8 Kd8 47.Kd5 Kd7 48.Ke5+–) 45...Rd8= 46.Kc6 Rf8 47.Kd5 (47.Rc8 Rd8 48.Rd8 Kd8+–) 47...Rd8?? (better is 47...Ra8 48.d8Q! Kd8+/–) 48.Ke5+– Rf8 (48...Rb8 49.Kf5 Rb1 50.Kg5+–) 49.Ra7 (better is 49.Rc8+–) 49...Rd8 50.Kf5 Rf8 51.Ke5 Rd8 (51...Rb8+–) 52.f5 Kf7 53.Kd6 Kf6 54.Kc7 Rf8 55.d8Q (55.Ra5 Rg8+–) 55...Rd8 56.Kd8 Kf5 57.Rg7 Kf4 58.Rg4 Kf5 59.Ke7 Ke5 60.Kf7 Kf5 61.Kg7 Ke5 62.Kg6 Ke6 63.Re4 Kd5 64.Kf5 Kd6 65.Re5 (better is 65.Rh4 Kc5 66.Rc4 Kc4+–) 65...Kd7 66.Kf6 Kc7 67.Ke7 Kc6 68.Ke6 Kc7 If Black now would get Re4 in, he might survive 69.Rd5 (69.Rc5 Kb6 70.Kd6 Kb7 71.Rb5 Ka7 72.Kc7 Ka6 73.Rf5 Ka7 74.Ra5) 69...Kb6 (69...Kc6 70.Rd4 Kc5 71.Rh4 Kc6 72.Re4 Kc5 73.h4 Kb6 74.h5 Kb7 75.h6 Kb8 76.Rb4 Kc7 77.h7 Kc6 78.h8Q Kc7 79.Qe5 Kc6 80.Qd6) 70.Kd6 Kb7 71.Rc5 (71.Rb5 Ka7 72.Kc7 Ka6 73.Rf5 Ka7 74.Ra5) 71...Kb6 72.Rc6 (72.Rh5 Kb7 73.Rb5 Ka6 74.Kc6 Ka7 75.Ra5 Kb8 76.Ra3 Kc8 77.Ra8) 72...Kb5+– 73.Rc5 Kb4?? (73...Kb6 74.Rc4 Kb7 75.Rb4 Ka6 76.Kc6 Ka7 77.Rd4 Kb8 78.Rd8 Ka7 79.Rg8 Ka6 80.Ra8) 74.Rh5 Kc4 (74...Kc3 75.Rh8 Kd3+–) 75.Rh4 Kd3 76.Rg4 Ke3 77.Ke5 Kf3 78.Kf5 Ke3 79.h4 Kf3 ½–½. florenc1330 (1780) – ziomalwyluzuj (1680), kurnik, 2011.

5.a4 Nc6 6.Nc3 Nf6 7.Nf3 (7.Ba3 g6+=) 7...e5 8.Rb1 (8.0-0 Bb4+=) 8...d6 (8...Bb4!?=) 9.0-0 (9.d4 e4 10.d5 Qc5+/–) 9...Bd7 (9...Be7 10.Ba3+/–) 10.Ba3 (10.Ng5 Qd8 11.Bc4 d5 12.Bd5 Nd5 13.Nd5 Rc8+/–) 10...Be7 (10...Qc7 11.Qe2+/–) 11.Qe2 (11.d4 Qc7 12.Qd3+/–) 11...0-0 (11...Qc7!?+/–) 12.Bc6+– Qc6 13.Ne5! de5 14.Be7 Rfe8 15.Bf6 gf6 (15...Qf6 16.Rb7 Bc6 17.Rb3+–) 16.Rfc1 (16.f4 b6+–) 16...f5 17.Nb5 (17.Qd3 Be6 18.e4 fe4 19.Qg3 Kf8+–) 17...f4 18.c4 (18.Rb3 Rad8+/–) 18...fe3 (18...Bf5 19.Rb2+/–) 19.de3 (19.fe3!? Rad8+–) 19...Bf5+/– 20.Rb2 Re6 (20...Rad8 21.Rd2 Kh8 22.f3+/–) 21.h4 (better is 21.Nc3!?+–) 21...Rg6 22.f3 Bh3 (22...Rd8 23.e4 Bh3 24.Qe1+/–) 23.Qd1 (better is 23.g4 h5 24.g5+/–) 23...Bg2?? (better is 23...Qf6 24.h5 Rg3+/–) 24.Rg2+– Rg2 (24...Qf6 25.Qe2+–) 25.Kg2 Kg7 (25...Qg6 26.Kf2 Qf6 27.Qg1 Kf8 28.Qg5 Qg5 29.hg5+–) 26.e4 (better is 26.Nd6!? h6+–) 26...Qg6 27.Kf2 Qf6 28.Qg1 Kf8 29.Qg5 Qb6 (29...Qg5 30.hg5 Ra6 31.c5+–) 30.Ke2 (30.c5 Qg6 31.Qe5 Qh6 32.Qd6 Qd6 33.Nd6 Ke7+–) 30...h6 (30...Re8 31.c5 h6 32.Qd2+–) 31.Qe5 f6 (31...Re8 32.Qd6 Qd6 33.Nd6+–) 32.Qh5 Ke7 33.Qh6 (better is 33.Qg6 Qe6 34.Nc7 Rg8 35.Qh7 Qf7 36.Nd5 Kf8 37.Qh6 Qg7+–) 33...Rf8 (33...Rg8 34.Kd3 Rd8 35.Kc3+–) 34.Qf4 (better is 34.Rd1 Rf7+–) 34...Rd8 (34...Qc5 35.Nc7 Qe5 36.Nd5 Ke8 37.Ke3+–) 35.h5 Qc5 (35...Qe6 36.h6 Qe5 37.Qe5 fe5 38.c5+–) 36.Qc7 Qc7 37.Nc7 Rh8 (37...f5 38.ef5 Kf7 39.Rb1+–) 38.Nd5 Kf7 (38...Kd6 39.Nf6 Ke6 40.Nd5+–) 39.Rh1 (39.Rb1 b5 40.cb5 Rb8+–) 39...Ke6 (39...Rh6 40.Rb1 Kf8 41.Rb7 Rh5 42.c5 Rh2 43.Kd3+–) 40.h6 (40.Rb1 Rc8 41.Rb6 Kf7 42.Rb7 Kf8+–) 40...Ke5 (40...Rh7 41.Rb1 Kd6 42.Nf6+–) 41.h7 Kd4 (41...Ke6 42.Kd3 Kf7 43.Rb1+–) 42.Nf6 Kc4 43.Rg1 Kb4 44.Rg8 Rh7 45.Nh7 Ka4 46.e5 b5 (46...Kb4 47.e6 Kb5 48.e7 a4 49.e8Q Kc4 50.Qe4 Kb5 51.Rc8 Ka6 52.Qa4 Kb6 53.Qb4 Ka6 54.Ra8) 47.e6 b4 (47...Kb3 48.e7 Kc4 49.e8Q b4 50.Qa4 Kd5 51.Qb5 Ke6 52.Ng5 Kf6 53.Qd5 b3 54.Qe6) 48.e7 b3 (48...Ka3 49.e8Q Kb3 50.Qe3 Ka2 51.Kd1 b3 52.Ra8 b2 53.Ra5 Kb1 54.Qe4) 49.Rb8 Ka3 50.e8Q a4 (50...Kb2 51.Qa4 Kc2 52.Rb3 Kc1 53.Qc4) 51.Kd2 (51.Kd1 b2 52.Kc2 b1Q 53.Rb1 Ka2 54.Qa4) 51...b2 52.Kc2 b1Q 53.Rb1 (53.Kb1?!) 53...Ka2 54.Qa4 1–0. coloplayah (2175) – cruciverbalist (1845), net–chess.com, 2007.

5.a4 Nc6 6.Nf3 Nf6 +=.

5.a4 Nf6 6.Nc3 Nc6 7.Nf3 e6 8.Rb1 Bb4 9.Na2 Be7 10.Bb2 0-0 11.c4 Qc7 12.Qc2 b6 (12...d5 13.cd5 Nd5 14.d3=) 13.Ng5 (13.0-0 Bb7+=) 13...Ne5 (13...e5!?=) 14.f4 Ng6 15.0-0 Bb7 16.Nc3 h6 17.Nf3 Rac8 (17...Qd6 18.d3+=) 18.Qd3 (18.f5 Ne5 19.Ne5 Qe5+=) 18...Rfd8 (18...d5 19.cd5 Nd5 20.f5 Nc3 21.Bc3= (worse is 21.dc3 Rfd8 22.Nd4 Ne5+=)) 19.Rbc1 (19.f5!? ef5 20.Qf5+=) 19...Bc5= 20.Kh1 (better is 20.Nd4=) 20...Nf4?? (better is 20...d5=) 21.ef4+– Qf4 22.Ne2 (22.Rb1 d5 23.cd5 Qd6+/–) 22...Qg4 (22...Qe4 23.Qe4 Be4 24.d4+/–) 23.Ng3 (23.Bf6 gf6 24.Bd7 Be4–/+) 23...Ne4+/– 24.Ne4 Be4 25.Qc3 Bb4 (25...d6 26.d4 Bb4 27.Qe3+–) 26.Qe3+– Rc5 (26...d5 27.d3 Bc5 28.Qe2+–) 27.d3 Bb7 (27...Rg5 28.Rc2 Bf3 29.Rf3+–) 28.Rc2 (better is 28.Bd4+–) 28...Rdc8? (better is 28...d6+–) 29.Ne5 Qh4 (29...Qh5 30.Nd7 (30.Nf7?! Rf5 31.Rf5 ef5 32.Nh6 gh6+/–) 30...Rf5 31.Rb1+–) 30.d4 (30.Rf7 Qh5 31.Rcf2 d6+–) 30...Be4 31.Rcf2 Re5 32.de5 Bc5 33.Bd4?? (better is 33.Rf4 Be3 34.Rh4+–) 33...Bd4+= 34.Qf4? (better is 34.Rf4!? Be3 35.Rh4+=) 34...Bf2–+ 35.Rf2 Qf4 36.Rf4 Bc6 37.h3 Kf8 38.Kh2 Bb5 39.cb5 Rc5 40.Rd4 Re5 (40...Re5 41.Rd7 Re4–+) 0–1. Grosser,Wilhelm – Graf, Dresden op, 1989.

5.a4 Qg6 6.Bf1 =.

5.Nc3 e6 6.d4 Ne7 (6...Nf6 7.Nge2+=) 7.Nf3 g6 (7...Qc7 8.Bd2+=) 8.a4 Bh6 (8...Qc7 9.Ne4 f5 10.Ng3+–) 9.0-0 (9.Ba3 Qd8+–) 9...0-0 (9...Qc7 10.Ne4 f5 11.Neg5+–) 10.Ba3 Re8? (10...Qd8 11.Bd6+–) 11.Ne5 (better 11.Ne4 Kg7 12.Rb1+–) 11...d6?? (better 11...f6 12.Nc4 Qd8+–) 12.Be8 Kf8 (12...de5 13.Be7 Qc7 14.Bc5+–) 13.Bf7 (better 13.Nf7 Ke8 14.Nd6 Kd7+–) 13...de5 14.Nb5 (better 14.Qf3 Bf4 15.Qh3+–) 14...Kf7 15.Qf3 Nf5 16.Nd6 Kf6? (16...Kg7 17.Nc8 Qc6 18.de5 Qc8+–) 17.Nc8 Qc7 (17...Qc6 18.de5 Kg7 19.Qc6 Nc6+– (19...bc6?? 20.Rad1+–)) 18.Be7 (better 18.Nd6! Nd7 19.g4 ed4 20.ed4+–) 18...Kf7 (18...Kg7 19.de5 Nd7 20.Bf6 Nf6 21.ef6 Kf6 22.e4 Rc8 23.ef5 ef5 24.Rab1+–) 19.Nd6 (better 19.Bd6! Qc8 20.e4 (20.Be5?! Kg8+–; 20.de5?! Kg8+–) 20...ed4 21.ef5 ef5 22.Qd5 Kg7 23.Qd4 Kg8 24.Qd5 Kh8 25.Rab1+–) 19...Ke7+– 20.Nb7 (better 20.de5 Nd7 21.Qh3+–) 20...Qc2?? (better 20...Ra7 21.Nc5 ed4 22.ed4 Nd4=+) 21.Nc5 (21.Rac1!? e4 22.Qf5 Qc1+–) 21...Ra7 22.Nb7?? (22.Rfc1!? Qd2 23.Rcb1 Nd7+–) 22...Qb2?? (better 22...Qc6 23.e4 Nd4–+ (23...Qb7?! 24.Rab1 Qc6 25.de5=; 23...Rb7?! 24.Qa3 Ke8 25.ef5–/+)) 23.Rfb1 (23.Rab1 Qa3 24.Nc5 A) worse 24...ed4 25.Rb7 (25.Rb8 Qc5 26.e4 Nd6=+) 25...Nd7 26.Nd7 (26.Ra7?! Qc5 27.Qb7 Qd5+–) 26...Rb7 27.Qb7+–; B) 24...Nd7+–) 23...Qc3+= 24.g4 (24.Rc1 Qb4 25.Rc7 Kf6 26.g4+–) 24...Ne3= 25.fe3 Be3 (25...ed4 26.Kg2 Qd2 27.Kg3 Qe3 28.Qe3 Be3 29.Na5 Ra5 30.Rb8=) 26.Kg2 (26.Kh1 ed4 (worse 26...Bd4 27.Qc3 Bc3 28.Ra3+–) 27.Nd8 Rc7 (worse 27...Kd8 28.Rb8 Kc7 29.Rab1+–) 28.Qf7 Kd8 29.Rb8 Rc8 30.Qg8 Ke7 31.Qg7 Ke8 32.Qh8 Kd7 33.Qg7 Ke8 34.Qg8 Ke7 35.Qg7 Ke8=) 26...Qd4 (26...Nc6 27.Ra2 Nd4 28.Qe4–/+) 27.Nd8 (27.Ra2 Qd5 28.Re2 Bd4+=) 27...Kd8 (27...Qd2!? 28.Kf1 Qd3 (28...Kd8? 29.Rd1 Ke7 30.Rd2 Bd2 31.Rb1+–) 29.Kg2 Qd2 30.Kf1 Qd3 (30...Kd8? 31.Rd1 Ke7 32.Rd2 Bd2 33.Rb1+–) 31.Kg2 Qd2=) 28.Rb8+= Kc7 29.Rab1 Do you see the mate threat? 29...e4?? (better 29...Qd5+–) 30.Qf7+– Kc6 (30...Qd7 31.R1b7!! Rb7 32.Rb7 Kb7 33.Qd7 Kb6 34.Qe6 Kc5 35.Qe4 Bd4 36.Qe7 Kc4 37.Qh7 Bc5+–) 31.Rc1! Bc1 Threatening mate: Rxf7 32.Qe6 Kc5 (32...Qd6 33.Rb6! Kb6 34.Qd6 Kb7 35.Qd5 Kb8 36.Qg8 Kb7 37.Qh7 Kb8 38.Qg8 Kb7 39.Qg6 Ba3 40.Qe4 Kb8 41.Qe8 Kb7+–) 33.Qb6 (33.Rb5) 33...Kc4+– 34.Qb3 Kc5 35.Rb5 (better 35.Qb5 Kd6 36.Rd8 Ke7 37.Rd4+–) 35...Kd6–+ 36.Rd5 (36.Rb6 Ke7 37.Rb7 Rb7 38.Qb7 Kf6 39.Qc6 Kg5 40.Qc1 e3 41.Kh1–+) 36...Qd5 37.Qb6 Qc6 38.Qa7 Qa4 39.Qh7 (39.Qb8 Kd5 40.Qd8 Kc4 41.Qc7 Kd3 42.Qh7 Bf4 43.Qh3 Ke2–+) 39...Qa2 (39...Qc2 40.Kf1 Qd3 41.Kg1 Be3 42.Kg2 Qe2 43.Kh3 Qf3 44.Kh4 Qf6 45.Kh3–+) 40.Kh3 (40.Kh1–+) 40...Qa3 41.Kh4 White gets in control 41...Qc5 (41...g5 42.Kh5 Qh3 43.Kg6 Qh7 44.Kh7 e3 45.Kg7 e2 46.Kf7 e1Q 47.Kg6 Qe6 48.Kh5 Qf6 49.h3 Qg7 50.h4 Qh7) 42.Qg6 Kd5 43.Qf5 White plans g5 43...Kd4 44.Qf6 Kd3 (better 44...Qe5 45.Qf2 Kc3 46.Qe1 Kc2 47.Kh3–+) 45.Qf1 Kd4?? (45...Kc2 46.Qe2 Kc3 47.Qe4 Qf2 48.Kh3 Qe3 49.Qe3 Be3–+) 46.Qg1?? (46.Qf6 Qe5 47.Qf2 Kc3 48.Qe1 Kc2 49.Qe2 Kb1 50.Kh3–+) 46...e3 47.g5 Bd2 48.g6 Qe7 49.Kh5 Qe8 50.Qg4 Kd3 (50...Kc3 51.Qf5 a4 52.Qf6 Kc2 53.Qf5 Kb2–+) 51.Kh6 (51.Qf5 Kc4 52.Qf4 Kc3 53.Qf6 Kc2 54.Qf5 Kb2–+) 51...Qe4 (51...Qh8 52.Kg5 e2 53.Kf5 Qf8 54.Ke6 e1Q 55.Kd5 Qh1 56.Qg2 Qg2 57.Ke6 Qg6 58.Ke5 Qfd6) 52.Qe4–+ Kc3 (better 52...Ke4 53.g7 e2 54.Kh5 e1Q–+) 53.g7 (53.Kh5 Kb2 54.g7 Kc1 55.g8Q Bb4 56.Qgc4 Kb2 57.Qec2 Ka3 58.Q4b3) 53...Bc1 (53...e2 54.Kh5 e1Q 55.Qe1 Be1+–) 54.g8Q Kd2 (54...e2 55.Kg6 e1N 56.Qgc4 Kb2 57.Qe5 Kb1 58.Qb3 Bb2 59.Qbb2) 55.Qed5 (55.Qa2 Bb2 56.Qb2 Kd1 57.Qeb1) 55...Kc3 56.Qc8 (56.Qc4 Kd2 57.Qg2 e2 58.Qge2) 56...Kb2 57.Qdc5 (57.Qcb7 Ka1 58.Qa5 Ba3 59.Qa3) 57...e2 (57...Bd2 58.Qc2 Ka3 59.Q8c5 Bb4 60.Qe3 Bc3 61.Qec3) 58.Qc1 Kb3 59.Qe3 (59.Q8c4) 59...Kb4 60.Qe2 (60.Qcc5 Ka4 61.Qc4) 60...a4 61.Qb2 Ka5 62.Qa8 1–0. MARYMARY – IGNUS, ChessWorld.net, 2019.

5.c4 Nc6 6.Ne2 Nf6 7.d4 e6 8.0-0 d5 9.Nbc3 dc4 10.Rb1 Bd7 11.Bc4 Qc7 12.Nb5 Qd8 13.Qb3 (13.Ng3 Rc8+=) 13...a4 14.Qd1 Ne4 (14...Be7 15.Nec3+=) 15.Qd3 Nf6 16.Ba3 Na5 17.Bf8 Kf8 18.Qa3 Kg8 19.Bd3 (19.Qa4?! Ne4=) 19...g6 20.Rfc1 Bc6 21.Qa4 Qd5 22.Nf4 Qg5 (22...Qd7 23.Qb4+–) 23.Rc6! bc6 (23...Nc6 24.Qa8) 24.Nc7 Rc8 25.h4! Qh4 26.Qa5 Ng4 27.Nh3 Qd8 28.Rb7 Qd6 29.Nf4 e5 30.Bc4 Kg7 (30...Qf6 31.Nh3 Rf8+–) 31.Bf7! Kh6 (31...Kf7 32.Nb5) 32.Nfe6 Rb8 33.e4 Qe7 (33...Rb7?? 34.Qd2 Ne3 35.Qe3 g5 36.Qg5) 34.Qd2 g5 35.Qe2 Qf7 36.Qg4 Qh5 37.Qh5 Kh5 38.Rb8 Rb8 39.de5 Rb7 40.Ne8 (40.Na6 Ra7 41.Nec5 Kg6+–) 40...Rb1 (40...Ra7 41.N6g7 Kg6 42.Nf5+–) 41.Kh2 Kg6 (41...Rb5 42.Nf8 Kh6 43.Nd6 Re5 44.Nf7 Kg7 45.Ne5 Kf8 46.a4+–) 42.Nd6 Rb2 43.Nd8 (43.Nf8 Kg7 44.Nd7 Rd2+–) 43...Ra2 44.Nc6 Rd2 (44...Ra6 45.e6 Rc6+–) 45.Ne7 Kg7 46.Nd5 (46...Rf2 47.e6+–) 1–0. Thystrup,Preben – Hansen,Bjarne G, corr 3GMM½–09, 1998. Marek's comment: some "sources" give the false information "Carsten Hansen". The right name is of course "Bjarne G Hansen". I was the organizer of 3GMM, so I should know...

5.c4 Nf6 6.Nf3+= Nc6 7.a3 (7.d4 Qc7+=) 7...e5 8.Bb2 (8.Nc3 Be7+=) 8...d6 9.Nc3 Be7 10.h3 (10.0-0 0-0+=) 10...0-0= 11.0-0 Qd8 (11...Na7!?=) 12.d4+= Na7 13.Ba4 e4 14.Nd2 Bd7 (14...Bf5!?+=) 15.Bc2+/– b5 16.cb5 (16.Be4?! Ne4 17.Nde4 bc4=) 16...Nb5 17.Nce4 d5 (better is 17...Re8!?+/–) 18.Nf6+– Bf6 19.Qh5 g6 20.Qd5 Be6 21.Qf3 (21.Qd8 Rfd8 22.Rac1 Rab8+–) 21...Bg7 22.Qe2 (22.Rfc1 Rb8+–) 22...Qg5 (22...Rb8 23.Rfb1+–) 23.Kh1 (23.Ne4 Qd8+–) 23...Rac8 24.Ne4 Qe7 25.Nc5 (25.Rfc1 Nd6+–) 25...Bd5 (25...Nd4 26.ed4 Rc5 27.Bg6 Rd5+–) 26.Rad1?? (better is 26.Qb5 Rb8 27.Qa5 Rb2 28.Qc3+–) 26...Nd4+/– 27.Bd4 (27.Rd4?! Qc5 28.Be4 Bd4 29.Bd4 Qd6 30.Bd5 Qd5+=) 27...Bd4 28.Rd4 Qc5 29.Bd3 Bb3 30.Qb2 a4 31.Rb4 Rfd8 (31...Rb8 32.Rc1 Qe7 33.Rd4+/–) 32.Bb5 Rd1 (32...Ra8!?+/–) 33.Rd1+– Bd1 34.Ba4 Ba4 35.Ra4 Qc1 (35...h6 36.Qf6+–) 36.Qc1 Rc1 37.Kh2 Rc2 (37...Kg7 38.Kg3+–) 38.f3 (38.Kg3 h5+–) 38...Kg7 39.e4 Kf6 40.h4 g5 (40...h5 41.Ra8+–) 41.hg5 Kg5 42.Kg3 f6 (42...Kf6 43.Ra6 Ke7 44.a4+–) 43.Ra5 Kg6 44.a4 h5 45.Rd5 h4 46.Kh3 (46.Kh4 Rg2 47.a5 Kf7+–) 46...Ra2 (46...Kf7 47.a5+–) 47.a5 Kf7 48.Rh5 1–0. zabazaba – anibal22, gameknot.com, 2015.

5.Bc4 Qf6 6.Nc3 Qg5 7.Qf3 Nc6?? (better is 7...e6+=) 8.Nge2 (better is 8.Qf7 Kd8 9.Qf8 Kc7 10.Nd5 Kd6 11.Ba3 Nb4 12.Nf3+–) 8...Ne5–+ 9.Qd5 e6 (9...Nf6!? 10.Qb5 Qg2 11.Ng3–+) 10.Qb5–/+ Qg2 11.Rg1?? (better is 11.Ng3 Nf3 12.Ke2–/+) 11...Nf3–+ 12.Kd1 Qf2 (better is 12...Ng1 13.Ng1 Qg1 14.Ke2 Qh2–+) 13.Rh1 Qg2 (13...Nh2?! 14.Qh5 Nf3 15.Ne4–/+) 14.Ng3 Bd6 (better is 14...Nh2!? 15.Nce2 Nf3 16.Qh5–+) 15.Nce4 f5?? (better is 15...Bg3 16.Ng3 Nh2–+) 16.Nd6+– Ke7 17.Ba3 (better is 17.Qc5 Kd8 18.Nf7 Ke8 19.Nh8+–) 17...Qd2 0–1. varin123 – wk1234, playok.com, 2012.

5.Qe2 Qg6 6.d4 Qg2 7.Qf3 Qf3 8.Nf3 Nf6 9.Nbd2 Nc6 10.a3 e6 11.Bb2 Be7 12.Rg1 0-0 13.Nc4 d5 14.Nb6 Rb8 15.Ne5 Ne5 16.de5 Ne8 17.Ke2 Bc5 (17...Nc7 18.Bd3+=) 18.Nc8 (better is 18.Bd4!? Be7 19.h3+=) 18...Rc8+= 19.Rg4 Nc7 20.Bd3 g6 21.h4 Ne8 22.h5 Ng7 23.Rh1 a4 (23...Ba7!?+=) 24.hg6 fg6 25.Rgh4 Nh5 26.Ra4 Rc7 27.Ra5 b6 28.Ra6 Rcf7 29.Rh2 Ng7 30.Bc3 Nf5 31.Bb4 Ng7 32.Bc5 bc5 33.c4 d4 (33...Rb7 34.Ra5 Rb2 35.Ke1=) 34.Rc6 (34.ed4!? cd4 35.Be4+/–) 34...Ra7 35.Rc5 de3 0–1. ferminkatcho (1715) – orezavatko (1830), kurnik, 2012.

5.Be2 Nc6 6.Nf3 Nf6 7.Nc3 e5 8.0-0 d5 9.d3 Bb4 10.Bd2 0-0 11.Rb1 Qc5 12.Na4 Qe7 13.Bb4 (13.Nb6 Ra7=) 13...Nb4 (13...ab4!? 14.c4 dc4 15.dc4 Rd8+=) 14.Nb6 Na2?? (better is 14...Ra7 15.c3 Nc6= (worse is 15...Na2 16.Qb3+–)) 15.Na8+– Nc3 Black prepares e4 16.Qd2 Nb1? (better is 16...Ne2!? 17.Qe2 Bg4+–) 17.Rb1 Bd7 (17...a4 18.Qa5+–) 18.Nb6 Bc6 (18...Bg4 19.Qa5 e4 20.Nd4 Be2 21.Ne2+–) 19.Qa5 e4 20.Nd4 ed3 21.Bd3 Qe5 22.Nc6 (22.Qc5!? Rd8+–) 22...bc6 23.Qd2 (23.Qc5 Qe6+–) 23...Ng4 24.g3 c5 (24...Qh5 25.h4 Ne5 26.Qe2+–) 25.Be2 (better is 25.Nd5!? Nf6 26.Nf6 Qf6+–) 25...Nf6 26.Rd1 d4 27.ed4 cd4 28.Qd4 (better is 28.Nc4 Qf5 29.Nd6+–) 28...Qe2+/– 29.c4 h5 30.c5 Ng4 31.c6?? (better is 31.Rd2 Qe6 32.Kg2+/–) 31...Ne5?? (better is 31...Nf2 32.Qf2 Qd1 33.Kg2 Qc1–+) 32.c7?? (better is 32.Qd5 Nc6 33.Nd7=) 32...Nf3–+ 33.Kg2 Nd4 34.Rd4 Qc2 (better is 34...Qe5 35.Rc4 Kh7–+) 35.Rc4 Qc4! 36.Nc4 Rc8 37.Ne5 Rc7 38.h4 f6 39.Ng6 Kf7 40.Nf4 Rc5 41.Nd3 Ra5 42.Nf4 g6 43.f3 Rf5 44.Nd3 g5 45.hg5 fg5 46.Nf2 Re5 47.g4 h4 48.Kh3 Ke6 49.Ne4 (49.Kg2 Re2 50.Kg1 Rf2 51.Kf2–+) 49...Re4! 50.fe4 Ke5 51.Kg2 Ke4 52.Kh3 Kf3 53.Kh2 Kg4 54.Kg2 If White now would get h3+ in, he might survive 54...h3 55.Kh2 Kh4 56.Kh1 g4 57.Kh2 g3 58.Kh1 h2 (58...Kg4 59.Kg1 Kf3 60.Kf1 h2 61.Ke1 Ke3 62.Kd1 Kd3 63.Kc1 h1Q 64.Kb2 Qb7 65.Kc1 g2 66.Kd1 g1Q#) 59.Kg2 h1Q! 60.Kh1 Kh3 61.Kg1 g2 62.Kf2 Kh2 63.Ke1 g1Q 64.Ke2 Qg3 65.Kf1 (65.Kd2 Qf3 66.Kc2 Kg3–+) 65...Qb3 (65...Qg2 66.Ke1 Kg3 67.Kd1 Kf3 68.Kc1 Ke3 69.Kb1 Kd4 70.Kc1 Kc3 71.Kd1 Qd2#) 66.Ke2 Kg3 67.Kd2 Kf3 68.Ke1 (68.Kc1 Ke4 69.Kd2 Qb2 70.Ke1 Ke3 71.Kd1 Qd2#) 68...Qc2 69.Kf1 Qf2# (69...Qd1#) 0–1. blaugrana18 – maccaco (1740), kurnik, 2012.

5.a4 Qb6 6.Bb2 d5 7.Nc3 Bf5? (better is 7...Nf6!?+=) 8.Nd5+– Kd8?? (8...Qd8 9.Qf3 Nh6+– (9...Bc2?? 10.Nb4 f6 11.Nc6 bc6 12.Bc6 Kf7 13.Ba8+–)) 9.Nb6 Rb8 10.Nf3 (10.Qf3 Nh6 11.Qd5 Kc7 12.Bc6 f6 13.Qa5 bc6 14.Na8 Kd6 15.Qc7 Ke6 16.Qb8 Kf7+–) 10...Nb4 11.c3 (better is 11.Be5 Nc2 12.Ke2 Rc8 13.Nc8 f6+–) 11...Nc2 12.Kf1 Na1 13.Qa1 Bd3 (13...Kc7 14.c4 Bd3 15.Ke1+–) 14.Bd3 1–0. aniabielak – virginjo, kurnik, 2012.

5.a4 g6 6.Bb2 Nf6 7.Nc3 Bg7 8.Ne4 0-0 9.Ng5 (9.Nf6!? ef6 10.Ne2+=) 9...e5 10.f4 ef4 11.ef4 Qe7 12.Ne2 Re8 13.0-0 h6 14.Nf3 d6 15.Ra3 Qc7 16.Bc6 bc6 17.d3 Bf5 18.Ned4 Bd7 19.c4 Rab8 20.Bc3 d5 21.c5 Ng4 22.Qa1? (better is 22.Qd2!? Qa7 23.Nb3 Bc3 24.Qc3=) 22...Qf4–/+ 23.Bd2 (23.Nc2 Bc3 24.Rc3 Re2–/+) 23...Qc7 24.h3 Nf6 25.Qc1 Kh7?? (better is 25...g5–/+) 26.Bf4+= Qb7 27.Bb8 Qb8 28.Rb3 Qg3 29.Ne2?? (29.Rf2 Bh3 30.Ne2 Re2 31.Re2 Bg2 32.Ng5 Qg5 33.Qg5 hg5 34.Kg2 Nd7+=) 29...Qc7 (29...Re2 30.Qh6 Bh6 31.Nh4 Be3 32.Kh1 Bf4 33.Rf4 Re1 34.Rf1 Rf1) 30.Nf4?? (30.Qd2 Bc8 31.Rf2 Nd7+=) 30...Be6?? (better is 30...g5–+) 31.Ne6+/– Re6 32.d4 Re4 33.Rd3 Nh5 34.Ne5 (better is 34.Qd1!?+=) 34...f6 35.Nf3 1–0. arti000 – malutki12, kurnik, 2012.

5.Bb2 b6 6.Nf3 Bb7 7.0-0 e6 8.c4 d6 9.d4 Qc7 10.d5 0-0-0 11.dc6 Nf6 12.cb7 Kb8 13.Bf6 Qc8 14.bc8Q Ka7 15.Qc7 Ka8 16.Qc6 Ka7 17.Bd8 Be7 18.Qb6 Ka8 19.Bc6# 1–0. Machete99 – guest80, ICC, 2002.

5.Bb2 d5 6.Nf3 Bd7 7.0-0 Nf6 8.a4 e6 9.Na3 Be7 10.c4 0-0 11.Qb3 dc4 12.Nc4 Nd5 13.Rac1 Ndb4 14.Ba1 Bf6 (14...Nb8 15.Bd7 Nd7 16.Bd4=) 15.d4 h6 16.Nfd2 Qe7 (16...Be7 17.Ne4+=) 17.Ne4 Rfc8? (better 17...Nd5+–) 18.Nb6 Nd5 19.Nf6 Qf6? (19...Nf6 20.Rfd1 Rab8 21.Nc8 Rc8+–) 20.Nd7 (20.Nd7 Qe7 21.Nc5+–) 1–0. FeegLood (2520) – toar4 (2195), lichess.org, 2015.

5.Bb2 d5 6.Nf3 e6 7.Nc3 Bd7 8.a3 Nf6 9.0-0 Bd6 10.Be2 0-0 11.Nb5 Bb8 12.Rb1 Ne4 13.c4 Ne7 14.d3 Bb5 15.cb5 Nd6 16.Qa4 f6 17.Rfc1 Ndf5 (17...Qd7 18.Bc3+=) 18.Rc2+/– Qd6 19.Rbc1 g5 (19...Ng6 20.g3+/–) 20.Qg4 Ng6 21.g3 Ba7 22.d4 Bb6 23.Bd3 Nfe7 24.h3 Kg7 25.a4 (25.h4 gh4 26.gh4 Kf7+/–) 25...Rh8 26.Nd2 h5 27.Qf3 h4 28.g4 Rhc8 29.Bc3 Bc7 30.Nb3 Qh2 31.Kf1 e5 (31...Bd6 32.Ba5 Rc2 33.Bc2+/–) 32.e4 (32.Nc5 e4 33.Ne6 Kf7 34.Ng5 Ke8 35.Ne4 de4 36.Be4 Ra7+–) 32...Nf4 (32...Bb6 33.ed5 Rc3 34.Rc3 ed4 35.Nd4 Bd4 36.Rc7+/–) 33.Bd2 Nh3?? (better is 33...Bb6 34.Bf4 Qf4 35.Qf4 gf4 36.de5 Rc2 37.Rc2 fe5 38.ed5 Nd5+–) 34.Rc7+– Rc7 35.Rc7 Kf7 (35...Re8 36.Qg2 Qg2 37.Kg2 Nf4 38.Bf4 de4 39.Be4 gf4 40.de5 fe5 41.Na5+–) 36.de5 (36.Ba5?! Qg1 37.Ke2 Nf4 38.Kd2 h3 39.ed5 h2+–; < 36.ed5 e4 37.Re7 Ke7 38.Be4 Kf7+–) 36...f5 (36...Qe5 37.Rb7 Nf4 38.Bf4 gf4 39.ed5 Rb8+–) 37.Qf5 Ke8 38.Qd7 (38…Kf8 39.Qe7 Kg8 40.Qg7#) 1–0. marekt (2070) – benhawkes (1830), ICC, 2003.

5.Bb2 Qb6 6.c4 (6.a4 Nf6+=) 6...Na7 (6...Nb4!?=) 7.Nc3+/– Nb5 8.Nb5 d6 9.Nf3 e5 10.Qc2 (10.d4 f6+/–) 10...Nf6 11.d4 e4 12.Nd2 Bf5 (12...d5 13.a4 Bd7 14.Qb3+=) 13.Rb1+/– Be7 (13...Rc8 14.Ba3 Qa6 15.f3+/–) 14.a4 (better is 14.d5!? Bg6 15.Bd4+–) 14...0-0 15.0-0 (15.d5 Qd8+=) 15...Rfc8 16.Ba3 Qc6 17.Rfc1 Bf8 (17...Nd5 18.Qb2 (worse is 18.Ne4 Ne3 19.Qe2 Qe4 20.fe3 Qe6+=) 18...Nf6 19.h3+=) 18.Nb3 (18.Nc3 Rc7+/–) 18...Qd7 19.Qd2 b6 (19...h6 20.h3+= (worse is 20.Na5 b6 21.Nb3 Ra4+=)) 20.d5+/– Rd8 (20...Ng4 21.N3d4+/–) 21.N3d4 Ng4 (21...Bg4 22.Nc6 Re8 23.Bb2+–) 22.Nc6 Ne5 (22...Re8 23.Nbd4 Ra6 24.Qe2+/–) 23.Nbd4+– Nd3 (23...Rdb8 24.Nb8 Rb8 25.Rb5+–) 24.Nd8 (24.Rb6?! Nc1 25.Qc1 Rdc8+/–; 24.Nf5?! Nc1 25.Nd8 Nd3+/–) 24...Nc1 25.Qc1 (25.Rc1?! Rd8 26.Bb2 Re8+/–; worse is 25.Bc1 Rd8 26.Rb6 Ra8+–) 25...Rd8 26.Nc6 (26.Rb6 Qa7 27.Qb2 Bd7+–) 26...Rc8 27.Rb6 Qc7 (27...h5 28.Ra6+–) 28.Qb2 (28.Ra6 f6+–) 28...Bd7?? (28...Ra8+–) 29.Rb7 (29.Rb7 Bc6 30.Rc7 (30.dc6?! Qc6 31.Qb5 Qc4=) 30...Rc7 31.dc6 Rc6 32.Qd4+–) 1–0. Nikolic,Jovane – Nolasco,Vitor (1905), 3o. Campinas Open LCX, 2009.

5.Bb2 e6 6.Nf3 Nf6 7.0-0 d5 8.c4 (8.Ne5 Qc7=) 8...Bd6 (8...dc4 9.Na3=) 9.Nc3 (9.cd5 ed5 10.Bf6 Qf6+=) 9...0-0 10.Rc1 Na7 (10...dc4 11.Bc4 e5 12.d4=) 11.Qe2 b6 12.a4 Bb7 13.cd5 Nd5 14.Bc4 Nc3 15.Rc3 Nc6 (15...Bc6 16.Ra1=) 16.Rfc1 h6 17.h3 Nb4 18.e4 Rc8 19.Qe3 (19.Bb5 Rc3 20.Rc3 Na2+=) 19...Rc5 (19...e5 20.d4 ed4 21.Qd4=) 20.d4+= Rc7 21.Ne5 Qh4 22.f4 Rfc8 23.f5 Rc4 (23...Be5!? 24.de5 Qe4 (24...Be4 25.fe6 Kf8 26.g3 Qh3 27.Qe4 Rc4 28.Rc4 Qg3 29.Qg2 Qg2 30.Kg2 Rc4 31.Rc4+-) 25.Qe4 Be4 26.fe6 Bd5 27.Bd5 Nd5 28.Rc7 Rc7 29.Rc7 Nc7+-) 24.Rc4+/- Rc4 25.Nc4 Bf4 26.Qe1 Qe7 ½-½. cramneck (2230) - marekt (2200), gameknot.com, 2021.

5.Bb2 e6 6.f4 Nf6 7.Nf3 Be7 8.0-0 0-0 9.a4 b6 10.Nc3 Bb7 11.Ne5 Qc7 12.d4 (12.Ng4 Rac8=) 12...Rac8 13.Rc1 Nb4 14.h3 d6 15.Nd3 Nbd5 16.Nd5 Nd5 17.Qd2 Nc3 18.Bc3 Qc3 19.Qe2 Bc6 20.Rb1 Bb5 21.Rb5 Qc2 22.Qc2 Rc2 23.Rb6 Re2 24.Re1 (24.Rf3 Ra2 25.Rb7 Bf6=) 24...Rd2 (24...Ra2 25.Nb2=+) 25.Nf2 (25.Nc1 d5=) 25...Bh4 (25...d5 26.Ra1=+) 26.Rf1 f5 27.Nd1 Rc8 28.Rb2 Rcc2 29.Rc2 Rc2 30.Kh2 Kf7 0-1. dbtsafi1 (2040) - marekt (2205), gameknot.com, 2021.

5.Bb2 Nf6 6.Nc3 e6 7.Nf3 Be7 8.a4 0-0 9.0-0 b6 10.Ne2 Bb7 11.Ba3 Nb4 12.c3 (12.Ned4 Rc8=) 12...Nbd5 (12...Bf3 13.gf3 Nbd5 14.Be7 Qe7 15.Rb1=) 13.Qb3 Rc8 (13...Ba3 14.Ra3 Nc7 15.Ng5=+) 14.Rab1 (14.d3 Nc7=) 14...Ne4 (14...Ba3 15.Qa3 Nc7 16.Bd3=+) 15.Be7 Qe7 16.c4 (16.Bc4 Nc5 17.Qc2 Nc7 18.Rb6 Be4=) 16...Nb4 17.d3? (better 17.Ng3!?=) 17...Nc5–/+ 18.Qa3 (better 18.Qc3 Nbd3 19.Ne1–/+) 18...d5?? (better 18...Bf3 19.gf3 Nbd3–+) 19.d4= Ne4 20.cd5 Bd5 21.Nf4 Bb7 22.Ne5 (22.Rfc1 Nd6 23.Ne5 Be4 24.Rc8 Rc8=) 22...Rc3 (22...Nd2!?–/+) 23.Qa1= Rfc8 24.Rbc1 h6 (24...Nc2 25.Qb2 Qb4 26.Qb4 ab4 27.Nd7=) 25.Nc4 Rc1 26.Rc1 (26.Qc1? Nd6 27.Qb1 Nc4–+ (27...Rc4?! 28.Bc4 Nc4 29.Rc1–+)) 26...Qc7 27.Ne2 (27.f3 Nd6 28.Ne2 Nb5 29.ab5 Qd7=) 27...Qd8 (27...Nd3!? 28.Rf1 Nef2 29.Rf2 Nf2 30.Kf2 Qh2=+) 28.Ne5 Bd5 29.f3 Nd2 (29...Rc1 30.Qc1 Nd6 31.e4=) 30.Rc8 Qc8 31.Qc3 Qc3 32.Nc3 f6 33.Nd7 (worse 33.Nd5 Nd5 34.Bd7 Nc7+=) 33...Nc4 34.e4 (34.Nd5?! ed5 35.e4 Kf7+–) 34...Nd6? (better 34...Bc6 35.Nf6! Kf7 36.Bc4 Kf6+–) 35.ed5 (35.Nd5?! ed5 36.Nb6 de4+=) 35...ed5 36.Kf2 Kf7 37.Nb6 Ke6 (37...Nc2 38.Nbd5 Nd4 39.f4+–) 38.Ke3 (better 38.Bd7 Ke7 39.Bh3 f5 40.Nbd5 Kd8+–) 38...Nf5 39.Kd2 Nd4 (39...Kd6 40.Ne2+–) 40.f4 (better 40.Ncd5!? Nb3 41.Kc3 Nd5 42.Nd5 Kd5 43.Bc4 Kc5 44.Bb3 Kc6+–) 40...Nb3 41.Ke3 (41.Kd1 Nd4+–) 41...f5 (41...d4!? 42.Ke2 dc3 43.Bc4 Kf5 44.Bb3 Kf4+–) 42.Bd7+– Kd6 43.Bf5?? (better 43.Nb5 Kc5 44.Nc8+–) 43...Nc2?? (43...d4 44.Ke2 dc3 45.Nc4 Kc5–+) 44.Bc2+– (44.Bc2 d4 45.Kd3+–) 1–0. FeegLood (2560) – penguingim1 (2495), lichess.org, 2017.

5.Bb2 Nf6 6.Nf3 g6 7.Bf6 ef6 8.c4 Bg7 9.Nc3 0-0 10.0-0 Ne5 (10...d6 11.d4+–) 11.Ne1 d6 12.d4 Nd7 13.Rb1 f5 14.Nd5 Nf6 15.Nf6 Bf6 16.Ba4 (16.Nd3 Be6+–) 16...d5 (16...Qc7 17.Rc1+=) 17.c5+– f4 18.ef4 Qc7 19.g3 (19.Qd2 Ra6+–) 19...Bf5 20.Rb6 Bg7 21.Nf3 Rfe8? (better 21...Bg4+–) 22.Be8+– Re8 23.Ne5 (23.Qa4 Qc8+–) 23...f6 24.Qa4 Rd8 (24...Re7 25.Nf3 Be4 26.Nd2+–) 25.Nf3 Be4 26.Nd2 Bd3 27.Re1 h5 28.Re8 Re8 29.Qe8 Kh7 30.Qe6 h4 31.Qd5 Qc8 (31...Qe7 32.Qe6 Qe6 33.Re6+–) 32.Qf3 (32.Rb7!? Qe8 33.Qf7 Qf7 34.Rf7 a4+–) 32...Qf5 (32...Ba6 33.f5 (worse 33.gh4 Qe8 34.Ra6 ba6+–) 33...gf5 34.Qh5 Kg8 35.Qh4+–) 33.g4 (33.g4 Qd7 34.Rd6+– (34.Qd3?! Qg4 35.Kh1 Qd1 36.Qf1 Qd2+–)) 1–0. FeegLood (2670) – Blitzstream_twitch (2600), lichess.org, 2015.

5.Nc3 d5 6.a3 Bd7 (6...Nf6 7.Nf3=) 7.Nf3 (7.Nd5!? e5 8.e4+–) 7...e6 8.Rb1 Nf6 9.Bb2 Be7 10.g4 (10.0-0!?=) 10...0-0=+ 11.g5 Ne4 12.h4 Nc3 13.Bc3 f6 (better 13...Ba3!? 14.h5 Bd6–/+) 14.Rg1 e5 (14...Rc8 15.Bc6 Bc6 16.Nd4+=) 15.Bc6 bc6 (15...Bc6 16.gf6 Bf6 17.Ne5=) 16.gf6+= Bf6 17.Ne5 (worse 17.Be5 Be5 18.Ne5 Qh4=) 17...Be5 (17...Be8 18.Rb7 Qc8 19.Qb1+–) 18.Be5+– g6 (18...Rf7 19.Qh5+–) 19.Qh5 Qe8 20.Rg5 (better 20.f4 Bf5 21.Qh6+–) 20...Qe5?? (better 20...Bf5 21.f4 Bc2+–) 21.Re5 (better 21.Rg6 hg6 22.Qe5+–) 21...gh5–/+ 22.Rb7 Rf7 23.Rg5 Kh8 24.Rh5 Raf8 25.Rh6 (better 25.Re5–/+) 25...Bf5?? (better 25...Rg8 26.f3 Kg7–/+) 26.Rf7+= Rf7 27.Rc6 Be4 (27...a4 28.Rc5 Be6 29.Ra5+=) 28.Rc5 Kg7 (28...Bf3 29.d3 Ra7 30.Kd2+=) 29.d3+– Kf6?? (better 29...Bf3+–) 30.de4+– d4 (30...de4 31.Ra5 Rb7+–) 31.Ra5 (31.Rf5 Ke6 32.Rf7 de3 33.Rh7 ef2 34.Kf2 Ke5+–) 31...d3 (31...Rd7 32.Rd5 Ra7 33.ed4 Ra3 34.Rf5 Kg7 35.Kd2+–) 32.cd3 (better 32.Rf5 Ke6 33.Rf7 Kf7 34.cd3 Kg6+–) 32...Kg6 33.Rf5! Rd7 (33...Rf5 34.ef5 Passed pawn) 34.Ke2 Rc7 (34...Ra7 35.h5 Kg7 36.e5 Ra3 37.d4+–) 35.Kf3 (35.a4 Rc2 36.Kf3 Kg7+–) 35...Rc2 (35...Ra7 36.h5 Kg7 37.d4+–) 36.d4 (36.h5 Kg7 37.a4 h6+–) 36...Rc3 (36...Rc4 37.h5 Kh6 38.e5+–) 37.Kf4 (37.a4 Rc6+–) 37...Kh6 (37...Ra3 38.d5+–) 38.f3 (38.a4 Rc6+–) 38...Rc2 (38...Ra3 39.e5+–) 39.Rf6 (39.e5 Rc8+–) 39...Kh5 (39...Kg7 40.Rb6 Rh2+–) 40.Rf5 (40.e5!? Rb2+–) 40...Kh4?? (40...Kh6 41.a4 Kg7+–) 41.Rf7 h5 (41...h6 42.e5 Kh5 43.e6+–) 42.Rf5 (better 42.e5 Rc6+–) 42...Rg2 (42...Rc3 43.e5 Ra3 44.e6+–) 43.d5 1–0. FeegLood (2820) – singapu85 (2655), time forfeit, lichess.org, 2017.

5.Nf3 b6 6.Bb2 Ba6 7.Ba6 Ra6 8.Qe2 Ra8 9.e4 e5 (9...e6!?+–) 10.Ne5+– Ne5 11.Be5 Nf6 (11...Ne7 12.0-0+–) 12.c4 Qe7 13.d4 d6 (13...Qe6 14.0-0 Rc8 15.Nd2+–) 14.Bf6 Qf6 15.Qb2 Qe6 (15...Rb8 16.Qb5 Kd8 17.Qb2+–) 16.Nd2 Rb8 17.Qb5 Kd8 (17...Qd7 18.Rb1+–) 18.0-0 Be7 19.Rab1 Kc7 20.c5! dc5 (20...bc5 21.Qa5 Deflection; 20...dc5 21.dc5 Combination) 21.dc5 (21.d5 Qd7 22.Qa6 Rhe8+–) 21...Bc5 22.Nb3 Qc6 23.Qd3 Rhd8 (23...Rhe8 24.Rfc1 Qd6 25.Qc4+–) 24.Qg3 Qd6 25.Qg7 Qg6 (25...Bb4 26.Qf7 Rd7 27.Qh5+–) 26.Qc3 Qg5 27.h4! Qe7 (27...Qh4 28.Nc5 Deflection) 28.Rfc1 a4?? (28...Kd7+–) 29.Nc5 bc5 30.Qa5 (30.Qc5?! Qc5 31.Rc5 Kd6+–) 30...Kd7 31.Rb8 Rb8 32.Qa7 (32.Qa7 Ke8 33.Qb8 Qd8 34.Qf4+–) 1–0. Taulien,Hans_Juergen (2350) – Bekemann,Uwe (2190), Demoturnier remoteschach.de, 2002.

5.Nf3 b6 6.Bb2 Bb7 7.0-0 Nf6 8.d3 e6 9.Nbd2 Bd6 (9...Na7 10.c4=) 10.Nc4 Bc7 11.Nfe5 (11.Rb1 Na7+=) 11...0-0 12.f4 Na7 13.a4 Nb5 14.ab5 d6 15.Ng4 Ne8 16.Qe1 Qd7 17.Qg3 (17.Na3=) 17...Kh8 (better 17...f5!? 18.Nh6 Kh8-/+) 18.Rab1 (18.Bd4 Qb5 19.Rfb1 Qc6 20.Nb6 Rb8+=) 18...f6 19.e4 (19.Bd4!? Qd8 20.e4=) 19...d5=+ 20.Nd2 Nd6 (20...Qb5? 21.Ba3 Qc6 22.Bf8+-) 21.Qh4? (better 21.e5!? fe5 22.Ne5 Qb5 23.Nc6=+) 21...de4-+ 22.Nf6 gf6 23.Bf6 Kg8 24.Qg4 Kf7 25.de4 (25.Be5 e3 26.Nf3-+) 25...Kf6 26.e5 Kf7 (26...Ke7 27.Qg5 Ke8 28.ed6 Qd6 29.Rbe1-+) 27.ed6 Qd6 28.Nf3 Qc5 29.Kh1 Bf3 30.Rf3 (30.Qf3 Qc4-+ (30...Qc2 31.Rbc1 Qf5 32.Rc7 Kg8 33.Qc6+/-)) 30...Qf5 (30...Qc2 31.Rff1 Qf5 32.Qe2-+) 31.Qh4 Rfd8 (31...Qc2 32.Re1 Rg8 33.g4-+) 32.g4 (32.Re1 Rd2 (32...Qc2 33.f5 Kg8 34.Qg5 Kh8 35.Qf6 Kg8 36.Qe6 Kh8 37.Qf6 Kg8 38.Rc3+=) 33.Rc3 Bd6-+ (33...Rc2?! 34.Rc2 Qc2 35.f5 Qf5 36.Qc4-+; 33...Bf4?! 34.Rf3 e5 35.g3-/+)) 32...Qc2 33.Qh5 Kg8 (33...Qg6 34.Rc1 Rd7 35.Qh3-+) 34.Qg5 (34.Re1 a4-+) 34...Qg6 35.Qh4 (35.Qg6 hg6 36.Rc1-+) 35...Qb1 36.Kg2 Rd2 37.Rf2 Rf2 (better 37...Qe4 38.Kh3 Rd3 39.Qg3-+) 38.Qf2 Rd8 (38...Rd8 39.Kh3 Qg6-+) 0-1. pacal56 (2240) - nutzy35 (2225), Rated Blitz game, lichess.org, 2015.

5.Nf3 e5 6.Nc3 +=.

6.0-0 d6 7.d4 g6? (better is 7...d5+=) 8.d5+– Bg7 9.dc6 0-0 10.Bb2 Qb6 11.a4 (better is 11.cb7!? Bb7 12.c4+–) 11...bc6 12.Bd4 c5 13.Bb2 Bg4 14.h3 Bh5? (14...Be6+–) 15.g4 Ng4 16.Bg7 Kg7 17.hg4 Bg4 18.Qd5 e5 19.Nbd2 Rad8 20.Rab1 Be6 21.Qc6 Qb8 22.Bc4 d5 (22...Qc8 23.Qc8 Bc8+–) 23.Rb8 Rb8 24.Bd5 (24.Bd5 Rbc8 25.Qd6 Bd5 26.Qe5 f6 27.Qd5+–) 1–0. kaasparov – brchess, kurnik, 2012.

6.0-0 d6 7.Nd4 Bd7 8.Nf3 e5 9.a4 Be7 10.Bb2 0-0 11.c4 e4 12.Nd4 Nd4 13.Bd4 Bg4 14.Qc2 Rc8 (14...Be2!? 15.Rc1 Rc8=) 15.Nc3+= d5 16.Bf6 (better is 16.cd5!? Bf5 17.f3+/–) 16...Bf6+= 17.Nd5?? (17.cd5 Bc3 18.dc3 Qd5+=) 17...Ba1?? (better is 17...Qd5 18.cd5 Rc2 19.Rac1 Rd2 20.h3–+) 18.Ra1?? (18.Qe4 Be6 19.Ra1 Bd5 20.Qd5 Qd5 21.cd5 Rfd8=) 18...Be6 (better is 18...Qd5! 19.Rc1 Qe5–+) 19.Qe4= Bd5 20.cd5 Qf6 21.d4 h6 22.Rb1 Qd6 23.g3 Rc7 24.Qf4 Qf4 25.gf4 Rcc8 26.Kg2 Rcd8 27.Bc4 Kh7? 28.Rb7+– Rb8 29.Ra7 Rfc8 30.Bb5 Ra8 31.Rf7 Kg6 32.Re7 Kf6 33.Re6 Kf5 34.Re5 Kg6 35.Bc6 Ra7 36.h4 Rcc7 37.h5 Kh7 38.Be8 Re7 39.Bg6 Kh8 40.Rf5 Ra8 41.Kf3 Rb7 42.d6 Rd7 43.Rd5 Kg8 44.e4 Kf8 45.e5 Rb7 46.f5 Rb3 47.Ke4 Rb2 48.f3 Rb4 49.e6 Ra4 50.e7 Kg8 51.e8Q Re8+– 52.Be8 Kf8 53.Ba4 Kf7 54.d7 g6 55.d8Q gf5 56.Rf5 Kg7 57.Qe7 Kg8 58.Rf8# 1–0. lican – ma51d, kurnik, 2012.

6.0-0 e6 7.d4 Be7 8.a4 0-0 9.Ba3 d6 10.c4 Na7 11.Nc3 Nb5 12.Nb5 Ne4 13.Rc1 White plans c5 13...f5 14.Nd2 Nf6 15.c5 dc5 16.Bc5 b6 17.Be7 Qe7 18.Rc6 Rb8 19.Nc4 Bd7 20.Rb6 Rb6 21.Nb6 Bb5 22.ab5 The passed pawn on a5 will become decisive later 22...Qb7 23.Nc4 Qb5 24.Ne5 a4 25.Qa1 Ra8 26.Rb1 Qd5 (26...Qe8 27.Rb7=) 27.Qa3 (27.Qa4! Ng4 28.Qc4+/-) 27...Qe4 Threatening mate... how? 28.Rb4 Exerts pressure on the isolated pawn (better 28.Rc1!? Ng4 29.Nd7+=) 28...Qc2=+ The mate threat is Qd1 29.h3 Ne4 30.Rb2 Qc3?? (30...Qd1 31.Kh2 Nd2 32.Qd6 Nf1 33.Kg1 Ne3 34.Kh2 Nf1 35.Kg1 Nd2 36.Kh2 Nf1 37.Kg1 Ng3 38.Kh2 Nf1=) 31.Ra2?? (better 31.Qe7 Qc8 32.Rb7+-) 31...Qe1 32.Kh2 Nf2 33.Rf2?? (33.Ra1 Qe2 34.Qe7+-) 33...Qf2-+ 34.Qe7 Threatening mate: Qxe6 34...h6?? (better 34...Qa2-+) 35.Qe6= Kh8 36.Ng6 Kh7 37.Nf4 a3?? (better 37...Qc2 38.Qg6 Kh8=) 38.Qf5+- Kg8?? (better 38...Kh8 39.Ng6 Kh7 40.Qf2 a2+-) 39.Qd5 Kh7 40.Qa8 (better 40.Qe4 Kg8 41.Qa8 Kh7 42.Qa3+-) 40...Qe3 41.g3?? (better 41.Nh5+-) 41...Qf2 42.Ng2 a2 43.d5?? (better 43.Qe4 Kh8 44.Qe8 Kh7 45.Qe4 Kh8 46.Qa8 Kh7 47.Qe4=) 43...Qb2-+ 44.d6 a1Q 45.Qe4 Kg8 (better 45...g6-+) 46.d7?? (46.d7 Qd4 47.d8Q Qd8 48.Qc4 Kh8 49.Qe4-+; 46.Qe8 Kh7 47.Qe4 g6 48.d7-+) 1-0. zembelek (2055) - 1999slaba14 (2220), Rated Blitz game, lichess.org, 2014.

6.0-0 e6 7.d4 Be7 8.c4 d5 9.cd5 (9.Ne5 Bd7+=) 9...ed5 10.Ne5 Bd7 11.Nd7 Qd7 12.Qa4 0-0 13.Nd2 (13.Ba3 Rfc8=) 13...Qe6 14.a3 Rfc8 15.Bb2 ½–½. Gutsche,Armin – Nuffer,Juergen, Gross Gerau op, 1996.

6.Ba3 Na7 A) 7.Bd3 A1) 7...g6 8.Be2 (8.0-0 Bg7 9.Nc3 0-0 10.Rb1 d5 11.Be2 Qc7 12.Na4 Bg4 13.Nb6=; 8.Nc3 Bg7 9.Rb1 d6 10.Bb2 0-0 11.0-0 Nc6 12.Qe2 d5 13.e4=; 8.Bb2 Bg7 9.0-0 0-0 10.Nc3 d5 11.Rb1 Nc6 12.a4 e5 13.e4=) 8...Bg7 9.0-0 0-0 10.c4 Nc6 11.d4 d6 12.Nc3 Bf5 13.Nh4+=; A2) 7...Nc6 8.0-0 (8.Nc3 d5 9.0-0 e5 10.Bf8 Rf8 11.Bb5 Bg4 12.h3 Bf3 13.Qf3+=; 8.Bb2 e6 9.Bb5 Bc5 10.0-0 0-0 11.d4 Be7 12.c4 Na7 13.Ba4=; 8.Be2 d5 9.0-0 Bg4 10.Nc3 e5 11.Bf8 Rf8 12.Rb1 Qe7 13.Rb5+=) 8...d5 9.Bb5 Bg4 10.h3 Bd7 11.Nc3 Qc7 12.Be2 Bf5 13.Rb1+=; A3) 7...d6 8.c4 (8.0-0 b5 9.Bb2 e5 10.Be2 Rb8 11.a3 Be7 12.Nc3 0-0 13.Ng5=; 8.Nc3 e5 9.0-0 Be7 10.Rb1 0-0 11.Ne4 Qc7 12.Nf6 Bf6 13.c4+=; 8.Bb2 e5 9.Nc3 Be7 10.Rb1 0-0 11.0-0 Nc6 12.e4 Bg4 13.Be2=) 8...Nc6 9.0-0 Bg4 10.Be2 Rc8 11.Nc3 e5 12.Rb1 e4 13.Ng5+=; A4) 7...d5 8.Nc3 (8.0-0 Bg4 9.Bb2 Nc6 10.Bb5 e6 11.h3 Bh5 12.d3 Rc8 13.Nbd2=; 8.Bb2 e6 9.0-0 Bd6 10.a4 Nc6 11.Bb5 0-0 12.d3 Qe7 13.c4=; 8.Ne5 g6 9.0-0 Bg7 10.Bb2 0-0 11.Nc3 Nc6 12.Nb5 a4 13.Be2=) 8...Bg4 9.Rb1 e5 10.Bf8 Kf8 11.Be2 Qc7 12.0-0 Kg8 13.Rb2=; B) 7.Be2 B1) 7...Nc6 8.d4 (8.Nc3 e5 9.Bf8 Rf8 10.0-0 d6 11.Rb1 Qe7 12.e4 Bg4 13.a3+=; 8.Bb2 e6 9.0-0 d5 10.Nc3 Be7 11.Rb1 0-0 12.Na4 Rb8 13.Nb6=; 8.0-0 d5 9.Nc3 Bg4 10.Rb1 Rb8 11.d4 Bf3 12.Bf3 e6 13.Bf8+=) 8...d5 9.0-0 Bg4 10.Nbd2 Rc8 11.Rb1 Qc7 12.c4 Be6 13.Qa4+/–; B2) 7...d6 8.d4 (8.0-0 b5 9.Bb2 e5 10.a3 Bf5 11.Nc3 Rc8 12.Nb5 Bc2 13.Qe1+=; 8.Nc3 e5 9.Rb1 Qc7 10.Bb2 Be7 11.0-0 0-0 12.a3 d5 13.d4=; 8.Bb2 e5 9.0-0 Be7 10.c4 0-0 11.Nc3 Bf5 12.d4 Nc6 13.d5=) 8...Bf5 9.c4 Rc8 10.0-0 Qd7 11.Nc3 Qc6 12.Nh4 Bd7 13.Rb1+=; B3) 7...Ne4 8.0-0 (8.d3 Nf6 9.0-0 d5 10.c4 dc4 11.dc4 Qd1 12.Rd1 Nc6 13.c5+=; 8.Bb2 d5 9.d3 Nc5 10.Nc3 Nc6 11.Rb1 Bf5 12.0-0 Rc8 13.Ba3+=; 8.c4 Nc6 9.0-0 d6 10.d3 Nf6 11.Nbd2 e5 12.d4 Be7 13.d5+=) 8...Nc6 9.d3 Nf6 10.c4 d5 11.d4 Bg4 12.Nbd2 Rc8 13.Qb3+=; B4) 7...d5 8.0-0 (8.Bb2 e6 9.Nc3 Bd6 10.Rb1 0-0 11.a4 e5 12.0-0 Bf5 13.d4=; 8.Nc3 Qc7 9.Bb2 Bd7 10.a3 e5 11.h3 Bd6 12.Ra2 0-0 13.0-0+=; 8.d4 Bf5 9.Ne5 Rc8 10.c4 Nc6 11.Qa4 Bd7 12.Qb3 Qc7 13.Nd7+=) 8...Nc6 9.Nc3 Bg4 10.Rb1 Rb8 11.d4 Bf3 12.Bf3 e6 13.Bf8+=.

6.Ba3 d5 A) 7.Bb2 A1) 7...Bg4 8.Bf6 (8.0-0 Qd6 9.h3 Bh5 10.a3 Rc8 11.Re1 Nd7 12.e4 Qc5 13.Ba4=; 8.h3 Bf3 9.Qf3 e6 10.Nc3 Bd6 11.Ne2 e5 12.Nc3 e4 13.Qe2=; 8.a3 e6 9.h3 Bh5 10.d3 Rc8 11.Nbd2 Be7 12.g4 Bg6 13.h4=) 8...ef6 9.h3 Be6 10.Nd4 Rc8 11.Qh5 Bd7 12.Qd5 Nd4 13.ed4=; A2) 7...Bd7 8.a4 (8.0-0 e6 9.Nc3 Bd6 10.Be2 e5 11.Nb5 Bg4 12.Nd6 Qd6 13.Rb1=; 8.Bf6 gf6 9.Nc3 Rg8 10.Rg1 e6 11.Qe2 Bd6 12.e4 d4 13.Bc6=; 8.Na3 e6 9.0-0 Bd6 10.Ba4 Na7 11.Bd7 Qd7 12.Bf6 gf6 13.Nb1=) 8...e6 9.Nc3 Bd6 10.0-0 0-0 11.Be2 e5 12.Nb5 Bc7 13.Ba3=; A3) 7...Ne4 8.a4 (8.0-0 Nd6 9.Be2 Bg4 10.h3 Bf3 11.Bf3 e6 12.d3 Rc8 13.a3=; 8.Ne5 Bd7 9.Nd7 Qd7 10.Qf3 e6 11.0-0 Nd6 12.Be2 Nc4 13.Bc4=; 8.Nc3 Nd6 9.Qe2 Bd7 10.Nd5 Nb5 11.Qb5 Nb4 12.Qb7 Nc2 13.Kd1+=) 8...Bg4 9.h3 Bh5 10.g4 Bg6 11.Ne5 Qd6 12.h4 h5 13.g5+=; A4) 7...e6 8.Ne5 Qc7 9.f4 Bd6 10.Ng4 Ng4 11.Qg4 f6 12.Qh5 Qf7 13.Qf7=; B) 7.Ne5 B1) 7...Qc7 8.d4 (8.Bb2 e6 9.f4 Bd6 10.Ng4 Ng4 11.Qg4 f6 12.Qh5 Qf7 13.Qf7=) 8...Bd7 9.Nd7 Nd7 10.0-0 e5 11.Bf8 Nf8 12.Nc3 Rd8 13.Qf3+=; B2) 7...Bd7 8.Nd7 Qd7 9.Bb2 Qf5 10.0-0 e6 11.Bd3 Qg5 12.f4 Qh4 13.Nc3=; C) 7.Nc3 C1) 7...Bg4 8.Rb1 (8.h3 Bh5 9.Rb1 Rc8 10.g4 Bg6 11.Ba4 Qd7 12.Ne5 Qe6 13.f4+/– 1.34; 8.Bb2 e6 9.h3 Bf3 10.Qf3 Bd6 11.Ne2 e5 12.Nc3 e4 13.Qe2=; 8.Qe2 Rc8 9.h3 Bh5 10.Rb1 Ne4 11.Bb2 e6 12.g4 Bg6 13.Ne4=) 8...Rc8 9.h3 Bh5 10.g4 Bg6 11.Ba4 Qd7 12.Ne5 Qe6 13.f4+–; C2) 7...Ne4 8.Ne5 (8.Ne4 de4 9.Nd4 Bd7 10.Rb1 Nd4 11.ed4 Bb5 12.Rb5 Qd4 13.Rb7=; 8.Bb2 Nd6 9.Qe2 Nb5 10.Qb5 e6 11.0-0 Bd7 12.Qe2 Be7 13.a3=; 8.Ne2 Nd6 9.Rb1 Nb5 10.Rb5 Na7 11.Rb1 b5 12.0-0 b4 13.Bb2=) 8...Bd7 9.Bc6 Bc6 10.Qf3 Ng5 11.Qg4 h6 12.0-0 Qc8 13.Qf4+=; C3) 7...Bd7 8.Qb1 (8.0-0 Qc7 9.Ba4 Bg4 10.Rb1 e5 11.Bf8 Rf8 12.h3 Bf3 13.Qf3+=; 8.Rb1 Qc7 9.Ba4 e5 10.Nb5 Qb8 11.Bf8 Rf8 12.0-0 e4 13.Ne1+=; 8.Qe2 Bg4 9.h3 Bf5 10.Ba4 Rc8 11.Rb1 Qd7 12.Qb5 Rc7 13.Qb6+/–) 8...Rc8 9.Qb3 Be6 10.Ba4 Qd7 11.Qb6 Ne4 12.Ne5 Qc7 13.Qc7+/–; C4) 7...Qc7 8.0-0 (8.Rb1 Bg4 9.h3 Bd7 10.Ba4 Na7 11.Bd7 Qd7 12.Bc5 Nc6 13.Na4+=; 8.h3 e5 9.Bf8 Kf8 10.Rb1 Kg8 11.Bc6 bc6 12.d4 e4 13.Ne5+=; 8.Rc1 Bg4 9.h3 Bd7 10.0-0 e5 11.Bf8 Rf8 12.Be2 Be6 13.d4+=) 8...Bg4 9.h3 Bd7 10.Be2 Bf5 11.Rb1 Rc8 12.Nb5 Qd7 13.Nbd4+=; D) 7.0-0 D1) 7...Bd7 8.d4 (8.c4 Rc8 9.cd5 Nd5 10.d4 Nc7 11.Bd3 b5 12.Nbd2 b4 13.Bb2+=; 8.d3 Rc8 9.Nbd2 Nb4 10.Bd7 Qd7 11.Bb4 ab4 12.Rb1 e6 13.Rb2=; 8.Bb2 e6 9.d3 Bd6 10.Nbd2 Rc8 11.e4 Be7 12.c4 0-0 13.e5=) 8...Bg4 9.c4 dc4 10.Bc4 e5 11.Qb3 Ba3 12.Ne5 Ne5 13.de5+=; D2) 7...Ne4 8.c4 (8.Ne5 Bd7 9.Nd7 Qd7 10.d3 Nd6 11.Bd6 Qd6 12.Nd2 e5 13.c4+=; 8.d3 Nd6 9.Ba4 Bg4 10.h3 Bh5 11.Nbd2 Qc7 12.Rb1 e6 13.Bc5+=; 8.Bb2 Nd6 9.a4 f6 10.Nh4 g6 11.Nc3 e5 12.f4 d4 13.ed4=) 8...dc4 9.Bc4 e5 10.Bf8 Rf8 11.d4 Bg4 12.h3 Bf3 13.Qf3+=; D3) 7...Bg4 8.d4 (8.Bb2 e6 9.h3 Bh5 10.Bd4 Bd6 11.g4 Bg6 12.Ne5 0-0 13.Nc6+=; 8.d3 e5 9.Bf8 Rf8 10.h3 Bf3 11.Qf3 Qd6 12.Qg3 Rg8 13.d4+=; 8.h3 Bd7 9.Nc3 Qc7 10.Be2 Bf5 11.Rb1 Rc8 12.Nb5 Qd7 13.Nbd4+=) 8...Rc8 9.Bd3 g6 10.Nbd2 Bg7 11.Rb1 Qd7 12.Bc5 0-0 13.c4+=.

6.Ba3 d6 7.0-0 A) 7...e5 8.d4 (8.Nc3 Bd7 9.Rb1 Be7 10.e4 0-0 11.Ba4 b6 12.Qe2 Nd4 13.Nd4+=; 8.c4 e4 9.Nd4 Bd7 10.d3 Nd4 11.Bd7 Qd7 12.ed4 d5 13.Bf8+=; 8.Bb2 Bg4 9.h3 Bh5 10.Nc3 Be7 11.d3 0-0 12.Qe2 Rc8 13.Rfb1+=) 8...e4 9.d5 Bd7 10.Nfd2 Ne5 11.Bd7 Ned7 12.Nc3 Qe7 13.Nb5+/–; B) 7...e6 8.Nc3 (8.Bb2 Be7 9.Nc3 0-0 10.e4 Qc7 11.Rb1 e5 12.h3 Na7 13.d3=; 8.Qe2 Be7 9.Nc3 0-0 10.Rfb1 e5 11.Qd3 Nb4 12.Bb4 ab4 13.Ne4=; 8.d4 Be7 9.c4 0-0 10.Nbd2 Na7 11.Ba4 Bd7 12.Rb1 Rb8 13.Bd7=) 8...Be7 9.Rb1 0-0 10.e4 Qc7 11.Qe2 e5 12.Bc4 Bg4 13.Nb5+=; C) 7...Qc7 8.d4 (8.Nc3 d5 9.Ba4 Bg4 10.Rb1 e5 11.Bf8 Rf8 12.h3 Bf3 13.Qf3+=; 8.c4 e6 9.d4 Bd7 10.Bb2 Be7 11.d5 Nd8 12.Qa4 0-0 13.Rc1=; 8.d3 e5 9.c4 Be7 10.Nc3 0-0 11.Nd5 Nd5 12.cd5 Na7 13.Rc1=) 8...Bd7 9.c4 e6 10.Bb2 Be7 11.Nc3 Rc8 12.e4 Na7 13.Bd7+=; D) 7...g6 8.Bb2 (8.d4 Bg7 9.c4 0-0 10.Nc3 Bg4 11.h3 Bf5 12.Qb3 Rc8 13.Rfd1=; 8.c4 Bg7 9.d4 0-0 10.Bb2 Bf5 11.Nc3 Rc8 12.Qe2 Na7 13.Ba4=; 8.Nc3 Bg7 9.Bb2 0-0 10.Rb1 d5 11.d3 Qd6 12.e4 d4 13.Ne2=) 8...Bg7 9.Nc3 0-0 10.Rb1 Bg4 11.h3 Bf5 12.Re1 d5 13.d3=.

6.Ba3 d6 7.Nc3 A) 7...Bg4 8.h3 (8.0-0 d5 9.h3 Bh5 10.Ba4 Qd7 11.Rb1 Rd8 12.Bc5 Ne4 13.Ne4=; 8.Rb1 e5 9.h3 Bd7 10.e4 Be7 11.Ba4 Rb8 12.Qe2 0-0 13.0-0+=; 8.Bb2 e5 9.h3 Bd7 10.Rb1 Be7 11.e4 0-0 12.0-0 Qc7 13.a3=) 8...Bf5 9.0-0 Rc8 10.Re1 e5 11.e4 Bd7 12.Rb1 Be7 13.Nd5+=; B) 7...Bf5 8.d3 (8.Qe2 d5 9.0-0 Rc8 10.Rfe1 Bg4 11.h3 Bh5 12.Bb2 Qd6 13.Bd3=; 8.0-0 Rc8 9.Re1 e5 10.e4 Bg4 11.Nd5 Be7 12.h3 Bf3 13.Qf3+=; 8.Rb1 Qc7 9.0-0 e5 10.Re1 e4 11.Nd4 Bd7 12.Qe2 d5 13.Bf8+=) 8...e5 9.d4 Nd7 10.0-0 Rc8 11.Nd5 e4 12.Nd2 Qg5 13.c4+=; C) 7...d5 8.Ne5 (8.0-0 Bg4 9.h3 Bh5 10.d3 Rc8 11.g4 Bg6 12.Rb1 e5 13.Bf8=; 8.Rb1 Bg4 9.h3 Bf3 10.Qf3 e5 11.Bf8 Kf8 12.0-0 Kg8 13.Rb2+=; 8.Qb1 Bg4 9.Ne5 Bd7 10.f4 e6 11.Bf8 Rf8 12.0-0 Ne5 13.fe5=) 8...Qc7 9.f4 Bf5 10.Rb1 e6 11.Ba4 Bb4 12.Bb4 ab4 13.Rb4+/–; D) 7...Bd7 8.e4 (8.Rb1 e5 9.e4 Be7 10.Bc4 Rb8 11.0-0 0-0 12.Qe2 Be6 13.Nd5+=; 8.0-0 e5 9.Rb1 Be7 10.Bc4 e4 11.Ng5 d5 12.Be7 Ne7 13.Bb5=; 8.Bc4 e5 9.e4 Be7 10.Rb1 Rb8 11.0-0 0-0 12.Qe2 Be6 13.Nd5+=) 8...e5 9.Rb1 Be7 10.Bc4 Rb8 11.0-0 0-0 12.Qe2 Be6 13.Nd5+=.

6.Ba3 d6 7.Nd4 Bd7 (7...Qc7 8.Ba4 (8.Nc3 e5 9.Nb3 Be7 10.0-0 0-0 11.Rb1 Nb4 12.Rb2 d5 13.Qb1=; 8.Ne2 e5 9.d4 Be6 10.Nbc3 ed4 11.Nd4 Be7 12.Ba4 Rd8 13.Ncb5=; 8.0-0 e5 9.Ne2 Be7 10.f4 e4 11.Nbc3 0-0 12.Ng3 Bg4 13.Be2=) 8...e5 9.Nb5 Qd8 10.0-0 Be7 11.N1c3 0-0 12.Qf3 Bg4 13.Qg3=) 8.Bc6 (8.Nc3 e5 9.Nb3 Be7 10.0-0 0-0 11.Qf3 Nb4 12.Bb4 ab4 13.Bd7=; 8.Ne2 e5 9.0-0 Be7 10.Nbc3 0-0 11.Rb1 Rc8 12.e4 d5 13.Be7=; 8.0-0 Nd4 9.Bd7 Qd7 10.ed4 b5 11.Re1 e6 12.Qf3 Rc8 13.c3+=; 8.Be2 e5 9.Nb5 Be6 10.d4 Be7 11.N1c3 Nb4 12.e4 d5 13.ed5=) 8...Bc6 (8...bc6 9.0-0 e5 10.Ne2 Rb8 11.Nbc3 Be7 12.f4 ef4 13.Nf4+=) 9.Nc6 (9.0-0 Bd7 10.Nc3 e5 11.Ndb5 Bg4 12.f3 Be6 13.Rb1=) 9...bc6 10.Qf3 Qc7 (10...d5 11.Nc3 e5 12.Bf8 Rf8 13.Qg3=) 11.0-0 g6 (11...e6 12.Nc3 Be7 13.Nb5=) 12.Nc3 Bg7 13.Rab1 0-0 14.Ne4 Rab8 (14...Ne4 15.Qe4 Rab8 16.c4=) 15.Nf6 (better is 15.Bd6!? ed6 16.Nf6 Kh8 17.d4+/–) 15...Bf6= 16.d4 d5 17.Qe2 Bg7 18.c4 e6? (18...Rfd8 19.Qc2 dc4 20.Rb8 Rb8 21.Qc4+=) 19.Qc2?? (19.Bf8 Rb1 20.Rb1 Bf8+–) 19...Kh8? (better is 19...Rb1 20.Rb1 Rb8=) 20.cd5 ed5 21.Rfc1?? (better is 21.Bf8 Rf8 22.Rb3+–) 21...Rb1+/– 22.Rb1 Kg8?? (22...Re8 23.Bc5+=) 23.g3?? (23.Bf8 Bf8 24.Rc1 Bb4+–) 23...f5?? (23...Re8 24.Rc1 Rc8 25.Qa4+=) 24.Bc5?? (better is 24.Bf8 Bf8 25.Rc1+–) 24...Rb8+= 25.Rb3 Rb3 26.Qb3 Bf8 27.Qa3 Bc5 28.Qc5 a4 (28...Kf7 29.a3=) 29.a3 Kg7 (29...Qb7!?+=) 30.Qc2+/– Qb6 31.Qa4 Qb1 32.Kg2 Qe4 33.Kf1 Qb1 34.Ke2 Qa2 35.Kf3 1–0. Vila Vila,Ricard (1860) – Tena Lameiro,Josep Maria (1700), Vic ESP, 2011.

6.Ba3 d6 7.c4 A) 7...Bf5 8.d4 (8.d3 Rc8 9.0-0 e5 10.e4 Bg4 11.h3 Bh5 12.Nc3 Be7 13.Bc1=; 8.0-0 Bd3 9.Re1 e5 10.Qb3 e4 11.Nd4 Rc8 12.f3 d5 13.cd5+=; 8.Bb2 d5 9.Qa4 dc4 10.Bf6 ef6 11.Bc6 bc6 12.Qc6 Bd7 13.Qc4+=) 8...d5 9.Nc3 Rc8 10.0-0 e6 11.Bf8 Kf8 12.c5 b6 13.Na4+/–; B) 7...Bg4 8.0-0 (8.h3 Bd7 9.0-0 Rc8 10.Nc3 e6 11.Rb1 Be7 12.Ba4 Qc7 13.Nb5+=; 8.d4 d5 9.Nc3 Rc8 10.Rc1 e6 11.Bf8 Rf8 12.cd5 Nd5 13.Ne4+=; 8.Nc3 e5 9.h3 Bh5 10.d3 Be7 11.g4 Bg6 12.g5 Nd7 13.Nh4+=) 8...Rc8 9.d4 Nd7 10.Nbd2 e6 11.h3 Bh5 12.Qa4 Nf6 13.Qb3+/–; C) 7...Bd7 8.0-0 (8.d4 Rc8 9.0-0 e6 10.Nbd2 Be7 11.e4 0-0 12.Rb1 Qe8 13.Qa4+/–; 8.Nc3 e6 9.d4 Rc8 10.0-0 Na7 11.Bd7 Qd7 12.Qb3 Be7 13.Rab1+=; 8.d3 g6 9.0-0 Bg7 10.Bb2 0-0 11.Nc3 Rc8 12.Rb1 Qc7 13.Qe2+=) 8...e5 9.d4 e4 10.Nfd2 Na7 11.Bd7 Qd7 12.Nc3 Rc8 13.Rc1+/–; D) 7...e6 8.0-0 (8.d4 Bd7 9.0-0 Be7 10.Nc3 0-0 11.Rb1 Na7 12.Bd7 Qd7 13.Qb3+=; 8.Nc3 Be7 9.0-0 0-0 10.Rb1 e5 11.d4 ed4 12.Nd4 Qc7 13.e4+=; 8.Bb2 Be7 9.0-0 0-0 10.Nc3 d5 11.cd5 ed5 12.d3 Bg4 13.h3=) 8...Be7 9.Nc3 0-0 10.d3 e5 11.d4 ed4 12.Nd4 Qc7 13.Rc1+=.

6.Ba3 d6 7.d4 A) 7...d5 8.Nbd2 (8.c4 Bg4 9.Nc3 Rc8 10.Rc1 g6 11.cd5 Nd5 12.h3 Nc3 13.Rc3+=; 8.0-0 Bg4 9.c4 dc4 10.Bc4 Rc8 11.Qb3 e6 12.Bf8 Rf8 13.Nbd2+/–; 8.Ne5 Bd7 9.Nd7 Nd7 10.0-0 e6 11.Bf8 Nf8 12.c4 dc4 13.Nd2+=) 8...Bg4 9.c4 dc4 10.Nc4 Rc8 11.Nce5 Be6 12.Rc1 Bd5 13.Qa4+/–; B) 7...Bd7 8.c4 (8.0-0 Rc8 9.c4 e6 10.Nbd2 Be7 11.e4 0-0 12.Rb1 Qe8 13.Qa4+/–; 8.Nbd2 Nd5 9.Bb2 Nc7 10.Bd3 d5 11.0-0 Nb4 12.Be2 Bf5 13.c4+=; 8.Bb2 e5 9.de5 de5 10.Nbd2 Bb4 11.0-0 Rc8 12.Rb1 Bd2 13.Qd2+=) 8...e5 9.0-0 e4 10.Nfd2 Na7 11.Bd7 Qd7 12.Nc3 Rc8 13.Rc1+/–; C) 7...Nd5 8.0-0 (8.c4 Nc7 9.Ba4 Bd7 10.Nc3 Na6 11.Rb1 Rb8 12.e4 e6 13.0-0+/–; 8.Bc4 Nc7 9.Bd3 Bg4 10.h3 Bh5 11.c4 Ra7 12.Nc3 e6 13.g4+=; 8.e4 Nc7 9.Be2 b5 10.d5 Na7 11.0-0 e5 12.de6 Be6 13.Nd4+=) 8...Bg4 9.c4 Nc7 10.Ba4 e6 11.Nbd2 Rb8 12.Rb1 Ke7 13.Qb3+–; D) 7...e6 8.c4 (8.0-0 Be7 9.c4 0-0 10.Nbd2 Bd7 11.Rb1 Qc7 12.e4 Rfc8 13.Re1+=; 8.Nc3 Bd7 9.Rb1 Rc8 10.0-0 Na7 11.Qd3 Be7 12.Bd7 Qd7 13.d5+=; 8.Nbd2 Be7 9.0-0 0-0 10.Rb1 Na7 11.Bd3 Nd5 12.Rb2 b5 13.c4=) 8...Bd7 9.0-0 Rc8 10.Nc3 Na7 11.Bd7 Qd7 12.Qb3 Be7 13.Rab1+=.

6.Ba3 g6 A) 7.0-0 A1) 7...d6 8.c4 (8.Bb2 Bg7 9.Nc3 0-0 10.Rb1 Bg4 11.h3 Bf5 12.Re1 d5 13.d3=; 8.d4 Bg7 9.c4 0-0 10.Nc3 Bg4 11.h3 Bf5 12.Qe2 Ne4 13.Bb2+=; 8.Nc3 Bg7 9.Rb1 0-0 10.Be2 d5 11.d4 Rb8 12.Ne5 Qc7 13.Nc6+=) 8...Bg7 9.Bb2 0-0 10.Nc3 Bg4 11.h3 Bf5 12.d3 Na7 13.Ba4+=; A2) 7...d5 8.c4 (8.d4 Bg7 9.c4 0-0 10.cd5 Nd5 11.Bc5 Bg4 12.h3 Bf5 13.Re1+=; 8.Ne5 Qc7 9.d4 Bg7 10.c4 0-0 11.cd5 Nd5 12.Nc6 bc6 13.Ba4=; 8.Qe2 Bg7 9.d4 0-0 10.Rc1 Bf5 11.c4 Na7 12.cd5 Nd5 13.Nbd2+=) 8...Bg7 9.d4 0-0 10.cd5 Nd5 11.Qb3 Bg4 12.Nbd2 Qd7 13.Rfc1+=; A3) 7...Qc7 8.c4 (8.d4 Bg7 9.c4 Na7 10.Qd3 Nb5 11.cb5 d6 12.Rc1 Qb6 13.e4+=; 8.Nc3 Bg7 9.Be2 d6 10.Bb2 0-0 11.Nb5 Qd8 12.Rb1 d5 13.Nbd4+=; 8.Be2 Bg7 9.Nc3 0-0 10.Nb5 Qd8 11.d4 d6 12.c4 Bf5 13.Bb2+=) 8...Bg7 9.Nc3 0-0 10.d4 d6 11.Nd5 Nd5 12.cd5 Nb4 13.Qb3+=; A4) 7...Bg7 8.d4 (8.c4 0-0 9.d4 d6 10.Nc3 Bg4 11.h3 Bf5 12.Qb3 Rc8 13.Ba4=; 8.Nc3 0-0 9.Rb1 d5 10.Bb2 Qc7 11.Ba4 Bg4 12.h3 Bf5 13.Nb5=; 8.Bb2 0-0 9.c4 Na7 10.Bf6 Bf6 11.d4 d5 12.Nc3 Nb5 13.cb5=) 8...0-0 9.Nbd2 d5 10.Rc1 Bf5 11.c4 Na7 12.Qb3 dc4 13.Bc4+=; B) 7.c4 B1) 7...Na7 8.Ba4 Bg7 9.d4 0-0 10.Nc3 d6 11.Rb1 Qc7 12.c5 Bf5 13.Bc2+=; B2) 7...Qc7 8.Nc3 (8.0-0 Bg7 9.d4 0-0 10.Nc3 d6 11.Nd5 Nd5 12.cd5 Nb4 13.Qb3+=; 8.Qb3 Bg7 9.d4 d6 10.Nc3 0-0 11.Nd5 Qd8 12.Ba4 Ra7 13.Nf6+=; 8.Bb2 Bg7 9.0-0 0-0 10.Nc3 d6 11.d4 Bg4 12.h3 Bf5 13.Qe2+=) 8...Bg7 9.d4 0-0 10.0-0 d6 11.Nd5 Nd5 12.cd5 Nb4 13.Qb3+=; B3) 7...Bg7 8.0-0 (8.d4 0-0 9.Nc3 d6 10.0-0 Bg4 11.h3 Bf5 12.Qb3 Rc8 13.Ba4=; 8.Nc3 0-0 9.d4 d6 10.0-0 Bg4 11.h3 Bf5 12.Qe2 Ne4 13.Bb2+=; 8.Bb2 0-0 9.0-0 Na7 10.Bf6 Bf6 11.Nc3 Bc3 12.dc3 d6 13.Qd3=) 8...0-0 9.d4 d6 10.Nc3 Bg4 11.h3 Bf5 12.Qe2 Ne4 13.Bb2+=; C) 7.Bb2 Bg7 8.a4 (8.Nc3 0-0 9.0-0 d5 10.Rb1 Qc7 11.Be2 Bf5 12.Nb5 Qd7 13.Nbd4=; 8.c4 0-0 9.0-0 Na7 10.Qb3 Nb5 11.Qb5 d5 12.cd5 Qd5 13.Qd5=; 8.0-0 0-0 9.c4 Na7 10.Bf6 Bf6 11.d4 d5 12.Nc3 Nb5 13.cb5=) 8...0-0 9.Nc3 d5 10.Rb1 Qc7 11.0-0 e5 12.Be2 Qd8 13.Nb5+=; D) 7.d4 D1) 7...Bg7 8.Qe2 (8.c4 0-0 9.0-0 d6 10.Nc3 Bf5 11.Bb2 Rc8 12.Qb3 Bg4 13.Rab1=; 8.0-0 0-0 9.c4 d6 10.Nc3 Bf5 11.Bb2 Rc8 12.Qe2 Na7 13.Ba4=; 8.Nbd2 0-0 9.0-0 d5 10.Rc1 Bf5 11.c4 Na7 12.Qb3 dc4 13.Bc4+=) 8...0-0 9.0-0 d6 10.Nbd2 Bf5 11.c4 Na7 12.Ba4 Nc6 13.e4+=; D2) 7...Qc7 8.0-0 (8.Nbd2 Bg7 9.c4 0-0 10.0-0 d6 11.Bb2 Bg4 12.Qb3 Na7 13.Ba4+=; 8.Qd2 Bg7 9.c4 0-0 10.Nc3 d6 11.Nd5 Qd8 12.0-0 Bg4 13.Rfb1=; 8.Ba4 Bg7 9.Nc3 0-0 10.Nb5 Qd8 11.0-0 d5 12.Qe2 Bf5 13.Rac1=) 8...Bg7 9.c4 0-0 10.Nc3 d6 11.Nd5 Nd5 12.cd5 Nb4 13.Qb3+=.

6.Bb2 Qb6 7.a4 e6 8.0-0 (8.Bf6 gf6 9.Nc3 Rg8+=) 8...Be7 9.d4 (9.Nc3 0-0+=) 9...0-0 (9...Na7 10.Ba3 Nb5 11.Be7 Ke7 12.ab5 Qb5 13.Na3=) 10.c4 d5 (10...d6 11.Nc3=) 11.Nbd2 Bb4 (11...Na7 12.c5 Qc7 13.Bd3+=) 12.Qc2 (12.Ba3 Bd7+=) 12...Bd2 (12...Bd7 13.Rfc1+=) 13.Nd2 Bd7 14.Ba3 (14.Qb3 Rac8+/–) 14...Rfe8 (14...Nb4 15.Bb4 ab4 16.Qb3+/–) 15.f4 (15.Rab1 Qc7+/–) 15...Rac8 (15...Nb4 16.Bb4 ab4 17.Bd7 Nd7 18.Qb3+=) 16.Rab1 Qc7 17.c5 Ng4 (17...Ne7 18.Bd3+=) ½–½. Suchsland,Helmut – Rudek,Karl, Bruchkoebel Seniors, 1993.

6.Bb2 d5 7.Ne5 Qd6 8.0-0 +=.

6.Bb2 e6 7.0-0 Na7 8.c4 Nb5 9.cb5 a4 10.Bf6 Qf6 11.Nc3 a3 12.Qb3 Be7 13.Na4 0-0 14.Nb6 Ra7?? (better is 14...Rb8+=) 15.Rac1+– Qb2 (15...d5 16.Rc2+–) 16.Nc8 (16.Rc8?! Qb3 17.ab3 d5+–) 16...Qb3 17.Ne7 Kh8 18.ab3 a2 19.Ne5 g6 20.Nc8 Ra8 21.Nd6 Kg7 22.Ra1 Ra3 (22...f6 23.Nd3+–) 23.Rfc1 (23.Nec4 Rb3 24.Ra2 Kf6+–) 23...f6 (23...Rfa8 24.Rc3 R3a7 25.Nd7+–) 24.Nd7 Rd8 25.Rc7 Ra5 (25...g5 26.Nb7 Rd7 27.Rd7 Kg6 28.Nc5+–) 26.Nc5 (better is 26.Nb7 Rda8 27.Na5 Ra5+–) 26...Kg8 27.Nde4 f5 28.Nf6 1–0. Maci – Bob19, playchess.de, 2005.

6.c4 e6 7.h3 Nb4 8.a3 (better 8.d3!?+=) 8...Nd3=+ 9.Kf1 (9.Ke2 Ne4 10.Rf1 Qf6=+) 9...Be7 (9...Ne4!? 10.Rg1 Nef2–+) 10.Ke2 Nc1 11.Qc1 0-0 12.Re1 d5 13.Kf1 dc4 14.Bc4 Nd5 (14...b6 15.Qb2=+) 15.Nc3 Bf6 16.Ra2 (16.Bd5 ed5 17.Qb2 b6=) 16...Nc3=+ 17.dc3 Qc7 18.Bb5 b6 The isolani on c3 becomes a target (worse 18...Bc3 19.Nd4 Rd8 20.Rc2+=) 19.a4 Bb7 (19...Bc3? 20.Rc2+–) 20.Nd4? (20.e4 Rfd8–/+ (worse 20...Bc3 21.Rc2 Rfc8 22.Rd1+=)) 20...Rfd8 (better 20...Qh2!? 21.Bc6 Bc6 22.Nc6 Qh1 23.Ke2 Qg2–+) 21.Kg1–/+ Rac8 22.Rc2 e5 23.Nf3 Bf3 24.gf3 Qb7 25.Kg2 e4 26.f4 Qc7 27.c4 Qc5 28.Rd1 Qh5 29.Rd5 Qf3 30.Kg1 (30.Kh2 Bh4 31.Rd8 Rd8=+) 30...Rd5 (better 30...Qh3!? 31.Qd1 Qf5–/+) 31.cd5= Rc2 32.Qc2 g6 (32...Qh3!? 33.Be2 Qf5=) 33.d6 1–0. b4_Bb2 (1660) – uloose (1660), lichess.org, 2020.

5.Bb2 Nc6 6.Nc3 Qb6 7.Rb1 Qc7 8.Nf3 e6 9.0-0 Be7 10.Na4 0-0 11.c4 d5 (11...d6 12.Nc3+=) 12.cd5 Nd5 13.Qb3 Bf6 (13...Bd7 14.Rfc1+=) 14.Rfc1 Bb2 15.Qb2 Qe7 (15...Bd7 16.d4+–) 16.e4 Ndb4 17.Nb6 Rb8 (17...Ra7+–) 18.a3 Na6? (18...f5 19.ab4 fe4+–) 19.Ba6 ba6 20.Rc6 Bb7 21.Rcc1 (better 21.Rc4+–) 21...Be4 22.Ne5?? (better 22.Nd5 ed5 23.Qb8 Bb1 24.Qb1 Qa3 25.Re1+–) 22...Qa7?? (22...Qg5 23.g3 Bb1 24.f4+= (worse 24.Rb1 Rb6 25.Qb6 Qe5=+)) 23.Qd4 (better 23.d3 f6 24.Ned7 Bd3 25.Nb8 Rb8 26.Rc8 Rc8 27.Nc8+–) 23...Bb1+– 24.Rb1 Rfd8 25.Qe3 f6?? (better 25...Qc7 26.d3 Rd5=) 26.Nc6+– Rb6 (26...Qf7 27.Nd8 Rd8 28.d4+–) 27.Rb6 (27.Na7?? Rb1 28.Qe1 Re1; 27.Qb6?! Qb6 28.Rb6 Rd2+–) 27...Rd2 (27...Qc7 28.Qe6 Kf8+–) 28.Qe6 (28.Na7?? Rd1 29.Qe1 Re1; 28.Qd2?! Qb6 29.Qd8 Qd8 30.Nd8 e5+–) 28...Qf7 (28...Kf8 29.Kf1 Qc7 30.Rb8 Qb8 31.Nb8 Rd8+–) 29.Rb8 (29.Rb8 Rd8 30.Rd8) 1–0. FeegLood (2480) – GianFresco (2260), lichess.org, 2016.

5.Nc3 e5 6.Nf3 Qc7 7.0-0 =.

5.Nc3 g6 6.Nf3 (6.Bb2 Bg7+/–) 6...Bg7+= 7.Bb2 0-0 8.a4 Nc6 9.0-0 Nb4 10.d4 b6 (10...d5!?=) 11.Ba3 Ba6 12.Ba6 Na6 13.Nb5 Rc8 14.Rc1 Rc4 (14...d5 15.Qd3+=) 15.c3 (15.Qd3 Ra4 16.Qb3 Ra3 17.Na3 h6+/–) 15...d6 (15...Ne4!?=) 16.Nd2 Rc8 17.Qf3 Qd7 18.Rc2 Nc7 19.Rb1 Nb5 20.Rb5 Rc6 21.c4 White plans d5 21...Rfc8 22.d5 R6c7 23.Qe2 (23.Rb6?! Qa4 24.Rb3 Nd7=) 23...e6 24.e4 (worse is 24.Rb6 Qa4 25.Qd3 Nd5–/+) 24...ed5 25.ed5 Re8 26.Qd3 Ng4 27.g3 Qe7 28.Rc1 Qe2 29.Qe2 Re2 30.h3?? (better is 30.Bd6 Rc8 31.Nb3+=) 30...Nf2–/+ (30...Rd2?! 31.Bd6 Rc8 32.hg4=) 31.Nf1?? (better is 31.Bd6 Rc8 32.Nb3 Nh3 33.Kh1 Nf2 34.Kg1–+) 31...Nh3–+ 32.Kh1 Bd4 (better is 32...Nf2 33.Kg2 Nd3 34.Kf3 Nc1–+) 33.Rb2 (33.Bd6 Rd7 34.Bf4 Nf2 35.Kg2 Nd3 36.Kh3 Nc1 37.Bc1–+) 33...Rb2 (better is 33...Nf2 34.Kg2 Bb2 35.Bb2 Nd3 36.Kg1 Nb2 37.Nh2–+) 34.Bb2 Bb2 35.Rc2 Be5 36.Ne3 (36.Kg2 Ng5 37.Nd2 f5–+) 36...Ng5 37.Kg2 Ne4 0–1. Fournier,Frederic – Ben Il Mostro (1905), Partie amicale, 3m + 3s, 2008.

5.c4 Nc6 6.d4 =.

5.c4 g6 6.Bb2 Bg7 7.Nc3 (7.d4 0-0+=) 7...0-0 8.Nf3 Nc6 (8...d6 9.0-0+=) 9.0-0 Nb4 (9...d5 10.c5+=) 10.d4 d5 11.a3 Na6 12.c5 b6 13.c6 The passed pawn on c6 will become decisive later 13...Nc7 14.a4 (14.Rc1 Nb5 15.Nb5 Ne4+=) 14...Ne4 (14...Bg4 15.Rc1+=) 15.Ne4 de4 16.Nd2 Qd5 17.Qb3 Qb3 18.Nb3 Ba6 (18...Nb5 19.ab5 Be6 20.Nd2+/–) 19.Rfc1 (better is 19.Ba6 Ra6 20.Rfc1+–) 19...Bb5= 20.ab5 Nb5 21.Nd2 f5 22.Nc4 Rab8 23.Ne5 Be5 24.de5 Kf7 25.c7 Rbc8 26.Rc6 Rc7 (26...e6 27.Rb6 Nc7 28.Ra5=) 27.Rb6+= Nc3 28.e6 Kg8 29.Kf1 (29.Ra5 Rd8 30.h3 Rd2+=) 29...Rd8 (better is 29...Ra8!?+=) 30.Bc3 Rc3 31.Ra5 Rd2 (31...Rc2 32.Ke1 Rdd2–+) 32.Ke1 (32.Ra8 Kg7 33.Ke1–/+) 32...Rcc2–/+ 33.Rb7 Kg7 (33...Re2!? 34.Kd1 Rcd2 35.Kc1 Rf2 36.Re7 Ra2 37.Ra2 Ra2+=) 34.Re7+= Kh6 (34...Kf6 35.Rh7 Ke6 36.Ra6 Rd6 37.Rd6 Kd6 38.Rh6+/–) 35.Rd7 (35.Raa7 Re2 36.Kd1 Kg5 37.h4 Kg4 38.Rh7 Red2 39.Ke1 Rf2=) 35...Re2 36.Kd1 Rf2 37.Rad5 (better is 37.e7!? Rb2 38.Ke1 Rg2 39.Rd2 Rgd2 40.e8Q Rh2 41.Qf8 Kg5 42.Rf5 gf5 43.Qg7 Kh5 44.Qh7 Kg4 45.Qg6 Kf3 46.Qf5 Ke3 47.Qc5 Kf4 48.Qd6 Kf3 49.Qf6 Ke3 50.Qc3 Kf4 51.Qf6 Kg4 52.Qg6 Kh3 53.Qh5 Kg2 54.Qg6 Kh1 55.Qe4 Kg1 56.Qg4 Rbg2 57.Qd4 Kh1 58.Qe4–/+) 37...Rb2–/+ Threatening mate... how? 38.Rd2 Rfd2 39.Rd2 Rb6?? (better is 39...Rd2 40.Kd2 Kg7–/+) 40.e7+= Re6 41.Rd7 Kg5 42.g3 (42.g4 Kg4 43.Kd2 g5–/+) 42...h5 43.Ke2 (43.g4 hg4 44.Rc7–+) 43...Kf6–/+ 44.h3 Kf7 (44...Re7 45.Rd6 Re6 46.Rd8–/+) 45.g4 (45.e8Q!? Ke8 46.Rc7–/+) 45...Re7–+ 46.Rd5 Kf6 47.Kf2 (47.gf5 gf5 48.Rd8 Ra7–/+) 47...Kg5 (47...hg4 48.hg4 fg4 49.Kg3–+) 48.gh5 Kh5 49.Kg3 Ra7 50.Kf4 Ra1 (50...Ra3 51.Rd8 Kh6 52.h4–/+) 51.Rd8 Threatening mate: Rh8 51...Rf1 (51...Rf1 52.Ke5 Rh1–/+) 0–1. Zylla,Johannes – Bassy, BSF–Vereinspokal, 1994.

5.c4 g6 6.d4 Ne4 +=.

5.d4 Nc6 6.Nf3 +=.

5.d4 g6 6.Nd2 (6.Nf3 Bg7+=) 6...Bg7 7.Ngf3 0-0 8.e4 (8.0-0 d5+=) 8...d5 9.e5 Ne8 10.0-0 (10.Rb1 Nc7=) 10...Nc7 11.Rb1 Nb5 12.Rb5 b6 13.Re1 Ba6 14.Rb1 b5 (14...Nc6 15.a4=) 15.c3 (15.e6 fe6 16.Ng5 Qb6=) 15...e6 (15...Qc7 16.Qb3 e6 17.Ba3=) 16.a4 (16.Ba3 Re8+=) 16...ba4 (16...Qd7 17.Ra1=) 17.Ba3 Re8 18.Qa4 (18.Bd6 Qd7=) 18...Bd3 (18...Qd7 19.Qc2=) 19.Rb7+= Qc8 20.Re3 (better 20.Rc7 Qd8 21.c4+=) 20...Qb7?? (better 20...Bc2! 21.Qb5 Bh6=) 21.Qe8 Bf8 22.Qf8 1–0. marekt – Puskas, GameColony.com, 2002.

5.Qf3 e6 6.Ba3 (6.a4!?+=) 6...Ba3= 7.Na3 0-0 8.Nc4 d5 9.Nb2 Nc6 (9...Bd7 10.Bf1=) 10.Bc6 (10.a4 Nb4 11.Rc1 Bd7=) 10...bc6 (10...Qb6 11.Nd1 Qc6 12.c3=) 11.Ne2 (11.Qf4 Qb6 12.Nd3 c5+=) 11...Ba6 12.0-0 (better is 12.Nc1=) 12...Ne4–+ 13.Rfd1? (13.Rad1 Ng5 14.Qh5–+) 13...Rb8 (better is 13...Ng5 14.Qh5 g6–+) 14.Nd3+= Qd6 15.Nc3 (better is 15.Ne1!?+=) 15...Nc3–/+ 16.dc3 Qa3 17.e4 Qc3 18.ed5 (better is 18.Rac1–/+) 18...ed5 (18...cd5!? 19.Rdc1–+) 19.Qe2 0–1. Siepe,Hans Joachim – Dittmann,Rolf (1825), Sauerland Bezirksliga, 2002.

5.Nf3 e6 6.0-0 Nc6 7.a4 Be7 8.d4 0-0 9.c4 d5 10.c5 Bd7 11.Nc3 b6 12.cb6 Qb6 13.Rb1 Bb4 14.Bd2 Rfc8 15.Ne5 Ne5 16.de5 Bb5 (16...Bc3 17.Bd7 Nd7 18.Rb6 Nb6 19.Bc3 Rc3 20.Qd4=; worse is 16...Rc3 17.Bc3 Bb5 18.Bd4+/– (18.ef6?! Bf1 19.Qf1 Qd8 20.Bb4 ab4=; worse is 18.ab5 Bc3 19.ef6 Bf6+=)) 17.Nb5 Ne4 (17...Nd7 18.Nd6 Rd8 19.f4=) 18.Bb4+= ab4 19.Rb4 Nc3 20.Qb3 Nb5 21.Rb5 Qc7 22.f4 g6 23.Ra1 Qc3 (23...Ra5!?+/–) 24.Qc3+– Rc3 25.Kf2 Rc2 26.Kf3 Rc3 27.a5 d4 28.Ke2 Re3 29.Kd2 Rc3 (better is 29...Ra6!?+/–) 30.a6+– Rc6 (30...Kg7+–) 31.a7 Rcc8 32.Rb7 Kg7 33.Rd7 Rc4 34.Rb1 Ra4 35.Rbb7 Rf8 36.Rb8 (better is 36.Kd3+–) 36...Ra7+= 37.Ra7 Rb8 38.Ra2 Rb3 39.Ke2 h6 40.Rd2 Rb4 41.Kf3 g5 42.g3 Kg6 43.fg5 hg5 44.g4 f6 45.Ke4 d3! 46.Kf3? (46.Kd3 Rg4 Pinning (46...Rg4 Deflection; 46...Rg4 Clearance)) 46...Rf4 (better is 46...fe5!? 47.Ke3 e4 48.Rf2–+) 47.Kg3 Rd4 48.ef6 Kf6 49.h4? (49.Kf3–+) 49...gh4 50.Kh4 e5 51.Kh5 (51.Kg3–+) 51...e4 52.Kh6 (52.g5 Kg7 53.Ra2–+) 52...e3 53.g5 Kf7 54.Rd1 Rh4 0–1. croach (2370) – cristero (2485), net–chess.com, 2016.

5.Nf3 g6 6.Bb2 Bg7 7.c4 0-0 8.Nc3 b6 9.0-0 Bb7 10.d4 Bc6 11.a4 h6 12.Qc2 Bf3 13.gf3 Qc7 14.Kg2 d6 15.Rg1 Rc8 16.Qb3 e5 17.Kf1 (better is 17.Ne4+=) 17...ed4+= 18.ed4 d5 19.cd5 Qh2 20.Ne2 Qd6 21.Nc3 Qf4 22.Ne2 Qf5 23.Bc4 Ra7 24.Qb6 Rac7 25.Ng3?? (better is 25.Ba2–/+) 25...Qh3–+ 26.Rg2 Rc4 27.Qa5 Nh5 28.Nh5 Qh5 (28...gh5?! 29.Kg1–+) 29.Qb5 Bd4 30.Bd4 Rd4 31.Re1 (31.Qe2–+) 31...Rd5 32.Qb7 Qh1 33.Rg1 Qh3 34.Rg2 Rg5 35.f4 Qh1 36.Ke2 Re8 37.Kd2 Qe1 0–1. combijack (1815) – insuk (2010), gameknot.com, 2011.

4.Bb2 Nf6 5.Nf3 e6 6.Nc3 Be7 7.Be2 =.

4.Nc3 Nf6 (4...e5 5.d4=) 5.Bb2 (5.Nf3 Qc7=) 5...e6 (5...e5 6.Rb1=) 6.f4 (6.e4 Be7=) 6...Bb7 (6...a4 7.a3=) 7.Nf3 Be7 8.Be2 0-0 9.0-0 c5 (9...cb5 10.Bb5 Nc6 11.Rb1=) 10.Na4 (10.a3 d5=) 10...d5 11.c4 (11.Ne5 Qc7=) 11...Nbd7 (11...dc4 12.Bc4 Nbd7 13.Qc2=) 12.Ne5 dc4 13.Nc4 Nd5 (13...Rc8 14.Bf3 Bf3 15.Qf3+=) 14.d4 (14.e4 Nc7 15.Nab6 Nb6 16.Nb6 Rb8=) 14...cd4 (14...Qc7 15.dc5 bc5 16.Rb1+=) 15.Bd4+= Will b6 fall? 15...Nc5 (15...Rb8!?+=) 16.Ncb6+– Nb6 (16...Na4 17.Na4 (worse 17.Na8 Nac3 18.Qc2 Qa8=+) 17...Rc8 18.Rb1+–) 17.Nc5+– Bc5 (better 17...Bd5!?+–) 18.Bc5 Qd1 (18...Nd5 19.Bf8 Qf8 20.Qd4+–) 19.Rfd1 Na4 (19...Nd5 20.Bf8 Kf8 21.Rac1+–) 20.Bf8 Kf8 21.Rac1 (21.Rac1 Rb8 22.Kf2+–) 1–0. pcmvr – croach, net–chess.com, 2017.

4.c4 Bb7 5.Nf3 cb5 6.cb5 d6 7.Nc3 Nf6 8.Be2 g6 9.a4 Bg7 10.Bb2 Nbd7 11.d4 0-0 12.0-0 Rc8 13.Qb3 Ne4 14.Rac1 Ndf6 15.Bd3 Qd7 16.Rc2 Nc3 17.Rc3 Bf3 18.gf3 Qh3 19.Qd1 Rc3 20.Bc3 Rc8 21.Bd2 Nd5 22.Re1 Nc3 23.Bc3 Rc3 24.Bf1 Qf5 25.Qa1 Qc2 26.Re2 Qc1 27.Re1 Qa1 28.Ra1 d5 29.f4 Bh6 30.Bg2 e6 31.Kf1 f5 32.Ke1 g5 33.fg5 Bg5 34.Kd2 Rc4 35.Ra2? (better is 35.Kd3!? Kf7 36.h3=) 35...Rd4–/+ 36.Kc3 Rc4 37.Kd3 Rg4 38.Bf1 Rc4 39.Kd2 (39.Bg2 Bf6 40.h3–/+) 39...Rc5 40.f4 Bh6 41.Kd3 Bg7 42.Rc2 Rc2 43.Kc2 Kf7 44.Be2 Ke7 45.Kd3 Kd6 46.Bh5 Kc5 47.Bd1 e5 48.fe5 Be5 49.h3 d4 ½–½. combijack (1800) – chesssebas (1690), gameknot.com, 2010.

4.Be2 Nf6 5.Bb2 e6 6.Nf3 Be7 7.0-0 =.

4.Nf3 d5 5.Be2 g6 6.Bb2 Nf6 7.0-0 Bg7 8.c4 0-0 9.Nc3 c5 10.d4 cd4 11.Nd4 e5 ½–½. Neumann,Frank (1650) – Heinrich,Olaf (2290), RSX11E – No Data–1, 2008.

4.Nf3 Nf6 5.Be2 e6 6.Nc3 d5 7.bc6 =.

4.a3 (--> 2.e3 Qb6 3.a3 a5 4.b5).

4.Na3 d5 5.Nf3 Nf6 6.Be2 Nbd7 7.d4 =.

4.a4 cb5 5.ab5 g6 6.Bb2+/- Nf6 7.g4 (7.Nc3 Bg7+/-) 7...Bg7 8.g5 Nh5 9.d4 0-0 (9...h6 10.Nc3 Qd8 11.h4=) 10.c4 d6 (10...Qe6 11.Be2 d5 12.c5+=) 11.Be2 Bf5 12.Bh5 gh5 13.Qh5 (13.Nc3 Rc8 14.Ra4 Nd7=) 13...Bg6 (13...d5!?=) 14.Qd1 Nd7 15.Nd2 Rad8 (15...Qc7 16.Ne2+=) 16.Ne2 Rc8 17.0-0 (17.Bc3 Ra8+/-) 17...e5 (17...Bd3 18.Bc3 Ra8 19.Re1+=) 18.Ng3 (18.Bc3!? Ra8 19.Ra4+/-) 18...ed4 19.ed4 Bd3 20.Qg4 Qd8 (20...Bf1 21.Kf1 Qc7+=) 21.Rfc1+/- d5 22.Ba3 White intends c5 (22.Nf5 dc4 23.Nd6 Rc7 24.N2c4 Nb6+/-) 22...Re8 23.c5 (23.cd5 Rc1 24.Rc1 Nf8+= (24...Bb5? 25.Nde4+-)) 23...Bb5+= 24.h4 (24.Nf5 Be2 25.Qg2 Bd3 26.Ng7 Kg7 27.Qd5 Re2+/-) 24...Bd3 (24...b6 25.Nf5 Be2 26.Qg2 bc5 27.Ng7 Kg7 28.Qd5+=) 25.h5 (25.Rc3!? Ba6 26.Nf5+=) 25...Nf8 26.f4?? (26.h6 Bh8 27.Bb2 Ne6=+) 26...Qd7?? (26...Bd4!? 27.Kh1 Ba1 28.Ra1-+) 27.Qd7?? (27.f5 Re3 28.Bb2 Rce8=) 27...Nd7?? (better 27...Bd4 28.Kg2 Nd7-+) 28.Nf3 Re3 29.Kf2 Rce8?? (29...Rf3!? 30.Kf3 Bd4=) 30.Re1 (better 30.Ne5!? Ne5 31.fe5 (31.Ke3?! Nc4 32.Kd3 Re3 33.Kc2 Rg3+=; 31.de5?! d4+-) 31...R3e5 32.de5 Be5 33.Re1+-) 30...Re1+= 31.Re1 (31.Ne1?? Bd4 32.Kg2 Be4 33.Ne4 Ba1-+ (33...de4?! 34.Rb1-+; 33...Re4?! 34.Rd1-+)) 31...Re1 32.Ne1?? (32.Ke1 f6+=) 32...Bc4?? (32...Bd4 33.Kf3 Bb1 34.Ng2 Bc5 35.Bc5 Nc5 36.Ne3-+) 33.Kf3?? (better 33.Nf3+=) 33...Bd4-+ 34.Nf5 Bg7?? (better 34...Bc5 35.Bc5 Nc5-+) 35.Ne7 (35.Nd6 b5 36.c6 Nb6=+) 35...Kh8-/+ 36.Ng2 Bf8 (36...Bf8 37.Bb2 Bg7=) 0-1. zembelek (2045) - carlos78 (2275), Rated Blitz game, lichess.org, 2015.

4.a4 cb5 5.Bb5 Nc6 6.Na3 Na7 7.Nc4 (7.Nf3 Nb5 8.Nb5 d5+=) 7...Qd8 (7...Qg6 A) 8.Na5? Nb5 (8...Qg2?! 9.Qf3 Qf3 10.Nf3=) 9.ab5 b6–+ (9...Qg2?! 10.Qf3 Qg6 11.d3=+); B) 8.Nf3=) 8.d3 (8.Rb1!?+=) 8...Nb5= 9.ab5 b6 (9...d5 10.Ne5=) 10.Bd2 (10.Nf3 d5 11.Nce5 Qc7=) 10...d5= 11.Ne5 e6 12.Ngf3 Bd6 13.Nc6 Qd7 14.Bc3 Bb7?? (better 14...f6=) 15.Bg7+– Ne7 16.Bh8 Nc6 17.bc6 Bc6 18.Nd4 Ke7 19.Bg7 (19.Nc6 Qc6 20.Bd4 e5+–) 19...Rg8 20.Nc6 Qc6 21.Bd4 Rg2 22.Kf1 (better 22.Qf3 Rg6 23.Kd1+–) 22...e5 (22...Rg6+–) 23.Kg2 ed4 24.ed4 Kf8 (24...Bb4 25.Qe2 Qe6 26.Qe3+–) 25.Qh5 Qd7 (25...Bb4 26.c3 Qc3 27.Qh6 Ke7 28.Rae1 Qe1 29.Re1 Be1 30.Qe3 Kd7 31.Qe1+–) 26.Rae1 Kg8 (26...Be7+–) 27.Rhg1 Bf8 28.Kh1 Kh8 29.Qe5 (29.Qe5 f6 30.Qf6 Qg7 31.Qg7 Bg7 32.Re8 Bf8 33.Rf8) 1–0. FeegLood (2380) – Kabeljaukrieger (2045), lichess.org, 2015.

4.a4 cb5 5.Bb5 Nc6 6.Nf3 Na7 7.Nc3 e6 (7...Nb5 8.Nb5 d5 9.Bb2+=) 8.0-0 Bb4 9.Ba3 (9.Rb1!?+/-) 9...Bc3= 10.dc3 Nb5 11.ab5 Nf6 (11...Qb5 12.Qd6 Kd8 13.Qf8 Kc7 14.Bd6 Kb6 15.Qd8 Kc6 16.Rfd1 Qf1 17.Kf1 b6 18.Qc7 Kb5 19.Rdb1 Ka6 20.Qb6) 12.c4 d5 13.cd5 ed5 (13...Nd5? 14.Nd2 Qc7 15.Ne4+-) 14.Nd4 Be6 15.f4 (15.Qf3 Qc7+=) 15...g6 (15...Bg4 16.Qd3=) 16.Rc1 Ne4 17.Qd3 Rc8 (17...Nc5 18.Bc5 Qc5+=) 18.f5 (better 18.c4!? Qd8 19.Ne6 fe6 20.cd5+-) 18...gf5 19.Nf5 (19.Ra1!?=+) 19...Rc3-/+ 20.Ng7?? (better 20.Nd6 Kd7 21.Ne4 Rd3 22.Nc5 Ke8 23.cd3-/+) 20...Kd7-+ 21.Qe4 (21.Qd4 Qd4 22.ed4 Ra3 23.Ne6 Ke6 24.c4-+) 21...de4 22.Rfd1 Kc8 23.Bd6 (23.Bb2 Qe3 24.Kh1 Bh3-+) 23...Qe3 24.Kh1 Rd8 25.Nh5 (25.Re1 Qf2 26.Ne6 Rd6-+) 25…Rd6 (25...Rd6 26.Rf1 Rd2-+) 0-1. pacalmisu (2180) - carlos78 (2260), Rated Blitz game, lichess.org, 2015.

4.a4 cb5 5.Bb5 Nc6 6.Nf3 Na7 7.c4 Qf6 (7...Nb5!? 8.ab5 d5 9.cd5 Qb5=) 8.Nc3+= Nb5 9.cb5 e5 (9...d6 10.Bb2 Qf5 11.Rc1+=) 10.Bb2 (better 10.Nd5 Qd6 11.e4+–) 10...e4= 11.Nd4 Nh6? (better 11...Qg6 12.0-0 Nf6=) 12.Nd5+– Qg6? (better 12...Qd6 13.Qh5 g6+–) 13.Nc7 Kd8 14.Na8 Qg2 15.Ke2 (better 15.Rf1 Bc5 16.Qh5+–) 15...Ng4 (15...d5 16.Qg1 Bg4 17.Ke1 Qg1 18.Rg1+–) 16.Qf1 (better 16.Qc2 Qf2 17.Kd1 Qg2 18.Qc7 Ke7+–) 16...Ne3 (16...Qf1 17.Raf1 d5+–) 17.de3 Qg4 (17...Qg6 18.Rc1 Qh5 19.Kd2+–) 18.Kd2 (18.f3 Qh5+–) 18...Bb4 19.Kc1 d5 20.Rg1 Qh5 21.Rg7 Bh3 (21...Qh2 22.Qg1 Qg1 23.Rg1+–) 22.Qe2 (22.Qg1 Ke7 23.Rg5 Qh6 24.Re5 Kd7 25.Rd5 Ke7 26.Re5 Kd7+–) 22...Qh6 (22...Qe2 23.Ne2 Ke7 24.Nb6+–) 23.Rf7 Be6 (23...Bd7 24.Qc2 Qh2 25.Rd7 Kd7 26.Nb6 Ke7 27.Nf5 Ke6 28.Bh8 Kf5 29.Qc8 Kg5 30.Qg8 Kf5 31.Qd5 Kg6+–) 24.Ne6 Qe6 25.Rb7 (better 25.Bf6 Be7 26.Be7 Ke8 27.Nc7 Kf7 28.Ne6 Ke7+–) 25...Qc8 (25...Rf8 26.Qc2 Bd2 27.Qd2 Qc8 28.Rc7 Qa8 29.Rh7 Qc8 30.Kb1 Qc2 31.Qc2 Rf7 32.Bf6 Rf6 33.Qc7 Ke8 34.Qe7) 26.Rc7 Qa8 27.b6 Rg8 28.Qb5 Rg1 (28...Qc6 29.Qc6 Rg1 30.Kc2 Rc1 31.Rc1 d4 32.Qd7) 29.Kc2 Ra1 (29...Qc6 30.Qc6 Rc1 31.Rc1 d4 32.Qd7) 30.Qd7 1–0. OnlyPolishOpening (1755) – Dangercheck (1725), lichess.org, 2020.

4.a4 cb5 5.Bb5 Nc6 6.Nf3 Na7 7.Be2 d5+=.

4.a4 cb5 5.Bb5 e6 6.Bb2 f6 7.Nf3 h5 8.0-0 Bd6 (8...h4 9.h3+/–) 9.e4 Kd8 (9...Bf4+–) 10.d4 Qc7 11.c4 g5 12.c5 Be7 13.Nc3 Rh6 (13...h4 14.h3+–) 14.Bc1 Rg6 15.Bd3 Rg7 16.Nb5 Qc6 17.Ng5 (better is 17.Be3 b6 18.d5+–) 17...fg5+/– 18.Qh5 b6? (better is 18...Nf6 19.Qh6 Ne8+–) 19.Qh8 Bf8 20.e5 (20.Bb2 e5 21.Nd6 bc5 22.dc5 Qc5+–) 20...bc5 21.dc5?? (better is 21.Bh7 Bb7 22.f3+–) 21...Bb7= 22.f3 Qc5 23.Be3?? (23.Rf2 d6 24.Bh7+–) 23...Qe3–+ (24.Kh1 Qd3–+) 0–1. Heat – Flip4, Live Game Caissa's Web, 2004.

4.a4 d5 5.Bb2 cb5 6.ab5 (6.Bb5 Bd7+=) 6...Bf5 7.c4 (7.g4 Bg6+/–) 7...dc4 (7...Nf6 8.cd5 Nd5 9.Qf3+=) 8.Bc4 (8.Na3 Nf6+/–) 8...Qg6 (8...Nf6!?+=) 9.Qf3 Nd7 (9...Bb1 10.Qb7 Bf5 11.Be5+–) 10.Ne2 (better is 10.Nc3!? Nc5 11.d4+/–) 10...e5 11.Qb7 Rb8 12.Qf3 (better is 12.Qa7!? Bb1 13.f4+=) 12...Bb1–/+ 13.0-0 (13.Nc3!? Bd3 14.Bd3 Qd3 15.Ra5–+) 13...Bd3–+ 14.Rfc1 Bb4 (14...Ngf6 15.Ng3 (15.Ra5?? Bc4 16.Ra8 Bd5 17.Rb8 Nb8–+) 15...Bb4 16.Bc3–+) 15.Qc6 (15.Nf4 ef4 16.Bd3 Qd3 17.Bg7 Bd2–/+) 15...Bc4–+ 16.Rc4 (16.Qc4 Ne7 17.d4 Qe6–+) 16...Ne7 17.Qc7? (17.Qg6 Ng6 18.d4 Rb5 19.Rc8 Ke7 20.Rh8 Nh8 21.de5 Ne5–+) 17...Nd5 (better is 17...Bd6!? 18.Qa5 Qd3 19.Rg4 Qe2 20.Rg7 Qb5 21.Qb5 Rb5 22.Bc3–+) 18.Qb8? (18.Qc6 Qd3 19.Be5–+) 18...Nb8 19.Rc8 Ke7 20.Rh8 Nd7 21.Nc3 N5b6 22.h3 (22.e4–+) 22...Qd3 (22...Qc2 23.Bc1 Bc3 24.dc3 Qc3 25.Rb1–+) 23.Nb1 (23.Bc1 Bc3 24.dc3 Qc3–+) 23...h6 (better is 23...Nc5 24.Kh2–+) 24.Rg8 (24.Kh2–+) 24...Qh7 0–1. Raue,Thorsten (1840) – Sparwel,Oliver (1935), Verbandsliga Muensterland, 2010.

4.a4 d5 5.Bb2 f6 6.Qh5 g6 7.Qh4 Bg7 8.Bd3 Kf7 (8...Nh6!?=) 9.Nf3 Bd7 10.bc6?? (10.Nc3 e5+=) 10...Bc6?? (better 10...Qb2 11.cb7 Ra7–+) 11.Bd4+= Qc7 12.0-0 (12.e4 e5 13.Bb2 Qb6+=) 12...Nd7?? (better 12...e5!?–/+) 13.Ne1 Ne5 14.Nc3 Nh6 (14...Nd3 15.Nd3 e5 16.Bc5=) 15.Be5+= Qe5 16.Nf3 Qe6 17.Qf4 Nf5? (better 17...Qc8!?+=) 18.g4+– Bh6 (18...Qd6 19.gf5 Qf4 20.fg6 hg6 21.ef4+–) 19.gf5 gf5?? (19...Qf5 20.Qg3 Qd7+–) 20.Qh6 Rhg8 21.Kh1 d4 22.Qh5 Kf8 23.ed4 (23.ed4 Rg5 24.Qh3+–) 1–0. b4_Bb2 (1690) – Dementius (1735), lichess.org, 2020.

4.a4 d5 5.c4 e5 6.Bb2 cb5 (6...Nd7 7.d4 dc4 8.Bc4 cb5 9.Bb5+=) 7.ab5 (7.cd5 Bd6 8.Nf3 ba4 9.Be5 Be5 10.Ne5 Nf6+–) 7...Nd7 8.Nf3 (8.cd5 Ngf6=) 8...Bd6 (8...e4 9.Nd4 dc4 10.Bc4=) 9.Qc2 (9.d4 dc4 10.Bc4 Qc7+=) 9...e4?? (better 9...Qc7=) 10.Bg7+– (10.Bg7 ef3 11.Bh8 fg2 12.Bg2 dc4 13.Qc4+–) 1–0. Markzela (1730) – Tea_Rex_64 (1800), lichess.org, 2020.

4.a4 d6 5.Nf3 Bd7 6.c4 d5 7.Bb2 dc4 8.Bc4 e6 9.0-0 cb5 10.ab5 Bb5?? (better is 10...Nf6 11.Qa4 Be7+/–) 11.Bb5 (better is 11.Qb3+–) 11...Qb5= 12.Bc3 a4 13.d4 (13.Be5!?=) 13...a3 14.Qc1 a2 15.Nbd2 Ba3 (better is 15...Ne7–/+) 16.Qc2+= Bb4?? (16...Bd6 17.d5 f6 (17...Qd5?? 18.Bg7 Nc6 19.Bh8+–) 18.Bf6 Bh2 (18...Qd5 19.Bg7 Ne7 20.Bh8+–) 19.Kh2 gf6 20.Qc8 Ke7+–) 17.Bb4+– Qb4 (17...Nc6 18.Bc5 Qa4+–) 18.Ra2 (18.Qc8 Ke7 19.Rfc1+–) 18...Ra2+/– 19.Qa2 Nd7 (better is 19...Nf6+–) 20.Qb3?? (20.Ne4 Kf8 21.Rb1+–) 20...Qb3+= 21.Nb3 Ngf6 22.Ra1 Ke7 23.g3 Rc8 24.Nbd2 h6 25.Ra7 b5 26.Rb7 Rb8 27.Rb8 Nb8 28.Nb3 b4 29.Ne5 Ne4 30.Kf1 f6 31.Nd3 Nc6 32.Ke2 Nc3 33.Kd2 Ne4 (33...Kd6 34.Nb4 Ne4 35.Kd3 Nf2 36.Ke2 Nb4 37.Kf2=) 34.Ke2 (34.Kc2 g5+=) 34...Nc3 35.Kd2 Ne4 (35...Kd6 36.Nbc5 e5 37.Nb4 Nb1 38.Kc2 Nb4 39.Kb1 ed4 40.ed4=) 36.Ke2 Nc3 ½–½. Valpa – Footyhead, playchess.de, 2004.

4.a4 e5 5.Bb2 d6 6.d4 e4 7.d5 =.

4.a4 e6 5.Bb2 d5 6.c4 (6.Nf3 Nf6=) 6...dc4 (6...Nf6 7.Bf6 gf6 8.cd5 cd5 9.Nc3=) 7.Bc4 Nd7 (7...cb5 8.ab5 Nf6 9.Bf6 gf6 10.Nf3+=) 8.bc6 (8.Nf3 Ngf6=) 8...Qc6 (8...Qb2 9.cd7 Bd7 10.Nc3=) 9.Bf1+= Ngf6 10.Nf3 Be7 11.Bb5 Qc7 (11...Qe4 12.d3 Qg4 13.0-0+=) 12.Be5+= Qd8 13.Qc2 0-0 (13...Bb4 14.Bc7 Qe7 15.0-0+=) 14.Bc7 Qe8 15.Na3 (15.Nc3 Bd8 16.Bf4 Qe7+=) 15...Nd5= 16.Be5 (16.0-0 Nc7 17.Qc7 Qd8=) 16...Qd8 (16...f6 17.Bg3=) 17.0-0 (17.Bd4 Nb4 18.Qb2 f6=) 17...Ne5=+ 18.Ne5 Bf6 (18...f6!? 19.Nf3 Bd7=) 19.Nac4 Qc7 (19...Be7 20.d4=) 20.Qe4+= b6 (20...Be7 21.Rac1+=) 21.Rac1+/– Be5 22.Ne5 Qe7 (22...Qd8 23.d4+/–) 23.Bc6 Bb7 (23...Nf6!? 24.Qf3 Rb8+/–) 24.Nd7+– Bc6 25.Nf8 Rf8 (25...f5!? 26.Qe6 Qe6 27.Ne6 Ba4+/–) 26.Rc6+– Qd7 27.Rfc1 (27.Qc4 e5+–) 27...g6? (better is 27...Nb4 28.Rb6 Qd2+–) 28.Qd4 (28...Rd8 29.d3+–; 28.d4 Rb8+–) 1–0. Spiegel,Matthias – Wegener,Lutz, Landesliga Ost2, 2002.

4.a4 Nf6 5.Bb2 =.

4.a4 Nf6 5.Nf3 d6 6.d4 =.

4.a4 Nf6 5.Nf3 g6 6.d4+= Bg7 7.Nbd2 (7.Bd3 d5+=) 7...0-0 8.c4 d6 9.Bb2 (9.Bd3 c5+=) 9...Bf5 (9...Bg4 10.Be2=) 10.Be2 cb5 11.ab5 Rc8 12.0-0 Nbd7 (12...Na6 13.Nh4 Nb4 14.Nf5 gf5 15.Ba3+/–) 13.Nh4+/– Be6 14.f4 (14.d5 Bf5 15.Nf5 gf5+/–) 14...Nf8 (14...Nb8 15.f5 Bd7 16.fg6 hg6 17.Qb3+/–) 15.g4 White plans f5 (15.f5 Bd7+=) 15...h6 16.f5 Bd7 17.fg6 (17.Qa4 e5+=) 17...fg6 18.h3 e5 (18...d5 19.Nhf3+=) 19.Bd3 h5 (19...d5 A) < 20.de5 Qe3 21.Kg2 A1) 21...Qd3? 22.Rf3 (22.ef6 Bf6 23.Rf3 Qf3 24.Qf3 Bb2+/–) 22...Qf3 23.Ndf3+– (23.Kf3?! Ne4+/–; 23.Nhf3?! Ne8+–); A2) 21...Nh5=; B) 20.Bg6 dc4 (< 20...Ng6 21.Ng6 Rd8 22.Ne5+/–) 21.de5 B1) 21...Ng6 22.Bd4 Qb5 23.Ng6+= (< 23.ef6 Nh4 24.Qe1 Ng6 25.fg7 a4=); B2) 21...Qe3 22.Rf2 c3 (22...Qh3 23.ef6 Qg3 24.Rg2 Qh4 25.Nf3 Qf6 26.Bf6 Bf6 27.Rb1+–; 22...Ng6 23.Ng6 Qg3 24.Rg2 Qe3 25.Kh2=) 23.Bc3 Ng4 (23...Qc3?! 24.ef6 Qg3 25.Ng2+=; 23...Rc3 24.ef6 Ng6 25.Nf1=; 23...Ng6?! 24.Ng6 Qg3 25.Rg2 Qc3 26.Ne7 Kh8 27.ef6 Bf6 28.Nc8–/+) 24.hg4 Qg3 (24...Ng6 25.Ng6 Rc3 26.Ne7 Kh8 27.Nf1+–) 25.Ng2 Qc3 (< 25...Rc3 26.Ne4 Qe5 27.Nc3 Qc3 28.Qd5 Kh8 29.Ra4+=) 26.Bf7 Kh8–+; C) 20.c5 Qd8 C1) 21.de5 Ng4 22.Rf8 Bf8–/+ (< 22...Qf8 23.hg4 Qc5 24.Bd4+/–); C2) 21.Ng2=) 20.g5= Bh3? (20...N6h7 21.Qb3 Qd8=+) 21.Qf3?? (better is 21.gf6 Bf1 22.Qf1+– (22.Nf1?! Bf6 23.Ng6 Ng6+/–)) 21...Bf1–/+ 22.Rf1 e4 23.Ne4 Ne4 24.Qf7 Kh7 25.Ng6! (25.Be4?! Qd8 26.Bg6 Kh8+=) 25...d5 (25...Ng6 26.c5) 26.Be4 de4 (26...Qg6 27.Bg6 Ng6 28.Rf6+–) 27.Ne7 (27...Ng6 28.Rf6 Ne7 29.Rb6+–) 1–0. Yalcin,Umit – Grobler,David, corr or01–018 E–mail, 2002.

4.Bb2 Nf6 5.Na3 d5 6.Rb1 c5 7.c4 e6 8.Nf3 Nbd7 9.Be2 Be7 10.0-0 0-0 11.d4 Ne4 12.dc5 Bc5 13.cd5 Ba3 14.Ba3 Nc3 15.Qc2 Nb1 16.Bf8 Nf8 17.de6 Be6 18.Qb1 Rc8 19.Nd4 Bc4 20.Rc1 Ba2 21.Qa1 Rc1 22.Qc1 Bd5 23.Qc3 Qg6 24.f3 Qb1 25.Kf2 a4 26.e4 Be6 27.Ne6 fe6 28.Bc4 Kf7 29.Kg3 Qd1 30.f4 Qh5 31.Qb4 Qg6 32.Kf3 Qh5 33.Kg3 g5 34.Qd6 Qh4 35.Kf3 Qf4 36.Qf4 gf4 37.Kf4 Kf6 38.e5 Kf7 39.Ke4 Nd7 40.Kd4 Nb6 41.Bd3 a3 42.Bb1 Nd5 43.Kc4 h5 44.Kb3 b6 45.g3 Ne3 46.Bd3 Ng4 47.Be2 Kg6 48.Bd3 Kh6 49.Bc4 Nh2 50.Be6 Nf3 51.Ka3 Ne5 52.Kb3 ½–½. Harding,Timothy David – Stolle,Erhard, corr EU/M73, 1989.

4.Nc3+= a4 5.Rb1 Qa5 6.Nf3+/– e6 7.Bb2 Nf6 8.Qe2 (8.bc6 dc6 9.Bd3 Bd6=) 8...Be7 9.a3 0-0 10.Qd1 (10.e4 d6=) 10...b6 (10...d5 11.bc6 bc6 12.Be2=) 11.Be2 Ne8 12.0-0 Nc7 13.Bc1 (13.bc6 dc6 14.Ne4 Nd7+=) 13...Bb7 (13...d5 14.bc6 Nc6 15.Nb5 Nb5 16.Bb5=) 14.Ne5+= Qa7 15.d4 f6 16.bc6 dc6 17.Nf3 Rd8 18.Qd2 c5 19.Rd1 cd4 (19...Nd7 20.e4=) 20.ed4+= (20.Nd4? e5–+) 20...Nd7 21.Qe3 Ne8?? (better is 21...Nf8+=) 22.Qe6 (22...Kh8 23.Nb5+–; 22.Nb5 Qb8 23.Qe6 Kh8 24.Qe7 Bd5+–) 1–0. Beutel,Heinrich – Jakobi,Axel, corr, 2000.

4.Nc3+= a4 5.Rb1 c5 6.Nd5 Qd6 7.e4 +=.

4.Nc3 a4 5.Nf3 (5.Rb1 c5+=) 5...d5 (5...Nf6 6.Rb1+=) 6.bc6 bc6 7.Rb1 Qc7 8.d4 Ba6 (8...Nf6 9.Bd3+=) 9.Ba6 (9.Bd3 e6+/–) 9...Ra6 10.e4 Rb6 (10...Nf6 11.Qe2 Rb6 12.Rb6 Qb6 13.0-0+=) 11.Rb6 (11.Bf4 Qd8+/–) 11...Qb6 12.0-0 (12.Na4 Qa5 13.c3 e6+/–) 12...e6 13.Bf4 Nd7 (13...Qa5 14.Qd3 Na6 15.Rb1+/–) 14.ed5 cd5 15.Na4 Qa7 (15...Qa5 16.c3+=) 16.c3 (16.c4 dc4 17.Qc2 Ne7 18.Qc4 Nd5+/–) 16...Be7 (16...Ngf6 17.Qb3+=) 17.Re1 (17.Qb3 Ngf6+=) 17...Ngf6+= 18.Qb3 (18.Ne5 Ne5 19.de5 Nd7+=) 18...0-0 19.Nb2 Rb8?? (better is 19...Nh5 20.Nd3 Ra8=) 20.Bb8+– Qb8 (20...Nb8 21.Ne5+–) 21.Qb8 Nb8 22.c4 Bb4 (22...dc4 23.Rc1+–) 23.Rb1 (23.Rc1 dc4 24.Rc4 Bf8+–) 23...Nc6 (23...dc4 24.Nc4 Na6 25.a3+–) 24.Nd3 (24.Nd3 Bf8 25.c5+–) 1–0. marus1 – Slasker2, internet, 2001.

4.Nc3 e5 5.Rb1 +=.

4.Nc3+= e5 5.Nf3 Qc7 6.bc6 dc6 7.d4 =.

4.Nc3 Nf6 5.Rb1 Qc7 6.Nf3 d5 7.bc6 =.

4.Nc3 Nf6 5.Nf3 g6 6.a4 (6.Rb1 Qd8+–) 6...Bg7+= 7.Rb1 0-0 8.bc6 Qc6 9.h3 d5 10.Ba3 Qd7 11.Bb5 (11.Rb5 Re8+=) 11...Nc6= 12.0-0 Re8 13.d4 Qc7 14.Qd2 Bd7 15.Bc5 Rab8 16.Bd3 Qc8 (16...b6 17.Ba3+=) 17.Rfe1 e5 18.Nb5?? (better 18.Bb5 e4 19.Ne5+=) 18...e4–/+ 19.Nd6 Qc7 20.Ne8 Re8 21.Bb6 Qc8 22.Ng5 ed3 23.cd3 h6 24.Nf3 Bh3 (better 24...Bf8!? 25.Rec1 Ba3–/+) 25.gh3= Qh3 26.Nh2 Ng4 (26...Bf8 27.Rec1–/+) 27.Nf1 (27.Ng4!? Qg4 28.Kf1 Qh3 29.Kg1=+) 27...Bf6=+ 28.Bc5 Bh4 29.Re2 Qf3 Will f2 fall? (29...Nd8 30.f4=+ (30.Qa5? Ne6 31.Qb5 Ng5 32.Qe8 Kh7 33.Qf7 Nf7–+)) 30.Rb7= Nd8 31.Rb8 Kg7 32.Bb6?? (better 32.Bd6 Re6 33.Bg3=) 32...Ne6–+ 33.Nh2 (33.Re8 Ng5 34.Rg8 Kg8 35.Ng3 Bg3 36.e4 Nh3 37.Kf1 Qh1) 33...Nh2 34.Bc7 (34.Re8?? Qh3 35.Rg8 Kg8 36.Qa5 Nf3) 34...Nc7 (34...Qh3 35.Be5 Kh7 36.Bh2 Ng5 37.f4 Nf3 38.Kh1 Qf1 39.Bg1 Qg1) 35.Kh2 (35.Qd1 Rb8 36.Rd2 Qh3 37.Qe2 Nf3 38.Qf3 Qf3 39.Rb2 Rb2 40.Kh2 Bf2 41.e4 Bd4) 35…Rb8 (35...Rb8 36.Qe1 Ne6 37.Rd2 Ng5 38.Qf1 Bg3 39.Kg1 Nh3 40.Qh3 Bf2 41.Kh2 Bg1 42.Kg1 Rb1 43.Rd1 Rd1 44.Qf1 Rf1 45.Kh2 Rh1) 0–1. Silent Move (2115) – Academus (1705), redhotpawn.com, 2012.

4.Nc3 g6 5.Rb1 (5.Bb2 Nf6+/–) 5...Qc7 6.Nf3 (6.Bb2 e5+/–) 6...Bg7 7.d4 (7.Bb2 Nf6+=) 7...Nf6 8.Bd3 (8.e4 d6+=) 8...0-0 (8...d5 9.e4+=) 9.0-0 (9.e4 d6+=) 9...d5 10.Ba3 Re8 11.Ne5 Nbd7 12.f4 Ne5 (12...a4 13.bc6 bc6 14.Qf3+=) 13.fe5+/– Ng4 14.Qf3 The mate threat is Qxf7 14...Rf8 15.Na4 Nh6 (15...Bh6 16.b6 Qd8 17.Bc1+/–) 16.bc6 (16.b6 Qd8 17.Nc5 Nf5+/–) 16...bc6 17.Nb6 Rb8 18.Nc8 Rbc8 (18...Rfc8 19.Bc5+/–) 19.Bc5 Rb8 (19...f6 20.e6+/–) 20.c4 (20.Rb8 Rb8 21.c4 Qd7+/–) 20...Qd7 21.e4 (21.Rb8 Rb8 22.e4 f6 23.ed5 cd5 24.ef6 ef6 25.cd5 Nf7+/–) 21...de4 (21...Rb1 22.Rb1 f6 23.ed5 cd5 24.Qd5 Qd5 25.cd5 fe5 26.Be7 Rf4 27.Rb8 Kf7+–) 22.Be4+– Rbc8 (22...Rb1 23.Rb1 (23.Bb1?! f6+=) 23...Qe6 24.Bc6 Qc4 25.Qb3 Qb3 26.Rb3+– (26.ab3?! Rc8 27.Bb7 Rb8+/–)) 23.Rb6 Qe6 (23...Rfd8 24.Bc6 Qc7 25.Bd5 Be5 26.Rb7 (worse is 26.de5 Qc5 27.Qf2 Qf2 28.Rf2 e6+=; 26.Bf7 Kg7 27.Rb7 Bh2 28.Kh1 Rf8+–) 26...Bh2 27.Kh1+–) 24.Bd5! Qf5 (24...Qd5 25.cd5) 25.Bc6 Qf3 26.gf3 (26.Bf3?! Be5 27.Rb5 Bd6+/–) 26...Nf5 (26...Rfd8 27.f4+–) 27.f4 Ne3 28.Be7 (28.Rc1 Nf5+–) 28...Nf1 29.Bf8 (better is 29.Kf1 Rb8 30.Rb5 (30.Bf8 Rb6 31.Bg7 Rc6–/+) 30...Rb5 31.cb5+–) 29...Bf8? (29...Ne3 30.Bg7 Nc4 31.Rb5 Kg7 32.Rc5+–) 30.Kf1 Bb4 (30...Bh6 31.Bd5 Bf4 32.Rf6+–) 31.Ke2 Kf8 (31...h6 32.d5+–) 32.Kd3 Ke7 (32...Rd8 33.d5+–) 33.Rb7 Kf8 (33...Kd8 34.Rd7 Ke8 35.d5+–) 34.Bd7 Rd8 35.c5 Ke7 (35...a4 36.c6 Ba5 37.a3+–) 36.c6 f6 (36...Bd6 37.Bh3 Ke8 38.ed6 Rd6 39.c7+–) 37.Bh3 (37.Bh3 Ke8 38.c7+–; 37.d5 fe5 38.fe5 h5 39.Be6 Ke8+–) 1–0. AGove – kehrsam, ChessWorld.net, 2007.

4.Nc3 g6 5.Bb2+/– Bg7?? (better is 5...f6+/–) 6.Na4+– Qc7 (6...Qb5 7.Bb5 Bb2 8.Be2 Ba1 9.Qa1+–) 7.Bg7 cb5 8.Bb5 f6 9.Bh8 Qe5 (9...Nh6 10.Bg7 Nf5 11.Bh8+–) 10.Nb6 Qb5 11.Na8 Qc6 (11...Na6 12.Qf3+–) 12.Qf3 Qc2 (12...d6 13.Qc6 Nc6 14.Rb1+–) 13.Qd5 e6 14.Qd6 (14.Qa5 Qb2 15.Rd1 Nc6+–) 14...Na6 (14...Qb2 15.Rd1 Nc6 16.Nf3+–) 15.Bg7 (15.Nb6 Qb2 16.Bg7 Qa1 17.Ke2 Kd8+–) 15...Ne7 (15...Qc5 16.Qc5 Nc5 17.Nb6+–) 16.Bf6 Nf5 17.Qb6 Kf7 18.Qd8 Nb4 19.Nf3 Nd3 20.Ke2 (20.Ke2 h6 21.Nc7+–) 1–0. Woelfelschneider,Peter – Anders, 2009.

4.c4 cb5 5.cb5 d5 6.Nc3 d4 7.Na4 Qe6 (7...Qg6 8.ed4 Bg4 9.Ne2+=) 8.Nf3+/- Qd6 9.Bb2 Nd7 10.Nd4 Nb6 (10...e5 11.Nf3+/-) 11.Nf3 Na4 12.Qa4 Nf6 13.Ba3 Qd8 14.Rc1 e6 (14...Bf5 15.Ne5 b6 16.Qc4+-) 15.Bf8 Kf8 16.Qf4 Bd7 17.Be2 Nd5 18.Qd4 Be8 19.0-0 b6 20.a4 h5 21.Rc4 Nb4 22.Qe5 Rh6 23.h4 (23.d4 f6 24.Qg3 Bf7+-) 23...Qd5 (23...f6 24.Qc3+-) 24.Qc7 Qd8 25.Rfc1 Nd5 26.Qe5 Kg8 27.Ng5 Qf6 (27...Nb4 28.d4+-) 28.Qd6 (28.Qf6 Nf6 (28...Rf6?? 29.Rc8 Rc8 30.Rc8+-) 29.Bf3 Rd8+-) 28...Qe7 29.Qe7 Ne7 30.d4 Nd5 31.Rc8 Rc8 32.Rc8 (32.Rc8 Kf8 33.e4+-) 1-0. ahn89 (2235) - marekt (2215), gameknot.com, 2021.

4.c4 cb5 5.cb5 d5 6.Nc3 Bf5 7.Nd5+– Qd6 (7...Qd8 8.Qf3 e6 9.Nc3+–) 8.Qf3 (8.Bc4 e6 9.Ba3 Qd8 10.Bf8 Kf8+–) 8...e6 9.Nf4 (9.Nc3 Qd7+–) 9...Qb6 (9...Qd7 10.Bb2+–) 10.g4 Bg6 11.Bb2 Nf6 (11...Nd7 12.Ng6 hg6 13.Rc1+–) 12.Bd4 Qc7 13.Bf6 gf6 14.Bg2 Nd7 (14...Ra7 15.Nd5! Qe5 16.Qf6 (16.Nf6?! Kd8 17.Rc1 Qb5+–) 16...Qf6 17.Nf6 Ke7 18.Ne4+–) 15.Qb7 Qb7 16.Bb7 Rb8 17.Bc6 Bd6 18.Ng6 (18.d4 Ke7+–) 18...fg6 19.Nf3 Ke7 20.Ke2 (20.d4 Rhc8+–) 20...Ne5 (20...Rb6 21.Rac1+–) 21.Ne5 Be5 22.Rag1 (22.d4 Bd6+–) 22...Rhd8 (22...Bd6 23.a4+–) 23.h4 White intends g5 (better 23.d4 Bd6 24.a4+–) 23...Rd6 (23...Bd6 24.h5 g5 25.d4+–) 24.d4 Rc6 25.bc6 (25.de5?! Rb5 26.Rc1 Rc1 27.Rc1 Re5 28.Rc7 Kf8 29.Rh7 Re4+–) 25...Rb2 26.Kf3 Bc7 27.g5 f5 (27...Rc2 28.h5 fg5 29.hg6 hg6 30.Rg5 Rc6 31.Rg6+–) 28.Rc1 (28.h5 Rc2 29.Rc1 Rc1 30.Rc1 Kd6+–) 28...Ra2 29.h5 1–0. pcmvr – klescev, net–chess.com, 2017.

4.c4 cb5 5.cb5 d5 6.Nc3 Nf6!?=.

4.c4 cb5 5.cb5 e6 6.Bb2 d5 7.Nf3 Nd7 8.Be2 Ngf6 9.0-0 Bd6 10.Nc3 0-0 11.Rc1 e5 12.Qb3 Nc5 13.Qc2 Bg4 (13...e4 14.d4 ef3 15.dc5 Bh2 16.Kh1 fg2 17.Kg2=) 14.Na4 (14.d4 ed4 15.Na4 Na4 16.Bd4 Nc5 17.Bc5 Bc5 18.Qc5 Qc5 19.Rc5 Rfc8+=) 14...Na4= 15.Qa4 Ne4 (15...Rfe8 16.d3=) 16.Rfd1 (16.d4 Nd2 17.de5 Bf3 18.Bf3 Bc5+=) 16...Rac8 (16...Bf3 17.gf3 Nc5 18.Qc2=) 17.d3 (17.d4 ed4 18.Bd4 Bc5+=) 17...Rc1 18.Rc1 Nc5?? (better 18...Nf6=) 19.Qg4+- (19.Qg4 Qb5 20.Be5 Be5 21.Ne5+-) 1-0. Gimeno Higueras,R (2215) - Sanchez Corujo,J (2210), Online Chess Stars GpB, 2020.

4.c4 c5 5.Bb2 f6? (5...Nf6!?+–) 6.Bd3 (6.Nc3 e6+–) 6...d6 (6...Nc6 7.bc6 Qb2 8.Nc3+–) 7.Qh5 Kd8 8.Nc3 e6 9.Nge2 (9.Nf3 Ne7+–) 9...Nd7 10.f4 (10.Bh7?! Ne7 11.Na4 Qc7+–) 10...Nh6 11.0-0 Be7 12.Na4 Qc7 13.Rac1 b6 (13...Nb6 14.Nb6 Qb6 15.e4+–) 14.Be4 Bb7 15.Qf3 (15.Bc2 Re8+–) 15...Rb8 (15...Ra7 16.Bb7 Qb7 17.Qh3+–) 16.Bc6 Rf8 (16...Ke8 17.f5! Nf5 18.Nf4 Bc6 19.bc6+– (19.Qc6?! Qc6 20.bc6 Nf8+=)) 17.d4 Bc6? (17...f5+–) 18.bc6 (18.Qc6?! Qb7+–) 18...e5 (18...Nf5 19.Nac3 cd4 20.Nd4 (20.cd7?! dc3 21.Bc3 Kd7+=) 20...Nd4 21.ed4+–) 19.cd7 (better 19.de5 Ne5 20.fe5 fe5+–) 19...Kd7 (19...Qb7 20.Qg3 (worse 20.fe5 Qf3 21.gf3 fe5+–) 20...Nf5 21.Qh3 Qd7 22.fe5 fe5 23.de5 Qa4 24.Rf5 Rf5 25.Qf5+–) 20.Nac3 Qb7 (20...ed4 21.ed4 Kc8 22.Nd5+–) 21.Qh3 Kd8 (21...Ke8 22.de5 de5 23.fe5+–) 22.de5 fe5 23.fe5 de5 (23...Rf1 24.Rf1 de5 25.Qh5+–) 24.Nd5 (better 24.Rcd1 Ke8 25.Nd5 Rd8 26.Qh5 Rf7 27.Qe5 Rd5 28.cd5 Qd7+–) 24...Qd7 25.Rf8 (25.Rf8 Bf8 26.Qh5+–) 1–0. DEFFM – GuestNXYK, freechess.org, 2019.

4.bc6 dc6 5.d4 (5.Nc3 Nf6=) 5...Nf6 6.Nd2 Bf5 (6...e6 7.Bd3+=) 7.Ba3 (7.Rb1 Qc7+=) 7...Nbd7 (7...Na6 8.f3=) 8.Ngf3 e6 (8...Qc7 9.Be2+=) 9.Bf8+= Nf8 10.Ne5 (10.Rb1 Qc7+=) 10...Ng6 11.Rb1 Qc7 12.g4 Ne5 13.gf5 Ned7 14.fe6 fe6 15.Bc4 (15.Qf3 e5+=) 15...Ke7 (15...e5 16.c3=) 16.Qf3 b5 17.Bd3 Raf8 (17...e5 18.Qg3 Kd8 19.Qg7+=) 18.c4 (18.Qg2 Rhg8+/–) 18...b4+= 19.c5 (19.Qg2 g6+=) 19...e5 20.Qg3 Kd8 21.Nc4 ed4 22.ed4 Nd5 23.Nd6 Nc3 (23...N7f6 24.0-0=) 24.Rb2+= Na4 (24...Nf6 25.0-0+=) 25.Re2 Nc3 26.Re6 Nd5 (26...Nf6 27.Ba6 Nfd5 28.Qg5 Ne7 29.Qg7+–) 27.0-0 (27.Ba6 Rf6 28.Qg4 a4+–) 27...a4 28.Rfe1 (28.Qg7? Rhg8 29.Nf7 Kc8 30.Nd6 Kb8–+) 28...N7f6 (28...g6 29.Ba6 N7f6 30.Nb7 Kc8 31.Na5 Kb8 32.Nc6 Ka8 33.Qf3+–) 29.Qe5 (29.Ba6 b3+–) 29...b3 (better is 29...h6!?+=) 30.Bf5 ba2 31.Nb7! Kc8 (31...Qb7 32.Rd6) 32.Rc6 Kb7 33.Rc7 (33...Nc7 34.c6 Kb8 35.d5+–) 1–0. Bendig,Frank – Grobler,David, corr or01–018 E–mail, 2002.

4.bc6 Nc6 5.Nc3 e5 6.Rb1 Qd8 7.Nd5 =.

4.Bb2 b6 5.Nf3 d6 6.Bd3 Ra7 7.c4 e5 8.0-0 f5 9.e4 (9.Be2 Be7+=) 9...f4 (9...fe4 10.Be4 Be7 11.Qc2=) 10.Nc3 Nf6 11.Be2 h5 (11...Be7 12.Qc2+=) 12.Re1 h4 13.h3 Bb7 (13...Be7 14.Kh2+/–) 14.Ng5 Qe7 (better is 14...Bc8!?+/–) 15.Nd5+– Nd5 (15...Bd5 16.ed5 g6 17.Bd3+–) 16.Bh5 Kd7 (16...Kd8 17.Nf7 Kc8 18.cd5 Rh5 19.Qh5+–) 17.Qg4 Kc7 18.Ne6 (18.cd5?! Nd7 19.Bg6 Nf6 20.Ne6 Kb8+/–; 18.ed5?! Nd7 19.Ne6 Kb8+/–) 18...Kc8 (18...Qe6 19.Qe6 Nf6 20.Qf7 Nbd7 21.Bg6+–) 19.Nf8 (19.ed5?! Nd7 20.Nf4 Rh6+–; 19.cd5?! Nd7 20.Bg6 Nf6+/–) 19...Nd7 20.Ng6 (20.cd5?! Rf8 21.Rac1 f3+=; 20.ed5?! Rf8 21.d4 cd4 22.Bd4 Qd8+/–) 20...Qf7 (20...Qd8 21.Nh8 N5f6+–) 21.Nh8 g6 (21...Qg8 22.Ng6 N5f6 23.Ne7 Kc7 24.Ng8 Ng4 25.Bg4 Kd8+–) 22.Nf7 (22…N5f6 23.Qg6+–) 1–0. lucya (2125) – desda12, GameColony.com, 2002.

4.d4 cd4 5.ed4 (5.Qd4 Nf6+=) 5...d5 (5...e6 6.Bd3+=) 6.Bd3 e6 7.Nf3 Nf6 (7...Nd7 8.Nbd2+=) 8.0-0 Nbd7 9.Nbd2 (9.Re1 Qc7+=) 9...Bd6 (9...Bb4 10.c4 b6 11.cd5 Nd5 12.Nc4+=) 10.c4+– b6 11.cd5 Nd5 12.Nc4 Bc7 (12...Be7 13.Nfe5 Ne5 14.de5+–) 13.Nfe5 (13.Ba3 Bb7 14.Bd6 Nb4+–) 13...Qh4 (13...Qf6 14.Re1 0-0 15.Ba3+–) 14.Ba3 (14.g3 Qd4 15.Bb2 Qc5 16.Nf7 Kf7+–) 14...Qd4 15.Nc6 Qf4? (better 15...Qf6!?+–) 16.Bd6+– Bd6 17.g3 Qf6 18.Nd6 Kf8 19.Re1 Nc5 20.Bc4 Bd7 (20...Nb7 21.Ne4 Nc3 22.Nc3 (22.Nf6?! Nd1 23.Nh7 Rh7 24.Rad1 a4+–) 22...Qc3 23.Rc1+–) 21.Ne5 (21.Bd5?! ed5 22.Qd5 Be6+–) 21...Be8 22.Bd5 ed5 23.Qd5 Rd8 24.Rad1 Qe6 (24...h5 25.Nec4 Ne6 26.h4+–) 25.Qf3 Rd6 (25...Qf6 26.Qe2 Qe6 (26...Rd6?? 27.Ng6 hg6 28.Qe8) 27.Ne8 Re8+–) 26.Rd6 Qd6 (26...Qe7 27.Nd7!! Nd7+–) 27.Nf7! (27.Nf7 Qe6 28.Re6 Ne6 29.Nh8 Ke7 30.Qb7 Bd7 31.Qb6+–) 1–0. Woelfelschneider,Peter – Molano, 2010.

4.d4 e6 5.Nf3+=.

4.Be2 Nf6+=.

(--> 1.b4 c6 2.e3 a5 3.b5 d5).

4.Bb2 e6 5.a4 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 a5).

4.Nc3 Nf6 5.Bb2 e5 6.d4 Nbd7 7.de5 =.

4.c4 e5 5.Bb2 Nd7 6.Qc2 Ngf6 7.Nf3 Be7 8.Nc3 c5 9.Be2 Nb6 10.a4 Be6 11.Ne4 1–0. combijack (1840) – ultradaddy (1695), gameknot.com, 2013.

4.d4 Bf5 5.Nf3 Nf6 6.Bd3 Bd3 7.Qd3 =.

4.d4 Nf6 5.Nf3 Bf5 6.Bd3 Bd3 7.Qd3 Nbd7 8.bc6 bc6 9.e4 e5 10.0-0 Rb8 11.Nbd2 ed4 (11...Be7 12.Rd1=) 12.Nd4+= Ne5 (12...Qc7 13.Qc3+=) 13.Qe2 (13.Qc3 c5 14.N4f3 Nf3 15.Qf3 Be7+=) 13...c5 (13...Qc7 14.f4 Ned7 15.Nc4+/–) 14.Nb5+= Be7 15.Rd1 0-0 16.a4 Re8 (16...Qb6 17.Bb2+=) 17.c4 Qb6 18.Rb1 Qc6 19.f3 (19.Bb2 Nfd7+=) 19...Bd8 (19...Nfd7 20.Nb3+=) 20.Nf1 (20.Nb3 Re6+/–) 20...Bc7+= 21.Ne3 Nfd7 (21...Rb7 22.Nf5 g6 23.Bg5 gf5 24.Bf6+/–) 22.Bd2 (22.Nd5 Bd8+/–) 22...Nf8 (22...Nf6 23.Nf5+/–) 23.Bc3 (23.Nd5 Bd8+/–) 23...Ne6 24.Nd5 Bd8 25.f4 Nd7 26.Qg4 g6 (26...f6 27.Qh5 g6 28.Qg4+–) 27.Qf3+– Kf8 28.Rb2 Rb7 (28...Ng7 29.Qd3+–) 29.Qh3 Kg8 30.f5 (30.Nd6!? Rb2 31.Bb2 Rf8+–) 30...Nd4 (30...Ng5 31.Qh6 Ne5 32.Nd6 Rb2 33.Ne8 Qe8 34.Bb2+–) 31.Nd6 (better is 31.fg6!? fg6 32.Nd4 cd4 33.Rb7 (33.Bd4?! Rb2 34.Bb2 Re4+=) 33...Qb7 34.Bd4+/– (34.Rd4 Qb1 35.Kf2 Nc5+=)) 31...Rb2+= 32.Ne8 (32.Bb2 Qd6 33.fg6 fg6 34.Bd4 cd4–+; 32.Bd4 cd4 (32...Qa4 33.Rf1 cd4 34.fg6 hg6 35.Ne8=) 33.Ne8 Nc5 34.fg6 hg6+=) 32...Ne2 (32...Qa4 33.Rf1 (33.Bb2 Qd1 34.Kf2 Qe2 35.Kg3 Qe1 36.Kg4 h5 37.Qh5 gh5 38.Kh5 Qh4) 33...Ne2 34.Kh1 Qc4 35.Bb2 Ng3 36.hg3 Qf1 37.Kh2+–) 33.Kh1 With the decisive threat Qh6 (33.Kh1 Kf8 34.fg6 (worse is 34.Bb2 Qa4 35.Qd3 Ke8 36.Qe2 Nb6+–) 34...fg6 35.Rf1 Ke8 36.Bb2+–) 1–0. Woelfelschneider,Peter (1700) – Kruimer,Wim (1700), TT–01 TSC, 2001.

4.d4 g6 5.Nf3+= Bg7 6.c4 cb5 7.cb5 Nf6 8.Bd3 0-0 9.0-0 Nbd7 10.Nc3 Nb6 11.e4 Be6 12.Bg5 h6 13.Bf6 Bf6 14.h3 Rc8 15.Ne2 Bc4= 16.Qd2 Bd3 17.Qd3 d5 18.e5 Bg7 19.Rac1 Qd7 20.Nd2 e6 21.Rc3 Rc3= 22.Nc3 Rc8 23.Rc1 Nc4 24.a4 Nd2 25.Qd2 Rc4 26.Ra1 b6 27.Nd1 Qc7 28.Ne3 Rc3 29.g3 Kh7 30.Kg2 Rb3 31.Rc1 Qe7 ½–½. Rushton,Darren – Kruimer,Wim HJ (1700), TT–01 TSC, 2002.

4.Nf3 e5 5.Nc3 Nf6 6.e4 d5 7.Ne5 =.

4.Bb2 Bd6 5.Nf3 Qe7 6.d4 e4 7.Nfd2 Nf6 (7...Bc7 8.bc6 bc6 9.Qg4+=) 8.c4 (8.Nc4!? Nd5 9.Nd6 Qd6 10.c4 Qb4 11.Qd2+/–) 8...Bb4 9.a3 Bd2 10.Nd2 (< 10.Kd2 cb5 11.cb5 d5=+) 10...d5 11.c5 0–0 12.b6 Bg4 13.Be2 (13.Qa4!?+=) 13...Be2 14.Qe2 Nbd7 15.a4 Rfe8 16.0–0–0 (16.Bc3!?=) 16...Nf8 17.g3 Ne6 18.h4 Nd7 19.g4 (19.Kb1 Rab8=+) 19...Ndc5 20.dc5 Qc5 21.Kb1 Qb6 22.Ka2 (better is 22.Nf1–/+) 22...c5?? (better is 22...Qb4!? 23.Rc1 Qa4 24.Ba3 c5–+) 23.h5 (23.Qb5 Qb5 24.ab5 Red8=) 23...Qb4 (23...c4 24.f3 Rac8–/+) 24.Ba3 (better is 24.Qb5=) 24...Qa4–+ 25.Nb1 d4 26.h6 (26.Rc1 d3 27.Qd1 Qc6–+) 26...g6 (26...b5 27.hg7 b4 28.Qc4–+) 27.Qb2 (27.Rc1 b5 28.Qd1 Qd1 29.Rhd1 de3 30.fe3 b4–/+) 27...Qc4 (27...b5 28.Nd2 b4 29.Ne4 Reb8–+ (29...Qa3?! 30.Qa3 ba3 31.Nf6 Kf8 32.ed4=+; < 29...ba3 30.Qb3 Qb3 31.Kb3–+)) 28.Ka1 b5 29.Qa2 (better is 29.Nd2 Qa4 30.Ne4–/+) 29...Qa2–+ 30.Ka2 b4 31.Bb2 d3 32.Nd2 Rec8 (better is 32...Nf8–+) 33.Ne4 c4 34.Ba1? (better is 34.Nf6 Kf8 35.Nh7 Ke7 36.Nf6–+) 34...c3 (better is 34...Kf8!? 35.Nd6 a4 36.Rc1–+) 35.f4?? (better is 35.Rd3!? Rc4 36.Nf6 Kh8 37.Rhd1=) 35...a4 (35...d2 36.Nd2 Nc5 37.Bc3 bc3 38.Nc4–+) 36.f5? (better is 36.Bc3 bc3 37.Rd3=+) 36...b3?? (36...Nc5 37.Nc5 Rc5 38.Rd3 c2–/+) 37.Ka3= Nc5?? (37...gf5 38.Nc3 f4+=) 38.Nf6+– Kf8 39.Bc3 Ke7 40.Bb4 (40.Nh7 Ne4 41.Bb4 Ke8 42.Rd3 Rc2+–) 40...Rab8?? (better is 40...Kf6 41.fg6 Kg6 42.Bc5 Rc5 43.Rd3 Rc2 44.Rd6 Kg5–+) 41.Nd5 (41.Nh7!? gf5 42.gf5 Rc6+–) 41...Kd6 42.Rd3 Ke5 (42...Rb4 43.Nb4 Nd3 44.Nd3 gf5 45.gf5 Rc3+–) 43.Ne7 (better is 43.Bc3 Kd6 44.Rdd1 Kc6 45.Ne7 Kb5 46.fg6 fg6 47.Nc8 Rc8+–) 43...Ke4?? (43...Nd3 44.Nc8 Rb4 45.fg6 fg6 46.Ne7 Rg4 47.Nc6 Ke4 48.Ka4–+) 44.Rhd1 (better is 44.Rc3 Na6 45.Rc8 Rb4 46.Rc6+–) 44...Nd3–+ 45.Rd3 (45.Nc8 Rc8 46.fg6 fg6 47.Be7–+) 45...Kd3 46.Nc8 Rb4! 47.Kb4 b2 48.Nd6 (48.Ka4 gf5 49.gf5 b1Q–+) 48...b1Q 49.Kc5 Qc2 50.Kb6 (50.Kb4–+) 50...a3 51.Nb5 a2 52.Nd4 a1Q 53.Nf3 Qab2 54.Ka7 Qa4 0–1. slavisa11 – drsmith, Live Game Caissa's Web, 2004.

4.Bb2 Qe7 5.c4 Nf6 6.Be2 e4 7.d3 cb5 8.cb5 Qb4 (8...d5 9.Nd2=) 9.Qd2 Qb5 10.de4 Qg5 11.Bf3 Nc6 12.Nh3 Qh4 13.Nf4 Bb4 14.Bc3 0-0 15.g3 Ne5 (15...Qg5 16.h4 Qh6 17.Bb4 ab4 18.Qd6+=) 16.Bg2 (16.Be2!? Qh6 17.Bb4 ab4 18.Qb4+–) 16...Qg4+= 17.0-0 Bc3 18.Nc3 Nf3 19.Bf3 Qf3 20.Qd4 (20.Qd1 Qd1 21.Rfd1+– (worse 21.Nd1 Ne4 22.f3 Nd2=+; 21.Rad1?! b5+–)) 20...b5= 21.Nfd5 Nd5 22.Qd5 d6 23.Qd1 (23.Qa8?? Bh3 24.Qf8 Kf8 25.Nb5 Qg2; 23.Nb5?? Bh3 24.e5 Qd5–+; 23.Qb5?? Bh3 24.Qa5 Qg2; 23.Qd6?? Bh3 24.Qf8 Kf8 25.Nb5 Qg2) 23...Qd1 24.Rfd1 (worse 24.Nd1 b4=+) 24...b4 25.Nb5 Be6 26.Rd6 Rfc8 27.Nd4 Bc4 28.Rb6 Bd3 29.f3 Rc3 30.Kf2 Rac8 31.Ke1 (31.Rd1 Ra3 32.Rd2 h6+=) 31...Ra3 (31...Kf8 32.g4=) 32.Kd2 (32.Nf5!? Kf8 33.h4+=) 32...Bc4=+ 33.Rc6 Rc6 34.Nc6 Ba2 35.Nd4 Bc4 36.Ra3 ba3 37.Kc3 a2 38.Kb2 Kf8 39.Nc6 Be2 (39...a4 40.g4=) 40.f4+= Bf3 41.Na5 Be4 42.Ka2 Ke7 43.Kb3 Ke6 44.Kc4 Kf5 45.Kd4 Bg2 46.Nc4 Kg4 47.Ne5 Kh3 48.Nf7 Kh2 49.g4 Kg3 50.g5 Kg4 51.Ke5 Bc6 52.Nd8 Ba4 53.Ne6 h5 54.gh6 gh6 55.f5 h5 56.f6 Be8 57.Ng7 Bf7 58.Nh5?? (better 58.Nf5 Kg5 59.Ng3+–) 58...Kh5= 59.Kf5 Kh6 60.e4 Kh7?? (60...Bg6 61.Ke6 Be4 62.Kd7=) 61.e5+= Kg8 62.e6 Kf8 63.e7 Ke8 64.Kg5 Be6 ½–½. Zak,Pawel (1720) – Mirski,M (1980), 54th Rubinstein Mem (7), 2018.

4.Bb2 Qe7 5.Nf3 =.

4.c4 Bb4 5.Bb2 d6 6.Nf3 (6.a3 Bc5=) 6...Nf6 7.Be2 0-0 (7...cb5 8.a3 e4 9.ab4 ef3 10.Bf3 bc4 11.d3+=) 8.0-0 Bd7 (8...cb5 9.a3 e4 10.ab4 ef3 11.Bf3 bc4 12.d3+=) 9.d3 (9.d4 e4 10.Nfd2 cb5 11.cb5 Qb6=) 9...Qe8 (9...cb5 10.a3 Bc5 11.d4 ed4 12.ed4= (worse is 12.Nd4 bc4 13.Bc4 Nc6+=)) 10.h3 (10.d4 e4 11.Nfd2+=) 10...cb5+= 11.cb5 (11.a3 Bc5+=) 11...Bb5–/+ 12.Qb3 (12.Nc3 Bc6–/+) 12...Nc6 Black intends a4 13.a3 (13.a4 Ba6–/+) 13...a4 14.Qa2 Bc5 (14...e4 15.Nd4 ed3 16.Bf3 Nd4 17.Bd4+=) 15.Nc3 Na5 (15...Ba6 16.Rac1–/+) 16.Nb5+= Qb5 17.Be5 (17.Rfe1!? Qb3 18.d4 ed4 19.ed4+=) 17...de5+= 18.d4 Qb3 (18...Qe8!? 19.dc5 Nb3+=) 19.dc5= Rac8 20.Ne5 Rc5 21.Ng4 Ne4 22.Rfd1? (22.Rfb1 Qa2 23.Ra2 f5+=) 22...Qa2?? (better is 22...Nc3 23.Qd2 f5–+) 23.Ra2+= Nc3 24.Rc2 Ne2 25.Re2 h5 26.Nh2 ½–½. Wall,Bill – McKone,Peter, Palo Alto CA, 1990.

4.c4 Bb4 5.Bb2 d6 6.Nf3 Nf6 7.Be2 0-0 8.0-0 Bd7 9.d3 Qe8 10.h3 cb5 11.cb5 Bb5 12.Qb3 Nc6 Black prepares the advance a4 13.a3 a4 14.Qa2 Bc5 15.Nc3 Na5 16.Nb5 Qb5 17.Be5 de5 18.d4 Qb3 Attacks the isolani on a3 19.dc5 Rac8 20.Ne5 Rc5 21.Ng4 Ne4 22.Rfd1 Nc3 23.Qb3 Ne2 24.Kf1 Nb3 (worse is 24...ab3 25.Ke2 Rc2 26.Rd2–/+) 25.Ke2 Na1 26.Ra1 f5 (26...h5 27.Nh2–+) 27.Nh2 Rc2 28.Kf1 (28.Kf3 b5–+) 28...Rfc8 0–1. Mckone,Peter – Wall,Bill, Palo Alto, CA, 1990.

4.c4 cb5 5.cb5 d5 6.Bb2 Nd7 7.Nf3 e4 8.Nd4 Nb6 (8...Ne5 9.Nc3=) 9.Nc3 a4 10.Rc1 Nf6 11.Be2 Be7 (11...a3 12.Ba1=) 12.0-0 0-0 13.d3 Bd6 14.Rc2 Qe7 15.Qd2 Bd7 16.Rfc1 Rfe8 17.Rd1 (17.Nd1 Rac8=) 17...Ng4 (17...Qe5 18.g3=) 18.h3 Nf2 (18...ed3!? 19.Bd3 Ne5=) 19.Kf2+= Qh4 20.Kg1 Bh3 21.Bf3 (21.de4 Bg2 22.Nf3–/+) 21...ef3–+ 22.Nf3 Qg3 (22...Qh5 23.Ne2–+) 23.Qf2–/+ Qf2 24.Kf2 Bd7 25.Ne2 (25.Rdc1!?–/+) 25...Bb5–+ 26.Nfd4 Ba6 (26...Bd7 27.Rb1–+) 27.Nf5–/+ Bf8 28.Bd4 Nd7 29.Nf4 g6 (29...Rac8!? 30.Rc3 Rc3 31.Bc3 Nc5–+) 30.Ng3–/+ Rac8 31.Re2 b5 32.Nd5 Bb7 33.Nc3 Bc6 34.Rb2 b4 35.Nce2 a3 36.Rc2 Ba4 37.Rc8 Rc8 38.Rc1 Nc5 39.Bc5 Rc5 (39...Bc5? 40.d4 Bd7 41.dc5+/–) 40.Rc5 (40.Ne4 Rc1 41.Nc1 f5–+) 40...Bc5–+ 41.Nc1 f5 42.Nf1 f4 (42...Bc6 43.Nd2–+) 43.Ke2 (43.d4 fe3 44.Ke3 Be7–+) 43...fe3–+ 44.Ne3 Be3 (44...h6 45.Ng4 Kg7 46.Ne5–+) 45.Ke3 Bc6 46.Kd4 Bg2 47.Kc4 h5 48.Ne2 b3! 49.Kb3 (49.ab3 a2 Passed pawn; 49.Kb3 h4 Passed pawn) 49...h4 50.Ka3 g5 51.Kb4? (51.Nd4–+) 51...Bf3 52.Nd4 Bg4 (52...Bg4 53.Nc2 h3–+) 0–1. marekt (2230) – pvanr (2315), gameknot.com, 2016.

4.c4 cb5 5.cb5 d5 6.d4 e4 7.Ba3 =.

4.c4 d5 (--> 3...d5 4.c4 e5).

4.d4 e4 5.c4 Nf6 6.Nc3 cb5 7.Nb5 =.

4.Nf3 e4 5.Nd4 c5 =.

4.Nf3 e4 5.Nd4 Nf6 =.

5.a4 Bd7 6.d4 Qc7 7.de5 de5 8.Nf3 f6 9.Bc4 (9.Bd3 cb5 10.ab5 Be6+=) 9...Ne7 (9...cb5 10.Bb5 Nc6 11.0-0=) 10.Nbd2 Nd5 11.0-0 Bb4 12.Ne5 (better 12.Qe2!?=) 12...fe5-/+ 13.Qh5 g6 14.Qg5 (14.Qe5 Qe5 15.Be5 Rf8=+) 14...Bc3 (14...Bf5 15.e4 Bd2 16.Qd2=+) 15.Ne4 (15.Bc3!? Nc3 16.b6-/+) 15...Bb2-+ 16.b6 Nb6?? (16...Qb6 17.Nd6 Kf8 18.Bd5 e4-/+ (18...cd5?? 19.Qf6 Kg8 20.Qf7)) 17.Nf6+- Kf8?? (better 17...Kd8 18.Nd5 Kc8 19.Ne7 Kd8 20.Nc6 Kc8 21.Ne7 Kd8 22.Ng6 Kc8 23.Ne7 Kd8 24.Nd5 Kc8 25.Nc7 Kc7+-) 18.Qh6 Ke7 19.Qg7 Kd6 (19...Kd8 20.Qh8 Ke7 21.Qg7 Kd8 22.Qf8 Be8 23.Qe8) 20.Ne4 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.a4 f5 6.c4 Nf6 7.d4 e4 8.Nc3 d5 9.Nh3 Bd6 (9...Bb4 10.Nf4=) 10.Qb3 Be6 (10...Bc7 11.Rb1+=) 11.Be2 (11.c5 Be7+/-) 11...0-0 (11...dc4 12.Bc4 Bc4 13.Qc4=) 12.0-0 (12.bc6 Nc6 13.Ng5+= (13.Qb7? Nb4 14.Ng5 Bd7-+; 13.Nd5?! Nd5 14.cd5 Bb4 15.Bc3 Qd5=)) 12...Ng4= 13.g3 Nf6 (better 13...dc4!? 14.Bc4 Bc4 15.Qc4 Kh8=) 14.Ng5+/- Qd7 (14...Bf7 15.cd5 Qe7 16.Nf7 Qf7 17.Bc4 cb5 18.Nb5+-) 15.Ne6 Qe6 16.cd5 cd5 (16...Nd5?? 17.Bc4 Kh8 18.bc6 (18.Bd5?! cd5 19.Qd5 Qd5 20.Nd5 Nd7+/-; 18.Nd5?! cd5 19.Bd5 Qd7+-) 18...bc6 19.Nd5+- (19.Bd5?! cd5 20.Qd5 Qd5 21.Nd5 Nc6+/-)) 17.Ba3?? (17.Nd5!? Kh8 18.Bc4 Qe8+-) 17...Kh8 (17...Ba3 18.Qa3 Nbd7 19.Rac1=) 18.Bd6 (better 18.Nd5!? Nbd7 19.Bd6 Qd6 20.Nf4+/-) 18...Qd6= 19.Rfc1 Nbd7 20.Qa3 Qa3 21.Ra3 Rac8 22.Kf1 (22.Ra2 Rc7=) 22...g5 23.h3 Nb6 (23...Rc7 24.Ke1=+) 24.Ke1 f4 25.ef4 gf4 26.Kd2? (better 26.gf4 Ne8 27.Bg4=+) 26...f3 27.Bf1 Nc4 28.Bc4 Rc4 (worse 28...dc4 29.Ke3+=) 29.Nd1 (29.Ke3-/+) 29...Rfc8 (better 29...Rd4!? 30.Ke1 Rd8-/+) 30.Rc4=+ Rc4 (30...dc4 31.Ne3 Ne8 32.d5+-) 31.Ne3? (better 31.Ke3=+) 31...Rd4-+ 32.Kc2 (32.Kc1 Rb4 33.Nf5 d4-+) 32...Rb4 33.g4 (33.Nf5 d4 34.Ra1 Nd7-+) 33...d4 34.Nf5 (34.Nf1 d3 35.Kc1 Nd5-+) 34...Nd5 35.g5 (35.Ra1 d3 36.Kd1 Nc3 37.Kd2 Na4-+ (37...Ra4?! 38.Rc1=+)) 35...Nf4 (35...d3 36.Kc1 Rc4 37.Kd1-+) 36.h4 (36.Nd6 e3 37.Nf7 Kg7 38.Ne5 Nh3 39.Nf3 ef2 40.Nd2 Ng5 41.Ra1-+) 36...Nd3 (36...Nh3 37.Nd6 Nf2 38.Ra1-+) 37.h5?? (better 37.Rd3 ed3 38.Kd3 Ra4 39.Nd4-+) 37...Rb2 38.Kd1 e3 (worse 38...Rf2 39.Rd3 ed3 40.Ng3-+) 39.fe3 f2 40.Ng3 (40.Ng3 de3 41.Rd3 e2 42.Kc1-+). zembelek (1975) - pathetic77 (1970), Rated Blitz game, lichess.org, 2013.

5.a4 Bf5 6.c4 (6.Nf3 Nf6=) 6...Nf6 7.Nf3 Nbd7 (7...Be7 8.Be2=) 8.Nc3 (8.Be2 Be7=) 8...Be7 (8...d5 9.bc6 bc6 10.cd5 cd5 11.Nb5=) 9.d4 (9.Be2 0-0=) 9...0-0 (9...cb5 10.ab5 Qc7 11.Nh4=) 10.Be2 Qc7 (10...e4 11.Nd2=) 11.Nh4 (11.Rc1 Nb6=) 11...Bg6 (11...Be6!?=) 12.0-0 Ne8 (12...Rae8 13.Ng6 fg6 14.Rb1+=) 13.Ng6+– hg6 (13...fg6 14.Bg4+–) 14.Ba3 (14.d5 cb5 15.Nb5 Qb6+–) 14...Rd8 (14...Nef6 15.Qd3+–) 15.Rb1 (15.d5 Nef6+–) 15...f5 (15...Nef6 16.e4+–) 16.de5 (16.bc6 bc6 17.d5 Nef6+–) 16...Ne5 17.f4 (17.Qd4 Bf6 18.Qf4 Ng4 19.Bg4 fg4+=) 17...Nf7 (17...Nd7+–) 18.g4 (18.Bb2 Nf6+–) 18...Nf6 (18...d5!? 19.c5 Bf6=) 19.g5+– Nd7 20.e4 (20.Bf3 Rfe8+–) 20...Nc5 (20...Rde8 21.bc6 bc6 22.Qd4+=) 21.ef5 (21.bc6 bc6 22.Qd4 Rde8+=) 21...gf5 22.Qc2 (22.Bf3 Ne6 23.Qd2 Rfe8+–) 22...g6 (22...d5 23.bc6 bc6 24.cd5 cd5 25.Nb5=) 23.h4 (23.b6 Qd7+=) 23...d5= 24.bc6 bc6 25.cd5 cd5 26.Nb5 Qc8 (26...Qd7!?+=) 27.Nd4 (27.Bd1 Qe6+=) 27...Rfe8 (27...Qc7!?+–) 28.Bb5+– Ne4 29.Qc8 (29.Be8 Ba3 30.Bf7 Kf7 31.Qc8 Rc8 32.Rb7 Ke8+–) 29...Rc8 30.Be8 Re8 (30...Ba3 31.Bf7 Kf7 32.Rb7 Ke8+–) 31.Be7 Re7 32.Rfc1 (32.Rb6 Nfd6+–) 32...Nfd6 (better 32...Ned6 33.Rc6 Re4+–) 33.Rb8 Kf7 34.Nc6 (34.Nc6 Re8 35.Ne5 Re5 36.fe5+–) 1–0. Ree,Hans (2455) – Bohm,Hans (2435), Radio game NED, 1985.

5.Nc3 Nf6 6.Nf3 Be7 7.Bd3 0-0 8.0-0 h6 9.a4 (9.h3 Be6=) 9...Qc7 10.e4 Bg4 (10...Nbd7 11.Qe2=) 11.h3 (11.Bc4 cb5 12.Bb5 Nc6=) 11...Be6 12.Qe2 (12.Be2 Nbd7=) 12...Nbd7 13.Ba3 (13.Bc4 d5 14.bc6 bc6 15.ed5 Nd5 16.Nd5 cd5=) 13...Rfe8 (13...Nh5 14.Rfb1+=) 14.Rab1 (14.Nh4=) 14...b6 (better is 14...Nh5!?+=) 15.bc6+= Qc6 16.Bb5 Qc7 17.Nh4 Rac8 18.Rfe1 Bc4 19.Bc4 (19.Qe3 Be6+/–) 19...Qc4+= 20.Qc4 Rc4 21.Nf5 Nc5 Now all is on e4. The isolani on a4 becomes a target (better is 21...Rc6!?+=) 22.Bc5+– bc5 23.Rb5 Bf8 (23...g6!? 24.Ne7 Re7 25.Ra5 Re8+–) 24.Ra5+– g6 (24...Rb4 25.Ra7+–) 25.Ne3 Rb4 (25...Rd4 26.d3+–) 26.Ned5 Nd5 27.Nd5 (27.Nd5 Rc8 28.Nb4 cb4 29.c3 bc3 30.dc3+–; 27.ed5?! h5+/–) 1–0. gtate (2520) – gtan (2215), net–chess.com, 2007.

5.c4 f5 6.a4 (6.d4 e4=) 6...Nf6= 7.Nc3 Be7 8.Nf3 0-0 9.Qb3 Kh8 (9...e4 10.Nd4=) 10.d4= e4 11.Nd2 Qe8 12.Be2 Bd8 (12...Qg6 13.0-0=) 13.0-0 Nbd7 14.Ba3 Bc7 15.Rab1 Qg6 16.Rfc1 Rf7 17.Bf1 d5 (17...Ng4 18.h3 Ngf6 19.Be2=) 18.Ne2 (18.bc6 Bh2 19.Kh2 Qh6 20.Kg1 Ng4-+) 18...f4 (18...Bh2 19.Kh2 Qh6 20.Kg1 Ng4 21.Nf3 ef3 22.Bd6 f4 23.Bf4 Rf4 24.Nf4 Qh2) 19.Nf4+/- Bf4 20.ef4 Nh5 (20...cb5 21.Qb5 Nh5 A) worse 22.Qd5 Nf4 23.Rb6 Nh3 (worse 23...Nd5 24.Rg6 hg6 25.cd5+/-) 24.Kh1 Nf2 25.Kg1 Nh3 26.Kh1 A1) 26...Qb6? 27.Qf7 Nf6 28.Qf8 (worse 28.gh3 Be6 29.Qe7 e3+-) 28...Ng8 29.c5+-; A2) 26...Nf2 27.Kg1 Nh3 28.Kh1 A21) 28...Qb6? 29.Qf7 Nf6 30.Qf8 (worse 30.gh3 Be6 31.Qe7 e3+-) 30...Ng8 31.c5+-; A22) 28...Nf2=; B) 22.Rc3 Nf4 23.cd5+/-) 21.g3 (21.bc6 Ndf6 22.f5 Qf5 23.cd5 Nd5 24.Ne4 bc6+-) 21...Nf4 (21...cb5 22.Qb5 Nf4 23.cd5 Nd3+-) 22.Bg2?? (better 22.bc6 bc6 23.cd5 Nd5 24.Bg2+/-) 22...Ng2?? (22...Ne2 23.Kh1 Nc1 24.Bc1 cb5 25.Qb5 Rf2 26.cd5 e3-+) 23.Kg2=+ Nf6 24.bc6 bc6 25.cd5 cd5 (better 25...Ng4 26.Qb6 Rf2 27.Kg1 h6-/+) 26.Nf1?? (better 26.Qb8! Rf8 27.Bf8 Rb8 28.Rb8+-) 26...Bg4 (26...Qh5 27.Ne3-/+) 27.Ne3=+ Bf3 (27...Qh5 28.Kg1=+) 28.Kg1= h5 (28...Rd7 29.Rc5=) 29.Rc6+= (29.Nd5 Nd5 30.Qd5 e3-/+) 29...h4 30.Nd5 hg3 (better 30...e3 31.Nf4 Qf5=) 31.hg3?? (better 31.fg3 e3 32.Nf4+=) 31...Qh5-+ 32.Qf3 ef3 (32...Qf3 33.Rc3 e3 34.Re3 Qd5 35.Rd3-+) 33.Nf4 Qg4 (33...Qh7 34.Rcb6 Nd7 35.Ng6 Kg8 36.Rc6-+) 34.Rb5 Re8 35.Kf1 (35.Re5 Re5 36.de5 Ne4-+) 35...Rd7 (35...Ne4 36.Rh5 Kg8 37.Re5 Re5 38.de5 Rf4 39.Ke1-+) 36.d5 (36.Bd6-+) 36...Nd5! 37.Ng6 (37.Rd5 Rd5 Combination; 37.Nd5 Qh3 Mate attack) 37...Qg6 (37...Kh7 38.Nf8 Kg8 39.Rh6 Qc4 40.Kg1 Re1 41.Kh2 Qf1 42.Rh8 Kf7 43.Nd7 Qg2) 38.Rg6 Nf6 39.Rb1 Rd5 (better 39...Kh7 40.Rf6 gf6-+) 40.Bc5?? (40.Re1 Re1 41.Ke1 Ne4-+) 40...Kg8 (better 40...Rc5 41.Rd1 Kh7 42.Rf6 gf6-+) 41.Be3 Rd3 (41...Re4!? 42.Rg5-+) 42.Rg5-/+ Rde3 (better 42...Ne4!? 43.Rgb5 Nc3-/+) 43.Rg7 (43.Rg7 Kg7 44.fe3 Re3 45.Rd1-+). ClayPigeons (2165) - cro_stallione (2210), Rated Bullet game, lichess.org, 2020.

5.c4 Nf6 6.Nc3 =.

5.c4 g6 6.Nf3 Bg7 7.d4 Qe7 (7...ed4 8.Nd4 Nf6 9.Nc3+=) 8.Be2 e4 9.Nfd2 Nf6 10.0-0 0-0 11.Re1 h5 12.Nc3 Bf5 13.Nf1 h4 14.a4 Nbd7 15.Ba3 (15.h3!?=) 15...c5+= 16.dc5 (16.h3!?+=) 16...Nc5 17.Rc1 Rfe8 18.Nd5 Nd5 19.Qd5? (better is 19.cd5!? Rad8 20.Nd2+=) 19...Rac8 (19...Rad8 20.Qd2–+) 20.Red1 (20.h3 Rcd8–+) 20...Red8 21.Bc5?? (21.Rc2–+) 21...dc5 (21...Rc5?! 22.Qd2 b6 23.h3–/+) 22.g4 (22.Nd2 h3 23.g3 Bh6–+) 22...Rd5 23.cd5 Bd7 (23...Bg4 24.Bg4 Qg5 25.h3–+) 24.h3 (24.Nd2 h3 25.d6 Qd6 26.Ne4 Qe7–+) 24...b6 (24...c4 25.Bc4 Qb4 26.Nd2 Qa4 27.d6–+) 25.Bc4 (25.Nd2 f5–+) 25...Qd6 26.Nd2 f5 27.Be2 Kh7 (27...Rf8 28.Nc4 Qf6 29.Rd2–+) 28.Nc4 Qb8 29.d6 Rf8 30.gf5 gf5 31.Rd2 f4 (better is 31...Be6 32.f4–+) 32.Rd5 (32.Bg4 Qd8 33.Kh1 Bg4 34.hg4 fe3 35.fe3–+) 32...f3 33.Bf1 Qd8 34.Kh2 (34.Nb6 Qb6 35.Rcc5 Qd8–+) 34...Be6 35.Rd2 (35.Rcd1–+) 35...Qg5 36.Nb6 (36.Rd5 Bd5 37.Rc2 Rg8 38.d7 Bc3 39.d8Q Qg1) 36...Be5 37.Kh1 Rg8 0–1. Puentes,Alvaro (2115) – Nunez V,Daniel Fernando (2240), IRT Camp Nal Mayores Absoluto AJEDREZ B, 2012.

5.bc6 bc6 (5...Nc6 6.Nf3=) 6.c4 (6.Nc3!?+=) 6...Nf6 7.d3 (7.Nc3 Na6=+) 7...Nbd7 8.Nd2 d5 (8...Rb8!? 9.Rb1 Nc5=) 9.Ngf3 e4 10.de4 de4 11.Ne5 (11.Nd4 Ne5=) 11...Bd6 (11...Ne5!? 12.Be5 Bd6=+) 12.Nd7= Bd7 13.Be2 (13.Qc2 Qe7=) 13...Bf5 (13...0-0=+) 14.0-0 (14.g4 Bg6 15.c5 Bc5 16.h4+=) 14...Qb8?? (14...Bh2!? 15.Kh2 Qb8 16.Kg1 Qb2=+) 15.Rb1 (better 15.Bf6!? gf6 16.Rb1+–) 15...Bh2= 16.Kh1 Be5 17.Ba3 (17.c5 0-0 18.Nc4 Bb2 19.Rb2 Qa7=+) 17...Qc7 18.Qb3 (18.Nb3 h5 19.Nd4 Bd7=+) 18...Rd8 19.Rfd1 Bd6 (better 19...h5 20.Bc5 Nd7–/+) 20.Bd6= Rd6 (20...Qd6? 21.Ne4 Qe5 22.Rd8 Kd8 23.Rd1 Kc7 24.c5+–) 21.Qb8 (21.c5 Rd5 22.Qb6 Qb6 23.cb6 Ke7=) 21...Qd8 22.c5 Rd5 (22...Qb8 23.Rb8 Rd8 24.Rd8 Kd8 25.Ne4 Nd7 26.Ng3=) 23.Bc4 (23.Qd8 Rd8 24.Nc4 Ke7+=) 23...0-0 24.Bd5 Qb8 25.Rb8 Rb8 26.Bc6 Kf8 27.Nc4 Rc8 (27...Be6 28.Na5 Rb2 29.f3=) 28.Na5 Ng4 29.Kg1 Ne5 30.Rd6 Ke7 31.a4 (31.Rd5 Nc6 32.Nc6 Rc6 33.Rf5=) 31...Nd3 (31...g6 32.Kh2=) 32.f3 (32.Rd4!? Kf6 33.Be4 Be4 34.Re4 Rc5 35.Nc4+–) 32...Be6= (worse 32...Nc5 33.Rd5 Nb3 34.Rf5 Na5 35.Bd5+–) 33.Be4 Nc5 34.Rd4 Bd7 (34...Ne4 35.Re4 f5 36.Rb4=) 35.Bc2 (35.Nc4 A) 35...Ba4? 36.Nb6 Rd8 37.Rc4+– (37.Na4?! Rd4 38.Nc5 Rd1 39.Kf2 Rd2 40.Kg3 Re2+=; 37.Ra4?! Na4 38.Na4 g6+=); B) 35...Ne4 36.Re4 Be6+=) 35...Ne6= 36.Rc4 Ra8 (36...Rc5!? 37.Rc5 Nc5=) 37.Nc6+= Kd6 38.Nd4 Nc5 Increasing the pressure on the isolated pawn on a4 39.Nb5 Bb5 40.ab5 Ra1 41.Kf2 Ra2 42.Kg3 Rb2 (42...g6 43.Rd4 Kc7 44.Be4 Ne4 45.Re4+–) 43.Rd4 (43.Bh7 Rb5 44.Rg4 Ne6+=) 43...Ke6 (43...Ke7 44.Bf5=) 44.Bf5 Ke5 (44...Kf5 45.Rd5 Double attack) 45.f4 (45.Bh7 Rb5 46.Rf4 Ke6+=) 45...Kf6+= 46.Rd6 Kf5 47.Rd5 Ke6 (47...Ke4 48.Rc5 Ke3 49.Rc7 Rb5 50.Rf7+=) 48.Rc5+= f5 49.Rc6 Kf7 (49...Kd5!?+=) 50.b6+– h6 51.Kf3 Rb3 (51...h5 52.g3+–) 52.Rc7 (52.g4!? fg4 53.Kg4 Re3+–) 52...Kf6+– 53.b7 g5 54.Rc6 (54.g3 gf4 55.Kf4 Rb2+–) 54...Kg7 (54...Kf7 55.Rh6 g4 56.Kg3+–) 55.fg5 hg5 56.g4 (56.Rc7!? Kf6 57.Ke2+–) 56...f4 57.b8Q (57.Rc7 Kf6=) 57...Rb8 58.ef4 Rb3 ½–½. Popper,Tomas (2030) – Micanek,Tomas (2085), 27th Czech Open E, 2016.

5.d4 ed4 6.Qd4 Nf6 7.Nf3 Be7 8.c4 (8.Nc3 Nbd7+=) 8...0-0= 9.Bd3 Nbd7 10.0-0 Nc5 11.bc6 bc6 12.Bc2 Rb8 13.Nbd2 Ne8 14.Qc3 Bf6 15.Nd4 Nc7 16.Rab1 N7a6 17.a3 Qc7 (17...Bd7 18.N2f3=) 18.N2f3 Bd7 19.Qe1 (19.Qd2 Rfe8+=) 19...a4 (19...Rfe8 20.Bc3=) 20.Ba1 (20.Qe2 Rfe8=) 20...d5 (20...Rb1 21.Qb1 h6 22.h3=) 21.Qe2 Qd6 22.Bf5 Rb1 23.Rb1 Rb8 24.Rb8 Nb8 25.cd5 cd5 26.Bc3 g6 27.Bd7 Nbd7 28.Qb5 Qb6 29.Kf1 Qb5 ½–½. acalado58 (2200) – pvanr (2245), gameknot.com, 2015.

5.d4 Nd7 6.Nc3 (6.Nd2 Ngf6=) 6...Ngf6 7.Nge2 (7.e4 Be7=) 7...Be7 8.Ng3 0-0 9.Rb1 Nb6 (9...a4 10.a3=) 10.Bd3 (10.bc6 bc6 11.de5 de5=) 10...ed4 11.ed4 Bg4 12.f3 Be6 13.bc6 bc6 14.0-0 Rb8 15.Re1 Qd7 16.Qe2 Rfe8 17.Bc1 a4 18.Qf2 Nbd5 19.Rb8 Rb8 20.Nd5 Nd5 21.c4 Nb4 22.Bf1 Bh4 23.a3 (23.Bf4 a3=) 23...Bg3 24.Qg3 (24.hg3 Na6=) 24...Nc2 25.Bh6 (25.Rd1 Rb3=) 25...g6+= 26.Rd1 Qd8 (better is 26...Na3!? 27.Qf4 Qe7+=) 27.Bg5+= f6 28.Bc1 (28.Bf4 Rb2 29.Rd2 Qb6+=) 28...Rb3= Exerts pressure on the isolated pawn 29.d5 cd5 30.cd5 Bf7 (30...Qb6 31.Qf2 Bf5 32.Qb6 Rb6 33.g4+–) 31.Qh4 (31.Qf4 Na3 32.Qa4 Qb6 33.Kh1 Nb1+=) 31...Be8 (31...Qa5 32.Qf6 Qc5 33.Kh1+=) 32.Rd2 (32.Bc4 Rc3=) 32...Na3 33.Bb2 g5 34.Qd4 (34.Qe4 Bd7=) 34...Nb1 35.Rf2 (35.Rd3 Rb8=) 35...a3 36.Ba1 Bg6 (36...Bh5 37.Bd3=) 37.f4+= g4 38.f5 (38.Qd1 g3 39.Qb3 gf2 40.Kf2 Qe7+=) 38...Bh5= 39.Qc4 (39.Be2 Qe7 40.Bg4 Nd2=) 39...Rb8 40.Qf4 Qf8 41.Re2 Qg7 (41...Ra8 42.Re6+–) 42.Qd6 (42.Qd6 Qa7 43.Kh1+/–) 1–0. Zimmermann,Joerg – Schulz,Hans_Juergen, TT–04.50 TSC, 2002.

5.d4 Nd7 6.Nd2 Ngf6 7.de5 =.

5.d4 Nd7 6.de5 de5 7.Nf3 e4 8.Nd4 Ne5 9.Nd2 (9.bc6 bc6 10.Nc3 Nf6=) 9...Nf6 (9...Bg4 10.Be2 Be2 11.Ne2+=) 10.Nc6 Nc6 11.bc6 bc6 12.Bd4 (12.Bc4 Bb4=) 12...Bf5 (12...Bb4 13.c3 Bd6 14.Bf6 gf6 15.Ne4+/–) 13.h3 (13.Rb1 Bd6=) 13...Bd6 14.g4 (14.Nc4 Bb4 15.c3 Be7=) 14...Bg6 15.h4 (15.Nc4 Bb4 16.c3 Be7=) 15...h6 (15...c5 16.Bb5 Nd7 17.Bg7+/–) 16.Rb1 Qd7 (16...Rb8 17.Rb8 Bb8 18.Bg2=) 17.Nc4 (17.Bf6 gf6 18.h5 Bh7=) 17...Bc7 (17...Be7 18.Nb6 Qd8 19.h5+–) 18.Be2 (18.h5 Bh7+=) 18...Rd8 19.Rb7 (19.h5 Bh7+=) 19...c5 (19...Qc8 20.Qb1=) 20.Bf6 (20.Bc5 Qc6 21.Qb1 Qc5–+) 20...gf6+= 21.Qd7 Kd7 (21...Rd7 22.h5 Bh7 23.Ra7+=) 22.Ra7 (22.h5 Kc6 23.Ra7 Bh7 24.Ra6 Kd7 25.Na5 Ba5 26.Ra5 Ra8 27.Ra8 Ra8+/–) 22...a4 (better is 22...f5!?=) 23.h5+/– Bh7 24.0-0 (24.Ra4 f5+/–) 24...Kc6 (24...f5 25.Ne5 Ke6 26.Nf7 Kf7 27.Rc7 Kf6 28.Rc5+/–) 25.Ra6+/– Kd7 (25...Kb7 26.Ra4 Ra8 27.Rb1 Kc6 28.Na3+/–) 26.Rb1 (26.Ra4 Rhg8 27.Ra7+/–) 26...Rhg8 (26...f5!?+/–) 27.Rf6+– Ke7 28.Rh6 Bf5 29.Rc6 Rd7 30.h6 (30.Rc5 Bg4 31.Bg4 Rg4 32.Kf1 h4+–) 30...Be6? (30...Bg4 31.h7 Rg5+–) 31.Rc5+– Rh8 (31...Bd5 32.h7 Rh8 33.Rbb5+–) 32.Rh5 (32.Rh5 Rh7 33.g5+–; 32.g5 Rb8 33.Rb8 Bb8+–) 1–0. Woelfelschneider,Peter – Schulz,Hans_Juergen, TT–05 TSC, 2003.

5.d4 e4 6.d5 Nf6 7.Nc3 (7.dc6 bc6 8.Nd2 d5=) 7...a4 (7...Be7 8.dc6 bc6 9.Rb1=) 8.bc6 (8.a3 Be7=) 8...bc6 9.dc6 The passed pawn on c6 quickly leads to threats 9...a3 10.c7 Qc7 11.Nb5 Qc6 12.Bf6 (12.Ba3? Ra3 13.Qd2 Ra8–+; worse is 12.Na3 Ra3 13.Rb1 Ra2 14.Bf6 Qc2 (14...gf6? 15.Bb5+–; 14...Rc2?? 15.Bb5 Rc4 16.Bg5+–) 15.Qc2 Rc2 16.Rb8 gf6+=) 12...gf6 13.f3 Na6 (13...Be6 14.fe4 Nd7 15.Nf3+=) 14.fe4 Qe4 (14...Be6 15.Qd2+=) 15.Nd6 Bd6 16.Qd6 The mate threat is Bb5 16...Qe3 17.Ne2 Nc5?? (17...Be6 18.Qc6 Ke7 19.Qb7 Bd7 20.Rd1+=) 18.Qc6 Ke7 19.Rd1 (19.Qc7 Kf8 20.Qg3 Qg3 21.Ng3 Be6+=) 19...Ra6 (19...Be6 20.Qd6 Ke8 21.Rd4+=) 20.Qc7 Bd7?? (20...Nd7 21.Qf4 Qe6 22.Qb4 Kd8 23.c4+=) 21.Qg3?? (better is 21.Rd5+–) 21...Qe4 (21...Qg3 22.Ng3 Rb6 23.Bc4=) 22.Qc3 Rc8 Black terminates the opponent with strong threats 23.Rd4 Qe5 (23...Qe6 24.Rc4 Qe5 25.Rh4=) 24.Rh4 (24.Qd2 Rb6 25.Qd1 Rb2+=) 24...Re6 25.Qe5 (25.Qa3 Ra6 26.Qf3 Ra2–/+) 25...Re5+= 26.Kd2 (26.Rh7? Ne4–+) 26...Ne4 27.Kc1 Rb8 28.g3 (28.Rh7 Reb5 29.Nc3 Nc3 30.Bb5 A) worse is 30...Nb5 31.Re1 Be6 32.Rh4–/+; B) 30...Bb5?! 31.Re1 Kd6 32.Kd2 (worse is 32.Rf7 Na2 33.Kd2 Rd8–/+) 32...Na2 33.Re3+=; C) 30...Na2 31.Kd2 Rb5–+ (31...Bb5?! 32.Re1 Kd6 33.Re3=)) 28...Rb2 (28...Rb2 29.Re4 Re4–+) 0–1. Kruimer,Wim – Luzuriaga,Norberto Horacio, TT–01 TSC, 2002.

5.Qf3 Be7 6.Nc3 A) 6...a4 7.a3 (7.Qg3 a3 8.Bc1 g6 9.Nf3 Nf6 10.h4 Bf5 11.Be2 Bc2 12.d4; 7.Bd3 a3 8.Bc1 Nf6 9.Nge2 0-0 10.0-0 cb5 11.Bb5 Nc6 12.Rb1; 7.Nh3 a3 8.Bc1 Nf6 9.Bc4 0-0 10.0-0 d5 11.Bb3 Nbd7 12.Qg3; 7.Bc4 Nf6 8.a3 0-0 9.Nh3 d5 10.Be2 cb5 11.Bb5 Ra5 12.Qe2; 7.Ne4 Nh6 8.h3 0-0 9.Ne2 Be6 10.h4 cb5 11.Ng5 Nc6 12.Nc3) 7...Nf6 8.Bd3 0-0 9.Qg3 Nbd7 10.Nge2 Nc5 11.0-0 Nd3 12.cd3; B) 6...Nh6 7.h3 (7.Nh3 Bg4 8.Qe4 0-0 9.Bd3 Bf5 10.Qf3 Bg4 11.Qe4 Bf5 12.Qf3; 7.Be2 0-0 8.Nh3 a4 9.Qh5 Ng4 10.Ng5 Bg5 11.Bg4 a3 12.Bc1; 7.Bd3 Bg4 8.Qe4 Nd7 9.bc6 Nc5 10.cb7 Ne4 11.ba8R Qa8 12.Be4; 7.h4 Bh4 8.Be2 0-0 9.Qe4 Be7 10.Nf3 a4 11.bc6 Nc6 12.Nd5; 7.Qd1 0-0 8.Nf3 Be6 9.Be2 Nd7 10.0-0 Qc7 11.d4 d5 12.bc6) 7...0-0 8.Nge2 Nf5 9.g3 d5 10.bc6 bc6 11.e4 de4 12.Ne4; C) 6...Nf6 7.Qd1 (7.h3 0-0 8.Nge2 d5 9.Ng3 Bd6 10.e4 d4 11.Na4 cb5 12.Bb5; 7.Nh3 0-0 8.Ne4 Ne4 9.Qe4 Be6 10.Bd3 f5 11.Qf3 Bd5 12.Qh5; 7.Qe2 0-0 8.Qd1 d5 9.Nf3 e4 10.Nd4 c5 11.Nde2 a4 12.d3; 7.Rb1 0-0 8.h3 d5 9.Nge2 Bd6 10.g4 h6 11.Qg2 Be6 12.Rg1) 7...0-0 8.Be2 h6 9.d4 ed4 10.ed4 cb5 11.Nb5 Nc6 12.Nf3.

5.Qf3 Be7 6.Bd3 A) 6...cb5 7.Nc3 (7.Bb5 Nc6 8.h3 Nf6 9.Nc3 0-0 10.Nge2 Qb6 11.0-0 Be6 12.a4; 7.Na3 b4 8.Nc4 Nf6 9.e4 Na6 10.Qe2 Nc5 11.Nh3 0-0 12.0-0; 7.Qg3 Nf6 8.Nc3 0-0 9.Nge2 b4 10.Ne4 Nc6 11.Qf3 Ne8 12.N4g3) 7...b4 8.Nb5 Nf6 9.Ne2 Nbd7 10.Ng3 Nc5 11.Bf5 Qb6 12.Qe2; B) 6...Nf6 7.Nc3 (7.Nh3 Nbd7 8.bc6 Nc5 9.Bb5 0-0 10.Nc3 Qb6 11.c7 Bg4 12.Qg3; 7.Ne2 Bg4 8.Qg3 e4 9.Bc4 d5 10.Bf6 Bf6 11.c3 Be6 12.Bb3; 7.h3 Nbd7 8.Ne2 d5 9.Bf5 0-0 10.Nbc3 e4 11.Qg3 Nb6 12.Bc8; 7.Qg3 Nbd7 8.Nh3 Nc5 9.Nc3 0-0 10.a4 Nd3 11.cd3 h6 12.0-0) 7...0-0 8.Ne4 Ne4 9.Qe4 f5 10.Qc4 d5 11.Qc3 Bf6 12.Be2.

5.Qf3 Be7 6.Qg3 Nf6 7.Nh3 (7.Nc3 0-0 8.Rb1 Bf5 9.Bd3 Bd3 10.cd3 cb5 11.Nb5 Na6 12.Ne2; 7.h4 0-0 8.Nc3 Nbd7 9.h5 h6 10.Nf3 Nc5 11.Bd3 Qb6 12.a4; 7.Be2 0-0 8.Nc3 Bf5 9.Nh3 cb5 10.Bb5 Nc6 11.d3 Qb6 12.0-0) 7...0-0 8.Nc3 Nbd7 9.bc6 bc6 10.Be2 Nc5 11.Rb1 Rb8 12.d3.

5.Qf3 Be7 6.Nh3 A) 6...Nh6 7.Nc3 (7.Na3 Bg4 8.Qe4 0-0 9.Bd3 f5 10.Qa4 Nd7 11.bc6 Nc5 12.Qc4) 7...Bg4 8.Qe4 0-0 9.Bd3 Bf5 10.Qf3 Bg4 11.Qe4 Bf5 12.Qf3; B) 6...h5 7.Nc3 (7.Qd1 Nf6 8.Nc3 d5 9.Ng5 0-0 10.Be2 Ng4 11.h3 Nf2 12.Kf2; 7.g3 Nh6 8.Qg2 0-0 9.Nc3 d5 10.f4 d4 11.Nd1 Ng4 12.fe5; 7.Qe2 Nd7 8.Nc3 Ngf6 9.bc6 bc6 10.Qf3 d5 11.Ng5 0-0 12.Be2) 7...Nf6 8.Qd1 0-0 9.Be2 cb5 10.Nb5 Nc6 11.Ng5 Ng4 12.Ne4; C) 6...Nf6 7.Ng5 (7.Nc3 0-0 8.Bc4 d5 9.Be2 Bg4 10.Qg3 Be2 11.Ne2 Ne4 12.Qf3) 7...0-0 8.Nc3 d5 9.Qg3 h6 10.Nf3 e4 11.Nd4 c5 12.Nde2.

5.Qf3 Nf6 6.Nc3 A) 6...h6 7.Nh3 (7.Ne4 Be6 8.Nf6 Qf6 9.Qf6 gf6 10.Nf3 Rg8 11.Rg1 Nd7 12.Be2; 7.h3 Be7 8.Nge2 0-0 9.Ng3 d5 10.Nf5 Bf5 11.Qf5 Bd6 12.h4; 7.h4 Be7 8.Qg3 0-0 9.Nf3 Nbd7 10.Bc4 Nb6 11.Bd3 Nh5 12.Qh2; 7.Bd3 d5 8.Bf5 Bd6 9.Nge2 0-0 10.0-0 Nbd7 11.Rab1 Nc5 12.bc6; 7.Qg3 Nh5 8.Qf3 Nf6 9.Nh3 Bg4 10.Qg3 Nbd7 11.f4 a4 12.a3) 7...Bg4 8.Qg3 Nbd7 9.f4 a4 10.a3 Be7 11.Nf2 h5 12.Ng4; B) 6...a4 7.Ne4 (7.a3 Be7 8.Bd3 0-0 9.Qg3 Nbd7 10.Nge2 Nc5 11.0-0 Bd7 12.f4; 7.Nh3 a3 8.Bc1 Be7 9.Ng5 d5 10.Qg3 0-0 11.h4 h6 12.Nf3; 7.h3 a3 8.Bc1 Be7 9.Nge2 0-0 10.Ng3 d5 11.Be2 cb5 12.Nb5; 7.Rb1 Be7 8.Qg3 0-0 9.Nh3 a3 10.Ba1 Nbd7 11.bc6 bc6 12.Be2; 7.Bd3 a3 8.Bc1 d5 9.Qg3 Bd6 10.Qh4 0-0 11.bc6 bc6 12.Rb1) 7...Be6 8.Nf6 Qf6 9.d4 Be7 10.Bd3 Bd5 11.e4 Be6 12.Qf6; C) 6...Qb6 7.Nh3 (7.Qg3 Bd7 8.a4 Be7 9.f4 ef4 10.Qf4 Nh5 11.Qf2 0-0 12.Nf3; 7.Qd1 cb5 8.Bb5 Nc6 9.Nf3 Be7 10.0-0 0-0 11.a4 Na7 12.Qe2; 7.h3 Be7 8.Na4 Qc7 9.Bd3 cb5 10.Bb5 Nc6 11.Ne2 0-0 12.0-0 ; 7.Rb1 Be7 8.Ba3 Bg4 9.Qg3 0-0 10.Nf3 Nbd7 11.bc6 Qc6 12.Bb5; 7.Na4 Qc7 8.Bd3 cb5 9.Bb5 Nc6 10.Nh3 Be7 11.Ng5 0-0 12.0-0) 7...Bg4 8.Qg3 a4 9.Ng5 a3 10.Bc1 h6 11.Nge4 Ne4 12.Ne4; D) 6...Qc7 7.Qg3 (7.Nh3 h6 8.Rb1 Be7 9.Bd3 0-0 10.0-0 Be6 11.Ba3 cb5 12.Rb5; 7.Bd3 Nbd7 8.Ba3 Nb6 9.bc6 bc6 10.Rb1 Be6 11.Nh3 Nc4 12.Bc4; 7.h3 Nbd7 8.Ba3 Nb6 9.bc6 bc6 10.Rb1 Be7 11.Bd3 0-0 12.Nge2; 7.Ba3 Be7 8.Bd3 d5 9.Be7 Qe7 10.Qg3 0-0 11.Nh3 cb5 12.Nb5 ; 7.a4 Be7 8.Nh3 0-0 9.Ng5 Nbd7 10.bc6 bc6 11.Ba3 Nd5 12.h4) 7...Bf5 8.Nf3 Nbd7 9.Bc4 Bc2 10.Rc1 Bg6 11.0-0 Be7 12.Nh4; E) 6...Be7 7.Nh3 (7.Qd1 0-0 8.h4 d5 9.Nf3 e4 10.Ng5 h6 11.Nh3 d4 12.Na4; 7.h3 0-0 8.Nge2 d5 9.Ng3 Bd6 10.e4 d4 11.Na4 cb5 12.Bb5) 7...d5 8.Be2 0-0 9.Qg3 d4 10.Na4 Bd6 11.f3 cb5 12.Bb5.

5.Qf3 Nf6 6.Bd3 Qb6 (6...Bg4 7.Qg3 Nbd7 8.Nc3 Nc5 9.Nf3 Be7 10.bc6 bc6 11.Ng5 Rb8 12.Rb1; 6...Nbd7 7.bc6 (7.Nc3 Nc5 8.bc6 Nd3 9.cd3 Bg4 10.Qg3 bc6 11.Rb1 Rb8 12.Nf3) 7...bc6 8.Nc3 d5 9.Be2 Bd6 10.Qg3 0-0 11.Nf3 Qc7 12.Qh4; 6...Be7 7.Nc3 (7.Ne2 0-0 8.Nbc3 d5 9.Bf5 Bf5 10.Qf5 cb5 11.Nb5 Nc6 12.f4; 7.Nh3 Nbd7 8.bc6 Nc5 9.Nc3 0-0 10.Bb5 Qb6 11.c7 Bg4 12.Qg3) 7...d5 8.Bf5 e4 9.Qh3 Nbd7 10.Nge2 g6 11.Bd7 Bd7 12.Qg3; 6...cb5 7.Bb5 (7.Nc3 Nc6 8.Bb5 Be7 9.Nh3 0-0 10.0-0 d5 11.Qe2 Bf5 12.Ng5) 7...Nc6 8.Nc3 Be7 9.Nge2 0-0 10.h3 Qb6 11.0-0 Be6 12.a4; 6...h6 7.Ne2 (7.Na3 h5 8.Bf5 Bf5 9.Qf5 Qd7 10.Qd7 Nbd7 11.bc6 bc6 12.Nc4; 7.a4 Nbd7 8.Nc3 Nc5 9.bc6 Nd3 10.cd3 Bg4 11.Qg3 bc6 12.Nge2) 7...Bg4 8.Qg3 Nbd7 9.f3 Be6 10.Nbc3 h5 11.Na4 Nb6 12.Nb6) 7.a4 (7.Nc3 cb5 8.Nd5 Nd5 9.Qd5 b4 10.Nh3 Be7 11.f4 Be6 12.Qf3) 7...Be6 (7...Na6 8.Nc3 Nb4 9.Qg3 Nd7 10.Nf3 Nc5 11.0-0 Nbd3 12.cd3) 8.c4 (8.Nc3 Nbd7 9.bc6 bc6 10.Rb1 d5 11.Qg3 g6 12.Qh4) 8...Nbd7 (8...Na6 9.Nc3 Nb4 10.Qe2 Nd3 11.Qd3 Qc5 12.Nf3) 9.Ne2 (9.Nc3 Nc5 10.Qe2 Nd3 11.Qd3 Qc5 12.Nf3) 9...Bg4 (9...Nc5 10.Bc2 Bc4 11.d4 Nd3 12.Bd3) 10.Qg3 e4 (10...h5 11.f3 h4 12.Qf2) 11.Bf6 (11.Bc2 Qc5 12.f3) 11...ed3?? (better is 11...Nf6 12.Bc2 cb5 13.ab5 d5+=) 12.Nf4?? (better is 12.Bd4 c5 13.Qg4 cd4 14.Nd4+/–) 12...Nf6–+ 13.Nd3 Be6 14.Na3 d5 15.c5 Qd8 16.b6 (16.Rc1 Rc8–+) 16...d4 (16...Nd7 17.0-0–+) 17.Ke2 (17.0-0 de3 18.Qe3 Qd7–+) 17...Qd5 18.Qc7 Qg2 (worse is 18...Bc5 19.Nc5 Qc5 20.Qb7–+) 19.Qb7 (19.h3 Bh3 20.Rh3 Qh3 21.Qb7–+) 19...Bg4 0–1. Kaczmarczyk,Przemyslaw – Radzikowski,Dawid (1950), OMTSz Poland, 2010.

5.Qf3 Nf6 6.Be2 A) 6...h5 7.h3 (7.h4 Be7 8.Nc3 0-0 9.Qg3 Bf5 10.Nf3 cb5 11.Bb5 Nc6 12.d3; 7.e4 Nbd7 8.Nc3 Nc5 9.Nh3 Be7 10.0-0 0-0 11.bc6 bc6 12.Rab1) 7...Be7 8.Nc3 0-0 9.g4 cb5 10.Bb5 hg4 11.hg4 Bg4 12.Qb7; B) 6...Qc7 7.Nc3 (7.d4 Be7 8.Qg3 ed4 9.Bd4 0-0 10.Nc3 Be6 11.Ne4 Nbd7 12.b6; 7.Qg3 Bd7 8.Nc3 cb5 9.Bb5 Bb5 10.Nb5 Qc2 11.Bc3 Ne4 12.Qf3; 7.h3 Be7 8.Nc3 0-0 9.Rc1 Nbd7 10.Qg3 Nc5 11.Nf3 Nce4 12.Ne4; 7.e4 Be7 8.Nc3 0-0 9.a4 Nbd7 10.Nh3 Nc5 11.0-0 h6 12.bc6) 7...Be7 8.Bd3 0-0 9.Ba3 d5 10.Be7 Qe7 11.Qg3 cb5 12.Qh4; C) 6...Bg4 7.Qg3 Be2 8.Ne2 cb5 9.Na3 b4 10.Nb5 Nc6 11.f4 Rc8 12.Rd1; D) 6...cb5 7.Bb5 Nc6 8.Nc3 Bg4 9.Qg3 Be7 10.h3 Bf5 11.Qf3 Be6 12.Nge2; E) 6...Be7 7.Nc3 (7.Nh3 Bg4 8.Qg3 h5 9.e4 Be2 10.Ke2 Ne4 11.Qf3 Nc5 12.Na3; 7.a4 h5 8.h3 0-0 9.g4 cb5 10.ab5 Nbd7 11.g5 Ne8 12.Qh5; 7.a3 0-0 8.Nc3 Qc7 9.h4 Nbd7 10.g4 Nc5 11.g5 Nd5 12.Nd5; 7.Qg3 0-0 8.Nc3 Bf5 9.Nh3 cb5 10.Bb5 Nc6 11.0-0 Bc2 12.f4) 7...0-0 8.Nh3 Bg4 9.Qg3 Be2 10.Ke2 cb5 11.Nb5 Qc8 12.Nc3.

5.Qf3 Nf6 6.h3 A) 6...Nbd7 7.Nc3 (7.bc6 bc6 8.Nc3 Rb8 9.Rb1 d5 10.Qd1 Bd6 11.Nf3 0-0 12.Be2) 7...Qc7 8.Qg3 Nc5 9.Nf3 Bf5 10.Bc4 Bc2 11.0-0 Bd3 12.Bd3; B) 6...Qc7 7.Bd3 (7.Nc3 Be7 8.Qg3 0-0 9.Nf3 Nbd7 10.d4 a4 11.Bd3 Qa5 12.0-0; 7.Ba3 Be7 8.Nc3 0-0 9.Nge2 Be6 10.Ng3 Nbd7 11.Bd3 g6 12.bc6) 7...Nbd7 8.Nc3 Nc5 9.Nge2 Be7 10.0-0 0-0 11.Ng3 Nd3 12.cd3; C) 6...a4 7.a3 (7.Nc3 a3 8.Bc1 Be7 9.Nge2 0-0 10.Ng3 d5 11.Be2 Bd6 12.Nh5; 7.Ba3 d5 8.Bf8 Kf8 9.Nc3 Be6 10.Nge2 cb5 11.Nb5 Nc6 12.a3) 7...Be7 8.Nc3 0-0 9.Nge2 d5 10.Ng3 Bd6 11.bc6 bc6 12.Rb1; D) 6...e4 7.Qg3 (7.Bf6 ef3 8.Bd8 fg2 9.Bg2 Kd8 10.Nf3 Be7 11.Nc3 cb5 12.Nb5) 7...g6 8.Nc3 Bg7 9.Rb1 Nh5 10.Qh2 Be5 11.g3 d5 12.Ba3; E) 6...Be7 7.Nc3 (7.Bd3 Nbd7 8.Nc3 d5 9.Qg3 0-0 10.bc6 bc6 11.Rb1 e4 12.Bf1; 7.a4 0-0 8.Ne2 Nbd7 9.Nbc3 d5 10.Ng3 Nc5 11.Nf5 d4 12.ed4) 7...0-0 8.Nge2 d5 9.Ng3 Bd6 10.e4 d4 11.Na4 cb5 12.Bb5.

5.Nf3 Nf6 +=.

6.Nc3 A) 6...Be7 A1) 7.Nf3 0-0 (7...e4 8.Nd4 c5 9.Nde2 d5=; 7...Bf5 8.Be2 0-0 9.0-0 Nbd7=; 7...Nbd7 8.Be2 0-0 9.0-0 d5=; 7...Qc7 8.Be2 0-0 9.0-0 d5=) 8.bc6 Nc6 9.e4 d5+=; A2) 7.Be2 d5 (7...0-0 8.Nf3 e4 9.Nd4 c5=; 7...c5 8.e4 Be6 9.Nf3 0-0=; 7...Be6 8.Nf3 0-0 9.0-0 Nbd7=; 7...Bf5 8.Nf3 0-0 9.0-0 Nbd7=) 8.Nf3 e4 9.Ne5 0-0=; B) 6...d5 B1) 7.Rb1 c5 (7...Bd6 8.bc6 bc6 9.Nf3 0-0+=; 7...d4 8.Nce2 de3 9.fe3 Bd6+=) 8.d4 cd4 9.ed4 e4+=; B2) 7.f4 ef4 8.ef4 Be7 9.Nf3 0-0+=; B3) 7.Nge2 d4 (7...Bd6 8.Ng3 0-0 9.Be2 Be6+=; 7...Be6 8.d4 e4 9.Nf4 Bg4=) 8.ed4 ed4 9.Nb1 Bc5+=; B4) 7.Nf3 Bd6 (7...e4 8.Ne5 Bd6 9.f4 c5+=; 7...Nbd7 8.Be2 Bd6 9.Ba3 Bb4=) 8.bc6 bc6 9.Be2 0-0+=; B5) 7.Be2 Bd6 (7...d4 8.ed4 ed4 9.Nb1 Bc5=; 7...Bf5 8.Nf3 Bd6 9.bc6 Nc6=; 7...Bb4 8.Nf3 Nbd7 9.0-0 0-0=; 7...Be7 8.Nf3 Nbd7 9.0-0 0-0=) 8.bc6 bc6 9.Nf3 0-0+=; B6) 7.bc6 Nc6 8.Rb1 Bc5 9.Nb5 Qe7+=.

6.c4 cb5 A) 7.cb5 Be6 (7...Be7 8.d4 e4 9.d5 0-0=; 7...Bf5 8.d4 Nbd7 9.Nc3 e4=) 8.d4 e4 9.Ne2 d5=; B) 7.ab5 Be6 (7...Be7 8.d4 e4 9.Nd2 0-0=) 8.d4 ed4 9.ed4 d5=.

6.c4 Qb6 A) 7.Qc2 Be7 (7...Nbd7 8.d4 Be7 9.Nf3 e4=; 7...Be6 8.d4 Nbd7 9.Nf3 ed4=; 7...cb5 8.ab5 Be7 9.d4 Qc7=) 8.d4 ed4 9.Bd4 c5=; B) 7.d4 e4 8.Nd2 Bf5 9.Ne2 Be7=.

6.c4 c5 7.Nc3 Be6 8.d3 Nbd7 (8...d5 9.cd5 Nd5 10.Nd5 Qd5 11.Be2=) 9.Nge2 (9.Nf3 Be7=) 9...g6 (9...Rb8 10.g3=) 10.g3 Bg7 11.Bg2 Qc7 12.0-0 0-0 13.Rc1 Rad8 14.Nd5 Bd5 15.cd5 Nb6 16.Qb3 Qe7 17.d4 (better 17.Bc3 Ra8 18.e4+=) 17...ed4-/+ 18.ed4? (better 18.Nf4!? g5 19.Nh3=+) 18...Qe2-+ 19.Rfe1 (19.dc5 dc5 20.Rc5 Rfe8-+) 19...Qg4 20.dc5 dc5 21.Rc5 (21.Bf6 Bf6 22.Rc5 A) 22...Na4?! 23.Rc4 Nc5 24.Rc5= (24.Rg4?? Nb3 25.Ra4 b6-+); B) 22...Rd7-+) 21...Qa4 (21...Na4?! 22.Rc4 Nb2 23.Rg4 Ng4 24.Rb1-+) 22.Qf3 (22.Qa4 Na4 23.Bf6 Nc5 24.Bd8 Rd8-+) 22...Qb4 23.Bf6 (23.Qc3 Nbd5 24.Bd5 Qc3 A) 25.Bc3?? Nd5 (worse 25...Rd5 26.Rd5 Nd5 27.Ba5-+) 26.Bg7 Kg7-+; B) 25.Bf7 Rf7 26.Rc3-+) 23…Qe1 (23...Qe1 24.Bf1 Bf6 25.Qf6 Nd5-+) 0-1. dodi65 (1975) - vweketerayn (1935), Rated Blitz game, lichess.org, 2013.

6.c4 Qc7 A) 7.d4 Be7 (7...Bf5 8.Ne2 Be7 9.Ng3 Be6=) 8.Nd2 0-0 9.Bd3 ed4=; B) 7.Nc3 Be7 8.Be2 0-0 9.Nf3 Nbd7=.

6.c4 Be6 7.d4 ed4 8.Qd4 =.

6.c4 Be6 7.Be2 e4 (7...cb5 8.ab5 Qc7 9.Nf3 Nbd7=; 7...Nbd7 8.d4 e4 9.Nd2 Be7=; 7...Be7 8.Nf3 cb5 9.ab5 0-0=; 7...Qc7 8.Nc3 d5 9.cd5 Nd5=) 8.Nc3 d5 9.bc6 dc4=.

6.c4 Be6 7.Nf3 Nbd7 (7...Be7 8.Be2 cb5 9.ab5 Qc7=; 7...cb5 8.ab5 Be7 9.Be2 Qc7=; 7...Bg4 8.h3 Bf5 9.Be2 Be7=) 8.d4 e4 9.Nfd2 Be7=.

6.bc6 bc6 A) 7.Nf3 Nbd7 (7...Be7 8.Nc3 0-0 9.Rb1 Nbd7+=; 7...Qb6 8.Bc3 Be7 9.Be2 0-0=; 7...Na6 8.Nc3 Rb8 9.Rb1 Be7=) 8.Nc3 Rb8 9.Rb1 d5+=; B) 7.Nc3 Nbd7 (7...d5 8.Rb1 Bd6 9.Nf3 0-0+=; 7...Be7 8.Rb1 0-0 9.Nf3 Bg4=; 7...Bf5 8.Rb1 Be7 9.Nf3 0-0+=; 7...Na6 8.Rb1 Nb4 9.e4 Be7=) 8.Rb1 Rb8 9.Be2 d5+=; C) 7.Na3 Na6 (7...Nbd7 8.Nc4 Qc7 9.f4 ef4+=; 7...Be7 8.Rb1 0-0 9.d4 Nbd7+=; 7...Bf5 8.Be2 Nbd7 9.Nc4 Be6+=) 8.d4 Rb8 9.de5 Rb2+=; D) 7.Be2 Nbd7 (7...Be7 8.Nf3 0-0 9.Nc3 Nbd7+=; 7...Na6 8.Nc3 Be7 9.Rb1 Nb4=) 8.Nc3 d5 9.Rb1 Rb8+=; E) 7.Ne2 Nbd7 (7...Be6 8.Nbc3 Nbd7 9.Rb1 Rb8+=; 7...Na6 8.Nbc3 Rb8 9.Rb1 d5+=; 7...Be7 8.d4 Nbd7 9.Nd2 0-0+=) 8.Nbc3 Rb8 9.Rb1 d5+=; F) 7.d4 Nbd7 (7...e4 8.Nd2 Be7 9.Rb1 0-0+=) 8.Nd2 e4 9.Rb1 d5+=.

6.d4 e4 A) 7.Be2 Be7 (7...d5 8.Ba3 Ba3 9.Ra3 0-0=; 7...Bf5 8.Nd2 Be7 9.g4 Bg6=; 7...Bd7 8.c4 Be7 9.Nc3 0-0=; 7...Be6 8.c4 Nbd7 9.Nd2 d5=) 8.c4 0-0 9.Nc3 d5=; B) 7.Ne2 d5 (7...Be7 8.d5 cb5 9.ab5 Nbd7=; 7...cb5 8.ab5 d5 9.Ba3 Ba3=; 7...Bd7 8.bc6 bc6 9.Nd2 d5=; 7...Qb6 8.Nf4 Bg4 9.f3 Bd7=) 8.Ba3 Ba3 9.Ra3 0-0+=; C) 7.Nd2 Be7 (7...d5 8.Ba3 Bg4 9.Be2 Ba3=; 7...Be6 8.c4 d5 9.bc6 Nc6=; 7...Bf5 8.Ne2 d5 9.Ng3 Bg4=) 8.c4 0-0 9.d5 cd5=; D) 7.bc6 bc6 8.Nd2 Be7 9.Rb1 0-0=; E) 7.c4 Be7 (7...d5 8.Ba3 Ba3 9.Na3 0-0=; 7...Nbd7 8.d5 cd5 9.cd5 Be7=) 8.Nc3 0-0 9.d5 cb5=.

6.Be2 Be7 7.Nc3 d5 (7...0-0 8.Nf3 e4 9.Nd4 c5=; 7...Bf5 8.Nf3 0-0 9.0-0 Nbd7=; 7...Nbd7 8.Nf3 0-0 9.0-0 d5=; 7...cb5 8.ab5 0-0 9.Nf3 Nbd7=) 8.Nf3 Nbd7 9.0-0 0-0=.

6.Be2 Be7 7.Nf3 0-0 8.0-0 (8.Nc3 Be6=) 8...Nbd7 (8...cb5 9.ab5 Nbd7 10.c4=) 9.c4 e4 (9...cb5 10.cb5 Nb6 11.Nc3=) 10.Nd4 Ne5 11.f4 ef3 12.Nf3 Nf3 13.Bf3 Be6 14.Qe2 (14.Qc2 Rc8=) 14...d5 15.cd5 Bd5 16.Bd4 (16.Bd5 Qd5 17.Nc3 Qd7=) 16...c5 17.Be5 Bf3 (17...c4 18.Nc3 Bf3 19.Qf3=) 18.Qf3 Qd5 19.Qd5 Nd5 20.Na3 (20.Nc3 Rfd8=) 20...f6 21.Bg3 Nb6 (21...Rfd8 22.Nc4+=) 22.Rac1 (22.Rfc1 f5= (22...Na4? 23.Nc4+–)) 22...Rac8 (22...Na4 23.Nc4 h5 24.Ra1+–) 23.Nc4= Nc4 (23...Na4? 24.Ra1 (24.Na5?! Rfd8=) 24...Nb6 25.Nb6+–) 24.Rc4 Rfd8 25.Rd1 (25.d4 cd4 26.Rc8 Rc8 27.ed4 Rc4+=) 25...Kf7 26.d3 f5 27.Kf2 Bf6 28.Ke2 b6 (28...Ke6 29.Re1=) 29.Rf1 (29.e4 Re8=) 29...Ke6 (29...g6 30.e4=) 30.e4 (30.Rcf4 g6=) 30...g6 31.Bh4 (31.Bf4 Re8=) 31...h5 (31...Rd4 32.Bf6 Kf6 33.Rd4 cd4 34.Kd2=) 32.h3 (32.Bf6 Kf6 33.Rf4 Re8=) 32...Rd4 (32...Bh4 33.ef5 gf5 34.Rh4=) 33.Bf6 Rc4 (33...Kf6 34.ef5 gf5 35.g4 Re8 36.Kd2 hg4 37.hg4=) 34.dc4+= Kf6 35.ef5 gf5 (35...Re8 36.Kd3 gf5 37.g4=) 36.g4 Re8 37.Kd2 hg4 (37...Re5 38.Kd3=) 38.hg4+= Re5 39.Kd3 Ke6 40.Rf4 (40.g5 Kf7 41.Rh1 f4=) 40...fg4 ½–½. Benassi,Aspasio – Solare,Juan, Orang–Utan Invitational, 2001.

6.Be2 Be7 7.Nf3 0-0 8.0-0 e4 9.Ne1 d5=.

6.Be2 Be7 7.Nf3 Nbd7 8.0-0 0-0 9.c4 Nb6=.

6.Be2 Be7 7.Nf3 e4 8.Nd4 c5 9.Nb3 Be6=.

6.Be2 Be7 7.Nf3 Bf5 8.Nc3 0-0 9.0-0 Nbd7=.

6.Be2 Be7 7.Nf3 Bg4 8.0-0 0-0 9.Nc3 Nbd7=.

6.Be2 Bf5 7.Nf3 Be7 8.0-0 0-0 9.c4 cb5=.

6.Ne2 A) 6...Be6 A1) 7.d4 Nbd7 (7...Qc7 8.Ng3 Be7 9.Bd3 0-0=) 8.Ng3 h5 9.h4 Be7=; A2) 7.Nec3 d5 (7...Qb6 8.Be2 d5 9.0-0 d4=) 8.d4 ed4 9.Qd4 Bb4+=; A3) 7.Na3 Nbd7 (7...Be7 8.d4 Nbd7 9.Ng3 ed4+=; 7...cb5 8.Nb5 Be7 9.d4 Nc6=) 8.Rb1 d5 9.f4 Bb4+=; A4) 7.Ng3 Be7 (7...Nbd7 8.d4 h5 9.h4 Be7=) 8.Be2 0-0 9.0-0 Nbd7=; B) 6...Nbd7 7.Ng3 d5 (7...Be7 8.Be2 0-0 9.0-0 Nb6=; 7...Qc7 8.Be2 d5 9.0-0 Bb4=; 7...Nb6 8.Be2 Be6 9.0-0 Nc4=; 7...h5 8.h4 d5 9.Be2 g6=) 8.Be2 Bb4 9.0-0 0-0=; C) 6...Be7 C1) 7.Nec3 0-0 (7...d5 8.d4 e4 9.Be2 0-0+=; 7...Be6 8.Be2 d5 9.d4 e4=; 7...Qb6 8.Bd3 0-0 9.0-0 d5+=) 8.Be2 d5 9.d4 e4+=; C2) 7.Nbc3 0-0 (7...Be6 8.Ng3 0-0 9.Be2 d5=; 7...Bg4 8.f3 Be6 9.d4 0-0+=; 7...cb5 8.Nb5 0-0 9.d4 Nc6=; 7...Bd7 8.f4 0-0 9.Rb1 cb5+=) 8.Rb1 cb5 9.Nb5 Nc6+=; C3) 7.f4 Nbd7 (7...cb5 8.ab5 Nbd7 9.Na3 0-0+=; 7...e4 8.Ng3 0-0 9.Be2 d5=; 7...Qc7 8.Na3 0-0 9.Rb1 Bg4+=) 8.Na3 0-0 9.Nc4 ef4+=; C4) 7.Ng3 0-0 (7...Be6 8.d4 ed4 9.Qd4 Nbd7=; 7...Qc7 8.Be2 0-0 9.0-0 cb5=; 7...Bd7 8.Be2 cb5 9.ab5 0-0=; 7...Qb6 8.d4 ed4 9.Qd4 Qd4=) 8.d4 Qc7 9.Bd3 Bg4=; C5) 7.d4 Qc7 (7...e4 8.d5 cb5 9.ab5 Nbd7=; 7...Nbd7 8.Ng3 0-0 9.Bd3 ed4=) 8.Ng3 0-0 9.Bd3 Bg4=.

6.Nf3 c5 7.d3 Be6 (7...Be7 8.Be2 Qb6 9.Nbd2 0-0=; 7...Bg4 8.Be2 Be7 9.0-0 0-0=; 7...Nbd7 8.c4 Be7 9.Be2 Qc7=; 7...Qd7 8.Be2 Be7 9.0-0 0-0=) 8.Be2 Be7 9.Ng5 Bf5=.

6.Nf3 Nbd7 7.Be2 e4 8.Nd4 c5 9.Nb3 d5 10.Nc3 Bd6 11.d3 ed3 12.cd3 (worse is 12.Bd3 c4 13.Bc4 dc4 14.Qd6 cb3 15.cb3 Qb6–/+; 12.Qd3? c4 13.Qd1 cb3 14.cb3 Nb6–+) 12...0-0 13.0-0 (13.Bf3 Nb6=) 13...Nb6 Black prepares the advance c4 (13...Qe7 14.Bf3=) 14.Qc2 (14.Ba3 Qc7 15.Kh1 d4 16.ed4 cd4=) 14...Re8 15.Rfe1 Bf5 16.Qd2 (16.Rac1 Qc7 17.h3 Qe7+=) 16...c4 (16...Qe7 17.Nd1+=) 17.Nd4= Bg6 18.Rac1 (18.Red1 Qc7 19.h3 Rac8 20.dc4 Nc4 21.Bc4 dc4+=) 18...Bb4 19.Qc2 (19.Qd1 cd3 20.Bd3 Bd3 21.Qd3 Bc3 22.Bc3 Na4+=) 19...Nfd7 20.e4 (better is 20.Qd1!?+=) 20...cd3–/+ 21.Bd3 Nc5 22.Nb3 (better is 22.Rcd1–/+) 22...de4 (22...Nd3?! 23.Qd3 de4 24.Qg3–/+) 23.Be4 Ne4 24.Re4 Re4 (worse is 24...Be4 25.Ne4 Rc8 26.Nbc5–+) 25.Ne4 Rc8 (25...Na4?! 26.Bd4 Qd5 27.f3 Qb5 28.Qa2–+) 26.Qe2 Rc1 (26...Rc1 27.Bc1 Be4–+; 26...Na4?! 27.Rc8 Qc8 28.Ng3–+) 0–1. soltpl (2045) – pvanr (2325), gameknot.com, 2016.

6.Nf3 e4 7.Nd4 c5 (7...d5 8.Be2 Bd6 9.bc6 bc6=) 8.Ne2 Be7 9.d3 ed3=.

6.Nf3 Be7 7.d4 (7.Be2 e4 8.Nd4 c5 9.Nb3 Be6=) 7...e4 8.Nfd2 0-0 9.Be2 cb5 (9...d5=) 10.ab5 d5 11.c4 dc4 12.0-0 Be6 13.Bc4 Bc4 14.Nc4 Re8 15.Qb3 Nbd7 16.Rd1 b6? (better is 16...Ng4=) 17.Ne5+– Ne5? (better is 17...Bb4 18.Qf7 Kh8+–) 18.de5 Nd7 (18...Qc8 19.ef6 Bf6 20.Bf6 gf6 21.Nc3+–) 19.e6 (19.e6 Kh8 20.ed7+–) 1–0. aspasio – ziggyblitz, net–chess.com, 2012.

6.f4 ef4 A) 7.bc6 bc6 (7...fe3 8.cb7 Bb7 9.de3 Nd5+=) 8.ef4 Be7 9.Nc3 0-0+=; B) 7.ef4 Be7 8.Bd3 0-0 9.Ne2 d5+=.

6.h3 Be7 7.c4 Bd7 8.c5 (8.d4 e4=) 8...d5 (8...0-0!?–/+) 9.Be5= cb5 10.ab5 Bc5 11.d4 Bb4 12.Nd2 Ne4 13.Ngf3 f6 14.Bh2 0-0 15.Be2 (15.Qb3 Bf5=) 15...Bc3 16.Ra3 Bb4 17.Ra2 (17.Qb3!? Nd2 18.Nd2=) 17...Nc3 18.Qb3 Na2 (18...Qb6!?–+) 19.Qd5=+ Kh8 20.Qa2 Qe7 21.0-0 Be6 22.Bc4 Bc4 23.Nc4 Nd7 24.Bc7 White prepares b6. Pawn a5, live or die! 24...Qe6 25.b6 Ra6 26.Rb1? (better 26.Rd1!?=+) 26...Nb6 27.Nb6?? (better 27.Bb6 Rb6 28.Rd1–+) 27...Qa2 (27...Rb6?? 28.d5 Qe7 29.Bb6+–) 28.Rc1 (28.Rf1 Rf7 29.Bd8 Bd6–+) 28...Qb2 (28...Ba3 29.Rc4–+) 29.Rc4 (29.Rf1 Qb3–+) 29...Qb1 30.Kh2 Bd6! 31.Bd6 Qb6 (better 31...Re8 32.Nc8–+) 32.Bf8 a4 (better 32...Ra8 33.Be7 Kg8–+) 33.Bc5?? (33.Rc8 Qe6 34.Rb8–+) 33...Qb5 (better 33...Qc7 34.g3 a3 35.Nd2–+) 34.Rc2 a3 (better 34...Qb3 35.Rc1 h6–+) 35.Ba3 Ra3?? (better 35...h5 36.Bc5 Qd7–+) 36.Rc8 (36.Rc8 Qe8 37.Re8) 1–0. b4_Bb2 (1770) – marcelo_monteiro (1700), lichess.org, 2020.

7.Nc3 Be7 (7...d5 8.Nf3 e4 9.bc6 bc6=; 7...Nb6 8.Nf3 e4 9.Ng5 d5=) 8.Nf3 0-0 9.d4 e4=.

7.d4 ed4 8.Bd4 Nc5 (8...d5 9.cd5 Bb4 10.Nd2=) 9.Nf3 Be7 (9...Ne6 10.Bc3+=) 10.Be2 Bf5 11.0-0 0-0 12.Nc3 (12.Ra2 Ne6=) 12...Nfd7 (12...Re8 13.Ra2=) 13.Bc5 (13.Ra2 Bf6=) 13...dc5 (13...Nc5!? 14.Nd4 Bd7=) 14.bc6+= bc6 15.Bd3 Bg4 (15...Bd3 16.Qd3 Nb6 17.Qe4=) 16.Qc2 g6 17.Be2 Qc7 18.Rab1 Rfb8 19.Rfd1 Be6 20.Ne4 Rb4 Attacking the isolated pawn on c4 21.Neg5 Bf5 22.e4 Bg4 23.h3 Bf3 24.Nf3 Nb6 Exerts pressure on the isolated pawn 25.Ra1 Bf6 26.Ra2 Bg7 27.g3 Re8 (27...Rb8 28.Nd2=) 28.Kg2 Kf8 29.Nd2 f5 30.Bd3 f4 31.g4 (31.Nf3 Kg8=) 31...Qf7 The pressure on the isolated pawn grows 32.f3 (32.g5 Kg8+=) 32...Qe7 (32...Qf6 33.Nf1+=) 33.Nf1 (33.Be2 Qh4 34.Nf1 Bd4–/+) 33...Na4 (33...Kg8 34.Nd2–/+) 34.Rd2+= (worse is 34.Ra4 Rb2–/+) 34...Nc3 Black gets the initiative 35.Ra5 Nb1 36.Rf2 Qd7 37.e5 (37.Nh2!?+=) 37...Be5–/+ (37...Re5?! 38.Qc1 Qb7 39.Rfa2+= (worse is 39.Qf4 Kg8=)) 38.Be4 Bd4 (38...Reb8 39.Qd3 Qd3 40.Bd3–/+) 39.Qd3 Qd8 40.Rfa2 Nc3 41.Qd2 (41.Ra8 Qa8 42.Ra8 Rb2 43.Kh1 Ra8 44.Bg6 hg6 45.Qg6–+) 41...Na2 (41...Na2 42.Qf4 Kg7 43.Ra2 Rc4 44.Bc6 Re1–+) 0–1. Milde,Lars (1725) – Luzuriaga,Norberto Horacio (1700), TT–01.01, 2002.

7.d4 Be7 8.Nf3 e4 9.Nfd2 d5=.

7.Be2 d5 (7...cb5 8.cb5 d5 9.d4 Bb4=; 7...Be7 8.Nf3 cb5 9.ab5 e4=; 7...Rb8 8.Nf3 Be7 9.0-0 0-0= ; 7...Nb6 8.d4 e4 9.Nd2 Bf5=) 8.cd5 cd5 9.d4 Bb4=.

7.Ne2 cb5 (7...Be7 8.d4 0-0 9.Ng3 ed4+=; 7...Nb6 8.Ng3 Be6 9.d3 Qc7+=) 8.ab5 d5 9.Nec3 dc4+=.

7.Nf3 e4 8.Nd4 Ne5 9.d3 Bg4=.

7.Qc2 0-0 (7...cb5 8.ab5 0-0 9.d4 e4=; 7...Nbd7 8.d4 cb5 9.ab5 ed4=; 7...c5 8.d4 ed4 9.ed4 0-0=; 7...Be6 8.d4 ed4 9.Bd4 Nbd7=) 8.d4 ed4 9.Bd4 Nbd7=.

7.Nc3 0-0 8.d4 Qb6 9.Nf3 e4=.

7.Nc3 0-0 8.Nf3 (8.d4 Be6+=) 8...Nbd7 (8...e4 9.Ng5 d5 10.d3+=) 9.Be2 e4 10.Nd4 Ne5 11.f4 (11.Qc2 c5 12.Nb3 Bf5=) 11...ef3 12.Nf3 Be6 13.Ne5 de5 14.0-0 Qb6 15.Qc2 Rfd8 16.Rad1 Rac8 17.Kh1 Qc7 18.h3 Bb4 (18...Qd7=) 19.bc6 (19.d4 ed4 20.ed4 Qg3=) 19...Qc6+= (worse is 19...bc6 20.Ne4 Ne4 21.Qe4=) 20.d3 Qb6 21.Rf3 h6 (21...Rd7 22.Qb3+=) 22.Rb1 Qa6 23.Nb5 (23.Rbf1 e4 24.Rf6 ed3 25.Bd3 gf6 26.Rf6 Rd3 27.Qd3 Qc4 28.Qc4 Rc4–/+ (worse is 28...Bc4 29.Rh6 Rc6 30.Rh5+=)) 23...e4 24.Rf6 (24.Rf2 ed3 25.Bd3 Nd7=) 24...ed3 (24...gf6 25.Bf6 ed3 26.Bd3=) 25.Bd3 gf6 26.Bf6 Rd3 (26...Rd7 27.Bd4=) 27.Qd3 Bf8 (27...Bh3 28.Qf1 Rc6 29.Bb2=) 28.e4+= Bc4 (28...Rc4 29.Nc3+=) 29.Qg3+/– Kh7 30.e5 Bb5 31.ab5 Qe6 32.Qd3 (32.Rd1 Qf5+/–) 32...Kg8 33.Rf1 (33.Rd1 Be7 34.Qg3 Kf8 35.Qg7 Ke8 36.Qh6 a4+/–) 33...Bb4 (33...Qc4!? 34.Qf5 Qe6+/–) 34.Qe3+– Kh7 (34...Bf8 35.Ra1+–) 35.Qe4 Kg8 36.Qb7 Rc3 (36...Kf8 37.Rb1+–) 37.Rf3 Rf3 38.Qf3 (38.gf3?? Qh3 39.Kg1 Bc5) 38...Bf8 39.Qe3 (39.Qa8 Qa2 40.Kh2 Qa4+–) 39...Qc4 (39...a4 40.b6 Qd5 41.Qg3 Kh7 42.Qc3+–) 40.Qg3 Kh7 41.b6 Qd5 (41...a4 42.b7 Qb5 43.Qf3+–) 42.Qc3 (42.Qf3 Qf3 43.gf3 Bc5+–) 42...Bc5 (better is 42...Bb4 43.Qg3 Bf8+–) 43.Qc2 Kg8 44.b7! Qb7 45.Qc5 Qb4 (45...Qb1 46.Kh2 Qb4 47.Qc8 Kh7 48.Qh8 Kg6 49.Qg8 Kf5 50.Qf7 Qf4 51.Kg1 Qe3 52.Kf1 Qc1 53.Ke2 Qc2 54.Kf3 Qd3 55.Kf2 Qd2 56.Kf3 Qd3 57.Kf2 Qd2 58.Kf3 Qd3=) 46.Qc8 Kh7 (46...Qf8 47.Qg4 Kh7 48.Qf5 Kg8 49.e6+–) 47.Qh8 Kg6 48.Qg7 Kf5 49.Qf7 Ke4 (49...Qd2 50.Qh7 Ke6 51.Qg8 Kd7 52.Qd8 Kc6 53.Qd2+–) 50.e6 (50.Qg6 Kd5+–) 50...Qb1 51.Kh2 Qb8 52.g3 Qb3 53.Qg6 Kd5 (53...Kf3 54.Qg4 Ke3 55.Qd4 Kf3 56.Qf4 Ke2 57.e7+–) 54.Qf5 (better is 54.e7 Qb8 55.Qf5 Kc6 56.Qa5+–) 54...Kd6 55.Qe5 Kc6 56.Qe2 1–0. Solare,Juan – Luzuriaga,Norberto Horacio, Orang–Utan Invitational, 2001.

7.Nc3 b6 8.Nf3 e4 9.Nd4 c5=.

7.Nc3 Bd7 8.d4 0-0 9.Qd3 Be6=.

7.Nc3 Nbd7 8.Nf3 e4 9.Nd4 Ne5=.

7.Nc3 Be6 8.Nf3 0-0 9.Be2 cb5=.

7.d4 e4 (7...Nbd7 8.Nf3 e4 9.Nfd2 0-0=; 7...ed4 8.Bd4 0-0 9.Bd3 c5=) 8.Nc3 0-0 9.d5 cb5=.

7.Be2 0-0 8.d4 e4 9.Nc3 d5=.

5.Nc3 d5 6.Nf3 c5 7.Ne5 fe5 8.Qh5 g6?? (better is 8...Ke7 9.Qe5 Be6=) 9.Qe5+– Ne7 10.Be2 (better is 10.Qh8 Bf5 11.Qh7+–) 10...Rg8–/+ 11.Qg3 b6 12.Bf3 Bb7 13.0-0 Nf5 (13...Bg7 14.Rae1+=) 14.Qf4 (better is 14.Qe5!? Ne7 15.Qg3=) 14...Bd6–/+ 15.Qg4 Bc7 16.d4 Nd7 (better is 16...h5 17.Qh3 Bc8 18.Bd5 Nd4+=) 17.e4?? (better is 17.Nd5 cd4 18.ed4+=) 17...Nf6 (17...Nd4 18.ed5 Ne5 19.Rae1–+) 18.Qg5? (better is 18.Qh3 de4 19.Rfe1–/+) 18...h6 (worse is 18...Ne4 19.Qd8 Rd8 20.Be4 de4 21.dc5 bc5 22.Rae1–+) 19.Qf4 (19.Qc1 de4 20.Re1–+) 19...Bf4 20.ed5 (20.ef5 gf5 21.Ne2–+) 20...Nd4 21.Na4 Nf3 22.gf3 Qd5 23.Rae1 Kf7 24.Nb6 Qf3 25.Na8 Qg2 0–1. anglewolf – shakattack, ChessWorld.net, 2011.

5.Bd3 Nh6= 6.f4 ef4 7.Qh5 Nf7 8.ef4 Qe7 (8...d5 9.Ne2=) 9.Ne2+= Qc5 10.Bd4?? (better 10.Qf3 d5 11.Bd4+=) 10...Qh5–+ 11.Nbc3 Be7 (11...Qh4 12.Bf2 Qg4 13.h3–+) 12.Na4 (12.0-0 Bc5–+) 12...Bd8 13.0-0 cb5 14.Nac3 0-0 15.Ng3 Qg4 16.Bf5 Qh4 17.Bc5 d6 (17...b4 18.Nb5–+) 18.Bc8 dc5 (18...dc5 19.Nf5 Qh5–+) 0–1. Stevens – Myrberg,Johnny, email 4AMM–04, 1997.

5.d4 e4 +=.

5.Nf3 d5 6.c4 Be6 7.bc6 bc6 8.Nc3 Na6 9.cd5 cd5 0–1. Ogopogoman – shakattack, ChessWorld.net, 2011.

5.Nf3 d5 6.d4 e4 7.Nh4 g5 (better 7...Nh6!? 8.bc6 bc6=+) 8.Qh5+= Ke7? (better 8...Kd7 9.Ng6 Bb4 10.c3 Qe8 11.cb4 Qg6 12.Qg6 hg6 13.bc6 Nc6+–) 9.Ng6!+– hg6 10.Qh8 Nh6 (10...Be6 11.Qh7 Bf7 12.Ba3 Ke6 13.Qh3 f5 14.Bf8 Qf8 15.Qg3+–) 11.Qh7 Kd6 (11...Nf7 12.Qg6 Ke8 13.h4 gh4 14.Rh4+–) 12.Ba3 Ke6 13.Qg6 Ba3 14.Na3 (14.Qh6 Bb2–/+) 14...Nf5 15.Be2 (15.c4 Qf8 16.Nb1 Qh8+–) 15...Kd6?! (15...Nh4 16.Qh6 Ng2 17.Kd1+–) 16.0-0 (16.c4 Be6+–) 16...Bd7 (16...Be6 17.c4+–) 17.c4 Nh4 (17...Qf8 18.bc6 bc6 19.Rab1+–) 18.c5 (better 18.Qf7 Qe8 19.Qf6 Qe6+–) 18...Kc7 19.b6 (19.Qh7!? Nf5+–) 19...Kc8 20.Qh5 (20.Qf7 Na6+–) 20...Be8 (20...Be6+–) 21.Bg4?? (21.Qh8 Bd7 22.Qd8 Kd8+–) 21...Nd7?? (better 21...f5 22.Bf5 Nf5+=) 22.Qh8 (22.Qh6 f5 23.Be2 Bf7+–) 22...Ng6 (22...f5 23.Be2+–) 23.Qh3 Nh4 24.g3 Nf3 25.Bf3 ef3 26.Qg4 Kb8 27.Qf3 Bg6 28.Rae1 (28.g4 Kc8+–) 28...Qh8? (28...Bd3+–) 29.e4! de4 (29...de4 30.Qg4 Decoy; 29...Be4 30.Qe3 Combination) 30.Re4 Be4 (30...Qd8 31.Rfe1 Be4 32.Re4 Nb6 33.cb6 Qb6 34.Qf6+–) 31.Qe4 Qh7 (31...Qd8+–) 32.Re1 (32.Qe8) 32...Qe4+– 33.Re4 (33.Re4 Nb6 34.cb6+–) 1–0. OnlyPolishOpening (1715) – abdulz (1675), lichess.org, 2020.

4.a4 d5 5.d4 Bd7 6.Ba3 Ba3 7.Na3 Nf6 8.Nf3 cb5 9.Bb5 Bb5 10.Nb5 Na6 11.c3 0-0 12.0-0 Rc8 13.Qb3 Ne4 The backward pawn on c3 becomes a target 14.Rfc1 Qd7 15.c4 Rc4 16.Rc4 dc4 17.Qc4 Rc8 18.Qd3 Qd5 19.Nd2 (19.Qd1!?=) 19...Nac5+= 20.Rc1 (20.dc5 Qd3 Pinning (20...Qd3 Deflection)) 20...Rc6 (20...Nd3?? 21.Rc8 Qd8 22.Rd8) 21.Qe2 Na4 (21...Na4 22.Rc6 Qc6 23.Ne4 Qe4–/+) 0–1. HFlew – ddddale, playchess.de, 2003.

4.Bb2 d5 5.Nf3 Nf6 6.c4 cb5 7.cb5 a4 8.Qc1 Bd6 9.Be2 0-0 10.0-0 b6 11.Ne5 Bb7 0–1. luminarydebris (1935) – pcmvr (2845), net–chess.com, 2011.

4.Bb2 d5 5.Nf3 Nf6 6.Be2 cb5 7.Bb5 Bd7 8.Qe2 Bd6 9.0-0 0-0 10.a4 Bb5 11.Qb5 Na6 12.Bd4 (12.Qb7? Nc5 13.Qc6 Rc8 14.Bf6 Bh2 (14...Rc6 15.Bd8 Rd8 16.Nc3+=; 14...Qf6?! 15.Qd6 Qa1 16.Nc3–/+) 15.Kh2 Qf6–+ (15...Rc6? 16.Bd8 Rd8 17.Nc3+–)) 12...Rc8 13.Bb6 Qe7 14.Nc3 Nb4 15.Nd4 Ng4 16.Qe2?? (better is 16.h3 Ne5 17.Ba5 (worse is 17.Qa5 Nc4 18.Qb5 Nd2–/+) 17...Nc2 18.Nc2+=) 16...Bh2–+ (16...Nh2?! 17.Rfb1+=) 17.Kh1 Qh4 18.Nf3 Qh5 19.Bd4 (19.g3 Bg3 20.Kg2–+) 19...e5 20.Bb6 Bf4 21.Kg1 Rc6 22.Ba5 (22.g3–+) 22...Rh6 (22...Rh6 23.Nh4 Qh4 24.Qg4 Qh2) 0–1. birdmove (2250) – pcmvr (2850), net–chess.com, 2011.

4.Bb2 Nf6 5.Nf3 d5 6.Be2 Bd6 7.0-0 =.

4.Nc3 Bb4 5.Qg4 Bc3 6.dc3 Qf6 7.Bb2 d5 (7...cb5 8.Bb5 h5 9.Qe2+/–) 8.Nf3+/– Ne7 9.0-0-0 0-0 (9...e5 10.Qg3 Nd7 11.c4+/–) 10.c4 Qg6 11.Qg6 Ng6 12.h4 Ne7 13.Bd3 Nd7 14.e4 de4 (14...Nc5 15.Ba3 Nd3 16.cd3+/– (16.Rd3?! de4 17.Be7 Re8=)) 15.Be4 Nc5 (15...Nf6 16.Bd3+/–) 16.Bc6 bc6 17.Ba3 Ne4 18.Rhe1 Nf2 (18...Nc3 19.Be7 Nd1 20.Bf8+– (worse is 20.Kd1 Re8 21.Ba3 cb5 22.cb5 Bb7+=; 20.Rd1?! Re8+=)) 19.Rd2+– (19.Be7?! Nd1 20.Bf8 Nc3=) 19...Re8 20.Be7 cb5 21.Bd6 (worse is 21.Rf2 Re7 22.cb5 Bb7+/–) 21...Ng4 22.cb5 f6 23.Nd4 e5 24.b6 Nh6 25.Bc7 a4 26.c4 Bb7 (26...Ba6 27.Nb5 Nf5 28.Nd6 Nd6 29.Rd6+–) 27.Nb5 Nf7 (27...Nf5+–) 28.Kb2 Ra5 (28...e4 29.Kc3+–) 29.Ka3 Re6 (29...Rea8 30.Kb4+–) 30.Kb4 Ra8 31.c5 Re7 32.Nd6 Nd6 (32...Bc6 33.Nf5 Ree8 34.a3+–) 33.Rd6 (33.Bd6?! Rd7+–; 33.cd6?! Rd7+–) 33...Bg2 34.Rg1 Be4 (34...Bf3 35.Rf6 Be4 36.c6+–) 35.c6 1–0. gtate (2475) – huimre (2610), net–chess.com, 2007.

4.Nc3 Nf6 5.Nf3 +=.

4.Nc3 Nf6 5.f4 Bc5 6.Nf3 d5 7.Na4 Be7 8.c4 0-0 9.Rb1 Bd7 10.c5 cb5 11.Bb5 Qe8 12.Qe2 Bb5 13.Qb5 Ra7 14.Qe8 Re8 15.Ke2 Rc8 16.Bb2 Nfd7 Will c5 fall? 17.Be5 Ne5 (worse is 17...Nc5 18.Nc5 Bc5 19.Rhc1+/–; worse is 17...Bc5 A) 18.Nc5?! Ne5 (worse is 18...Rc5 19.Bd4+/–; 18...Nc5? 19.Rhc1+–) 19.Ne5 Rc5=; B) 18.Rhc1 Na6 19.d4+–) 18.Ne5 f6 19.Nf3 Nc6 20.Nd4 Kf7 21.Nb5 Ra6 22.d4 f5 23.h3 Rd8 24.g4 g6 25.g5 Raa8 26.h4 Rab8 27.h5 Kg7 28.Nb6 Rh8 29.Nc7 Kf7 30.Nd7 Rbd8 31.hg6 hg6 32.Rh8 Rh8 33.Rb7 Rc8 (33...Rh2 34.Kd1 Rh1 35.Kd2 Rh2 36.Kc3 Re2+–) 34.Nb5 (34.Nb5 Ke8 35.Na7 Na7 36.Ra7+–) 1–0. jessamine – pcmvr (2850), net–chess.com, 2011.

4.c4 cb5 5.cb5 d5 6.Nf3 Nf6 7.Nc3 Nbd7 8.a4 b6 9.Be2 Bb7 10.0-0 Rc8 11.Bd3 Bb4 12.Ba3 Nc5 13.Bc2 Ba3 14.Ra3 0-0 15.Ne2 Qe7 16.Qa1 Nce4 17.Be4 de4 18.Ne5 Nd5 19.Nc3 Nb4 20.Qb1 (better is 20.Qb2!?–/+) 20...Nd3–+ 21.Nd3 Qa3 (21...Qa3 22.Qb2 Qd6–+; 21...ed3?! 22.Rb3 Rfd8 23.e4+=) 0–1. jboger (2100) – pcmvr (2830), net–chess.com, 2011.

4.d4 d5 5.Nf3 Nf6 6.c4 dc4 7.Bc4 =.

4.Nf3 d5 5.Be2 cb5 6.Bb5 Bd7 7.Be2 =.

4.Nf3 Be7 5.Bb2 Nf6 6.Nc3 0-0 7.bc6 Nc6 8.Nb5 a4 9.h4 a3 10.Bf6 Bf6 (worse is 10...gf6 11.c4+=) 11.c3 d5 12.d4 Re8 13.Be2 e5 14.de5 Ne5 15.0-0 Re6 (15...Bh4 16.Nh4 Qh4 17.Nc7–/+) 16.Rb1 Rb6 17.Nbd4 Nf3 18.Bf3 Raa6 19.Qe2 Bh4 20.Rfd1 Be7 21.Nb5 The isolani on d5 becomes a target 21...Bf5 22.Rb3 Qc8 23.Bd5 (worse is 23.Rd5 Be6–/+) 23...Bg4 24.f3 Bf5 25.c4 Ra4 26.Qd2 h6 27.Rc1 Bc5 28.Kh1 Be6 29.Rd3 Rb4 30.Na3 (worse is 30.Ra3 Bd5 31.Qd5 Be3 32.Re3 R6b5=) 30...Rb2 31.Rc2 Rc2 ½–½. asoka (2500) – pcmvr (2850), net–chess.com, 2011.

4.Nf3 Be7 5.Bb2 Nf6 6.c4 0-0 7.Nc3 cb5 8.Nb5 Nc6 9.Be2 b6 10.0-0 Bb7 11.Rb1 Rc8 12.Qb3 Ne4 13.Ba1 f6 14.Qb2 Qe8 15.d3 Nc5 16.Nc3 Ne5 17.Ne1 Qg6 Can d3 get defended? 18.Qc2 Na6 19.Rb6 Nb4 20.Qd1 Bc6 21.d4 Bd8 22.Rc6 Nec6 23.a3 Na6 24.Nd3 Be7 25.Nb5 Rfd8 26.d5 Ncb8 27.Bd4 Rc4 28.Nf4 Qc2 29.d6 Bf8 30.Bc4 Qc4 31.Bb6 Qb5 32.Bd8 Qc5 33.a4 Bd6 34.Qd3 Nb4 35.Qb5 N4c6 36.Bb6 Qb4 37.Rd1 f5 38.Ne2 Be5 39.f4 Bd6 40.Nd4 Nd4 41.Bd4 (41.ed4?! Bf4 42.d5 Qe4+–; 41.Rd4?! Qe1 42.Qf1 Qe3 43.Kh1 Bf8+=) 41...Qa3 42.Kf2 h6 43.Bb2 Qc5 44.Qc5 Bc5 45.Be5 Nc6 46.Bc7 Kf8 47.Rd7 g6 48.Kf3 h5 49.Rd1 Bb4 50.Rc1 (50.Rc1 Ne7 51.Be5+–) 1–0. aspasio (2875) – pcmvr (2765), net–chess.com, 2014.

4.Nf3 Be7 5.Nc3 Nf6 +=.

4.Nf3 Be7 5.d4 Nf6 6.Nc3 0-0 +=.

4.Nf3 Be7 5.d4 Nf6 6.Bd3 0-0 7.a4+= cb5 8.ab5 d5 9.Nbd2 Nbd7 10.c4 b6 11.Bb2 (11.0-0 Bb7+=) 11...dc4= 12.Nc4 (12.Bc4 Bb7=) 12...Bb4 13.Nfd2 Bb7 (13...Nc5 14.dc5 Qd3 15.Qe2=) 14.0-0+= Rc8 15.e4 Ne8 16.Ba3 Ba3 17.Ra3 Qg5 (17...h6 18.e5+=) 18.Qe2 White intends e5 18...f5 (18...Qe7 19.e5+=) 19.f4+/– White prepares the advance e5 19...Qf6 20.Qe3 Kh8 21.e5 Qd8 22.Be2 Qe7 23.Qg3 Rg8 24.Qg5 (24.Bf3 Bf3 25.Qf3 g5+/–) 24...Qg5+= 25.fg5 Rf8 26.Rh3 Bd5 27.Rf4 (27.g6 h6+=) 27...g6 28.Rfh4 Rf7 29.Kf2 Rd8 (29...Re7 30.Ra3+=) 30.Ra3 Rg7 (30...Rc8 31.Bf3+=) 31.Ra4 (31.Ne3 Bb7+/–) 31...Nc7 (31...Rc8 32.Nf1+=) 32.Nd6 Ne8 33.N2c4 Nd6 34.Nd6 Nf8 35.Rh3 Rc7 36.Raa3 Kg8 37.Rhc3 Rcd7 38.Rc6 Rb8 39.Bf3 Bf3 40.Kf3 Rdd8 (40...Kg7!?+/–) 41.Kf4 Rd7 42.Rac3 Rdd8 43.Ke3 Nd7 44.Rc7 Nf8 45.h4 (45.R3c6 a4 46.Rc3 Rd7+–) 45...Ra8 46.Rb7 Rdb8? (46...Rab8+–) 47.Re7 Rd8 48.Rcc7 a4 49.Ra7 a3 (49...Ra7 50.Ra7 Rd7 51.Ra4 Rc7+–) 50.Nf7 Ra7 51.Nh6 Kh8 52.Ra7 Rd7 53.Ra3 Rb7 (53...Kg7+–) 54.Ra8 Kg7 55.d5! (55.d5 ed5 56.Re8 f4 57.Kf3+–) 1–0. pcmvr (2800) – huimre (2730), net–chess.com, 2007.

4.Nf3 Be7 5.d4 Nf6 6.Bd3 cb5 7.Bb5 0-0 8.0-0 d5 9.Nbd2 Bd7 10.Bd3 Nc6 11.a3 Qc7 12.c4 Bd6 13.h3 e5 14.cd5 Nd5 15.Bb2 ed4 16.Nd4 0–1. ramoschessbrasil (2480) – pcmvr (2850), net–chess.com, 2011.

4.h3 d5 5.Nf3 =.

4.h3 Nf6 5.Nf3 Be7 6.bc6 dc6 7.Be2 0-0 8.0-0 b5 9.d4 Ba6 10.a3 Qc7 11.Ne5 Rd8=+ 12.Re1 c5 13.c3 b4 14.ab4 ab4 15.Ba6 Ra6 16.Ra6 Na6 17.cb4 Nb4 18.Ba3 cd4 19.ed4 Nbd5 20.Be7 Ne7 21.Qa4 Ned5 22.Nd2 Rb8 23.Qa1 h6 24.Rc1= Qb7 25.Ndc4? Ra8?? 26.Qb1= Qb1 27.Rb1 Ne4 28.Nf3 g6 29.Re1 Nec3 30.Nd6 Ra2 31.Ne5= Ne2 32.Kf1 Nd4 33.Ndf7 Kg7 34.Nd6 Nf4 35.Ne4 Nc2 36.Rd1 Ra1 37.Ra1 Na1 38.Kg1 Nb3 39.Ng4 Nd4 40.Nc5 h5 41.Ne3 Kf6 42.Nf1 Nde2 43.Kh2 e5 44.g3 Nd5 45.Ne4 Ke6 46.Nfd2 Nd4 47.Kg2 Nf6 48.Ng5 Kf5 49.Ngf3 Nf3 50.Kf3 e4 51.Ke3 Nd5 52.Ke2 Ke5 53.Kf1 Kd4 54.Kg2 Kd3 55.Nf1? Nc3 56.g4 hg4 57.hg4 Ne2 58.Kh3 g5 59.Kg2? Nf4–+ 60.Kg3 Ke2 61.Ne3 Nd3 62.Kg2?! Nf2 63.Nf5 Ng4 (64.Nd4 Kd3–+) 0–1. MuDvAyNe – Eralos (1900), Partida evaluada, 7m + 0s, 2006.

5.a4 d5 6.d4 Ne4 7.c3 Bd7 8.Qc2 cb5 9.ab5 Be7 (9...Nd6 10.Na3=) 10.Bd3 Nd6 11.Na3 h6 12.0-0 0-0 13.Re1 (13.e4 de4 14.Be4 Nb5 15.Bb7 Ra7+=) 13...Be8 (13...Qc7 14.Bd2=) 14.Rb1 Nd7 15.e4 de4 16.Be4 Ne4 17.Re4 Rc8 18.Bb2 Nf6 19.Re2 Nd5 Attacks the backward pawn on c3 20.Qc1?? (better is 20.c4=) 20...Ba3–+ 21.Ba3 Nc3 (21...Rc3?! 22.Qb2 Bb5 23.Re5+=) 22.Qb2 Bb5 23.Re5 Nb1 24.Qb1 (24.Bf8 Qf8 25.Qb1 Bc6 26.Ra5 Qd8–+) 24...Bc6 25.Bf8 Kf8 26.Qa1 (26.Ne1 Qd4 27.Ra5 Be4–+) 26...Bd5 (26...Bf3 27.gf3 b6 28.Qa3 Kg8 29.Qe3–+) 27.h3 (27.Ne1 Kg8–+) 27...b5 28.Ne1 b4 29.Nd3 Rc3 30.Nf4 Qc7 31.Kh2 (31.Qa4 Bc6 32.Qa2–+) 31...f6 0–1. Haisma,Hans (1615) – Platje,Albert (1610), Dieren NED, Dutch Open–B, 2013.

5.Bb2 d5 6.Nc3 =.

5.Bb2 d5 6.Be2 =.

5.d4 Bb4 6.c3 Be7 =.

5.Be2 cb5 6.Bb5 Nc6 7.0-0 Be7 8.c4 0-0 9.d4 d6 10.Nc3 Bd7 11.Rb1 Ne8 (11...d5 12.c5+=) 12.Ba3 Nc7 13.Ba4 Rb8 14.Qd2 Na7 15.Bd7 Qd7 16.Rb6 Na8 17.Rb2 Rfc8 18.Qd3 Qc6 19.Nd2 Nb6 20.d5 ed5 21.Nd5 Nd5 22.cd5 Qc3 23.Rb3 (23.Qc3 Rc3 24.Nb1 Rc7=) 23...Qd3+= 24.Rd3 Rc2 25.Ne4 Nb5 26.Rb3 Na3 27.Ra3 Ra8 (27...Bd8 28.g4= (worse is 28.Nd6 Be7–/+)) 28.g4 Rc4 29.f3 b5 30.Rb1 b4 31.Ra4 Kf8 (better is 31...Rcc8!?+=) 32.a3+– Ke8 33.ab4 Kd7 34.Ra5 Ra5? (better is 34...Rb4 35.Ra8 Rb1 36.Kf2 Rb2 37.Kg3 h6+–) 35.ba5 Ra4 36.Rb7 Kd8 37.Ra7 1–0. Ghyselen,Wouter (2100) – Voet,Dirk (1930), Antwerpen BEL, Open Ch, 2013.

6.c4 0-0 7.Be2 d5 8.a4 (8.Nc3 dc4 9.Bc4 Bd7=) 8...dc4 9.0-0 cb5 10.ab5 Nbd7 (10...Nd5 11.Na3=) 11.Na3 c3 (11...b6 12.Nc4 Bb7 13.Qc2=) 12.Bc3 Nd5 13.Bd4 b6 14.d3 (14.Nc4 f6=) 14...Bf6 (14...f6 15.Bb2=) 15.Nc4 Bb7 16.Nd6 Qc7 17.Nb7 Qb7 18.Bf6 N7f6 19.Nd4 Qd7 (19...Rfc8 20.Bf3=) 20.Bf3 Rac8 21.Nc6 Rc7 (21...e5 22.Qa4 Rfe8 23.Rfc1+=) 22.Qa4 (22.d4 Rfc8+=) 22...Ne7 (22...Rfc8 23.d4+=) 23.Ne5 Qd6 24.Nc4 Qc5 25.Rfc1 Rfc8 26.Rab1 (26.d4 Qb4 27.Qb4 ab4=) 26...Nd7 (26...Ned5 27.d4 Qe7 28.Rb3=) 27.Be2 (27.Rc2 Nd5=) 27...Qf5 (27...Qd5 28.Rc2=) 28.Qa1 (28.Qd1 Qd5=) 28...Qf6 29.Qf6 (29.d4 Nf5=) 29...Nf6 30.Kf1 Nd7 (30...Kf8 31.Re1 Ned5 32.Ra1=) 31.Ke1 ½–½. marekt – pcmvr, internet, 2005.

6.c4 0-0 7.Bf6 Bf6 8.d4 =+.

6.c4 cb5 7.cb5 b6 8.Be2 Bb7 9.d3 d5 10.a4 0-0 11.Nbd2 Nbd7 12.0-0 Rc8 13.Nb3 Bd6 14.Nbd4 e5 15.Nf5 Bb8 16.Ba3 Re8 17.Rc1 Nc5 18.d4 ed4 19.N3d4 (worse is 19.Qd4 Nb3 20.Qd3 Nc1 21.Rc1 Ne4 22.Rc8 Bc8–/+; 19.N5d4?! Nfe4+=) 19...Nfe4 20.Bf3 g6 21.Ng3 Qh4 22.Bb2 Be5 23.Bg4 f5 (worse is 23...Ng3 24.hg3 Qf6 25.Bc8 Rc8 26.g4+/–) 24.Bf3 f4 25.ef4 Bf4 26.Rc2 Bb8 (26...Ng3? 27.hg3 (27.fg3?! Be3 28.Kh1 Qg5+/–) 27...Bg3 28.fg3 Qg3 29.Nc6+–) 27.Be2 Rf8 28.Nf3 Qf4 29.Bd4 h5 30.Be3 Qd6 31.Qa1 Nb3 32.Qb2 Nbc5 33.Qa2 Rcd8 34.Rd1 Attacking the isolated pawn on d5 34...Qe6 35.Nd4 Qf6 36.Bf3 (better is 36.Ne4 Ne4 37.Bf3+/–) 36...h4?? (better is 36...Kh7=) 37.Ne4+– Ne4 38.Nc6 (better is 38.Be4 Qe5 39.Bf3+–) 38...Rde8?? (better is 38...Bc6 39.Rc6 Qe5 40.Rg6 Kf7 41.Be4 Qe4+–) 39.Nb8 (better is 39.Qd5 Rf7 40.Be4 Bc7+–) 39...Nc3 40.Rc3! Qc3 41.Bd5 Kh7 (41...Bd5 42.Qd5 Rf7 43.Nd7+–) 42.Bb7 (better is 42.Nd7 Bd5 43.Nf8 Rf8 44.Qd5 Qf6+–) 42...Rb8 (42...Re3 43.fe3 Qe3 44.Kh1 Rb8 45.Qf7 Kh6 46.Bc6+–) 43.Bc6 (better is 43.Rd7 Kh8 44.Bd4 Qd4 45.Rd4 Rb7 46.Qe6+–) 43...Rbd8 44.Qb1 (44.Rf1!? h3+–) 44...Rd1 45.Qd1 Rd8 46.Qf1 Qc2 47.Bf3 (47.Bb6 Rd1 48.g3 Qa4–+) 47...Qa4 48.Bb6 Rb8 49.Bc7 Re8 (49...Qb5 50.Bb8 Qb8 51.Qd3+–) 50.h3 Qb4 51.Kh2 Re7 52.b6 Rc7 53.bc7 Qd6 54.Kg1 Qc7 55.Qb1 Kh6 56.Be4 g5 (56...Qd6 57.Qc1 Kh7 58.Qg5+–) 57.Bc2 (better is 57.Qb2 Qd8 58.Qb7+–) 57...Qc4 (57...Kg7 58.Qb2 Kf7 59.Qb3 Kf6 60.Qf3 Qf4 61.Qc6 Ke7 62.Qc5 Kf6 63.Bb3+–) 58.Qb6 (better is 58.Qb2 Qc2 59.Qc2+–) 58...Kg7 59.Qg6 (59.Qg6 Kf8 60.Qf6 Ke8 61.Bg6 Kd7 62.Qg5+–) 1–0. Saradjen,Janko (2180) – Klavcic,Klemen, Ljubljana op 4th, 1993.

6.Be2 0-0 +=.

6.Be2 d5 =.

4.a4 cb5 5.ab5 (5.Bb5 Na6+=) 5...d5 6.Nf3 e6 (6...Qc7 7.Ba3=) 7.Be2 (7.d4 Bb4 8.c3 Bd6+=) 7...Bd6 (7...Qc7 8.Bb2=) 8.Nc3 (8.d4 0-0=) 8...Qc7 (8...Qe7 9.Bb2=) 9.h3 (9.Ba3 Ba3 10.Ra3 e5=) 9...0-0 10.Bb2 e5 11.0-0 (11.Ba3 Ba3 12.Ra3 Be6=+) 11...Nbd7 (11...Bf5 12.Ba3=+) 12.d4 (12.Ba3 Ba3 13.Ra3 b6=) 12...e4 13.Nd2 Nb6 14.f4 (14.Na4!?=) 14...a4–/+ 15.Ncb1 Be6 (15...Bd7 16.Ba3–/+) 16.Na3 (16.Ba3 Rfc8=+) 16...Rfd8 (16...Rfc8 17.Ra2–/+) 17.c3 (17.Ra2 Nc4 18.Ndc4 dc4–/+) 17...Rdc8 18.Rc1 (18.Qb1 Ra5–/+) 18...Qe7 (18...Qd7–/+) 19.Ndb1 (19.Ra1!?–/+) 19...Nc4–+ 20.Nc4 (20.Bc4 dc4 (20...Rc4?! 21.Nc4 dc4 22.Nd2=) 21.Nc2 Ra5–+) 20...dc4 (20...Rc4?! 21.Bc4 dc4 22.Nd2=) 21.Nd2 a3 22.Ba1 Nd5 23.Nc4? (better is 23.Kf2–+) 23...Rc4! 24.Bc4 Ne3 25.Qe2 Nc4 26.Qe4 Nd2 27.Qe3 Nf1 28.Rf1 Bc4 29.Qe7 Be7 30.Rb1 Bd6 31.g3 a2 32.Rb2 Ra5 33.Kf2 Rb5 34.Rb5 Bb5 35.Ke3 Bf1 36.h4 f5 37.Kd2 Bc4 38.Kc2 Kf7 39.Kd2 Kg6 40.Ke3 Kh5 41.Kf2 Ba3 42.Kg2 Kg4 43.Kf2 Bd5 44.c4 Bc4 (45.h5 b5–+) 0–1. jammboy – PeterRs, ChessWorld.net, 2006.

4.a4 cb5 5.Bb5 b6 6.Bb2 Bb7 7.Nf3 g6 8.0-0 Bg7 9.c4 0-0 10.Nc3 Nc6 11.d4 Nb4 12.Ba3 d5 13.c5 (better 13.Rb1+–) 13...bc5=+ 14.dc5 The passed pawn on c5 will quickly become a dangerous weapon (better 14.Rb1=+) 14...e6 (14...Ne4!? 15.Ne4 Ba1 (15...de4?! 16.Nd4=) 16.Qa1 de4–/+) 15.Bb4 (15.c6 Bc6 16.Bc6 Rc8=) 15...ab4= 16.Ne2 (16.Na2 Ne4 17.Rc1 Nc3 18.Nc3 Bc3=) 16...Ne4=+ 17.Rb1 Nc3 (17...Nc5 18.Rb4 Qa5 19.Qb1=+) 18.Nc3= bc3 19.Qd3 (19.Nd4 Rc8=+) 19...Qa5 (19...Rc8!?=+) 20.c6 Ba6 21.Nd4 (21.Qc2 Rfb8 22.Nd4 Bb5 23.ab5 e5=) 21...Rfc8 (21...Qa4 22.Ba6 (22.Ba4?? Bd3 23.Rb4 Bf1 24.Kf1 Rfc8–+) 22...Ra6 23.Qc3 Bd4 24.ed4 Rc6 25.Qe3–/+) 22.Rfc1 (better 22.Qc2=) 22...Bb5?? (better 22...Qa4! 23.Ba6 Ra6–/+ (worse 23...Qa6 24.Qc3 Ra7 25.Qc5+=)) 23.ab5+– (worse 23.Rb5 Qa4 24.Rc5 e5–/+) 23...e5 (23...Qb6!?+–) 24.Nb3+– e4 (24...Qd8 25.Qc3 (25.Rc3?! e4 26.Qd2 Bc3 27.Qc3 Ra4+=) 25...Ra2 26.Nc5+–) 25.Qd5 (25.Na5?! ed3 26.b6 A) 26...Ra5 27.b7 Raa8 A1) 28.ba8B?! d2 (worse 28...Ra8 29.c7 d2 30.Rb8 Bf8 31.Rf1 Rb8 32.cb8Q+–) 29.Rc3 Bc3+=; A2) 28.ba8N c2 (worse 28...Ra8 29.c7 d2 30.Rb8 Bf8 31.Rf1 Rb8 32.cb8Q+–) 29.Nb6 Rc6–+ (29...cb1Q?! 30.Rb1 Rc6 31.Nd5–+; 29...cb1R?! 30.Rb1 Rc6 31.Nd5–+); A3) 28.ba8Q?! Ra8 29.c7 d2 30.Rb8 Bf8+–; A4) 28.ba8R Ra8 29.c7+–; B) 26...c2=) 25...Qa2 (25...Qb6+–) 26.Nd4 (26.Ra1 Qb2 27.Ra8 Ra8 28.c7+–) 26...Qd5–+ 27.Rc3 (27.b6 Bd4 28.b7 Be5–+) 27…Bd4 (27...Bd4 28.ed4 Qb5–+) 0–1. Markzela (1855) – Kvill (1895), lichess.org, 2020.

4.a4 Qb6 5.Na3 d5 6.d4 e6 7.Nf3 (7.Bd3 c5 8.dc5 Qc5=) 7...Bd6 (7...Bb4 8.Bd2=+) 8.Rb1 (8.c4 Bb4 9.Bd2 Ne4=) 8...0-0 (8...c5!?=+) 9.bc6+= Qc6 10.Nb5 Bb4 11.Bd2 Bd2 (11...Ne4 12.Bb4 ab4 13.Rb4+=) 12.Nd2 (12.Qd2 Ne4 13.Qd3 f6=) 12...Bd7 (12...Na6 13.Nf3+=) 13.Bd3 (13.c4 Na6+=) 13...Na6= 14.c3 Qc8 (14...Nc7=) 15.Nd6 (better is 15.0-0!?+=) 15...Qc3=+ 16.Rb3 (16.Ba6 ba6 (< 16...Ra6 17.Nb7 Ne4 18.Qc1=+) 17.Qb3 Qc7–/+) 16...Qc6 (16...Qc7 17.Nb5 Bb5 18.Bb5–/+) 17.Nb5 (17.Nb7!? Nb4 18.Nc5=) 17...Nb4 (17...Rfc8 18.Nf3–/+) 18.Bb1 (18.0-0 Qb6–/+) 18…Qb6 (19.Nc3 Rac8–/+; 18...Rfc8 19.0-0–/+) 0–1. HMBCHESS2 – biffum, Live Game Caissa's Web, 2005.

4.a4 d5 5.bc6 (5.Bb2 Bg4 6.f3 Bd7=) 5...bc6 (5...Nc6 6.Ba3=+) 6.Ba3 g6 7.d4 Bg7 8.Bd3 0-0 9.Ne2 Re8 10.Nd2 e5 11.de5 Re5 12.Nf3 Re8 13.0-0 Ng4 (13...Bg4 14.Nfd4=+) 14.Rb1= Nd7 15.Ng3 Nde5 16.Ne5 Be5 (worse 16...Re5 17.Bb2 Qh4 18.h3 Ne3 19.fe3 Qg3 20.Rf3=) 17.Re1?? (better 17.Qd2=+) 17...Qh4–+ 18.Bc5 (18.Qf3 Qh2 19.Kf1–+) 18...Qh2 19.Kf1 Nf2 20.Qf3 Bg3 21.Qf2 (21.Bd6 Bd6 22.Qf2 Bg3–+) 21...Bf2 22.Kf2 Qh4 (better 22...Bh3 23.Rg1 Re6–+) 23.g3 (23.Kg1–+) 23...Qh2 24.Kf3 h5 (24...Bg4 25.Kf4 g5 26.Kg4 h5 27.Kf3 g4 28.Kf4 Qf2 29.Kg5 Re5 30.Bf5 Qf5 31.Kh4 Qf6) 25.Rh1 Bg4 26.Kf4 Qf2 (26...f6 27.e4 Qd2 28.Be3 g5) 27.Kg5 Re5 28.Kh6 Qf6 29.Bd4 (29.Rb8 Rb8 30.Rh5 Rh5) 29…Qh8 (29...Qg5) 0–1. dbinc007 – timedelay22 (1645), gameknot.com, 2014.

4.Bb2 cb5 5.Bb5 Qb6 6.a4 Nc6 7.Nf3 e6 8.0-0 Be7 9.c4 0-0 10.Nd4 (10.Bf6 Bf6 11.d4 d6+=) 10...d5 11.cd5 Nd5 12.Nc3 Nc3 (12...Ndb4 13.Ne4=) 13.Bc3+= Rd8 14.Nc6 bc6 15.Be2 Bb4 16.Rb1 c5 17.Bb5?? (17.Be5 f6 18.Bg3 e5=) 17...Ba6 (better 17...Bc3 18.Bd3 Bb4–+) 18.Ba6 (18.Qg4 g6 19.Qh3 Bb5=) 18...Qa6=+ (worse 18...Ra6 19.Qg4 g6 20.Qg5+=) 19.Qg4 Threatening mate... how? 19...Bc3 20.dc3 Rd3 21.Rfc1 (21.Qf4 h6=) 21...Rad8 22.h3 Qd6 23.Qg6?? (better 23.Rb5=) 23…hg6–+ (23...hg6 24.Rb5 Qe5–+) 0–1. Markzela (1945) – Kvill (1870), lichess.org, 2020.

4.Bb2 Qb6 5.c4 cb5 6.cb5 e6 7.Nc3 Bb4 8.Be2?? (8.Na4 Qd8 9.Bf6 gf6 10.Rc1+–) 8...d5+= 9.Na4 Qd6?? (9...Qd8 10.Bf6 gf6 11.Rc1=) 10.Nf3?? (10.a3 Bd2 11.Qd2 Nbd7+–) 10...b6?? (better is 10...Qd8+=) 11.a3+– Bc5 12.d4 Nbd7 13.dc5 Nc5 14.Nc5 Qc5 15.0-0 Bb7 16.Qd4 Qd4 17.Bd4 0-0 18.Bb6 Rab8 19.Bc7 Rbc8 20.b6 Ne4 21.Ne5 f6 22.Nd7 Rf7 23.Bb5 Nc3 24.a4 Nb5 25.ab5 Rd7 26.Ra5 Kf7 27.Rc1 Kg6 28.Ra7 Ba8 29.Rca1 Kf5 30.Ra8 Ra8 31.Ra8 Ke4 32.Ra4 Kf5 33.b7 Rc7 34.g4 Kg6 35.b8Q Rc1 36.Kg2 Rb1 37.Qe8 Kg5 38.Qh5 1–0. gtate (1930) – caiorgullonacional (2000), net–chess.com, 2005.

4.Bb2 d5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6).

4.Bb2 d6 5.d4 (5.Bf6 ef6 6.Nf3 d5=) 5...Bg4 6.Nf3 Nbd7 (6...d5 7.Bd3=) 7.Be2 (7.Bd3 cb5 8.Bb5 d5=) 7...Qc7 (7...Qb6 8.Nc3=) 8.Nbd2 e5 (8...cb5 9.Bb5 e6 10.c4+=) 9.h3 Bf5 10.c4 (10.g4 Bg6=) 10...h6 (10...e4 11.Nh4 Be6 12.0-0=) 11.Rc1+= c5 12.0-0 (12.Nf1 Ne4+=) 12...e4 (12...Be7!?=) 13.Nh4+= Bh7 14.Bg4 (14.f3 ef3 15.Rf3 a4+–) 14...cd4 (14...Ng4 15.Qg4 Nf6 16.Qe2=) 15.Bd4+= Ne5 (15...Ng4 16.hg4 Rd8 17.Nf5+=) 16.Bf5+– Qe7 (16...Be7 17.Bh7 Rh7 18.Nf5+–) 17.c5 (17.Qc2 g6 18.Be4 Ne4 19.Qe4 f5+=) 17...dc5+= 18.Bc5 Qd8 19.Bd4 Nfd7 20.Bh7 Rh7 21.g3 Be7 (21...Ba3 22.Rc2+–) 22.Ne4+– Bh4 23.Nd6 Kf8 24.gh4 Qh4 25.Be5 Ne5 26.Nb7 Kg8 (26...Qe4 27.Qd6 Kg8 28.Rfd1 Nf3 29.Kf1 Nh2 30.Qh2 Qb7 31.a4+–) 27.Qd5 Qg5 28.Qg2 Nf3 29.Kh1 Qd5 30.Nd6 (30.Na5 Qa2 31.Nc6 Nd2+–) 30...Qd6 31.Qf3 Rf8 (31...Rb8 32.Rfd1 Qa3 33.Qf5+–) 32.Rfd1 Qe6 (32...Qe7 33.b6 h5 34.Rc7+–) 33.a4 Qa2 (33...Qe7+–) 34.b6 Qe6 (34...Rh8 35.b7 Rb8 36.Rc8 Kh7 37.Qf4 Rhc8 38.bc8R (38.bc8N?! Qc2 39.Qb8 Qd1 40.Kg2 Qa4+–) 38...Rc8 39.Qf5 g6 40.Qc8 Qf2 41.Qb7+–) 35.b7 g5 36.Rc6 g4 37.Rg1 Rg7 38.Re6 gf3 39.Rc6 Rg6 40.Rc8 Kg7 41.Rf8 Rg1 42.Kg1 (42.Kg1 Kf8 43.b8Q Kg7 44.Qg3 Kf6 45.Qf3 Kg6 46.Qe4 Kg7 47.Qd4 Kg6 48.Qb6 Kg7 49.Qa5+–) 1–0. Hjortstam,Kurt – Bendig,Frank, corr 3GMMsemi–08, 1999.

4.Bb2 d6 5.Nf3 e5 6.Be2 g6 (6...e4 7.Nd4=) 7.d4 e4 8.Nfd2 d5 9.c4 Bb4 (9...cb5 10.cd5 b4 11.Qc2+=) 10.a3 Bd2 (10...Be7 11.Nc3+=) 11.Nd2+– (11.Kd2?! dc4 12.Bc4 cb5 13.Bb5 Bd7=) 11...0-0 12.Qb3 (12.c5 cb5 13.Bb5 Bg4+–) 12...a4+= 13.Qc2 Bg4 (13...cb5 14.cd5 Bf5 15.Bb5+=) 14.Bg4 (14.bc6 bc6 15.Bf1 Nbd7+=) 14...Ng4 15.h3 Qh4 (15...Nf6 16.bc6 Nc6 17.0-0+=) 16.0-0 (16.g3 Qh6 17.cd5 cd5 18.Qc7=) 16...Nh6? (16...Nf6 17.bc6 bc6 18.Rab1+=) 17.bc6 (better 17.cd5!? cd5 18.Qc7+–) 17...bc6+= 18.Rac1 (18.Rab1 Nf5+=) 18...f5 (18...Nf5 19.cd5 cd5 20.Qc5=) 19.cd5 cd5 20.Qc5 (better 20.Qc7 Qd8 21.Qf4+=) 20...f4?? (better 20...Qd8+=) 21.Qd5+– Rf7 (21...Nf7 22.Qa8 Qh5 23.Qe4+–) 22.Qa8 (better 22.Rc8 Kg7 23.Qa8 Nd7 24.d5 Nf6 25.Ne4 Nf5+–) 22...f3 (22...Qd8+–) 23.Qb8 Kg7 24.Qg3 (better 24.d5 Qf6 25.Ne4+–) 24...Qg3 25.fg3 (25.d5 Kg8 26.fg3 Rb7+–) 25…fg2 1–0. OnlyPolishOpening (1910) – ufukcry (1810), lichess.org, 2020.

4.Bb2 e6 5.Bc4 Qb6 6.Bd4 c5 7.Be5 (7.Bf6 gf6 8.Qf3 Bg7=) 7...d6 (7...d5 8.Be2=) 8.Bf4 (8.Bf6 gf6 9.Nf3 d5=) 8...Be7 (8...d5 9.Be2=) 9.Qf3 (9.Nc3 d5 10.Bd3 0-0=) 9...Nbd7 (9...e5 10.Bg5=) 10.Qg3 (10.Nc3 d5 11.Be2 e5=+) 10...Nh5 (10...Ne4 11.Qf3 d5 12.Bd3=+) 11.Qg4 Ndf6 12.Qh4 (12.Qd1 Nf4 13.ef4 d5–+) 12...d5 (better is 12...h6–+) 13.Nf3?? (better is 13.Be2 Nf4 14.Qf4–/+) 13...Nf4 14.Qf4 dc4 15.Qc4 0-0 16.a4 Bd7 17.Ra3 Rad8 18.Rd3 Nd5 19.Qg4 f5 20.Qg3 Bd6 21.Qh3 h6 22.Nh4 Rf6 23.e4 fe4 24.Rg3 e5 25.Rg4 h5 26.Rg7 Kg7 27.Qg3 Kf7 28.Nc3 Rg8 29.Ne4 Rg3 30.Ng3 Nb4 31.Nh5 Nc2 32.Kd1 Nd4 33.g4 Bg4 34.f3 Bh5 (35.Kc1 c4–+) 0–1. manofsteel3 – TalLives, Live Game Caissa's Web, 2005.

4.Bb2 e6 5.Bc4 d5 6.Be2 =.

4.Bb2 e6 5.Nf3 b6 =.

4.Bb2 e6 5.Nf3 d5 6.c4 Bb4 7.a3 Bd6 8.d4 cb5 (8...dc4 9.Bc4 cb5 10.Bb5 Bd7 11.Bd3=) 9.cd5 (9.c5 Be7=) 9...Nd5 (9...b4 10.Bb5 Bd7 11.Bd7 Qd7 12.de6 Qe6 13.ab4 Bb4 14.Bc3 Bc3 15.Nc3=) 10.Bb5 Nc6 (10...Bd7 11.Bd3=) 11.0-0 0-0 12.Bc6 (12.Nc3 Qb6 13.Qe2 Bd7+=) 12...bc6= 13.Nc3 (13.Qc2 Rb8=) 13...Ba6 14.Re1 Qe7 (14...Rb8 15.Qc2=) 15.Ne4 Rab8 (better is 15...Rfb8 16.Nd6 Qd6=) 16.Re2?? (better is 16.Qc2+=) 16...Be2–+ 17.Qe2 Rb7 18.Qa6?? Rb2–+ 19.Qc6 Rfb8 20.Ned2 Ba3 21.h3 Bb4 22.Nc4 Rc2 23.Nfe5 Qf6 24.Rf1 a4 25.Ng4 Qe7 (26.Nge5 Qe8–+; 25...Qd8 26.Nge5 Qe8 27.e4–+) 0–1. gtate (1930) – ppost (2145), net–chess.com, 2006.

4.Nc3 e5= 5.Nf3 e4 6.Nd4 d5 7.Bb2 a4 8.bc6 bc6 (8...Nc6 9.Ncb5=) 9.Rb1+= Bc5 10.Nce2 (10.Be2 Qc7=) 10...0-0= 11.Ng3 Bd7 (11...Qc7 12.Be2=) 12.Be2+= g6 13.c4 (13.f3 ef3 14.Bf3 Na6=) 13...h5 (13...Na6 14.Bc3=) 14.Qc1 (14.h4 Na6+=) 14...a3 15.Ba1 Bd6 16.h4 Na6 17.cd5 Nd5? (better is 17...cd5 18.Nc6 Bc6 19.Qc6 Nb4 20.Rb4 Rc8 21.Bf6 Rc6 22.Bd8 Bb4–/+) 18.Ne4+– Be7 19.g4 c5 20.Nb3 Bg4 21.Bg4 hg4 22.h5 g5 23.h6 Kh7 24.Nbc5?? (better is 24.Bg7 Ndb4 25.Qc3+/– (worse is 25.Nbc5 Nc5 26.Nc5 Qd5–/+)) 24...Nc5+/– 25.Nc5 Rc8 26.Rb5 (26.Bd4 Nf4 27.Qc2 f5+/–) 26...f5 27.Qa3 (27.Rb7!?+/–) 27...g3+= 28.Qb2 (28.Bg7 Re8 29.0-0 Qd6+=) 28...Rf7 29.Ne6 Qd7 30.Nd4 Bf6 31.Qb1 Nf4 32.0-0 (32.ef4!? g2 33.Rg1 Bd4 34.Bd4 Qd4 35.Rg2 Qf4 36.Rg3=) 32...Bd4= 33.Bd4 gf2 34.Kf2 Rc4 35.Qb3 Nd3 36.Kg1 Rd4 37.ed4 Qd4 38.Kh2 Qh4 39.Kg2 Rd7 40.Qd1 (40.Qc2!?=) 40...Nf4+= 41.Rf4 Qf4 42.Rb2 (42.d3 Re7 43.Rb2 Qd4–/+) 42...g4 43.Qe2 (43.Qe1 Qd6 44.Kg1 Re7–/+ (44...Qh6?! 45.Qe5 Rf7 46.Rb8=)) 43...Qd6 44.a4 Re7 45.Qb5 f4 46.Qf5 Kh6 47.Kf1 (47.Qg4?? Rg7 48.Qg7 Kg7–+) 47...Rc7 48.Rb1 (48.Qg4 Rc1 49.Kg2 Qd5 50.Qf3 Rg1 51.Kf2 Rf1 52.Kf1 Qf3 53.Ke1 Qe4 54.Kd1 Qa4 55.Ke2 Qe4 56.Kd1 f3–+) 48...Rc5 49.Qe4 f3 (49...g3 50.d4 Rc3 51.Rb7 Rc1 52.Kg2=) 50.d3 Kg5 (50...Rc2 51.Qe3 Kg6=) 51.d4= Rc4 52.Rb5 Kh4 53.Qe1 f2 54.Qf2 (worse is 54.Kf2 g3 55.Kg1 Qd4 (55...Ra4?? 56.Qe4 Qf4 57.Qf4 Kh3 58.Rh5) 56.Kh1 Qd7–+ (56...Ra4 57.Qe7 Kg4 58.Qe6 Kf3 59.Rf5 Qf4 60.Rf4 Rf4 61.Qh3+–)) 54...g3 55.Qd2 Rd4 (55...Ra4?? 56.Qg5 Kh3 57.Qh5; 55...Qd4?? 56.Qh6 Kg4 57.Qh5 Kf4 58.Rf5 Ke4 59.Qf3) 56.Qg5 Kh3 57.Qh5 Rh4 58.Qf5 Rg4 59.Qh5 Rh4 60.Qf5 ½–½. cachisss (1930) – pman3660 (2240), gameknot.com, 2015.

4.Nc3 g6 5.a4 Bg7 6.Rb1 0-0 7.Nf3 d6 8.Be2 e5 9.0-0 Re8 10.d3 (10.d4 e4 11.Nd2 Qc7+=) 10...Qc7 (10...d5 11.Ba3=) 11.Ne4 (11.bc6 bc6 12.e4 d5=) 11...d5 (11...cb5 12.ab5 d5 13.b6=) 12.Nf6 Bf6 13.b6 (13.d4 Nd7=) 13...Qd8 14.e4 d4 15.Nd2 Be6 (15...Ra6 16.f4 Be6 17.fe5 Be5 18.Nf3=+) 16.Nc4 (16.Bg4!?=) 16...Bc4=+ 17.dc4 Nd7 18.f4 (18.c3 Nc5 (worse 18...dc3 19.Qc2=) 19.cd4 Ne4–/+) 18...Nc5 19.fe5 Be5 (worse 19...Re5 20.Bd3=+) 20.Bf4 (20.Bd3!?–/+) 20...Ne4 21.Rc1?? (better 21.Be5 Nc3 22.Bf6 Nd1 23.Bd8–+) 21...Nc3 (21...Bf4 22.Bd3 Bc1 23.Qc1–+) 22.Qd3 (22.Be5 Re5 23.Qe1 Qg5–+) 22...Bf4 23.Rfe1 (23.Rce1 Re3 24.Rf4 Rd3 25.cd3 Na4 26.Rb1–+) 23…Re3 0–1. Sapareva,Magdalena – Ginev,Nikola (1710), 189th Open MGU, 2017.

4.c4 cb5 5.cb5 d5 6.d4 Bf5 7.Bd3 (7.Nf3 e6=) 7...Bd3+= 8.Qd3 e6 9.Nf3 (9.Ba3 Ba3 10.Na3 0-0=) 9...Bd6 10.Nc3 Nbd7 11.0-0 0-0 12.e4 de4 (12...Ne4 13.Ne4 de4 14.Qe4+=) 13.Ne4 Ne4 (13...Bc7 14.Bg5=) 14.Qe4 Qb6 15.Qd3 Nf6 16.Bd2 a4 17.Rfc1 g6 (17...Rfc8 18.Rc8 Rc8 19.Rc1 Rc1 20.Bc1+=) 18.Bg5 Nd5 19.Ne5 Rfc8 20.Nd7 Qa5 21.Nc5 (21.Nf6 Nf6 22.Bf6 Bf4=) 21...Qb6 22.Nd7 Qa5 23.Nc5 (23.Nf6 Nf6 24.Bf6 Bf4=) 23...Qa7 24.Ne4 Bf8 (24...Qb6 25.Nf6 Nf6 26.Bf6=) 25.Nf6 Nf6 26.Bf6 Qb6 27.Rab1 Bh6 28.Rc4 Qd6 29.Qc2 (29.Be5 Qd5 30.Rc2 Bg7 31.Bg7 Rc2 32.Qc2 Kg7=) 29...Rc4 30.Qc4 Qf4 (30...Bf4 31.h3=) 31.Be5 Qe4 32.Rd1 Qd5 (32...Bf4 33.Qc7 Qe2 34.Ra1 Be5 35.Qe5–/+) 33.Qd5+= ed5 34.b6 (34.Re1 Re8 35.Kf1 Bd2=) 34...Rc8= 35.Bc7 (35.a3 Rc3 36.Bd6 Bc1+=) 35...Re8 (35...Bg7 36.a3=) 36.Kf1 Re6 37.f3 (37.a3 Bg7 38.f4 h6=) 37...Bg7 (37...Be3 38.a3=) 38.Kf2 (38.a3 h6=) 38...Kf8 39.f4 Ke7 (39...h6 40.a3=) 40.g3 (40.Be5 f6 41.Bc7 f5=) 40...Kd7 (40...Rc6 41.Ke3+=) 41.Kf3 Rc6 (41...h6 42.Be5 f6 43.Bc7+=) 42.Rd2 (42.Be5 f6 43.Bc7 Rc2–/+) 42...Rc3+= 43.Ke2 f5 (43...h6 44.Be5 f6 45.Bc7+=) 44.Be5 Bf8 45.Bc7 (45.Rd3 Rc6+=) 45...Kc6 46.Rb2 a3 47.Rd2 Bb4 48.Kd1 Re3 49.Re2 Rd3 50.Kc2 Rd4 51.Kb3 (51.h3 Re4 52.Kd3 Bc5–+) 51...Kb5 52.Rg2 (52.Kc2 Re4 53.Kd3 Bc5–+) 52...Re4–+ 53.h3 d4 (53...Bc5 54.Rd2 Re3 55.Kc2 Rg3 56.Rd5–+) 54.g4 (better is 54.Kc2–+) 54...Re3 55.Kc2 d3 56.Kb3 Re2 (56...Re2 57.Be5 Rg2–+; worse is 56...Rh3 57.Rg1–+) 0–1. Nock,Joerg – Hermann,Thomas, corr Germany, 1995.

4.c4 e5 5.Bb2 (5.Nf3 e4 (5...d5 6.Ne5 Bd6 7.d4 Nbd7 8.Nf3 Ne4 9.c5 Bb8) 6.Nd4 c5 7.Ne2 Bd6 8.Nbc3 0-0 9.Ng3 Be5; 5.Nc3 d5 (5...cb5 6.Nb5 Nc6 7.Bb2 Bc5 8.Nf3 d6 9.Be2 0-0) 6.cd5 cd5 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Be6) 5...cb5 (5...Bc5 6.Be5 d6 7.Bb2 cb5 8.cb5 0-0 9.Nf3 Bf5; 5...d6 6.Nc3 Be7 7.Nf3 0-0 8.Qc2 Nbd7 9.Be2 g6) 6.Be5 (6.cb5 d6 7.Nc3 Be7 8.Nf3 0-0 9.Qc2 h6) 6...b4 7.a3 (7.Nf3 Nc6 8.d4 Be7 9.Nbd2 0-0) 7...Nc6 8.Bb2 (8.Nf3 d6 9.Bb2 Bf5) 8...Ra6 (8...d5 9.Nf3+= (9.cd5 Qd5) 9...Be6) 9.d4 (9.Nf3 Qc7=) 9...d5 (9...ba3 10.Ba3 Bb4 11.Nd2 Bc3=) 10.cd5+= Qd5 11.ab4 (11.Ba6!? Qg2 12.Qf3 Qf3 13.Nf3 ba6 14.Nbd2+/–) 11...Bb4+= 12.Bc3 0-0 (12...Rb6 13.Nf3+=) 13.Nf3 (13.Ba6 ba6 14.Nf3+=) 13...Ne4 (better is 13...Rb6 14.Bb4 Nb4=) 14.Bb4+= ab4 15.Ba6 ba6 16.0-0 a5 17.Nfd2 Ba6 18.Re1 Nd6 19.Nb3 f5 (19...Bb7 20.f3+/–) 20.N1d2 Nb7 21.e4 (21.Qf3!? Qf3 22.gf3+–) 21...fe4+= 22.Ne4 Bc4 23.Nbc5 Nd6 24.Nd7 (24.Nd6!? Qd6 25.Rc1+/–) 24...Ne4= 25.Nf8 Kf8 26.Qg4 Nf6 27.Qc8 Kf7 28.Qb7 (better is 28.Rac1!?=) 28...Qd7–/+ 29.Qa8 (29.Qb6!?–/+) 29...Bd5 30.Qa6 (better is 30.f3–+) 30...Qg4 31.f3 Bf3 32.Ra2 (32.Qf1 Qd4 33.Qf2 Qf2 34.Kf2 Bd5–+) 32...Qd4 33.Kh1 Bd5 34.Raa1 (34.Rc2 Qh4 35.Rd1 Ng4 36.Qb7 Ne7 37.Rf1 Kg6–+) 34...Qf2 (better is 34...Ne4!? 35.Rf1 Nf2 36.Kg1–+) 35.Rg1 Ng4 36.Raf1 (36.Qd3 Ne7 37.Qg3 Qg3 38.hg3 Nc6–+) 36...Ke7 37.Re1 (37.Rc1 Qd4 38.Qe2 Nce5–+) 37...Kd6 38.Qc8 (38.Qf1 a4 39.Re2 Qf1 40.Rf1–+) 38...Qf4 (38...Qf4 39.Qg4 Qg4–+; 38...Bg2 39.Rg2 Qe1 40.Rg1 Qe4 41.Rg2 Nf2 42.Kg1 Qe1) 0–1. Menouar,Elhadi – Njili,Kamel (2400), Algier ALG, 2013.

4.c4 g6 5.Bb2 Bg7 6.e4 0-0 7.e5 Ne4 8.f3 Ng5 9.d4 d5 10.c5 cb5 11.Bb5 Nc6 12.Ne2 Ne6 13.Bc6 bc6 14.Nbc3 Ba6 15.0-0 Rb8 16.Na4 (better is 16.Qd2!?+=) 16...Rb4–+ 17.Bc3? (better is 17.Rf2 Bb5 18.Nec3 Rd4 19.Qc2–+) 17...Be2 18.Qe2 Ra4 19.Rfb1 (19.Qd1 Rc4 20.Qd2 a4–+) 19...f6 (19...Nd4 20.Bd4 Rd4 21.Qe3–+) 20.Qc2 (20.ef6 Rf6 21.Rb7 Rc4–+) 20...Rc4 21.Qd2 fe5 22.Re1 (22.Ba5 Qd7 (worse is 22...Rd4 23.Qd4 Qa5 24.Qb4 Qb4 25.Rb4–+) 23.Rc1 Rd4–+) 22...Nd4 23.Ba5 Qd7 24.Rab1 (24.Rac1 Rc1 25.Qc1 e4 26.fe4 Qg4–+) 24...Rf3! 25.Rb8 (25.gf3 Nf3 Double attack) 25...Kf7 26.Rf1 (26.Rb2–+) 26...Rf1 27.Kf1 Qf5 (better is 27...Rc2 28.Qg5 h6 29.Rd8–+) 28.Ke1 (28.Qf2 Rc1 29.Be1 Nc2–+) 28...Nc2 29.Ke2 Rd4 30.Qc3 Qe4 (30...Rf4 31.Rf8 Kf8 32.g4 Rf2 33.Kd1 Rf1 34.Qe1 Qd3 35.Kc1 Ne1 36.Kb2 Rf2 37.Bd2 Rd2 38.Kc1 Qc2) 31.Kf2 Bh6 (better is 31...Rd3!? 32.Qc2 Rf3 33.gf3 Qc2 34.Kg3–+) 32.Qf3 Qf3 33.gf3 (33.Kf3 e4 34.Kg3 Rd3 35.Kf2 Be3 36.Ke2 Ra3–+) 33...Be3 34.Ke2 Ra4 (34...Ra4 35.Rb2 Nd4 36.Ke3 Ra5–+) 0–1. Baer,Cy (1895) – Silies,Martin (1850), RSS7E easy–56, 2007.

4.Be2 e5 5.Bb2 e4 6.d3 d5 7.Nd2 =.

4.Nf3 a4 5.a3 Qb6 (5...d5 6.Bb2=) 6.c4 d6 7.Nc3 Be6 (7...e5 8.Na4 Qd8 9.bc6 Nc6 10.Qb3+=) 8.Rb1 (8.Na4 Qa5 9.Nc3 Bf5+/-) 8...c5 9.Ng5 (9.Na4 Qa5 10.Nc3 Bf5+/-) 9...Bd7 (9...Bf5 10.e4 Bg6 11.d3+=) 10.Bd3 h6 (10...Qa5 11.0-0+/-) 11.Nge4 Ne4 12.Be4 e6 13.Na4 Qa5 14.Nc3 Bc8 15.Qf3 Qc7 (15...Qb6 16.Bb2+-) 16.b6+- Qd7 17.Nb5 Na6 18.0-0 Be7 19.Qg3 0-0 (19...g6 20.d4 0-0 21.Rd1+-) 20.Bb2 e5 21.f4 Bf6 (21...Qd8 22.fe5 de5 23.Be5+-) 22.fe5 (22.Nd6 Bh4 23.Qh4 Qd6+-) 22...Be5 23.Be5 de5 24.Bd5 (24.Qe5 Re8 25.Qd5 Rd8 26.Qd7 Rd7+- (26...Bd7?? 27.Bb7 Rab8 28.Ba6 Rb6 29.Nc7+-)) 24...Qe7 25.e4 (better 25.Rf2 Kh8 26.Na7+-) 25...Nb8? (better 25...Kh7+-) 26.Nc7 Ra3 (26...Ra4 27.Rf7! Rf7+-) 27.Qa3 Nc6 (27...Nd7 28.Qa7 Qd6 29.Bb7 Bb7 30.Qb7 Qd4 31.Kh1 Qc4 32.Nd5+-) 28.Bc6 bc6 29.Na6 (better 29.b7 Bb7 30.Rb7 Qd6+-) 29...Ba6 30.Qa6 Qd6 31.b7 (better 31.Qa7 f6 32.Qc7 Qd4 33.Kh1 Qd8+-) 31...Qd4 (31...Rb8 32.Qa1+-) 32.Kh1 (better 32.Rf2 Rb8 33.Qc6 Rd8+-) 32...Qe4 (32...Qd6+-) 33.b8Q Rb8 34.Rb8 Kh7 35.Qc8 Qc4 36.Qf5 (36.Qf5 g6 37.Qf7 Qf7 38.Rf7) 1-0. pacal56 (2100) - MrArchundia (2190), Rated Blitz game, lichess.org, 2014.

4.Nf3 cb5 5.Bb5+= b6 6.Nc3 (6.Bb2 e6+=) 6...e6 (6...Ba6 7.Rb1+=) 7.e4 (7.0-0 Ba6+=) 7...Ba6 (7...Qc7 8.Bb2+=) 8.Ba6 Na6 9.e5 Nd5 (9...Ng4 10.h3 Nh6 11.Rb1+=) 10.Nd5+– ed5 11.0-0 Bc5 (11...Be7 12.Nd4+–) 12.c3 0-0 13.d4 Be7 14.Rb1 (14.Qb3 Rb8+–) 14...Rb8 15.Qd3 d6?? (better 15...Nc7+=) 16.Qa6+– Qc7 (16...de5 17.Ne5 Bd6 18.Qb5+–) 17.Qb5 Qc4 (17...Qc3 18.Qd5 de5 19.Ne5+–) 18.Qc4 (18.Qd7 Rbe8+–) 18...dc4 19.Ba3 Rfd8 20.Rb5 Rb7 (20...Kf8 21.Rfb1+–) 21.Rfb1 1–0. michaelbuss (2800) – Gaffer (1785), ChessWorld.net, 2012.

4.Nf3 cb5 5.Bb5+= Nc6 6.Bb2 e6 7.Nc3 Be7 8.0-0 0-0 9.Rb1 (9.Qe2 d5=) 9...Nb4 (9...d5 10.Re1=) 10.a3 Na6 11.e4 Nc5 (11...d5 12.ed5 Nd5 13.Nd5 Qd5 14.c4+=) 12.e5+/– Nfe4 13.Ne4 Ne4 14.d3 Nc5 15.d4 Ne4 16.Bd3 Ng5 (16...d5 17.ed6 Nd6 18.c4+/–) 17.Ng5 Bg5 18.Qh5 Bh6? (better is 18...g6!? 19.Qg4 Be7+/–) 19.Bc1+– f5 20.Bh6 gh6 21.Qh6 b6 (21...Rf7 22.Rfd1+–) 22.Rb3 Bb7?? (22...Rf7+–) 23.Be4! Be4 (23...fe4 24.Rg3) 24.Rg3 Kf7 25.Qh5 Ke7 26.Rg7 (26...Rf7 27.Qf7) 1–0. market (2160) – beda (2015), GameColony.com, 2002.

4.Nf3 d5 5.Bb2 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6 5.Nf3).

4.Nf3 d5 5.Nc3 e6 +=.

4.Nf3 d5 5.Be2 cb5= 6.Bb5 Bd7 7.Nc3 e6 8.0-0 Be7 (8...Nc6 9.a4=) 9.Bd7 (9.Ne5 0-0=) 9...Qd7 (9...Nbd7 10.Rb1=) 10.Ne5 Qc8 11.Bb2 a4 12.Nb5 0-0 13.Rb1 Nc6 14.h3 (14.Nd3 Ne4=) 14...Rd8 (14...a3 15.Bd4=) 15.Ba1 (15.d3 Nd7 16.f4 Bc5+=) 15...Nb4 16.Qe2 (16.a3 Nc6= (16...Nc2? 17.Rc1+–)) 16...Nc6 (16...a3 17.c4=) 17.Rfc1+= Ne5 (17...Nd7 18.Nf3+=) 18.Be5 Qd7 19.d3 Rdc8 (19...Ra5 20.c4 dc4 21.dc4+=) 20.Bd4 (20.Rd1 h6+=) 20...b6 21.c3 Ra5 22.Qb2 Ra6 23.Na3 (23.f3 h6+=) 23...Qd6= 24.Nb5 Qd7 25.Rc2 Rc6 (25...h6 26.c4+=) 26.Qc1 Ra8 27.Qd1 Qb7 28.c4 (28.Qf3 h6+=) 28...Nd7 (28...Rac8 29.Rbc1+=) 29.cd5 Rc2 30.Qc2 Qd5 31.Kf1 (31.Nc7 Rc8 32.Nd5 Rc2 33.Ne7 Kf8+=) 31...Bf8 (31...Qb7 32.f4+=) 32.f4 (32.Qc7 a3 (worse is 32...Qa2 33.Nc3 Qc2 34.Qd7+/–) 33.f4 Nc5+=) 32...Qf5+= 33.Kg1 Nc5 34.Rd1 g5 (34...h6 35.Qc4+=) 35.fg5+= Qg5 36.Qf2 (36.Qe2 Re8+=) 36...Qg6 (36...e5 37.Qf3 Ra5 38.Rf1=) 37.Qh4 h6 (37...Rc8 38.Rf1 Qh6 39.Qh6 Bh6 40.Nd6+=) 38.Rf1 Qg5 39.Qf2 Qg6 40.Qe2 Be7 (40...Rd8 41.Rf6 Qh7 42.Rf4+/–) 41.e4 Nd7 (41...Ra5 42.Nc3+=) 42.Bc3 (42.a3 Ra5 43.Qb2 Qg5+=) 42...Rd8 (42...Rc8 43.e5+=) 43.Rf3+/– Kh7 (43...e5 44.a3+/–) 44.e5 Rg8 (44...Nc5 45.Bb4 Bh4 46.Nd6+/–) 45.Qf2 (45.d4 f6+/–) 45...Rf8 46.Kh2 (46.a3 f6 47.ef6 Bf6 48.Bf6 Rf6+/–) 46...f6 47.ef6 Bf6 48.Bf6 Rf6 49.Nc3 Qg7 (49...a3 50.d4+/–) 50.Rf6 (50.Na4?! Rf3 51.gf3 b5=) 50...Nf6 (50...Qf6 51.Qf6 Nf6 52.Na4+/–) 51.Na4 (51.Qb6 Nh5 52.Ne4 Nf4+/–) 51...Nd5+= 52.Nb2 Qe5 53.g3 Ne3 54.Nc4 Nc4 55.dc4 Qe4 56.Qb6 Qe2 57.Kg1 Qe1 58.Kg2 Qe2 59.Qf2 Qc4 60.h4 (60.Qf7 Kh8+/–) 60...Kg6 (60...Kg7 61.Qb2 Kg6 62.Kh2+/–) 61.a3+/– e5? (better is 61...h5!?+/–) 62.h5+– Kg5?? (62...Kg7 63.Qa7 Kg8 64.Qb8 Kf7 65.Qe5 Qc2 66.Kf3 Qb3 67.Qe3 Qd5 68.Kg4+–) 63.Qf3 Qe6 (63...Qc1 64.Kh2 Qc8+–) 64.g4 Kh4 (64...e4 65.Qf5 Qf5 66.gf5 Kf5 67.a4+–) 65.Qh3 (65.Qf2 Kg4 66.Qg3 Kh5 67.Qh3 Qh3 68.Kh3 Kg5+–) 65...Kg5 66.Qe3 Kh4 67.Qf2 Kg5 68.Qf5! (68.Qf5 Qf5 69.gf5 Kf5 70.Kf3+–) 1–0. bla_ner (1915) – pman3660 (2245), gameknot.com, 2015.

4.Nf3 d6 5.d4 d5 6.Nbd2=.

4.Nf3 d6 5.d4 Bd7 6.c4+= a4 (6...e6 7.a4+=) 7.Nc3 e6 8.Be2 d5 9.c5 Qa5? (better 9...b6!? 10.bc6 Nc6 11.cb6 Qb6=) 10.Bd2+– cb5 (10...Qd8!? 11.Na4 Be7+–) 11.Nd5! b4 (11...ed5 12.Ba5 Discovered attack; 11...Nd5 12.Ba5 Discovered attack) 12.Bb4 (12.Nb6 Ra7 13.a3 Bb5+–) 12...Qd8 13.Nb6 Ra7 14.Nd7 Nbd7 15.0-0 (15.a3 Be7+–) 15...Be7 16.Rb1 0-0 17.Qc2 Nd5 18.Bd2 f5 (18...Qc7 19.Bd3 N5f6 20.a3+–) 19.Rfe1 (19.e4 fe4 20.Qe4 Nc7+–) 19...N7f6 20.Ng5 Qd7 (20...Qc8 21.Rec1+–) 21.Bb5 Qc8 22.e4 (22.Ba4 b6 23.cb6 Qc2 24.Bc2 Ra2+–) 22...fe4 23.Ne4 (23.Ba4 b6 24.Ne4 Ne4 25.Re4 bc5+–) 23...Ne4 (better 23...b6+–) 24.Qe4 Rf6 (24...Bf6 25.Bc4 (25.Qe6?! Qe6 26.Re6 Bd4+–) 25...Nc7 26.Rb6+–) 25.Bd3 (25.Bc4 Bf8+–) 25...Rg6 (25...g6 26.Bc4 Bf8 27.Bd5 ed5 28.Qd5 Rf7 29.Be3+–) 26.h4 Nf6 (26...Kf8+–) 27.Qe6 Qe6 28.Re6 Bf8 (28...Rg4 29.Re7 Rd4 30.c6+–) 29.Bg6 hg6 30.Bg5 (30.Reb6 Ne4 31.Be1 g5 32.hg5 Ng5 33.Rb7 Ra8+–) 30...Kf7 (30...Nd5 31.a3 Kf7 32.Re5+–) 31.Reb6 Ne4 (31...Nd5 32.Rb7 Rb7 33.Rb7 Ke6 34.Rb8+–) 32.Rb7 Rb7 33.Rb7 Ke6 34.c6 Ng5 (34...Nc3+–) 35.d5! Kd5 36.c7 (36.c7 Ne4 37.c8Q+–) 1–0. OnlyPolishOpening (1995) – Aleksandersss (1880), lichess.org, 2020.

4.Nf3 d6 5.d4 Bg4 6.Nbd2 Nbd7 7.Bb2 e5 (7...e6 8.Rb1=) 8.h3+= Bf3 9.Qf3 a4 (9...ed4 10.Bd4 d5 11.Be2+=) 10.a3 (10.bc6 bc6 11.Qc6 a3+/-) 10...Qc7+= 11.Rc1 Be7 12.c4 0-0 13.Bd3 Rac8 14.0-0 Qb8 (14...Rfe8 15.Ne4+=) 15.Bc2 cb5 16.cb5 Qa7 (16...ed4 17.Bd4 d5 18.Bb2+/-) 17.Ne4 Qb6 18.Nf6 Nf6 19.Ba4 (19.de5 de5 20.Be5 Qb5 21.Bf6 Bf6+/-) 19...e4+= 20.Qe2 Qa5 21.Bb3 d5 22.Rb1 h6 (22...Ba3?? 23.Ra1+-) 23.Rfc1 Bd6 24.a4 Bb4 25.Rc2 Rc2 26.Qc2 Rd8 27.Rc1 Rd7 28.Qc8 Kh7 29.g3 g6 30.Kg2 Qb6 31.Bd1 Kg7 32.Rc2 (32.Be2!?+/-) 32...Qa5+= 33.Rc1 Qb6 34.Qc2 Qa5 35.Qb3 Bd6 36.Bc3 Qd8 37.a5 Rc7 38.Ra1 White prepares the advance a6 38...Qc8 39.Be1 Rc1 (39...Qf8 40.Be2+/-) 40.Rc1 Qc1 41.a6 Bb8 42.Bc3 Nd7 43.Bg4 Nb6 44.Qb2 Qb2 45.Bb2 Na4 (45...Nc4 46.Bc3+-) 46.Ba3 f5 47.Be2 Kf7 48.Bd1 Nb6 (48...Nc3 49.Bd6! ba6 50.ba6+-) 49.Bc5 Nc8 50.g4 b6 51.gf5 bc5 (51...gf5 52.Bh5 Kg7 53.Bb4+-) 52.fg6 Kg6 53.dc5 Ba7 54.Bg4 Bc5 55.Bc8 Kf6 56.Bb7 Ke5 Black prepares d4 57.Kg3 d4 58.ed4 Bd4 59.Kg4 (59.h4!? Bb6+-) 59...Bf2 60.Kh5 Be3 (60...Bb6+-) 61.b6?? (better 61.h4+-) 61...Bb6+/- 62.Kh6 e3 63.Bf3 Kf4 64.Be2 Kg3 65.Bf1 (65.Bg4+/-) 65...e2?? (better 65...Kf2 66.Bd3 Kg3=) 66.Be2+- Kh3 ½-½. Krivanek,V (2180) - Kaderabek,J (2105), Open Desko Liberec, 2021.

4.Nf3 e6 5.Bb2 d5 6.c4 cb5 7.cb5 Nbd7 8.Nc3 Bd6 9.Rc1 0-0 10.Na4 b6 11.Nd4 Ne4 12.Nc6 Qh4 13.g3 Qg5 14.Bg2 (14.Bd4 Bb4 15.Rc2 Bb7+=) 14...Ndc5 15.0-0 Na4 16.Qa4 Nc5 (16...Nd2? 17.Rfd1 Bg3 18.hg3+– (18.fg3?! Qe3 19.Kh1 Ne4+–; 18.Rd2?! Bd6+–)) 17.Qd4 a4 18.Ba3 (18.Rc3 Bd7=) 18...Bd7 (18...Nb3 19.ab3 Ba3 20.Ra1=) 19.Qc3 Rfc8 20.h4 (20.f4 Qf5 21.d4+=) 20...Qf6 (20...Qg6 21.d4 Nb7 22.Rfe1=) 21.d4 (better is 21.Qf6!? gf6 22.d4 Bc6 23.dc5 Bc5 24.Bc5 (worse is 24.bc6 Ba3 25.Rb1 Rc6–/+) 24...Bb5 25.Bd4 Bf1 26.Rf1+=) 21...Nb7= 22.e4 de4 23.Be4 g6 (23...h6!?+=) 24.Qe3+/– Be8 (24...Ba3 25.Qa3 Bc6 26.bc6+– (26.Rc6?! Na5=; 26.Bc6?! Rc7+=)) 25.Ne5 Rc1 26.Rc1 (worse is 26.Bc1 Ra7 27.Nc6 Bc6 28.bc6 Na5+=) 26...Rb8 27.Bb7 Ba3 28.Qa3 Rb7 29.Rc8 Qe7 30.Qa4 Kg7 31.Qa8 Bb5 32.Ng4 (32.Ng4 f5 33.Rg8 Kf7 34.Rh8 fg4 35.Rh7 Kf6 36.Qh8 Qg7 37.Rg7 Rg7 38.h5+–) 1–0. Woelfelschneider,Peter (2325) – Valverde,Mario (2030), CiF–4er/0171, 2010.

4.Nf3 e6 5.Bb2 Be7 6.Be2 0-0 7.0-0 d5 8.Ne5 cb5 9.Bb5 Nbd7 10.a4 Ne5 11.Be5 Bd6 12.f4 Be5 13.fe5 Nd7 14.d4 Nb6 15.Qh5 Nc4 16.Bc4 dc4 17.Nd2 Qc7 18.Rf3 Qc6 19.Qg4 b5 20.Ne4 Kh8 21.Nf6 Bb7 22.d5 ed5 23.Rh3 gf6 24.Qf5 1–0. guest88 – guest1692, ICC, 2003.

4.Nf3 e6 5.Be2 Be7 6.0-0 0-0 7.c4 cb5 8.cb5 d5 9.Bb2 Qb6 10.a4 Nbd7 11.d4 Qc7 (11...Ne4 12.Nc3=) 12.Nbd2+= b6 13.Rc1 Qd8 (13...Qb8 14.Ne5 Ne5 15.de5+=) 14.Qc2 (14.Bd3 Bb7+/–) 14...Bb7 15.Qb1 (15.Qc7 Rb8+=) 15...Rc8 (15...Ne4 16.Ne4 de4 17.Nd2=) 16.Bd3 g6 (16...Rc1 17.Rc1 Bb4 18.Rd1=) 17.Rc8 Qc8 18.Rc1 Qb8 19.Ba1 (19.Qa1 Rc8+=) 19...Bd6= 20.Qb2 Ng4 21.h3 Bh2 22.Kf1 Nh6 23.e4 Bf4 24.ed5 ed5 25.Re1 Re8 26.Re8 Qe8 27.Ne5 Nf6 28.Ndf3 Bc8 29.g3+/– Bh3 30.Kg1 Be5 31.de5+– Nfg4 32.e6! f6 33.Nd4?? Qe7?? 34.Qe2 Qc5?? 35.Bb2 Ne5= 36.Nc6 Bg4?? 37.Qd2?? Nf3–+ 38.Kg2 Nd2 39.e7 Kf7 40.Bd4 Nb3 41.Bc5–+ Nc5 (42.Bc2 Bd7–+; 41...bc5?! 42.b6 Bc8 43.Bb5=+) 0–1. Plock,Joerg (1705) – Spiegel, Neubrandenburg (15 min), 2004.

5.a4 Bg7 6.Nf3 0-0 7.c4 d5 8.d4 dc4 9.Bc4 cb5 10.Bb5 b6 11.Nc3 Bb7 12.0-0 Nbd7 13.Qe2 e5 (13...Rc8 14.Rac1+=) 14.de5 (14.Ne5 Ne5 15.de5+-) 14...Ng4? (better 14...Bf3 15.Qf3 Ne5+=) 15.Rfd1 Qe7 (15...Bf3 16.gf3 Nge5+-) 16.Rd7 Qe6 (16...Bf3 17.gf3 Qh4 18.fg4 Be5 19.f4+-) 17.Rb7 Ne5 18.Ne5 (18.Nd4 Qc8 19.Rb6 Qc5+-) 18...Be5 19.Rd1 (better 19.Bd7 Qb3 20.Ra3+-) 19...Qf5 (19...Bc3 20.Bc4 Qc6+-) 20.Nd5 Qe6 21.Re7 Bb2 22.Qb2 Qf5 23.Re5 Qg4 24.Nf6 Kg7 25.Ng4 h5 (25...f6 26.Re7 Kg8 27.Nf6 Rf6 28.Qf6 Rd8 29.Rd8) 26.Re7 (26.Rh5 f6 27.Rd7 Rf7 28.Qf6 Kg8 29.Qf7) 26...Kg8 (26...Kh7 27.Qf6 Kg8 28.Nh6 Kh7 29.Rd6 h4 30.Rf7 Rf7 31.Qg6 Kh8 32.Nf7) 27.Rdd7 (27.Nf6 Kg7 28.Nh5 Kh6 29.Qg7 Kh5 30.Be2 Kg5 31.f4 Kh4 32.Qh7) 27...Rad8 (27...Rac8 28.Nf6 Kg7 29.Nh5 Kh6 30.Qg7 Kh5 31.Be2 Kg5 32.f4 Kh4 33.Qh7) 28.Rd8 (28.Nh6 Kh7 29.Nf5 gf5 30.Rf7 Rf7 31.Rf7 Kg6 32.Qf6) 28...Rd8 29.Nh6 Kh7 30.Rf7 Kh6 31.Qg7 Kg5 32.h4! (32.h4 Kh4 33.Qf6 g5 34.g3 Kh3 35.Qe6 g4 36.Bf1) 1-0. opperwezen (2765) - Eldengawy (2105), Monthly Bullet Arena, lichess.org, 2017.

5.Bf6 ef6 6.a4 Bg7 (6...b6 7.Nf3+= Bb4 8.Be2 0-0 9.0-0 Re8; 6...d5 7.Be2 Bd6 8.Nf3 0-0 9.0-0 Re8) 7.c3 (7.d4 0-0+= 8.Nf3 Re8 9.Be2 d5) 7...0-0= (7...Qe7 8.Nf3 cb5 9.Bb5 0-0) 8.Qg4 (8.Nf3 d5 9.Be2 Re8) 8...d5 9.Qg3 Qe7 (9...Re8 10.Be2=) 10.Nf3 Nd7 11.d4 Nb6 12.Nbd2 (12.Bd3 cb5 13.Bb5 Bf5=) 12...Bf5= 13.h4 (13.bc6 bc6 14.Be2 Bc2=) 13...Bc2 (13...Rfc8 14.c4 dc4 15.Bc4 Nc4 16.Nc4 Qb4 17.Nfd2 cb5 18.Nd6–/+) 14.h5 Rac8 (14...Na4 15.c4 cb5 16.cb5+=) 15.hg6 fg6 16.Qh2 (16.c4 dc4 (worse is 16...Na4 17.bc6 bc6 18.Ra2+/–; 16...Ba4? 17.c5+–) 17.Nc4 Qb4 18.Nfd2 Na4+=) 16...Bh8 (16...h6 17.Ra2 Ba4 18.Bd3 cb5 19.Nh4 Rc3 20.Ng6–/+) 17.Be2 (17.c4 c5= (17...Ba4? 18.c5+–)) 17...c5 (17...cb5 18.Bb5 Rc3 19.Qh4–/+) 18.Rc1 (18.Bd1 Bd3=) 18...Ba4+= 19.Ng1? (better is 19.Nh4 Qc7 20.Qh3+=) 19...cd4–+ 20.Nb1? (better is 20.ed4 Bb5 21.Kf1–+) 20...de3 21.f3 (21.fe3 f5–+) 21...Nc4 (21...f5 22.Bd3–+) 22.g4 (22.Nh3 g5–+) 22...Bb5 23.Rd1 (23.Nh3 Qc7 24.Nf4–+) 23...Qc5 (better is 23...Rfd8–+) 24.Bc4 (24.Qh7) 24...Qc4?? (better is 24...h5 25.Bd5 Kg7 26.gh5 Qc7+–) 25.Qh7 1–0. Eries – kehrsam, ChessWorld.net, 2009.

5.Bf6 ef6 6.c4 Bg7 7.Nc3 f5 8.d4 0-0 9.Bd3 d6 10.Nge2 Nd7 11.0-0 Nf6 12.bc6 bc6 13.Rb1 Re8 14.Qa4 Bd7 15.Qa3 White intends c5 15...Bf8 16.Na4 White prepares c5 16...d5 17.Qc1 (17.c5 Ne4 18.Rb2 Bg7+–) 17...Ne4 18.c5 h5 (18...Bh6 19.Nb6 Nf2 A) 20.Na8? Be3 21.Qc2 Nd3 22.Kh1 A1) 22...Qa8?! 23.Qd3 f4 24.Rb6= (24.Nf4? Bf5 25.Qd1 Bb1 26.Qb1 Qb8 27.Qb8 Rb8–+); A2) 22...Nf2 23.Rf2 Bf2–+ (23...Qa8?! 24.Rff1=+); B) 20.Kf2 Be3 21.Qe3 Re3 22.Ke3 Qe7 23.Kf2+–) 19.Nb6+– Ra7 20.a4 Be6 21.f3 Nf6 22.Nf4 Bh6 23.Re1 (23.Ne6?! Re6 24.f4 Ng4=+) 23...Bc8 24.Rb2 Rae7 25.Rbe2 Kg7 26.g3 (26.Qd2 Qc7 27.Nc8 Rc8+=) 26...Qc7 27.Qc3 h4 28.Qa5 (28.Kg2 g5 29.Nh3 g4+=) 28...hg3 (28...g5!?=) 29.hg3+= g5 30.Ng2 Qg3 31.Nc8 Rc8 32.Bf5 Rh8 (32...Rce8 33.Qa6+=) 33.Qb6 (33.Qa6 g4 34.f4+= (34.Qc6 gf3 35.Qa6 Be3 36.Re3 Qg2)) 33...g4+= 34.f4?? (34.fg4 Re4 35.Be4 Bf4 36.Bh7 Rh7 37.ef4 Qh2 38.Kf1 Qh1 39.Kf2 Ng4 40.Kg3 Qh3) 34...Bf4!–+ 35.ef4 (35.ef4 Rh2 Combination) 35...Qh2 (35...Rh2 36.Qb1 Nh5–+) 36.Kf1=+ Qh1 (36...Re2 37.Re2 Qh1 38.Kf2 Rh2–+) 37.Kf2–/+ g3?? (37...Re2 38.Re2 Rh2–+) 38.Kg3+– Qh2 39.Kf2 Re2 40.Re2 (40.Ke2 Qg2 41.Kd1 Rh2–+) 40...Rh4 41.Kf3 (better 41.Ke3 Qg3 42.Kd2 Rf4 43.Nf4 Qf4 44.Kc3 Qf5 45.Rg2 (45.Qc6?! Qf3 46.Kd2 Ne4 47.Re4 Qe4+–) 45...Ng4 46.Qb2 Qf3 47.Kb4+–) 41...Nh5+– 42.Ke3 Qg3 (42...Qg1 43.Kd2 Qd4 44.Kc2 Qa4 45.Qb3 Qb3 46.Kb3 Ng3 47.Nh4 Ne2+–) 43.Kd2+– Nf4? (43...Rh2 44.Qb8 Rg2 45.Qe5 Kg8 46.Bh7 Kh7 47.Qh5 Kg8 48.Rg2 Qg2 49.Qe2 Qg1+–) 44.Qb3 (44.Qc7 Rh3 45.Qe5 (45.Qf4?! Qc3 46.Kd1 Qa1 47.Qc1 Qd4 48.Qd2 Qa1 49.Bb1 Qb1 50.Qc1 Qd3 51.Qd2 Qb1 52.Qc1 Qd3 53.Qd2 Qb1=) 45...Kg8 46.Qe8 (46.Qf4?! Qc3 47.Kd1 Qa1 48.Qc1 Qd4 49.Qd2 Qa1 50.Kc2 Qa4 51.Kc1 Qa1 52.Kc2 Qa4 53.Kc1 Qa1 54.Kc2 Qa4=; 46.Bh3?! Qd3 47.Ke1 Qb1 48.Kf2 Nd3 49.Kg3 Ne5 50.de5 Qb3 51.Re3 Qa4+–) 46...Kg7 47.Bh3 Qd3 48.Ke1 Qg3 49.Kf1 Qf3 50.Rf2 Qd3 51.Ke1 Qb1 52.Kd2 Qd3 53.Kc1 Qc3 54.Kb1 Qb3 55.Rb2 Qd1 56.Ka2 Qa4 57.Kb1 Qd1 58.Ka2 Qa4 59.Kb1 Qd1 60.Ka2 Qa4=) 44...Qb3–+ 45.Nf4 (45.Nh4 Qa2 46.Ke3 Ne2–+) 45...Qb2 (45...Rf4 46.Rg2 Kf6 47.Bd3 Qb2 48.Ke3 Qd4 49.Ke2 Qb2 50.Kd1 Qg2 51.a5 Rf2 52.Be2 Re2 53.a6 Qf1) 46.Bc2 (46.Ke3 Qc1 47.Rd2 Qg1 48.Rf2 Rf4 49.Kf4 Qf2 50.Kg4 Qd4 51.Kf3–+) 46...Qd4 (46...Rf4 47.Rg2 Kf6–+) 47.Nd3 Re4 (47...f5 48.Bb3–+) 48.Rg2 (48.Rg2 Kf8 49.Re2–+). FeegLood (2775) – TheWarning (2600), time forfeit, lichess.org, 2017.

5.Bf6 ef6 6.Be2 d5 7.Nf3 Bd6 8.0-0 0-0 9.bc6 bc6.

5.Bf6 ef6 6.Nf3 d5 7.bc6 bc6 8.c4 Be6 9.cd5 cd5.

5.Bf6 ef6 6.Nf3 Bg7 7.Be2 0-0 8.0-0 d5 9.d4 cb5 10.Bb5 Na6 11.Nbd2 Nc7 12.Qe2 Bf5 13.Nb1 Bc2 14.Qc2 Nb5 15.a4 Nc7 16.Nc3 Na6 17.Qb3 Nb4 18.Na2 Na2 19.Ra2 Qd7 20.Rb2 Rfb8 21.Qb5 Qf5 22.Rfb1 Bf8 23.Ne1 b6 24.Qd3 0–1. Schulz,Hans_Juergen – Kruimer,Wim, TSC, 2002.

(--> 1.b4 c6 2.e3 a5 3.b5 d5 4.c4 Nf6).

5.Bb2 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a5).

5.Bb2 Qb6 6.c4 d5 (6...Bg7 7.Nc3 0-0 8.Na4+=) 7.Nc3 Bg7 (7...dc4 8.Bc4 Bg7 9.Ne5+/–) 8.cd5+/– 0-0 9.Na4 Qd8 10.dc6 bc6 11.b6 Nbd7 12.Rb1 Nb6? (better is 12...Bb7+–) 13.Nb6 Qb6 14.Bf6 Bf6 (14...Qc7 15.Bg7 Kg7+–) 15.Rb6 1–0. pierred (2825) – croach (2370), net–chess.com, 2016.

5.c4 Bg7 6.Bb2 0-0 7.Nc3 d5 8.cd5 cd5 9.Rc1 Ne4 10.Qc2 Bf5 11.d3 Nc3 12.Bc3 Bc3 13.Qc3 Qd7 14.a4 Qd6 15.Qc5 Rc8 16.Qd6 Rc1 17.Kd2 ed6 18.Kc1 Nd7 19.d4 Nb6 20.Kb2 Na4 21.Kb3 Nb6 22.Be2 Rc8 23.Ra1 a4 24.Kb4 Rc2 25.Re1 Rb2 26.Ka3 Rb3 27.Ka2 Nc4 28.Nh4 Rb2 29.Ka1 Bc2 30.Bc4 Normal 1-0. pacalmisu (2155) - naquadria (2165), Rated Blitz game, lichess.org, 2015.

5.Be2 d5 =.

5.Be2 Bg7 6.0-0 0-0 7.Bb2 d5 8.bc6 bc6 9.d3 Nbd7 (9...Bg4 10.Nbd2=) 10.Nbd2 c5 (10...a4 11.c4=) 11.c4 e6 12.Qc2 Qc7 13.a4 Bb7 14.cd5 ed5 15.Rfc1 Rfc8 16.Nb3 Ra6 17.Bc3 Rb8 18.Rab1 Ba8 19.Nc5 (19.Qd2 Rb7+/–) 19...Rb1+= (< 19...Qc5 20.Rb8 Nb8 21.Bf6 Qc2 22.Rc2+/–) 20.Na6 Rc1 21.Qc1 Qc8 22.d4 Ne4 23.Bb2 Qc1 24.Bc1 Bc6 25.Bb5 Bb5 26.ab5 a4 27.Nb4 (27.Nc7 Nb6 28.Ne5 Bf8+=) 27...Nc3 28.Bb2 Nb5 29.Nd5 a3 30.Ba1 f5 31.Kf1 Nf6 32.Nf6 Bf6 33.Ke2 Kf7 34.Kd3 Nc7 35.Ne1 Be7 36.f3 Nd5 37.Nc2 Nb4 (37...Ke6!?+/–) 38.Nb4+– Bb4 39.e4 fe4 40.fe4 g5 41.e5 Ke6 42.Kc4 Be7 43.g4 Kd7 44.d5 Bd8 45.Bd4 a2 46.Kb3 Bb6 47.Ba1 Bg1 48.h3 Bc5 49.Ka2 Ke8 50.Kb3 Be3 51.Kc4 Ke7 52.Kb5 Bd2 53.Kc6 1–0. labackna – PeterRs, ChessWorld.net, 2006.

6.Na3 0-0 7.Be2 d5 8.0-0 c5 9.c4 Be6 10.d4 Nbd7 11.dc5 Rc8 12.c6 bc6 13.Nd4 cb5 (13...cb5 14.cb5 Qb6+=) 0–1. Rushton,Darren (1630) – Kruimer,Wim HJ, TT–03 corr TSC, 2002.

6.Na3 d6 7.Be2 Qc7 8.0-0 0-0 9.Rb1 Be6 10.bc6 bc6 11.Nc4 Nbd7 12.Bd4 Rfb8 13.Rb8 Rb8 14.a3 Bd5 15.Bc3 Attacks the isolani on a5 15...a4 16.Ne1 e5 17.f4 Ne4 18.Ba1 Bc4 19.Bc4 d5 20.Bd3 Qa5 21.Be4 de4 22.f5 Qd5 23.d3 (23.fg6 hg6 24.d3 Bh6=) 23...Bh6 (23...gf5 24.Rf5 Qc5 25.Qc1=+) 24.c4 (24.Qc1 Qc5 25.Kf2 Rb1–+ (25...gf5?! 26.g3–+)) 24...Be3 (24...Qd6 25.Qe2–/+) 25.Kh1=+ Qd6 Black fights for the Initiative 26.Nc2 Bc5 27.de4 Qd1 28.Rd1 Rb3 29.h3 Rb7 30.Bc3 Be7 31.Kh2 Nf6 32.Be5 Ne4 33.Nd4 (33.g4!?=) 33...f6–/+ 34.fg6 (34.Bf4!? Ba3 35.Nc6–/+) 34...fe5–+ 35.gh7 Kh7 36.Nc6 Ba3 37.Re1? (better is 37.Ra1 Rb3 38.Re1–+) 37...Nd2 38.Ne5 Bd6 39.Kg1 Be5 40.Re5 Nc4 41.Re1 (41.Re4 Rc7–+) 41...a3 42.Kf2 a2 43.Ra1 Rb2 (44.Kf3 Nd2 45.Kf4 Nb3–+) 0–1. Tennstedt,Andreas (2220) – Just,Joachim (2275), Oberliga Ost–B, 1999.

6.a4 d5 7.Be2 =.

6.c4 0-0 7.a4 d5 8.d4 dc4 9.Bc4 cb5 10.Bb5 Bd7 11.Nc3 Nc6 12.0-0 Nb4 13.Ba3 Bb5 14.Nb5 Ne4 (14...Nbd5 15.Rc1+=) 15.Qb3 (15.Qb1 Nf6 16.Bb4 ab4 17.Qb4 Nd5+/–) 15...Qd5 16.Qd5 (better is 16.Qb2!? Rfc8 17.Bb4 ab4 18.Qb4+/–) 16...Nd5= 17.Rfc1 Rfc8 18.Kf1 Bf8 19.Ne5 e6 (19...f6 20.Nf3=) 20.Bf8+= Kf8 21.Nd7 (21.f3 Nec3 22.e4 Nb5 23.Rc8 Rc8 24.ab5 Ne3 25.Kf2 Nc4 26.Nc4 Rc4 27.Ra5 Rd4+=) 21...Ke7= 22.Nc5 Nc5 23.Rc5 Rc5 24.dc5 Rc8 25.e4 (25.Nd6 Rc7=) 25...Nb4 (25...Nf6!? 26.Nd6 Rc5 27.Nb7 Rh5+=) 26.Nd6= Rc7 27.Rb1 e5 28.f3 f6 (worse is 28...Rc5 29.Nb7 Rc2 30.Na5+=) 29.Nc4 Nd3 30.Na5 Nc5 31.Rb5 Looking at b7 ½–½. Grossmann,Philipp – Franz,Gerhard (2165), Oberpfalz–ch M1, 1999.

6.c4 0-0 7.Nc3 =.

6.c4 0-0 7.Be2 d6 8.d4 (8.Nc3 Nbd7=) 8...cb5 9.cb5 b6 (9...Bf5 10.0-0=) 10.Nfd2 (10.Nc3 Nbd7=) 10...Bb7 11.Bf3 Ra7 (11...d5 12.Nc3=) 12.Bb7 (12.Nc3 Nbd7=) 12...Rb7 13.Qf3 (13.Nc3 Rc7=) 13...Rc7 (13...d5 14.Nc3=+) 14.Na3 (14.Nc3 d5=) 14...Nbd7 (14...d5 15.Qh3=+) 15.0-0 Qa8 16.Qa8 Ra8 17.Rac1 Rac8 18.Rc7 Rc7 19.Rc1 Rc1 20.Bc1 Nd5 21.Nc2 (better 21.Nab1!?=+) 21...Nc3–/+ 22.Bb2 Nb5 (22...Na2 23.e4–/+) 23.a4 (23.Kf1 Nc7–/+) 23...Nc7 24.Nc4 (24.Na3 d5–/+) 24...f5 (24...d5 25.N4a3–/+) 25.Ne1 (25.Bc3 d5 26.Nd2 e5–/+) 25...Kf7 (25...d5 26.Na3–+) 26.Nd3 (26.Nf3 d5 27.Na3 Nf6–/+) 26...Nd5 (26...Bh6 27.Kf1–/+) 27.Kf1 Bf6 (27...Nb4 28.Ke2–/+) 28.Ke2 g5 (28...Nb4 29.Na3–/+) 29.g3 (29.f3 Nc7–/+) 29...Ke6 (29...Nb4 30.h3–/+) 30.Kd2 (30.f3 Nc7–/+) 30...Nc7 31.Nc1 (31.Kc2 Kd5 32.Kb3 e5 33.de5 de5–+) 31...Na6 (31...d5 32.Na3–/+) 32.Ba3 (32.Ne2 Kd5 33.Na3 Ke4–+) 32...Kd5–+ 33.Kd3 Ke6 (33...g4 34.Nb3–+) 34.Ne2 (34.Kd2 d5 35.Nb2–/+) 34...d5 (34...Nc7 35.f4–/+) 35.Nd2 (35.Nb2 Kf7–/+) 35...Ndb8 36.Nb1 (36.h3 Nc6–/+) 36...Nc6 (36...Nb4 37.Kd2–/+) 37.Nbc3 Nab4 38.Kd2 Kd7 (38...Kd6 39.Nb5 Kd7 40.Bb2–/+) 39.Nb5 e6 (39...e5 40.f4 ef4 41.gf4–/+) 40.Bb2 Be7 (40...h5 41.h3–/+) 41.Ba3 (41.h3 h5–/+) 41...Nd8 42.Nec3 (42.h3 Nf7–/+) 42...Nf7 (42...g4 43.Ne2–/+) 43.Nd1 (43.h3 g4 44.h4 Bd6–/+) 43...g4–+ 44.Ndc3 (better 44.Bb4 ab4 45.Nb2–+) 44...Ng5 45.Ke2 h5 (45...Nh3 46.Kf1–+) 46.Kf1 (46.Nb1 Nf3–+) 46...Nf3 47.Kg2 Ne1 (47...h4!? 48.gh4 Bh4 49.Nd1–+) 48.Kf1 Nec2 49.Bb4 (49.Ke2!? h4–+) 49...ab4 (worse 49...Bb4 50.Ne2 Be7 51.Nf4–/+) 50.Nb1 (50.Nd1 b3–+) 50...Kc6 (50...Na3 51.N1a3 ba3 52.Nc3–+) 51.Nd2? (better 51.Na7 Kb7 52.Nb5–+) 51...Na3 52.Na7 (52.Ke2 Nb5 53.ab5 Kb5–+) 52...Kb7 53.Nb5 Nc4 54.Nb3 (54.Ke2 Nb2–+) 54...Nb2 55.a5 (55.Ke2 Na4 56.Nd2–+) 55...ba5 56.Na5 Kb6 (56...Kb6 57.Na7 Nc4–+) 0–1. Krafzik,Joachim (1810) – Romanow,Werner (1950), 2rd Bayern–ch Seniors, 2010.

6.c4 cb5 7.cb5 d6 (7...0-0 8.Be2=) 8.d4 0-0 (8...Bf5 9.Bd3=) 9.Bd3 Nbd7 10.Nc3 (10.0-0 Nb6+=) 10...Nb6 11.0-0 Be6 12.Nd2 Rc8 13.Rc1 Nfd5 (13...d5 14.Qc2=) 14.Qf3 Nc3 15.Bc3 Nd5 (15...Bd5 16.Be4 Be4 17.Ne4=) 16.Nb1+= Qb6 17.a3 (17.a4 Nf6+=) 17...Nc7 18.a4 (18.Qe2 Nd5+=) 18...Bb3 19.Bc2 Bc4 (19...Ba2 20.Rfd1+=) 20.Rfe1 (20.Rfd1 Nd5+=) 20...Nd5 21.Bd2 Nf6 22.Nc3 (22.Na3 Bd5 23.Qe2 Be6+=) 22...Rc7= 23.Ne4 Nd7 24.Rb1 (24.Ng5 h6 25.Ne4 Rfc8=) 24...Rfc8 (24...e5 25.de5 de5 26.Nc3=+) 25.Bb3= Bb3 26.Rb3 f5 (26...d5 27.Nc3 e6 28.Rc1=+) 27.Ng5 (27.Nc3 e6=) 27...Nf6=+ 28.d5 (28.Rbb1 d5=+) 28...Rc2 Black fights for the Initiative 29.Rd3 Ng4 30.Qh3 The mate threat is Qxh7 30...h6 31.Ne6 R8c4 32.Ng7 Kg7 33.Qh4 g5 (33...Nf6 34.e4 g5 35.Bg5 hg5 36.Qg5 Kf8 37.Qf5 Re4–+) 34.Qh3? (34.Qh5 Ne5 35.Qe8 Qc7–/+ (worse 35...Nd3 36.Qe7 Kg6 37.Qe8 Kf6 38.Qe6 Kg7 39.Qe7 Kg8 40.Qe6 Kh8 41.Qf6 Kg8 42.Qg6 Kh8 43.Qf6 Kg8 44.Qg6 Kh8 45.Qf6=)) 34...Ne5 (better 34...Ra4!? 35.Qh5 Nf6–+ (worse 35...Qb5 36.Bc3 Rc3 37.Rc3–+)) 35.Qf5=+ Nd3 36.Qd3 Qc5 37.Ra1 b6 38.h3 e6 39.de6 The passed pawn on e6 quickly leads to threats 39...Qe5 40.Re1 Qe6 41.e4 Ra2 42.Bc3 Kf8 (42...Kf7 43.Bd4 Raa4 44.Bb6 Re4 45.Qf3 Kg8 46.Re4 Qe4 47.Qe4 Re4 48.Ba5–+) 43.Re3=+ Ke8 (43...Raa4 44.Rf3 Ke8 45.Rf6+–; 43...Rca4 44.Rf3 Ke7 45.Rf6 Re4 46.Re6 Re6 47.Qd4+–) 44.Rf3 (44.e5 d5 45.Rf3 Qg8=+ (45...Raa4? 46.Rf6 Qg8 47.Rb6+–)) 44...Ra3 (44...Rca4 45.Rf6 Re4 46.Re6 Re6 47.Qd5+–; 44...Raa4 45.Rf6 Qe7 46.e5+–; worse 44...Re4 45.Rf6 Raa4 46.Re6 Re6 47.Bd4+–) 45.Qd2 Kd7 (45...Rca4 46.Rf6 Qe7= (46...Qe4 47.Qd6 Qe7 48.Qb8 Qd8 49.Rf8 Kf8 50.Qd8 Kf7 51.Qd7 Kf8 52.Bg7 Kg8 53.Bh6 Ra1 54.Kh2 Rh1 55.Kh1 Ra1 56.Kh2 Rh1 57.Kh1 a4 58.Qg7)) 46.Rf6+= Qe7 (worse 46...Rac3 47.Re6 Ke6 48.Qd5 Ke7 49.Qb7 Ke6 50.Qh7+– (50.Qb6?! Ra4 51.Qb7 Rc5+=)) 47.Bb2 Attacking the isolated pawn on d6 47...Raa4 (47...Re4 48.Qd5 Re1 49.Kh2 Qf6 50.Bf6 Ra4 51.Qf5 Ke8 52.Qg6 Kd7 53.Qh7 Ke8 54.Qg8 Kd7 55.Qd8 Ke6 56.Qe7 Kd5 57.Qe1+–) 48.e5 Rc5 49.Qd3 (49.Qd3 Kd8 50.Rh6+–) 1–0. Reuter,Alfred – Kruimer,Wim, Tigerschachclub, 2002.

6.d4 d5 7.c4 dc4 (7...cb5 8.cb5 Bf5 9.Bd3=) 8.Bc4+= cb5 9.Bb5 Bd7 10.Be2 0-0 11.Ne5 (11.Nc3 Nc6+=) 11...Nc6= 12.Nd7 Qd7 13.Nd2 Rfc8 (13...Rac8 14.Nc4 Nd5 15.Qa4=) 14.0-0 Nb4 15.Nc4 (15.a3 Nbd5=) 15...Qc7 (15...Qe6 16.a3 Nbd5 17.a4+=) 16.a3 (16.Qa4 Qc6 17.Qc6 Rc6+= (17...bc6? 18.Nb6+–; 17...Nc6? 18.Nb6+–)) 16...Nbd5 17.Rc1 (17.a4 Qd7+=) 17...Qd8 (17...b5 18.Ne5 Qb6 19.Qb3+=) 18.Qd3 (18.Qb3 Rcb8+=) 18...b5 19.Ne5 b4 20.Bf3 Rc1 21.Rc1 Rc8 (21...e6!?+=) 22.Nc6 Qb6 (better is 22...Qe8 23.Qb5 e6+–) 23.Qc4+– e6 24.e4 Rc6 (24...Kh8 25.ed5 ed5 26.Bd5+–) 25.Qc6 Qc6 26.Rc6 Ne7 (26...Nf4+–) 27.Ra6 Bf8 (27...h6 28.Ra5 ba3 29.Ra3+–) 28.Ra5 (28.d5 Nd7+–) 28...Nc6 (28...ba3 29.Ra3 Ne8 30.Ra8+–) 29.Ra8 (better is 29.ab4 Nb4 30.Ra8+–) 29...Kg7 (29...ba3 30.Ba3 Nd7+–) 30.d5 ba3 31.Bf6 Kf6 32.dc6 (32.dc6 Bd6 33.Ra3+–) 1–0. Schmidbauer,Jens – Sierian,Peter, North Bayern–ch, 2004.

6.Be2 0-0 7.c4 (7.Nc3 d5=) 7...cb5 (7...d5 8.cd5 cb5 9.Bb5 Qd5 10.Nc3=) 8.cb5 d6 (8...d5 9.Nc3=) 9.h3 (9.Nc3 e5+=) 9...Be6 (9...e5 10.d4=) 10.a4 (10.0-0 a4=) 10...Nbd7 11.0-0 Rc8 (11...Nc5 12.Ra3=) 12.d3 (12.Nd4 Nb6=) 12...Nd5 (12...Nc5 13.Nbd2=) 13.Bg7 Kg7 14.Nd4 (14.Ra3 b6=) 14...Nc5 (14...Qb6 15.Ne6 fe6 16.Nd2=) 15.Bf3 Nd7 16.Ne6 fe6 17.d4 N7b6 (17...Qc7 18.Ra3+=) 18.Nd2 (18.Qe1 Nc4+=) 18...Rc7 (18...Nc3 19.Qb3 Qd7 20.Rfc1+=) 19.Nb3 Qa8 20.Qd2 Nc4 21.Qe2 Ncb6 (21...Ndb6 22.Rfc1+=) 22.Rfc1 Rc1 (22...Rfc8 23.Rc7 Rc7 24.Bg4+/–) 23.Rc1+/– Na4 24.Qd2 Rc8 25.Rc8 Qc8 26.Na5 Qc7 27.Kh2 (27.Qe1 Qd7+=) 27...Qb6 28.Bg4 (better is 28.Bd5!? ed5 29.Qb4+=) 28...Ndc3 29.Nc4 Qb5 30.Be6 Kf6 31.Na3 Qb2 32.Qb2 Nb2 33.Bb3 (33.Bd7 Ncd1+=) 33...d5 34.Kg1 (34.Nc2 Nd3–/+) 34...Nd3 (34...b5 35.Nc2–/+) 35.Kf1 (35.Bc2 Nc1+=) 35...Nc1 (35...b5 36.Bc2 Nb2 37.Nb1 Nb1 38.Bb1+=) 36.Bc2 b5 ½–½. Malmstroem,Jan – Kruimer,Wim, TT–03 TSC, 2002.

6.Be2 cb5 7.Bb5 Nc6 8.0-0 (8.Bf6 Bf6 9.d4 d5=) 8...0-0 9.c4 d5 (9...Na7 10.Qb3=) 10.cd5 Nd5 (10...Qd5 11.Nc3 Qd6 12.d4+=) 11.Bg7+= Kg7 12.d4 Bf5 13.Bc6 (13.Qb3 Ncb4 14.Na3 Rc8+=) 13...bc6 14.Nbd2 Nf6 (14...Nc3 15.Qb3 Ne4 16.Rfc1+=) 15.Rc1 Qd5 16.Qb3 (16.a4 Rfb8+/–) 16...Qb3 (16...Rfb8 17.Qa3+=) 17.ab3 Bd3 (17...a4 18.ba4 Ra4 19.Rc6+/–) 18.Rfe1 Bb5 Black prepares a4 19.Ne5 Attacks the isolani on c6 19...Rfc8 20.g4 (20.Rc5 a4 21.ba4 Ra4+=) 20...a4 21.ba4 Ra4 22.g5 (22.Ra1 Rca8 23.Ra4 Ra4+=) 22...Nd5 23.Ne4 (23.Ra1 f6 24.Ra4 Ba4 25.gf6 ef6+=) 23...f6 24.Nd7 Ra2 25.Ra1 Rca8 26.Ra2 Ra2 27.Rc1 (27.Ndc5 h6 28.h4 hg5 29.hg5 Kf7+=) 27...Bd3 (27...h5 28.gf6 ef6 29.Nd6+=) 28.gf6 ef6 29.Nd6 Bc2 30.h4 (30.h3 h5+=) 30...h6 31.h5 (31.Re1 f5=) 31...gh5 32.e4 (32.Kh1 Nc3 33.Rg1 Bg6+=) 32...Nf4= 33.Kh2 Ne2 34.Re1 Bb3 35.Nf5 Kf7 36.Nc5 (36.Nb8 Ba4=) 36...Be6 37.Ne6 Ke6 38.d5 (38.Kg2 Nf4 39.Kf3 Nh3 40.Ng7 Kf7=) 38...cd5+= 39.Re2 Re2 40.Nd4 Ke5 41.Ne2 d4 (41...Ke4 42.Nc3 Ke5 43.Kg3+=) 42.Nd4 Kd4 43.Kg3 Ke4 44.Kh4 f5 ½–½. Baeckstroem,Mikael (2255) – Luzuriaga,Norberto Horacio (2350), WSTT/3/06/Semifinal, 2008.

6.Bf6 Bf6 7.d4 0-0 =.

7.c4 cb5 8.cb5 d5 9.Be2 Nbd7 10.d4 Ne4 11.Qb3 Nb6 12.Nbd2 Be6 13.0-0 g5 14.Rfd1 Rc8 15.Qa3 h6 16.Ne4 de4 17.Nd2 Bd5 18.Rac1 Qd7 19.Nb3 Bc4? (better is 19...Qd6 20.Nc5 Rfd8+=) 20.Nc5+– Qd5 21.Bc4 Nc4 22.Qb3 b6 23.Rc4 Rfd8 24.Rdc1 bc5 25.Qc2 (25.dc5 Bb2 26.Qc2 Bc1–+) 25...Rb8 (25...Rc7 26.Rb1+– (26.dc5?! Bb2 27.Rb1 Qd3+=)) 26.Rc5 (26.dc5?! Bb2 27.Rb1 Rbc8=) 26...Qe6 27.Ba3 Bf6 28.Rc6 Qd5 29.Qc4 (29.Qb1 Qf5+–) 29...Kg7 30.Qd5 Rd5 31.Kf1 e6 32.Bd6 Rb7 33.R1c5 Bd8 34.Rd5 ed5 35.Rc5 Kf6 36.Be5 (36.Rd5?! Ke6 37.Re5 Kd6 38.Re4 Be7+=) 36...Ke6 37.Rc6 Kf5 38.h3 (38.Rh6!? f6 39.Bg3 Be7+–) 38...h5 Black intends g4 39.Re6?? (39.f3 ef3 40.gf3 f6+–) 39...Be7 (better is 39...Ke6 40.f3 f6–+) 40.Rc6 Bd8 41.Ke2 g4 (41...f6 42.g4! hg4 43.hg4 Kg4 44.Bf6 Bf6 45.Rf6+–) 42.hg4 (42.Rh6!? gh3 43.Rh5 Kg6 44.Rh3 Bc7+–) 42...hg4 43.Bf4 Rd7 44.b6 Rb7 45.Bc7 Be7 46.Kd2 (better is 46.Rc5 Ke6 47.Ra5+–) 46...f6 47.Ke2 Kg6 (47...Bb4 48.Bd8 Be7 49.Be7 Re7 50.Rd6+–) 48.Rc1 (48.Rc5 Bd6+–) 48...Kf7 (48...Bb4+–) 49.Rb1 (better is 49.Rc5 Ke6 50.Ra5+–) 49...Ke6 50.Rb5 Bb4 51.f3 gf3 52.gf3 f5 53.fe4 fe4 54.Kd1 Bd6 55.Bd8 Bb4 56.Rb4! ab4 57.a5 Rh7 58.a6 b3 59.Kc1 1–0. Kool,Gerard (2120) – Neukirch,Detlef (2245), EU–chT Seniors 6th, 2004.

7.c4 d5 8.c5 Bg4 9.Be2 Nbd7 10.d4 Ne4 11.Qc2 f5 (11...e5!? 12.Ne5 Ne5 13.de5 Be2 14.Qe2 Re8=+) 12.Nbd2 e6 (12...e5 13.h3 Nd2 14.Qd2 Bf3 15.Bf3 ed4 16.Bd4 Bd4 17.ed4 Re8 18.Kf1=) 13.h3= Bf3 14.Nf3 h6 (14...e5 15.0-0=) 15.Nd2 (15.0-0 Qc7+=) 15...Qh4 (15...Ndf6 16.bc6 bc6 17.Nf3+=) 16.Ne4 (16.0-0 Nd2 17.Qd2 e5+=) 16...fe4 (16...Qe4 17.Qe4 fe4 18.0-0+=) 17.Bg4 (17.0-0 e5+–) 17...Qf6 18.h4 (better 18.0-0!? h5 19.Be2+–) 18...h5=+ 19.Bh3 Kh7 (19...Nc5 20.dc5 Qb2 21.Be6 Kh8 22.Qb2 Bb2 23.Rb1 Bc3 24.Ke2=+) 20.Rf1 (20.0-0 Qh4 21.bc6 bc6=+) 20...Qh4 (20...Rac8 21.Ba3=+) 21.Be6= Nf6 22.0-0-0 (22.Qe2 Ng4 23.g3 Qh3=) 22...Ng4 Can f2 get defended? 23.Rh1 (23.g3 Qg5=+) 23...Qg5–/+ 24.Rdf1 Bh6 25.Kb1 (25.Bc3 Rf6 26.Bg4 Qg4 27.bc6 bc6–/+) 25...Rf6 26.Bg4 Qg4 27.f3 (27.g3!?–/+) 27...ef3–+ 28.gf3 Rf3 29.Rhg1 Rf1 (29...Be3 30.Rg4 Rf1 31.Ka2 hg4 32.Qh2 Bh6 33.Qc7 Bg7 34.Qb7=) 30.Rf1 Rf8 31.Rf8 (31.Re1 Qg3 32.Qc3 Rf7 33.Qa5 h4 34.bc6 bc6–+) 31...Bf8 32.Qd2? (32.Bc3 Bh6 33.bc6 bc6 34.e4 de4 35.Ba5–+) 32...h4 33.Qa5 (33.Bc3 h3 34.bc6 bc6 35.Qe1–+) 33...h3 34.Qc7 (34.Ka2 Qg2 35.Qb6 h2 36.Qb7 Bg7 37.bc6 h1Q–+) 34...Bg7 35.b6 (35.Ka2 Qe2 36.Qb7 Qc4 37.Ka3 Qd3 38.Kb4–+) 35...Qg1 36.Ka2 h2 37.Qb7 h1Q 38.Qc6 (38.Qg7 Kg7 39.b7 Qb1 40.Ka3 Qd3 41.Bc3 Qc3 42.Ka2 Qha1) 38...Qb1 39.Ka3 Qd3 (39...Qd3 40.Bc3 Qc3 41.Ka2 Qha1) 0–1. Nguyen,Tien Phuc (1990) – Nguyen,Hoang Hiep (1980), Namibian, 2015.

7.bc6 bc6 (7...Nc6 8.Bb5 d5 9.0-0 Bg4 10.h3 Bf5 11.Nc3 Rc8 12.Rb1) 8.Nc3 (8.Be2 d5 9.Nc3 (9.0-0 Nbd7 10.Nc3 Rb8 11.Rb1 Re8 12.Nd4) 9...Na6 10.Rb1 Rb8 11.0-0 Qd6 12.Re1) 8...Ba6 (8...d5 9.Rb1 (9.Be2 Na6 10.Rb1 Rb8 11.0-0 Nc5 12.Ba3) 9...Nbd7 10.Be2 Rb8 11.d4 c5 12.Ne5) 9.d3 d6 (9...Ra7 10.Rb1 Rb7 11.Qc1 d5 12.Be2) 10.Be2 (10.Rb1 Nbd7 11.Be2 Rb8 12.Qd2) 10...Nbd7 (10...Nd5 11.Nd5 Bb2 12.Rb1) 11.0-0 (11.Rb1 Rb8= 12.Qd2) 11...Nc5 (11...Rb8 12.Qc1=) 12.Nd4 (12.Qd2 Rb8 13.Rab1 Qd7=; 12.Rb1=) 12...Qc7 13.h3 (13.Rb1 e5 14.Nb3 Nb3 15.cb3 Rab8=) 13...Rfb8 14.Rb1 Rb7 15.Ba3 Ne6 (15...Rb1 16.Qb1 Nd5 17.Ndb5+=) 16.Rb7 Bb7 17.Ne6 fe6 18.Bb2 Rf8 (18...Rb8 19.Qa1=) 19.d4 Nd5 (19...Rb8 20.Qd3=) 20.Ne4 Qb6 21.Qb1 (21.Ba1 Qc7+=) 21...c5 22.Ng5 Bc8 (22...Rb8 23.Ba1 (worse is 23.Ne6 Bc6 24.Ng7 Qb2 25.Qb2 Rb2+=) 23...Qc6 24.Bb5+= (24.Ne6 Nc3 25.Bf3 Nb1 26.Bc6 Bc6 27.Ng7 cd4 28.ed4 Kf7–/+)) 23.Bg4 cd4 24.Bd4 (24.Ne6 de3 25.Nf8 ef2 26.Rf2 Bd4 27.Bc8 Bf2 28.Kh1 Kf8–/+) 24...Qb1 25.Rb1 Bd4 (25...e5 26.Bf3 Nf6= (worse is 26...ed4 27.Bd5 Kh8 28.Nf7 Kg8 29.Nd6 Kh8 30.Nf7 Kg8 31.Ng5 Kh8 32.ed4+–)) 26.ed4+/– Bd7 (26...e5 27.Ne6 Nc3 28.Nf8 Nb1 29.Bc8 Kf8 30.de5+=) 27.Be6 (27.Rb7 h5 28.Rd7 hg4 29.Ne6 Rc8+–) 27...Be6+/– 28.Ne6 Rf6 (28...Rc8!?+/–) 29.Rb8+– Kf7 30.Nd8 Kg7 31.Nc6 (31.Rb5 Nc3 32.Ra5 Ne2 33.Kf1 Nd4+–) 31...Re6 32.Kf1 (32.c4 Nc3+–) 32...Nc3 33.Ra8 (33.Rb3 Ne4 34.Ke2 Nc5 35.Re3 Re3 36.Ke3 Na4+–) 33...Na4 (33...Re2 34.Ra5 (34.Na5?! Rc2 35.g4 Na4=) 34...Rc2 35.g4+/–) 34.d5 (34.Ra5!? Nc3 35.Ra7 Kf6+/–) 34...Re4 35.f3 (35.Na5?! Nc3=) 35...Rc4 36.Ra5 Kf6 37.Ke2 (37.Ra7 e6+/–) 37...Nc5 (37...Rc2!? 38.Kd3 Ra2+=) 38.Kd2+/– e6 39.de6 Ne6 40.Nb8 Rc7 41.Rb5 (better is 41.Rd5!?+/–) 41...Rc2= 42.Kc2 Nd4 43.Kd3 Nb5 44.Nd7 Kf5 45.Ke3 Nc7 46.g4 Kg5 47.Nf8 Kh6 48.g5 (48.f4 Kg7 49.Nd7 Nd5 50.Ke4 Nf6 51.Nf6 Kf6=) 48...Kg7 (48...Kg5 49.Nh7 Kf5 50.Nf8+=) 49.Nd7= Ne6 50.Nf6?? (better is 50.f4=) 50...Ng5–/+ 51.Ne8 Kh6 (51...Kf8 52.Nd6 Nh3 53.f4–/+) 52.Nd6 Nh3 53.Nf7 (53.f4 Kg7–/+) 53...Kh5 (53...Kg7 54.Ne5–+) 54.Ne5 (54.f4 Kh4–/+) 54...Ng5 (better is 54...Kg5!?–+) 55.f4 Ne6 56.Nf7 (56.Ke4 Ng7–/+) 56...h6 (56...Kh4 57.Nh6–/+) 57.Ne5 Ng7 58.Kf3 Nf5 59.Nf7 (59.Kf2 Nd4–/+) 59...Kh4 60.Ne5 Ne7 61.Nf7 h5 62.Ng5 (62.Ne5 g5 63.fg5 Kg5 64.Nf7 Kh4+=) 62...Nd5 63.Ne4 Nb4 64.Nf2 Nc2 65.Nd3 (65.Ke4 Ne1–/+) 65...Nd4 66.Kg2? (66.Ke4 Ne6 67.Ne5 Nf4 68.Kf4 g5 69.Kf5=) 66...Kg4–+ 67.Ne5 Kf5 68.Nd3 (68.Kh3 Ne2 (68...Kf4?! 69.Ng6 Kg5 70.Nf4=) 69.Kh4 Nf4–+) 68...Ne6 (better is 68...Ke4!? 69.Ne5 g5 70.Nd7 Kf4 71.Nf6–+) 69.Kg3 Nc7 70.Nc5 Ne8 (70...Nd5 71.Nd3 Nc3 72.Kf3–+) 71.Nd7 (71.Nb7 Ng7–/+) 71...Nf6 (better is 71...Nd6–+) 72.Nf8?? (better is 72.Nb6–+) 72...Nd5 73.Nd7 Nf4 74.Nc5 g5 75.Nb3 (75.Kf2 h4 76.Nb3 g4–+) 75...h4 (75...h4 76.Kf2 g4–+) 0–1. novice1234 – kehrsam, ChessWorld.net, 2009.

7.d4 d5 8.Nbd2 Ne4 (8...cb5 9.Bb5 Na6 10.0-0=) 9.c4 (9.Ne4 de4 10.Nd2 Bf5+=) 9...Nd2= 10.Nd2 (10.Qd2 Bg4=) 10...dc4 (10...Be6 11.Qb3=) 11.Bc4+= c5 12.Nb3 b6 (12...Nd7 13.Rc1+=) 13.0-0 Bb7 14.Qc2 (14.Qe2 cd4 15.Rfd1+–) 14...e6 (14...cd4 15.Rad1+=) 15.Rad1 (15.dc5!? bc5 16.Bg7 Kg7 17.Qc3 Qf6 18.Qf6 Kf6 19.Nc5 Rc8 20.Nb7 Rc4+–) 15...cd4 16.Bd4 Bd4 17.Rd4 (17.ed4?! Qd6=) 17...Qg5 18.f4 Qf6 (18...Qe7 19.Rfd1+–) 19.Rfd1 (19.Rd6 Qe7 20.Qd3 Rc8+–) 19...Rc8 (19...Qe7 20.e4+–) 20.Qd2 (20.Qd3 Qf5+–) 20...Kg7 (20...h6 21.e4+–) 21.e4 (21.Rc1 Ra7+–) 21...e5 (better 21...Rc7!?+–) 22.fe5 Qe5 23.Rf1 f6 24.Qd3 (better 24.Rd7!? Nd7 25.Qd7 Kh8 26.Qb7+–) 24...Re8+– 25.Nd2 Ra7 26.Nf3 (26.Bd5 Qe7+–) 26...Qc5 27.Kh1 Qe7 28.Re1 White plans e5 28...Bc8 (28...Ba8 29.e5 f5 30.e6+–) 29.h3 (better 29.e5!? f5 30.Rd6+–) 29...Nd7+= 30.Bd5 Nc5 31.Qc2 Bb7 32.e5 f5 33.Red1 Rd8 34.Qc4 (34.Bb7 Rd4 35.Nd4 Rb7+=) 34...Rd7 (34...Bd5 35.Rd5 Rad7 36.Rd7 Rd7 37.Rd7 Qd7 38.Qh4=) 35.Bc6 Rc7?? (35...Rd4 36.Rd4 Bc8 37.Rd6+=) 36.Rd6?? (better 36.Rd8 Qe6 37.R1d7 Rd7 38.Qe6 Ne6 39.Rd7 Kf8 40.Nh4+– (40.Bb7?! Nc5 41.Rh7 Rb7+=)) 36...Bc6 (36...Ra8 37.Bb7 Rb7 38.Rc6+–) 37.bc6+– Ne4 (better 37...Ra8+–) 38.Qd4+– Kh6 39.Rd7 Qc5 40.Kh2 b5 (40...Qc3+–) 41.ab5 Qb5 (41...Rd7 42.cd7 Ra8+–) 42.Qe3 (42.Qa7?! Ra7 43.Ra7 Ng5 44.Ng5 Kg5+–) 42...g5 43.R1d6! (43.Qa7 Ra7 44.Ra7 g4 45.hg4 fg4=) 43...Kh5 (43...Nd6 44.Qg5) 44.g4! fg4 (44...fg4 45.hg4) 45.Qe4 (45.hg4 Kg4 46.Qe4 Kh5 47.Rh6 Kh6 48.Qh7) 45...gh3 (45...g3 46.Kg3 Qe5 47.Ne5 Rd7 48.Qg4) 46.Kg3 (46.Kg3 Qe5 47.Ne5 Rd7 48.Qg4; 46.Rh6 Kh6 47.Qh7) 1–0. Vukovic,Ljubomir (1960) – Bogavac,Milic, Belgrade Ada op, 2005.

7.Be2 cb5 8.ab5 d5 =.

7.Be2 d5 =.

4.a3 ba3 5.Ba3 e6? (5...d6) 6.Be7! 1–0. Pietrzak,Wojciech – Pflicht, e–mail, 2000.

4.Qb3 e6 5.d4 d5 6.Nd2 Nf6 7.Ngf3 Nbd7 8.Bd3 Be7 9.0-0 0-0 10.Bb2 b6 11.a3 ba3 12.Ba3 Ba3 13.Ra3 Bb7 (13...Ra3 14.Qa3 c5 15.cd5 ed5 16.Ra1=+) 14.Ra8 Qa8 15.cd5 Nd5 (15...cd5 16.Qb2=) 16.Qb2 (16.Qc2 f5=) 16...Qb8 (16...c5 17.Ra1 Qd8 18.Qb1=+) 17.Ng5 (17.Qb1 f5=) 17...h6=+ 18.Ngf3 Qc7 19.Rc1 Ra8 20.Bb5 c5 (20...Qd6!? 21.Bc4 Qb4=+) 21.Bd7 Qd7 22.dc5 bc5 23.Ne4 Nb4 (better is 23...Qe7!? 24.Nc5 Rc8 25.Nb7 Qb7 26.Rc8 Qc8=) 24.Nc5+/– Qb5 25.Nd4 Qb6 26.Nb7 Qb7 27.Nc6 Ra4 28.g3 Qc7 29.Nb4 Rb4 30.Qg7! Kg7 31.Rc7 Rb2 32.Kg2 Kg6 33.h3 h5 34.Re7 Ra2 35.Kf3 Rb2 36.Re8 Kg7 37.e4 Ra2 38.Rb8 Rc2 39.Rb7 Ra2 40.Rd7 Rb2 41.Ke3 Ra2 42.e5 Rb2 43.g4 hg4 44.hg4 Rb3 45.Ke4 Rb4 46.Rd4 Rb2 47.f4 Rb1 48.Rd7 Re1 49.Kf3 Kg6 50.g5 Rf1 51.Ke3 Re1 52.Kf2 Ra1 53.Rb7 Rc1 54.Ke3 54...Re1= 55.Kd4 Rf1 56.Ke4 Re1 57.Kf3 Rf1 58.Kg3 Rg1 59.Kh3 Rh1 60.Kg2+/– Ra1 61.Rc7 Rb1 62.Ra7 Rc1 ½–½. Trkn – guest5839, ICC, 2005.

3.a4 (--> 1.b4 b5 2.a4 c6 3.e3).

3.Bb2 a5 4.a3 a4 5.c4 Ba6 (5...bc4 6.Bc4 Nf6 7.Nf3+/–) 6.c5 (6.cb5 cb5 7.Nc3 Qb6+/–) 6...d5 (6...d6 7.Nf3+=) 7.Nf3 (7.Be2 e6+=) 7...Nd7 (7...Nf6 8.Bf6 ef6 9.d4+=) 8.Nc3 (8.Be2 Ngf6+/–) 8...e5 9.d3 (9.Be2 Bc8+=) 9...Ngf6 (9...Be7 10.Be2=) 10.Be2 (10.Qc2 Be7=) 10...h6 (10...Be7 11.0-0=) 11.h3 (11.0-0 Bc8+=) 11...g5 (11...Be7 12.0-0=) 12.0-0 Bg7 13.Nh2 (13.d4 e4 14.Nd2 Qc7+=) 13...Qe7 (13...Bc8 14.Na2=) 14.f3 (14...0-0-0 15.Ng4=+; 14.d4!?+=). alaamattar (2100) – tmurphy (2135), net–chess.com, 2005.

3.Bb2 Bb7 4.Nf3 e6 5.a3 Nf6 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 c6).

3.Bb2 f6 4.Bd3 e5 (4...Nh6 5.a4+=) 5.Qh5+/– g6? (better is 5...Ke7!?+/–) 6.Bg6!+– Ke7 (6...hg6 7.Qh8) 7.Bd3 (7.Be5 Bh6 8.Be4 fe5 9.Qe5 Kf8 10.Qh8 Bg7 11.Qh7 Ba1+/–) 7...h6? (better is 7...Qe8!? 8.Qh4 Kd8+–) 8.Nf3 d6 (8...e4 9.Be4 d5 10.Bd3+–) 9.Nh4 Kd7 (9...Qe8 10.Bg6 Qd8 11.Be4+–) 10.Ng6 Rh7 (10...Bg7+–) 11.Nf8 Kc7 (11...Qf8 12.Bh7 Qg7+–) 12.Nh7 f5 (12...Qe7 13.Qg6 Be6 14.a4 ba4 15.Ra4+–) 13.a4 e4 14.Be2 Nf6 15.Nf6 d5 16.Be5 Kb7 17.Qf7 (17.Qf7 Bd7 18.ab5+–) 1–0. b4player – oppo, internet, 2009.

3.Bb2 Nf6 4.Qf3 Na6 5.Bb5 Qb6 6.Ba6 Ba6 7.a3 0-0-0 8.d3 Rg8 9.Nd2 Qb5 10.Ne2 Qd5 11.e4 Qg5 12.0-0-0 Kc7 13.Qg3 Qg3 14.hg3 Rb8 15.c4 g6 16.f3 e6 17.Bf6 h5 18.Kc2 Bh6 19.Rb1 Rge8 20.g4 e5 21.gh5 gh5 22.Rh5 Rg8 23.Rh6 Rg2 24.Re1 Rg6 25.Reh1 Re8 26.Rg6 fg6 27.Rh6 Re6 28.Rg6 Rf6 29.Rf6 Bc8 30.f4 ef4 31.Nf4 1–0. Hetfleis,Enrico – Johannsen,Guenther, Dresden, 2000.

3.c4 c5 4.bc5 b4 5.d4 d5 6.cd5 Qd5 7.Nd2 Ba6? 8.Qa4 Qc6?? 9.Qc6 Nc6 10.Ba6 e6 11.Ngf3 h6 12.Bb5 Rc8 13.0-0 f6 14.Nb3 Nge7 15.Na5 g6 16.a3 ba3 17.Ba3 Bg7 18.Nc6 Nc6 19.d5! ed5 20.Rfd1 f5 21.Ra2 0-0 22.Bc6 Rc6 23.Rd5 Rb8 24.h3 Rb5 25.Rd8 Kf7 26.Rd7 Kf6 27.Nd4 Rb1 28.Kh2 Ra6 29.Rd6 Rd6 30.cd6 Rb7 31.Bc5 Rd7 32.Ra7 Rd8 33.d7 (33...Kf7 34.Nc6+–) 1–0. gtate (1800) – cwhite (1815), net–chess.com, 2002.

3.d4 d6 4.c3 (4.a4 ba4 5.Ra4 Nf6+=) 4...Nf6 5.f3 (5.a4 ba4 6.Nf3 Bf5=) 5...Nbd7 (5...a5 6.e4+=) 6.Be2 (6.a4 ba4 7.Qa4 Qc7=) 6...e5 7.de5 de5 8.e4 (8.a4 ba4 9.Qa4 c5=) 8...Be7 (8...a5 9.Bd2 Nb6–/+) 9.c4 (better is 9.a4=) 9...Bb4–+ 10.Bd2 Bd2 11.Qd2 0-0 (better is 11...a6–+) 12.f4? (better is 12.cb5 cb5 13.Bb5+=) 12...Ne4–+ 13.Qe3 Nef6 (13...Ndc5 14.fe5 Qa5 15.Kf1–+) 14.fe5 Re8 15.Nf3 Ng4 16.Qc3 Nge5 17.Ne5 (17.0-0 Qb6 18.Kh1 b4–+) 17...Re5 0–1. gillis (1935) – tjong (2330), net–chess.com, 2016.

3.Nf3 a5!? =.

3.Nf3 d6 4.a4+= Na6 (4...ba4!? 5.d4 Nf6=) 5.ab5+/– Nb4 6.c3 Nd5 7.bc6 The passed pawn on c6 will become decisive later 7...Qb6 8.Qa4 Nc7 9.Na3 White gets in control 9...Qc5 (9...Nf6 10.Rb1 Qc5 11.d4+–) 10.Rb1 Kd8 11.Bc4 e6 12.d4 Qf5 13.0-0 (13.Qc2 Qg4 14.0-0 a5+/–) 13...d5 14.Be2 Ba3 (14...Nf6!?+/–) 15.Ba3+– a5 16.Ne5 (better is 16.Bf8 Qg4 17.h3+–) 16...Ne7 17.Bd3 (17.Rb7 Bb7 18.cb7 Qe5 19.ba8Q Na8 20.de5 Nc7+–) 17...Qf6 18.Rb7 (18.Bd6 Ng6 19.Rb7 Bb7 20.cb7 Ne5 21.Be5+– (21.ba8R Na8 22.Be5 Qe5 23.de5 Nc7+–; 21.ba8N Nc4 22.Bc7 Ke7 23.Bc4 Ra8+–; 21.ba8B Nd3 22.Qa5 Qe7 23.Be7 Kd7+–; < 21.de5 Rb8 22.ef6 Rb7+–)) 18...g6?? (better is 18...Nf5+–) 19.Bd6 Nf5 (19...Bb7?? 20.cb7 Qe5 21.ba8Q (21.ba8N?! Qd6 22.Qa5 Nc6 23.Qc7 Qc7 24.Nc7 Kc7+/–; 21.ba8B?! Qd6 22.Qa5 e5+–) 21...Na8 22.Qa5 Kd7 23.Be5+–) 20.Bf5 (20.Bc7!? Ke8+–) 20...ef5 21.Rc7 Qd6 22.Nf7 (better is 22.Rd7!? Bd7 23.Nf7 Kc7 24.Nd6 Bc6 25.Nb5 Kd8+–) 22...Kc7 23.Nd6 (23.Nh8?! Be6+=) 23...Kd6 24.Rb1 Ra6 25.c4 Rc6 (25...dc4 26.Qc4 Rc6+–) 26.cd5 Rc3 27.Qa5 Rc2 28.Qa3 Kc7 (28...Kd5 29.Qb3 Kd6 30.Qc2+–) 29.Qe7 Bd7 30.Qe5 (30...Kd8 31.Qh8 Ke7 32.Qh7 Kd6 33.Rb6 Kc7 34.Rc6 Rc6 35.dc6 Kc6 36.Qg6 Kc7 37.h4+–) 1–0. Morphystyle – Kevin@home, ChessWorld.net, 2005.

4.Bd3 Bb4?? 5.Bg7 Qg5 6.Bh8 Qg2 7.Qf3 Qf3 8.Nf3 +–.

4.Bd3 Nf6 5.c3 (5.a4 Bb4 6.ab5 cb5 7.Bb5 Bb7=) 5...Be7 (5...a5 6.ba5 Qa5 7.c4=) 6.a4 Ba6 (6...ba4 7.Nf3=) 7.Qe2 (7.ab5 Bb5 8.Bb5 cb5+=) 7...Qb6 (7...Bb7 8.ab5 cb5 9.Nf3+= (9.Bb5?? Bg2 10.Nf3 Bh1–+)) 8.a5 (8.ab5 Bb5 9.Bb5 cb5+=) 8...Qb7 9.Nf3 g6 (9...0-0 10.0-0=) 10.e4 d5 11.e5 Nfd7 (11...Nh5 12.Qe3+=) 12.h4 (12.Na3 Qc7+/–) 12...h5 (12...c5 13.h5 g5 14.Na3+=) 13.Bc2 (13.Na3 Qc7+=) 13...c5= 14.Ba3 (14.bc5 b4 15.d3 b3=+ (15...Nc5?! 16.cb4 Qb4 17.Bc3=)) 14...c4 (14...Nc6!?=+) 15.d4 f6? (better is 15...cd3 16.Bd3 0-0+=) 16.ef6 Bf6 17.Ng5 (17.Qe6 Kd8 18.Bg6 Qc6 19.Qc6 Nc6+–) 17...Bg5 (17...Nf8 18.Ne6 Kf7 19.Ng5 Kg7 20.0-0+–) 18.hg5 (18.Bg6 Ke7 19.hg5 Nc6+–) 18...Ke7? (better is 18...Nf8+/–) 19.Bg6+– Kd6 (19...Nc6 20.Bh5 Kd6 21.f4+–) 20.Nd2 (20.Rh5 Rh5 21.Bh5 Nc6+–) 20...h4 21.Nf3 Nc6 22.Rh4 Rh4 23.Nh4 Rh8 24.g3 Ne7 25.Bc1 Ng6 26.Qc2?? Nh4–+ 27.Bf4 Kc6 28.0-0-0?! Nf5 29.Re1 Qc8 30.Re6+– Kb7 31.Qf5 Nb8?? 32.Qd5 Nc6 33.Re7 Ka8 34.Rc7 Qb8 35.Rc6 Qb7 36.Rd6 Qd5 37.Rd5 Kb7 38.g6 Rg8 39.Rg5 Kc8 40.Be5 White prepares the advance g7 40...Bb7 41.g7 Bd5 42.Bd6 Bf7 43.Bf8 Kd7 44.Rb5 a6 45.Rb6 Be6 46.Ra6 Bd5 47.Rd6 Ke8 1–0. ifairclough – quikeagle, net–chess.com, 2001.

4.Nf3 Nf6 5.a3 Bb7 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 c6).

4.Bb2 bc4 5.Bc4 d5 6.Bb3 Nf6 7.Ne2 e6 8.a3 Bd6 9.g3 (9.0-0 a5 10.ba5 0-0=) 9...e5 10.0-0 Bh3 11.Re1 Ng4 (11...a5 12.d4 e4 13.ba5 Qa5 14.Nbc3+=) 12.f4 ef4 (better is 12...0-0!?=) 13.Nf4+/– (13.Bg7? fg3 14.hg3 Rg8–+; 13.ef4?! 0-0=) 13...0-0?? (better is 13...Bf4 14.ef4 Kf8+/–) 14.Nh3+– Qc7 (14...Qd7+–) 15.Qg4 g6 (15...Be5 16.d4 Bf6 17.Bc2+–) 16.Nf4 (better is 16.Qd4 f6 17.Bd5 cd5 18.Qd5 Kh8 19.Qa8 Bg3+–) 16...Nd7 17.Nh5 (17.Rc1!? Qb7+–) 17...f5 18.Qd4 (better is 18.Qg5!? Ne5 19.Be5 Be5+–) 18...Be5 19.Bd5! cd5 20.Qd5 Rf7 (20...Kh8 21.Rc1 Qc1 22.Bc1 Ba1 23.Qd7 gh5+–) 21.Be5 (21.Qa8 Rf8 22.Qd5 Rf7+–) 21...Ne5 (21...Qe5 22.Qa8 Rf8 23.d4 Ra8 24.de5 gh5 25.e6+–) 22.Qa8 Rf8 23.Nf6 Kf7 24.Qd5 (better is 24.Qa6 Nf3 25.Kf2 Ne1 26.Nh7 Nd3 27.Qd3 Rh8 28.Ng5 Ke7+–) 24...Kf6 25.Nc3 Rd8 (25...Kg7 26.Rad1+–) 26.Qg2 (better is 26.d4 Nf7 27.Qc5 Qd6+–) 26...Nc4 (26...Kg7 27.Ra2+–) 27.Nd5 Rd5 28.Qd5 Ne5 29.Rac1 Qe7 30.Rf1 Kg5 (30...Qe6 31.Qd8 Qe7 32.Qc8+–) 31.Rc4! Nf7 (31...Nc4 32.Qc5 Double attack (32.Qc5 Decoy)) 32.h4 Kh6 33.Rc6 Ne5 34.Re6 (34.Re6 Qc7 35.Qe5 Qe5 36.Re5+–) 1–0. Starr,Albert Martin – Chan,John (1605), San Francisco Bagby mem g/45, 2005.

4.cb5 ab5 5.a4 Ra4 6.Ra4 ba4 7.Qa4 e6 8.Ba3 Nf6 (8...Bb7 9.Bb2=) 9.b5?? (9.Qa7 Bd6 10.b5 c5+–) 9...c5 (9...cb5 10.Bb5 Bb7 11.f3=+) 10.Nf3 (better 10.Qa7 Bd6 11.d4+– (11.Bc5?! Bc5 12.Qc5 Bb7+=)) 10...Qb6 11.Bd3 (11.d4 Bb7=) 11...d6 12.0-0 Be7 13.Nc3 0-0 14.Ra1 (14.Bb2 Nbd7=) 14...Nbd7 15.Qa5?? (15.Bb2 Bb7=) 15...Bb7 (better 15...Qa5 16.Bb2 Qb6–+) 16.Qb6= Nb6 17.Bb2 c4 18.Bc2 d5 (18...Bf3 19.gf3 d5 20.f4=) 19.Nd4 (19.Ra7 Rb8+=) 19...Bb4 20.Na4 Na4 21.Ra4 Bd2 22.Ra7 Bc8 (22...Ba8!?=) 23.Ba3 Re8 24.Ba4 (better 24.b6 e5 25.Nf3 Be3 26.fe3+–) 24...c3?? (better 24...Bd7=+) 25.b6+– Rd8 26.Be7 c2 (26...Ne4 27.Bd8 h6+–) 27.Nc2 Rd7 (27...Bd7 28.Bd8 Ba4 29.Bf6+–) 28.Bd7 (better 28.Ra8 h6 29.Bd7 Kh7 30.Bc8 Bc3+–) 28...Nd7 29.Rd7! Bd7 (29...Bd7 30.b7 Passed pawn) 30.b7 (30.b7 h5 31.b8Q Kh7 32.Bf8+–) 1–0. afsharian – fer3d, lichess.org, 2019.

4.c5 Nf6 5.Bb2 e6 6.d4 d5 (6...a5 7.a4 ab4 8.ab5 Ra1 9.Ba1 d6=) 7.cd6 (7.a4 ba4 8.Qa4 Be7+=) 7...Nd5?? (7...Bd6 8.Qb3=+) 8.a3 (better is 8.e4!?+/–) 8...Bd6= 9.Nc3 (9.e4 Nb6=) 9...Nd7 (9...a5 10.ba5 Qa5 11.Qd3–/+) 10.Bd3 N7f6 (10...a5 11.Ne4 Be7 12.Qc2=) 11.Nf3 Nb6 (11...a5 12.Qc2 Nc3 13.Qc3=) 12.0-0 a5 13.Qc2 a4 (13...ab4 14.ab4 Bb4 15.Ra8 Na8 16.Ne4=) 14.Ng5 (14.e4 Be7+/–) 14...h6 (14...Ng4!? 15.h4 f5+=) 15.Nge4+/– Be7 16.Nf6 Bf6 (16...gf6 17.Rfc1+/–) 17.Ne4 Nd5 (17...Qd5!?+/–) 18.Qc6+– Bd7 19.Nf6 Nf6 20.Qc5 (20.Qf3 0-0+–) 20...Rc8 21.Qe5 Bc6 (21...0-0 22.Bb5 Ng4 23.Qh5 Bb5 24.Qb5+– (24.Qg4?! Bf1 25.Rf1 Rc2+=)) 22.Rfc1 Qd7 23.Rc5 Rb8?? 24.Rac1 Rb6 25.f3 0-0 26.e4 Re8 27.Qg3 Ba8 28.Rc7 Qd8 29.R1c5 Nd7 30.d5 e5 31.Rc2 Rg6 32.Qf2 Nf6 33.Qa7 Qd6 34.Rf7 Nh5 35.Rcc7 Rf8 36.Rf8 Qf8 37.Be5 Qf3 38.Qa8 Kh7 39.Bg3 Qd3 40.Rf7? Qd1 41.Rf1 Qd4 42.Bf2?? Qe4 43.g3?? Rf6 44.Re1 Qg4 45.Qe8 Qf3 46.Qe4 Qe4 47.Re4 Rd6 48.Re5 Nf6 Attacks the isolani on d5 49.Bc5 Rd5 50.Rd5 Nd5 51.Kf2 Kg6 52.Kf3 Kf5 53.g4 Ke5 54.h4 Ke6 55.Bf8 Kf7 56.Bc5 Ke6 57.Ke4 Nf6 58.Kf3 Nd7 59.Bd4 Kf7 60.Kf4 Nf8+= 61.Ke4 Ne6 62.Bc5 g6? 63.Kd5+– Nd8 64.Be3 h5 65.gh5 gh5 66.Kc5 Ke6 67.Kb5 Kd6 68.Ka4 Kc6 69.b5 Kb7 70.Ka5 White prepares b6 70...Nf7 71.b6 Nd6 72.Bg5 Nc4+/– 73.Kb4 Nb6 74.Kb5 Nd7 75.a4 Nb8? 76.a5+/– Na6 77.Kc4 Kc6 78.Kd4 Kd6 79.Ke4 Ke6 80.Kf4 Nb4 81.Bd8 Nc6 82.Bb6 Nb8? 83.Kg5 Kf7 84.Kh5 Kg7 85.Kg5 Kh7 86.h5 Na6 87.h6 Nb4 88.Bd8 Na6 89.Bf6 Nb8 90.Kh5 Na6 91.Bg7 Nc5 92.Kg5 Na6 93.Kf5 Nb8 94.Ke5 Na6?? 95.Kd6 Nb4 96.Kc5 Na6 97.Kb5 Nc7 98.Kc6 Na6 99.Kb6 Nb4 100.Kb5 Nd5 101.a6 Nc7 102.Kb6 Nd5 103.Kb7 Ne7 104.a7 Nf5 105.Bf8 Nh6 106.a8Q Nf7 107.Qc8 Kh8 108.Be7 Kh7 109.Qh3 Kg6 110.Qg4 Kh7 111.Bf6 Kh6+– 112.Qg7 Kh5 113.Qf7 Kg4 114.Kc6 Kf5 115.Kd6 Ke4 116.Qc4 Kf5 117.Qe6 Kf4+– 118.Qe5 Kf3 119.Bg5 Kg4 120.Be3 (120...Kf3 121.Bd4 Kg4 122.Qe4 Kg5 123.Be3 Kf6 124.Bh6 Kf7 125.Qe6#; 120.Qf4 Kh3 121.Qf3 Kh2 122.Bf4 Kg1 123.Qe2 Kh1 124.Qf1#) 1–0. gtate (1900) – sammyo (1965), net–chess.com, 2004.

4.Bc4 d5 5.Be2 (5.Bf1 e5 (5...Nf6 6.Nf3 e5 7.Ne5 Bb4 8.Qc2 Qc7 9.Bb2 Bd6 10.f4 0-0=) 6.Bb2 Bd6 7.Nf3 f6 8.a3 Ne7 9.d4 e4 10.Nfd2 0-0=; 5.Bd3 e5 6.Ba3 Nf6 7.Be2 Bd6 8.Nf3 e4 9.Nd4 0-0 10.Qc2 Bd7+=) 5...e6 (5...e5 6.Ba3 Bd6 7.Qc2 Nf6 8.Nf3 Bg4 9.h3 Bf3 10.gf3 0-0+=; 5...a5 6.ba5 e5 7.d4 Bd6 8.Bd2 e4 9.a3 Qg5 10.Bf1 Na6=) 6.a3 (6.Bb2 Nf6 7.a3 a5 8.Qa4 Bd6 9.Nf3 0-0 10.Nc3 e5=) 6...Bd6 (6...a5 7.ba5 Ba6 8.d3 Qf6 9.Ra2 Qg6 10.g3 Nf6=) 7.Bb2 (7.Nf3 Nf6 8.0-0 a5 9.ba5 e5 10.Bb2 e4=) 7...c5?? (better is 7...Nf6= 8.Nf3 a5 9.ba5 0-0 10.0-0 c5=) 8.Bg7+– Ne7 9.Bh8 Ng6 10.Bg7 cb4 11.Bb5 Bd7 12.Bd3 Qg5 13.Bg6 (13.Nf3 Qg2 14.Rg1 Qh3+–) 13...Qg6 14.Bh8 Qg2 15.Qf3 Qg8 16.Qf6 (16.Bf6!? ba3 17.Ne2 Qf8+–) 16...Nc6?? (16...Qg2 17.Qf3 Qg8 18.Bf6+–) 17.a4?? (17.Nf3 Be7 18.Qg7 0-0-0 19.Qg8 Rg8+–) 17...Be7?? (better is 17...Be5 18.Qf3 Qh8+=) 18.Qb2?? (18.Qg7 Qg7 19.Bg7 e5+–) 18...a5?? (18...Qg2 19.Qg7 Qh1 20.Qg8 Bf8 21.Qg3–+) 19.d3?? (better is 19.Ne2 Qg2 20.Rg1 Qh2 21.Rg8 Bf8+–) 19...Bg5?? (better is 19...Qg2 20.Nf3 Qh1 (worse is 20...Qf3 21.Rg1+=) 21.Ke2 Qg2–/+) 20.h4 (20.Nf3 Bd8 21.Rg1 Qf8+–) 20...Bh6 21.Nf3 (better is 21.Ne2+–) 21...Qg2+/– 22.Rg1 Qh3?? (better is 22...Qf3 23.Nd2 Qf5 24.Rg8 Bf8+/–) 23.Rg8 Bf8 24.Ng5 0-0-0 (24...Qh1 25.Ke2 Qh4+–) 25.Nh3 e5 26.Bf6 (26.Ng5 Be7 27.Rd8 Bd8 28.Nf7 Bh4 29.Ne5 Be7+–) 26...Bh3 27.Bd8 Bh6 28.Bg5 Kc7 29.Bh6 Ne7 30.Qe5 1–0. Eries – WirralBoy, ChessWorld.net, 2011.

4.Bc4 e5 A) 5.Qh5 Qe7 (5...d5 6.Qe5 Qe7 7.Qe7 Be7 8.Be2 Bb4 9.Bb2 Ne7 10.Nf3 a5=) 6.Bb2 d5 7.Be2 Nd7 8.Bc3 Ngf6 9.Qf3 e4 10.Qg3 Rb8+=; B) 5.Bb2 d5 (5...e4 6.a3 d5 7.Be2 a5 8.b5 Qg5 9.g3 cb5 10.Bb5 Bd7=) 6.Bf1 Nd7 7.Nf3 Bd6 8.a3 Ne7 9.Qc2 a5 10.b5 c5+=.

4.Bc4 e6 A) 5.Ba3 Ba6 (5...Qb6 6.Nc3 Ba6 7.Na4 Qb7 8.Ba6 Na6 9.Nc5 Nc5 10.bc5 Rb8=) 6.Be2 Qg5 7.g3 Be2 8.Ne2 Na6 9.Qa4 Qd5 10.0-0 Qc4+=; B) 5.Bb2 Qg5 (5...d5 6.Be2 Nf6 7.a3 a5 8.ba5 Bd6 9.Nf3 0-0 10.0-0 c5=) 6.Nf3 Qg4 7.Be2 Bb4 8.0-0 Nf6 9.Qa4 Bf8 10.Qg4 Ng4=; C) 5.a3 a5 (5...d5 6.Be2 a5 7.ba5 Ba6 8.Bb2 Be2 9.Ne2 Nf6 10.0-0 Bd6=) 6.ba5 d5 7.Be2 Ba6 8.Bb2 Be2 9.Ne2 Nf6 10.0-0 Bd6=.

3.a3 d6 4.c4 Nf6 5.Be2 g6 (5...e5 6.d4=) 6.Nc3 Bg7 7.d4 0-0 8.Bb2 Re8 (8...a5 9.c5 Qd8 10.Nf3+=) 9.Nf3+= Nbd7 10.0-0 e5 11.Qc2 (11.c5 dc5 12.de5 Ng4+=) 11...ed4 12.ed4 (12.Nd4 Ne5+=) 12...Nf8 13.Bd3 (13.Rfe1 Bf5 14.Qb3 Ne6=) 13...Bg4 14.Nd2 Ne6 (worse is 14...Qd4 15.Nd5 Qb2 16.Qb2 Nd5 17.Qc2 Ba1 18.cd5+/–) 15.c5 Qd8 16.Nde4? (16.Nce4 Ne4 17.Ne4 Nd4 18.Bd4 Bd4 19.Nd6 Ba1 20.Ne8 Be5+=) 16...Ne4 (better is 16...Nd4!? 17.Qb1 Ne4 18.Ne4 dc5–+) 17.Ne4+= Nd4 18.Bd4 Bd4 19.Nd6 Ba1 20.Ra1 (20.Ne8!? Be5 21.Nd6 Bd6 22.cd6 Qd6 23.Re1+=) 20...Qf6–/+ 21.Rc1 Re7 22.h3 Be6 23.a4 (23.Rd1 Bd5–/+) 23...Rd8 24.Be4 (24.Bc4 b6–+) 24...Bd5 (24...Qg5!? 25.Qc3–+) 25.Bd5–/+ cd5 26.Qd2 Rd6 27.cd6 Qd6 28.Qd4 f6 29.b5 (29.Rd1 Re5+=) 29...b6 30.f3 (30.Rd1 Kg7+=) 30...Qe5–/+ 31.Rd1 Qd4 32.Rd4 Rd7 33.Kf2 Kf7 34.Ke3 Ke6 35.Kd3 g5 (35...Rc7–/+) 36.g3 (36.f4!?–/+) 36...Rc7–+ 37.f4 (37.a5 Kd6–+) 37...Rc1 38.Rb4 (38.fg5 Rd1 39.Ke3 Rd4 40.Kd4 fg5–+) 38...Rg1 39.a5 (39.fg5 Rg3 40.Kd2 fg5 41.h4–+) 39...Rg3 40.Kd4 (40.Kc2 Rh3 41.fg5 fg5–+) 40...Rf3 41.f5 Rf5 42.Rb3 (42.ab6 ab6 43.Rb1 Rf4 44.Ke3 Rh4–+) 42...Rf4 43.Ke3 Rh4 (better is 43...ba5!? 44.Ra3 a4 45.Kd2–+) 44.ab6 ab6 (44...Rh3?! 45.Kf2 Rb3 46.ba7 Rb2 47.Kf1–/+) 45.Rc3 (45.Kd2 Ke5–+) 45...f5 (better is 45...Rh3 46.Kd4 Rc3 47.Kc3 Kd6–+) 46.Kd2 (46.Kf2 Ke5–+) 46...Rc4 (46...Ke5 47.Rc6–+) 47.Re3 (47.Ra3 Rd4 48.Ke2 Rb4–+) 47...Kd6 (47...Kf6 48.Ra3 Rb4 49.Ra7–+) 48.Re8 Kc5 (48...Rd4 49.Kc2–+) 49.Rf8 Rf4 50.Rg8 (50.Rf7 h5–+) 50...h6 51.Rg6 (51.Rf8 Kb5 52.Rf6 h5–+) 51...Rh4 52.Rf6 f4 53.Rc6 Kb5 54.Rd6 (54.Rc3 d4 55.Rf3 Kc4–+) 54...Kc5 55.Rd8 Rh3 0–1. Sebald,Ralph – Romczik,Detlef (2170), VK Gr4, 1999.

4.Bb2 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.e3).

4.Bb2 d5 (--> 1.b4 c6 2.Bb2 d5 3.e3 Qb6 4.a3 a5).

4.c3 ab4 5.cb4 d5 6.Nf3 Nf6 7.Nc3 Bg4 8.Be2 e5 (better is 8...Nbd7!?+=) 9.Ne5+= Be2 10.Qe2 Bd6 11.Nf3 Qc7 12.Bb2 0-0 13.Rc1 Qe7 14.0-0 Nbd7 15.h3 Ne4 16.d3 Nc3 17.Bc3 Nf6 18.Qb2 Kh8 19.g4 (19.Bf6 Qf6 20.Qf6 gf6+–) 19...Rg8 20.Nd4 (better is 20.Nh4!?+/–) 20...Qe5= 21.Nf3 Qe7 22.Nd4 (better is 22.Nh4!?+/–) 22...Qe5= 23.Nf3 Qe7 24.Ng5 (better is 24.Rfe1+=) 24...Ng4+= 25.Nf7 Qf7 26.hg4 Qf3 27.Rfe1 Qg4 28.Kf1 Qf3 29.Red1? (better is 29.Kg1–/+) 29...Raf8–+ 30.e4 (30.Rd2 Qe3 31.Bd4 Qh3 32.Ke1 Bf4–+) 30...Bg3 (30...Qh1 31.Ke2 Rf2 32.Kf2 Rf8 33.Bf6 Qh2 34.Ke3 Bf4 35.Kd4 Qb2 36.Kc5 Qf6 37.ed5 cd5 38.Re1–+) 31.Bd4 de4 32.de4 Qe4 33.Rc5?? Bf2! 34.Bf2 Qh1 35.Ke2 Rf2! 36.Ke3 Qf3 37.Kd4 Qd1 0–1. combijack (1830) – chesssebas (1735), gameknot.com, 2011.

4.c3 ab4 5.cb4 e5 6.Bb2 Bd6 (6...d6!?=) 7.Nf3 c5? (better 7...Qc7+=) 8.Ne5+– (8.Be5?! Be5 9.Ne5 cb4+–) 8...cb4?? (better 8...Be5 9.Be5 Nf6 10.bc5 Qc5 11.Bf6 gf6+–) 9.Nc4 Qc7 10.Nd6 Qd6 11.Bg7 Ne7 12.Bh8 1–0. KLINGON09 (1780) – Dishonest_John (1705), lichess.org, 2019.

4.c3 d5 5.Qc2 g6 (5...e5 6.c4+=) 6.Bb2 Bg7 7.d4 Nd7 8.Nf3 e5 9.de5 Ne5 10.Ne5 Be5 11.Nd2 Ne7 12.c4 Qc7 13.Be5 Qe5 14.Rc1 ab4 15.ab4 0-0 16.Nf3 Qf6 17.Be2 Ra1 18.0-0 Rc1 19.Rc1 Be6 20.h3 (20.c5 Ra8+=) 20...Ra8 (20...dc4 21.Rd1+=) 21.g4 (21.c5 Bf5 22.Qd2 Be4+=) 21...Ra1 (21...dc4 22.g5 Qg7 23.Bc4+=) 22.Kg2 Rc1 23.Qc1 h6 (23...dc4 24.Bc4 Nd5 25.Nd4=) 24.Nd4 (24.c5 h5 25.gh5 gh5+=) 24...Bd7 (24...dc4 25.Ne6 fe6 26.Bc4=) 25.Qa3 dc4 26.Bc4 b5 27.Ba2 Qd6 28.Qb3 (28.Qa7 Be6 29.Ne6 fe6+=) 28...Nd5 29.Nb5?? (better is 29.Nc2=) 29...cb5–+ (29...Qb4?! 30.Nd4=) 30.e4 (30.Kg1 Be6 31.Qd3–+) 30...h5 (better is 30...Nf4 31.Kf3 Be8–+) 31.ed5 (31.Qd5!? Qd5 32.ed5 hg4 33.hg4 Bg4 34.d6+/–) 31...hg4= 32.hg4 ½–½. combijack (1820) – yellowlab (1855), gameknot.com, 2013.

4.c3 d5 5.d4 ab4 6.cb4 e5 7.Bb2 (7.de5 Bb4 8.Bd2 Bd2 9.Qd2 Bf5+=) 7...e4 8.Nd2 Bd6 9.Ne2 Nf6 10.h3 0-0 11.g4 (11.Nc3 Qd8+=) 11...h6 (11...Qd8 12.Rc1–/+) 12.Bg2 Nbd7 13.0-0 Re8 14.Re1 1–0. combijack (1885) – zack1984 (2050), gameknot.com, 2016.

4.c3 d5 5.d4 Bf5 6.Nd2 ab4 7.cb4 e6 8.Bb2 Nf6 9.Ngf3 Bd6 10.Be2 0-0 11.0-0 Nbd7 12.Nh4 Qc7 13.h3 Ne4 14.Ne4 Be4 15.Nf3 (15.f3 Qd8 16.fe4 Qh4=) 15...e5 16.de5 Ne5 17.Ne5 Be5 18.Be5 Qe5 19.Bd3 Rfd8 20.Qc2 Bd3 21.Qd3 Ra4 22.Rab1 Qe4 23.Rfd1 Qd3 24.Rd3 f5 25.f3 Kf7 26.e4 fe4 27.fe4 d4 28.Rc1 Ke6 29.Rc5 Rd6 30.Rh5 h6 ½–½. Ivanets,V RUS (2145) – Goriatchkin,J (2320), Khanty–Mansiysk RUS, 9th Governor Cup–B, 2013.

4.c3 e5 5.Bb2 Nf6 6.d4 ed4 7.ed4 ab4 8.cb4 d5 9.Nf3 Bg4 10.Be2 Nbd7 (10...Bd6 11.0-0=+) 11.Nbd2 Bf3 (11...Bd6 12.0-0=+) 12.Bf3 Bd6 13.0-0 0-0 14.Nb3 (14.Be2 Rfe8=+) 14...Rfe8-/+ 15.Nc5 Qc7 (15...Nc5? 16.dc5 Bc5 17.Bf6 Bb4 18.ab4 gf6 19.Qd2+-) 16.g3 Nb6 17.Be2 Nc4 18.Bc1 b6 19.Nd3 (19.Nb3!?-/+) 19...Ne4 20.Qc2 (20.Re1-/+) 20...h6 (20...Ned2!? 21.Re1 Re2 22.Re2 Nf3 23.Kg2 Nd4-+) 21.a4 (21.Re1 Qe7=+) 21...Qe7 22.Rb1 White plans b5 (better 22.Bf3!?-/+) 22...Ng3-+ 23.fg3 Qe2 24.Rf2 (24.Qc3-+) 24...Qc2 25.Rc2 Ra4 26.b5 cb5 27.Rb5 Ra5 28.Rb1 Re4 29.Bf4 (29.Bb2 Re3 30.Rd1 Ra2-+) 29...Bf4 30.Nf4 Rd4 31.Re2 Re4 32.Rc2 (32.Rb4 b5-+) 32...Kh7 33.Rf2 (33.Rbc1 Ne5-+) 33...f6 (33...d4 34.Nd3 Kg6 35.Rd1-+) 34.Rd1 Ne3 35.Rb1 b5 (35...Rb4 36.Rff1 Rab5 37.Rb4 Rb4 38.Ra1-+) 36.Rd2 (36.Rfb2 g5 37.Ng2 Nc4 38.Rb5 Ra2 39.Rd5 Rg2 40.Kg2 Ne3 41.Kf3 Nd5 42.Ke4 Nc3 43.Kf5 Nb1 44.Kf6 Nd2-+) 36...d4 37.Nd3 Nc4 38.Rf2 (38.Rdd1 Re3-+) 38...Re3 39.Rd1 Ra3 40.Nb4 d3 41.Nd5 Re5 42.Nb4 d2 (42...Rb3 43.Nc6 Re4 44.Nb8-+) 43.Rdd2 Nd2 44.Rd2 Rb3 45.Nc6 Rc5 46.Nd4 Rb4 47.Ne6 Re5 48.Nf8 Kg8 49.Nd7 Ree4 50.Nc5 Red4 51.Re2 Kf7 52.Ra2 (52.Kf2 Rbc4 53.Nb3 Rd3-+) 52...Rbc4 53.Ra7 (53.Nb3 Rd3 54.Nd2 Rcd4-+) 53...Kg6 54.Ne6 Rd2 55.Nf4 (55.Ra1 Rcc2 56.Nf4 Kf5-+) 55...Kf5 56.Ra1 Rdc2 (better 56...Rcc2!? 57.h3-+) 57.Nd3 (57.Nh5 Rc1 58.Rc1 Rc1 59.Kf2 b4-+) 57...R2c3 (57...Ke4 58.Nf2 Kf3 59.Nd3 Rg2 60.Kh1-+) 58.Rf1 Kg6 59.Nf4 Kf7 60.Rf2 (60.Kf2 Rc2 61.Ne2 Re4-+) 60...Rc1 (60...b4 61.Rd2 Rc1 62.Kf2-+) 61.Kg2 R1c2 62.Ne2 (62.Nd5 Rf2 63.Kf2 b4-+) 62...b4 63.Kf3 b3 64.Rf1 g5 (64...b2 65.Rb1 Ra4 66.Nf4-+) 65.g4 (65.Rb1 b2 66.Ke3-+) 65...b2 66.Rd1 Rb4 67.Rb1 Rb3 68.Kf2 Rh3 69.Kf1 Rh2 70.Ng1 (70.Kg1 Rhe2 71.Rd1 Rc1 72.Kf1 Rec2 73.Ke1 Rd1 74.Kd1 b1Q) 70...Rhf2 (70...Rc1 71.Rc1 bc1Q) 71.Ke1-+ Rc1 (71...f5 72.gf5 g4 73.Rd1 g3 74.Rd7 Ke8 75.Re7 Ke7 76.f6 Kf6 77.Ne2 b1Q 78.Nc1 Qc1) 72.Kf2 Rb1 73.Ne2 Rf1! 74.Kf1 b1Q 75.Kf2 Qe4 76.Ng3 Qg4 77.Nf1 h5 78.Ne3 Qf4 79.Ke2 h4 80.Ng2 Qe4 81.Kf2 h3 82.Ne3 h2 83.Nf1 (83.Nc4 Qd4 84.Kf1 h1Q 85.Ke2 Qhd1) 83...h1Q 84.Ng3 (84.Nd2 Qhe1) 84…Qhg2 (84...Qhe1) 0-1. Shimanov,A (2590) - Gurvich,Vitaly (2230), Titled Tue, 2020.

4.c3 e5 5.Nf3 e4 6.Nd4 c5 (better is 6...Nf6!?+=) 7.bc5+= Bc5 8.a4 Nf6 9.Ba3 Nc6 10.Bc5 Qc5 11.Qb3 0-0 12.Bb5 (12.Na3 d6=) 12...d5 13.0-0 Nd4 (13...Qd6 14.Na3=) 14.cd4= Qd6 15.Be2 b6 (15...Bg4 16.Nc3=) 16.Nc3+= Bd7 17.Rfc1 Rfc8 18.Nb5 (18.h3 Rab8=) 18...Bb5 19.Qb5 (worse is 19.ab5 Rc1 20.Rc1 a4–/+) 19...g6 20.h3 h5 21.Rab1 Kg7 22.Rc8 (22.d3 Rab8=) 22...Rc8 23.Qb6 Rc1 24.Bf1 Qb6 25.Rb6 Ra1 26.g4 hg4 27.hg4 Ng4 (27...g5 28.Rb5 Ra4 29.d3=) 28.Rb5= Ra4 29.Rd5 Ra1 (29...Ra2 30.Bh3 Nf6 31.Rc5=) 30.Kg2= Nf6 (30...f5 31.Rd7 Kh6 32.Be2=) 31.Rb5 a4 32.d3 (32.Rb7 Rc1=) 32...a3 33.de4 a2 (better is 33...Ne4 34.Ra5 Ra2+=) 34.Bc4?? (better is 34.Ra5 Ne4 35.Bc4+=) 34...Rg1!!–+ 35.Kg1 a1Q 36.Kg2 Ne4 37.Bd3 Qa8 38.Be4 Qe4 39.Kg1 Qd3 40.Rc5 Kh6 41.Kg2 f5 42.Kf3 Kg5 43.Re5 Qd1 44.Kg2 Kg4 45.Re6 g5 46.Rf6 f4 47.Rf7 f3 48.Kh2 Qf1 (48...Qf1 49.Rf3 Kf3 50.d5 Qg2) 0–1. Purczynski,Andrzej – Chojnacki,Wojciech, Poznan Poland, 2014.

4.c3 e6 5.Nf3 Nf6 6.Bb2 d5 7.Be2 Nbd7 8.0-0 c5 9.b5 Bd6 10.a4 0-0 11.c4 Qc7 12.h3 b6 13.d3 Bb7 14.Nbd2 Rad8 15.Qc2 e5 (15...Ne5 16.Rad1=) 16.cd5 Nd5 17.Rac1 (17.Nc4 Nb4 18.Qb3 Bd5=) 17...Qb8 (17...Nb4 18.Qb1=) 18.Ne4 (18.Nc4 Bc7=) 18...Nb4 19.Qc3 (19.Qd1 Bc7=) 19...Bc7 (better is 19...Na2 20.Qc4 Nc1 21.Rc1 Be7–/+) 20.d4?? (better is 20.Rcd1=) 20...Be4–+ 21.de5 (21.Rcd1 Bf3 22.Bf3 ed4 23.ed4 cd4 24.Qd4 Be5–+) 21...Bf3 (better is 21...Na2 22.Qc4 Nc1 23.Rc1 Bf3 24.gf3 Be5 25.Ba3–+) 22.e6 (22.gf3 Na2 23.Qc2 Nc1 24.Bc1 Be5 25.f4–+) 22...Be5 23.Qd2 Be2 24.Qe2 (24.Be5 Ne5 25.ef7 Rf7 26.Qe2 Ned3–+) 24...Bb2 (24...fe6 25.Ba3–+) 25.Qb2 (25.e7 Bc1 26.Rc1 Rfe8 27.ed8R Rd8–+) 25…Nd3 (26.Qc2 Qd6–+; better is 25...fe6 26.Qe2 Nf6–+) 0–1. Plock,Joerg – Schmidt,J, Neubrandenburg (15min), 2004.

4.c3 Nf6 5.Qb3 d5 6.d3 g6 (6...e5 7.Nf3 Bd6 8.Bb2–/+) 7.Nd2 Bg7 8.Bb2 0-0 9.Ngf3 Bg4 10.h3 Bf3 11.Nf3 Nbd7 12.d4 Qc7 13.b5 Rac8 14.Rc1 Ne4 15.c4 cb5 16.c5 (16.Qb5 e6 17.Qb3 a4=) 16...b6 (16...Ndc5 17.dc5 (worse is 17.Rc5 Nc5 18.dc5 Qc5–/+) 17...Nc5 18.Bg7 (18.Qb5? Bb2 19.Rc5 Qc5 20.Qb2 Qc3 21.Qc3 Rc3–+) 18...Nd3 19.Bd3 Qc1 20.Ke2 Qh1 21.Bf8+=) 17.Qd5 (17.c6 Nb8 18.Bb5 Qd6+=) 17...Ndf6 18.Qb3 bc5 19.Bb5 Qb6 20.a4 cd4 21.Nd4 Rc1 22.Bc1 Re8?? (better is 22...Rb8=) 23.Bd2?? (better is 23.Be8 Qb3 24.Nb3 Ne8 25.Bd2+–) 23...Nd2–+ 24.Kd2 Ne4 25.Ke2 Bd4 26.ed4 Qd4 27.Rf1? (better is 27.Qe3 Nc3 28.Kf3 Nb5 29.ab5 Qd5 30.Kg3 Qb5 31.Kh2–+) 27...Qd2 (27...Qd2 28.Kf3 Ng5 29.Kg4 h5 30.Kg3 Qd6 31.f4 Ne4 32.Kh2 Nd2–+) 0–1. Isler,Benjamin (1700) – Hilbig,Dieter (2065), Kiel Germany, Open–A, 2015.

4.c3 Nf6 5.Nf3 d5 6.Qc2 Nbd7 7.Be2 e5 8.0-0 ab4 9.cb4 Bb4! 10.Bb2 (10.ab4 Ra1) 10...Bd6 11.Nc3 0-0 12.Rfb1 Qc7 13.g3 e4 14.Nd4 Ne5 15.f4 Neg4 16.Kg2 h5 17.h3 Nh6 18.Qd1 Qd7 19.Qh1 Nf5 20.Nf5 Qf5 21.a4 g5 22.Bh5? (better is 22.g4 Qg6 23.Ba3 Ba3 24.f5–/+) 22...Nh5–+ 23.g4 Nf4! 24.Kf1 (24.ef4 Qf4) 24...Qh7 25.ef4 Bf4 26.Qg2 (26.Ba3 Bd2 27.Ne4 Qe4 28.Qe4 de4 29.Bf8 Kf8–+) 26...f5 27.Ke2 b6 (better is 27...fg4!? 28.h4 gh4 29.Rf1–+) 28.Rh1 (28.Ba3 fg4 29.h4–+) 28...d4 29.Nd1 Ba6 30.Ke1 c5 (better is 30...Qh4!? 31.Nf2–+) 31.h4 gh4 32.gf5 (32.Ra3 Bd3 33.Nf2–+) 32...Bg3 33.Nf2 Qf5 34.Rh2 (34.Kd1 Qf3 35.Qf3 ef3 36.Rg1–+) 34...Qg4 35.d3 Bd3 36.Kd2 (36.Qf1 Bf1 37.Kd2 Qe2 38.Kc1 Rf2 39.Rf2 Qe1 40.Kc2 Bd3 41.Kb3 Qb4 42.Ka2 Ra4 43.Ba3 Ra3) 36...Qe2 37.Kc1 0–1. combijack (1795) – daletedoy (1790), gameknot.com, 2012.

4.c3 Nf6 5.Nf3 d5 6.Qc2 e6 7.Bb2 =.

4.c3 Nf6 5.Nf3 d5 6.Qc2 Bg4 7.Be2 (7.Ne5 e6=) 7...e6 8.Bb2 Nbd7 9.d3 Bd6 10.Nbd2 Qc7 (10...e5 11.0-0=+) 11.h3= Bh5 12.0-0 0-0 13.e4 (13.Nb3 ab4 14.cb4 Bf3 15.Bf3 Be5=) 13...Bf4 14.Rfe1 Rfc8 (14...e5 15.c4=+) 15.c4 Ne5 (15...e5!?=) 16.Ne5+= Be2 (16...Be5 17.Bh5 Bb2 18.Bf7 (< 18.Qb2 Nh5 19.b5 Nf4=) 18...Qf7 19.Qb2+/–) 17.Re2 (17.Nc6!? Qc6 18.Re2 dc4 19.dc4 ab4 20.ab4 Ra1 21.Ba1 Bd2 22.Rd2 Qe4 23.Qd3 Qd3 24.Rd3+=) 17...Be5= 18.d4 (18.ba5 de4 19.Ne4 Ne4 20.de4 Rd8=) 18...Bf4 19.e5 Ne8 (19...Nd7 20.ba5 Qa5 21.Nb3=) 20.g3 Bh6 21.c5 ab4 22.ab4 Black creates threats along the open a–file 22...Ra1 23.Ba1 Ra8 24.Bc3 Qd8 25.h4 Nc7 26.f4 Nb5 27.Re1 Ra3 28.Nb1 Ra6 29.Bb2 Qa8 30.Kg2 Ra2 31.Rd1 g6 32.Rd3 Bf8 33.Nc3 Nc3 34.Qc3 Be7 35.Kh3 Qa6 36.Rf3?? Qe2–+ (37.Qe3 Qb2–+ (37...Rb2?! 38.Qe2 Re2 39.Ra3–+)) 0–1. Knobloch,Rainer – Rothsprach,Gerd, Mecklenburg VP LL2, 1997.

4.c3 g6 5.Bb2 Bg7 6.Qc2 d5 7.Nf3 Nd7 8.d4 Ndf6 9.Bd3 e6 (9...Nh6!?=) 10.Nbd2 Ne7 11.0-0 a4 12.c4 Qc7 13.Rfc1 0-0 14.Qd1 b6 15.Bc2 Bb7 16.cd5 Ned5 17.Ba4 Qd6?? (17...Nd7 18.g3+/-) 18.Nc4 (better 18.e4+-) 18...Qd8 19.Bb3 b5 (19...Ne4 20.Nfd2 Nd6 21.e4+/-) 20.Nce5 Rc8 21.Nd3 Ne4 22.Nd2 Nd2 23.Qd2 Re8 24.Nc5 Ba8 (24...Qe7 25.a4 ba4 26.Ra4+-) 25.e4 Nb6 26.f3 e5 27.d5?? (better 27.Rd1+-) 27...cd5= 28.ed5 e4?? (better 28...Bd5 29.Bd5 Qd5 30.Qd5 Nd5=) 29.Bg7+- Kg7 30.Qd4 Qf6 31.Qf6 Kf6 32.fe4 Rcd8 (32...Ke5 33.Rf1 f5 34.ef5 gf5 35.d6+-) 33.Kf2 (33.a4 ba4 34.Ba4 Na4 35.Ra4 Ke5+-) 33...Nd7 34.Nd7 Rd7 35.Kf3 (35.Bc2 Ke5 36.Bd3 Rb8+-) 35...Ke5 36.Rc5 f5 37.ef5 Kf5 38.Rb5 Rde7 39.Bc2 (better 39.Kf2!? Re2 40.Kg1 Rd2+-) 39...Kg5 40.Ba4?? (better 40.Bd1 Rf7 41.Kg3+-) 40...Re2 (40...Rf7 41.Kg3 Re3) 41.h4!+/- Kh4 42.Rh1 Kg5 43.Kg3 R8e3 44.Kh2 Ra3 45.d6?? (better 45.Ra5 Ra4 46.Ra4 Bd5 47.Rg1+/-) 45...Kg4 (better 45...Kf6 46.Rg1 Ra4-+) 46.Bd1+- Raa2 (46...Bf3 47.Be2 Be2 48.Rd5+-) 47.Re5 Kf4 (47...Bf3 48.Re2 Be2 49.d7+-) 48.Re2 Ra3 49.Rf1 Kg5 50.d7 Rd3 51.Ref2 (51.Re5 Kh6 52.Ba4+-) 51...Rd7 52.Rf8 Be4 53.R8f7 Rd2 (53...Rd5 54.Rh7 Rb5 55.Rh3+-) 54.Rh7 (better 54.Bf3!? Bf3 55.R1f3 Kh6+-) 54...Rg2 55.Kh3 Rd2 56.Re7 (better 56.Bf3 Rd3 57.Kg2+-) 56...Bg2= 57.Kg3 Bf1 58.Re6?? (better 58.Bf3=) 58...Rd1-+ 59.Re5 (59.b5 Kf5 60.Rc6 Rb1-+) 59...Kf6 60.Re3 (60.Rc5-+) 60...Rd3 61.Rf3 (61.Kf2 Re3 62.Kf1 Rb3-+) 61...Rf3 62.Kf3 Kf5 63.Kg3 g5 64.b5 Bb5 65.Kf2 Bc6 66.Kg1 g4 67.Kh2 (67.Kf2 Kf4 68.Ke1 g3 69.Ke2 Ke4 70.Kd2 g2 71.Kc3 g1Q 72.Kb3 Qc5 73.Kb2 Kd3 74.Kb1 Qc2 75.Ka1 Qc1 76.Ka2 Bd5) 67...Kf4 68.Kg1 g3 (68...g3 69.Kf1 Ke3 70.Ke1 g2 71.Kd1 Kd3 72.Kc1 g1Q 73.Kb2 Qd4 74.Kb1 Bd5 75.Kc1 Qa1) 0-1. norba94 (2190) - carlos78 (2210), Rated Blitz game, lichess.org, 2015.

4.c3 g6 5.d4 Bg7 6.Nf3 Nf6 7.Bd3 d5 8.Nbd2 ab4 9.cb4 Bf5 10.Bf5 gf5 11.0-0 Nbd7 12.Nb3 e6 13.Bb2 0-0 14.Qd3 Ne4 15.Rfb1 Qb5 16.Qb5 cb5 17.Ne5 (17.Nc5 Nb6+=) 17...Nb6+= 18.f3 Nd6 19.Na5 (19.Kf2!?+=) 19...Rfc8–/+ 20.Rc1 (20.Ra2 Na4 21.Rc1 b6–+) 20...Na4–+ 21.Rab1 Nc4 22.Nec4 bc4 23.Nb7 Nb2 24.Rb2 Ra3 25.Kf2 (25.Rd1 Re3 26.Nc5–+) 25...f4! (25...f4 26.Rd1 fe3 27.Ke2 e5–+) 0–1. arbab (1925) – deepthough (2180), gameknot.com, 2015.

4.c3 g6 5.Nf3 Bg7 6.d4 Nf6 7.Bd3 0-0 8.0-0 d5 9.Qc2 Nbd7 10.Nbd2 Re8 11.e4 e5 12.de5 Ne5 13.Ne5 Re5 14.Nf3 Re8 15.Be3 Qc7 16.ed5 Nd5 17.Bd4 Bg4 18.Be4 Bf3 19.Bf3 Bd4 20.cd4 Rad8 21.b5 cb5 22.Qc7 Nc7 23.Bb7 (better is 23.Rfd1!?+=) 23...Rd4–/+ 24.Rac1 Ne6 25.g3 Rb8 26.Bc8 Rd3 27.a4 Nd4 28.Rc5? (28.Ba6 Ne2 29.Kg2 Nc1 30.Rc1 Rb6 31.Bb5 Rd2–+) 28...b4 (28...Rc3 29.Rc3 Ne2 30.Kg2 Nc3 31.ab5 Rc8 32.Rc1–+) 29.Ba6 Rc3 30.Ra5 b3 31.Rd5 b2 (better is 31...Rb4–+) 32.Rd4= Rc1?? (32...b1Q 33.Rb1 Rb1 34.Kg2+=) 33.Rdd1?? (better is 33.Bd3+–) 33...Rd1+= 34.Rd1 b1Q 35.Rb1 Rb1 36.Kg2 Rb3 37.h4 Kg7 38.f3 f5 39.Bb5 Kf6 40.f4 h6 41.Be8 Ra3 42.Kf2 g5 43.h5? gf4–+ 44.gf4 Ke7 45.Bc6 Kd6 46.Be8 Kd5 47.Bd7 Ke4 48.Bc6 Kf4 0–1. combijack (1775) – yellowlab (1865), gameknot.com, 2010.

4.Qf3 ab4+= 5.Bc4 (5.Ne2 d5–/+ 6.d4 Qa5 7.c3 bc3 8.Nbc3 Nf6 9.Bd2; 5.d4 e6 6.a4 b3 7.cb3 Qb3 8.Ne2 Bb4 9.Nd2) 5...d5–/+ 6.Be2 ba3 (6...Nd7 7.Nh3 e5 8.Ra2 Ngf6 9.Rb2) 7.Ba3 (7.Na3 Nd7–/+ 8.Ra2 Ra4 9.Nh3) 7...Nf6 (7...Ra3 8.Na3 Qb2 9.Rb1 Qa3 10.Qf4–+) 8.Bd3 (8.Qf4 Nbd7 9.Nf3 e5 10.Ne5 Ra3 11.Nd7 Qb2 12.Nf6 gf6–/+) 8...Bg4 (8...e5 9.Qd1–+ (9.Qg3 Nbd7 10.Nh3 Ba3 11.0-0–+)) 9.Qf4 (9.Qg3–/+) 9...Nbd7 10.h3?? (better is 10.Nf3–/+) 10...e5–+ 11.hg4 (11.Qg5 Ba3 12.Nc3–+) 11...ef4 12.g5 Ne4 13.Be4 de4 14.ef4 (14.g6 fg6 15.ef4 Ba3 16.Na3 Qb2–+) 14...Ba3 15.Ne2 (15.Na3 Qb2 16.Rb1 Qa3–+ (16...Ra3?! 17.Rb2 b5 18.Ke2+=)) 15...0-0 (better is 15...Qb2 16.Nec3 Qa1 17.0-0–+) 16.0-0 (16.Nbc3 Rfe8 17.Rb1 Qa7–+) 16...Bd6 (16...Bc5!? 17.Nbc3 Bf2 18.Kh1–+) 17.Ra8 Ra8 18.Nec3 Bf4 (18...Nc5 19.f5–+) 19.Ne4 Ra1 20.g3 Rb1 21.gf4 Rf1 22.Kf1 Qb1 23.Kg2 Qc2 24.Kf3 f6 (24...Qd3 25.Kg2 Qe4 26.Kg3–+) 25.gf6 Nf6 (25...Qd3 26.Kg2 Qe4 27.f3 Qe2 28.Kg3 Qe1 29.Kh2 Qf2 30.Kh3 Qf3 31.Kh2 Nf6 32.f5 Ng4 33.Kg1 Qg3 34.Kf1 Qf2) 26.Nf6 gf6 27.Ke2 Qe4 (better is 27...b5 28.Ke3–+) 28.Kf1 Qf4 29.Ke2 h5 0–1. Eries – Bull_Dog_Baz, ChessWorld.net, 2009.

5.Bb2 d6 A) 6.Nf3 e5 (6...Nf6 7.Bc3 Qh5 8.Bf6 ef6 9.d4 d5 10.c4 dc4=) 7.Be2 Nf6 8.Bc3 Qa4 9.Bb2 Bf5 10.d3 Be7=; B) 6.f4 Nf6 (6...e5 7.Bc3 Qd5 8.Nf3 ef4 9.ef4 Ne7 10.Be2 Qf5=) 7.Nf3 Nbd7 8.Bc4 e5 9.fe5 Ne5 10.Bc3 Qc7+=; C) 6.Be2 e5 (6...Nf6 7.f4 e5 8.Nf3 e4 9.Nd4 Be7 10.Nc3 0-0=) 7.Nf3 Nf6 8.a4 Be7 9.Na3 e4 10.Nc4 Qc7+=; D) 6.c4 e5 7.Bc3 Qa4 8.Qa4 Ra4 9.d4 e4 10.Bb2 Nf6=.

5.Bb2 e5 A) 6.Be2 Nf6 (6...d6 7.Nf3 e4 8.Nd4 Qg5 9.Bf1 d5 10.d3 Nf6=; 6...e4 7.Nh3 d5 8.Nf4 Nd7 9.0-0 Ngf6 10.d3 b5=) 7.Nf3 e4 8.Nd4 d5 9.Nc3 Bd6 10.0-0 0-0+=; B) 6.Bc3 Qd5 (6...Qc7 7.d4 e4 8.d5 Nf6 9.Bf6 gf6 10.c3 Qd6=) 7.Nf3 d6 8.a4 Nf6 9.a5 Be7 10.Na3 Qe6=.

5.Bb2 Nf6 A) 6.c4 d6 (6...d5 7.Bc3 Qd8 8.d4 Bf5 9.Qb3 b6 10.cd5 Nd5=; 6...e5 7.Bc3 Qc7 8.d4 e4 9.Nd2 Be7 10.c5 d6+=) 7.Bc3 Qf5 8.d4 e5 9.Nd2 Be7 10.Qb3 0-0+=; B) 6.Nf3 d6 (6...d5 7.Be2 Nbd7 8.0-0 Qb6 9.Ra2 Qc7 10.c4 e5=) 7.Bc3 Qc7 8.Be2 e5 9.0-0 Be7 10.Bb2 0-0+=.

5.c4 d5 6.Bb2 Nd7 7.Nf3 Nb6 8.Bc3 Qa4 9.Qa4 Na4 10.d4 (10.cd5 cd5 11.Ne5 Nh6=) 10...Be6 (10...dc4 11.Bc4 Nc3 12.Nc3=) 11.c5 Bf5 12.Nfd2 (12.Bd2 Nf6=) 12...e6 13.Be2 Nf6 14.0-0 Ne4 (better is 14...Be7=) 15.Rc1?? (better is 15.Ne4 Be4 16.Rc1=) 15...Nac3–+ (15...Nec3?! 16.Nc3 Be7 17.Ra2=) 16.Kf1? (better is 16.Rc3 Nc3 17.Nc3–+) 16...Ne2 (16...Ne2 17.Ke2 Be7–+) 0–1. marnzell – blackcrowman, ChessWorld.net, 2009.

5.c4 d5 6.Nf3 Bg4 7.h3 Bf3 8.Qf3 Nf6 9.Nc3 dc4 10.Bc4 Nbd7 11.Qg3 Qe5 (11...b5 12.Be2=) 12.0-0 (12.Qe5!? Ne5 13.Be2=) 12...Qg3=+ 13.fg3 e6 14.d4 Bb4 15.Bb2 Bd6 16.g4 Nb6 17.Bd3 Nfd5 18.Ne4 Be7 19.Kf2 0-0 20.Nc5 Bc5=+ 21.dc5 Nd7 22.Rfc1 Ra5 23.e4 Nf4 24.Bf1 Nc5 25.Ke3 Ng6 26.Bc3 Ra4 27.Bb4 Nb3–+ 28.Bf8 Nf8 29.Rcb1 Na1 30.Ra1 b5 31.Rc1 Ra3 32.Bd3 Ng6 33.Rc6 Rd3! 34.Kd3 Ne5 35.Kd4 Nc6 36.Kc5 b4 37.g5 0–1. BigSky (2705) – duckbreath (2520), ICC, 1998.

5.c4 d6 6.Bb2 e5 7.Bc3 Qa4 8.Qa4 Ra4 9.d4 e4 10.Bd2 Nf6 =.

5.c4 e5 6.Bb2 Nf6 (6...d6 7.Bc3 Qa4 8.Qa4 Ra4 9.d4 e4 10.Nd2 Nf6=) 7.Bc3 Qc7 8.d4 e4 9.Nd2 Be7 10.c5 d6 +=.

5.c4 e6 6.Bb2 (6.Nf3 d5 7.Bb2 Nf6 8.cd5 Nd5 9.Bd3 Nd7 10.Qc2 N5f6=) 6...d5 (6...d6 7.Bc3 Qa4 8.Qa4 Ra4 9.d4 Nf6 10.Bb2 b6=; 6...Nf6 7.Nf3 d5 8.cd5 Nd5 9.Bd3 Nd7 10.Qc2 N5f6=) 7.Nf3 (7.Bc3 Qa4 8.Qa4 Ra4 9.c5 Nd7 10.d4 e5=) 7...Nd7 8.Be2 (8.Bc3 Qa4 9.Qa4 Ra4 10.Bb2 Ngf6=) 8...Ngf6 (8...dc4 9.Bc4 Ngf6 10.Qc2 Bd6=) 9.0-0 (9.cd5 ed5 10.Bc3 Qa4=) 9...Bd6 10.d4 Qc7 (10...dc4 11.Bc4 0-0 12.Qc2=) 11.a4 (11.c5 Be7+=) 11...Ne4 (11...b6 12.Ba3=) 12.Ba3 (12.c5 Be7+=) 12...0-0 13.Qc2 b6 14.Bd3 f5 15.Rc1 (15.Bd6 Qd6 16.Nbd2 Ba6=) 15...Bb7 16.Nc3 Ba3 17.Ra3 Qd6 18.Qb3 Kh8 19.Ra2 c5 (19...Nc3 20.Qc3 c5 21.Be2=) 20.Nb5+= Qb8 21.Nd2 cd4 22.ed4 Qf4 23.Be4 fe4 24.Qe3 Qh4 (24...Qe3 25.fe3 e5 26.de5 Ne5 27.Nd6+=) 25.Nd6 (25.Nc7 Rac8 26.Ne6 Rf6+/–) 25...Bc6+= 26.cd5 Bd5 27.Ra3 Nf6 28.h3 Rad8 29.Nb5 Ba8 (29...Ra8 30.Rb1+=) 30.Nc4+= Nd5 31.Qg3 Qh6 32.Re1 Nf4 33.Nb6 e3 (33...Nd3 34.Re3+=) 34.fe3+/– (34.Qe3 Bg2 35.Qe5 Qh4–+ (35...Bh3?! 36.Rg3+=); 34.Na8?! Nh3 35.gh3 ef2 36.Qf2 Rf2 37.Kf2 Ra8+=) 34...Ng2 35.Re2 Nh4 36.Na8 Ra8 37.Rf2 Rf6 38.Rf4 (38.Nd6 Rf2 39.Qf2 Qg5 40.Kh2 Qe7+/–) 38...Rf4 (38...Nf5 39.Qg2 Rc8 40.Rc3=) 39.ef4+= (39.Qf4 Qg6 40.Qg4 Qb1 41.Kh2 Rf8–+) 39...Qh5? (better is 39...Rf8+=) 40.Qg4+– Qh6 41.a5 (41.Nc7 Rf8 42.Ne6 Rb8+–) 41...g5? (41...Rf8 42.a6 Rf4 43.a7 Rg4 44.hg4 Qc1 45.Kh2 Qd2 46.Kh3 Qg2 47.Kh4 Qh2 48.Rh3 Qf2 49.Kh5 Qf7 50.Kh4 Qf2 51.Rg3 Qh2 52.Rh3 Qf2=) 42.a6?? (better is 42.fg5 Qg6 43.Ra1+–) 42...Qg6+/– 43.f5 (43.Kf2 Rf8 44.Qe2 Rf4 45.Kg3 Qb1=) 43...ef5+= 44.Qe2 Re8 45.Re3 (better is 45.Qb2 Re1 46.Kf2+/–) 45...Re3+= 46.Qe3 Qa6 47.Qe8 (47.Qe5 Kg8 48.Qd5 Kg7+=) 47...Kg7–/+ 48.Qe7 Kg6 49.Qe8 Kg7 50.Qe7 Kh6 51.Qf8 Kh5 52.Qe8 Ng6 53.Qe2 Kh6 54.d5? (better is 54.Qf1 Qe6 55.Kh2–+) 54...Nf4 55.Qc4 Qa1 56.Kf2 Qb2 57.Ke3 Qe5 58.Kf3 (58.Kd2 Nd5 (worse is 58...Nh3 59.Qd4 Qd4 60.Nd4–+; 58...Qd5 59.Qd5 Nd5 60.Nd4–+) 59.Qd4 Qh2 60.Kd1 Qh1 61.Kd2 Qg2 62.Ke1 f4–+) 58...Nd5 (58...Nh3 59.Kg2 Qe3 60.Qc6 Kh5 61.Qc2 Nf4 62.Kf1 Qf3 63.Qf2 Qd3 64.Ke1 Qb1 65.Kd2 Qb2 66.Ke3 Nd5 67.Kf3 g4 68.Kg2 Ne3 69.Kg1 Qc1 70.Kh2–+) 59.Qd4 (59.Qd3 Kg6–+) 59...Qh2 0–1. Kutuzov,Denis (2290) – Tarlev,Konstantin (2450), Open Moscow RUS, 2007.

5.c4 Nf6 6.Nf3 e6 7.Be2 Be7 8.Nc3 d5 9.0-0 0-0 10.Qc2 Nbd7 11.d4 Qc7 12.e4 de4 13.Ne4 Ne4 14.Qe4 Nf6 15.Qc2 c5 16.Rd1 Bd7 17.Be3? (17.Qb2 Ba4 18.Rd3 cd4 19.Nd4 Bd6+=) 17...cd4 (17...Ba4 18.Qd3 Bd1 19.Bd1–+) 18.Bd4? (better is 18.Rd4 Ra3 19.Ra3 Ba3 20.Bf4+=) 18...Ba4–+ (18...Ba3 19.Qd3 Ba4 20.Ra3 Bd1 21.Ra8 Ra8 22.Bd1+/–; 18...Ra3? 19.Ra3 Ba3 20.Bf6 gf6 21.Qd3+–) 19.Qd3 Bd1 20.Bd1 Rfd8 21.Bc2 Bc5 22.Qc3 Bd4 23.Nd4 Rac8 24.Bb3 Qc5 25.Nf3 b5 26.h3 bc4 27.Bc2 Nd5 28.Qe1 Nf6 29.a4?? (29.Qc3 Qd6 30.a4–+) 29...h6 30.a5 Ra8 31.Qc3 Ra6 32.Nd2 Rda8 33.Nb3? Qc7 34.Ra4 Rc8 35.Nd2 Nd5 36.Qd4 c3 37.Nb3 Qa7 38.Qd3 Rb8 39.Qh7–/+ Kf8 40.Qh8 Ke7 41.Qg7 Rb5 42.Nd4 Qc5 43.Bg6+= (43.Bg6 Rb2 44.Qf7 Kd8 45.Qe6+–) 1–0. combijack (1770) – vinbiko (1660), gameknot.com, 2011.

5.Nf3 d6 A) 6.Nc3 e5 (6...Nf6 7.Bb2 e5 8.Be2 Be7 9.e4 0-0 10.0-0 Nbd7=; 6...Bd7 7.Be2 e5 8.Bb2 Nf6 9.0-0 Be7 10.e4 0-0=; 6...e6 7.Bb2 e5 8.Be2 Nf6 9.0-0 Be7 10.e4 Bg4=) 7.Be2 Nf6 8.Bb2 Be7 9.0-0 0-0 10.e4 Nbd7=; B) 6.Bb2 e5 7.a4 Nf6 8.Na3 Qd8 9.Nc4 Nbd7 10.a5 e4+=; C) 6.e4 e5 (6...Nf6 7.Nc3 e5 8.Be2 Nbd7 9.Rb1 d5 10.ed5 Nd5+=) 7.Nc3 Nf6 8.Bb2 Nbd7 9.Bc4 b5 10.Ba2 Nc5+=; D) 6.Be2 e5 7.Bb2 Nf6 8.0-0 Be7 9.c4 0-0 10.Nc3 Bf5=.

5.Nf3 e5 6.Bb2 e4 7.Nd4 Nf6 8.Bc3 Qc7 9.Nf5 d5 10.Bf6 Bf5 +=.

5.Nf3 e6 6.Be2 Nf6 7.0-0 g6 (7...d5 8.Bb2=) 8.d4+= Bg7 9.Nbd2 0-0 10.c4 d5 11.c5 b6 12.Nb3 Qa7 13.cb6 Qb6 14.Bd2 Ne4 15.a4 (15.Bb4 Re8+=) 15...Nd2 (15...Ba6 16.a5 Qb7 17.Rb1=) 16.Nfd2 (16.Qd2 Qb3 17.Rfb1 Ra4 18.Rb3 Ra1 19.Bd1 Nd7=) 16...Ba6 17.a5 Qa7 18.Ba6 Na6 19.Qc2 c5 20.Rab1 (20.Nc5 Nc5 21.dc5 Ba1 22.Ra1 Rfb8=+) 20...cd4 (20...c4 21.Nc1-/+) 21.Nd4 Bd4 22.ed4 Qd4 23.Nf3 Qc5 24.Qd2 Rfb8 25.Rbc1 (25.Ne5 Qc7 26.Ng4 Qc4=+) 25...Qb4-/+ 26.Qh6 Qf8 (26...Qa5? 27.Ng5 Ra7 28.Qh7 Kf8 29.Ne6 fe6 30.Qa7+-) 27.Qf4 (27.Qf8 Kf8 28.Ne5 Rb5-/+) 27...Nc5 28.Ne5 f6 (28...Rb5!?-+) 29.Rc5 fe5 30.Qc1 Rc8 31.Rc8 Rc8 32.Qb2 e4 33.a6 Qc5 34.h3 Ra8 (34...Rf8 35.Ra1 Qa7 36.Ra2=+) 35.Ra1 (35.Rc1!? Qa5 36.Rc6=) 35...e3=+ 36.fe3 Qe3 37.Kh1 h5?? (better 37...Qa7=+) 38.a7+- Qf4 (38...Qc5 39.Qb8 Qf8+-) 39.Qb7 Qf8 40.Rb1 Rd8 41.Qb8 1-0. cipiripi (2400) - zumpili (2345), Rated Blitz game, lichess.org, 2018.

6.Bc3 Qc7 7.Nf3 Bg4 8.h3 Bh5 9.Be2 Nd7 10.0-0 Ngf6 11.Ng5 Be2 12.Qe2 e5 13.d3 Bd6 14.Nd2 0-0 (14...Ba3 15.Nb1+–) 15.Bb4 h6 16.Ngf3 c5 17.Bc3 e4 18.de4 de4 19.Ne1 Be5 20.Be5 Ne5 21.Nc4 Nd5 22.Ne5 (better is 22.Nb2–/+) 22...Qe5–+ 23.Ra2 (23.Qd1 Nc3 24.f4 ef3 (24...Nd1?! 25.fe5 Ne3 26.Rf2–+) 25.Qf3 Ne2 26.Qe2 Qa1–+) 23...Nc3 (23...Nc3 24.Qc4 b5–+) 0–1. islanderfan (2130) – rirons (2340), net–chess.com, 2012.

6.Bc3 Qd8 7.Nf3 b5 =.

6.Be2 Nd7 (6...b5 7.Nf3 f6 8.0-0 e5 9.d3 Bd6 10.c4 Ne7=; 6...Nf6 7.Nf3 Nbd7 8.0-0 b5 9.d3 e6 10.c4 Bd6=; 6...f6 7.f4 b5 8.Nf3 Bf5 9.0-0 Nh6 10.Nd4 Bd7+=; 6...Qc7 7.f4 b5 8.Nf3 Nd7 9.Nc3 e5 10.fe5 Ne5=) 7.f4 Ngf6 8.Nf3 e6 9.0-0 Bd6 10.Be5 Be7+=.

6.Nf3 Nf6 7.Bc3 Qd8 =.

6.Nf3 Nf6 7.Be2 Nbd7 8.0-0 e6 9.Bc3 Qc7 10.Bf6 Nf6 +=.

6.Nf3 Bg4 7.c4 e6 8.cd5 cd5 (8...ed5 9.Be2=) 9.h3 Bh5 10.Qb3 Nd7 11.Bb5 (11.Qb7 Rb8 12.Bc3 Qa4+=) 11...Qc7 12.Ne5 Ngf6 13.g4 Bg6 14.d3?? (better is 14.g5!? Bc2 15.Qc3 Qc3 16.Bc3+– (16.Nc3?! Bd6 17.Rc1 Be5 18.Rc2 Bc3 19.Rc3 Ne4+/–)) 14...Bd6 (14...Kd8 15.Ng6 hg6 16.g5=) 15.Bd7 (15.Nd7!? Nd7 16.Bg7+/–) 15...Nd7= 16.Nd7 Kd7 17.Qb5 (17.Nd2 Rhb8=) 17...Ke7 (17...Qc6 18.Qb3+=) 18.Nd2 (18.Bg7!? Rhc8 19.Bc3=) 18...Ra5 19.Qb3 f6 20.Bc3 Ra6 21.Bb4 Rd8 (21...Bb4 22.Qb4 Kf7 23.Ke2+=) 22.Nf3 Rb6 23.Nd4 Bb4 24.ab4 Rc8 25.h4 White prepares b5 (25.f4+=) 25...Qc3= Attacking the isolated pawn on b4 26.Qc3 Rc3 27.h5 Bf7 (worse is 27...Bd3 28.Kd2 Rc4 29.Kd3 Rbb4 30.Rab1+/–) 28.Kd2 Rc7 29.b5 Be8 30.f4 Bd7 31.Ra5 (31.h6 g6=) 31...e5+= 32.Nf5 Bf5 33.gf5 ef4 34.ef4 h6 (34...d4 35.Re1 Kf7 36.Rc1 Rc1 37.Kc1–/+) 35.Rg1 Kf7 36.Ke3 Rc5 37.Rb1 Ke7 38.Kd4 Kd6 39.Rb2 Rc1 40.Ra8 Rf1 41.Rd8 Ke7 42.Rd5 Rd6 43.Re2 Kd7 44.Rd6 Kd6 45.Ke4 Rb1 46.Rg2 Re1 47.Kd4 Re7 (47...Rf1 48.Ke3 Re1 49.Kf2 Re7=) 48.Rg1+/– Kc7 (48...Rc7 49.b6 Rd7 50.Rc1+–) 49.Kc5+– b6 50.Kd5 Rd7 51.Ke6 Kd8 52.Rg2 Ke8 53.Ra2 Re7 54.Kd6 Rd7 55.Kc6 Rd3 56.Ra8 (56.Kb6 Rd4+–) 56...Ke7 57.Ra7 (57.Kb6?! Rg3+–) 57...Kf8 58.Kb6 (58.Kb6 Rh3 59.Ka6 Ra3 60.Kb7+–) 1–0. WaterDragon – arturo, ChessWorld.net, 2008.

6.Nf3 Bg4 7.h3 Bf3 8.Qf3 Nf6 9.c4 Nbd7 10.Bc3 Qa4 =.

6.Bb2 A) 6...Nd7 A1) 7.Bc3 Qc7 (7...Qd8 8.d4 e6 9.Bd3 Ngf6 10.Bb2 Bd6 11.Nbd2 0-0=) 8.d4 e6 9.Bd3 Ngf6 10.0-0 Bd6 11.a4 b6+=; A2) 7.Be2 Qc7 (7...b5 8.0-0 Ngf6 9.d3 e6 10.c4 Bd6 11.Bc3 Qa6=; 7...Ngf6 8.0-0 Qc7 9.c4 dc4 10.Bc4 e6= 11.Qc2 Bd6=) 8.c4 dc4 9.Bc4 e5 10.Qc2 Bd6 11.Ng5 Nh6=; B) 6...b5 B1) 7.Bd3 Nd7 8.e4 Nc5 9.Qe2 Nd3 10.Qd3 de4 11.Qe4 Bb7=; B2) 7.Be2 f6 (7...Nd7 8.0-0 Ngf6 9.d3 e6 10.c4 Bd6 11.Bc3 Qa6=; 7...Nf6 8.Bc3 Qd8 9.0-0 Nbd7 10.d3 e6 11.Bb2 Bd6=) 8.Bc3 Qc7 9.d4 Nd7 10.Bd3 e5 11.de5 fe5+=; B3) 7.Nc3 Nf6 (7...f6 8.d4 Nd7 9.Bd3 e5 10.e4 c5 11.a4 Qb4=; 7...Nd7 8.e4 e6 9.ed5 ed5 10.a4 b4 11.Nb5 Ngf6=) 8.a4 b4 9.Nb5 (9.Ne2 c5 10.Ng3 c4 11.Be2 c3+=) 9...Nbd7 10.Be2 (10.Bf6 ef6 11.Nbd4 Ne5=) 10...Bb7= 11.Nbd4 e5=; C) 6...Bg4 C1) 7.Be2 Nd7 (7...e6 8.0-0 Nf6 9.Bf6 gf6 10.Nd4 Be2 11.Qe2 Nd7=; 7...Nf6 8.Bc3 Qd8 9.0-0 e6 10.h3 Bf3 11.Bf3 Bd6+=; 7...f6 8.h3 Bf3 9.Bf3 e5 10.0-0 Bd6 11.e4 Ne7=) 8.0-0 Ngf6 9.d3 e6 10.Bc3 Qc7 11.h3 Bf3+=; C2) 7.h3 Bf3 (7...Bh5 8.Be2 e6 9.Nc3 Nf6 10.g4 Bg6 11.Ne5 Bd6=; 7...Bf5 8.Be2 e6 9.0-0 Nd7 10.Nh4 Nh6 11.d3 Nc5=) 8.Qf3 Nd7 9.c4 e6 10.cd5 ed5 11.e4 Ngf6=; D) 6...Nf6 7.Be2 (7.Bd3 Nbd7 8.Bc3 Qc7 9.0-0 e5 10.Bf5 Bd6 11.d3 0-0+=; 7.Bc3 Qd8 8.Be2 b5 9.0-0 e6 10.Bb2 Bd6 11.Be5 Be5+=) 7...Bg4 (7...Nbd7 8.0-0 Qc7 9.c4 dc4 10.Bc4 e6 11.Qc2 Bd6=) 8.Bc3 Qd8 9.Bf6 ef6 10.Nd4 (10.0-0 Bd6= 11.Nd4 Bd7=) 10...Bd7 11.0-0 Bd6=.

6.Be2 b5 A) 7.Nc3 Nd7 (7...e5 8.Ne5 Bd6 9.Nf3 Nf6 10.Bb2 Ra7 11.Nd4 Bd7+=) 8.Nd4 Qc7 9.f4 e5 10.fe5 Ne5 11.Bb2 Nf6+=; B) 7.Bb2 f6 8.Bc3 Qc7 9.d4 Nd7 (9...Bf5 10.Nh4 Bd7 11.Bd3 Nh6=) 10.Bd3 e5= 11.de5 fe5=; C) 7.0-0 Nf6 (7...Nd7 8.Bb2 Ngf6 9.d3 e6 10.c4 Bd6 11.Bc3 Qa6=) 8.Bb2 Nbd7 9.d3 e6 10.c4 Bd6 11.Bc3 Qa6=.

6.Be2 Nd7 7.Bb2 Ngf6 (7...b5 8.0-0 Ngf6 9.d3 e6 10.c4 Bd6 11.Bc3 Qa6=) 8.0-0 e6 (8...Qc7 9.c4 dc4 10.Bc4 e6= 11.d4 Bd6=) 9.c4 dc4 10.Bc4 Bd6 11.d4 0-0 =.

6.Be2 Bf5 7.0-0 Nf6 8.Bb2 (8.Nc3 e6=) 8...Nbd7 9.Ne5 (9.Nd4 Bg6 10.Nc3 Qb6+=) 9...Ne5 10.Be5 e6 11.f4 h5 12.Bf6 (12.Bd3!?+=) 12...gf6–/+ 13.Bh5 Qa4 14.Ra2 d4 15.Bg4 (15.Qe2 Bc2 16.Rb2 Bb3–/+) 15...Bg4 (15...0-0-0!? 16.Bf5 Qc4–+ (16...ef5?! 17.Qe2+=)) 16.Qg4–/+ Bc5 17.Re1 Ke7 (17...Qc4!? 18.Rb2 de3 19.de3 0-0-0–/+) 18.Rb2+= b6 19.Qd1?? (better is 19.Qf3+=) 19...de3–+ 20.de3 Qf4 21.Qf3 Qh2 22.Kf1 Qe5 (22...Rh5!? 23.g4 Rg8 24.Re2–+) 23.Rb3 Rad8 24.Qc6 (24.Nc3–+) 24...Qf5 25.Qf3 (25.Kg1 Qc2 26.Qc7 Ke8 27.Qd8 Kd8–+) 25…Qc2 (25...Qc2 26.Qe2 Qb3–+) 0–1. Ivanets,Vladimir (2265) – Postnikov,Daniil, Khanty Mansiysk Governor Cup, 2007.

6.Be2 Nf6 A) 7.0-0 A1) 7...b5 8.d3 e6 9.Bd2 Qa7 10.c4 bc4 11.dc4 Be7=; A2) 7...Bg4 8.d4 (8.Bb2 Nbd7 9.d3 e6 10.c4 Bd6 11.Nbd2 0-0+=) 8...e6 9.a4 (9.Bd3 Bd6 10.h3 Bh5 11.Nbd2 b5+=) 9...Bb4 10.Bd2 Bf3= 11.Bf3 0-0=; A3) 7...Nbd7 8.Bb2 e6 9.Bc3 Qc7 10.d4 b5 11.Bd2 Bd6+=; B) 7.Bb2 Nbd7 8.a4 e6 9.0-0 Bb4 10.Bc3 Bc3 11.Nc3 e5+=.

6.Be2 Bg4 A) 7.Bb2 Nd7 (7...Nf6 8.Bc3 Qa4 9.Bf6 ef6 10.Nc3 Qa5 11.Nd4 Bd7=) 8.0-0 Ngf6 9.d3 e6 10.Ne5 Ne5 11.Be5 Be2+=; B) 7.0-0 Nf6 (7...e6 8.Bb2 Nf6 9.Bf6 gf6 10.Nd4 Be2 11.Qe2 Nd7=; 7...Nd7 8.Bb2 Ngf6 9.Ne5 Be2 10.Qe2 Ne5 11.Be5 Nd7=; 7...Bf3 8.Bf3 e5 9.e4 de4 10.Be4 Nf6 11.Nc3 Bd6=) 8.Bb2 Nbd7 B1) 9.d3 e6 10.Ne5 (10.Nbd2 Bd6= 11.Nd4 Be2+=) 10...Ne5 11.Be5 Be2+=; B2) 9.Ne5 Be2 10.Qe2 Ne5 11.Be5 Nd7=.

6.Bb2 d5 7.Be2 Bf5 8.0-0 Nbd7 9.c4 h6 (9...dc4 10.Bc4 e6 11.d3=) 10.cd5 cd5 (10...Qd5 11.Nc3 Qd6 12.d4+=) 11.Nc3 e6 12.h3 (12.Nd4 Bh7+=) 12...Be7= 13.Nd4 Bg6 14.f4 0-0 (14...Bh7 15.Nb3 Qd8 16.Rc1=) 15.f5 ef5 16.Nf5 Rfe8 17.g4 (17.Bb5 Bf8+=) 17...Nb6 (17...Bc5 18.Kg2=) 18.Bd3 (18.Qb3!?=) 18...Nc4=+ Increasing the pressure on the isolated pawn on a3 19.Bc4 (19.Qc1 Bf5 20.Rf5 Qd8=+ (worse 20...Na3 21.Nb1+/-)) 19...dc4-/+ 20.Qe2 b5 21.Rac1 (21.a4 b4 22.Nb5=) 21...Ba3 (better 21...Rad8-/+) 22.Ba3+= Qa3 (22...Bf5 23.gf5 Qa3 24.Nb5+=) 23.Nb5 Qc5 (better 23...Qa5 24.Nbd6 Re6 25.Rc4 Qb6+/-) 24.Nbd4 (24.Nbd6 Re6 25.Qc4 Qa5+/-) 24...Qe5 (24...Rac8!?=) 25.Rc4 Ne4 26.Qg2 Ra2 27.Rc2 Rc2 28.Nc2 Bf5 29.gf5 Qd6 30.Nd4 Nf6 31.Rf4 (better 31.Kh1+/-) 31...Qb4?? (31...Rb8 32.Qc6 Qe5 33.Qc2+=) 32.h4?? (better 32.Ne6 Qb1 33.Rf1 Qf1 34.Qf1 fe6 35.Qc4+-) 32...Ra8?? (32...Qb1 33.Qf1 Qb4 34.Qc1+=) 33.Kh2 (better 33.Qa8 Kh7 34.Qg2+-) 33...Ra2= 34.Ne6?? (better 34.Rf2=) 34...fe6 (better 34...Qd2 35.Qd2 Rd2 36.Kg1 fe6 37.fe6 Rd6-+) 35.Rb4+- ef5 36.Rb8 (36.h5 Ng4 37.Rg4 fg4 38.Qd5 Kh7 39.Qa2 g3 40.Kg3 g5 41.Qf7 Kh8 42.Qg6 g4 43.Qh6 Kg8 44.Qf6 Kh7 45.h6 Kg8 46.Qg7) 36...Kh7 37.Rb7 Ng4 38.Kh3 h5 (38...Ra8 39.Qd5 Kh8 40.Qf5+-) 39.Qd5 (39.Qd5 Ra6 40.Qf5 Rg6 41.Qh5 Nh6 42.Qb5+-) 1-0. onxisback (2035) - sezwho (2030), Rated Bullet game, lichess.org, 2013.

6.Bb2 d6 7.Bc3 Qh5 8.Bf6 ef6 9.d4 d5 10.c4 dc4 =.

6.Be2 e5 7.0-0 e4 8.Nd4 d5 9.c4 dc4 10.Bc4 Bd6 11.Qc2 Na6 12.Bb2 Qh5 13.f4 Nc5 14.a4 0-0 15.Ba3 Rd8 16.Nc3 Ng4 17.h3 Nf6 18.f5 Re8 19.Nce2 Re5 Can f5 get defended? (worse is 19...Ra4 20.Bc5 Ra1 21.Bd6+/–) 20.Nf4 Qh6 21.a5 Nfd7 (21...Bf5 22.Bf7 Kh8 23.Nf5 Rf5 24.Ng6 hg6 25.Rf5 gf5 26.Bc5=) 22.Bb4 Na6 23.Bc3 Nf6 24.Qa4 Nc5 (24...Bf5 25.Bf7 Kh8 26.Nd3 Bh3 27.Ne5 Be5 28.gh3 Qg5 29.Kf2–+) 25.Qa2 Re7 26.Bb4 Ne8 27.Qa3 Re5 28.a6 (28.Rac1 Na6 29.Bd6 Qd6 30.Qa2+=) 28...Na6 29.Ng6 hg6 (better is 29...Bb4 30.Bf7 Kf7 31.Ne5 Ke7 32.f6 Nf6 33.Nec6 bc6 34.Nc6 Ke8 35.Nb4 Bb7+=) 30.Bd6+= Rf5 31.Nf5 gf5 32.Be5 Be6 33.Ba6 ba6 34.Qe7 Bc4 35.Rf5 Qe6 36.Qe6 Be6 37.Rf4 f6 38.Bc3 Bd5 39.g4 Nc7 40.h4 Ne6 41.Rff1 Bc4 42.Rf2 c5 43.Kg2 Kh7 44.h5 Ng5 45.Rf5 Be6 46.Rf4 Bc4 47.Kg3 Re8 48.Rc1 Bd3 49.Rf5 Ne6 50.Rd5 Bc4 51.Rd6 Bd3 52.Bb2 Kh6 53.Ba3 The isolani on c5 becomes a target 53...Bb5 54.Bc5 Nc7 55.Rd4 Ne6? (better is 55...Bd3+/–) 56.Re4+– Bd3 57.Ra4 Bb5 58.Rb4 Rc8 59.d4 g6 60.Kh4 1–0. Wight,David (2185) – Hermans,Marcel (2005), IECC, 2007.

6.Be2 g6 7.0-0 Bg7 8.d4 0-0 9.Nbd2 d5 10.c4 Nbd7 11.Qc2 Re8 12.Bb2 Nb6 13.Rfb1 Na4 14.Bd1 Bf5 15.Qa4 Qa4 16.Ba4 Ra4 17.Rc1 Ne4 18.Ne4 Be4 19.Nd2 Bd3 20.cd5 cd5 21.Nb3 b6 22.Rc6 Rb8 23.Rac1 Raa8 24.h4 e6 25.Nd2 Bf8 26.R1c3 Bb5 27.Rc7 Bd6 28.Nf3 Bc7 29.Rc7 Rc8 Time forfeit 0-1. cipiripi (2185) - Mikanovic (2235), Rated Blitz game, lichess.org, 2015.

6.Be2 g6 7.0-0 Bg7 8.d4 0-0 9.Nbd2 d6 10.c4 Qc7 11.Bb2 Nbd7 12.Qc2 b6 13.h3 Bb7 14.Rac1 Ra5 15.e4 e5 (15...Rfa8 16.Rb1=) 16.de5 (better 16.c5!? dc5 17.de5+/-) 16...de5 17.Nb3 Raa8 18.c5 b5 19.Rfd1 Rfe8 20.Rd6 Nf8 (20...Ra4 21.Rcd1=) 21.Rcd1 Nh5 22.g3 (22.Nc1 Nf4+=) 22...Bc8= 23.Kh2 Be6 (23...Nd7!?=) 24.Nc1 Ra4 (24...Nd7 25.Nd3 Bf8 26.Nde5 Bd6 27.Rd6+/-) 25.Nd3 (better 25.Ne5 Be5 26.Be5+-) 25...Re4 26.Nb4 (worse 26.Be5 Bc4 27.g4 Be5 28.Nfe5 R8e5 29.Ne5 Re2-/+; worse 26.Nde5 Bf5 27.Bd3 R4e5 28.Ne5 Be5 (worse 28...Re5 29.Be5 Bd3 30.Qc3+=) 29.Bf5 Bb2 30.Bg6 fg6 31.Qb2 Re6=+) 26...Rb4 (better 26...Bf5!? 27.Rc6 Qb7=) 27.ab4+/- Bf5 28.Qb3 e4 (28...Be4 29.Qe3 f5 30.Ne5 Be5 31.Be5 Re5 32.Bh5 gh5 33.f3+-) 29.Nd4+- Bd7 30.Bh5 gh5 31.Re1 (31.Qe3 h4 32.Qg5+-) 31...Ne6? (31...Ng6 32.Qd1 Qc8 33.Re2+/-) 32.Nf5 (32.Re4!? Qc8+-) 32...Be5?? (better 32...Nc5 33.bc5 Bf5 34.Bg7 Kg7 35.Qb2 Kg8+-) 33.Be5 1-0. cipiripi (2300) - pacal56 (2260), Rated Blitz game, lichess.org, 2015.

5.Nc3 e5 6.Rb1 (6.Nf3 Nf6=) 6...Qc7=+ 7.Bc4 (7.Rb3 d5=) 7...d5 8.Be2 Bd6 (8...b5 9.Rb3–/+) 9.a4 f5 (9...Nf6 10.Nf3–/+) 10.Bh5=+ g6 11.Be2 d4 12.ed4 ed4 13.Bb2 (13.Na2 Ra4 14.Ra1 Qa5–+) 13...dc3=+ 14.Bc3 Be5 15.Ba5 Qa5 16.Rb3 (16.Nf3 Bd6=+) 16...Ne7 17.Nf3 Bf6 18.Re3 0-0 19.0-0 (19.Bc4 Nd5–/+) 19...Nd5 20.Bc4 Kh8 (20...Qa4!? 21.Bd5 cd5–/+) 21.Bd5= cd5 22.Rfe1 (22.c3 f4 23.Re2 Bg4–/+) 22...Bd7 (22...Qa4 23.d4–/+) 23.Ne5=+ Qc7 (23...Qa4 24.d4 f4=+) 24.Qa1 (24.c3 f4 25.R3e2 Nc6 26.Nd7 Qd7=) 24...Nc6 (24...Qc2 25.Qd4–/+) 25.Nd7? (25.Qc3 f4 (25...Be5?! 26.Re5 d4 27.Qc5=) 26.Qc5 Rc8 27.Nd7 Qd7–/+) 25...Qd7 (25...Ba1 26.Nf8 Be5–/+) 26.Qa3 Bg7 27.Re6 f4 (27...Nd4 28.Re7 Qc6 29.c3–+) 28.Rd6 (28.Qf3 Nd4 29.Qg4 Ne6 30.Qe6 Qa4 31.Qd5 Qc2–+) 28...Re8 (28...Qf5 29.Qc5 Bd4 30.Qd5 Qc2 31.Qf3–/+) 29.Re8 (29.Re2 Re2 30.h3–+ (30.Rd7?? Re1)) 29...Qe8–/+ 30.Qc1 Qe2 (30...Nd4 31.Qb1–/+) 31.Rd5=+ Bd4 32.c3?? (better is 32.Qf1!? Qd2 33.c4=+) 32...Qf2 (32...Bf2 33.Kh1 Be1 34.Rd8 Nd8 35.h4 Qf1 36.Kh2 Bg3 37.Kh3 Qc1 38.Kg4 Qd1 39.Kh3 g5 40.hg5 Qh5#) 33.Kh1 f3 34.Rg5 Qh4 35.d3 f2 (35...Be5 36.h3–+) 36.Rg3 (better is 36.Rb5 Be5 37.h3–/+) 36...Bc3 37.Qc3 Qd4 38.Qd4?? (better is 38.Qc1+/–) 38...Nd4–+ 39.Rf3 Nf3 40.gf3 (40.a5 f1Q#) 40...f1Q# 0–1. Langguth,Wilhelm – Laser,Dirk, corr ICCF–Cup8/9 V184, 1990.

5.Nc3 e6 6.Nf3 d5 7.Be2 Nf6 8.0-0 Nbd7 9.Rb1 (9.d4 Qc7=) 9...Qc7=+ 10.h3 (10.Ra1 e5=+) 10...Ba3-/+ 11.Ba3 Ra3 12.Nd4 0-0 13.Qc1 Ra8 14.f4 e5 15.fe5 Ne5 16.Nf5 (16.Qe1 Qe7-/+) 16...Bf5 17.Rf5 Ng6 18.Bd3 Rfe8 19.Qf1 b5 20.Ne2 Ne4 (20...Ne5 21.Nd4-+) 21.Rd1 (21.Be4 de4 22.Nd4 Qd7-/+) 21...Re5 (21...Nc5 22.Ra1-+) 22.Be4 de4 23.Nd4 Rd8 (23...Qd7 24.Re5 Ne5 25.Ra1 Ra1 26.Qa1-/+) 24.c3? (better 24.Re5!? Ne5 25.Qf5=) 24...Qd7-/+ 25.Re5 Ne5 26.Qf4 Nd3?? (better 26...Qd5-/+) 27.Qe4+= Nc5 (27...Nb2 28.Rb1 f5+=) 28.Qc2 (better 28.Qc6 Qc6 29.Nc6+/-) 28...Ne6 29.Rf1 Nd4 30.cd4 Qd5 (30...Rb8 31.Ra1=) 31.Rc1 Rd6 32.Qc5 (32.Ra1 Rd8=) 32...Qc5 33.Rc5 Kf8 34.Kf2 Ke7 35.Ke2 Kd7 36.Kd3 (36.d3 Rd5=) 36...Rg6 (36...Rd5 37.Rc1=+) 37.g4 Kd6 38.h4?? White prepares g5 (38.Rh5 Rh6 39.Rh6 gh6=) 38...h6 (better 38...Rg4 39.Rh5 h6-+) 39.g5= hg5 40.hg5 f6 41.gf6 gf6 42.Rc1 f5 43.Rf1 Rf6 (43...Ke6 44.Rc1 Kd7 45.Rc5=) 44.Rf4 (44.Kc3 Rf7=) 44...Ke6 45.Kc3 Rg6 46.Kd3 Rg4 47.Rf3 Rh4 48.Rg3 f4 (48...Rh8 49.Rg6 Kd5 50.Rf6=) 49.Rg6 Kd7 50.ef4 (better 50.Rf6!?=) 50...Rf4=+ 51.Rg5 Rf6 (51...Rf3 52.Ke4 Rf7 53.d5=+) 52.Rc5 (52.d5 c5 53.Rg7 Kd6=+) 52...Rd6 (52...Kd6 53.Rg5-/+) 53.Kc3 (53.Ke4 Re6 54.Kf5 Rh6=+) 53...Ke6 (53...Kc7 54.Rh5-/+) 54.d3 (54.d5!? cd5 55.Rb5 Rc6 56.Kd3=) 54...Kd7=+ 55.Re5 Kc7 56.Rc5 (56.Rg5 Rd5 57.Rg7 Rd7=+) 56...Kb6 (better 56...Rd5!? 57.Kd2 Kb6-+) 57.Rg5=+ Rh6 58.Rg6?? (better 58.Rf5=+) 58...Rh4 (better 58...Rg6 59.Kb3 Rg4-+) 59.Rg5 (59.d5!?=) 59...Rh1 60.Rg4 (60.Kc2 Rh6=+) 60...Rc1 61.Kd2 Ra1 62.Kc3 Ra3 63.Kc2 b4 (63...Kc7 64.Rg7 Kd6 65.Rg8-/+) 64.Rg5 Rc3 65.Kd2 Ra3 66.Kc2 Rc3 67.Kd2 Ra3 (67...Ka6!?=+) 68.Kc2= Rc3 ½-½. onxisback (2085) - sezwho (2005), Rated Bullet game, lichess.org, 2013.

5.c4 c5 6.d4 cd4 7.Qd4 Rc5 8.Nc3 Qa5 9.Bd2 Nc6 10.Ne4 (10.Qf4 g5 11.Qg4 Bg7=) 10...Nd4+= 11.Ba5 Nc2 12.Kd2 Na1 13.Nc5 d6 (better is 13...e6=) 14.Nd3?? (better is 14.Bc3 dc5 15.Ba1+=) 14...Nb3–+ 15.Kc3 Na5 16.Nf3 e5 17.Nb4 Be7 18.Nd5 Bd8 19.Bd3 f5 20.Nh4 (20.e4–+) 20...Bh4 21.e4 (21.g3 Bd8–+) 21...Bf2 (21...fe4!? 22.Be4 Bf2 23.Rb1–+) 22.ef5 Bd4 23.Kb4 Nc6 24.Kb3 Nf6 25.h3 (25.Nf6 gf6 26.Be4 Bc5–+) 25...0-0 26.g4 Bd7 (26...Nd5 27.cd5 Ne7 28.Rc1–+) 27.Rh2 (27.Nf6 Rf6 28.Be4 g6 29.fg6 hg6–+) 27...Nd5 28.cd5 Na5 29.Kb4 (29.Ka2 g6! 30.Rg2 Ba4–+) 29...b6 (29...Rc8 30.Rc2 Bc5 31.Kc3–+) 30.Bb5 Bc5 31.Ka4 Bb5 32.Kb5 e4 33.Rc2 (33.Ra2 Nb3 34.Kc4 Nd4–+) 33...e3 34.h4 (34.Re2 g6 35.h4 gf5 36.gf5 Rf5 37.Rg2 Kf7–+) 34...Re8 35.Re2 Re4 36.Rg2 e2 (36...e2 37.Re2 Re2–+) 0–1. jeffdre – rex147, gameknot.com, 2013.

5.c4 e5 6.d4 ed4 7.ed4 Bb4 8.Ke2 d6 =+.

5.c4 e5 6.Nf3 e4=+ 7.Nd4 Nf6 8.Nc3 Re5 (8...Bc5 9.Na4 Qa7 10.Nc5 Qc5 11.Nb3+/–) 9.f4 (9.Rb1 Qa5=) 9...ef3 10.Nf3 Rh5 (10...Ra5 11.Rb1 Qa7 12.a4=) 11.Qc2 (11.Rb1 Qa5=) 11...Be7 12.Ne4 (12.Bb2 Qc5=) 12...Ne4 (12...d6 13.Rb1 Qc7 14.Bb2 Ne4 15.Qe4–+) 13.Qe4 (13.Rb1 Bh4 14.Nh4 Qb1 15.Qb1 Rh4+–) 13...d5 14.Qf4 (better is 14.Qd4 Qd4 15.Nd4 Bh4 16.Kd1 Bg4 17.Kc2 dc4 18.Bc4=) 14...0-0?? (better is 14...Nd7=+) 15.Qb8+– c5 (15...dc4 16.Bc4 Qc5+–) 16.g4 (better is 16.cd5!? Bd6 17.Qa8 Be6+–) 16...Qf6 (16...Bd6 17.Qd6 Qd6 18.gh5–+) 17.gh5+– Qa1 18.Kf2?? (better is 18.Kd1+–) 18...Qc1–/+ 19.Rg1 (19.h6 g6–/+) 19...d4 (19...dc4 20.Qe5 Bh4 21.Ke2 g6 22.Nh4 Qa3+–) 20.Qe5 de3? (20...Bh4 21.Nh4 Qd2 22.Be2 f6+/–) 21.de3+– (21…Qc2 22.Be2 Bh4 23.Nh4+–) 1–0. Damaso,Rui (2485) – Silva,Fernando (2335), POR–ch Maceira, 1997.

5.c4 e5 6.Nf3 Nf6 7.Nc3 Be7 8.Be2 h6 9.d4 e4 10.Ne5 0-0 (better is 10...Qc7!?=) 11.c5+/– Qc7 12.Bd2 (12.Nc4!? Ra8 13.Qc2+/–) 12...Ra7 13.Qc2 Bc5 14.Ne4 (worse is 14.dc5 Qe5 15.Ra2 Rd8–/+) 14...Ne4 15.Qe4 d5 16.Qd3 Bd6 17.Nf3 b6 18.h4 Ba6 19.Qb3 Be2 20.Ke2 Nd7 21.Qd3 Rfa8 22.Bc1 Nf6 23.Bb2 Qe7 24.Rhc1 Ba3 25.Ba3 Ra3 26.Ra3 Ra3 27.Qf5 Ra2 28.Ke1?? (better is 28.Rc2 Qe6 29.Qd3–/+) 28...Qb4–+ 29.Kf1 Qb5 (better is 29...Qb2 30.Rc2 Qc2 31.Qc2 Rc2–+) 30.Kg1+= Qe2 31.Ne5 c5 32.dc5 Qd2 33.Rf1 bc5= 34.Qc8 Kh7 35.Nf7 Qc2 36.Qh8 Kg6 37.Ne5 Kf5 38.Nf3 Nh5?? 39.Qe8 Ng3?? 40.Qe5 Kg6 1–0. combijack (1735) – chesssebas (1715), gameknot.com, 2010.

5.Nf3 d5 6.Nc3 A) 6...Nd7 7.Be2 Qc7 (7...Ngf6 8.0-0 Ne4 9.Ra2 Nc3 10.dc3) 8.Nd4 e5 9.Nb3 Ra8 10.0-0; B) 6...Na6 7.Rb1 (7.d4 Nf6 8.Be2 g6 9.0-0 Bh6 10.Rb1) 7...Qc7 8.d4 Nf6 9.Bd3 g6 10.Nd2; C) 6...Nf6 7.d4 Nbd7 (7...e6 8.Rb1 Qc7 9.Bd3 Nbd7 10.0-0) 8.Bd3 e6 9.0-0 Be7 10.Rb1.

5.Nf3 d5 6.c4 Bg4 (6...Nf6!?= 7.Nc3 Nbd7 (7...Ne4 8.Bd3 Nc3 9.dc3 Nd7 10.Rb1) 8.Rb1 Qd8 9.cd5 Nd5 10.Nd5) 7.Nc3+– e5 (7...Nf6 8.Rb1 Qc7 9.Qb3 Nbd7 10.Qb7) 8.Rb1 Qc7 9.cd5 (better 9.Qb3+– Nf6 10.Qb7) 9...Ba3? (better 9...Nf6 10.Qb3 cd5 11.Qb7 Qb7 12.Rb7 Nbd7+–) 10.Ba3+– Ra3 11.dc6 (11.Qc1 Ra5 12.Nb5 Rb5 13.Rb5 Bf3 14.gf3 Nf6+–) 11...Nc6? (better 11...bc6 12.Ne4 Nf6+–) 12.Nb5 Qa5 (12...Qe7 13.Na3 Qa3 14.Ra1+–) 13.Nd6 Kd7 (13...Kf8 14.Nc4 Qa7 15.Na3 Qa3 16.Rb7 e4+–) 14.Nc4 (14.Nf7 Kc7 15.Nh8 e4+–) 14...Qc5 15.Na3 (15.Rb7 Kc8 16.Rb5 Qa7 17.Na3 Qa3+–) 15...Qa3 16.Rb7 Kc8 (16...Kd6 17.Be2 Nf6 18.0-0 Bf3 19.Bf3+–) 17.Rb3 (17.Rf7 g6+–) 17...Qa2 (17...Qa8 18.Be2 e4 19.Qc1+–) 18.Rc3 (18.Bc4!? Qa8+–) 18...Nge7 19.Be2 1–0. Nikolaev,Dmitriy – Poluhovich,Igor, Chervonny, 2007.

5.Nf3 d5 6.Be2 Na6 A) 7.Nc3 Nf6 8.0-0 Nc5 9.Ne5 Bf5 10.d4; B) 7.Ne5 f6 (7...Nf6 8.Nc3 Nc5 9.0-0 Bf5 10.d4; 7...Nc5 8.Nc3 Nf6 9.0-0 Bf5 10.d4) 8.Nd3 Nh6 9.Nc3 Nf5 10.0-0; C) 7.d4 Nf6 8.Bd2 e6 9.Ba5 Qa5 10.Nbd2.

5.Nf3 e5 6.d3 Bb4 (6...d6 7.Bd2 Ra4 8.Nc3=) 7.c3 Be7 8.Nbd2 Qc7 9.Nc4 Rc5 10.Be2 (10.d4 ed4 11.cd4 Rh5+=) 10...f6 (better is 10...b5!? 11.Ncd2 Nf6=) 11.d4+/– ed4 12.ed4 Rh5 13.0-0 d5 14.Ne3 Nh6 15.c4 Ng4 Can h2 get defended? (15...Bd6 16.Ne5 Rh4 17.g3 Rd4 18.Qd4 Be5 19.Nd5 cd5 20.Qe3–+) 16.Ng4 (16.Ne5 fe5 17.Bg4 Bg4 18.Ng4 Rf5 19.Ne5 dc4 20.Nc4 0-0+/–) 16...Bg4+= 17.h3 Be6 18.c5 g5 (18...0-0!?+=) 19.Re1+/– Rh6 (19...0-0 20.Bd3 Qd7 21.Qe2+–) 20.Rb1 Rg6 (20...0-0 21.Bd3 Bc8 22.Rb2+–) 21.Bd3 f5 22.Ng5! Bc8 (22...Rg5 23.Bg5) 23.Qf3 0-0 (23...Qa5 24.Bf4 Rhg8 25.Bd6+– (25.Bb8?! Rg5 26.g3 Kd8+–)) 24.Bf4 Qd8 25.Nh7 (25.Bb8?! Bg5 26.Be5 Bd2+–) 25...Kh7 26.Bb8 Rfg8 (26...Qd7 27.Be5+–) 27.Bf5 Bf5 28.Qf5 Bc5 (28...Qf8 29.Qf8 Rg2 30.Kf1 Rg1 31.Ke2 Re1 (31...Bf8?? 32.Rg1 Rg1 33.Rg1+–) 32.Ke1 Bf8 33.Rb7 Kg6+–) 29.Rb7 R8g7 30.Rg7 (30.dc5?! Rb7 31.Re6 Qg5 32.Qg5 Rb1 33.Kh2 Rg5+–) 30...Kg7 31.Be5 Kh7 (31...Kh6 32.Qf4 Qg5 33.Qg5 Rg5 34.dc5 Rg8+–) 32.Qh5 (32...Kg8 33.Qg6 Kf8 34.Qg7 Ke8 35.Bd6 Qe7 36.Qe7#) 1–0. West,Guy (2310) – Gibbons,Robert (2205), Sydney, 1989.

5.Nf3 e6 6.Nc3 (6.d4 Nf6+=) 6...Nf6 7.Rb1 Qc7 8.a4 d5 9.Be2 Bd6 10.h3 Nbd7 11.0-0 0-0 12.Nd4 g6 (12...Nb6 13.Nb3 Ra8 14.Ra1+=) 13.f4 e5 (13...Nc5 14.Nb3 Nb3 15.Rb3=) 14.Nb3 Ra8 15.d3 b6 16.e4? (16.fe5!? Be5 17.Bb2+=) 16...ef4 (better is 16...d4 17.fe5 Be5–+) 17.ed5–/+ cd5 (17...Nd5 18.Nd5 cd5 19.Nd4–/+) 18.Bd2 (18.Nb5 Qc6+=) 18...Nc5 The isolani on a4 becomes a target (18...Ba6 19.Bf3 Qc6 20.Ne2+=) 19.Bf3 Attacking the isolated pawn on d5 (19.Nb5!? Qd7 20.Nd6 (worse is 20.Bf4 Bf4 21.Rf4 Na4=) 20...Qd6 21.Bf4+=) 19...Bb7 (19...Nb3 20.cb3 Be5=) 20.Nb5= Qd7 21.Nd6 Qd6 22.Nc5 Qc5 23.Kh1 Qc7 (23...Ra4 24.c4 Rfa8 25.Bf4=) 24.c4 dc4 (24...Rfc8 25.Rb5 Bc6 26.Rb4=) 25.Bb7 (25.Bf4!? Qc8 26.Rb6+/–) 25...Qb7= 26.Rf4 Kg7?? (better is 26...Nd7 27.Rc4 Rfc8+=) 27.Bc3+– (27.Rc4?! Rfe8+=; 27.dc4?! Nh5 28.Rg4 Qc7+=) 27...Qc6 (27...Kg8 28.Bf6 cd3 29.Qd3+–) 28.Rc4 (better is 28.Rf6 Qf6 29.Bf6 Kf6 30.Rb6 Kg7 31.dc4 Ra5+–) 28...Qe6 29.Qf3 Rac8 30.Rf1 Rc4 31.dc4 Kg8 (31...Rc8 32.Qf6 Qf6 33.Rf6+–) 32.Qf6 (worse is 32.Bf6 Qc4 33.Bb2 Qe6+–) 32...Qf6 33.Rf6 Rc8 34.Rb6 Kf8 (34...f5 35.Rb4+–) 35.Bb4 (35.Bf6!? h6+–) 35...Ke8 36.c5 h5 37.c6 Kd8 38.Bd6 Ra8 (38...f5+–) 39.Rb8 Rb8 40.Bb8 Kc8 41.Bd6 f5 42.a5 g5 43.a6 1–0. mikebaldini – alanbstard, gameknot.com, 2013.

5.Nf3 Nf6 6.c4 d5 7.Qc2 g6 8.cd5 Bf5 9.d3 Bg7 10.Nbd2 Rc5 11.Nc4 Qc7 12.d6 ed6 13.Qa2 Be6 14.Nd4 Bc4 15.dc4 Ne4 16.Qb3 0-0 17.f3 Ng5 18.Rb1 Re8 19.Kf2 Qa5 20.Bd3 d5 21.Qb7 dc4 22.Be2 Qc3 23.Rd1 Bd4 24.Rd4 Ne6 25.Re4 Qc2 26.Qb2 Qb2 27.Rb2 Nd7 28.Rc4 Ne5 29.Rc5 Nc5 30.Rc2 ½–½. Plasman,Hans (2160) – Paalman,HJ, SBO–ch Deventer, 1998.

5.Bb2 A) 5...b4 6.Bd4 Qc7 7.ab4 e5 8.Bc3=; B) 5...Nh6 6.Bd4 (6.Nf3 Nc6 7.Nc3 b4 8.ab4=) 6...Qg6 7.Nc3 Nf5 8.Be5=; C) 5...Nc6 6.Nf3 (6.Nc3 b4 7.ab4 Nb4 8.Nf3=) 6...b4 7.ab4 Nb4 8.Na3=.

5.Nc3 Na6 6.Bb5 Nc7 7.Bd3 d5 (7...Nf6 8.Nf3+=) 8.Nf3 Bg4 (8...Nf6 9.Rb1 Qc6 10.Ne5+=) 9.Rb1 Qc6 10.h3 Bf3 11.Qf3 e6 (11...e5 12.e4 d4 13.Nd5+–) 12.Nb5+– Ne7 (better 12...Qc5!?+–) 13.Qf4+– Na6?? (13...Kd7 14.Nc7 Qc7 15.Qf7 e5+–) 14.Nd6 (14.Nd6 Qd6 15.Qd6+–) 1–0. pierred – klescev, net–chess.com, 2017.

5.Nc3 d6 6.Bb5+/– Bd7 7.Rb1 Bb5 8.Rb5 Qc6 9.Qf3 Qf3 (9...Ra7!?+/–) 10.Nf3+– (worse is 10.gf3 Ra7+/–) 10...Ra7 11.e4 e6 (11...g6 12.d3 Bh6 13.Ke2+–) 12.d3 Nd7 13.Be3 Nc5 (13...b6 14.Bb6 Nb6 15.Rb6+–) 14.e5 d5?? (14...Ra8+–) 15.Bc5 Bc5 16.Rc5 Ne7 17.Rc7 Ra8 18.Rb7 Rc8 (18...Nf5 19.Kd2+–) 19.Nb5 Kf8 (19...0-0 20.Re7 Rc2 21.0-0+–) 20.Nd6 Rc2 (20...Ra8 21.Ke2+–) 21.Rb8 (21.Kd1!? Rc8 22.Nc8 Nc8+–) 21...Nc8 22.Nc8 g6 23.Nd6 Kg7 24.Rh8 Rc1 (24...Kh8 25.0-0 Kg7+–) 25.Ke2 Rh1 26.Ra8 Rb1 27.Ra7 Rb2 28.Ke3 h6 29.Nf7 (29.Nd4 Kg8 30.Rf7 h5 31.Ne6 d4 32.Ke4 Rb7 33.Rb7 a4 34.Rg7 Kh8 35.Nf7) 29...Kg8 30.Nh6 Kf8 31.Nd4 Rb6 32.Nf7 a4 33.Ng5 Rb8 (33...Ra6 34.Ra6 Ke7 35.Ra7 Ke8 36.Nge6 g5 37.Nc6 d4 38.Ke4 g4 39.Re7) 34.Nh7 Kg8 (34...Ke8 35.Nf6 Kd8 36.Ne6 Kc8 37.Rc7) 35.Nf6 (35.Nf6 Kf8 36.Ne6) 1–0. mtrc – Daxx, internet, 2002.

5.Nc3 e6 6.Bb5 Nc6 7.Nf3 Nf6 8.Rb1 +=.

5.Nc3 e6 6.Bb5+= Nf6 7.Rb1 Qc7 8.Nf3 Be7 9.0-0 0-0 10.Bb2 (10.Be2 Nc6+=) 10...d5= 11.d3 Bd7 12.Qd2 (12.Bd7 Nbd7 13.Nb5 Qc6=) 12...Rc8 13.Bd7 Nbd7 14.Rfc1 (14.Nd4 e5 15.Ncb5 Qc5=) 14...e5 (14...Ba3 15.Nb5 Bb4 16.c3=) 15.Nb5 Qb8 16.d4 (16.Nh4 Rc5 17.Nf5 Qf8=) 16...Ne4 (16...e4!? 17.Ne5 Bd6=) 17.Qd3 ed4 18.Qd4 (18.Bd4 Ndc5 19.Qe2 Bf6+=). Kreuzer,Uwe – Kern,Michael, corr 3GMM–56, 1994.

5.Nc3 e6 6.Nb5 Nf6 (6...d5 7.Bb2 Nd7 8.Rb1+=) 7.Nf3 (7.Bb2 Be7+= 8.Rb1+=) 7...d5 (7...Be7 8.Rb1+=) 8.Bb2 a4 (8...Nbd7 9.Be2+=) 9.Be5+/– Na6 10.Rb1 Qd8 11.d4 (11.c3 Qa5+/–) 11...Qa5 (11...Ne4 12.Nd2+=) 12.Nd2 Bd7 13.Bd3 Bc6 (13...Ne4!?+=) 14.0-0+/– Be7 (14...Qd8 15.f3+/–) 15.c4 0-0 16.Qc2 (16.c5 Nd7 17.Bd6 Qd8+/–) 16...h6 (16...Rfc8 17.c5+/–) 17.c5 Rfc8 18.Bf6 (18.Rfc1 Nd7 19.Bd6 Bf6+/–) 18...Bf6 19.Nd6 Rcb8 20.f4 (better is 20.Rb6 Bd8 21.Rb2+=) 20...b5? (better is 20...Be7 21.Bh7 Kf8+=) 21.cb6+– Rb6 (21...Bd7 22.b7 Ra7 23.Nf3+–) 22.N6c4! dc4 23.Nc4 (23.Nc4 Rb1 24.Na5 Rf1 25.Kf1+–) 1–0. Vegjeleki,Adolf (2310) – Baeckstroem,Mikael (2295), corr ICCF WSTT/3/06/1, 2006.

5.Nc3 g6 6.Bb2 Bg7?? (better is 6...Nf6+/–) 7.Nd5+– (7.Bb5?! Nf6+=) 7...Qd6 8.Bg7 Qd5 9.Qb1 f6 (9...b6 10.Bh8 Ba6 11.Ne2+–) 10.Qb5 Qb5 11.Bb5 Kf7 (11...Nh6 12.Bh8 Kf8 13.c4+–) 12.Bh8 Nh6 (12...d5 13.c4+–) 13.Ne2 (better is 13.Bc4 e6 14.Rb1 d5+–) 13...Kg8 14.Bf6 ef6 15.Nc3 (15.Nf4 Kg7+–) 15...Nc6 (15...Nf5 16.Nd5 Nd6 17.Be2+– (17.Nf6?! Kf7+–)) 16.Rb1 Nf5 17.Nd5 Kf7 18.Nb6 (18.d4 Rb8+–) 18...Rb8 19.d4 d6 (19...Nfe7 20.d5 Na7 21.e4+–) 20.Bc4 (20...Kf8 21.Bd5+–) 1–0. pierre (2085) – thotares (1715), internet, 2007.

5.Nf3 A) 5...Nf6 6.Bb2 (6.Nc3 b4 7.ab4 Qb4 8.Nb5=; 6.Be2 Nc6 7.Nc3 b4 8.ab4=) 6...Nc6 7.Bf6 ef6 8.c3=; B) 5...b4 6.ab4 Qb4 7.Nc3 Qb6 8.e4=; C) 5...Nc6 6.d4 (6.Bb2 b4 7.ab4 Nb4 8.Na3=; 6.Nc3 b4 7.Nd5 Qd8 8.Bb5+=; 6.Be2 b4 7.0-0 e5 8.Bb2+=; 6.e4 Nf6 7.Nc3 b4 8.ab4+=) 6...Nf6 7.d5 Na7 8.Bb2=.

6.Rb1 Nf6 7.ab4 ab4 8.Nf3 +=.

6.ab4 e6 7.Ra5 Ra5 8.ba5 Qa5 9.Nf3 Nf6 10.Bb2 Ba3 (10...d5 11.Nb5+=) 11.Qa1+/– Bb4 12.Qa5 Ba5 13.Nb5 Nc6 14.Nd6 Ke7 15.Ng5 Rf8 16.Ngf7 Rf7 (16...Bc7!? 17.Nb5 Rf7 18.Nc7 d6+/–) 17.Nc8+– Kd8 18.Nd6 Rf8 19.Nb7 Kc7 20.Na5 Na5 21.Bc3 Nc6 22.f4 d5 23.Ba6 (better is 23.Bd3!?+–) 23...Ne4+/– 24.Bg7 Ra8 (24...Rg8 25.Be5 Ne5 26.fe5 Rg2+–) 25.Bf1 d4 (25...Nb4 26.Bd3 Ra2 27.Be5 Kd7+–) 26.ed4 Ra1 (26...Ra2 27.Ke2 Rc2 28.Kd3 Nf2 29.Kc2 Nh1 30.Be5 Kd8 31.Bb5 Nb4 32.Kc3 Nd5 33.Kc4+–) 27.Ke2 Ra2 28.Rg1 Nb4 29.Be5 Kc6 30.Ke3 Nd6 31.c3 Nf5 (31...Nd5 32.Kd3+–) 32.Ke4 Nd5 33.Bc4 Nb6 (33...Ra5 34.Bd5 Rd5+–) 34.Ba2 (34.Ba2 Nd6 35.Kd3+–) 1–0. marus2 – TT4, internet, 2001.

7.Ra4 Qb6 8.Ba3 d6 9.Nd5 Qd8 10.Qb1 =.

7.Ra4 Qb6 8.Ba3 Nf6 9.Bc5 Qd8 (9...Qc7 10.Qb1=) 10.Qb1 d5 (10...e5 11.Bb6 Qe7 12.Ba5+=) 11.Bb6 Qd7 (11...Qd6 12.Ba5 Na6 13.Nf3+=) 12.Nb5 Na6 13.Ra5 Qg4?? (better is 13...Rb8+/–) 14.Ra6!+– Ra6 (14...Ra6 15.Nc7; 14...ba6 15.Nc7) 15.Nc7 Kd7 (15...Kd8 16.Nd5 Ke8 17.Nc7 Kd8 18.Na6 Ke8 19.Nc7 Kd8+–) 16.Qb5 (16...Kd6 17.Qc5 Ke5 18.f4 Qf4 19.ef4 Kf5 20.Na6 ba6 21.Qc8 e6 22.Nf3+–; 16.Na6?! ba6 17.Nf3 Ke8+=) 1–0. Andersson,Lars H – Jansson,P, corr SSKK 2–99, 1987.

7.Ra4 Qb6 8.Nd5 Qd8 9.Ba3 (9.Bb2 e6 10.Nc3 d5=) 9...Nf6 (9...d6 10.Bb2=) 10.Nf6 gf6 11.Nf3 Nc6 (11...d5 12.Bb5 Bd7 13.Bd7 Nd7 14.Rg4=+) 12.d4 d5 13.Qb1 (13.c4 Be6=) 13...Bd7 14.Bb5 (14.Qb7 Rb8 15.Qa6 Rb1 16.Kd2 Rb6–/+) 14...b6 (14...Rg8 15.0-0=+) 15.0-0 Rc8 16.c4 (16.Qb3 Bg4=) 16...Na7=+ 17.Bd7 Qd7 18.Qb3 dc4 19.Rc4 Rc4 20.Qc4 b5 21.Qb3 a4 (21...Rg8 22.Rc1=+) 22.Qc3 e6 23.Rc1 (23.Ra1 Ba3 24.Ra3 0-0=+) 23...Ba3= 24.Qa3 Nc8 25.d5 (25.Rc5 Nd6=+) 25...ed5 (25...Ne7 26.d6 Nd5 27.Qc5=+) 26.Nd4 (26.Qc5 Nd6=+) 26...Ne7 (26...Na7 27.Rb1=+) 27.Rb1+= 0-0 28.Nb5 Rb8 (28...Ra8 29.Rb4+=) 29.Qa4 Nc8 (29...Ng6 30.Kh1+/–) 30.Rb4+/– Nd6 (better is 30...Qc6!? 31.Qa3 Nd6+/–) 31.Nc3+– Qc7 32.Rb8 Qb8 33.h4 (33.Qc6!?+–) 33...Qb7 (33...Ne4 34.Nd5 Qb1 35.Kh2 Kg7+–) 34.h5. Van Rooijen,Peter (1650) – Blackshaw,Graham, IECC, 2003.

7.Ra4 Qc5?? 8.Rc4+– (8.Rc4 Qc4 9.Bc4+–) 1–0. b4_player – jensen, internet, 2013.

7.Nb5 Qc5 8.Ba3 Qb6 9.Rb1 Qd8 10.Nf3 Nc6 (10...Nf6!?+=) 11.d4 d5 12.c4 e6 (12...Bf5!? 13.Rc1 Nf6+=) 13.Bf8= Kf8 14.Qa4 Nge7 15.c5 Nf5 16.Bd3 Bd7 17.Bf5 ef5 18.Nd6 Nb4 19.Qb3 b6 20.Ne5 Be6 21.0-0 g6 22.Nd3 Nd3 23.Qd3 bc5 24.dc5 Kg7 25.Qd4 Qf6 26.c6 (better is 26.Qa4!?+=) 26...Qd4+= 27.ed4 Rhd8 28.Nb5 Rdc8 29.Rfc1 Ra6 30.c7 Bd7 31.Rc5 Bb5 32.Rbb5 Ra7 33.Ra5 Ra5 34.Ra5 Rc7 35.Kf1 Rd7 36.Ke2 f4 37.Kf3 g5 38.h4 Kg6 39.hg5 Kg5 40.Ra8 Rb7 41.Ra5 Rb3 42.Ke2 f3 43.gf3 Kf4 44.Rd5 Rb2 45.Kf1 f5 46.Kg2 Rb7 47.Ra5 (47.Kh3 h6=) 47...Rd7 (47...Rg7 48.Kh3+=) 48.d5 (48.Ra4 Rg7 49.Kf1 Kf3+=) 48...Rg7 (48...Ke5 49.Kg3 Rd6 50.f4 Ke4 51.f3 Kd4 52.Ra7=) 49.Kf1 Kf3 50.d6 Ke4 51.Ke2 f4 52.f3 Kd4 53.Rf5 Rd7 54.Rf4 Ke5 55.Rh4 Kd6 56.f4 Ke6 57.Kf3 Kf5 58.Rh5 Kg6 59.Rg5 Kf6 60.Rh5 Kg6 61.Rg5 Kf6 62.Rh5 ½–½. Raeva,Elitsa (2215) – Videnova,Iva (2155), Open Women Bulgarian Ch, Vratsa BUL, 2007.

7.Nb5 Qc5 8.d4 =.

7.Nd5 Qd6 8.c4 (8.e4 Ra7=) 8...e6 9.Nc3 Qc7 10.Nf3 Nf6 11.Bb2 Qd8 12.Nb5 Be7 13.g4 (better 13.Bf6!? gf6 14.Be2=) 13...0-0–/+ 14.g5 Ne8 (14...Ne4 15.Bd3 d5 16.Qb1–/+) 15.h4 Nd6 (15...d5 16.cd5 Qd5 17.h5–/+) 16.Bd3 (better 16.Nd6!? Bd6 17.Bd3=) 16...Nb5–/+ 17.cb5 f5 18.gf6 Bf6 19.Ne5 (19.Bh7 Kh8 20.Bg6 Bb2 21.Ne5+–) 19...d6–+ (19...Bh4 20.Bh7 Kh7 21.Qh5 Kg8 22.Rh4 (22.Qh4?! Qh4 23.Rh4 d5+–) 22...Qh4 23.Qh4+–) 20.Qh5 g6 (20...h6 21.Ng4 Qc7 22.Nh6 gh6 23.Bf6+–) 21.Ng6 (21.Rg1 Bg7 22.Ng6+–) 21...Bb2?? (better 21...Rf7 22.Rg1 Rg7 (22...hg6?? 23.Qg6 Rg7 24.Qh7 Kf8 25.Rg7 Bg7 26.Qg7 Ke8 27.Bg6) 23.Ne7 Qe7 24.Qh7 Kf7 25.Rg7 Bg7 26.Qg7 Ke8 27.Qh8 Kd7+–) 22.Nf8 (22.Rg1 Bg7 23.Ne7 Qe7 24.Bh7 Kh8 25.Bg6 Bh6 26.Qh6 Kg8 27.Be4 Qg5 28.Qh7) 22...Qe7?? (better 22...Kf8 23.Ra4 Be5+=) 23.Nh7+– Ba1 (23...Bg7+–) 24.Rg1 Bg7 25.Ng5 (25.Rg7 Kg7 26.Qg6 Kh8 27.Nf6 Qf7 28.Qh6 Qh7 29.Qh7) 25...Qf6?? (25...Kf8 26.Rg3 Nd7 27.Rf3 Nf6 28.Nh7 Kg8 29.Nf6 Bf6 30.Qg6 Kh8 31.Rg3 Bg5 32.Rg5 Bd7 33.Qh5 Qh7 34.Qh7) 26.Qe8 Qf8 27.Bh7 Kh8 28.Qh5 Bh6 (28...Qf2 29.Kf2 Bh6 30.Nf7 Kh7 31.Qh6) 29.Nf7 Kh7 (29...Qf7 30.Qf7 Be3 31.Rg8) 30.Qg6 1–0. FeegLood (2830) – singapu85 (2650), lichess.org, 2017.

8.Rb1 Qe6 9.Nf3 (9.Rb5 Nf6=) 9...d6 (9...d5!?=) 10.Nd4+= Qg6 (better is 10...Qd7+=) 11.Bd3 (better is 11.Nd5 Kd8 12.Nb6+/–) 11...Qg2=+ 12.Be4 Exerts pressure on the backward pawn 12...Qh3 13.Qe2 Nf6 14.Bf3 (14.Bb7 Bb7 15.Qb5 Qd7 16.Qb7 Qb7 17.Rb7 g6=+) 14...g6 (14...e5 15.Ndb5 Qd7 16.Qc4–/+) 15.Na4 (15.Bb7 Bb7 16.Rb7 Bg7–/+) 15...Nfd7 (better is 15...Nbd7!?–+) 16.Qb5 Increases the pressure on the backward pawn 16...Bg7?? (16...Ra7 17.Nb6 Nc6 18.Nd7 Kd7+/– (18...Bd7 19.Bc6 e5 20.Qb6 Bc6 21.Nc6+–; < 18...Qd7 19.Nc6 Ra6 20.Qb2+–)) 17.Bb7+/– Bb7 (17...Bd4 18.Ba8 Be5 19.Bb2+–) 18.Qb7 0-0 19.Qa8 Bd4 20.ed4 (20.Rb5 Rc8+/–) 20...Qa3 21.Nc3 e5 22.0-0 ed4+= 23.Rb3 Qc5=+ 24.Ne4 Qc2 25.Rfb1 Nc6–/+ 26.Qb7 ½–½. Bennett,Hilton Petrie – Gibbons,Robert, Auckland op, 1996.

8.d4 Nf6 9.Bb5 g6 10.Bc5 Qe6 11.Nge2 Nc6 (better is 11...Qg4 12.0-0 Nc6+=) 12.Nf4+– Qg4 13.Qg4 Ng4 14.Nfd5 d6? (better is 14...b6 15.Nc7 Kd8 16.Na8 bc5 17.Bc6 dc6+–) 15.Nc7 Kd8 (15...Kd7 16.Na8 dc5+–) 16.Bb6 (16.Na8?! dc5 17.Bc6 bc6+–) 16...Bd7 (16...Ra7 17.Na8 Ke8 18.Ba7+–) 17.Na8 Kc8 18.Ba5 1–0. mtrc – Slasker9, internet, 2002.

8.Nd5 Qd6?? 9.Bd6 Nf6 10.Nc7 Kd8 11.Na8 Ne4 12.Bb8 Nf2 13.Qh5 (13.Qh5 b5 14.Qf7 Ba6 15.Nc7 Kc8 16.Qe8 Kb7 17.Qd7 Kb8 18.Na6 Ka8 19.Qc8 Ka7 20.Qb8 Ka6 21.Bb5) 1–0. Pierre – Vyckrot, internet, 2020.

8.Nd5 Qd8 9.Bc4 e6= 10.Bf8 Kf8 11.Nc3 d5 12.Be2 (12.Bd3 Nf6=) 12...Nf6=+ 13.Nf3 Nc6 14.d4 Nb4 (14...g6 15.0-0=+) 15.Na2 (15.Na4 g6=+) 15...Na2 16.Ra2 Ne4 17.Qd3 b6 18.Nd2 Ba6 19.Qa3 Qd6 20.Ne4 Qa3 21.Ra3 de4 22.Ba6 Ra6 23.c4 Ke7 24.Kd2 Rc8 25.Rc1 Ra7 26.Rac3 (26.f3 Rac7 27.Ra4 ef3 28.gf3 g5=+) 26...Kd7 27.Kc2 (27.Rb1 Rc6–/+) 27...Rac7 (27...b5 28.Kb3 (28.cb5?? Rc3 29.Kc3 Rc7 30.Kd2 Rc1 31.Kc1 Kc7–+) 28...Rc4 29.Rc4 bc4 30.Rc4 Rb7 31.Ka3–/+) 28.Kb3 Kd6 (28...e5 29.Ka4=+) 29.Ka4=+ Kc6 30.Rb1 Rb8 (30...Kd7 31.Kb5=+) 31.Rb5= White plans c5 31...Kd7 32.Rc1 (32.c5 Rc6=) 32...Rc6 (32...Rcc8 33.g4=) 33.c5 Rbc8 34.Rc3 (34.Rd1 Kc7=) 34...f5 (34...e5 35.Rc4=+) 35.Kb3 (35.Rc2 g5=) 35...g5 36.Kc4 (36.Rb6?? Rb6 37.cb6 Rc3 38.Kc3 Kc6–+) 36...h5 37.Rcb3 Rb8 (37...a4!? 38.Ra3 bc5 39.dc5 Ra6=) 38.Ra5+= ba5?? (better 38...Rbc8 39.Ra7 Kd8+=) 39.Rb8+– Ra6?? (39...a4 40.Rb7 Kc8+–) 40.Kb5 Ra7 (40...Kc7 41.Re8 Rc6 42.Ka5 Kd7+–) 41.Kb6 Rc7 42.Rb7 Rb7 43.Kb7 a4 44.c6 (44.c6 Ke7 45.c7+–) 1–0. Tingstrom,Karl – Wiklund,Johan (1830), Svenska Cup, 2017.

8.Nd5 Qd8?? 9.Bc5+– d6 10.Bb6 Qd7 11.Nc7 (11.Nc7 Qc7 12.Bc7+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

8.Nd5 Qd8?? 9.Bc5+– e6 10.Bb6 (10.Bb6 ed5 11.Bd8 Kd8 12.c4+–) 1–0. Pierre – Prophan, internet, 2019.

8.Nd5 Qd8?? 9.Bc5+– Nf6 10.Bb6 Nd5 11.Bd8 Kd8 12.Qh5+–.

9.c4 b5 10.Qb3 Bb7 11.Qb5 +=.

9.c4 b5?! 10.Nf3 bc4 11.Bc4! Qc4 12.Rc1.

9.c4 b5 10.Nf3 bc4 11.e4 Ra7 –/+.

9.c4 b5 10.Nf3 e6 11.Ne5= Qb7 12.Qf3 (12.Nf7 ed5 13.Nh8 dc4 14.Qh5 g6 15.Qh7+–) 12...d6–/+ 13.Nb6 Ra7 14.Qf7 (< 14.Nc8 Qc8 15.Ng4 f5 16.cb5 fg4 17.Qg4 Nf6–+) 14...Qf7 15.Nf7 Rf7 16.Nc8 b4 17.Bb2 Kd8 18.Nb6 Rb7 19.Na4 Nd7 20.g3 Ngf6 21.Bh3 (21.Bg2 d5=+) 21...e5–/+ 22.Ke2 Be7 23.f4 Kc7 24.Rhc1 White prepares the advance c5 24...Re8 25.c5 dc5 (25...Nc5 26.fe5 Nfe4 27.Bg2+–) 26.fe5 Ng8 (26...Nd5 27.e6 N7f6 28.Nc5+/–) 27.e6 (27.Bd7 Kd7 28.Rc5 Ra8+=) 27...Ndf6+/– 28.Nc5 Bc5 (better is 28...Rb5!? 29.Nb3 Kb6+–) 29.Rc5+– Kd6 30.Raa5 Ke7 (30...Ne4 31.Rd5 Kc6 32.Rd7 Rd7 33.ed7+–) 31.Be5 (better is 31.d3+–) 31...Rd8?? (better is 31...b3 32.Bb2 Ne4+–) 32.Rcb5 (32.Bg2!? Rdb8 33.Bb8 Rb8+–) 32...Rb5 33.Rb5 (33...Ne4 34.Bd4+–) 1–0. Rudenko (Rudenkov?) – Strugatsch, corr Soviet Union, 1961.

9.c4 e6.

9.c4 Nf6 10.Nf6 Qf6 11.d4 Nc6 (11...d6 12.Bd3=) 12.Bd3 e5 13.Bf8 Kf8 14.Nf3 ed4 15.0-0 de3 16.fe3 Qe7 (16...d6 17.Be4 Qe7 18.Qb1=+) 17.Qe2 (17.Kf2!?=) 17...d6=+ 18.Rf2 (18.Qf2 Nb4 19.Qd2 Kg8=+) 18...Bg4 19.h3 (19.Qd2 Bf3 20.Rf3 Ne5–/+) 19...Bf3 20.Qf3 Ne5 21.Qd5 Nd3 22.Qd3 f6 (22...Kg8 23.Rfa2 b6 24.Rb1=) 23.Ra4 b6 24.Rb2 Qd7 (better is 24...Kf7!?=) 25.Rb6+/– Qa4?? (better is 25...Kf7 26.Qd5 Kg6+/–) 26.Qd6+– Kf7 (26...Kg8 27.Qd5 Kf8 28.Qa8 Qe8+–) 27.Rb7 Kg6 28.Qg3 Kh5 29.Qg4 Kh6 30.Qg7 Kh5 31.Kh2 f5 (31...Qc4 32.g4 Qg4 33.Qg4 Kh6 34.Rb5 a4 35.Rh5#) 32.g4 fg4 33.Qg4 Kh6 34.Rb6 Qc6 35.Rc6# 1–0. orane – shaunarose, Live Game Caissa's Web, 2004.

9.e4 Na6 =.

6.Bb5+= Nc6 7.Nf3 d6 (7...e5 8.Rb1+=) 8.d4 (8.Rb1 Qc7+=) 8...Bd7 (8...d5 9.Rb1+=) 9.Rb1 Qc7 10.0-0 g6 (10...d5 11.Bd3+=) 11.Na4 (11.e4 Bg7+/–) 11...Bg7+= 12.c4 (12.d5 Nb4 13.Bd7 Qd7+–) 12...0-0 13.Bb2 (13.c5 Bf5 14.Bd3 Bd3 15.Qd3 dc5 16.Nc5 b6+=) 13...Bg4 (13...Bf5 14.Rc1=) 14.c5+= dc5 15.Nc5 White fights for the Initiative. 15...Rfd8 16.h3 Bf5 17.Rc1 Rac8 18.Qb3 Qb8 (18...Ne4!?+=) 19.Bc4+/– b6? (better is 19...e6!?+/–) 20.Bf7+– Kf8 (20...Kh8 21.Ne6 Rd6 22.d5+–) 21.Ne6 Be6 22.Be6 Rc7 23.Ng5 (23.d5 a4 24.Qa4 Rd6+–) 23...h6 (23...a4 24.Qa4 b5 25.Qc2+–) 24.Bg8! (24...Nd5 25.Bd5 hg5 26.Rc6 Rc6 27.Bc6+–) 1–0. Kreuzer,Uwe – Hertlein, Mannschaftspokal, 1992.

6.Bb5+= e5 7.Rb1 Qc7 8.Bb2 +=.

6.Nb5 Nc6 7.Bb2 d6 (7...e5 8.f4 d6 9.Rb1+=) 8.Rb1 (8.Bf6 gf6 9.Nf3 Rg8+=) 8...Qd8 (8...e5 9.f4+=) 9.Nf3 e6 (9...Bg4 10.h3 Bf3 11.Qf3+–) 10.Be2 (10.Bf6 gf6 11.d4 d5+–) 10...Be7 (10...e5 11.d4 e4 12.Nd2+=) 11.c4 (11.d4 d5+=) 11...0-0 12.Qc2 d5 (12...Re8 13.0-0+=) 13.0-0 Bd7 (13...dc4 14.Bc4 Nd5 15.Rfc1+=) 14.Rfc1 (14.Bf6 Bf6 15.d4 dc4+=) 14...Rc8 (14...dc4 15.Ng5 c3 16.Bc3+=) 15.h3 (15.Bf6 gf6 16.d4 Re8+–) 15...dc4+= 16.Bc4 Nd5 17.Qd3 Be8 (17...Nb6 18.Bb3+=) 18.Qe4 Nf6 (18...Qd7 19.Qg4 Nf6 20.Bf6 Bf6 21.d4+=) 19.Qf4 (better 19.Bf6 Bf6 20.d4+–) 19...Bd6?? (better 19...Nh5 20.Qg4 Nf6 21.Bf6 Bf6+=) 20.Nd6+– e5 (20...Nh5 21.Qh2 Rc7 22.Be5 Ne5 23.Qe5+– (23.Ne5?! Qd6 24.Nf3 Qh2 25.Kh2 Nf6+=)) 21.Be5 Ne5 22.Qe5 (22.Ne5?! Qd6 23.Rb7 Qa3+–) 22...Rc6 (22...Nd7 23.Qc3 Ra8 24.Nb7+–) 23.Nf7! Bf7 (23...Bf7 24.Bf7 Double attack; 23...Rf7 24.Bf7 Double attack) 24.Bf7 Rf7 (24...Kh8 25.Rc6 bc6 26.Rb7+–) 25.Rc6 bc6 (25...a4 26.Rb7! Rb7 27.Qe6 Kh8 28.Rc8+–) 26.Rb8 (26.Rb8 Qb8 27.Qb8 Rf8 28.Qc7+–) 1–0. pierred – rbeckett, net–chess.com, 2017.

6.Nb5 d5 7.Nf3 Nc6 (7...Bg4 8.Bb2=) 8.Rb1 Qd8 9.d4 (9.Bb2 Bg4+=) 9...Bf5= 10.Bd3 (10.Be2 Rc8 11.Nh4 Bd7=) 10...Ne4 (10...Bd3 11.cd3 e6 12.Nc3=) 11.Nh4+= e6 (11...Bd7!?+=) 12.Nf5+/– ef5 13.0-0 Qc8 (13...Qd7 14.c4 dc4 15.Bc4+/–) 14.f3 Nd6 15.e4 (15.c3 Rb8+/–) 15...fe4 (15...de4 16.Re1+/–) 16.fe4 de4 17.Nd6 Bd6 18.Be4 Qc7 (18...0-0 19.c3+/–) 19.g3 (19.Qh5 Ra7+/–) 19...Rd8 (19...0-0 20.Qd3 h6 21.c4+/–) 20.c3 (better is 20.Bg5 Rc8 21.Bf5+/–) 20...Bg3? (20...0-0!?+/–) 21.Bc6 (21.hg3 Qg3 22.Bg2 Qc3+–) 21...Qc6 (better is 21...bc6 22.Qe2 Kf8 23.hg3 Qg3 24.Qg2 Qc3+–) 22.Qe2 Kf8 23.hg3 Qc3 (23...b6+–) 24.Rf7! Kf7 25.Rb7 (25...Rd7 26.Rd7 Kg6 27.Qe6 Kh5 28.Qf5 g5 29.Qg5#) 1–0. Lukovski,Lev (2045) – Berger,Gerhard, Wiesbaden op, 2001.

6.Nb5 d6 7.c4 (7.Rb1 e5+=) 7...g6 (7...Bf5 8.d3+=) 8.Rb1 Bg7 9.Be2 0-0 10.a4 (10.Nf3 Nc6+=) 10...Na6 (10...Nc6 11.d3=) 11.Ba3 (11.Nf3 Bf5 12.d3 Nb4+=) 11...Qc6 (11...Qd8 12.d4=) 12.Nf3 Nc5 (12...Bg4 13.0-0+=) 13.0-0+= Rd8 14.d4 Na6 (14...Nce4 15.d5 Qd7 16.Bb2+=) 15.Nd2 Bf5 16.Rc1 (16.Bf3 Qd7 17.e4 Be6+/–) 16...Bc8 (16...Ne4 17.Bf3 Nac5 18.Bc5 (18.dc5?! dc5 19.Qe1 Rd2 20.Be4 Be4 21.Qd2 Bg2+–) 18...dc5 19.d5 Nf2 20.dc6 Nd1 A) < 21.Bd1 bc6 (< 21...Rd2 22.cb7 Rb8 23.Bf3=) 22.Nb3 cb5–/+; B) 21.Rcd1?! bc6 22.Bc6 Ra6+–; C) 21.Rfd1?! bc6 22.Bc6 Rac8+/–; D) 21.cb7+–) 17.f3 (17.Bf3 Qb6+/–) 17...Ne8 (17...Bf5 18.Nb3+=) 18.e4 (18.Nb3 b6+=) 18...Nac7 (18...Nf6 19.Nb3+=) 19.Nb3 19.Bb2 Ne6+=) 19...b6 (19...Bh6 20.Rb1+=) 20.d5 (20.Bb2 Nf6+/–) 20...Qd7 21.c5 dc5 22.Bc5 Nb5 (22...Nd5!? 23.Bf2 Nf4 24.Bb6 Qd1 25.Bd1 Rd7+=) 23.Bb5+/– Qa7 24.Bf2 Nd6 25.Be2 Ba6 26.Rc6 Be2 27.Qe2 Rab8 28.Rb1 Rdc8 29.e5 Rc6 30.dc6 Ne8 31.Nd4 Qc7 32.f4 f6? (32...g5 33.g3+/–) 33.Rc1 (33.Qc4 Kh8 34.Ne6 Qa7+–) 33...Bh6? (better is 33...fe5 34.Ne6 Qd6 35.Ng7 Kg7 36.Qe5 Qe5 37.fe5 b5+/–) 34.Qc4 Kh8 35.Nb5 Qc8 36.c7 Rb7 (36...Nc7 37.ef6 ef6 38.Nc7 Qd7+–) 37.ef6 ef6 38.g3 Bf8 39.Qc6 Bc5 (39...Nc7 40.Bd4 Qe6 41.Qb7 Nd5+–) 40.Bc5 bc5 41.Qc5 Kg7 (41...Kg8+–) 42.Qe7 Kh6 43.Rc5 Ng7 (43...Rc7 44.Nc7 Qb7 45.Qe8+–) 44.Qd8 (44.Qf6 Nf5+–) 44...Qe6 (44...Rc7 45.Qc8 Rc8 46.Rc8+–) 45.Qd2 (better is 45.c8Q Qe3 46.Kg2 Qe2 47.Kh3 Rf7+–) 45...Qc8 (45...Rc7 46.Nc7 Qb6 47.f5 g5 48.Qc2+–) 46.Nd6 (46.f5!? g5 47.Qd8 Rc7 48.Qf6 Kh5 49.Rc7 Qf5 50.Qg7 Qb1 51.Kf2 Qf5 52.Ke3 Qe6 53.Kd4 Kg4 54.Qh7 Qe3 55.Kd5 Qf3 56.Kd6 Qf6 57.Kd7 Qf5 58.Qf5 Kf5 59.Rc5 Kg4+–) 46...Rb1 (46...Qc7 47.Rc7 Rc7+–) 47.Rc1 (47.Rc1 Qc7 48.Rb1 Qc5 49.Kg2 Qc6 50.Kh3+–) 1–0. Sticker,Otto – Werner,Alfons, Baden–ch AT Ladenburg, 1992.

6.Nb5 e5 7.d4 d6 8.Rb1 +=.

6.Nb5 g6 7.Bb2 Bg7 8.Rb1 0-0 9.Nf3 d6 10.Be2 Bd7 11.Ba1 Qc6 12.0-0 Na6 13.d4 Bf5 14.Bd3 Bd3 15.Qd3 Rfc8 16.Rfc1 d5 (16...Nc7 17.Nc7 Rc7 18.Rb5=) 17.Ne5+= Qe8 18.c4 Nc7 19.c5 (19.Nc7 Rc7 20.cd5 Rc1 21.Rc1 Nd5+=) 19...Ne6 20.a4 Nd7 21.Qa3 (better 21.Nd7!? Qd7 22.Nc3+=) 21...Be5=+ 22.de5 Rc5 (22...Ndc5 23.Nc3 Rd8 24.Rb5=) 23.Bd4 (23.Rc5 Ndc5 (worse 23...Nec5 24.Nc7 Qf8 25.Na8 Qa8 26.Bd4+/-) 24.Nc7 Nc7 25.Qc5 Ne6 26.Qd5 Qa4 27.Qb7 Rd8=) 23...Rc1=+ 24.Rc1 Rc8 (worse 24...Nd4 25.ed4 Rc8 26.Nc7=) 25.h3 Rc1 26.Qc1 Qb8 (26...Nb8 27.Qd1=+) 27.Qc3 (27.Qa3 Qd8=) 27...Qd8=+ 28.f4 Nb6 (28...Nb8!?-/+) 29.Qa5= Nc4 30.Qd8 Nd8 31.Kf2 Kf8 (31...Nc6 32.Nc7 e6 33.g4=) 32.Ke2 Nc6 33.Bc5 (33.Nc3 e6+=) 33...b6 34.Bd4 e6 35.Kd3 Ke7 (35...g5 36.Kc3=) 36.e4 (36.Nd6 Nd6 (worse 36...Nd4 37.Nc4 Nc6 38.Nb6+-) 37.ed6 Kd6 38.Bb6 f6=) 36...Nb4 (worse 36...Nd4 37.Kd4 (worse 37.Nd4 Nb2 38.Ke3 de4=+) 37...Nb2 38.ed5 ed5 39.Nc3+/-) 37.Kc3 Na2 38.Kc2 Nb4 (38...de4? 39.Kb3 Ne5 40.fe5 (40.Ka2?! Nd3+-; 40.Be5?! Nc1 41.Kc4 Kd7+-) 40...Nc1 41.Kc4+-) 39.Kb3 Nc6 40.ed5 ed5 41.Kc3 Kd7 (worse 41...Nd4 42.Kd4 Nb2 43.Nc3+/-) 42.g4 g5 (42...Nd8 43.Nd6 Nd6 44.ed6=+) 43.fg5+= N4e5 (better 43...N6e5!? 44.Be5 Ne5=) 44.Bb6+/- Ne7 45.Nd4 N7g6 46.a5 Nf4 (46...Nc4 47.Nf5+/-) 47.h4 (47.a6 Kc8+-) 47...Ng4 (47...Nc4!?+/-) 48.a6+- Kc8 49.Nb5 Ne6 50.Nd6 Kb8 51.Nf7 Ne3?? (51...Ka8+-) 52.Be3 1-0. Mely (2255) - StarterRook (2070), ChessWorld.net, 2016.

8.Bd3 Qd8 A) 9.Bb2 d5 (9...e5 10.Nge2 d5 11.Ng3 g6 12.0-0 Be7 13.a4 0-0 14.f4 Bg4; 9...Be7 10.Nf3 d5 11.0-0 0-0 12.Qe2 Bd7 13.e4 Rc8 14.e5 Nh5) 10.Nge2 Be7 11.0-0 0-0 12.Nb5 e5 13.Ng3 Bc5 14.Nh5 Ne4; B) 9.Nge2 Be7 (9...d5 10.0-0 Be7 11.Na4 0-0 12.Nb6 Rb8 13.Bb2 Ne4 14.Nc8 Rc8; 9...e5 10.0-0 Be7 11.e4 0-0 12.Bb2 d5 13.ed5 Nd5 14.Nd5 Qd5; 9...Ne5 10.Bb5 Qc7 11.0-0 Be7 12.Nd4 0-0 13.Be2 d5 14.Ncb5 Qb6; 9...b6 10.0-0 Ne5 11.Bb5 Qc7 12.d4 Ng6 13.e4 Bb7 14.e5 Nd5) 10.0-0 0-0 11.Nd4 d5 12.f3 e5 13.Nc6 bc6 14.Bb2 Qc7; C) 9.Nf3 Be7 (9...d5 10.0-0 Be7 11.Bb2 0-0 12.Qe2 e5 13.e4 d4 14.Nb5 Be6) 10.0-0 0-0 11.Bb2 d5 12.Qe2 e5 13.e4 d4 14.Nb5 Be6.

8.Nf3 Bc5 9.Na4 Qa7 10.0-0 Be7 11.Bd3 0-0 12.Nb6 Rb8 13.Rb5 d5 14.Bb2 Ne4.

8.Nf3 Qd8 A) 9.Bb2 Be7 (9...d5 10.Ne5 Qc7 11.f4 Bc5 12.0-0 0-0 13.Bd3 d4 14.Nb5 de3) 10.0-0 0-0 11.Qe2 d5 12.e4 Qc7 13.Bd3 de4 14.Ne4 Nd5; B) 9.Qe2 Be7 10.a4 0-0 11.0-0 d5 12.Bb2 Bd7 13.h3 Qc7 14.Rbc1 h6; C) 9.g3 d5 10.Bb2 Bd6 11.0-0 0-0 12.Qe2 Ne4 13.Ne4 de4 14.Nd4 Na7; D) 9.0-0 Be7 (9...d5 10.Qe2 Bc5 11.d4 Be7 12.e4 0-0 13.e5 Ne8 14.h3 Nc7) 10.d4 d5 11.Qd3 0-0 12.e4 Bd7 13.e5 Ng4 14.h3 Nh6.

8.Nf3 Be7 9.0-0 0-0 (9...d5 10.Be2 Qd8 11.Bb2 0-0 12.Nb5 Bd7 13.c4 dc4 14.Rc1 Qb6) 10.Be2 Qd8 11.Bb2 d5 12.Nb5 Bd7 13.c4 dc4 14.Bc4 Rc8.

8.Nf3 Be7 9.Bb2 0-0 (9...d5 10.0-0 0-0 11.Bd3 e5 12.e4 d4 13.Nd5 Qc5 14.Ne7 Qe7; 9...e5 10.0-0 0-0 11.Bc6 bc6 12.Na4 Qc7 13.Be5 d6 14.Bd4 Bb7) 10.Ng5 (10.0-0 d5= 11.Bc6 Qc6 12.Ne5 Qc5 13.a4 Nd7 14.Nd3 Qc4) 10...Qc5 (10...h6 11.Nf3 e5 12.d3 d6 13.0-0 Be6 14.a4 Qc7) 11.h4 (11.Nf3 h6 12.0-0 d5 13.Bd3 Rb8 14.Nb5 Bd7) 11...d5 12.d4 (12.Nf3 h6 13.0-0 Bd7 14.Re1 Ng4) 12...Qd6 (12...Qa7 13.0-0 Bd7 14.Nf3 h6) 13.Bd3 h6 14.f4 (14.Nf3= Bd7) 14...Nd4 (better is 14...Qd8!?=) 15.ed4+/– Qf4 16.Nh3 (16.Nf3!?+/–) 16...Qg3= 17.Nf2 Qg2 18.Qe2 e5? (18...Bd6 19.Ncd1=) 19.Kd2 (19.de5 Ng4 20.Qf1 Qf1 21.Kf1 d4+–) 19...e4? (19...ed4!? 20.Rbg1 Bg4 21.Rg2 dc3 22.Bc3 Be2 23.Be2 Rfd8+=) 20.Rbg1 (20.Nd5 Nd5 21.Be4 Qg3 22.Bd5 Ba3 23.Ba3 Qa3+–) 20...Qf3+/– 21.Qf3 ef3 22.Rg3 Be6 23.Rf3 Rac8 24.Ne2 b5 (24...Nh5!?+/–) 25.Bb5+– Ne4 (25...Rb8 26.Rb3+–) 26.Kc1 (better is 26.Ne4!? de4 27.Re3 Rb8+–) 26...Nd6+/– 27.Bd3 Nc4 28.Bc4 Rc4 29.Nf4 (29.Nd1!? g5+–) 29...Rfc8+/– 30.Ne6 Rc2 31.Kb1 fe6 32.h5 Re2 33.Rc1 Rb8 (33...Rc1 34.Kc1 a4 35.Nh3+=) 34.Rc2 Re1 35.Ka2 a4 36.Nd3 Rh1 37.Nc5 (better is 37.Re3 Rb6 38.Rc8 Kh7 39.Re8+–) 37...e5? (37...Bc5 A) 38.Rc5? Rh2 (38...Rh5 39.Rf2+=) 39.Ka1 Rhb2 (worse is 39...Rbb2 40.Rc8 Kh7 41.Rff8 Ra2 42.Kb1 Rh5 43.Ka2+/–) 40.Rc8 Rc8 41.Kb2 Rc4–+; B) 38.dc5 Rh5 39.Rg3+/–) 38.Nd7 (38.Rf5 ed4 39.Na4 Rh4 40.Rd5 d3+–) 38...e4 (better is 38...Rb7!? 39.Ne5 Rh5+–) 39.Rf5+– (39.Nb8?! ef3 40.Rf2 Rh3=) 39...Rb5 (39...Rd8 40.Rd5 Bg5 41.Re2+–) 40.Nc5 Bg5 41.Ne6 (41.Rd5!? e3+–) 41...Rh5 42.Rf8 (42.Bc1 Kh7+–) 42...Kh7 43.Rc7 Bf6?? (43...Rb2 44.Kb2 Rh2 45.Kb1 Rh1 46.Kc2 Rc1 47.Kb2 Rc7 48.Nc7 Bf6 49.Nd5 Bd4 50.Kc2 Bc5+–) 44.Rf6 (44.Rf6 Rb2 45.Kb2 Rh2 46.Kc3+–) 1–0. Poley,Vladimir (2395) – Daurelle,Herve (2245), 7th Festival IM, Saint Lo FRA, 2005.

8.Nf3 Be7 9.Bd3 Qd8 10.Na4 0-0 11.Nb6 Rb8 12.Rb5 d5 13.Bb2 Ne4 14.0-0 f6.

5.a4 e5 6.Bb2 Bd6 7.Nf3 =+.

5.a4 e6 6.Bb2 cb5 (6...Nd7 7.Nf3=) 7.Bb5 Bd7 8.Nc3 (8.Bd4 Qc7 9.Nc3 Nc6=) 8...Nf6= 9.Nf3 Be7 10.Ne5 Bb5 (10...0-0 11.0-0+=) 11.Nb5+= (worse is 11.ab5 0-0+=) 11...Nc6 12.0-0 0-0 13.Rb1 Qd8 14.Qe2 Rc8 15.Rfc1 h6 16.d3 Ne5 17.Be5 Nd7 18.Ba1 Nc5 19.Bd4 f6 (19...Na4 20.Bg7 Kg7 21.Qg4 Kh7 22.Qa4=) 20.Ra1 (20.Bc5 Rc5 21.Nd4 Qd7+=) 20...e5 21.Bc3 b6 22.d4 Ne4 23.Bb2 Bd6? (better is 23...ed4 24.Bd4 Rc4+=) 24.f3+– Ng5 25.Nd6 Qd6 26.Ba3 Qc6 27.Bf8 Kf8 28.Qb5 (28.de5 fe5 29.Rab1 Ne6+–) 28...Qc3 (better is 28...Qb5!? 29.ab5 ed4 30.ed4 Rc3+=) 29.Qd3 Qc6 (29...ed4 30.Qd4 (worse is 30.ed4 Ne6+/–) 30...Qd4 31.ed4+–) 30.de5 (30.Rab1 e4 31.Qa3 Kg8+–) 30...fe5 31.Rd1 Rd8 (31...e4 32.fe4 Ne4 33.Qd5 Qd5 34.Rd5 Rc2 35.Rd4+–) 32.Ra3 (32.Rab1!? e4 33.fe4 Ne4+–) 32...e4 33.Qe2 (better is 33.fe4!? Ne4 34.c4+–) 33...ef3+/– 34.gf3 Qg6 (34...Rc8!? 35.Kh1 Kg8+/–) 35.Kh1+– Kg8 36.Rf1 (36.e4 Qc6+–) 36...Qd6 (36...Rf8 37.Rd3 Nf3 38.Rf3=) 37.Rb3 Ne6 38.Qb5 Nc5 39.Qb6 (better is 39.Rbb1!? Rb8 40.Rg1+/–) 39...Nb3+= 40.Qd6 (40.Qb3 Rb8 41.Qc3 Rb4+=) 40...Rd6= 41.cb3 Kf7 (41...Re6 42.Re1=) 42.Rd1 Ke6 43.Rd3 Ke5 44.Kg2 Rc6 45.Kg3 Rc2 46.f4 Ke6 47.h3 g6 48.h4 h5 49.Kf3 Rh2 50.Kg3 Rc2 ½–½. Tagirov,Kajum K (1920) – Baiburin,Ildar, 5th Memorial Kopylov, 2008.

5.a4 Nf6 6.Bb2= Bg4 7.Be2 Be2 8.Qe2 Nbd7 9.Nf3 e6 10.0-0 Rc8 11.Rc1 (11.Nc3 Bd6=) 11...Bd6 12.c4 (12.Nc3 0-0=) 12...dc4 13.Rc4 (13.Bd4 Qd8 14.Rc4 Nb6=) 13...0-0 14.d4 (14.Bd4 c5 15.Bf6 Nf6=) 14...cb5 (14...Rfd8 15.e4 Rc7 16.e5 cb5 17.Rc7 Bc7 18.ef6 Nf6 19.ab5+–) 15.Rc8 Rc8 16.ab5 Nd5 17.g3 (17.e4 Nf4 18.Qd2 Nf6+–) 17...Nc7 Exerts pressure on the isolated pawn (17...N7f6 18.e4 Nb4 19.Nc3=) 18.Nc3= Bb4 19.Qc4 (19.Ra4 Bc3 20.Bc3 Qb5 21.Qb5 Nb5 22.Ba5 Ra8+=) 19...Qd6 (19...Nf6 20.Qd3+=) 20.e4 Nf6 (better is 20...Nb6 21.Qd3 Bc3 22.Bc3 Nb5 23.Ba5 Nc4=) 21.Na4?? (21.e5 Qd8 22.Na2 Ncd5=) 21...Ra8?? (better is 21...Ne4 22.Nc5 Ne8–+ (22...Bc5?! 23.dc5 Qd5 24.Qd4 Qd4 25.Nd4–/+)) 22.Rc1?? (better is 22.e5 Qd8 23.ef6 Qf6 24.Nb6+–) 22...Nfe8 (22...Rc8 23.b6 Qd7 24.Qc2+– (24.bc7?! Qa4 25.Qe2 Ne8+=)) 23.Ne5 Rd8 (23...Bd2 24.Rc2 Bb4 25.b6=) 24.b6 (24.Nc5 Qb6=) 24...Na6= 25.Qe2 Nf6 26.Nc6?? White prepares the advance e5 (26.Qf3!?=) 26...bc6+= 27.e5 Qd5 28.ef6 Qb5 (28...Qb3 29.Ra1 Nb8 30.fg7+=) 29.Qb5 (29.Qc2 Nb8=) 29...cb5 30.Nc5 Nb8 (30...Ra8=) 31.b7 (better is 31.fg7!? Rd6 32.Nb7+=) 31...gf6+= 32.Ne4 (32.Rb1 a4+=) 32...f5 33.Rc8 White terminates the opponent with strong threats 33...Be7 34.d5?? (better is 34.Nc5+=) 34...fe4–+ 35.d6 Bg5 (35...Bd6 Deflection from d8 36.Rd8 A double attack) 36.h4 e3 (better is 36...Bh4!? 37.gh4 Rf8=) 37.hg5+= Threatening mate... how? 37...Rf8 (better is 37...ef2!? 38.Kf2 Rf8+/–) 38.fe3+/– f5? (better is 38...a4+/–) 39.d7 Nd7 40.Rc7 (40.Rc7 a4 41.Rd7+–) 1–0. Marinelli,Giorgio – Petronelli,Adriano, Asigc CEM01, 1997.

5.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Qb6 4.a3 a5 5.b5).

5.Nc3 e5 6.d4 e4 7.Na4 Qd8 8.bc6 bc6 9.c4 Nf6 10.c5 Nbd7 11.f4 (11.Rb1 Be7=) 11...ef3 (11...Be7 12.Rb1=+) 12.gf3= Nh5 13.Bd3 Qh4 14.Kd2 Ba6 15.Ba6 Ra6 16.Qf1 Ra8 17.Qh3 Qh3 18.Nh3 Rb8 19.Kd3 f5 (19...Nhf6 20.Bd2+/-) 20.Bd2+/- Be7 21.Rab1 (21.Ba5 Ra8-+) 21...0-0 22.Rhc1 (worse 22.Ba5 Rb1 23.Rb1 Ra8=+) 22...g5 (22...Rfc8 23.Nb6 (worse 23.Ba5 Rb1 24.Rb1 Ra8=+) 23...Nb6 24.Rb6 Rb6 25.cb6+=) 23.Ng5 (better 23.Nb6 Nb6 24.cb6+-) 23...Bg5+= 24.Rb8 Rb8 (24...Nb8? 25.Rg1 h6 26.h4+- (26.Ba5 Kf7=+)) 25.Rg1 h6 26.h4 Kf7 (26...Ng7 27.hg5 hg5 28.Rg5 Rb3 29.Nc3 Ra3+/-) 27.hg5+/- hg5 28.Rg5 (28.Ba5 Ra8 29.Nb6 Nb6 (worse 29...Ra5 30.Nd7 Ra3 31.Kc2+/-) 30.Bb6 Ra3 31.Kd2 f4 32.Rg5 fe3 33.Kc2 Ng7-/+) 28...Ng7 29.Bc3 (29.Nc3!?+/-) 29...Rb3+= 30.Kc2 Rb8 (30...Ra3 31.Nb6 Nb6 32.cb6+-) 31.Rg1 (31.Ba5?! Ra8 32.Nb6 Nb6 (32...Ra5? 33.Nd7 Ra3 34.Ne5 Kf8 35.Kd2+-) 33.cb6 Ra5=) 31...Ne6 (31...f4 32.e4 Ne6 33.ed5 cd5 34.Nb2+-) 32.Rb1 (32.Ba5 Ra8 33.Nb6 Ra5 34.Nd7 Ra3 35.Ne5 Ke8+-) 32...Rh8 (32...Rb1 33.Kb1 f4 34.ef4+/-) 33.Rb7 Ke8 34.Ba5 Rh3 (better 34...Rh2 35.Kd3 Rh3+-) 35.Nb6 Nf6 (35...Nef8 36.Rc7 Rf3 37.Bd2+-) 36.Nc8 Ng5 (36...Kf8 37.Nd6 Nh5 38.Rf7 Kg8 39.Rf5+-) 37.Nd6 Kf8 38.Bd8 Nfh7 39.a4 (better 39.Rb8 Kg7 40.Nf5 Kg6 41.Ne7 Kf7 42.Nc6 Nf3+-) 39...Rf3 40.a5 Re3 (40...Ne6 41.Rb8 Rf2 42.Kb3 Nd8 43.a6+-) 41.Bc7 (better 41.Rb8 Kg7 42.Nf5 Kg6 43.Ne3+-) 41...Re7 (41...Ra3+-) 42.Bb8 (42.Bb8 Re6 43.Nf5 Re2 44.Kb3+-) 1-0. Tsoi,Dmitry (2325) - Galchenko,Vadim (2135), St Petersburg RUS, 2019.

5.Nc3 Nf6 6.Bb2 e5 7.Na4 Qc7 8.c4 Bf5 9.Nf3 Nbd7 10.cd5 Nd5 11.Rc1 Bd6 12.d4 0-0 13.bc6 bc6 14.de5 (14.Bb5 Ne7=) 14...Ne5 (14...Be5?? 15.Ne5 Ne3 16.Nc6 Qc6 17.Rc6 Nd1 18.Kd1+–) 15.Nd4 Bg4 (15...Qd7!?=) 16.Be2+= Be2 17.Qe2 Qd7 (17...Qe7 18.Nf5 Qe6 19.Nd6 Qd6 20.0-0+=) 18.0-0+= Rab8 19.Rfd1 Rfc8 20.g3 Ne7 (20...c5!? 21.Nb5 Rb5 (21...Qb5?? 22.Qb5 Nf3 23.Kg2 Rb5 24.Rd5+–) 22.Rd5 c4 23.Be5 Rd5+/–) 21.Nb3+/– Qf5? (better is 21...Nd5 22.Na5 Rb5+–) 22.Rd6+– (22.Rd6 Rb3 23.Be5 Qe5 24.Qd1+–) 1–0. bollewillem (2260) – antinephilehi (2160), gameknot.com, 2014.

5.c4 e5 6.cd5 cd5 7.Bb2 =.

5.c4 e6 6.Nc3 Nf6 7.Nf3 Nbd7 8.Be2 Be7 9.0-0 0-0 10.Bb2 Ne4 11.cd5 cd5 12.Ne4 de4 13.Ne5 Nc5 14.a4 f6 15.Nc4 Qd8 16.b6 (16.f3 ef3 17.Bf3 e5+=) 16...Nd3 17.Bc3 (17.Ba3 Ba3 18.Ra3 e5+=) 17...Qd5 18.Qb3 Bd7 19.f3 f5 20.fe4 fe4 21.Rf8 Bf8 22.Qa2 h6 (22...Bb4!? 23.Bd3 Bc3 (worse is 23...Qd3 24.Bb4 ab4 25.Ne5+/–) 24.Be4 Qe4 25.dc3 Rc8 26.Na5 Rc3+= (worse is 26...Qe3 27.Qf2 Qc3 28.Rf1+/–)) 23.Bd3+/– ed3 24.Ne5 Qd6 25.Qc4 (25.Nd7?! Qd7 26.Qc4 Rc8=) 25...Be8 26.Bd4 Qb4? (better is 26...Rd8!?+/–) 27.Qe6+– Kh8 28.Bc3 (28.Rf1 Qe7 29.Ng6 Bg6 30.Qg6 Kg8 31.Qd3 Qe6+–) 28...Qd6 29.Qf5 Kg8 30.Rf1 (30.Nd3 Bg6 31.Qf3 Bd3 32.Qb7 Rb8=) 30...Ba4? (30...Be7+–) 31.Qf7 Kh7 32.Ng4 (better is 32.Qb7 Re8 33.Qe4 Kg8 34.Qa4 Qe6+–) 32...Kh8 (32...Be8 33.Qf8 Qf8 34.Rf8 a4+–) 33.Nf6! (33.Qb7?! Rb8 34.Qc7 Qc7 35.bc7 Rc8+–) 33...Bb3 (33...gf6 34.Rf6 Mate attack) 34.Qb3 (34.Qb3 gf6 35.Rf6 Qf6 36.Bf6 Bg7 37.Bg7 Kg7 38.Qd5+–) 1–0. Kostrun,Slaven (2245) – Sinanovic,Muhamed (2380), CRO–chT, 2005.

5.c4 e6 6.Nc3 Nf6 7.Nf3 Be7 8.Be2 0-0 9.0-0 dc4 10.Bc4 cb5 11.Nb5 Bd7 12.Rb1 Qc5 13.d3 Rc8 14.Qe2 Nc6 15.e4 Ne5 (15...Qh5 16.d4=) 16.Be3+= Nf3 17.Qf3 Qe5 18.Rfc1 a4 19.g3 (19.h3 Qb8+=) 19...Qb8= 20.Kg2 e5 21.Qe2 Ng4 22.Bb6 Kf8 23.f3 Nf6 24.Qb2 Ne8 25.Nc3 Nf6 26.Bf2 h6 27.Rc2 Qc7 28.Rbc1 Qb8 (28...Qd6 29.Nb5 Bb5 30.Qb5 Qa3 31.Qe5+=) 29.Nb5+/– Bc6 30.d4 ed4 (30...Ne4 31.fe4 Be4 32.Kg1 Bc2 33.Qc2+/–) 31.Nd4 (31.Bd4!? Bb5 32.Bb5 Rc2 33.Rc2+/–) 31...Qe5?? (better is 31...Ne4 32.Nf5 Bf6+=) 32.Ne6!+– (32.Ne6 Qe6 33.Be6 fe6 34.Bc5+–) 1–0. Woelfelschneider,Peter – Seipel, 2009.

5.c4 Bf5 6.a4 (6.Nc3 Nf6=) 6...e5 7.cd5 cd5 8.Qb3 (8.Nf3 Nd7=+) 8...Nf6 9.Bb2 Nbd7 10.Nf3 Bd6 11.d4 e4 12.Nfd2 0-0 13.Nc3 Be6 14.Be2 Rac8 15.Rc1 Qd8 16.h3 (16.Ba3 Nb6=) 16...Qe7 17.0-0 Bb4 (17...Rc7 18.Na2=+) 18.Rc2 Nb6 19.Rfc1 Qd7 (19...Nfd7 20.Na2 Rc2 21.Rc2=+) 20.Bf1 (20.Ba3 Qd6 21.Bb4 Qb4 22.Qb4 ab4=) 20...Qe7 (20...Nc4 21.Ndb1=) 21.Na2 (21.Be2 Nfd7=) 21...Rc2=+ 22.Rc2 Bd6 23.Nb1 Rc8 (23...Nc4 24.Nac3 Nb2 25.Qb2=+) 24.Rc8= Nc8 25.Ba3 Ba3 26.Qa3 b6 27.Qe7 Ne7 28.Nac3 h5 29.Nd2 g5 (29...Nf5 30.Be2=) 30.f3 ef3 31.gf3 Kg7 32.e4 h4 33.Kf2 Nh5 34.ed5 Nd5 35.Nd5 Bd5 36.Bc4 Nf4 37.Bd5 Nd5 38.Nc4 Kf6 39.Ke2 Ke6 40.Kd3 (better 40.Kd2!?=) 40...f5-/+ 41.Ne3? (better 41.Ke2!? Nc3 42.Kd3-/+) 41...Nf4 (41...Ne3!? 42.Ke3 Kd5 43.f4-+) 42.Kc4 (42.Kd2 Nh3 43.d5 Kf6-+) 42...Nh3 43.d5 Ke5 44.d6 Kd6 45.Nf5 Ke5 46.Ne7 Nf4 (46...Nf4 47.Nc6 Kf6-+) 0-1. Mely (2235) - Perigord (2355), ChessWorld.net, 2016.

5.bc6 bc6 6.c4 Nf6 7.Nc3 e6 8.Nf3 Be7 9.Rb1 Qd8 10.Be2 0-0 11.0-0 Nbd7 12.d4 dc4 13.Bc4 c5 14.Ne5 (14.Qe2 cd4 15.Nd4 Ne5+=) 14...Ne5 15.de5 Qd1 16.Rd1 Nd7 17.f4 Rb8 18.Bb5 Rd8 19.Rb2 Nf8 20.Rd8 Bd8 21.Rd2 Be7 22.a4 Bb7 23.Ba3 f6 24.ef6 Bf6 25.Nd1 Rc8 26.Rc2 Attacking the isolated pawn on c5 26...Be7 27.Nb2 Rd8 28.Kf2 (worse is 28.Bc5 Rc8 29.Nd3 Be4 30.Be7 Rc2+=) 28...Be4 29.Re2 Ng6 30.g3 Kf7 31.Nc4 Rd1 32.Re1 Rd3 33.Bc1 Rc3 34.Bb2 (worse is 34.Na5 Rc2 35.Kf1 Rh2+=) 34...Rb3 35.Ba1 Bd3 (35...Bd5 36.Na5 Ra3 37.Bb2+/–) 36.Na5 Bb5 37.Nb3 Ba4 38.Nd2 Nf8 39.Rc1 Nd7 40.Bb2 Bb5 41.Ba3 e5 42.Ne4 ef4 43.ef4 (43.Nc5?! fe3 44.Ke3 Bg5 45.Kd4 Bc1 46.Bc1 Nc5 47.Kc5 Be2=; 43.gf4?! c4 44.Be7 Ke7+–) 43...c4 44.Be7 Ke7 45.Nd2 Nc5 46.Ke3 Nd3 (46...Nb3 47.Nb3 cb3 48.Rc3+–) 47.Rb1 (47.Rb1 Ba6 48.Rb6+–; 47.Rc4?! Bc4 48.Nc4 Nc5+/–) 1–0. Bauer,Christian (2630) – Isik,Engin Yasar (2205), EU–Cup, 2007.

5.bc6 Nc6 6.Nc3 Nf6 =.

5.d4 Nf6 6.c4 (6.Nc3 Bg4 7.f3 Bd7 8.Rb1=; 6.bc6 Nc6 7.Nd2 Bf5 8.Ngf3=) 6...dc4 7.Bc4 Bf5 8.Nc3 =.

5.Nf3 Bg4 6.bc6 Qc6 7.Nc3+= e6?? (better is 7...Nd7+=) 8.Bb5+– (8...Bd6 9.Bc6 Nc6 10.Rb1+–) 1–0. Bendig,Frank (2260) – Hasler,Ueli, CiF, 2005.

5.Nf3 Bg4 6.bc6 Nc6 7.Nc3 Nf6 8.Rb1 =.

5.Nf3 Bg4 6.h3 Bf3 7.Qf3 e5 8.Bb2 Nd7 9.Qg3 f6 10.Be2 Ne7 11.0-0 g6 12.f4 Nf5 13.Qg4 ef4 14.Rf4 Bd6 (< 14...cb5 15.Nc3+=) 15.Rf5 gf5 16.Qh5 Ke7 17.Qf5 Be5 18.Bg4 Qc7 (18...Bb2?? 19.Qd7 Kf8 20.Bh5 Qe3 21.de3 Ba1 22.Qf7) 19.d4 Bh2 20.Kh1 Nf8 (20...cb5? 21.Nc3 Qd6 22.Nd5 Kf7 23.Qd7 Qd7 24.Bd7+–) 21.Nc3 Rd8 22.Rf1 Nd7?? (22...Qd6 23.e4 Nd7 24.ed5+–) 23.a4 (better is 23.Qe6!? Kf8 24.Rf6 Nf6 25.Qf6 Ke8 26.Qh8 Kf7 27.Qh7 Kf8 28.Qh6 Ke8 29.Bh5 Kd7+–) 23...Bg3?? (better is 23...Qd6+/–) 24.Ba3 Kf7 25.Bh5 Kg7 26.Be7 (26.Qg4 Kh6 27.Bc1 Rhg8 28.e4 Qf4 29.Bf4 Bf4 30.Qf4 Kh5 31.bc6 bc6 32.ed5 c5 33.dc5 Kg6+–) 26...Rdf8 27.Ne2 Bd6 (27...Kh6 28.Bf8 (< 28.Ng3 Qg3 29.Bf8 Rf8 30.Qd7 Qg7+–) 28...Rf8 29.Ng3 Qg3 30.Qd7+–) 28.Nf4 (better is 28.b6 Qd8 29.Qg4 Kh6 30.Bd6 Rhg8 31.Bf4 Rg5+–) 28...Bf4 29.Rf4 (29.ef4?! Rhg8+–; 29.Qf4?! Qf4 30.Bf8 Nf8 31.Rf4 Ng6+=; 29.Bf8?! Rf8 30.Rf4 Nb6+–) 29...Rhg8 30.Bf8 (30.Be8 Qf4 31.Bf8 Kf8 32.ef4 Ke8 33.Qe6 Kf8 34.Qd7 cb5 35.Qc8 Kg7 36.Qb7 Kh8 37.ab5 Rf8+–) 30...Rf8 31.Rh4 Rh8?? (31...Nb8 32.Qg4 Kh8+–) 32.Rg4 Kf8 33.Qe6 (33...Qh2 34.Kh2 cb5 35.Qd6) 1–0. Kuhlenbaeumer,Willi (2165) – Meirick,Ingo (1990), Muensterland Verbandsliga, 2003.

6.Bc4 cb5 7.Qb3 e6 8.Qb5 Qb5 9.Bb5 Bd7 10.Nc3 =.

6.Bc4 Qc5 7.Be2 =.

6.Bc4 Bf5 7.Qb3 e6 8.Nc3 Nf6 (8...Bd6 9.e4 Bg4 10.f3=) 9.Nf3 Be7 (9...Bd6 10.d3=) 10.0-0 0-0 11.Na4 (11.d3 cb5 12.Nd4 Bg6=) 11...Qc7 12.Bb2 Nbd7 13.Rac1 (13.Nd4 Bg6=) 13...Ng4 (13...Bd6 14.d3=) 14.h3 (14.bc6 bc6 (worse is 14...Qc6 15.Bd3 Qd6 16.Bf5 ef5 17.Qb7+/–) 15.d3 Rab8=) 14...Nge5= 15.Be2 Be4 (15...Nf3 16.Bf3 Ne5 17.Be2=) 16.Ne5 Ne5 17.Bd4 (17.d4 Ng6+=) 17...Nd7 (17...Rab8 18.f4 Nd7 19.d3+=) 18.Nc5 (18.Nc3 Bg6=) 18...Nc5 (18...Bd5 19.Qb2=) 19.Bc5 Bc5 (19...Bd5 20.Qc3=) 20.Rc5 Qd6 (20...b6 21.Rcc1 c5 22.d4=) 21.d4 Rfe8 (21...b6 22.Rc3 cb5 23.Qb5+=) 22.Rfc1 (22.bc6 bc6 23.Qc3 Bd5+=) 22...Rac8 (22...e5!? 23.de5 Re5 24.Re5 Qe5=) 23.bc6+/– Rc6 24.Bb5 (24.Qb7 Rc5 25.dc5 Qd2 (25...Bb7? 26.cd6 Rd8 27.Rc7+–) 26.Qe4 Qc1 27.Bf1 Rc8–+) 24...Rb6 25.Qc3 (25.Qa4 Bc6+/–) 25...Bc6 (25...Ra8 26.Qd2 Qd8 27.f3+/–) 26.Bc6 (worse is 26.Rc6 bc6 27.Bd3 Qd5–/+; 26.Qa5?! Bb5 27.Rb5 Rc6+/–) 26...Rc6 (26...bc6 27.Rc6 Rc6 28.Qc6+–) 27.Rc6 Qc6 (27...bc6 28.Qa5 Rc8 29.Qc5+–) 28.Qc6+– bc6 29.Rc6 Ra8 30.Kf1 g6 (30...Kf8 31.Rc7+–) 31.Ke2 Kg7 32.a4 h5 33.Rc5 Kf6 (33...h4 34.e4+–) 34.Kf3 (34.g4 hg4 35.hg4 g5+–) 34...Ra7 (34...Ke7 35.e4+–) 35.g4 hg4 36.hg4 g5 37.Ke4 Ra6 (37...Ra8 38.f4 gf4 39.Kf4+–) 38.Kd3 Ra7 39.Kc4 Rb7 40.Rb5 (40.Ra5 Rb1+–) 40...Rc7 41.Kd3 Ra7 42.f3 Ra6 43.Ke4 Ra8 (43...Kg6 44.f4 gf4 45.ef4+–) 44.d5 (44.f4 gf4 45.Kf4 Ke7+–) 44...Ra6 45.Kd4 ed5 46.Rd5 Kg6 47.e4 (47.Kc5 f6+–) 47...Rb6 (47...Rf6 48.Rf5 Ra6 49.Kc4+–) 48.Ra5 Rb3 49.Rf5 (better is 49.Rb5!? Rf3 50.a5+–) 49...Rb4+/– 50.Ke5 Ra4 51.Rf6 Kg7 52.Kf5 Ra5 53.e5 Rb5 54.Kg5 (54.Rd6 Rb3+–) 54...Re5+/– 55.Rf5 Re1 (55...f6 56.Kf4 Re1 57.Rd5+/–) 56.f4 Ra1 57.Rb5 Ra2 58.Rb6 (58.Rb7 Ra5 59.f5 Rd5+/–) 58...Ra5 59.f5 Rc5 60.Rb4 Ra5 61.Kf4 Rc5 62.Rd4 Ra5 63.g5 Ra1 64.Ke5 (better is 64.Re4!?+/–) 64...Rg1+= 65.Kf4 (better is 65.Rd7 Rg5 66.Rd8+=) 65...Rf1 (65...Ra1 66.Rc4 Rg1+/–) 66.Kg4+/– Rh1 67.Rd7 (better is 67.Rc4!?+/–) 67...Rg1+= 68.Kf4 Rf1 69.Ke5 Re1 70.Kd6 Rd1 (70...Rf1 71.f6 Kg6 72.Ke7=) 71.Ke7 (71.Kc6 Rc1 72.Kb5 Rf1=) 71...Re1= ½–½. Kreuzer,Uwe – Beck,Gerald (2255), VL Nord, 1993.

6.Bc4 Bf5 7.Nc3 e6 =.

6.Bc4 Bf5 7.Nc3 Nf6 8.Nf3 e6 9.Qb3 (9.d3 Be7+=) 9...c5 (9...Bd6 10.d4=) 10.Na4 Qd6 11.Bb2 Nbd7 12.d4 b6 (12...Be4 13.dc5 Nc5 14.Nc5 Qc5 15.Rc1=) 13.Rd1 Qc7 (13...Qe7 14.Bd3+=) 14.d5+/– 0-0-0 (better is 14...e5!?+/–) 15.de6+– fe6 (15...Be6 16.Be6 fe6 17.Qe6+–) 16.Be6 Be6 17.Qe6 Re8 18.Qc6 Qc6 19.bc6 Nb8 20.Bf6 gf6 21.Nb6 Kc7 22.Nd5 Kc6 23.Nf6 Re6 24.Nd5 Bg7 25.0-0 (25.Nf4 Re7+–) 25...Nd7 26.Nf4 Re4 (26...Ree8 27.Rd5 Nb6 28.Rh5+–) 27.Rd2 Nb6 28.Rfd1 (28.Rc1 Rhe8+–) 28...Nc4 29.Rd7 Bc3 (29...Bd4 30.Ra7+– (30.ed4?! Kd7 31.Nd3 Re7+/–; 30.Nd4?! Kd7 31.Nde6 Kc6+=; 30.R1d4?! Rd4 31.Rd4 cd4+/–)) 30.a4 (30.Ng5 Ree8+–) 30...Rf8 (30...h6+–) 31.Ng5 (31.Rh7?! Nb2 32.Rdd7 Na4 33.Rc7 Kb5+–) 31...Ref4 (31...Rd4 32.ed4 (32.R1d4?! cd4 33.Rh7 de3+–) 32...Kd7 33.dc5 Kc6 34.Nd5+–) 32.ef4 Bd4 33.R7d4 (33.Rh7 Nb2 34.Rd2 Rf4+–) 33...cd4 34.Rd4 Nb6 (34...Nb2 35.Nh7 Rb8 36.h4+–) 35.g3 (35.g4 Rg8 36.f3 Rg7+–) 35...h6 36.Ne4 Rf5 37.Kf1 (37.Rd6 Kc7+–) 37...Rd5 38.Rd5 Kd5 39.Nd2 Kc5 40.g4 Na4 (40...Nd5 41.g5 Nf4 42.gh6+–) 41.g5 hg5 42.fg5 (42.fg5 Kd5 43.Nb3+–) 1–0. Steffens,Olaf (2285) – Doescher,Arne (2210), Oberliga Nord W, 2000.

6.Bc4 Nf6 7.Qb3 e6 8.Nc3 Nbd7 (8...Bd6 9.d4=) 9.Na4 (9.d4 c5=) 9...Qc7 10.Nf3 Be7 (10...cb5 11.Bb5 Be7 12.Bb2+=) 11.0-0 Nb6 (11...cb5 12.Bb5 0-0 13.Bb2=) 12.Nb6+= White fights for the Initiative 12...Qb6 13.bc6 (13.Ne5 a4 14.Qb2 Rb8+=) 13...Qb3= 14.Bb3 bc6 15.Ba4 Bd7 16.Ne5 c5 (16...Rc8 17.d3=) 17.Nd7+= Nd7 18.Bb2 Bf6 (18...f6 19.d3=) 19.Bf6+/– gf6 20.Rfc1 Ke7 (20...Rc8 21.Rab1 Ke7 22.Rb5+/–) 21.Bd7 Kd7 22.Rc5 Rhc8 23.Rac1 Rc5 24.Rc5 e5 (24...Kd6 25.d4+/–) 25.Kf1 Kd6 26.Rb5 a4 27.Ke2 (27.Rb4 Rc8+–) 27...Kc6 (27...Rg8!?+/–) 28.Rb4+– f5 29.Rh4 Kd5 (29...f6 30.Rh7 Rg8 31.g3+–) 30.Rh7 Ke6 31.Rh6 f6 32.Rh7 (32.Rh4 e4+–) 32...Rg8 33.g3 Ra8 (33...Rc8 34.h4+–) 34.Rb7 e4 (34...Kd5 35.d4+–) 35.Rb6 Kf7 (35...Ke7 36.Rb4+–) 36.Rb4 Kg6 37.f3 ef3 38.Kf3 Ra5 39.d4 Ra6 40.Kf4 (40.h4 Kh5+–) 40...Ra5 (40...Rc6 41.Rb8+– (worse is 41.Ra4 Rc2 42.Kf3 Rh2+–)) 41.Rc4 Ra6 42.d5 (42.h3 Ra7+–) 42...Rd6 43.e4 fe4 44.Ke4 (44.Re4?! Rd5 45.Ra4 Rf5 46.Ke3 Rh5+–; 44.Ra4?! Rd5 45.Re4 Rf5 46.Ke3 Rh5+–) 44...Ra6 45.Rd4 Kf7 46.d6 Ke8 47.Kf5 Kd7 48.Kf6 Rc6 49.Ra4 (49.g4 Rc3 50.Ra4 Kd6+–) 49...Rd6 50.Kf5 (50.Kf5 Rd1 51.h4+–) 1–0. Kreuzer,Uwe – Baeuschlein,A, Landesliga Mannheim, 1991.

6.Nc3 dc4 7.Bc4 Bf5 8.d3 =.

6.Nc3 e5 7.bc6 bc6 8.Nf3 (8.d4 e4=) 8...d4 (8...e4 9.Nd4 c5+/–) 9.Na4+= Qc7 10.ed4 Bd6?? (better is 10...ed4 11.Nd4 Be7+/–) 11.c5 (better is 11.de5!? Be5 12.Qe2 0-0 13.Ne5 Re8+–) 11...Be7 12.Nb6 (12.Ne5?! Nbd7 13.Bb2 Rb8+–) 12...Ra7 13.Nc8 (13.Ne5?! Be6 14.Bb2 Nbd7+/–) 13...Qc8 14.de5 (worse is 14.Ne5 0-0+–) 14...Nd5 15.d4 0-0 16.Bc4 (16.Bd3 Rb7+–) 16...Rd7 (16...f6 17.0-0+–) 17.0-0 Nc7 (17...Ra7 18.Qa4+–) 18.Qa4 Rfd8 (18...Ne6 19.Rb1+–) 19.Qa5 Rd4 (19...Ne6 20.Be3+–) 20.Nd4 Rd4 21.Qc3 Qg4 (21...Rd8 22.Be3+–) 22.Qb3 (22.Qb3 Rd8 23.Bf7 Kf8 24.Qc4+–) 1–0. Theoryhack – blackcrowman, ChessWorld.net, 2009.

6.Nc3 g6 7.Bb2 dc4 8.Bc4 Bg7 9.Qb3 0-0 10.Nf3 Nbd7 11.Bf7 (better is 11.d4!?+=) 11...Rf7+= 12.Ng5 Ne5 13.d4 Nd3 14.Ke2 Nb2? (14...Nd5 15.Nf7 Nb2+–) 15.Qf7+– Kh8 16.Qb3 h6 17.Nf7 (17.Qb2?! hg5 18.Rab1 Bf5=) 17...Kh7 18.Qb2 c5 19.Na4 Qe6 20.Ne5 cd4 21.ed4 Nd7 22.Qa2 Qf5 (22...Ne5 23.Qe6 (23.de5? Qe5 24.Kf1 Be6–+) 23...Be6 24.de5 Bc4 25.Ke3 Bb5 26.Nc5 Be5 27.Rab1+/– (worse is 27.Nb7 Ba1 28.Ra1 Bc6+=)) 23.Qb1+– Qe6 24.Qe4 Ne5 25.de5 Be5 26.Rad1 Bd7 27.Qd5 Qg4 28.f3?? Qg2–/+ 29.Ke3 Qg5 30.Kf2 Bb5!–/+ 31.Rhg1?? Qh4–+ 32.Rg3 Bg3 33.hg3 Qh2 34.Ke3 Qe2 35.Kf4 Rf8 36.Kg4 Ba4 37.Rd3 Bc2 38.Rd4 h5 (38...h5 39.Kh3 Rf3–+) 0–1. Krebbers,Wilfried (2160) – Proettel,Sven (2170), Goch op, 2005.

6.d4 cb5 7.c5 A) 7...Qd8 8.Bb5 (8.Nc3 b6 9.cb6 Qb6 10.Bb5 Bd7 11.Bd3 e6 12.Nf3 Bd6 13.Qc2+=) 8...Bd7 9.Nc3 b6 10.cb6 Qb6 11.Bd3 Nc6 12.Rb1 Qc7 13.Nb5+=; B) 7...Qc7 8.Nc3 (8.Nf3 b6 9.Bb5 Bd7 10.cb6 Qb6 11.Bd3 Nc6 12.Nc3 Rc8 13.Rb1+=; 8.Bb5 Bd7 9.Bd3 e5 10.Be2 ed4 11.ed4 b6 12.cb6 Qb6 13.Nf3=) 8...b4 9.ab4 Nc6 10.b5 Nd8 11.b6 Qd7 12.Nb5 Ne6 13.Na7+–; C) 7...Qe6 8.Nc3 (8.Bb5 Bd7 9.Bd3 b6 10.cb6 Qb6 11.Nc3 e6 12.Rb1 Qc7 13.Qc2+=) 8...b6 9.cb6 Qb6 10.Bb5 Bd7 11.Bd3 e6 12.Nf3 Bd6 13.Qc2+=.

6.d4 dc4 7.Bc4 A) 7...Bf5 8.Ne2 (8.Nf3 e6 9.Nc3 Be7 10.0–0 0–0 11.bc6 Nc6 12.Nh4 Bg4 13.f3=; 8.Qa4 e6 9.Ne2 Ne4 10.bc6 Nc6 11.f3 Nd6 12.e4 Nc4 13.Qc4=; 8.Nd2 e6 9.Qa4 Bd6 10.Be2 Qc7 11.Nc4 Be7 12.b6 Qd8 13.Bd2=; 8.Nc3 e6 9.f3 Bg6 10.e4 Nbd7 11.Nge2 Rc8 12.bc6 Qc6 13.Bb5+=) 8...e6 9.Nbc3 Nbd7 10.f3 Rd8 11.bc6 Qc6 12.Bb5 Qc8 13.e4+/–; B) 7...cb5 8.Qb3= e6 9.Qb5 Qb5 10.Bb5 Bd7 11.Bd3 Bc6 12.Nf3 Nbd7 13.Nbd2=.

6.d4 Bf5 7.c5+= Qc7 8.b6 Qd8 9.Nf3 e6 10.Be2 Be7 (10...Ne4 11.Bd2=) 11.0-0+= 0-0 12.Nbd2 Re8 13.a4 h6 (13...Na6 14.Nh4+=) 14.Nb3+/- Ne4 15.Bd2 Nd7 16.Na5 Qb8 17.Nb3 e5 18.a5 Nd2 (18...Qc8 19.Ne5 Ne5 20.de5 Nc5 21.Nd4+/-) 19.Nfd2 (19.Qd2 ed4 20.Nfd4 Be4+-) 19...ed4 20.ed4 (20.Nd4?! Bg6=) 20...Qc8 21.Re1 Nb8 22.a6 (22.Nf1!?+/-) 22...Na6+= 23.Na5 (better 23.Ba6 Ra6 24.Ra6 ba6 25.Qf3+/-) 23...Nb4-/+ 24.Ndb3 (better 24.Nab3!? Nc2 25.Ra8 Qa8 26.Rf1-/+) 24...Nc2-+ 25.Bd3? (better 25.Qd2-+) 25...Ne1 (25...Na1?! 26.Bf5 Qf5 27.Qa1-+) 26.Bf5 Qf5 27.Qe1 Bc5! 28.Qc3 (28.Nc5 Re1 Discovered attack; 28.dc5 Re1 Discovered attack) 28...Bb6 29.Nb7 (29.Rf1 Qd7 30.Ra1-+) 29...Ra1 (better 29...Qc2! 30.Qa5 Ba5 31.N3a5 Re4-+) 30.Qa1 Qc2 31.N7c5 (31.Nd6 Re6 32.Nc8 Qb3 33.Nb6 Qb2-+) 31...Bc5 32.Nc5 (32.dc5 Qb3 33.h4 Qb4-+) 32…Qd2 (32...Qd2 33.g3 Re1 34.Qe1 Qe1 35.Kg2 Qc3-+) 0-1. Mely (2235) - Perigord (2265), ChessWorld.net, 2016.

6.d4 Bg4 7.f3+= (7.Nf3 dc4 8.Bc4 e6 9.Nc3 Nbd7 10.h3 Bh5 11.Na4 Qc7 12.Bb2 Bd6 13.Rc1=) 7...Bf5 8.c5 (8.g4 Bg6 9.c5 Qc7 10.b6 Qd8 11.h4 h5 12.g5 Nfd7 13.Nc3=; 8.Nc3 e6 9.c5 Qd8 10.Qb3 Ra7 11.b6 Ra8 12.g4 Bg6 13.h4+=) 8...Qc7 9.b6 Qd8 10.Bd3 (10.Ne2 e5= 11.Ng3 Bg6 12.Bd3 Bd3 13.Qd3+=; 10.Nc3 e5 11.Nge2 Nbd7 12.Ng3 Bg6 13.f4+=) 10...Bd3 11.Qd3 Nbd7 (11...e5 12.Nc3 Qe7 13.Nge2+=) 12.Bb2 (12.Ne2 e6 13.Nbc3+=) 12...e5 13.Nd2 (worse is 13.de5 Nc5 14.Qc2 Nfd7–/+; 13.Ne2=) 13...ed4 (13...Nh5 14.0–0–0=) 14.ed4+= g6 15.Kf2 Be7 16.Ne2 0–0 17.a4 Re8 18.Rhe1 Nc5 19.dc5 Bc5 20.Kf1 Re3 21.Qb1 (21.Qc2 Bb6 22.Nd4 Re1 23.Re1 Qd6=) 21...Qe7 (21...Nd7 22.Nc3+=) 22.Qc1 (22.Bd4 Nd7=) 22...Re8 (22...Nd7!? 23.Bd4 Bd4 24.Nd4 Nb6 25.Re3 Qe3=) 23.Bf6+= Qf6 24.Qc5 Re2 25.Qc1?? (better is 25.Re2 Qa1 26.Kf2 Re2 27.Ke2 Qa4 28.Ke3=) 25...Re1–+ 26.Qe1 Re1 27.Re1 Qd4 (27...Qd4 28.Ke2 Qa4–+) 0–1. Gibbons,Robert (2085) – Koeller,Oliver (2220), Open, Auckland NZL, 2004.

6.a4 Qc7 A) 7.Ba3 A1) 7...e5 8.Bf8 Kf8 9.Nc3 Nbd7 10.Be2 g6 11.0-0 Kg7 12.bc6; A2) 7...Bg4 8.Nc3 (8.h3 Bf3 9.Qf3 Nbd7 10.Nc3 e5 11.bc6 bc6 12.Bf8) 8...Nbd7 9.Be2 e5 10.bc6 bc6 11.Bf8 Nf8 12.0-0; A3) 7...Nbd7 8.bc6 (8.Nc3 e5 9.Bf8 Kf8 10.Rb1 c5 11.b6 Qd8 12.d3) 8...bc6 9.Nc3 e5 10.Bf8 Nf8 11.Be2 Ne6 12.d4; B) 7.Be2 B1) 7...Nbd7 8.Bb2 (8.Nc3 e5 9.0-0 Bb4 10.Bb2 0-0 11.h3 Nc5 12.Na2) 8...e5 9.0-0 Bd6 10.Nc3 0-0 11.Ba3 c5 12.b6; B2) 7...e5 8.0-0 (8.bc6 Nc6 9.Nc3 Bc5 10.Nb5 Qd8 11.Bb2 e4 12.Nfd4) 8...e4 9.Nd4 c5 10.Nb3 Bd6 11.Nc3 Bh2 12.Kh1 Be5; C) 7.Nc3 C1) 7...e5 8.bc6 (8.Be2 Bb4 9.0-0 0-0 10.Bb2 Nbd7 11.h4 Re8 12.Na2) 8...Nc6 9.Nb5 Qb8 10.Be2 Be7 11.0-0 0-0 12.Bb2; C2) 7...Nbd7 8.Be2 (8.Ba3 e5 9.Bf8 Kf8 10.Be2 g6 11.0-0 Kg7 12.bc6) 8...Nc5 9.Rb1 Bg4 10.bc6 bc6 11.h3 Bd7 12.Ba3.

6.a4 Nbd7 A) 7.Nc3 A1) 7...Nc5 8.Ba3 (8.bc6 bc6 9.Ba3 e6 10.Be2 Rb8 11.Rb1 Qc7 12.Rb8) 8...e6 9.bc6 bc6 10.Be2 Ba6 11.0-0 Qc7 12.Nd4; A2) 7...e5 8.Be2 (8.bc6 bc6 9.Rb1 Bb4 10.Be2 0-0 11.0-0 Bb7 12.d4) 8...Bb4 9.0-0 0-0 10.Ba3 d4 11.Nb1 Ne4 12.c3; B) 7.Be2 e5 8.Nc3 (8.0-0 Bb4 9.Bb2 e4 10.Nd4 0-0 11.Na3 Qc7 12.c4) 8...Bb4 9.0-0 0-0 10.Rb1 c5 11.Na2 e4 12.Nh4; C) 7.Ba3 C1) 7...Nc5 8.Nc3 (8.bc6 Na4 9.c4 Nc5 10.cb7 Bb7 11.Nc3 e6 12.Rb1) 8...e6 9.Be2 Qc7 10.bc6 bc6 11.d4 Nce4 12.Ne4; C2) 7...c5 8.Nc3 (8.Be2 e6 9.Nc3 d4 10.Nb1 e5 11.0-0 e4 12.Ne1) 8...e5 9.e4 d4 10.Nd5 Nd5 11.ed5 e4 12.Qe2.

6.a4 e5 7.Ne5 Bd6 (7...Nbd7 8.Nd3 cb5 9.ab5 Bd6 10.Nc3 0-0 11.Be2 Ne5 12.Nf4) 8.Nf3 0-0 9.Ba3 Ba3 10.Na3 Bg4 11.h3 Bf3 12.Qf3.

6.a4 e6 A) 7.Be2 A1) 7...cb5 8.ab5 (8.Bb5 Bd7 9.Nc3 Bb4 10.Bb2 0-0 11.Ne5 d4 12.ed4) 8...Nbd7 9.Nc3 Nc5 10.Bb2 Bd7 11.Ne5 Bd6 12.Na4; A2) 7...Bd6 8.0-0 (8.Nc3 0-0 9.0-0 c5 10.Ba3 d4 11.ed4 cd4 12.Nb1) 8...0-0 9.Nc3 c5 10.d4 Nbd7 11.Ba3 h6 12.h3; A3) 7...Bb4 8.Bb2 (8.Nc3 0-0 9.0-0 Nbd7 10.Bb2 h6 11.Re1 e5 12.Rb1) 8...Nbd7 9.Nc3 0-0 10.0-0 h6 11.h3 e5 12.Rb1; B) 7.Ba3 B1) 7...Ba3 8.Ra3 (8.Na3 0-0 9.Bd3 Nbd7 10.0-0 Nc5 11.Ne5 Nfd7 12.Nf3) 8...Nbd7 9.Nc3 c5 10.Bd3 e5 11.g4 h6 12.Bf5; B2) 7...Bb4 8.Nc3 (8.Bd3 Nbd7 9.Nc3 Nc5 10.0-0 Bd7 11.bc6 Bc6 12.Rb1) 8...Nbd7 9.Be2 0-0 10.0-0 e5 11.bc6 bc6 12.Rb1; C) 7.Na3 C1) 7...Bc5 8.Bd3 (8.Bb2 Nbd7 9.Bd3 0-0 10.0-0 g6 11.h3 Bd6 12.Rb1) 8...Nbd7 9.Bb2 0-0 10.0-0 g6 11.h3 Bd6 12.Rb1; C2) 7...Be7 8.Bb2 (8.Bd3 Nbd7 9.Bb2 Nc5 10.0-0 Nd3 11.cd3 0-0 12.Rb1) 8...Nbd7 9.Bd3 Nc5 10.0-0 0-0 11.Bd4 Qc7 12.Ne5; C3) 7...Nbd7 8.Bb2 (8.bc6 bc6 9.Rb1 Qc7 10.Be2 Bd6 11.0-0 0-0 12.g3) 8...Nc5 9.Rb1 Qc7 10.bc6 bc6 11.c4 Bd6 12.Qc2; D) 7.Nc3 Bb4 8.Be2 0-0 9.0-0 Nbd7 10.Ba3 e5 11.bc6 bc6 12.Rb1.

6.a4 Bg4 7.Nc3 e6 (7...Nbd7 8.h3 Bh5 9.Rb1 Qc7 10.Be2 e5 11.Bb2 Bb4 12.bc6) 8.h3 (8.Be2 Bb4 9.Bb2 Nbd7 10.0-0 0-0 11.h3 Bf3 12.Bf3) 8...Bf3 9.gf3 Bb4 10.Rg1 0-0 11.Bb2 Nbd7 12.Rb1.

6.a4 Bg4 7.h3 Bf3 (7...Bf5 8.Nc3 e6 9.Nd4 Bg6 10.Ba3 c5 11.Nf3 Nbd7 12.Nh4; 7...Bh5 8.Nc3 (8.Be2 Nbd7 9.Nc3 e6 10.0-0 Bb4 11.bc6 bc6 12.Rb1) 8...Nbd7 9.bc6 bc6 10.Rb1 Qc7 11.Be2 e5 12.0-0) 8.Qf3 e5 (8...e6 9.Nc3 Bb4 10.Bb2 Nbd7 11.Qg3 0-0 12.Bd3) 9.Bb2 (9.Qg3 Nbd7 10.Nc3 c5 11.Bb2 d4 12.Nd1) 9...Nbd7 (9...Bd6 10.c4 d4 11.Qg3 0-0 12.ed4) 10.g4 (10.Be2 Bd6 11.0-0 (11.Qg3 0-0 12.Nc3) 11...e4–/+ 12.Qf5; 10.Nc3 Bd6 11.bc6 bc6 12.Rb1) 10...Bd6+= (10...Bb4 11.g5 Ne4 12.Bd3) 11.Be2 (11.g5 Ne4 12.Nc3) 11...0-0 (11...e4 12.Qg2) 12.g5 (12.Nc3+=) 12...Ne4 13.Qf5 Qd8 14.h4 Qe7 15.Nc3 Nec5 16.f3 Rae8 17.Kf2 (17.h5 d4 18.Nd1 Nb6+=) 17...d4–/+ 18.Ne4 de3 (18...Ne4 19.fe4 Bc5 20.Rhf1+=) 19.de3 Ne4 20.Qe4 f5 21.gf6 (21.Qc4 Kh8+=) 21...Nf6–/+ (worse is 21...Qf6 22.bc6 bc6 23.Qc6+=) 22.Qc4 Kh8 23.Rag1 (23.bc6 bc6 24.h5 e4+=) 23...cb5 24.ab5 Bc5 25.Qb3 (25.Rg5!? Rc8 26.Qa4–/+) 25...Rd8–+ 26.Bc1 Ne4 (26...e4 27.f4–+) 27.Kg2 (27.Kf1 Bb4 28.h5 Nc3–/+) 27...Rd6 (27...Nd2 28.Bd2 Rd2 29.Kf1–+) 28.h5 (28.Rh3 Nd2 29.Qc3 Bb4–/+) 28...Nd2 29.Qc3?? (better is 29.Bd2 Rd2 30.Kf2–+) 29...Qg5 (29...Qg5 30.Kf2 Ne4 31.Ke1 Qg1 (31...Nc3?! 32.Rg5 Bb4 33.Rhg1–+) 32.Rg1 Nc3–+) 0–1. Ardaman,Miles (2320) – Anka,Emil (2425), Open Chicago USA, 2006.

6.Bb2 Bg4 7.Nc3 Nbd7 8.h3 Bh5 9.g4 Bg6 10.Nh4 Be4 (10...e5 11.Ng6 hg6 12.Rb1=) 11.Nf3 (11.f3 Bg6+=) 11...h6= 12.Ne4 Ne4 13.Rb1 e6 14.bc6 Qc6 15.Ne5 Ne5 16.Be5 f6?? (better 16...Qc8+=) 17.Bb5+– (17.Bb5 fe5 18.Bc6 bc6 19.f3+–) 1–0. Panza (2635) – Tacchino (2145), ChessWorld.net, 2016.

6.Bb2 Bg4 7.h3 Bf3 8.Qf3 =.

6.Nc3 Qc7 7.d4 Bf5 8.bc6 =.

6.Nc3 Nbd7 =.

5.Bb2 cb5 A) 6.Nf3 e4 (6...d6 7.Nc3 Nf6 8.Bb5 Nc6 9.Rb1 Be7 10.d4 ed4 11.Qd4 Qd4; 6...Nc6 7.Nc3 Nf6 8.Nb5 d6 9.c4 Be7 10.Bd3 0-0 11.0-0 Be6) 7.Ng5 d5 8.Qh5 Qg6 9.Qg6 hg6 10.Nc3 Nf6 11.Nb5 Na6; B) 6.Nc3 Nf6 (6...Nc6 7.Nd5 Qd8 8.Bb5 Nf6 9.Nf6 gf6 10.Ne2 Qb6 11.a4 Na7) 7.Nf3 Nc6 8.Nb5 d6 9.c4 Be7 10.Bd3 0-0 11.Qc2 Bg4.

5.Bb2 d5 6.Be5 Nd7 7.Bf4 Ngf6 8.Nc3 Bc5 9.bc6 bc6 10.d4 Be7 11.Rb1 Qd8.

5.Bb2 e4 A) 6.Nc3 d5 (6...Nf6 7.Na4 Qd8 8.Bf6 gf6 9.Ne2 cb5 10.Nac3 Nc6 11.Nb5 Bc5) 7.Nge2 Nf6 8.Na4 Qc7 9.b6 Qd8 10.c4 Nbd7 11.Nf4 dc4; B) 6.Qg4 Ne7 7.Qe4 d5 8.Qf4 Ng6 9.Qg3 Qd8 10.f4 Bc5 11.Bg7 Rg8.

5.Nc3 cb5 A) 6.Bb5 Nf6 (6...Nc6 7.Rb1 Nf6 8.Nf3 Bd6 9.Bd3 Qd8 10.Bb2 0-0 11.g4 Ng4) 7.Nf3 e4 8.Ne5 Be7 9.Nc4 Qe6 10.Na4 Nd5 11.Bb2 0-0; B) 6.Nf3 Nf6 (6...Nc6 7.Nb5 Nf6 8.Rb1 Qd8 9.Bb2 e4 10.Ng5 d5 11.c4 h6) 7.Nb5 d6 8.a4 Be7 9.Ba3 Be6 10.Qb1 Qd8 11.Ng5 Nc6; C) 6.Rb1 b4 7.ab4 ab4 8.Nd5 Qd6 9.Nb4 Qb6 10.c3 Nc6 11.Bb2 Nf6; D) 6.Bb2 Nf6 (6...Nc6 7.Nd5 Qd8 8.Bb5 Nf6 9.Nf6 gf6 10.Nf3 Qb6 11.a4 Na7) 7.Nf3 Nc6 8.Nb5 d6 9.c4 Be7 10.Bd3 0-0 11.0-0 Be6; E) 6.Nb5 d6 (6...Nf6 7.Nf3 d6 8.a4 Bf5 9.Ba3 Nbd7 10.Rb1 Qc6 11.Bd3 Be6; 6...Nc6 7.Rb1 Qd8 8.Bb2 Nf6 9.Nf3 e4 10.Nfd4 Bc5 11.Nb3 Be7; 6...e4 7.Qh5 Nf6 8.Qe5 Kd8 9.Qf4 d6 10.Bb2 Be7 11.Nh3 Bh3; 6...Be7 7.Nf3 d6 8.d4 e4 9.Nd2 Nf6 10.Nc4 Qd8 11.Be2 d5) 7.Nf3 Nf6 8.a4 Nc6 9.Ba3 d5 10.Rb1 Qd8 11.Bb2 Bd6.

5.Nc3 d5 6.Rb1 Qd8 7.Nf3 e4 8.bc6 =.

5.Nc3 d5 6.bc6 bc6 7.Rb1 Qc7 8.d4 =.

5.Nc3 d5 6.d4 e4 7.Na4 Qc7 8.b6 =.

5.Nc3 d5 6.Nf3 e4 7.Nd4 c5 8.Na4 =.

5.d4 e4 6.c4 d5 7.Nc3 Nf6 8.bc6 Qc6 9.c5 Bg4 10.Qc2 Qd7 11.h3 Be6.

5.d4 e4 6.c4 Nf6 7.Nc3 d5 8.bc6 Qc6 9.c5 Bg4 10.Qc2 Qd7 11.h3 Be6.

5.d4 e4 6.Nd2 Nf6 7.Rb1 Qc7 8.c4 =.

5.Nf3 cb5 6.Nc3 Nf6 (6...Nc6 7.Nb5 e4 8.Rb1 Qd8 9.Nfd4 Nf6 10.Bb2 Bc5 11.Nb3 Be7) 7.Nb5 d6 8.a4 Be7 9.Ba3 Na6 10.Qb1 Qd8 11.Bc4 0-0.

5.Nf3 d6 A) 6.d4 Nf6 (6...e4 7.Ng5 Nf6 8.Nc3 d5 9.Rb1 Qd8 10.Qd2 Bd6 11.Nh3 0-0; 6...Bg4 7.Nbd2 cb5 8.Rb1 b4 9.ab4 Nc6 10.ba5 Qa5 11.Rb7 Nge7; 6...ed4 7.Nd4 c5 8.Nf3 Nf6 9.Nc3 Be7 10.Bc4 0-0 11.0-0 Nbd7; 6...Nd7 7.Nc3 Ngf6 8.bc6 bc6 9.Bd3 Qc7 10.Bb2 Rb8 11.Rb1 Be7; 6...Bf5 7.Nbd2 Nd7 8.Nc4 Qc7 9.bc6 Qc6 10.de5 de5 11.Bb2 f6) 7.Nc3 Bg4 8.h3 Bf3 9.Qf3 Nbd7 10.Na4 Qc7 11.Be2 Be7; B) 6.Be2 Nf6 (6...cb5 7.Nc3 Nf6 8.Nb5 Be7 9.a4 0-0 10.Ba3 Nbd7 11.0-0 Nc5; 6...Be7 7.Nc3 Nf6 8.d4 e4 9.Ng5 d5 10.bc6 Nc6 11.Rb1 Qd8) 7.Nc3 cb5 8.Bb5 Nc6 9.0-0 Be7 10.d4 e4 11.d5 0-0; C) 6.Bb2 cb5 (6...Nf6 7.Nc3 Be7 8.Bd3 cb5 9.Nb5 Na6 10.0-0 e4 11.Nd6 Qd6; 6...Bf5 7.Nc3 Nf6 8.Na4 Qc7 9.Nh4 Be6 10.Bd3 Nbd7 11.bc6 Qc6; 6...Nd7 7.Nc3 Ngf6 8.Rb1 Be7 9.bc6 bc6 10.Be2 0-0 11.0-0 Rb8; 6...Be6 7.Nc3 Nf6 8.Ng5 Nbd7 9.Ne6 fe6 10.bc6 Qc6 11.f3 Be7; 6...Be7 7.Nc3 Nf6 8.Na4 Qd8 9.Bd3 0-0 10.0-0 e4 11.Bf6 Bf6) 7.Nc3 Nf6 8.Bb5 Nc6 9.Qe2 Be7 10.0-0 0-0 11.a4 Na7; D) 6.Nc3 Nf6 7.Rb1 Qc7 8.Be2 Be7 9.b6 Qd8 10.0-0 Nbd7 11.e4 c5.

5.Nf3 Nf6 A) 6.Nc3 e4 (6...d5 7.Ne5 Bd6 8.f4 Nbd7 9.d4 0-0 10.bc6 bc6 11.Rb1 Qc7) 7.Ne5 d5 8.Rb1 Qc7 9.f4 Nbd7 10.bc6 bc6 11.d4 ed3; B) 6.Ne5 cb5 7.Nc3 Nc6 8.Ng4 Be7 9.Bb2 Qd8 10.Nb5 0-0 11.Bd3 d6.

6.a4 Nf6 (6...Be6 7.Na3 Nd7 8.Nf3 Ngf6 9.Rb1 Qc5 10.d4 Qb4 11.c3 Qb3; 6...Bf5 7.Na3 Qc5 8.Nc4 cb5 9.ab5 Nd7 10.Qf3 e4 11.Qf4 a4; 6...Nd7 7.Na3 d5 8.Rb1 Ngf6 9.Nf3 Qc5 10.bc6 bc6 11.Be2 Bd6; 6...cb5 7.Bb5 Nc6 8.Nf3 Nf6 9.Na3 Be7 10.Nc4 Qc7 11.d4 e4; 6...Be7 7.Na3 Nf6 8.Nc4 Qc7 9.Nf3 0-0 10.Be2 Bf5 11.0-0 cb5) 7.c4 (7.Na3 Be6 8.Nf3 Nbd7 9.Rb1 Qc5 10.bc6 bc6 11.d4 Qb4) 7...Be7 (7...Na6 8.f4 Nb4 9.fe5 de5 10.Be5 Ng4 11.Bf4 Bf5) 8.Nf3 Bg4 (8...Na6 9.Nc3 Nb4 10.Qb1= (10.Be2 Bf5 11.0-0 0-0) 10...0-0 11.Bd3 g6; 8...0-0 9.Nc3 Bf5 10.d4 e4 11.Qb1 d5) 9.Be2 (9.h3 Bf3 (9...Bf5 10.Nc3 Nbd7 11.Be2 0-0) 10.Qf3 (10.gf3 Na6 11.ba6 Qb2) 10...Na6= 11.Nc3 Nb4) 9...Nbd7 (9...0-0 10.Nc3 Nbd7 11.0-0 h6) 10.d4 (10.Nc3 0-0 11.0-0 h6) 10...Qc7 (10...ed4 11.Qd4 Qd4) 11.Nc3 0-0 12.0-0 Rfe8 13.Qc2 Bf8 14.h3 'White threatens to win material: h3xg4' 14...Bh5 15.Rfe1 Rac8 16.Rac1 h6 'Prevents intrusion on g5' 17.Nd2 ed4 18.ed4 Be2 19.Ne2 (19.Re2 Re2 20.Ne2 cb5 21.ab5 g6=) 19...cb5 20.ab5 b6 21.Qb3 'Black has a cramped position' (21.Qd3 d5=) 21...Ne4 'Black threatens to win material: Ne4xd2' (21...d5 22.Qa2+=) 22.Nf3 Nef6 (22...g6 23.Nf4=) 23.d5 'White has a new backward pawn: c4. Black has a cramped position' 23...Re4 (23...g6 24.Nfd4+=) 24.Ned4 (24.Nfd4 Rce8+=) 24...Re1 '=' 25.Ne1 Nc5 'Black threatens to win material: Nc5xb3. The knight feels good on c5' 26.Qc2 Re8 27.Nf5 (27.Nd3 Nfe4=) 27...Qd8 28.Nf3 Re4 (28...g6 29.N5d4 Bg7 30.Nc6=) 29.N3d4 Nfd7 30.f3 'White threatens to win material: f3xe4' 30...Re8 31.h4 g6 'Black threatens to win material: g6xf5' 32.Nc6 'White threatens to win material: Nc6xd8. The white knight is well posted.' 32...Qc7 (32...Qc8 33.Ng3=) 33.Ng3 Bg7 34.Bg7 Kg7 'Black king safety dropped' 35.Qc3 Nf6 '?' (35...Kh7!?=) 36.Ne4 (better is 36.Rf1+/–) 36...Re4 '?' (better is 36...Nce4 is the best option Black has 37.fe4 Re4+=) 37.fe4 '+–' 37...Nce4 38.Qf3 (38.Qe3!? Nc5 39.Rf1 Nfe4+–) 38...Qd7 (38...Qc8 39.Re1 Nc5 40.Rf1+/–) 39.Re1 Nc5 40.Re7 Qg4 41.Qg4 Ng4 42.Re8 Nf6 (42...h5 43.Kf1+/–) 43.Ra8 (43.Re2 a4 44.Na7 Nfe4+/–) 43...Nfe4 44.Rb8 Na4 (better is 44...Nd2 45.Rb6 Nc4+/–) 45.Na5 '??' 'there were better ways to keep up the pressure' (better is 45.Ne7 a pity that White didn't try this 45...Nd2 46.c5 Nc5 47.Nc8+–) 45...ba5 '=' 46.b6 'A strong pawn' 46...Nac5 (better is 46...Kf6!?= and Black can hope to live) 47.b7 '+/–' 47...Nf6 '??' 'the position is going down the drain' (better is 47...Nd7 48.Re8 Nec5+/–) 48.Rg8 '+–!!' 'Double attack: d6/g8' 48...Ng8 (48...Kg8 49.b8Q Promotion Double attack) 49.b8Q 'Promotion' 49...Nf6 50.Qd6 Nfd7 51.Qc7 a4 52.Qa7 (52.Qd8 might be the shorter path 52...Nf6+–) 52...h5 (52...Kf6 does not win a prize 53.Qa8 Kg7 54.d6+–) 53.Kf2 Kf6 (53...f6 doesn't do any good 54.Qc7+–) 54.Ke3 Ke5 (54...Ke7 is not the saving move 55.Kd4+–) 55.Qc7 Kf6 56.Kd4 1–0. Miralles,Gilles (2260) – Kappler,Jean Marie (2200), FRA–ch, 1982.

6.Nc3 Bd7 7.d4 ed4 8.Na4 Qd8 9.Bd4 Nf6 10.Nf3 c5 11.Bc3 Be7.

6.Nc3 Nd7 7.Nf3 Ngf6 8.bc6 bc6 9.Rb1 Be7 10.d4 0-0 11.Bd3 Rb8.

6.Nc3 Be6 7.Nf3 Nf6 8.Ng5 Nbd7 9.bc6 Qc6 10.Ne6 fe6 11.f3 Be7.

6.Nc3 Bf5 7.Nge2 Nf6 8.Ng3 Bd7 9.Bd3 cb5 10.0-0 Na6 11.Nge4 Ne4.

6.Nc3 Nf6 7.bc6 Nc6 8.Rb1 =.

6.Nc3 Nf6 7.Nf3 Bf5 8.Bc4 cb5 9.Nb5 Nc6 10.0-0 Be7 11.a4 0-0.

6.d4 cb5 (6...Nf6 7.Nc3 Nbd7 8.Nf3 Be7 9.bc6 bc6 10.Rb1 0-0 11.Bd3 Rb8; 6...Nd7 7.Nc3 Ngf6 8.Nf3 Be7 9.Bd3 0-0 10.0-0 e4 11.Ne4 Ne4; 6...Be6 7.Nf3 Nd7 8.Nc3 Ngf6 9.bc6 bc6 10.Rb1 h6 11.de5 de5; 6...e4 7.Nc3 Nf6 8.Nge2 Be7 9.Ng3 d5 10.Na4 Qc7 11.c4 Be6) 7.Nc3 Nf6 8.Nb5 (8.Bb5 Bd7 9.Qe2 ed4 10.ed4 Be7 11.Nf3 0-0) 8...e4+= (8...Nc6 9.Nf3 e4 10.Nd2 Bg4 11.Be2 d5) 9.Nh3 Be7 10.Nf4 0-0 11.a4 Na6.

6.Nf3 Bd7 7.c4 Nf6 8.Nc3 Be7 9.Bd3 cb5 10.cb5 0-0 11.0-0 Rc8.

6.Nf3 Nd7 7.Nc3 Ngf6 8.Be2 Be7 9.bc6 bc6 10.Rb1 0-0 11.0-0 Rb8.

6.Nf3 e4 7.Ng5 d5 8.Qh5 =.

6.Nf3 Be6 7.Nc3 Nf6 8.Bd3 Nbd7 9.bc6 bc6 10.Rb1 Nc5 11.Be2 Be7.

6.Nf3 Be7 7.Nc3 Nf6 8.Na4 Qd8 9.Bd3 0-0 10.0-0 e4 11.Bf6 Bf6.

6.Nf3 Bf5 7.Nc3 Nf6 8.Be2 cb5 9.Nb5 Be7 10.c4 Nc6 11.Nh4 Bd7.

6.Nf3 Nf6 7.Nc3 Bf5 8.Na4 Qc7 9.Bd3 Bd3 10.cd3 cb5 11.Nc3 Qc6.

6.Na4 Qc7 (6...Qd8 7.Nf3 d6 8.Bc4 Be7 9.Bb2 0-0 10.0-0 cb5 11.Bb5 Nc6) 7.Nf3 d6 8.Bb2 Nbd7 9.Be2 Be7 10.0-0 0-0 11.h3 Nb6.

6.Rb1 cb5 7.Nb5 Be7 8.Nf3 d6 9.a4 0-0 10.Ba3 Qd8 11.Be2 Nc6.

6.Rb1 Qc7 7.e4 d5 8.bc6 =.

6.Rb1 Bd6 7.Nf3 0-0 8.Bb2 Re8 9.Bc4 Qc5 10.Qe2 e4 11.Nd4 Bc7.

6.Bb2 cb5 (6...d5 7.Nf3 Nbd7 8.Na4 Qc7 9.b6 Qd6 10.Be2 Be7 11.0-0 0-0; 6...d6 7.Nf3 Nbd7 8.d4 Be7 9.bc6 bc6 10.Rb1 0-0 11.Bd3 Rb8; 6...Qc7 7.Nf3 d5 8.h4 Bd6 9.Be2 0-0 10.bc6 Nc6 11.Nb5 Qe7; 6...e4 7.Nge2 d5 8.Nf4 Bd6 9.Na4 Qc7 10.b6 Qd8 11.Be2 Nbd7) 7.Nf3 Nc6 8.Nb5 d6 9.c4 Be7 10.Bd3 0-0 11.Qc2 Bg4.

6.Nf3 d5 (6...cb5 7.Nb5 d6 8.c4 Be7 9.Qc2 Nc6 10.Rb1 0-0 11.Nd6 Nb4; 6...d6 7.Rb1 cb5 8.Bb5 Nc6 9.d4 ed4 10.ed4 d5 11.Ne5 Qc7; 6...e4 7.Na4 Qd8 8.Nd4 Be7 9.Nf5 0-0 10.Nb6 Qb6 11.Ne7 Kh8 12.a4) 7.Rb1 Qc7 8.b6 Qd6 9.Be2 Be7 10.0-0 0-0 11.h3 h6.

6.Qd4 Qd4 7.ed4 d5+= 8.Nc3 Nf6 9.Bf4 Bf5 10.Bd3 Bd3 11.cd3 Be7.

6.Qd4 Qd4 7.ed4 Nf6 8.Nf3 =.

6.ed4 cb5 (6...Nf6 7.Nc3 d5 8.Nf3 Bd6 9.Bd3 0-0 10.0-0 a4 11.h3 Re8; 6...Be7 7.Nc3 Nf6 8.Nf3 0-0 9.Bd3 cb5 10.0-0 d5 11.Nb5 Nc6; 6...d5 7.Nf3 Bg4 8.Nc3 Nf6 9.Na4 Qc7 10.b6 Qc8 11.Bd3 Bd6) 7.Nf3 Nf6 8.Qe2 Be7 9.Nc3 Nc6 10.Qb5 Qb5 11.Nb5 0-0.

6.Ne2 de3 7.Be3 Qb5 8.Nbc3 Qh5 9.Qd4 d6 10.Nf4 Qe5 11.Be2 Qd4.

6.Nf3 de3 (6...cb5 7.Nd4 Nc6 8.Nb5 Nf6 9.N1c3 d5 10.Rb1 Qd8 11.Nd5 Nd5; 6...Nf6 7.Nd4 d5 8.Nc3 Bd6 9.Bd3 0-0 10.0-0 Qc7 11.h3 c5) 7.Be3 Bc5 8.Nd4 Nf6 9.Nc3 a4 10.Be2 0-0 11.0-0 Re8.

6.Nd4 Nf6 (6...d5 7.Nc3 Nf6 8.Na4 Qd8 9.c4 cb5 10.Nb5 Nc6 11.c5 Be6; 6...c5 7.Ne2 Nf6 8.Bb2 Be7 9.Nf4 d6 10.Nc3 0-0 11.Nfd5 Qd8; 6...cb5 7.Nb5 Be7 8.Bb2 Nf6 9.Bd4 Qd8 10.N1c3 0-0 11.Bf6 Bf6) 7.Nc3 cb5 8.Bb5 Nc6 9.Rb1 Qc7 10.f3 Bc5 11.Nb3 ef3.

6.Ne5 Qc7 7.f4 Nh6 8.bc6 =.

6.Ng1 d5 7.Bb2 Be6 8.Be2 =.

6.Ng5 d5 7.Bb2 Nf6 8.f3 +=.

6.Ng5 d5 7.Qh5 g6 8.Qh4 Bg7 9.Nc3 h6 10.Nh3 Ne7 11.Na4 Qc7.

6.Ng5 Nf6 7.Nc3 d5 8.Rb1 Qc7 9.h4 h6 10.Nh3 Bd6 11.bc6 bc6.

6.Nh4 d5 (6...Qd8 7.Qh5 Nf6 8.Qe5 Qe7 9.Qc7 Qd8 10.Qd8 Kd8 11.Bb2 d5; 6...d6 7.Bb2 Qd8 8.g3 Nf6 9.Nc3 d5 10.Na4 Bd6 11.Bf6 gf6) 7.Bb2 Qd8 8.g3 Nf6 9.Nc3 Bd6 10.Be2 0-0 11.0-0 Bh3.

5.Bb2 cb5 6.Bd4+= Qd8 7.Nc3 Nc6 8.Bf6 (8.Bb5? e5 (8...Nd4?! 9.ed4 e6 10.Nf3=) 9.Be5 Ne5–+; 8.Nb5?! Nd4 9.Nd4 e5+=) 8...gf6 9.Nb5 d5 (9...Rg8 10.c4+=) 10.Nf3 (10.Qf3 d4+=) 10...Bf5 (10...e5 11.d4=) 11.c4+= Rc8 12.Nbd4 Bg4 13.cd5 (13.Nc6 bc6 14.d4 e5+=) 13...Qd5 14.Be2 (better is 14.Nc6!? Qc6 15.Rb1 Bf3 16.gf3+=) 14...Nd4+= 15.Qa4 b5 16.Qd4 Qd4 (16...Bf3 17.Bf3 Qd4 18.ed4+=) 17.Nd4= Be2 18.Ke2 b4 19.ab4 ab4 20.Rhc1 Rc1 21.Rc1 e5 (21...Kd7 22.Nb3 e5 23.d4=) 22.Nb3 (22.Nf5 Kd7+=) 22...Kd7 23.Ra1 Bd6 24.Ra7 Ke6 25.e4 Rc8 26.Kd3 Rc7 (26...Rd8 27.Ke3=) 27.Rc7+= Bc7 28.Kc4 f5 (28...Bd6 29.g4+=) 29.f3 (29.Nc5 Kf6 30.d3 Ba5+/–) 29...fe4 (29...Bd6 30.Na1+=) 30.fe4 (30.Nc5 Kd6 31.Ne4 Ke6 32.Kb4 h6+/–) 30...f5 (30...Bd6 31.Na1+=) 31.d3 (31.Nc5 Kf6+/–) 31...f4 (31...Bd6!?+=) 32.Kb4+/– Kd6 33.Nd2 Kc6 (33...Bd8 34.Kc3+/–) 34.Nf3 Kd6 35.Kc4 Bb6 36.d4 ed4 37.Kd3 (37.Nd4?! Ke5 38.Nf3 Ke4 39.Ng5 Ke3 40.Nh7 Kf2=) 37...Ke6 (37...h5 38.Nd4 Bd8 39.g3 fg3 40.hg3+/–) 38.Nd4 (better is 38.Ng5!? Ke5 39.Nh7+–) 38...Ke5 39.Nf3 Kd6 40.Nd2 (40.Kc4 h5+/–) 40...Bg1 41.Nf3 (41.h4 h5+/–) 41...Bb6 42.Ng5 h5 43.Ke2 (43.Nf3 Ke6+/–) 43...Ke5 44.Kf3 Bc5? (better is 44...Ba5+/–) 45.Nh3+– Be3 46.g3 fg3 47.Ke3 h4 (47...gh2 48.Nf2 Ke6+–) 48.hg3 hg3 49.Ng1 (49.Nf4 Kd6+–) 49...g2 (49...Kd6 50.Kf4+–) 50.Nf3 Ke6 51.Kf2 1–0. Bernhard,Alfred – Liedtke,Andreas, Ruhrgebiet VK1, 1998.

5.Bb2 d5 6.Nf3 =.

5.Nc3 a4 6.Nf3 d5 7.d4 (7.Be2 c5+=) 7...Bg4 8.Rb1 (8.h3!? Bh5 9.g4+=) 8...c5= 9.Be2 e6 10.0-0 Nbd7 11.Bb2 Bd6 (11...cd4 12.ed4 Bd6 13.h3+=) 12.Ne5 (12.h3 Bh5+=) 12...Be2+= (worse is 12...Be5 13.de5 Be2 14.Qe2 Ne5 15.Nd5 ed5 16.Be5=) 13.Nd7 (13.Ne2!? c4 14.f4+=) 13...Bh2!–/+ (13...Bd1? 14.Nb6 Bc2 15.Rbc1+–; 13...Nd7?! 14.Ne2 0-0 15.dc5 Qc5 16.Qd4 Qd4 17.Nd4–/+ (17.ed4? Rfc8–+)) 14.Kh1 (14.Kh2 Ng4 (14...Bd1) 14...Nd7 (14...Kd7 15.Qe2 Bd6 16.Rfd1–/+) 15.Qe2 (15.Ne2 Bd6 16.dc5 Qc5 (worse is 16...Bc5 17.Bg7 Rg8 18.Bd4=) 17.Bg7 Qc4–/+) 15...Bc7 16.Qg4 (16.dc5 Qc5 17.Qg4 Rg8–/+) 16...Rg8 (16...cd4 17.Ne2 de3 18.Qg7–+) 17.g3 (17.Rfd1!?–/+) 17...cd4–+ 18.ed4 Nf6 19.Qd1 Ke7 20.Kg2 Rgc8 21.Qd3 Bd6 22.Rbe1 (22.Nd1 Kf8–+) 22...Kf8 23.Rh1 Kg8 24.Rh4 Bf8 (24...Rc4!? 25.Rb1–+) 25.Reh1 g6 26.g4 Bg7 27.Ne2 (27.g5 Nh5–+) 27...Qc7 (27...g5 28.R4h3 h6 29.Bc1–+) 28.c3 (28.Nc3 h6–+) 28...Qc4 29.Qc4 Rc4 30.g5 Ne4 31.f4? (31.Rh7 Ng5 32.R7h4–+) 31...Ra5 32.Rh7 (32.Ra1 Rb5 33.Ra2 f6–+) 32...Rb5 33.Bc1 (33.Ba1–+) 33...Nc3 34.f5 (34.Kf3 Rb3–+) 34...ef5 (34...Ne2 35.f6 Nf4 36.Bf4 Rb2 37.Kf3 Rc3 38.Be3 Re3 39.Ke3 Rh2 40.R1h2 Bf6 41.gf6 e5 42.Rh8) 35.Bf4 (35.Kf3 Rb3 36.Be3–+) 35...Rb2 (35...Ne2!? 36.Rg7 Kg7 37.Be5 Kf8 38.Rh8 Ke7 39.Bf6 Kd7 40.Rd8 Kc7 41.Re8–+) 36.Be5 Re2 (36...Ne2?? 37.Rh8 Bh8 38.Rh8) 37.Kf3 Re5 38.de5 Be5 0–1. Jaramillo,Carlos Orlando (1915) – Condori,Edwin (2155), Dosquebradas COL, 1st Open, 2013.

5.Nc3 Qc7 6.Nf3 (6.d4 d5 7.Bd3 Nbd7 8.Nf3=; 6.f4 d5 7.Nf3 Bg4 8.h3=) 6...d5 7.d4 Bg4 8.Bd3 =.

5.Nc3 d5 6.Nf3 Qc7 7.d4 Bf5 8.bc6 =.

5.Nc3 e5 6.Nf3 (6.Rb1 Qd8 7.Nf3 e4 8.bc6=) 6...e4 7.Nd4 d5 8.bc6 =.

5.c4 cb5 6.cb5 d5 7.Bb2 Bf5 8.Nc3 e6 9.Nf3 Nbd7 10.d4 (10.Nh4 Bg6=) 10...Bd6 11.Bd3 Bd3 12.Qd3 0-0 13.0-0 Rfc8 14.Rfc1 Qd8 15.Na4 Ne4 16.Ne5 (better is 16.Nc3!? Nc3 17.Rc3 Rc3 18.Bc3+=) 16...Be5–/+ 17.de5 Nf2! 18.Kf2 Qh4 19.Kg1 Qa4 20.Bd4 Rc4 21.Rc4 Qc4 22.Qc4 dc4 23.Rc1 Rc8 24.a4 ½–½. Champion,William R (1840) – Carter,Maurice H (1625), corr S70101 ICCF, 2007.

5.c4 cb5 6.cb5 e5 7.Qc2 =.

5.c4 e5 6.Bb2 d6 7.Nf3 Be7 8.Nc3 Bg4 9.d4 Nbd7 10.Be2 Qc7 (10...0-0 11.0-0=) 11.0-0+= 0-0 12.Rc1 Rad8 13.bc6 (13.h3 Bh5+=) 13...bc6= 14.d5 (14.h3 Bh5=) 14...Rb8 15.dc6 (15.Ba1 Nb6=) 15...Rb2=+ 16.cd7 Qd7 17.Rb1 Rfb8 18.Rb2 (18.Qd2 Rb1 19.Rb1 Rb1 20.Nb1 Qb7=) 18...Rb2 19.Qa1 Qb7 20.Rb1 Rb1 21.Qb1 Qb1 22.Nb1 d5 23.cd5 Nd5 24.Kf1 Bf5 25.Nfd2 (25.Nbd2 Be6= (worse 25...Ba3 26.e4+–)) 25...Nb6 26.e4 Be6 27.Bb5 h5 28.Ke2 g5 29.a4 Bb4 30.Kd3 Bc5 31.f3 g4 32.Nc3 Bg1 (32...Kg7 33.Bc6=) 33.fg4 hg4 (worse 33...Bg4 34.h3 Bc8 35.Nf3+–) 34.Ne2 Bf2 (worse 34...Bh2 35.g3+=) 35.Nc3 Kf8 36.Nc4 (36.Bc4 Ke7=) 36...Nc4=+ 37.Bc4 Bd7 (37...Bc8 38.Nd5=+) 38.Bb5= Bc8 39.Ke2 (39.Nb1 f5=) 39...Bg1=+ 40.g3 (40.Nd5 Bh2 41.Ne3 Ke7=+) 40...Ke7 (40...f5 41.ef5 Bf5 42.Nd1=+) 41.Kf1 Bd4 (41...Bh2? 42.Kg2+–) 42.Ne2 (42.Nd5 Kf8=+) 42...Bb2 43.Kf2 Kd6 44.Ke3 Kc5 45.Kd3 Kb4 (45...f5 46.Kc2 Bd4 47.Kd3–/+) 46.Kc2 Ba3 47.Nc3 Kc5 48.Kd3 (48.Bd3 Bd7–/+) 48...Be6 (48...f5!?–/+) 49.Nd1 Bc1 (49...f6 50.Ne3=+) 50.Kc3= f5 51.ef5 Bf5 52.Be2 e4 53.Nf2 Attacking the isolated pawn on g4 53...Be3 54.Ng4 (54.Bg4 Bd4 55.Kd2 Bg4 56.Ng4 Kb4=) 54...Bd4 55.Kd2 Bd7 56.Bd1 Bg1 (56...Kb4!? 57.Ne3 Ba4 58.Ba4 Ka4=) 57.h4+= Kd4 Black intends e3 58.Nf6 (58.Ke1 e3+=) 58...Bc8 59.g4 (59.Ke1!?+=) 59...e3=+ 60.Ke2 (60.Kc1!? Ba6 61.g5=+) 60...Bf2–/+ 61.g5? (better 61.Kf1 Bh4 62.Nh5–/+) 61...Bh4–+ 62.Nh7?? (62.Kf3 Bg5 63.Nh5–+) 62...Bg4 63.Kf1 Bd1 (63...Bd1 64.Kg2 e2 65.Kh2 e1Q 66.Nf6 Qf2 67.Kh3 Qg3) 0–1. Logvinov,Kirill (2015) – Potapov,Alexey (2385), Kaluga RUS, CFO Team Ch, 2012.

5.c4 g6 6.Bb2 Bg7 7.Nc3 d6 8.Nf3 0-0 9.Be2 Qc7 10.0-0 Nbd7 11.d4 e5 12.Qc2 Re8 13.Rac1 c5 14.Rfd1 cd4 15.ed4 ed4 16.Nd4 Nc5 17.Bf3 Be6 18.Ne6 fe6 19.Re1 Nfd7 20.Nd1 Bb2 21.Nb2 (21.Qb2? Nd3 22.Qd2 Nc1 23.Qc1 Ne5–+) 21...Ne5 22.Be2 Rf8 23.h3 Qb6 24.Bf1 Rf4 25.Rcd1 Raf8 26.Rd2 Nb3?? (better is 26...Kg7+=) 27.Na4+/– Nd2 28.Nb6 Ndf3 29.gf3 Nf3 30.Kh1 Ne1 (30...Ne1 31.Qe2 Rf2 32.Qe6 Kg7+–) 0–1. Chirpii,Alexandru (2005) – Mischuk,Dmitry (2205), Ilichevsk Sunnny Pawn op, 2008.

5.c4 g6 6.Bb2 Bg7 7.Nf3 0-0 8.Be2 (8.d4 d6=) 8...d6 (8...d5 9.cd5 cd5 10.Bd4=) 9.0-0 e5 10.d4 e4 11.Nfd2 cb5 12.cb5 d5 13.Nc3 Be6 14.Na4 Qd6 15.Nc5 b6 (15...Bc8 16.a4+=) 16.Ne6 Qe6 17.Rc1 Ra7 18.Rc3 (18.Qc2 Re7+=) 18...Re8 (18...Rc8 19.Qc2 Rc3 20.Qc3+=) 19.Qc2+/– Bf8 20.Rc1 Bd6 21.Nb1 (21.Qa4 Qf5+=) 21...Ree7 22.a4 Rec7 23.Qb3 Rc3 24.Rc3 Rc7 ½–½. Borkowski,A – Pedersen,Carl, Frome op, 1998.

5.Nf3 cb5 6.Bb2 =.

5.Nf3 cb5 6.Nc3 b4 7.ab4 Qb4 8.Be2 (8.Nb5 Qc5=) 8...d5 9.Nb5 Qc5 10.Ba3 Qb6 11.0-0 Qd8 (11...Bg4 12.Ne5 Be2 13.Qe2=) 12.c4 (12.Bb2 Nc6=) 12...Nc6 13.cd5 Nd5 14.d4 g6 (14...Bf5 15.Qb3 Rc8 16.Rfc1=) 15.e4+= Nf4 16.Bc4 f6 17.d5 Nb8 (17...Na7 18.Qb3 Nb5 19.Bb5 Kf7 20.Rfd1+=) 18.e5 White prepares d6 18...fe5 (18...Bg7!?+/–) 19.Ne5+– Bg7 (19...Qb6+–) 20.Re1 0-0 (20...Na6 21.Qa4 Be5 22.Re5+–) 21.Be7! Qe7 (21...Qb6 22.d6 Be6 23.Be6 (< 23.Bf8 Bc4 24.Bg7 Qb5 25.Nc4 Qc4+–) 23...Ne6 24.Bf8 Qb5 25.Bg7 Kg7 26.Ng4+–) 22.d6 Qe6 1–0. Crawford,Gary (2085) – Piech,Jacek, TE.2004.P.01706, 2004.

5.Nf3 d5 6.Nc3 Qc7 7.a4 (7.bc6 Nc6 (7...Qc6?? 8.Bb5+–) 8.Nb5 Qb8+=) 7...e6 (7...e5 8.b6 Qb6 9.Ne5=) 8.Rb1 (8.Be2 e5=) 8...Nbd7 9.Be2 (9.Bb2 Bd6=) 9...Bd6 10.0-0 (10.Bb2 0-0=) 10...0-0 11.d4 e5 12.b6 Qd8 13.de5 Ne5 14.Bb2 (14.Ne5 Be5 15.Bb2 Nd7=+) 14...Qe7 (14...Nf3 15.Bf3 Ra6 16.e4 de4 17.Ne4 Ne4 18.Be4 Bh2 19.Kh2 Qh4 20.Kg1 Qe4 21.Qd4 Qd4 22.Bd4=+) 15.Qd4 (15.Nd4 Re8=+) 15...Re8 (15...Nf3 16.Bf3 Bc5 17.Qf4=+) 16.Ne5 Be5 17.Qh4? (17.Qd2 Qb4=+) 17...Bf5 (better is 17...Qc5 18.Nd1 Qc2 19.Be5 Qb1 (19...Qe2?! 20.Bf6 gf6 21.Qf6=) 20.Bf6 gf6 21.Qf6 Qg6–/+) 18.Bd3 Qe6 (18...Bd3 19.cd3 Ra6 20.Ne2 Rb6 21.Be5 Rb1 22.Rb1 Qe5 23.Qd4=+) 19.Ne2 Ne4 (19...Bd3 20.cd3 Qg4 21.Qg4 Ng4 22.h3 Bb2 23.Rb2=) 20.Nf4 Qd7 21.Be4= Be4 22.Nd3 Bd3 23.cd3= Bb2 24.Rb2 Qd6 25.Rb3 Ra6 26.h3 h6 27.Rc1 c5 28.Rb5 Rc8 29.d4 c4= 30.Qg4 Rd8 31.Rcb1 (31.e4 A) < 31...Rb6 32.Rd5 Qe7 33.Rd8 (33.Rc4?! Rd5 34.ed5 Qe1 35.Kh2 Qf2=) 33...Qd8 34.Rc4+/–; B) 31...Qa3 32.Qd1 de4 33.Rc4 Qd3 34.Qd3 ed3+/–). Touzane – Cesbron, CEIT 1hKO, 1997.

5.Nf3 d5 6.c4 Bg4 7.Bb2 Nbd7 8.Nc3 e6 9.d4 dc4 10.Bc4 c5 11.Qb3 Be7 12.0-0 0-0 13.Rac1 cd4 14.Na4 Qd6 15.Nd4 Ne5 (15...e5 16.f3 ed4 17.fg4 Ng4 18.Rf4+=) 16.f3 Nc4 17.Qc4 Bh5 18.Rfd1 Qe5 (18...Nd5 19.Ne2 f5 20.Ng3+=) 19.Re1 (19.Qb3 Qg5 20.e4=) 19...Bd6+= 20.g3 Qd5 (20...Rfe8 21.Nb6 Rad8 22.Qc3+=) 21.Nb6 (21.Qd5!? ed5 22.Nf5+–) 21...Qc4+= 22.Rc4 (22.Nc4 Be7+=) 22...Rad8= 23.e4 (23.Kg2 Rfe8=) 23...Be5 (better is 23...e5!? 24.Nb3 Bb8+=) 24.f4+= Bb8 25.Bc3 White intends e5 25...e5 26.Nf5 ef4 27.e5 (27.Ne7 Kh8 28.gf4 A) 28...Bf4? 29.e5 Nd7 30.Rf4 (30.Ba5?! Bd2 31.Bd2 Nb6=) 30...Nb6 31.Ba5+–; B) 28...Ba7 29.Ba5 Rfe8=) 27...Nd7 (27...Ba7 28.ef6 (28.Ba5? Nd5–+) 28...Bb6 29.Kf1=) 28.Nd7 (28.Nd5 fg3 29.Nde7 Kh8 30.hg3 f6+=) 28...Rd7= 29.gf4 Bg4 30.Nd4 (30.Ne3 Be6 31.Re4 Rd3 32.Ba5 Ra3=) 30...Ba7 (30...Rc7 31.Rc7 Bc7 32.Rc1+=) 31.Kg2= Rfd8 32.Nc2?? (better is 32.h3 Rd4 33.Bd4=) 32...Be6–+ 33.Rce4? (33.Ree4 Bb6 34.Ne1–+) 33...Bd5 34.Ba5 Be4 (better is 34...Rc8!? 35.Nb4 Be4 36.Re4–+) 35.Re4 b6 36.Bb4 Rd2! 37.Bd2 Rd2 38.Kg1 (38.Kf3 Rc2 39.Ra4 Rc7–+) 38...Rc2 39.Rd4 Rc8 40.Rd7 (40.Kf2 Bb8 41.h4 Kf8–+) 40...Bb8 41.Kf2 (41.Rb7 g5! 42.fg5 Be5–+) 41...Kf8 (better is 41...g5!? 42.fg5 Be5 43.h4–+) 42.Ke3 Bc7 43.Ke4 Bd8 44.f5 Be7 (44...g6 45.fg6 hg6 46.e6 f5 47.Ke3 Bg5 48.Kd4–+) 45.a4 (better is 45.Rb7–+) 45...Rc4 46.Kd5 (46.Rd4 Rc2 47.h3 Ke8–+) 46...Rc5 (better is 46...Ra4!? 47.Rb7 Bd8 48.e6 fe6 49.fe6–+) 47.Ke4 Rc4 48.Kd5 Ra4 49.Rb7 Bd8 50.e6 fe6 51.fe6 Rf4 (51...Rg4 52.Rf7 Ke8 53.Rb7–+) 52.Rd7 (52.Kc6 Rf2 53.h3 Rf3–+) 52...Be7 53.Rb7 Rf5 54.Kc6 (54.Ke4 g6 55.Rb8 Kg7 56.Rb6 Kf6–+) 54...Bc5 55.Rb8 (55.Rc7–+) 55...Ke7 56.Rb7 Kf6 57.Rf7 Ke6 58.Rg7 Rh5 59.Rg2 Ke5 60.Re2 Kf4 0–1. Morriss,Pete (2030) – Gergel,Vladimir P (2200), Katerini GRE ,World Seniors Ch, 2014.

5.Nf3 d5 6.bc6 bc6 7.d4 Nbd7 8.Nbd2 e6 9.c4 c5 10.Rb1 Qc7 11.cd5 ed5 12.dc5 Bc5 13.Nb3 Rb8 14.Bb2 Be7 15.Rc1 Qb6 16.Bd4 Qd8 17.a4 Bb4 18.Nbd2 0-0 19.Bb5 Ne4 20.0-0 Ndf6 21.Ne4 Ne4 22.Be5 Rb5 23.ab5 Bg4 24.Bc7 Qd7 25.b6 Bf3 26.Qf3 Nd2 27.Qh3 Qb5 28.Rfd1 Nc4 29.Rc4?? (better is 29.Qf5 Nb6 30.e4+–) 29...dc4+= 30.Qd7 (30.Qd7 Qd7 31.Rd7+–) 1–0. Caissa – BlackPanther, playchess.de, 2004.

6.Nc3 e6 7.d4 dc4 8.Bc4 Qc7 9.Nf3 Bd7 10.Qb3 a4 11.Na4 (11.Qc2!?+=) 11...cb5= 12.Bb5 Ra4 13.Qa4?? (better is 13.Ba4 Qa5 14.Bd2 Qa4 15.Qb7+=) 13...Qc3–+ 14.Nd2 Qa1 15.Bd7 Nfd7 (worse is 15...Nbd7 16.0-0 Qa2 17.Qa8 Ke7 18.Qb7–/+) 16.Qc4 Ba3 (better is 16...Nb6 17.Qb5 N8d7–+) 17.Nb3–/+ Qb1 18.0-0 (18.Qc8 Ke7 19.Qh8 Bb4 20.Ke2 Qb3 21.Qh7 Qa2 22.Kd1 Qf2 23.Qg7–+) 18...Be7–+ 19.Ba3 Qe4?? (better is 19...Qf5!? 20.Qc8 Bd8 21.Qb7 Qd5–+) 20.Qc8+= Bd8 21.Na5 Nc6 22.Nb7 Qd5 23.Rc1 Ndb8? (better is 23...Qb3 24.Bd6 Qa4+–) 24.Nd6 Kf8 (24...Ke7 25.Qb7 Nd7 26.Rc6+– (26.Qc6?! Qc6 27.Rc6 Nf6+–)) 25.Nb7 (better is 25.Rc6 g6 26.Nf5 Kg8 27.Ne7 Kg7 A) 28.Qb8? Be7 29.Qa7 Qb3–+ (29...Qc6?! 30.Qe7 Qc3 31.g4–/+); B) 28.Nd5 Nc6 29.Qc6 ed5 30.Qd5+–) 25...Kg8 26.Bd6 h5 27.Bb8 (27.Nd8?! Kh7 28.Bc7 h4+/–) 27...Nb8 (27...Nd4 28.ed4 (28.Qd8 Qd8 29.Nd8 Ne2 30.Kf1 Nc1–+) 28...Kh7 29.Be5+–) 28.Qb8 (28.Rc5!? Qd7 29.Qb8 g6 30.Qd8 Qd8 31.Nd8 Kg7+–) 28...Kh7 29.Rc8 (29.Nd8?! Rd8 30.Qb1 Qf5 31.Qf5 ef5+–) 29...Qb3 30.h3 Qb1 31.Kh2 1–0. Stejskal,Drahoslav – Pachmann,Ales (2230), CZE–chT1a Czechia, 1995.

6.Nc3 e6 7.Nf3 Be7 8.d4 0-0 9.c5 Qc7 10.b6 Qd8 11.Bd3 Nbd7 12.Na4 Ne4 13.Be4 de4 14.Nd2 f5 15.Qb3 Nf6 16.Nc4 Nd5 Black prepares f4 17.Bd2 f4 18.0-0-0 Qe8 19.g3 fe3 20.fe3 Qh5 21.Qb1 (worse is 21.Ba5 e5+=; worse is 21.Na5 e5 22.de5 Qe5+=) 21...Qe2 22.Qb3 Bg5 Pawn e3, live or die! 23.Rde1 Qg2 24.h4 (24.Na5 Be3 25.Be3 Ra5–/+) 24...Bf6 25.Rhg1 Qh3 26.Nd6 e5 27.Ne4 ed4? (better is 27...Be6+/–) 28.Nf6+– Rf6 29.e4 (29.ed4?! Be6+=) 29...Be6 30.ed5 Bd5 31.Qd3 Rf3 32.Qd4 Ra3 (32...Rg3 33.Bc3 Rc3 34.Nc3 Qd7+–) 33.Re7 Bf7 34.Bc3 (34.Rb7?! Rg3 35.Rg3 Qg3+–) 34...Kf8 (34...Rc3 35.Nc3 Rf8+–) 35.Rf7! Kf7 (35...Kf7 36.Qg7 Mate attack) 36.Qg7 Ke6 37.Re1 1–0. Frosinos,Ioannis (1875) – Markantonaki,H (2125), Aegean Open, Agios Kirykos GRE, 2010.

6.Nf3 cb5 A) 7.cb5 A1) 7...Bf5 8.Bb2 (8.Be2 e6 9.Nh4 Bg6 10.Bb2=) 8...e6 9.Nh4 Bg4 10.f3=; A2) 7...e6 8.Be2 (8.Bb2 Bd6 9.Be2 Nbd7 10.0-0=) 8...Bd6 9.Bb2 0-0 10.0-0=; A3) 7...Bg4 8.h3 (8.Bb2 Nbd7 9.Be2 e6 10.Nc3+=) 8...Bh5 9.Bb2 Nbd7 10.Nc3=; B) 7.Qb3 B1) 7...a4 8.Qb2 (8.Qb5 Qb5 9.cb5 Bf5 10.Bb2=) 8...b4 9.ab4 dc4 10.Na3=; B2) 7...Qc5 8.Qb5 Qb5 9.cb5 Bf5 10.Be2=; B3) 7...Qc7 8.Qb5 (8.c5 Bd7 9.Nc3 Qc5 10.Nb5+=) 8...Bd7 9.Qb2 dc4 10.Nc3=; C) 7.cd5 C1) 7...e6 8.de6 (8.Nc3 b4 9.Qb3 Na6 10.Bc4=) 8...Be6 9.Bb2 Nc6 10.Ng5+=; C2) 7...Nd5 8.Qb3 (8.Nc3 Nc3 9.dc3 Nd7 10.Rb1=) 8...Nc7 9.Nc3 b4 10.d4=.

6.Nf3 dc4 A) 7.bc6 A1) 7...Qb3 8.Qe2 (8.Qb3 cb3 9.cb7 Bb7 10.Bb5=) 8...Nc6 9.Qc4 a4 10.Nc3=; A2) 7...Qc6 8.Nd4 (8.Ne5 Qc7 9.Nc4 b5 10.Nb2=) 8...Qa6 9.Qa4 Bd7 10.Qc4=; B) 7.Bc4 B1) 7...Qc5 8.Be2 e5 9.d4 ed4 10.ed4+=; B2) 7...e6 8.Nc3 (8.Qe2 Bd6 9.Nc3 0-0 10.0-0+=) 8...Bd6 9.d4 0-0 10.0-0+=; B3) 7...cb5 8.Qb3 e6 9.Bb5 Bd7 10.Nc3=.

6.Nf3 e6 A) 7.bc6 A1) 7...Nc6 8.Nc3 (8.d4 Qc7 9.c5 b6 10.cb6=) 8...Be7 9.Rb1 Qd8 10.d4+=; A2) 7...Be7 8.cd5 (8.cb7 Bb7 9.Nc3 dc4 10.Bc4+=) 8...Nd5 9.d4 Nc6 10.Bd3+=; A3) 7...bc6 8.Nc3 (8.d4 Qc7 9.Nc3 Ba6 10.Be2=) 8...Qc7 9.Bb2 Bd6 10.cd5=; B) 7.d4 dc4 8.bc6 (8.Bc4 cb5 9.Bd3 Bd7 10.0-0=) 8...Qb3 9.Qb3 cb3 10.Nbd2=; C) 7.Nc3 C1) 7...Be7 8.Be2 (8.d4 Qc7 9.c5 Nbd7 10.Be2+=) 8...0-0 9.0-0 Ne4 10.Na4+=; C2) 7...c5 8.d4 (8.Na4 Qd6 9.d4 b6 10.Bb2+=) 8...Nbd7 9.cd5 ed5 10.Be2+=; C3) 7...Qc7 8.d4 (8.Bb2 Be7 9.bc6 bc6 10.Be2+=) 8...Be7 9.Bd3 dc4 10.Bc4+=.

6.Nf3 Bf5 A) 7.bc6 A1) 7...Nc6 8.Nc3 (8.cd5 Nd5 9.d3 e5 10.Nbd2=) 8...d4 9.Nd5 Qd8 10.Qb3+=; A2) 7...bc6 8.Nc3 (8.cd5 cd5 9.Nc3 e6 10.Bb5=) 8...Nbd7 9.Nh4 Bg4 10.f3+=; B) 7.Bb2 B1) 7...e6 8.Bf6 (8.Bd4 Qd8 9.bc6 Nc6 10.cd5=) 8...gf6 9.bc6 bc6 10.Nc3=; B2) 7...dc4 8.Bc4 e6 9.Nc3 Bd6 10.Qe2=; B3) 7...Nbd7 8.Nc3 (8.cd5 cd5 9.Nh4 Bg6 10.Be2=) 8...e6 9.bc6 bc6 10.Na4=; C) 7.Nc3 C1) 7...Qd8 8.Qa4 (8.bc6 bc6 9.Qa4 dc4 10.Qc4+=) 8...e6 9.Nd4 dc4 10.bc6+=; C2) 7...Nbd7 8.bc6 (8.d4 e6 9.Nh4 Bg6 10.c5+=) 8...bc6 9.d4 h6 10.cd5+=; C3) 7...e6 8.Nh4 (8.bc6 bc6 9.Nh4 Bg6 10.Ng6+=) 8...Bg4 9.f3 Bh5 10.bc6+=.

6.Nf3 Bg4 7.a4 (7.Nc3 A) 7...Nbd7= 8.bc6 (8.d4 dc4 9.Bc4 e6 10.0-0=) 8...bc6 9.d4 e5 10.cd5+=; B) 7...Qd8 8.bc6 (8.d4 e6 9.c5 Be7 10.Bd3+=) 8...bc6 9.cd5 Nd5 10.Qc2+=; C) 7...e6 8.h3 (8.bc6 bc6 9.h3 Bh5 10.d4+=) 8...Bh5 9.bc6 bc6 10.d4+=; 7.bc6 A) 7...Nc6 8.Nc3 (8.cd5 Nd5 9.d4 a4 10.Nbd2+=) 8...d4 9.Nb5 de3 10.fe3+=; B) 7...Qc6 8.cd5 (8.h3 Bf3 9.Qf3 e5 10.Nc3=) 8...Nd5 9.Bb2 Nd7 10.Be2+=; C) 7...bc6 8.d4 (8.h3 Bf3 9.Qf3 Nbd7 10.cd5=) 8...e6 9.Nbd2 Be7 10.Bd3+=; 7.d4 A) 7...dc4 8.Bc4 e6 9.Nc3 Nbd7 10.0-0=; B) 7...Qc7 8.bc6 (8.Nc3 e6 9.c5 Nbd7 10.Bd3=) 8...Nc6 9.cd5 Bf3 10.gf3+=; C) 7...e6 8.Nbd2 (8.bc6 Qc6 9.h3 Bf3 10.Qf3=) 8...Nbd7 9.c5 Qc7 10.Qa4=) 7...Nbd7 (7...e6 8.Be2 (8.d4 Bb4 9.Bd2 0-0 10.c5+=) 8...Nbd7 9.0-0 Bb4 10.Bb2+=; 7...e5 8.h3 Bf3 9.Qf3 Bb4 10.cd5+=) 8.Ba3 (8.d4 c5 9.cd5 cd4 10.Be2=; 8.bc6 bc6 9.cd5 Nd5 10.Be2+=) 8...Ne5 (8...e5 9.Bf8 Kf8 10.cd5+=) 9.c5 (9.cd5 cd5 10.d4=) 9...Qd8 (9...Qc7 10.Be2=) 10.Be2 Nf3 11.Bf3 Bf3 12.Qf3 e5 13.d4 ed4 14.ed4 Be7 15.Nc3 0-0 16.0-0 Nd7 17.Qd3 f5 18.b6 Kh8 19.Bc1 Nc5 20.dc5 Bc5 21.Ba3 Qb6 22.Rab1 Bb4 23.Na2 c5 24.Qd5 Rad8 25.Qe5 Rde8 26.Qg3 Re2 27.Bb2 Qh6 28.Nc3 Re6 29.Nd5 f4 (29...Qg6!? 30.Qg6 hg6 31.Rfd1+– (31.Nb4?! ab4 32.Rfd1 c4+/–)) 30.Qf3+– b6 31.Bc1 g5 32.Bb2 Kg8 33.Nc7 Re7 34.Qd5 Rff7 35.Qd8 (better is 35.Rfd1 Re2 36.Qd8 Rf8 37.Qd3 Rb2 38.Rb2+–) 35...Qf8+/– 36.Qf8 Kf8 37.Nd5 Re6 38.Rfd1 Ke8 39.Nc3 Rfe7 40.Kf1 Rh6 41.Kg1 Rhe6 42.h3 f3 (42...Kf7 43.Kf1+/–) 43.gf3 Kf7 44.Nd5 Rb7 (44...Rd7 45.Ne3 Rd2 46.Ng2+/–) 45.Ne3 (45.f4!? gf4 46.Kg2 Rh6+–) 45...Kg6 46.Rd8 b5 47.Rg8 Kh5 48.ab5 Rb5 49.Bc3! a4 (49...Bc3 50.Rb5 Pinning (50.Rb5 Deflection; 50.Rb5 Clearance)) 50.Ra8+– a3 51.Ra3! Reb6 (51...Ba3 52.Rb5 Pinning (52.Rb5 Deflection)) 52.Bb4 (52.Rab3 Rb7+–) 52...cb4 53.Rab3 Rf6 54.Kg2 Rf4 55.Nc2 Rbf5 56.Nb4 Rc4 57.R1b2 Ra5 58.Nc2 Rac5 (58...Ra6 59.Ne3 Rf4 60.Rb6+–) 59.Ne3 Rf4 (59...Rc1+–) 60.Rb6 Rc8 (60...g4 61.fg4 Kg5 62.h4 Kh4 63.Rh6 Kg5 64.Rh5 Kg6 65.Rc5 Rf6+–) 61.Ng4 (61.Ng4 Rc6 62.Rc6 Rf6 63.Rf6 h6 64.Rh6#) 1–0. Zak,Pawel (1740) – Norov,Artem, 47. Miedzynarodowy Festiwal Szachowy, 2011.

6.a4 d5 7.Nf3 (7.Bf6 ef6 8.Nc3 Nd7 9.Nf3 Bb4 10.Bd3 0-0 11.0-0) 7...Bg7 8.c4 Nbd7 9.Nc3 0-0 10.d4 Ne4 11.Ne4.

6.a4 Bg7= 7.Nf3 (7.Nc3 0-0= 8.Rb1 d5 (8...cb5 9.Nb5 Na6 10.Nf3 Nc5 11.Bd3) 9.bc6 bc6 (9...Qc6 10.Nf3 Na6 11.Nd4) 10.h4 (10.Ba3 Qc7 11.Nf3) 10...Qc7 (10...Na6 11.h5) 11.Be2; 7.Bd4 c5 8.Bf6 Qf6 9.Nc3 d5 10.Nd5 Qa1 11.Nc7) 7...0-0 (7...d5 8.c4 (8.Nc3 0-0 9.Be2 c5 10.0-0 d4 11.Na2) 8...0-0 9.Bd4 c5 10.Bf6 Qf6 11.Nc3) 8.Be2 (8.Nc3 d5 9.Rb1 c5 10.Bd3 c4 11.Be2) 8...d5 (8...cb5 9.Bb5 Nc6 10.Nc3 d5 11.0-0) 9.0-0 (9.Nc3 c5 (9...Be6 10.0-0 cb5 11.Nb5) 10.Bd3 (10.d4 Na6 11.0-0) 10...Be6 11.0-0) 9...Bg4 (9...Nbd7 10.Nc3 (10.Bd4 Qc7 11.Bb2) 10...Nc5 11.Ba3) 10.Na3 (10.Nc3 c5= (10...Nbd7 11.bc6; 10...Ne4 11.Rb1) 11.Ng5+= (11.h3)) 10...Nbd7 11.d4 (11.Rb1 c5=; 11.h3=+) 11...Rfd8 (11...cb5 12.Nb5 Rac8 13.Rb1=) 12.h3 (12.c4 c5=) 12...Bf3 13.Bf3 Qc7 (13...cb5 14.Nb5 Rdc8 15.Rc1=) 14.bc6 (14.Rc1 e5=) 14...bc6 (14...Qc6 15.c4=) 15.c4+= e5 16.cd5 Nd5 17.Bd5 cd5 18.Nb5 Qb6 (18...Qb7 19.Rc1+=) 19.de5 Be5 (19...Ne5 20.Bd4 Qc6 21.Rc1+=) 20.Be5 (20.Rb1 Qc5+=) 20...Ne5 21.Qd4 (21.Rb1 Rac8+=) 21...Qd4 22.Nd4 Nd3 (22...Nc4 23.Rfb1+=) 23.Ra3 (23.Rfb1 Nb4+=) 23...Nb2 24.Rb1 Nc4 25.Raa1 Rab8 (25...Kg7 26.Rb5+=) 26.Nc6 (26.Rb5 Rb5 27.ab5 Rb8+=) 26...Rb1= 27.Rb1 Rd6 28.Nd4 Rb6 (28...Kg7 29.Rb5=) 29.Rb6 Nb6 30.Nc6 Na4 31.Na5 Kg7 32.Nc6 Kf6 (32...f5 33.Nd4=) 33.Kf1 Ke6 (33...Nb2 34.h4=) 34.Ke2 Nc5 (34...Nb2 35.Nd4 Kf6 36.g4=) 35.Nb4 (35.Nd4 Ke5=) 35...Kd6 36.Nd3 Ne6 37.Kf3 (37.g4 h6=) 37...d4 (37...h5 38.h4=) 38.ed4 Nd4 39.Ke4 Ne6 40.h4 f5 41.Ke3 h6 42.Nf4 Nf4 43.Kf4 Ke6 44.g4 fg4 45.Kg4 Kf6 46.h5 gh5 47.Kh5 Kf5 48.Kh6 ½–½. Ramos Moreno,F J (2125) – Urbina Perez,J A (2205), Liga Andaluza, 2011.

6.a4 Bh6 7.Nf3 (7.Bd4 c5 8.Bf6 Qf6 9.Nc3 e6 10.Qf3 Bg7 11.Qg3) 7...d6 8.Nc3 0-0 9.Rb1 Nbd7 10.bc6 bc6 11.Ba3.

6.Nc3 A) 6...Bg7 7.Nf3 (7.Na4 Qd8 8.Nf3 d5 9.Be2 0-0 10.Bd4 Ne4 11.d3) 7...0-0 8.Na4 Qd8 9.c4 d5 10.Qb3 Bg4 11.h3; B) 6...d5+= 7.Na4 (7.Nf3 Bg7 8.Na4 Qd8 9.Bd4 0-0 10.h4 Nbd7 11.bc6) 7...Qc7 8.b6 Qd6 9.Nf3 Nbd7 10.c4 e5 11.cd5.

6.Bd4 c5 7.Be5 (7.Bb2 Bg7 8.Nf3 0-0 9.Nc3 d6 10.Bd3 Nbd7 11.a4) 7...d6 8.Bf6 ef6 9.Bc4 Be6 10.Be6 fe6 11.Nc3.

6.Bf6 ef6 7.Nc3 (7.Nf3 Bg7 8.Nc3 f5 9.Bd3 0-0 10.0-0 Qc5 11.Qe2) 7...Bg7 8.Nf3 f5 9.Bd3 cb5 10.0-0 0-0 11.Qb1.

7.Nc3 0-0 8.Rb1 d6 9.Na4 Qc7 10.b6 Qd7 11.Bd3.

7.c4 0-0 8.Nc3 d5 9.Na4 Qc7 10.Be5 Qd8 11.cd5.

9.Be2 cb5 10.Nb5 (10.cb5) A) 10...Bf5 11.d3 (11.d4) 11...d5 12.Bd4 Qc6 13.Ne5 Qc8 14.Rc1+/–; B) 10...a4 11.Rb1 (11.0-0 Bf5 12.d3 d5 13.Bd4 Qa5 14.Bc3+=; 11.d4) 11...Qd8 12.0-0 Bf5 13.d3 Nc6 14.Nc3+=; C) 10...Bg4 11.0-0 (11.d4; 11.Rb1; 11.Qa4) 11...Nbd7 12.Rb1 Rfc8 13.d3 e5 14.e4+=; D) 10...e5 11.d4 (11.0-0; 11.Rb1) 11...e4 12.Nd2 Bd7 13.Rb1 Bb5 14.Bc3+/–; E) 10...Qd8 11.0-0 (11.d4; 11.d3; 11.Rb1; 11.Rc1) 11...Nc6 12.d4 Bf5 13.d5 Na7 14.Na7+=; F) 10...Nc6 11.Rb1 (11.d4) 11...Qd8 12.d3 Bg4 13.0-0 Rc8 14.h3+=.

9.Be2 Ne4 A) 10.0-0 A1) 10...Bc3 11.Bc3 (11.dc3 Nd7 12.Nd2 Nec5 13.a4 Nf6 14.Nb3=) 11...Nc3 12.dc3 Nd7 13.Qd4 c5 14.Qh4+=; A2) 10...Nc3 11.Bc3 Bc3 12.dc3 Nd7 13.Qd4 c5 14.Qh4+=; B) 10.d4; C) 10.Rc1; D) 10.Na4 D1) 10...Qc7 11.Bg7 (11.b6) 11...Kg7 12.b6 Qd8 13.d4 Bg4 14.h3+=; D2) 10...Qd8 11.Bg7 (11.0-0) 11...Kg7 12.d3 Nf6 13.Rb1 Nbd7 14.0-0+=.

9.Be2 e5 10.d4 A) 10...Nbd7 11.0-0 (11.c5 dc5 12.de5 Ng4 13.Na4 Qd8 14.bc6+=) 11...Re8 12.Rb1 c5 13.de5 de5 14.e4+=; B) 10...cb5 11.Nb5 (11.de5) 11...e4 12.Nd2 Bd7 13.Rb1 Na6 14.Bc3+=; C) 10...ed4 11.Qd4 (11.Nd4 Re8 12.bc6 bc6 13.Rb1 Nbd7 14.Qa4+=; 11.ed4) 11...Qd4 12.Nd4 c5 13.Nf3 Rd8 14.Rd1+=; D) 10...e4 11.Nd2 Re8 12.0-0 c5 13.Na4 Qc7 14.Qb3+=.

9.Be2 Bf5 A) 10.d4 A1) 10...cb5 11.Nb5 Rc8 12.0-0 Nbd7 13.Rc1 a4 14.Bd3+=; A2) 10...c5 11.0-0 (11.Na4; 11.Bd3; 11.Nh4) 11...Rc8 12.Na4 Qa7 13.Bd3 Bd3 14.Qd3+=; A3) 10...Re8 11.0-0 (11.Na4 Qd8 12.0-0 Nbd7 13.Nc3 e5 14.Qd2=; 11.c5; 11.Bd3; 11.Rc1) 11...cb5 12.Nb5 Qc6 13.Rc1 Ne4 14.Bd3+=; A4) 10...h6 11.0-0 (11.Na4; 11.c5; 11.Nh4) 11...c5 12.Na4 Qa7 13.Nh4 Bd7 14.Qd3+=; A5) 10...Rc8 11.0-0 (11.Qa4 cb5 12.Nb5 Qc6 13.0-0 Nbd7 14.Rac1+=) 11...cb5 12.Nb5 Nbd7 13.Nh4 Be4 14.Rc1+=; B) 10.0-0 B1) 10...Rc8 11.Rc1 (11.d3 cb5 12.e4 Bd7 13.cb5 a4 14.d4+=; 11.d4 cb5 12.Nb5 Nbd7 13.Nh4 Be4 14.Rc1= ; 11.Nd4 Bd7 12.Rb1 cb5 13.Ndb5 h6 14.e4+=; 11.Na4) 11...c5 12.d4 Qc7 13.Re1 Ne4 14.Nh4+=; B2) 10...c5 11.Na4 (11.d4; 11.Nh4; 11.d3; 11.Re1; 11.Qa4) 11...Qc7 12.d4 cd4 13.Nd4 Bc8 14.b6+=; B3) 10...h6 11.d3 (11.d4 cb5 12.Nb5 Rc8 13.Rc1 Nbd7 14.Nh4+= ; 11.Na4; 11.Nd4; 11.Nh4) 11...c5 12.Na4 Qd8 13.d4 cd4 14.Nd4+=; B4) 10...Re8 11.Re1 (11.d4 Qc7 12.Qb3 Nbd7 13.Nh4 Bg4 14.Bg4= ; 11.Nd4 Bd7 12.Na4 Qc7 13.Nb3 b6 14.d4+=; 11.d3 e5 12.e4 Bd7 13.Rb1 c5 14.Na4+=; 11.Nh4 Bd7 12.d4 cb5 13.Nb5 Na6 14.Nf3+=; 11.Na4 Qd8 12.d4 Nbd7 13.Nh4 Be6 14.bc6+=) 11...e5 12.d4 Ne4 13.Ne4 Be4 14.Ng5+=; B5) 10...cb5 11.cb5 (11.Nb5 Rc8 12.Nfd4 Bd7 13.Rb1 h6 14.Nf3+= ) 11...Rc8 12.Rc1 e5 13.Na4 Qd8 14.Rc8+=; B6) 10...e5 11.d4 Qc7 12.Qd2 e4 13.Ne1 Nbd7 14.Rd1+=; C) 10.d3 C1) 10...cb5 11.Nb5 d5 12.Bd4 Qc6 13.Ne5 Qc8 14.Rc1+/– ; C2) 10...Re8 11.bc6 (11.0-0; 11.e4; 11.Rb1) 11...Nc6 12.Rb1 Qd8 13.Nd5 Nd5 14.cd5+=; C3) 10...e5 11.bc6 (11.e4 Bg4 12.0-0 Nbd7 13.Ng5 Be2 14.Qe2+= ; 11.0-0 Nbd7 12.e4 Be6 13.Rb1 Rac8 14.Bc1+= ) 11...Nc6 12.Rb1 Rac8 13.e4 Bg4 14.0-0+=; C4) 10...d5 11.cd5 (11.Na4 Qd8 12.bc6 bc6 13.Rc1 Bg4 14.0-0+= ; 11.Nd4 Bd7 12.0-0 dc4 13.dc4 e5 14.Na4+=) 11...cd5 12.0-0 Rc8 13.Nd4 Bd7 14.f4+=.

9.Be2 Bg4 A) 10.d4 A1) 10...Rc8 11.Rc1 (11.0-0 cb5 12.cb5 Nbd7 13.Na4 Qd8 14.h3= ; 11.Na4 Qd8 12.0-0 cb5 13.cb5 Nbd7 14.Bd3= ; 11.Bd3 cb5 12.Nb5 d5 13.c5 Qe6 14.Rb1=; 11.bc6 Qc6 12.0-0 a4 13.h3 Bd7 14.Rc1+=; 11.Qb3 cb5 12.Qb5 Qb5 13.Nb5 Nbd7 14.Rc1=; 11.Rb1 Nbd7 12.Bd3 e5 13.h3 Bf3 14.Qf3+=) 11...c5 12.Na4 Qa7 13.Bd3 Nfd7 14.h3+= ; A2) 10...Nbd7 11.h3 (11.0-0 Rfc8 12.h3 Bf3 13.Bf3 cb5 14.cb5= ; 11.Qd3 Bf5 12.Qd2 cb5 13.Nb5 Ne4 14.Qd1= ) 11...Be6 12.d5 cd5 13.cd5 Bf5 14.Nd4+=; A3) 10...c5 11.Na4 (11.0-0; 11.Qd3) 11...Qa7 12.Bd3 Nfd7 13.0-0 f5 14.h3+=; A4) 10...e6 11.h3 (11.0-0; 11.Na4; 11.c5) 11...Bf3 12.Bf3 Rd8 13.0-0 Nbd7 14.bc6+=; A5) 10...Re8 11.0-0 (11.Na4 Qd8 12.0-0 Nbd7 13.Nc3 e5 14.Rc1= ; 11.h3 Bf5 12.0-0 cb5 13.Nb5 Rc8 14.Rc1+=) 11...cb5 12.Nb5 Qc6 13.d5 Qc8 14.Nfd4+=; A6) 10...cb5 11.Nb5 (11.cb5 Rc8 12.Rc1 Nbd7 13.0-0 d5 14.Bd3= ) 11...Rc8 12.Rc1 Bf5 13.0-0 Nbd7 14.Bd3+=; B) 10.h3 B1) 10...Bd7 11.d4 (11.0-0 Rc8 12.d4 cb5 13.Nb5 d5 14.c5+= ; 11.Na4; 11.Rb1; 11.bc6) 11...Qc7 12.0-0 Bf5 13.Nh4 Bd7 14.Qd3+=; B2) 10...Be6 11.Qa4 (11.d4 cb5 12.Nb5 Rc8 13.d5 Bf5 14.Bd4+= ; 11.d3 cb5 12.Nb5 d5 13.Bd4 Qd8 14.c5=; 11.0-0 Nbd7 12.bc6 bc6 13.Rb1 Rab8 14.Nd4+=) 11...Nbd7 12.d4 c5 13.d5 Bf5 14.Nh4+=; B3) 10...Bf3 11.Bf3 Nbd7 12.d4 cb5 13.Nb5 d5 14.Rc1+= ; B4) 10...Bc8 11.0-0 (11.d4; 11.Na4; 11.d3) 11...c5 12.d4 Nbd7 13.Qd3 Re8 14.Rad1+=; B5) 10...Bf5 11.d4 (11.0-0 cb5 12.Nb5 Rc8 13.d3 d5 14.Bd4= ) 11...cb5 12.Nb5 Rc8 13.0-0 Nbd7 14.Rc1+=; C) 10.0-0 C1) 10...d5 11.cd5 cd5 12.Rc1 e6 13.Na4 Qd6 14.Qc2+=; C2) 10...e5 11.d4 (11.h3; 11.Rb1) 11...Nbd7 12.Ne5 Ne5 13.de5 Be2 14.Ne2+/–; C3) 10...Rc8 11.bc6 (11.d4 cb5 12.cb5 d5 13.Rc1 Nbd7 14.Qb3+= ; 11.Rc1 Nbd7 12.d3 e5 13.d4 ed4 14.ed4+=; 11.h3 Bf5 12.d3 cb5 13.e4 Bd7 14.cb5+=; 11.d3 e5 12.d4 Nbd7 13.Rc1 ed4 14.ed4+=; 11.Na4 Qd8 12.bc6 Nc6 13.Bf6 Bf6 14.Rb1+=; 11.Qa4 Nbd7 12.d4 c5 13.d5 Qc7 14.Qc2=; 11.Re1) 11...Nc6 12.Rb1 Bf5 13.d3 Qc7 14.Nd5+=; C4) 10...c5 11.h3 (11.d3 Nbd7 12.Na4 Qc7 13.h3 Bf3 14.Bf3+= ; 11.d4 Nbd7 12.h3 Bf3 13.Bf3 Rac8 14.Qd3+= ; 11.Re1; 11.Qa4; 11.Na4; 11.Qc2) 11...Bf5 12.Na4 Qc7 13.d4 Rd8 14.dc5+/–; C5) 10...e6 11.d4 (11.h3 Bf3 12.Bf3 d5 13.d3 dc4 14.dc4+= ; 11.d3 d5 12.Na4 Qd8 13.Rc1 Nbd7 14.bc6+= ; 11.Na4 Qd8 12.d4 Nbd7 13.bc6 bc6 14.h3+=; 11.Qa4 Nbd7 12.d4 c5 13.Rad1 Qc7 14.d5=) 11...cb5 12.Nb5 Rc8 13.Qa4 Ne4 14.Rfc1+=; C6) 10...cb5 11.Nb5 Nbd7 12.Rb1 Rfc8 13.d3 e5 14.e4+= ; C7) 10...Nbd7 11.h3 (11.d4 Rfc8 12.h3 Bf3 13.Bf3 cb5 14.cb5= ; 11.bc6 bc6 12.Rb1 Qc7 13.h3 Bf5 14.d3= ) 11...Bf3 12.Bf3 d5 13.cd5 cb5 14.Qe2+=; D) 10.d3 d5 11.Qa4 (11.Na4 Qd8 12.0-0 cb5 13.cb5 Nbd7 14.Ne5=; 11.Qb3 dc4 12.Qc4 Nbd7 13.d4 Rac8 14.Rc1=; 11.cd5 cd5 12.Rc1 Rc8 13.d4 Nbd7 14.Qb3=) 11...dc4 12.Qc4 Nbd7 13.d4 Rfc8 14.Rd1=; E) 10.Rb1 E1) 10...Rc8 11.bc6 (11.d3; 11.Na4; 11.d4) 11...Qc6 12.0-0 Na6 13.Nd4 Qd7 14.Na4+/–; E2) 10...Bf5 11.d3 c5 12.0-0 Nbd7 13.Nh4 Be6 14.f4+=; E3) 10...c5 11.d3 (11.h3; 11.0-0; 11.e4; 11.Na4; 11.Qc2; 11.Qa4) 11...Nbd7 12.0-0 e6 13.Na4 Qc7 14.b6+=; E4) 10...e5 11.0-0 (11.bc6 Qc6 12.d4 Nbd7 13.Nd5 Nd5 14.cd5+= ; 11.d4 Bf5 12.Rc1 Qc7 13.0-0 c5 14.Nd5+= ; 11.d3 Nbd7 12.bc6 Qc6 13.0-0 Rfc8 14.h3+=; 11.e4 cb5 12.cb5 Rc8 13.0-0 Nbd7 14.Ng5=) 11...Nbd7 12.d4 Rae8 13.Ne5 Ne5 14.de5+=.

10.0-0+= A) 10...Bf5 11.Rc1 (11.Nh4 Be6 12.f4 Bc8 13.d3 Qc7 14.Bf3+=; 11.d3 Rd8 12.Re1 e5 13.Na4 Qa7 14.Nh4+=; 11.Na4 Qc7 12.d4 Rd8 13.dc5 dc5 14.Be5+=; 11.Qa4 Nbd7 12.d3 Qc7 13.Qc2 Nb6 14.e4+=; 11.Re1 Re8 12.Nh4 Bc8 13.d4 Nbd7 14.Nf3+=; 11.d4 Qc7 12.Bd3 cd4 13.ed4 Bd3 14.Qd3+=) 11...e5 12.d4 e4 13.Nd2 cd4 14.Na4+/–; B) 10...Bg4 11.h3 (11.d3 Nbd7 12.Na4 Qc7 13.h3 Bf3 14.Bf3+=; 11.d4 Nbd7 12.h3 Bf3 13.Bf3 Rac8 14.Qd3+=; 11.Re1; 11.Na4; 11.Qa4) 11...Bf5 12.Na4 Qc7 13.d4 Rd8 14.dc5+/–; C) 10...h6 11.Re1 (11.d3 Bf5 12.e4 Bg4 13.Ne1 Be2 14.Qe2+=; 11.Qa4 e5 12.d3 Be6 13.Nd2 Nbd7 14.f4+=; 11.d4 Nbd7 12.Qd3 Qc7 13.Rac1 Nb6 14.e4+=; 11.Na4 Qc7 12.d3 Bf5 13.d4 Rd8 14.dc5+=; 11.Rb1 Bf5 12.d3 Rd8 13.Nd5 Nd5 14.cd5+=; 11.Ra2 Bg4 12.h3 Bf5 13.Qa1 e5 14.d4+=; 11.h3 e5 12.Qc2 Be6 13.e4 Re8 14.Rfe1+=; 11.Rc1 Bf5 12.d4 Qc7 13.Nd5 Nd5 14.cd5+=) 11...Bf5 12.d4 Rc8 13.Na4 Qa7 14.Bd3+=; D) 10...Be6 11.Rb1 (11.Na4 Qc7 12.d3 Nbd7 13.Ng5 d5 14.Ne6+=; 11.d4 cd4 12.ed4 Rc8 13.Re1 Nbd7 14.Rc1+=; 11.Qa4 Nbd7 12.d3 Qc7 13.Qc2 Nb6 14.Nd2+=; 11.Re1 Nbd7 12.d4 h6 13.e4 cd4 14.Nd5+=; 11.d3 Bf5 12.Re1 Nbd7 13.Nh4 Be6 14.d4+=; 11.Qc2 Bf5 12.e4 Bg4 13.Rfe1 Nbd7 14.Qd3+=) 11...Bf5 12.d3 e5 13.Nd2 Re8 14.Na4+=; E) 10...Qc7 11.Rc1 (11.Rb1 Bf5 12.d3 Nbd7 13.Re1 Ne5 14.Ne5+=; 11.Re1 e5 12.d4 e4 13.Nd2 Re8 14.Qb3+=; 11.d4 Nbd7 12.Qd3 Nb6 13.Rfe1 cd4 14.ed4=; 11.d3 e5 12.Ng5 Nbd7 13.Nge4 Ne4 14.de4+=; 11.Qb3 Bg4 12.h3 Bf5 13.d3 Nbd7 14.e4+=; 11.Ra2 Bg4 12.d3 Nbd7 13.h3 Bf3 14.Bf3+=; 11.Qa4 Nbd7 12.Qc2 Nb6 13.Ne4 Bf5 14.d3+=; 11.Qc2 Bf5 12.e4 Be6 13.Nd5 Bd5 14.cd5+=) 11...e5 12.d4 Bf5 13.Nd5 Nd5 14.cd5+=; F) 10...Bd7 11.d4 (11.d3; 11.Na4; 11.Qa4; 11.Re1; 11.Ra2; 11.Rb1; 11.Rc1) 11...cd4 12.Na4 Qc7 13.Bd4 Bg4 14.Nb6+/–; G) 10...Nbd7 11.Re1 (11.d3 Re8 12.Rb1 Qc7 13.Qc2 Nb6 14.Nd2+=; 11.d4 Qc7 12.Rc1 Nb6 13.Qd3 Be6 14.Ne4+=; 11.Qc2 Ne5 12.d3 Nf3 13.Bf3 Bf5 14.Rae1+=; 11.Qa4 Qc7 12.Qc2 Nb6 13.Ne4 Bf5 14.d3+=; 11.Ra2 e5 12.e4 h6 13.Qc2 Qc7 14.Qd3+=; 11.Rb1 Re8 12.Na4 Qc7 13.d3 Nb6 14.Qc2+=; 11.Rc1 Qc7 12.d4 Nb6 13.Qd3 Be6 14.Ne4+=; 11.Qb3 e5 12.Qc2 Qc7 13.e4 Nb6 14.Rac1+=) 11...e5 12.d4 Re8 13.Qc2 ed4 14.ed4+=; H) 10...e5 11.Qb1 (11.d4 cd4 12.ed4 e4 13.Ng5 Re8 14.c5+=; 11.Qc2 Bg4 12.h3 Be6 13.d4 cd4 14.ed4+=; 11.e4 Nbd7 12.Qc2 Re8 13.Qd3 Qc7 14.Rab1+=; 11.d3 Be6 12.Ng5 Nbd7 13.Bf3 Bf5 14.e4+=) 11...Be6 12.Qd3 Rd8 13.Ng5 d5 14.Ne6+=; I) 10...Re8 11.d3 (11.d4 cd4 12.Na4 Qc7 13.ed4 Nbd7 14.Qb3+=; 11.Na4 Qc7 12.d4 Nbd7 13.Qb3 b6 14.d5+=; 11.Re1 Bf5 12.d3 Nbd7 13.d4 Bg4 14.h3+=; 11.Qa4 Bf5 12.Nh4 Be6 13.f4 Bd7 14.d3+=; 11.Rb1 Bg4 12.d3 Nbd7 13.Na4 Qc7 14.h3+=; 11.h3 e5 12.e4 h6 13.Qc2 Be6 14.Rfe1+=; 11.Rc1 Bg4 12.d4 Nbd7 13.h3 Bf3 14.Bf3+=; 11.Ra2 e5 12.e4 h6 13.Qc2 Be6 14.Qd3=) 11...e5 12.Ne4 Nbd7 13.Qc2 Nh5 14.Nc3+=.

10.d3 A) 10...e5 11.0-0 Be6 12.Ng5 Nbd7 13.Bf3 Bf5 14.Nge4+=; B) 10...Bg4 11.Rb1 (11.0-0 Nbd7 12.h3 Bf5 13.Nh4 Be6 14.f4+=; 11.Na4 Qc7 12.0-0 Nbd7 13.h3 Bf5 14.e4+=; 11.h3 Bf5 12.g4 Be6 13.g5 Nfd7 14.h4+=) 11...Nbd7 12.0-0 Bf5 13.Nh4 Be6 14.f4+=; C) 10...Rd8 11.Rb1 (11.Qa4 Nbd7 12.0-0 Ne5 13.Qc2 Bf5 14.e4+=; 11.Qc2 Bf5 12.0-0 Nbd7 13.Nh4 Be6 14.f4+=; 11.Na4 Qc7 12.0-0 Nbd7 13.Qb3 Nb6 14.Nb6+=; 11.0-0 Bg4 12.h3 Bd7 13.Na4 Qc7 14.d4+=; 11.Qd2) 11...Bf5 12.0-0 Nbd7 13.Nh4 Be6 14.f4+=; D) 10...Bf5 11.Qc2 (11.Nh4 Be6 12.0-0 d5 13.Nf3 dc4 14.dc4+=; 11.Na4 Qc7 12.0-0 Nbd7 13.Nc3 e5 14.Nd2+=; 11.Qa4 Nbd7 12.0-0 Qc7 13.Qc2 Nb6 14.e4+=; 11.0-0 e5 12.Na4 Qd8 13.Nd2 Nbd7 14.e4+=; 11.Qd2 Nbd7 12.0-0 Ne5 13.Na4 Nf3 14.Bf3+=; 11.e4 Bg4 12.0-0 Nbd7 13.Ng5 Be2 14.Qe2+=; 11.Rb1 Nbd7 12.0-0 e5 13.Ng5 h6 14.Nge4+=; 11.h3 e5 12.g4 Be6 13.g5 Nfd7 14.h4+=) 11...Nbd7 12.0-0 e5 13.Nd2 Be6 14.Bf3+=.

10.d4 A) 10...cd4 11.ed4 (11.Qd4 Qd4 12.ed4 Bf5 13.0-0 Rc8 14.Rfe1+=; 11.Na4 Qc7 12.Bd4 Nbd7 13.Nd2 Nc5 14.0-0=) 11...Qc7 12.0-0 Bg4 13.Re1 Rc8 14.Bd3+=; B) 10...Bg4 11.Na4 (11.0-0; 11.Qd3) 11...Qa7 12.Bd3 Nfd7 13.0-0 e5 14.de5+=; C) 10...Qc7 11.0-0 (11.Rc1 Bf5 12.0-0 Rc8 13.dc5 dc5 14.Qb3+=) 11...Bg4 12.dc5 Qc5 13.h3 Be6 14.Na4+=; D) 10...Bd7 11.Na4 (11.0-0) 11...Qa7 12.0-0 Rc8 13.Bd3 Be6 14.h3+=; E) 10...Bf5 11.Na4 (11.0-0 Rc8 12.Na4 Qa7 13.Bd3 Bd3 14.Qd3+=; 11.Bd3; 11.Nh4) 11...Qc7 12.dc5 Rd8 13.cd6 ed6 14.Nd4+/–; F) 10...Nbd7 11.0-0 (11.Qd3 Qd8 12.0-0 Nb6 13.e4 cd4 14.Nd4+=; 11.Qc2 cd4 12.ed4 Qc7 13.0-0 Nb6 14.Na4=; 11.d5 Ne5 12.Ne5 de5 13.e4 Rd8 14.Qd3+=) 11...cd4 12.ed4 Qc7 13.Re1 Re8 14.Bd3+=.

10.0-0 A) 10...Re8 11.Qc2 (11.d4 e5 12.Rb1 c5 13.de5 Ne5 14.e4+=; 11.Rb1; 11.Re1) 11...cb5 12.Nb5 e5 13.d4 e4 14.Nd2+/–; B) 10...c5 11.Ra2 (11.d3 e5 12.Nd2 Re8 13.Bf3 h6 14.Na4+=; 11.Re1 e5 12.d4 Re8 13.Qc2 cd4 14.ed4+=; 11.Qc2 Ne5 12.d3 Nf3 13.Bf3 Bf5 14.Rfe1+=; 11.Qa4 Qc7 12.Qc2 Nb6 13.e4 Bg4 14.d3=; 11.d4 cd4 12.ed4 Qc7 13.Re1 Re8 14.Rc1+=; 11.Rb1 e5 12.d3 Re8 13.Qd2 Nf8 14.Ne4+=; 11.Rc1 Qc7 12.d4 Nb6 13.Qd3 Be6 14.Nd2+=; 11.Qb3 e5 12.e4 Re8 13.Qc2 Bh6 14.Qd3+=) 11...e5 12.e4 Bh6 13.Ne1 Nb8 14.f4+=; C) 10...e5 11.d4 (11.d3 Re8 12.Rb1 Rb8 13.Re1 h6 14.d4+=; 11.bc6 bc6 12.Rb1 Qc7 13.d4 Re8 14.de5+=) 11...Re8 12.Rb1 c5 13.de5 de5 14.e4+=; D) 10...Rd8 11.d4 (11.Qc2; 11.Rc1) 11...c5 12.Qd3 Re8 13.Rfe1 cd4 14.ed4+=; E) 10...Ne4 11.Na4 (11.d4; 11.Rc1; 11.Qc2) 11...Qc7 12.Bg7 Kg7 13.Qb1 cb5 14.cb5+=; F) 10...Nc5 11.d4 (11.d3; 11.Rc1) 11...Nce4 12.Ne4 Ne4 13.Qc2 d5 14.Bd3+/–; G) 10...h6 11.d4 (11.Rc1; 11.Qc2; 11.d3) 11...c5 12.Qd3 Qc7 13.Rac1 Nb6 14.e4+=; H) 10...Ne5 11.d4 (11.Na4 Nf3 12.Bf3 Qc7 13.b6 Qd8 14.Qc2+=) 11...Nf3 12.Bf3 cb5 13.cb5 Be6 14.Qe2+=; I) 10...Qc7 11.Qc2 (11.Re1 Nb6 12.d4 c5 13.Rc1 Be6 14.d5=; 11.d4 c5 12.Rc1 Nb6 13.Qd3 Be6 14.Nd2+=) 11...Nc5 12.d4 Bf5 13.Qd1 Nce4 14.Ne4+=.

10.Rb1 A) 10...Ne5 11.bc6 (11.0-0 Bf5 12.d3 c5 13.Na4 Qc7 14.b6+=; 11.d4 Nf3 12.Bf3 cb5 13.cb5 Rd8 14.Qb3+=; 11.Na4 Qc7 12.Ne5 de5 13.b6 Qd6 14.c5+=; 11.Ne5 de5 12.d4 ed4 13.Qd4 Qc7 14.Qh4+=; 11.d3 c5 12.0-0 Bf5 13.Na4 Qc7 14.b6+=; 11.Qc2 Bd7 12.0-0 Rac8 13.Ne5 de5 14.Na4+=) 11...Qc6 12.d3 h6 13.0-0 Qd7 14.Ne5+/–; B) 10...e5 11.d4 (11.bc6 bc6 12.0-0 Qc7 13.d4 Rb8 14.Qc2=; 11.d3 d5 12.0-0 dc4 13.dc4 e4 14.Ng5+=; 11.Qc2 cb5 12.Nb5 Nc5 13.d3 Qc6 14.0-0+=; 11.0-0 Re8 12.d4 c5 13.de5 Ne5 14.e4+=) 11...ed4 12.ed4 Re8 13.0-0 cb5 14.Nb5+=; C) 10...h6 11.bc6 (11.d4 c5 12.0-0 Re8 13.Re1 e5 14.Qc2+=; 11.0-0 c5 12.Na4 Qc7 13.d3 b6 14.Nc3=; 11.d3 c5 12.0-0 Rd8 13.Re1 Qc7 14.Nd2+=; 11.Qc2 c5 12.0-0 Rd8 13.d3 Re8 14.Rfe1+=; 11.Na4 Qc7 12.0-0 e5 13.d4 Re8 14.b6+=) 11...Qc6 12.0-0 Nb6 13.Nd4 Qc5 14.d3+=; D) 10...Qc7 11.d4 (11.d3 e5 12.0-0 Nc5 13.d4 ed4 14.Nd4+=; 11.bc6 bc6 12.d4 e5 13.0-0 Re8 14.de5+=; 11.0-0 c5 12.Qc2 Nb6 13.d3 Bf5 14.e4+=) 11...c5 12.0-0 cd4 13.Qd4 e5 14.Qh4+=; E) 10...Re8 11.0-0 (11.d4; 11.d3; 11.Qc2; 11.bc6; 11.a4; 11.Na4) 11...e5 12.d4 c5 13.de5 de5 14.Qc2+=; F) 10...c5 11.d3 (11.e4 Ne5 12.Ne5 de5 13.0-0 Rd8 14.Qc2=; 11.Qc2 e5 12.0-0 Qc7 13.d3 Nb6 14.Nd2+=; 11.d4 cd4 12.ed4 Re8 13.0-0 e5 14.Re1+=; 11.0-0 e5 12.d3 h6 13.Qd2 Rd8 14.Rfd1=) 11...Ne5 12.0-0 Bf5 13.Na4 Qc7 14.b6+=.

10.d3 A) 10...Re8 11.d4 (11.Rb1 e5 12.0-0 Rb8 13.Re1 h6 14.d4+= ; 11.0-0 e5 12.Rb1 Rb8 13.Re1 h6 14.d4+=) 11...e5 12.0-0 c5 13.de5 de5 14.e4+=; B) 10...Ne5 11.0-0 (11.Ne5 de5 12.Na4 Qc7 13.b6 Qd6 14.c5+=; 11.d4 Nf3 12.Bf3 cb5 13.cb5 Be6 14.Qd3=; 11.Na4 Nf3 12.Bf3 Qc7 13.0-0 e5 14.Nc3=) 11...Bf5 12.Ne5 de5 13.Na4 Qc7 14.bc6+/–; C) 10...h6 11.0-0 (11.Rb1 c5 12.0-0 Rd8 13.Na4 Qc7 14.b6+=; 11.d4 c5 12.0-0 cd4 13.ed4 Qc7 14.Re1=) 11...e5 12.d4 Re8 13.Qc2 ed4 14.ed4+=; D) 10...d5 11.d4 (11.bc6; 11.cd5; 11.Na4) 11...dc4 12.Bc4 cb5 13.Nb5 Ne4 14.Rc1+=; E) 10...c5 11.Qa4 (11.Qc2 e5 12.0-0 Qc7 13.Nd2 Nb6 14.f4+= ; 11.Qb3 Ne5 12.0-0 Bf5 13.Qc2 Nf3 14.Bf3+=; 11.Qd2 h6 12.0-0 Rd8 13.Rfe1 e5 14.Rad1+=; 11.0-0 Qc7 12.Qc2 Nb6 13.Nd2 Bf5 14.Bf3=; 11.Rb1) 11...Ne5 12.Rd1 Nf3 13.Bf3 e6 14.0-0+=; F) 10...Rd8 11.Rb1 (11.d4 e5 12.0-0 Qc7 13.Qc2 Re8 14.Rfe1+= ; 11.0-0 e5 12.d4 Qc7 13.Re1 Nb6 14.bc6+=) 11...c5 12.g4 e6 13.g5 Ne8 14.h4+/–; G) 10...Nc5 11.Rb1 (11.0-0 Bf5 12.Rb1 e5 13.bc6 Qc6 14.e4+=; 11.d4) 11...Bg4 12.0-0 Rfc8 13.bc6 Qc6 14.Nd4+/–; H) 10...e5 11.d4 (11.Rb1 d5 12.0-0 dc4 13.dc4 e4 14.bc6+= ; 11.0-0 Re8 12.Rb1 Qc7 13.d4 ed4 14.Qd4+=) 11...Re8 12.0-0 c5 13.de5 de5 14.e4+=; I) 10...Rb8 11.Rb1 (11.0-0 e5 12.d4 Re8 13.Qc2 ed4 14.Nd4+=; 11.d4 c5 12.0-0 Qc7 13.Qd3 Nb6 14.dc5+=; 11.Na4 Qc7 12.0-0 e5 13.Rb1 Re8 14.Qb3+=) 11...e5 12.0-0 Re8 13.Re1 h6 14.d4+=.

10.d4 Rb8 11.0-0 (11.Qd3; 11.Qd2; 11.Rc1) 11...Re8 12.Qc2 c5 13.Nd5 Nd5 14.cd5 +=.

10.d4 c5 11.d5 (11.Qd3 cd4 12.ed4 Qc7 13.0-0 Nb6 14.Nd2=; 11.Qc2 cd4 12.ed4 Qc7 13.0-0 Nb6 14.Na4=; 11.0-0 Qc7 12.Rc1 Nb6 13.Qd3 Be6 14.Nd2+=) 11...Rb8 12.0-0 Qc7 13.Qd3 Nb6 14.e4 +=.

10.d4 Qc7 11.Qd3 (11.0-0 c5 12.Qd3 Nb6 13.Rfe1 cd4 14.ed4=) 11...e5 12.0-0 Re8 13.de5 Ne5 14.Ne5 +=.

10.d4 Rd8 11.0-0 (11.Qd3; 11.Qd2) 11...Re8 12.Rc1 Qc7 13.Qd2 Nb6 14.Rfd1 +=.

10.d4 e5 11.0-0 (11.c5 dc5 12.de5 Ng4 13.Na4 Qd8 14.bc6+=) 11...Re8 12.Rb1 c5 13.de5 de5 14.e4 +=.

10.d4 Re8 11.0-0 (11.Rc1 Qc7 12.0-0 e5 13.Qc2 ed4 14.Nd4+=; 11.Qc2 Qc7 12.0-0 Rb8 13.Rfd1 e5 14.de5+=; 11.Qd2 e5 12.0-0 e4 13.Ng5 c5 14.Rad1+=; 11.Rb1 c5 12.0-0 cd4 13.ed4 Qc7 14.Re1=) 11...Qc7 (11...e5 12.Rb1 ed4 13.ed4 Nf8 14.bc6+=) 12.Qb3 (12.Rb1 e5+= (12...c5 13.e4 e6 14.Re1+=) 13.Qc2 ed4 14.Nd4+=; 12.Re1 c5 13.Qd3 cd4 14.Qd4+=) 12...e5 13.Rfd1 (13.Rad1 ed4 14.ed4+= (14.Nd4 Nc5+=)) 13...e4 (13...ed4 14.ed4= (14.Nd4 Nc5 15.Qc2=)) 14.Nd2+= Nf8 (14...c5 15.Qc2+=) 15.Rac1 (15.Rab1 Bf5+=) 15...Bf5 16.Na4 White intends c5 (16.h3 h6+=) 16...Rab8 (16...c5 17.Nf1+=) 17.Bc3 h5 (17...b6 18.bc6 Qc6 19.Rb1+=) 18.Qb2 (18.c5 Be6 19.Qc2 cb5 20.Bb5 Bd7+/–) 18...N8h7 (18...b6 19.d5 cb5 20.cb5+– (20.Bf6?! Bf6 21.cb5 Bb2 22.Rc7 Ba3+=)) 19.Nb3 (19.c5 d5+/–) 19...b6 (19...cb5 20.Ba5 b6 21.Nb6 bc4 22.Nc4+/–) 20.c5+– bc5 21.b6 Qd7 (21...Qe7 22.dc5 dc5 23.Na5+–) 22.dc5 (22.Ba5?! cd4 23.Nd4 Nd5+/–) 22...d5 23.Na5 Bg4 (better is 23...h4+–) 24.Nc6 (24.Bg4 hg4 25.Nc4 Ra8+–) 24...Be2 (better is 24...Qc6 25.Bb5 Qc8+/–) 25.Nb8+– (worse is 25.Qe2 Qc6 26.Rd4 Rb7–/+) 25...Qa4 26.Qe2 Rb8 27.Be5 Nd7 (27...Rd8 28.b7 Nd7 29.Bg7+–) 28.Bb8 Nb8 29.Rd5 Qa3 30.Rb1 Nf8 31.Qb5 (31.Qc4 Qa8+–) 31...Qa2 (31...Qa8 32.Rbd1 Qb7 33.Qe8+–) 32.Rdd1 Qe6 33.Rd8 Be5 34.Qe8 Qe8 35.Re8 Nc6 (35...f6 36.Rc8+–) 36.Re5! Ne5 37.b7 Nfd7 (37...Nc6 38.b8Q Nb8 39.Rb8+–) 38.b8Q (better is 38.Rd1 Kh7 39.Rd7 Nd7 40.c6+–) 38...Nb8 39.Rb8 Kg7 40.Rb4 (40.Rc8 Nc4+–) 40...Kf6 (40...f5+–) 41.Re4 (41.c6 Nc6 42.Rb6 h4+–) 41...Kf5 42.Rd4 Ke6 (42...Nc6 43.Rd5 Ke4 44.Rd6+–) 43.f4 (43.f4 Nd7 44.c6+–) 1–0. Basman,Michael J – Smith,Andrew Philip, Ch Great Britain, Torquay (England), 1998.

10.d4 h6 11.0-0 (11.Qd3 Re8 12.Rb1 e5 13.bc6 bc6 14.de5=; 11.Qa4 Re8 12.0-0 e5 13.Rad1 ed4 14.Nd4+=) 11...Re8 12.Rc1 Qc7 13.Qd3 e5 14.de5 +=.

5.c5 Qc5?? 6.ab4+– White launches an attack. 6...Ra1 7.bc5 Rb1 8.Qc2 Rb4 (8...Ra1!?+–) 9.Ba3+– Rh4 10.Nf3 Rh5 11.Be2 Nf6 (11...Rh6 12.Qb3 Nf6 13.Bb2+–) 12.d4 (12.g4 Ng4 13.Qa4 f5+–) 12...e6 (12...d6 13.0-0+–) 13.Ne5 Rh6 14.0-0 g6 (14...b5 15.Ra1+–) 15.e4 Be7 (15...Rh4 16.Bc1 Re4+–) 16.d5 (better 16.Bc1 Rh4 17.Bf3+–) 16...ed5 17.ed5 cd5 (17...Nd5!? 18.Bf3 Nc7+–) 18.Qa4+– 0-0 (better 18...Nc6 19.Bc1 Rh2 20.Kh2 Ne5+–) 19.c6?? (better 19.Qf4 Rh5 20.Bh5 Nh5 21.Qe3+–) 19...Nc6 20.Be7 (20.Bc1!? Rh2 21.Nc6 Rg2 22.Kg2 dc6 23.Bb2+=) 20...Ne7=+ (20...Ne5?? 21.Bf6 g5 22.Be5+–) 21.Ng4 Rh4?? (better 21...Ng4 22.Qg4 Re8=+) 22.Nf6+– Kg7 23.Ng4 (better 23.Qh4 Nc6 24.Bd3+–) 23...f5? (23...d6+–) 24.Qd4 Kf7 (24...Kg8 25.Nf6 Rf6 26.Qf6 Re4+–) 25.Ne5 Kf6 (25...Kg7 26.Qh4 Nc6+–) 26.Qh4 Ke5 27.Qe7 Kd4 28.Qf8 (28.Qe3) 28...d6 29.Qc8 (29.Qf6 Kc5 30.Rc1 Kb4 31.Qc3 Ka4 32.Ra1) 29...b5 (29...Ke5 30.Qh8 Ke6 31.Re1 Kd7 32.Qg7 Kc6 33.Rc1 Kb6 34.Qd4 Ka5 35.Ra1) 30.Qb8 (30.Qh8 Kc5 31.Rc1 Kb4 32.Qc3 Ka4 33.Ra1) 30...f4 31.Qd6 f3 32.Bf3 (32.Qf6 Kc5 33.Rc1 Kb4 34.Qc3 Ka4 35.Ra1) 32...b4 (32...Kc4 33.Qc6 Kb3 34.Rb1 Ka2 35.Qc2 Ka3 36.Qb3) 33.Qb4 (33.Rc1 b3 34.Qd5) 33...Ke5 34.Bd5! g5 (34...Kd5 Decoy theme: d5 35.Rd1) 35.f4 (35.Qe4 Kf6 36.f4 h6 37.Qe6 Kg7 38.Qf7 Kh8 39.Qg8) 35...Kf6 (35...Kd5 36.Rd1 Ke6 37.Rd6 Ke7 38.Ra6 Ke8 39.Ra7 gf4 40.Qe7) 36.fg5 (36.Qd6 Kg7 37.Qe5 Kf8 38.fg5) 36...Kg6 (36...Kg5 37.Qe7 Kh6 38.Qf6 Kh5 39.Bf3) 37.h4 (37.Qb6 Kg5 38.Qf6 Kg4 39.Bf3) 37...Kh5 (37...h6 38.Rf6 Kg7 39.Qe7 Kh8 40.Rh6) 38.g3 (38.Bf7) 38...h6 (38...Kg6 39.Qd6 Kh5 40.Bf3) 39.gh6 (39.Bf7) 39...Kh6 40.g4 (40.g4 Kg7 41.Qe7 Kh8 42.Rf8) 1–0. Markzela (1685) – sunnyandsammy2020 (1930), lichess.org, 2020.

5.c5 Qc7 6.Bb2= ba3 Black gets the initiative 7.Ra3 Ra3 8.Na3 e5 (8...d5 9.cd6 ed6 10.Nf3=+) 9.Nf3 (9.Nc4!? d6 10.cd6 Bd6 11.f4=) 9...f6=+ (9...Bc5? 10.Be5 Qd8 11.Bg7 Ba3 12.Bh8+–) 10.Nc4 (10.Qc2!?=+) 10...Bc5–/+ 11.Be2 (11.Nfe5 fe5 12.Qh5 Kf8 13.Qf3 Nf6 14.Be5=) 11...d5–+ 12.Na3 Qd6 (12...Bd6 13.Qc2–+) 13.Nc2 Ne7 14.0-0 0-0 (14...Bb6 15.d4 e4 16.Ba3–+) 15.d4–/+ White begins to deal mighty blows 15...Bb6 (better 15...ed4!? 16.Ncd4 Na6–+) 16.de5= fe5 17.Be5 (worse 17.Ne5 Bc7–/+) 17...Qg6?? (better 17...Qc5=) 18.Bb8+– Bh3 (18...Bf5 19.Nh4 Bc2 20.Ng6 Bd1 21.Ne7 Kf7 22.Rd1 Rb8 23.Nf5+–) 19.Bg3 Bg4 (19...Bf5 20.Ncd4 Bd4 21.ed4+–) 20.Nh4 Qe8 (20...Be2 21.Ng6 Bd1 22.Ne7 Kf7 23.Rd1 Ke7+–) 21.Bg4 (21.Bg4 Ba7 22.Be6 Kh8 23.Qg4+–) 1–0. Markzela (1795) – Tea_Rex_64 (1745), lichess.org, 2020.

5.c5 Qc7 6.Bb2 ba3 7.Na3 Ra5 8.d4 d6 9.Bc3 dc5 10.Ba5 Qa5 11.Qd2 Qd2 12.Kd2 cd4 13.ed4=.

5.c5 Qc7 6.Bb2 ba3 7.Na3 d5?? 8.Nf3?? (better 8.Nb5 cb5 9.Bb5 Kd8 10.Ra8 Qc5 11.Qb3+-) 8...Na6 9.Qc1 (9.Be5 Qd8 10.d4 f6=) 9...f6=+ 10.Be2 e5 11.d4 e4 12.Nd2 f5 13.0-0 Nf6 14.f3 Be7 15.fe4 (15.Qc3 0-0=+) 15...fe4-/+ 16.Qd1 0-0 17.Nc2 Be6 18.Bc3 h6 19.Ba5 Qd7 20.Bb6 Ng4 21.h3 Rf1 22.Qf1 (22.Bf1 Nf6=+) 22...Rf8-/+ 23.Ba6 (23.Qe1 Nf2 24.Bf1 Bh4-+) 23...Rf1 (23...ba6?! 24.Qa6 Nf2 25.Qe2=+) 24.Bf1 Nf6 25.Ra8 Kh7 26.Nb4 (26.Be2 g5 27.Rb8 g4-/+) 26...Nh5 27.Ra7? (27.g4 Bg4! 28.hg4 Qg4 29.Bg2 Nf4 30.ef4 Qd1 31.Nf1 Qd4 32.Kh1 Qb4-+) 27...Qc8 (27...Bh4 28.g4 Qf7 29.Nd3-+) 28.Kh2? (28.Ra1-+) 28...Bg5 29.Ra3 (29.Nc2 Qb8 30.Kh1 Qg3-+) 29...Qb8 30.Kg1 Qg3 31.Nc2 Bh3 (better 31...Bh4!? 32.Kh1-+) 32.Bc7 Qc7 33.gh3 Ng3 (33...Qg3!? 34.Bg2 Bh4 35.Ne4 de4 36.Ra2-+) 34.Bg2 (34.h4 Bh4 35.Ra2 Qc8-+) 34...Nf5 (better 34...Qf7 35.Ra1 Ne2 36.Kh1-+) 35.Nf1 Nh4 36.Ra7 Nf3 (better 36...Ng2 37.Kg2 Qf7 38.Ra1-+) 37.Kf2 (37.Bf3 ef3 38.Ne1-+) 37...Bh4 38.Ke2 Ng1 (38...Qf7 39.Kd1 Qg6 40.Bf3 ef3 41.Rb7-+) 39.Kd2 (39.Kd1 Qc8 40.Nd2 Nh3 41.Bh3 Qh3-+) 39...Qb8 (39...Qf7 40.Kc3 Ne2 41.Kb2-+) 40.Ra3 (40.Ra1 Qf8 41.Kc3 Qf2-+) 40...b5 (40...Qf8 41.Kc1-+) 41.Ra6 Qc8 42.Rb6 (42.Ra1 Qf5 43.Kc3 Qg5-+) 42...Nh3 43.Nb4 (43.Nh2-+) 43...Qg4 44.Bh3 Qh3 45.Kc2 (45.Ng3 Bg3 46.Nc2 Qf1-+) 45...Qf1 46.Nc6 Qe2 47.Kb1 Qd3 48.Kb2 Qe3 (48...Be1 49.Nb4 Bb4 50.Rb7 Bc3 51.Ka3 Qb1 52.Rb5 Qa1 53.Kb3 Qb2 54.Ka4 Qa2) 49.Rb7 Bg5 50.Ka2 (50.Nb4 Qd4 51.Kc2 Qc5 52.Kb1 Qb4 53.Kc2 Qc4 54.Kb2 Bf6 55.Kb1 Qb3 56.Kc1 Bg5) 50...Qd2 51.Kb3 e3 (51...Qd1 52.Kb2 Qc1 53.Kb3 Qb1 54.Kc3 Bc1 55.Rg7 Kg7 56.Ne5 b4) 52.Rb5 e2 53.Nb4 (53.Na7 Qd3 54.Ka4 e1Q 55.Rb1 Qeb1 56.Nc6 Qbb5) 53...Qd4 (53...e1Q 54.Nc2 Qb1 55.Ka4 Qbc2 56.Rb3 Qc4 57.Rb4 Qdb4) 54.c6 (54.Rb8 Qc4 55.Ka3 e1Q 56.Rh8 Kh8 57.Na2 Qa5 58.Kb2 Qaa2) 54...Qc4 (54...e1Q 55.Rb7 Qc4 56.Ka3 Qec3 57.Ka4 Qa1) 55.Ka4 (55.Kb2 Bc1 56.Kb1 Qb3 57.Kc1 e1Q) 55...e1Q 56.Rd5 (56.Ka5 Qef1 57.Nd3 Bd8 58.Ka6 Qc6 59.Ka7 Qf7 60.Rb7 Qfb7) 56…Qcb4 (56...Qeb4) 0-1. zembelek (2130) - Porfirios (1920), Rated Blitz game, lichess.org, 2013.

5.c5 Qc7 6.Bb2 ba3 7.Na3 Qd8 8.Qb3 (8.Nc4!? Ra1 9.Qa1+= (worse 9.Ba1 d6=+)) 8...Nf6 9.Bc4 (9.Bf6 gf6 10.d4 d6 11.cd6 e5 12.de5 fe5-/+) 9...e6-/+ 10.d4 Be7 (10...d6 11.cd6 Qd6 12.Nf3-/+) 11.f3 (11.Nf3 d6 12.cd6 Qd6=+) 11...0-0 12.e4 Na6 (12...d6 13.cd6 Qd6 14.Ne2-/+) 13.e5 (13.Nc2 Re8=) 13...Ne8 (13...Nd5 14.Ne2-/+) 14.Nc2=+ Nac7 15.Ra8 Na8 16.Ne2 (16.Qa4 b5 17.Bb5 cb5 18.Qa8 Qc7=) 16...Nac7 (16...b6 17.Qa4 Nec7 18.Bd3-/+) 17.0-0 Nd5 18.Rb1 (18.Ne3 f6 19.Nd5 ed5=+) 18...b5 19.cb6 Nb6 20.Bd3 Nd5 21.Nc3 f5 (21...Nf4 22.Ne4=+) 22.Na4 (22.Nd5 cd5 23.Qc3 d6=) 22...g6 (22...Nec7 23.Nb6=+) 23.Re1 (23.Ba3 d6=) 23...Ng7 24.Ne3 (24.Nc5 d6 25.ed6 Bd6=+) 24...Bh4 25.g3 (25.Re2 Nf4 26.Rc2 Nd3 27.Qd3 Qa5=+) 25...Be7 (25...Ne3 26.Re3 f4 27.gf4 Rf4 28.Qc2-/+) 26.Nc4 (26.Nd5 cd5 27.Qb6 d6=) 26...Nh5 Black plans f4 (26...f4 27.g4-/+) 27.Nd6 (27.Ra1 f4 28.g4 Ng7=) 27...Bd6-/+ 28.ed6 f4 29.g4 Nhf6 (29...Qh4 30.Qd1 Nhf6 31.Qe2-/+) 30.Nc5 (30.Ra1 Ne3-/+) 30...Ng4 (better 30...Ne3!?-/+) 31.fg4= Qh4 32.Be2?? (better 32.Re2 Ne3 33.Kh1=+) 32...f3 33.Bf3 (33.Bf1 f2 34.Kh1 fe1Q 35.Qf3 Rf3 36.h3 Rf1 37.Kg2 Qhg3) 33...Nf4 (33...Qe1 34.Kg2 Nf4) 34.Rf1 Nh3 35.Kg2 Nf4 36.Kh1 Rf6? (36...Qh3 37.Qd1 Nd5+-) 37.d5 Qh3 (37...Nd5 38.Bf6 Qf6 39.Be2+-) 38.Rg1 (better 38.Kg1!? Ne2 39.Be2 Rf1 40.Bf1 Qg4 41.Bg2 ed5+-) 38…Kf7 (38...Kf7 39.Ne4 Qh6 40.dc6 Nh3 41.Nf6 Qd2+-). ClayPigeons (2065) - varinova (2070), Rated Bullet game, lichess.org, 2020.

4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Qb6 4.a3).

4.c4 dc4 5.Bc4 a5 6.d4 =.

4.c4 dc4 5.Bc4 e6 6.Nc3 Nf6 7.Nf3 Nbd7 8.0-0 Be7 9.d4 0-0 10.Bd2 Qc7 11.Qb3 Nb6 12.Bd3 a5 13.Rfc1 Nbd7 14.ba5 Qa5 15.a4 Qh5 16.Ne2 Bd6 (16...Qd5 17.Qc2 Qd6 18.e4+/–) 17.Bb4 (17.e4!? e5 18.Ng3+–) 17...Bb4+= 18.Qb4 Nd5 19.Qd2 e5 (19...Re8 20.e4 N5f6 21.e5+/–) 20.Ng3+/– Qh6 ½–½. Krivoshapko,Alexander (2100) – Nikitin,Vitaly (2155), SF OCCC, 2007.

4.c4 Bf5 5.c5 Qc7 6.Bb2 Nd7 7.Nf3 e5 8.Be2 Ngf6 9.d4 e4 10.Nfd2 Be7 11.Nc3 h6 12.b5 0-0 13.a4 Rab8 (13...b6 14.cb6 ab6 15.Rc1=) 14.a5 b6 15.cb6 ab6 16.a6 c5 17.Nb3 Rbd8 (17...c4 18.Nd2=) 18.0-0 (18.dc5 Nc5 19.Nd4 Bg4+/–) 18...Bd6 19.g3 (19.dc5 bc5 20.Nd5 Nd5 21.Qd5 Be6+=) 19...Be6 (19...c4 20.Nd2=) 20.Na4 (20.f4 Bh3 21.dc5 Nc5+=) 20...c4= 21.Nd2 Nh7 (21...Bh3!? 22.Re1 Ra8=) 22.Nc3+= f5 23.Ba3 1–0. Krivoshapko,Alexander (2100) – Savostjanov,Igor, SF OCCC, 2007.

4.c4 Nf6 5.Bb2 (5.d4 Bg4 6.Nf3 e6=) 5...Nbd7 (5...c5 6.cd5 Nd5 7.Bc4=) 6.Nf3 a5 (6...c5 7.cd5 Nd5 8.Bc4=) 7.Qc2 (7.Bd4!? Qd8 8.b5=) 7...ab4+= 8.ab4 Ra1 9.Ba1 Qb4 10.cd5 (10.Bd4 b6+=) 10...Nd5 11.Nc3 N7f6 12.Bd3 Qa5 (12...Qg4 13.Nd5 Nd5 14.0-0+=) 13.0-0 Nb4 14.Qb1 Nd3 15.Qd3 e6 (15...Bg4 16.e4–/+) 16.Ne4 (16.Rb1 e5+=) 16...Ne4–/+ 17.Qe4 Qd5 (17...Qf5 18.Qc4–/+) 18.Qg4 f6 (18...Qf5 19.Qf5 ef5 20.Rb1–/+) 19.Bc3 (19.Bd4 Qf5 20.Qf5 ef5–/+) 19...Kf7 (19...Qd3 20.Ra1–/+) 20.Ra1 Be7 (20...Bd6 21.d4+=) 21.Ra8 (21.e4 Qd3+=) 21...Rd8 (21...Qf5 22.Qf5 ef5 23.d3–/+) 22.h3 (22.Ba5 Rd7+=) 22...Bd7 (22...Qd3 23.Ne1 Qg6 24.Qf3–/+) 23.Ra7 (23.Rd8 Bd8 24.e4 Qd3+=) 23...Rb8 24.Qa4 (24.d4 Kg8+=) 24...c5 (24...Qd3 25.Qg4–/+) 25.Qa3 (25.Qh4 Qd3–/+) 25...b5–+ 26.Qa6 (26.Qb2 Qd3–/+) 26...Qc6 (26...e5 27.e4 Qe6 28.Qa3–+) 27.Qa2 Rb7 (27...Qd6 28.d4–/+) 28.Ra6 (28.d3 Ra7 29.Qa7 Qd6–+) 28...Qd5 29.Qb1 (29.Qc2 b4 30.Bb2 Bb5–+) 29...b4–+ 30.Ba1 Qc4 (30...Bb5 31.e4 Qd3 32.Qd3 Bd3 33.Ra8–+) 31.Ra8–/+ b3 (31...Bd6 32.d4–/+) 32.Qh7–+ The mate threat is Qh5 32...Bf8?? (32...Qc1 33.Kh2 Bd6 34.g3 Bb8–/+) 33.Qh5 (33.Bf6 Qc1 34.Kh2 b2 35.Rf8 Kf8 36.Qg7 Ke8 37.Qg8) 33...Ke7= 34.Bf6 gf6 35.Qh7 Kd6 36.Ra6?? (36.Rf8 b2 37.Rf6 b1Q 38.Qb1 Rb1 39.Kh2–+) 36...Qa6–+ (36...Qa6 37.Qb1 c4–+) 0–1. Diederich,Hauke – Mueller,Bjoern Jakob (1675), DSSM WK2 Husum, 2002.

4.Nf3 a5 5.b5 Nf6 (5...Bg4 6.bc6 bc6 7.d4 e5 8.de5 Nd7 9.Qd4 Bf3 10.Qb6 Nb6 11.gf3 Rb8 12.Bd2+=) 6.Nc3 c5 7.Be2 Nbd7 8.0-0 e5 9.Bb2 Bd6 10.Nh4 a4 11.Nf5 0-0 12.f4 =.

4.Nf3 Nf6 5.Bb2 Bg4 (5...c5 6.Nc3 cb4 7.ab4 e6 8.Nb5 Nc6 9.Bf6 gf6 10.c3 Bd7 11.Nbd4 Nd4 12.Nd4=; 5...Bf5 6.Bd4 Qc7 7.Be5 Qb6 8.Nh4 Bg4 9.f3 Bc8 10.Bd4 Qd8 11.f4 a5 12.b5=) 6.c4 (6.Bd4 Qc7 7.Bf6 ef6 8.h3 Bd7 9.c4 a5 10.ba5 Be6 11.cd5 Bd5 12.Nc3=) 6...Nbd7 7.cd5 Nd5 (7...cd5 8.Be2 Bf3 9.Bf3 e5 10.Nc3 e4 11.Be2 Bd6 12.d3=) 8.Bc4 (8.Be2 a5 9.Nc3 N5f6 10.b5 Bf3 11.Bf3 cb5 12.Qe2=) 8...e6 (8...a5 9.h3 Bf3 10.Qf3 ab4 11.Bd4 Qc7 12.ab4=) 9.d3 (9.Bd4 Qd8= 10.h3 Bh5 11.d3 b5 12.Bd5=) 9...N5f6 (9...Bf3 10.gf3 a5 11.Bd4= Qd8 12.b5=) 10.Nbd2 (10.0-0 a5 11.Nbd2 Bd6= 12.Bd4=) 10...Be7 (10...Bd6 11.h3 Bf3 12.Nf3= (12.Qf3=)) 11.0-0 (11.h3 Bf3 12.Qf3 a5+=) 11...0-0 (11...a5 12.h3=) 12.Rb1 (12.h3+=) 12...Qd8 13.Qc2 (13.h3 Bh5=) 13...Rc8 (13...b5 14.Ba2=) 14.d4 a5 15.ba5 Bf3 (15...Qa5 16.Bd3=) 16.Nf3+= Qa5 17.Qb3 Rb8 18.a4 (18.Bd3 Rfd8+=) 18...Nd5 19.e4 N5b6 20.Ra1 Nc4 21.Qc4 Nf6 (21...Rfd8 22.Bc3 Qh5 23.Rfe1=) 22.Qc2 h6 (22...Rfc8 23.Rfd1=) 23.Rfb1 Rfc8 24.Bc3 Qh5 25.a5 Qg6 26.Re1 c5 27.Qe2 cd4 28.Bd4 Bc5 29.Be5 Ra8 30.Ra4 Rc6 (30...Nh5!?=) 31.Qb5+/– Ng4 32.Bg3 (32.Qb7 Bf2 33.Kf1 Rac8–/+) 32...Ra7 (32...Rac8 33.h3 Nf6 34.Kh2+/–) 33.h3 (33.a6 Qh5 34.e5 Rc7+–) 33...Nf6+/– 34.Bb8 Ra8 35.Qb7 Rca6 36.Bc7 (36.Ne5!? Qg5 37.Qc8 Bf8+/–) 36...R6a7+/– 37.Qc6 Bf2 38.Kf2 Rc8 39.Rc4 (39.Rc1 Rac7 40.Qc7 Rc7 41.Rc7 Ne4 42.Kg1 Ng3+=) 39...Rac7 (39...Rcc7 40.Qc7 Ne4 41.Kg1 Rc7 42.Rc7+/–) 40.Qc7+/– Rc7 41.Rc7 Ne4 42.Kg1 Ng5 43.Ne5 Nh3 (better is 43...Qh5!?+/–) 44.Kh2+– Qg5 45.Rc8 (45.Kh3?! Qh5 46.Kg3 Qg5 47.Ng4 h5 48.Rc8 Kh7=) 45...Kh7 46.Rh8! (46.gh3?? Qd2 47.Kg3 Qe1 48.Kf4 g5 49.Kf3 Qe5–+; 46.Kh3?! Qd2 47.Re4 Qa5+/–) 46...Kh8 47.Nf7 Kg8 48.Ng5 Ng5 49.a6 1–0. Zielinska,Marta (2415) – Myc,Marcin (2310), TCh–Poland, Lubniewice Poland, 2002.

4.Nf3 Bg4 5.h3 Bf3 6.Qf3 Nd7 7.Nc3 Ngf6 8.Qg3 e5 9.Bb2 c5 10.Na4 Qe6 11.Nc5 Bc5 12.bc5 Nc5 (better 12...0-0!?+=) 13.Bb5+/- Ke7 14.Qe5 (14.Be5 Rhc8 15.Qf4 a6+/-) 14...Qe5 15.Be5 Ke6 (15...a6 16.Be2+/-) 16.d4 Nce4 (16...Ncd7 17.Bf4+/-) 17.Bd3 (17.c4 Rac8 18.cd5 Nd5+-) 17...Nd6 (17...Rac8 18.Rb1 Nd7 19.Bh2+/-) 18.0-0 (18.g4 h6+-) 18...b6 19.a4 Nc4 (19...Rac8 20.a5 b5 21.a6+-) 20.Bc4+- dc4 21.Rfb1 Rhd8 (21...Rhg8 22.a5 Nd7 23.ab6 ab6 24.Ra8 Ra8 25.Bg7+-) 22.a5 ba5 23.Ra5 Ne8 24.Rb4 f6 25.Bh2 Nd6 (25...c3 26.d5! Ke7 27.Rc4+-) 26.Bd6 Rd6 27.Rc4 1-0. extremo (2125) - pawnraider (2095), gameknot.com, 2021.

4.Bb2 d6 5.Nf3 a5 6.b5 cb5 7.d4 (7.Nc3 Bd7 8.d4 f6=) 7...e4 8.Nfd2 d5 9.Nc3 Nf6 10.Bb5 Bd7 11.a4 Bb5 (11...Bb4 12.Be2=+) 12.Nb5= (worse 12.ab5 Bb4=+) 12...Nc6 13.c4 Bb4 14.0-0 (14.c5 Qd8+–) 14...Bd2 (14...0-0 15.cd5 Bd2 16.Qd2 Nd5 17.Nc3=) 15.Qd2 0-0 16.Ba3 Rfd8 (better 16...Rfe8!?+=) 17.c5+– Qa6 18.Nc7 Qd3? (better 18...Qc4 19.Na8 Ra8+–) 19.Qd3 ed3 20.Na8 Ra8 21.Rfd1 Ne4 22.Rd3 Nb4 (22...f5+–) 23.Bb4 ab4 24.Rb3 Nd2 (24...Ra7 25.Rb4 g5 26.f3+–) 25.Rb4 Ra7 (25...Kf8 26.Rb7 Nc4 27.Rd7+–) 26.f3 (better 26.c6 b6 27.Rb6 g5+–) 26...g6 (26...f5 27.Ra2 Nc4 28.e4+–) 27.Kf2 Nc4 28.Ke2 (28.e4 f5+–) 28...Kg7 (28...Na5 29.Kd3+–) 29.Kd3 (better 29.e4!? f5+–) 29...Na5 30.Kc3 (30.e4 Nc6 31.Rb6 Ne7+–) 30...Nc6 (30...f5 31.Rab1+–) 31.Rb6 Nd8 (31...h6 32.e4 de4 33.fe4+–) 32.a5 (32.Rd6 Ne6+–) 32...Ne6 (32...h6 33.e4 de4 34.fe4+–) 33.a6 (better 33.Rd6!? Kf6+–) 33...ba6 34.Raa6 Rc7 35.Rc6 Rb7 (35...Re7+–) 36.Rcb6 Rc7 37.Kd3 g5 (37...h6 38.Rd6+–) 38.c6 (38.Rd6 h6+–) 38...g4 (38...h6 39.e4 Nf4 40.Kc3+–) 39.Rb7 (39.fg4 Rc8+–) 39...Rc8 (39...gf3 40.gf3 Rc8 41.Rd7+–) 40.f4 (40.fg4 Nd8 41.Rbb6 Ne6+–) 40...h5 (40...Nd8 41.Rbb6 Ne6 42.Ra5+–) 41.Raa7 (better 41.Rd7 h4+–) 41...h4 (41...Nd8 42.Rc7 Nc6 43.Rf7 Kg6 44.Rg7 Kh6 45.Rh7 Kg6 46.Rag7 Kf6+–) 42.Rf7 Kg6 (42...Kg8 43.f5 Rc6 44.fe6 Re6 45.Rg7 Kf8 46.Rg4+–) 43.f5 Kg5 44.fe6 (44.fe6 h3 45.gh3 Rc6 46.e7+–) 1–0. FeegLood (2580) – igo1 (2320), lichess.org, 2015.

4.Bb2 d6 5.Nf3 Nf6 6.d4 e4 7.Nfd2 d5 8.c4 a5 9.b5 Be7 10.Nc3 0-0 11.Qb3 Be6 12.c5 Qc7 13.a4 Nfd7 14.Ba3 f5 (14...Re8 15.Be2=) 15.g3 (15.Be2 Rf6+=) 15...g5 Black prepares the advance f4 16.Be2 f4? (better 16...Nf6!?=) 17.gf4+– gf4 18.Nde4! fe3 (18...de4 19.Qe6 Double attack (19.Qe6 Pinning; 19.Qe6 Deflection; 19.Qe6 Decoy)) 19.fe3 Bh4 (19...Kh8 20.Ng3+–) 20.Kd2+– Kf7? (20...Nf6+–) 21.Raf1 Ke7 22.Rf8 (22.b6!? Qc8 23.Nd6 Qd8+–) 22...Nf8 23.Nd6 Nbd7 24.Rg1 Ng6 (24...Kd8 25.Bd3+–) 25.Bg4 (25.b6 Qb8+–) 25...Nf6 (25...Bg4 26.b6 Qb8 27.Rg4+–) 26.Be6 Ke6 27.Qc2 Qg7? (27...Rb8+–) 28.Qf5 Ke7 29.Qh3 Qh6 (29...Kf8 30.Rg6! Qg6 31.Qh4 Rb8+–) 30.Nf5 (30.Nf5 Kd8 31.Nh6 Ne4 32.Ne4 de4 33.Qe6+–) 1–0. FeegLood (2745) – smurf42 (2615), lichess.org, 2015.

4.Nf3 (4.Bb2 Qc7=) 4...e4 5.Nd4 Nf6 6.c4 (6.d3 d5=) 6...c5 (6...a5 7.ba5 Qa5 8.Qc2=) 7.bc5 Bc5 8.Nb3 Be7 (8...d6 9.Bb2 Nbd7 A) < 10.Nc5 Qb2 (10...Qc5?! 11.d3=; 10...Nc5?! 11.Bf6 gf6 12.f3=; 10...dc5?! 11.Qc2=) 11.Nd7 Qa1 (< 11...Kd7 12.Nc3+=; 11...Nd7?! 12.Nc3=; 11...Bd7?! 12.Nc3=) 12.Nf6 Qf6–/+; B) 10.f3 ef3 11.d4+=) 9.Nc3 d6 (9...Qe6 10.d3+=) 10.Qc2 Nc6 (10...Bf5 11.f3+=) 11.Rb1+/– Bf5 12.Nd5 (12.f3 Rc8+/–) 12...Qd8+= 13.Nf6 (13.f3 Nd5 14.cd5 Ne5+=) 13...Bf6= 14.d4 ed3 15.Bd3 Bd3 16.Qd3 Ne5 (16...Rc8 17.Nd2 b6 18.0-0=) 17.Qd5 Qc7 (17...0-0 18.0-0=) 18.Na5 (better is 18.Nd2 Rb8 19.Bb2+=) 18...Nd3 (better is 18...Rb8!?+=) 19.Ke2+– Nc5 (19...Nc1 20.Rhc1 (20.Rbc1?! Rb8+=) 20...Rb8 21.Nb7+–) 20.Nb7 0-0 21.Qd6 (21.Nd6?! Rad8 22.Rd1 Na4=+) 21...Qd6 22.Nd6 Rfd8 23.Nb5 Ne4 24.f3 Nc5 25.Rd1 a6 26.Nc7 Rac8 27.Rd8 Rd8 28.Nd5 Be5 29.Ne7 Kf8 30.Nc6 Re8 31.Ne5 Re5 32.Bd2 Rh5 33.Bb4 Ke8 34.Bc5 Rc5 35.Kd3 Rh5 36.h3 Rg5 37.g4 Ra5 38.Rb3 h5 39.Kd4 Ke7 40.c5 Ke6 41.Rc3 Ra4 42.Rc4 Ra3 43.c6 Ra1 44.c7 Rd1 45.Ke4 (45...Kf6 46.c8Q Rd7 47.Qc5 Rd5 48.Qd5 hg4 49.Rc6 Ke7 50.Qd6 Ke8 51.Rc8) 1–0. Nokarookoff – RageofKlugman, ChessWorld.net, 2006.

4.Bb2 a5 5.c4 ab4 6.c5 Qc7 7.ab4 Ra1 8.Ba1 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.c4 ab4 5.c5 Qc7 6.ab4 Ra1 7.Ba1 Nf6 8.e3).

4.Bb2 a5 5.Nf3 ab4 6.Bd4 Qc7 7.ab4 Ra1 8.Ba1 d6 9.c4 e5 10.d4 e4 11.Nfd2 Be7 12.Nc3 Bf5 (12...d5 13.Qb1=+) 13.Be2 0-0 (better 13...d5!?=) 14.g4+= Bg6 (14...Bd7 15.g5 Ne8 16.Nde4+–) 15.h4+– d5 16.h5 Bb4 (16...Bh5 17.gh5 (17.Rh5?! Nh5 18.gh5 Bb4=) 17...Bb4 18.Qa4+–) 17.g5 (17.hg6!? fg6 18.g5+–) 17...Nh5+– 18.Bh5 Qa5 19.Qc1 Nd7 (19...Bh5 20.Rh5 b5 21.cb5+–) 20.Bg4 Nb6 21.c5 Ra8 22.Nb3 (22.Bb2 Nc8+–) 22...Qa3 23.Qa3 (23.Qc2!? Nc4 24.Ke2+=) 23...Ra3= 24.cb6 Rb3 25.Kd2 f6 (25...Ba5!?=) 26.gf6 (26.Kc2 Ra3 27.gf6 gf6+–) 26...gf6 (26...Ba5 27.Be6 Kf8 28.Kc2 Rb6 29.Bb2 Bc3 30.fg7 Kg7 31.Kc3+=) 27.Bc8 (27.Kc2 Ra3 28.Bc8 Bc3 29.Bc3 Ra2 30.Bb2+–) 27...Ra3 (better 27...Ba5 28.Bb7 Rb6+–) 28.Bb7?? (28.Rb1 Ra2 29.Kc1 Ra1 30.Ra1 Bc3 31.Bb7+–) 28...Ra2=+ 29.Kc1 Ra1 30.Nb1 Ba5 (30...Be8 31.Bc8=+) 31.Bc6= Bb6 32.Bd5 Kg7 33.Kb2 Ra5 34.Nc3 Bc7 (better 34...f5!?=) 35.Be4+– f5 36.Bd3 f4 (36...h5 37.Nb5 Bb8 38.Bc4+–) 37.Kc2 fe3 38.fe3 Bd6 39.Rg1 Be7 40.Bg6 hg6 41.Kd3 Rh5 42.Rg4 Rh3 43.Ne4 Kh6 44.Nf2 Kh5 (44...Rf3 45.Ke2 Rf8 46.Rg1+–) 45.Rg6 (45.Re4 Rf3+–) 45...Re3 46.Ke3 Kg6 47.Ke4 Bf6 48.d5 Be7 49.Nd3 Kf7 50.Nf4 Ke8 51.Ne6 Kd7 52.Nd4 Kd6 53.Nf5 Kd7 54.Ne3 Kd6 55.Nc4 Kd7 56.Ne5 Kd6 57.Nd3 Kd7 58.Ke5 Bd6 59.Kf5 Be7 60.Ke4 Bd6 61.Ne5 (better 61.Kd4+–) 61...Be5= 62.Ke5 Ke7 63.Kd4 Kd7 64.Ke4 Kd6 65.Kd4 Kd7 66.Ke4 Ke7 67.Ke5 Kd7 68.Ke4 ½–½. FeegLood (2760) – smurf42 (2600), lichess.org, 2015.

4.Bb2 a5 5.Nf3 ab4 6.Bd4 e6?? (better is 6...Qd8=) 7.Bb6+– 1–0. Benassi,Aspasio – Pleschke,Helmut, internet, 2001.

4.Bb2 d5 5.h3 (5.Nf3 Nbd7 6.c4 (6.Be2 e6 7.c4 dc4 8.Bc4 a5 9.Bd4 Qc7) 6...a5 (6...e6 7.c5 Qc7 8.d4 b6 9.Be2 Be7) 7.c5 Qc7 8.d4 b6 9.Bd3 Ba6) 5...Bf5 (5...c5 6.Bc3 (6.Nf3 a5 7.Bf6 Qf6 8.Nc3 e6 9.bc5 Bc5) 6...cb4 (6...Nc6 7.Bf6 ef6 8.Nc3 Qd8 9.bc5 Bc5) 7.ab4 Ne4 8.b5 Nc3 9.Nc3 e6; 5...Nbd7 6.Nf3 (6.c4 e6 7.Nf3 Be7 8.d4 Qc7 9.Nc3 0-0) 6...e6 (6...c5 7.Bc3 cb4 8.ab4 Ne4 9.b5 Nc3) 7.c4 Be7 8.d4 Qd8 9.Bd3 dc4) 6.Ne2 (6.g4 Bg6 7.h4 h6 8.h5 Bh7 9.c4 a5) 6...e6 (6...c5 7.Ng3 (7.Bc3 Nbd7 8.bc5 Qc5 9.Nd4 Bg6) 7...Bg6 8.h4= h5 9.Ra2 cb4; 6...Nbd7 7.Ng3 Bg6 8.h4 h5 9.c4 e6) 7.Bd4 (7.Ng3 Bg6= 8.h4 h6 9.h5 Bh7) 7...Qd8 (7...Qc7 8.Bf6 gf6 9.Ng3 Bg6) 8.d3 (8.Ng3 Bg6 9.h4 h5) 8...Bd6 (8...a5 9.ba5 Qa5) 9.g4 Bg6 10.g5 (10.f4+=) 10...Nfd7 (better is 10...Nh5!?+=) 11.Bg7= Rg8 12.Bh6 Ne5 (12...a5 13.ba5 Qa5 14.c3=) 13.Bg2 (better is 13.Nf4!?+/–) 13...f6+= 14.h4 Nbd7 (14...Ng4 15.Nd4 Nh6 16.gh6+=) 15.Nec3 (15.Nd4!?+/–) 15...Qe7 (15...Nf7 16.Bh3 Nh6 17.gh6+=) 16.Nd2 (16.f4 Nf7 17.gf6 Nf6=) 16...0-0-0 (16...Nf7 17.Rg1+=) 17.Nf3 (17.gf6 Nf6 (17...Qf6 18.Bg5 Nd3 19.cd3 Qc3 20.Bd8 Kd8 21.Bf1=) 18.Bg5 Nf7=) 17...Ng4 18.Rf1 (18.b5 Nh6 19.bc6 bc6 20.gh6 Bh5+=) 18...Nh6–/+ 19.gh6 e5 (better is 19...Bd3 20.cd3 Rg2–/+) 20.d4? (20.Bh3 Bh5 21.e4 d4+=) 20...ed4?? (20...Bh5 21.Bh1 e4 22.b5–+) 21.Nd5? (better is 21.Nd4 Be5 22.Rg1+=) 21...cd5–+ 22.Nd4 Be5 (22...Be4 23.Be4 Qe4 24.Qf3–+) 23.c3? (better is 23.Bd5!? Bf7 24.Bf7 Qf7 25.c3–+) 23...Nb6–+ 24.Bh3 (24.h5 Be8 25.Rg1 Kb8–+) 24...Kb8 25.Rg1 Bc2! 26.Qc2 (26.Qc2 Rg1; 26.Nc2 Bc3 (26...Rg1)) 26...Rg1 27.Bf1 Rc8 28.Nf3 (28.Ne2–+) 28...Bc3 29.Ke2 Ba1 30.Qd1 (30.Qb1 Rh1 31.Qa1 Rc2 32.Nd2 Nc4–+) 30...Rf1! 31.Qf1 (31.Qf1 Rc2; 31.Kf1 Bb2) 31...Bb2 (31...Rc2!? 32.Kd1 Qe4 33.Ne1–+) 32.Qg1 (32.Qb1 Na4 33.Qf5 Qe4 34.Qe4 de4–+) 32...Rc2 33.Nd2 Bc3 (better is 33...Qe4! 34.Qg8 Nc8 35.Qg1–+) 34.Qg8 (34.Kd3 Ra2 35.Qg3 Qe5 36.Qe5 Be5–+) 34...Kc7 (34...Nc8!? 35.Kd3 Ra2 36.Qg3 Be5 37.Qg1–+) 35.Kd3 Rd2 36.Kc3 Rf2 37.Kd3 Qe4 0–1. novice1234 – Bull_Dog_Baz, ChessWorld.net, 2009.

4.c4 c5 5.bc5 Qc5 6.d4 Qa5 7.Bd2 +=.

4.c4 d5 5.c5 Qc7 6.Qc2 e5 7.Nf3 Bg4 8.Bb2 Bf3 9.gf3 Nbd7 10.Nc3 g6 11.h4 Bg7 12.a4 0-0 13.Ne2 Nh5 14.0-0-0 (better is 14.a5!?+=) 14...a5–+ 15.Bc3 ab4 16.Bb4 Ra7 17.Nc3 Rfa8 18.a5 Nhf6 19.d4 Ra5 20.Ba5 Qa5 21.Bd3? (better is 21.Kd2–+) 21...ed4 22.ed4 (22.Nb1–+) 22...Bh6 23.Kb2 (23.Rd2 Qa1 24.Nb1–+) 23...Qa3 24.Kb1 Qa1 0–1. combijack (1830) – daletedoy (1765), gameknot.com, 2012.

4.c4 d6 5.Bb2 a5 6.b5 d5 7.Bd4 c5 8.Bb2 Bf5 9.d4 e6 10.Nc3 Nbd7 11.Nf3 Rc8 12.Na4 Qc7 13.dc5 Nc5 14.b6 Qc6 15.Nc5 Bc5 16.Ne5 (better is 16.Bf6 gf6 17.cd5 Qb6 18.Bd3 Bd3 19.Qd3+=) 16...Qb6–/+ 17.Qa4 (17.Ra2 0-0–/+) 17...Kf8 (better is 17...Ke7 18.Qb5 Qb5 19.cb5 Bd6–+) 18.Bc3? (18.Qd7 Nd7 19.Nd7 Ke7 20.Nb6 Bb6 21.cd5 f6+=) 18...Bd6?? (18...Be3 19.Be2 Bd4 20.Rc1 Bf2 21.Kd1–+) 19.Ba5?? (better is 19.Be2–/+) 19...Qb2–+ 20.Nd7 Nd7 21.Qd7 (21.Rd1 Ne5 22.cd5–+) 21...Qa1 22.Ke2 Qa2 (better is 22...Bd3 23.Kd3 Qd1 24.Kc3 Qc1 25.Kb3 dc4 26.Bc4 Qc4 27.Kb2 Qe2 28.Bd2 Qd2 29.Ka1 Qc3 30.Kb1 Qb3 31.Ka1 Qa3 32.Kb1 Qb3 33.Ka1 Be5 34.Qd4 Ra8) 23.Kf3 (23.Bd2 Qc4 24.Ke1–+) 23...Be4 24.Kg4 h5 25.Kh3 Bf5 26.g4 hg4 27.Kg2 Rh2! 28.Rh2 (28.Rh2 Be4 Mate attack) 28...Be4 29.Kg1 Bh2 30.Kh2 Qf2 31.Bg2 Qg2 0–1. Kotula,Konrad (1725) – Brzezinski,Mateusz (1845), Bydgoszcz op U20 Poland, 2008.

4.c4 d6 5.Nc3 g6 6.Bb2 Bg7 7.Nf3 0-0 8.Be2 Bd7 9.h4 c5 10.Nd5 Nd5 11.Bg7 Kg7 12.bc5 Qc5 13.cd5 Qd5 14.Ng5 Qg2?? (better is 14...Nc6–/+) 15.Bf3+– Qh1 16.Bh1 Bc6 17.Bc6 Nc6 18.Qb3 Rab8 19.Ke2 h6 20.Qc3 Kg8 21.Nf3 Rfc8 22.Qb3 a6 23.Rg1 Kg7 24.h5 g5 25.Nh4 e6 26.Nf3 (better is 26.f4!? b5+–) 26...b5 27.Qb2 f6 28.Qb1 f5 29.Nh4 Ne7 30.Nf3 Rc4?? (30...Nc6 31.e4 Ne7+–) 31.Qb2+– e5 (31...Kf7 32.Rg5! e5+–) 32.Ne5! de5 33.Qe5 (33.Qe5 Kf7 34.Qb8+–) 1–0. combijack (1720) – daktari (1695), gameknot.com, 2010.

4.Nf3 g6 5.Bb2 Bg7 6.c4 c5 7.b5 (7.Nc3 0-0+=) 7...a6 (7...0-0 8.Bd3=) 8.a4 (8.g4 h6 9.Nc3 ab5= (9...Ng4?? 10.Nd5 Qd6 11.Bg7+–)) 8...ab5= 9.ab5 Ra1 10.Ba1 0-0 11.Nc3 e6 (11...d6!?=) 12.Be2+= d5 (12...Qd8 13.0-0+=) 13.Na4+– Qa7 14.b6 Qa8 15.Nc5 dc4 16.Bc4 Qa5 17.Na4 (17.Nd3 Qb6 18.0-0 Nc6+–) 17...Bd7= 18.Bc3?? (better 18.Bb3=) 18…Qa4–+ (18...Qa4 19.Qa4 Ba4–+) 0–1. Sebesta,Petr – Cieslak,Wiktoria, Orlova Open, 2017.

4.Nf3 g6 5.c4 d6 6.Nc3 Bg7 7.Bb2 Bf5 8.h3 0-0 9.Be2 Nbd7 10.Nd4 Be6 11.Ne6 fe6 12.0-0 d5 13.c5 Qc7 14.Qc2 e5 15.Rac1 e4 16.Qb3 Kh8 17.a4 b6 18.cb6 Qb6 (worse is 18...Nb6 19.a5 Nbd7 20.Nd5+–; worse is 18...ab6 19.Nd5 Nd5 20.Bg7 Kg7 21.Qd5 Qh2 22.Kh2 cd5 23.Rc7+–) 19.a5 Qb8 20.Na4 Qd6 21.Bd4 Rfb8 22.Nc5 e5 23.Nd7 Nd7 24.Bc5 Nc5 25.bc5 Qe7 (worse is 25...Rb3 26.cd6 Rb2 27.Rc6 Rd2 28.d7+/–) 26.Qa4 Qc7 27.a6 Rb2 28.Rb1 Rab8 (worse is 28...Rd2 29.Bg4 Rb8 30.Rb8 Qb8 31.Qc6+=) 29.Rb2 Rb2 30.Rd1 Bf8 31.Qa3 Qb8 32.Qc3 Bg7 33.Bg4 d4 34.Qc4 Rb4 35.Qf7 Qf8 36.Qa7 Rb5 37.Rc1 (37.Qc7 h5 38.Bd7+– (38.Qc6?! Rc5 39.Qe4 hg4+=)) 37...Qe8?? (better is 37...Rb2 38.Bd7 Rd2+=) 38.Bd7+– Qe7 39.Qa8 Bf8 40.Bc6 Rc5 (40...Rb2+–) 41.Rc5 Qc5 42.a7 1–0. combijack (1760) – daktari (1740), gameknot.com, 2011.

5.d4 d6 =.

5.d4 Bg7 =.

6.Qc2 0-0 7.Ne2 a5 8.ba5 Qa5 9.Ng3 b5 10.cb5 cb5 11.Be2 Bb7 12.0-0 Rc8 13.Qb3 Na6 14.Qb5 Qb5 15.Bb5 Nc5 16.Nc3 Nb3 17.Rad1 Ba6 18.a4 ½–½. Olsson,Conny (2250) – Rothen,Hakan (2375), SWE–chT, 2005.

6.Nc3 0-0 7.c5 Qc7 8.d4 d5 9.cd6 Qd6 (9...ed6 10.Nf3=) 10.Nf3 (10.Qf3 Bg4 11.Qg3 a5=) 10...Bg4 11.Be2 Nbd7 (11...Rd8 12.0-0=) 12.0-0 Rfd8 13.Qb3 (13.Qc2 a5=) 13...Bf3 (13...e5 14.Rfd1 e4 15.Ng5+/–) 14.Bf3+= e5 15.Rfd1 ed4 (15...Qe6 16.d5 cd5 17.Nd5+=) 16.Rd4+/– Qc7 17.Be2 Ne5 18.h3 (18.Rad1 Rd4 19.Rd4 Rd8+=) 18...Rd4= 19.ed4 Ned7 20.Bf3 (20.Bc4 Nb6=) 20...Nb6 (20...Qd6 21.b5=) 21.b5 (21.d5 Nbd5 22.Nd5 Nd5 23.Bg7 Kg7 24.Bd5 cd5 25.Qd5 Rd8=) 21...Rd8= 22.bc6 bc6 23.Rc1 Bh6? (23...Qd6 24.Qc2=) 24.Rc2 (24.Nb5 Qf4 25.Na7 Nbd5 26.Nc6 Rd7+–) 24...Qe7 (24...Qd6!?+=) 25.Ne2+/– Rc8 (25...Nfd5 26.Rc6 Bg7+/–) 26.Bc1 (better is 26.Bc6!? Nfd5 27.Qf3+/–) 26...Bc1+= 27.Rc1 Nbd5 28.Qa4 (28.Nc3 Re8+=) 28...Qb7 (28...Qd7 29.Rc5+=) 29.g3 (29.Qc2 Qd7+=) 29...Kg7 (29...Qd7 30.Nc3+=) 30.Kg2 Qb6 (30...Qd7 31.Rc5+=) 31.Rc5 Rc7 32.Qc2 Qb7 33.Nc3 (33.Kg1 Nd7 34.Rc4 Qb5+=) 33...Nd7?? (better is 33...Re7+=) 34.Nd5+– (34...Nc5 35.Nc7 (< 35.Qc5 cd5 36.Qd5 Qd5 37.Bd5 Rd7–+) 35...Qc7 36.Qc5+–) 1–0. Steffens,Olaf (2275) – Schlaeger,Uwe (2200), BL2–Nord, 2001.

6.Bd4 Qc7 +=.

6.Nf3 0-0 7.c5 Qc7 8.d4 d5 9.cd6 ed6 (9...Qd6 10.Bd3=) 10.Nc3 (10.Bd3 Be6+=) 10...Re8 (10...Bf5 11.Be2=) 11.Be2+= Bg4 12.0-0 Nbd7 13.h3 (13.Qc2 Bf5 14.Bd3 Bd3 15.Qd3 d5=) 13...Bf3 (13...Be6 14.Qc2=) 14.Bf3 Nb6 (14...d5 15.Be2=) 15.Qb3 (15.b5 d5+=) 15...a5 (15...d5 16.Be2=) 16.e4 (16.ba5 Ra5 17.Rfb1 d5+=) 16...ab4 (16...a4 17.Qc2+=) 17.ab4 Nfd7 18.Rfd1 White prepares d5 18...Ra1 19.Ba1 Nf8 (19...d5 20.ed5 Bd4 21.Nb5 Bf2 22.Kf2 cb5 23.d6+/–) 20.d5 (20.b5 Ne6 21.Qb4 Ng5=) 20...Nfd7 21.dc6 (21.b5 Ne5+=) 21...bc6 22.b5 Nc5 23.Qb4 Be5 24.bc6 Qc6 White gets strong play along the open b–file. 25.Qb5 Qb5 26.Nb5 Ba1 (26...Ra8 27.Bd4=) 27.Ra1 Ne4 28.Ra6 Nd2? (28...Nc4 29.Be4 Re4 30.Nd6 Nd6 31.Rd6=) 29.Rb6 Re1 30.Kh2 Nf1 31.Kg1 ½–½. Steffens,Olaf (2275) – Sell,Achim (2250), BL2–Nord, 2001.

6.Nf3 c5 7.d4 d6 8.Qa4 Bd7 9.b5 =.

4.Ba3!? Adam.

4.c3 Qb6 5.Na3 d5 6.Nf3 Bg4 7.Rb1 Qc7 8.h3 Bf3 9.Qf3 Nf6 10.c4 e6 11.Bb2 Nbd7 12.cd5 ed5 13.Bd3 Ne5 14.Qf5 Nd3 15.Qd3 Be7 16.0-0 0-0 17.Rfc1 Qa5 18.Qc2 Ne4 19.d4 Qd2 20.Rd1 Qa5 21.Rd3 (21.Rdc1 f5 22.f3–+) 21...f5 22.f3 Ng3 23.Bc3 Qc7 24.Be1 Bd6 25.Rdb3 Rab8 26.Bg3 Bg3 27.f4 Bh4 28.Nb5 Qe7 29.Na3? (29.Na7!? Ra8 30.Rb7 Qe3 31.Kh1 Qd4 32.Rd1 Qf4 33.Qc6+=) 29...g5 30.Qd2 Rf7 31.Kh2 gf4 32.ef4 Rg7 33.g3? (33.Nc2 Re8 34.Re3 Qd8–/+) 33...Bf6 (33...Bg3 34.Rg3 Rg3 35.Kg3 Qa3 36.Kh4 Qe7 (36...Qa4 37.Rg1 Kf7 38.Qd3 Qd4 39.Qd4+–) 37.Kg3 Kh8–+) 34.Nc2 Re8 35.Re3 Qd7 (better is 35...Qf8!?–/+) 36.Rb7= Qb7 37.Re8 Kf7 38.Qe2 Kg6 39.g4 Re7 40.gf5 Kf5? (40...Kh6!? 41.Re7 Qe7 42.Qe7 Be7+/–) 41.Qg4 (better is 41.Ne3!? Kf4 42.Qf2 Ke4+–) 41...Ke4 42.Re7?? (better is 42.Rf8 Qb3 43.f5 (43.Rf6 Qc2 44.Kg3 Kd4–+) 43...Kd3 44.Qd1 (44.Rf6 Qc2 45.Kg3 Re4–+) 44...Kc3 45.Rf6 Qc2 46.Qc2 Kc2 47.Rc6 Kd3 48.f6+/–) 42...Qe7= (42...Be7 43.Qe2 Kf5 44.Qe5 Kg6 45.f5 Kf7 46.Qh8 Bd6 47.Kg2+=) 43.Qg3 ½–½. Estevez,Eric (1980) – Alard,Francis, Provence–ch access Vitrolles, 2000.

4.a3 ab4 5.cb4 e5 6.Bb2 =.

4.a3 d5 5.d4= ab4 6.cb4 Na6 7.Bb2 Bf5 8.Nf3 h6 (8...Nf6 9.Be2=+) 9.Bd3= Bg4 (9...Bd3 10.Qd3 e6 11.0-0=) 10.Nbd2 e5 (10...Nf6 11.0-0+=) 11.de5+/– c5 12.h3 Bd7 13.Bc3 cb4 14.ab4 (14.Bd4 Nc5 15.Qb1 Qe6 16.Bc5 Bc5 17.ab4 Ra1 18.Qa1 Bb4 19.Qa8 Ke7 20.Qb7 Bc3+–) 14...Bb4 15.Qb3 Bc5 16.e6 Ne7?? (16...Qe6 17.Bg7) 17.ed7+– Kd7 18.Qa4 Ke6 19.Qg4 (19...f5 20.Qg7+–) 1–0. Froemmel,Andreas – Klugmann, corr SOK–89–38, 1989.

4.Ba3 ab4 5.Bb4 c5 =.

4.Qb3 ab4 5.cb4 e6 6.Bb2 Nf6 (6...Bb4?? 7.Bg7 d5 8.Bh8+–) 7.b5 c5 8.d3 d5 9.Nf3 Be7 10.a4 0-0 11.Nbd2 Nbd7 12.Qc3 Ne8 13.Qc2 Bf6 14.d4 c4 15.e4 Be7 16.e5 Qa5 17.Be2 Bb4 18.Bc1 (18.0-0 c3 19.Nb3 cb2 20.Na5 ba1Q 21.Ra1 Ba5+=) 18...Nc7–/+ 19.Ng5? (better is 19.0-0!?–/+) 19...g6–+ 20.h4 (20.0-0 Nb5! 21.Ndf3 Nb6–+) 20...Bc3 21.Bb2 Bb2 22.Qb2 c3 23.Qc2 cd2 24.Kd1? (24.Qd2 Nb6 25.Qa5 Ra5–+) 24...f6 (better is 24...Nb5 25.Bb5 Qb5 26.ab5 Ra1 27.Kd2 Rh1 28.g3–+) 25.h5 (25.ef6 Nf6 26.h5 gh5 27.Rh5–+) 25...fg5 26.hg6 Rf5 (better is 26...h6 27.g7 Rf5 28.Bd3 Kg7 29.Bf5 ef5 30.Qd3 Nb5 31.Kc2–+) 27.Rh7 ½–½. Isler,Benjamin (1700) – Schulz,Gerhard (1855), 28th Kiel Open, 2015.

4.a4 e5 5.Nf3 Bd6 6.Ba3 Nf6 7.a5 Qc7 8.c4 e4 9.Nd4 dc4 10.Bc4 0-0 11.Nc3 Re8 (11...Bh2 12.Ne4 Nbd7 13.Bd3 Ne4 14.Be4+/–) 12.h3 Nbd7 13.Nf5 Bf8 14.d4 ed3 15.Bd3 Ne5 16.Qe2? (16.0-0!?+=) 16...Nd3 17.Qd3 Qe5 18.Nd4 Qg5 19.g4 Nd5 20.Nd5 Qd5 21.Ke2 Bd7 22.Rac1 Rad8 23.Qc4 Bg4 24.hg4 Qd4 25.Rhd1 Qc4 26.Rc4 Rd1 27.Kd1 Rd8 28.Ke2 a6 29.Bb2 f6 30.Bc3 Kf7 31.f4 g6 32.f5 gf5 33.gf5 Rd5 34.e4 Rb5 35.Rd4 Ke8 ½–½. Parry,Matthew (1870) – Meade,Philip J (2055), BCF–chT3, 2008.

4.d4 Bf5 5.Nf3 Nf6 6.Be2 Nbd7 7.0-0 e6 8.a4 a6 9.Ba3 Be7 10.Nbd2 0-0 11.Qb3 Ne4 12.h3 Nd2 13.Nd2 e5 14.b5 Ba3 15.Ra3 ab5 16.ab5 Ra3 17.Qa3 c5 18.dc5 Qc5 19.Ra1 Rc8 20.Qc5 Nc5 21.c4 d4 22.ed4 ed4 23.g4 Be6 24.Bf3 b6 25.Kg2 g6 26.Kh2 h6 27.Kg3 g5 28.Bc6 Kg7 29.f4 gf4 30.Kf4 Rd8 31.Ra6 Rb8 (31...Na6? 32.ba6 Bd7 33.Be4+–) 32.Ke5 Bd7? (32...h5 33.gh5 Bh3 34.Kd4 Rd8 35.Ke3 Rd3 36.Ke2 Bg4 37.Bf3 Rd2 38.Kd2 Bf3 39.Rb6 Bh5 40.Ke3+/–) 33.Kd6 (33.Bd7!? Nd7 34.Kd6+–) 33...Bc6+/– 34.Kc6 1–0. Shao Shuai – Lyell,M (2285), FSIMA August, Budapest HUN, 2009.

4.Nf3 Nf6 5.Be2 Bf5 6.d4 e6 7.a3 Bd6 8.0-0 0-0 9.Nbd2 Nbd7 10.c4 Qd8 11.c5 Bc7 12.Nh4 Be4 13.Ne4 Ne4 14.Nf3 e5 (14...Nc3 15.Qd3 Ne2 16.Qe2=) 15.Qc2 ed4 16.ed4 Re8 17.Bd3 Ndf6 18.Bg5 (18.Rb1 Qb8+=) 18...Ng5 19.Ng5 h6 (19...Ne4 20.Nf3= (worse 20.Ne4 de4 21.Bc4 Qd4–/+)) 20.Nf3+= a6 (20...Ne4 21.Rfe1 f5 22.Ne5+=) 21.Rae1 (21.Rfe1 Re1 22.Re1 a5+=) 21...Bf4 (21...Re1 22.Re1 Qf8 23.Qc1+=) 22.g3 Bc7 23.Re8 Qe8 24.Re1 Qf8 25.Ne5 Be5 26.Re5 Nd7 27.Re2 Re8 28.f4 Re2 29.Qe2 Qd8 30.Kf2 Kf8 31.Kf3 Qe7 32.a4 White intends b5 32...Qe2 33.Ke2 g6 34.b5 (34.h3 f5+=) 34...ab5 35.ab5 Ke7 36.bc6 bc6 37.Ke3 Nf6 38.h3 h5 39.f5 g5 40.h4 gh4 41.gh4 Kd7? (better 41...Ng8=) 42.Kf4+– Ke7 43.Kg5 Ng4 44.Kh5 Nf2 45.Bb1 Kf6 46.Kh6 (46.Bc2 Nh3 47.Kg4 Ng1+–) 46...Ng4? (better 46...Ne4 47.Bd3 Nf2+–) 47.Kh5?? (better 47.Kh7+–) 47...Ne3 Attacking the isolated pawn on f5 48.Bd3 Ng2 (better 48...Nf5!? 49.Bf5 Kf5=) 49.Kg4 Ne3 50.Kf3 (50.Kf4 Ng2 51.Kg3+–) 50…Nf5=+ (50...Nf5 51.Bf5 Kf5–/+) 0–1. KLINGON09 (1800) – Pewa_Masterchess (1965), lichess.org, 2019.

4.f4 Nf6 5.Nf3 Bg4 6.Be2 Bf3 (6...e6 7.Bb2+=) 7.Bf3 e6 8.0-0 (8.d3 a5 9.ba5 Ra5=) 8...a5 9.Qa4 (9.ba5 Ra5 10.d4 c5+=) 9...Nbd7+= 10.d4 (10.Na3 Bd6+=) 10...Be7 (10...Bd6 11.Be2+=) 11.Nd2 0-0 12.ba5 Ra5 13.Qc2 Rfa8 14.Nb3 (14.e4 Qa7+=) 14...Ra4–/+ 15.Rf2 Qa7 Increases the pressure on a2 (15...c5 16.e4–/+) 16.h3 (16.e4 de4 17.Be4 Ne4 18.Qe4 Nc5 19.Nc5 Qc5+=) 16...c5–/+ Black fights for the Initiative 17.dc5 (17.e4 c4 18.Nd2 Ra2 19.Ra2 Qa2–/+) 17...Nc5 18.Nd4 (18.Nc5 Bc5 19.Qd2 Ne4 20.Be4 Re4–/+) 18...Nce4 (18...Nfe4 19.Rf1–+) 19.Be4 (19.Rf1 Ra2 20.Ra2 Qa2–+) 19...Ne4 (19...de4?! 20.Qb3–/+) 20.Re2 Bf6 (20...Qa5 21.Qb2 Qc3 22.Qc3 Nc3 23.Rb2–+) 21.Bb2 (21.Rb1 Qc5 22.Rb3 Rc8–+ (worse is 22...Bd4 23.cd4 Qa7 24.Qb1–/+; worse is 22...Ra2 23.Qa2 Ra2 24.Ra2–/+)) 21...Ra2 22.Rc1 (22.Ree1 Qb6–+) 22...Nd6 (22...Qa6 23.c4 Rc8 24.Qd3–+) 23.Qb3 (23.Qd3 Qa6 24.Qa6 ba6–+) 23...Qa6 24.Kf2 (24.Rcc2 Qd3 25.Kh2 R2a7–+) 24...Qd3 (24...h6 25.Rd1–+) 25.Rd1 Qc4 (25...Qg6 26.Kg1–+) 26.Qb4 (26.Qc4 Nc4 (worse is 26...dc4 27.Kf3–/+) 27.Bc1 Nd6–+) 26...Bd4 (26...Qa6 27.Kf3–+) 27.Rd4 Qa6 28.Kf3 h6 (28...b5 29.Kf2–+) 29.g4 (29.Qb3 Qc6–+) 29...Nc4 30.f5 (30.Kg3 b5–+) 30...Nb2 (30...Ne5!? 31.Kf2–+) 31.Rb2 Qf1 32.Kg3 Qe1 (32...ef5 33.Qb5 Qg1 34.Kf3 Rb2 35.Qb2–+) 33.Kf3 (33.Kg2 Ra1 34.Rdd2 ef5–+) 33...e5 (33...ef5!? 34.Qb5–+) 34.Rdd2 Rb2 (34...Qf1 35.Kg3 Qg1 36.Kf3–+) 35.Qb2 Qf1 (35...Qh1 36.Kg3–+) 36.Kg3 Qg1 37.Kf3 Ra1 Do you see the mate threat? 38.Rf2 Rb1 39.Qa2 Qd1 (39...Rc1 40.Qd2–+) 40.Kg2 (40.Kg3–+) 40...Qd3 (better is 40...b5!?–+) 41.Qc2–/+ Qb5 42.Re2 (42.f6 gf6 43.Qf5 Rb2 44.Qf6 Rf2 45.Kf2 Qb2 46.Kg3 Qc3 47.Qh6 Qc7–/+) 42...Rb3 (42...Qc4 43.f6 Rb3 44.fg7 Rc3 45.Qd2–+) 43.Kf2 (43.Rd2 Ra3–+) 43...Qc4 44.f6 (44.Qa2–+) 44...gf6 45.Qf5 (45.Rd2 Rc3 46.Qf5 Kg7–+) 45...Kg7 (45...Rc3?! 46.Qf6 Rc2 47.Rc2 Qc2 48.Kg3–/+; 45...Qc3?! 46.Qf6 Rb2 47.Qh6 Re2 48.Ke2 Qc2 49.Ke1–/+) 46.Qd7 (46.Kf3 Rc3 47.Rf2 Qc6–+) 46...Qc6 (better is 46...Rb1!? 47.g5 hg5 48.Qg4–+) 47.Qf5 (47.Qc6 bc6 48.c4 d4 49.ed4 ed4–+) 47...Rc3 48.h4 White plans g5 (48.Qf3 e4 49.Qf4 d4–+) 48...Qe6 (48...d4 49.ed4 Qh1 50.Qe4 Qh4 51.Kf1–+) 49.Qf3 (49.Rb2 Qf5 50.gf5 Rc4–+) 49...Rc4 (49...d4 50.Kg2–+) 50.g5 (50.Kg3–+) 50...fg5 (worse is 50...Rh4 51.gh6 Rh6 52.Ke1–+) 51.hg5 hg5 52.Qg2 (52.Rd2 d4 53.ed4 Rd4 54.Rd4 Qb6–+) 52...Qf5 (52...Qf5 53.Qf3 Qf3 54.Kf3 b5–+) 0–1. Sviridov,Valentin – Pacl,Vaclav, Hornicky Kahanec, 1980.

4.e4 =.

4.Nf3 e4 5.Nd4 d5 6.Nb3 (6.d3 Nf6=) 6...Nf6 7.Be2 (7.d3 Bd6+=) 7...Bd6 8.Na3 (8.0-0 0-0+=) 8...Nbd7 9.Nc2 Ne5 10.d4 (10.Ncd4 0-0–/+) 10...ed3 11.Bd3 Nd3 12.Qd3 Ng4 13.h3 (13.Ncd4 Ne5 14.Qe2 0-0–/+) 13...Ne5 14.Qe2 (14.Qd1 Qa6 15.Qd2 Bf5–+) 14...Bf5–+ 15.Ncd4 Bd3 (15...Bg6 16.Bb2–+) 16.Qd2 Bc4 (16...Be4 17.0-0–/+) 17.a4 (17.Na5 Nd3 18.Kf1 Ba6–/+) 17...Nd3 Black gets the initiative 18.Kd1 0-0 19.Na5 c5 20.Nc4 dc4 21.bc5 (21.a5 Qd8 22.bc5 Bc5–+) 21...Bc5 22.Ke2 (22.a5 Qf6 23.Rf1 Qg6–+) 22...Rfe8 23.Kf1 Rad8 (23...Qf6 24.Kg1–+) 24.Kg1 Rd6 (24...Qd6 25.a5–+) 25.Kh2 Rg6 (25...Bd4 26.cd4 Qc7 27.g3–+) 26.g3 (26.Rf1 Qd6 27.Kh1 Qd5–/+) 26...Ne5 (26...Qf6 27.Ra2–+) 27.Qe2 Qf6 28.Rd1 (28.Rf1 Nd3–/+) 28...Bd4–+ 29.cd4 Nf3 30.Kg2 (30.Kh1 Nd4! 31.Qf1 Qf3 32.Kh2 Nb3–+) 30...Nd4! 31.Rd4 (31.ed4 Exploits the pin 31...Re2) 31...Qd4!! 32.ed4 A pinning theme. Threatening mate... how? 32...Re2 33.Be3 Rb2 34.a5 (34.d5 Ra6–+) 34...Rb5 35.Kf3 f5 (35...Ra6 36.Rc1 Rc6 37.a6–+) 36.Bf4 (36.Ke2 Ra6 37.Rc1 Rc6–+) 36...c3 (36...Ra6 37.Rc1 Rc6 38.a6–+) 37.g4 (37.Ke3 Rc6–+) 37...fg4 (37...Rc6 38.gf5 c2 39.Rc1–+) 38.hg4 Ra6 (38...Rc6 39.a6–+) 39.Rc1 Rba5 (39...Rc6 40.a6–+) 40.Ke4 (40.Rc3 Ra3 41.Re3–+) 40...Rc6 41.Kd3 Kf7 (41...Ra3 42.Be3–+) 42.Rc2 (42.Rc3 Rc3 43.Kc3 Rd5–+) 42...Rc8 (42...Ra3 43.Bc1 Rb3 44.d5–+) 43.Be5 (43.Rc3 Rc3 44.Kc3 Rd5–+) 43...b5 (43...Ra3!? 44.Bd6 Rb3 45.Be5–+) 44.Bd6 (44.Rc3 Rc3 45.Kc3 Ra1–+) 44...Ra4 (better is 44...Ra1 45.Rc3 Rd1 46.Kc2 Rc3 47.Kc3 a5–+) 45.f4 (45.Rc3 Rc3 46.Kc3–+) 45...b4 46.Bc5 a5 47.Kc4 (47.Rh2 h6–+) 47...Ra1 48.Kb5 (48.Rh2–+) 48...b3 (48...b3 49.Rc3 b2–+) 0–1. Sviridov,Valentin – Mesiarik,Rudolf, Hornicky Kahanec, 1980.

3.a3 a5 4.Bb2 ab4 5.ab4 Ra1 6.Ba1 Nd7 7.c4 Ngf6 8.cd5 Nd5 9.b5 f6 (9...e5 10.bc6 bc6 11.Nc3+=) 10.Nf3 e5 11.Be2 Qa5 12.Nc3 Bb4 13.0-0 0-0 14.Ne4 (14.Qc2 N7b6=) 14...Re8 15.Qb3 N7b6 16.bc6 bc6 17.Qc2 Qa4 18.Qb1 Ba6 19.Ba6 Qa6 20.Rc1 Nd7 21.d4 f5 22.Nc5 Nc5 23.dc5 e4 24.Qb2 Do you see the mate threat? 24...Re7 25.Ne5 Ra7 26.h3 (26.Nc4 Bc5 27.Qe5 Rf7=) 26...h6 (26...Qb5 27.Qb3+=) 27.Qc2= Ba5 28.Bd4 Bc7 29.Nc4 Qc8 30.Qb2 Qb8 31.Nb6 Kh7 32.Nd5 Qb2 33.Bb2 cd5 34.Rd1 Ra2 35.Bd4 Kg8 36.Rb1 Ra7 37.g4 f4 38.h4 g5 39.h5 (39.hg5 hg5 40.Bf6 Ra5+/–) 39...Ra6 40.Rb7 Rc6 41.ef4 gf4 (worse is 41...Bf4 42.Rd7+/–) 42.Kg2 Kf8 43.Ra7 f3 44.Kh3 Ke8 45.g5 hg5 The passed pawn on h5 will quickly become a dangerous weapon 46.Kg4 Bf4 47.Rb7 (47.Rb7 Rh6 48.Bg7+=; 47.Bg7 Rc7 48.Rc7 Bc7+–) 1–0. Woelfelschneider,Peter – Siger,Csaba, 2009.

3.a3 Nf6 4.Bb2 Bf5 5.Nf3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

3.a4 e6 4.Bb2 Nf6 5.b5 Be7 6.Nf3 0-0 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4).

3.a4 Nf6 4.b5 Bf5 (4...e5 5.d4=+) 5.Nf3 h6 (5...e6 6.Be2=+) 6.c4 (6.Be2 e6=) 6...e6=+ 7.Nc3 Bb4 8.Be2 (8.Ba3 Ba3 9.Ra3 a6=) 8...Bc3 (8...dc4 9.Bc4 Bc3 10.dc3 Qd1 11.Kd1=) 9.dc3= 0-0 10.0-0 (10.Ba3 Re8=) 10...b6 (10...Qc7 11.Qd4=) 11.cd5+= cd5 12.Nd4 (12.Ba3 Re8+=) 12...Bg6 (12...Be4 13.Bb2=) 13.c4 dc4 14.Bc4 (14.Ba3 Re8 15.Bc4 e5+=) 14...Nd5 (14...e5!? 15.Nf3 Qc7+=) 15.Qb3 Qd6? (better 15...Qd7+–) 16.Ba3+– Qe5 17.Bf8 Kf8 18.Rfd1 Nd7 (18...Nc7 19.Bd3 Bh5 20.Qb4 Ke8 21.Rdc1+–) 19.Nc6 Qg5 (19...Qf6 20.Qa3 Ke8 21.Bd5 ed5 22.Nb4+–) 20.Bd5 Nc5 21.Qc4 ed5 22.Rd5 (worse 22.Qd5 Qd5 23.Rd5 Be4+–) 22...Qf6 23.Rad1 Kg8 24.Rd6 Ne6 25.Qd5 Qh4 (25...Kh7+–) 26.Ne7! Kh7 (26...Qe7 27.Qa8 Discovered attack) 27.Ng6 Kg6 28.Qa8 1–0. KLINGON09 (1925) – somoni (1950), lichess.org, 2019.

3.b5 a6 4.c4 dc4 5.Bc4 (5.bc6!? Nc6 6.Bc4+=) 5...ab5–/+ 6.Bd3?? (better is 6.Be2–/+) 6...Qd3–+ 7.Bb2 (7.Nf3 Nf6 8.Bb2 Nbd7–+) 7...Nf6 (better is 7...Na6 8.a3–+) 8.Qe2 (8.Nf3 Nbd7–+) 8...Bf5 (8...Qg6!? 9.Bf6 gf6 10.d4 Qg2 11.Qf3–+) 9.Nf3 (9.Nc3 Nbd7 10.Nf3 e5–+) 9...Nbd7 10.Nc3 e5 11.h3 (11.a3 Bd6–+) 11...Ba3 (11...b4 12.Qd3 Bd3 13.Ne2–+) 12.Nd1 (12.Ba3 Ra3 13.g4 Be4 14.Ne4 Qe4–+) 12...0-0 (12...Bd6 13.Nh4–+) 13.Be5 (13.Qd3 Bd3 14.Ne5 Bb2 15.Nb2 Ne5–+) 13...Ne5 14.Ne5 Qd5 (14...Qd6!? 15.d4 Rfe8 16.0-0 Re5 17.de5 Qe5 18.e4–+) 15.d4 (15.f4 Rfd8 16.Nc3 Qc5–+) 15...Qg2 (15...Qg2 16.Qf3 Bb4 17.Ke2 Qf3 18.Nf3 Ra3–+) 0–1. Rush,Bradley – Willmann,Bernd (1620), OP–2012–0-02206, 2012.

3.b5 cb5 4.Bb5= Bd7 5.a4 e5 6.Bb2 Bb5 (6...Qc7 7.Ne2=) 7.ab5 Nd7 8.Nf3 Bd6 9.d4 (9.0-0 Ngf6=) 9...e4 10.Ne5 (10.Nfd2 Ngf6=) 10...Qg5+= 11.Qg4 Do you see the mate threat? 11...Qg4 12.Ng4 Ne7 (12...a5 13.Ba3 Ba3 14.Na3+=) 13.Nd2 (13.Ba3 Ba3 14.Na3 h5–/+) 13...Nb6 (better is 13...h5 14.Ne5 Nb6+=) 14.Ba3? (better is 14.f3 f5 15.Nf2+=) 14...Ba3–+ 15.Ra3 h5 16.0-0 (16.Ne5 f6 17.f3–+) 16...hg4 17.g3 (17.Rfa1 Nec8–+) 17...f5 18.c3 Kf7 19.Nb3 (19.Rfa1 Nec8–+) 19...Nc4 20.Ra2 (20.Ra4 a5–+) 20...Nd6 21.Nc5 (21.b6 ab6 22.Rc2 Rh3–+) 21...b6 22.Nd7 Ke6 23.Ne5 Nb5 24.Rc1 g5 25.c4 (25.Ra4 Rhc8 26.c4 dc4 27.Rcc4 a5–+) 25...dc4 26.Rc4 Nd6 27.Rc1 (27.Rc7 a5–+) 27...a5 28.Nc6 (28.Rca1 Nd5–+) 28...Rhc8 29.Rac2 Nc6 30.Rc6 Rc6 31.Rc6 b5 32.Rc5 a4 (32...a4 33.Re5 Kd7–+) 0–1. Moderlak – Rosner,Dirk, email SOK–E008A, 1999.

3.b5 e5 (--> 1.b4 e5 2.b5 d5 3.e3 c6).

3.Nc3 e5 4.a3 Nf6 5.Qe2 Be7 6.Kd1 0-0 7.f3 a5 8.ba5 Ra5 9.Ra2 Be6 10.d4 Nbd7 11.Nb1 ed4 12.ed4 Qb6 13.Nd2 Qd4 14.Bb2 Qb6 15.Bf6 Nf6 16.Nb3 Ra3 17.Ra3 Ba3 18.Qe5 Re8 19.h3 Ne4 20.fe4 Bg4 21.hg4 Re5 22.Nf3 Re4 23.g5 Re3 24.Ne1 Qd8 25.Nf3 Be7 26.Na1 Ra3 27.Nb3 Bg5 28.Rh3 Ra2 29.Ne1 c5 30.c3 c4 31.g3 Qb6 32.Bc4 dc4 33.Nc2 Qb3 34.Rh2 Qb1 35.Ke2 Qc2 36.Kf3 Qf5# 0–1. Chad's Chess V015 – Pepito v1.30, 2001.

3.Nc3 e6 4.a3= a6 (4...Nf6 5.Nf3=) 5.Nf3 (5.d4 a5 6.b5 Nf6=) 5...b5 (5...Nf6 6.Be2=) 6.Bb2 Nf6 7.Bd3 (7.Be2 Bd6=) 7...Ng4 (7...Bd6 8.0-0=) 8.h3 (8.Ne2 Nd7+=) 8...Nh6 (8...Nf6 9.0-0+=) 9.0-0 f5 (9...a5 10.ba5 Ra5 11.e4+=) 10.Ne2 Qc7 11.a4 ba4 (11...Bb4 12.ab5 Bd6 13.b6+=) 12.Ra4 Qd6 (12...c5!? 13.Be5 Bd6 14.Bd6 Qd6 15.bc5 Qc5+=) 13.Be5+/– Qe7 (13...Qd7 14.Qa1+/–) 14.Ned4 c5 (14...Bd7!?+/–) 15.bc5 (15.Nb5 Kd7 16.Nc7 Ra7 17.Nd5 ed5 18.Bb8 Ra8+–) 15...Qc5 (15...Nd7 16.Bb5 Kf7 17.Bd6+–) 16.Bb5 (better is 16.Nb5 Kd8 17.Nc7+–) 16...Kd8? (better is 16...Ke7+–) 17.Ng5 Bd7 (17...Ke7 18.Qh5 ab5 19.Ra8 Nd7 20.Nge6 Qc4+–) 18.Nge6 Be6 19.Ne6 Kc8 20.Nc5 Bc5 21.Bg7 Rg8 22.Bh6 Rg6 23.Bf4 Nd7 24.Qa1 Rb8 25.Qh8 Nf8 26.Qe5 Rb5 27.Qc7# 1–0. pierre – opponent, internet, 2008.

3.Bd3 e5 4.b5 e4 5.Be2 f5 (5...Nd7 6.Bb2=+) 6.bc6 Nc6 7.d3 (7...Nf6 8.Bb2–/+) –/+. Stiller – reza9739, ChessWorld.net, 2002.

3.d4 b5 4.a4= e6 5.c3 Nf6 (5...ba4!? 6.Nf3 Bd6+=) 6.ab5+/– Bd7 7.bc6 Bc6 8.Bd3 Bd6 9.Nf3 0-0 10.Ba3 a5 (10...a6!?+/–) 11.b5 Bb7 12.Bd6 (12.0-0 Qb6+/–) 12...Qd6+/– 13.Qb3 g6 (13...Nbd7 14.0-0+/–) 14.c4 (better is 14.Qa3 Qb6 15.Qc5+/–) 14...Ne4? (better is 14...dc4 15.Bc4 Bf3 16.gf3 Nbd7+=) 15.Be4 (15.c5!? Qc7+–) 15...de4 16.c5 Qe7 17.Nfd2 Bd5 18.Qc2 Qb7 19.Nc3 f5 20.Qb2 (20.0-0 e5+–) 20...Rd8 21.0-0 h5 (21...Nc6 22.Ra4+–) 22.Nd5 ed5 23.Ra4 Rc8 (23...Nc6 24.Rfa1+–) 24.Rfa1 Kh8 25.Ra5 Ra5 26.Ra5 Nc6 27.Ra2 Nb8 28.c6 Qb6 29.f3 Kh7 30.fe4 de4 (30...fe4 31.Qb3 Qd8+–) 31.Nc4 Qd8 (31...Qc7 32.d5 Rg8 33.Qe5+–) 32.Ra8 (better is 32.Ra7 Rc7 33.b6 Ra7 34.ba7 Na6 35.Qb7 Nc7+–) 32...Nc6 33.Rc8 (33.bc6?! Ra8 34.Qb7 Kh6=) 33...Qc8 34.bc6 Qc6 35.Ne5 Qa4 (35...Qc7 36.h4+–) 36.h3 (better is 36.Qb7 Kh6 37.Nf7 Kg7 38.Ng5 Kf6 39.h4+–) 36...Qd1 (36...Qa6+–) 37.Kh2 Kh6 (37...Qd2 38.Qb7 Kh6 39.Qc6 Qg2 40.Kg2 Kg5 41.Qg6 Kh4 42.Qf6) 38.Qb6 Kg5 (38...Qg1 39.Kg1 Kg5 40.g3 f4 41.Qg6) 39.Qg6 Kh4 40.g3# 1–0. Feiertag,Manfred (1770) – Korn,Lothar (1700), remoteschach.de, 2008.

3.d4 Nf6 4.a3 Bg4 5.f3 Bh5 6.Nh3 e6 7.Nf4 Be7 (7...Bd6 8.Bd3=) 8.h4+= Bd6 (better is 8...h6!? 9.Bd3 Bd6+=) 9.g4+– Bf4 (9...Bg4 10.fg4 e5 11.de5 Be5 12.Ra2+/–) 10.ef4 0-0 11.Nc3 a5 12.b5 (worse is 12.gh5 ab4 13.Ne2 Nh5+/–) 12...Qc7 13.Rh2 c5 14.gh5 Nh5 15.Qd2 cd4 16.Qd4 b6 (16...Nd7 17.Bd3+–) 17.Rg2 Nf6 (17...Nd7+–) 18.Qf6 g6 19.Nd5! (19.Nd5 ed5 20.Bb2+–) 1–0. Schulz,Hans_Juergen (2305) – Neffgen,Dieter (1840), RS6D – A00 – Sokolsky Alt–1, 2004.

3.Be2 Qd6 +=.

3.Nf3 Qd6 4.a3 e5 5.Bb2 e4 6.Nd4 (---> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 e4 5.Nd4 c6 6.e3).

3.f4 e6 4.a3 Nf6 5.Nf3 b5 6.a4 Bb4 7.ab5 0-0 8.Be2 Re8 (8...cb5 9.Bb5 Qb6 10.Be2+=) 9.Ba3= Bd6 10.0-0 Bb7 11.d4 Ba3 12.Na3 Ne4 13.Bd3 cb5 14.Nb5 a6 15.Na3 a5 16.Be4 de4 17.Nd2 Nd7 18.c4 Nf6 19.c5 Bc6 20.Nac4 Nd5 21.Ra3 (21.Ne4?! Ne3 22.Ne3 Be4=) 21...f5 22.Nd6 Rf8 23.N2c4 Qc7 24.Ne5 Rfb8 25.Qc2 a4 26.g4 Nb4 27.Qg2 Bd7 28.Kh1 Nd5 (28...Bc8!?+/–) 29.Rg1+– (29.Rg1 Bb5 30.gf5 ef5 31.Qa2+–) 1–0. Taulien,Hans_Juergen (2350) – Neffgen,Dieter (1840), RS6D – A00 – Sokolsky Alt–1, 2004.

3.h3 e5+= (3...Nd7 A) 4.Nf3 e5 5.Bb2 Bd6 6.c4 dc4 7.Bc4 Ngf6 8.Qc2; B) 4.a3 e5 (4...Ngf6 5.d4 e5 6.de5 Ne5 7.Bb2 Bd6 8.Nf3) 5.d4 Bd6 6.de5 Ne5 7.Bb2 f6 8.Nf3; C) 4.Bb2 e5 5.Nf3 Bd6 6.c4 dc4 7.Bc4 Ngf6 8.Qc2) 4.Bb2 Nd7 (4...e4 5.a3 Nf6 6.d3 Nbd7 7.Nd2 a5 8.b5) 5.a3 (5.Nf3 Bd6+= 6.Be2 Ngf6 7.a3 0-0 8.Nc3) 5...Ngf6 (5...Bd6 6.Nf3 Ngf6 7.Be2 0-0 8.0-0) 6.d3 (6.Nf3 Bd6+= 7.Be2 0-0 8.0-0) 6...Be7 (6...a5 7.b5–/+ cb5 8.d4) 7.Nd2 (7.Nf3 Qc7 8.c4) 7...0-0 (7...a5 8.Bc3+=) 8.Ngf3 Bd6 9.e4 (9.c4 Re8+=) 9...de4 (9...a5 10.c4–/+) 10.de4 Qc7 (10...Qe7 11.Bd3=) 11.Bc4 (11.Nc4 Ne4 12.Qd3= (worse is 12.Nd6 Nd6 13.Qd2 Re8–/+)) 11...a6 (11...a5 12.b5+=) 12.0-0. novice1234 – nickbarletta, ChessWorld.net, 2009.

4.Bb2 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 c6).

4.Bb2 Bd6 5.Nf3 Qe7 6.c4 Nf6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6 6.Nf3 Qe7).

4.Bb2 Nd7 5.c4 Ngf6 6.Nc3 Bd6 7.cd5 cd5 8.d4 e4 9.Rc1 a6 10.Nge2 Nb6 11.Ng3 h5 12.Be2 (12.Nge2 h4=+) 12...h4 13.Nf1 Bd7 (13...Rh6 14.Nd2=+) 14.Nd2= h3 15.g3 0-0 16.0-0 Re8 17.f3 (17.Qb3 Bg4=) 17...ef3 18.Rf3 Qe7 19.Nf1 (19.Qc2 Rac8 20.Qb1 Bg4 21.Rf6 Qe3 22.Rf2 Be2–/+) 19...Bg4–/+ 20.Rf2 Be2 21.Re2 Qe6 (21...a5 22.ba5 Ra5 23.Qb3–/+) 22.Qd3 (22.Nd2 Qg4=+) 22...Qg4 (22...a5 23.b5–/+) 23.Rce1 (23.Nd2 Rac8=+) 23...Nh5 (23...Ne4 24.Ne4 de4 25.Qb3=+) 24.Nd1 Qg5 25.Kh1 (25.Nf2 Bg3 26.Nh3 Qg4 27.hg3 Qh3=) 25...Nf6=+ 26.Nf2 Qh5 (better is 26...Ne4!?=+) 27.e4+= de4 28.Ne4 Qd5 29.Qf3 (29.Kg1 Re4 30.Re4 Nc4–/+) 29...Ne4=+ 30.Re4 Re4 31.Re4 Rc8 32.Ne3 Qb3 33.Qe2 Bf8 0–1. Kilpatrick,Robert – Ganesan,Arasu, corr 3GMM½–04, 1998.

4.d4 Bd6 5.c4 ed4 6.Bb2 (6.Qd4 Nf6=) 6...Nf6 (6...de3!? 7.Bg7 Qh4=+) 7.Bd4= (< 7.ed4 0-0 8.Nf3 Re8 9.Ne5 Nbd7–/+) 7...0-0 8.cd5 Nd5 9.Nc3 Nc3 10.Bc3 Qe7 11.Bd3 a5 (11...Be6 12.Qh5 g6 13.Qh6=) 12.ba5 Re8 13.Qc2 h6 14.Nf3 Bg4 15.Nd2 Nd7 16.h3 Be6 17.0-0 Be5 (17...Nc5 18.Bh7 Kh8 19.Rad1=) 18.Rfb1 Bc3 19.Qc3 (19.Rb7?? Ba1 20.Qc6 Ra5–+) 19...Qc5 Exerts pressure on the isolated pawn 20.Nc4 Bc4 21.Bc4 Qa7 22.Ra2 Re7 (22...Nc5 23.Rd2+=) 23.Qb4 (23.Rc2 Qa5 24.Rb7 Qa3 25.Qa3 Ra3+–) 23...Nc5+= 24.Rc1 White gets the initiative 24...Kf8 25.Be2 Ne6 26.a6 c5 27.ab7 Rb7 (27...cb4 28.Rc8 Re8 29.ba8Q Qa8 30.Ra8 Ra8 31.a4+=) 28.Qc3 Rab8 29.Bc4 Rb1 30.Ra1 Rc1 31.Rc1 Ng5 32.Bd5 Rc8 33.Rb1 Qa4 34.Bb7 Rc7 35.Qe5 Qd7 36.Bd5 Rc8 37.Rb7 Qe8 (37...Qd8 38.h4 f6 39.Qf5+–) 38.Qf5 (better is 38.Qe8 Ke8 39.f4+–) 38...c4? (better is 38...Rd8+–) 39.h4 Ne6 (39...Rb8 40.Rb8 Qb8 41.hg5 Qc7+–) 40.Be6 Qe6 41.Qh7 (41...Rc7 42.Rc7 Qd7 43.Rd7 Ke8 44.Rb7 c3 45.Qg8#) 1–0. Spiegel,U – Bendig,Frank, corr KGP–Z–05, 1990.

4.Bb2 Bb4 5.Be5 Nf6 6.c4 (6.Nf3 0-0=+) 6...0-0 7.Nf3 Re8 8.Bb2 (8.Nc3 dc4 9.Bc4 Be6=) 8...Bg4–/+ 9.cd5 (9.Nc3 d4 10.Ne2 de3 11.fe3 Re3–+) 9...Nd5 10.Bc4 Re4 (10...Nb6 11.Be2–/+) 11.Bb3 (11.Qc2 Bf3 12.gf3 Re6=+) 11...Nd7 12.0-0 N7f6 13.h3 Bh5 14.d3 Re8 15.e4 Nf4 16.Bc4 Qe7 17.Bc1 (17.a5 b5 18.ab6 ab6 19.Ra8 Ra8–/+) 17...Bd6 18.Nbd2 (18.Be3 c5=+) 18...Rad8 19.Kh1 (19.Qc2 Ne2 20.Kh1 Nc1 21.Rfc1 Ba3=+) 19...Be5 20.Ra3 c5 21.Qb3 Bb8 22.Bb5 Rf8 23.Re1 a6 24.Bc4 Rfe8 25.Nf1? Nh3!–+ 26.Be3 Bf3 27.gf3 Nf4 28.Ng3 Qd7 29.Nf5–/+ Rc8 30.Rg1 Ng6–/+ 31.Kg2 Ne5 32.f4 Nc4 33.Qc4 g6 34.Kf1 Kh8 35.Ng3 Qh3 36.Ke1 Qe6 37.Qc2 c4–/+ 38.e5 Nd5 39.d4 Ne3 40.fe3–/+ b6 41.Rc3 Qd5 42.Ne4 Re7 Black gets strong initiative 43.Nf6 Qf3 44.Qd2 Qc6 45.Rg2?? Qa4= 46.Rh2 h5 47.d5 b5 48.Kf2 b4–+ 49.Rc1 c3 50.Qd4 Ba7 51.Qe4 Kg7 52.Kf3 Qa3 53.Rhh1 Qa5 54.Ra1 Qb5 55.d6 Re6 56.Nd5 Rc4 57.Nc7 Re4 58.Nb5 Re3 59.Kf2 Bc5 60.Ra6 R3e5 61.Kg3 Rd5 62.Nc7 Rd3 63.Kh4 Bf2 64.Kg5 f6# 0–1. NN – REXChess, 1994.

4.Bb2 Nd7 5.Nf3 Bd6 +=.

4.Be2 Qg5 5.g3 Bb4 6.Nf3 Qe7 7.0-0 Nf6 8.Bb2 e4 9.Nh4 0-0 10.c3 Bd6 11.f4 ef3! 12.Bf3 (12.Bf3 Bh3 Combination; 12.Rf3 Bg4 Decoy; 12.Nf3 Na6 Combination) 12...Na6 13.Na3 Ne4 14.Ng2 Bh3 15.Bg4? (better is 15.c4–+) 15...Bg4 16.Qg4 Nd2 17.c4 (17.Rf2 Nb3 18.Ra2 Qe6–+) 17...f6 18.Rfd1 Nb3 19.Ra2 (19.cd5 Na1 20.dc6 bc6–+ (20...Ba3?! 21.Rd7 Qd7 22.Qd7 Bb2 23.Qb7–+)) 19...Nb4 20.Bf6 (20.cd5 Na2 21.dc6–+) 20...Qf6 (20...Na2 21.Be7 Be7 22.Qe6 Rf7 23.Rf1+=; worse is 20...Rf6 21.Rb2 Nc1 22.cd5–+) 21.Nf4 (21.Re2 Nd3 22.Nf4 Nf4 23.ef4 Ba3 24.cd5 Bc5 25.Kg2–+) 21...Na2 22.Rb1 (22.Nb1 Bc5 23.cd5 Be3 24.Kh1 Nd4–+) 22...Nac1 23.Nc2 Bf4 24.ef4 dc4 25.Ne3 Rae8 26.Nc4 Qd4 27.Kg2 Qc4 28.Kh3 Rf6 29.Qd7 Rh6 30.Kg4 (30.Kg2 Qe4 31.Kg1 Ne2 32.Kf2 Rh2 33.Ke1 Qh1) 30...Qe2 31.Kg5 Rh5# (31...Qh5#) 0–1. mikebaldini (1670) – chabotte (1625), gameknot.com, 2015.

4.d4 e6 5.Bd2 Bd6 6.c4 Nf6 7.c5 Bc7 8.Nc3 e5 9.de5 Be5 10.Nf3 Nbd7 11.Nd4 (11.Be2 a5=) 11...Bg6 12.a5 a6 (12...0-0 13.a6 Qc7 14.ab7 Qb7 15.b5 Nc5 16.Nc6=) 13.Be2= Qc7 14.h4 (14.f4 Bd4 15.ed4 Bf5=) 14...Ne4 (14...0-0-0 15.0-0=+) 15.h5= Bd4 16.ed4 Nc3 (< 16...Nd2 17.hg6 (17.Kd2?! Be4=) 17...Ne4 18.Ne4 de4 19.gf7 Kf7 20.d5+/–) 17.Bc3 Be4 18.f3 Qg3 (18...Bf5 19.g4 Be6 20.h6=) 19.Kf1+= Bf5 (19...0-0 20.fe4 f5 21.ed5 cd5 22.h6+–) 20.Be1 (20.Qe1 Qc7 21.Ba6 Kd8 22.Qh4 f6+/–) 20...Qf4 (20...Qc7 21.Qd2 f6 22.g4+=) 21.g3 (better is 21.Qd2!? Qd2 22.Bd2+/–) 21...Qh6 22.g4 Be6 23.Qd2 g5 24.Bd3 (24.Bg3 0-0-0=) 24...Qf6 25.Qe3 (25.Qf2 0-0-0=) 25...0-0-0 26.Kg2 Rhe8 27.Qf2 h6 28.Qb2 Qg7 29.Bg3 Nf8 (29...f5 30.gf5 Bf7 31.Qf2=) 30.b5 cb5 31.Bb5! ab5 32.Qb5 (32.a6 f6 33.Qb5+–) 32...f5?? (32...Bd7 33.Qb6 Ne6+–) 33.a6+– (33...f4 34.a7+–) 1–0. Andersson,Lars H – Modig,Benny, corr SSKK 1–448, 1992.

4.Nf3 e6 5.Bb2 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.b5 Bd6 7.Be2 0-0 8.Nh4 Be4 9.d3 Nfd7 10.bc6 bc6 (10...Qh4?? 11.cb7 (11.de4?! bc6 12.ed5 cd5=; 11.cd7? Bg2 12.Rg1 Qh2–+) 11...Bb4 12.c3+–) 11.de4 Qh4 12.ed5 cd5 13.c4 Nb6 14.Nd2 Bb4 15.0-0 Bd2 (worse is 15...Nc4 16.Nc4 dc4 17.Bf3+=) 16.Qd2 Nc4 (worse is 16...dc4 17.a5 Nd5 18.Rfc1+=) 17.Bc4 Qc4 18.Rfc1 Qg4 19.a5 a6 20.h3 Qg6 21.e4 (21.Rc7!? Rd8 22.Ra4=) 21...Qe4–/+ 22.Rc7 Qh4 23.Ra3 d4 (23...Qd8!? 24.Bg7 Qc7+= (24...Kg7?? 25.Rg3 Kh8 26.Qh6 Rg8 27.Rf7 Rg3 28.Qh7)) 24.Bd4+= Qd8 25.Qc3 (25.Qc3 Qg5 26.Qf3+=) 1–0. Beaumont,David (2535) – Dias,Sergio Moreira Ferr (2460), ICCF CADAP Championship, 2002.

(--> 1.b4 c6 2.Bb2 d5 3.e3).

3.Bb2 a5 4.b5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2).

3.Bb2 Qb6 4.a3 a5 5.b5 Nf6 6.c4 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 Qb6).

3.Bb2 Qb6 4.a3 a5 5.c3 Nf6 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3 Nf6 5.e3 d5).

3.Bb2 Qb6 4.c3 a5 5.a3 Nf6 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3 Nf6 5.e3 d5).

3.Bb2 Qd6 4.a3 e5 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.e3 c6).

3.Bb2 Qd6 4.a3 e5 5.Nf3 Nd7 6.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6).

3.Bb2 Qd6 4.a3 e5 5.Nf3 e4 6.Nd4 (---> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 e4 5.Nd4 c6 6.e3).

3.Bb2 Nd7 4.c4 Ngf6 5.Nf3 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

3.Bb2 Nd7 4.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nd7 4.e3).

3.Bb2 Nd7 4.Nf3 e6 5.c4 Ngf6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

3.Bb2 Nd7 4.Nf3 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

3.Bb2 Nd7 4.Nf3 Ngf6 5.a3 e6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

3.Bb2 e5 4.b5 f6 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3

3.Bb2 e6 4.a3 Nf6 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 e6 5.a3).

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

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

3.Bb2 Bf5 4.Nf3 Nd7 5.c4 (---> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3 Nd7 5.c4).

3.Bb2 Bf5 4.Nf3 Nd7 5.c4 e6 6.a3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

3.Bb2 Bf5 4.Nf3 e6 5.a3 Nf6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

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

3.Bb2 Bf5 4.Nf3 e6 5.c4 dc4 6.Bc4 Nf6 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

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

3.Bb2 Bf5 4.Nf3 e6 5.Be2 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6).

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

3.Bb2 Bf5 4.Nf3 Nf6 5.c4 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6).

4.a4 Nbd7 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.a4).

4.a3 Nbd7 5.Nf3 e6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.a3 Nbd7 5.Nf3 e6 6.c4 Bd6 7.c5 (---> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6 7.c5).

4.a3 e6 5.Nf3 Nbd7 6.d4 Bd6 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6 7.d4).

4.a3 Bf5 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.a3).

4.a3 Bf5 5.Nf3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

4.c4 dc4 5.Bc4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 dc4 6.Bc4).

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

4.c4 Nbd7 5.Nf3 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.c4 e5 5.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6).

4.c4 e6 5.a3 Be7 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 Be7 6.c4).

4.c4 e6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4).

4.c4 e6 5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4)

4.c4 e6 5.b5 Be7 6.a4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4).

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

4.c4 Bf5 5.Qb3 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.Qb3).

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

4.c4 Bf5 5.Nf3 Nbd7 6.Be2 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6 6.c4).

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

4.c4 g6 5.Nf3 Bg7 6.d4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

4.c4 g6 5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

4.Nf3 a5 5.b5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6 5.Nf3).

4.Nf3 Nbd7 5.a3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

4.Nf3 Nbd7 5.a3 e6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.Nf3 Nbd7 5.c4 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.Nf3 e6 5.a3 Bd6 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

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

4.Nf3 Bf5 5.a3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

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

4.Nf3 Bg4 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.Nf3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.Nf3 Bg4 5.Be2 Nbd7 6.0-0 e6 7.a3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3 Nbd7 7.0-0).

4.Nf3 g6 5.c4 Bg7 6.d4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5).

4.Nf3 g6 5.Be2 Bg7 6.0-0 0-0 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5 7.0-0).

3.c4 (--> 1.b4 c6 2.c4 d5 3.e3).

3.c4 e5 4.Bb2 (---> 1.b4 c6 2.c4 d5 TESTB800 3.e3 e5 4.Bb2).

3.c4 e5 4.Bb2 Bd6 5.a3 Nf6 6.Nf3 Nbd7 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6).

3.c4 e5 4.Bb2 f6 5.a3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6 5.c4).

3.c4 e5 4.Bb2 Nf6 5.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6).

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

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

3.c4 Bf5 4.Nf3 e6 5.b5 Nf6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

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

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

3.c4 Nf6 4.Bb2 Nbd7 5.Nf3 g6 6.d4 Bg7 7.Nbd2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nbd2 Nbd7).

3.c4 Nf6 4.Bb2 e6 5.a3 Be7 6.Qc2 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.Qc2).

3.c4 Nf6 4.Bb2 e6 5.a3 Be7 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 Be7 6.c4).

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

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

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

4.Bb2 Nf6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4).

4.Bb2 Nf6 5.b5 Bd6 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c6).

4.Bb2 Nf6 5.b5 Bd7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.c4 c6).

4.Bb2 Nf6 5.b5 Be7 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.c4 c6).

4.Bb2 Nf6 5.b5 Be7 6.Nf3 0-0 7.a4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4).

4.Bb2 Nf6 5.b5 Be7 6.Nf3 0-0 7.a4 Nbd7 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 Nbd7 8.Be2).

4.Bb2 Nf6 5.b5 Be7 6.Nf3 0-0 7.Nc3 a6 8.a4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 a6 8.Nc3).

4.a3 Bd6 5.c4 e4 6.Nc3 Nf6 7.Qb3 0-0 8.g3 (8.c5 Bc7+=) 8...dc4–/+ 9.Bc4 Nbd7 10.Qc2 Nb6 11.Bb3 Qe7 12.h3 a5 13.b5 cb5 14.Nb5 a4 15.Ba2 Be6 16.Be6 Qe6 (worse is 16...fe6 17.g4+=) 17.Nd6 Qd6 18.Ne2 Rfc8 19.Qb1 Nbd5 20.0-0 Qa6 21.Re1 Rab8 22.Bd2 Qd3 23.Ra2 Qc4 24.Rb2 b5 25.Bb4 g5 (better is 25...Nb4 26.Rb4 Qd3+=) 26.Bd6+= Rb6 27.Rc1 Rd6 28.Rc4 bc4 29.Rb8 Rdd8 30.Rc8 Rc8 31.Qb7 Rc7 (31...Rf8+–) 32.Qa8 (better is 32.Qb8 Kg7 33.Nc3+–) 32...Kg7+/– 33.Qa4 c3 34.Qc2 Ra7 35.Qb3 (35.Nc3?! Rc7=) 35...Rc7 36.Kf1 Kf8 37.Ke1 Ke7 38.Kd1 Kd6 39.Qb8 Nd7 (better is 39...c2 40.Kc1 Ke7+–) 40.Qh8 Ra7 41.Qh7 N7f6 (41...Ra3 42.Qf7 Ra1 43.Nc1+–) 42.Qh8 Ra3 (42...Ke7+–) 43.Qf8 Ne7 44.h4 (better is 44.Qf7!? Nfd5 45.Qg7 Ra1 46.Nc1 Nb4 47.Qe5 Kd7 48.Qb5 Nec6+–) 44...gh4 45.gh4 (45.Qf7 Nfd5 46.gh4 Ra1 47.Nc1 Nb4 48.Qf4 Kd7 49.Qe4 Na2 50.Qb7 Ke8 51.Qa8 Kf7 52.Qa2 Ra2 53.Na2 Nf5+–) 45...Nfd5 (45...Ra1 46.Nc1 Ke6 47.Kc2+–) 46.h5 (46.Ng3 Ra1 47.Kc2 Ra2 48.Kb1 Rb2 49.Kc1 f5 50.Nf5 Kd7 51.Ne7 Ne7+–) 46...Ra2? (46...Ke6 47.Qg7 f6+–) 47.h6 c2 48.Kc1 1–0. Oxuzian,Samvel (2010) – Adamson,Garry (2115), Omsk–ch op, 2009.

4.a3 Bd6 5.de5 Be5 6.c3 Bf5 7.Nf3 Bc7 8.Nd4 Bg6 9.h4 h6 10.h5 Bh7 11.Qg4 Kf8 (11...Be5 12.c4=) 12.Be2 Nd7 13.0-0 Ndf6 14.Qh4 Ne4 15.Qd8 Rd8 16.a4 Ne7 17.a5 a6 18.Bb2 Nf5 19.Nf3 Nf6 20.Nbd2 Nd6 21.Nd4 (21.c4 Nde4 22.Ne4 Be4 23.Bf6 gf6+=) 21...Ke7 22.Rfd1 Rhe8 23.Rac1 Kf8 24.N4b3 Bf5 (24...Nfe4 25.Ne4 Ne4 26.c4 dc4 27.Rc4 Rd1 28.Bd1=) 25.c4+= dc4 26.Bf6 (26.Nc4?! Nc4 27.Bc4 Nh5=) 26...gf6 27.Nc5 (27.Bc4?! Bg4 28.f3 Bh5=) 27...Re7 28.Nc4 Bc8 29.Nb6 Bb6 30.ab6 Ke8 31.Rd4 Nf5 (31...Re5 32.Rcd1 Ke7 33.g3+/–) 32.Rf4 Kf8 33.Ne4 (33.Bd3 Nd6+/–) 33...Ng7+= 34.Nf6 Ne6 35.Rh4 (35.Rfc4 Kg7 36.Ne4 Nd4 37.Rd4 Rd4 38.ed4 Re4 39.Ba6 Rd4+/–) 35...Kg7 (35...Ng5 36.Bc4+=) 36.Ne4 Red7 37.Rg4 Kf8 38.Rh4 (38.Kf1 f5 39.Rg6 fe4 40.Re6 Rd1 41.Rd1 Rd1 42.Bd1 Be6+/–) 38...Kg7 39.Rc2 f5 40.Ng3 (40.Nc5 Rd5+/–) 40...Kf6+= 41.Rc3 Rd2 42.Rhc4 Ng5 (42...Ng7 43.Rf4 Ke7 44.Bc4+=) 43.Rf4 R8d5 (43...Ke7 44.Kf1+/–) 44.Bc4 Rd1 45.Kh2 Re5 46.Bd3 Rd5 47.Bc2 R1d2 48.Rcc4 Nf7? (better is 48...Re5+/–) 49.Ne4+– (49.Ne4 Ke7 50.Nd2 Rd2 51.Bf5 Bf5 52.Rf5+–) 1–0. Hohlstein,Walter (2080) – Walter,Mario (2050), RSX9E – A00 – Sokolsky–2, 2004.

4.Bd2 Bd6 5.Bd3 (5.de5 Be5 6.Bc3 Qe7=) 5...e4–/+ 6.Be2 Nf6 7.Kf1 (7.c4 0-0–/+) 7...0-0 8.a4 (8.c4 dc4 9.Bc4 Nbd7–/+) 8...Qe7 9.b5 Be6 10.f3 (10.Ke1 Nbd7–/+) 10...cb5 (10...ef3 11.Nf3 Ne4 12.Nc3–+) 11.ab5–/+ Rc8 (11...ef3 12.Nf3 Rc8 13.Kg1–/+) 12.fe4 (12.Kf2 Qc7–+) 12...Ne4–+ 13.Bd3 Nd7 (13...Qh4 14.Be1 Qg5 15.Qf3–+) 14.Qf3 (14.Nf3 Ndf6–+) 14...Ndf6 15.g3 (15.Ke1 Bg4 16.Qf1 Ng3 (16...Nd2 17.Kd2 Ne4 18.Be4 Qe4 19.Nc3 Rc3 20.Ke1 Re3 21.Kd2 Qd4 22.Kc1 Qa1 23.Kd2 Qc3 24.Kc1 Ba3 25.Kb1 Qb2) 17.hg3 Bg3 18.Qf2 Bf2 19.Kf2 Ne4 20.Ke1 a6–+) 15...Bg4 16.Qg2 Nd2 (16...a6 17.Ke1–+) 17.Qd2 Ne4 18.Qe1 Bb4 19.c3 Nc3 20.Nd2 Nb5?? (20...Bd7 21.Kg2–+) 21.Qf2?? (21.Bb5 Rc2 22.e4 Bd2 23.Qf2 Qe4 24.Ba4–+) 21...Bc3–+ 22.Ra2 Bd2 (22...a6 23.Kg2–+) 23.Rd2 Rc1 24.Kg2 Nc3 25.Qf4 Bd7 (25...Ne4 26.Rb2 Bc8 27.Be4 Qe4 28.Qe4 de4 29.Ne2 Bh3 30.Kh3 Rh1 31.Kg2–+) 26.g4 (26.Rc2 Rc2 27.Bc2 Re8–+) 26...Rc8 27.Kf3?! (27.Nf3 Rh1 28.Kh1 Bb5–+) 27...Re8 (27...Ne4 28.Ra2–+) 28.g5 (28.Rc2 g5 29.Qe5 Qe5 30.de5 Rc2 31.Bc2 Re5–+) 28...Re1 29.Be2 (29.Bh7 Kh8 30.Bd3 Qe3 31.Qe3 R8e3 32.Kf2 Bb5–+) 29...Ne4 30.Rd3 (30.Rb2 Ng5 31.Kg2 b6–+) 30...Ng5 31.Kg2 Nh3! 32.Nh3 Bh3 33.Kh3 Rh1 34.Rc3 (34.Kg2 Re1 35.Bf3 Re3 36.Re3 Qe3 37.Qe3 Re3 38.Bd5 b5–+) 34...Rg1 (34...Re1 35.Qf3–+) 35.Qf5 g6 36.Qf4 g5 (36...Qe6 37.Bg4 f5 38.Be2–+) 37.Qf5 Qe4 38.Qg4 Qg4 (better is 38...Rg4 39.Bg4 f5 40.Bd1–+) 39.Bg4 Re4 40.Rc8 Kg7 41.Re8 Reg4 42.Re4 de4 43.d5 Rh4 0–1. Sargon 4 – Chessmaster 4000, computer chess game, 1994.

4.de5 Bb4 5.c3 Ba5 6.Nf3 Ne7 (6...Nd7 7.Ba3=) 7.Ba3 Ng6 8.Bd6 Bc7 9.c4 (9.Bc7 Qc7 10.Qd4 Be6=+) 9...Nd7 (9...Be6!?=+) 10.Qd4= dc4 11.Nc3 (11.Bc4 Nde5 12.Be5 Be5 13.Bf7 Kf7 14.Ne5 Ne5 15.Qe5 Re8 16.Qh5 Kg8=+) 11...b5=+ 12.e6 Nb6 (12...fe6 13.Bc7 Qc7 14.Qg7=+) 13.Bc7 (13.Qg7 Be6 (< 13...Qd6 14.ef7 Kd8 15.Rd1+=) 14.Be5 Nd5–/+) 13...Qc7 14.Qc5 Be6 (14...a6 15.ef7 Kf7 16.Rd1=+) 15.Nb5 Qe7 (15...cb5 16.Qc7) 16.Qc6 Kf8 17.Qd6 (17.0-0-0 Bd7 18.Rd7 Qd7 19.Qd7 Nd7–/+) 17...Bd5 (17...Qd6 18.Nd6 Ke7 19.0-0-0=+) 18.Qe7 (18.0-0-0 Qd6 19.Nd6 Ke7 20.Nf5 Kf6=+) 18...Ke7 19.Nfd4 Ne5 (19...Rhd8 20.a4 a5 21.Nc3=) 20.Nc3 (20.a4 a5=+) 20...Rad8 21.0-0-0= Ba8 22.Be2 Rhe8 23.f3 Rb8 24.Rd2 g6 25.Kc2 a6 26.Rb1 Kf8 27.e4+= Kg8 28.Rdd1 h5 29.h4 Kg7 30.a3 Kh7 31.Rb4+/– Nbd7 32.Na4 a5 33.Rb5+/– Bc6 34.Ra5 Ba4 35.Ra4 Nc5 36.Ra5 Ned3 37.Bd3 cd3 38.Kd2 Nb3 39.Nb3+– Rb3 40.Ke3 Rd8 41.Rd2 Kg7 42.a4 Ra3 43.g3 Rd6 44.Ra7 Kf6 45.f4 Rd8 46.e5 Ke6 47.Ke4 Rb3 48.a5 Ra3 49.Rb2 f5 50.ef6 Ra4 51.Ke3 Ra3 52.Ra6 Kf7 53.Rd2 Re8+/– 54.Kf2 Re6 55.Ra8 Kf6 56.Rf8 Ke7 57.Rb8 Ra5 58.Rd3 Rc6 59.Kf3 Ra1 60.Re3 Kf6 61.Rf8 Kg7 62.Rfe8 Rf1 63.Kg2 Rcc1 64.Rd8 Ra1 65.Rdd3 Kf6 66.Ra3 Rab1 67.Re2 Rg1 68.Kf3 Rgf1 69.Ke4 Rb4 70.Kd3 Rg1 71.Re3 Kf5 72.Ra5 Kf6 73.Ra6 Kf7 74.Ra3 Kf6 75.Rc3 Ra4 76.Rb3 Kf5 77.Rb5 Kf6 78.Rb6 Kg7 79.Rb3 ½–½. oldsage – pierred, ChessWorld.net, 2006.

4.de5 Bb4 5.Bd2 Bc5 6.Nf3 Ne7 7.c4 (7.Bc3 0-0+=) 7...0-0= 8.cd5 Nd5 9.Qc2 b6 10.Nc3 Nb4 11.Qb1 Ba6 12.Ba6 N8a6 13.a3 Nd5 14.0-0 Re8 15.Ne4 h6 16.Rd1 Qe7 17.Qc2 Rac8 (17...Rad8 18.h3+=) 18.Qa4 Qb7 19.Ng3 Re6 20.Qg4 Rce8 (20...Rg6!? 21.Qh5 Rd8+/–) 21.Nf5 Rg6 22.Qh3 Ne7 23.e4 Qb8 (23...Qc7 24.Bf4 Re6 25.Bg3+–) 24.Bf4+– Rd8 (24...Re6 25.Qg4 Rg6 26.Qh5+/–) 25.Bg3 (25.N3h4 Re6 26.Qg4 Ng6 27.Ng6 Rg6+–) 25...Rd1 (25...Qc8 26.Bh4 Kh7 27.Bg5+/–) 26.Rd1+– Qf8 (better is 26...Qe8+–) 27.Bh4 Kh7 (27...Re6 28.Be7 Be7 29.N3d4+–) 28.Rd7 Re6 29.Qg4 (29.Ra7?! Qd8 30.N3d4 Bd4 31.Be7 Qb8 32.Ra6 Qe5 33.Nd4 Qe4+–) 29...Ba3 (29...Ng6 30.Nh6! Kh6 31.Qg5 Kh7 32.Qh5 Kg8 33.Ng5+–) 30.Ra7 Ng6 (30...Nb8 31.Ra3 Nf5 32.Qf5 (32.ef5?! Qa3 33.h3 Re5 34.Ne5 Qa1 35.Kh2 Qe5 36.Bg3 Qe8+=) 32...g6 33.Qh3+–) 31.Nh6 (31.Ra6!? Bb2 32.Qh5 Kg8+–) 31...Re5 (31...Qc5 32.Ng5 Kh6 33.Nf7 Kh7+–) 32.Nf7 (32.Nf7 Rc5 33.g3+–; 32.Ra6?! Rb5 33.g3 gh6+/–) 1–0. Taulien,Hans_Juergen (2350) – Scholz,Sascha (2205), RS6D – A00 – Sokolsky Alt–1, 2004.

4.de5 Bb4 5.Bd2 Qe7 =+.

4.a3 Nf6=+ 5.Bb2 Bd6 6.Nf3 Qe7 7.d4 Nbd7 8.de5 Ne5 9.Nd4 (9.Ne5 Be5 10.Be5 Qe5=) 9...Bg4 (9...a5 10.ba5 0-0 11.0-0-/+) 10.f3 (better 10.Bg4!? Neg4 11.h3=) 10...Bd7-/+ 11.0-0 a5 12.f4? (better 12.ba5 Ra5 13.Qd2-/+) 12...Neg4-+ 13.Bg4 Bg4 (13...Ng4 14.Re1-+) 14.Nf3? (better 14.Qd3 ab4 15.ab4 Ra1 16.Ba1 Bb4 17.f5-+) 14...Qe3 15.Kh1 0-0 (15...Bf4? 16.Re1 Qe6 17.Re6 fe6 18.Bf6 gf6 19.Qe1+-; 15...Qf4?! 16.Qe1 Be6 17.Nbd2-+) 16.Bc1 Qe6 17.h3 (17.ba5 Rfe8-+) 17...Bh5 18.g4 (18.ba5 Ne4 (18...Ra5?! 19.g4-+) 19.g4 Bg4 20.hg4 Qg4-+) 18...Ng4! 19.hg4 Qg4 20.Qd4 (20.Kh2 ab4 21.a4 Rfe8-+) 20...Rfe8 (20...Qh3 21.Nh2 Rfe8 22.Qc3 Qc3 23.Nc3 ab4 24.Nd1 ba3 25.Kg2 Re2 26.Rf2-+) 21.Nbd2 (21.Nh2 Qh3 22.Bb2 Bf3 23.Rf3 Re1 24.Qg1 Rg1 25.Kg1 Qh5-+) 21…Bf4 ½-½. Shocker36 (1750) - DrJon (2710), ChessWorld.net, 2013.

4.Bb2!? Nd7 5.a3+=.

4.Nf3 Bb4?! 5.Ne5 Qe7 6.Bb2=.

4.Nf3 e4–/+ 5.Nd4 Qg5 6.0-0? (better is 6.Rg1–/+) 6...Bh3–+ Threatening mate... how? (6...Bb4?! 7.f4 Qh4 8.c4–/+) 7.g3 Bf1 8.Kf1 (8.Bf1 Bb4 9.f4 Qg6–+) 8...Bb4 9.c3 (9.f4 Qg6–+) 9...Bc5 10.h4 (10.f4 Qg6–+) 10...Qg6 11.Bh5 Qf6 12.Qg4 (12.d3 ed3 13.Qd3 Nd7–+) 12...Nd7 (12...Ne7 13.Qg5 Qg5 14.hg5–+) 13.Nf5 (13.Qe6 Qe6 14.Ne6–+) 13...g6 (13...g6 14.Qf4 gf5–+) 0–1. eduardobandeira (2100) – pierred (2595), net–chess.com, 2008.

4.b5 e6 5.Bb2 Nf6 6.a4 Bd6 7.Be2 0-0 8.0-0 Nbd7 9.d3 (9.d4 Qc7=) 9...cb5 10.ab5 a4 (10...e5 11.Ba3 Qc7 12.Bd6 Qd6 13.d4=) 11.Ba3 Qc7 12.h3 (12.d4 Nb6=) 12...b6 (12...e5 13.Bd6 Qd6 14.d4=) 13.Nbd2 (13.Nc3 Ba3 14.Ra3 Ra5+=) 13...Bb7 (13...Ba3 14.Ra3 Qc5 15.Qa1 Qb5 16.Rb1=) 14.d4 Rfc8 15.c4 Ba3 16.Ra3 Ne4 (16...dc4!? 17.Bc4 Bf3 18.Qf3 Qd6=) 17.Ra4?? (better 17.Ne4 de4 18.Nd2+/-) 17…Nc3 (17...Nc3 18.Ra8 Ba8=). onxisback (2150) - bikhial (2185), Rated Bullet game, lichess.org, 2014.

4.b5 Nf6 5.Be2 e6 6.0-0 Nbd7 7.a4 Bd6 8.Ba3 Ba3 9.Na3 0-0 10.c4 dc4 11.Nc4 Re8 (11...cb5 12.ab5 b6 13.d4+=) 12.d4+/- Nf8 (12...cb5 13.ab5 b6 14.Nfe5+/-) 13.Qc2 (13.bc6 bc6 14.Nce5 Bb7+/-) 13...Ng6 (13...cb5 14.ab5 b6 15.Rfc1+/-) 14.bc6 bc6 15.Nce5 Ba6 16.Rfc1 Be2 17.Qe2 Rc8 (17...Ne7 18.Ng5 Rf8 19.Rc5+/-) 18.Rc6 Ne5 19.Ne5 Rc6 20.Nc6 Qb6 21.Qb5 Qc7 22.Na5 Rb8 (22...Rc8 23.h3+-) 23.Qc5 Qd8? (23...Qd7 24.Nc6 Ra8+-) 24.Nc6 Ne4 (24...Nd7 25.Qc4 (worse 25.Nd8 Nc5 26.Nc6 Rb6 27.Ne7 Kf8 28.dc5 Ra6+-) 25...Qf8 26.Nb8 Qb8 27.a5+-) 25.Nd8 (better 25.Qe5 Qd6 26.Qd6 Nd6 27.Nb8 g5+-) 25...Nc5 26.dc5 (better 26.Nc6 Rb6 27.Ne7 Kf8 28.dc5 Ra6+-) 26...Rd8 27.a5 Ra8 28.a6 Kf8 29.a7 Ke8 30.Ra6 Kd7 31.Kf1 Kc7 32.c6 f6 33.Ke2 e5 34.Kd3 f5 35.Kc4 g5 (35...Kd6 36.Kb5 Kc7 37.Ra2+-) 36.Kd5 Rd8 (36...f4 37.Ke5 fe3 38.fe3+-) 37.Ke5 Ra8 (37...f4 38.ef4 gf4 39.a8Q Ra8 40.Ra8 Kc6 41.Kf4+-) 38.Kf5 Rf8 (38...h6 39.Kg6+-) 39.Kg5 Ra8 40.Kh6 Rg8 41.e4 Ra8 42.e5 Rf8 43.a8Q Ra8 44.Ra8 1-0. onxisback (2200) - bikhial (2140), Rated Bullet game, lichess.org, 2014.

4.a3 a5 5.ba5 (5.b5 Bg4=) 5...Ra5 (5...Qa5 6.Bb2=) 6.d4 Bf5 (6...Nf6 7.c4=) 7.Nh4 (7.c4 Nf6+= (worse is 7...Bb1 8.c5 Qc7 9.Rb1+/–)) 7...Be6 (7...Bd7 8.c4=) 8.Bd2 (8.Bd3 Nf6+=) 8...Ra8 9.Be2 (9.Bd3 Nf6+=) 9...Nf6= 10.Nc3 (10.0-0 Ne4 11.Nc3 Nd2 12.Qd2 Bd7=) 10...g6 (10...Bd7 11.Nf3=) 11.Rb1 (11.Nf3 Bg7=) 11...Qc7 12.Rb3 Nbd7 13.0-0 Bg7 14.Be1 (14.Bd3 0-0=) 14...0-0 15.f4 b5 16.f5 gf5 17.Nf5 Bf5 18.Rf5 Ne8 (18...e6 19.Bg3 Qd8 20.Rf1=) 19.Bg3 (19.Bd3 Nd6 20.Bg3 e5+=) 19...e5 (19...Nd6 20.Rh5=) 20.de5 Nc5 21.e6 Qb7 (21...Qe7 22.ef7 Rf7 23.Nd5 cd5 24.Qd5 Nb3 25.Rf7 Qf7 26.Qa8 Nc1 27.Bb5 Bf8+–) 22.ef7 (22.Nd5 fe6 23.Rf8 Bf8 24.Nf4 Nb3 25.cb3+=) 22...Rf7–/+ 23.Rf7 Qb6?? (better is 23...Kf7 24.Nb1 Nb3 25.cb3 Kg8–/+) 24.Nd5+– Nb3 (24...Qd8 25.Rg7 Ng7 26.Rc3+–) 25.Bc4 (better is 25.Nb6 Nc1 26.Bb5 cb5 27.Rg7 Kg7 28.Na8 b4 29.ab4 Kf7+–) 25...bc4 (25...Qc5 26.Ne7 Kh8+–) 26.cb3 (better is 26.Nb6 Kf7 27.Na8+–) 26...cd5 27.bc4 (better is 27.Qd5!? Qe3 28.Kh1–/+) 27...Ra3 (27...Ra3 28.Qd5 Qe3 29.Kh1 Rd3 30.Re7 Rd5 31.Re3 Rd1 32.Re1 Re1 33.Be1 Kf7–+; 27...Qe3!? 28.Bf2 Qe4 29.Re7 Qc4 30.Qh5–+) 0–1. Reyes,Jorge Daniel – Rudbeck,Joergen, corr 3GMM–54, 1997.

4.a3 Nd7 5.c4 a5 6.ba5 Qa5 7.cd5 cd5 8.Nc3 +=.

4.a3 Nf6 5.c4 (5.Bb2 Nbd7+=) 5...Bg4 (5...a5 6.c5 Qc7 7.Bb2=) 6.d4 (6.Nc3 Nbd7+=) 6...dc4 (6...a5 7.b5+=) 7.Bc4+= e6 8.Nbd2 a5 9.Qa4 Nbd7 10.Be2 Be7 11.0-0 Nd5 12.Bb2 0-0 13.Nc4 Qd8 14.b5 (14.Qb3 ab4 15.ab4 b5=) 14...N7b6+= 15.Nb6 Qb6 16.Rab1 Rfc8 17.Rfd1 cb5 (17...Bf5 18.Rbc1+=) 18.Qb5= Qb5 19.Bb5 Bf3 20.gf3 Nc3 21.Bc3 Rc3 22.a4 g6 23.Rbc1 ½–½. Malmstroem,Jan – Papakosmos,Lambros, corr TKM/A009, 1999.

4.Bb2 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

4.c4 e5 5.Bb2 (5.cd5 cd5 6.Qb3=) 5...a5 (5...e4 6.Nd4=+) 6.ba5 (6.cd5 e4 7.dc6 bc6+=) 6...Ra5 (6...e4!? 7.Ne5 Ne5 8.Be5 dc4=) 7.Ne5 Qb6 (7...Ne5 8.Be5 dc4 9.Bc3+=) 8.Qc2 Ne5 9.Be5 f6 (9...Ne7!?+–) 10.Bc3 Ra8 11.cd5 cd5 12.Bd3 Bd6 13.Bh7 Nh6? (better 13...Ne7 14.Bd3 Nc6+–) 14.Qg6 (14.Qg6 Nf7 15.Qg7+–) 1–0. Markzela (1725) – Tea_Rex_64 (1790), lichess.org, 2020.

4.a3 e4 5.Nd4 Qf6 6.Bb2 Qg6 7.Nc3 Bd6 8.d3 Nf6 9.de4 Ne4 10.Ne4 de4 11.c4 Bf5?? (11...0-0 12.Qc2=) 12.c5 (better 12.Nf5 Bf8 13.Ng3+-) 12...Bc7 (better 12...Be5!?=) 13.Nf5+/- Qf5 14.Be2 (14.Bg7 Rg8 15.Bd4+/-) 14...Nd7? (better 14...0-0+=) 15.Bg4+- (15.Bg7?! Rg8 16.g4 Qg6+=) 15...Qg5?? (better 15...Qd5 16.Qd5 cd5+-) 16.Qd7 (worse 16.Bd7 Kf8 17.Qg4 Qg4 18.Bg4 Re8+-) 16...Kf8 17.Qc7 (better 17.Bh3 Qd8 18.Rd1+-) 17...Re8 (17...Qg4 18.Qb7 Rd8+-) 18.Be2 (better 18.Bd7 Qe7+-) 18...Qg2 (18...Qe7 19.Qg3 f6+-) 19.0-0-0 Qf2 20.Rhe1 (20.Qd6 Re7 21.Qd8 Re8 22.Bg7 Kg8 23.Qe8 Kg7 24.Qe5 Kg6 25.Rhg1 Qg1 26.Rg1 Kh6 27.Qf6) 20...Qe3 (20...h5 21.Kb1 Qf5 22.Bc4+-) 21.Kb1 Qb3 22.Qb7 (22.Bg4 f6 23.Rd7 Qd5 24.Rd5 Re7 25.Rd7 h5 26.Re7 Kg8 27.Rg7 Kf8 28.Qe7) 22...e3 (22...h5 23.Rd7 Qe6 24.Rc1+-) 23.Qc6 g6 24.Qd6 (24.Qd6 Kg8 25.Bc4 Qb2 26.Kb2 Kg7 27.Qd4 f6 28.Qd7 Re7 29.Qe7 Kh6 30.Re3 Re8 31.Rh3 Kg5 32.Rg1 Kf4 33.Qf6 Ke4 34.Re1) 1-0. houdjini (2280) - chess_9000-elo (2095), Rated Bullet game, lichess.org, 2014.

4.Ne5 Bb4 5.c4 Nf6 6.Bb2 0-0=+ 7.Bd3 Bd6 8.0-0 Be6 9.f4 Be5 (better 9...Nbd7!?=) 10.fe5+– (worse 10.Be5 dc4 11.Be2 Nbd7–/+) 10...dc4 (better 10...Nfd7 11.Qc2 dc4 12.Bh7 Kh8+–) 11.Bc2 (better 11.ef6!? Qd3 12.fg7+=) 11...Nfd7 (11...Nd5 12.Nc3=) 12.Nc3 (12.d4!?+=) 12...Nc5 13.Ne4 Ne4 14.Be4 g6 (14...Nd7 15.Qb1=) 15.Bd4 (15.Ba3 Nd7 16.Rb1 Qa5=) 15...Nd7 16.Qf3 Qe7 17.Rab1 Nc5 18.Bc2 Rfe8 19.Qf4 b6 20.Qh6 Rab8 21.Rf6 Nd3 22.Rbf1 (22.Bd3!? cd3 23.a4=+) 22...c5–/+ 23.Ba1 Qf8 24.Qg5 Re7 (24...b5 25.h4–/+) 25.a4 a6 26.h4 (26.Bd3 cd3 27.h4 Qg7=+) 26...Qg7 (26...Rd8 27.h5 Qe8 28.Qh6=+) 27.h5 h6 (27...gh5 28.Qh5 b5 29.Qh2=+) 28.Qh4=+ g5 29.Qe4 (29.Qg3 Rd8=+) 29...Nb4 30.Bb1 b5 (30...Rf8=+) 31.Qf3–/+ g4 (31...Nd5 32.Bf5 Qf8 33.Re6 fe6 34.Be6 Re6 35.Qd5=) 32.Qf4 (32.Qg3 Rd8 (32...ba4 33.Bf5 Rbb7 34.Rf4 Bf5 35.R6f5+–) 33.Bf5 Rd2 34.Be6 Re6+– (worse 34...fe6 35.Qf4 Rd8 36.Rg6 Qg6 37.hg6+–)) 32...Nd5 (32...ba4 A) 33.Rh6 Nd5 34.Re6 A1) 34...fe6?! 35.Qc4 Qg5 36.Bg6=+ (36.Qa6?? g3 37.Bf5 ef5–+; 36.Qa4? Qh5 37.g3 Qh3–+); A2) worse 34...Re6 35.Qc4 Rd8 36.Bf5+– (36.Qc5?! Qg5=); A3) 34...Nf4 35.Re7 Qg5 36.ef4 Qe7–+; B) 33.Be4 Nd3 34.Bd3 (34.Qh6? Qh6 35.Rh6 a3–+) 34...cd3 35.Qa4=+ (35.Rh6? Rb4 36.e4 Re4 37.Qe4 Qh6 38.Qd3 Rd7–+)) 33.Qg3=+ Rd7 (33...ba4 34.Be4 Rd8 35.Bf5=) 34.Bf5= Re8 (34...Nf6 35.ef6 Qf8 36.Be6+–) 35.Be6 Re6 (35...fe6?? 36.Rg6 Qg6 37.hg6+–) 36.R6f2 Kh7 (36...b4 37.e4 Nb6 38.Rf4=) 37.a5 (37.e4 Nb4 38.Rf4 Nd3 (38...Rd2 39.Rf7 Rd7 40.Rg7 Rg7 41.Qf2 Rb6 42.Qf5 Rbg6 43.hg6 Rg6 44.Qf8 Nd5 45.Rf7 Rg7 46.Rg7) 39.Rg4 Qh8+–) 37...Qg8 (37...Kh8 38.e4 Nb4 39.Rf4=) 38.e4= Nb4 39.Rf4 Nc2 (39...Nd3 40.Rg4 Qh8 41.Qe3 Ne5 42.Qf4+–) 40.Rg4+= Qf8 41.Rg6 Rde7 (41...Qe8 42.Rg7 Kh8 43.Bb2+=) 42.Bb2 (42.Qg4!? Qe8 43.Rg7 Kh8 44.Bb2+=) 42...Nd4= 43.Qe3 b4 (43...Re5 44.Ra6 b4 45.Bd4 cd4 46.Qd4 Re4 47.Qd5+–) 44.Bd4+= cd4 45.Qd4 Qc8 46.Re6 (46.Rgf6 Qc7+=) 46...Qe6= 47.d3 cd3 48.Qd3 b3 49.Rb1 Qe5 50.Rb3 (50.Qa6 A) 50...Qe4?! 51.Qf1=+ (51.Rb3?? Qd4 52.Kh2 Qh4 53.Rh3 Qf4 54.Rg3 Re3–+); B) 50...Qc5 51.Kh2 Qh5 52.Kg1 Qc5 53.Kh2 Qc7 54.Kh1 b2–+) 50...Qc5 51.Qe3 Qa5 52.Rb6 Qa1 ½–½. acalado58 (2165) – forsetinn (2425), gameknot.com, 2015.

4.Ne5 Bb4 5.c4 Nf6 6.Qb3 Qe7 7.Bb2 0-0 8.cd5 Nd5 9.Nc3 Qe5 10.Nd5 Bd2 11.Kd2 Qd5 12.Qd5 cd5 13.Rc1 Rd8 14.Rc7 Nc6 15.Bb5 Na5 16.Bd4 a6 17.Bd3 b5 18.Rhc1 Nc4 19.Ke2 Be6 20.f3 h5 21.h4 a5 22.Rb7 b4 23.Rc7 Rab8 24.Ra7 Rdc8 25.Bc4 (25.Kf2 Rc6=) 25...dc4+= 26.Ra5 c3 (26...Ra8 27.Ra8 Ra8 28.Ra1+=) 27.Rb1 Bc4 28.Ke1 f6 29.Ra4 The backward pawn on b4 becomes a target (29.Rh5? Ba2 30.Rc1 Rc4–+) 29...Bd3 30.Rbb4 Rb4 31.Rb4 c2 32.Bb2 c1Q 33.Bc1 Rc1 34.Kd2 Rb1 35.Rb1 Bb1 36.a4 Bf5 37.e4 Bc8 38.Ke3 Kf7 39.Kf4 g6 40.e5 Bb7 41.ef6 Kf6 42.a5 Bc8 0–1. kostini (1990) – forsetinn (2365), gameknot.com, 2014.

4.Ne5 Bb4 5.Be2 Nf6 6.0-0 Nbd7 7.Nf3 0-0 8.d3 (8.Bb2 Qe7=) 8...Bd6=+ 9.Nbd2 b5 10.Bb2 Nc5 11.Rc1 Bf5 12.Nb3 Na4 13.Ba1 Rc8 14.Nh4 Bd7 15.c4 Qe7 16.Qc2 (16.Nd4 g6–/+) 16...Ba3 (16...bc4 17.Nd4 cd3 18.Bd3+=) 17.Rcd1=+ a6 18.Nd4 g6 19.Nhf3 Bd6 20.Nb3 c5 21.Rfe1 Rfe8 22.h3 Bc6 23.cd5 Nd5 (worse 23...Bd5 24.e4 c4 25.ed5 cb3 26.Qb3=) 24.e4 Ndb6 (24...Nf4 25.Bf1=+) 25.Qc1 Qc7 (25...f6 26.Na5=) 26.g3 (26.e5 Be7= (worse 26...Be5 27.Be5 Re5 28.Ne5 Qe5 29.d4 cd4 30.Bg4+–)) 26...Bd7 (26...Nd7 27.Qd2=+) 27.e5 Bf8 28.Ng5 Bh6 (28...Bg7 29.f4=+) 29.h4= Bg7 Will e5 fall? 30.f4 Bf5 31.h5 Nd5 32.g4 Be6 33.Bf3 Bh6?? (33...Qc6 34.f5 gf5 35.Ne6 fe6 36.gf5 ef5 37.h6 Bh6 38.Bd5 Qd5 39.Qh6+–) 34.Ne6?? (34.f5 Qe7 A) 35.fe6? fe6 36.Bd5 ed5–+ (36...Bg5?! 37.Be6 Kg7 38.Bc8 Bc1 39.Bd7=+); B) 35.f6–/+) 34...fe6= 35.Bd5 ed5 36.Qe3 Qf7 37.g5 Bg7 38.Rd2 d4 39.Qg3 gh5 (39...Nc3 40.Rc2 Nd5 41.hg6 (worse 41.Nc5 Qf4 42.Qf4 Nf4 43.Bd4 Bf8 44.hg6 hg6–+) 41...hg6 42.Rc5 (42.Nc5? Qf4 43.Qf4 Nf4 44.Bd4 Bf8–+) 42...Rc5 43.Nc5 Nf4 44.Bd4=+) 40.Rf2 Qf5 41.Kg2 (41.Nd2 Rc6=) 41...Nc3=+ 42.Qf3 Red8 43.Bb2 Nd5 44.Bc1 Nb4 45.Rd1 Rc7 46.Kh2 (46.Kg1 Bf8=+) 46...Rf8–/+ 47.a3 Nc6 48.Rdf1 (48.Nc5?? Ne5 49.fe5 Qf3 50.Rf3 Rf3–+ (50...Rc5?! 51.Rf8 Bf8 52.Bf4–+)) 48...Ne7 49.Nd2 Qg6 50.Qh3 Nf5 51.Ne4 c4 (51...h4 52.Bd2=+) 52.Nf6=+ Kh8 53.Nh5 c3 (53...cd3 54.Ng7 Kg7=+) 54.Ng3 (54.Nf6 c2=) 54...a5 (54...Ne3 55.f5 Qg5=+ (worse 55...Nf1 56.Qf1 Qc6 57.f6+–)) 55.Nf5=+ Rf5 56.Qg2 Rf8 57.Qh3 b4 58.Re1 White prepares e6 58...Rcf7 (58...Rf5 59.ab4 ab4 60.Qg2=+) 59.e6 Rf5 60.e7 Re8 61.ab4 ab4 62.Qg4 b3 63.Kh3 h6 64.gh6 Qh5 (64...Rh5 65.Kg3 Rh6 66.f5 Qg4 67.Kg4–+) 65.Qh5 (65.Kg3 Bf6 66.Ba3–/+) 65...Rh5–/+ 66.Kg4 Rh6 67.f5 Rf6 68.Re5 (68.Bg5 Kg8–/+) 68...Rb6 (68...Kg8 69.Rb5 b2 70.Bg5–+) 69.Re1–/+ Kg8 70.Rh2? (better 70.Bg5 Bf6 71.Bf6 Rf6 72.Rh2–+) 70...Kf7 71.Ba3 Ra6 72.Bb4 (72.Bc5 b2 73.Rh7–+) 72…b2 (72...b2 73.Rb1 Ra1 74.Rhb2 cb2 75.Rb2 Rf1–+) 0–1. the_great_omni (2320) – forsetinn (2350), gameknot.com, 2015.

4.a3 A) 4...Nf6 A1) 5.Bb2 e6 (5...a5 6.b5 e6 7.Be2 Bg4 8.Nc3 Bd6) 6.Be2 Bg4 7.Nc3 Bd6 8.0-0 b5; A2) 5.Be2 e6 (5...Bg4 6.Bb2 e6 7.Nc3 Bd6 8.h3 Bf3; 5...a5 6.b5 Bg4 7.Nc3 e6 8.Bb2 Bd6) 6.Nh4 Be4 7.d3 Bg6 8.Nc3 b5; B) 4...Nh6 B1) 5.Nc3 e6 (5...Qd6 6.d3 Bg4 7.h3 Bf3 8.Qf3 Nd7; 5...Nd7 6.d3 a5 7.b5 Nf6 8.Bb2 e6; 5...b6 6.Bb2 e6 7.Be2 b5 8.0-0 a5) 6.Bb2 Nd7 7.d3 Nf6 8.h3 Bg6; B2) 5.Be2 Qd6 (5...Nd7 6.Bb2 Qc7 7.c4 dc4 8.Bc4 e5; 5...Qc7 6.Bb2 Nd7 7.Nh4 e5 8.Nf5 Nf5; 5...f6 6.0-0 e5 7.Nc3 b5 8.a4 Bb4; 5...e6 6.Bb2 f6 7.0-0 Bd6 8.Nd4 Qe7) 6.d4 Nd7 7.0-0 e5 8.de5 Ne5; C) 4...e6 C1) 5.Be2 Qf6 (5...Bd6 6.Bb2 Nf6 7.Nh4 Be4 8.d3 Bg6; 5...Nf6 6.Nh4 Be4 7.d3 Bg6 8.Nc3 b5) 6.Nc3 Bd6 7.Bb2 e5 8.d3 Be6; C2) 5.Bb2 Nf6 (5...a5 6.b5 Nf6 7.Be2 Bg4 8.Nc3 Bd6) 6.Be2 Bg4 7.Nc3 Bd6 8.h3 Bf3.

4.Bb2 A) 4...e6 A1) 5.Be2 Nf6 (5...Qb6 6.a3 c5 7.Nh4 Nh6 8.b5 a6) 6.a3 Bd6 7.Nh4 Be4 8.d3 Bg6; A2) 5.b5 Nf6 (5...a6 6.bc6 Nc6 7.Be2 Rc8 8.Nc3 e5; 5...c5 6.Be2 Nd7 7.0-0 Ngf6 8.Nh4 Bg6) 6.Be2 Bd6 7.Nh4 Be4 8.d3 Bg6; A3) 5.a3 Nf6 (5...a5 6.b5 Nf6 7.Be2 Bg4 8.Nc3 Bd6) 6.Be2 Bd6 7.Nh4 Be4 8.d3 Bg6; B) 4...f6 5.Nh4 (5.Nd4 Bc8 6.f4 Qd6 7.a3 e5 8.fe5 fe5) 5...Nh6 6.Nf5 Nf5 7.Bd3 e6 8.Qg4 Qd7; C) 4...Nf6= C1) 5.Be2 e6 (5...Bg4 6.Bf6 ef6 7.a3 Bd6 8.Nd4 Bd7; 5...Qb6 6.a3 c5 7.b5 a6 8.Nc3 Qc7) 6.a3 Bg4 7.Nc3 Bd6 8.0-0 Bf3; C2) 5.a3 e6 (5...a5 6.b5 e6 7.Be2 Bg4 8.Nc3 Bd6; 5...Bg4 6.h3 Bh5 7.Be2 e6 8.g4 Bg6) 6.Be2 Bg4 7.Nc3 Bd6 8.h3 Bf3.

4.c4 Nf6 5.Qb3 e6 6.Nc3 a5 (better 6...dc4 7.Bc4 b5=+) 7.a3?? (better 7.ba5 Qc7 8.Nh4=) 7...ab4-+ 8.ab4?? (better 8.cd5 bc3 9.Qb7 cd2 10.Nd2-+) 8...Ra1 9.d4 (9.Qb2 Ra7 10.Nh4-+) 9...Rc1 10.Kd2 Ra1 (better 10...dc4 11.Qa3 Rc2 12.Ke1-+) 11.Be2 (11.Qb2 Ra8 12.c5-+) 11...Rh1 12.Nh4 Rh2 (better 12...Ne4 13.Ne4 Be4 14.Nf3-+) 13.Nf5 ef5 14.g3 Rf2 15.Ke1 Rh2 16.cd5 Nd5 17.b5 Nc3 (better 17...Bb4 18.Qb4 Nb4 19.bc6-+) 18.Qc3 cb5 (18...Qd6!? 19.Kd1-+) 19.Bb5 Nc6! 20.Qc5 (20.Bc6 bc6 Combination) 20…Bc5 (20...Bc5 21.Bc6 bc6 22.Kf1 Qb8 23.Kg1 Qg3 24.Kf1 Qf2; 20...Qa5 21.Qc3 Qc3 22.Kd1 Qd2) 0-1. ClayPigeons (2095) - ZenchayS (2120), Rated Bullet game, lichess.org, 2021.

4.Be2 Qd6 A) 5.c3 e5 (5...Nd7 6.Nh4 Bb1 7.Rb1 Qf6 8.g3 e5; 5...Nf6 6.d4 Nbd7 7.0-0 e5 8.b5 Qc7) 6.Ba3 Nd7 7.b5 c5 8.d4 Qe6; B) 5.Nd4 Be4 (5...Bc8 6.a3 Qg6 7.0-0 Bh3 8.Bf3 e5; 5...Bd7 6.a3 e5 7.Nf3 e4 8.Nd4 Qg6; 5...Bg6 6.a3 e5 7.Nf3 Nf6 8.d4 e4) 6.f3 Bg6 7.f4 e5 8.fe5 Qe5; C) 5.Nc3= Qb4 (5...e5 6.0-0 Nf6 7.a3 Be7 8.Nh4 Bd7; 5...Nf6 6.0-0 e5 7.a3 Be7 8.Bb2 Nbd7) 6.Rb1 Qg4 7.Rb7 Bc8 8.Rb3 Qg2.

4.Be2 Nf6 5.a3 (5.Bb2 e6 (5...Qb6 6.a3 c5 7.Bc3 e6 8.bc5 Bc5) 6.a3 Be4 7.Nc3 Bf3 8.Bf3 Bd6) 5...Nbd7 (5...e6 6.Nh4 Be4 7.d3 Bg6 8.Nc3 b5; 5...Bg4 6.Bb2 e6 7.Nc3 Bd6 8.h3 Bf3; 5...a5 6.b5 e6 7.Nh4 Be4 8.f3 Bg6) 6.0-0 (6.Nh4 Bg6= 7.0-0 e5 8.Bb2 Bd6; 6.Bb2 Bg4 7.0-0 e6 8.d3 a5) 6...e6 (6...e5 7.Nh4 Be6 8.Bb2+= Bd6) 7.d3 (7.Nh4 Be4= (7...Bg6 8.Bb2 Bd6) 8.f3 Bg6) 7...Bd6 8.Bb2 (8.c4 e5) 8...0-0 (8...a5+=) 9.Nbd2 Qe7 10.Nb3 (10.c4 e5=) 10...e5+= 11.c4 dc4 12.dc4 Rad8 (12...Rfd8 13.Na5 Bc7 14.Qa4+=) 13.c5 (13.Nh4 Be6=) 13...Bc7 14.Qc1 (14.Nh4 Be6 15.Qc2 Bd5=) 14...e4 15.Nfd4 Bg6 (15...Bg4 16.Qd2+=) 16.Rd1 (16.b5 cb5 17.c6 Nb8 18.cb7 a6=) 16...Qe5 17.g3 Qg5 18.Nd2 h5 (18...Bh5 19.f4 Qg6 20.Bh5 Qh5 21.Qc2=) 19.Nc4 (19.h4 Qh6+=) 19...h4= 20.f4 Qh6 (20...ef3!? 21.Nf3 Qh5+=) 21.g4+= Nd5 22.g5 Qh7 23.Bg4 h3 24.Rf1 (24.Qc2 Qh4 25.Be2 Bf4 26.ef4 Nf4–/+) 24...a6 (24...Qh4 25.Be2=) 25.Qd1 (better is 25.Qe1+=) 25...b5? (25...f5 26.gf6 N7f6 27.Be6 Bf7 28.Qe1=) 26.f5?? (better is 26.Nc6 Nb8 27.Nd8 Rd8 28.Be5 Nb4 29.ab4 (29.Bc7 Rd1 30.Rad1 N4c6+/–) 29...Rd1 30.Rfd1 (30.Rad1?! Qh4 31.Be2 Bh5+=; 30.Bd1?! Be5 31.Ne5 Bf5+–) 30...bc4 31.Bc7+/–) 26...bc4= 27.fg6? (better is 27.Nc6 Ne3 28.fg6+=) 27...fg6?? (better is 27...Qg6 28.Bc1 Ne5 (28...Qg5?! 29.Rf5 Qg6 30.Kh1–+) 29.Bh3 Qg5 30.Kh1 Qh6–+) 28.Qe2?? (better is 28.Nc6 Rf1 29.Qf1+–) 28...c3= 29.Bc1 (29.Bd7 Rd7 30.Rf8 Kf8 31.Bc3 Ke8=) 29...Rf1 (29...Ne5!? 30.Be6 Kh8 31.Rf8 Rf8 32.Bd5 cd5–+) 30.Qf1+= Ne5 31.Bh3?? (31.Be6 Kh8 A) 32.Qa6 Nd3 33.Ra2 Qh5–+; B) 32.Bh3? Ng4 33.Ne6 Nge3–+ (worse is 33...Bh2 34.Kh1 Nde3 35.Be3 Ne3 36.Qe2–+); C) 32.Qh3=) 31...Rf8?? (better is 31...Ng4! 32.Ra2 Nde3 33.Be3 Ne3 34.Be6 Kh8–+) 32.Qg2?? (better is 32.Be6 Nf7 33.Ra2+–) 32...Nf3 (32...Qh5 33.Be6 Kh7 34.Qh3+= (34.Qe4 Qd1 35.Kg2 Qf1 36.Kg3 Nf3 37.Qf4 Nf4 38.ef4 Nd4 39.Bg4 Rf4 40.Bf4 Bf4 41.Kh4 Qf2 42.Kh3 Qh2)) 33.Nf3= ef3 34.Qg4 f2 35.Kf1 Bh2 36.e4 (36.Ra2!? Bg1 37.e4=) 36...Nf4–/+ 37.Bf4 Bf4 (37...Rf4?? 38.Qc8 Kf7 39.Be6 Ke7 40.Qd7 Kf8 41.Qd8) 38.Ra2 (38.Qf3 Qh5 39.Qh5 gh5–/+) 38...Bg5 39.Rc2 Qh5 (better is 39...Bd2!?–/+) 40.Qh5 (40.Rf2?? Rf2 41.Kf2 c2 42.Qh5 gh5 43.Be6 Kf8–+; 40.Rc3?! Qh6=) 40...gh5 41.Rc3 Bd2 (41...Bh4!?=) 42.Rd3+= Be1 43.e5 (43.Be6 Kh7+=) 43...g5 (43...Re8 44.e6 g5 45.Rd6+=) 44.Bg2 (44.Bd7 Kf7+=) 44...Rc8 (44...Re8 45.Bc6 Re5 46.Bd7+/–) 45.Rd6 g4 46.Rh6 1–0. leighcastle – TeaCzar, ChessWorld.net, 2009.

4.a3 a5 A) 5.Bb2 A1) 5...e6 6.b5 (6.Nc3 ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Be2 0-0 10.0-0) 6...Nbd7 7.Nc3 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3; A2) 5...Nbd7 6.b5 (6.Nc3 e5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.h3) 6...e6 7.Nc3 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3; A3) 5...ab4 6.ab4 Ra1 7.Ba1 e6 8.b5 Nbd7 9.Nc3 Bd6 10.Be2; B) 5.b5 B1) 5...Qd6 6.Bb2 (6.Nc3 Nbd7 7.d4 e5 8.Be2 Be7 9.0-0 0-0 10.a4) 6...Nbd7 7.Nc3 g6 8.Be2 Bg7 9.0-0 0-0 10.bc6; B2) 5...Nbd7 6.Nc3 (6.Bb2 e6 7.Nc3 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3) 6...e5 7.bc6 bc6 8.Rb1 Bd6 9.Be2 0-0 10.0-0; B3) 5...e6 6.Nc3 (6.Bb2 Bd6 7.Be2 Nbd7 8.Nc3 0-0 9.0-0 Qc7 10.g3) 6...Bd6 7.Be2 0-0 8.0-0 Nbd7 9.Bb2 Qc7 10.g3.

4.a3 Nbd7 A) 5.Nc3 A1) 5...e6 6.Bb2 (6.Be2 a5 7.b5 Bd6 8.Bb2 0-0 9.0-0 Qc7 10.g3) 6...a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3; A2) 5...e5 6.Be2 (6.h3 Bd6 7.Be2 a5 8.b5 0-0 9.bc6 bc6 10.Rb1) 6...Bd6 7.h3 a5 8.b5 0-0 9.0-0 Qc7 10.Rb1; B) 5.Be2 B1) 5...a5 6.b5 e6 7.Nc3 Bd6 8.Bb2 0-0 9.0-0 Qc7 10.g3; B2) 5...e6 6.Nc3 (6.Bb2 a5 7.b5 Bd6 8.Nc3 0-0 9.0-0 Qc7 10.g3) 6...a5 7.b5 Bd6 8.0-0 0-0 9.Bb2 Qc7 10.g3; B3) 5...e5 6.Nc3 (6.0-0 Bd6 7.Bb2 0-0 8.Nc3 a5 9.b5 Qc7 10.h3) 6...Bd6 7.0-0 0-0 8.Bb2 a5 9.b5 Qc7 10.h3; C) 5.Bb2 e6 (5...a5 6.b5 e6 7.Be2 Bd6 8.Nc3 0-0 9.0-0 Qc7 10.g3) 6.Nc3 (6.Be2 a5 7.b5 Bd6 8.Nc3 0-0 9.0-0 Qc7 10.g3) 6...a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3.

4.a3 e5 5.Bb2 e4 6.Nd4 c5 7.bc5 Bc5 8.Nb3 Be7 9.Nc3 0-0 10.Be2.

4.a3 e5 5.Ne5 A) 5...Nbd7 6.Bb2 (6.Nd3 Bd6 7.Bb2 0-0 8.Be2 Nb6 9.Bd4 Na4 10.0-0) 6...Bd6 7.Nf3 0-0 8.Nc3 a5 9.Be2 ab4 10.ab4; B) 5...a5 6.b5 (6.Bb2 Bd6 7.Nd3 ab4 8.ab4 Ra1 9.Ba1 0-0 10.Bd4) 6...Bd6 7.Nf3 0-0 8.Nc3 Nbd7 9.Be2 Nc5 10.Nd4; C) 5...Bd6 6.Bb2 (6.Nf3 a5 7.b5 0-0 8.Nc3 Nbd7 9.Be2 Nc5 10.Nd4) 6...0-0 7.Nd3 Bf5 8.Nc3 a5 9.Be2 Re8 10.b5.

4.a3 e6 A) 5.Bb2 A1) 5...Nbd7 6.Nc3 (6.Be2 a5 7.b5 Bd6 8.Nc3 0-0 9.0-0 Qc7 10.g3) 6...a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3; A2) 5...c5 6.bc5 (6.b5 Nbd7 7.Nc3 Bd6 8.Be2 0-0 9.0-0 e5 10.d3) 6...Bc5 7.Bd3 Nc6 8.0-0 0-0 9.h3 Bd7 10.Qe2; A3) 5...a5 6.b5 (6.Nc3 ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Be2 Nbd7 10.0-0) 6...Bd6 7.Nc3 0-0 8.Be2 e5 9.bc6 Nc6 10.Nb5; B) 5.Be2 B1) 5...Nbd7 6.Bb2 (6.0-0 a5 7.b5 Bd6 8.Nc3 Qc7 9.g3 0-0 10.Bb2) 6...a5 7.b5 Bd6 8.Nc3 0-0 9.0-0 Qc7 10.g3; B2) 5...Bd6 6.Bb2 (6.Nc3 a5 7.b5 Nbd7 8.0-0 0-0 9.Bb2 Qc7 10.g3) 6...a5 7.Nc3 0-0 8.b5 e5 9.bc6 Nc6 10.Nb5; B3) 5...a5 6.b5 cb5 7.Bb5 Nc6 8.0-0 Bd6 9.c4 0-0 10.Nc3; C) 5.Bd3 C1) 5...Nbd7 6.Bb2 (6.Nc3 a5 7.b5 Bd6 8.a4 0-0 9.0-0 e5 10.bc6) 6...a5 7.Nc3 e5 8.Bf5 ab4 9.ab4 Ra1 10.Qa1; C2) 5...a5 6.b5 Bd6 7.Bb2 Nbd7 8.Nc3 Nc5 9.0-0 0-0 10.a4; D) 5.Nc3 D1) 5...Bd6 6.Be2 (6.Bd3 0-0 7.0-0 e5 8.e4 d4 9.Ne2 Bg4 10.c3) 6...0-0 7.0-0 a5 8.b5 Nbd7 9.Bb2 Qc7 10.g3; D2) 5...Nbd7 6.Be2 (6.Bb2 a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3) 6...a5 7.b5 Bd6 8.Rb1 0-0 9.bc6 bc6 10.0-0; D3) 5...a5 6.b5 Bd6 7.Be2 0-0 8.0-0 Nbd7 9.Bb2 Qc7 10.g3.

4.a3 Bf5 5.Bb2 e6 6.Be2 Bd6 7.Nh4 Bg6 8.0-0 Nbd7 9.f4 a5 10.b5 0-0 11.Ng6 fg6 12.c4 g5 (12...cb5 13.cb5 Rc8 14.Nc3=) 13.fg5+= Ne4 14.Rf8 Qf8 15.Qe1 Ng5 16.d4 Qf6 17.Nc3 Rf8 18.h4 Qg6?? (18...Nf7 19.c5 Be7 20.Bd3=+) 19.Kh1?? (better is 19.hg5 Qg5 20.Bd3+–) 19...Ne4=+ 20.Ne4 Qe4 21.c5 Bb8 22.Rd1 Qg6 23.Bd3 (23.Qa5 Qg3 24.Qc7 Bc7 25.bc6 Qh2) 23…Qg4 (24.Kg1 Bg3=+). Woelfelschneider,Peter (2080) – Bonetti,Shane (1865), TT–10 ETC, 2003.

4.a3 Bf5 5.Bb2 e6 6.Be2 Nbd7 7.d3 Bd6 8.Nbd2 0-0 9.Nh4 Bg6 10.Ng6 hg6 (10...fg6 11.c4=) 11.0-0 (11.c4 b6+=) 11...Qc7 12.g3 a5 13.ba5 Ra5 14.Nb3 Ra4 15.Qc1 Rfa8 The pressure on the isolated pawn grows 16.c4 dc4 17.dc4 Ne4 18.Bd1 R4a6 19.Bc2 Nec5 20.Nc5 Nc5 21.Rd1 Bf8 22.Qd2 Na4 23.Ba4 Ra4 24.Qc3 Qa5 Increasing the pressure on the isolated pawn on a3 25.Qd4 Qc5 Exerts pressure on the isolated pawn 26.Qd7 Qc4 27.Qb7 Qb5 28.Qb5 cb5 29.Rab1 b4 30.ab4 Rb4 31.Bd4 ½–½. Emberger,R – Kreisl,R, Graz, 2003.

4.a3 g6 5.Bb2 Qb6 6.c4 c5 (better is 6...Bg7!?=) 7.Nc3+/– dc4 8.Nd5! Qd8 (8...Nd5 9.Bh8) 9.Bc4 Nbd7 (better is 9...Be6 10.Qb3 Bd5 11.Bd5 Qd5 12.Qd5 Nd5 13.Bh8 cb4+/–) 10.Ng5 e6 11.Nf6 Nf6 12.Qf3 (12.Bb5!? Bd7 13.Qf3 Bb5 14.Bf6 Bc6+–) 12...Bg7 13.Bb5 Kf8 14.bc5 h6 15.Ne4 Ne4 16.Bg7 Kg7 17.Qe4 Qa5 18.Qb4 Qc7 19.0-0 Rd8 20.d4 e5 21.Rad1 ed4 22.ed4 Be6 23.Bc4 Bd5 24.Rd2 Qc6 25.f3 Bc4 26.Qc4 b5 27.Qc3 Rd5 28.Re1 Kf8 29.Qe3 Kg7 30.Qc3 Rad8 (30...Kf8 31.Re4 f5+–) 31.Re4 a6 32.Qe3 h5 33.g4 hg4 34.fg4 (34.Rg4 Rh8+/–) 34...Qd7 (better is 34...Rc5! 35.dc5 Rd2 36.Qd2 Qe4 37.Qc3 Kf8=) 35.Qc3+/– Qc6 36.Rf2 R5d7?? (better is 36...Qd7+–) 37.d5 (37.d5 Kg8 38.dc6 Rd1 39.Kg2+–) 1–0. Djurisic,Dusan (1990) – Pribicevic,Stefan (1785), Belgrade–ch, 2009.

4.Bb2 Nbd7 =.

4.Bb2 e6 5.a3 Bd6 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.c4 e6 5.Qb3 Be7 6.Nc3 (6.d4 0-0=) 6...0-0 (6...dc4 7.Bc4 b5 8.Be2=+) 7.d4= Nbd7 8.Bb2 Nb6 (8...Re8 9.a3=) 9.c5+= Nbd7 10.a4 Ne4 (10...b6 11.Qc2=) 11.b5 (11.Bd3 f5+=) 11...Nc3 (11...e5 12.Be2=) 12.Bc3 (12.Qc3 a6+=) 12...Bf6 (12...e5 13.Ne5 Ne5 14.de5 Bc5 15.Qc2=) 13.Be2 (13.Bd3 Qc7+=) 13...Re8 14.Bb4 (14.0-0 e5+=) 14...e5= 15.de5 Ne5 16.Ne5 Re5 (16...Be5 17.Rd1=+) 17.Rd1 Bd7 (17...a6 18.Bc3 Rg5 19.bc6 Bc3 20.Qc3 bc6 21.Kf1=+) 18.Bf3 (18.Bc3 Rg5 19.Bf6 Qf6=+) 18...Qe7 19.0-0 Re8 (19...cb5? 20.c6 ba4 21.Be7 (21.cd7 ab3 22.Be7 Re7-/+) 21...ab3 22.Bf6 (22.cd7 Re7 23.Rd5 Rd8-/+) 22...gf6 23.cd7+-) 20.Bc3 (20.Rfe1 A) 20...cb5? 21.c6 ba4 A1) 22.cd7?! Qd7 (22...ab3? 23.Be7 R5e7 24.de8R Re8 25.Rd5+-) 23.Qa3 d4+-; A2) 22.Be7 ab3 23.cd7 R5e7 24.de8R Re8 25.Rd5+-; B) 20...Be6=) 20...Rg5 (better 20...Re3!? 21.fe3 Qe3 22.Kh1 Qc3 (22...Bc3?! 23.bc6 bc6 24.Qb7=) 23.Qc3 Bc3-/+) 21.Bd4 Bd4 22.Rd4 Qf6 (better 22...Qc5!? 23.Qb2 Qd6-/+) 23.Kh1= Qh6 (23...Rge5 24.Qb4=) 24.Qb2 (24.bc6!? Bc6 25.Bd5+=) 24...Rge5= 25.bc6 (25.Qd2 Qf6+=) 25...Bc6 (25...bc6 26.Rb4 R5e7 27.Rb8=) 26.Rg4 (26.Rfd1 Qf6+=) 26...Rg5 (26...d4 27.Bc6 (27.Rd4?? Bf3 28.Qb5 Bc6-+; 27.ed4?? Re1 28.Qb1 Qd2-+) 27...Rh5 28.h4 Rh4 29.Rh4 Qh4 30.Kg1 bc6 31.Qd4 Qd4 32.ed4=) 27.Rd1 (27.Rg5 Qg5 28.Rd1 Qh4+=) 27...Rg4= 28.Bg4 d4 (better 28...Ba4!? 29.Rd5 Bc6=) 29.Rd4+/- (worse 29.ed4 Ba4 30.Ra1 Bc6=) 29...Qg5 30.Bf3 (30.Qc2 g6+/-) 30...Bf3 (30...Qc5!? 31.Rg4 Qe5 32.Qe5 Re5=) 31.gf3+/- Qc5 32.Rg4 Qf8 33.Kg2 (33.Qb7 Re7 34.Qd5 Re6+/-) 33...Rd8 (33...b6 34.Rd4=) 34.h4 (34.Qb7 Qc5+/-) 34...Re8 (34...b6 35.Rd4=) 35.h5 (35.Qb7 Re7 36.Qa6 Rc7+/-) 35...h6 (35...b6 36.Qb5=) 36.f4 (36.Qb7 Re5+/-) 36...f6 (36...f5 37.Rg6 Qf7 38.Qc3=) 37.Kg3 (37.Qb7 Re7 38.Qd5 Kh8+/-) 37...Kh8 (37...Qf7 38.Qb5=+) 38.Qc2 (better 38.Qb7!? Re7 39.Qc6+=) 38...Qf7 39.Rg6 Rf8 40.Qd2 Kh7 (40...Rc8 41.Qd1=+) 41.Qe2 (41.a5 Qc7=) 41...Rg8 (41...Rd8 42.Qc2 f5 43.a5=+) 42.Qf3 (42.Qd3 Kh8=+) 42...Rf8 43.Qg4 (43.Qe2 Rd8=+) 43...Qe7 (43...Rd8 44.e4=+) 44.f5 (44.Qf5 Kg8=) 44...Rf7 (44...Rc8 45.a5=+) 45.Qf4 (better 45.Kg2=) 45...Qe5 (better 45...Qd7=+) 46.Qe5+/- fe5 (46...fe5 47.Kg4 Rc7+/-). ClayPigeons (2120) - LeFiN (2160), Rated Bullet game, lichess.org, 2020.

4.d4 Bf5 5.Nc3 +=.

4.d4 Bf5 5.Bd3 Bd3 6.Qd3 g6 (6...e6 7.a3=) 7.0-0= Nbd7 (7...e6 8.a3=) 8.c4 dc4 9.Qc4 Bg7 (9...e6 10.Nc3=) 10.Nc3 0-0 (10...Nb6 11.Qb3=) 11.Bb2 (11.e4 Nb6 12.Qc5 h6=) 11...Nb6= 12.Qe2 Nbd5 13.Nd5 Qd5 14.Rfd1 (14.Rfc1 Ne4=) 14...Ne4 (14...a5 15.Bc3=) 15.Nd2 Nd2 (15...Rfd8 16.Nb3=) 16.Rd2 Rfd8 (17.e4 Qd6=). Behrmann,Klaus – Scherfke,Frank, compuserve, 1997.

4.d4 Bg4 5.Bd3 (5.h3 Bf3 6.Qf3 Nbd7=) 5...e6 (5...Nbd7 6.Bb2+=) 6.c3 (6.a3 a5 7.b5 cb5 8.Bb5 Nc6+=) 6...a5 7.ba5 Be7 (7...Qa5 8.Qb3 Bf3 9.gf3+=) 8.h3 (8.Qb3 Nbd7+=) 8...Bf3+= 9.Qf3 (9.gf3 c5+=) 9...Nbd7 (9...Qa5!? 10.0-0 c5+=) 10.a6= ba6 11.0-0 0-0 12.Qe2 (12.Nd2 e5 13.e4 Qa5=) 12...c5 13.Ba6 (13.Nd2 Rb8 14.Rb1 Rb1 15.Bb1 Qb6+=) 13...c4 (13...Ne4 14.Bb2+=) 14.Bb5 Ne4 15.Qc2 (15.Bb2 Ndf6=) 15...Ndf6 (15...Nd6 16.Bd7 Qd7 17.Ba3+=) 16.a4= Qa5 (16...Qc7 17.f3 Nd6 18.Na3=) 17.f3 Ng3 (17...Rfb8 18.Ba3 Nd6 19.Bb4=) 18.Re1+= Rfb8 19.Ba3 Ba3 20.Na3 ½–½. Orlok – Redmike, playchess.de, 2003.

4.Be2 e6 5.a3 a5 (5...Bd6 6.0-0=+) 6.b5 Be7 (6...cb5 7.Bb5 Bd7 8.Nc3=) 7.0-0 0-0 8.d4 Ne4 9.bc6 bc6 10.Bb2 (10.Ne5 f6 11.Nd3 Nd7=) 10...Qb6 (10...Nd7 11.Nbd2=) 11.Qc1 (11.Ra2 Ba6=). pierre – salmo, ChessHere.com, 2005.

4.Be2 Bg4 5.d4 Nbd7 6.Nbd2 e6 7.Rb1 Be7 (7...Qb6 8.a3+=) 8.c4 (8.0-0 0-0=) 8...a5 (8...dc4 9.Nc4 Bf5 10.Rb3=) 9.b5 c5 10.Bb2 (10.cd5 ed5 11.dc5 Nc5=) 10...0-0 11.0-0 Nb6 (11...Bd6 12.Qa4=) 12.h3 (12.dc5 Bc5 13.Nb3 Be7 14.cd5 a4 15.Bf6 gf6+=) 12...Bh5 (12...Bf5 13.Rc1=) 13.dc5 Bc5 14.Nb3 Nbd7 (better is 14...Bb4!? 15.cd5 Nbd5=) 15.Bf6 Qf6 16.cd5 Rfd8 17.de6 fe6 18.Nfd4 Bf7 (18...Bg6 19.Nc5 Nc5 20.Rc1+/–) 19.Nc5 Nc5 20.Qc2 Rac8 21.Rbc1 e5 22.Nf3 (22.Nc6 Ne6 23.Bd3 g6–/+) 22...Be6 23.Qb2 Exerts pressure on the isolated pawn 23...Nd7 (23...Rd5 24.Bc4 Nd3 25.Bd3 Rc1 26.Bh7 (26.Qc1?! Rd3 27.Qb2 Rd5+=; 26.Rc1?! Rd3 27.Qe5 Qe5 28.Ne5 Rd5+–) 26...Kh7 27.Rc1+–) 24.Rfd1 Kh8 (24...Rc1 25.Rc1 Bd5 26.Bc4 Bc4 27.Rc4+/–) 25.Rd6 Qe7 26.Rcd1 e4 27.Ne5 Nc5 28.Rd8 Rd8 29.Rd8 Qd8 30.Bg4 Bg8 (30...Qf6 31.Be6 Qe6 32.Qd4+/–) 31.a3 (31.Qd4 Qb6 32.a4 Bb3+/–) 31...Qd5 32.Qd4 (32.Qc3 b6+/–) 32...Qd4+– 33.ed4 Nb3 34.Nc6?? (better is 34.f3!?+/–) 34...Bc4 (34...bc6 35.bc6 Nd4+–) 35.b6 (better is 35.Ne7=) 35...Bb5?? (35...bc6 36.b7 Nd4 37.b8Q Bg8 38.Qe5+–) 36.d5?? (36.Nd8 Nd4 37.Nb7 a4+–) 36...a4?? (36...bc6 37.b7 Kg8 38.b8Q Kf7 39.dc6 Nd4 40.Qa7 Ke8 41.c7 Ne2 42.Be2 Bd7 43.Bb5 Kf8 44.Bd7 Kf7 45.c8Q a4 46.Bg4 Kg6 47.Qf5 Kh6 48.Qh5) 37.Bc8?? (37.Ne5 Nd4+–) 37...Nc5?? (37...bc6 38.b7 Nd4+–) 38.Na5 Kg8? (better is 38...Ba6+–) 39.Nb7 Bd7 (39...Nb7 40.Bb7 Bc4 41.d6+–) 40.Nc5 (40.Nc5 Bc8 41.b7 Bb7 42.Nb7+–) 1–0. Dutschak,Hauke – Mach,Holger, Hamburg–chI U18, 1989.

5.Bb2 A) 5...Nbd7 6.Be2 (6.Nc3 e6 7.Rg1 Bd6 8.h3 Bf3 9.gf3 0-0 10.h4) 6...e6 7.Nc3 Bd6 8.0-0 Bf3 9.Bf3 0-0 10.Be2; B) 5...e6 6.h3 (6.Bd3 Nbd7 7.0-0 Bd6 8.Nc3 a5 9.h3 Bf3 10.Qf3) 6...Bf3 7.gf3 Bd6 8.Rg1 0-0 9.c4 Nbd7 10.Nc3.

5.Nc3 e6= 6.Be2 (6.Bb2 Nbd7 7.Be2 Bd6 8.Nd4 Be2 9.Qe2 0-0 10.0-0) 6...Nbd7 7.0-0 Bf3 8.Bf3 Bd6 9.d4 0-0 10.g3.

5.d4 e6 (5...a5 6.b5 (6.ba5 c5 7.Bb5 Nc6 8.Bd2 cd4 9.ed4 e6 10.0-0) 6...Ne4 7.Bb2 Nd7 8.h3 Bh5 9.Nbd2 Ndf6 10.bc6; 5...Nbd7 6.Nc3 (6.h3 Bf5 7.Nc3 e6 8.Bd3 Bd6 9.0-0 0-0 10.Bb2) 6...e6 7.h3 Bf5 8.Bd3 Bd6 9.0-0 0-0 10.Bb2) 6.c4 (6.Nc3 Bd6 7.Bd3 0-0 8.h3 Bf5 9.0-0 Nbd7 10.Bd2; 6.h3 Bf5 7.Bd3 Bd6 8.0-0 Nbd7 9.Nc3 0-0 10.Bd2) 6...Bd6 (6...Nbd7 7.h3 Bf5 8.Nc3 Be7 9.Bd3 dc4 10.Bc4) 7.h3 (7.c5 Bc7 8.h3 Bf5 9.Nc3 Nbd7 10.Bd3) 7...Bh5 (7...Bf5 8.Nc3 0-0 9.c5 Bc7 10.Bd3) 8.Nbd2 (8.c5 Bc7 9.Bd3 Nbd7 10.Nc3) 8...Nbd7 9.Be2 (9.c5 Bc7 10.Be2) 9...0-0 10.0-0 (10.c5=) 10...Qe7 11.Bb2 Rfe8 12.Rc1 Red8 (12...Ne4 13.cd5 ed5 14.Ne4 de4 15.Nd2 Be2 16.Qe2=) 13.Ne5 Be2 14.Qe2 a5 15.b5 c5 16.Nd3 Rac8 17.a4 cd4 18.ed4 (worse is 18.Bd4 Ba3 19.Bf6 Nf6+=) 18...dc4 19.Nc4 (worse is 19.Rc4 Nb6 20.Rc8 Rc8+= (20...Nc8?! 21.Nc4=)) 19...Bb4 20.Nb4 Qb4 21.Ba3 Qa4 22.Be7 Qb5 23.Qf3 (23.Qa2 Nb6=) 23...Rc4 (23...Qa6 24.Nd6 Rc1 25.Rc1 Rb8+=) 24.Bd8+= Nd5 25.Qd3 Rb4 26.Rc8 g6 (26...f5 27.Qb5 Rb5 28.Ra1+=) 27.Bf6+/– Nf8 28.Bg5 Nb6 (28...Qd3 29.Bh6 Qf1 30.Kh2 Qh1 31.Kh1 Rb1 32.Kh2 Rh1 33.Kh1 a4 34.Rf8) 29.Qb5 Rb5 30.Rc5 Rc5 (30...Rb4 31.Ra5 Nfd7 32.Ra7+/–) 31.dc5 Na4 32.Rc1 Nd7 33.c6 bc6 34.Rc6 Kg7 35.Be3 Kf6 36.Ra6 Ke7 37.Ra5 Nc3 38.Bh6 Nd5 39.Ra8 f5 40.Bg5 Kd6 41.Ra6 Ke5 (41...N5b6 42.Kf1+/–) 42.g3+– Nb4 43.Ra8 Nd5 44.Rh8 N7f6 45.Rf8 Ne4 46.Bh6 Nc5 (46...Kd6 47.Rf7+–) 47.Rf7 Nd3 48.Rh7 f4 49.Rg7 Kf6 50.Rg8 e5 51.Ra8 Kf5 (51...fg3 52.fg3 Nc7 53.Rf8 Ke6 54.Rc8+–) 52.Ra6 Nc3 (52...fg3 53.fg3 g5 54.g4 Kf4 55.Rd6+–) 53.Ra3 Ne2 54.Kf1 Nec1 55.g4 Ke4 56.Bg7 Nb2 (56...Nc5 57.h4 N1b3 58.h5 gh5 59.gh5+–) 57.h4 Nbd3 (57...Ncd3+–) 58.h5 gh5 59.gh5 Kf5 60.h6 Kg6 61.Bf8 e4 62.Ra6 Kh7 63.Ra7 Kg8 64.Be7 e3 65.Bg5 e2 66.Kg2 e1Q 67.h7 1–0. Vegjeleki,Adolf (2195) – Baeckstroem,Mikael (2225), corr ICCF WSTT/3/06/Final, 2009.

5.Be2 Nbd7 6.Nc3 (6.0-0 e6 7.Nc3 Bf3 8.Bf3 Bd6 9.d4 0-0 10.g3) 6...e6 7.0-0 Bf3 8.Bf3 Bd6 9.d4 0-0 10.g3.

5.Be2 e6 6.Nc3 (6.h3 Bf3 7.gf3 Nbd7 8.Nc3 Bd6 9.Rg1 0-0 10.Bb2) 6...Nbd7 7.0-0 Bf3 8.Bf3 Bd6 9.d4 0-0 10.g3.

5.Be2 Bf3 6.gf3 Qd6 7.Nc3 Nbd7 8.Bb2 g6 9.h4 Bg7 10.f4.

5.Be2 Bf3 6.Bf3 Nbd7 7.Nc3 e6 8.Bb2 Bd6 9.0-0 0-0 10.Be2.

5.Be2 Bf3 6.Bf3 e5 7.Bb2 Bd6 8.0-0 0-0 9.Nc3 (9.d3 Qc7=) 9...Qc7=+ 10.h3 Nbd7 11.Be2 (11.b5 Rfd8=+) 11...Ne8 (11...b5 12.d3=+) 12.Qe1 (12.Bd3 b5=) 12...f5 13.f3 Nef6 Black plans e4 14.Nd1 (14.Qh4 Rae8=+) 14...e4 (14...a5 15.Qh4–/+) 15.f4 (15.Nc3 Bh2 16.Kh1 Bg3=+) 15...b6 (15...a5 16.ba5 Ra5 17.Qg3=+) 16.c3 (16.Qg3 a5 17.b5 Nc5=) 16...c5 17.c4 (17.Qg3!?=+) 17...cb4–/+ 18.ab4 dc4 (better 18...Bb4 19.cd5 Nd5–/+) 19.Bc4?? (better 19.b5=+) 19...Qc4–+ 20.Rc1 Qb4 21.Bc3 Qb5 22.Nf2 Nc5 23.h4 (23.Rb1 Qd7–+) 23...Nd3 (better 23...a5 24.Rb1 Qc6 25.Qe2–+) 24.Qd1 (24.Rb1 Qd5 (worse 24...Ne1 25.Rb5 Nd3 26.Nd3 ed3 27.Rf5–+) 25.Nd3 Qd3–+) 24...Nc1 25.Qc1 Rac8 (25...Nd5 26.Bd4–+) 26.Nh3 (26.Qa1 Rc7–+) 26...h6 (26...Nd5!? 27.Nf2–+) 27.Qa1 Kh7 (27...Qd7 28.Qb2–+) 28.Rb1 (28.Qa7 Ra8 29.Qb7 Ra2–+) 28...Qd3 (better 28...Qd7–+) 29.Qa7 (29.Nf2 Qd5–+) 29...Bc5 (29...Qb1 30.Kf2 Ng4 31.Ke2 Rc3 32.Qa2 Qd3 33.Ke1 Rc1) 30.Rf1 (30.Re1 b5 31.Qa1 Ng4–+) 30…Ra8 (30...Ra8 31.Qb7 Be3 32.de3 Qe3 33.Nf2 Qc3 34.Qb6 Nd5–+) 0–1. Akrapovik (1605) – odontonama (1605), lichess.org, 2020.

4.a3 Nd7 5.h3 Bh5 6.Bb2 Ngf6 7.d3 e6 8.Nc3 h6 9.Be2 Bd6 10.e4 Bc7 11.ed5 ed5 12.Nh4 Bg6 13.Ng6 fg6 14.Nb1 0-0 15.Nd2 Ne5 16.Be5 Be5 17.Rb1 Qe7 18.0-0 Bc7 19.Re1 Qd6 20.Nf1 Rf7 21.Bf3 Rff8 22.Rb3 Nh7 23.d4 Ng5 24.Rbe3 Qf6 25.b5 Bf4 26.R3e2? (better is 26.Rb3+=) 26...Ne6?? (better is 26...Nf3 27.gf3 cb5–+) 27.bc6 (27.Re6 Qf7+–) 27...bc6?? (27...Nd4 28.Bd5 Kh7 29.cb7 Ne2 30.Re2 Rad8+/–) 28.c3 (28.Re6 Qf7+–) 28...Kh7?? (28...Ng5 29.Bg4=) 29.Rb2 (better is 29.Re6 Qg5 30.Rc6+–) 29...Bd6 30.Qc2 Nf4 31.Nd2 Qg5 32.c4? (better is 32.Kf1+=) 32...Nh3–+ 33.Kf1 Nf4?? (33...Nf2 34.cd5 Rae8 35.Re8 Re8 A) 36.dc6 Qe3 37.Ne4 Ne4 38.Qe4 Qc1 (38...Qe4?! 39.Be4 Re4 40.Rc2–+) 39.Ke2 Qb2 40.Kd3 Qb3 41.Ke2 Qc2 42.Ke1 Bg3 43.Kf1 Qf2; B) 36.Qc6 Re1 37.Ke1 Qe3 38.Be2 Nd3 39.Kd1 Nb2 40.Kc2–+) 34.cd5? (better is 34.c5!? Bc7 35.Rb7–/+) 34...cd5–/+ (worse is 34...Ba3 35.Rb3 Bd6 36.dc6+=) 35.Rb7 Ba3 1–0. Ivanets,Vladimir (2185) – Burdiyan,Anatoliy, Khanty–Mansiysk RUS, 2011.

4.Bb2 e6 5.h3 Bh5 6.a3 =.

4.Bb2 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4).

4.c4 e5+= 5.Qb3 Bf3 6.gf3 d4 (6...Qd6 7.Bb2+=) 7.Bb2= Na6 (7...Qe7 8.a3=) 8.c5 Nc7 9.Na3 Qf6 (9...b6 10.Nc4 bc5 11.Ne5+=) 10.f4+= ef4 11.Bd4 Qf5 12.b5 (12.Bd3 Qd7+=) 12...Qd5 (12...Ne6 13.bc6 b6 14.Bd3+/–) 13.bc6 (13.Qd5 cd5 14.c6+= (worse is 14.ef4 Ne6 15.Bb2 Bc5+=)) 13...Qb3 (13...Qh1 14.Qb7 fe3 15.de3 A) 15...Qh2 16.Nb5 Rd8 17.Nc7 (17.Qc7 Qc7 18.Nc7 Ke7+=) 17...Qc7 18.Qc7+–; B) 15...Rd8 16.Qc7 Ne7+–) 14.ab3+– bc6 15.Bg2 (15.ef4?! Ne6 16.Bc3 Bc5=) 15...0-0-0 (15...Ne7 16.Nc4 f6 17.Nd6 Kd7 18.Bh3 Ne6 19.Ra6+/–) 16.Nc4 Kb8? (better is 16...Nb5+–) 17.Ne5 (17.Bc6?! f6 18.b4 Ne7+–) 17...Nh6 (17...Ne7 18.Nf7 Rd4 19.ed4 Rg8+–) 18.Nc6 Kc8 19.Nd8 Kd8 20.Ra7 fe3 21.fe3 Nf5 (21...f6 22.0-0+–) 22.0-0 Nd4 23.ed4 f6 24.Bc6 Be7 (24...h5 25.b4 Rh6+–) 25.Re1 Rf8 26.Rb7 (26.Rb7 Na6 27.Ra1 g6 28.Ra6 Bd6 29.Ra8 Bb8 30.Rab8#) 1–0. Woelfelschneider,Peter – Dumont, 2009.

4.d4 Nd7+= 5.Be2 (5.c4 e5 6.a3 e4+=) 5...Bf3 (5...e5 6.Ne5 Be2 7.Qe2 Ne5 8.de5 Bb4 9.c3+=) 6.Bf3= e5 7.a3 e4 8.Be2 a6 (8...Ngf6 9.Nd2=) 9.Nd2 (9.c4 dc4 10.Qc2 Ngf6=) 9...g6 (9...b5!?=) 10.c4+= Bg7 11.0-0 Ne7 12.Qb3 0-0 13.Bb2 h5 (13...Re8 14.Qc2+=) 14.Rac1 (14.f3 ef3 15.Bf3 Nf6+=) 14...Kh7 (14...Re8 15.Qc2+=) 15.cd5 (15.f3 ef3 16.Rf3 f5+/–) 15...cd5 16.Rc2 (16.f3 f5+/–) 16...b5 17.Rfc1 (17.f3 Nf6+/–) 17...Nb6+= 18.Ba1 (18.f3 Bh6+=) 18...Nc4= 19.Nc4 (19.a4 Rc8 20.Nb1 Qd7=) 19...dc4 20.Qc3 (20.Qb1 Nd5=) 20...Nd5+= 21.Qe1 Rc8 22.Bc3 Qg5 (22...f5 23.Rd1+=) 23.Bf1 (23.Rd1 f5+=) 23...f5 24.g3 (24.Rd1 h4+=) 24...h4–/+ 25.Bg2 Rh8 (25...hg3 26.hg3 Rh8 27.f4 ef3 28.Bf3 Ne3 29.Rh2 Kg8 30.Bd5 Kf8 31.Rh8 Bh8 32.Bb7–+) 26.Re2 (26.gh4 Qh4 27.f3 Qg5–/+) 26...Rce8 (26...hg3 27.fg3 Bh6 28.Kh1–/+) 27.Rcc2 (27.a4 hg3 28.hg3 Kg8–/+) 27...Kg8 28.Qa1 (28.Rc1 hg3 29.fg3 Bh6–/+) 28...hg3 (28...Qh6 29.Red2–/+) 29.hg3 Qh5 30.Qa2 Qh2 (30...Rd8 31.Kf1–/+) 31.Kf1–+ g5 (better is 31...Rc8!?–+) 32.a4+= f4 (32...Re6 33.Red2 f4 34.gf4 gf4 35.Re2 Qg2 36.Ke1 Rh1 37.Kd2–+) 33.ef4= gf4 (33...Nc3 34.Rc3 gf4 35.ab5 ab5 36.Re4 Re4 37.Qa8 Kf7 38.Qe4+–) 34.Re4 (34.ab5 f3 35.Bf3 ef3 36.Re8 Kh7 37.Ke1 Re8 38.Kd2 Bh6 39.Kd1 Qg1 40.Be1 Re1) 34...Re4+= 35.Be4 Nc3 (better is 35...Qh5 36.Ke1 f3 (36...Nc3?! 37.Rc3 Bd4 38.Rc4 Bf2 39.Qf2 bc4 40.Qf4=) 37.Bd5 Qd5–+) 36.Rc3= Bd4? (36...Qh3 37.Bg2 Qd7=) 37.Rf3?? (better is 37.ab5 ab5 38.Rc4 bc4 39.Qc4 Kf8 40.Qd4 fg3 41.Qd8 Kf7 42.Bd5 Kg6 43.Qd6 Kf5 44.Qe6 Kg5 45.Qe3 Kf6 46.Qd4 (46.Qg3?! Qg3 47.fg3 Rb8=) 46...Ke7 47.Qe5 Kd8 48.Qd6 Ke8 49.Bc6 Kf7 50.Qg3+– (50.fg3?! Qb2+/–)) 37...Qh1–/+ 38.Ke2 Kg7 (38...Bc3! 39.Rf4 Qe1 40.Kf3 Bb4 41.ab5 Qh1 (41...ab5?? 42.Qa8 Kg7 43.Qa7 Be7 44.Qe7 Kg8 45.Rf8) 42.Ke2 Qe1 43.Kf3 Qh1 (43...ab5 44.Qa8 Kg7 45.Qa7 Be7 46.Qe7 Kg8 47.Rf8) 44.Ke2 Qe1 45.Kf3=) 39.Rf4 (39.Qd2!? Qa1 40.Rf4+/–) 39...Re8 40.Qc2 Re7 (40...ba4 41.Rh4 Qg2 42.Rg4 Kf8 43.Rf4 Kg7 44.Kd2–/+) 41.Rh4 (41.ab5 ab5 42.Rg4 Kf8=) 41...Qg2= 42.Rg4 Kh8 43.Rh4 Kg8 44.Rg4 Bg7 (44...Kh8!? 45.Rh4 Kg7 46.Rg4 Kh8=) 45.ab5 ab5 46.Ke3 Kf8? (46...Qh1 47.Qd2 Qh6 48.Ke2+=) 47.Ke2 (better is 47.Rf4 Ke8 48.Qd1+–) 47...Ke8 48.Ke3 (better is 48.Rf4=) 48...Kf8?? (48...Qh1 49.Rh4 Qe1 50.Kf3 Qb4 51.Bc6 Kd8 52.Qf5 Qc3 53.Kg2=) 49.Ke2?? (better is 49.Rf4 Ke8 50.Qd1+–) 49...Bd4 50.Rf4 Ke8?? (better is 50...Kg7 51.Kd2 Qf1 52.Rg4 Kf8 53.Rf4 Rf7=) 51.Kd2+– c3 (51...Qf1 52.Bg6 Kd8 53.Rd4 Kc7 54.Kc3 Qa1 55.Qb2 Qe1 56.Rd2+=) 52.Kd3 Qf1 53.Kd4 Qc4 54.Ke3 Qb4 55.Kf3 Qc5 56.Qa2 Qd6 (56...Kd7+–) 57.Qa8 Kd7 58.Qb7 Ke6 59.Qb5 Qd1 60.Kg2 c2 61.Qc6 Ke5 62.Qf6 1–0. Krull,Guenter – Thielemann,Joachim, Schleswig Holstein–ch cand, 1991.

4.Be2 e6 5.a3 Nf6 (5...Bd6 6.Bb2 (6.Nc3 Nf6 7.Bb2 0-0 8.0-0 Bf3 9.Bf3 b5+=) 6...Nf6 7.Nc3 0-0 8.0-0 Bf3 9.Bf3 b5+=; 5...a5 A) 6.b5 Bf3 (6...Nf6 7.Nc3 Bd6 8.Bb2 0-0 9.0-0 Nbd7=; 6...Bd6 7.Nc3 Nf6 8.Bb2 0-0 9.0-0 Nbd7=) 7.gf3 Bd6 8.Bb2 Nf6 9.Nc3 0-0+=; B) 6.Bb2 Nf6 7.b5 Bf3 8.gf3 Bd6 9.Nc3 0-0+=) 6.h3 (6.Nc3 b5 (6...Bd6 7.Bb2 0-0 8.0-0 Bf3 9.Bf3 b5+=; 6...Qc7 7.Bb2 Bd6 8.h3 Bf3 9.Bf3 0-0+=) 7.Bb2 a5 8.ba5 Ra5 9.0-0 Bd6+=; 6.Bb2 Bd6 (6...a5 7.b5 Bf3 8.gf3 Bd6 9.Rg1 0-0+=) 7.Nc3 0-0 8.0-0 Bf3 9.Bf3 b5+=; 6.0-0 a5 (6...Bd6; 6...b5) 7.ba5 Ra5 8.d4 Bd6 9.Bd3 e5+=; 6.d3 a5 (6...Bd6; 6...Bf3) 7.ba5 Qa5 8.Bd2 Qc7 9.c4 dc4+=) 6...Bf3 7.Bf3 (7.gf3 b5 8.a4 ba4 9.c3 Bd6+=) 7...a5 8.Bb2 (8.ba5 Bd6+= 9.d3 Qa5+=) 8...ab4–/+ 9.ab4 (9.d3 b5–/+) 9...Ra1 (9...Bb4?? 10.Ra8 0-0 11.0-0+–) 10.Ba1 Bb4 11.c3 Bd6 12.0-0 Qa5 13.Bb2 Nbd7 14.d4 0-0 15.Qb3 Qb6 16.Qb6 Nb6 17.Ba3 Nc4 18.Bd6 Nd6 19.Nd2 Ra8 20.Bd1 (20.Rb1 Ra3–+) 20...Ra2 (20...Nfe4 21.Nb1–+) 21.Nb3 (21.Nb1 b6–+) 21...Nfe4 22.Re1 (22.Bf3 Nc3 23.Rc1 Ncb5–+) 22...Nf2 23.Re2 (23.Bf3 Nfe4 24.Be4 Ne4–+) 23...Re2 (23...Nd1?! 24.Ra2 g5 25.Nc5–/+) 24.Be2 Nfe4 25.c4 (25.Bd3 b6–+) 25...Nc4 26.Bc4 dc4 (26...dc4 27.Na5 c3–+) 0–1. FelixFri – marekt, ChessWorld.net, 2008.

4.Be2 e6 5.Bb2 Nf6 6.a3 a5 7.b5 Bf3 8.gf3 Bd6 9.Nc3 0-0 +=.

4.Be2 Nf6 5.0-0 e6 6.a3 Bf3 7.Bf3 Nbd7 8.Bb2 Bd6 9.d4 (9.Be2 Qc7 10.f4 0-0=) 9...0-0 10.Nd2 e5 (10...Qc7 11.g3=+) 11.de5 Be5 12.Be2?? (better 12.Be5 Ne5 13.Be2=) 12…Bb2-+ 0-1. cipiripi (2345) - Cofi7 (2350), Rated Blitz game, lichess.org, 2015.

4.h3 Bf3 5.Qf3 e5 6.Bb2 Nd7 7.b5 (7.a3 Qf6=) 7...e4 8.Qg3 Ngf6 9.bc6 (9.Nc3 Rb8=) 9...bc6=+ 10.Nc3 g6 (10...Qb8 11.Qb8 Rb8 12.Rb1=) 11.Be2 (11.Rb1 Qb8=) 11...Bg7 (11...Qb8 12.Qb8 Rb8 13.Rb1=) 12.Qd6 (12.Rb1 Qb8=) 12...Rc8 13.Rb1 Qe7 14.Qe7 Ke7 15.Ba3 Ke6 16.Rb7 Ra8 17.0-0 Rhb8 18.Rfb1 Ne8 19.Bg4 (19.Rb8 A) 19...Nb8 20.Rb7 Bc3 21.Re7 (21.dc3?! Nd7=) 21...Kf6 22.Re8+–; B) 19...Rb8 20.Rb8 Nb8=) 19...f5=+ 20.Be2 Bc3 21.dc3 Nd6 22.Bd6 Kd6 23.c4 Rb7 24.Rb7 Nf6 (24...Rb8 25.Rb8 Nb8 26.Kf1=+) 25.Kh2 a5 26.Kg3 c5 (26...dc4 27.Rf7 Nd5 28.Bc4=) 27.cd5+= Kd5 (27...Nd5 28.Rh7 Rb8 29.Rh6+=) 28.Kf4 (better is 28.Bb5+=) 28...h6?? (better is 28...Kc6 29.Rf7 Nd5 30.Kg3 Nb4=) 29.Rb6+– Nh5 30.Bh5 gh5 31.Rh6 (31.Kf5?! Rf8 32.Rf6 Rb8 33.c4 Kc4 34.Ke4 Rb2+–) 1–0. Ziolkowski,T (1800) – Szytko,J, corr, 1996.

5.c4 e5 6.cd5 cd5 7.h3 Bf3 8.Qf3 Ngf6 (8...e4 9.Qe2=) 9.Nc3 e4 10.Qf5 g6 11.Qf4 (11.Qg5 h6 (< 11...Bb4 12.Nd5 Nd5 13.Qd5+–) 12.Qf4 Be7= (12...Bb4? 13.Nd5 Nd5 14.Qe4 Qe7 15.Qd5+–)) 11...Nh5 (11...Be7 12.a3=) 12.Qh2+= Bg7 13.Qd6 Qb6 14.Qd5 (better is 14.Qb6 Nb6 15.g4+=) 14...Nhf6 (better is 14...Qb4!? 15.Rb1 Nhf6+=) 15.Qb5+/– 0-0 (15...Qb5 16.Nb5 Ke7 17.d3+/–) 16.Rd1 (16.d4 Qd6+/–) 16...a6 (16...Rac8 17.d3+/–) 17.Qb6+– Nb6 18.d3 ed3 19.Bd3 Rac8 20.Ne2 (20.Ke2 Nbd5 21.Nd5 Nd5+/–) 20...Nfd5 (20...Rfd8 21.e4+/–) 21.Bg7 Kg7 22.a3 Nc3 (22...Rfd8 23.g4+/–) 23.Rc1 Rfd8 24.Ba6 (< 24.Rc3 Rc3 25.Nc3 Rd3+=; < 24.Nc3 Rd3 25.Ne2 Ra3=+) 24...ba6 25.Rc3 (25.Nc3?! Rd3 26.Ne2 Rc1 27.Nc1 Ra3=) 25...Rc3 26.Nc3 Rd3 (26...Rc8 27.Kd2+/–) 27.Nb1+– Nc4 28.Ke2 Rb3 29.Rd1 Na3 30.Na3 Ra3 31.Rd3 Ra2 32.Rd2 Ra4 33.Rb2 (33.Rd4 Ra2 34.Kf3 Kf6+/–) 33...Kf6 34.Kd3 Ke6 35.Kc4 (35.g4 h6+/–) 35...Ra1 36.Kb3 (36.Rd2 Rc1 37.Kd4 h6+/–) 36...Rd1 (36...f5 37.Ra2 Rb1 38.Kc3 Rc1 39.Kd4+/–) 37.Rc2 Rd6 38.Ka4 (38.Rc8 h6+/–) 38...h6 (38...h5 39.Ka5+/–) 39.Ka5 Kd7 (39...h5 40.Rc4+/–) 40.e4 (40.Rc4 Ke6+/–) 40...f6 41.Rc5 Re6 42.f3 h5 43.Rc4 (43.Rd5 Kc7+/–) 43...Kd8 (43...Rd6 44.f4+/–) 44.g3 Rd6 (44...Kd7 45.f4+/–) 45.Rc5 Re6 46.h4 Kd7 47.Rd5 Kc7 (47...Ke7 48.Rd4+/–) 48.Rd2 Rc6 49.Rd3 Re6 ½–½. pierre – Lork, ChessHere.com, 2006.

5.c4 e6 6.a3 Ngf6 7.h3 Bh5 8.d4 Bd6 (8...Be7 9.Nbd2=) 9.Nbd2 (9.c5 Bb8=) 9...0-0 10.Rc1 Qe7 (10...a5 11.c5 Be7 12.b5=) 11.Be2 Rac8 (11...Bf3 12.Nf3 dc4 13.Ne5=+) 12.0-0 Bb8 13.Qc2 (13.Bd3 e5 14.de5 Ne5 15.Be5 Be5 16.cd5 cd5+=) 13...Rfd8 (13...Bg6 14.Qc3=) 14.Bd3 dc4 15.Qc4 e5 16.Bf5 Bg6 (16...Bf3 17.Nf3 (< 17.gf3 Qd6=+) 17...e4 18.Ne5+=) 17.Bg6 hg6 18.de5 Ne5 19.Be5 Be5 20.Ne5 Qe5 21.Nf3 Qd5 22.Qc2 Qd3 23.Qa4 a6 24.Rfd1 Qe4 25.Qa5 Rd5 ½–½. Wilde,Gert – Scho,Christian (2030), M–1620 E BdF, 1997.

5.c4 e6 6.h3 Bf5 =.

5.c4 e6 6.h3 Bh5 7.a3 h6 8.Nc3 Ngf6 9.cd5 ed5 10.Be2 a6 11.Qc2 Bg6 12.Bd3 Bd3 13.Qd3 g6 14.Ne2 Bg7= 15.h4 0-0 16.Bd4 a5=+ 17.ba5 Qa5 18.0-0 c5 19.Bc3 Qa6 20.Nf4 Qd3 21.Nd3 Ra4 22.Rfb1 b6 23.Nf4 Rfa8 24.g3 R8a6 25.Rb3 Bf8 26.Ne5=+ d4 Black gets strong initiative 27.Nd7 Nd7 28.ed4 cd4 Increasing the pressure on the isolated pawn on a3 29.Bb2 Nc5 30.Rb5 Ne4 31.d3 Nc3 32.Rb3 b5 33.Bc3 dc3 34.Rc3 b4 35.Rcc1 Bg7 36.Ra2 b3 37.Re2 b2 38.Rb1 Ra3 39.Rbb2 Bb2 40.Rb2 g5 41.hg5 hg5 42.Nh3 f6 43.Rb8 Kg7 44.Rd8–/+ Re6 45.Rd4 Re1–+ 46.Kg2 Rd1 47.g4 Kf7 48.Ng1 Rad3 49.Rd3 Rd3 50.Ne2 Ke6 51.Ng3 Ke5 52.Nh5 Ra3 53.Kh2 Rf3 54.Kg2 Ke4 55.Kf1 Ra3 56.Kg2 Ra6 57.Kg3 Rb6 58.Kg2 Ke5 59.Kg3 Rb7 60.Kg2 Rh7 61.Ng3 Rh6 62.Kf3 Rh4 63.Nf5 Rh1 64.Ng3 Rb1 65.Nh5 Rb6?? 66.Kg3 Ke4?? 67.Kg2 Ke5?? 68.Kg3 Rc6 69.Kf3 Rc8 70.Kg3 Rh8 71.Ng7 Ke4 (72.Nf5 Ra8 73.Nd6 Kd5–+) 0–1. Domingo Garcia,Jordi – Granados Gomez,Manuel, III Sants Hostafranc, 2001.

5.Be2 Bf3 6.Bf3 e5 =.

5.h3 Bf3 6.Qf3 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.h3 Bf3 6.Qf3 Nbd7).

3.a4 Na6 4.Ba3 =.

3.a4 Qc7 4.Bb2 (4.Nf3 Nf6=) 4...e5 5.c4 (5.Nf3 Nf6=) 5...Nd7 (5...Na6 6.Ba3=) 6.Nf3 g6 (6...Ngf6 7.Nc3=) 7.b5 (7.Nc3!?+=) 7...Bg7 8.Be2 Ne7 9.0-0 0-0 10.Nc3 c5 (10...Nc5 11.bc6 bc6 12.d3=) 11.Qc2 b6 12.Rfd1 (12.Ra2 Nf6+=) 12...Bb7 13.d4 (13.e4=) 13...f5 (better is 13...cd4!? 14.ed4 Rfe8+=) 14.de5 (14.Ng5 cd4 15.Ne6 Qc8 16.ed4 Rf6 17.Ng7 Kg7+/–) 14...de5 (14...Ne5 15.Ng5 Qd7 16.a5 ba5 17.Na4+/–) 15.Rd2 (15.Ng5 Rf6 16.Nd5 Nd5 17.cd5 Qd6+–) 15...Nf6 (15...Bf3 16.Bf3 e4 17.Be2+=) 16.Rad1 h6 (16...Bf3 17.Bf3 e4 18.Be2+=) 17.Nd5+/– Nfd5 18.cd5 Qd6 19.Bc4 g5 (19...Bf6 20.e4+/–) 20.e4 (better is 20.Be5 Be5 21.Ne5 Qe5 22.d6 Kg7 23.de7+–) 20...fe4= 21.Qe4 Increasing the pressure on the isolated pawn on e5 21...Rf5 (21...Rf4 22.Qc2 Nf5 23.Re1 Rc4 24.Qc4= (worse is 24.Qf5 Re8+=)) 22.Re1 (22.Re2 Rf4 23.Qc2 Rf3 24.gf3 Ng6+/–) 22...Rf4 23.Be5?? (better is 23.Qc2 Ng6 24.Bd3+=) 23...Re4–/+ 24.Bd6 Re1?? (better is 24...Rc4 25.Be7 Bc3–/+) 25.Ne1+/– Nf5 (25...Ng6 26.Re2 Bc8 27.h3+/–) 26.Bc7+– Nd4 (26...Kf8 27.d6 Bf6 28.a5+–) 27.Nc2 Kf8 (27...Bf6 28.d6 Kg7 29.d7 Nc2 30.Rc2+–) 28.Nd4 (28.d6!? Bf6 29.Nd4 cd4+–) 28...cd4 29.Re2 (better is 29.d6 Bf6 30.f3+–) 29...d3+/– 30.Rd2 Re8 31.h3 Re1 32.Kh2 Rc1 33.Bd6 Ke8? (better is 33...Kg8 34.Bd3 Bd5+/–) 34.Ba2?? (better is 34.Bd3 Re1 35.Bg6 Kd8 36.Bg3+–) 34...Rc2–/+ 35.Bb4? (better is 35.Rc2 dc2 36.Ba3–/+) 35...Be5–+ 36.g3 Bd6! 37.Rc2 (37.Bd6 Rd2 Deflection) 37...dc2 38.Bd2 Ba3 39.Kg2 (39.h4 c1B 40.Bc1 Bc1 41.hg5 hg5–+) 39...c1Q 40.Bc1 Bc1 41.Kf3 Kd7 42.Ke4 Ba3 (42...Bc8 43.Bb3–+) 43.Ke5 (43.Kf5 Bc5 44.f4 gf4 45.Kf4 Bd6 46.Kf3 Be5–+) 43...h5 (43...Ke7 44.g4–+) 44.Bb3 Bd6 45.Kf5 Be7 46.Ke5 Bc5 47.f4 (47.Kf5 Bf2 48.Kg5 Bg3 49.Kh5 Kd6–+) 47...Bd6 48.Ke4 gf4 49.gf4 h4 (49...Bc7 50.Kf5–+) 50.Bd1 Be7 51.Ke5 Bd6 52.Kf5?? (52.Ke4 Bf8 53.Ke5–+) 52...Bd5–+ 53.Kg6 (53.Kg4 Be7 54.Kh5–+) 53...Bf4 54.Kf5 Bg3 0–1. Nikolic,Jovane (1710) – Karman,Jarbas, Championship da Primeira Categoria do E, 2013.

3.Bb2 (--> 1.b4 c6 2.Bb2 d6 3.e3).

3.d4 Na6 A) 4.Ba3 A1) 4...Nf6 5.Nf3 (5.Nc3 Nc7 6.Nf3 a5 7.b5 cb5 8.Nb5 Bd7 9.c4 Nb5 10.cb5) 5...Bf5 6.Nc3 e6 7.Ba6 ba6 8.0-0 d5 9.Qe2 a5 10.Rfb1; A2) 4...Nc7 5.Nc3 (5.Nf3 a5 6.c4 ab4 7.Bb4 c5 8.Bd2 cd4 9.ed4 Bg4 10.Nc3; 5.Bd3 a5 6.Nc3 ab4 7.Bb4 Nf6 8.Nf3 Ncd5 9.Nd5 Nd5 10.Bd2; 5.c4 Nf6 6.Nf3 a5 7.Bd3 ab4 8.Bb4 b5 9.cb5 Nb5 10.Nc3) 5...a5 6.b5 cb5 7.Nb5 Nf6 8.Nf3 Bd7 9.c4 Nb5 10.cb5; A3) 4...Qb6 5.Nd2 (5.Qd2 Nc7 6.c4 Qa6 7.Nf3 Nf6 8.Bd3 Be6 9.Qc3 g6 10.Nbd2) 5...Nf6 6.Ngf3 Bd7 7.c3 g6 8.Bd3 Bg7 9.0-0 0-0 10.h3; B) 4.Bd2 B1) 4...Nf6 5.Nf3 (5.a3 e5 6.Nc3 e4 7.Nge2 d5 8.Nf4 Bd6 9.Be2 0-0 10.0-0) 5...g6 6.b5 Nc7 7.bc6 bc6 8.Nc3 Rb8 9.Rb1 Be6 10.Rb8; B2) 4...g6 5.b5 (5.Nf3 Nf6 6.b5 Nc7 7.bc6 bc6 8.Nc3 Rb8 9.Rb1 Be6 10.Rb8; 5.Bd3 Nf6 6.Nf3 Qb6 7.a3 Bf5 8.Nc3 Bd3 9.cd3 Bg7 10.0-0; 5.a3 Bg7 6.Nf3 Nf6 7.Bd3 0-0 8.0-0 Be6 9.c4 d5 10.cd5) 5...Nc7 6.bc6 bc6 7.Nc3 Nf6 8.Rb1 Be6 9.Bd3 Rb8 10.Nh3; B3) 4...d5 5.Nf3 (5.a3 g6 6.Nf3 Nf6 7.Nc3 Bg7 8.Bd3 0-0 9.0-0 Nc7 10.Ne5; 5.Bd3 Nf6 6.Nf3 g6 7.0-0 Bg7 8.a3 0-0 9.Nc3 Nc7 10.Ne5; 5.b5 cb5 6.Bb5 Bd7 7.Bd7 Qd7 8.Nf3 Nf6 9.Ne5 Qf5 10.0-0) 5...Nf6 6.b5 cb5 7.Bb5 Bd7 8.Bd7 Qd7 9.0-0 e6 10.Ne5; B4) 4...Bd7 5.Na3 (5.a3 Nf6 6.Nf3 g6 7.Bd3 Bg7 8.0-0 0-0 9.Qe2 Nc7 10.c4; 5.Nf3 Nf6 6.Bd3 g5 7.h3 Rg8 8.Na3 g4 9.hg4 Rg4 10.0-0; 5.Ba6 ba6 6.Nf3 Nf6 7.0-0 Rb8 8.Qe2 Qb6 9.c4 g6 10.Nc3 ; 5.Nc3 Nb4 6.Rb1 Nd5 7.Rb7 Ngf6 8.Nf3 Rb8 9.Rb8 Qb8 10.Nd5) 5...Nf6 6.Nf3 g6 7.Bd3 Bg7 8.0-0 0-0 9.Qe2 Nc7 10.Nc4; B5) 4...Be6 5.Nf3 (5.Bd3 Nf6 6.Nf3 g6 7.0-0 Bg7 8.a3 0-0 9.c4 d5 10.cd5; 5.a3 Nf6 6.Nc3 g6 7.Nf3 Nc7 8.Bd3 Bg7 9.0-0 0-0 10.Qe2; 5.Nc3 Nf6 6.a3 g6 7.Nf3 Nc7 8.Ng5 Bh6 9.h4 Bd7 10.Bd3; 5.b5 Nc7 6.bc6 bc6 7.Nc3 Nf6 8.Bd3 Rb8 9.Nf3 g6 10.0-0; 5.Na3 Nf6 6.Nf3 g6 7.Ng5 Bf5 8.Bd3 h6 9.Nf3 Bg7 10.0-0; 5.Be2 Nf6 6.Nf3 g6 7.0-0 Bg7 8.Ng5 Bd7 9.a3 Nc7 10.c4) 5...Nf6 6.b5 Nc7 7.Nc3 cb5 8.Nb5 a6 9.Nc7 Qc7 10.Bd3; B6) 4...Bf5 5.Nf3 (5.a3 g6 6.Nc3 Nf6 7.Nf3 Bg7 8.Bd3 Bd3 9.cd3 0-0 10.0-0; 5.Nc3 Nf6 6.Rb1 g6 7.Bd3 Bd3 8.cd3 Nc7 9.Nf3 Bg7 10.0-0) 5...Nf6 6.a3 Nc7 7.Bd3 g6 8.0-0 Qd7 9.Nc3 Bd3 10.cd3; C) 4.a3 C1) 4...Nc7 5.Bd3 (5.Nf3 Nf6 6.Bd3 g6 7.0-0 Bg7 8.Bb2 0-0 9.c4 Ne6 10.Nc3; 5.Bd2 Nf6 6.Nf3 a5 7.ba5 Ne6 8.Bd3 g5 9.0-0 Bg7 10.Nc3) 5...g6 6.Bd2 Nf6 7.Nf3 Bg7 8.0-0 0-0 9.Qe2 Ne6 10.c4; C2) 4...g6 5.Bd3 (5.Nf3 Nf6 6.Bd3 Nc7 7.0-0 a5 8.ba5 Bg7 9.Bd2 0-0 10.c4; 5.Bd2 Nf6 6.Bd3 Bg7 7.Nf3 0-0 8.0-0 Nc7 9.c4 d5 10.Nc3; 5.Nc3 Nf6 6.Bd3 Nc7 7.Nf3 Bg7 8.0-0 Bd7 9.Bd2 0-0 10.h3; 5.Bb2 Nf6 6.Nf3 Bg7 7.Bd3 0-0 8.0-0 Nc7 9.c4 Ne6 10.h3) 5...Nf6 6.Nf3 Bg7 7.c4 Bd7 8.0-0 0-0 9.Nc3 Nc7 10.Bd2; C3) 4...Bd7 5.Bd2 (5.Nf3 Nf6 6.Bd2 g6 7.Bd3 Bg7 8.0-0 0-0 9.c4 e5 10.Nc3; 5.Bd3 g6 6.Bd2 Bg7 7.Nf3 Nf6 8.c4 0-0 9.Nc3 e5 10.0-0; 5.Nc3 Nc7 6.Nf3 Nf6 7.Bd2 g6 8.Bd3 Bg7 9.0-0 0-0 10.h3 ; 5.Bb2 Nc7 6.Nf3 a5 7.Nc3 Nf6 8.Bd3 g6 9.0-0 Bg7 10.Qd2) 5...Nf6 6.Nf3 Nc7 7.Bd3 g6 8.0-0 Bg7 9.c4 0-0 10.Nc3; C4) 4...Nf6 5.Bd3 (5.Nf3 Nc7 6.Bd3 g6 7.Bd2 Bf5 8.0-0 Bd3 9.cd3 Bg7 10.Nc3; 5.Bd2 e5 6.Nc3 e4 7.b5 Nc7 8.Nh3 d5 9.bc6 bc6 10.Nf4) 5...Nc7 6.Nf3 g6 7.Bd2 Bg7 8.c4 b5 9.cb5 Nb5 10.a4.

3.d4 e5 =.

3.d4 e6 4.Nf3 Nf6 5.Bb2 Be7 6.Nbd2 0-0 7.c4 a5 8.a3 (8.ba5 Qa5 9.Bd3 Na6=) 8...ab4 9.ab4 Ra1 10.Ba1 c5 11.b5 Nbd7 12.Bd3 b6 13.0-0 Bb7 14.Qc2 Qc7 15.Bb2 Ra8 16.Ra1 Ra1 17.Ba1 cd4 18.ed4 h6 19.Bb2 d5 20.Ne5 Ne5 21.de5 Nd7 22.Nf3 (better 22.cd5!? Qc2 23.Bc2 Bd5 24.Be4=) 22...dc4-/+ 23.Bc4 (better 23.Bh7!? Kh8 24.Be4 Be4 25.Qe4-/+) 23...Bf3-+ 24.gf3 Ne5 25.Be5 Qe5 26.Bd3 g6 27.Be4? (27.Qd2 Bc5-+) 27...Bc5 (27...Qg5!? 28.Kf1 Qb5 29.Qd3-+) 28.Qd3 (28.Qd2 g5-+) 28...Kg7 29.Kg2 h5 30.h3 (30.Qc4 Qg5 31.Kh3 Qg1-+ (31...Bf2?! 32.Bd3-+)) 30...Bd6 (30...Qg5!? 31.Kh1-+) 31.Kf1 f5 32.Bc6 Kf6 33.Qe3 Bc5 34.Qd3 (34.Qe5 Ke5 35.Be8 Kf6-/+) 34...Qd4 (34...Qb2 35.Qd8 Kg7 36.Qh4-+) 35.Qe2 (better 35.Qd4!? Bd4 36.f4-/+) 35...h4 36.Kg2 g5 37.Qa2 Qe5 (37...Ke7!?-+) 38.Qa8-/+ Qd6 (better 38...Qc7!?-/+) 39.Qh8= Kg6?? (39...Kf7 40.Qh5 Kf8 41.Qh6 Kf7 42.Qh5 Kf6 43.Qh8 Ke7 44.Qe8 Kf6 45.Qh8=) 40.Qg8 (40.Be8) 40...Kf6= 41.Qh8 Kg6?? (better 41...Kf7=) 42.Be8 1-0. cipiripi (2215) - algopeor (2225), Rated Blitz game, lichess.org, 2015.

3.d4 Nf6 A) 4.Nc3 A1) 4...Nd5 5.Bd2 (5.Nd5 cd5 6.Nf3 Nc6 7.c4 dc4 8.d5 Ne5 9.Ne5 de5 10.Bc4; 5.Nge2 Nb4 6.a3 Nd5 7.e4 Nf6 8.f3 e5 9.Be3 Be7 10.Ng3) 5...Nb4 6.Nf3 Nd7 7.Rb1 Nd5 8.Bd3 g6 9.0-0 Nc3 10.Bc3; A2) 4...b5 5.a4 Na6 6.ab5 Nb4 7.bc6 Bf5 8.Bd3 Bd3 9.cd3 Rc8 10.Nf3; A3) 4...Qb6 5.Bd2 (5.Rb1 Nd5 6.Bd2 Nd7 7.Nf3 Nc3 8.Bc3 Nf6 9.Bd3 Be6 10.b5; 5.Ba3 Bd7 6.Rb1 g6 7.Nf3 Bg7 8.Bc4 0-0 9.0-0 Qc7 10.Bd3) 5...a5 6.b5 Bd7 7.Rb1 cb5 8.Bb5 Qc7 9.Nf3 Nc6 10.0-0; A4) 4...g6 5.Nf3 (5.Bd3 Na6 6.a3 Nc7 7.Nf3 Bg7 8.0-0 Bd7 9.Bb2 0-0 10.Qd2; 5.Rb1 Bg7 6.Nf3 a5 7.b5 0-0 8.Bd3 cb5 9.Rb5 Nc6 10.0-0; 5.Bd2 Na6 6.a3 Bh6 7.Nf3 Nc7 8.Bd3 0-0 9.0-0 Ncd5 10.Ne2; 5.Be2 Na6 6.Rb1 Nc7 7.Nf3 Ncd5 8.Bd2 Bf5 9.0-0 Bg7 10.Bd3; 5.Qd2 Bg7 6.Nf3 Na6 7.Ba3 0-0 8.Bd3 Nc7 9.0-0 a5 10.h3) 5...Na6 6.a3 Bg7 7.Bd3 Nc7 8.0-0 Bd7 9.Bd2 0-0 10.h3; A5) 4...Na6 5.Rb1 (5.a3 Nc7 6.Nf3 Ncd5 7.Nd5 cd5 8.c4 a5 9.Bd2 ab4 10.ab4; 5.Ba3 Nc7 6.Nf3 a5 7.b5 cb5 8.Nb5 Bd7 9.c4 Nb5 10.cb5) 5...Nc7 6.Nf3 Ncd5 7.Nd5 cd5 8.Bd2 Bf5 9.Bb5 Bd7 10.Bd3; B) 4.Bd3 B1) 4...e5 5.Nc3 (5.Nd2 Qe7 6.Bb2 e4 7.Be2 d5 8.c3 Na6 9.a4 Nc7 10.b5) 5...Qe7 6.de5 de5 7.e4 Qb4 8.Bd2 Qd6 9.Nf3 Nbd7 10.0-0; B2) 4...a5 5.b5 cb5 6.Bb5 Bd7 7.Nc3 g6 8.Nf3 Bg7 9.0-0 0-0 10.a4; B3) 4...Nd5 5.Bd2 c5 6.bc5 dc5 7.Nf3 Nc6 8.0-0 Bg4 9.Nc3 e6 10.Nd5; C) 4.Nd2 C1) 4...Bf5 5.Bb2 (5.Ba3 a5 6.b5 a4 7.Rb1 Nd5 8.bc6 Nc6 9.Qf3 e6 10.e4; 5.Ngf3 Nbd7 6.Bb2 e6 7.Be2 d5 8.c3 a5 9.b5 Qb6 10.Nh4 ; 5.Rb1 b5 6.Ngf3 a5 7.Bd3 Nd5 8.Bb2 Bd3 9.cd3 ab4 10.Qb3) 5...d5 6.Ngf3 e6 7.b5 Bd6 8.c4 0-0 9.c5 Bc7 10.Qb3; C2) 4...a5 5.b5 g6 6.Ngf3 Bg7 7.a4 Nbd7 8.Bd3 0-0 9.0-0 Nd5 10.Ne4; C3) 4...Na6 5.a3 Bf5 6.Ngf3 Nc7 7.Bb2 a5 8.ba5 Ra5 9.Bd3 Bd3 10.cd3; C4) 4...Nbd7 5.Ba3 (5.Ngf3 Nb6 6.Ba3 a5 7.b5 Nbd5 8.c4 Nb4 9.Qb1 Qb6 10.Bb2; 5.c4 a5 6.b5 cb5 7.cb5 Nb6 8.Bd3 Nbd5 9.Ngf3 Nb4 10.Ne4) 5...c5 6.Ngf3 cb4 7.Bb4 Nd5 8.Qb1 Qb6 9.Ba3 N7f6 10.Bd3; D) 4.Nf3 D1) 4...g6 5.Nc3 (5.Bd3 Na6 6.a3 Nc7 7.0-0 Bg7 8.Bb2 0-0 9.c4 Ne6 10.Nc3; 5.Bd2 Bg7 6.Bd3 Na6 7.0-0 0-0 8.a3 Nc7 9.Qe2 Bd7 10.c4; 5.Ba3 Bg7 6.Nc3 0-0 7.Bd3 Na6 8.0-0 Nc7 9.e4 a5 10.h3) 5...Bg7 6.Bd3 Na6 7.a3 Nc7 8.Bd2 0-0 9.0-0 Ne6 10.h3; D2) 4...Na6 5.a3 (5.Bd2 g6 6.b5 Nc7 7.bc6 bc6 8.Nc3 Rb8 9.Rb1 Be6 10.Bd3; 5.Ba3 Nc7 6.Nc3 a5 7.b5 cb5 8.Nb5 Bd7 9.Qb1 g6 10.Nc3) 5...Nc7 6.Bb2 a5 7.Nc3 ab4 8.ab4 Ra1 9.Qa1 Ncd5 10.Nd5.

4.a3 A) 4...a5 5.ba5 Qa5 6.Bd2 Qb6 7.Nc3 Nf6 8.Nf3 g6 9.e4 Nbd7 10.Bc4; B) 4...Bf5 5.Bd3 (5.Nc3 Nf6 6.Bd3 Bd3 7.Qd3 Nbd7 8.Nf3 a5 9.ba5 Qa5 10.0-0; 5.Nf3 Nf6 6.Bd3 Bd3 7.Qd3 e6 8.Nbd2 d5 9.c4 Nbd7 10.0-0; 5.Bb2 Nf6 6.Nd2 d5 7.Ngf3 a5 8.c4 ab4 9.c5 Qd8 10.ab4; 5.Nd2 Nf6 6.Ngf3 Nbd7 7.Nc4 Qc7 8.Bd3 Bd3 9.cd3 e6 10.0-0) 5...Bd3 6.Qd3 Nf6 7.Nf3 Nbd7 8.Nc3 e6 9.0-0 Be7 10.e4; C) 4...Nd7 5.Nf3 (5.Nc3 Ngf6 6.Nf3 a5 7.b5 Nd5 8.Na4 Qc7 9.Bd3 N7f6 10.e4; 5.Nd2 d5 6.Ngf3 Ngf6 7.Bd3 a5 8.ba5 Qa5 9.0-0 c5 10.Nb3) 5...Ngf6 6.Bd3 a5 7.ba5 Qa5 8.Bd2 Qh5 9.Nc3 g6 10.0-0; D) 4...Nf6 5.Nf3 (5.Nc3 a5 6.ba5 Ra5 7.Nf3 Nbd7 8.Bd3 e6 9.0-0 Be7 10.e4) 5...Bf5 6.Nc3 a5 7.Rb1 ab4 8.Rb4 Qc7 9.Bd3 Bd3 10.cd3.

4.Nc3 A) 4...Qb4 5.Bd2 (5.Qd2 Nf6 6.Nf3 Na6 7.a3 Qa5 8.Bb2 g6 9.Bc4 Bg7 10.0-0) 5...Qa3 6.Rb1 Nf6 7.Rb3 Qa5 8.Nf3 Na6 9.Be2 Qc7 10.0-0; B) 4...Nf6 5.Bd2 (5.Rb1 Nd5 6.Na4 Qc7 7.c4 Bf5 8.Bd3 Bd3 9.Qd3 b5 10.cd5; 5.a3 a5 6.ba5 Qa5 7.Bd2 Nbd7 8.Nf3 g6 9.Bd3 Bg7 10.0-0) 5...Bf5 6.Nf3 Nbd7 7.Bd3 Bd3 8.cd3 e6 9.0-0 Be7 10.e4.

4.Bd3 A1) 4...Nf6 5.Nf3 g6 6.0-0 Na6 7.a3 Bg7 8.Nc3 Bd7 9.e4 0-0 10.h3; B) 4...Na6 5.a3 (5.c3 Nf6 6.Nf3 g6 7.0-0 Bg7 8.Nbd2 0-0 9.Bb2 Nd5 10.h3) 5...Nf6 6.Nf3 g6 7.0-0 Bh6 8.Nc3 0-0 9.h3 Nd5 10.Nd5; C) 4...g6 5.Nf3 (5.c3 Nf6 6.Nd2 d5 7.Qc2 Nbd7 8.Ngf3 a5 9.b5 cb5 10.0-0; 5.Nd2 Nf6 6.a3 d5 7.Ngf3 Bf5 8.0-0 Nbd7 9.Bb2 e6 10.Bf5; 5.Nc3 Nf6 6.Nf3 Nd5 7.Nd5 cd5 8.Bd2 Bf5 9.Rc1 Bg7 10.0-0; 5.a3 Nf6 6.Nf3 Be6 7.Nc3 Bh6 8.0-0 Nbd7 9.e4 Bc1 10.Qc1) 5...Nf6 6.0-0 Bg7 7.Nc3 0-0 8.Bd2 Nbd7 9.Re1 e5 10.b5; D) 4...g5 5.a3 (5.Nc3 Nf6 6.Bd2 Na6 7.a3 Bg7 8.Nf3 g4 9.Nh4 h5 10.0-0; 5.Bd2 Na6 6.a3 Nf6 7.Nc3 Bh6 8.Nf3 g4 9.Nh4 d5 10.0-0; 5.c3 Nf6 6.Nd2 Na6 7.Ne2 Rg8 8.0-0 Be6 9.Ng3 0-0-0 10.a4) 5...Nf6 6.Nf3 g4 7.Nfd2 d5 8.Nc3 Na6 9.0-0 Bg7 10.Bb2; E) 4...d5 5.Nf3 (5.Nc3 Qb4 6.Bd2 Qd6 7.e4 Na6 8.Nge2 Nb4 9.0-0 Nd3 10.cd3; 5.a3 Nf6 6.Nf3 g6 7.Nc3 Bf5 8.0-0 Nbd7 9.Bb2 Bg7 10.h3; 5.Bd2 Nf6 6.Nc3 g6 7.Nf3 Bf5 8.0-0 Nbd7 9.Qe2 Bh6 10.Rab1; 5.c3 Nf6 6.Nd2 g6 7.Qc2 Nbd7 8.Ngf3 Bg7 9.0-0 0-0 10.h3; 5.Nd2 Qb4 6.Ngf3 Nf6 7.0-0 Nbd7 8.a3 Qa4 9.Nb1 g6 10.Bd2) 5...Nf6 6.Nc3 g6 7.0-0 Bf5 8.Bd2 Nbd7 9.Qe2 Bh6 10.Rab1; F) 4...Nd7 5.Nf3 (5.Bd2 Ngf6 6.Nf3 e5 7.Nc3 Be7 8.0-0 0-0 9.Qb1 Qc7 10.Qb3; 5.Nc3 Ngf6 6.Nf3 Qb4 7.Bd2 Qa3 8.0-0 g6 9.e4 Bg7 10.Rb1) 5...Ngf6 6.Bd2 e5 7.Nc3 Be7 8.0-0 0-0 9.Rb1 Qc7 10.Qe2; G) 4...Nh6 5.Nf3 (5.Ne2 Nd7 6.Nbc3 Nf6 7.0-0 d5 8.f3 Nf5 9.Bd2 g6 10.Na4; 5.Nc3 Qb4 6.Bd2 Qa3 7.Rb1 Nd7 8.Nf3 d5 9.e4 de4 10.Rb3) 5...Nd7 6.Bd2 Nf6 7.Nc3 Bf5 8.e4 Bg6 9.0-0 d5 10.Qe2; H) 4...a5 5.ba5 Ra5 6.Nf3 Nf6 7.Bd2 Rh5 8.Nc3 Na6 9.Rb1 Qc7 10.e4.

4.Nf3 A) 4...d5 5.Bd3 (5.Nc3 Nf6 6.Bd3 Qb4 7.Bd2 Qa3 8.0-0 Nbd7 9.e4 Ne4 10.Ne4; 5.Bd2 Nf6 6.Nc3 Bf5 7.Bd3 Bd3 8.cd3 e6 9.0-0 Nbd7 10.Rb1) 5...Nf6 6.Nc3 Qb4 7.Bd2 Qd6 8.0-0 Nbd7 9.Re1 Nb6 10.e4; B) 4...Bf5 5.Bd3 (5.Nc3 Nf6 6.Bd3 g6 7.0-0 Nbd7 8.Rb1 d5 9.Qe2 Bg7 10.h3) 5...Bd3 6.Qd3 Nf6 7.Nc3 d5 8.0-0 Nbd7 9.a3 e6 10.e4; C) 4...Na6 5.a3 (5.c3 Bf5 6.Bd3 Bd3 7.Qd3 Nf6 8.0-0 Qb5 9.Qc2 g5 10.a4) 5...Nf6 6.Nc3 g6 7.Bd2 Bd7 8.Bc4 Bg7 9.e4 0-0 10.0-0; D) 4...Nd7 5.Bd2 (5.Bd3 Ngf6 6.Bd2 e5 7.Nc3 Be7 8.0-0 0-0 9.Rb1 Qc7 10.Qe2) 5...Ngf6 6.Bd3 g6 7.0-0 Bg7 8.c4 0-0 9.Nc3 Qc7 10.Qb3; E) 4...Bg4 5.Nbd2 (5.Bd3 Nf6 6.h3 Bh5 7.Bd2 Na6 8.a3 Nc7 9.Nc3 Ne6 10.0-0; 5.h3 Bf3 6.Qf3 Qb4 7.Nd2 Qc3 8.Rb1 Qc2 9.Ba3 Qc3 10.Rb3; 5.Bd2 Nf6 6.Nc3 Na6 7.a3 Nd5 8.h3 Nc3 9.Bc3 Bh5 10.a4; 5.Nc3 Nf6 6.Bd2 a5 7.b5 d5 8.h3 Bf5 9.Rb1 Qc7 10.Bd3; 5.a3 a5 6.ba5 Qa5 7.Bd2 Qh5 8.Nc3 Nf6 9.Be2 e5 10.de5; 5.Ba3 Na6 6.Nbd2 Nf6 7.c3 0-0-0 8.Bd3 d5 9.h3 Bh5 10.0-0) 5...Nf6 6.a3 Nbd7 7.Bd3 a5 8.Nc4 Qc7 9.Na5 b6 10.Nb3; F) 4...g6 5.Nc3 (5.Bd2 Nf6 6.Nc3 Bg7 7.Bd3 Na6 8.a3 0-0 9.0-0 Be6 10.Qe2; 5.Bd3 Nf6 6.0-0 Na6 7.c3 Bf5 8.Na3 d5 9.b5 Bd3 10.Qd3; 5.c3 Nf6 6.Nbd2 d5 7.Be2 Bg7 8.0-0 Bf5 9.Nh4 Be6 10.f4; 5.a3 Nf6 6.Bd3 Nbd7 7.Bd2 Bg7 8.Nc3 0-0 9.0-0 Re8 10.b5; 5.Be2 Nf6 6.0-0 Bg7 7.Nc3 Na6 8.Rb1 0-0 9.Qd2 Nd5 10.Na4; 5.c4 Nf6 6.c5 Qc7 7.Nc3 Na6 8.Rb1 dc5 9.bc5 Bg7 10.Bd3) 5...Nf6 6.Bd2 Bg7 7.Bd3 0-0 8.0-0 Nbd7 9.h3 d5 10.Qe2; G) 4...Nf6 5.Bd3 (5.Bd2 Bf5 6.Nc3 Nbd7 7.Bd3 Bd3 8.cd3 e5 9.0-0 Be7 10.Rb1; 5.a3 a5 6.ba5 Ra5 7.Nbd2 Qc7 8.Bd3 Nbd7 9.0-0 Rh5 10.h3) 5...d5 6.Nc3 Qb4 7.Bd2 Qa3 8.Rb1 Nbd7 9.0-0 g6 10.Rb3.

4.Nc3 A) 4...Nf6 5.Nf3 (5.Rb1 Na6 6.Bd3 Qb6 7.Ba3 g6 8.Nf3 Bg7 9.0-0 0-0 10.Qd2; 5.Bd2 g6 6.Nf3 Bg7 7.Bd3 Na6 8.a3 0-0 9.0-0 Nc7 10.h3; 5.Bd3 Nd5 6.Nd5 cd5 7.Nf3 Nc6 8.c3 e6 9.0-0 Be7 10.e4) 5...Na6 6.Rb1 g6 7.Bd3 Bg7 8.0-0 0-0 9.e4 Nc7 10.h3; B) 4...g6 5.Bd3 (5.a3 Nf6 6.Nf3 a5 7.Bd2 Bg7 8.Be2 Na6 9.Qb1 0-0 10.0-0; 5.Rb1 Bg7 6.Be2 Nf6 7.Nf3 0-0 8.0-0 Na6 9.e4 Nc7 10.a4; 5.Nf3 Nf6 6.e4 Bg7 7.Bc4 0-0 8.0-0 Na6 9.Ba6 ba6 10.Bg5; 5.Ba3 Nf6 6.Nf3 Bg7 7.Bc4 a5 8.b5 cb5 9.Nb5 0-0 10.0-0; 5.Be2 Na6 6.Nf3 Nf6 7.0-0 Bg7 8.e4 0-0 9.Rb1 Nc7 10.a4; 5.Bd2 Nf6 6.Nf3 Bg7 7.Bd3 Na6 8.Rb1 0-0 9.0-0 Nc7 10.h3; 5.Nh3 Nf6 6.Bd3 a5 7.b5 cb5 8.Nb5 Nc6 9.0-0 Nb4 10.a4) 5...Na6 6.Rb1 Nf6 7.Nge2 Bg7 8.0-0 0-0 9.e4 Nc7 10.h3; C) 4...a5 5.b5 Nf6 6.Nf3 g6 7.a4 Bg7 8.Bd3 0-0 9.0-0 Qb6 10.Ba3; D) 4...Na6 5.Rb1 (5.a3 Nc7 6.Bb2 Nf6 7.Bd3 g6 8.Nge2 Bg7 9.0-0 0-0 10.g3; 5.Ba3 Nf6 6.Nf3 g6 7.Bd3 Bg7 8.0-0 0-0 9.Qd2 Nc7 10.e4) 5...Nf6 6.Nf3 g6 7.Bd3 Bg7 8.0-0 Nc7 9.e4 0-0 10.h3.

4.Bd2 A) 4...Na6 5.Nf3 (5.a3 Nf6 6.Nf3 g6 7.Bd3 Bg7 8.0-0 0-0 9.c4 e5 10.Nc3; 5.Na3 Nf6 6.Nf3 g6 7.Bd3 Bg7 8.0-0 0-0 9.Qe2 Nc7 10.Nc4; 5.Ba6 ba6 6.Nf3 Nf6 7.Nc3 Qb6 8.e4 g6 9.0-0 Bg7 10.e5) 5...Nf6 6.a3 Qb6 7.Nc3 g6 8.Bc4 d5 9.Bd3 Bg7 10.Ne5; B) 4...Nf6 5.Nf3 (5.Bd3 e5 6.Nc3 Qe7 7.Nge2 Na6 8.Rb1 e4 9.Ba6 ba6 10.0-0; 5.Nc3 g6 6.Nf3 Bg7 7.Bd3 Na6 8.Qb1 Nc7 9.0-0 0-0 10.h3) 5...Na6 6.Bd3 g6 7.0-0 Bh6 8.a3 Nc7 9.c4 Ne6 10.Nc3; C) 4...g6 5.Bd3 (5.Nf3 Nf6 6.Bd3 Bg7 7.Qe2 Na6 8.0-0 0-0 9.a3 Nc7 10.c4; 5.Nc3 Nf6 6.Nf3 Bg7 7.Bd3 Na6 8.Rb1 0-0 9.0-0 Nc7 10.Qe2) 5...Nf6 6.Nf3 Bg7 7.0-0 0-0 8.a3 Na6 9.c4 e5 10.Nc3; D) 4...a5 5.ba5 Nf6 6.Nf3 c5 7.dc5 dc5 8.Be2 Nc6 9.0-0 g6 10.Nc3.

4.Nd2 A) 4...Nf6 5.Ngf3 (5.Bb2 a5 6.ba5 Qa5 7.Ngf3 Na6 8.c3 g6 9.Bd3 Bg7 10.0-0) 5...a5 6.ba5 Qa5 7.Bb2 Na6 8.c3 g6 9.Bd3 Bg7 10.0-0; B) 4...a5 5.Bb2 (5.Ngf3 ab4 6.Bd3 Nf6 7.0-0 g6 8.e4 Bg7 9.Rb1 c5 10.dc5; 5.ba5 Qa5 6.Ngf3 Na6 7.Bb2 Nf6 8.c3 g6 9.Bd3 Bg7 10.0-0) 5...Nf6 6.ba5 Qa5 7.Ngf3 c5 8.Bd3 d5 9.dc5 Nc6 10.0-0.

4.Bd3 A) 4...g6 5.Nf3 (5.Bd2 Nf6 6.Nf3 Na6 7.a3 Bg7 8.0-0 0-0 9.c4 Nc7 10.Nc3; 5.Nc3 Na6 6.Ba3 Nf6 7.Nge2 Bh6 8.0-0 0-0 9.Ng3 Qb6 10.Rb1; 5.Ne2 Na6 6.a3 Nf6 7.Nbc3 Bg7 8.0-0 Nc7 9.e4 0-0 10.f3; 5.c4 Na6 6.a3 Bg7 7.Nf3 c5 8.b5 Nc7 9.0-0 Ne6 10.Bb2; 5.Nd2 Na6 6.a3 Nf6 7.Ngf3 Bg7 8.0-0 0-0 9.Bb2 Nc7 10.Qe2) 5...Nf6 6.0-0 Bg7 7.Bd2 Na6 8.a3 0-0 9.c4 Nc7 10.Nc3; B) 4...Nf6 5.Nf3 (5.Nc3 Na6 6.Rb1 g6 7.Nf3 Bg7 8.0-0 0-0 9.e4 Nc7 10.a4) 5...a5 6.ba5 c5 7.0-0 Qa5 8.Bd2 Qb6 9.Nc3 Nc6 10.Rb1; C) 4...a5 5.ba5 Na6 6.Bd2 Nf6 7.Nf3 c5 8.a3 Rc8 9.0-0 c4 10.Be2; D) 4...b5 5.Bd2 (5.Nf3 a5 6.ba5 Qa5 7.Qd2 Qd2 8.Bd2 Nf6 9.Nc3 Na6 10.0-0; 5.a3 Nf6 6.Nf3 a5 7.ba5 c5 8.dc5 dc5 9.Bd2 c4 10.Be2; 5.a4 Nf6 6.Nf3 Na6 7.Bd2 Qb6 8.0-0 g6 9.Na3 Nd5 10.Rb1) 5...Nf6 6.Nf3 g5 7.h3 Na6 8.c4 bc4 9.Bc4 Qb6 10.Qa4; E) 4...Qb6 5.Nd2 (5.Nf3 Nf6 6.0-0 Na6 7.c3 g6 8.Nbd2 Bg7 9.e4 0-0 10.Nc4; 5.Ne2 Nf6 6.Nd2 Na6 7.c3 d5 8.0-0 g6 9.Nf3 Bg7 10.Ne5) 5...Nf6 6.Ngf3 Nd5 7.0-0 Nb4 8.Be2 N8a6 9.e4 f5 10.a3; F) 4...h6 5.Nf3 (5.Nc3 Nf6 6.Nf3 a5 7.b5 cb5 8.Nb5 Nc6 9.0-0 Nb4 10.a4; 5.Ne2 Nf6 6.0-0 Na6 7.a3 g6 8.Nbc3 Bg7 9.e4 0-0 10.f3; 5.Nd2 Nf6 6.Ne2 Na6 7.c3 Nc7 8.Qb3 g6 9.0-0 Bg7 10.Bb2; 5.Bd2 Na6 6.Nf3 Nf6 7.a3 g6 8.Nc3 Bg7 9.0-0 0-0 10.e4) 5...Na6 6.a3 Nf6 7.0-0 Nc7 8.c4 a5 9.ba5 Ne6 10.Nc3; G) 4...h5 5.Nf3 (5.Nc3 Nf6 6.Nf3 a5 7.b5 cb5 8.Nb5 Nc6 9.0-0 g6 10.a3; 5.Bd2 g6 6.Nf3 Na6 7.a3 Bg7 8.c4 Nf6 9.Nc3 0-0 10.0-0; 5.Ne2 Nf6 6.Nbc3 a5 7.b5 cb5 8.Nb5 Nc6 9.0-0 Nb4 10.a4; 5.Nd2 Nf6 6.Ne2 h4 7.c3 h3 8.g3 a5 9.ba5 Qa5 10.Qb3) 5...Na6 6.a3 Nf6 7.Bd2 g6 8.Nc3 Bg7 9.0-0 0-0 10.e4; H) 4...d5 5.Nf3 (5.Nc3 e6 6.Rb1 Na6 7.a3 Nf6 8.Nf3 Bd6 9.0-0 Qc7 10.b5; 5.Bd2 Nf6 6.Nf3 a5 7.ba5 c5 8.0-0 c4 9.Be2 Nc6 10.Ne5; 5.Nd2 a5 6.ba5 Qa5 7.Ngf3 c5 8.dc5 Na6 9.Ne5 Nc5 10.Nd7; 5.Bb2 a5 6.Nf3 Nf6 7.Ne5 ab4 8.Nd2 g6 9.0-0 Bg7 10.Qe2) 5...Nf6 6.Ne5 a5 7.ba5 c5 8.0-0 c4 9.Be2 Nc6 10.Bd2; I) 4...Na6 5.a3 (5.Bd2 Nf6 6.Nf3 g6 7.a3 Bg7 8.0-0 0-0 9.c4 Nc7 10.Nc3; 5.c3 Nf6 6.Nf3 g6 7.Nbd2 Bg7 8.0-0 0-0 9.Bb2 Nc7 10.Qb3) 5...Nf6 6.Nf3 g6 7.0-0 Nc7 8.Bd2 Bg7 9.c4 0-0 10.Nc3.

4.Nf3 Qc8 (4...Na6 5.Bd2 (5.a3 Nc7 6.Bd3 Nf6 7.0-0 g6 8.c4 Bh6 9.Nc3 0-0 10.Bd2; 5.c3 Nf6 6.Bd3 g6 7.Nbd2 Bg7 8.0-0 0-0 9.Bb2 Nc7 10.Qb3; 5.Ba3 Nf6 6.Nc3 Nc7 7.Bd3 Ncd5 8.Nd5 cd5 9.c4 dc4 10.Bc4) 5...Nf6 6.a3 g6 7.Bd3 Bg7 8.0-0 0-0 9.c4 Nc7 10.Nc3; 4...Nf6 5.Bd2 (5.Bd3 Na6 6.a3 Nc7 7.0-0 g6 8.Bd2 Bg7 9.c4 0-0 10.Nc3; 5.Nc3 Na6 6.a3 Nc7 7.Bd3 g6 8.0-0 Bg7 9.h3 0-0 10.Bd2) 5...g6 6.Nc3 Bg7 7.Bd3 Na6 8.Rb1 0-0 9.0-0 Nc7 10.Qe2; 4...a5 5.ba5 Nf6 6.Bd3 c5 7.0-0 Qa5 8.Bd2 Qb6 9.Nc3 Nc6 10.Rb1) 5.Bd3 (5.Bd2 Na6 6.Bd3 Nf6 7.0-0 g6 8.a3 Bg7 9.c4 Bf5 10.Qe2; 5.Bb2 a5 6.b5 cb5 7.Bd3 Nf6 8.0-0 b4 9.Nbd2 Nc6 10.e4; 5.Nc3 Nf6 6.Bd3 a5 7.b5 cb5 8.Nb5 Na6 9.0-0 Nb4 10.a4; 5.Nbd2 Nf6 6.c3 Bf5 7.Nh4 g6 8.Bb2 Be6 9.Bd3 Nbd7 10.0-0; 5.Be2 Na6 6.Ba3 Nf6 7.0-0 g6 8.Nc3 Bg7 9.Qd2 Nc7 10.Bd3) 5...h5 (5...d5 6.0-0+= (6.Nc3 Nf6 7.0-0 a5 8.b5 cb5 9.Nb5 Nc6 10.Ba3) 6...Nf6 7.Nc3 a5 8.ba5 c5 9.e4 c4 10.Be2; 5...Nf6 6.0-0 Na6 7.a3 g6 8.Nc3 Bg7 9.e4 0-0 10.e5) 6.Nc3 (6.0-0 Nf6 7.Nc3 a5 8.ba5 c5 9.Bd2 c4 10.Be2) 6...Nh6 (6...Nf6 7.0-0 Na6 8.a3 Nc7 9.e4 h4 10.h3) 7.0-0 Bg4 (7...Na6 8.Rb1 Nc7 9.Bd2 g6 10.e4) 8.h3 Bh3 (8...Bd7 9.e4 a5 10.ba5) 9.gh3 Qh3 10.Ng5 (10.e4+– 3.16) 10...Qh4 11.e4 Ng4 12.Nf3 Qh3 13.e5 f5? (better is 13...de5 14.Ne4 Nf6+/–) 14.ed6 g5 (14...Nd7 15.Re1 Nh6 16.Qe2 Qg4 17.Kh2+–) 15.Qe2 (15.Bf5 Bg7 16.Ne4 h4+–) 15...Nf6 16.Re1 (16.Bg5?! Rg8 17.Qe3 Nbd7+–) 16...g4 (16...Rg8 17.de7 Bh6+–) 17.Ng5 Qh4 (17...Rh7 18.Qe6 Nbd7 19.Nh3 gh3 20.Bf5 Rg7 21.Kh1 0-0-0+–) 18.Qe7! Be7 (18...Be7 19.Re7 Mate attack) 19.Re7 Kd8 (19...Kf8 20.Ne6 Kg8 21.Rg7) 20.Ne6 Kc8 21.Rc7 1–0. usingprogram – lydnils, internet, 2011.

4.Nc3 A) 4...d5 5.Nf3 (5.Bd3 e6 6.a3 Nf6 7.Nf3 Bd6 8.0-0 0-0 9.Qe2 Nbd7 10.e4; 5.Rb1 Nf6 6.Nge2 Nbd7 7.Ng3 Bg6 8.h4 h6 9.Bd3 e6 10.Bg6; 5.Nge2 Nf6 6.Ng3 Bg6 7.h4 h5 8.Bd3 Bd3 9.cd3 e6 10.Rb1; 5.Nh3 e6 6.a3 Nf6 7.Bd3 Bd6 8.Nf4 Nbd7 9.0-0 0-0 10.Bd2; 5.a3 Nf6 6.Nf3 Nbd7 7.Bd3 Bd3 8.cd3 e6 9.0-0 Be7 10.e4; 5.g4 Bg6 6.Nf3 Nf6 7.Ne5 e6 8.a3 Nbd7 9.Ng6 hg6 10.g5; 5.Bd2 Nf6 6.Nf3 e6 7.b5 a6 8.Nh4 ab5 9.Nf5 ef5 10.Bd3; 5.Be2 e6 6.a3 Bd6 7.Nf3 Nd7 8.0-0 Ngf6 9.Nh4 0-0 10.Nf5) 5...e6 6.b5 a6 7.ba6 Na6 8.Bd3 Nf6 9.0-0 Bb4 10.Bb2; B) 4...e6 5.a3 (5.Bd3 Nf6 6.e4 Bg6 7.Nge2 d5 8.e5 Ne4 9.Rb1 Nc3 10.Nc3; 5.Rb1 d5 6.Nge2 Nd7 7.Ng3 Bg6 8.h4 h5 9.Bd3 Bd3 10.Qd3; 5.g4 Bg6 6.Nf3 Nd7 7.h4 h5 8.g5 d5 9.Rb1 Ne7 10.Bd3; 5.Nge2 Nf6 6.Ng3 Bg6 7.Rb1 Nbd7 8.h4 h6 9.Bd3 Bd3 10.cd3; 5.e4 Bg6 6.Rb1 Nf6 7.Bd3 d5 8.e5 Ne4 9.Nge2 Nc3 10.Nc3) 5...a5 6.b5 Nf6 7.Nf3 d5 8.Bd3 cb5 9.Nb5 Nc6 10.0-0; C) 4...Nd7 5.Nf3 (5.Bd3 Bd3 6.cd3 Ngf6 7.Nf3 e5 8.0-0 Be7 9.e4 0-0 10.Rb1; 5.Rb1 Ngf6 6.Bd3 Bd3 7.Qd3 d5 8.Nf3 e6 9.0-0 Bd6 10.b5) 5...Ngf6 6.Bd3 Bd3 7.cd3 e5 8.0-0 Be7 9.Bd2 0-0 10.Qb3; D) 4...a5 5.b5 Nf6 6.Nf3 g6 7.Bd3 cb5 8.e4 Bd7 9.0-0 b4 10.e5; E) 4...Nf6 5.Nf3 (5.Bd3 e6 6.Bf5 ef5 7.Nf3 d5 8.Rb1 Bd6 9.Qd3 g6 10.0-0; 5.Rb1 d5 6.Nge2 Nbd7 7.Ng3 Bg6 8.h4 h5 9.Bd3 Bd3 10.Qd3; 5.Ba3 Nd5 6.Nge2 Nd7 7.e4 Nc3 8.Nc3 Be6 9.d5 cd5 10.Nd5) 5...d5 6.Rb1 e6 7.b5 Bd6 8.Bd3 0-0 9.0-0 Nbd7 10.bc6.

4.Bd3 A) 4...e6 5.e4 (5.Nf3 Nf6 6.Nc3 d5 7.Rb1 Bd6 8.Bf5 ef5 9.0-0 0-0 10.Qd3; 5.Bf5 ef5 6.Nf3 Nf6 7.Qd3 d5 8.Nbd2 Bb4 9.0-0 Ne4 10.a3; 5.Nc3 d5 6.Rb1 Nf6 7.Nf3 Bd6 8.0-0 0-0 9.Qe2 Nbd7 10.e4; 5.Nd2 Bd3 6.cd3 Nf6 7.Ngf3 d5 8.0-0 Nbd7 9.Rb1 Be7 10.b5; 5.Ne2 d5 6.Bf5 ef5 7.Qd3 Bb4 8.Nd2 Na6 9.Qf5 Qf6 10.Qh3; 5.Bd2 Bd3 6.cd3 Nf6 7.Nf3 d5 8.0-0 Nbd7 9.Qb3 Qb6 10.Nc3; 5.Ba3 d5 6.Nf3 Na6 7.0-0 Bd3 8.Qd3 Nb4 9.Qd2 Qb6 10.c3) 5...Bg6 6.Nf3 d5 7.ed5 cd5 8.0-0 Nf6 9.a3 Bd6 10.Nc3; B) 4...Qd7 5.Nf3 (5.Nc3 Na6 6.Ba3 Bd3 7.cd3 Nf6 8.Nf3 g6 9.0-0 Bg7 10.Qb3; 5.Ne2 Na6 6.a3 Nf6 7.Nbc3 Bd3 8.Qd3 g6 9.0-0 Bg7 10.e4; 5.Bd2 Nf6 6.Nf3 Na6 7.0-0 g6 8.a3 Bg7 9.Nc3 Bd3 10.cd3) 5...Na6 6.a3 Nf6 7.Nc3 Nd5 8.Bb2 Bd3 9.Qd3 g6 10.0-0; C) 4...Bd3 5.Qd3 Nf6 6.Nf3 e6 7.Nc3 d5 8.Rb1 Bd6 9.e4 de4 10.Ne4.

4.Nf3 A1) 4...Nf6 5.Bd3 (5.Nc3 d5 6.Nh4 Bg4 7.Qd2 Nbd7 8.f3 Be6 9.f4 g6 10.Bd3; 5.Ba3 e6 6.Bd3 a5 7.b5 cb5 8.Bb5 Nbd7 9.c4 Be7 10.0-0) 5...e6 6.0-0 d5 7.Ba3 Bd3 8.Qd3 Nbd7 9.Nbd2 Bd6 10.b5; B) 4...d5 5.Bd3 (5.a3 a5 6.b5 Nf6 7.Bd3 Ne4 8.Bb2 cb5 9.Nc3 Nc6 10.Bb5; 5.Nc3 e6 6.Rb1 Bd6 7.Bd3 Nf6 8.0-0 0-0 9.b5 Nbd7 10.bc6; 5.Be2 e6 6.0-0 Nf6 7.Nh4 Bg6 8.a3 a5 9.ba5 Qa5 10.Bd2; 5.Ba3 e6 6.Nbd2 a5 7.Rb1 Nf6 8.Bd3 Qc7 9.Bf5 ef5 10.0-0; 5.c4 Nf6 6.Nc3 e6 7.c5 Nbd7 8.Bd3 Be7 9.0-0 0-0 10.Qc2; 5.Nbd2 e6 6.Rb1 Bd6 7.Nb3 Nd7 8.Nc5 Qc7 9.Nd7 Kd7 10.Ne5) 5...e6 6.Bf5 ef5 7.Qd3 Nf6 8.Nbd2 Bb4 9.Rb1 Qe7 10.Qf5; C) 4...Na6 5.a3 (5.Nc3 Nf6 6.Rb1 Nc7 7.Bd3 Bd3 8.Qd3 Ncd5 9.Bd2 Qb6 10.0-0; 5.Ba3 Qb6 6.Nbd2 d5 7.Nh4 Bd7 8.Bd3 Nf6 9.0-0 g6 10.Ndf3; 5.Bd2 Nf6 6.a3 Nc7 7.Bd3 g6 8.0-0 Qd7 9.Nc3 Bd3 10.cd3) 5...Nf6 6.Bd3 g6 7.Nc3 Nd5 8.Bb2 Bd3 9.cd3 Nc3 10.Bc3; D) 4...Nd7 5.Bd3 (5.Nc3 d5 6.Bd3 e6 7.Rb1 Ngf6 8.Bf5 ef5 9.Qd3 g6 10.b5) 5...Bd3 6.Qd3 e6 7.Nc3 d5 8.b5 cb5 9.Qb5 Ngf6 10.Bd2; E) 4...g6 5.Nc3 (5.Bd3 Nf6 6.Nc3 d5 7.0-0 Qd6 8.b5 Nbd7 9.Bb2 Bg7 10.bc6; 5.Ba3 Nf6 6.Nc3 Nbd7 7.Bd3 Bd3 8.Qd3 Bg7 9.0-0 0-0 10.h3; 5.Bd2 Nf6 6.Nc3 Na6 7.Rb1 Nc7 8.Bd3 Ncd5 9.0-0 Qd7 10.a4; 5.Bb2 Nf6 6.Nc3 Nbd7 7.Bd3 Qb6 8.a3 Bd3 9.Qd3 Bg7 10.0-0; 5.Nbd2 Nf6 6.Bd3 Bd3 7.cd3 Bg7 8.0-0 Nbd7 9.Bb2 0-0 10.Qb3; 5.Qd2 Nf6 6.Nc3 Nbd7 7.Bd3 Bd3 8.Qd3 d5 9.0-0 e6 10.Rb1; 5.Be2 Na6 6.Ba3 Nf6 7.Nc3 Bg7 8.Bd3 Bd3 9.Qd3 0-0 10.0-0; 5.Bc4 Na6 6.a3 Nf6 7.Nc3 Nc7 8.0-0 Ncd5 9.Bb2 Bg7 10.Bd3) 5...Nf6 6.Bd3 d5 7.0-0 Qd6 8.Re1 Nbd7 9.e4 de4 10.Ne4; F) 4...e6 5.Bd3 (5.Bd2 Nf6 6.Bd3 d5 7.0-0 Bd6 8.Nc3 0-0 9.Qe2 Ne4 10.h3; 5.c4 a5 6.b5 cb5 7.cb5 Nd7 8.Bd3 Rc8 9.Bb2 Ngf6 10.Bf5; 5.Nbd2 d5 6.Bd3 Nf6 7.0-0 Nbd7 8.Bf5 ef5 9.c4 Be7 10.Qb3; 5.Ba3 d5 6.c4 Nf6 7.Nc3 a5 8.c5 ab4 9.Bb4 b6 10.Ne5; 5.a3 d5 6.Bd3 Nf6 7.Bf5 ef5 8.Qd3 g6 9.c4 a5 10.Nbd2) 5...Nf6 6.0-0 d5 7.Ba3 Bd3 8.cd3 a5 9.Qa4 Nbd7 10.b5.

4.a3 A) 4...Nc7 5.Bb2 (5.Nc3 Nf6 6.Bb2 g6 7.Bd3 Bg7 8.Ne4 e5 9.0-0 0-0 10.Qe2) 5...Nf6 6.Bd3 a5 7.Nc3 Bd7 8.0-0 Na6 9.b5 Nc5 10.Qe2; B) 4...Bd7 5.Bb2 (5.Nc3 Nf6 6.Bc4 g6 7.Bb2 Bg7 8.h3 0-0 9.0-0 Nc7 10.Qe2; 5.Bc4 Nf6 6.Nc3 g6 7.Bb2 Bg7 8.Ne4 0-0 9.Nf6 ef6 10.0-0; 5.Be2 Nf6 6.Bb2 Qb6 7.c4 g6 8.Bd4 Qc7 9.Bf6 ef6 10.Nc3; 5.Bd3 Nf6 6.Bb2 e5 7.Nc3 Be7 8.0-0 0-0 9.Qe2 Nc7 10.Ng5) 5...Nf6 6.Bd3 Qb6 7.Nc3 Rc8 8.Qe2 c5 9.b5 Nc7 10.0-0; C) 4...c5 5.Nc3 (5.b5 Nc7 6.Bb2 Nf6 7.Nc3 g6 8.Ne4 Bg7 9.Nf6 Bf6 10.Bf6) 5...Nf6 6.Rb1 Bd7 7.Bc4 cb4 8.ab4 Rc8 9.Qe2 Qc7 10.Ba6; D) 4...Bg4 5.Nc3 (5.Be2 Nf6 6.Nc3 g6 7.Bb2 Bg7 8.h3 Bd7 9.Ne4 0-0 10.Nf6; 5.Bb2 Nf6 6.Nc3 c5 7.b5 Nc7 8.Bd3 g6 9.h3 Bd7 10.Ne4; 5.h3 Bd7 6.Nc3 Nf6 7.Bc4 d5 8.Bb3 e6 9.0-0 Bd6 10.d4; 5.Bd3 Nf6 6.Nc3 g6 7.h3 Bd7 8.Bb2 Bg7 9.Ne4 0-0 10.Nf6; 5.Bc4 Nf6 6.Nc3 d5 7.Be2 e6 8.h3 Bf5 9.Nd4 Bd6 10.0-0) 5...Nf6 6.Be2 g6 7.0-0 Bg7 8.Ng5 Bd7 9.Bb2 0-0 10.d4; E) 4...Nf6 5.Bb2 (5.Nc3 g6 6.Bb2 Bg7 7.Bc4 0-0 8.0-0 d5 9.Bd3 Qd6 10.Na4; 5.Bd3 g6 6.Nc3 Bg7 7.Bb2 Bd7 8.0-0 0-0 9.Ne4 Ne4 10.Bg7) 5...c5 6.b5 Nc7 7.Bd3 g6 8.0-0 Bg7 9.c4 a6 10.b6.

4.Ba3 Qb6 5.b5 (5.Nc3 Nb4 6.Rb1 a5 7.Bb2 Nf6 8.a3 Na6 9.Na4 Qc7 10.Bf6; 5.Be2 Nf6 6.Nc3 Nb4 7.Rb1 a5 8.0-0 h5 9.Bb2 Bf5 10.Nd4; 5.Bd3 Nb4 6.Bb4 Qb4 7.Nc3 Nf6 8.Rb1 Qc5 9.0-0 g6 10.Nd4) 5...cb5 6.Nc3 b4 7.Rb1 Qa5 8.Ba6 bc3 9.Bb5 Kd8 10.Qc1.

4.Ba6 ba6 5.Nc3 (5.0-0 Nf6 6.Nc3 Rb8 7.Rb1 c5 8.Ba3 cb4 9.Bb4 a5 10.Ba3; 5.Qe2 Nf6 6.Nc3 Qb6 7.0-0 g6 8.e4 Bg7 9.e5 de5 10.Ne5; 5.a3 Nf6 6.0-0 g6 7.Nc3 Bg7 8.d4 0-0 9.Qd3 Bf5 10.Qa6; 5.Ba3 a5 6.Nc3 ab4 7.Bb4 Nf6 8.Rb1 c5 9.Ba3 Qa5 10.Bc1) 5...Nf6 6.0-0 a5 7.a3 Rb8 8.Qe2 d5 9.Ne5 Qc7 10.f4.

4.b5 A) 4...Nb4 5.c3 (5.a3 Nd5 6.c4 Nb6 7.Nc3 Nf6 8.bc6 bc6 9.Be2 g6 10.0-0; 5.bc6 Nc6 6.Nc3 Nf6 7.Bb2 g6 8.Bd3 Bg7 9.Nd5 0-0 10.Nf6; 5.Bb2 Nf6 6.c3 Nbd5 7.c4 Nb6 8.Nc3 cb5 9.cb5 Bd7 10.Rc1; 5.Ba3 c5 6.c3 Nd5 7.c4 Nb4 8.Bb2 Bf5 9.d3 Qb6 10.Nc3; 5.e4 d5 6.a3 de4 7.ab4 ef3 8.Qf3 Qd4 9.Nc3 Bd7 10.Qe3) 5...Nd5 6.c4 Nb6 7.Nc3 Nf6 8.bc6 bc6 9.Be2 g6 10.0-0; B) 4...Nc7 5.bc6 (5.Nc3 cb5 6.Nb5 Nf6 7.Bb2 Bd7 8.Nc7 Qc7 9.Bd3 e5 10.0-0; 5.a4 Nf6 6.Bb2 Ncd5 7.Be2 Ne4 8.c4 Ndf6 9.0-0 a6 10.Nc3) 5...bc6 6.Nc3 Nf6 7.Rb1 Ncd5 8.Bd3 Nc3 9.dc3 e5 10.e4; C) 4...Nc5 5.Nc3 (5.bc6 bc6 6.Nc3 Nf6 7.Rb1 Bg4 8.h3 Bd7 9.Ba3 Rb8 10.Bc5; 5.Ba3 Ne4 6.Nc3 Nc3 7.dc3 Nf6 8.bc6 bc6 9.Bc4 Qc7 10.0-0; 5.Be2 Nf6 6.Nc3 cb5 7.Bb5 Bd7 8.0-0 Bb5 9.Nb5 Qa5 10.c4; 5.Bb2 Na4 6.Qc1 Nf6 7.Nc3 Nb2 8.Qb2 g6 9.bc6 bc6 10.Rb1; 5.h3 Nf6 6.Nc3 Bd7 7.Rb1 g6 8.bc6 Bc6 9.Nd4 Bd7 10.Bc4) 5...Nf6 6.Ba3 Bg4 7.h3 Bd7 8.Bc5 dc5 9.Ne5 e6 10.bc6.

4.Bb2 A) 4...a5 5.b5 Ngf6 6.Nc3 Nc5 7.Be2 a4 8.a3 cb5 9.0-0 Bd7 10.Bb5; B) 4...Qb6 5.a3 (5.Bc3 Ngf6 6.Na3 Nd5 7.Be2 Nc3 8.dc3 d5 9.0-0 a5 10.b5) 5...a5 6.Bd4 Qc7 7.Bd3 Ngf6 8.Bf6 Nf6 9.Nc3 e5 10.e4; C) 4...Nb6 5.Nc3 Nf6 6.Bd3 d5 7.0-0 Qd6 8.b5 e5 9.bc6 bc6 10.Be2; D) 4...h6 5.Nc3 (5.a3 Ngf6 6.Bd3 e5 7.Nc3 d5 8.e4 Be7 9.0-0 0-0 10.Re1; 5.Be2 Ngf6 6.Nc3 Ne5 7.b5 Nf3 8.Bf3 Qb6 9.bc6 bc6 10.Rb1) 5...Ngf6 6.Bd3 Ne5 7.Ne5 de5 8.0-0 Qd6 9.b5 Bd7 10.Qf3; E) 4...Ngf6 5.Nc3 (5.b5 g6 6.Nc3 Bg7 7.bc6 bc6 8.Bc4 Qc7 9.Rb1 d5 10.Be2; 5.a3 g6 6.Bd3 Bg7 7.0-0 0-0 8.h3 Nb6 9.Nc3 Bd7 10.Qe2; 5.d4 d5 6.Nc3 e6 7.a3 a5 8.b5 Bd6 9.Bd3 0-0 10.bc6; 5.Be2 Qb6 6.Bc3 Ne4 7.0-0 Ndf6 8.a3 Bg4 9.Bf6 gf6 10.d3; 5.Bd3 a5 6.b5 Nc5 7.Nc3 Nd3 8.cd3 a4 9.bc6 bc6 10.Rb1) 5...g6 6.d4 Bg7 7.Bd3 0-0 8.0-0 Nb6 9.e4 Nh5 10.Qd2.

4.Nc3 A) 4...a5 5.b5 Ngf6 6.bc6 bc6 7.Rb1 Qc7 8.d4 Rb8 9.Rb8 Nb8 10.Bd3; B) 4...g6 5.Bd3 (5.g4 Ne5 6.Ne5 de5 7.Qf3 Nf6 8.g5 Nd5 9.Nd5 Qd5 10.Qd5; 5.d4 Ngf6 6.Bd3 Bg7 7.0-0 0-0 8.e4 e5 9.Rb1 ed4 10.Nd4; 5.b5 Ngf6 6.bc6 bc6 7.Rb1 Bg7 8.Ba3 0-0 9.Be2 Nd5 10.Nd5; 5.Rb1 Ngf6 6.d4 Bg7 7.Bd3 Nd5 8.Bd2 0-0 9.Ne2 e5 10.e4; 5.Be2 Ngf6 6.0-0 Bg7 7.d4 d5 8.a4 0-0 9.a5 Re8 10.Bb2) 5...Bg7 6.Bb2 Ngf6 7.Qe2 a5 8.b5 Nc5 9.0-0 0-0 10.Rab1; C) 4...Ngf6 5.b5 (5.Rb1 g6 6.b5 cb5 7.Bb5 Bg7 8.0-0 0-0 9.Ba3 Qc7 10.Qe2; 5.Ba3 g6 6.Rb1 Bg7 7.b5 cb5 8.Bb5 0-0 9.0-0 a6 10.Be2; 5.Bb2 g6 6.d4 Bg7 7.Bd3 0-0 8.0-0 Nb6 9.e4 Nh5 10.g3; 5.Be2 g6 6.0-0 Bg7 7.d4 d5 8.Bd2 0-0 9.Bd3 a5 10.b5) 5...Qc7 6.Be2 Nc5 7.0-0 g6 8.Nd4 Bg7 9.bc6 bc6 10.Nc6.

4.d4 A) 4...d5 5.Nc3 (5.Nbd2 Ngf6 6.c4 Qc7 7.Bd3 e5 8.cd5 Nd5 9.0-0 Bb4 10.Bb2; 5.Bd3 e6 6.Ba3 Ngf6 7.0-0 Be7 8.c3 a5 9.b5 0-0 10.h3; 5.Bd2 Ngf6 6.Bd3 e6 7.0-0 Bd6 8.Nc3 0-0 9.a3 e5 10.Ne5; 5.c4 Ngf6 6.Nc3 a5 7.b5 Ne4 8.Bb2 Ndf6 9.Ne5 cb5 10.Ne4 ; 5.a3 Ngf6 6.Nc3 e6 7.Bd3 a5 8.b5 c5 9.0-0 Bd6 10.a4) 5...e6 6.Rb1 Ngf6 7.Bd3 Bd6 8.0-0 Qb6 9.Bd2 0-0 10.e4; B) 4...e6 5.c4 (5.Nc3 d5 6.Rb1 Ngf6 7.Bd3 a5 8.b5 Bb4 9.Bb2 c5 10.0-0; 5.Bd3 d5 6.Ba3 Ngf6 7.0-0 Be7 8.c4 dc4 9.Bc4 0-0 10.Nc3; 5.Ba3 Ngf6 6.Bd3 Be7 7.0-0 d5 8.c4 dc4 9.Bc4 0-0 10.Nc3) 5...d5 6.c5 Ngf6 7.Nc3 Ne4 8.Qc2 Nc3 9.Qc3 a5 10.b5; C) 4...Nb6 5.Bd3 (5.Nc3 Nf6 6.Bd3 a5 7.b5 Nbd5 8.Nd5 cd5 9.0-0 Bd7 10.Bb2) 5...Nf6 6.0-0 g6 7.Nc3 Bg7 8.e4 0-0 9.h3 a5 10.b5; D) 4...g6 5.Bd2 (5.Nc3 Ngf6 6.Bd3 Bg7 7.0-0 0-0 8.a3 d5 9.Qe2 Re8 10.e4; 5.Bd3 Bg7 6.Bd2 Ngf6 7.0-0 0-0 8.c4 Qc7 9.Nc3 Nb6 10.Qe2; 5.Be2 Ngf6 6.Nc3 Bg7 7.0-0 d5 8.a4 0-0 9.a5 Re8 10.Bb2; 5.Bb2 Ngf6 6.Nc3 Bg7 7.Bd3 0-0 8.0-0 Nd5 9.Nd5 cd5 10.c4; 5.e4 d5 6.e5 Nh6 7.Nc3 Bg7 8.Bd3 0-0 9.h4 Ng4 10.0-0) 5...Ngf6 6.Bd3 Bg7 7.Nc3 0-0 8.0-0 Re8 9.Ng5 h6 10.Nf3; E) 4...Ngf6 5.Bd3 (5.Nc3 d5 6.Bd3 e6 7.Rb1 Qc7 8.0-0 a5 9.b5 Be7 10.bc6; 5.Bd2 e5 6.Nc3 e4 7.Nh4 Nb6 8.g3 d5 9.a4 g5 10.Ng2; 5.Bb2 d5 6.Nc3 e6 7.a3 a5 8.b5 Bd6 9.bc6 bc6 10.Bd3) 5...e6 6.0-0 d5 7.Ba3 Be7 8.Qc1 0-0 9.Nc3 e5 10.de5.

4.Be2 A) 4...Ngf6 5.0-0 (5.Nc3 g6 6.0-0 Bg7 7.d4 d5 8.Bb2 0-0 9.a4 Nb6 10.a5) 5...g6 6.d4 a5 7.b5 Bg7 8.bc6 bc6 9.Nc3 Rb8 10.Bd2; B) 4...g6 5.Nc3 (5.0-0 Ngf6 6.d4 Bg7 7.Nc3 d5 8.h3 0-0 9.Bd2 Nb6 10.Bd3; 5.d4 Ngf6 6.Nc3 d5 7.0-0 Bg7 8.Ba3 0-0 9.Qd2 Nb6 10.Ne5; 5.Bb2 Ngf6 6.Nc3 Bg7 7.0-0 0-0 8.h3 a5 9.a3 Qc7 10.Bd3; 5.b5 Ngf6 6.bc6 bc6 7.Nc3 Rb8 8.0-0 Bg7 9.d4 0-0 10.Bd2; 5.h3 Ngf6 6.Nc3 Bg7 7.0-0 0-0 8.Bb2 a5 9.b5 Nc5 10.d4) 5...Ngf6 6.0-0 Bg7 7.d4 d5 8.Qd2 0-0 9.a4 Nb6 10.Ne5; C) 4...Ne5 5.Nc3 (5.Ne5 de5 6.Na3 Be6 7.Nc4 Bc4 8.Bc4 Nf6 9.Bb2 Qd6 10.a3; 5.0-0 Nf3 6.Bf3 Nf6 7.Nc3 d5 8.Rb1 Qc7 9.b5 e5 10.bc6; 5.Nd4 g5 6.Nc3 Nf6 7.0-0 Bd7 8.a3 Qc7 9.Bb2 g4 10.Nb3; 5.h3 Nf6 6.Nc3 Nf3 7.Bf3 g6 8.b5 Bd7 9.0-0 Bg7 10.Rb1) 5...Nf6 6.Ne5 de5 7.0-0 h5 8.b5 h4 9.bc6 bc6 10.Bf3; D) 4...a5 5.b5 Ngf6 6.Nc3 Nc5 7.0-0 Bd7 8.Bb2 a4 9.Rb1 a3 10.Bc1; E) 4...Qb6 5.c3 (5.a3 a5 6.Nc3 ab4 7.Rb1 Ngf6 8.0-0 c5 9.ab4 cb4 10.Nb5; 5.0-0 Ngf6 6.d4 Ne4 7.Qd3 Ndf6 8.Nbd2 d5 9.Ne5 Qb4 10.Ne4; 5.d4 Ngf6 6.0-0 d5 7.Nc3 Qb4 8.Qd3 e6 9.Rb1 Qa5 10.Bd2) 5...a5 6.b5 Ngf6 7.Na3 Nc5 8.Nc4 Qc7 9.b6 Qd8 10.Ba3.

4.Ba3 A) 4...g6 5.Bd3 (5.Nc3 Bg7 6.d4 b5 7.Bd3 a5 8.0-0 Na6 9.Qb1 0-0 10.h3; 5.d4 Bg7 6.Bd3 a5 7.b5 cb5 8.Bb5 Bd7 9.c4 Bb5 10.cb5; 5.Bc4 Bg7 6.Nc3 0-0 7.0-0 Nbd7 8.Rb1 Nb6 9.Bd3 Nbd5 10.Ne4; 5.Be2 Bg7 6.Nc3 0-0 7.0-0 Nd5 8.Nd4 e5 9.Nf3 Nd7 10.b5; 5.h3 Bg7 6.Nc3 Nbd7 7.Bd3 Nd5 8.Nd5 cd5 9.Rb1 a5 10.Bb2) 5...Nbd7 6.Nc3 Bg7 7.0-0 0-0 8.Rb1 Ne5 9.Ne5 de5 10.b5; B) 4...Nbd7 5.Bd3 (5.Nc3 g6 6.d4 Bg7 7.Bd3 0-0 8.0-0 Nb6 9.h3 Nfd5 10.Qd2; 5.h3 g6 6.Nc3 Bg7 7.Be2 0-0 8.0-0 Nd5 9.Nd5 cd5 10.Rb1; 5.Be2 g6 6.Nc3 Bg7 7.0-0 0-0 8.Qb1 Nd5 9.Bb2 Nb4 10.Ne4; 5.g3 Ne5 6.Nc3 g6 7.Ne5 de5 8.b5 Qa5 9.Qc1 Nd5 10.Qb2; 5.h4 b5 6.c4 a6 7.Qc2 Nb6 8.c5 Nbd5 9.Nc3 dc5 10.bc5) 5...g6 6.0-0 Bg7 7.Nc3 0-0 8.Rb1 Ne5 9.Ne5 de5 10.b5; C) 4...Bd7 5.c4 (5.Nc3 b5 6.Be2 a5 7.Qb1 ab4 8.Qb4 c5 9.Qb3 b4 10.Ng5) 5...Na6 6.Nc3 c5 7.bc5 Nc5 8.Bc5 dc5 9.Bd3 e6 10.Rb1.

4.Nc3 A) 4...g6 5.Bb2 (5.Bd3 Bg7 6.Bb2 0-0 7.0-0 Nbd7 8.Na4 Nb6 9.Nc3 Nfd5 10.a3; 5.a3 Nbd7 6.Be2 Bg7 7.0-0 0-0 8.d4 Nd5 9.Nd5 cd5 10.c4; 5.Bc4 Bg7 6.0-0 0-0 7.Bb2 Nbd7 8.h3 Nb6 9.Bd3 Nfd5 10.Nd5; 5.Rb1 Bg7 6.Be2 0-0 7.0-0 Na6 8.Ng5 Nd5 9.e4 Bc3 10.ed5; 5.Be2 Bg7 6.0-0 0-0 7.Bb2 Bd7 8.Ng5 Na6 9.a3 c5 10.b5) 5...Bg7 6.Bc4 0-0 7.0-0 Nbd7 8.a3 Nb6 9.Bd3 Bd7 10.h3; B) 4...Na6 5.a3 (5.Ba3 g6 6.Bc4 Bg7 7.0-0 0-0 8.Qe2 Nc7 9.Bb2 Bd7 10.a3; 5.Rb1 Nc7 6.Be2 Ncd5 7.0-0 Bd7 8.Nd5 cd5 9.Bb2 Rc8 10.Rc1; 5.Ba6 ba6 6.0-0 a5 7.a3 Rb8 8.Qe2 ab4 9.ab4 Rb4 10.Ra7) 5...g6 6.Bd3 Bg7 7.Bb2 0-0 8.0-0 Bd7 9.Qe2 Nc7 10.h3; C) 4...Nd5 5.Nd5 (5.Ba3 Nc3 6.dc3 Nd7 7.Be2 g6 8.Qd4 e5 9.Qd3 Nf6 10.e4; 5.Bc4 Na6 6.Bd5 cd5 7.Ba3 Nc7 8.Qe2 Bd7 9.Qd3 g6 10.Nd5; 5.a3 Nc3 6.dc3 Nd7 7.Bb2 g6 8.c4 Nf6 9.Bd3 Bg7 10.0-0; 5.e4 Nc3 6.dc3 a5 7.Be2 ab4 8.cb4 Nd7 9.0-0 Nf6 10.Qd3; 5.Bb2 Nb4 6.a3 Nd5 7.Nd5 cd5 8.c4 dc4 9.Bc4 d5 10.Bd3) 5...cd5 6.c4 dc4 7.Bc4 d5 8.Bd3 Nc6 9.Bb2 Nb4 10.Qa4; D) 4...Bd7 5.Ba3 (5.Bb2 Na6 6.a3 g6 7.Ne4 e5 8.Bd3 Ne4 9.Be4 Bg7 10.0-0; 5.Rb1 Na6 6.Bc4 g6 7.0-0 Bg7 8.b5 cb5 9.Bb5 Nc5 10.Ba3; 5.Bd3 Na6 6.Ba3 g6 7.0-0 Bg7 8.Ng5 0-0 9.Qf3 Nc7 10.Bb2; 5.Be2 Na6 6.0-0 Nb4 7.Rb1 c5 8.a3 Nbd5 9.Rb7 Bc6 10.Bb5; 5.Bc4 b5 6.Bb3 a5 7.ba5 Qa5 8.0-0 b4 9.Ne2 Na6 10.Bb2) 5...b5 6.Ng5 a5 7.Nce4 ab4 8.Bb2 Na6 9.a4 ba3 10.Ra3; E) 4...Nbd7 5.Be2 (5.Rb1 Nd5 6.Nd5 cd5 7.c4 dc4 8.Bc4 Nb6 9.Bd3 Be6 10.Bb2; 5.h3 g6 6.Bb2 Bg7 7.Be2 0-0 8.0-0 Qb6 9.a3 a5 10.Na4; 5.Ba3 g6 6.h3 Bg7 7.Bd3 Nd5 8.Nd5 cd5 9.Rb1 a5 10.Bb2; 5.Bb2 a5 6.b5 Nc5 7.Be2 a4 8.a3 Bd7 9.0-0 h6 10.h3) 5...g6 6.0-0 Bg7 7.d4 0-0 8.e4 Nb6 9.Bd3 a5 10.b5.

4.c4 e5 (4...a5 5.b5 cb5 6.cb5 Nbd7 7.Nc3 Ne5 8.Be2 Bf5 9.0-0 Rc8 10.Nd4; 4...Nbd7 5.Nc3 (5.Ba3 Ne5 6.Nc3 g6 7.Be2 Nf3 8.Bf3 Bg7 9.d4 0-0 10.0-0) 5...a5 6.b5 Nc5 7.Be2 h5 8.bc6 bc6 9.Qc2 Rb8 10.0-0) 5.Nc3 Be7 (5...e4 6.Nd4 c5 7.bc5 dc5 8.Nde2 Bd6 9.Ng3 Be5 10.Be2) 6.Be2 (6.Bd3 0-0 7.0-0 h6 8.Rb1 Be6 9.Ba3 Nbd7 10.b5) 6...0-0 (6...Bf5 7.0-0 0-0 8.d3 a5 9.b5 Nbd7 10.e4) 7.0-0 (7.Qc2 h6 8.0-0 Be6 9.d4 Nbd7 10.Bd2) 7...Nbd7 (7...e4 8.Nd4 c5 9.bc5 dc5 10.Nb3) 8.a3 (8.d4 ed4 9.ed4 d5 10.b5) 8...Re8 (8...Nb6 9.Bb2 Bf5 10.d4) 9.d4 Bf8 (9...h6 10.Bb2) 10.Bb2 (10.d5+=) 10...g6 11.d5 c5 12.e4 Bh6 13.Bc1 Bc1 14.Qc1 Kg7 15.h3 b6 16.Qe3 h6 17.Nh2 Qe7 18.b5 Nf8 19.a4 N8h7 (19...a6 20.Nf3+=) 20.a5+/– Rb8 21.ab6 ab6 22.Ra3 Ng8 23.Rfa1 f5 24.ef5 gf5 25.Bh5 Rf8 26.Qg3 Kh8 27.f4 Rb7 28.Ra8 (28.fe5 f4 29.Qd3 Qe5+/–) 28...Ngf6 29.Be2 Rg8 30.Qe3 (30.Qf2 ef4 31.Qf4 Ne4 32.Ne4 Qe4 33.Qe4 fe4+/–) 30...Qg7+= 31.Bf1 ef4 32.Qf4 Ng5 33.Qh4 ½–½. Jahr,Ulrich – Krol,Slawomir (2010), DMR KPZSzach, 2009.

3.a3 Qf6 4.Bb2= d5 5.f4 Nd7 6.Nf3 Bd6 7.c4 (7.Be2 Qe7=) 7...Qe6 (7...Ne7!?=) 8.cd5+= Qd5 9.Nc3 Qe6 10.Ne4 f6 (10...Bc7 11.Qc2+=) 11.Bc4!+/– Qe7 (11...Qc4 12.Nd6 Double attack (12.Nd6 Deflection; 12.Nd6 Decoy)) 12.Nd6 Qd6 13.fe5 Ne5 (13...fe5 14.Ng5 Nh6 15.Qh5 Qg6 16.Qg6 hg6 17.0-0+–) 14.Ne5 fe5 15.Qh5 Kd8 16.0-0 (better is 16.Qe5 Qe5 17.Be5+–) 16...Kc7?? (better is 16...Nf6 17.Qg5 Qe7 18.Be5 Rf8+–) 17.Be5 Qe5 18.Qe5 Kb6 (18...Kd7 19.Rf7 Kd8 20.Qd6 Ke8 21.Rf8) 19.Qa5# 1–0. marre – vjecta, internet, 2010.

3.Bb2 Bd6 4.Nf3 (4.Qh5 g6 5.Qf3 Bc7= (5...Bb4? 6.Be5 f6 7.Bb8+–)) 4...Nf6 (4...f6 5.a3=) 5.Ne5+= Be5 (5...Bb4 6.Ng4+=) 6.Be5+/– 0-0 (6...d6 7.Bd4+/–) 7.Qf3 d6 (7...Ne8 8.Bd4+/–) 8.Bf6+– Qf6 9.Qf6 gf6 10.Nc3 d5 (10...Bf5 11.d3+–) 11.Bd3 (11.d4 Bf5+–) 11...Nd7 12.0-0 (12.b5 a6 13.bc6 bc6+–) 12...Ne5 13.Be2 Bf5 14.f4 Nc4 15.e4! Nd2 (15...de4 16.d3 Double attack (16.Bc4 Deflection; 16.d3 Decoy); 15...Be4 16.d3 Double attack (16.d3 Decoy)) 16.ef5 Nf1 17.Kf1 Rae8 (17...b5 18.a4 a5 19.Rb1 ba4 20.b5+–) 18.Bd3 Re7 (18...Kg7 19.a4+–) 19.Re1 Rfe8 20.Re7 Re7 21.Kf2 h5 (21...Kf8 22.g4+–) 22.b5 (22.Ne2 h4+–) 22...d4 (22...Kg7 23.bc6 bc6 24.g3+–) 23.Ne4 (23.Ne2 cb5 24.Bb5 a6+–) 23...cb5 (23...Kg7 24.Nd6+–) 24.Nf6 Kg7 (24...Kh8 25.Nh5 a6 26.f6+–) 25.Nh5 (25.Bb5 Kf6 26.Bd3 Re3–+) 25...Kf8 (25...Kh8 26.Bb5 a6 27.f6+–) 26.Bb5 a6 27.Bd3 b5 28.Nf6 (28.h4 Rc7+–) 28...Rb7 29.h4 a5 (29...Re7 30.h5 Kg7 31.Ne4+–) 30.h5 Rb6 (30...Rc7+–) 31.Nd7 (31.Nd7 Ke7 32.Nb6+–) 1–0. Wall,Bill – Fercho, internet, 1999.

3.Bb2 Nf6 4.Be5 Bb4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 c6).

3.c3 d5=+ 4.d3 Be6 5.Nf3 f6 (5...Bd6 6.Be2=+) 6.Be2= Bd6 7.Qc2 (7.0-0 a5=) 7...Ne7=+ 8.0-0 0-0 9.e4 Nd7 10.a3 Rc8 (10...a5 11.Qb2=+) 11.c4= b6 12.Bd2 (12.d4 de4 13.Qe4 Bf5=) 12...dc4 (12...d4!?=) 13.dc4+= c5 14.b5 Bf7 (14...Qe8 15.Rd1+=) 15.Rd1 Bb8 (15...Qc7 16.Nc3+/–) 16.g4 (16.Nc3!?+/–) 16...Qc7 17.Nh4 Rfe8 (17...Rfd8 18.Nc3+=) 18.Nc3+= Nf8 (18...Qb7 19.Nd5+=) 19.Nd5 Qb7 20.Nf5 Neg6 (20...Nf5 21.gf5 (21.ef5?! e4=) 21...Bd6 22.a4+=) 21.Bf1 Ne6 22.Bc1 Rcd8 23.Ra2 Ngf8 24.Qc3 Nd4 25.Bg2 Nfe6 26.Qg3 Kh8 27.a4 Rd7 28.Re1 Nf4 29.Re3 (29.Bf1 a6=) 29...a6 30.Bf1 Bd6 (better is 30...Red8!?+=) 31.Nd6+= Rd6 32.Nf4 ef4 33.Qf4 Rde6 34.f3 ab5 35.ab5 (35.cb5?! Re4 36.Re4 Re4 37.fe4 Ba2=) 35...g5 (35...Qe7 36.Rea3+/–) 36.Qg3 Ra8 37.Ra8 Qa8 38.Ra3 Qd8 39.Qf2 Qe7 40.h4 gh4 41.Ra8 Kg7 42.Kh1 Qb7 43.Ra3 Bg6 44.Kg1 (44.Qh4 Nf3 45.Qg3 Be4–/+) 44...Qc7 45.Bb2 (45.Qh4 Kf7+/–) 45...h5 46.Qh4 (46.gh5!? Bh5 47.Bd4 cd4 48.Qh4+/–) 46...Qf4+= 47.Bd4 cd4 48.Ra7 Kf8 49.Qh3 Re5 50.Bg2 (50.Rb7!?+=) 50...d3 51.gh5?? (better is 51.Rd7 Qe3 52.Kh2=) 51...Qe3 52.Kf1 Qe2 (better is 52...Qc1!? 53.Kf2 d2 54.Ra8 Be8 55.Qh1 Qh1 56.Bh1–+) 53.Kg1 Qe1 54.Bf1 Rg5 55.Kh2 Rh5 0–1. Lutz,Herbert – Haeberlein,Guenther, Wuerttemberg–ch B, 2004.

3.d4 ed4 4.ed4 (4.Qd4 d5=) 4...Qe7 (4...Bb4 5.c3 Be7 6.Qg4–/+) 5.Qe2 (5.Be2 Qb4 6.c3 Qa5+=) 5...d5 (5...Qe2 6.Be2 Bb4 7.Bd2 Bd2 8.Nd2–/+) 6.Bd2 (6.a3 Bf5=) 6...Bf5+= 7.c3 h6 (7...Nd7 8.Nf3+=) 8.Nf3= Nd7. Ramerat – ANJI, internet, 2010.

3.Nf3 d5 4.Bd3?? (better is 4.Ne5 Bb4 5.Bb2=) 4...e4–+ (4...Bb4?! 5.Ne5 Qg5 6.Nf3+=) 5.Be2 (5.Bb2 ed3 6.cd3 Nf6–+ (6...Bb4? 7.Bg7 Bf5 8.Bh8+–)) 5...ef3 6.gf3 (6.Bf3 Bb4 7.0-0 Nf6–+) 6...Bd6 (6...Bb4!? 7.Bb2 Nf6 8.Nc3–+) 7.b5 cb5 8.h4 (8.Bb2 Nf6–+) 8...Nc6 (8...a6 9.d4–+) 9.f4 (9.Bb2 Nf6–+) 9...f5 (9...b4!? 10.a3–+) 10.Bb5 Nf6 11.Ba3 a6 12.Bd3 (12.Bd6 Qd6 13.Be2 0-0–+) 12...Ne4 (12...Ba3 13.Na3 Qe7 14.Nb1–+) 13.Rg1 (13.Bd6 Qd6 14.h5–+) 13...Be7 (13...Ba3 14.Na3 0-0 15.h5–+) 14.c4? (better is 14.Rg7 Kf8 15.Be7 Ne7 16.Rg2–+) 14...Ba3–+ (14...Bh4 15.Qh5 g6 16.Rg6 Bf2 17.Kf1 hg6 18.Qh8 Kd7 19.Qg7 Ne7 20.Be4 de4 21.Kf2+=) 15.Na3 Be6 (15...Qh4 16.Be4 de4 17.Rg7–+) 16.Rg7 (16.Qh5 Kf8 17.Rb1 Qd7–+) 16...Bf7 (better is 16...Qh4 17.Be4 fe4–+) 17.f3?? (better is 17.Rf7 Kf7 18.cd5–+) 17...Bg6 (17...Qh4 18.Rg3 Qg3 19.Ke2 Qf2) 18.fe4–/+ Ne7?? (better is 18...Qh4!? 19.Kf1 Qh1 (19...fe4?! 20.Bc2–+) 20.Kf2 Qh2 21.Kf1 fe4–+ (21...de4?! 22.Qb1 Qh1 23.Kf2 Qf3 24.Kg1 ed3 25.Qb7–+)) 19.ef5 (better is 19.h5!? Kf8 20.h6 fe4 21.Bb1=) 19...Nf5= 20.Rg6 (20.Bf5 Qh4 21.Kf1 Bf5 22.cd5 b5=) 20...hg6 (better is 20...Qh4 21.Ke2 hg6 22.Bf5 Qh5 (22...gf5?! 23.Qa4 Kf8 24.Qd7=) 23.Ke1 Qh1 (worse is 23...Qf5 24.Qa4 Kf7 25.Qb4–+) 24.Ke2 Qg2 25.Kd3 dc4 (25...gf5?! 26.Qa4 Ke7 27.Qb4 Ke8 28.Qa4 b5 29.cb5=) 26.Nc4 Qd5 (26...gf5?! 27.Qa4 b5 28.Nd6 Kf8 29.Qd4+=) 27.Kc3 gf5–+) 21.cd5?? (21.Qg4 Qh4 22.Qh4 Rh4 23.cd5 Rh1 24.Bf1+=) 21...Qd5 (21...Qh4 22.Ke2 Qg4 23.Ke1 Qg3 24.Ke2 Rh2 25.Kf1 Qf2) 22.Rb1?? (better is 22.Qa4 b5 23.Be4=) 22...Qd3–+ 23.Rb7?? (23.Qa4 Kf8 24.Rb7 Rh4 25.Qc6–+) 23...Qa3 24.d4 (24.Qc2 Ne7 25.Qb3 Qb3 26.Rb3 Rh4 27.Kd1–+) 24...Qe3 (24...Rh4 25.Qd2 Rh1 26.Ke2 Rh2 27.Kd1 Rd2 28.Kd2 Rc8 29.Re7 Ke7 30.Ke2 Qe3 31.Kf1 Rc1 32.Kg2 Qg3) 25.Kf1 (25.Qe2 Qe2 26.Ke2 Nd4 27.Ke3 Nf5 28.Kf3 Rh4 29.Rb6–+) 25...Qf4 26.Ke1 Rd8 (26...Qh4 27.Kd2 Qd4 28.Kc1 Rc8 29.Rc7 Rc7 30.Kb1 Qd1 31.Kb2 Qd4 32.Kb3 Rh3) 27.Qb1 Qe3 (27...Qh4 28.Ke2 Qh2 29.Ke1 Qg3 30.Kd1 Rh1 31.Kc2 Rh2 32.Kd1 Qg1) 28.Kd1 Rd4 29.Kc2 (29.Qd3 Rd3 30.Kc2 Rd2 31.Kb1 Qe1) 29...Qd2 (29...Rd2 30.Kc1 Qe1) 30.Kb3–+ Qd3 (30...Rhh4 31.Rb8 Kd7 32.Rb7 Kd6 33.Rb6 Kd5 34.Qc2 Rb4 35.Ka3 Rh3 36.Qb3 Rbb3 37.Rb3 Qa5 38.Kb2 Rh2 39.Kc1 Qe1) 31.Kb2 (31.Qd3 Rd3 32.Kc2 Rd8–+) 31...Qb1 (31...Qe2 32.Ka3 Rd3 33.Rb3 Qe7 34.Kb2 Qe5 35.Kc1 Qf4 36.Kb2 Qd4 37.Ka3 Qd6 38.Kb2 Rd2 39.Kc1 Rd1 40.Kb2 Qd4 41.Ka3 Rb1 42.Rb1 Qc5 43.Ka4 Rh4 44.Kb3 Rh3 45.Ka4 Qa3) 32.Kb1 Rhh4 33.Rb8 Kf7 34.Ra8 Kf6 (better is 34...Rd2 35.Ra7 Ke6 36.Rc7 Rb4 37.Kc1–+) 35.Ra6 Kg5 36.Ra5 (36.Rc6 Rb4 37.Kc1 Rh1 38.Kd2 Rb2 39.Kc3 Ra2–+) 36...Rb4 (36...Rh2!? 37.Kc1–+) 37.Kc2 Rbc4 38.Kd3 (38.Kb3 Rce4 39.Rc5 Rh2–+) 38...Rcd4 (38...Rhd4 39.Ke2 Kf4 40.Rf5 gf5 41.a3 Rc2 42.Ke1 Ke3 43.a4 Rc1) 39.Kc3 (39.Kc2 Rh2 40.Kc3 Rh3 41.Kc2 Rg4–+) 39...Rh3 40.Kb2 Rb4 (40...Rd2 41.Kc1 Rf2 42.Rd5–+) 41.Kc2 (41.Kc1 Rh2 42.a3 Rb3–+) 41...Rc4 (41...Rg4!? 42.Rc5–+) 42.Kd1 (42.Kb2–+) 42...Rd3 0–1. jko – alctay (1700), net–chess.com, 2009. (=1.e3 e5 2.b4 c6)

3.Nf3 e4+= 4.Nd4 Bb4 5.c3 (5.a3 Ba5= (5...Bf8 6.Be2 d5 7.0-0 Nf6 8.Bb2) 6.Qg4 Nf6 7.Qg7 Rg8 8.Qh6; 5.Qg4 Nf6 6.Qg7 Rg8 7.Qh6 d5 8.Bb2) 5...Bc5 (5...Bf8 6.c4 Nf6 7.d3 d5 8.cd5) 6.Ba3 (6.d3!? d5 7.Nd2+= (7.Nb3 Be7 8.de4) 7...Nf6 8.Be2; 6.Qg4 Nf6 7.Qg7 Rg8 8.Qh6) 6...Ba3–/+ 7.Na3 Qe7 (7...Nf6 8.Be2–/+ (8.d3 Qe7 9.Qc1–/+); 7...d5 8.Rb1) 8.Nac2 (8.Qb3 d5+=) 8...d5–/+ 9.Be2 (better is 9.c4!?–/+) 9...c5–+ 10.Nb3 Bd7 (10...Nf6 11.0-0–+) 11.0-0 (11.c4 dc4 12.Bc4 Nc6–+) 11...b6 (11...Nf6 12.Qe1–+) 12.d4 (better is 12.c4 dc4 13.Bc4–/+) 12...Qg5 (12...ed3 13.Qd3 (13.Bd3? c4–+) 13...Nf6 14.c4 dc4 15.Qc4–+) 13.Nd2 (better is 13.dc5!? Nf6 14.f3 ef3 15.Rf3=) 13...Bh3–/+ 14.g3 (better is 14.Ne1!? Nf6 15.c4 cd4 16.ed4–/+) 14...Bf1–+ 15.Bf1 (15.Qf1 Nf6 16.Bb5 Nbd7–+) 15...Nf6 16.Bg2 (16.Bb5 Nbd7–+) 16...Nbd7 (16...0-0 17.Qe2–+) 17.Nb3 (17.c4 Rd8–+) 17...c4 18.Nd2 a5 (18...h5 19.h3–+) 19.Na3 0-0 20.Nb5 Rfc8 21.a4 Ne8 (21...Rc6 22.Qe2–+) 22.h4 (22.Rb1 Qh6–+) 22...Qf6 (22...Qg6 23.Bh3 Rd8 24.Rb1–+) 23.Qe2 (better is 23.f3!? Qh6 24.fe4 Qe3 25.Kh2–/+) 23...Nd6 24.Qg4 (24.f3 Nb5 25.ab5 ef3 26.Qf3 Qh6–+) 24...Qe7 (24...Nb5 25.ab5 Qd6 26.Qd1–+) 25.Bh3 (25.Nd6 Qd6 26.Qf4 Qf4 27.ef4 Nf6–+) 25...Nf8 (better is 25...Nf6!? 26.Qd1 Nb5 27.ab5–+) 26.Nd6 Qd6 27.Qd1 (27.f3 Re8–+) 27...Rd8 28.Nb1 Qf6 29.Na3 Ne6 30.Nb5 Rd7 31.Rb1 Rb8 32.Qg4 Rbb7 33.Qe2 Rd8 34.Rf1 Nc7 35.Qb2 (35.Rb1 Nb5 36.Rb5 g6–+) 35...Qe7 36.Nc7 Qc7 (36...Rc7?! 37.Qb6 Rb7 38.Qa5–+) 37.Qb5 g6 38.Rb1 Rd6 39.Qe8 Kg7 40.Qe5 f6 41.Qf4 f5 (41...Rc6 42.Qc7 Rbc7 43.Bg4–+) 42.g4 (42.Qe5 Kf7–+) 42...fg4 43.Bg4 Qe7 44.Qg3 (44.h5 gh5 45.Bh5 Rf6 46.Qg3 Kh8–+) 44...Rf6 (44...b5 45.ab5 Rdb6 46.Kg2–+) 45.Kg2 (45.Qe5 Qe5 46.de5 Rc6–+) 45...Qa3 46.Qe5 Qd6 (better is 46...Qa2 47.Rf1 Rbf7–+) 47.Qe8 (47.Rb5 Re7 48.Qd6 Rd6 49.Rb1–+) 47...h5 48.Bh3 (48.Be2 Re7 49.Qb5–+) 48...Rf8 (48...Re7 49.Qc8 Rf8 50.Qf8 Kf8 51.Rb2–+) 49.Qb5?? (49.Qe5 Qe5 50.de5–+) 49...Qf6 (better is 49...Rf2! 50.Kf2 Qh2 51.Ke1 Rf7–+) 50.Rb2 Qf3 (50...Rbf7!? 51.Qd5 Qh4 52.Qe5 Kh6 53.Qg3–+) 51.Kh2 (51.Kh2 Qf7 52.Kg2–+). leighcastle – Kevin the fruitbat, ChessWorld.net, 2009.

3.Qh5 Qf6 4.a3 (4.Bb2 d6= (worse is 4...Bb4 5.Be5 Qg6 6.Qg6 hg6 7.Bg7+/– Rh7 8.Bd4 d5) 5.f4 Nd7 6.Nf3 Qe7 7.Qg5 Qg5 8.Ng5 ef4) 4...d6 (4...d5 5.Bb2 Bf5 6.c4 Bd6 7.cd5 cd5 8.f4 a6) 5.Bb2 (5.Nc3 d5 6.Nf3 Bd6 7.e4 d4 8.Na4 g6; 5.e4 Be7 (5...Be6 6.Nc3 Nd7 7.Be2 d5 8.ed5 cd5) 6.Nc3 Be6 7.Be2 Nd7 8.Bg4 d5) 5...Nh6 (5...Qe7 6.d4 Nf6 7.Qh4 Bf5 8.de5 de5) 6.Qd1 (6.Be2 Bf5 7.d4 e4 8.g4 Bg6) 6...Be6 (6...Be7 7.f4 Bf5 8.Nf3 Nd7) 7.e4 (7.Nf3 Nd7 8.c4 Be7) 7...Be7 (7...Qg6 8.Nc3= Be7; 7...d5 8.ed5 cd5) 8.Qf3 (8.d4 Qg6 9.Nd2 ed4 10.Bd4 Bf6 11.Bf6 Qf6=) 8...0-0 (8...Qg6 9.d4+=; 8...Nd7+=) 9.Qf6= Bf6 10.h3 (10.f4 Bg4=) 10...Nd7 11.Be2 c5 (11...a5 12.Nc3+=) 12.bc5 (12.Nc3 Be7=) 12...Nc5+= (worse is 12...dc5 13.Nf3+=) 13.d3 (13.Nc3 Be7+=) 13...d5 (13...Rac8 14.Nc3+=) 14.Nf3 d4 (14...de4 15.de4 Ne4 16.0-0+=) 15.0-0 (better is 15.g4!? g5 16.Bc1+=) 15...Rac8 16.Bd1 (16.Bc1 Na4 17.Bh6 gh6+=) 16...Kh8 17.Re1 (17.Ne1 Be7+=) 17...Na4 18.Bd4? (better is 18.Bc1+=) 18...ed4–+ 19.Nd4?? (better is 19.e5 Bd8 20.Nd4–+) 19...Bd4 20.c3 Nc3 21.Bf3 1–0. novice1234 – Kevin the fruitbat, ChessWorld.net, 2009.

4.b5 d5 5.d4 e4 6.c4 =.

4.b5 d5 5.Nf3 e4 Black fights for the Initiative 6.Nd4 (6.Ne5 Nh6 7.bc6 bc6–/+ (7...Nc6?! 8.Bb2=)) 6...c5 7.Nb3? (better 7.Ne2=+) 7...a4–+ 8.f4 (8.Nc5 Bc5 9.Bb2 Qg5–+) 8...ab3 9.cb3 f5 (9...Nf6 10.Be2–+) 10.Be2 Qf6 11.Nc3 Be6 12.Bb2 d4 13.ed4 cd4 14.Na4 Qd8 (14...Nd7!? 15.Rc1–+) 15.0-0 Nf6 16.Bc4 (16.d3–+) 16...Bc4 17.bc4 Be7 (better 17...Qa5 18.Bd4 Qa4 19.Qe2–+) 18.c5 0-0 (18...Ra5!? 19.d3 Qd7 20.c6 bc6 21.de4–+) 19.Nb6 Ra5 20.a4? (20.Qb3 Kh8 21.Nc4–+) 20...Bc5 21.Nc4 Ra8 22.Ne5 (22.Ba3 Ba3 23.Ra3 Nd5–+) 22...Nbd7 (better 22...Qd5!? 23.Ba3–+) 23.Qb3 Kh8 24.Nf7 Rf7 25.Qf7 b6 26.Rac1?! (26.Rfc1 Qg8 27.Qg8 Kg8–+) 26...Rc8 (26...Ra4!? 27.Qe6–+) 27.h4 (27.Kh1 Nf8–+) 27...Rc7 28.Qb3 (28.Qe6 Nh5 29.Qf5 Ng3–+) 28...Qe7 (28...d3 29.Kh2 Ng4 30.Kh3–+) 29.Kh1 Ng4 30.Qd5 (30.Qg3 d3 31.h5–+) 30...Qh4 31.Kg1 Qh2 0–1. Markzela (1820) – TitusMcLovin (2210), lichess.org, 2020.

4.b5 Qf6 5.a4 (5.Bb2 d5=) 5...e4 (5...d5 6.Bb2=) 6.c3 (6.Nc3 d5=) 6...Nh6 (6...d5 7.Ba3+=) 7.Ne2 (7.d3 d5=) 7...Bd6 (7...d5 8.d3+=) 8.d3= Ng4 (8...ed3!? 9.Qd3 Ng4=) 9.Nf4+= Bf4 (9...Nf2 10.Kf2 g5 11.Nd2 gf4 12.Ne4 fe3 13.Kg1+=) 10.ef4 (10.Qg4!? Bd6 11.Qe4 Be7 12.Ba3+/–) 10...d5= 11.Be2 (11.de4 de4 12.h3 Nh6+=) 11...h5 (11...Qg6 12.de4 de4 13.0-0=) 12.Bg4 (better is 12.de4 de4 13.h3+/–) 12...Bg4+= 13.Qb3 (13.Qd2!?+=) 13...ed3–/+ 14.0-0 Be2 (14...0-0 15.Re1–/+) 15.Re1 (15.bc6 Qc6 (15...bc6? 16.Qb7 Bf1 17.Qa8+–; 15...Nc6?! 16.Re1–/+; 15...Bf1?! 16.cb7 Ra6 17.Kf1+=) 16.Re1 0-0+=) 15...0-0–/+ 16.f3 (16.Be3 h4–/+) 16...Qg6 17.Na3 (17.Nd2 h4–/+) 17...Bf3 18.Kf2?? (better is 18.Ra2–+) 18...Qg2 19.Ke3 Be2 (better is 19...Re8 20.Kd3 Nd7 21.Re8 Re8–+) 20.Bd2 Qf3 (20...Re8 21.Kd4 Qf2 22.Be3 Qe3) 21.Kd4 Nd7 (21...Qe4 22.Kc5 Nd7 23.Kd6 Qe6 24.Kc7 Rab8 25.Re2 Rfc8) 22.c4–+ Qe4 (22...Nc5 23.Qa2 Na4 24.Re2 Rfe8 25.Re6 Re6 26.bc6 Qe4) 23.Kc3 Nc5 24.Qb1 (24.Qa2 Na4 25.Kb3 dc4 26.Nc4 cb5 27.Na5 b6–+) 24...Na4 (24...dc4 25.Nc4 Rfd8 26.Be3–+) 25.Kb3 Nc5 (better is 25...dc4 26.Ka4 c3 27.Kb3 cd2 28.Rd1–+) 26.Ka2 dc4 27.Qc1 (27.Rc1 Qd5 28.Bc3 Na4 29.bc6 Bd1 30.Qb7 Rfb8–+) 27...Nb3 28.Qc3 Na1 (28...cb5 29.Rg1 f6 30.Kb1–+) 29.Ka1 cb5 30.Nb5 Qc6 31.Na3 (31.Nd4 Qa4 32.Kb2 Rfd8–+) 31...Qf6 (better is 31...b5 32.Rg1 Bg4 33.Qb2–+) 32.Qf6 gf6 33.Nc4 h4 (33...b5!? 34.Ne3–+) 34.Nd6 (34.Rb1 Rac8 35.Na5 Rc2–+) 34...b6 35.Ne4 (35.Nf5 Rfe8–+) 35...a4 (better is 35...Rfd8 36.Rb1 Bf3 37.Nf6 Kg7 38.Bc3–+) 36.Nf6 Kg7 37.Nd7 b5 (37...Rfd8 38.Rg1 Kh7 39.Nf6 Kh8 40.Bc3–+) 38.Nf8 (38.Rg1 Kh7 39.f5 Rfd8 40.Nf6 Kh8–+) 38...Kf8 39.Kb2 Rc8 (better is 39...Ke7–+) 40.Ka3 (40.Rc1 Rb8 41.Rc6–+) 40...Rc2 41.Bb4 Kg7 42.Rg1 Kf6 43.Rg5 d2 44.Bd2 Rd2 45.Rb5 0–1. Eries – maftei, ChessWorld.net, 2009.

(--> 1.b4 e5 2.a3 d5 3.e3 c6).

4.Bb2 Bd6 5.c4 Nf6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6).

4.Bb2 Bd6 5.Nf3 Qe7 6.c4 Nf6 (---> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6 6.Nf3 Qe7).

4.Bb2 f6 5.Nf3 (---> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6 5.Nf3).

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 c6).

4.Bb2 Bd6 5.Nf3 Qe7 6.d4 e4 7.Nfd2 0-0 8.c4 Bc7 9.c5 Re8 10.Nc3 d5 11.cd6 Bd6 12.Be2 Nbd7 13.g4 Nb6 (13...a5 14.b5+=) 14.g5 Nfd5 15.Nce4 Bc7 16.h4 (16.Qc2 a5 17.b5 Bd7+=) 16...Bf5 (16...a5 17.ba5 Ra5 18.Bd3=) 17.Bd3+= Rad8 18.Qf3 Qd7?? (18...Na4 19.Qf5 Nb2+–) 19.Nf6!!+– gf6 (19...Nf6 20.Bf5 Discovered attack; 19...gf6 20.Bf5 Discovered attack) 20.Bf5 (20.Qf5?! Qf5 21.Bf5 Na4+–) 20...Qe7 (20...Re6 21.Ne4 Na4 22.gf6+– (22.Be6?! fe6 23.0-0-0 Nb2 24.Kb2 f5 25.Nf6 Nf6 26.gf6 Kh8+–)) 21.Rg1 (better 21.Qh5 Qe3 22.fe3 Bg3 23.Kd1 Ne3 24.Kc1 Nf5 25.Qg4+–) 21...fg5 22.Rg5 Kh8 23.Bh7 Ne3 (23...f6 24.Rh5 Nf4 25.Bg6 Nh5 26.Qh5 Kg8+–) 24.d5 (24.Qe3?! Kh7 25.0-0-0 Qe3 26.fe3 Re3=; worse 24.fe3 Qe3 25.Qe3 Re3 26.Kf2 Rde8+–) 24...f6 (24...Be5 25.Be5 Qe5 26.Re5 Re5 27.fe3 Nd5+–) 25.Bf6 (25.Qe3?! Kh7 26.Rh5 Kg7=) 25...Kh7 (25...Qg7 26.Bg7 Kh7 27.Qh5 Kg8 28.Bh6 Kh7 29.Bf8) 26.Qh5 1–0. FeegLood (2745) – smurf42 (2580), lichess.org, 2015.

4.Bb2= Ne4 5.Be5+/– d6 6.Bf4 (6.Bd4 Qh4 7.g3 Qe7+/–) 6...Qf6 (6...g5 7.Bg3+=) 7.c3 (7.d4 Nf2 8.Kf2 g5+/–) 7...Qg6 (better is 7...g5 8.Qf3 Bf5+=) 8.Qf3?? (8.Nf3 Be7+/–) 8...Bf5?? (better is 8...Bg4 9.d3 Bf3 10.Nf3 Nf6–+) 9.Bd3 (9.d3 Nf6 10.e4 Be6+/–) 9...Be7+= 10.Be4?? (better is 10.g4 Nd2 11.Bf5 Nf3 12.Nf3+/–) 10...Be4–+ 11.Qh3 0-0 (better is 11...Qg2 12.Qc8 Bd8–+) 12.Bg3?? (12.Nf3 Bb1 13.Qg3–+) 12...Nd7 (better is 12...Bf5 13.a4 Re8–+) 13.Ne2 (better is 13.Qd7!? Bg2 14.Ne2 Bh1 15.Qe7–+) 13...Ne5+= (worse is 13...Bb1 14.Qd7 Rfe8 15.Qb7+–) 14.Nf4? (14.0-0 Bf5 15.Nf4 Qf6–+ (15...Bh3?! 16.Ng6 fg6 17.gh3=)) 14...Qf6?? (14...Nd3 15.Nd3 Bd3 16.Qd7–+) 15.Nh5?? (15.d4 Nc4 16.Nd2 Nd2 17.Kd2 Bf5=) 15...Qg6?? (15...Nd3 16.Kf1 Qg6 17.Ng7 Kg7 18.Qd7–+) 16.Be5?? (16.Nf4 Nd3 17.Nd3 Bd3 18.Qd7–+) 16...Bf5?? (better is 16...de5 17.0-0 Bf5–+) 17.Qg3 (better is 17.Nf4 Qg5 18.g4 de5 19.gf5 ef4 20.Ra2+=) 17...Bg5?? (better is 17...de5 18.Qg6 Bg6=) 18.Bd6 (better is 18.Bg7!? Bb1 19.h4 Be7 20.Bf8 Kf8 21.Qg6 Bg6+– (21...fg6?? 22.Rb1 gh5 23.g3+–)) 18...Qh5 19.Bf8 Rf8 (19...Bd3 20.Qf3 Qf3 21.gf3 Kf8+–) 20.Qc7?? (20.d4!? Bd3 21.Qf3 Qh4+–) 20...Bh4 (20...Bd3 21.f3 Bh4 22.Kd1 Qd5–+) 21.Qb7?? (better is 21.0-0 Qe2 22.Qf4+– (22.Qb7 Bd3 23.h3 Qf1 24.Kh2 Bf2 25.Qf7 Kf7 26.h4 Be4 27.d3 Qg2)) 21...Bf2 (21...Bd3 22.g4 Qg4 23.Qf7 Rf7 24.Rg1 Qg1) 22.Kf2+– Qh4 23.g3 Qg5 (23...Qf6 24.Ke1 Bd3+–) 24.Qc6 Qh5 (24...Rc8 25.Qa6+–) 25.Qg2 (25.Qd5 Qg6 26.Qd4 Be4+–) 25...Bh3 26.Qb7 Qf5 27.Qf3 Qg5 (27...Qc2 28.a4 Be6 29.Qd1 Qf5 30.Ke1+–) 28.d4 f5 (28...Be6 29.Re1+–) 29.Qd5 Kh8 30.Nd2 Qf6 31.Nf3 Rg8 (31...Rd8 32.Qb7 a5 33.Ne5+–) 32.a4 (better is 32.Ne5 Rf8+–) 32...h5 (32...Rd8 33.Qb7+–) 33.Ng1 h4 34.Nh3 hg3 35.hg3 Qg6 36.Nf4 (36.Ng5 Qh6 37.Qf5 Re8 38.Rh6 gh6 39.Qh7) 36...Qh7 (36...Qh6 37.Qe6 Rc8 38.Ng6 Kh7 39.Rh6 Kh6 40.Ne5 Kg5 41.Qg6) 37.Rh7 (37.Ng6) 37...Kh7 38.Qf5 (38.Rh1) 38...g6 39.Qf7 (39.Rh1 Kg7 40.Ne6) 39...Rg7 (39...Kh6 40.Qg8 Kg5 41.Qg6) 40.Rh1 1–0. Eries – interloper, ChessWorld.net, 2009.

4.c4 d5 5.Bb2 a5 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4).

4.Nf3 d6 5.Be2 (5.Nc3 e4 6.Nd4 d5=) 5...a5 6.ba5 (6.Bb2 Qb6=) 6...Qa5+= 7.0-0 Be7 8.d4 (8.d3 0-0+=) 8...e4 9.Nfd2 Qg5 10.f4 (10.Kh1 Qg6+=) 10...Qg6 11.Nc3 (11.c4 0-0+=) 11...d5 (11...Bh3 12.Rf2 d5 13.Qf1–/+) 12.a4 (12.Qe1 0-0–/+) 12...Bh3 13.Rf2 Bb4 (13...Ng4 14.Bg4 Bg4 15.Ne2–/+) 14.Bb2 (14.Na2 Ra4 15.c3 Bc3 16.Qa4 Ba1=) 14...Ng4 15.Bg4 Bg4 (15...Qg4?! 16.Qb1 Nd7 17.Kf1=) 16.Qc1 (16.Ne2 0-0–/+) 16...Nd7 17.Nf1. Yeung,Chun Keung (1640) – Walker,John T (1940), corr ICCF WSTT/3/06/Semifinal, 2008.

4.Nf3 e4 5.Nd4 +=.

4.f4 d6 5.fe5 Qh4 6.g3 (6.Ke2 Bg4 7.Nf3 de5 8.Be5 Nf6+=) 6...Qe4–/+ 7.Nf3 de5 (better is 7...Bg4 8.Be2 de5+=) 8.Be5? (better is 8.Nc3 Qf5 9.Bd3–/+) 8...Bg4–+ 9.Bg7? (9.Nc3 Bc3 10.Bc3 Bf3 11.Qb1–+) 9...Bf3 (9...Qf3? 10.Qf3 Bf3 11.Rg1+–) 10.Bg2 (10.Be2 Be2 (worse is 10...Bh1 11.Bh8 Qe3 12.c3 Qg1 13.Bf1–+) 11.Qe2 Qh1 12.Qf1 Qh2 13.Bh8 Qg3 14.Kd1 Nd7–+) 10...Bg2 (10...Bd1? 11.Be4 Bh5 12.Bh8+–) 11.Rg1 (11.Rf1 Bf1 12.Kf1 Qh1 13.Ke2 Qh2 14.Kd3–+) 11...Bf3 12.Qc1 (12.Bh8 Bd1 13.Kd1 Qf3 14.Kc1–+) 12...Qe3 (12...Qe3 13.Kf1 Qe2) 0–1. kouvitch – Iwan, internet, 2009.

4.f4 ef4 5.Qe2 Nf6 6.ef4 Kf8 –/+.

4.f4 ef4 5.ef4 Qh4 6.g3 Qe7 7.Qe2 –/+.

4.f4 ef4 5.Bg7 Qh4=+ 6.g3 fg3 7.Bg2 gh2 8.Kf1 Nf6 (better is 8...hg1Q!? 9.Kg1 Qg5 10.Bh8 d5=+) 9.Nf3+= Qc4 10.d3 Qe6 11.Bh8 Ng4 12.Qe2 (12.Nd4 Ne3 13.Ke2 Qe7=) 12...Ne3= 13.Kf2 Ng4 14.Kf1 Ne3 ½–½. Mothes,Rainer – Welti,M, corr sok, 1994.

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 c6).

5.Nc3 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.Nc3 c6 5.e3).

5.c4 0-0 6.Nf3 d5 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 c6).

5.Nf3 0-0 6.Be2 d5 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0-0 5.Nf3 d5 6.Be2 c6).

5.Nf3 d5 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e5 5.Be5 Bb4).

4.a3 a5 5.b5 d5 6.c4 Nf6 7.Nf3 (7.d4 e4=) 7...Nbd7 (7...e4 8.Nd4=) 8.d4 (8.cd5 cd5 9.Nc3 Bd6=) 8...e4 9.Nfd2 Be7 (9...cb5 10.cd5 b4 11.Bb5=) 10.Nc3 0-0 11.Rc1 Qd6 (11...Qd8 12.Qb3+=) 12.c5 Qe6 13.Be2 Ne8 14.Qa4 (14.0-0 Bg5+=) 14...f5 15.0-0 Kh8 (15...Bg5 16.bc6 bc6 17.Nb3=) 16.Rb1 f4 17.ef4 Rf4 18.Bc1 e3 19.Nf3 Nc5 20.Qc2 Qf5 21.Qb2 (21.Qf5!? Bf5 22.Be3 Bb1 23.dc5 Rf3 24.Bf3+= (worse 24.gf3 Bf5–/+)) 21...Rf3 22.Bf3 Nd3 23.Qe2 ef2 (23...Nc1 24.Qe3 Qg5 25.Re1+–) 24.Rf2 Nf2 (24...Be6 25.Rf1 Nc1 26.Rbc1+–) 25.Qe7 Nf6 26.Qf8 (26.Kf2 Qc2 27.Kg3 Qc3 28.Qd8 Ng8=+) 26...Ng8 27.Qf5 Bf5 28.Kf2 Bb1 29.Nb1 Ne7 30.bc6 bc6 31.Bf4 Re8 (31...Nf5 32.Be5+–) 32.Nd2 (32.g4 Ng6 33.Bc7 Ra8+–) 32...Nf5 33.Be5 c5 34.Bd5 cd4 35.Bc7 a4 (35...Rc8 36.Bb6 (36.Ba5 Rc5–/+) 36...Rb8 37.Ba7+– (37.Ba5 Rb5–/+)) 36.Be4+– Ne3 (36...Rc8 37.Bb6 (37.Bf5?! Rc7 38.Ke2 Rc3+=) 37...Rb8 38.Ba7+– (38.Bf5 Rb6 39.Bd7 Rb2+–)) 37.Kf3 (37.Bb6 Nc4 38.Nc4 Re4+–) 37...Rc8+= 38.Bd6 Nc2 (38...h6 39.Bd3+–) 39.Kf4 (39.Ke2 h5+–) 39...Rc3 (39...Ne1 40.h4+–) 40.Nb1 Rc8 41.Ke5 Kg8 42.h4 (42.Kd5 Kf7+–) 42...g6 (42...Re8 43.Kd5 d3 44.Bd3 Ne3 45.Kd4 Ng2 46.h5+–) 43.Nd2 Rc3 (43...Kg7 44.g3+–) 44.Nc4! Kf7 (44...Rc4 45.Bd5 Double attack (45.Bd5 Decoy)) 45.Nb2 Re3 46.Na4 Re2 47.Bc5 (47.Kd5 Ne3 48.Kd4 Nf5 49.Bf5 gf5+–) 47...Ke8 (47...d3 48.Nc3 d2 49.Kf4+–) 48.g3 (48.Bd4 Nd4 49.Kd4 Ra2+–) 48...Kd8 (48...d3 49.Kf4 Ne1 50.Nc3+–) 49.Kd5 Na3 50.Kd4 (50.Ba3 Ra2 51.Bc5 Ra4 52.Bd4 Kd7+–) 50...Nb5 51.Ke5 Ke8 52.Bb4 Kf7 53.Kf4 Nd4 54.Bd5 Ke8 55.Nc5 h6 56.Bc3 g5 (56...Nf5 57.Be4+–) 57.hg5 hg5 58.Kg4 Nc2 59.Kg5 Ke7 60.Bf6 Kd6 61.Ne4 Kc7 62.Be5 Kd8 63.Kf4 Re1 64.Bc3 Rf1 65.Ke5 Rg1 66.Bb3 Ne1 67.Kf4 (67.Kd6 Ke8+–) 67...Nd3 68.Ke3 Nc5 (68...Nc1 69.Bd5 Rd1 70.Ba5 Ke8+–) 69.Nc5 Rg3 70.Kd4 Ke7 71.Ne4 Rh3 72.Bb4 Kd8 73.Ba4 Rh4 74.Bd6 Rh5 75.Nc3 (75.Bc6 Rh1+–) 75...Rh1 76.Bc6 Rg1 77.Kc4 Rg4 78.Kb5 Rg6 79.Bc5 1–0. Cirulis,Ilmars (1675) – Fioravanti,Diego, FICGS, 2014.

4.Nf3 Bb4?? 5.Be5 d6 6.Bg7 +–.

4.Nf3 d6 +=.

5.Nf3 e4 6.Nd4 =.

6.a4 Bb4 7.ab5 d5 =.

8.Ba2 a5 9.b5 =.

8.Bb3 Bd6 =.

9.Nc3 a5 10.b5 Ne7 11.bc6 Qc6 12.d4 =.

9.Nc3 a5 10.b5 Ne7 11.d4 =.

9.Nc3 a6 10.Rc1+= Qb7 11.0-0 Ne7 12.Bb3 +=.

9.Nc3 a6 10.Rc1+= Qb7 11.0-0 Ne7 12.d4 +=.

9.Nc3 a6 10.Rc1+= Qb7 11.0-0 Nh6 12.Nd5 a5 (12...cd5?? 13.Bd5 Qd5 14.Rc8 Kf7 15.Rh8+–) 13.Nc3 ab4 14.ab4 Bb4 (14...Qb4 15.Rb1+=) 15.Ra1 (15.Bc4 Bd6 16.Ne4 Nf5+/–) 15...Bg4 16.Qb3 (16.h3 Bh5+=) 16...Qe7 (16...c5 17.Ne1=) 17.d4 (17.Ne1 Bd6=) 17...Ra6 (17...Bf3!? 18.gf3 ed4 19.ed4 Qd6=) 18.de5+/– Bf3 19.ef6 (19.gf3?! fe5 20.Ne4 Nd7+=) 19...gf6 20.gf3 Nd7 (20...Rg8 21.Kh1 Bd6 22.Ne4+–) 21.Ne4 (21.Qc4 Nb8+/–) 21...c5 (21...Rg8 22.Kh1 f5 23.Nc3+/–) 22.Rfd1 (22.Qd3 Rb6+–) 22...Ne5 (22...Rg8 23.Kh1 f5 24.Nc5 Bc5 25.Rd7 Qd7 26.Qb8 Ke7 27.Qe5 (27.Bg8?! Ra1 28.Ba1 Qd1 29.Kg2 Qa1=) 27...Kd8 28.Qc5 Ra2 29.Qb6 Ke8 30.Qb8 Ke7 31.Qe5 Kd8 32.Qf6 Ke8 33.Qe5 Kd8 34.Qf6 Ke8 35.Qe5 Kd8=) 23.Be5 (23.Qd5 Rg8 24.Kh1 Rg6+–) 23...fe5+/– 24.Qd5 (24.Qd3 Rg6 25.Kh1 Qc7+–) 24...Rg8 25.Kf1 Rgg6 26.Bc4 Do you see the mate threat? 26...Ra1 27.Ra1 Do you see the mate threat? 27...Kf8 28.Ra8 Kg7 29.Rd8 (29...Nf7 30.Rd7+–) 1–0. Ree,H – Ciric,D, Wijk, 1969.

9.Nc3 a6 10.Rc1+= e4 11.Nd4 Qd7 12.0-0 +/–.

5.c4 Be6 6.Qc2 Bd6 7.d3 Nf6 8.Nf3 dc4 (8...Nbd7!?=+) 9.dc4+= c5 10.Nc3 a6 11.Qa4 Bd7 12.Nb5 Bb5 13.cb5 0–0 (13...Nbd7 14.b6 Qb6 15.Ne5 Be5 16.Be5+=) 14.bc5+/– Qc5 15.Rc1 Qd5 16.Rd1 Qa2 17.Be5 (17.Rd6?! Qb2 18.Qb4 Qb4 19.ab4 e4=+) 17...Be5 18.Ne5 Qb2 19.Nc4 (19.f4 Qc3 20.Kf2 Qc7+/–) 19...Qb5 20.Qb5 ab5 21.Nd6 Ra3 22.Bb5 b6 23.e4 Rc3 24.0–0 Rc5 25.f3 Nc6 26.Bc6 Rc6 27.f4 Ne8 28.Nf5 Rc4 29.e5 b5 (29...Nc7!?+/–) 30.Ne7+– Kh8 31.Rd8 Rc7 32.Nd5 Rc5 33.Ra1 h5 34.Raa8 Kh7 35.Ne3 b4 36.Re8 Re8 37.Re8 Rb5 38.Rd8 b3 39.Rd1 g5 40.g3 gf4 41.gf4 Rb4 42.Rb1 Rf4 43.Rb3 Re4 44.Kf2 Re5 45.Kf3 Kg6 46.h4 f6 47.Ng2 Kg7 48.Rb7 Kg8 49.Nf4 Rf5 50.Ra7 Re5 51.Rd7 Rb5 52.Nd5 Kf8 53.Ke4 Rb2 54.Kf5 Rf2 55.Kg6 Ke8 56.Rh7 f5 57.Nc7 Kd8 58.Ne6 Kc8 59.Rh5 Kd7 60.Rf5 Rh2 61.Nc5 (61...Ke7 62.h5+–) 1–0. orane – HMBCHESS2, Caissa's Web, 2005.

5.d4 e4 6.c4 f5 (6...Nf6 7.Nc3=) 7.Nc3 Nf6 8.Rc1 (8.cd5 Nd5 9.Nd5 cd5+=) 8...Be6= 9.Qb3 (9.cd5 Nd5 10.Nge2 Qf7=) 9...Qf7 10.cd5 Nd5 11.Bc4 Nd7 12.Bd5 (12.Nh3 Nf4 13.Be6 Qe6 14.Qe6 Ne6=) 12...Bd5 (worse is 12...cd5 13.Nb5 Kd8 14.Nh3+/–) 13.Nd5 Qd5 14.Qd5 cd5 15.Rc7 Rb8 16.Ne2 Bd6 17.Rc2 Ke7 18.Nc3 Ke6 19.Na4 (19.Ke2 Rhc8 20.Rhc1 Ra8=) 19...b6 (19...Rhc8 20.Nc5 Ke7 21.Kd2+=) 20.Ke2 Rhc8 21.Rhc1 Rc2 22.Rc2 Nf6 23.h3 h5 24.b5 h4 25.Bc1 g5 26.Rc6 Kd7 27.Nc3 Rc8 28.Rc8 Kc8 29.a4 (29.f4 ef3 30.Kf3 Kd7+=) 29...Kd7 30.Na2 (30.f4 ef3 31.Kf3 Ne4+=) 30...Ne8 (30...g4 31.Nc3–/+) 31.Bd2 Nc7 32.Be1 (32.Bb4 g4+=) 32...a6 33.ba6 Na6 34.Nc3 (34.f4 gf4 35.ef4 Nc7+=) 34...Kc6 (34...Nb4 35.f4 gf4 36.ef4–/+) 35.f4 ef3 (35...gf4!? 36.Nb5 Be7 37.ef4 Nb4 38.Bb4 Bb4+=) 36.gf3= Be7 (36...Bb4 37.Bd2=) 37.e4+= fe4 (37...Nc7 38.ef5 Ne8 39.Ne4+=) 38.fe4 de4 39.Ne4 (39.Ke3 g4 40.hg4 h3+=) 39...Kd5 (39...Nc7 40.Bf2=) 40.Kd3+= Nb8 (40...g4 41.hg4 h3 42.Nc3 Ke6 43.Bg3+=) 41.Nc3 (41.Bd2 Na6+/–) 41...Ke6 42.Ke4 (42.Kc4 Nd7+/–) 42...Nd7 (42...Bb4!?=) 43.Nd5+/– Bd6 44.Ne3 (44.Bd2 g4 45.hg4 Nf6 46.Nf6 h3 47.d5 Kf6+–) 44...Nf6= 45.Kf3 Nd5 (better is 45...Bf4!?=) 46.Nd5+/– Kd5 47.Bf2 Bf4 48.Kg4 Bd2 49.Kf5 Bc1 50.Kg4 Bd2 51.Kf3 Bf4 52.Bg1 Bg3 53.Be3 Bf4 ½–½. Klasmeier,Hartmut (1990) – Weskamp,Matthias (1675), NRW Class1, 2005.

5.Nf3 Bd6 =.

5.Nf3 e4 6.Nd4 b5 7.a4 ba4 (7...Bb4? 8.Nb5! (8.ab5?! Nf6=) 8...cb5 9.Bg7 ba4 10.Bh8+–) 8.c4 Nf6 9.Qa4 Be7 10.b5 Bd7 11.cd5 cd5 (< 11...Nd5 12.bc6 Bc8 13.d3+/–) 12.Nc3 0-0 13.Qa5 Qb7 14.Be2 Bd8 15.Qa3 Be6 16.0-0 Be7 17.Qa5 Bd8 18.Qa2 Bb6 19.Na4 Nbd7 20.Rfc1 Kh8 21.Rc6 Rfe8 22.Rac1 Rac8 23.Nb6 Nb6 24.Ra1 Bd7 25.Rc8 Nc8 26.Qa6 Qb8 27.h3 h6 28.Ba3 Qe5 29.Bc5 Qg5 30.Kf1 (< 30.Ba7 Bh3 31.Bf1 Na7 32.Qa7 Kg8=) 30...Qe5 31.Ke1 Qh2 32.Bf1 Nh5 33.Ba7 Ng3?? (better is 33...Nf6+/–) 34.Bb8+– (34...Qg1 35.Bg3+–; < 34.fg3 Qg3 35.Ke2 Nd6+–) 1–0. Rudolf,Herbert (2225) – Brod,Manfred (2235), AUT–chT2O, 2003.

6.cd5 cd5 7.d4 (7.Nf3 e4 8.Bf6 gf6=) 7...e4 8.Nc3 a6 9.Rc1 Nc6 10.Be2 Be6 11.f3 Rd8 (11...Bd6 12.fe4 Bh2 13.e5 Bg1 14.Rg1+=) 12.fe4 de4 13.Qc2 Bf5 (13...h5 14.Ne4 Ng4 15.Qd3=) 14.g4+= Bg6 (14...Ng4? 15.Bg4 Bg4 16.Qe4 Qe7 17.Qg4 Rd4 18.Qe2 Qh4 19.Kf1+–) 15.g5 Nd5 16.Nd5 (16.Ne4? Ne3 17.Qc3 Ng2 (17...Be4?! 18.Qe3 Qe7 19.Bf3=) 18.Kf2 Be4–+) 16...Rd5 17.Nh3 Qd7 18.Nf4 Rg5 19.h4 Rg3 20.d5 Nb4 (20...Ne7!? 21.Kf2 Rg4 22.Bg4 Qg4 23.Qa4 b5+–) 21.ab4+– Re3 22.Ng6 hg6 23.Kd2 Re2 24.Ke2 Qg4 25.Ke3 Qg3 26.Kd4 (26.Ke4?! f5 27.Kd4 Qf4 28.Kc3 Qb4 29.Kd3 Qe4 30.Kd2 Bb4 31.Bc3 Qg2 32.Kd3 Qe4 33.Kd2 Qg2 34.Kd3 Qe4 35.Kd2=) 26...Be7 27.Qc8 Bd8 28.Kc5 (28.Ke4? 0-0 29.Qd7 Bb6–+) 28...Qe3? (better is 28...b6!? 29.Kc6 0-0+–) 29.Bd4+– Qf4 (29...Qd2 30.Rhd1 Qe2 31.Qb7+–) 30.Qb7 Rh5 (30...0-0+–) 31.Bg7 (31.Ra1 Be7 32.Kc4 Bd8 33.Qc6 Kf8 34.Ra6 Qc7+–) 31...Be7 32.Kc4 (32.Kc4 f6 33.Qc8 Kf7 34.Qe6 Kg7 35.Qe7 Kh6 36.Qd8+–) 1–0. Schirmer,Michael – Malmstroem,Jan, corr TKM/A009, 1999.

6.cd5 Nd5 7.Nc3 Nc3 8.dc3 Be6 9.Nf3 Be7 (9...Bd6 10.Bd3+=) 10.Bd3 Nd7 11.0-0 0-0 12.Qc2 f5 13.e4 (13.c4 c5 14.Qc3 Rad8=) 13...f4 (13...fe4 14.Be4 Nf6 15.Ng5+/–) 14.c4 Rad8 15.c5 g5 (15...b6!?=) 16.Bc4+= Bf7 17.Qc3 Bf6 18.h3 h6 (18...Bc4 19.Qc4 Kg7 20.Rfd1+=) 19.Rfd1 Kh7 20.Bf7 Rf7 21.Rd6 Bg7 22.Rad1 Re8 (22...Rff8 23.Qd3 Rf7 24.Qd2+–) 23.Qd3 (23.Qc4 Rfe7+–) 23...Ree7 (better is 23...Rd8+/–) 24.Nd4?? (better is 24.a4+–) 24...ed4–/+ 25.e5 (better is 25.Bd4 Ne5 26.Be5 Be5 27.Qf3–+) 25...Kg8?? (better is 25...Kh8 26.e6 Ne5–/+) 26.e6+= Rf6 (26...Rf8 27.ed7 Rd7 28.Qc4 Rff7 29.Rd7 Qd7 30.Bd4=) 27.Rd7+/– Rd7 28.ed7 Qd7 29.Qd4 (29.Bd4 Re6 30.Qc4 Qf7+=) 29...Qd4= 30.Bd4 Rf7 ½–½. Hjortstam,Kurt – Kilpatrick,Robert, corr 3GMM–01, 1995.

6.cd5 Nd5 7.d4 =.

6.Nf3 Nbd7 7.Nc3 a6 (7...dc4 8.d4+=) 8.Rc1 (8.cd5 Nd5 9.Bc4 Nc3 10.Bc3 Bd6=) 8...Qd6 (8...e4 9.Nd4 dc4 10.Qc2=) 9.cd5+= cd5 10.Qa4 Rb8 (10...Qb8 11.g3=) 11.Ne2 (better is 11.Ne4! de4 12.Be5 ef3 13.Bd6 Bd6 14.gf3+/–) 11...b5= 12.Qb3 Bb7 13.Ng3 g6 14.d3 Bg7 15.Be2 0-0 16.0-0 Rfc8 17.h3 h6 18.Qa2 Ne8 19.Qa1 Rc7 20.Rc7 Nc7 21.Bd1 Ne6 22.Bb3 Rc8 23.Rd1 Kh7 24.Qa2 Nb6 25.Qa1 Nd7 26.h4 Rf8 27.h5 Bf6 28.Qa2 Nb6 29.e4 d4? (better is 29...Nf4+=) 30.hg6+– Kg6 31.Nf5 Qd7 32.Bc1 Ng5?? (32...Na4 33.Ba4 ba4 34.Bh6 Rc8+–) 33.N3h4 Kh7 34.Qe2 Rg8 (34...Qc6 35.Qh5 Bd8 36.Bg5 Bg5 37.Bf7 Bh4 38.Nh4 Bc8+–) 35.Qh5 Rg6 1–0. Nikitin,Aleksander S (2000) – Wieczorek,Maciej (2060), Krakow op–B, 2000.

6.Nf3 Nbd7 7.d4 e4= 8.Nfd2 g6 (8...a5!? 9.b5 Be7=) 9.Nc3+= Bg7 10.cd5 cd5 11.Nb5 (11.Rc1 Qd8+=) 11...Qb8 (better is 11...Qd8!?+=) 12.Rc1+– 0–0 13.Nc7 Nb6 14.Na8 Qa8 15.Be2 Bd7 16.0–0 a6 17.h3 (17.Qb3 Ba4 18.Qa2 Bb5+–) 17...Ne8 (17...Ba4 18.Qe1+/–) 18.Qc2 f5 (18...Qd8 19.Qc5+–) 19.Qc5 (19.f3 Bh6 20.f4 Na4+–) 19...Rf6 20.Qa5 Rd6 21.Rc2 1–0. marekt (2175) – towa (1830), gameknot.com, 2014.

6.Nf3 Nbd7 7.cd5 Nd5 8.Bc4 f6 +=.

6.Nf3 Nbd7 7.cd5 e4 8.dc6 bc6 =.

5.c4 Be6 A) 6.Nf3 Nf6 7.Be2 Be7 8.0-0 0-0 9.d4 e4 10.Ng5; B) 6.Be2 a5 (6...Nf6 7.Nf3 Be7 8.0-0 a5 9.d4 e4 10.Ng5; 6...Be7 7.Nf3 Nf6 8.0-0 a5 9.d4 e4 10.Ng5; 6...c5 7.Nf3 Nf6 8.bc5 Qc5 9.d4 Qb6 10.Nc3; 6...Nd7 7.Nf3 Ngf6 8.0-0 Nb6 9.Qc2 Bg4 10.e4) 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 Na6 10.b5; C) 6.Nc3 Nf6 (6...Be7 7.Nf3 Nf6 8.d4 e4 9.Nd2 Bg4 10.Qc2; 6...a5 7.b5 Nf6 8.Nf3 Be7 9.d4 Bf5 10.Be2) 7.d4 ed4 8.Qd4 Nbd7 9.Nf3 Be7 10.Be2; D) 6.d4 Nf6 7.Nd2 e4 8.Ne2 a5 9.d5 cd5 10.Bf6.

5.c4 Be7 A) 6.Nf3 Nf6 (6...a5 7.Be2 Nf6 8.0-0 0-0 9.Nc3 ab4 10.ab4) 7.Be2 a5 8.0-0 0-0 9.Nc3 ab4 10.ab4; B) 6.d4 e4 7.Nd2 f5 8.Qh5 g6 9.Qd1 Nf6 10.d5; C) 6.Nc3 Nf6 7.Nf3 a5 8.b5 0-0 9.Be2 Bg4 10.d4; D) 6.Qc2 Nf6 (6...Be6 7.Nf3 Bg4 8.Be2 Nf6 9.Nc3 a5 10.0-0; 6...a5 7.d4 ab4 8.ab4 Ra1 9.Ba1 Na6 10.Bc3) 7.Nf3 a5 8.d4 e4 9.Nfd2 Bf5 10.Be2; E) 6.Be2 Nf6 (6...Nd7 7.Nf3 Ngf6 8.Nc3 0-0 9.d4 a5 10.Bd3) 7.Nf3 0-0 8.Nc3 a5 9.0-0 ab4 10.ab4.

5.c4 f5 6.Nf3 (6.d4 Nf6 7.Be2 Be7 8.de5 de5 9.Nf3 e4 10.Be5; 6.Be2 Nf6 7.Nf3 Be7 8.0-0 0-0 9.Nc3 a5 10.Qb3) 6...Nf6 (6...Be7 7.Be2 Nf6 8.0-0 0-0 9.Nc3 a5 10.Qb3) 7.Nc3 (7.Be2 a5 8.0-0 Be7 9.Nc3 ab4 10.ab4) 7...Be7 (7...a5 8.Be2 ab4 9.ab4 Ra1 10.Qa1) 8.Be2 Nbd7 (8...e4 9.Nd4 a5 10.d3) 9.Qb3 (9.0-0 Nb6 10.d4) 9...e4 (9...0-0 10.0-0) 10.Nd4 Ne5 11.f4 ef3 12.gf3 f4 13.0-0 0-0 14.Kh1 Kh8 15.ef4 Ng6 16.f5 Nf4 17.Bd1 d5 18.cd5 N6d5 19.Nd5 cd5 20.Rc1 Qd8 21.Bc2 Bd7 22.Rg1 Bf6 23.Rg4 Nh3 24.Rf1 (24.Kg2 h5 25.Kh3 hg4 26.fg4 Qb6 27.Qd5 Rad8–/+) 24...h5= 25.Rg3 Nf4 26.Rfg1 Qe7 27.Rg7 (27.Ne6 Be6 (27...Ne6 28.fe6 Be6 29.Qd3+–) 28.fe6 d4+=) 27...Bg7= 28.Nc6 bc6 29.Rg7 Qg7 30.Bg7 (30.Bg7 Kg7 31.Qc3 Rf6 32.Qe5+/–) 1–0. marekt – Gary K, ChessWorld.net, 2009.

5.c4 Bf5 A) 6.d4 Nf6 (6...Be7 7.Qf3 Bg6 8.Qg3 Nd7 9.de5 de5 10.Nf3; 6...Nd7 7.Qf3 Bg6 8.Nd2 Ngf6 9.e4 Qb6 10.c5; 6...e4 7.d5 Nd7 8.Ne2 Ngf6 9.Nd4 Bg6 10.Be2) 7.Ne2 Bg4 8.h3 Be6 9.Ng3 Nbd7 10.e4; B) 6.Be2 a5 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 Na6 10.b5; C) 6.Ne2 Be6 (6...Nf6 7.d4 Bg4 8.e4 Be7 9.Qd3 0-0 10.Nd2; 6...Nd7 7.Ng3 Be6 8.d4 Ngf6 9.Be2 Be7 10.e4; 6...a5 7.Ng3 Be6 8.d4 ab4 9.d5 Bd7 10.ab4; 6...Be7 7.Ng3 Bg6 8.d4 Nf6 9.Bd3 e4 10.Be2) 7.Ng3 a5 8.d4 ab4 9.d5 Bd7 10.ab4; D) 6.Nf3 Be7 (6...Nf6 7.Be2 Be7 8.0-0 0-0 9.Nc3 Nbd7 10.d4; 6...Nd7 7.Be2 Ngf6 8.0-0 Be7 9.Nc3 0-0 10.d4; 6...a5 7.d4 e4 8.Nfd2 ab4 9.ab4 Ra1 10.Ba1) 7.Be2 Nf6 8.0-0 0-0 9.Nc3 Nbd7 10.d4.

5.c4 Nf6 A) 6.Be2 Be7 (6...Nbd7 7.d4 a5 8.b5 Be7 9.Nc3 ed4 10.Qd4; 6...a5 7.d4 ab4 8.ab4 Ra1 9.Ba1 d5 10.c5; 6...Bf5 7.Nf3 Be7 8.0-0 0-0 9.Nc3 Nbd7 10.d4; 6...Be6 7.Nf3 Be7 8.0-0 a5 9.d4 e4 10.Ng5) 7.Nf3 a5 8.0-0 0-0 9.Nc3 ab4 10.ab4; B) 6.Nf3 Be7 (6...Nbd7 7.Be2 Be7 8.0-0 0-0 9.Nc3 a5 10.b5; 6...a5 7.Be2 ab4 8.ab4 Ra1 9.Ba1 e4 10.Nd4) 7.Be2 0-0 8.Nc3 a5 9.b5 Bg4 10.0-0; C) 6.Nc3 Be7 7.d4 0-0 8.Nf3 e4 9.Nd2 Bg4 10.Qb3; D) 6.d4= e4 7.Nd2 Be6 8.Ne2 a5 9.b5 Nbd7 10.bc6.

5.Be2 A) 5...Nf6 A1) 6.c4 Be7 (6...Nbd7 7.d4 a5 8.b5 Be7 9.Nc3 ed4 10.Qd4; 6...a5 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 e4 10.Nd4; 6...Be6 7.Nf3 Be7 8.0-0 a5 9.d4 e4 10.Ng5; 6...Na6 7.Nf3 Be7 8.0-0 0-0 9.Nc3 Bf5 10.d4) 7.Nf3 a5 8.0-0 ab4 9.ab4 Ra1 10.Ba1; A2) 6.Nf3 Be7 (6...Nbd7 7.0-0 d5 8.c4 e4 9.Nd4 dc4 10.Bc4; 6...Bf5 7.0-0 Be7 8.c4 Nbd7 9.Nc3 0-0 10.d4) 7.0-0 0-0 8.c4 a5 9.Nc3 ab4 10.ab4; B) 5...Be7 B1) 6.c4 Nf6 (6...Nd7 7.Nf3 Ngf6 8.Nc3 0-0 9.d4 a5 10.b5; 6...a5 7.d4 e4 8.d5 Nf6 9.b5 0-0 10.dc6; 6...Be6 7.Nf3 Nf6 8.0-0 0-0 9.d4 e4 10.Nfd2) 7.Nf3 a5 8.Nc3 ab4 9.ab4 Ra1 10.Qa1; B2) 6.Nf3 Nf6 (6...Nd7 7.0-0 Ngf6 8.c4 0-0 9.Nc3 a5 10.b5) 7.0-0 0-0 8.c4 a5 9.Nc3 ab4 10.ab4; C) 5...Be6 C1) 6.d4 Nf6 (6...Nd7 7.Nf3 Ngf6 8.0-0 e4 9.Ng5 Bf5 10.f3; 6...Be7 7.c4 Nf6 8.Nd2 ed4 9.Bd4 c5 10.Bb2) 7.c4 Nbd7 8.Nd2 e4 9.Qc2 d5 10.cd5; C2) 6.c4 Nf6 (6...Be7 7.Nf3 Nf6 8.0-0 a5 9.d4 e4 10.Ng5; 6...a5 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 Nf6 10.Ng5) 7.Nf3 Be7 8.0-0 a5 9.d4 e4 10.Ng5; C3) 6.f4 ef4 7.ef4 Ne7 8.Nf3 Ng6 9.g3 Nd7 10.0-0; C4) 6.Nf3 Be7 (6...Nf6 7.0-0 Be7 8.c4 0-0 9.d4 e4 10.Nfd2) 7.0-0 Nf6 8.c4 a5 9.d4 e4 10.Ng5; D) 5...d5 D1) 6.c4 dc4 (6...Nf6 7.d4 e4 8.cd5 Nd5 9.Qc2 f5 10.Nc3; 6...a5 7.c5 ab4 8.ab4 Ra1 9.Ba1 Nd7 10.Nf3) 7.Bc4 b5 8.Bb3 a5 9.Qh5 Nf6 10.Qe5; D2) 6.d3 a5 (6...Bd6 7.c4 Nf6 8.Nf3 Nbd7 9.cd5 Nd5 10.Nc3; 6...Nd7 7.c4 Ngf6 8.Nf3 a5 9.b5 dc4 10.dc4) 7.Nf3 Bd6 8.Nbd2 b6 9.c4 ab4 10.ab4; D3) 6.Nf3 Nd7 (6...e4 7.Nd4 Nf6 8.f4 a5 9.ba5 Ra5 10.0-0) 7.c4 e4 8.Nd4 dc4 9.Nc3 Ngf6 10.Qc2.

5.Nf3 A) 5...Nf6 6.Be2 Be7 (6...Nbd7 7.0-0 d5 8.c4 e4 9.Nd4 dc4 10.Bc4) 7.0-0 0-0 8.c4 a5 9.Nc3 ab4 10.ab4; B) 5...Nd7 B1) 6.c4 Ngf6 (6...Be7 7.Nc3 f5 8.Be2 Ngf6 9.0-0 0-0 10.d4) 7.Nc3 Nb6 8.d4 Be6 9.c5 Nc4 10.Bc4; B2) 6.Be2 Ngf6 (6...Be7 7.0-0 Ngf6 8.c4 a5 9.Nc3 0-0 10.b5) 7.0-0 d5 8.c4 e4 9.Nd4 dc4 10.Bc4; C) 5...Be7 C1) 6.c4 Nf6 (6...a5 7.Be2 Nf6 8.0-0 0-0 9.Nc3 ab4 10.ab4; 6...Bf5 7.Be2 Nd7 8.Nc3 Ngf6 9.0-0 0-0 10.d4) 7.Be2 0-0 8.Nc3 a5 9.b5 Bg4 10.0-0; C2) 6.e4 f5 (6...Nf6 7.d4 Ne4 8.de5 0-0 9.Bd3 f5 10.0-0) 7.ef5 Bf5 8.d4 e4 9.d5 ef3 10.Qf3; C3) 6.Be2 Nf6 (6...Nd7 7.0-0 Ngf6 8.c4 a5 9.b5 0-0 10.Nc3) 7.0-0 0-0 8.c4 a5 9.Nc3 ab4 10.ab4.

(--> 1.b4 e5 2.Bb2 d6 3.e3 c6).

4.c4 f5 5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 c6).

4.c4 f5 5.Nf3 Nf6 6.Be2 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 c6).

4.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

(--> 1.b4 e5 2.Bb2 e4 3.e3 c6).

4.a3 d5 5.c4 Nf6 (---> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 Nf6 5.c4 c6).

4.c4 Nf6 5.a3 d5 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 Nf6 5.c4 c6).

4.c4 Nf6 5.b5 d5 (---> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5 5.c4 c6).

4.a3 d5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6).

4.a3 d5 5.c4 Be6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Be6 5.c4 c6).

4.b5 d5 5.c4 Be6 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 Be6 5.c4 c6).

4.Bb2 d5 5.a3 Bd6 6.Be2 Nd7 7.Nf3 Ne7 8.0-0 Qc7 9.d3 0-0 10.Qd2 f5 11.Ng5 Nf6 12.f4 (better is 12.Rae1–+) 12...ef4 13.Rab1 (13.Kh1 fe3 14.Qe3 Bh2–+) 13...Ng6 14.Nf3 fe3 15.Qe3 Ng4 Black prepares the advance f4 16.Qg5 Bf4 17.Qh5 Nf6 18.Qh3 Be3 19.Kh1 f4 20.g4 h5 (worse is 20...Ng4 21.Qg2–+) 21.Qg2 hg4 (worse is 21...Bg4 22.Rbe1–+) 22.Bd1 Bf5 23.Nd2 Nh4 24.Qe2 Rae8 25.Nb3 (25.Qe1 g3 26.Bf3 Bh3 27.hg3 fg3–+) 25...g3 26.hg3 fg3 27.Rf5 Bf2 28.Rf2 Re2 29.Re2 (29.Ne2 gf2 30.Nd2–+) 29...Ng4 (29...Ng4 30.Kg1 Qf4 31.Nd2 Ne3 32.Nf3 Nf3 33.Kh1 Qh4 34.Rh2 Qh2; 29...Ne4 30.Nd2 Qf4 31.Rg2 Qf1 32.Nf1 Rf1 33.Rg1 Nf2) 0–1. Neffgen,Dieter (1840) – Taulien,Hans_Juergen (2350), RS6D – A00 – Sokolsky Alt–1, 2004.

4.Nf3 Bc3 5.dc3 e4 6.Nd2 Nf6 7.Ba3 d5 8.Be2.

4.Nf3 d6 5.Bb2 Nf6 6.Be2 0-0 7.0-0 Bf5 8.a3.

4.Qg4 Bc3 5.dc3 g6 6.Qg3 d6 7.Bd3 f5 8.Nh3.

4.a3 A) 4...a5 5.b5 (5.Bb2 ab4 6.ab4 Ra1 7.Qa1 Bb4 8.Na2; 5.ba5 d5 6.d4 Bd6 7.Bd2 ed4 8.ed4; 5.Rb1 ab4 6.ab4 d5 7.b5 Bd6 8.Bb2) 5...d5 6.Bb2 Bd6 7.bc6 bc6 8.Nf3; B) 4...d5 5.Nf3 (5.Bb2 Bd6 6.Be2 0-0 7.Nf3 a5 8.Na2; 5.Be2 b5 6.Nf3 a5 7.ba5 Bd6 8.Bb2) 5...Bd6 6.Bb2 a5 7.ba5 Ra5 8.Be2.

4.Rb1= d5 5.Nf3 Bd6 6.a3 b5 7.a4 a5 8.ab5.

4.Nf3 Bd6 5.d3 (5.a3 0-0= (5...e4 6.Nd4 Be5 7.Be2 d5 8.Bb2) 6.e4 Bc7 7.d4 d5 8.Ne5; 5.Bb2 0-0 6.a3 Bc7 7.Be2 d5 8.0-0) 5...0-0 (5...Bb4 6.Bd2+= Qa5 7.Ne4 Ne4 8.de4) 6.Bb2 (6.a3 a5 7.b5 Bc7= 8.Be2) 6...b6 (6...Bb4 7.a3 Ba5 (7...Bc3 8.Bc3) 8.Ne5 d5–+) 7.a3= Qe7 (7...Bc7 8.Be2) 8.Be2 Bb7 9.0-0 c5 (9...Bc7 10.Ne4=) 10.bc5 (10.Nb5 Re8+/–) 10...Bc5 11.Re1 (11.d4 Bd6 12.de5 Be5 13.Nd5 Nd5 14.Ne5+=) 11...Qe6? (11...Nc6 12.d4 Bd6 13.de5 Ne5 14.Nb5+=) 12.Ng5 (better is 12.Nb5!? Qc6 13.d4 ed4 14.ed4+–) 12...Qf5+= 13.Nf3 Be3?? (better is 13...Qe6=) 14.fe3+– Ng4 (14...d6 15.Rf1+–) 15.e4 Qh5 (15...Qf4 16.Bc1 Qf6 17.h3+–) 16.h3 Nf6 (16...Nh6 17.Qd2 f6 18.Nb5+–) 17.Nb5 d5 (17...Ne8 18.Qd2+–) 18.Nc7 (better is 18.Nd6 Ba6 19.Ne5 Qg5+–) 18...de4 19.de4 Ne4 (19...Nc6 20.Na8 Ra8 21.Ne5+–) 20.Na8 Ng3 (20...Ba8 21.Bd3 Nc5 22.Re5+–) 21.Nc7 e4 22.Nd4 (22.Ne5 Ne2 23.Qe2 Qe2 24.Re2 f6+–) 22...Ne2 (22...Qc5 23.Ncb5 a6 24.Nc3+–) 23.Ne2 e3 (23...Rc8 24.Qd4 Qg5 25.Rad1+–) 24.Nf4 (24.Qd4 Qg5 25.Nf4 e2+–) 24...Qd1 (24...Qc5 25.Qd4 Qd4 26.Bd4+–) 25.Rad1 Nc6 (25...Be4 26.Re3 Bf5 27.Rd6+–) 26.Re3 Ne7 (26...Na5 27.Bc3 h6 28.Nh5+–) 27.Ncd5 (better is 27.Re7 Bc6+–) 27...Nf5 28.Ree1 (better is 28.Ne7!? Ne7 29.Re7 Bc8+–) 28...Bd5 29.Nd5 b5 30.Ne7 (better is 30.Re5 Nh4 31.Ne7 Kh8+–) 30...Ne7 31.Re7 h6 32.Ra7 f6 33.Rdd7 Kh7 (33...Rc8 34.Rg7 Kh8 35.Bf6 Rf8 36.Rh7 Kg8 37.Rag7) 34.Rg7 Kh8 35.Rh7 Kg8 36.Rag7 1–0. leighcastle – interloper, ChessWorld.net, 2009.

4.Nf3 e4 5.Nd4 (5.Ng5 d5 6.a3 h6 7.Nh3 Bh3 8.gh3) 5...Bb4 6.Rb1+= (6.Bb2 d5 7.Be2 0-0 8.0-0) 6...Bc3 7.dc3 d6 8.Ba3.

4.c3 Ba5 5.Bd2 (better is 5.de5!? Bc7 6.Nf3= d5 7.ed6 Qd6 8.Qd6) 5...ed4 (5...d6 6.Bd3–/+ (6.de5 de5 7.Qh5 Nd7 8.Nf3) 6...Nf6 7.e4 Qb6 8.Qc2) 6.cd4 Nf6 7.Nc3 (7.Bd3 0-0 8.Nf3) 7...d5 8.Bd3 Ng4 (8...0-0 9.Nf3–/+) 9.h3 (9.Nf3 0-0+=) 9...Nf6–/+ 10.Nf3 h6 11.0-0 0-0 12.Rb1 Qe7 (12...Re8 13.Qc2+=) 13.Ne5 (better is 13.Nd5 Nd5 14.Ba5+=) 13...Bc7–/+ 14.f4 b5 (14...Re8 15.Re1–/+) 15.Qc2 Nbd7?? (better is 15...Bd6+=) 16.Nc6+– Qd6?? (better is 16...Qe8 17.Nb5 Bb6+–) 17.Nb5 (17.Bb5?! a6+/–) 17...Qc6 (17...Nb8 18.Nd6 Bd6 19.Nb8 Rb8+–) 18.Qc6 (18.Nc7?! Qc2 19.Bc2 Rb8+–) 18...Bb6 19.Qa8 Ba6 20.Qc6 Rc8 21.Qd6 Bb5 22.Bb5 Bc7 23.Qa3 (better is 23.Qc6 g6+–) 23...Bb6 24.Bd7 (24.Rfc1 Re8+–) 24...Nd7 25.Rbc1 (25.Rfc1 Re8+–) 25...Re8 26.Ba5 Ba5 27.Qa5 Nf6 28.Rfe1 Re7 29.Rc8 Kh7 1–0. leighcastle – maftei, ChessWorld.net, 2009.

4.c3 Bd6 5.Bd3 Nf6 6.Nd2 Qe7 7.Qc2 ed4 8.cd4.

4.c3 Bd6 5.e4+= Qe7 6.Bd3 ed4 7.cd4 Bb4 8.Bd2.

4.c3 Bd6 5.e4 Qe7–/+ 6.Bd3 ed4 7.cd4 Nf6 8.e5.

4.c3 Bd6 5.de5 Be5 6.Nf3 Bc7 7.Bd3 d5 8.0-0.

4.c3 Bd6 5.Nf3 e4–/+ 6.Nfd2 Nf6 7.Qc2 (7.g4 Be7 (7...h6 8.Bg2) 8.g5 Ng8 9.Ne4 d5–/+) 7...Qe7 8.Bc4 (8.c4 Bb4–/+) 8...Bc7 9.Nf1 (9.Be2 0-0–/+) 9...d5 10.Be2 b5 (10...Bg4 11.f3 Bf5 12.Qb3–+) 11.Nbd2 (11.a4 ba4 12.Ba3 Qd8–/+) 11...0-0 (11...Bg4 12.Bg4 Ng4 13.a4–+) 12.Nb3 (12.a4 Bg4 13.Ba3 Bd6 14.Bd6 Qd6–/+) 12...Na6 (12...Bd6 13.Ng3–+) 13.a4–/+ Qd7 14.Ng3 Bg3 (14...Rd8 15.0-0–/+) 15.fg3 (15.hg3 Re8–/+) 15...Nc7 (15...Re8 16.0-0–/+) 16.Ba3 Ba6?? (better is 16...Rd8–/+) 17.Bf8+/– Kf8 18.Nc5 Qc8 19.0-0 Ne6 (19...ba4 20.c4+/–) 20.Ne6 (better is 20.Na6!? Qa6 21.ab5+–) 20...Qe6+/– 21.Qb2 Qd7 (21...Qc8 22.Qc1+/–) 22.h3 (22.Qb4 Kg8+/–) 22...Rb8 (22...Kg8 23.Qb4+/–) 23.g4 (23.ab5 Bb5 24.Qa3 Kg8 25.Bb5 cb5 26.Qa7 Qd6+/–) 23...Ne8 (23...Rb7 24.g5 Ne8 25.Qb4 Kg8 26.Qa5+/–) 24.h4 (24.ab5 Bb5 25.Bb5 Rb5 26.Qa3 Nd6 27.Qa7 Qb7+/–) 24...Qd8 (24...Kg8 25.Qb4+=) 25.g5 (better is 25.ab5 Bb5 26.Ra7+/–) 25...ba4?? (25...Rb7+=) 26.Qd2?? (better is 26.Qa3 Qd6 27.Ba6+–) 26...Be2 (26...Bb5 27.Qa2=) 27.Qe2 Qa5 28.Rfc1 (28.Qf2 Rb7=) 28...Nd6 29.Qg4 Rb7 30.Qf4 Ne8 (30...Nc4 31.Rcb1 Qc7 32.Rb7 Qb7 33.Ra4=) 31.h5 (31.c4 Qc7 32.Qg4 Qb6+=) 31...g6 (31...Qc7 32.Qh4=) 32.Qh4 (32.c4 gh5 33.cd5 cd5+=) 32...Kg7 (32...Rb3 33.c4 gh5 34.cd5 cd5 35.Rc5=) 33.hg6 (33.h6!? Kf8 34.Qh2+=) 33...hg6= (33...fg6? 34.Rf1 h5 35.gh6 Kh7 36.Qg5+–) 34.Rc2 Nd6?? (34...Qb5 35.Rca2 Qd3 36.Qf4 Rb1 37.Kh2 Ra1 38.Ra1+=) 35.Kf2 (better is 35.Qh6 Kg8 36.g4+–) 35...a3?? (35...Kf8 36.Qf4 Ke7 37.Qf6 Kd7 38.c4 dc4 39.Rca2+=) 36.Rh1 (36.Qh6 Kg8 37.Rh1 f5 38.Qh8 Kf7 39.Rh7 Ke6 40.Qf6) 36...Kf8–/+ 37.Qh8 Ke7 38.Qf6 Kd7 39.Rh8?? (better is 39.Ra1–/+) 39...Rb2–+ 40.Rb2 ab2 41.Rh1 Qc3 (better is 41...Qa2!? 42.Kg3 b1Q 43.Rb1 Qb1 44.Qf2–+) 42.Kg3 Qe3 43.Kh2 Qd3 44.Qf2 (44.Qf1 Nf5 45.Qb1 Qg3 46.Kg1 Nh4 47.Rh4 Qe3 48.Kh2 Qc1–+) 44...b1Q 45.Rb1 Qb1 46.Qd2 Qd3 47.Qa2 Qd4 48.Qa7 0–1. Eries – Kevin the fruitbat, ChessWorld.net, 2009.

4.c3 Bd6 5.Qg4 g6 6.Nf3 Nf6 7.Qh4 ed4 8.ed4.

4.Bc4 g6–/+ 5.Qf3 (5.Qe2 d5 6.Bb3 Bb4–/+) 5...d5 6.Qg3 Bd6 7.Bb2 (7.Be2 e4 8.f4 Bb4–/+) 7...f6 (7...dc4!? 8.Be5 Ke7 9.Qh4 f6 10.Bd6 Qd6 11.Qc4 Be6–/+) 8.Bb3+= Bf5 9.a4 (9.b5 Nd7+= (worse is 9...cb5 10.Bd5 e4 11.Qh4+=)) 9...e4 (worse is 9...Bb4 10.Be5 Na6 11.Ne2+=) 10.Qh4 g5 (10...Bb4 11.Ne2–/+) 11.Qh5 Bg6 12.Qg4 f5 (12...Bb4 13.Nh3 h6 14.0-0–/+) 13.Qe2 White prepares the advance b5 13...Nf6 14.Nh3 Bh5?? (14...h6 15.b5+=) 15.Qf1?? (better is 15.Bf6 Be2 16.Bd8+–) 15...Rg8–/+ 16.b5 c5 (16...Nbd7 17.a5 a6 18.bc6 bc6 19.Ba4–/+) 17.c4+= Be7 (17...g4 18.Ng1+=) 18.Nc3 (18.cd5!? Bd6 19.d3+=) 18...d4+= 19.ed4 (19.Nd5 Nd5 20.cd5 Bd6+=) 19...Qd4 (19...cd4 20.Nd5 Bc5 21.Bd1+=) 20.Nd1 Qd3 (20...Qd7 21.a5+=) 21.Qd3= ed3 22.Ne3 f4 23.Nd5 (23.Nf5!? Bg4 24.Nh6=) 23...Nd5+= 24.cd5 Nd7?? (better is 24...Bd6=) 25.d6!+– Bf6 (25...Bd6 26.Bg8 Discovered attack) 26.Bg8 (26.Bf6!? Nf6 27.Bg8 Ng8 28.Ng5 Kd7 29.Nh7 Re8 30.Kf1 Be2 31.Kg1 Bh5+–) 26...Bb2+/– 27.Rb1 Be5 (27...0-0-0!? 28.Bh7 Re8 29.Kf1 Be2 30.Kg1 Bf6+/–) 28.Bh7+– g4 29.Ng5 c4 30.h3 c3? (30...g3 31.Rc1 gf2 32.Kf2 c3 33.dc3 d2+–) 31.Bd3 cd2 (31...Nc5 32.Bf5 g3 33.fg3 fg3 34.dc3 Na4 35.0-0 Nc3 36.Rfe1 Ne2 37.Kf1 Bd6 38.Bd3+– (worse is 38.Re2 Be2 39.Ke2 Ke7+–)) 32.Kd2 f3 (32...g3 33.fg3 fg3 34.Rb4 Bd6 35.Rh4+–) 33.g3 (33.hg4 Bf4 34.Kd1 Bg5 35.Rh5 fg2+–) 33...0-0-0 (33...Bd6 34.hg4 Bg4 35.Rh8 Nf8 36.Rh4+–) 34.hg4 Bg4 35.Nf7 (better is 35.Rb4!? Nc5 36.Rc4 Bd6+–) 35...Rf8 36.Rh7 (36.Rbc1 Kb8 37.Ne5 Ne5+–) 36...Bd4 (36...Bf6 37.Re1 Kb8 38.Rc1+–) 37.Rc1 (37.Rb4!? Be6 38.Rd4 Rf7 39.Rh8 Rf8 40.Rf8 Nf8+–) 37...Kb8 38.Nh6 (38.Rh4 Bb2 39.Rc2 Ba3 40.Rg4 Rf7 41.Rg8 Rf8 42.Rf8 Nf8+–) 38...Be6 (38...Bh3 39.Be4 b6 40.Rc7+–) 39.Re7 Bh3 (39...Nc5 40.Rc5! Bc5 41.Re6 Bf2 42.Nf5+–) 40.Bf5! Bf6 (40...Rf5 41.Re8 Mate attack; 40...Bf5 41.Nf5 Combination) 41.Bh3 (41.Bh3 Bg5 42.Kd1+–) 1–0. Baer,Horst Hugo – Hermann,G, corr DDR, 1985.

4.d4 Nf6 5.Qg5 Nbd7 6.c3 (6.Nd2 e4+=) 6...Qc7 7.Nf3 (7.f3 d5–/+) 7...e4 8.Nfd2 d5 9.a4 (9.Qg3 Qg3 10.hg3+=) 9...Be7 (better is 9...a5!?–/+) 10.Qg7= Rg8 11.Qh6 Rg6 12.Qh4 (12.Qf4!? Qd8 13.h3=) 12...Nf8 13.Na3 (13.Qf4 Bd6 14.Qh4 Ng4–/+) 13...Rg4 (13...Qd8!? 14.h3 Ng4–/+) 14.Qh6+= Ng6 15.g3 Nh4 16.gh4? (better is 16.Nc2!?=) 16...Rg6–/+ 17.Qf4 Bd6 18.Qg5 (18.h5 Bf4 19.hg6 Bh2–/+) 18...Rg5 (18...h6!? 19.Qg6 fg6 20.Rg1–+) 19.hg5–/+ Ng4 20.h4?? (better is 20.Be2–/+) 20...Bh2 (20...Bg3 21.Ne4 de4 22.Bc4 Bf2 23.Kd1–+) 21.Be2 (21.Bg2 Bg3 22.Ne4 de4 23.Ra2–+) 21...Nf2 22.Rf1 Bg3 (better is 22...Qg3 23.Nb3 Nd3 24.Kd1–+) 23.Rf2 Bf2 24.Kf2 Qh2 25.Ke1 Qh4 26.Kd1 Qg5 27.Nb3 Bg4 28.Ra2 (28.Bg4 Qg4 29.Kc2 h5–+) 28...0-0-0 29.Nc5 (29.Rb2 Rg8 30.Bg4 Qg4 31.Kc2 h5–+) 29...h5 (29...Bf3 30.Bf3 ef3 31.Nd3 Qg1 32.Kc2–+) 30.b5 h4 31.bc6 bc6 32.c4 (32.Ke1 Be2 33.Re2 Qg1 34.Kd2–+) 32...h3 (32...h3 33.Bg4 Qg4 34.Kc2 h2–+) 0–1. mtrc – myapples, internet, 2002.

4.d4 Nf6 5.Qg5 e4 6.Nc3 d5 7.a3 g6 (better is 7...h6 8.Qg3 Bd6–/+) 8.Nge2? (8.f3 Be7 9.Qg3 ef3 10.Nf3 Rf8=) 8...Bg7?? (better is 8...Be7 9.Nd5 cd5–+) 9.Qe5+= Be6 10.Nf4 Qe7 11.Ne6 fe6 12.h3 (12.Qg5 0-0+=) 12...0-0 13.Qf4 (13.Qg5 Qf7+=) 13...Nh5–/+ 14.Qg4 (14.Qh2 e5 15.Ne2 Nd7–/+) 14...e5 15.Ne2 Qf7 16.f4 ef3 17.Qf3? (17.gf3 Qf3 18.Qf3 Rf3–/+) 17...Qe7 (17...Qe8!? 18.Qg4 Nf6 19.Qg3–+) 18.Qg4 Nd7 (18...ed4 19.Rb1 Nd7 20.ed4 Bd4 21.Rb3–+) 19.Bd2 (19.c3 Rf5 20.h4 Nhf6–+) 19...Rae8 20.0-0-0 a5! 21.Kb1 (21.ba5 Qa3 Pinning (21...Qa3 Deflection)) 21...Ndf6 22.Qg5 Qc7 23.Kc1? (better is 23.Qh4 Ne4 24.Be1–+) 23...Ne4 24.Qh4 Nf2 25.g4 Nh1 (25...Nd1?! 26.gh5 Nf2 27.hg6 hg6 28.Rg1–+) 26.gh5 Nf2 (better is 26...Bf6 27.Qg4 Nf2 28.Qg2 Nd1 29.Kd1–+) 27.hg6 hg6 28.Re1 Ne4 29.Bg2 Nd2 30.Kd2 ab4 31.ab4 Qe7 (31...ed4 32.Nd4 Qd6 33.Ne2–+) 32.Qe7 Re7 33.e4 (33.de5 Rf2 (worse is 33...Be5 34.Bh1–+) 34.Rg1 Re5–+) 33...Rf2 34.Bh1 ed4 35.ed5 Bh6 (35...Re3 36.dc6 Bh6–+) 36.Kd1 (36.Kd3 Re3 37.Kd4 Rfe2 38.Re2 Re2 39.dc6 bc6 40.Bc6 Rc2–+) 36...Rh2 (36...Re8 37.Rg1 Kh7 38.Nd4 Rd2 39.Kc1 Rd4 40.Kb2 Rb4 41.Kc3 c5 42.Rg4 Re3 43.Kd2 c4 44.Rg5 Bg5 45.c3 Rb2 46.Kc1 Ree2 47.Kd1 Rbd2 48.Kc1 Re1) 37.dc6 (37.Bf3–+) 37...Ree2 (better is 37...bc6 38.Rg1 Ree2 39.Rg6 Kh7–+) 38.Bd5+/– Kg7 39.Re2 Re2 40.Ke2 bc6 41.Bc6 Kf6 42.b5 Ke5 43.Kd3 Bg7 44.b6 Kd6 45.Be4 g5 (45...Bf6 46.Kc4 (worse is 46.Bg6 Kc6+/–) 46...g5 47.Kb5+–) 46.b7 (46.Ba8!? Kc5 47.b7 Be5+–) 46...Kc7+/– 47.Kc4 Bh8 48.Kc5 (48.Bc6 Be5 49.Bd5 Bh8+/–) 48...Bg7 49.Kb5 Be5 50.Kc5 Bg7 51.Bf3 Bh8 52.Bd5 (52.Kc4 Kb8+–) 52...Bg7 53.Bc6 Bh8? (better is 53...Be5+/–) 54.Be4?? (better is 54.Kd5!? Bg7+–) 54...Bg7 55.Kc4 (55.Bg2 Bh8+/–) 55...Bh8+/– 56.Kd3 Bg7 57.Ke2 (57.Bd5 Bf6+/–) 57...Be5 (57...Bf8 58.Kf3 Bb4 59.Kg4+/–) 58.Kf3 Bf6 (58...Kb8 59.Bc6+/–) 59.Kg4 Bd8 60.Kf5 Be7? (better is 60...Kb8+/–) 61.Ke5+– Bc5 62.Kf6 d3 63.cd3 Be3 64.Ke5 (64.d4 Bf4+–) 64...Bc1 65.Kd4 (65.d4 Be3+–) 65...Bd2 66.Kc4 Bf4 67.Kd4 Bd2 68.Bf3 Bf4 (68...Be1 69.Ke5+–) 69.Kc3 (69.Bd5 Bd6+–) 69...Be3 (69...Bd6 70.Be4+–) 70.d4 Bf4 71.Be4 Be3 (71...Kb6 72.Kd3+–) 72.Kd3 Bf4 (72...Bf2 73.Bc6!+–) 73.Kc4 (73.Bd5 Bg3+–) 73...Be3 (73...Bd6 74.Kb5 Bf4 75.Ka6+–) 74.Kc5 (74.Bc6! Bf4 75.d5 Kd8+–) 74...Bf4 75.Bc6 Be3 (75...Bd6 76.Kb5 Bg3+–) 76.Kd5 (better is 76.Kc4+–) 76...Bf4+/– 77.Kc5 Be3 78.Be4 (78.Kc4!? Bf4 79.d5 Kd8+–) 78...Bf4 79.Kc4 Be3 80.Kd3 Bf4 81.Ke2 (81.Bd5 Kb8+–) 81...Bc1 (81...Bd6 82.Kf3+–) 82.Kf3 Bd2 (82...Kb8 83.Bc6+–) 83.Kg4 (83.Bc6 Bc3 84.Ke4 Bb4+–) 83...Be3 84.Kf5 Bd2 (84...Kb8 85.Bc6 Bd4 86.Kg5 Be3 87.Kh5+–) 85.Ke6 (better is 85.Bc6! Kb8+–) 85...Be3 86.d5 (86.Kf6!? Bf4+–) 86...Kb7 87.d6 Kc8 88.Ke7 Bc5 89.Bc6 Bb4 90.Bd7 Kb7 91.Be6?? (better is 91.Bf5+–) 91...Kc6= 92.Bd7 Kb7?? (better is 92...Kd5=) 93.Bb5 Kb6 94.Be8 Kb7 95.Ke6 (better is 95.Bh5!? Bc5+–) 95...Kc8+/– 96.d7 Kd8 97.Kf5 Bd2 98.Kg4 ½–½. mtrc – myapples, internet, 2002.

4.d4 Nf6 5.Qg5 h6 6.Qg3 e4 7.f3 –/+.

4.e4 Nf6 5.Qe2 Be7 =+.

3.a3 d5 4.Nf3 Nd7 5.c4 Bd6 6.Bb2 Ngf6 7.c5 (---> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6 7.c5).

3.b5 d5 4.c4 Nf6 5.a4 Be7 6.Bb2 Nbd7 7.Nf3 c5 8.Be2 b6 9.0-0 0-0 10.Na3 Bb7 11.cd5 ed5 12.Nb1 Rc8 (12...Re8 13.Re1+=) 13.d4 (13.a5 ba5 14.Qa4 Qb6=) 13...c4+= 14.Nc3 Ne4 15.Ne4 (better is 15.Qc2!? Qc7 16.Rfc1+=) 15...de4–/+ 16.Ne1 c3 17.Ba3 Nf6 18.Nc2 Nd5 19.Qb1 Ba3 (19...Re8 20.Be7 Re7 21.Qb3–/+) 20.Ra3 Qd6 21.Qb3 Rc7 22.Bc4 (22.a5 Nf6+=) 22...Rfc8–/+ 23.Bd5 (23.Be2 Rd8–/+) 23...Bd5–+ (23...Qd5?! 24.Nb4 Qb3 25.Rb3=) 24.Qb4 Qb4 (better is 24...Qe6–+) 25.Nb4= c2 (25...Bb7 26.Rc1 Rc4 27.Rb3=) 26.Rc1 Be6 27.d5 (better is 27.Nc6!?=) 27...Bd5!–/+ 28.h3 (28.Nd5 Rd8 Decoy) 28...Rd7 (better is 28...Rc5!?–+) 29.Kh2 Be6 30.Nc6? (30.Rc2 Rc2 31.Nc2 Rd3=) 30...Rdc7 (better is 30...Rc6 31.bc6 Rd3–+) 31.Rc2= Bd5?? (31...Kf8 32.Kg3=) 32.Rac3 (better is 32.Ne7! Kf8 33.Rc7 Rc7 34.Nd5+–) 32...Kf8= 33.Kg3 f5 (33...g5 34.Rc1=) 34.Kf4+= g6 35.Ke5 Rd7 36.Na7?? (better is 36.Nd4 Re8 37.Kf4+=) 36...Re8–+ 37.Kf6 Ra7 38.Rc7 Rc7 (38...Ra4?! 39.Rh7 Re6 40.Kg5–+) 39.Rc7 Re6 40.Kg5 h5 (40...Re7!? 41.Rc8 Kf7 42.Rd8–+) 41.Rd7 Bb3 42.Rd4 (42.Ra7 Bc4–+) 42...Kf7 (42...Ke7!? 43.Rb4 Bd5 44.Rb1–+) 43.Rd7 Re7 (43...Ke8 44.Ra7–+) 44.Rd4? (better is 44.Rd6!?+=) 44...Rc7 (better is 44...Ba2–+) 45.f3? (45.Rd6 Rc2 46.Rg6 Rf2 47.Rb6 Ba4 48.Rf6 Ke7 49.Rf5 Rf5 50.Kf5 Bb5 51.g4 hg4 52.hg4–+) 45...ef3 (45...Rc2!? 46.fe4 fe4 47.g3–+) 46.gf3 Rc3 47.a5? (47.Rd7 Ke8 48.Rd6 Re3 49.Rg6 Rf3 50.Rb6 Ba4 51.Kh5 Rh3 52.Kg5–+) 47...ba5 48.b6 Rc8 (48...Re3 49.Rd7 Ke8 50.b7 Kd7 51.b8Q+=) 49.Rd7 Ke8 (better is 49...Ke6!? 50.Ra7 a4 51.Kg6–+) 50.Ra7 Rb8 51.b7 (51.Kg6 a4–+) 51...Bd5 (better is 51...Kf7!? 52.Ra5 Rb7 53.Ra6–+) 52.Ra5 Bb7 (52...Bf3 53.Kg6 Rb7 54.Kf5–+) 53.Rb5? (53.e4 fe4 54.fe4 Kf7–/+) 53...Kf7 (better is 53...Kd7!?–+) 54.e4 (54.Rb6!?+=) 54...fe4 55.fe4 Ke7 (better is 55...Ke6!?–/+) 56.Rb6= Kf7 57.e5 Attacks the backward pawn on g6 57...h4 58.Rf6 (58.Kh4 Rh8 Skewer) 58...Ke7 59.Rb6 ½–½. Nikolic,Jovane (1685) – Tamarozi,Isaque, 7th Sao Bernardo do Campo LXSBC op, 2011.

3.b5 Ne7 4.Nf3 Nd5 5.bc6 dc6 6.c4 Nb6 7.d4 Bb4 8.Bd2 Bd2 (8...Be7 9.Bd3=) 9.Nbd2 (worse 9.Kd2 c5=) 9...0-0 10.Bd3 g6 (10...c5 11.Qc2 h6 12.dc5+=) 11.0-0 N8d7 12.a4 e5? (better 12...Nf6+–) 13.a5+– (13.de5?! Nc5 14.Be2 Qe7+=) 13...ed4 14.ab6 (better 14.ed4!? Re8+–) 14...de3 15.Ne4 (15.fe3!? Nb6 16.Qc2 Qe7+–) 15...ef2 16.Rf2 (16.Kf2?! Qb6 17.Ke2 f5=; 16.Nf2?! Qb6 17.Qd2 a5+–) 16...Nb6 17.Rfa2 (17.c5 Nd5+–) 17...Bf5+– 18.c5 (18.Qb1 Be4 19.Be4 Qd6+–) 18...Be4+= 19.Be4 Qd1 20.Rd1 Nc4 (20...Nc8!?+=) 21.Rd4 Ne3 22.Ra3 Ng4 (better 22...f5 23.Re3 Rae8+–) 23.Rda4?? (better 23.Bc6!? bc6 24.Rg4 Rfb8+–) 23...Rfd8 (23...Nf6 24.Bd3 Nd7 25.Ra7 Ra7 26.Ra7 Nc5 27.Bc4=) 24.g3 (better 24.Bc2!? h5 25.h3+–) 24...Rd1 25.Kg2 Re8 0–1. vknyus – giraira, gameknot.com, 2013.

3.c3 d5 4.Nf3 Bd6 (4...Nf6 5.d4=) 5.Bb2 (5.d4 Nf6=) 5...Nf6=+ 6.d4 (6.Be2 0-0=+) 6...0-0 7.Bd3 Nbd7 8.0-0 e5 9.de5 Ne5 10.Ne5 Be5 11.Nd2 Bg4 (11...Qc7 12.h3=+) 12.Qc2 Qe7 13.e4 (13.c4 dc4 14.Nc4 Bb2 15.Qb2 Rad8=+) 13...Qd6 14.g3 (14.h3 Rfd8=+) 14...Rad8–/+ 15.ed5 (better is 15.f4!? de4 16.Ne4 Qd3 17.Qd3 Rd3 18.Nf2=+) 15...Qd5–+ Opening the d–file gets Black a lot of play. (15...cd5?! 16.Rfe1=+) 16.Nc4 Bh3 The mate threat is Qg2 (16...Qd3?! 17.Qd3 Rd3 18.Ne5=+) 17.f4 Bf1 18.Bf1 Bc7 19.Qf2 Rfe8 (19...b5 20.Ne3 Qe6 21.f5–+) 20.Qa7–/+ Ng4 21.Qc5 (21.a4!?–/+) 21…Qf3–+ (22.Qh5 b5–+) 0–1. Flazinski,Pawel – Luzuriaga,Norberto Horacio, corr or01–014 E–mail, 2002.

3.c3 e5 4.Nf3 e4 5.Nd4 =.

4.a4 Bb4 5.ab5 a6 6.Bb2 Nf6 7.Ra4=.

4.a4 Bb4 5.ab5 cb5 6.Bb5 Nf6 (6...Bb7 7.Nf3=) 7.Qf3 0-0?? (better 7...Nc6=) 8.Qa8+– Nc6?? (8...Qb6 9.Bb2 Qb5 10.Bf6 Ba6 11.Ra6 Na6+=) 9.Bc6 dc6 10.Qa7 Nd5 (10...e5 11.Ba3 c5 12.Nf3+–) 11.Nf3 Qd6 (11...e5 12.Bb2 f6 13.e4+–) 12.c3 Bc5 13.Ba3 Nb6 (13...Ba3 14.Qa3 Qc7+–) 14.Qb6! Bb6 15.Bd6 Bb7 (15...Rd8 16.Ne5 Rd6 17.Nc4+–) 16.Bf8 (16.Bf8 Kf8 17.Ne5+–) 1–0. pcmvr – pvhameren, net–chess.com, 2017.

4.a4 Bb4 5.ab5 Nf6 6.Bb2 (6.Ba3 Ba3 7.Na3 a6=) 6...Bb7 (6...cb5 7.c3 Bc5 8.d4=) 7.Nf3 (7.Ra4 Qe7 8.Bf6 gf6=) 7...0-0 8.bc6 (8.Ra4 Be7=) 8...Nc6=+ 9.Be2 d6 10.0-0 Rb8 11.c3 (11.Nc3 e5=) 11...Ba5 (11...Bc5 12.d4 Qb6 13.Bc1+–) 12.Qc2 (12.Na3 Qc7=) 12...Bb6 (12...Ne5 13.Ne5 de5 14.d4=) 13.d3 Re8 14.Nbd2 a5 (14...Qc7 15.Rfb1=) 15.Ba3 (15.Rfb1 Qc7=) 15...Ba6 (15...d5 16.Rfb1=) 16.Rfb1 Qc7 17.c4 Rec8 18.d4 Ne7 (18...Rb7 19.Ne4 Ne4 20.Qe4=) 19.Rb2 (19.Ne4 A) 19...Bc4? 20.Bd6 (20.Nd6?! Be2 21.Qe2 Qc2+=) 20...Ne4 21.Bc7 Be2 22.Ra5+– (< 22.Rb6 Rb6 23.Qe4 Rc7+–); B) 19...Ne4 20.Qe4 Nf5= (< 20...Bc4 21.Bc4 Qc4 22.Bd6+/–)) 19...Qc6 (19...Bb7 20.e4=) 20.Bd3 (20.Rab1 Bc7+=) 20...Bc7 (20...Bb7 21.Rab1 Bc7 22.e4+=) 21.Rb8= Rb8 22.e4 Ng6 23.e5 de5 24.Bg6 hg6 25.Ne5 Be5 26.de5 Nd5 (26...Bb7 27.f3 Nd5 28.Qd3 Qb6 29.c5=) 27.Qe4 Nb4 28.Bb4 Qe4 29.Ne4 Rb4 30.f3 ½–½. Woelfelschneider,Peter – Wittal,Werner, T16–02 TSC, 2002.

4.a4 Qf6 5.c3=.

4.Bb2 e5 5.Nc3 (5.d4 e4+= (5...d6 6.Bd3 Be6 7.Nf3 a5 8.b5 Nd7) 6.d5 d6 7.Nc3 Qe7 8.b5 Bd7) 5...d5= 6.Nf3 a6 (6...b5 7.a4 Bb4 8.ab5 a6) 7.Be2 Bg4 (7...b5 8.e4= (8.0-0 a5) 8...d4) 8.0-0 Bf3 (8...Nh6 9.e4=) 9.Bf3+= (9.gf3?! Bd6=) 9...e4 (9...Bd6 10.Bh5 g6 11.Be2+=) 10.Bg4 g6 (10...Nh6 11.Bh5 g6 12.Be2+/–) 11.Ne2 (11.f3 ef3 12.Bf3 Bd6+=) 11...h5 12.Be6 Nh6 (12...Bd6 13.f3 Qc7 14.Kh1+/–) 13.c4 (better is 13.Nf4 Rh7 14.Ng6+–) 13...Qe7? (better is 13...Bd6+/–) 14.Bh3?? (better is 14.cd5 Nf7 15.f3 ef3 16.Bf6 Qf6 17.Rf3+–) 14...dc4 (14...g5 15.f3 ef3 16.gf3 dc4 17.Qc2=) 15.Qc2 (better is 15.Nf4 Rg8 16.Be6+/–) 15...Bg7?? (15...g5 16.g3 (worse is 16.Qc4 g4–/+) 16...Bg7 17.Qc4=) 16.Rad1?? (better is 16.Nf4 Rg8 17.Ng6+–) 16...f5 (16...g5 17.g3 (worse is 17.Qc4 b5 18.Qc2 g4–/+) 17...b5 18.f3=) 17.Nf4 (17.Bg7 Qg7 18.Qc4 Qf6+=) 17...Rg8 (17...Bb2!? 18.Qb2 Rg8–/+) 18.Bg7 (18.Ng6!? Qe6 19.Nf4+/–) 18...Rg7 19.Qc4 b5 (19...Rg8!?=) 20.Qd4 (20.Qc3+/–) 20...g5 (20...a5 21.d3 ab4 22.ab4+/–) 21.Nh5 (better is 21.Ne6 Rg8 22.Bf5 Nf5 23.Qe4+–) 21...Rg8? (better is 21...Rf7!? 22.f3 ef3 23.gf3 a5+/–) 22.g4! Rg6? (22...fg4 23.Nf6; 22...Ng4 23.Bg4) 23.Ng3 (better is 23.gf5 Rd6 24.Qh8 Qf8 25.Ng7 Ke7 26.Qf8 Kf8 27.Ne6 Ke7 28.f6 Kf6 29.Nc7+–) 23...fg4+/– 24.Bg2 Rg8 (24...a5 25.Qh8 Qf8 26.Qf8 Kf8 27.Ne4+–) 25.Ne4+– Nd7? (better is 25...Rg6+–) 26.Nd6 Kd8 27.Bc6 Ra7 (27...Rg6+–) 28.Qa7 Qd6 29.Bd7 Qd7 30.Qb6 Qc7 31.Qh6 Qc2 (31...Qf7 32.Qa6 Qd7 33.Rc1+–) 32.Qf6 (32.Qd6!? Ke8 33.Rc1 Qc4+–) 32...Ke8 33.Qa6 (better is 33.Rc1!? Qc4 34.Rc4 bc4 35.Qe6 Kd8 36.Qg8 Kd7 37.Qg5 Kc7+–) 33...Kf8 34.Qb5 (34.Qf6 Ke8 35.Rc1 Qc4 36.Rc4 bc4 37.Qe6 Kd8 38.Qg8 Kd7 39.Qd5 Kc7 40.Qc4 Kd6 41.a4 g3 42.Qd4 Ke6 43.fg3 Ke7 44.Qe5 Kd8 45.Rf7 g4 46.Qh8) 34...Kg7 35.Qg5 (better is 35.Rc1 Qg6 36.Rc6 Kh6+–) 35...Kf8 36.Qc5 (36.Qc5 Qc5 37.bc5+–) 1–0. leighcastle – Eries, ChessWorld.net, 2009.

4.c4 A) 4...d5 A1) 5.Nc3 a5 (5...Bd6 6.d4 Ne7 7.Nf3 0-0 8.e4 Nd7; 5...Ne7 6.d4 Nf5 7.cd5 ed5 8.Bd3 Be6; 5...e5 6.cd5 cd5 7.d4 a5 8.b5 Ne7; 5...Bd7 6.d4 a5 7.b5 Ne7 8.Rb1 dc4) 6.b5 cb5 7.Nb5 Ne7 8.d4 Nbc6; A2) 5.d4 Bd6 (5...Nh6 6.Nf3 Be7 7.Qc2 a5 8.b5 0-0) 6.Bd3 dc4 7.Qh5 Ke7 8.Bc4 g6; B) 4...Ne7 B1) 5.Bb2 d5 (5...d6 6.d4 e5 7.Bd3 ed4 8.Bd4 Nd7; 5...a5 6.b5 d5 7.Qh5 g6 8.Qf3 Bg7; 5...e5 6.d4 d6 7.Bd3 ed4 8.Bd4 Nd7; 5...Qc7 6.d4 d5 7.Nc3 Nf5 8.Nf3 Be7) 6.d4 a5 7.b5 cb5 8.cd5 ed5; B2) 5.d4 d5 (5...a5 6.ba5 Qa5 7.Bd2 Qc7 8.Qh5 g6; 5...d6 6.Nf3 d5 7.Nc3 Nf5 8.c5 b6) 6.Nf3 Nf5 7.cd5 ed5 8.Bd3 Bd6; C) 4...a5 5.b5 d5 (5...d6 6.d4 f5 7.Nf3 Nf6 8.Nc3 cb5; 5...Nh6 6.d4 d5 7.Nc3 cb5 8.Nb5 Nc6; 5...Ne7 6.d4 d5 7.Nc3 dc4 8.Bc4 Nd5; 5...b6 6.d4 Bb7 7.Nc3 c5 8.Nf3 Qc7) 6.d4 Ne7 7.Nc3 dc4 8.Bc4 Nd5.

4.d4 A) 4...a5 5.b5 (5.ba5 Qa5 6.Bd2 Qc7 7.Bd3 d5 8.c4 Ne7) 5...d5 (5...Ne7 6.Bd3 d5 7.Nc3 cb5 8.Nb5 Nf5; 5...Qb6 6.Bd3 cb5 7.Qh5 Kd8 8.Qb5 Qb5) 6.Bd3 Ne7 7.Nc3 cb5 8.Nb5 Nf5; B) 4...Ne7 B1) 5.c4 d5 (5...a5 6.ba5 d5 7.Bd2 e5 8.de5 fe5; 5...d6 6.Bd3 a5 7.b5 cb5 8.cb5 Nd7) 6.Nf3 Nf5 7.cd5 ed5 8.Bd3 Be6; B2) 5.Bd3 a5 (5...d5 6.Nf3 a5 7.ba5 Qa5 8.Qd2 Nd7; 5...Nf5 6.Nf3 d5 7.0-0 a5 8.ba5 Qa5; 5...d6 6.Nf3 a5 7.b5 cb5 8.0-0 b6) 6.ba5 Qa5 7.Bd2 Qg5 8.Qf3 e5; B3) 5.Be2 d5 (5...a5 6.b5 d5 7.Nf3 cb5 8.Bb5 Bd7; 5...e5 6.Bd3 d6 7.Nf3 a5 8.b5 cb5; 5...b5 6.a4 Ng6 7.Bd2 ba4 8.Bd3 Ba6) 6.Nf3 a5 7.ba5 Qa5 8.Bd2 Qc7; B4) 5.Nf3 a5 (5...d5 6.Bd3 a5 7.b5 cb5 8.Nc3 b4) 6.b5 d5 7.Nc3 Nd7 8.Be2 Qc7; C) 4...d5+= C1) 5.c4 Bd6 (5...Nh6 6.Nf3 Bd6 7.c5 Bc7 8.Bd3 e5) 6.Bd3 dc4 7.Qh5 Ke7 8.Bc4 g6; C2) 5.Nf3 b5 (5...Bd6 6.c4 Nd7 7.Nbd2 Ne7 8.Bd3 e5; 5...a5 6.b5 Bd6 7.c4 dc4 8.Nc3 Ne7; 5...Nd7 6.c4 Bd6 7.Bd3 dc4 8.Bc4 Nb6) 6.Bd2 Bd6 7.a4 ba4 8.Ra4 Nd7; C3) 5.Nd2 Bd6 (5...Nh6 6.Ngf3 b5 7.Nb3 Bd6 8.Bd3 0-0; 5...a5 6.b5 Bd7 7.bc6 Nc6 8.Rb1 Ra7; 5...Ne7 6.Ngf3 a5 7.b5 Bd7 8.Rb1 cb5) 6.Bd3 Ne7 7.Qh5 g6 8.Qh6 e5; C4) 5.Bd3 Ne7 (5...Nh6 6.Nf3 Bd6 7.e4 Nf7 8.0-0 0-0; 5...g6 6.Nf3 Bd6 7.0-0 a5 8.ba5 e5) 6.Nf3 a5 7.ba5 Qa5 8.Qd2 Nd7.

4.Bb2 d5 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

4.Nc3 Be7 5.Nf3 0-0 6.Be2 d6 7.0-0 Re8 8.e4 e5 9.d4. pierre (2095) – Sergey Biryukov, internet, 2012.

4.c4 d5 5.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 e6 5.a3).

4.Nf3 a5 5.b5 A) 5...Be7 6.Bb2 (6.Nc3 0-0 7.Bd3 d5 8.Bb2 Nbd7 9.0-0 Nc5 10.Ne5) 6...0-0 7.Nc3 d5 8.Be2 Qc7 9.0-0 Nbd7 10.bc6; B) 5...Bc5 6.d4 (6.Nc3 d5 7.d4 Bd6 8.Bd3 0-0 9.0-0 Nbd7 10.a4) 6...Be7 7.Nc3 0-0 8.Bd3 cb5 9.Nb5 d5 10.0-0; C) 5...d5 6.Nc3 (6.Bb2 Bd6 7.Nc3 0-0 8.Be2 Nbd7 9.0-0 Qc7 10.g3) 6...Bd6 7.Be2 0-0 8.0-0 Qc7 9.g3 Nbd7 10.Bb2.

4.Nf3 b5 5.a4 A) 5...a6 6.Nc3 (6.ab5 Bb4 7.Nc3 Bb7 8.Rb1 Qa5 9.b6 d5 10.Bd3) 6...Bb7 7.Bd3 Bb4 8.0-0 d6 9.Rb1 Qa5 10.Ne4; B) 5...Bb7 6.Nc3 (6.ab5 cb5 7.Bb5 Nc6 8.Nc3 Nb4 9.0-0 a6 10.Be2) 6...a6 7.Na2 d5 8.Ba3 Bd6 9.Bd3 Nbd7 10.Nc3; C) 5...Bb4 6.ab5 cb5 7.Nc3 Nc6 8.Bb5 Qb6 9.Rb1 a5 10.Bd3.

4.Nf3 c5 A) 5.b5 A1) 5...Be7 6.Nc3 (6.Bb2 d5 7.Nc3 0-0 8.Bd3 Nbd7 9.0-0 e5 10.Bf5) 6...0-0 7.Bb2 d5 8.Be2 Bd6 9.0-0 Nbd7 10.a4; A2) 5...d5 6.Nc3 (6.Bb2 Nbd7 7.Be2 Bd6 8.Nc3 0-0 9.0-0 e5 10.d3) 6...Nbd7 7.Bb2 e5 8.Ne2 Bd6 9.Ng3 0-0 10.Nf5; B) 5.Nc3 B1) 5...d5 6.Rb1 (6.bc5 Bc5 7.d4 Be7 8.Bd3 Nc6 9.0-0 0-0 10.Re1) 6...Nc6 7.b5 Na5 8.g3 Bd6 9.d3 0-0 10.Bg2; B2) 5...cb4 6.ab4 (6.Nb5 Nc6 7.Be2 a6 8.ab4 Bb4 9.0-0 0-0 10.c3) 6...Bb4 7.Bd3 Nc6 8.Ba3 0-0 9.0-0 a5 10.Qe2; C) 5.Bb2 C1) 5...d5 6.bc5 (6.Bd3 cb4 7.ab4 Bb4 8.0-0 0-0 9.c4 Nbd7 10.Qc2) 6...Bc5 7.Bd3 0-0 8.c4 Nbd7 9.Qc2 dc4 10.Bc4; C2) 5...cb4 6.c3 (6.ab4 Bb4 7.Nc3 Nc6 8.Bb5 0-0 9.0-0 a5 10.Qe2) 6...b3 7.Qb3 Qa5 8.c4 Be7 9.Nc3 0-0 10.Bd3; D) 5.bc5 D1) 5...Qa5 6.Be2 (6.Nc3 Nc6 7.Rb1 a6 8.Nd4 Qc5 9.Na4 Qa5 10.Nb6) 6...Nc6 7.0-0 Bc5 8.d4 Bb4 9.Bd2 Bd2 10.Qd2; D2) 5...Bc5 6.Nc3 (6.Bd3 Nc6 7.c4 0-0 8.Nc3 d5 9.0-0 dc4 10.Bc4) 6...0-0 7.Bb2 d5 8.Bb5 Nc6 9.0-0 Bd7 10.Qe2.

4.Nf3 d5 A) 5.Bb2 A1) 5...Nbd7 6.Nc3 (6.Be2 a5 7.b5 Bd6 8.Nc3 0-0 9.0-0 Qc7 10.g3) 6...a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3; A2) 5...c5 6.b5 (6.bc5 Bc5 7.Nc3 0-0 8.d4 Be7 9.Bd3 Nc6 10.0-0 ) 6...Nbd7 7.Be2 Bd6 8.0-0 0-0 9.h3 e5 10.d3; A3) 5...a5 6.b5 (6.Nc3 ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Be2 Nbd7 10.0-0) 6...Nbd7 7.Nc3 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3; B) 5.Bd3 B1) 5...a5 6.b5 (6.ba5 Nbd7 7.Nc3 Qa5 8.0-0 Bd6 9.Bb2 e5 10.Nh4) 6...Bd6 7.Bb2 Nbd7 8.0-0 0-0 9.Nc3 Nc5 10.Be2; B2) 5...Nbd7 6.Bb2 (6.Nc3 a5 7.b5 Bd6 8.a4 e5 9.Be2 c5 10.d3) 6...a5 7.b5 Bd6 8.Nc3 Nc5 9.0-0 Nd3 10.cd3; C) 5.Nc3 C1) 5...c5 6.Rb1 (6.bc5 Bc5 7.d4 Be7 8.Bd3 Nc6 9.0-0 0-0 10.Re1) 6...Nc6 7.bc5 Bc5 8.d4 Be7 9.Bd3 b6 10.0-0; C2) 5...Nbd7 6.Be2 (6.Bb2 a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.g3) 6...Bd6 7.0-0 0-0 8.Bb2 a5 9.b5 Qc7 10.g3; C3) 5...a5 6.b5 Bd6 7.Be2 0-0 8.0-0 Qc7 9.g3 Nbd7 10.Bb2.

4.Nf3 Be7 5.d4 (5.Nc3 A) 5...a5 6.Bb2 (6.b5 0-0 7.a4 d5 8.Bd3 Nbd7 9.0-0 e5 10.Be2) 6...0-0 7.b5 d5 8.Be2 Nbd7 9.0-0 Qc7 10.Na4; B) 5...d5 6.Bb2 (6.Bd3 Nbd7 7.0-0 e5 8.Be2 0-0 9.Bb2 Qc7 10.h3) 6...Nbd7 7.Bd3 e5 8.Be2 0-0 9.0-0 Qc7 10.h3; C) 5...0-0= 6.Bd3 (6.Bb2 a5 7.b5 d5 8.Be2 Qc7 9.0-0 Nbd7 10.bc6) 6...a5 7.b5 d5 8.Bb2 Nbd7 9.0-0 Nc5 10.Qe2; 5.Bb2 A) 5...a5 6.Nc3 (6.b5 0-0 7.Bd3 cb5 8.Bb5 Nc6 9.Nc3 d5 10.0-0) 6...ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Bd3 Na6 10.Ne4; B) 5...0-0 6.Nc3 (6.Bd3 a5 7.b5 cb5 8.Bb5 Nc6 9.Nc3 d5 10.0-0) 6...a5 7.b5 d5 8.Be2 Nbd7 9.0-0 Qc7 10.Na4; C) 5...d5 6.Bd3 Nbd7 7.0-0 0-0 8.Qe2 a5 9.Nc3 e5 10.e4) 5...d5 (5...a5 6.b5 (6.ba5 d5 7.Bd2 0-0 8.Bd3 c5 9.dc5 Bc5 10.0-0) 6...0-0 7.Nc3 cb5 8.Nb5 d5 9.Bd3 Bd7 10.0-0; 5...0-0 6.Nc3 (6.Bb2 a5 7.c3 d5 8.Bd3 Nbd7 9.Nbd2 b6 10.0-0) 6...a5 7.b5 cb5 8.Nb5 d5 9.Bd3 Bd7 10.0-0) 6.c4 (6.Nc3 0-0 7.Bd3 a5 8.b5 cb5 9.Nb5 Bd7 10.0-0) 6...a5 (6...0-0 7.Nc3 Nbd7 8.cd5 Nd5 9.Nd5 ed5 10.Bd3) 7.b5 0-0 8.Nc3 Nbd7 (8...cb5 9.cb5 Nbd7 10.Bd3) 9.Bb2 (9.Bd2 Qc7 10.bc6) 9...c5 (9...Ne4 10.cd5) 10.cd5 ed5 11.Be2 c4 12.0-0 Bd6 13.Nd2 Nb6 14.e4 de4 15.Nce4 Be6 16.Nd6 Qd6 17.d5 Qd5 (worse is 17...Bd5 18.Nc4 Nc4 19.Bc4+=) 18.Bf6 gf6 19.Bf3 Qf5 20.Be4 Qf4 21.Qc2 (21.Bb7? Rad8 22.Qf3 Qd2 23.Qf6 Nd5–+) 21...Rad8 22.Rfd1 (22.Bh7? Kg7 23.Rfd1 f5–+) 22...Rd7 23.Nf1 h5 24.Rd7 Nd7 25.Bb7 Qe5 26.Rd1 Qb5 27.Be4 Rb8 (27...f5 28.Bf3=) 28.Ne3= Kg7 29.h3 a4 30.Qe2 Qc5 (30...h4 31.Bd5 Ne5 32.f4=) 31.Nd5= f5 32.Qh5 fe4 33.Qg5 ½–½. Vegjeleki,Adolf (2195) – Luzuriaga,Norberto Horacio (2335), corr ICCF WSTT/3/06/Final, 2009.

4.f4 b5 5.Nf3 a5 6.ba5 d5 7.Bb2 Qa5 8.Bd3 Be7 9.Ne5 0-0 10.0-0 c5 11.Rf3 c4 12.Nc4?? (better is 12.Be2!?=+) 12...bc4?? (better is 12...dc4 13.Bc3 Qa4–+) 13.Bf6 Bf6 (13...gf6?? 14.Rg3 Kh8 15.Qg4 cd3 16.Qg7) 14.Bh7 Kh7 15.Rh3 Kg8 16.Qh5 Bh4 17.Qh4 f6 18.Qh7 Kf7 19.Rh6 Qc5 20.Qg6 Ke7 21.Rh7 Kd8 22.Qg7 Nd7 23.Kh1 Re8 24.a4 d4 25.ed4 Qd4 26.Nc3 Qf4 (26...Qd2? 27.Rd1 Qd1 28.Nd1 Ra4 29.g4+–) 27.Rh8 Qe5 (27...Qd2 28.Re8 Ke8 29.Qg8 Nf8 30.Ne4–+) 28.Rd1 Ba6 (28...Qf5 29.Qh7 Qg5 30.Re8 Ke8 31.Qe4=+) 29.Rh7 (better is 29.Re8!? Ke8 30.Qg6 Ke7 31.Qh7 Kd6 32.Ne4 Kc6 33.Nc3–/+) 29...Ra7–/+ 30.Qh6 Qf5 31.Rg7 (31.Rh8!?–+) 31...Qc2 32.Re1 Bb7 33.Qe3 Ra5 34.Nb5 Bd5 (better is 34...Ra6!? 35.Nc3–+) 35.Nd6 Rf8 (36.Nb7 Bb7 37.Rd7 Kd7 38.Qe6 Kc7 39.Qe7 Kb8 40.Qf8 Ka7–/+; better is 35...Ra4!? 36.Ne8 Ke8–+) 0–1. Schulz,Hans_Juergen (2145) – Taulien,Hans_Juergen (2225), RS6D – A00 – Sokolsky Alt–1, 2004.

3.Bb2 (--> 1.b4 e6 2.Bb2 c6 3.e3).

3.Bb2 d5 4.Nf3 Nd7 5.c4 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.c4 e6).

3.Bb2 Nf6 4.a3 a5 5.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.b5 c6 5.e3).

3.Bb2 Nf6 4.a3 a5 5.b5 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6).

3.Bb2 Nf6 4.a3 a5 5.b5 d5 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 a5 6.b5).

3.Bb2 Nf6 4.a3 Be7 5.Nf3 0-0 6.Be2 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.Be2 c6).

4.a4 d5 5.c4 (5.Nc3 Bd6=) 5...Bd6 6.Bb2 Nbd7 7.Na3 (7.Nf3 0-0+=) 7...Qe7 (7...0-0!?–/+) 8.Nf3+= 0-0 9.Be2 e5 (9...a6 10.cd5 ab5 (worse is 10...Nd5 11.Nc4+=) 11.dc6 bc6=) 10.0-0 (10.bc6 bc6 11.cd5 cd5+=) 10...a6 (10...e4 11.Ne1 a6 12.bc6 bc6 13.d4–/+) 11.Qc2 (11.cd5 cd5 (worse is 11...Nd5 12.bc6 bc6 13.Nc4+=) 12.d3 h6+=) 11...e4 12.Nd4 Ne5 13.f4 ef3 14.Nf3 ab5 15.cb5 (15.Ne5 Be5 16.ab5 Ng4=) 15...Bd7–/+ 16.Nd4 (16.Be5 Be5 17.Ne5 Qe5–/+) 16...Ne4 17.d3? (17.bc6 Nc6 18.Nc6 bc6 19.Bf3–+) 17...Nc5–+ 18.bc6 Nc6 (18...bc6 19.Kh1 Na4 20.Bc1–+) 19.Ndb5? (better is 19.Nab5 Bb8 20.Rf2+=) 19...Qe3–+ 20.Kh1 Nb4?? (better is 20...Bb8 21.Bc1 Qe7–+) 21.Qc3+= d4 22.Qb4 Qe2 23.Qd4 (23.Nd6? Bc6 24.Ne4 Nd3 25.Qd4 Nb2–+) 23...Ne6 24.Qf2 (24.Qd6 Bb5 25.Nb5 (worse is 25.ab5 Qb2 26.h3 Ra4–/+) 25...Qb2 26.Qd5=) 24...Qf2–/+ (24...Qd3? 25.Rad1 Bb5 26.Nb5+– (26.Rd3 Bd3 27.Rd1 Bc5+=; 26.ab5?! Qd1 27.Rd1 Ba3+/–)) 25.Rf2 Ba3 (25...Bb4 26.Nc2 Bc5 27.d4–/+) 26.Ra3 Bb5 27.ab5 Ra3 28.Ba3 Rd8 29.Rd2 Rd5 30.Kg1 Rb5–/+ 31.Kf2 f5 32.Ke3 g5 33.Bb2 Kf7 34.Bh8 h5 35.Rf2 Kg6 36.d4 Nf4–+ 37.Rc2 Rb3 38.Kf2 Rb2 39.Rb2= Nd3 40.Ke3 Nb2 41.d5 Nc4 42.Kd4 Nd6 43.Kc5 Ne4 44.Kb6 Kf7 45.Be5 Ke7 46.Kb7 Kd7= 47.Kb6 h4 48.Kb5 Nd2 49.Kc5 f4 50.Kd4 Nf1 51.Bf6 Nh2 52.Bg5 f3 53.Bh4 fg2 54.Bf2 ½–½. Nikolic,Jovane (1685) – Poeta,Caio Medeiros (1865), 7th Sao Bernardo do Campo LXSBC op, 2011.

4.bc6 dc6 5.a4 (5.Nf3 Bd6=) 5...Bd7 (better 5...e5=+) 6.Ra3? (better 6.Nf3=) 6...Ba3-+ 7.Na3 0-0 8.h4 (8.Bb2 c5-+) 8...e5 (8...Qa5 9.Bb2 Qa4 10.Bf6 gf6 11.Nb1-+) 9.Rh2 (9.Bb2 e4-+) 9...Be6 10.Bb2 Nbd7 11.Bc3 (11.Qa1 Ng4 12.Rh1 f6-+) 11...Qc7 12.f3 Nc5 (better 12...e4 13.f4 Rfd8-+) 13.f4 (13.Qa1 Nfd7 14.Nc4-+) 13...ef4 (13...Na4?! 14.Be5 Qe7 15.Nc4-+) 14.Bd4 (14.Nf3 Ng4 15.Rh3 fe3 16.Qa1 ed2 17.Bd2 Na4 18.Be2-+) 14...fe3 15.de3 (15.Be3 Qg3 16.Bf2 Qa3-+) 15...Qh2 16.Bc5 (16.Nf3 Qg3 17.Ke2 Nce4 18.Bf6 Qf2 19.Kd3 Nf6-+) 16...Qg3 (16...Qh4 17.Ke2 Qh5 18.Nf3 Qc5 19.Qc1-+) 17.Kd2 (17.Ke2 Ne4 18.Qe1 Qg4 19.Nf3 Nc5-+) 17...Rfd8 18.Kc3 (18.Bd3 Ne4 19.Kc1 Nc5 20.Nf3-+) 18…Rd1 (18...Rd1 19.Kb2 Ne4-+) 0-1. dodo5471 - puan (1660), Rated Blitz tournament, lichess.org, 2013.

3.Bb2 d6 4.c4 e5 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

3.Bb2 e5 4.a3 (4.Be5 Bb4 5.Nf3 0-0=) 4...a5 5.Be5 ab4 6.ab4 (6.Nf3 d5=) 6...Ra1 7.Ba1 Bb4 8.Nf3 d5 (8...0-0 9.Be2=) 9.c4 0-0 10.Bf6 Qf6 11.Qb3 Qd6 12.cd5 cd5 13.Be2 Nc6 (13...Be6 14.Ng5=) 14.0-0 (14.Nc3 Be6 15.Ng5 d4=) 14...d4=+ 15.Rc1 Be6 (15...Bg4 16.Qc4 Be6 17.Qb5=) 16.Qd3 de3 (16...Rd8 17.Ng5 g6 18.Ne6 Qe6 19.Qb5 de3 20.de3=) 17.fe3 Qe7 18.Qe4 Ra8 (18...Rc8 19.Nc3=) 19.Nc3 f5 (19...Bc5 20.Nb5=) 20.Qb1 (20.Qd3 Kh8=) 20...Ra3 (20...Ba3 21.Rf1 Bc5 22.Bb5=) 21.Nb5 Ra5 22.Kf1 (22.Qd3 g6=) 22...g6 (22...h6 23.g3=) 23.Nbd4= Nd4 24.Nd4 Bd5 (worse 24...Bd2 25.Rc2 Bd5 26.Rd2 Qe3 27.Nf3+–) 25.Bc4 Bc4 (25...Bd2? 26.Bd5 Rd5 27.Rc8 Kg7 28.Qb2+–) 26.Rc4 Bd6 (26...Bd2? 27.Qb3 Ra3 28.Rc8 Kg7 29.Qb2+–) 27.Rc8 Kg7 28.Nf3 Ra4 Black intends f4 (28...Qd7 29.Qb2 Kh6 30.Rg8=) 29.Qb5 Rb4 30.Qd5 Kh6 31.Rc1 f4 32.Re1 fe3 33.Re3 Qc7 34.Nd4 (34.Re6 Bf8= (34...Bh2 35.Qg5 Kg7 36.Re7 Kg8 37.Qd5 Kh8 38.Rc7 Bc7 39.Qc5+–)) 34...Qc4 (34...Bh2 35.Rh3 Kg7 36.Ne6 Kh8 37.Nc7 Bc7 38.Qd7 Rf4 39.Ke2 Rh4 40.Rh4 h5 41.Qc7 Kg8 42.Ra4 b5 43.Ra8) 35.Qc4 Rc4 36.Ne6 (36.Nf5 gf5 37.Re6 Kg5 38.Rd6 b5=) 36...g5 37.h3 b5 (37...Kg6 38.Rd3 Bb4 39.Rd7=) 38.Rd3 Bf4 39.Nf4 Rf4 40.Ke2 Rf6 (40...Kg6 41.Rb3=) 41.Rd7 b4 42.Rb7 Re6 43.Kd3 Rd6 ½–½. Pleschke,Helmut (1700) – Van Gameren,Marc (1750), 3 ECT B SEMI, 1999.

3.Bb2 g5 4.h3 (4.h4 gh4 5.Bf6 ef6 6.Rh4 d5+= 7.Nf3 Bd6 8.a3 Be6) 4...Bg7 (4...d5 5.Nf3 h6 6.c4 Bg7 7.Bf6 Bf6 8.d4 g4) 5.d3 (5.Nf3 h6= 6.Nc3 d5 7.Be2 Qd6 8.b5 a6) 5...0-0 (5...h6 6.Nf3= d5 7.Be2 a5 8.a3 b6; 5...d5 6.Nf3 g4 7.hg4 Bg4 8.Be2 Qd6; 5...Qb6 6.a3 d5 7.Nf3 h6 8.Be2 Nbd7) 6.Nf3 (6.h4 gh4 7.Rh4 a5= 8.ba5 Qa5) 6...d5 (6...h6 7.Bf6 (7.d4 a5 8.ba5 Qa5) 7...Bf6 8.d4= Qb6; 6...a5 7.Ng5 ab4 8.Bf6 ef6) 7.Ng5+= Qd6 (7...Qb6 8.a3 c5) 8.a3 (8.c3 e5) 8...b5 (8...a5+=) 9.Qf3?? (9.c4+=) 9...d4?? (better is 9...h6 10.h4 Bg4–/+) 10.Bd4+– Bb7 (10...a5 11.ba5 Ra5 12.Bc3+–) 11.Qe2 (11.Nc3 Nbd7+–) 11...e5? (better is 11...a5 12.c3 Nbd7+–) 12.Bc5+– Qd7 (12...Qd8 13.Bf8 Qf8 14.c3+–) 13.Bf8 Bf8 14.Nc3 c5 15.bc5 e4 (15...Bc5 16.Nge4 Ne4 17.Ne4+–) 16.de4 (16.Rd1 Qc8 17.Nge4 Ne4 18.Ne4 Bc5 19.Nc5 Qc5 20.Qg4 Kf8+–) 16...Bc5 (16...a6 17.e5 Qe7 18.f4+–) 17.Nb5 (17.Qb5 Qb5 18.Bb5 h6+–) 17...Nc6 (17...Qe7 18.c3+–) 18.Rd1 (better is 18.Qf3 Qe7 19.Qg3 Kf8+–) 18...Qc8 (18...Qe7+–) 19.Qf3 Be7 20.Bc4 (better is 20.Nf7 Na5 21.Nfd6 Bd6 22.Qf6 Bf8+–) 20...Ne5 21.Bf7! Kg7?? (21...Nf7 22.Qf4) 22.Qg3 Neg4 (22...Ng6 23.Bg6 hg6+–) 23.hg4 Qc2 24.0-0 (24.Qe5 Qd1 25.Kd1 Rd8 26.Ke1 Bb4 27.ab4 Be4 28.Ne6 Kf7 29.Nd8 Kg8 30.Qe6 Kg7 31.Qf7 Kh8 32.Qf8 Ng8 33.Nf7) 24...Ne4 25.Ne4 (25.Qe5 Bf6 26.Qf5 Ng5 27.Qc2 Nf7+–) 25...Kf7 (25...Qe4 26.Rd7 Rd8 27.Nc3 Rd7 28.Ne4 Be4 29.Qf4+–) 26.Qf4 (better is 26.Rd7 Qe4 27.Nd6 Ke6 28.Re7 Ke7 29.Ne4 Be4 30.Qe5 Kf8+–) 26...Kg8 27.Rc1 (better is 27.Ned6 Rf8 28.Nf5 Rf5 29.gf5+–) 27...Qa4 (27...Qe4 28.Qe4 Be4+–) 28.Rc7 (28.Nf6 Bf6 29.Qa4 Rf8+–) 28...Rf8 (28...Qe4 29.Qe4 Be4 30.Re7 Bd3+–) 29.Nf6! Bf6 (29...Bf6 30.Qc4 (30.Qa4; 30.Rb7); 29...Rf6 30.Qc4 (30.Qa4; 30.Qg5; 30.Qd4; 30.Rb7)) 30.Qa4 Be5 31.Rb7 Rf2 (31...Rb8 32.Qc4 Kh8 33.Qf7 Bh2 34.Kh2 Rb7 35.Qf8) 32.Rf2 (32.Qc4 Kh8 33.Qc8 Rf8 34.Rf8) 32...h5 (32...Bh2 33.Kh2 a6 34.Qb3 Kh8 35.Rf8) 33.Qc4 Kh8 34.Qc8 1–0. novice1234 – interloper, ChessWorld.net, 2009.

3.b5 c5 4.Ba3 (4.Bb2 d6=) 4...b6 (4...e5 5.d4 cd4 6.Bf8 Rf8 7.ed4=) 5.Bb2 d5 6.Bf6 gf6 7.h3 (7.c4 a6=) 7...Bg7 8.c3 Nd7 9.a4 (9.d4 a6=) 9...f5 10.Qf3 (10.d4 Nf6=) 10...e6 11.Qg3 (11.Na3 Ne5 12.Qg3 Rg8+=) 11...Bf8 (11...Rg8 12.d4+=) 12.Nf3= c4 13.Ng5 (13.d3 cd3 14.Bd3=) 13...Bd6 (13...a6 14.ba6 Ba6–/+) 14.Qh4?? (better is 14.Ne6 Bg3 15.Nd8 Kd8 16.fg3+=) 14...Qf6 (14...Be7 15.f4 h6 16.Qh5 Bg5 17.fg5 Qg5 18.Qf3–/+) 15.f4 (15.Qh5 f4–/+) 15...Nf8 (15...a6 16.ba6 Ba6 17.Be2–/+) 16.g4 (16.a5 Rb8+=) 16...h6 17.Nf3 Be7 (17...Qh4 18.Nh4 fg4 19.hg4+=) 18.g5 (18.Qf6!? Bf6 19.gf5+=) 18...hg5 (18...Qg7 19.Qf2+=) 19.Qg5 (19.fg5 Qg7 (worse is 19...Rh4 20.gf6 Bf6 21.Nh4 Bh4 22.Ke2+=) 20.Qf4 Nd7+=) 19...Qg5 20.fg5 Ng6 (20...a6 21.ba6 Ba6 22.Ra2+=) 21.d3 (21.h4!?=) 21...cd3–/+ 22.Bd3 Bb7 (22...e5 23.a5 ba5 24.Be2–/+) 23.Nbd2 (23.Ke2 Nh4 24.Nbd2 Rc8+=) 23...Rc8–/+ 24.c4? (better is 24.Ke2–/+) 24...dc4–+ 25.Be2 c3 26.Nb3 c2 27.h4 (27.a5 f6 28.gf6 Bf6–+) 27...Bd5 28.Nc1 Bb4 (28...Bg5 29.Ng5 Bh1 30.h5–+) 29.Kf1 (29.Kf2 Ne5! 30.Kg3 Bc3–+) 29...Bc3 30.h5 (30.Ra2 Ba2 31.Na2–+) 30...Ba1 31.Rh2 (31.Kf2 Ne5 32.h6 Bb2 33.Ne5 Bh1–+) 31...Bb2 32.Bd3 (32.hg6 Rh2 33.g7 Rh1 34.Kg2 Ke7 35.Kh1 Bc1–+) 32...Bc4 (32...Bf3 33.h6 Bc1 34.Bc2 Be3 35.Rh3 Rc2 36.Rf3 Bg5 37.Rf2 Rc1 38.Ke2 Nf4 39.Rf4 Bf4 40.h7 Rh7 41.Kf3 Rh3 42.Kf4 f6 43.a5 Rc4) 33.hg6 (33.Bc4 Rc4 34.hg6 Rh2 35.g7 Rh1 36.Kg2 Rc1 37.g8Q Ke7 38.g6 Rg4 39.Kf2 Rf1 40.Kf1 c1Q 41.Ne1 Rg6 42.Qb8–+) 33...Rh2 (33...Bc1 34.Rh8 Ke7 35.Rc8 Bd3 36.Kf2 fg6 37.Ne1+=) 34.Nh2 Bc1 35.Bc4 Rc4 36.g7 Be3 37.g8Q Ke7 38.Kg2 c1Q 39.Nf1 Qc2 40.Kf3 Qf2 0–1. Eries – novice1234, ChessWorld.net, 2009.

3.c4 a5 4.b5 g6 5.Bb2 Bg7 6.Nf3 0-0 7.Nc3 d5 8.d4 Nbd7 9.Be2 dc4 10.Bc4 c5 11.dc5 Nc5 12.0-0 a4 13.Rc1 a3 14.Ba1 b6 (14...Be6 15.Be6 Ne6 16.Qb3+=) 15.Nd5+= Bb7 16.Nf6 Bf6 17.Bf6 ef6 18.Nd4 f5 19.Nc6 Bc6 20.bc6 Qc7 21.Qf3 Ne4 22.Rfd1 Rfd8 23.Rd4 Rac8 24.Qd1 Kg7? (24...Rd4 25.ed4 Qf4 26.Qf1+=) 25.Bb5 (25.Ba6 Rb8 26.Rd8 Rd8 27.Qd8 Qd8 28.c7+/–) 25...Nc5+/– 26.Qc2 Ne4 27.Rd7 Qe5?? (better is 27...Qd7! 28.cd7 Rc2 29.Rc2 Kf8+=) 28.Rd8+– Rd8 29.c7 (29.c7 Rg8 30.Bd7+–) 1–0. Krebbers,Wilfried (2115) – Sorin,Boris (2065), NRW Class1, 2009.

3.c4 b5 4.c5 d6 5.a4 dc5 6.bc5 Ne4 7.Qc2 Bf5 8.Bd3 Qd5 9.Nc3 Nc3 10.Qc3 Bd3 11.ab5 Bb5 12.Nf3 Qc4 13.Qa5 Qe2 0–1. AleksandrNekhoroshik – mohammadalivar1, lichess.org, 2020.

3.c4 c6 4.Bb2 e6 5.a3 Be7 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 Be7 6.c4).

3.Bc4 d5=+ 4.Bb3 (4.Be2 e5 5.a3 Bd6–/+) 4...e6 (4...e5 5.Bb2–/+) 5.Nf3 (5.a3 a5=+) 5...Bb4–/+ 6.0-0 0-0 7.Bb2 (7.d4 Ne4–/+) 7...Bd6 (7...Nbd7 8.Ne5–/+) 8.Bf6 (8.Be5 c5–/+) 8...Qf6–+ (8...gf6?! 9.d4=+) 9.Nc3 (9.d4 Bd7–+) 9...b5 (9...e5 10.e4 d4 11.Ne2–+) 10.Ne2 (10.d4 a5 11.a4 b4–+) 10...a5 (10...e5 11.a4 b4 12.d4–+) 11.c3 (11.a4 b4–+) 11...e5 (11...a4 12.Bc2 e5 13.Ng3–+) 12.d3 (12.a4 ba4 13.Ra4 Nd7–+) 12...Bg4 13.Ne1 (13.Ng3 a4 14.Bc2 Rd8–+) 13...Nd7 (13...a4 14.Bc2–+) 14.f3 Bf5 (14...Be6 15.a4–+) 15.e4 Be6 16.Ng3 (16.d4 ed4 17.Nd4 Nb6–+) 16...a4 17.Bc2 (17.ed5 cd5 (17...ab3?! 18.Ne4 Qe7 19.de6 Qe6 20.ab3–/+) 18.Bc2 Rfc8–+) 17...Bc5 Black plans d4 18.Kh1 d4 19.c4 bc4 (19...Bd6 20.cb5 cb5 21.f4 ef4 22.Ne2–+) 20.dc4 (20.Ba4 Ra6–+) 20...Bc4 21.Bd3 Be6 22.Qc2 (22.f4 ef4 23.Nh5 Qh6 24.Nf4 Bd6–+) 22...Be7 (22...Rfb8 23.f4 ef4 24.Nh5–+) 23.Bc4 (23.f4 ef4 24.Nh5 Qh6 25.Nf4 Bd6–+) 23...Bc4 24.Qc4 Qe6 25.Qe6 (25.Qc2 c5–+) 25...fe6 26.Nd3 c5 27.Rfc1 Rac8 (27...Rfc8 28.Nb2–+) 28.Nb2 Bg5 (better 28...Bh4–+) 29.Rc4 (29.Rc2–+) 29...Nb6 30.Rc2 c4 31.Nf1 (31.Rb1 c3 32.Nd3 Nc4–+) 31...a3 32.Nd1 Na4 Black prepares c3 33.Nd2 Bd2 34.Rd2 c3 35.Rd3 (35.Nc3 Nc3 36.Kg1 Rb8–+) 35...c2 36.Ra3 (36.Rc1 cd1N 37.Rcd1 Nb2–+) 36...c1Q 37.Rc1 Rc1 38.Ra4 (38.h4–+) 38…Rd1 0–1. klescev – pcmvr, net–chess.com, 2017.

3.Bd3 Qb6 4.c3 (4.a3 d5=) 4...c5 (4...d5 5.Nf3=+) 5.b5 (5.bc5 Qc5 6.Nf3 d5=) 5...d5=+ 6.a4 (6.c4 Be6 7.Na3 Nbd7=+) 6...Ng4 (6...e5 7.a5 Qe6 8.Bc2=+) 7.Kf1 (7.Be2 Ne5=) 7...e5 (7...Qf6 8.f3–/+) 8.Be2=+ Qg6 9.d4 cd4 10.cd4 e4 11.Nc3 (11.Ba3 Ba3 12.Na3 0-0=+) 11...Bd6 12.Bg4 Bg4 (< 12...Qg4 13.Qg4 Bg4 14.Nd5+=) 13.Qb3 Be6 14.Bd2 (14.Ba3!? Ba3 15.Ra3=+) 14...0-0 15.f3 (15.Nge2 Qf5–/+) 15...Nd7 16.Re1 (16.Rc1 Nb6–/+) 16...Nb6–+ 17.Nce2 (17.Rc1 Nc4 18.Qd1 Ba3–+) 17...Nc4 18.Bc1 (18.Rd1 Rfe8–+) 18...a6 (18...Rac8 19.Kf2–+) 19.Nc3 (19.Nf4 Qg5–+) 19...Qf5 (19...Qf6 20.ba6 ba6 21.Qb7 ef3 22.Nf3–+) 20.g4 (20.Kf2–+) 20...Qf6 21.g5 (21.ba6 ba6 22.Qb7 Rfb8–+) 21...Qf5 (21...Qg5 22.Kf2–+) 22.f4 Ne3?? (better is 22...f6 23.gf6 Rf6–+) 23.Be3–/+ Bf4 24.Ke2 Qg5 (better is 24...Be3!? 25.Ke3 Qg5 26.Kf2 Qf4 27.Kg2 e3–+) 25.Bf4=+ Qg2 26.Kd1 (26.Ke3 Qh1 27.Nd5 Qg2=+) 26...Qh1–/+ 27.Bd6 (27.ba6!? ba6 28.Nd5–/+) 27...Rfd8 28.Bc7 (28.Bf4 Bg4 29.Kd2 Rac8–+) 28...Rdc8 (28...Rd7 29.Be5–+) 29.b6 Bg4 (29...Qg2!?–+) 30.Kc1–/+ Be6 (30...Bd7–/+) 31.Qa2 (31.Kd1 e3 32.Bf4–/+) 31...Kh8 (31...Re8 32.Kd1–+) 32.Kd1–/+ f5 33.Qb3 (33.Qf2 Re8–/+) 33...Qg2–+ 34.Bg3 (34.a5 Qg4 35.Nge2 Qf3–/+) 34...Rc4 35.Be5 Rac8 36.Nce2 Bd7 37.Kd2 f4! 38.Bf4 Rd4 39.Ke3 Rd3 40.Qd3 ed3 41.Nf3 de2 42.Bc7 Re8 43.Ne5 d4! 44.Kd2 Qg5 45.Kc2 Bf5 46.Nd3 Bd3 47.Kd3 Qe3 48.Kc4 d3 49.Bf4 Rc8 50.Bc7 d2 51.Re2 Qe2 52.Kb3 d1Q 53.Ka3 Qed3 54.Kb4 Qd4 55.Ka5 Q1a4# 0–1. Sargon 4 1.03 – K_Chess 1.2, #018–#054, 1995.

3.Bd3 e5 4.a3 =+.

3.d4 e6 4.Bd2 (4.a3 d5=) 4...d5 5.Nf3 Bd6 6.c4 dc4 7.Bc4 Nbd7 (7...Nd5 8.a3=) 8.b5 (8.0-0 Ne4=) 8...cb5 9.Bb5 0-0 (9...a6 10.Bd3=) 10.0-0 a6 11.Bd3 Re8 (11...b5 12.a4 b4 13.e4=+) 12.Qc2 e5 13.Nc3 ed4 (13...Qe7 14.Ne4=) 14.ed4 b5 15.Ne4 (15.Rfe1 Be7=) 15...Be7 16.Nfg5 (16.a4 b4 17.Qc6=) 16...Bb7 (better is 16...h6!? 17.Nf3 Bb7=+) 17.Nf7+= Qb6 (17...Kf7 18.Ng5) 18.Nfg5 h6 19.Nf3 Rac8 20.Qb1 Bd5 (20...Qe6 21.Re1 Ne4 22.Be4 Be4 23.Re4+/–) 21.Re1 Ba3 22.Bf4 Nh5 23.Be3 Qc6 24.Re2 (24.Ned2 Nhf6+=) 24...Be4 (24...Nhf6 25.Nf6 Qf6 26.Bf5+=) 25.Qb3 Bd5 26.Qa3 Bf3 27.Rc2 Qe6 28.gf3 Nhf6 29.Rc8 Rc8 30.Re1 Rc6 31.Bd2 Qd5 32.Qb3 Qb3 33.ab3 Rd6 34.Be3 Nd5 35.Kf1 Kf7 36.f4 N7f6 37.Ke2 Nh5 Attacking the isolated pawn on f4 ½–½. pierre (1805) – smurilo (1855), Polish, 2006.

3.Qf3 e6 4.a3 a6 (4...e5 5.Bb2 d6 6.e4=) 5.Bb2= Be7 6.d4 d5 7.Nd2 (7.c4 b5 8.c5 a5=) 7...Bd7 8.Bd3 b5 9.Ne2 a5 10.c3 Bd6 11.Ng3 (11.e4 e5=) 11...g6 (11...e5 12.de5 Be5 13.h3=+) 12.Nb3 ab4 (12...e5!? 13.de5 Be5=) 13.cb4+= Na6 14.0-0 Bf8 (14...Qe7 15.Rfc1+=) 15.Qe2 (15.Na5 Bg7+–) 15...Bg7 16.f3 Qc7 (16...h5 17.e4+=) 17.Qf2 Qb7 18.Qe2 (18.e4 0-0+=) 18...Ra7 (18...Qc7!?=) 19.Qc2 Bf8 (19...0-0 20.e4+=) 20.Nc5 (20.e4!?+–) 20...Nc5+= 21.dc5 Bg7 22.Bd4 Qb8 (22...0-0 23.e4+=) 23.a4 (23.Qb2 Qd8+–) 23...0-0 (23...e5 24.Bb2 ba4 25.Ra4 Ra4 26.Qa4=) 24.a5 (24.Qc3 Ne8 25.Bg7 Ng7 26.ab5 cb5 27.Ra7 Qa7+–) 24...Re8 (24...e5!? 25.Bc3 Re8+=) 25.f4+– e5 (25...Ng4 26.Bg7 Kg7 27.Qd2+–) 26.fe5 (better 26.Be5 Re5 27.fe5+–) 26...Ne4? (better 26...Ng4!? 27.e6 Re6 28.Bg7 Kg7+=) 27.Ne4 (better 27.Be4!? de4 28.Qf2 Be6 29.Ne4 Bc4+–) 27...de4 28.Be4 Be5 29.Qc3?? (29.g3 Ra6+–) 29...Qc7?? (better 29...Bh2 30.Kh1 Re4–+) 30.g3 (30.Be5 Qe5 31.Qe5 Re5+–) 30...Bd4? (better 30...Bg3!? 31.hg3 Re4+=) 31.Qd4+– Be6 (31...Qe5 32.Qe5 Re5 33.Bg2+–) 32.Rf3 (better 32.Qd6 Bc4 33.Bc6+– (33.Qc6?! Qe5 34.Bc2 Bf1 35.Rf1 Ree7+=)) 32...Qe7? (better 32...f5 33.Bc2 Bd5+–) 33.Bc6+– Rd8 (33...Bd7 34.Bd5 Be6 35.e4+–) 34.Qf6 (34.Qe5 Qc7 35.Qc7 Rc7+–) 34...Qf8 (34...Qc7 35.Rf4 (35.Bb5?! Rb7 36.Bc6 Rb4+–) 35...Rb8 36.Bg2+–) 35.a6 (worse 35.Bb5 Rb8 36.Bd3 Rb4+–) 35...Bd5 36.Bd5 Rd5 37.Qb6 Rad7 (37...Qa8 38.Qb5 Re5 39.Qf1+–) 38.Rff1 (better 38.a7 Rd8 39.Qb5+–) 38...h6 (38...Qe8 39.c6 Rd8+–) 39.a7 (39.Qc6 Qe7 40.Qc8 Rd8+–) 39...Qa8 40.Qb8 (better 40.c6 Rd2 41.Rfc1+–) 40...Qb8 (40...Rd8 41.Qa8 Ra8+–) 41.ab8Q (41.ab8Q Rd8 42.Qb5+–) 1–0. lindsey000 – mousehound, gameknot.com, 2018.

3.Nf3 a5 4.b5 d5 5.Bb2 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6 5.Nf3).

3.Nf3 Qb6 4.a3 a5 5.b5 d5 (5...g6 6.Nc3+= Bg7 7.Rb1 0-0 8.Bd3 d5 9.bc6 Qc6 10.0-0 Na6; 5...Ne4 6.Bb2 Na6 7.Nc3 Nac5 8.Rb1 f6 9.Ne4 Ne4 10.bc6 Qc6) 6.Bb2 (6.Nc3 Nbd7+= 7.Be2 Nc5 8.bc6 bc6 9.0-0 Qc7 10.Qe1 e5) 6...Bg4 (6...Nbd7 7.Be2= (7.Nc3 e6 8.bc6 bc6 9.Rb1 Qc7 10.d4 Bd6) 7...e6 8.Nc3 Bd6 9.0-0 0-0 10.bc6 bc6) 7.c4 (7.Nc3 Nbd7 8.h3 Bf3 9.Qf3 e6 10.Qf4 c5) 7...Nbd7 8.Nc3 e5 (8...Nc5 9.Na4 Na4 10.Qa4 Bd7) 9.cd5 (9.h3 Be6 10.Na4 Qc7) 9...cd5 10.h3 Bf3 (10...Be6=) 11.gf3 (11.Qf3 e4 12.Qd1 Qe6=) 11...d4 (11...Be7 12.Na4 Qe6 13.Rc1=) 12.Na4 Qe6 13.Rg1 (13.Qc2 Bd6=) 13...g6 14.Qe2 (14.Bg2 Rd8+=) 14...Bg7 (better is 14...Bd6+=) 15.0-0-0?? (better is 15.Qc4=) 15...0-0 (better is 15...Rc8!? 16.Kb1 Qb3 17.ed4 Qc2 18.Ka1 Qa4 19.f4–+) 16.Kb1 0–1. Campora,Daniel Hugo (2520) – Komljenovic,Davor (2415), XXXIV Open, Seville ESP, 2009.

3.Nf3 d6 4.c4 (4.d4 Nbd7=) 4...g6 (4...e5 5.d3=) 5.Bb2 Bg7 6.Nc3 0-0 7.d4 Bg4 8.Be2 Qb6 9.Qb3 Nbd7 10.h3 Bf3 11.Bf3 e5 12.c5 (12.0-0 Rfe8+=) 12...Qc7 13.0-0 d5 14.de5 Ne5 (worse 14...Qe5 15.Nd5 Qg5 16.Nf6 Bf6 17.Rad1+–) 15.Bd1 (better 15.Be2=) 15...Nc4–+ 16.Ne2? (better 16.Bf3 Nd2 17.Qc2 Nf1 18.Rf1–/+) 16...Nb2 17.Qb2 Ng4!! 18.Qg7 (18.hg4 Bb2 Discovered attack) 18...Kg7 19.hg4 a5 20.b5 cb5 21.Rc1 (21.Bb3 Qc5 22.Rfd1 Rfd8–+) 21...b4 (21...Rac8 22.Bb3–+) 22.Nd4 a4 23.Bf3 Rfd8 (23...Ra5 24.c6–+) 24.Rfd1 Rac8 (24...Qe7!? 25.Ne2–+) 25.Nb5 Qe5 26.Nd6 Rc5 (26...Rc6 27.Nb7 Rd7 28.Na5–+) 27.Rc5? (better 27.Nf7!? Kf7 28.Rc5–/+) 27...Rd6–+ (worse 27...Qd6 28.Rcd5 Qe6 29.Rd8 Qa2 30.R8d7+– (worse 30.Bb7 b3+–)) 28.e4? (28.Rcd5 Rd5 29.Bd5–+) 28...Qb2 Black prepares b3 29.Rcd5 Re6 (29...Rc6 30.e5–+) 30.Rd7 (30.R5d2 Qa3 31.g5–+) 30...Qa2 31.Rb7 b3 32.Rdd7 (32.Kf1 b2 33.e5 Qc4 34.Kg1 Qc2–+) 32...Rf6 (32...b2 33.Rf7 Kg8 34.Rg7 Kf8 35.Rgf7 Ke8 36.Rh7 b1Q 37.Rb1 Qb1 38.Kh2–+) 33.e5 (33.g5 Rf4 34.Rd1 a3–+) 33...Qa1 34.Kh2 (34.Bd1 Qe5 35.Kf1–+) 34...Qe5 35.Kh3 (35.Kh1 Qe1 36.Kh2 Qf2–+) 35…g5 (35...g5 36.g3 Rf3–+) 0–1. Pisarsky,Georgy (2080) – Khorganov,Vladimir, sfo–vet–08, 2008.

3.Nf3 e5 4.Ne5 Bb4 5.Bb2 (5.Nd3 Be7=) 5...0-0 (5...d5 6.Be2=) 6.Be2 (6.Nd3 Be7=) 6...d6 (6...d5 7.0-0=) 7.Nf3 (7.Nd3 Ba5=) 7...Be6 (7...d5 8.0-0=) 8.0-0 Nbd7 9.d3 (9.Nd4 Bc5=) 9...Qb6 (9...d5 10.Nbd2=) 10.c4 Rfe8 (10...d5 11.Nbd2=) 11.Qc2 (11.Nbd2 d5=) 11...Qc5 (11...d5 12.cd5 Nd5 13.Nd4=) 12.Nbd2 (12.a3 Ba5+=) 12...Bg4 (12...d5 13.a3 Bd2 14.Nd2 dc4 15.Nc4=) 13.h3+= Be6 14.Rfb1 (14.Nb3 Qf5+=) 14...Qa5 (14...d5 15.a3 Bd2 16.Qd2+=) 15.Nb3 Qa4 (15...Qd8 16.a3 Bc5 17.Nc5 Nc5 18.Bc3+=) 16.Qc1 (16.Nbd4 Qc2 17.Nc2 Ba5+=) 16...b5 (16...d5 17.c5 b6 18.Bf6 Nf6 19.a3 Bc5 20.Nc5 bc5 21.Qc5+=) 17.Nbd4+/– Bc5 18.Ne6 (18.Nc6?! bc4 19.Ncd4 cd3 20.Bd3 A) 20...Ba2?? 21.Bb5 Qa5 22.Bc4 Bd4 23.Bd4+– (worse is 23.Nd4 Rec8 24.Ra2 Qb4+–; 23.Ba2 Bb2 24.Qb2 Qc7+=; 23.ed4?! Rac8=; 23.Ra2 Bb2 24.Rbb2 Qc5+=); B) 20...Bd5+=) 18...fe6 19.d4 Bb4 20.a3 Ba5 21.cb5 Rac8 (21...cb5 22.Qc6 a6 23.Ng5+/–) 22.bc6 Rc6+/– 23.Qf1 Rb6 24.Bd3 Qc6 25.Qc1 Qb7 26.Qc2 Rc8 27.Qa4 Bc3 28.Bc3 Rc3 29.Qd1 Rb1 30.Rb1 Qc8 31.a4 Qc7 32.Qd2 a5 33.d5 e5 34.Ng5 Nf8 35.Bf5 g6 36.Bd3 h6 37.Ne4 Ne4+/– 38.Be4 Rc4 39.Qd3 Kg7+= 40.Ra1 Rb4 41.Kh2 Qe7 42.f3+/– Qc7 43.Kh1 (43.Ra3!?+/–). b4_player – opponent, gamecolony.com, 2008.

3.h3 a5 4.b5= g6 (4...cb5 5.Bb5 e5 6.Bb2=) 5.Bb2 Bg7 6.g4 (6.Nf3 cb5 7.Bb5 0-0+=) 6...h6 (6...cb5 7.g5 Nh5 8.Bg7 Ng7 9.Bb5=) 7.bc6 (7.Bf6 Bf6 8.d4 cb5 9.Bb5 h5=) 7...bc6 (7...Nc6 8.Bf6 Bf6 9.d4+=) 8.Bg2 (8.Nc3 0-0=) 8...Qb6 (8...0-0 9.Bf6 Bf6 10.d4+=) 9.Qc1 (9.Bd4 Qd8=) 9...d5+= 10.Nc3 a4 (10...h5 11.g5 Ne4 12.Nd5 Qb2 13.Qb2 Bb2 14.Nc7 Kd8 15.Na8 (15.Be4? Kc7 16.Rb1 Be5–+) 15...Ba1 16.Be4+=) 11.Rb1= Qc7 12.a3 e5 13.Nce2 (13.Nf3 e4 14.Nd4 c5+–) 13...Ba6 (13...0-0 14.c4 Be6 15.cd5 Bd5 16.Bd5 Nd5 17.e4=) 14.Nf3= Nbd7 15.d3 0-0 (15...e4 16.de4 0-0 17.ed5 cd5 18.g5 hg5 19.Ng5 Be2 20.Ke2+/–) 16.g5 hg5 17.Ng5 Rae8 Black prepares e4 18.Ng3 (18.c4 dc4 19.dc4 e4+=) 18...Qa5 19.Kd1 e4 20.de4 de4 21.N3e4 (21.f4 Qd5 22.Ke1 Bc4=) 21...Ne4+= 22.Ne4 Qh5 23.f3 Re4 24.Bg7 Kg7 25.Qb2 Re5 (25...Kh7 26.Qc3–+) 26.Kc1? (26.Qc3 Qg5 27.Rg1 Qe3 28.Qe3 Re3–+) 26...Kg8 (26...Qg5 27.Rd1 Qe3 28.Rd2–+) 27.Rd1 (27.Qc3 Qg5 28.Rd1 Re3–+ (28...Qg2 29.Rd7 Qg1 30.Kd2 Qf2 31.Kc1 Re3 32.Qc6 Re1 33.Kb2 Rb8 34.Kc3 Reb1 35.Qa6 Qf3 36.Rd3–+)) 27...Rb5 (27...Re3 28.Qd4 Re7 29.f4–+) 28.Qd4 Qd5 (28...Rb1 29.Kb1 Rb8 30.Ka1–+) 29.Qd5 (better is 29.Rb5!? Bb5 30.Qd5 cd5 31.Rd5–/+) 29...Rd5–+ (29...cd5?! 30.Rb5 Bb5 31.Rd5–/+) 30.Rd5 (30.Rb4 Nc5–+) 30...cd5 31.f4 Bc4 (31...Nf6 32.Rb6 Re8 33.Ra6+/–) 32.Rb4 Re8 (32...Nc5 33.e4 Rd8 34.e5–+) 33.Kd2? (better is 33.e4–/+) 33...Nc5–+ 34.Bf3 Kg7 35.h4 (35.Bg2 Kf6–+) 35...Re7 (35...Kf6 36.Bg2–+) 36.h5 (36.f5 Kf6 37.fg6 fg6 38.Rb6 Kf5–+) 36...gh5 37.Bh5 Ne4 38.Kc1 Nf6 (38...Kh6 39.Bf3–+) 39.Bd1 Re3 40.Ra4 Ne4 41.Ra7 (41.Bg4 Re1 42.Kb2 Kf6–+) 41...Re1 42.a4 Be2 43.a5 Rd1 44.Kb2 Rd4 (44...Kf6 45.a6–+) 45.a6 (45.Ka3 Rc4 46.Kb2 Bd1–+) 45...Ra4 46.Rd7 Bc4 (better is 46...Nf6!? 47.Re7 Ba6 48.f5–+) 47.a7 Kf6 48.Rb7 Ra2 49.Kb1 (49.Kc1 d4–+) 49...Nc3 50.Kc1 Nb5 (50...Nb5 51.a8Q Ra8–+) 0–1. Filipek,Jakub (2400) – Mahieu,Rimsky (1995), Open VPTD, 2003.

3.h3 e5=+ 4.Bb2 Bb4 5.Be5 d6 6.Bc3 a5 7.Qf3 Nbd7 8.Bf6 Qf6 9.c3 0-0?? 10.Qf6 Nf6 11.d4 Bf5 12.cb4 ab4 13.Nd2 Rfe8 14.Ne2 b5 15.g4 Bd7 16.Bg2 Ra4 17.g5 Nd5 18.Bd5 cd5 19.Nf4 Bc6 20.Ke2 g6 21.Rhc1 Bb7 22.Rc7 Ba6 23.Nd5 Rc8 24.Ne7 Kf8 25.Nc8 Bc8 26.Rc8 Kg7 27.Ne4 d5 28.Nf6 b3 29.Rg8# 1–0. pierre (1955) – Mokolato, internet, 2006.

3.h3 e6 4.a3 =+.

3.h4 d5 4.Nf3 e5 5.Bb2 (5.Ne5!? Bb4 6.Bb2+=) 5...e4–/+ (worse is 5...Bb4 6.Ne5 0-0 7.h5+=) 6.Ne5 Bb4 7.a3 Bd6 8.Be2 Qe7 9.0-0?? (better is 9.Ng4–+) 9...Be5 10.Nc3 0-0 11.d4 (11.h5 b5–+) 11...Bd6 12.f4 (12.h5 Ng4! 13.Bg4 Qh4–+) 12...ef3! 13.Bf3 (13.Bf3 Qe3 Discovered attack; 13.Rf3 Ng4 Combination; 13.gf3 Qe3 Discovered attack) 13...Qe3 14.Rf2 Bg3 15.Qf1 (15.Qd2 Bf2 16.Qf2 Qf2 17.Kf2–+) 15...Qd4 16.Rd1 Qh4 17.Re2 Qh2 0–1. Kissick,Philip H. E – Gunkel,Wolfgang, WS/O/096 ICCF, 2006.

4.a3 d5 5.f4 (5.b5 Bg4 6.Nf3 e6=) 5...ab4 6.ab4 Ra1 (6...Ra1 7.Ba1 Bg4=). DonSalvaje – Ultima.X, ChessWorld.net, 2020.

4.a3 d6 5.c4 e6 6.d4 ab4 7.ab4 Ra1 8.Ba1 d5 9.c5 b6 10.Nf3 bc5 11.dc5 Na6 (11...Qc7 12.Bd3+=) 12.Ba6 (better is 12.Qa4!? Nb8 13.Bd3+=) 12...Ba6= 13.Qa4 Bb5 14.Qa7 Ne4 (14...Qc8 15.Bf6 gf6 16.Nc3+=) 15.Nbd2 (15.Na3 Be7+/–) 15...Be7 (15...Nd2 16.Kd2 Be7 17.Nd4=) 16.Bg7 (16.Ne4 de4 17.Nd4+= (17.Bg7? ef3 18.gf3 Qd3–+)) 16...Rg8= 17.Be5 Rg2 18.Bg3 (18.Ne4 de4 19.Nd4+=) 18...f5 (better is 18...Bf6 19.Ne4 de4=) 19.Ne4+/– de4 (19...fe4 20.Nd4 Qc8 21.Nb5 cb5 22.Kf1 Rg3 23.hg3+– (23.fg3?! Bf6+–)) 20.Nd4 Kf7 21.Nb5 (21.Qb7!? h5 22.Nb5 (22.Nc6 Bc6 23.Qc6 Qd3–/+) 22...cb5 23.Qb5+/–) 21...cb5+= 22.Bd6 Kf6 23.Bg3 Kg6 (better is 23...Kf7!?=) 24.Qa2+/– Kf7 (24...Qd3 25.Qe6 Bf6 26.Qg8 Kh6 27.Bf4 Bg5 28.Qf8 Kg6 29.Qd6 Bf6 30.Qd3 ed3 31.c6 d2 32.Ke2+–) 25.Qd2 (better is 25.Qc2+–) 25...Qa8?? (25...Qd2!? 26.Kd2 h5+/–) 26.Ke2 (26.Kf1 Rg3 27.hg3 Qe8+–) 26...Bg5? (26...f4 27.Bf4 Qg8 28.Bg3 Qg4 29.Kf1+–) 27.Rd1 (27.Qd7 Be7 28.Kf1 Rf2 29.Bf2 Qd5 30.Qd5 ed5+–) 27...Kg6 (27...f4 28.Qd7 Be7 29.ef4+– (29.Bf4?? Qa2 30.Rd2 Qc4 31.Rd3 ed3 32.Kf3 Rg8–+)) 28.Qd6 Qa2 29.Kf1 Rf2 (29...Rg3 30.Qg3 Kh5+–) 30.Bf2 Qc4 (30...Qb3 31.Qd7 Be3 32.Be3 Qe3 33.Qe6 Kg5 34.Qg8 Kh5 35.Qg3 Qg3 36.hg3+–) 31.Kg2 Qa2 (31...h5 32.Qf8 h4 33.Qg8 Kf6 34.h3+–) 32.Qg3 (32.c6!? Be3 33.Qg3 Bg5+–) 32...Kf6 33.c6 Qc2 34.c7 f4 (34...Qd1 35.c8Q Qf3 36.Qf3 ef3 37.Kf3 Ke7+–) 35.ef4 Bh6 36.Qg8 (36.Qh4 Kg6 37.Qg4 Kf6 38.Rd6 Qa2 39.c8Q Qf2 40.Kf2 e3 41.Ke1 Kf7 42.Qge6 Kg7 43.Rd7#) 36...e3 37.Qh8 Kg6 38.Qg8 (38.f5!? Qf5 39.Qg8 Kh5 40.Qe8 Qg6 41.Qg6 hg6+–) 38...Kf6 39.Qh8 Bg7?? (39...Kg6 40.f5 Qf5 41.Qe8 Kf6 42.Bh4 Bg5+–) 40.Qd8+– Kg6 41.Qg5 Kf7 42.Rd7 (42.Rd7 Ke8 43.Qe7#) 1–0. Rush,Bradley – Jokmin,Guido, 56. LSS No Engine Cup Preliminary, 2011.

4.ba5 Qa5 5.Nf3 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Qa5 4.Nf3 Nf6 5.e3).

4.b5 d5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6).

4.b5 d5 5.c4 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a5).

4.b5 d6 5.d4 (5.Nf3 e5=) 5...Bf5 6.Nf3 e6 7.Be2 d5 (7...Be7 8.0-0=) 8.0-0 Nbd7 (8...Bd6 9.Ba3=) 9.c4 (9.Nh4 Be4+=) 9...cb5= 10.cd5 Nd5 11.Bb5 Nc7 12.Bd7 (12.Be2 Rc8=) 12...Qd7+= 13.Ne5 Qb5 14.Ba3 Bb4 15.Bb4 Qb4 16.a3 Qd6 17.Qf3 (17.Qb3 f6 18.Nc4 Qd5+–) 17...f6 (17...b5 18.Rd1=) 18.Nc4+= White gets in control 18...Qa6 19.Rc1 0-0 20.Nbd2 (20.e4 Bg6 21.Qg3 Nb5=+) 20...b5 21.Nb2 Rac8 22.a4 (22.Nb3 a4 23.Nc5 Qd6+=) 22...b4 23.Rc5 Na8 24.Nb3 Rc5 25.Nc5 Qa7 (25...Qd6 26.Nc4 Qc7 27.e4+/–) 26.e4+– Bg6 27.Ne6 Re8 28.Nc5 Nc7 29.Nbd3 Qb6 (29...f5 30.e5+/–) 30.Rd1 (30.Nf4 Bf7+–) 30...Ne6 31.Qe3 Nd8 (31...f5 32.Ne6 Qe6 33.Nc5+/–) 32.Nf4 Bf7 33.d5 (33.Rd2 Nb7 34.Nfd3 Nc5 35.Nc5 f5+/–) 33...Nb7 34.Nb7 Qb7 35.Nd3 f5 36.d6 (36.Nc5!? Qb8 37.d6 fe4 38.Ne4+/–) 36...fe4 37.Ne5! (37...Be6 38.Qc5+=). Van Rooijen,Peter – Sternik,Ryszard, corr or01–004 E–mail, 2001.

5.c4 cb5 6.cb5 d5 (6...e6 7.a3=) 7.Be2 (7.Nf3 e6=) 7...Nbd7 8.Nf3 e6 9.Qc1 Be7 10.0-0 0-0 11.Ba3 e5 12.Be7 Qe7 13.Qa3 Qa3 14.Na3 e4 15.Nd4 Nc5 16.b6 Ne6 (16...Bd7 17.Rfc1 Rfc8 18.Nab5 Bb5 19.Nb5=) 17.Rab1 (17.Ne6 fe6 18.Rfc1 e5=) 17...Nd4 18.ed4 Bf5 19.Nb5 Rfd8 20.Rfc1 e3 (20...Kf8 21.Rc7 Rd7 22.Rd7 Bd7 23.Nc7=) 21.d3 ef2 22.Kf2 Kf8 23.Rb4 a3 (23...Bd7 24.Nc7 Rdc8 25.Rc5+–) 24.Nc7 Rac8 25.Rc3 Ne8 (25...Ke7 26.Bf3+=) 26.Bf3 g5 27.Nd5 g4 28.Be4 Nd6 29.Rc7 Be4 (29...Be6 30.Kg3+–) 30.de4 Ne4 31.Ke3 Nd6 32.Kd3 Kg7 33.Ne3 h5 34.Ra4 Kg6 35.g3 (35.Nd5 Kg5+–) 35...f5 36.Ra5 h4 (36...Re8 37.Ra3 Ra8 38.Ra7+–) 37.gh4 (worse 37.Ra3 Nb5 38.Rc8 Rd4 39.Ke2 Na3 40.Rg8 Kf6 41.Rf8 Ke6 42.Nf5 Ra4+–) 37...Re8 38.Re5 (38.Ra3 Rcd8 39.Ra5 Ra8+–) 38...Rcd8 39.Nd5 (39.Re8 Re8 40.Rd7 Re6+–) 39...Kh6 (39...Re5 40.de5 Nc8 41.Kc4+–) 40.Ne7 Kh5 41.Re6 Nb5 42.d5 (42.Rb7?! Nd4 43.Re3 Nc6 44.Kc3 f4=) 1–0. Woelfelschneider,Peter – Giesselbach, 2009.

5.Nf3 d5 6.Be2 =.

6.Na3 Nbd7 7.Be2 Qc7 8.bc6 bc6 (worse is 8...Qc6 9.0-0+/–) 9.0-0 g6 10.c4 Bg7 11.Rb1 0-0 12.Nc2 (12.d4!?=) 12...Nc5+= 13.d3 Rb8 14.d4 (14.Bc3 Bf5 15.Nb4 Rb6+=) 14...Nce4–/+ 15.Na3 Be6 16.Qa4 Bf5 17.Nh4 Nd2 18.Nf5 gf5 0–1. zrenjanin (1960) – boyquayks (2225), gameknot.com, 2010.

6.d4 Bf5 7.Be2 =.

6.d4 g6 7.c4+= cb5 8.cb5 Nbd7 9.Bd3 Nb6 (9...Bg7 10.0-0+=) 10.0-0 Bg7 11.e4 (11.Nc3 0-0+=) 11...0-0 12.Qd2 (12.Re1 Bg4+=) 12...d5 (12...Bg4 13.Qe3+=) 13.e5 Ne4 (13...Nh5 14.Rc1+=) 14.Qe3 f5 15.Rc1 Be6 16.Na3 Qd7 17.Ne1 (17.Qe1 Rac8+=) 17...Nc4 (17...f4 18.Qe2=) 18.Nc4 (18.Bc4 dc4 19.f3 c3 20.Bc3 Nc3 21.Rc3 f4+=) 18...Qb5 19.Ba3 dc4 20.Rab1 Qd7 21.Bc4 (worse is 21.Be4 fe4 22.Qe4 b5+=) 21...Bc4 22.Rc4 Rfc8 (22...Rac8 23.Bc5=) 23.Rbc1 Rc4 24.Rc4 b5 25.Rc1 (25.Rc2 h6=) 25...Rd8 The backward pawn on d4 becomes a target (25...Qe6 26.Rc2=) 26.Nf3 Bf8 (26...Qe6 27.Qe2=) 27.Qd3 (27.Bb4 Rc8=) 27...e6 (27...Rc8 28.Rc8 Qc8 29.Qb5=) 28.Bf8 Rf8 29.Nd2 (29.a3 Rc8 30.Qf1 Nc3=) 29...Rd8 (29...Rc8 30.Rc8 Qc8 31.Ne4 fe4 32.Qb5 Qc1 33.Qf1=) 30.Ne4 fe4 31.Qe4 (31.Qe4 Qd4 32.Qd4 Rd4 33.Kf1=; 31.Qh3 Rc8 32.Rd1 Qd5=). aschellen (1790) – 99ways2die, internet, 2006.

6.Be2 e5 7.0-0 e4 8.Ne1 d5 =.

6.Be2 e5 7.0-0 Be7= 8.a3 (8.d4 e4 9.Nfd2 d5 10.c4 dc4 11.Bc4 a3 12.Bc3 cb5 13.Bb5; 8.c4 0-0 9.d4 e4 10.Nfd2 cb5 11.cb5 Be6 12.d5 Bd5 13.Nc3; 8.Na3 0-0 9.d3 Bg4 10.c4 Nbd7 11.Rb1 d5 12.bc6 bc6 13.cd5) 8...0-0 9.Nc3 e4 10.Ne1 d5 11.f3 Bd6 12.fe4 de4 13.bc6.

6.Be2 e5 7.c4 Be7 (7...e4 8.Nd4 d5 9.0-0 Bd6 10.d3 Qc7 11.h3 Qe7 12.Qc1 0-0 13.cd5; 7...cb5 8.cb5 Be7 9.a3 Be6 10.d4 e4 11.Nfd2 0-0 12.Nc3 Qa5 13.d5; 7...Nbd7 8.0-0 (8.a3 e4 9.Nd4 c5 10.Nc2 Ne5 11.d4 ed3 12.Bd3 Be6 13.Qe2; 8.d4 e4 9.Nfd2 cb5 10.cb5 d5 11.Ba3 Ba3 12.Na3 0-0 13.Rc1; 8.Na3 Be7 9.0-0 0-0 10.d4 Qc7 11.Qc2 c5 12.Bd3 cd4 13.ed4) 8...Be7 9.a3 cb5 10.cb5 Nb6 11.d4 e4 12.Nfd2 d5 13.Nc3) 8.0-0 (8.d4 e4 9.Nfd2 0-0 10.0-0 d5 11.bc6 Nc6 12.cd5 Nb4 13.Nc3; 8.Qc2 0-0 9.d4 a3 10.Bc3 e4 11.Nfd2 d5 12.c5 cb5 13.Bb5; 8.a3 e4 9.Nd4 0-0 10.Nc3 c5 11.Nc2 Nbd7 12.d3 ed3 13.Bd3; 8.Ng5 h6 9.Nf3 e4 10.Nd4 d5 11.0-0 c5 12.Nc2 dc4 13.Nba3) 8...0-0 9.d4 e4 10.Nfd2 cb5 (10...d5 11.bc6 Nc6 12.cd5 Nb4 13.Nc3) 11.cb5 d5 (11...Bf5 12.a3 Nbd7 13.Nc3) 12.Ba3 Ba3 (12...Bf5 13.Be7) 13.Na3 Qd6 14.Qc1 (14.Nc2 Be6=) 14...Bg4+= 15.Re1 Be2 16.Re2 Nbd7 17.Qb2 Ng4 (17...Rfc8 18.Rc1+=) 18.Nf1 f5 19.h3 Nh6 20.Rc1 Nb6 21.Rc5 g5 Black intends f4 (21...f4 22.ef4 Nd7 23.Rcc2=) 22.f3 (22.Rec2 g4=) 22...Rae8 23.Nb1 (23.Qc3 ef3 24.gf3 Rf7+=) 23...ef3+= 24.gf3 Nd7 25.Rcc2 f4 26.e4 de4 27.fe4 f3 28.Re3 g4 29.Qc3 (29.Nbd2 gh3 30.Rf3 Rf3 31.Nf3 Qg6 32.Kh1 Qe4–/+) 29...Qg6 30.Ng3 gh3 31.Rf3 Re4 32.Rf8 (32.Rcf2!?–/+) 32...Nf8–+ 33.Nd2 (better is 33.Kh1 Rg4 34.Kh2 Rd4 35.Qd4 Qc2 36.Nd2 Qa2 37.Nge4–+) 33...h2 34.Kg2 (34.Kh2 Ng4 35.Kg1 Re1 36.Ndf1 Rf1 37.Kf1 Qc2 38.Qc2 Ne3 39.Kf2 Nc2 40.Ne2–+) 34...Re2 35.Kf1 (35.Kh1 Re1 36.Ndf1 Rf1 37.Kh2 Ng4 38.Kg2 Qc2 39.Qc2 Ne3 40.Kh3 Nc2 41.Nf1 Nd4 42.Nd2–+) 35...h1Q (35...h1Q 36.Ke2 Qg4 37.Kf2 Qh2 38.Ke1 Qhg3 39.Qg3 Qg3 40.Kd1 Nf5–+) 0–1. Campora,Daniel Hugo (2525) – Cheparinov,Ivan (2570), XI Open, Coria del Rio BRA, 2005.

6.Bf6 ef6 7.c4 Be7 =.

5.Bb5 Qb6 A) 6.a4 Nc6 (6...e6 7.Na3 Nc6 8.Nc4 Qc7 9.Nf3 Be7 10.0-0 0-0 11.h3 d5; 6...h5 7.Na3 Ne4 8.Ne2 Nc6 9.Nc4 Qd8 10.f3 Ng5 11.Nf4 h4 ; 6...h6 7.Na3 Nc6 8.Nc4 Qc7 9.Nf3 d6 10.0-0 Bd7 11.Qe2 e6) 7.Nf3 e6 8.0-0 Bc5 9.d4 Be7 10.c4 0-0 11.c5 Qc7; B) 6.Nc3 Nc6 (6...Na6 7.Nf3 Nc7 8.a4 Nb5 9.Nb5 d6 10.0-0 Bd7 11.c4 h5; 6...e6 7.Nge2 Nc6 8.a4 d5 9.Nf4 Bd6 10.Ba3 Ba3 11.Ra3 0-0; 6...a4 7.Ba3 Nc6 8.Rb1 e6 9.Bf8 Rf8 10.Nf3 a3 11.0-0 Qc5; 6...e5 7.Nf3 Nc6 8.0-0 e4 9.Nh4 Bb4 10.a4 0-0 11.f3 d5; 6...h5 7.Nf3 Nc6 8.0-0 e6 9.a4 Be7 10.Ne2 0-0 11.Nf4 g6) 7.Nf3 e6 8.0-0 Be7 9.a4 0-0 10.Rb1 d5 11.Bd3 Bd7; C) 6.Qe2 Nc6 (6...Na6 7.Nf3 Nc7 8.Nc3 a4 9.0-0 a3 10.Bc1 Qc5 11.Bc4 d5; 6...e6 7.Nf3 Nc6 8.0-0 Be7 9.c4 0-0 10.Nc3 d6 11.h3 Bd7 ; 6...g6 7.Nf3 Bh6 8.g4 Nc6 9.g5 Na7 10.Na3 Nb5 11.Nb5 Bg5; 6...h6 7.Nc3 Nc6 8.Nf3 e6 9.0-0 Be7 10.e4 0-0 11.e5 Nd5; 6...a4 7.Bd4 Qc7 8.Nf3 Qc2 9.Na3 Qc7 10.Nc4 Nc6 11.Bb6 Qb8; 6...Ne4 7.Nf3 Na6 8.Nc3 Nc7 9.Ne4 Qb5 10.Qb5 Nb5 11.c4 Nc7; 6...e5 7.Nf3 Nc6 8.Ne5 Be7 9.0-0 0-0 10.Ng4 Nb4 11.Na3 d5) 7.Nf3 e6 8.0-0 Be7 9.c4 0-0 10.Nc3 d6 11.d4 Bd7; D) 6.c4 Nc6 (6...e6 7.Nf3 Nc6 8.Nc3 Be7 9.0-0 0-0 10.Qb3 Qc7 11.Ba4 h6; 6...Na6 7.Nf3 Nb4 8.Bd4 Qc7 9.0-0 e6 10.Nc3 Nc6 11.Qc2 Nd4; 6...h6 7.Nf3 Nc6 8.Nc3 e6 9.Na4 Qa7 10.0-0 Be7 11.Ne5 0-0; 6...Qc5 7.Nf3 Nc6 8.0-0 Qh5 9.Nc3 e6 10.d4 Bd6 11.e4 Bb4; 6...a4 7.Nf3 Nc6 8.0-0 e6 9.a3 Be7 10.Nc3 0-0 11.Qc2 h6; 6...g6 7.Nf3 Nc6 8.Nc3 Bg7 9.Nd5 Qd8 10.0-0 0-0 11.Qb3 d6; 6...Qd6 7.Nc3 Nc6 8.Nf3 b6 9.0-0 Bb7 10.d4 Rc8 11.g3 h5; 6...h5 7.Nf3 Nc6 8.Nc3 e6 9.0-0 Be7 10.d4 0-0 11.c5 Qd8) 7.Nf3 e6 8.Nc3 Be7 9.0-0 0-0 10.d4 d6 11.Qd2 Bd7.

5.Bb5 Nc6 A) 6.Nc3 d5 (6...e6 7.Nh3 d5 8.Nf4 Bd7 9.0-0 Bd6 10.Bd3 Nb4 11.Be2 0-0; 6...g6 7.Nge2 Bg7 8.0-0 0-0 9.a4 d5 10.h3 Bf5 11.Ng3 Bd7; 6...a4 7.a3 Qb6 8.Rb1 e5 9.Nf3 e4 10.Nh4 d5 11.0-0 Bd6) 7.Qe2 e6 8.Nf3 Bc5 9.0-0 0-0 10.a4 Bd7 11.Ba3 Bb4; B) 6.Ne2 g6 (6...e5 7.0-0 Be7 8.Bc6 dc6 9.Be5 0-0 10.Nbc3 Ng4 11.Bf4 Bf6; 6...Qb6 7.Nbc3 e5 8.0-0 Be7 9.Ng3 d6 10.Nh5 Nh5 11.Qh5 0-0; 6...d5 7.0-0 e6 8.c4 Bd6 9.Nbc3 0-0 10.Rc1 Bd7 11.cd5 ed5; 6...a4 7.0-0 d5 8.Bd4 Bd7 9.Bf6 gf6 10.Nbc3 e6 11.Ba4 Bd6) 7.c4 Bg7 8.Nbc3 0-0 9.Nf4 d6 10.0-0 Bf5 11.d3 e5; C) 6.Nf3 g6 (6...a4 7.0-0 e6 8.a3 Be7 9.Nc3 0-0 10.Qe2 d5 11.Ba4 Bd7; 6...b6 7.0-0 e6 8.Nc3 Bb4 9.a3 Bd6 10.Bd3 0-0 11.Nb5 Bc5; 6...e6 7.Nc3 d5 8.Bd3 Bc5 9.0-0 0-0 10.Nb5 Ne4 11.a4 Bd7; 6...Qb6 7.a4 e6 8.0-0 Bc5 9.d4 Be7 10.c4 0-0 11.c5 Qc7) 7.0-0 Bg7 8.Na3 0-0 9.Nc4 Qc7 10.d3 d5 11.Nce5 Ng4.

5.Bb5 g6 A) 6.Nf3 Nc6 (6...Bg7 7.Nc3 0-0 8.0-0 Nc6 9.a4 d5 10.h3 Bf5 11.Nh4 Bd7) 7.c4 Bg7 8.Nc3 0-0 9.0-0 d6 10.d3 Bf5 11.e4 Bd7; B) 6.c4 Nc6 (6...Bg7 7.Nc3 0-0 8.Nf3 Nc6 9.0-0 d5 10.Rc1 Bg4 11.d4 Na7) 7.Ne2 Bg7 8.Nbc3 0-0 9.Nf4 d6 10.0-0 Bf5 11.d3 e5; C) 6.Nh3 Nc6 (6...Bg7 7.c4 Nc6 8.Nc3 0-0 9.Nf4 d6 10.0-0 Bf5 11.d3 e5) 7.Nc3 d5 8.Ng5 Bg7 9.0-0 0-0 10.a4 Bf5 11.Bd3 Ne4; D) 6.g4 h6 7.Nc3 Nc6 8.Nd5 Bg7 9.Bf6 Bf6 10.Nf6 ef6 11.Ne2 b6; E) 6.Bf6 ef6 7.Nc3 Nc6 8.Nf3 Ba3 9.0-0 0-0 10.Qb1 d6 11.Qb3 Bb4; F) 6.f4 Nc6 (6...Bg7 7.Nf3 Nc6 8.c4 0-0 9.Nc3 d6 10.0-0 Bf5 11.Qb3 Bd3; 6...Qb6 7.Nc3 Nc6 8.Nf3 Bg7 9.0-0 0-0 10.Ne5 d6 11.Nc4 Qc7; 6...Na6 7.Nf3 Bg7 8.Nc3 0-0 9.0-0 d5 10.Ne5 Nc5 11.Qf3 Bf5) 7.Nc3 Bg7 8.Nf3 0-0 9.0-0 d5 10.a4 Bf5 11.Bd3 Ne4; G) 6.Nc3 Nc6 (6...Bg7 7.f4 Nc6 8.Nf3 0-0 9.0-0 d5 10.a4 Bf5 11.Bd3 Ne4) 7.Nd5 Bg7 8.Nf6 ef6 9.Ne2 0-0 10.Nf4 d5 11.a4 Bg4.

6.a4 Nc6 (6...e6 7.Nc3 Nc6 8.Nh3 Bb7 9.0-0 Bd6 10.f4 0-0 11.Ng5 h6; 6...Bb7 7.Nf3 Nc6 8.Nc3 e6 9.0-0 Bb4 10.Bd3 0-0 11.Nb5 Bc5; 6...Qc7 7.Nf3 Nc6 8.0-0 e6 9.Nc3 Nb4 10.Be2 Ba6 11.Ba6 Ra6; 6...g6 7.Nf3 Bg7 8.0-0 Nc6 9.Na3 0-0 10.Nc4 Bb7 11.Qe2 Qc7; 6...Ba6 7.Nc3 Nc6 8.Ba6 Ra6 9.Nf3 e6 10.0-0 Be7 11.Qe2 Ra8; 6...h6 7.Nf3 Bb7 8.0-0 Nc6 9.Na3 Ne4 10.Qe2 Rc8 11.d3 Nd6) 7.Nc3 e6 8.Nf3 Be7 9.0-0 0-0 10.Qe2 Bb7 11.e4 Qc7.

6.Nc3 Nc6 (6...e6 7.Nf3 Nc6 8.0-0 Bb4 9.a3 Bd6 10.Qe2 Bb7 11.Bd3 0-0; 6...Bb7 7.Nf3 e6 8.0-0 Nc6 9.e4 Qc7 10.Re1 Bb4 11.e5 Ng4; 6...Ba6 7.Nf3 Nc6 8.a4 Bb5 9.Nb5 e6 10.Be5 Rc8 11.0-0 Be7; 6...g6 7.Nd5 Nc6 8.Qf3 Bg7 9.Nf6 Bf6 10.Bf6 ef6 11.Bc6 dc6) 7.Nge2 Bb7 8.0-0 e6 9.Nf4 Bd6 10.Bd3 0-0 11.Nb5 Be5.

6.c4 Nc6 (6...Bb7 7.Nf3 e6 8.Nc3 Nc6 9.0-0 Be7 10.Ne2 0-0 11.Nf4 Qc7; 6...e6 7.Nc3 Nc6 8.Nf3 Bd6 9.0-0 0-0 10.Ba4 Ba6 11.Nb5 Bb5) 7.Nf3 e6 8.Nc3 Bb7 9.0-0 Bd6 10.Ba4 0-0 11.Nb5 Qb8.

6.Ne2 Bb7 (6...Nc6 7.0-0 Bb7 8.Nbc3 e6 9.Nf4 Bd6 10.Bd3 0-0 11.Nb5 Be5; 6...e6 7.Nf4 Nc6 8.0-0 Bb7 9.Na3 Be7 10.Nc4 0-0 11.Rb1 Qc7; 6...Qc7 7.Na3 Nc6 8.0-0 Bb7 9.f3 e6 10.Nc4 Be7 11.a4 0-0; 6...Ba6 7.Nbc3 Nc6 8.0-0 e5 9.d4 Bb4 10.Ba6 Ra6 11.d5 Ne7) 7.0-0 Nc6 8.Nbc3 e6 9.Ng3 Be7 10.Qf3 0-0 11.Nce4 d5.

6.Nf3 Ba6 7.Nc3 g6 (7...e6 8.0-0+= (8.Qe2 Bb5 9.Nb5 Nc6 10.0-0 Be7 11.a4 0-0) 8...Nc6 9.Ba6 Ra6 10.Qe2 Ra8 11.a4 Bc5) 8.Rb1 (8.0-0 Bb5 9.Nb5 Nc6 10.Bf6 ef6 11.d4 Na7) 8...Bg7 (8...Bb5 9.Nb5 Nc6 10.Bf6 ef6 11.0-0 Be7) 9.Ba6 (9.Qe2 0-0 10.0-0 Bb7 11.Ba3 Nc6) 9...Na6 10.Nd5 (10.Na4 Rb8 11.Bd4 b5) 10...Rb8 (10...Nb4 11.Bf6 Bf6) 11.Qe2 Nc7 (11...Nb4+/–) 12.Nf6 Bf6 13.0-0 Bb2 14.Rb2 0-0 15.Rfb1 Na8 16.h4 d5 17.h5 h6 18.hg6 fg6 19.Ne5 Qd6 20.d4 Rb7 21.c4 Rf6 (21...dc4!? 22.Nc4 Qf6+/–) 22.c5! Qc7 (22...bc5 23.Rb5 Double attack (23.Rb7 Pinning; 23.Rb7 Deflection; 23.Rb5 Decoy)) 23.Qb5 Kg7 24.c6 Ra7 25.Qd5 Qd6 26.Qb5 (26.Qd6 Rd6 (26...ed6?? 27.Nd7+–) 27.Rc1 Rc7+–) 26...Rc7 27.Qa6 Qd8 28.Rd2 Rfc6 29.Nc6 Rc6 30.d5 Rd6 31.e4 e6? (31...Nc7 32.Qb7 Na8 33.Rc2+–) 32.Rbd1 (better is 32.Qb7 Nc7+–) 32...Nc7 33.Qc4 (better is 33.Qa7 Kg8 34.Rc2+–) 33...b5? (better is 33...ed5 34.ed5 Ne8+–) 34.Qc3 Kg8 (34...e5+–) 35.de6 b4 (35...Ne8 36.Rd6 Nd6 37.Qe5+–) 36.Qb3 (36.Qb3 Rd2 37.e7 Qd5 38.ed5+–) 1–0. Chirpii,Alexandru (1975) – Sheremet,Stanislav, Sun Pawn Open, Ilichevsk UKR, 2007.

6.Nf3 Bb7 7.Na3 Nc6 8.Nc4 e6 9.Rb1 Bc5 10.0-0 Rc8 11.Bf6 gf6.

6.Nf3 Nc6 7.Nc3 e6 8.0-0 Bb4 9.Qe2 Bb7 10.a3 Be7 11.e4 0-0.

6.Nf3 e6 7.Na3 Nc6 8.Nc4 Ba6 9.a4 Bb5 10.ab5 Nb4 11.0-0 Qc7.

6.f4 Nc6 (6...e6 7.Nc3 Nc6 8.Nf3 Be7 9.0-0 0-0 10.a4 Bb7 11.Qe2 h6; 6...Bb7 7.Nf3 Nc6 8.0-0 e6 9.Nc3 Bd6 10.Ng5 0-0 11.Nce4 Ne4; 6...g6 7.Nf3 Nc6 8.Nc3 Bg7 9.0-0 0-0 10.a4 Bb7 11.Qe2 Nb4; 6...Ba6 7.Nc3 Nc6 8.Nf3 Bb5 9.Nb5 e6 10.0-0 Be7 11.c4 0-0) 7.Nf3 Bb7 8.0-0 e6 9.Nc3 Bd6 10.Bc4 0-0 11.a4 Bb4.

6.Nh3 Nc6 (6...Bb7 7.0-0 e6 8.Nc3 Nc6 9.Ng5 Be7 10.Nce4 0-0 11.Qf3 d5 ; 6...e6 7.0-0 Nc6 8.Nf4 Bb7 9.Na3 Be7 10.Nc4 0-0 11.Rb1 Qc7; 6...Ba6 7.Nc3 e5 8.Ng5 Bb5 9.Nb5 Nc6 10.0-0 Be7 11.f4 ef4; 6...g6 7.Nc3 Nc6 8.Nf4 Bg7 9.0-0 0-0 10.Qf3 Bb7 11.a4 Qb8; 6...Na6 7.Qf3 Rb8 8.Ng5 Nc7 9.Na3 h6 10.Ne4 Ne4 11.Qe4 Bb7; 6...Qc7 7.Nc3 Bb7 8.0-0 Nc6 9.a4 Ne5 10.Qe2 Rc8 11.Nf4 Nc4; 6...a4 7.a3 Nc6 8.Nc3 e6 9.0-0 Bb7 10.Ng5 Be7 11.Qf3 0-0) 7.Nc3 e6 8.Ng5 h6 9.Nge4 Be7 10.0-0 0-0 11.a4 Bb7.

4.a3 d5 5.Bd4 (5.Nf3 Nbd7 6.c4 e6 (6...a5 7.c5 Qc7 8.d4 b6 9.Bd3 Ba6) 7.c5 Qc7 8.d4 b6 9.Bd3 a5) 5...Qc7 6.f4 Bf5 7.Nf3 e6 (7...a5 8.Be2 ab4 9.ab4 Ra1) 8.Nc3 (8.Bf6 gf6 9.Nd4 Bg6= (9...Be4=)) 8...Bd6 (8...Nbd7 9.Be2= (9.Bd3 Bd3) 9...a5) 9.Nh4 (9.Be2 a5 10.Nh4 Bg6=) 9...Bg6 (9...Bg4 10.Be2 Be2 11.Qe2=) 10.Bf6 (10.Be2 a5=) 10...gf6 11.Be2 Nd7 12.g4 (12.g3 0-0-0=) 12...f5 (12...d4 13.Ng6 hg6 14.Ne4+=) 13.gf5 Bf5 (better is 13...Qd8!? 14.Nf3 Bf5+=) 14.Nf5+= ef5 15.Bh5 (15.Bd3!?+=) 15...Nf6= 16.Bf3 0-0-0 (16...Ne4+=) 17.Qe2 (17.Ne2 Qe7=) 17...Rde8 (17...d4 A) 18.ed4?? Rhe8–+ (18...Bf4?! 19.Qd3+=); B) 18.Nd1 de3 19.Ne3 Bf4 20.Rb1–+) 18.0-0-0? (18.b5!? d4 19.Nd1 de3 20.Ne3 Bf4 21.bc6 bc6 22.0-0-0–/+) 18...Bf4 (18...d4 19.Nb1 de3 20.Qd3 Bf4 21.Qf5 Re6 22.Rhe1–+) 19.Qd3 Bd6 (better is 19...Bh2!? 20.Qf5 Re6–/+) 20.Qf5= Nd7 21.Qf7 Ref8 (21...a5 22.Na2=) 22.Qh5= Nf6 23.Qh3 Kb8 24.Be2 (24.Rdf1 Rhg8=) 24...Nd7 (24...a5 25.Qh4=) 25.Rdg1 (25.Rdf1 Rf1 26.Rf1 Nf8+= (26...Bh2?? 27.Rf7+–)) 25...Be5 (better is 25...Nf6!?=) 26.d4+/– Bd6? (better is 26...Bf6+/–) 27.Na4?? (better is 27.Rg7 Rd8 28.Bg4+– (28.Rh7?! Rh7 29.Qh7 a5+/–)) 27...Nf6+= 28.c4 (28.Bd3 Re8=) 28...dc4 (28...Ne4 29.Qh6=) 29.Nc5 (29.Qh6!?=) 29...Bc5+= 30.dc5 Ne4 31.Rf1?? (31.Qh6 Nf2 32.Rf1 Qe5–/+) 31...Nf2 (better is 31...Qe5 32.Kb1 Nc3 33.Kc2 Ne2 34.Rf8 Rf8–+) 32.Qh6–/+ Qe5 33.Kc2 Qe4 (33...Rf6 34.Qg7 Rd8 A) 35.Bc4?? Qe4 36.Kb3 A1) 36...Nh1? 37.Qf6 (37.Rf6?! Qb1 38.Ka4 Qc2 39.Bb3 Qe2=) 37...Qe3 38.Ka4+–; A2) 36...Qe3 37.Ka4 Rf3 38.Qb2–+; A3) 36...Rf3–+; B) 35.Qg3 Rd2 36.Kd2 Ne4 37.Kc2 Ng3 38.hg3 Qe3 39.Bc4 Rf2 40.Rf2 Qf2 41.Kb1 Qg3 42.Rf1–+) 34.Kc3 Qe5 (34...Nh1? 35.Rf8 Rf8 36.Qf8 Kc7 37.Qg7 Kd8 38.Qg5 Qe7 39.Qf4 Qg7 40.Kc4 Qg8 41.Kc3 Qg7 42.Kb3+–) 35.Kc4?? (better is 35.Kc2=) 35...Qd5 (better is 35...Rf6 36.Qh5 Qe6 37.Kc3 Qe3 38.Kc2 Qe4 39.Kc1–+) 36.Kc3 Ne4 37.Kb2 Qd2 38.Ka1? (38.Kb3 Re8 39.Qf4 Ka8 40.Rc1 Qe2 41.Rc2 Qd3 42.Kb2–+) 38...Rf1 (better is 38...Qc3 39.Ka2 Rd8 40.Qf4 Ka8–+) 39.Bf1?? (better is 39.Rf1 Qc3 40.Ka2 Qc2 41.Ka1–+) 39...Qc1 (39...Rd8 40.Qf4 Ka8 41.Bd3 Qd3 42.Qf7 Qc3 43.Kb1 Nd2 44.Ka2 Nc4 45.Qb7 Kb7 46.Rd1 Qb2) 40.Ka2 Qc2 41.Ka1 Nc3 (better is 41...Rd8 42.Qf4 Ka8–+) 42.Bc4?? (better is 42.Qd6 Ka8 43.Bc4=) 42...Rd8–+ 43.Qf4 Ka8 44.e4 (44.Qf6 Rd1 45.Rd1 Qd1 46.Kb2 Qb1 47.Kc3 Qa1 48.Kc2 Qf6 49.Bb3–+) 44...Na4 (44...Rd1 45.Rd1 Qd1 46.Kb2 Na4 47.Ka2 Qc2 48.Ka1 Qb2) 45.Qc1–/+ Qe4 46.h4 Qd4 47.Ka2 Nc3 48.Kb3 Ne4 49.Qc2?? (better is 49.Ka2–/+) 49...Nd2 (49...Qe3 50.Ka2 Rd2 51.Rc1–+) 50.Ka4 (50.Ka2 Nc4 51.Rc1–+) 50...Nc4 51.Qh7 (51.Rc1 b5 52.cb6 Nb6 53.Kb3 Qe3 54.Ka2–+) 51...b5 52.cb6 Nb6 53.Kb3 Qe3 54.Ka2 Rd2 55.Kb1 Qb3 56.Kc1 Qb2 0–1. jammboy – Bull_Dog_Baz, ChessWorld.net, 2009.

4.a3 d6 5.f4 =.

4.Bf6 ef6 5.a3 d5 6.Be2 Bd6 7.Nf3 0-0 8.c4 (8.0-0 Re8=) 8...dc4+= 9.Bc4 Bg4 (9...a5 10.ba5 Qa5 11.0-0+=) 10.Nc3= Nd7 11.h3 Bh5 12.Ne4 Bb8 13.d4 Re8 14.Ned2 a5 15.Qb3 (15.Rb1!?=) 15...ab4–/+ 16.0-0 ba3 17.Qa2? (better is 17.Ra3!? Bd6 18.Ra8 Ra8 19.Qc2+=) 17...Qc7 18.g4 (18.Rfb1–+) 18...Bg6 19.Kg2 Nb6 20.Bb3 Qd7 21.Nh4 Nd5 22.Ng6 hg6 (22...fg6?! 23.e4 Ra5 24.Rfe1=) 23.Qc2?? (23.Bd5 Qd5 24.Qd5 cd5 25.Rfb1–/+) 23...Qd6 (better is 23...Re3 24.Rh1 Nf4 25.Kf1 Qd4 26.fe3 Qa1 27.Qb1 Qb1 28.Nb1–+) 24.Nf3 (24.Bd5 Qh2 25.Kf3 Qh3 26.Ke2 cd5 27.Qb3–+) 24...Re3! 25.Bd5 (25.fe3 Ne3 Double attack (25...Qg3 Decoy)) 25...Rf3 26.Bf7 Kf7 27.Kf3 Qd4 28.Qb3 (28.Kg2!? Qd6 29.Rh1 Qd5 30.f3–+) 28...Qd5–+ 29.Qd5 cd5 30.Rfd1 Be5 31.Ra2 Ke6 32.Ke3 b5 33.Kd3 (33.Rb1 Ra5–+) 33...Bb2 (33...b4 34.Kc2–+) 34.Kc2 Rc8 35.Kb3 Rc4 36.Rd2 b4 37.Re2 Kd6 38.Re8 Re4 (38...Bc3 39.Rb8–+) 39.Rb8 (39.Re4 de4 40.Kb4 Ke5–+) 39...Ke5 40.Rb7 (40.Rb4 Rb4 41.Kb4 d4–+) 40...d4 (40...Bc3 41.Rg7 g5 42.Re7 Kd4 43.Re2–+) 41.Rb4 (41.Rg7 Bc3 42.Re7 Kf4–+) 41...d3 (41...Rf4 42.Rb7–+) 42.Rb5 Kd6 43.Rb8? (better is 43.Rb2 ab2 44.Kb2 Re2 45.Kc3–+) 43...Kc7 44.Rb5 (44.Ra8 Rd4 45.R8a3 d2 46.Ra7 Kd6 47.R7a6 Ke5 48.R6a5 Ke4 49.Rb2 d1Q 50.Ka2 Qf1 51.f3 Kf3 52.Ra3 Ke4–+) 44...Rd4 45.Ra3 Ba3 46.Ka3 d2 (46...d2 47.Rb1 d1Q 48.Rd1 Rd1–+) 0–1. mikebaldini (1635) – mr5reasons1 (1765), gameknot.com, 2015.

5.b5 d5 6.c4 Bf5 7.Nc3 e6 8.Nf3 Be7 9.Nd4 Bg6 10.Na4 Qc7 11.bc6 bc6 12.cd5 ed5 13.Rc1 Qb7 14.Qb3 Qb3 15.Nb3 0-0 (15...Ra7 16.Bd4 Rc7 17.Be5+/–) 16.Nbc5 (16.Nd4 Nfd7 17.Nc6 Nc6 18.Rc6 Rfb8+/–) 16...Ne4 17.Be2 Ra7 18.Bd4 Nc5 19.Bc5 Bc5 20.Rc5 Rc8 21.d4 Nd7 22.Rc3 f5 23.Kd2 Nf6 24.f3 Be8 (24...Re7!?+/–) 25.Rb1 Kf8 26.Bd3 g6 27.Nc5 Ke7 28.h4 Rcc7 29.Kc2 Bd7 30.Rb6 Bc8 31.Rb1 Ne8 (31...Bd7 32.g3 Bc8+/–) 32.Rh1 Kd6 33.h5 g5 34.e4 fe4 35.fe4 Rf7 36.e5 Ke7 37.Rf1 Rf1 38.Bf1 Bf5 (38...Ng7!?+/–) 39.Kd2+– Ng7 40.h6 Nh5 41.Na6 (41.g3 g4+–) 41...Kd7? (better is 41...Rb7+=) 42.Nb8+– Ke8 43.Rb3 (better is 43.Nc6!? Ra8 44.a4+–) 43...Rc7 44.Na6 Rf7 45.Rb8 Ke7 46.Rb7 Kf8 47.Rf7 Kf7 48.Nb8 g4 49.Nc6 a4 50.Ke3 Be4 51.Be2 Bf5 (51...Kg6 52.Bg4 Kh6 53.Kf2+–) 52.Bd1 Kg6 (52...Ke6 53.Na7+–) 53.Ne7 Kg5 54.Nf5 Kf5 55.Ba4 Nf4 56.g3 Nh5 57.Bc2 Kg5 58.a4 (worse is 58.Bh7 Kh6 59.Bd3 Ng3+–) 58...Ng3 (58...Kh6 59.a5 Ng7+–) 59.a5 Nf1 60.Ke2 Nh2 (60...Nd2 61.Kd2 g3 62.Be4 (62.Bh7?? g2–+) 62...de4 63.Ke2+–) 61.Kf2 (better is 61.a6 Nf3 62.a7 Nd4 63.Kd1 Kh6+–) 61...Nf3 62.a6 Kf4 (62...Nd4 63.a7 Nc2 64.a8Q+–) 63.Bd1 g3 64.Kg2 Nh4 (64...Nd4 65.a7 Nf5 66.a8Q Nh4 67.Kh1+–) 65.Kg1 1–0. Steffens,Olaf – Nordenbaek,Jan, Odense DEN, Open, 2013.

5.c4 ab4 6.c5 Qc7 7.ab4 Ra1 8.Ba1 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.c4 ab4 5.c5 Qc7 6.ab4 Ra1 7.Ba1 Nf6 8.e3).

5.c4 ab4 6.Bd4 Qc7 7.ab4 Ra1 8.Ba1 g6 (8...e5 9.Nf3 d6 10.Bc3=) 9.Nf3+= Bg7 10.Be2 0-0 11.0-0 d6 12.d4 Nbd7 13.Nc3 White plans b5 13...b6 14.b5 Bb7 15.Bb2 Ra8 16.bc6 Bc6 17.Qb3 Qc8 18.Nd2 h6 19.Rb1 Ra5 20.Bf3 Bf3 21.Nf3 Qa8 22.Nd2 Bf8 23.Nb5 Ne4 24.Ne4 Qe4 25.Bc3 Ra8 26.Bb4 Nf6 27.Be1 Rc8 28.f3 Qf5 29.e4 Qd7 30.Na3 Qa7 31.Nb5 Qb7 (31...Qd7!?=) 32.Bf2 Nd7 33.g3 Bg7 34.Qd3 Ra8 35.Rb3 Ra1 36.Kg2 g5 37.h3 Qc8 38.Qc3 Ra2 39.Ra3 Ra3 40.Na3 Qa6 ½–½. Barlag,Christoph (2110) – Kolthoff,Siegmund (2190), Werther Schloss op–A, 2006.

5.c4 d5 6.c5 Qc7 7.Nf3 Bg4 8.h3 Bf3 9.Qf3 ab4 10.ab4 Ra1 11.Ba1 Nbd7 12.Be2 g6 13.0-0 Bg7 14.Nc3 0-0 15.d4 Ra8 16.Bb2 e5 17.Ra1 (17.Qg3!?=) 17...Ra1+= 18.Ba1 e4 19.Qg3 Qg3 20.fg3 h5 21.b5 Nb8 22.Na2 Nfd7 23.Bc3 cb5 24.Bb5 Nc6 25.Kf2 Kf8 (better is 25...Ndb8!?=) 26.Bc6 bc6 27.Ba5 Ke8 28.Nb4 Nc5 29.dc5 Kd7 30.Nc2 Ke7 31.Nd4 Kd7 32.Bb6 Be5 1–0. Kesmaecker,Philippe (2275) – Pedersen,Jacob Bang (2160), NATO–chT, 1999.

5.c4 d6 6.Qb3 Nbd7 (6...ab4 7.Qb4 Qc7 8.d4=) 7.d4 e5 8.Nf3 (8.Nc3 ab4 9.ab4 Ra1 10.Ba1 e4=) 8...e4 (8...ab4 9.ab4 Ra1 10.Ba1=) 9.Nfd2 ab4 10.ab4 Ra1 11.Ba1 d5 12.b5 Nb8 (12...Be7 13.Nc3=) 13.Nc3 (13.Be2 Be6=) 13...Qa5 14.Bb2 Bb4 15.Be2 (worse is 15.cd5 Nd5 16.Ncb1 Be6=) 15...Be6 (15...0-0 16.0-0 (16.cd5 Nd5 17.Nde4 Be6+=) 16...Bc3 17.Bc3+=) 16.0-0 Bc3 (16...cb5 17.c5 Nc6 18.Bb5 Bc3 19.Bc3+/–) 17.Bc3 Qc7 18.Bb4 (18.bc6 Nc6 19.Rb1 Nd8+/–) 18...Kd7 (18...cb5 19.cd5 Bd5 20.Bb5 Nc6 21.Qa3+/–) 19.f3 (19.Bc5+/–) 19...Rc8 (19...ef3 20.Nf3 dc4 21.Bc4 Bc4 22.Qc4 Ke8+–) 20.fe4+– de4 21.bc6 (21.Qb1 Re8+–) 21...bc6 22.Rf6 (22.Bc3 Kd8+–) 22...gf6+/– 23.Ne4 Qd8? (better is 23...f5 24.Nc5 Ke8+–) 24.d5 Bf5 25.dc6 (better is 25.Nc5!? Ke8 26.Nb7 Qc7 27.Nd6 Kd7 28.Nf5 Rd8+–) 25...Rc6 (25...Nc6 26.Qd1 Kc7 27.Bd6 Kb7 28.Nc5 Ka7+–) 26.Nc5?? (better is 26.Qd1 Ke8 27.Nd6 Rd6 28.Bd6+–) 26...Ke8+= 27.Bf3 (27.Qa4 Qe7 28.Kf2 Bd7+=) 27...Rd6 (27...Rb6 28.Bd5+=) 28.Bd5 (28.Nb7 Rd3 29.Qb2 Qb6 30.Nd6 Rd6+–) 28...Qc7 (28...Rb6 29.e4 Be6 30.Qa3+=) 29.Qa4+/– Bd7 30.Qc2 (better is 30.Qa5 Qb6 31.Qa3+/–) 30...f5? (better is 30...Qb6!? 31.Ba3 Qa5+/–) 31.Nd7 (31.Qc3 f6 32.Nd7 Kd7 33.Bd6 Qd6+–) 31...Rd7 32.Qf5 (32.Qb2 Rd5 33.cd5 Kd7+–) 32...Qa7 (32...Na6 33.Ba3 Qb6 34.Bf7 Kd8 35.Qg5 Kc8 36.Qg8 Kc7 37.Qg3 Kc8 38.h3+–) 33.Qe4 (better is 33.Bf7!? Kd8 34.Ba5 Kc8 35.Kf2+–) 33...Kd8 34.Bc3 Qa4? (better is 34...Qb6+–) 35.Bf6 Kc8 (35...Kc7 36.Qe5 Rd6+–) 36.Qe8 Kc7 37.Be5 1–0. Kreuzer,Uwe – Reinle, Ladenburg, 1987.

5.c4 d6 6.b5 cb5 7.Bf6 ef6 8.cb5=.

5.c4 d6 6.b5 e5=.

5.c4 d6 6.b5 Bf5 7.Nf3 (7.Bf6 ef6 8.Nc3 cb5 9.Nb5 Be7+=) 7...Nbd7 (7...e5 8.Nc3=) 8.a4 (8.Nc3 e5=) 8...g6 (8...e5 9.d4=) 9.Be2 (9.Nd4 Bb1 10.Rb1 c5+=) 9...Bg7 (9...cb5 10.ab5 Bg7 11.Nc3+=) 10.d4 (10.0-0 e5=) 10...0-0= 11.Nbd2 cb5 (11...Rac8 12.0-0=) 12.cb5 (12.ab5 Rfc8+=) 12...Rac8 13.Nc4 (13.Rc1 d5=) 13...Qa7 (13...Qd8 14.Rc1=) 14.0-0 Rc7 15.Rc1 Rfc8 16.Ncd2 (better 16.Qb3!? b6 17.Ncd2=) 16...Bc2–/+ 17.Qe1 Ba4 (17...Nb6 18.Ba1–/+) 18.Ra1 (18.Rc7 Rc7 19.Qa1 Nb6=+) 18...Bc2–/+ 19.Nc4 (19.Nb1 a4–/+) 19...b6 (better 19...Rc4 20.Bc4 Rc4 21.Ra5 Qb6–+) 20.Qd2? (better 20.Na3!?–/+) 20...Rc4–+ 21.Bc4 Rc4 22.Rfc1 Qc7 23.Ne1 (23.Qe2 Qc8–+) 23...Bb3 (23...Bf5 24.f3 Bh6 25.Qe2 Rc1 26.Rc1–+) 24.Qd3 a4 25.Rc4 Bc4 (25...Qc4!? 26.Qc4 Bc4 27.Ra4 Bb5 28.Ra8 Bf8 29.Nc2–+) 26.Qc2 d5 27.Ra4 (27.Qa4 Qd8–+) 27...Qb7 28.Rb4 e6 29.Nf3 (29.Ba3 Qa8 30.Ra4 Qd8–+) 29...Bf8 30.Rc4 0–1. Hess,Helmut (1615) – Hoppe,Rainer (1805), 7th Berlin–ch Seniors, 2011.

5.c4 d6 6.d4 g6 7.c5 Qc7 8.Nc3 Bg7 9.b5 dc5 10.dc5 0-0 11.b6 Qd7 12.Qb3 (12.Nf3!?=) 12...Qf5 13.Nf3 Qc5 14.Na4 Qh5 15.Bc4 Nbd7 16.h3 Ne4 (16...e5 17.Rh2 Qf5 18.Nh4=) 17.Bg7= Kg7 18.g4 Qh6 19.Qd3 Nd6 20.g5 Qh5 21.Qd4 e5 (21...f6!? 22.Be2 Rd8=) 22.Ne5+= (worse is 22.Qd6 Qf3 23.Rh2 Re8+=) 22...Nf5 23.Qc3 Ne5 24.Qe5 Kg8 25.Nc5 Qg5 26.Ne4 Qe7 27.Nf6 Kg7 28.Ne8 Kh6 29.Qe7 Ne7 30.Nc7 Rb8 31.e4 Kg5 32.Ke2 (32.0-0-0 Kf4=) 32...Kf4+= 33.f3 Ng8 34.h4 Nf6 35.Rad1 (35.Rab1 Nh5 36.Kf2 f5+=) 35...h5 (35...Nd7 36.Rb1–/+) 36.Rd6 (36.Rb1!?+=) 36...Nd7–/+ 37.Rf6?? (better is 37.Bb3–/+) 37...Nf6–+ 0–1. Taus,Martin (2125) – Gazik,Igor (2310), Orlova Open Orlova CZE, 2011.

5.Bd4 Qc7 6.b5 e5 7.Bb2 (7.b6 Qd6 8.Bc3 Qe7=) 7...d5+= 8.c4 (8.d4 e4+=) 8...Be6 (8...Bg4 9.Be2 Be2 10.Qe2+=) 9.bc6 (9.cd5 cd5 10.Nf3 Bd6+=) 9...Nc6+= 10.cd5 Nd5 11.Nf3 Be7 (11...Rc8 12.d4 e4 13.Ng5+=) 12.Bb5 (12.Qc2 Bf6=) 12...f6 13.Nc3 Nc3 14.Bc3 0-0 15.Qb1 (15.Qa4 Rfd8=) 15...a4 (15...Rfd8 16.0-0+=) 16.h4 (16.0-0 Bd6=) 16...Qb6 (16...Rfd8 17.h5+=) 17.0-0 Kh8 (17...Bc5 18.Bd3 Qb1 19.Rfb1=) 18.Bc6 (18.Bd3 Qb1 19.Rfb1 Ra7=) 18...Qb1 (18...Qc6!? 19.Bb4 Bb4 20.Qb4 Rfc8+=) 19.Rfb1= (worse is 19.Rab1 bc6 20.d4 Ba3 21.de5 Bb3+=) 19...bc6 20.h5 (20.Rb7!? Rfe8 21.d4=) 20...Rfb8–/+ 21.d4 ½–½. Nordahl,Helge (2275) – Tallaksen,Geir Sune (2235), ch–NOR, Kristiansund NOR, 2001.

5.Bd4 Qc7 6.Nf3 d6 =.

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6) 4.c4 Bf5 (4...g6 5.Nf3 Bg7 6.Be2 0-0 7.0-0 Bg4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5 7.0-0 Bg4)) 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 c6 5.Nf3).

4.a3 Nbd7 5.Nf3 e6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.c4 dc4 5.Bc4 Bf5 6.Nf3 e6 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

4.c4 e5 5.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6).

4.c4 e5 5.Be5 Bb4 6.Nf3 0-0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 c6).

4.c4 e6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4).

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

4.c4 Bg4 5.Qb3 e6 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

4.c4 g6 5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.Be2 d5).

4.Nf3 Bg4 5.a3 e6 6.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3).

4.Nf3 Bg4 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.Nf3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.f4 g6 5.Nf3 Bg7 6.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 c6).

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c6 4.e3).

4.a3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c6).

4.Nf3 Bb4 5.Be2 0-0 6.0-0 d5 7.c4 dc4 8.Bc4 b5 9.Bb3 a5 10.a3 Bd6 11.d4 a4 12.Bc2 Nbd7 13.Nbd2 Bb7 14.Rc1 Rc8 15.Ne4 Ne4 16.Be4 f5 17.Bb1 c5 18.dc5 Nc5 19.Qe2 Bd5 20.Qb5?? Bf3 21.gf3 Rb8 22.Qe2 Qg5 23.Kh1 Qh5 (24.f4 Qe2–+) 0–1. shoulders – PeterRs, ChessWorld.net, 2006.

4.c4 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 c6).

4.c4 Bg7 5.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6).

4.c4 Bg7 5.Nf3 0-0 6.d4 d6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d6 6.d4 c6).

4.Nf3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 c6).

4.Nf3 Bg7 5.c4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6).

4.Nf3 Bg7 5.Be2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 0-0 5.Be2 c6).

4.f4 Bg7 5.Nf3 0-0 6.Be2 d5 7.0-0 Bg4 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0-0 5.Nf3 d5 6.Be2 Bg4 7.0-0 c6).

4.Bb2 d6 5.Be2+= Be7 6.Nf3 0-0 7.Nc3 cb5 8.Bb5.

4.Bb2 d6 5.Nf3 +=.

4.Bb2 Bd6 5.a4 (5.Nf3 e4 6.Ng5 (6.Nd4 Bc7 7.Be2 d5 8.f4) 6...Bb4= (6...h6 7.Nh3 Bc7 8.Nf4) 7.a3 Ba5 8.bc6) 5...0-0 (5...Bc7 6.Nf3 e4 7.Nd4 d5 8.Be2) 6.Nf3 (6.Be2 Bc7 7.Nf3 e4 8.Nd4) 6...h6 (better is 6...e4!? 7.Nd4 Bb4= 8.Be2) 7.Be5 (7.Ne5 Be5 8.Be5) 7...Be5 8.Ne5 Qe7 (8...Re8 9.Nf3+=) 9.d4 d6 10.Nf3 Bg4 11.Be2 Nd5 (11...a6 12.bc6 Nc6 13.0-0+/–) 12.Nfd2 (12.c4 Nf6+/–) 12...Bd7 (12...Be2 13.Qe2 Nb4 14.Na3+/–) 13.c4 Nf6 14.Nf1 (14.0-0 Bf5+/–) 14...a6 15.Qb3 (15.bc6 bc6 16.Ng3 Ra7+/–) 15...Qe4 (15...ab5!? 16.cb5 cb5 17.Bb5 Bb5 18.Qb5 Nc6=) 16.Bf3+/– Qe7 17.b6 c5 18.Bb7 (18.dc5 dc5 19.Nfd2+/– (19.Bb7?! Ba4 20.Ra4 Qb7=)) 18...Bc6?? (better is 18...Ba4 19.Ra4 Qb7=) 19.Ba8+– Ba8 20.f3 (20.d5 Ne4+–) 20...Nc6 (20...cd4 21.Nbd2+–) 21.Ng3 (21.d5 Nb4+–) 21...Na5 (21...Nd4 22.Qc3+–) 22.Qd3 (22.Qc3!? Re8 23.Ra3 Nb7+–) 22...Rb8 (22...cd4 23.Nf5 (23.Qd4?! Nb3 24.Qc3 Na1+=) 23...Qe5 24.Nd4+–) 23.Nf5 (23.Qc3 cd4 24.Qa5 Qe3 25.Kf1 Qd3 26.Ne2 Bf3+–) 23...Qf8 (23...Qe6 24.Nd2 Rb6 25.d5+–) 24.g4 (better is 24.Qc3 Nc6 25.dc5 dc5 26.a5+–) 24...Rb6 25.d5 (25.Nd2 g6 26.Ng3 Nc6+–) 25...Rb3 (25...Nd7 26.Nd2 Ne5 27.Qe4+–) 26.Qc2 Rb4 27.Nd2 Rb8 (27...g6 28.Ng3+–) 28.h4 (28.Qc3 Rb4+–) 28...Rb7 (28...Nd7 29.g5 h5 30.0-0+–) 29.g5 hg5 (29...Ne8+–) 30.hg5 Nh7 (30...Qd8 31.Ne4 Ng4 32.fg4 Qb8 33.Ne7 Kf8+–) 31.Ng3 (31.Ne7! Qe7 32.Qh7 Kf8 33.Qh8) 31...Ng5 (31...g6 32.Nde4 f5 33.gf6+–) 32.f4 g6 (32...Qe7 33.Ra3 g6 34.Qc3 Nf3 35.Kd1+–) 33.fg5 Qe7 (33...Qg7 34.Rb1 Kf8 35.Nge4+–) 34.Qc3 (better is 34.Nde4 f5 35.Nf6 Kf8 36.Rh8 Kf7+–) 34...Qc7 (34...Qe5 35.Qe5 de5+–) 35.Qh8 1–0. Eries – gordiemac, ChessWorld.net, 2009.

4.a3 A) 4...a5 5.b5 (5.Bb2 ab4 6.ab4 Ra1 7.Qa1 Bb4 8.Na2; 5.Rb1 ab4 6.ab4 d5 7.b5 Bd6 8.Bb2) 5...d5 6.Bb2 Bd6 7.bc6 bc6 8.Nf3; B) 4...Qc7 5.e4 d5 6.ed5 cd5 7.Bb5 Nc6 8.Qe2; C) 4...b5 5.Nf3 (5.Bb2 a5 6.Na2 d6 7.a4 ba4 8.b5) 5...a5 6.ba5 d6 7.Bd3 Ra5 8.Bb2; D) 4...d5= 5.Nf3 (5.Bb2 Bd6 6.Be2 0-0 7.Nf3 a5 8.Na2; 5.Be2 Bd6 6.Bb2 0-0 7.Nf3 a5 8.Na2) 5...Bd6 6.Bb2 a5 7.ba5 Qa5 8.Be2.

4.Rb1 d5 5.Nf3 Bd6 6.a3 b5 7.a4 a5 8.ab5.

4.b5 d5 5.Bb2 (5.Nf3 e4 6.Ne5 Bd6 7.f4 0-0 8.Be2; 5.Rb1 Bd6 6.Bb2 d4 7.ed4 ed4 8.Nce2) 5...Bd6 6.Be2 c5 7.Nf3 e4 8.Ng1.

4.Nf3 d6 5.Be2 (5.Bb2 e4 6.Nd4 d5 7.a3 a5 8.ba5; 5.a3 a5 6.Bb2 b5 7.e4 Be7 8.d4; 5.Rb1 Be7 6.e4 0-0 7.d4 ed4 8.Qd4; 5.e4 d5 6.ed5 Bb4 7.Ne5 0-0 8.dc6; 5.Ba3 Be7 6.Be2 b5 7.Bb2 a5 8.a3) 5...Bf5 (5...e4 6.Nd4 c5 7.bc5 dc5 8.Nb3) 6.0-0 Be7 (6...Nbd7 7.d3+= (7.Bb2 Be7 8.Ng5) 7...d5 8.a3) 7.Bb2 (7.d3 0-0+= (7...d5 8.Ne5) 8.e4) 7...0-0 (7...Nbd7 8.Ng5) 8.a3 (8.d3 Qb6=) 8...Nbd7 9.h3 (9.Bd3 Bd3 10.cd3 d5=) 9...Re8 (9...d5 10.Bd3 e4 11.Nd4+=) 10.d4 (10.Rb1 d5=) 10...e4+= 11.Nd2 d5 12.Na4 (12.g4 Be6+=) 12...b6 (12...h6 13.Nc5 Qc7 14.Nd7 Bd7 15.c4+=) 13.c4 (13.b5 Qc7 14.c4 cb5 15.cb5=) 13...h6 (better is 13...dc4 14.Bg4 Bg4 15.hg4 a5 16.ba5 Ra5–/+) 14.cd5 Nd5 15.Nc3 (15.Qb3 N7f6=) 15...N7f6 (15...Bd6 16.Nd5 cd5 17.Qb3+=) 16.Nd5 (16.Qb3 Qd7=) 16...cd5 17.Rc1 Bd7 18.f3 (18.Qb3 a5+=) 18...Qb8 (18...a5 19.ba5 Ra5 20.fe4 Ba3 21.Ba3 Ra3 22.e5 Re3 23.Ra1=) 19.Qe1 (19.fe4 de4 20.Nc4 Bh3 21.gh3 Qg3 22.Kh1 Qh3 23.Kg1 Qg3 24.Kh1 Nd5+=) 19...Bd6 (19...a5 20.b5 Bf5=) 20.f4 (20.fe4!? de4 21.Nc4=) 20...Rc8 21.Qh4 (21.Rc8 Qc8 22.Qb1 Qf8+=) 21...Rc1 22.Rc1 Qd8 (22...a5 23.b5–/+) 23.g4 (23.Nb3 Rc8+=) 23...Be7 (23...a5 24.b5–/+) 24.Kh2?? (better is 24.Qf2+=) 24...Ng4!–+ (24...Ng4 25.Qg4 Bg4 26.Bg4 g5–+) 0–1. leighcastle – urko, ChessWorld.net, 2009.

4.Nf3 e4!? 5.Nd4 Bb4+= 6.Bb2 d5 7.Be2 0-0 8.0-0.

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

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

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

4.b5 e6 5.Bb2 Bd6 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c6).

4.d4 Bg4 5.f3 Bf5 6.c5 a5 (6...Nbd7 7.Ne2=) 7.b5 Nbd7 (7...e5 8.Nc3=) 8.Nc3 e5 9.Nge2 Be7 10.Ng3 ed4 11.ed4 Bg6 12.Bd3 Bd3 13.Qd3 0-0 14.0-0 Re8 15.Be3 g6 (15...cb5 16.Nb5 b6 17.c6+=) 16.Rab1 Rc8 17.bc6 bc6 18.Na4 Rb8 19.Qd2 Bf8 20.Bf4 Rb1 21.Rb1 Qa8 22.Qd3 Qa7 23.Bd2 Bg7 24.Ne2 Nf8 (24...Re6 25.Nc1=) 25.Rb6+= Ne6 26.Ra6 (worse 26.Rc6 Qd7 27.Re6 Qe6=+) 26...Qe7 27.Ba5 (worse 27.Rc6 Qd7 28.Re6 Qe6=+) 27...Nc5 28.Nc5 Qe2 29.Qe2 (29.Rc6 Qa2 30.Qd2 Qa1 31.Kf2 Nh5–/+) 29...Re2 30.Ra8 (30.a4 h6 31.Rc6 Nh5+=) 30...Re8= 31.Re8 Ne8 32.Nb3 Nf6 (32...f5 33.a4+=) 33.a4 Bf8 (33...Nd7 34.Bb4+=) 34.Bc7+– Ne8 35.Bg3 Bd6 (35...f5!?+–) 36.Bd6+– Nd6 37.Na5 Kf8 38.Nc6 Ke8 (38...Ne8 39.a5 Nc7 40.Nb4+–) 39.Nb4 Nf5 40.Nd5 Kd8 41.Nf6 h5 (41...Nd4 42.Nh7 Ne6 43.Nf6+–) 42.d5 Nd6 43.h4 (43.g4 Ke7 44.g5 Nc4+–) 43...Nf5 (43...Ke7 44.Ne4+–) 44.a5 1–0. Steuer – Poschmann,Hans, email 4AMM–F, 1998.

4.Nf3 Bg4 5.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.a3 =+.

4.Bb2 Bb4 5.Be5 A) 5...d6 6.Bc3 (6.Bd4 0-0 7.Nf3 c5 8.Bc3 Nc6 9.Be2 d5 10.d4 dc4+=) 6...Bc3 7.Nc3= 0-0 8.d4 Qa5 9.Qd2 Bf5 10.Nf3 Nbd7=; B) 5...0-0 6.Qf3 Be7 7.c5 b6 8.d4 bc5 9.dc5 Qa5 10.Nd2 d5–/+.

4.Bb2 e4 5.Qb3 (5.a3 d5 (5...a5 6.b5 d5= 7.cd5 cd5 8.d3 Nbd7 9.Nc3 Qb6 10.Rc1 Be7=) 6.cd5 cd5 7.d3 Nbd7 8.de4 de4 9.Bc4 Be7 10.Ne2 0-0=) 5...d5+= (5...Be7 6.Nc3 d5 7.d3 dc4 8.dc4 a5 9.Rd1 Nbd7 10.b5 0-0=; 5...Qe7 6.Bf6 Qf6 7.Nc3 Qe6 8.Nge2 a5 9.b5 Bb4 10.a3 Bc5=; 5...a5 6.ba5 Na6 7.d4 ed3 8.Bd3 Nc5 9.Qc2 d5 10.Be2 Qa5+=) 6.d3 (6.Nc3 Be6 7.a3 dc4 8.Bc4 Bc4 9.Qc4 b5 10.Qb3 a5+=) 6...dc4 7.dc4 Bd6 (7...a5 8.a3+= ab4 9.ab4 Ra1 10.Ba1 Be6+=) 8.c5= Bc7 9.Bc4 (9.Nd2 Nbd7 10.Rd1 Qe7=) 9...0-0 (9...Qe7 10.Nd2= 0-0+=) 10.Ne2 (10.Nd2 Nbd7=; 10.Nc3 Nbd7+=) 10...Nbd7 (10...b5+=) 11.Nd4 Ne5 12.Nd2 Qe7 (12...Nc4 13.Nc4 Qe7 14.0-0+=) 13.h3 (13.Be2 a5 14.b5 Rd8=) 13...b6 (13...a5 14.a3+=) 14.cb6 ab6 15.b5 c5 (worse is 15...Nc4 16.Nc6 Qd6 17.Nc4+/–) 16.Nc6 Nc6 17.bc6 Rd8 18.Rd1 Bf5 19.Ke2 (19.0-0 Rd6+=) 19...Rd6–/+ 20.g4 Bg6 21.Bb5 Rad8 22.Nc4 (22.Ke1 Kh8+=) 22...Rd3 23.Qa4 Nd5 24.Rd3 (24.a3!?–/+) 24...ed3 25.Kd2 Be4 26.Qd1 (26.Rf1–+) 26...Qh4 27.Rf1 Qh3 (27...Bg2 28.f4–+) 28.Be5 (28.a4 f6–+) 28...Bf3 (28...Be5 29.Ne5 Ne3 30.c7–+) 29.Qa1 (29.Qe1 Qg4 30.Bb2 Bh2–+) 29...f6 30.Bc7 Nc7 31.Na3 (31.a4 Qg4 32.Qc1 Be4–+) 31...Qg4 (31...Qg4 32.Bc4 Kh8–+) 0–1. Knudsen,Ragnar – Karlsen,T (2135), Troll Masters, Gausdal NOR, 2003.

4.c5 a5 5.d4 ed4 (5...ab4 6.de5 Ne4 7.Bb2 Nc5 8.Nf3 b5 9.Be2 d5 10.0-0 Be7–/+) 6.ed4 ab4 7.Qe2 Be7 8.Qb2 d6 9.Qb4 Nd5 10.Qc4 dc5 –+.

4.c5 d6 5.d4 dc5 (5...ed4 6.ed4 dc5 7.bc5 b6 8.Bc4 bc5 9.Nf3 cd4 10.0-0 Bc5+=) 6.bc5 ed4 7.ed4 b6 8.Bc4 bc5 9.Ne2 cd4 10.Qd4 Bb4 –/+.

4.a3 d5 5.Nf3 Bd6 6.Bb2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.a3= d5 5.Nf3 Be7 6.Be2 (6.d4 0-0=) 6...0-0 7.Nc3 dc4 8.Bc4 Nd5 (8...b5 9.Be2+=) 9.Bb2 Bf6 (9...a5 10.b5=) 10.d4 Nc3 (10...a5 11.ba5 Qa5 12.Qc2+=) 11.Bc3+= Nd7 12.0-0 Nb6 13.Bd3 Nd5 14.Bd2 g6 15.Qc2 Bg7 16.Rfd1 f5 17.a4 Qe7 18.Qc5 Bd7 19.Qe7 Ne7 20.Rab1 a6 21.b5 (21.a5!?+/–) 21...ab5 22.ab5 Nd5 23.bc6 Bc6 24.Bb5 h6 25.Bc6 bc6 26.Rdc1 Ra6 27.Bb4 (27.h4 Re8+=) 27...Rfa8 (27...Rb8 28.Be1 Rb1 29.Rb1=) 28.Be1 (28.Bd6!?+=) 28...g5+= 29.h3 Kh7 (29...g4 30.hg4 fg4 31.Nh2+=) 30.Kf1 Kg6 31.Rb2 (31.Rb7 Bf6=) 31...h5 (31...g4 32.hg4 fg4 33.Nh2=) 32.Rbc2 Rc8 33.Bd2 Bf6 34.Rc5 g4 35.Ne1 Ra2 (35...Be7 36.R5c4=) 36.R5c2 (36.Ke2!?+=) 36...Rc2+= 37.Rc2 Be7 (37...e5!? 38.de5 Be5+=) 38.hg4 hg4 39.Nd3 Bd6 40.Ke2 Kf6 41.f3 gf3 42.gf3 e5 43.de5 Be5 44.Ne5 Ke5 45.Bc3 Nc3 46.Rc3 ½–½. Krivoshapko,Alexander – Konin,Sergey, Omsk Russia, City Championship, 2013.

4.Qb3 d5 5.Nf3 Nbd7 6.Bb2 Be7 7.Be2 0-0 8.0-0 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 dc4 12.Bc4 b5 13.Be2 Nd5 The isolani on b4 becomes a target 14.Bc3 Bb7 15.Na3 N7f6 16.d3 (better 16.Nc2!?=) 16...Nc3-/+ 17.Qc3 Nd5 18.Qb3 Nb4 19.d4 Qd5 20.Qd5 (20.Qd1!?-/+) 20...Nd5-+ (20...cd5?! 21.Nb5 Rc8 22.Ra1=+) 21.Nb1 Ra8 (21...b4 22.Nbd2-+) 22.Ne5 (22.Rc1 Ra1-+) 22...f6 (22...Ra2 23.Bf3-+) 23.Nd7 (23.Nd3 Bd6-+) 23...Bc8 24.Nc5 Bc5 25.dc5 Ra2 26.Bd3 e5 27.Be4 (27.Rd1 Be6-+) 27...Be6 28.Rc1 b4 29.f4? (29.Bc2-+) 29...f5 (29...Ne3?! 30.fe5 Bd5 31.Bd5 Nd5 32.ef6 gf6 33.g4-+) 30.Bd5 Bd5 (30...cd5?! 31.fe5 Kf7 32.Kf1-+) 31.fe5 (31.g3 Rg2 32.Kf1 Rh2-+) 31...Rg2 32.Kf1 Rh2 (32...Rh2 33.Ke1 Be4-+) 0-1. Mely (2305) - DXX (2655), ChessWorld.net, 2016.

4.b5 d5 5.Bb2 Be7 6.Nf3 0-0 7.a4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4).

4.Bb2 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 c6).

4.Bb2 Bg7 5.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6).

4.a3 Bf5 5.Nc3 e6 6.Nf3 Nbd7 7.Be2 h6 8.0-0 Bd6 9.Bd3 0-0 10.Bb2 Qc7 11.g3 (11.Bf5 ef5 12.Qd3 Ne4=+) 11...Rfe8 12.Na4 (12.Bf5 ef5 13.Qd3 Ne4=+) 12...Bg4 13.Nc5 Bc5 14.dc5 b6 15.cb6 ab6 16.Be2 b5 17.Nh4 Be2 18.Qe2 Ne4 19.Qg4 Ndf6 20.Qe2 Ra4 (20...e5 21.Qd3–/+) 21.Rad1 (21.f3 Nd6–/+) 21...Ra7 22.Rd3 (22.Nf3 e5–/+) 22...Nd7 23.Rb3 Raa8 24.Qg4 f6 25.Rd3 c5 26.bc5 Nec5 27.Rdd1 Ne4 28.Qe2 Nb6 29.f3 (29.Qb5?? Nc4–+) 29...Nd6 30.Rd3 Nbc4 31.Rb1 Qc6 32.Bc1 Rec8 33.Rc3 e5 34.Qd1 Rc7 0–1. Usingprogram (2020) – Denisa2006 (1945), kurnik, 2011.

4.a3 Bf5 5.Ne2 e6 (5...Ne4 6.f3 Nf6 7.Ng3=) 6.Ng3= Bg6 7.Bd3 (7.c4 dc4 8.Bc4 a5=) 7...Bd6 8.0-0 Nbd7 (8...Bd3 9.cd3 a5 10.ba5 Qa5 11.Qf3=+) 9.f4 (9.c4 dc4 10.Bc4 0-0=) 9...a5=+ 10.b5 cb5 (10...Bd3 11.Qd3 cb5 12.Qb5=+) 11.Nc3 (11.Bb5 0-0=+) 11...b4 (11...Bd3 12.cd3 b4 13.Nb5–/+) 12.Nb5=+ Be7 13.ab4 (13.f5 ef5 14.Nf5 0-0=+) 13...Bd3–/+ 14.cd3 Bb4 (14...Qb6 15.Qa4 Bb4 16.Qb4 ab4 17.Ra8 Ke7 18.Rh8 Qb5 19.Rd1=) 15.Ba3=+ Ba3 16.Ra3 0-0 17.Qd2 (17.Qa4 Nb6 18.Qb3 a4–/+) 17...Nb8 (17...a4 18.Nd6–/+) 18.Rc1 (18.f5 a4=+) 18...Nc6 19.Qd1 (19.Ra4 Rc8=+) 19...Qd7 20.Qa4 Rfc8 21.Rac3 h6 (21...Nb4 22.Ne2–/+) 22.e4=+ Nb4 23.e5 Nd3 (better is 23...Rc3 24.Rc3 Ng4=+) 24.Rc8+= Rc8 25.Rf1?? (25.Rc8 Qc8 26.ef6 Qc1 27.Nf1=) 25...Ne4–+ 26.Qa5 (26.Ne4 de4 27.Qa5 Rc4–/+) 26…Rc2 (27.Ne4 de4–/+; 26...Ng3!? 27.hg3 Rc4–+) 0–1. pierre – Braco, ChessHere.com, 2006.

4.Bb2 Bf5 5.Nf3 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.d4).

4.Bd3 e5 5.de5 Ng4 (5...Bb4? 6.c3 Nbd7 7.cb4 Ne5 8.Bc2+–) 6.Nf3 Bb4 7.c3 Bc5 (7...Be7 8.h3 Nh6 9.Qc2=) 8.h3+= Nh6 9.Nbd2 (9.Qc2 f5=) 9...Bf5 (9...Qe7 10.Nb3 Bf5 11.Bf5 Nf5 12.Qd3=) 10.e4 Bg6 11.Qc2 0-0 (11...Na6!?+=) 12.Nb3+/– Nd7 13.ed5 (13.Bh6 gh6 14.ed5 cd5+/–) 13...cd5 14.0-0 Re8 (14...Qc7 15.Bh6 gh6 16.Rad1+/–) 15.Bg6 hg6 16.Rd1 Rc8 (16...Qc7!?+/–) 17.Rd5+– Bf8 (better is 17...Rc7+–) 18.Bh6 gh6 19.Rad1 Rc7 20.Qd2 Re7 21.Nc5! Rc5 (21...Nc5 22.Rd8 A pinning theme) 22.Rc5 (22.Rd7?! Rd7 23.Qd7 Qb6+/–) 22...Qe8 23.Rd5 Ne5 24.Ne5 Re5 25.Rd8 Qe7 (25...Qa4 26.Rb1 b6 27.Qh6+–) 26.Qh6 Re1 27.Re1 Qd8 28.Qe3 Qa5 29.Qd2 Qb5 30.Qd4 Bc5 31.Qd8 Kg7 32.Qc7 a5 (32...Bb6 33.Qf4 Qc5 34.Qf3+–) 33.Qe5 Kg8 34.Qe8 (34.a4 Qc6+–) 34...Qe8 35.Re8 Kg7 36.a4 b6 37.Kf1 f6 38.Rc8 (38.Rb8 Kh6+–) 38...Kf7 39.Rc7 Ke6 40.Rc6 Ke7 (40...Ke5 41.Ke2+–) 41.Ke2 (41.h4 Kf7+–) 41...g5 42.Rc5 (better is 42.g3!? Kf7+–) 42...bc5 43.Kd3 Kd6 44.Kc4 Kc6 45.g3 (45.g3 Kd6 46.h4 gh4 47.gh4+–) 1–0. Skaza,Adam (1800) – Chabaj,Jan (1800), corr, 1998.

4.Bd3 e6 5.c3 =.

4.Bd3 e6 5.Bd2 Bd6 (5...Ne4 6.Nf3=) 6.Nf3 Nbd7 7.0-0 Qe7 8.b5 e5 9.bc6 bc6 10.c4? (better 10.Nh4 g6 11.f4=+) 10...e4–+ 11.c5 Bc7 (11...ed3?! 12.cd6 Qd6 13.Nc3=+; worse 11...ef3 12.cd6 Qd6 13.Qf3+=) 12.Be4 (12.Qa4 Nb8 13.Be2–+) 12...de4 (12...Ne4?! 13.Na3–+; 12...Qe4?! 13.Qa4 Bb7 14.Nc3–+) 13.Nh4 (13.Qa4 Bb7 14.Ne1 Ng4–+) 13...0-0 (better 13...Nc5 14.Qc2 Qd6 15.g3–+) 14.Bb4 (14.f4–+) 14...Nd5 15.Nf5 Qe6 (15...Qg5 16.Nd6 Bd6 17.cd6 Nb4 18.a3–+) 16.Qg4 g6 17.Bd2 (17.Nh6 Kg7 18.Bd2 Kh6 19.Qh4 Kg7–+) 17...Ba6 18.Re1 (18.Nh6 Kg7 19.Qe6 fe6–+) 18...Qf5 19.Qf5 gf5 20.Kh1 (20.Nc3 Nc3 21.Bc3 Bd3–+) 20...N7f6 (20...Rfb8 21.Nc3–+) 21.a4 (21.Kg1 Bd3–+) 21...Rab8 22.f3 (22.Kg1 Bd3 23.Nc3 Rb3 24.Nd5 Nd5–+) 22...f4 23.ef4 (23.Nc3 Nc3 24.Bc3 Nd5–+) 23...Rfe8 24.fe4 Ne4 25.g3 (25.Kg1 Bd3 26.f5 Rb2–+) 25...Bd3 26.Be3 (26.Kg1 Bb1 27.Rab1 Rb1 28.Rb1 Nd2–+) 26...Ne3 27.Re3 Nf2 (27...Nf2 28.Kg2 Re3 29.Kf2 Re2 30.Kf3 Rbe8–+) 0–1. pvhameren – pierred, net–chess.com, 2017.

4.Bd3 Bg4 5.f3 Bd7 =.

4.Bd3 Bg4 5.f3 Bh5 =.

4.Nf3 Bf5 =.

4.Nf3 Bg4 5.a3 e6 6.c4 Nbd7 (6...Bd6 7.c5 Bc7 8.Be2=) 7.Nbd2 Be7 (7...a5 8.b5=) 8.h3 (8.Be2 a5 9.ba5 Qa5=) 8...Bh5 (8...Bf5 9.Be2=) 9.Be2 0-0 (9...a5 10.ba5 Qa5 11.0-0=) 10.Rb1 (10.0-0 a5 11.ba5 Qa5=) 10...Bg6 11.Rb3 (11.Rb2 Ne4+=) 11...Ne4 (11...dc4 12.Nc4 Be4 13.0-0=) 12.0-0 h6 (12...dc4 13.Nc4 Nd6 14.Nce5=) 13.Bb2 (13.Ne4 Be4 14.Nd2 Bf5=) 13...Ndf6 (13...Nd2 14.Qd2 dc4 15.Bc4=) 14.b5 (14.Ne5 Bf5=) 14...dc4 (14...Nd2 15.Nd2 cb5 16.Rb5=) 15.Nc4 Qc7 (15...c5 16.Nfe5=) 16.bc6+= bc6 17.Nfe5 Bh7 18.Bd3 (18.Qe1 c5+=) 18...c5 (18...Rfb8 19.Rb8 Rb8 20.Qc2+=) 19.Qf3 (19.Qc2 Rab8+=) 19...cd4 (19...Rfb8 20.Rb8 Rb8 21.Rd1+=) 20.Bd4 Ng5 (20...Rfb8!? 21.Rb8 Rb8+=) 21.Bh7+/– Kh7 22.Qb7 Qb7 23.Rb7 Nd5 (23...Ng8 24.Ba7 Rac8 25.Nb6+/–) 24.Nc6 (24.Ra7?! Ra7 25.Ba7 Rc8=) 24...Bf6 (24...Rfe8 25.Na7 f6 26.a4+–) 25.Bf6 Nf6 26.Na7 (26.f3 Rac8 27.N6a5 e5+–) 26...Nge4 27.Ra1 (27.Nc6 Nd5+/–) 27...Nd5 28.a4 Nc5 29.Rb5 Ra7 (29...Ne4!? 30.Ra5 Rfb8+/–) 30.Rc5+– Rfa8 (30...Rd8 31.a5+–) 31.a5 Nb4 32.Nb6 (32.Kf1 Kg6+–) 32...Rb8 (32...Rd8 33.Rc4 Nd3 34.Kf1+–) 33.Rd1 Na6 34.Rc6 Nb4 35.Rc4 Nd5 (35...Na2 36.Rc5+–) 36.Nd5 ed5 37.Rd5 Rb1 (37...Rb2 38.g4+–) 38.Kh2 Rb2 (38...Ra6 39.Kg3+–) 39.Kg3 Ra2 40.Rcc5 Rb7 41.h4 Rbb2 (41...g6 42.Rb5 Rc7 43.h5+–) 42.Rf5 Kg6 (42...Rb7+–) 43.h5 (43.h5 Kh7 44.Rf7+–) 1–0. aspasio – Blunderov, ICC, 1999.

4.Nf3 Bg4 5.Be2 e6 6.Bd2 (6.a3 a5+=) 6...Ne4 7.Ne5 (7.h3 Bf5+=) 7...Be2 8.Qe2 Bd6 9.0-0 Nd7 (9...Be5 10.de5 Nd7 11.f4+=) 10.Nd7+= Kd7 (10...Qd7 11.f3 Nd2 12.Qd2+=) 11.a3 Qh4 12.g3 Qh3 13.Nc3 Nf6 (13...Nc3 14.Bc3 h5 15.e4–/+) 14.e4= de4 15.Ne4 Ne4 16.Qe4 h5 17.Rae1 (17.Bf4 f5 18.Qe3 Bf4 19.Qf4 h4=) 17...h4+= 18.Re2 Rae8 19.Rfe1 (19.Bf4 Bf4 20.Qf4 hg3 21.fg3 f6=) 19...Kc8 (19...hg3 20.fg3 Kc8 21.Bf4+=) 20.Bf4 Bf4 21.Qf4 hg3 22.fg3 Qh6 (22...Qh5 23.Qe5+=) 23.Qe4 (23.Qh6 Rh6 24.h4 Rd8=) 23...Qh5 (23...Rd8 24.c4+=) 24.Qf4 (24.Rf2 f6=) 24...Rh6 (24...g5 25.Qf2=) 25.Qe4 (25.Qe5 Qg4+=) 25...Rd8 26.c3 Qd5 (26...Rdh8 27.Qe3+=) 27.Qd5= Rd5 (27...cd5 28.h4=) 28.a4 (28.Rf2 Rd7+=) 28...a5= 29.Rb1 g5 (29...ab4 30.Rb4 c5 31.Rc4=) 30.ba5 Ra5 31.Rb4 g4 32.Reb2 Ra7 33.Kg2 (33.Re2 Kc7=) 33...f5 34.c4 e5 35.de5 Re6 36.Re2 1–0. fifteenminutesofgame (2400) – blackpanther (2410), net–chess.com, 2004.

5.f3 Bf5 =.

5.Nf3 e6 =.

6.Qe2 e6 +=.

6.Ne2 e6 7.0-0 +=.

7.0-0 a5 =.

7.0-0 Bg7 =.

7.Nd2 a5 8.ba5 Qa5 9.0-0 =.

7.Nd2 a5 8.ba5 Qa5 9.Rb1 =.

7.Nd2 Bg7 8.0-0 0-0 9.Bb2 (9.c4 Nbd7=) 9...b5 (9...a5 10.ba5 Qa5 11.c4=) 10.a4 (better is 10.Nf4=) 10...e5 (better is 10...a5=) 11.de5+/– Ng4 12.ab5 cb5 13.Nd4 (13.Nf3 Re8+/–) 13...Ne5 14.Nb5 Nbc6 (14...Qb6 15.Nd4+/–) 15.Nd4 Nb4 (15...Rb8 16.Nc6 Nc6 17.Bg7 Kg7 18.c3+/–) 16.Ba3+– Nbc6 (16...a5 17.c3 Nbd3 18.Bf8 Qf8 19.Qc2+–) 17.Bf8 Qf8 18.Ra6 Rc8 19.c3 Qc5 20.Qa1 h5 (20...h6 21.Rd1+–) 21.N2b3 Qe7 22.Qa4 Nd4 (22...Qc7 23.Nb5 Qb8 24.N3d4+–) 23.cd4 (23.Nd4?! Qc5+–; worse is 23.Qd4 Nf3 24.gf3 Bd4 25.Nd4 Rc3–+; 23.ed4?! Nd3 24.Ra7 Qe4+–) 23...Nc4 24.Ra7 (24.Ra7 Qf6 25.Ra1+–) 1–0. Rayetzky – Coccomo, email 4AMM–07, 1997.

7.Nd2 Bg7 8.0-0 0-0 9.Bb2 (9.c4 dc4 10.Nc4 Qd5=) 9...b5 10.a4 e5 (better is 10...a5=) 11.de5+/– Ng4 12.ab5 cb5 13.Nf3 Re8 14.Nf4 Ne5 15.Ne5 Be5 16.Be5 Re5 17.Qd3 g5 18.Ne2 (18.Nh5 a6+/–) 18...a6 19.Nd4 g4 (19...Qc8 20.Ra3+/–) 20.Nb5! Nc6 (20...ab5 21.Ra8 Pinning (21.Ra8 Deflection)) 21.Nd4 Nd4 22.ed4 Rh5 (22...Re4+–) 23.Rfe1 (23.Qg3!? Qh4+–) 23...Qd6 (23...Qh4 24.Qg3 (24.Ra6 Qh2 25.Kf1 Qh1 26.Ke2 Re8 27.Qe3 Re3 28.Ke3 Qe1 29.Kd3 Rf5 30.Ra8 Kg7–+) 24...Qg3 25.fg3+/–) 24.Qg3 Qg3 25.fg3 Rc8 26.Ra6 Rc2 27.Rf1 Rb2 28.Rb6 h6 (28...Kg7 29.Rb7+/–) 29.Rb8 (29.b5 Kg7+–) 29...Kg7 30.Rb7 (30.b5 Rb4+/–) 30...Kg6 31.Rbf7 Rb4 32.R1f6 Kg5 33.Rf5 Kg6 34.R5f6 (34.R7f6!? Kg7 35.Rh5 Kf6 36.Rd5 (36.Rh6?! Kf5+=) 36...Rb1 37.Kf2 Rb2 38.Ke3 Rg2 39.Kf4+/–) 34...Kg5+= 35.Rd6 (35.Rf2 Rb1 36.Rf1 Rf1 37.Rf1 Kg6+=) 35...Rd4+/– 36.Rf1 Re4 (36...Rb4 37.Re1 Re4 38.Rd5 Kf6 39.Re4 Rd5 40.Rg4+–) 37.Rd5+– Kg6 38.Rh5 Kh5 39.Rf5 Kg6 40.Rf4 Re6 (40...Re1 41.Kf2 Ra1 42.Rg4 Kf5 43.Rf4 Kg5 44.Rb4+–) 41.Rg4 (41.Rg4 Kf5 42.Rf4 Kg5 43.Kf2+–) 1–0. Leyen – Rayetzky, email 4AMM–07, 1997.

4.a3 Nbd7 5.Bb2 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

4.a3 Bf5 5.Bb2 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

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

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

4.c4 e6 5.Qb3 dc4 6.Bc4 b5 7.Be2 a5 (7...Nd5=) 8.a4 (8.ba5!? Bd6 9.0-0=) 8...ab4–/+ 9.Bb2 ba4 10.Ra4 Ra4 11.Qa4 Bd7 12.Ne5 The backward pawn on c6 becomes a target 12...Be7 (12...c5 13.Nd7 Nbd7 14.d4–/+) 13.0-0 0-0 14.d4 c5 15.Nd7 Nbd7 16.dc5 Bc5 17.Rd1 Qa8 18.Qb3 Qa7 19.Nd2 Rb8 20.Nc4 (20.Ra1 Qb7=+) 20...Nd5 (20...Qc7 21.Rc1–/+) 21.Bf3 N5b6 22.Nb6 Nb6 (worse 22...Bb6 23.Qb4 Bc5 24.Qc3+=) 23.Be5 Rc8 24.Ra1 (24.Be4 Qe7=+) 24...Qd7 (24...Qe7 25.Be4–/+) 25.g3 (25.Rd1 Qa4 26.Qd3 Qa3=+) 25...Qb5 26.Bb7 (26.Be4 Qc4 27.Qb1 f5=+) 26...Rf8 (26...Rd8 27.Bc7 Qd3 28.Qb1 Qb1 29.Rb1–/+) 27.Ba6 Qd7 (27...Qc6 28.Bf1–/+) 28.Bd3 (28.Rc1 Qe7–/+) 28...Qd5 29.Qd5 Nd5 30.Ra5 (30.Rc1 Be7–/+) 30...Be7 (30...Rc8 31.Rb5–/+) 31.Rb5 (31.e4 Nb6–/+) 31...Rc8 (31...Rd8 32.Bd4–/+) 32.Kf1 Nc3 (32...f6 33.Bd4–/+) 33.Ke1 0–1. Winterfeldt,Steffen (1760) – Horneber,Thomas (1910), Mittelfrankenliga–B2b, 2006.

4.c4 Bg4 5.a3 (5.Nc3 e6 6.Qb3 Be7=) 5...a5 6.Bb2 e6 7.b5 Bd6 8.h3 Bf3 9.Qf3 0-0 10.Bf6 Qf6 11.Qf6 gf6 12.d4 dc4 13.Bc4 Nd7 14.Nd2 Nb6 15.bc6 bc6 16.Bd3 Rfd8 17.Ke2 c5 18.dc5 Bc5 19.Rhc1 Bf8 20.Rc6 Nd5 21.Be4 Rab8 22.Bd5 Rd5 23.Nc4 Kg7 24.Ra2 Rb3 25.Ra6 Rc3 26.Na5 Ba3 27.Nc6 Bf8 28.Nd4 f5 29.Ra7 Kg6 30.Nf3 h6 31.Rb7 Rc4 32.g3 Rb4 33.Rc7 Bc5 34.Ne1 Bb6 35.Rc8 Rb3 36.Rb8 Rdb5 37.Nd3 Bc7 38.Rb5 Rb5 39.Ra7 Bb8 40.Ra6 Rb7 41.Kd2 Bc7 42.Kd1 Kf6 43.Ke2 Bb8 44.f4 h5 45.Kf3 Rb1 46.Rc6 Rf1 47.Ke2 ½–½. Millstone,Michael (2445) – Dearnley,Andrew (2340), corr ICCF NFL Championship I, 2008.

4.c4 g6 5.Nc3 Bg7 6.Rb1 0-0 7.Bb2 Bg4 8.d3 (8.Qb3 dc4 9.Bc4 b5+=) 8...Na6 9.a3 Nc7 10.Be2 dc4 11.dc4 Qd1 12.Rd1 Ne4 13.Nd4 Be2 14.Nde2 Rad8 15.f3 (15.Ne4 Bb2 16.a4 Ne6+=) 15...Nf6 (better is 15...Nd6!?–/+) 16.Kf2= e5 17.Rd8 Rd8 18.Rd1 Rd1 19.Nd1 Nd7 20.Nc1 Ne6 ½–½. blackdogs (2450) – algernon (2515), net–chess.com, 2014.

4.d4 Qb6 5.Ba3 (5.a3 a5 6.ba5 Qa5 7.Bd2 Qc7=) 5...Bg4+= 6.c4 dc4 7.Bc4 e6 8.Qa4 Bf3 9.gf3 Be7 10.Nd2 0-0 11.Bd3 Nd5 12.0-0 Qd8 (worse is 12...Nb4 13.Rab1 c5 14.dc5+/–; worse is 12...Bb4 13.Rfb1 c5 14.dc5+=) 13.f4 Nd7 (13...b5 14.Qb3+=) 14.Rac1 a6 15.Rfe1 (15.Rfd1 a5 16.b5 cb5 17.Be7 ba4 18.Bd8 Rad8=) 15...f5 16.Qb3 Rf6 17.Kh1 (17.Nc4 Rh6+=) 17...Rh6 18.Rg1 N7f6 (18...Qf8 19.Rg2+=) 19.Rg2 Ng4 (19...Qf8 20.Rcg1+=) 20.Be2= Nf4 (20...Qf8!?=) 21.ef4+/– Qd4 22.Nf3 Nf2 (22...Qf4? 23.Re1+–) 23.Kg1 Nh3 24.Kf1 Qf4 25.Rc4 Qc7 26.Bc1 f4 27.Re4 Qd6? (better is 27...Bf6 28.Qe6 Qf7 29.Qf7 Kf7+–) 28.Bc4 Rd8 (28...Kf8 29.Re6 Re6 30.Be6 Qb4 31.Qb4 Bb4 32.Bh3+–) 29.Re6 Re6 30.Be6 Kh8 31.Bb2 (31.Bb2 Bf6 32.Bf6 (worse is 32.Bh3 Bb2 33.Rb2 Rf8+–) 32...gf6 33.Bh3 Qd3 34.Qd3 Rd3 35.Kf2+–; 31.Bh3?! Qd1 32.Qd1 Rd1 33.Ne1 Bb4+–) 1–0. pierre – Reb, chess.com, 2007.

4.d4 Bg4 5.a3 e6 6.c4 Be7 7.c5 a5 8.b5 b6 9.cb6 Qb6 10.Qa4 (10.Nc3 cb5 11.Bb5 Nbd7=) 10...0-0=+ 11.Ne5 Bf5 12.Nc3 c5 13.Be2 Nbd7 (13...Rc8 14.g4 Be4 15.f3 cd4 16.Qd4 Qd4 17.ed4 Rc3 18.g5=+) 14.Nc6 (14.g4!? Ne5 15.de5=) 14...Bd6=+ 15.0-0 cd4 16.ed4 Qc7 17.g3 Nb8 18.Bd2 Nc6 19.bc6 Rfc8 20.Bb5 h5 21.Bg5 Nh7 22.Bd2 h4 23.Kh1 (23.Rfc1 Nf8=) 23...Nf6=+ 24.Rac1 Bh3 (24...Rcb8 25.Bg5 Ne4 26.Bh4 Ba3 27.Qa3 Nc3 28.Rc3 Rb5 29.Qe7=) 25.Rfe1= hg3 26.hg3 Bg3 27.fg3 Qg3 28.Re2 Qf3 29.Kg1 g5 30.Qc2 Qg3 31.Kh1 Bg4 32.Rg1 (better 32.Re3 Bf3 33.Rf3 Qf3 34.Kg1 Qg3 35.Kf1=+) 32...Qh3-+ 33.Rh2 Bf3 34.Rgg2 Bg2 35.Kg1 Be4 36.Rh3 Bc2 37.Bg5 Ne8 38.Bf4 f6 39.Rh2 Bf5 40.Rb2 Ra7 41.Kf2 Rh7 42.Bg3 Rh1 43.Na4 Rc1 44.Ke2 Kf7 45.Nb6 R8c6 46.Bc6 Rc6 47.Be1 Nd6 (47...a4 48.Na4 Ra6 49.Rb4-+) 48.Ba5 Be4 49.Be1 e5 50.de5 fe5 51.a4 Rc1 52.a5 Ra1 53.Bd2 d4 54.Nd7 (54.Bb4 Nb7 55.Nc4 Ke6-+) 54...Ke6 (54...Nc4 55.Rb4 d3 56.Kf2 Nd2 57.Ne5 Ke7 58.Ke3-+) 55.Nc5 Kd5 56.Nd7 Bf5 57.Nb6 Kc6 0-1. marekt (2180) - dsb13 (2325), gameknot.com, 2018.

4.Be2 Bf5 5.0-0 (5.a3 a5=) 5...e6 6.a3 Bd6 7.Bb2 Nbd7 (7...Qc7 8.c4=) 8.d4 (8.Nh4 Bg6=) 8...h6 (8...a5 9.b5=+) 9.Nbd2 0-0 (9...a5 10.b5=) 10.c4 a5 (10...dc4 11.Nc4 Bc7 12.Bd3=) 11.b5 (11.c5 Bc7=) 11...c5 (11...cb5 12.c5 (< 12.cb5 Qe7=+) 12...Bc7 13.Qb3+=) 12.cd5+= ed5 (12...Nd5? 13.e4 cd4 14.Bd4+– (14.ed5?! d3=)) 13.dc5 Nc5 14.Nd4 Bd7 (14...Bg6 15.N2f3+=) 15.a4 (15.N2f3 Rc8+=) 15...Re8 16.N2f3 (16.N2b3 Nb3 17.Nb3 Be6+=) 16...Qe7 (16...Rc8 17.Rc1=) 17.Bd3 (17.b6 Rec8=) 17...Nce4 (17...Nd3 18.Qd3 Rac8 19.Ba3=) 18.Qb3 (18.Rc1 Rac8=) 18...Rad8 (18...Rac8 19.Ba3=) 19.Rad1 (19.Rac1 Nc5 20.Qd1 Nd3 21.Qd3 Ne4=) 19...Bg4 (19...Rc8 20.Rc1=) 20.Be2 (20.h3 Nc5 21.Qc2 Nd3 22.Qd3 Be6+=) 20...Nc5 21.Qa2 Nfe4 (21...Rc8 22.Rc1=) 22.Nb3 (22.b6 Be6=) 22...b6 (22...Ng5 23.Nc5 (23.Rd5? Nf3 24.gf3 Be6 25.Rc5 Bc5–+) 23...Bc5 A) < 24.Rd5 Be6 25.Rfd1 Be3 26.Rd8 Ba2 (< 26...Rd8 27.Rd8 Qd8 28.Qa1+/–) 27.Re8 Qe8 28.fe3 Bb3–+; B) 24.Nd4 Be2 25.Ne2=) 23.Nbd4 (23.Rd5? Be6 24.Nc5 Bd5–+ (24...Nc5?! 25.Rfd1=+; 24...Bc5?! 25.Bc4=; 24...bc5?! 25.Bc4=)) 23...Qc7 24.h3 (24.Qd5?? Bh2 25.Nh2 Rd5 26.Ng4 Na4–+) 24...Be6 25.Qa1 Rc8 26.Nc6 Nb3 27.Qb1 Nbc5 28.Qa1 Nb3 29.Qb1 Nbc5 30.Qa1 ½–½. Guliev,Sarhan (2515) – Moradiabadi,Elshan (2300), Open Fajr IRI, 2001.

4.Be2 Bg4 5.Bb2 =.

4.a3 a5 5.b5 Ne4 6.Bb2 cb5 7.Bb5 Qb6 8.a4 Na6 9.0-0 Nc7 10.Bd4 Bc5 11.Na3 Nb5 12.Nb5 Bd4 13.Nfd4 0-0 14.c4 d6 15.Qc2 Nf6 16.Nf3 h6 17.Qd3 Ra6 18.Rab1 e5 19.Qc2 Qc6 20.d4 Re8 21.Nd6 Qd6 22.de5 Re5 (better is 22...Qc7!? 23.ef6 Rf6+/–) 23.Rbd1+– (23.Ne5 Qe5 24.Rfd1 Rd6 25.Rd6 Qd6=+) 23...Rc5 24.Rd6 Rd6 25.Nd4 Ng4 26.Nb3 Rh5 27.Rd1 Bf5 28.Qe2 Ra6 (28...Rg6 29.e4 (29.Na5?! Be4 30.Rd4 Ne3+–) 29...Re6 30.f3+–) 29.Rd8 Kh7 30.e4 Re6 31.f3 Nh2 (31...Nf6 32.Qf2 Be4 33.fe4 Re4 34.Rb8+–) 32.Nd4 Bg6 (32...Re7 33.Nf5 Rf5 34.Kh2 Rh5 35.Kg3 Rg5 36.Kf4 Rc5+–) 33.Ne6 fe6 34.Qd1 (34…Rh4 35.Rf8+–) 1–0. first – michelle, Live Game Caissa's Web, 2004.

4.a3 d5 5.d4 Bd6 6.c4 =.

4.a3 d5 5.d4 Be7 6.c4 0-0 7.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4).

4.a3 d5 5.d4 Be7 6.Bd3 0-0 =.

4.a3 Be7 5.Be2 h6 6.0-0 Qc7 7.c4 b6 8.Bb2 c5 9.Nc3 Bb7 10.Nb5 Qc6 11.d4 d5 (better is 11...0-0!? 12.dc5 bc5+=) 12.cd5+– Nd5 13.Ne5 Qc8 14.dc5 Bc6? (14...bc5 15.Nc4 0-0 16.Nbd6+/–) 15.Nd6 (15.cb6 ab6 16.Rc1 Qb7 17.Nc6 Nc6+–) 15...Bd6 16.cd6 Nd7 (16...0-0 17.b5 Bb7 18.Qd4+–) 17.Qd4 (17.Nc6 Qc6 18.Rc1 Qb7+–) 17...Ne5 18.Qe5 Nf6 (18...Rg8+–) 19.Rfc1 a6 20.Bf3 Bf3 21.Rc8 (21.gf3?! Qd8+–) 21...Rc8 22.Qg3 Bd5 23.Qg7 Rg8 (23...Ne4 24.Qh8 Kd7 25.Qh6 Nd6 26.Qg7+–) 24.Qf6 (24.Bf6?! Rg7 25.Bg7 Rc6+–) 24...Rg2 (24...Kd7 25.Qe7 Kc6 26.Rc1 Kb5 27.Rc8 Rc8 28.d7+–) 25.Kf1 Kd7 26.Qf7 Kd6 27.Be5! Kc6 28.Rc1 Kb5 29.Qd7 Rc6 30.Rc6 Bc6 31.Qd3 Ka4 32.Qc2 Kb5 33.a4 Kb4 34.Bd6 Ka5 35.Qc3 Ka4 36.Qb4# 1–0. pierre (2185) – Rudolf, internet, 2007.

4.Bb2 Bg7 5.c4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6).

4.Nc3 e6 A) 5.Rb1 A1) 5...Na6 6.Ba3 (6.a3 Be7 7.Bb2 0-0 8.Bd3 Nc7 9.0-0 a5 10.b5) 6...Bd6 7.e4 Qc7 8.d4 Be7 9.Bd3 0-0 10.0-0; A2) 5...Be7 6.Bd3 Na6 7.Ba3 0-0 8.0-0 Nc7 9.Rb3 Ncd5 10.Nd5; A3) 5...d5 6.h4 (6.Bd3 Bd6 7.0-0 0-0 8.Bb2 Bb4 9.e4 Nbd7 10.ed5; 6.h3 Bd6 7.Be2 0-0 8.0-0 Qe7 9.a3 Nbd7 10.Bb2; 6.Ba3 Bd6 7.Bd3 0-0 8.e4 de4 9.Ne4 Ne4 10.Be4; 6.Be2 Bd6 7.0-0 0-0 8.g3 e5 9.Re1 e4 10.Nd4) 6...Bd6 7.Bb2 0-0 8.h5 Nh5 9.g4 Ng7 10.g5; B) 5.a3 B1) 5...c5 6.Bb2 (6.b5 d5 7.h4 Nbd7 8.Bb2 Bd6 9.h5 gh5 10.Ne2; 6.bc5 Bc5 7.d4 Bb6 8.Na4 Bc7 9.Bd3 Nc6 10.e4; 6.Rb1 cb4 7.ab4 Nc6 8.b5 Nb4 9.Be2 Bc5 10.Bb2; 6.e4 cb4 7.ab4 Bb4 8.e5 Nh5 9.Ba3 Nc6 10.Bb5) 6...cb4 7.ab4 Bb4 8.Nb5 Be7 9.Na7 Nc6 10.Nc6; B2) 5...a5 6.b5 (6.Bb2 d5 7.Bd3 Nbd7 8.0-0 ab4 9.ab4 Ra1 10.Qa1) 6...d5 7.Bb2 Bd6 8.Be2 0-0 9.0-0 Nbd7 10.d4; B3) 5...Be7 6.Bb2 (6.Bd3 a5 7.Bb2 0-0 8.b5 cb5 9.Nb5 Na6 10.0-0) 6...a5 7.b5 0-0 8.Bd3 cb5 9.Nb5 Na6 10.0-0; B4) 5...d5 6.Bb2 (6.Bd3 Nbd7 7.Bb2 Bd6 8.0-0 0-0 9.h3 a5 10.e4; 6.h3 Nbd7 7.Bb2 Bd6 8.Bd3 0-0 9.0-0 a5 10.e4; 6.Be2 Bd6 7.0-0 0-0 8.Bb2 Nbd7 9.Rb1 a5 10.b5; 6.g3 a5 7.b5 Bd6 8.Be2 0-0 9.0-0 Nbd7 10.Bb2; 6.h4 Nbd7 7.Bb2 Bd6 8.Bd3 0-0 9.0-0 a5 10.Qe2; 6.Nd4 e5 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Nbd7 10.Bb2; 6.Rb1 Bd6 7.Be2 0-0 8.0-0 Nbd7 9.h3 a5 10.b5) 6...Nbd7 7.Bd3 Bd6 8.0-0 0-0 9.e4 Ne5 10.Qe2.

4.c4 Bg7 5.Bb2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6).

4.c4 Bg7 5.Bb2 0-0 6.Be2 d6 7.d4 (---> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d6 6.d4 c6 7.Be2).

4.Be2 a5 5.ba5 Qa5 (5...Na6 6.d4 (6.Bb2 Qa5 7.Bc3 Qf5 8.h3 Bh6 9.g4 Qc5 10.h4; 6.Nc3 Qa5 7.Bb2 Bg7 8.Ne4 0-0 9.Nf6 Bf6 10.Bf6) 6...Qa5 7.Bd2 Qc7 8.Nc3 Bg7 9.0-0 d5 10.Rb1; 5...Bg7 6.d4 (6.0-0 0-0 7.d4 d5 8.c4 Bg4 9.Bd2 c5 10.Nc3; 6.Nc3 Qa5 7.0-0 Na6 8.Bb2 0-0 9.d4 d5 10.Ne5) 6...0-0 7.Bd2 d5 8.0-0 Ne4 9.c4 Nd2 10.Nbd2; 5...Ra5 6.d4 (6.Bb2 Na6 7.Bc3 Ra4 8.Bd4 Ra5 9.0-0 Nc5 10.Nc3; 6.0-0 Bg7 7.d4 0-0 8.Bd2 Ra7 9.c4 Na6 10.Nc3; 6.Nc3 Bg7 7.0-0 Na6 8.Nd4 Nc5 9.Bb2 0-0 10.Nb3) 6...Bg7 7.Bd2 Ra8 8.0-0 0-0 9.c4 d6 10.Nc3) 6.0-0 (6.Bb2 Bg7 7.Bc3 Qc7 8.h4 d6 9.h5 Nbd7 10.h6; 6.Nc3 Bg7 7.Rb1 b5 8.a3 Na6 9.0-0 0-0 10.Ne5; 6.h3 Bg7 7.0-0 0-0 8.d4 d5 9.Bd2 Qc7 10.Nc3; 6.Nd4 Na6 7.Nc3 Bg7 8.Rb1 Nc5 9.0-0 0-0 10.f4; 6.g3 Bg7 7.0-0 0-0 8.Bb2 Na6 9.Bc3 Qc7 10.Na3; 6.h4 Bg7 7.Nd4 c5 8.Nb3 Qb6 9.Nc3 Nc6 10.Rb1; 6.a4 Bg7 7.0-0 0-0 8.Bb2 Na6 9.Nc3 d6 10.Nd4; 6.a3 Bg7 7.Bb2 0-0 8.Nc3 Na6 9.0-0 Nc5 10.Ne5) 6...Bg7 (6...Na6 7.d4 Bg7 8.Bd2 Qc7 9.Nc3 0-0 10.Rb1) 7.Bb2 (7.d4 d5= (7...0-0 8.Bd2 Qc7 9.c4 d6 10.Nc3) 8.Bd2 Qc7 9.c4 Be6 10.Ng5; 7.d3 Na6 8.Nbd2 0-0 9.Nc4 Qc7 10.Bd2) 7...0-0 (7...d5 8.c4= (8.Bc3 Qb6 9.a4 Nbd7 10.a5) 8...0-0 9.cd5 Nd5 10.Bg7) 8.d4 (8.c4 d5= (8...Na6 9.Nc3 d6 10.Qa4) 9.Nc3 dc4 10.Bc4; 8.Nc3 d5 9.d4 Nbd7 10.Bd3) 8...Qb6 (8...d5 9.c4= (9.Nc3 Nbd7 10.Bd3) 9...Be6 10.Ng5) 9.Qc1 d5 10.c4 (10.Nbd2+=) 10...Bf5 11.Nh4 Be6 12.c5 Qc7 13.Nc3 Nbd7 (13...Bg4 14.f3 Bc8 15.f4=) 14.h3 (14.Bd3 Rfb8=) 14...b6 (14...Ne4 15.a3=) 15.cb6 Nb6 (15...Qb6 16.a4=) 16.Ba3 (16.Nf3!?=) 16...Na4 17.Bb4 Nc3 18.Bc3 Ne4 19.Bb2 Rfb8 20.Bd3 (20.Qc2 Bf6 21.Nf3 Bf5+=) 20...c5 21.Qc2 Nd6 22.Be2 (22.a4 c4 23.Be2 Bd7–/+) 22...c4 23.a3 Bf6 24.Nf3 Bf5 25.Qc1 Ne4 26.Ra2 c3 (26...Rc8 27.Ba1–/+) 27.Ba1 Bd7 (27...Rb3 28.a4+=) 28.Bd3 (28.Nd2 Nd2 29.Rd2 Ra3 30.Qa3 cd2+=) 28...Ba4 0–1. Grimm,Wolfgang (1975) – Trokenheim,Marek (2175), remoteschach.de, 2010.

4.Be2 a5 5.b5 A) 5...cb5 6.Bb5 (6.Na3 b4 7.Nc4 Nc6 8.0-0 Bg7 9.Bb2 0-0 10.a3; 6.Nc3 b4 7.Nb5 Nc6 8.0-0 Bg7 9.Bb2 0-0 10.Bd3) 6...Bg7 7.Nc3 Nc6 8.0-0 0-0 9.Rb1 Qc7 10.Ba3; B) 5...Bg7 6.Nc3 (6.Bb2 cb5 7.Bb5 0-0 8.0-0 Nc6 9.Nc3 d5 10.Rb1; 6.0-0 cb5 7.Bb5 Ne4 8.Nc3 Nc3 9.dc3 Bc3 10.Rb1; 6.c4 Ne4 7.d4 d5 8.Nfd2 Nd2 9.Bd2 dc4 10.Bc4) 6...cb5 7.Nb5 0-0 8.Bb2 Nc6 9.0-0 d5 10.d3; C) 5...Bh6 6.Bb2 (6.Nc3 cb5 7.Nb5 Nc6 8.Bb2 0-0 9.0-0 d5 10.a4; 6.Na3 0-0 7.0-0 d5 8.Bb2 Qd6 9.c4 Bg4 10.h3) 6...0-0 7.Nc3 cb5 8.Nb5 Nc6 9.0-0 d5 10.a4; D) 5...d5= 6.Nc3 (6.a4 Bg7 7.Nc3 0-0 8.0-0 cb5 9.ab5 Ne4 10.Nd4; 6.c4 Bg7 7.Nc3 Ne4 8.Bb2 0-0 9.0-0 Be6 10.cd5; 6.Ba3 cb5 7.Bb5 Nc6 8.Nd4 Bd7 9.Nc3 e5 10.Bf8; 6.0-0 cb5 7.Bb5 Nc6 8.Nc3 Bg7 9.Nd4 Qc7 10.Ba3; 6.Na3 Bg7 7.Bb2 0-0 8.0-0 Qd6 9.Bd3 Nbd7 10.Qe2) 6...cb5 7.Nb5 Nc6 8.0-0 Bg7 9.d3 0-0 10.Bb2.

4.Be2 Na6 A) 5.b5 A1) 5...Nc5 6.Ba3 (6.Bb2 Bg7 7.Nc3 0-0 8.0-0 cb5 9.Nb5 a6 10.Bd4; 6.Nc3 Bg7 7.0-0 0-0 8.Ba3 Nce4 9.Nd4 c5 10.Ne4; 6.0-0 Bg7 7.Nc3 0-0 8.Ba3 Nce4 9.Bb2 d5 10.bc6) 6...Nce4 7.Nc3 Bg7 8.0-0 Nc3 9.dc3 Ne4 10.c4; A2) 5...cb5 6.Bb5 (6.Na3 b4 7.Nc4 Bg7 8.Bb2 0-0 9.0-0 d5 10.Nce5; 6.Bb2 b4 7.g4 h6 8.Ne5 Qb6 9.a4 Nc5 10.d4; 6.Nc3 b4 7.Nb5 Bg7 8.Bb2 0-0 9.0-0 d6 10.a3) 6...Nc7 7.Bd3 Ncd5 8.Bb2 Bg7 9.Nc3 Nb4 10.0-0; B) 5.a3 B1) 5...Bg7 6.Bb2 (6.Nc3 0-0 7.0-0 d5 8.Bb2 Qd6 9.Na4 Ne4 10.Bg7; 6.d4 0-0 7.0-0 d5 8.Nbd2 Qd6 9.Bb2 Bf5 10.c4; 6.0-0 Ne4 7.d4 0-0 8.Bb2 d5 9.Nc3 Nd6 10.Qd2) 6...c5 7.Ba6 ba6 8.bc5 0-0 9.0-0 Bb7 10.Bf6; B2) 5...d5 6.Bb2 Bg7 7.Bd4 0-0 8.Nc3 Nc7 9.0-0 a6 10.a4; B3) 5...c5 6.b5 (6.Nc3 cb4 7.ab4 Nb4 8.Ba3 e6 9.Ne5 Be7 10.0-0 ; 6.0-0 Bg7 7.Ba6 ba6 8.Nc3 0-0 9.bc5 Ne4 10.Bb2; 6.Ba6 ba6 7.bc5 Bg7 8.d4 d6 9.Nc3 dc5 10.0-0) 6...Nc7 7.Nc3 Bg7 8.0-0 0-0 9.Bb2 d6 10.h4.

4.Be2 e6 5.0-0 Bb4 6.Nc3 (6.a3 Be7 7.Nc3 0-0 8.e4 Qa5 9.Qe1 d5 10.d3; 6.Ba3 c5 7.Bb4 cb4 8.c3 Nc6 9.cb4 Nb4 10.Nc3; 6.Bb2 0-0 7.a3 Be7 8.Nc3 d5 9.h3 Nbd7 10.d4; 6.h3 0-0 7.Ba3 Ba3 8.Na3 d5 9.Nb1 c5 10.Nc3; 6.g3 Na6 7.Ba3 Ba3 8.Na3 b5 9.c4 b4 10.Nc2; 6.h4 d5 7.c4 0-0 8.Nc3 Na6 9.Bb2 Nc5 10.Qc2; 6.c3 Be7 7.d4 0-0 8.Nbd2 d5 9.Qb3 Qa5 10.c4; 6.Nd4 0-0 7.Nc3 c5 8.Ndb5 Nc6 9.a3 Ba5 10.Nd6; 6.Re1 0-0 7.Nc3 Na6 8.a3 Ba5 9.Bb2 d5 10.Ne5; 6.Qe1 0-0 7.a3 Be7 8.Nc3 d5 9.Ne5 Nbd7 10.f4) 6...Na6 7.a3 Be7 8.d4 0-0 9.e4 d5 10.e5.

4.Be2 e6 5.a3 A) 5...d5 6.Bb2 (6.Nc3 Bd6 7.0-0 0-0 8.Bb2 Nbd7 9.Ng5 e5 10.d3; 6.0-0 Nbd7 7.c4 dc4 8.Nc3 Bd6 9.Bc4 0-0 10.Bb2; 6.h3 Nbd7 7.Nc3 Bd6 8.Bb2 0-0 9.0-0 a5 10.b5; 6.g3 Nbd7 7.Nc3 Bd6 8.Bb2 0-0 9.0-0 e5 10.d3; 6.Ng5 a5 7.b5 cb5 8.Nc3 Nc6 9.Nb5 Bg7 10.Bb2; 6.Nd4 Bd6 7.f4 a5 8.b5 c5 9.Nf3 0-0 10.0-0) 6...Nbd7 7.Nc3 Bd6 8.0-0 0-0 9.Rb1 Qc7 10.g3; B) 5...c5 6.bc5 (6.b5 a6 7.c4 ab5 8.cb5 d5 9.0-0 Bd6 10.Nc3; 6.Nc3 cb4 7.Nb5 Nc6 8.Bb2 Rb8 9.0-0 a6 10.Nbd4; 6.0-0 cb4 7.c3 bc3 8.Nc3 Nc6 9.Nb5 Be7 10.Bb2) 6...Bc5 7.d4 Be7 8.0-0 0-0 9.c4 d5 10.Nc3; C) 5...Be7 6.Nc3 (6.Bb2 d5 7.0-0 0-0 8.Nc3 Nbd7 9.Ng5 e5 10.h3) 6...d5 7.0-0 0-0 8.Bb2 Nbd7 9.h3 e5 10.Ng5; D) 5...h5 6.Nc3 (6.c4 a5 7.b5 cb5 8.cb5 d5 9.0-0 Bd6 10.Nc3; 6.Bb2 d5 7.Nc3 Nbd7 8.0-0 Bd6 9.Ng5 0-0 10.f4) 6...d5 7.0-0 Nbd7 8.b5 c5 9.Ng5 Bd6 10.Bb2; E) 5...a5 6.b5 (6.ba5 Na6 7.Nc3 Qa5 8.Bb2 Bg7 9.Ne4 Ne4 10.Bg7; 6.Bb2 ab4 7.0-0 d5 8.ab4 Ra1 9.Ba1 Bb4 10.Nc3; 6.0-0 ab4 7.Bb2 d5 8.c3 bc3 9.Nc3 Nbd7 10.d4) 6...cb5 7.Bb5 Nc6 8.Nc3 d5 9.0-0 Bd6 10.Bb2.

4.Be2 e6 5.Na3 A) 5...Bb4 6.Rb1 (6.c3 Be7 7.Bb2 d5 8.Nc2 Nbd7 9.0-0 0-0 10.c4; 6.Nc4 b5 7.Nce5 d6 8.Nd3 Ba5 9.0-0 e5 10.Ng5) 6...Be7 7.0-0 0-0 8.Nc4 b5 9.Nce5 d6 10.Nd3; B) 5...Na6 6.c3 (6.b5 Nc5 7.bc6 bc6 8.Rb1 Bg7 9.Nc4 Nfe4 10.Ba3) 6...d5 7.Ne5 Bd6 8.f4 0-0 9.0-0 Qc7 10.Qc2; C) 5...d5 6.Rb1 (6.c3 Bd6 7.0-0 0-0 8.Bb2 Nbd7 9.Qb3 a5 10.Nc2) 6...Nbd7 7.0-0 Bd6 8.c4 0-0 9.Bb2 b6 10.b5.

4.Be2 e6 5.Bb2 Bb4 6.0-0 (6.Na3 0-0 7.Nc4 d5 8.c3 Be7 9.Nce5 Nbd7 10.0-0; 6.Nc3 0-0 7.g4 Ng4 8.a3 Be7 9.Rg1 Nf6 10.h4; 6.g4 0-0 7.g5 Ne4 8.Nc3 Bc3 9.Bc3 Na6 10.h4; 6.c3 Be7 7.c4 Na6 8.Nc3 0-0 9.0-0 Nc5 10.Qc2) 6...0-0 7.c4 c5 8.Qc2 Nc6 9.Nc3 d5 10.a3.

4.Be2 e6 5.Nc3 Bb4 6.0-0 (6.a3 Be7 7.e4 Qa5 8.0-0 0-0 9.Bb2 Na6 10.d4; 6.Rb1 Qa5 7.0-0 0-0 8.Bb2 Na6 9.e4 Be7 10.e5; 6.h3 0-0 7.Rb1 Qa5 8.0-0 Na6 9.Bb2 Be7 10.d3) 6...Na6 7.Bb2 0-0 8.a3 Be7 9.d4 Qc7 10.e4.

4.Be2 Bg7 5.Bb2 A) 5...Na6 6.a3 (6.0-0 Nb4 7.a3 Na6 8.Nc3 0-0 9.d4 d5 10.Ne5) 6...0-0 7.0-0 d6 8.c4 c5 9.b5 Nc7 10.Nc3; B) 5...0-0 6.Nc3 (6.a3 d6 7.0-0 a5 8.Nc3 Na6 9.b5 Nc5 10.bc6 ; 6.0-0 a5 7.b5 cb5 8.Bb5 Nc6 9.Nc3 d5 10.Rb1) 6...Na6 7.a3 d6 8.0-0 Bd7 9.Bc4 Nc7 10.Qe2; C) 5...d5 6.a3 (6.Nc3 0-0 7.0-0 Na6 8.a3 Qd6 9.h3 Be6 10.d4; 6.0-0 0-0 7.Nc3 Na6 8.a3 Qd6 9.Na4 Bg4 10.Ne5; 6.h3 0-0 7.0-0 a5 8.b5 cb5 9.Bb5 Nc6 10.Nc3; 6.Bd4 Qd6 7.c4 dc4 8.Bc4 Nbd7 9.Ng5 Ne5 10.Qb3; 6.h4 0-0 7.0-0 a5 8.b5 cb5 9.Bb5 Bg4 10.Nc3; 6.Bd3 a5 7.b5 cb5 8.Bb5 Nc6 9.Nc3 0-0 10.0-0; 6.g3 0-0 7.Nc3 Nbd7 8.0-0 Nb6 9.d3 Qd6 10.b5) 6...0-0 7.0-0 Bg4 8.Nc3 Nbd7 9.d4 Bf3 10.Bf3; D) 5...Qc7 6.0-0 (6.a3 d6 7.Nc3 0-0 8.0-0 Nbd7 9.h3 Nb6 10.Bd3; 6.Nc3 Na6 7.a3 0-0 8.0-0 d5 9.Na4 Ng4 10.Bg7; 6.h3 0-0 7.Nc3 d5 8.0-0 Na6 9.a3 Ne4 10.d4; 6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 0-0 10.0-0; 6.g4 h6 7.Nc3 0-0 8.g5 hg5 9.Ng5 Na6 10.a3) 6...Na6 7.a3 0-0 8.c4 d6 9.Nc3 e5 10.Ng5; E) 5...a5 6.b5 (6.a3 ab4 7.0-0 0-0 8.ab4 Ra1 9.Ba1 Na6 10.b5 ; 6.g4 ab4 7.g5 Nh5 8.Bg7 Ng7 9.c3 c5 10.d4; 6.ba5 Qa5 7.0-0 0-0 8.Nc3 Na6 9.d4 d5 10.h3) 6...cb5 7.Bb5 Nc6 8.Nc3 0-0 9.0-0 d5 10.Rb1.

4.Be2 Bg7 5.Nc3 A) 5...d6 6.Bb2 (6.0-0 0-0 7.Rb1 Na6 8.Ba3 Nc7 9.Bd3 Ncd5 10.Nd5; 6.a3 0-0 7.0-0 Na6 8.Bb2 Bd7 9.Bc4 d5 10.Bd3; 6.Rb1 0-0 7.Ng5 Na6 8.0-0 Nd5 9.Nd5 cd5 10.a3; 6.h3 Na6 7.Ba3 0-0 8.0-0 Nc7 9.Bb2 Ne6 10.d4; 6.h4 0-0 7.0-0 a5 8.b5 cb5 9.Nb5 Ne4 10.d4; 6.Ba3 0-0 7.0-0 Na6 8.Bc4 d5 9.Bd3 Qd6 10.Qb1; 6.Ng5 0-0 7.0-0 Na6 8.a3 Bd7 9.Bb2 c5 10.b5; 6.Bc4 d5 7.Be2 Na6 8.a3 0-0 9.0-0 Qd6 10.Bb2) 6...0-0 7.0-0 Na6 8.a3 Nc7 9.Bd3 Bd7 10.Ne4; B) 5...0-0 6.Bb2 (6.a3 d6 7.Bb2 Na6 8.0-0 Bd7 9.Bc4 Nc7 10.Qe2; 6.0-0 a5 7.Rb1 ab4 8.Rb4 Na6 9.Rh4 d6 10.h3; 6.Rb1 d6 7.0-0 Na6 8.h3 Bd7 9.Ng5 Nc7 10.Nce4; 6.Ba3 a5 7.b5 cb5 8.Bb5 Nc6 9.0-0 d5 10.Rb1; 6.h3 a5 7.b5 cb5 8.Bb5 Nc6 9.Bb2 d5 10.0-0 ) 6...Na6 7.a3 d5 8.0-0 Qd6 9.h3 Bf5 10.Na4; C) 5...d5 6.0-0 (6.Bb2 0-0 7.0-0 Na6 8.a3 Qd6 9.h3 Be6 10.d4 ; 6.Rb1 0-0 7.0-0 Qd6 8.h3 Nbd7 9.d4 Nb6 10.Ne5; 6.h3 0-0 7.0-0 Qd6 8.Ba3 Na6 9.Qb1 Ne4 10.Qb2; 6.a3 Qd6 7.Bb2 0-0 8.0-0 Nbd7 9.d4 Nb6 10.Ne5; 6.Nd4 0-0 7.f4 a5 8.ba5 c5 9.Nb3 c4 10.Nd4; 6.Ng5 h6 7.Nf3 0-0 8.0-0 Qd6 9.Rb1 Bd7 10.Ba3; 6.g3 0-0 7.Bb2 Nbd7 8.0-0 Nb6 9.Re1 Qd6 10.b5; 6.Ba3 0-0 7.0-0 Qd6 8.Qc1 Na6 9.Qb2 Bg4 10.d4) 6...0-0 7.Bb2 Na6 8.a3 Qd6 9.h3 Be6 10.d4; D) 5...Na6 6.Rb1 (6.Ba3 0-0 7.0-0 d6 8.b5 cb5 9.Bb5 Qa5 10.Qc1; 6.a3 0-0 7.0-0 d5 8.Bb2 Qd6 9.h3 Be6 10.d4; 6.b5 Nc5 7.0-0 0-0 8.Ba3 Nce4 9.Nd4 c5 10.Ne4) 6...0-0 7.0-0 d6 8.e4 d5 9.e5 Ne4 10.Qe1; E) 5...a5 6.Rb1 (6.b5 cb5 7.Nb5 d5 8.Bb2 Nc6 9.0-0 0-0 10.a4) 6...ab4 7.Rb4 Na6 8.Ra4 b5 9.Rf4 0-0 10.0-0.

4.Be2 Bg7 5.d4= A) 5...0-0 6.0-0 (6.Bd2 d5 7.Nc3 Qd6 8.0-0 Nbd7 9.Qb1 a5 10.a3; 6.Nc3 a5 7.b5 cb5 8.Nb5 Nc6 9.0-0 d5 10.c4) 6...d5 7.Nc3 a5 8.b5 cb5 9.Nb5 Nc6 10.c4; B) 5...Na6 6.a3 (6.Bd2 d6 7.b5 cb5 8.Bb5 Bd7 9.Nc3 Bb5 10.Nb5 ; 6.Ba3 d5 7.0-0 0-0 8.Nbd2 Qd6 9.Qc1 b5 10.Qb2; 6.c3 0-0 7.Nbd2 Nc7 8.Bb2 d6 9.0-0 Bf5 10.Qb3; 6.0-0 Nb4 7.Bd2 c5 8.Nc3 0-0 9.a3 Nc6 10.d5) 6...0-0 7.0-0 d5 8.Nbd2 Bf5 9.Ne5 Qc7 10.Bb2; C) 5...d5 6.Nc3 (6.0-0 a5 7.ba5 0-0 8.Bd2 Ne4 9.c4 Nd2 10.Nbd2; 6.Nbd2 a5 7.c3 ab4 8.cb4 Qd6 9.Qb3 0-0 10.0-0; 6.Bd2 Qd6 7.c4 dc4 8.Bc4 0-0 9.Nc3 Bf5 10.Qe2; 6.c4 0-0 7.Nc3 dc4 8.Bc4 Na6 9.Ba3 Nd5 10.Qb3; 6.h3 Na6 7.Nc3 Nb4 8.a3 Na6 9.0-0 0-0 10.Rb1; 6.c3 0-0 7.Nbd2 Bf5 8.0-0 Nbd7 9.Nh4 Be6 10.Nhf3) 6...Qd6 7.0-0 0-0 8.Rb1 Bf5 9.Bd3 e6 10.Bd2.

5.a3 A) 5...d5 6.Bb2 (6.Bd3 Bg7 7.0-0 0-0 8.Bb2 Qd6 9.Na4 Ne4 10.Bg7; 6.Be2 Bg7 7.0-0 0-0 8.Bb2 Qc7 9.h3 Ne4 10.d4; 6.d4 Bg7 7.Bd3 Nc7 8.0-0 0-0 9.Bd2 Ne6 10.Ne5; 6.h3 Bg7 7.Bb2 0-0 8.Ba6 ba6 9.0-0 a5 10.Na4; 6.Ba6 ba6 7.0-0 Bg7 8.Bb2 0-0 9.Ne2 Bg4 10.Ne5; 6.Ra2 Bg7 7.Bb2 0-0 8.Bd3 Qd6 9.0-0 e5 10.Ba6; 6.Ne5 Nd7 7.Nd7 Bd7 8.Bd3 Bg7 9.Bb2 0-0 10.0-0; 6.h4 Bg7 7.Bd3 0-0 8.Bb2 Bg4 9.Ne2 Qb6 10.Nf4; 6.Ng5 Bh6 7.h4 0-0 8.Bb2 d4 9.ed4 Qd4 10.Qe2; 6.Rb1 Bg7 7.Bb2 0-0 8.Bd3 Qd6 9.Ne2 Ne4 10.Bg7; 6.g3 Bg7 7.Bb2 0-0 8.Bg2 Ne4 9.0-0 Bg4 10.Qc1) 6...Bg7 7.Bd3 0-0 8.0-0 Qd6 9.Na4 Ne4 10.Bg7; B) 5...Qc7 6.Bb2 (6.h3 Bg7 7.Bd3 d5 8.0-0 0-0 9.Bb2 e5 10.Na4; 6.Bd3 Bg7 7.Bb2 0-0 8.0-0 e5 9.e4 d5 10.ed5; 6.d4 Bg7 7.b5 cb5 8.Nb5 Qb6 9.Bd3 0-0 10.0-0) 6...Bg7 7.Bd3 0-0 8.0-0 d5 9.Na4 Ne4 10.Bg7; C) 5...Bg7 6.Bb2 (6.Bd3 0-0 7.0-0 d5 8.Bb2 Qd6 9.Na4 Ne4 10.Bg7; 6.Be2 0-0 7.0-0 d5 8.Bb2 Qc7 9.h3 Ne4 10.d4; 6.h3 0-0 7.Bb2 d5 8.Bd3 c5 9.b5 c4 10.ba6; 6.d4 0-0 7.Bd3 Nc7 8.0-0 d5 9.Bb2 a5 10.Ne5) 6...0-0 7.Bd3 d5 8.0-0 Qd6 9.Na4 Ne4 10.Bg7.

5.Ba3 A) 5...e6 6.Rb1 Bd6 7.e4 Qb6 8.e5 Ng4 9.d4 Be7 10.Qd2; B) 5...d6 6.b5 (6.Rb1 Nc7 7.Bd3 Bg7 8.0-0 0-0 9.b5 cb5 10.Nb5) 6...Nc5 7.bc6 bc6 8.Bc5 dc5 9.Ne5 Qd6 10.Qf3; C) 5...Bg7 6.b5 (6.Bd3 0-0 7.0-0 d6 8.h3 Bd7 9.Rb1 Nc7 10.Rb3; 6.Rb1 0-0 7.Bd3 d6 8.0-0 Nc7 9.b5 cb5 10.Nb5; 6.Ng5 0-0 7.Bd3 h6 8.Nf3 Nd5 9.Nd5 Ba1 10.Qa1) 6...Nc7 7.Nd4 0-0 8.Bd3 Nb5 9.Ncb5 cb5 10.Nb5; D) 5...d5 6.h3 (6.Rb1 Qd6 7.Rb3 Nc7 8.Na4 b5 9.Nc5 Ne6 10.Bb2; 6.Bd3 Qd6 7.Rb1 Bg7 8.0-0 0-0 9.Qe2 Nc7 10.Rb3; 6.Ba6 ba6 7.0-0 Qc7 8.Qe2 Bg7 9.Nd4 e5 10.Nb3; 6.Qb1 Qd6 7.h3 e5 8.b5 Qa3 9.ba6 ba6 10.Ne5) 6...Qd6 7.Qb1 Bg7 8.Qb3 0-0 9.d4 Nc7 10.b5.

5.Ba6 ba6 6.Bb2 (6.0-0 Bg7 7.Qe2 0-0 8.Bb2 Qb6 9.Rab1 d6 10.Ng5; 6.Qe2 Bg7 7.0-0 0-0 8.Bb2 Qb6 9.Rab1 d6 10.Ng5; 6.a3 Bg7 7.0-0 0-0 8.Bb2 d6 9.Qe2 Qb6 10.Rab1) 6...Rb8 7.a3 a5 8.Ne4 ab4 9.ab4 a5 10.Ra5.

5.Rb1 A) 5...Nc7 6.Bb2 (6.Bd3 Bg7 7.0-0 0-0 8.Bb2 d5 9.h3 a5 10.b5; 6.Ba3 Bg7 7.Bd3 0-0 8.0-0 Ncd5 9.Nd5 cd5 10.Bb2; 6.Be2 Bg7 7.0-0 0-0 8.Bb2 d6 9.Ng5 Bd7 10.Bf3) 6...Bg7 7.Bd3 0-0 8.0-0 d6 9.Qe2 a5 10.b5; B) 5...Bg7 6.Ba3 (6.Be2 0-0 7.0-0 Nc7 8.h3 d6 9.e4 a5 10.Ng5; 6.b5 Nc7 7.Bd3 cb5 8.Nb5 Nb5 9.Rb5 a6 10.Rb3; 6.h3 0-0 7.Bd3 d6 8.0-0 Bd7 9.Qe2 Nc7 10.Bb2; 6.Bd3 0-0 7.0-0 d5 8.h3 Qd6 9.b5 Nb4 10.bc6; 6.a3 0-0 7.Bd3 d5 8.0-0 Qd6 9.Bb2 e5 10.Be2; 6.h4 0-0 7.Ba3 Nc7 8.Bd3 d5 9.b5 Ne4 10.Ne4) 6...0-0 7.Bd3 Nc7 8.Bb2 a5 9.b5 cb5 10.Nb5; C) 5...Bh6 6.Ba3 (6.Bd3 d5 7.Ba3 Qd6 8.0-0 0-0 9.Rb3 Nc7 10.Bb2; 6.Be2 0-0 7.0-0 d5 8.b5 cb5 9.Nb5 Nc7 10.Nc3; 6.h3 0-0 7.Bd3 d5 8.Ba3 Qd6 9.0-0 Nc7 10.Qc1; 6.b5 Nc7 7.Be2 0-0 8.0-0 cb5 9.Nb5 d6 10.Nc3; 6.h4 Bg7 7.Be2 0-0 8.0-0 d6 9.Ba3 Nc7 10.b5) 6...0-0 7.Bd3 d5 8.b5 cb5 9.Rb5 Nc7 10.Rb3; D) 5...d6 6.b5 (6.Ba3 Nc7 7.Bd3 Bg7 8.0-0 0-0 9.b5 c5 10.Ng5; 6.Bc4 Bg7 7.h3 0-0 8.Ba3 Nc7 9.0-0 Ncd5 10.Nd5; 6.Bd3 Bg7 7.0-0 0-0 8.Ba3 Nc7 9.b5 c5 10.Ng5) 6...cb5 7.Bb5 Bd7 8.0-0 Bh6 9.d4 0-0 10.Bd2; E) 5...d5 6.b5 Nc5 7.bc6 bc6 8.Ba3 e6 9.Ne5 Bd7 10.Qf3; F) 5...e6 6.Ba3 (6.a3 Be7 7.Bd3 0-0 8.0-0 Nc7 9.Bb2 a5 10.b5; 6.b5 Nc5 7.bc6 dc6 8.Be2 Bd6 9.Ba3 Qa5 10.Bb4) 6...Bd6 7.Ng5 0-0 8.Qf3 Nd5 9.Nge4 Be7 10.Ba6.

5.b5 A) 5...Nb4 6.e4 (6.a3 Nbd5 7.Nd5 cd5 8.Bb2 Bg7 9.Bd3 0-0 10.0-0; 6.Bb2 Bg7 7.a3 Nbd5 8.Bd3 0-0 9.0-0 d6 10.Rb1; 6.Ba3 e6 7.Bb2 Be7 8.a3 Nbd5 9.Bd3 0-0 10.0-0; 6.Rb1 a5 7.Bb2 Bg7 8.a3 Nbd5 9.Bd3 0-0 10.0-0) 6...cb5 7.Rb1 e6 8.a3 Nc6 9.Bb5 Bg7 10.0-0; B) 5...Nc7 6.Bb2 (6.bc6 dc6 7.Bb2 Bg7 8.Bd3 0-0 9.0-0 Ne6 10.Ba3; 6.a4 Bg7 7.Bb2 0-0 8.Bd3 Ncd5 9.Nd5 cd5 10.0-0; 6.Bd3 Nb5 7.Nb5 cb5 8.Bb2 Bg7 9.0-0 0-0 10.Bb5; 6.Be2 cb5 7.Nb5 Nb5 8.Bb5 Bg7 9.Bb2 0-0 10.0-0; 6.Rb1 Bg7 7.Bd3 cb5 8.Nb5 Nb5 9.Rb5 a6 10.Rb3; 6.h4 Bg7 7.Bb2 0-0 8.a4 Ncd5 9.Bd3 d6 10.0-0; 6.Nd4 c5 7.Nb3 d6 8.Qf3 Bg7 9.Bb2 0-0 10.h3) 6...Bg7 7.bc6 bc6 8.Rb1 0-0 9.Bd3 Rb8 10.0-0; C) 5...Nc5 6.Ba3 (6.d4 Nce4 7.Ne4 Ne4 8.Bd3 d5 9.bc6 bc6 10.Ne5) 6...e6 7.bc6 bc6 8.Rb1 Qa5 9.Qc1 Nd3 10.Bd3.

5.a3 A) 5...Bg7 6.Bb2 (6.Be2 Qd6 7.Bb2 0-0 8.0-0 Nbd7 9.d4 Nb6 10.Ne5; 6.g3 0-0 7.Bb2 a5 8.Be2 Na6 9.b5 Nc5 10.0-0; 6.h3 0-0 7.Be2 Qd6 8.0-0 Nbd7 9.Bb2 a5 10.b5; 6.d4 0-0 7.Bd3 a5 8.Bb2 ab4 9.ab4 Ra1 10.Qa1) 6...0-0 7.Be2 Qd6 8.0-0 Nbd7 9.d4 Nb6 10.Ne5; B) 5...Qd6 6.Bb2 (6.Be2 Bg7 7.h3 0-0 8.0-0 Nbd7 9.d4 Nb6 10.Ne5; 6.h3 Nbd7 7.Bb2 a5 8.Bd3 e5 9.Be2 Bg7 10.0-0; 6.h4 Bg7 7.Bb2 0-0 8.Be2 Nbd7 9.Ng5 Nb6 10.0-0) 6...Bg7 7.Bd3 0-0 8.Nd4 e5 9.Nb3 e4 10.Be2.

5.Ba3 A) 5...e6 6.Qc1 (6.Qb1 a5 7.Qb2 ab4 8.Bb4 c5 9.Ba3 Be7 10.Bb5) 6...Nbd7 7.b5 Nc5 8.bc6 bc6 9.Ne5 Qc7 10.Nc6; B) 5...Qd6 6.Qc1 (6.Rb1 Bg7 7.Be2 0-0 8.0-0 Nbd7 9.Rb3 b5 10.h3; 6.Bd3 Bg7 7.0-0 0-0 8.h3 a5 9.Rb1 Na6 10.Ba6; 6.Qb1 a5 7.Qb3 e5 8.Rb1 b5 9.Qb2 Na6 10.Nb5; 6.Be2 Bg7 7.Qc1 Na6 8.Qb2 b5 9.0-0 0-0 10.h3) 6...Na6 7.Rb1 e5 8.b5 Qa3 9.Qa3 Ba3 10.ba6; C) 5...Bh6 6.Bd3 (6.Qc1 0-0 7.Bd3 Bg4 8.h3 Bf3 9.gf3 Nbd7 10.Be2; 6.Rb1 0-0 7.Bd3 Qd6 8.Rb3 e5 9.b5 c5 10.e4; 6.h3 Qd6 7.Qc1 0-0 8.b5 c5 9.Be2 Be6 10.0-0; 6.Qb1 0-0 7.Be2 Bg4 8.b5 Nbd7 9.bc6 bc6 10.Qb7) 6...Qd6 7.0-0 0-0 8.h3 Nbd7 9.Qc1 Ne5 10.Ne5; D) 5...Na6 6.Rb1 (6.h3 Qd6 7.Rb1 Bh6 8.Rb3 Nc7 9.Na4 Ne6 10.Bb2; 6.Ba6 ba6 7.0-0 Qd6 8.Nd4 Bg7 9.f4 Bg4 10.Qe1; 6.Qb1 Qd6 7.Bd3 Bg7 8.0-0 0-0 9.Qb3 Bg4 10.Nd4; 6.Bd3 Qd6 7.Rb1 Bg7 8.0-0 0-0 9.h3 Nc7 10.Rb3) 6...Qd6 7.Rb3 Nc7 8.Na4 b5 9.Nc5 Ne6 10.Bb2; E) 5...Bg7 6.Bd3 (6.Be2 0-0 7.0-0 Qd6 8.Qc1 Na6 9.Qb2 Bg4 10.d4; 6.Rb1 0-0 7.Bd3 Qd6 8.0-0 Nbd7 9.Rb3 e5 10.Be2; 6.Nd4 0-0 7.f4 Qd6 8.Be2 Na6 9.Rb1 Nc7 10.0-0; 6.Bb2 Qd6 7.a3 0-0 8.Be2 Nbd7 9.0-0 Nb6 10.b5; 6.g3 0-0 7.Bg2 Ne4 8.Bb2 Bg4 9.h3 Bf3 10.Bf3; 6.Ng5 0-0 7.Be2 Qd6 8.Rb1 Nbd7 9.0-0 Nb6 10.h3; 6.h3 Qd6 7.Rb1 0-0 8.Be2 Ne4 9.Bb2 Na6 10.Ba6; 6.h4 0-0 7.Rb1 Qd6 8.Be2 Nbd7 9.Qc1 b5 10.0-0; 6.Qc1 Bg4 7.Be2 0-0 8.0-0 Nbd7 9.Bb2 Qb6 10.a3) 6...Qd6 7.0-0 0-0 8.Qc1 Na6 9.Qb2 Bg4 10.Qb3.

5.a4 A) 5...Nbd7 6.b5 (6.Be2 Bg7 7.0-0 0-0 8.a5 c5 9.b5 Ne4 10.Bb2; 6.Ba3 Bg7 7.Bd3 e5 8.Be2 0-0 9.0-0 Re8 10.a5; 6.g3 Bg7 7.Be2 0-0 8.0-0 Nb6 9.b5 Bh3 10.bc6; 6.h3 Bg7 7.Bd3 a5 8.b5 Nc5 9.Ba3 Nd3 10.cd3; 6.h4 Bg7 7.Be2 Qc7 8.Nd4 e5 9.Nb3 Qd6 10.b5; 6.Rb1 Bg7 7.Bd3 0-0 8.0-0 a5 9.b5 Nc5 10.Ba3; 6.a5 e5 7.Ba3 Bd6 8.Be2 0-0 9.0-0 Ne4 10.b5; 6.Bb2 e6 7.b5 Bd6 8.Be2 0-0 9.0-0 Qc7 10.Rb1) 6...Bg7 7.Rb1 c5 8.Be2 Nb6 9.a5 Nc4 10.Bc4; B) 5...Bh6 6.Ba3 (6.b5 Nbd7 7.Rb1 cb5 8.Bb5 a6 9.Be2 Nc5 10.Ba3) 6...Nbd7 7.b5 Ne4 8.bc6 bc6 9.Nd4 Nc3 10.dc3; C) 5...Bg7 6.Bd3 (6.b5 0-0 7.Bd3 Ne4 8.Bb2 Nd7 9.bc6 bc6 10.Rb1; 6.Be2 0-0 7.0-0 Na6 8.Rb1 Qd6 9.b5 Nb4 10.bc6; 6.Ba3 Ne4 7.Bb2 0-0 8.Be2 Na6 9.Rb1 Nd6 10.b5; 6.Rb1 Qd6 7.Be2 0-0 8.0-0 Na6 9.b5 Nb4 10.bc6) 6...Na6 7.Ba3 Qd6 8.Qb1 0-0 9.0-0 Bg4 10.Nd4.

5.Rb1 A) 5...Bg7 6.Ba3 (6.Bb2 Qd6 7.e4 Qb4 8.Bd3 Qc5 9.0-0 0-0 10.Qc1; 6.Rb3 0-0 7.Ba3 Ne4 8.Bb2 Be6 9.Nd4 Bd4 10.ed4; 6.Bd3 Qd6 7.Bb2 Na6 8.Ba6 ba6 9.Ne2 0-0 10.Be5; 6.a4 Qd6 7.Be2 0-0 8.0-0 Nbd7 9.h3 Ne5 10.Ne5; 6.h3 Qd6 7.Be2 0-0 8.0-0 b5 9.Rb3 Nbd7 10.a4; 6.Be2 0-0 7.h3 Qd6 8.0-0 b5 9.Rb3 Nbd7 10.a4; 6.Ng5 0-0 7.Be2 Qd6 8.0-0 Bf5 9.b5 h6 10.Nf3; 6.g3 0-0 7.Bg2 Bg4 8.h3 Bf3 9.Bf3 Nbd7 10.b5; 6.a3 Qd6 7.Bd3 0-0 8.0-0 Nbd7 9.Bb2 a5 10.b5) 6...0-0 7.Bd3 Qd6 8.0-0 Na6 9.Qe2 Nc7 10.Rfe1; B) 5...Qd6 6.h3 (6.Bd3 Bg7 7.Ba3 0-0 8.0-0 Na6 9.h3 Nc7 10.Rb3; 6.Be2 Bg7 7.0-0 0-0 8.h3 Na6 9.b5 Nc5 10.bc6; 6.b5 a6 7.b6 Nbd7 8.Be2 c5 9.0-0 Bg7 10.Ba3; 6.Bb2 Bg7 7.e4 0-0 8.e5 Qe6 9.Ne2 Ng4 10.Ned4; 6.Ba3 Bg7 7.Bd3 0-0 8.0-0 Na6 9.Qe2 Nc7 10.Rb3; 6.a3 Bg7 7.Be2 0-0 8.0-0 Nbd7 9.h3 Nb6 10.d3) 6...Bg7 7.Bd3 0-0 8.0-0 Na6 9.b5 Nb4 10.bc6.

5.Bb2= A) 5...Na6 6.a3 (6.Ba6 ba6 7.0-0 Bg7 8.a3 0-0 9.Na4 Bg4 10.d3; 6.b5 Nc5 7.Ba3 Nfe4 8.Bb2 Nf6 9.Ba3 Nfe4 10.Bb2; 6.Ne5 Qd6 7.f4 Qb4 8.Ba6 ba6 9.Rb1 Qd6 10.0-0) 6...Bg7 7.Bd3 0-0 8.0-0 Qd6 9.Na4 Ne4 10.Bg7; B) 5...Qd6 6.Bd3 (6.h3 Bg7 7.a3 0-0 8.Be2 a5 9.0-0 Nbd7 10.b5 ; 6.Be2 Nbd7 7.0-0 Bg7 8.b5 0-0 9.d4 c5 10.Qd2; 6.b5 Nbd7 7.Be2 Bg7 8.0-0 0-0 9.d4 c5 10.Qd2; 6.g3 Bg7 7.a3 0-0 8.Bg2 a5 9.0-0 Nbd7 10.b5; 6.a3 Bg7 7.Bd3 0-0 8.0-0 e5 9.e4 d4 10.Ne2; 6.Qb1 Bg7 7.a3 0-0 8.Be2 Be6 9.0-0 Nbd7 10.Nd4) 6...Bg7 7.0-0 0-0 8.e4 de4 9.Ne4 Ne4 10.Bg7; C) 5...e6 6.b5 (6.g4 h6 7.b5 Bd6 8.Rg1 e5 9.Be2 Ng4 10.bc6; 6.a3 Nbd7 7.Bd3 Bd6 8.0-0 0-0 9.e4 Ne5 10.Qe2) 6...Bd6 7.Be2 0-0 8.0-0 Nbd7 9.bc6 bc6 10.Rb1; D) 5...Bh6 6.Bd3 (6.h3 Qd6 7.a3 a5 8.g4 g5 9.Na4 Nbd7 10.h4; 6.a3 0-0 7.Be2 Qd6 8.0-0 Nbd7 9.Nd4 e5 10.Nb3) 6...0-0 7.0-0 Qd6 8.a3 Nbd7 9.e4 d4 10.Ne2; E) 5...Nbd7 6.Bd3 (6.Be2 Bg7 7.0-0 0-0 8.Bd3 Nb6 9.b5 cb5 10.Nb5; 6.Rb1 Bg7 7.Bd3 0-0 8.0-0 Qc7 9.Ba3 Qd6 10.Rb3) 6...e6 7.a3 Bd6 8.0-0 0-0 9.h3 a5 10.e4; F) 5...Qc7 6.Bd3 (6.a3 Bg7 7.Bd3 0-0 8.0-0 e5 9.e4 d4 10.Na4; 6.h3 Bg7 7.Bd3 0-0 8.0-0 e5 9.Be2 Nbd7 10.Re1; 6.Na4 Nbd7 7.Bd3 e5 8.Ng5 e4 9.Be2 h6 10.Nh3; 6.Be2 Bg7 7.0-0 0-0 8.b5 Nbd7 9.bc6 bc6 10.Ba3; 6.h4 Nbd7 7.h5 gh5 8.Be2 Rg8 9.g3 Nb6 10.d3; 6.e4 Bg7 7.ed5 0-0 8.Bd3 Nd5 9.Nd5 cd5 10.Bg7; 6.b5 Nbd7 7.Ba3 Qa5 8.Qc1 e5 9.Bf8 Kf8 10.Be2) 6...Bg7 7.0-0 0-0 8.Qe2 Na6 9.a3 e5 10.e4; G) 5...Bg7 6.Bd3 (6.a3 0-0 7.Bd3 Qd6 8.0-0 e5 9.Be2 Nbd7 10.d3; 6.Be2 0-0 7.h3 a5 8.b5 cb5 9.Nb5 Nc6 10.0-0; 6.b5 0-0 7.Bd3 Nbd7 8.bc6 bc6 9.Ba3 c5 10.Rb1; 6.h3 0-0 7.Bd3 Na6 8.a3 c5 9.b5 c4 10.ba6; 6.Rb1 0-0 7.Bd3 Qd6 8.0-0 e5 9.Be2 Nbd7 10.b5) 6...0-0 7.a3 Na6 8.0-0 Qd6 9.Na4 Ne4 10.Bg7.

5.Bd3 A) 5...Qd6 6.Bb2 (6.0-0 Bg7 7.Bb2 0-0 8.b5 Nbd7 9.Qe2 c5 10.e4; 6.a3 Bg7 7.0-0 0-0 8.Re1 e5 9.Be2 a5 10.Bb2) 6...Bg7 7.b5 0-0 8.0-0 Nbd7 9.Qe2 Nc5 10.Ba3; B) 5...Na6 6.Ba3 (6.Rb1 Bg7 7.b5 Nc5 8.bc6 bc6 9.Ba3 Nd3 10.cd3; 6.a3 Bg7 7.Bb2 0-0 8.0-0 Qd6 9.Na4 Ne4 10.Bg7) 6...Qd6 7.Rb1 Bg7 8.h3 0-0 9.0-0 Nc7 10.Rb3; C) 5...e6 6.a3 (6.Rb1 Bd6 7.0-0 0-0 8.Bb2 Bb4 9.e4 Nbd7 10.ed5; 6.e4 de4 7.Ne4 Ne4 8.Be4 Bb4 9.0-0 f5 10.Bd3; 6.Bb2 Bb4 7.g4 h6 8.Rb1 Bd6 9.h4 e5 10.h5) 6...Nbd7 7.0-0 Bd6 8.Bb2 0-0 9.Re1 e5 10.e4; D) 5...Bg7 6.0-0 (6.Bb2 Qd6 7.0-0 0-0 8.a3 e5 9.Be2 Nbd7 10.h3; 6.h3 Qd6 7.0-0 0-0 8.Rb1 e5 9.Be2 Bf5 10.g4; 6.a3 0-0 7.Bb2 Qd6 8.0-0 e5 9.e4 d4 10.Ne2; 6.Ba3 Qd6 7.0-0 0-0 8.Qc1 Nbd7 9.Rb1 Ng4 10.b5; 6.a4 Na6 7.Ba3 Qd6 8.b5 Nc5 9.0-0 0-0 10.h3; 6.Qe2 0-0 7.0-0 Qd6 8.Rb1 e5 9.e4 d4 10.Na4) 6...Qd6 7.a3 0-0 8.Qe2 e5 9.e4 d4 10.Na4.

5.Be2 A) 5...Bg7 6.Rb1 (6.h3 0-0 7.0-0 Qd6 8.Rb1 Nbd7 9.d3 e5 10.b5; 6.Nd4 0-0 7.f4 a5 8.ba5 c5 9.Nb3 c4 10.Nd4; 6.0-0 Qd6 7.Ba3 0-0 8.Qc1 Na6 9.Qb2 Bg4 10.d4; 6.Bb2 Qd6 7.0-0 0-0 8.b5 Nbd7 9.bc6 bc6 10.d4; 6.Ng5 0-0 7.0-0 Qd6 8.Bb2 Qb4 9.Rb1 Qa5 10.Qc1 ; 6.a3 Qd6 7.0-0 Nbd7 8.d4 0-0 9.Bb2 Nb6 10.Ne5; 6.Ba3 0-0 7.0-0 Qd6 8.Qc1 Ne4 9.Bb2 Bg4 10.h3; 6.d4 a5 7.b5 cb5 8.Nb5 Nc6 9.0-0 0-0 10.c4; 6.a4 0-0 7.0-0 Na6 8.Rb1 Qd6 9.b5 Nb4 10.bc6; 6.Bd3 a5 7.b5 cb5 8.Nb5 Ne4 9.Nfd4 Nc6 10.Bb2) 6...Qd6 7.Ba3 0-0 8.0-0 Nbd7 9.Rb3 b5 10.d3; B) 5...e6 6.a3 (6.Rb1 Bd6 7.0-0 0-0 8.h3 Qe7 9.a3 Nbd7 10.Bb2) 6...Bd6 7.0-0 0-0 8.Bb2 Nbd7 9.Ng5 e5 10.d3; C) 5...Qd6 6.0-0 (6.Bb2 Bg7 7.0-0 Nbd7 8.Rb1 0-0 9.h3 Nb6 10.b5; 6.h3 Bg7 7.0-0 0-0 8.Rb1 b5 9.Rb3 Nbd7 10.a4; 6.Rb1 Bg7 7.h3 0-0 8.0-0 b5 9.Rb3 Nbd7 10.a4; 6.a3 Nbd7 7.0-0 Bg7 8.d3 0-0 9.Bb2 Nb6 10.e4) 6...Bg7 7.h3 0-0 8.Rb1 b5 9.Rb3 Nbd7 10.a4.

5.h3 A1) 5...Qd6 6.Be2 (6.Rb1 Bg7 7.Be2 0-0 8.0-0 b5 9.Rb3 Nbd7 10.a4; 6.a4 Nbd7 7.Ba3 Ne4 8.Ne4 de4 9.b5 Qf6 10.Nd4; 6.Bb2 Bg7 7.Be2 Nbd7 8.0-0 Qb4 9.Qc1 Nc5 10.Ba3; 6.Bd3 Bg7 7.0-0 0-0 8.Bb2 e5 9.Be2 Qb4 10.Qc1; 6.a3 a5 7.b5 Nbd7 8.d4 c5 9.Bd3 Bg7 10.0-0; 6.Nd4 Bg7 7.Qf3 0-0 8.Be2 e5 9.Qg3 Qb4 10.Rb1; 6.Ba3 Bg7 7.Bd3 0-0 8.Qc1 e5 9.Be2 Bf5 10.0-0; 6.d4 Bf5 7.Bd3 Nbd7 8.Bd2 Bg7 9.0-0 Bd3 10.cd3) 6...Bg7 7.Rb1 0-0 8.0-0 b5 9.Rb3 Nbd7 10.a4; B) 5...Bg7 6.Bd3 (6.Be2 0-0 7.0-0 Qd6 8.Rb1 b5 9.Rb3 Nbd7 10.a4; 6.Bb2 Qd6 7.Bd3 e5 8.Be2 0-0 9.a3 Nbd7 10.0-0) 6...Qd6 7.0-0 0-0 8.Ba3 a5 9.Rb1 Na6 10.Ba6.

5.a3 A) 5...d5 6.h3 (6.Bb2 0-0 7.Bd3 Qd6 8.0-0 Nbd7 9.e4 de4 10.Be4; 6.Bd3 0-0 7.Bb2 Qd6 8.0-0 Nbd7 9.e4 de4 10.Be4; 6.Be2 0-0 7.0-0 Qd6 8.Bb2 Nbd7 9.d4 Nb6 10.Ne5; 6.d4 0-0 7.Bb2 a5 8.Bd3 ab4 9.ab4 Ra1 10.Qa1; 6.Ra2 0-0 7.Bd3 Qd6 8.0-0 e5 9.e4 a5 10.Rb2; 6.g3 0-0 7.Bb2 a5 8.Bg2 Na6 9.0-0 Bg4 10.b5; 6.Ng5 0-0 7.Be2 Qd6 8.0-0 Nbd7 9.Bb2 Nb6 10.h3; 6.Rb1 0-0 7.Bd3 a5 8.b5 cb5 9.Rb5 b6 10.Bb2; 6.h4 0-0 7.Be2 Qd6 8.0-0 Nbd7 9.Bb2 a5 10.b5) 6...0-0 7.Bd3 Qd6 8.0-0 e5 9.e4 d4 10.Ne2; B) 5...Na6 6.Bd3 (6.Be2 0-0 7.h3 d5 8.0-0 Qd6 9.Bb2 Bf5 10.Na4; 6.h3 0-0 7.Bb2 d5 8.Bd3 c5 9.b5 c4 10.ba6; 6.Bb2 0-0 7.Bd3 d5 8.0-0 Qd6 9.Na4 Ne4 10.Bg7; 6.d4 Nd5 7.Bd2 0-0 8.Bd3 Nc3 9.Bc3 Nc7 10.0-0) 6...0-0 7.Bb2 d5 8.0-0 Qd6 9.Na4 Ne4 10.Bg7; C) 5...a5 6.Bb2 (6.b5 0-0 7.Bb2 d5 8.Bd3 Nbd7 9.bc6 bc6 10.Na4) 6...0-0 7.Bd3 d6 8.0-0 Na6 9.Ne4 Ne4 10.Bg7; D) 5...d6 6.Bd3 (6.Bb2 0-0 7.Bc4 Nbd7 8.0-0 Ne5 9.Ne5 de5 10.Qe2 ; 6.Be2 0-0 7.0-0 a5 8.Bb2 Na6 9.b5 Nc5 10.d4; 6.d4 0-0 7.Bd3 a5 8.Bd2 Bg4 9.0-0 ab4 10.ab4; 6.Bc4 0-0 7.Bb2 Nbd7 8.0-0 Ne5 9.Ne5 de5 10.Qe2; 6.h4 0-0 7.Bb2 Bg4 8.Be2 Nbd7 9.0-0 a5 10.Ng5) 6...0-0 7.Bb2 Nbd7 8.0-0 Ne5 9.Ne5 de5 10.Ne4; E) 5...0-0 6.Bd3 (6.Be2 d5 7.Bb2 Qd6 8.0-0 Nbd7 9.d3 Nb6 10.e4; 6.Bb2 d5 7.Bd3 Qd6 8.0-0 Nbd7 9.e4 de4 10.Be4; 6.h3 d5 7.Bd3 Qd6 8.0-0 e5 9.e4 d4 10.Ne2; 6.g3 d5 7.Bg2 a5 8.Bb2 Na6 9.0-0 Bg4 10.b5) 6...d5 7.0-0 Qd6 8.Bb2 Nbd7 9.e4 de4 10.Be4.

5.Ba3 A) 5...d5 6.Bd3 (6.Rb1 0-0 7.Bd3 Qd6 8.0-0 Nbd7 9.Rb3 Nb6 10.b5; 6.Qc1 0-0 7.Bd3 Bg4 8.Ng5 h6 9.h3 hg5 10.hg4; 6.Be2 0-0 7.0-0 Qd6 8.Qc1 Na6 9.Qb2 Bg4 10.d4; 6.h3 Qd6 7.Bd3 a5 8.Rb1 0-0 9.0-0 Nbd7 10.Re1; 6.g3 Qd6 7.Bd3 0-0 8.0-0 Bg4 9.Rb1 Nbd7 10.Be2; 6.Qb1 0-0 7.Bd3 Bg4 8.Ng5 d4 9.ed4 Qd4 10.0-0; 6.Nd4 0-0 7.f4 Ne4 8.Ne4 de4 9.c3 e5 10.fe5) 6...0-0 7.0-0 Qd6 8.Qe2 a5 9.Rab1 e5 10.e4; B) 5...Nd5 6.Nd5 (6.Bb2 Nb4 7.a3 Nd5 8.Bc4 Nc3 9.Bc3 Bc3 10.dc3) 6...cd5 7.Rc1 Nc6 8.Bd3 a5 9.b5 Nb4 10.0-0; C) 5...a5 6.b5 (6.Qb1 0-0 7.b5 d6 8.Bd3 Nbd7 9.0-0 Nc5 10.Be2) 6...0-0 7.Rb1 cb5 8.Bb5 Nc6 9.0-0 d5 10.Bd3; D) 5...d6 6.Bd3 (6.Bc4 d5 7.Bd3 Qd6 8.Qc1 Na6 9.Qb2 0-0 10.0-0; 6.Be2 Nd5 7.Bb2 0-0 8.0-0 Nb4 9.e4 Nd7 10.a3; 6.Bb2 0-0 7.Bd3 Nbd7 8.0-0 Ne5 9.Ne5 de5 10.a3) 6...0-0 7.0-0 Nbd7 8.h3 Nd5 9.Nd5 cd5 10.Rb1; E) 5...0-0 6.Bd3 Nd5 7.Nd5 cd5 8.c3 d6 9.Qb3 Be6 10.Ng5.

5.Rb1 A) 5...d5 6.Bd3 0-0 7.0-0 Qd6 8.Bb2 e5 9.Be2 Nbd7 10.b5; B) 5...Na6 6.Be2 (6.Ba3 0-0 7.Bd3 d5 8.b5 cb5 9.Rb5 Nc7 10.Rb3; 6.Bd3 d5 7.0-0 0-0 8.Ba3 Qd6 9.Rb3 Nc7 10.Ng5; 6.b5 Nc7 7.Bd3 cb5 8.Nb5 Nb5 9.Rb5 a6 10.Rb3) 6...0-0 7.Ba3 d5 8.b5 cb5 9.Rb5 Nc7 10.Rb3; C) 5...d6 6.Be2 (6.Bb2 0-0 7.Bd3 Nbd7 8.0-0 Qc7 9.Nd4 e5 10.Nb3; 6.Bc4 0-0 7.0-0 d5 8.Be2 Qd6 9.h3 Nbd7 10.b5; 6.Ng5 h6 7.Nf3 Nbd7 8.Be2 0-0 9.0-0 Nb6 10.Bb2; 6.Bd3 0-0 7.0-0 Nbd7 8.Ba3 Ng4 9.Be2 Ndf6 10.b5; 6.Ba3 0-0 7.Bd3 Nbd7 8.0-0 a6 9.Bb2 a5 10.b5; 6.g3 0-0 7.Be2 Nd5 8.Bb2 Nb4 9.Ne4 Bb2 10.Rb2) 6...0-0 7.0-0 Na6 8.Ba3 Bd7 9.b5 cb5 10.Bb5; D) 5...a5 6.b5 0-0 7.Ba3 cb5 8.Rb5 d6 9.Bd3 Nc6 10.0-0; E) 5...0-0 6.Bd3 (6.Be2 d5 7.Ba3 Qd6 8.0-0 Nbd7 9.Rb3 b5 10.h3) 6...d6 7.Bb2 Nbd7 8.0-0 a5 9.b5 cb5 10.Bb5.

5.Bb2 A) 5...0-0 6.Rb1 (6.Bd3 Na6 7.a3 d5 8.0-0 Qd6 9.Na4 Ne4 10.Bg7; 6.b5 cb5 7.Nb5 Na6 8.Bd3 Nc5 9.0-0 d6 10.Qe2; 6.Be2 d5 7.a3 Qd6 8.h3 Nbd7 9.0-0 a5 10.b5; 6.Qc1 d5 7.Be2 Qd6 8.0-0 Nbd7 9.Rb1 a5 10.b5; 6.a3 d5 7.Bd3 Qd6 8.0-0 Nbd7 9.e4 d4 10.Ne2; 6.h3 d5 7.Be2 Qd6 8.0-0 Nbd7 9.Rb1 Nb6 10.b5; 6.h4 d5 7.a3 Qd6 8.Be2 Nbd7 9.Ng5 Nb6 10.0-0; 6.g3 Na6 7.a3 d5 8.Bg2 Ne4 9.0-0 Bg4 10.h3; 6.Bc4 Na6 7.a3 d5 8.Bd3 c5 9.b5 Nc7 10.0-0) 6...Na6 7.a3 d5 8.Be2 Qd6 9.0-0 Bd7 10.d4; B) 5...Na6 6.a3 (6.Ba6 ba6 7.Ne4 0-0 8.Nf6 ef6 9.0-0 Qe7 10.Bc3; 6.Ba3 0-0 7.Rb1 Nc7 8.Bd3 Ncd5 9.Nd5 cd5 10.0-0; 6.b5 Nc5 7.Be2 0-0 8.0-0 cb5 9.Bb5 a6 10.Be2) 6...0-0 7.Bd3 d5 8.0-0 Qd6 9.Na4 Ne4 10.Bg7; C) 5...Qb6 6.a3 (6.Rb1 0-0 7.Bd3 Qb4 8.Nb5 Qa5 9.Bc3 Qd8 10.Na3; 6.Bd3 Qb4 7.a3 Qa5 8.0-0 0-0 9.Nd4 Na6 10.h3; 6.b5 0-0 7.Bd3 cb5 8.Nb5 Nc6 9.Rb1 Nb4 10.Bd4) 6...0-0 7.Bd3 Na6 8.0-0 d6 9.h3 Bd7 10.Na4; D) 5...d6 6.Bd3 (6.a3 0-0 7.Bc4 d5 8.Bb3 Na6 9.0-0 c5 10.b5; 6.Bc4 0-0 7.0-0 d5 8.Bd3 Qd6 9.a3 Nbd7 10.e4) 6...0-0 7.a3 a5 8.0-0 Na6 9.Ne4 Ne4 10.Bg7; E) 5...Qc7 6.g4 (6.Bd3 0-0 7.0-0 d5 8.Qe2 Na6 9.a3 e5 10.e4; 6.a3 0-0 7.Bd3 d5 8.0-0 e5 9.e4 d4 10.Na4; 6.h3 0-0 7.Bd3 d5 8.0-0 e5 9.Be2 Na6 10.b5; 6.h4 Na6 7.Ba6 ba6 8.Ne4 Rb8 9.Nf6 Bf6 10.Bf6 ; 6.Be2 Na6 7.a3 0-0 8.h3 d5 9.0-0 Ne4 10.d4) 6...Na6 7.g5 Nh5 8.Ba6 ba6 9.Rb1 d5 10.Na4; F) 5...Nd5 6.e4 (6.Ng5 h6 7.Nge4 Nb4 8.Rb1 0-0 9.Na4 Qa5 10.Bg7; 6.Bc4 0-0 7.0-0 Nb4 8.a3 d5 9.ab4 dc4 10.Qe2; 6.Rb1 Nc3 7.Bc3 Bc3 8.dc3 0-0 9.Bd3 a5 10.b5; 6.Nd5 Bb2 7.Rb1 Bg7 8.Nc3 0-0 9.Bd3 d5 10.0-0; 6.a3 0-0 7.Be2 Na6 8.0-0 Nac7 9.h4 d6 10.h5; 6.Be2 0-0 7.a3 Na6 8.h4 Nc3 9.Bc3 Bc3 10.dc3; 6.Nd4 0-0 7.b5 e5 8.Nf3 d6 9.Nd5 cd5 10.c4; 6.Qb1 Nc3 7.Bc3 Bc3 8.dc3 d5 9.Bd3 Bg4 10.Ne5; 6.Qc1 Nc3 7.Bc3 Bc3 8.dc3 d5 9.Bd3 Qd6 10.Qb2) 6...Nb4 7.a3 N4a6 8.Bc4 Nc5 9.d4 Ne4 10.Bf7; G) 5...a5 6.b5 (6.a3 0-0 7.Bd3 d6 8.Ne4 Ne4 9.Bg7 Nf2 10.Kf2) 6...0-0 7.Bd3 cb5 8.Nb5 Na6 9.0-0 Nc5 10.a4; H) 5...d5= 6.Bd3 (6.a3 0-0 7.Bd3 Qd6 8.0-0 Nbd7 9.e4 d4 10.Ne2; 6.h3 0-0 7.Bd3 Qd6 8.a3 e5 9.Be2 Nbd7 10.0-0) 6...Qd6 7.0-0 0-0 8.a3 Nbd7 9.Qe2 e5 10.e4.

5.Bc4 A) 5...0-0 6.Bb2 (6.a3 d5 7.Bd3 Bg4 8.h3 Bf3 9.Qf3 Nbd7 10.Bb2; 6.0-0 a5 7.b5 d5 8.Bd3 cb5 9.Nb5 Ne4 10.Nfd4; 6.Ba3 d5 7.Bd3 Qd6 8.Rb1 e5 9.e4 d4 10.Na4; 6.Rb1 d5 7.Bd3 Bg4 8.h3 Bf3 9.gf3 Nbd7 10.Ba3) 6...d5 7.Bd3 Qd6 8.a3 e5 9.e4 d4 10.Ne2; B) 5...d5 6.Be2 (6.Bd3 a5 7.b5 cb5 8.Nb5 Ne4 9.Nfd4 Nc6 10.Bb2; 6.Bb3 a5 7.ba5 Qa5 8.0-0 0-0 9.Bb2 Nbd7 10.d4) 6...a5 7.b5 cb5 8.Bb5 Nc6 9.0-0 0-0 10.Bb2.

5.Bd3 A) 5...0-0 6.Bb2 (6.a3 d6 7.Bb2 Nbd7 8.0-0 Ne5 9.Ne5 de5 10.Qe1) 6...d6 7.0-0 Nbd7 8.Qe1 Ng4 9.Qe2 Nde5 10.Rab1; B) 5...Nd5 6.0-0 (6.Nd4 Nb4 7.Ba3 c5 8.Bb4 cb4 9.Nce2 e5 10.Nb3; 6.Bb2 Nb4 7.Qb1 0-0 8.Be2 d5 9.a3 N4a6 10.h4; 6.Rb1 Bc3 7.e4 Bb4 8.ed5 Qa5 9.Bb2 0-0 10.a3; 6.h3 Nc3 7.dc3 Bc3 8.Bd2 Ba1 9.Qa1 0-0 10.e4; 6.Nd5 Ba1 7.Ba3 Bg7 8.Nf4 0-0 9.0-0 d5 10.e4) 6...Nb4 7.Bc4 d5 8.Bb3 0-0 9.Bb2 Nd7 10.a3.

5.Be2 0-0 6.Bb2= (6.a3 d5 7.0-0 Qd6 8.Bb2 Nbd7 9.d4 Nb6 10.Ne5; 6.Rb1 Na6 7.Ba3 d5 8.b5 cb5 9.Rb5 Nc7 10.Rb3; 6.0-0 a5 7.Rb1 ab4 8.Rb4 Na6 9.Rh4 d6 10.h3; 6.Ba3 Nd5 7.Nd4 Nc3 8.dc3 d5 9.0-0 Nd7 10.b5) 6...d5 (6...Na6 7.a3 d5 8.0-0 Qd6 9.h3 Bd7 10.d4) 7.0-0 (7.d4 Bg4= (7...Qd6 8.0-0 Qb4 9.Rb1 Na6 10.Ne5) 8.h3 Be6 9.0-0 Qd6 10.b5) 7...Qd6 8.Rb1 (8.b5 a6 (8...Nbd7 9.bc6 bc6 10.d4) 9.a4 b6= (9...c5 10.Ng5) 10.Bd3; 8.a3 Nbd7 9.Bd3 a5 10.e4) 8...e5+= (8...Na6 9.Na4 Qb4 10.Bf6) 9.d4 (9.a3!?+= Nbd7 10.Ng5; 9.h3 Nbd7 10.b5) 9...e4–/+ 10.Nd2 (10.Ne5 Qb4 11.f3 ef3 12.Bf3 Re8–/+) 10...Re8 (10...Qb4!? 11.Re1 Nbd7–/+) 11.b5+= a6 12.b6 Qb4 13.Ba1 Qa5 14.Qc1 Bf8 15.h3 Bd6 (15...Nbd7 16.Qb2=) 16.Nd1 (16.f3 ef3 17.Rf3 Nfd7=) 16...Bb4 17.c3 Bf8 18.c4 dc4 (18...Qa2 19.c5 Nfd7 20.Bb2 Nb6 21.Nc3 (21.cb6?! Qa4+/–) 21...Qb1 22.Qb1+–) 19.d5 (19.Nc3 Qg5 20.Kh2 Qh4 21.Nc4 Be6=) 19...Nd5+= 20.Nc4 Qc5 (20...Qa2? 21.Nc3 Nc3 22.Qc3+–) 21.Qb2 f6 22.Nc3 Nd7 (22...Nc3 23.Qc3 Be7 24.Rfd1+=) 23.Rfd1 Bg7 24.Qb3 Re6 25.Bb2 Qb4 (25...Nc3 26.Bc3 Qe7 27.Rd2=) 26.Qc2 (26.Nd5 Qb3 27.Nf6 Nf6 28.ab3 Nd5+=) 26...Nc3 (26...N7b6 27.Nd5 (worse is 27.Ne4 Qa4 28.Qa4 Na4–/+) 27...cd5 28.Nb6 Qb6 29.Rd5=) 27.Bc3 Qe7 28.Na5 Kh8 29.Rd2 h6 30.Qd1 (30.Bc4 Rd6 31.Rd6 Qd6 32.Qe4 Ne5 33.Be5 fe5+=) 30...c5 (30...Ne5 31.Nc4 Nf7 32.Qc2+=) 31.Nc4 (31.Nb7 Bf8 32.Na5 Nb6+/– (32...Rb6? 33.Rb6 Nb6 34.Rb2+–)) 31...Rc6 32.h4 (32.Na5 Re6= (32...Rb6? 33.Rd7 Rb1 34.Re7 Rd1 35.Bd1+–)) 32...h5 (32...Rb8 33.Rd6 Rd6 34.Qd6 Qd6 35.Nd6+=) 33.Rd6= Rd6 34.Nd6 Bf8 35.Nc8 Rc8 36.Qd5 Rb8 37.Rd1 Nb6 38.Qg5 Kg7 (38...Qf7 39.Bf6 Kh7 40.Bd8+=) 39.Bh5+= Qf7 40.Qf4 (40.Bg4 Be7 41.Bf5 Rh8 42.Be4 Rh6+=) 40...Re8 41.Be2 Na4 42.Ba1 b5 43.h5 1–0. Raap,Christian (2285) – Trokenheim,Marek (2175), remoteschach.de, 2010.

5.Be2 a5 6.b5 (6.Rb1 ab4 7.Rb4 Na6 8.Ra4 b5 9.Rf4 b4 10.Ne4) 6...cb5 7.Bb5 Nc6 8.0-0 0-0 9.Ba3 d5 10.Rb1.

5.Be2 Na6 6.Ba3 (6.a3 0-0 7.0-0 d6 8.Bb2 Bd7 9.h3 c5 10.b5; 6.Rb1 0-0 7.0-0 d5 8.b5 cb5 9.Rb5 Qd6 10.Bb2) 6...0-0 7.0-0 d6 8.Bd3 Nd5 9.Nd5 Ba1 10.Ne7.

5.Be2 Qb6 6.0-0 (6.a3 0-0 7.Bb2 d6 8.0-0 Na6 9.d4 Bd7 10.Qd2; 6.Rb1 0-0 7.0-0 Na6 8.b5 Nc5 9.Ba3 Nfe4 10.Ne4; 6.Ba3 Nd5 7.Na4 Qc7 8.Rb1 0-0 9.0-0 d6 10.c4) 6...0-0 7.Rb1 Na6 8.Ba3 d6 9.b5 Nc5 10.bc6.

5.Be2 d5 6.Nd4 (6.0-0 0-0 7.Rb1 Qd6 8.h3 Nbd7 9.d4 Nb6 10.Ne5; 6.h3 0-0 7.0-0 Qd6 8.Bb2 Nbd7 9.a4 Nb6 10.b5; 6.Rb1 0-0 7.0-0 Qd6 8.Ng5 Bd7 9.b5 h6 10.Nf3; 6.Ng5 0-0 7.0-0 a5 8.b5 cb5 9.Bb5 Nc6 10.a4; 6.Ba3 Qd6 7.Qc1 0-0 8.b5 c5 9.0-0 Ne4 10.Bb2; 6.Bb2 Qd6 7.0-0 0-0 8.b5 Nbd7 9.bc6 bc6 10.d4; 6.Bd3 0-0 7.0-0 Qd6 8.Rb1 Na6 9.Ba3 Bd7 10.h3; 6.g3 0-0 7.0-0 Qd6 8.Re1 Bg4 9.Bb2 Nbd7 10.Rb1; 6.a3 Qd6 7.0-0 0-0 8.Nd4 e5 9.Nb3 Nbd7 10.Bb2; 6.a4 0-0 7.Ba3 Ne4 8.Bb2 Na6 9.Rb1 Nd6 10.b5) 6...e5 7.Nf3 Qe7 8.0-0 0-0 9.Rb1 Rd8 10.h3.

5.Be2 Nd5 6.Bb2+= (6.Nd4 0-0 7.0-0 Nb4 8.a3 Nd5 9.Bb2 Nc3 10.Bc3; 6.Rb1 Nc3 7.dc3 Bc3 8.Bd2 Bf6 9.e4 d6 10.0-0; 6.0-0 Nc3 7.dc3 Bc3 8.Rb1 a5 9.Bb2 ab4 10.Bc3) 6...Nb4 7.Qb1 0-0 8.0-0 N8a6 9.a3 Bc3 10.Bc3.

5.Be2 d6 6.0-0 (6.Bb2 0-0 7.0-0 Na6 8.a3 Bd7 9.h3 c5 10.b5; 6.Rb1 0-0 7.0-0 Na6 8.Ba3 Nc7 9.Bd3 Ncd5 10.Nd5; 6.a3 0-0 7.Rb1 a5 8.b5 cb5 9.Rb5 b6 10.0-0; 6.Ng5 0-0 7.0-0 Nbd7 8.Rb1 h6 9.Nf3 a5 10.b5; 6.h3 0-0 7.0-0 Na6 8.a3 Bd7 9.Bb2 c5 10.b5; 6.h4 a5 7.b5 cb5 8.Nb5 Nc6 9.Bb2 0-0 10.a4; 6.Ba3 0-0 7.0-0 Nd5 8.Nd4 e5 9.Nf3 Nd7 10.b5; 6.a4 Nd5 7.Rb1 Nc3 8.dc3 Bc3 9.Bd2 Bf6 10.0-0) 6...0-0 7.a3 a5 8.Bb2 Na6 9.b5 Nc5 10.d4.