3.a3 Qd6 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e6).

3.a3 Be7?? 4.Bg7 Bf6 5.Bh8 Bh8 6.d4 Ne7 (6...e5 7.e3+-) 7.Nf3 (7...Ng6 8.e3+-) 1–0. composite – topalov2700 Kid, ChessWorld.net, 2008.

3.a3 Ne7 4.Nf3 (4.e3 a5=) 4...Nf5 (4...f6 5.e3=) 5.e3 Be7 (5...a5 6.b5=) 6.g4 (6.Bd3 0-0=) 6...Nh6? (better is 6...Bf6 7.Bf6 Qf6=) 7.Bg7+- (7.Bg7 Bf6 8.Bh8 Bh8 9.d4 Ng4 10.Rg1+-) 1–0. Wall,Bill – Elikkile, internet, 2003.

3.a3 f6 (--> 1.b4 e6 2.Bb2 f6 3.a3 d5).

3.a3 Qg5 4.Nf3 Qd8 5.e3 Nc6 6.Be2 Bd7 (6...Bd7 7.Nc3 Nf6+=; 6...Nf6 7.b5 Na5 8.Bc3+=). marcosr – islanderfan (1640), net–chess.com, 2005.

3.Ba3 Nf6 4.Nc3 (4.Nf3 Bd6+=) 4...Bd6 (4...a5 5.Bb2 ab4 6.Nb5-+) 5.e3 Nc6 6.Bb5 Bd7 7.Nf3 a6 (7...a5 8.Bb2 ab4 9.Ne2-+) 8.Bd3 Qe7 9.0-0 0-0-0 10.Na4 (10.Rb1 e5 11.e4 Bb4 12.Bb4 Nb4 13.Nd5 Nfd5 14.ed5 e4= (worse is 14...Na2 15.c3+/–)) 10...h6 (10...e5 11.b5 Ba3 12.bc6 Bc6 13.Bf5 Nd7 14.Nc3-+) 11.c4 dc4 12.Bc4 Kb8 (12...b5 13.Be2 ba4 14.Qa4 Nb4 15.Ba6 Kb8 16.Qa5+=) 13.Rb1 (13.Nc5 Nb4 14.Bb4 Bc5 15.Bc5 Qc5=) 13...g5 (13...b5 14.Be2 ba4 15.b5-/+) 14.Qb3 (better is 14.b5!? Ba3 15.bc6 Bc6 16.Ba6=) 14...g4-/+ 15.Nd4 White prepares b5 15...h5?? (better is 15...Nd4 16.ed4 b5-+) 16.b5 (better is 16.Nc6 Bc6 17.b5 ab5 18.Bb5+=) 16...ab5?? (16...Nd4 17.Bd6 Qd6 18.ed4 ab5 19.Bb5=) 17.Bb5?? (17.Bd6 Nd4 18.Be7 (18.ed4?! Qd6 19.Bb5 Bc8=) 18...Nb3 19.Bf6 (19.Rb3?! bc4 20.Rb2 Ne4 21.Bd8 Rd8=; 19.Bb3?! ba4 20.Bf6 ab3+-; 19.ab3?! Ne4 20.Bd3 Nd2+/–) 19...Nd2 20.Bh8 (20.Bd8?! Rd8 21.Nc5 Nb1 22.Rb1 bc4 23.Nb7 Rf8=) 20...bc4 21.Bf6+-) 17...h4?? (17...Nd4 18.ed4 Ba3 19.Bd7 Qb4+/–) 18.Bc6+- g3 (18...Bb4 19.Bb4 Qe8+-) 19.Qb7 1–0. RisingFast – pieeater, ChessWorld.net, 2013.

3.Na3 Bb4?? 4.Bg7 Ba3 5.Rb1 Nf6 6.Bh8 Bd7 7.e3 (7.Rb7 Nc6+-) 7...Nc6 (7...b6 8.Qf3 Ne4 9.d3+-) 8.Rb3 (8.Rb7 Ne4+-) 8...Bd6 9.Qf3 (better 9.Rb7 Ne4 10.Rb1+-) 9...Qe7?? (better 9...Ne4+-) 10.Bf6+- Qf8 11.Rb7 Ne5 (11...Qh6 12.Bc3+-) 12.Be5 (12.Qh5 Bc6 13.Bb5 Bb5 14.Rb5 a6+-) 12...Be5 13.Bb5 (13.Qh5 Qg7+-) 13...c6 14.Ba4 (14.Bd3 Rb8 15.Rb8 Bb8+-) 14...Qa3 (14...0-0-0 15.Rb1 Qa3 16.Bb3+-) 15.Qg4 Qc1 (15...0-0-0 16.Rb3 f5 17.Qh4+-) 16.Ke2 Qa3 (16...0-0-0 17.Ra7 Bb8+-) 17.Qg8 Qf8 18.Qf8 Kf8 19.Rd7 1–0. invictus31 – Ottoman7 (1615), lichess.org, 2021.

3.a4 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.a4 e6).

3.b5 Bb4?? 4.Bg7 Bd2 5.Qd2 Nf6 6.Bh8 Bd7 7.e3 Bb5 8.Bb5 c6 9.Bd3 Ne4 10.Be4 de4 11.Qd8 Kd8 12.Nc3 (12.Bf6 Kc7 13.Nc3 Nd7 14.Ne4 Rg8+-) 12...Nd7 13.Ne4 Kc7 14.Bb2 Nc5 1-0. upep (1670) – harastey, Rated Classical game, lichess.org, 2013.

3.b5 Bd6 4.Bg7 Nf6 (4...Be5 5.Be5 Nf6 6.Nf3+-) 5.Bh8 Be5 (5...Nbd7 6.Nf3+-) 6.Bf6 (6.Nc3!? Nbd7+-) 6...Qf6 7.c3 Nd7 8.d4 Bf4 9.e3 Bh6 (9...Bd6 10.c4+-) 10.Qd3 e5 11.Qh7 ed4 (11...Bf8 12.Nd2+-) 12.cd4 Nf8 13.Nf3 (better is 13.Qc2!? Bf5 14.Qb3 0-0-0+-) 13...Bf5?? (13...Nh7 14.Nc3-+) 14.Nc3 (better is 14.Qg8 Bg7 15.Nc3+-) 14...Bh7-+ 15.Nd5 Qd6 16.Bc4 (16.Nc3 Qb4 17.Rc1-+) 16...Be4 17.Nc7 (17.Nc3 Bf3 18.Bf7 Kf7 19.gf3 Ne6-+) 17...Qc7 18.Rc1 Qa5 19.Ke2 Bf3 (better is 19...a6!? 20.Ne5 Ne6 21.Rhd1 Bg2 22.ba6 ba6 23.h4-+) 20.gf3 (20.Kf3 Nd7-+) 20...Ne6 (better is 20...Nd7-+) 21.Rhg1 (21.Rc2 Rd8 22.Rb1 Qb6-+) 21...Qb4 (better is 21...Nd4 22.Kf1 Ke7 23.Kg2 Rg8 24.Kh3 Rg1 25.Rg1 Nf3 26.Rg3-+) 22.Rg8 Bf8 23.Kf1 (23.Bd3 Rd8-+) 23...Qb2 (better is 23...Rc8 24.Kg2 Rc4 25.Rc4 Qc4-+) 24.Rd1 Qc3 (24...Qc2 25.Bb3 Qf5 26.a4-+) 25.Bb3 (25.Bd3 Rd8-+) 25...Rc8 (better is 25...Qb4 26.Kg2-+) 26.d5 (26.Kg2-+) 26...Nc5 27.d6 Nd7 (better is 27...Kd7 28.Rg5 Nb3 29.ab3 Qb3 30.Rgd5-+) 28.Rg4 (28.b6 ab6 29.f4 b5-+) 28...Ne5 (28...Qh8 29.Re4 Kd8 30.Bf7-+) 29.Re4 (29.Ra4-+) 29...f6 (better is 29...Kd7-+) 30.d7+- Kd8? (better is 30...Ke7 31.dc8R Qc8+-) 31.f4 (better is 31.dc8R Kc8 32.f4+-) 31...Rc7 (31...Nd7!? 32.Red4 Rc7 33.Be6-+) 32.fe5-/+ fe5 (better is 32...f5 33.Red4 Bg7-+) 33.Be6?? (33.b6 Rd7 34.Rd7 Kd7 35.ba7-/+) 33...a6 (better is 33...Qc2 34.Red4 ed4 35.Rd4 Qb1 36.Kg2 Qb5-+) 34.ba6 ba6 35.Rg4 Qc5 (35...Qc2 36.Rd5 Rb7 37.Re5-+) 36.Rb1 Rd7 37.Rb8? (better is 37.Bd7!? Qc2 38.Rb8 Kd7 39.Kg2-/+) 37...Kc7-+ 38.Rgb4?? (38.Rb1 Qa3 39.Kg2 Rg7 40.Rg7 Bg7-+) 38...Rd1 (better is 38...Qc1 39.Kg2 Bb4 40.Bd7 Kb8-+) 39.Kg2 Qc6 40.Kg3 (40.e4 Bb4 41.Rc8 Kb7 42.Rc6 Kc6 43.h4-+) 40...Rg1 (40...Qe6 41.R4b7 Kd6 42.Rb6 Kd7 43.Re6 Rg1 44.Kf3 Ke6 45.Rf8+/–) 41.Kh4 Be7 (41...Qe6 42.R4b7 Kd6 43.Rb6 Ke7 44.Re6 Ke6 45.Rf8+/–) 42.Kh5 Qf3 43.Kh6 Bg5 44.Kg7 Be7 45.Kh6 Bb4 46.Rb4 Qf6 47.Kh5 Qh8 0–1. MasterofDisaster – pacificink, Live Game Caissa's Web, 2004.

3.b5 h6 4.e3 Nf6 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 dc4 9.Bc4 Bd7 (9...a6 10.a4=) 10.a4 Bd6 11.Nc3 b6 (11...e5 12.d3+=) 12.Qc2 a5 (12...a6 13.Ne4 Ne4 14.Qe4 ab5 A) 15.Qa8?! Bc6 (worse 15...bc4 16.Qe4+-) 16.Qa7 bc4=; B) 15.ab5 Ra1 16.Ra1+-) 13.Ne4+- Be8 (13...Ne4!? 14.Qe4 Ra7+-) 14.Nf6 gf6 15.Qe4 Nd7 16.Be6! fe6 (16...fe6 17.Qe6 Double attack) 17.Qe6 Bf7 18.Qd6 Kg7 (18...Rc8 19.Qf4 Kg7 20.d3+-) 19.Nh4 1–0. DEFFM – Frele, freechess.org, 2018.

3.c3 a6 4.Nf3= Nf6 5.d4 (5.e3 Bd6=+) 5...Nbd7 (5...Bd6 6.Ne5=+) 6.e3 Bd6 7.Be2 0-0 8.0-0 b6 9.Qc2 Bb7 10.Nbd2 Re8 11.a3 e5 (11...c5 12.dc5 bc5 13.Rfd1=) 12.de5 ½–½. Woschkat,Karl_Heinz – Erler,Ekkehard, CiF FT–95–0038A, 1995.

3.c3 Na6 4.e3 Nf6 5.Nf3 Bd6 6.Ba3 (6.Na3 0-0=) 6...0-0 (6...Nb8 7.b5=) 7.Qc2 (7.d4 c6=) 7...g6 (7...Nb8 8.d4+=) 8.b5= Nc5 (8...Ba3 9.Na3 Nb8 10.c4=) 9.c4 Nfe4? (better is 9...dc4 10.Bc4 a6+=) 10.Bd3?? (better is 10.cd5 Qf6 11.d4 ed5 12.dc5 (worse is 12.Bc5 Bc5 13.Bd3 Bb4 14.Ke2 Qe7+=) 12...Qa1 13.cd6 Nd6 14.Bd3+-) 10...Qf6 (10...Nd3 11.Qd3 Qf6 12.Bd6 Nd6+= (worse is 12...Qa1 13.Bf8 Kf8 14.Qc2+=; 12...cd6?! 13.Nc3=)) 11.Bb2?? (better is 11.Bc5 Nc5 12.Nc3+=) 11...Be5 (better is 11...Nd3 12.Qd3 Qb2 13.cd5 f5 14.de6 Qc1 15.Ke2 Qh1-+) 12.Be5+- (12.Ne5?! Qf2 13.Kd1 Qg2+=) 12...Qf5 (12...Qe7 13.Be2+-) 13.Bc7 Nd3 14.Qd3 Nc5 (14...Bd7 15.Bf4+-) 15.Qf5 ef5 (15...gf5 16.cd5 Bd7 17.Nc3+-) 16.cd5 Nd3 (16...Bd7 17.Nc3+-) 17.Ke2 Nc5 (17...Nb4 18.Nc3+-) 18.Bd6 Nd7 (18...b6 19.Bf8 Kf8 20.Nc3+-) 19.Bf8 Kf8 20.Nc3 Nb6 21.d3 f6 (21...f4 22.e4+-) 22.Rhc1 Nd7 (22...Ke7 23.a4+-) 23.a4 b6 24.e4 (24.a5 a6+-) 24...fe4 25.de4 Nc5 26.a5 (26.Nd4 Bd7+-) 26...ba5 (26...Nb3 27.ab6 Nc1 28.Ke3+-) 27.Nd4 Bd7 (27...Nb7 28.Nc6+-) 28.Ra5 Re8 (28...a6 29.f4+-) 29.f3 f5 (29...Ke7 30.Ra7 f5 31.e5+-) 30.Ra7 (30.Nd1 Ne4 31.fe4 Re4 32.Kd3 Re5+-) 30...fe4 31.fe4 Bg4 (31...Bf5 32.Nf5 gf5 33.Rh7+-) 32.Ke3 Kg8 33.b6 (better is 33.Rc7!? Nd7 34.h3 Ne5 35.hg4 Ng4 36.Kf4 Ne5+-) 33...Rb8 34.Rb1 Nb7 35.Nc6 Nc5 36.Nb8 1–0. stefankluin – cityelec, net–chess.com, 2003. (=1.c3 d5 2.b4 e6 3.Bb2 Na6)

3.c3 e5 4.Nf3 Bd6 5.c4 dc4 6.Ne5 = (6.Be5 Be5 7.Ne5 Qf6-/+).

3.c3 Be7 4.e3 Nf6 5.h3 a6 6.a4 Bd7 7.Qb3 0-0 8.d3 b5 9.a5 (9.ab5!? Bb5 10.c4=) 9...c5-/+ 10.Nf3 c4 11.dc4 dc4 12.Qd1 Bc6 13.Qd8 Rd8 14.Be2 Ne4 15.0-0 Bf6 16.Nd4 Bd5 17.Bc1 Nc6 18.Nc6 Bc6 19.Bf3? (19.Bb2 Nd2 20.Rd1 Nb3-+) 19...Bd5 (better 19...Nc3!? 20.Bc6 Ne2 21.Kh1 Nc1 22.Ba8 Ra8 23.Rc1 Ba1-+) 20.Ra3-/+ Rd6 21.Bb2 Rad8 22.Ra1 h6 23.Be4 (23.Rd1!?-/+) 23...Be4-+ 24.Na3 (24.f3 Bb1 25.Rab1 Rd3-+) 24...Bd3 (24...Rd2!? 25.Bc1 Rd1 26.Bb2 Rf1 27.Rf1-+) 25.Rfe1 Rd5 26.e4 Re5 27.f3 Bg5 (better 27...Bh4 28.Red1 f5-+) 28.Bc1=+ f5 (28...Bh4!? 29.Bf4 Be1 30.Be5 Bh4=+) 29.Bg5= hg5 30.ef5 Re1 31.Re1 ef5 32.Re6 Ra8 33.Rg6 g4 34.hg4 fg4 35.Rg4 Re8 36.Rd4 Re1 37.Kf2 Re2 (37...Rc1 38.Rd8 Kh7 39.Nb5 ab5 40.a6=+) 38.Kg3= Ra2 39.Nb5 ab5 40.Rd5 Rc2 (40...Ra3!? 41.Rb5 Kf7= (worse 41...Rc3 42.a6 Kh7 43.a7+-)) 41.Rb5+= Rc3 (41...Ra2!?+=) 42.a6+/- Ra3?? (better 42...Kh7 43.a7 Be4+/-) 43.Rb6 (better 43.Ra5 Rb3 44.Kf4 Rb4 45.a7+-) 43...c3-+ 44.Rc6 c2 (44...Ba6?! 45.Kf4-+) 45.b5 Ra1 (45...Ra2 46.Kf4 Bb5 47.Rc8 Kh7 48.Ke3 Ba6 49.Rc5-+) 46.b6? (46.Kf4-+) 46...c1Q (better 46...Ra6 47.Rc8 Kf7-+) 47.Rc1+- Rc1 (47...Ra6 48.b7 Rb6 49.Rc8 Kf7 50.b8Q Rb8 51.Rb8+-) 48.b7 (48.a7 Kh7 49.a8Q Rb1+-) 48...Rb1?? (48...Ba6 49.b8Q Rc8+-) 49.a7 Rb7 50.a8Q (50.a8Q Rb8 51.Qb8 Kh7 52.Qb3+-) 1-0. cortland (1685) - hoth_and_guderian, Rated Classical game, lichess.org, 2013. (=1.c3 d5 2.b4 e6 3.Bb2)

3.c3 f5 4.d4 Nf6 5.Nd2 Bd6 6.e3 Nbd7 7.f4 c6 8.Ngf3 0-0 9.a3 Ne4 10.Bd3 Ndf6 11.Qc2 Ng4 12.Nf1 Ngf2 13.Rg1 Nd3 14.Qd3 Bd7 15.N1d2 b6 16.c4 Rc8 17.c5 Be7 18.Ne5 Bf6 19.g3 Be5 20.fe5 Qg5 21.Ne4 fe4 22.Qe2 Rf3 23.Bc1 Rcf8 24.Bd2 Qh5 25.0-0-0 b5 26.Kc2 Be8 27.Rdf1 a6 28.g4 Qh3 29.Rf3 ef3 30.Qf2 Bg6 31.Kc3 Be4 32.Rg3 Qh6 33.g5 Qg6 34.h4 Bc2 35.Rf3 Qd3 36.Kb2 Qb3 0-1. Wieczoorxd (2500) - clubamigos (2455), Rated Bullet game, lichess.org.

3.c3 f6 4.e3 (--> 3.e3 f6 4.c3).

3.Nc3 a6 4.d4 (4.e3 Nf6 5.a3 Bd6+=) 4...g6 (4...Bb4 5.g3-/+) 5.e4 c6 (5...de4 6.Ne4 Bb4 7.c3=) 6.Nf3 Nd7 7.ed5 cd5 8.a3 Bg7 9.Be2 h6 10.0-0 Ne7 11.h3 b5 (better is 11...0-0!?=) 12.Re1 Bb7 13.Bd3 (13.a4 ba4 14.Na4 0-0+/–) 13...Nb6 14.Ne2 (better is 14.a4!? Nc4 15.Qc1+=) 14...0-0+= 15.c3 Nc6 16.Qc2 a5 (16...Nc4 17.a4=) 17.Nf4 (better is 17.Bb5!? Nc4 18.Nf4+/–) 17...ab4 18.ab4 Nd7?? (better is 18...Qd6 19.Ne2 Nc4+=) 19.Ra8+/– Ba8 20.Bb5 (20.Qe2 Qf6 21.Bc1 Na7+/–) 20...Ne7? (better is 20...Qb8!? 21.Bc6 Bc6+/–) 21.Ra1 Nf6 22.c4?? (better is 22.Ne5+-) 22...dc4+= 23.Qc4 (23.Bc4!? Bf3 24.gf3=) 23...Bf3= 24.gf3 Ned5 25.Ne2 Qd6 Exerts pressure on the isolated pawn 26.Ra6 Qb8 27.Bc1 Rc8 28.Rc6 Rc6 29.Bc6 Nb4 30.Ba4 Nfd5 31.Bb3 Kh7 32.Ng3 (32.Kg2 h5+=) 32...Bf8 (better is 32...Nc6! 33.Qc6 Qb3-/+) 33.Ne4+= Qd8 34.Qe2 Nf4?? (better is 34...Bg7 35.Qc4 Qb6-/+) 35.Bf4+- g5 (35...Qd4 36.Qb5 Nd3 37.Be3 Qa1 38.Kg2 Ne1 39.Kg3+-) 36.Be3 (better is 36.Be5 Be7 37.Nc5+-) 36...Nc6 (36...Nd5 37.Qb5+-) 37.Qd1 (37.Qc2!? f5 38.Qc6 fe4 39.Qe6 Bg7+-) 37...Bg7 (37...Na5 38.Bc2 f5 39.Qd3+-) 38.Bc2 (better is 38.Qc2 f5 39.Qc6 fe4 40.Qe4 Kh8 41.Be6+-) 38...Kh8 39.f4 Nd4 (39...gf4 40.Bf4 Nd4 41.Nd6+-) 40.Qd3 (better is 40.fg5 hg5 41.Qh5 Kg8 42.Ng5 Qd7+-) 40...gf4 (40...f5 41.Nc5 Nf3 42.Kf1 Qa5 43.fg5 hg5+-) 41.Bd4 (better is 41.Nd6 Kg8 42.Bd4 Qg5 43.Kf1+-) 41...e5?? (better is 41...Qd4!? 42.Qb5 Be5+/–) 42.Ng5! hg5?? (42...Qg5 43.Kh2 Combination; 42...hg5 43.Qh7) 43.Qh7 1–0. ghorn (2345) – beammeupscotty (2120), net–chess.com, 2015.

3.Nc3 c5 4.Nf3 (better is 4.bc5!? Bc5 5.Nd5 Qd5 6.Bg7=) 4...cb4-/+ 5.Nb5 Nf6 6.d3 (6.Be5 Na6+=) 6...Nc6 7.c3 a6 8.Qc2?? (better is 8.Nbd4-/+) 8...ab5-+ 9.e4 bc3 10.Bc3 b4 11.0-0-0 (11.Bb2-+) 11...bc3 12.Qc3 d4 (12...Ra2 13.Kb1 Rf2 14.Qb3-+) 13.Nd4 (13.Qc4 Ra3 14.Qb5 Ra2-+) 13...Nd4 14.f3 Be7 (better is 14...Ra2 15.Kb1 Ra3 16.Qb2-+) 15.e5 Nh5 (15...Ba3 16.Kd2 Bb4 17.Qb4 Ra2 18.Ke1 Nc2 19.Kf2 Nb4 20.Rd2 Rd2 21.Ke3 Nfd5 22.Kd2 Qg5 23.f4 Qf4 24.Ke1 Nc3 25.d4 Nc2) 16.g4 Nf4 17.Rd2 0-0 18.h4 Ba3 19.Qa3 Ra3 20.h5 Qc7 21.Kd1 Qe5 (21...Rd3 22.Rhh2 Qc2 23.Ke1 Nf3 24.Kf2 Qd2 25.Be2 Qe1) 22.Rg1 (22.Bg2 Nf3! 23.d4 Qb5 24.Kc1 Rc3 25.Rc2 Ne2 26.Kd1 Qd3 27.Rd2 Qd2) 22...Nf3 23.Rf2 (23.Be2 Qa1 24.Kc2 Nd4) 23...Qa1 24.Kc2 Qa2 0–1. jmcauley (1800) – wmalone (2125), net–chess.com, 2013.

3.Nc3 c6 4.e3 Bb4 5.Qe2 Nf6 6.a3 (6.Nf3 Nbd7-/+) 6...Bc3 (6...Bd6 7.e4 d4 8.e5 dc3 9.Bc3-/+) 7.Bc3 Bd7 (7...0-0 8.Nf3-/+) 8.Nf3 (8.Rb1 b5+=) 8...Na6 (8...0-0 9.d3+=) 9.Bf6 (9.Rb1 b5+=) 9...Qf6 10.g3?? (better is 10.d4+=) 10...Qa1-+ 11.Qd1 Qa3 12.Ne5 f6 (12...Nc5 13.Bh3-+) 13.Nd7 (13.Qh5 Kd8 14.Nf7 Ke7 15.Nh8 Qc1 16.Qd1 Qd1 17.Kd1 Nc7-+) 13...Kd7 14.Bd3 (14.Be2 Qa4-+) 14...g5 (14...Nb4!? 15.Qb1-+) 15.0-0 (15.Ba6 Qa6 16.h4 g4-+) 15...h5 16.Be2 h4 17.gh4 (17.Ba6 Qa6 18.g4 Rhf8-+) 17...Rh4 18.Bh5 (18.Kg2 Rah8 19.Rh1 Qd6-+) 18...Rh8 (18...Qd6 19.f4 Rg8 20.Be2-+) 19.Bf3 Rh2 20.Bg4 (20.Bg2 Qe7 21.Re1 Qh7-+) 20...Rh1 (better is 20...Qd6!? 21.f4-+) 21.Kg2 R1h2 (better is 21...R8h2 22.Kf3 Rf1 23.Qf1-+) 22.Kg3?? (22.Kg1 f5 23.Bf3-+) 22...f5-+ 23.Be2 R8h3 0–1. ajeffries (1645) – sburritt, net–chess.com, 2006.

3.c4 Bb4?? 4.Bg7 dc4 5.Bh8 f6 (5...Nc6 6.e3 Nf6 7.Bc4+-) 6.e3 Qd5 7.Qg4 (better 7.Nc3 Bc3 8.dc3 Qd1 9.Rd1+-) 7...e5 (7...Nh6 8.Qf4 Nf7 9.Bf6+-) 8.Qh5 (better 8.Qc8 Ke7 9.a3+-) 8...Qf7 9.Qf7 (9.Be2 Be6 10.a3 Ba5+-) 9...Kf7 10.Bc4 Be6 11.Be6 Ke6 12.Nh3 (12.f4!? Nc6 13.fe5 Ne5+-) 12...Nc6 13.f4 Nge7 14.fe5 Ne5 (14...Rh8 15.ef6 Nd5 16.0-0 Nf6 17.Nc3+-) 15.Nf4 (15.Bg7 Rg8 16.Nf4 Kf7+-) 15...Kf7 16.Bf6! Kf6 17.0-0 Kg7 18.Ne6 Kh8 (18...Kg6 19.Nc3 Nc4 20.Rab1+-) 19.Nc3 (19.Nc7 Rc8 20.Ne6 h6+-) 19...Bc3 (19...Nc4 20.Rf7 Ne5 21.Rf4 (21.Nc7?! Rc8 22.Re7 Be7+-) 21...Bc3 22.dc3+-) 20.dc3 c5 (20...c6 21.e4+-) 21.Rf4 (21.Nc5 Rc8 22.Nb7 Rc3+-) 21...N7g6 (21...b6 22.Raf1 N7g6 23.Ra4+-) 22.Rf5 (22.Ra4!? b6+-) 22...Re8 23.Nc5 b6 24.Nb3 Nd3 (24...Rc8 25.Rc1+-) 25.Rf7 Re7 (25...a5 26.Rb7+-) 26.Re7 Ne7 27.Rf1 Nd5 (27...Kg7 28.Rd1 Ne5 29.e4+-) 28.Rf7 (better 28.Rf8 Kg7 29.Rd8 Nc3 30.Rd3 Na2 31.Rd7 Kf6 32.Ra7 Nc3+-) 28...Nc3 29.g3 (29.Ra7!? h5+-) 29...Na2 (29...a5 30.a3 Nb1 31.Rc7+-) 30.Ra7 Nc3 31.Nd4 b5 32.Rb7 b4 33.Kg2 Nd1 (33...Ne1 34.Kf2 Nd3 35.Kf3+-) 34.Kf3 Ne1 (34...Ne5 35.Ke4 Ng4+-) 35.Ke2 b3 (35...Ng2 36.Nf5 Nc3 37.Kf2+-) 36.Kd1 Nd3 37.Kd2 Nc5 38.Rb8 Kg7 39.Nb3 Ne4 40.Kd3 Nf2 41.Ke2 Ne4 (41...Ng4 42.Rb7 Kh6 43.h3+-) 42.Nd4 Nc3 (42...Ng5 43.Rb6 Kf7 44.Kd3+-) 43.Kf3 Nd5 (43...h5 44.e4 Kf6 45.Rb6 Ke7 46.Nf5 Kd8 47.e5+-) 44.Nf5 (better 44.g4 Kf6+-) 44...Kg6 45.e4 Nf6 46.h4 (46.Rb7 Ng8 47.Rg7 Kf6 48.Rg8 Ke6 49.Rg7 Kf6 50.g4 h6 51.Re7 Kg5 52.e5 h5 53.Rg7) 46...h5 47.Rb6 Kf7 48.Nd6 (48.Rb7 Kf8 49.Kf4 Kg8 50.e5 Ng4 51.e6 Kh8 52.Kg5 Ne5 53.e7 Nf7 54.Kg6 Ne5 55.Kh5 Kh7 56.e8Q Nd7 57.Rd7) 48...Kg7 49.Nf5 Kf7 50.Kf4 (50.Rb7 Kf8 51.Kf4 Kg8 52.e5 Ng4 53.e6 Nh2 54.Rg7 Kf8 55.Rf7 Kg8 56.Nh6 Kh8 57.e7 Nf3 58.e8Q) 50...Ng4 51.Kg5 Ne3 52.Ne3 Ke7 53.Kh5 (53.Kh5 Ke8 54.e5 Kf7 55.Nd5 Kg7 56.e6 Kh7 57.e7 Kg7 58.e8Q Kh7 59.Rb7; 53.e5 Kd7 54.e6 Kd8 55.Nd5 Kc8 56.Kh5 Kd8 57.Rb8) 1–0. GuestGQWV – GuestFCZS, freechess.org, 2017.

3.c4 c5 4.bc5 Nf6 5.d4 Nc6 6.cd5 (6.Nf3+=) 6...Qd5 (6...ed5!? 7.Nc3 b6+=) 7.e3 b6 8.Nc3 bc5?? (better 8...Qd8 9.Bb5 Bb7+/-) 9.Nd5+- (9.Nd5 Nd5 10.e4+-) 1-0. DEFFM – GuestCXQM, freechess.org, 2021.

3.c4 Bd7 4.cd5 ed5 5.Nf3 Nf6 (5...Bb4?? 6.Bg7 Nc6 7.Bh8+-) 6.a3 Be7 7.g3 0-0 8.Bg2 c6 9.0-0 Bg4 10.h3 Bf3 11.Bf3 Ne4 12.Nc3 f5 13.d3 Ng5 14.Bg2 Nd7 15.f4 Ne6 16.b5 (16.e4 de4 17.de4 a5+-) 16...g5 (16...Qb6 17.Kh2=+) 17.Qa4 (17.e3!?+=) 17...Qb6= 18.Kh1 gf4 (18...Ndc5!? 19.Qc2 d4=+) 19.bc6+= (worse 19.gf4 Ndc5 20.Qb4 d4=+) 19...bc6? (better 19...Ndc5 20.Nd5 Na4 21.Nb6 ab6 22.cb7 Ra5=+) 20.Nd5!+- cd5 21.Qd7 Qd6 (21...Bf6 22.Bf6 Rf6 23.Qd5+- (worse 23.Bd5 Rd8 24.Qe7 Rg6 25.Be6 Re6 26.Qg5 Kh8+-)) 22.Qd6 Bd6 23.Bd5 Rfe8 24.Ba8 Ra8 25.gf4 Bf4 (25...Nf4 26.Rg1 Ng6 27.Bd4+-) 26.Rg1 (26.Rf3!? Rb8 27.Rg1 Kf7+-) 26...Kf7 27.Rab1 Rb8 28.Bc3 Rb1 (28...Rb6 29.Rgf1 Kg6 30.Rb6 ab6 31.e4 fe4 32.de4+-) 29.Rb1 h5 (29...Kg6 30.Rb7+-) 30.Rb7 Kg6 31.Ra7 Nc5 (31...Bc1 32.Ra6 Kf7 33.Ra5+-) 32.Re7 Nb3 (32...Bd6 33.Re8 Na4 34.Re6 Kf7 35.Rf6 Ke7 36.Bd4+-) 33.a4 Nc1 (33...Bg5 34.Re6 Kf7 35.Re5+-) 34.a5 Bd6 (34...Na2 35.a6 Nc3 36.a7+-) 35.Re6 (35.Re6 Kf7 36.Rd6+-) 1–0. AvImd (1775) – aspero (1805), lichess.org, 2020.

3.c4 Nd7 4.e3 Ne7 (4...Ngf6!? 5.c5 a5=+) 5.Nf3= dc4 6.Bc4 Nb6 7.Be2 a6 (7...Ned5 8.a3+=) 8.0-0+- Nc6 9.a3 Bd6 (9...f6 10.Nc3+-) 10.Bg7 Rg8 11.Bb2 Nd5 (11...Qe7 12.Nc3+-) 12.b5 (better 12.Qc2 e5 13.Nc3 (worse 13.Qh7 Nf6 14.Qc2 Bh3+-) 13...Nc3 14.Bc3+- (14.Qc3?! e4 15.Ne1 Qg5+=)) 12...Ne5?? (12...ab5 13.Qc2 e5 14.Bb5+=) 13.Nc3 (better 13.Ne5!? Qg5 14.Ng4 h5+-) 13...Ng4? (better 13...Nf3 14.Bf3 Nc3 15.Bc3 Qh4+-) 14.Nd5 ed5 15.h3?? (15.ba6 Kf8+-) 15...Ne5?? (15...Nf6 16.Kh1 Bh3 17.gh3 Qd7=) 16.Ne5+- Be5 (16...Bh3 17.g3 Be5 18.Be5 Qe7+-) 17.Be5 Rg2 (17...ab5 18.Bb5 c6+-) 18.Kg2 Qg5 (18...Qh4 19.Bg4 h5 20.Bc8 Rc8 21.Bg3 Qe4 22.f3+-) 19.Bg3 Qf5 (19...ab5 20.Bb5 c6 21.Be2+-) 20.Bg4 Qe4 21.Bf3 Qf5 22.Bg4 Qe4 23.Qf3 Qd3 24.Bc8 Rc8 25.ba6 ba6 26.Qg4 (26.Qg4 Qe4 27.f3+-) 1–0. GuestGCPD – CHKUTMATE, freechess.org, 2017.

3.c4 f5 4.e3 Nf6 5.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3).

3.d3 Nc6 4.c3 Qf6 5.b5 Ne5 6.d4 Nc4 7.Qc2 Nh6 (7...Bd7 8.a4-/+) 8.Qb3 (8.e4 Qg6 9.Bc1 Nd6+=) 8...Bd6 9.Nf3 Ng4 10.Bc1 Bd7 11.h3 Nf2 (better is 11...Nh6!?=) 12.Kf2+/– Qg6 13.a4 Qg3 14.Kg1 h6 (14...e5!? 15.Ne5 Ne5 16.Qd5 c6+=) 15.e3+- Na5 16.Qd1 0-0-0 17.Nbd2 (17.Ba3 Bf8+-) 17...g5? (17...e5!? 18.Qe1 Qe1 19.Ne1 Be7+-) 18.Rb1 (18.Bd3 Bf8+-) 18...h5 Black prepares the advance g4 19.Nb3 (better is 19.Bd3!? Be7 20.c4 Nc4 21.Bc4+-) 19...Nb3+/– 20.Qb3 g4 21.Be2?? (better is 21.Ng5 Rdf8 22.hg4+/–) 21...gf3 22.Bf3 (22.Rh2 Qh2 23.Kf2 Qg2 24.Ke1 Qe2) 22...Rdg8 (22...Qe1) 23.a5?? (better is 23.Kf1-/+) 23...Qf3 (23...Qe1) 24.Rh2 (24.Rb2-+) 24...Bh2 0–1. Gregor123 – rikilatic, mySchach.de, 2004.

3.d3 d4 4.a3 g6 5.Nf3 Bg7 6.c4 h6 (6...Ne7 7.e3 Nf5 8.Qe2=) 7.Nbd2 (7.e3 e5+=) 7...Ne7 8.Nb3 Pawn d4, live or die! 8...e5 9.e3 0-0 (9...de3!? 10.Ne5 Nf5=) 10.ed4+/– ed4 11.Bd4 (worse is 11.Nfd4 a5-+; worse is 11.Nbd4 Nf5 12.Nf5 Bb2-/+) 11...Bd4 12.Nfd4 Re8 13.Be2 b6 (13...a5 14.ba5 Nec6 15.Nc6 Nc6 16.0-0+/–) 14.0-0 c5? (better is 14...a5 15.Bf3 Ra6+-) 15.Bf3+- (15.bc5?! bc5 16.Nb5 a6+-) 15...Nec6 (15...cd4 16.Ba8 Bf5+-) 16.Nc6 Nc6 (16...Qc7 17.Ne7! Re7 18.Ba8+-) 17.Bc6 Qg5 (17...Bd7 18.Ba8 Qa8 19.bc5+-) 18.Ba8 Bh3 (18...Be6 19.Bf3+-) 19.Bf3 cb4 (19...Rc8 20.Re1+-) 20.ab4 a5 (20...Re7 21.Re1 Bc8 22.Qd2+-) 21.Re1 Rd8 22.g3 (better is 22.ba5 ba5 23.Ra5 Bf5+-) 22...ab4 23.Ra8 (23.Ra4 b5 24.Rb4 bc4 25.Rc4 Be6+-) 23...Ra8 24.Ba8 Kg7 25.Qa1 Kh7 (25...Qf6+-) 26.Re8 f6 (26...Qe5 27.Qe5 g5 28.Qf6 g4 29.Qf7) 27.Qa7 1–0. chessforces (1610) – maf, net–chess.com, 2001.

3.d4 b6 4.Nc3 (better is 4.a3!?=) 4...Bb4-/+ 5.a3 Ba5 6.e3 Nc6 (6...Nf6 7.Bd3-/+) 7.Bb5 (7.Qg4 g6-/+) 7...Qd7 (7...Bd7 8.Nf3-/+) 8.Nf3=+ a6?? (8...Nge7 9.Ne5 Qd6 10.0-0=+) 9.Bc6?? (better is 9.Ne5 Ne5 10.Bd7 Nd7 11.0-0+-) 9...Qc6-/+ 10.Ne5?? (10.0-0 Nf6-/+) 10...Qd6 11.Nd3 f6 12.Qg4 g6 13.Nf4?? f5 14.Qg3 b5 15.Kd1 e5 16.Ncd5?? ef4-+ 17.Qf4 Qc6 18.Nc7?? Qc7 19.Qc7 Ne7?? 20.Qa5+- Bd7 21.Re1 Nc6 22.Qb6 0-0 23.Qb7 Rab8 24.Qd7 Na5 25.d5 Rbd8 26.Qe6 Rf7+- 27.Qa6 Nb7 28.Qb5 Nd6 29.Qb4 Kf8 30.Be5 Ke7 31.Qb6 Ne4 32.d6 Ke6 33.Qd8 Rf6 34.Bf6 Nf6 35.f4 Kd5 36.Qf6 Ke4 37.Qe5 (37.Qe6) 1–0. ajeffries – mtacta, net–chess.com, 2006.

3.d4 Nc6 4.c3 Nf6 5.h3 (5.e3 Bd6=+) 5...Be7 6.b5 Na5 7.Qa4 (7.Ba3 a6 8.e3 ab5 9.Bb5 c6 10.Be7 Qe7=+) 7...b6 (7...Nc4 8.Bc1-/+) 8.Nf3 (8.Ba3 Bd7=+) 8...Nc4-/+ 9.Qb3 Nb2 (9...a6 10.a4-/+) 10.Qb2=+ 0-0 11.Nbd2 Bb7 12.Ne5 a6 13.e3 ab5 14.Qb5 (14.Bb5 Ba3 15.Qc2 Bd6=+) 14...Ba6-/+ 15.Qc6 Bf1 16.Nf1 Ne4 (16...Ba3 17.Nd3-/+) 17.f3=+ Nf6 18.Ng3 (18.Nd2 Ba3-/+) 18...Bd6 19.f4 Be5 (19...Ra7 20.a4-/+) 20.fe5=+ Ne4 (better 20...Nd7!? 21.0-0 Ra5-/+) 21.Ne4+= de4 22.Qe4 Qd7 23.Qc2 Qc6 24.0-0 Ra3 25.Rfc1 Rfa8 26.Qb2 h6 27.c4 (27.Qf2=) 27...R3a5 (27...Re3 28.Rc2=+) 28.Qc3 (28.Qf2!?+/-) 28...Ra3 29.Qb2 (29.Qd2!?=) 29...Re3=+ 30.Kf2 (30.Rc2 Qe4=+) 30...Qe4 (better 30...Rd3-/+) 31.Qd2? (better 31.Rd1-/+) 31...Raa3 32.Re1 (32.Kf1 Rh3! 33.Kg1 Rag3-+) 32...Rad3 (better 32...Qh4!? 33.Kf1 Rh3 34.gh3 Rf3 35.Ke2 Rf2 36.Kd1 Rd2 37.Kd2 Qd4 38.Ke2 Qe5 39.Kf3 Qc3 40.Kg2 Qc4 41.a4-+) 33.Qe3 Re3 34.Re3 Qd4 35.Rc1?? (35.Rae1-+) 35…Qd2 (35...Qd2 36.Kf3 Qc1-+) 0-1. onikichi - cixon123, Rated Classical game, lichess.org, 2013.

3.d4 g6 4.Nd2 (4.a3!?=) 4...Bb4+= 5.c3 Bf8 6.Qa4 Bd7 7.Qc2 Bg7 8.c4 c6 9.0-0-0 (9.e4!?+=) 9...Nf6-/+ 10.f3 0-0 11.e4 a6 12.ed5? (better is 12.e5 Nh5 13.Nh3+=) 12...cd5-+ 13.Ne2 dc4 14.d5? (better is 14.Ba3 Re8 15.Nc4-+) 14...ed5 15.Bf6 (15.g4-+) 15...Qf6 16.Nc3 d4 (16...Qc3!? 17.Qc3 Bc3 18.Nb1-+) 17.Bc4 (17.Nce4 Qe7 18.Nc4-+) 17...dc3 18.g4 (18.Ne4 Qf4 19.Kb1-+) 18...b5 (better is 18...cd2!? 19.Kd2 Rc8 20.Qd3-+) 19.Be2 cd2 20.Rd2 (20.Kd2 Rc8 21.Qd3 Bg4 22.fg4-+) 20...Qa1 21.Qb1 Qb1 (better is 21...Rc8 22.Bc4 Rc4 23.Rc2 Bh6 24.g5 Bg5 25.f4 Bf4 26.Kd1 Qb1 27.Rc1 Rc1 28.Ke2 Bg4 29.Kf2 Qa2) 22.Kb1 Rd8 23.h4 Nc6 24.Rhd1 Ra7 25.Rd6 h5 (25...Rc7 26.R6d5-+) 26.gh5 (26.Rc6 Re8 27.Rc2 hg4 28.fg4 Re4-+) 26...gh5 (26...Nb4 27.Bd3 Be5 28.Be4 Bd6 29.Rd6 gh5 30.a3-+) 27.R1d5 (27.Rc6 Bf5 28.Kc1-+) 27...Ne7 28.Rh5 f6 (28...Bf5 29.Rf5 Rd6 30.Rc5-+) 29.f4 (29.Bd3 Rc8 30.Bh7 Kf7-+) 29...Raa8 (29...Bf5 30.Rf5 Rd6 31.Rc5-+) 30.Rd3 (30.Bf3 Bf5 31.Kb2 Rd6 32.Ba8 Rd2 33.Kc3 Rc2 34.Kb3 Bg6-+) 30...Bf5 31.Kc2 (31.Rf5 Nf5 32.h5 Bh6-+) 31...Bd3 32.Bd3 Rd5 (better is 32...Rac8 33.Kd2 Rc6 34.a4 ba4 35.Ra5-+) 33.Bh7 Kf8 34.Rd5 Nd5 35.f5 Ne3 36.Kd2 Ng4 37.Ke2 Rc8 38.h5 Nh6 0–1. jmcauley (1800) – beammeupscotty (2115), net–chess.com, 2013.

3.e3 Na6 4.b5 Nc5 5.a4 c6 (5...Nf6 6.Be2=+) 6.d4= Ne4 7.Bd3 cb5 (7...Bb4 8.c3 Bd6 9.Nf3=) 8.ab5= Nd6 (8...Ngf6!?=) 9.Nf3+- a6 (9...Nf6!?+-) 10.0-0 Qb6 11.Nc3 Nc4 (11...Nf6 12.Ne5+-) 12.Bc4 dc4 13.Ne5 Bb4 (13...Nf6 14.Nc4 Qc7 15.Qd3+-) 14.Nc4 (14.Qg4!? Bf8+-) 14...Qc7 15.Qe2 (better 15.Qd3+-) 15...Bc3? (15...Nf6 16.Ra4 Bc3 17.Bc3 Bd7+-) 16.Bc3 Bd7 (16...Ne7 17.Ba5 Qb8 18.Bb4+-) 17.Ba5 b6 (17...Qb8 18.Qg4 g6+-) 18.Bb6 Qb7 19.Nd6 (19.Nd6 Kf8 20.Nb7+-) 1–0. GuestYZBW – GuestPRTY, freechess.org, 2019.

3.e3 b5 4.Bb5 Ke7 5.Nf3 Nd7 (5...Nf6 6.0-0+-) 6.0-0 (6.c4 Ngf6+-) 6...c5 (6...Bb7 7.Nd4+-) 7.bc5 Qa5 (7...a6 8.Bd7 Bd7 9.c4 dc4 10.Na3+-) 8.Nd4 Qb6 (8...Ke8 9.Bc3 Qc7+-) 9.cb6 Nb6 10.Ba3 Kf6 1–0. DEFFM – GuestVZQK, freechess.org, 2019.

3.e3 Qf6 4.Bf6 Nf6 5.b5 (5.a3 c5+-) 5...Bc5 (5...Bd6 6.Nf3+-) 6.Nf3 0-0 7.Bd3 (7.Nc3 Nbd7+-) 7...Bd7 (7...a6 8.ba6 Na6 9.Nc3+-) 8.0-0 (8.Nc3 c6+-) 8...a6 9.Nc3 Bb4 (9...ab5 10.Bb5 c6 11.Be2+-) 10.a4 Bc3 (10...c5 11.Ne5+-) 11.dc3 b6 (11...Bc8 12.c4+-) 12.Ne5 Be8 (12...Bc8 13.Qf3+-) 13.c4 (13.Qf3 Nbd7 14.Nd7 Bd7+-) 13...a5 (13...Nbd7 14.Nd7 Bd7 15.cd5 Nd5 16.e4+-) 14.cd5 Bd7 (14...ed5 15.c4+-) 15.Bc4 ed5 16.Bd5 Nd5 (16...Ra7 17.Bc4 Be8 18.Qd4+-) 17.Qd5 Ra7 18.Nd7 Nd7 19.Qd7 Raa8 20.Qc7 Rab8 21.Rfd1 h6 22.Rd7 Rbc8 23.Qb6 Rc2 24.Qc6! Rc6 25.bc6 Rc8 26.c7 Kh7 27.Rf7 Kg6 28.Rd7 Kf6 29.e4 (29.Rc1 Ke5+-) 29...g5 30.Rh7 (30.Rc1 Ke6 31.Rd8 Ke7 32.Rc8 h5 33.Rd8 Kf7 34.c8Q h4 35.Rc6 Kg7 36.Qb7) 30...h5 31.Rd1 Ke5 32.Rd8 Rd8 33.cd8Q (33.cd8Q Ke4 34.Re7 Kf4 35.Qd5 Kg4 36.Re4) 1–0. DEFFM – GuestHKPG, freechess.org, 2019.

3.e4 c6 4.Nf3 Ne7 (4...de4 5.Ne5-/+) 5.d4 (better 5.Nc3!?=) 5...de4-/+ 6.Ng5 f6 (better 6...e3!? 7.a3 Nf5-/+) 7.Ne4= Nf5 8.Bc4 (8.c3!?=) 8...Bb4 9.c3 Be7 10.0-0 0-0 11.Bb3 b5 12.c4 (12.Qf3 Kh8=+) 12...a6 (12...Na6 13.c5-/+) 13.cb5 (13.Re1 Bb4 14.Re2 a5=+) 13...cb5 (13...ab5 14.a4-/+) 14.d5 e5?? (better 14...Bb7 15.Qf3 Nd6=) 15.d6+- Kh8 16.de7 Ne7 (16...Qe7 17.Nbc3+-) 17.Qf3 (better 17.Nd6!? Nbc6 18.Nf7 Rf7 19.Bf7 Qd1 20.Rd1 Bg4+-) 17...Bb7 18.Qh3?? (better 18.Qe2+-) 18...Be4-+ 19.Nc3 Bb7 (19...Bf5 20.Qe3-+) 20.Rad1 Qc7 (20...Qa5 21.Rfe1-+) 21.Rd3 (better 21.Ba3 Rc8 22.Be6=+) 21...Nd7?? (21...b4 22.Ne2-+) 22.Qh4 (better 22.Rd7 Qc8 23.Bc2+-) 22...Qc6 (22...Nc5 23.Rh3 h6 24.Bc1-+) 23.f3 (better 23.Nd5!? Nd5 24.Bd5-/+) 23...Nc5-+ 24.Bd5? (24.Rd2 Nb3 25.ab3-+) 24...Nd5 (24...Nd3?! 25.Bc6 Nc6 26.Rb1-+) 25.Rd5 b4! 26.Ne4?? (26.Qb4 Na4 Combination) 26...Qd5-+ 27.Nf6 (27.Nf2 a5 28.a3 Qb3-+) 27...Rf6 28.a3 (28.Qb4 Nd3 29.Qd2 Rb6-+) 28...Nd3 29.Bc1 Nc1 (29...Qc5 30.Kh1 e4 31.f4-+) 30.Rc1 ba3 (better 30...Rf3 31.gf3 Qf3-+) 31.Rc7 Rb8 (31...Qd1 32.Kf2 Qd2 33.Kg1 a2 34.h3 Rg6 35.Qh7 Kh7 36.Rg7 Kg7 37.Kf1 a1Q) 32.h3 e4 (32...a2 33.Rc1 Rf3 34.Qg5 Rh3 35.Qg7 Kg7 36.Rc7 Kf6 37.Rf7 Kf7 38.Kf2 Qg2 39.Ke1 a1Q) 33.fe4 Qe5 (better 33...Qd1!? 34.Kh2 a2 35.Qg3-+) 34.Rc1 Qe4 35.Qf2 Rf2 (35...Rf2 36.Rc8 Rc8 37.Kf2 Rf8 38.Kg3 Qf4) 0-1. qusai - faramarz1360, Rated Classical game, lichess.org, 2013.

3.e4 Nf6 4.ed5 Nd5 5.a3 Nc6 6.Nf3 a6 (6...Nf4 7.g3 Nd5 8.Bg2=) 7.c4 (7.Nc3 e5=) 7...Nf6 (7...Nf4 8.d4=) 8.b5 (8.d4 Bd6=) 8...ab5 9.cb5 Na5 (9...Nb8 10.Bc4=) 10.Be2 (10.Qc2 b6=) 10...Be7 (10...Bd6 11.0-0=) 11.0-0 0-0 (11...Bd7 12.Be5=) 12.Nc3 (12.Qc2 c6=) 12...b6 13.Nd4?? (13.Re1 Bb7=) 13...Bb7 (better 13...Qd4 14.Bf3 Bb7-+) 14.Nc6? (better 14.Nf3=+) 14...Nc6-+ 15.bc6 Bc6 16.Bf3 (16.Re1 Bc5-+) 16...Qd7 (16...Bf3 17.Qf3 Qd2 18.Bc1-+) 17.Bc6 (17.d3 Rfd8 18.Bc6 Qc6-+) 17...Qc6 18.Qe2 Ra5 (18...Rfd8 19.d3-+) 19.Rfc1 Rg5 (19...Rfa8 20.d3-+) 20.f3 (20.g3 Qd7-+) 20...Bc5 (20...Qd7 21.Ne4 Ne4 22.fe4 Bc5 23.Kh1-+) 21.Kh1 Qd6 22.Nb5 Qf4 (22...Qd7!? 23.Bf6 gf6 24.Nc7 Re5-/+) 23.Be5?? (better 23.Rc4 Qf5 24.Nc7=+) 23…Re5-+ (23...Re5 24.Qf1 Nd5-+) 0–1. GuestKVNF – rafaiani, freechess.org, 2016.

3.f3 f6 4.c3 Bd6 5.h4?? (5.e4!?=+) 5...Ne7 (5...Bg3) 6.d3 c5 (6...Bg3 7.Kd2-/+) 7.a3 cb4 8.cb4 0-0 9.Nh3 Bd7 10.Nd2 (10.e4 a5-/+) 10...Nbc6 11.e3 (11.e4 Bg3 12.Nf2 Qb6-/+) 11...Rc8 (11...Nf5 12.e4 Bg3 13.Nf2-+) 12.Be2 e5 Black prepares the advance d4 13.Nf2? (13.Qb3 Kh8-/+) 13...Ng6?? (better 13...Nf5 14.e4 Ne3-+) 14.g4 d4 15.Qb3 Kh8 16.h5 de3 17.hg6 ed2 18.Kd2 h6 19.Ne4 Qe7 20.b5 (20.Qd5 Bb8=+) 20...Na5 (20...Nd4 21.Bd4 ed4 22.Kd1-/+) 21.Qa4=+ b6 22.Bc3 (22.Ke1 Bc5 23.Rc1 Be3-/+) 22...Rc7 (22...a6!? 23.Nd6 Qd6 24.Ba5 ba5 25.Qa5 Bb5-/+) 23.Nd6 Qd6 24.Bb4 (better 24.Ba5 ba5 25.Qa5-/+) 24...Nc4?? (24...Qd4 25.Rad1 Rfc8-+) 25.Ke1= Qd4 26.Rb1?? (26.Rc1 Nb2 27.Rc7 Na4 28.Bf8 Qa1 29.Bd1+-) 26...Rfc8?? (better 26...Ne3 27.Qb3 Rfc8-+) 27.dc4+- Qe3 (27...Qf4 28.Bd6 Rc4 29.Bc4 Rc4 30.Qb3 Bg4 31.Be5 (worse 31.fg4 Re4 32.Kd1 Rd4 33.Ke1 Qd2 34.Kf1 Rf4 35.Qf3 Rf3 36.Kg1 Qf2) 31...fe5 32.Rd1 Qg3 33.Kf1-/+) 28.Bd2 Qc5 29.Qb3 e4 (29...Be6 30.Rc1+-) 30.Be3 Qe5 31.f4 Qd6 32.g5 fg5 33.fg5 (33.Rd1!? Qg6 34.fg5 Kg8+-) 33...Qg3 34.Bf2 (better 34.Kd1 Qd6 35.Bd2 Re8+-) 34...Qb3 (34...Qg5 35.Qg3 Qg3 36.Bg3 Rc5+-) 35.Rb3 Bf5 (35...Rc4 36.Bc4 Rc4 37.Rh4+-) 36.gh6 Bg6 (36...Rd7 37.Rg3+-) 37.hg7 (better 37.Rg3 e3 38.Be3 Re8 39.Rg6 Kh7+-) 37...Kg7 38.Bd4 Kg8 (38...Kf8 39.Rg3 Rh7 40.Rf1 (40.Rg6?! Rh1 41.Kf2 Rd8+-) 40...Bf7 41.Rg4+-) 39.Rh8 (better 39.Rg3 Rg7 40.Rh6+-) 39...Kf7 40.Rc8 (40.Rh4 Bf5+-) 40...Rc8 41.Kf2 (41.Rc3 Rd8 42.Be3 Rd7+-) 41...Ke6 (41...Rd8 42.Ke3+-) 42.Bg4 (better 42.Rg3!? Bf5+-) 42...Bf5 43.Bf5 Kf5 44.Ke3 (better 44.Rc3!? Rd8 45.Ke3 Rg8+-) 44...Rc4 45.Rb4 Rc1 46.Ke2 (46.Rb2 Re1 47.Re2 Rb1 48.Rf2 Ke6 49.Rf6 Kd5 50.Rf5 Kc4 51.Ke4 Re1 52.Be3 Ra1=) 46...Rc2 47.Ke3 Ra2?? (47...Rc1 48.Rb2 Re1 49.Re2 Re2 50.Ke2 Ke6+-) 48.a4 (better 48.Ra4 Rh2 49.Ra7 Rh3 50.Kf2 Rh2 51.Kg3+-) 48...Ra3 49.Ke2 Ra2 (49...Kf4 50.Bb2 Re3 51.Kd2 Rd3 52.Kc2+-) 50.Ke1 (better 50.Bb2!?+-) 50...Kf4 51.Bg7 Kf3 52.Rb3 (better 52.Bb2!?+-) 52...e3+= 53.Bd4 Ra4 54.Be3 a6 55.Bb6 Ke4 56.ba6 Ra6 57.Rb4 Kd5 58.Bd8 Ra1 59.Kd2 Ra2 60.Kc3 Ra3 61.Kb2 Rh3 62.Rb5 Ke6 63.Rb3 (better 63.Kc2!?+-) 63...Rb3= 64.Kb3 ½–½. beatmeeasy (1830) – Traiant (1825), lichess.org, 2020.

3.Nf3 Qe7 4.a3 c5 5.bc5 Qc5 6.e3 Nc6 7.Be2 Nge7 (7...Nf6 8.Bf6 gf6 9.0-0=) 8.0-0 Nf5 9.d4 (9.Nc3 Nd6+=) 9...Qd6 (9...Qb6 10.Ra2=) 10.Nbd2 a6 (10...Be7 11.c4+=) 11.c4 dc4 (11...Be7 12.Bd3+-) 12.Nc4+- Qc7 (12...Qd8 13.e4 Nfe7 14.Ne3+-) 13.e4 (13.Rc1 Nfe7+-) 13...Nd6 14.e5 (14.Nd6 Qd6 15.Re1 b5+-) 14...Nc4+= 15.Bc4 b5 16.Be2 (16.Bd3 Bb7+=) 16...Bb7= 17.Rc1 (17.Bd3=) 17...0-0-0 (better 17...Qd7!?=) 18.Qc2 Kb8 (18...Kd7 19.d5! ed5 20.e6 Ke7 21.Ne5 fe6 22.Nc6 Bc6 23.Qc6 Qc6 24.Rc6+-) 19.Qb3 (19.a4 b4+-) 19...Na5 (19...Kc8 20.a4 b4 21.Bc4+-) 20.Rc7 (20.Qe3 Nc4 21.Bc4 bc4+-) 20...Nb3 21.Rf7 Bf3 (better 21...Rc8!? 22.Bd1 Na5+-) 22.Bf3+- (22.Rf3?! Nd4 23.Bd4 Rd4=) 22...Nd2 23.Rb7 Kc8 (23...Ka8 24.Rb6 Ka7 25.Re6 Nf3 26.gf3+-) 24.Rc1 Nc4 25.Ra7 g6 (25...Rd7 26.Ra6 Rc7 27.Bc6 Rc6 28.Rc6 Kd7 29.Ra6 Nb2 30.Ra7 Kd8 31.Rb1+-) 26.Ra6 Rd7 (26...Bh6 27.Rc2+-) 27.Re6 (27.a4 Kd8 28.Bc3 Rc7 29.ab5 Rc8+-) 27...Bh6 (27...Kd8 28.Bc3 Ba3 29.Rb1+-) 28.Rc2 Kd8 29.Ra6 (better 29.Bc6 Re7 30.Re7 Ke7 31.Bb5 Nb2 32.Rb2+-) 29...Nb2 (29...Rf8+-) 30.Ra8 Ke7 31.Rh8 Rd4 (31...Nc4 32.Rh7 Kd8 33.Rh6 Rd4 34.e6+-) 32.Rh7 (32.Rh7 Ke6 33.Rh6+-) 1–0. DEFFM – GuestJWTT, freechess.org, 2016.

3.Nf3 Be7?? 4.Bg7+- Bf6 5.Bh8 Bh8 6.d4 Nc6 (6...Qd6 7.a3+-) 7.b5 Nd4 (7...Nce7+-) 8.Nd4 c5 (8...e5 9.Nb3 e4 10.Nd4+-) 9.bc6 bc6 10.Qd3 (10.Nc6?! Qb6 11.Nd2 Qc6+-) 10...c5 11.Qh7 Bd4 (11...Qg5 12.e3 Bd4 13.ed4 Qc1 14.Ke2 Ba6 15.Kf3 Qd1 16.Kg3+-) 12.Qg8 Ke7 13.Qd8 Kd8 14.c3 Be5 (14...Bg7 15.h4+-) 15.h4 d4 16.Na3 dc3 17.0-0-0 Ke7 18.Nc4 (18.h5 Bb7+-) 18...Bf6 19.h5 Ba6 (19...Bd7 20.e3+-) 20.e3 (20.Na5 Bb5 21.e3 Ba4+-) 20...Bb5 (20...Rb8 21.Na5 Rb6 22.Nb3+-) 21.Bd3 (21.h6 Ba4 22.Re1 Rd8+-) 21...Ba4 22.Bc2 Bb5 (22...Bc6 23.Rh2+-) 23.Na5 Be2 (23...Rg8 24.g3+-) 24.Nc6 Kf8 (24...Ke8 25.Rd6+-) 25.Rd7 Kg7 (25...Bc4+-) 26.h6 Kh8 (26...Kf8 27.h7 Bh8 28.Ne5+-) 27.Rf7 Bg5 28.Rh7 Kg8 29.Rg7 Kh8 30.Ne5 Bh6 (30...Bh5 31.Rh5 Bh6 32.Rg6 Rd8 33.Rhh6) 31.Rg5 Rf8 (31...Bh5 32.Nf7! Bf7 33.Rh6) 32.Rh6 1–0. kamret (2185) – srono1, GameColony.com, 2003.

3.Nf3 Qf6?? 4.Bf6+- Nf6 5.a3 Bd7 6.e3 c5 7.bc5 Bc5 8.Ne5 Nc6 9.Nd7 Nd7 10.d4 Bd6 11.Nd2 0-0 12.c4 dc4 13.Nc4 Be7 14.Bd3 Nf6 15.g4 h6 (15...Rab8 16.Rb1+-) 16.h4 Nd5 (16...h5 17.g5 Ng4 18.f3+-) 17.g5! b5 (17...hg5 18.hg5 Combination) 18.Nd2 e5 (18...a6 19.gh6 g6 20.Qg4+-) 19.Qf3 Rad8 20.Be4 Nd4 (20...ed4 21.Bd5 de3 22.fe3+-) 21.ed4 (21.Bd5?! Nf3 22.Bf3 hg5 23.hg5 Bg5+-) 21...Nf4 22.de5 Bc5 (22...hg5 23.hg5 Bg5 24.Bh7 Kh8 25.Bc2 Kg8 26.Qg4 Ng2 27.Kf1 Rd2 28.Bh7 Kh8 29.Qg5 Ne3 30.fe3 Rh2 31.Rh2 f6 32.Be4 Kg8 33.Bd5 Rf7 34.Qg6 fe5 35.Qf7) 23.Qf4 Rd4 24.gh6 Rfd8 25.Rg1 Rd2 26.Rg7 Kh8 27.Rh7 Kg8 28.Qf7 1-0. PEREIRA – Whitak, internet, 2021.

3.Nf3 Nh6 4.g3 Nc6 (4...Bb4? 5.Bg7 Rg8 6.Bh6+-). Jokmin,Alex – Smith,Harry, SN–2010-0-00280, 2010.

3.f4 a5 4.b5= c5 (4...Nf6 5.e3=) 5.Nf3 Nf6 6.e3 Be7 (6...Bd6 7.Be2=) 7.Bd3 (7.Be2 Nbd7=) 7...0-0 (7...Nbd7 8.0-0=) 8.Nc3 (8.a4 Nbd7=) 8...b6 (8...Nbd7 9.0-0=) 9.0-0 (9.Na4 Bb7=) 9...Bb7 (9...a4 10.a3=) 10.Qe1 (10.Na4 Nbd7=) 10...Nbd7 (10...a4 11.a3=) 11.Qg3 g6 (11...Qc7 12.Na4=) 12.Qh3 Ne4 (better 12...a4!? 13.a3 c4=) 13.Ne4+- de4 14.Qh6 f6?? (14...e5 15.Ne5 Ne5+- (15...ed3?? 16.Nc6 Bf6 17.Nd8 Rad8 18.Bf6 Nf6 19.c4+-)) 15.Ng5!+- (15.Ng5 Rf7 16.Bc4+- (16.Nf7?! Qf8 17.Qf8 Bf8 18.Nh6 Bh6+-)) 1–0. Leonco – Sfen, internet corr, 2018.

3.f4 a6 4.Nf3 Nc6 (4...Bb4?? 5.Bg7 Be7 6.Bh8+-) 5.a3 h6 6.e3 f6 7.Nh4 h5 (7...Nge7!?+=) 8.Be2+/– Nge7 9.Bh5 Kd7 10.g3 f5 11.Bf7 b5 12.Nf3 g6?? (better is 12...Rh6+-) 13.Ng5 Kd6 (13...e5 14.fe5 Nd4 15.ed4+-) 14.Bg6 Ng6 15.Nf7 (15.Nf7 Kd7 16.Nd8 Nd8 17.Bh8 Nh8 18.a4+-) 1–0. b4_player – kemme, casual, 2013.

3.f4 b5 4.Nc3 Bd7 5.Nf3 Nf6 6.a4 ba4 7.b5 (worse 7.Na4 Bb4 8.e3 Nc6=+) 7...Ne4 8.e3 f6? (better 8...Nc3!? 9.Bc3 a3=) 9.Ra4+- a6 (better 9...Nc3!? 10.Bc3 Bc5+-) 10.Ne4+- de4 11.Re4 ab5 12.f5 Be7 13.fe6 Bc6 14.Rg4 0-0 15.Nd4 Qd5 (15...Ra2 16.Qb1 (16.Nc6?! Nc6 17.Bb5 Qb8+-) 16...Ra4 17.c4+-) 16.Bd3 f5 (16...g6 17.0-0 Qh5+-) 17.Rg7 Kg7 (17...Kh8 18.Qh5 Bh4 19.Qh4 Ra1 20.Ba1 h5 21.Qh5 Kg7 22.Nf5 Kg8 23.Nh6) 18.Nf5 Kg6 19.Qg4 Bg5 20.Ng3 Kh6 (20...Qd3 21.Qh5) 21.Qh5 1–0. Pierre – 5gjodo5, internet, 2019.

3.f4 c5 4.bc5= Nf6 5.Nf3 (5.d4 Ne4 6.Nf3 b6=) 5...Bc5=+ 6.e3 Qb6 (6...0-0 7.Be2=+) 7.Bf6= gf6 8.Nc3 Qc7 (8...Qa5 9.Rb1=) 9.Nb5 Qc6 (9...Qd7 10.Nbd4=) 10.Bd3 e5? (10...a6 11.Rb1 Qd7= (11...ab5? 12.Bb5 Rg8 13.Rg1+-)) 11.fe5+- fe5 (11...Bg4!?+-) 12.Ne5+- Qb6 13.Qh5 Be6? (13...Rf8+-) 14.Nf7! Bf7 15.Qe5 Be7 (15...Kd7 16.Qh8 Bg6 17.Rb1+-) 16.Qh8 Kd7 (16...Bf8 17.Qe5 Kd8 18.Qf4+-) 17.0-0 Be6 18.Nd4 Nc6 (18...a6 19.Rab1 Qc7 20.Bf5 Bf5 21.Rf5+-) 19.Qa8 (19.Qa8 Nd4 20.Rab1+-) 1–0. Barcarola – ovrae00, internet free game, 2018.

3.f4 Be7?? 4.b5?? (better 4.Bg7 Bf6 5.Bh8 Bh8 6.Nc3+-) 4...Bf6 5.Nc3 d4 (5...Qd6!?=) 6.Ne4+= Bd7 (6...a6 7.Nf3 ab5 8.Nf6 Nf6 9.Nd4+=) 7.a4+- a6 (7...Be7 8.Bd4 Nf6 9.Nf6 Bf6 10.e3+-) 8.Qb1 ab5 9.ab5 Ra1 10.Ba1 (10.Qa1?! Bb5 11.Nf3 Nc6=) 10...Bb5?? (better 10...d3 11.Nf6 Nf6+-) 11.Qb5+- Nc6 12.Qb7 Qd5 13.Nf6 (13.d3 Bd8 14.Nf3 Nge7+-) 13...Nf6 14.Qa8 Nd8 (14...Ke7 15.Qa3 Kd7 16.Nf3+-) 15.Qd5 Nd5 (15...ed5 16.Bd4 Ke7 17.Bc5 Kd7 18.Nf3+-) 16.Bd4 0-0 17.c4 Nb4 (17...Nf4 18.Be5 Nh5+-) 18.Bc5 Nbc6 (18...Ndc6 19.Bf8 Kf8 20.Nf3+-) 19.Bf8 Kf8 20.Nf3 Nb4 21.e3 Ndc6 (21...Nb7 22.Be2+-) 22.Kf2 f6 23.c5 h6 (23...Ke7 24.Bc4+-) 24.Bc4 Ke7 25.Rb1 g5 (25...h5 26.Nh4+-) 26.Kg3 h5 (26...gf4 27.Kf4 Nc2 28.Bd3+-) 27.fg5 f5 28.Kh4 Nc2 29.Rb7 (29.Rb7 Na3 30.Rc7 Kf8 31.Be6+-) 1–0. Janek – fixiq, internet, 2017.

2.f4 h5 3.Nf3 Nh6 4.Bb2 (4.e3 Bg4=) 4...a5 5.a3 e6 (5...Bg4 6.e3=) 6.b5+= c5 (6...Nf5 7.e3+=) 7.bc6 bc6 8.e3 Nf5 9.Bd3 Ba6 10.Bf5 ef5 11.d3 Qb6 12.Bd4 (12.Qc1 Be7+=) 12...c5= 13.Bc3 Nc6 14.0-0 (14.Qe2 Rh6 15.Ng5 Ra7=) 14...d4 15.ed4 cd4 16.Be1 Be7 (16...Bd6 17.Bg3=) 17.Nbd2 Qc7 18.Bh4 (18.Nb3 Rd8 19.Bf2 0-0+=) 18...f6 (18...Qf4 19.Re1=) 19.Bg3 Kf7 (19...Qd7 20.Re1+=) 20.Nh4 (20.Nb3!?+=) 20...g6= 21.Qf3 Qd7 (21...Rab8 22.Be1=) 22.Rfe1 Bb7 23.Nc4 Ne5 (better 23...Rab8!?+=) 24.fe5+/- (24.Ne5?! fe5 25.Qf2 e4 26.de4 fe4=) 24...Bf3 25.e6 Qe6 26.Re6 Ke6 27.Ng6 Bd5? (27...h4 28.Re1 Be4 29.de4 hg3 30.ef5 Kf5 31.Ne7 Kg5 32.hg3 Rhd8+-) 28.Re1 (28.Nf4!? Kf7 29.Nd5 h4+-) 28...Kf7 29.Ne7 Bc4 30.dc4 Rhe8 (30...f4 31.Bh4 Rhe8+-) 31.Nf5 Re1 32.Be1 Rb8 (32...a4 33.c5+-) 33.Ba5 Rb1 (33...Kg6 34.Nd4 Rc8 35.Bb4+-) 34.Kf2 Ra1 (34...Rd1 35.c5 d3 36.cd3 Rd3 37.Bb4+-) 35.Bb4 (worse 35.Nd4 Ra3 36.Bb4 Ra4+-) 35...Rd1 (35...Ke6 36.Nd4 Kd7 37.c5+-) 36.c5 Ke6 (36...Ke8+-) 37.c6 d3 38.Ne3 (better 38.Nd4 Kd5 39.c7+-) 38...dc2 39.Nc2 Rc1 40.Nd4 Kd5 41.Ke3 (better 41.Ne2 Rc4 42.c7 Rc7 43.Nf4 Ke5 44.Nh5 f5+-) 41...h4 (41...Rc4 42.Ne2 Kc6+-) 42.Ba5 Rc4 (42...Kd6 43.Bd8 Re1 44.Kd3+-) 43.c7 Kd6 44.Nb5 Kd7 45.Na7 Rc2 46.c8Q (46.c8Q Rc8 47.Nc8 Kc8 48.h3+-) 1-0. Lewtak,Da (2380) - Starozhilov,L (2315), Titled Tuesday 6th Apr, 2021.

3.g3 a5 4.b5 a4 5.Nf3 c6 6.Nc3 Bb4 (better is 6...a3 7.Bc1 d4+=) 7.Nd5!+/– ed5?? (7...cd5 8.Bg7 Combination; 7...Qd5 8.Bg7 Combination; 7...ed5 8.Bg7 Combination) 8.Bg7+- Qa5 9.Bh8 (better is 9.bc6 Nc6 10.Bh8+-) 9...c5 (9...Qb5 10.Qb1 Qb6+-) 10.a3 c4 (10...Ba3 11.Ra3 Qb5 12.Qa1+-) 11.ab4 Qb4 12.Nd4 c3 13.e3 Nd7 14.d3 Nc5 15.Rb1 a3 (15...Qa3+-) 16.Rb4 a2 17.Qa1 Nh6 18.Ne2 Bf5 19.Nc3 Ng4 20.Nd5 Ne5 21.Qe5 Ne6 22.Qd6 a1Q 23.Kd2 (23.Kd2 Qe1 24.Ke1 Ra1 25.Ba1 Bd3 26.Qe7; 23.Ba1 Ra1 24.Kd2 Rd1 25.Kd1 Bg4 26.Rg4 Nd4 27.Rg8) 1–0. pierre – tulel, internet, 2010.

3.g3 a6 4.a3 b5 (4...Nf6 5.Nf3+=) 5.Nf3 c6 (5...Nf6 6.Bg2+=) 6.Bg2 (6.a4 Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+-) 7.c3 ba4=) 6...f5 (6...a5 7.c3=) 7.0-0 (better is 7.a4=) 7...g6?? (better is 7...a5=) 8.Bh8+- Nf6 9.Qc1 (9.d4 a5 10.ba5 Ra5+-) 9...Bh6 (9...a5 10.Qb2 Be7 11.d4+-) 10.a4 (10.Qb2 Nbd7+-) 10...Kd7 (10...Kf7 11.Ne5 Kg8 12.Qb2+-) 11.Ne5 Kd6 (11...Ke8+-) 12.Nf7 (12.Nf7 Ke7 13.Nd8+-) 1–0. marre – hoszec, internet, 2010.

3.g3 c5 4.a3 (4.bc5 Nf6 5.d4 b6 6.cb6 Qb6=) 4...cb4 (4...Nf6 5.bc5 Bc5 6.e3+=) 5.ab4 Nf6 (5...Qb6 6.c3+=) 6.c3 (6.b5 Bc5+=) 6...Be7 (6...e5 7.Nf3 Bd6 8.Bg2+=) 7.Bg2 (7.Nf3 0-0+=) 7...0-0= 8.Nf3 b5 (8...Nc6 9.0-0+=) 9.0-0 (9.Qc2 a5=) 9...Nc6+= 10.d3 Qc7 (10...a5 11.Na3+=) 11.Nbd2 (11.Na3 Rb8=) 11...Bb7 (11...Rd8 12.Re1+=) 12.Rc1 (12.Nb3 e5=) 12...Rac8 (12...Rfc8 13.Nb3+=) 13.e4 (13.Qb3 Rfd8+=) 13...Rfd8 (13...de4 14.de4 Rfd8+=) 14.e5 (14.ed5!? Nd5 15.c4 bc4 16.b5+=) 14...Ne5-/+ 15.Ne5 Qe5 16.Re1 Qc7 17.Nb3 a6 18.Na5 (18.Ra1 e5-/+) 18...Ba8 19.Qe2 h6 20.c4? (better is 20.Nb3-/+) 20...Bb4-+ 21.Bf6 (21.cd5 Qa5 22.Bf6 gf6 23.Rc8 Rc8 24.Rb1-+) 21...Be1 (better is 21...gf6 22.Qg4 Kh8 23.cd5 Qa5 (worse is 23...Ba5 24.Rc7 Rc7 25.Qf4+/–) 24.Rc8 Rc8-+) 22.Bd8= Qd8 (better is 22...Bf2!? 23.Qf2 Qd8=) 23.Qe1+/– dc4 (23...bc4 24.dc4 Rc5 25.cd5 Ra5 26.de6 fe6 27.Ba8+-) 24.dc4 (24.Ba8 Ra8 25.dc4 Rc8+/–) 24...bc4 (24...Bg2 25.Kg2 bc4 26.Qc3+/– (26.Rc4? Rc4 27.Nc4 Qd5 28.f3 Qc4-+)) 25.Ba8 (25.Nc4? Bg2 26.Kg2 Qd5 27.Kg1 Rc4-+) 25...Ra8 26.Nc4 (26.Nc4 Rc8 27.Rd1+/–; 26.Nc6 Qd3+/–) 1–0. coloplayah (2150) – stormer (2210), net–chess.com, 2006.

3.g3 c6 4.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.g3 c6).

3.g3 Nd7 4.Bg2 Ngf6 5.Nf3 h6 6.0-0 a6 7.d4 g6 (7...Bb4!? 8.Nbd2 0-0+=) 8.Nbd2 b6 (8...Bb4 9.c3 Be7 10.c4=) 9.e4 Bg7 (better is 9...de4!? 10.Ne5 Bb7 11.Nd7 Nd7 (worse is 11...Kd7 12.d5 ed5 13.Ne4 Ne4 14.Be4+/–) 12.Ne4 Bd5+/–) 10.ed5+/– Nd5 11.c4 Nb4? (better is 11...Ne7+/–) 12.a3?? (better is 12.Ne1 c6 13.a3+-) 12...Nc6+/– 13.Qe2 (13.Qa4 Ne7 14.Ne4=) 13...0-0 14.Ne1 (14.Nh4!? Ndb8 15.Nb3+=) 14...Bb7 (14...Bd4? 15.Bc6 Bb2 16.Ra2+-; 14...Nd4?! 15.Bd4 Bd4 16.Rd1-/+) 15.Ra2? (15.Nb3 Qg5+=) 15...Rb8 (15...Nd4 16.Bd4 Bg2 17.Kg2 Bd4 18.Ndf3-+) 16.h4 (16.Nef3 b5+=) 16...Nf6 (16...Nd4 17.Bd4 Bg2 18.Kg2 Bd4 19.h5-+) 17.Bc3? (better is 17.Nef3!?-/+) 17...Nd4-+ 18.Bd4 Bg2 19.Kg2 c5?? (better is 19...Qd4 20.Nef3 Qg4-+) 20.Be3 (20.Be5 Rb7+-) 20...h5 (20...e5 21.Nd3 Qd6 22.f3+-) 21.f4 (better is 21.Bf4!? Rb7 22.Nd3+-) 21...Ng4 22.Ne4 Ne3 23.Qe3 Qd7 24.Rd2 Qc6 25.Nf3 Rbd8 26.Neg5 (26.Re2!? Bd4 27.Qb3 f6+-) 26...Rd2 27.Qd2 Bf6 28.f5?? (better is 28.Qe2+-) 28...Bg5 29.hg5 gf5 30.g6 (30.Rh1!? e5 31.Rh5+-) 30...fg6+= 31.Qh6 Rf7? (better is 31...e5+=) 32.Qg6+- Rg7 33.Qh5 b5?? (33...Qd7 34.Rh1 Rh7 35.Qg5 Rg7+-) 34.Rh1 bc4 (34...Kf8 35.Qh8 Kf7 36.Kf2+-) 35.Qh8 (35.Kf2 Kf8 36.Qh8 Rg8 37.Qf6 Ke8+-) 35...Kf7 36.Qh5 (better is 36.Kf2 Qc7 37.Ng5 Kf6 38.Qh6 Rg6 39.Qf8 Ke5 40.Qh8 Kd5 41.Qa8 Kd6 42.Rd1 Ke7 43.Qh8+-) 36...Kf8 (36...Kg8 37.Kf2 Kf8 38.Qh8 Rg8 39.Qf6 Ke8 40.Ne5 Rf8 41.Qg6 Ke7 42.Nc6 Kd7 43.Rd1 Kc7 44.Qe6 Rc8 45.Qd7 Kb6 46.Rb1) 37.Qh8 Kf7 38.Rh7 (better is 38.Kf2 Qc7 39.Ng5 Kf6 40.Qh6 Rg6 41.Qf8 Ke5 42.Qh8 Kd5 43.Qa8 Ke5 44.Re1 Kf6 45.Qh8 (45.Ne6 Qg3 46.Ke2 Rg8=) 45...Ke7 46.Qh7 Kd6 47.Qg6+-) 38...Rh7+= 39.Qh7 Kf6 (39...Ke8!?+=) 40.Qh4+/– (40.Qh4 Kg7 41.Qc4+/–) 1–0. nimzou (1705) – beammeupscotty (2100), net–chess.com, 2014.

3.g3 f6 4.b5 (4.a3 c5+=) 4...Nd7 (4...e5 5.Bg2+=) 5.Nf3 (5.Bg2 Nb6+=) 5...a6 (5...Nb6 6.Bg2+=) 6.Nc3 (6.ba6 Ra6 7.Nc3 Nc5=) 6...ab5+= 7.Nb5 c6 8.Nc3 Nh6 (8...e5 9.Bh3+=) 9.Bh3 (9.Bg2 e5+=) 9...Nc5 (9...e5 10.0-0+=) 10.d4 Na6 (10...Qb6 11.Qc1 Na4 12.Na4 Ra4 13.0-0+=) 11.0-0= Nf5 (11...Bd6 12.e4=) 12.Re1 (12.e4 Nd6 13.ed5 Nc4=) 12...c5 (12...Nd6 13.e4 Nc4 14.Qc1=) 13.e4 (13.Bf5!? ef5 14.dc5+=) 13...cd4= 14.ef5 (14.Nb5 Qb6 15.ef5 Qb5=) 14...dc3 15.Bc3 e5 (15...Qc7 16.Bb2 Bb4+/–) 16.Be5!+/– fe5? (better is 16...Be7 17.Bf4 0-0+/–) 17.Ne5+- Be7 (17...Bb4 18.Nc6 Be1 19.Qh5 Kd7 20.Nd8 Bc3 21.f6 Kd8 22.Qd5 Kc7+-) 18.Qh5 g6 19.fg6 h6 (19...Bb4 20.g7 Ke7 21.Nd7 Be1 22.Re1 Kd6 23.Qh6 Qf6 24.Qf6 Kc7 25.Qb6) 20.g7 1–0. marre – fofobi, internet, 2010.

3.g3 h6 4.Bg2 Bd7 5.a3 Nf6 6.Nf3 c6 7.0-0 Qb6 8.Ne5 Be7 9.c4 d4 10.c5 Qc7? (better is 10...Bc5!? 11.Nc4 Qb5 12.Bd4 Qc4 13.Bc5 Na6+=) 11.Bd4+- 0-0 12.Nc3 Bc8 13.Rc1 Nbd7 14.Nc4 a6 15.Ne4 e5 16.Bb2 Ne4 17.Be4 b5?? (better is 17...f5 18.Bg2 Kh7+-) 18.cb6!+- Nb6 19.Ne5 Rb8 (19...Bb7 20.Nc6 Qd6 21.Be5+-) 20.Nc6 (worse is 20.Rc6 Qd8 21.Qc2 Be6+-; worse is 20.Bc6 Qd6+-) 20...Bh3 21.Bg2 (better is 21.Nb8 Qb8 22.Re1 Be6+-) 21...Bg2 22.Kg2 (22.Nb8?! Qb7 23.Be5 Bf1 24.Qf1 f6+-) 22...Qb7 23.Kg1 Rbc8 24.Ne7 Kh8 (24...Qe7 25.Bd4 Qe6+-) 25.Nc8 Rc8 26.d3 Rc1 27.Qc1 Na4 (27...f6 28.e4+-) 28.Bd4 (28.Qh6! Kg8 29.Qg7) 28...Kh7 29.Qf4 Qd5 30.Qe4 Qe4 31.de4 f6 32.Rc1 Kg6 33.Rc6 1–0. hobgoblin (2205) – lopesq (2105), net–chess.com, 2011.

3.g4 Bb4 4.Bg7 Qg5 5.Bh8 Qg4 6.c3 Be7 7.Bh3 (7.Be5 Na6+-) 7...Qe4 8.f3 (8.Nf3!? Nd7+-) 8...Qg6 (8...Qh4 9.Kf1+-) 9.Be5 Nc6 (9...Bh4 10.Kf1 Kd8 11.Qa4+-) 10.Bc7 Bh4 11.Kf1 Bd7 12.d4 Nf6 13.Qd3 Qh6 14.Nd2 Nh5 (14...Rc8 15.Bd6+-) 15.e3 Rc8 16.Be5 (better 16.Bd6!? Na5+-) 16...Ne5 17.de5 Rc5 18.Qd4 b6 (18...Be7 19.Ke1+-) 19.Qh4 Rc3 20.f4 Re3 21.Qf2 (better 21.Kf2 Rd3 22.Ndf3+-) 21...Bb5-+ 22.Kg2 (22.Ne2 Re2 23.Qe2 Qf4 24.Ke1 Be2 25.Ke2 Qe5 26.Kd3 Nf4 27.Kc2 Qc7 28.Kd1 Nh3-+) 22...Nf4 (22...Qg6 23.Bg4 Qg4 24.Qg3 Rg3 25.Kf2 Rg2 26.Ke1 Rg1 27.Kf2 Rg2 28.Ke1 Qe2) 23.Qf4-+ Qf4 24.Ndf3 (24.Rb1 Bd3 25.Rb3 Be4 26.Ne4 Qe4 27.Kf2 Rb3 28.ab3 Qh1-+) 24...d4 (24...Be2 25.Rf1 Bf1 26.Kf1 Rf3 27.Nf3 Qf3 28.Kg1 Qh3 29.Kf2 Qf5 30.Kg2 Qe4 31.Kg1 Qe5 32.h4-+) 25.Kf2 Rc3 26.Re1 (26.Bf1 Rc2 27.Be2 Be2 28.Ne2 Qe3 29.Kg3 Qe2-+) 26...Bc6 (better 26...Rc2 27.Ne2 Be2 28.Re2 Re2 29.Ke2 Qe3 30.Kf1 Qf3 31.Ke1 Qh1 32.Bf1 Qe4 33.Kd2 Qf4 34.Ke1 Qe5 35.Kd1 Qf5-+) 27.Bg2 d3 28.h4 d2 29.Rd1 (29.Rf1-+) 29...Bf3 (better 29...Qe3 30.Kg3 Qe5 31.Kf2 Qe3 32.Kg3 Qe1 33.Re1 de1Q (33...de1B?! 34.Kh2 Bf2 35.Ne2-/+; 33...de1N?! 34.Ne2 Rf3 35.Bf3 Nf3 36.Rc1-+) 34.Kh2 Qe3-+) 30.Bf3 Rc1 (better 30...Ra3-+) 31.Ne2 Qa4?? (better 31...Rd1 32.Rd1 Qh4 33.Ke3 Qg5 34.Kf2 a6-+) 32.Nc1+/- dc1Q 33.Rc1 Qa2 34.Kg3 Qb2 35.Rce1 (35.Rhe1 a6+/-) 35...Qd4 36.Re4 Qc5 37.h5 Qc7 38.Kg4 f6?? (better 38...a5+=) 39.ef6+- Qf7? (39...Kf7 40.Rhe1 Qd7 41.Re6 h6+-) 40.Kg5 (better 40.Rhe1 Qd7 41.Re6 Kf7 42.Kg5 h6 43.Kh6+-) 40...Qg8 (better 40...h6 41.Kg4 Qf6+-) 41.Kh6?? (better 41.Kh4 Qf7 42.Rf4+-) 41...Qf8= 42.Kg5 h6 (42...Qg8 43.Kh4 Qf7+-) 43.Kg6?? (better 43.Kg4 Qf6 44.Rhe1+-) 43...Qg8?? (better 43...Qf7 44.Kh6 Qf6 45.Kh7 Kf7-/+) 44.Kh6+- Qh8 45.Kg5 Kf7 46.Rf4 Qg8 47.Kh4 Qh7 (47...Qb8 48.Kg3 Qg8 49.Bg4 e5+-) 48.Rg1 (better 48.Rc1 Qh6 49.Rc7 Kf8+-) 48...Qh6 (48...Qc2 49.Rg7 Kf8 50.Ra7+-) 49.Rg7 Kf8 50.Kg4 e5 51.Rf5 (51.Rf5 Qc1 52.h6 Qh6 53.Ra7 Qg6 54.Rg5+-) 1-0. mustroll - brutilio (1635), Rated Classical game, lichess.org, 2013.

3.g4 Bd6 4.Bg7 Nd7 5.Bh8 Be5 (5...Ngf6 6.g5 Ng8 7.h4+-) 6.Be5 Ne5 7.h3 Qe7 8.a3 Bd7 9.Bg2 Nf6 10.d3 0-0-0 11.g5 Ng8 12.h4 f6 13.e4 (13.d4!? Nc4 14.Nf3 Bc6+-) 13...fg5 14.ed5 (better 14.d4!? Nc4+-) 14...ed5 15.Qe2 Re8 16.hg5 (better 16.Kd1+-) 16...Qg7?? (better 16...Qg5 17.Be4 de4-+) 17.Qh5?? (17.Ra2 Qg5 18.f4 (18.Bd5 Qc1 19.Qd1 Nd3 20.Kf1 Qd1 21.Kg2 Qg4 22.Kh2 Qf4 23.Kg2 Qf2) 18...Qf4 19.Kd1+= (19.Bd5 Qc1 20.Kf2 Ng4 21.Kg3 Re2 22.Ne2 Qe3 23.Bf3 Qf2 24.Kf4 Ne7 25.Rh7 Ng6 26.Kg5 Qe3 27.Kh5 Qe5 28.Kg6 Qf6 29.Kh5 Qf5 30.Kh4 Qh7 31.Kg5 Qh6)) 17...Nd3 (17...Nf3! 18.Kd1 Re1) 18.Kd2-+ Qa1?? (better 18...Nf4 19.Qd1 Ng2-+ (19...Qa1?! 20.Bf3-+)) 19.Kd3?? (19.Bh3 Rd8 20.Kd3 Qb1 21.Bd7 Rd7=) 19...Qb1 (19...Bb5 20.c4 dc4 21.Kc2 Ba4 22.Kc1 Re1 23.Kd2 Qb2 24.Ke1 Qc1 25.Ke2 Bd1 26.Ke1 Bh5) 20.Nf3?? (20.Bh3 Rd8 21.Bd7 Rd7 22.Ne2+=) 20...Qb2 (20...Bf5 21.Kd4 Qb2 22.c3 Re4 23.Kc5 Qc3 24.Kb5 Qc6 25.Ka5 Qa6) 21.Nd4 Qa3 22.c3 Qa6 23.Kd2 Qa2 24.Nc2 Ba4 (24...Rf8 25.Bh3 Rf2 26.Ke3=+) 25.Rc1 (25.Bh3 Kb8 26.Bf5 Qc4=) 25...Bb5 (25...Rf8 26.Bf3 Ne7=+) 26.g6 (26.Ra1 Qc4 A) 27.Ra7?? Kb8 28.Ra5 Re2 29.Kc1 Qd3 (worse 29...Qc3 30.Qe2 Be2 31.Bd5-+) 30.Qe2 Qe2 31.Bd5 Ne7-+; B) 27.Bf1 Qf4 28.Kd1=+) 26...hg6-+ 27.Qd5 (27.Qg6 Qc4 28.Nd4 Re2 29.Kd1 Ba4 30.Rc2 Re8-/+) 27...Re2 (27...Qd5 28.Bd5 Rd8 29.Ne3-+) 28.Kd1 Qd5 29.Bd5 Nf6 30.c4 Nd5?? (30...Rf2 31.Bb7 Kb7 32.cb5-+) 31.cd5?? (better 31.Ke2 Bc4 32.Kd2=) 31...Rf2-+ 32.Nd4 a6 (better 32...Rf1!? 33.Kd2 Rc1 34.Kc1-+) 33.Rc2?? (better 33.Rc3-+) 33…Ba4 0-1. mustroll - brutilio (1715), Rated Classical game, lichess.org, 2013.

3.g4 Ne7 4.Bg2 (4.Nf3 h5 5.g5 Nf5=+) 4...Bd7 (4...h5 5.gh5 Nf5 6.Nf3-/+) 5.Nh3 (5.Nf3 h5 6.g5 Nf5=+) 5...Nbc6 (5...h5 6.gh5 Nf5 7.c4-/+) 6.b5=+ Qc8?? (better 6...Na5 7.d3 Bb5-/+) 7.bc6+- bc6 8.Ng5 (8.Nf4 Rb8 9.Nd3 h5+-) 8...Qd8 (8...Rb8 9.Qc1+-) 9.e4 (9.Nc3!? Ng6 10.Nf3 Rb8+-) 9...f6 (9...Ng6 10.Nf3 Rb8 11.Bc3+/-) 10.Nh3+- h6 (better 10...Rb8 11.Bc3 e5+-) 11.Nf4 g5? (11...Rb8 12.Nd3 Ng6+-) 12.Nh5 Ng8 13.h4 (better 13.ed5 cd5 14.Qf3+-) 13...f5 (13...Rb8 14.Bc3 e5 15.hg5 d4+-) 14.Bh8 Nf6 (14...fe4 15.d3 e3+-) 15.Bf6 (15.Nf6!? Kf7 16.gf5 Bc5 17.Qh5 Ke7+-) 15...Qf6 16.Nf6 (16.Nf6 Ke7 17.e5 gh4 18.gf5+-) 1-0. Lance5500 (2750) – azimlisoytari, lichess.org, 2016.

3.Bg7?? Nf6?? 4.Bh8 Bh6 5.Bf6 (5.Nf3 Bf8 6.a3 Bd6+-) 5...Qf6 6.d4 c5 (6...e5 7.de5 Qe5 8.c3+-) 7.e3 (7.bc5 Nc6 8.e3 e5+-) 7...Nc6 (7...cb4 8.c4+-) 8.bc5 b6 (8...e5 9.Nf3+-) 9.Bb5 Bd7 10.Bc6 Bc6 11.cb6 ab6 12.Nf3 Ra3 (12...Qg6 13.0-0 Bb5 14.Re1+-) 13.Nbd2 (better 13.Na3 Bf8 14.Ne5 Ba4+-) 13...Rc3 14.Ne5 (better 14.Qb1 Bd7 15.Qb2+-) 14...Rc2 (14...Be3 15.Ng4 (15.fe3?! Re3 16.Qe2 Qh4 17.Kd1 Re2 18.Ke2 Bb5 19.Kd1 Qd4+-) 15...Bf2 16.Nf2 Qd4 17.Rb1 Re3 18.Kf1+-) 15.Ndf3 (better 15.Qc2 Bd7 16.Qc7 Qe7 17.Qb8 Qd8 18.Qd8 Kd8 19.Nf7 Ke7 20.Nh6 Ba4+-) 15...Rc1 (15...Ba4+-) 16.Qc1 Be3 17.Qc6 Kf8 18.Nd7 Kg7 19.Nf6 Kf6 20.fe3 Kf5 (20...Kg6 21.Ne5 Kf5 22.Qc7 Ke4 23.Qf7 Ke3 24.Rd1 b5 25.Qf3) 21.Ne5 (21.Qc7 Kf6 22.Ne5 Kg5 23.h4 Kh6 24.Qf7 b5 25.Ng4) 21...Ke4 (21...Kg5 22.Nf7 Kf6 23.Rf1 Kg7 24.Qe6 b5 25.Qe5 Kg6 26.Qg5) 22.0-0 Ke3 23.Qc3 Ke4 24.Qd3 (24.Rae1) 1–0. FeegLood (2850) – Adamarm (1760), lichess.org, 2016.

3.h3 Bb4?? 4.Bg7 Qg5 5.Bh8 Nf6 6.Bf6 (6.Nf3!? Qg6+-) 6...Qf6 7.c3 Bc5 (7...Bd6+-) 8.Qa4 (better 8.d4 Bd6 9.e3+-) 8...Bd7-+ 9.Qb3? (9.Qd7 Nd7 10.e3 Qg6-+) 9...Qf2 10.Kd1 Qf1 11.Kc2 Qf5 (better 11...Bc6 12.d4 Bd6-+ (worse 12...Qg2 13.dc5 Qh1 14.Nd2-+)) 12.d3?? (12.Kc1 Nc6 13.Nf3 Na5=) 12...Bc6?? (better 12...Qf1 13.Kb2 Bg1 14.Qb7 Qe2 15.Kb3 Bc6 16.Qc8 Ke7 17.Qc7 Bd7 18.Rg1 Na6-+ (18...Qd3?! 19.Qc5 Ke8 20.Qd4=)) 13.Nf3= Qf4 (better 13...e5=) 14.Nbd2?? (better 14.d4=) 14...Ba4-+ 15.e3 (15.e4 Bb3 16.ab3 c6-+) 15...Bb3 (15...Be3 16.Rhe1-+) 16.Nb3 (16.ab3 Be3 17.Ra4 Qf6-+) 16...Be3 17.Rab1 (17.Rae1 Qg3 18.Re2 Nd7-+) 17...Qa4 (17...Qg3 18.Nbd2-+) 18.Rhf1 (18.Rhe1 Bf4-+) 18...Qa2 19.Rb2 Qa4 20.Ne5 (20.Re1 Qf4-+) 20...f5 (better 20...Nd7!? 21.Nd7 Qd7 22.d4-+) 21.d4 Nc6 (21...Ke7!? 22.g4 Nc6 23.Ra1-+) 22.Ra1 Qb5 23.Nd3 (23.Nc5 Qe2 24.Kb3-+) 23...Ne7 (better 23...Qc4 24.Ra3 0-0-0-+) 24.Nbc5 Qc6 (better 24...Qc4!? 25.Rb4 b6 26.Rc4 dc4 27.Ne6 cd3 28.Kd3-+) 25.Ne5 Qd6 26.Nb7 Qe5! 27.de5 Nc6 28.Na5 (28.Ra6 Kd7 29.Kd1 Bb6-+ (worse 29...Ne5 30.Re2 Nc4 31.Na5 Na5 32.Re3-+)) 28...Ne5 29.Rab1 (29.Re1 f4-+) 29...c5 (better 29...Ke7!? 30.Rb8 Rb8 31.Rb8-+) 30.Rb8 (30.Rb7 Nd7-/+) 30...Rb8-+ 31.Rb8 Kf7 32.Rb7 Kg6 (32...Kf6 33.Ra7 h6 34.c4-/+) 33.Ra7 d4 (33...h6 34.Nb7 Nf7 35.Ra6-/+) 34.Re7 d3 35.Kd1 Kf6 36.Rh7 c4 (36...Nf7 37.Nc4 Bf4 38.Nb2=) 37.Rh4 (37.Rb7!?+=) 37...Kg5= 38.Rh8 Ng6 (38...Bb6 39.Nb7 Kf4+=) 39.Rc8 (39.Rg8 Bf4+-) 39...Ne5 (39...Ne7 40.Rc4 e5 41.Nc6+-) 40.Nc4 Nc4 41.Rc4 e5 42.Rc5?? (42.g4 e4+-) 42...e4 (42...Bc5 43.g3 e4-+) 43.Rd5+- Kf4 (43...Kf6!?+-) 44.c4+- Kg5? (44...Bg1 45.c5+-) 45.c5 (better 45.g4!? Kh4 46.Rf5 Bb6+-) 45...Kf4 46.c6 (better 46.g3 Kg3 47.Rf5+-) 46...Kg3?? (46...Bb6+-) 47.c7 Bf2 48.c8Q e3 49.Qg8 (49.Rd3 Kh2 50.Qf5 Bh4 51.Re3 Be7 52.Qf4 Kg1 53.Re1 Kg2 54.Re2 Kg1 55.Qg3 Kf1 56.Qf2) 49...Kh2 50.Rf5 (50.Rd3 Kg1 51.Ke2 Kh1 52.Rd1 Bg1 53.h4 Kh2 54.Kf3 Bf2 55.Qb8 f4 56.Qf4 Bg3 57.Qg3) 50...e2-/+ 51.Kd2 e1Q 52.Kd3 Qb1 53.Ke2 (53.Kd2 Qb2 54.Kd3 Qd4 55.Kc2 Qe4 56.Kd2 Be3 57.Kc3 Qd4 58.Kb3 Qd3 59.Kb4 Qf5-/+) 53...Qf5 (53...Qc2 54.Kf3 Qf5 55.Ke2-/+) 54.Qg4 Qe5?? (better 54...Qc2 55.Kf3 Be1 56.Qf4 Kg1 57.Qd4 Kf1-/+) 55.Kf3?? (better 55.Kf2 Qc5 56.Kf3 Qc3 57.Ke4 Qc4 58.Kf5 Qc5 59.Kg6 Qc6 60.Kg7 Qc3 61.Kh7+-) 55…Qe3 0–1. adabriwala – robotikempire (1705), lichess.org, 2019.

3.h3 c5 4.bc5= Bc5 (4...Qa5 A) 5.Nf3 f6 (5...Nf6 6.Bc3 Qc5 7.Bf6 gf6 8.e3 Nc6; 5...Nd7 6.Nc3 Nc5 7.e3 Nf6 8.Be2 Be7; 5...Nc6 6.a3 Nf6 7.Bc3 Qc5 8.Bf6 gf6) 6.Nc3 Bc5 7.e3 Ne7 8.Nb5 a6; B) 5.e3= Nd7 (5...Nf6 6.Bf6 gf6 7.Nc3 Nc6 8.Rb1 Qc5; 5...Nc6 6.Nf3 Nf6 7.c4 dc4 8.Bc4 Qc5) 6.Nc3 Nc5 7.Nf3 Nf6 8.Be2 Be7; 4...Nf6 5.d4 b6 6.cb6 Qb6 7.Bc1 Bd6 8.e3 Ba6) 5.Bg7+= Bf2?? (better is 5...Nf6 6.e3 Rg8 7.Bf6 Qf6+= 8.Nc3 a6; 5...Qb6 6.e3 d4 7.Qc1 Nc6 8.Bh8 e5) 6.Kf2+- Qb6 (6...Nf6 7.Nc3 Rg8 8.Bf6 Qf6 9.Nf3 Nd7+-) 7.e3 e5 (7...Nf6 8.Bh8 Ne4 9.Ke1+-) 8.Bh8 d4 (8...Nf6 9.Ke1+-) 9.Na3 de3 10.de3 Qh6 (10...Nf6 11.Qd3+-) 11.Nb5 Na6 12.Nd6 Kf8 13.Ba6 Qh4 14.Kf1 ba6 15.Qd5 Be6 16.Qa8 Ke7 17.Rd1 Nf6 18.Nf5! Bf5 (18...Bf5 19.Qd8) 19.Qd8 Ke6 20.Qd6 1–0. pereira – ubfq, internet, 2009.

3.h3 Bd7 4.e3 a6 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+-) 5.Nf3 Bb4?? (better is 5...Nf6 6.a3 c5=) 6.Bg7+- Nf6 7.Bh8 Nc6 8.a3 Be7 9.Bf6 (9.d4 Bd6+-) 9...Bf6 10.d4 e5 11.c3 e4 12.Ne5! Ne5 (12...Ne5 13.de5 Combination; 12...Be5 13.de5 Combination) 13.de5 Be5 14.Qh5 (better is 14.Qd5 Qf6 15.Qe4+- (15.Qb7?! Bc3 16.Kd1 Rd8 17.Qe4 Kf8+=)) 14...Qf6 15.Ra2 0-0-0 16.g4?? (better is 16.Rd2+-) 16...Bc3= 17.Nc3 Qc3 18.Rd2 Qa3?? (better is 18...Qc1 19.Rd1 Qc3 20.Rd2 Qc1 21.Rd1 Qc3 22.Rd2=) 19.Be2 (19.Rd5?? Qc3 20.Rd2 Bb5-+) 19...Ba4 (better is 19...Qa1 20.Bd1 Be6+-) 20.0-0 Be8 (20...Qd6 21.Ra1 Bc6 22.Qf7+-) 21.Qh7 (21.Rd5 Rd5 22.Qd5 Qe7+-) 21...Qb4 (21...Qd6 22.Rfd1 Qe5 23.Rc1+-) 22.Rfd1 (22.Qf5 Bd7 23.Qd5 c6+-) 22...Qe7 (22...c6 23.Qf5 Rd7 24.g5+-) 23.Qf5 (23.Rd5 Rd6+-) 23...Bd7 (23...Qe6 24.Rd5 Rd5 25.Rd5+-) 24.Qd5 Qe6 (24...c6 25.Qb3 a5+-) 25.Qe6 fe6 (25...Be6?? 26.Rd8) 26.h4 c6 (26...c5 27.h5 c4 28.Bc4+-) 27.g5 e5 (27...b5 28.Bg4 Kc7 29.g6+-) 28.h5 b5 (28...Rg8 29.Rd7 Rg5 30.Kf1+-) 29.g6 Kc7 30.g7 a5 31.Rd7! Rd7 32.Rd7 Kd7 33.g8Q Kc7 34.h6 Kb6 35.h7 a4 (35...Kb7 36.h8Q Kb6 37.Qb8 Kc5 38.Qhf8 Kd5 39.Qbd6) 36.h8Q Ka5 (36...c5 37.Qb8 Kc6 38.Bb5 Kd5 39.Qhe5) 37.Qa8 (37.Qd8 Kb4 38.Qd2 Ka3 39.Qg8 b4 40.Qga2) 37...Kb4 38.Qe5 c5 (38...a3 39.Qe4 Kc3 40.Qd3 Kb2 41.Qaa3) 39.Qb2 1–0. ChessNo1 – Tricky Rabbitt, ChessWorld.net, 2005.

3.h3 f6 4.b5= e5 (4...Bd6 5.Nf3=) 5.Nf3 (5.e4 de4 6.Nc3 f5 7.Ne4 fe4 8.Qh5 Kd7 9.Qf5 Ke8 10.Qh5 Kd7 11.Qf5 Ke8 12.Qh5 Kd7=) 5...Bd7 (5...Be6!?=) 6.e3 (6.e4 Ne7 7.Nc3 d4+=) 6...c6 (6...Ne7 7.Nc3+=) 7.Nc3 Qa5 8.Nh4 g6 9.a3 (9.Nf3 Bd6+=) 9...cb5 (better is 9...Bd6!?+=) 10.Nd5+- Nc6 11.Bc3 Qd8 12.Bb5 a6 (better is 12...Be6 13.Nb4 Bb4 14.Bc6 bc6 15.ab4 Ne7+/–) 13.Bc4 b5 14.Bb3 a5 15.a4 b4 16.Bb2 Rc8 17.0-0 Nh6 18.f4 Bg7 19.Qe2 1–0. pierre – michko, internet, 2009.

3.Nh3 Qd6 4.a3 Bd7 (4...e5 5.Ng5=+) 5.g3 (5.e3 e5=) 5...Bb5 (5...a5 6.ba5 e5 7.d4 ed4 8.Qd4=+) 6.Bg2 Nc6 (6...Bc6 7.Nc3=) 7.0-0 (7.a4 Be2 8.Qe2 Qb4+-) 7...0-0-0 (better is 7...Ne5=) 8.a4+- Bc4 (8...Be2 9.Qe2 Qb4 10.Bc3+-) 9.d3 (better is 9.b5!?+-) 9...Qb4+/– 10.Bc3 Qb6 (10...Qc5 11.dc4 Qc4 12.Qd3+/–) 11.dc4 dc4 12.Nd2 f5? (better is 12...Nf6+-) 13.Rb1 (13.Nc4?! Qc5 14.Qb1 Qc4=) 13...Qa6 14.Ng5 Nh6 (14...Rd7 15.Ne6 Nf6 16.e3+-) 15.Ne6 (15…Rd7 16.e3+-) 1–0. Wall,Bill – Digga, internet, 2002.

3.Nh3 Nf6 4.a3=+.

3.h4 Bb4?? 4.Bg7 Nc6 5.Bh8 f6 6.e3 Bd7 7.Qh5 Ke7 8.Qh7 Kd6 9.c3 Ba5 10.Na3 Nce7 11.Rb1 b6 (11...Bb6 12.Nb5 Bb5 13.Bb5+-) 12.Qg7 (12.Qd3 Kc6+-) 12...c5 (12...Nf5 13.Qg6 Nge7 14.Bf6 Ng6 15.Bd8 Rd8 16.Nf3+-) 13.h5 (13.e4 Bc6+-) 13...Nf5 14.Qg6 Ngh6 (14...Qf8 15.g4 Nge7 16.Qf6 Qh8 17.Qh8 Rh8 18.gf5 Nf5 19.Nb5 Bb5 20.Bb5+-) 15.Bf6 Qg8 16.Qg8 Rg8 17.Bh4 (better 17.Nf3 Ng4 18.Bg5 e5+-) 17...d4 (17...Rg4 18.Nf3+-) 18.Nc4 Kd5 19.Na5 ba5 20.Rb7 Bc6 21.Ra7 dc3 22.dc3 Rb8 (22...Kd6 23.Ra5 Rb8 24.Bd3 Bg2 25.Ra6 Kd7 26.Rh2+-) 23.Bd3 c4 24.Bc2 (24.Ra5 Kd6 25.Bf5 Nf5+-) 24...Rb2 (24...Kd6 25.Ra6 Kc7 26.Ra5+-) 25.Ra5 Kd6 26.Kd1 Bg2 27.Rh2 Bf3 (27...Bc6+-) 28.Nf3 Ng4 29.Rg2 Nf6 30.Bf6 Ne3 31.fe3 Ra2 (31...Rc2 32.Ra6 Kd5 33.Kc2 e5 34.a4 Ke4 35.Nd2 Kd5 36.e4 Kc5 37.Be7) 1–0. beatmeeasy (1925) – RokWulf (1905), lichess.org, 2020.

3.h4 c6 4.Nf3 f5 5.Ne5 Nf6 (5...Bb4? 6.Nc6 Nc6 7.Bg7+-) 6.Nd3 Bd6 7.Na3 0-0 8.h5 e5 9.Be5 Be5 10.Ne5 Ne4 (10...Qe7!? 11.Nd3 a5-/+) 11.Nd3 Qg5 12.e3 Nd7 (12...a5 13.h6=+) 13.Qf3 (13.c4!?+=) 13...Qf6 14.Rb1 Ne5 (14...a5 15.ba5 Ra5 16.Rb3-/+) 15.Ne5+= Qe5 16.Qf4 White prepares h6 16...Qf6 17.h6 g5 18.Qf3 (18.Qc7 Rf7 19.Qh2 a5=+) 18...f4 19.ef4 gf4 (19...g4 20.Qe3=) 20.Bd3 Kh8 21.Kd1?? (21.Be4 Re8+=) 21...Qe5?? (21...Bg4 22.Be4 Bf3 23.Bf3-+) 22.Re1?? (22.Kc1 Nf6 23.Qe2 Qd6=) 22...Bf5?? (better 22...Bg4! 23.Be4 Qg5 24.Qg4 Qg4 25.Bf3 Qh4-+) 23.Be4 (23.Kc1 b5 24.Be4 a5=) 23...Be4 (23...de4 24.g4 Rae8=) 24.Qc3 (24.Qb3 Rae8 25.d3=+) 24...Qc3=+ 25.dc3 Bg2 26.Re7 f3 (better 26...b6!?=+) 27.Rb7= Rf6 28.b5 cb5 29.R1b5 Re8 (29...Rh6 30.Rd5 Rh1 31.Kd2+=) 30.Rd5 Rh6 31.Ra7 (31.Kd2 Re2 32.Kd3 Bf1+=) 31...Rh1= 32.Kd2 Re2 33.Kd3 Rd1 34.Kc4 Re4?? (better 34...Rd5 35.Ra8 Kg7 36.Kd5 Rf2-+) 35.Rd4+- Red4 36.cd4 Rd2 37.Nb5 (better 37.d5!?+-) 37...Rc2= 38.Kd3 Rf2 39.Nd6 Bf1?? (better 39...Rb2 40.Nf7 Kg8 41.Nh6 Kf8=+) 40.Ke3+- Re2 41.Kf3 h5 42.Nf5 Rd2 43.Kf4 (43.a4 Bd3 44.Ke3 Rd1+-) 43...Be2 (43...h4!? 44.Nh4 Rd4 45.Kg5+-) 44.Kg5 Bg4? (44...Bd3 45.Nd6 Kg8 46.Kh6+-) 45.Ra8 (better 45.Ne7 Rd4 46.Kh6 Rd6 47.Ng6 Rg6 48.Kg6+-) 45...Kh7 46.Ra7 Kg8 (46...Kh8 47.Ne7 Rd4+-) 47.Nh6+- Kf8 48.Ng4 hg4 49.Kg4 Rd4 50.Kf5 Ke8 51.Ke6 Kd8 52.Ke5 Rd1 53.a4 Kc8 54.Ra8 (54.Ke4!?+-) 54...Kb7+= 55.Ra5 Rb1 56.Kd5 Rb4 57.Kc5 Rb1 (57...Re4 58.Kd6=) 58.Rb5 (better 58.Kc4!?+-) 58...Rb5= 59.ab5 Ka7?? (better 59...Kc7=) 60.Kc6+- Kb8 61.b6 (better 61.Kb6+-) 61...Ka8 62.Kc7 ½–½. beatmeeasy (1865) – Realeboha (1905), lichess.org, 2020.

3.h4 Bd7 4.Nf3 c6 5.g4 a5 6.ba5 Ra5 7.g5 Na6 8.Bc3 Nc5 (better 8...Ra4!?=) 9.Ba5+- Qa5 10.Nd4 Qb6 11.c3 Qb2 12.Qc2?? (12.Nc2+=) 12...Qb6 (better 12...Qa1 13.Bg2 b5-+) 13.a4 Qc7 14.Nf3 Ne7 15.a5 Nf5 16.d4 (16.Bh3!?+-) 16...Ne4 17.Nbd2 (17.Rh3+-) 17...Nd2? (better 17...Nf2!? 18.Rg1 Ne3=) 18.Nd2 c5 19.Qb2 cd4 20.cd4 Bd6 21.e3 0-0 22.h5 Rc8 23.g6! e5 (23...fg6 24.hg6 Combination; 23...hg6 24.hg6 Combination) 24.gf7 Kf7 25.Qb3 Be6 (better 25...ed4!? 26.Bg2 Qc3 27.Bd5 Ke7 28.Qc3 dc3+- (28...Rc3? 29.e4+-)) 26.Nf3 ed4 27.ed4 (better 27.Ng5!? Kf6 28.Ne6 (28.Nh7?! Ke7 29.Ng5 de3 30.fe3 Be5 31.Ne6 Ke6=) 28...Ke6 29.e4 Qc3 30.Qc3 dc3 31.ef5 Kf6 32.Bd3+-) 27...Qe7 28.Be2 Bd7 (28...Kg8 29.Rg1+-) 29.Kf1 (better 29.Qd5 Be6 30.Qe4 Bb4 31.Kf1+-) 29...Qf6? (better 29...Bc6+-) 30.Qd5+- Be6 31.Qb7 Be7 32.Ne5 (32.Qe4!? Rd8 33.Qf4 Kg8+-) 32...Kg8 33.a6?? (better 33.Qf3 Bc5 34.dc5 Rc5 35.a6 Qe5 36.Rd1+-) 33...Ne3-/+ 34.Ke1 (better 34.Kg1 Qg5 35.Kh2-/+) 34...Nc2?? (better 34...Bb4! 35.Qb4 Nc2 36.Kf1 Nb4-+) 35.Kf1= Ne3 (35...Na1 36.a7 Rc1 37.Kg2 Qg5 38.Bg4 Bg4 39.a8Q Bc8 40.Kf3 Qf5 41.Ke2 Rc2 42.Kd1 Rc1 43.Ke2 Rc2 44.Kd1 Rc1 45.Ke2=) 36.Ke1 Nc2 37.Kd2?? (better 37.Kf1 Ne3=) 37...Na1 (37...Qf4 38.Kd1 Qd4 39.Bd3 Qa1 40.Ke2 Qe5 41.Qe4 Nd4 42.Ke3 Bg5 43.f4 Bf4 44.Kf2 Bg3 45.Kg1 Bh2 46.Rh2 Rc1 47.Kf2 Qh2 48.Ke3 Qg1 49.Kd2 Nb3 50.Ke2 Re1 51.Kf3 Nd2 52.Kf4 Qh2 53.Kg5 Qg3 54.Qg4 Qg4) 38.a7?? (38.Qc8 Bc8 39.Bc4 Kf8 40.Ra1 Qf2 41.Kc3 Qe3 42.Bd3 Bb4 43.Kb3 Be6 44.d5 Bd5 45.Kb4 Qd4 46.Bc4 Bc4 47.Nc4 Qa1 48.Kb5-+) 38...Qf4 39.Ke1 Qc1 (39...Rc1 40.Bd1 Nc2 41.Ke2 Nd4 42.Kf1 Rd1 43.Kg2 Qg5 44.Kh2 Qh5 45.Kg2 Qh1 46.Kg3 Ne2) 40.Bd1-+ Nc2 (40...Nc2 41.Ke2 Nd4 42.Kf1 Qd1 43.Kg2 Qa4-+) 0–1. beatmeeasy (1880) – Daniell1212 (1810), lichess.org, 2021.

3.h4 Nd7 4.Nf3 Ngf6 5.c3 c5 6.bc5 Bc5 7.d4 Bd6 8.Nbd2 0-0 9.a4 (9.e3 e5=+) 9...Ne4 (9...e5 10.de5 Ne5 11.Ne5 Be5 12.e3-/+) 10.Ne4=+ de4 11.Ng5 (11.Nd2 e3 12.Nc4 ef2 13.Kf2 Qf6 14.Kg1 Bg3=+) 11...Qb6 (11...Nf6 12.Qc2 Qb6 13.Rb1-/+) 12.Qc2 (better 12.Ne4 Qb2 13.Rb1=) 12...e3?? (12...Nf6!?-/+) 13.fe3 (13.Qh7) 13...Bg3 (13...Nf6 14.a5 Qc6 15.Ba3=+) 14.Kd2= Nf6 15.Ba3 Re8 16.Bc5 (16.Rh3 Qc7=) 16...Qd8 (16...Qc6 17.e4 h6 18.e5 Bh4 A) 19.Rh4 hg5 20.Rh3 Ne4 21.Ke1 f5= (worse 21...Nc5 22.Qh7 Kf8 23.dc5+-); B) 19.Nf7 Ne4 20.Ke3 Bf2 21.Kf4-/+) 17.Rh3 (17.Ne4 Ne4 18.Qe4 Bc7=) 17...Bc7=+ 18.h5? (18.Rf3 h6 19.Rf6 hg5-/+) 18...e5?? (18...Qd5 19.Nf3 Ne4 20.Kc1 Nc5 21.dc5-+) 19.Rh1?? (better 19.Qb3 Nd5 20.Rf3-/+) 19...ed4-+ 20.cd4 (20.Bd4 h6 21.Nf3 Ng4-+) 20...b6 21.Bb4 Nd5?? (better 21...Bf4! 22.ef4 Qd4 23.Ke1 Qa1 (worse 23...Qb4 24.Qd2 Qb3 25.Kf2-+) 24.Qd1 Qb2-+) 22.Qh7 1–0. beatmeeasy (1885) – ChessModer (1790), lichess.org, 2020.

3.h4 f6 4.c3 Bd7 5.h5 Ne7 6.Qc2 e5 7.e3 Bf5 8.d3 Nbc6 9.Nf3 Qd7 10.Nh4 Be6 11.a4 0-0-0 12.a5 a6 13.d4 e4 (13...Na7 14.de5 fe5 15.Nd2=+) 14.g3 (14.b5 Nb8 15.c4 g5 16.hg6 hg6 17.ba6 ba6 18.cd5 Bd5-/+) 14...Nf5 (14...Na7!?-/+) 15.Nf5= Bf5 16.b5 Nb8 17.ba6 Na6 18.Nd2 c5 (18...Bg4 19.Rb1+=) 19.Ba6 (19.c4 Qc6+=) 19...ba6 20.dc5 Bc5 21.Nb3 Ba7 (21...Qc7 22.h6 g5 23.Qe2=) 22.Nd4 Be6 23.Rh4 (23.Qe2 Kb7+=) 23...Bf7 (23...Rde8 24.Rc1 Kd8 25.Ne6 Re6 26.c4+=) 24.c4 Qc7 25.Rc1 dc4 (25...Qc4?? 26.Qa4 Qc1 27.Bc1+-) 26.Qe4 Qa5? (better 26...Bd5 27.Qf5 Qd7=) 27.Bc3+- Qd5 28.Qg4 Kb7 29.Rb1 Ka8 30.Qg7 Rhe8 31.Kf1 (31.Ra1!? Bd4 32.Bd4 Qb7 33.Qf6 Be6+-) 31...Rg8 32.Qf6 Rd6 33.Qe7 Re8 34.Qc7 Bb8? (better 34...Rd7!? 35.Qf4 Bh5+-) 35.Rb8!+- Rb8 36.e4 Qb7?? (36...Rb1 37.Kg2 Qe5 38.Qf7 Rd4 39.Qh7 Rb7+-) 37.Qd6 Qb1 38.Kg2 Be8 (38...Qb6 39.Qd7 Qb7+-) 39.Qa6 1–0. beatmeeasy (1960) – Antoniosorocaba (2005), lichess.org, 2021.

4.e3 de3 5.de3 Qd1 6.Kd1 Bd7 7.Nf3 Bc6 8.Bc4 Bf3 9.gf3 a6 10.Nc3 b5 11.Bb3 Nf6 12.Kd2 Bd6 13.Rad1 0-0 14.h3 Nc6 15.e4 Rad8 16.Kc1 Ne5?? (better is 16...Bf4 17.Kb1 Be5+=) 17.f4+/– Nf3 18.e5 Be5 (better is 18...Ne5!? 19.fe5 Be5+/–) 19.fe5+- Ne5 (19...Nd7 20.a4 c6 21.Ne4+-) 20.f4 (better is 20.Nb5 Nd3 21.cd3 ab5 22.Rhg1+-) 20...Ng6+/– 21.Rd8 Rd8 22.h4 (better is 22.Rf1+/–) 22...Nf4= 23.a4 ba4 24.Ba4 Rd4 25.Ba3 (25.Na2!? Ne2 26.Kb1+=) 25...N4d5 26.Nd5 Nd5 (worse is 26...ed5 27.Bc6+/–; worse is 26...Rd5 27.Bb2+=) 27.h5 (27.Bb3 Nb4 28.c3 Nd3 29.Kc2 Nf2=) 27...a5 28.Bc6 ab4 29.Bb2 Rc4 30.Rg1? (better is 30.Ba4-/+) 30...Rc6-+ 31.Rg7 Kh8 (better is 31...Kf8 32.Rh7 b3 33.Rh8 Ke7-+) 32.Rf7-/+ Kg8 33.Rg7 Kf8 34.Rh7 Kg8?? (better is 34...b3 35.Rh8 Ke7-/+) 35.Rg7+/– Kf8 36.h6 Nc3? (better is 36...e5 37.Rd7 Nf6+/–) 37.Kd2?? (better is 37.Rg5 Na2 38.Kd2 Rd6 39.Ke3+-) 37...e5 (37...Rd6 38.Ke1 Rd1 39.Kf2 Rd2 40.Kg3 Rc2+=) 38.Kd3? (38.Bc3 Rc3 39.Rg5 Rh3+=) 38...Rh6 (better is 38...e4 39.Kd4 Rh6-+) 39.Rc7+= Nb5 40.Rc8 Ke7 41.Be5 Re6 42.Ke4?? (better is 42.Bb2=) 42...Nd6-+ 43.Kd4 Nc8 44.Bg3 Rc6 45.Bh4 Ke6 46.Bg3 (46.Be1-+) 46...Rc2 47.Kd3 (47.Be1 b3 48.Bc3 Nd6-+) 47...b3 (better is 47...Rc3 48.Ke2 b3-+) 48.Be5 (48.Be1-+) 48...Ke5 49.Ke3 b2 50.Kd3 (50.Kf3 b1Q 51.Kg3 Qg1 52.Kf3 Qg2 53.Ke3 Qe4) 50...b1Q 0–1. pieeater – The Monopoly Guy, ChessWorld.net, 2011.

4.e3 de3 5.fe3 Nf6 6.Qf3 Be7 7.Bb5 c6 8.Bd3 0-0 9.Nh3 Nbd7 10.Nc3 (10.0-0 c5=) 10...e5 (better 10...Ne5!? 11.Qe2 Nd3 12.Qd3 Qd3 13.cd3 a5-/+) 11.Ne4= Ne4 12.Qe4 g6 (12...f5 13.Qf3=) 13.Rf1 (13.Be5? Ne5 14.Nf2 Bf6-+) 13...Nf6 (better 13...Bd6!?=) 14.Qe5+/- Be6? (better 14...Bh3 15.gh3 Kg7+-) 15.Rf6+- Bf6 16.Qf6 Qf6 17.Bf6 Rfe8 (17...Bh3 18.gh3 Rfc8 19.Rb1+-) 18.Rd1 (18.Nf4!? a5+-) 18...Bh3 19.gh3 Re6 20.Bg5 Re5 21.Bh6 Rh5 22.Bf4 Rh3 23.Kf2 Re8 24.Rg1 Rh5 25.Be2 Rd5 26.Bd3 c5?? (26...Rh5 27.c4 Kf8+-) 27.b5?? (better 27.e4 Rh5 28.Kg3+-) 27...c4+/- 28.Be4?? (28.Bc4!? Rd2 29.Kf3 Rc2 30.Bd5+/-) 28...Rd2?? (better 28...Re4 29.b6 Rd2 30.Kf3 Rf4 31.ef4 ab6-+) 29.Kf3+= b6 (29...Re7 30.c3+=) 30.h4 f5? (30...Rf8 31.Rg2 Rg2 32.Kg2+/-) 31.Bc6 (31.Bf5!? Kf7 32.Be4 c3+-) 31...Rc8 32.c3 (32.e4 Rc2 33.ef5 Kf7 34.fg6 hg6 35.Bd5 Kf6+-) 32...Rd3 33.Be5 a6? (33...Kf7!?+/-) 34.Bd4 (better 34.ba6!? Rc6 35.a7 Rc8+-) 34...ab5 35.Bb5 Kf7 36.a4 (36.Bb6?! Rc3 37.a4 Rb3+=) 36...h6 (36...Rd2 37.Bb6 Rh2 38.Kg3+-) 37.Kf4 (37.Ke2 Rd4 38.cd4 c3+-) 37...Rd2 (37...h5 38.Kg5 Rd2 39.Kh6 Rd4 40.ed4 (40.cd4?! c3 41.Bd3 Rh8 42.Kg5 Re8+-) 40...Rh8 41.Kg5+-) 38.Ke5 Rh2 39.Kd6 Rh4 40.Kd7 Re8 (40...Rc5+-) 41.Bc4 Kf8 42.Bb6 (better 42.Rg6 Re7 43.Kd6+-) 42...Rc4=+ 43.a5 (43.Rg6 A) 43...Rc3 A1) 44.Rh6?! Re7 45.Kd6 Rd3 (45...Rce3? 46.Be3 Re3 47.Rf6 Ke8 48.Rf5+-; worse 45...Ree3 46.Be3 Ra3 47.Rh4 Re3 48.Rf4+-) 46.Kc6 Kg7=; A2) 44.Rf6 Kg7 45.Ke8 (45.Rf5?! Kg6=) 45...Kf6 46.Bd4 Ke6 47.Bc3+-; B) 43...Ra4?! 44.Rh6 Kf7 45.Rh7 Kg6 46.Rh1=+; C) 43...Kf7 44.Rh6 Ra4 (worse 44...Rc3 45.Bd4 Rce3 46.Rf6 Kg8 47.Be3+/-) 45.Rh7 Kg6=+) 43...Re7 (43...Rc3?! 44.Rg6 Re7 45.Kd6=) 44.Kd6 g5 (44...Rc3?! 45.Rg6 Rd3 46.Kc6=) 45.Bd4 Kf7 (45...Ra4 46.Bb6-+) 46.a6? (better 46.Rf1=) 46...Re6 47.Kd5 Ra4 48.a7 Ra5 49.Kc4 g4 (49...Re7 50.Rh1 Kg6 51.Rb1 Rc7 52.Kd3-+) 50.Rb1 Re7 (50...Rc6 51.Kd3 Rc7-/+) 51.Rf1? (better 51.Rb5 Ra4 52.Kb3 Raa7 53.Ba7 Ra7 54.Rf5 Kg6 55.Rf2-/+) 51...Kg6-+ 52.Rb1 h5 (52...Rea7 53.Ba7 Ra7 54.Kd3-+) 53.Rb8? (53.Rb6 Kh7 54.Rb5 Ra4 55.Kb3 Rea7 56.Ba7 Ra7 57.Rf5-+) 53...Rea7 54.Ba7 Ra7 55.Rg8 (55.Kd5 h4 56.c4 h3 57.Rb6 Kg5-+) 55...Rg7 56.Ra8 g3 57.Ra1 (57.Kd3 g2 58.Ra1 Kf6 59.Ra6 Kf7-+) 57...h4 58.Kd4 g2 59.e4 fe4 60.Ke4 (60.Ke3 Rf7 61.Rg1 h3-+) 60...Rf7 61.c4 Rf1 (better 61...h3 62.Kd3-+) 62.Ra6 Kh5 63.Ra5 (63.Ra5 Kh6 64.Ra6 Kg5 65.Ra8-+). facebook1 (1655) - sokol88 (1705), Rated Classical game, lichess.org, 2013.

4.Nf3 (--> 1.b4 d5 2.Bb2 d4 3.Nf3 e6 4.a3).

4.Bg7 Be5 5.Be5 f6 6.Bb2 Nd7 7.Nf3 (7.e4 de4 8.Qh5 Ke7+-) 7...Ne7 8.g3 (8.e4 e5+-) 8...c6 (8...e5 9.e3+-) 9.Bg2 b6 (9...e5 10.d4 e4 11.Nfd2+-) 10.0-0 (10.Ng5 Ne5+-) 10...Bb7 11.d3 Qc7 12.c4 0-0-0 (12...e5 13.Nbd2+-) 13.cd5 ed5 14.Nbd2 Ne5 15.Rc1 N7g6 (15...Rhg8 16.Nd4 Qd7 17.Nc6 N7c6 18.b5+-) 16.Nb3 (16.Nd4!? Qd7 17.f4 Ng4+-) 16...Kb8 17.Nbd4 Rhe8 18.b5 (better 18.Nc6!? Nc6 19.b5 Rd6+-) 18...c5 19.Nf5 (19.Qa4 Qd7 20.Ne5 Ne5 21.Nc6 Nc6 22.bc6 Qc6 23.Qc6 Bc6 24.Bf6 Rd6+-) 19...Qd7 20.N5h4 d4 21.Ng6 hg6 22.Ne1 (better 22.Ne5!? fe5 23.Bb7 Kb7+-) 22...Bg2 23.Ng2 (23.Kg2 Rh8 24.Rh1 Qb5+-) 23...Rh8 24.h4 g5 25.f4 gh4 26.fe5 hg3 27.Rf4?? (better 27.Nf4 fe5 28.e4 ef4 29.Rc2=+ (worse 29.Rf4 Rh1 30.Kg2 Qh3 31.Kf3 Rh2 32.Bd4 Qh5 33.Rg4 Rf8 34.Bf6 Rf6 35.Ke3 Qh6 36.Rf4 Qf4)) 27...Qh3 28.Nh4 (28.Rh4 Rh4 29.Nh4 Qh2 30.Kf1 Qh1) 28…Qh2 (28...Qh2 29.Kf1 Qh1) 0-1. black_bishop_88 (2555) - Suleyman_Chess06 (2520), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2)

4.Bg7 Be5 5.Be5 f6 6.Bb2 e5 7.e3 Bd7 (7...Be6 8.d4 Nd7 9.de5 fe5 10.Nf3+-) 8.Qh5 Ke7 (8...Kf8+-) 9.Qh6 (better is 9.Be5 Be6 10.Bb2+-) 9...Nh6-+ 10.Nf3 (10.d4 ed4 11.Bd4 Nc6-+) 10...a6 (10...Bg4 11.Be2-+) 11.Nc3 Nc6 (better is 11...Bg4!? 12.Be2-+) 12.Nd5 Kd6 (12...Ke8 13.e4-+) 13.c4 Be6 (13...Bg4 14.Be2-+) 14.Nc3 (14.d4 e4 15.Nd2 Bf5-+) 14...Qg8 (14...Kd7 15.d4 ed4 16.Nd4 Nd4 17.Rd1-+) 15.Ne4 (15.d4 Bc4 16.de5 Ne5 17.Ne4 Ke7 18.Ne5 fe5 19.Be5 Bf1 20.Bf6 Kf7 21.Kf1 Re8 22.Bh8 Qh8 23.Ng5 Kg6-+) 15...Ke7 16.d3 (16.d4 Qg6 17.Nc3 Qc2-+) 16...Rd8 (16...Nf5 17.Rc1-+) 17.Nc5 Rb8 (17...Bc8 18.b5 ab5 19.cb5-+) 18.h3 (18.b5 Na5-+) 18...Nf5 19.g4 Nd6 20.Bg2 Qg6 (20...e4 21.g5 ef3 22.Bf6 Ke8 23.Bf3-+) 21.Nh4 (21.Nd2 Qe8-+) 21...Qh6 22.Ne6 Ke6 (22...Qh4?! 23.Nc7 h5 24.Na6-+) 23.Bd5 Kd7 24.Nf3 Ne7 (better is 24...Rhe8 25.c5 Nb5 26.Be4-+) 25.0-0-0 (25.g5 fg5 26.Ne5 Kd8 27.Ng4-+) 25...Nd5 26.cd5 Rhe8 27.Nd2 (27.Kd2 e4 28.Ne1 Rbd8-+) 27...Nf7 (27...a5 28.ba5 Qh4 29.Rdf1-+) 28.Ne4 c6 (28...Kc8 29.d4-+) 29.dc6 (29.Nc5 Kd6 30.dc6 Kc6-+ (worse is 30...bc6 31.Na6 Ra8 32.Nc5-+)) 29...Kc6 30.Rd2 Rbc8 31.Rc2 Kb5 (31...Kd7 32.f4-+) 32.Nc3 Kb6 33.Na4 (33.b5 ab5 34.Kd2 Kc6-+) 33...Ka7 34.Nc5 (34.b5 Qh4 35.b6 Ka8-+) 34...Nd6 (34...Rg8 35.Ne4-+) 35.Kb1 (35.Kd2 b6 36.Na4 Rc2 37.Kc2 Rg8-+) 35...Qf8 (better is 35...Qh4!? 36.Rh2-+) 36.Rhc1 Qe7 37.d4 ed4 (37...b6 38.de5 fe5 39.Nd3 Rc2 40.Rc2-+) 38.Bd4 Nb5 (38...Nb5 39.Na6 Nd4 40.Rc8 Qe4 41.Kb2 Rc8 (41...ba6?! 42.Re8 Qe8 43.ed4-+; 41...Ka6?! 42.Re8 Qe8 43.ed4-+) 42.Rc8 Qd3-+) 0–1. DrSub (1615) – tuaku, internet, 2007.

4.Bg7+- Be5 5.Be5 Nf6 6.Nf3 +-.

4.Bg7+- h6 5.Bh8 Kf8 (5...Nd7 6.e3+-) 6.e3 Ne7 (6...Nf6 7.d4+-) 7.Qh5 Kg8 (7...Ng8 8.Nc3+-) 8.Qh6 Qf8 (8...Nf5 9.Qh5+-) 9.Qh5 e5 (9...Nf5 10.Nf3+-) 10.Be5 Be6 (10...Be5 11.Qe5 Qg7 12.Qg7 Kg7+-) 11.Qh8 1–0. lucya (2125) – simple_freek, GameColony.com, 2002.

4.e3 Nf6 5.c4 a5 6.b5 Nbd7 7.a4 (7.d4 c5=) 7...Qd8 8.Nf3 Bb4 9.Be2 0-0 10.0-0 Nc5 11.d4 Nce4 12.c5 b6 13.cb6 cb6 14.Ba3 Bd6 15.Ne5 Bb7 16.Bd6 Nd6 17.Nd2 Rc8 18.Rc1 Rc7 19.Ndf3 Nfe4 20.Bd3 (20.Qb3!?=) 20...f6+= 21.Nc6 Qa8 22.Nd2 Nd2 23.Qd2 Rfc8 24.Qe2 (24.Rc3 Bc6 25.Rfc1 Kh8=) 24...Bc6 25.bc6 Rc6 26.Rb1 Nc4 27.Rb3 Qa7 28.h4 Qe7 29.Rfb1 Rb8 (29...f5 30.h5-/+) 30.g3 Qd6 31.Kg2 e5 32.e4 de4?? (better is 32...ed4 33.Rb5 Ne5 34.Rd5 Qa3+=) 33.Bc4+- Kh8 34.de5 Qe5 35.Bb5 (better is 35.Rb5!? Qe7+-) 35...Rd6 36.Re3 f5 37.Re1 Rbd8 38.Qc2 Rd2 39.Qc6 R2d6 40.Qc7 Qb2 41.R1e2 Qa1 42.Qf7 Qe5 (42...g6 43.f3 Rf6 44.Qb7+-) 43.f3 Rf6 Black prepares f4 44.Qc4 Re6 (44...ef3 45.Rf3 Qb8 46.Qf4+-) 45.Bd7! Rd6 (45...Rd7 46.Qc8 Decoy) 46.fe4 (46.Bc6 Rc8 47.Qb5 Qe6 48.Be4 f4+-) 46...f4 (46...R6d7 47.ef5 Qb8 48.Qe6+=) 47.Rd3 (47.gf4 Qf4 48.Bf5 Qh4+/–) 47...Rd3? (better is 47...f3 48.Kf3 R6d7 49.Rd7 Qf6 50.Kg2 Rd7+=) 48.Qd3+- fg3 49.Rc2 Qf4 50.Bb5 (better is 50.Bg4! Rg8 51.Qf3+-) 50...Qh4+= 51.Qg3?? (better is 51.Qd8! Qd8 52.Ba6=) 51...Qe4-+ 52.Kh3 Qc2 53.Qg5 (53.Qf3-+) 53...Qc3 (53...Qc3 54.Qg3 Qg3 55.Kg3 h5-+) 0–1. Illescas Lopez – Aguilera Quiztke, Malaga–ch, 2004.

4.e3 Nh6 5.c4 (5.Nf3 Nd7=) 5...dc4 (5...Nd7 6.Nf3=) 6.Bc4 Nf5 7.Nc3 Nc6 (7...a5 8.b5=) 8.Nf3+= f6 (8...Nh4 9.Nh4 Qh4 10.Nb5+=) 9.0-0 Ne5 (9...Nd6!? 10.Bb3 e5+=) 10.Ne5 fe5 11.Qh5 (11.Ne4 Nd6 12.Bd3 Qh4+/–) 11...g6 12.Qe2 Bd7 (12...Bg7 13.Ne4+/–) 13.Bb5 (13.Nb5 Bb5 14.Bb5 c6 15.Be5 Bg7 16.Bg7 Ng7+-) 13...0-0-0 (13...Bg7 14.Ne4+=) 14.Bd7 Qd7 15.Rad1 Nh4 (15...Qd3!?+=) 16.Nb5 (better is 16.d4+/–) 16...Kb8?? (better is 16...Bg7+/–) 17.Be5+- Rc8 (17...Bd6 18.Nd6 cd6 19.Bh8 Rh8+-) 18.Bh8 c6 (18...a6 19.Bf6+-) 19.Bf6 (19.Be5 Ka8 20.Nc3 c5+-) 19...Nf5 20.Nd4 e5 (20...Be7 21.Be5 Bd6 22.Nf3+-) 21.Be5 Nd6 22.Bd6 (22.Nf3!? Bg7+-) 22...Qd6 23.Qf3 (23.Nf3 Qe6+-) 23...Qe5 (23...Bg7 24.Ne2 Rf8 25.Qg3+-) 24.Rc1 Bd6 25.Qg3 (25.Qh3 Qf6+-) 25...h5 (25...Qd4 26.ed4 Bg3 27.fg3+-) 26.Qe5 Be5 27.Rc5 (27.Nf3 Bb2 28.Rb1 Bf6+-) 27...Bd6 (27...Bd4 28.ed4 Rd8 29.d5 Rd5 30.Rd5 cd5 31.f4+-) 28.Rc3 (better is 28.Rg5 c5 29.Rg6 Bh2 30.Kh2 cd4+-) 28...b5 (28...Be5 29.Rc4+-) 29.Rfc1 Be5 (29...Rc7 30.Rc6 Kb7 31.Rc7 Bc7 32.Nb5+-) 30.Rc6 (better is 30.Nc6 Rc6 31.Rc6 Bb2 32.Rc8 Kb7 33.R1c7 Kb6+-) 30...Rc6 31.Rc6 (better is 31.Nc6 Kb7 32.Ne5 g5+-) 31...Kb7 32.Rg6 Bd4 33.ed4 h4 34.f4 a6 35.f5 h3 36.f6 a5 (36...Kc7 37.f7 Kc8 38.f8Q Kd7 39.Qf7 Kd8 40.Rg8) 37.f7 hg2 (37...Kc8 38.f8Q Kb7 39.Qe7 Kc8 40.Rg8) 38.f8Q ab4 39.Qf7 Ka8 (39...Kc8 40.Rg8) 40.Rg8 1–0. rommeltdf (1780) – kpratt, net–chess.com, 2002. (=1.a3 d5 2.b4 e6 3.Bb2 Qe7)

4.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 h6).

4.Nf3 a6 5.e3 Nc6 6.c4 Bd7 (6...Nf6 7.Nc3=) 7.d4 (7.cd5 ed5 8.d4 Nf6+=) 7...a5 (7...Nf6 8.Nbd2+=) 8.b5 Nb8 (8...Nce7 9.cd5 Nd5 10.e4+=) 9.Bd3 c6 10.Ne5 f6?? (better is 10...dc4 11.Bc4 Nf6+/–) 11.Ng6 (better is 11.Qh5 Ke7 12.Qf7 Kd6+-) 11...Rh7 (11...dc4 12.Nh8 cd3 13.Qh5 Ke7 14.Ng6 Kf7 15.Ne5 Ke7 16.Qf7 Kd6 17.Nd7 Nd7 18.Qg8+-) 12.Nf8 (12...Kf8 13.Bh7 dc4 14.bc6 Bc6 15.0-0+-; better is 12.Qh5 Qc8 13.Nf4 g6 14.Bg6 Kd8 15.Bh7 Ne7+-) 1–0. Wall,Bill – Trad M, internet, 2005.

4.Nf3 Nf6 5.Nc3 =.

4.b5 a6 5.e3 Ba3 6.Ba3 ab5 7.Bb4 (7.Qc1 Ne4 8.Nf3 Bd7-/+) 7...c6 (7...Ne4 8.Bb5 Bd7 9.Bd7 Nd7 10.Nf3-/+) 8.c3 (8.Nf3 Ne4-/+) 8...Ne4 (8...Nbd7 9.Qb3-/+) 9.a4 (9.d3 Nd6 10.Qg4-/+) 9...Na6 (better 9...c5!? 10.Bb5 Bd7-/+) 10.ab5= cb5 11.Qb3 (better 11.d3!? Nd6 12.Nf3=) 11...Bd7-/+ 12.Nf3 Nb4 13.Qb4?? (better 13.Ra8 Qa8 14.Qb4 Qa1 15.Ke2-/+) 13...Ra1 14.Ke2 Qe7 (better 14...Ra4 15.Qb1 b4 16.Ne5 bc3 17.d3-+) 15.Qe7 (15.g4 Ra4 16.Qb2 0-0-+) 15...Ke7 16.Nd4 Rd1! 17.Nf3 (17.Kd1 Nf2 Double attack) 17...Rb1 18.g3 Ra8 19.Bg2 Rh1 20.Bh1 Nf6 (better 20...Ra2!? 21.Kf1-+) 21.Nd4 (21.Ne5 b4! 22.cb4 Bb5 23.Kf3 Ra2-+) 21...h5 (21...b4!? 22.f4 bc3 23.dc3 Ra2 24.Kf1-+) 22.Bg2 (22.Nc2 e5 23.Bg2 Kd6-+) 22...g5 (22...b4 23.cb4 e5 24.Nf3-+) 23.f3 (23.f4 g4 24.Nc2 Ne4-+) 23...e5 (23...b4 24.cb4 e5 25.Nb3-+) 24.Nc2 e4 25.f4 (25.Nb4 Kd6 26.fe4 de4-+) 25...gf4 26.gf4 Bg4 (better 26...Kd6 27.Nd4-+) 27.Kf2 (27.Ke1-+) 27...Ra2 28.h3 Rc2 29.hg4 Rd2 30.Kf1 Rc2 (30...Rc2 31.gh5 Rc3-+) 0–1. invictus31 (1710) – Prokrita (1630), lichess.org, 2020.

4.b5 c6 5.e3 Be7 6.c3 0-0 7.Nc2 (7.Nf3 a6 8.bc6 Nc6-/+) 7...cb5 (7...e5 8.Be2-/+) 8.Bb5 Nc6 (8...Bd7 9.Bd7 Nbd7 10.Nf3-/+) 9.a4 (9.Nf3 Qb6 10.Bc6 bc6-/+) 9...a6 10.Be2 Bd7 11.Qc1 (11.Nf3 Qc7-/+) 11...b5 (11...Na5 12.Ba3 Nb3 13.Be7 Qe7=+ (13...Nc1? 14.Bd8 Nb3 15.Ra3 Rfd8 16.Rb3+-)) 12.ab5=+ ab5 13.Nf3 Qc7 14.Ncd4 Nd4 15.Nd4 Ne4 16.0-0 (16.f3 Ra1 17.Qa1 Nd6=+) 16...b4 (16...Ra1 17.Ba1 e5 18.Nb5 Qa5=) 17.cb4 Bb4?? (better 17...Qc1 18.Rfc1 Bb4=) 18.Qc7+- Ra1 19.Ra1 Nc5 20.Bb5 (better 20.Qb6 Na4 21.Qb4 Nb2 22.Qb2 e5+-) 20...Rc8 21.Qc8! Bc8 22.Ra8 g6 23.Rc8 Kg7 24.Rc5! Bc5 (24...Bc5 25.Nb3 Double attack (25.Nb3 Decoy)) 25.Nc2 (better 25.Ne6 Kg8 26.Nc5+-) 25...f6 26.Ba3 (26.f4 Kf7+-) 26...Bb6 (26...Ba3 27.Na3 Kf7 28.Bc6+-) 27.d4 Kf7 28.Bc5 Bc7 29.Nb4 e5 (29...h5 30.Bd3+-) 30.Na6 (30.Nd5 Bd8+-) 30...Bd8 (30...Ba5 31.Nb8+-) 31.de5 (31.Bc6 ed4 32.Bd5 Ke8 33.Bd4 f5+-) 31...fe5 32.g3 (32.Bc6 Ke6+-) 32...Ke6 33.Kg2 Bf6 (33...Ba5 34.Nb4 e4 35.Bc6 Bb4 36.Bb4+-) 34.Nc7 Kf5 35.Nd5 (35.e4 de4 36.Bd7 Kg5 37.Ne6 Kh5 38.Kh3 g5 39.Be8 Kh6 40.Bf8 Bg7 41.Bg7) 35...Bg7 36.Ne7 (36.Bd7 Kg5 37.h4 Kh6 38.g4 g5 39.h5 Bh8 40.Bf8 Bg7 41.Ne7 Bf8 42.Nf5) 36...Ke6+- 37.Ng6! hg6 38.e4 Bf6 39.h4 Kf7 (39...Bd8 40.Bc4 Kf6 41.Bd6+-) 40.Kh3 Kg7 (40...Bd8 41.f4 Bc7 42.Kg4+-) 41.Kg4 (better 41.f4 ef4 42.gf4 Kf7+-) 41...Kh6 (41...Kf7 42.Bc4 Ke8 43.f4+-) 42.f4 ef4 (42...Kg7 43.Bc4 Kh6 44.Bf8 Kh7+-) 43.gf4 Kg7 (43...Bb2 44.e5 Kg7 45.e6 Bf6 46.Bd4 Bd4 47.e7 Bc3 48.e8Q Be1 49.Qe1 Kh7 50.Qe7 Kh8 51.Bc4 g5 52.Qf7 gh4 53.Qg8) 44.e5 Bd8 45.h5 gh5 46.Kh5 Kf7 47.f5 Bc7 (47...Be7 48.Bc4 Kf8 49.Be7 Ke7 50.f6 Ke8 51.Kg6 Kd7 52.f7 Ke7 53.Kh7 Kf8 54.e6 Ke7 55.Kg7 Kd6 56.f8Q Ke5 57.e7 Kd4 58.Qf4 Kc3 59.e8Q Kc2 60.Qee3 Kb2 61.Qc1) 48.Bd6 (48.Bc4 Ke8 49.e6 Bb6 50.Bb5 Kd8 51.Bd6 Kc8 52.e7 Kb7 53.e8Q Bc7 54.Qc6 Kb8 55.Qc7 Ka8 56.Bc6) 48...Bb6 (48...Bd8 49.Bc4 Ke8 50.f6 Kd7 51.f7 Be7 52.Be7 Ke7 53.e6 Kf8 54.Kg6 Ke7 55.Kg7 Kd6 56.f8Q Kc6 57.Qe7 Kb6 58.Qd6 Ka5 59.Qc5 Ka4 60.Qb6 Ka3 61.Qb3) 49.Bc4 Ke8 50.Kg6 (50.f6 Kd7 51.f7 Be3 52.f8Q Bb6 53.Bb5 Ke6 54.Qg8 Kf5 55.Qg4) 50...Bd8 (50...Bc7 51.Bc7 Kd7 52.f6 Kc7 53.f7 Kc8 54.f8Q Kc7 55.Qa8 Kb6 56.Qc8 Ka5 57.Qc5 Ka4 58.Qb6 Ka3 59.Qb3) 51.f6 (51.Bb5) 51...Kd7 52.Be7! Be7 53.fe7 Ke7 54.Kg7 Kd7 (54...Ke8 55.Kf6 Kd7 56.e6 Kc6 57.e7 Kc5 58.Be2 Kd4 59.Kf7 Kc3 60.e8Q Kb2 61.Qb5 Kc3 62.Qd3 Kb4 63.Qc4 Ka3 64.Qc3 Ka2 65.Bc4 Kb1 66.Qd2 Ka1 67.Qc1) 55.Kf7 Kd8 (55...Kc6 56.e6 Kc5 57.Be2 Kd4 58.e7 Ke3 59.e8Q Kd2 60.Qe7 Kc2 61.Qb4 Kc1 62.Bd3 Kd1 63.Qb2 Ke1 64.Qe2) 56.e6 Kc7 57.e7 Kd6 (57...Kc6 58.e8Q Kc5 59.Qe4 Kd6 60.Qd5 Kc7 61.Qc5 Kb7 62.Bd5 Kb8 63.Qb6 Kc8 64.Be6) 58.e8Q Kc5 59.Qe4 Kd6 (59...Kb6 60.Qd4 Kc6 61.Ke7 Kc7 62.Qd7 Kb6 63.Kd6 Ka5 64.Qb5) 60.Qd5 Kc7 61.Ke7 (61.Qc5 Kb7 62.Bd5 Ka6 63.Qb4 Ka7 64.Qb7) 61...Kc8 (61...Kb6 62.Qd6 Ka5 63.Qc5 Ka4 64.Qb6 Ka3 65.Qb3) 62.Qd7 (62.Ba6 Kc7 63.Qd6) 62...Kb8 63.Qc6 (63.Ba6 Ka8 64.Qb7) 63...Ka7 64.Kd7 (64.Qc7 Ka8 65.Bd5) 64...Kb8 65.Qb6 Ka8 66.Bd5 1–0. invictus31 (1620) – NenadKatic96 (1615), lichess.org, 2020.

4.b5 Bd7 5.e3 Bb4 6.c3 Ba5 (6...Bd6 7.Nf3=+) 7.Qa4 (7.Nf3 a6=) 7...Bb6 (7...c6!?-/+) 8.Nf3= 0-0 9.Ne5 (9.Be2 Na6=) 9...h6 (9...Be8 10.c4=+) 10.Nd7 (10.c4 Be8=) 10...Nfd7 (10...Nbd7 11.Be2=+) 11.d4= Nf6 12.Be2 Ne4 13.0-0 c6 (13...c5 14.Bd3 Nd7 15.Be4 de4 16.Nc4=) 14.c4 (14.f3 Nd6+=) 14...cb5 (14...Qg5 15.Bd3+=) 15.Nb5 dc4 (15...Nc6 16.cd5 ed5 17.Nc3+=) 16.Bc4 Nd2 17.Rfc1 Nc4 18.Rc4 (18.Qc4 Nc6+-) 18...Nc6 (18...a6 19.Rcc1 Nc6 20.Nc3+=) 19.Qc2 (19.Ba3 Na5 20.Rc2+- (worse 20.Bf8 Nc4 21.Qc4 Qf8=)) 19...Qd5= 20.Ba3?? (20.a4 a6 21.Na3 Rac8=) 20...Na5?? (better 20...Qb5 21.Bf8 Rf8-+) 21.Nc7?? (better 21.Bf8 Qc4 22.Qc4 Nc4 23.Bb4=) 21...Bc7 (better 21...Qc4 22.Qc4 Nc4 23.Na8 Ra8-+) 22.Rc7+- Nc6?? (better 22...Rfb8+-) 23.Bf8+- Kf8 (23...Rf8 24.Qb2 (24.Rb7?! Nd4 25.Qb2 Nc6+-) 24...Nd8 25.Rac1+-) 24.Rb1 Na5 (24...Qa5 25.Rcb7 Nd8 26.R7b5+-) 25.Qc5 (25.Qh7 Qd7 26.Rd7 Ke8 27.Rdb7 Nb7 28.Rb7 Rc8 29.Qg8) 25...Qc5+- 26.Rc5 b6 27.Rc7 g6 (27...h5 28.Rb5 g6 29.d5+-) 28.Rbc1 h5 (28...Ke8 29.g4+-) 29.Rd7 Rb8 (29...Kg8 30.Rcc7 Rf8 31.Ra7+-) 30.Rcc7 Ke8 (30...Kg8 31.Rf7 Rc8+-) 31.Rf7 Kd8 (31...Rc8 32.Rce7 Kd8 33.Rd7 Ke8+-) 32.Ra7 (32.Rfd7 Ke8 33.Rh7 Kd8 34.Rcg7 Rc8 35.Rg8) 32...Rc8 33.Rf8 1–0. invictus31 – crowndice, lichess.org, 2019.

4.b5 ab5 5.ab5 Ra1 6.Ba1 Nd7 7.Nc3 b6 8.Qb1 Nc5 9.e3 Nf6 10.g3 Bd6 11.d4 Nce4 12.Ne4 Ne4 13.Bg2 0-0 14.Be4 de4 15.Ne2 Bb4?? 16.c3?? Ba5= 17.Qa2 Bb7 18.0-0 c6 19.bc6 Bc6 20.Nc1 Bb5 21.Rd1 Bd7 22.Nb3 Qa8 23.Na5 ba5 24.Bb2 Rb8 25.Ra1 a4 26.Bc1 Qa6 27.Qc2 Rc8 28.Qe4 Rc3 29.Bd2 Rb3 30.Qc2 g6?? 31.Qb3!!+- Qc6 32.Qb8 Kg7 33.Bb4 Kf6 34.Qe5 1–0. wk1234 – jaromaruda, kurnik, 2012.

4.g3 b6 5.Bg2 Bb7 6.c4 Nd7 7.Nc3 Rb8 8.cd5 ed5 9.Nd5 Bd5 10.Bd5 Ndf6? 11.Bf6?? Qd5-+ 12.Bc3? Qh1 13.Kf1 Nf6 14.e3 Be7 15.Qe2 0-0 16.Qa6 Qb7 17.Qe2? Nd5 18.Rc1 Nc3 19.dc3 Rfd8 20.Nf3 Rd7 21.Nd4 Rbd8 22.Qb5 c5 23.bc5 bc5 24.Qb7 Rb7 25.Nc6 Rd2 26.a5 Ra2 27.Rd1 g6 28.e4 Kg7 29.e5 Rc7 30.Ne7 Re7 31.Rd5 c4 32.Rc5 Ra4 33.Kg2 h6 34.Kf3 Ra7 35.Ke4 R7a5 36.Rc7 Ra2 37.e6 Re2 38.Kd4 Re6 39.Kc4 Ra2 40.f4 Rh2 41.Kd5 Rd2 42.Kc4 Rg2 43.Kd5 Rg3 44.c4 Rc3 45.c5 h5 46.Ra7 h4 47.Ra2 Rf3 48.c6 Rc6! 49.Kc6 Rf4 50.Rh2 g5 51.Kd5 Kg6 52.Ke5 f6 53.Ke6 Kh5 54.Re2 h3 55.Rh2 Rf3 56.Kd5 g4 57.Ke4 Kh4 58.Rh1 g3 (58...g3 59.Kf3 h2=) 0–1. wk1234 – dephazznuevo, kurnik, 2012.

4.g3 Nc6 5.c3 Be7 6.Nf3 Bf6 7.Qb3 Nge7 8.Bg2 0-0 9.0-0 Re8 10.d4 Nb8 11.Nbd2 Nd7 12.b5 c6 13.c4 Ng6 14.c5 ab5 15.ab5 Ra1 16.Ra1 e5 17.de5 Nde5 18.Ra8 Qe7 19.bc6 bc6 20.Ne5 Ne5 21.Be5 Be5 22.Nf3 Bf6 23.e3 h6 24.Nd2 Qc5-/+ 25.Nf1 Kh7 26.Qd3 g6 27.Nd2 Bd7 28.Re8 Be8 29.Nb3 Qb6 30.Nd4 Bd4 31.Qd4 Qd4 32.ed4 Kg7 33.Kf1 Bd7 34.Ke2 Kf6 35.Kd3 Bf5 36.Kc3 Ke6 37.h3 Kd6 38.g4 Bb1 39.Bf3 g5 40.Be2 c5 41.dc5 Kc5 42.Bf3 d4 43.Kd2 Bg6 44.Be2 Kd5 45.f3 Ke5 46.Bc4 Kf4 47.Be2 Kg3 48.Bd3 Bd3 49.Kd3 Kf3 50.Kd4 Kg3 51.Ke5 Kh3 52.Kf6 Kg4 53.Kf7 h5 54.Kg6 h4 55.Kf6 h3 56.Kg6 h2 57.Kf6 h1Q 58.Kg6 Kh4 59.Kf6 g4 60.Ke6 g3 61.Kd6 g2 (61...g2 62.Kc7 Qd1 63.Kc6 g1Q 64.Kb5 Qd5 65.Ka6 Qa1 66.Kb6 Qaa5) 0–1. wk1234 – sdamico, kurnik, 2012.

4.g3 Nc6 5.c3 Nge7 6.Bg2 e5 7.Nf3 f6 8.0-0 e4 9.Nd4 Nd4 10.cd4 c6 11.Qc2 Nf5 12.h3 Bb4 13.g4 Nd6 14.Ba3 a5 15.Bb4 ab4 16.Qb3 b5 17.Qb4+= Qd7 18.Nc3 ba4 19.Ra4 Ra4 20.Qa4 0-0 21.Rb1 Nb5 22.Nb5+/– cb5 23.Qb5 Qb5 24.Rb5 Be6 25.Rb6 Bf7 26.Rd6 Rb8 27.f3 Rb2?? 28.fe4 de4?? 29.Be4 Rd2? 30.Kf2 g6? 31.Rd8 Kg7 32.d5 f5 33.gf5 gf5 34.Bf5 Rd5 35.Rd5 Bd5 36.e4 Bc4? 37.Kf3 Kf6? 38.Kf4+- h6 39.h4 Bb3 40.Bc8 Bc4 41.Bb7 Be6 42.e5 Kg6 43.Be4 Kg7 44.h5 Kf7 45.Bg6 Kg7 46.Be8 Kf8 47.Bc6 Ke7 48.Be4 Kd8 49.Bf5 Ke7?? 50.Be6 Ke6 51.Ke4 Ke7 52.Kf5 Ke8 53.Kg6 Ke7 54.Kh6 Ke6 55.Kg6 Ke5 56.h6 Ke6 57.h7 Ke5 58.h8Q (58.h8Q Ke4 59.Qe8 Kd5 60.Kf5 Kd4 61.Qe5 Kd3 62.Qc5 Kd2 63.Ke4 Ke2 64.Qc2 Ke1 65.Ke3 Kf1 66.Qf2) 1–0. wk1234 – supersenis, kurnik, 2012.

4.g3 Bb7 5.Bg2 Nd7 6.c4 c6 7.Nh3 h6 8.0-0 f6 9.Nf4+/– Qe7? 10.cd5 cd5?! 11.Qb3 Qb4 12.Qb4 Bb4 13.Ne6 Kf7 14.Nc7 Rc8 15.Nd5 Bc5 16.d4 Bd6 17.Ndc3 Bg2 18.Kg2 Ne7 19.Nb5 Bb8 20.Nd2 a6 21.Nc3 Rhe8 22.Ba3?? Nf5?? 23.Nce4 Nd4 24.Nd6? Bd6-+ 25.Bd6 Ne2 26.Rfe1 Nd4 27.Re8 Re8 28.Nc4 b5 29.Na5 Ne5 30.Rd1 Ndc6 31.Nc6 Nc6 32.ab5 ab5 33.Rb1 Na7 34.Bc5= Nc6 35.Rb5 Ne5 36.Rb7 Kg6 37.Bd4 Nd3 38.h4 Ne1 39.Kf1 Nf3 40.Be3 Rc8 41.Kg2 Ne5 42.f4 Rc2 43.Kf1 Ng4 44.Ba7 Rc3 45.Bf2?? Rf3-+ 46.Rb2 h5?? 47.Kg2= Ra3 48.Bc5 Rc3 49.Bf8 Rc8 50.Be7 Nh6 51.Rb7? Nf5-+ 52.Bb4 Rc2 53.Kf3 Rc4?? 54.Bd2 Nd4 (54...Nd4 55.Ke4 Nb3 56.Kd3 Nd2 57.Kd2 Ra4=) 0–1. wk1234 – jaromaruda, kurnik, 2012.

4.g3 Bb7 5.Bg2 f5 6.Nh3 Nf6 7.b5 Nbd7 8.Nf4 Qe7 9.0-0 Rb8 10.c3 g5 11.Nd3 e5 12.e3 e4 13.Nc1 Nc5 14.d4 ed3 15.Nd3 Nce4 16.f3 Nc5 17.Nc5 Qc5 18.Qd4 Qd4 19.cd4 Be7 20.Nc3 c6 21.Rfc1 c5 22.dc5 Bc5 23.Kf2 f4 24.gf4 gf4 25.Nd1 fe3 26.Ne3 d4 27.Ke2 Rg8 28.Rg1 de3 29.Bf6+= Kf7 30.Bc3? Rbd8 31.Rad1?? Rde8 32.Rd7 Re7 33.Re7 Ke7 34.Bb2 Rd8?? 35.Bc1? a6?? 36.Be3+/– Be3 37.Ke3 ab5 38.ab5 Rg8 39.Kf2 h5 40.Ra1 Bd5 41.Ra7 Kd6 42.Bh3 Kc5 43.Rd7 Bc4?? 44.Rc7+- Kb5 45.Bd7 Kb4 46.Rb7?? b5= 47.Ke3 1–0. wk1234 – poklekoj, kurnik, 2012.

4.g3 Bb7 5.Bg2 Nf6 6.b5 g6 7.c4 Bg7 8.Nc3 c5 9.cd5 Nd5 10.Qc2?? 0-0 11.Nd5= Bd5 12.Bd5 Qd5 13.Nf3 Bb2 14.Qb2 Nd7 15.0-0 Rfd8 16.Rfe1 Nf8 17.e4 Qd6 18.Rad1 Qd3 19.Re3 Qc4 20.Ne5 Qa4 21.Nc6?? Rd7 22.Ra1+- Qc4 23.Ne5 Qd4+= 24.Qc3 Qc3 25.dc3 Rd6 26.Nc6 Nd7 27.Ra7 Ra7 28.Na7 Ne5 29.f4 Nc4 30.Rf3 Na3 31.Nc6?? Nb5-+ 32.e5?? Rc6 33.c4 Nd4 34.Kg2 Rc8 35.Ra3 Rb8 36.Ra6 b5 37.cb5 Rb5 38.Kf2 Rb2 39.Ke3 Rh2 40.Ra5 Rg2 41.Rc5 Rg3 42.Kd4 Rg4 43.Ke4? h5 44.Rc3? Kg7 45.Rh3 Kh6 46.Rd3? g5 47.Kf3 Rf4 48.Kg3 Re4 49.Rd7 Kg6 50.Rc7 Re5 51.Rc4 h4 52.Kg4 f5 53.Kh3-+ Re3 54.Kh2 g4 55.Kg2 h3 56.Kf2 e5 57.Ke3 f4 58.Kf2 g3 59.Kg1 Kf5 60.Rc2 e4 61.Re2 e3 62.Kh1 Ke4 63.Rc2 (63.Rc2 Kd3 64.Rc8 e2 65.Re8 f3 66.Rd8 Ke3 67.Re8 Kf2 68.Re7 g2 69.Kh2 g1Q 70.Kh3 Qg3) 1–0. wk1234 – rysiek51, kurnik, 2012.

4.g3 c6 5.Bg2 Bb7 6.Qc1 Nf6 7.b5 c5 8.c4 Be7 9.Bf6 Bf6 10.Nc3 0-0 11.Ra2 Nd7 12.cd5 Bd5 13.Nd5+= ed5 14.Bd5 Rc8 15.e4 c4 16.Ne2 Nc5 17.f3?? Nd3-+ 18.Kd1 Nc1 19.Kc1 c3 20.Nc3 Bc3 21.Rc2 Bd2! 22.Kd2 Rc2 23.Kc2 Qc7 24.Kd2 Qc5 25.Rc1 Qb4 26.Ke3 Qa4 27.Rc7 Qb5 28.Bc4 Qa5 29.e5 b5 30.Rc5 Qa3 31.Kd4 Rd8 32.Bd5 Qb4 33.Ke3 Qc5 (33...Qc5 34.Ke4 Qd5 35.Kf4 f6 36.Kg4 Qd7 37.Kf4 g5 38.Ke3 Qd2 39.Ke4 Qd3) 0–1. wk1234 – fafou, kurnik, 2011.

4.b5 a6 5.e3 ab5 6.ab5 Ra1 7.Ba1 Qa5 8.Nc3 Bd7 9.d4?? c4 10.Nf3?? Bb5 11.Ne5 Bb4-+ 12.Qf3?? Nf6 13.Bc4 Qa1 14.Qd1 Qd1 15.Kd1 Bc4 16.Nc4 dc4 17.Nb5 0-0 18.h3 b6 19.f3 c3 20.g4 Ba5 21.h4 Nd5 22.h5 Ne3 23.Kc1 Nc6 24.h6 g6 25.f4 Rd8 26.f5 ef5 27.gf5 Nd4 28.Nd4 Rd4 29.fg6 fg6 30.Re1 Rd1! 31.Rd1 Nd1 32.Kd1 Kf7 33.Ke2 Kf6 34.Kd3 Kg5 35.Ke4 Kh6 36.Kf4 Kg7 37.Kg5 h6 38.Kg4 Kf6 39.Kf4 h5 40.Ke4 g5 41.Kf3 Kf5 42.Ke3 h4 43.Kf3 g4 44.Kg2 Kf4 45.Kf2 h3 46.Kg1 g3 47.Kh1 Kf3 48.Kg1 h2 49.Kh1 g2 50.Kh2 Kf2 51.Kh3 g1R 52.Kh4-+ Kf3 53.Kh5 Kf4 54.Kh6 Kf5 55.Kh7 Kf6 56.Kh8 Kf7 57.Kh7 Rh1 0–1. aleksandras19 – whistake, kurnik, 2012.

4.bc5 Bc5?? 5.Bg7 Qh4 6.g3 Qg4 7.Bh8 Nh6 8.Bh3 Qc4 9.Bb2 Nf5 10.Bf5 ef5 11.Nf3 Nc6 12.0-0 f4 13.d3 Qa6 14.Nc3 Be6 15.Qd2 fg3 16.hg3 0-0-0 17.d4 Bd6 18.Nb5 Bb4 19.c3 Be7 20.Qf4 Rg8 21.Qc7 1–0. wk1234 – belloso, kurnik, 2012.

4.bc5+= Nc6 5.Ra2 Nf6 6.Ra3 Bc5-/+ 7.Rg3? Rg8 8.Na3?? Ne4 9.Rf3? Qb6 10.e3 Qb2 11.Nb5 Kd8 12.Bd3 a6 13.Nc3 Nc3 14.dc3 Qc3 15.Ke2 Ne5 16.Rh3 h6 17.Nf3 Nf3 18.gf3 Bd7 19.Rg1 Ba4 20.Rh6 Kc7 21.Rh4 Bb5 22.Qb1 Bd3 23.cd3 Qb4 24.Rb4+- Bb4 25.Qb4 1–0. xtom – wolbar (1685), kurnik, 2011.

4.Ra3 Nb4-/+ 5.Rg3 Nf6 6.Na3 Bd6 7.Rg7+= Rg8?? 8.Bf6+- Qf6 9.Rg8 Ke7 10.e3 c6 11.Nf3 c5 12.Bd3 Nd3 13.cd3 c4 14.dc4 Ba3 15.cd5 ed5 16.Qb3 Qd6 17.Qc3 Bb4 18.Qd4 Be6 19.0-0 Rg8-+ 20.Rb1 a5 21.Qh4 Kd7 22.Qh7 Qf8 23.Qd3 Qg7 24.Qb5 Ke7 25.Qb7+= Kf6 26.g3 Qg4 27.Nd4 Qe4 28.f3?? Qb1-+ 29.Kf2 Qb2 30.g4 Qd2 31.Kg3 Qe3 32.Nc6 Be1 33.Kg2 Qf2 34.Kh1 Qf1 0–1. xtom – 1at1, kurnik, 2011.

4.b5 Na5 5.g3 b6 6.d3 Bb7 7.c4? d4 8.Nf3+= Bf3 9.ef3 Qe7 10.Bd4 e5 11.Bc3+/– Rd8 12.Be2 Nf6 13.0-0 Qd6? 14.Nd2 Be7 15.Ne4 Ne4 16.de4 Qd1 17.Rad1 Rd1 18.Rd1 0-0 19.Ba5 ba5 20.Rd7 Bd6 21.c5! Bc5 22.Rc7 Bb6 23.Rc6 f6 24.Kg2 g6 25.Bc4 Kg7 26.Bd5 f5 27.ef5 gf5 28.Re6 Bd4 29.Re7 Kh8 30.f4 e4 31.Bc4 Rc8 32.Bd5 Bc5?? 33.Rf7 Rf8 34.Rc7 Bb6 35.Rc6 Kg7 36.h3 h6 37.Rc2 Rd8 38.Bc4 Kf6 39.Bf1 Rd6 40.f3 e3 41.Be2 Rd2 42.Rc6 Ke7 43.Kf1 Ra2 44.Rh6 Ra4 45.Rh5 Ra1-+ 46.Kg2 a4 47.Rf5+= a3 48.Re5 Kd6 49.Bc4? a2-+ 50.Re6?? Kc5 51.Re3 Kc4 52.Re4 Kb5 53.f5 Rg1 54.Kh2 a1Q 55.h4 Rh1 (55...Rh1 56.Kg2 Qf1) 0–1. wk1234 – muscacostica, kurnik, 2011.

4.b5 Na5 5.g3 Nc4 6.Bc3 f6 7.d3 Nd6 8.Bg2 Be7 9.Nf3 Nh6 10.0-0 Bd7 11.Nd4 0-0 12.Bh3 e5-/+ 13.Be6 Be6?? 14.Ne6+/– Qd7 15.Nf8 Rf8 16.Nd2 d4 17.Bb2 Qh3 18.Nf3 e4? 19.de4+- Ne4 20.Qd4 Ng5 21.Ng5 fg5 1–0. wk1234 – cocobolo, kurnik, 2012.

4.b5 Nb8 5.g4 h6 6.Bg2 Nf6 7.h3 Ne4 8.d3 Nc5 9.Nf3 Bd6 10.Bg7 Rg8 11.Bh6 f6? 12.Be3 e5 13.Nc3 d4+= 14.Ne4?? de3 15.fe3 Ne4 16.de4 Bb4 17.Kf2 Qd1 18.Rhd1 Bc3 19.Ra3 Bb4 20.Rad3 Rg7?? 21.Rd8+- Ke7 22.Rc8 Nd7 23.Ra8 Nc5 24.Ra7 Ne4 25.Kg1 Bc5 26.Rb7 Be3 27.Kh2 Bf4 28.Kg1 Bg3?? 29.Rc7+- Kf8 30.Rd8 1–0. wk1234 – zuki44, kurnik, 2012.

4.g3 f6 5.Bg2 Nd7 6.b5 g6 7.g4 Bg7 8.g5 0-0 9.gf6 Nf6 10.Bf6 Bf6 11.Nc3 Bg7 12.Ra2 c6 13.Nf3 cb5 14.ab5 b6 15.h4 Nf5 16.h5 Qf6 17.hg6 hg6 18.Bh3 Nh4 19.Nh4?? Qf2 0–1. wk1234 – fahro75, kurnik, 2012.

4.g3 Ng6 5.Bg2 e5 6.b5 Be6 7.Nf3 Bd6 8.Nc3 0-0 9.Ng5?? d4?? 10.Bb7 dc3 11.Bc3 Nd7 12.Ba8 Nc5 13.Bc6 Qg5 14.0-0 h5 15.f3 h4-/+ 16.g4 f5 17.d4 fg4 18.fg4 Qg4 19.Kh1 Ne4 20.Be4 Qe4 21.Rf3 Bd5 22.Qd3 Qg4 23.Rg1 Qh3 24.e4?? Rf3-+ 25.Qe2 Re3 26.Qf2 Be4 27.Rg2 Bg2 28.Qg2-+ Rc3 29.Qh3 Rh3 30.Kg2 Rc3 31.de5 Ne5 32.h3 Nc4 33.Kf2 Rc2 34.Kf3-+ Ra2 35.Kg4 Ra4 36.Kh4 Ra5 37.Kg4-+ Rb5 38.h4 a5 39.h5 a4 40.Kf3 a3 41.Ke4 a2 42.Kd4 Nb2 43.Kc3 a1Q 44.Kd4 Qa4 45.Kc3 Nc4 46.Kd4 Nb6 47.Ke3 Rb3 48.Kd2 Qa2 49.Kc1 Ba3 50.Kd1 Nc4 51.Ke1 c6 52.Kf1 Ne3 53.Kg1 Bc5 54.Kh1 Qc2 55.Kg1 Ng4 56.Kh1 (56.Kh1 Qe4#; 56.Kf1 Rb1) 0–1. wk1234 – fatosiii, kurnik, 2011.

4.Ra3 Bb4 5.Rg3 Bf8 6.Na3 Ne7 7.Qa1 Ng6 8.h4 e5 9.h5 Nf4 10.e3 Ne6 11.f4 ef4 12.ef4 Nf4 13.h6 Ng6 14.Bd3 Kf7 15.Ne2 Bd6 16.Rf3 Nd7 17.Nb5 Be5?? 18.Ned4?? c6 19.hg7 Bd4?? 20.gh8Q+- Qh8 21.Nd4 Qe8 22.Re3 Qg8 23.Nf5 Nde5 24.Nd6 Ke7 25.Ba3 Kd7 26.Nc8 Kc8 27.Bf5 Kc7 28.Qc3 Re8 29.Qc5 Nc4 30.Kd1 Ne3? 31.de3+- Qf7?? 32.Qd6 Kb6 33.a5! Ka5 34.Qc5 b5 35.Qc6 d4+- 36.Bd3 Rb8 37.Rh5 Ne5 38.Qc5 Qh5-+ 39.Kc1 (39.Kc1 Nd3 40.cd3 Qc5 41.Bc5 de3 42.Be3-+). xtom – hakigashi (1625), kurnik, 2011.

4.Ra3 Bb4 5.Rg3 g6 6.Na3 a6 7.e3 Nh6 8.Qa1 Be7 9.Nf3 0-0 10.Bd3 c5 11.h4? c4 12.Be2 Nf5 13.Rg4 e5 14.h5 g5 15.h6 Nh6! 16.Rh6? Bg4 17.Nh2 Be2 18.Ke2 Rf7 19.Ng4 Nc6 20.g3 b5! 21.f4 b4 22.Nb1 Kg7 23.fg5 fg5 24.Be5 Kg8?? 25.Nf6?? Bf6-+ 26.Bf6 Qf8 27.e4 d4 28.Bd4 c3 29.dc3 Qh6 30.cb4 Qh2 31.Kd3 Qg3 32.Kc4 Rc8 33.c3 Rd7 34.Bc5-+ Ne5 35.Kb3 Qd3 36.Qa2 Qc4 37.Ka3 Qa2 38.Ka2 Nd3 39.Bd4 Rd4! 40.cd4 Rc2 41.Kb3 Rb2 42.Kc3 Rb1 43.Kd3 Rb4 44.d5 Ra4 45.e5 Kf7 46.Ke3 h5 47.Kf3 h4 48.Ke3 g4 49.Kf2 Ra3 50.Kg2 Ra2 51.Kf1 h3 52.Kg1 g3 53.Kf1 h2 54.e6 Ke7 55.d6 Kd6 56.e7 Ke7 57.Ke1 h1R (57...h1Q) 0–1. xtom – danvita10 (1785), kurnik, 2011.

4.b5 b6 5.g3 c5 6.Bg2 Bd6 7.c4 Bb7 8.Nc3 Ne7 9.e3 Qc7 10.Qh5 g6 11.Qg4 0-0? 12.Qe6+- Kg7 13.Nd5 Bd5 14.cd5 Nd7 15.Nf3 Rae8 16.Ng5 Nf5+/– 17.Qe8?? Re8+= 18.Ne6 Re6 19.de6 Ne5 20.f4?? Nc4 21.Bc3+= Qe7 22.Bd5 Na5 23.Ba5 ba5 24.0-0 Nh6 25.Rfb1 Bc7 26.Rc1 Bb6 27.d4?? Ng4 28.dc5 Bc5 29.Rc2?? Ne3 30.Rc3 Nd5 31.Kg2 Nc3 32.Rc1 Qe6 33.Rc3 Qd5 34.Kh3 Bb6 35.Rc6 Qd7 36.Kg2 Qd2 37.Kf3 Qb4 38.h4 Qa4 39.g4 Qb5 40.Rc3 Qd5 41.Kg3 a4 42.f5 gf5 43.gf5 Qf5 44.Kh2 Qg4 45.Rg3 Qg3! 46.Kg3 a3 47.Kf4 a2 48.Kf5 a1Q 49.h5 Qe5 50.Kg4 Qh5! 51.Kh5 a6 52.Kg4 a5 53.Kf3 a4 54.Ke2 a3 55.Kd2 a2 56.Kc3 a1Q 57.Kb4 f5 58.Kb5 Bg1 59.Kc6 f4 60.Kd5 f3 61.Ke4 f2 62.Kf3 f1Q 63.Ke4 (63.Kg3 Qaf6 64.Kg4 Q1f3) ½–½. wk1234 – miekli, kurnik, 2011.

4.b5 c5 5.g3 b6 6.Bg2 a5 7.c4 Bb7 8.Nc3 Ne7 9.cd5 Nd5 10.Nd5 Bd5 11.Bd5 Qd5 12.Nf3 Bd6 13.0-0 Nd7 14.d3 Ne5 15.Ne5 Be5 16.Be5 Qe5 17.f4 Qd4 18.Kh1 0-0-0 19.Qe1 h5 20.Qf2 g5 21.fg5 fg5 22.Qf3 Qd5 23.Qd5 Rd5 24.Rf6 Kd7 25.Raf1 Rd4 26.Rf7 Kd6 27.Rb7 Ra4 28.Rb6 Kd5 29.Rf6 Re8 30.Rg6 e5?? 31.Rg5 Rb4 32.Rh5 a4 33.Rh7 Ra8?? 34.Rd7 1–0. wk1234 – smokmoks, kurnik, 2012.

4.b5 Nf6 5.g3 c6 6.Bg2 cb5 7.ab5 Bd7 8.Nc3 Qb6 9.Qb1 Bb5 10.Ba3 Ba3?? 11.Ra3 a6?? 12.Nb5+- 0-0 13.Nc3 Qd6 14.Nf3?? Qa3-+ 15.0-0 b5 16.Qb3 Qb3 17.cb3 Nc6 18.Ra1 Rfd8 19.e3 e5 20.d4 e4 21.Nd2 Nb4 22.f3 ef3 23.Bf3 Rdc8 24.Nd5 Nbd5 25.Bd5 Nd5 26.Ne4 Ne3 27.Nc5 Rd8 28.Kf2 Nc2 29.Ra2 Nd4 30.Rd2 Rd5 31.Ne4 Rad8 32.Nc3 R5d7 33.Kg2 Nb3 34.Ra2 Rd6 35.Ne4 Re6 36.Kf3 Rd3 37.Kf4 Rd4 38.Re2 g5 39.Kf3 Rd3 40.Kg2 Nd4 41.Re1 Nf3 42.Re2 Nd4 43.Re1 f5 44.Nc5 Re1 45.Nd3 Re2 46.Kh3 h5 47.Nc5 Kf7 48.Na6 Kf6 49.Nb4 Nf3 50.Nd5 Ke5 51.Nc3 Rh2 0–1. wk1234 – zahei, kurnik, 2011.

4.b5 Nf6 5.g3 c6 6.Bg2 cb5 7.ab5 Bd7 8.Nc3 Qb6 9.Qb1 Bb5 10.Nb5+= Qb5 11.Ba3?? Qb1-+ 12.Rb1 Ba3 13.Rb7 Nbd7 14.Nf3 0-0 15.0-0 Nc5 16.Rc7 Nce4 17.Ra1 Bc5 18.e3 Bb6 19.Rc6 Rfc8 20.Rc8 Rc8 21.d3 Nd6 22.Ne5 Rc2 23.Bf1 Nb5 24.d4 Nc3 25.Nd3 Ne2 26.Be2 Re2 27.Nb4 Rb2 28.Nc6 Ne4 29.Na7 Ba7 30.Ra7 Rf2 31.Ra8 Kh7 32.Ra7 Kg6 33.h4 h5 34.Ra1 Re2 35.Ra3 Ng3 36.Rd3 Nf5 37.Kf1 Re3 38.Rd2 Rh3 39.Rg2 Kf6 40.Kf2 Rh4 41.Kf3 Rd4 42.Rc2 h4 43.Rh2 g5 44.Re2 Rf4 45.Kg2 e5 46.Rd2 d4 47.Rc2 Nd6 48.Rc6 Ke6 49.Rc2 f5 50.Rd2 Ne4 51.Rd3 Nc3 52.Kh3 Kd5 53.Rg3 Ne4 54.Ra3 Nc5 55.Rg3 Ne4 56.Ra3-+ Rf1 57.Ra5 Kc4 58.Re5 Kd3 59.Ra5 Ke3 60.Ra3 d3 61.Kg2 Rf2 62.Kg1 h3 63.Ra5 f4 64.Rf5 h2 65.Kh1 Ng3 0–1. wk1234 – zahei, kurnik, 2011.

4.a4 b6 5.e3 Bb7 6.c4 dc4 7.Nf3 Nf6 8.Bc4 Bc5 9.0-0 Nbd7 10.Be2 h6 11.Nd4 g5 (11...Bd4 12.Bd4 (worse 12.ed4 0-0=+) 12...Rc8 13.f4+=) 12.Bf3 Qc8 (12...Bd4!? 13.Bd4 Bf3 14.Qf3 Ra7+-) 13.Bb7+- Qb7 14.Nc6 0-0 15.Qf3 Kg7 16.Nc3 Nb8?? (better 16...e5+-) 17.Ne4 Nc6 (17...Nbd7 18.Nf6 e5 19.Nd7 f6 20.Nde5 Qc8+-) 18.Qf6 Kg8 19.Qg7 1–0. RichardSommer (1935) – anilaydin35 (1945), lichess.org, 2020.

4.a4 c6 5.e3 Bd6?? (better 5...Nf6=) 6.Bg7+- Be5 7.Be5 f6 8.Bb2 Nh6 9.Qh5 Nf7 10.Nf3 e5 11.c4 Be6 12.cd5 cd5 13.Nc3 d4 (13...h6 14.d4 e4 15.Nh4+-) 14.Ne4 (14.ed4 ed4 15.Ne4 Nd7+-) 14...de3 (14...Bd5 15.Qh4 Nd7 16.ed4+-) 15.fe3 (better 15.de3 Kf8+-) 15...Nd7 (15...Bd5 16.Nc3 Bb3 17.Ba3+-) 16.Be2 (better 16.Ba3 Nb6+-) 16...Qb6 17.0-0 0-0-0 (17...Bd5 18.Ne5 fe5 19.Bg4+-) 18.Rac1 Kb8 19.Nf6! Nf6 Theme: Deflection from e5 20.Be5 A double attack 20...Ne5 21.Qe5 Ka8 22.Qf6 Rhf8 23.Qh6 Rg8 24.g3 Rg6 (24...Rd6 25.Qh7 Kb8 26.d4+-) 25.Qh4 (25.Qh7 Rg4+-) 25...Rdg8 26.Nd4 Bd5 (26...Bg4 27.Bg4 Rg4 28.Qh7+-) 27.Bf3 (27.Qh7 R6g7 28.Qf5 Qd8+-) 27...Qd6 (27...Bf3 28.Rf3 Rh8 29.Rf7+-) 28.Qf4 (better 28.Nf5 Qe6 29.Ne7 Bf3 30.Ng8 Rg8 31.Rf3+-) 28...Rg3 (28...Bf3 29.Qd6 Rd6 30.Rf3 Rd7+-) 29.hg3 Rg3 30.Kf2 Qf4 31.ef4 Rf3 32.Nf3 Bf3 33.Kf3 (33.Kf3 Ka7 34.Rfe1 Kb6 35.Re6 Ka7 36.b6 Ka6 37.Rc8 h5 38.Ra8; 33.b6 Bc6 34.Rg1 h5 35.Rg8 Be8 36.Re8) 1–0. BeepBeepImAJeep – tactis (2045), lichess.org, 2018.

4.a4 Nd7 5.e3 Ngf6 6.c4 Be7 7.Nf3 0-0 8.Be2 c6 9.0-0 dc4 10.Bc4 Nb6 11.Be2 Nbd5 12.d4 Bd7 13.Nc3 Nc3 14.Bc3 Nd5 15.Bb2 (15.Bd2 Bd6+=) 15...cb5= 16.ab5 b6 17.Ne5 Be8 18.Rc1 (18.Qa4 Bd6+=) 18...Nb4 (18...a4 19.e4 Nf4 20.Bc4=) 19.Qb3 (19.Qa4 f6 20.Nc6 Nc6 21.bc6 Qc7+=) 19...Rc8 (19...a4 20.Qd1=) 20.Bf3 (better 20.Rc8!? Qc8 21.Rc1+=) 20...Bb5=+ 21.Rc8 Qc8 22.Rc1 Qb8 23.g3 (23.Ba3!?=+) 23...Rc8 24.Rb1 Qd6 25.Ba3 Qc7 26.Be4 (26.Bb4 Bb4 27.Be4 Bc4-/+) 26...Bd6 (26...Qc3!?-/+) 27.Rc1=+ Qc1 28.Bc1 Rc1 29.Kg2 Be5 30.de5 g6 31.Qb2 Rc5 32.Qd4 Kg7 33.Qd8 Nd5 (33...Re5 34.Qd4 f6 35.Qb6 Re4 36.Qb5 Re5 37.Qb7 Kg8+-) 34.Bd5+= Rd5 35.Qb6 a4?? (35...Bd3+=) 36.Qa7 (better 36.e4 Re5 37.Qd4+-) 36...Bc6+= 37.Kf1?? (37.e4 Rd7 38.Qe3 Rb7+=) 37...Rd2?? (better 37...Rd7 38.Qa5 Bf3 39.Qa4 Rd1 40.Qd1 Bd1-+) 38.Ke1= Rd7 (better 38...Ra2!?=) 39.Qa6+- Bf3 Do you see the mate threat? 40.Qa4 Rd5 41.Qb3 g5 42.e4 Rd1 43.Qd1 Bd1 44.Kd1 h5 45.Ke2 Kg6 46.f4 h4 47.Kf3 hg3 48.hg3 (worse 48.Kg3 Kh5 49.fg5 Kg5 50.h4 Kh5+-) 48...gf4 49.gf4 Kh5 50.Kg3 Kh6 51.Kg4 White prepares f5 51...Kg6 52.f5 Kh6 53.Kh4 Kh7 54.Kg5 (better 54.Kh5 Kg7 55.Kg5 ef5 56.Kf5+-) 54...Kg7 55.f6 (55.Kf4 Kf8 56.Kg4 Kg8+-) 55...Kh7 56.Kh5 (56.Kh5 Kg8 57.Kh4+-) 1–0. BeepBeepImAJeep (2725) – whiplash12 (2580), lichess.org, 2020.

4.Bg7+- Bd4 5.Bd4 Nf6 6.Nf3 Rg8 7.c4 (7.e3 Nbd7+-) 7...c6 (7...dc4 8.Qc2+-) 8.Qc2 Rg7 (8...dc4 9.Qc4 cb5 10.Qb5 Nc6 11.Bb2+-) 9.bc6 (9.Na3!? a6+-) 9...Nc6 10.cd5 Nd4 11.Qa4 Bd7 12.Qd4 ed5 13.Nc3 Be6 (13...Rg4 14.Qd3+-) 14.e3 Rg4 15.Bb5 (15.Qe5 Qe7+-) 15...Kf8 16.Qc5 Kg8 17.0-0 b6 (17...Ne4 18.Qa3+-) 18.Qa3 a5 (18...Ne4 19.d4+-) 19.Ne5 Rh4 (19...Rg7 20.Nc6 Qf8 21.Qf8 Kf8 22.Rfb1+-) 20.d4 Qc7 (20...Rc8 21.Rfc1+-) 21.Rac1 Qb8 22.Bc6 Ra7 23.Nb5 Nd7 24.Na7 Ne5 25.de5 Qe5 26.g3 Bh3 27.Rfd1 Rc4 28.Rc4 dc4 29.Rd8 Kg7 30.Qf8 Kf6 31.Rd6 Be6 32.Qh8 (32…Kf5 33.Qh7 Kf6 34.Qh8 Kf5 35.g4 Kg6 36.Qe5 a4 37.Be4 f5 38.Re6 Kf7 39.Re7 Kg6 40.Qg7) 1–0. Waibel,Ulrich – Hammacher,Martin, compuserve, 1995.

4.Bg7+- e5 5.Bh8 Bf2 6.Kf2 Qh4 7.g3 Qd4 8.e3 Qa1 9.Nf3 +-.

4.Bg7+- f6 5.Bh8 Qd6 6.e3 Qb6 (6...Qe7 7.d4 Bd6 8.c4 dc4 9.Bc4+-) 7.Qh5 Ke7 (7...Kd8 8.Qh7 Ne7 9.Bf6+-) 8.Qh7 Kf8 9.Qg7 Ke8 10.Qg8 Kd7 11.Qf7 Be7 12.Bf6 Qd6 13.Nf3 c6 14.Ne5 Kc7 15.Ng6 (better 15.Be7 Nd7 16.Bd6 Kd6+-) 15...Qb4 16.Ne7 (better 16.Be7 Qe7 17.Qe7 Nd7+-) 16...Qb2 17.Bb2 (17.Bb2 Nd7 18.Be5 Kb6 19.Nc8 Rc8 20.Qd7 a6 21.Qc8 d4 22.Qd8 Kc5 23.Qd4; 17.Nd5 Kd6 18.Qe7 Kd5 19.c4 Ke4 20.Qh7) 1–0. GuestKDZJ – GuestXVXV, freechess.org, 2017.

4.Bg7+- Qg5 5.Bh8 f6 6.g3 e5 7.e3 Bg4 8.Be2 Be2 9.Qe2 Nd7 10.Bf6 (better is 10.Nf3 Qg6 11.d4 Bb4 12.c3+-) 10...Qf6 11.Qh5 Qg6 12.Qg6 hg6 13.Ne2 0-0-0 14.d3 Re8 15.0-0 Ngf6 16.Nbc3 d4 17.ed4 (better is 17.Na4 de3 18.Nc5 Nc5 19.fe3+-) 17...ed4 18.Ne4 Ne4 19.de4 g5 20.Kg2 Re4 21.Rae1 Bb4 22.Rb1 Ba5 23.Nc1 Nc5 24.Nb3 Nb3 25.Rb3 Re2 26.Rd3 Rc2 27.Rd4 Ra2 28.Rfd1 c6 29.bc6 bc6 30.Rc1 Bb6 31.Rd5 Rf2 32.Kh1 Kc7 33.Rg5 a5 (better is 33...Bd4!?+/–) 34.Rg6+- a4?? (34...Kb7+-) 35.Rcc6 (35...Kd7 36.Rb6+-) 1–0. valpa – Valery_Souchkov, HCL–B2386 playchess.de, 2003.

4.Bg7+- Qh4 5.e3 Nf6 6.Nf3 Qb4 (6...Qg4 7.Bh8 Nbd7 8.Be2+-) 7.Bh8 Ne4 (7...Nbd7 8.Bd3+-) 8.a3 Qa5 (8...Qa4 9.Nd4 Nd7 10.f3 Bd4 11.Bd4+-) 9.Bd3 (better 9.Nc3 Nc3 10.Bc3 Qa4+-) 9...f5 (9...Be7 10.Nc3 Nd7 11.Be4 de4 12.Nd4+-) 10.0-0 (better 10.Ne5 Kd8 11.Qh5 Nd7 12.Nf7 Ke7 13.Be4 fe4+-) 10...b6 (10...Ke7 11.Nd4 Nd7 12.Qh5+-) 11.Ne5 Nd7 12.Qh5 Ke7 13.Qh7 Kd6 (13...Kd8 14.Nc6 Ke8 15.Qg6 Kf8 16.Bg7 Kg8 17.Bh6 Kh8 18.Qg7) 14.Ng6 c6 (14...Qb5 15.Bb5 c6 16.Be5 Ne5 17.Qe7) 15.Be5! Ne5 (15...Ne5 16.Qe7 Mate attack) 16.Qe7 1–0. Massudy (2580) – Nazar_Viktor (2240), lichess.org, 2020.

4.Bg7+- Qh4 5.e3 Nf6 6.Bh8 Ne4 The mate threat is Qxf2 7.Qf3 f6 (7...Bd6 8.Nc3 Nc3 9.Bc3+-) 8.Ne2 Qg5 (8...Nd7 9.Qf4 Qh5 10.Ng3+-) 9.d3 Nd6 10.Qf6 (10.Bf6 Qg6+-) 10...Qf6 11.Bf6 Nd7 (11...Nb5 12.Nf4+-) 12.Bd4 Bb4 (12...Nb5 13.Bc5 Nc5 14.d4+-) 13.Bc3 Bc5 14.d4 Bb6 15.Nf4 Nf6 16.Bd3 Bd7 17.a4 c6 18.bc6 Bc6 (18...bc6 19.Nd2+-) 19.a5 Bc7 20.Ne6 Ke7 (20...Rc8 21.Nc7 Rc7 22.Bb4+-) 21.Nc7 Rc8 22.Nd5 Bd5 23.f3 a6 (23...Bc4 24.e4 Bd3 25.cd3+-) 24.e4 Bc6 25.e5 Nb5 26.ef6 Kf6 27.Bb2 Re8 28.Kf2 h6 29.d5 Ke7 30.dc6 bc6 31.Nc3 Nc3 32.Rhe1 1–0. Schellen,Anton – Chacon,Marc, FICGS, 2006.

4.a4 Nb4?? 5.c3+- c6 (5...Nf6 6.a5+-) 6.cb4 cb5 7.ab5 Bb4?? (7...Nf6+-) 8.Bg7 f6 9.Bh8 Kf7 (9...Nh6 10.Qc2 Qe7 11.e3+-) 10.e3 (better 10.Qc2 f5+-) 10...Qd6 (10...Nh6 11.Qh5 Kg8 12.Qh6 Kh8 13.Bd3+-) 11.Qh5 Ke7 (11...Kf8 12.Qh7 Qe7 13.Qc2+-) 12.Qh7 (12.Qh7 Ke8 13.Qg8 Qf8 14.Qf8 Bf8 15.Bf6+-) 1–0. BeepBeepImAJeep (2695) – vesal_h (2300), lichess.org, 2016.

4.bc6 bc6 5.e3 Nf6 (5...Rb8 6.Bc3+-) 6.c4 (6.Nf3 Rb8 7.Be5 Nd7+-) 6...Bb4 (6...Bd6 7.Nf3+-) 7.Nf3 dc4 (7...0-0 8.Ne5 Qe8 9.Qa4+-) 8.Bc4 Bb7 (8...Rb8 9.0-0+-) 9.0-0 (better 9.Qb3!? Rb8 10.Qb4 Ba6 11.Bf6 Rb4 12.Bd8 Rc4+-) 9...0-0 10.d4 (10.Qc2 Re8+-) 10...Bd6 (10...Rb8 11.Qc2+-) 11.a3 (11.Qc2 Rb8+-) 11...c5 12.Nbd2 cd4 13.Bd4 e5? (13...c5 14.Be5 Be5 15.Ne5 Rb8+-) 14.Be5 Be5 15.Ne5 Re8 (15...Qe7 16.Ndf3 Rfd8+-) 16.Bf7 Kf8 (16...Kh8 17.Be8 Qe8 18.f4+-) 17.Be8 Qe8 18.Ndf3 (18.f4 Rc8+-) 18...Bf3 (18...Rc8 19.Rb1 Be4 20.Rc1+-) 19.Nf3 (19.Qf3 Rc8 20.Nc6 a6+-) 19...Ne4 (19...Rc8+-) 20.Qa4 (20.Rc1 Rc8+-) 20...Rd8 (better 20...Qa4 21.Ne5 Re8-+) 21.Qe8 (21.Qa7!? Rc8+-) 21...Re8 22.Rac1 Nc5 (22...c5+-) 23.Rc5 1–0. BeepBeepImAJeep (2570) – robertoavb (1790), lichess.org, 2017.

4.a4 c5 5.Nf3 Nf6 6.c4 Be7 (6...Bd6!?=+) 7.e3= de3 8.fe3 0-0 9.Be2 a6 10.0-0 ab5 (10...b6 11.Qc2=) 11.ab5 Ra1 12.Ba1 Qa5 (12...Nbd7 13.Qc2+=) 13.Bc3 Qc7 (13...Qd8 14.Qc2+=) 14.d4 (14.Be5!? Bd6 15.Bf6 gf6 16.Qe1+-) 14...Rd8 15.Nbd2 (15.Bd3 b6=) 15...Nbd7 (15...Ng4 16.Qb3 Ne3 17.Ba5 Qa5 18.Qe3-/+) 16.Qa1 (16.Bd3 b6=) 16...Nb6 (better 16...Ng4!? 17.Qa7 Bd6=+) 17.Ne5 cd4 (17...Nbd7 18.Ndf3+=) 18.ed4 Nbd7 19.Ndf3 Ne5 20.Ne5 (worse 20.de5 Bc5 21.Kh1 Ng4-/+) 20...Bd6 21.c5 (better 21.b6!? Qe7 22.Qa5+-) 21...Be5=+ 22.de5 (22.Kh1 Nd5 23.de5 Qc5 24.Bd4=+) 22...Nd7 (better 22...Qc5!? 23.Kh1 Ne4-/+) 23.Bd4 Nc5 24.Rc1 b6 25.Bf3 (25.Qc3!?=) 25...Bb7=+ 26.Bb7 (26.Bc5 bc5 27.b6 Qb8 (worse 27...Qb6 28.Rb1 Qa6 29.Bb7+-) 28.Bb7 Qb7=) 26...Qb7-/+ 27.Bc5 bc5 28.Qa6 (28.Rd1 Rb8 29.Qa6 h5 30.Qb7 Rb7-/+) 28...Qd5 (better 28...Qe4 29.Kh1 Qe5-+) 29.Qc6?? (better 29.Qa5-/+) 29...Qd4-+ 30.Kf1 Qd3 (better 30...Qf4 31.Qf3 Qc1 32.Kf2-+) 31.Kg1 Qe3 32.Kf1 Qc1 33.Kf2 Qc2 (33...Rd2 34.Kg3 Qe1 35.Kh3 g5 36.Qc8 Kg7 37.Qg8 Kg8 38.g3 h5 39.b6 Qf1) 34.Kg3 Rd3 35.Kh4 Qf2 36.Kg4 (36.Kg5 Qf5 37.Kh4 Qf4 38.g4 Qh6) 36...Qe2 (36...Rd4 37.Qe4 Re4 38.Kg5 Qf5) 37.Kh4 (37.Qf3 Rf3 38.gf3 Qh2 39.f4 Qg2 40.Kh4 h5 41.Kh5 Qh3 42.Kg5 Qg3 43.Kh5 g6 44.Kh6 Qf4) 37...g5! 38.Kg5 (38.Kg5 Qe5 Mate attack) 38...h6! 39.Kf6 (39.Kh6 Qe3 Mate attack) 39...Qf2 40.Ke7 Kg7 (40...Qh4 41.Ke8 Qd8) 41.Qe4 (41.Ke8 Rd5 42.g3-+) 41...Qh4 (better 41...Qd4 42.Qd4 cd4-+) 42.Qh4 h5 (42...Kg8 43.Qg4 Kh8 44.Kf6 Rg3 45.Qg3 c4 46.Qg7) 43.Qf6 (43.Qg5 Kh8 44.Kf6 Rf3 45.gf3 c4 46.Qg7) 43...Kg8 (43...Kh7 44.Qf7 Kh6 45.Kf6 Rg3 46.hg3 c4 47.Qg6) 44.Qf7 Kh8 45.Qh5 (45.Kf6 Rf3 46.gf3 c4 47.Qg7) 45...Kg8 (45...Kg7 46.Qf7 Kh8 47.Kf6 Rg3 48.hg3 c4 49.Qg7) 46.Qg6 (46.Qf7 Kh8 47.Kf6 Rg3 48.hg3 c4 49.Qg7) 46...Kh8 47.Qd3 (47.Qd3 Kg7 48.Qg3 Kh6 49.Kf6 c4 50.Qg6; 47.Kf6 Rd7 48.Qe8 Kh7 49.Qd7 Kh6 50.Qg7 Kh5 51.Qg5) 1–0. BeepBeepImAJeep (2655) – Koki22 (2145), lichess.org, 2016.

4.Nf3 c5 5.e3 de3 6.fe3 b6 7.Be2 (7.Bd3 Bb7+/-) 7...Nf6 (7...Bb7 8.0-0 Nd7 9.Na3+/-) 8.Ne5 Bb7? (8...Nbd7 9.Bf3 Ne5 10.Be5+-) 9.Bf3 (better 9.Bh5 Nh5 10.Qh5+-) 9...Bf3+= 10.Qf3 Nbd7 (10...Qd5 11.0-0 Qf3 12.Rf3+=) 11.Nc6 (11.Nd7 Kd7 12.d3 Rc8+-) 11...Qc7+/- 12.0-0 (12.e4!? e5 13.Nc3+/-) 12...Bd6+= 13.g4 (13.g3 0-0+=) 13...Bh2 (13...0-0 14.Kg2=+) 14.Kh1 (better 14.Kg2 h6 15.Na3+/-) 14...Be5?? (better 14...Qg3 15.Qg3 Bg3=+) 15.Ne5+- Ne5 (15...0-0 16.Nc6 Rae8+-) 16.Qa8 Ke7 17.Be5 (better 17.Qh8 Neg4 18.Bf6 gf6 19.Rf4+-) 17...Qe5 (17...Ra8?? 18.Bc7 Ng4 19.Na3+-) 18.Qb7 (18.Qh8!? Ng4 19.Qh7 Qa1+-) 18...Nd7 19.Nc3 h5 20.g5 h4 (20...Qg5 21.Rf4 Qg3 22.Ne2 Qh3 23.Kg1+-) 21.Qe4 (21.Rf4 Rb8 22.Qf3 Rf8+-) 21...Qe4 (21...Qg5 22.Rg1 Qh6 23.Raf1+-) 22.Ne4 f5 (22...Ne5 23.Kg2+-) 23.gf6! gf6 (23...Nf6 24.Ng5 Combination; 23...gf6 24.Rg1 Combination) 24.Rg1 1-0. Lance5500 (2685) - ST0RMY (2020), lichess.org, 2019.

4.e3 c5 5.c4 dc4 (5...Ne7 6.Nf3=) 6.Bc4+= b6 (6...Nf6 7.Nf3+=) 7.Nf3 Bb7 8.0-0 f6 (8...Nf6 9.d4+=) 9.d4 Bd5 (9...a6 10.Nc3 ab5 11.Nb5+-) 10.Qe2 (10.Bd5 ed5 11.Nc3 c4+-) 10...Ne7 (10...Bc4 11.Qc4 Qd5 12.Qc2+-) 11.e4 (11.dc5 bc5 12.Nc3 Bc4 13.Qc4 a6+-) 11...Bc4 12.Qc4 cd4 (better 12...a6!? 13.Nc3 Nc8+-) 13.Nd4+- f5?? (better 13...Kf7 14.f4 Qc8+-) 14.Ne6 fe4 (14...Na6 15.ba6 Rc8+-) 15.Nc7 Kd8 16.Ne6 Ke8 17.Qe4 Qb5 (17...Nbc6 18.bc6 Qd6+-) 18.Nc7 Kf7 19.Qe6 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.e3 Be7?? 5.Bg7+- Bf6 6.Bh8 Bh8 7.d4 e5 8.Nf3 ed4 9.Nd4 Bd4 (9...Qe7 10.Nc3 Qc5 11.Qd2+-) 10.Qd4 Qf5 11.Bd3 Qe6 (11...Qg5 12.g3 h6 13.Qh8+-) 12.Bh7 (12.Qh8 f5 13.Qh7 Ne7+-) 12...Ne7 (12...Nf6 13.Bd3+-) 13.Qh8 Kd7 14.0-0 c6 15.e4! de4 (15...Kc7 16.Nc3 Nd7+-) 16.Rd1 Nd5 17.c4 Kc7 (17...e3 18.cd5 cd5 19.Nc3+-) 18.cd5 cd5 19.Qd4 (19.Nc3 Na6 20.Nd5 Kb8 21.ba6 e3 22.Rdc1 ef2 23.Kf2 f6 24.Qd8 Qd7 25.Rc8 Qc8 26.Qd6 Qc7 27.Qc7) 19...Bd7 (19...Nd7 20.Nc3 Kb8 21.Nd5+-) 20.Na3 1–0. GuestCZCG – GuestHTWK, freechess.org, 2017.

4.e3?? Nf6 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3).

4.e3?? Nf6= 5.Nf3 Nbd7 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.Be2 Nbd7).

4.f4?? Nf6 5.Nf3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 c5 9.bc6 Nc6 10.Be5 (10.e3 Qc7=) 10...Nb4 (10...0-0 11.e3=+) 11.c3 Nc6 12.Bd4 Nd4 13.cd4 Qa5 14.Nc3 (14.e3 Bd7=+) 14...b5-/+ (15.Ne5 Bd7-/+) 0–1. Awad,Marwan – Al_Zendani,Zendan (2345), Ch Arab Clubs (team), 2006.

4.Bg7 Bf6 5.Bh8 Bh8 6.d4 Bf6 (6...e5 7.e3+-) 7.e3 c5 8.c3 Nd7 9.Qc2 cd4 (9...h6 10.Qh7 Kf8 11.Nf3+-) 10.Qh7 dc3 (10...Ne7 11.cd4 e5+-) 11.Qg8 Nf8 12.Ne2 (better is 12.Na3 c2 13.Rc1 Qa5 14.Ke2 Qa3 15.Rc2+-) 12...c2?? (better is 12...Qc7 13.Qg3 Be5+=) 13.Nbc3+- Bc3 14.Nc3 Qf6 15.Kd2 Qf2 16.Be2 d4 17.ed4 e5 18.Raf1 (18.de5 Bf5 19.Raf1 Qd4 20.Kc1 Qc3-+) 18...Qd4 19.Kc2 Be6 20.Bh5 (20.b6!? a6 21.Bh5 0-0-0+-) 20...Qc4 21.Qg7 e4 (21...Rc8 22.Bf7 Bf7 23.Qe5 Be6+-) 22.Qe5 0-0-0 23.b6 (better is 23.Qe4 Rd4 24.Qf3 Rd7+-) 23...Qd3 (23...ab6 24.Qe4 Rd4 25.Qe3+-) 24.Kb2 Qd6 (24...Qd2 25.Kb1 ab6 26.Rc1+-) 25.Qd6 Rd6 26.ba7 Ra6 (26...Rb6 27.Kc2 Ra6 28.Bf7 Ra7 29.Bg8+-) 27.Bf7 Kd7 (27...Ra7 28.Bg8! Kd7 29.Rf8+-) 28.Be6 Ne6 29.Rf7 Kc6 30.Rf6 Kd7 31.Rd1 Kc7 32.Nb5 Kc8 (32...Kb6 33.Re6 Kb5 34.Ra6 Ka6 35.a8Q Kb6 36.Qd8 Kb5 37.Rd5 Kc4 38.Qa5 e3 39.Qc5) 33.Re6! b6 (33...Re6 Theme: Deflection from a8 34.a8Q A classical mating theme) 34.Rc6 Kb7 35.Rc7 Ka8 1–0. Bonetti,Shane – Grynt (2075), ICC, 2002.

4.d3 Nd7 5.Nf3=+.

4.d3 Nf5 5.a3 (5.Nd2 d4=) 5...Bd7 (5...Qd7 6.a4=+) 6.c4= Bc5 7.e4 Bf2?? (better 7...Nd4=) 8.Kf2+- Qh4 9.g3 (9.Kf3!? h5 10.Ne2+/-) 9...Ng3+/- 10.Nf3?? (better 10.hg3 Qh1 11.Bg7 Qh2 12.Bg2+/-) 10...Nh1 (10...Ne4 11.Ke3 Qf2 12.Kf4 g5 13.Kg4 h5 14.Kh3 e5) 11.Ke2 (11.Kg2 Qf2 12.Kh1 Qb2 13.Nbd2-+) 11…Qf2 0-1. Yuris___ (1635) – VizgushinPN, Rated Classical game, lichess.org,2013.

4.e3 Ng6 5.Nf3 Bd6 6.Bg7+= Rg8 7.Bb2 c6 (7...e5 8.c4 e4 9.Ng1 dc4 10.Qc2+-) 8.a4 (8.bc6 Nc6 9.Nc3 a6+=) 8...c5 (8...e5 9.h3+=) 9.c4 (9.Nc3 Nd7+-) 9...dc4 (9...Nd7 10.Nc3 dc4 11.Ne4+-) 10.Bc4 (10.Na3 Nd7+-) 10...Nd7 11.0-0 (11.d4 Nb6 12.Nbd2 cd4 13.Bd4 Nh4+-) 11...Nb6 (11...Nh4 12.g3+=) 12.Be2+- Nd5 (12...e5 13.Nc3+-) 13.Nc3 Nb4 (13...Nc3 14.dc3 e5 15.Bd3+-) 14.Ne4+- Be7 15.d4 f5 (15...cd4!? 16.Bd4 b6+-) 16.Nc5 Bh4 (16...b6 17.Nd3+-) 17.Bc4 (better 17.a5 Be7+-) 17...Nf8 (17...Nd5 18.Nh4 Nh4 19.Qh5 Rg6 20.g3+- (20.Qh7?! Qg5 21.Bd5 ed5 22.Qh8 Kf7+-)) 18.Qb3 Nd5 19.Nh4 Qh4 20.Bd5 ed5 21.Qd5 Qg5 (21...Rg7 22.a5+-) 22.h4 (22.Nb7 Bb7 23.Qb7 Rd8+-) 22...Qg6 (22...Qg7 23.h5+-) 23.h5 (23.Nb7 Bb7 24.Qb7 Rd8+-) 23...Qg5 (23...Qf7 24.Qf7 Kf7 25.Rfc1+-) 24.f4 (24.a5 Rg7+-) 24...Qg4 25.Rf2 (better 25.Ba3 Rg7 26.h6+-) 25...Ne6 (25...Rg7+-) 26.Ne6 Be6 27.Qe6 Kd8 28.Ba3 Qg7 29.h6 Qc7 (29...Re8 30.hg7 Re6 31.g8Q Kd7 32.Qf7 Kc8 33.Qe6 Kc7 34.Rc2 Kd8 35.Qe7) 30.Qg8 Kd7 31.Qf7 Kc8 (31...Kd8 32.Qf8 Kd7 33.Qe7 Kc8 34.Qe8 Qd8 35.Rc1 Kb8 36.Qd8) 32.Qe8 (32.Qe8 Qd8 33.Rc1 Kb8 34.Qd8) 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.a3 cb4 5.cb4 a5 6.Qa4 Bd7 7.Qb3 (7.b5 Na6 8.e3 Rc8=) 7...a4 (7...ab4 8.ab4 Ra1 9.Ba1=+) 8.Qg3 b5 (better 8...Nf6!?=) 9.Bg7+- Bg7 10.Qg7 Qf6 11.Qg3?? (better 11.Qf6 Nf6 12.e3+-) 11...Qa1-+ 12.e3 (12.Qd3 Nc6 13.e3-+) 12...Qb1 13.Ke2 Nc6 (13...Qb2 14.Nf3 Nc6 15.Nd4-+) 14.Nf3 (14.Qg7 d4! 15.d3-+) 14...Nge7 (better 14...Qb2 15.Nd4 Nf6 16.Nb5-+) 15.Nh4 (15.Qg7 Rg8 16.Qc3 Rc8-+) 15...Rg8 16.Qh3 (16.Qc7-+) 16...e5 17.g3 Bh3 18.Bh3 Qh1 0–1. alt20 – vovaua, lichess.org, 2015.

4.bc5 Bc5 5.e3 Nf6 6.Bb5 Bd7 7.Bd7 Nbd7 8.Nf3 Qb6 9.0-0?? (better is 9.Ba3+=) 9...Qb2-+ 10.Na3 (10.Qb3 Qa1 11.Na3 Qf1 12.Kf1-+) 10...Qa3 11.d4 Be7 12.h3 (12.Qb3 Nb6-+) 12...0-0 (12...Rc8 13.Rb1 b6 14.Rc1-+) 13.Qc1 Qa5 14.Qd2 b5 15.Ne5 (15.Qd3 Rfc8 16.Rfc1 Ne4-+) 15...Ne5 16.de5 Ne4 17.Qc2 Qc3 18.Qc3 Nc3 19.a3 (19.f4 f6 20.ef6 Bf6-+) 19...a5 20.Rfe1 (20.Kh2 b4 21.Rfc1 Rfc8 22.ab4 Bb4-+) 20...b4 21.ab4 ab4 22.Ra8 (22.Rac1-+) 22...Ra8 23.Kf1 b3 0–1. C_Artist_Think – fiddler, chessHere.com, 2006.

4.Na4 Nf6 5.c3 (5.Nf3 0-0-+) 5...Ba5 (5...Bd6!? 6.e3-+) 6.Ba3 b6 7.d4? (7.Nf3 c5-/+) 7...Ne4 (better is 7...b5-+) 8.Nb6?? (better is 8.Bb4 Bb4 9.cb4-+) 8...ab6 (better is 8...Bc3 9.Qd2 Bd2 10.Kd1 ab6 11.f3-+) 9.Qa4 (9.Bb4 Nc3 10.Qb3 Bb4 11.Qb4 Na2 12.Qb2-+) 9...Bd7 10.Qc2 (10.Qa5 Ra5 11.Bb4 Qh4-+) 10...Nc3 (10...Bc3 11.Qc3 Nc3 12.Bb4 Na2 13.Nf3-+) 11.Bc1 (11.Qb3 Na2 12.Kd1 Nc3 13.Kc1-+) 11...Ne4 12.Bd2 Nd2 (better is 12...Bd2 13.Qd2 Nd2 14.Kd2-+) 13.Rd1 (13.0-0-0 Ne4 14.e3-+) 13...Nf3 0–1. jaunis111 – Charlemagne, internet, 2007.

4.Nd5 Qd5? 5.Bg7 e5 6.Bh8 +-.

4.Nd5 Bf8 5.Nc3 Nf6 =.

4.e4 c6 (4...d4!? 5.Nce2 e5-/+) 5.ed5 (5.Nd5 Bf8 (worse is 5...cd5 6.Bg7 Nf6 7.Bh8+/–) 6.Nc3 Nf6=) 5...cd5 (5...Nf6 6.dc6 Nc6 7.Nf3+=) 6.Bb5 (better is 6.Nd5!? Bf8 7.Ne3=) 6...Nc6-/+ 7.Nf3 Nge7 8.0-0 a6 9.Bd3 (9.Bc6 Nc6 10.a3 Bd6-/+) 9...0-0 (better is 9...e5 10.Be2 0-0-+) 10.Bh7?? (better is 10.Qe2-/+) 10...Kh7-+ 11.Ng5 Kg8 (better is 11...Kh6 12.Qg4 e5 13.Qh4 Kg6-+) 12.Qh5 Re8 13.Nd5! Qd5 (13...Qd5 14.Qf7 Mate attack; 13...ed5 14.Qf7 Mate attack; 13...Nd5 14.Qf7 Mate attack) 14.Qh7 Kf8 15.Qg7 1–0. guest74 – guest611, ICC, 1999.

4.e3 Nf6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.c4).

4.e3 Nf6 5.b5 Bb7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

4.c3 Bd6 5.Qb3 Ne7 6.Nf3 f6 7.d4 b6 8.e3 0-0 9.Nbd2 Nbc6 10.g3 a6 11.Bh3 (11.c4 dc4 12.Nc4 Bb4 13.Ncd2 Qd7-/+) 11...e5-+ 12.e4?? (better 12.Bc8 Rc8 13.e4-+) 12...Bh3 13.Ng1 (13.ed5 Na5 14.Qc2 Nd5 15.0-0-0-+) 13...Bg2 14.Qd5 (14.c4-+) 14...Nd5 15.ed5 Nb8 16.Ndf3 Bh1 17.de5 fe5 18.0-0-0 Bf3 19.Nf3 Rf3 20.c4 Rf2 21.Rh1 Qg5 (21...Qg5 22.Kb1 Qd2 23.Be5 Qa2 24.Kc1 Qc2) 0-1. kevinsitem – donluis, Rated Classical game, lichess.org, 2013.

4.Nd2 Nf6 5.Ngf3 0-0 6.g3 c6 7.Bg2 Re8 8.0-0 Nbd7 9.c4 e5 10.cd5 cd5 11.Nb3 d4 12.Rc1 Qb6 13.a3 Bf8 14.Qd2?? (better is 14.Nfd2-/+) 14...Qb3-+ 15.Ng5 Nb6 16.Ne4 Nfd5 17.e3 (17.Nc5 Bc5 18.Rc5 Be6-+) 17...Na4 18.Rb1 Nb2 19.Rb2 Qa3 20.ed4 Bb4 (better is 20...ed4 21.Ra2 Qb4 22.Rfa1-+) 21.Qc2 ed4 (better is 21...Qa5-+) 22.Ra2-/+ Qa2! 23.Qa2 Nc3 24.Qc4 Ne2 25.Kh1 a5 26.Ng5 Re7 27.Bf3 (27.Bd5+=) 27...b5?? (better is 27...h6!? 28.Ne4 Be6-+) 28.Qb5 Ba6 (28...Bd7 29.Qb6 Rc8=) 29.Qc6?? (better is 29.Qf5 g6 30.Qh3+/–) 29...Bb7+= 30.Qc4 Bf3 31.Nf3 The isolani on d4 becomes a target 31...Rae8 (better is 31...Bc3!?+=) 32.Nd4+= Nd4 33.Qd4 g6 34.Kg2 Re5 35.Rc1 h5 36.Rc7 R8e6 37.Qf4 f5?? (better is 37...Re7+/–) 38.Qh6+- Be7 39.Rc8 Kf7 40.Qh7 Kf6 41.Qh8 Kg5 (41...Kf7 42.Qg8 Kf6 43.Rf8 Bf8 44.Qf8 Kg5 45.h4 Kg4 46.f3) 42.h4 Kg4 1–0. Jokmin,Alex – Bester,Kazimierz, SN–2010-0-00265, 2010.

4.Nd2 Nf6 5.Ngf3 Nc6 6.g3 Bd7 7.Bg2 Qe7 8.0-0 0-0-0 9.a3 Bc5 10.Nb3 h6 11.d4 Bb6 12.e3 g5 13.h4 (13.Rc1 Rhe8+=) 13...g4 (13...gh4!? 14.Nh4 Na5-/+) 14.Nfd2 h5 (14...Na5 15.Na5 Ba5 16.c4+=) 15.Nb1 (15.c4 Rde8=) 15...Ne4 (15...e5 16.Nc3 e4 17.Na4+=) 16.Nc3 f5 17.Re1 Rdf8 (17...Na5!?-/+) 18.a4+= Kb8?? (better is 18...Nc3!? 19.Bc3 a6+=) 19.Ba3 (19.a5 Na5 20.Na5 a6+-) 19...Nb4? (better is 19...Qf6 20.Ne4 fe4 (20...de4? 21.Bf8 Rf8 22.a5+-) 21.Bf8 Rf8+= (21...Qf8? 22.a5+-)) 20.Rb1?? (20.Ne4 fe4 21.Qd2 a5+-) 20...Rf7 (better is 20...Nc3 21.Qd2 Nb1 22.Rb1 a5-+ (22...Ba4?! 23.Bb4 Qf6 24.Bf8 Rf8 25.Qb4 Bb3 26.Rb3-/+)) 21.Na2?? (better is 21.Ne4 fe4 22.a5+-) 21...Rf6?? (better is 21...c5 22.Nc5 Bc5 23.Nb4 Bd6 24.Na6 Kc8 25.Bd6 Qd6=) 22.Bb4+- Qe8 (22...c5 23.dc5 Bc5 24.Nc5 Nc5+-) 23.Nc3 (23.a5 c5 24.ab6 cb4 25.ba7 Ka7 26.Nb4 Kb8+-) 23...f4?? (better is 23...Ba4 24.Qd3 Bb3 25.Rb3 a5+-) 24.Be4 de4 25.Ne4 Rf7 (25...fg3 26.Nf6 gf2 27.Kf2+-) 26.ef4 (better is 26.a5 fg3 27.fg3 Bc6+-) 26...Rg8 (26...Ba4 27.Ng5 Rd7+-) 27.a5 Bd4 28.Qd4 Ka8 (28...Rg6 29.a6! e5 30.Qe5 Qe5 31.fe5 Ra6 32.Ng5+-) 29.Bc5 (29.Nf6 Qd8 30.Ng8 Qg8+-) 29...a6 (29...Rg6 30.Ba7 Rf5 31.Bc5+-) 30.Ng5 (better is 30.Nf6!? Qd8 31.Ng8 Qg8+-) 30...Rfg7 31.Ba3 Kb8 (31...Qc8 32.Nc5 e5 33.Qe5+-) 32.Nc5 Bc6 (32...Ka8 33.Rb7 Bc6 34.Rbb1+-) 33.Na6 Ka8 34.Nc7! Rc7 35.Ne6 Rc8 (35...Rd7 36.Nc7! Rc7 37.Re8 Re8 38.Qb6+-) 36.Nc7! Rc7 37.Re8 Re8 38.f5 (better is 38.Qb6 Rd7 39.a6+-) 38...Re4 (38...Rd7 39.Qb6 Re5+-) 39.Qd8 Ka7 40.Qc7 (40.Bc5 b6 41.Qc7 Ka8 42.Qc8 Ka7 43.ab6) 40...Re2 (40...Re8 41.Bc5 Ka8 42.a6 Re1 43.Re1 b6 44.Qc6 Ka7 45.Qb7) 41.Bc5 Ka6 42.Qb6 1–0. Ole P – pieeater, ChessWorld.net, 2012.

4.a3!?+= A) 4...Nbd7 A1) 5.Nf3 a5 (5...Bd6 6.e3 a5 7.c4 dc4 8.b5 Nb6 9.Nbd2 c3 10.Bc3 0-0=) 6.b5 Bd6 7.e3 0-0 8.Bd3 c6 9.Nc3 c5 10.dc5 Nc5+=; A2) 5.Nd2 a5 (5...Bd6 6.c4 0-0 7.e3 a5 8.c5 Be7 9.Bd3 c6 10.Ngf3 ab4=) 6.b5 Nb6 7.e3 Na4 8.Qc1 c5 9.c4 Nb2 10.Qb2 Bd7+=; A3) 5.e3 a5 (5...Bd6 6.c4 0-0 7.c5 Be7 8.Bd3 a5 9.b5 b6 10.c6 Nb8+=) 6.b5 Nb6 7.Nf3 Bd6 8.Bd3 0-0 9.0-0 Na4 10.Bc1 Bd7=; B) 4...a5 B1) 5.ba5 Ra5 (5...Be7 6.e3 0-0 7.Bd3 Ra5 8.Nf3 Bd7 9.Nbd2 b5 10.0-0 Bd6=) 6.e3 Bd6 7.Bd3 0-0 8.Nf3 b6 9.Nbd2 Ba6 10.c4 Qe7=; B2) 5.b5 Bd6 (5...a4 6.e3 Bd6 7.c4 dc4 8.Bc4 Nbd7 9.Nf3 Nb6 10.Bd3 0-0=) 6.c4 0-0 7.c5 Be7 8.Nf3 Nbd7 9.e3 Ne4 10.Bd3 c6=; C) 4...Bd6 C1) 5.Nf3 a5 (5...Bd7 6.e3 a5 7.b5 c6 8.a4 0-0 9.Bd3 Ne4 10.Ba3 Ba3=) 6.b5 Nbd7 7.e3 0-0 8.Bd3 c5 9.dc5 Nc5 10.0-0 b6=; C2) 5.Nd2 a5 (5...0-0 6.c4 a5 7.c5 Be7 8.b5 a4 9.e3 e5 10.Bd3 e4=) 6.c4 dc4 7.Qa4 Bd7 8.b5 c6 9.Nc4 Be7 10.b6 Nd5+=; C3) 5.e3 0-0 (5...Nbd7 6.c4 0-0 7.c5 Be7 8.Bd3 a5 9.b5 Ne4 10.Nf3 c6=) 6.c4 a5 7.c5 Be7 8.Nf3 ab4 9.ab4 Ra1 10.Ba1 Nbd7=; D) 4...Bd7 D1) 5.Nf3 a5 (5...Bd6 6.e3 0-0 7.Bd3 a5 8.b5 c6 9.a4 Qe7 10.0-0 b6=) 6.ba5 Ra5 7.e3 Bd6 8.Bd3 0-0 9.Nbd2 b5 10.Qe2 c6=; D2) 5.Nd2 a5 (5...Bb5 6.Ngf3 Bd6 7.Ne5 0-0 8.c4 Bc4 9.Ndc4 dc4 10.Nc4 Nc6=) 6.Bc3 Bd6 7.e3 Nc6 8.b5 Na7 9.a4 c6 10.bc6 Nc6+=; D3) 5.e3 a5 (5...Bd6 6.c4 0-0 7.c5 Be7 8.Bd3 a5 9.b5 c6 10.b6 e5=) 6.b5 c6 7.Nc3 Bd6 8.Bd3 0-0 9.Nf3 cb5 10.Nb5 Bb5=.

4.Ba3 A) 4...Nc6 5.c3 (5.b5 Ba3 6.Na3 Qe7 7.bc6 Qa3 8.Nf3 Qc3 9.Nd2 bc6 10.e3 c5-/+) 5...a6 (5...Ne4 6.Nf3 Bd7 7.b5 Ba3 8.Na3 Ne7 9.Qb3 c5 10.bc6 Nc6+=) 6.Nf3 Bd6 7.e3 e5 8.b5 Ba3 9.Na3 ab5 10.Nb5 e4+=; B) 4...Bd6 B1) 5.e3 Qe7 (5...e5 6.b5 Ba3 7.Na3 Qe7 8.Nb1 Qb4 9.c3 Qb2 10.Nd2 Nbd7+=) 6.c3 Nbd7 7.Nf3 e5 8.Be2 e4 9.Nfd2 0-0 10.0-0 a6-/+; B2) 5.Nf3 Qe7 (5...Ne4 6.c4 dc4 7.Qc2 Nf6 8.e4 Nc6 9.Bc4 0-0 10.0-0 Nb4+=) 6.c3 Nbd7 7.Qa4 c6 8.b5 c5 9.e3 0-0 10.Be2 Rd8+=; B3) 5.c3 Ne4 (5...Bd7 6.e3 Qe7 7.Nf3 a5 8.Qb3 a4 9.Qc2 0-0 10.Bd3 b5=) 6.Nf3 0-0 7.e3 a5 8.Qc2 ab4 9.Bb4 c5 10.dc5 Nc5+=; C) 4...a6 C1) 5.e3 Bd6 (5...b5 6.Nf3 Nc6 7.c3 Bd6 8.Bd3 0-0 9.0-0 e5 10.de5 Ne5+=) 6.Nf3 0-0 7.Bd3 Nc6 8.c3 e5 9.de5 Ne5 10.Ne5 Be5-/+; C2) 5.Nf3 Nc6 (5...Bd6 6.e3 Nc6 7.c3 e5 8.b5 Ba3 9.Na3 ab5 10.Nb5 e4+=) 6.c3 Bd6 7.e3 e5 8.b5 Ba3 9.Na3 ab5 10.Nb5 e4+=; D) 4...Qd7 D1) 5.e3 Qa4 6.Bd3 Bb4 7.Bb4 Qb4 8.Qd2 Nc6 9.c3 Qe7 10.Nf3 e5-/+; D2) 5.Nf3 Qa4 (5...Ne4 6.c3 Bd6 7.e3 a6 8.Bd3 Qc6 9.Qc2 Nd7 10.c4 0-0=) 6.e3 Ne4 7.Bd3 a5 8.0-0 ab4 9.Bb2 Nd7 10.a3 Qc6-/+; D3) 5.c3 Bd6 (5...Ne4 6.Nf3 Bd6 7.e3 Qe7 8.Bd3 a5 9.Qa4 Bd7 10.Qb3 a4=) 6.Nf3 0-0 7.e3 Qe7 8.Bd3 Nbd7 9.Qc2 a5 10.0-0 e5+=.

4.b5 A) 4...Bd7 A1) 5.a4 a6 (5...Ne4 6.Nd2 Nd6 7.e3 a6 8.ba6 Na6 9.Ngf3 Be7 10.Be2 Nb4=) 6.e3 ab5 7.ab5 Ra1 8.Ba1 Ne4 9.Nf3 c6 10.Bd3 Qa5+=; A2) 5.e3 a6 (5...c6 6.a4 cb5 7.ab5 Qb6 8.Qd3 a6 9.Qb3 Bd6 10.Bd3 0-0=) 6.ba6 Na6 7.Nf3 Be7 8.Be2 0-0 9.0-0 Bd6 10.Nbd2 b5+=; B) 4...a6 B1) 5.ba6 b6 (5...Na6 6.e3 Ne4 7.Nf3 Bd6 8.Nbd2 Nd2 9.Qd2 0-0 10.c4 b6+=) 6.Nf3 Ba6 7.a4 Bb4 8.c3 Ba5 9.Nbd2 0-0 10.Nb3 Nc6+=; B2) 5.a4 Bd6 (5...ab5 6.ab5 Bb4 7.c3 Ra1 8.Ba1 Bd6 9.e3 0-0 10.c4 dc4+=) 6.e3 ab5 7.ab5 Ra1 8.Ba1 0-0 9.Bd3 c6 10.Nf3 cb5+=; B3) 5.e3 Bd7 (5...ab5 6.Bb5 Bd7 7.Bd3 Nc6 8.a3 Bd6 9.Nf3 0-0 10.Nbd2 Qe7+=) 6.ba6 Na6 7.Nf3 Be7 8.Be2 0-0 9.0-0 b5 10.Ne5 c5+=; C) 4...c6 C1) 5.a4 Ne4 (5...Bd7 6.e3 cb5 7.ab5 Qb6 8.Qd3 a6 9.Qb3 Bd6 10.Nf3 0-0=) 6.e3 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Nbd2 Bb4+=; C2) 5.bc6 Nc6 6.e3 Qb6 7.Bc3 Ne4 8.Bd3 Nc3 9.Nc3 Qb2 10.Nb5 Bb4+=; C3) 5.e3 Ne4 (5...Bd7 6.a4 cb5 7.ab5 Qb6 8.Qd3 a6 9.Qb3 Bd6 10.Bd3 0-0=) 6.a4 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Nbd2 Bb4+=; D) 4...Ne4 D1) 5.Nf3 c6 (5...Bb4 6.c3 Bd6 7.Nbd2 a6 8.e3 Nd2 9.Qd2 0-0 10.c4 dc4=) 6.Nbd2 cb5 7.e3 Nd6 8.Qb1 Qa5 9.Bd3 Nc4 10.c3 f5-/+; D2) 5.Nd2 Bb4 6.c3 Bc3 7.Bc3 Nc3 8.Qb3 Ne4 9.Ne4 de4 10.e3 0-0+=; D3) 5.e3 c6 (5...a6 6.Nf3 Bd7 7.a4 ab5 8.ab5 Ra1 9.Ba1 c6 10.Bd3 Qa5+=) 6.a4 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Nbd2 Bb4+=.

4.h3 Bb4-+ 5.c3 (5.Bc3 Be7 (5...Bd6 6.e3 0-0 7.Nf3 Nbd7 8.Bd3 Ne4 9.Bb2 Qf6 10.Nbd2 Nd2-/+) 6.e3 0-0 7.Nf3 Ne4 8.Bd3 Nc3 9.Nc3 Bb4 10.Kd2 c5-+; 5.Nd2 Ne4 (5...0-0 6.e3 Bd7 7.Bd3 a6 8.a3 Ba5 9.Qe2 Bd2 10.Kd2 Bb5-/+) 6.Ngf3 0-0 7.e3 c5 8.dc5 Nc3 9.Qc1 Nd7 10.a3 Ba5-+) 5...Bd6 (5...Be7 6.e3 c5 7.dc5 0-0 8.c4 Bc5 9.cd5 Nd5 10.Nd2 Nc6-/+) 6.e3 (6.Ba3 Ba3 7.Na3 Ne4 8.Rc1 c5 9.e3 Qa5 10.Qb3 0-0-+) 6...Nbd7 (6...c5 7.dc5 Bc5 8.c4 0-0 9.cd5 Nd5 10.Nc3 Bb4-/+) 7.Bb5 (7.Nf3 0-0 8.c4 c5 9.Nc3 Qa5 10.Qd2 dc4-/+) 7...c6 (7...0-0 8.Nf3 Qe7 9.0-0 c6 10.Be2 e5-+) 8.Bd3 b5 (8...e5 9.Ba3 Ba3 10.Na3 e4-+) 9.Nf3 (9.a4 b4 10.cb4 Bb4-/+) 9...a5 (9...e5 10.de5 Ne5-/+) 10.a4 b4 (10...Ba6-/+) 11.cb4 Bb4 12.Nfd2 Bd2 13.Qd2 0-0 14.0-0 Re8 15.Nc3 e5 16.de5 Ne5 (16...Re5?! 17.Ne2 Rg5 18.Rac1=) 17.Be2 Bf5 18.Bd1 (18.Rac1 Qe7-/+) 18...Qd7 19.Re1 Bh3 (better is 19...Nc4 20.Qc1 Rab8-+) 20.Ne2?? (20.gh3 Nc4 21.Qc2 Qh3 22.Bc1-+) 20...Ne4 (20...Bg2 21.Be5 Qh3 22.Ng3 Re5 23.f4 Qg3 24.Qf2-+) 21.Qd4?! (21.Qc2 Bf5 22.Be5 Re5 23.Nd4-+) 21...c5 22.Qe5 Re5 23.Be5 Bg2! 24.Kg2 Qg4 25.Ng3 Qg5 26.Bf4 Qf6 27.Nh5?? (27.Rc1 g5 28.Ne4 de4-+) 27...Qg6 (better is 27...Qa1 28.Rf1 Qc3-+) 28.Ng3 Qf6 29.Rb1?? (29.Nh5 Qa1 30.Rf1-+) 29...Ng3 30.Bg3 d4 31.Rb7 de3 32.Re3 Qc6 33.Bf3 Qa4 34.Rbe7 Rd8 35.Bc7 Rf8 36.Bg4?? (better is 36.R3e5 h6 37.Rc5=) 36...Qg4-+ 37.Rg3 Qb4 38.Bd6 a4 39.Rge3 Qb6 40.Re8 (40.Bg3-+) 40...Qd6 41.R8e5 (41.R8e4 c4! 42.f3 c3-+) 41...f6 (better is 41...a3 42.f4 a2 43.Re1-+) 42.Re6 Qd5 43.Kf1 c4 (better is 43...a3 44.Kg1-+) 44.Ra6 Qh1 45.Ke2 Rd8 46.Ra4 Qd1 0–1. West Islander – diggerdogwoofwoof, ChessWorld.net, 2011.

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

4.a3 f5 5.c4 Nf6 6.Nf3 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

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

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

4.c4 f5 5.Nf3 Nf6 6.a3 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

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

4.Nf3 f5 5.c4 Nf6 6.a3 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

4.a3 a5 5.b5 b6 6.Nf3 Bb7 7.Be2 Nd7 8.0-0 Ngf6 9.d4 Be7 10.a4 0-0-0?? (better 10...Qb4 11.Ra2 c6+=) 11.Ba3+- Nc5 12.dc5 Qd7 (12...bc5 13.Bb2 Ng4+-) 13.c6 Bc6 1–0. DEFFM – DEADCROSS, freechess.org, 2018.

4.a3= a5 5.b5 Bd7 6.Nf3+= f6 (6...Nf6 7.Be5 Qb6 8.Nc3+=) 7.Nh4 (7.c4 Nh6+=) 7...Qc5 (7...Ne7 8.c4=) 8.Nc3 (8.Bd4 Qe7=) 8...Qb6 (8...Nh6 9.d4 Qb6 10.Na4+=) 9.Bd3 (better is 9.Qh5 Kd8 10.Be2+=) 9...c6? (better is 9...Ne7+=) 10.Qh5+- Kd8 11.Na4 (11.Bh7 Be8 (11...cb5? 12.Ng6 Be8 13.Nd5+-) 12.Ng6 A) 12...cb5? 13.Nd5 Qc5 A1) 14.Nf8?! Qf8 (14...Bh5?? 15.Ne6 Kd7 16.Nc5 Kd6 17.Bg8 Rg8 18.Nb6+-) 15.Nf4 Bh5 16.Ne6 Ke8 17.Nf8 Kf8=; A2) 14.Bd4 Bg6 15.Qg6 (15.Bg6?! Qd4 16.ed4 Rh5+=) 15...Qd5 16.Bg8+/–; B) 12...Bd6+=) 11...Qc7 12.Ng6! Be8 (12...hg6 13.Qh8 Pinning (13.Qh8 Deflection)) 13.Nf8 Bh5 14.Ne6 Kd7 (14...Kc8 15.Nc7 Kc7 16.Nc5+-) 15.Nac5 (worse is 15.Nc7 Kc7 16.b6 Kd6+-) 15...Kc8 16.Nc7 Kc7 17.Ne6 Kb6 (17...Kc8+-) 18.Bd4 c5 19.Bc5 1–0. Wall,Bill – Happy1, internet, 2004.

4.a3= a5 5.b5 Nd7 6.Nf3=.

4.a3= a5 5.Nc3 e5=.

4.a3 b5? 5.Nf3 (5.Bb5!? c6 6.Be2+-) 5...Be7?? (better 5...a6+=) 6.Bg7+- (6.Bg7 Bf6 7.Bh8 (7.Bb5?! c6 8.Bf6 Nf6+-) 7...Bh8 8.d4+- (8.Bb5?! c6 9.Bc6 Nc6+-); 6.Bb5?! Kf8+-) 1–0. GuestCWWF – GuestKPPY, freechess.org, 2016.

4.a3 c5 5.bc5 Qc5 6.Nf3 f5 (6...Nc6!?+=) 7.Bd4+- Qd6 8.c4 g6?? (better 8...Nc6+-) 9.Bh8+- dc4 (9...Nd7 10.cd5 ed5 11.Nc3+-) 10.Bc4 h6 (10...a6 11.Nc3+-) 11.Nc3 g5 (11...Nc6 12.Nb5 Qe7 13.Rc1+-) 12.Ne5 (better 12.Nb5 Qe7 13.Be5+-) 12...Qb6 (12...g4 13.h3 Nc6 14.Nc6 bc6 15.hg4 Ne7+-) 13.Qh5 Kd8 14.Qf7 Bd6 15.Qg8 Kc7 16.Nb5 Qb5 17.Bb5 a6 18.Qf7 Kb6 (18...Bd7 19.Bd7 b5 20.Bb5 Nd7 21.Qd7 Kb6 22.Nc4 Kc5 23.Qc6) 19.Nc4 Kb5 (19...Kc5 20.Bd4 Kb5 21.Nd6 Ka4 22.Nc8 Nc6 23.Nb6 Ka5 24.Qb7 Rc8 25.Nc4 Ka4 26.Bc3 Nd4 27.Qb4) 20.Nd6 Kc5 (20...Ka4 21.Nc8 Nc6 22.Nb6 Ka5 23.Na8 h5 24.Qb7 Ka4 25.Qc6 Kb3 26.Nb6 e5 27.Qc3) 21.Rc1 Kd6 (21...Kd5 22.Nc8 Ra7 23.Nb6 Ke4 24.Qe6 Kd3 25.Qf5) 22.Qc7 Kd5 23.Qe5 1–0. GuestSQVP – GuestJYPK, freechess.org, 2019.

4.b5 Qb4 5.Bc3 (5.Ba3 Qa5 6.Bf8 Kf8=) 5...Qc5 (5...Qd6 6.f4=) 6.Nf3 Nf6. GuestCKBV – zainazure, freechess.org, 2019.

4.Nf3 c5?? 5.Bg7+- cb4 6.Bh8 f6 (6...Nf6 7.a3+-) 7.Nd4 Qe7 (7...Nc6 8.Qh5 Kf8 9.Bd3+-) 8.Nb5 h6 (8...Bc5+-) 9.Qg4 Na6 (9...Qh7 10.Nd6 Kd7 11.Qg3 Qh8 12.Nf7+-) 10.Qg8 Kd7 11.Nd6 Qd6 12.Bf6 Nc5 13.Bb5 Kc7 14.d4 Ne4 15.Be5 Qe5 16.de5 a6 17.Qf7 Kb6 18.Bd3 Nc5 19.Qf8 Nd7 20.Qd6 Ka7 21.Qe6 Nc5 22.Qd5 Nd3 23.cd3 Bf5 24.Qc5 Kb8 25.Nd2 Bd3 26.Qd6 Ka7 27.Qd3 (27.Qd4 Kb8 28.Qd3 Ka7 29.Qd4 Kb8 30.Nc4 b3 31.ab3 Kc7 32.Qd6 Kc8 33.Nb6) 27...Rd8 28.Qd8 a5 (28...h5 29.Rd1 b5 30.Nc4 Kb7 31.Rd7 Kc6 32.Rc7) 29.Nc4 Ka6 (29...a4 30.Qb6 Kb8 31.0-0-0 b3 32.Rd8) 30.Qa5 1–0. GuestVKML – GuestFPKS, freechess.org, 2020.

4.Nf3 Nf6=+.

4.Bg7+- Nc6 5.Bh8 f6 (5...Nb4 6.Nf3+-) 6.Qh5 Kd7 7.Qh7 (7...Nce7 8.a3+-) 1–0. Pierred (2250) – Goggi, Rated game, 5m + 0s, 2005.

4.Bg7+- f6 5.Bh8 Qe7 6.c4 c6 (6...Bb4 7.Qg4 Nh6 8.Qh5 Nf7 9.Qh7 dc4 10.Bc4+-) 7.c5 Bc7 8.Qg4 (8.Qh5 Kd8+-) 8...Qf7 9.d4 (9.Qg7 Qg7 10.Bg7 Kf7+-) 9...Na6 (9...Ne7 10.Bd3 Ng6 11.Bg6 hg6 12.e4+-) 10.Ba6 ba6 11.Ne2 (11.Nc3 Rb8 12.Rb1 e5+-) 11...h5 (11...a5 12.ba5 Ba5 13.Nbc3+-) 12.Qh4 Bd8 (12...Rb8 13.a3+-) 13.Ng3 Qh7 (13...a5 14.b5 cb5 15.Qh5+-) 14.Qh5 Qh5 15.Nh5 Be7 (15...a5 16.b5! cb5 17.e4+-) 16.0-0 (16.Nc3 Kf7+-) 16...Kd7 (16...a5 17.ba5 Kf7 18.g4+-) 17.Nc3 Kc7 (17...Rb8 18.Rab1+-) 18.Nf4 (18.e4 Rb8 19.Rab1 Bd7+-) 18...Bd7 19.h4 (19.e4 de4 20.Ne4 Kd8+-) 19...Nh6 20.Ng6 Rh8 (20...Nf7 21.Ne7 Nh8 22.e4 de4 23.Ne4+-) 21.Ne7 (better 21.Nh8 Be8 22.Ne2 e5+-) 21...Be8 22.e4 (22.a4 Rh7 23.Nc6 Bc6+-) 22...Kd7 (22...de4 23.h5 f5 24.Ng6 Bg6 25.hg6+-) 23.Ned5! cd5 (23...cd5 24.ed5 Decoy; 23...ed5 24.ed5 Decoy) 24.ed5 Nf5 (24...ed5 25.Nd5 Ng8 26.g3+-) 25.de6 Ke7 (25...Ke6 26.d5 Kd7 27.g3+-) 26.Rfe1 Nd4 27.Nd5 Kd8 (27...Kf8 28.Re4 Nf5 29.Nf6 Rh4 30.Rh4 Nh4 31.Ne8 Ke8 32.c6+-) 28.Rad1 Nc2 29.Re2 Na3 30.e7 Kc8 31.Nf6 Bb5 32.Red2 Nc4 33.Rd8 Rd8 34.ed8Q (34.ed8Q Kb7 35.Qe7 Bd7 36.Rd7 Kc6 37.a4 a5 38.b5) 1–0. GuestVRKP – GuestKMNS, freechess.org, 2019.

4.a3 a5 5.b5 Qc5 6.Nf3 f6 (6...Nf6 7.d4 Qa7 8.c4+-) 7.Be2 e5 (7...Nd7!?+-) 8.d4+- Qd6? (better 8...ed4 9.Nd4 Ne7+-) 9.de5 fe5 10.Be5 Qg6 (10...Qd8 11.Nc3 Nd7 12.Qd5+-) 11.0-0 Bh3 (11...Nf6 12.Bc7 Qf7 13.Bf4+-) 12.Nh4 Qg5 13.Qd5 (better 13.Bg3 Be6 14.Nc3+-) 13...Qh4 (13...c6 14.Qe4 Be7+-) 14.Qb7 Nc6 (14...Nd7 15.Qa8 Qd8+-) 15.Qc6 Kf7 16.Bc4 Ke7 17.Rd1 Rd8 18.Rd8 Kd8 (18...Qf2 19.Kf2 Kd8 20.Qc7 Ke8 21.Bf7) 19.Qc7 Ke8 20.Bf7 1–0. DEFFM – drzach, freechess.org, 2019.

4.a3= h5 5.Nf3+= h4 6.Nc3 (6.Be2 h3+=) 6...c6 (6...Nf6 7.Be2=) 7.d4 (7.Be2 Nf6+=) 7...f6 (7...Nf6 8.Bd3+=) 8.Bd3+= Qf7 (8...h3 9.g3+=) 9.0-0 (9.h3 g5+/–) 9...h3 10.g3 g5 (10...Nd7 11.e4+/–) 11.e4 g4 12.Nd2 de4 (12...Bh6 13.Nb3+/–) 13.Nce4 f5 14.Nc5 b6 (better is 14...Nf6!?+/–) 15.Ne6!+- Be6 (15...Be6 16.d5 Decoy; 15...Qe6 16.Re1 Pinning (16.Re1 Decoy)) 16.d5! Rh6 (16...cd5 17.Bh8 Discovered attack; 16...Bd5 17.Bh8 Discovered attack) 17.de6 Re6 18.Bc4 c5?? (18...Ne7 19.Be6 Qe6+-) 19.Be6 Qb7 (19...Qe6 20.Re1 Qe1 21.Qe1 Ne7 22.bc5+-) 20.f3 Nh6 21.Qe2 (better is 21.Re1 Be7+-) 21...Nc6 (21...gf3 22.Rf3 Be7 23.Re1+-) 22.Bd5 Be7 23.Qe6 Qa6 (23...Rc8 24.Qh6 cb4 25.ab4 b5+-) 24.Bc6 1–0. Trkn – BABY HUEY, itsyourturn.com, 2001.

4.b5 a6 5.a4 ab5 6.ab5 (better 6.Bb5 Bd7 7.Nf3=) 6...c6?? (better 6...Ra1 7.Ba1 Nd7=) 7.Ra8+- Qc7 (7...Qd6 8.Nf3 f6 9.c4+-) 8.b6! Qd6 (8...Qb6 9.Rb8 Deflection) 9.Ba3 c5 (9...Qd8 10.Bf8 Kf8 11.Rb8+-) 10.d4 (10.Nc3!? Ne7 11.Nb5 Qb6 12.Rb8 f6+-) 10...Ne7 (10...Qb6 11.Nc3 c4 12.Rb8+-) 11.Bc5 (11.Bc5 Qd7 12.Rb8+-) 1–0. GuestBZDR – GuestXMTQ, freechess.org, 2019.

4.Be2?? Bf6 5.d4 c6 6.c4 Nd7 7.Nf3 b6 8.0-0 Ne7 9.Nbd2 Bb7 10.Rb1 0-0 11.Ba3 Re8 12.c5 Qc7 13.e4 Ng6 14.e5 Be7 15.Bd3 a5 (better is 15...Nf4!? 16.Qc2 Nd3 17.Qd3 f6=) 16.Bg6 fg6 17.b5 (17.cb6 Qd8+/–) 17...cb5 18.Rb5 (better is 18.cb6!? Nb6 19.Be7 Qe7 20.Rb5=) 18...bc5 19.Qb1 (19.Rb2 Ba6 20.Re1 Rf8-/+) 19...Rab8 (better is 19...Ba6!?-+) 20.Rc1 c4 (better is 20...Bc6!? 21.Rb8 Rb8=+ (< 21...Qb8 22.Nb3=)) 21.Be7= Re7 22.a4 (better is 22.Qb2!?=) 22...Bc6-/+ 23.Rb8 Qb8 24.Qc2 Nb6 25.Rb1 Rb7 26.h3 (better is 26.Ra1!?-/+) 26...Na4-+ 27.Rb7 Qb7 28.Qc3?? (28.Nb1-+) 0–1. bashful – binda, Live Game Caissa's Web, 2004.

4.Bg7+- Bb4? 5.Bh8 Bd7 (5...Nf6 6.Nf3+-) 6.Bb2 (better 6.Qg4 Bd2 7.Nd2 Ne7+-) 6...c5 (6...Nf6 7.Nf3+-) 7.a3 Ba5 8.Qh5 (better 8.Qg4 Ne7 9.Qg7+-) 8...Qf6 (8...h6+-) 9.Bf6 Nf6 10.Qg5 (10.Qh6 Ke7+-) 10...Ke7 11.Nf3 Nc6 12.Bb5 (12.Qh4 Rg8 13.Ng5 Rh8+-) 12...a6 (12...Rg8 13.Qh6+-) 13.Bc6 bc6 14.Ne5 h6 15.Qg7 (better 15.Qh4 Rg8 16.Nd7 Kd7 17.Qf6 Ke8+-) 15...Rb8 16.Qf7 Kd6 17.Qf6 d4 18.Nc4 Kc7 19.Na5 1–0. GuestKVBT – rakkahan, freechess.org, 2017.

4.Bg7+- Bf6 5.Bh8 Bh8 6.c3 Nf6 7.d4 Bd7 8.Nf3 Nc6 9.Nbd2 Bg7 (9...h6 10.b5 Ne7 11.Bd3+-) 10.Bd3 Qe7 11.0-0 (11.b5 Nd8+-) 11...0-0-0 (11...e5 12.b5 e4 13.bc6 Bc6 14.Ne5 ed3 15.Nc6 bc6 16.Qb1+-) 12.b5 Na5 (12...Nb8 13.Qa4 a6 14.Rab1+-) 13.Qa4 b6 14.Nb3 Qd6 (14...Nc4 15.Bc4 dc4 16.Qa7 Bb5 17.Nbd2+-) 15.Ne5 (15.Na5 ba5 16.Ne5 Be8+-) 15...Rf8 (15...Be8 16.Na5 ba5 17.Qa5+-) 16.Na5 Kd8 (16...ba5 17.Qa5 Qb6+-) 17.Nb7 (17.Nb7 Ke7 18.Nd6 cd6 19.Nc6 Bc6 20.bc6+-) 1–0. michaelbuss (2785) – crhill, ChessWorld.net, 2010.

4.Bg7+- Bf6 5.Bh8 Bh8 6.Nc3 Nc6 7.Nf3 e5 8.Bb5 Bd7 9.Ne5 Be5 10.Qf3 Qf6 11.Qd5 0-0-0 12.Qb3 Bc3 13.dc3 Bg4 14.0-0 Nge7 15.Rad1 Bd1 16.Bc6 Nc6 17.b5 Ne5 18.Qb1 Bh5 19.f4 Ng4 20.h3 Ne3 21.Re1 Qc3 22.Re3 Qe3 23.Kh2 Rd2 24.Qg1 Qf4 25.Kh1 Bf3 26.b6 Rg2 0–1. Nautiluschess – Charitable, ICS blitz, 2001.

4.Bg7+- Bf6 5.Bh8 Bh8 6.d4 Qd6 7.c3+-.

4.Bg7+- Bf6 5.Bh8 Bh8 6.d4 Ne7 7.Qh5 Ng6 (7...e5 8.Qh7 Bf6 9.Nf3+-) 8.Qh7 Qd6 (8...Nd7 9.Qg8 Ndf8 10.Bd3+-) 9.Qg8 Ke7 (9...Qf8 10.Qf8 Nf8+-) 10.Qc8 Qb4 11.Nd2 Nc6 (11...Qc3 12.Rb1 b6+-) 12.Qa8 (12...Qc3 13.Rc1+-) 1–0. kamret (2200) – chess_master2008 (1790), GameColony.com, 2003.

4.a3 Nbd7 5.h4 h6 6.g4 a6 7.Bg2 c6 8.e3 Qc7 9.Ne2 Ng8 10.0-0 Ne7 11.d3 c5 12.Nd2 cb4 13.ab4 Ng6 14.h5= Ne7 15.c4 dc4 16.dc4 Nc6 17.b5 Nce5 18.Rc1 Nd3 19.Rb1 Nb2 20.Rb2 ab5 21.cb5 Be7 22.Rc2 Qb6 23.Nd4 Bf6 24.Nc4 Qc5? 25.Ne5?? Qe5-+ 26.e4 Qd4 27.Kh1 Qd1 28.Rd1 0-0 29.f4 Be7 30.e5 Nb6 31.Rc7 Bd8 32.Rcc1 Nd5! 33.Rf1 Ne3 34.Rfe1 Ng2 35.Kg2 b6 36.Red1 Bb7 37.Kf2 Bd5 38.Ra1 Be7 39.Rdc1 Bc5 40.Kf1 Rfb8 41.Ra6 Ra6 42.ba6 Ra8 0–1. cogit – mrgeorge, kurnik, 2011.

4.a3 Be7 5.e3 0-0 6.d4 b6 7.Bd3 c5 8.bc5 bc5 9.c3 cd4 10.cd4 Nc6 11.Ne2 a5 12.0-0 Ba6 13.Ba6 Ra6 14.Qd3 Qb6 15.Bc3 Ra7 16.Nd2 Rb7 17.Rfb1 Qc7 18.Rb7 Qb7 19.Rb1 Qc7 20.Nb3 Rb8 21.Nc5 Bc5 22.dc5 Nd7 23.Rb8 Qb8 24.Qa6 Qc7 25.Nd4 Nc5?? 26.Qc6+- Qc6 27.Nc6 Na4?! 28.Ba5 1–0. amator111 (1695) – elsh1403, kurnik, 2011.

4.b5 g6 5.g3 Bg7 6.Bg2 0-0 7.h4 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 c6 11.Nc3 Qa5 12.d4 Nfd7 13.e3 cb5 14.Nge2? b4-+ 15.Nd5 ed5 16.0-0 Nb6 17.Nf4 Be6 18.Ne6 fe6 19.f4 N8d7 20.g4 Ra8 21.Bb2 Nc4 22.Bc1 Qc7 23.Qf3 Rf8 24.Qe2 b5 25.e4 Qd6 26.e5 Qc6 27.g5 Ra8 28.Bh3 Nf8 29.Qg4 Ra1 30.Qf3 Kf7 31.c3 b3 32.h5 b2 33.Be3 b1Q 34.h6 Bh8 35.Rb1 Rb1 36.Kg2 Ne3 37.Qe3 Rb3 38.Qd2 Rc3 39.Bg4 Rc2 40.Qc2 Qc2 41.Kg3 Nd7 42.Bf3 Qc3 43.Kg4 Qd4 (43...Qd4 44.Kh3 Qf4 45.Kg2 Be5 46.Kg1 Qg3 47.Kf1 Qf3 48.Kg1 Bd4 49.Kh2 Qg4 50.Kh1 Qh3) 0–1. cogit – mrgeorge, kurnik, 2011.

4.b5 g6 5.h3?? Bg7?? 6.g4?? 0-0 7.Bg2?? a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 c6 11.Nc3 Qa5 12.g5 Nfd7 13.d4 b6 14.e3 Bb7 15.Nge2 cb5 16.0-0? b4-+ 17.Nd5 Bd5 18.e4 Bb7 19.Qd3 Ba6 20.Qd2 Be2 21.Qe2 Nc6 22.Rd1 b5 23.e5 Nb6 24.f4 Nd5 25.Bd5 ed5 26.Qe4 de4 27.Re1 Qb6 28.Re4 Rd8 29.Kg2 Nd4 30.c3 bc3 31.Bc3 Ne6 32.Rb4 Qc6 33.Kf2 Qc3 34.Rb5 Rd2 35.Kf1 Qc1 0–1. cogit – mrgeorge, kurnik, 2011.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Nf6 7.b5 Be7 8.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Be7 8.Nf3).

4.b5 b6 5.c4 Bb7 6.Nc3 dc4 7.e3. BlackDemon (2650) – OBBYKA (1645), FICS rated standard game, 2013.

4.b5 Bc5?? 5.Bg7+- f6 6.e3 (better is 6.d4 Bd6 7.Bh8 Nh6+-) 6...Ne7 (6...Kf7 7.Bh8 Nh6 8.d4 Bb4 9.c3+-) 7.Bh8 Nf5 (7...Kf7 8.d4 Bd6 9.Ne5 fe5 10.Qh5 Kg8 11.Bf6+-) 8.c4 (8.g4 Nh6+-) 8...dc4 (8...Kf7 9.cd5 Qh8 10.Qc2+-) 9.Bc4 (9.Qc2 Bb4+-) 9...Qe7 (9...Ke7 10.Qc2 Qh8 11.Be6 Be6 12.Qc5 Nd6 13.Nd4+-) 10.Nc3 Qf8 11.Bf6 (better is 11.Ng1 Qh8 12.Qh5 Kf8+-) 11...Qf6 12.Ne4 Qe7 13.Nfg5 Bb6 (13...Ng7 14.Nh7 (< 14.Nc5 Qg5 15.d4 Qg2+-) 14...Nd7 15.Qf3+-) 14.Qh5 Kd8 15.Qh7 (15.Nf7!? Kd7+-) 15...Qh7 16.Nh7 c6 17.a4 cb5 (18.Bb5 Nc6+-) 0–1. galaxy5 – Dreamcatcher, Live Game Caissa's Web, 2004.

4.b5 f6 5.e3 Bd7 (5...e5 6.c4=) 6.Bd3 c6? (better is 6...Ne7=) 7.Ne5!+- fe5?? (better is 7...cb5 8.Qh5 Ke7+-) 8.Qh5 g6 (8...Ke7 9.Ba3 c5 10.Bc5 Kf6 11.Qf3 Kg5 12.h4 Kh6 13.g4 Be8 14.g5 Qg5 15.hg5 Kg5 16.Bf8 Bg6 17.Bg7 Bd3 18.Qh5) 9.Bg6! hg6 (9...Ke7 10.Qh4 Kd6 11.Be5 Kc5 12.Qd4 Kb5 13.Bd3) 10.Qg6 Ke7 11.Ba3 c5 12.Bc5 1–0. lucya (2145) – bankhead2k2, GameColony.com, 2002.

4.b5 Nf6 =.

(--> 1.b4 d5 2.Bb2 a6 3.Nf3 e6).

4.e3 Nf6 5.a3 c5 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.Nf3).

4.a3 Bb7 5.d4 (5.e3 Nf6=) 5...Be7 (5...Nf6 6.e3=) 6.Nc3 Nf6 7.Ne5 (7.e3 0-0=) 7...0-0 8.e3 Nfd7 (8...Nbd7 9.Bd3+=) 9.Ng4 (9.Bd3 c5=) 9...Nf6 (9...c5 10.bc5 bc5 11.f3+=) 10.Ne5 (10.Nf6 Bf6 11.Bd3 c5=) 10...Nbd7 11.Nf3 (11.Bd3 c5+=) 11...c5 12.dc5 (12.bc5 bc5 13.Be2 Rb8+=) 12...bc5 13.Bb5 (13.bc5 Rb8+=) 13...c4 (13...cb4!? 14.ab4 Bb4-/+) 14.Ng5 (14.0-0 a6 15.Bd7 Qd7+=) 14...a6 (14...Nb6 15.0-0 a6-+) 15.Nd5?? (better is 15.Bd7 Qd7 16.Nf3+=) 15...Bd5 (15...Nd5!? 16.Nh7 ab5 17.Nf8 Nf8 18.c3-+) 16.Bd7 Qd7 (better is 16...Nd7 17.Nf3-+) 17.Bf6 (17.e4 Bb7 18.e5-+) 17...Bf6 (17...gf6?! 18.Nh3-+) 18.Qh5 Threatening mate: Qxh7 18...Bc3 19.Ke2 (19.Kf1 h6 20.Rd1 Qa4-+) 19...h6 20.Rad1 (20.Nf3 Bf3 21.Kf3 Ba1 22.Ra1 Qd2-+) 20...hg5 (better is 20...Qa4 21.e4 Bc6 22.f3-+) 21.Qg5 (21.e4 Qa4 22.ed5 Qc2 23.Kf1-+) 21...Qa4 22.Rd4 (22.Rd5 Qc2 23.Kf3 ed5 24.Qd5-+) 22...Qc2 23.Kf1 Qc1 24.Ke2 Qh1 (better is 24...Qb2 25.Kf1 Bd4 26.ed4-+) 25.Rg4 Qe1 0–1. OObuc – cobra, playchess.de, 2001.

4.a3 Nf6 5.e3 =.

4.e3 c5 5.bc5 bc5 6.Bb5 (6.Be5 Nc6+=) 6...Bd7+= 7.a4 (7.Nc3 Nf6+=) 7...Nf6 8.0-0 Be7 (8...a6 9.Bd7 Nbd7 10.Bf6 Qf6 11.Nc3=) 9.c4 (9.Be5 a6 10.Bd7 Nbd7=) 9...0-0= 10.Ne5 (10.Nc3 a6 11.Bd7 Qd7 12.cd5 ed5=) 10...Bb5 (10...Qc7!?=) 11.ab5+= Nbd7 (11...Qc7!?+=) 12.Nc6+- Qe8 13.d3 Nb6 (13...Bd6 14.f4 e5 15.Re1+-) 14.Nd2+- dc4 (14...h6 15.Qc2 Qd7 16.Ra6+-) 15.dc4 Qd7 (15...a6 16.Ne7 Qe7 17.Bf6 Qf6 18.Ra6+-) 16.e4 Qc7 (16...Rfe8 17.Qe2+-) 17.e5 Ne8 18.Qe2 g6?! (18...a6 19.Qe4+- (19.Ra6?! Ra6 20.Ne7 Qe7 21.ba6 Qa7+-; 19.Ne7?! Qe7 20.Ne4 ab5 21.Ra8 Na8+-)) 19.Ne4 Ng7 (19...a6 20.Ne7 Qe7 21.Ra6 Ra6 22.ba6+-) 20.Ba3 a6 (20...Nf5 21.Ne7 Ne7 22.Bc5 Rfc8+-) 21.Ne7 Qe7 22.Bc5 Qb7 (22...Qc7 23.Nf6 Kh8 24.Bf8 Rf8 25.ba6+-) 23.Nf6 Kh8 24.ba6 Ra6 (24...Qc6 25.Bf8 Rf8 26.Rfb1+-) 25.Bf8 Qg2 (25...Ra1 26.Ra1 Nf5+-) 26.Kg2 (26.Kg2 Nc4 27.Ra6 Nh5 28.Nh5 Kg8 29.Bh6 Ne3 30.Qe3 f5 31.Qc5 gh5 32.Qf8) 1–0. DEFFM – GuestVDCT, freechess.org, 2018.

4.e3 c5 5.bc5+= Bc5?? 6.Bg7+- Ne7 7.Bh8 Nf5 8.Bb5 Bd7 9.Bd7 (9.Bd3!? Nh4 10.0-0 Nc6+-) 9...Nd7 10.Nc3 Ke7 (10...f6 11.e4 de4 12.Ne4 a6+-) 11.0-0 (better is 11.Be5+-) 11...Qh8 12.e4 (12.Rb1 Qf6+-) 12...de4 13.Ne4 Rg8 14.Nc5 Nc5 15.d4 Ne4 16.Re1 Nc3 (16...Qg7 17.g3 Qg4+-) 17.Qd3 Nd5 (17...Qg7 18.g3 Ng3 19.fg3 Rc8+-) 18.Ne5 (better is 18.Qf5! Qg7 19.Qh3+-) 18...Qg7? (18...Rg2 19.Kh1 Qa8 20.Qa3 Nb4 21.Qb4 Kf6 22.Nd7 Kg7+-) 19.Nc6?? (better is 19.g3+-) 19...Kd7 (better is 19...Kd6!? 20.Qf3 Kc6+=) 20.Na7?? (better is 20.Qe4 Kc6 21.c4 Qd4 22.cd5 Qd5 23.Rac1 Kb7 24.Rcd1 Qe4 25.Re4+/–) 20...Qg2 0–1. Nautiluschess – scaccomatte, ICS blitz, 2001.

4.e3 Nd7 5.Be2 Ngf6 6.a3 Bb7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.Be2 Nbd7).

4.e3 Nf6 5.b5 =.

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

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

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

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

(--> 1.b4 d5 2.Bb2 Nd7 3.Nf3 e6).

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

4.e3 Ngf6 5.a3 c5 6.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nbd7).

4.e3 Ngf6 5.b5 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

4.d4 Ng6 5.a3 Rg8 6.e3 Bd7 7.c4 c6 8.cd5 (8.c5 Qf6+/–) 8...cd5 9.Bd3 a5 10.0-0 (10.b5!?+=) 10...ab4= 11.ab4 Ra1 12.Ba1 Qb6 (12...Bb4 13.Bc3 Bd6 14.Qb3=) 13.Qb3 (13.b5!?+/–) 13...Qb4= 14.Qc2 Qb6 15.Nc3 Bd6 16.Rb1 Qc7 17.Nb5 Bb5 18.Bb5 Nc6 19.Rc1 (19.Bc3 Kd8=) 19...Nge7 (19...Ke7 20.Bc3+=) 20.e4 (20.Qh7 Qa5 21.Qd3 Qa3+=) 20...de4 21.Qe4 f5? (21...Qa5 22.Rb1=) 22.Qd3 (better is 22.Qe6!? Qd7 23.Qb3+-) 22...Kf7 23.Ne5?? (23.Bc4!?+=) 23...Be5?? (better is 23...Ne5 24.Qd1 N5c6 25.Qh5 g6 26.Qh7 Ke8-+) 24.de5+= Rd8 25.Qf3 Qb6 (25...Kg8 26.Qb3 Nd4 27.Rc7 Nb3 28.g3-+) 26.Bc6 (26.Qh5!? Ng6 27.Bc4=) 26...Nc6-/+ 27.g4 g6 28.gf5 Ne7?? (better is 28...ef5 29.Qh3 Kg8+=) 29.fg6 (29.fe6 Kg7 30.Qf6 Kg8 31.Qf7 Kh8 32.Qe7 h5+-) 29...Kg6 30.Qf6 Kh5 31.Qe7 Rg8 32.Kh1 Rg6 33.Qh7 Rh6 34.Qf7 Rg6 35.Qf3 (35.Rg1 Qc6 36.f3 Qc5 37.Qg6 Kh4 38.Qg4) 35...Kh6 36.Qf8 (36.Bd4! Qd8+-) 36...Kh5 37.Qf3 Kh6 38.Qf8 (better is 38.Bd4! Qd8 39.Be3 Kh7 40.Qh5 Kg7 41.Bh6 Kf7 42.Rg1 Qd5 43.f3+-) 38...Kh5= 39.Qf3 ½–½. M8IN3 – jeep2005, Live Game Caissa's Web, 2005.

4.e3 Nec6 5.b5 Na5 6.d3 Bd6 (better is 6...a6!?=) 7.Bg7+/– Rg8 8.Bh6?? (8.Be5 Be5 9.Ne5 Nd7+/–) 8...Be7?? (better is 8...Qf6 9.Nbd2 Qh6-+) 9.c3 Nd7 10.Qa4 b6 11.Nd4?? (better is 11.Bf4!?+/–) 11...Nc5 12.Qd1 Bg5 13.Bg5+/– Rg5 14.h4 Rg8 15.Qh5 Rh8 16.Nd2 Bb7 17.N2b3 Nab3 18.ab3 Qd7? 19.b4 e5 20.Qe5 (20.Qe5 Ne6 21.Qh8 Nf8 22.g3+-) 1–0. Schalkwijk,Peter – Smith,Harry, OP–2008–0-00558, 2008.

4.e3 Nf5 =.

4.e3 Ng6 5.Be2 Nd7 6.0-0 Nf6 7.a3 Be7 8.c4 0-0 9.cd5 Qd5 10.Nc3 Qd8 11.d4 c6 12.Bd3 b6 13.Qc2 Bb7 14.Rac1 c5 15.dc5 bc5 16.bc5 Qc8? (better is 16...Bf3!? 17.gf3 Bc5=) 17.Ne4+/– Ne4 18.Be4 Be4 19.Qe4 Rb8 20.Qd4?? (better is 20.Bd4+/–) 20...Bf6-+ 21.Qd6 (21.Qa4 Bb2 22.Rc2 Qc7-+) 21...Rb2 (21...Bb2 22.Rc2 Rd8 23.Qg3 Ba3 24.Rc3 Bc5 25.h3-+) 22.Nd4 Be7 23.Qa6 Qa6 0–1. Fournier,Frederic (2000) – ferconde2 (2000), Active (3/0), 2004.

4.Bg7+- Qh4 5.g3 Qe7 6.Bh8 Nh6 7.Be5 f6 8.Bb2 Nc6 (8...Nf5 9.Bc3+-) 9.e3 Qf7 10.Be2 Ne7 11.Bh5 Ng6 12.f5 (better is 12.e4!? de4 13.Nc3 Bc3 14.Bc3 Bd7+-) 12...Nf5 13.Nf3 (13.Nc3 e5+-) 13...Bd7 (13...Ne3 14.Qc1 Nc4 15.Bc3 Bc3 16.Nc3+- (16.dc3?! e5+-)) 14.a3 (14.0-0 0-0-0+-) 14...Bc5 (14...Ne3 15.Qc1 (15.ab4?! Nd1 16.Kd1 e5=) 15...Ba5 16.Bc3 Bc3 17.Nc3+- (17.dc3?! Nf5+-)) 15.Nc3 (15.Rf1 Bb5 16.g4 Bf1 17.gf5 Bh3 18.fg6 hg6+-) 15...0-0-0 16.g4 Nd6 17.0-0 Qg7 18.Na4 (18.Ne2 e5+-) 18...Bb6?? (better is 18...Ba4 19.Ng5! Qg8 20.Bf6 Rf8+/–) 19.Nb6+- cb6 20.a4 (20.Bg6 Qg6 21.Nh4 Qh6 22.Bf6 Rg8+-) 20...Ne7 21.g5 (21.a5 ba5 22.Ra5 Nc6+-) 21...fg5 (21...e5 22.Kh1 Bh3+-) 22.Bg7 (22...Nef5 23.Bd4+-) 1–0. eds – shooin, Live Game Caissa's Web, 2004.

4.Bg7+- Qh4 5.g3 Qh5 6.Bh8 Bc5 7.d4 Bb4 8.c3 Bd6 9.Be5 Nc6 10.Bd6 cd6 11.e3 Qd1 12.Kd1 e5 13.Kc1 Bf5 14.Bg2 ed4 15.cd4 Be4 16.Be4 de4 17.Nc3 d5 (17...Nf6 18.Kd2+-) 18.Nd5 0-0-0 19.Nc3 Nf6 20.h4 Rd6 21.g4 (21.Nh3 Na5+-) 21...Nb4 (21...Ng4 22.Ne4 Re6 23.Ng5 Re3 24.Kd2 Nd4 25.Nh7+-) 22.Nge2 Rc6 23.g5 Nd3 (23...Nfd5 24.Kd2 Nb6 25.Ng3+-) 24.Kd2 Nf2 25.gf6 Nh1 26.Rh1 Rb6 (26...Rf6 27.Rg1+-) 27.Ne4 Re6 28.N2c3 Kb8 (28...Rb6 29.Rg1 Rb2 30.Kd3+-) 29.Rg1 b6 30.Rg8 Kb7 31.d5 Re4 32.Ne4 a5 33.Kc1 a4 34.h5 a3 35.h6 b5 36.Rh8 b4 37.Rh7 Ka6 38.Rf7 b3 39.ab3 a2 40.Kb2 a1R (40...a1Q 41.Ka1 Kb6 42.h7 Kb5 43.Rb7 Ka5 44.h8Q Ka6 45.Qa8) 41.Ka1 Kb5 (41...Kb6 42.h7 Kb5 43.Rb7 Ka5 44.h8Q Ka6 45.Qa8) 42.Rb7 Ka5 43.b4 (43.f7 Ka6 44.Nc5 Ka5 45.b4) 43...Ka4+- 44.Nc5 (better is 44.f7 Kb3 45.h7 Kc2+-) 44...Ka3 45.Rb5 ½–½. Golem_01 – Mustang_11, computer chess game, 2001.

4.Bg7+- Qh4 5.g3 Qh5 6.Bh8 f6 7.Nf3 Nc6 8.Nc3 (8.a3 Be7 9.Nc3 d4+-) 8...Bd7 (8...Bc3 9.dc3 Nce7 10.e3+-) 9.g4! Qg6 (9...Qg4 10.Rg1 Decoy) 10.Rg1 0-0-0 11.g5 f5 (11...Bc3 12.dc3 fg5 13.Rg5+-) 12.Rb1 Bc3 (12...Nge7 13.Bf6 Bd6 14.e3+-) 13.Bc3 d4 14.Nd4 Nd4 15.Bd4 Bc6 (15...Qh5 16.e3 Qh2 17.Qf3+-) 16.e3 e5 (16...Ne7 17.Be2+-) 17.fe5 (17.Be5 Ne7+-) 17...f4 (17...Ne7 18.Bc4+-) 18.Qg4 Kb8 19.Bd3 Qf7 (19...Be4 20.Rb3+-) 20.e6 (20.Qf5 Qe8 21.Qf4 Qe7+-) 20...Qe7 21.Qf4 Qa3 (21...Bd5 22.Qe5 b6 23.c4+-) 22.Bh7 Ne7 23.c4 a6 (23...Nc8 24.h4+-) 24.Be5 (24.Qe5 Qa2 25.Qc5 Rd4 26.ed4 Nc8+-) 24...Rc8 (24...Qa5 25.Rb2 Kc8 26.g6+-) 25.Rb2 (25.Qd4 Ka8+-) 25...Qc5 (25...Ka8 26.h4+-) 26.g6 Nd5 27.cd5 Qc1 28.Kf2 (28.Kf2 Qg1 29.Kg1 Bd5 30.g7+-) 1–0. Adlai – Jahew, corr, 2018.

4.Bg7+- Qh4 5.g3 Qh5 6.Bh8 Qg6 7.Nf3 (7.Nc3 Nf6+-) 7...Nc6 8.Nc3 Nge7 (8...Bd7 9.Ne5 Ne5 10.Be5+-) 9.e3 (9.Nb5!? Kd8+-) 9...f6 10.g4! f5 (10...Qg4 11.Bf6 Deflection) 11.gf5 Qf5 (11...Nf5 12.Rg1 Qf7 13.Ng5+-) 12.Nb5 Bd6 (12...Ba5 13.Bd3 Qh3 14.Rg1+-) 13.Rg1 e5 (13...Ng6 14.Bd3 Qh5+-) 14.fe5 Bc5 15.Nc7 (15.Nc7 Kd8 16.Na8+-) 1–0. guesthapc – guestxyrf, internet free game, 2018.

5.c3 Bd6?? 7.Nf3+- Rg6 8.Bg5 f6 9.Bh4 Bf4 (9...Bd7 10.e3 Nc6+-) 10.Qa4 Nc6 11.Qf4 e5 12.Qe3 Be6 13.Na3 a6 14.Nc2 Qd7 15.Nb4 Nb4 16.cb4 d4 17.Qe4 Bd5 18.Qd3 (18.Qc2 Qc6 19.Qc6 Bc6+-) 18...Bf3 (18...e4 19.Qd4 ef3 20.Qe3 Be6 21.ef3 0-0-0+-) 19.Qf3 0-0-0 20.g3 Rf8 21.Bg2 c6 22.0-0 Qd6 23.Qh5 Rf7 (23...d3 24.Qh7 de2 25.Qg6 ef1Q 26.Rf1 Qd4 27.Kh1+-) 24.Qf5 (better is 24.Be4 d3 25.Bd3 e4 26.Qf5 Kc7 27.Qe4 f5+-) 24...Kc7 25.Bh3 Rfg7 (25...Kb8 26.Qe6 Qe6 27.Be6+-) 26.Qc8 (better is 26.Bf6 Rf6 27.Qf6 Re7+-) 26...Kb6 27.Qe6 Qb4 (27...Qe6 28.Be6 f5 29.Bf5 Rd6+-) 28.Rab1 (28.Rab1 Qb5 29.Rb5 ab5 30.Bf5+-) 1–0. TeaCzar – Mr.Oldenslo, ChessWorld.net, 2011.

5.c3 Rg8= 6.Qa4 Bd7 7.Qb4 Rg7 (7...Nc6 8.Qb2 Rg7 9.Nf3 Rg6 10.Na3 Nf5 11.Qb7 Rb8 12.Qa6 e5) 8.Qb7= (8.Nf3 Na6 9.Qb7 Nc5 10.Qb4 Ne4 11.d3 a5 12.Qa3 Nd6) 8...Nc6 9.Nf3 Rb8 10.Qa6 Rb6 11.Qd3 Qf6 12.Na3 Qf4.

5.c3 Rg8= 6.cb4 Rg7 7.g3 Na6 8.a3 c5 9.Nf3 cb4 10.ab4 Bd7 11.b5 Nc7 12.Nc3 Nb5.

5.c3 Rg8= 6.Nf3 Rg7 (6...Be7 7.Bh6 Bh4 8.g3 Rg3 9.Qa4 Bd7 10.Qd7 Qd7 11.hg3 Bg3 12.Kd1 Qa4) 7.cb4 Qf6 8.Nc3 Qf4 9.Nb5 Kd8 10.Qc2 Nc6 11.Qc3 Rg6 12.e3 Qf6.

5.c3 Qh4 7.g3 Rg3 8.Qa4 Bd7 9.Qb4 Rf3 10.Kd1 Rf1 11.Kc2 Qh6 12.Qb7 e5 +=.

5.Bh8 A) 5...Nc6 6.c3 (6.Bc3 Qd6 7.e3 d4 8.Bd4 Nd4 9.c3 Qc6 10.cd4 Nf5 11.Kf2 Bd7 12.Nf3 0-0-0) 6...Bc5 (6...Bd6 7.e3 Ke7 8.Bd4 Nf5 9.Nf3 Qg8 10.Be5 Be5 11.fe5 Qg7 12.Bd3 Ne5) 7.e3 Bd7 8.Qh5 Nf5 9.Nf3 Qe7 10.g4 0-0-0 11.Bd4 Nfd4 12.cd4 Bb4; B) 5...Nf5 B1) 6.Nf3 Nc6 7.c3 Be7 8.e3 f6 9.g4 Nd6 10.Qc2 Ne4 11.d3 Kf7 12.de4 Qh8; B2) 6.a3 Be7 (6...Ba5 7.Bc3 Bb6 8.e3 d4 9.ed4 Nd4 10.Nf3 Nbc6 11.Bd4 Nd4 12.Nc3 Bd7; 6...Bd6 7.Nf3 Bf4 8.e3 Bd6 9.Bd3 f6 10.g4 Nh6 11.Rg1 Nf7 12.Bg7 Qe7) 7.e3 Nc6 8.Qg4 Kd7 9.Bb2 Bh4 10.g3 Bf6 11.Nc3 Qh8 12.Qf3 Ke8; B3) 6.Bc3 Be7 (6...Bd6 7.Nf3 Bf4 8.e3 Bd6 9.Bd3 Nc6 10.0-0 Qe7 11.Bb2 a6 12.Nc3 Nh4; 6...Bc5 7.Nf3 d4 8.Bb2 Nc6 9.c3 Bd7 10.Qc2 Qe7 11.cd4 Ncd4 12.Nd4 Nd4) 7.e3 Nc6 8.Bd3 d4 9.ed4 Ncd4 10.Nf3 Qd5 11.Bd4 Nd4 12.Nc3 Nf3; B4) 6.c3+- Bc5 7.Nf3 Nc6 8.g4 Nh4 9.e3 Bd7 10.g5 Nf5 11.Nd4 Ncd4 12.cd4 Be7.

4.b5 Nb8 5.Nf3 Bd6?? (better 5...Nf6=) 6.Bg7+- Bf4 (6...Nh6 7.Bh8 (7.Bh6?! Qf6+=) 7...f6 8.g4+-) 7.Bh8 f6 (7...Ne7 8.e3 Bd6 9.Bd3+-) 8.e3 Bd6 9.Nh4 f5 (9...Qe7 10.c4+-) 10.Qh5 Kd7 11.Nc3 Be7 (11...Qe7 12.g4 Kd8 13.gf5+-) 12.Qh7 Kd6 13.Ng6 Bf6 14.Be2 e5 15.0-0 Be6 (15...a6 16.d4 ed4 17.ed4+-) 16.Bf6 Nf6 17.Qh4 e4 18.Bg4! fg4 (18...fg4 19.Rf6 Pinning (19.Rf6 Deflection); 18...Ng4 19.Qd8 Pinning (19.Qd8 Deflection)) 19.Rf6 Nd7 20.Qg3 Ne5 21.Qe5 (21.Qe5 Kc5 22.Qd4 Kd6 23.Qd5) 1-0. marekt (2035) – readbob, gameknot.com, 2014.

4.b5 Nce7 5.Nf3 Nf5 6.e3 Nf6 7.c4 dc4 8.Bc4 Be7 9.0-0 0-0 10.Re1 Nd6 11.Bf1 Bd7 12.a4 c5 (12...c6 13.Qb3=) 13.Nc3 b6 (13...Qa5 14.e4 c4 15.d4 cd3 16.Qd3+=) 14.Ba3 (14.Ne5 Qc7+=) 14...Nfe4 (14...Nd5!?=) 15.Ne4+/– Ne4 16.Bd3 Nf6 17.Bb2 h6 (17...Bc8 18.Qc2+=) 18.Ne5+/– Nd5 19.Qg4 Nf6 20.Qg3 Nh5 21.Qg4 (21.Qf3 Nf6+/–) 21...Nf6 22.Qh3 Nh7 (22...Qc7 23.Bc4+/– (23.Nd7?! Qd7 24.Bc4 Qd2=)) 23.Ng4 f5 24.Ne5 Bf6 25.g4 (better is 25.Bc4!?+-) 25...Be5+= 26.Be5 (< 26.fe5 Ng5 27.Qg2 fg4-/+) 26...Be8 (26...fg4 27.Qg4 Nf6 28.Qg3+/–) 27.gf5 Qd3 28.fe6?? (better is 28.Qg2 Bg6 29.fg6+/–) 28...Qg6 (better is 28...Bg6!?-+) 29.Qg3 Qg3 30.hg3 Nf6 31.f5? (31.Bd6 a6=+) 31...Bh5 (better is 31...Ng4 32.Bc3 Rf5-+) 32.e4 Rfd8 33.Ra2 Rd3 34.Re3 (34.a5 Re8-/+) 34...Rad8 (better is 34...Re3 35.de3 Ne4-+) 35.Rd3= Rd3 36.Kh2?? (36.Bb8 Ne4 37.Ba7 Nd2 38.Kh2 Nf3 39.Kg2-/+) 36...Ng4-+ 37.Kh3 Ne5 38.Kh4 (38.a5 Bg4 39.Kg2 Bf3 40.Kf2 Be4 41.ab6 Rf3 42.Kg1 Rg3 43.Kf2 Rf3 44.Kg1 ab6-+) 38...Be2 (39.a5 Nf3 40.Kg4 Rd2 41.ab6 ab6 (41...Ra2?! 42.b7=+) 42.Ra8 Kh7-+) 0–1. eds – shooin, Live Game Caissa's Web, 2004.

4.b5 Nce7 5.Nf3 Ng6 6.e3 Bd7 7.c4 c6 8.Nc3 Nf6 9.Bd3 cb5 10.Nb5 dc4 11.Bc4 Qb6 12.Rb1 Bb5 13.Bf6 gf6 14.Bb5 Ke7 15.f5! Ne5 (15...ef5 16.Bc4 Combination) 16.Ne5 fe5 17.0-0 Qc5 (better is 17...ef5 18.Rf5 Qe6+-) 18.fe6 fe6 19.Qf3 Bh6 (19...Kd6 20.Qb7 Qc7 21.Qa8 Bg7+-) 20.Qb7 Kd6 (20...Kd8 21.Qd7) 21.Qd7 1–0. b4_player – verry, casual, 2013.

4.e3 Qb4 5.Ba3 Qa5 6.Bf8 Kf8 7.Nf3 Ne7 8.Bd3 c5 9.Ne5 (9.0-0 c4 10.Be2 Nf5=+) 9...f6-/+ 10.Ng4 (10.Nf3 Kf7-/+) 10...Nbc6 11.0-0 c4 12.Be2 h5 13.Nf2 g6 (13...h4 14.Nc3=+) 14.e4 (14.Nc3 b5=+) 14...Kg7-/+ 15.d4 (15.a3 Qc5-/+) 15...de4 16.Ne4 Qd5 17.Nbc3 Qd4 18.Qd4 (18.Rf2 b5-+) 18...Nd4 19.Bc4 (19.Rf2 b5 20.Nd6 a6-+ (20...Nc2?! 21.Rc1-/+)) 19...Nc2 20.Nb5 (20.Rab1 Ne3 21.Nd6 Nf1 22.Kf1 Rd8-+) 20...Na1 (21.Ra1 e5-+) 0–1. Nilsson,Roland – Engberg,Peter, corr SSKK 2–776, 1993.

4.e3 Qb4 5.Ba3 Qb6 6.Bf8 Kf8 7.Nc3 Qd6 (7...Nf6 8.Nf3=) 8.Nf3 (8.Nb5 Qe7=) 8...f6 (8...a6 9.Bd3=) 9.Bd3 (9.Nb5 Qd7=) 9...Nc6 (9...a6 10.0-0=) 10.Nb5 Qd7 11.0-0 (11.Qc1 Nh6=) 11...a6 (11...Nge7 12.Qc1=) 12.Nc3 (12.Nbd4 Nge7=) 12...Nge7 13.Rb1 (13.a4 Nb4=) 13...Kf7 (13...Qd6 14.Qe1=+) 14.Qe1 (14.Nh4 g6=) 14...Rf8 (14...b5 15.e4=) 15.Qh4 (worse 15.Bh7 g6 16.e4 de4 17.Ne4 Kg7 18.Bg6 Ng6-+ (18...Kg6 19.Qg3 Kh7 20.Nfg5 fg5 21.Ng5 Kg7 22.Ne6 Kf7 23.f5=)) 15...Ng6? (better 15...h6=) 16.Qh7+- Nce7?? (16...Nge7 17.Nh4 Rg8 18.f5+-) 17.Qh5 (better 17.Ng5 fg5 18.Bg6 Ng6 19.fg5 Ke7 20.Qg6 Qe8 21.Qg7 Rf7+-) 17...Rh8 18.Bg6 Ng6 19.Ne5! fe5 20.fe5 Ke7?? (20...Kg8 21.Qg6 Rh6+-) 21.Qg5 (21.Qg5 Ke8 22.Qg6 Kd8 23.Rf7+-) 1–0. Charkiv – Zzda, internet corr, 2018.

4.Be5 Qb4 5.e3 Nc6 6.Bc7 d4 7.ed4 Qd4-+ (7...Nd4?! 8.Nc3=).

4.e3 Bc6 5.b5 Bd7 6.Nc3 Nf6 7.Nf3 Bc5 8.Bd3 0-0 9.0-0 c6 10.a4 Nh5 11.Ne5 f6?? (better 11...Qh4+=) 12.Qh5+- f5 13.Qh3 Be8 14.Ne2 Rf6 15.g4 Rh6 16.Qg2 fg4 (16...Bg6 17.gf5 ef5 18.Ng3+-) 17.Ng4 (worse 17.Qg4 Bh5 18.Nf7 Bg4 19.Nd8 Be7 20.Nb7 c5+-) 17...Rh5 (17...Rg6+-) 18.Nh6! Rh6 Decoy to h6 19.Qg7 A double attack… 1–0. Maestro – Trepion, internet, 2020.

4.e3 Nf6 (4...Bb4?? 5.Bg7 e5 6.Bh8 ef4 7.ef4 Qe7 8.Qe2+-) 5.a3 a6 (5...c5 6.bc5 Bc5 7.Nf3=) 6.Nf3= c5 7.c3 (7.bc5 Bc5 8.Be2 0-0=) 7...Nc6 (7...Qb6 8.Ne5=+) 8.Be2 Bd6 9.bc5 (9.0-0 c4=+) 9...Bc5 10.0-0 0-0 11.c4 (11.a4=) 11...b5 (11...d4!?=+) 12.d4 (12.cb5 ab5 13.Bb5 Qb6+=) 12...Ba7 (12...Bb6 13.cb5 ab5 14.Nc3=) 13.cb5+= ab5 14.Nc3 Rb8 (14...Ng4!? 15.Bc1 b4 16.ab4 Nb4+=) 15.Nb5+- Bb6 (15...Ne4 16.Ra2+-) 16.a4 Na5 (16...Ba5!?+-) 17.Ba3+- Nc4? (better 17...Re8+-) 18.Bc4 dc4 19.Bf8 Qf8 20.Ne5 Bb5 21.ab5 Bc7 22.Ra7 (better 22.Qf3 c3 23.Rfc1+-) 22...Be5 (22...Nd5 23.Nc4 Nc3+-) 23.fe5 (23.de5?! Rd8 24.Qc1 Nd5+-) 23...Nd5 24.Rff7 (worse 24.Raf7 Qe8+-) 24...Qf7 25.Rf7 Kf7 26.Qf1 Kg8 (26...Ke8 27.Qc4 Ne7 28.e4+-) 27.Qc4 Ne3 (27...Kf7+-) 28.Qe6 Kh8 29.Qd6 Rc8 30.b6 h6 (30...Nf5 31.Qd7 Rc1 32.Kf2 Rc2 33.Kf3 g6+-) 31.b7 Rc1 32.Kf2 Ng4 33.Kg3 (33.Kg3 Rc3 34.Kg4 h5 35.Kh5 g6 36.Kg6 Rg3 37.hg3 Kg8 38.b8Q) 1–0. Barcarola – tfmfc, internet free game, 2018.

4.Bg7+- e5 5.Bh8 Nf6 6.Bg2 +-.

4.Bg7+- f6 5.Bh8 e5 (5...Nh6 6.a3 Bd6 7.e3+-) 6.Bg2 (6.e4 h6+-) 6...Nc6 (6...Be6 7.e4 Ke7 8.a3+-) 7.e3 (better is 7.e4 Be6+-) 7...Bd7 (7...Bf5 8.c3 Bf8 9.Qb3+-) 8.Bd5 Qe7 (8...Ke7 9.c3 Bc5 10.d4+-) 9.Bg8 (better is 9.c3!? Bd6 10.Bg8 0-0-0 11.Bf6 Qf6 12.Bh7 Be7+-) 9...0-0-0 10.Bh7 (better is 10.Bf6!? Qf6 11.Bh7 e4+-) 10...Qh7 (10...Rh8 11.Be4+-) 11.Bf6 Rf8 12.Bh4 (better is 12.a3 Nd4 13.Ra2 Bd6+-) 12...Qf7 13.Qe2 Re8 14.Nh3 Nd4 15.Qd3 Nf3 16.Kd1 Bh3 17.Nc3?? Bg2 18.Rf1 Bf1?? 19.Qf1+= Bc3 20.dc3 Qd5 21.Kc1+/– Qd2 22.Kb2 Re6 Rb6 23.Rd1?? Rb6 24.Ka1 Qc3 0–1. Fourcart,Maxence – Ribeiro,Romain, FRA–chT U18 France, 1996.

4.Bg7+- Qg5 5.Bh8 f6 6.c4 (6.Nf3 Qg6+-) 6...Bd7 (6...Qe5 7.Nc3 Qc3 8.a3+-) 7.Bg2 (7.Nf3 Qf5 8.cd5 ed5+-) 7...Ne7 (7...Qe5 8.Nc3 Bc3 9.Nf3+- (< 9.dc3 Qc3 10.Kf1 Qc4+-)) 8.Qb3 (better is 8.Qc2!? Bc6+-) 8...Nbc6 9.a3 Bc5 (9...Ba5 10.h4 Qh6+-) 10.Qb7 (better is 10.Nf3 Qf5 11.cd5 (11.Qb7?! Rb8 12.Qb8 Nb8+-) 11...ed5 12.Qc3+- (12.Qb7?! Rb8 13.Qb8 Nb8+-)) 10...Rb8 11.Qc7 (11.Nf3 Qg6 12.Qb8 Nb8 13.d4+/–) 11...Rb2?? (better is 11...Qf5 12.Qb8 Nb8+/–) 12.cd5 Nd4?? 13.Be4+- ed5 14.Nf3 Nf3 15.Bf3 Bb6 16.Qd6 Bh3 17.Bf6 (17...Bc5 18.Qc5 Qf6 19.Nc3+-) 1–0. Harismuha – hansson, ChessWorld.net, 2004.

4.Bg7+- Qg5 5.Bh8 Nf6 6.Bf6 Qf6 7.c3 Bc5 8.e3 Bd7 9.Bg2 Nc6 10.d4 Bb6 11.Ne2 0-0-0 12.0-0 e5 13.a4 ed4 (13...Bf5 14.Nd2+-) 14.cd4 Nb4 (14...Na5 15.Bd5 Bh3 16.Bg2 Bg2 17.Kg2+-) 15.Nbc3 Ba5 16.Nd5 Nd5 17.Bd5 Bh3 18.Qb3 Bf1 19.Qb7 Kd7 20.Qb5 c6 21.Bc6 (better is 21.Qb7 Bc7 22.Rc1 Be2 23.Rc6 Qc6 24.Bc6 Kd6+-) 21...Ke7 (21...Qc6 22.Kf1 Bc7+-) 22.Kf1 Bc7 23.Qb4 (23.Qb7 Qd6 24.Be4 Kf8+-) 23...Bd6 24.Qb7 Kf8 25.Nf4 (25.Qa7!? Bg3 26.hg3 Qc6 27.Qc5 Qc5 28.dc5 Ra8+-) 25...Qh6 26.Bd5 Kg8 (26...Qf6 27.Rc1 Qe7 28.Nd3+-) 27.Qf7 Kh8 28.Ne6 Qh3 (28...Rg8+-) 29.Ke1 (better is 29.Kg1 Qh6 30.Nd8 Qg6+-) 29...Bb4 30.Ke2 Qg4 31.f3 Qg8 32.Qg8 (32.Qf6 Qg7 33.Qg7) 32...Rg8+- 33.Nf4 (better is 33.Rc1 h5+-) 33...Bc3 (33...Rc8 34.Ra2+-) 34.Rc1 Bb2 35.Rc7 Re8 36.Nh5 Bd4 37.Ra7 (better is 37.Be4 Be5 38.Rh7 Kg8 39.Ra7+-) 37...Re3 38.Kd2 Ba7 39.Be4 Ra3 40.Bc6 Ra2 41.Kd3 Rh2 42.g4 h6 43.Nf6 Kg7 44.Ne8 Kg6 45.Ke4 (better is 45.Be4!? Kf7 46.Nd6 Ke6 47.Nb7+/–) 45...Re2= 46.Kd5 Rd2 47.Kc4 (47.Ke6 Bb8+/–) 47...Rd4 (better is 47...Rc2 48.Kb5 Rc5 49.Ka6 Rc6 50.Ka7 Rc3=) 48.Kb5+/– Rf4 49.a5 h5 50.gh5 Kh5 51.Ka6 Rc4 (51...Bf2 52.Nc7+-) 52.Kb7 (52.Bd5!? Ra4 53.Ka7 Ra5 54.Kb6 Ra3+-) 52...Bd4 53.a6 Rb4 54.Kc8 Rb6 55.Bb7 Re6 56.Nc7 Bb6?? (56...Rh6+-) 57.Be4 (better is 57.Ne6 Kg6 58.Kb8+-) 57...Re7?? (better is 57...Bc7 58.a7 Ra6 59.Bg6 Kg6=) 58.Nd5+- Re8 (58...Ra7 59.Nb6 Ra6+-) 59.Kb7 Bd8 60.a7 Bg5 (60...Bh4 61.a8Q Ra8 62.Ka8+-) 61.a8Q (better is 61.f4!? Bh4 62.Bf5 Rd8+-) 61...Ra8 62.Ka8 Kh6 63.Kb8 (63...Kg7 64.f4+-) 1–0. audrey – janrav4, Live Game Caissa's Web, 2004.

4.Nf3 b5 5.e3 Be7 6.Bg7 Bf6 7.Bh8 Ba1 8.Ba1 Bd7 9.Be2 Nc6 10.a3 Qe7 11.0-0 0-0-0 12.Qc1 Nf6 13.Qb2 Ne4 14.d3 Ng5 15.Nbd2 h6 16.c4 dc4 17.dc4 bc4 18.Nc4 Nf3 19.Bf3 f6 20.Rd1 e5 21.a4 Qg7 22.b5 Bh3 23.g3 ab5 24.Bc6 bc4?? 25.Qb7 1–0. linakip – psif, kurnik, 2012.

4.Nf3 Nc6 5.a3 Nf6 6.e3 Bd6 7.Be2 0-0 8.0-0 (8.c4 dc4 9.Bc4 e5+=) 8...h6 (8...e5 9.d4 Qe7 10.de5 Ne5 11.Nbd2=) 9.d4= Ne4 (9...Qe8 10.c4=) 10.c4+= Re8 (10...Qf6 11.Nc3+=) 11.Nc3 (11.c5 Be7+=) 11...Nc3 12.Bc3 e5 (better is 12...dc4!? 13.Bc4 Qf6+=) 13.cd5+/– ed4 14.Bb2 Ne5 15.Nd4 (15.Bd4?! Nf3 16.Bf3 Qg5+=) 15...Bh3?? (better is 15...Ng6+/–) 16.gh3+- Qg5 17.Kh1 Ng6 (17...Qh4 18.Bg4 Ng4 19.Qg4 Qg4 20.hg4+-) 18.f4 Qh4 (18...Bf4 19.ef4 (worse is 19.Rf4 Re3 20.Rf3 Nh4+-) 19...Nf4 20.Rg1 Nh3 21.Rg5 Nf2 22.Kh2 Nd1 23.Rg7 Kg7 24.Rd1+-) 19.Rf3 c5 (19...Qe7+-) 20.Nf5 (20.Nf5 Qd8 21.Ng7+-) 1–0. pierre – koqqy, internet, 2009.

4.ba5 Ra5 5.e3 Ra8 6.Nf3 Nf6 7.Be2 Bd6 8.0-0 Qe7 9.h3 (9.Nc3 Bd7= (9...Ba3? 10.Nb5+-)) 9...e5+= 10.d3 0-0 11.Qc1 e4 12.de4 de4 13.Nd4 c5 14.Nb3 Nc6 15.N1d2 Ne5 16.Be5 Qe5 17.g3 (better is 17.f4!? ef3! 18.Nf3-/+) 17...Bh3-+ 18.Kh2? (18.Nc4 Qe6 19.Rd1 Be7-+) 18...Bd7 (better is 18...Bf1 19.Qf1 Rfd8 20.Nc4-+) 19.Kg2 (19.Nc4 Qe6 20.Nd6 Qd6-+) 19...Bg4 (19...Qe6 20.Rh1-+) 20.Qd1 (20.Bg4!? Ng4 21.Nc4-+) 20...Be2-+ 21.Qe2 Rad8 (21...Rfd8 22.Nc4 Qe7 23.Nd6 Qd6 24.Rfd1-+) 22.Qc4 (better is 22.Qb5-+) 22...Qd5?? (better is 22...Rd7-+) 23.Qd5= Nd5 24.Ne4 b6 25.Nd6 Rd6 26.Nd2 (26.c4 Nc3=) 26...Rfd8 (better is 26...Ne3!? 27.fe3 Rd2 28.Rf2 Rd6-/+) 27.Nf3 Nc3 28.a4 Ra8 29.Ra3 Na4 (29...Ne4!?=) 30.Rfa1+= b5 31.c4 Rad8 32.cb5 Nb6 33.Ra6 c4 (33...f6 34.Nd2 Rd2 35.Rb6+=) 34.Rc1 (34.Nd4 Nc8+/–) 34...h6? (34...Rc8 35.Ne5 f5 36.Nc6+-) 35.Nd4 (better is 35.Ne5 Rb8 36.Nc4 Nc4 37.Rc4+-) 35...Kf8?? (35...R8d7 36.Kf3+=) 36.Ra7 (better is 36.Nc6 Rd1 37.Rd1 Rd1 38.Rb6+-) 36...Rc8 37.Nc6 Nd5? (better is 37...Rcc6 38.bc6 Rc6+/–) 38.Rc4+- g6 (38...Re6 39.Kf3+-) 39.Ra6 (39.Rd4 Ke8+-) 39...Kg7? (39...Ne7 40.Nd4 Rc4 41.Rd6+-) 40.b6 (better is 40.e4 Nc7 41.Na7 Na6 42.Nc8+- (42.Rc8?! Nb4+-)) 40...Rdc6+/– 41.Rc6 Rc6 42.b7 Ra6 43.b8Q Ra5 (43...Re6 44.Qb2 Nf6 45.Qc3+/–) 44.Qb2 (44.Qe5 Kf8+-) 44...Kh7? (better is 44...Nf6+-) 45.Qb3 (better is 45.e4 Ne7 46.Qb6+-) 45...Rc5 (45...Rc5 46.e4 Nf4 47.gf4 Kg7+-) 0–1. Fournier,Frederic (1950) – Dinara (2550), Echecs21, 2003.

4.b5 Bd6?? 5.Bg7+- Be5 6.Be5 f6 7.Bb2 Qd6 (7...e5 8.e4! Be6 9.ed5 Qd5 10.Nc3+-) 8.e4! d4 (8...de4 9.Qh5 Combination) 9.Qh5 Ke7 10.Nf3 e5 11.a4 (11.Nh4!? f5+-) 11...Be6 (11...Kd8+-) 12.Ba3 1–0. Pereira – Sean613, internet, 2021.

4.b5 Nd7 5.Nf3 a4 (5...Ngf6 6.e3+=) 6.e3 c6 (6...Ngf6 7.d4=) 7.c4 (7.Be2 Ngf6=) 7...Nc5 (7...dc4 8.bc6 bc6 9.Nc3+=) 8.d4 (8.Nc3 Nf6+=) 8...Ne4 9.Bd3 (9.bc6 bc6 10.Nbd2+=) 9...Nef6 (9...cb5!? 10.cd5 Qa5 11.Nfd2 ed5 12.Be4 de4=) 10.0-0 (10.bc6 bc6 11.Nc3 Qa5+/–) 10...g6 (10...dc4!? 11.Bc4 cb5 12.Bb5 Bd7+/–) 11.Nc3 (11.bc6 bc6 12.Nc3 Qa5+-) 11...h5 (11...dc4 12.Bc4 cb5 13.Bb5 Bd7 14.Bd7 Nd7 15.Na4+/–) 12.Qc2 (12.bc6 bc6 13.cd5 cd5 14.Na4 Qa5+-) 12...h4 (12...dc4 13.Bc4 cb5 14.Bb5 Bd7 15.Ba4 Ba4 16.Na4+-) 13.bc6+- h3 14.cb7 (14.g3 bc6 15.Ne5 Ne7+-) 14...Bb7 15.cd5 (better is 15.c5 hg2 16.Bb5 Nd7 17.Rfb1+-) 15...Ba6?? (better is 15...hg2 16.Kg2 Nd5 17.Bb5 Ke7 18.Na4 Qd6+/–) 16.de6 (16.Qa4 Ke7 17.Ba6 Qd6+-) 16...fe6 (16...hg2 17.ef7 Kf7 18.Bg6 Kg7+-) 17.Qa4 Qd7 (17...Ke7 18.Ba6 hg2 19.Qb4 Qd6 20.Qb7 Nd7 21.Qa8 gf1R 22.Bf1+-) 18.Bb5 Bb5 (18...hg2 19.Bd7 Nd7 20.Rfb1+-) 19.Qa8 Qd8 20.Qd8 Kd8 21.Nb5 1–0. Wall,Bill – TerryM, internet, 2002.

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

5.Nf3 c6 6.e3 Nf6 7.Be2 Ra5 (7...Bd6 8.0-0=) 8.Nc3 Bd7 9.bc6 Bc6 10.0-0 Bd6 11.h3 (11.Nd4 0-0=) 11...Nbd7 (11...e5 12.Nb1 Qc7 13.d4=) 12.Na2 Qe7 13.Bc3 Ra8 14.Nb4 (14.Bb4 0-0=) 14...Nb6 (14...e5 15.Rb1=) 15.Nd4 (15.Rb1 Nc4 16.Nc6 bc6 17.Bc4 dc4=) 15...Bd7= 16.Nb5 0-0 (16...Bb8!?=) 17.Nd6+= Qd6 18.Bf6 gf6 19.d4 Kh8 20.Bd3 e5 21.Qh5 e4 22.Be2 f5 23.c4 (better is 23.Rfb1!?+=) 23...dc4+= 24.Rac1 Rac8 25.Rc3 Qg6 26.Rd1 Rfd8 27.Qh4 Be6 28.d5? (28.Qf4 f6+=) 28...Rg8?? (better is 28...Nd5 29.Nd5 Rd5 30.Rd5 Bd5-+) 29.g3= Bd7 30.Kh2 Qg7 (30...Kg7 31.Rd4=) 31.Rdc1 (31.Rd4 Qe5=) 31...Bb5 (31...Qe5 32.Qh5=) 32.Qe7 f6 (better is 32...Rge8 33.Qb7 Qf6=) 33.d6?? (33.Qe6 Qc7 34.Qf6 Rg7 35.Kg2+/– (35.Qf5?! Rf7 36.Qe4 Rf2 37.Kh1 Qg3 38.Qd4 Qg7 39.Qg7 Kg7=)) 33...Qe7-/+ 34.de7 Rge8 35.Rd1 Re7 36.Rd6 Nd7 37.Nd5 (37.Nc2 Ne5-/+) 37...Kg7?? (better is 37...Rf7-/+) 38.Ne7+- (38.Ne7 Rc5 39.Rd5 Rd5 40.Nd5+-) 1–0. purplepeace (2275) – hzsolt (2105), net–chess.com, 2004.

5.Nf3 Bd7 6.e3 Nf6 7.Be2 g6 (7...Be7 8.0-0=) 8.0-0+= Bg7 9.d4 Ne4 10.Nbd2 (10.Nc3 Nd6+=) 10...Nd6= 11.Rb1 (11.b6 cb6 12.c4 0-0=) 11...Nb5 (11...Bb5 12.Bb5 Nb5 13.c4 dc4 14.Nc4+=) 12.c4= dc4 13.Bc4 (13.Nc4 0-0=) 13...0-0 14.e4 (14.Bd3 Nd6+=) 14...Qe7+= Attacking the isolated pawn on a3 15.Re1 (15.Qc1 Rd8+=) 15...c5 (better is 15...Na3!? 16.Ba3 Qa3 17.Rb7 Bc6-/+) 16.Bb5= Bb5 17.d5 Be8 (17...Bd3 18.Bg7 Kg7 19.Rc1=) 18.Nc4 (18.Bg7!? Kg7 19.Rb6+=) 18...b5 19.Bg7 Kg7 20.Nce5 (20.Ne3 f6=) 20...b4 (better is 20...ed5!? 21.Qd5 Ra7+=) 21.d6 Qb7 (better is 21...Qa7+=) 22.Nc4 (better is 22.ab4!? cb4 23.Qd4+=) 22...Bb5 23.Ne3 (23.Qc2 Qa6 24.Nfd2 Nc6+=) 23...Bc6-/+ 24.e5 (24.Nd2!?-/+) 24...Bf3-+ 25.Qf3 (25.gf3 Nd7 26.f4 f6-+) 25...Qf3 26.gf3 b3 (26...Nd7 27.f4 Rab8 28.Kf1-+) 27.Rec1 Nd7 28.Nc4 (28.f4 f6-+) 28...f6 (28...g5 29.Kf1-+) 29.f4 fe5 30.fe5 Rf5 31.Re1 Raf8 32.Re2 Rg5 33.Kf1 (33.Kh1 Rf4 34.Rc1 Kf7-+) 33...Rf4 34.Rc1 Rfg4 35.Ree1 Ne5! 36.Ne3 (36.Ne5 Rg1 Double attack (36...Rg1 Decoy); 36.Re5 Rg1 Double attack (36...b2 Passed pawn)) 36...Rg1 37.Ke2 Re1 38.Re1 Rh5 39.Rc1 (39.Rh1 Kf8-+) 39...Rh2 40.Rc5 (40.Nd1 Nd7 41.Rc4 Rh5-+) 40...Rf2! 41.Kf2 Nd3 42.Ke2 (42.Ke2 Nc5 43.Nc4-+). inspector (2330) – bonaparte (2155), net–chess.com, 2008.

6.Nc3 Nf6 7.f4 (7.Qf3 Bd6 8.Be2 0-0 9.Nh3 c6 10.0-0 e5+=) 7...c5 (7...Bc5 8.Nf3 0-0 9.Bd3 c6 10.0-0 Ra5=; 7...c6 8.Nf3 Bc5 9.Bd3 0-0 10.0-0 Ra5=; 7...Be7 8.Be2 0-0 9.Nf3 Qe8 10.0-0 Ne4=; 7...Bd6 8.Qf3 0-0 9.Qg3 Re8 10.Nf3 c5=) 8.Nf3 Qb6 9.Ne5 c4 10.Nd7 Nbd7 =.

6.Bd4 Ra5 7.Nc3 (7.Bc3 Ra8 (7...Ra7 8.Nf3 Nf6 9.Be5 Bd6 10.d4 Be5=) 8.Nf3 Nf6 9.Bd3 c6 10.bc6 Nc6=) 7...Nf6 (7...c5 8.Be5 f6 9.Bb8 Qb8 10.Nge2 Qd6+=; 7...Nh6 8.Be5 f6 9.Bg3 Nf5 10.Bd3 Ng3=) 8.Nf3 Bd6 (8...Be7 9.Be2 0-0 10.0-0 c5=) 9.Be2 (9.Be5 0-0 10.Bd6 cd6=) 9...Qe7 10.Be5 Ng4 (better is 10...Ne4!?+=) 11.Bg7+= Rg8 12.Bd4 e5? (better is 12...Nf6 13.Bf6 Qf6+=) 13.Nd5+- Qe6 14.Bc4 (14.Bc3!? Rb5 15.Bb5 Bb5+-) 14...Qg6 15.Bc3 (better is 15.Nh4 Qh5 16.Bc3 Bb5 17.Qg4 Qg4 18.Nf6 Kf8 19.Ng4 Rg4 20.Ba5 Bc4 21.Nf5 Rg2 22.Nd6 cd6 23.Bc7+-) 15...Ra8? (15...Nf2 16.Qe2 Nh1 17.Ba5 c6 18.bc6 bc6 19.Nc7 Ke7+=) 16.Rg1+- c6 17.bc6 Bc6 (17...Nc6 18.h3 Nf6 19.Bd3+-) 18.Nb6 Ra6 (18...Ra7 19.h3 Nf2 20.Kf2+-) 19.Ba6 Na6 20.h3 (better is 20.Nc4 e4+-) 20...Nf6? (20...Nf2 21.Kf2 e4+-) 21.Ne5 Be5 22.Be5 Bg2 1–0. orane – Tatomas, internet, 2008.

6.Bd4 c5 7.Be5 c4 (7...f6 8.Bb8 Rb8 9.c4 Bd6 10.cd5 Be5=; 7...Ne7 8.c4 Ng6 9.Bg3 Be7 10.Nc3 dc4=) 8.Nc3 f6 9.Bg3 Qa5 10.Nge2 Bb5 =.

6.Bd4 c6 A) 7.Nc3 f6 (7...Nf6 8.Nf3 Bd6 9.Be5 Be5 10.Ne5 0-0=; 7...cb5 8.Bb5 Nc6 9.Nf3 Nd4 10.Bd7 Qd7=) 8.Bd3 g6 9.bc6 bc6 10.Nb1 Bd6+=; B) 7.Nf3 Ne7 (7...Nh6 8.Ne5 Nf5 9.Qf3 Qe7 10.Bc3 cb5=; 7...c5 8.Be5 f6 9.Bb8 Qb8 10.c4 Qa7=; 7...cb5 8.Ne5 Nf6 9.Nd7 Nbd7 10.Bb5 Be7=; 7...Nf6 8.Nc3 Be7 9.Be2 0-0 10.0-0 Ne4=) 8.Nc3 Nf5 9.Be5 f6 10.Bb8 Qb8=.

6.Bd4 Nf6 A) 7.c4 Bd6 (7...dc4 8.Bc4 Be7 9.Nc3 c6 10.Nf3 0-0=; 7...c6 8.Nc3 dc4 9.Bc4 Be7 10.Nf3 0-0=; 7...c5 8.Be5 Ne4 9.Nc3 Nc3 10.dc3 f6+=) 8.Nf3 Qe7 9.Be5 0-0 10.d4 dc4=; B) 7.Be2 c6 (7...Bd6 8.Nf3 0-0 9.Be5 Be5 10.Ne5 Ra5=) 8.Nc3 Ne4 9.Nf3 c5 10.Be5 f6+=; C) 7.Nf3 Bd6 8.c4 c5 9.Bf6 Qf6 10.Nc3 dc4=.

6.Bd4 Nh6 A) 7.Nf3 Nf5 (7...f6 8.Bb2 e5 9.d4 e4 10.Nfd2 Bg4=) 8.Bb2 Bd6 9.Bd3 0-0 10.0-0 Nh4=; B) 7.Qf3 c6 (7...Nf5 8.Be5 f6 9.Bb2 c6 10.Bd3 Bd6=; 7...f6 8.e4 c6 9.e5 Nf5 10.Bb2 Be7=) 8.Bd3 cb5 9.Ne2 b4 10.e4 de4+=; C) 7.Bb2 Nf5 8.Nf3 Bd6 9.c4 0-0 10.Nc3 dc4=.

6.Be2 A) 6...c6 A1) 7.bc6 Bc6 (7...Nc6 8.Nf3 Nf6 9.0-0 Bd6 10.Nc3 e5=) 8.Nf3 Nf6 9.Nc3 Bd6 10.Nb5 Bb5=; A2) 7.Nc3 Qb6 (7...Qg5 8.g3 Qe7 9.f4 c5 10.Nf3 Nf6=) 8.Rb1 c5 9.Nf3 Nf6 10.Na2 Be7=; B) 6...c5 7.c4 Nf6 (7...dc4 8.Bc4 Nf6 9.Nc3 Qa5 10.Nf3 Be7+=; 7...Qa5 8.Bc3 Qd8 9.Nf3 Nf6 10.0-0 Be7+=; 7...Qb6 8.Be5 dc4 9.Nc3 Ne7 10.Bc4 Ng6+=) 8.Nf3 dc4 9.Nc3 Nd5 10.Bc4 Nb6+=; C) 6...f6 C1) 7.Nc3 Bd6 8.Bd3 g6 9.Nf3 Ne7 10.e4 c5+=; C2) 7.Bd3 Nh6 (7...f5 8.c4 Nf6 9.Nc3 c6 10.Nf3 Be7+=; 7...g6 8.c4 dc4 9.Bc4 c6 10.Nc3 cb5=; 7...Qe7 8.Nf3 e5 9.e4 c6 10.ed5 cd5=) 8.Qh5 Nf7 9.Nc3 g6 10.Qh4 c6=; C3) 7.d4 Ne7 (7...c6 8.bc6 Nc6 9.c4 dc4 10.Bc4 Rc8+=; 7...c5 8.c4 cd4 9.ed4 dc4 10.Bc4 Bd6+=; 7...Ra5 8.Bc3 Ra7 9.Bb4 Bb4 10.ab4 c6+=; 7...Nh6 8.c4 dc4 9.Bc4 c6 10.Nc3 Ra5+=; 7...Bd6 8.c4 dc4 9.Bc4 c6 10.Nc3 Nh6+=) 8.c4 dc4 9.Bc4 c6 10.Nc3 cb5+=; C4) 7.Nf3 Bd6 8.c4 Ne7 9.Nc3 c6 10.0-0 0-0+=; C5) 7.c4 Ra5 (7...dc4 8.Bc4 Bd6 9.Nc3 c6 10.Ne4 Bf8+=; 7...Bd6 8.Nc3 dc4 9.Bc4 c6 10.Ne4 Bf8+=) 8.Nc3 dc4 9.Bc4 c6 10.bc6 Bc6+=; C6) 7.Bh5 g6 8.Be2 c6 9.Nc3 Qb6 10.Rb1 cb5+=; D) 6...Nf6 7.Nf3 c6 (7...Be7 8.0-0 0-0 9.Ne5 c6 10.Nc3 c5=; 7...Bd6 8.0-0 0-0 9.Be5 Be5 10.Ne5 Ra5=) 8.bc6 Nc6 9.0-0 Bd6 10.Nc3 e5=.

6.Qf3 A) 6...Ra5 A1) 7.Nc3 Nh6 (7...c5 8.bc6 Nc6 9.Rb1 Nf6 10.Qg3 e5=; 7...c6 8.bc6 Nc6 9.Rb1 Nf6 10.Qg3 e5=; 7...Ne7 8.Rb1 Ng6 9.Qh5 Bd6 10.Nf3 Qe7=) 8.Be2 Nf5 9.Nh3 Nd6 10.Qg4 Nb5+=; A2) 7.Bc3 Ra8 (7...Ra7 8.Be2 c6 9.Qg3 Ne7 10.Be5 Nf5=) 8.Be2 c6 9.bc6 Bc6 10.Bd4 Nh6=; A3) 7.Be5 Ne7 8.Nh3 Ng6 9.Bc3 Ra8 10.e4 de4=; A4) 7.Nh3 c6 (7...Ne7 8.Ng5 Nf5 9.Qh5 Qe7 10.Bc3 Ra8+=; 7...Nf6 8.Bc3 Ra8 9.Be5 Ne4 10.Bd3 f6=; 7...Nh6 8.Bc3 Ra8 9.Bd3 c5 10.bc6 Nc6=; 7...c5 8.Bc3 Ra8 9.Be5 f6 10.Bg3 Ne7+=; 7...Ra8 8.Nc3 Nf6 9.Be2 Bd6 10.0-0 c6=; 7...h6 8.Bc3 Ra8 9.Be5 Nf6 10.Be2 Bc8+=) 8.Bc3 Ra8 9.bc6 Nc6 10.Ra2 Nf6=; B) 6...Nf6 B1) 7.Be5 c6 (7...Ne4 8.d3 Nd6 9.c4 Qg5 10.Bf4 Qf6=; 7...Bc8 8.Bf6 Qf6 9.Qf6 gf6 10.d4 c5=) 8.Nc3 Be7 9.Qg3 0-0 10.Bc7 Qe8=; B2) 7.Bf6 Qf6 (7...gf6 8.d4 Ra5 9.Nc3 c6 10.bc6 Nc6=) 8.Qf6 gf6 9.Nf3 e5 10.c4 dc4=; B3) 7.Be2 Bd6 (7...c6 8.Bf6 Qf6 9.Qf6 gf6 10.Nc3 Rg8=) 8.Nc3 c6 9.bc6 bc6 10.Nd1 e5+=; B4) 7.Nh3 Be7 (7...Bd6 8.c4 c6 9.Bf6 gf6 10.bc6 Bc6=; 7...c6 8.bc6 Nc6 9.Bf6 Qf6 10.Qf6 gf6=; 7...c5 8.Be5 Bc8 9.Bf6 Qf6 10.Qf6 gf6=) 8.Nc3 0-0 9.Be2 c6 10.bc6 Nc6=; B5) 7.Nc3 Bd6 (7...c5 8.bc6 Nc6 9.Rb1 Ra5 10.Qg3 e5=) 8.Be2 c6 9.bc6 bc6 10.Nb1 e5+=; B6) 7.c4 Be7 (7...c6 8.Bf6 gf6 9.bc6 Bc6 10.cd5 Bd5=) 8.Nc3 c6 9.bc6 Bc6 10.cd5 ed5=; C) 6...Ne7 C1) 7.Be2 Nf5 (7...Ng6 8.Nh3 c6 9.e4 Qc7 10.ed5 cd5=; 7...Ra5 8.Bc3 Ra8 9.Ra2 c5 10.Rb2 Nf5=; 7...c6 8.Nc3 e5 9.Rb1 Ra5 10.Qh5 Nf5=; 7...Nc8 8.Nc3 Nd6 9.Qf4 Ra5 10.Nf3 Bb5=) 8.Nc3 Ra5 9.Nh3 Nd6 10.0-0 Nb5+=; C2) 7.Bd3 c6 (7...c5 8.c4 dc4 9.Bc4 Qb6 10.Nc3 Nf5=) 8.Nh3 Ng6 9.e4 Qc7 10.Qh5 Qd6=; C3) 7.e4 c5 (7...Ra5 8.ed5 ed5 9.Nc3 c6 10.Nge2 Nf5=; 7...c6 8.ed5 cd5 9.Bd3 Ng6 10.Qg3 Ne7+=) 8.ed5 ed5 9.Nc3 Be6 10.0-0-0 d4=; C4) 7.c4 c6 8.Nc3 dc4 9.Bc4 Nf5 10.Be2 cb5=; C5) 7.Nh3 Nf5 (7...Ng6 8.e4 c6 9.Bd3 Qc7 10.Qh5 Qd6=) 8.Nc3 Bd6 9.Bd3 Nh4 10.Qg4 Ng6=; C6) 7.Nc3 Ng6 8.Qh5 Qh4 9.Qd1 Bd6 10.Nf3 Qe7=; D) 6...c6 D1) 7.c4 dc4 8.Bc4 cb5 9.Be2 Bc6 10.Qg3 Ne7+=; D2) 7.Nc3 Nh6 (7...Ne7 8.Rb1 e5 9.bc6 Nbc6 10.Bb5 Bf5=; 7...Ra5 8.bc6 Nc6 9.Rb1 Nf6 10.Qg3 e5=; 7...Nf6 8.Qg3 Ra5 9.bc6 Nc6 10.Nf3 Ne4=; 7...Be7 8.Nd5 cd5 9.Bg7 Bf6 10.Bh8 Bh8=; 7...e5 8.Qg3 f6 9.f4 ef4 10.Qf4 Nh6=) 8.Be2 e5 9.bc6 bc6 10.Qg3 Qf6=; D3) 7.bc6 Bc6 (7...Nc6 8.Nc3 Nf6 9.Rb1 Ra5 10.Qg3 e5=) 8.Qg3 Nf6 9.Nc3 Qb6 10.Rb1 Ne4=.

6.Nf3 Nf6 A) 7.Be2 c6 (7...Be7 8.0-0 0-0 9.Ne5 c6 10.Nc3 c5=; 7...Bd6 8.0-0 0-0 9.Be5 Be5 10.Ne5 Ra5=) 8.bc6 Nc6 9.0-0 Bd6 10.Nc3 e5=; B) 7.Bd3 c6 (7...Bd6 8.0-0 c6 9.Be5 Be5 10.Ne5 0-0=) 8.bc6 Nc6 9.Bb5 Bd6 10.Nc3 Ne7=; C) 7.c4 Bd6 (7...dc4 8.Bc4 Ne4 9.Ne5 Nd6 10.Qh5 Qe7=; 7...c6 8.Nc3 dc4 9.Bc4 Bd6 10.0-0 0-0=; 7...Be7 8.Nc3 dc4 9.Bc4 c6 10.bc6 Nc6+=; 7...Ra5 8.Bc3 Ra8 9.Be5 dc4 10.Bc4 Ne4+=) 8.Nc3 dc4 9.Bc4 c6 10.e4 Bf4=.

5.Nf3 b6 6.e3 Bb7 7.a4 Nf6 8.d4 Be7 9.dc5 Bc5 10.Bd3 0-0 11.0-0 h6 12.Nbd2 Nbd7 13.Nb3 Bd6 14.c4 dc4 15.Bc4 Bh2?? (better 15...Qe7=) 16.Nh2+- Qc7 (16...Rc8 17.Qe2+-) 17.Rc1 Nc5 (17...Qd8 18.Ng4+-) 18.Nc5 bc5 19.Qc2 (19.Bf6 gf6 20.Qh5 Kg7+-) 19...e5 20.Qc3 (20.f4 Be4 21.Qe2 Qb7+-) 20...Rfe8 21.Nf3 Bf3 22.gf3 Qc8 23.Kg2 Qf5 Black prepares e4 24.Rg1 e4 (24...Qh5 25.Bd3+-) 25.f4 (better 25.Kf1 Kf8 26.fe4 Ne4 27.Qg7 Ke7 28.Qe5 Qe5 29.Be5+-) 25...Qg4 (25...Red8 26.Kf1 Kf8+-) 26.Kf1 Qh3 27.Ke1 Qh2 (27...Re6 28.Be6 Qe6 29.Qf6 Qf6 30.Bf6 g6 31.Rc5 Kh7+-) 28.Rg7! Kf8 (28...Kg7 29.Qf6 Mate attack) 29.Rf7 Kg8 30.Rg7! Kf8 (30...Kg7 31.Qf6 Mate attack) 31.Qf6 1-0. black_bishop_88 (2430) - GohanSantos (2375), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 a5)

5.Nf3 b6 6.e3 Nf6 7.Be2 a4 8.0-0 Be7 9.d3 0-0 10.Nbd2 Bb7 11.c4 dc4 12.Nc4 Nd5 13.Qc2 Nd7 14.Rab1 N7f6 15.Rfd1 Qc7? (better is 15...Nd7+=) 16.Be5+- Qd8 17.e4 Nc7 18.Nb6 Ra5 19.Nc4 Rb5?? (19...Ra8+-) 20.Bc7 Rb1 (20...Qc7 21.Rb5 Bc6 22.Rbb1+-) 21.Bd8 (21.Qb1?! Qc7 22.Qb6 Qb6 23.Nb6 Ba6=) 21...Rd1 22.Qd1 Rd8 23.Qa4 h5 (23...Ra8 24.Qb5 Ba6+-) 24.Qa7 Rd7 (24...Be4 25.Qe7 Re8 26.Qc5+-) 25.Nfe5 Rc7 26.Qb8 Rc8 27.Qb7 Re8 28.a4 h4 29.a5 h3 30.a6 hg2 31.a7 1–0. kamret (2185) – xcecp07 (1965), GameColony.com, 2003.

5.a4 d5 6.e3 Bd6 7.c4 0-0 8.Nf3 Bd7 9.Qc2 h6 10.c5 Be7 11.d4 Ne4 12.Nc3 f5 13.Ne5 Be8 14.Be2 Nd7 15.bc6 Ne5 16.cb7 Rb8 17.de5 Nc5 18.0-0 Rb7 19.Nb5 Qb8 20.Bd4 Na6 21.f4 Nb4 22.Qc3 Bd7 23.Rfc1 Rc8 24.Qd2 Rf8 25.Bc5 Bc5 26.Rc5 Rc8 27.Rac1 Rc5 28.Rc5 Nc6 29.Qc3 Rb6 30.h4 Qd8 31.g3 g5 32.hg5 hg5 33.Qe1 Qe7 34.Nd6 gf4 35.ef4 Rb2 36.Rb5 Ra2 37.Rb7 Qh7? 38.Ne8+/– Qh3?? 39.Nf6+- Kh8 40.Rd7 Ra1?? 41.Rh7 Qh7 42.Qa1 Qa7 43.Kg2 Qe3 44.Qh1 Kg7 45.Qh7 Kf8 46.Qh8 Kf7 47.Bh5 Ke7 48.Qe8 1–0. Garcia Roman,J (2000) – Diaz Begonte,M (1820), XIII Open, Malaga ESP, 2010.

5.bc6 Nc6 6.e3 Nf6 7.Nf3 Bd6 8.d4 0-0 9.Bd3 Ne4 10.0-0 f5 11.Nbd2 Qc7 12.c4 Rf6 13.cd5 ed5 14.Rc1 Qf7 15.Ne5 Be5 16.de5 Rg6 17.g3 (17.f3 Ng5+=) 17...Qe7 18.Nf3 Be6 19.Kh1 h5 (better is 19...Rc8!?=) 20.Nh4+/– Rg4 21.h3?? (better is 21.f3!? Rg3 22.Nf5 (22.fe4 Qh4 23.Rf4 Rg4 24.ef5 Rf4 25.ef4 Bf7+/–) 22...Bf5 23.Be4 de4 24.hg3+/–) 21...Rh4 (better is 21...Rg3!? 22.fg3 Ng3 23.Kg1 Qh4-/+) 22.gh4 Qh4 23.Qf3 (23.Kg1 Qh3 24.Rc2 Ng5=) 23...f4 (23...Nd2 24.Qg3 Qg3 25.fg3 Nf1 26.Rf1 g6+=) 24.ef4?? (better is 24.Be4 de4 25.Qf4 (worse is 25.Qe4 Qh3 26.Kg1 f3 27.Qg6 Bg4 28.Qg7 Kg7 29.e6 Kg6 30.Rc6 Qg2) 25...Qh3 26.Kg1+=) 24...Bh3-/+ 25.Kg1 Bg4 26.Qg2 Bh3 27.Qh2?? Bf1?? 28.Qh4+- Bd3 (28...Bd3 29.Qh5 Bc4+-). Fournier,Frederic – Age_of_empires, Partie evaluee, 2m + 0s, 2008.

5.e3 Qb6 6.a4 cb5 7.Bb5 Bd7 8.Na3 Nf6 9.Nf3 Ba3 10.Ba3 (10.Ra3 Bb5 11.Bf6 Ba4 12.Bg7 Rg8+=) 10...Bb5= 11.ab5 (11.Rb1!?=) 11...Qb5=+ 12.Qe2 (12.d3 Qd7=+) 12...Qe2-/+ 13.Ke2 Nc6 (13...b6!?-/+) 14.Rhb1=+ Rb8 (14...Nd8!?=+) 15.Bd6= Rd8 16.Bc7 Rd7 17.Ba5 0-0 18.Bc3 Ne4 19.Bd4 Nd4 20.Nd4 e5 21.Nf3 (21.Nb5 f6+=) 21...f6= 22.Ra5 Rc8 23.c3 Nc5 24.Rab5 Rdc7 25.Ne1 e4 26.Nc2 Nd3? (better 26...Kf7!?=) 27.Rd5+/- Ra8 28.Nb4 Ne5 29.Rd4 Ra2?? (29...f5!?+/-) 30.Nd5 (better 30.Na2 f5 31.Rdb4+-) 30...Rc5? (30...Rc4+-) 31.Rb7 h5 (31...Ng6 32.Nb4 Ra8 33.Rdd7+-) 32.Ne7 (32.Nf6 gf6 33.Rd8) 32...Kh7 33.Nf5 (better 33.Re4 Nc4 34.Rd4+-) 33...Nc4 (33...Kg6 34.Nh4 Kh7 35.Re4 Rc3+-) 34.Rg7 Kh8 35.Rd8 1-0. black_bishop_88 (2540) - BoJet (2660), lichess.org, 2020. (=1.a3 d5 2.b4 e6 3.Bb2 a5)

5.e3 Bd7 6.b6 (better is 6.Nc3!?=) 6...Qb6-/+ 7.Bd4 c5 8.Be5 Nc6 9.Bf4 Nf6 (9...e5 10.Bg3-/+) 10.Nc3 Ne7 (10...d4!? 11.Rb1 Qd8-/+) 11.Rb1= Qd8 12.Bb5 (12.Rb7 Ng6 13.Bc7 Qc8+=) 12...d4 (12...Ng6 13.Bg5-/+) 13.Bd7+= Qd7 14.Nb5 Ned5 15.Nc7?? (better is 15.Be5 de3 16.de3-/+) 15...Nc7-+ 16.Rb7 Nfd5 17.Bg3 (17.Bc7 Nc7 18.Qf3 Rd8-+) 17...Bd6 18.f4 (18.Bd6 Qd6 19.Nf3 de3 20.de3 Qa6-+) 18...Qc8 (better is 18...de3 19.Ne2-+) 19.Rb1 0-0 20.e4 Nb6 (better is 20...Nf4 21.Nf3 e5 (worse is 21...Ng2 22.Kf2 Nf4 23.e5-+) 22.Bf4 ef4-+) 21.Rb6+= Be7 (21...Qd7 22.Nf3+=) 22.Nf3= Na6 23.Ne5 Rb8 (23...c4 24.Bf2=) 24.Rc6 Qb7 25.c3? (25.0-0=) 25...Qb1?? (better is 25...dc3 26.d3 Rfd8-+) 26.Ra6 (26.0-0 Qb5 27.c4+=) 26...Qe4 (better is 26...Qd1 27.Kd1 Rb1 28.Ke2 Rh1 29.Ra5 dc3 30.dc3 Rg1=) 27.Kf2+/– Rbd8 (27...dc3 28.Qe2 (28.Ra5? c2 29.Qe2 Qd4 30.Qe3 Rb1-+) 28...Qd4 29.Qe3+=) 28.Nc6 Rd7? (28...dc3 29.Ne7 Kh8+=) 29.Re1 Qd3 30.Ra5 dc3 31.dc3 Bf6 (31...Qd1 32.Ne7 Kh8 33.Rd1 Rd1 34.Rc5 Ra1+-) 32.Qd3 Rd3 33.c4 (33.Re3 Rd7+-) 33...Rc3?! (33...Bc3 34.Ra4 (worse is 34.Rc5 Be1 35.Ke1 Ra3+-) 34...Be1 35.Ke1+-) 34.Ra4 Rc2 (34...Rc8 35.Ne5+-) 35.Kf1 Bc3 (35...Rc8 36.Ne5+-) 36.Ne7 (36.Rd1 Re8+-) 36...Kh8 37.Re2 Rc1 38.Kf2 Bd4 39.Kf3 Rc3 40.Kg4 Re8 (40...f5 41.Kh5 g6 42.Ng6 hg6 43.Kg6 Rf6 44.Kh5+-) 41.Nc6 Bf6 42.Bf2 Rc8 (42...g6 43.Re3 Rc2 44.Kf3+-) 43.Ne5 (43.Na7 g6 44.g3 Ra8 45.Bc5 Kg7+-) 43...h5 (43...Kg8 44.Re3 Rc2 45.Kf3+-) 44.Kh5 Rc7 45.Ng6! fg6 46.Kg6 Bd4 (46...Rc8 47.Bc5 Rc1+-) 47.Ra8 Rc8 48.Rc8 1–0. rhometal (2000) – rimazu (2050), net–chess.com, 2016.

5.ab4 Ra1 6.Ba1 b5 (6...Nf6 7.Nf3+=) 7.e4 (7.e3 c6=) 7...c6 (7...de4 8.Bb5 Bd7 9.Be2+=) 8.ed5 (8.e5 Nh6=) 8...ed5+= 9.Bb2 (9.Qe2 Qe7=) 9...Bf5 (better is 9...Nf6+=) 10.g4? (10.Nf3 Bd6+=) 10...Bg6?? (10...Qe7 11.Ne2 Qe4 12.Na3 Qh1 13.gf5 Qh2 14.d3-+) 11.h4?? (11.Qe2!? Ne7 12.d3=) 11...h5?? (11...Qe7 12.Ne2 Qe4 13.h5 Qh1 14.hg6 hg6 15.Nd4-+) 12.g5? (12.d3 Qe7 13.Kd2 hg4 14.Qg4 Nd7+=) 12...Bd6?? (better is 12...Qe7 13.Be2 Qe4-+) 13.Bg2 (13.Na3 Ne7+=) 13...Ne7 (13...Qe7 14.Ne2-/+) 14.d4 (14.d3!?+=) 14...0-0-/+ 15.Nd2 Re8 (15...Nf5 16.Bf3 Re8 17.Kf1-/+) 16.Qf3 (16.Bf3 Nf5 17.Kf1 Bf4-/+) 16...Nf5 (16...Bc2 17.Ne2-/+) 17.Kd1 (17.Ne2!?-/+) 17...Qe7 The mate threat is Qe1 18.Qe2 (better is 18.Ne2-+) 18...Bf4?? (better is 18...Qd7 19.Qf3 Qa7-+) 19.Qe7+= Re7 20.Ne2 Bd2 (20...Bd6 21.Bc1+=) 21.Kd2= Nd7 22.Bc1 (22.Nf4 Nb6 23.Kd1 Nc4=) 22...Nd6+= 23.Nf4 Be4 (23...Bf5 24.Kd1+= (24.Nh5? Nc4 25.Kd1 Bg4 26.f3 Bh5-+)) 24.f3= Nc4 25.Kd1 (25.Ke2 Bf5 26.Kf2 g6=) 25...Bf5 (better is 25...Bb1=) 26.Re1?? (better is 26.Nh5 Re3 27.Ng3 Rd3 28.Ke2+=) 26...Bc2!-/+ 27.Kc2 A deflection 27...Re1 28.Bd2 (28.Bh3 Ndb6-+) 28...Ne3 (28...Ne3 29.Be3 Re3-/+; better is 28...Rg1-+) 0–1. carrafurca (2100) – pushtiu (2270), net–chess.com, 2006.

5.cb4 Nf6 6.Nf3 Bd6 7.h3 0-0 8.e3 Bd7 9.Bd3 Nc6 10.0-0 Re8 11.Qc2 h6 (11...e5 12.Be2+=) 12.Nc3 e5 13.Bf5? (13.e4 Nd4 14.Nd4 ed4 15.Nd5 Nd5 16.ed5 Qg5+=) 13...Ne7?? (better is 13...Bf5 14.Qf5 e4-+) 14.Bd7+= Qd7 15.Rac1 c6 16.Na4 Ng6 (better is 16...Ra7+=) 17.Nb6+/– Qe7 18.Na8 Ra8 19.Ne1 e4 20.f4 Nf8 21.Bf6 (21.d3 N8d7+=) 21...Qf6+= 22.d3 (22.Qb3 Nd7+/–) 22...Ra3 23.de4 Re3? (23...Qe7 24.b5 de4 25.bc6 bc6 26.Qe2+=) 24.ed5?? (better is 24.e5 Be5 25.fe5 Qe5 26.Qf2+-) 24...cd5= 25.f5 (25.Qd2 Bf4 26.Nd3 Qd4 27.Rf4 Qd3+/–) 25...Bb4+= 26.Nd3 Qd4 27.Nf2 b6 28.Rcd1 (better is 28.Rfd1 Qf4 29.Rb1=) 28...Qf6?? (better is 28...Qc4!? 29.Qc4 dc4+=) 29.Rd5 (29.Ng4 Qc3 30.Ne3 Qe3 31.Kh1 Qe5+-) 29...Bc5 (29...Rc3 30.Qe2 Bc5 31.Kh1+/–) 30.Kh1 (30.Rc5 bc5 31.Ng4 Qd4 32.Ne3 Qe3 33.Qf2 Qe7+/–) 30...Qh4 (30...Qe7 31.Qb1+=) 31.Rd3 (31.Ng4 Re1 32.Rd1 Rf1 33.Rf1 Nh7+/–) 31...Re8+= 32.Ng4 Nh7 (32...h5 33.Nf2+=) 33.Qd2 (33.Qa4 Qe7+/–) 33...h5+= 34.Nh2 Nf6 (34...Qg5 35.Nf3 Qd2 36.Nd2+=) 35.Rd8 Rd8 (35...Qa4 36.Re8 Qe8 37.Re1+/–) 36.Qd8+/– Kh7 37.Nf3 Qc4?? (better is 37...Qf4 38.h4 Kh6+/–) 38.Ng5 Kh6 39.Nf7 (39.Qh8 Nh7 40.Qh7 Kg5 41.Qg7 Kh4 42.Qf6 Kg3 43.Rf3) 39...Qf7-+ 40.Qh8 (40.Qd2 Kh7 41.Qe2 Qd5-+) 40...Nh7 0–1. pushtiu (2315) – gtan (2290), net–chess.com, 2007.

5.Qa4 Bd7 6.b5 -/+.

5.d4 b6 6.Nf3 Ba6 7.Nbd2 ab4 8.ab4 Nbd7 9.Ne5 Qc8 10.e3 (10.Nd7 Nd7 11.e4 Bf1 12.Rf1 Ra1 13.Ba1 Bd6+=) 10...Bf1+= 11.Ra8 Qa8 12.Nf1 Bd6 13.Nd2 (13.Nd7!? Nd7 14.Nd2+=) 13...Be5 14.de5 Ne5 15.0-0 Qc6 16.f4 Nc4 17.Nc4 Qc4 18.Qa4 Ke7 19.f5 ef5 20.Rf5 Qd3 21.Re5?? (21.Rf1 Qe3 22.Kh1-+) 21...Kd6 22.c4 (22.Qa1 Ke5 23.c4 Ke4 24.cd5 Qe3 25.Kh1 Kd5 26.Qd1 Ke6 27.h3-+) 22...Qb1 23.Kf2 Qb2 24.Kf3 Qe5 25.c5 bc5 26.b5 0–1. sureet_sk – calbag, ChessWorld.net, 2013.

6.Ba1 Bb4?? 7.c3 (better is 7.Bg7 Nf6 8.Bh8+-) 7...Bc5 (7...Bd6 8.e3-/+) 8.d4 Bb6 (8...Bd6 9.e3-/+) 9.e3 (9.c4 Nf6-/+) 9...Nf6-/+ 10.Bd3 (10.c4 Ne4-/+) 10...Qd6 (10...c5 11.dc5 Bc5 12.c4-/+) 11.0-0 c5 12.Bb2 (12.dc5 Bc5 13.c4 dc4 14.Qa4 Nbd7 15.Qc4 b6+=) 12...cd4 (12...0-0!?+=) 13.cd4 Nc6 14.Ba3 Qc7 (14...Qd7 15.Ne5 Qc7 16.Nc6 bc6 17.Qc1=) 15.Qa4 (15.Nc3 Na7 16.Qb3 Qd8+=) 15...Bd7 (15...Ne4 16.Rc1=) 16.Bb5 (16.Nc3 Na7 17.Qb3 Ba5=) 16...Ne4 (16...Na7 17.Bd7 Qd7 18.Qb3+=) 17.Ne5 (17.Rc1!?=) 17...Ne5-/+ 18.de5 Nc5?? (better is 18...Bb5 19.Qb5 Qc6-/+) 19.Bc5+/– Bc5 20.Rc1 (better is 20.Qa8!? Qd8 21.Qb7+/–) 20...b6= 21.Nd2 (better is 21.Nc3!?=) 21...Bb5-/+ 22.Qb5 Qd7 23.Qd7 (23.Qd3!?-/+) 23...Kd7-+ 24.Kf1 Ra8 25.Ke2 (25.Rc2 f6 26.Nf3 Rc8-+) 25...Ra2 26.Kd3? (better is 26.Rb1-+) 26...Bb4 Threatening mate: Rxd2 27.Rc2 (27.Nf3 Rf2 28.Rc2 Rc2 29.Kc2 h6-+) 27...Rc2 28.Kc2 Bd2 29.Kd2 b5 (29...Kc6 30.h4-+) 30.Kc3 Kc6 31.Kb3 (31.g4 Kc5-+) 31...Kc5 32.Kc3 (32.h4 h5-+) 32...b4 33.Kb3 Kb5 (33...f5 34.ef6 gf6 35.g4-+) 34.Kc2 (34.h4 h5-+) 34...Kc4 35.Kb2 (35.g3 b3 36.Kb2 f5 37.ef6 gf6-+) 35...b3 (better is 35...Kd3 36.g4-+) 36.Kc1 (36.g4-+) 36...Kc3 (36...Kd3 37.Kb2 Ke2 38.Kb3 Kf2 39.h4-+) 37.Kb1 b2 (37...b2 38.h3 Kd2 39.Kb2 Ke2-+) 0–1. alaamattar (2180) – dfrosa (2120), net–chess.com, 2006.

6.Ba1 Bb4?? 7.Bg7 f6 8.c3 (8.Bh8 Nh6 9.c3 Bf8 10.Qa4 c6+-) 8...Bd6 (8...Bf8 9.Bh8 Nh6 10.Qa4 c6 11.Qc2+-) 9.Bh8 Qe7 10.c4! dc4 (10...h5 11.Qc2 Qf8 12.Qg6 Qf7 13.Qc2+-) 11.Nc3 (11.Qa4 Nd7 12.Qc4 Nf8+-) 11...h6 (11...Nd7 12.Qb1+-) 12.Qc2 Qf7 (12...Bd7 13.Qb1 Bb4 14.Qe4 Bc3 15.dc3+-) 13.e3 c6 (13...Ne7 14.Ne4 (worse 14.Bc4 Qg8+-) 14...Nd7 15.Nd4+-) 14.Bc4 b5 (14...Nd7 15.Nd4 Nb6 16.Bb3+-) 15.Bb5! cb5 (15...Bc7 16.Bc4+-) 16.Nb5 Qd7 (16...Bc7 17.Nc7 Kd8 18.Nb5+-) 17.Nd6 Qd6 18.Qc8 Kf7 19.Qc2 Nd7 (19...Kf8+-) 20.Qh7 Ke8 21.Qg8 (21.Qg8 Qf8 22.Qe6 Qe7 23.Qc6+-) 1–0. Pierre – GuestRwpdx, internet, 2020.

6.Ba1 Bb4?? 7.Bg7 Nh6 8.Bh8 (worse 8.Bh6 Qf6 9.Bg5 Qf5+-) 8...f6 9.c3+-.

6.Ba1 Nf6 7.c3 Bd6+=.

4.a4 Bb4?? 5.Bg7 Nf6 6.Bh8 +-.

4.a4 b6 5.b5 Bb7 6.e3 a5 7.Nf3 Bd6?? (better is 7...Nf6=) 8.Bg7+- f6 (8...Kd7 9.Bh8 Nf6 10.Bf6 Qf6 11.d4+-) 9.Bh8 Qe7 10.Nh4 Nd7 11.Qh5 Qf7 12.Qf7 (better is 12.Be2+-) 12...Kf7 13.Be2 Nh6 14.Bh5 Kg8 15.Bf6! Nf6 16.f4 (better is 16.Be2+-) 16...Nh5+= 17.g4 Ng7 (worse is 17...Ng4 18.Rg1 Nhf6 19.h3+/–) 18.g5 (18.h3 c6=) 18...Nhf5 19.Nf5 ef5 20.d4 Re8 21.Ke2?? (21.Kf2 Ne6=) 21...Bb4?? (better is 21...Bf4 22.Ra3 Bg5-+) 22.Nd2 (better is 22.Rc1!?=) 22...Bc3-/+ 23.Rag1? (better is 23.Nf3 Ba1 24.Ra1+=) 23...Re6?? (better is 23...Bd4!? 24.Rg3 Nh5-+) 24.h4 (24.Nf3 c6+=) 24...Nh5 (24...Bd4 25.Rh3-/+) 25.Nf3 (25.Kd3 Bb4+=) 25...c6 (better is 25...Nf4 26.Kf2 Nh5-/+) 26.Ne5 White prepares g6 26...Bd4? (better is 26...cb5 27.ab5 Nf4 28.ef4 Bd4+=) 27.ed4+- c5 (27...cb5 28.ab5 Nf4 29.Kf3+-) 28.Kd3 (better is 28.Kf3 cd4 29.Rc1+-) 28...c4?? (better is 28...Nf4!? 29.Kd2 cd4+/–)29.Kc3 (better is 29.Ke3 Re7+-) 29...Nf4 30.g6?? (better is 30.Re1+-) 30...Ne2+= 31.Kd2 Ng1 32.Rg1 hg6 33.Ng6 Kf7? (33...Re4 34.Ne7 Kh7 35.Nf5 Bc8+/–) 34.Ne5+- Ke7?? (better is 34...Kf8 35.Rf1 Rh6 36.Rf5 Ke8+-) 35.Rg7 Kf6 (35...Ke8 36.Rb7 f4 37.h5+-) 36.Rb7 (36.Rf7) 36...f4 (36...Rd6 37.Rb6! Rb6 38.Nd7 Kg6 39.Nb6+-) 37.h5 (37.Rf7) 37...f3 (37...Kg5 38.Rf7+-) 38.Ke1 (better is 38.h6 Kf5 39.Rf7 Kg5+-) 38...Re8 (38...Kf5 39.c3+-) 39.h6 (39.Rb6 Kf5+-) 39...Rh8 (39...Kf5 40.Kf2 Re6 41.Rf7 Kg5 42.h7+-) 40.Rf7 (better is 40.Rb6 Kf5+-) 40...Ke6 (40...Kg5 41.Rd7 Kf5 42.h7+-) 41.h7 Kd6 (41...f2 42.Kf1 c3 43.Kf2+-) 42.Rg7 (better is 42.Ng6 Rh7 43.Rh7 Ke6+-) 42...Ke6 43.Rg8 (better is 43.Rg6 Kf5 44.Rh6+-) 43...Rh7 44.Re8 Kd6 45.Kf2 Rh2 46.Kf3 Rc2 47.Rd8 Kc7 (47...Ke6 48.Ng6 Rc3 49.Kg4+-) 48.Rd7 (worse is 48.Rd5 Rc1 49.Rd7 Kc8+-) 48...Kc8 49.Kf4 (better is 49.Rd5!? c3+-) 49...c3 50.Kf5?? (better is 50.Rd5 Rf2 51.Ke3+-) 50...Rf2+= 51.Ke6 Re2?? (51...c2 52.Nd3 Rd2 53.Nc1 Rd4 54.Kd6=) 52.Ke7 (better is 52.Rd6 c2 53.Rc6 Kd8 54.Kd5+-) 52...Re5 (52...c2!? 53.Rd8 Kc7 54.Rd7 Kc8 55.Rd8 Kc7 56.Rd7 Kc8=) 53.de5+/– c2 54.Rd8 (54.Rd6!? c1Q 55.Rc6 Qc6 56.bc6-/+) 54...Kc7= 55.Rd6 c1Q 56.Rc6 (better is 56.Rd7!? Kc8 57.Rd8 Kb7 58.Rd7 Kb8 59.Rd8 Ka7 60.Rd7 Ka8 61.Rd8 Kb7 62.Rd7 Kc8 63.Rd8 Kc7 64.Rd7 Kc8=) 56...Qc6-/+ 57.bc6 Kc6?? (better is 57...d4 58.e6 d3-/+) 58.Kf6 d4 59.e6 d3 60.e7 Kd7 61.Kf7 d2 (61...Kc6 62.e8Q Kd5 63.Qe6 Kc5 64.Qb3+-) 62.e8Q Kd6 63.Qd8 Kc5 64.Qd2 b5 65.ab5 (65.Qa5 Kd4 66.Qb4 Kd3 67.ab5 Ke3 68.b6 Kd3 69.b7 Ke2 70.b8Q Kf3 71.Q8f4 Kg2 72.Qbd2 Kh3 73.Qdh2) 65...Kb5 66.Qb2 Ka6 (66...Kc4+-) 67.Ke7 1–0. guest348 – guest426, ICC, 1999.

4.a4 Nf6 5.b5 =+.

4.d4 b6 5.Nf3 h6 6.Nc3 Nd7 7.g3 Bb7 8.Bg2 Ngf6 9.0-0 g6 10.h3 Bg7 11.e3 0-0 12.Qe2 b5 13.Rae1 c6 14.Bc1 a5 15.Bd2 ab4 16.ab4 g5 (better is 16...Ne4!?-/+) 17.e4= de4 18.Ne5 (18.Ne4 Ne4 19.Qe4 Qc7=) 18...Ne5+= 19.de5 Nd5 (better is 19...Nd7+=) 20.Nd5?? (better is 20.Ne4 Qc7 21.Nd6+=) 20...ed5 (20...Qd5?! 21.Bc3 c5 22.Rd1= (worse is 22.Qb5 Ba6 23.Qc5 Bf1 24.Bf1 Rfc8-+); 20...cd5?! 21.f4-+) 21.f3 ef3 (21...Be5!? 22.fe4 Bg3 23.ed5 Be1 24.Re1 cd5 25.Qb5-+) 22.Rf3 Qe7 23.Re3 Rfe8 24.e6 (better is 24.Bc3-/+) 24...f6?? (24...Bd4 25.Bc3 Be3 26.Qe3 Qe6 27.Qd4 Qe1 28.Be1 Re1 29.Kf2-+) 25.c4? (better is 25.Qd3=) 25...dc4 (25...bc4 26.Bc3-+) 26.Be4 (26.Bc3 f5-+) 26...Rad8 (better is 26...Ra2!? 27.Qf2 c5 (27...Qe6 28.Bh7 Kf7 29.Re6 Re6 30.Qb6 Re1 31.Be1+-) 28.Bb7 Qb7-+) 27.Bc3 Qc7 (better is 27...Rd6!?-/+) 28.Bg6= Re7 29.Bf7 Kf8 (29...Rf7?? 30.ef7 Qf7 31.Re7+-) 30.Kf1 (30.Qc2!? Rd3 31.Rd3 cd3 32.Qd3+=) 30...Bc8 31.Bh5 Rd6 (31...Rd3 32.Bg4 Qd6 33.Bf5 Re3 34.Qe3-/+) 32.Bg4 c5 (32...Kg8 33.Qf3 Qd8 34.Bf6 Bf6 35.Qf6-/+) 33.bc5 (better is 33.Qf2 Kg8 34.Bf6 Bf6 35.Qf6+/–) 33...Ba6?? (33...Qc5 34.Qb2 Kg8 35.Bb4+=) 34.h4 (better is 34.cd6 Qd6 35.Rd1 Qc7+-) 34...Qd8?? (better is 34...Qc5 35.Qf2 f5=) 35.cd6+- Qd6 36.Bf6 (better is 36.Rd1 Qc7 37.Rd7+-) 36...Bf6 37.Rd1?? (37.Rf3 Kg7 38.Bh5+-) 37...Qc7?? (37...Qc6 38.Qf2 Kg7+-) 38.Qf2 Kg7 39.h5 Bc8 (39...Qc6 40.Qf5 Qe8+-) 40.Qf5 Qc6 41.Qg6 Kh8 42.Qh6 (42.Rd8 Re8 43.Re8 Qe8 44.Qe8 Kg7 45.Qf7 Kh8 46.Qf8 Kh7 47.Bf5) 42...Kg8 43.Rd8 Re8 44.Qf6 (44.Qg6 Kh8 45.Qf6 Kg8 46.Qg6 Kh8 47.Re8 Qe8 48.Qe8 Kg7 49.Qf7 Kh8 50.h6 Be6 51.Qg7) 44...Be6 (44...Qh1 45.Ke2 Qg2 46.Kd1 Qf1 47.Qf1 Rd8 48.Ke2 Rf8 49.Qf8 Kf8 50.e7 Kg8 51.e8Q Kg7 52.Qg6 Kh8 53.Re8) 45.Re6 (45.Be6 Qe6 46.Qe6 Kf8 47.Re8 Kg7 48.Qg6) 45...Rd8 (45...Qh1 46.Ke2 Qg2 47.Kd1 Qf1 48.Qf1 Rd8 49.Ke2 Rd2 50.Kd2 c3 51.Kc1 b4 52.Rg6 Kh8 53.Qf7 b3 54.Rh6) 46.Qd8 Kf7 (46...Qe8 47.Qe8 Kg7 48.Bf5 c3 49.h6) 47.Rc6 (47.Re7 Kf6 48.Qf8) 47...Kg7 48.Qf6 (48.Rc7 Kh6 49.Qf6) 48...Kg8 49.Be6 1–0. nimzou (1720) – beammeupscotty (2175), net–chess.com, 2014. (=1.a3 d5 2.b4 e6 3.Bb2 a6)

4.e3 b6 5.Nf3 Nd7 6.c4 c6 7.Be2 dc4 8.Bc4 b5 9.Bb3 h6 10.0-0 Bb7 11.d3 Ngf6 12.Nbd2 g6 (better is 12...c5!?=) 13.Ne4+/– Qe7 14.Nf6 Nf6 15.Rc1 Bg7 16.Nd4 0-0 17.Nc6 Bc6 18.Rc6 Rfd8 19.Be5 Qd7 20.Rc7 (20.Qf3 A) 20...Qd3? 21.Bf6 Bf6 22.Be6 (22.Qf6?! Qb3 23.Ra6 Qd3+/–) 22...fe6 23.Qf6+-; B) 20...Ne4 21.Bg7 Qd3+-) 20...Qe8 (20...Qd3!? 21.Qf3 Qf5 22.Qf5 A) 22...ef5?? 23.Rf7 (23.Bf7?! Kh8+-) 23...Rd3 24.Bf6 (24.Rf6?! Rb3 25.Rg6 Ra7+-) 24...Bf6 25.Be6+- (25.Rf6?! Rb3 26.Rg6 Kh7+-); B) 22...gf5 23.Bf6 Bf6=) 21.d4 Rdc8 22.Qc2 Rc7 23.Qc7 (23.Bc7 Rc8 24.Rc1 Qd7-/+) 23...Rc8 24.Qb7 Rc6 25.a4 ½–½. ramoschessbrasil (2505) – beammeupscotty (2100), net–chess.com, 2011.

4.e3 c5 5.bc5 Nf6 6.d4 Nc6 7.Nf3 Qc7 8.Nbd2 Be7 9.Bd3 h6 10.Rb1 0-0 11.c4 Ng4 (11...Rd8 12.0-0+/-) 12.Qc2 f5 (12...Rb8 13.0-0+-) 13.cd5 ed5 14.h3 Nf6 15.Bf5 Bf5 16.Qf5 Ne4?? (16...Rae8+-) 17.Qd5 Kh8 18.Ne4 Rad8 (18...Kh7 19.Qe6 Nd8 20.Qe5+-) 19.Qh5 Na5 (19...Bf6 20.Nf6 gf6 21.Qh6 Kg8 22.Qg6 Qg7 23.Qg7 Kg7 24.Nh4+-) 20.d5 Nc4 (20...Kg8 21.Qg6 Bc5 22.Nc5 Rd5+-) 21.Qh6 Kg8 22.Qg7 1-0. Oldenev – Gerry, internet, 2021.

4.Nf3 b5 5.e3 (better is 5.a4 ba4 6.c4=) 5...c5? (better is 5...Nc6=) 6.bc5+- Bc5?? (better is 6...Nf6 7.d4 Nc6+-) 7.Bg7 Qb6 (7...Nf6 8.Bh8 Nc6 9.Nc3+-) 8.Bh8 Bb7 (8...Nd7 9.Ne5+-) 9.Nc3 (9.Ne5 Nc6+-) 9...Nc6 (9...Nd7 10.Bd4+-) 10.Bd3 0-0-0 (10...Be7 11.0-0+-) 11.Ng5 d4 (11...Qc7 12.Qh5+-) 12.Nce4 de3 (12...Nh6 13.Bf6 Be7 14.0-0 Bf6 15.Nf6+-) 13.fe3 Be7 (13...Nh6 14.Bf6 Rd5 15.Qh5+-) 14.Nf7 Rf8 (14...Nh6 15.Nd8 Qd8 16.Bc3+-) 15.Qh5 Nf6 16.Bf6 Bf6 17.Nf6 Ne5 18.Qe5 Rf7 19.0-0 Rg7 20.Nd5 Bd5 21.Qg7 Qc6 22.Rf8 1–0. pierre – tiebu, internet, 2010.

4.Nf3 c5 5.bc5 Nf6 6.e3 (6.d4 b6+=) 6...Nc6 (6...Bc5 7.Be2=) 7.Nc3 (better 7.d4!?+=) 7...Bc5=+ 8.d4 Be7 9.Bd3 0-0 10.0-0 Bd6 (10...b5 11.e4=) 11.Rb1 e5 (11...Qa5 12.e4 Be7 13.Qe1=) 12.de5 Ne5 13.e4 (13.Nd5 Nf3 14.Qf3 Nd5 15.Qe4 Bh2 16.Kh2+/-) 13...Nf3-/+ (13...Nd3?! 14.Qd3 de4 15.Ne4 Ne4 16.Qe4=) 14.Qf3 d4 (14...Bg4!? 15.Qe3 d4-+) 15.e5 (15.Nd5 Ng4 16.g3= (worse 16.Bd4 Nh2 17.Qe3 Nf1 18.Bf1 Re8-/+)) 15...Be5-/+ (worse 15...dc3 16.Bc3 Ng4 17.ed6 Qd6 18.Qh3+/-) 16.Ne4 Re8 17.h3 Ne4 18.Be4 Qf6 19.Bb7 (19.Qd3!?=+) 19...Bb7-/+ 20.Qb7 Rab8 21.Qd5 Rb5 22.Qf3?? (22.Qc4 Rd8 23.Ba1=+) 22...Qf3 (better 22...Reb8 23.Qe2 Rb2 24.Rb2 Rb2-+) 23.gf3 Reb8 24.Rbe1 Rb2 25.Re5 Rc2 26.Rfe1 (26.Rd1!?-/+) 26...g6 27.Rd5 Rd2 28.Re4 d3 29.Red4 Rb3 30.Kg2? (30.a4 Ra2-+) 30...Kg7 (better 30...Ra3 31.Rd7 Rd1-+) 31.Rd7 Rbb2 (31...Ra3?! 32.Rf4 Ra5 33.Rff7 Kg8 34.Rg7 Kf8 35.f4=) 32.Kg3 Rf2 33.Rd3 Rg2 (better 33...g5!? 34.h4 Rg2 35.Kh3 Rh2 36.Kg4 Rbg2 37.Kf5 Rh4-+) 34.Kf4-/+ Kf6 (better 34...g5!? 35.Ke4 Rge2 36.Kf5 h6-/+) 35.R3d6 Kg7 36.Ra7?? (36.Rd3 g5 37.Ke4 Rge2 38.Kf5-/+) 36...Rb5 (36...Rb3 37.Rda6 Rf2 38.h4-+) 37.Ke4 Rf5 38.f4 (38.Raa6 Re2 39.Kd3 Rf2-+) 38...Rf2 39.Ke3 R2f4 40.Rda6 Rf3 41.Ke4 R3f4 42.Ke3 Rf3 43.Ke4 Rf1 (43...Rh3 44.a4-+) 44.Kd4 (44.a4 R1f4 45.Ke3 Rf3 46.Ke4 Rh3-+) 44...Re1 (44...Rh5 45.Re6 Rh3 46.a4-+) 45.Kc4 (45.Rb6 Rf4 46.Kd5 Re3-+) 45...Rd1 (45...Rc1 46.Kd4-+) 46.Kb4 (46.Rb6 Rf4 47.Kc5 Rd3-+) 46...Rc1 (better 46...Rh5-+) 47.Rc6?? (47.Rd6 Rf3-+) 47...Rb1 (better 47...Rc6 48.a4 Rb6 49.Kc3 Rff6-+) 48.Ka4 (48.Kc4 Rf3-+) 48...Rf4 49.Ka5 Rf5 50.Ka6?? (50.Ka4 Rf3 51.Rcc7-+) 50...Rbb5 (50...Rb3 51.a4-+) 51.Rcc7? (51.Rc3!?-/+) 51...Ra5 (better 51...Rb3!? 52.a4-+) 52.Kb6 Ra7 53.Ka7? (53.Ra7 Rh5 54.a4-+) 53...Rf6?? (better 53...Ra5 54.Kb6 Ra3-+) 54.Kb7 (better 54.Rc3-/+) 54...Rf5 55.Rc6 (55.Ka7 Ra5 56.Kb6 Ra3 57.h4-+) 55...Ra5 (better 55...Rf3 56.a4 Ra3-/+ (56...Rh3?! 57.a5=)) 56.Rb6?? (better 56.Rc3-/+) 56...Ra3-+ 57.Kc7 (57.h4 Rh3-+) 57...Ra7 (better 57...Rh3 58.Kd6-+) 58.Kc6 Ra6?? (better 58...g5-+) 59.Ra6+- Kh6 60.Ra7 Kg7 0-1. black_bishop_88 (2485) - rueoxy001 (2440), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 a6)

4.Nf3= Nc6 5.e3 Nf6 6.c4 (6.Be2 Bd6=) 6...dc4 7.Bc4 b5 (7...Bd6 8.d4=) 8.Bb3 (8.Be2 Bb7=) 8...Bb7 (8...a5 9.Qc2 Bb7 10.Nc3=) 9.0-0 (9.Nc3 Bd6=) 9...Bd6 10.d4 0-0 11.Qd3 (11.Nc3 Ne7=) 11...Ne7 12.Bc2 (12.Nbd2 c5 13.bc5 Bc5=) 12...Ng6 (12...Bf3 13.gf3 Ng6 14.Nc3=) 13.Nbd2 (13.Ne5 Bd5=) 13...Nd5 (13...Qd7 14.Rfc1=) 14.h4 (14.Ne4 Nf6 15.Nfd2 Bd5 16.Nd6 cd6+=) 14...Qf6?? (better is 14...Nf6=) 15.h5+- (15...Nb6 16.hg6 fg6 17.e4+-) 1–0. Wall,Bill – GGM, Internet, 2005.

4.Nf3= Nf6 5.e3 =.

4.f4 b5 5.Nf3 Bb7 6.e3 Nc6 (6...Nf6 7.Be2=) 7.Nc3 h6 (7...d4 8.Na2=) 8.Bd3 Nf6 9.0-0 Be7 10.Qe1 d4 (10...0-0 11.Qg3=) 11.Ne4+= de3 12.de3 Ne4 13.Be4 0-0 14.Rd1 Bf6?? (better is 14...Qe8+/–) 15.Rd8+- (15.Rd8 Rfd8 16.Bf6 gf6 17.Qc3+-) 1–0. marre – oppo, internet, 2010.

4.f4 Nc6 5.Nf3 Na7 6.g3 Bd7 (6...a5 7.e3=) 7.Bg2 Nf6 8.d3 (8.Ne5 Be7=) 8...Bd6 (8...c5 9.c3=) 9.0-0 (9.e4 Be7=) 9...h6 (9...a5!?=) 10.e4+= Nh7 (better is 10...Be7!?+=) 11.Bg7+- Rg8 12.Bh6 (12.Bd4 Nc6+-) 12...Qe7 (better is 12...Qf6!? 13.e5 Qh6 14.ed6 cd6+/–) 13.e5+- Bb4? (13...c6+-) 14.ab4 Qb4 (14...Rg6 15.Bg5 Qb4 16.Bh4+-) 15.c3 (15.f5 ef5 16.Qd2 Qd2 17.Bd2 c6+-) 15...Qb2 16.Ra3 Qb6 17.d4 Bb5 18.Re1 Bc4 (18...Rg6 19.Bg5+-) 19.Nbd2 Rg6 (19...Bd3 20.Re3 Bb5 21.Nh4+-) 20.Bg5 (20.Nc4 dc4 21.Bg5 Nb5+-) 20...Nb5 21.Nc4 dc4 22.Ra1 (22.Qa4 Ng5 23.Ng5 c6+-) 22...Nc3 23.Qc2 Ng5 (23...Nb5 24.Qc4 Ng5 25.fg5+-) 24.Qc3 (24.Ng5?! Qd4 25.Kh1 c6+-) 24...Nf3 25.Bf3 0-0-0 (25...Rd8 26.Red1 c6 27.Qc4+-) 26.Red1 (26.Reb1!? Qd4 27.Qd4 Rd4 28.Rb7 c3 29.Ra6 Rd1 30.Kf2 Rd2 31.Ke3 Rb2+-) 26...Qb3 27.Qb3 cb3 28.Rab1 f6 (28...b6 29.Rb3 a5 30.Bc6+-) 29.Rb3 c6 (29...b6 30.Rc1 fe5 31.de5+-) 30.Kf2 (30.Rdb1 b5 31.Rc1 Rd4 32.Rc6 Kd7 33.Ra6 fe5+-) 30...f5 (30...fe5 31.fe5 Rd7 32.h4+-) 31.Ra1 (better is 31.Rdb1!? Rg7 32.Bc6 b5+-) 31...Rd4 (31...Rd7 32.Rab1 Rc7 33.Rb6+-) 32.Rab1 Rg7 33.Bc6 b5 34.Ke3 (better is 34.Ra3 Rd2 35.Kg1 Rh7+-) 34...Rc4 35.Bf3 Rgc7 36.Rd1 (36.Ra1 Rc3 37.Rc3 Rc3 38.Ke2 Rc2 39.Kd3 Rh2 40.Ra6 Rh6+-) 36...Rd7 (36...Rc3 37.Rd3 Rd3 38.Rd3+-) 37.Rd7 (37.Ra1 Ra7+-) 37...Kd7 38.h4 Rc8 (38...Ke7 39.Ra3+-) 39.Bb7 Rg8 40.Kf3 Rb8 41.Ba6 b4 42.Bc4 Ke7 43.Rd3 (43.h5 Kd7+-) 43...Ra8 (43...Rc8 44.Bb5+-) 44.Rd6 Ra3 45.Kg2 b3 (45...Ra8 46.Rb6 Rd8 47.Be6+-) 46.Re6 Kd7 47.Rb6 Ra2 48.Kh3 Rb2 (48...Kd8 49.Rb3 Ra7 50.Be6+-) 49.Rb3 Rb3 50.Bb3 Ke7 (50...Kd8 51.h5 Ke7 52.h6 Kd8 53.h7 Kc8 54.h8Q Kb7 55.e6 Ka6 56.Qb8 Ka5 57.e7 Ka6 58.Bc4 Ka5 59.Qb5) 51.h5 Kf8 (51...Kd7 52.e6 Kc8 53.h6 Kb8 54.e7 Ka8 55.e8Q Kb7 56.Qb5 Kc7 57.h7 Kd6 58.h8Q Ke7 59.Qhe5 Kd8 60.Qbe8) 52.h6 1–0. carrafurca (2100) – zekota (2145), net–chess.com, 2007.

4.f4 Nf6 5.e3 +=.

5.Nf3 Bd6?? 6.Bg7+- 1–0. Wall,Bill – Nico, chess.com, 2009.

5.Nf3 Nf6 6.c4 Be7 7.d4+= 0-0 8.Nbd2 (8.Nc3 Bd7+=) 8...Na7 (8...dc4 9.Bc4 Nd5 10.0-0+=) 9.Bd3 b5 (9...Nc6 10.0-0+=) 10.cd5+- ed5 (10...Qd5 11.e4 Qb7 12.0-0+-) 11.0-0 (11.Qc2 Bd7+-) 11...Bg4 (11...a5 12.Qc2 ab4 13.ab4 Bb4 14.Rfc1+-) 12.Qc2 Bf3 13.Nf3 h6 (13...Nc8 14.a4 ba4 15.Qa4+-) 14.Ne5 Bd6 15.Qb3 (15.f3 Nc8 16.a4 ba4 17.Ra4 Nb6+-) 15...Qe7 (15...Nc8 16.a4 ba4 17.Qa4+-) 16.a4 Rfe8 (16...ba4 17.Ra4 Rfb8 18.Ra6+-) 17.Rfc1 Be5 (17...Qe6 18.ab5 Nb5 19.Rc6+-) 18.de5 Ng4 19.Be2 Ne5 20.ab5 Nb5 (20...ab5 21.Qd5 c6 22.Qc5 Qc5 23.Rc5+-) 21.Bb5 (21.Qd5?! Qb4 22.Be5 Rad8+=) 21...ab5 22.Ra8 (22.Qd5?! Ra1 23.Ra1 c6+=) 22...Ra8 23.Qd5 Re8 24.Qb5 f6 (24...c6 25.Qe5 Qe5 26.Be5 Re5 27.Rc6+-) 25.Rc7! Qd8 (25...Qc7 26.Qe8 Deflection (26.Qe8 Overloading)) 26.h3 Re7 (26...Qc7 27.Qe8 Kh7 28.Be5 fe5+-) 27.Re7 Qe7 (27...Nf3 28.gf3 Qe7 29.Qb8 Qf8 30.Qf8 Kf8 31.Bf6+-) 28.Be5 fe5 (28...Kh7+-) 29.Qb8 Qf8 30.Qf8 Kf8 31.h4 Ke7 32.Kh2 1–0. marekt – Saladin, ChessWorld.net, 2017.

5.Nf3 h6 6.d4 Nf6 7.c4 (7.Bd3 Bd6+=) 7...Be7 8.Nbd2 g5 (8...0-0!?+=) 9.Bd3+- g4 (9...dc4 10.Nc4 b5 11.Nce5+-) 10.Ne5 h5 (10...a5 11.b5 Ne5 12.de5+-) 11.0-0 (11.Nc6 bc6 12.e4 a5 13.ba5 Ba6+-) 11...Ne5 12.de5 Nd7 13.Rc1 (13.cd5 ed5 14.e6 Nf6 15.ef7 Kf7+-) 13...Nf8 (13...dc4 14.Nc4 Rg8 15.f4+-) 14.cd5+- Qd5 (14...ed5 15.e6! Rh6 16.ef7 Kf7 17.e4+-) 15.Qe2 (15.Ne4 Qd8+-) 15...Ng6 (15...Qd8+-) 16.Rc7 Ne5 17.Be4 Qd8 (17...Qd6 18.Rfc1 Bd7 19.Rb7 Rd8+-) 18.Be5 f6 19.Bf4 e5 (19...Kf7 20.Bb7 Bb7 21.Rb7 e5 22.Qc4 Kf8 23.Be5 fe5+-) 20.Bg6 Kf8 21.Qc4 (21.Qc4 Qe8 22.Be8 Ke8 23.Rc8 Rc8 24.Qc8 Kf7 25.Qh8 ef4 26.Qh7 Ke6 27.ef4 f5 28.Re1 Kd7 29.Qe7 Kc8 30.Qc5 Kd7 31.Re7 Kd8 32.Qc7) 1–0. Janek – quguqu, internet, 2017.

5.Nc3 Ngf6 6.e3 =.

5.Nc3 h6 6.e4 b6? (better is 6...de4!? 7.Ne4 Ngf6 8.Nf6 Nf6=) 7.ed5+/– ed5 8.Nd5 Bb7 9.Bc4 Bd5 10.Bd5 Rb8 (better is 10...Qe7 11.Qe2 Ra7+-) 11.0-0 Ne7 12.Re1 f6 13.Nh4 Ne5 14.Bb3 N7c6 (14...h5+-) 15.Qh5 Kd7 16.Qf5 Ke8 17.Ng6 Ne7 (17...Qd7 18.Qh5 Kd8 19.Nh8+-) 18.Ne7 (better is 18.Re5!? Qd7 19.Qh5 Kd8+-) 18...Be7 (18...Qd7 19.Qh5 Ke7 20.d4+-) 19.Be5 fe5 20.Qf7 Kd7 21.Be6 Kd6 22.Bf5 (22.Re3 b5 23.Bd5 Qg8 24.Qg6 Bf6 25.Bg8 Rhg8+-) 22...Kc6 (22...Qg8 23.Qg6 Bf6+-) 23.Be4 Kd7 24.Bf5 Kc6 25.Be4 Kd7 26.Qd5 (better is 26.Bd5 Qe8 27.Qe6 Kd8+-) 26...Bd6 27.Qf7 (better is 27.d4 c6 28.Qc6 Ke7 29.de5 Be5+-) 27...Kc8?? (27...Be7 28.Bd5 Qe8 29.Qe6 Kd8+-) 28.Qg7+- Qf8 29.Qg4 Kd8 30.d4! ed4 31.Bc6 Qf7 32.Qd4 Rf8 33.Re2 b5 (33...Qh5 34.Kf1 Qe2 35.Ke2 Ke7 36.Qe3 Kf7 37.Qh6 Ke7+-) 34.Rae1 Kc8 (34...Rb6 35.Qf6 Kc8 (35...Qf6?? 36.Re8 Re8 37.Re8) 36.Qf7 Rc6 (36...Rf7?? 37.Re8) 37.Re8 Re8 38.Re8 Kb7+-) 35.Re8 (35.Re8 Re8 36.Re8 Qe8 37.Be8+-; 35.Qg4 Kd8 36.Qf5 Bh2 37.Kh2 Qh5 38.Qh5 Kc8 39.Re8 Re8 40.Re8) 1–0. ghorn (2265) – beammeupscotty (2155), net–chess.com, 2013.

5.e3 h6 6.Be2 c6 7.0-0 b6 8.Re1 Bb7 9.d4 Ngf6 10.Nbd2 c5 11.bc5 bc5 12.c4 cd4 13.Bd4 Qc7 14.Qa4 Rc8 15.cd5 Bd5 (15...Nd5!? 16.Red1 Qc2 17.Qc2 Rc2+/–) 16.Ba6+/– Ra8 17.Rec1 Qd6 18.Rc8 Rc8 19.Bc8 Be7 (better is 19...Bc6 20.Qc2 Be7+-) 20.Ne5 0-0 21.Bd7 (21.Nd7?! Rc8 22.Nf6 gf6+/–) 21...Nd7 (21...Ra8 22.Qb4 Qb4 23.ab4 Ra1 24.Ba1 Nd7 25.Nd7 Bb4+-) 22.Qd7 (22.Nd7?! Bc6 23.Qd1 Qd7+/–) 22...Qd7 23.Nd7 Rd8 24.Nb6 Bb7 25.Nbc4 Ba8 (25...Ba6 26.a4+-) 26.a4 Rb8 (26...Bb4 27.a5+-) 27.a5 Bd5 (27...f6 28.a6 e5 29.a7+-) 28.a6 Rc8 (28...Rd8 29.Nb6+-) 29.Nb6 Rc2 (29...Rd8+-) 30.Nd5 ed5 31.a7 Rd2 (31...Rc8 32.a8Q Ra8 33.Ra8 Kh7+-) 32.a8Q Kh7 33.Qd5 Bf6 (33...Ba3 34.Qf7 Rd1 35.Rd1 Bf8 36.e4 h5 37.Qf8 Kg6 38.Qg7) 34.Qf5 Kg8 (34...g6 35.Qf6 Rd4 36.Qf7 Kh8 37.Ra8 Rd8 38.Rd8) 35.Ra8 Bd8 36.Rd8 1–0. market (2070) – botang (1645), GameColony.com, 2002.

4.d4 c6 5.Bc3 =+.

4.d4 Nc6 5.e3 (5.e4 a6 6.e5 Nh6+=) 5...a6 6.Nf3 Qf6 (6...Bd6 7.a4 ba4 8.c3=) 7.Bd3 Bd6 8.0-0 Nge7 9.Nbd2 e5 (9...Nf5 10.Re1 Be7 11.Nb3+=) 10.de5+= Be5 (10...Ne5 11.Ne5 Be5 12.Be5 Qe5 13.Nf3+/–) 11.Ne5+/– Ne5 12.Rb1 (better is 12.e4+/–) 12...N7c6? (better is 12...Qd6+=) 13.f4+- d4 (13...Bg4 14.fe5 Qg5+-) 14.fe5 Qe5 15.ed4 Qe3 16.Rf2 0-0 17.Qf1 (better is 17.Nf1 Qh6+-) 17...Ne7 (17...Re8+-) 18.Re1 Qg5 19.Ne4 Qg6 (19...Qd5+-) 20.Nf6! Qf6 (20...gf6 21.Bg6 Discovered attack) 21.Rf6 Nd5 22.Rf3 (22.Rf7 Nf6 23.Rf8 Kf8+-) 22...Be6 23.Rh3! Bh3 24.gh3 Rad8 (24...c6 25.c4 Nb6 26.Qf5+-) 25.Re4 (25.c4 bc4 26.Bc4 a5 27.Bd5 Rd5 28.ba5 Rg5 29.Kh1 Ra5+-) 25...f5 26.Rh4 (better is 26.Re6!? Nb6+-) 26...g6 27.c4 Ne3 (27...bc4 28.Bc4 Rfe8 29.Qf3+-) 28.Qf3 (28.Qf4 Rde8 29.Qc7 Rf7+-) 28...bc4 29.Qe3 cd3 30.Qd3 (better is 30.Qe7 Rf7 31.Qd8 Rf8 32.Qc7 Rf7 33.Qc8 Rf8 34.Qc4 Rf7 35.Qd3 g5+-) 30...Rd5 (30...Rd7 31.Qa6 Re7 32.Qc4 Rff7 33.Rf4+-) 31.Qa6 Rd6 32.Qc4 Rf7 33.d5 (better is 33.Rh7! Rdf6 34.Rf7 Rf7+-) 33...Rfd7 34.Qd4 h5 35.Qh8 Kf7 36.Rd4 Ke7 37.a4 (better is 37.Rd2 Re6 38.Qg7 Kd8 39.de6 Kc8 40.Qd7 Kb7 41.e7 f4 42.Qb5 Ka7 43.Bd4 c5 44.Bc5 Ka8 45.e8Q) 37...Rf6 38.b5 f4 39.Re4 1–0. willow27 – patman007, ChessWorld.net, 2005.

4.e3 a6 5.Nf3 Nf6 6.d4 Nbd7 7.Nbd2 Nb6 8.Bd3 Nc4 9.Bc3 Bb7 10.Ne5 c6 (10...Bd6!?=) 11.0-0 (worse 11.Nec4 dc4 12.Be4 Qc7=+) 11...Be7 12.Nb3 (worse 12.Nec4 dc4 13.Be4 Nd5 14.Bd5 cd5=+) 12...a5 (12...0-0 13.Nc5 Qc7 14.Re1+=) 13.ba5 Na3 (13...0-0 14.Qf3+-) 14.Nc5+- Bc5 15.dc5 Nc4 16.Ng4 (better 16.Bc4 dc4 17.a6 Qd1 18.Rfd1 (18.Rad1?! Ra6 19.Ra1 Nd5 20.Ra6 Ba6=; 18.ab7?! Qa1 19.Ra1 Ra1 20.Ba1 Nd7 21.Nc6 f6+-) 18...Ba6 19.Nc6+-) 16...Ng4? (16...Nd7 17.Bg7 Rg8=) 17.Qg4+- f6 (17...Qe7 18.Qg7 Rf8 19.Bc4 bc4+-) 18.Qg7 Rf8 19.Qb7 (19.Qb7 Rc8 A) 20.Bh7?! Rc7 21.Bf6 Rf6+- (21...Rb7? 22.Bg6 Kd7 23.Bd8 Kd8 24.Bd3+-); B) 20.Qh7 Qe7+-; C) 20.Bc4+-) 1–0. Pierre – Johv, internet, 2020.

4.e3 c5 5.bc5 Bc5?? (5...a6 6.a4 Nf6 7.d4+/–) 6.Nf3 (better is 6.Bg7 a6 7.Bh8+-) 6...Nf6 7.Be2 (7.Bb5!? Bd7 8.Nc3+=) 7...0-0 (7...a6=) 8.h4 (8.Bb5 a6 9.Ba4 Nbd7=) 8...Nbd7 (8...a6 9.h5=+) 9.h5 (9.Bb5 Rb8 10.a4 a6 11.Bd7 Rb2 12.Bc8 Qc8=+) 9...h6 10.Nc3 (10.Bb5 Rb8 11.Bd7 Rb2 12.Bc8 Qc8=+) 10...Bb7 (10...a6 11.d3-/+) 11.Bd3 (11.Bb5 Rb8=) 11...b4 (11...a6!?-/+) 12.Na4 (12.ab4 Bb4 13.Ra4 a5-/+) 12...Qe7 (12...Bd6 13.ab4 Bb4 14.Qe2=) 13.ab4 (better is 13.Nc5!? Nc5 14.ab4 Nd3 15.cd3=) 13...Bb4 14.c3 Bd6 15.Qc2 (15.c4 Rfd8-/+) 15...Rac8 (better is 15...e5 16.Be2 a6-/+) 16.e4?? (better is 16.Nd4 Ne5 17.Be2-/+) 16...de4-+ 17.Be4 Ne4 18.Nd4 (18.d3 Ng5 19.Nh4 Rfd8-+) 18...Be5 (better is 18...Qg5 19.Rg1 Qh4-+) 19.Qe4 (19.Nf3-+) 19...Be4 20.f3 Ba8 (20...Qg5 21.Kf2 Bd4 22.cd4 Qd2 23.Kg3 Qg5 24.Kh3 Rc2 25.Rag1 Rg2 26.Rg2 Qh5 27.Kg3 Qf3 28.Kh4 Qg2 29.Bc1 Nf6 30.Bh6 Qg4) 21.Ne2 Bg3 (21...Qg5 22.Kf2-+) 22.Kd1 (22.Ng3 Qg5 23.Rh3 Ne5-+) 22...Bd6 23.Bc1 f6 (23...Qg5 24.Ba3 Ba3 25.Ra3 Qg2 26.Rg1-+) 24.Nb2 Qf7 (24...Nc5 25.Ke1-+) 25.Nd3 Bd5 (25...e5 26.Ke1 e4 27.fe4-+) 26.Bb2 Bc4 27.Kc2 Bd3 (27...Nb6 28.Ndc1-+) 28.Kd3 Nc5 (28...e5 29.Nc1-+) 29.Kc2 Qg6 (29...Qb7 30.Nc1-+) 30.Kd1?? (better is 30.hg6 Rc7 31.d4+/–) 30...Qg2-+ 31.Rg1 Qf3 32.c4 e5 (better is 32...Qb3 33.Ke1 Nd3 34.Kf1 Qb2 35.Ra7 Qb1 36.Kg2 Qb6 37.Rg7 Kg7-+) 33.Kc2 Qd3 (33...Qb3 34.Kb1 Rb8 35.Rg7 Kg7 36.Ra7 Kg8 37.Rg7 Kg7 38.Kc1 Nd3 39.Kb1 Qb2) 34.Kd1-+ Qc4 (better is 34...Nb3!? 35.Bc3 Na1 36.Rg3 Qb1 37.Nc1 Rc4 38.Rd3-+) 35.Bc3 Qb3 36.Ke1 Nd3 37.Kf1 Bc5 38.Rg2 Nf4 (38...Qd5 39.Bd4 Qf3 40.Bf2 Bf2 41.Ng1 Bg1 42.Kg1 Nf4 43.Rh2 Qg3 44.Kh1 Qa3 45.Kg1 Qa1 46.Kf2 Qd4 47.Kf3 Qd3 48.Kf2 Qd2 49.Kf3 Rc3 50.Kg4 f5 51.Kh4 Qh2) 39.Nf4 ef4 40.Re2 Rce8 (41.Re3 fe3-+) 0–1. Q2QQ – Justfish29, Live Game Caissa's Web, 2004.

4.e3 c6 5.Nf3 =.

4.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b5).

4.d4 Bb7 5.e3 Ne7 6.Ne2 (6.Nf3 Nf5=) 6...Ng6 7.Ng3 Nd7 8.c4 dc4 9.Bc4 Be7 (better is 9...Bg2!? 10.Rg1 Bb7+=) 10.0-0+= Nf6 11.Nc3 Nd5 (11...0-0 12.f4+=) 12.Bd5 ed5 13.Qb3 0-0 14.Rac1 (14.Nf5 Nh4 15.Ne7 Qe7=) 14...c6 15.Nf5 Rc8 16.Ne7 Qe7 17.Rc2 (17.Qa4 a6=) 17...Rc7 (17...Qg5!?+=) 18.Rfc1 Rfc8 19.h3 (19.a4 Rd7=) 19...Qg5 (19...Nh4 20.Kh1=) 20.Nb5 Nh4 (20...cb5 A pinning theme 21.Rc7) 21.g3 (better is 21.f4 Qg3 22.Nc7 (22.Na7?? Nf3 23.Kf1 Ba6 24.Rc4 Nd2 25.Kg1 Nb3 26.Nc8 Qe3 27.Kh1 Bc4-+) 22...Nf3 23.Kf1 Nh2 24.Kg1 Nf3 25.Kf1 Nh2 26.Kg1 Nf3=) 21...Re7 (better is 21...Nf3!? 22.Kg2 Ne1 23.Re1 cb5 24.Rc7 Rc7+=) 22.Nd6 Rcc7 23.Nb7 Rb7 24.Rc6 Nf3 25.Kg2 Nh4 26.Kh1 Nf3?? (better is 26...Ng6+-) 27.Rc8 1–0. Slavisa2 – hgflyer, Live Game Caissa's Web, 2004.

4.d4 g6 5.Nf3 Nd7 6.Nbd2 Bg7 7.e4 c6 8.e5 h6 9.c4 Bb7 10.cd5 cd5 11.Rc1 Rc8 12.Bb5 Rc1 13.Qc1 a6 14.Ba4 b5 15.Bb3 Ne7 16.0-0 0-0 17.Re1 Qb8 18.h3 Rc8 19.Qb1 g5 (19...Nb6!?=) 20.Rc1 Rc1 21.Qc1 Nf5 22.a4 ba4 23.Ba4 Nb6 24.Bb3 Qc8 25.Qc8 Bc8 26.Kf1 Bf8 27.Nh2? (better is 27.Bc3!?+=) 27...Bb4-+ 28.Ng4?? (better is 28.Ke2-+) 28...Bd2 29.Ke2 (29.Nf6 Kg7-+) 29...Bb4 30.Nf6 Kg7 31.g4 Ne7 32.Ne8 Kf8 33.Nc7 (33.Nd6 Bd7 34.Bc1 a5-+) 33...a5 (better is 33...Nc4 34.Bc1 Ba5 35.Nd5 ed5-+) 34.Nb5 (34.Kd3 a4 35.Bd1 a3-+) 34...a4 (34...Ba6 35.Kd1 Bb5 36.Bc1-+) 35.Ba2 (35.Bc2-+) 35...Ba6 36.Ke3 Bb5 37.f4 gf4 (better is 37...Nc4 38.Kf3 Nb2 39.fg5 hg5 40.Bb1-+) 38.Kf4 Ng6 39.Kg3 a3 40.Bc1 Bc4 41.Bc4 Nc4 42.Bh6 Kg8 0–1. pillsbury (2145) – beammeupscotty (2160), net–chess.com, 2014.

4.e3 Nd7 5.Nf3 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 b6).

4.Nf3 Ba6 5.d3 Nd7 6.e4 de4 7.de4 Bf1 8.Rf1 Ngf6 9.Nc3 Be7 10.Qd2 0-0 11.0-0-0 c5 (11...Bd6!?=) 12.e5+/- Ng4? (better 12...cb4 13.ab4 Bb4 14.ef6 Qf6+/-) 13.Qd7+- Qd7 (13...cb4 14.ab4 Bb4 15.Qa4+-) 14.Rd7 Rfe8 (14...cb4 15.Re7 bc3 16.Bc3+-) 15.h3 Nh6 16.bc5 Bc5 17.Ne4 Be7 18.Nd6 Bd6 19.Rd6 Nf5 20.g4 (better 20.Rd7+-) 20...Nd6 21.ed6 Red8 22.Rd1 Rd7 (22...f6 23.Rd3+-) 23.g5 (23.Ne5!? Rb7 24.Nc6 Rd7+-) 23...Rad8 24.Be5 Kf8 25.Nd4 Rc8 26.f4 Ke8 (26...a6 27.Re1+-) 27.Nb5 (27.f5 Rc5 28.Re1 Re5 29.Re5 Rd6+-) 27...a6 (27...Kf8 28.Nc7+-) 28.Nc7 Kf8 29.Na6 Ra8 30.Nc7 Ra3 31.Rd3 (31.h4!? Ra5+-) 31...Rd3 32.cd3 g6? (better 32...f6 33.gf6 gf6 34.Bf6 Rd6+-) 33.Kc2 Rd8 34.Kb3 Rb8 (34...h6+-) 35.Kb4 (35.Bf6 Kg8+-) 35...f5 (35...Rd8 36.Kb5 h6 37.Kc6+-) 36.gf6 Kf7 37.Kb5 h6 38.h4 g5 39.fg5 h5 (39...hg5 40.hg5 Rd8+-) 40.Na6 Rb7 41.Kc6 Ra7 42.Kb6 (better 42.Nc7 Ra3 43.d4 Rc3 44.Kb7 Kg6+-) 42...Rd7 43.Nc5 Rd8 44.Kc7 White intends d7 44...Ra8 45.d7 Ra7 46.Nb7 Ra2 47.Nd6 Kg6 48.d8Q Rc2 (48...Ra7 49.Kb8 Kh7 50.g6 Kh6 51.Qf8 Kg6 52.Qg8 Rg7 53.Qg7) 49.Nc4 (49.Kd7 Rc7 50.Kc7 Kh7 51.Qd7 Kg8 52.Qg7) 49...Kf5 (49...Re2 50.f7! Rf2 51.Qg8 Kf5 52.f8Q Kg4 53.Qf2 Kh3 54.Qe6) 50.f7 (50.Qd4 Re2 51.Qf4 Kg6 52.f7 Kh7 53.f8Q Re5 54.Q4f7) ½-½. nemesis_rsu (1640) - dimehola (1870), Rated Classical game, lichess.org, 2013.

4.Nf3 c5 5.d3 (5.bc5 bc5 6.e3 Nf6=) 5...Nc6 (5...cb4 6.e3-/+) 6.Nbd2 (6.b5!? Nce7 7.e3=) 6...cb4+= 7.ab4 Nb4 8.g3 Nf6 9.Bg2 Bd6 10.0-0 0-0 11.Bc3 Bb7 12.Qb1 Nc6 13.Qb2 a5 (13...Re8 14.Bf6 Qf6 15.Qf6 gf6 16.Rfb1-/+) 14.Bf6 Qf6 15.Qf6 gf6 16.Rfb1 Bc7 (16...Bb4 17.c4-/+) 17.c4 Ba6 (better is 17...a4-/+) 18.cd5+= ed5 19.Nh4 (better is 19.Rc1 Bb5 20.Rc6 Bc6 21.Rc1 Bg3 22.Rc6+=) 19...Rfd8-/+ 20.Nf5 Ne5?? (better is 20...Bc8 21.Rc1 Be5-/+) 21.Ne7+- Kf8 22.Nd5 Rac8 23.Nc7 Rc7 24.Rb6 Bc8 25.Rf6 (25.f4 Ng4+-) 25...Re7 (25...Rc2 26.Nf3 (26.Ra5 Rd2 27.Bf1 Rd1-/+) 26...Re2 27.Kf1 Rf2 28.Kf2 Ng4 29.Ke2 Nf6 30.Ra5+/–) 26.Kf1 (26.Rf4!? Ng6 27.Re4 Rc7+-) 26...Ng4 27.Rb6 (27.Rf4 Nh2 28.Kg1 Ng4+-) 27...Nh2 28.Ke1 Ra7 (better is 28...Rd3 29.Ra5 Rd8+-) 29.Nc4 a4 30.Rh6 (30.Rb4 Re7+-) 30...Ng4 31.Rh7 Kg8 (31...Be6 32.Rh4+-) 32.Rh4 Nf6 (32...Ra6 33.Ra3+-) 33.Bc6 Bb7 34.Bb7 Rb7 35.Ra4 Nd5 36.Kd2 Rdb8 37.e4 Nb4 (37...Nb6 38.Ra2+-) 38.Kc3 (38.d4 Rc7 39.Ne3 Nc6+-) 38...Nc6 39.Nd2 Rc7 40.Rc4 Na7 41.Rc7 Nb5 42.Kc2 Nc7 43.Nc4 (43.d4 Rc8 44.Kd3 Na6+-) 43...Ne6 44.f4 Nd4 45.Kd1 (45.Kc3 Ne2 46.Kd2 Nd4+-) 45...Rb3 46.Rg4 Kf8 47.Kd2 Nf3 48.Ke3 Ne1 49.Ne5 Ng2 (49...f6 50.Nd7 Kf7 51.Nc5+-) 50.Kf2 Rb2 51.Kf3 Ne1 52.Ke3 Nc2 53.Kd2 Nb4 (53...Ra2 54.Kc3 Ne3 55.Rh4+-) 54.Kc3 (54.Kc3 Rb1 55.Rg5+-) 1–0. MikeMcC – Reynier, ChessWorld.net, 2004.

4.Nf3 Bd6?? 5.Bg7+- Nc6 6.Bh8 f6 7.d4 Bb7 8.e3 Kd7 9.Bb5 (9.Bd3 Qf8 10.Bh7 Nh6 11.Bf6 Qf6+-) 9...Qe7 (9...Nh6 10.Bf6! Qf6 11.c4+-) 10.Nbd2 (better is 10.c4 Nh6 11.Bf6 Qf6+-) 10...Nh6 11.Bf6! Qf6 12.Qe2 a6 13.Ba4 b5 14.Bb3 e5 15.de5 (15.Bd5!? ed4 16.Ne4 Qg7+-) 15...Ne5 16.0-0-0 a5 17.Qb5 (better is 17.Ne5!? Qe5 18.Qb5 Bc6+-) 17...Bc6 18.Ne5 Qe5 (18...Be5 19.Ne4 Bb2 20.Kb1 Bb5 21.Nf6 Bf6 22.Rd5 Ke7 23.Rb5 ab4+-) 19.Qd3 Nf5 (19...Kd8 20.Qh7 Qf6 21.Nb1 ab4 22.ab4+-) 20.g4 (better is 20.Nf3 Qa1 21.Kd2 Qf6+-) 20...Qa1 21.Nb1 ab4 (21...Ne7 22.b5 Bb7+-) 22.Qf5 Ke7 23.Qh7 Kd8 24.Qg8 Kd7 25.Qf7 Kc8 26.ab4 Bb4 27.g5 (27.Bd5 Ra6 28.Qe6 Kb7 29.Rd3 Bd5 30.Qd5 (30.Rd5? Re6 31.Rb5 Rb6 32.Rb6 Kb6-+) 30...Kb8 31.Qe4+-) 27...Bc3+/– 28.Rdf1?? (28.Qg8 Kb7 29.Qa8 Ka8 30.Rd3 Qb2 31.Kd1 Qb1 32.Ke2 Qh1 33.Rc3 Bb5 34.Kd2-+) 28...Qb2 (28...Qb1! 29.Kb1 Ra1) 29.Kd1+- Bb5 30.Qf8 (better is 30.Nc3 Qc3 31.Ba2 Ra6 32.Qg8 Kb7 33.Qd5 Kb6+-) 30...Kb7 31.Bd5 (better is 31.Nc3 Rf8 32.Nb5+-) 31...Kb6 32.Qh6?? (better is 32.Nc3 Rf8 33.Nb5 Qb5 34.Be4 Rd8 35.Bd3 Rd3 36.cd3 Qd3 37.Ke1 Qc3 38.Ke2 Qc2 39.Kf3 Qf5 40.Kg3 Qg5 41.Kf3 Qf5 42.Ke2 Qc2 43.Ke1 Qc1 44.Ke2 Qc2 45.Kf3 Qf5 46.Ke2 Qc2=) 32...Ka5?? (better is 32...c6 33.Nc3 Qc3 34.Qc6 Bc6 35.Bc6 Kc6-+) 33.Nc3+- Qc3 34.Re1 (better is 34.Ba8 Bf1 35.Rf1+-) 34...Kb4 (34...Rd8 35.Qf6 Rd5 36.Kc1 Qd2 37.Kb1+-) 35.Qh4 (35.Ba8?! Qa1 36.Kd2 Qc3 37.Kc1 Qa1 38.Kd2 Qc3 39.Kd1 Qa1 40.Kd2=) 35...Kc5 36.Qd4! (36.Ba8?! Qa1 37.Kd2 Qa5 38.Qb4 Qb4 39.Kc1 Qa3 40.Kd1 Qa1 41.Kd2 Qa5 42.Kd1 Qa1 43.Kd2 Qa5 44.Kd1 Qa1=) 36...Qd4 37.ed4 Kd5 38.c3 (38.h4 Ra2+-) 38...Kc4 (38...Ra2 39.h4 Ba4 40.Kc1 Rc2 41.Kb1 Rc3+-) 39.g6 (better is 39.Kd2 Bc6 40.Rhg1+-) 39...Kc3-+ 40.h4 (40.Re3 Bd3 41.Rd3 Kd3 42.Kc1 Ra1 43.Kb2 Rh1 44.h3-+) 40...Ra2 (40...Ra1) 41.Re3+- Kd4 (41...Bd3 42.Rd3! Kd3 43.Rh3 Kd4 44.h5 Ra1 45.Kc2+-) 42.Rh2 c5 43.g7 Bc4 44.h5 Ra1 45.Kc2 Ra2 46.Kb1 Ra8 (46...Rf2 47.Rf2 Ke3+-) 47.h6 (47.h6 Bg8 48.h7 Bh7 49.Rh7+-) 1–0. Jokmin,Alex – Lebduska,Daniel, SN–2010-0-00234, 2010.

4.b5 a6 5.a4 Ne7 (5...ab5 6.ab5 Ra1 7.Ba1-/+) 6.e3= f5 (6...Bd7 7.Nf3=) 7.d4 (7.Nf3 Ng6+=) 7...Ng6 8.c4 Be7 (8...dc4 9.Bc4 cd4 10.Qd4=) 9.Nf3 (9.dc5 0-0+=) 9...0-0= 10.Be2 Nh4 (10...f4 11.0-0=) 11.0-0 (11.Nh4 Bh4 12.dc5+/–) 11...g6 (11...Nf3!? 12.Bf3 dc4 13.ba6 Ra6=) 12.Qc2 (12.Nh4 Bh4 13.dc5 Bf6 14.Bf6 Qf6+-) 12...Nd7 (12...Nf3 13.Bf3 cd4 14.Bd4+/–) 13.Nbd2 (better is 13.Nh4!? Bh4 14.cd5 ed5 15.dc5+-) 13...Nf3 14.Nf3 (14.gf3?! f4+=) 14...Bg5? (14...b6 15.Rfd1 ab5 16.cd5 ed5 17.Bb5+/–) 15.Bd3 (15.cd5 ed5 16.dc5 Bf6+-) 15...dc4 (better is 15...Be7!?+/–) 16.Bc4+- cd4 (16...Nb6 17.Ng5 Nc4 18.Nh7 Kh7 19.Qc4 cd4 20.Bd4+- (20.Qd4?! Qd4 21.Bd4 Bd7+/–)) 17.Nd4 Nc5 18.Ba3 b6 (18...ab5 19.ab5 Ra3 20.Ra3+-) 19.Bc5 bc5 20.Ne2?? (better is 20.Be6 Kh8 21.Qc5+-) 20...Bf6 21.Rad1 Qa5 22.Bd3 (22.ba6 Kh8+=) 22...Be7 23.g4 (23.Nf4 g5 24.Nh5 ab5 25.ab5 Qb6+/–) 23...fg4 (better is 23...ab5!? 24.ab5 Qc7=) 24.Bg6+/– hg6? (better is 24...Kh8 25.Bh7 e5+/–) 25.Qg6+- Kh8 26.Qh5 Kg8 27.Qg4 Kh8 28.Qh3 Kg8 29.Qg2 Kh8 30.Qa8 Qa4 31.b6 Qb5 32.Ng3 (32.Nf4 Rg8 33.Kh1 Qb6+-) 32...Qb6 33.Rb1 Qc7 34.Qe4 c4 (34...e5 35.Qg6 Rf6 36.Qe8 Kh7 37.Qh5 Kg7 38.Kh1+-) 35.Rfc1+- c3 36.Rb3 Bf6 37.Ne2 Qg7 (37...Rg8 38.Kh1+-) 38.Kh1 Bd7 39.Nc3 Rc8 40.Na2 Qe7?? (40...Rg8 41.Rb7 e5+-) 41.Rc8 Bc8 42.Rb8 Qd8 43.Qc4 Bb7 44.Rb7 Qa8 (44...Qd5 45.Qd5 ed5 46.Nb4+-) 45.Qe4 (45.Qc7 Qg8 46.Rb8 e5+-) 45...Qg8 (45...Bg7 46.Qh4 Kg8 47.Qe7+-) 46.Rb6 (46.Qf3 Qg7 47.Qh3 Kg8 48.Rb8 Kf7 49.Qh5 Qg6 50.Rb7 Be7 51.Re7 Ke7 52.Qg6 Kd6+-) 46...a5 47.Re6 Qf7 48.f4 Kg7 49.Qg2 Kh7 50.Ra6 Bd8 51.Qc6 Bf6 52.Nc3 Qh5 53.Ra7 (53.Qe4!? Qg6 54.Rf6 Qe4 55.Ne4 a4+-) 53...Bg7 54.Qe4 Qg6 55.Ra5 (55.f5 Qf6 56.Nd5 Qa6 57.f6 Kh6 58.Qh4 Kg6 59.Qg4 Kh6 60.Qh3 Kg6 61.Rg7) 55...Bf6 (55...Qe4 56.Ne4 Bb2 57.Kg2+-) 56.Ra6 (56.Ra7 Kh6 57.Qe6 Bc3 58.Qh3 Qh5 59.Ra6 Bf6 60.Rf6 Kg7 61.Qh5 Kf6 62.Qe5 Kg6 63.f5 Kg5 64.e4 Kh6 65.Qf6 Kh7 66.Qe7 Kg8 67.f6 Kh8 68.Qg7) 56...Qe4 57.Ne4 (57.Ne4 Bh4 58.Ng5 Kg7 59.e4+-) 1–0. Bonetti,Shane – Kibitz, 2000.

4.b5 b6 5.Nf3 Bb7 6.a4 Nd7 7.e3 Ngf6 8.a5 Rc8 9.a6 Ba8 10.Be2 Bd6 11.0-0 h6 12.d3 0-0 13.Nbd2 e5 14.c4 (14.Nh4 Qc7+=) 14...Re8 Black prepares the advance e4 15.cd5 Bd5 16.Qc2 Nf8 17.Nc4 Can e5 get defended? 17...Bc7 (17...Bc4 18.dc4 e4 19.Nd2+=) 18.Nfd2 (18.Nfe5 N8d7 19.f4 Ne5 20.Ne5 Be5 21.fe5 Nd7+/-) 18...e4 (18...Qd7 19.Ne4+=) 19.Ne4 (19.Bf6!? Qf6 20.Ne4+/-) 19...Ne4= 20.de4 Be4 21.Qd1 (21.Qc3 Qg5 22.f3 Bd5=) 21...Qg5 22.g3 Ne6 23.Bf3 (23.Rc1 Red8 24.Qb3 Qg6=) 23...Rcd8=+ 24.Be4 Rd1 25.Rad1 Nd4 26.ed4 (better 26.Bb7 Ne2 27.Kg2=+) 26...Re4-+ 27.Ne3 (better 27.Na3-+) 27...cd4 28.Rd4 Rd4 29.Bd4 Qb5 30.Rc1 Be5 31.Rc8 (31.Be5 Qe5 32.h3 b5-+) 31...Kh7 32.Be5 Qe5 33.Ra8 (33.Rc1 Kg6-+) 33...Qc7 (33...Qa1 34.Kg2 Qa6 35.Rb8-+) 34.h4 (34.h3-+) 34...Qc1 (better 34...b5-+) 35.Kh2 (better 35.Nf1-/+) 35...Qc7 36.Nd5?? (36.Kg1 b5 37.Nd5 Qc1 38.Kg2-+) 36...Qd7 (36...Qc2 37.Ne3 Qf2 38.Ng2-+) 37.Ne3 b5 38.Rb8 Qc6 39.Rb7 Qa6 40.Rf7 b4 41.h5 (41.Rc7-+) 41...b3 42.Nf5 Qa1 (better 42...Qe2 43.Ng7 Kg8-+) 43.Ne7 (43.Rb7 Qf6 44.g4-+) 43...b2 44.Ng6 b1Q 45.Kh3 Qh1 46.Kg4 Qa4 (46...Qe4 47.Rf4 Qd1 48.f3 Qdf3 49.Kh4 Qh1 50.Kg4 Qd1 51.Kh4 Qeh1) 47.f4 (47.Nf4 Qac6 48.Ng2 Qd1 49.f3 Qe4 50.Rf4 Qd7 51.Kh4 Qee7 52.Rf6 Qf6) 47...Qa5 (47...Qad1 48.Kf5 Qhd5 49.Ne5 Qh5) 48.Rf8 (48.Rf5 Qd1 49.Kh3 Qf5 50.Kg2 Qe4 51.Kf2 Qde1) 48…Qah5 (48...Qhh5) 0-1. black_bishop_88 (2575) - Gen_01 (2495), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 c5)

4.c3 cb4 5.cb4 b6 6.d3 a5 7.Nd2 ab4 8.ab4 Bb4?? (better is 8...Ra1 9.Qa1 Nc6+=) 9.Ra8+- Nc6 (9...Ne7 10.Rb8 0-0 11.Ngf3+-) 10.Bg7 Bc3 11.Bc3 f6 12.Ngf3 Qc7 13.g4 (13.e4 Qb7 14.Qa4 b5+-) 13...Qb7 (13...e5 14.Qa4 Nge7 15.g5+-) 14.Qa1 Na5 (14...h6 15.Bf6 Nf6 16.Qf6+-) 15.Bf6 Nf6 (15...Qa8 16.Bh8 Ne7 17.Qg7+-) 16.Qf6 Rf8 17.Qe6 Qe7 18.Rc8 1–0. Janek – Stephen, internet, 2016.

4.c4 Nf6 5.Nf3 Bd6 6.e3 0-0 7.bc5 Bc5 8.d4 Be7 9.Nbd2 Bd7 10.c5 (10.Bd3 Nc6=) 10...b6 11.cb6 (11.Rc1 bc5 12.dc5 Qa5=) 11...Qb6 (11...ab6 12.Bd3=+) 12.Rb1= a5 (12...Qa5 13.Bd3=) 13.Bd3 Bc6 (13...Qd6 14.Ne5=) 14.0-0 Nbd7 15.Qe2 (15.Ne5 Rfb8+=) 15...Bd6 (15...Rab8 16.Ne5 Bb5 17.Bb5 Qb5 18.Qb5 Rb5 19.Nc6=) 16.h3 (16.Rfc1 Rfc8+=) 16...Qd8 (16...Rab8 17.Rfc1=) 17.Rfc1 Rc8 18.Nf1 Nb6 19.Ng3 Na4 20.Ng5 h6 21.h4?? hg5 22.hg5 Ne4 23.Ne4 de4 24.Ba6 Rc7 25.Qg4 Nb2 26.Rb2 Ba3 27.Rcb1 Bb2 28.Rb2 Ra7 29.Be2 a4 30.f4 ef3! 31.gf3 a3 32.Ra2 Bd5 33.Ra1 a2 34.g6 Rb7 35.Bd3 fg6 36.Bg6 Rf6 37.Qh5 Rg6! 38.Qg6 Qb8 39.Kg2 Rb2 (40.Qc2 Rc2 41.Kh3 Qh2 42.Kg4 Rg2) 0–1. alaamattar (2190) – fgoethals (2060), net–chess.com, 2006.

4.bc5 Nc6 5.e3 Qa5 6.Bc3 Qc5 7.Nf3 Bd7 (7...Nf6 8.Bf6 gf6 9.d4 Qa5 10.Qd2=) 8.g3 (8.Qc1 Qb6=) 8...0-0-0 (8...Qe7 9.d4=) 9.Ne5 (9.d4 Qb6+=) 9...Ne5 10.Be5 f6 11.Bd4 Qa5 12.Bg2 Bc5 (12...Ne7 13.Bc3 Qc7 14.Bb4=) 13.Bc3 (13.Bc5 Qc5 14.d4 Qc7+=) 13...Qc7= 14.0-0 Bd6 (14...h5 15.d4 Bd6 16.Qd3=) 15.a4 (15.Bb4 h5=) 15...Ne7 (15...h5 16.Bb2=) 16.a5 (better is 16.Na3=) 16...b6 (better is 16...h5+=) 17.ab6+/– Qb8?? (better is 17...ab6 18.Qh5 Qb7+/–) 18.ba7+- Qa8 19.Na3 (19.e4 Rde8+-) 19...Bc6 20.Bd4 (20.Qg4 Nf5 21.Nc4 Bc7+-) 20...Nf5 (20...Kd7 21.Qe2+-) 21.c4 (21.Nc4 Bc7+-) 21...Nd4 22.ed4 g5 (22...Rd7 23.Qe2 Kd8+-) 23.cd5 ed5 24.Qb3 (better is 24.Qg4 Kc7 25.Qf5 Ba3 26.Ra3+-) 24...Rd7 (24...Kd7 25.Nb5 f5+-) 25.Nb5 Bb5 (25...Kd8 26.Rfc1 Ba3 27.Rc6 Qc6 28.Qa3 Ra7 29.Qa7 Qd7 30.Qb8 Ke7 31.Qh8 Ke6 32.Ra6 Ke7 33.Qg7 Kd8 34.Qf8 Qe8 35.Qd6 Qd7 36.Ra8) 26.Qb5 Ra7 27.Rac1 (27.Rfc1 Kd8 28.Qb6 Ke8 29.Ra7 Be7 30.Re7 Ke7 31.Rc7 Ke8 32.Qe6 Kd8 33.Qd7) 27...Bc5 (27...Kd8 28.Rc6 Qb8 29.Qd5 Rd7+-) 28.Rc5 Rc7 (28...Kd8 29.Re1 Qb7 30.Rd5 Kc7 31.Rd7 Kc8 32.Bb7 Kb8 33.Be4 Kc8 34.Rc1 Rc7 35.Rcc7) 29.Rc7 Kc7 30.Rc1 Kd8 31.Bd5 (31.Qb6 Ke8 32.Qe6 Kd8 33.Qf6 Ke8 34.Re1 Kd7 35.Re7 Kd8 36.Rh7 Ke8 37.Qh8) 31...Qa7 (31...h6 32.Qb6 Ke8 33.Qe6 Kd8 34.Qd6 Ke8 35.Re1) 32.Re1 (32.Qc6 Ke7 33.Qe6 Kf8 34.Qf6 Ke8 35.Rc8 Kd7 36.Qe6) 32...h5 (32...h6 33.Qc6 Rf8 34.Qd6 Qd7 35.Qf8 Kc7 36.Rc1 Qc6 37.Rc6 Kb7 38.Qc8 Ka7 39.Ra6) 33.Qc6 Qd4 (33...Qb6 34.Qb6 Kd7 35.Qc6 Kd8 36.Qd6 Kc8 37.Rc1) 34.Qd6 Kc8 35.Bb7! Kb7 (35...Kb7 36.Re7 Mate attack) 36.Qd4 (36.Re7 Ka8 37.Qc6 Kb8 38.Qb7) 36...Rh6 (36...Rh7 37.Qd5 Kc7 38.Rc1 Kb8 39.Qd6 Ka7 40.Rb1 Re7 41.Qa3) 37.Rb1 Kc8 (37...Kc7 38.Rc1 Kb7 39.Qb2 Ka6 40.Ra1) 38.Rc1 (38.Qd6 g4 39.Rb8) 38...Kb7 39.Qb4 Ka6 40.Ra1 1–0. bombolo – SmallThought, ICS blitz, 2001.

4.bc5 Qc7 5.d4 Nc6 6.e3 Nf6 (6...b6 7.cb6 Qb6 8.Ra2+=) 7.c4+/- Be7 8.cd5 Nd5 (8...ed5!? 9.Nc3 0-0+/-) 9.e4 Nf6 10.d5 Ne5? (better 10...Ne4 11.dc6 Bc5+-) 11.d6+- Bd6 (11...Qc5 12.de7 Nc6 13.Bf6 gf6+-) 12.cd6 Qd6 (12...Qc5+-) 13.Qd6 Nfg4 14.Be5 (better 14.h3 Nf2 15.Be5 f6 16.Bb5 Kf7 17.Qc7 Kg6+-) 14...a6 15.Bg7 Rg8 16.Bd4 b5 17.Be2 Bb7 18.Bg4 (18.Bc5 Be4 19.Qe7) 18...Rg4 19.f3 (19.Bf6 Re4 20.Kf1 Re1 21.Ke1 Bg2 22.Qe7) 19...Rg2 20.Bf6 Be4 (20...Re2 21.Ne2 Be4 22.Qe7) 21.Qe7 1-0. lamah – caramba, Rated Classical game, lichess.org, 2013.

4.bc5 Nd7 5.d4 Ngf6 6.e3 Be7 (6...b6 7.cb6 Qb6 8.Bc3=) 7.c4+= 0-0 8.cd5 ed5 9.Bd3 b6 10.c6 (10.cb6 Nb6 11.Nf3 Nc4+=) 10...Nb8= 11.Qa4 Qd6 12.Bb5 a6 13.Nd2 ab5 (13...Ra7!?=+) 14.Qa8+= Nc6 15.Rc1 Bd7 16.Qa6 Nb8 17.Qa7 Nc6 18.Qb6 Ng4 (18...Nb4 19.Qd6 Nd3 20.Kf1 Bd6 21.Rb1+=) 19.Ngf3 (19.Qb5?! Rb8 20.Rc6 Bc6=+ (< 20...Rb5 21.Rd6 Bd6 22.Bc1+/–)) 19...b4 20.Ra1 ba3? (better is 20...Nce5 21.Qd6 Nd3 (21...Bd6?? 22.de5 ba3 23.Ba3 Ba3 24.Ra3+-) 22.Ke2 Bd6 23.Kd3 Nf2 24.Ke2 Nh1+/–) 21.Ba3+- (< 21.Ra3 Rb8 22.Qa6 Rb2-/+) 21...Qe6 22.Be7 Ne7 (22...Qe7 23.0-0+-) 23.Qe6 Be6 24.h3 Nf6 25.Ke2 Nd7 26.Ra7 Rc8 27.Rb1 Kf8 (27...Nc6 28.Rab7+-) 28.Rbb7 g6 (28...Ke8 29.Ng5 Rd8 30.Ndf3+-) 29.Rd7 (better is 29.Ng5!? Nc6 30.Ne6 fe6 31.Rd7 Na7 32.Rh7 Re8 33.Ra7 Rb8+-) 29...Bd7 30.Rd7 Rc1 (30...Ke8 31.Rb7+-) 31.e4 (31.Ng5 Ke8 32.Rd6 Rc6 33.Rc6 Nc6 34.Nh7 Ke7+-) 31...de4 (31...Ke8 32.Rb7+-) 32.Ne4 Rc2 (32...h6 33.Ne5 Ra1 34.d5 Ra2 35.Kd3+-) 33.Kd3 Rc1 (33...Rc6 34.Nfg5 Ke8 35.Rd6+-) 34.Nfg5 h6 35.Nh7 Ke8 (35...Kg7 36.Re7 Kh7 37.Rf7 Kg8+-) 36.Nef6 1–0. market (1715) – spank_thru (1665), GameColony.com, 2002.

4.d4 cb4 5.ab4 Bb4 6.Bc3 Bc3 7.Nc3 Nf6 8.e3 0-0 9.Nf3 Bd7 10.Bd3 Bc6 11.Ne5 h6 12.Nc6 Nc6 13.g4 (13.0-0 a6-/+) 13...Nb4 14.h4 Nd3 15.cd3 Re8 (better 15...Rc8!? 16.Ra3 Qe7-/+) 16.g5= hg5 17.hg5 Nh7?? (better 17...Nd7 18.Qh5 Kf8=) 18.Qh5+- Qg5 19.Qh7 Kf8 20.Qh5 (20.Nb5 Ke7 A) 21.Na7 Rh8 22.Nc6 bc6 23.Ra8 Ra8-/+ (23...Rh7?! 24.Rh7 Kf6 25.Rh3=); B) 21.Qh2+-) 20...Qh5+/- 21.Rh5 b6 (21...Ke7 22.e4+/-) 22.Rh8 (22.Nb5!? Red8 23.Nc7 Rac8 24.Ra7 Kg8+-) 22...Ke7 23.Re8 Ke8 24.Nb5 a6?? (better 24...Kd7 25.Ra7 Ra7 26.Na7 Kc7+-) 25.Nd6 (better 25.Nc7 Kd7 26.Na8+-) 25...Ke7= 26.Nb7 (26.Nb5 Ke8=) 26...a5 (26...Kd7 27.Nc5 bc5 28.dc5-/+) 27.Rc1? (27.Rb1 a4 28.e4 a3=) 27...a4 (better 27...Kd7-/+) 28.Rc7 Ke8? (better 28...Kf6!? 29.Nd6 a3=) 29.Nd6+/- Kd8 30.Rc2 (better 30.Rf7 Ra6 31.Nb7 Kc8 32.Rg7=) 30...Rb8? (better 30...f6!?+=) 31.Ra2 (31.Nf7!? Ke8 32.Nd6 Ke7+-) 31...b5 32.Nf7 Kd7 33.Ne5 Kd6 34.Nf7 Kc6?? (better 34...Kd7=) 35.Ng5 Ra8 (better 35...Re8+-) 36.Ne6 b4 Black prepares a3 37.Nc5 (37.Ng7 a3 38.Kd2 b3 39.Ra3 Ra3=) 37...a3 38.Nb3 Kb5 39.Kd2 Rc8 40.Nc5 Ka5 41.Kc2 Kb5 42.Kb3 Ka5 (42...g5 43.e4 Rh8 44.e5+-) 43.f4 Kb5 44.f5 Rc5 (44...Rh8+-) 45.dc5 Kc5 46.e4 (better 46.d4!? Kd6+-) 46...de4 47.de4 Kd4 48.Re2 Kc5 (48...Ke5 49.Re1 a2 50.Ka2 b3 51.Kb3 Kf6+-) 49.Rg2 1-0. facebook1 (1645) - sokol88 (1625), Rated Classical game, lichess.org, 2013.

4.e3 cb4 5.ab4 Bb4 6.Nf3 Nf6 7.Nc3 0-0 8.Be2 Nc6 9.0-0 Ne7 10.d3 Ng6 11.e4 Bc3 12.Bc3 de4 13.de4 Qd1 14.Rad1 Ne4 15.Ba1 b6 16.Bb2 Bb7 17.Ba3 Rfc8 18.Rd7 Bc6 19.Rd4 Nc3 20.Ba6 Re8 21.Rc4 Ne2 22.Kh1 Bf3 23.gf3 Nef4 24.Bb5 Rec8 25.Rd4 Rc2 26.Bd3 Nd3 27.Rd3 h6 28.Rd7 a5 29.Rb7 Nf4 30.Rd1 Nh3 31.Rdd7 Rf8 32.Bf8 Nf2 33.Kg2 1–0. Nautiluschess – JohnnyV, internet, 2001.

4.e3 Nf6 5.bc5 Bc5 6.Bb5 Bd7 7.Be2 =+.

4.Bg7?? cb4?? (better 4...Bg7 5.c3 c4-+) 5.Bh8+- Nf6 6.Bf6 (6.Nf3 Nc6+-) 6...Qf6 7.Ra2 ba3 8.Na3 Nc6 9.Nb5 Ne5 (9...Rb8 10.e3 a6+-) 10.Nc7 Kd7 11.Na8 Ng4 (11...Nc6 12.e3 Qe5 13.Qf3+-) 12.Nf3 e5 13.e3 e4 14.Bb5 (better 14.h3 Nf2 15.Kf2 a6+-) 14...Kd8 15.0-0 (better 15.h3 ef3 16.hg4 fg2+-) 15...ef3 16.Qf3 Qf3 17.gf3 Ne5 18.f4 Nf3 19.Kg2 Nd2 (19...Nh4 20.Kg3 Nf5 21.Kf3 Nh4 22.Ke2+-) 20.Kh1 (20.Rd1 Bb4 21.Ra7 Bg4+-) 20...Nc4 (20...Nf1 21.Bf1 a6+-) 21.Rg1 (better 21.Bc4 dc4 22.Rd1 Ke7 23.Ra7 Bg7+-) 21...Nd2 (21...a6 22.Rg8 Ke7 23.Nc7+-) 22.Bc4! Nf3 (22...Nc4 23.Rg8 Combination; 22...dc4 23.Rg8 Combination) 23.Bd3 (better 23.Rg8 Ke7 24.Bd5+-) 23...Ng1 24.Kg1 d4 (24...a6 25.Nb6 Bg4 26.Nd5+-) 25.Kf1 (better 25.ed4!? a6+-) 25...de3 26.Ra7 (better 26.fe3 a6+-) 26...Bc5 27.Ra5 Ba7 (27...Bh3 28.Ke2 ef2+-) 28.Rd5 (28.Rd5 Ke7 29.fe3+-) time forfeit. TwelveTeen (2320) – raketak (1825), lichess.org, 2017. (=1.a3 e6 2.b4 c5 3.Bb2 d5)

5.c4 d4 6.g3 a6 7.Nf3 ab5 8.cb5 Bd6 9.e3 e5 10.Bc4 (10.Bg2 0-0 11.0-0 Bf5-/+) 10...0-0 11.Qc2 (11.ed4 ed4 12.0-0 Bg4-/+) 11...Bg4 12.Ng5 g6 (12...Nbd7!? 13.f3 Bh5-+) 13.0-0=+ h6?? (better 13...Bf5 14.Qb3 Qc7=+) 14.Qg6+- Kh8 15.Qh6 (15.Qh6 Kg8 16.Qg6 Kh8 17.Bf7+-) 1–0. Pierre – GuestBocke, internet, 2020.

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5).

5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 c5 5.b5).

5.b5 Ne5 6.d3 (6.e3 c4+=) 6...a6 (6...Qa5 7.Qd2+=) 7.d4 (7.c4 Ng6+=) 7...Nc4-/+ 8.Qc2 (8.ba6!? Ra6 9.Bc1-/+) 8...ab5-+ 9.e3 Nf6 10.Nd2 Bd7 (10...Bd6 11.Bd3-+) 11.Bd3-/+ Bd6 12.Ngf3 cd4 (12...0-0 13.0-0-/+) 13.ed4 (13.cd4 0-0-/+) 13...Na3 (13...0-0 14.0-0-+) 14.Ba3-/+ Ra3 (14...Ba3 15.0-0-/+) 15.0-0 (15.Ra3 Ba3 16.0-0 0-0-/+) 15...b4 (15...Ra1 16.Ra1 0-0 17.Ne5-/+) 16.cb4-/+ Bb4 (16...Ra1 17.Ra1 0-0 18.b5-/+) 17.Ra3 Ba3 18.Qb3 (better is 18.Rb1-/+) 18...Qe7?? (better is 18...Bd6-/+) 19.Ra1+- 0-0 20.Qa3 (20.Ra3 Rc8+-) 20...Qd8 (20...Qa3 21.Ra3 Rc8 22.Ra7 Rc1 23.Nf1+/–) 21.Ne5 Qc7 (21...Bc6 22.Nc6 bc6 23.Nf3+-) 22.Nd7 (22.Rc1!? Bc6+-) 22...Nd7 23.Rc1 (23.Nb3 Nf6+-) 23...Qf4 24.Qc3 h6 (24...Nf6 25.Rb1+-) 25.Nf3 Nf6 (25...Qd6 26.Qc7 Qa3 27.Bb5+- (27.Qd7 Qc1 28.Bf1 Qc8+=)) 26.Rb1 Ra8 (26...Qb8 27.Qb2+-) 27.h3 (27.Ne5!? Ne4 28.Be4 de4+-) 27...Ne4 28.Be4 (28.Qb2 Nd6+-) 28...de4 29.Ne5 Ra2 30.Qe3 g5 (30...Qe3 31.fe3 Ra7 32.Nc4+-) 31.Qf4 gf4 32.Rb7 h5 (32...Ra1 33.Kh2 e3 34.Rb2+- (34.Rf7?? e2-+; 34.Nf7? e2 35.Nh6 Kf8-+)) 33.Rf7 (33.Nf7 e3 34.fe3 fe3 35.Nh6 Kh8+-) 33...Ra1 34.Kh2 e3 35.fe3 (35.Rf4!? e2 36.Nf3 e1Q 37.Ne1 Re1+-) 35...fe3 36.Rf3 (better is 36.Re7!? e2 37.Nf3+-) 36...e2+= 37.Nd3 Rd1 38.Re3 Rd3 39.Re6 Rd2 (39...Rd4 40.Re2 Kf7 41.g3+/–) 40.Kg3 Kf7 41.Re4 (41.d5 Rd5 42.Re2 Rd4+/–) 41...Rd4 42.Re2 Kg6 43.Re6 (43.Kf3 Rd1+/–) 43...Kf5 44.Re3 h4 45.Kf3 Rf4 46.Ke2 Rb4 (46...Kg5 47.Re5 Kf6 48.Re8+/–) 47.Rf3 (47.g4 hg3 48.Kf3 g2 49.Kg2 Kf4 50.Rf3 Kg5+/–) 47...Ke4+= 48.Rf8 Rb2 49.Kf1 Rb1 50.Kf2 Rb2 51.Kg1 Rb1 52.Kh2 Ke5 (52...Rb4 53.g4+=) 53.Rf3 (53.g4 Rb2 54.Kg1 Rb3+/–) 53...Rb2 54.Rf8 Ra2 (54...Rb1 55.g4 Rb2 56.Kg1 Rb3+/–) 55.Rg8 (55.Rh8 Ra4+/–) 55...Ra4 56.Rg5 (56.Rh8 Kf5+=) 56...Kf6+= 57.Rg4 (57.Rh5!?+=) 57...Rg4= 58.hg4 Kg6 59.Kh3 Kg5 60.g3 hg3 61.Kg3 Kg6 62.Kf4 Kf6 63.g5 ½–½. kode (2345) – bonaparte (2155), net–chess.com, 2008.

5.e3 Nf6 6.Nf3 Be7 7.Bb5 a6 8.Bc6 bc6 9.Ne5 Qb6 10.h4 c4 11.h5 c5 12.d3 (12.h6 Rg8=+) 12...Bd6 13.d4 cd4 14.ed4 Be5 (14...Qc7 15.f4=+) 15.de5=+ Ne4 16.Qe2 0-0 17.Nd2 Nd2 18.Qd2 Qc7 19.f4 f6 20.ef6 Rf6 21.g3 Bb7 22.0-0-0 d4 23.cd4 (better 23.Rh2!? d3 24.Qe3=+) 23...Bh1-+ 24.Rh1 Rc8 25.Bc3 Rf7 26.h6 g6 27.Re1 Qc6 28.Re5 Qa4 (28...Rd8 29.Qe2 Re7 30.Qe4=+) 29.Qb2 (29.Ra5 Qd7=) 29...Qc6 (29...Re7!?=+) 30.Qe2 Qh1 31.Kb2 Qh6 32.Re6 Qf8 (better 32...Qh3!?=) 33.Ra6 Re7 (33...Qh6!?+=) 34.Re6+/- Re6?? (better 34...Rf7+/-) 35.Qe6+- Qf7 36.Qc8 Qf8 37.Qc4 (37.Qc4 Qf7 38.d5+-) 1-0. facebook1 (1615) - 3xaxa (1665), Rated Classical game, lichess.org, 2013.

5.Nf3 Nf6+=.

5.e3 Nf6 =.

5.Nf3 Qc5 6.d4 Qc7 (6...Qb6 7.Ra2=) 7.e3 Bd6 (7...Nf6 8.c4=) 8.Bd3 Nf6 9.Nbd2 0-0 10.0-0 (10.c4 b6=) 10...a6 (10...b5 11.Qe2= (worse is 11.Bb5 Qb7-/+)) 11.Ne5 (11.c4 b6+=) 11...Nbd7 (11...Nc6 12.Ndf3=) 12.Nd7 (12.Ndf3!?=) 12...Bd7 (worse is 12...Qd7 13.c4+=) 13.c4 (13.f4 Ba4+=) 13...dc4 (13...Bh2 14.Kh1 dc4 15.Nc4+=) 14.Bc4 (14.Nc4 Bh2 15.Kh1 Bd6+=) 14...b5 (14...Bh2 15.Kh1 Bd6 16.Bd3-/+) 15.Bb3 (15.Bd3 Bh2 16.Kh1 Bd6-/+) 15...Bh2 16.Kh1 Bd6 17.Ne4?? (better is 17.Qf3-/+) 17...Ne4-+ 18.Rc1 (18.d5 Nc5-+) 18...Qd8 19.d5 (19.g3-+) 19...Qh4 0–1. alaamattar (2100) – wbartier (1910), net–chess.com, 2005.

5.Nf3 Qc5 6.e3 Nc6=.

5.Nf3 Qc5 6.e3 Nd7 7.a4 (7.Bd4 Qd6+=) 7...Ngf6 8.Na3 (8.Nc3 Qa5+=) 8...a6= 9.c4 b6 (9...Bd6 10.Qc2=) 10.Rc1 Qb4 11.Qc2 (11.Rb1 Qd6+=) 11...Bb7 (11...Nc5 12.a5 ba5 13.Be2=+) 12.Rb1 Qd6 (12...Qc5 13.Be2=) 13.cd5 (13.a5!?+-) 13...Nd5 14.Nc4 Qc7 15.Nd4 (15.Bd4 f6 16.Qb2 b5 17.ab5 ab5 18.Qb5 Bc6=) 15...Nc5 (better 15...e5 16.Nf3 b5=+) 16.Be2?? (better 16.Ba3=) 16...Nb4-+ 17.Qc3 Na4 18.Qb3 Nc5 19.Qa3 (19.Qb4 Nd3!! 20.Bd3 Bb4-+) 19...Bg2 20.Rg1 (20.Qb4 Nd3!! 21.Bd3 Bb4 22.Rg1-+) 20...Qh2 21.Rg2 Qg2 22.Ne5 (22.Qb4?? Qh1 23.Bf1 Nd3 24.Ke2 Nb4-+) 22...Ne4 (better 22...Qg1 23.Bf1 Ne4-+) 23.Bb5?? (better 23.Qa4 b5 24.Bb5 Ke7 25.Ndc6 Nc6 26.Nc6 Ke8 27.Ne5 Ke7 28.Nc6 Kd7 29.Ne5 Ke7 30.Nc6=) 23...Kd8-+ (23...ab5 24.Qa8 Ke7 25.Qb7 Kf6 26.Qf7 Kg5 27.Ndf3 Kh6 28.Qf4 g5 29.Qe4+-) 24.Nf7 Ke7 25.Nc6 Kf7 26.Ne5 Kg8 27.Bc3 0–1. Moraes,Maurino Anastacio D – Bernadino,LH, 1st Internacional Xadrez Educa, 2010.

5.Nf3 Nf6 6.Bc3 Qc5 7.d4 (7.Bb4 Qc7=) 7...Qc7+= 8.e3 Bd6 9.Bb5 (9.Bd3 0-0+=) 9...Bd7 10.Qd3 (10.Bd3 0-0+=) 10...a6 (10...0-0 11.Bb4-/+) 11.Bd7+= Nbd7 12.0-0 Rc8 13.Rc1 a5 14.a4 Ne4 15.Bb2 g5 (15...Nb6 16.Ba3+=) 16.h3 (16.Na3 g4 17.Nb5 Qb8 18.Nd6 Qd6=) 16...h5 17.c4 (17.Nfd2 g4 18.Ne4 de4 19.Qe4 Nf6=) 17...g4+= 18.Na3 (18.Nfd2!? gh3 19.gh3 Rg8 20.Kf1+=) 18...gf3-+ 19.cd5 Bh2 20.Kf1 fg2 (better is 20...Ng3!? 21.fg3 fg2 22.Kg2 Qg3 23.Kf1 Rd8-/+) 21.Kg2= Rg8 22.Kf1 Rg1 (better is 22...Ndc5!? 23.dc5 ed5 24.Qd5 Qe7=) 23.Ke2+/– Ng3? (better is 23...Rc1 24.Rc1 Qd8 25.Qe4 Rc1 26.Bc1 Nf6+-) 24.fg3?? (better is 24.Kf3 Rc1 25.Rc1+-) 24...Rg2= 25.Kf1?? (better is 25.Kd1 Rg1 26.Ke2 Rg2 27.Kd1 Rg1 28.Ke2=) 25...Qg3 26.Rc8 (26.Qf5 ef5 27.Rc8 Ke7 28.d6 Kf6 29.d5 Ne5 30.Be5 Ke5 31.Nc4 Kf6 32.Ra2 Qf3 33.Ke1 Bg3 34.Rf2 Rf2 35.Na5 Qe2) 26...Ke7 27.d6 (27.Qf5 ef5 28.d6 Kf6 29.d5 Ne5 30.Be5 Ke5 31.Re8 Kf6 32.Ra2 Qf3 33.Ke1 Bg3 34.Rf2 Qf2 35.Kd1 Qd2) 27...Kf6 28.d5 (28.Qg6 fg6 29.d5 Kg5 30.h4 Kg4 31.Rc4 Kh3 32.Rc2 Qf3 33.Ke1 Qe3 34.Kd1 Rg1) 28...e5 29.Qc2 (29.Qg6 fg6 30.Be5 Ne5 31.Rf8 Nf7 32.Rf7 Kf7 33.Ra2 Qf3 34.Ke1 Qe3 35.Re2 Qe2) 29...Qf3 30.Ke1 Bg3 0–1. Iher,Mirjam – February,Jesse Nikki (1685), Durban RSA, World Ch U18 (g), 2014.

5.Nf3 Nf6 6.c4 Nbd7 =.

5.Nf3 Nf6 6.e3 =.

5.d4 Qf6 6.dc5 (better 6.e3!?=) 6...Qb2-/+ 7.Nc3?? (better 7.Nd2-/+) 7...Qc3-+ 8.Qd2 Qa1 9.Qd1 Qa3 10.e3 Qc5 11.Qb1 Nf6 12.Bb5 Bd7 13.Bd7 Nfd7 14.Qb7 0-0 (14...Nb6 15.Ne2-+) 15.Qa8 Qc2 16.Qa7 Qc3 17.Ke2 Rc8 (better 17...Qc2 18.Ke1 Ne5-+) 18.Qa2 h6 (better 18...Nc5 19.h4 Qd3 20.Kf3 Qf5 21.Kg3 Ne4 22.Kh2 Qf2 23.Qf2 Nf2 24.Ne2 Nh1 25.Kh1-+) 19.Nf3 Qc4 (19...Ne5!? 20.Ne5 Qe5 21.Qa4-+) 20.Qc4 dc4 21.Rc1 g5 22.Rc3 f6 23.Nd2 Ne5 (better 23...Nb6!? 24.f4-+) 24.f4 gf4 25.ef4 Nd3 ½-½. joshie - MRS_1, Rated Classical game, lichess.org, 2013.

5.e3 Nc6?? 6.Bg7+- Nf6 7.Bh8 Bd7 8.Nc3 Ke7 9.Bf6 Kf6 10.Nf3 (10.Qg4 Ne7+-) 10...Ke7 11.Bb5 a6 12.Bc6 Bc6 13.d4 Qc7 (13...Bd6 14.0-0+-) 14.Qd2 (14.dc5 Rc8+-) 14...Rd8 (14...Bd6 15.Qd3+-) 15.Ne5 (15.dc5!? e5+-) 15...f6 (15...Bd6+-) 16.Nc6 bc6 (16...Qc6 17.dc5 Qc5 18.Ne2+-) 17.0-0 (17.dc5 Qa7+-) 17...e5 (17...Bd6 18.f4 Qa5 19.Qd3+-) 18.Na4 (better is 18.dc5 Ke8+-) 18...Ba7 (18...Bd6 19.Rfb1+-) 19.de5 Qe5 (19...fe5 20.c4!+-) 20.c4! dc4 (20...Bb8 21.f4 Qd6 22.Qd3+-) 21.Qb4 c5 22.Nc5! Qc5 (22...Bc5 23.Qb7 Double attack; 22...Qc5 23.Qb7 Double attack) 23.Qb7 Rd7 24.Qf3 (24.Qe4 Kf8 25.Rfd1 Qe7 26.Qc4 Rb7+-) 24...Kf7 (24...Qd5 25.Qg4 Qe6+-) 25.Qh5 (better is 25.Qh3 Rc7 26.Qh7 Ke8 27.Qg8 Qf8 28.Qe6 Qe7 29.Qa6+-) 25...Kg7 (better is 25...Qh5 26.Rac1 Rd2 27.Rc4 Be3 28.Rc7 Kg6-+) 26.Qg4+- Kf7 (26...Kh6 27.Qd7 Bb8+-) 27.h4 (better is 27.Qd7 Kg6 28.Rad1+-) 27...f5 (27...Rc7 28.Rfd1 Qe7 29.Rac1+-) 28.Qg5 1–0. Fournier,Frederic (1830) – pradeepan (1610), A match in KasparovChess Playing Zone, 2002.

5.e3 Nf6 6.Nf3 0-0 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.Be2).

5.Bg7+- Qb6 6.d4 (6.e3 d4 7.Qe2 Bd7+-) 6...Qb2 7.c3 (7.Nd2 Bd4 8.Bh8 Bh8+=) 7...Bd7?? (better is 7...Bf8 8.Bf8 Kf8+/– (8...Qa1?? 9.Bg7+-)) 8.dc5 (better is 8.Nd2 Qc3 9.e3 (9.dc5?! Qg7 10.e3 Nc6=) 9...Ba3 10.Bh8+-) 8...Na6 (8...Qa1 9.Bh8 Bb5 10.Nf3+-) 9.Bh8 (9.Nd2 f6+-) 9...Nc5 (9...Qa1 10.Bd4 Rc8+-) 10.Nd2 f6 11.c4 Na4 (11...d4 12.Ngf3+-) 12.e3 Rc8 (12...h6 13.Rb1 Qa3 14.cd5 ed5 15.Qh5 Ke7 16.Ne2+-) 13.Qc1 (better is 13.Qh5!? Ke7 14.Qh7 Kd6+-) 13...Qe5 (13...Qc1 14.Rc1 b5 15.c5 Nc5 16.Kd1+-) 14.Rb1 (14.Ngf3!? Qh5 15.Qd1 b6+-) 14...b5 15.Qc2 Qh5 16.h3 (16.Ngf3 bc4 17.Rb7 Qg6 18.Qg6 hg6 19.Ra7 Rb8+-) 16...Qh6 17.Bd3 (17.Ngf3 Ne7 18.Nh2 e5+-) 17...a6 (17...Ne7 18.c5 Rc5 19.Qd1+-) 18.Rb4 (18.Ngf3 dc4 19.Be4 f5+-) 18...Qf8 (18...dc4 19.Bf1+-) 19.Qd1 Nc5 (19...Ne7 20.Qh5 Qf7 21.Qh4+-) 20.Qh5 Qf7 21.Qh7 Nd3 (21...Ne7 22.Ngf3+-) 22.Qd3 dc4 23.Nc4 (better is 23.Qd4 c3 24.Ne4 c2 25.Nd6 Kf8+-) 23...bc4 24.Rc4 (better is 24.Qc2 Qh5 25.Bg7 Kf7+-) 24...Rd8 (24...Rc4 25.Qc4 Qh7+-) 25.Rh4 Bc6 (25...Bb5 26.Qc2 Rd7 27.Nf3+-) 26.Qc2 Qc7 27.Ne2 Qa5 (27...f5 28.Bd4 Qa5 29.Qc3 Qc3 30.Nc3+-) 28.Qc3 (28.Rb4 Ba8+-) 28...Ba4 (28...Qc3 29.Nc3 Rc8 30.Kd2+-) 29.0-0 (29.Qa5?? Rd1) 29...Qb5 (29...Qc3 30.Nc3 (30.Ra4 Qc2 31.Rg4 Qh7+=) 30...Bc2 31.Rc1+-) 30.Nd4 (better is 30.Bf6!? Ra8+-) 30...Qd5 (30...Qe5 31.Qd3 Ne7 32.Qa6+-) 31.Qb4 Bb5 (31...Bd7 32.Bf6! a5 33.Qb6+-) 32.Nb5 (32.Ne6 Qe6 33.Re4 Qe4 34.Qe4 Kf7+-) 32...ab5 33.Qg4 (better is 33.Rd4!? Qa8 34.Rg4 Ne7 35.Bf6 Rd7+-) 33...e5 34.Qg6 (better is 34.Bf6 Nf6 35.Qg7 Qf7 36.Rh8 Ke7 37.Qf7 Kf7 38.Rd8 Ne4+-) 34...Kd7 (34...Qf7 35.Qf5 Qd7 36.Qd7 Rd7 37.Rb1+-) 35.Bf6 (better is 35.Rh7 Ne7 36.Bf6 Re8+-) 35...Kc8 (35...Nf6 36.Qf6 Qd6 37.Qg7 Kc8 38.Rc1 Kb8+-) 36.Bd8 Qd8 37.Rh8 Qa5 38.Qg8 Kb7 39.Qc8 Kb6 40.Qd8 Ka6 41.Rh6 Kb7 1–0. Frech,Josef – Pichler,Anna, Schwarzach op–C, 2001.

5.Bg7+- Qb6 6.e3 d4 7.Qe2 Bd7 +-.

5.Bg7+- Nc6 6.Bh8 f6 (6...Nf6 7.e3+-) 7.e3 d4 (7...Qc7+-) 8.Qh5 Kd7 9.Qc5 de3 (9...Nh6 10.Qh5+-) 10.fe3 (10.Qe3!? Ke8+-) 10...Nh6 11.Bg7 (better is 11.Qh5 Qh8 12.Qh6 b6+-) 11...Qe7 (11...Nf5 12.Qf8 Qe7+-) 12.Qe7 Ke7 13.Bh6 Bd7 14.Nf3 Rc8 15.Nc3 Na5 16.Bf4 e5 17.Bg3 e4 18.Nd4 (18.Ne4!? Rc2 19.Bh4 h6+-) 18...f5 19.Be2 a6 20.0-0 (20.Nd5 Kf7 21.Bh5 Kg7+-) 20...Kf6 21.Rf4 (21.Ne4 Kg6 22.Nd6 Rc5+-) 21...Kg5 22.Raf1 Nc4 23.Bh4 (23.Ne4 Kh6 24.Nf5 Bf5 25.Rf5 Rc6 26.Rf6 Kg7 27.Rf7 Kh8 28.Bc4 Re6 29.Be6 b5 30.Be5 Kg8 31.Re7) 23...Kh6 24.Bc4 Rc4 25.Nf5 Kg6 26.Nd6 (26.Rg4 Kf7 27.Rg7 Kf8 28.Be7 Ke8 29.Nd6) 26...Rc6 27.Nde4 (27.Nde4 Kh5 28.Nd5+-) 1–0. Fournier,Frederic – medomo, Active, 2007.

5.Bg7+- Bd4 6.Bd4 Nf6 7.e3 +-.

5.Bg7+- Be7 6.Bh8 Bf6 7.Nc3 (better is 7.Bf6 Nf6 8.Nf3+-) 7...Bh8 8.Rb1 (8.d4 e5 9.e3 Nc6+-) 8...Nc6 9.e4 (9.e3 Bc3 10.dc3 Qa5+-) 9...d4 (better is 9...Bc3 10.ed5 ed5 11.dc3 Qe7 12.Qe2 Be6+-) 10.Nb5?? (better is 10.Nce2+-) 10...a6= 11.Qg4 Kf8 (11...Nf6 12.Qg3 ab5 13.e5+=) 12.Nf3 (12.Qh5 ab5 13.Qh7 Bg7+=) 12...ab5= 13.Bb5 (worse is 13.Rb5 Ra3 14.Rb1 e5-/+) 13...e5 14.Qh4 (better is 14.Qh5!? Nf6 15.Qh4=) 14...Qh4-/+ 15.Nh4 Bf6 (15...Nf6 16.f3+=) 16.Nf5 (16.Nf3 Ra3 17.Ke2 Bg4+=) 16...Bf5-/+ (worse is 16...Ra3 17.Bc6 Bf5 18.Bb7=) 17.ef5 Rc8 (better is 17...Ra3!? 18.Ke2 Nge7-/+) 18.0-0 (18.Bd3 Rc7=) 18...Kg7 0–1. saetta – Betty, ICS, 1999.

5.d3 Bc5=+ 6.Nd2 Nf6 7.Ngf3 Nc6 8.Nb3 (8.c3=+) 8...e5 (8...Qb6 9.Rb1=+) 9.c3 (better is 9.Nc5!? Qa5 10.c3 Qc5 11.cd4 ed4 12.Rc1=) 9...Bb6 10.cd4 Nd4 (10...ed4 11.Rc1=+) 11.Nbd4 (11.Ne5!? Be6 12.Nd2+=) 11...ed4=+ 12.h3 (12.Qa4 Bd7 13.Qb3 Bc6=+) 12...0-0 13.g3 (13.Rc1 Ba5 14.Nd2 Qb6-/+) 13...Nd5 14.Rc1 Ba5 15.Nd2 Nc3 16.Qc2 Be6 17.Bg2 Rc8 (17...Na2 18.Ra1-/+) 18.Bc3 Rc3 19.Qb1 (19.Qb2 Qb6 20.Qb1 Rfc8-+) 19...Qb6 (19...Rb3! 20.Qc2 Ra3-+) 20.0-0-/+ Rc1 21.Qc1 Rc8 22.Qd1 (22.Nc4 Bc4 23.dc4 Qe6=+) 22...Qb2-/+ 23.Nb1?? Bb3-+ (24.Nc3 Bd1 25.Nd1 Qe2-+) 0–1. Betke,Arno – Dupke,Andreas, Mecklenburg LL, 1992.

5.e3!? de3 6.fe3 +=.

5.d4 b6 6.cb6 Qb6 7.Bc1 Nc6 8.Nf3 Be7 9.Bf4 (better is 9.e3!?+=) 9...Qb2+= 10.Nbd2 Nd4 11.Nd4 Qd4 12.e3 Qc3 13.a4 0-0 14.Bb5 (better is 14.Rb1!?-/+) 14...Ne4-+ 15.Ke2 (15.Rb1 Bb4 16.Ke2 Nd2 (16...Qd2?! 17.Qd2 Bd2 18.f3+=) 17.Rb4 Qb4 18.Qd2 Qe7-+) 15...a6 (better is 15...e5!? 16.Bg3 a6-+) 16.Bd3-/+ e5 (16...Rd8!? 17.Qe1 Qc6-/+) 17.Ne4+= de4 18.Be4 Bg4 19.f3 ef4 20.Ba8 Qe3 (worse is 20...fe3 A) 21.fg4 Ra8 22.Qd3 Qc6 23.Qe3 Bf6-+ (23...Qg2 24.Qf2 Qc6 25.Qf3 Qc2 26.Kf1+=; 23...Qc2?! 24.Kf3 Qc6 25.Kg3=); B) 21.Qd3 Qc7 B1) 22.Qe3 Qc2 23.Qd2 Qc4 24.Qd3 Qe6 25.Kf2 Bc5 (25...Ra8?! 26.Rhe1 Qb6 27.Kf1-+) 26.Kf1 Ra8-+; B2) 22.Qa6 Qc2 23.Ke3 Bg5 24.Kd4 Rd8 25.Bd5 Qd2 26.Kc4 Qd5 27.Kc3 Qd2 28.Kb3 Rb8 29.Kc4 Rb4 30.Kc5 Be3 31.Kc6 Qd7; B3) 22.Bd5+/–) 21.Kf1 Bc5 (21...Be6 22.Be4 Rd8-/+) 22.Qe1= Be6 (22...Qd4 23.fg4 Ra8 24.a5=) 23.Qe3+= Bc4? (better is 23...fe3!? 24.Be4 Bc4 25.Bd3 Bd3 26.cd3 Rb8+/–) 24.Qd3! Bd3 25.cd3 Ra8 26.Rc1 Be3 27.Rc6 Rd8 (27...Kf8 28.g3+-) 28.Ra6 g5 29.Ke2 Rb8 30.d4! Rb2 (30...Bd4 31.h4 Combination) 31.Kd3 Rg2 32.Ra5 h6 33.d5 Rd2 34.Ke4 Re2 (34...Bf2 35.Kf5+-) 35.Kf5 Bd4 (35...Kg7 36.Rd1 Rh2 37.d6+-) 36.d6 Bc3 (36...Kg7 37.Rd5 Bf6 38.d7+-) 37.Ra8 Kg7 38.d7 Bf6 39.d8Q Re5 40.Kg4 Bd8 41.Rd8 f5 (41...Kg6 42.Rhd1 h5 43.Kh3+-) 42.Kh5 Re3 43.Rf1 Re2 (43...g4+-) 44.Rh1 (44.Rd7!? Kf6 45.Rd6 Kf7 46.Rh6 g4+-) 44...Re3 45.h4 Rf3 (45...gh4 46.Rd6+-) 46.hg5 hg5 47.Kg5 Rg3 48.Kf4 (48.Kf4 Rg2 49.a5+-) 1–0. Vlahakis,Georgios – Kontaki,Maria, Heraklio op, 2008.

5.d4 b6 6.cb6 Qb6 7.Bc3 Nc6 8.Nf3 Ne4 9.Bd2?? (better 9.Ra2=) 9...Qb2-+ (9...Nd4?! 10.Be3 Qa5 11.Nfd2-/+; 9...Nd2?! 10.Nbd2 (10.Qd2?? Qb2-+) 10...Nd4 11.Nd4 Qd4 12.e3=+) 10.e3 (10.Nc3 Nc3 11.Qc1 Qc1 12.Bc1-+) 10...Qa1 11.Bb5 Bd7 12.Bc1 (12.0-0-+) 12...Qb1 13.a4 (13.Bd3 Ba3! 14.0-0 Qc1 15.Qc1 Bc1 16.Rc1 Nc3-+) 13…Qb4 (13...Qb4 14.Bd2 Nd2 15.Qd2 a6-+) 0-1. Atilla_10 (2125) - armine (2135), Rated Blitz game, lichess.org, 2015.

5.d4 Nc6 6.Nd2 Be7 7.e3 0-0 8.Ngf3 a6 (8...b6 9.cb6 ab6 10.c4+=) 9.Bd3 Nd7 (9...b5 10.cb6! Qb6 11.Rb1+/-) 10.0-0 Qc7 (10...b6 11.cb6 Nb6 12.c4 dc4 13.Nc4 Nc4 14.Bc4+/-) 11.c4+- e5?? (better 11...Nf6+-) 12.cd5 Nd8 (12...ed4 13.ed4 (worse 13.dc6 Nc5 14.cb7 Qb7+-) 13...Nd8 14.d6 Bd6 15.cd6 Qd6 16.Qc2+-) 13.d6 (13.d6 Bd6 14.cd6 Qd6 15.Nc4+-) 1-0. black_bishop_88 (2480) - Dondimi (2345), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 c5)

5.d4+= Nc6 6.e3 b6 7.cb6 Qb6=.

5.d4+= Nc6 6.Nf3 b6= 7.cb6 Qb6 8.Qc1 (8.Bc3 Ne4=) 8...Bd6 (better is 8...Rb8 9.Ra2 Qa5 10.Nbd2 Ba6=) 9.c3?? (9.Nbd2 Rb8 10.Rb1 Qa5+=) 9...0-0 (9...Rb8 10.c4 Qb2 11.Qb2 Rb2 12.e3-+) 10.e3?? (better is 10.c4 dc4 11.Nbd2=) 10...Rb8-+ 11.Ra2 (11.c4 Qb2 12.Qb2 Rb2 13.Nbd2-+) 11...Ba6 (better is 11...Qb3 12.Ra1 Qb2 13.Qb2 Rb2-+) 12.Ba6 (12.Nbd2 Bf1 13.Rf1 Qa5+=) 12...Qa6 13.Nbd2 Na5 14.Ba1 (14.Qc2 Rfc8+=) 14...Rfc8 (better is 14...Rb7+=) 15.Rb2? (better is 15.Qc2+=) 15...Ba3-+ 16.Rb8 (16.Ne5-+) 16...Bc1 17.Rc8 Qc8 18.Ke2 (18.0-0 Bd2 19.Nd2 Qa6-+) 18...Bd2 (18...Qa6 19.c4 Bd2 20.Nd2 Nc4 21.f3 Nb2 22.Kf2-+) 19.Nd2 Nc4 (better is 19...Qa6!? 20.Kf3 Qd3 21.Rb1-+) 20.Rb1 Nd2 (20...Ng4 21.Nf1-+) 21.Kd2 Ne4 22.Ke1 Nc3 (better is 22...Qc7 23.g3 h5-+) 23.Rc1 Qc7 (23...Qb8 24.Bc3 Qh2 25.Bd2-+) 24.Bc3 (24.Rc3 Qa5 25.Ke2 Qa2 26.Kf3 h5 27.Rc8 Kh7-+) 24...Qh2 25.Ke2 (25.Bd2 g5 26.g3 h5-+) 25...Qg2 26.Be1 (26.Ra1 g5 27.Ra7 g4-+) 26...h5 27.Ra1 h4 28.Ra7 (28.Bb4 Qg4 29.Kd2 Qf3-+) 28...h3 29.Ra8 Kh7 30.Bb4 Qg1 (better is 30...h2 31.Ra1-+) 31.Bc3 (31.Bd6 h2 32.Bh2 Qh2-+) 31...h2 (31...Qg4!? 32.Kd2 h2 33.Ra1-+) 32.Ra1 Qg2 (better is 32...Qa1 33.Ba1 h1Q-+) 33.e4 (33.Bb4-+) 33...de4 34.Bd2 Qf3 0–1. macedon (2065) – bonaparte (2155), net–chess.com, 2008.

5.d4 g6 6.e3 Bg7 7.c4 Nc6 8.Nc3 a6 9.Nf3 0-0 10.Na4 dc4 11.Bc4 Qa5 (11...Qa5 12.Bc3 Qc7+-). nordlicht (1985) – checkbo, gameknot.com, 2012.

5.b5 Nce7 6.Nf3 Ng6 7.Be2 Nf6 8.h4 h6 9.h5 Ne7 10.Rg1 (better 10.Be5!?=) 10...Nh5=+ 11.Ne5 Nf6 12.g4 Qc7 Black prepares c4 13.f4 Bd7 14.d3 (14.c4 Rd8=+) 14...Rc8 (14...Bb5!? 15.c4 dc4 16.dc4 Bc6-+) 15.a4 (15.g5 hg5 16.fg5 Nfg8=+) 15...c4 (15...d4!? 16.c4 de3-/+) 16.dc4= dc4 17.Nc4 Ned5 18.Be5 Qc5 19.Bd4 Qc7 20.c3 (20.Ba7? b6 21.Bb6 Nb6-+) 20...Bc5 21.Ne5?? (21.Qd2 g5=) 21...Bd4?? (better 21...Ne3 22.Be3 Be3-+) 22.Qd4=+ Qc5 23.c4 (23.Qc5 Rc5 24.c4 Ne3+=) 23...Qd4=+ 24.ed4 Nf4 25.Nd7 (better 25.Bf3!? Rc7 26.a5=) 25...Nd7 26.c5? (better 26.Nd2!?-/+) 26...e5-+ 27.de5 Rc5 28.Bf3 Re5 (better 28...Rc1 29.Bd1 Ne5-+) 29.Kf2? (29.Kf1 Nc5-+) 29...0-0 (better 29...Nh3 30.Kg2 Ng1 31.Kg1-+) 30.Kg3 g5 (30...f5 31.gf5 Ref5 32.Nd2-+) 31.Nc3 (31.Rh1 Kg7-+) 31...Nc5 32.Rae1 Rfe8 33.Re5 Re5 34.Rd1?? (34.Rc1-+) 34...Re3 35.Nd5 (35.Rc1 Nb3 36.Nd5 Nd5 (36...Nc1?! 37.Ne3 b6 38.Nf5-+) 37.Rc8 Kg7-+) 35...Ne4 36.Kh2 Rf3 37.Ne7 (37.Nf4 Rf4 38.Rd8 Kg7-+) 37...Kh7 38.Nf5 Rh3 (38...Nf2 39.Rf1-+) 39.Kg1 h5 (better 39...Nf6!? 40.b6 ab6 41.Nd6 Ng4 42.Nf7 Rg3 43.Kf1 Rf3 44.Ke1 Ng2 45.Kd2 Rf7 46.Kc3-+) 40.Rd7 (40.gh5 Ra3 41.Nd6 Rg3 42.Kf1 Rf3 43.Kg1 Ne2 44.Kg2 Rf2 45.Kh3 g4 46.Kh4 Nd6 47.Rd6 g3-+) 40...hg4 41.Rf7 (41.Re7 Nd2 42.Nd4 Ra3-+) 41...Kg6 42.Rf8 g3 43.Ne7 Kh5 44.Rh8 Kg4 45.Rh3 Nh3 (45...Kh3 46.Nf5 g2 47.Nd4 g4 48.b6 g3 49.ba7 Nc3 50.a8Q Nce2 51.Ne2 Ne2) 46.Kg2 (46.Kf1 Kf3 47.Ke1 g2 48.Kd1 g1Q 49.Kc2 Qc5 50.Kb2 Qc3 51.Kb1 Nd2 52.Ka2 Qc2 53.Ka3 Qb3) 46...Nf4 47.Kg1 Kf3 Black intends g2 (47...Nd2 48.a5 Nf3 49.Kf1 g2 50.Kf2 g1Q) 48.Nf5 (48.Kf1 g2 49.Kg1 Ne2 50.Kh2 g1Q 51.Kh3 Nf4) 48...Ne2 49.Kf1 g2 50.Ke1 g1Q 0-1. black_bishop_88 (2405) - MrSuccess (2505), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 c5)

5.c3 Nf6=+ 6.Nf3 Be7 7.Be2 0-0 8.0-0 Bd7 9.d3 a6 10.Nbd2 b5 11.bc5 Bc5 12.c4 bc4 13.dc4 Rb8 14.Rb1 (14.Bf6 Qf6 15.cd5 ed5 16.Ba6 Bd6+=) 14...dc4 (14...Qe7 15.Qc1=) 15.Bc4 Qe7 16.Qe2 (16.Bf6 gf6 17.Ba6 Ba3+=) 16...a5 17.a4 ½–½. Diederich,Hauke – Reiss,Rebekka, GER–ch U13 Oberhof, 1998.

5.bc5 Qa5=.

4.d3 a5 5.c3 ab4 6.ab4 Ra1 7.Ba1 c5 8.Nf3 cb4 9.Nbd2 (9.c4=+) 9...Qa5 (9...bc3 10.Bc3 Nc6 11.Qa4-/+) 10.cb4 (better 10.c4=) 10...Bb4?? (better 10...Qb4 11.e4 Nc6=+) 11.Bg7+- f6 (11...Bc3 12.d4+- (12.Bh8?! Bh8 13.d4 Nc6+-)) 12.Bh8 Kf7 (12...Bd7 13.e3+-) 13.e4 (13.d4 Ne7+-) 13...Nc6 14.e5 (14.Qc1 de4 15.de4 Nge7+-) 14...Qc5 (14...d4 15.ef6 Nf6 16.Be2+-) 15.Be2 (better 15.Qb1 d4 16.ef6 Nf6 17.Bf6 Kf6+-) 15...Nd4 (15...Qc3 16.0-0 Ne5 17.Qb1+-) 16.0-0 Nf3 17.Nf3 d4 (17...f5 18.Ng5 Ke8 19.d4+-) 18.Qc1 Bc3 (18...Ba3 19.Qc5 Bc5 20.ef6 Nf6 21.Ng5 Kg6 22.Bf6 Kf6 23.Ne4 Ke7 24.Nc5+-) 19.ef6 b5 (19...Nf6 20.Ng5 Kg6 21.Bf6 Bb4+-) 20.Ng5 Kg6 21.Qf4 Qf5 (21...h5 22.f7 Bb4 23.fg8Q Kh6 24.Qg7) 22.f7 Nh6 23.Qf5 Kf5 24.f8Q Kg5 (24...Nf7 25.Qf7 Kg5 26.Qf6) 25.Qf6 1–0. Janek – anony, internet, 2016.

4.d3 c5 5.bc5 Bc5?? (5...d4 6.Nf3 Bc5 7.e3=) 6.Nf3 (better 6.Bg7 Bd4 7.Bd4 Nf6+-) 6...Bd6?? (better 6...Nf6 7.e3 Nc6=) 7.Bg7+- Qa5 8.Qd2 Nc6 9.Qa5 Na5 10.Bh8 f6 11.e4 Bd7 12.e5 Be7 (12...fe5 13.Be5 Be5 14.Ne5+-) 13.ef6 (13.d4 h5+-) 13...Nf6 14.Be2 (14.d4 0-0-0 15.Bf6 Bf6+-) 14...0-0-0 15.Bf6 Bf6 16.d4 Kb8 (16...Nc6 17.c3+-) 17.Nbd2 Rc8 18.Bd3 a6 (18...Nc6 19.Nb3 e5 20.de5 Ne5 21.Ne5 Be5 22.0-0-0+-) 19.0-0 (19.Bh7!? Ba4+-) 19...Ba4 20.Rfc1 Nc4 (20...Nc6 21.c3 e5 22.de5 Ne5 23.Bh7 Nf3 24.Nf3+-) 21.Nc4 dc4 22.Bh7 (better 22.Be4 h6+-) 22...Rd8 (22...Bc6 23.c3 Rh8 24.Bc2 Bf3 25.gf3+-) 23.c3 Bc6 24.Re1 Bf3 25.gf3 Re8 26.Rab1 Re7 27.Be4 e5 28.Bd5 b5 29.Bc4 (29.de5 Re5 30.Re5 Be5+-) 29...Rg7 (29...ed4 30.Re7 Be7 31.cd4 Ba3 32.Bd3+-) 30.Kf1 ed4 31.cd4 Bd4 32.a4 Bc3 33.Re4 Kc7 34.ab5 ab5 35.Bb5 Kd6 (35...Bf6 36.h4 Kd6 37.Rd1 Kc5 38.Be2+-) 36.Rd1 Kc5 37.Rc4 (better 37.Be2 Kb6 38.Rb1 Kc7+-) 37...Kb5 38.Rc3 Ra7 (38...Kb4 39.Rc8 Kb3+-) 39.Rb1 Ka4 40.Ra1 (40.Rc8 Ra5 41.Rcb8 Rb5 42.R8b5 Ka3 43.Ra5) 40…Kb5 1-0. nemesis_rsu (1605) – Vavilon, Rated Classical game, lichess.org, 2013.

4.e3 Nd7 5.c4 Nb6 (5...Ngf6=) 6.d4 (6.c5 Nd7=) 6...dc4 (6...Nc4!? 7.Bc4 dc4-/+) 7.Qc2 Nf6 8.Bc4 (8.Nd2 Bd6=) 8...Nfd7 (8...Nc4!? 9.Qc4 Qd5 10.Qd5 ed5=+) 9.Nd2 (9.Bd3 a5 10.ba5 Ra5=) 9...Nf6 (9...Nc4 10.Nc4 Qg5 11.f4 Qh4 12.g3=) 10.Ngf3 Bd6 11.0-0 Ke7 (11...Nc4 12.Nc4 Bc7 13.Nce5=) 12.Ba2 (12.Bd3 a5+/–) 12...Nfd5 (12...a5 13.e4 Bf4 14.ba5 Ra5 15.Bc1+/–) 13.Rac1 Qd7 (13...a5 14.b5! cb5 15.e4+/–) 14.Ne4 Bc7 (14...a5 15.Nd6 Qd6 16.b5+/–) 15.Nc5 Qd6 16.g3 1–0. mgriffin (1620) – veerswan, net–chess.com, 2001.

4.e3 f5 5.Nf3 Nf6 6.c4 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

4.Nf3 a5 5.ba5 Qa5 6.e3 Nf6 7.Be2 Bd6 8.Bf6 gf6 9.0-0 Nd7 10.c4 Ne5 (10...dc4 11.Nc3=+) 11.Ne5 (11.cd5 Nf3 12.Bf3 cd5=) 11...Be5 (11...fe5!? 12.Qc2 e4=+) 12.d4+= Bd6 13.c5 Be7 14.Nd2 b5 15.Nf3 Ba6 (15...h6!?+=) 16.a4+/- ba4?? (better 16...b4+/-) 17.Ba6 (better 17.Ra4 Qc7 18.Ba6+-) 17...Ra6 18.Qd3 a3 (18...e5 19.de5 fe5 20.Ne5=) 19.Rfb1 (19.Ra2 0-0+=) 19...0-0= 20.Rb3 Rfa8 21.Ra2 (21.Ne1 a2+=) 21...Qa4 (21...e5 22.Qf5= (22.Rba3?? Qa3 23.Ra3 Ra3-+)) 22.g3 (22.Nd2 Qa5+=) 22...Qc4 23.Kg2 (better 23.Qd1+=) 23...Qd3 24.Rd3 Kf8 25.Ne1 Kg7 26.Nc2 Kf8 27.Rda3 (worse 27.Na3 e5=) 27...Ra3 28.Ra3 Ra3 29.Na3 Ke8 30.Nc2 Kd7 31.f4 (31.g4 e5+=) 31...Bd8 32.Kf3 f5 33.h3 h5 34.g4 hg4 35.hg4 fg4 36.Kg4 f5 37.Kf3 Ba5 38.Na3 Kc7 39.Nc2 Kb7 40.Ke2 Ka6 41.Kd3 (41.Na1 Kb5 42.Nb3 Ka6=) 41...Kb5= 42.Na3 Ka4 43.Nc2 (43.Nb1 Bb4=) 43...Kb3 44.Na1 Kb2 45.Nc2 Ka2 46.Ke2 Kb1 47.Kd3 Kb2 48.e4 (48.Na1 Ka1 49.Kc2-+) 48...fe4 49.Ke3 Kc2 50.f5 ef5 51.Kf4 Kd3 52.Kf5 e3 53.Ke6 e2 54.Kd6 (54.Kf7 e1Q 55.Kg6 Qe6 56.Kh5 Bd2 57.Kh4 Qg6 58.Kh3 Bf4 59.Kh4 Qg3 60.Kh5 Qg5) 54...e1Q 55.Kc6 (55.Kd7 Kd4 56.Kc8 Qe8 57.Kb7 Qd7 58.Ka8 Kc5 59.Kb8 Kb6 60.Ka8 Qe8) 55...Kd4 56.Kd6 (56.Kb7 Qe7 57.Kb8 Qc7 58.Ka8 Bb4 59.c6 Qc8 60.Ka7 Bc5) 56...Qb4 (56...Qe5 57.Kc6 Qc7 58.Kb5 Qc5 59.Ka4 Qb4) 57.Kd7 (57.Ke6 Qb1 58.Ke7 Ke5 59.Kf7 Qh7 60.Ke8 Kf6 61.c6 Qf7) 57...Qc5 (57...Ke5 58.Kc6 d4 59.Kd7 Qb7 60.Ke8 Ke6 61.c6 Qe7) 58.Ke8 Ke5 59.Kd7 (59.Kf7 Qc7 60.Kg6 d4 61.Kg5 Qg7 62.Kh5 Kf4 63.Kh4 Qg4) 59...Qb6 (59...Qc7 60.Ke8 Ke6 61.Kf8 Qf7) 60.Ke8 (60.Ke7 Qf6 61.Ke8 d4 62.Kd7 Qe6) 60...Qc7 (60...Kf6 61.Kd7 Qe6) 61.Kf8 Kf6 (61...Kf6 62.Ke8 Qe7) 0-1. black_bishop_88 (2560) - skiver1 (2540), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 c6)

4.Nf3 Na6 5.e3 Bd6?? (better is 5...Nc7=) 6.Bg7+- Be7 (6...Nc7 7.Bh8 Nf6 8.d4+-) 7.Bh8 Bf6 8.Bf6 Qf6 9.Nc3 c5 (9...Nc7 10.d4+-) 10.bc5 (better is 10.Ba6!? ba6 11.bc5 Ne7+-) 10...Nc5 11.Bb5 Bd7 12.Bd7 Nd7 13.Nb5 0-0-0 (13...Kd8 14.Nc3+-) 14.Na7 Kb8 15.Nb5 Rc8 16.0-0 Qg6 17.c3 Nc5 (17...Ne7 18.Nh4 Qf6 19.Qa4+-) 18.d4 Ne4 (18...Qd3 19.Nd6 Qd1 20.Rfd1 Nb3+-) 19.Qa4 (19.Qa4 Rc4 20.Qa7 Kc8 21.Qa8 Kd7 22.Ne5 Ke7 23.Ng6 hg6 24.Qg8 Nc3 25.Nc3 Rc3 26.Rab1 b6 27.Rb6 Rc5 28.Rb7 Rc7 29.Rc7 Kf6 30.Qf7 Kg5 31.Qf4 Kh5 32.Rh7) 1–0. Fournier,Frederic – alexinhogp, Active, 2008.

4.g3 f5 5.Bg2 Nf6 6.d3 Bd6 7.Nf3 0-0 8.Nbd2 h6 9.0-0 (9.c4 Nbd7=) 9...Nbd7 (9...a5 10.ba5 Qa5 11.c4=) 10.Re1 (10.c4 f4=) 10...g5 (10...e5!?=) 11.e4 f4? (better 11...fe4 12.de4 Bc7+=) 12.e5+- Ne5 (12...g4 13.ed6 (13.ef6?! gf3 14.Bh3 e5+/-) 13...gf3 14.Qf3 (14.Bf3?! fg3 15.hg3 e5+-) 14...fg3 15.Qg3 Kf7 16.c4+-) 13.Ne5 (13.Re5?! g4 14.Ne1 Be5 15.Be5 f3+/-) 13...fg3 14.fg3 Bd7 (14...a5 15.ba5 Qa5 16.d4+-) 15.Nd7 Qd7 16.Nf3 (16.Bh3 Rae8 17.Qe2 g4 18.Bg4 Qd8 19.Be6 Kh7+-) 16...Rae8 17.Ne5 Qc7 18.d4 b6 (18...Be5 19.de5 Nd7 20.c4+-) 19.Qe2 (19.Qd3!? Be5 20.de5 Nh7+-) 19...c5 20.dc5 bc5 21.Rf1 cb4 (21...d4 22.Nc6+-) 22.ab4 (22.Ng6 Ne4 23.Nf8 ba3 24.Ba3 Rf8 25.Bd6 Rf1 26.Rf1 Qd6 27.Be4 de4+-) 22...Bb4 (22...Qb6 23.Kh1 Qb4 24.c4+-) 23.Nd3 (better 23.Ng6!? Nd7 24.Nf8 Nf8+-) 23...Qb6 (23...Bc3 24.Bc3 Qc3 25.Ra6 Qd4 26.Kh1+-) 24.Kh1 Bd6 (24...Be7+-) 25.Bf6 e5 (25...Qc7 26.Qh5 Kh7 27.Bg5+-) 26.Be5 (better 26.Bd5 Rf7 27.Qh5 Ree7 28.Qh6 Qg1 29.Rg1 Re6 30.Qh8) 26...Be5 27.Rf8 (better 27.Bd5 Kg7 28.Rf8 Rf8 29.Qe5 Qf6 30.Ra7 Kh8+-) 27...Rf8 (27...Kf8 28.Ne5 Kg7 29.Ra6 Qb1 30.Bf1+-) 28.Ne5 (better 28.Bd5 Kg7 29.Qe5 Qf6 30.Ra7 Kh8+-) 28...d4 (28...Kg7+-) 29.Bd5 Kg7 30.Nd7 (30.Ng4 Rf7 31.Qe5 Kf8 32.Re1 Qg6 33.Qh8 Qg8 34.Qh6 Qg7 35.Qd6 Kg8 36.Re8 Kh7 37.Be4 Rf5 38.Bf5 Qg6 39.Qg6) 30...Qd6 31.Qe6 (better 31.Qc4 Qd7 32.Qd4 Rf6 33.Ra7 Qa7 34.Qa7 Kf8 35.Qb8 Ke7 36.Qe5 Kd8 37.Qf6 Kd7 38.Qc6 Ke7 39.Qc7 Kf6 40.Qd6 Kg7 41.Qe7 Kh8 42.Qf8 Kh7 43.Be4) 31...Qb4 (31...Qe6 32.Be6 Rf2+-) 32.Nf8 Qc3 (32...Qf8 33.Ra7 Qe7 34.Re7 Kf8 35.Qf6) 33.Qf7 Kh8 34.Qg8 (34.Ng6) 1-0. ribarisah (2125) - somer (2045), Rated Bullet game, lichess.org, 2014.

5.c4 Nf6 6.e3 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

5.e3 Nf6 6.Be2 Be7 7.d3 0-0 8.0-0 Nbd7 9.c4 Re8 10.Nbd2 Bd6 11.c5 Bc7 12.e4 (12.d4!?+=) 12...fe4= 13.de4 Ne4 14.Bd3 (14.Ne4!? de4 15.Nd2=) 14...Nd2-/+ 15.Qd2 Nf6 (better is 15...e5!? 16.Qc3 Qf6-/+) 16.Rae1 Qe7 17.Qc2 Qf7 18.Bf6 (18.Ne5 Qh5+=) 18...Qf6 (better is 18...gf6!? 19.Nd4 e5-/+) 19.Bh7+= Kf8 20.Bg6 Re7 21.Bh5 Bd7 (21...e5 22.Nd2+=) 22.Qh7 Qh6 (22...g5 23.Qd3=) 23.Qh6 gh6 24.Re2 (better is 24.Ne5!? Be8 25.Be8 Ree8 26.f4=) 24...e5+= 25.Rfe1 e4 26.Nd4 (26.Nh4 Rg7 27.f3 ef3 28.Nf3 a5=) 26...Be5 27.Nc2 Kg7 28.f3 Bf5 29.fe4 Be4 30.Bf3 Bf3 31.gf3 Rae8 32.f4 Bf6 33.Re7 Re7 34.Re7 Be7 35.Nd4 Bf6 36.Ne6? Kf7 37.Nc7 Bd8 38.Na6?? ba6-+ 39.Kf2 Bf6 40.Kf3 Bb2 41.a4 Ba3 42.b5 ab5 43.ab5 Bc5 44.bc6 Bd6 45.Ke3 Ke6 46.Kd4 Bf4 47.h4 a5 48.h5 Kd6 49.c7 Kc7 50.Kd5 a4 51.Kc4 a3 52.Kb3 Bd6 53.Ka2 Kd7 54.Kb3 Ke6 55.Ka2 Kf5 56.Kb3 Kg5 57.Ka2 Kh5 58.Kb3 Kg4 59.Ka2 h5 60.Kb3 h4 61.Ka2 h3 62.Kb3 h2 63.Kc4 h1Q 64.Kb5 Qc1 65.Kb6 Qc5 66.Kb7 a2 67.Ka6 a1Q 68.Kb7 Qaa7 (68...Qc7) 0–1. Fournier,Frederic (1980) – Bossner (2230), Echecs21 (1/1), 2003.

4.b5 Nb8 5.Nf3 =.

4.c3 Nf6 5.Nh3 h6 6.f4 e5 7.g3 d4 (7...Bd6!?-/+) 8.fe5 Ne5 9.cd4 Nc4 10.Bc3 Be6 11.d3 (better is 11.Bg2!? Nd5 12.e4 Nc3 13.dc3+=) 11...Ne3-/+ 12.Qd2?? (12.Qc1 Nf1 13.Nf4 Ng3 14.hg3 Bg4+=) 12...Nfg4 (better is 12...Nf1 13.Rf1 Bh3-+) 13.Nf4? (better is 13.Nf2 Nf1 14.Kf1+=) 13...Bf5?? (better is 13...Bd5 14.Rg1 Bb3-+) 14.Ng2 (14.h3 Nf1 15.Rf1+/–) 14...Qd5? (14...Nf1 15.Rf1 Bd7 16.h3=) 15.Rg1?? (better is 15.Ne3 Qh1 16.Nf5+/–) 15...Qe6 16.Ne3 Qe3 (16...Ne3 17.Bg2 Ng2 18.Rg2=) 17.Rg2 (17.Qe3 Ne3 18.Kd2 Nf1 19.Rf1 Be6+=) 17...Qe6 (17...Bd6 18.d5 f6 19.Ra2=) 18.h3 (18.e4 Qe7+/–) 18...Nf6 (18...Ne3 19.g4 Be7-/+ (19...Ng2 20.Bg2 Bg6 21.Bb7+/–)) 19.Qf4 (better is 19.g4!? Bg6 20.e4+=) 19...Bd6-/+ 20.Qh4 (20.Qf3 Bh3 21.Rf2 Bf1 22.Rf1 Nd5+=) 20...Qb3 (better is 20...Bh3 21.Rf2 Bf1 22.Rf1 g5-+) 21.d5 =. Cruncher87@ – IngeImmerfroh22@, mySchach.de, 2005.

4.e3 d4 5.Bb5 (5.b5 Nce7+/-) 5...e5 (5...Qd5!? 6.Bc6 Qc6=) 6.Nf3 Bd7 7.Bc6 bc6? (better 7...Bc6!? 8.Ne5 Bg2+/-) 8.Ne5+- c5 9.bc5 (better 9.ed4 cb4 10.Qe2+-) 9...Qe7? (better 9...de3 10.fe3 Qh4 11.g3 Qe4+-) 10.Nd7 (10.ed4?! f6 11.Nc3 Bc6+/- (11...fe5? 12.Nd5 Qg5 13.Nc7 Ke7 14.Na8 Qg2 15.Rf1+-); worse 10.Bd4 Qe6+-) 10...Qd7 11.Bd4 Rb8 12.Nc3 Nf6 (12...Ne7 13.0-0+-) 13.0-0 (13.Rb1 Rd8+-) 13...Be7 14.Qf3 c6 15.Ne4 Qd5 (15...Ne4 16.Qe4 0-0+-) 16.c3 (better 16.Bf6 Bf6 17.c4+-) 16...Ne4 Increases the pressure on c5 17.Bg7 (better 17.d3!? Nc5 18.Qg3=) 17...Rg8-/+ 18.Bd4 Nd2 (18...Bc5 19.d3 Nd2 20.Qd5 cd5 21.Bc5 Nf1 22.Kf1+-) 19.Qd5 cd5 20.Rfd1 Nb3 (20...Ne4 21.c6=+) 21.Rab1= Kd7 22.g3 (22.Be5 Rb7 23.Rd5 Kc6=) 22...Nc5 (better 22...Kc6!?-/+) 23.Rb8= Rb8 24.Bc5 Bc5 25.Rd5 Kc6 26.Rh5 Ba3 27.Rh7 Rb7 28.Rh6 Kb5 29.h4 (29.Rh4 a5 30.c4 Kc5-/+) 29...Bb2-/+ 30.h5 Bc3 31.g4? (better 31.Rd6-+) 31...a5 32.Rd6 a4 33.g5 (33.Rd3 Kc4 34.Rd8-+) 33...a3 34.Rd3 (34.Rd1 a2 35.Kh2-+) 34...a2 35.Rd1 a1Q (better 35...Kc6 36.Kf1 Rb1-+) 36.Ra1 Ba1 37.g6 (37.Kg2-+) 37...fg6 38.hg6 Rg7 39.f4 Rg6 40.Kf2 Kc4 41.Kf3 Kd3 42.f5 Rg5 43.e4 Rg8 44.Kf4 Rg7 45.e5 Be5! 46.Ke5 Rg5 47.Ke6 Ke4 Attacks the isolani on f5 48.f6 Re5 49.Kd7 Kd4 50.f7 Rf5 51.Ke7 Re5 52.Kd7 Rf5 53.Ke8 Ke5 54.f8Q Rf8 55.Kf8 ½-½. facebook1 (1645) - sossos (1770), Rated Classical game, lichess.org, 2013.

4.e3 Nh6 5.Nf3 a6 (5...f6 6.Nc3=) 6.c4 (6.Be2 Qd6=) 6...dc4 (6...Nf5 7.cd5 ed5 8.Bd3=) 7.Bc4+= b5 8.Be2 Nf5 (8...Bb7 9.0-0+=) 9.d4 (9.0-0 Bb7+=) 9...Bb7 10.0-0 Nb8 (10...Bd6 11.e4 Nh4 12.d5 Nf3 13.Bf3=) 11.Nc3+/– Bf3 (11...Be7 12.Qc2+/–) 12.Bf3 (12.gf3?! c6=) 12...c6 13.Ne4 (13.Be4 Nd6+/–) 13...f6 (13...a5 14.Qd2+/–) 14.Qb3 Bd6?? (better is 14...Kf7+/–) 15.Qe6+- (15.Qe6 Be7 16.Qf5+-) 1–0. Wall,Bill – BobbyX, internet, 2000.

4.Nf3 Be7?? 5.Bg7+- Bf6 6.Bh8 Bh8 7.Nc3 Bc3 (7...d4 8.Na4+-) 8.dc3 Qf6 9.Qd2 a5 (9...Nge7 10.g4+-) 10.b5 Ne5 11.Qd4 Ne7 (11...Nd7+-) 12.Ne5 Nf5 13.Qf4 c5 (13...Ke7 14.e3+-) 14.bc6 bc6 15.e4 Nd6 (15...Qh6 16.Qh6 Nh6+-) 16.Qf6 (16.Qf6 Ra7 17.Nc6 Kd7 18.ed5 ed5 19.Rb1 Kc6 20.Bb5 Kc7 21.Qe7 Kb8 22.Qd6 Ka8 23.Qc6 Kb8 24.Ba6 Bb7 25.Rb7 Rb7 26.Qb7) 1–0. Janek – Frederico, internet, 2018.

4.Nf3 f6 5.d3 e5 (5...a5 6.b5 Na7 7.a4=) 6.Nbd2 (6.e3 Be6=) 6...d4 (6...Be6 7.e3=) 7.c3 (7.e3 de3 8.fe3 Nh6=) 7...dc3 8.Bc3 Be6 (8...Nge7 9.e4=) 9.g3 (9.e3 Qd5=) 9...Bd6 (9...Nge7 10.b5 Nd4 11.Bd4 ed4 12.Nb3=) 10.b5 Nce7 11.d4 Bd5 (11...Nd5 12.Bb2=) 12.e4 (12.de5 Be5 13.Be5 fe5+-) 12...ed4 13.Nd4 Bf7 14.Bc4 (14.Qg4 g6+-) 14...Nh6 (14...Bc4 15.Nc4 Qd7 16.Nd6 Qd6 17.Qb3+-) 15.Bf7+- Nf7 (15...Kf7 16.Qb3 Kg6+-) 16.Ne6+- Qd7 17.Ng7 Kd8 (17...Kf8 18.Bf6 Rg8 19.Be7 Be7 20.Nf5+-) 18.Bf6 Rf8? (18...Be5 19.Be5 Ne5+-) 19.Nc4 (better 19.Qb3 Kc8 20.Ne6+-) 19...Ne5 (19...Kc8 20.e5 Ng8+-) 20.Be5 Be5 (20...Rf7 21.b6 ab6 22.Bd6 cd6 23.Nb6+-) 21.Ne5 Qd1 (21...Qd6 22.f4 Nc8 23.Qg4+-) 22.Rd1 Kc8 23.Ne6 Rg8 24.Rd7 Ng6 25.Rc7 Kb8 26.Nd7 1–0. Janek – tinhho, internet, 2017.

4.g3 Bd7 5.Bg2 Nf6 6.d3 Bd6 7.Nd2 0-0 8.e3 e5 9.c4 dc4 10.Nc4 Be6 (10...b5 11.Nd6 cd6 12.Ne2=) 11.Ne2 Qe7 12.Nd6 cd6 13.0-0 Rfd8 14.Qa4 Bd5 15.e4 Be6 16.Rac1 a6 17.f4 b5 18.Qd1 Rac8 19.f5 Bd7 20.d4 Ng4 21.Qd2 ed4 22.Nd4 Nf6 23.Nc6 Bc6 24.Bf6 Qf6 25.Qf4 Re8 26.Rfe1 Qd4 27.Qe3 Qe3 28.Re3 f6 29.h4 Bb7 30.Rc8 Rc8 31.h5 h6 32.Kh2 Rd8 33.Kh3 d5 34.ed5 Bd5 35.Bd5 Rd5 36.g4 Rd2 37.Re8 Kf7 38.Kh4?? (better is 38.Re3!?=) 38...Rd3 (better is 38...Ke8 39.Kg3 Rd3 40.Kf4 Ra3-+) 39.Rb8 Ra3 40.Rb7 Kg8 41.Rb6 Ra4 42.Rb8 Kf7 (better is 42...Kh7!? 43.Ra8 Rb4 44.Ra6 Rb3-+) 43.Rb7=+ Ke8 44.Rb8 Kd7 45.Rg8 Rb4 46.Rg7 Kd6 47.Rg6 a5?? (47...Ke5!?=+) 48.Rf6= Ke5 49.Ra6 a4 50.f6 Rf4 51.Rb6 Rf6 (better is 51...a3!? 52.Kg3 Rf1= (< 52...Rf6 53.Rb5 Ke4 54.Rb4 Ke5 55.Ra4+/–)) 52.Rb5+/– Ke6 53.Ra5 Rf4 54.Ra6 Ke5 55.Rh6 a3?? (better is 55...Rf6 56.Rh8 Ra6 57.Re8 Kf4+/–) 56.Ra6+- Rf3 57.h6 a2 58.Ra2 Kf6 59.Ra6 Kf7 60.Kg5 Rh3 (60...Rb3+-) 61.Rf6 Kg8 62.Kg6 Kh8 (62...Rh4 63.g5 Rh1+-) 63.Rf8 1–0. baudrey – shakewell, Live Game Caissa's Web, 2004.

5.a4 a6 (5...Nf6 6.Bf6 gf6 7.Nc3+=) 6.e3 Bd7 7.Nf3 f6 8.Nc3 g6 (8...ab5 9.ab5 e5 10.Ra8 Qa8 11.d4=) 9.Be2+= Bg7 10.0-0 f5 11.Rb1 c6? (11...ab5 12.ab5 e5 13.Ra1+=) 12.bc6 (12.ba6 ba6 13.Nd5 Bb2 14.Ne7 Bf6 15.Ng8 Rg8+-) 12...Bc6 (12...Nc6 13.Ba3+=) 13.h4 (13.Nd5 Bb2 14.Ne7 Qe7 15.Rb2 e5+/–) 13...Rb8 (13...Nf6 14.d4=) 14.d4 (14.Nd5!? Bb2 15.Ne7 Ne7 16.Rb2+/–) 14...Nf6 15.Ng5 (better is 15.Ba3=) 15...h6?? (better is 15...Qd6=) 16.Ne6+- Qd7 17.Ng7 Kf7 18.Nf5! Qf5 (18...Qf5 19.Ba3 Combination; 18...Nf5 19.h5 Combination; 18...gf5 19.Ba3 Combination) 19.g4 (19.Ba3 Rhf8+-) 19...Qd7 20.h5?? (20.Ba3 Ba4 21.Na4 Qa4+-) 20...g5? (better is 20...gh5!? 21.f3 Ke8+=) 21.f4 (21.Ba3 Rhf8+-) 21...gf4 22.Rf4 Rhg8 (22...Rbf8 23.Qf1 Kg7 24.Qf3+-) 23.Qf1 Qe6 24.Qg2 (better is 24.e4 Kg7 25.e5+-) 24...Bb5?? (24...Qe3 25.Qf2 Qf2 26.Rf2+-) 25.Kf1 (better is 25.Nb5 ab5 26.Rbf1 Qe3 27.Kh2+-) 25...Be2+/– 26.Ne2 (26.Ke2 Ke8 27.Qf3 Nh7+-) 26...Qe3 (26...Ke8!? 27.e4 Nh5= (worse is 27...Ne4 28.Nc3+/–)) 27.Bc1+/– Qf4?? (better is 27...Qe6+/–) 28.Bf4+- Rg4 (28...Rbc8 29.Qf3 Rc2 30.Rb7 Rg4 31.Rb6 Rf4 32.Qf4+-) 29.Qf3 Rc8 30.Be5 Rc2 (30...Rc6 31.Rb7 Rg5+-) 31.Qf6 Ke8 32.Rb7 Nf5 (32...Rg7 33.Qg7 Rc1 34.Nc1 Nf5 35.Qg8) 33.Qh8 1–0. esko – wthomas, net–chess.com, 2001.

5.Nf3 Nf5=.

5.Nf3 Nf6 6.e3 Ng6 7.c4 Bd6 8.Nc3 dc4 9.Bc4 0-0 10.d4 b6 11.0-0 Bb7 12.a4 a6 13.Be2 ab5 14.Nb5 Qd7 15.Qb3 Ne7 16.Rfc1 Ned5 17.Nd6 cd6 18.e4 Ne4 19.Bd3 Ndf6 20.Be4 Ne4 21.Qc2 Nf6 22.Qc3 Rfc8 23.Qb3 Rc1 24.Rc1 Rc8 25.Qb6 Rc1 26.Bc1 Qc8 27.Bd2 Nd5 28.Qb3 h6 29.g3 Qc6 30.Ne1 Ne7 31.f3 Ng6 32.Nd3 e5 33.de5 Ne5 34.Ne5 de5 35.a5 Qf3 36.Qf3 Bf3 37.a6 Ba8 38.a7 Kf8 39.Kf2 Ke7 40.Ke3 f5 41.Ba5 Ke6 42.Bb6 Kd5 43.Kd3 g5 44.Ke3 f4 45.gf4 gf4 46.Kf2 e4 47.Bc7 f3 48.Bb8 Kd4 49.h4 e3 50.Kf1 Kd3 51.Bc7 e2 52.Ke1 Ke3 53.Bb6 Ke4 54.Bf2 Kd3 55.Bg3 h5 56.Bf2 Ke4 57.Kd2 Kf4 58.Ke1 Kg4 59.Kd2 Kh3 60.Ke3 Kg2 61.Be1 Bd5 62.Bd2 f2 Time forfeit 0-1. GM_HUSARZ (2015) - KarAv (2035), Rated Bullet game, lichess.org 2015.

5.Bg7 Be5?? 6.Bh8 Bh8 7.Nc3 Bd7 8.Nf3 h6 9.b5 Ne5 10.Ne5 Be5 11.d4 Bd6 12.Bd3 f5 (12...Nf6 13.e4 de4 14.Ne4 Ne4 15.Be4 Bb5 16.Bb7+-) 13.Qh5 Kf8 14.g4 Qg5?! (14...Be8 15.Qh3 c5+-) 15.Qg5 hg5 16.gf5 ef5 17.Nd5 Re8 18.c4 c6 19.bc6 bc6 20.c5 Be7 (20...Bb8 21.Nb4 f4 22.Kd2+-) 21.Ne7 Ne7 22.Rb1 a5 23.Rb7 Be6 24.h4 g4 25.h5 Ng8 (25...f4+-) 26.h6 Nf6 27.h7 Re7 (27...Nh7 28.Rhh7 Kg8+-) 28.h8Q Kf7 (28...Ng8 29.Rh7 Rb7 30.Rb7 Bd7 31.Rd7 Ke8 32.Rh7 Kf8 33.Qg7 Ke8 34.Qg8 mate) 29.Rh7! Nh7 (29...Nh7 30.Qh7 Mate attack) 30.Qh7 Kf6 31.Re7 f4 (31...Kg5 32.Rg7 Kf6 33.Qg6 mate) 32.Qg7 1–0. Fournier,Frederic (1800) – Nix (1800), corr AJEC, 2012.

5.Bg7 Be7?? 6.Bh8 Bf6 7.Bf6 Qf6 8.d4 (8.Nc3 Bd7+-) 8...Bd7 (8...e5 9.Bb5+-) 9.Nf3 (9.Qf3 Qe7+-) 9...0-0-0 10.c4 (10.b5 Nce7+-) 10...dc4 11.Bc4 (11.Nbd2 c3 12.Ne4 Qg7+-) 11...e5 12.de5 Ne5 13.Nbd2 Nf3 14.gf3 Bh3 15.Qe2 Bg2?? 16.0-0-0 Bf3?? 17.Nf3 Rd1 18.Rd1 Qa1 19.Kc2 Qa3 20.Nd4 Qb4 21.Bf7 Qc5 22.Kd3 Nf6 23.Be6 Kd8 24.Qf3 Qa3 25.Ke2 Ke7 26.Bg4 Ng4 27.Qg4 Qd6 28.Nf5 (28...Kd8 29.Nd6 cd6 30.Rd6 Ke7 31.Qe6 Kf8 32.Rd8 Kg7 33.Rg8) 1–0. coloplayah (2170) – islanderfan (1735), net–chess.com, 2006.

4.c3 a5 5.e3 (5.Nf3 Nf6=) 5...ab4 (5...e5 6.c4=+) 6.cb4= b5 (6...Nf6 7.Nc3+= (7.Be5=+)) 7.d4 (7.Nc3 c6+=) 7...Nf6 (7...Bd6 8.Nc3 c6 9.Bd3=) 8.Nf3 (8.Nc3 c6=) 8...Ne4 (8...Bd6 9.Nc3 c6 10.Bd3=) 9.Bd3 Nd6 (9...Bd6 10.Nc3 Nc3 11.Bc3=) 10.Nbd2 Be7 11.0-0 Nc4 12.Nc4 dc4 13.Bc2 (13.Be4 Bc6 14.Bc6 Nc6=) 13…0-0= ½–½. Fournier,Frederic – Lucas,Bernard, Partie amicale Senlis, 1993.

4.c3 Bd6 5.c4 Nf6 6.cd5 ed5 7.Nf3 =+.

4.e3 Ba4 5.Be2 d4 6.Bd4 Qd5? (6...Ne7 7.Nf3+/–) 7.Nf3 (better is 7.Bf3 Qg5 8.Nh3+-) 7...Qe4?? (7...Qf5 8.g4 Qg6 9.Ne5+-) 8.d3 (better is 8.Nc3!? Qc2 9.Bb5 c6 10.Ba4 Qd1 11.Rd1 Nf6+-) 8...Qg4? (8...Qf5 9.Nc3 Bd7 10.Ne5+-) 9.0-0 (9.Ne5!? Qg5 10.Bh5 Nh6+-) 9...Bd6 10.Be5 (better is 10.Nc3 Bd7 11.Ne4+-) 10...Qh5?? (better is 10...Qg6+-) 11.Bg7 Bc6 12.Nbd2 (12.e4 Nd7+-) 12...Nh6?? (better is 12...Bh2 13.Nh2 Qg5+/–) 13.Bh8 Ng4 (13...Qg6 14.Nc4+-) 14.h3 Nh6 15.Bb2 Nd7 (15...Qg6 16.Nc4+-) 16.Ne5! Ne5 (16...Qe5 17.Be5) 17.Bh5 0-0-0 18.d4 Nd7 19.c4 Rg8 20.e4 (20.d5 ed5 21.b5 Bb5 22.cb5 Nb6+-) 20...b5 21.e5 (better is 21.d5 Bb7+-) 21...Rg2 22.Kh1 Rf2 23.Kg1 (better is 23.d5 Ne5 24.Rf2+-) 23...Rg2= 24.Kh1 Rd2?? (24...Rf2 25.d5 Rf1 26.Nf1+-) 25.Kg1 (better is 25.d5 Bd5 26.cd5 Rd1 27.Rad1 Be5 28.Be5 Ne5 29.Bf7 Nhf7 30.de6+-) 25...Rg2= 26.Kh1 Rb2?? (27.Bf3 Bf3 28.Qf3 Be7 29.Qa8 Nb8 30.cb5 Nf5+-; 26...Rd2 27.d5 Rd1 28.Rad1 Bb7 29.ed6 bc4+-) +-. Anden – 4050, Live Game Caissa's Web, 2004.

4.e3 b5 5.Nf3 Nf6 (5...a5 6.Ne5=) 6.d3 (6.Be5 a5 7.Nc3 c6=) 6...Nc6 (6...a5 7.ba5 Ra5 8.c4=) 7.c4 bc4 (7...a5 8.cb5 Na7 9.Be2=) 8.dc4+= dc4 (8...Rb8 9.Nbd2+=) 9.Bc4 Bd6 (9...a5 10.b5 Na7 11.Qd3+=) 10.0-0+/– 0-0 11.Nc3 (11.Qc2 Qe7+=) 11...a6 (11...Qe7 12.Qc2+=) 12.Ne2 (12.Qd3 Bc8+/–) 12...Ng4+= 13.Ng3 (13.Qc2 a5 14.b5 Nce5 15.Ne5 Ne5 16.Be5 Be5+=) 13...Nce5 14.Be2 Bc6 (14...Bb5 15.Ne5 Ne5 16.f4+=) 15.Rc1 (15.Ne5 Be5 16.Be5 Ne5+/–) 15...Bf3 16.Bf3 (16.gf3 Nf6+=) 16...Nf3 (16...Qh4!? 17.h3 Ne3 18.fe3 Nf3 19.Qf3 Qg3 20.Qg3 Bg3+=) 17.Qf3+= Ne5 (17...Qh4 18.h3 Ne5 19.Be5 Be5 20.Rc5=) 18.Qe4 Ng6 19.Nh5 e5 20.f4 Qh4 21.Ng3 ef4 (21...Rfe8!?+=) 22.Nf5+- Rfe8 (22...Rae8 23.Qc2 Qg5 24.Bg7 fe3 25.Bf8 Bf8 26.Rf3+-) 23.Qe8! (23.Nh4 Re4 24.Nf5 fe3-/+) 23...Re8 24.Nh4 Nh4 25.ef4 Re2 26.Rf2 Rf2 27.Kf2 Bf4 28.Re1 h6? (28...Kf8 29.g3 Bg5+-) 29.g3 Bd2 (29...Ng6 30.gf4 Nf4 31.Re8 Kh7 32.Ke3 Nd5 33.Kd4+-) 30.Re8 (30.gh4?! Be1 31.Ke1 f6+-) 30...Kh7 31.gh4 Bf4 32.Be5 (32.Ra8 Kg6+-) 32...Bc1 33.Re7 1–0. diggitus (2175) – dirtyrat (2135), net–chess.com, 2008.

4.e3 Bd6?? 5.Nf3 (better is 5.Bg7 Be5 6.Be5+-) 5...Nf6= 6.d4 0-0 7.Bd3 c6 8.0-0 Qb6 9.Nbd2 Bb4?? (better is 9...a5 10.c4 Qd8+=) 10.ab4+- Qb4 (10...Rd8 11.Bc3 a6 12.Ne5+-) 11.Qc1 (better is 11.Ba3 Qb6 12.Bf8 Kf8+-) 11...Qb6 12.Ba3 Na6 (12...Re8+-) 13.Bf8 Rf8 14.Ba6 Qa6 (14...ba6 15.Qa3 Qc7+-) 15.Ra6 ba6 16.c4 1–0. Fournier,Frederic (1960) – barco2007 (1735), Active Blind, 2007.

4.e3 f6 5.c4 Nc6 (5...c6!?=) 6.cd5+/– ed5 7.Qh5 g6 8.Qd5 Bd6 (8...Qe7 9.Qb3+/–) 9.b5+- Na5 10.Bc3 (10.Bc3 Ne7 11.Qf3+-) 1–0. Wall,Bill – Thinker, internet, 1999.

4.e3 Nf6 5.c4 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 Bd7).

4.Nf3 c5 5.c3 (5.bc5 Qa5+=) 5...c4 6.Ne5 Nc6 7.Nd7 Qd7 8.g3 b5 9.Bg2 Nf6 10.0-0 Bd6 11.d3 0-0 12.Nd2 cd3 13.ed3 Ne5 14.Nf3 Nf3 15.Qf3 Rab8 (15...e5 16.Rfc1=) 16.Ra2 (16.c4 Be7 17.Rac1 Rfd8+=) 16...a6 (16...Rfc8 17.Rfa1=) 17.Ba1 (17.c4 Be7+=) 17...Be7 18.Re1 Qd6 (18...a5 19.Rae2=) 19.Rae2 (19.c4 dc4 20.dc4 bc4+/–) 19...Rfe8 (19...Ra8 20.Qe3=) 20.Qe3 (20.c4!? Qc6 21.Be5+=) 20...Ng4 21.Qf4 Qf4 22.gf4 f5? (better is 22...Bd6 23.h3 Nf6=) 23.Re6+- Kf7 (23...Kf8 24.Bd5 Bf6 25.Re8 Re8 26.Re8 Ke8 27.Be6+-) 24.Ra6 (better is 24.Bd5!? Kf8+-) 24...Bh4 25.Bd5 Kf8 26.Re8 Re8 27.Re6 Bf2 28.Kg2 Rd8 29.Bf3 Bh4 30.Bg4 (better is 30.Bc6!? Rd3 31.Bb5 Rd2 32.Re2 Re2 33.Be2 Ne3 34.Kh3 Bf6+-) 30...fg4 31.d4 Kf7 32.Re5 Rb8 (32...Re8 33.Kf1+- (33.Rb5?! Re2 34.Kf1 Re1 35.Kg2 Ra1=)) 33.h3 (33.Rh5!? Bf6+-) 33...gh3 34.Kh3 Bf6 35.Rc5 Be7 (better is 35...Re8!? 36.Rb5 Re1+/–) 36.Rc7+- Ra8 (36...Ke6 37.c4 Kd6 38.Rc5 bc4 39.Kg4+-) 37.Bb2 Ra6 38.d5 (38.c4 bc4 39.Kg4 Rg6 40.Kf3 Rg1+-) 38...Ke8? (38...Rd6 39.c4 bc4 40.Bg7 Rd5 41.Be5 Rd3 42.Kg4 Ra3 43.f5+-) 39.Rc6 (better is 39.Rb7 Rh6 40.Kg2 Rg6 41.Kf3+-) 39...Rc6+/– 40.dc6 Bf6 41.Kg4 (better is 41.a4!? ba4 42.b5+-) 41...Kd8+= 42.Kf5 Kc7 43.Ke6 (better is 43.a4 ba4 44.b5+/–) 43...Kc6+= 44.f5 (better is 44.Kf5!?+=) 44...h5-+ 45.Kf7 (better is 45.Bc1 h4 46.c4 bc4 47.a4-+) 45...h4 46.Bc1 h3 47.Bf4 Kd5 48.Kg6?? (48.Bh2-+) 48...Be5 49.Bh2 (49.Be5 Ke5 50.Kg7 Kf5 51.Kf7-+) 49...Bh2 50.Kg7 Be5 0–1. Chairboy – Tricky Rabbitt, ChessWorld.net, 2005.

4.Nf3 Nf6 5.e3 =.

4.b5 Ngf6=+ 5.e3 g6 (5...Bd6 6.Nf3=+) 6.Nf3= Bg7 7.Be2 b6 8.d3 0-0 9.0-0 Bb7 10.Nbd2 Rc8 11.c4 c5 12.Qc2 Qc7 13.a4 Ne8 (13...dc4 14.Nc4 Ng4 15.g3=) 14.Bg7 Ng7 15.Rac1 (15.a5 e5+-) 15...Ne5 16.cd5 ed5 17.Qb2 Nf3 18.Nf3 (worse 18.gf3 Qe7=+) 18...Ne6 19.Nd4?? (better 19.d4+=) 19...Qe5-+ 20.Qa1 (20.a5 cd4 (20...Nd4?! 21.ed4 Qd4 22.Qd4 cd4 23.a6=+) 21.a6 Rc1 22.Rc1 Bc8-+) 20...cd4 (20...Nd4?! 21.Bd1-/+) 21.ed4 (21.Bg4 f5 22.Bf3 Ng5-+) 21...Nd4 (better 21...Qe2 22.Rfe1 Qd3 23.Rcd1-+) 22.Bd1 Qf4 23.Rc8 Rc8 24.g3 Qe5 25.Bg4 f5 (25...Re8 26.Qd1-+) 26.Re1 Qg7 27.Bd1 h6 (27...a6 28.ba6 Ba6 29.Qa2-+) 28.Qa3 (28.f4 Rc3!-+) 28...Rc5 29.a5 (29.Qb4 Qf6-+) 29...Nb5 (29...Rb5?! 30.Re8 Kh7 31.Re7=) 30.Qa4 Bc6 31.ab6 ab6 32.Qf4 Kh7 33.Bf3 Nd4 34.Be2 (34.Bg2 Bb5-+) 34...Rc2 (better 34...Bb5-+) 35.Qb8 (35.Bd1 Rc3 36.Qd6 Rd3 37.Bh5 gh5 38.Re7-+) 35...Re2 (35...Ne2 36.Kf1 Bb5 37.Kg2-+) 36.Rc1 (36.Re2 Ne2 37.Kf1 Nd4-+) 36...Rc2 (better 36...Nf3 37.Kg2 Qd4-+) 37.Ra1 (37.Rc2 Nc2 38.Qb6 Qa1 39.Kg2 Ne1 40.Kf1 Nd3 41.Ke2 Ne5-+) 37...Rc1! 38.Rc1 Ne2 39.Kh1 Nc1 40.Qb6 0–1. Satka,Martin – Schultchen,Hermann (1690), 7sen.LSEM Brandenburg, 1999.

4.Nf3 a6 5.e3 b5 6.Be2 Bb7 7.d3 Ngf6 8.0-0 Be7 9.Nbd2 0-0 10.c4 dc4 11.dc4 c5 12.bc5 Bc5 (12...bc4!? 13.Qc2 Rc8=) 13.cb5+/– ab5 14.Bb5 Ba6 15.Ba6 Ra6 16.Qe2 Qa8 17.Nc4 Rb8 18.Rfb1 Nb6 (18...Ra4 19.Nfe5+/–) 19.Bd4 (19.Bf6 gf6 20.Nb6 Rab6 21.Rb6 Rb6+/–) 19...Bd4 20.Nd4 Ne4 21.Qd3 Nc4 22.Rb8 (22.Qc4?! Rb1 23.Rb1 Ra3=) 22...Qb8 23.Qc4 (worse is 23.Qe4 Ra3 24.Rb1 Nb6=) 23...Rb6 24.Rc1 h6? (24...Nd6 25.Qc5 Rb1 26.h3+/–) 25.h3?? (better is 25.Nc6 Nd6 26.Qc5+- (26.Nb8?! Nc4 27.Nd7 Rd6+/–)) 25...Nd6 26.Qc3 Ne4 27.Qc2 Nf6 28.a4 g5 29.a5 Rb2 30.Qc8 Qc8 31.Rc8 Kg7 32.Rc7 g4? 33.Ne6 Kg6 34.Nc5 gh3 35.gh3 Rb1 36.Kg2 Rc1 37.a6 Ne4 38.a7 Nc5 39.a8Q (39.a8Q Rc2 40.Qe8 Rf2 41.Kf2 Ne4 42.Qe4 Kf6 43.Qf4 Ke6 44.Rc6 Kd5 45.Rb6 f5 46.Qd4) 1–0. Fournier,Frederic (2000) – joaqin (1860), Active, 2004.

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

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

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

5.d4 Be7 6.e3 0-0 7.c4 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 Nbd7).

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

4.Nf3 Nf6 5.e3 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3).

4.g3 Nf6 5.Bg2 Bd6 6.e3 c6 7.Ne2 a6 8.d3 Nbd7 9.Nd2 Qe7 10.c4 0-0 11.c5 Bc7 12.0-0 g6 (12...e5 13.Qc2=) 13.e4 fe4 14.de4 de4 15.Ne4 Ne4 16.Be4 e5 17.Qb3 Kg7 18.f4 Re8 19.g4 (19.Rae1 Nf6 20.Bg2 Be6+/–) 19...Qe6 (better is 19...Nf6 20.Ng3 Bg4 21.fe5 A) 21...Ne4 22.e6 (22.Ne4?! Be6 23.Qg3 Rf8+=) 22...Kg8 23.Ne4 Be6 24.Qc3+-; B) 21...Be5=+) 20.f5?? (better is 20.Qe6 Re6 21.g5+/–) 20...Qb3-+ 21.f6 (21.Bc3 Nf6 22.Bd3 gf5 23.Bf5 Ng4 24.Rab1 Qa3 25.Bc8 Rac8 26.Rf4-+) 21...Nf6 22.Bc1 Ne4 (23.Rb1 Qd3-+) 0–1. audrey – CJC1934, Live Game Caissa's Web, 2004.

4.g4 Nf6 5.g5= Ne4 6.h4 h6 7.d3 Nd6 8.Bg2 (8.gh6!? Rh6 9.Nf3=) 8...hg5-/+ 9.hg5 Rh1 10.Bh1 Qg5 11.Nf3 Qg4 12.Nbd2?? (better 12.e3-/+) 12...Qh3-+ 13.Nf1 Qh1 14.Qd2 Qh6 15.e3 Nd7 16.0-0-0 b6 17.Kb1 (17.Ng3 a5-+) 17...a5 18.Nd4 (18.Ng3 ab4 19.ab4 c5-+) 18...ab4 19.ab4 c5 20.Nc6 Bb7 21.Ne5 Ne5 22.Be5 Nf7 23.Bb2 e5 Black prepares f4. Black intends d4 24.Ng3 Qe6 25.e4 (25.d4 cd4 26.ed4 e4-+) 25...f4 (25...de4 26.de4 g6 27.f4-+) 26.Nf5 (26.ed5 Qd5 27.Ne4 cb4-+) 26...d4 (better 26...de4 27.de4 g6 28.Qd3 gf5 29.ef5 Qa2 30.Kc1-+) 27.c4 (27.Rg1 Qf6 28.Rh1 c4-+) 27...dc3 28.Qc3 (28.Ng7 Bg7 29.Qc3 Bf8-+) 28...cb4 (better 28...Qa2 29.Kc1 cb4 30.Ng7 Kd7 31.Qc4-+) 29.Qc7 (29.Ng7 Bg7 30.Qb4 Bf8 31.Qb5 Bc6 32.Qb6 Qa2 33.Kc1 Rc8-+) 29...Qa2 30.Kc2 Rc8 (better 30...b3 31.Kc1 Rc8 32.Ng7 Bg7 33.Qc8 Bc8 34.Rh1-+) 31.Qc8 Bc8 32.Ra1 Qe6 33.Ra8 Qc6 34.Kd2 Qa8 35.Be5 Bf5 (35...Ne5 36.Ng7 Bg7 37.Kc2 Qa2 38.Kd1 Bg4 39.f3 Bf3 40.Ke1 Qe2) 36.Bg7 Bg7 37.ef5 (37.Ke2 Bg4 38.f3 Qa2 39.Ke1 Bc3 40.Kf1 Bh3 41.Kg1 Qg2) 37...Qf3 (37...Qa2 38.Ke1 f3 39.Kd1 Qb1 40.Kd2 Bh6) 38.f6 Bf6 (38...Qf2 39.Kc1 b3 40.Kd1 b2 41.fg7 b1Q) 39.Kc1 (39.Kc2 Qf2 40.Kb3 Qb2 41.Kc4 Nd6 42.Kd5 Qd4 43.Ke6 Qe5) 39...Qf2 40.d4 b3 41.Kb1 (41.Kd1 b2 42.d5 b1Q) 41...Qb2! 42.Kb2 Bd4 (42...f3 43.Ka3 f2 44.Kb3 f1Q 45.Kc3 Qe2 46.Kb3 Qd3 47.Kb2 Qd2 48.Kb3 b5 49.Ka3 Qd4 50.Kb3 Qb2) 43.Kb3 Bc5 44.Kc4 f3 45.Kb5 f2 46.Kc6 (46.Ka6 f1Q 47.Kb7 Nd6 48.Kb8 Qf3 49.Kc7 Qb7) 46...f1Q 47.Kb7 Qe1 (47...Nd6 48.Kb8 Qf3 49.Kc7 Qb7) 48.Ka6 (48.Kb8 Qe4 49.Kc7 Nd6 50.Kb8 Qb7) 48...Qb4 (48...Nd6 49.Ka7 Qe7 50.Ka6 Qb7) 49.Kb7 Bd4 (49...Nd6 50.Kc7 Qe4 51.Kb8 Qb7) 50.Kb8 (50.Kc6 Qc4 51.Kb7 Nd6 52.Kb8 Qc8 53.Ka7 b5) 50...Bc3 (50...Be5 51.Kc8 Qc5 52.Kb7 Nd8 53.Ka6 Qa5) 51.Kb7 Bd2 (51...Nd8 52.Ka7 Be5 53.Ka6 Qa5) 52.Kb8 (52.Kc6 Qc5 53.Kb7 Nd6 54.Kb8 Qc8 55.Ka7 Qb7) 52...b5 (52...Bf4 53.Kc8 Qc5 54.Kb7 Nd8 55.Ka6 Qa5) 53.Kb7 Qc3 54.Kb8 b4 55.Kb7 b3 (55...Nd6 56.Kb6 Be3 57.Ka5 Qa3) 56.Kb8 b2 57.Kb7 (57.Ka7 b1Q 58.Ka6 Qa5) 57...b1Q 58.Ka7 (58.Ka6 Qa5) 58…Qca1 (58...Qa5) 0-1. black_bishop_88 (2500) - dk1210 (2370), lichess.org, 2020. (=1.a3 d5 2.b4 e6 3.Bb2 f5)

4.g4 fg4-/+ 5.h3 e5 (better 5...g3!? 6.fg3 Bd6-/+) 6.hg4 Nc6 7.Nf3 e4 8.b5 ef3 (worse 8...Bg4 9.Nh2 (worse 9.bc6 ef3 10.ef3 Qe7 11.Qe2 Bc8=+) 9...Be6 10.bc6 bc6 11.d3+/-) 9.bc6 bc6 (9...Bg4!? 10.ef3 Qe7 11.Qe2 Bc8 12.cb7 Qe2 13.Be2 Bb7=+) 10.ef3= Bc5?? (10...Qe7 11.Qe2=) 11.Qe2 (better 11.Bg7 Nf6 12.Bh8+-) 11...Kf7= 12.Kd1 Nf6 13.g5 Re8 (13...Nd7!? 14.f4 Rb8=) 14.Qd3 g6?? (better 14...Bf2 15.Be2 Rb8 16.Bf6 gf6 17.Rh7 Ke6+=) 15.Bf6+- (15.gf6?! Rh8+-) 15...Qd6 (15...Bf5 16.Bd8 Bd3 17.Bd3 Rad8 18.Rh7 Kg8 19.Bg6 Re6+-) 16.Rh7 Ke6 (16...Kf8 17.Qg6 Re1 18.Ke1 Qe5 19.Be5 Bf2 20.Kf2 Be6 21.Qg7 Ke8 22.Qe7) 17.Bh3 1-0. black_bishop_88 (2520) - oztechnique (2370), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 f5)

4.h3 Nf6 5.g4 (5.Nf3 a5=) 5...Bd6 (5...fg4 6.hg4 Ng4 7.e4=+) 6.g5 Ne4 7.h4 (7.Bg7? Nf2 8.Kf2 Qg5-+) 7...0-0 (better 7...Ng3!? 8.Bg7 Rg8=) 8.d3+/- c5 9.de4 fe4 10.e3 (10.g6 h6 11.bc5 Bc5+/-) 10...Nd7 (10...cb4 11.ab4 Bb4 12.c3+=) 11.Bh3 Ne5 (11...Qe7 12.b5+/-) 12.Be5 (12.bc5 Qa5 13.Bc3 Qc5+/-) 12...Be5 13.Ra2 d4 (13...Qd6!? 14.c3 b5+/-) 14.c3+/- (14.bc5 de3 15.f4 ef3 16.Qd8 f2 (16...Rd8? 17.Nf3 Bg3 18.Ke2+-) 17.Ke2 fg1N (17...Rd8?! 18.Nf3 Bf4 19.Rb2=+) 18.Rg1 Rd8-/+) 14...d3 15.f4 (better 15.Qb3 cb4 16.Be6 Kh8 17.ab4+- (17.cb4 Be6 18.Qe6 Rc8=+)) 15...ef3=+ 16.Nf3 Rf3?? (better 16...Bg3 17.Kd2 Qd5=) 17.Qf3+- d2 (17...cb4 18.ab4 Bd6+-) 18.Rd2 Qc7 (18...Qe7 19.0-0 g6 20.Rdf2+-) 19.Rf1 Bd6 1-0. black_bishop_88 (2460) - angrybishppppp (2365), lichess.org, 2020. (=1.a3 e6 2.b4 d5 3.Bb2 f5)

5.c4 c6 (5...dc4 6.dc4 Qd1 7.Kd1+=) 6.Nd2= Be7 7.Ngf3 0-0 8.g3 (8.e3 a5 9.Bc3 ab4 10.ab4 Ra1 11.Qa1 dc4 12.dc4 c5=) 8...Nbd7 (8...a5 9.b5+=) 9.Ng5 Nb8 10.Nb3 f4 (10...Ng4!? 11.Nf3 Bf6 12.Bf6 Qf6=) 11.Nd4 Qd6? (11...fg3 12.hg3 dc4 13.dc4+/–) 12.Bh3 (12.c5 Qd7 13.Nde6 Re8+-) 12...e5? (better is 12...dc4 13.Be6 Be6 14.Nge6 Qd5+/–) 13.c5+- Qc7 14.Nde6 Be6 15.Be6 (better is 15.Ne6!? Qc8+-) 15...Kh8 16.Nf7 Rf7 17.Bf7 Nbd7 18.Be6 Nf8 19.Bh3 Ng6 (19...b6 20.gf4 ef4 21.cb6 ab6 22.Rc1+/–) 20.Qd2 d4 (20...b6 21.cb6 ab6 22.Bf5+-) 21.Bf5 Nd5 22.Bg6 hg6 Black gets the initiative 23.gf4 Nf4 24.e3 de3 25.fe3 Bh4 26.Kd1 Nd3 27.Kc2 (27.Qd3 Decoy theme: d3 27...Rd8 A pinning theme) 27...Rd8 28.Qg2 Qf7 29.Rhf1?? (better is 29.Bc3+/–) 29...Qc4-/+ 30.Bc3 (30.Kb1 Ne1 31.Re1 Be1-/+) ½–½. Bui Dac Khuong – Dinh Giang Nam, VIE–ch U15 Vung Tau, 2004.

5.Nd2 Bd6 6.g3 c6 7.Bg2 0-0 8.Ngf3 Nbd7 9.0-0 Ng4 10.h3 (10.c4 f4=) 10...Nge5 (10...Ngf6 11.Nd4 Nb8 12.c4=) 11.Nd4 (11.Ne5 Ne5 12.f4 Qb6 13.d4 Nf7=) 11...Qf6 (11...Nf6 12.c4=) 12.f4 Ng6 (12...Nf7 13.c4=) 13.c4+= e5 (13...Qf7 14.Qc2+=) 14.Nf5 Qf5 15.g4 (15.fe5 Qg5 16.ed6 Qg3 17.Rf8 Ndf8+=) 15...Qf6 (15...Qf4 16.Rf4 Nf4 17.e4 Nd3 18.Qb3 Nb2 19.ed5+-) 16.fe5+- Qh4 (16...Qe6!? 17.ed6 Nf4+-) 17.ed6+- Nf4 (17...Qg3 18.Rf8 Ndf8 19.Qe1 (19.cd5?! Nf4 20.Qf1 Nh3 21.Kh1 Nf2 22.Kg1 Nh3 23.Kh1 Nf2 24.Kg1 Nh3=) 19...Qd6 20.cd5 cd5 21.Qf2+-) 18.Rf4! Rf4 19.cd5 cd5 20.Bd5 Kh8 21.Bg2 Nf6? (better 21...Qf2 22.Kh1 Qh4+-) 22.Qe1 Qg5 (22...Qe1 23.Re1 Ne8+-) 23.e3 Rg4 24.hg4 Qg4 (24...Bg4 25.Qf2 Rd8 26.Rf1+-) 25.Qf2 Nh5 (25...Bf5+-) 26.Qf8 1–0. Janek – tinhho, internet, 2017.

5.Nd2 Be7 6.g3 0-0 7.Bg2 c5 8.bc5 Bc5 9.Nh3 (9.e3 Bd7=) 9...Nc6=+ 10.c4 d4 11.Nb3 Qd6 12.0-0 Bd7 (12...e5 13.Nc5 Qc5 14.a4=) 13.Nc5 Qc5 14.a4 e5? (better 14...Rfc8!?=) 15.Ba3+- Nb4 (15...Qa5 16.Bf8 Rf8 17.Qb3+-) 16.a5+- (16.Bb7?! Rab8 17.Bg2 Bc6=) 16...Rab8? (better 16...b6 17.ab6 f4+-) 17.Qb3 e4 (17...Qc7 18.Bb4 Rfe8+-) 18.Bb4 Qe5 19.Qa3 (better 19.Bf8 Kf8 20.e3+-) 19...Rfe8 (19...Bc6 20.Bd6 Qe6+-) 20.Bd6 Qe6 21.Ng5 (21.Ng5 Qd6 22.Qd6+-) 1–0. Karl – Tymcr, internet private, 2018.

4.e3 (--> 3.e3 f5 4.a3).

4.e3 Nf6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5).

4.e3 Nf6 5.Nf3 (--> 1.b4 f5 2.Bb2 Nf6 3.Nf3 e6 4.a3 d5 5.e3).

5.g3 Nc6 6.Nf3 Be7 7.Bg2 0-0 8.0-0 Ne4 9.d3 Nf6 10.Nbd2 (10.e3 b5+=) 10...a6 (10...Ng4 11.Qc1+=) 11.e4 (11.e3 b5+=) 11...de4 12.de4 fe4 (12...Ne4 13.Ne4 Qd1 14.Rad1 fe4 15.Ne5 Ne5 16.Be5+=) 13.Ne5+= Ne5 14.Be5 (14.fe5 Nd5 15.Be4 a5+=) 14...c6 (14...c5!?=) 15.Ne4+= Ne4 16.Be4 Bf6 17.Qd3 Be5? (17...Qd3 18.Bd3 a5 19.Rad1+/–) 18.fe5 (18.Bh7 Kh8 19.fe5 Rf1 20.Rf1 Qd3 21.Bd3+- (worse is 21.cd3 Kh7 22.Rf8 b6-/+)) 18...Rf1+/– 19.Rf1 (19.Qf1?? Qd4 20.Kg2 Qe4 21.Qf3 Qe5-+) 19...g6?? (19...Qd3 20.Bd3 Bd7 21.Rd1+/–) 20.Rf6 (20.Qd8 Kg7 21.Qf8) 20...Qe8 21.h4 b5?? 22.h5! Bb7 23.hg6 Rd8 24.Qf3 h6 25.Rf7 Rd2 26.Qf6 Rd1 27.Kf2 Rd2 28.Ke3 Rd7 29.Qg7 1–0. Fournier,Frederic (1800) – papymat, Active (5/0), 2005.

5.h3 Bd6 (better 5...Nh5 6.Nf3 Nf4-/+) 6.g4? (6.e3 0-0=+) 6...c6?? (better 6...Bf4 7.Bg2 Bg3 8.Kf1 fg4-+) 7.e3= 0-0 8.g5 Ne4 9.Nf3 (9.Ne2 Bc7=) 9...Nd7 (9...a5 10.ba5 Qa5 11.g6=+) 10.h4 (10.Rg1 Be7=) 10...Ng3 11.Rh3 Nf1 12.Kf1 Qb6 13.h5 Qc7 14.h6 g6 15.Bg7 Rf7 16.d4 Bf8 (16...a5 17.ba5 Qa5 18.Kg2=+) 17.Nbd2 Bg7 18.hg7 Rg7 19.c4 Nf8 20.Rc1 Qe7 21.Ne5 White prepares c5 21...Nd7 22.Ndf3 Ne5 23.Ne5 Bd7 24.Kf2 a5 25.c5 ab4 26.ab4 Ra2 27.Rc2 Rc2 28.Qc2 Qd8 (28...b5 29.Qa2 Qe8 30.Qa6+=) 29.Qa4+= Qc7 30.Qa7 Bc8 31.Kg3 b5 (31...Bd7 32.Qa8 Bc8 33.Qa5+=) 32.Qa8 (32.cb6 Qa7 33.ba7 Ra7 34.Nc6 Rc7+=) 32...Qb7 33.Qa5 (33.Qb7 Bb7 (33...Rb7? 34.Nc6 Rc7 35.Ne5+-) 34.Rh2 Rc7+/-) 33...Qa7?? (better 33...Rc7+=) 34.Qd8 1-0. black_bishop_88 (2725) - luissabatini (1805), Daily SuperBlitz Arena, lichess.org, 2020. (=1.a3 d5 2.b4 e6 3.Bb2)

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5).

4.d4 a6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.d4).

4.d4 Bd6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Bd6 5.d4).

4.d4 Be7 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.d4).

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

4.e3 a6 5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 a6).

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

5.b5 b6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6).

5.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5).

5.bc5 Bc5 6.d4 Bd6 7.Nf3 0-0 8.c4 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6 8.c4 0-0).

5.bc5 Bc5 6.Nf3 Nc6 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.c4 Nc6).

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

5.Nf3 Bd6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 0-0 6.c4 c6).

5.f4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.f4 e6 5.a3).

5.c4 0-0 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 0-0).

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

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

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

5.c4 dc4 6.Bc4 0-0 7.d4 b6 8.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.d4 b6 7.c4 dc4 8.Bc4).

5.c4 dc4 6.Bc4 0-0 7.d4 c6 8.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 dc4 8.Bc4).

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

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

5.d4 0-0 6.Nd2 c6 7.c4 Nbd7 8.Ngf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 Nbd7 8.Nbd2).

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

5.Nf3 0-0 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3).

5.Nf3 0-0 6.d4 c6 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4).

5.Nf3 h6 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.Be2 h6).

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

4.Nf3 a5 5.b5 c5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.Nf3).

4.Nf3 a6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

4.Nf3 b6 5.g3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 e6 4.g3 Nf6 5.a3 d5).

4.Nf3 c5 5.b5 Bd6 6.e3 0-0 7.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4 Nbd7).

4.Nf3 c5 5.bc5 Bc5 6.d4 Bd6 7.e3 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6).

4.Nf3 c5 5.bc5 Bc5 6.e3 0-0 7.Be2 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0-0).

4.Nf3 Bd6 5.e3 0-0 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 0-0).

4.Nf3 Nbd7 5.e3 Be7 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 Nbd7).

4.Nf3 g6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 g6 5.Nf3).

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

5.e3 0-0 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3).

5.e3 b6 6.c4 c6 7.d4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 b6).

5.e3 c6 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.Be2 c6).

5.g3 0-0 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.g3).

5.g3 0-0 6.Bg2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.g3 Be7 5.Bg2 0-0 6.Nf3).

4.e3 Qe7 5.b5 Qb4 6.Ba3 Qa5 7.Bf8 Kf8 8.g3 Nf6 9.Bg2 Qa4?? 10.Ra4+- 1–0. aleksandras19 – lirycznymorderca, kurnik, 2012.

4.g3 c6 5.Bg2 Nf6 6.c3 Be7 7.Nf3 0-0 8.Nd4 e5 9.Nf3 Bd6 10.0-0 e4 11.Nd4 c5 12.bc5 Bc5 13.e3 Bd4 14.cd4 Nc6 15.Nc3 Be6 16.Qb3 Na5 17.Qb5 a6 18.Qc5? Nc4 19.Ba3 Nd7 20.Qb4 b6 21.Rfd1 a5 22.Qb5 Nf6? 23.Bf8+- Qf8 24.d3 ed3 25.Rd3 Rc8? 26.Nd5 Qd8 27.Nf6 Qf6 28.Rc1 Qg6 29.e4 Qg5 30.Rcc3 h6? 31.d5 1–0. wk1234 – polkasia1, kurnik, 2012.

4.g3 Bc6 5.b5 Bd7 6.Bg2 c6 7.Nc3 cb5 8.ab5 a6 9.Qb1 Bc5 10.Na4 Ba7?? 11.Bg7+- Bb5 12.Nc3 Qb6 13.e3 d4 14.Nb5 ab5 15.Bd4 Qd6 16.Qb5 Nc6 17.Bh8 Rd8 18.Bc6 Ke7 19.Ra7 Qd2 20.Kf1 Qd1 21.Kg2 Qc2 22.Rb7 Kf8 23.Qb4 (23.Qb4 Qc5 24.Qc5 Rd6 25.Qd6 Ne7 26.Qd8) 1–0. wk1234 – butorraktarr, kurnik, 2012.

4.g3 Qe7 5.b5 b6 6.Ba3 c5?? 7.Bg2?? Bc8 8.c4 Bb7 9.Nc3 d4 10.Ne4 f5?? 11.Nd6!!+- Qd6 12.Bb7 Nf6 13.Ba8 e5 14.Nf3 e4 15.Ng5 h6 16.Nh3 Be7 17.Nf4 0-0 18.Bd5 Kh7 19.Bb2 g5 20.Ng2 d3 21.ed3 ed3 22.0-0 Nbd7 23.Bf6 Bf6 24.Ra3 Ne5 25.f4 Ng4 26.Rd3 Bd4 27.Kh1 Nf2 28.Rf2! Bf2 29.Bg8! Kg8 30.Rd6 gf4 31.Nf4 Kh7 32.Qh5 Bd4 33.Qh6 Kg8 34.Rg6 Kf7 35.Qh7 Ke8 36.Re6 Kd8 37.Nd5 f4 38.Rd6 Ke8 39.Qe7 1–0. wk1234 – basiuniapati, kurnik, 2012.

4.g3 Nf6 5.b5 Bd6 6.Bg2 0-0 7.Nf3 c6 8.Nd4 a6 9.e3 ab5 10.ab5 Ra1 11.Ba1 cb5 12.Bf1 b4 13.c3 bc3 14.Nc3 Be5 15.Nf3 Nc6 16.Ne5 Ne5 17.Nd5 Nd5 18.Be5 f6 19.Ba1 e5 20.Bg2 Bc6 21.Qb3 Kh8 22.0-0 Ne7 23.Rd1 Bg2 24.Kg2 Qd5 25.Qd5 Nd5 26.Rb1 b6 27.e4+/– Nc7 28.Rb6 h5 29.Rb7 Ne6+/– 30.Bc3 Ra8 31.Re7 Nc5 32.f3 Nd3 33.Kf1 Nc5 34.Rc7 Ne6 35.Rc6 Ng5 36.Kg2 Rd8 37.h4 Nf7 38.f4 ef4 39.gf4 Nd6 40.e5 Ne4 41.d4 Nc3+/– 42.Rc3 Rd4 43.Kf3 fe5= 44.fe5 Rh4 45.Re3?? Rh3-+ 46.Kf4 Re3 47.Ke3 Kg8 48.Kf4 Kf7 49.Kg5 g6 50.Kh4 Ke6 51.Kg5 Ke5 52.Kg6 h4 53.Kg5 h3 54.Kg6 h2 55.Kf7 h1Q 56.Ke7 Qh7 57.Kd8 Kd6 58.Kc8 Qc7 0–1. wk1234 – kardelinski, kurnik, 2012.

5.Rg3 Qd7 6.Na3 Bb4 7.Qa1 Qf7 8.h4 0-0 9.h5 h6 10.Nf3 Bd6 11.Ne5 Be5 12.Be5 c6 13.e3 Nbd7 14.Bc3 Re8 15.Rh4 e5 16.f4? d4 17.Bb2 ef4 18.Rf4 de3 19.Re3 Re3 20.de3 Nc5 21.g4? Nce4?? 22.Bd3 Qe7 23.Be4 Ne4 24.Nc4?? Be6 25.Ne5 Qh4 26.Ke2 Qh2 27.Kd3 Rd8 28.Bd4 Qd2 0–1. xtom – gambler44 (1615), kurnik, 2011.

5.Rg3 Nbd7 6.Na3 g6 7.Qa1 Bg7 8.h4 Qe7 9.h5 f4 10.Rg5 b6 11.Nf3 Bb7 12.Ne5 Ne5 13.Be5 0-0-0?? 14.h6+- Ne4 15.Bg7?? Qg5+= 16.Bh8 f3 17.e3 fg2+= 18.Bg2 Qg2 19.Rf1 d4! 20.Bd4 e5! 21.d3?? ed4-+ 22.de4 de3 23.Qe5 ef2 24.Rf2 Qg1 25.Ke2 Rd2 26.Kd2= Qf2 27.Kc1? Qe3?? 28.Kb2+= Qh6?? 29.Qe6 Kb8+= 30.Qe8 Bc8 31.Qc8?? Kc8-+ 32.Nb5 1–0. xtom – napata71 (1710), kurnik, 2011.

5.Rg3 Kf7 6.Na3 Bb4-/+ 7.Qa1 Bd6 8.Rf3 Qe7 9.h3 Rf8 10.g4 Kg8 11.g5 Ne4-+ 12.h4 Bd7 13.Nb5 Bb5 14.ab5 a6 15.b6 cb6 16.Nh3 Nc6 17.Nf4 Nb4 18.Kd1 Rac8 19.h5 Nc2 20.Qa2 Nb4 21.Qa1 Bf4 22.Rf4 Qc7 23.Re4 fe4 24.e3 Qc2 25.Ke1 Nd3 26.Bd3 Qd3 27.Bg7 Rf7 28.h6 Rc2 29.Qd1 Qc4 30.Bc3 Rc3 31.dc3 Qc3 32.Kf1 Qd3 33.Qd3 ed3 34.Ke1 b5 35.Rh2 b4 36.Kd2 a5 37.Kd3 Rc7 38.f4 b3 39.Rg2 Rc2! 40.Rc2 bc2 41.Kc2 Kf7 42.Kc3 Kg6 43.Kd4 Kf5 44.Kc5 b6! 45.Kb5 Kg6 46.Ka4 Kf5 47.Kb5= Kg6 48.Ka4 Kf5 49.Kb3?? Kg6 50.Kc3?? Kf5 51.Kd4?? Kg6 52.Ke5?? a4 53.f5 (53.f5 ef5 54.Kd5-+). xtom – gambler44 (1775), kurnik, 2011.

6.Na3 Bg7 7.Qa1 0-0 8.Nf3 Nbd7 9.Ne5 Qe7 10.h4 Ne5 11.Be5 Ne4 12.Re3? Bd7 13.h5 f4 14.Reh3 g5 15.h6 Be5 16.Qe5 Ba4 17.Rh5? Be8 18.d3? Bh5-+ 19.de4 Qf6?? 20.Qf6= Rf6 21.Rh5 Rg6 22.ed5 ed5 23.e3 Re8 24.Bd3 Rb6 25.Rg5 Kh8 26.Rg7 Rh6 27.Rc7 fe3 28.Rb7?? ef2?? 29.Kf2+- Rf6 30.Kg1 a6 31.b5?? ab5? 32.Nb5 Re1 33.Kh2 Rh6 34.Kg3 Re3 35.Kf2 Re8 36.Nc3 Rd8 37.Ke3?? d4= 38.Kd2 dc3 39.Kc3 Rc6 40.Kd2 Rh6 41.g4 Rh2 42.Kc3 Rh6 43.Bf5 Rc6 44.Kb2 Rh6 0–1. xtom – napata71 (1720), kurnik, 2011.

6.Na3 Bg7 7.Qa1 0-0 8.h4 Qe7 9.h5 Ne4 10.hg6= Ng3 11.gh7 Kh8 12.fg3 Bb2 13.Qb2 Qg7 14.Qb3 c6 15.Nf3 Nd7 16.Qe3 Nf6 17.Ng5?? Ng4 18.Qf4?? Qa1 (18...Qa1 19.Nb1 Qb1) 0–1. xtom – gambler44 (1775), kurnik, 2011.

6.Na3 Bg7 7.Qa1 0-0 8.h4 f4 9.Rf3 Qd6 10.h5 g5 11.h6 Bh8 12.Nh3 g4 13.Be5 Qb4 14.Rb3? Qa4-/+ 15.Ng5? Nc6 16.Bb2 Bd7 17.g3? fg3 18.Rg3 Rae8 19.Rh4 e5 20.Nf3 d4 21.Nh2 Rf7 22.c3 Kf8 23.cd4 ed4 24.Bg2 Nb4 25.Bb7? d3 26.Re3 Re3 27.fe3 de2 28.Ke2 Re7 29.Bf6+- Bb5 30.Nb5?? Qb5= 31.Kd1 Qb7 32.Bh8? g3?? 33.Qf6 Rf7?? 34.Qd8 1–0. xtom – napata71 (1705), kurnik, 2011.

6.Na3 Bg7 7.Qa1 0-0 8.h4 Nh5 9.Rg5 Bb2-/+ 10.Qb2 Nc6 11.e3 Qf6 12.c3 Bd7 13.Be2 Ng7 14.Nh3 e5 15.h5 Ne6 16.Rg3 g5 17.b5 Ne7 18.f4 ef4 19.ef4 g4-/+ 20.Ng5? Nf4-+ 21.Rf1 Qg5 22.c4 Ne2 23.Ke2 Rae8 24.Kd1 f4 25.Rd3 Bf5 26.Rd4 c6 27.Rdf4 Bc2! 28.Nc2 Rf4 29.Rf4 Qf4 30.Ne3 d4 31.h6 c5 32.Nd5 Nd5 33.cd5 Qf1 34.Kc2 Qc4 35.Kd1 Qd5 36.Qc2 d3 37.Qc3 Qd4 38.Qb3 c4 39.Qa3 Qg1 0–1. xtom (1620) – napata71 (1630), kurnik, 2012.

6.h4 Bd6 7.Rg5 Rf8 8.Na3 Ne4-+ 9.Qa1 Ng5 10.hg5 Bb4 11.Rh7 Nc6 12.Bg7 Rg8 13.Bf6 Qd6?? 14.Nb5+- Qf4 15.Nc7 Kf8 16.Nf3 Rb8 17.e3 Qe4 18.Bd3 Qg4 19.Ne5 Bd2 20.Kd2 Qg2 21.Qa3 (21.Qa3 Ne7 22.Qe7#; 21.Rf7) 1–0. xtom (1620) – napata71 (1625), kurnik, 2012.

5.g3 Bd6 6.Bg2 0-0 7.h4 c6 8.Nc3 c5 9.e3 b6 10.Nce2 Bb7 11.c4 Nbd7 12.Bf6 Qf6 13.Nc3 Rab8 14.cd5 ed5 15.Nd5 Bd5 16.Bd5 Kh8 17.Bc6 Ne5+= 18.Bg2 Nd3 19.Ke2 Be5 20.Ra3 Nb4 21.f4 Rfd8?? 22.fe5+- Qe5 23.Qe1?? Rd6?? 24.Nf3 Qb2 25.Rc3 Rbd8 26.Qc1 Rd2?? 27.Nd2 (27.Nd2 Qa2 28.Ra3+-) 1–0. wk1234 – ajaceja, kurnik, 2012.

5.h4 Bd6+= 6.h5 h6 7.e3 0-0 8.f3 Bg3-/+ 9.Ke2 c5 10.Ra3 Nbd7 11.Rh3 f4 12.Nc3 d4 13.Na2 e5 14.c3 Nb6 15.ed4 Bh3 16.Nh3 ed4 17.cd4 Nc4 18.Qb3 Re8 19.Kd1+= Qd5?? 20.Bc4+- Re1 21.Kc2 Rd8 22.Nc3 Qc4 23.Qc4 Kh8 24.d5 b6 25.Nf4 Bf4 26.Qf4 Nd5 27.Nd5 Rd5 28.Rd3 (28.Rd3 Rd4 29.Rd4 a6 30.Rd8 Kh7 31.Qf5 g6 32.hg6#; 28.Qh6 Kg8 29.Qg7) 1–0. xtom – napata71 (1665), kurnik, 2012.

5.b5 c6 6.Bg2 Bd6 7.Nf3 0-0 8.Nd4 c5 9.Nf3 b6 10.Ng5 a5 11.c4 Bb7?? 12.0-0?? Qc7?? 13.Ne6+- Qd7 14.Nf8 Bf8 15.Bf6 gf6 16.Qc2 Qe6 17.Nc3 d4 18.Bb7 Ra7 19.Bd5 Qd5 1–0. wk1234 – travessstit, kurnik, 2012.

5.b5 Bd6 6.Bg2 c6 7.Nc3 0-0 8.e3 Nbd7 9.Nge2 Ne4 10.Nd4 Nb8 11.Be4 fe4 12.0-0 c5 13.Nde2+= Bd7 14.d3 ed3 15.cd3 Be8 16.d4 c4 17.Ba3 Ba3 18.Ra3 Qe7 19.Qc1 Bh5 20.Nf4 Be8 21.Qb2 Qf7 22.f3 Bd7 23.g4 Bc8 24.h3 Nd7 25.Qb4 e5 26.Nfd5+/– ed4 27.ed4 Nf6 28.Qc4 Nd5 29.Qd5 Be6 30.Qe4 Rae8 31.Qd3?? Bd5?? 32.f4 (32.f4 Bc4 33.Qf3 Bf1 34.Qf1-+). wk1234 – karlos7, kurnik, 2011.

5.b5 Be7 6.Bg2 0-0 7.Nf3 c6 8.Nc3 Nbd7 9.0-0 e5 10.Na2 e4 11.Nd4 cb5 12.Ne6 Qe8?? 13.Nf8?? Qf8 14.ab5 Nb6 15.f3 Nc4 16.Bc3 Bc5 17.d4?? ed3-/+ 18.Kh1 d4 19.Bd2 dc2 20.Qc2 Nd2 21.Qd2 Be6 22.Rfc1 Rc8 23.Nb4? Bb4-+ 24.Rc8 Bc8 25.Qa2 Kh8 26.Qa7 h6 27.Qd4-/+ Qc5?? 28.Qd8?? Qf8?? 29.Qd4?? Be6 30.f4 Qd6 31.Ra8 Kh7 32.Qd6 Bd6 33.Bb7 Nd5?? 34.Ra6+- Nc7 35.Rd6 Kg8 36.b6 1–0. wk1234 – gunnee1234, kurnik, 2012.

5.Bg2 c6 6.b5 Bd6 7.Ba3 Qe7 8.Bd6 Qd6 9.c3 0-0 10.Qc2 Nbd7 11.Nf3 c5 12.0-0 Ne5 13.Ne5 Qe5 14.f4 Qd6 15.e3 b6 16.d4 c4 17.Nd2 Ne4 18.Ne4 fe4 19.Qa2 Bd7 20.Qa3 Qa3 21.Ra3 Be8 22.Bh3 Rf6 23.g4 Bd7 24.g5 Rff8 25.Bg4 g6 26.h4 Kg7 27.Rf2 Rf7 28.Rh2 Re7 29.h5 Rh8 30.hg6 hg6 31.Rh8 Kh8 32.Ra2 Rh7 33.a5 Re7 34.ab6+- ab6 35.Ra7 Kg7? 36.Rb7 Kf7 37.Rb6 Bc8 38.Kf2 1–0. wk1234 – ajaceja, kurnik, 2012.

4.a4 a5 5.d3 c6 6.bc6 Nc6 7.Nf3 d4 8.c3 e5 9.cd4 Bb4 10.Bc3 (10.Nbd2 ed4 11.e3 Bg4=) 10...Bc3 11.Nc3 ed4 12.Nb5 Nge7 13.Rc1 0-0 14.g3 Nb4 (14...Bg4 15.Bg2=) 15.Bg2 (15.Nfd4 Nec6 16.Nc6 bc6+=) 15...Bd7 (15...Nec6!?=) 16.Nfd4+/– Ned5 17.0-0 Bb5 18.Nb5 Rb8 (18...Rc8 19.Qb3 Rc6 20.e4+/–) 19.Nc3 (19.e4!? Nb6 20.d4 Rc8+-) 19...Nc3+/– 20.Rc3 Qd7 21.Qd2 (21.Rc5!? b6 22.Rb5+/–) 21...Qa4= 22.Qb2 Qa2 (better is 22...Qd7=) 23.Qa2+/– Na2 24.Ra3 Nb4 25.Ra5 b6 26.Rb5 Nc2? (better is 26...Na2+/–) 27.Rfb1?? (better is 27.e3+-) 27...Na3+= 28.Rb6?? (better is 28.Be4+=) 28...Nb1-+ 29.Rc6 Nd2 30.Rc1 Rfe8 31.e4 (31.e3-+) 31…Red8 0–1. Valpa – Knightprancer, playchess.de, 2004.

4.a4 Nd7 5.e3 Ngf6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Nbd7).

4.a4 Nd7 5.Nf3 b6 6.e3 Bb7 7.c4 ab5 8.ab5 dc4 9.Bc4 Ra1 10.Ba1 Ngf6 11.0-0 Bd6 12.Nc3 0-0 13.d3 Ne5 (13...Qe7 14.Qe2=) 14.Ne5 Be5 15.f4 Bd6 16.Bb2 c6 (16...Nd5 17.Bd5 ed5 18.Qf3=) 17.Qe2 cb5 (17...Qd7 18.Ne4 Ne4 19.Qg4-/+) 18.Nb5+= Bc5 19.Ra1 (19.Be5 Nd7+=) 19...Nd5 20.d4 Bb4 21.Ra7 Bc6 22.g3 (22.Ba3 Ba3 23.Ra3 Qe7=) 22...Bb5 (22...Nf6 23.Ba3 Ba3 24.Ra3=) 23.Bb5+= Ba5 (23...Qb8 24.Ra1+=) 24.e4 (24.Qf3 Qb8 25.Rd7 Bc3 26.Bc3 Nc3+=) 24...Nc7 (better is 24...Nc3 25.Qd3 Nb5 26.Qb5 Bd2+=) 25.Bd3?? (better is 25.Bc6+/–) 25...Qb8-/+ 26.Rc7 Qc7 27.e5 Rd8 (27...Rc8 28.Qe4 g6 29.Qe3-/+) 28.f5 (28.Qe4 g6 29.Qe2 Bc3-+) 28...ef5 29.Bf5 (29.e6 f4-+) 29...Bc3-+ 30.e6 (30.Bh7!? Kh8 31.Be4 Bd4 32.Bd4 Rd4 33.Qh5 Kg8 34.Qe2-+) 30...Bb2 (30...Bd4 31.Bd4 Rd4 32.e7 Rd1 33.Qd1 Qe7 34.Be4+/–; 30...Rd4? 31.e7 Rd1 32.Qd1 Qe7 33.Bc3+-) 31.Qb2 fe6 (31...Qd6!? 32.ef7 Kf7 33.Bh7-+) 32.Be6-/+ Kh8 (32...Kf8 33.d5-+) 33.d5 (33.Kg2 Qd6 34.d5 Qc5-/+) 33...Qc5-+ 34.Kg2 (34.Qf2 Qf2 35.Kf2 b5-+) 34...Rd5 (34...b5 35.h3-/+) 35.Bd5-/+ Qd5 36.Kf2 Qc5 37.Kf3 h6 38.h4 (38.Ke4 b5-/+) 38...b5 39.Qb3 b4 40.Qd3 Qc3 (40...Qe5 41.Qb3 Qc3 42.Qc3 bc3 43.Ke3+=) 41.Ke3? (better is 41.Qc3!? bc3 42.Ke3=) 41...Qc1 42.Kf3 (better is 42.Kd4-/+) 42...Qc3 43.Qc3 (43.Ke3 Qe5 44.Kd2 h5-/+) 43...bc3 44.Ke3 c2 (better is 44...g5!?-/+) 45.Kd2= c1Q (45...Kh7 46.Kc2 Kg6 47.Kd3=) 46.Kc1 Kh7 47.Kd2 (47.h5 g6=) 47...Kg6 48.Ke3 Kf5 49.Kf3 g5 50.g4 Kg6 51.h5 Kf7 52.Ke3 Ke6 (52...Ke7 53.Ke4 Ke6 54.Kd3=) 53.Ke4+= Kf6 54.Kd5 Kg7?? (better is 54...Kf7=) 55.Ke6+- (55.Ke6 Kg8 56.Kf6+-) 1–0. Fredek (2065) – Guest858317, Freundschaftspartie, 5m + 0s, 2006.

4.ba6 Ra6 5.d4 Ra8 6.Nf3 h6 7.Nc3 c5 8.e4 Nf6 9.ed5 Nd5 10.Nd5 Qd5 11.dc5 Qd1 12.Rd1 (12.Kd1 f6=) 12...Bc5 (better 12...Ra2!? 13.Bd4 Nc6=) 13.Bg7+= Rh7 (13...Rg8 14.Bh6 Ra2 15.Bg5+=) 14.Bf6+/- Nc6?? (14...Bb4 15.c3 Be7 16.Be7 Ke7 17.Bc4+/-) 15.Bb5 (15.Bd3 Be7 16.Be7 f5+-) 15...Bd7?? (15...Be7 16.Bd3 Bf6 17.Bh7 Ra2 18.Kd2+/-) 16.0-0 (16.Bd3 Be7 17.Be7 Rg7+-) 16...b6?? (better 16...Be7 17.Bd3 Bf6 18.Bh7 Ra2+/-) 17.Ne5 (better 17.Bd3 Be7 18.Be7+- (18.Bh7?! Bf6 19.Be4 Ra4+-)) 17...Ne5-+ 18.Bd7?! (18.a4 Bb5 19.ab5-+) 18...Nd7 19.Bc3 Ra2 20.Rd2 Ra4 0-1. (302) Lisyonok - Br_Rodrigo, Rated Classical game, lichess.org, 2013.

4.e3 c6 5.c4 (5.a4 Nf6=) 5...ab5 6.cb5 Qd7 (6...Nf6 7.Nf3+=) 7.Nf3= cb5 (7...Nf6 8.Be2=) 8.Ne5+= Qd6 9.Bb5 Nd7 10.a3 (10.Qh5 Qe7+=) 10...Ra5 (10...Ngf6 11.a4=) 11.Qc2 (better is 11.Qh5 Qe7 12.Qe2+=) 11...Qc6?? (better is 11...Ne7 12.Qb3 f6=) 12.Bc6+- bc6 13.Qc6 Kd8 (13...Ne7 14.Qc2 f6 15.Nd7 Bd7+-) 14.Nf7 Ke8 15.Qe6 Be7 16.Nh8 Rc5 17.Qf7 Kd8 18.Qg8 Nf8 19.Nc3 1–0. Bonetti,Shane – kanadi, ICC, 2002.

4.e3 Nf6 5.Nf3 c5 (without 6.bc6) (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 a6).

6.Ba1 b6 7.e3 Nf6 8.Nf3 Bd6 9.c4 Bc5 10.cd5 Qd5 (10...ed5!? 11.Qc2 0-0=) 11.Bf6+= Bb4?? (better 11...gf6 12.Nc3 Qa8+=) 12.Qa4 (better 12.Bg7!? Rg8 13.Nc3 Qd8+-) 12...Bd2 13.Nbd2 gf6 14.Bc4 Qc5 (14...Qd8 15.0-0+-) 15.Qa8 0-0 16.Qb8 Qb4 (16...Ba6 17.Qa7 Bb5+-) 17.0-0 (17.Qc7 Qa3 18.0-0 Qc5+-) 17...Bd7 (17...Qc5 18.Ra1 Bd7 19.Qb7+-) 18.Qc7 Bb5 (18...Qe7 19.Ne4 Kg7 20.Qb6+-) 19.Qg3 (better 19.Rb1 Qc3 20.Rb5 Qc1 21.Nf1 Qc2+-) 19...Kh8 20.Qh4 (better 20.Rb1!? Qb1 21.Nb1 Bc4+-) 20...Bc4 21.Nc4 Qc4 (21...Kg7+-) 22.Qc4 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

6.Ba1 c5 7.c4 dc4 8.e3 Qa5 9.Nc3 Qb4 10.Nf3 Nd7 11.Qa4 Nb6 12.Qa7 Nd5 13.Be2 (13.Qa2!?=) 13...Nc3-/+ 14.Bc3 Qb1 15.Bd1 f6 (15...Qb5?? 16.Ba4 Qc6 17.Bc6 bc6 18.Ne5+-) 16.0-0 Ne7 (16...Qd3 17.Qa2+=) 17.Ba4 (17.Qc5!? Qd3 18.Nd4+/–) 17...Qe4 18.b6 Bd7?? (better is 18...Kf7=) 19.Qb8+- Kf7 20.Bd7 Ng6 (20...h6+-) 21.Qe8 (21.Qe8 Kg8 22.Be6 Qe6 23.Qe6) 1–0. grandma (1680) – wierdaj, gameknot.com, 2011.

6.Ba1 Qd7 7.e3 b6 8.f4 (better is 8.Nf3+=) 8...Bd6?? (8...f6 9.Qh5 Qf7 10.Qf7 Kf7 11.Nf3=) 9.Nf3 (better is 9.Bg7 e5 10.Bh8 ef4 11.ef4 Bf4 12.Bd3+-) 9...Nf6 (9...f6 10.Be2=) 10.c4 (10...Qd8 11.cd5 ed5 12.Bd3=; 10.Bf6 gf6 11.Nc3 Bb7=). pcmvr (2530) – tomy (2175), net–chess.com, 2006.

6.Ba1 Qd7 7.e3 c6 8.d4 Nf6 9.c4 cb5 10.cb5 Be7 11.Nc3 0-0 12.Ke2 Qd8 13.Ke1 Nbd7 14.Nf3 b6 15.Be2 Bb7 16.Bd3 Nb8 17.Ne5 Nbd7 18.Nd7 Qd7 19.Ke2 Ne4 20.Be4 de4 21.Na2 e5 22.Nc1 ed4 23.Qd4 Qe6 24.Qb2 Bf6 25.Qb1 Ba1 26.Qa1 Qc4 27.Kd2 Qb5 28.Qc3 Ba6 29.Nb3 Rd8 30.Kc1 Qe2 31.Re1 Qf2 32.Nd4 Rc8 33.Qc8 Bc8 34.Re2 Qf1 35.Kd2 Qf6 36.Re1 Qd6 37.Rd1 Qd8 38.Ke2 Qe8 39.Rd2 Be6 40.Nf3 Bc4 41.Ke1 ef3 42.gf3 Be6 43.Kf2 b5 44.Re2 b4 45.Re1 Qf8 46.Re2 b3 47.f4 b2 48.f5 b1Q 49.fe6 Qf5 50.Ke1 Qe6 51.Rf2 Qfe7 52.Re2 Qe3 53.Kf1 Qe2 54.Kg1 Q7e3 55.Kh1 Q3f3 0-1. TimC (2440) - WhybeHappy (2310), Rated Bullet game, lichess.org.

6.Ba1 Qd7 7.e3 f6 8.Nf3=.

6.Ba1 Bd7 7.e3 c6 8.bc6 Bc6 9.Nf3 Qa5 10.Bc3 Bb4?? (better is 10...Qd8+=) 11.Bg7+- Bf8 12.Bh8 f6 (12...Nd7 13.Be2+-) 13.Nd4 Bd7 (14.Qh5 Kd8 15.Qh7 Nh6 16.Bf6 Kc8+-; 13...Qc7 14.Ne6 Qf7 15.Nf8 Qf8 16.Qh5 Qf7 17.Qh3+-) +-. pcmvr – PiedPiper, ChessWorld.net, 2002.

6.Ba1 Bd7 7.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7).

6.Ba1 Nd7 7.e3 Nb6 8.c4 Bb4?? (better 8...Nc4 9.Nf3 Nd6-/+) 9.Bg7+- Nh6 (9...dc4 10.Bh8 Qg5 11.Qc2 Qb5 12.Qh7+-) 10.Bh8 dc4 (10...Nc4 11.Qc2+-) 11.Nf3 (11.Qh5 Bf8 12.Nc3 Qd6+-) 11...Nf5 (11...Qd7 12.Qc2 Qb5 13.Qh7+-) 12.Bc3 (12.Qc2 Be7+-) 12...Bc5 13.Be2 (13.Ne5 Qg5+-) 13...f6 (13...Nh4 14.Nh4 Qh4 15.Ba5+-) 14.0-0 (14.d3 cd3 15.Bd3 Nd5+-) 14...Qe7 (14...Bd7 15.d4 Be7 16.Ba5 Bb5 17.Bb6 cb6 18.Qc2+-) 15.Qc2 Nd7 (15...Nd6 16.d4 cd3 17.Bd3+-) 16.d4 (16.Bc4 Bd6+-) 16...Bd6 (16...cd3 17.Bd3 Nd6 18.Nbd2+-) 17.Bc4 Ng7 (17...Nb6 18.Bd3+-) 18.Qh7 Qf7 (18...Nb6 19.Bd3+-) 19.Bd3 Nb6 (19...Qf8+-) 20.Bg6 Qg6 21.Qg6 Kf8 22.Qf6 Kg8 23.d5! Nd7 (23...Nd5 24.Qg7 Mate attack; 23...ed5 24.Qg7 Mate attack) 24.Qg7 1–0. BeepBeepImAJeep (2635) – bovbov (1620), lichess.org, 2018.

6.Ba1 f6 7.e3 e5 8.c4 Be6 9.Nf3 (9.cd5 Qd5 10.d4 Nd7=) 9...dc4=+ 10.Qc2 Qd5 11.Nc3 Qc5 12.Be2 (12.d4 cd3 13.Bd3 Qa3=) 12...Nd7 13.0-0 Nb6 14.Bb2 Ne7 (14...c6 15.bc6 Qc6 16.d4 cd3 17.Bd3=) 15.Ra1= Ned5 (15...Qb4!?=) 16.Ba3+= Nb4 (better 16...Qa3!? 17.Ra3 Ba3 18.Nd5 Bd5+=) 17.Qb2+- c6 (17...Bf5 18.e4 Bg4 19.Rb1 Bf3 20.gf3+-) 18.Rb1 (18.bc6 bc6 19.Rb1 Kd7+-) 18...cb5 (18...N6d5 19.Nd5 cd5 20.Bb4 (worse 20.Qb4 Qa7 21.b6 Qa3 22.Qa3 Ba3=+) 20...Qb5 21.Bf8 Qb2 22.Rb2 Rf8 23.Rb7+-) 19.Bb4 Qb4 20.Qb4 Bb4 21.Rb4 Nd5 (21...Kd7 22.Rb5 Kc6 23.d4 cd3 24.Bd3+-) 22.Nd5 (22.Rb5 Nc3 23.dc3 0-0+-) 22...Bd5 23.Rb5 Bc6 24.Rb4 (24.Bc4?! Bb5 25.Bb5 Ke7+-) 24...b5 25.d3 (25.Bc4 Ke7 26.Bb3 Rd8+-) 25...cd3 26.Bd3 e4? (26...Ke7+-) 27.Be4 (27.Be4 Be4 28.Re4 Kd7 29.Rb4+-) 1–0. BeepBeepImAJeep (2575) – auditor2016 (2385), lichess.org, 2017.

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

6.Ba1 Nf6 7.e3 c5 8.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.Nf3).

6.Ba1 Nf6 7.e3 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Be7).

6.Ba1 Nf6 7.Nf3 Be7 8.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Be7 8.Nf3)

6.Ba1 g6?? 7.Bh8+- Qd7 (7...Bd6 8.Nc3+-) 8.e3 Qb5 1–0. GuestSNPJ – GuestPFXQ, freechess.org, 2018.

7.e3 Qa5 8.Bc3 Qb5?? 9.Bb5+- cb5 10.Nf3 Bd7 11.0-0 Nc6 12.Bb2 Nf6 13.d4 (13.Bf6!? gf6 14.Qe2 b4+-) 13...Bd6 14.Nbd2 0-0 15.Ne5 Ne5 (15...Bb4+-) 16.de5 Be5 17.Be5 Ne4 (17...Rc8 18.e4!+-) 18.Ne4 de4 19.Qd7 Rd8 20.Qd8 1–0. BeepBeepImAJeep (2570) – KiNgLeBrE (1710), lichess.org, 2018.

7.e3 Qa5 8.Bc3 Qb6 9.bc6 (9.Be2 c5=) 9...bc6 10.Nf3 Nd7 11.Be2 Ngf6 12.0-0 Bb4 (12...Bd6 13.Bf6 Nf6 14.c4=) 13.d4 (13.Bb4 Qb4 14.d4 0-0=) 13...Bc3 (13...Bd6 14.Nbd2=) 14.Nc3 0-0 15.Bd3 c5 16.Na4 Qc7 17.dc5 Nc5 (17...e5 18.Be2=) 18.Nc5 Qc5 19.Nd4 (19.Qa1 Bb7=) 19...e5 20.Nb3 Qd6 21.c4 dc4?? (21...Qb4 22.Qc2 e4 23.Be2=) 22.Bc4 (better 22.Bh7 Nh7 23.Qd6 cb3 24.Qe5+-) 22...Rd8 23.Qd6 Rd6 24.Rc1 g6 25.h3 Be6 26.Be6 Re6 27.Rc8 Kg7 28.Nc5 Rb6 29.Rc7 Rb1 30.Kh2 Rb2? (30...Kf8 31.e4=) 31.Nd3 (31.Ne6 Kh6 32.Rf7 Rf2+-) 31...Rd2 (31...Rb5!?+=) 32.Ne5+- Rf2 33.Rf7 (worse 33.Nf7 Ne8 34.Re7 Kf8 35.Re8 Ke8 36.Nd6 Ke7-/+) 33...Kh6 (better 33...Kg8!?+-) 34.Rf6!+- Rf6 35.Ng4 Kg5 36.Nf6 Kf6 37.Kg3 Ke5 38.Kf3 h5 (38...Kf5+-) 39.h4 Kf5 (39...g5 40.hg5 Kf5+-) 40.e4 Ke5 41.Ke3 Kf6 42.Kf4 Ke6 43.Kg5 Ke5 44.Kg6 Ke4 45.Kh5 Kf4 46.g4 Ke5 47.Kg6 1–0. BeepBeepImAJeep (2590) – superman_123 (1785), lichess.org, 2017.

7.e3 cb5 8.Bb5 Bd7 9.c4 Bc6 10.Qa4 Bd6?? (better 10...dc4 11.Qc4 Qg5 12.Bc6 Nc6=+) 11.Bg7 1–0. GuestXJLS – GuestFSSF, freechess.org, 2017.

7.e3 Bc5?? 8.c4 (better 8.Bg7 Nf6 9.Bh8+-) 8...Nf6= 9.Qc2 0-0 (9...b6 10.bc6 Nc6 11.cd5=) 10.Nf3 (10.Bf6 gf6 11.cd5 Qd5+=) 10...Nbd7 11.Nc3 (11.d4 Be7=) 11...Re8 (11...e5 12.cd5 cd5 13.d4=+) 12.Na4 (better 12.d4 Bb4 13.Be2=) 12...Qa5?? (better 12...Bb4=) 13.Nc5?? (better 13.Bf6 gf6 14.Nc5 Nc5 15.cd5 Qa1 16.Ke2+-) 13...Qa1-+ 14.Ke2 Nc5 15.cd5 Nce4 16.dc6 bc6 17.bc6 (17.g4 Qa5 18.Ke1-+) 17...Ba6 18.d3 Nc3 (18...Rb8 19.c7 Rb2 20.c8Q Bc8 21.Ne1 Nc3 22.Kd2-+) 19.Kd2 Nb1 20.Ke2 (20.Ke1 Rb8 21.Qc1 Qa5 22.Nd2 Nd2-+) 20...Ne4 21.Qb3 (21.Nd4 Rb8 22.c7-+) 21…Nbc3 (21...Nbc3 22.Qc3 Nc3 23.Kd2 Qb2 24.Ke1 Qc1) 0–1. AhmedSultanov (1665) – Martau (1650), lichess.org, 2019.

7.e3 Bd7 8.Nc3 Qb6 9.bc6 Bc6 10.Qb1 (10.Nb5 Nd7 11.Qb1 Ngf6=) 10...Qb1 11.Nb1 Nd7 12.d4 (12.f4 Ngf6=) 12...g6 (12...Ngf6 13.Bb2=+) 13.Nf3= f6 14.c4 Bb4 15.Bc3 Bd6 (15...Bc3 16.Nc3 dc4 17.e4+=) 16.cd5 (16.c5 Bb8+=) 16...Bd5 17.Be2 (17.Nbd2 Bc6=) 17...Ne7 18.0-0 0-0 (18...Kf7 19.Rc1=+) 19.Nbd2 (19.Nfd2 Kf7=) 19...e5 (19...Rc8 20.Rc1=) 20.de5 Be5 (20...Ne5 21.e4 Nf3 22.Bf3=) 21.Be5 (21.Ne5!? fe5 22.e4+=) 21...Ne5= 22.Ne5 fe5 23.Bf3 (23.e4 Bc6=) 23...b5=+ 24.e4 (better 24.Ra1=+) 24...Bc4 (better 24...Be6=+) 25.Nc4+/- bc4 26.Rc1 Rc8 27.Be2 (better 27.Bg4 Rd8 28.Be2+/-) 27...c3=+ 28.f3 g5 29.g4 (29.Kf2 Rc5=+) 29...Ng6 30.Kf1 Nf4 31.Rc2 (31.Kf2 Kf7-/+ (31...Ne2?! 32.Ke2 Kg7 33.Kd3+=)) 31...Kg7 32.Kf2 Kf6 33.Bd1? (better 33.Ke3!?-/+) 33...Nd3-+ 34.Ke3 Ne1 (better 34...Nb4-+) 35.Rc1-/+ c2 (35...Ke7 36.Ke2 Ng2 37.Kd3 Nf4 38.Kc2-/+) 36.Be2 (better 36.Bc2 Rc2 37.Re1 Rh2 38.Rb1=) 36...Rc3?? (better 36...Rb8-/+) 37.Kd2+- Nf3 (37...Rf3 38.Re1 Rh3+-) 38.Bf3 (better 38.Kc3 Nd4 39.Bd3+-) 38...Rf3=+ 39.Rc2 Rf2 (39...Rh3 40.Kd1=+) 40.Ke3?? (better 40.Kd3 Rf4 41.Rc6 Kf7 42.Rh6=) 40…Rc2-+ 0-1. lamah - kuku100, Rated Classical game, lichess.org, 2013.

7.e3 Bd7 8.bc6 bc6 9.Nf3 Nf6 10.Be2 Bd6 11.h3 0-0 12.0-0 c5 13.d3 Nc6 14.Nbd2 Qc7 (14...Qe7 15.e4 d4 16.Nc4+=) 15.e4 (15.Bf6 gf6 16.c4 d4=) 15...Ne5 (15...d4 16.c3 e5 17.Qc2+=) 16.Ne5 Be5 17.Be5 Qe5 18.Nf3 Qb2 19.Qb1 (19.e5!? Ne8 20.Qb1+=) 19...Rb8+= 20.Qd1 (better is 20.Qb2!? Rb2 21.e5+=) 20...Ba4-/+ 21.Ne1 g6 (21...de4 22.de4 Ne4 23.Bd3-/+) 22.ed5 Nd5 23.Kh1 Nc3 (23...Qc3!?-/+) 24.Qd2+= Ne2 25.Qe2 Qc3 26.Kg1 (26.f4 Rb1-/+) 26...Rb2-/+ 27.Qf3 Bc2 28.Nc2 Rc2 29.Rd1 c4 (29...Kg7 30.Rb1-/+) 30.dc4 (30.Qe3!?-/+) 30...Qf3-+ 31.gf3 Rc4 ½–½. Valpa – Cccmember, playchess.de, 2005.

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

5.e3 a5 6.Nf3 c5 7.c4 Nf6 8.d4 cd4 9.Qd4 Bb4 10.Nc3 (10.Nbd2 Nbd7+=) 10...Nbd7= 11.Be2 Nb6 (11...Nc5 12.Nd2=) 12.c5 Nbd7 13.c6 bc6 14.bc6 Nc5 15.Qe5 (15.Rb1 Na4 16.0-0 Nb2 17.Rb2 0-0=) 15...0-0 (15...Ba6!? 16.Rb1 Qc8=+) 16.0-0+= Nfe4? (better 16...Qb6!? 17.Nd4 Ba6+=) 17.Ne4+- f6 18.Nf6! Rf6? (18...Qf6 19.Qf6 Decoy; 18...Rf6 19.Qg5 Decoy; 18...gf6 19.Qg3 Combination) 19.Qg5 Ne4 20.Bf6 Nf6 21.Nd4 Be7 22.Bd3 (22.Rac1 Ne4 23.Qg4 Nc5+-) 22...Ne4 23.Qh5 Bf6 (23...g6 24.Qe2 Nc5+-) 24.c7! Qc7 (24...Qc7 25.Qe8 Mate attack) 25.Qe8 1–0. GuestDQRS – GuestWJZL, freechess.org, 2019.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Qb6 8.Na3 (8.Be2 f6=) 8...Nf6 (8...Ba3? 9.Bg7 Bd6 10.Bh8+-) 9.Qc1 Qa5 10.Bb2 Bd7 11.c4 cb5 (11...Be7 12.Nf3+=) 12.cd5 Nd5 13.Nb5 Bc6 (13...Qb5 14.Bb5) 14.Nf3 f6 15.Be2 Kf7 (better is 15...e5=) 16.0-0?? (better is 16.Nfd4+=) 16...Bb5-+ 17.Bb5 Qb5 18.Nd4 Qd7 19.Nb3 Bd6 20.d4 Rc8 21.Qd1 Qc7 (21...Qb5 22.Ba1-+) 22.Qh5 Kg8 23.Rc1 Qd7 24.Nc5 (24.Rb1 f5-+) 24...Bc5 25.Rc5 Rc5 26.dc5 Nc6 (better is 26...Na6 27.Qg4 Nc5 28.h3-+) 27.e4 (27.h3 Nc7 28.Qg4 Na6-+) 27...Nde7 (better is 27...Nf4 28.Qg4 Qd2 29.h4-+) 28.Qg4 (28.Qe2 Nb4-+) 28...Ng6 (better is 28...Qd2 29.Qe6 Kf8 30.h3 Qb2 31.Qc4-+) 29.h4 Nce5 (29...Nce5 30.Be5 Ne5-+ (worse is 30...fe5 31.Qg5-+)) 0–1. Nielsen,Joergen Axel – Hermansen, Denmark, 1968.

5.e3 ab5 6.ab5 Ra1 7.Ba1 f5 8.c4 (8.Nf3 Nf6=) 8...Nf6= 9.Nf3 Bd6 10.Nc3 (10.d4 dc4 11.Bc4 cb5 12.Bb5 Bd7 13.Bd7 Qd7=) 10...0-0 11.Be2 Nbd7 12.0-0 (12.Nd4 Ne5 13.bc6 Nc6= (< 13...dc4 14.cb7 Bd7 15.f4+/–)) 12...Ne4 (12...e5 13.Qc2=+) 13.Ne4 (better is 13.d3!? Nc3 14.Bc3=) 13...fe4 14.Nd4 e5?? (better is 14...Ne5=+) 15.Ne6+/– (15.bc6?! ed4 16.cd7 Bd7 17.Bd4 Qg5=) 15...Qf6 (15...Qh4!? 16.Nf8 Nf8+-) 16.Nf8+- Nf8 17.g3 (better is 17.f3!? ef3 18.Bf3+/–) 17...Bh3+= 18.Re1 Ne6 (better is 18...Qe6+=) 19.cd5+- cd5 20.Bf1 (better is 20.Qb3 d4 21.Qd5+-) 20...Ng5-/+ 21.Kh1 Bf1 (< 21...Qf2 22.Bh3 Nh3 23.Rf1+/–) 22.Rf1 Nf3 23.Kg2 Qh6 24.h3 g5 (better is 24...Bf8!?=) 25.Rh1 Qf6 (25...Bb4 26.d3 Nd2 27.de4+-) 26.d4 (better is 26.d3 Qe6 27.de4 de4 28.Qc2+-) 26...ed4= 27.Bd4 Nd4 (27...Qf5 28.Qe2+/–) 28.ed4 (28...Kg7 29.h4+-) 1–0. stoker – fierce, Live Game Caissa's Web, 2004.

5.e3 c5 6.c4 a5 7.Nf3+= Nd7 8.cd5 (8.d4 Ngf6+=) 8...ed5= 9.Nc3 Ndf6 10.Be2 (10.Bd3 Nh6=) 10...b6 (10...d4 11.Na2 d3=+) 11.0-0 (better 11.d4+=) 11...Bd6?? (better 11...d4!?-/+) 12.Qc2 (better 12.Nd5!? Bg4 13.e4+-) 12...Be6 13.Ng5 Bg4 (13...Ne7 14.Ne6 fe6 15.f4=) 14.Bg4 Ng4 15.f4 N4f6? (15...Nh2 16.Nd5 Nf1 17.Qe4 Kf8 18.Nh7 Rh7 19.Qh7+-) 16.Qf5 (better 16.Nd5 Be7 17.Nf6 Nf6 18.Nh7+-) 16...Nh6 (16...Ne7 17.Qh3=) 17.Qd3 Qe7?? (better 17...c4 18.Qc2 Bc5+=) 18.Nd5+- Nd5 19.Qd5 0-0 20.Rf3?? (better 20.Qd3 g6 21.Ne4+-) 20...Qe6?? (better 20...Rad8 21.Qd3 Qg5 22.fg5 Bh2 23.Kh2 Ng4 (23...Rd3?? 24.gh6 g6 25.Rf6+-) 24.Kh3 Rd3 25.Kg4 Rd2+-) 21.Ne6+- (21.Ne6 fe6 22.Qe6 Rf7 23.Qd6+-) 1–0. GuestZVTQ – GuestHDRE, freechess.org, 2018.

5.e3 c5 6.c4 dc4 7.Bc4 f6? (better 7...ab5!? 8.Bb5 Nc6+=) 8.Qh5 (8.Nc3!? ab5 9.Nb5 Nc6+-) 8...g6+- 9.Qf3 e5 (9...ab5!? 10.Bb5 Nc6+-) 10.Be5+- fe5?? (better 10...Nd7 11.Bf4 ab5 12.Bb5 Kf7+-) 11.Qf7 1–0. DEFFM – GuestGCML, freechess.org, 2019.

5.e3 c5 6.c4 Nf6 7.d4=.

5.e3 Bd7 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 cb5 9.Nc3 (9.Ne5 b4=) 9...b4=+ 10.Nb5 Qb6?? (better 10...f6=+) 11.Bd4+- Qa5 12.Nd6! Bd6? (better 12...Ke7!? 13.Ne5 Nh6+-) 13.Bg7+- 1–0. DEFFM – GuestPNRZ, freechess.org, 2018.

5.e3 f5 6.Nc3 (6.Nf3 Nf6=) 6...Nf6 7.Nf3 (7.f4 Be7=) 7...g6 (7...Bd6 8.Be2=) 8.g3 (8.Be2 Bd6=) 8...Bg7 (8...Bd6 9.Ne2=) 9.Bg2 Nbd7 (9...Ne4 10.0-0=) 10.bc6 bc6 11.0-0 (11.Nd4 Ne5=) 11...Rb8 12.Ba3 (12.Rb1 e5=) 12...Ne4 (12...c5!?=+) 13.Ne4= fe4 14.Nd4 Ne5 (14...Bd4 15.ed4 Qf6 16.d3 Qd4 17.de4 Qd1 18.Rad1+=) 15.d3 ed3 (15...Bd7 16.de4 Nc4 17.Bc5+=) 16.cd3 Qd7 (16...Bd7!?+=) 17.Rc1+- Bf8 (17...g5 18.Bh3 g4 19.Bg4 Ng4 20.Nc6+-) 18.Bf8+- Kf8 (18...Rf8 19.f4 Nf7 20.Rc6+-) 19.f4 Ng4?? (better 19...Nf7+-) 20.Qg4 Kg7 (20...Rb4 21.Qg5 Rd4 22.Qf6 Kg8 23.Qd4+-) 21.f5 ef5 (21...Kg8 22.Qf4 Rb2+-) 22.Nf5 Qf5 23.Qd4 Kh6 24.Qh8 Qe6 25.Qf8 Kh5 26.Bf3 Qg4 27.Bg4 Bg4 28.Qe7 Kh6 29.Rf7 Rh8 30.h4 (30.h4 Rf8 31.Rh7) 1–0. Janek – Gutes, internet free game, 2017.

5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 c6).

5.e3 c5 6.c4 Be7 7.Nf3 0-0 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 a6 8.a4).

5.e3 Nbd7 6.Nf3 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 Nbd7 8.Nf3).

5.Bb5 Bd7 6.c4 Bb5 (6...c6!? 7.Ba4 dc4-/+) 7.cb5+= Qd7 8.a4 f6 9.Nf3 Bd6 10.d4 Ne7 11.Nbd2 0-0 12.0-0 c6 13.Qb3 c5 14.dc5 Bc5 15.Rfc1 Rc8 16.Bd4 Bd4 17.Rc8 Qc8 18.Nd4 e5 19.N4f3 Qe6 20.Rc1 Nd7 21.Ne4 Rc8 (better is 21...f5!? 22.Nc3 Nc5=) 22.Rc8+= Nc8 23.Nc3 Ncb6 (23...Ne7 24.e4+=) 24.e4 Nc5 25.ed5 Nb3 26.de6 Kf8 27.Kf1 (27.Nh4 g6 28.g4=) 27...Ke7+= 28.Ke2 Nc5 29.a5 Nc4 30.a6 ba6 31.ba6 Na6 32.Kd3 Nd6 33.Ne4? (33.Ke2 Ke6 34.g4 Nb4-/+) 33...Ke6 (better is 33...Nb4 34.Ke2 Ne4-+) 34.Nd6-/+ Kd6 35.Nd2 Kd5 36.g3 Nc5 37.Ke3 f5 38.f3 g5 39.h3 h5 Black prepares g4 40.f4 (40.Nf1 f4 41.Ke2 Nb3-+) 40...g4 (40...h4 41.fg5 hg3 42.Kf3-+) 41.h4 (better is 41.hg4!? hg4 42.fe5 Ke5 43.Nc4 Kf6 44.Kf4-+) 41...Ne4-+ 42.Ne4 (better is 42.Nf1-+) 42...fe4?? (better is 42...ef4 43.Kf4 fe4-+) 43.f5+- Kd6 (43...Kc5 44.Ke4 Kd6+-) 44.Ke4 (44.Ke4 Ke7 45.Ke5+-) 1–0. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

6.Bd3 Nd7 7.f4 Qh4 8.g3 Qh6 9.Nf3 Ngf6 10.0-0 Bd6 11.a4 (11.Be2 0-0+=) 11...0-0 (11...Nc5 12.Ba3-/+) 12.a5 Bc7 13.Bc3 Re8 14.Ne5 Nc5 15.Qf3 Nd3 16.cd3 Nd7 17.Na3 (17.d4!?+=) 17...Nc5-/+ (worse is 17...Ba5 18.Nc2 Bc3 19.Ra8 Be5 20.fe5 Ne5 21.Qe2+=) 18.h4 f6 19.h5 fe5 20.fe5 Bd7 21.Qf7 Kh8 22.d4 Ne4 (22...Na6 23.Qd7 Qg5 24.Qf7 Qg3 25.Kh1 Qh4 26.Kg2+=) 23.Qd7-/+ Qg5 24.Qf7 Qg3 25.Kh1 g6 (better is 25...Nc3 26.dc3 Qh3 27.Kg1 Qe3 28.Kh2 Ba5-/+) 26.Qf4? (better is 26.Rf3 Qh4 27.Kg2 gh5 28.Rb1-+) 26...Qh3 27.Qh2 Ng3 28.Kg1 Qh2 29.Kh2 Nf1 30.Rf1 Ba5 (30...Ba5 31.Nc2 gh5-+) 0–1. pcmvr (2740) – vbotond (2740), net–chess.com, 2007.

6.Bd3 Nf6 7.Nf3 Ne4 8.Be4 (8.0-0 f6=) 8...de4=+ 9.Ne5 Bd6 (9...Qh4 10.Nc3=+) 10.Qh5 (10.Qg4 Bf8+=) 10...g6 (10...0-0!? 11.Nc4 Be7=) 11.Qh6+= Bf8 (better 11...Rf8!?+=) 12.Qf4+- Qd5?? (better 12...f5 13.Nc6! Nc6 14.Bh8 Nb4+-) 13.Qf7 Kd8 14.Qf6 (14.Qf6 Kc7 15.Qh8+-) 1-0. onikichi – laks, Rated Classical game, lichess.org, 2013.

6.Bd3 Nf6+= 7.f4 Na6 8.Nf3 (8.Be2 Be7=) 8...Nc5 (8...Nb4 9.0-0+=) 9.Be2 Na4 (9...Be7 10.Nc3+=) 10.Bd4= Bc5 11.Bc5 Nc5 12.0-0 b6 (12...b5 13.Ne5 Qd6 14.c3=) 13.Qe1 (13.Nc3 Ba6=) 13...Ba6 (13...0-0 14.Ne5 Qd6 15.d3=) 14.d3 0-0 15.Ne5 (15.Nc3 b5=) 15...Qc7 16.Nd2 Ncd7 (16...Ra7 17.Ndf3=) 17.Nd7 (17.Qg3 Ne4 18.Ne4 de4 19.Nd7 Qd7=) 17...Nd7 (17...Qd7 18.Nf3=) 18.a4 (18.Qg3 Nf6=) 18...Bb7 19.Nb3 White prepares the advance a5 (19.c4 Ra7+=) 19...c5 (19...Ra7 20.f5+=) 20.a5= Rfb8 (20...ba5 21.Ra5 Qb6 22.Ra8 Ra8 23.Qh4+=) 21.ab6 Qb6 22.Qc3 h6 (22...Rc8 23.Ra8 Ra8 24.Ra1=) 23.d4 cd4 24.Qd4 (24.ed4 Ba6 25.Ba6 Ra6 26.Ra6 Qa6=) 24...Qc7 (24...Qc6 25.Bd3=) 25.Bd3 (25.Bd3 Bc6 26.Qc3=). pcmvr (1930) – TonyPA (1645), internet, 2006.

6.Bd3 Nf6 7.f4 Bd6 8.Nf3 (8.Nf3 0-0 9.0-0+=). pcmvr (2530) – tomy (2175), net–chess.com, 2006.

6.Bd3 Nf6+= 7.f4 Be7 8.Nf3 +=.

6.Be2 Nf6 =.

4.a4 a6 5.e3 Bd7 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 Bc5?? 9.Bg7+- f6 10.Bh8 Nh6 11.Be2 (better 11.Nh4 Ke7 12.Bg7 Nf7+-) 11...Kf7 12.d4 Bd6 13.c4 (13.Bf6 Qf6 14.c4 Kg7+-) 13...Qh8 14.Qb3 (14.cd5 ed5 15.Qb3 Be6+-) 14...dc4 15.Bc4 Qg7 16.0-0 Ng4 17.h3 Qh6 (17...Nh6+-) 18.hg4 c6 (18...Qg6 19.Qd3+-) 19.Nbd2 (19.bc6 Nc6 20.Qb6 Ke7+-) 19...cb5 20.Bb5 Bb5 (20...Qf8 21.g5 Qe7 22.Ne4+-) 21.Qb5 e5 (21...Qf8 22.Ne4 Be7 23.Qb6+-) 22.Nc4 e4 (22...Bc7 23.Qd5 Kg7+-) 23.Nd6 Kg7 (23...Ke6 24.Qe8 Kd5 25.Nf5 Kc4 26.Qa4 Kd5 27.Qa2 Kc6 28.Rc1 Kb5 29.Qc4 Ka5 30.Ra1) 24.Nf5 Kg6 (24...Kf7 25.Qd5 Kf8 26.Qd8 Kf7 27.Qe7 Kg8 28.Nh6 Kh8 29.Qf6) 25.Qe8 1–0. BeepBeepImAJeep – Alexandr_B, lichess.org, 2016.

4.a4 Nf6 5.d3 (5.Nf3 a6=) 5...Bd6 (5...a6 6.Nf3=+) 6.Nf3 h6 (6...0-0 7.Nbd2=+) 7.e3 (7.Nbd2 Nbd7=) 7...0-0 8.Be2 Bb7 9.Bd4 (9.0-0 a6=) 9...c5=+ 10.Bb2 (10.Be5 Be5 11.Ne5 Qc7=+) 10...Nbd7 11.Nbd2 e5 12.0-0 (12.Nh4 g6=+) 12...Re8 (12...Qc7 13.Nh4=+) 13.c3 (13.Nh4 a6=) 13...Rc8 (13...Qc7 14.h3=+) 14.Re1 (14.Nh4 a5=) 14...e4 15.Nh4 Ne5 (15...Qc7 16.h3=+) 16.d4 (16.de4 de4 17.c4 Qd7=+) 16...Nd3 17.Bd3 ed3 18.Nf5 c4 (18...Bb8 19.Qf3=+) 19.Bc1 (19.Qf3 Bb8=+) 19...Qd7 (19...Bc7 20.Qf3=+) 20.Nd6 (20.Qf3 Qe6=) 20...Qd6=+ 21.Nf3 Ng4 22.g3 Re4 23.Nh4 Qf6?? 24.f3+- Rce8 25.fe4?? Qf2 (26.Kh1 Qh2) 0–1. Rudolf – joelynnturner, internet, 2007.

4.Nc3 a6 A) 5.e3 A1) 5...Bb7 6.a4 (6.Nf3 Nf6 7.Bd3 ab5 8.Nb5 c6 9.Bf6 gf6 10.Nc3; 6.h3 Nf6 7.Nf3 Bd6 8.a4 0-0 9.Be2 Nbd7 10.0-0) 6...Nf6 7.Nf3 Bd6 8.Bd3 Nbd7 9.0-0 Nc5 10.ba6; A2) 5...ab5 6.Nb5 (6.Bb5 Bd7 7.Nf3 Nf6 8.Ne5 Bd6 9.Nd7 Nbd7 10.0-0) 6...Nd7 7.Nf3 Ngf6 8.Nbd4 Bb7 9.Bb5 Ba3 10.Ba3; A3) 5...Nf6 6.f4 (6.Nf3 Bd6 7.a4 0-0 8.a5 ba5 9.Ra5 e5 10.Qa1; 6.Bd3 e5 7.a4 Bd6 8.a5 ba5 9.Ra5 0-0 10.Nh3) 6...Bd6 7.Nf3 0-0 8.Bd3 Nbd7 9.0-0 Nc5 10.Ne5; B) 5.Nf3 B1) 5...Nf6 6.a4 (6.e3 Bb7 7.a4 Bd6 8.Bd3 Nbd7 9.Nd4 Nc5 10.0-0) 6...Bb7 7.e3 Bd6 8.a5 0-0 9.Bd3 c6 10.bc6; B2) 5...ab5 6.Nb5 Nc6 7.Ne5 Bb7 8.e3 Nf6 9.Qf3 Be7 10.Bd3; B3) 5...Bb7 6.a4 (6.e3 Nf6 7.Nd4 Bd6 8.Bd3 c5 9.bc6 Nc6 10.0-0; 6.ba6 Na6 7.e3 Nf6 8.Ne5 c6 9.Bd3 Bd6 10.f4) 6...Nf6 7.e3 Bd6 8.Be2 0-0 9.0-0 Nbd7 10.a5; C) 5.a4 d4 6.Nb1 ab5 7.ab5 Ra1 8.Ba1 Nf6 9.Nf3 c5 10.Na3; D) 5.e4 D1) 5...d4 6.Nce2 c5 7.Nf4 Nd7 8.Ngh3 Ngf6 9.ba6 Bd6 10.c3; D2) 5...c6 6.Nf3 (6.ed5 ed5 7.a4 Nf6 8.Nf3 Bd6 9.Be2 0-0 10.0-0; 6.Bd3 ab5 7.ed5 b4 8.Nce2 ed5 9.Nf3 Nf6 10.Ned4) 6...ab5 7.ed5 ed5 8.Bd3 b4 9.Ne2 Nf6 10.Ned4; D3) 5...de4 6.Ne4 Bb7 7.Qf3 Qd5 8.Bd3 ab5 9.Ne2 Nc6 10.Qg3; D4) 5...Nf6 6.ed5 (6.e5 Ne4 7.Ne4 de4 8.Qg4 Bb7 9.Nh3 h5 10.Qg5) 6...ed5 7.Nf3 Bd6 8.Bd3 0-0 9.0-0 Nbd7 10.Re1.

4.Nc3 d4 5.Nb1 (5.Ne4 f5 6.Ng3 f4 7.Nh5 Qh4 8.e3 fe3 9.Ng3 Bb4 10.fe3) A) 5...Bc5 6.Nf3 (6.c3 Nf6 7.Nf3 dc3 8.Nc3 a6 9.d4 Be7 10.a4; 6.e3 Bb7 7.Nf3 de3 8.fe3 Nf6 9.Nc3 0-0 10.Be2) 6...Nf6 7.c3 dc3 8.Nc3 Bb7 9.d4 Be7 10.e3; B) 5...c5 6.e3 (6.Nf3 Nf6 7.e3 Nbd7 8.Na3 Bb7 9.Nc4 Qc7 10.Be2; 6.Na3 Nf6 7.Nf3 Bb7 8.e3 Nbd7 9.Nc4 Qc7 10.Be2) 6...de3 7.Qf3 ef2 8.Kf2 Qd5 9.Bd3 Nf6 10.Bf6; C) 5...Nf6 6.Nf3 Bb7 7.Nd4 Bc5 8.e3 0-0 9.Be2 a6 10.Bf3.

4.Nc3 Nd7 A) 5.h3 A1) 5...Ngf6 6.Nf3 (6.e3 Bd6 7.Nf3 0-0 8.Be2 a6 9.0-0 Bb7 10.ba6) 6...Bd6 7.e3 0-0 8.Be2 a6 9.0-0 Bb7 10.ba6; A2) 5...d4 6.Nb1 Ngf6 7.Nf3 Bb7 8.Nd4 Bd6 9.Nc3 0-0 10.e3; A3) 5...a6 6.Nf3 (6.a4 Ngf6 7.Nf3 Bb4 8.e3 0-0 9.Nd4 Bc3 10.Bc3; 6.e3 Bd6 7.Nf3 Ngf6 8.a4 0-0 9.Be2 Bb7 10.a5) 6...ab5 7.Nb5 Ngf6 8.e3 Bb7 9.c4 c6 10.Nbd4; A4) 5...Bd6 6.e3 (6.Nf3 Ngf6 7.e3 0-0 8.Be2 Bb7 9.0-0 a6 10.ba6) 6...Ngf6 7.Nf3 0-0 8.Be2 Bb7 9.0-0 a6 10.ba6; B) 5.Nf3 B1) 5...Bb7 6.e3 (6.Nd4 Ngf6 7.e3 Nc5 8.Be2 Bd6 9.f4 0-0 10.0-0; 6.a4 Ngf6 7.e3 Bb4 8.Be2 0-0 9.0-0 Qe7 10.Nd4) 6...Ngf6 7.Bd3 Bd6 8.0-0 Nc5 9.Qe2 0-0 10.a4; B2) 5...Ngf6 6.Nd4 (6.h4 Nc5 7.Nd4 Bb7 8.e3 Bd6 9.Nc6 Bc6 10.bc6) 6...Bb7 7.e3 Nc5 8.Be2 Bd6 9.0-0 0-0 10.f4; C) 5.f4 C1) 5...a6 6.Nf3 (6.e3 Ngf6 7.Nf3 Bd6 8.Bd3 e5 9.fe5 Ne5 10.Ne5) 6...ab5 7.Nb5 Ngf6 8.e3 Be7 9.Nbd4 0-0 10.Bb5; C2) 5...d4 6.Nb1 (6.Na4 a6 7.c4 Nc5 8.Nf3 ab5 9.Nc5 Bc5 10.e3; 6.Ne4 Nc5 7.Nf2 Na4 8.Qc1 Ne7 9.Nf3 c5 10.bc6) 6...Bc5 7.Nf3 Ngf6 8.Bd4 Bd4 9.Nd4 Ne4 10.g3; C3) 5...Be7 6.Nf3 (6.e3 Ngf6 7.Nf3 0-0 8.Bd3 a6 9.a4 ab5 10.ab5; 6.a4 d4 7.Ne4 Ngf6 8.Nf2 Nh5 9.Nf3 Nf4 10.Bd4) 6...Ngf6 7.e3 0-0 8.Bd3 a6 9.a4 ab5 10.ab5; C4) 5...Ngf6 6.Nf3 (6.e3 a6 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Bb7 10.a4) 6...Be7 7.e3 a6 8.a4 0-0 9.Bd3 Nc5 10.0-0; D) 5.e3 D1) 5...Ngf6 6.Bd3 (6.Nf3 Bd6 7.g3 0-0 8.Bg2 a6 9.a4 e5 10.d3; 6.Be2 Bd6 7.f4 a6 8.Nf3 Bb7 9.0-0 0-0 10.Qe1) 6...Bd6 7.Nf3 Nc5 8.0-0 Bb7 9.Nd4 0-0 10.f4; D2) 5...Bb7 6.f4 (6.Nge2 Ngf6 7.Nd4 Bd6 8.Be2 Nc5 9.f4 0-0 10.0-0; 6.Nf3 Ngf6 7.Bd3 Bd6 8.h3 0-0 9.0-0 Nc5 10.Be2) 6...Ngf6 7.Nf3 Nc5 8.Be2 Be7 9.0-0 0-0 10.a4; D3) 5...Bd6 6.Nf3 (6.Bd3 Ngf6 7.Nf3 Nc5 8.Nd4 e5 9.Nc6 Qd7 10.Be2; 6.Qg4 h5 7.Qh3 Ngf6 8.Nf3 Nc5 9.Be2 0-0 10.0-0) 6...Ngf6 7.Be2 0-0 8.0-0 Bb7 9.Nd4 Nc5 10.f4; E) 5.g3 E1) 5...Bb7 6.Nf3 (6.Bg2 Ngf6 7.Nh3 Ne5 8.0-0 Bd6 9.d3 0-0 10.Ng5) 6...Ngf6 7.Bg2 d4 8.Na4 a6 9.Bd4 ab5 10.Nb2; E2) 5...a6 6.Nf3 (6.Bg2 ab5 7.Nb5 Ngf6 8.Nf3 Bc5 9.a4 Bb7 10.0-0; 6.e3 Ngf6 7.Nf3 Bd6 8.Bg2 0-0 9.0-0 Bb7 10.a4) 6...ab5 7.Nb5 Ngf6 8.Bg2 Bc5 9.0-0 0-0 10.a4; E3) 5...Bd6 6.Nf3 (6.Bg2 Ngf6 7.Nf3 Bb7 8.e3 0-0 9.0-0 a6 10.Qe2; 6.Bh3 Ngf6 7.Nf3 0-0 8.0-0 Bb7 9.d3 a6 10.Qd2) 6...Ngf6 7.Bg2 0-0 8.0-0 Bb7 9.d3 e5 10.e3; E4) 5...Ngf6 6.Bg2 (6.Nf3 Bb7 7.e3 Bd6 8.Bg2 0-0 9.0-0 a6 10.Qe2; 6.e3 Bd6 7.Nf3 0-0 8.Bg2 a6 9.0-0 Bb7 10.Qe2) 6...Bb7 7.Nh3 Bd6 8.d4 0-0 9.0-0 a6 10.a4.

4.d4 Qd7 5.e3 a6 6.Nc3 Bb4 7.a4 ab5 8.ab5 Ra1 9.Qa1 Bc3? (better is 9...c5=) 10.Bc3+- Bb7 11.Nf3 h6 12.Ne5 Qc8 13.Be2 Ne7 14.Bb4 Nd7 15.0-0 Ne5 16.de5 c5 17.Bd2 (better is 17.bc6!? Qc6 18.Qa3+-) 17...Ng6 18.Qa7 (18.Qb2!?+=) 18...Qc7= 19.f4 0-0 20.Qa2 c4 (20...d4 21.ed4 Nh4 22.Rf2 cd4 23.Qc4+=) 21.Bb4 Ra8 22.Qb2 Rd8 23.c3 Bc8 24.Qc2 Bd7 25.e4 (25.Qa4!?+/–) 25...de4= 26.Qe4 Bb5 27.Rb1 Rd2 28.Bd6 Qd7 29.Bc4?? (better is 29.g3=) 29...Bc4-+ 30.Qc4 (30.Qe3 Re2 31.Qb6 Nf4 32.Kh1-+) 30...Rd5 (better is 30...Qb7 31.Qf1 Nf4-+) 31.Rb6 Kh7 32.Rb1 Nh4 (32...Qa7!? 33.Kh1 Rd2+=) 33.Qe4 Nf5 34.g4 g6?? (34...Qa7 35.Kh1 Rd2+=) 35.gf5+- Qa7 36.Kf1 (better is 36.Kh1!? gf5 37.Qg2 Qe3+-) 36...gf5 37.Qg2 (37.Qg2 Qe3 38.Qg3+-) 1–0. parducgaloca (2610) – beammeupscotty (2245), net–chess.com, 2014.

4.e3 c5 5.c4 Nf6 6.Nf3 Be7 7.Be2 Nbd7 8.0-0 Bb7 9.d4 0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.d4 Nbd7).

4.Nf3 a6= 5.e3 A) 5...Nf6 A1) 6.Ne5 Bd6 (6...Be7 7.Qf3 0-0 8.Nc3 Bb7 9.a4 Nbd7+=; 6...Bb7 7.ba6 Ba6 8.Ba6 Na6 9.0-0 Bd6=) 7.Qf3 Bb7 8.Nc4 Be7 9.Ne5 0-0+=; A2) 6.a4 Bd6 (6...c6 7.Be2 Bd6 8.0-0 0-0 9.Ne5 Bb7=) 7.Be2 0-0 8.0-0 Bb7 9.Ne5 c6=; B) 5...ab5 6.Bb5 c6 (6...Bd7 7.Be2 Nf6 8.0-0 Bc5 9.Ne5 0-0=) 7.Be2 Nf6 8.0-0 Bd6 9.Be5 0-0+=.

4.Nf3 Be7?? 5.Bg7+- Bf6 6.Bh8 Bh8 7.d4 Bb7 8.e3 Nd7 9.c4 Qf6 10.cd5 Bd5 11.Qc2 Bf3 12.gf3 Qf3 13.Rg1 0-0-0 14.Bg2 (14.Nd2 Qh5+-) 14...Qh5 15.Qc6 Ne5 (15...Nb8 16.Qb7 Kd7 17.Nc3+- (17.Qa7 Qh2 18.Bc6 Nc6 19.bc6 Kc6+/–)) 16.Qb7 Kd7 17.Bc6 (17.de5 Qe5 18.Bc6 Kd6 19.Qa7 Qa1 20.Qa3 Ke5+-) 17...Kd6 18.Nc3 (18.de5 Qe5 19.Rg8 Rg8 20.Qa7 Rg1 21.Ke2 Qh5 22.Kd3 Ba1 23.Nd2-/+) 18...Nd3 19.Kd2 Nc5?? (19...Nf2 20.Rg2 Qf5+-) 20.dc5 Ke5 (20...Kc5 21.Kc2 Bc3 22.Kc3 Qe5 23.Kc2 Qf5 24.Kc1 Qf6 25.Rg5 Qg5+=) 21.Ke1 bc5 (21...Kf5 22.Be4 Kf6 23.Qc7+-) 22.Qc7 (22.Qc7 Rd6 23.Ne4 Qh4 24.Qd6 Kf5 25.Qc5 Be5 26.Nd6 Kf6 27.Ne8 Kf5 28.Qc2 Qe4 29.Be4) 1–0. Taulien,Hans_Juergen – Neffgen,Dieter, remoteschach.de, 2002.

5.e3 c5 6.d4 c4 7.c3 Nf6 8.Nd2 Ne4 9.Nc4 dc4 10.Qf3 Nf6 11.Qa8 Nbd7 12.Qf3 Be7 13.Bc4 0-0 14.Bd3 Qc7 15.e4 Bb7 16.e5 Bf3 17.ef6 Bf6 18.gf3 e5 19.de5 Ne5 20.Be4 Re8 21.Ne2 Nc4 22.0-0 Nb2 23.Rab1 Nc4 24.Rbc1 Nd2 25.Rfd1 Ne4 26.fe4 Be5 27.Kf1 Qe7 28.Rd3 Qf6 29.Ng3 h6 30.Re1 Bc3 31.Re2 Be5 32.Rde3 Re7 33.f4 Bf4 34.Rf3 Qg5 35.Ref2 Bg3 36.hg3 f6 37.Kg2 Qg6 38.Rf5 Qf7 39.R5f3 Re5 40.Rf4 Qe6 41.R4f3 Re4 42.Rf4 Re2 43.R4f3 Rf2 44.Kf2 Qe4 45.Re3 Qc2 46.Kf3 Qa4 47.Re2 Qb5 48.Kf2 Qc6 49.Re3 b5 50.Rd3 Qb6 51.Re3 Kh7 52.Kf3 Qe3 53.Ke3 a4 54.Kd3 a3 55.Kc2 a2 56.Kb2 b4 57.Ka1 Kg6 58.Kb2 Kg5 59.Ka1 Kg4 60.Kb2 Kg3 61.Ka1 Kg4 62.Kb2 h5 63.Ka1 h4 64.Ka2 h3 65.Kb3 h2 66.Kb4 g6 67.Kc4 f5 68.Kb5 h1Q 69.Kc4 ½-½. TimC (2395) - OldTimes (2300), Rated Bullet game, lichess.org.

5.e3 Be7?? 6.Nf3?? (better 6.Bg7 Bf6 7.Bh8 Bh8 8.d4+-) 6...Nf6= 7.d4 0-0 8.Be2 Bb7 9.0-0 c5 10.c4 dc4 (10...Nbd7 11.Nbd2=) 11.Bc4 (11.dc5 Bc5 12.Nbd2 Nbd7=) 11...cd4 12.Nd4 Bb4 13.Be2 (13.Qe2 Qe7+=) 13...Ne4 14.Bf3 f5?? (better 14...Qh4=) 15.Ne6+- Qd1 16.Rd1 Rc8 17.Nd4 (better 17.Ng7!? Rf8 18.Be5+-) 17...g6 18.g4 (18.Nd2 Bd5+-) 18...fg4+- 19.Bg4 Re8 20.Bf3 (20.Ne6 Bc8 21.Nc7 Bg4+-) 20...Nd7+- 21.Nc6 Ndc5 22.Na3 (22.Bd4 Rac8 23.Be2 Kf8+-) 22...Ba3?? (better 22...Na4 23.Bd4 Nac3 24.Bc3 Nc3=) 23.Ra3+- Bc6 (23...Rac8 24.Bg4 Rc7 25.Be2+-) 24.bc6 Rac8 25.Bd4 (better 25.Be2+-) 25...Rc6+= 26.Bc5 Rc5 27.Rb3 Nc3 28.Rd4 (better 28.Ra1=) 28...Rec8 (better 28...Rb8=) 29.Rb6+- R8c7 30.h4 Rc4 31.Rb8 (31.Rc4!? Rc4 32.Rc6 Rc6 33.Bc6+-) 31...Kg7+= 32.Rb7 (better 32.Ra8!? Rd4 33.ed4+-) 32...Ne2=+ 33.Be2 Rc1 34.Kg2 Rb7 35.Bb5 Ra1 36.Rd5 Ra2 37.Kg3 Rf7 Attacking the backward pawn on f2 38.f3 Ra3 39.Re5 Kf6 40.Kf4 h6 41.Rc5? (better 41.Re8!?-/+) 41...Kg7-+ 42.Kg3 (42.Ke4 Re7 43.Kf4 Ree3 44.Rc7 Kf6 45.Rc6 Kf7 46.Rc7 Ke6 47.Rc6 Kd5 48.Rg6 Rf3 49.Kg4 Rg3 50.Kh5 Rg6 51.Kg6 Rb3-+) 42...Re3 43.Bc6 Ra7 (43...Rc7!? 44.Rc2-+) 44.Kf4 (44.Be4!?-/+) 44...Ra3-+ 45.Ke5 Ra6 46.Kd6?? (better 46.Rc4-+) 46...Ra4 47.h5 (47.Kc7 Rb4 48.Bb5 Rf6-+) 47...g5 (47...Rf4!? 48.Kc7 Rf7 49.Kb8 gh5 50.Rc4-+) 48.Kc7 (48.Ke5 Rb4-+) 48...Rb4 49.Re5 (49.Bb5 Rf6 50.Be8 Rf8-+) 49...a4 (better 49...Rc4 50.Kd7 Rac6 51.Ra5-+) 50.Re7 (50.Bd5-+) 50...Kf6 51.Rh7 (51.Re2 Rc4 52.Kd6 Rcc6 53.Kd5 a3-+) 51...a3 (better 51...Ra7 52.Kd6 Rh7 53.Kc5-+) 52.Rh6 Ke5 (52...Ke5 53.Rg6 Ra7 54.Kc8 a2 55.Rg5 Kd6 56.Rg6 Kc5-+) 0–1. BeepBeepImAJeep (2580) – NoView (2320), lichess.org, 2018.

5.e3 c6 6.Nf3 cb5 7.ab5 Nd7 8.c4 Ndf6 9.Be2 dc4 10.Bc4 Ne7 11.0-0 Ned5 12.d4 Bb4 13.Nbd2 Bd2 (13...Qd6 14.e4 Bd2 15.Nd2+-) 14.Qd2 0-0 15.Rac1 (15.Rfc1 Nc7+-) 15...Rc8 (15...a6 16.Bd3+=) 16.Ne5 (16.Bd3 Nc7+-) 16...Qe7 (16...Ne4 17.Qe2+=) 17.Qd3+- Nb4? (better 17...Nd7+-) 18.Qb3+- Nbd5 19.Ba3 Qd8 20.Bf8 Qf8 21.Be2 Rc1 (21...Ra8 22.Ra1+-) 22.Rc1 Ne4 23.Bf3 (23.Bd3 Nd6+-) 23...f6 (23...Nd6 24.Nc6+-) 24.Be4 fe5 25.de5 Qe7 (25...Qb8 26.Bd5 Bd5 27.Qc3+-) 26.g3 (26.Ra1 Qc7 27.Qc2 Qe5 28.Ra7 Ne3 29.Bh7 Kh8 30.fe3 Qe3 31.Qf2 Qc1 32.Qf1 Qe3 33.Kh1 Bg2 34.Qg2 Qc1 35.Qg1 Qg1 36.Kg1 Kh7+-) 26...Qg5 27.f4 Qe7 (27...Qd8 28.Qd3 h6 29.f5 ef5 30.Bd5 Bd5 31.Rd1+-) 28.Qd3 (better 28.Bd5 Bd5 29.Rc8 Kf7+-) 28...Qb4 (28...g6 29.Bd5 ed5 30.Qc2+-) 29.f5 Qb2 (29...Kf7 30.f6 Nf6 31.Bb7+-) 30.Rc2 (30.Rd1 Qe5 31.fe6 Qe6 32.Bd5 Qd5 33.Qd5 Bd5 34.Rd5 h5+-) 30...Qb1 (30...Qa1 31.Kf2 Qe5 32.fe6 Qf6 33.Kg1 Qa1 34.Kg2 Qe5+-) 31.Kg2 (better 31.Kf2 Qb4 32.fe6 Qf8 33.Kg1+-) 31...Nb4?? (better 31...Qc2! 32.Qc2 Ne3 33.Kf2 Nc2 34.Bc2 ef5 35.Bf5 a6+=) 32.Rc8! Bc8 33.Qb1 (33.Qb1 Nd5 34.Qd3 Ne3 35.Qe3+-) 1–0. BeepBeepImAJeep (2645) – theo91192 (1990), lichess.org, 2017.

5.e3 c6 6.Nf3 Nd7 7.c4 Be7?? 8.Be2?? (better 8.Bg7 Bf6 9.Bh8 Bh8 10.d4+-) 8...Bf6 9.d4 (9.cd5 Bb2 10.Ra2 cb5 11.de6 fe6 12.Rb2 ba4 13.Qa4 Ngf6=) 9...dc4 (9...Ne7 10.a5=) 10.Bc4 (10.Nbd2 Rc8 11.Nc4 Qc7+=) 10...Ne7= 11.0-0 c5 12.Nbd2 cd4 (12...Rc8 13.Rc1=) 13.Nd4 0-0 14.Be2 (14.Qh5 Ne5 15.Rac1 Nc4 16.Nc4 Rc8=) 14...Nc5 15.Bf3 (15.Qc2 Rc8=) 15...Nd5 (15...Bf3 16.N2f3 (worse 16.Qf3 e5-/+) 16...e5 17.Nc2=) 16.Nc4 White prepares the advance a5 16...Qe7 (16...Rc8 17.e4 Nc3 18.Bc3 Ne4 19.Be4 Be4 20.Nc6 Bc6 21.Qd8 Bd8 22.Nd6+- (worse 22.bc6 Rc6 23.Bb4 Rc4 24.Bf8 Kf8=+)) 17.a5 (17.e4 Bd4 18.Bd4 Nb4+=) 17...Nb4 (17...Rad8 18.ab6 ab6 19.Ra7+=) 18.ab6 Bf3? (better 18...ab6 19.Nb6 Ra1 20.Ba1 Rb8+=) 19.Qf3+- (19.gf3?! ab6 20.Ra8 Ra8 21.Nb6 Rd8=+) 19...Bd4 (19...Rfc8 20.Bc3 Nd5 21.Nc6+-) 20.Bd4 (20.ed4!? Ncd3 21.Ba3 Qh4+-) 20...Nc2 21.Ra7 Nd4?? (better 21...Ra7 22.ba7 Qa7+-) 22.ed4 (22.Re7?! Nf3 23.gf3 Rab8+-) 22...Ra7 23.ba7 (23.dc5?! Rd7 24.c6 Rd5+-) 23...Nb7 (23...Qa7 24.dc5 Qc5+-) 24.Nb6 (24.Ra1 g6+-) 24...Nd6 (24...h6 25.Ra1 Kh7 26.Qe4 g6 27.a8Q Ra8 28.Ra8+-) 25.a8Q (25.a8Q Ra8 26.Qa8 Qf8 27.Qc6+-) 1–0. BeepBeepImAJeep (2700) – Mahdi2009 (2435), lichess.org, 2020.

5.e3 Nd7 6.Nf3 f6 7.c4+= g6 (7...Ne7 8.a5+=) 8.Be2 Bg7 (8...dc4 9.Bc4 a6 10.Be6+=) 9.0-0 Ne7 10.d4 dc4 (10...c5 11.bc6 Bc6 12.Nc3+=) 11.Bc4+- Bf3 (better 11...e5!?+-) 12.Qf3+- (12.gf3?! e5+=) 12...Rb8 (better 12...Nf8+-) 13.Be6 Nf5 (13...f5+-) 14.Bf5 gf5 15.Qh5 Ke7 (15...Kf8 16.Rc1+-) 16.Qf5 (better 16.Ba3 Nc5 17.dc5+-) 16...Nf8 (16...Qe8 17.Nc3 Qg6 18.Nd5 Kd8 19.Qf4+-) 17.Ba3 Kf7 18.Nc3 Ne6 (18...Qd7 19.Qd7 Nd7 20.Nd5+-) 19.Ne4 (19.Nd5 c5 20.bc6 Re8+-) 19...Re8 (19...h6 20.Rfc1+-) 20.Rac1 (better 20.Qh7 Qd5 21.Nc3+-) 20...Qd7 (20...Kg8 21.Rc6 Qd7 22.d5+-) 21.Rc6 (better 21.Ng5 Ng5 22.Qd7 Kg6 23.Rc7+-) 21...Qd5 (21...Kg8+-) 22.Qd5 (22.Rc7! Qd7 23.Rd7 Re7 24.Re7 Kg8 25.Qe6 Kh8 26.Re8 Bf8 27.Qf6 Kg8 28.Qf8) 22...Rbd8+- 23.Qf5 Bf8 24.Re6! Re6 (24...Re6 25.Ng5 Mate attack) 25.Ng5 Ke8 26.Qe6 Be7 27.Qe7 1–0. BeepBeepImAJeep (2610) – Guillaume01, lichess.org, 2016.

5.e3 Be7 6.c4 Nf6 7.Nf3 dc4 8.Be2 Nbd7 9.Bc4 Nc5 (9...c6 10.0-0=) 10.Be2 (10.d4 Nce4=) 10...0-0 (10...Nd3 11.Bd3 Qd3 12.Qe2=+) 11.0-0 Qd7 (11...Nd3!?=) 12.d4+= Nce4 13.Nbd2 (13.Ne5 Qd8+=) 13...Nd2 (13...c5 14.Ne4 Be4 15.Ne5=) 14.Qd2 Bd5 (14...c5!?=) 15.Ne5+- Qe8 16.Bf3 (16.Rfc1 Bd6+-) 16...Bf3+= 17.Nf3 Nd7 (17...a6 18.Qe2+=) 18.Qc2 Rc8 19.Qc6 Nf6 (19...Bd6 20.e4+=) 20.Ne5 Qc6 (20...Qd8 21.Qb7 Qd5 22.Qd5 (22.Qa7?! Bd6 23.Nc6 Qb3=) 22...ed5 23.Nc6+-) 21.Nc6+- (21.bc6?! Rfd8+=) 21...Bd6 22.f3 (22.Na7 Ra8 23.Nc6 Rfe8+-) 22...Ra8 (22...Nd5!? 23.e4 Nb4+-) 23.e4+- Be7?? (better 23...Bf4+-) 24.Ne7 Kh8 25.Nc6 (25.Rfc1 a6 26.Rc7 Ng8+-) 25...Rfe8 (25...a6 26.Rfc1+-) 26.Kf2 (26.Rfc1 Nh5+-) 26...Nd7 (26...a6 27.Rfc1+-) 27.Ke3 Nb8 (27...Kg8 28.a5+-) 28.Nb8 (28.Rfc1 Nd7+-) 28...Rab8 29.Rac1 Rbc8 30.Rc6 Red8 31.Rfc1 Rd7 32.R1c4 Kg8 33.Bc3 (33.Ba3!? g5+-) 33...Kf8 34.a5 Ke8 (34...Rb8 35.Rc7 Rc7 36.Bb4 Kg8 37.Rc7 ba5 38.Ba5+-) 35.ab6 ab6 36.Rb6! Kd8 (36...cb6 37.Rc6 Double attack (37.Rc8 Pinning; 37.Rc8 Deflection; 37.Rc6 Decoy; 37.Rc8 Clearance)) 37.Rbc6 f6 (37...Rb8 38.R4c5 Ra8 39.d5 ed5 40.Bg7 de4 41.fe4+-) 38.Ba5 White plans b6 38...h5 (38...Ra8 39.Bc7 Kc8 40.b6+-) 39.b6 Rd6 (39...Ke7+-) 40.Rd6 cd6 41.b7 Kd7 (41...Ke8 42.bc8Q Kf7 43.Rc7 Kg6 44.Qh8 Kg5 45.Qg7 Kh4 46.Qf6) 1–0. BeepBeepImAJeep (2500) – ledize (1720), lichess.org, 2018.

5.g3 a6 A) 6.Bg2 c6 (6...Nf6 7.Nf3 Bd6 8.0-0 0-0 9.Na3 Qe7+=; 6...c5 7.Nf3 Nf6 8.0-0 Bd6 9.Na3 0-0+=) 7.Nf3 Nf6 8.0-0 Bd6 9.d3 ab5+=; B) 6.Nf3= c6 (6...Nf6 7.Bg2 Bd6 8.0-0 0-0 9.d3 Qe7+=; 6...c5 7.ba6 Na6 8.e3 c4 9.Bd4 Ne7+=) 7.Bg2 Nf6 8.0-0 Bd6 9.d3 ab5+=.

5.g3 Bb4?? 6.Bg2 (6.Bg7 a6 7.ba6 Na6 8.Bh8 Nf6+-) 6...Nd7?? (6...Nf6 7.Nf3=) 7.e3 (better is 7.Bg7 Ngf6 8.Bh8+-) 7...Ngf6= 8.Ne2 0-0 9.0-0 (9.Nd4 a6=) 9...Ne4 (9...c6 10.c4=) 10.d3 (10.Nd4 Qf6=) 10...Nef6 (10...Nd6 11.Nd4=) 11.Nbc3 (11.c4 a6+=) 11...Nc5 (11...a6!?=) 12.Na2 Ba5 13.c4 (13.Nac1 a6=) 13...dc4 14.Bb7 Nb7 15.dc4 Qd1 (15...Nd6 16.Qd4=) 16.Rad1 (16.Rfd1 Ne4+=) 16...Ng4 (16...Ne4!? 17.Ba3 Rfc8=) 17.h3 Nh6 18.Nd4 Rad8 (18...Nf5 19.Nf5 ef5 20.Rd5+/–) 19.g4 (19.Ba3 Rfe8 20.Nc6 Rd1 21.Rd1 Kh8+-) 19...Nd6 (19...Nc5 20.Ba3 Rd6 21.Nc1+-) 20.Nc6 Nc4 (better is 20...Rde8 21.Ba3 f5+-) 21.Bd4?? (better is 21.Nd8!? Nb2 22.Rd7+-) 21...Rd6 (21...Rd7 22.Rc1 Nd2 23.Rfd1+=) 22.Ne7 (better is 22.Rc1!? Nd2 23.Rfd1+/–) 22...Kh8= 23.Rc1 Nd2 24.Rfd1 Nf3 (better is 24...e5!? 25.Bb2 e4=) 25.Kg2+/– Nd4 26.ed4 (26.Rd4 Rd4 27.ed4 Ng8 28.Ng8 Kg8 29.Rc7 g5+/–) 26...Rfd8 (26...Rd7 27.Nc6+=) 27.Rc7+/– g6 (27...R6d7 28.Rd7 Rd7 29.Nc6+/–) 28.Nc6 (28.Ra7 R8d7 29.Rd7 Rd7+-) 28...R8d7 29.Rc8 (29.Ra7!? Ra7 30.Na7+/–) 29...Kg7 30.Nc1 Bc3? (30...Ng8 31.Nb3+/–) 31.Ne2 (better is 31.Ne5!? Bb4 32.Nd7 Rd7 33.Ne2+-) 31...Ba5+/– 32.Kf3 (32.Rc1+/–) 32...f5 (32...Ng8 33.Ne5 Ne7 34.Rc2+/–) 33.g5 (33.Ne5!? Re7 34.Rdc1+-) 33...Nf7+/– 34.Nf4 (better is 34.Kf4!?+/–) 34...Ng5 (better is 34...e5!? 35.Ne2 Ng5 36.Kg2 ed4 37.Rd4 Rd4 38.Ned4 Bc3-/+) 35.Ke3 e5 (35...Ne4 36.Ne5 g5 37.Ne2=) 36.Ne5+/– Re6?? (better is 36...Re7 37.Rg1 Ne4+=) 37.Ne6+- Ne6 38.Re8 (38.Nd7 f4 39.Ke2 Ng5+-) 38...Nc5 (38...Nc7+-) 39.Nd7 Nd7 (39...Ne4 40.Ra8 Nc3 41.Rc1 Nd5 42.Kf3+-) 40.Re7 Kf6 41.Rd7 Bb4 (41...h6 42.Rd6 Kg7 43.Rg1+-) 42.Ra7 (better is 42.Rc1!? f4 43.Ke4 f3+-) 42...Kg5 (42...h5 43.Rb7 g5 44.Rb6 Ke7 45.Rb1+-) 1–0. CrashTestDummy – bueno, Live Game Caissa's Web, 2005.

5.g3 c5 A) 6.Bg2 a6 (6...Nf6 7.Na3 a6 8.Nf3 Be7 9.0-0 0-0=) 7.Nf3 Nf6 8.0-0 Bd6 9.Na3 0-0+=; B) 6.Nf3 a6 (6...Nf6 7.Bg2 Bd6 8.0-0 0-0 9.Na3 a6+=) 7.ba6 Na6 8.e3 c4 9.Bd4 Ne7+=; C) 6.Na3 Nf6 (6...a6 7.Nf3 Nf6 8.Bg2 Be7 9.0-0 0-0=) 7.Bg2 Be7 8.Nf3 a6 9.0-0 0-0=.

5.g3 c6 A) 6.Nf3 a6 (6...Nf6 7.Bg2 a6 8.0-0 Bd6 9.Na3 0-0+=) 7.Bg2 Nf6 8.Be5 Bd6 9.ba6 Ba6+=; B) 6.Bg2 Nf6 (6...a6 7.Nf3 Nf6 8.0-0 Bd6 9.Na3 0-0+=; 6...Qd7 7.bc6 Nc6 8.Nf3 Rc8 9.0-0 Nf6+=) 7.Nf3 a6 8.0-0 Bd6 9.Na3 0-0+=.

5.g3 Nf6 A) 6.Nf3 a6 (6...Bd6 7.Bg2 0-0 8.0-0 a6 9.d3 c5+=) 7.Bg2 Bd6 8.0-0 0-0 9.Na3 Qe7+=; B) 6.Bg2 Bd6 (6...a6 7.Nf3 Bd6 8.0-0 0-0 9.d3 c5+=) 7.Nf3 a6 8.0-0 0-0 9.d3 c5+=.

5.e3 A) 5...Bd6 6.f4 (6.Bd3 Nbd7 7.Nf3 0-0 8.0-0 Nc5 9.Nd4 a6 10.f4; 6.Nf3 0-0 7.Be2 Nbd7 8.g3 a6 9.0-0 Bb7 10.a4) 6...0-0 7.Nf3 a6 8.Bd3 Nbd7 9.0-0 Nc5 10.Ne5; B) 5...Nbd7 6.f4 (6.Nge2 Bd6 7.Nd4 Bb7 8.Bd3 Nc5 9.0-0 0-0 10.f4; 6.Nf3 Bd6 7.g3 0-0 8.Bg2 a6 9.0-0 Bb7 10.Qe2) 6...Bd6 7.Nf3 0-0 8.Be2 a6 9.0-0 Bb7 10.Qe1; C) 5...Bb7 6.Nf3 (6.h3 Nbd7 7.Nf3 Bd6 8.Be2 0-0 9.0-0 a6 10.ba6; 6.a4 Nbd7 7.Nf3 Bb4 8.Be2 0-0 9.0-0 Nc5 10.Ne5) 6...Nbd7 7.Bd3 Bd6 8.Nd4 Nc5 9.0-0 0-0 10.f4.

5.Nf3 Bb7 (5...a6 6.a4 (6.e3 Bd6 7.a4 Bb7 8.a5 c6 9.bc6 Nc6 10.ab6) 6...d4 7.Nb1 ab5 8.ab5 Ra1 9.Ba1 Bc5 10.c3; 5...Bd6 6.e3 (6.g4 h6 7.Rg1 a6 8.e3 ab5 9.g5 hg5 10.Nb5; 6.g3 a6 7.a4 Bb7 8.e3 0-0 9.Bg2 Nbd7 10.0-0) 6...0-0 7.Be2 Nbd7 8.0-0 Bb7 9.Nd4 Nc5 10.f4; 5...Nbd7 6.Nd4 (6.e3 Bd6 7.d4 0-0 8.Bd3 e5 9.de5 Ne5 10.Ne5; 6.g3 Bb7 7.e3 Bd6 8.Bg2 0-0 9.0-0 a6 10.Qe2) 6...Bb7 7.g3 Bc5 8.e3 0-0 9.Be2 Ne5 10.0-0) 6.g3 (6.e3 Bd6= (6...Nbd7 7.Nd4 Bd6 8.Be2 0-0 9.0-0 Nc5 10.f4) 7.Bd3 Nbd7 8.0-0 Nc5 9.Nd4 a6 10.a4; 6.h4 Nbd7 7.e3 Bd6 8.Be2 0-0 9.0-0 Nc5 10.Ng5) 6...Nbd7 (6...d4 7.Na4 a6 8.c4-/+ (8.Bd4? ab5 9.Nc3 b4-+) 8...Qd6 9.a3 ab5 10.cb5) 7.Bg2 (7.e3 Bd6 8.Bg2 0-0 9.0-0 h6 10.Qe2) 7...d4 8.Na4 (8.Nb1 Ne5+= 9.0-0 Nf3 10.Bf3) 8...Nc5 (better is 8...a6!? 9.Bd4 ab5-/+ 10.Nb2; 8...Ne5 9.Ne5 Bg2 10.Rg1) 9.c3= (9.c4 a6 10.0-0) 9...Na4 (9...d3 10.Nc5 Bc5 11.0-0=) 10.Qa4+= dc3 11.Bc3 Be7 12.0-0 0-0 13.Ne5 Bg2 14.Kg2 Qd5 (14...a6 15.ba6 Qd5 16.Nf3+=) 15.f3 Nd7? (15...a6 16.Nc6 Bd6+/–) 16.e4+/– Nc5 (16...Qd6 17.Nc6 Rfe8 18.d4+/–) 17.Qc2+- (17.ed5?! Na4 18.Nc6 Bd6+=) 17...Qb7?? (better is 17...Qd8+-) 18.d4 f6 (18...a6 19.a4+-) 19.Nc6 (19.dc5?! fe5 20.c6 Qc8+-) 19...Bd6 20.dc5 bc5 21.Qb3 Rae8 (21...Rfe8 22.Na5 Qb8 23.Rab1+-) 22.Qa4 Ra8 23.f4 (23.Rfd1 Qb6 24.Ba5 Qb7+-) 23...f5 (23...a6 24.e5 ab5+-) 24.Qc4 fe4 25.Qe6 Kh8 (25...Rf7 26.Qd5 Qb5 27.Ne7 Be7 28.Qa8 Rf8 29.Qe4+-) 26.Rab1 (better is 26.f5 Qc8 27.Qd5 Rf6 28.Bf6 gf6+-) 26...Rae8 (26...Qc8 27.Qe4 Re8+-) 27.Qd7 e3 (27...Rg8 28.Bg7! Rg7 29.Qe8 Rg8 30.Qe4 Rf8+-) 28.Qg7 1–0. otto – perrerie, internet, 2011.

5.ba6 Nf6 6.h3 Ba6 7.Ba6 Ra6 8.Qe2 Ra8 9.Nf3 Be7 10.Nc3 0-0 11.0-0 c5 12.a4 A) 12...Nbd7 13.Nb5 (13.Rfb1 e5 14.d3 Ra5 15.Nb5 e4 16.Nd2=; 13.Rfd1 Bd6 14.Nb5 Qe7 15.d3 Rfd8 16.e4=; 13.e4 Ra5 14.ed5 ed5 15.Rfe1 Re8 16.Qd3+=) 13...c4 14.d3 Qc8 15.dc4 Qc4 16.Qc4=; B) 12...Nc6 13.Nb5 (13.Rfb1 Ra5 14.Nd1 Qd6 15.Bc3 Ra7 16.Qb5+=) 13...Qd7 14.Rfb1 Ra6 15.Ne5 Ne5 16.Be5=; C) 12...Ra5 13.Nb5 (13.Ne5 Nfd7 14.Nd7 Nd7 15.Rfb1 Bf6 16.d3+=; 13.Rfb1 Nc6 14.Nd1 Qd6 15.Bc3 Ra7 16.Bf6+=; 13.e4 Nc6 14.ed5 ed5 15.Nb5 Re8 16.Ne5=) 13...Nc6 14.Bc3 Ra8 15.d3 Qd7 16.Rfb1=.

5.ba6 Nf6 6.h3 Ba6 7.Ba6 Ra6 8.Qe2 Ra8 9.Nf3 Be7 10.Nc3 0-0 11.0-0 c5 12.Nb5 A) 12...Nc6 13.d3 (13.a4 Qd7 14.Rfb1 Ra6 15.Ne5 Ne5 16.Be5=) 13...Nb4 14.a3 Qd7 15.c4 dc4 16.dc4=; B) 12...Ra4 13.d3 Nc6 14.c4 Qa8 15.a3 Rd8 16.Rfd1=; C) 12...Na6 13.a3 (13.d3 Nb4 14.a3 Qd7 15.c4 dc4 16.dc4=; 13.Ne5 Ne4 14.d3 Nd6 15.a4 f6 16.Nc6=; 13.a4 c4 14.d3 cd3 15.cd3 Nc5 16.Qc2=) 13...Nc7 14.a4 Na6 15.Rfb1 Nb4 16.Bf6=; D) 12...Ra5 13.c4 (13.a4 Nc6 14.Bc3 Nb4 15.Bb4 cb4 16.Qd3=; 13.Bc3 Ra4 14.Rfb1 Nc6 15.d3 Qa8 16.Rb2=; 13.Rfb1 Nc6 14.Bc3 Ra4 15.d3 Qa8 16.Rb2+=; 13.Be5 Nbd7 14.Bc3 Ra4 15.Rfb1 Qa8 16.d3=) 13...dc4 14.Qc4 Qd5 15.Qd5 ed5 16.a4=.

5.ba6 Nf6 6.h3 Ba6 7.Ba6 Ra6 8.Qe2 Ra8 9.Nf3 Be7 10.Nc3 0-0 11.0-0 c5 12.d3 Qd7 (12...Ra5 13.Nb1 (13.Rfb1 Nc6 14.a4 Qd7 15.Nd2 Rfa8 16.Bc1+=; 13.a4 Nc6 14.Nb5 Qa8 15.Bc3 Nb4 16.Bf6+=; 13.Nd2 Qd7 14.Rfb1 b5 15.Nd1 d4 16.ed4+=; 13.Nd1 Nc6 14.c4 Qd7 15.e4 Rfa8 16.Ne5+=) 13...Nc6 14.c4 Qa8 15.Nc3 Rd8 16.Rfd1=; 12...Nc6 13.Nb5 Ra4 14.c4 Qa8 15.a3 Rd8 16.Rab1=; 12...Nbd7 13.a4 (13.Nb5 Ra4 14.c4 Qa8 15.Qc2 dc4 16.dc4=; 13.Rfd1 Ra5 14.Nd2 e5 15.Nb3 Ra8 16.Nb5=) 13...Ra5 14.Nd2 e5 15.Nb3 Ra6 16.d4=) 13.a3 (13.Ne5 Qc8 14.Nb5 Nbd7 15.c4 Ne5 16.Be5=) 13...b5 (13...Ra5 14.Rfb1 b5 15.Ne5 Qc7 16.d4+=) 14.Nd1 (14.Qd2 Bd8 15.Rfb1 Ra5 16.Nd1=) 14...c4 (14...Nc6 15.c4 bc4 16.dc4+=) 15.d4 (15.Nc3 Na6= 16.Rfb1+=) 15...Qd8 (15...Ne4 16.Ne5-/+) 16.c3 (better is 16.Nc3!? Qa5 17.Ne5+=) 16...Nbd7 17.g4 Ne4 18.Kg2 Bg5 (18...f5!? 19.Nd2-+) 19.Ng5 Qg5 20.f4 Qe7 21.a4? (21.Nf2!?-/+) 21...ba4 (21...Qh4 22.ab5 Ra1 23.Ba1 Qg3 24.Kh1 Qh3 25.Kg1-+) 22.Ba3 Qd8 (better is 22...Qh4 23.Rf3 Rfe8-+) 23.Bf8 Qf8 (23...Nf8 24.g5+=) 24.Ra2 Ndf6 25.g5 Ne8 26.Nf2?? (better is 26.Qc2=) 26...f6?? (better is 26...Nc3 27.Qb2 Na2 28.Qa2 Qb4-+) 27.Ne4+- de4 28.f5 (28.Qc4 Nd6 29.Qe6 Qf7 30.Qf7 Kf7+-) 28...Qf7 (28...Nd6 29.fe6 f5 30.Rfa1+/–) 29.Qg4 ef5 30.Qf5 g6 31.Qf6?? (better is 31.Qe4 Ra6 32.Qf4+-) 31...Nf6-+ 32.Rf6 (32.gf6 Qb7 33.Rff2 Qb3 34.f7 Kf8-+) 32...Qd7 33.Ra3 (33.Rff2 Ra5 34.Rf4 Rg5 35.Kh2 Qb5-+) 33...Rf8 34.Rf8 Kf8 35.h4 (35.Ra2 Qf5-+) 35...Kg7 (35...Qg4 36.Kf2 Qf3 37.Kg1 Qe3 38.Kg2 Qf3 39.Kh2 Qf2 40.Kh1 Qh4 41.Kg2 Qg5 42.Kh2 Qh4 43.Kg2 e3 44.Ra4 Qf2 45.Kh3 Qf3 46.Kh2 e2-+) 36.Kg3 (36.Ra2 Qg4 37.Kh2 Qh4 38.Kg2 Qg5 39.Kh2 Qe3 40.Ra4 Qd2 41.Kg1 Qd1 42.Kf2 Qa4-+) 36...h6 (36...Qd6 37.Kf2 Qa3 38.Kg2 Qc3 39.Kh2 Qd2 40.Kh3 Qe3 41.Kg2 c3 42.Kh2 c2 43.h5 c1Q 44.h6 Kf7 45.d5 Qcg1) 37.gh6 (37.Kf2 Qg4 38.Ke1 Qg1 39.Kd2 Qb1 40.Ra4 Qd3 41.Ke1 Qc3 42.Kf1 Qc1 43.Kf2 Qc2 44.Ke1 Qa4-+) 37...Kh6 38.Kf4 (38.Ra2 Kh5 39.Kf2 Qf5 40.Kg1 Qg4 41.Rg2-+) 38...Qf5 39.Kg3 Kh5 40.Ra4 Qf3 41.Kh2 Kh4 42.Rc4 (42.Ra2 Qg3 43.Kh1 Kh3 44.Re2 Qf3 45.Kg1 Qe2 46.d5 Qg2) 42...g5 (42...Qf2 43.Kh1 Kg3 44.Rc5 Qf1) 43.d5 (43.Rc8 Qf2 44.Kh1 Kg3 45.c4 Qg2) 43...g4 (43...Qf2 44.Kh1 Kg3 45.Re4 Qg2) 44.d6 (44.Re4 Qg3 45.Kh1 Kh3 46.Rg4 Qh2) 44...Qg3 45.Kh1 Kh3 46.Re4 0–1. MasterofDisaster – georgizz, Live Game Caissa's Web, 2004.

5.Nf3 c5 6.bc6 Nc6 7.Bb5 Qd6? (7...Bd7 8.c4 Nf6 9.0-0+=) 8.a4?? (better 8.Ne5! Bd7 9.Bc6 (9.Nd7?! Qd7 10.Nc3 Nf6+-) 9...Bc6 10.Nf7 Kf7 11.Qh5 g6 12.Qf3 Ke8 13.Bh8+-) 8...Ba6 (8...Bd7 9.c4+-) 9.Na3 (9.Qe2 Bb5 10.ab5 Nce7+-) 9...Bb5 10.Nb5 Qe7 (10...Qd8 11.0-0 Nf6 12.Bf6 gf6 13.Qe2+-) 11.0-0 (better 11.c4 Nf6 12.Ne5+-) 11...0-0-0? (better 11...Rc8!?+-) 12.Qe2 (better 12.Rc1 Nf6 13.Ne5 Ne5 14.Be5+-) 12...Qb4? (12...Nf6+-) 13.Na7!! Na7 14.Qa6 Kb8 (14...Kd7 15.Ba3 (worse 15.Qa7 Ke8 16.Rfb1 Qc5+-) 15...Qa3 16.Ra3 Ba3 17.Qa7 Ke8 18.Qb6+-) 15.Be5 (better 15.Ba3 Qc4 16.Qb6 Kc8 17.Rfb1+-) 15...Bd6?? (15...Ka8 16.Rfb1 Qc5 17.Rb6 Qc8 18.Qa5 f6+-) 16.Rfb1 Qc5 (16...Ka8 17.Rb4 Bb4+-) 17.Rb6 Ka8 (17...Qb6 18.Qb6 Kc8 19.Rb1 Kd7 20.Bd6 Ke8 21.Ne5 Rc8 22.Qa7 Rc7 23.Rb8 Rc8 24.Rc8) 18.Qb7 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.a4 Bd7 6.c4 c6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Nf6 10.Qa4 cb5 11.cb5 Bc5 (11...Bd6 12.Be5 Be5 13.Ne5=) 12.Be5+= 0-0 13.Qa7 Ne4 14.Bb8 (14.Nc3!? Nd6 15.Qa4=) 14...Qb8=+ 15.Qb8 Rb8 16.Ne5 (16.Bd3 Rc8 17.Ke2 Bb4-/+) 16...Be8 17.Bd3 Bd6 18.Be4 (18.f4 Be5 19.fe5 Rc8-/+) 18...Be5 (18...de4!? 19.Nc4 Bb4 20.Nc3-/+) 19.Bd3 Rc8 20.0-0 (20.Ke2!?-/+) 20...Rc5 21.Na3 g6 (21...Bb2!? 22.Nc2 Bb5 23.Bb5 Rb5-/+) 22.Rb1=+ Bf6 23.Be2 d4 (23...e5 24.Kf1-/+) 24.e4 Be7 25.Nc4 (25.Bd3!?=+) 25...Bb5 26.Rb5?? (better 26.d3-/+) 26...Rb5-+ 27.f3 (27.g3 Rb3-+) 27...Rb1 28.Kf2 Bc5 (28...b5 29.Na5-+) 29.d3 (29.Bd3 Rh1-+) 29...Rh1 (29...b5 30.Ne5 b4 31.Nc4-+) 30.Kg3 (30.h3 b5 31.Nd2 Bd6-+) 30...Re1 (30...b5 31.Na5-+) 31.Kf2 Ra1 32.h3 (32.f4 b5 33.Nd2 Bb4-+) 32...h5 (better 32...b5!? 33.Ne5-+) 33.f4 Kf8 (33...b5 34.Nd2 Bb4 35.Nf3-+) 34.g4 (34.g3 b5 35.Nd2 Bb4-+) 34...h4 (34...hg4 35.hg4 b5 36.Nd2-+) 35.g5 (35.Nd2 Bb4 36.Nf3 Bc3-+) 35...Ke7 (35...Bb4 36.Nb6 Bd2 37.f5 Be3 38.Kg2 gf5 39.ef5 ef5 40.Nd5 Rg1 41.Kh2-+) 36.Kf3 (36.Nd2 Bb4 37.Nf3 Bc3-+) 36...Rg1 (36...b5 37.Nd2 Bb4 38.Nb3-+) 37.Kf2 (37.Nd2 Bb4 38.Kf2 Ra1-+) 37...Rg3 (better 37...Rc1-+) 38.f5 (38.Nd2 Rh3 39.Nf1-+) 38...ef5 39.ef5 gf5 0-1. mitkosto - royalbank (1690), Rated Classical game, lichess.org, 2013.

7.Ba1 Bb7 8.Nf3 Nf6 9.Be2 h6 10.c4 dc4 11.Bc4 Bd5 (better 11...Bd6!?=) 12.Bf6+= Qf6 (12...gf6!? 13.Bd5 Qd5+-) 13.Bd5+- ed5 14.Nc3 Qd8 15.Qb3 c6 (better 15...Bd6+-) 16.bc6 Nc6 17.Nd5 Na5? (17...Bc5+-) 18.Qa4 Qd7 19.Qe4 Be7 20.Ne5 (20.Qe7?! Qe7 21.Ne7 Ke7+-; 20.Ne7?! Qe7 21.Qa4 Qd7+-) 20...Qe6 (20...Qb7 21.Ke2 0-0+-) 21.Nc7 Kf8 22.Qa8. Human – Human, Chess Game, 2019.

8.Nf3 Nf6 9.Be2 Bb4 10.0-0 h6 11.Ne5 Rg8 12.Bb2 A) 12...Bd6 13.c4 (13.d4 c6 14.c4 dc4 15.Nc4 Bc7 16.Ne5+/–; 13.Nd7 Nbd7 14.f4 g5 15.f5 e5 16.c4+=; 13.f4 c5 14.c4 Qc7 15.d3 Bc8 16.Nd2+=; 13.Na3 c5 14.c4 Bc8 15.f4 Bb7 16.d3+=) 13...c6 14.Na3 Qe7 15.Qa4 cb5 16.Nb5+/–; B) 12...c5 13.c4 (13.c3 Ba5 14.c4 Bc8 15.d4 Bb7 16.Qc2+/–) 13...dc4 14.Bc4 Ne4 15.Bc3 Bc3 16.Nc3+/–.

8.Nf3 Nf6 9.Be2 Bb4 10.0-0 h6 11.Ne5 Rg8 12.Bc3 A) 12...Be7 13.Nd7 (13.f4 c6 14.f5 ef5 15.Nc6 Nc6 16.bc6+=; 13.Bb2 c5 14.c4 Bc8 15.d4 Bd6 16.Nd2+/–; 13.Bd4 c5 14.bc6 Nc6 15.Nd7 Nd7 16.Bb2+=; 13.Bd3 c6 14.Nd7 Qd7 15.f4 c5 16.f5+=) 13...Nbd7 14.Bb2 Nc5 15.c4 Qd7 16.cd5+/–; B) 12...Bd6 13.Bb2 (13.f4 c5 14.bc6 Nc6 15.Nd7 Nd7 16.Bb2+=; 13.Nd7 Nbd7 14.f4 g5 15.f5 e5 16.Bb2+=; 13.f3 c5 14.f4 Qc7 15.Bb2 c4 16.Nd7+=) 13...c5 14.c4 Qc7 15.f4 Bc8 16.Na3+=.

8.Nf3 Nf6 9.Be2 Bb4 10.0-0 h6 11.Ne5 Rg8 12.Nc3 A) 12...c5 13.Na2 (13.bc6 Nc6 14.Nd7 Qd7 15.Bb2 Bc3 16.Bc3+=) 13...Ba5 14.c4 dc4 15.Bc4 Qc7 16.d4+/–; B) 12...Bd6 13.f4 (13.Nd7 Nbd7 14.f4 g5 15.f5 e5 16.Qb1+=) 13...c5 14.bc6 Nc6 15.Nb5 Be7 16.f5+/–; C) 12...c6 13.Nd7 (13.f4 cb5 14.Nd7 Nbd7 15.Bb5 Qc7 16.Be2+=; 13.Bb2 c5 14.Na2 Ba5 15.c4 dc4 16.Bc4+/–; 13.bc6 Nc6 14.Nd7 Qd7 15.Bb5 Qc7 16.Ba4+=; 13.f3 Qc7 14.Nd7 Nbd7 15.bc6 Qc6 16.Bb5+=) 13...Qd7 14.f4 Kd8 15.Bb2 Bc5 16.Qa1+/–.

8.Nf3 Nf6 9.Be2 Bb4 10.0-0 h6 11.Ne5 Rg8 12.c4 dc4 (12...Bd6 13.d4 (13.Qb3 Bc8 14.d4 Bb7 15.Nc3 Rf8 16.Rc1+/–; 13.d3 c6 14.bc6 Nc6 15.Nd7 Qd7 16.Bf6+/–; 13.Qc2 c6 14.cd5 cd5 15.Rc1 Ne4 16.d3+/–; 13.Nd7 Nbd7 14.d3 dc4 15.dc4 Qe7 16.Nc3+/–) 13...c6 14.Nc3 dc4 15.Nc4 Bc7 16.Ne5+/–; 12...c6 13.Qb3 Bc5 14.cd5 Nd5 15.Rc1 Bd6 16.bc6+/–) 13.Bc4 (13.Qa4 Bd6 14.Nc4 Be7 15.Ne5 Bd6 16.Rc1+/–; 13.Bc3 Bd6 14.Nc4 Nd5 15.Qc2 Qg5 16.Nd6+/–; 13.Nd7 Nbd7 14.Bc4 Bd6 15.d4 Nd5 16.e4+/–) 13...Ne4 (13...c6 14.Nc6 Bc6 15.bc6 Qc7 16.Bb5+-) 14.d3 (14.Qa4 Ba5 15.d4 Nd6 16.Bd3+/–) 14...Nd6 15.Nd2 (15.Qb3!? Nc4 (15...Ba5+- 16.Rc1+/–) 16.dc4+/–; 15.Bc3 Bc5 16.Qf3+/–) 15...Bb5 (15...Bd2 16.Qd2=) 16.Nb3?? (better is 16.Bb5!? Nb5 17.Ndc4+-) 16...Bc4 (better is 16...Nc4 17.Nc4 Bc4 18.dc4 Qd1 19.Rd1 Nc6-/+) 17.dc4+= c5 18.Qf3 f6 19.Qh5 Ke7 20.Ng6 Kd7 21.Rd1 Kc7 22.Nf4 Qe7 23.Ng6 (better is 23.Qg4!? Re8 24.Nh5+/–) 23...Qf7= 24.Rd6 (better is 24.Qh3!?=) 24...Kd6-/+ 25.Qg4 Nc6 26.e4? (better is 26.Nf4!?-/+) 26...e5-+ 27.Qd1? (27.f4 Qc4 28.Qf3 Qc2 29.fe5 fe5-+ (29...Ne5?! 30.Be5 fe5 31.h4-+)) 27...Nd4 (better is 27...Kc7 28.Qd5 Qd5 (28...Qg6 29.Qg8 Qe4 30.h3 Qb1 31.Kh2 Qb3 32.Qg7 Kc8 33.Qf6-/+) 29.ed5 Ra8 30.dc6 Ra3-+ (30...Kc6?! 31.Bb2-+)) 28.Nd4 ed4 (28...Qg6 29.Nb5 Ke7 30.Qd6 Kf7 31.Qd7 Kf8 32.Nd6 Qg2 33.Kg2 b5 34.Qd8) 29.Bd4 (better is 29.Nf4 Qc4 30.Nd5-+) 29...Ra8?? (better is 29...cd4 30.Qd4 Kc6-+) 30.Bb2?? (30.Be5 Kc6 31.Ne7 Kb7 32.Qd7 Ka6 33.Qb5 Ka7 34.Qa4 Ba5 35.Qd7 Ka6 36.Qb5 Ka7 37.Bb8 Rb8 38.Nc6 Kb7 39.Na5 Kc7 40.Qc6 Kd8 41.Qd6 Kc8 42.Qc6 Kd8 43.Qd6 Kc8 44.Qc6 Kd8=) 30...Kc7-/+ 31.Nf4 Qd7 (31...Qc4 32.Nd5 Kb7 33.Nb4 Qb4 34.Qd5 Ka7 35.Qa2 Kb8 36.Qg8 Kc7 37.Qf7 Kc6 38.Qd5 Kb5 39.Qd3 Qc4-+) 32.Nd5= Kc6 33.Qe2 (33.e5!? Kb7 34.ef6+=) 33...Ra2= 34.h3?? (better is 34.Qc2=) 34...Qa7?? (better is 34...Ba3 35.Qf3 Bb2-+) 35.Qg4 (better is 35.e5 Rb2 36.Qb2 fe5 37.Qe5+/– (37.Nb4?! cb4 38.Qb4 Qa1 39.Kh2 Qd4=)) 35...g5?? (better is 35...Rb2 36.Qe6 Kb7 37.Qd7 Kb8 38.Qe8 Kb7 39.Qd7 Kb8 40.Qe8 Kb7 41.Qd7=) 36.Qe6 (better is 36.Qc8 Kd6 37.Qd8 Kc6 38.Ne7 Qe7 39.Qe7+-) 36...Kb7 37.Qd7 Ka6? (37...Ka8 38.Qd8 Qb8 39.Qf6 Ba5+-) 38.Qa7 (better is 38.Nc7 Qc7 39.Qc7 Rb2 40.Qb8+-) 38...Ka7-/+ 39.Bf6 Rd2 (39...Be1!? 40.f3 Bg3-/+) 40.Bg7 Rd1 41.Kh2 Bd2 42.Bh6 (42.Bh6 Rc1 43.h4 Rc4 44.f3+/–) 1–0. Grits – kdfoerster, Live Game Caissa's Web, 2004.

8.Nf3 Nf6 9.Be2 Bb4 10.0-0 h6 11.Ne5 Rg8 12.Bd4 A) 12...c6 13.f4 (13.Bh5 Rf8 14.Nd7 Qd7 15.Be2 Bd6 16.bc6+=; 13.Re1 Bd6 14.f4 c5 15.Bb2 g5 16.Rf1+=) 13...c5 14.Bc3 Bc3 15.Nc3 Qc7 16.d4+=; B) 12...Be7 13.c3 (13.c4 c5 14.Bc3 Ne4 15.d4 dc4 16.Bc4+/–; 13.Bb2 c6 14.f4 cb5 15.Nd7 Qd7 16.Nc3+=; 13.f4 c5 14.bc6 Nc6 15.Nd7 Nd7 16.Bb2+=; 13.Nd7 Nbd7 14.c4 dc4 15.Bc4 Bd6 16.d3+/–) 13...Qc8 14.Qb3 c5 15.bc6 Nc6 16.Qb6+/–; C) 12...c5 13.Bc3 Bc3 14.Nc3 d4 15.Na4 Qc7 16.f4+=; D) 12...Bd6 13.Nc3 c5 14.bc6 Nc6 15.Nc6 Bc6 16.Nb5+=.

5.Nf3 a6 =.

5.Nf3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7).

5.f4 Qh4 6.g3 Qd8 7.Nf3 a6 8.Nc3 Nf6 9.Be2 Be7 +=.

5.f4 Qh4 6.g3 Qh6 7.Bg2 Nf6 (7...a6 8.a4= Nf6 9.Nf3 c5 10.Ne5 Be7 11.0-0=) 8.c4 (8.Nf3 a6 9.Nd4 Be7 10.0-0 0-0 11.a4+=; 8.a4 Be7 9.Nf3 a6 10.Bd4 ab5 11.ab5+=) 8...Be7 (8...a6 9.Bd4= (9.Nc3 Be7 10.cd5 0-0 11.a4+=) 9...ab5 10.cb5 Nfd7 11.Qb3+=) 9.Bf6 (9.cd5 Nd5 10.e4 Nf6= 11.Qe2=) 9...Qf6 10.d4 (10.Nc3 c6= 11.Nf3=) 10...Bb4 (10...a6 11.Qc2+= (11.cd5 Bb4 12.Nd2 ed5 13.Rb1-/+)) 11.Kf2= c6 (11...0-0 12.Ne2=) 12.bc6 Bc6 (12...Nc6 13.cd5 ed5 14.a3=) 13.cd5 (13.Qb3 Na6+=) 13...ed5= 14.Qb3 Qd6 15.Ne2 (15.Nf3 0-0=) 15...0-0 16.Rc1 (16.Nbc3 Bc3 17.Nc3=) 16...Ba5 (16...Rd8!?=) 17.Nbc3+/– Rd8 18.Nb5 (18.Nd5!? Qd7 19.e4+/–) 18...Qd7= 19.Nec3 (19.Nbc3 Na6+=) 19...Bc3 (19...Na6 20.a3=) 20.Nc3 Qe6 (20...Na6 21.Rc2=) 21.Rc2 (21.Nd5!? Qd7 22.Qc4+/–) 21...h6 (21...Na6 22.Rac1=) 22.Rac1 Rd6 (better is 22...Na6+/–) 23.Nd5?? (better is 23.e4 de4 24.Qe6 fe6 25.Ne4 Rd4 26.Rc6 Nc6 27.Rc6+/–) 23...Bd5-/+ (23...Rd5?? 24.Rc6 Nc6 25.Bd5+- (25.Qd5?! Qd5 26.Bd5 Nb4 27.Ba8 Nd3 28.Kf3 Nc1+-)) 24.Bd5 Rd5 25.Rc8 Kh7 26.Rf8 Qd7 (better is 26...Ra5!? 27.Qe6 fe6=) 27.Rcc8+/– Rh5 (better is 27...Qe6!?+/–) 28.h4 (better is 28.Qb1 g6 29.Qe4+- (29.Rb8 Rb8 30.g4 Qg4 31.Rf7 Kg8-+)) 28...Kg6? (28...Qh3 29.Qb1 f5+-) 29.Rcd8 (29.Rb8?! Rb8 30.Rb8 Rd5+/–) 29...Qc7 (29...Qe6 30.g4! Qb3 31.gh5 Kh5 32.ab3 Kh4 33.Rf7 g6+-) 30.Qd3 Kf6 31.e4 Nd7 32.e5 1–0. Suess,Stefan – Boehringer,W, corr, 1984.

6.a4 Be7 (6...a6 7.Nf3 Bb4 8.Be2 0-0 9.0-0 c5=; 6...Bb4 7.Nf3 0-0 8.Be2 a6 9.0-0 c5=; 6...Bd6 7.Nf3 0-0 8.Be2 a6 9.0-0 Qe7=; 6...Bc5 7.Nf3 a6 8.Be2 0-0 9.0-0 Nbd7=) 7.Nf3 c5 8.Be2 0-0 9.0-0 a6 =.

6.Nc3 c5 (6...Be7 7.Nf3 a6 8.Be2 0-0 9.0-0 ab5=; 6...Bc5 7.Nf3 a6 8.a4 0-0 9.Be2 c6=; 6...a6 7.Nf3 Be7 8.Be2 ab5 9.Bb5 c6=; 6...Bd6 7.Nf3 a6 8.Be2 c6 9.a4 0-0=) 7.bc6 Nc6 8.Nge2 Be7 9.Rb1 d4 +=.

6.Bd3 a6 (6...c5 7.Nf3 a6 8.0-0 c4 9.ba6 Na6+=; 6...Bd6 7.Nf3 c5 8.0-0 a6 9.Nc3 0-0=; 6...Be7 7.Nf3 a6 8.0-0 0-0 9.a4 c5=) 7.Nf3 ab5 8.Bb5 c6 9.Be2 Bc5 +=.

6.Be2 Be7 (6...a6 7.a4 c5 8.Nf3 Be7 9.0-0 0-0=; 6...Bd6 7.Nf3 a6 8.Nc3 c6 9.a4 0-0= 0.00) 7.Nf3 a6 8.a4 0-0 9.0-0 c5 =.

6.Nf3 Bc5 (6...a6 7.a4 (7.Nc3= Be7 8.Be2 ab5 9.Nb5 c6=) 7...Be7 8.Be2 0-0 9.0-0 c5=; 6...Be7 7.Be2 a6 8.a4 0-0 9.0-0 c5=; 6...Bd6 7.Be2 a6 8.Nc3 c6 9.a4 0-0=) 7.d4 (7.Be2 a6 8.a4 0-0 9.0-0 Nbd7=) 7...Bb4 8.c3 (8.Bc3 Be7 9.Bd3 a6=) 8...Ba6?? (better is 8...Bd6= 9.Ba3 c5+=) 9.h3 (better is 9.cb4 Bb7 10.Bd3+-) 9...Ne4 (9...Be7 10.ba6 Ne4 11.h4+-) 10.Bd3 (better is 10.cb4 Ng3 11.Rh2 Nf1 12.Kf1 (12.ba6?! Nh2 13.Nh2 c6+=) 12...Bb5 13.Kf2+-) 10...f5? (10...Be7 11.ba6 Bh4 12.g3 (12.Nh4?? Qh4 13.g3 Qg3 14.Ke2 Qf2) 12...Bg3 13.Ke2+-) 11.Ng5! (11.ba6?! Ng3 12.Rg1 Bd6+-) 11...Ng5 (11...Qg5 12.fg5) 12.Qh5?? (better is 12.cb4!? Ne4 13.Be4 (13.ba6?? Qh4 14.g3 Qg3 15.Ke2 Qf2) 13...Qh4 14.Ke2 Bb5 15.Bd3 Bd3 16.Qd3+-) 12...Nf7 (12...g6 13.Qg5 Be7=) 13.Nd2 (13.cb4 Bb7+=) 13...Nd7 (better is 13...Bb5 14.Bb5 c6-/+) 14.g4?? (better is 14.cb4 Nf6 15.Qh4+=) 14…c6 (14...c6 15.gf5 Nf6= (worse is 15...Bb5 16.Bb5 Nf6 17.Bc6 Ke7 18.Qd1+/–); better is 14...g6 15.gf5 gh5 16.fe6 Qe7 17.ef7 Kf7-+) 0–1. Van den Berg,CB – Mommersteeg,J, corr NED–ch H, 1986.

5.a4 a6 A) 6.ba6 Na6 (6...c6 7.a5 Na6 8.ab6 Qb6 9.Ra2 Nc7=; 6...Ne7 7.a5 c5 8.Bc3 Na6 9.Nf3 f6=) 7.a5 c5 8.Bc3 b5 9.Nf3 f6=; B) 6.Be2 c6 (6...Nf6 7.Nf3 Bd6 8.0-0 0-0 9.Ne5 c5=) 7.Nf3 Nf6 8.Be5 ab5 9.ab5 Ra1=; C) 6.Bd3 Nf6 (6...c5 7.bc6 Nc6 8.Nf3 Nf6 9.0-0 Bd6=; 6...Qg5 7.Nf3 Qg4 8.0-0 Nf6 9.Be2 Bd6+=; 6...c6 7.Nf3 Nf6 8.Nc3 Bd6 9.e4 e5=) 7.Nf3 Bd6 8.0-0 c5 9.ba6 c4=; D) 6.Nf3 Nf6 (6...c6 7.Ne5 Nf6 8.Qf3 Be7 9.Be2 0-0=) 7.Ne5 Bd6 8.ba6 c6 9.Nd7 Nbd7=.

5.a4 c5 6.g3 (6.Nf3 Nf6 (6...a6 7.Ne5 ab5 8.ab5 Ra1 9.Ba1 Nf6=) 7.Be5 a6 8.ba6 Na6 9.Bb5 Be7=; 6.Be2 a6 (6...Nf6 7.Be5 Ne4 8.Nf3 f6 9.Bb8 Qb8=; 6...c4 7.d3 cd3 8.Bd3 a6 9.Nf3 Bb4+=) 7.Nf3 Nf6 8.ba6 Be7 9.0-0 Na6=; 6.Qf3 a6 7.Be5 ab5 8.ab5 Ra1 9.Ba1 Ne7=) 6...Ne7 (6...Nf6 7.Be5 Be7 8.Nc3 0-0 9.Be2 Bc8+=; 6...a6 7.Nf3 Nf6 8.ba6 Be7 9.Ne5 0-0=) 7.Bg2 a6 8.Nc3 (8.Na3 Bc8 9.Nf3 Nd7=) 8...ab5 (8...Ng6 9.Nf3 Bd6=) 9.Nb5 Bb5 (9...Nf5=) 10.ab5 Nd7 11.Ne2 Ng6 12.0-0 Bd6 13.Ra8 Qa8 14.Bg7 Rg8 15.Bb2 Qa5 16.Nc3 Be5 (16...Qb4 17.Ba1+/–) 17.Qa1 (17.f4!? Qb4 18.Qa1 Bb8+-) 17...Ke7 18.Qa5 ba5 19.f4 Bc3 20.Bc3 a4 21.Ra1 Nb6 22.d4 Kd6?? (better is 22...cd4 23.Bd4 Rb8+-) 23.dc5 Kc5 24.Bd4 Kb5 25.Bb6 (better is 25.Rb1 Kc6 26.Rb6 (26.Bb6?! Rb8+=) 26...Kd7 27.Ra6+-) 25...Kb6+= 26.Ra4 Kc6 (26...Rc8!? 27.Rb4 Ka7+/–) 27.c4 Rd8 28.cd5 ed5 29.Ra7 (29.Ra7 Re8 30.Rf7 Re3 31.Rh7+-) 1–0. MasterofDisaster – nexx, Live Game Caissa's Web, 2004.

5.a4 c6 A) 6.Bd3 a6 (6...Nf6 7.Nf3 a6 8.Nc3 ab5 9.ab5 Ra1=) 7.Nf3 Nf6 8.0-0 Bd6 9.Ne5 ab5=; B) 6.Be2 a6 (6...Nf6 7.Be5 Ne4 8.Nf3 f6 9.Bb8 Qb8=) 7.Nf3 Nf6 8.0-0 Bd6 9.ba6 Bc8=; C) 6.Nf3 Nf6 (6...a6 7.Ne5 Nf6 8.Qf3 Be7 9.Be2 0-0=) 7.Ne5 a6 8.Qf3 Be7 9.Be2 0-0=; D) 6.Nc3 Nf6 (6...e5 7.Qh5 Qe7 8.Nf3 e4 9.Nd5 Qd6+/–; 6...a6 7.Nf3 Nf6 8.Bd3 Bd6 9.e4 e5=) 7.f4 Be7 8.Nf3 a6 9.Be2 ab5=.

5.a4 Nf6 A) 6.Nf3 c5 (6...a6 7.Ne5 Bd6 8.ba6 c6 9.Nd7 Nbd7=; 6...Be7 7.Be2 a6 8.0-0 0-0 9.Ne5 c5=; 6...Bd6 7.Be2 a6 8.0-0 0-0 9.Ne5 c5=; 6...c6 7.Ne5 a6 8.Qf3 Be7 9.Be2 0-0=) 7.Be5 a6 8.ba6 Na6 9.Bb5 Be7=; B) 6.Nc3 c6 (6...c5 7.Qf3 Bd6 8.Nh3 0-0 9.Be2 a6=; 6...a6 7.Nf3 Bd6 8.ba6 c6 9.Ba3 Ba3=; 6...e5 7.a5 ba5 8.Ra5 c6 9.Qa1 d4=; 6...Bd6 7.a5 ba5 8.Ra5 c6 9.Qa1 Qc7=) 7.a5 ba5 8.Nf3 c5 9.Be2 a6+=; C) 6.Be5 a6 (6...Be7 7.Nf3 a6 8.Nc3 0-0 9.Bd3 c5=) 7.Nf3 Ne4 8.Be2 f6 9.Bb2 Bd6=; D) 6.a5 ba5 7.Bf6 gf6 8.c4 dc4 9.Bc4 a6+=; E) 6.Be2 a6 (6...Bd6 7.Nf3 a6 8.0-0 0-0 9.Ne5 c5=) 7.Nf3 Bd6 8.0-0 0-0 9.Ne5 c5=.

5.c4 dc4 6.Bc4 Nf6 7.Nf3 Bd6 8.0-0 0-0 9.a4 e5? (better is 9...a6!?=) 10.Be5 Be5 (10...a6!?+/–) 11.Ne5+- Bf5 12.f3 (better is 12.d3 Nbd7 13.Nc6+-) 12...Re8?? (better is 12...a6+/–) 13.Bf7 (better is 13.Nf7!? Qe7 14.Nh6 Kh8 15.Nf5 Qe5+-) 13...Kh8 14.Be8 Qe8 15.Nc4 (15.d4 Nbd7 16.f4 a6+-) 15...Nbd7? (15...Bd3 16.Nba3 Qe6 17.Rc1 Bf1 18.Qf1+-) 16.f4 (16.d4 Be6 17.Nbd2 a6+-) 16...Rd8? (better is 16...Bd3 17.Nba3 Bf1 18.Qf1 a6+-) 17.Re1 (17.d4 Nd5 18.Qb3 N7f6+-) 17...Qg6 18.Nc3 Nc5 (18...Bd3 19.Nb2+-) 19.Ne5 Qe8 20.Ne2 (20.d4!? Qe6+-) 20...Nd3 21.Nd3 Bd3 22.Nc1 Qh5 (22...Ne4+-) 23.Qh5 Nh5 24.Nd3 Rd3 25.Ra2 Nf6 26.Rc2 Rd7 27.e4 Rd4 (27...Ne8 28.g3+-) 28.Rc7 Ra4 (28...Kg8 29.e5 Ne8 30.Ra7 Kf8+-) 29.e5 Ng8 30.Rb1 (better is 30.e6 h6 31.Rc8 Kh7 32.Rg8 Kg8+-) 30...h6 31.e6 Rf4 32.Ra7 (32.Re1!? Rf8+-) 32...Re4 33.Rb7 (better is 33.Rc1!? Re6 34.Rcc7 Re1 35.Kf2 Re6 36.Rg7 Nf6+-) 33...Re6 34.Rc1 Rd6 (34...Ne7 35.Rcc7 Nf5 36.Rf7 Re1 37.Kf2+-) 35.Rc6 (better is 35.Rc8!? Kh7+-) 35...Rd2 36.Rbb6 (36.Rc8 Rb2+-) 36...Ne7 (36...Nf6 37.h3+-) 37.Rc3 (37.Rc5 Ng8+-) 37...Kh7 38.Rb3 Nf5 39.Re6 (better is 39.Ra6 Rd1 40.Kf2 Rd2 41.Ke1 Rg2 42.b6+-) 39...Nd4 40.b6 (40.Rd6 Ne2 41.Kf2 Rd6 42.Ke2 Rb6+-) 40...Nb3 41.b7 Rd8 42.Rb6 Nc5 43.b8Q Rb8 44.Rb8 h5 (44...Kg6 45.Kf2+-) 45.Rb5 Ne6 46.Rh5 Kg6 47.g4 Ng5 48.Kg2 Nh7 49.h4 Nf6 50.Rg5 Kh6 51.Kf3 Nh7 (51...Kh7 52.h5+-) 52.Rb5 (better is 52.Rh5 Kg6+-) 52...g6 (52...Nf8+-) 53.Kf4 Nf8 54.Rb6 Nh7 (54...Kg7 55.h5 gh5 56.gh5 Kg8+-) 55.h5 Nf8 56.Rf6 (56.hg6 Kg7 57.Kf5 Nh7 58.Rb7 Kg8 59.gh7 Kh8 60.Rb8 Kh7 61.g5 Kg7 62.g6 Kh6 63.Rb7 Kh5 64.Rh7) 56...Nh7 (56...Kg7 57.Rf8! gh5+-) 57.Rg6 1–0. Valpa – Djusta, playchess.de, 2004.

5.Nf3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Qe7 9.Ne5 (9.Be2 Qb4 10.Nc3 Nf6+=) 9...Qc5 (9...Nf6 10.Bd3+=) 10.d4 (10.Bb2 Qb4 11.Bc3 Qd6+=) 10...Qb4 11.Bc3 Qa4 12.Qd3 (12.Bd2 Nf6+=) 12...Qa2 (12...Nf6 13.Be2+=) 13.Nd2 Nf6 14.Be2 Ne4 (14...c5 15.bc6 (worse 15.Nd7 Nbd7 16.e4 c4-/+) 15...Nc6 16.0-0+-) 15.0-0 Nd2 (better 15...Nc3!? 16.Qc3 Bd6+-) 16.Ra1+- (16.Bd2?! Bd6+-) 16...Qa1 17.Ba1 Nc4? (17...Ne4+-) 18.Nc4 dc4 19.Qc4 Be7 (19...Bd6+-) 20.Qc7 0-0 21.Qb6 Bb4 (21...Rc8 22.c4+-) 22.c3 (22.d5 Rc8 23.Be5 ed5+-) 22...Ba3 23.c4 Bc1 (23...Be7 24.c5+-) 24.c5 Rc8 25.c6 Bc6 26.bc6 Nc6 27.Qb7 Ne7 (27...Rd8 28.Qc6 Ba3 29.e4+-) 28.Qe7 Bb2 29.Bb2 g6 30.d5! Rc2 (30...ed5 31.Qd7 Double attack (31.Qd7 Decoy)) 31.Qe8 (31.Qd8) 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.c4 dc4 6.Bc3 Bb7+= 7.Bd3?? (better is 7.Nf3+= Bd5 8.Qc2 Ngf6 9.Bd4 c5 10.Bb2 a6+=; 7.Na3 Nc5 8.Nc4 Nd3 9.Bd3 Bg2 10.Nf3 Bh1-/+) 7...g6 (7...Bg2 8.Bg7 Bg7-+) 8.Bb2?? (8.Bh8 Bg2 9.Bg6 hg6-+ (9...Bh1 10.Bf7 Kf7 11.Qh5 Ke7 12.Qh7 Kd6 13.Qg8+=; worse is 9...fg6 10.Na3-+)) 8...c5 (8...Ngf6 9.Bc4 Bg2 10.Be6 fe6 11.Qb3-+) 9.Bf1 (better is 9.Nf3=) 9...Nb8?? (9...Ngf6 10.d3-/+) 10.Ne2 (10.Bh8 a6 11.ba6 Ra6+-) 10...Bh6?? (10...Nf6!?+=) 11.d3 (better is 11.Bh8 a6 12.ba6 Ra6 13.Nec3+-) 11...Qd4?? (better is 11...Nf6 12.dc4 Qd1 13.Kd1 Nbd7+=) 12.Nf4 (better is 12.ed4 cd3 13.Qd3 Bg7+-) 12...Bc8 (better is 12...Qb2!? 13.Nd2 Bf4 14.ef4 cd3 15.Bd3 Bg2 16.Nc4 Qc3 17.Ke2-+) 13.g4 (13.ed4 Bf4 14.dc4 Bb7 15.dc5 e5+-) 13...Kf8 (13...Qb2 14.Nd2 c3 15.Nc4-+) 14.Ne2 (better is 14.ed4 Bf4 15.dc5 e5+-) 14...Qe3 (better is 14...Qb2 15.Bg2 Qa1 16.Ba8 cd3 17.Qd3 Kg7-+ (17...Qa2?! 18.Nec3 Qa5 19.Qd8 Kg7 20.Qc8-+)) 15.g5! Bd7?? (15...Bg5 16.fe3) ½–½. Mroz,Antoni – Wantulok,J, corr ch Poland distr, 1993.

5.c4 dc4 6.Qf3!? Rb8 A) 7.Bc4= Bb7 (7...Ngf6 8.d3 Bb7 9.e4 Bd6 10.Nd2 Ne5=) 8.Qg3 Ngf6 9.d3 Bd6 10.Qh3 c6+=; B) 7.e4 Ngf6 (7...Bb7 8.Bc4 Ngf6 9.d3 Bd6 10.Nd2 Ne5=) 8.Bc4 Bb7 9.d3 Bd6 10.Qe3 c6=.

5.d3 Ngf6 6.Nd2 Bb7 7.Be2 A) 7...Bd6 8.Ngf3 (8.a4 c5 9.c4 0-0 10.Ngf3 a6 11.0-0+=) 8...c6 9.bc6 Bc6 10.0-0 0-0 11.c4=; B) 7...a6 8.ba6 (8.a4 Bd6 9.Ngf3 0-0 10.0-0 e5 11.c4=) 8...Ra6 9.Ngf3 Qa8 10.Qb1 Bd6 11.0-0=.

5.d3 Ngf6 6.Nd2 Bb7 7.Ne2 a6 8.a4+= (8.ba6 Ra6 9.d4 Ra8 10.Nf4 Bd6 11.Be2+=; 8.c4 dc4 9.dc4 Bb4 10.Nc3 0-0 11.Qc2+=; 8.Nd4 ab5 9.Nb5 c6 10.Nd4 e5 11.Nf5+=; 8.Nc3 ab5 9.Nb5 c6 10.Nd4 Bd6 11.Be2+=) 8...Bb4 9.Nd4 0-0 10.Be2 e5 11.Nc6 +=.

5.d3 Ngf6 6.Nd2 Bb7 7.Ne2 Bd6 8.Nd4 (8.Nc3 0-0 9.Nf3 c5 10.bc6 Bc6 11.Nd4+=; 8.c4 a6 9.cd5 Bd5 10.ba6 Ra6 11.Nc3+=) 8...Be5 (8...a6 9.Be2= 0-0 10.a4 e5 11.Nf5=) 9.N2f3 0-0 (9...Bd4 10.Bd4 a6 11.ba6= (11.a4=)) 10.Be2 (10.Ne5!? Ne5 11.Ne6 Nd3 12.cd3 fe6 13.Rc1=; 10.Ne6 fe6 11.Ne5+/–) 10...Bd4 (10...Bd6 11.0-0=) 11.Nd4 (11.Bd4=) 11...Nc5 (11...a6 12.a4=) 12.0-0 Qd6 (12...Na4 13.Ba3 Re8 14.c4=) 13.g3 (better is 13.a4!?+/–) 13...Na4 14.Bc1 (14.Qc1!? Nb2 15.Qb2+=) 14...Nc3 15.Qd2 Ne2 16.Qe2 (16.Ne2 a6-/+) 16...c5 (better is 16...e5!? 17.Nf3 a6-/+) 17.bc6= Bc6 18.a4 (better is 18.Bb2=) 18...Bd7 (better is 18...Rfc8=) 19.Ba3+/– Qc7 20.Bf8 Rf8 21.Nb5 (21.f4 Rc8+/–) 21...Bb5 (21...Qb8!?+/–) 22.ab5+- Rc8 (22...Ne8 23.e4+-) 23.Rac1 (23.Ra2 Qd7+-) 23...Nd7 (23...Ne8!?+-) 24.c4 dc4 (24...h6 25.cd5 Qc1 26.Rc1 Rc1 27.Kg2+-) 25.Rc4 Qb7 26.Rfc1 (26.Rc8!? Qc8 27.Ra1 Qc7+-) 26...Rc4 27.Rc4 h6 (27...Ne5 28.Rc3+-) 28.d4 (28.Qc2 Nf8+-) 28...Qd5 (28...a6+-) 29.Rc8 Kh7 30.Qd3 (30.Rc7 g6+-) 30...g6 (30...f5 31.Qc4 Qe4 32.Qc2+-) 31.Rd8 (31.Qa3 Qb7 32.Rc6 Nf6+-) 31...Qb7 (31...e5+-) 32.e4 (32.d5 Ne5 33.Qa3 g5+-) 32...Kg7?? (better is 32...Qc7 33.Ra8 Qb7+/–) 33.d5+- Qc7 (33...ed5 34.Qc3 Nf6 35.Qe5 de4 36.Rd6+-) 34.de6 Qd8 (34...Ne5 35.Qd4 fe6+-) 35.Qd7 Qd7 36.ed7 Kf6 37.d8Q Ke6 38.f4 f5 39.e5 g5 (39...a6 40.Qd6 Kf7 41.e6 Kg8 42.Qd8 Kh7 43.Qc7 Kg8 44.Qf7 Kh8 45.e7 ab5 46.e8Q) 40.Qd6 Kf7 41.e6 Kg6 42.e7 Kh5 (42...Kf7 43.Qd8 h5 44.e8Q Kg7 45.Qg5 Kh7 46.Qeh5) 43.e8Q Kg4 44.h3! Kg3 (44...Kh3 45.Qh6) 45.Qe3 Kh4 1–0. MasterofDisaster – bueno, Live Game Caissa's Web, 2005.

5.d3 Ngf6 6.Nd2 Bb7 7.Ne2 Be7 8.Nd4 (8.c4 dc4 9.dc4 0-0 10.Nd4 a6 11.f3+=; 8.Ng3 0-0 9.Be2 a6 10.a4 c6 11.ba6+=; 8.a4 a6 9.Nd4 0-0 10.Be2 Qc8 11.0-0=; 8.Nf4 0-0 9.d4 a6 10.a4 c5 11.bc6=) 8...a6 9.a4 0-0 10.Be2 Qc8 11.0-0 =.

5.d3 Ngf6 6.Nd2 Bb7 7.Ngf3 A) 7...Bd6 8.Be2 (8.e4 e5 9.ed5 Nd5 10.d4 Qe7 11.Qe2+=; 8.c4 0-0 9.Be2 a6 10.0-0 ab5 11.cb5=) 8...0-0 9.0-0 a6 10.ba6 Ra6 11.e4=; B) 7...a6 8.a4 (8.ba6 Ra6 9.Be2 Qa8 10.Qb1 Bd6 11.0-0+=; 8.c4 dc4 9.dc4 Bf3 10.Qf3 Bb4 11.Rd1+=; 8.d4 ab5 9.Bb5 Bd6 10.0-0 0-0 11.Qe2+=) 8...Bd6= 9.Be2 0-0 10.0-0 c5 11.bc6=.

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6).

5.Nf3 Be7 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.Be2 b6).

5.e3 a6 6.Be2 =.

5.e3 Nd7 6.Nc3 a6 =.

5.e3 Nd7 6.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Nbd7).

4.a4 a5 5.e3 b6 6.c4 dc4 7.Bc4 (7.Qf3 Qd5+=) 7...Nf6= 8.Nf3 Be7 9.0-0 0-0 10.Be2 (10.d4 Bb7+=) 10...Bb7= 11.d4 Nbd7 12.dc5 Nc5 13.Nd4 Qc7 14.Bf3 Rfd8 (14...Nfe4 15.Qc2=+) 15.Bb7= Qb7 16.Qe2 e5 (better 16...Rac8!?=) 17.Nc6+- Rd6 (17...e4 18.Nd8 Rd8 19.Nc3+-) 18.Be5 Rc6 (18...Re6 19.Nc3+-) 19.bc6+- Qc6 20.Bf6 (better 20.Nc3!?+-) 20...Bf6+= 21.Qf3?? (better 21.Ra2 Na4 22.Rc2+=) 21...Qf3-+ 22.gf3 Ba1 23.Nd2 Bc3 24.Nc4 Rb8 (24...Na4 25.Rb1-+) 25.Rd1 Na4 26.Rd7 (26.Rd5 Kf8-+) 26...Bb4 (better 26...b5 27.Na3 b4 28.Nb1-+) 27.Ne5 f6 28.Ng4 (28.Nc6 Rc8 29.Nd4 Nc5-+) 28...Nc5 (28...h5 29.h4 hg4 30.fg4-+) 29.Rc7 (29.Rd5 a4 30.e4 a3-+) 29...Ne6 (29...h5 30.h4-+) 30.Rc6 Nd8 31.Rc7 a4 (better 31...h5 32.h4 hg4 33.fg4-+) 32.Ra7 (32.Rc4 Bf8 33.Ra4 h5-+) 32…a3 0–1. RichardSommer (2135) – agentoskar (2245), lichess.org, 2020.

4.a4 d4 5.e3 e5 6.ed4 cd4 (6...ed4 7.Nf3=) 7.Bc4 Nd7 8.d3 (8.Qe2!?=) 8...Nb6 9.Nf3 (9.Bb3 Bb4 10.c3 Ba5=) 9...Nc4 10.dc4 f6 11.Nbd2 (11.0-0 Be6=+) 11...Bf5 (11...Bb4 12.0-0-/+) 12.0-0 Bg6 (12...Qa5 13.Qe2 Ne7 14.c5=+) 13.c3 Bc5 (better 13...dc3 14.Bc3 Qd3=) 14.cd4+- ed4 15.Re1 (15.Nb3!? Bb4 16.Nbd4+-) 15...Ne7+= 16.Nb3 The pressure on the isolated pawn grows 16...Bb6?? (better 16...Bb4!? 17.Nfd2 d3+=) 17.Nbd4 (better 17.Ba3+-) 17...Bd4 (17...Ba5 18.Re2 0-0 19.Ne6 Qd1 20.Rd1+-) 18.Nd4 (worse 18.Qd4 Qd4 19.Nd4 Kf7+-) 18...0-0 (18...Kf7 19.Qb3 Rc8 20.c5 Nd5 21.Rad1+-) 19.Ne6 Qd1 20.Rad1 Rfe8 (20...Rfc8 21.Rd7 Nf5 22.g4 Rc4 23.h3+-) 21.Nc7 Nf5 22.Ne8 (22.Re8 Re8 23.Ne8 Be8+-) 22...Re8 (22...Be8 23.Rd5 Nh4 24.Red1+-) 23.Re8 Be8 24.Rd8 Kf7 25.Rb8 (better 25.c5 a6 26.Rb8 ab5 27.ab5 Bc6 28.bc6 bc6+-) 25...Nd6 (25...b6+-) 26.c5 Nc4 27.Rb7 Kg6 (27...Ke6 28.Bc3 Kd5 29.Rg7 Kc5 30.Ra7+-) 28.Bd4 Nd2 (28...a6 29.ba6 Bc6 30.Rc7+-) 29.c6 Bf7 (29...Nc4 30.Ra7 Kh6 31.Ra8+-) 30.Be3 (better 30.Rf7 Kf7 31.c7 Nc4+-) 30...Ne4 31.Ra7 Nd6 (31...Bd5+-) 32.Rf7! Kf7 (32...Nf7 33.b6 Passed pawn; 32...Kf7 33.b6 Passed pawn) 33.Bc5 (33.b6 g5+-) 33...Nc8 (33...Ke6 34.Bd6 Kd6+-) 34.b6 Ke6 35.b7 Nd6 36.b8Q Nc8 37.Qc8 Kd5 (37...Ke5 38.c7 Kf4 39.Be3 Ke5 40.Qe8 Kd6 41.c8Q g5 42.Qee6) 38.Qd7 Kc5 (38...Kc4 39.Qd4 Kb3 40.Qd3 Kb2 41.Bd4 Kc1 42.c7 h6 43.c8Q) 39.c7 Kc4 (39...Kb4 40.Qb5 Kc3 41.c8Q Kd2 42.Qd5 Ke2 43.Qce6) 40.c8Q (40.c8Q Kb4 41.Qb5 Ka3 42.Qc3 Ka2 43.Qbb3) 1–0. BeepBeepImAJeep (2665) – Chegs (1655), lichess.org, 2017.

4.a4 Nd7 5.e3 c4 6.d3 Qa5 7.Bc3 Qb6 (7...Bb4 8.Qd2 Bc3 9.Nc3 cd3 10.Bd3=) 8.Bd4 (better 8.dc4 Ngf6 9.Nf3+/-) 8...Bb4?? (better 8...Qa5 9.Qd2 Qd2 10.Nd2 e5=) 9.Nd2 (9.Ke2 cd3 10.cd3 Qd4 11.ed4 Ngf6+-) 9...Qd6?? (9...Qa5 10.Bg7 Bc3+-) 10.Bg7 (10.dc4?! e5 11.Bb2 Ngf6+=) 10...Bc3 (10...Nh6 11.Bh8 (worse 11.Bh6 e5 12.Bg5 Bc3+-) 11...Qf8 12.c3+-) 11.Bc3 f6 (11...Ngf6 12.dc4 Rg8 13.Ngf3+-) 12.dc4 dc4 (12...Nc5 13.Qh5 Ke7 14.Ngf3+-) 13.Nc4 Qd1 14.Rd1 Nc5 (14...Nb6 15.Nd6 Kf8 16.a5+-) 15.Nd6 Ke7 16.Nc8 (better 16.Bb4 b6+-) 16...Rc8 17.Bb4 b6 (17...Ke8 18.Nf3 Ne7 19.Bc4+-) 18.Bc5 (18.Bc4 e5+-) 18...bc5 (18...Rc5 19.Bd3+-) 19.c4 f5 (19...Nh6 20.Nf3+-) 20.g3 (20.Nf3 Nf6+-) 20...Nf6 21.Nf3 Ne4 (21...Nd7 22.Bd3+-) 22.Ne5 Nc3 (22...Rhd8 23.Rd8 Kd8+-) 23.Rd7 Kf6 (23...Kf8 24.Nf7 Rg8 25.Nd6+-) 24.f4 Rhd8 (24...Rcf8 25.Ra7 Rhg8 26.Nd7 Kg6 27.Nf8 Rf8+-) 25.Rf7 1-0. Fuirio – OscarOrozco, Rated Classical game, lichess.org, 2013.

4.Nc3 Nf6 5.e3 a6 6.Nf3 Bd7 7.a4 c4 8.Be2 ab5 9.ab5 Ra5 10.d3 Bb5 11.dc4 Bc6 (11...Ra1!? 12.Qa1 Bc4 13.Bc4 dc4+=) 12.0-0 Be7 13.cd5 Bd5 (13...Ra1!? 14.Qa1 ed5+/–) 14.Ra5+- Qa5 15.Nd5 ed5 16.Nd4 0-0 17.Nf5 Qb4 18.Qa1 Nc6 19.Ne7 Ne7 20.Bf6 gf6 21.Qf6 Ng6 22.Bf3 Qd2? (better is 22...Qc4+-) 23.h4 Re8 (23...Qb4 24.h5 Qe7+-) 24.h5 Ne5 (24...Re6 25.Qg5 Re5+-) 25.h6 Kf8 26.Qh8 Ke7 27.Qe5 Kf8 28.Qd6 (28.Qd6 Kg8 29.Qf6 Qd4 30.ed4 Kf8 31.Bh5 Re2 32.Qf7) 1–0. Schlaeger,Michael (2270) – Maier,Ralf (2005), RSX15E – Januar, 2007.

4.c4 d4 5.e3 e5 6.ed4 ed4 7.Bd3 Nf6 8.Nf3 Bd6 9.Qe2 Be7 10.0-0 0-0 11.a4 (better 11.Ng5=+) 11...b6?? (better 11...Re8=+) 12.Be4+- Ne4 13.Qe4 Nd7 (13...Nc6 14.Qc6 Bf5+-) 14.Qa8 Qc7 15.Qc6 Qf4 (15...Qc6 16.bc6 Nb8 17.a5+-) 16.a5 (16.Re1 Nb8 17.Qa8 Bd6+-) 16...Nf6 (16...Nb8 17.Qd5+-) 17.ab6 ab6 18.Qb6 Bg4 (18...Bd6 19.Ra3 Nd7 20.Qc6+-) 19.Ra3 Bd6 (19...Rb8 20.Qa6+-) 20.g3 Qh6 (20...Nd7 21.Qc6 Qf6+-) 21.Qd6 Bf3 22.Rf3 Re8 (22...Qh5 23.Ra3 Ne4 24.Qe7+-) 23.b6 (23.Qc5 Ng4 24.h4 Ne5+-) 23…g6 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.Nf3 Qa5 A) 5.e3 A1) 5...Nf6 6.Bf6 (6.Bc3 Qb6 7.Bf6 gf6 8.Nc3 Nd7 9.a4 Bd6 10.g3) 6...gf6 7.c4 f5 8.Nc3 Bg7 9.Rc1 d4 10.Qa4; A2) 5...a6 6.c4 (6.Bc3 Qb6 7.Na3 Nf6 8.Rb1 ab5 9.Bb5 Nc6 10.Bc6) 6...ab5 7.cd5 ed5 8.Nc3 Nf6 9.Nb5 Nc6 10.Bc3; A3) 5...Nd7 6.c4 (6.Bc3 Qb6 7.a4 Ngf6 8.a5 Qd6 9.Bb2 Be7 10.Be2) 6...Ngf6 7.Nc3 Bd6 8.Bd3 0-0 9.0-0 Nb6 10.cd5; B) 5.Bc3 B1) 5...Qd8 6.g3 (6.e3 Nf6 7.d3 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1) 6...Nf6 7.Bg2 Bd6 8.0-0 Nbd7 9.d3 0-0 10.Nbd2; B2) 5...Qb5 6.e3 (6.e4 Qa4 7.ed5 ed5 8.Bb2 Qb4 9.Bc3 Qa4 10.Bb2) 6...Qb6 7.Na3 Nc6 8.Rb1 Qd8 9.Ne5 d4 10.Nc6; B3) 5...Qb6 6.e4 (6.Na3 Nf6 7.Bf6 gf6 8.c4 Nd7 9.Qb3 Qd6 10.g3) 6...de4 7.Ng5 Nf6 8.Na3 Nbd7 9.Qe2 a6 10.Ne4; C) 5.a4 C1) 5...Nf6 6.g3 (6.Bc3 Qc7 7.Bf6 gf6 8.Nc3 d4 9.Ne4 Nd7 10.e3) 6...Nbd7 7.Bg2 Bd6 8.0-0 0-0 9.d3 Qb4 10.Bc3; C2) 5...Nh6 6.Bc3 (6.g3 Nd7 7.Bh3 Nf6 8.0-0 Bd6 9.e3 Qd8 10.Be5) 6...Qb6 7.a5 Qd8 8.e3 Nd7 9.Bd3 Nf6 10.a6; C3) 5...Nd7 6.g4 (6.g3 Ngf6 7.Bg2 Bd6 8.0-0 0-0 9.d3 Qb4 10.Bc3) 6...h6 7.Rg1 Ngf6 8.e3 Bd6 9.Nc3 0-0 10.g5; D) 5.c4 D1) 5...Nf6 6.Bc3 (6.Bf6 gf6 7.e3 dc4 8.Bc4 a6 9.Nc3 ab5 10.Nb5) 6...Qc7 7.Bf6 gf6 8.cd5 ed5 9.Nc3 Be6 10.g3; D2) 5...Ne7 6.e3 (6.Nc3 Qb4 7.a3 Qb2 8.Ra2 Qa2 9.Na2 Nd7 10.Nc3) 6...Nd7 7.Nc3 Nf6 8.Qb3 h6 9.Ne5 d4 10.ed4; D3) 5...Nd7 6.Bc3 (6.e3 Ngf6 7.Nc3 Bd6 8.cd5 ed5 9.Be2 0-0 10.0-0) 6...Qb6 7.e3 Ngf6 8.Bd3 dc4 9.Bc4 Be7 10.0-0.

4.Nf3 a6 A) 5.Nc3 A1) 5...d4 6.Ne4 (6.Nb1 ab5 7.e3 b4 8.ed4 Nf6 9.Bb5 Bd7 10.Qe2) 6...Qd5 7.Ng3 Nf6 8.e3 ab5 9.Bb5 Bd7 10.Qe2; A2) 5...ab5 6.Nb5 (6.a3 Nf6 7.e3 Nc6 8.Nb5 c4 9.Be2 Qb6 10.a4) 6...Nc6 7.g3 Nf6 8.a4 Bd6 9.e3 0-0 10.Nd6; A3) 5...Nf6 6.e3 (6.ba6 Na6 7.e3 Nb4 8.Bb5 Bd7 9.0-0 Bd6 10.a3) 6...Bd6 7.Be2 0-0 8.0-0 ab5 9.Nb5 Nc6 10.Bf6; B) 5.Na3 B1) 5...ab5 6.Nb5 (6.e3 b4 7.Nb5 Nc6 8.Be2 Nf6 9.a3 c4 10.ab4) 6...Nc6 7.e3 Nf6 8.Ne5 Be7 9.a4 0-0 10.Bd3; B2) 5...Nd7 6.e3 (6.ba6 Ngf6 7.c4 Ra6 8.e3 Rb6 9.Nb5 Be7 10.Qc2) 6...Ngf6 7.c4 ab5 8.Nb5 Be7 9.Qc2 0-0 10.a4; B3) 5...Nf6 6.e3 (6.c4 ab5 7.Nb5 Nc6 8.e3 Be7 9.Be2 0-0 10.0-0) 6...Bd6 7.c4 0-0 8.Bd3 Nbd7 9.0-0 Ne4 10.ba6; C) 5.ba6 C1) 5...Na6 6.Be5 (6.e3 Nf6 7.Be5 Be7 8.Nc3 0-0 9.Bb5 Ng4 10.0-0) 6...f6 7.Bg3 Ne7 8.Nc3 Nf5 9.e4 Ng3 10.hg3; C2) 5...Nc6 6.e3 (6.Nc3 Nf6 7.e3 ba6 8.Rb1 Bd6 9.Be2 Rb8 10.0-0) 6...c4 7.Nc3 Ra6 8.Be2 Nf6 9.0-0 Bd6 10.Nb5; C3) 5...Nf6 6.e3 (6.Nc3 Na6 7.e3 Nb4 8.a3 Nc6 9.Nb5 Be7 10.Be2) 6...Na6 7.Nc3 Nb4 8.a3 Nc6 9.Nb5 Be7 10.Be2; D) 5.e3 D1) 5...ab5 6.Bb5 (6.Ne5 Qc7 7.Bb5 Nc6 8.0-0 Nf6 9.Ng4 Ng4 10.Qg4) 6...Nc6 7.Ne5 Qc7 8.0-0 Nf6 9.Ng4 Ng4 10.Qg4; D2) 5...Nd7 6.c4 (6.ba6 ba6 7.Nc3 Ngf6 8.Rb1 Bd6 9.g3 0-0 10.Bg2) 6...Ngf6 7.ba6 ba6 8.Nc3 Bd6 9.Bd3 0-0 10.0-0; D3) 5...Nf6 6.Nc3 (6.a4 ab5 7.Bb5 Nc6 8.c4 Be7 9.0-0 0-0 10.Nc3) 6...Bd6 7.Bd3 c4 8.Be2 0-0 9.0-0 Qa5 10.d3.

4.Nf3 b6 5.e3 (5.Nc3 A) 5...Nd7 6.g3 (6.e3 Ngf6 7.g3 Bb7 8.Bg2 Bd6 9.0-0 0-0 10.Qe2) 6...Ngf6 7.Bg2 Bd6 8.0-0 0-0 9.e3 Bb7 10.Qe2; B) 5...a6 6.a4 (6.e3 Nf6 7.Bd3 Nbd7 8.0-0 c4 9.Be2 Bd6 10.d3) 6...Nf6 7.e3 Bd6 8.ba6 Ba6 9.Nb5 Nc6 10.Nd6; C) 5...Nf6 6.g3 (6.h3 Nbd7 7.e3 Bd6 8.Be2 0-0 9.0-0 h6 10.Bd3) 6...a6 7.e3 Bd6 8.Bg2 0-0 9.0-0 ab5 10.Nb5; 5.g3 A) 5...Nf6 6.c4 (6.Bg2 Nbd7 7.0-0 Bd6 8.e3 0-0 9.Nc3 Bb7 10.Qe2) 6...Bd6 7.Nc3 0-0 8.Bg2 Bb7 9.0-0 Nbd7 10.cd5; B) 5...Nd7 6.Bh3 (6.d4 Ngf6 7.Nc3 Bd6 8.Bh3 0-0 9.0-0 Bb7 10.e3) 6...Ngf6 7.0-0 Bb7 8.Nc3 Bd6 9.e3 0-0 10.Qe2; C) 5...a6 6.Na3 (6.e3 Nf6 7.Na3 Bd6 8.Bg2 Nbd7 9.0-0 0-0 10.c4) 6...Nf6 7.Bh3 Nbd7 8.0-0 Bd6 9.c4 0-0 10.Qc2; 5.c4 A) 5...Nd7 6.cd5 (6.Qc2 Ngf6 7.Nc3 d4 8.Na4 Bb7 9.e3 e5 10.ed4) 6...ed5 7.Nc3 Ngf6 8.Qc2 Bb7 9.e3 Bd6 10.Be2; B) 5...d4 6.e3 (6.g3 Nd7 7.Na3 Ngf6 8.Bg2 Bb7 9.0-0 Be7 10.e3) 6...Nf6 7.ed4 Bb7 8.Bd3 a6 9.0-0 ab5 10.Na3; C) 5...Nf6 6.cd5 (6.Bf6 Qf6 7.Nc3 Bb7 8.cd5 ed5 9.e3 Bd6 10.Qc2) 6...ed5 7.e3 Bd6 8.Nc3 0-0 9.Be2 a6 10.a4) 5...Bd7 (5...Nf6!?= 6.Nc3 (6.Bd3 Bd6 7.0-0 Nbd7 8.c4 e5 9.Ng5 e4 10.Bc2) 6...Nbd7 7.Bd3 Bd6 8.0-0 0-0 9.Ba3 a6 10.Rb1; 5...Nd7 6.g3 (6.c4 Ngf6 7.Nc3 Bd6 8.Bd3 0-0 9.0-0 dc4 10.Bc4) 6...Ngf6 7.Bg2 Bd6 8.Nc3 0-0 9.0-0 Bb7 10.Qe2; 5...a6 6.Nc3 (6.a4 Nf6 7.Nc3 Bd6 8.Bd3 0-0 9.0-0 c4 10.Be2) 6...Nf6 7.Bd3 Bd6 8.e4 Nbd7 9.ed5 ed5 10.Qe2) 6.Be5 (6.c4 Nf6+/– 7.Nc3 a6 8.cd5 ed5 9.Qa4 Bd6 10.Bd3; 6.a4 Nf6 7.Nc3 Bd6 8.h4 e5 9.e4 d4 10.Nd5) 6...f6+= 7.Bg3 e5 (7...Ne7 8.Nc3+/– a6 9.a4 Kf7 10.Be2) 8.c4 d4 (8...Ne7 9.Nc3 Bf5 10.Nh4) 9.Bd3 (9.Ne5 fe5 10.Qf3) 9...Bd6?? (better is 9...Be6+/– 10.0-0) 10.Be4+- Ne7 (10...Na6 11.ba6 Ne7 12.Ba8 Qa8 13.Na3+-) 11.Ba8 0-0 12.0-0 Bg4 13.Qa4 Qd7 (13...Nd7 14.Be4 Qc7 15.Bd3+-) 14.Na3 Nf5 (14...Bf5 15.e4 Bg6 16.Nh4+-) 15.Qc2 Qe6 (15...Ng3 16.Bd5 Kh8 17.fg3 Qe7+-) 16.Bd5 Ng3 17.hg3 Qd5 18.cd5 Nd7 19.Nc4 Bb8 20.Rfe1 (20.Nh4 Be2+-) 20...Re8 21.Nh2 (21.ed4 Bf3 22.gf3 cd4+-) 21...Bh5 22.Qf5 1–0. tony – martinsen, internet, 2011.

4.Nf3 Nd7 A) 5.Nc3 A1) 5...Qa5 6.e3 (6.h4 Ngf6 7.e3 Bd6 8.Be2 0-0 9.0-0 e5 10.d3) 6...Ngf6 7.Bd3 Bd6 8.0-0 0-0 9.Be2 b6 10.d4; A2) 5...h6 6.e4 (6.e3 Ngf6 7.g3 Bd6 8.Bg2 e5 9.0-0 e4 10.Nh4) 6...d4 7.Na4 Ngf6 8.Bd3 Bd6 9.0-0 0-0 10.g3; A3) 5...Ngf6 6.e3 (6.Rb1 d4 7.Na4 a6 8.b6 e5 9.e4 Ne4 10.Bd3) 6...Bd6 7.Be2 0-0 8.0-0 Qa5 9.d4 h6 10.h3; B) 5.h4 B1) 5...Qa5 6.c4 (6.e3 Ngf6 7.Nc3 Bd6 8.Be2 0-0 9.h5 h6 10.Kf1) 6...Ngf6 7.e3 Bd6 8.h5 h6 9.Bd3 0-0 10.Qb3; B2) 5...h6 6.Nc3 (6.e3 Ngf6 7.Bd3 c4 8.Be2 Bd6 9.Nc3 0-0 10.d3) 6...Ngf6 7.e3 Bd6 8.Be2 0-0 9.d3 Ne5 10.Ne5; B3) 5...Ngf6 6.e3 (6.h5 h6 7.Nc3 Bd6 8.d3 d4 9.Ne4 Ne4 10.de4) 6...Bd6 7.Nc3 e5 8.h5 h6 9.Be2 0-0 10.0-0; C) 5.c4 C1) 5...Nb6 6.cd5 (6.Na3 Nf6 7.Qc2 Bd6 8.e3 0-0 9.Be2 Bd7 10.0-0) 6...ed5 7.Be5 Nf6 8.Nc3 Bd6 9.e3 0-0 10.Bd3; C2) 5...Ne7 6.Nc3 (6.e3 Nb6 7.Na3 Nf5 8.cd5 ed5 9.Qc2 Nh4 10.Nh4) 6...dc4 7.e3 Nb6 8.Ne5 Ng6 9.Nc4 Be7 10.Qh5; C3) 5...Ngf6 6.e3 (6.Nc3 Bd6 7.e3 0-0 8.Bd3 Nb6 9.cd5 ed5 10.0-0) 6...Bd6 7.Be2 0-0 8.0-0 Nb6 9.Na3 Bd7 10.Ne5; D) 5.e3 D1) 5...b6 6.Nc3 (6.Bd3 Ngf6 7.c4 dc4 8.Bc4 Bd6 9.Nc3 Bb7 10.0-0) 6...Ngf6 7.Bd3 Bd6 8.0-0 0-0 9.h3 Bb7 10.Re1; D2) 5...Nh6 6.c4 (6.Nc3 Nf6 7.h3 Be7 8.g4 d4 9.Ne2 Ne4 10.ed4) 6...Nb6 7.Na3 f6 8.Bd3 dc4 9.Bc4 Be7 10.Qb3; D3) 5...Ngf6 6.Nc3 (6.Be2 Bd6 7.Nc3 0-0 8.0-0 Qa5 9.d4 h6 10.h3) 6...Bd6 7.Be2 0-0 8.0-0 Qa5 9.d4 h6 10.h3.

4.Nf3 Nf6 A) 5.e3 A1) 5...Bd6 6.Nc3 (6.Be2 Nbd7 7.Nc3 0-0 8.0-0 Qa5 9.d4 h6 10.h3) 6...Nbd7 7.Be2 0-0 8.0-0 Qa5 9.h3 e5 10.d3; A2) 5...Be7 6.Be2 (6.Nc3 0-0 7.Bd3 Bd6 8.0-0 Nbd7 9.Rc1 Nb6 10.Re1) 6...0-0 7.0-0 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1; A3) 5...Nbd7 6.Nc3 (6.Be2 Bd6 7.Nc3 0-0 8.0-0 Qa5 9.d4 h6 10.h3) 6...Bd6 7.Be2 0-0 8.0-0 Qa5 9.g3 b6 10.d4; B) 5.g3 B1) 5...a6 6.Na3 (6.e3 ab5 7.Bb5 Nc6 8.Nc3 Bd6 9.0-0 0-0 10.Qe2) 6...Nbd7 7.Bg2 Bd6 8.0-0 0-0 9.d3 Qa5 10.c4; B2) 5...Bd6 6.Bg2 (6.Bh3 Nbd7 7.0-0 Qa5 8.c4 dc4 9.a4 Qb4 10.Qc1) 6...Nbd7 7.c4 a6 8.Na3 Nb6 9.ba6 Ra6 10.0-0; B3) 5...Nbd7 6.Bg2 (6.e3 Bd6 7.Nc3 0-0 8.Bg2 e5 9.Nh4 d4 10.Ne4) 6...Bd6 7.c4 a6 8.Na3 Nb6 9.ba6 Ra6 10.0-0; C) 5.h3 C1) 5...Nbd7 6.e3 (6.h4 Bd6 7.h5 e5 8.h6 gh6 9.d3 Ng4 10.Nc3) 6...Bd6 7.Be2 e5 8.0-0 e4 9.Nh4 Nb6 10.a4; C2) 5...a6 6.e3 (6.a4 Bd6 7.e3 ab5 8.Bb5 Nc6 9.Nc3 0-0 10.0-0) 6...ab5 7.Bb5 Nc6 8.0-0 Bd6 9.Nc3 0-0 10.Qe2; C3) 5...Bd6 6.e3 (6.a4 Nbd7 7.e3 0-0 8.Be2 e5 9.d3 Qe7 10.Nbd2) 6...0-0 7.Nc3 e5 8.d3 Nbd7 9.Nd2 Nb6 10.Qf3; D) 5.Nc3= D1) 5...Nbd7 6.e3 (6.Rb1 d4 7.Na4 e5 8.e3 e4 9.Ng5 h6 10.Nh3) 6...Bd6 7.Be2 0-0 8.0-0 Qa5 9.h3 e5 10.d3; D2) 5...Bd6 6.e3 (6.g3 0-0 7.Bg2 d4 8.Nb1 Nbd7 9.0-0 Nb6 10.Na3) 6...Nbd7 7.Be2 0-0 8.0-0 Qa5 9.d4 h6 10.h3; D3) 5...d4 6.Na4 (6.Nb1 Nbd7 7.e3 Nb6 8.ed4 Na4 9.Bc1 cd4 10.c3) 6...a6 7.b6 Nbd7 8.e3 Nb6 9.Nb6 Qb6 10.Rb1.

4.Nf3 Nh6 A) 5.e3 A1) 5...a6 6.Nc3 (6.a4 Nd7 7.h3 Nf5 8.Nc3 Bd6 9.e4 Ne7 10.ed5) 6...ab5 7.Nb5 Nc6 8.Bd3 f6 9.c4 Nf5 10.0-0; A2) 5...Nf5 6.Nc3 (6.Bd3 Nd7 7.Nc3 Nf6 8.h3 h6 9.0-0 Bd6 10.e4) 6...Nd7 7.Bd3 Nf6 8.0-0 Bd6 9.e4 c4 10.ef5; A3) 5...Nd7 6.h3 (6.Nc3 Nf6 7.Bd3 Bd6 8.h3 c4 9.Be2 0-0 10.0-0) 6...Nb6 7.a4 Nf5 8.a5 Nc4 9.Bc4 dc4 10.0-0; B) 5.Nc3 B1) 5...Bd7 6.e3 (6.a4 f5 7.e3 Bd6 8.Nd5 ed5 9.Bg7 Nf7 10.Bh8) 6...a6 7.a4 Bd6 8.Nd5 ed5 9.Bg7 Rg8 10.Bh6; B2) 5...a6 6.e3 (6.a4 Nd7 7.e3 Nf6 8.ba6 ba6 9.Rb1 Rb8 10.h3) 6...ab5 7.Nb5 Nc6 8.a4 f6 9.Nh4 Nf7 10.f4; B3) 5...Nd7 6.g3 (6.e4 d4 7.Na4 Bd6 8.Bd3 0-0 9.c3 dc3 10.dc3) 6...Nf6 7.Bh3 Bd6 8.e4 de4 9.Ng5 Be5 10.0-0; C) 5.g3 C1) 5...Nd7 6.Bg2 (6.Bh3 Nf6 7.0-0 Bd6 8.Be5 g5 9.Bd6 Qd6 10.Bg2) 6...Nf5 7.Nc3 a6 8.0-0 d4 9.Ne4 ab5 10.e3; C2) 5...Qa5 6.Nc3 (6.e3 Nd7 7.c4 Nf5 8.cd5 ed5 9.Qc2 Nd6 10.a4) 6...Nd7 7.e3 Nf6 8.Bd3 Bd6 9.0-0 0-0 10.a4; C3) 5...a6 6.e3 (6.Na3 Bd7 7.c4 ab5 8.Nb5 dc4 9.a4 Ng4 10.Bh3) 6...ab5 7.Bb5 Nc6 8.0-0 f6 9.a4 Be7 10.Nc3; D) 5.c4 D1) 5...Nd7 6.e3 (6.cd5 ed5 7.h3 d4 8.e3 Nf6 9.ed4 Be7 10.g4) 6...Nf6 7.Nc3 Bd6 8.cd5 0-0 9.Bc4 Re8 10.h3; D2) 5...d4 6.e3 (6.Na3 Bd6 7.e3 0-0 8.Bd3 Nd7 9.0-0 Nf5 10.Qc2) 6...Nd7 7.Bd3 Ng4 8.ed4 cd4 9.Qe2 Bd6 10.Bd4; D3) 5...a6 6.cd5 (6.Na3 ab5 7.Nb5 Nc6 8.e3 f6 9.a4 Be7 10.Bd3) 6...ab5 7.e4 b4 8.Bc4 Nd7 9.de6 fe6 10.Be6.

5.e3 ab5 6.ab5 Ra1 7.Ba1 b6 8.c4 Be7?? 9.Nf3?? (better 9.Bg7 Bf6 10.Bh8 Bh8 11.cd5 ed5 12.Nf3+-) 9...d4 (9...Bf6 10.d4=) 10.ed4+= cd4 (10...Bf6 11.Bd3+=) 11.Bd4+- e5?? (better 11...Nf6+-) 12.Be5+- Bf6 (12...Nf6 13.Bb8 0-0 14.Be5+-) 13.Bb8 Qe7 (13...Ne7 14.Bg3+-) 14.Be2 Nh6 15.0-0 0-0 16.Bg3 (16.Bf4 Nf5+-) 16...g6 (16...Nf5 17.Bf4+-) 17.d4 Bg7 (17...Nf5 18.Be5+-) 18.Nc3 Bf5 (18...Bb7 19.Be5+-) 19.Nd5 Qe8 (19...Qb7 20.Ne5+-) 20.Nb6 Qb8 (20...Qd8 21.c5 Bg4+-) 21.Bb8 Rb8 22.Nd5 (22.c5 Bg4+-) 22...Rd8 23.Ne7 Kf8 24.Nf5 gf5 25.d5 Rd6 26.c5 Rd8 27.d6 Rc8 28.c6 Rd8 29.d7 Be5 30.Re1 (30.Ne5 Kg7 31.c7 Rf8 32.d8Q f6 33.Qf8 Kf8 34.Qd7 fe5 35.c8Q) 30...Bc7+- 31.Bc4 Ng4 32.Qd5 Kg7 (32...Bh2 33.Nh2 Rd7 34.cd7 Kg7 35.Qf7 Kh6 36.d8Q Nh2 37.Qdf6) 33.Qf7 Kh6 34.Qf5 (34.Re6 Nf6 35.Rf6) 34...Kg7 (34...Bf4 35.Qf4 Kg7 36.Qg4 Kf6 37.Qg5) 35.Qg4 (35.Re7 Kh6 36.Qh7) 35...Kh8 36.Re8 Re8 37.de8Q (37.de8R?!=) 1–0. BeepBeepImAJeep (2560) – elijahnicholls, lichess.org, 2017.

5.e3 ab5 6.Bb5 Bd7 7.Nc3 Bb5 8.Nb5 Bd6?? (8...Nf6 9.Bf6 gf6 10.Nf3=) 9.Nf3 (9.Bg7 Qg5 10.Bh8 Qg2+-) 9...Nc6?? (9...Nf6 10.Bf6 gf6 11.0-0+=) 10.c4 (better 10.Bg7!? e5 11.d3 Kd7 12.Bh8 Nh6 13.Nd6 Qa5 14.Nd2 Kd6+-) 10...dc4?? (better 10...Nge7=) 11.Bg7+- Be5 12.Be5 (12.Ne5 Ne5 13.Be5 f6 14.Nd6 Ke7 15.Nb7 Qd5+-) 12...Ne5 (12...f6 13.Nd6 Kf8 14.Bg3+-) 13.Ne5 Nf6 14.Nc4 0-0 15.d3 (15.Qf3 Nd5+-) 15...Qd5 16.0-0 Kh8 (16...Rad8 17.Ra3+-) 17.Nc7 Qg5 (17...Qc6 18.Na8 Ra8 19.Ne5+-) 18.Na8 Ra8 19.h3 (19.Qf3 Nd5 20.Qf7 Rg8+-) 19...Rg8 (19...Ra7 20.Qf3 Qg7 21.Qf4+-) 20.g4 (20.Qf3!? Nd5+-) 20...Nh5 (20...Qh5 21.Qf3 Ng4 22.Kh1+- (22.hg4?! Rg4 23.Qg3 Qg6+-; 22.Qb7 Ne3 23.Kh2 Ng4 24.Kg3 Ne5 25.Kh2 Nf3 26.Qf3 Qf3-+)) 21.Kh2 (21.Rb1 Qd5+-) 21...Nf6 (21...f5 22.Rb1 Nf6 23.f4+-) 22.f3 (22.Qf3 Rd8 23.Qb7 Rd3 24.Qf7 Ng4 25.Kh1 Qf6 26.Qe8 Kg7+-) 22...h5 23.Rg1 (23.Rb1 Nd5 24.Rb7 Ne3 25.Ne3 Qe3 26.Qa1 e5 27.Rf7 Ra8+-) 23...hg4 24.fg4 Qh4 (24...Rd8 25.Rb1 Rd7 26.Qf3+-) 25.Qf3 e5 (25...Nh7 26.Qb7 Ng5 27.Rg3+-) 26.Ne5 Rg5 (26...Nh7 27.g5 c4 28.Qb7+-) 27.Nf7 (27.Qf6 Kg8 28.Raf1 Kh7 29.Nf7 Rf5 30.Qh4 Kg7 31.gf5 Kf8 32.Nd6 c4 33.Qf6) 27...Kh7 28.Ng5 (28.Qf6 Rg8 29.Qh4 Kg7 30.Raf1 Kf8 31.Nd6 Kg7 32.Rf7 Kg6 33.Qf6) 28...Qg5 29.a5 Nd5 30.h4! Qh4 31.Kg2 Nb4 32.Rh1 (32.Qf7 Kh8 33.Rh1 Qh1 34.Rh1) 32...Qh1 (32...Qh2 33.Rh2 Kg6 34.Qf5 Kg7 35.Rh7 Kg8 36.Qf7) 33.Rh1 Kg6 (33...Kg7 34.Qb7 Kg6 35.Qh7 Kf6 36.Rh6 Ke5 37.Qf5) 34.Qf5 Kg7 35.g5 (35.g5 Kg8 36.Rh7 Nd3 37.Qf7; 35.Rh7 Kg8 36.Qf7) 1-0. mitkosto – 605, Rated Classical game, lichess.org, 2013.

5.e3 Be7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4).

5.Nf3 Bd6 6.cd5!? ed5 7.Nc3 =+.

5.Nf3 Bd6 6.Bf6 gf6?! 7.cd5 ed5 8.Nc3 =.

5.Nf3 Bd6 6.Bf6 Qf6-/+ 7.Nc3 dc4!? 8.Ne4 Qd8 -/+.

5.Nf3 Bd6 6.Bf6 Qf6 7.Nc3 d4 8.Ne4 Qd8 9.e3 e5 10.ed4 ed4 11.Bd3 0-0 12.0-0 h6 13.Re1 b6?? (better is 13...Be7=) 14.Nd6+- Qd6 15.Be4 1–0. Taulien,Hans_Juergen (2350) – Mollitor,Jan (2000), remoteschach.de, 2002.

5.e3 Nf6 6.c4 (6.Nf3 Bd6=+) 6...d4 7.Nf3 e5 8.Qb3 (8.Qa4 Nd7 9.Qb5 a6-+) 8...Be7 (8...Bc5 9.ed4 Nd4 10.Bd4 ed4 11.Be2-/+) 9.Na3 (9.Be2 0-0-/+) 9...0-0 10.Be2 d3 11.Bd1 (11.Bf1 Qa5-/+) 11...e4 12.Nd4 a6 13.Rc1? (13.f3 Bc5 14.Nc6 bc6-/+) 13...Nd7?? (better is 13...Na5 14.Qc3 b5 15.Ndb5 ab5 16.cb5 Be6-+) 14.Ba1 (14.Rb1 Nc5 15.Qc3 Bf6-/+) 14...Qa5 15.Nb1 Qg5 16.g3 Nde5 17.f4=+ ef3 18.Nf3 Qf5 19.Be5 Ne5 20.Ne5 Qe5 21.Qd3 Bf5 22.Qd4 Qd4=+ 23.ed4 Bf6 24.d5 Rfe8 25.Kf2 Bd4 26.Kg2 Bb2 27.Rc2 Be4 28.Kh3 Bd4 29.Rf1 Rad8 30.Rc1-/+ Rd6 31.Bf3 Bf3-/+ 32.Rf3 Rh6 33.Kg4 Rh2 34.Rff1 h5-+ 35.Kf3 g5 36.Rh1?? Rf2 0–1. Deregowski,Richard – Olbrich, Recklinghausen op, 1994.

5.Nf3 Nf6 6.g3 Be7 7.Bg2 0-0 8.0-0 Bd7 9.d3 Qc7 10.Nbd2 h6 11.c4 dc4 12.Nc4 b5 13.Nce5 Ne5 14.Be5 Qb6 15.Qb3 Nd5 16.e4 Nf6 17.Rac1 a5 18.a3 b4 19.ab4 a4 20.Qa2 Qb4 21.Rb1 Qa5 22.Rfc1 Bd8 23.Bd6 Re8 24.Ne5 Bb6?? (better is 24...Be7 25.Nd7 Bd6+=) 25.Nc4+- (25.Nd7 Nd7 26.e5 Ra7+/–) 25...Bf2 26.Qf2 Qh5 27.Nb6 Ra6 28.e5 (28.Nd7?! Nd7 29.Bf3 Qg5+-) 28...Ng4 29.Qf4 Qh2 30.Kf1 Qh5 (30...Rb6 31.Rb6 (31.Qg4?! Rb1 32.Rb1 Rc8+-) 31...f5 32.Rc7+-) 31.Nd7 Qg6 (31...a3 32.Nb8 Ra7 33.Nc6+-) 32.Nc5 Raa8 (32...Ra7 33.Rc4 h5 34.Ra4 Ra4 35.Qa4 (worse is 35.Na4 Qd3 36.Kg1 Qb1 37.Qf1 Qc2-/+) 35...Qf5 36.Qf4 Qf4 37.gf4 Ne3 38.Kf2 Ng2 39.Kg2+-) 33.Bh3 (better is 33.Rc4 f5 34.Ba8 Ra8 35.Ra4 Ra4 36.Rb8 Kh7 37.Qa4 Qh5+-) 33...h5 34.Bg4 (34.Na4?! Qd3 35.Kg1 Ra4+-) 34...hg4 35.Kg2 a3 36.Rf1 a2 37.Ra1 Qh5 38.Rh1 Qg6 39.Rh4 Ra3 (39...Qf5+-) 40.Rg4 Qf5 41.Qf5 (better is 41.Nd7 f6 42.Nf6 Kf7 43.Ne8+-) 41...ef5 42.Rf4 g6 (42...f6 43.ef6 gf6 44.Rf5 Re2 45.Kf3+-) 43.Rf2 (43.Nd7 Rc8 44.Ba3 Rc2 45.Rf2 Rc3 46.Rfa2 Rc8+-) 43...Rea8 44.Kf3 g5 (44...R3a5 45.d4+-) 45.Be7 R8a5 (45...Kh7 46.Bg5 Kg6 47.Be3+-) 46.Rh2 (better is 46.Bf6 Ra6 47.Na6 Kf8 48.Rh2 Ke8 49.Nc5 Rd3 50.Ke2 Re3 51.Ke3 f4 52.Kd3 fg3 53.Rh8) 46...Rc3 (46...f6 47.ef6 Rc3+-) 47.Bf6 g4 (47...Rd3 48.Nd3 g4 49.Kf2 Re5 50.Rh8) 48.Kf4 (48.Kf4 Ra4 49.Kg5 Rc5 50.Rh8) 1–0. averoes (2445) – chessleon (2040), net–chess.com, 2011.

4.e3 (--> 3.e3 c5 4.b5).

4.e3 b6 5.a4 Bb7 6.Nf3 Nd7 7.c4 Ngf6 8.Be2 Bd6 9.0-0 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

4.e3 c4 5.a4 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.a4 e6 4.b5 c5 5.e3 c4).

4.e3 Nf6 5.c4 b6 6.d4 Bb7 7.Nf3 Nbd7 8.Be2 Bd6 9.0-0 0-0 10.a4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 10.d4).

4.e3 Nf6 5.Nf3 Bd6 6.Be2 Nbd7 7.0-0 0-0 8.c4 b6 9.a4 Bb7 10.d4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 10.d4).

4.a4 Bd6 5.Bg7 Qe7 6.Bh8 Bc5 7.e3 Bd7 8.Bd4 Bd4 9.ed4 e5 10.de5 Qe5 11.Qe2 Qe2 12.Be2 c5 13.Nf3 b6 14.0-0 Be6 15.Re1 Nd7 16.Ng5 h6 17.Ne6 fe6 18.Bg4 e5 19.f4 e4 20.d3 Ndf6 21.de4 Ng4 22.ed5 Kd7 23.c4 Rf8 24.h3 N4f6 25.Kf2 Ne7 26.Nd2 Nf5 27.Ne4 Ne4 28.Re4 Nd4 29.g3 Kd6 30.Rae1 h5 31.Re7 h4 32.Ra7 hg3 33.Kg3 Rg8 34.Kf2 Rh8 35.Ra6 Rh3+- 36.Rb6 Kd7 37.Ree6! Ne6 38.Re6 Ra3 39.Rc6 1–0. tanto – tomy (1760), net–chess.com, 2001.

4.a4 Bd7 5.e3 (--> 4.e3 Bd7 5.a4).

4.bc6 Nc6 5.e3 Nf6 =+.

5.e3 Bd7 6.c4 dc4 7.Bc4 cb5 8.ab5 Qb6 9.Nf3 (9.Bd4 Qd8 10.Ba7+-) 9...Bb5? (9...Nf6 10.Qe2+=) 10.Qb3 (better 10.Bd4 Qc6 11.Ne5 Bc4 12.Nc6 Nc6 13.Na3+-) 10...Bc4?? (better 10...Ba6 11.Qb6 ab6=) 11.Qb6+- ab6 12.Ra8 Bd6 1–0. BeepBeepImAJeep – IgorIgorIgorIgorIgor, lichess.org, 2017.

5.e3 Nd7 6.Nf3 Bb4?? (better 6...Ngf6=) 7.Bg7+- Nb6 (7...Ngf6 8.Bh8 Ne4 9.Nd4 cb5 10.f3+-) 8.Bh8 f6 (8...Ne7+-) 9.Nd4 Bd7 10.Qh5 Ke7 11.Qh7 Kd6 12.c3 (12.Nb3!? Bd2 13.N1d2 Qb4+-) 12...Bc5 13.Nb3 (13.Nb3 Qa4 14.Ra4 Na4 15.bc6 Bc6 16.Na5+-) 1–0. Tirado Parra,Alberto (1920) – Lopez Ziegler,Juan Jose, Championship de Madrid Individual Absol, 2013.

5.c4 ab5 6.ab5 Ra1 7.Ba1 Qa5 8.Nc3? (8.Bc3 Qd8=) 8...Bb4 (8...dc4 9.Ne4 f6-/+ (9...Qb5 10.Bg7 Qd5 11.Nc3 Bg7 12.Nd5 cd5 13.Qa4 Nc6 14.e3+-)) 9.e3= Nf6 10.Nf3 0-0 11.Be2 (11.Bb2 dc4 12.Bc4 Bd7=) 11...Nbd7 (11...dc4 12.Bc4 Bd7 13.bc6 Bc6 14.0-0=+) 12.bc6 bc6 13.0-0 Nc5 (13...Ba6 14.Nd4 Rc8 15.Nb3=+) 14.cd5 (14.Qc2 Nce4=) 14...cd5 15.Qc2 Ba6 16.Ba6 Qa6 17.Bb2 (17.Na2 Ba3 18.Bf6 gf6=) 17...Nce4 (better 17...Nd3!?=+) 18.Ne4= Ne4 19.d3 (19.Bg7 Kg7 20.Qb2 Bc3 21.dc3 Qc4=) 19...Nf6 (19...Nc5 20.Rd1 Rc8 21.Qb1=) 20.Ra1 Qb5 (20...Qc8 21.Qd1+=) 21.Rb1 Qa5 22.Qb3 Be7 23.h3 (23.Qb7 Bd6 24.Bf6 gf6+=) 23...h6 (23...Rc8 24.Ne5=) 24.Bc3 (24.Qb7 Qd8+=) 24...Qa6 25.Be5 Nd7 26.Bd4 (26.Ra1 Qc6=) 26...Bf6 (26...Rb8 27.Qc2 Rb1 28.Qb1 Bd6=) 27.Qb7 (27.Bf6 Nf6 28.Ne5 Qd6=) 27...Qb7 (better 27...Qd3!? 28.Ra1 Bd4 29.Nd4 Ne5-/+) 28.Rb7= Bd4 29.Nd4 (29.Rd7 Bc3=) 29...Nf6 (better 29...Nc5 30.Rc7 Nd3-/+) 30.Nc6 Re8 (30...g5 31.Kf1+=) 31.g4 (31.f4+-) 31...Kh7 (31...e5 32.d4 ed4 33.Nd4+=) 32.f4 (32.Ne5 Ng8+-) 32...Kg6? (better 32...Rc8!? 33.Ne5 Rc1 34.Kf2 Rc2 35.Kf3 Rh2+-) 33.Kf2 Rc8?? (33...Kh7 34.Ne5+-) 34.Ne5 (better 34.Ne7 Kh7 35.Nc8+-) 34...Kh7 35.Rf7 Rc3 (better 35...Rc2 36.Kg3 Kg8+-) 36.Re7 Rd3 (36...Rc2 37.Kg3 Kg8+-) 37.Nd3 Ng4 (37...h5+-) 38.hg4 (38.hg4 Kg8 39.Nc5+-) 1–0. BeepBeepImAJeep (2515) – San_009 (2075), lichess.org, 2017.

5.c4 ab5 6.ab5 (6.cb5 Nf6=+) 6...Ra1-/+ 7.Ba1 cb5 (7...dc4 8.Qa4-/+) 8.cb5 (8.cd5 ed5 9.e3 Qa5=) 8...Bd7 (8...Nf6 9.Nf3=) 9.e3= Bb4?? (better 9...Nf6=) 10.Bg7+- Qb6 (10...Qa5 11.Qc2 Ne7 12.Bh8 Bb5 13.Bb5 Qb5 14.Qh7+-) 11.Nc3 (11.Qa4 Bd6+-) 11...Bc3 12.dc3 Bb5 (12...Qa5 13.Bh8 Bb5 14.Bb5 Qb5 15.Qc2+-) 13.Bb5 (better 13.Qb3+-) 13...Qb5 14.Ne2 Ne7 (14...Nc6 15.Bh8 Nge7 16.0-0+-) 15.Bh8 Ng6 (15...Nd7 16.0-0+-) 16.Bf6 (16.Bg7 Qc4+-) 16…Nd7 1–0. DEFFM – humanwarnings, freechess.org, 2016.

5.c4 dc4 6.ba6 Na6 7.Nf3-/+.

5.e3 Bd7 6.Nc3 Bb4 7.Nd5!+/- cd5?? (7...cd5 8.Bg7 Combination; 7...ed5 8.Bg7 Combination) 8.Bg7+- ab5 9.ab5 Ra1 10.Ba1 (better 10.Qa1 Qb6 11.Qb2+-) 10...Nf6-/+ 11.Qf3 Be7 12.Be5 Rg8 13.Bd3 Bc8?? (13...Ng4 14.Bg3 Rg5 15.Qe2-/+) 14.Bh7?? (better 14.Bb8 Bd7 15.Be5+-) 14...Nh7-/+ 15.Bb8 Bd7 16.Bg3 Bb5 17.Qd1 Bc6 18.Ne2 Ng5 19.0-0 Ne4 20.Bf4 Bd6 21.Bd6 Qd6 22.f3 Ng5 23.Qa1 Ke7 24.h4 Nh7 25.g4 f5 (25...Nf6!? 26.Qb2-+) 26.g5-/+ Ng5 27.hg5 (27.hg5 Rg5 Decoy) 27...Rg5 28.Kf2 Qh2 29.Ke1 Rg2 30.Qa3 Kd7 31.Nd4 (better 31.Qd3 Qh4 32.Kd1=+) 31...Bb5?? (better 31...e5 32.Nf5 Re2 33.Kd1 Rd2 34.Kc1 Rc2 35.Kb1 Kc7=) 32.Nb5= Re2 33.Kd1 Rd2 34.Kc1 Rc2 35.Kb1 Qe2?? (better 35...Rc6 36.Qd3 Rc4=) 36.Qd6+- Ke8 37.Qe6 Kd8 (37...Kf8 38.Qf5 Ke8 A) 39.Qc2?! Qf1 (worse 39...Qb5 40.Ka2 Qf1 41.Qc8 Ke7 42.Qb7 Kd6 43.Qb8 Kd7 44.Qa7 Ke6 45.Qb6 Kd7 46.f4+/-) 40.Kb2 Qb5 41.Ka3 Kd8=; B) 39.Qe5 Kf8 40.Rh1 Qb5 41.Kc2 Qe2 42.Kc3 Qc4 43.Kd2 Qa2 44.Kc1 Qc4 45.Kd1 Qd3 46.Ke1 Qb1 47.Ke2 Qh1 48.Qd6 Kg7 49.Qd5+/-) 38.Qd6 (better 38.Qd5 Kc8 39.Qe6 Kd8 40.Qd6 Ke8 41.Qe5 Kd7 42.Rh1 Rb2 43.Qb2 Qb2 44.Kb2+-) 38...Kc8 (38...Ke8 39.Qe5 Kf8 40.Qf5 Ke7 41.Qe5 Kf8+-) 39.Qe6 (39.Na7) 39...Kd8+- 40.Qd5 Kc8 41.Qf5 Kb8 (41...Kd8 42.Qf8 Kd7 43.Qd6 Ke8 44.Qe5 Kd7+-) 42.Qf8 (42.Qe5 Rc7 43.Qc7 Ka8 44.Qd8) 42...Rc8 43.Qf4 Ka8 44.Qa4 (44.Qa4 Kb8 45.Qa7) 1-0. dododa - segooox (1835), Rated Classical game, lichess.org, 2013.

5.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 c6).

5.Nf3 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3).

5.ab5 a6 6.e3 ab5 7.Ra8 Na6 8.Bb5 Ke7 9.Ba3 Kf6 10.Qf3 Kg6 11.Qg3 Kf6 (11...Kh6 12.Nf3 g6 13.Bb2+-) 12.Qf4 (better 12.f4 h6 13.Qh4 g5 14.fg5 hg5 15.Bb2 e5 16.Qh8 Bg7 17.Be5 Ke5 18.Qg7 Kd6+-) 12...Kg6 13.h4 (13.Nf3!? h6 14.Ne5 Kh7 15.Nf7 Qc7 16.Bd3 g6+-) 13...h5 14.Nf3 Qf6 (14...Ba3 15.Ne5 Kh7 16.Nf7+-) 15.Qf6 (15.Bd3 Qf5 16.Bf8 Kh7 17.Bf5 ef5 18.Qg3 g5 19.Qg5 Nf6 20.Qg7) 15...Kf6+- (15...gf6?? 16.Bf8 e5 17.Rc8+-) 16.Rc8 Ba3 17.Na3 Nc5 18.Rc5 Ne7 19.Rc7 (better 19.Ke2 Ra8 20.Ra1 Nc8+-) 19...Kg6 20.d4 (better 20.Re7 e5 21.Re5 Kf6+-) 20...Kh7 21.Re7 g6 22.Ng5 Kg8 23.Rf7 Rh7 (23...Rh6 24.Rh3 Rh7 25.Rh7 e5 26.de5 b6 27.e6 d4 28.e7 de3 29.e8Q) 24.Be8 (24.Rh7 e5 25.de5 d4 26.e6 de3 27.e7 ef2 28.Kf2 b6 29.e8Q) 24...Rg7 25.Rg7 Kg7 26.Bf7 (26.Ne6 Kf6 27.Nf4 b6+-) 26...Kf6 27.Be6 Ke7 28.Bd5 Kd6 29.Be4 Kc7 30.Bg6 Kb6 31.Bh5 Ka5 32.Be2 b5 33.Nb1 (33.Nb5 Kb6 34.h5 Kb7 35.h6 Ka6 36.h7 Kb7 37.h8Q Kb6 38.Qd8 Kc6 39.Rh6 Kb7 40.Bf3) 33...b4 34.Kd2 Ka4 35.Kc1 (35.Nc3 bc3 36.Kc3 Ka5 37.Rb1 Ka4 38.Ra1) 35...b3 36.Kb2 bc2 37.Kc2 (37.Nc3 Ka5 38.Nd5 c1Q 39.Rc1 Ka4 40.Ra1) 37...Kb4 (37...Ka5 38.h5 Kb6 39.h6 Kc6 40.h7 Kc7 41.h8Q Kd7 42.Rh7 Kc6 43.Qf6 Kd5 44.e4) 38.Kd3 (38.Nc3 Ka5 39.Nd5 Ka4 40.Ra1) 38...Ka5 39.Nd2 Kb6 40.g4 Kc7 41.h5 Kd8 42.h6 Kd7 43.h7 Ke7 (43...Kc7 44.h8Q Kd7 45.Rh7 Kc6 46.Qb8 Kd5 47.Bf3) 44.h8Q Kd6 (44...Kd7 45.Rh7 Kc6 46.Qb8 Kd5 47.Bf3) 45.Qh6 (45.Rh6 Kd7 46.Qg7 Ke8 47.Rh8) 45...Kd7 (45...Kc7 46.Rc1 Kb7 47.Bf3 Ka7 48.Rc7 Kb8 49.Qb6) 46.Qg6 Kd8 47.Qf5 (47.Qf7 Kc8 48.Rh8) 47...Kc7 48.Rh7 Kd8 (48...Kb6 49.Nc4 Kc6 50.Bf3) 49.Qg6 (49.Qg6 Kc8 50.Qe8; 49.Qd7) 1–0. BeepBeepImAJeep (2650) – Lord_axe (1860), lichess.org, 2017.

5.ab5 Qb6 6.e3 Bd7 7.Bd4 Qd6 8.Nf3 (8.Ba7 b6+-) 8...Nf6 (8...a6 9.Ne5+=) 9.Be2 (9.Ra7 Ra7 10.Ba7 b6+-) 9...Be7 (9...a6 10.Nc3+=) 10.0-0 (10.Ba7 b6+=) 10...0-0 (10...a6 11.Ra4+=) 11.c4 (11.Ra7 Ra7 12.Ba7 b6+-) 11...dc4 12.Bc4 a6 (12...Rc8 13.Ne5 Be8 14.d3+=) 13.Nc3 Bc8 14.Be5 Qc5 (14...Qb6 15.ba6 ba6 16.Rb1+=) 15.Ra4 (15.Qe2 Nbd7 16.d4 Qb6+-) 15...Nbd7+= 16.d4 Qb6 17.Bf4 (17.Bd3 Ne5 18.Ne5 Nd7+-) 17...Bd6 (17...Qd8 18.ba6 ba6 19.d5 ed5 20.Bd5+=) 18.Bg3 (18.Bd6 Qd6 19.Bd3 Nb6+=) 18...Bg3 19.hg3 (19.fg3 Qc7 20.ba6 ba6=) 19...Re8 (19...Qc7 20.ba6 ba6 21.Rb4=) 20.e4 (20.Qc2=) 20...e5 (20...Qc7!? 21.e5 Nb6 22.ef6 Nc4=) 21.Qb3+- ed4 (21...Re7!? 22.Bf7! Kf8 23.ba6 Qb3 24.Bb3 ba6+-) 22.Bf7+- Kf8 (better 22...Kh8 23.Be8 dc3 24.Bd7 Bd7+-) 23.Be8 Ke8 24.Ng5 (better 24.Rd4 Nc5 25.Qc2+-) 24...dc3 (24...Ne5 25.Nd5 Qc5+-) 25.Qf7 Kd8 26.Ne6 (26.Ne6 Qe6 27.Qe6+-) 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.ab5 Be7 6.e3 f6 7.c4 Nd7 (7...Nh6 8.cd5 Qd5 9.Nc3+=) 8.Nf3 (8.cd5!? e5 9.d4+-) 8...Nh6 9.cd5 ed5 10.Nc3 0-0? (better 10...Nb6!?=) 11.Nd5+- Ne5? (better 11...Bd6+-) 12.Ne7+- (12.Be5?! Qd5 13.Bd4 a5+-) 12...Qe7 13.Ne5 fe5 14.Be2?? (better 14.Ba3 Qf6 15.Bf8 Kf8 16.d4+-) 14...Bg4?? (better 14...Nf7+-) 15.Bg4+- Ng4 16.Qg4 Qf6 (16...Rfe8 17.0-0+-) 17.0-0 (17.f4 Rf7+-) 17...Rae8 (17...Rf7 18.Qe4+-) 18.d4 (18.Ra7 Qb6 19.Qc4 Kh8+-) 18...ed4 (18...Qb6 19.Qe2 e4 20.Ba3+-) 19.Bd4 Qg6 (19...Qf7 20.Ra7 Rd8 21.Bc5+-) 20.Qg6 hg6 21.Ra7 Re7 (21...Rf7 22.Rc1+-) 22.Bc5 b6 (22...Rd7 23.Bf8 Kf8+-) 23.Be7 Rf7 24.Ra8 (24.e4 g5+-) 24...Kh7 25.Bg5 Rf5 26.Bf4 (26.Rd1!? Rf2 27.Rh8 Kh8 28.Kf2 Kh7+-) 26...g5 27.Bg3 g4 28.Ra7 (better 28.Rb1 Rf6+-) 28...Rb5 29.Rd1 Rg5 30.h3 (better 30.Rb1 Rc5+-) 30...Kh6 31.Rd6 (31.Bf4 Kh5 32.Bg5 Kg6 33.Rd6 Kg5 34.Rg7 Kf5 35.hg4 Ke5 36.Rgg6 b5 37.Rge6) 31...g6 32.Bf4 Kh5 (32...gh3 33.f3 h2 34.Kh2 b5 35.Rd8 b4 36.Rh8) 33.Ra8 (33.Rh7) 33...Rf5 (33...gh3 34.Rh8 Kg4 35.f3 Kf5 36.Rf8) 34.Rh8 1–0. BeepBeepImAJeep (2590) – WashingtonMS (1875), lichess.org, 2017.

5.ab5 Nf6 6.Nf3 =.

6.e3 Qb6 7.c4 dc4= 8.Bc4 Bb5 9.Bb5 (9.Qb3!? Ba6 10.Qb6 ab6 11.Nf3=) 9...Qb5=+ 10.Qc2 (10.Ba3 Nf6=+) 10...Nc6 11.Nc3 Qb6 (11...Qg5!? 12.g3 Nf6-/+) 12.Nf3 a6 13.Na4 (13.0-0 Nb4 14.Qb3 Nd5=) 13...Qc7 (13...Qb5!? 14.Nc3 Nb4 15.Nb5 Nc2 16.Kd1 Na1 17.Nc7 Kd8 18.Na8 Nb3=) 14.0-0 e5 (14...b5 15.Be5 Qb7 16.Nc5=) 15.Ng5 (15.Be5 Qd8+/–) 15...f6 (better is 15...Nf6=+) 16.Ne6+/– Qd6 (16...Qf7 17.Nb6 Rb8 18.Qc4+/–) 17.Nf8 (17.Nb6 Qe6 18.Na8+/–) 17...Kf8? (better is 17...Qf8 18.Nc5 Qf7+=) 18.Ba3+- Nb4 19.Qb3 a5 20.Nc3 (better is 20.Nc5 Rb8 21.Bb4 ab4 22.Ne6 Ke7 23.Ng7+-) 20...Ne7?? (better is 20...Rd8 21.d4 Ne7+/–) 21.Ne4 (21.Bb4 Qd8 22.Ba3 b5 23.Nb5 Rb8+-) 21...Qb6?? (better is 21...Qd5!? 22.Qb2 Nec6=) 22.d4 (22.Bb4 Ke8+-) 22...ed4 23.ed4 (23.Bb4 Qc6 24.ed4 a4 25.Be7 Ke7 26.Qb4 Kd8+-) 23...Qd4?? (better is 23...Rd8 24.Nc5 Ned5+/–) 24.Ng3 (better is 24.Bb4 Qe4 25.Rfe1 (25.Ra5?! Ra5 26.Ba5 Qd5 27.Qd5 Nd5+-; 25.Ba5?! Qd5 26.Qb4 Kf7+=) 25...Qe1 26.Be1+-) 24...Nec6 (24...Qd5 25.Qb2 Kf7=+) 25.Bb2 (better is 25.Rfd1!? Qg4 26.f3+=) 25...Qd5-/+ 26.Qd5 (better is 26.Qa3!?-/+) 26...Nd5-+ 27.Nf5 Rd8 (27...a4 28.Rfd1 Ndb4 29.Ba3-/+) 28.Ba3 Ndb4 29.Ne3 Kf7 30.Nc4 (30.Bb4 ab4 (30...Nb4?! 31.Ra5 Nc6 32.Rb5-/+) 31.Rfb1 Rd2-+) 30...Nc2 31.Rad1 (31.Ra2 Na3 32.Ra3 b5 33.Na5 Ra8-+) 31...Na3 (31...Kg6!? 32.Bc5 b5 33.Nd6-+) 32.Na3 Rd1 (32...a4 33.Nb5-+) 33.Rd1 Rd8 34.Rb1 (34.Rd8 Nd8 35.Kf1 Ke6-+) 34...Rb8 (34...Rd3 35.Nb5-+) 35.h3 (35.Kf1 b6-+) 35...Ke6 (better is 35...b6-+) 36.Nc4? (36.Kf1 Kd5-+) 36...Kd5 (better is 36...b5 37.Re1 Kd5 38.Ne3 Ke4 39.f3 Kd3-+) 37.Nb6 Kc5?? (better is 37...Ke4-+) 38.Nd7+/– (38...Kc4 39.Nb8 Nb8 40.Rb7+/–) 1–0. stoker – henroo1, Live Game Caissa's Web, 2004.

6.e3 Qb6 7.c4 dc4 8.Bc4 Bb5 9.Bd4 Qc6 10.Bb5 Qb5 11.Nf3 (11.Nc3 Qd7 12.Na4 Na6 13.Nf3 f6 14.0-0 Nh6 15.Qb3) 11...Nd7 (11...Nf6 12.Nc3 Qc6 13.0-0 Nbd7 14.Bf6 gf6 15.Nd4) 12.Nc3 Qc6 (12...Qc4 13.Qb1 Qc6 14.0-0 Ngf6 15.Rc1) 13.0-0 (< 13.Ra7 Ra7 14.Ba7 Ngf6= 15.0-0) 13...Nh6 (13...Ngf6 14.Bf6 (< 14.Ba7 b6= 15.Qe2; < 14.Ra7 Ra7 15.Ba7 b6=) 14...gf6 15.Nd4+/–; 13...a5 14.Qb3 Ne7 15.Rab1) 14.e4 (14.Qe2 Nf5 (14...a5 15.Rfc1) 15.Rfc1 Bc5 16.Bc5 Nc5+-) 14...Ng4+/– 15.Qb3 (15.Qe2 Bc5+=; 15.Rc1+/–) 15...b6 (15...Bd6!? 16.Nb5 0-0+/–) 16.h3 Ngf6 17.Rfc1 Bc5? (17...Be7 18.Nb5 Nc5 19.Bc5 bc5+-) 18.Bf6+- Nf6 19.d4 Be7 20.Nd5 Qc1 21.Rc1 ed5 22.e5 Ne4 23.Qb5 Kf8 24.Qd5 Ng5 25.Qa8 (25.Qa8 Bd8 26.Qd8) 1–0. kornel – andy, private, 2011.

6.e3 Qb6 7.Bd4!? Qd6 8.Ba7 +/–.

6.e3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 cb5 6.ab5 Bd7).

5.e3 c5 6.c4 Bb7 (6...Nf6 7.Nf3=) 7.Nf3 Nd7 (7...Nf6 8.cd5 ed5 9.Be2=) 8.Be2 (8.cd5 ed5 9.Be2 Ngf6=) 8...Ngf6 9.Nc3 (9.cd5 Nd5 10.0-0 N7f6=) 9...g6 (9...dc4 10.Bc4 Bd6 11.0-0=) 10.0-0 (10.cd5 ed5 11.0-0 Bg7+=) 10...Bg7 (10...dc4 11.e4=) 11.Qb3 (11.d3 0-0=) 11...dc4= 12.Qc4 0-0 (12...Bf3 13.Bf3 Ne5 14.Qe2 Nf3 15.Qf3=) 13.Rfd1 (13.d4 Rc8 14.Rac1 cd4 15.Qd4 Nd5=) 13...Bf3 14.Bf3 Ne5 15.Qe2 Nf3 16.Qf3 Qd3 17.Ne2 Qe4 (17...Nd5 18.Bg7 Kg7 19.Nc1=) 18.Qe4 Ne4 19.Bg7 Kg7 20.d3 (20.Nc3 Nd6=) 20...Nf6 (20...Nd6 21.Nc3=) 21.Rac1 (21.a5 a6 22.ab6 ab5=) 21...a6 (21...Rfd8 22.Kf1=) 22.d4 ab5 23.ab5 Ra2 (23...cd4!? 24.Nd4 Ra2=) 24.Nc3+= Rb2 25.dc5 bc5 26.Rb1 Rb1 (26...Rb4 27.Kf1=) 27.Rb1 Nd5 28.Ne4 (28.Na4 c4+=) 28...c4 (28...Rb8 29.Nc5 Nc3 30.Rb3 Rb5 31.Rb5 Nb5 32.f4=) 29.Kf1 (29.b6 Rb8 30.b7 c3+=) 29...Rb8 30.Ke1 f5 (30...c3 31.Kd1 f5 32.Ng3=) 31.Nd6 (31.Nc5 Kf7=) 31...c3 32.Kd1 (32.e4 fe4 33.Rc1 e3 34.fe3 Rb6=+) 32...Rd8=+ 33.Nb7 Ne3 34.Ke2 Rd2?? (better 34...Rb8 35.Ke3 c2-/+ (worse 35...Rb7 36.Kd3+=)) 35.Ke3+- f4 (35...Rb2 36.Rc1 Rb5 37.Nd8 Re5 38.Kf3+-) 36.Kf4 (better 36.Kf3 Rb2 37.Rc1 Rb5 38.Nd6+-) 36...Rd4?? (better 36...Rf2 37.Ke3 Rg2+-) 37.Ke3 c2 (37...Rd5 38.b6+-) 38.Rc1 Rd7 (38...Rd5 39.Rc2 Rb5 40.Nd6 Re5 41.Kf4+-) 39.Nc5 Rc7 1–0. Pohl,M – Janke,Georg, Oberschwaben–chB, 1994.

5.e3 c5 6.c4 Nf6 7.Nf3 Bd6 8.Be2 Qc7 9.cd5 ed5 (9...Nd5 10.Na3=) 10.Nc3 (10.Bf6!? gf6 11.d4+=) 10...Be6 11.Rc1 h6 12.d3 Nbd7 13.h3 0-0 14.0-0 Rfe8 15.Qc2 Bf5 16.Nh4 Bh7 17.Qd2 d4 18.ed4? (better 18.Nd1=) 18...Bh2-+ (18...cd4?! 19.Nd5 Bh2 20.Kh1=) 19.Kh1 Bf4 (19...cd4?! 20.Ne4 Qf4 21.Nf6 Nf6 22.Qd1 Qh4 23.Kh2=) 20.Qc2 Bc1 21.Rc1 cd4 22.Ne4 Qc2 (22...Ne4?? 23.Qc7 Nf2 24.Kg1 Re2 25.Qd7+- (25.Bd4?! Nd3 26.Rc6 Re7+-)) 23.Nf6 (23.Rc2? Ne4 (23...Be4?! 24.de4 Re4 25.Nf5-+) 24.de4 Re4-+) 23...Nf6 24.Rc2 Nd5 25.Bf3 Bd3 26.Bd5?? (better 26.Rd2 Be4 27.Bd4-+) 26...Bc2 27.Ba8 Ra8 28.Bd4 Ba4 29.Nf5 f6 (worse 29...Bb5 30.Ng7 Kh7 31.Nf5-+) 30.Ne7 Kf8 31.Ng6 Kf7 (31...Kf7 32.Nh4 Bb5-+) 0–1. GuestPYCL – GuestNKZM, freechess.org, 2017.

5.e3 a6 6.c4 ab5 7.a5?? (7.ab5 Ra1 8.Ba1 Nf6=) 7...b6?? (better 7...bc4 8.Bc3 Nc6-+) 8.cb5 (8.cd5!? c4 9.de6 Be6 10.Qh5 ba5 11.Qb5 Nd7 12.Bc3+= (12.Bc4? Rb8-+)) 8...ba5-/+ 9.Nf3 Qb6 (9...Nf6 10.Be2-/+) 10.Nc3=+ Bd7 The isolani on b5 becomes a target (10...Nf6 11.Na4 Qb7 12.Ba3=+) 11.Na4= Qb7 (11...Qc7 12.Be5 Qa7 13.b6=) 12.Rb1 (better 12.Nc5 Qc8 13.b6 (worse 13.Nd7 Nd7 14.b6 Ngf6+-) 13...Qc5 14.b7+-) 12...Be7?? (better 12...c4 13.Nc5 Qb6=) 13.Bg7+- Bf6 14.Bh8 Bh8 15.Nc5 Qc7 (15...Qb6 16.Na4 Qb7 17.d4+-) 16.Nd7 (16.Qc2 Nf6+-) 16...Qd7 (16...Nd7 17.d4+-) 17.Be2 (17.Qc2 Ne7+-) 17...Ke7 18.0-0 Qd6 19.d4 Nd7 20.Rc1 Rb8 (20...Ngf6 21.Rc6 Qb8 22.Ra6+-) 21.Rc6 Qb4 22.Qa1 Kf6 23.Rb1 Ne7 (23...Qf8+-) 24.Rb4 ab4 (24...Nc6 25.bc6 ab4 26.cd7+-) 25.Rc1 (better 25.Rc7 Nf8 26.Qa7+-) 25...Nc6 (25...Nc8+-) 26.bc6 Nb6 27.c7 (better 27.Qa7 Re8 28.Qb6+-) 27...Nc4 28.cb8Q Bg7 (28...e5 29.Qd8 Ke6 30.Qa7 Nb6 31.Ng5 Kf5 32.Qf7 Bf6 33.Qdf6) 29.Qf4 Kg6 (29...Ke7 30.Qa7 Ke8 31.Qfb8) 30.Qg5 1–0. BeepBeepImAJeep (2585) – vivek_bhai, lichess.org, 2018.

5.e3 b6 6.Nf3 Nf6!? =.

5.e3 b6 6.f4 Qh4 7.g3 Qe7 (7...Qd8 8.Nf3=) 8.Nf3 Bb7 (8...a6 9.a5=) 9.Bg2 Nd7 (9...a6 10.0-0=) 10.0-0+= f6 (10...a6 11.Nc3=) 11.Nc3 d4? (better is 11...Nh6+=) 12.ed4+- Bf3 (12...a5 13.Re1 0-0-0 14.d5+-) 13.Qf3 Rc8 14.d5 e5 15.Rfe1 (15.a5 Rd8+-) 15...Qd6 (15...Rd8 16.a5+-) 16.Bh3 (16.Ne4 Qd5 17.Nf6 Ngf6 18.Qd5 Nd5 19.Bd5 c4+-) 16...Rc7 (16...Rd8+-) 17.Be6 Ne7 (17...Rb7 18.Ne4 Qe7+-) 18.Ne4 (18.Ne4 Qd5 19.Bd5 Nd5 20.fe5 Ne5 21.Nf6 gf6 22.Qd5+-) 1–0. marre – wskb, internet, 2010.

5.e3 d4 6.c4 d3 7.Nf3 Nf6 8.Ne5 (8.Ra3 Nbd7+-) 8...Nbd7 9.Nd3 (9.Bd3? Ne5 10.Be5 Qd3-+) 9...e5 (better 9...Bd6+=) 10.Nf4?? (better 10.Ne5 Ne5 11.Be5+-) 10...ef4-+ 11.ef4 Be7 12.Be2 0-0 13.0-0 Ne4 (13...Re8 14.Re1-+) 14.g3 (14.Qc2 Ndf6-+) 14...Nef6 (14...Bf6 15.Qc2-+) 15.d3 (15.a5 a6 16.b6 Re8-+) 15...b6 (15...Re8 16.Re1-+) 16.Nd2 (16.Bf3 Rb8-/+) 16...Rb8 (16...a6 17.Bf3 Ra7 18.Re1-+) 17.Bf3 Bb7 18.Ne4 (18.Bb7 Rb7 19.Qf3 Rb8-/+) 18...Ne4 19.de4 Bf6 (better 19...Re8!?-/+) 20.e5=+ Be7 (20...Bf3 21.Qf3 Be7 22.Rad1=+) 21.Bb7 (21.Bc6!? Bc8 22.Qd5=) 21...Rb7=+ 22.Qf3 Rb8 23.Rfd1 Qe8 (23...Qc7 24.Qc6 Rb7 25.f5=) 24.Rd2 f5?? (better 24...Qc8=) 25.Rad1 (25.Qd5!? Kh8 26.Qd7 Rd8 27.Qe8 Rfe8+- (27...Rde8?? 28.Rd7+-)) 25...Rd8 (better 25...Nf6 26.ef6 Bf6+-) 26.Qc6 (better 26.Qd5 Kh8 27.Qb7 Ne5 28.Rd8 Bd8 29.Be5+-) 26...Nb8+- 27.Qe6?? (better 27.Rd8 Bd8 28.Qb7+-) 27...Kh8 (27...Qf7!? 28.Qf7 Kf7-/+) 28.Rd8= (28.Rd8 Bd8 29.Qc8=) 1–0. BeepBeepImAJeep (2385) – nazaki1234 (2140), lichess.org, 2015.

5.e3 Nd7 6.c4 Ngf6 7.Nf3 Be7 8.Be2 0-0 9.0-0 b6 10.d4 cd4 (10...Bb7 11.Nbd2=) 11.Nd4+= dc4? (better 11...Qc7+=) 12.Bf3+- (12.Bc4?! Bb7=) 12...Nd5 13.Nc6 (better 13.Ne6!? fe6 14.Bd5 ed5 15.Qd5 Rf7 16.Qa8+-) 13...Qe8+- 14.Bd5 ed5 15.Qd5 Bb7?? (better 15...Bf6 16.Bf6 Nf6 17.Qc4 Bd7+-) 16.Ne7+- Qe7 17.Qb7 Rfb8 (17...Qe6 18.Bd4+-) 18.Qf3 (18.Qd5 Rd8 19.Qc4 Rac8+-) 18...Re8 (18...a6 19.Rc1+-) 19.Nd2 (19.Rc1 Rac8+-) 19...Rac8 (19...Qb4 20.Ba3 Qa4 21.Qd5+-) 20.Rac1 Qe6 21.Qg3 f6 22.Bd4 Kh8 (22...Ne5 23.Rc3+-) 23.Rc2 Ne5 24.Rfc1 (better 24.Be5!? fe5 25.Rfc1 Red8+-) 24...Nd3 25.Rd1 (better 25.Ra1+-) 25...Nb4 26.Rc3 Nd5?? (better 26...Na2+-) 27.Rcc1 (better 27.Rc4 Rc4 28.Nc4 Nf4 29.Qf4 Qc4+-) 27...c3 28.Nf3 c2 29.Re1 (better 29.Rd2 Nb4 30.Bb2+-) 29...Nb4+- 30.Ba1 (better 30.a5!?+-) 30...Nd3+= 31.Nd4 Qe4 (31...Qe7 32.Nf5 Qd7-+) 32.Qf3?? (32.Rf1 Nc1 33.Rc1 Qd3=) 32...Qf3 (better 32...Ne1 33.Qe4 Re4-+) 33.Nf3+= (worse 33.gf3 Ne1 34.Nc6 Nf3 35.Kg2 Nh4 36.Kh3 Re4-+) 33...Ne1 (33...Rc4 34.Kf1 Ra4 35.Ke2 Nc1 36.Rc1+=) 34.Ne1+- Red8 (34...Rc4 35.a5 (35.Rc2? Rc2 36.Nc2 Rc8-+; 35.Nc2? Rec8-+) 35...ba5 36.Kf1+- (36.Rc2? Rc2 37.Nc2 Rc8-+; 36.Nc2? Rec8-+)) 35.Bd4 (35.Nc2? Rc2 36.Rf1 Rc4-+; 35.Rc2?? Rc2 36.Bd4 Ra2-+) 35...Rd7? (better 35...Rc4!?+-) 36.Kf1+- (36.Nc2 Rdc7-/+) 36...Rdc7 37.Ke2 Rc4 38.Kd2 (38.a5 Rb4 39.ab6 ab6 40.Bb6 Rb5+-) 38...Kg8? (better 38...Ra4 39.Nc2 a6+-) 39.Rc2 Rc2 40.Nc2 1–0. BeepBeepImAJeep (2540) – truwa (2020), lichess.org, 2017.

5.e3 Ne7 6.c4 f5 7.Nf3 Qc7 8.d4 b6 9.Bd3 Bb7 10.0-0 Nd7 11.Nbd2 Nf6 12.Qc2 0-0-0 13.Rac1 dc4 14.Bc4 Bf3 15.Nf3 Ned5 16.Bd5 Rd5 17.Ng5 Kd7 18.Rfd1 h6 19.Nf7 Rh7 20.Ne5 Kd6?? (better is 20...Ke8!?+/–) 21.Ba3 (better is 21.Ng6 Be7 22.dc5 Kd7 23.Bf6 gf6 24.Nf4+-) 21...Qc8?? (21...Ke7 22.Ng6 Kf7 23.Nf8 Kf8 24.dc5 Rd1 25.Qd1 Kf7 26.cb6 Qb6+-) 22.dc5 bc5 23.Bc5 Qc5 24.Qc5 Ke5 25.Qc3 Ke4 26.f3 1–0. Bonetti,Shane – Kibitz, 2000.

5.e3 f6 6.c4 Bd6 7.Nf3 Ne7 8.Be2 0-0 9.d4 dc4 (9...cd4 10.ed4 dc4 11.0-0=) 10.Bc4+= cd4 (10...a6 11.Qb3+=) 11.Nd4 Nd5 12.0-0 (12.Nc3 Be5+=) 12...Kh8 (better 12...Bh2!? 13.Kh2 Qc7 14.Kg1 Qc4=+) 13.Kh1 (13.Bd5 ed5 14.Ba3 Ba3 15.Ra3 Re8+-) 13...e5 (13...Nc7!?+=) 14.Bd5+- ed4 15.Qd4?? (15.e4 a6+-) 15...Bc7?? (better 15...Be5 16.Qe4 Bb2 17.Bb7 f5-+) 16.Bf3 Qd4 (16...Nd7 17.Rd1+-) 17.Bd4 Be6? (better 17...Nd7+-) 18.Nd2 (better 18.Rc1!? Ba5 19.Bb7 Nd7 20.Ba8 Ra8+-) 18...Nd7 19.Bb7 (19.a5 Rad8 20.Bb7 Bb8+-) 19...Rab8 20.Bc6 Bb6 21.Nf3 Bd4 (21...Kg8+-) 22.Nd4 (22.ed4?! Rfd8+-) 22...Ne5 (22...Bc4 23.Bd7 Bf1 24.Rf1+-) 23.Ne6 Nc6 (23...Rf7 24.Rfd1+-) 24.Nf8 Rf8 (24...Ne5 25.Ne6 Kg8 26.Rfd1+-) 25.bc6 Rc8 26.Rab1 Kg8 27.Rfc1 Kf8 28.c7 (better 28.Rb7 h5+-) 28...Ke7 29.Rb8 (29.Rb5 a6+-) 29...Kd7 30.Rc8 Kc8 31.e4 (better 31.f4 f5 32.g4+-) 31...g6 (31...g5+-) 32.f4 h5 (32...h6 33.e5 fe5 34.fe5 h5 35.e6 g5 36.e7 Kd7 37.c8Q Ke7 38.Rc6 h4 39.Qb7 Ke8 40.Rc8) 33.e5 fe5 34.fe5 a5 (34...g5 35.e6 a6 36.e7 Kd7 37.c8Q Ke7 38.Rc6 h4 39.Qb7 Ke8 40.Rc8) 35.e6 g5 (35...h4 36.e7 h3 37.e8Q Kb7 38.c8Q Kb6 39.Qe3) 36.e7 Kd7 37.e8Q! Ke8 (37...Ke8 38.c8Q Mate attack) 38.c8Q Kf7 (38...Ke7 39.Rc6 h4 40.Qb7 Ke8 41.Rc8) 39.Rc6 g4 (39...h4 40.Qd7 Kf8 41.Rc8) 40.Re6 (40.Qd7 Kf8 41.Rc8) 40...g3 (40...h4 41.Qd7 Kf8 42.Re8) 41.Qe8 (41.Qd7 Kf8 42.Re8) 41...Kg7 42.Rg6 Kh7 43.Qg8 1–0. BeepBeepImAJeep (2755) – mengene80 (2070), lichess.org, 2015.

5.e3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 c5).

(--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 TESTI750 4.a4 d5).

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

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

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

4.e3 a6 5.a4 Nf6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 c6).

4.e3 f6 5.c4 e5 6.a4 cb5 7.cb5 Be6 8.Nf3 Bd6 9.Be2 Ne7 10.0-0 b6 11.Nc3 Nd7 12.Rc1 0-0 13.d4 e4 14.Nd2 f5 15.f3 Qc7 (15...Qb8 16.h3=) 16.f4 Qd8 17.Qb3 Qc7?? (better is 17...Rc8=) 18.Nce4+- Qd8 (18...fe4 19.Rc7 Bc7+-) 19.Nd6 1–0. Van Esbroeck,Dirk – Neil,Charlie, SN–2010-0-00295, 2010.

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

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

5.a4 a6 6.ba6 Na6 7.c4 Nf6 8.Nf3 Be7 9.Be2 0-0 10.0-0 Ne4 11.Nc3 (11.d3 Nf6=) 11...Nc3 12.Bc3 Bf6 (12...Nc5 13.Qc2=) 13.Bf6+= Qf6 14.d4 Nc7 (14...dc4 15.Bc4 c5 16.Ba6 Ra6 17.dc5+=) 15.c5 Qe7 16.Bd3 f6 (16...Bc8!?+/–) 17.Qb1+- Rab8 18.Bh7 Kh8 19.Nh4 Be8 20.Bg6 (20.Bd3 g5 21.Nf3 Bh5+-) 20...f5 21.g3 Rf6 22.Be8 Ne8 23.f4 (23.Nf3 Kh7+-) 23...Rh6 24.Nf3 g6 (24...Nf6 25.Qb6+-) 25.Rf2 Qh7? (25...Ra8 26.Qb3+-) 26.h4 (better is 26.Rb2+-) 26...Nf6 27.Ng5 Qe7 28.Kg2 (28.Qb6 Ne4 29.Rb2 Ng5 30.fg5 Rh7 31.Qc6 Ra8+- (31...bc6?? 32.Rb8 Kg7 33.Rab1+-)) 28...Kg7 (28...Ng4 29.Re2+-) 29.Qb3 (29.Rb2 Ng4 30.Ra3 Rhh8+-) 29...Rhh8 30.a5 Rhe8 31.Qd3 White prepares the advance a6 (31.Rb2 Nd7+-) 31...Ra8+/– 32.a6 Qc7 (32...ba6!? 33.Ra6 Ng4+/–) 33.Rb2 Ng4? (33...Ra7+-) 34.Rab1 (better is 34.Qb1 Kg8 35.Rb7+-) 34...Kf6 (34...Kg8 35.Rb7 Qa5+-) 35.Rb7 Qb7 (35...Re7 36.Rc7 Rc7+-) 36.Rb7 Rf8 37.Nh7 1–0. Labahn,Wolfgang – Peist,J, Jugend–BEMS, 1980.

5.a4 a6 6.Nc3 ab5 7.ab5 Ra1 8.Qa1 Bd6? (8...Nf6!?=) 9.bc6 (9.Ne4 de4 10.Bg7 Bh2 11.Bh8 Bg1 12.Rg1 cb5 13.Qg7+-) 9...bc6? (9...Bc6 10.Nd5 f6 11.Nf4+/–) 10.Nd5! cd5? (10...cd5 11.Bg7; 10...ed5 11.Bg7) 11.Bg7+- f6 (11...Qc7 12.Bd3 e5 13.Bh8+-) 12.Bh8 Kf7 13.Bd3 (better is 13.Be2 e5 14.Bh5 Ke7+-) 13...Nh6 14.Bh7 (better is 14.Qf6!? Qf6 15.Bf6 Kf6 16.Bh7+-) 14...Qh8+/– 15.Bd3 Qg7 16.g3 Nc6 17.Nf3 (17.Bb5 Ke7+/–) 17...e5 18.Bb5 Qg4 19.Nh4 (19.Be2 Nb4 20.Ne5 Be5 21.Bg4 Nc2 (21...Ba1? 22.Bd7 Nc2 23.Ke2+-) 22.Kd1 A) 22...Ba1? 23.Bd7 (23.Kc2?! Ba4 24.Kb1 Ng4 25.Ka1 Nf2+=) 23...Na3 24.Bc6+-; B) 22...Ne3 23.de3 Bg4 (23...Ba1 24.Bd7 Ke7 25.Bb5+-) 24.Kd2 Ba1 25.Ra1 Bh3+/–) 19...Qe4 (19...Nb4!? 20.Qa7 Nc2 21.Kf1 Ke7=) 20.0-0+/– Bh3?? (20...Ke7 21.f3 Qb4 22.Qa4+/–) 21.f3?? (21.d3 Qg4 22.Bc6 Bf1 23.Qa7 Kg8 24.Bd5 Kf8 25.Kf1 Be7+-) 21...Qb4? 22.Bc6+- Qd2 (22...Qc4 23.Bb7 Bf1 24.Qf1+-) 23.Rf2 (23.Qc1 Bb4 24.Qd2 Bd2 25.Bd5 Ke7+-) 23...Qe3 24.Bd5 Ke7 (24...Kg7 25.Ng2 Bg2 26.Kg2+-) 25.Ng2 (better is 25.Ng6!? Kd8 26.Qa8 Bc8+-) 25...Qc5 (25...Qb6 26.Qa2+-) 26.Qa8 (26.c4 Nf5 27.f4 Bg2 28.Bg2 ef4 29.Qe1 Kd8 30.gf4 Bf4+-) 26...Nf5? (26...Qb6 27.Qc6 Qc6 28.Bc6+-) 27.Qb7 (27.Qg8!? Bg2 28.Bf7 Qc6+-) 27...Bc7 28.Qc6 (28.Ne1 Qc3 29.Re2 Nd4+-) 28...Qc6 29.Bc6 Bb6 30.Be4 Bf2 31.Kf2 Nd4 32.Ne3 f5 33.Bd3 1–0. Fredek (2090) – Nwab, Freundschaftspartie, 5m + 0s, 2005.

5.a4 a6 6.c4 Nf6 7.Nf3 ab5 8.cb5 Bb4 9.Ne5 0-0 10.Nd7 Nbd7 (10...Qd7? 11.Bf6 Be7 12.Bc3+-; 10...Nfd7? 11.Qg4 Bd2 12.Nd2+-) 11.Be2 c5 12.0-0 Ba5 13.Bf3 c4 14.d3 Nc5 (better 14...cd3!? 15.Qd3 Nc5=+) 15.dc4+= dc4 16.Qd8 (16.Qc2 Qd3 17.Rc1 Nb3+=) 16...Rad8 (16...Rfd8 17.Bf6 gf6 18.Ra2=) 17.Bf6 gf6 18.Na3 Nb3 (18...c3 19.Nc4 Ra8 20.Rac1+=) 19.Ra2 (19.Nc4 Na1 20.Na5 Ra8 21.Ra1 Ra5 22.Bb7 Rd8+-) 19...Rd3 (better 19...Nd2!? 20.Rd2 Bd2 21.Nc4 Rd7+=) 20.Nc4+- Bb4? (better 20...Rc8 21.Be2 Rdd8+-) 21.Bb7 Rfd8 (21...Rc3 22.Nd2 Nd2 23.Rd2+-) 22.g3 White prepares the advance a5 22...Nc5 23.Bc6 Rc3 24.Nb6 (better 24.Nd2!? Ba5+-) 24...Ba5 25.Rb1 (25.Na8 Rc4+-) 25...Bb6 26.a5 Ba7 27.b6 Bb8 28.a6?? White plans b7 (better 28.Bf3+-) 28...Na6-/+ 29.Ra6 Rc6 30.Ra4 Kg7 31.b7 h5 32.Kg2 Rc5 33.Kh3? (33.h3 Kf8-/+) 33...Kf8 (better 33...Rc2!?-+) 34.Ra8 Ke7 35.Kh4? (35.Ra2 Kd7-/+) 35...Rc4 (35...Rc2!? 36.h3-+) 36.f4 (36.Kh3-/+) 36...Rc5 (36...Rc2 37.h3-/+) 37.e4-/+ Kd6?? (better 37...e5-/+) 38.Rd1+- Kc7 (38...Rd5 39.ed5 Kc7 40.Rc1 Kb7 41.Ra3 ed5 42.Rb3 Ka8 43.Kh5+-) 39.Rd8 Kd8 40.Rb8 Kc7 (40...Kd7+-) 41.Rf8 (better 41.Rc8 Kb7 42.Rc5+-) 41...Kb7 42.Rf7 Kc6 43.Rf6 Kd6 (43...Kd7 44.Rh6+-) 44.Rh6 (better 44.f5!? Kd7 45.Re6 Rc2+-) 44...Rc2 45.h3 (worse 45.Rh5 Rh2 46.Kg5 Rb2+-) 45...Ke7 46.Rh5 Kf7 47.Re5 Rc8 48.Rg5 (48.g4 Rh8 49.Kg3 Rd8+-) 48...Rh8 49.Kg4 Kf6 50.e5 Kf7 51.h4 Rh6 52.h5 Rh7 53.Kf3 Rh8 54.Ke4 Rd8 55.g4 Rb8 56.Kf3 Rb3 57.Ke4 Rb4?? (57...Rb8 58.h6 Rb4 59.Ke3 Rb3 60.Kd4 Rb1+-) 58.Kd3 (58.Ke3 Rb3 59.Kd2 Rb4+-) 58...Rb3 (58...Rf4 59.h6 Rf3 60.Kc4+-) 59.Kc4 Rf3 (59...Rh3 60.f5 ef5 61.gf5+-) 60.h6 Rh3 (60...Rf4 61.Kc5 Rf2 62.Rg7 Kf8+-) 61.Rh5 (61.Rh5 Ra3 62.h7+-) 1–0. KLINGON09 (1805) – CakraMr911 (1765), lichess.org, 2019.

5.a4 a6 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 cb5 9.Ne5 b4 10.Qh5 Nh6 11.Bd3 Qa5 12.Bd4 Bb5 13.0-0 Bd3 14.Nd3 Nc6 15.Bb2 Nf5 16.Rc1 Qa4 17.h3 Be7 18.Qg4 Qa6 19.Nf4 (19.e4 de4 20.Qe4 0-0-/+) 19...Qa2-/+ 20.Nd3 0-0 21.Qd1 Ra8 22.Qf1 Bd6 23.g4 Nh4 24.f4 Be7 (24...Qc4 25.Qf2 b3 26.Ne1-/+) 25.Qf2 (25.f5 d4! 26.e4 Qc4-/+) 25...h6 (better 25...b3!? 26.Nc3 Qa6-+) 26.f5=+ ef5 27.gf5 Bg5 28.f6 g6 29.Qg3 (29.Kh2 d4! 30.Bd4 Qd5-+) 29...d4! 30.Bd4 (30.Bd4 Nf5 Double attack (30...Nf5 Decoy); 30.ed4 Nf5 Double attack (30...Bf6 Decoy; 30...Bf6 Interception)) 30...Nd4 31.ed4 Qd5 32.Rf1 Qd4 33.Kh2 (33.Qf2 Qd6 34.Qh2 Qc6-+) 33...Re8 34.Rf2 (34.Kh1 Bf6 35.Nf4 Qe4 36.Kh2 Qc2-+) 34...Nf5 35.Qg4 Qd6 36.Kg1 b3 (36...Qf6?! 37.Qb4 Qc6 38.Nc3-+) 37.Qa4 Qg3 38.Kf1 Qh3 39.Kg1 b5 40.Qb3 (40.Qb5 Re4 41.Rg2 bc2 42.Qb8 Kh7 43.Qb2 Nh4 44.Rg4 Qg4 45.Kh2 Qg2) 40…Re4 (40...Re4 41.Qb4 Rb4 42.Nb4 Ng3 43.Rf5 Ne2 44.Kf2 Qh2 45.Ke1 Ng3 46.Rf2 Qg1 47.Rf1 Qf1) 0-1. onur604 (2320) - Big_Pencil (2205), Casual Rapid game, lichess.org, 2021.

5.a4 c5 6.c4 dc4 (6...Nf6 7.Nf3+-) 7.Bc4 b6?? (better 7...Nf6+-) 8.Qf3+- (8.Qf3 Na6 9.ba6+-) 1–0. DEFFM – GuestHBZD, freechess.org, 2019.

5.a4 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd7).

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

6.ab5 a6 7.Nf3 Nf6 8.Be2 (8.Bd4 Bd6+-) 8...Bd6+= 9.Ne5 (9.Nc3 0-0+=) 9...Be5 (better 9...0-0!?+=) 10.Be5+- 0-0 (10...Bc8 11.ba6 ba6 12.Nc3+-) 11.0-0 Ne4 (11...Be8!? 12.f3+-) 12.d3 (12.f3 Nf6+-) 12...Nf6 13.c4 Ne8 (13...Qe7 14.Nc3+-) 14.Qb3 f6 15.Bb2 dc4 16.dc4 Nd6 (16...Bc8 17.Nc3 Nd7 18.Ba3+-) 17.Nc3 Qe7 (17...Qc7 18.Rfd1 Nf7+-) 18.Ba3 Rc8 (18...ab5 19.Bd6 Qd6 20.Ra8+-) 19.Ne4!! 1–0. GuestJWKK – GuestTSYW, freechess.org, 2020.

6.ab5 Qb6 7.Nc3 Nf6= 8.Bd3 Bc5 (better is 8...e5!?=) 9.Na4+/– Qc7 10.c4 (better is 10.Nc5!? Qc5 11.Qf3+/–) 10...dc4= 11.Bc4 0-0 (better is 11...Bb4!? 12.Rc1 Qd8=) 12.Bf6+/– gf6 13.Qg4 (13.Bd3!? Rc8 14.Rc1+/–) 13...Kh8+= 14.Qh4 f5 15.Qf6 (15.Nf3!? Rg8 16.Nc5 Qc5 17.Qf6 Rg7 18.Ne5+/–) 15...Kg8+= 16.Nf3 Be7?? (better is 16...Bb4+=) 17.Qe7+- Qc4 18.Qg5 Kh8 19.Qh6 Qc8 (19...Qg4 20.Qf8 Qg8 21.Qg8 Kg8+-) 20.Ng5 Bb5 (20...Qc1 21.Rc1 Bb5 22.Qf8) 21.Qh7 1–0. Andy HB – Tricky Rabbitt, ChessWorld.net, 2005.

6.ab5 Qb6 7.Bd4 Bc5?? 8.Bg7 Bb5 9.Bb5 Qb5 10.Bh8 Nd7 11.Nc3 Qc4 (11...Qc6 12.Nf3+-) 12.Nge2 (12.Ra4 Bb4+-) 12...0-0-0 (12...a5 13.Bd4+-) 13.Ra4 Bb4 14.Ra7 Qg4 (14...Ngf6 15.Bf6 Nf6 16.0-0+-) 15.Ra8 (better 15.Qb1 Ne7 16.Ra8 Nb8 17.h3+-) 15...Kc7 (15...Nb8 16.Qb1 Kd7+-) 16.Nb5 Kb6 17.Rd8 Qg2 18.Rg1 Qh2 19.Rd7 Kb5 20.Rb7 Kc6 21.Rb4 Nh6 22.Qa1 Nf5 (22...Qc7 23.Be5 Kd7 24.Bc7 Ng4 25.Qa7 e5 26.Be5 Ke6 27.Nd4 Ke5 28.Qe7) 23.Qc3 Kd6 24.Rb6 Ke7 (24...Kd7 25.Rb7 Qc7 26.Qc7 Ke8 27.Rg8) 25.Bf6 Kf8 (25...Ke8 26.Qc8) 26.Qc8 1–0. DEFFM – GuesFLHB, freechess.org, 2018.

6.ab5 Qb6 7.Bd4 Qc7 8.b6 Qc8? (8...ab6 9.Ra8) 9.Ra7?? (9.ba7 Nc6 10.Bb6 Nf6+-) 9...Ra7? (better is 9...Nc6 10.Ra8 Qa8+=) 10.ba7+- Na6 (10...Nc6 11.Nc3 Nd4 12.ed4+-) 11.Nc3 (better is 11.Nf3 Nf6 12.Ne5+-) 11...Bc5?? (11...Nf6+-) 12.Bg7 Ba7 13.Bh8 f6 (13...Nb4 14.Qg4 Nc2 15.Kd1+-) 14.Qh5 Ke7 15.Qh7 Kd6 16.Nf3 (16.Bb5 Nb4 17.Bd7 Qd7 18.Qg8 Nc2 19.Kd1 d4 20.ed4 Nd4 21.Bf6 Nc6 22.Nb5 Kc5 23.Na7 Na7 24.Qg5 Kc4+-) 16...Nb4 17.Bb5 Nc2 18.Qc2 Bb5 19.Nb5 Kd7 20.Qc8 Kc8 21.Na7 Kc7 22.Ke2 Kb6 23.Ra1 (better is 23.Nc8 Kc7 24.Rc1 Kd7+-) 23...e5 24.Bg7 e4 25.Nd4 Ne7 26.Bf6 Nc6 27.Ndc6 bc6 28.Bd4 Kc7 29.Bc5 Kb7 30.h4 Kc7 31.h5 (31.h5 Kd7 32.h6 d4 33.Bd4 c5 34.Bc5 Ke6 35.h7 Kf5 36.Ra6 Kg5 37.Be7 Kg4 38.h8Q Kf5 39.Qh5) 1–0. Fredek (2090) – Torcoz, Freundschaftspartie, 5m + 0s, 2005.

6.ab5 Qb6 7.Bd4 Qd8+/–.

6.ab5 Qb6 7.Qg4 Bb5 (7...Nh6 8.Qd4 Qd4 9.Bd4=) 8.Bb5 (8.Bg7?! h5 9.Qg3 h4+-) 8...Qb5 9.Bg7 Bg7?? (better 9...h5 10.Qg5 Be7=) 10.Qg7+- Nc6 (10...Ke7 11.Nc3 Qe8 12.Qh8+-) 11.Qh8 Ke7 12.Qc3 (12.Nc3 Qc4+-) 12...a6 (12...Qb4 13.Nf3+-) 13.Ne2 (13.Na3 Qa5 14.Qb2 Rb8+-) 13...Kd7 (13...Qb4 14.Qh8+-) 14.Na3 (14.Qg7 Qc5 15.Nbc3 Qe7+-) 14...Qb6 15.0-0 Rc8 (15...Qd8 16.Qg7+-) 16.Rfb1 Qa7 (16...Qc7 17.Qg7 Ke7 18.Qh7+-) 17.Qb3 (17.Qg7 Ke7+-) 17...b5 18.Nb5! ab5 (18...Qb6 19.Nbd4 Qb3 20.Rb3 Nd4 21.Nd4+-) 19.Ra7 (19.Ra7 Na7 20.Nd4+-) 1-0. Yuris___ (1615) – stonecollector, Rated Classical game, lichess.org, 2013.

6.Nc3 a5 A) 7.Bd3 Nf6 (7...e5 8.bc6 bc6 9.Rb1 Nf6 10.Nf3 Bd6 11.0-0 Na6 12.Nh4 0-0) 8.f4 c5 9.Nf3 c4 10.Be2 Bc5 11.Ba3 Ba3 12.Ra3 0-0; B) 7.Be2 Nf6 (7...Be7 8.Nf3 Nf6 9.0-0 0-0 10.h3 Be8 11.Re1 c5 12.Ba3 Nbd7; 7...cb5 8.Nb5 Nf6 9.Nf3 Bc5 10.Rb1 Bb5 11.Bb5 Nc6 12.Ne5 Qc7; 7...Nh6 8.Nf3 Be7 9.0-0 0-0 10.Bd3 f6 11.e4 Bd6 12.h3 Nf7; 7...Ne7 8.Nf3 Nf5 9.Bd3 Be7 10.0-0 0-0 11.Qe2 Bf6 12.Rfb1 Qc7) 8.Nf3 Bd6 9.0-0 0-0 10.Ba3 cb5 11.ab5 Ba3 12.Ra3 Bc8; C) 7.Rb1 Nf6 (7...h6 8.Nf3 Nf6 9.Ne5 Bc8 10.bc6 bc6 11.Bd3 Nbd7 12.Nd7 Bd7; 7...c5 8.Nh3 Nf6 9.Bd3 e5 10.e4 c4 11.Be2 Bh3 12.gh3 de4; 7...Qc7 8.f4 Nf6 9.Nf3 Bc5 10.Bd3 0-0 11.Ne5 Bc8 12.0-0 Nbd7) 8.Nf3 h6 9.Bd3 c5 10.0-0 c4 11.Be2 Bd6 12.Na2 0-0; D) 7.Ra2 Nf6 (7...cb5 8.ab5 Nf6 9.Nf3 Bd6 10.Bd3 0-0 11.Na4 Qd8 12.Bd4 Bc8; 7...h6 8.Bd3 Nf6 9.Nf3 Bd6 10.Ba3 cb5 11.ab5 0-0 12.Na4 Qc7) 8.Nf3 Bd6 9.Be2 0-0 10.0-0 Be8 11.Ba3 c5 12.d4 Nbd7; E) 7.Nf3 Nf6 8.Bd3 Bd6 9.0-0 0-0 10.bc6 Nc6 11.Nb5 Bc5 12.Qe2 Nb4.

6.Nc3 a6 7.Nf3 (7.Bd3 Nf6 8.Nf3 Bd6 9.0-0 0-0 10.Ne2 c5 11.Nf4 d4 12.c4 ab5; 7.a5 Qd8 8.b6 Nf6 9.Nge2 c5 10.g3 Nc6 11.Bg2 Bd6 12.0-0 0-0) 7...Nf6 8.Bd3 Bd6 9.a5 Qd8 10.Na4 ab5 11.Nb6 Ra6 12.0-0 0-0.

6.Nc3 cb5 7.Nb5 (7.ab5 Nf6 (7...a6 8.Nge2 Bb5 9.Nb5 Qb5 10.Be5 Qd7 11.Nd4 Nf6 12.Nb5 Nc6; 7...Qc7 8.Nf3 Nf6 9.Bd3 Bc5 10.0-0 0-0 11.Qe2 Be8 12.Na4 Nbd7; 7...Bc8 8.Na4 Qd8 9.c4 Nf6 10.Nf3 Nbd7 11.Rc1 dc4 12.Bc4 Nb6) 8.Nh3 Qc7 9.Qf3 Bc8 10.Qg3 Qg3 11.hg3 Nbd7 12.b6 Bc5) 7...f6 (7...Nc6 8.a5 Qd8 9.Nf3 Nf6 10.Bd3 Nb4 11.Be2 Be7 12.Bf6 gf6; 7...Bb5 8.Bb5 Nc6 9.Nf3 Nf6 10.c4 dc4 11.Ne5 Bc5 12.Nc4 Qd8) 8.Nf3 (8.Bd3 g6 9.a5 Qd8 10.Nf3 a6 11.Nc3 Nc6 12.e4 Nge7) 8...a6 9.Nfd4?? (better is 9.a5 Qc6 (9...Qd8 10.Nbd4 Nc6 11.Nh4 Nh6 12.c4 Nd4) 10.Nfd4= Qc8 11.Nc3 Nc6 12.Bd3 Nd4) 9...ab5-+ 10.ab5 Ra1 11.Qa1 Bc5 12.c4 Ne7 13.Be2 (13.Qa4 Qc7-+) 13...0-0 (better is 13...e5!? 14.Nb3 dc4 15.Bc4 Bb5 16.Bb5 Qb5 17.Nc5 Qc5 18.0-0-+) 14.0-0 e5 (14...Bb4!? 15.Ba3 Bd6 16.Rc1-+) 15.Nb3-/+ dc4 16.Bc4 Kh8 17.Nc5 Qc5 18.Qa4 (18.d3!? Qc8 19.Ba3-/+) 18...Rc8-+ 19.Be2 (19.Rc1 Qd6 20.d4 ed4 21.Bd4 Be6-+) 19...Nd5 (19...Qc2 20.Qc2 Rc2 21.Bc3-+) 20.Ba3 (20.Rc1 Qd6-+) 20...Qb6 21.Rb1 g6 22.Qb3 Be6 23.Qb2 Nd7 24.h3 Kg7 25.g4 (25.Rc1 Rc1 26.Qc1 h6-+) 25...Ra8 26.Rc1 Nf8 (26...Ra5 27.Bc4-+) 27.Bc5 Qa5 28.Bd6 Qa2 29.Rc2 Qb2 30.Rb2 Nd7 31.Kg2 Kf7 32.Kg3 N5b6 33.Bf3?? (33.d3 Bd5-+) 33...Bd5 (better is 33...Nc4 34.Be5 Nde5-+ (worse is 34...Nce5 35.Bb7 Rb8 36.Be4-+)) 34.Be2 Nc4 35.Rc2 (35.Bc4 Bc4 36.d4-+) 35...Nd6 36.Rc7 Ke8 37.Rc2 Rc8 (37...Ne4 38.Kg2 Nc3 39.Bf3 Bf3 40.Kf3 Nb5 41.d3-+) 38.Rb2 (38.Rc8 Nc8 39.f4 Nd6-+) 38...Nb6 (38...Ne4!? 39.Kg2 Nd2 40.f3-+) 39.f3 Bc4 (39...Bc4 40.Kf2 Be2 41.Ke2 Nd5-+) 0–1. Van Esbroeck,Dirk – Pehl,Ferenc, IECG, 2010.

6.Nc3 Nf6 A) 7.Be2 a6 (7...Bd6 8.Nf3 0-0 9.0-0 a6 10.g3 e5 11.Re1 Qc7 12.Qc1 h6) 8.Nf3 Bd6 9.0-0 0-0 10.Qb1 ab5 11.ab5 Ra1 12.Ba1 Qa5; B) 7.Nf3 Bd6 (7...cb5 8.ab5 Bd6 9.Na4 Qc7 10.Rc1 0-0 11.c4 Qa5 12.c5 Be7; 7...Bc5 8.Bd3 0-0 9.0-0 Qc7 10.Ne2 Bd6 11.Bf6 gf6 12.Ng3 f5; 7...Qc7 8.Bd3 e5 9.Be2 Bd6 10.0-0 0-0 11.bc6 Bc6 12.Nb5 Bb5; 7...a6 8.Bd3 Bd6 9.0-0 0-0 10.a5 Qd8 11.Na4 ab5 12.Nb6 Ra6; 7...a5 8.Bd3 Bd6 9.Ba3 c5 10.e4 de4 11.Ne4 Ne4 12.Be4 0-0) 8.Bd3 0-0 9.0-0 cb5 10.Nb5 Bb5 11.ab5 Nbd7 12.Qb1 Rfc8.

6.Bd4 A) 6...Qc7 A1) 7.f4 Nh6 (7...f6 8.Bd3 c5 9.Bb2 Nh6 10.c4 d4 11.ed4 cd4 12.Ne2 Bc5; 7...Nf6 8.Nc3 c5 9.Be5 Bd6 10.Nf3 Be5 11.Ne5 d4 12.Ne2 de3; 7...Ne7 8.Bd3 Nf5 9.Bf5 ef5 10.Nc3 Bd6 11.Bg7 Rg8 12.Bd4 Rg2; 7...Qd8 8.Nf3 a6 9.Be2 ab5 10.ab5 Ra1 11.Ba1 cb5 12.Nc3 b4; 7...a6 8.Nc3 Qa5 9.Nf3 c5 10.Be5 f6 11.Bb8 Rb8 12.Rb1 Bd6) 8.Bd3 c5 9.Be5 Qb6 10.Nf3 f6 11.a5 Qd8 12.Bc3 a6; A2) 7.Nf3 Nf6 (7...f6 8.c4 Ne7 9.cd5 cd5 10.Bb2 Ng6 11.Nc3 Bd6 12.Bd3 0-0) 8.Nc3 Bd6 9.Bf6 gf6 10.Bd3 Rg8 11.g3 f5 12.0-0 c5; B) 6...Qa5 B1) 7.Bd3 c5 8.Bc3 Qc7 9.Nf3 Nf6 10.g3 c4 11.Be2 a6 12.Bf6 gf6; B2) 7.Be2 Nf6 (7...Nh6 8.Bc3 Qd8 9.Nf3 a6 10.Bb2 ab5 11.ab5 Ra1 12.Ba1 cb5; 7...f6 8.Bd3 Bb4 9.Qg4 Kf8 10.Qf4 c5 11.Qd6 Kf7 12.c3 cd4; 7...c5 8.Be5 f6 9.Bc3 Qc7 10.Nf3 Bd6 11.Bb2 Ne7 12.c4 0-0; 7...Ne7 8.Bc3 Qc7 9.Nf3 Nf5 10.Na3 f6 11.0-0 Bc5 12.bc6 Nc6; 7...Qc7 8.f4 Nf6 9.Nf3 c5 10.Be5 Bd6 11.0-0 Be5 12.Ne5 Bc8) 8.Nf3 Bd6 9.Nc3 Qc7 10.a5 cb5 11.Nb5 Bb5 12.Bb5 Kf8; B3) 7.Nf3 Nf6 (7...Nh6 8.Bd3 Nf5 9.Bf5 ef5 10.0-0 a6 11.h3 h5 12.Re1 h4) 8.c4 Bd6 9.Nc3 a6 10.c5 Be7 11.Bd3 0-0 12.0-0 Bc8; C) 6...c5 7.Be5 f6 (7...Ne7 8.Qh5 Nf5 9.Nc3 Bd6 10.Nf3 0-0 11.Bd6 Nd6 12.Bd3 g6; 7...Bc8 8.Nf3 Nd7 9.a5 Qd8 10.Bf4 Ngf6 11.h4 Be7 12.h5 h6; 7...Nf6 8.a5 Qd8 9.Nf3 Be7 10.c4 0-0 11.Nc3 a6 12.Be2 ab5; 7...a6 8.Nc3 f6 9.Bg3 Ne7 10.Nf3 Kf7 11.Nh4 ab5 12.ab5 Ra1) 8.a5 Qd8 9.Bg3 Ne7 10.Nc3 a6 11.Nh3 Kf7 12.Na4 Nc8.

6.Nf3 a6 A) 7.Bd3 Nf6 (7...ab5 8.ab5 Ra1 9.Ba1 cb5 10.Bd4 Qa5 11.Nc3 b4 12.Ne2 Nc6) 8.Nc3 Bd6 9.0-0 0-0 10.e4 de4 11.Ne4 Ne4 12.Be4 f5; B) 7.a5 Qd8 8.b6 c5 9.Be5 Nc6 10.Bc7 Qf6 11.Nc3 Nh6 12.Rg1 Nf5; C) 7.Be2 ab5 (7...Nf6 8.Bd4 c5 9.Bf6 gf6 10.Nc3 Rg8 11.0-0 Bd6 12.g3 Qa5) 8.Bd4 c5 9.ab5 Ra1 10.Ba1 Bb5 11.0-0 Be2 12.Qe2 Qa6; D) 7.Nc3 Nf6 (7...ab5 8.ab5 Ra1 9.Qa1 Nf6 10.Qa8 Qc7 11.b6 Qc8 12.Be2 Bd6; 7...cb5 8.ab5 Nf6 9.Bd3 Bd6 10.0-0 0-0 11.h3 h6 12.Qe2 Rc8; 7...Qc7 8.Bd3 Nf6 9.0-0 Bd6 10.g3 e5 11.e4 d4 12.bc6 Nc6) 8.h4 Bd6 9.Bd3 0-0 10.0-0 e5 11.a5 Qd8 12.bc6 Nc6.

6.Nf3 Nf6 A) 7.Bd3 Bd6 (7...a6 8.Na3 cb5 9.ab5 ab5 10.Bf6 gf6 11.Nb5 Ra5 12.Nc3 Nc6; 7...Bb4 8.0-0 0-0 9.Ng5 Be7 10.Ra2 g6 11.Qf3 Qd8 12.Qh3 h5; 7...Bc5 8.Qe2 0-0 9.0-0 Qc7 10.h3 Bd6 11.Na3 e5 12.e4 Re8; 7...Qc7 8.Na3 cb5 9.Nb5 Bb5 10.ab5 Nbd7 11.Ra2 Bd6 12.Qa1 0-0) 8.0-0 Qc7 9.Bf6 gf6 10.Nc3 c5 11.g3 f5 12.Qb1 Rg8; B) 7.Be5 Ng4 (7...cb5 8.ab5 Ne4 9.Nc3 f6 10.Bd4 Nc3 11.Bb6 Nd1 12.Kd1 Na6; 7...Ne4 8.Nc3 f6 9.a5 Qd8 10.Bg3 Nc3 11.dc3 Bc5 12.a6 b6) 8.Bd4 Qc7 9.h3 Nf6 10.Nc3 Bd6 11.Bf6 gf6 12.Bd3 c5; C) 7.Na3 a6 (7...Bc8 8.Bd3 Nbd7 9.0-0 Bd6 10.Rb1 Qc7 11.c4 Nc5 12.Bc2 0-0; 7...Bd6 8.Bd3 0-0 9.0-0 Qc7 10.Bf6 gf6 11.c4 f5 12.bc6 Bc6; 7...cb5 8.ab5 Ne4 9.Bd3 f6 10.Nh4 Nc5 11.0-0 Nd3 12.cd3 Kf7; 7...Ne4 8.Bd3 Nc5 9.Ng5 Nd3 10.cd3 Ba3 11.Ba3 h5 12.Qc2 f6; 7...c5 8.Ne5 Bc8 9.Bd3 c4 10.Bd4 Bc5 11.a5 Qd6 12.Bc5 Qc5) 8.Bd3 ab5 9.ab5 Ra5 10.Nd4 e5 11.Nb3 Ra4 12.c4 cb5; D) 7.Bd4 c5 (7...Qc7 8.Nc3 Bd6 9.Bf6 gf6 10.Bd3 Rg8 11.g3 f5 12.0-0 c5) 8.a5 Qc7 9.Be5 Bd6 10.b6 Qc6 11.Nc3 Be5 12.Ne5 Qd6; E) 7.Nc3 Bd6 (7...a6 8.a5 Qd8 9.Na4 ab5 10.Nb6 Ra7 11.Bd4 c5 12.Bb2 Bd6; 7...cb5 8.ab5 Bd6 9.Na4 Qc7 10.Rc1 0-0 11.c4 Qa5 12.c5 Be7) 8.Bd3 0-0 9.0-0 cb5 10.Nb5 Bb5 11.ab5 Nbd7 12.Qb1 e5.

4.a4 c6 5.e3 (--> 3.b5 c6 4.e3 Bd7 5.a4).

4.a4 Nf6 5.e3 c6 6.c4 Be7 7.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 Bd7).

4.d3 Bb5 5.Nf3 Nd7 6.a4 Ba6 7.e3 Ngf6 8.Be2 Bd6 9.0-0 0-0 10.Nbd2 Re8 11.Nb3 Rc8 12.c4 dc4 13.dc4 b6 14.Nfd4 c5 15.Nb5 Bb5 16.ab5 Bb8 17.Qc2 Qc7 18.g3 e5 19.e4 Qb7 20.Nd2 Nf8 21.Bf3 Ne6-/+ 22.Bg2 Rcd8 23.Rfe1 Nd4 24.Qc3 Qe7 25.Nf1 Qe6 26.Ne3 Re7 27.Bc1 h6 28.Ra2? Nh7 29.Nd5=+ Red7 30.Qd3 Nf6 31.Qf1 Qd6 32.Kh1 Nd5 33.ed5 Qf6 34.Qd3 Re7 35.f3 Rde8 36.Rf1 Qf5 37.Qe4 Rd8 38.g4 Qe4 39.fe4= f6 40.h4 Nb3 41.Be3 Na5 42.Rc2 Rf7 43.g5 fg5 44.Rf7 Kf7 45.hg5 Rd6 46.Bh3 hg5 47.Be6 Re6 48.de6 Ke6 49.Bg5 Bd6 50.Kg2 Be7 51.Be3 Kf6 52.Kf3 Kf7 53.Ke2 g5 54.Kf3 Kg6 55.Kg4 Kf6?? 56.Bf2 Ke6 57.Bg3 Bd6 58.Kf3 Bb8 59.Ke3+/– Bd6 60.Kd3 Nb3 61.Rh2 Nd4 62.Rh8 Bc7 63.Ra8 Kd6 64.Rg8 Ne6 65.Ra8 Ke7 66.Ra7 Kf7?? 67.Be5+- (67...Ke7 68.Bc7+-) 1–0. Krafzik,Joachim (1840) – Erdmann,Wolfgang, 18sen.Bay.EM2006 Schney op, 2006.

4.Nf3 Bb5=+ 5.a4 (5.Nc3 Bc6=+) 5...Ba6-/+ 6.Nc3 Nf6 7.Nb5 Bc5 8.e3 0-0 (8...Nbd7 9.Be2-/+) 9.Bf6=+ Qf6 (better 9...gf6 10.c4 dc4 11.Bc4 Nd7=+) 10.Nc7+- Bf1 11.Kf1 Nc6 12.Na8 Ra8 13.Rb1 b6 14.c3 Ne5?? (better 14...Rc8+-) 15.Ne5+- Qe5 16.d4 Bd4 (16...Qe4 17.dc5 Qc4 18.Qe2 Qc5 19.Rb3+-) 17.cd4 (worse 17.Qd4 Qf5 18.Ke2 Rd8+-; worse 17.ed4 Qc7+-) 17...Qe4 (17...Qc7 18.Rc1 Qd7 19.g3+-) 18.Rc1 e5 (18...Qh4 19.Rc7+-) 19.Rc7 (19.de5 Qe5 20.h4 Re8+-) 19...ed4 20.ed4 a5 (20...g6 21.f3 Qf4 22.Rb7+-) 21.h4 h6 (21...Qf4 22.Qc1 Qc1 23.Rc1+-) 22.Rh3 g5 (22...Qf4 23.Rhc3 Rf8+-) 23.hg5 hg5 (23...h5 24.Qh5 Qb1 25.Ke2 Qe4 26.Re3+-) 24.Qh5 Qd4 (24...Qb1 25.Ke2 Qb2 26.Kf3 Qb3 27.Kg4 Qd1 28.Kg5 Qd2 29.Kf5 Qf2 30.Rf3 Qf3 31.gf3 Rf8 32.Kf6 Rd8 33.Qf7 Kh8 34.Qh7) 25.Qf7 1–0. GuestGNVN – GuestLSWG, freechess.org, 2020.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bb4 8.c3 Be7 9.Qb3 Nf6 10.d3 (better 10.c4!?=) 10...0-0 11.Nd2 c6 12.c4 (12.b6 Na6 13.d4 c5-/+) 12...cb5 13.cb5 (13.Bf6!? Bf6 14.cd5-+) 13...Qa5-+ 14.Bc3 Qb5 15.Qb5 Bb5 16.Be2 (16.Bf6 Bf6 17.d4 Ba4-+) 16...Nc6 (better 16...Rc8!? 17.Bb2-+) 17.Ngf3 Bb4 18.Bb4 (18.d4 Bc3 19.Bb5 Ne4-+) 18...Nb4 19.Ne5 Ra8 20.0-0 Ra2 21.Rd1? (21.Rb1 Nd3 (21...Rd2?! 22.Rb4 Ba6 23.Bf3-/+) 22.Bd3 Bd3 23.Nd3 Rd2-+) 21...g6 (better 21...Ba4 22.Rb1 Rd2 23.Rb4 Re2-+) 22.Kf1 (22.Bf1 Ne8 23.Ndf3 Nc2-/+) 22...Ne8-+ 23.d4 Be2 24.Ke2 Nd6 25.Kf3 (25.Nd3 Nc6-+) 25...Nf5 (25...f6!? 26.Nd7 Kf7 27.Nc5-+) 26.Nb3 (26.Ke2 b5-/+) 26...f6-+ 27.Ng4 (27.Nd7!? Kf7 28.Rd2-+) 27...Kg7 28.Rc1 (28.h3 Nc6 29.Nc5 h5 30.Ne6 Kf7-+) 28...Nc6 29.h3 (29.Nc5 h5 30.Ne6 Kf7 31.Nf6 Ke6-+ (31...Kf6?! 32.Nf4-+)) 29...Nh4 (better 29...h5 30.Nc5 e5 31.Ne5 fe5 32.g4 e4 33.Ne4 de4 34.Ke4 hg4 35.hg4 Nd6 36.Kd5-+) 30.Kg3 g5 31.Nc5 Nf5 32.Kf3 Nd8?? (32...h5 33.Nb7 hg4 34.hg4-+) 33.Nb7? (better 33.Nd7 Nh4 34.Kg3-/+) 33...Nb7-+ 34.Rc7 Kg6 35.Rb7 Ra6?? (better 35...h5 36.Rb6 hg4 37.hg4 Nh4 38.Kg3 Kf7 39.Rb7 Kf8 40.Rb8 Ke7 41.Rb7 Kd6 42.Rb6 Kd7 43.Rb7 Kc6-+) 36.g3=+ h5 37.Nh2 Rd6 (37...Nd6 38.Rb2=+) 38.Nf1 e5 39.de5 fe5 40.Nd2 d4 41.e4 Ng7 (41...Nh6 42.Nc4 Re6 43.Ke2=) 42.Nc4 Rd8?? (better 42...Re6=) 43.Ne5+- Kh7 44.Nd3 (better 44.Nf7 Rf8 45.Ke2+-) 44...g4?? (better 44...Rf8 45.Ke2 Kg8+-) 45.hg4 hg4 46.Kg4 Kh6 47.f4 Ne6 (47...Rg8+-) 48.Rb6 Re8 (48...Rg8 49.Kf5 Kh7 50.Re6+-) 49.f5 Rg8 (49...Kg7 50.fe6 Rc8 51.Kf5 Rf8 52.Ke5+-) 50.Kf3 Kg5 51.fe6 Re8 (51...Kf6 52.e5 Kg7 53.Ke4+-) 52.Rd6 1–0. invictus31 – parniyan100, lichess.org, 2017.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bd6?? 8.Nf3 (better 8.Bg7 Be5 9.Be5+-) 8...Nf6= 9.d4 (9.Be5 0-0=) 9...0-0=+ 10.Bd3 Qe8 (10...c6 11.bc6 Nc6 12.c4=+) 11.Nc3= Bb4 (11...c6 12.Qe2=) 12.Qb1 (12.0-0 Bd6=) 12...Ba5 (12...Qe7 13.0-0=) 13.0-0+= Ne4? (better 13...Qe7!?+=) 14.Ne4+- de4 15.Be4 Bb5 16.Bh7! Kh8 (16...Kh7 17.c4 Double attack) 17.Rc1 (17.Bd3!? Bd3 18.cd3 Bb6+-) 17...g6+- 18.c4 (18.Bg6 fg6 19.d5 e5 20.Be5 Kg8+-) 18...Bc6 (18...Ba6 19.Qe4 Kh7 20.Ng5 Kg7 21.d5 e5 22.Be5 f6 23.Ne6 Kg8+-) 19.Ng5 Nd7? (better 19...Qe7 20.h4 Bd7+-) 20.d5 f6 (20...e5 21.Qe4 Bd5 22.cd5 Qd8+-) 21.Bg6 Qe7 22.dc6 bc6 23.Qe4 e5 (23...Nc5 24.Qh4 Kg8+-) 24.Qh4 Kg8 25.Bh7 Kg7 26.Bf5 fg5 27.Qh7 Kf6 28.Qg6 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7).

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 cb5 9.cd5 ed5 10.Nf3 Bc6 11.Qb3 Exerts pressure on the isolated pawn 11...Qa5 (11...Nd7 12.Bd4=) 12.Bc3 Qa4 13.Qa4?? (better 13.Qb2 Qg4 14.Ne5=) 13...ba4-/+ 14.Be2 (14.Nd4 Nd7-/+) 14...Nf6 (14...b5 15.Be5 Nd7 16.0-0-/+) 15.0-0 (15.Bf6 gf6 16.Nd4 Rg8-/+) 15...Bd6 (better 15...Nfd7!?-+) 16.Bf6-/+ gf6 17.d4? (17.Nc3!?=+) 17...Nd7 (17...b5 18.Nc3 b4 19.Nb5-+) 18.Nc3-/+ a3 19.Bb5 (19.Ra1 0-0=+) 19...Ke7 20.Bc6 bc6 21.e4 (better 21.Rb1-+) 21...Ra8 (better 21...Bb4!? 22.Na2 de4 23.Nb4 ef3-+) 22.ed5=+ cd5 23.Nd5 Kf8 (23...Ke6 24.Nc3=+) 24.Nd2 (better 24.Ra1!?=) 24...a2 25.Nb3 (25.Ra1 Ra5 26.Ne3 Bb4-/+) 25...Ba3 26.Nc7? (better 26.Ne3-/+) 26…Rb8-+ (26...Rb8 27.Na1 Rb1-+) 0-1. Xaver (1625) - subaido (1700), Rated Classical game, lichess.org, 2013.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 dc4 9.Bc4 cb5 10.Bb3 Nc6 11.Nf3 Bb4?? 12.Bg7+- Bc3 13.Nc3 Nf6 14.Bh8 Ke7 15.Bf6 Kf6 16.Ne4 Ke7 17.0-0 b4 18.Qc2 b6 19.d4 Na7 20.d5 Nb5 21.de6 fe6 22.Neg5 Qg8 23.Nh7 Nc3 24.Nfg5 e5 25.Qd3 Kd8 26.Bg8 (26...Ke7 27.Qc4+-) 1–0. ZZMeB4 (1695) – pawncrusher5 (1710), caissa.com, 2007.

5.a4 Nf6=+ (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Bd7).

5.c4 dc4 6.ba6 Na6 7.Bc4 Bc6 8.Nf3 Bb4 9.Bg7 (Black forfeits on time, 1–0). Machete99 – guest208, ICC, 2002.

5.e3= b6 6.Be2 c6 7.a4 a6 8.Ne5 ab5 9.ab5 Ra1 10.Ba1 cb5 11.Nd7 Nbd7 12.Bf6 Qf6 13.Bb5 Qb2 14.c4 dc4= 15.Nc3 Bb4=+ 16.0-0 Bc3 17.Bd7 Kd7 18.dc3 Ke7 19.Qd4 Rd8 20.Qc4 f6 21.h3 Rd2 22.Qc8 f5 23.e4 fe4 24.Qb7 Kf6 25.Qe4 Qc3 26.Re1 Rd6= 27.Re3 Qc7 28.Rf3 Ke7 29.g3 Rd1 30.Kh2= h6 31.Qh4 Kd6 32.Qf4 e5 33.Qf8 Qe7 34.Qb8 Qc7 35.Qf8 Qe7 36.Qg8 Qb7 37.Qd8+= Qd7 38.Qb6 Qc6 39.Qd8 Qd7 40.Qb8 Qc7 41.Qf8 Qe7= 42.Qa8 Qc7 43.Rf8 Rd4 44.Rc8 Qb6 45.Rb8 Qc7 46.Rb7 Qc6 47.g4 g6 48.Qd8 Kc5+/– 49.Qa5 Kd6 50.Rg7 Qc2?? 51.Qa6 Kd5 52.Rd7 (52...Ke4 53.Qg6 Kf3 54.Rf7 Rf4 55.Rf4 Ke2 56.Qc2 Ke1 57.Re4 Kf1 58.Qe2) 1–0. Nemec,Zdenek (1800) – Valica,Slavo (1800), corr ICCF EM/O/131, 2003.

5.c4 dc4 6.Bc4 c5?? 7.a4?? (7.Qf3 Na6 8.ba6 Ne7+-) 7...Be7?? (better 7...a6+=) 8.Qf3+- Bf6 9.Bf6 Qf6 10.Nc3?? (better 10.Qa8 Qa1 11.Qb8 Ke7 12.Bd3 Qa4 13.Ne2+-) 10...Qf3+- 11.Nf3 (11.gf3?! a6=) 11...Ne7 (11...a6 12.Ke2 Nf6 13.d3+=) 12.Ne5 (12.a5 Nc8 13.Nd5 ed5 14.Bd5 Bb5 15.Ba8 Nc6 16.ab6 ab6+-) 12...0-0 (12...Bc8 13.Ne4 0-0 14.Nd6+-) 13.Nd7 (better 13.a5!? ba5 14.Ra5+- (14.Nd7?! Nd7 15.d3 Nb6+=)) 13...Nd7+= 14.0-0 (14.a5 Ne5 15.Be2 Rad8+=) 14...Ne5= 15.Be2 Rad8 16.Rad1 (16.f4 Nd3=) 16...Nd5 (16...Nd3 17.Ra1=) 17.Nd5 ed5 18.f4 (18.d4 Ng6+=) 18...Nc4= 19.Bc4 dc4 20.Rf2 Rd3 (20...c3 21.Rc1 cd2 22.Rd1=+) 21.Rc1= Rfd8 22.Rc2 Ra3 23.Rc4 Ra1 24.Rf1 Rf1 25.Kf1 Rd2 26.g4 (26.e4 Kf8=+) 26...g6 (26...Rh2 27.Kg1 Rb2 28.Re4-+) 27.h4 (27.h3 Rh2=+) 27...Kg7 (27...Rh2 28.g5-/+) 28.f5 (28.Re4 Ra2=) 28...Kf6 (28...gf5 29.gf5 h5 30.Ke1-/+) 29.Rf4 (29.fg6 Kg6 30.g5 Rb2=+) 29...Rb2 (better 29...g5 30.hg5 Kg5-/+) 30.e4?? (better 30.g5 Ke5 31.fg6 fg6 32.Rf7=) 30...Rb4 (30...g5 31.Rf3 gh4 32.e5 Ke5 33.Rh3-+) 31.fg6 (31.g5 Ke7-/+) 31...Kg6-+ 32.h5 Kg7 33.h6 Kg6 34.g5 Kg5 (better 34...Ra4!? 35.Kf2 Rb4-+) 35.Rf7-/+ Ra4 36.Rh7 Kg6 37.Rh8? (better 37.Re7 Kh6 38.Ke2-/+) 37...Re4-+ 38.Kf2 Rh4 (38...Rb4 39.Ra8-+) 39.Ra8 (39.Ke3 Rh6 40.Rg8 Kf5-+) 39...Rb4 40.Ra7 Kh6 (40...Rb5?! 41.h7 Rb2 42.Kg3 Rb3 43.Kg4 Rb4 44.Kg3 Rb3 45.Kg4 Rb4 46.Kg3 Rb3=) 41.Rb7 Rb5 42.Ke2 (42.Rc7 Rb4-+) 42...Rb4 43.Kd2 Kg6 44.Kc3 (44.Rc7 Kf5-+) 44...Kf5 (44...b5 45.Rb8-+) 45.Rf7 Ke6 46.Rf2 (46.Rh7 b5-+) 46...Kd5 (46...b5 47.Rf8-+) 47.Rd2 (47.Rf5 Ke4 48.Rh5 Rd4-+) 47...Rd4 48.Rd4 (48.Rb2 Kc6 49.Rg2-+) 48...cd4 49.Kd3 b5 50.Kd2 Kc4 51.Kc2 d3 52.Kd2 b4 53.Kc1 b3 54.Kb2 (54.Kd2 b2 55.Ke1 b1Q 56.Kd2 Qb6 57.Ke1 Qg1 58.Kd2 Qf2 59.Kd1 Qe2 60.Kc1 Qc2) 54...d2 55.Kb1 (55.Ka3 d1Q 56.Kb2 Qc2 57.Ka3 Qa2) 55...d1Q (55...Kc3 56.Ka1 d1Q) 56.Kb2 Qc2 57.Ka3 Qa2 0–1. afsharian (1645) – DiegoTody (1790), lichess.org, 2018.

5.Nf3 a6 6.a4 c6 7.Ne5 ab5 (7...Nf6 8.Na3=) 8.Nd7 (8.ab5 Ra1 9.Ba1 Qc7+=) 8...Qd7 (8...Nd7 9.ab5 Ra1 10.Ba1=) 9.ab5 Ra1 10.Ba1 c5 11.c4 Be7?? (better is 11...Qa7 would be a reprieve 12.Nc3 Nf6=) 12.Bg7+- Bf6 13.Bh8 (13.Qg4 and White can already relax 13...e5 14.Qd7 Nd7 15.Bh8 Bh8 16.cd5 e4+-) 13...Bh8 14.d4 (14.Qg4!? seems even better 14...Kf8+-) 14...cd4 15.ed4 (better is 15.Qd3!? and White can already relax 15...Ne7 16.Qh7 Bf6+-) 15...dc4 16.Bc4 Bd4 (16...Qd4 17.Nd2+-) 17.Be2 (17.Qg4 seems even better 17...Kf8+-) 17...Qd6 18.0-0 Nf6 19.Bf3 Qc5 (19...Nbd7 20.Qa4+-) 20.Qe2 (20.h3 keeps an even firmer grip 20...Be5 21.Qa4 Bd6+-) 20...e5 (20...Kf8 21.Nd2 Qc2 22.Re1+-) 21.Re1 (21.Nd2 might be the shorter path 21...Qa3+-) 21...Kf8 22.g3 (22.Nd2 makes it even easier for White 22...Nbd7+-) 22...Kg7 (22...e4 23.Bg2 Ng4 24.Qg4 Bf2 25.Kf1+-) 23.Nd2 Nbd7 24.Nb3 Qb4 25.Nd4 Qd4 26.Rd1 Qc5 27.Bg2 Qe7 28.Qd2 e4 29.Qg5 Kf8 30.Ra1 Qd8 31.Be4! Nc5 32.Ra8 (32.Ra8 Nce4 33.Rd8 Ke7 34.Qe5 Kd8 35.f3+-) 1–0. Satka,Martin – Hintze,Hans, Brandenburg Seniors op, 2002.

5.a4 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.a4 e6 4.b5 c5 5.e3 Bd7).

5.c4 a6 6.Qf3 =.

5.c4 dc4 6.Bc4 Qa5 7.a4+= Nf6 8.Nf3 Be7 9.0-0 0-0 10.Ne5 Bd6 11.Ng4 Ng4 12.Qg4 Threatening mate: Qxg7 12...e5 13.Qe4 Kh8?? (better 13...Qc7+-) 14.Bd3+- (14.Be5?! Be5 15.Qe5 a6 16.Qc5 Rc8+-) 14...f5 15.Qb7 Bb5 (15...e4 16.Be2 Qc7 17.Qa8 Nc6 18.Qf8 Bf8 19.bc6 Bc6+-) 16.ab5 (16.Qa8 Bc6 (16...Bd3 17.Qd5 Qa6 18.Rc1+-) 17.Qc6 Nc6-/+; 16.Bb5 Qb4 17.Qa8 Qb2+-; 16.Qb5?! Qc7 17.e4 Nc6+-) 16...Qa1 (16...Qc7 17.Qa8 Na6+-) 17.Ba1 (17.Ba1 Nd7 18.Qd7+-; 17.Qa8?! Qb2 18.Qd5 Rd8+-) 1–0. DEFFM – GuessICC, freechess.org, 2020.

5.c4 Bd6 6.Nf3 Nf6 7.Be2 0-0 8.a4 a6 9.Qb3 ab5 10.ab5 Ra1 11.Ba1 Qe7 12.Nc3 dc4 13.Bc4 e5 14.Nd5 Nd5 15.Bd5 e4 16.Ng1 Bg4 17.Qc3 Qg5 18.h4 Qh6 19.Bb7 Nd7? (better is 19...Re8!?=) 20.Be4+/– Be5 21.Qa3 Ba1 22.Qa1 Qe6 23.Qb1 f5 24.Bd3 Ne5 25.f3 Bh5 26.Ne2 Qg6 27.Kf2 Qd6 (better is 27...c4!? 28.Bc2 Qf6+-) 28.Bf5+- Qd2 29.Bh7 Kh8 30.Be4?? (better is 30.Bf5+-) 30...Ng4= 31.Kg3 Qe3?? (better is 31...Qe2 32.Qe1 Qe3 33.Qe3 Ne3+=) 32.Qd1?? (better is 32.Qg1 Qe2 33.Qc5+-) 32...Qf2 33.Kh3 Ne3 34.Qg1 Qe2 35.Qh2?? (35.Kg3 Rb8 36.Qf2 Nf5 37.Bf5 Qe5 38.f4 Qf5-+) 35...Rf4 (35...Bf3 36.Bf3 Rf3 37.gf3 Qf3 38.Qg3 Qh1 39.Qh2 Qf3 40.Qg3 Qf5 41.Kh2 Nf1 42.Kg2 Ng3 43.Kg3-+) 36.b6?? (better is 36.Qg3-+) 36...Re4! 37.b7 Bg4! 38.Kg3 Nf5 0–1. Anfilatov,Dmitri – Metsalu,Tauno, Keres mem op, 2000.

5.c4 Nf6 6.Nf3 Be7 (6...a6 7.Qa4+=) 7.Be2 0-0 8.0-0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Be8 12.d3 Nbd7 13.Qb3 Nb6 14.Nc3 (14.Nbd2 Bd6+=) 14...Qc7 15.h3 Bd7 16.Na4 Ra8 17.Nb6 Qb6 18.Bb2 h6 19.Ra1 Ra1 20.Ba1 dc4 21.dc4 Ne4 22.Bd3 Nf6 (22...Nd6 23.e4+-) 23.Bc2 Qd8 24.e4 Bc8 25.e5 Nh7 26.Qe3 Qa5 27.Bc3 Qc7 (27...Qa3 28.h4+-) 28.Qe4 (28.Nd2 b6+-) 28...Nf8 29.Nh2 (29.Qg4 Nd7+-) 29...b6+= 30.Ng4 (30.Qc6 Qb8+=) 30...Bb7 31.Qd3 Qd8 32.Qg3 (32.g3 h5 33.Ne3 h4=) 32...Kh8 (32...Ng6 33.Ne3=) 33.Qf4+= Kg8 (better 33...Qe8!?+=) 34.Nf6!+- Kh8 (34...gf6 35.ef6 Decoy) 35.Nh5 (35.Ne4 Be4 36.Qe4 f5+-) 35...Qe8 36.Qg3 Ng6 37.Bg6 (37.Qg4 Bc8+-) 37...fg6+= 38.Nf4 (38.Nf6 Qf7 (38...gf6? 39.ef6 Bf6 40.Bf6 Kg8 41.Qc7+-) 39.Qd3 Bc8+= (39...gf6? 40.Qd7 Kg8 41.Qb7+-)) 38...Kh7 (better 38...g5!? 39.Nd3 Qg6=+) 39.Ne6+= Qf7 (better 39...Bh4! 40.Qh4 Qe6+=) 40.Nf4+- Bg5?? (better 40...Qf5 41.Nd5 Bd8+-) 41.e6 Qf8 (41...Qc7 42.Nd5 Qg3 43.fg3+-) 42.Nd5 Bd5 (42...Bd8 43.Qb8 Bd5 44.cd5+-) 43.cd5 Bf4 (43...Kg8 44.d6 Qf4 45.Qf4 Bf4 46.d7+-) 44.Qd3 (better 44.e7 Qf5 45.Qf4 Qf4+-) 44...Bd6 45.Qe4 Qe8 (45...c4 46.Qc4 Bc5+-) 46.Qf3 (better 46.Be5 Bf8 47.Bc7+-) 46...Qd8?? (46...Qb5 47.g3 Qe8+-) 47.Qf7 Bf8 (47...Qg8 48.Qd7 Qf8 49.Bg7 Qg7 50.Qd6 Qa1 51.Kh2 Qf6 52.Qc7 Kg8 53.Qb8 Qf8+-) 48.Bg7! Bg7 (48...Bg7 49.e7 Passed pawn) 49.e7 Qd7 50.e8Q Qe8 51.Qe8 c4 52.d6 c3 53.Qc6 c2 54.Qc2 Bf6 (54...h5 55.Qa2 Kh8 56.Qf7 Be5 57.Qe8 Kh7 58.Qe5 Kh6 59.Qf6 Kh7 60.d7 g5 61.d8R g4 62.Rh8) 55.Qc7 Kg8 (55...Kh8 56.d7 Kg8 57.Qb6 Bg5 58.Qb8 Kg7 59.Qc7 Bd8 60.Qd8 Kf7 61.Qe8 Kf6 62.d8Q Kf5 63.Qd4 h5 64.Qee5) 56.d7 Bg5 (56...Be7 57.Qb6 Kg7 58.Qd4 Bf6 59.d8Q Bd4 60.Qd4 Kh7 61.Qd7 Kg8 62.b6 g5 63.b7 Kf8 64.b8Q) 57.Qb6 Kf7 (57...Kg7 58.Qc7 Bd8 59.Qd8 Kf7 60.Qe8 Kf6 61.d8Q Kf5 62.Qd4 h5 63.Qee5) 58.d8Q Bd8 59.Qd8 g5 (59...h5 60.b6 Kg7 61.b7 h4 62.b8Q Kh6 63.Qf6 Kh5 64.Qbh8) 60.b6 g4 (60...Kg6 61.b7 g4 62.Qe8 Kg7 63.b8Q h5 64.Qh5 gh3 65.Qbh8) 61.b7 gh3 62.b8Q h2 63.Qh2 Kg6 64.Qe8 Kg7 65.Qc7 Kf6 66.Qce5 1–0. Bishard,Ekaterina – Kazkova, Leningrad–Moscow m, 1960.

5.d4 c4-/+ 6.a4 Bb4 (6...a6 7.Nc3-/+) 7.Nc3 (7.Bc3 Bd6=) 7...Qa5 (7...Nf6 8.Nge2-/+) 8.Nge2 Nf6 9.Qd2?? (better 9.f3-/+) 9...Ne4-+ 10.Qc1 (10.Ne4 Bd2 (worse 10...de4 11.Bc3 Bc3 12.Qc3+/-) 11.Nd2 a6-+) 10...Nc3 (10...Bc3?! 11.Nc3 Qb4 12.Ra3=+) 11.Bc3 Bc3 12.Nc3 Qc3 13.Kd1 0-0 14.Qa3 Qa5 15.Qd6 (15.Rb1 a6 16.Qb4 ab5 17.ab5 Qb4 18.Rb4 Ra5-+) 15...Qd8 (15...Rc8 16.Qa3-+) 16.Rb1 Bc8 (16...a6 17.f3-+) 17.Qf4 (17.Qd8 Rd8 18.Be2 a6-+) 17...Nd7 (17...Qa5 18.Qd6-+) 18.Be2 (18.Qd6 a6-+) 18...Nf6 19.Bf3 Qa5 20.Qg3 (20.Qd6 Qa4 21.Qb4 Qb4 22.Rb4 a6-+) 20...Qa4 21.Kd2 (21.Qd6 a6-+) 21...Bd7 22.h4 (22.b6 c3! 23.Kd1 ab6-+) 22...Bb5 23.h5 (23.Qc7 Rfc8 24.Qe7 c3 25.Kc1 Bd3-+) 23...h6 (23...c3!? 24.Kd1 Bd3 25.Rc1-+) 24.Qc7 Qa6 (better 24...Rfc8!? 25.Qf4-+) 25.Qc4 0-1. onikichi - nikfom57, Rated Classical game, lichess.org, 2013.

5.a4!? =.

5.c4 dc4 6.Bc4 cb5 7.Bb3 Nf6 8.Nf3 a5 9.0-0 a4 10.Bc2 a3 11.Bc1 Bd6 12.e4 Ng4 13.g3 Qf6 14.d4 Bc6 15.Nbd2 e5 16.d5 Bd7 17.Nb3 h5 18.Nh4 g5 19.Ng2 h4 20.h3 Nh6 21.g4 Na6 22.f3 Nc5 23.Qd2 Nb3 24.Qg5?? Qg5-+ 25.Bg5 Na1 26.Ra1 Be7 27.Be3 Rc8 28.Bd3 Bc5 29.Rb1 Be3 30.Ne3 Rc3 31.Bb5 Re3 32.Kf2 Rc3 33.Bd7 Kd7 34.Re1 Rc2 (35.Re2 Rhc8-+) 0–1. valpa – abzgpf, HCL–B1684 playchess.de, 2003.

5.c4 dc4=+ 6.Bc4 cb5 7.Bb3 Nf6 8.Nf3 Bd6 9.0-0 0-0 10.Bc2 Bc6 11.Ng5 (11.Nd4 Nbd7-/+) 11...Nbd7 12.f4 h6 13.Nf3 Qb6 14.Kh1 (14.Ne5 Rfc8 15.Nd7 Nd7-/+) 14...Rad8 15.Nc3 a5 16.Qe1 Bb8 (16...b4 17.Ne2-/+) 17.Nd4 Nc5 (17...e5 18.Nf5 ef4 19.ef4-/+) 18.Qg3 Rfe8 19.Nc6 Rd2?? (19...bc6 20.Nd5 ed5 21.Bf6 Ne6+=) 20.Nd5!+- Do you see the mate threat? 20...ed5 (20...Nd5 21.Qg7) 21.Bf6 Threatening mate... how? 21...g6?? (21...Ne6 22.Nd4 Ng5 23.Bg5 hg5 24.Qg5 Qd8+-) 22.Bg6! (22.Nb8 Qf6 23.Rac1 Qd6-/+ (worse 23...Rb8 24.Qe1 Rc2 25.Rc2=)) 22...Ne6 (22...fg6 23.Qg6 A double attack) 23.Bf5 Ng5 (23...Kf8 24.Be6 Rg2 25.Qg2 Re6 26.Qg7 Ke8 27.Qg8 Kd7 28.Nb8 Kd6 29.Qf8 Kc7 30.Qd8) 24.Ne7 (24.fg5 Bg3 25.gh6 Kf8 26.h7 bc6 27.h8Q) 24...Kf8+- 25.Bg5 (better 25.Bc3 Re7 26.Bd2 Ne4 27.Be4 Re4+-) 25...hg5 26.Qe1 gf4 27.Qd2 fe3 28.Ng6 (28.Nd5?? Qd6 (28...ed2?? 29.Nb6 Ba7 30.Nc8+-) 29.g3 ed2-+) 28...fg6 (28...Qg6 29.Bg6 ed2 30.Bf7 Rd8+-) 29.Qd5 e2 (29...Bf4 30.Bg6! Qf6 31.Be8 e2+-) 30.Bg6 ef1Q 31.Rf1 Kg7 (31...Qf2 32.Rf2 Kg7 33.Qf7 Kh6 34.Qh7 Kg5 35.Qh5) 32.Qf7 Kh6 33.Qh7 Kg5 34.Qh5 1–0. Wall,Bill – Gabriel,Bob, Dayton, OH, 1981.

5.c4 dc4 6.bc6 Bc6 7.f3 b5 8.d3 cd3 9.Bd3 Qg5 10.Qe2 Bb4 11.Bc3 Bc3 12.Nc3 Nf6 13.Nh3 Qe5 14.Qd2?? (14.Rc1 a6=+) 14...0-0 (better is 14...b4-+) 15.0-0 Nd5 16.Nd5 Bd5 17.e4 Bc6 18.Nf2 Rd8 19.Qe2 Nd7 20.Rab1 a6 21.Rfc1 Bb7 (21...Rac8 22.Qe3-/+) 22.Ng4 (better is 22.a4!?=) 22...Qd4-/+ 23.Qe3 Qe3 24.Ne3 Ne5 25.Be2 Rac8 26.Rc8 Rc8 (26...Bc8 27.Rc1-/+) 27.Rd1? (better is 27.a4!?=) 27...Kf8-/+ 28.h3 Rc2?? (better is 28...h5-/+) 29.Nc2+- (29...Ke7 30.Ne3+-) 1–0. valpa – Holodoc, HCL–C2319 playchess.de, 2003.

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

5.bc6 Nc6 6.Bb5 (6.Nf3 Nf6=) 6...Nf6=+ 7.Bc6 (7.Nf3 Bd6=+) 7...Bc6 8.d4 (8.Nf3!?=+) 8...Bd6-/+ 9.Nf3 Bb5 10.a4 Ba6 (10...Bc4 11.Ne5-/+) 11.Nbd2 Rc8 12.Rc1 (12.Ba3!?-/+) 12...Qa5 13.c3 0-0 14.Qb3 (14.Ne5-/+) 14...Nd7 (14...Bd3!?-+) 15.Ba3-/+ Ba3 16.Qa3 Nb6 17.Nb3 (17.e4 Bd3 18.Nb3 Qa4 19.Qa4 Na4 20.ed5 ed5-/+ (< 20...Rc3 21.Rc3 Nc3 22.de6=; 20...Nc3?! 21.Nc5 Rc5 22.dc5 Nd5 23.Ne5=+)) 17...Qa4 18.Qa4 Na4 19.Kd2 Rc7 (19...Nb6 20.Ra1-/+) 20.Rc2 (20.Ne5 Rfc8-+) 20...Rfc8-+ 21.Rhc1 f6 22.Ne1 Bb5 23.Nd3 Nb6 24.Nb2 Nd7 25.f4 f5 26.h3 b6 27.Ra1 Nf6 28.Nd1 Ne4 29.Kc1 Nc3 30.Nc3 Rc3 31.Rc3 Rc3 32.Kb2 Re3 33.Ra7 Bc4 34.Nd2 b5 35.Nc4 bc4 36.Ra2?? Re2 37.Kb1 Ra2 38.Ka2 Kf7 39.Kb2 Kf6 40.h4 g6 (41.Kc3 h6-+; 40...h6 41.Kc3-+) 0–1. Kiralyhegyi,I – Simon,Nandor, Sarospatak op1, 1995.

5.a4 a6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Bd7).

5.a4 c6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd7).

4.a4 b6 5.e3 Nc5 6.Nf3 Nf6 7.c4 Be7 8.cd5 Nd5 (8...ed5 9.Ne5=) 9.Be2 (better 9.Bg7!? Rg8 10.Be5+-) 9...0-0= 10.0-0 Bd7 (10...Bb7 11.d4 Ne4 12.Ne5=) 11.d4+= Nb7 12.Ne5 f6 13.Nd7 Qd7 14.Nc3 Nc3 15.Bc3 Rac8 (15...c5 16.Bc4 Nd6 17.dc5 bc5 18.Rc1+-) 16.Bf3+- Nd6 (16...Nd8!?+-) 17.Bc6+- Qd8 18.Qb3 Rb8 (18...Kf7 19.a5+-) 19.Qe6 Kh8 20.Rfc1 Nf7 (20...f5 21.a5+-) 21.Bd5 (21.a5 Bd6+-) 21...Ng5 22.Qc6 Bd6 (22...f5 23.a5+-) 23.f4 Nf7 24.Bd2 (24.f5 Qe7 25.e4 Rbc8+-) 24...Nh6 (24...f5 25.a5+-) 25.h3 (25.e4 Ng8 26.Qc4 Ne7+-) 25...Nf7 (25...f5 26.Qc4+-) 26.Bf7 (better 26.e4!?+-) 26...Rf7 27.Rab1 (27.f5 Re7+-) 27...Rd7 (27...Bf4 28.Rc2 (28.ef4?! Qd4 29.Kh2 Qd2=) 28...Bg5 29.Rbc1+-) 28.Kf2 (28.f5 Ra8+-) 28...g6 (28...f5 29.Kg1+-) 29.Bb4 Kg7 (29...Qe7 30.Bd6 cd6 31.e4+-) 30.Bd6 Rd6? (better 30...cd6 31.Rc3 d5+-) 31.Qc7 Qc7 (31...Rd7 32.Qd8 Rbd8+-) 32.Rc7 Kh6 33.Rbc1 Rbd8 34.Ra7 Re6 (34...g5 35.fg5 Kg5 36.Rh7+-) 35.Rcc7 Rde8 (35...Rh8+-) 36.Rh7 1–0. BeepBeepImAJeep (2615) – EmmaShnuckles (1705), lichess.org, 2018.

4.a4 Ndf6 5.Nf3 Bc5 6.e3 Nh6 7.h3 0-0 8.Nd4 Ne4 9.Bd3 f5 10.Be4 fe4 11.0-0 Qe7 12.f3 ef3 13.Nf3 Nf5 14.Nc3 Qd6 15.Kh1?? (better is 15.Ne2=) 15...Ng3-+ 16.Kg1 Nf1 17.Qf1 e5 18.Qe2 Bd7 19.Nd1 Rae8 20.Nf2 d4?? 20...Bf5 21.c4-+) 21.ed4? (better is 21.Ne4 Qd5 22.Nc5 Qc5 23.Ba3 Qc2 24.Bf8-/+) 21...ed4-+ 22.Qd3 Bf5 23.Qc4 Be6 24.Qd3 Rf3 25.Qf3 Bd5 26.Qd3 Qe5 27.Ng4 Qd6?? 28.Bd4+= Be4?? 29.Qc4+- Kh8 30.Qc5 Qc5 31.Bc5 Bc2 32.Rf1 Ba4 33.Rf8 Rf8+/– 34.Bf8 Bb5 35.d4 g6 36.Ne5 Kg8 37.Bc5 Kg7? 38.Ba7+- Kf6 39.Nf3 Kf5 40.Bb8 c6 41.Nd2 h6 42.Kf2 Bd3 43.Kf3 b5 44.g4 (44.g4 Ke6 45.Bf4+-) 1–0. j1a9n55 – superos69, kurnik, 2011.

4.c4 Ngf6 5.e3 Be7 6.d4 0-0 7.Nc3 c6 8.a4 a6 9.Qb3 (9.Nf3 Qa5=) 9...ab5=+ 10.ab5 Ra1 11.Ba1 c5 12.cd5 Nd5 (12...cd4 13.ed4 Nd5 14.Nd5 ed5 15.Bd3=+) 13.Nd5 (13.Nf3 N5f6=) 13...ed5=+ 14.Qd5?? (14.dc5 Nc5 15.Qc3=+) 14...cd4 (better 14...Qa5 15.Bc3 Qc3 16.Kd1 Qa1 17.Ke2 Qb2 18.Kf3 Nf6-+) 15.Bd4 (15.Qd4!? Bf6 16.Qa4+=) 15...Qa5=+ 16.Ke2 Nf6 17.Qe5 (17.Bf6 Be6 18.Qd3 Bf6 19.Kf3-/+) 17...Be6 18.f3 Qa2 (18...Bb4 19.g3 Be1-+) 19.Ke1 (19.Bb2-+) 19...Bb4 20.Kd1 (20.Bc3 Qa1 21.Kf2 Bc3 22.Qc3 Qc3 23.Ne2-+) 20...Bb3 (20...Qd2) 21.Kc1 Rc8 (21...Qc2) 22.Bc5 (22.Bc4 Bd2) 22...Ba3 (22...Bd2) 23.Qb2 Rc5 (23...Rc5 24.Kd2 Qb2 25.Ke1 Rc1; 23...Qb2) 0-1. ClayPigeons (2205) - LordStanis (2195), Rated Bullet game, lichess.org, 2021.

4.e3 c5 5.c4 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7).

4.e3 Bd6?? 5.d4?? (better is 5.Bg7 Be5 6.Bh8 Bh8 7.d4+-) 5...Ne7 6.Nf3 f6 (6...0-0 7.c4 dc4 8.Bc4=) 7.Be2 0-0 8.0-0 c5 9.c4 b6 10.a4 a6 11.Nc3 a5 12.cd5+/– ed5 13.Qc2 c4? 14.Ba3?? Ba3+= 15.Ra3 f5 16.Nh4 g6 17.Nf3+= Nf6 18.Ne5 Kg7 19.Bf3 Ne4 20.Be4 fe4= 21.f4 Nf5 22.Qe2 h5 23.Raa1 Ra7?? 24.Kf2 Re7?? 25.h3?? Re5 26.de5 Qh4 27.Kg1+/– Qg3? 28.Nd5+- Nh4 29.Nb6?? Bh3 30.Rf2 c3 31.Nd5 Rc8 32.Rc1 Nf3 33.Rf3 ef3 34.Qf3 Qf3 35.gf3 c2 36.Kf2 Be6 37.e4 Kf7 38.b6 Kg7? 39.b7 Rb8 40.Rc2 Rb7 41.Rc7 Rc7 42.Nc7 Bb3 43.e6?? Kf8? 44.f5+- gf5 45.ef5 Ba4 46.f6 Bc6 47.Na6 Bd5 48.e7 Kf7+/– 49.Nc5?? Bc6-+ 50.Kg3 Kf6 51.Kh4 Be8 52.f4 Ke7 53.Kg5-/+ Bf7 54.f5 Be8 55.f6 Kf8 56.Kh4 Kf7 57.Kg5 h4! 58.Kh4 Kf6 59.Kg3 Ke5 60.Nd3? Kd4-+ 61.Nb2 Kc3 62.Nd1 Kd2 63.Nb2 Kc2 64.Nc4 a4 65.Kf4 Kc3 66.Na3 Kb3 67.Nb1 Kb2 68.Nd2 Bb5 69.Ke3 a3 70.Kd4 a2 71.Ne4 a1Q 0–1. popovicigelu – relaksi, kurnik, 2012.

4.Nf3 a6 5.e3 ab5 (5...Ngf6 6.ba6 ba6 7.Nd4=+) 6.Bb5 c6 7.Be2 Qb6 (7...Ngf6 8.0-0=) 8.Qc1 Ra5 (8...Ngf6 9.0-0=) 9.0-0 (9.Bc3 Ra4=) 9...h6 (9...Ngf6 10.Bc3 Ra7 11.Ne5=) 10.d4 (10.Bd4 c5 11.Bc3 Ra7+=) 10...Ngf6 (10...Qa7 11.c4=) 11.c4 Qa6 (11...Qa7 12.Nc3=) 12.a3 (12.Qc2 dc4 13.Bc4 b5+=) 12...Ne4 (12...Nb6 13.Ne5=) 13.Nbd2 (13.Qc2 b5 14.cb5 cb5+-) 13...Ndf6 (13...Bd6 14.Ne4 de4 15.Nd2+=) 14.Ne5 (14.Ne4 Ne4 15.Bd3 Nd6+=) 14...Nd2 (14...Bd6 15.Ne4 Ne4 16.f3+=) 15.Qd2+/– Ne4 16.Qc2 Qa7 17.a4 (17.Bd3 f5+/–) 17...Bd6 (17...Bb4!?+=) 18.f3 Ng5 19.Bc3 Be5 20.Ba5 Bh2 21.Kh2 Qa5 22.Rab1 Qc7 23.Kh1 0-0 24.Bd3 f5 25.Qc3 b6 26.f4 Nf7 27.Qb4 g5? 28.Qb6 Qb6 29.Rb6 Bd7 30.cd5 cd5 31.Rc1 Ra8 32.Rc7 Rd8 33.a5 g4 34.a6 1–0. Benussi,Alberto – Loewe,Peter, CiF CP1–95–0213A, 1995.

4.Nf3 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.b5 Nbd7).

5.e3 b6 6.Be2 h6 (6...a6 7.Nf3=) 7.Nf3 Bd6 8.c4 (8.Nd4 Bb7=) 8...Nc5 (8...0-0 9.cd5 Nd5 10.a5=) 9.d4 Nce4 10.Ba3 (10.0-0 a6+=) 10...0-0 11.cd5 Ng4 (11...ed5 12.a5=) 12.0-0+= ed5 13.Bd6 Qd6 14.Nfd2?? (better is 14.a5+=) 14…Qh2 0–1. yannigator (1920) – fullblass (1735), net–chess.com, 2009.

5.e3 Bd6 6.Nf3 =+.

5.e3 Be7 6.d4 0-0 7.c4 c5 8.Nf3 cd4 9.Bd4 dc4 10.Bc4 Bb4 11.Bc3 Bc3 12.Nc3 Nb6 (12...Qc7 13.Qb3=) 13.Qd8+= Rd8 14.Ke2?? (better is 14.Be2+=) 14...Nc4-+ 15.Rhd1 Bd7 16.Rd4 (16.e4 e5-+) 16...Nb6 17.a5 Nbd5 18.Nd5 Bb5 19.Ke1 Nd5 20.Rad1 a6 21.e4 Bc6 22.ed5 Bd5 23.Ne5 Rdc8 24.Nd7 Rc2 25.Nb6 Rb8 26.Nd5-/+ ed5 27.Rd5 h6 28.Rd8 Rd8 29.Rd8 Kh7 30.Rd7 Rc1 31.Kd2 Ra1 32.Rb7 f6 33.Ra7 Ra5 34.Ke3 Ra1 35.Kf3 a5 36.Kg3 a4-+ 37.f3 a3 38.h4 h5 39.Ra5 Kh6 40.Ra8 f5?? 41.Ra6 g6-/+ 42.Ra8 a2 43.Rh8 Kg7 44.Ra8 Kf6 45.Ra6?? Ke5-+ 46.Ra5 Kd4 47.Kf4 Kc4 48.Kg5 Kb4?? 49.Ra8=+ Kb3 50.Kg6? Rg1 51.Kf5 Rg2 52.f4 Kb2 53.Kf6 a1Q 54.Ra1 Ka1 55.f5 Kb2 56.Ke7 Kc3 57.f6 Re2 58.Kd8 Kd4 59.f7 Ke5 60.f8Q+- Rd2 61.Kc7 Rd4 62.Qg7 Ke4 63.Qe7 Kf4 64.Qf7 Kg4 65.Qg6 Kh4 66.Qf6 Kg4 67.Qd4 Kh3 (67...Kh3 68.Qe3 Kg2 69.Qe2 Kg3 70.Qh5 Kf4 71.Kd6 Ke3 72.Ke5 Kd3 73.Qd1 Kc3 74.Qd4 Kc2 75.Qc4 Kb2 76.Kd4 Kb1 77.Kc3 Ka1 78.Qb5 Ka2 79.Qb2) 1–0. popovicigelu – olamikko, kurnik, 2011.

5.Nf3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Nbd7).

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

4.a3 Nf6 5.a4 Be7 6.e3 b6 7.c4 0-0 8.Nf3 Bb7 9.Be2 c6 10.0-0 cb5 11.cb5 Nbd7 (11...a6 12.Nc3=) 12.d4 (better 12.Ng5 Nc5 13.d4+-) 12...Nc5?? (better 12...Ne4=) 13.dc5+- Bc5 14.Nbd2 Bd6 15.Rc1 Rc8 16.Be5 Qd7 17.Rc8 Rc8 18.Nc4 (18.Bf6 gf6 19.Qa1 e5+-) 18...Bc5 (better 18...dc4 19.Bd6 Ne4+-) 19.Ba1?? (19.Bf6 gf6 20.a5 Qe7+-) 19...Ne4? (better 19...dc4 20.Bf6 Qd1 21.Rd1 Bf3 22.gf3 gf6 23.Bc4 Kf7 24.Rd7 Be7+=) 20.Nce5 Qe7 21.Nd4 Nd6 22.Ndc6 Bc6 23.Nc6 Qd7 24.Be5 Nf7 25.Qa1 Ne5 26.Qe5 Bd6 27.Qd4 Bc5 28.Qh4 Qf7 (28...a6 29.Rc1+-) 29.Rd1 Re8 30.Bf3 Qf6 (30...Be7 31.Qg3+-) 31.Qf6 gf6 32.Nd4 (better 32.Na7 Ra8 33.Nc6+-) 32...Kf7?? (32...Bd4 33.Rd4 Rc8 34.h3+-) 33.g3 (better 33.Bh5 Kf8 34.Be8 Bd4 35.Bd7+-) 33...Kg6 34.Ne2 e5? (34...Rc8+-) 35.Bd5 e4 (35...Re7+-) 36.Nf4 Kg5 37.Kg2 h5 38.h4 Kh6 39.Bc4 Re7 40.Rd8 Kg7 (40...Re5 41.Rh8 Kg7 42.Rh5+-) 41.Nh5 Kh6 42.Nf4 Rg7 43.Rh8 (43.Be6 Re7+-) 43...Rh7 44.Rh7 Kh7 45.Be6 Kg7 46.Bf5 Kf7 47.Be4 Ke7 (47...Bb4 48.Bd5 Kg7 49.Ne6 Kh6 50.g4+-) 48.Bd5 (48.h5 Ke8+-) 48...Kd6 (48...f5 49.Bc4 Kf6 50.Nd5 Ke5 51.f4 Ke6 52.Nb6 Kd6 53.Nd5+-) 49.Kf3 Ke5 (49...f5 50.h5 Bb4 51.h6+-) 50.e4 (better 50.h5 Kf5+-) 50...Bb4 (50...f5 51.ef5 Kf5 52.g4 Ke5 53.g5+-) 51.Ng6 (better 51.Nd3 Kd6 52.Nb4 f5+-) 51...Kd4 52.h5 f5 (52...Bd2 53.Kg4 Bh6 54.Kf5+-) 53.h6 (better 53.e5 Kd5 54.h6 Kc4+-) 53...fe4 54.Be4 Bc3 55.h7 Kc5 56.h8Q Bh8 57.Nh8 Kb4 58.Bc2 (better 58.g4 Ka4 59.Bc6 Ka5+-) 58...Kc3 59.Bd1 (59.Bd1 Kd4 60.Nf7+-) 1–0. BeepBeepImAJeep (2570) – Svjatoslav (1935), lichess.org, 2017.

4.c4 a6 A) 5.Nc3 A1) 5...Nf6 6.e3 (6.cd5 ed5 7.e3 Be7 8.Nh3 ab5 9.Bb5 Nc6 10.0-0) 6...Be7 7.Nf3 0-0 8.d4 dc4 9.ba6 Ra6 10.Bc4; A2) 5...dc4 6.Qa4 (6.e3 ab5 7.Nb5 c6 8.Qh5 g6 9.Qd1 cb5 10.Bh8) 6...Nd7 7.Qc4 Nb6 8.Qb3 ab5 9.Nb5 Nd5 10.Nf3; A3) 5...ab5 6.cb5 (6.Nb5 dc4 7.e3 c6 8.Nd4 Qd5 9.Qc2 b5 10.Nge2) 6...Nf6 7.Nf3 Bd6 8.g3 Nbd7 9.Bg2 0-0 10.0-0; B) 5.Nf3 B1) 5...Nf6 6.cd5 (6.e3 ab5 7.cd5 ed5 8.Bb5 c6 9.Be2 Bd6 10.Bd4) 6...Nd5 7.e3 ab5 8.Ne5 Nf6 9.Bb5 c6 10.Be2; B2) 5...dc4 6.ba6 (6.Qa4 Nd7 7.Qc4 Nb6 8.Qb3 ab5 9.Qb5 c6 10.Qb3) 6...Na6 7.e3 Nc5 8.Bc4 Nf6 9.Nc3 Bd6 10.0-0; B3) 5...ab5 6.cd5 (6.cb5 Nf6 7.Nc3 Bd6 8.g3 Nbd7 9.Bg2 0-0 10.0-0) 6...ed5 7.Nc3 b4 8.Nb5 Nc6 9.Rc1 Nf6 10.Qb3; C) 5.e3 C1) 5...Nf6 6.Nc3 (6.cd5 ed5 7.Nc3 Be7 8.Nh3 ab5 9.Bb5 Nc6 10.0-0) 6...Be7 7.Nf3 0-0 8.d4 dc4 9.a4 f4 10.ef4; C2) 5...dc4 6.Nc3 (6.Bc4 ab5 7.Bb5 c6 8.Bc4 Nf6 9.Nf3 b5 10.Bb3) 6...ab5 7.Nb5 c6 8.Nd4 Qd5 9.Qh5 Kd8 10.Nh3; C3) 5...ab5 6.cb5 (6.cd5 ed5 7.Nc3 b4 8.Nb5 Na6 9.Nf3 Nf6 10.Be2) 6...Nf6 7.Nf3 Bd6 8.Nc3 0-0 9.d4 Nbd7 10.Bd3; D) 5.cd5 D1) 5...Nf6 6.de6 (6.Bf6 Qf6 7.Nc3 ab5 8.Nb5 Na6 9.Rc1 Be7 10.Nf3) 6...Be6 7.Nf3 ab5 8.Nd4 Bc4 9.d3 Bb4 10.Nd2; D2) 5...ed5 6.e3 (6.Na3 Nf6 7.Nf3 Be7 8.Qc2 0-0 9.Nd4 Qd7 10.Qa4) 6...Nf6 7.Nc3 Be7 8.Nh3 ab5 9.Bb5 Nc6 10.Nf4; D3) 5...ab5 6.e3 (6.de6 Be6 7.e3 b4 8.Ne2 Nf6 9.Nf4 Bf7 10.Qc2) 6...ed5 7.Bb5 c6 8.Bd3 Nf6 9.Nc3 Na6 10.Nf3.

4.c4 dc4 A) 5.e3 A1) 5...Nd7 6.Bc4 (6.Nf3 Nb6 7.a4 Nf6 8.Nc3 Be7 9.a5 Nbd5 10.Bc4) 6...Nb6 7.Bb3 Nf6 8.Nc3 Bb4 9.Nf3 0-0 10.0-0; A2) 5...a6 6.Bc4 (6.Nc3 ab5 7.Nb5 c6 8.Nd4 Qd5 9.Qh5 Kd8 10.Nh3) 6...ab5 7.Bb5 c6 8.Be2 Nf6 9.Nc3 Bd6 10.Nh3; A3) 5...Nf6 6.Bc4 (6.Nc3 Nbd7 7.Nf3 Nb6 8.a4 Bb4 9.a5 Nbd5 10.Bc4) 6...Nbd7 7.Nf3 Nb6 8.Bb3 Bd6 9.Nc3 0-0 10.Nd4; B) 5.Nf3 B1) 5...Nf6 6.Nc3 (6.e3 a6 7.ba6 Na6 8.Bc4 Bd6 9.Nc3 Nc5 10.Nb5) 6...Nbd7 7.e3 Nb6 8.a4 Bd6 9.a5 Nbd5 10.Bc4; B2) 5...Nd7 6.e3 (6.Nc3 Nc5 7.e3 Nd3 8.Bd3 cd3 9.0-0 Nf6 10.Qb3) 6...Ngf6 7.Bc4 Nb6 8.Bb3 Bb4 9.a3 Bd6 10.Nc3; B3) 5...a6 6.Qa4 (6.ba6 Na6 7.e3 b5 8.a4 Nc5 9.ab5 Ra1 10.Ba1) 6...Nd7 7.Qc4 Nb6 8.Qb3 ab5 9.Nd4 Kf7 10.Nb5; C) 5.Nc3 C1) 5...a6 6.e3 (6.Qa4 Nd7 7.Qc4 Ne5 8.Qa4 Bd7 9.Qb3 Nf6 10.e3) 6...ab5 7.Nb5 c6 8.Nd4 Qd5 9.Qh5 Kd8 10.Nh3; C2) 5...Nd7 6.Nf3 (6.e3 Ne5 7.Nf3 Nd3 8.Bd3 cd3 9.0-0 Nf6 10.Qb3) 6...Nc5 7.Ne5 Qd4 8.Nf3 Qd6 9.Ba3 Nf6 10.e3; C3) 5...Nf6 6.Nf3 (6.e3 Nbd7 7.Nf3 Bc5 8.Bc4 Nb6 9.Bb3 0-0 10.Qc2) 6...Nbd7 7.e3 Nb6 8.a4 Bd6 9.a5 Nbd5 10.Bc4; D) 5.Na3 D1) 5...a6 6.Qa4 (6.Nf3 ab5 7.Nb5 Nf6 8.Be5 Na6 9.a4 Ng4 10.Bd4) 6...Nd7 7.Qc4 Nb6 8.Qb3 Nf6 9.Nf3 Nbd5 10.ba6; D2) 5...Bd7 6.Nf3 (6.Nc4 Bb5 7.e3 Nf6 8.Nh3 Na6 9.a4 Bd7 10.Ne5) 6...Nf6 7.Nc4 Bb5 8.e3 Nc6 9.a4 Ba6 10.Nce5; D3) 5...Nf6 6.Nc4 (6.Nf3 Qd5 7.Qa4 Bd7 8.Qc4 a6 9.ba6 Na6 10.e3) 6...a6 7.a4 Bc5 8.Nf3 Ne4 9.e3 0-0 10.Be2.

4.c4 Nd7 A) 5.Nc3 A1) 5...dc4 6.Nf3 (6.e3 Ne5 7.Nf3 Nd3 8.Bd3 cd3 9.0-0 Nf6 10.Qb3) 6...Nc5 7.e3 Nd3 8.Bd3 cd3 9.0-0 Nf6 10.Qb3; A2) 5...Ne5 6.cd5 (6.e3 dc4 7.Nf3 Nd3 8.Bd3 cd3 9.0-0 Nf6 10.Qb3) 6...Nc4 7.Qb3 ed5 8.Bc1 Nf6 9.Nf3 Qd6 10.d3; A3) 5...Ngf6 6.cd5 (6.Nf3 Bd6 7.cd5 ed5 8.g3 0-0 9.Bg2 Nc5 10.0-0) 6...ed5 7.Nf3 Bd6 8.g3 0-0 9.Bg2 Nc5 10.0-0; B) 5.cd5 B1) 5...Nb6 6.de6 (6.Nf3 Nd5 7.Nc3 Ngf6 8.Qb3 Bd6 9.Nd4 Be5 10.Nf3) 6...Nc4 7.Bc3 Be6 8.d3 Nd6 9.Nh3 Nb5 10.Nf4; B2) 5...Nc5 6.Nf3 (6.Nc3 ed5 7.d4 Ne4 8.Nf3 Ngf6 9.Ne5 Bd6 10.f3) 6...ed5 7.Nc3 Nf6 8.d4 Nce4 9.Ne5 Bd6 10.f3; B3) 5...ed5 6.Nf3 (6.Nc3 Ngf6 7.Nf3 Be7 8.d4 0-0 9.e3 Nb6 10.Qc2) 6...Ngf6 7.Nc3 Be7 8.g3 0-0 9.Bg2 Nc5 10.0-0; C) 5.Qc2 C1) 5...dc4 6.e3 (6.Nf3 Nb6 7.e3 Nf6 8.a4 Bd6 9.Nc3 0-0 10.a5) 6...Ngf6 7.Nf3 Nb6 8.Bc4 a6 9.ba6 Nc4 10.ab7; C2) 5...Nb6 6.cd5 (6.e3 Nf6 7.Nf3 Be7 8.c5 Nbd7 9.d4 Ne4 10.Nc3) 6...Nd5 7.Nc3 Ngf6 8.Nf3 Bd6 9.e3 0-0 10.Bc4; C3) 5...Ngf6 6.Nf3 (6.cd5 ed5 7.Nf3 Bd6 8.Nc3 0-0 9.g3 Ne5 10.Bg2) 6...Bd6 7.cd5 ed5 8.Nc3 0-0 9.g3 Ne5 10.Bg2; D) 5.Nf3 D1) 5...dc4 6.e3 (6.Nc3 Nc5 7.e3 Nd3 8.Bd3 cd3 9.0-0 Nf6 10.Qb3) 6...Nb6 7.a4 Nf6 8.a5 Nbd5 9.Bc4 Bd6 10.Nc3; D2) 5...Nb6 6.c5 (6.cd5 Nd5 7.Nc3 Ngf6 8.Qb3 Bc5 9.Nd5 Qd5 10.e3) 6...Nc4 7.Bc3 Nf6 8.d3 d4 9.Bd4 e5 10.Bc3; D3) 5...Ngf6 6.cd5 (6.Nc3 Bd6 7.cd5 ed5 8.e3 0-0 9.Be2 Nb6 10.Nd4) 6...ed5 7.e3 Bd6 8.Nc3 0-0 9.Be2 Nc5 10.0-0.

4.c4 Ne7 A) 5.e3 A1) 5...Qd6 6.Nf3 (6.Qh5 Ng6 7.Nf3 Nd7 8.Nh4 Nde5 9.cd5 Qd5 10.f4) 6...Nd7 7.Ba3 c5 8.bc6 Qc6 9.Nc3 dc4 10.Nd4; A2) 5...Ng6 6.cd5 (6.Nf3 Nd7 7.cd5 ed5 8.h4 h5 9.Bd4 Nc5 10.Nc3) 6...Qd5 7.Nc3 Qd6 8.Nf3 Nd7 9.d4 Be7 10.h4; A3) 5...Nd7 6.Nf3 (6.Nc3 dc4 7.Nf3 Ng6 8.Bc4 Nde5 9.Qe2 Bd6 10.Ne5) 6...Nb6 7.c5 Nc4 8.Bc4 dc4 9.Qa4 Nd5 10.Qc4; B) 5.Nc3 B1) 5...a6 6.e3 (6.Nf3 dc4 7.ba6 Ra6 8.e3 Nbc6 9.Bc4 Rb6 10.Rb1) 6...ab5 7.cb5 Ng6 8.Nf3 Bd6 9.h4 Nd7 10.d4; B2) 5...dc4 6.Nf3 (6.e3 Nd7 7.Nf3 Ng6 8.Bc4 Nde5 9.Qa4 Nc4 10.Qc4) 6...a6 7.ba6 Na6 8.e3 Nc6 9.Bc4 Bb4 10.0-0; B3) 5...Nd7 6.Nf3 (6.e3 dc4 7.Nf3 Ng6 8.Bc4 Nde5 9.Qa4 Nc4 10.Qc4) 6...a6 7.e3 ab5 8.Nb5 Nc6 9.cd5 ed5 10.h4; C) 5.Na3 C1) 5...a6 6.e3 (6.Nf3 dc4 7.b6 Nd7 8.e3 Nb6 9.Nc4 Nc4 10.Bc4) 6...ab5 7.Nb5 c6 8.Nd4 Qb6 9.Bc3 c5 10.Nb5; C2) 5...Nd7 6.Nf3 (6.Qc2 Nf6 7.Nf3 Ng6 8.e3 Bb4 9.h4 Qd6 10.h5) 6...Ng6 7.e3 Nf6 8.h4 h5 9.cd5 ed5 10.Nc2; C3) 5...Ng6 6.e3 (6.Nf3 Nd7 7.cd5 ed5 8.Nc2 Nf6 9.Ncd4 Ne4 10.g3) 6...Be7 7.h4 Bf6 8.Bf6 Qf6 9.h5 Ne7 10.h6; D) 5.Nf3 D1) 5...Nd7 6.e3 (6.Nc3 dc4 7.e3 Ng6 8.Bc4 Nde5 9.Qb3 Nc4 10.Qc4) 6...Nb6 7.cd5 Ned5 8.Nc3 Nf6 9.Qb3 Be7 10.d4; D2) 5...dc4 6.e3 (6.Na3 a6 7.Qa4 Nd7 8.Bd4 Nd5 9.Nc4 Nc5 10.Bc5) 6...a6 7.Bc4 ab5 8.Bb5 c6 9.Be2 Qb6 10.Qc2; D3) 5...a6 6.e3 (6.Bd4 dc4 7.Qa4 c6 8.b6 Nd7 9.Qc4 Nd5 10.Nc3) 6...ab5 7.cb5 Nd7 8.Qc2 Ng6 9.Be2 Kf7 10.h4.

5.e3 c5 6.c4 Bd6 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 b6 10.cd5 ed5 11.d4 c4 12.Nc3 Bb7 13.Nd2 (13.Qc2 Ne4=) 13...Qe7 (13...Qc7 14.h3=+) 14.Bf3 (14.Qc2 Ne4=) 14...Ne4=+ 15.Nde4 (15.Qc2 Rf6 16.h3 Re6=) 15...fe4 16.Bg4 Nf6 17.Be2 Rae8 18.h3 Bc7 (18...Bb8!?-/+) 19.Ba3= Bd6 20.Bd6 Qd6 21.a5 Qb4 22.Qc2 Bc8 23.ab6 ab6 24.Ra7 Qd6 25.Qb2 g5 26.Qa3 Qa3 27.Ra3 g4 (27...h5 28.Bh5 Nh5 29.Nd5=) 28.h4 (better 28.hg4!? h6 29.Rfa1+-) 28...h5 29.g3 (better 29.Na4 Re6 30.Rfa1=) 29...Nd7?? (29...Kf7!?=+) 30.Rfa1?? (better 30.Nd5 c3 31.Rc3+-) 30...Bb7?? (better 30...Nf6=) 31.Ra7+- Rb8 32.Rb7! Rb7 33.Nd5 Nf6 (33...c3 34.Nc3 Nf6 35.Bc4 Kg7 36.Nd5+-) 34.Bc4 (34.Nf6 Rf6 35.Bc4 Kg7+-) 34...Kg7+- 35.Nf4 Rc7?? (better 35...Kh6+-) 36.Ne6+- Kh6 37.Nc7 Rc8 38.Nd5 (better 38.Ra7 Kg6+-) 38...Rc4 39.Nf6 Rb4 40.Ne4 Rb5 41.Nd6 Rd5 (41...Rb2 42.Kg2 Kg6 43.Nc4+-) 42.Nc4 b5 43.Ne5 b4 (43...Kg7 44.Ra6+-) 44.Rb1 Rb5 45.Kf1 b3 46.Ke2 1–0. BeepBeepImAJeep (2590) – InconnuFall (2060), lichess.org, 2017.

6.c4 0-0 7.Nf3 c5 8.Be2 Qe7 9.0-0 Nbd7 10.d4 b6 (10...cd4 11.ed4 dc4 12.a5+=) 11.Nbd2 (11.a5 ba5 12.Ra5 Bb7+=) 11...Bb7 12.Rc1 (12.a5 a6 13.dc5 Bc5 14.cd5 Nd5 (worse 14...Bd5 15.ba6 ba5 16.Ra5+-) 15.ba6 Ba6 16.ab6 Bb7=) 12...Rae8 (12...a6 13.dc5 Nc5 14.cd5 ab5 15.Bb5 Bd5 16.Nc4=) 13.cd5 (13.Ne5 Be5 14.de5 Ne4+=) 13...ed5 14.dc5 bc5 15.Nb3 c4 (15...Qd8 16.Bf6 Rf6 17.Qd2=) 16.Nbd4 (16.Na5 Ba8+=) 16...g6 (16...Ne4 17.Nc6 Bc6 18.bc6=) 17.Nd2 (17.Nc6 Bc6 18.bc6 Ne5=) 17...Nc5= 18.Bf3 (18.g3!?=) 18...Nfe4 (18...Nd3!? 19.Qc2 Nc1 20.Rc1 f4 21.ef4 Bf4-+) 19.Ne4 fe4 (19...Ne4?! 20.a5+=) 20.Be2 Be5 (20...Nd3!? 21.Bd3 Qe5=+) 21.Ba3= Bd6 22.Bc5 (22.Bb2 Nd3 23.Bd3 Qe5=+) 22...Bc5=+ 23.f4?? (better 23.a5=+) 23...ef3-+ 24.Rf3 (24.Bf3 Qe3 25.Kh1 Qd4-+) 24...Rf3 25.Bf3 Qe3 26.Kh1 Qd4 27.Qd4 Bd4 28.Rd1 (28.g3 Kf7-+) 28...c3 29.g3 (29.Rc1 c2 30.h3 Rc8-+) 29...Re3 (29...c2!? 30.Rc1 Rc8 31.Bg4-+) 30.Kg2 c2 31.Rc1 Rc3 32.Bd1 cd1Q 33.Rd1 Be5 (better 33...Rc2 34.Kf1 Be3 35.Ke1-+) 34.Kh3 (34.Kf1-+) 34...d4 (better 34...Rc2!? 35.Kg4 Kg7 36.Rf1 h5 37.Kg5-+) 35.Re1 Bf6 (35...Re3 36.Rf1 d3 37.Rc1 Re2 38.Kg4 Rf2 39.Rc6 Bc6 40.bc6 d2 41.h4 d1Q 42.Kh3 Qd3 43.c7 Qg3) 36.Rf1 Kg7 37.Re1 (37.Rf2 h5 38.Ra2 g5 39.b6 g4) 37...h5 (37...Rc2 38.Rf1 Bg2 39.Kg4 h5 40.Kf4 Re2 41.g4 g5 42.Kf5 Re5) 38.Rd1 g5 39.Rd4 g4 (39...Rc2 40.Rd7 Kg6 41.Rg7 Bg7 42.b6 Bg2) 40.Rg4 hg4 41.Kg4 Bc8 (41...Rc4 42.Kh3 Ra4 43.b6 ab6 44.g4 Ra3) 42.Kf4-+ Kg6 (better 42...Rc4 43.Ke3 Ra4-+) 43.g4 Bg5 (43...Bb7 44.g5 Bg7 45.Kg4 Be5 46.Kh4 Bg2 47.b6 Rc4) 44.Ke4 (44.Ke5 Bb7 45.h4 Bh4 46.g5 Rd3 47.Ke6 Bc8 48.Ke5 Bg3 49.Ke4 Bf5) 44...Bg4 (44...Bb7 45.Ke5 Rd3 46.Ke6 Bf6 47.b6 Bc8) 45.Kd5 Bf5 (45...Bf3 46.Kd6 Kf6 47.h3 Bf4 48.Kd7 Rd3 49.Kc8 Ke7 50.b6 Rd8) 46.Kd6 Bf4 (46...Kf6 47.h4 Be3 48.h5 Be6 49.b6 Bf4) 47.Kd5 (47.Ke7 Re3 48.Kd8 Kf7 49.b6 Rd3) 47...Bh2 (47...Kf6 48.Kd4 Be5 49.Kd5 Bg4 50.b6 Bf3) 48.Kd4-+ Bf4 (better 48...Ra3-+) 49.Kc3 1–0. BeepBeepImAJeep (2605) – probeta (2225), lichess.org, 2016.

6.c4 0-0 7.Nf3 c6 8.Be2 a6 9.0-0 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.d4 Qe7 13.Nc3 Ne4 (13...dc4 14.bc6 bc6 15.Bc4=) 14.Qc2 h6 15.Nd2 (15.Rc1 Ng5+=) 15...Ndf6 16.f3 (16.c5 Bb8+=) 16...Nd2= 17.Qd2 e5 18.cd5 (better 18.c5 Bb8 19.Na4+=) 18...cd5 (better 18...ed4 19.Qd4 Bc5=) 19.Nd5!+- Nd5 20.de5 Ne3 21.Qe3 (21.ed6 Qe6 22.Rc1 f4+-) 21...Bc5+- 22.Bd4 Bb4 23.Bc4 Be6 24.Qd3 (24.Be6 Qe6 25.Rb1 Ba5+-) 24...Rd8 25.Qb3 Rd4 26.Be6 Kh7 (better 26...Kh8!? 27.Kh1 f4+-) 27.Bf5+- g6 28.Be4 (28.Bd3 Kg7 29.f4 Bd2+-) 28...Bc5 (28...Kg7 29.e6+-) 29.Kh1 Qe5 (29...Kg7 30.e6+-) 30.Qf7 (worse 30.Bb7 Kg7 31.Qc3 Bb6+-) 30...Qg7 31.Bg6 Kh8 32.Qe8 Qf8 (32...Bf8 33.Be4 Rd2 34.f4+-) 33.Qf8 (better 33.Qe5 Kg8 34.Be4 Qd6 35.Qd6 Bd6 36.Bb7 Rh4+-) 33...Bf8 34.Be4 Rb4 35.Bb7 (35.Rb1 Rb1 36.Bb1 Kg7+-) 35...Rb5 36.Be4 Rb2 37.Rb1 Rb1 38.Bb1 Kg7 39.g3 Kf6 40.Kg2 Bd6 41.Kh3 Kg5 42.f4 Kf6 43.Kg4 Bc5 44.h4 Bf2 45.Be4 Be1 46.Kf3 h5 (46...Ke7 47.h5+-) 47.Bc6 Kg6 (47...Kf7 48.Kg2+-) 48.Be8 Kh6 49.Kg2 Bd2 50.Kf2 Bc3 51.Kf3 (51.f5 Bf6+-) 51...Be1 52.f5 Bc3 53.Kf4 (53.Bg6 Be5+-) 53...Bf6? (better 53...Bd2!? 54.Ke4 Be1+-) 54.g4 (54.Ke4!? Bc3 55.Bf7 Bb4+-) 54...hg4 55.Kg4 Be7 56.h5 Bf6 57.Bg6 (57.Kf4 Bg7+-) 57...Kg7 (57...Bg5 58.Kf3+-) 58.Kf4 Bc3 59.Ke4 Bb2 60.Kd5 Bc3 61.Ke6 Bb2 (61...Bd4 62.Bf7+-) 62.Ke7 Bc3 (62...Ba3 63.Kd8+-) 63.Kd7 (63.Be8 Bf6 64.Ke6 Bd4+-) 63...Bb2 64.Kd6 1–0. BeepBeepImAJeep (2725) – clubamigos (2440), lichess.org, 2016.

6.c4 0-0 7.Nf3 c6 8.Be2 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 Nbd7 12.d4 Ne4 13.0-0 h6 (13...dc4 14.bc6 Nb6 15.Ne5+=) 14.Rd1 Qe7 15.bc6 bc6 16.cd5 (16.c5 Bc7+-) 16...cd5 (16...ed5 17.Qa4 Qe6 18.Rc1+=) 17.Nb5+= Bb8? (better 17...Bb4+=) 18.Ba3+- Nd6 (18...Qf6 19.Bf8 Qf8 20.Qa8+-) 19.Ne5 Rd8 (19...Nf6+-) 20.Nc6 (20.Nc6 Qf8 21.Nd8 Qd8 22.Bd6 Bd6 23.Nd6+-) 1–0. BeepBeepImAJeep (2670) – clubamigos (2305), lichess.org, 2016.

6.c4 0-0 7.Nf3 c6 8.Be2 Nbd7 9.d4 Ne4 10.0-0 Qe7 11.Ne5 g6 (better 11...Ne5!? 12.de5 Bb4=) 12.bc6+- bc6 13.Nc6 Qg7 14.cd5 ed5 15.Nc3 Ndf6 (better 15...Bb7 16.Na5 Nc3 17.Bc3 Rab8+-) 16.Qb3?? (16.Nb5 Bd7 17.Ne5 Bb4+-) 16...Be6 (16...Nd2 17.Qa2 Qh6 18.h3 Nf1 19.Bf1+=) 17.Ne5 (17.Ba3 Ba3 18.Qa3 f4+-) 17...Rab8 (17...Nd2 18.Qa2 Nf1 19.Rf1=) 18.Qc2 (18.Qa2!?+-) 18...Rfc8= 19.Rac1?? (19.Bb5 Nc3 20.Bc3-/+) 19...Bb4?? (better 19...Nc3 20.Ba6 Rc7 21.Bc3 Ne4-+) 20.Qd3+- Bc3 21.Bc3 Nc3 (21...Ng4 22.Bg4 fg4 23.Ba5+-) 22.Rc3+- Qb7 23.Rfc1 (23.Rfc1 Ne4 24.Rc6+-) 1–0. BeepBeepImAJeep (2515) – Nf5andwins (1945), lichess.org, 2017.

6.c4 Nbd7 7.Nf3 0-0 8.Be2 Qe8 9.d4 Ne4 10.0-0 c6 11.Ne5 Ne5 12.de5 Bc5 13.Nd2 Qg6 14.Nb3 Bb4 15.Rc1 f4 16.bc6 (16.ef4 Rf4 17.Qd3 Bd7+=) 16...bc6 17.ef4 Rf4 18.cd5 ed5 19.Nd4 Bc5 20.Bf3 Bf5?? (better 20...Bg4 21.Bg4 Rg4=+) 21.Nf5+- Nf2 (21...Qf5 22.Be4 Qe4 23.Rc5 Rg4+-) 22.Rc5 (22.Rf2?! Bf2 23.Kf2 Rf5+-) 22...Qf5 (22...Nh3 23.Kh1 Qf5 24.Rc6 d4+-) 23.Rf2 Kh8 24.Rc6 Rf8 25.e6 (25.e6 Rg8 26.g3+-) 1–0. BeepBeepImAJeep (2570) – Kingscrusher_YouTube (2275), lichess.org, 2017.

6.c4 Qe7 7.Nf3 c6 8.Be2 a6 9.0-0 ab5 10.ab5 Ra1 11.Ba1 0-0 12.d4 Nbd7 13.c5 Bc7 14.Nc3 Ne4 15.Qa4 cb5 16.Nb5 Bb8 17.Bb2 h6 18.Ba3 White terminates the opponent with strong threats 18...Qf7 19.Na7?? (19.Rc1 Re8+-) 19...Re8?? (better 19...Nc3 20.Qc2 Ne2 21.Qe2 Ba7-+) 20.Nc8 Rc8 21.Rb1?? (21.Qb3 Rc7+-) 21...Ndf6?? (better 21...Nc3 22.Qc2 Nb1 23.Qb1 Nf6-/+) 22.Qb4+- Rc7 (22...Bc7!?+-) 23.Ne5+- g5?? (better 23...Qe8 24.c6! Ng4+-) 24.Nf7 (24.Nf7 Rf7 25.f3+-) 1–0. BeepBeepImAJeep (2745) – clubamigos (2390), lichess.org, 2020.

5.Qc2 A) 5...Nbd7 6.Nf3 (6.cd5 Nd5 7.Nf3 a6 8.Nc3 Nc3 9.Bc3 ab5 10.Nd4) 6...Bd6 7.d4 dc4 8.Nbd2 Nb6 9.e3 0-0 10.Nc4; B) 5...Bd6 6.cd5 (6.Nf3 Nbd7 7.cd5 ed5 8.Nc3 0-0 9.g3 Ne5 10.Bg2) 6...ed5 7.Nf3 0-0 8.Nc3 Nbd7 9.g3 Ne5 10.Bg2; C) 5...a6 6.Nf3 (6.cd5 Nd5 7.Nc3 Nc3 8.Bc3 ab5 9.Qb2 Nc6 10.e3) 6...dc4 7.Nc3 c6 8.b6 Nbd7 9.Na4 Bd6 10.e3.

5.Nc3 A) 5...dc4 6.Nf3 (6.e3 Nbd7 7.Nf3 Nb6 8.a4 Bc5 9.a5 Nbd5 10.Bc4) 6...Nbd7 7.e3 Nb6 8.a4 Bd6 9.a5 Nbd5 10.Bc4; B) 5...Bd6 6.Qb3 (6.cd5 ed5 7.g3 Nbd7 8.Bg2 Nb6 9.Qb3 c6 10.d3) 6...d4 7.Na4 c5 8.Nf3 a6 9.Ba3 ab5 10.cb5; C) 5...Nbd7 6.cd5 (6.Nf3 Bd6 7.cd5 ed5 8.e3 0-0 9.Be2 Nc5 10.0-0) 6...ed5 7.Nf3 Bd6 8.e3 0-0 9.Be2 Nc5 10.0-0.

5.cd5 ed5 (5...Bd6 6.de6 (6.Nc3 ed5 7.g3 d4 8.Na4 c6 9.Bd4 cb5 10.Nc3) 6...Be6 7.Nf3 0-0 8.Nd4 Qe7 9.Ne6 Qe6 10.Qb3; 5...Nd5 6.e3 (6.Nc3 a6 7.e4 Nc3 8.Bc3 fe4 9.Qh5 g6 10.Qe5) 6...Nd7 7.Nc3 N7f6 8.Nf3 Be7 9.Nd5 ed5 10.Bd3) 6.Nf3 (6.Nc3 d4 7.Nb1 a6 8.Qa4 Nbd7 9.Nf3 Nc5 10.Qc2) 6...c6 (6...Bd6 7.e3= (7.Nc3 Nbd7 8.e3 0-0 9.Be2 Nc5 10.0-0) 7...0-0 8.Nc3 Nbd7 9.Be2 Nc5 10.0-0; 6...Be7 7.Nc3 0-0 8.h4 Nbd7 9.h5 h6 10.e3) 7.e3 Bd6 8.Nc3 0-0 9.a4 (9.Be2 a6 10.a4= (10.bc6 Nc6=); 9.Rc1 Re8 10.Be2) 9...Qe7 (9...Qc7 10.Rc1) 10.Be2 Ne4 11.0-0 Nd7 (11...Be6 12.Rc1=) 12.d4 Rf6 (12...f4 13.ef4 Rf4 14.Re1=) 13.Qc2 Rh6 14.h3 g5 (14...a6 15.Rfc1=) 15.bc6 bc6 16.Ne4 fe4 17.Nh2 (17.Nd2 Rb8=) 17...Nf8 (17...Nf6 18.Rfc1= (18.Qc6? Bh2 19.Kh1 Bb7-+)) 18.Ng4+= Bg4 19.Bg4 (worse is 19.hg4 Bh2 20.Kh1 Qd6 21.g3 Bg3 22.Kg1 Rh1 23.Kg2 Rh2 24.Kg1 Bf2 25.Rf2 Qg3 26.Kf1 Qf2) 19...Bc7 (19...Rb8!?+=) 20.Ba3+/– Qf6 (20...Qd8 21.f3 ef3 22.Rf3+/–) 21.f3 ef3 22.Rf3 Qg7 23.Raf1 Bd6 24.Bd6 Rd6 25.Qf2 Ng6 (better is 25...Qh6+-) 26.Rf7 Qh6 27.Qg3 (better is 27.Rf6 Rdd8 28.Qf5+-) 27...Nf4?? (better is 27...Nf8+-) 28.ef4 gf4 29.R1f4 Re8 (29...Qg6+-) 30.Be6 Kh8 31.Rh4 Qc1 32.Kh2 h6 (32...Qh1 33.Kh1 Rde6 34.Rhh7) 33.Qg7 1–0. pierre – jenny, internet, 2011.

5.e3 A) 5...Bd6 6.Nc3 (6.cd5 0-0 7.de6 Be6 8.Nf3 Nbd7 9.Nd4 Qe7 10.Nc3) 6...0-0 7.cd5 ed5 8.Be2 Nbd7 9.Nf3 Nc5 10.0-0; B) 5...Nbd7 6.Nc3 (6.Nf3 Bd6 7.cd5 ed5 8.Nc3 0-0 9.Be2 Nc5 10.0-0) 6...Be7 7.Nf3 0-0 8.Be2 dc4 9.Bc4 Nb6 10.Be2; C) 5...Be7 6.Nf3 (6.Nc3 0-0 7.Nf3 a6 8.d4 Ne4 9.cd5 ab5 10.Bb5) 6...0-0 7.Nc3 a6 8.a4 ab5 9.ab5 Ra1 10.Qa1; D) 5...a6= 6.Nc3 (6.cd5 Nd5 7.Qh5 g6 8.Qh3 Nf6 9.Nf3 ab5 10.Bb5) 6...ab5 7.Nb5 c6 8.Bf6 gf6 9.Qh5 Ke7 10.Nd4.

5.Nf3 A) 5...Bd6 6.cd5 (6.Nc3 Nbd7 7.cd5 ed5 8.e3 0-0 9.Be2 Nc5 10.0-0) 6...ed5 7.Nc3 Nbd7 8.e3 0-0 9.Be2 Nc5 10.0-0; B) 5...Be7 6.e3 (6.Nc3 0-0 7.e3 a6 8.d4 ab5 9.cb5 c5 10.Be2) 6...0-0 7.Nc3 a6 8.d4 Ne4 9.a4 f4 10.ef4; C) 5...Nbd7 6.cd5 (6.Nc3 Bd6 7.cd5 ed5 8.e3 0-0 9.Be2 Nc5 10.0-0) 6...ed5 7.Nc3 Bd6 8.e3 0-0 9.Be2 Nc5 10.0-0.

4.e3 (--> 3.e3 f5 4.b5).

4.e3 Nf6 5.c4 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3).

4.e3 Nf6 5.Nf3 Bd6 (--> 3.e3 f5 4.Nf3 Nf6 5.b5 Bd6).

4.a4 Bc5 5.e3 Bd6 6.c4 c5 (6...dc4 7.Bc4 a6 8.Nc3=) 7.Nf3 (7.cd5 e5+=) 7...d4 (7...Ne7 8.Nc3=) 8.Be2 (8.ed4 cd4 9.Bd4+-) 8...d3? (better 8...e5=) 9.Bd3+- e5 10.Be2 (10.Qc2 g6+-) 10...e4 11.Ng1 f5?? (11...Bf5 12.d4+-) 12.d3 (better 12.Bg7 Qg5 13.Bh8 Qg2 14.Bh5 Kd8 15.Bf3 ef3 16.Qf3+-) 12...g6?? (better 12...Nf6+-) 13.Bh8+- Nf6 14.Bf6 (14.de4 fe4 15.Nc3 Bc7 16.Bf6 Qf6 17.Ne4 Qe5+-) 14...Qf6 15.Nd2 (15.Ra2 Nd7+-) 15...Nd7 Black prepares f4 (15...ed3 16.Bd3 Nd7 17.Ra3+-) 16.de4 Ne5 (16...f4 17.ef4 Bf4 18.Ra3+-) 17.Ngf3 (17.f4!? Nf7+-) 17...Be6 18.ef5 gf5 (18...Bf5 19.0-0+-) 19.0-0 f4 (19...0-0-0 20.Qb3+-) 20.Ne5 (better 20.Ne4 Qe7 21.Qd6 Nf3 22.Bf3 Qd6 23.Nd6 Ke7 24.Nb7 Bc4 25.Rfe1+-) 20...Be5 21.Ne4 (better 21.Bh5!? Kf8 22.Ra2 Rd8+-) 21...Qh4 22.Nd6 (22.Bh5!? Ke7 23.Qf3 Rc8+-) 22...Ke7 23.Ne4 (23.g3 Rg8 24.Qd5 Qh2 25.Kh2 fg3 26.fg3 Bg3 27.Kg1 Bf4 28.Qg2 Be3 29.Kh1 Rg2 30.Kg2 Kd6 31.Rad1 Bd4+-) 23...fe3?? (23...f3 24.Ng3 fe2 25.Qe2 Ba1 26.Ra1 Rd8+-) 24.Ng3 (better 24.f4 Bf4 25.g3 Rg8+-) 24...Bg3 (24...ef2 25.Rf2 Bd4+-) 25.hg3 (better 25.fg3 Qd4 26.Qc2+-) 25...Qh5 (25...ef2 26.Rf2 Qg3 27.Qe1+-) 26.Ra3 (better 26.Bh5 Rf8 27.Qe1 ef2 28.Rf2 Rf5 29.Rf5 Kd6 30.Qe5 Kd7 31.Rd1 Bd5 32.Qd5 Ke7 33.Qd6) 26...Qh6 (26...ef2 27.Rf2 Qg5 28.Bf3+-) 27.Re3 Rg8 (27...Rd8 28.Qb1 Rd4+-) 28.Bg4 Qg7 29.Re6 Kf7 (29...Kf8 30.Qd8 Kf7 31.Qe7) 30.Qd7 Kf8 31.Re8 1–0. BeepBeepImAJeep (2575) – anscariusbarcino (1680), lichess.org, 2016.

4.a4 Bd6 5.e3 Ne7 6.c4 (6.Qh5 Kd7=) 6...0-0 7.Nf3 c6 (7...a6 8.d4 c5 9.dc5 Bc5 10.Qc2=) 8.Be2 dc4 9.Bc4 Nd5 10.0-0 f5 (10...Nb6 11.Bb3=) 11.d4 Nf6 (11...a6 12.Nc3+=) 12.Ne5 Be5 13.de5 Nd5 14.Nc3 Qg5 15.Ne2 Nd7 16.Ba3 (16.a5 Rd8+-) 16...Rf7 (16...Rd8 17.Bd5 Nb6 18.bc6 Nd5 19.Qc2 bc6 20.Rfd1+=) 17.Qb3 f4 (17...N7b6 18.bc6 bc6 19.Bd3+=) 18.Bd5 (better 18.ef4 Qg4 19.a5+-) 18...f3?? (better 18...cd5 19.ef4 Qg4+-) 19.Bf3!+- Rf3 (19...Ne5 20.Be4 Qh4 21.f3+-) 20.Qe6 Rf7 21.Qe8 Rf8 (21...Nf8 22.e6 (22.bc6?! Bh3 23.Qf7 Kf7=) 22...Be6 23.Qa8+-) 22.Bf8 Nf8 23.Nf4 (23.bc6 Bh3 24.Qf8 Rf8-+) 23...Bh3 (23...Qh6 24.e6! g5 25.Qf7 Kh8+-) 24.Qa8 Bf5 25.e4 (25.Qb7 Bg4+-) 25...Be4 (25...Qf4 26.ef5 Qe5 27.Qb7+-) 26.Qf8! Kf8 27.Ne6 Kf7 28.Ng5 Kg6 29.Ne4 (29.Ne4 Kf5 30.f4+-) 1–0. BeepBeepImAJeep (2465) – CarlosAttack (2070), lichess.org, 2017.

4.a4 e5 5.e3 c5 6.c4 d4 7.d3 b6?? 8.Nf3?? (better 8.Qh5 g6 9.Qf3+-) 8...Bd6 9.Be2 a6 10.0-0 ab5 11.ab5 Ra1 12.Ba1 Ne7 13.Bb2 0-0 14.Ba3 Nd7 (14...f5 15.ed4 ed4 16.Re1=) 15.ed4+= ed4 16.Nd4 Bh2 17.Kh2 Nb8?? (better 17...cd4 18.Re1 Re8+=) 18.Nf3 Bb7 (18...Nf5 19.Re1+-) 19.d4 cd4 (19...Qc7 20.Kg1+-) 20.Qd4 Qc7 21.Kg1 (21.Bd6 Qd8 22.c5 Nf5 23.Qc4 Rf7+-) 21...Nf5 (21...Rd8 22.Qe3 Ng6 23.Rd1+-) 22.Qg4 Nd6 (22...Ne7 23.Qe6 Rf7 24.Re1+-) 23.Qe6 Nf7 24.Bf8 Kf8 25.Nd4 Nd7 26.Bf3 (26.Qf6 Nf6 27.Ne6 Ke7 28.Nc7 Ng5+-) 26...Nc5 (26...Bf3 27.Nf3 Nc5 28.Qc6+-) 27.Qh3 (27.Re1 Ne5 28.Bb7 Nb7+-) 27...Bc8 (27...Ng5 28.Qg4+-) 28.Qh7 Ng5 (28...Ne6 29.Nf5+-) 29.Qh8 Kf7 30.Bd5 Kg6 (30...Nce6 31.Nf5 Kg6 32.g4 Nh3 33.Kh1+-) 31.Qe8 Kh6 32.Nd2 (better 32.f4!? Bg4 33.fg5 Kg5 34.Qe3 Kg6+-) 32...Bg4 33.N2f3 (better 33.Qh8 Nh7 34.Bg8+-) 33...Bh5 (33...Qc8 34.Qe3 Bf3 35.Nf3+-) 34.Qc6 (34.Nf5 Kh7 35.Qh5) 34...Qf4 (34...Nf3 35.Bf3 Qf4 36.Bh5 Qd4 37.Bf7+-) 35.Ng5 (better 35.Qb6 Bf3 36.Qc5 Qe5+-) 35...Qg5 (35...Qd4 36.Nf7 Bf7 37.Bf7+-) 36.Qb6 Nd3 37.Ne6 Qh4 38.Ng7 (38.Qb8 Ne5 39.Qh8 Kg6 40.f4 Nf3 41.Bf3 Bf3 42.f5 (42.gf3?! Qh8 43.Re1 Qa8+-) 42...Kf5 43.Rf3 Ke5 44.Qb8 Ke6 45.Qe8 Kd6 46.Qc6 Ke7 47.Re3 Qe4 48.Re4 Kd8 49.Re8) 38...Be2 (38...Kg7 39.Qa7 Kg6+-) 39.Nf5 Kg5 40.Nh4 Bf1 (40...Bh5 41.g3 Bf7 42.Qe3 Kg4 43.Qd3 Kg5 44.Qd2 Kg4 45.f3 Kg3 46.Qh2) 41.Kf1 (41.Qe3 Nf4 42.Qg3 Kh5 43.Qf4 Bc4 44.Bf3) 41...Kh4 (41...Ne5 42.Qe3 Kh4 43.Qh6 Kg4 44.c5 Nf3 45.Qg6 Kh4 46.Bf3 f5 47.Qf6) 42.Qf6 (42.Qf6 Kg4 43.Bf3) 1–0. RichardSommer (2075) – Cholito20 (2070), lichess.org, 2020.

4.d4 Bd6 5.g3 Ne7=+ 6.f4 (6.c4 dc4 7.e4 f5=+) 6...Bd7 7.a4 a6 8.Nc3 ab5 9.Nb5 Bb5 (9...Nf5 10.Qd2-/+) 10.ab5=+ Ra1 11.Qa1 b6 (11...0-0 12.Bg2=+) 12.Qa8 0-0 13.Bh3 Qd7 14.Qa4 f5 15.e3 c6 16.bc6 Nbc6 17.g4 (17.Bf1 Qb7=+) 17...g6 (17...b5 18.Qa2-/+ (18.Qb5?? Rb8 19.Qa4 Rb2-+)) 18.c4 (18.Qb5 Ra8=+) 18...dc4 (better 18...Bb4!? 19.Kf2 dc4-+) 19.Qc4=+ Rc8 20.gf5 Na5 21.Qe2 (21.Qa2!? gf5 22.Ne2=+) 21...ef5-/+ 22.e4 Bb4 (better 22...Nd5 23.Qf3 Nf4-+) 23.Kf2? (23.Kf1 Nc4 24.Nf3 Nb2 25.Qb2 Qa4-+) 23...Nc4?? (better 23...Qa4 24.Qf3 Qc2 25.Ne2 Qb2 26.ef5 Rc2-+ (worse 26...Nf5 27.Bf5 Re8 28.Be4=; 26...gf5?! 27.Bf5 Rc6 28.Rg1 Kf8 29.Bh7-/+)) 24.Ba1 (better 24.ef5 Nf5 25.Nf3=+) 24...Qe6 (24...Bd2!?-/+) 25.Nf3 (25.ef5 Qe2 26.Ne2 gf5=) 25...Qe4 (better 25...Nd6!? 26.e5 Ne4 27.Qe4 Qa2 (27...fe4?? 28.Be6 Kg7 29.Bc8+-) 28.Qe2 Rc2 29.Qc2 Qc2 30.Kg3 Nd5-+) 26.Qe4+= fe4 27.Bc8 ef3?? (better 27...Nc8 28.Ne5 N8d6+=) 28.Be6+- Kf8 29.Bc4 Nf5 30.Kf3 Ke8 31.Be6 1-0. oo313oo - kerekeza26 (1650), Rated Classical game, lichess.org, 2013.

4.e3 b6 5.Bd3 a6 6.Qh5 Kd7 7.Bh7 Bd6 8.Qf7 Qe7 9.Bg8 Qf7 10.Bf7 Ke7 11.Bg6 e5 12.Nc3 Be6 13.h3 f5 14.h4 Nd7 15.h5 e4 16.ba6 Ra6 17.Nh3 Nf8 18.Nb5 Ng6 19.hg6 Rh6 20.Bg7 Rg6 21.Nd6 Rg7 22.Nb5 Rg2 23.Nc7 Ra7 24.Ne6 Ke6 25.Nf4 1–0. Bonetti,Shane – Rookee, ICC, 2002.

4.e3 Bc5 5.c4 dc4 6.Qh5 Kf8 7.Qc5 1–0. Rosner, Dirk – Salewski, Bernd, DDR–ch I723 corr, 1988.

4.e3 Nd7 5.c4 dc4 6.Bc4 Nb6 7.Be2 Bd6 8.Nc3 Ne7 9.Nf3 Ned5 10.0-0 Nc3 11.dc3 e5 12.a4 Qe7 13.a5 Nd7 14.e4 Nc5 15.Nd2 Be6 16.Qc2 0-0 17.Bc4 Bc4 18.Nc4 Qd7 19.Nd6 cd6 (worse is 19...Qd6 20.Ba3+/–) 20.c4 f5 21.ef5 Rf5 22.Rad1 e4 23.Rd4 a6 24.Ba3 (24.Qd1 Qf7=) 24...ab5 25.cb5 Qb5 26.Bc5 dc5 27.Re4 Rf7 28.Rfe1 (28.Re5 Ra5 29.Rb1 Qa4=) 28...Qa5+= 29.h3 Raf8 30.R1e2 b6 31.Qc4 Qa8 32.Re7 (32.Qb3!?+=) 32...Qa1-/+ 33.Kh2 Qd4 34.Qe6 Qf4 35.Kg1 Qd4 36.Qb6 (better is 36.Kh2!?=) 36...Re7-/+ 37.Re7 Qf2 (37...Rf2?? 38.Qe6 Kh8 39.Rd7 Rg2 40.Kg2 Qb2 41.Kf3 Qf6 42.Qf6 gf6 43.Ke4+-) 38.Kh2 1–0. Hingst,Thomas (2095) – Vater,Siegbert (2020), remoteschach.de, 2009.

4.g3 e5 5.Bg2 d4 (5...a6 6.a4+=) 6.e3 de3 7.fe3 Bd7?? (7...Ne7 8.Nf3=) 8.a4 (better is 8.Bb7 Na6 9.Ba6+-) 8...Nh6?? (better is 8...Bc8=) 9.Bb7+- Na6? (9...Bg4 10.Ne2 Nd7 11.Ba8 Qa8+-) 10.ba6 (10.Ba6 Bg4 11.Ne2 Qd5+-) 10...Rb8 11.Qf3 Be7 12.Ne2 0-0 13.0-0 Nf7 14.d4 Nd6 (14...Bh3 15.Rd1+-) 15.de5 Nb7 16.ab7 (16.Qd5 Kh8 17.ab7 Bh3 18.Qd8 Rfd8 19.ef6 gf6 20.Rf6 Kg8+-) 16...fe5 (16...Bh3 17.Re1 fe5 18.Qe4+-) 17.Qd5 Kh8 18.Rf8 Qf8 (18...Bf8 19.Be5 (worse is 19.Qe5 Rb7 20.Bc1 Be7+-) 19...Qe8 20.Bc7 Qe3 21.Kh1 Qe2 22.Nc3+/–) 19.Be5 (19.Qd7!? Rd8 20.b8Q Rb8+-) 19...Bh3 (19...Bd6 20.Bd6 Qd6 21.Nbc3 Qd5 22.Nd5 Rb7 23.Rd1+-) 20.Nd2 (20.Nf4!? Qf5 21.Qd4 Rb7 22.Nh3 Qh3 23.Bg7 Kg8 24.Qd5 Kg7 25.Qb7 Qd7+-) 20...Bc5 21.Bd4 (better is 21.Nd4 Qe7 22.Re1 Bd4 23.ed4+-) 21...Rd8 (21...Bd4 22.Nd4 c5+-) 22.Qc5 Qc5 23.Bc5 Rb8 24.Rb1 Bc8 25.Ba7 (better is 25.bc8B Rc8 26.Ba7 Kg8+-) 25...Rb7 26.Rb7 Bb7 27.a5 Kg8 28.Nd4 Kf8 (28...g6 29.Ne6 c6 30.Bd4+-) 29.Ne6 Kf7 30.Nc7 (better is 30.Nd8 Ke7 31.Nb7 Kd7+-) 30...Ke7 31.a6 Kd6 32.ab7 Kc7 33.b8Q Kc6 34.c4 (34.Qc8 Kd6 35.Bc5 Ke5 36.e4 g6 37.Qc7 Ke6 38.Qe7) 34...Kd7 35.Qb6 (35.Qb7 Ke6 36.Ne4 h5 37.Qd5 Ke7 38.Bc5 Ke8 39.Qe6 Kd8 40.Bb6) 35...Ke7 (35...h5 36.Qb7 Ke6 37.Ne4 h4 38.Qd5 Ke7 39.Bc5 Ke8 40.Qe6 Kd8 41.Bb6) 36.Ne4 Kf7 (36...h6 37.Qb7 Ke6 38.Qd5 Ke7 39.Bc5 Ke8 40.Qe6 Kd8 41.Bb6) 37.c5 (37.Ng5 Ke7 38.Qe6 Kd8 39.Bb6) 37...g6 (37...h6 38.c6 Ke6 39.c7 Kf5 40.c8Q Ke4 41.Qbc6 Ke5 42.Bd4) 38.c6 (38.Qf6 Kg8 39.Ng5 h6 40.Qg6 Kf8 41.Qf7) 38...Ke6 39.c7 Kd5 (39...Kd7 40.Qd4 Kc7 41.Nc5 h6 42.Qd7) 40.Qd4 (40.Nc5 h6 41.Qe6) 40...Ke6 41.c8Q Kf7 (41...Ke7 42.Qf6) 42.Qd5 (42.Qf6) 42...Kg7 43.Bd4 Kh6 44.Qf8 1–0. MasterofDisaster – SeriousTrouble, Live Game Caissa's Web, 2004.

5.e3 b6 6.c4 Bb7 7.Nf3 Nd7 8.Be2 g6 (8...Bd6 9.0-0=) 9.0-0 Bg7 10.d4 Ne7 11.Nc3 (11.a5 ba5 12.Nbd2 a6 13.cd5 Nd5 14.dc5 Nc5+=) 11...0-0 12.Rc1 Rc8 13.Qb3 Kh8 14.cd5 ed5 15.Rfd1 c4 16.Qc2 f5 17.Ne5 (17.Ng5 Rf6+=) 17...Ne5= (worse 17...Be5 18.de5 Kg8 19.e4 fe4 20.Ne4+-) 18.de5 Ng8 (18...f4!? 19.ef4 Rf4=) 19.Bf3 (19.f4 Qd7+-) 19...Ne7+= 20.Ba3 Qe8? (20...Qd7 21.Nd5 Nd5 22.Bf8 Bf8 23.e4 fe4 24.Qe4+-) 21.Be7?? (better 21.Nd5 Bd5 22.Bd5 (22.Rd5?! Nd5 23.Bf8 Qf8 24.Bd5 Be5+-) 22...Be5 23.Be6+-) 21...Qe7= 22.Nd5 Bd5 (22...Qe5 23.Qe2 g5 24.Nc3 (24.Rc4? g4-+) 24...Bf3 25.Qf3=) 23.Rd5 (23.Bd5!? Be5 24.Bc4+-) 23...Be5+= 24.Rcd1 Bb8 (24...Rf7 25.Be2+=) 25.Rd7 Qe5 Black intends c3 (25...Qe6!?+-) 26.g3+- c3 27.R1d5 (27.Bc6 Qf6+-) 27...Qe6 (27...Qf6 28.Rd3+-) 28.Rb7+- Rcd8?? (better 28...Bd6+-) 29.Rd8 (better 29.Qc3 Be5 30.Re5+-) 29...Rd8 30.Qc3 (better 30.Rb8 Rb8 31.Qc3 Kg8 32.Qd4+-) 30...Kg8?? (30...Be5 31.Qb4 h6+-) 31.Qg7 1–0. BeepBeepImAJeep (2685) – na10042011 (2000), lichess.org, 2017.

5.e3 b6 6.c4 Bd6 7.Nf3 (7.cd5 e5+=) 7...Bc7 (7...Ne7 8.d4=) 8.Be2 g5? (8...Ne7 9.cd5 ed5 10.0-0=) 9.0-0 (better 9.Ng5!? Ke7 10.cd5 ed5 11.Qc2+-) 9...g4 10.Ne1 Qd6 11.g3 h5 12.f4 (better 12.d4+=) 12...f5?? (better 12...gf3 13.Nf3 h4+=) 13.Bh8+- h4 14.Be5 Qe7 15.Bc7 Qc7 16.cd5 (16.gh4 a6+-) 16...Qh7 (16...hg3 17.hg3 ed5 18.Rf2+-) 17.Nc3 (17.a5 hg3 18.hg3 ba5+-) 17...Nf6 18.de6 (better 18.gh4!? ed5 19.a5 d4+-) 18...hg3 19.hg3 Be6 (19...Bb7 20.Nd3 Qh3 21.Kf2+-) 20.Bf3! Nbd7 (20...gf3 21.Qf3 Combination) 21.Ba8 Nf8 22.Rf2 Ng6 23.Rh2 Nh4 24.Rh4 Qe7 25.Nd3 Bf7 26.Ne5 Ne4 27.Ne4 fe4 28.Rh8 Qf8 29.Rf8 (29.Qg4 Ke7 30.Qd7 Kf6 31.Rf8 Kg7 32.Rf7 Kh6 33.Rh7) 29...Kf8 30.Nf7 Kg7 (30...c4 31.Ne5 Kg7 32.Qg4 Kf8 33.Qf5 Ke7 34.Qd7 Kf8 35.Qf7) 31.Be4 (31.Qg4 Kf7 32.Qd7 Kf6 33.g4 a5 34.Be4 c4 35.g5) 31...Kf7 (31...Kf8 32.Ne5 Kg7 33.Qg4 Kf8 34.Qf5 Ke7 35.Qd7 Kf8 36.Qf7) 32.Qg4 Ke7 33.Qg6 (33.Qg7 Kd6 34.Bf5 Kd5 35.e4 Kd6 36.Qe5) 33...Kd7 (33...a5 34.Qg7 Ke6 35.f5 Kd6 36.f6 c4 37.Qe7) 34.Bd5 (34.Qf7 Kd6 35.Bc6 c4 36.Qd7 Kc5 37.Qe7) 34...Kc7 (34...Kd8 35.Qd6 Ke8 36.f5 c4 37.f6 c3 38.f7) 35.Qe6 (35.Qc6 Kd8 36.Be6 Ke7 37.Qd7 Kf8 38.Qf7) 35...a5 (35...a6 36.Qc6 Kd8 37.Be6 Ke7 38.Qd7 Kf8 39.Qf7) 36.Qe7 Kc8 37.Bc6 c4 38.Qd7 Kb8 39.Qb7 1–0. BeepBeepImAJeep (2540) – anscariusbarcino (1635), lichess.org, 2016.

5.e3 Nd7 6.c4 a6 (6...Ne7 7.a5=) 7.Nf3 (7.cd5!? Nb6 8.de6 Be6 9.Nf3+-) 7...ab5 8.ab5 Nb6 (8...Ra1 9.Ba1 Nb6 10.d3=) 9.Ra8+= Na8 10.Be2 Nc7 (10...dc4 11.Na3=) 11.0-0+= Bd6 12.d4 Ne7 13.Nbd2 0-0 14.Qb3 Qe8 (14...cd4!? 15.Bd4 Nf5+-) 15.b6+- Na6 16.cd5 Nd5 (16...cd4 17.Ba6 ba6 18.b7+-) 17.Ba6 ba6 18.b7 Bd7 19.Ne4 Qb8 (19...c4 A) 20.Nd6?! cb3 21.Ne8 Re8= (21...Be8?? 22.b8Q Bb5 23.Qd6+-); B) 20.Qc4 Bc7 21.Rc1+- (21.Qa6 Bb5 22.Qa1 Bf1 23.Qf1 Qc6=)) 20.Nc5 (20.Nd6!? Qd6 21.dc5 Qc7+-) 20...Bc5+- 21.dc5 Bc6 22.Nd4 Qb7 23.Qb7 Bb7 24.Ne6 Rc8 25.Rc1 Kf7 26.Nd4 Nb4 27.Ba3 Nd3 (27...a5 28.f3+-) 28.Rb1 (28.c6 Ba8 29.Rc3 Ne5+-) 28...Bc6 (28...Rc7 29.Nf5 Ba8 30.Rb8+-) 29.Nc6 (29.Rb6 Bb5+-) 29...Rc6+- 30.Rb6 Rc8 31.c6 a5 (31...Ne5 32.Rb7 Ke6 33.Re7 Kd5 34.Rg7 Rc6 35.h3+-) 32.g3 (32.Rb7!? Kg6 33.c7+-) 32...Ne5 33.Rb7 Ke6 (better 33...Kg6 34.c7 Nc4+-) 34.c7?? (better 34.e4 Nc6 35.Rg7+-) 34...Kd7=+ 35.Ra7 Rc7 (better 35...Nc4 36.Bc5 Rc7 37.Rc7 Kc7-/+) 36.Ra5+= Rc6 (36...Nc4 37.Ra6+-) 37.Ra7+- Rc7 38.Rc7 Kc7 39.Kg2 g6 (39...Kd7 40.e4+-) 40.Bb2 Kd7? (better 40...Nd7!?+-) 41.Be5+- fe5 42.Kf3 Ke6 43.Ke4 h6 (43...Kd6+-) 44.g4 g5 (44...Kd6+-) 45.h3 Kf6 46.Kd5 1–0. BeepBeepImAJeep (2120) – JimJaspers (2000), lichess.org, 2015.

5.e3 b6 6.c4 Bb7 7.Nf3 c5 8.Be2 dc4 9.Bc4 e5 (9...Bd5 10.Bd5 ed5 11.Nc3+=) 10.0-0 (10.Ne5 fe5 11.Qh5 Kd7 12.Qg4 Ke8 13.Bg8+-) 10...Bd5? (10...e4 11.Ne5 fe5 12.Qh5 Kd7 13.Qg4 Ke8 14.Bg8+-) 11.Be2 (better 11.Ne5 Bc4 12.Nc4+-) 11...Ne7 12.d4 cd4 13.ed4 Bf3? (better 13...e4 14.Nfd2 f5+-) 14.Bf3+- (14.gf3?! Nd7=) 14...ed4 (14...Nd7 15.Ba8 Qa8 16.de5 fe5+-) 15.Ba8 d3 (15...Nd7 16.Bf3+-) 16.Ra3 Nd5 (16...Nd7 17.Rd3 Qa8 18.Rd7 a6+-) 17.Rd3 Bc5 18.Bd5 Qd6 19.Bf7! Kf7 20.Rd6 Bd6 21.Qd6 Re8 22.Nd2 (22.Qd5 Kg6 23.g4 h6 24.Qf5 Kf7 25.Qh5 g6 26.Qd5 Kg7 27.Qb7 Nd7 28.Qd7 Kf8 29.Ba3 Kg8 30.Qe8 Kg7 31.Qe7 Kg8 32.Rd1 a6 33.Rd8) 22...Re6 23.Qb8 Kg6 24.Nf3 (better 24.Qg3 Kf7 25.Qb3 h5+-) 24...Re2 25.Qg3 Kf5 26.Nd4 Ke4 27.Qf3 Ke5 28.Qf5 (28.Qe2 Kd6 29.Rc1 Kd7 30.Qe6 Kd8 31.Rc8) 28...Kd6 29.Ba3 Kc7 30.Rc1 Rc2 31.Rc2 Kd8 32.Qc8 (32.Rc8) 1–0. BeepBeepImAJeep (2255) – JhonWin (1735), lichess.org, 2015.

5.e4 Bd6 (5...de4 6.Qh5 g6 7.Qe2=) 6.ed5 ed5 7.Nf3 Ne7 8.Be2 0-0 9.0-0 Bf5 10.d4 Nd7 11.c4 (11.Re1 Qc7=) 11...Be6 (11...dc4 12.Bc4 Kh8 13.Re1=) 12.Nbd2 (12.c5 Bc7+=) 12...Nf5 (12...dc4 13.Nc4 Bc7 14.Re1=) 13.Re1 Bf7 (13...dc4 14.bc6 bc6 15.Bc4+=) 14.Bd3+- Ne7 15.Qc2 g6 (15...Bg6 16.Bg6 Ng6 17.bc6 bc6 18.Qf5+-) 16.c5 Bf4 17.Re2 Kh8 (17...Re8 18.Rae1+-) 18.Rae1 Ng8 19.g3 (19.Bc1 Re8+-) 19...Bh6+- 20.Bc1 Bg7 21.Nb3 Rc8 22.a5 (22.Bd2 b6+-) 22...b6 (22...cb5 23.Bb5 Re8 24.Re8 Be8 25.Qe2+-) 23.bc6+- Rc6 (23...Nb8+-) 24.Bb5 Rc8 25.c6 Nb8 26.ab6 (26.Bf4 Nc6 27.Bc6 g5+-) 26...ab6 (26...Qb6 27.Qc5 Nc6 28.Qb6 ab6 29.h3=) 27.Ba3 (better 27.Bf4!? Nc6 28.Bc6+-) 27...Re8+= 28.Re8 (28.c7!? Rc7 A) worse 29.Re8 Be8 (29...Rc2?? 30.Rd8 Nc6 31.Rd7+-) 30.Re8 Qe8 (30...Rc2 31.Rd8 Nc6 32.Bc6 Rc6 33.Rd5+-) 31.Qc7 Qb5-/+; B) 29.Qc7 Qc7 30.Be8+=) 28...Be8=+ 29.Qe2 Bc6 30.Bc6 Nc6 31.Qe6 Na5 32.Na5 ba5 33.Bc5 h5?? (33...Rb8 34.Bd6 Rb7 35.Bc5=+ (35.Qd5? Rd7-+)) 34.Qa6?? (better 34.Nh4 Nh6 35.Ng6 Kh7 36.Ne7+-) 34...Ra8 (34...g5 35.Qd3=) 35.Qb5 (35.Qb7 Nh6+=) 35...Rb8 36.Qa4 Kh7 37.Ra1 Ne7 38.Qa5 Qa5 39.Ra5 Nf5 (39...Nc6 40.Ra6 Rc8 41.Rb6=) 40.Ra7+= Kh8 (40...Rb1 41.Kg2+=) 41.Ra6 (better 41.Rd7!?+-) 41...Kh7 42.h4 Rc8 43.Kg2 Rd8 44.Ne1 (44.Ra7 Kh6+=) 44...Re8 (44...g5 45.Nf3 g4 46.Ne1=) 45.Nd3 Rd8 (45...g5 46.Nb4 Rd8 47.Kh3+=) 46.Nf4+- Rd7 47.Ra5 1–0. BeepBeepImAJeep (2625) – donatas (2100), lichess.org, 2017.

5.e3 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 c6 (8...dc4 9.Bc4 Nb6 10.Bb3=) 9.Nf3 cb5 (9...Nb6 10.bc6 bc6 11.cd5 cd5 12.Bd4=) 10.cb5 (10.cd5 ed5 11.Nc3 Nc5 12.Bb5 Bd7+-) 10...Qa5 (10...Bd6 11.d4=) 11.Nc3 (11.Bc3 Qc7+=) 11...Nb6 12.Be2 Bd6 13.0-0 Ne7 14.Qb3 0-0 15.Bb2 Qb4 16.Qc2 (16.Qb4 Bb4 17.Ra1 Bd7=) 16...Bd7= Attacking the isolated pawn on b5 17.Rb1 Qa5 (17...e5 18.Ra1=) 18.Nd4 (18.Ra1 Qb4+-) 18...Rc8 (18...Qa8!?=) 19.Ra1+- Qb4 20.Ba3 Qa3 21.Ra3 Ba3 22.Qb3 Bd6 23.h3 Kh8 24.f4 Bc5 (24...Ra8 25.Nc2+-) 25.Nf3 Be8 (25...Bd6 26.Na4 Nc4 27.Bc4 Rc4 28.Nc3+-) 26.Kf2 (26.Na4 Na4 27.Qa4 Bg6+-) 26...Bf7 (26...Bd6 27.d4+-) 27.Qb2 (27.Na4 Nd7+-) 27...Nd7 (27...Bd6 28.d4+-) 28.Na4 (28.d4 Bd6+-) 28...Bd6 29.Nd4 e5 30.fe5 (30.Bg4 Rd8 31.Bd7 Rd7 32.fe5 fe5+-) 30...fe5+= 31.Nf3 Rf8 32.Ke1 e4 33.Ng5 (33.Nd4 Bg6+=) 33...Bg3 (33...Bg8 34.Qd4=) 34.Kd1 Bg6 (34...Bg8!?=) 35.Qb4 (35.Ne6 Rf6 36.Nac5 Nc5 37.Nc5 b6+-) 35...Re8 36.Ne6 Ne5 (36...Be5!?+-) 37.Nb6 Nf5 (better 37...Nf7+-) 38.Nd5 Bf2 (38...Nd7 39.Ndf4+- (39.Qe4?! Nc5 40.Nc5 Re4 41.Ne4 Ne3 42.Ne3 Be4+-)) 39.Nef4 (39.g4 Nh4 40.Ndc7 Rg8+-) 39...Ra8 (39...Nf7 40.g4 N5d6 41.Bc4+-) 40.Ng6 hg6 (40...Ng6 41.Qe4 Nd6 42.Qe6+-) 41.Nf4 (41.Qe4 Nf7+-) 41...g5 (41...Ng3 42.Ne6 Ra1 43.Kc2 Ra2 44.Kb3+-) 42.Ne6 Ra1 (42...Nf7 43.Qe4 N7h6 44.Bc4+-) 43.Kc2 Ra2 (43...Ra8 44.Qe4 Ne3 45.de3 Rc8 46.Kb1+-) 44.Kb1 Ra8 45.Ng5 (45.Qe4 Nh6 46.Qe5 Rg8+-) 45...Rc8 (45...Ng3 46.Qe7 Ne2 47.Qe5+-) 46.Qb2 (46.Qe4 Rf8 47.Qe5 Bg3 48.Nf7 Kh7 49.Qf5 Kg8 50.Bc4 Rc8 51.Qc8 Kh7 52.Bd3 g6 53.Qh8) 46...Nd3 (46...Re8 47.Ne4 Bh4 48.Qa2+-) 47.Bd3 ed3 48.Nf7 (better 48.Qe5!? Rf8 49.g4 Bg3+-) 48...Kh7 49.Ne5 (better 49.Qe5 g6 50.Qe6+-) 49...Kh6 (49...Bg3 50.Nd3 Rc4 51.Qb3+-) 50.Qb4 (better 50.Ng4 Kh7 51.Nf2 Re8+-) 50...Kg5 (50...Bg3 51.Nf7 Kh7+-) 51.Qg4 (51.Qf4 Kf6 52.g4 g6 53.gf5 Bg3 54.Ng4 Ke7 55.Qg3 Rc5 56.Qh4 Kd7 57.Ne5 Re5 58.Qd4 Kc8 59.Qe5 gf5+-) 51...Kf6 52.Qf4 (52.Qf4 Bg3 53.Nd7 Ke6 54.Qe4 Kd7 55.Qf5 Kc7 56.Qg5+-) 1–0. BeepBeepImAJeep (2635) – demestofos (2255), lichess.org, 2016.

5.e3 Nc5 6.c4 (6.d4 Ne4=) 6...Ne7 (6...dc4 7.Bc4 Nd3 8.Bd3 Qd3 9.Qh5 g6 10.Qf3=) 7.Nf3 (7.d4 Ne4=) 7...Nf5 (7...dc4 8.Bc4 Nd3 9.Bd3 Qd3 10.Nc3=) 8.Be2 (8.Ba3 e5=) 8...Be7 (8...dc4 9.Bc4 Nd3 10.Bd3 Qd3 11.Qc1=) 9.0-0 0-0 (9...dc4 10.Bc4 Nd3 11.Ba3+=) 10.d4 Ne4 11.Nbd2 Nd2 12.Nd2 c6 13.Qb3 Kh8 14.Rad1 Nd6 (14...cb5 15.ab5 (worse 15.Qb5 Bd7 16.Qb3 Qa5=) 15...a6 16.Ra1+=) 15.c5+- Nf7 16.e4 Bd7 17.Rfe1 Re8 18.Bg4 (18.Qe3 Kg8+-) 18...Bf8 (18...Kg8 19.Bh5+=) 19.ed5 (19.Bh5 Kg8+-) 19...ed5 20.Re8 (20.Bh5 Kg8+-) 20...Qe8+= 21.Qe3?? (better 21.Bd7 Qd7 22.bc6 bc6 23.Rb1+=) 21…Bg4 (21...Bg4 22.Re1 Qe3 23.Re3 cb5 24.ab5 Bd7-+) 0–1. BeepBeepImAJeep (2755) – may6enexttime (2840), lichess.org, 2020.

5.Nc3 a6 6.a4 A) 6...Be6 A1) 7.Nh3 Nh6 (7...ab5 8.Bb5 Nc6 9.0-0 Nh6 10.a5 Qd7 11.Qh5 Bf7) 8.f4 Nf5 9.fe5 fe5 10.e4 de4 11.Ne4 Qh4; A2) 7.Bd3 ab5 (7...Nh6 8.Nf3 Bc5 9.Be2 Bb4 10.0-0 0-0 11.Na2 Be7) 8.ab5 Ra1 9.Qa1 Nd7 10.Nf3 Kf7 11.Be2 Bc5; A3) 7.Be2 Nh6 (7...Bb4 8.Bg4 f5 9.Bh3 Nh6 10.Nf3 Nd7 11.Ne2 Bd6) 8.Nh3 Bb4 9.Bh5 g6 10.Bf3 0-0 11.0-0 Qd7; B) 6...Nh6 B1) 7.f4 Bc5 (7...ab5 8.fe5 fe5 9.Nf3 b4 10.Nb5 Bd6 11.Nd6 cd6 ) 8.Qh5 Nf7 9.d4 ed4 10.ed4 Bd4 11.Nge2 Bc3; B2) 7.Qh5 g6 (7...Nf7 8.Nf3 g6 9.Qh4 Bf5 10.d3 g5 11.Qh5 Bb4) 8.Qd1 Nf5 9.Be2 Bc5 10.g4 Ne7 11.g5 0-0; B3) 7.d4 Bb4 (7...ed4 8.Qd4 Be6 9.Nge2 Bd6 10.Qd3 Nd7 11.Nd4 Bf7) 8.de5 fe5 9.Nf3 e4 10.Qd4 Bc3 11.Bc3 ef3; C) 6...Ne7 C1) 7.Be2 Bf5 (7...ab5 8.ab5 Ra1 9.Qa1 Bf5 10.d3 Nd7 11.Qa7 Qb8) 8.Nf3 d4 9.ed4 ed4 10.Na2 c5 11.0-0 ab5; C2) 7.h4 Bf5 (7...ab5 8.ab5 Ra1 9.Qa1 Bf5 10.Bd3 Bd3 11.cd3 Nd7) 8.Bd3 Bd3 9.cd3 Nd7 10.Nf3 Nc5 11.Qc2 ab5; C3) 7.Nf3 Kf7 (7...ab5 8.ab5 Ra1 9.Qa1 Nd7 10.Be2 Kf7 11.0-0 Nb6) 8.Be2 Nd7 9.0-0 ab5 10.ab5 Ra1 11.Qa1 Nb6; D) 6...Kf7 D1) 7.Be2 Bb4 (7...Nh6 8.Nf3 Bb4 9.0-0 Be6 10.Ne1 ab5 11.ab5 Nd7) 8.Nh3 Ne7 9.0-0 Bh3 10.gh3 Qd6 11.f4 Nd7; D2) 7.Nh3 Ne7 (7...ab5 8.ab5 Ra1 9.Qa1 Ne7 10.Be2 Nd7 11.f4 e4 ) 8.f4 Nd7 9.Be2 e4 10.ba6 Nc5 11.ab7 Bb7; D3) 7.Nf3 Bb4 (7...Be6 8.Nh4 Ne7 9.Qh5 Kg8 10.h3 ab5 11.Bb5 e4 ) 8.Be2 Ne7 9.0-0 Be6 10.d4 e4 11.Nd2 Qd6.

5.Nc3 a6 6.d4 e4? (better is 6...ed4 A) 7.ed4 Bb4 (7...Ne7 8.Nh3 c6 9.Bd3 ab5 10.0-0 b4 11.Ne2 Bh3) 8.Nf3 Ne7 9.Bd3 0-0 10.0-0 Nf5 11.a4 Re8; B) 7.Qd4 Ne7+= (7...ab5 8.Qd5 Qd5 9.Nd5 Bd6 10.Bb5 Nc6 11.Nf3 Nge7 ) 8.Qa4 Nd7 9.ba6 Kf7 10.Nf3 ba6 11.0-0-0 Nb6; 6...Bd6 A) 7.de5 fe5 (7...Be5 8.Nf3 Bg4 9.Be2 Bf3 10.Bf3 Ne7 11.a4 0-0) 8.Qd5 Nf6 9.Qc4 Qe7 10.Nf3 Be6 11.Qa4 Nbd7; B) 7.e4 de4 (7...ab5 8.Nf3 Ne7 9.de5 fe5 10.Nb5 0-0 11.ed5 Bg4) 8.Ne4 Qe7 9.Bd3 ed4 10.Ne2 Bb4 11.Kf1 ab5; C) 7.Nd5 Ne7 (7...ed4 8.Bd4 ab5 9.Nf3 Ne7 10.Bb5 Nbc6 11.Nf4 Bf4) 8.Qh5 Kf8 9.Ne7 Qe7 10.de5 Be5 11.Be5 fe5; 6...Nd7 A) 7.Nd5 ab5 (7...Ne7 8.Nc3 ed4 9.Qd4 ab5 10.Nf3 Nc6 11.Qe4 Qe7) 8.Nf3 c6 9.Nc3 Nh6 10.Bd3 Ba3 11.Qc1 Qe7; B) 7.Nf3 ab5 (7...Ne7 8.de5 Ne5 9.Ne5 fe5 10.Qh5 Ng6 11.Bd3 e4) 8.Nd5 c6 9.Nc3 Nh6 10.Be2 Ba3 11.Qc1 Qe7; C) 7.de5 ab5 (7...Ne5 8.Qd5 ab5 9.Bb5 c6 10.Qd8 Kd8 11.Be2 Nh6) 8.Nb5 c6 9.Nd6 Bd6 10.ed6 Nc5 11.c4 Ne4; 6...ab5 A) 7.Bb5 c6 (7...Nd7 8.Bd7 Qd7 9.de5 fe5 10.Qh5 Kd8 11.Nd5 Nf6) 8.Be2 Ba3 9.Rb1 Nd7 10.Nf3 Ne7 11.de5 Ne5; B) 7.Nb5 c6 (7...Nd7 8.de5 c6 9.e6 Nc5 10.Nd4 Be6 11.Ngf3 Bd7) 8.Nc3 Ba3 9.Rb1 Nd7 10.de5 Bb2 11.Rb2 fe5; C) 7.de5 Nd7 (7...c6 8.Bd3 Qe7 9.Qh5 Qf7 10.Qf7 Kf7 11.Nf3 Nd7) 8.a4 ba4 9.Nf3 fe5 10.Qd5 Ngf6 11.Qe6 Qe7) 7.Qh5+- g6 8.Qd5 f5?? (8...Qd5 9.Nd5 Bd6+-) 9.Qe5 Qe7 10.Qh8 Qf7 (10...Nf6 11.0-0-0+-) 11.Qe5 Be7 (11...Kd7 12.d5 Qg7 13.Qg7 Bg7 14.Nh3+-) 12.Qc7 (12.Nd5 Kf8 13.Nc7 Nd7 14.Ne6 Ke8+-) 12...Nd7 13.Bc4 Qf6 (13...Qg7 14.ba6 ba6 15.Rb1+-) 14.Bg8 Bd6 15.Qc4 Nb6 16.Qb3 ab5 17.Nb5 Na4 18.Nd6 Qd6 19.Ba3 Qc7 20.Ne2 Qa5 21.Bb4 Qb6 22.Qf7 Kd8 23.Qe7 1–0. Stanley – Leo, private, 2011.

5.Nc3 a6 6.Nf3 A) 6...Ne7 A1) 7.Nh4 Be6 (7...ab5 8.Bb5 c6 9.Bd3 e4 10.Be2 Kf7 11.Bh5 Kg8 ) 8.a4 Nd7 9.ba6 ba6 10.Rb1 Rb8 11.Ba6 Nc5; A2) 7.a4 Kf7 (7...ab5 8.ab5 Ra1 9.Qa1 Nd7 10.Be2 Kf7 11.0-0 Nb6) 8.Be2 Nd7 9.0-0 ab5 10.ab5 Ra1 11.Qa1 Nb6; A3) 7.h3 ab5 (7...Be6 8.a4 Nf5 9.g4 Nd6 10.Rg1 Nd7 11.ba6 ba6) 8.Bb5 Nbc6 9.0-0 Kf7 10.Nh4 Kg8 11.Qf3 Be6; B) 6...ab5 B1) 7.Nb5 Nc6 (7...Ne7 8.Be2 Kf7 9.0-0 Nbc6 10.Nh4 Ng6 11.Ng6 hg6) 8.Be2 Kf7 9.0-0 Nge7 10.Nh4 g5 11.f4 ef4; B2) 7.e4 Ne7 (7...d4 8.Nb5 Nh6 9.c3 d3 10.Bd3 c6 11.0-0 cb5) 8.Bb5 c6 9.Bd3 d4 10.Ne2 Nd7 11.Bc4 Nc5; B3) 7.Bb5 Kf7 (7...Nc6 8.0-0 Nge7 9.d4 e4 10.Nh4 h5 11.Be2 Kf7 ) 8.0-0 Ne7 9.Nh4 Nbc6 10.f4 Kg8 11.f5 g5; C) 6...Kf7 C1) 7.a4 Bb4 (7...Be6 8.Be2 Bb4 9.0-0 Ne7 10.Nh4 g5 11.Nf3 ab5 ) 8.Be2 Ne7 9.0-0 Bf5 10.Nh4 ab5 11.Nf5 Nf5; C2) 7.b6 cb6 (7...c6 8.Be2 Ne7 9.0-0 Nd7 10.a4 Nb6 11.d3 a5) 8.e4 Ne7 9.d4 Nbc6 10.de5 Be6 11.ef6 gf6; C3) 7.e4 ab5 (7...d4 8.Bc4 Kg6 9.Ne2 ab5 10.Bb5 Be6 11.Nfd4 ed4) 8.Nd5 Nh6 9.Ne3 Bd7 10.a4 Be6 11.Bb5 Nc6; D) 6...Nh6 D1) 7.h3 Be7 (7...Be6 8.Bd3 Kf7 9.Nh4 e4 10.Bf1 g5 11.d3 gh4) 8.a4 0-0 9.Be2 Be6 10.0-0 ab5 11.ab5 Nd7; D2) 7.Nh4 Be6 (7...ab5 8.Bb5 Nc6 9.0-0 Bb4 10.Qh5 Kf8 11.h3 Be6) 8.f4 ab5 9.Bb5 c6 10.f5 Nf5 11.Nf5 cb5; D3) 7.a4 Bb4 (7...Kf7 8.e4 Be6 9.ed5 Bd5 10.Bd3 ab5 11.ab5 Ra1 ) 8.Be2 0-0 9.0-0 Be6 10.Na2 Be7 11.Nc3 Bb4.

5.Nc3 a6 6.f4 A) 6...ef4 A1) 7.ef4 Ne7 (7...d4 8.Ne4 Qd5 9.Qe2 Kf7 10.Qc4 Ne7 11.Qd5 Nd5) 8.Nf3 ab5 9.Bd3 Ng6 10.Bg6 hg6 11.Nb5 Bf5; A2) 7.Qf3 fe3 (7...ab5 8.Nd5 fe3 9.Ne3 Nc6 10.Bb5 Ba3 11.Ba3 Ra3) 8.Qe3 Kf7 9.Bd3 ab5 10.Nge2 Nh6 11.h3 Nc6; A3) 7.Qh5 g6 8.Qd5 fe3 9.de3 ab5 10.Qb5 c6 11.Qb3 Qe7; B) 6...d4 B1) 7.Ne4 Qd5 (7...de3 8.de3 Qd1 9.Kd1 ab5 10.fe5 Nc6 11.Nf3 Bf5) 8.Qf3 Bf5 9.Bd3 Be4 10.Qe4 Qe4 11.Be4 ab5; B2) 7.Nce2 de3 (7...ef4 8.Nd4 fe3 9.de3 c5 10.bc6 Nc6 11.Ngf3 Qa5) 8.de3 ab5 9.Qd8 Kd8 10.fe5 fe5 11.Nf3 Nc6; B3) 7.ed4 ed4 (7...Qd4 8.fe5 Qe5 9.Be2 Qc5 10.Nf3 Ne7 11.d4 Qb4) 8.Ne4 Qd5 9.Qe2 Kf7 10.Qc4 Ne7 11.Qd5 Nd5; C) 6...Nd7 C1) 7.f5 g6 (7...Nh6 8.Qh5 Nf7 9.ba6 Nc5 10.d4 ed4 11.ed4 Na6) 8.ba6 Ne7 9.fg6 hg6 10.Nf3 ba6 11.Rb1 Rb8; C2) 7.Nd5 ab5 (7...Nc5 8.Nc3 ef4 9.d4 Ne6 10.d5 Nc5 11.ef4 Bd6 ) 8.f5 g6 9.fg6 hg6 10.Qg4 Kf7 11.Bd3 f5; C3) 7.ba6 Ne7 (7...c6 8.Nf3 b5 9.fe5 fe5 10.Be2 b4 11.Nb1 Bd6) 8.Nf3 ba6 9.Rb1 ef4 10.ef4 Nc5 11.d4 Ne6; D) 6...ab5 D1) 7.Bb5 c6 (7...Nd7 8.Bd7 Qd7 9.fe5 fe5 10.Qh5 Kd8 11.Nf3 Nf6) 8.Bd3 e4 9.Be2 Bc5 10.Bg4 Na6 11.Na4 Ne7; D2) 7.Nf3 b4 (7...ef4 8.Bb5 c6 9.Bd3 Qb6 10.Qc1 Nh6 11.0-0 fe3 ) 8.Ne2 e4 9.Nh4 f5 10.g3 Nc6 11.Bh3 Nf6; D3) 7.fe5 Nd7 (7...c6 8.Bd3 b4 9.Nb1 Qe7 10.Qh5 Qf7 11.Qf7 Kf7 ) 8.Nd5 fe5 9.Bd3 Nh6 10.Nc3 Nc5 11.Bb5 c6.

5.Nc3 a6 6.Nh3 A) 6...Ne7 A1) 7.f4 e4 (7...Nd7 8.ba6 ba6 9.Rb1 Kf7 10.e4 c6 11.Qf3 ef4) 8.a4 Kf7 9.Be2 Bh3 10.gh3 Nf5 11.Bh5 g6; A2) 7.a4 ab5 (7...Kf7 8.Bd3 e4 9.Be2 Bh3 10.gh3 Nd7 11.ba6 ba6 ) 8.ab5 Ra1 9.Qa1 Nd7 10.Be2 Nc5 11.0-0 Nf5; A3) 7.d4 ed4 (7...Nd7 8.ba6 ba6 9.Rb1 Rb8 10.Be2 c6 11.0-0 Kf7 ) 8.ed4 Kf7 9.Bd3 ab5 10.Nf4 g5 11.Nh5 Nf5; B) 6...ab5 B1) 7.Nb5 Nc6 (7...Nd7 8.c4 c6 9.Nc3 d4 10.ed4 ed4 11.Ne4 Ne5) 8.d4 Nge7 9.de5 Ne5 10.Nf4 Kf7 11.Be2 c6; B2) 7.a3 c6 (7...Nh6 8.Bb5 Nc6 9.0-0 Bg4 10.f3 Bh3 11.gh3 Nf5) 8.Be2 Ne7 9.0-0 Bh3 10.gh3 Nd7 11.h4 g6; B3) 7.Bb5 Nc6 (7...Kf7 8.0-0 c6 9.Bd3 Nh6 10.Qh5 g6 11.Qf3 Na6 ) 8.0-0 Nh6 9.e4 de4 10.Ne4 Bg4 11.Qe1 Ba3; C) 6...Be6 C1) 7.d4 Bd6 (7...Nh6 8.de5 fe5 9.f4 Qd7 10.Ng5 Bb4 11.Qh5 Nf7 ) 8.de5 fe5 9.f4 Nf6 10.Ng5 Qd7 11.fe5 Be5; C2) 7.Bd3 ab5 (7...Nh6 8.0-0 ab5 9.Nb5 Nc6 10.f4 e4 11.Be2 Bc5 ) 8.Bb5 Nc6 9.0-0 Nh6 10.f4 e4 11.a4 Bb4; C3) 7.f4 d4 (7...Nh6 8.fe5 fe5 9.Qh5 Nf7 10.Be2 Be7 11.0-0 g6) 8.Ne4 de3 9.fe5 Bb4 10.Bd3 f5 11.Nc3 Qh4; D) 6...Nh6 D1) 7.f4 c6 (7...d4 8.Ne4 de3 9.fe5 f5 10.Neg5 Bb4 11.c3 Be7) 8.fe5 fe5 9.Qh5 Nf7 10.e4 g6 11.Qf3 d4; D2) 7.Qh5 g6 (7...Nf7 8.e4 d4 9.Nd1 g6 10.Qh4 Be7 11.c3 0-0) 8.Qf3 Be6 9.e4 de4 10.Qe4 c6 11.Qa4 Be7; D3) 7.d4 Be6 (7...Bg4 8.Be2 Bh3 9.gh3 e4 10.f3 ef3 11.Bf3 Bb4) 8.de5 fe5 9.f4 Bb4 10.Qh5 Nf7 11.Ng5 Qf6.

5.Nc3 d4 6.ed4= ed4 7.Qh5 g6 8.Qe2 Ne7 (8...Be7 9.Ne4+=) 9.Ne4+/– f5? (better is 9...Bg7!? 10.Qc4 Nf5+/–) 10.Nf6+- Kf7 11.Nf3 Nd5 (11...Nec6 12.bc6 Nc6 13.Qc4 Kf6 14.Nd4+-) 12.Nd5 Qd5 13.Bd4 (13.Nd4 Bg7 14.Qc4 Re8 15.Kd1 Be6 16.Ne6 Qe6 17.Qe6 Re6+-) 13...Bg7 14.Ng5 Kg8 (14...Kf8 15.Bg7 Kg7 16.Qe7 Kg8 17.Qc7+-) 15.Qe8 Bf8 16.Bh8 (16.Bh8 Bd7 17.Qe5+-) 1–0. pierre – leum, internet, 2009.

5.Nc3 Be6 6.f4 (6.d4 Bd6+=) 6...ef4 (6...Nd7+=) 7.Nge2 (7.ef4!? Bd6 8.Qh5 g6 9.Qf3=) 7...fe3-/+ 8.Nd4 (8.Nf4 Bf7 9.de3 c6-/+) 8...Bf7 (8...ed2 9.Qd2 Bc8 10.Be2-/+) 9.de3+= Bd6 (9...Qe7 10.Qd2-/+) 10.Qg4 Bf8 (10...g6!?+=) 11.Ne6= Be6 12.Qe6 Ne7 13.e4 Qd7 (13...Nd7 14.ed5 Nc5 15.Qe3+=) 14.ed5+/– Qe6 (14...c6 15.Qd7 Nd7 16.dc6 bc6 17.Ne4+/–) 15.de6 Nf5 (15...c6 16.0-0-0+/–) 16.Bd3 Nd4? (16...Nh4 17.Ke2+/–) 17.0-0-0 (better is 17.Nd5 Ne6 18.Bf5 c6 19.bc6 bc6 20.Be6 Na6+-) 17...Bc5? (better is 17...c6+/–) 18.Na4 (18.Nd5 Ne6 19.Rhe1 Kd8 20.Nf6 Nd4+-) 18...Ne6 19.Rhe1 (19.Nc5?! Nc5 20.Rhe1 Kf7 21.Bc4 Kg6+-) 19...Kf7 (19...Bd6 20.Re6 Kf7 21.Bc4+-) 20.Bc4 Bd6 (20...Kg6 21.Be6 Bb6 22.Nb6 ab6 23.Bc4+-) 21.Be6 Kg6 22.g3 1–0. marre – jdfh, internet, 2010.

5.c4 Bc5 6.Nf3 Ne7 (6...Bg4 7.cd5 Qd5 8.Nc3+=) 7.d4 0-0?? (better is 7...ed4 8.Bd4 Bb4 9.Bc3 Bc5=) 8.dc5+- c6 9.Be2 (9.cd5 cd5 10.Be2 Bf5+-) 9...Bd7 (9...Be6 10.cd5 Nd5 11.a4+-) 10.0-0 b6 (10...Be6 11.cd5 cd5 12.Nbd2+-) 11.cd5 cd5 (11...Nd5 12.Bc4 Be6 13.Nc3+-) 12.c6 Bf5 (12...Be6 13.Nc3+-) 13.Qc1 (better is 13.Ba3!? Be6 14.Nc3 Rf7+-) 13...Qc7 14.Rd1 a6 15.a4 ab5 16.ab5 e4 (16...Ra1 17.Ba1 Rd8+-) 17.Ra8 ef3 18.Bf3 g5 (18...Be6 19.Ba3 Re8 20.Nc3+-) 19.Bd5 Nd5 20.Rd5 Be4 21.Rd2 h5 22.Qc4 Rf7 23.Qe4 f5 24.Qe8 Kh7 25.Rb8 Kh6 26.Qe6 Kh7 27.Rh8 1–0. bridlingtonbrummie – 19larry, ChessWorld.net, 2009.

5.c4 Be6 6.cd5 Qd5 7.Nc3 =.

5.d4 ed4 6.Bd4 Nh6 =.

5.Nc3 f5 6.f3 ef3 7.Nf3 Bb4 8.Nd5 Qd5 (8...Qd5 9.Bg7 Combination; 8...ed5 9.Bg7 Combination) 9.Bg7+- e5 10.Bh8 Nd7 11.c3 Ba3 12.Ne5! Kf8 (12...Ne5 13.Qe2) 13.Qb3 Qe4 14.Be2 Bd6 (14...Ne5 15.Qa3 Kf7 16.Be5 Qe5+-) 15.Qf7 1–0. michaelbuss – dunk0104, ChessWorld.net, 2013.

5.Qh5 g6 6.Qh4 Qe7 7.Nc3 (7.Qe4 Nd7=) 7...Bg7 (7...Qb4!? 8.Rb1 e3=+) 8.Ne4 f6 becomes the focus of attention 8...c6 (8...e5 9.Bc4=) 9.a4 cb5 10.ab5 a6 (10...Qc7 11.Bc4!+/- (11.Bf6? Nf6 12.Nf6 Kf7-+)) 11.Nf3 ab5?? (better 11...Kd8+/-) 12.Bb5 (better 12.Ra8 Qc7+-) 12...Bd7 (12...Kd8 13.Ra8 Qb4 14.Rb8 e5 15.Ne5 Ne7 16.Nf7 Kc7 17.Qg3 Kb6 18.Qe3 Kc7 19.Qf4 Kb6+-) 13.Ra8 Bb5 (13...Kd8 14.Bd7 Kd7 15.Ba3+-) 14.Rb8 Kf7 15.Nfg5! (15.Nfg5 fg5 16.Ng5 Qg5 17.Qg5+-) 1-0. DEFFM – GuestCXZY, freechess.org, 2021.

5.Qh5 g6 6.Qh4 Bg7 7.Nc3 (7.Qe4 Ne7=) 7...f5=+ 8.Qd8 Kd8 9.Nh3 Ne7 10.Ng5 Ke8 11.Bc4 Nd5 (better 11...a6!? 12.Rb1 h6 13.Ne6 Be6 14.Be6 Rh7=) 12.Nd5+/- Bb2 13.Nc7 Can e6 get defended? 13...Ke7?? (better 13...Kd7 14.Na8 Ba1+=) 14.Rb1+- (14.Na8 Ba1 15.Nc7 Bd7 16.Nge6 Rc8-/+) 14...Bf6 15.h4 (15.Na8?! Bg5 16.b6 a6+-) 15...Bg5 (15...b6 16.Na8 h6 17.Nh3+-) 16.hg5 (16.Na8?! Bf4 17.b6 a6+-) 16...Kd6 (16...b6 17.Na8 Kd6 18.Rb3+-) 17.Na8 (17.b6 Bd7 18.Na8 Nc6+-) 17...Nd7 (17...b6+-) 18.b6 a6 19.Be2 Nf6 (19...e5+-) 20.gf6 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

(--> 1.b4 e6 2.Bb2 Nf6 3.b5 d5).

4.a4 c5 5.e3 b6 6.Nf3 Bb7 7.Be2 Be7 8.0-0 0-0 9.d3 Nbd7 10.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d3).

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

4.a4 Bd6 5.e3 0-0 6.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.a4).

4.a4 Bd7 5.e3 c6 6.c4 dc4 7.Bc4 cb5 8.ab5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 cb5 6.ab5 Bd7 7.c4 dc4 8.Bc4).

4.c4 dc4 5.e3 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.c4 dc4).

4.d4 Bd6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.d4).

4.Nf3 Bd7 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.Nf3).

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4).

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

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bd6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6).

5.e3 ab5 6.ab5 Ra1 7.Ba1 Nbd7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7).

5.e3 ab5 6.ab5 Ra1 7.Ba1 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Be7).

5.e3 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 a6 6.a4).

5.e3 Bd6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Bd6).

5.e3 0-0 6.c4 c6 7.Nf3 cb5 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 cb5).

5.e3 0-0 6.c4 c6 7.Nf3 dc4 8.Bc4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3 c6 8.a4).

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

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

4.e3 a6 5.a4 Bd6 6.Nf3 ab5 7.ab5 Ra1 8.Ba1 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7 8.Nf3 Bd6).

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

4.e3 Bd7 5.a4 a6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Bd7).

5.c4 Be7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4).

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

5.Nf3 b6 6.c4 Bb7 7.a4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.a4).

5.Nf3 b6 6.c4 Bb7 7.a4 Nbd7 8.Be2 Be7 9.0-0 0-0 10.d4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d4).

5.Nf3 Bd6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5).

5.Nf3 Bd6 6.c4 b6 7.a4 Bb7 8.Be2 0-0 9.0-0 Nbd7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.Nf3 Bd6 6.c4 Nbd7 7.Be2 b6 8.0-0 0-0 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6).

5.Nf3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

5.Nf3 Nbd7 6.c4 b6 7.Be2 Bb7 (---> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2 Nbd7).

5.Nf3 Nbd7 6.c4 Bd6 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

5.Nf3 Be7 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.Be2 c5).

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

5.c4 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).

5.c4 cb5 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5).

5.c4 0-0 6.Nf3 Nbd7 7.d4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.d4).

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

5.Nf3 0-0 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0).

5.Nf3 0-0 6.Be2 Nbd7 7.0-0 c5 8.c4 b6 9.a4 Bb7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.Nf3 0-0 6.Be2 Nbd7 7.0-0 e5 8.c4 e4 9.Nd4 dc4 10.Bc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.Be2 dc4 8.Bc4 e5 9.0-0 e4 10.Nd4).

5.Nf3 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4).

5.Nf3 c5 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5).

5.Nf3 c5 6.c4 0-0 7.d3 Nbd7 8.Nbd2 b6 9.Be2 Bb7 10.0-0 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.d3 Bb7 10.Nbd2).

5.Nf3 c5 6.c4 0-0 7.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

5.Nf3 c5 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

5.c4 c5 6.Nf3 Bd6=+ (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

5.Nf3 Bd6 6.d4 0-0 7.Be2 c5 8.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.d4).

5.c4 0-0 6.Nc3 c6 7.Nf3 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).

5.Nf3 0-0 6.c4 c5 (no 7.bc6) (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0).

5.Nf3 0-0 6.c4 c5 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2).

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

5.Nf3 0-0 6.Be2 c5 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2).

5.Nf3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7).

5.Nf3 c5 6.c4 0-0 7.a4 b6 8.Be2 Bb7 9.0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4).

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

5.Nf3 c6 6.c4 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).

5.f4 c5 6.c4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.f4 Be7 6.Nf3 0-0 7.c4).

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6 8.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6 8.Nf3).

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6 8.e3 0-0 9.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.Be2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1).

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3).

5.e3 Be7 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.c4 b6).

5.c4 Nbd7 6.e3 Bd6 7.Be2 0-0 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

5.e3 Be7 6.Be2 Nbd7 7.0-0 b6 8.d3 0-0 9.c4 Bb7 10.a4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d3).

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

5.e3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Nbd7).

5.e3 c5 6.Be2 Be7 7.0-0 0-0 8.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 Nbd7 8.0-0).

5.e3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Nbd7).

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

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

5.e3 b6 6.Be2 Bb7 7.0-0 Nbd7 8.d3 0-0 9.c4 c5 10.Nbd2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0-0 7.0-0 d5 8.d3 c5 9.Nbd2 Nbd7 10.c4).

4.d3 Be7 5.Nf3 Nc6 6.d4 e5 7.de5 Ne4 (7...Ng4!?=) 8.Nbd2 Bg5 (8...0-0 9.e3+=) 9.Ne4 Bf5?? (better is 9...de4 10.b5 ef3 11.bc6 Qe7 12.cb7 Bb7 13.Qa4 c6+/–) 10.Nc5 (better is 10.Neg5!? h6 11.Nh3 Bh3 12.gh3 Qd7+-) 10...0-0 (10...Be7+-) 11.Nb7 Qe7 12.Qd5 (better is 12.Ng5 Qg5 13.Qd5+-) 12...Bd7 (12...Nb4 13.Qc4 Nc2 14.Kd1 Rab8+=) 13.Bc1 (better is 13.Ng5 Nb4 14.cb4 Qb4 15.Qd2 Qd2 16.Kd2 Rfb8+-) 13...Bc1 14.Rc1 h6 (14...Rab8 15.Nc5 Rfd8 16.e3+-) 15.Nc5 Rad8 16.e3 g6 (16...Nb8 17.Qc4+-) 17.Be2 (better is 17.Nd7 Qd7 18.Qd7 Rd7+-) 17...Kh7 (17...Nb8 18.Qc4+-) 18.0-0 (18.Nd7 Qd7 19.Qd7 Rd7+-) 18...Qe8 (18...Nb8 19.Qc4+-) 19.Nd7 Ne7 (19...Qd7 20.Qd7 Rd7+-) 20.Rfd1 (better is 20.Nf6 Kh8 21.Qc5+-) 20...Nd5 21.Rd5?? (better is 21.Nf8 Qf8 22.Bc4+-) 21...Rd7+/– 22.Rcd1 (better is 22.Bb5!? Rd5 23.Be8 Re8 24.c4+-) 22...Rd5+= 23.Rd5 Qc6 (23...Qa4 24.Ra5 Qc2 25.Nd4 Qc3 26.Ra7 Qb4 27.Rc7 Qb1 28.Bf1 Qa2 29.h3+=) 24.Rd3 (better is 24.Rc5!? Qa4 25.Rc7 Qa2 26.Nd4+/–) 24...Qc4= 25.a4 Rd8?? (25...c5=) 26.Ne1 (better is 26.Rd2 Qc3 27.Rd8 Qb4 28.Rd7+-) 26...Rd3-/+ 27.Bd3?? (better is 27.Nd3 a5 28.ba5 Qa4 29.Bf1-/+) 27...Qc3-+ 28.Kf1 Qb4 29.Bb5 Qb1 (29...c6 30.Bd3-+) 30.Ke2 (30.h4 Qe4-+) 30...Kg7 (30...Qa2 31.Kf1-+) 31.h4 (31.Nf3 Qc2 32.Nd2 c6-+) 31...f6 (31...Qa2 32.Kf1-+) 32.e6 (32.ef6 Kf6 33.g4-+) 32...Qa2 33.Kf3 Qe6 34.g4 c6 35.Bd3 c5 36.Bb5 (36.Bc2 h5 37.gh5 gh5-+) 36...Qd5 (36...c4!? 37.Nc2 h5 38.Ke2-+) 37.Kg3 f5 (37...a6 38.Bd3-+) 38.f3 (38.gf5 a6 (worse is 38...gf5 39.Nd3-+; worse is 38...Qf5 39.Nd3-+) 39.Bd3 gf5-+) 38...Qe5 (38...c4!? 39.Ng2 fg4 40.fg4-+) 39.Kf2 Qh2 (39...fg4!? 40.fg4 Qe4 41.Be2-+) 40.Ng2 Qc7 41.gf5 g5 (better is 41...gf5!? 42.Nf4 Qe5 43.Bd3-+) 42.hg5 h5?? (better is 42...hg5 43.f4 Kf6 44.fg5 Kg5-+) 43.f6+/– Kg6?? (better is 43...Kh7 44.Bd3 Kh8+-) 44.f4 (44.Nf4!? Kh7 45.Bc4 Qb8 46.g6 Kh8 47.g7 Kh7+-) 44...Qb6?? (44...Qd8+=) 45.Bd3 (better is 45.Nh4 Kf7 46.Bc4 Ke8 47.f7 Kf8 48.f5 Qb2 49.Kf3 Qb7 50.Kg3 Qc7 51.Kh3 Qf7 52.Bf7 Kf7 53.Ng6+-) 45...Kf7= 46.Bc4 Kf8 47.Nh4 Ke8?? (better is 47...Qb2 48.Be2 Kf7=) 48.Ng6 Qd6 (48...Qb7+-) 49.f7 Kd7 50.f8Q Qd2 51.Kf3 Qd1 52.Ke4 Qc2 53.Bd3 (53.Ke5 Qg6 54.f5 Qc6+-) 53...Qg2 54.Kf5 Qd5 55.Ne5 Kc7 56.Qg7 (56.Be4 Qd2 57.Qe7 Qd7 58.Qd7 Kb6 59.Qc6 Ka5 60.Qb5) 56...Kb6 57.Qf6 Ka5 58.Bb5 Kb4 59.Bc4 (better is 59.g6 Kc3+-) 59...Qh1 60.Nd3 (better is 60.g6 Qh3 61.Kg5 Qe3 62.g7 Qg3 63.Kh5 Qh3 64.Qh4+-) 60...Kc4 61.Qa6 Kb3 (61...Kc3+-) 62.Nc5 Kb4 (62...Kc2 63.Qd3 Kc1+-) 63.Qb5 Kc3 64.Qb3 Kd2 65.Qd3 (65.Ne4 Qe4 66.Ke4 Ke2 67.Qc2 Ke1 68.Kf3 h4 69.Qe2) 65...Kc1 66.Qa3 (66.Qa3 Kb1 67.Qb3 Kc1 68.e4+-) 1–0. tradicio – boldeagle, ChessWorld.net, 2005.

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.c3).

4.Nf3 Bd6 5.e3 0-0 6.Bd3 (6.Be2 Bd7+=) 6...e5-/+ 7.0-0? (better is 7.Be2-/+) 7...e4-+ 8.Nd4 (8.Be2 ef3 9.Bf3 Qe7-+) 8...ed3 9.Ba3 (9.Nb5 Be7-+) 9...Ne4 (9...c6 10.Bb2-+) 10.Qc1 (10.b5 a6-+) 10...Qg5 11.f3 (11.Nf3 Qh6 12.b5-+) 11...Bh3 12.Rf2 (12.g4 Bf1 13.Kf1 Qh4 14.fe4 Qh3 15.Kf2 Qh2 16.Kf1 Bg3 17.ed5 Qh1) 12...Nf2 (12...Bh2 13.Kf1 Nf2 14.Ke1 Qg2 15.c4 Qf1) 13.Kf2 (13.Qf1 Nd1 14.Kh1-+) 13...Qg2 14.Ke1 Qf1 0–1. soraya – kurosakana (1810), net–chess.com, 2008.

4.h4 Be7 5.Nf3 c5 6.bc5=+ Bc5 7.d4 Be7 8.Qa4 Nc6 9.Qb3 0-0 10.e3 b6 11.h5 Bb7 (11...h6-/+) 12.Ne5? (better 12.h6!? Na5 13.Qc2=+) 12...Ne5-+ 13.de5 Ne4 (13...Ng4!? 14.h6 Nh6 15.Nd2-+) 14.Nd2-/+ Nd2 15.Kd2 Bg5 (better 15...f6!? 16.ef6 Bc5-/+) 16.Bd3 Bh4 17.g3 Be7 18.Qc2 (better 18.h6!? g6 19.f4=) 18...h6-/+ 19.Bh7 Kh8 20.Bd3 d4 (better 20...Bc6-/+) 21.Rh2? (better 21.ed4 Bh1 22.Rh1=) 21...de3-+ 22.fe3 Bg5 23.Ke2? (better 23.Ba3 Qd5 24.Bd6-+) 23...Qd5 24.c4 (24.Rf1 Qe5 25.Rf4 Bf4 26.gf4-+) 24...Qf3 25.Kd2 Be3 26.Kc3 Qg3 27.Re2 Bg5 (27...Rfd8 28.Re3 Qe3 29.Qe2-+) 28.Ba3 (28.Bc1 f5 29.Bg5 hg5-+ (worse 29...Qg5 30.Qc1-+)) 28...Rfd8 29.Bd6 (29.Rd1 Rac8 30.Kb2 b5-+) 29...Rac8 (29...Rd6 30.ed6 Bf6 31.Kb3 Ba1 32.a3-+) 30.Rf1 (30.Kb4 Be7! 31.Kb3 Bd6 32.ed6 Rd6-+) 30...b5 31.c5 (31.Kb2 bc4 32.Bc4-+) 31...Bf3 (better 31...Rd6 32.Kb2 Rd3 33.Rff2-+) 32.Ref2 (32.Kb2-+) 32...Bb7 (32...Rd6 33.Rf3 Qe5 34.Kb3 Rc5 35.Rf7 Qd5 36.Kb4 Qd4 (36...Qd3?! 37.Qd3 Rd3 38.Kc5=) 37.Kb3 Qa4 38.Kb2 Rc2 39.Bc2 Qb4 40.Ka1 Bf6 41.R1f6 Qc3 42.Kb1 gf6 43.Rb7 Rd2 44.Rb8 Kg7 45.Rb7 Kf8 46.Rf7 Kf7 47.Bg6 Ke7 48.Bc2 Qc2 49.Ka1 Qa2) 33.Rf7 (33.Re2 Rd6 34.ed6 Rc5 35.Kb2 Rc2 36.Kc2 Qd6 37.Ref2-+) 33...Rd6?? (better 33...Be4! 34.Rd1 Bf3-+) 34.Rf8 (34.Rf8 Rf8 35.Rf8) 1–0. beatmeeasy (1890) – Marius529 (1900), lichess.org, 2020.

5.Na3 c5 6.bc5 Bc5 7.e3 0-0 8.d4 Be7 9.Bd3 Qa5 10.0-0?? (10.Qb3 b6+=) 10...Nc6?? (10...Ba3 11.Ba3 Qa3 12.c4-+) 11.Ne5?? (better is 11.Qb3=) 11...Ba3-+ 12.Nc6 bc6 13.Ba3 Bd7?? (better is 13...Qa3 14.Qb3 Qd6-+) 14.Bb4+- Qc7 15.Bf8 Rf8 16.Rb1 Qa5 17.Qb3 c5 18.dc5 Qc5 19.Rbc1 Ne4 (19...e5 20.c4+-) 20.Bb1 (better is 20.Be4!? de4 21.Qb4+-) 20...Nd2+/– 21.Qc2 Nf1?? (better is 21...Nb1 22.Rb1 Rc8+/–) 22.Rf1 (22.Qh7) 22...f5+= 23.Qd3 (better is 23.Qd2!?+=) 23...Bb5-+ 24.Qd4? (better is 24.c4!? Qc4 25.Rd1-/+) 24...Qd4 25.cd4 Bf1 26.Kf1 Rb8 (26...Rc8!? 27.Bd3 Rc1 28.Ke2-+) 27.Bc2 Rb2 28.Bb3 Kf7 29.g3 g5 30.Kg2 f4! 31.gf4 (31.ef4 gf4 Combination; 31.gf4 gf4 Combination) 31...gf4 32.ef4 Rd2 33.f5 Rd4 34.fe6 Ke6 35.Kg3 Ke5 36.h4 a5 37.a4?? (37.f4 Rf4 38.Bd5 Rh4 39.Bf7-+) 37...Rd3 (37...Rd3 38.f3 Rb3-+) 0–1. preethan (2295) – sbeaul (2470), net–chess.com, 2016.

5.e3 0-0 6.Be2 c5 (6...a5 7.b5+=) 7.bc5= Bc5 8.Ba3 (8.0-0 Bd6=) 8...Nbd7 (8...Ba3 9.Na3 Nc6 10.0-0+=) 9.d4 Be7 (9...Ba3 10.Na3 Ne4 11.Qd3=) 10.Be7 (10.0-0 b6=) 10...Qe7 11.0-0 b6 12.h3 (12.c4 dc4 13.Bc4 Bb7=) 12...Bb7 13.Nbd2 (13.Qb3 Rac8=) 13...Rac8 14.c4 dc4 15.Bc4 Ne4 (15...Rc7 16.Qb3+=) 16.Ne4 Rc4 17.Ned2 Rc7 18.Rc1 Rfc8 19.Rc7 Rc7 20.Qe2 (20.e4 Nf6 21.Qb1 Qa3=) 20...Qa3 21.Ne4?? (better is 21.Ra1+=) 21...Be4-+ 22.Ra1 Rc1 (22...Bf3 23.Qf3 Rc2 24.Qd1-+) 23.Rc1 Qc1 24.Kh2 Qc6 25.Kg3 (25.Ng5 Qc7 (25...Bg2?! 26.Qh5 Qc7 27.Kg2-/+) 26.g3 Bd5-+) 25...Qd6 26.Kg4 (26.Kh4 h6 27.Ne5 g5 28.Kg3 f6-+) 26...Bf5 27.Kh4 Nf8 28.g4 (28.Qb5 f6 29.a4 h6-+) 28...Ng6 29.Kh5 Be4 (29...e5 30.g5 ed4 31.Qd2-+) 30.Ng1 h6 31.f4 Qd5 (better is 31...Nf4 32.ef4 Qf4 33.Nf3 Kh7 34.Qf1 Qf6 35.g5 Bf3 36.Qf3 Qg5) 32.g5 hg5 33.fg5 Bf5 (better is 33...f6 34.Qg4 Ne7-+) 34.Qf3 Qf3 (better is 34...Qa2!? 35.e4 Be4 36.Qe4-+) 35.Nf3 Bh3 36.e4 Bg2 (better is 36...Kf8 37.Ne1-+) 37.Nd2 (37.Kg4 Bf3 38.Kf3 Kf8-+) 37...Nf4 38.Kg4 Ne2 39.Nb3 (39.a3-+) 39...Be4 40.a4 Bc2 (40...f5 41.gf6 gf6 42.Kh5-+) 41.Nd2 (41.Kf3 Nc3 42.Nd2 Ba4-+) 41...Nd4 42.Nc4 (42.Kf4 Ba4 43.Ke5 Nc6 44.Kd6 Nb4-+) 42...Ba4 43.Nd6 b5 44.Kf4 b4 45.Ke5 b3 46.Nc4 Nf3 47.Kf4 Nd2! 48.Nd2 b2 49.Nb1 Bc2 50.Na3 b1Q 51.Nb1 Bb1 52.Ke5 a5 53.g6 a4 54.gf7 Kf7 55.Kd4 a3 56.Kc3 a2 57.Kb2 e5 58.Ka1 e4 59.Kb2 e3 60.Ka1 (60.Kc3 a1Q 61.Kb4 Qd4 62.Kb5 Be4 63.Ka5 Qc5 64.Ka6 Qb4 65.Ka7 Qb7) 60...e2 61.Kb2 0–1. dovlov – shakuni, net–chess.com, 2004.

4.a3 a5 =+.

4.Qa4 c6 5.e4 (5.b5 a6 6.Qc4 ab5-/+) 5...b5 6.Qa3 (6.Qc2!?-/+) 6...Nf6-+ 7.f3 (7.Qf3 Bb4 8.a3 Bc5-+) 7...Na6 (7...a5 8.Bc3-+) 8.Bc3 Nh5 (better is 8...c5 9.bc5 Nc5-+) 9.g4? (better is 9.Nh3-+) 9...Nf4 (better is 9...Qh4!? 10.Ke2 Ng3 11.hg3 Qh1 12.Nh3-+) 10.h4 Nd3 (better is 10...c5 11.Qa5 Qa5 12.ba5 Nb4 13.Bb4 cb4-+) 11.Ke2?? (better is 11.Bd3 Qd3 12.Qb2-+) 11...Bb4 (better is 11...Nab4 12.Nh3 Nc2 13.Qa5 Qh4 14.Bg2-+) 12.Qb4 (12.Bb4 Qd4 13.Nh3 Qa1 14.Bc3 Qb1 15.Bg2-+) 12...Ndb4 (12...Nab4 13.Na3-+) 13.Bb4 (13.a3 Nc2 14.Ra2 Nd4 15.Ke1 e5-+) 13...Nb4 14.a3 Qd3 15.Kf2 Qd4 16.Ke1 Qa1 17.ab4 Qb1 18.Kf2 f5 (18...Qb4 19.d4-+) 19.Nh3 a5 (19...fg4 20.Bg2 Qb4 21.fg4 Qd2 22.Kg3-+) 20.Nf4 ab4 (20...Qb4 21.ef5 Qd2 22.Kg3 ef5 23.Be2-+) 21.Bg2 Qc2 22.Rf1 Qd2 23.Kg3 Ra2 24.Ne6 Qg2 (24...g5 25.Ng7 Kf7 26.hg5 Qg2 27.Kf4 Qh2 28.Ke3 Qd2) 25.Kf4-+ Qf1 26.Ng7 Kd7 27.ef5 Rf2 (27...Qc1 28.Kg3 Qe1 29.Kf4 Qd2 30.Ke4 Qd6 31.f4 Re2 32.Kf3 Qd3) 28.f6 Rf3 29.Kg5 Rf8 (29...Rf6 30.Nf5 Rg6 31.Kh5 Qf4 32.Nd6 Qg4) 30.h5 (30.Kh6 R3f6 31.Kh7 Qd3 32.Nf5 R8f7 33.Kg8 Qe4 34.h5 Qe8) 30...R8f6 (30...Qc1 31.Kh4 Qe3 32.g5 Rf4) 31.h6 (31.Ne8 h6 32.Kh4 Qf2) 31...Rg6 32.Kh5 Qh1 (32...Qh3) 0–1. jrich – kpratt, net–chess.com, 2002. (=1.c4 e6 2.b4 d5 3.Bb2 dc4)

4.b5 a6 5.a4 c6 6.ba6 Na6 7.e3 b5 8.Qf3 Bb7 9.ab5 +/– Sander.

4.b5 Nd7 5.g3 (5.e3!?+=) 5...a6-/+ 6.ba6 Ra6 7.Bg2 Ngf6 8.Nf3 Bc5 9.0-0 0-0 10.Nc3 c6 11.a4 (11.Qc2 Re8-/+) 11...b6 (11...Qb6 12.Qc2-/+) 12.Qc2+= Re8 13.Ng5 h6 14.Nge4 Bb7 15.Nd1 Ne4 16.Qe4 Qg5 17.Ne3 Be3 18.fe3 Nc5 Attacking the isolated pawn on a4 19.Qc4 Rea8. Macchiagodena – Kellermann, corr ICCF, 1997.

4.b5 f6 5.e3 Bd7 6.Bc4 Ne7 (6...a6 7.ba6 Na6 8.Nc3=) 7.Qb3 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 c6 11.Be6 Be6 12.Qe6 cb5 13.Nf3 (13.Nc3 Qd7 14.Qd7 Kd7 15.Nb5 Nbc6+-) 13...Nd7 (13...Qd3 14.Nc3 b4 15.Ne4 Qb1 16.Ke2 Qh1 17.Nd6 Kd8 18.Nf7 Ke8 19.Be5+- (19.Nh8?! Qa1 20.Qf7 Kd7 21.Qf8 Nbc6+=)) 14.Nc3 (14.Bd4 Qc7 15.0-0 Qc4+-) 14...Qa5 (better 14...Nc5 15.Qg4 Qd3+=) 15.Bb2?? (15.0-0 Nc5 16.Qg4 b4+-) 15...b4?? (better 15...Nc5 16.Qd6 Nc6-+) 16.Ne4+- Nc5 17.Nd6 Kd8 18.Nf7 (better 18.Qc4 Kd7 19.Nf7+-) 18...Kc7?? (better 18...Ke8 19.Qc4 Nd3 20.Qd3 Kf7+-) 19.Qc4 (19.Qd6 Kc8 20.Nh8 Ng6+-) 19...Rg8 20.0-0 (20.d4 b6 21.dc5 Qc5 22.Qf4 Kd7+-) 20...Nc6 (20...Kb8 21.Ra1 Qc7 22.Bd4+- (22.Qb4?! Nd5 23.Qc4 Qf7+-)) 21.Ra1 Qb6 22.d4 Na6 23.d5 Qc5 24.Qf4 (24.Qd3 Nd8 25.d6 Kc8 26.d7 Kc7+-) 24...Ne5 (24...Bd6 25.Nd6 Qd6+-) 25.Rc1 Qc1 (25...Kb6 26.Rc5 Ng6 27.Qc4 Bc5 28.Bd4+-) 26.Bc1 Bd6 27.Nd6 Kd6 28.e4 (better 28.Ne5 fe5 29.Qf7 Rc8 30.Qe6 Kc7+-) 28...Rf8 (28...Rc8 29.Be3 Re8 30.Ne5 Re5 31.Bd4+-) 29.Nd4 (better 29.Ne5 Ra8 30.Nc4 Kc5+-) 29...g5 (29...Ke7 30.Qf5 Nc5 31.Qh7+-) 30.Nf5 (better 30.Qf5!? Ng6+-) 30...Kd7 31.Qg3 Nc5 32.Qh3 Rf7 (32...h5 33.Ng3 Kc7 34.Qh5+-) 33.Qg3 (33.Qg3 Rf8 34.f4+-) 1–0. GuestLSYV – gddle, freechess.org, 2017.

4.Qc2 Bb4?? 5.Bg7 e5 6.Bh8 +-.

4.Qc2 b5 -/+.

4.e3 Nf6 5.Bc4 Nc6 6.b5= Be7?? (better 6...Nb4=) 7.bc6+- bc6 8.Nc3 0-0 9.g4 (9.Nf3!? a5+-) 9...e5 10.g5 Nd7 (10...Nd5 11.Ne4+-) 11.h4 (better 11.g6 hg6 12.Nf3 Bd6+-) 11...g6?! (11...Nb6 12.Be2 c5+-) 12.Nf3 Bb7 (12...Rb8 13.Qc2+-) 13.d4 (13.Ne4!? Nb6 14.Qc2 Nc4 15.Qc4 c5 16.Ne5 Be4 17.Qe4 Qd6+-) 13...ed4 14.ed4 (14.Qd4 c5 15.Qd1 Rb8+-) 14...c5 15.dc5 Bc5 16.Nd5 Nb6? (better 16...Rb8 17.Rb1 Re8 18.Kf1 c6 19.Nf6 Nf6 20.Qd8 Red8 21.Bf6 Ba6+-) 17.Qc2 (better 17.Nf6 Kh8 18.Be2 Bb4 19.Kf1 Qd1 20.Rd1+- (20.Bd1?! Rfd8 21.Be2 Na4+-)) 17...Nc4?? (17...Bd5 18.Be2 Re8 19.0-0-0-+) 18.Qc4?? (better 18.Nf6 Kh8 19.Ne4 f6 20.Qc4+-) 18...Bd5 (18...Qd5 19.Qd5 Bd5 20.Rh3-+) 19.Qc3 (19.Qc5 Bf3 20.Qc3 Qe8 21.Kf1 Qb5 22.Kg1 f6 23.gf6 Qd5 24.f7 Kf7+-) 19...Bf3?? (better 19...Qe8 20.Kd2 f6 21.gf6 Qb5 (21...Bf2?? 22.f7 Kf7 23.Qf6 Kg8 24.Qg7) 22.f7 Kf7-+) 20.Qg7 1–0. Agiant – Davide87, lichess.org, 2019.

4.e4 Bb4? 5.Bg7 Nf6 6.Bh8 +-.

5.a4 -/+.

5.Qa4 -/+.

5.e5 Nd5 6.a3 Nf4 7.Qc2 (7.d4 a5-/+) 7...Nd3 8.Bd3 cd3 9.Qb3 (9.Qc4 a5-/+) 9...Nc6 (9...c5 10.Nf3-/+) 10.Nf3 Be7 (10...Qd5 11.Qd5 ed5 12.Nc3-/+) 11.0-0 (11.b5 Nb8-/+) 11...a5 (11...Qd5!? 12.Qd5 ed5-/+) 12.b5+= Na7 13.a4 Bc5 (13...b6 14.Nd4=) 14.Nc3 (14.Rc1 b6=) 14...0-0 15.Ne4 Bb6 16.Ng3 (16.Ra3 c6=) 16...Qd7 (16...c6 17.Ba3 Re8 18.bc6 bc6 19.Rab1=) 17.Rfe1 (17.Rac1 Rd8=) 17...Rd8+= 18.Rac1 Kh8 (18...Qd5 19.Rc4 h6 20.Nh5+=) 19.Re4 Qd5 20.Qa3 (20.Rcc4 Bd7+=) 20...Bd7 (better is 20...c5=) 21.Ne1?? (21.Bd4 Rac8 22.Bc5 Bb5 23.Rd4+- (23.ab5? Nb5 24.Qa4 Bc5-+)) 21...c6+= 22.Nd3 (better is 22.bc6!? Bc6 23.Rc3+=) 22...cb5-+ 23.ab5?? (better is 23.Nc5 Bc5 24.Rc5 Qd2 25.Rd4 Qe1 26.Nf1-/+) 23...Nb5 (23...Bb5?! 24.Nc5 Qd2 25.Nf1 Bf1 26.Kf1-+; 23...Qb5?! 24.Nc5-/+) 24.Nf4 Qd2 (24...Qd2 25.Qa1 Bf2 26.Kf1 Be3-+) 0–1. wlittle (2125) – huimre (2065), net–chess.com, 2004.

5.e5 Nd5 6.b5 Bc5 (6...Nf4 7.Qf3 Nd3 8.Bd3 Qd3 9.Qd3 cd3 10.Nh3-/+) 7.Bc4 (7.Qg4 0-0=+) 7...0-0 (better 7...Bf2!? 8.Kf2 Qh4 9.g3 Qc4-+) 8.Nf3= c6 9.a4 cb5 10.ab5 Nd7 11.0-0 N7b6 12.Bb3 (12.Bd3 Nf4 13.Be4=) 12...Ne7 (12...Qe8!?=+) 13.d4 Bb4 14.Qd3 Nbd5 15.Rc1 g6 (15...Ng6 16.Ba3+=) 16.Nc3 Bc3 17.Bc3 (worse 17.Rc3 Nc3 18.Bc3 Nd5=+) 17...Nc3 18.Rc3 Nd5 19.Rc5 b6 20.Rc2?? (20.Bd5!? ed5 21.Rc6+-) 20...Bb7 (better 20...Nb4 21.Qe3 Nc2 22.Bc2 Bb7-/+) 21.Qe3?? (better 21.Bd5 Bd5 22.Nd2+=) 21...Ne3-+ 22.fe3 Bf3 (22...Bf3 23.gf3 Qg5 24.Kf2 Qh6-+) 0–1. AvImd (1715) – walidooooo (1750), lichess.org, 2020.

4.Qb3 Nf6 5.Nf3 Bd7 6.Ne5 dc4 7.Nc4 Be7 8.a3 0-0 9.d4 b5 10.Na5 Qb6 11.Qf3 Re8 12.e4 Na6 13.Nb3 Rad8 (13...Red8 14.Be2+=) 14.N1d2+= Bc8 15.Rc1 Nb8 16.Be2 Bb7 17.Bd3 Nbd7 18.0-0 Ba8 ½–½. Martins,Karin – Sala,Stefano, IECG, 2004.

4.b5 cb5 5.cb5=+ a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Qc1 Bd7?? (better 9...Ne7 10.Nc3 Bd7=) 10.Be5+- Qa7 (10...Qd8 11.Qc7 Qc7 12.Bc7 Bb5 13.Bb8+-) 11.Qc7 1–0. DEFFM – DustCam, freechess.org, 2018.

4.b5 dc4!? 5.a4 a6 6.ba6 Na6-/+ (6...ba6?! 7.Na3=).

4.c5 Nf6 5.Nf3 Be7 6.Nc3 Nbd7 7.Qc2 (7.d4 b6=) 7...b6 8.d4 bc5 9.bc5 Ba6 10.e4 (10.Rb1!?=) 10...Bf1=+ 11.Rf1 de4 12.Ne4 Ne4 13.Qe4 White has a new backward pawn: d4 13...Qc7 (13...Qa5 14.Nd2 Rb8 15.Qc2-/+) 14.Ne5 (better 14.Bc1=+) 14...Nf6?? gives the opponent counterplay (better 14...Ne5 15.de5 Bc5-/+) 15.Qc6+- Qc6 16.Nc6 Kd7 (16...a6 17.Rc1+-) 17.Ne5+- Ke8 18.f3 Nd5 19.Kf2 f6 20.Nc4 Kf7 21.Rfe1 Rab8 22.Ba3 Rhc8 23.Re2 Nf4 24.Re4 Nd3 (24...g5+-) 25.Kg3 (25.Ke2 f5 26.Re3 Nf4 27.Kf2 Nd5+-) 25...f5 (better 25...Rd8 26.Nd6 Bd6 27.cd6 a5+=) 26.Re3?? ignoring the path to victory (better 26.Re2+-) 26...f4 27.Kg4 fe3 (27...fe3 28.Ne3 h5 29.Kh3 Nf4 30.Kg3 Ne2 31.Kh3 Nd4-+; 27...h5 28.Kh5 Rh8 29.Kg4 Rh4) 0–1. AvImd (1760) – escapesmario (1760), lichess.org, 2020.

4.Nf3= dc4 5.e3 (5.Qc2 b5 6.Nc3 a5 7.ba5 Nf6 8.g3 Na6 9.a3 Nc5) 5...Nf6 (5...Nd7 6.Bc4 Ngf6 7.a3 Nb6 8.Be2 a5 9.b5 cb5) 6.Bc4 Bb4 7.Nc3 0-0 8.0-0 Nbd7 9.Qc2 Bd6.

4.Nf3= Nf6 5.c5 (5.Qb3 a5 (5...Na6 6.a3 Be7 7.e3 0-0 8.Nc3 Qb6 9.d4 Ne4) 6.b5 Be7 7.cd5 ed5 8.Nc3 0-0 9.e3 Qd6; 5.a3 dc4 (5...Nbd7 6.cd5 ed5 7.Nc3 Bd6 8.e3 0-0 9.Bd3 Nb6) 6.Nc3 Nbd7 7.e4 a5 8.ba5 b5 9.ab6 Qb6; 5.cd5 ed5 (5...cd5 6.a3 a5 7.ba5 Nc6 8.e3 Ra5 9.Bd3 Be7) 6.a3 a5 7.b5 Bd6 8.Nc3 0-0 9.g3 Bg4) 5...a5 (5...b6 6.d4 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1 Be7) 6.a3 b6 (6...ab4 7.ab4 Ra1 8.Ba1 b6 9.d4 Be7) 7.cb6 (7.d4 ab4 8.ab4 Ra1 9.Ba1 Be7+=) 7...Qb6 (7...ab4 8.ab4 Ra1 9.Ba1 Qb6 10.Bf6 gf6 11.Nc3-/+) 8.Bd4+= Qd8 (8...Qb7 9.b5+= (9.ba5 Ra5) 9...cb5; 8...c5 9.bc5 Bc5) 9.Nc3 (9.b5 cb5 10.e3 Bd7+=) 9...Be7 (9...ab4 10.ab4 Ra1 11.Qa1 Bb4 12.Qb2-/+) 10.e3 (10.b5 0-0=) 10...ab4 11.ab4 Ra1 12.Qa1 Bb4 13.Qa4 Be7 (13...Qa5 14.Qa5 Ba5 15.Bd3+=) 14.Be5 Bd7 15.Qf4 (better is 15.Qa7 0-0 16.Na4+=) 15...Na6?? (better is 15...0-0+=) 16.Ba6+- Qa5 17.Bd3 Qa1 18.Bb1 0-0 19.0-0 Qa5 20.Bc2 Ne8 (20...c5 21.Rb1+-) 21.Rb1 (21.Bb8 Qd8+-) 21...f6 22.Qh4 g6 23.Bg3 (23.Rb7 Qd8 24.Bg3 Nd6+-) 23...Nd6 24.Ne5! Bc8 (24...fe5 25.Qe7 Pinning (25.Qe7 Deflection)) 25.Nc6 Qc7 26.Qa4 Bd8 (26...Kg7 27.Ne7 Qe7+-) 27.Rb8 Bd7 (27...Kg7 28.Rc8! Qc8 29.Bd6+-) 28.Qb4 e5 29.Nd8 (29.Nd8 Nc8 30.Bb3 Rd8 31.Bd5 Kh8 32.f4+-) 1–0. corey – erica, internet, 2011.

4.b5 dc4 5.e3 Bd7 6.Bc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.c4 dc4 6.Bc4).

4.Qc2 Bb4-/+ 5.a3 Bf8 6.g3 b6 7.Bf6 (7.Bg2!?-/+) 7...Qf6-+ (7...gf6?! 8.cd5 ed5 9.Bg2+=) 8.Nf3?? (better is 8.Nc3-+) 8...Qa1 9.Bh3 Qf6 (9...dc4 10.0-0-+) 10.Nc3 (10.cd5 Qg6 11.d3 Bd6 12.de6 Be6-+ (12...fe6?! 13.Bg2 c6 14.Ne5-+)) 10...Bb7 (10...dc4 11.Bg2 Bb7 12.0-0-+) 11.0-0 (11.cd5 Bd5 12.Nd5 ed5-+) 11...Bc5 (11...dc4!? 12.Bg2-+) 12.d4 Bd4 13.Nd4 Qd4 14.cd5 c5 (better is 14...Qe5 15.e4-+) 15.Qa4 (15.Rd1 Qf6 16.Ne4-+) 15...Qa4 16.Na4 Bd5 17.f3 0-0 18.e4 Bc4 19.e5 (19.Rc1 Bb3 20.Nc3 Rd8-+) 19...Bf1 20.Bf1 Nc6 21.g4 (21.f4 Rad8 22.Nb2 Nd4-+) 21...Ne5 22.Kg2 Rfd8 23.Bb5 a6 (better is 23...Rd2 24.Kg3 Ra2 25.Kf4-+) 24.Be2 Rd2 25.Kf2 Rd6 (25...Ra2!? 26.Nc3 Ra3 27.Nb1-+) 26.f4 Nd3 27.Bd3 Rd3 28.Nb6 Rb8 29.Nd7 Rb2 0–1. nimzou (1705) – tomy (2485), net–chess.com, 2013.

4.c5=+ a5 5.a3 =+.

4.c5 Bd7 5.Nf3-/+ a6 (5...a5!? 6.b5 Bb5-/+) 6.d4= Bb5 (6...a5 7.ba5 Nc6 8.e3=) 7.a4 Bd7 8.Nc3 Be7 9.Ne5 (9.b5 0-0+=) 9...Nc6 10.Nc6 (worse is 10.Nd7 Qd7 (worse is 10...Kd7 11.b5 Na5 12.e3+/–; worse is 10...Nd7 11.b5 ab5 12.ab5+=) 11.b5 Na5+=) 10...Bc6 11.b5 Bd7 12.Qc2 (12.e3 0-0+=) 12...a5 (12...ab5!? 13.ab5 Ra1 14.Ba1 c6=) 13.e4 0-0 14.e5 Nh5 15.g3 f5 16.f4 c6 (16...Qe8 17.Be2+=) 17.b6 (17.Be2 g6+/–) 17...g5 18.Be2 g4 19.0-0-0 Ng7 (19...Be8 20.Rdg1+/–) 20.h4 (better is 20.h3!? h5 21.Kb1+/–) 20...Nh5 21.Qd3 Be8 22.Rdf1 h6 (22...Bd7 23.Kc2=) 23.Kc2+= Ng7 24.Rb1 h5? (24...Nh5!?+=) 25.Ba3 Ra6 26.Rb3 Bd7 27.Qd2 Ra8 28.Bb2 Qb8 29.Na2 Ne8? (better is 29...Qd8!?+-) 30.Bc3 Bc8 31.Ba5 Bd8 32.Qb4 (32.Ra3 Bd7+-) 32...Rf7 33.Qd2 Nc7?? (33...Rf8 34.Ra3 Bd7+-) 34.bc7+- Bc7 35.Bc7 Rc7 36.a5 Qa7 37.Ra3 Bd7 38.Rb1 Kf7 39.Rb6 Ke7 (39...Rcc8 40.Nb4+-) 40.Nc3 Kd8 41.Nd1 Bc8 42.Nf2 Qb8 43.Qd3 Ra7 44.Kb3 (44.Qb3!? Ke8+-) 44...Qa8 45.Kb4 Ra6 46.Bg4! hg4 (46...fg4 47.Qg6 Combination; 46...hg4 47.Ra6 Combination) 47.Ng4 fg4 48.Qg6 Re7 49.Qg4 (better is 49.h5 Kc7 50.f5+-) 49...Bd7? (better is 49...Kc7+/–) 50.Qg8?? (better is 50.Qg5!? Be8 51.h5 Bh5 52.Qh5 Kc7+-) 50...Be8? (better is 50...Kc7!? 51.Qg5 Qf8=) 51.h5+- Kc7 (51...Qc8 52.h6 Qd7 53.Ra6 ba6 54.Kc3+-) 52.h6 Bf7 53.Qg5 Qe8?? (better is 53...Rd7 54.f5 Qg8 55.Qg8 Bg8+-) 54.h7 Qd7 (54...Rd7 55.Qf6 Rd8 56.g4+-) 55.Qe7!! Qe7 (55...Qe7 56.h8Q Combination) 56.h8Q Ra7 (56...Qe8 57.Qe8 Be8 58.Ra6 ba6 59.g4+-) 57.g4 Bg6 (57...Be8 58.Rh3 Bd7+-) 58.a6 Be8 59.Rh3 Kd8 60.Rh7 Qd7 (60...Qh7 61.Qh7 Bg6 62.ab7 Rb7 63.Qg8 Kc7 64.Qg7 Kd8 65.Rb7 Bf7 66.Qf7 Kc8 67.Qd7) 61.Rd7 Kd7 62.Qg7 Kd8 (62...Kc8 63.ab7 Kb8 64.Qe7 Ra4 65.Ka4 Bg6 66.Qd6 Ka7 67.b8Q) 63.Rb7 Rb7 64.Qb7 (64.ab7 Bf7 65.Qf8 Kd7 66.b8Q Bg6 67.Qfd6) 64...Bd7 65.Qd7! Kd7 66.a7 Kc7 (66...Kc8 67.a8Q Kc7 68.g5 Kd7 69.g6 Kc7 70.g7 Kd7 71.g8Q Ke7 72.Qad8) 67.a8Q Kd7 68.g5 Ke7 (68...Kc7 69.g6 Kd7 70.g7 Ke7 71.g8Q Kd7 72.Qf7) 69.g6 Kd7 70.g7 Ke7 (70...Kc7 71.g8Q Kd7 72.Qf7) 71.g8Q Kd7 72.Qf7 1–0. Baer,Cy (1895) – Tortoza,Carlos, CiF, 2007.

4.d3 Bb4 5.Nc3?? (5.Nd2 dc4 6.dc4 Nc6-+) 5...c5 (5...d4 6.Qb3 Bc3 7.Bc3 dc3 8.Nf3-+) 6.e3? (6.a3 Ba5 7.cd5 ed5 (7...Nd5?! 8.Rc1-/+) 8.Qa4 Bd7-+) 6...0-0 (6...d4 7.ed4 cd4 8.Qa4 Nc6 9.Nge2-+) 7.g3?? (7.a3 Ba5 8.cd5 Nd5-+) 7...Nc6 (7...d4 8.Qc2-+) 8.Bg2? (8.cd5 Nd5 9.Rc1 e5-+) 8...dc4 (better is 8...d4 9.Qc2-+) 9.dc4 (9.Bc6 bc6 10.dc4 Ba6-+) 9...Qd1 (9...Ne5 10.Qb3 Qd3 11.Nge2-+) 10.Rd1 (10.Kd1 Ng4 11.Bc6 bc6-+) 10...Ne5 11.Nf3 (11.Ba1 Nc4 12.Ke2 a6-+) 11...Nc4 12.Ba1 Bd7 (12...Nd5 13.Rc1-+) 13.0-0 (13.Nd2 Nd2 14.Kd2 Rad8-+) 13...Bc6 14.a3? (14.Nd2 Bg2 15.Kg2 Nd2 16.Rd2 Rfd8-+) 14...Bc3 (14...Ba3!? 15.Nd2 Bg2 16.Kg2 Nd2 17.Rd2-+) 15.Bc3 Rad8 (15...Na3 16.Bf6 gf6 17.Rc1-+) 16.Rd8 (16.Bf6 gf6 17.Rc1 b5-+) 16...Rd8 17.Re1 (17.Bf6 gf6 18.Ra1 b5-+) 17...Ne4 (17...Na3 18.Ra1 Nb5 19.Bf6 gf6 20.Kf1-+) 18.Ba1 (18.Ne5 Nc3 19.Nc4 Bg2 20.Kg2 b5-+) 18...Ncd2 (better is 18...f6!? 19.Rc1-+) 19.Nd2 (19.Ne5 Bb5-+) 19...Rd2 20.Bf3 (20.f3 Nf2 21.Rb1 Nd1-+) 20...Nf2 (20...Ra2 21.Rd1 f6 22.Be4 Be4 23.g4-+) 21.Bc6 Nh3 (21...bc6 22.Rb1 f6 23.Bc3-+) 22.Kf1 (22.Kh1 bc6 23.Rb1-+) 22...Rf2 0–1. BoogieKnight – responsible, caissa.com, 2007.

4.cd5 Qd5 5.Nc3 Qd8 6.b5 Nbd7 7.Nf3 Be7 8.e3 b6 9.d4 a5 10.Be2 Bb7 11.0-0 0-0 12.Ne5 Ne5 13.de5 Ne4 14.Qc2 Nc3 15.Qc3 (15.Bc3 c6+=) 15...Bb4 16.Qc2 Qg5 17.f3 (17.e4 Rac8=) 17...Qe7 (better is 17...Qe3!? 18.Kh1 Rad8-/+) 18.Rad1 Rad8 19.Rd8 Rd8 20.Rc1?? (better is 20.Bd3=) 20...Rd2-+ 21.Qc7 Bd5?? (21...Re2 22.Qb8 Qf8 23.Qb7 Bc5+/–) 22.Qe7+- Be7 23.Rc8 Bf8 24.Ba3 Re2 (24...h6 25.Kf1 Kh7 26.Bf8 Ba2+-) 25.Rf8 1–0. bashful – georgizc, Live Game Caissa's Web, 2004.

4.cd5 Nd5 5.b5 Nd7 6.e4 White threatens to win material: e4xd5 6...N5f6 Black threatens to win material: Nf6xe4 7.Nc3 Be7 8.d4 0-0 9.Nf3 Nb6 10.Bd3 h6 Black has a cramped position 11.0-0 White castles and improves king safety 11...Bd7 12.a4 c6 Black has a cramped position 13.a5 White threatens to win material: a5xb6 13...Nc8 14.Qb3 cb5 15.Nb5 Black has a cramped position (15.Bb5 Bb5 16.Qb5 a6=) 15...a6 Black threatens to win material: a6xb5. (better 15...Bb5!? would keep Black in the game 16.Bb5 Ne4=+) 16.Nc3+- Na7 17.Qb7 Bc6? (17...Nc6 A) 18.Ba6? is no good 18...Rb8 19.e5 Ne8-+ (worse 19...Rb7 20.Bb7 Nh5 21.a6-/+); B) 18.Ne5 Ne5 19.de5+-) 18.Qb3 (better 18.Qa6!? Bb4 19.Rfe1+-) 18...Rb8+- 19.Qc2 Qc7 (19...Bb7 20.Ba3+-) 20.e5 Nd5? (better 20...Ne8!?+-) 21.Nd5+- ed5 22.Rfc1 (22.Ba6 Qd7+-) 22...Qd7 (22...Qb7 23.Ba3 Ba3 24.Ra3+-) 23.Ba3 (23.Ba6!? Bb5 24.Qc7 Qe6 25.Bb5 Rb5 26.Qa7 Rb2+-) 23...Ba3 24.Ra3 Nb5 25.Bb5 (25.Rb3 Bb7+-) 25...Bb5+- 26.Rc3 Rfc8?? the position is going down the drain (better 26...Qe6+-) 27.Rc8+- Rc8 28.Qc8 Qc8 29.Rc8 (29.Rc8 Kh7 30.Rf8+-) 1–0. AvImd (1725) – lennyluna (1745), lichess.org, 2020.

4.e3 Bb4 5.cd5 Nd5 6.Nc3 (6.Bg7 Rg8 7.Bb2 Nc6=) 6...Nc3 (6...0-0 7.Nd5 ed5 8.Qh5-/+) 7.Bc3 Bc3 8.dc3 0-0 9.Qd8 (9.Qc2 Nc6=+) 9...Rd8-/+ 10.Rd1 (10.Nf3 Nc6-/+) 10...Rd1 11.Kd1 Nd7 12.Be2 Nf6 13.Bf3 (13.Ke1 Ne4 14.c4 b6-/+) 13...Rb8 (13...e5 14.Ke1-+) 14.Nh3 (14.Ne2 e5 15.Ng3 Be6-/+) 14...b6 (14...e5!? 15.Ng5-+) 15.Nf4-/+ c5 16.Be2 (16.Kc1 Bb7-/+) 16...Bb7 (16...Ne4 17.Kc2 Nf2 18.Rf1-+) 17.f3 Nd5 (better 17...e5 18.Nd3 e4-+) 18.e4?? (better 18.Nd5 Rd8 19.Kc2 ed5 20.Rd1-/+) 18...Nc3 (better 18...Nf4 19.Bf1 Rd8 20.Kc2 Bc6-+) 19.Kd2 Ne2 20.Ne2 Rd8 21.Ke3 (21.Kc1 b5-+) 21...Ba6 22.h4 (22.Nc1 Kf8-+) 22…Rd3 (22...Rd3 23.Kf4 f6-+) 0–1. Agiant – Gasda_Kayaks, lichess.org, 2019.

5.Qa4 Bd7 6.Qc2 a5 7.cb6 cb6 8.ba5 ba5 9.Nf3 Bd6 10.Be5 Qe7 11.Nc3 0-0 12.Rc1 (12.Bd6 Qd6 13.Rb1 Nc6-/+) 12...Nc6-/+ 13.Bd6 Qd6 14.Nb5 Qe7 15.Qc5 Rfc8 16.Qe7 Ne7 17.Nc3 Ne4 18.Ne5 Be8 19.e3 f6 20.Nd3 e5 21.Ne4 Rc1 22.Nc1 de4 23.Ne2 Bb5 24.Nc3 Bd3 25.f3 Bf1 26.Rf1 ef3 27.Rf3 Rb8 28.d4 ed4 29.ed4 Rd8 30.Rd3 Nd5 31.Nd5 Rd5 32.Kd2 Kf7 33.Kc3 Ke6 34.Kc4 Rg5 (better is 34...Rd8!?+=) 35.Rg3+/– h6?? (better is 35...Rf5 36.Rg7 a4+/–) 36.Rg5+- hg5 37.Kb5 Kd5 (37...g4 38.Kc6 Ke7+-) 38.Ka5 (38.h3 g4 39.hg4 a4 40.Ka4 Kd4+-) 38...f5?? (better is 38...g4 39.a4 f5=) 39.h3+- f4 40.a4 Kd4 41.Kb5 (41...Ke3 42.a5+-) 1–0. MT – guest2857, ICC, 2004.

5.Qc2 bc5 6.bc5 Ne4 =+.

5.Nf3 0-0 6.e3 a5 7.a3 ab4 (7...b6 8.cb6 cb6 9.ba5 Ra5 10.Be2+=) 8.ab4= Ra1 9.Ba1 c6 (9...Nbd7 10.Be2=) 10.Qc2 (10.Bf6 Bf6 11.d4 b6=) 10...b6 (10...Nbd7 11.Bd3=) 11.Ng5 (11.Bd3 Nbd7 12.Ne5 Ne5 (worse is 12...bc5 13.Nc6 Qe8 14.Ne7 Qe7 15.Bf6 Nf6 16.Qc5+/–) 13.Be5 bc5 14.bc5 h6=) 11...g6 12.h4 (12.Nf3 Ba6=) 12...bc5 (12...Nfd7!?+=) 13.h5= h6?? (better is 13...e5 14.hg6 fg6 15.Nh7 Bf5 16.Nf6 Bf6=) 14.hg6+- hg5 (14...Kg7 15.Nf7 Rf7 16.gf7 cb4+-) 15.Bf6 Bf6 16.g7! 1–0. Vojtech,Ladislav – Schuster,Petr, Brno CZE Open–B, 2007.

5.Nf3 0-0 6.e3 b6 7.Nc3 (7.Qc2!?=) 7...bc5-/+ 8.bc5 Bc5 9.Rb1 Bd7 10.Qc2 Be7 11.Ne5 c5 12.Bb5 (12.a3 Bd6 13.Nb5 Bb5 14.Bb5 a6-/+) 12...a6 13.Nd7 Nbd7 (worse is 13...ab5 14.Nf8 Qf8 15.Nb5 Ra2 16.Qb3+=) 14.Be2 c4 15.0-0 Rb8 16.Na4 Qc7 17.d3 Nb6 (better is 17...Bd6!?-/+) 18.Nb6= Rb6 19.dc4 Rfb8 (19...Rc6 20.Qa4 dc4 21.Be5=) 20.Bd4= Rb1 21.Rb1 Rb1 22.Qb1 dc4 23.Qc2 Nd5 24.Qc4 Qc4 25.Bc4 a5 26.e4 Nf6 27.f3 Nd7 28.Kf1 e5 29.Bb2 Bd6 30.Ke2 Kf8 31.Bc3 Bc7 32.Bd2 Ke7 33.Kd3 f6 (33...Nc5!? 34.Kc3 Bb6+=) 34.Bg8+/– h6 35.Kc4 Kd6 36.Kb5 Nb8 37.Be3 Nc6 38.Bc5 Kd7 39.Be6! Ke6 40.Kc6 Bd8 41.a4 g6 (41...f5+-) 42.Bb6 Bb6 43.Kb6 Kd7 44.g4 (worse is 44.Ka5 Kc7 45.Ka6 Kb8+-) 44...g5 (44...Kd8+-) 45.Ka5 Kc6 46.Kb4 Kb6 47.a5 Ka6 48.Ka4 Kb7 49.Kb5 Ka7 50.a6 1–0. pierre – bluewater, internet, 2011.

5.b5 a6 6.a4 (6.e3 Bd6=+) 6...c6 7.e3 Bd7 (7...Bd6 8.bc6 Nc6 9.Nf3=+) 8.Nc3 Bd6 9.Nf3 0-0 10.Be2 Re8 11.0-0 Qe7 12.Qc2 h6 13.d4 Ne4 14.Ne4 de4 15.Ne5 Bf5 16.bc6 Nc6 (16...Be5 17.cb7 Bh2 18.Kh2=) 17.Nc6+= bc6 18.Qc6 Rec8 19.Qd5 Rd8?? (better 19...Qd7 20.g3 Rcb8+=) 20.Qf5+- 1–0. GuestPXSS – GuestPGTN, freechess.org, 2017.

5.b5 c5 6.bc6 bc6 7.Nf3 Bd6 8.e3 0-0 9.Bd3 Nbd7 10.Qc2 Nc5 11.0-0 Nd3 12.Qd3 a5 (12...Rb8 13.Be5+=) 13.Bf6 (13.Rc1!?=) 13...Qf6+= (worse is 13...gf6 14.Rc1 c5 15.Nc3+=) 14.Nc3? (better is 14.Qc3!?+=) 14...Ba6-+ 15.Qd4 Bf1 (15...Qd4 16.Nd4 (worse is 16.ed4 Bf1 17.Kf1 Rfb8-+) 16...Bf1 17.Rf1-+) 16.Qf6-/+ gf6 17.Kf1 Rfb8 18.Nd4 c5 (18...Ra6 19.Nf5 Ba3 20.d4-/+) 19.Ndb5 (19.Nf5 d4 20.Ne4 Bc7=) 19...Be7 (better is 19...Be5!? 20.d4 cd4 (worse is 20...Bh2 21.g3+=) 21.ed4 Bf4+= (worse is 21...Bh2 22.g3+=)) 20.a4 d4 (20...Rd8 21.Nc7 Rab8 22.N7d5=) 21.Nd5+= Bd8 22.ed4 Rb5? (better is 22...cd4!? 23.Re1 Kf8=) 23.ab5+/– cd4 24.Ke2 Rb8 (24...Rc8 25.b6 Rb8+-) 25.Rb1+- a4 26.Kd3 a3 27.Ra1 (27.Kc4 Ba5+-) 27...Ra8? (27...Rb5 28.Kd4 Ra5 29.Ra2+=) 28.Kc2?? (28.Kd4!? Kf8+-) 28...f5? (better is 28...Ra5 29.Kb3 Rb5 30.Kc4 Ra5+=) 29.Kb3+- Ba5? (29...Rb8 30.Kc4 (30.Ka3 Rb5 31.Nf4 Bg5+=) 30...Ra8 31.Kd4+-) 30.d3 (better is 30.Ra3!? Ra7+-) 30...Bc3 (30...Rb8 31.Ra3 Be1 32.b6+-) 31.Ra3 Ra3 32.Ka3 Ba5 33.Ka4 Bd8 34.b6 Bb6 35.Nb6 Kg7 36.Kb4 Kf6 37.Kc4 Ke5 38.Nd5 f4 39.f3 f5 40.h4 h5 41.Nb6 Ke6 42.Kd4 (42.Kd4 Kd6 43.Nd5+-) 1–0. vello2 – MrSpock, Live Game Caissa's Web, 2005.

5.b5 Be6 6.Nf3 Be7 7.d4 0-0 8.e3 Nbd7 (8...a6 9.Nc3=+) 9.Bd3= h6 10.Qc2 Nb6 11.Nbd2 Bb4 12.0-0 Bg4 (12...Rc8 13.Ne5+=) 13.Ne5 Be6 14.Nb3 Bd6 15.Rfc1 Be5 (better 15...Na4!?+=) 16.de5+- Nfd7 17.Qc7 (17.Na5 Qh4+-) 17...Qc7 (better 17...Nc4!? 18.Qd8 Rfd8 19.Bc4 dc4+-) 18.Rc7+- Ne5?? (better 18...Rfc8 19.Rb7 Nc4+-) 19.Be5 Rac8 (19...Nc4 20.Bc4 dc4 21.Nc5+-) 20.Rb7 Nc4 (20...f6 21.Bd4 Rf7 22.Rf7 Kf7 23.a4+-) 21.Bd4 f5 (21...Rb8 22.Ra7 Rb5+-) 22.Rg7 (22.Rg7 Kh8 23.Ra7 Kg8 24.Rg7 Kh8 25.Rg6 Kh7 26.Re6+-) 1–0. AvImd (1715) – Grantthegreat (1655), lichess.org, 2020.

5.Nf3 Bb4 6.Qa4 Qd7?? hands over the advantage to the opponent (better 6...Nc6-/+) 7.Qb4+- c5?! not the bravest move (7...Qf5+-) 8.Qc5 Nc6 9.Bf6 gf6 10.Nc3 b6 (10...Qe7 hardly improves anything 11.Qe7 (11.Qd5?! Nb4 12.Qc4 Nc2 13.Kd1 Na1+-) 11...Ne7 12.Rc1+-) 11.Qb5 (11.Qd5 and White can already relax 11...Bb7+-) 11...Bb7 (11...Ne7 is not the saving move 12.Rc1+-) 12.Nd5 0-0-0 (12...Qd6 cannot undo what has already been done 13.Rd1+-) 13.Nf6 Qd6 14.Ne4 Qd7 15.g3 (better 15.Rc1!? seems even better 15...Kb8+-) 15...Nd4 16.Qc4 Kb8 17.Nd4 Qd4 18.Qd4 Rd4 19.d3 (better 19.f3+- and White has prevailed) 19...f5 20.e3 Rb4 21.Bg2 fe4 22.Be4 Be4 23.de4 Rb2 24.0-0 h5 (24...Re8 25.f3 Rc8 26.Rf2 Rf2 27.Kf2 Rc2 28.Kg1+-) 25.Rfd1 Rf8 26.f4 Re2 27.Re1 Rb2 28.a4 Rg8 29.a5 h4 30.ab6 Rb6 31.Kg2 hg3 32.hg3 Rb2 (32...Rbg6 doesn't get the cat off the tree 33.Kf2 Rg3 34.Reb1 Ka8 35.e5+-) 33.Kf3 Rb3 34.Rab1 Rb1 35.Rb1 Ka8 (35...Kc7 doesn't do any good 36.e5+-) 36.e5 Re8 37.g4 a5 38.Ra1 Ka7 39.Ra5 Kb6 40.Rd5 Kc6 41.Rd6 Kc7 42.e4 Rf8 43.Rd5 White intends f5 43...Kc6 44.f5 Re8 45.Kf4 Rf8 46.e6 Re8 47.Ke5 Rg8 48.e7 Re8 49.f6 Kc7 50.Ke6 Rh8 51.f7 Kc6 (51...Rh3 cannot change destiny 52.e8Q Rh6 53.Ke5 Rh5 54.gh5 Kb7 55.Qb5 Ka8 56.f8Q Ka7 57.Rd7) 52.e8Q Re8 53.fe8Q Kb6 (53...Kc7 is no salvation 54.Qd7 Kb6 55.Rb5 Ka6 56.Qb7) 54.Qd7 (54.Qb5 Kc7 55.Rd7 Kc8 56.Qb7) 54...Ka6 55.Qd6 Kb7 56.Rc5 (56.Rb5 Kc8 57.Rb8) 56...Ka8 57.Rc7 Kb8 58.Qd8 1–0. AvImd (1670) – ak007 (1650), lichess.org, 2020.

4.Nf3 Nf6 5.Nbd2 Bb4 6.a3 Be7 7.g3 0-0 8.Bg2 c5 9.0-0 Nc6 10.Nh4 Bg4 11.h3 Bh5 12.g4 Ng4 (better is 12...Nd7!? 13.Nhf3 Bg6-/+) 13.hg4= Bg4 14.Nhf3 Bf6 15.Bf6 Qf6 (< 15...gf6 16.c4+=) 16.Rb1 b6 17.e4 Ne5 18.ed5 ed5 19.Re1 Nf3 20.Bf3 Bf3 21.Qf3?? (better is 21.Nf3 Rae8 22.d4=+) 21...Qg5-+ (22.Kf1 Qd2-+) 0–1. cccmember – hal1958, HCL–A1505 playchess.de, 2003.

4.g3 Bb4 5.Nd2 Nf6 6.Bg2 0-0 7.h4 Nbd7 8.f3 (8.a3 Bd6-+) 8...c6 (better is 8...e5!? 9.h5 h6-+) 9.g4-/+ Qc7 (better is 9...Bg4 10.fg4 Ng4-/+) 10.Rh3?? (better is 10.gf5 ef5 11.h5=) 10...Ng4 (better is 10...Qb6 11.e3 Bd2 12.Kd2 Qb2-+) 11.fg4-/+ Bg4 12.Re3?? (12.Rh1 Bc5 13.Kf1 Qf4 14.Ndf3 e5-/+) 12...Bd6 (12...Qb6 13.d4 Bd2 14.Qd2 Qb2 15.Qc3 Qc3 16.Rc3-+) 13.Kf1?? (13.Nf1 Bf4-+) 13...Bf4 (better is 13...Qb6 14.Ba3 Ba3-+ (14...Qe3?! 15.Bd6 Rfe8 16.Rb1-+)) 14.Rf3 Bf3 15.Ngf3 Be3 16.Qe1 Qf4 17.Nb3 e5 18.Bc1 d4 19.Be3 de3 20.Bh3 (20.h5 g5 21.hg6 fg6-+) 20...Nf6 21.Kg2 Nh5 22.Nh2 Rad8 23.Nc5 (23.Bg4 Qh6-+) 23...Rd6 24.Ne4 (24.Nf1 Rg6 25.Kh1 Ng3 26.Ng3 Rg3 27.Bg2-+) 24...Rg6 25.Kh1 f5 26.Ng5 h6 27.Nhf3 hg5 28.hg5 e4 29.de4 fe4 30.Nh4 (30.Qh4 Ng3 31.Kh2 Ne2 32.Qf4 Rf4 33.Ne1-+) 30...Rg5 31.Be6 (31.Ng2 Ng3 32.Kg1 Qf2 33.Qf2 ef2 34.Kh2 f1N 35.Rf1 Nf1 36.Kg1 Ne3-+) 31...Kh8 32.Ng2 Qe5 33.Bb3 Rf2 34.Qg1 Ng3 (35.Kh2 Rh5) 0–1. audrey – xplayer, Live Game Caissa's Web, 2004.

4.g3 Nf6 5.a3 a5 6.c3 c5 7.Bg2 ab4 8.cb4 cb4 9.a4 Nc6 10.Qb3 Bc5 11.e3 d4 12.e4 Bg6 13.Ne2 Na5 14.Qc2 Qb6 15.0-0 b3 16.Qd2 Bb4 (16...e5 17.Na3-/+) 17.Qf4 (better is 17.Bd4 Qd4 18.Nd4 Bd2 19.Nd2=) 17...Bc3?? (better is 17...Nc6!?-/+) 18.Bc3 (better is 18.Nbc3 dc3 19.Bc3+/–) 18...dc3=+ 19.Nbc3 b2 (19...Nc6!?=) 20.Rab1 Nb3? (better is 20...0-0+=) 21.Rb2+- Ra4 (21...Nd7+-) 22.Na4 Nh5 (22...Qa7 23.Rb3 0-0 24.Nb6+-) 23.Qb8 (23...Qd8 24.Qd8 Kd8 25.Rb3+-) 1–0. audrey – rychess, Live Game Caissa's Web, 2004.

5.a3 a6 6.Ngf3 c5 7.bc5 Bc5 8.e3 Nbd7 9.Be2 Qc7 10.c4 dc4 11.Nc4 b5 12.Nce5 Ne5 13.Be5 Qe7 14.Qb3 Bd6 15.Bd6 Qd6 16.Qb2 0-0 (Better is 16...Qe7!?=) 17.e4+/– Ne4 18.de4 Be4 19.0-0 Rac8 20.Rac1 Qf4 21.Rfd1 h6 22.Qd2 Qf6 23.Rc8 Rc8 24.Rc1 Rd8 25.Qc3 Qf4 26.Rd1 Rd1 27.Bd1 Bb7 28.Qd2 Qf6 29.Qd4 Qd4 30.Nd4 g5 31.g3 e5 32.Nf5 Kh7 33.Bc2 Ba8 34.Kf1 Kg6 35.Ke2 e4 36.g4 h5 37.h3 hg4 38.hg4 Kf6 39.Ke3 Ke5 40.Ng3 f6 41.Be4 Be4 42.Ne4 a5 43.f3 b4 44.ab4 ab4 45.Nd2 f5 46.gf5 Kf5 47.Nb3 Ke5 48.Nd4 Kd5 49.Kd3?? Ke5= 50.Ne2 Kd5? (Better is 50...b3+=) ½–½. Longorio Yepiz,Filiberto – Ham Rodriguez,Carlos, Pan American–ch Amateur, 2001.

5.a3 c5 6.bc5 Bc5 7.e3 Nc6 8.Ngf3 h6 9.Be2 0-0 10.0-0 Rc8 11.c4 dc4 12.Nc4 b5 13.Nce5 Ne5 14.Ne5 Nd7 15.Qb3 Bd6 16.Nd7 (16.Qb5? Ne5 17.Be5 Rc5-+) 16...Qd7 17.Rfc1 a6 18.e4 Bg6 19.g3 Qa7 20.a4 b4 21.a5 Bc5 22.Rf1 Rfd8 23.Rac1 Bd6 24.Kg2 Qb7 25.Rc8 Rc8 26.f4 Rc5 27.Ra1 Bc7 28.Bf3 Qb8 (< 28...Ra5 29.f5 Bh7 30.fe6+-; < 28...Ba5 29.f5 Bh7 30.fe6+/–) 29.Bd4 Ra5 30.Ra5 Ba5 31.Qa4 Qd8 32.Qa1 f6 33.e5 f5 34.Bf2 b3 35.Qb1 Qb8 36.Qb2 Be8 37.d4 Bc3 38.Qb1 Qb5 39.d5 ed5 40.Bd1 b2 41.Bc2 d4 42.Bf5 Bc6 43.Kh3 Qd5 44.Kh4 Bb4 (45.Qd1 Be7 46.Kg4 h5 47.Kh5 Qg2 48.Qb3 Kf8-+) 0–1. Protze,Gunter – Wuttke,Johannes, ML–041 BdF, 2000.

5.c3 Be7 6.Ngf3 0-0 7.Nh4 Bg4 8.h3 Bh5 9.g4 Bg6 10.Bg2 a6 11.Ng6 fg6 12.0-0 Nc6 13.a3 Bd6 14.e3 Ne5 15.Qe2 a5 16.ba5 Ra5 17.c4 dc4 18.d4 Nf7 19.Nc4 (19.Bb7? Rb5-+) 19...Ra7 20.f4 Be7 21.Qd3 Nd6 22.Ne5 Qe8 23.Qb3 Qc8 24.f5 gf5 25.gf5 Kh8 26.fe6 Nfe4 27.Rf8 Bf8?? (27...Qf8 28.Qc2 Ng3+-) 28.Be4 Ne4 29.Nf7 Kg8 30.e7! Nd2 (30...Be7 31.Nd6) 1–0. Walther,Manfred (1890) – Erbe,Holger (1665), T0003 DESC, 2000.

4.b5 a6 5.a4 (5.ba6 A) 5...Ra6 6.Nd2 (6.Nf3 Rb6 7.Qc1 Bb4 8.Nbd2-/+) 6...Nc6 7.Ngf3 Ba3 8.Ba3-/+; B) 5...Na6 6.e3 (6.Nf3 Bd6 7.e3 Qe7 8.Nbd2-/+) 6...Bd6 7.Nf3 Qe7 8.Be2-/+) 5...ab5 (5...Bd6 6.Nf3 (6.e3 e5 7.Nf3 ab5 8.ab5+=) 6...ab5 7.ab5 Ra1 8.Ba1+=; 5...Bd7 6.e4 (6.c4 Bb4 7.Nd2 dc4 8.dc4-/+) 6...de4 7.de4 Ne4 8.Bd3-/+) 6.ab5 Ra1 7.Ba1 c6 (7...Bd6 8.Nf3+=) 8.bc6 (8.Nf3+=) 8...bc6 9.Nf3 Nbd7 10.Nbd2 Be7 11.e3 0-0 12.Be2 Qc7 13.0-0 c5 14.c4 Bb7 15.Qc2 Rc8 16.Rb1 Bd6 17.h3 Bc6 18.Bc3 e5 19.cd5 Bd5 20.e4 Ba8 (20...Bc6!?+=) 21.Nc4+/– Re8 22.Qb2 h6 23.Bd1 Nh7 24.Ba4 Rb8 25.Qc2 Rb1 26.Qb1 Nhf8 27.Qb5 f6? 28.Nh4 Qb8 29.Nf5 Qb5+/– 30.Bb5 Bc7 31.Nce3 Kh7 32.Ne7 g6 33.N3d5 Bd6 34.Bc6 ½–½. Wilczewski,Piotr (1905) – Salamon,Jan (1820), 47. Miedzynarodowy Festiwal Szachowy Polanica Zdroj Poland, 2011.

4.b5 Bb4 5.Nd2 A) 5...a6 6.ba6 (6.a4 ab5 7.ab5 Ra1 8.Ba1-/+) 6...Ra6 7.Ngf3 0-0 8.e3+=; B) 5...c6 6.bc6 (6.e3 cb5 7.Be2 0-0 8.Ngf3-/+) 6...Nc6 7.e3 0-0 8.Ngf3+=; C) 5...0-0 6.Ngf3 (6.e3 c6 7.bc6 Nc6 8.Ngf3+=) 6...c6 7.bc6 Nc6 8.e3+=.

4.b5 c5 A) 5.Qd2 A1) 5...a6 6.a4 (6.Na3 Bd7 7.ba6 b5 8.Nf3-/+) 6...Nbd7 7.e3 ab5 8.ab5+=; A2) 5...Bd6 6.g3 (6.Nf3 0-0 7.e3 Qc7 8.Be2-/+) 6...0-0 7.Nf3 a6 8.a4+=; A3) 5...Nbd7 6.Nf3 (6.e3 Bd6 7.Be2 Qc7 8.Nf3-/+) 6...Bd6 7.e3 Qc7 8.Be2-/+; B) 5.a4 B1) 5...Bd6 6.Nf3 (6.e3 0-0 7.Nf3 Qc7 8.a5+=) 6...e5 7.e3 Qc7 8.c4+=; B2) 5...Be7 6.Nf3 (6.e3 0-0 7.Nf3 Qc7 8.Be2+=) 6...0-0 7.e3 d4 8.ed4=; B3) 5...Nbd7 6.e3 (6.Nf3 Bd6 7.e3 0-0 8.Be2+=) 6...Bd6 7.Nf3 0-0 8.Be2+=; C) 5.Nd2 Qa5 6.c4 (6.a4 Bd6 7.e3 0-0 8.Ngf3+=) 6...Bd6 7.e3 d4 8.Nh3+=.

4.b5 Bd6 A) 5.Nf3 A1) 5...c6 6.e4 (6.Nbd2 0-0 7.e4 e5 8.bc6-/+) 6...de4 7.de4 Ne4 8.Bg7-/+; A2) 5...0-0 6.e3 (6.a4 c6 7.e3 Re8 8.Be2-/+) 6...c6 7.a4 Re8 8.Be2-/+; B) 5.e3 B1) 5...c6 6.c4 (6.a4 0-0 7.Nf3 Re8 8.Be2-/+) 6...cb5 7.cb5 0-0 8.Nf3+=; B2) 5...c5 6.a4 (6.Qd2 0-0 7.Nf3 Qc7 8.Be2-/+) 6...0-0 7.Nf3 e5 8.Be2+=; B3) 5...0-0 6.Be2 (6.Nf3 c6 7.a4 Re8 8.Be2-/+) 6...a6 7.a4 ab5 8.ab5-/+.

4.b5 Nbd7 A) 5.e3 A1) 5...e5 6.Nf3 (6.Be2 Bd6 7.Nf3 a6 8.a4+=) 6...Bd6 7.Be2 a6 8.a4+=; A2) 5...Bd6 6.Nf3 (6.Be2 c6 7.c4 0-0 8.cd5+=) 6...0-0 7.Be2 c6 8.bc6+=; A3) 5...a6 6.ba6 (6.a4 ab5 7.ab5 Ra1 8.Ba1+=) 6...Ra6 7.Nf3 Bd6 8.Be2+=; B) 5.Nf3 B1) 5...Bd6 6.e3 (6.a4 c6 7.e3 cb5 8.ab5-/+) 6...0-0 7.Be2 e5 8.0-0+=; B2) 5...Bb4 6.Nbd2 a6 7.ba6 Ra6 8.e3+=; B3) 5...a6 6.ba6 (6.a4 ab5 7.ab5 Ra1 8.Ba1+=) 6...Ra6 7.e3 Rb6 8.Bd4+=; C) 5.Nd2 C1) 5...Bd6 6.Ngf3 (6.e3 a6 7.a4 c6 8.Ngf3+=) 6...a6 7.a4 e5 8.e3+=; C2) 5...Bb4 6.e3 (6.Ngf3 a6 7.ba6 Ra6 8.e3+=) 6...a6 7.ba6 Ra6 8.Ngf3+=; C3) 5...a6 6.a4 (6.ba6 Ra6 7.e3 Ba3 8.Qc1-/+) 6...e5 7.e3 Bd6 8.Ngf3+=.

4.c3 c5 5.bc5 Bc5 6.Nf3 Bd6 7.e3 Nc6 8.Be2 Bd7 9.Kf1 0-0 10.Nbd2 e5 11.c4 e4 12.Nd4 Nd4 13.ed4 ed3 14.Bd3 dc4 15.Bc4 a6 16.Bb3 Bb5 17.Nc4 Bc4 18.Bc4 Rc8 19.Bb3 Qb6 20.g3 Ne4 21.Kg2 Qc6 22.f3 Ng5 23.Rf1 Bb4 24.Rf2 Rfd8 25.d5 Qb5 26.Qd4 f6 27.d6 Kh8 28.Rd1 Bc5 29.Qg4 Bf2 30.Kf2 Ne4 31.Qe4 Qg5 32.Qg4 Qg4 33.fg4 Rc2 34.Rd2 Rb2 35.Rb2 Rd6 36.Rd2 Rd8 37.Rd8 1-0. thisisdhaas (2105) - osipov (2060), Rated Bullet game, lichess.org.

4.c4 Bb4-+ 5.Nc3?? (better 5.Nd2-+) 5...d4 6.a3 (6.Qb3 c5-+) 6...Bc3 7.Bc3 dc3 8.Qb3 Nc6 9.g3 (9.Nf3 0-0-+) 9...Bd7 (9...Ne4 10.e3-+) 10.Bg2 0-0 11.Nf3 Qe7 12.0-0 e5 13.Rac1 (13.Qc3 Rfd8-+) 13...Nd4 14.Rc3 (14.Nd4 ed4 15.Qb7 c6-+ (worse 15...Qa3 16.Qc7 Rad8 17.Ra1-+)) 14...Nf3 (better 14...Nb3 15.Rb3 Bc6-+) 15.Bf3 Bc6 (15...Rab8 16.Qb2-+) 16.e4 (16.Bc6 bc6 17.Rb1 e4-+) 16...h5 (16...Rfd8 17.Qb4 Qb4 18.ab4-+) 17.Rcc1 Ng4 18.h3 f5 (18...Nf6 19.Rfd1-+) 19.Kg2?? (better 19.hg4 fg4 20.c5 Kh7 21.Be2-/+) 19...fe4 (19...Nh6!? 20.c5 Kh8 21.Qa2-+) 20.Be4 Be4 21.de4 Nf6 22.c5 Kh8 23.Qb2 (23.Qb7 Rad8-+) 23...Ne4 24.g4 (24.Qb7 Ng5 25.Qc6-+) 24...hg4 25.hg4 Rad8 (25...Qg5 26.f3 Rad8 27.Rcd1 Rd1 28.Rd1 Rf3 29.Rh1 Kg8 30.Kf3 Qf4 31.Kg2 Qg4 32.Kf1 Ng3 33.Ke1 Qe4 34.Kf2 Nh1 35.Kg1 Qd4 36.Qd4 ed4 37.Kg2-+) 26.Rh1 (26.Qb3 Rf2! 27.Rf2 Nf2-+) 26...Kg8 27.Rcf1 (27.Qb3 Rf7 28.Rc2 Nc5-+) 27...Qf7 28.Qb7 (28.Qe2 Rd2 29.Qe4 Rf2 30.Kg3 Qf3 31.Qf3 R8f3 (31...R2f3?? 32.Rf3 Rd8 33.Rb1+-) 32.Kh4 Rf1-+) 28...Rd2 (28...Qf3 29.Kh2 Qf4 30.Kg1 Qg4 31.Kh2 Rf2 32.Rf2 Qg3) 29.Qe4-+ Rf2 30.Rf2 (30.Kg3 Qf3 31.Qf3 R8f3 (31...R2f3?? 32.Rf3 Rd8 33.Rb1+-) 32.Kh4 Rf1-+) 30...Qf2 31.Kh3 Rf3 32.Qf3 Qf3 33.Kh2 Qf2 (33...e4 34.a4 e3 35.Ra1-+) 34.Kh3 e4 35.g5 e3 36.Rd1 Qf3 37.Kh4 (37.Kh2 Qd1 38.Kg3 e2 39.Kf4 Qd4 40.Kf5 e1Q 41.Kg6 Qee4 42.Kh5 Qd1) 37...Qd1 38.Kg3 Qf3 (38...e2 39.Kg4 e1Q 40.Kf5 Qf3 41.Kg6 Qee4) 39.Kf3-+ g6 (39...Kf7 40.Ke3 Ke6 41.Ke4-+) 40.Ke3 Kf7 41.Kf4? (better 41.c6 Ke6 42.Ke4-/+) 41...Ke6-+ 42.Kg4 (42.c6 Kd5 43.a4-+) 42...Kd5 43.Kf4 Kc5 (better 43...c6 44.Ke3 Kc5-+) 44.Ke5=+ Kc4 (better 44...Kb5!? 45.Kf6 c5 46.Kg6 c4=+) 45.Kf6+= Kb3?? (better 45...c5 46.Kg6 Kd3+=) 46.Kg6+- c5 47.Kf7 (better 47.Kf5 c4 48.g6+-) 47...c4= 48.Ke6?? (better 48.g6 c3 49.g7=) 48...c3-+ (48...Ka3?! 49.g6 c3 50.g7=) 49.Kd5 (49.g6 c2-+) 49...c2 50.g6 c1Q 51.g7 (51.Ke6 Qc8 52.Kf7 Qf5 53.Kg7 a5-+) 51...Qg1 52.g8Q Qg8 53.Kc6 Ka3 54.Kb7 Qf7 55.Ka6 Qc4 (55...Qc7 56.Kb5 Kb3 57.Ka6 Qb6) 56.Ka7 Qb4 57.Ka8 (57.Ka6 Ka4 58.Ka7 Kb5 59.Kb7 Qe7 60.Kc8 Kc6 61.Kb8 Qb7) 57...Kb3 58.Ka7 Kc4 59.Ka8 Kc5 60.Ka7 Kc6 61.Ka6 Qb7 (61...Qb6) 62.Ka5 Qb5 0–1. Agiant – galtsev (1840), lichess.org, 2019.

4.e4 de4 5.Nc3 Bg4 6.Be2 Be2 7.Qe2 e5 8.de4 Bb4 9.Nf3 Nc6 10.Ng5 0-0 11.0-0 Bc5 12.Nd5 Nd5 13.ed5 Qd5 14.Rad1 Nd4 15.Bd4 ed4 16.Qh5 Qf5 17.g4 Qc2?? (Better is 17...Qg6-+) 18.Rc1+/– Qa2?? (Better is 18...Qg6 19.Qg6 hg6 20.Rc5 c6+/–) 19.Qh7# (19.Rc5?! h6 20.Nf3 Rad8+=) 1–0. TD_6 – babylyub, ICS rated blitz match, 1998.

4.h3 Be7 5.a3 Bd7 6.g4 0-0 7.Bg2 Bc6 8.Nd2 Nfd7 9.c3 Bf6 10.d4 Nb6 11.Ngf3 Nc4 12.Nc4 dc4 13.0-0 Bf3 14.Bf3 c6 15.b5 Qc7 16.a4 Nd7 17.e4 Rfd8 18.e5?? Ne5!-/+ 19.Be2 cb5 20.ab5 Qb6 21.Qa4 Ng6 22.Bc4 Nf4 23.Kh2 Qc7-+ 24.Kg3?? Nd3 25.f4 Nb2 26.Qb3 Nc4 27.Rad1 Ne3 28.Rde1 Nf1 29.Rf1 a5 30.g5 a4 31.Qa3 Be7 32.Qa2 Bg5 33.h4 Be7 34.Rf3 a3 35.Kg4 Bf6 36.Rd3 Qd7 37.c4 e5 38.f5 e4 39.Ra3 Ra3 40.Qa3 Qd4 41.Qb3 e3 42.Kf3-+ Bh4 43.Qe3 Qe3 44.Ke3 Bf6 45.b6 Rd4 46.c5 Rc4 47.Kd3 Rc5 48.Ke4 Rb5 49.Kf4 Rb6 50.Ke4 Rd6 51.Kf4 b5 52.Ke4 b4 53.Kf4 b3 54.Ke4 b2 55.Kf4 b1Q 56.Ke3 Qe1 57.Kf4 Rd4 58.Kf3 Rd3 59.Kf4 Be5 60.Kg4 Qg3 61.Kh5 g6 62.fg6 Qg6 63.Kh4 Rd4 64.Kh3 Qg3 (64...Qg4) 0–1. cogit – benek25, kurnik, 2012.

4.c3 Be7 5.Nf3 -/+.

4.c3 Bf8 5.Nd2 g6 6.e4 c6 7.Ngf3 Bg7 8.e5 h6 9.Bd3 Nd7 10.0-0 a6 11.Ba3 b6 12.Qc2 Bb7 (12...Ne7 13.c4+=) 13.c4 (13.Bg6 Ne7 14.Bd3 c5+/–) 13...Rc8 14.Nb3 (better is 14.Bg6!? Ne7 15.Bh7+=) 14...dc4+= 15.Bc4 (worse is 15.Qc4 c5 16.dc5 Bf3 (worse is 16...Ne5 17.Ne5 Be5 18.Rae1+=) 17.gf3 b5-/+ (17...Ne5?! 18.Qa6 Nd3 19.Rad1=)) 15...b5?? (15...c5 16.Be6 Bf3 17.Bd7 Kd7 18.dc5 Kc7 19.cb6 Kb8+/– (19...Kb6? 20.Bc5 Kc7 21.gf3 Qg5 22.Kh1+-)) 16.Bd3?? (better is 16.Be6 Ne7 17.Nc5 Nc5 18.Bc8 Qc8 19.Bc5+-) 16...Ne7+= 17.Nc5 Nc5 18.Bc5 (worse is 18.dc5 Nd5-/+) 18...0-0 19.Nh4 Re8 20.a4 Nd5 21.ab5?? (better is 21.Nf3+=) 21...cb5-+ (21...Qh4?! 22.ba6 Ba8 23.a7+=) 22.Rfc1 (22.Bg6 Qh4 (22...fg6?! 23.Ng6 b4 24.h4-+) 23.Bh7 Kh8-+) 22...Nf4 (22...Nb4! 23.Qd2 Nd3 24.Qd3 Qh4 25.Qe3-+) 23.Be4 Be4 (23...Qh4 24.Bb7 Rc5 25.dc5 Be5 26.g3= (26.Ra6? Ne2 27.Kf1 Nc1 28.Qc1 Qh2-+)) 24.Qe4 Nh5 (better is 24...Qh4 25.Kh1 Qg5-+ (25...Qf2?! 26.Rc2 Nh3 27.gh3-+)) 25.g4?? (better is 25.Nf3+=) 25...Qd5?? (better is 25...Qh4 26.Qf3 Red8-+) 26.Qd5+- ed5 27.gh5 Ra8 (27...gh5 28.Ra6 Bf8 29.Nf5+-) 28.hg6 fg6 (28...a5 29.Bd6 Bf8 30.gf7 Kf7 31.Rc7 Kg8 32.Ra3+-) 29.Ng6 Kh7 30.Nf4 a5 31.Nd5 a4 (31...Be5 32.de5 Re5+-) 32.Nc7 1–0. ghorn (2205) – beammeupscotty (2145), net–chess.com, 2014.

4.Nc3 Nf6 5.e3 Ne4 6.Qd3 (6.Nge2 Qh4 7.g3 Qf6-+) 6...0-0 (6...c5 7.Nge2 Qh4 8.g3-+) 7.Be2 (7.a3 Ba5-+) 7...Qg5 (7...c5 8.Bf3 c4 9.Qd1-+) 8.g3? (8.Bf3 f5-/+) 8...Qf6 (8...Qf5 9.0-0-0 Bc3 10.Bc3 Nf2 11.Qf5 ef5 12.Nf3-+) 9.Nf3 (9.f3 Nd6-+) 9...Nd7 (9...c5 10.dc5 Nc6-+) 10.0-0-0?? (better is 10.a3 Ba5 11.0-0 Bc3 12.Bc3-+) 10...Bc3 (10...Nf2!? 11.Qd2-+) 11.Bc3 Nf2 (12.Qd2 Nh1 13.Rh1 Qe7-+) 0–1. PoPer – Checkmates, Live Game Caissa's Web, 2004.

5.Ba3 Nf6 -/+.

5.e3 c5 6.Nd2 b6 7.dc5 Bc5 8.Bb5 Bd7 9.Bd7 Qd7 (9...Kd7?! 10.c4 Nf6 11.cd5 Nd5 12.Qg4=; 9...Nd7?! 10.c4 Ngf6 11.cd5 Nd5 12.Ngf3-/+) 10.Ngf3 Nc6 11.0-0 b5 (11...Nge7!?-/+) 12.a4 (12.c4!? f6 13.cb5+=) 12...ba4+= 13.Ra4 Nce7 14.Ne5 Qc7 15.c4 Rb8 (15...f6 16.Nef3 Nh6+=) 16.Qb1 (better is 16.Nd3!? Nf6 17.Bf6 gf6 18.cd5+=) 16...f6 17.Nd3 Nf5 (better is 17...Bd6!? 18.h3 Nc6+=) 18.cd5+= ed5?? (better is 18...Bd6+=) 19.Rc1+- (19.Nc5?! Qc5 20.Rc1 Qb5 21.Ra7 Qb6+/–) 19...Rb5 20.e4 (20.Nc5!? Rc5 21.Rc5 Qc5 22.Qf5 Ne7+-) 20...Nfh6? (better is 20...Nd6+/–) 21.ed5+- Ne7 22.Ne4 (22.Nc5 Rc5 23.Rc5 Qc5+-) 22...Qb6 (22...Bf2 23.Ndf2 (23.Kf2 Ng4 24.Kf3 Qb6 25.Kg4 f5 26.Kf3 fe4 27.Re4 0-0 28.Ke2 Nd5=) 23...Qb8 24.Nd3+-) 23.Ndc5 (better is 23.Nec5 a5+-) 23...Nd5?? (23...Rb2 24.Qa1 f5 25.Ra6 (worse is 25.Ra7 0-0 26.Rb7 Qb7 27.Nb7 Rb7+-) 25...fe4 26.Rb6 Rb6 27.Qa7+-) 24.Re1 (better is 24.Qd3 0-0 25.Qd5 Nf7+-) 24...0-0 25.Ra6 Qb8 26.Nd7 Rb2 27.Nb8 Rb1 28.Rb1 f5 29.Nd2 Rf7 30.Nc6 g5 31.Ne5 Re7 32.Ndc4 Nf7 33.Nf7 Kf7 34.Nd6 Kg6 35.Nc8 Kf7 36.Nd6 Ke6?? 37.Re1 Kd7 38.Rd1 Nc3 39.Nf5 Ke8 40.Ne7 Nd1 41.Ra7 Nc3 42.Nf5 Nb5 43.Rh7 Kf8 44.g4 Kg8 45.Rd7 Kf8 46.h4 gh4 47.g5 h3 48.g6 Ke8 49.Rb7 Nc3 50.g7 Ne4 51.g8Q 1–0. Mark72 – dunk0104, ChessWorld.net, 2012.

5.e3 Nf6 6.Nf3 Nc6 7.Nbd2 e5 8.de5 Be5 (8...Ne5 9.c4 Nc4 10.Bc4 dc4 11.Nc4 Bb4 12.Ncd2-/+) 9.Qa4 (9.Ne5 Ne5 10.c4 Qe7=+) 9...Bd7 (9...0-0 10.Ne5 Ne5 11.c4-/+) 10.Bb5 (10.Ne5 Ne5 11.Qd4 Nc6-/+) 10...Bd6 11.Nd4 Ne4?? (better 11...Ne5 12.0-0 a6 13.Bd7 Qd7-/+ (worse 13...Nfd7 14.Nf5=+)) 12.Ne4+/- Nd4?? (better 12...de4 13.Nc6 bc6 14.Qe4 Kf8 15.Bc6 Rb8 16.Bd7 Rb2+/-) 13.Nd6+- (13.Qd4 A) worse 13...Bb5 14.Qg7 (14.Nd6?! Qd6 15.Qg7 0-0-0=) 14...Kd7 15.Nd6 Kd6 16.Qf7+/-; B) 13...de4 14.Qe4 Qe7 15.Bd7 Kd7 16.Qg4 Qe6 17.Qg7 Rhg8 18.Qh7 Rg2=) 13...cd6 14.ed4 (14.Bd7 Qd7 15.Qd4 Qb5+-) 14...Qe7 (14...a6 15.Bd7 Qd7 16.Qd7 Kd7 17.a4+-) 15.Kd2 Qg5 16.Kc2 Bb5 (16...Qf5 17.Kb3+-) 17.Qb5 Kf8 18.g3 (18.Qb7 Qf5 19.Kb3 Rc8+-) 18...Re8 (18...Qf5 19.Kb3 g6 20.Ba3+- (20.Qb7 Kg7 21.g4 Qd3-/+)) 19.Rhf1 (19.Rae1 Qf5 20.Kc1 Re1 21.Re1 g6+-) 19...g6 (19...Qf5 20.Kd2+-) 20.Qb4 (better 20.Rae1!? Re1 21.Re1 Qf5 22.Kd2 b6+-) 20...Re2 21.Kb3 Kg7 22.Qb7 (22.Qd6 Qd2 23.Rab1 Qc2 24.Ka3 Re6-+) 22...Qd2 23.Rab1 Qc2 24.Ka3 Qd3 25.Qa7?? (better 25.Rfd1 Qc4 26.Qb3+- (26.Qa7 Re7 27.Qa5 Ree8-+)) 25...Ree8-+ 26.Rfd1?? (26.Rbd1 Qb5 27.c4 Qc4 28.Rc1 Qd3 29.Rc3 Qf1 30.Rc7 Qf2 31.Kb3 Rb8 32.Rb7-+) 26…Qc4 (26...Qc4 27.Ba1 Ra8-+) 0-1. rama66 - rajasri231, Rated Classical game, lichess.org, 2013.

5.g3 Nf6-+ 6.f3 (6.Ba3 Ba3 7.Na3 c5-+) 6...0-0 7.e3 Nbd7 (7...e5 8.Ba3 Re8 9.Qb3-+) 8.g4 (8.c4 c5-+) 8...h6 (8...c5 9.g5 Ne8 10.Nh3-+) 9.Nd2 (9.h4 Bg3 10.Kd2 Ne8-+) 9...c5 (9...e5 10.de5 Ne5 11.h4-+) 10.Bb5 (10.f4 c4-+) 10...a6 11.Bd7 Bd7 12.a3 (12.Ba3 b6-+) 12...cd4 (12...b5 13.a4-+) 13.ed4 (13.cd4 Rc8-+) 13...Nh7 (13...b5 14.a4-+) 14.Qc2 (14.Qe2 b5-+) 14...Rc8 15.0-0-0 (15.a4 Qh4 16.Kd1 Qf2-+) 15...Qa5 16.Nb3 Qb6 17.Rd3 (17.Nd2-+) 17...Ba4 18.c4 (18.Ne2 Bb3 19.Qd2 Qa5-+) 18...dc4 19.Rd1 (19.Rc3 Bb3 20.Qg2 Nf6-+) 19...Bb3 (better is 19...cb3 20.Qc8 Rc8 21.Kb1-+) 20.Qc3 Bd1 (20...Nf6!? 21.d5 Bf4 22.Rd2-+) 21.Kd1 f6 (21...Nf6!? 22.Bc1-+) 22.Ne2 (22.Ke1 e5 23.d5 Qc5-+) 22...Ng5 23.Kd2 (23.Rf1 Bh2 24.Ke1 Bd6-+) 23...e5 (23...Nf3 24.Qf3 Qb2 25.Ke1 Ba3 26.Qe4-+) 24.h4 (24.Kc1 Rfd8 25.Rd1 ed4 26.Rd4 Qc6-+) 24...ed4 25.Nd4 Nf7 (better is 25...Be5 26.Qb4 c3 27.Bc3 Nf3 28.Ke2 Qb4 29.ab4 Bd4 30.Ba1 Ng1 31.Kd3-+) 26.Re1 Be5 27.Re4 (27.Ke2 Rfd8 28.Rd1 Rd7-+) 27...Rfd8 (27...Nd6 28.Re5 fe5 29.Nf5 Qf2 30.Kc1 Nf5 31.gf5 Qf1 32.Kc2 Rf5 33.Bc1 Rf3 34.Be3-+) 28.Ke2 (28.Ke1 Rd7 29.f4 Bd4 30.Rd4 Rcd8 31.Rd7 Qg1 32.Ke2 Rd7 33.Qc4 Qg4 34.Ke3 Qh3 35.Ke2 Qg2 36.Ke1 Rd2-+) 28...Bd4 (better is 28...Nd6 29.Re5 fe5 30.Ne6-+) 29.Rd4 Rd4 30.Qd4 Qc5 (better is 30...Qc7 31.f4-+) 31.Ke3 (31.Qc5 Rc5 32.f4 h5-+) 31...Re8 (better is 31...Qc7 32.f4 Rd8 33.Qe4-+) 32.Kd2 (32.Kf2 Qc7 33.f4-+) 32...Rd8 33.Ke3 Rd4 34.Bd4 Qa3 35.Ke4 c3 (35...Qd3 36.Kf4 Qd4 37.Kg3 Qg1 38.Kh3 g5 39.h5 a5 40.f4 gf4 41.g5 Qg3) 36.Bc3 Qc3 37.Kf4 (37.Kd5 Ne5 38.f4 Qc4 39.Kd6 Qc6 40.Ke7 Qd7) 37...g5 (37...Qe5) 38.hg5 (38.Kg3 Qe1 39.Kg2 gh4 40.g5 Qe2 41.Kh3 Qf3 42.Kh2 h3 43.gf6 Qg2) 38...hg5 (38...Qe5) 39.Kg3 b5 (39...Ne5 40.Kh2 Qf3 41.Kg1 Nd3 42.Kh2 Nf4 43.Kg1 Qg2) 40.Kh2 (40.Kg2 Qd2 41.Kg3 Ne5 42.Kh3 Nf3 43.Kg3 Ne1 44.Kh3 Qg2) 40...Qf3 (40...Qc2 41.Kg3 b4 42.Kh3 b3 43.Kg3 b2 44.Kh3 b1Q 45.Kg3 Qe1 46.Kh3 Qh4) 41.Kg1 Qe2 (41...Ne5 42.Kh2 Ng4 43.Kg1 Qf2 44.Kh1 Qf1) 42.Kh1 b4 43.Kg1 b3 44.Kh1 b2 45.Kg1 b1Q 0–1. Jaime532133 – Mr.Oldenslo, ChessWorld.net, 2010.

4.b5 a4 5.Nf3 Bd6?? (better 5...Nf6=) 6.Bg7+- d4 (6...Nf6 7.Bh8 e5 8.Nc3+-) 7.Nd4 (7.ed4 Nh6 8.Bh8 f6+-) 7...Bc5 (7...e5 8.Nf3 e4 9.Nd4+-) 8.Bh8 e5 (8...Nf6 9.Qf3 Nbd7 10.Nc3+-) 9.Be5 Bd4 (9...Nd7 10.Bg3+-) 10.Bd4 c6 (10...Nf6 11.Qf3 Nbd7 12.Be2+-) 11.Qh5 h6 12.Bc4 cb5 (12...Qe7+-) 13.Qf7 1–0. DEFFM – GuestFTTG, freechess.org, 2018.

4.b5 b6 5.Nf3 Nf6 6.Be2 h5 (6...Bd6 7.0-0=) 7.c4 dc4 8.Bc4 Ne4 (8...Bd6 9.0-0+=) 9.0-0 Qf6?? (better 9...Nd6 10.Be2 c6+-) 10.Bf6+- gf6 1–0. DEFFM – GuestNSLX, freechess.org, 2018.

4.b5 c5 (--> 1.b4 a5 2.b5 c6 3.Bb2 c5 4.e3 e6).

4.b5 Nd7 5.Nf3 Ne5?? (better 5...Ngf6=) 6.Ne5+- Ne7. GuestVBVJ – GuestNJHK, freechess.org, 2017.

5.a4 cb5 6.ab5 Bd7 7.Nf3 b6 8.c4 Nf6. GuestHSHW – GuestHKFP, freechess.org, 2017.

5.a4 b6 6.Nf3 cb5 7.Bb5 Bd7 8.Na3 Bd6?? (better 8...Nf6+=) 9.Bg7+- Ba3 10.Ra3 Bb5 11.ab5 Nf6 12.Bh8 Ke7 (12...Nbd7 13.Nd4+-) 13.Bf6 Kf6 14.Nd4 (14.Qa1 Ke7+-) 14...Kg7 15.Qg4 Kh8 16.Qf4 Qe7 17.Rc3 (better 17.Qe5 f6 18.Qe6 Qe6 19.Ne6+-) 17...f5 (17...Nd7 18.Rc7 f6+-) 18.Qe5 Kg8 19.Nf5! (19.Nf5 ef5 20.Qe7 Na6 21.ba6 Re8 22.Qe8 Kg7 23.Rc7 Kh6 24.Qg8 a4 25.Rh7) 1–0. Pierre – Meckong, internet, 2020.

5.a4 c5 6.c4 dc4 (6...Nf6!?=) 7.Bc4 (7.Na3 c3 8.Bc3 Nf6+-) 7...Nf6 8.Nf3 b6 9.0-0 Be7 10.d4 cd4 11.Bd4 (11.Nd4 Bb7+-) 11...0-0 12.Ng5 (12.Qe2 Nbd7+=) 12...Bb7= 13.Qc2 g6 14.Nd2 Nd5 15.Nge4 Nb4 (15...Nd7 16.Rac1+=) 16.Qc3 (16.Qb2 Nd7+=) 16...Nd7 17.Bg7 Re8 18.Qb2 (18.Bh6 Nf6=) 18...Nd5 (18...f6 19.Bh6 Bd5 20.Bf4=+) 19.Bh6 N5f6 (19...Bf6 20.Nf6 Qf6 21.Qf6 N5f6 22.f3+=) 20.Rac1+= Nc5 21.Nc5 Bc5 22.Rfd1 (better 22.f3 Bf8 23.Bf8 Rf8 24.Rfd1+=) 22...Be7? (better 22...Qe7 23.Bg5 e5=) 23.Ne4! Qd1?? (23...Be4 24.Rd8 Discovered attack; 23...Ne4 24.Qg7) 24.Rd1 Be4 25.f3 Bb7 (25...Rac8 26.Rd7 A) 26...Rc4?? A1) 27.fe4?! e5 28.Rd1 Rc5= (worse 28...Ne4 29.Qe5 Nf6 30.Rf1+-; worse 28...Re4 29.Rf1 Ng4 30.Qc2 Ra4 31.Qa4 Nh6 32.Kf2+-; 28...Ra4 29.Qc2 Rb4 30.Qc6+-); A2) 27.Re7 Rc1 28.Qc1 Re7 29.Bg5+-; B) 26...Nh5+-) 26.Rd7 Bf8 (26...Nh5 27.Rb7 Bf6+-) 27.Qf6 Bh6 (27...Re7 28.Re7 Bh6 29.Qf7 Kh8 30.Qh7) 1–0. DEFFM – GuestNWKM, freechess.org, 2019.

5.a4 Nd7 6.Nf3 Ngf6 7.d4 c5 8.c4 cd4 9.ed4 dc4 10.Bc4 Nb6 11.Bd3 Nbd5 12.0-0 b6 13.Ne5 Bb7 14.Nd2 Bd6 15.Ndc4 Bc7 16.Qf3 0-0 17.Ba3 Re8 18.Rfe1 Rb8 19.Be4 Ne4? (better 19...Rc8=) 20.Qf7+- (20.Re4? Nf6 21.Nc6 Qd5-+) 20...Kh8 21.Re4 Nb4? (better 21...Nf6 22.Rh4 Be5 23.Ne5 Be4+-) 22.Rg4 Be5 23.Ne5 (worse 23.de5 Re7 24.Qf4 Kg8 25.Bb4 ab4+-) 23...Qf6 (23...Qe7 24.Qh5 Kg8+-) 24.Qf6 gf6 (24...Re7 25.Qe7 g6 26.Nf7 Kg7 27.Nh6 Kh6 28.Rh4) 25.Nf7 1–0. GuestJQYD – Crestfall, freechess.org, 2018.

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

5.a4 c6 6.Ke2 (better 6.Nf3=) 6...cb5-/+ 7.Kd3 (7.Ke1 ba4 8.Nc3 Nf6-/+) 7...Nc6 8.ab5 (better 8.Ke2-+) 8...Bc5?? (better 8...Qb6 9.Na3 Na7-+) 9.bc6+- Bc6 (9...d4 10.cd7 Qd7+-) 10.Ke2 (better 10.Bg7 Bb5 11.c4 Bc4 12.Kc2 Qh4 13.Bh8 Qf2+-) 10...Qb6?? (better 10...Nf6+-) 11.d3 (better 11.Bg7 d4 12.Qc1 Bb5 13.Ke1 Bf1 14.Kf1 (14.Bh8 Bg2 15.Ne2 Bh1=+) 14...de3 15.fe3+-) 11...Qb2-+ 12.Nd2 Qf6 13.Nb3 (13.d4 Bb4 14.Ke1-+) 13...Bd6 (13...Bb4 14.Nf3-+) 14.f4? (14.Ra5 Ra5 15.Na5 Ne7-/+) 14...Nh6 (14...a4 15.Nd4-+) 15.Nf3 (better 15.Ra5!? Ra5 16.Na5-/+) 15...a4-+ 16.Nbd4 Ke7 (16...0-0 17.c3-+) 17.Qb1 (17.Ra2 Rhc8-+) 17...Rhb8 18.h3 Nf5 19.Nf5 Qf5 20.g4 Qf6 21.d4 b5 (21...Kf8 22.Kd1-+) 22.Ne5-/+ Be5 23.de5 (23.fe5 Qh4 24.Qb4 Ke8-+) 23...Qh4 24.Kd3 (better 24.Qb4 Ke8 25.Bg2-+) 24...Qf2 (24...d4!? 25.Qb4 Ke8 26.Rh2-+) 25.Kd4 (25.Kd4 Qd2 26.Bd3-+). FeegLood (1945) – Elcodes (1895), lichess.org, 2015.

5.a4 Nf6 6.Nf3 c6 7.c4 dc4 8.Bc4 cb5 9.ab5 b6 10.Ne5 Bb4 11.Qf3 Ra7 12.0-0 0-0 13.d4 Rc7 14.Rc1 Qe7 15.Nc3 Rfc8 16.Na4 (16.Nd7? Nbd7 (16...Qd7?! 17.Na4 Rc4 18.Rc4 Rc4 19.Nb6 Qb5 20.Nc4 Qc4 21.Rc1-/+) 17.Nd5 Nd5 18.Bd5 ed5 19.Qd5 Nf6-+) 16...Nd5? (better 16...Qd6+=) 17.Bd5+- Rc1 18.Bc1 ed5 19.Nb6 (19.Qd5?! Be6 20.Qe4 Qc7+=; 19.Nd7?! Nd7 20.Qd5 Qe6 21.Qe6 fe6+/-) 19...Rc2 20.Nd5 (20.Nbd7?! Nd7 21.Qd1 Rc7+-; 20.Qd5 Be6 21.Qf3 Qc7=) 20...Qe6 21.Nb4 ab4 22.Qa8 (worse 22.Nd7 Qd7 23.Qh5 g6+/-) 22...Rc8 23.b6! Bc6 (23...Qb6 24.Nd7 Decoy) 24.b7 (worse 24.Nc6 Qc6 25.Bd2 Qb6+-) 24...Re8 (24...Rf8 25.Nc6 Qc6 26.Bd2+-) 25.Nc6 Qc6 26.Qa7 (26.Qa4 Qe6+-) 26...h6? (better 26...Qc3 27.g3 b3+-) 27.Qa4 Qa4 (27...Re6 28.Qb4 Rg6 29.e4+-) 28.Ra4 Kh7 (28...b3 29.Rb4+-) 29.Rb4 Re7 (29...Rd8 30.Ba3+-) 30.d5 Rc7 31.Bb2 Rc2 (31...f6 32.f4+-) 32.d6 (better 32.g4 f6+-) 32...Rd2 33.Kf1 f6 (33...Rd6 34.Be5 Rd8+-) 34.Bd4 Rc2 35.Ba7 (35.Ba7 Nd7 36.b8Q Nb8 37.Rb8 Rc1 38.Ke2 Rc2 39.Kf3+-) 1-0. onur604 (2320) - ksangod (2230), Casual Rapid game, lichess.org, 2021.

4.a3 c5 5.Nf3 Nf6= 6.Rg1 (better 6.bc5!? Bc5 7.c4=) 6...cb4-/+ 7.ab4 Bb4 8.g4 h6 (better 8...0-0!?-/+) 9.h4=+ Rg8 10.g5 hg5 11.hg5 Ne4 12.Ne5 Ng5?? (better 12...Nc6-/+) 13.Qh5+- g6 14.Qg5 Qg5 15.Rg5 f6 (15...Be7 16.Rg2+-) 16.Rg6+- Rg6 17.Ng6 Kf7 18.Nf4 Nc6 19.Be2 Bd7 (19...Bd6 20.Nc3+-) 20.Bh5 Kg7 (20...Ke7 21.Ng6 Kd6 22.Bf6+-) 21.Ke2 (21.Bg4 e5 22.Bd7 ef4+-) 21...Rh8? (21...Bd6 22.Na3 Bf4 23.ef4+-) 22.Na3 (22.Bg4 Bd6 23.Be6 Be6 24.Ne6 Kf7 25.Ng5 Ke7+-) 22...Ne5? (22...Ne7+-) 23.Rg1 Kf8 (23...Kh6 24.d4 Nc6 25.Bf7+-) 24.Be5 (24.d4 Rh5 25.Nh5 Nc4 26.Nc4 Bb5+-) 24...fe5 (24...Rh5 25.Nh5 fe5 26.Nb1+-) 25.Ng6 Kg7 26.Ne5 Kh6 (26...Kf6 27.Nd7 Ke7 28.Rg7 Kd6 29.Nb5 ab5 30.Nf6+-) 27.Bf7 (better 27.Nd7 Kh5 28.Rh1 Kg6 29.Rh8 Ba3 30.Rb8+-) 27...Bb5 (27...Rf8 28.Nb1 Bd6 29.Be6 Bb5 30.Nd3 d4+-) 28.Nb5 ab5 29.Rg6 (better 29.Be6 Rf8 30.Nf7 Rf7 31.Bf7 d4 32.ed4 Kh7+-) 29...Kh7 30.Nd7 Be7 31.Re6 Bd8 32.Ne5 Kg7 (32...Rf8 33.f4+-) 33.Bg6 (better 33.Rg6 Kh7+-) 33...Bf6 34.Nd7 Kg6 (34...Ba1 35.d4+-) 35.Rf6 Kg7 36.Rb6 Rc8 37.Rb7 Rc2 38.Rb5 Rc7 (38...d4 39.e4+-) 39.Rd5 Kf7 40.Nc5 Ke7 41.Rd7! Rd7 42.Nd7 Kd7 (42...Kd6+-) 43.d4 Kd6 44.e4 Ke6 45.f4 Kf6 46.Kf3 Ke6 47.Ke3 Kd6 48.d5 Ke7 49.f5 Kd6 50.Kd4 Ke7 51.e5 Kd7 52.d6 Kc6 53.f6 Kd7 (53...Kb7 54.f7 Kb8 55.f8Q Kb7 56.d7 Kc6 57.d8Q Kb5 58.Qb8 Kc6 59.Qfd6) 54.f7 Kc6 55.f8Q Kd7 (55...Kb5 56.Qb8 Kc6 57.Qc7 Kb5 58.Qb7 Ka4 59.Kc4 Ka5 60.Qb5) 56.Qe7 (56.Kc5 Ke6 57.Qf6 Kd7 58.Qe7 Kc8 59.Qc7) 56...Kc6 57.Kc4 Kb6 58.Qc7 Ka6 59.Qc5 (59.Qb8 Ka5 60.Qb5) 59...Kb7 60.Qa5 (60.d7 Ka6 61.d8Q Kb7 62.Qdc8) 60...Kc6 (60...Kb8 61.d7 Kb7 62.d8Q Kc6 63.Qad5) 61.Qc7 1–0. FeegLood (1920) – MASTERoftheUNIVERSE (1720), lichess.org, 2015.

4.a3 Bd7 5.Nf3 Nc6 6.c4 dc4 7.Bc4 Nf6 8.0-0 Bd6 9.d4 Qe7 10.Qc2 h5 (10...0-0 11.Nc3+=) 11.Nbd2 h4 12.e4 Bf4 13.e5 (13.Rfe1 Rd8+/–) 13...Nd5+= 14.Ne4 g5?? (better is 14...0-0-0+=) 15.Bd5+- ed5 16.Nf6 Kd8 17.Nd5 Qe6 (17...Qf8 18.Nf4 gf4 19.d5+-) 18.Nf4 gf4 19.Qe4 (better is 19.d5 Qd5 20.e6+-) 19...Rg8 20.Qf4 Rg4 (20...h3 21.g3+-) 21.Qf6 Qf6 22.ef6 Be6 (22...h3 23.g3 Rg8+-) 23.d5! Bd5 24.Rad1 A pinning theme 24...Nb4 25.ab4 c6 26.Rd4 (better is 26.Rfe1 h3 27.Re7 b5+-) 26...Rg6 (26...Rd4 27.Bd4 Bf3 28.gf3 Kd7+-) 27.Nh4 Rg5 28.f3 (28.Bc1 Re5 29.Bf4 Rh5+-) 28...Kc7 29.Rg4 (29.g4 a5+-) 29...Rh5 30.g3 Re8 (30...a5 31.ba5 Ra5 32.Ng2+-) 31.Ng2 Bb3 32.Re1 Rd8 (32...Re1 33.Ne1 c5 34.Nd3+-) 33.Rd4 (33.Re7 Kc8+-) 33...Rhd5 (33...Rd4 34.Bd4 Rb5 35.Re7 Kd8 36.Bc3+-) 34.Rd5 Bd5 (34...Rd5 35.Nf4 Rd1 36.Rd1 Bd1 37.Ne6 Kb6 38.Ng5+-) 35.Kf2 Ra8 (35...Kb6 36.Re7 c5 37.bc5 Kc5 38.Nf4+-) 36.Bc3 (36.Re7 Kb6 37.Bd4 Kb5 38.Rb7 Kc4+-) 36...b6 (36...Rd8 37.Nf4+-) 37.Ne3 (better is 37.Re7 Kb8 38.h4 a5 39.ba5 Ra6+-) 37...Be6 38.f4 c5 (38...a5 39.Be5 Kd7 40.Rd1 Ke8 41.Rd6+-) 39.bc5 b5 (39...bc5 40.Ba5 Kc6 41.Rb1+-) 40.f5 (40.Nc2 Rc8+-) 40...Bb3 41.Rb1 Ba2 (41...Ba4 42.Be5 Kc6 43.Bd6+-) 42.Rb2 Rh8 (42...Bc4 43.Nc4 bc4 44.Ke3+-) 43.h4 (43.h4 Bc4 44.Nc4 bc4 45.Rb6+-; 43.Ra2 Rh2 44.Ng2 Kb7+-) 1–0. Andersson,Lars H (2620) – Oehman,Kenneth, Sweden, 1987.

4.a3 Be7?? 5.Nf3?? (better is 5.Bg7 Bf6 6.Bh8 Bh8 7.d4+-) 5...Bf6 6.Qc1 h6 7.Be2 Bb2 8.Qb2 Qf6 9.Qf6 Nf6 10.0-0 0-0 11.c4 c6 12.Nc3 Nbd7 13.d3 dc4 14.dc4 c5 15.Rfd1 b6 16.bc5 Nc5 17.Ne5 Bb7 18.Rab1 b5 19.cb5 a5 (19...Nce4 20.Rbc1 Nc3 21.Rc3 ab5 22.Bb5 Rfd8 23.Rd8 Rd8+/–) 20.Nc6 Bc6 21.bc6 a4 22.Bf3 Rac8 23.Rb5 Nb3 (23...Na6+-) 24.Na4 Rb8 (24...Ra8 25.Nb6 Ra3+-) 25.Rb8 Rb8 26.c7 Rc8 27.Rd8 Rd8 28.cd8Q Kh7 29.Qd3 (29.Qd3 Kg8 30.Qb3+-) 1–0. Saint Jean,Benoit (1610) – Venturas,Bob, IECG, 2001.

4.a4 Bb4?? 5.Bg7 Ne7 6.Bh8 Ng6 7.Bb2 e5 8.Nf3 Nc6 9.Be2 Be6 10.0-0 Qf6 11.d3 0-0-0 12.Nfd2 d4 13.Bg4 Qe7 14.Nc4 (14.Be6!? Qe6 15.ed4 ed4+-) 14...f5 15.Bf3 (better is 15.Bh3 Qg5 16.Nbd2 Bd2 17.Qd2 Bc4 18.dc4 de3 19.Qe3 Nf4+-) 15...f4? (15...e4 16.Bh5 Bc4 17.Bg6 hg6 18.dc4 de3+/–) 16.Bc6 bc6 17.ed4 ed4 18.Nbd2 Nh4 19.Ne5 (19.g3 Ng6+-) 19...Bd5?? (19...Qg5 20.g3 fg3 21.hg3 Qe5+/–) 20.Ndf3 Bf3 (20...Ng2 21.h3 (21.Kg2 Qg7 22.Kh1 Qe5-+) 21...Rg8 22.Kh2+-) 21.Nf3 (21.gf3 Qe5 22.Kh1 Qd5-/+) 21...Ng2 (21...c5 22.Nh4 Qh4 23.Qf3+-) 22.Kg2 Qg7 (22...c5 23.Rb1+-) 23.Kh1 Qe7 (23...c5 24.Rb1+-) 24.Nd4 Qd6 25.c3 (better is 25.Qg4!? Rd7+-) 25...Qd5 26.Qf3 (26.f3!? Bc5+-) 26...Qf3 27.Nf3 Bd6 28.d4 c5 29.Rg1 c4 30.Rg7 h5 31.Rh7 c5 32.Rh5 cd4 33.Nd4 Kd7 34.Rh7 Kc8 35.Rd1 Re8 36.Rh6 Bb8 37.Ra6 Kb7 38.Rc6 (38.Rc6 Be5 39.Rc4+-) 1–0. Hal1958 – Foxcar, playchess.de, 2004.

4.a4 c5 5.bc5 Bc5 6.Bg7 Be7 7.Bh8 Nf6 8.Nf3 Nc6 9.Bd3 (9.d4 Qa5 10.Nbd2 Ne4+-) 9...Qc7 (9...e5 10.Bf6 Bf6 11.e4+-) 10.0-0 h5 11.Nc3 Ng4 12.h3 Nf6 13.Be2 Bd7 14.Bf6 (14.Ng5!? d4 15.Bf6 Bf6+-) 14...Bf6 15.d4 (15.Qb1 Na5+-) 15...h4 (15...Nd4 16.Nd4 Qc3 17.Bh5+-) 16.Bd3 Be7 (16...Rc8 17.Qb1+-) 17.Ne2 Qd8 (17...Rc8 18.c4+-) 18.c4 dc4 19.Bc4 Na5 20.Bd3 Nc6 21.Nf4 Nb4 (21...Bd6 22.Rb1+-) 22.Ne5 Bf6 23.Nd7 (23.Be4 Be5 24.de5 Qg5+-) 23...Qd7 24.Qh5 Nd3 25.Nd3 Qe7 (25...Rc8 26.Rab1 b5 27.ab5 ab5 28.Rb5+-) 26.Qg4 (26.Rfc1 Rd8+-) 26...Kf8 (26...Bg5 27.Rab1+-) 27.Rab1 a5 (27...Ra7 28.Nc5+-) 28.Nc5 b5 (28...Ra7 29.Rfc1+-) 29.Rb5 Qe8 (29...Rd8 30.Rc1 Rd5 31.Ra5+-) 30.Qf3 Kg7 31.Rfb1 (31.Ne4!? Bd8 32.Qg4 Kf8+-) 31...Be7 32.Qg4 Kf8 33.Ne4 (better 33.Rb8! Rb8 34.Rb8 Qb8 35.Nd7 Ke8 36.Nb8 Bd6 37.Qg8 Ke7 38.Nc6 Kd7 39.Na5 Ke7+-) 33...f5 34.Qf3 Kg7 35.Nd2 Bb4 36.Rb7 Kg6 (36...Kg8 37.Qf4 Qh5 38.Qc7+-) 37.Nc4 Qg8 38.Ne5 Kh6 39.Qf4 Kh5 (39...Qg5 40.Nf7 Kg7 41.Qg5 Kf8 42.Qh6 Ke8 43.R1b4 ab4 44.Qh8) 40.Nf7 (40.g4 hg3 41.fg3 Be7 42.g4 Kh4 43.Kh2 Qg4 44.Qh6 Qh5 45.Ng6) 40...Bf8 41.R1b6 (41.R1b5 Qg2 42.Kg2 Kg6 43.Ne5 Kh5 44.Rh7 Bh6 45.Rh6) 41...Rc8 (41...Re8 42.Re6! Qg6 43.Qf3 Qg4 44.hg4 fg4 45.Qd5) 42.Qf3 (42.Re6 Qg2 43.Kg2 Bd6 44.Qf5) 42...Kg6 43.Re6 Kg7 44.Nh6 (44.Nd6 Be7 45.Rbe7 Qf7 46.Rf7 Kg8 47.Rg6 Kh8 48.Qh5) 44...Kh8 (44...Be7 45.Nf5 Kh8 46.Rh6 Qh7 47.Rh7 Kh7 48.Qh5 Kg8 49.Qg6 Kf8 50.Qg7 Ke8 51.Qe7) 45.Ng8 Rc1 46.Kh2 Rh1 (46...Rc4 47.Qh5 Bh6 48.Rh6 Kg8 49.Qe8) 47.Kh1 f4 (47...Bb4 48.Rh6 Kg8 49.Qd5 Kf8 50.Rh8) 48.Qh5 Bh6 49.Qh6 Kg8 50.Re8 (50.Qg7) 1-0. Fuirio (1615) - General_Wolfox (1995), Rated Classical game, lichess.org, 2013.

4.c4 Bb4?? 5.Bg7 Bd2 6.Nd2 dc4 7.Bh8 +-.

4.c4 Nc6 5.a3 dc4 6.Bc4 b5 7.Bb3 f5 (7...a5 8.Nc3=) 8.Nf3 (8.Qh5 Ke7+=) 8...Nf6 (8...a5 9.Qc2 Nge7 10.Nc3+=) 9.h4 (9.Ng5 Ke7+/-) 9...Ne4 (9...a5 10.Nc3 Rb8 11.Qe2=) 10.Qc2 (better 10.d3 Nd6 11.Qc2+/-) 10...a5?? (better 10...Qd6+=) 11.Qc6+- Qd7 (11...Bd7 12.Qc2 ab4 13.ab4 Ra1 14.Ba1 Bb4 15.Bg7 Rg8+-) 12.Qa8 ab4 13.ab4 Bb4 14.Qa2 (better 14.Ne5 Qd8 15.Nc6 Bd2 16.Ke2 Qd7+-) 14...0-0 15.Nc3 h5 (15...Bc3 16.Bc3 c5 17.Qa7+-) 16.Rd1 (16.0-0 Bc3 17.dc3 c5+-) 16...c5 17.Ne5 Qc7 (17...Qd6 18.Nb5 Bd2 19.Ke2+-) 18.Be6 Be6 (18...Kh7 19.Nb5 Qd8 20.Bd5+-) 19.Qe6 Rf7 (19...Kh7 20.Nd7 Rd8 21.Qf5 Kh8 22.Ne4 Qd7 23.Qg6+-) 20.Nf7 (better 20.Nd5 Qb7 21.Qe8 Rf8 22.Ne7 Qe7 23.Qe7 Rf6+-) 20...Qf7 21.Qf7 Kf7 22.Ne4 (22.Nb5 g6+-) 22...fe4 23.Ke2 (23.Ra1 g6+-) 23...c4 24.Bc3 Bd6 25.Rb1 g5 26.hg5 h4 27.Rh4 Be7 28.Rh7 Ke6 29.Rb5 Bg5 (29...Bd6 30.g6 Bc7 31.g7 Kf7 32.Rf5 Kg6 33.g8Q Kf5 34.Rh5) 30.Rb6 (30.Rg5 Kd6 31.Rg6 Kd5 32.Rh5) 30...Kf5 31.Rf7 (31.f3 ef3 32.Kf3 Bf6 33.Rf6 Kg5 34.Rg7 Kh5 35.g4 Kh4 36.Rh6) 31...Kg4 32.Rg7 Kf5 (32...Kh4 33.Bf6 Kh5 34.Rg5 Kh6 35.Rb8 c3 36.Rh8) 33.Rg5! Kg5 34.Rc6 (34.f3 Kh4 35.Be5 Kg5 36.Bf4 Kf5 37.g4) 34...Kf5 (34...Kg4 35.Rc5 Kh4 36.Bf6 Kg4 37.Rg5 Kh4 38.f4 c3 39.Rg6 Kh5 40.f5 cd2 41.g4) 35.Rc4 (35.f3 Kg5 36.Be5 ef3 37.Kf3 Kf5 38.Bf4 c3 39.e4) 35...Ke6 36.g4 Ke7 37.Re4 Kf7 38.Ra4 Kg6 39.Ra5 Kh6 40.Bb4 (40.Ra6 Kh7 41.g5 Kg8 42.g6 Kf8 43.Bf6 Ke8 44.Rd6 Kf8 45.Rd8) 40...Kg6 41.f4 White intends g5 41...Kf6 42.g5 (42.f5 Kg7 43.Ra7 Kh8 44.f6 Kg8 45.f7 Kg7 46.f8Q Kg6 47.Qg7) 42...Kg6 43.Ra6 Kh5 (43...Kf7 44.g6 Kg7 45.Bc3 Kh6 46.d3 Kh5 47.g7 Kh4 48.g8Q Kh5 49.Qg5) 44.g6 (44.Kf3 Kh4 45.Rh6) 44...Kg4 (44...Kh6 45.Bf8 Kh5 46.g7 Kh4 47.g8Q Kh5 48.Qg5) 45.g7 Kh3 (45...Kf5 46.g8Q Ke4 47.Qe6) 46.g8Q Kh2 (46...Kh4 47.Rh6) 47.Rh6 1-0. Kameshkovsky – usercome, Rated Classical game, lichess.org, 2013.

4.Be2 Bb4?? 5.Bg7 Qg5 6.Bh8 Qg2 7.Bf3 Qg5 8.Bc3 Nc6 9.Bb4 Nb4 10.a3 Nc6 11.Nc3 Nf6 12.Nge2 Bd7 13.Na4 (13.Rg1 Qh4+-) 13...b6 (13...Ne5 14.Nec3 Ba4 15.Na4 Qf5+-) 14.Qb1 (better is 14.h4 Qh6+-) 14...Qf5?? (better is 14...Ne5 15.Ng1 Ba4=) 15.Bg2+- Ne5 (15...Qg4 16.Nf4 e5+-) 16.Ng3 Qg4 17.Nc3 Nf3 18.Bf3 Qf3 19.Qd1 Qd1 20.Nd1 Bc6 21.0-0 (21.d4!? Ke7+-) 21...Ke7 22.f4 Rg8 23.Kf2 Ng4 24.Kg1 (24.Kg2 Nf6 25.Rg1 d4 26.Kf2 Rg4+-) 24...Nf6 25.Kg2 (25.d4!? h5 26.Kh1 h4+-) 25...d4 26.Kh3?? (26.Kf2 Ng4 27.Kg1+/–) 26...de3?? (better is 26...Rg6 27.e4 Rh6 28.Kg2 Ne4 29.Ne4 Be4 30.Kg3 Rg6 31.Kf2 Rg2 32.Ke1 Bc2+=) 27.Ne3+- (27.de3?! Rg6 28.e4 Rh6 29.Kg2 Ne4 30.Ne4 Be4 31.Kg3 Rg6 32.Kf2 Rh6+/–) 27...Rg6 28.Kh4 White prepares the advance f5 (28.Ng2!? Kd6+-) 28...Bd7?? (better is 28...Rh6 29.Kg5 Rg6 30.Kh4 Rh6 31.Kg5 Rg6 32.Kh4=) 29.f5+- ef5? (29...Rh6 30.Kg5 Rh2+-) 30.Ngf5 Kf8 31.Rg1 Ne4 32.Rg6 (32.d3 Nd2 33.Rg3 Bc6+-) 32...hg6 33.Ng3 (33.Nd4!? c5 34.Nf3 b5+-) 33...Nd2 34.Rd1?? (better is 34.Kg5 Nf3 35.Kf6+-) 34...Nf3 0–1. mikebaldini – nickmeek, gameknot.com, 2015.

4.Nf3 b6 5.Be2 Nc6 6.a3 Bb7 7.0-0 f6 8.d4 (8.c4 Nge7+-) 8...Na7 (8...b5 9.Nbd2+-) 9.c4 dc4 10.Bc4 Qd7 11.Nc3 0-0-0 (11...Ne7!?+-) 12.Qd3 (12.Qe2 Kb8+-) 12...b5 13.Bb3 g5 (13...Ne7 14.Rfd1+-) 14.Rfc1 (14.Nd2 f5+-) 14...Kb8 15.Ne4 f5? (15...h5+-) 16.Neg5 h6 (16...Bf3 17.Nf3 Nf6+-) 17.Ne6 Rc8 (17...Bd6 18.Nd8 Qd8 19.Qf5+-) 18.d5 Bd6 (18...Rh7 19.Ne5 Qe8 20.Qf5+-) 19.Bh8 Ne7 20.Ne5 Be5 21.Be5 Nd5 22.Nc7! Nc7 (22...Rc7 23.Rc7 Pinning (23.Rc7 Decoy); 22...Nc7 23.Qd6 Double attack (23.Qd7 Pinning; 23.Qd7 Deflection; 23.Qd6 Decoy)) 23.Qd7 Rg8 (23...Ka8 24.Rc7 Rb8 25.Bd5 Nc6 26.Bc6 Rg8 27.Rc8 Rc8 28.Qb7) 24.Bg8 Ka8 (24...Nc6 25.Qc7 Ka7 26.Rc6 a5 27.Qb8) 25.Qc7 a5 (25...Nc6 26.Rc6 Bc6 27.Qb8) 26.Qb8 1–0. Janek – Ccvmep, internet, 2019.

4.Nf3 Qd6 5.a3 Bd7 (5...Nd7 6.c4=) 6.Be5 (6.Bd4 Qe7+=) 6...Qc6= 7.Nc3 (7.a4 b6= (7...Bb4?? 8.Bg7 Ne7 9.Bh8+-)) 7...Nh6 (7...f6 8.Nd4 Qb6 9.Bg3=) 8.Bd3 (8.Nd4 Qb6+=) 8...Bc8 (8...f6 9.Bf4+=) 9.e4+- d4 (better 9...de4!? 10.Be4 Qd7+-) 10.Nd4+- Qd7 11.Qh5 Qe7 (11...Nc6 12.Nc6 Qc6 13.0-0+-) 12.0-0 Nc6 (12...c6 13.Bf4+-) 13.Nc6 bc6 14.h3 (14.Bf4 a5+-) 14...Bb7 (14...Ng8 15.Rfb1+-) 15.Na4 0-0-0 (15...Ng8 16.Nc5 Bc8 17.Qf3+-) 16.Rab1 (16.Nc5 Qe8 17.Na6 f6 18.Qe8 Re8+-) 16...Qe8 17.Qe2 Ng8 (17...f6 18.Bh2 c5 19.Nc5 Bc5 20.bc5 Qc6+-) 18.Ba6 Ba6 (18...f6 19.Nc5 Bc5 20.Bb7 Kd7 21.bc5 Ke7 22.Bc7 Kf7 23.Bd8 Qd8 24.Bc6 Ne7+-) 19.Qa6 Kd7 20.Nb6 Ke7 21.Qb7 f6 22.Qc7 Rd7 23.Bd6 (23.Nd7 Qd7 24.Bd6 Ke8 25.Qd7 Kd7 26.Bf8 h5+-) 23...Kf7 24.Nd7 Bd6 25.Ne5 Kf8 26.Qd6 Ne7 (26...Qe7 27.Qb8 Qe8 28.Nc6 Qb8 29.Nb8+-) 27.Rb3 (better 27.f4 g6 28.f5 gf5 29.ef5+-) 27...fe5 (27...g6 28.Nd7 Kg7+-) 28.Rf3 Kg8 29.Qe6 (29.Qe6 Qf7 30.Qf7) 1–0. Pierre – Henriksen, internet, 2020.

4.Nf3 Ne7 5.c4 Ng6 6.cd5 Qd5 7.Nc3 Qf5 8.Nd4 Qe5 9.a3 Bd7 10.Qc2 Nc6?? (better is 10...Qg5+=) 11.Nc6+- Bc6 12.Nb5 ab5 13.Be5 (13.Be5 Ne5 14.Qc3+-) 1–0. Janek – Kevin, internet free game, 2016.

4.Nf3 f6 5.a3 Bd6 6.Ng5 Ne7 (6...fg5? 7.Bg7 Nf6 8.Bh8+-) 7.Be2? (better is 7.Nf3+=) 7...fg5-+ 8.Bg7 Rg8 9.Bf6 Qd7 10.0-0 Rf8 (10...e5 11.d4 Qf5 12.de5 Be5 13.Be5 Qe5 14.Nd2-+) 11.Bh5 Kd8 12.Bg5 Be5 (12...a5 13.ba5 e5 14.f4 ef4 15.Bh6-/+) 13.d4 Bf6 14.Bh6 Rh8 15.Bf7?? (better is 15.Qf3 Ng8 16.Bg5-/+) 15...Nf5-+ 16.Qh5 Nh6 17.Be6 Qe6 18.Qh6 Bd7 (better is 18...Qf7 19.Nd2 Rg8-+) 19.f4 (19.Nc3 Be7 20.Qe6 Be6-+) 19...b6 (better is 19...Qe3 20.Kh1 Qd4 21.Nd2-+) 20.f5 Qe7 21.Nc3 c6 22.Qh3 b5 23.Ne2 a5 24.c3 a4 (24...Re8 25.Rf3-+) 25.Nf4 Qe4 26.Nh5 (26.Qh6 Qe3 27.Kh1 Qe7-+) 26...Bg5 27.Rae1 Rg8 28.Qf3 (28.Qg3 A) worse is 28...Bf5 29.Nf6 Be3 30.Re3 Rg3 A1) 31.Ne4?? Re3 (31...de4?! 32.Rg3 Bg6 33.Rg5=; 31...Be4?! 32.Rg3 Bg6 33.Rf8 Kc7 34.h4=) 32.Ng3 Be4-+; A2) 31.Re4 Be4 32.hg3-+; B) 28...Qe7-+) 28...Qf3 (better is 28...Bf5 29.Ng3 Qf3 30.Rf3-+) 29.Rf3 (29.gf3?? Be3 30.Kh1 Bd2-+) 29...Kc7 30.Ref1 h6 31.g4 Na6 32.h3 Kb6 (32...Rae8 33.Kf2-+) 33.f6 c5! 34.bc5 (34.bc5 Kc6 Combination; 34.dc5 Kc6 Combination) 34...Kc7 (better is 34...Kc6!?-/+) 35.f7+= Rgf8 36.Ng7? (better is 36.Nf6!?=) 36...Nc5! 37.Ne8?? (37.dc5 Kc6 Decoy) 37...Be8-+ 38.fe8Q (38.h4 Be7 39.fe8Q Rae8 40.dc5 Rf3 41.Rf3 Bc5-+) 38...Rfe8 (38...Rae8?! 39.Rf8 Be3 40.Kg2 Rf8 41.Rf8-+) 39.Rf7 (39.dc5 Be3 40.Kg2 Bc5 41.Rf7 Kd6 42.Rb1-+) 39...Nd7 40.R1f5 Be3 41.Kf1 (41.Kg2 Kd6 42.Rg7 Bc1-+) 41...Kc6 (better is 41...Rf8 42.Ke2 Rf7 43.Rf7-+) 42.Ke2 (42.Rg7 Re6-+) 42...Bc1 43.Kf1 (43.Kd1 Ba3 44.Rh5 Bf8-+) 43...Ba3 44.Rh7 Re6 45.g5 (45.Rf2 Rf8 46.Rf5 Be7 47.Rf8 Bf8-+) 45...hg5 46.Rg5 Rf8 47.Kg2 Nf6 (47...Bd6 48.h4 Re2 49.Kh3 Rh2 50.Kg4 Nf6 51.Kf5 Nh7 52.Kg6 Ng5 53.c4 Rg8 54.Kh5 Ne4 55.cb5 Kb5 56.Kh6 Rh4) 48.Rh6 (48.Ra7 Re2 49.Kf1 Rc2-+) 48...Bd6 0–1. tekkeryole – ujjvalverma, gameknot.com, 2013.

4.Nf3 Nf6 5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

4.Nf3 h6 5.c4 dc4 6.Bc4 Nf6 7.0-0 (7.a3 b5 8.Bb3 Bd6+=) 7...Be7 (7...Bb4!? 8.Qa4 Nc6=) 8.a3+= 0-0 9.d4 Nc6 10.Nc3 Bd7 11.e4 Na7 (11...b5!? 12.Be2 a5 13.ba5 Na5+=) 12.e5+- Nd5 13.Nd5 ed5 14.Bd5 Rb8 15.Rc1 Be6 16.Be6 fe6 17.Rc2 (17.d5 ed5 18.Qd3 Nc6+-) 17...Nb5 (17...Qd5 18.Qd3 Nc6 19.Re1+-) 18.Qd3 Bg5 (better 18...c6!?+-) 19.Ng5 Qg5? (better 19...hg5 20.a4 Na7+-) 20.a4 Na7 21.Rfc1 (better 21.Rc7!? Qd8 22.Qc4+-) 21...c6 22.Qc4 Rfe8 23.Re1 Qf5 24.Bc1 Nc8 25.Qc3 Ne7 26.Ra2 Nd5 27.Qg3 (27.Qc4!?+-) 27...Nb4= 28.Bh6 (28.Rae2=) 28...Re7?? (better 28...Qh7!? 29.Qb3 Na2-/+) 29.Bg5 (29.Rd2 b5 30.Ra1 ba4+-) 29...Rf7 (29...Rd7!? 30.Rd2 Nc2=) 30.Rd2+- Qh7 (30...b5 31.Ra1+-) 31.Rc1 Nd5 32.Rb2 (32.a5 Rbf8+-) 32...Qg6 (32...Qe4 33.Rd1+-) 33.Rc6 bc6?? (better 33...Qe4 34.h4 Qd4+=) 34.Rb8+- Rf8 35.Rf8 Kf8 36.Qf3 Kg8 37.Bc1?? (better 37.h4 Qb1 38.Kh2+-) 37...Qb1 38.Qa3 Qe4?? (better 38...Nf4! 39.g4 Ne2 40.Kg2 Qc1 (40...Nc1?! 41.Qd6=+) 41.Qc1 Nc1-+) 39.h4 Qe1 (39...Qd4!? 40.Bg5 Qe5+=) 40.Kh2+- Qf2 41.Qg3 (41.Bg5!?+-) 41...Qd4+= 42.Bh6 Kf8?? (better 42...Qa7+=) 43.Qg7+- (43.Bg7?! Kf7 44.Bh6 Ke8+-) 43...Ke8 44.Qf8 Kd7 45.Qd6 Ke8 (45...Kc8 46.Qe6 Kb7+-) 46.Qe6 (46.Qc6 Ke7 47.Bg5 Kf7 48.Qd7 Kg6 49.Qe6 Kh7+-) 46...Kd8 47.Bg5 Kc7 48.Qd6 Kb7 49.e6 Qa4 50.e7 (better 50.Qd7 Kb6 51.e7 Ne7 52.Qe7+-) 50...Ne7 (50...Qe4+-) 51.Qe7 Kb6 52.Be3 Kb5 53.Qc5 1–0. Darkseid (1950) – astropawns, ChessWorld.net, 2015.

5.a5 Bb4?? 6.Bg7 Ba5 7.Bh8 +-.

5.a5 Nf6 6.ab6 cb6 =.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4 Nf6 9.Nf3 dc4 10.Bc4 Nbd7 11.0-0 Qc7 12.Na3 Bd6 13.Bb3 Ne5 (13...Bb7!?=+) 14.Be5+= Be5 15.Ne5 Qe5 16.Nc4 Qc7 17.Qf3 Bb7 (17...0-0!?=) 18.Qb7!+/- Qb7 19.Nd6 Ke7 20.Nb7 Rb8 21.Nc5! bc5 22.Bc4 Ne4 23.d3 Nd2 (23...Nc3 24.Ra1+/-) 24.Ra1+- Nc4 25.dc4 Rb7 26.Kf1 h5 27.Ke2 Kd7 28.Ra6 Rc7 29.Kd3 g6 (29...Ke7 30.h4+-) 30.Ke4 f6 31.g3 g5 (31...Ke7 32.Ra8 Rd7 33.Rg8+-) 32.f4 g4 (32...gf4 33.gf4 Rb7 34.f5 ef5 35.Kf5+-) 33.f5 e5 (33...ef5 34.Kf5 Rc8+-) 34.Rf6 (34.Rf6 Ke7 35.Rh6+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.Nf3 Bb4?? 6.Bg7 Nf6 7.Bh8 +-.

5.Nf3 Nc6 6.b5 Na5 7.d4 (7.Be2 Nf6=) 7...Nf6 8.Nbd2 Bd6 9.Bd3 0-0 10.e4 (10.0-0 c6=) 10...c5 (10...de4!? 11.Ne4 Ne4 12.Be4 Bb7 13.Bb7 Nb7=) 11.e5+= c4 12.Be2 (< 12.ed6 cd3 13.Ba3 Bd7=+) 12...Bb4? (better is 12...Ne4 13.Ne4 de4+=) 13.c3+- (13.ef6?! c3 14.fg7 cd2 15.Nd2 Kg7+/–) 13...Be7 14.ef6 Bf6 15.0-0 Nb7 16.Ne5 Qc7 (16...Bd7 17.Ba3 Re8 18.Bh5 Be5 19.de5 ab5 20.ab5 Bb5 21.Qf3+-) 17.Ba3 Re8 18.Ng4 (18.f4 Bd7+-) 18...Bg5 19.Nf3 Bf4 20.Qc2 f6 21.g3 (21.ba6 Ra6 22.g3 Bd6+-) 21...Bd6 22.Rfb1 (22.ba6 Ra6 23.Bd6 Nd6+-) 22...Bd7 (22...ab5 23.Rb5 Bd7 24.Rbb1+-) 23.ba6 (23.Bd6 Nd6 24.ba6 Ra6+-) 23...Ra6 (23...Ba3 24.Ra3 Ra6 25.Rb4+-) 24.Bd1 (better is 24.Bd6 Nd6 25.Bd1+-) 24...Ba4?? (better is 24...e5 25.Bd6 Qd6+-) 25.Bd6 Nd6 26.Ra4 Rea8 27.Rba1 Ra5 (27...Ra4 28.Ra4 Ra4 29.Qa4+-) 28.Ne3 b5 (28...Qd8 29.Qb2+-) 29.Ra5 Ra5 30.Qb2 Qa7 31.Ra5 Qa5 32.Nd2 Qc7 33.Qa3 (33.Bg4 Qe7+-) 33...f5 (33...g6 34.Qb4+-) 34.Nf3 Kf7 (34...Qe7 35.Ne5+-) 35.Ne5 (35...Kf8 36.Bh5+-; 35.Ng5 Kf6 36.Nh7 Kg6 37.Nf8 Kf7+-) 1–0. Mehlhorn,U – Heineccius,A, BFO–070, 2000.

5.Nf3 Nd7 6.Be2 Be7?? (better is 6...Ngf6 7.b5 Bd6=) 7.Bg7+- Ngf6? (7...Bf6 8.Bh8 Bh8+-) 8.Bh8 h6 (8...Bb4 9.Bg7+-) 9.Bf6 (9.c3 c5+-) 9...Bf6 10.d4 Bb7 11.0-0 Qe7 12.b5 a5 (12...ab5 13.Bb5 c6 14.Be2+-) 13.c4 dc4 14.Bc4 0-0-0 15.Nbd2 Rg8 16.Rc1 Kb8 17.Qc2 Qd6 (17...Qd8 18.Bd3+-) 18.Ne4 (18.Bd3 Bd8+-) 18...Be4 (18...Qf8 19.Bd3 Qd8 20.Ned2+-) 19.Qe4 Bh8 (19...Bg7 20.Bb3 Nf6 21.Qb1+-) 20.Bd3 Qd5 (20...Nf6 21.Qh4+-) 21.Qd5 ed5 22.Rc6 h5 (22...Re8 23.Rfc1+-) 23.Rfc1 Rc8 (23...Bg7 24.Bf5 Nf6 25.Rc7+-) 24.Ng5 (24.Bf5 Bg7 25.Bd7 Rd8 26.Rc7 Bf6+-) 24...f6 (24...Bf6 25.Nf7 Bh4+-) 25.Ne6 h4 26.Rc7 Rc7 27.Nc7 Nf8 28.Nd5 (28.Na6 Ka8 29.Rc8 Kb7 30.Rc7 Ka8 31.Bf5 Bg7 32.Bc8 Ne6 33.Be6 h3 34.Bd5) 28...Ne6 (28...f5 29.Bf5 Bd4 30.Rc8 Ka7 31.Be4 Ne6 32.Ne7 Nc7 33.Nc6 Kb7 34.Rb8) 29.Nb6 (29.Bf5 h3 30.Be6 Ka7 31.Rc7 Kb8 32.Rc8 Ka7 33.Ne7 Bg7 34.Bd5 hg2 35.Ra8) 29...Kb7 If Black now only could play f5... 30.Nc4 (30.Nc8 Nc5 31.Rc5 Kb8 32.b6 Kb7 33.Rc7 Kb8 34.Nd6 Bg7 35.Rc8) 30...h3 31.gh3 (31.Nd6 Kb6 32.Rc6 Ka7 33.b6 Kb8 34.Rc8) 31...Ng5 32.Kg2 (32.Nd6 Ka7 33.Rc7 Kb8 34.b6 Nh3 35.Kf1 Nf2 36.Rc8) 32...Bg7 (32...Kc7 33.Na5 Kd7 34.Bf5 Kd8 35.b6 Ke8 36.Rc7 Nf7 37.Bg6 Bg7 38.b7 Kf8 39.b8Q Nd8 40.Qd8) 33.Na5 (33.Nd6 Ka7 34.Rc7 Ka8 35.b6 Nh3 36.Rc8) 33...Kb6+- 34.Nc4 Kb7 35.Nd6 Kb6 1–0. Starr,Albert – Yanez,Rodrigo, Winter TNM San Francisco, 2006.

5.Nf3 Nf6 6.b5 c5 7.c4 Be7 8.Be2 Bb7 9.0-0 0-0 10.d4 Nbd7 11.Nbd2 a5 12.h3 Rc8 13.Rc1 cd4 14.Bd4 Nc5 15.Bc5 (15.cd5 Bd5 16.Bc4 Qc7=) 15...Bc5=+ 16.Nb3 Ba3 17.Rc2 Ne4 18.Nfd2 dc4 (18...Qe7!?=+) 19.Nc4+= (< 19.Bc4 Bb4-/+; 19.Rc4 Nc3 20.Rc3 Rc3-+) 19...Bd5? (19...Bb4 20.Qd8 Rfd8 21.Rfc1=) 20.Qd4?? Bc5 21.Qb2 Bc4 22.Rc4+= Nf6 23.Nc5 bc5 24.Bf3 Nd5 25.Rd1+- Qe7 26.Bd5 ed5 27.Rd5 Rfd8 28.Rd8 Rd8 29.Qc3 Rd1 30.Kh2 Qc7 31.g3 Rd5 32.e4 Rh5 33.f4 Qc8? 34.f5 h6 (34...Qd7 35.Rc5 h6 36.Rd5+- (36.Qa5?! Qd1=)) 35.Rc5 Qb7 36.Rc8 Kh7 37.Qc6 Qe7 38.b6 Qb4 39.b7?? Qd2= 40.Kg1 Qe3 41.Kf1?? Qf3-+ 42.Ke1 Qg3 43.Kd2?? Qf2 44.Kc1 Rh3-/+ 45.Qc2?? Rh1 46.Kb2-/+ Qb6 47.Qb3?? Rb1!!-+ 48.Kb1 Qb3 49.Kc1 Qb7 50.Rc4 Qb3 51.Rc7 Qe3 52.Kd1 Qe4 (53.Rc2 Qa4-+; better is 52...Qg1 53.Kd2 Qh2 54.Ke3 Qc7 55.Kd4-+) 0–1. Ruhle,E – Weibrecht,C, Bad Wildbad, 1993.

5.b5 (--> 3.b5 a6 4.a4 c6 5.e3).

5.Nf3 Nf6 6.b5=.

5.Nf3 Nf6 6.b5 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.Nf3).

5.Nf3 h6 6.b5 ab5 7.ab5 Ra2?? (better 7...Ra1 8.Ba1 Nf6=) 8.Ra2+- Nf6 9.Be2 (9.Ra8 Bd6+-) 9...Rg8 (9...Bd6 10.Be5+-) 10.0-0 (10.Ra8 Nbd7+-) 10...Qc7 (10...Bd6 11.Ra7+-) 11.Be5 Bd6 12.d4 (12.Bd6 Qd6 13.d4 cb5+-) 12...Be5 13.Ne5 Nbd7 14.f4 (14.Nd7 Bd7 15.bc6 Bc6+-) 14...Ne5 (14...Ne4 15.Bd3+-) 15.fe5 Ne4 16.Ra8 b6 (16...Ke7 17.Bd3+-) 17.bc6 Qc6 (17...f6 18.Bb5 Ke7+-) 18.Bb5! Qb5 19.Rc8 Ke7 20.Rg8 g6 21.Rg7 (better 21.Qf3 f5 22.ef6 Kd7+-) 21...Ng5 22.h4 1–0. DEFFM – GuestJNFP, freechess.org, 2018.

5.b5 Na5 6.Nf3 Bb4?? 7.Bg7+- f6 8.Bh8 Bd7 (8...Nh6 9.Bd3+-) 9.ba6 ba6 10.Bd3 (10.Ne5 fe5 11.Qg4 Nh6 12.Qb4 Nc6+-) 10...Qe7 11.Nd4 (better 11.e4 h6 12.e5 f5+-) 11...0-0-0 (11...Qf7 12.f4+-) 12.Ba6 Kb8 13.Qh5 (13.c3 Bd6 14.Qf3 f5+-) 13...Qd6 (13...e5 14.c3 Bc5 15.Nf3+-) 14.Bd3 e5 15.Nf5 Bf5 (15...Qe6 16.Qh7 e4 17.Nd4+-) 16.Qf5 Ne7 (16...h6 17.Ra2+-) 17.Qf6 (better 17.Qh7 e4 18.Be2 Rg8+-) 17...Qd7 (17...Nec6 18.Bg7 Qf6 19.Bf6+-) 18.Qa6 (better 18.Qe5!? Qg4 19.Qd4 h5+-) 18...Nec6 (18...Rh8 19.Qf6 Rg8 20.Qe5 Rg2 21.Nc3+-) 19.Nc3 (better 19.Qb5 Kc8 20.Bf6 Rg8+-) 19...Bc3 (19...Rh8 20.Rb1 Qc8 21.Qb5 Qb7 22.Qb7 Nb7+-) 20.dc3 Rh8 21.Rb1 (21.Rb1 Nb4 22.Rb4 Qb5 23.Rb5 Nb7 24.Qb7) 1–0. DEFFM – GuestMWNW, freechess.org, 2018.

5.b5 Nb4?? 6.c3+- ab5 7.cb4 ba4 (7...Nf6 8.Bb5 c6 9.Be2 Bb4 10.Nf3+-) 8.Ra4 Ra4 9.Qa4 Bd7 10.Qa5 (10.Qa7 Bc8+-) 10...b6 11.Qa7 Bb4?? (better 11...Ne7+-) 12.Ba3 (better 12.Bg7 Nh6 13.Bh8+-) 12...Ba3+/- 13.Qa3 Ne7 (13...c5 14.d4 c4 15.Nc3+/-) 14.Qb3 (14.Qc3 0-0+/-) 14...0-0 15.Bb5 (15.Nf3 c5+/-) 15...Bc8 (15...e5!?+=) 16.Nf3 h6 (16...c6 17.Be2+/-) 17.d4+- Ng6 (17...Bd7 18.Bd7 Qd7 19.0-0+-) 18.h3 (18.Qc2 Qd6+-) 18...Qd6 19.0-0 Bb7 (19...c5 20.Nc3+-) 20.Nbd2 (20.Bd3!? f5+-) 20...c5+/- 21.dc5 Qc5 (21...bc5 22.Rc1+/-) 22.Be2 (22.Rb1 Rd8+-) 22...e5 (22...Ra8 23.Rb1 Ba6 24.Bd1+-) 23.Rb1 e4 (23...Ra8 24.Qb6 Qb6 25.Rb6+-) 24.Nh2 (24.Nd4 Ra8+-) 24...Nh4 (24...Ra8 25.Qb6 Qb6 26.Rb6+-) 25.Qb6 Qc2 26.Qb2 (better 26.Nhf1 Bc6 27.Qc7+-) 26...Qa4?? (26...Qb2 27.Rb2 Bc6+-) 27.Qb7 Qa5 28.Rb5 (better 28.Nhf1 Qa8 29.Ng3+-) 28...Qd2 29.Bf1 Nf3 (29...d4 30.Rd5 Qc3 31.Rd4+-) 30.Nf3 (better 30.gf3 Rd8+-) 30...ef3 31.gf3 Qc3 (31...Rd8 32.Qe7 Ra8 33.Qe5+-) 32.Rd5 Qf6 33.Bg2 Qa1 34.Kh2 Qe1 (34...Qf6 35.f4+-) 35.Rf5 (better 35.Qb2!? Rc8+-) 35...Qf2 36.e4 Qa2 37.h4 (37.Qd7 Qc2+-) 37...Qf2 38.Kh3 Qg1 (38...Qd2 39.Qe7+-) 39.e5 (39.Ra5 Qe3+-) 39...Qe3 40.Qe7 g6 (40...Qe2+-) 41.Rf6 Qd4 42.e6 h5 (42...Qd8 43.Rf7 Qe7 44.Re7 Rf6 45.Re8 Kg7+-) 43.ef7 (43.ef7 Kg7 44.Rg6 Kg6 45.Qf8 Qd7 46.Kg3 Qf7 47.Qd6 Qf6 48.Qd3 Kh6 49.Qe3 Kg6 50.f4+-) 1-0. upep – Orangebuck, Rated Classical game, lichess.org, 2013.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Na7 8.c4 dc4? (better 8...Bd7 9.Qa4 Nc8+=) 9.Qa4+- Nf6 (better 9...c6 10.Qa7 cb5+-) 10.Qa7 Bb4 (10...Nd5 11.Bc4 Nb6 12.Bf1+-) 11.Bc4 Ne4 12.Nf3 f6 13.Qa4 Qd6 (13...Be7 14.d4+) 14.0-0 0-0 15.Nc3 (15.h4 f5+-) 15...Bc3 16.dc3 Kh8 (16...Rd8 17.Qc2 Nd2 18.Nd2 Qd2 19.Qb3+-) 17.Rd1 Qe7 18.Bb2 Qf7 (18...Rd8 19.Rd8 Qd8 20.Be2+-) 19.Qa2 (19.Be2 f5+-) 19...Ng5 (19...Bd7 20.Be2 Nd6 21.Qb3+-) 20.Nd4 (20.Ng5 fg5 21.Ba3 Re8+-) 20...Re8 21.f4 Ne4 22.Qb1 (22.Bd3 Qh5 23.Ra1 Nd6+-) 22...Nd6 23.Bb3 White plans f5 23...Bd7 (23...Qe7 24.Ba3 e5 25.Bd6 cd6 26.fe5 Qe5 27.Re1+-) 24.Qd3 (24.b6 c5 25.Qd3 c4 26.Bc4 Qh5+-) 24...Rd8 (24...Qh5 25.c4 e5 26.fe5 Qe5 27.Re1+-) 25.f5! Qh5 (25...Nf5 26.Ne6 Decoy; 25...ef5 26.Bf7 Pinning (26.Bf7 Deflection)) 26.fe6 Be8 27.e7 (27.b6 Bg6 28.bc7 Re8+-) 27...Ra8 (27...Rd7 28.Ne6 Bg6 29.Qd4 Re7 30.b6+-) 28.Ne6 Rc8 (28...Bg6 29.Qd2 Bf7 30.b6+-) 29.Nc7! (29.Nc7 Nf5 30.Ne8 Re8 31.Qd7 Ne7 32.Ba3+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Na7 8.Qg4 b6?? (better 8...Nf6 9.Qa4 Bc5+=) 9.Qa4+- Nb5 10.Bb5 Bd7 11.Nf3 (11.Nc3 Nf6+-) 11...Bb5 12.Qb5 Qd7 13.Qa6 Bd6 (13...f6+-) 14.Bg7 1–0. DEFFM – GuestGDBJ, freechess.org, 2019.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Nce7 8.Nf3 Nf5 9.Bd3 Be7?? (better 9...Nf6=) 10.Bf5+- ef5 11.Bg7 Bf6 12.Bh8 Bh8 13.0-0 b6 (13...Nf6 14.d3+-) 14.Nc3 Be6 15.Ne2 Qf6 (15...Ne7 16.Nfd4+-) 16.Nfd4 Ne7 17.Qa1 c5 (17...Ng6 18.Qc3 Qd8 19.Ra1+-) 18.bc6 Nc6 19.Qa8 Kd7 (19...Nd8+-) 20.Qc6 (20.Qc6 Ke7 21.Nf4+-) 1–0. DEFFM – guestgemini, freechess.org, 2019.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Nce7 8.Nf3 Ng6 9.d3 c6 10.bc6 bc6 11.Nbd2 Ba6 (11...Nf6 12.Be2=) 12.Be2 Nf6 13.0-0 Be7 14.Nb3 (14.c4 0-0+=) 14...0-0= 15.h3 (15.Ne5 Ne5 16.Be5 Qb6=) 15...Bb5 16.Qd2 Nd7 (16...Qd6 17.Rb1=) 17.Nfd4 Qb8 (17...Ba4 18.Bb2=) 18.Rb1 Ba4 19.Qa5 (19.Qc3 Bf6 20.Nc6 Qc8+=) 19...Qa8 20.Qc7 (20.Bc3 Qa5 21.Na5 c5=) 20...Nge5 (better is 20...c5!? 21.Nf3 Rc8-/+) 21.f4 Rc8 22.Qa5 Qa5 23.Na5 Ng6 24.Nab3 (24.f5 ef5 25.Nf5 Bf8=) 24...c5 25.Nf3 c4 (25...Ra8 26.Bc3=) 26.dc4 dc4 27.Nbd4 Bf6 (27...Bc5 28.Kf2=) 28.Rb4+= Exerts pressure on the isolated pawn 28...Bd4 (28...Ra8!?+=) 29.Nd4+/– (worse is 29.Bd4 Bc2 30.Bc4 Nb8+=; worse is 29.ed4 Bc2 30.Bc4 Nf4-/+) 29...Rd8?? (29...Ra8 30.Rc4 e5 31.fe5 Nge5 32.Rc7+-) 30.Bc4 (better is 30.Ra4 Nb6 31.Ra7+-) 30...Nc5 (30...Ra8 31.Rb7+-) 31.Bd3 (31.Ne6!? fe6 32.Bd4 Bc2 33.Bc5 Nf8+-) 31...Ne7 32.Kf2 Nd5 33.Rc4 Nd7?? (33...Nd3 34.cd3 Bd7 35.Kf3+/–) 34.Bb2 (better is 34.Ra4 Nc5 35.Ra7+-) 34...N7b6 35.Rc5 g6 (35...Ra8 36.Be4+-) 36.Bb5 (better is 36.c4!? Nb4 37.Be2+-) 36...Bb5+/– 37.Rb5 (worse is 37.Nb5 Na4 38.Bd4 Nc5 39.Bc5 Rc8-/+) 37...h5?? (better is 37...Nc4 38.Nc6 Ra8+/–) 38.e4+- Na4 39.ed5 Nb2 40.Rb2 ed5 (40...ed5 41.Rb7 Kf8+-). Tilp,Andreas – Luedecke, corr DDR, 1988.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Nf6?? 8.bc6+- bc6 9.Nf3 Bd6 10.c4 0-0 11.Nc3 Bb4 (11...Ba6 12.Qc2+-) 12.Qb3 Qe7 13.Be2 Ba6 14.cd5 Be2 15.Ne2 Nd5 (15...cd5 16.0-0+-) 16.Qc2 c5 17.0-0 Ra8 18.Ne5 Qg5 (18...f6 19.Nd3+-) 19.f4 Qh5 (19...Qe7 20.e4 Nb6 21.Rb1+-) 20.Ng3 Qh6 (20...Qh4 21.Nd3+-) 21.Bb2 Nf6 (21...f5 22.Nd3+-) 22.Ra1 Ra1 (22...Re8 23.Ra6+-) 23.Ba1 Ng4 1–0. GuestMJRN – GuestZWLP, freechess.org, 2017.

5.b5 a5 6.Nf3+= Bb4?? (better 6...Nf6+=) 7.Bg7+- 1–0. GuestNDSG – GuestLBMK, freechess.org, 2020.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4+= dc4 9.Bc4 Nf6 (9...Bc8 10.Nf3+=) 10.Nf3 (10.Be5 Ne4+-) 10...Qb6 The isolani on b5 becomes a target (10...Bc8 11.0-0+=) 11.Nc3 Be7 (11...Bd6 12.0-0+-) 12.Ne5 (12.0-0!?+-) 12...0-0 13.Nd7 (13.0-0!?+=) 13...Nbd7= 14.0-0 Rd8 15.Na4 (15.f4 Qd6=) 15...Qd6 16.Qc2 Ne5 17.Be5 Qe5 18.Nc3 Nd5 (18...Ra8 19.f4 Qd6 20.Ne4 Ne4 21.Qe4=) 19.f4 Qd6 20.Ne4 Qd7 21.Qb3 (21.g4 Qc7=) 21...b6 22.Rf3 Nb4 (22...Nf6 23.Ng5 Qd6 24.Rf1=) 23.Rg3 (23.f5 Nd5+=) 23...Kf8 24.Qb2 f6 25.Rh3 h6 26.Rg3 Nd5 27.Rg6 (27.Kf2 e5 28.Rf3 ef4 29.ef4 Qc7=) 27...Kf7 (better 27...e5!? 28.fe5 Qf5 29.Bd5 Qg6-/+) 28.Rg3= Ra8?? (better 28...Kf8=) 29.f5!+- ef5?? (better 29...Nc7 30.Qb3 Kf8 31.fe6 Qd8+-) 30.Nc3 (30.Nc3 Kf8 31.Nd5+- (worse 31.Bd5 Rd8+-)) 1–0. GuestMPZD – GuestMVVY, freechess.org, 2019.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3 f6 9.Bd3 e5 10.Ne5 fe5 11.Qh5 g6?? (better 11...Ke7 12.Qe5 Kf7 13.Qh5 Ke7 14.Qe5 Kf7 15.Qh5 Ke7 16.Qe5=) 12.Bg6! hg6 13.Qg6 (13.Qh8?! Be6 14.Qe5 Qd6+/-) 13...Ke7 14.Be5 Rh6?? (14...Bf5 15.Qf5 Rh6+-) 15.Bd6 1-0. DEFFM – moondher, freechess.org, 2021.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Nf6!?=.

5.Nf3 Nc6 6.b5 ab5 7.ab5 Ra1 (7...Na5 8.Ne5+=) 8.Ba1 (better 8.bc6!? Ra5 9.cd7 Qd7 10.Ne5+/-) 8...Na7= 9.c4 (9.b6!? cb6 10.Ne5=) 9...dc4=+ 10.Ne5 Bb5 (better 10...Nb5!? 11.Bc4 Nd6=+) 11.Qf3+= Nf6 12.Qb7 Bc5 13.Nc3 0-0?? (better 13...Bd7+/-) 14.Nb5+- Nb5 15.Qb5 (15.Bc4?! Nd6 16.Qf3 Nfe4=) 15...Bd6 (15...Qa8 16.Bb2 (worse 16.Qc5 Qa1 17.Ke2 Rd8+-) 16...Be3 17.Nc6+- (worse 17.de3 Rb8 18.Qb8 Qb8 19.Nc4 Ne4-+)) 16.Nc6 (worse 16.Bc4 Qa8 17.0-0 Rb8+-) 16...Qa8 17.Bf6 gf6 18.Be2 (better 18.Qc4!? Qa1 19.Ke2 Ra8+-) 18...Qa1 19.Bd1 c3 20.dc3 Qc3 21.Ke2 Ra8 22.Kf3 f5 23.Bb3 (23.Be2 Ra2 24.Qc4 Qc4 25.Bc4 Rc2+-) 23...e5 (better 23...Ra3 24.Rb1 Ra8+-) 24.g3 Ra3 (24...e4 25.Kg2 Qf6 26.Rd1+-) 25.Nd4! c6 (25...ed4 26.Qe8 Mate attack) 26.Qb7 e4 (26...Rb3 27.Nb3 (27.Qb3?! ed4 28.Qc3 dc3+-) 27...Bb4 28.Na1+-) 27.Kg2 Rb3 28.Nb3 Kg7 (28...c5 29.Rc1 Qe5 30.Qc8 Kg7 31.Nc5+-) 29.Nd4 Kg6 (29...Kg8 30.Qc8 Bf8 31.Rb1+-) 30.Qc8 Qc5 31.Qg8 Kh6 (31...Kf6 32.Qh8 Kg6+-) 32.Qf7 Qe5 33.Nf5 (33.Nf5 Qf5 34.Qf5 Be7 35.Qe6 Kg7 36.Qe7 Kg6 37.Qd6 Kg7 38.Rb1 Kg8 39.Rb7 c5 40.Qd8) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.Nf3 Nf6 6.b5 ab5 7.ab5 Ra1 8.Ba1 c6 9.c4 (9.Be2 cb5 10.0-0 Be7=) 9...dc4=+ 10.Bc4 cb5 11.Bd3 Be7 12.0-0 Bc6 13.Qc2 Na6 14.Bc3 Nc5 (14...Nb4 15.Bb4 Bb4 16.Nd4=+) 15.Be2 0-0 (15...Bd6 16.Nd4 Qd7 17.Nc6 bc6 18.Bf3=) 16.Ne5 (16.Bf6 gf6 17.d4 Ne4=) 16...Qb6 (16...Nd5 17.d4 Nd7 18.Bd3 Ne5 19.de5 Nc3 20.Nc3=+) 17.Bb4 (better 17.Rc1 Rc8 18.Bd4=) 17...Nfd7?? (better 17...Nd5 18.Bc5 Qc5 19.Qc5 Bc5=+) 18.Nd7 Bd7 19.d4 1–0. GuestWTJX – GuestDCVZ, freechess.org, 2019.

5.b5 c6 6.c4 dc4 (6...ab5!? 7.ab5 Ra1 8.Ba1 Bd6=) 7.Bc4+- Bd7 (7...ab5!? 8.ab5 Ra1 9.Ba1 cb5 10.Qh5 Ke7 11.Qb5 Qd7+-) 8.Nc3+- cb5 (8...ab5!? 9.ab5 Ra1 10.Qa1 Bb4+-) 9.ab5 a5 (9...ab5 10.Ra8 (10.Nb5?! Ra1 11.Ba1 Nc6+-; 10.Bb5?! Ra1 11.Ba1 Ne7+=) 10...bc4 11.Qg4+-) 10.Nge2 Bc5 (10...Nh6 11.0-0+-) 11.Nf4 Qc8 (11...Kf8 12.Qh5 Be7 13.Be6+-) 12.Qh5 Kf8 13.Be6! Be6 (13...Be6 14.Qc5 Combination) 14.Qc5!! Ne7 (14...Qc5 15.Ne6 Double attack (15.Ne6 Decoy)) 15.Ba3 Qd7 (15...Qc5 16.Ne6 (16.Bc5?! Kf7+-) 16...Kf7 17.Nc5+-) 16.Ncd5 Bd5 (16...Kf7 17.Nb6 Qe8 18.Na8+-) 17.Nd5 b6 (17...Kf7 18.Ne7 g6+-) 18.Nb6 Qa7 19.Na8 Qc5 20.Bc5 Nd7 21.d4 Kf7 22.Ra5 Nd5 (22...Rb8 23.Be7 Ke7 24.Kd2+-) 23.Ra7 Ke6 24.e4 (24.e4 Nf4 25.Nc7 Kf7 26.Na6+-) 1–0. DEFFM – GuestGPTJ, freechess.org, 2019.

5.b5 Bd7 6.c4 a5? (better 6...ab5 7.cb5 Nh6+=) 7.cd5+- ed5 (7...Bd6 8.Bc4 e5 9.Nc3+-) 8.Qh5 g6 9.Qd5 c6 (9...Bf5 10.Qb7 Nd7 11.Nc3+-) 10.Qb3 Bb4 11.Bc4 Qe7 (11...Nh6+-) 12.Bg8 1–0. DEFFM – GuestRXCF, freechess.org, 2019.

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4).

5.b5 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3).

5.b5 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 a6 6.a4).

5.Qc2 Nf6 (5...b5 6.a3-/+) 6.Qc4 b5 (6...Nc6 7.a3=+) 7.Qb3 Nc6 8.a3 Be7 9.Nf3 0-0 10.Be2 Bb7 11.0-0 Nd5 12.d4 (12.Nc3 Nf6=) 12...Bf6 (12...Bd6 13.Rc1=) 13.Rd1 g6 (13...Nce7 14.Qc2+=) 14.Nbd2 Nce7 15.Ne4 Bg7 16.Nc5 Bc6 17.Ne5 Qc8 18.e4 Nb6 19.Bf3 Be5 20.de5 Nc4 21.Rd3 (21.Bd4 Rd8+-) 21...Nb2 22.Qb2 Bb7 (22...Rd8 23.Rd8 Qd8 24.Rd1+-) 23.Rad1 Nc6 24.Nd7 Rd8 25.h4 (25.Nf6 Kg7+-) 25...h5? (25...Kg7 26.Be2+-) 26.g4 (better 26.Bh5 Kg7 27.Be2+-) 26...hg4+- 27.Bg4 Kg7 28.Qc1 Nb8? (28...a5 29.Qg5 Rh8 30.Nc5+-) 29.Nf6 White intends h5 (better 29.Nb6! cb6 30.Rd8 Qc1 31.Rc1+-) 29...Rd3+- 30.Rd3 c5 (better 30...a5+-) 31.h5 Qh8 (31...Nc6 32.Qc5 Qb8+-) 32.h6! (32.bc5 Be4 33.Rh3 g5 34.Qg5 Kf8 35.Ne4 Nc6+-) 32...Qh6 33.Ne8 Kh7 34.Rh3 Qh3 35.Bh3 Be4 (35...Nc6 36.Nd6 cb4 37.Nf7+-) 36.Qc5 (36.Qf4 Nd7 37.Qf7 Kh6 38.Qg7 Kg5 39.Qe7 Kf4 40.Qh4 Ke5 41.Qg5 Kd4 42.Qe3 Ke5 43.f4 Kd5 44.Qd2 Bd3 45.Qd3 Kc6 46.Qd6 Kb7 47.Qc7) 36...Nc6 (36...Nd7 37.Qe7 Ne5 38.Nf6 Kh6 39.Ne4 Nf3 40.Kg2 Ne1 41.Kg3+-) 37.Qf8 (37.Qf8 Re8 38.Qf7 Kh6 39.Qe8+-) 1–0. Karlsen,Jan M – Gusland,Thorleif, Sandefjord MGP, Gr. B, 2002.

5.Bc4 Nf6 6.b5 ab5 7.Bb5 Bd7 8.Nc3 Bb5 9.Nb5 c6 (9...Be7 10.Nf3=+) 10.Nd4 (10.Bf6 gf6 11.Nc3 b5=) 10...Be7 11.Qb3 Qc7 (11...Nbd7 12.Bc3 (12.Qb7? Rb8 13.Qc6 Rb2-+) 12...Nc5 13.Qb1=+) 12.Nge2 (12.Ngf3 0-0=) 12...Nbd7 13.0-0 0-0 14.h3 (14.d3 Rfd8 15.Qc2 Nc5=+) 14...Nd5 (14...Rfd8 15.Qc2=+) 15.Rfc1 (15.e4 N5f6 16.Ng3 Rfd8=+) 15...Bf6 (15...Nc5 16.Qc4=+) 16.Nb5 Qd8 17.Bf6 Qf6 (worse 17...gf6 18.e4 Ne7 19.Qg3 Kh8 20.Nd6+=) 18.Nd6 Rab8 (18...Rfb8 19.d4= (worse 19.Nb7 Ra7-/+)) 19.d4 Attacking the backward pawn on b7 (19.Rab1 N5b6+=) 19...Qe7 20.Ne4 N7f6 (20...e5 21.N4g3=) 21.Nf6 Qf6 22.Ng3 (22.a4 Rfd8+=) 22...g6 (22...Rfc8 23.Rab1=) 23.a4 Qg5 (23...Rfd8 24.a5+=) 24.a5 Qe7 25.Rc5 (25.Ne4 Rfd8+-) 25...Rfd8+= 26.Rb1 Qc7 27.Qa2 (27.Qd3 Ra8+=) 27...b6 (better 27...Ne3!? 28.fe3 Qg3=+) 28.ab6+- Rb6 29.Rb6 Qb6 30.Qc4 Rc8 31.Ne4?? (31.Qc1 Nb4 32.Rc4 Qb5+=) 31...Kg7?? (better 31...Qb1 32.Kh2 Qe4 33.Rc6 Rc6 34.Qc6 h5-+) 32.Nd6+- Ra8 33.e4 (better 33.Rc6!? Qb2 34.Ra6 Ra6 35.Qa6 Qc1 36.Qf1+-) 33...Ra1 (33...Nf4!? 34.Rc6 Qb2=) 34.Kh2+= Nf4 35.Rc6 (35.Qc2!?+=) 35...Qb1= 36.Rc7?? (36.Kg3 Nh5 37.Kh4-+) 36...Qg1 37.Kg3 Qg2 38.Kf4 Qh2 (38...Qf2 39.Ke5 Qf6) 39.Kg4?? (39.Ke3 Ra3 40.Ke2 Qd6 41.d5-/+) 39...Qd6 (better 39...h5 40.Kf3 Qh3 (40...Qd6?! 41.Qc5 Qh2 42.Qe5 Qe5 43.de5=+) 41.Ke2 Qf1 42.Kd2 Qf2 43.Kc3 Rc1 44.Kb4 Rc4 45.Kc4 h4-+) 40.e5? (40.Qc5!? h5 41.Kf3=+) 40...Rg1 (40...Qd8 41.Qc3 Ra2 42.h4 Rf2 43.Kg3-+) 41.Kf3=+ Qa3 42.Qc3 Qa8 (better 42...Qa6=+) 43.Kf4 (43.Qc6 Qa5 44.Qb7=+) 43...g5=+ 44.Ke3 Re1?? (44...Rh1 45.Kd2 Qa2 46.Qc2 Qa1 47.Rf7 Kf7 48.Qh7 Ke8 49.Qg6 Kd7 50.Qf7 Kd8 51.Qf8 Kc7 52.Qd6 Kb7 53.Qe7 Ka8 54.Qe8 Ka7 55.Qd7 Kb6 56.Qe6 Kc7 57.Qe7 Kb8 58.Qd8 Kb7 59.Qd7 Ka6 60.Qc6 Ka5 61.Qc5 Ka4 62.Qa7 Kb4 63.Qb6 Kc4 64.Qc5 Kb3 65.Qb6 Ka2 66.Qa6 Kb1 67.Qa1 Ka1+-) 45.Kd2 (better 45.Qe1 Qg2 46.h4 gh4 47.Rc1+-) 45…Qe4-+ (45...Qe4 46.Qc4 Ra1 47.Rf7 Kf7 48.Qc7 Kg6-+) 0–1. Abdullaevich (1895) – sanjhony (1885), lichess.org, 2020.

5.Bc4 Qg5 6.Nf3 Qd8 (6...Qg4 7.Be2=) 7.0-0 Nf6 8.a3 Be7 9.Nc3 0-0 10.Qc2 h6 (10...b5 11.Be2+=) 11.d4 c6 12.Rfd1 b5 13.Bf1 (13.Bd3 a5+/-) 13...Bb7 14.Nd2 a5 15.ba5 Ra5 16.Nb3 Ra8 17.Ne2 (17.a4 b4 18.Ne4 Ne4 19.Qe4 Qd5+=) 17...Qb6 (17...Nbd7 18.Ng3+=) 18.e4 Nbd7 19.Kh1 (19.Nc3 Rfc8=) 19...Rfc8 20.Ng3 (20.Nc3 c5 21.Bb5 Be4 22.Ne4 Qb5 23.Nec5 Bc5 24.dc5 Nc5 25.Nc5 Rc5= (25...Qc5?? 26.Rd8 Rd8 27.Qc5+-)) 20...c5 21.d5? (better 21.dc5!? Nc5 22.Nc5 Rc5 23.Qb3=) 21...ed5-/+ 22.e5 Ne8 23.Nf5 (23.Qf5 Rd8-/+) 23...Bf8-+ 24.Qe2 (24.f4 d4-+) 24...g6 (24...Qe6 A) worse 25.Qb5 Ba6 (25...Qf5?! 26.Qb7 Nc7 27.Bd3 Qf2 28.Rab1-+) 26.Nbd4 cd4 (26...Bb5?! 27.Ne6 Bf1 28.Nf8 Kf8 29.Rf1-/+) 27.Nd4 Bb5 28.Ne6 Bf1 29.Nf8 Nf8 30.Rf1 Rc2-+; B) 25.Qc2 Nc7 26.Rac1-+) 25.Nh4 ½-½. Nf3 (1885) - zoranmk (1910), Rated Classical game, lichess.org, 2013.

5.a3 Nf6 6.d4 Be7 7.c5 Nbd7 (7...b6 8.cb6 Qb6 9.Bc3=) 8.Nd2 Qc7 (8...0-0 9.Ngf3=) 9.Bd3 (9.Ngf3 a5=) 9...b5 (9...e5 10.e4=) 10.f4 (10.a4 Rb8+=) 10...h6 (10...a5 11.Ngf3=) 11.g4 (11.Ngf3 a5+=) 11...Nh7 (11...a5 12.Qf3=) 12.h4 (12.a4 ba4 13.Ngf3 Nhf6+=) 12...Bb7 (12...a5 13.Ngf3=) 13.Ngf3 White prepares the advance g5 13...g5? (better is 13...a5=) 14.hg5+- 0-0-0 (14...hg5 15.Rh7 Rh7 16.Bh7 gf4+-) 15.gh6 (15.Rh6?! Ng5 16.fg5 Qg3 17.Kf1 Bg5+/–) 15...Rdg8 16.g5 Ndf8 (16...Ng5 17.fg5 (17.Ng5?! Bg5 18.fg5 Qg3 19.Kf1 Qg5+-) 17...Qg3 18.Kf1 Bg5 19.h7+- (19.Ng5?! Qg5 20.Qf3 Rh6 21.Rh6 Qh6+-)) 17.Ne5 (17.Qc2 f5+-) 17...Bd8 (17...Ng5 18.fg5 Bg5 19.h7+-) 18.Qh5 Qe7 (18...f6 19.Nf7 fg5 20.Nh8 Rh8+-) 19.Nf7 e5 (19...Nd7 20.a4+-) 20.de5 Kb8 21.Nh8 Rh8 22.g6 Ng6 (22...Rg8 23.gh7 Nh7 24.e6+-) 23.Qg6 Nf8 24.Qf6 (24.Qd6 Ka7 25.e6 Qe8+-) 24...Rg8 25.h7 Nh7 26.Qe7 Be7 27.Rh7 Bf8 28.0-0-0 Bg7 29.Rg1 Bc8 30.Rgg7 Rf8 31.Nb3 d4 32.Nd4 Rd8 (32...Bd7 33.Rd7 Rc8 34.Rb7 Ka8 35.Ra7 Kb8 36.Rhb7) 33.Nc6 1–0. bentengutama (1900) – bienopia (2125), net–chess.com, 2003.

5.a4 dc4 6.Bc3 +=.

5.a4 Nd7 6.Nf3= Ngf6 (6...Bb4?? 7.Bg7 dc4 8.Bc4+-) 7.c5 (7.Qb3 dc4 8.Bc4 Nb6=) 7...b6 (7...a5 8.d4 ab4 9.Nbd2+=) 8.d4 Bb7 (8...bc5 9.bc5 Rb8 10.Qc2=) 9.Be2 (9.a5 bc5 10.dc5 Rb8+=) 9...b5 (better is 9...a5!?+=) 10.ab5 ab5 11.Ra8 Qa8 12.0-0 g6 (12...Be7 13.Nc3+=) 13.Nbd2 Bg7 14.Qa1 0-0 15.Qa5 Qa5 16.ba5 Ne8 (16...Ra8 17.Nb3+=) 17.Ra1 Nc7 18.Bc3 (better is 18.Kf1!?+=) 18...Nc5= 19.dc5? (better is 19.Bb4 N7a6 20.Ba3=) 19...Bc3-+ (19...Bc3 20.Ra2 Na6-+) 0–1. zabazaba (1655) – borisrub (1710), gameknot.com, 2013.

5.c5 Nf6 6.Qf3 (6.a3 a5=) 6...Nbd7 7.Bd3 (7.d4 b6=) 7...g6 (7...b6 8.cb6 Qb6 9.a3-/+) 8.Ne2 (8.Be2 a5 9.a3 e5=+) 8...Bg7 (better 8...a5 9.a3 e5=+) 9.Nbc3?? (9.0-0 e5 10.e4 b6 11.cb6 Qb6=+) 9...0-0 (better 9...Ne5-+) 10.0-0?? (10.Nc1=+) 10...e5 (better 10...Ne5 11.Qg3 Nh5-+) 11.e4= d4 (11...de4 12.Be4 Ne4 13.Ne4=) 12.Na4 b5 13.cb6 Nb6 14.Nb6 (14.Nc5!?=) 14...Qb6=+ 15.a3 Bg4 16.Qg3 Rfe8 (16...Be2 17.Be2 Ne4 18.Qd3-/+) 17.h3 (17.f3 Be6 18.f4= (worse 18.Qe5 Bc4 19.Qd4 Qd4 20.Nd4 Bd3-/+)) 17...Be2-/+ 18.Be2 Ne4 19.Qd3 Nd6 20.Rac1 (20.Qc2-/+) 20...Nb7 (20...a5!? 21.Qb3 ab4 22.Qb4 Qb4 23.ab4 Ra2 24.Rc6 Rb2 25.Rd6 Rb4-+) 21.Qc4 (21.Bf3 Rec8=+) 21...Rec8 22.Bf3 Exerts pressure on the backward pawn 22...Nd6 23.Qc2 Rc7 (better 23...Rab8-/+) 24.Bc6?? (better 24.Rfe1-/+) 24...Rac8-+ 25.Qa4 Rc6 26.Rc6 (26.d3 Bh6 27.Rce1 Rc2-+) 26...Rc6 (26...Qc6 27.Qc6 Rc6 28.d3-+) 27.Re1 (27.d3 Qb5 28.Qb5 ab5-+) 27...e4 28.d3 ed3 29.Qd1 Rc8 (29...Rc2 30.Bc1-+) 30.Qd3 Nf5 (30...a5 31.Qb3-+) 31.Re4 Rd8 32.g3 (32.Re1 Qb5 33.Rd1 Qd3 34.Rd3 Rc8-+) 32...Nd6 33.Bd4 (33.Re1-+) 33...Bd4 (better 33...Ne4 34.Qe4 Bd4-+) 34.Rd4 Nb7 (34...Rd7 35.Rd5-+) 35.Rd8 Nd8 36.Kg2 (36.a4 Nb7-+) 36...Ne6 37.h4 h5 38.Qd2 Kg7 39.Qb2 Qd4 40.Qc1 (40.Qe2 Qd5 41.Kh2 Qd6-+) 40...Qe4 41.Kh3 (41.Kh2 Nd4 42.Qc3 Kh7-+) 41...Qf5 (41...Nd4 42.Qd1-+) 42.Kg2 Qg4 (42...Qd5 43.Kg1-+) 43.Qc3 Qd4 44.Qc1 Qe4 45.Kh3 f5 (45...Nd4 46.Qa1-+) 46.Kh2 Qe2 47.Kg2 Qe4 48.Kh2 Qg4 (48...Qf3 49.Qb2 Kf7 50.a4-+) 49.Qc8 f4 (better 49...Qe2 50.Qc3 Kf7-+) 50.Qd7 (50.Qd7 Kh6 51.Qd3-+). Swindler (1655) – Abhix, Rated Classical game, lichess.org, 2013.

5.a3 dc4 6.Bc4 Bd7 7.Nf3 c5 8.bc5 Bc5 9.0-0 Nc6 10.Qc2 Be7 11.h3 Rc8 12.Nc3 Na5 13.Be2= 0-0 14.Ne5 Nd5 15.Nd7 Qd7 16.Qd3 Rfd8 17.Nd5 Qd5 18.Qd5 Rd5 19.Bc3 Nc4 20.Bc4 Rc4 21.Rfb1 b5-/+ 22.Kf1 Ra4 23.Rb3 Rd7 24.Ke2= Rb7 25.Kd3 Rc4=+ 26.f4 26...Rd7 27.Ke2 Bf6 28.a4 ba4=+ 29.Rb6 h6 30.Bf6 gf6 31.Ra6 Rc2 32.Rd1 Ra2 33.g4 Kg7 34.Kf3 Rd3 35.Ra7 f5 36.gf5 ef5 37.Rg1 Kf6 38.Ra6 Ke7 39.Rc1 Rdd2=+ 40.Rc7 Rd7 41.Rc5 Rd6 42.Ra7 Ke6 43.Rcc7 f6 44.Rc5 a3 45.Raa5 Rh2 46.Kg3= White fights for the Initiative 46...Rdd2 47.Ra6 Kd7 48.Rf5 a2 49.Rff6 Rh1 50.Rf7 Ke8 51.Rfa7 Rg1 52.Kf3 Rh1 53.Kg4 Rb2? 54.Re6 Kd8 55.Rf6 Ke8 56.Rc6?? Rd2? 57.Rca6?? Rd3?? 58.e4 h5 59.Kf5 a1Q 60.Ra1 Ra1 61.Ra1 Rh3 62.Ke6 Kf8 63.f5 Re3 64.e5 h4 65.f6 Kg8 66.f7 Kg7 67.Ra8 Rf3 68.Rg8 Kh7 69.f8Q (69...Rf8 70.Rf8+-) 1–0. Margraf,A – Schmiederer, Schwabenliga, 1989.

5.Qb3 dc4 6.Bc4 b5 7.Be2 Bb7 8.Nf3 (8.Bf3 Nc6 9.a3 Bd6=) 8...Be7 (8...Bd5 9.Qc3=+) 9.0-0 0-0 10.a4 (10.Bf6 Bf6 11.d4 Be7=) 10...Nbd7 (10...Bd5 11.Qd1=) 11.ab5 ab5 12.Nc3 Ra1 (12...Rb8 13.d4=) 13.Ra1+= c6 14.Ra7 (14.d4 Qb6+=) 14...Qb6 (14...Qb8 15.Ra2=) 15.Ra1 h6 (15...Qd8 16.d4+=) 16.d3 Nd5 Exerts pressure on the isolated pawn 17.Nd5 ed5 (17...cd5 18.Qc3 e5 19.Ra5+= (19.Ne5? Ne5 20.Qb3 Bd6-+)) 18.d4 (18.Bd4 Qc7+-) 18...Nf6 19.Ne5 Rd8 20.f3 (20.Nd3 Bc8+=) 20...Ne8 21.Nd3 Nd6 22.Nc5 Nc4 23.Nb7 (better 23.e4!?+=) 23...Qb7=+ 24.Bc3 (24.Bf1!?=+) 24...Ne3-/+ 25.Kf2 (25.Bd3 Re8-/+) 25...Nc4-+ 26.Bd3 Bd6 27.g3 Qd7 28.Re1? (better 28.Kg1-+) 28...Qh3 29.Kg1 Ra8?? (better 29...Bg3 30.Re2 Bf4 31.Bc4 bc4-+) 30.Qc2-/+ Qd7 31.Bf5 Qc7 32.Qe2 g6 33.Bd3 Kg7 34.Bc4 (34.f4 Qa7-+) 34...bc4-+ 35.Bd2 (35.Qe3 Ra3 36.Rb1 Qd7-+) 35...Rb8 (35...Ra3 36.Qf2-+) 36.Qe3 Rh8 (36...g5 37.Rb1-+) 37.Ra1 Qb8 38.Ra6 Qb7 39.b5 (better 39.Ra2!?-+) 39...Qb5 40.Ra7 Qb8 41.Rd7 (41.Ra1 Qb3-+) 41...Bg3! 42.Qe6 (42.hg3 Qg3 Combination) 42...Bh2 43.Kf1 (43.Kh1 Rf8 44.Qe7 Qg3 45.Bh6 Kh7-+ (45...Kh6?! 46.Qf8 Kg5 47.Qe7 Kh5 48.Qe5 Qe5 49.de5 Be5 50.Re7-+)) 43…Rf8 0–1. GuestNBGJ – GuestHFZY, freechess.org, 2017.

5.c5 Be7 6.Nf3 0-0 7.Qc2 Nc6 8.a3 Na7 9.Ng5 g6 10.h4 b6 11.h5 Nh5 12.Nh7 Re8 13.Be2 Bf6?? Black plans d4 (13...Nf6 14.Ng5 Rf8 15.Rh6+/–) 14.Rh5 (better is 14.Bh5 Bb2 15.Qb2 gh5 16.Qe5+-) 14...Bb2+/– 15.Qb2 d4?? (better is 15...gh5 16.Nf6 Kf8 17.Bh5 bc5+-) 16.Rh1 e5 17.Bc4 Bf5 18.a4 (18.Ba6?! g5 19.Bb7 Rb8+-) 18...g5 19.Ng5 (better is 19.Qb3 Bg6 20.e4+-) 19...Qg5+/– 20.g3 (20.Ba6 Qg2 21.Rf1 b5-+) 20...bc5 21.bc5 (21.Ba6?! Nc6 22.Bc4 Nb4= (worse is 22...cb4 23.Bd5 Qg6 24.Rh4=)) 21...de3 22.de3 Be4 23.Rh4 Qg6 24.Nd2 Bf5 25.Qb7 Qc6 26.Qa6 Qa6 27.Ba6 Nc8 28.Bb5 Re7 29.Ke2 Na7 30.Bc4 Nc6 31.Rah1 Ra4 (31...Kg7 32.Bd5 Ra6 33.Bc6 Rc6 34.e4+-) 32.Bf7! Kf7 (32...Rf7 33.Ra4 Discovered attack; 32...Kf7 33.Ra4 Discovered attack) 33.Ra4 Kg6 34.g4 Be6 35.f3 Bd7 36.Ra6 Re6 37.Kf2 Bc8 38.Ra8 Re8 39.Kg3 Ne7 40.Ne4 (40.Ra7 Nd5+-) 40...Rf8 (40...Nd5 41.Kf2+-) 41.Rh5 Nd5 (41...Nc6 42.Ra2 Bb7 43.Rah2+-) 42.Re5 Ne3 43.Rg5 Kh7 (43...Kf7 44.Ra7 Ke7 45.Rc7 Kd8+-) 44.Ra1 Rf6 (44...Rf3 45.Kf3 Bg4 46.Ke3 Bh3 47.Rh1 Kh6 48.Rh3) 45.Rh1 Rh6 46.Nf6 Kh8 47.Rg8 1–0. combijack (1815) – speediecees (1695), gameknot.com, 2013.

5.Bg7+- Bd2 6.Nbd2 +-.

5.Bg7+- f6 6.Bh8 Nh6 7.Nh4 Nf7 8.Qh5 Qe7 9.a3 Qf8 (9...Bd6 10.Qh7 Nh8 11.Qh8 Qf8 12.Qf8 Kf8 13.d4+-) 10.Bf6 (10.Bf6 Nd7 11.Bb2+-) 1–0. pcmvr (2845) – sgrant (2050), net–chess.com, 2011.

5.Bg7+- Nf6 6.Bh8 +-.

5.a3 Nf6 6.Be2 c5 7.bc5 (7.0-0 Nbd7=) 7...Bc5 8.0-0 0-0 9.Nc3 (9.a4 ba4 10.d4 Be7=) 9...Nc6=+ 10.d4 (10.Na2 Rb8=+) 10...Be7 (10...Bd6 11.Bd3=+) 11.Bd3 Bb7 12.h3 (12.a4 b4 13.Ne2 a5=+) 12...Rc8 (12...Na5 13.Qe2=+) 13.Ne2 Na5 (13...Qc7 14.a4 Nb4 15.ab5 Nd3 16.cd3 ab5 17.Qb1=+) 14.Bc3 Nc4 15.Bb4 Nb2 (15...Ne4 16.Qb1=+) 16.Qb1= Nd3 17.cd3 Rc7 (better 17...Re8=) 18.Ba5+- Qd7 (18...Bd6 19.Qb3+-) 19.Ne5 Qc8 20.Bc7 Qc7 21.Rc1 Qb8 22.Nc6 Bc6 23.Rc6 Qb7 (23...Qa8 24.Qc1+-) 24.Qc1 Bd8 (24...Qa8 25.Ra2+-) 25.Qc2 (25.Qc3 Nd7+-) 25...Ne8 (25...Be7 26.Rc7 Qb8 27.Qc6+-) 26.Rc1 Nd6?? (better 26...a5+-) 27.Rd6 (27.Rd6 Be7 28.Qc6 Qc6 29.Rdc6 Ba3 30.Ra1+-) 1–0. Pierre – Drainos, internet, 2020.

5.Be2 Bb4?? 6.Bg7+- f6 7.Bh8 Bd7 8.c3 Ba3 (8...Bd6+-) 9.Na3 Nc6 10.Nc2 (10.Qc2 Qe7 11.Nb1 e5+-) 10...Qe7 (10...Kf7 11.a4+-) 11.Ncd4 (11.a4 ba4 12.d4 Nh6+-) 11...0-0-0 12.Nc6 Bc6 13.Nd4 Bd7 14.0-0 (14.a4!? c5 15.ab5 cd4 16.Ra6 de3 17.fe3 Kb7+-) 14...Nh6 (14...c5 15.Nc2 c4 16.a4+-) 15.g3 (better is 15.a4 e5 16.ab5 ed4 17.Ra6 Rf8+-) 15...Rh8 16.a4! e5 (16...ba4 17.Ba6 Pinning (17.Ba6 Deflection)) 17.Nf3 Bh3 (17...e4 18.Nd4 c5 19.ab5 cd4 20.ba6+-) 18.Re1 e4 (18...Kd8 19.ab5 ab5 20.Ra8 Bc8 21.Bb5+-) 19.Nd4 Qd7 (19...c5 20.Nc6 Qb7 21.ab5+-) 20.ab5 ab5 (20...a5 21.Ra5 Nf7 22.Ra8 Kb7 23.Rh8 Nh8 24.Qa4+-) 21.Ra8 (better is 21.Bb5 Qb5 22.Nb5 Nf7+-) 21...Kb7 22.Rh8 Ng4 23.Nb5 (23.Qa1 c6 24.Qa8 Kb6 25.Ra1 Kc5 26.Qa3 Kb6 27.Ne6 Qe6 28.Qa7) 23...Qg7 24.Rh7! Qh7 25.Bg4 Kb6 26.Nd4 c5 (26...Kc5 27.Qa4 Kd6 28.Qc6 Ke7 29.Qd7 Kf8 30.Ne6 Kg8 31.Qe8) 27.Nf5 (27.Qb3 Kc7 28.Rb1 Kd6 29.Qb6 Ke7 30.Qc7 Ke8 31.Rb8) 27...Kb5 28.Bh3 (28.Qa1 Qb7 29.c4 Kb6 30.Rb1 Kc7 31.Qa5 Kb8 32.Qd8 Ka7 33.Ra1 Qa6 34.Qc7 Ka8 35.Ra6) 28...Qh3 29.Nd6 (29.Qb3 Kc6 30.Rb1 Qh2 31.Kh2 Kd7 32.Qd5 Kc7 33.Qd6 Kc8 34.Rb8) 29...Kc6 30.Nf7 f5 31.Qa4 Kc7 (31...Kb7 32.Rb1 Kc7 33.Qa7 Kc8 34.Rb8) 32.Rb1 (32.Qa7 Kc8 33.Rb1 Qh2 34.Kh2 f4 35.Rb8) 32...Qh5 (32...Qh2 33.Kh2 c4 34.Qb5 d4 35.Qb7) 33.Qa7 1–0. Fournier,Frederic (1785) – surviver (1800), Active, 2005.

5.Be2 f6 6.a3 Nd7 7.0-0 Bd6 8.Nd4 Ne5 9.f4 Nc4 10.Bc3 Ne7 11.Bc4 dc4 12.d3 (12.a4 e5 13.fe5 fe5 14.Qh5 g6+-) 12...Nd5= 13.Bd2 cd3 14.cd3 Bd7 (14...c5 15.Nc2=) 15.Nc3 Nb6 16.e4 Rc8 17.e5 Be7 18.Ne4 Nd5 19.Qf3 (19.Qg4 Kf7+/–) 19...0-0+= 20.ef6 Nf6 (20...Bf6 21.Nf6 Qf6 22.Qe4=) 21.Rac1 (21.Ng5 Re8 22.Nge6 Be6 23.Ne6 Qd7+/–) 21...Ne4 22.Qe4 Bf6 23.Bc3 c5 (23...Qe8!?+=) 24.Ne6+/– Be6 25.Qe6 Kh8 26.Bf6 (26.Qa6? Bc3 27.Qb5 cb4 28.ab4 Rf4-+) 26...Rf6 27.Qb3 (better is 27.Qe3!? cb4 28.Rc8 Qc8 29.ab4+/–) 27...Qd4= 28.Kh1 Rf4 29.Rf4 Qf4 30.Re1 (30.Qb1 c4=) 30...Rf8 (better is 30...cb4!? 31.Qb4 Rc1-/+) 31.h3= Qg3 32.Rd1?? (better is 32.Qe6=) 32...Rf2?? (better is 32...c4 33.Qc3 Rf2-+) 33.Qd5+/– Qf4 (better is 33...g6!?+/–) 34.Qd8+- Qf8 35.Qf8 Rf8 36.bc5 Rf6 (36...Kg8 37.d4 Rc8 38.g3+-) 37.d4 Kg8 38.d5 Kf8 39.d6 Ke8 40.c6 Kd8 41.g4 g5 ½–½. Valpa – Mrchess, playchess.de, 2005.

5.Be2 Nf6 6.a4 Bb4 7.ab5 0-0 =.

5.bc5 Bc5?? 6.Bg7+- f6 (6...Ne7 7.Bh8 Ng6 8.Bg7+-) 7.Bh8 e5 (7...Nh6 8.d4 Bb4 9.c3+-) 8.Nh4 (better 8.d4 ed4 9.ed4 Bb4 10.c3 Bd6+-) 8...d4 (8...Qc7 9.c4 dc4 10.Bc4+-) 9.Qh5 Ke7 (9...Kf8 10.Qh7 Qd5 11.Bd3+-) 10.Nf5 (better 10.Bc4!? Kd6 11.Qf7 Ne7 12.Qf6 Kc7 13.Qe5 Bd6 14.Qd4 b5+-) 10...Bf5 11.Qf5 de3 (11...Kd6 12.ed4 ed4 13.Qf4 Kd7 14.Bc4+-) 12.fe3 (12.Qh7 Kd6 13.de3 Nd7+-) 12...Nh6 (12...Nd7+-) 13.Bf6 (13.Bf6 Kf8 14.Qe5+-) 1–0. GuestLBTM – GuestCKFC, freechess.org, 2017.

5.bc5 Nf6 6.d4 Ne4 (6...b6 7.cb6 Qb6 8.Bc1+/–) 7.Bd3 b6 8.cb6 Qb6 9.Qc1 Qa5 10.Nbd2 Bb4 11.a3 Bc3 12.Bc3 Qc3 13.Be4 de4 14.Ne5 0-0 15.0-0 Bb7 16.Nec4 Bd5 17.Nb6 Ra7 18.Rb1 (better is 18.Na4!? Qa5 19.Nc5+-) 18...Rc7+/– 19.Nb3 Qc2 20.Nc5 Qe2 (20...Qc1 21.Rfc1 Bc6 22.Rc3+/–) 21.Qb2 (better is 21.f3 Rc5 22.dc5 ef3 23.Rf2+/–) 21...Qh5?? (better is 21...Qb2 22.Rb2 a5+/–) 22.Nd5+- ed5 23.Qb8 Rcc8 24.Qd6 Rfd8 25.Qa6 h6 26.Rb7 Qf5 27.h3 (27.f3 Ra8 28.fe4 Qe4 29.Ne4 Ra6+-) 27...Ra8 28.Ra7 Rab8 29.Qe2 Rb6 30.a4 Rg6 (30...Qg6 31.a5 Rbb8 32.Qg4 Qg4 33.hg4+-) 31.g4 (better is 31.f3!? Qh5+-) 31...h5 32.f3 hg4 (32...Qg5 33.fe4 hg4 34.h4 Qh4 35.Qh2 Qh2 36.Kh2+-) 33.fg4 Qh5 34.Qg2 (34.Kh2 Qh7+-) 34...Qh6 35.Qg3 Rf6 36.Rf6 Qf6 37.Nd7 (37.Qf2 Rd6+-) 37...Qc6 (37...Qh6 38.Rb7 Qg5 39.a5+-) 38.Ne5 (better is 38.Qc7 Qc7 39.Rc7 Ra8+-) 38...Qc1 39.Kg2 Rc8 (39...Rb8 40.Nd3! (40.Rf7?! Rb1 41.Qf2 Rb2=) 40...Qc2 41.Nf2+-) 40.Rf7 Rc3 (40...g5 41.Rf5 Qb2 42.Rf2+-) 41.Rf1 (better is 41.Qh4 Rc2 42.Rf2+-) 41...Qc2 (41...Qe3 42.Qe3 Re3+-) 42.Rf2 Qa4 43.Qf4 (43.Nf7 Qa7 44.Qh4 Qf7 45.Qd8 Kh7 46.Rf7 Rc2 47.Kg3 Kg6 48.Qd5 Rg2 49.Kg2 Kh7 50.Qf5 Kh6 51.Qh5) 43...Qa3 (43...Qe8 44.Qf5 Re3+-) 44.Qf7 Kh7 45.Qg6 (45.Qh5 Kg8 46.Ng6 Re3 47.Qh8) 45...Kg8 46.Nd7 (46.Qe8 Kh7 47.Qh5 Kg8 48.Ng6 Re3 49.Qh8) 46...Rc8 (46...Qe7 47.Nf6 Qf6 48.Rf6 Rc8 49.Rf7 Rc2 50.Kg3 Rg2 51.Kg2 Kh8 52.Qg7) 47.Rf7 (47.Nf6 Kf8 48.Nh5 Ke7 49.Rf7 Kd8 50.Qb6 Ke8 51.Qe6 Qe7 52.Qe7) 47...Rc2+- 48.Rf2 Rf2?? (48...Rc8 49.Nf6 Kf8 50.Nh5 Ke7 51.Rf7 Kd8 52.Qb6 Ke8 53.Qe6 Qe7 54.Qe7) 49.Kf2+- Qe7 50.Qf5 1–0. mikebaldini (1625) – baklja (1655), gameknot.com, 2014.

5.a3 b5 6.a4 Bb7 (better is 6...ba4!? 7.Ra4 Bd7= (7...Nb4? 8.Rb4 Bd7 9.Be2+-)) 7.ab5+/– ab5 (7...Nb4? 8.c3 c6 9.cb4 cb5 10.Na3+-) 8.Ra8 Qa8 9.c3 (9.Bb5 Ba6 10.Ba4 Bb7+/–) 9...Bd6 (9...Qa2 10.Qc2 Qa6 11.Na3+/–) 10.Na3+/– Nf6 11.Nb5 Qd8 12.Nd6 Qd6 13.b5 Ne5 14.Qa4 (better is 14.Ne5 Qe5 15.d4+/–) 14...0-0? (better is 14...Nf3!? 15.gf3 e5+/–) 15.Ba3+- Ra8?! (15...Nf3 16.gf3 Qd8 17.Bf8 Qf8+-) 16.Qa8! (16.Bd6?! A) 16...Ra4?? 17.Be5 (17.Ne5?! cd6 18.Nc6 Bc6 19.bc6 Ra1 20.Ke2 Ra6=) 17...c6 18.bc6 Bc6 19.Nd4 Ra1 20.Ke2+-; B) 16...Nf3 17.gf3 Ra4 18.Bc7 Ra1 19.Ke2 Rb1+/–) 16...Ba8 17.Bd6 cd6 (17...Nf3 18.gf3 cd6 19.Bd3+-) 18.Ne5 (better is 18.Be2+-) 18...Ne4 (18...de5 19.Be2 d4+-) 19.Nd7 (19.Nc6 Kf8+-) 19...f5 (19...Bb7 20.b6+-) 20.Bd3 Nc5 (20...Kf7 21.Ke2 Ke7 22.Ra1 Kd7 23.Ra8+-) 21.Nc5 dc5 22.0-0 Bb7 23.Ra1 c4 24.Bc2 h6 (24...d4 25.ed4 Bd5 26.b6+-) 25.Ra7 (25.Ra7 d4 26.Rb7+-) 1–0. gbmc – zqbi, internet, 2009.

5.a3 Bd7 6.c4 dc4 7.Bc4 b5 8.Bd3 Nf6 9.Nc3 Be7 10.0-0 0-0 11.Qc2 g6 (11...Kh8 12.Ne4 Nd5 13.Nc5+-) 12.Ne4 Ne4?? (better 12...Nd5+-) 13.Be4+- f5 (13...Qe8 14.Rfc1+-) 14.Bc6 Bc6 15.Qc6 Bd6 (15...Qd6 16.Qc3 Bf6 17.d4+-) 16.Qc3 e5 (16...Qe7 17.Qh8 Kf7 18.Qh7 Ke8 19.Qg6 Kd7 20.Rfc1+-) 17.Ne5 Qf6 18.Qb3 Kg7 (18...Rf7 19.Nf7 Qf7+-) 19.Nd7 1–0. Janek – Mrx, internet, 2018.

5.a3 Bd7 6.c4 Nf6 7.c5 Be7 8.Be2 0-0 9.0-0 h6 10.d3 Na7 11.h3 b6 12.d4 Nb5 (better is 12...a5!?=) 13.a4+/– Na7 14.Ba6 Nc6 15.Bb7 Rb8 16.Bc6 Bc6 17.b5 Bb7 18.c6 Ba8 (18...Bc8!?+/–) 19.Ba3+- Ba3 20.Na3 Qe7 21.Qb3 Ne4 22.Nc2 Rfd8 23.a5 (23.Qd3 Nd6+-) 23...Rdc8? (better is 23...ba5 24.Qd3 Nd6+-) 24.a6 Rd8 25.Qd3 f6 26.Nd2 Nd2 27.Qd2 e5 28.Rfe1 e4 29.Rf1 f5 30.f3 Rf8 31.Rf2 Qg5 (31...Rbe8 32.Qb4 Qe6 33.Qb3+-) 32.fe4 fe4 33.Raf1 Rbd8 34.Rf8 Rf8 35.Rf8 Kf8 36.Qf2 Kg8 (36...Ke7 37.Nb4 Ke6 38.a7+-) 37.Qf4 (37.Nb4!? Qh5+-) 37...Qf4 38.ef4 Kf7 39.Ne3 Ke6 40.g4 g6 (40...Ke7 41.Nd5 Kd6 42.Nc3+-) 41.Kg2 Kd6 42.f5 g5 43.Kg3 1–0. Hal1958 – Huib, playchess.de, 2005.

5.a3 Nf6 6.c4 Bd7 7.Qb3 Bd6 8.c5 Be7 9.Be2 a5 (9...Na7 10.0-0+=) 10.0-0+= ab4 11.ab4 Ra1 (11...b6 12.Ra8 Qa8 13.d4+=) 12.Ba1 b6 13.cb6 cb6 (13...Nb4 14.bc7 Qc7 15.Be5+=) 14.b5 Na5 15.Qc2 0-0 16.Bd4 Qb8 17.Nc3 Rc8 18.Ne5 (18.Ra1 Nc4+=) 18...Be8 19.f4 (19.Ra1 Ne4=) 19...Bb4 (19...Ne4 20.Ra1=) 20.Bd3 (20.Qa4 Bc5+=) 20...Bc3 (20...Bc5 21.Bc5 Rc5 22.Qb2=) 21.dc3 Nc4 22.Bc4 (22.Nc4 dc4 23.Be2 Qc7+=) 22...dc4 23.Qa4 (23.f5 Qd6+=) 23...Nd5= 24.e4 f6? (better is 24...Nc7 25.Qb4 A) worse is 25...Bb5 26.Rf3+/– (26.Nc4?! Bc4 27.Qc4 b5+=); B) 25...Nb5 26.Nc4 Qc7=) 25.ed5+- fe5 26.fe5 (better is 26.Be5!? Qa8 27.Qa8 Ra8 28.de6+-) 26...ed5+/– 27.e6 (better is 27.Qb4 Bg6 28.Qe7+/–) 27...Qd6? (better is 27...Bg6+/–) 28.Qa7+- Threatening mate: Qxg7 28...Rc7 (28...Qc7 29.Qc7 (29.Qb6?! Qb6 30.Bb6 Bb5+/–) 29...Rc7 30.Bb6+-) 29.Qb8 Do you see the mate threat? (29.Qb8 Qe7 30.h3+- (30.Qb6?! h6+-; 30.Bb6?! Rb7 31.Qd8 Qe6+/–)) 1–0. b4_player – opponent, gamecolony.com, 2007.

5.a3 Nf6 6.Bd3 Be7 7.0-0 0-0 8.c4 dc4 9.Bc4 Ne4 (9...Qd6 10.d4=) 10.Nc3 (10.d4 Qd6+=) 10...Nd6= 11.Bb3 Bf6 12.d4 Nf5 (12...Re8 13.Rc1+=) 13.Ne4 Be7 14.d5 ed5 15.Qd5 (15.Bd5 Na7+=) 15...h6 (15...Be6 16.Qd8 Rad8 17.Be6 fe6 18.Rac1=) 16.Rfd1 Nd6 (16...Be6!? 17.Qd8 Rad8 18.Be6 fe6+=) 17.Nd6 (17.Nd4 Nb8+/–) 17...Bd6 18.e4 (18.Qd3 Kh8+/–) 18...Be6+= 19.Qd3 Bb3 20.Qb3 Qe7? (better is 20...Qc8+=) 21.Rd5?? (better is 21.e5 Ne5 22.Ne5 Be5 23.Re1 Bb2 24.Re7 Ba1 25.Rc7+/–) 21...Qe4+= Black gets strong play along the open e–file 22.Re1 Qg6 23.Nh4 Rfe8 The mate threat is Rxe1 24.Re8 (24.Rde5 Re5 (24...Be5?! 25.Ng6 Bb2 26.Ne7 Ne7 27.Qb2=) 25.Be5 Qh5 26.Bd6 cd6-/+ (26...Qh4?! 27.Bc7 Rc8 28.Bb6+=)) 24...Re8 25.Rd1 Qg4 26.Nf3 Qe6 27.Qe6 Re6 28.Kf1 Kf8 29.Re1 Re1 30.Ke1 g6 31.h3 b5 32.Ke2 a5 33.Nd4? (better is 33.ba5 Na5 34.Nd4-/+) 33...Nd4-+ 34.Bd4 ab4 35.ab4 Bb4 36.Kd3 Ke7 37.Kc2 Kd6 38.Kb3 (38.Bg7 Bc5-+) 38...Bc5 39.Bg7 Bf2 40.Bh6 (40.Kb4 c6 41.Bh6 Be1 42.Kb3 c5-+) 40...c5 41.Bd2 Kd5 (41...Kd5 42.Bg5 b4-+) 0–1. MT – Quinten Bril, itsyourturn.com, 2000.

5.a3 Nf6 6.Bf6 Qf6 7.d4 e5 (7...Bd6 8.c4=) 8.Nc3 (8.b5 ab5 9.Bb5 e4=) 8...ed4 9.Nd5 Qd6 10.c4 de3 (10...dc3 11.Nc3 Bg4 12.Be2=) 11.Qe2 Be7 (11...Be6 12.Qe3 0-0-0 13.Rd1 Bd5 14.cd5+=) 12.Qe3 (12.Rd1 ef2 13.Kf2 0-0=) 12...Qe6?? (better 12...Be6+=) 13.Nc7+- (13.Nc7 Kf8 14.Ne6 Be6 15.Be2+-) 1–0. Janek – yxdjango, internet, 2017.

5.a3 =.

5.c4 Bb4?? 6.Bg7+- dc4 7.Bc4 Nf6 8.Bh8 +-.

5.c4 Bb4?? 6.Bg7+- Qe7 7.Bh8 Nc6 (7...dc4 8.Bc4 Nf6 9.0-0+-) 8.a3 Ba5 (8...Bd6 9.cd5 ed5 10.Qb3+-) 9.cd5 ed5 10.Qb3 0-0-0 11.Nc3 Kb8 (11...Be6 12.Rb1 b5 13.Qc2+-) 12.Ba6 Bc8 13.Rb1 Bb6 (13...Bc3 14.Bc3 b6 15.Bb5+-) 14.Nd5 Qc5 (14...Qe6 15.Bc4 Na5 16.Nc7+-) 15.Nb6 ba6 (15...Qb6 16.Qb6 cb6+-) 16.Nd7 Ka7 17.Nc5 1–0. pierre – waakvlam, ChessWorld.net, 2005.

5.c4 dc4 6.Bc4 Bb4?? 7.Bg7 Nc6 8.Bh8 +-.

5.c4 dc4 6.Bc4 Nf6 =.

5.g3 Bb4?? 6.Bg7 Nf6 7.Bh8 +-.

5.g3 Nf6 6.a3 c5 7.bc5 Bc5 8.Ne5 0-0 9.Nd7 Nbd7 (worse is 9...Qd7 10.Bf6 gf6 11.d4+=) 10.Bg2 Nb6 11.Nc3 Qd7 12.0-0 e5 (12...Nc4 13.Bc1-/+) 13.d4 ed4 14.ed4 Be7 15.Rb1 Nc4 16.Bc1 Na3 17.Ra1 Nb5 18.Nb5 Qb5 19.Be3 Rfe8 20.Rb1 Qd7 21.c4 Ne4 22.Be4 de4 23.c5 Qd5 (23...a5 24.Qb3 Ra7 25.f3 ef3 26.Rf3-/+) 24.Rb2 (24.Qb3!? Qd8 25.Qb7=) 24...Rab8 25.Qb3 Qb3 26.Rb3 Bd8 (better is 26...Bf6!?=) 27.Bf4+/– Rc8 28.Rb7 h6 29.Ra1 a5 (29...Bf6 30.Ra4+=) 30.Bd6 e3 31.fe3 Re3 32.Bf4 (better is 32.Rd1!?+/–) 32...Re4= 33.Rd7 Bf6 34.Ra5 Bd4 35.Kg2 Bc5 36.Rd5 Bb4 37.Rab5 Rec4 (37...g5!? 38.Rb8 Rb8 39.Bb8 Re2 40.Kh3 Kg7-/+) 38.Rd7+= Rc2 39.Kh3 Ba3 40.Rbb7 Rf8 41.Bd6 (41.Ra7 Bb4=) 41...Bd6+= 42.Rd6 Kh7 43.Rdd7 Rf2 44.Rbc7 g6 45.Re7 h5 46.Rcd7 (46.g4 hg4 47.Kg3 Rf1-/+) 46...Kh6 47.Rc7 (47.Re4 Rc8 48.Rf4 Re2 49.Rdf7 Rcc2-+) 47...g5-+ 48.Rc6 f6 49.Rcc7?? (49.g4 Rd8 50.Rc3-+) 49...g4 50.Kh4 Rh2 0–1. michas2007 – wmaes, gameknot.com, 2012. (=1.e3 d5 2.b4 a6 3.Bb2 e6)

4.c4?? dc4 5.Bc4 Nc6 6.Nf3 Nf6 7.Ne5 Ne5 8.Be5 0-0 9.0-0 Bd7 10.d4 Bc6 11.Bd3 Ne4 12.Qc2 f5 13.f3 Ng5 14.e4 f4 15.a3 Be7 16.Nc3 Qe8 17.d5 Bd7 18.d6 cd6 19.Bd4 Qh5 20.e5 Rac8 21.ed6 Bd6 22.Qd2 e5 23.Bf2 Rfe8 24.Ne4 Ne4 25.Be4 Re6 26.Bd5 Rce8 27.Be6 Re6 28.Qd5 Kh8 29.Rfd1 Rh6 30.h3 Bh3 31.Qb7 g6 32.Qa8 Kg7 33.Qb7 Kf6 34.Rd6 Kf5 35.Qc8 (time, 1–0). Nautiluschess – JollyJumper, ICS blitz, 2000.

4.Nf3 Nf6-/+ 5.c4 (5.a3 Bd6-/+) 5...0-0 6.Nc3 Ne4 (6...Nc6 7.cd5 ed5 8.Bb5-/+) 7.cd5 (better 7.Qc2 Bc3 8.Bc3-/+) 7...c6?? (better 7...ed5 8.Qb3 Bc3 9.dc3 c6-/+) 8.Ne4+- cd5 (8...ed5 9.Ng3+-) 9.Nc3 Nc6 10.d4 e5 (better 10...Bd6+-) 11.Ne5 Ne5 12.de5 Qa5 (12...Be6 13.Qd4 Ba5 14.Rc1+-) 13.Qd2 Bf5 (13...Be6 14.a3 Bc5 15.Rd1+-) 14.a3 Be7 (14...Bc5 15.Rd1+- (15.Nd5?! Qd2 16.Kd2 Rfd8+-)) 15.Bd3 (15.Qd5 Bc5+-) 15...Bd3 16.Qd3 Rad8 (16...Rfd8 17.0-0+-) 17.Qd4 (17.0-0!? f6 18.Rad1 fe5 19.Nd5 Bd6+-) 17...Bc5 18.Qd2 d4 19.Ne4 Qd2 20.Kd2 de3 21.Ke2 ef2 (21...b6 22.f4 Rfe8+-) 22.Nc5 f6 (22...Rd5 23.Rac1+-) 23.Ne6 f1Q (23...Rc8 24.Nf8 Rc2 25.Ke3 Rb2 26.Nd7 fe5 27.Rhb1+-) 24.Rhf1 Rd2 1–0. GuestWDWC – GuestMFMC, freechess.org, 2018.

4.Bg7+- b6 5.Bb5 (5.Bh8 Nf6+-) 5...Nd7 (5...Bd7 6.Bd7 Nd7 7.Nf3+-) 6.Nf3 (6.Bh8 Ne7+-) 6...Bb7 (6...a6 7.Be2+- (7.Bh8?! ab5 8.Nd4 Qg5+-)) 7.c3 (7.Ne5 c6 8.Bc6 Bc6 9.Nc6 Qg5 10.Bh8 Qg2+-) 7...Bd6 8.Bh8 Qe7 9.Bd7 Qd7 10.Be5 0-0-0 11.Bd6 Qd6 12.d4 f6 13.0-0 Ne7 14.a4 Rg8 15.Nbd2 Kb8 16.c4 Bc8 17.c5 Qc6 18.Qb3 e5 19.de5 Bh3 20.Nh4 d4 21.e4 Be6 22.Qb5 Qb5 23.ab5 Ng6 24.Ng6 Rg6 25.ef6 Bh3 26.g3 Bf1 27.Kf1 Rf6 28.f4 bc5 29.Ra6 Rf8 30.Rc6 (30...Kc8 31.Ke2+-) 1–0. Trkn – Mike, itsyourturn.com, 2000.

4.Bg7+- Bd2 5.Nd2 +-.

4.Bg7+- d4 5.ed4 Qd5 (5...Nf6 6.Bh8 Qd4 7.c3 Qe5 8.Be2+-) 6.c4 (better is 6.Bh8!? Qd8+-) 6...Qe4 7.Ne2 Bd2 (7...Ne7 8.f3 Qh4 9.g3 Qh5+-) 8.Qd2 Ne7 9.Nbc3 Qc6 10.Bh8 Qc4 11.Nf4 Qb4 12.Rb1 Qd6 (12...Qa5 13.d5+-) 13.Be5 (better is 13.Ne4!? Qa3 14.Rb3 Qb3 15.Nf6 Kd8 16.ab3 Bd7+-) 13...Qd7 (13...Qd8 14.Nh5 Ng8 15.Ne4+-) 14.Bb5 (14.Nh5 Kd8 15.Bb5 c6+-) 14...c6 15.Ba4 (better is 15.Nh5 cb5 16.Nf6 Kd8+-) 15...b6 (15...Nf5 16.Ne4 Qe7 17.Nf6 Qf6 18.Bf6+-) 16.0-0 Ba6 17.Rfd1 Nf5 (17...Qd8 18.Ne4 Nf5 19.d5+-) 18.d5! ed5 (18...Qd5 19.Nfd5) 19.Nfd5! Nh4 (19...Qd5 20.Qd5) 20.Nf6 Ke7 21.Nd7 Bc4 22.Qd6 Kd8 23.Nb6 Nd7 24.Qd7 1–0. maaxa – mary3, Live Game Caissa's Web, 2004.

4.Bg7+- Qd6 5.Bh8 e5 (5...Nd7 6.a3 Ba5 7.Qg4+-) 6.c3 Bc5 7.d4 (7.Be5 Qe5 8.d4 Qe7 9.dc5 Nf6+-) 7...ed4 8.ed4 Bb6 (8...Qe6 9.Be2 Bd6 10.Nf3+-) 9.Qh5 (9.Bd3 Ne7+-) 9...Be6 (9...Qh6 10.Qh6 (10.Qd5?! Qc1 11.Ke2 Qb2 12.Kf3 c6+-) 10...Nh6 11.Nf3+-) 10.Be5 (10.Qh7 f6+-) 10...Qc6 (10...Qe7 11.Qh7 f6 12.Qe7 Ke7 13.Bf4+-) 11.Qh7 (11.a4 a6 12.a5 Ba7 13.Qh7 f6 14.Bc7 Bd4+-) 11...Ne7 (11...f6 12.Bf4 Ba5 13.Qg6 Kd8 14.Qc2+-) 12.Qh8 (12.a4 a6 13.Nf3 Ng6+-) 12...Kd7 13.a4 a5 (13...a6+-) 14.Bb5 1–0. GuestQMQJ – GuestQPKW, freechess.org, 2018.

4.Bg7+- e5 5.Bh8 (5.Qh5 Nd7 6.Bh8 Ngf6 7.Bf6 Qf6 8.Qh7 e4+-) 5...e4 (5...Nf6 6.Nf3 e4 7.Nd4+-) 6.Bc3 Nc6 (6...Be7 7.Qh5 h6 8.d3+-) 7.Bb5 (7.Bb4 Nb4 8.Nc3 Nf6+-) 7...Bc3 8.Nc3 a6 9.Bc6 bc6 10.d3 Qf6 11.Nge2 Bg4 12.Qd2 h5 13.h3 Be2 14.Ke2 Nh6 15.Rab1 0-0-0 16.Na4 ed3 17.cd3 d4 18.Nc5 de3 19.fe3 Qg5 20.Ne4 Qg2+- 21.Nf2 Ng4 22.hg4 hg4 23.Rhg1 Qf3 24.Kf1 g3 25.Qe2 Qf2 26.Qf2 gf2 27.Kf2 Rd3 28.Ke2 Ra3 29.Rb2 c5 30.Rg7 c4 31.Rf7 c3 32.Rc2 Kb7 33.Rf4 Kb6 34.Rc4 c5 35.R4c3 Ra5 36.Kf3 Kb5 37.Rc5 (37...Kb6 38.Ra5 Ka5 39.e4 Kb5 40.e5 Ka5 41.e6 Kb6 42.e7 Kb7 43.e8Q Ka7 44.Rb2 a5 45.Qd7 Ka6 46.Qb7) 1–0. McCarthy,Michael – Hodds,Martin, WCCF, 2001.

4.Bg7+- Ke7 5.Bh8 Nh6 6.Bg7 (6.Bc3 Bd6+-) 6...Nf5 7.Qg4 e5 (7...Bd6 8.Bd3 Ng7 9.Qg7 Nd7 10.Qh7 Nf6+-) 8.Qb4 Kd7 (8...Ke6 9.Bf8+-) 9.Be5 Nc6 (9...f6 10.Qg4 fe5 11.Qf5 Kd6 12.Qh7+-) 10.Bb5 (10.Qf4 Qe7 11.Qf5 Ke8 12.Qh7 Ne5 13.Qg8 Kd7+-) 10...a5 (10...Qg5 11.Qf8 Qg2 12.Qf7 Nfe7 13.Qf3 Qf3 14.Nf3+-) 11.Bc6 (11.Qf4 Ke8+-) 11...bc6 (11...Kc6 12.Qc3 Kd7 13.Nf3+-) 12.Qf4 (better 12.Qg4 Ke6 13.Nf3 Qd7+-) 12...Qh4 (12...Nd6 13.Bd6 cd6 14.Qf7 Qe7 15.Qe7 Ke7 16.Nc3+-) 13.Qf5 Kd8 14.Bf6 Ke8 15.Bh4 (better 15.Qe5 Be6 16.Bh4+-) 15...Bf5 16.Nc3 (16.d3 Rb8+-) 16...Bc2 17.Nf3 Bd3 18.Ne5 Ba6 19.Nc6 Rd8 1–0. GuestGPND – GuestGHZR, freechess.org, 2019.

4.Bg7+- Qf6 5.Bf6 Nf6 6.Be2 Ne4 (6...Rg8 7.g3+-) 7.Nf3 Nc6 8.0-0 h5 9.d3 Nf6 10.c3 (10.d4 Bd6+-) 10...Bd6 11.Nbd2 Bd7 (11...Rg8 12.Rb1+-) 12.e4 (12.Rb1 Na5+-) 12...de4 13.de4 0-0-0 14.Rb1 Ne5 (14...Rhg8 15.Qb3 Na5 16.Qb2+-) 15.Qb3 Bc6 (15...b6 16.Ne5 Be5 17.Nf3+-) 16.Nd4 Be4 (16...Ne4 17.Nc6 Nd2 18.Qb7 Kd7 19.Ne5 Be5 20.Qb5 Kd6+-) 17.Ne4 Ne4 18.Qb7 Kd7 19.Bb5 Ke7 20.Qe4 h4 21.f4 Ng6 22.Nc6 Kf8 23.Nd8 1–0. DEFFM – GuestVGKS, freechess.org, 2018.

5.c3 Ba5 6.Bh8 Nc6 (6...Nd7 7.Qc2+-) 7.Qh5 (7.Bb5 Bd7+-) 7...Qe7 (7...h6 8.Bb5+-) 8.Qh7 Qf8 (8...Nf6 9.Qg7 Bd8+-) 9.Bg7 (9...Nf6 10.Bf6+-) 1–0. pierre (2195) – joelynnturner, internet, 2007.

5.Bh8 c4 6.Nf3 +-.

5.Bh8 Nc6 6.Nf3 (6.c3 Ba5+-) 6...Nge7 (6...c4 7.c3 Bd6 8.d3+-) 7.Bf6 (better is 7.a3 Ba5+-) 7...Qa5 (7...c4 8.c3 Bd6 9.d3+-) 8.c3 (better is 8.a3!? e5 9.c3 Bg4+-) 8...Ba3 9.Na3 (9.Qb3 Ng8+-) 9...Qa3 10.Bb5 (10.Qc2 Ng8 11.Bg7 h6+-) 10...Bd7 11.Be7 Ne7 12.Bd7 Kd7 13.0-0 Qa5 14.Ne5 Ke8 15.Qh5 Ng6 16.Ng6 fg6 17.Qh7 Rd8 18.Qg6 Kd7 19.Rab1 b5 20.Qf7 Kd6 21.Qf4 Kd7 22.Qf7 Kd6 23.a4! Rd7 24.Qf8 Kc6 25.Rb5 Qa4 26.Qc5 1–0. gtate (1965) – ivos (1965), net–chess.com, 2006.

5.Bh8 Bd6 6.Nc3+-.

5.Bh8 e5 6.Qh5 (6.Bb5 Nf6+-) 6...Nf6 7.Bf6 (7.Qg5 Nd7 8.Qh6 Nf8+-) 7...Qf6 8.a3 (8.c3 Bf8+-) 8...Bd6 9.Qh7 Be6 10.Qg8 Bf8 11.Bb5 Bd7 12.Nc3 e4 13.Rb1 Qe6 14.Bc6 Bc6 15.Nge2 0-0-0 16.Nd4 Qd7 17.Nc6 bc6 18.a4 Bc5 19.Qg5 Bb6 20.0-0 f5 21.f3 Qe6 22.fe4 de4 23.Rf5 Rd2 24.Rf8 Kb7 25.a5 Qc4 26.ab6 Qc3 27.ba7 Ka7 28.Ra8! Ka8 29.Qg8 Ka7 30.Qa2 (30...Qa5 31.Qa5) 1–0. Rosner,Dirk – Sparfeld, Tiger SC, 1999.

5.Bh8 Nf6 6.a3 Bc5 7.d4 Bd6 (7...Kd7 8.Bf6 Qf6 9.c4+-) 8.Nc3 (better is 8.Qf3 Be7 9.Nc3+-) 8...Qd7 (8...Kd7 9.Bf6 Qf6+-) 9.Bf6 b6 10.Qh5 Nd4 11.ed4 Bb7 12.Qh7 Bf8 13.Qg8 Qc6 14.Bb5 (14...a6 15.Bc6 Bc6 16.Nf3+-) 1–0. marekt – bud_wise_er, GameColony.com, 2002.

5.Bh8 Nf6 6.a3 Bd6 7.Nc3 +-.

5.Bh8 Nf6 6.c3 Bf8 7.Qf3 +-.

5.Bh8 Nf6 6.Nf3 +-.

5.Bh8 Qg5 6.Nf3 Qg6 7.a3 Bd6 8.Bb2 e5 9.d4 e4 10.Ne5 Qg5 (10...Be5 11.de5 Bg4 12.f3 (12.Qd5?! Rd8 13.Nc3 Rd5 14.Nd5 Kd8+-) 12...ef3 13.gf3+-) 11.Nc6 bc6 12.Nd2 a5 (12...Rb8 13.h4 Qg6 14.Rb1+-) 13.Nb3 (13.c4!? Qh6+-) 13...Ba6 14.Ba6 Qg2 (14...Ra6 15.0-0+-) 15.Rf1 (better 15.Kd2 Qf2 16.Qe2 Qe2 17.Be2 a4+-) 15...Ra6 16.Qh5 Nf6 17.Qf5 Be7 (17...Ke7+-) 18.Qc8 Bd8 19.Qa6 Ng4 (19...Qh2 20.Qc6 Kf8 21.Na5+-) 20.Qc6 Kf8 21.0-0-0 Qf3 22.Nc5 (better 22.Qd5 Bh4+-) 22...Nh2 23.Nd7 Kg7 24.Rg1 Ng4 25.Qd5 (better 25.Ne5 Qf5 26.Rg4 Bg5+-) 25...f5 26.Qe5 (26.Ne5 c5 27.Qf7 Kh6 28.Rh1 Nh2 29.Rh2 Qh3 30.Rh3 Bh4 31.Rh4 Kg5 32.Qe7) 26...Kh6 27.Rh1 Kg6 (27...Qh1 28.Rh1 Bh4 29.Rh4 Kg6 30.Qe8 Kg7 31.d5 Ne5 32.Be5) 28.Qe6 (28.Qe8 Kg7 29.Qf8 Kg6 30.Qg8) 28...Kg5 (28...Nf6 29.Ne5 Kg5 30.Nf3 Kg4 31.Ne5 Kg5 32.Rdg1 Ng4 33.Qh6) 29.Qg8 1–0. GuestNKJR – GuestLQFT, freechess.org, 2017.

5.Bh8 Nh6 6.Bb2 e5 7.Qh5 Nf5 (7...Bf8 A) 8.Be5?! Bg4 9.Bc7 Qf6 (9...Bh5?? 10.Bd8 Rd8 11.d4+-) 10.Qd5 Qa1+-; B) 8.Bb5 Bg7 9.Nf3+-) 8.Qh7 Qe7 (8...Qf6 9.Qg8 Kd7 10.Nc3+-) 9.Bb5 Bd7 (9...Bd6 10.Qh8 Kd7 11.Nf3+-) 10.Bc6 Bc6 (10...bc6 11.Qh8 Qf8 12.Qf8 Bf8 13.Be5+-) 11.Qf5 Bd7 (11...Bd6 12.Nf3 Bd7 13.Qh5+-) 12.Qh5 (12.Qe5!? Bd6 13.Qh8 Qf8 14.Qf8 Kf8+-) 12...0-0-0 (12...Bd6 13.Qh8 Qf8 14.Be5 Qh8 15.Bh8+-) 13.Nf3 (better 13.Qe5 Be6+-) 13...f6 14.Qh4 (14.g4 Rg8 15.g5 Be8+-) 14...Re8 (14...Qg7 15.Qg3 Qh7 16.Kd1+-) 15.0-0 (15.Nc3 Bc3 16.Bc3 Qg7+-) 15...e4 (15...Rg8 16.Nc3 Be6 17.Rab1+-) 16.Ne1 (16.Bf6 Qe6 17.Nd4 Qf7+-) 16...Qe6 (16...f5 17.Qe7 Be7 18.Nc3+-) 17.Bf6 (17.Qf6 Qg8+-) 17...Rf8 18.Bd4 Be7 19.Qh7 Bd6 20.d3 Kb8 (20...c5 21.Bg7 Qe7 22.Bf8 Qh7 23.Bd6+-) 21.Nd2 Qg4 (21...ed3 22.cd3 Ka8 23.Nef3+-) 22.f3 (better 22.de4 Bb5 23.f3 Qg5+-) 22...Qf5 (22...ef3 23.Nef3 Rg8 24.Rf2+-) 23.Qf5 Rf5 24.de4 Rh5 25.e5! Be5 26.Be5 (26.Be5 Re5 27.e4+-) 1–0. Trigance,Emile – Martinez,Carlos (1800), FICGS, 2013.

6.Nf3 Kf7 7.Nd4 Bd7 (7...Nh6 8.Qh5 Kg8 9.Nc6 bc6 10.Qh4+-) 8.Qh5 Kf8 9.Qh7 (9.Nc6 Bc6 10.Qh7 Qe7+-) 9...Qe7 10.Qe7 (10.Qh5!? Nd4 11.ed4 Bd6+-) 10...Ke7 11.Nc6 Bc6 12.Bd3 d4 13.0-0 Nh6 14.Bf6! Kf6 15.ed4 Rg8 16.Nc3 Rg2+/– 17.Kh1 Ng4 18.f3 Nh2?? 19.Kg2+- Nf1 20.Rf1 1–0. gtate (1910) – tibo (1805), net–chess.com, 2004.

6.Qh5 Ke7 7.Qh7 (7.Qh7 Kd6 8.c3+-) 1–0. DEFFM – GuestDCYL, freechess.org, 2018.

7.Qh7 Nce7 8.c3 Bd6 9.Qf7 (9.h4!? c5+-) 9...c5 10.Bf6 Kc6 (10...Nf6 11.Qf6 Qb6 12.c4+-) 11.Be7 Ne7 12.a4 Bd7 13.Bb5 Kc7 14.Bd7 Kd7 15.Nf3 Qh8 16.0-0 (better is 16.Ng5 Qh6 17.h4+-) 16...Rf8+/– 17.Qf8 Qf8 18.d4 c4 19.Nbd2 Nf5 (19...Qf5 20.Rfb1 Kc7 21.h4+-) 20.Rab1 Qh6? (20...b6+-) 21.Rb7 Kc8 22.Rfb1 Ne3 23.Ne5 (better is 23.Ra7 Ng4 24.h3+-) 23...Be5 24.de5 (24.fe3 Qe3 25.Kh1 Qd2 26.de5 Qc3 27.Ra7 Qe3= (27...Qe5 28.Rf1 Kb8 29.Rh7+-)) 24...Nf5? (better is 24...Qg5 25.fe3 Qe3 26.Kh1 Qd2 27.Ra7 Qd3+-) 25.Ra7 (better is 25.Nf3 Qf4 26.a5+-) 25...Qd2= 26.Rh7?? (better is 26.g4!?=) 26...Qd3 (26...Qc3 27.Rh8 Kd7 28.Rhb8-+) 27.Rf1? (27.Rc1 Ne3! 28.Rh8 Kd7 29.h4-+) 27...Qc3-+ 28.Rh3 Nd4?? (better is 28...Qe5 29.a5 Kb7-+) 29.g4 (better is 29.Rc3 Ne2 30.Kh1 Nc3 31.h4+-) 29...Ne2 30.Kg2 Nf4 31.Kh1 Qh3 32.Rg1 1–0. bashful – mount, Live Game Caissa's Web, 2004.

7.Qh7 Nce7 8.Qh4 Nc6 9.Nf3 +-.

7.Qh7 Nce7 8.Qh4 Bd6 9.Bf6 Nf6 10.Qf6 +-.

7.Qh7 Nce7 8.Qh4 Qf8 1–0. market (1960) – ABCDEFtoZ (1680), GameColony.com, 2002.

7.Qh7 Nge7 8.Bf6 Qf8 9.Qg7 Qe8 (9...Qg7 10.Bg7 Nf5 11.Bf6+-) 10.Bb5 (10.Nf3 Bd6+-) 10...a6 11.Bc6 bc6 (11...Kc6 12.Nf3+-) 12.Nf3 Rb8 13.Ne5 Kd8 14.h4 (14...Bd6 15.h5+-) 1–0. Sundin,Thommy (2015) – Johansson,Hanz, Uppsala, 1989.

5.Bh8 b6 6.Bd3 (6.Qh5 Nf6 7.Bf6 Bf6+-) 6...h6 7.Qg4 Nf6 8.Bf6 (better is 8.Qg7!? Ba6 9.Ba6 Na6+-) 8...Bf6 9.Qg8 (9.Nc3 c5+-) 9...Ke7 10.Qd8 Kd8 11.c3 Nc6 12.f4 Nb4 13.Ke2 Nd3 14.Kd3 Ba6 15.Kc2 Bf1 16.Nf3 Bb5 17.a4 Ba6 18.g4 Be2 19.Ne5 Be5 20.fe5 Bg4 21.Rg1 Bf5 22.d3 Bg6 23.Nd2 Ke7 24.Raf1 Rg8 25.Nf3 Rc8 26.Nh4 (26...Bh5 27.Rg7+-) 1–0. Sommer,Roman – Mueller,Andreas, Hassloch op–B, 1999.

5.Bh8 f6 6.Nf3 Kf7 7.c4 (better 7.Bd3+-) 7...Nh6 8.Bf6! Bf6 (8...Bf6 9.Nc3 Combination; 8...Kf6 9.Qc2 Combination) 9.Nc3 d4 (9...Kg7 10.Qb3+-) 10.Nd4 Bd4 11.ed4 Qd4 (11...Nc6+-) 12.Qh5 Kg7 13.Qg5 Kh8 14.Qh6 e5 (14...Qg7 15.Qg7 Kg7+-) 15.Qf8 1–0. Marcus – cgo69, internet, 2018.

5.Bh8 Nf6 6.Nc3 +-.

5.Bh8 Nf6 6.Nf3 +-.

6.Bf6 Nf6 7.Nf3 Qe7 (7...Ne4 8.d4+-) 8.Be2 (8.d4 c5+-) 8...Nc6 (8...e5 9.Nc3+-) 9.c4 (9.d4 e5+-) 9...Bd7 10.cd5 Nd5 11.Bb5 0-0-0 12.Bc6 Bc6 13.Qb3 a6 14.Ne5 Bb5 15.Nc3 Qg5 16.Nb5 ab5 17.Nf3 Qg2 18.Rg1 Qf3+/– 19.Qb5 Qe4 20.a4 Kb8 21.a5 Nb4 22.a6?? Nc2-+ 23.Kf1 Na1 24.ab7 Qc2 25.Qa6?? Qd1 26.Kg2 Rg8 27.Kh3 (27...Qh5; 27.Kh1 Qg1). grower – Dragonpoo, Live Game Caissa's Web, 2005.

7.Nc3 a6 8.Qf3 (8.Nf3 Ne7+-) 8...Qg6 (8...c5 9.a4+-) 9.Bd3 (9.Nge2 Nf6+-) 9...Qg7 (9...f5 10.Be2+-) 10.Qg3 Qg3 11.hg3 h6 12.Bh7 Nf6 13.Rh6 Nh7 14.Rh7 Nc6 15.a3 Ke7 16.Nf3 Bd7 17.Ng5 Be8 18.0-0-0 b5 19.Na2 a5 20.c3 Rb8 21.Kc2 Ne5 22.d3 b4 23.ab4 ab4 24.Nb4 c5 25.Na2 Ba4 1–0. Wilting – Pavolic, corr, 1969.

7.Nc3 b5 8.Bb5 c6 9.Bd3 (9.Be2 Qg7 10.Nf3 Nf6+-) 9...Qe5 (9...e5 10.Qh5+-) 10.Qg4 Ne7 (10...Nf6 11.Qg7 Nbd7 12.Nf3+-) 11.Bh7 (11.Nf3 Qf6 12.Qh5 Nd7+-) 11...c5 (11...Qh8 12.Qh5 Nd7 13.Nf3+-) 12.Nf3 Qf6 13.Rb1 Nbc6 14.Nb5 (better 14.Qh5 Ng6+-) 14...Ne5 (14...e5 15.Qh5 Rb8 16.c4+-) 15.Nc7 (better 15.Qg3 Nf3 16.gf3 Qh6+-) 15...Kd7 16.Ne5 (16.Na8 Ng4 17.Bd3 Kc6=) 16...Kc7 17.Qg3 Ba6 (17...Kd8+-) 18.Ng4 e5 19.Nf6 Kc6 20.Qe5 Rb8 (20...Bc8 21.Qe7 Be6 22.Ne4 de4 23.Be4 Bd5 24.Rb7 Be4 25.Qd7) 21.Rb8 Bb7 (21...Nc8 22.c4 Nb6 23.Qe8 Kc7 24.Qd8 Kc6 25.Rb6 ab6 26.Qd7) 22.Qe7 Kb5 (22...a6 23.Rb7 d4 24.Be4) 23.Qb7 Ka4 (23...Ka5 24.Qa7) 24.Qa7 1–0. GuestMZWZ – fackmate, freechess.org, 2020.

7.Nc3 Nc6 8.Bb5 Bd7 9.Qh5 0-0-0 (9...Qg7 10.Nf3+-) 10.Nf3 h6 11.0-0 Qg7 12.Bc6 Bc6 13.Ne5 (13.Qe5 Nf6+-) 13...Bd7 (13...Be8 14.Nd3+-) 14.Nd7 (14.Rab1 Be8 15.Nd3 Ne7+-) 14...Rd7 15.Rab1 Nf6 (15...Ne7 16.Qh4+-) 16.Qe5 Kb8 (16...b6 17.f4+-) 17.Na4 (better 17.f4 b6 18.Rf3+-) 17...Rd8 (17...b6+-) 18.Nc5 Rg8 19.Rb7 Ka8 20.Ra7! Ka7 (20...Ka7 21.Qc7 Mate attack) 21.Qc7 Ka8 22.Qb7 1–0. GuestMZWZ – GuestMXPM, freechess.org, 2020.

7.Nc3 Ne7 +-.

7.Nc3 Nh6 8.Nf3 Ng4 9.Bd3 (9.d4 c5+-) 9...e5 (9...Qg7 10.Rg1+-) 10.Nd5 (better 10.h3 Nh6 11.Nd5+-) 10...Qg7 (10...Qd6 11.Nc3 f5+-) 11.Nc7 Kf8 12.Na8 Nd7 13.Bf5 f6 14.Nc7 Ke7 15.Ne6 (15.Qb1!? a5+-) 15...Qg8 16.Qb1 e4 17.Qb4 Ke8 18.Nc7 Kd8 19.Nd4 Nde5 20.Qd6 Bd7 (20...Nd7 21.Bd7 Bd7 22.Nde6 Kc8 23.Ne8 Be6 24.Qc7) 21.Nde6 Kc8 22.Na6! Qd8 (22...ba6 23.Qc7) 23.Qb8 1–0. DEFFM – GuestVPFG, freechess.org, 2018.

7.d4 Nc6 8.Nd2 (8.Nf3 e5+-) 8...Bd7 (8...e5 9.de5 Ne5 10.Bb5 c6 11.Be2+-) 9.Bb5 0-0-0 10.c3 Nh6 11.Ngf3 Re8 12.Ne5 Ne5 13.de5 Qe5 14.Bd7 Kd7 15.Qa4 Kd8 16.Qa7 Qc3 17.Rd1 Qd3 18.Qb7 Nf5 19.Rc1 Ke7 20.Qc7 Kf8 21.Qc5 Kg8 22.Qc6 Rd8 23.Qc7 Re8 24.g4 Ne3 25.fe3 Qe3 26.Kd1 Qf3 27.Nf3 (27...Rf8 28.Re1+-) 1–0. wood – gambitgod, Live Game Caissa's Web, 2005.

7.d4 e5 8.Nf3 Nd7 9.Bb5 +-.

5.Bh8 c6 6.Qh5 Qb6 (6...Nd7 7.Qh7 Nf8 8.Qh5+-) 7.Nc3 1–0. Janek – Mrx, internet, 2019.

5.Bh8 Nbc6 6.Bc3 Bc5 (6...e5 7.Nf3 Bd6 8.Be2+-) 7.d4 Bb6 (7...Bd6 8.Qh5+-) 8.Qh5 Kd7 (8...e5 9.de5 Bf5 10.Bd3+-) 9.Qh7 Nf5 (9...Qf8 10.Nf3+-) 10.Qf7 Nce7 11.g4 Nh6 12.Qh7 Qf8 13.Be2 c6 14.Nf3 Kc7 15.Ne5 Bd7 16.Nd7 Kd7 17.g5 Nhf5 18.Nd2 Qe8 19.Bg4 a5 20.Bf5 ef5 21.Nf3 a4 22.Ne5 Kd6 23.Bb4 c5 24.dc5 Bc5 25.Nf7 Kc6 26.Bc5 Kc5 27.0-0-0 Qb5 28.Ne5 a3 29.Qe7 Kb6 30.Nd7 Ka7 31.Qa3 Qa6 32.Qc5 b6 33.Qc7 Qb7 34.Qb7 Kb7 35.Rd5 Ra2 36.Kb1 Ra6 37.Rhd1 (37...Ra4 38.Rf5+-) 1–0. revbodio – goldenbear1435, Live Game Caissa's Web, 2006.

5.Bh8 Nbc6 6.Bf6 Bd6 (6...e5 7.Nc3+-) 7.Nc3 Be5 (7...e5 8.Nd5! Qd7 9.Ne7 Be7 10.Be7 Qe7 11.Rb1+-) 8.Be5 Ne5 9.Qh5 N5g6 (9...Nf5 10.Qh7 Qf6 11.Nge2+-) 10.Nf3 d4 (10...Nc6 11.Qh7 Qf6 12.Rb1+-) 11.Nd4 c5 (11...e5 12.Nf3 Nd5 13.Qh7+-) 12.Qc5 Bd7 13.Bd3 Rc8 (13...e5 14.Ndb5 Bb5 15.Bb5 Kf8 16.h4+-) 14.Qh5 Nf5 (14...Bc6 15.Qh7 Bg2 16.Rg1+-) 15.Bf5 ef5 16.Rb1 f4 (16...b6 17.Qh7 Qf6 18.Qg8 Nf8 19.0-0+-) 17.Rb7 fe3 18.fe3 Qf6 19.Rf1 Qa6 20.Rf7! Qb7 (20...Kf7 21.Qf5 Double attack (21.Rd7 Deflection)) 21.Qh7 Qg2 (21...Nf8 22.Qg7 Kd8 23.Ncb5 Qb5 24.Nb5 Rc2 25.Qf8 Be8 26.Qd6 Bd7 27.Qd7) 22.Qg8 (22.Rd7?! Qg1 23.Ke2 Qg2 24.Ke1 Qg1 25.Ke2 Qg2 26.Ke1=) 22...Nf8 23.Qf8 1–0. Janek – Aclean, internet free game, 2017.

5.Bh8 Nbc6 6.Qh5 e5+-.

5.Bh8 Nec6 6.Qh5 d4 (6...Nd7 7.Qh7 e5 8.a3+-) 7.Qh7 (7.ed4 Nd4 8.Qh7 Bf8+-) 7...de3 8.Qg8 (8.fe3 a6+-) 8...Ke7 (8...Bf8 9.de3 Nd7 10.Nf3+-) 9.Qd8 Kd8 10.fe3 Na6 11.Nf3 Be7 12.Ba6 ba6 13.0-0 Nb4 14.Nd4 c5 15.a3 cd4 16.ab4 de3 17.de3 Bb4 18.Rf7 Ke8 19.Rh7 Kf8 20.Bf6 Rb8 21.Bd4 Rb5 22.Rh8 Ke7 23.Rc8 Rd5 24.Ra6 Kd7 25.Ra8 e5 26.R8a7 Kc8 27.c4 Rd8 28.Rf7 ed4 29.Ra8 1–0. mtra – metti, Internet, 2002.

5.Bh8 Bd7 6.Qh5 Ng6 7.Qh7 Nc6 8.a3 Bd6 9.Bg7 Nce7 (9...Qe7 10.Nf3 0-0-0 11.Nc3+-) 10.Bf6 c5 (10...Nf8 11.Qh5+-) 11.Nf3 Qb6 (11...Bc6 12.Nc3+-) 12.Ng5 (12.Nc3 0-0-0+-) 12...0-0-0 13.Nf7 d4 (13...Rf8 14.Nc3 Be8 15.Nd6 Qd6 16.Bg7+-) 14.Nd8 (better 14.Bd3!? Rf8 15.Nd6 Qd6+-) 14...Qd8 (14...Kd8 15.Nc3 dc3 16.Qg6+-) 15.ed4 cd4 (15...Qf8 16.Be7 Ne7 17.Nc3 cd4 18.Ne4+-) 16.Bd4 Qe8 (16...Kb8 17.Bf6 Qf8 18.Qg7+-) 17.Ba7 (17.Nc3 Bc6+-) 17...e5 18.Bd3 (18.Nc3 Nc6 19.Ne4 Be7+-) 18...Nf4 19.0-0 Bc6 20.Be4 Ne2 21.Kh1 Be4 22.Qe4 Nf4 23.Nc3 1–0. GuestRJVQ – GuestMBTB, freechess.org, 2020.

5.Bh8 Ng6 6.Bb2 b5 7.Bb5 c6 8.Ba4 Bd7 9.c3 (9.Nf3 Na6+-) 9...Bd6 10.Nf3 Na6 11.0-0 (11.Ba3 c5+-) 11...Ne5 (11...Rb8 12.Bb3+-) 12.d4 Ng4 13.h3 Nf6 14.Nbd2 Rb8 15.Qc2 Ne4 16.Ne4 h6 17.Nd6 Ke7 18.Ba3 f5 19.Nb7 Ke8 20.Nd8 Rd8 21.Ne5 h5 22.Qe2 f4 23.Qh5 1–0. gtate (1800) – rickitikitavi, net–chess.com, 2002.

5.Bh8 Ng6 6.Bb2 Qd6 7.Qh5 Nd7 (7...e5 8.Qh7 Nd7 9.Nf3+-) 8.Qh7 Ndf8 (8...e5 9.Nf3+-) 9.Qh5 (9.Qg7 e5+-) 9...e5 10.Nf3 (10.a3 Ba5+-) 10...Nd7 11.Qh7 Nf6 12.Qg7 Be6 (12...Ke7 13.a3 Ba5 14.Nc3+-) 13.Ne5 (better 13.Qf6 Qc6 14.Ne5 Qc2 15.Ng6 Qg6+-) 13...Ne5 14.Qf6 Nd7 15.Qh8 Nf8 16.Bf6 (16.a3 Bc5+-) 16...Kd7 (16...Bf5 17.c3 Bc5 18.Bb5 c6 19.Be2+-) 17.Bb2 (17.a3 Bc5+-) 17...Re8 18.Qg7 (18.a3 Bc5+-) 18...Ng6 (18...Kc8 19.h4+-) 19.Bb5 c6 20.Be2 (20.Bd3 Qb8+-) 20...Qc5 (20...Kc8 21.h4+-) 21.0-0 (21.a3 Ba5 22.Bd3 Ne7+-) 21...Qd6 (21...Qc2 22.Rc1 Qe4 23.d3+-) 22.c4! Ba5 (22...dc4 23.Rc1 Decoy) 23.cd5 (23.f4 Ne7 24.Be5 Nf5+-) 23...Bd5 24.Nc3 Be6 (24...Rh8 25.f4 Bc3 26.dc3+-) 25.Ne4 Qe7 (25...Qb4 26.Nf6 Ke7 27.Ne8 Ke8 28.Bc3+-) 26.Nf6 Kc7 (26...Kd8 27.Ne8 Ke8 28.Bf6+-) 27.Ne8 Qe8 28.d3 Bb6 (28...Kb8 29.Rfb1+-) 29.Rac1 (29.Rfc1 Kb8+-) 29...Kb8 30.d4 1–0. DEFFM – GuestVQVN, freechess.org, 2016.

5.Bh8 Ng6 6.Bb2 Nd7 7.Nc3+-.

5.Bh8 Ng6 6.Bg7+-.

5.Qh5 Kd7 6.Bh8 Qe7+-.

5.Qh5 Kd7 6.Bh8 Nf6 7.Qf7 Qe7 8.Qf6 Nc6 9.Nf3 b6 10.Bb5 Bb7 11.Ne5 Kd6 12.Bc6 Rf8 13.Qe7 Ke7 14.Bb7 Rh8 15.Nc6 Kd6 16.Nb4 Rg8 17.Na3 Rg2 18.Nb5 Ke7 19.Nc6 Kf6 1–0. van Rooijen,Peter – Moran,Paul, FCV, 2001.

5.Bh8 Kd7 (5...Nf6 6.Nf3+-) 6.Qh5 Ne7 (6...Qe7 7.Nf3+-) 7.Qh7 Nbc6 8.a3 Ba5 (8...Bd6 9.Nf3+-) 9.c4 dc4 10.Bc4 a6 11.Nf3 b5 12.Be6! Ke6 13.Ng5 Kd7 14.Qf7 (better 14.Bc3+-) 14...Qh8= 15.Qe6 Kd8 (better 15...Ke8 16.Qf7 Kd8=) 16.Nf7+- Ke8 17.Qc6 (17.Qe7 Ke7 18.Nh8 Kf6=) 17...Kf7= (17...Nc6? 18.Nh8 Ne7 19.h4+-) 18.Qa8 Qa1 19.0-0 b4 (19...c5 20.Rd1=) 20.ab4+= Bb4 21.Nc3 Qb2 22.Rb1?? (better 22.Nd5 Bd6 23.Ne7+=) 22...Qd2-+ 23.Na4 (23.Ne4 Qc2 24.Ng5 Kg6-+) 23...Qc2 (23...Qa2 24.Rd1-+) 24.Rf1 (24.Ra1 a5-+) 24...Qa4 25.Qf3 Qc2 26.Qh5 (26.Qh5 Ke6 27.Qh6 Kd7 28.Qh5-+). GuestRNYF – nadumf, freechess.org, 2017.

5.Nf3 Nc6 6.Bb5 (6.Bh8 Nh6 7.c3 Bd6+-) 6...Bd7 (6...Nh6 7.a3 Rg8 8.Bh6+- (8.ab4?! Rg7 9.Bc6 bc6+=)) 7.0-0 (7.Bh8 Nh6 8.Bc6 bc6+-) 7...h5 8.Bh8 e5 9.Bc6 Bc6 10.Ne5! fe5 11.Qh5 Ke7 12.Qe5 Kf7 13.f4 Qh4 14.Qc7 Ke6 15.Be5 d4 16.c3 dc3 17.Nc3 Qg4 18.f5 Qf5 19.Rf5 Kf5 20.Rf1 Kg6 21.Qg7 Kh5 22.Rf5 Kh4 23.Bg3 (23.Qg5) 1–0. Trkn – Cain, itsyourturn.com, 2000.

5.Nf3 Nc6 6.Bb5 Nh6 7.a3 Rg8 8.ab4?! Rg7 9.Bc6 bc6 +=.

5.Nf3 Nc6 6.Bb5 Nh6 7.a3 Rg8 8.Bh6 +-.

5.Nf3 Nc6 6.Bh8 Nh6 7.c3 Bd6 +-.

5.Nf3 Kf7 6.Bh8 Nh6 7.Ne5 fe5 8.Qh5 Kg8 9.Be5 +-.

5.Nf3 Kf7 6.Bh8 Nh6 7.Ne5 fe5 8.Qh5 Kg8 9.Qh6?! Kh8 10.a3 Bf8 +-.

5.Qh5 Kd7 6.Bh8 Qe7 7.Bb5 c6 8.Ba4 b5 9.Bb3 Na6 10.c3 Ba5 11.Ne2 b4 12.0-0 Rb8 13.c4 Nc5 14.Qg4 (better is 14.d4!? Nb3 15.ab3 Bc7 16.Ra7 dc4 17.bc4 Bb7+-) 14...Ba6 15.f4 (better is 15.d4 Nh6 16.Qh5 Nb7 17.Qh6 Rh8+-) 15...dc4 16.Bc2 c3 17.f5 (17.dc3?! Nh6 18.Rd1 Kc7 19.Bf6 A) 19...Ng4?? 20.Be7 Ne3 21.Bd6 (< 21.Bc5 Nc2 22.Bd6 Kb7+-) 21...Kb7 22.Rc1+- (22.Bc5?! Nc2 23.Nd4 Na1+-; 22.Bb8?! Nc2 23.Ba7 Be2+-); B) 19...Qf6+-) 17...Be2 18.Qe2 Qd6 19.d4 Nb7 20.Bb3 (better is 20.fe6!? Ke7+-) 20...ef5 21.Rf5 c5 (21...Bc7 22.Rf4 Nh6 23.Bf6 Rf8+-) 22.Rd5 (22...Qd5 23.Bd5+-) 1–0. willi_weizenkeim – RookedRalph, HCL–B2449 playchess.de, 2003.

5.Qh5 Kd7 6.Bh8 Qe7 7.Nf3 Nc6 8.Bb5 a6 9.Bc6 bc6 10.Nc3 a5 11.0-0 h6 12.e4 Qh7 13.Ne5 (better is 13.ed5 cd5 14.Nd5 Qh8 15.Qf7 Ne7 16.Nf6 Kd8+-) 13...fe5 14.Qe5 (14.Be5 de4 15.Qg4 Bd6+-) 14...Bc3 (14...Bd6 15.Qd4 c5 16.Qa4 Kd8+-) 15.Qc3 Qe4 16.Rfe1 Qg6 17.Qg3 (better is 17.Be5!? Ne7+-) 17...Ne7? (17...Qg3 18.hg3 c5 19.Bg7+-) 18.Qg6 (better is 18.Qa3!? Ba6 19.Be5 Bb5+-) 18...Ng6 19.Bg7 h5 20.Re3 Rb8 21.Rb3 Rb5 22.d3 Nf4 23.g3 Ng6 24.c4 Rb4 25.Rb4 ab4 26.c5 Ba6 27.d4 Bc4 28.Rb1 Ba2 29.Rb4 Bc4 30.Rb8 e5 31.de5 Ke6 32.f4 Ne7 33.Kf2 Kd7 (33...Nf5 34.Re8 Kd7+-) 34.Bf6 Nf5 (34...d4 35.Be7 Ke7 36.f5+-) 35.h3 d4 36.g4 hg4 37.hg4 Ne7 (37...Ne3 38.Rd8 Ke6 39.f5 Nf5 40.gf5 Kf5 41.Rd4+-) 38.Be7 Ke7 39.Rb4 Be6 40.f5 Bd5 41.Rd4 Kf7 (41...Be6 42.Ke3 Bb3 43.g5+-) 1–0. Lopez Gajete,Antonio – Ranea Exposito,A, Malaga ESP Primera ch, 1998.

5.Qh5 Kd7 6.Bh8 Nh6 7.c3 (7.Qh4 Qh8 8.Qb4 Kd8+-) 7...Qh8 (7...Bd6 8.Qh6 Qh8 9.Bd3+-) 8.cb4 f5 (8...Qf8 9.Nf3+-) 9.d4 Qg7 10.Nf3 Nc6 (10...Ng4 11.Nbd2+-) 11.b5 Nb4 12.Ne5 Kd6 13.Qh4 Bd7 14.Kd2 Nf7 15.Qg3 Qg3 16.Nf7 Ke7 17.hg3 (17...Bb5 18.Bb5 Kf7 19.Rh7 Kf6 20.Rc7+-) 1–0. pierred (2595) – eduardobandeira (2100), net–chess.com, 2008.

5.Bh8 Nc6 6.Bb5 Bd7 7.Bc6 (7.Qh5 Kf8 8.Nf3 (8.Nc3 Ne5 9.Nge2 Bc3 10.Nc3 Bb5 11.Nb5) 8...Qe7 9.Nc3 Bc3 10.dc3 Nb4 11.Bd3) 7...Bc6 8.Qg4 Ne7 (8...Be7 9.Qe6 Nh6 10.Bf6 Qd6 11.Qe7) 9.Qb4 Qd7 (9...Kf7 10.Bf6! Kf6 11.Qf4 Kg7 12.Qe5 Kf7+-) 10.Bf6 Ba4 (10...Ng6 11.Nf3+-; 10...d4 11.Nf3) 11.Be7 Bc2 12.Bg5 (12.Qb7 Rc8 13.Bc5 Be4+-) 12...Be4 13.f3 (13.Qb7 Rc8 14.f3 Bf5+-) 13...Bg6 14.Qb7 Rc8 15.Nc3 (15.Qa7 c5 16.Qd7 Kd7+-) 15...a5 16.Nge2 (16.Nb5 h6 17.Na7 hg5 18.Nc8 c5+-) 16...h5 17.Qb5 (better 17.Nb5 Kf8 18.Rc1 Kg8+-) 17...Qb5 18.Nb5 c6 19.Nd6 Kd7 20.Nc8 Kc8 21.Nf4 (better 21.Rc1 Kb7+-) 21...e5 22.Ng6 e4 23.fe4 de4 24.Ne7 Kc7 25.Rc1 c5 26.Rc5 Kd6 27.Rd5 Ke6 (27...Kc7 28.Ke2 Kb6 29.Rb1 Ka6 30.Nc6 a4 31.Ra5) 28.Rf1 a4 29.Ra5 (29.Rf6 Ke7 30.Ra6 Kf7 31.Rd7 Ke8 32.Re7 Kf8 33.Ra8) 29...Kd6 (29...h4 30.Rf6 Ke7 31.Ra7 Ke8 32.Rd6 a3 33.Rd8) 30.Rff5 (30.Rf6 Ke7 31.Ra7 Ke8 32.Rd6 h4 33.Rd8) 30...Ke6 (30...a3 31.Rad5 Kc7 32.Bf4 Kb7 33.Ra5 h4 34.Rfb5) 31.Rfe5 (31.Rad5 h4 32.Nc6 a3 33.Nd4) 31...Kf7 (31...Kd7 32.Rad5 Kc7 33.Re4 Kb6 34.Rb4 Ka6 35.Nc6 h4 36.Ra5) 32.Ra6 (32.Nd5 Kf8 33.Re7 h4 34.Ra8) 32...Kg7 (32...a3 33.Rf6 Kg7 34.Nf5 Kh7 35.Re8 h4 36.Rh6) 33.Nf5 Kh7 (33...Kg8 34.Re7 h4 35.Ra8) 34.Re7 Kg8 35.Ra8 1–0. Herciu,Ana_Maria – Badulescu,Maria, CN Juniori F14, 2012.

5.Bh8 Nc6 6.Qh5 Kd7 (6...Kf8 7.Bd3+-) 7.Qh7 Be7 (7...Nce7 8.a3 Ba5 9.Nf3+-) 8.Nf3 b6 (8...Qf8 9.c4 Ke8 10.Bd3+-) 9.c4 Bb7 (9...Na5 10.cd5 ed5 11.Nc3+-) 10.cd5 ed5 11.Qh3 (11.Qf5 Ke8 12.Qh5 Kf8+-) 11...Ke8 12.Qh5 Kd7 13.Qg4 Kd6 14.Nc3 a6 15.Bd3 Qf8 16.Bf5 Nh6 17.Qf4 Ne5 18.Ne5 Nf5 19.Ng6 (19.Ng6 Ke6 20.Nf8 Rf8 21.Qg4+-) 1–0. Ddgs – Shatri, internet, 2019.

5.Bh8 Qd6 6.Qh5 Kd7 7.Qh7 (7.Qh7 Ne7 8.Bf6+-) 1–0. Karl – ncn, internet private, 2018.

5.Bh8 Kd7 6.Bd3 +-.

5.Bh8 e5 6.Qh5 Kd7 7.Qg4 Kd6 8.Qb4 c5 9.Qh4 h6 10.c4 Be6 11.cd5 Bd5 12.Nc3 Bc6 13.Rd1 Kc7 14.d4 cd4 15.ed4 ed4 16.Qd4 Qe8 17.Qe3 Qg6 (17...Qe3 18.fe3 Nd7 19.Nb5 Kb6 20.Nd6+-) 18.Qd3 (18.Nf3 Nd7 19.Nb5 Kd8 20.Na7 Ba4+-) 18...Qe8 (18...Qd3 19.Rd3 Na6 20.Ke2+-) 19.Nge2 Nd7 20.Nd5 Kb8 (20...Kc8+-) 21.Qg3 Ne5 22.Nf6 Nf6 23.Bf6 a6 24.Be5 Ka7 (24...Qe5 25.Qe5 Ka7 26.Qc5 b6 27.Qc6 Rc8 28.Rd7 Rc7 29.Rc7 Kb8 30.Qb7) 25.Qe3 (25.Bd4 b6 26.Qc7 Bb7 27.Bb6) 25...b6+- 26.Qh6 a5 27.Qg7 Bb7 28.Nc3 Qc6 29.Nb5 (29...Ka6 30.Nd4 b5 31.Nc6 Rc8 32.Bb5 Kb6 33.Bd4 Kb5 34.Qb7 Kc4 35.Na5) 1–0. Rempe,Torge – Carl,Sven, Schleswig Holstein–chB U16, 2001.

5.Bh8 e5 6.Qh5 Ke7 7.Qh7 (7...Kd6 8.a3+-) 1–0. mrkt – dralissa, Internet, 2005.

5.Bh8 e5 6.Qh5 Ke7 7.Qh7 Ke6 8.e4 +-.

5.Bh8 Be7 6.Qh5 1–0. GuestCPYG – GuestYBQX, freechess.org, 2016.

5.Bh8 Kf7 6.Qh5 Ke7 7.Qh7 Kd6 8.Nf3 Qe7 9.Qg8 Nd7 10.Qg3 (10.a3 Ba5 11.Nd4 Nf8+-) 10...e5 11.c3 Ba5 12.d4 b6 13.de5 Ne5 14.Qf4 Ke6 15.Ne5 fe5 16.Qe5 Kd7 17.Bb5 c6 18.Bc6! Kc6 19.Qe7 Bd7 20.Be5 Bf5 21.Qd6 Kb7 22.Qd5 Ka6 23.Qc4 (23.Qa8 Be6 24.Qc6 Bg4 25.Na3 Bb4 26.cb4 Bf5 27.Nc4 Be4 28.b5) 23...Kb7+- 24.Qd5 Ka6 25.Qa8 (25.Qa8 Be6 26.Qc6 Bc3 27.Nc3 Bg8 28.Rb1 Bc4 29.Rb6 Ka5 30.Qc4 ab6 31.Qb5) 1–0. GuestCMZR – GuestYYYD, freechess.org, 2020.

5.Bh8 Kf7 6.Qh5 Kf8 7.Qg4 (better is 7.Qh7!? Qe7 8.Qh5 e5+-) 7...e5 (7...Qe7+-) 8.Qb4 (8...Kf7 9.Qh4+-; better is 8.Qg7!? Ke8 9.Qg8 Kd7 10.Qg4 Ke8 11.Qb4 Kf7+-) 1–0. Anden – bartho149, Live Game Caissa's Web, 2004.

5.Bh8 h6 6.Qh5 Kd7 7.Qf7 1–0. GuestZSCT – GuestQFFS, freechess.org, 2020.

5.Bh8 h6 6.Qh5 Ke7 7.Be2 d4 (7...Qe8 8.Qe8 Ke8 9.Nf3+-) 8.Qg6 (8.ed4!? Qe8+-) 8...de3 9.fe3 Kd6 (9...Qe8 10.Qe4 Bd6 11.Nf3+-) 10.Nf3 b6 (10...c5 11.c3 Ba5 12.Na3+-) 11.0-0 (better 11.Qd3 Ke7 12.Qe4 Nc6 13.Qc6 Bd7+-) 11...Kc6 (11...Nc6+-) 12.Qe4 Qd5 13.Qb4 Bb7 (13...Kb7 14.Nd4 Qd7 15.Bf6 Nf6 16.Rf6+-) 14.Nd4 (better 14.Bb5! Qb5 15.Nd4 Kd7 16.Qb5 Nc6 17.Bf6 a6+-) 14...Kd7 15.Bb5 (better 15.Bf3 Nc6 16.Bd5 Nb4 17.Bb7 Rb8+-) 15...Bc6 16.Bc6 (16.Nc6 Nc6 17.Nc3 Qd6+-) 16...Nc6 17.Nc6 (17.Qa4 Nge7 18.Nc3 Qa5+-) 17...Kc6 (17...Qc6 18.Qd4 Qd6 19.Bf6+-) 18.Nc3 Qd2 (18...Qd8+-) 19.Qe4 Kd7 20.Rad1 Qd1 (20...Qd6 21.Rd6 Kd6 22.Rd1 Ke7 23.Qh7 Kf8 24.Qg7 Ke8 25.Qd7 Kf8 26.Bg7) 21.Rd1 (21.Rd1 Ke7 22.Qh7 Kf8 23.Qg7 Ke8 24.Qd7 Kf8 25.Bg7) 1–0. GuestCWWF – GuestLPCQ, freechess.org, 2016.

5.Bh8 Nh6 6.Qh5 Kd7 +-.

5.Bh8 Nh6 6.Qh5 Nf7 7.Qh7 Qe7 8.Nf3. GuestRTFM – GuestTQVJ, freechess.org, 2018.

5.Bh8 Nh6 6.Qh5 Kf8 7.Qh6 Kg8 (7...Ke8 8.Bf6 Be7 9.Qh5 Kf8+-) 8.Qg7 1–0. GuestHJQM – BigggMan, freechess.org, 2017.

6.c3 Bd6 7.Qh5 Qf7 8.Be2 Qh5 9.Bh5 Kf8 10.f4 (10.Be2 e5+-) 10...Be7 (10...Nd7 11.Bg4 Kf7 12.f5 ef5 13.Bf5+-) 11.g4 Nh6 12.Nf3 White plans g5 12...Kg8 (12...Nf7 13.Bf7 Kf7 14.g5+-) 13.g5 1-0. Mely (2165) - D11j22 (2035), ChessWorld.net, 2018.

6.c4 h6 7.Qh5 Qf7 8.Qf7 Kf7 9.a3+-.

6.c4 Nh6 7.Qh5 Nf7 8.Qh7 Nh8 9.Qh8 Kd7 10.cd5 ed5 11.Be2 (11.Nc3!? c6+-) 11...Qe5 12.Bg4 (12.Nc3 Bc3 13.Qg7 Ke6+-) 12...Kc6 13.Nc3 (better 13.Qc8 Qa1 14.Qe6 Bd6+-) 13...Bg4 14.Rc1 d4 (14...Ba3 15.Rc2 Bd6+-) 15.Nce2 Kd6 (15...Kb6 16.Nd4 Qd6 17.Rb1+-) 16.Qd8 Ke6 (16...Nd7 17.Qa8 de3 18.fe3 Qe3 19.Rd1+-) 17.Nd4 Kf7 18.Rc7 Be7 (18...Nd7 19.Rd7 Bd7 20.Qa8 Qe4+-) 19.Re7! Qe7 20.Qh8 (20.Qd5 Kg7+-) 20...a5 (20...Qe4 21.f3 Qb1 22.Kf2+-) 21.h3 Be6 22.Qh5 Kf8 23.Qh8 Bg8?? (23...Kf7 24.Qh7 Ke8 25.Qe7 Ke7 26.Ne6 Ke6+-) 24.Nf5+- Qe5 (24...Qc7 25.Qf6 Ke8 26.Ng7 Kd7 27.Qf5 Ke7 28.Qe4 Kf8 29.Ne6 Be6 30.Qe6 Nd7+-) 25.Qg7 Ke8 26.Qg8 Kd7 27.Qf7 Kc6 (27...Kc8 28.Ne7 Kd8 29.Qf8 Kd7 30.Qc8 Ke7 31.Qb7 Nd7 32.Qa8 Qa1 33.Ke2 Qa2 34.Qe4 Kd8 35.Nf3+-) 28.Nd4 (28.Ne7 Kb6 29.Nd5 Ka7+-) 28...Kb6 29.Ngf3 Nc6 (29...Qe4 30.Qf6 Nc6+-) 30.0-0 (30.0-0 Qe4 31.Qf6+-) 1–0. GuestNSQH – GuestBXBF, freechess.org, 2017.

6.Bd3 Kf7 7.Qh5 Kf8 8.Bh7 Bd7 9.a3 (9.Nf3 Be8 10.Qh4 Nd7+-) 9...Ba5 (9...Bd6 10.Nc3+-) 10.Ne2 (10.Nf3 Na6+-) 10...Nc6 (10...Be8 11.Qh3 Nd7 12.Nbc3+-) 11.Nf4 Be8 12.Qh3 Ne5 (12...Nd8+-) 13.Ne6 Kf7 14.Bf5 Ba4 (14...Nh6 15.Qh6 Bc6 16.Qh5 Kg8 17.Bf6 Qg7 18.Bg7 Nf3 19.Kd1 Ng5 20.Bg6 Ne6 21.Qh7) 15.Qh5 Ng6 16.Qg6 1–0. GuestPDGQ – pnhariss, freechess.org, 2020.

6.Nf3 Nc6 7.Bb5 (7.c3 Bd6+-) 7...Bd7 8.Bc6 (8.a3 Bd6+-) 8...Bc6 9.0-0 (9.Nd4 Bd7+-) 9...0-0-0 (9...h5 10.c3 Bd6 11.Qc2+-) 10.c3 (10.Nd4 Nh6 11.Qh5 Bd7+-) 10...Bd6 (10...Bc5 11.d4 Bd6+-) 11.a4 (better is 11.Nd4 Nh6 12.Qh5+-) 11...Nh6 12.Bf6 Qf6 13.d4 (13.Nd4 Qh4 14.h3 Rg8+-) 13...Rg8 14.h3 (14.Nbd2 Nf7+-) 14...Be8 (14...Qg6 15.Ne1+-) 15.Nbd2 Bh5 16.a5?? Qg7-/+ (17.g3 Nf5-+) 0–1. gtate (1980) – sirky (1985), net–chess.com, 2005.

6.Qg4 Qf7 7.Qb4 1–0. guest114 – guest320, chessclub.com, 2018.

6.Qg4 Qf8 +-.

6.Qg4 Nh6 7.Qh5 Kd7 8.Qh6 1–0. GuestVLCG – GuestXXGF, freechess.org, 2018.

6.Qg4 Nh6 7.Qh5 Nf7 8.Qh7 Nh8 9.Qh8 Kd7 +-.

6.Qh5 Kd7 7.a3 Bd6 8.Nf3 h6 9.c3 (better 9.Bb5 c6 10.Qg6+-) 9...Qh7 10.c4 Qh8 11.cd5 ed5 12.Nd4 (12.Qd5!? Ne7 13.Qf7 Nbc6+-) 12...Ne7 13.Be2 (13.Nb5 Qg7+-) 13...c5 (13...Be5 14.Nc3 Bd4 15.ed4+-) 14.Bb5 (14.Nf5!? Nf5 15.Qf5 Kc6+-) 14...Kc7 15.Nb3 a6 (15...Qg7 16.g3+-) 16.Be2 Nbc6 17.Nc3 Be6 18.Rc1 (18.d4!? cd4 19.Nd4 Nd4 20.ed4+-) 18...Rg8 19.Nd5?? (better 19.d4!? c4 20.Nc5 Bc5 21.dc5 Rg2 22.Bf1+=) 19...Nd5 (19...Bd5 20.Nc5 Rg5 21.Qh4 Bg2 22.Ne6 Kb8 A) 23.Ng5?? fg5 (23...Bh1?! 24.Nf7 Qg7 25.Rc6=+) 24.Qh5 Bh1-+; B) 23.Rg1=+) 20.Nc5=+ Bc5 21.Rc5 Rg5 (21...Kd6 22.d4 Rg2 23.Qf3=) 22.Qh4 (22.Qf3 Qf8 23.d4 b6 24.Rc6 Kc6+=) 22...Kb8 (22...Kd6 23.d4 Rg2 24.e4 Nd4 25.ed5 Kc5 26.de6=+) 23.Bf3 (23.0-0 Qg7 24.g3 Nc7+-) 23...Nde7 (23...Ne5 24.Ke2 Ne3 25.Bb7 A) 25...Kb7 A1) 26.fe3?? Bg4 (worse 26...Rg2 27.Kf1 Rg4 28.Qe1-+) 27.Kf1 Qh7 28.Re5 fe5-+; A2) 26.de3 Rg4 27.Rb1 Ka8-/+; A3) 26.Rb1 Ka8 27.Qe4 (27.de3 Qh7 28.Rd1 Bg4 29.f3 Bf3 30.gf3 Rg2 31.Kf1 Rg1 32.Kf2 Rd1 33.Qf6 Nd3 34.Ke2 Nc5 35.Qc6 Kb8 36.Qb6 Nb7 37.Kd1 Qd3 38.Ke1 h5-+; 27.fe3 Rg2 28.Kf1 Rg1 29.Kg1 Nf3 30.Kf2 Nh4-+) 27...Nd5 28.Rd5 Qc8 29.Rd8 Ka7 30.Qd4 Ka8 31.Qb6 Bc4 32.Kd1 Be2 33.Ke2 Qd8 34.Qa6; B) 25...Ng2 26.Rb1 Bd7 27.Bg2 Bb5 28.Rbb5 ab5 29.Rb5 Kc8 30.Qa4+-; C) 25...Qf8+=) 24.Rg5 fg5 25.Qg3 Ka8 26.Bg4 (26.0-0!?+-) 26...Nf5 (26...Qa1 27.Bd1=+) 27.Bf5= Bf5 (27...Qa1 28.Ke2 Bc4 29.d3 Qb2 30.Ke1 Qc1 31.Ke2 Qb2 32.Kf1 Qc1 33.Ke2 Qb2=) 28.0-0 Bd3 29.Rc1 (29.Rd1 Qb2+=) 29...Qf6 (29...Qb2 30.Rd1=+) 30.h3 (30.Qc7!?+-) 30...Qb2= 31.Rc3 Bb5 (better 31...Qd2!? 32.Rc6 bc6=) 32.Qd6+- Qb1 33.Kh2 Qf5 34.d4 (34.f3 Qh7+-) 34...h5? (better 34...Qf2 35.Qh6 g4=) 35.d5+- Qe5 36.Qe5 Ne5 37.f4 gf4 38.ef4 Nd7 39.f5 Nf6 40.d6 Ne4 (40...Kb8 41.Re3 Bd7 42.Re7+-) 41.Rc8 (41.Rd3! Nf6 42.Rd4 Kb8+-) 41...Ka7 42.Rd8 (42.Rh8 Kb6+-) 42...Kb6 43.g4 (43.Rh8!?+-) 43...hg4+- 44.hg4 Be2?? (44...Bc6 45.Kh3 Kc5 46.Kh4 Nd6 47.f6+-) 45.Kh3 (better 45.Re8 Nd6 46.Re2 Kc6+-) 45...Ng5? (better 45...Kc6+-) 46.Kh4+- Nf7 47.Rd7 Ne5 (47...Nh6 48.f6 Bc4 49.Re7+-) 48.Re7 Bg4 (48...Nf3 49.Kg3 Bd1 50.f6+-) 49.Re5 Bf5 50.Rf5 Kc6 51.Rf6 Kd7 (51...b6 52.Kg4 Kd7 53.Kf5+-) 52.Kg4 b5 (52...b6 53.Kf5 b5+-) 53.Kf4 a5 54.Ke4 b4 55.ab4 (55.Kd5 a4 56.Rf7 Kd8 57.Rh7 b3 58.Kc6 Ke8 59.d7 Kd8 60.Kd6 b2 61.Rh8) 55...a4 (55...Kc6 56.b5! Kb5 57.d7 Kc5 58.d8Q Kb4 59.Rb6 Ka3 60.Qd2 a4 61.Qb2) 56.Kd4 (56.Kd5 a3 57.Rf7 Kd8 58.Kc6 Ke8 59.Rf6 a2 60.Kc7 a1Q 61.d7 Ke7 62.d8Q) 56...a3+- 57.Kd5 a2 58.Rf1 Kd8 (58...a1Q 59.Ra1 Kd8 60.Ke6 Kc8 61.d7 Kc7 62.Ra8 Kb7 63.d8Q Kc6 64.Qd6 Kb7 65.Rb8 Ka7 66.Qb6) 59.Ra1 (59.Ra1 Ke8 60.Ke6 Kd8 61.Ra2 Kc8 62.d7 Kc7 63.Ra8 Kc6 64.d8Q Kb5 65.Qd3 Kb4 66.Rb8 Kc5 67.Qd5; 59.Kc6 Ke8 60.Kc7 a1Q 61.d7 Ke7 62.d8Q Ke6 63.Qd6) 1–0. GuestHJQM – GuestYNMV, freechess.org, 2017.

6.Qh5 Kd8 7.Bd3 f5 8.Nf3 (8.c3 Bd6+-) 8...Nd7 9.Ne5 (9.Nc3 Ngf6 10.Qg5 Bd6+-) 9...Ngf6 10.Qh4 (10.Nf7 Ke8 11.Nd6 Kd8 12.Nc8 Kc8+-) 10...Ng8 (10...Bd6 11.Nd7 Nd7 12.Qh6+-) 11.Qe7 Ne7 12.Nd7 Bd7 13.Bc3 Bc3 14.Nc3 a6 15.h3 c5 16.g4 Bc6 17.Rg1 c4 18.Bf1 b5 19.gf5 Nf5 20.Rg8 Kc7 21.Ra8 Ba8 22.Bg2 Nh4 23.Bh1 b4 24.Ne2 Kd6 25.a3 ba3 26.Ra3 Bb7 27.d3 cd3 28.cd3 Nf5 29.e4 Ne7 30.Kd2 h6 31.Nd4 de4 32.Be4 Bc8 33.Ra5 Ng8 34.Rh5 e5 35.Nf3 Nf6 36.Rh6 Ke6 37.Kc3 (37...a5 38.d4 ed4 39.Kd4+-) 1–0. Wedding,Robin (1620) – Rogers,Henry, CP.2001.P.00090, 2001.

6.Qh5 Kd8 7.Bd3 h6 8.Nf3 +-.

6.Qh5 Qf7 7.Qf7 Kf7 8.Bd3 f5 +-.

6.Qh5 Qf7 7.Qf7 Kf7 8.Nf3 Nc6 9.g4 Bd7 (9...Nce7 10.Nh4+-) 10.g5 f5 (10...e5 11.Rg1+-) 11.Nc3 Nge7 12.Bf6 Ng6 (12...Ng8 13.Ne5 Ne5 14.Be5+-) 13.Rb1 Bc3 (13...Rb8 14.h4+-) 14.Bc3 b6 15.h4 f4 (15...a5 16.h5 Nf8 17.a3+-) 16.h5 (16.Bd3 Rg8+-) 16...Nf8 (16...Nge7 17.Bd3 Nf5 18.e4+-) 17.Bd3 e5 (17...Ne7 18.Ne5 Kg8 19.g6+-) 18.Ne5 Ne5 19.Be5 fe3 (19...f3 20.g6! hg6 21.hg6 Ng6 22.Rh7 Ke6 23.Bg6 Ke5 24.Rd7+-) 20.fe3 (20.de3 Bc6+-) 20...c6 21.g6! hg6 22.hg6 Ng6 23.Rh7 Ke6 24.Bg6 Ke5 25.Rd7 1–0. Janek – Diordi, internet free game, 2017.

6.Qh5 Qf7 7.Qh4 Nd7 8.Bd3 (better is 8.Qb4 Ne7+-) 8...h5 (8...Bd6 9.Bh7 Ne5 10.Nc3+-) 9.Nh3 (better is 9.Qb4 Ne5 10.Qh4 Nd3 11.cd3 Qg6+-) 9...Ne5 (9...Bd6 10.Be2 Kf8 11.Bb5+- (11.Bh5?! Qh7+-)) 10.Qb4 (better is 10.Be2 Bd6+-) 10...Ng6 11.Bg6 Qg6 12.Qh4 e5 13.Nc3 Qg2 14.Qh5 Kd7 15.Rg1 Qh2 16.0-0-0 c6 17.Rg8 Kc7 18.Qf7 Kb6 19.Rg7 Qh3 20.Nd5 Ka6 21.Nc7 Kb6 22.Na8 Kb5 23.Qb3 Kc5 24.d4 (24...Kd6 25.de5 Ke5 26.Qc3 Ke4 27.Rd4 Kf3 28.Rf4 Ke2 29.Qd2 Kf1 30.Qd1; 24.Qa3 Kd5 25.f3 Qd7 26.Rd7 Bd7 27.Nc7 Kc4 28.d3) 1–0. Baker,Tim – Lafargue,Philippe, IECC, 2000.

6.Qh5 Qf7 7.Qh4 Be7 8.Bd3 f5 9.Qg3 +-.

6.Qh5 Qf7 7.Qh4 Be7 8.Be2 Qf8 (8...Kd8 9.Nf3+-) 9.Qh7 Nh6 (9...f5+-) 10.Bg7 Qg8 11.Qh6 (11.Bh6? Qh7 12.Bf4 Qc2-/+) 11...Nc6 12.Bh5 Kd7 13.h4 Ne5 (13...e5 14.Bf6 Qg2 15.Bf3+-) 14.Bf6 Qg2 15.Qh7 Qh1 16.Be8! Kd6 (16...Ke8 17.Qe7) 17.Qe7 (17.Be7?!=) 1–0. pierred – horn21, ChessWorld.net, 2005.

5.Bh8 c5 6.Qf3 Qa5 7.c3 Bc3 8.Nc3 d4 9.ed4 cd4 10.Bb5 Nbd7 11.Bd7 Bd7 12.Ne4 0-0-0 13.Bf6 d3 14.Rc1 Kb8 15.Bd8 Qa2 16.Nd6 Qd5 17.Bc7 Ka8 18.Qf7 a6 19.Qf8 Ka7 20.Qb8 1–0. saetta – chekin, ICS, 1999.

5.Bh8 d4 6.Bf6 (6.ed4 Qd4 7.c3 Qe4 8.Be2 Be7+-) 6...Qf6 7.c3! dc3 8.Qa4 (8.a3 cd2 9.Nd2 Bd2 10.Kd2 Qf2 11.Qe2 Qf6+-) 8...Nc6 (8...Bd7 9.Qb4 cd2 10.Qd2 Qa1+-) 9.Qc2 (9.d4 e5 10.Bb5 c2 11.Nd2 ed4 12.e4+- (12.Qc2 de3 13.Bc6 bc6 14.Qe4 Be6 15.fe3 Qa1 16.Kf2 Bd2 17.Qc6 Ke7 18.Qc7 Bd7 19.Qc5 Ke8-+)) 9...cd2-+ 10.Nd2 Qa1 11.Qd1 Qa2 12.Ngf3 f5 13.Bc4?? Bd2 14.Nd2-/+ Qa5 15.Qh5= Kd8 16.Qg5 Ne7 17.Ke2 Bd7 18.Qg7 b5 19.Qf8 Be8+= 20.Be6 c5?? 21.Bf7 Kc7 22.Qe7 Bd7 23.Qc5 Kb7 24.Bd5 Kb8 25.Ba8 Ka8 26.Qd5 Kb8 27.Qd7 b4 1–0. tanto – pchandler, net–chess.com, 2001.

5.Bh8 Bd6 6.Bd3 (6.c4 Nbd7+-) 6...Kd7 (6...e5+-) 7.c4 (better 7.Bg7+-) 7...Qh8 8.Nc3 dc4 (8...Qg7 9.g3+-) 9.Bc4 Nc6 (9...Qg7 10.g3+-) 10.Nf3 (10.Bb5 Nd5 11.Bc6 bc6+-) 10...b6 (10...a6 11.Rc1+-) 11.Qa4 (11.Bb5 Bb7+-) 11...Bb7 12.Nd4 (better 12.Nb5!?+-) 12...a6+- 13.Qb3 (13.Rc1 Qc8+=) 13...b5 (13...Nd4 14.ed4 Bg2 15.Rg1-/+) 14.Be6 (better 14.Nc6!? Bc6 15.Bf1+=) 14...fe6= 15.Qe6 (15.Ne6? Na5 16.Qc2 Ke6-+) 15...Kd8 16.Nf5?? (better 16.Nc6 Bc6 17.f3=+) 16...Bc8-+ 17.Qf7 (17.Qb3 Bf5 18.0-0 Bd3-+) 17...Bf5 18.0-0 (18.Qb3 Qg7 19.g3 Ne5-+) 18...Bg6 (18...Bd3!? 19.Qe6-+) 19.Qe6 Qe8 (better 19...Bd3-+) 20.Qf6= Be7. DEFFM – GuestXPKC, freechess.org, 2018.

5.Bh8 Kd7 6.c3 Bc3 7.Nc3 Qh8 8.Qa4 (8.d4 Qg7+-) 8...c6 (8...Kd8 9.d4+-) 9.Be2 (9.d4 Qd8+-) 9...Ne4 10.Ne4 (better is 10.Rc1 Nc3 11.dc3+-) 10...Qa1+= 11.Bd1 de4 12.Qe4 Qg7 (12...Qa2 13.Qh7 Ke7 14.Nf3+=) 13.Ne2 (13.d4 Ke8+=) 13...Qg6 14.Qf3 Ke7 15.0-0 (15.d4 Nd7+=) 15...Nd7 (15...e5!?=) 16.Nf4+= Qf5 (16...Qg5+=) 17.e4 (17.d4 Ke8+/–) 17...Qg5 (17...Qf6 18.d4 Qd4 19.Bc2=) 18.d4+= b6 (18...e5 19.de5 Ne5 20.Qe3=) 19.e5 Bb7 20.Bc2 Rb8 21.Be4 Rc8 22.Rc1 Rd8 23.Bc6+- Ne5? 24.de5 Bc6+/– 25.Rc6 Qf4+- 26.Qa3 Ke8= 27.g3?? Qe4 28.Rd6= Rd6 29.Qd6 Qb7 30.a3 a5 31.f4+= b5 32.f5 Qc8 33.f6+= Qd8 34.Qc6 ½–½. Ramos Bonilla,Ibsen – Nusbaum,Bryan, compuserve, 1995.

5.Bh8 Kd7 6.Bf6 Qf6 7.Nc3 (7.c3!? Kd8+-) 7...Bc3 8.dc3 Nc6 (8...Qc3 9.Ke2+-) 9.Qd2 Nb4 (9...Ke8 10.Bd3+-) 10.a3 (10.cb4?! Qa1 11.Qd1 Qc3 12.Qd2 Qa1 13.Ke2 Qa2+-) 10...Nc6 11.Bb5 a6 12.Bc6 bc6 13.Nf3 Bb7 14.0-0 c5 15.Rab1 d4 16.Rb7 e5 17.cd4 ed4 18.ed4 cd4 19.Nd4 Re8 20.Nb5 Kc6 21.Rc7 Kb5 22.Qb4 1–0. MarcosRamos – grandslam842, internet, 2007.

5.Bh8 Kd7 6.Bg7 Ne4 7.a3 Ba5 (7...Be7 8.Bb2+-) 8.Nc3 Bc3 9.Bc3 Nc3 10.dc3 b6 (10...c5 11.Nf3+-) 11.c4 Bb7 (11...Ke7 12.Qd3+-) 12.cd5 ed5 13.Bb5 Kd6 14.Nf3 Qf6 (14...Nd7 15.0-0 Qf6 16.c4+-) 15.0-0 (15.c4 a6 16.Ba4 b5 17.cb5 ab5 18.Bb5 c6+-) 15...c6 (15...Nd7 16.Bd7 Kd7 17.e4+-) 16.Bd3 Nd7 (16...Kc7 17.a4+-) 17.c4 Rg8 (17...Nc5 18.cd5 cd5 19.Nd4+-) 18.cd5 cd5 19.Nd4 Ne5 (19...Kc7 20.Bh7 Rh8 21.Bf5+-) 20.Bh7 Rh8 (20...Rc8 21.Qa4 a6 22.Bf5+-) 21.Rc1 Rh7 (21...Nc4 22.Bd3 Kc7 23.Bc4 dc4 24.Rc4 Kb8 25.Qg4+-) 22.Qc2 Nc4 (22...Nc6 23.Nb5 Kd7 24.Qh7+-) 23.Qh7 (23.Qh7 a6 24.Rfd1+-) 1–0. GuestYFRK – fakf, freechess.org, 2020.

5.Bh8 Kd7 6.Bg7 Ke7 7.Bf6 Kf6 8.Qg4 e5 9.Qh4 Ke6 10.Qd8 Nc6 11.Qe8 Ne7 12.Nf3 1–0. marekt – chessboy, gameknot.com, 2001.

5.Bh8 Kd7 6.Bg7 Ke8 +-.

5.Bh8 Kd7 6.Bg7 Bf8 7.Bf8 Qf8 8.a4 1–0. Hilbert,Stephan J – Desouza,Romeo (1800), FICGS, 2014.

5.Bh8 Bd7 6.Qc1 Nc6 7.Qb2 Be7 8.Nf3 (8.Qb7?! Rb8 9.Qb3 Rb3 10.ab3 e5+-) 8...Ne4 9.Qg7 (9.Qb7?! Rb8 10.Qb3 Rb3 11.ab3 f6+-) 9...Bf6 10.Qg8 Ke7 11.Bf6 Nf6 12.Qg5 Kf8 (12...Qh8 13.d4+-) 13.Ne5 (13.Nc3 Nb4 14.Rb1 Nc2 15.Kd1 Na3 16.Rb7 Bc6+-) 13...Ne5 14.Qe5 c6 15.Bd3 Qb6 (15...Ke7 16.Nc3+-) 16.Qd6 (better 16.Qf6 Qd8 17.Qh6 Ke7 18.Qh4 Kf8 19.Qh7+-) 16...Kg7 17.Qe5 Qc5?? (17...Kf8 18.Qf6 Qd8 19.Qh6 Ke7 20.Qh4 Kf8 21.Qh7 Qf6+-) 18.h4 (18.Qg5 Kf8 19.Qf6 Ke8+-) 18...h5 (18...Qe7+-) 19.g4! hg4 20.Rg1 Qe7 21.Rg4 (better 21.Qg5 Kf8 22.Qh6 Ke8 23.Qh8 Qf8 24.Qf6 Qe7 25.Qh8 Qf8+-) 21...Kf8 22.Rg3 c5 23.h5 c4 24.Bh7 (better 24.h6!? Qd8 25.Qd6 Qe7+-) 24...Ne4 (24...Qd8+-) 25.Qh8 (25.Rg8) 1–0. GuestNLFQ – GuestTYBM, freechess.org, 2017.

5.Bh8 Bd7 6.Bd3 Bc6+-.

5.Bh8 Bd7 6.Nf3 Nc6 7.Be2 (7.Qc1 Be7+-) 7...Qe7 8.0-0 (8.a3 Ba5+-) 8...0-0-0 9.Bf6 Qf6 10.Nc3 Rg8 11.Na4 Ne5 12.Ne5 Qe5 13.c3 Bd6 14.g3 Qe4 15.d4 e5 16.Nc5 Bc5 17.Bf3 Qg6 18.dc5 e4 19.Bg2 f5 20.Qd5 c6 21.Qd6 Qd6 22.cd6 h5 23.Rab1 Be6 24.Rb2 Bc4 25.Rd1 Rg7 26.d7! Rd7 27.Rd7 Kd7 28.Rb7 Kd6 29.Ra7 (29...Be2 30.a4+-) 1–0. jonnyboy373 – Reynier, ChessWorld.net, 2004.

5.Bh8 (5...Nbd7 6.Nc3+-) 1–0. slavisa10 – MarcusBiMan, Live Game Caissa's Web, 2004.

5.Bh8 Nbd7 6.Bd3 b6 (6...e5 7.Bf5+-) 7.Nf3 Bb7 8.0-0 Qe7 9.Nc3 (9.a3 Bd6+-) 9...0-0-0 10.Bf6 Nf6 11.Nb5 Kb8 (11...a6 12.a3 Bc5 13.Nc3+-) 12.c3 Bc5 13.Qa4 a6 14.Nbd4 e5 15.Nf5 Qe6 16.Ng5 Qc6 (16...Qd7 17.Qd7 Rd7 18.Nh6+-) 17.Qc6 (17.Qc6 Bc6 18.Ba6+-) 1–0. DEFFM – IagoPrytherch, freechess.org, 2018.

5.Bh8 Nbd7 6.Nf3 e5 7.Be2 c5 (7...Bd6 8.Nc3+-) 8.c3 Ba5 9.Qa4 (9.d3 e4 10.de4 de4+-) 9...Bc7 10.Qh4 e4 (10...c4 11.0-0+-) 11.Ng5 Nf8 12.Bh5 (better is 12.Qh6!? Be5+-) 12...Ng6 13.Bg6 hg6 14.Ne6 Be6 15.Bf6 (< 15.Qf6 Bd6+-) 15...Qd6 16.c4 Bd8 (16...Rc8 17.cd5 Bd5 18.Nc3+-) 17.Nc3 Bf6 18.Qf6 Rd8 19.0-0 (19.Rb1 b6+-) 19...b6 20.Rfc1 Qc7 (20...Qe7 21.Qh8 Kd7 22.Qe5+-) 21.cd5 Bd5 22.Nd5 Rd5 23.Rc4 (23.Qh8 Kd7 24.Qf8 Rf5+-) 23...Qe5 24.Qe5 (24.Qc6 Kf8 25.Rac1 Kg7+-) 24...Re5 25.Ra4 a5 26.Rb1 Re6 27.g4 Kd7 28.h4 Kc6 29.Kf1 Re5 30.f3 ef3 31.Rf4 Re7 32.Rf3 Rb7 33.h5 f5 34.hg6 fg4 35.Rf6 Kd5 36.Rbb6 1–0. Woschkat,Karl_Heinz – Angsupun,Pallop, IECG M, 1996.

5.Bh8 Nbd7 6.Nf3 Ke7 7.Bf6 Nf6 8.Be2 c5 9.c3 Ba5 10.0-0 a6 11.Ng5 h6 12.Nf3 Bc7 13.d4 cd4 14.cd4 b5 15.Qc2 Bd7 16.Ne5 Be5 17.de5 Ne4 18.f3 Rc8 19.Qd1 Ng5 20.Qb3 Bc6 (20...Qa5 21.Bd3 Ke8 22.h4+-) 21.Qa3 Ke8 (21...Kd7 22.h4 Nh7 23.Bd3+-) 22.f4 (22.Qa6!? b4+-) 22...Ne4 23.Qa6 d4 (23...Nc5 24.Qa7 Ne4 25.Rc1+-) 24.Bb5 Bb5 25.Qb5 Kf8 26.Qb4 Rc5 (26...Kg7 27.Qd4 Qd4 28.ed4+-) 27.ed4 (27...Qa5 28.Qe1+-) 1–0. market (1855) – hector007 (1755), GameColony.com, 2002.

5.Bh8 e5 6.c3 +-.

5.Bh8 e5 6.Nf3 +-.

5.Bh8 Ke7 6.Bf6 Kf6 7.c3 Bc5 8.Qg4 e5 (8...Ke7+-) 9.Qh4 Ke6 10.Qd8 Bd7 11.g3 Be7 12.Qc7 Nc6 13.Bh3 f5 14.Bf5! Kf5 15.Qd7 Kf6 16.Qb7 Na5 17.Qa8 Nc4 18.Qd5 Nb2 19.Qb5 Nd3 20.Qd3 e4 21.Qe4 h5 22.Nf3 h4 (22...Kg7 23.Qe7 Kg8 24.Ng5 a6 25.Ne6 a5 26.Qg7) 23.Qe5 Kf7 (23...Kg6 24.Qe7 a6 25.Ne5 Kf5 26.d3 hg3 27.hg3 a5 28.Rh5) 24.Qf5 Ke8 (24...Bf6 25.Ne5 Kg8 26.Qf6 h3 27.Qf7 Kh8 28.Ng6) 25.Ne5 a5 (25...h3 26.Qc8 Bd8 27.Qd7 Kf8 28.Qf7) 26.Qc8 Bd8 27.Qd7 Kf8 28.Qf7 1–0. Pierre – Zmogen, internet, 2020.

5.Bh8 Ke7 6.Bf6 Kf6 7.c3 Bd6 1–0. Karl – Guest, internet, 2018.

5.Bh8 Ke7 6.Bf6 Kf6 7.Qh5 Ke7 (7...Nc6 8.Bb5 Qf8+-) 8.Qh4 Ke8 9.Qb4 Qd7 (9...Nc6 10.Qb2+-) 10.Nf3 Qd6 11.Bb5 Bd7 12.Bd7 Kd7 13.Qb7 Qa3 14.Na3 Nc6 15.Qa8 Nb8 16.Qb8 e5 (16...d4 17.Ne5 Ke7 18.Qc7 Kf6 19.f4 Kg7 20.Qf7 Kh8 21.Qf8) 17.Ne5 (17.Ne5 Ke7 18.Qc7 Ke6 19.f4 f5 20.Nb5 Kf6 21.Qf7) 1–0. DEFFM – GuestPPQV, freechess.org, 2019.

5.Bh8 Qe7 6.Nf3 Bd7 7.a3 Ba5 8.Bd3 Nc6 9.c3 0-0-0 10.Bf6 Qf6 11.Bh7 Rh8 12.Qc2 Qg7 13.g3 Qh7 14.Qh7 Rh7 15.0-0 e5 16.d4 ed4 17.cd4 Bh3 18.Rc1 f5 19.Nbd2 Ne7 20.Ne5 f4 21.Ndf3 fe3 22.fe3 Nf5 23.Ng5 Rg7 24.Nh3 Ne3 25.Nf4 Bb6 26.Ra2 Bd4 27.Rac2 Be5 28.Ne6 Rd7 29.Re2 d4 30.Rd1 Nf5 31.Re5 d3 32.Rf5 d2 33.Rf2 b6 34.Nf4 Kb7 35.Rfd2 Rd2 36.Rd2 a5 37.h4 c6 38.h5 1–0. Hugi – Nautiluschess, ICS blitz, 2000.

5.Bh8 Qe7 6.Bf6 Qf6 7.c3 Bd6 8.Nf3 Nc6 9.d4 Bd7 10.Bb5 0-0-0 11.Bc6 Bc6 12.0-0 Rg8 13.Nbd2 e5 14.de5 Be5 15.Ne5 Qe5 16.Qc2 (better is 16.Nf3!? Qe4 17.h3 d4+-) 16...d4 17.ed4 (17.cd4 Rg2) 17...Rg2 18.Kh1 Qh2 0–1. bashful – PasadenaBiGuy, Live Game Caissa's Web, 2004.

5.Bh8 Kf8 6.Bf6 Qf6 7.c3 Bc3 (7...Bd6+-) 8.Nc3 Qc3 (8...c5+-) 9.dc3 Na6 10.Qh5 Ke7 11.Ba6 Bd7 12.Bb7 a5 13.Qg5 Kf8 14.Ba8 a4 15.Rb1 f6 (15...Be8 16.Rb8 h6 17.Qh6 Ke7 18.Qg5 f6 19.Qg7 Kd6 20.Re8 Ke5 21.Nf3 Ke4 22.Qh7 f5 23.Ke2 e5 24.Re5) 16.Rb8 (16.Qf6 Ke8 17.Rb8 Bc8 18.Bc6) 16...Ke7 17.Qg8 a3 (17...Kd6 18.f4 e5 19.f5 Bf5 20.Qf8 Ke6 21.Re8 Kd7 22.Qe7) 18.Qf8 1–0. bashful – Grits, Live Game Caissa's Web, 2004.

5.Bh8 Bf8 6.Qf3 Nc6 (6...Nbd7+-) 7.Bf6 Be7 1–0. Anden – twisted, Live Game Caissa's Web, 2004.

5.Bh8 Bf8 6.Bf6 Qf6 7.d4 Nc6 8.Qf3 Qg6 9.Bd3 f5 10.Ne2 Bd7 (10...Bd6 11.Bb5+-) 11.Nd2 (11.Nf4 Qg7+-) 11...Bd6 12.Nf4 (12.g3 Nb4+-) 12...Qg7 (12...Bf4 13.Qf4 Qg2 14.0-0-0+-) 13.c3 0-0-0 14.0-0 e5 15.de5 Ne5 16.Qd5 Bc6 (16...Nd3 17.Nd3 Qh6 18.Nf3+-) 17.Bf5 Kb8 18.Qb3 Nf3 (18...Ng4 19.Bg4 Qg4 20.Qe6+-) 19.Nf3 Bf3 20.g3 Bf4 21.ef4 Qh6 (21...h5 22.c4 Bc6 23.Rad1+-) 22.Rae1 Bc6 (22...Qf6 23.Bh7 Bd5 24.c4+-) 23.Re5 Qg7 24.Rd1 Rf8 25.Qb4 h5 (25...b6 26.Qc4 Qf6 27.g4+-) 26.Bd7! Bd7 27.Rd7! Qg8 (27...Qd7 28.Qe7 Double attack (28.Qf8 Deflection; 28.Qe7 Decoy; 28.Qf8 Overloading)) 28.Rc7! b6 (28...Kc7 29.Re7) 29.Qe4 Rf7 (29...Kc7 30.Re7 Kd8 31.Qb7 Qg3 32.fg3 Rf4 33.Qd7) 30.Qb7 1–0. Adlai – Mftojdaz, internet, 2019.

6.Bb5 Bd7 7.a3 Bd6 8.Bc6 (8.Nc3 a6 9.Bf1 Ne5+-) 8...Bc6 9.d4 Qe7 10.Bf6 Qf6 11.Nd2 0-0-0 12.Ngf3 Rg8 13.g3 h5 14.h4 Qg6 15.Ne5 (better 15.Qc1!? f6+-) 15...Be5 16.de5 d4 17.Rg1 de3 18.fe3 Ba4 (18...Qf5 19.Nc4 Bd5 20.Qd3 Bc4 21.Qc4 Qe5 22.Qd4 Qa5 23.Qd2 Qd2 24.Kd2+-) 19.Nb3 (19.e4 Rd8+-) 19...Qe4 (19...Rd8 20.Qe2 Qe4 21.Kf2+- (21.Qh5 Bb5 22.Qg5 Qf3 23.Qd8 Kd8 24.Rd1 Ke7=+)) 20.Qe2 (better 20.Qd4!? Qc6+-) 20...c6 (20...Qe5 21.Rd1 Rg3 22.Rg3 Qg3 23.Qf2+-) 21.0-0-0 Qe5 22.Rd4 (22.Kb1!? Bb3 23.cb3 f5+-) 22...Bb3 23.cb3 c5 24.Qc2?? (better 24.Rdd1 Qc3 25.Qc2 Qa1 26.Kd2 Qa3 27.Ke2+-) 24...Qe3-+ 25.Rd2 Qg1 26.Kb2 Rg3 27.Rf2 (27.Qh7 c4! 28.Qh8 Rg8-+) 27...b6 28.b4 f5 (28...Rg4!? 29.Ka2 c4 30.Qe2-+) 29.bc5 Kb7 30.cb6 ab6 (30...Kb6 31.Ka2 Rg4 32.Re2=) 31.a4? (31.Rd2 Rg7-+) 31...Qe1 (31...Rh3 32.a5 Qg3 33.a6 Ka7 34.Kb1 Rh1 35.Ka2-+) 32.Rd2 Qe5 33.Ka2 Qa5 (better 33...Rc3 34.Rd7 Kc6-+) 34.Rd7 Ka6 (34...Kb8 35.Qc7 Ka8 36.Qc8) 35.Qc8 1–0. GuestNWNG – GuestTTKF, freechess.org, 2017.

6.Bb5 Bd7 7.Bc6 Bc6 8.Qf3 (8.Nf3 Qe7+-) 8...Be7 (8...d4 9.Qh3+- (9.Qf6?! Bg2 10.Qd4 Qd4 11.Bd4 Bh1+-; 9.Bf6?! Bf3 10.Bd8 Bg2 11.Bc7 Bh1+-)) 9.Ne2 Kd7 (9...d4 10.Qh3 d3+-) 10.Nd4 (better is 10.Bf6 Bf6 11.d4+-) 10...Qh8 11.Nc6 Kc6 12.Nc3 (12.c4 Ne4 13.cd5 ed5+-) 12...Bb4 (better is 12...Ne4 13.Qf7 Qf6 14.Qf6 Bf6+/–) 13.e4?? (better is 13.0-0+-) 13...Ne4-/+ 14.Ne4?? (better is 14.a3 Bc3 15.dc3 Qc3 16.Qc3 Nc3 17.Rg1-/+) 14…Qa1-+ (15.Qd1 Qd1 16.Kd1 de4-+) 0–1. tromar (1705) – Epsi (1620), GameColony.com, 2002.

6.c3 Bd6 7.Qf3 Ne4 8.Qh5 e5 9.Nf3 Nf6 10.Qg5 Nd7 11.Qg8 Nf8 12.Ng5 Be6+-.

6.Bf6 Qf6 7.c3 Ba5 8.Bb5 Bd7 9.Nf3 a6 10.Ba4 b5 11.Bc2 b4 (11...e5 12.e4 (12.Bh7?! e4+-) 12...d4 13.Bb3+-) 12.Nd4 Nd4 13.ed4 e5 (13...bc3 14.dc3 c5 15.dc5 (< 15.Bh7 cd4 16.Qc2 Qe5 17.Kd1 Qg7+-) 15...Bc3 16.Nc3 Qc3 17.Kf1+-) 14.0-0 (14.Qh5 ed4 15.Qd5 Qe6 16.Qe6 Be6 17.cb4 Bb4 18.Bh7 Kd7+-) 14...ed4 15.Re1 (15.a3 bc3 16.dc3 Bb5 17.Re1 Kf8 18.Bh7 dc3 19.Qd5 Rd8 20.Qc5 Rd6+-) 15...Be6 (15...Kf8 16.Bh7 Bb6 17.Rf1+- (17.cb4?! d3 18.Qf3 Qa1+-)) 16.Ba4 (16.Bd3 Kf8 17.Qa4 Bb6 18.cb4 Kg7+-) 16...Ke7 (16...Kf8 17.Bc6 Rb8 18.cb4 Bb4 19.Qh5+-) 17.cb4 Bb4 18.Qb3 c5 (18...Bd6 19.Qd5 Rd8 20.Qe4+-) 19.Qd5 (19.a3!? d3 20.Nc3 Kf8 21.ab4 d4+-) 19...Rd8 (19...Rc8 20.Qb7 Kf8 21.a3+-) 20.Qb7 (better is 20.Qc6 d3 21.a3 Qa1 22.Qc7 Kf8 23.Qd8 Kg7 24.Qd3 Ba5+-) 20...Kf8 21.a3 Ba5 22.Qa6 Bc7 23.d3 Qf4 (23...c4+-) 24.Ra2 (better is 24.g3 Qd6 25.Qd6 Bd6 26.Nd2+-) 24...Qh2-/+ 25.Kf1 Qh1 26.Ke2 Qg2 27.Nd2?? (better is 27.Kd1 Ba2 28.Qh6 Kg8 29.Nd2-/+) 27...Bg4-+ (27...Ba2?! 28.Qh6 Qg7 29.Qh5 Qe5 30.Qe5 Be5 31.Rc1-/+) 28.Nf3 Qf3 (28...Bf3 29.Kd2 Qf2 30.Kc1 Bf4 31.Rd2 Qe1 32.Kb2 Qd2 33.Kb1 Bd5 34.Qc4 Rb8 35.Bb3 Bc4 36.dc4 Rb3 37.Ka1 Qb2) 29.Kf1 (29.Kd2 Qf2 30.Kc1 Bf4 31.Rd2 Qd2 32.Kb1 Rb8 33.Qb5 Qe1 34.Ka2 Be6 35.Bb3 Qd2 36.Kb1 Rb5 37.Ka1 Qc1 38.Ka2 Bb3) 29...Bh3 (29...Qh1) 30.Kg1 Qg2 0–1. kamera – taskotibor, GameColony.com, 2002.

6.Bf6 Qf6 7.c3 Bd6 8.a4 Bd7 9.Na3 (9.d4 0-0-0+-) 9...a6 10.Qg4 (10.Qb1 Qg6+-) 10...0-0-0 (10...Ne7 11.Qh5+-) 11.Nf3 (11.Qh5 h6+-) 11...e5 (11...h6 12.Nc2+-) 12.Qg5 Qh8 (12...Qe6 13.Qh5+-) 13.Qh6 (13.Qh5 Qg7+-) 13...Kb8 (13...Rg8 14.Qh5+-) 14.Nc2 (14.Ng5 Ba3 15.Ra3 f6+-) 14...Na5 (14...Rg8 15.Rb1 Rg6 16.Qh5+-) 15.Nb4 (15.Ng5 Rf8 16.Nb4 f6 17.Qh7 fg5 18.Qd7 Qh4+-) 15...Nb3 (15...Bf5 16.Nd5 Nb3 17.Ra2+-) 16.Rb1 Bb4 (16...Ba4 17.Nd5 Nc5 18.d4+-) 17.Rb3 Bd6 18.Ba6 Ka7 (18...Bc8 19.d4 f6 20.0-0+-) 19.Bb7 Rb8 (19...Ba4 20.Rb2 Rb8 21.Rb4+-) 20.Bd5 Ba4 (20...Rb3 21.Bb3 Qb8 22.Bd1+-) 21.Rb8 Qb8 (21...Kb8 22.0-0 Qf8 23.Rb1 Kc8 24.Qh7+-) 22.Qh7 Qb5 (22...Bb5 23.c4 Ba6 24.Bf7+-) 23.c4 Qb2 (23...Qd7 24.Qf7 Qf7 25.Bf7+-) 24.0-0 Bb4 25.Rb1 Qa3 26.Ne5 Kb6 27.Qh8 Bc2 (27...Ka7 28.Qa8 Kb6 29.Qb7 Kc5 30.Qc7 Bc6 31.Qc6) 28.Nd7 (28.Nd7 Ka7 29.Qa8) 1–0. Janek – bg, internet free game, 2017.

6.Bf6 Qf6 7.c3 Bd6 8.Qb3+-.

7.Bb5 Bd7 8.Qf3 Ne4 9.Qh5 h6 10.Nf3 Ng5 11.d4 a6 12.Bd3 Nf3 +-.

7.Bd3 e5 8.Bb5 Qd6 9.d4 ed4 10.ed4 Bg4 11.Ne2 0-0-0 12.f3 Bd7 +-.

7.d4 Ne4 8.Nf3 Bd6 9.Be5 Ne5 10.de5 Bc5 11.Bd3 Bd7 12.Qc2 Bc6 +-.

7.Qf3 Nd7 8.d4 Qg5 9.Qg3 Qf5 10.Nd2 Ne7 11.Ngf3 Ng6 12.Be5 Nde5 +-.

7.Nf3 e5 8.Bb5 Qd6 9.d4 ed4 10.Bc6 Qc6 11.Nd4 Qb6 12.Qb3 Be7 +-.

6.Bb2 Qh4 7.g3 Qg5 8.Nc3 (8.Nf3 Qf5+-) 8...Bc3 9.Bc3 e5 (9...Nc3 10.dc3 c6 11.c4+-) 10.Bg2 (10.Nf3 Nc3 11.dc3 Qf6 12.Qd5 Nd7+-) 10...Bf5 (10...Nc3 11.dc3 c6 12.Rb1+-) 11.Be5 c6 (11...Bg4 12.f4 Bd1 13.fg5+- (13.Rd1?! Qe7=; worse 13.Kd1 Qe7=+)) 12.Bf4 Qf6 13.Rb1 1–0. Dziedzic,Ferdynand (1915) – Pilecki,Jozef, Szachowe Mistrzostwa Polski Osob Niepelnosprawnych, 2009.

6.c3 Ba5 7.Nf3 (7.d3 Nc5+-) 7...Nc6 (7...f6 8.Nd4 Kf7 9.Bd3+-) 8.Bb5 (8.Ne5 Qh4 9.g3 Qd8+-) 8...Bd7 (8...Ke7 9.d3 Nd6 10.Bc6 Qh8 11.Nd4+-) 9.Bc6 Bc6 10.0-0 Qd6 11.Ne5 Qf8 12.Nc6 bc6 13.Be5 Qh6 14.f3 Nc5 15.Bf4 Qg6 16.Na3 Nd3 17.Qa4 Nf4 18.ef4 Bb6 19.d4 Kd7 20.Qc2 Qh6 21.f5 e5 22.Rad1 Qe3 23.Kh1 ed4 24.Rfe1 Qc3 25.Qc3 dc3 26.f6 Rb8 27.Re7 Kc8 28.Rf7 Bc5 29.Nc2 Rb2 30.Ne1 Ra2 31.h4 h6 32.Rc1 d4 33.Rh7 Rf2 34.Nd3 Ba3 35.Rh8 Kd7 36.Re1 Rd2 37.Ne5 Ke6 38.Nc4 Kf6 39.Na3 c2 40.Rh6 Kf5 41.Kh2 d3 42.Nc4 Rd1 43.Re5 (43...Kf4 44.Rf6) 1–0. tschulz – Juri, Pfingstturnier, 2004.

6.c3 Bd6 7.d3 Nf6 8.Nf3 +-.

6.c3 Be7 7.Qh5 Bf6 8.Qh7 Nc6 (8...Ke7 9.Bf6 Nf6 10.Qc2+-) 9.Qg8 Kd7 (9...Ke7 10.Bf6 Kf6 11.Qd8 Nd8 12.d3+-) 10.Qf7 Be7 11.Bd4 (11.Qh5 b6+-) 11...Qf8 (11...Nd6 12.Qh5+-) 12.Qf8 Bf8 13.Nf3 (13.Bb5 a6 14.Bc6 bc6+-) 13...Bd6 (13...Kd6 14.Na3+-) 14.d3 (14.Bb5 Ke7 15.Bc6 bc6+-) 14...Nc5 (14...Nf2 15.Kf2 e5 16.e4 ed4 17.cd4+-) 15.Bc5 Bc5 16.d4 (16.h4 e5+-) 16...Bb6 (16...Bd6 17.h4+-) 17.Bb5 a6 18.Ne5 (18.Bc6 bc6 19.Ne5 Ke7 20.Nc6 Kd6+-) 18...Kd6 (18...Ke7 19.Bc6 bc6 20.Nc6 Kf6 21.h4+-) 19.Bc6 bc6 20.0-0 (better 20.h4!? Bd7+-) 20...Bb7 (20...c5 21.Nd2+-) 21.c4 (21.Nd2 c5+-) 21...a5 (21...c5 22.dc5 Bc5 23.Nd3 dc4 24.Nc5 Kc5 25.Nd2+-) 22.c5 (22.Nc3 Ba6+-) 22...Bc5 23.Nd2 (23.Rc1 Bb6+-) 23...Bb4 (23...Ba7 24.Rfb1 Rb8 25.Nd3+-) 24.Nb3 (24.Ndf3 Ra6+-) 24...a4 25.Nc1 (25.a3 ab3 26.ab4 Ra1 27.Ra1 Ba6+-) 25...Ba3 (25...Ba6 26.Ncd3 Bd3 27.Nd3+-) 26.Rb1 Ba6 27.Rd1 Bc4 (27...c5 28.h4+-) 28.Nc4 dc4 29.Ne2 c5 (29...Ke7 30.Nc3+-) 30.dc5 Kc5 31.Nc3 Kc6 (31...Bb4 32.Ne4 Kb5 33.a3+-) 32.Ne4 (32.Rd4 Bd6+-) 32...Rh8 (32...e5 33.g4+-) 33.h3 (33.Rd4 c3 34.Rc4 Kd7 35.Rc3 Be7+-) 33...Rh4 (33...e5 34.Rd2+-) 34.f3 (34.Rd4 c3 35.Nc3 Rd4 36.ed4 Bd6+-) 34...Bc5 (34...e5 35.Rd2 Bc5 36.Kf2+-) 35.Kf2 Rh8 (35...Re4 36.fe4 Ba3 37.g4+-) 36.Rdc1 Kd5 (36...Bb6+-) 37.Rb5 Ke5 38.Rc5 1–0. GuestVHKD – GuestZFHW, freechess.org, 2018.

6.Qf3 Nc6 7.Bd3 Ne5 8.Be5 Qg5 9.Bf4 Qf6 10.Nh3 Qa1 11.0-0 Qa2 12.Ng5 Bd2 13.Nd2 Nd2 14.Qh5 Nf1 15.Qf7 Kd8 16.Bc7 1–0. guest931 – guest1931, ICS blitz, 2000.

6.Nf3 Ke7 7.Bb2 Qd6 8.c3 Ba5 9.Ba3 c5 10.d4 Qc7 (10...Nd7 11.Nfd2 Nc3 12.Nc3 Bc3 13.Rc1+-) 11.dc5 (better 11.Nfd2 b6+-) 11...Nc3 12.Nc3 (better 12.c6 Ke8 13.Nc3 Bc3 14.Nd2 Nc6 15.Rb1+-) 12...Bc3+- 13.Nd2 Ba1?? (better 13...Qa5 14.Rb1 Qa3+-) 14.Qa1 (14.c6 Kd8 15.Qa1 e5 16.cb7 Bb7+-) 14...Qa5 (14...Nc6 15.Bd3+-) 15.Qb2 Nc6 16.Be2 Bd7 17.0-0 (17.Qb7?! Rb8 18.Bb4 Qb4 19.Qb4 Nb4=) 17...Rb8 (17...Rg8 18.e4+-) 18.Nb3 Qb5 (18...Qd8+-) 19.Bb5 1–0. GuestDQLY – GuestGFLG, freechess.org, 2019.

6.Nf3 f6 7.Bb5 Bd7 8.Bd3 Nf2 9.Kf2 f5 10.Ne5 Qh4 11.g3 Qg5 12.h4 Qg8 13.Qh5 Ke7 14.Qg5 Qg5 15.hg5 Nc6 16.Bf6 Kf8 17.Nd7 Kf7 18.Rh7 Kg6 19.Rg7 Kh5 20.Nc3 Bf8 21.Rh1 Kg4 22.Be2 1–0. Nautiluschess – oellinas, ICS blitz, 2001.

6.Qh5 Qf6 7.Bf6 Nf6 8.Qg5 (8...Nbd7 9.Nf3+-; 8.Qe5!? Nbd7 9.Qc7 Ke7+-) 1–0. var – luthier, Live Game Caissa's Web, 2004.

6.Qh5 Nf6 7.Qh4 Be7 +-.

5.Bh8 c5 6.Nf3 Qe7 7.c3 Ba5 8.Qa4 Nc6 9.Bb5 Bd7 (9...Qc7 10.Qg4 Nge7 11.Qg7+-) 10.Bc6 Bc6 11.Qa5 b6 (11...f6 12.d4 Nh6 13.Bf6 Qf6 14.Qc5+-) 12.Qa6 Qb7 13.Qe2 c4 (13...f6 14.d4+-) 14.Nd4 Bd7 (14...h6 15.Qh5 Qd7 16.f4+-) 15.Qh5 Ke7 (15...h6 16.Be5+-) 16.Qh4 (16.Qh7!? Qb8+-) 16...f6 17.Qh7 Kd6 18.Qg6 (better is 18.f4+-) 18...f5 (18...Qc8 19.d3 Qe8 20.Qg3 e5 21.dc4 Qf7+-) 19.Qg3 (better is 19.Be5 Kc5 20.Na3+-) 19...e5 20.Be5 Kc5 21.Bd6 1–0. Trkn – guest4875, ICC, 2005.

5.Bh8 Nd7 6.Nf3 Qe7 7.a3 +-.

5.Bh8 e5 6.Nf3 Qh5 7.Ne5 Bf5 (7...Qd1 8.Kd1 f6+-) 8.Qh5 Nc6 9.Qf7 Kd8 10.Qd5 Bd6 (10...Ke7 11.Qf7 Kd6 12.Nc4 Kc5 13.Qf5 Ne5 14.Qe5 Kc6 15.Qe6 Bd6 16.Ne5 Kc5 17.Qc4 Kb6 18.Qb5) 11.Qg8 Ke7 12.Qf7 Kd8 13.Bf6 Kc8 14.Qe8 Nd8 15.Qd8 1–0. b4_player – opponent, internet, 2008.

5.Bh8 Nf6 6.Nf3 Qg6 7.Ne5 Qf5 (7...Qg5 8.f4 Qh4 9.g3+-) 8.f4 Nbd7 (8...h5 9.Bf6 Qf6 10.Qh5+-) 9.Bf6 (better 9.Bd3!? Qh5 10.Qh5 Nh5+-) 9...Qf6 10.Qh5 Ne5 (10...Bd6 11.d4 c5 12.c3+-) 11.fe5 Qg7 (11...Qg6 12.Qg6 fg6 13.Nc3+-) 12.g3 (better 12.Bd3!? Qg2 13.Rf1 Bd7+-) 12...Bd7 13.Bd3 0-0-0 14.Qh7 (14.0-0 Be8 15.Nc3 Be7+-) 14...Qh7 (14...Qe5 15.c3 f5+-) 15.Bh7 Rh8 16.Bd3 Rh5 17.0-0 Re5 (17...Be8 18.Rf4 Ba5 19.Nc3+-) 18.Rf7 Rh5 (18...Kd8 19.Kf2+-) 19.Rg7 (better 19.Nc3+-) 19...Be8 (19...Rh8+-) 20.Rg8 Kd7 21.Rg7 (better 21.Re8 Rh2 22.Rb8+-) 21...Kd6?? (21...Kc8 22.c3 Bd6+-) 22.Bg6 (22.Bg6 Rg5 23.Be8 Rg7 24.Bh5+-) 1–0. GuestHVTY – GuestGWSS, freechess.org, 2019.

6.Nf3 Qg4 7.Be2 +-.

6.Nf3 Qg4 7.Rg1 +-.

6.Nf3 Qh5 7.c4 Kf7 8.g4! Qg4 9.Ne5! fe5 10.Qg4 dc4 11.Qg7 Ke8 12.Qg8 Kd7 13.Bc4 Kd6 14.Be5! Ke5 15.Qc8 Ke4 16.Qe6 Kf3 17.Bd5# 1–0. pierre – resident evil, internet, 2007.

6.Nf3 Qh6 7.c3 Be7 (7...Bd6 8.d4+-) 8.d4 Bd7 9.Nbd2 Bd6 (9...Qg6 10.Qb3 Bc6 11.Rb1+-) 10.Rb1 b6 11.Qc2 (11.e4 c5+-) 11...Nc6 12.Bd3 Nge7 13.e4 0-0-0 14.e5 Rh8 15.ed6 cd6 16.c4 dc4 17.Nc4 Kc7 18.a4 d5 19.Ne3 Kb7 20.0-0 Ng6 21.Qd2 Nh4 22.Be2 Rg8 23.Rfd1 Nf3 24.Bf3 Qg6 25.a5 Ne7 26.ab6 1–0. Van Esbroeck – Robbe, corr Belgium T2–065, 1995.

7.a3 Bd6 8.Nc3 +-.

7.Bd3 f5 8.g4 Ne7 9.gf5 ef5 10.Rg1 +-.

8.a3 Bc5 +-.

8.a3 Bd6 +-.

8.c3 Bd6 9.Qc2 +-.

8.e4 Nd7 +-.

9.Qc2 Nc6 10.a4 Nh6 11.Na3 a6 12.c4 Nb4 13.Qb1 Nd3 14.Qd3 dc4 15.Nc4 Qg8 16.0-0 Qh8 17.Nd4 e5 18.Ne2 Qg7 19.Ng3 Be6 20.Rac1 Rd8 21.Qb1 b6+/– 22.f4 Ng4 23.fe5+- Qh6 24.h3 Rd2? 25.hg4 Bc4 26.Nf5 Qg5 27.Rc4 Bc5 28.Rc5 bc5 29.Qb8 Kd7 30.e6 Ke6 31.Qc8 Kf7 32.Qc7 Kg8 33.Rb1 (33...Rg2 34.Kg2 Qg4 35.Ng3 Kh8 36.Qd8 Kg7 37.Rb7 Kh6 38.Qf6 Qg6 39.Qf8 Kg5 40.Qf4) 1–0. Gross,Wilhelm – Cosmol, tt Bundesbank–Dt.Bank, 1993.

9.Qc2 e5 10.Qa4 Nd7 11.Bc2 +-.

9.Qc2 e5 10.Bh7 e4 11.Be4 de4 12.Qe4 Nc6 +-.

9.Bc2 Nc6 10.d4 Qf8 11.Qd3 Bd7 12.Qh7 0-0-0 13.Bg7 Qf7 14.Bg6 (14...Qg6 15.Qg6+-) 1–0. Ihaveagirlfriend – JAY2PLAY, ChessWorld.net, 2004.

9.Bc2 Nh6 10.Ba4 c6 11.g4 +-.

9.e4 de4 10.Be4 Nh6 11.Qa4 Nd7 +-.

9.e4 Qg6 10.Rg1 Nh6 +-.

9.a3 Bf8 10.Nb5 +-.

9.a3 Bf8 10.Nf5 e4 11.Be4 de4 +-.

9.Be2 ed4 Bh5 Qh5 (10...Be6 11.Bf7 Bf7 12.Qg4+-) 1–0. guest665 – guest830, ICC, 1999.

9.Be2 Kd8 10.Bh5 Qf8 11.Nb3 Ne7 12.Qf3 Qh8+/– 13.Bf7 c6 14.a3 Bd6 15.Qg3 h6 16.Nd4 Qh7+= 17.Ne6 Kd7?? 18.Nf8+- (18...Kc7 19.Nh7+-) 1–0. 73DADDELDU37 – Henne111@, mySchach.de, 2005.

9.Be2 Ne7 10.c3 Bc5 11.Nb3 +-.

9.Be2 Ne7 10.c3 Qf8 11.Qa4 Kd8 12.Qb4 ed4 13.Bf6 Qf6 14.Qd4 Qf8 +-.

5.c3 Bd6 6.Bh8 e5 7.d4 +-.

5.c3 Qg5 6.Bh8 (6.cb4?! Qg7 7.Nc3 a5+=) 6...Nf6 (6...Bd6+-) 7.cb4 Qe5 (7...Nbd7 8.Nc3+-) 8.d4 Qf5 9.Bd3 Qg5 10.Nf3 Qh6 11.Bf6 Qf6 12.Qc2 Nc6 13.Bb5 e5 14.Ne5 Bf5 15.Qc5 0-0-0 16.Bc6 bc6 17.Qa7 c5 18.Qa8 1–0. marus2 – Zxzx, internet, 2001.

5.Bh8 Nd7 +-.

5.Bh8 Qe7 6.Nf3 +-.

5.Bh8 Nf6 6.Nf3 Qg4 (6...Qh6+-) 7.Bf6 Bd7 (7...Nd7 8.Bb2+-) 8.a3 (8.Be5 Ba5+-) 8...Ba5 (8...Bd6 9.Nc3+-) 9.Nc3 (9.Bd3 h6+-) 9...Nc6 (9...Qg6 10.Bd4+-) 10.h3 Qg6 11.Bh4 f6 12.Bd3 Qh6 13.0-0 0-0-0 14.Rb1 Rg8 15.Na4 e5 16.Kh2 Qg7 17.Rg1 e4 18.Nc5 ed3 19.cd3 Bb6 20.Nd7 Kd7 21.Qb3 Ne5 22.Qd5 Kc8 23.Ne5 fe5 24.Qe6 Kb8 25.Bg3 Ba5 26.Be5 Qg6 27.Qg6 hg6 28.Rb3 Bd2 29.Rgb1 b6 30.d4 Rf8 31.f4 Kc8 32.d5 Rf7 33.d6 cd6 34.Bd6 Rd7 35.Rd3 Ba5 36.Rc1 Kb7 37.e4 Rf7 38.g3 g5 39.f5 Rh7 40.g4 Rh8 41.f6 Rd8 42.f7 b5 43.f8Q Rf8 44.Bf8 Bc7 45.Bd6 Bd8 46.Bb4 a6 47.Rd8 Kb6 48.Rd6 Kb7 49.Ba5 b4 50.Rc7 Kb8 51.Rd8 1–0. lim2 – johndough, Caissa.com, 2004.

5.Bh8 Nc6 6.Qh5 Nf5 7.Qh7 Bd7 8.Qg8 (8.Nf3 Bf8+-) 8...Ke7 9.Qg5 f6 (9...Kf8 10.Bf6 Be7 11.Be7 Qe7+-) 10.Bf6 (10.Bf6 Kd6 11.Bd8 Rd8 12.c3+-) 1–0. GuestPDDT – GuestJMGB, freechess.org, 2018.

5.Bh8 Qe7 6.Bb2 (6.Qh5 Qf8 7.Be5 Bd6+-) 6...Nc6 (6...Nf5 7.Nf3+-) 7.a3 (7.Qh5 Qf8+-) 7...Bd6 8.Qh5 Qf8 9.Nf3 e5 (9...Bd7 10.Bd3+-) 10.h3 (10.Ne5 Ne5 11.Be5 Bf5 12.Bd6 Qd6+-) 10...Be6 (10...Bf5 11.Nc3 d4 12.Nd5 Bc2 13.ed4 ed4 14.Nd4 Nd4 15.Bd4+-) 11.Bb5 (11.Ne5 Ne5 12.Be5 Bf5+-) 11...0-0-0 (11...e4 12.Nd4 Qg7 13.Nc3+-) 12.Ne5 (12.Bc6!? bc6 13.Be5 Bf5+-) 12...Ne5 (12...Qg7 13.Nc6 Qb2 14.Nd8 (14.Qh6?! bc6 15.0-0 Qa1 16.Bc6 Qa2+-) 14...Qa1 15.0-0 (15.Qh6 Qb1 16.Ke2 Qb5 17.d3 Kd8-/+) 15...Kd8 16.Qh6+-) 13.Be5 Be5 14.Qe5 c6 (14...Qg8 15.Rh2+-) 15.Bd3 Qe7 16.0-0 (16.Qd4 c5 17.Qf4 Ng8 18.Bh7 Nf6+-) 16...f6 17.Qf4 Nf7 (17...Qg7 18.Kh2+-) 18.Bh7 Ng5 (18...Nd6 19.Bd3+-) 19.Bf5 Bf5 (19...Qd7 20.Be6 Qe6 21.d3+-) 20.Qf5 Kb8 21.d3 (21.Nc3 Rh8+-) 21...a5 (21...Qg7 22.Nd2+-) 22.Nd2 a4 (22...Qe6 23.Qf4 Kc8 24.Rfb1+-) 23.e4 (23.Qf4 Qe5 24.Qa4 Rg8+-) 23...b5 (23...Ne6 24.Nf3+-) 24.ed5 (better 24.Rfe1 d4+-) 24...c5 (24...Rd5 25.Qf4 Kc8 26.Rae1+-) 25.Rfe1 (25.Rab1 Qb7 26.Qf6 Nf7+-) 25...Qf7 (25...Qc7 26.Qf6 Rd5 27.Re7+-) 26.Rab1 Rd5 27.Rb5 Kc7 28.Qf4 Kc6 29.Reb1 Ne6 30.Rb6 (30.Qa4 Kd6 31.Rb7 Qb7 32.Rb7 Nc7 33.Nc4 Ke6 34.Rc7 Kf5 35.Nd6 Kg6 36.Qe8 Kh6 37.Qg8 Rd6 38.Rh7) 30...Kd7 31.Rb7 Nc7 32.Qc7 Ke6 33.Qf7 (33.Qf7 Ke5 34.Re7 Kf5 35.Qh5 Kf4 36.g3) 1–0. jaddwarrior (2040) – shankar3881, ChessWorld.net, 2015.

4.a3 Nd7 5.Nf3 h6 (5...Ngf6 6.Bb5=) 6.c4 (6.Bb5 a6 7.Bc6 Rb8+=) 6...c6 7.cd5 cd5 8.Be2 Bb7 9.0-0 Ngf6 10.Nc3 a6 11.Qc2 g5 white resigned 0–1. chessclub (2280) – beammeupscotty (2100), net–chess.com, 2012.

4.b5 Bb7 5.Nf3 h6 6.Nc3 (6.c4 Nf6=) 6...Nd7 (6...Nf6 7.Bd3=) 7.Be2 (7.Bd3 Ngf6=) 7...Ngf6 8.0-0 (8.Nd4 Bc5=) 8...Bd6 9.a4 e5 (9...0-0 10.a5=) 10.a5 ba5 11.Ra5 0-0 12.Qa1 Qb8 (12...Qe7 13.g3=) 13.Ba3 Ba3 (13...Qd8 14.h3+=) 14.Qa3+- Re8 Black prepares e4 (14...c5 15.bc6 Bc6 16.h3+-) 15.Rb1 Nb6 16.d4 e4 (16...Ng4 17.h3 ed4 18.Nd4+=) 17.Ne5 Nfd7 18.Nc6 Bc6 19.bc6 Nf6 20.Nb5 Qd8 (20...Re6!? 21.Qc5+- (worse 21.Ra7 Rc6 22.c3 Ra7 23.Na7 Re6+=)) 21.Ra7+- Ra7 22.Qa7 Re7 23.Qa6 Kh7? (better 23...Qa8 24.Nc7! Qc6 25.Rb6 Qc7+-) 24.Nc7! Rc7 (24...Qc7 25.Rb6 Discovered attack (25.Qb6 Remove defender); 24...Rc7 25.Rb6 Discovered attack (25.Qb6 Remove defender)) 25.Rb6 (25.Qb6?! Qd6 26.Bb5 Ng4+-) 25...Qd6 (25...Qc8 26.c4+-) 26.h3 g5 (26...Kg6 27.Bb5+-) 27.c4 dc4 (27...Qe6 28.c5 Kg6 29.Bb5+-) 28.Qc4 Kg6 (28...Qd5 29.Qd5 Nd5 30.Rb5+-) 29.Rb7 Ne8 30.d5 f5 (30...Qe5 31.Qc5+-) 31.Qd4 (better 31.g4 Re7 32.gf5 Kf5 33.Bg4 Kg6 34.Be6 Re6 35.c7 Nc7 36.Rc7+- (36.Qc7?! Qc7 37.Rc7 Re5+=)) 31...h5 (31...Nf6+-) 32.Bh5! Kh5 (32...Kh7 33.Be8 Qe7 34.Qb6 Kg8 35.Bg6 f4 36.Rc7 Qd8 37.Bh7 Kf8 38.Qb4 Qd6 39.Qd6 Ke8 40.Bg6) 33.Qh8 Kg6 34.Qe8 Kf6 35.Qb8 Rb7 (35...Qd5 36.Qc7 Qc5 37.Qf7 Ke5 38.Re7 Qe7 39.Qe7 Kd5 40.Qd7 Kc5 41.c7 Kb4 42.c8R g4 43.Qb7 Ka4 44.Ra8) 36.Qd6 (36.Qd6 Kf7 37.cb7 g4 38.b8Q Kg7 39.Qe8 gh3 40.Qdg6) 1–0. Janek – Fichas, internet, 2017.

4.c4 Bb4?? 5.Bg7 Nc6 6.Bh8 f6 (6...dc4 7.Bc4 Bb7 8.a3+-) 7.Nf3 (7.Qh5 Kf8+-) 7...Kf7 (7...d4 8.Qa4 Bd7 9.Qc2+-) 8.Nh4 (8.Qc2 Nce7 9.Qh7 Ke8 10.Qh5 Kf8 11.Bf6 Nf6 12.Qh6 Ke8 13.Qf6 Nf5 14.Qg6 Ke7+-) 8...Nge7 (8...Nh6 9.Qh5 Kg8 10.Qh6 Kh8 11.Bd3+-) 9.Qh5 Ng6 (9...Kg8 10.Bf6 Qf8 11.Qg5 Kf7+-) 10.Qh7 Kf8 11.Qg7 (11...Ke8 12.Qg6 Kd7 13.Bf6+-) 1–0. gtate (1910) – tibo (1805), net–chess.com, 2004.

4.c4 dc4 5.Bc4 Bb7 6.f3?? (6.Nf3 Nf6= (6...Bb4?? 7.Bg7 Nf6 8.Bh8+-)) 6...Nf6 (better is 6...Qh4 7.g3 Qc4-+) 7.b5 Be7 8.Ne2 a6 9.a4 a5 10.0-0 Nbd7 11.Nbc3 (11.d3=) 11...Rf8 (11...Ne5 12.Bb3=) 12.Ng3 (12.d4 Rc8+/–) 12...Nc5 (12...Ne5 13.Be2+=) 13.Nce2 h6 14.Qc2 Qd7? (better is 14...Rc8+=) 15.d4+- Na4 16.Ra4 Rb8 17.e4 Qd8 (17...c6 18.Qd3+-) 18.e5 Nd7 (18...Nd5 19.Nh5 g6 20.Bd5 Bd5 21.Nhf4+-) 19.Nc3 Bb4 20.Nce4 Be4 21.Ne4 f6 (21...Rc8 22.d5 Qe7 23.Rd1+-) 22.ef6 Nf6 23.Be6 Ne4 24.Qc6 (worse is 24.fe4 Rf1 25.Kf1 Qd6+-) 24...Ke7 25.Qe4 (worse is 25.fe4 Qd6 26.Qd6 cd6+- (26...Kd6?? 27.Bf5+-)) 25...Qd6 26.Bc4 (26.d5!? Kd8+-) 26...Kd8 27.Qh4 Rf6 (27...g5 28.Qe4+-) 28.d5 Qc5 29.Bd4 (29.Kh1 Qe7 30.Bf6 Qf6+-) 29...Qd6 (29...g5 A) worse is 30.Bc5 Bc5 (30...gh4?? 31.Bb4 ab4 32.Kf2+-) 31.Qf2 Bf2 32.Kf2 Kd7+-; B) 30.Qe4 Qd4 31.Qd4+-) 30.Bf6 Qf6 31.Qf6 (31.Qe4 Bd6+-) 31...gf6 32.Rd1 Kd7 33.Rd4 (33.g4 Kd6+-) 33...Kd6 (33...Bc5 34.Ba2 Re8+-) 34.Re4 Rf8 (34...Kc5 35.g4+-) 35.Re6 Kd7 36.Ra2 h5 37.Rae2 Bc5 38.Kh1 f5 39.Rh6 a4 40.Rh5 f4 41.Rh7 Kc8 42.Re6 (better is 42.d6 Bd6 43.Re4+-) 42...Kb7 (42...a3 43.g4 fg3 44.hg3+-) 43.Rc6 (better is 43.d6!? Bd6 44.Rd6 Kb8+-) 43...Re8 44.Re6 (better is 44.Rcc7 Kb8 45.Rb7 Kc8+-) 44...Rd8?? (44...Rf8 45.d6 Bd6 46.Rd6 Re8+-) 45.Rf7 Rg8 (45...Bd6 46.h4 Kc8 47.h5+-) 46.Rf4 (46.d6 Bd6 47.Rd6 Re8+-) 46...Ra8 (46...a3 47.Rf7 Kc8 48.g4+-) 47.g4 (better is 47.d6 Rd8 48.Bd5 Kc8 49.Ra4 Kd7+-) 47...a3 48.Re2 Ra4 (48...Rh8 49.Rfe4+-) 49.Rfe4 (49.d6!? Rc4 50.Rc4 Bd6+-) 49...Bd6 50.g5 Be5 (50...Ra8 51.Re8 Re8 52.Re8+-) 51.Bb3 (better is 51.Re5!? Rc4 52.g6 Ra4+-) 51...Re4 52.Re4 Bd6 (52...Bb2 53.g6 Kc8 54.Re7+-) 53.g6 (53.g6 a2 54.Ba2+-) 1–0. Valpa – Grunert, playchess.de, 2005.

4.Nf3= a6 5.Be2 Nd7 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+-) 6.0-0 Ngf6 (6...Bb4?? 7.Bg7 e5 8.Bh8+-) 7.a3 Bd6 8.Nd4 c5 9.bc5 bc5 10.Nf3 0-0 11.d3 Re8 12.Nbd2 Qc7 13.h3 Bb7 14.c4 e5 15.cd5 Nd5 16.e4 Nf4 17.Nc4 h6 18.Rb1 Re6 19.Nh4 Ne2 20.Qe2 Nf8? (better is 20...Be7 21.Nf5 Bg5+=) 21.Nf5+- Ng6 22.Bc1 (22.Nfd6!? Rd6 23.Nd6 Qd6 24.Be5 Ne5 25.Rb7 Nd3+-) 22...Be7 23.Be3 Bc8 24.Qd2 Rf6 25.Ne7 Ne7 26.Qc3 Ng6 27.Qa5 Rc6 28.Rb6 Rb6 29.Qb6 Qb6 30.Nb6 Rb8 31.Bc5 Nf4 32.Rd1 Be6 33.Nc4 Rc8 34.Bd6 Bc4 35.dc4 Rc4 36.Be5 Re4 37.Bd6 Rd4 38.Rd4 Ne2 39.Kf1 Nd4 40.g3 f5 41.h4 Kf7 42.Ke1 Ke6 43.Bc5 Kd5 44.Bf8 g5 (44...Ne6 45.Bb4=+) 45.Bh6 (better is 45.h5!?+/–) 45...gh4= 46.gh4 Nf3 47.Ke2 Nh4 48.Ke3 Ng2 49.Kf3 Ne1 50.Ke3 Nc2 51.Kf4 Ke6 52.Bf8 Nd4 53.Ke3 Kd5 54.Kd3 Nc6 55.Bg7 a5 56.Bf8 Ne5 57.Ke3 Kc4 58.Kf4?? (58.Bg7 Nd3=) 58...Nd3?? (better is 58...Ng6 59.Kf5 Nf8-+) 59.Kf5= Nf2 60.Kf4 Nd3 61.Ke3 a4 62.Kd2 Nf4 63.Kc2 ½–½. Olsen,Birger – Berntsen,Frode, NNM Tromsoe, 1999.

4.Nf3 Ba6 5.b5 Bb7 6.c4 (6.Nc3 a6=) 6...c5 7.Qc2 (7.Be2 Nf6=) 7...h6 (7...Nf6 8.cd5 Nd5 9.a3=) 8.Be2 Nf6 9.0-0 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 d4 (12...Bd6!?=) 13.ed4+- Bf3 14.Bf3 (worse 14.gf3 cd4 15.Qd3 Bc5=+) 14...cd4 15.d3 Bc5 16.Nd2 0-0 17.Nb3 Nbd7 18.Qe2 White fights for the Initiative 18...Qc7 (better 18...e5!?+=) 19.Nd4+- Bd4 (19...Qe5 20.Nb3 Qe2 21.Be2+-) 20.Bd4+- Nc5 (20...Qd6 21.Qe3+-) 21.Bf6 gf6 22.d4 Nd7 23.Bc6 Rd8 24.Qg4 Kf8 25.Qh4 Ke7 (25...Kg7 26.d5+-) 26.Qh6 Nf8 (26...Qd6 27.d5 Ne5 28.Ra1+-) 27.Qe3 Ng6 28.Qa3 White plans c5 28...Rd6 (28...Qd6 29.c5 Qd4 30.cb6 Qd6 31.Qd6 Kd6 32.Rd1 Ke7 33.Ra1+-) 29.c5 bc5 30.dc5 Rd4 31.Bf3 (31.Qa8 Qd8 32.b6 Ne5 33.Qa7 Kf8+-) 31...Ne5 32.b6 Qb8 (32...Qc8 33.Bb7! Nc4+- (33...Qb7?? 34.c6 Ke8 35.cb7+-)) 33.c6 Rd6 34.c7 Qb6 35.c8N Kd7 36.Nb6 Rb6 37.Rd1 Rd6 (37...Ke8 38.Qa8 Rb8 39.Qb8 Ke7 40.Qd8) 38.Qd6 Ke8 39.Qd8 1–0. GuestDGPD – GuestMXGM, freechess.org, 2020.

4.Nf3 Bb4?? 5.Bg7 Nf6 6.Bh8 +-.

4.Nf3 f5 5.c4+/- Bb7 (5...Nf6 6.cd5 ed5 7.Nc3+/-) 6.cd5+- ed5 7.Be2 (7.Bd3 Nf6+-) 7...Nf6 8.a3 (8.Qc2 Ne4 9.Nd4 Qd7+/-) 8...Bd6 (8...Be7 9.Qc2 0-0 10.Qf5+=) 9.Qc2 0-0 10.Qf5 Bc8 (10...Qd7 11.Qd7 Nbd7 12.Nc3+=) 11.Qc2+/- c5 (11...a5 12.b5+/-) 12.bc5 bc5 13.h3 Nc6 14.Nc3 Ne7 15.0-0 a6 (15...Rb8 16.e4 de4 17.Ng5+/-) 16.Nd1 (16.e4 Bc7+-) 16...Bb8 (16...Rb8 17.Bf6 Rf6 18.Rb1 Rb1 19.Qb1 Bh3 20.gh3 Rg6 21.Kh1=) 17.Be5 (17.d3!?+-) 17...Bf5 18.Qa2 Be5 19.Ne5 Qd6 20.f4 Ne4 (20...Ng6 21.Ng6 hg6 22.Nf2+=) 21.Bf3+/- Be6 (21...Ng5 22.Bg4+/- (22.fg5?! Qe5 23.Qb2 Qg3+=)) 22.Be4 de4 23.Qc2 Bd5? (better 23...Nc6!? 24.Nc4 Qd3 25.Qd3 ed3+-) 24.Nc3+- Ng6 (24...Rad8 25.Rf2+-) 25.Ng6 (25.Ne4 Be4 26.Qe4 Rfe8 27.Qc4 Qe6 28.Qe6 Re6+-) 25...hg6 26.Ne4 Qc6 Black intends c4 27.d3 (27.Ng5 Bg2 28.Rfc1 Rf5+-) 27...c4? (27...Rae8 28.Rfe1 Be4 29.de4 Re4 30.Rab1+/-) 28.Rac1 (28.Ng5 cd3 29.Qd3 Rad8+- (29...Bg2?? 30.Rfc1 Rad8 31.Qe2+-)) 28...Rac8? (better 28...Qe6!? 29.Qd2 Be4 30.de4 Qe4+/-) 29.Ng5+- cd3? (better 29...Qb6 30.d4 Rfe8+-) 30.Qd3 Qb7 (30...Bc4 31.Rc4! Qc4 32.Qg6 Rf6 33.Qh7 Kf8 34.Qh8 Qg8 35.Nh7 Kf7 36.Qg8 Kg8 37.Nf6 gf6+-) 31.Rc8 (better 31.Qg6 Rf6 32.Qh7 Kf8 33.Qh8 Bg8 34.Nh7 Kf7 35.Nf6 Kf6+-) 31...Rc8 32.Rf2 (better 32.Qg6 Qc6 33.Qh7 Kf8 34.Rd1+-) 32...Kh8 (32...Bf7+-) 33.Qg6 Kg8 34.h4 (better 34.Rd2 Rb8 35.Qh7 Kf8 36.Qf5 Kg8+-) 34...Qc6 35.Qc6 (better 35.Qh7 Kf8 36.Qf5 Kg8 37.Rd2+-) 35...Rc6 (35...Bc6 36.Rc2+-) 36.e4 (better 36.Rd2+-) 36...Bb3 (36...Bc4 37.Rb2 g6 38.a4+-) 37.Rb2 Rc3 38.e5 a5 39.a4 (better 39.f5!? Kf8+-) 39...g6 40.Rd2 Ba4 (40...Rc1 41.Kh2 Rd1 42.Rb2+-) 41.Rd8 Kg7 42.Ra8 Rc1 (42...Bc6 43.Ne6 Kh7 44.Ra5 Rc1 45.Kh2+-) 43.Kh2 Rc2 44.Ra7 Kg8 (44...Kf8 45.e6 (worse 45.Ra5 Bd7+-) 45...Ke8 46.Ne4+-) 45.Kh3 (45.Ne4!? Bb3 46.Ra5 Kf8+-) 45...Bc6 46.g3 a4 47.e6 (better 47.Kg4 Rc3 48.e6+-) 47...Kf8?? (47...Rb2+-) 48.Kg4 (48.Nh7 Ke8 49.Nf6 Kd8 50.e7 Kc8+-) 48...Rc3 (48...Re2+-) 49.e7 (better 49.Nh7 Ke8 50.Nf6 Kd8 51.e7 Kc8 52.e8Q Be8 53.Ne8+-) 49...Ke8+/- 50.Ne6 (better 50.Nh7 Kf7 51.f5 gf5 52.Kf5 Rc5 53.Kf4 Rc4 54.Ke5 Re4 55.Kf5 Re7 56.Ng5 Ke8 57.Ra6+/-) 50...Bd7= 51.Kg5 Be6 52.Ra4 Ke7 53.Ra7 Bd7 54.g4 Rg3 55.f5?? (better 55.Kg6 Rg4 56.Kh5 Rf4 57.Rb7=) 55...gf5-+ 56.Kf4 (56.Rd7 Kd7 57.Kf5-+) 56...Rg4 57.Ke5 (57.Kf3 Rh4 58.Ra6 Be6-+) 57...Rh4 58.Rb7 Re4 59.Kd5 Re1 60.Rd7 (60.Rb2-+) 60…Kd7 (60...Kd7 61.Kd4 f4 62.Kd3 f3 63.Kd4 f2 64.Kc3 f1Q 65.Kb3 Qd3 66.Kb4 Rb1 67.Kc5 Rb5) 0-1. carlos78 (2215) - medaone (2130), Rated Blitz game, lichess.org, 2015.

4.Nf3 h6 5.c4 Bb7 (5...Nf6 6.cd5 ed5 7.Ne5=) 6.Nc3 (6.cd5 Bd5 7.Nc3 Bb7+=) 6...dc4 7.Bc4 (7.a3 a6+=) 7...a6 (7...Bb4? 8.Qa4 Qd7 9.Qb4 Bf3 10.gf3+-) 8.a3 b5 9.Bb3 Nd7 10.d4 c6 (10...a5 11.d5 ab4 12.de6 fe6 13.Nb5 ba3 14.Qc2 (< 14.Na3 Bb4 15.Ke2 Ba6 16.Nc4 Ngf6=; 14.Ba3?! Ba3 15.Ra3 Ra3 16.Na3 Qf6=) 14...Bb4 15.Bc3 Bc3 16.Qc3+-) 11.0-0 g5 (11...a5 12.ba5 Ra5 13.Bc2+=) 12.Ne2 (12.d5 cd5 13.Nd5 f6+/–) 12...Bg7 (12...Ngf6 13.Nc1+/–) 13.Ng3 Ngf6 14.Rc1 (14.Nd2 a5+/–) 14...Rc8 15.Qd3 0-0 16.Bc2 c5 17.bc5 Bf3+/– 18.gf3 Rc6 19.Nh5 Re8 20.Ng7 Kg7 21.Kh1 Nf8 22.Rg1 Ng6 23.f4 Nh5?? 24.d5 (24...Kh7 25.dc6 Qd3 26.Bd3 gf4 27.Rcd1+-) 1–0. katchum (2280) – beammeupscotty (2210), net–chess.com, 2004.

4.f4 Nf6 5.Nf3 Bb4-/+ 6.c4 (better 6.Be2-/+) 6...dc4?? (6...0-0 7.Qc2-/+) 7.Bc4?? (7.Qa4 c6 8.Qb4 b5+-) 7...Ba6?? (better 7...0-0-/+) 8.Qa4+- Qd7 9.Qb4 Bc4 (9...Nc6 10.Qc3 Bc4 11.Qc4+-) 10.Qc4 0-0 (10...Qc6 11.Qe2+-) 11.Bf6 gf6 12.Nc3 a6 (12...c5 13.f5!+-) 13.0-0 (better 13.f5+-) 13...Nc6 (13...f5+-) 14.Ne4 Qe7 (14...Kh8 15.Qc3 Na7 16.Qf6 Kg8 17.f5+-) 15.Qc6 1-0. Nf3 (1940) – shahmater, Rated Classical game, lichess.org, 2013.

4.h3 Nf6 5.Bf6 Qf6 6.c3 Bb7 7.d4 Nc6 (7...Bd6 8.Nf3=+) 8.Bb5 (8.Nf3 Bd6=) 8...Be7 (8...a6 9.Bd3=+) 9.a4 (9.Qa4 Kd7=) 9...0-0 10.Qd3? (10.Bd3 a6=+) 10...Nd8 (10...Nb4 11.cb4 a6 12.Nf3 Bb4 13.Nbd2 ab5 14.Qb5-+) 11.Nf3 (better 11.a5!?=+) 11...a6-+ 12.Ne5 (better 12.Bd7 Bd6 13.a5-+) 12...Qh6?? (better 12...ab5 13.Nd7 Qg5 14.Nf8 Bf8 15.0-0 ba4 16.Qc2-+) 13.Bc6?? (better 13.Bd7=+) 13...Nc6-+ 14.Nc6 Bc6 15.Nd2 f5 16.c4 (16.0-0-+) 16...Bb4 17.c5 (17.0-0 Rf6 18.cd5 Bd5-+) 17...Rf6 (17...bc5!? 18.0-0-+) 18.0-0 (18.cb6 cb6 19.0-0 Rg6-+) 18...bc5 19.dc5 (19.Nf3 c4 20.Qc2 Bd6-+) 19...e5 Black prepares f4 (19...Rg6 20.Kh2-+) 20.Qb3 (20.Rfb1 a5 21.Nb3-+) 20...Bd2 21.a5 (21.Rad1 Ba5 22.Rd5 Kh8-+) 21...f4 (21...Rg6 22.Kh2 Qh4 23.g3-+) 22.ef4 (22.e4 Rd8 23.Ra2 Rg6-+) 22...Bf4 (22...Qf4 23.Qc2-+) 23.Rfe1 (23.Rad1 Rd8-+) 23...Kf8 24.Qf3 (24.Qd1 d4 25.Ra3 Rg6-+) 24...e4 (better 24...Bh2 25.Kh2 Rf3 26.gf3-+) 25.Qg4 (25.Qa3 Rg6 26.Kf1 d4-+) 25...d4 (better 25...Rg6!? 26.Qf5 Kg8 27.Rad1-+) 26.g3 (26.Qe2 Rg6 27.Kh1 e3 28.f3 Qh4 29.Rf1 Qg3 30.Qe3 Qg2) 26...Rg6 27.Qe2 Qh3 28.Qf1 Qh5 29.Kg2 Be5 (29...e3 30.Kg1 Qh1) 30.f4 e3 31.Qf3 Qf3 32.Kg1 Qg2 0-1. onam (2165) - vaingrecsky (2175), net-chess.com, 2022.

(--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6 4.Nf3 d5).

5.Be2 Nf6 6.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.Be2).

5.b5 Na5 6.Bd3 Bb7 7.0-0 Qd7 (better 7...Nf6!?+=) 8.Ne5+- Qd6? (better 8...Qd8+-) 9.Nf7! Kf7 10.Qh5 g6 11.Qf3 Nf6 (11...Ke8 12.Bh8 Nh6+-) 12.Qf6 Ke8 13.Qh8 Kd7 (13...Qe7 14.Na3+-) 14.Qh7 (better 14.Ba3 Qh2 15.Kh2 Bd6 16.Bd6 Rh8+-) 14...Be7 (14...Qe7 15.Qg6 Qe8+-) 15.Ba3 c5 16.bc6! Bc6 (16...Nc6 17.Bg6 Zwischenzug; 16...Bc6 17.Qe7 Double attack (17.Bg6 Zwischenzug); 16...Qc6 17.Qe7 Double attack (17.Be7 Pinning; 17.Be7 Deflection; 17.Bg6 Zwischenzug); 16...Kc6 17.Qe7 Deflection (17.Bg6 Zwischenzug)) 17.Bd6 Kd6 1–0. DEFFM – GuestXVHR, freechess.org, 2019.

5.Bb5 Bd7 6.Bc6 (6.a3 a5+=) 6...Bc6 7.0-0 f6 (7...Qd6 8.a3=) 8.a3 (8.Nd4 Qd7 9.Qh5 g6=) 8...Bd6 (8...e5 9.d4 Bb5 10.Re1=) 9.d4 (9.Nd4 Qd7+=) 9...Bb5 10.Re1 c5 11.Nh4 (11.e4 cb4 12.ed5 ba3 13.Ba3 Ba3 14.Na3 Qd5 15.Nb5 Qb5 16.Re6 Kf7+/–) 11...Ne7 (11...Qc7 12.Qh5 Kd8 13.dc5 Bh2 14.Kh1 bc5 15.Nc3=+) 12.Nd2 (12.dc5!? bc5 13.Nc3=+) 12...Qc7 13.f4 (13.dc5 Bh2 14.Kh1 bc5 15.Qh5 Kd8 16.bc5=+) 13...c4 (13...cb4!? 14.Ne4 de4 15.Qh5 Kd8 16.Qb5 Qc2-+) 14.c3 (14.Qh5 g6 15.Qe2 0-0=+) 14...a5 (14...0-0 15.Qg4 e5 16.Qe6 Kh8 17.e4=+) 15.Qg4 0-0-0 (better is 15...Kf7!?=+) 16.Qg7 f5 (16...Rdf8 17.ba5 ba5 18.Reb1+=) 17.Nhf3 (17.ba5 ba5 18.Rab1 Kd7+/–) 17...Rdg8 (17...a4 18.Qf6 Bd7 19.Ne5+=) 18.Qf7 Bd7 19.Ng5 (19.ba5 ba5 20.Ng5 Rf8+/–) 19...Rg6 (better is 19...Rf8 20.Qh5 a4+=) 20.h4?? (better is 20.ba5 ba5 21.Rab1+/– (21.Nh7?? Be8 22.Qf8 Rf8 23.Nf8 Rf6-+)) 20...Be8-+ 21.Ne6 Bf7 22.Nc7 Kc7 23.Nf3 h6 24.ba5 ba5 25.a4 Rhg8 26.Re2 Rg3 27.Kh2 Bh5 28.Rf2 Rg2 29.Rg2 Bf3 30.Rg8 Ng8 31.Ba3 Nf6 32.Bd6 Kd6 33.Rb1 Ne4 34.Rb6 Kc7 35.Rh6 Nc3 36.Rh7 Kb6 37.h5 Na4-+ 38.h6 c3 39.Rh8 c2 40.Rc8 1–0. Roell,Uwe – Pruess,Renate, Dortmund–ch, 1994.

5.Bb5 a6 6.Bc6 Ra7 =.

5.c4 Bb4?? 6.Bg7 Ngf6 7.Bh8 +-.

5.c4 Bb7 6.Be2 Ngf6 (6...Bb4?? 7.Bg7 dc4 8.Bc4+-) 7.a3 c5 8.Qa4 (8.bc5 Bc5 9.d4 Be7=) 8...Qc7 (8...dc4 9.bc5 b5 10.Qb5 Bf3 11.Bf3+=) 9.d3 (9.cd5 Nd5 10.bc5 bc5+=) 9...Bc6 10.Qb3 (10.b5 Bb7=) 10...Rb8 (10...dc4 11.dc4 cb4 12.ab4+=) 11.0-0 Bd6 12.h3 0-0 13.Nbd2 (13.b5 dc4 14.dc4 Bb7=) 13...Rfe8 14.Rfe1 e5 15.cd5 Bd5 16.Qc2 Rbc8 17.Rec1 Qb7 (17...cb4 18.Qc7 Bc7 19.ab4=) 18.bc5 (18.b5 a6 19.e4 Be6 20.ba6 Qa6=) 18...Bc5+= 19.Qa4 e4 (better is 19...a6!?=) 20.de4+/– Ne4 21.Ba6 Qc7 (better is 21...Qc6!? 22.Bb5 Qg6+/–) 22.Bc8+- Qc8 23.Qd1?? (23.Ne4 Be4 24.Rd1 Re7+-) 23...Qb7? (23...Nf2 24.Qf1 Ne4 25.Ne4 Re4-/+) 24.Ne1?? (better is 24.Ne4 Be4 25.Nd2+/–) 24...Nf2!-+ 25.Kf2 Be3 26.Kf1 Qa6 27.Qe2 b5?? (better is 27...Qe2 28.Ke2 Bd4 29.Kf1 Bb2-+) 28.Bd4! (28.Bd4 Bd4 29.Qe8 Nf8 30.Rab1 b4 31.Qe2 Qe2 32.Ke2 ba3 33.Rb4+-) 1–0. Franco Rincon,David (1695) – Torres Alvarez,Augusto, Cto Absoluto de Madrid, 2015.

5.Be2 h6 (5...Ngf6 6.b5=) 6.0-0 (6.Bb5 a6 7.Bc6 Ra7+=) 6...Bb7 (better is 6...a6=) 7.d4 (7.Re1 Bb4 8.Bg7 Rh7+=) 7...a6 (7...Bb4 8.Ba3 Ba3 9.Na3-/+) 8.Nbd2 (8.a3 Ngf6+=) 8...b5 (better is 8...Bb4 9.c4 Ngf6=+) 9.a4 c6 (better is 9...Bb4 10.ab5 ab5 11.Bb5 Ra1 12.Ba1 Qf6+=) 10.a5 (10.Bc3 a5 11.Qb1 Qc7 12.ba5 ba4 13.Ra4 Ba6 14.Ba6 Ra6+/–) 10...g5 (10...Bb4 11.Nb3=+) 11.h3 Bg7 12.Ne5 Ne5= 13.de5 Qc7 14.Nf3+= Ne7 15.Re1 Ng6 16.Bd3 Ne5=+ 17.e4?? Nf3-+ 18.Qf3 Bb2 19.Rab1 Bg7 (20.ed5 cd5-+; 19...Bc3 20.Red1-+) 0–1. gtate (2015) – beammeupscotty (2100), net–chess.com, 2005.

5.a3 Bd6 =.

5.b5 =.

5.Nf3?? Ng4 6.a3 -+.

5.Nf3?? Ng4 6.Be2 -+.

5.Nf3?? h6 6.Be2?? (6.Qh4 Be7=) 6...c5 (6...Ng4 7.a3-+) 7.a3?? (7.Qg3+=) 7...c4 (7...Ng4 8.0-0-+) 8.0-0?? (8.Qf4 Nc6=) 8...b5 (8...Ng4!? 9.d3-+) 9.Nc3?? (9.Qh4 a5=) 9...a6 (better is 9...Ng4 10.Nb5 Qb6 11.Nc3-+) 10.Ne5?? (10.Qh4 Bd6+=) 10...h5 (better is 10...Ng4 11.Ng4 Nc6-+) 11.Qg5 Be7 (11...Nbd7!?+=) 12.Qg7+/– Rf8 13.Nf3?? (better is 13.Qh6+-) 13...Rg8-+ 14.Qh6 Rg6?? (better is 14...Bf8 15.Nd5 Bh6 (15...Nd5?! 16.Qh7 Rg6 17.Ne5+=) 16.Nf6 Ke7 17.Ng8 Qg8-+) 15.Qh8= Bf8 (better is 15...Rg8 16.Qh6 Bf8 17.Nd5 Bh6 (17...Nd5?! 18.Qh7 Rg6 19.Ne5+=) 18.Nf6 Ke7 19.Ng8 Qg8-+) 16.Ne5?? (16.Na2!?+=) 16...Rg8?? (16...Rh6!? 17.Qh6 Bh6 18.f4-+) 17.Qg8?? (better is 17.Nf7 Rh8 18.Nd8=) 17...Ng8-+ 18.Bh5 Nh6 19.f4 Bd7 20.g4 (20.f5 Bg7 21.Nd7 Kd7 (worse is 21...Qd7 22.fe6 Qe6 23.Bf3 Bc3 24.Bc3-+; 21...Nd7?! 22.fe6 Nf6 23.ef7 Nf7 24.Bg6-/+) 22.fe6 fe6-+) 20...Nc6 21.g5 (21.Nd7 Qd7 (21...Kd7?! 22.g5-+) 22.f5 ef5-+) 21...Ne5 22.gh6 Qh4 23.fe5 Qh5 0–1. Kingog – FieldMarshall, Caissa.com, 2004.

5.Qf4 Bd6 6.Be5 Be5 7.Qe5 a5 =+.

5.Qg5 c6 = (5...Bb4? 6.Qg7 Rg8 7.Qf6+-).

4.a3 a6 5.bc5+= Bc5?? (better is 5...Qa5+= 6.Bc3 (6.Nf3 Nf6 7.Bf6 gf6 8.c4 dc4 9.Bc4 Rg8=; 6.c4 dc4 7.Bc4 Qc5 8.Be2 Nd7 9.d4 Qg5+=) 6...Qc5 7.Bb4 Qc7 8.Bf8 Kf8 9.d4 Nf6+=; 5...Nf6 6.d4 b6 7.cb6 Qb6 8.Ra2 Qa5 9.Bc3 Qa4+=; 5...Nc6 6.d4 (6.Nc3 Nf6 7.Na4 Nd7 8.Bc3 e5 9.d4 Rb8+=; 6.Nf3 Qa5 7.Nc3 Qc5 8.Rb1 Qa5 9.e4 Nf6=) 6...b6 7.cb6 Qb6 8.Bc1 Nf6 9.c4 dc4+=) 6.Bg7+- Ne7 7.Bh8 Ng6 8.Bg7 Qg5 9.Nf3 Qe7 10.d4 Ba7 (10...Bd6 11.c4+-) 11.c4 f6 12.Bh6 Bd7 (12...dc4 13.Bc4 b5 14.Bd3+-) 13.cd5 ed5 14.Nc3 Nc6 (14...Be6 15.Qb3 Qd7 16.Bd3+-) 15.Nd5 Qd6 16.Nc3 0-0-0 (16...Bb6 17.Qb3 Ba5 18.Rc1+-) 17.Bd3 Bg4 18.h3 Be6 19.0-0 f5 (19...Rd7 20.Rc1+-) 20.Qc2 f4 (20...Nge7 21.Bf4 Qd7 22.Ne5+-) 21.Bg6 hg6 22.Bf4 Qd7 23.Ne5 Qe8 24.Rac1 Bf5 (24...Ne5 25.Nb5 Nc4 26.Na7 Kd7 27.Qe4+-) 25.Qa4 Bd3 26.Nd3 Qe6 27.Ne5 Nd4 28.Nb5 Kb8 29.Nd7 Ka8 30.Nc7 1–0. pierre – dionjohnson, internet, 2008.

4.a3 c4 5.a4 Bd7 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+-) 6.Nf3 Nf6 (6...Bb4?? 7.Bg7 Ne7 8.Bh8+-) 7.b5 a6 8.ba6 ba6 (8...Na6 9.d3+=) 9.Be2 (9.d3 cd3 10.Bd3 Nc6=) 9...Nc6+= 10.0-0 Rb8 11.Bc3 Be7 (11...Ne4 12.Bd4+=) 12.d3= Na5 (12...cd3 13.Bd3 a5 14.Ne5=) 13.Nbd2 (13.Qe1 Nc6 14.dc4 Bc8+/–) 13...cd3+= 14.cd3 0-0 15.d4 Nc6 (15...Qc7!? 16.Rc1 Qb6=) 16.Ba6+/– Bd6 17.Bb5 Na7 18.Bd7 Qd7 19.a5 (19.Qe2 Rfc8 20.Rfc1 Qe7+/–) 19...Ra8 (19...Rfc8 20.Rc1=) 20.Qe1 (20.Qa4 Qe7+/–) 20...Rfc8 21.Nb1 Nc6 22.a6 (22.Ne5!? Qb7 23.f3=) 22...Ne4 23.h3 Nb8 24.Ne5 Be5 25.de5 Nc3 26.Nc3 Na6 27.Ne2 Nc5 28.Ra8 Ra8 29.Qc3 Ne4 30.Qd4 Ra4 31.Qb6 h6 32.Nf4 g5 33.Nh5 Ra2?? 34.Nf6 Nf6= 35.ef6 Kh7?? 36.Qb1+- Kg8 37.Qa2 Qb5 38.Qb1 Qc4 39.Rc1 Qe2 40.Rc8 1–0. joaquimbage – leongadol, playok.com, 2012.

4.a3 Nc6 5.c3 (5.bc5 Qa5=) 5...Nf6+= 6.Nf3 Be7 7.Be2 0-0 8.0-0 Bd7 9.d3 a6 10.Nbd2 b5 11.bc5 Bc5 12.c4 bc4 13.dc4 Rb8 14.Rb1 (14.Bf6 Qf6 15.cd5 ed5 16.Ba6 Bd6+=) 14...dc4 (14...Qe7 15.Qc1=) 15.Bc4 Qe7 16.Qe2 (16.Bf6 gf6 17.Ba6 Ba3+=) 16...a5 17.a4 ½–½. Diederich,Hauke – Reiss,Rebekka, GER–ch U13 Oberhof, 1998.

4.b5 Qb6 5.a4 a6 6.c4 Nf6 7.Nf3 Ne4 8.d3 Nf6 9.Be2 ab5 10.ab5 Ra1 11.Ba1 Qa5 12.Bc3 Qb6 13.0-0 Bd6 14.d4 cd4 (14...dc4 15.Na3 Nbd7 16.Nc4+/–) 15.Nd4 (15.Bd4!? Qd8 16.cd5 ed5 17.Nc3+/–) 15...0-0 16.Nd2 Nbd7 17.Qb3 Nc5 18.Qb2 Na4 19.Qb3 dc4?? (19...Nc3 20.Qc3 Qc7 21.f4=) 20.Bc4?? (better is 20.Qa4 Qc7 21.N4f3+-) 20...Nc3= 21.Qc3 Nd5 (21...e5 22.N4f3 e4 23.Ng5+=) 22.Qb2 Qc5 23.Bb3 Nb4 (23...Nf6 24.Nc4=) 24.Ne4+= Qh5?? (better is 24...Qb6+=) 25.Nd6+- Bd7 (25...Nd3 26.Qc2 Nc5 27.Nc8 Rc8 28.Ne6+-) 26.Nb7 Nd3 27.Qa2 Ne5 28.Nc6! Ng4?? 29.h3 Ne5 30.Ne5 Qe5 31.Rd1 Bb5 32.Bc4 Bc6 33.Na5 Ba8 34.Nb3 Qe4? 35.f3 Qe3?? 36.Kh1 Bf3+/– 37.Nd4?? (better is 37.Qd2 Qd2 38.Rd2+-) 37…Bd1-+ (37...Bd1 38.Nc6 Qc5-+) 0–1. OPA – GirlPower69, Live Game Caissa's Web, 2004.

4.b5 Bd7 5.Be2 Nf6 6.a4 Be7 7.Nf3 0-0 8.0-0 a6 9.c4 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Bc4 (12...Nd5 13.Be5=). pcmvr (2225) – alexp (2315), net–chess.com, 2006.

4.bc5 Qa5 5.Nf3 Nd7 6.Be2 Nc5 7.0-0 Ne7 8.c4 Qb6 9.Qc2 Bd7 10.Nc3 Bc6 11.a4 dc4 12.Bc4 Bf3 13.gf3 Nc6 14.Bb5 a6 15.a5 Qc7 16.Bc6 Qc6 17.Ne4 Qd5 18.Rac1 Ne4 19.Qa4 Kd8 20.fe4 Qg5 (20...Qd2 21.Rfd1 Qd6 22.Be5+-) 21.Kh1 Bd6?? 22.Qd4+- Ke7 23.e5 Bb8 24.Ba3 (24...Bd6 25.Qd6 Ke8 26.Rc7 Qd8 27.Re7 Kf8 28.Rd7 Ke8 29.Rd8 Rd8 30.Qe7) 1–0. Adam,Hanna – Bodenstein,Britta, Bayern chw GER, 2000.

4.bc5 Nc6 5.Bb5 Bd7 6.Nf3 f6 7.Bc6 bc6 8.d4 Rb8 9.Qc1 Qa5 10.Bc3 Qc7 11.0-0 Nh6 12.Qd2 Be7 13.Ba5 Qc8 14.Nc3 0-0 15.e4 Qa6 16.Ne2 (better 16.Bc7 Rb2 17.Qd3+-) 16...Rb5 17.Bc3 Rfb8 (better 17...de4!? 18.Ne1 Nf5=+) 18.ed5 ed5 19.Qe3 (19.Rfe1 R5b7+=) 19...Re8= 20.Qf4 Qc8 (20...Bc5 21.dc5 Re2 22.Bf6+=) 21.Ng3 Nf7 22.Rfe1 Be6 23.Re2 g5 (23...Bd8 24.Rae1+-) 24.Qd2 Bg4 25.Qd3 Qb7 (25...f5 26.Rae1 Rb7 27.h3+-) 26.Rae1 Rb1 27.Nf5 Bf8?? (better 27...Re1 28.Re1 Qd7 29.Ne7 Re7+-) 28.Re8+- Re1 29.Re1 Qd7 30.Ng3 Bg7 31.h3 Bh5 (31...Be6+-) 32.Nh5 1–0. GuestBFQC – GuestTTTP, freechess.org, 2017.

4.bc5 Qc7 5.d4 b6 6.Bb5 (6.Nc3!?+-) 6...Bd7+= 7.a4 (7.c4 bc5 8.Nf3 dc4 9.Bc4 cd4 10.Qd4 Nc6=) 7...Bb5 (7...bc5!? 8.Nf3 a6 9.Bd7 Nd7=+) 8.ab5+= bc5 9.Nf3 c4 10.0-0 Nd7 11.Nc3 Bd6 (11...Ngf6 12.Nd2+=) 12.Ne5 (12.Ra6 Ngf6+-) 12...Be5? (better 12...Ne5!? 13.de5 Be5=) 13.de5+- Nb6 (13...Ne7 14.e4 de4 15.Ne4+-) 14.Qg4 g6 15.Qf4 Qe7? (better 15...Ne7!?+-) 16.Ba3 Qd7 (16...Qb7 17.Rfd1+-) 17.Bd6 (17.Rfd1 Qc7+-) 17...Nc8 (better 17...Ne7+-) 18.Rfb1 Nd6 (18...Nb6 19.Rd1+-) 19.ed6 h6 (19...Rd8 20.Ra6 f6+-) 20.b6 a6 (20...f6 21.Nb5 g5+-) 21.b7 (21.Ra6 Rb8 22.Ra7 g5+-) 21...Rb8 22.Ra6 g5 (22...Nf6 23.Qf6 0-0+-) 23.Ra8 gf4 24.Rb8 Qd8 25.Rd8 Kd8 26.b8Q (26.b8Q Kd7 27.Qc7 Ke8 28.Rb8) 1–0. GuestGTLT – GuestBRHC, freechess.org, 2019.

4.Be2 cb4!? 5.Nf3 Nf6=+.

4.Be2 c4 5.a3= Bd7 6.Nf3 a6 7.0-0 Nf6 8.e4 (8.d3 b5+=) 8...Bc6 (better 8...Ne4!? 9.d3 cd3 10.Bd3 a5=+) 9.ed5+= Nd5 (9...Qd5 10.Be5+=) 10.Nd4 (10.Bc4 Nf6+-) 10...Bd7 (10...Nb6 11.Bh5 Qf6 12.Nc6 Qb2 13.Nc3 Nc6 14.Ra2 Qa2 15.Na2+-) 11.Bf3 (11.Bc4 Nb6 12.Bb3 Bd6+-) 11...b5 (better 11...Qg5+-) 12.Nb3?? (better 12.Bd5 ed5 13.Nc3+-) 12...cb3-+ 13.cb3 Ra7 (13...Bc6 14.Re1-+) 14.Bc1 (14.Bd4 Rb7 15.Bd5 ed5 16.Re1 Be6 17.Qg4-+) 14...Rc7 15.Bb2 Bc6 16.Nc3 Nc3 17.Bc6 Rc6 18.dc3 Rd6 19.Qf3 Be7 20.c4 0-0 21.Qg3 bc4?? (better 21...f6-+) 22.Qg7 1–0. anotherheaven (1615) – german11, lichess.org, 2015.

4.Qg4 e5 5.Qg3= d4? (5...f6 6.bc5 A) 6...Bc5?? 7.Qg7 Qb6 8.Bc1+- (8.Qh8?! Qb2 9.Qg8 Bf8+-); B) 6...Qa5=) 6.Qe5+- Ne7 7.bc5 (7.Qc5?! Nec6 8.Qb5 de3+=) 7...de3 8.Qe3 Nbc6 (better 8...Be6+-) 9.Qg3 (9.Bc4!? f6+-) 9...Bf5 (better 9...Nf5 10.Qc3 Qe7 11.Ne2 Qc5+=) 10.Bg7?? (better 10.Na3+-) 10...Rg8-/+ 11.Qe3 Bg7 12.Nc3? (12.c3 Be5-+) 12...Bc2 (better 12...Nb4 13.Rc1 Bc3 14.dc3 Nc2 15.Rc2 Bc2-+) 13.d3?? (better 13.Rc1 Bd4 14.Qf3-+) 13...Qa5 (13...Bc3 14.Qd2 Bd2 15.Kd2 Bd3 16.Bd3-+) 14.Nge2 (14.Rd1 Bc3 15.Rd2 Rg6-+) 14...Bc3 15.Nc3 (15.Nc3 Qc3 16.Ke2 Nd4 17.Qd4 Qd4 18.Kd2 Qf2 19.Be2 Bd3 20.Rae1 Be2 21.Re2 0-0-0 22.Kc2 Qe2 23.Kb3 Rd3 24.Kb4 Rg4 25.Ka5 Ra3). felixrbran - pericacho22, Rated Classical game, lichess.org, 2013.

4.Qg4 Nf6!? 5.Qf4 cb4-/+.

5.ab4 a6 6.Qf3 (6.b5 Nf6 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Nbd7=; 6.Nf3 Nf6 7.b5 Bd6 8.Bd3 Nbd7 9.Na3 e5=) 6...Nf6 7.Bf6 gf6 8.c3 Nc6 9.d4 e5 =.

5.ab4 Bb4?? 6.Nf3 Nf6 7.Nc3 0-0 8.Be2 Nc6 9.0-0 a5 10.Nb5 Qb6 (10...Bd7 A) 11.d4 Ne4 (11...Na7 12.Na7 Ra7 13.Ne5 b5 14.c3 Be7 15.Qd3 Ne4 16.Ba3 f6-/+; 11...Rc8 12.Ba3 Ba3 13.Na3 Ne4 14.c4 dc4 15.Bc4 Nd6 16.Qe2 Qf6-/+; 11...Ne7 12.c3 Bb5 13.Bb5 Bd6 14.Qb3 Qc7 15.c4 dc4 16.Bc4 Ned5+=) 12.c4 Ne7 13.cd5 Qb6 14.Na3 ed5 15.Bd3 Bg4 16.Nc4 dc4-+; B) 11.c3 Be7 12.d4 Na7 13.Na7 Ra7 14.Ba3 b5 15.Ne5 Ne4 16.Qd3 f6-/+; C) 11.Re1 b6 (11...Ne4 12.c3 Be7 13.d3 Nd6 14.Nd6 Bd6 15.Ba3 Ba3 16.Ra3 e5-/+) 12.c3 Be7 13.c4 dc4 14.Bc4 Na7 15.Qb3 Bb5 16.Bb5 Nb5-/+; D) 11.c4 dc4 (11...Na7 12.Na7 Ra7 13.Bd4 Ra8 14.d3 b5 15.Ne5 Be7 16.Qb1 b4+=) 12.Bc4 Rc8 13.d3 Qe7 14.Qe2 e5 15.Rfc1 Rfd8 16.Ng5 Bg4-/+; E) 11.h3+= Ne4 12.c3 Be7 13.Ba3 Ba3 14.Ra3 Qf6 15.d3 Ng5 16.Ng5 Qg5+=) 11.Bf6 (11.c4 Ne4+= (11...dc4 12.Bc4 Qc5 13.d3 Nd5 14.Qe2 Nb6 15.Nc7 Rb8 16.Bb5 Bd7-/+) 12.d4 Bd7 13.Ba3 Ba3 14.Na3 Qb2 15.Bd3 Nc3 16.Qe1 Rfc8-/+) 11...gf6 12.c3 Bd6?? (better is 12...Be7+= 13.Qa4 e5 14.Rfb1 Qd8 15.d4 Bf5 16.Rd1 e4=) 13.Nd6+- Qc7 (13...Qc5 14.Nc8 Rfc8 15.Qa4+-) 14.Nb5 Qb6 15.Qa4 (better is 15.Qc2 e5+-) 15...Bd7 (15...e5 16.Qh4 Ne7 17.Rfb1+-) 16.Qg4 Kh8 17.Qh4 Nd8 (17...Kg7 18.Bd3 Rg8+-) 18.Qf6 Kg8 19.Ra4 Bb5 20.Rg4 1–0. pierre – hebbin, internet, 2010.

5.ab4 Bb4?? 6.Nf3 Nf6 7.Nc3 0-0 8.Be2 Nc6 9.0-0 Ne7 (9...e5 10.Nb5 Re8 11.d4-/+) 10.d3 (10.Nb5 Ba5+=) 10...Ng6 11.e4 Bc3 12.Bc3 de4 13.de4 Qd1 14.Rad1 (14.Rfd1 Ne4 15.Bb4 b6 16.Bf8 Kf8=) 14...Ne4 15.Ba1? (better is 15.Bb4!?-/+) 15...b6-+ 16.Bb2 (16.Ne5 Ne5 17.Be5 Bb7-+) 16...Bb7 17.Ba3 (17.Ne5 Rfc8 18.c4 Ne5 19.Be5 f6-+) 17...Rfc8 (17...Nc3 18.Rfe1 Nf4 19.Bf1 Bf3 20.gf3 Nd1 21.Bf8 Kf8 22.Rd1-+) 18.Rd7 Bc6 19.Rd4 Nc3 20.Ba6 Re8 (20...Bf3 21.gf3 Rc7 22.Re1-+) 21.Rc4 (21.Bb2 Nb5 22.Rc4 Bf3 23.gf3 Nd6-+) 21...Ne2 22.Kh1 Bf3 23.gf3 Nef4 (23...Red8 24.Rc7 Nef4 25.Kg1-+) 24.Bb5 (24.Rd1 Red8 25.Bd6 e5-+) 24...Rec8 25.Rd4 (25.Rd1 h6-+) 25...Rc2 26.Bd3 (26.Bc1 Nd5-+) 26...Nd3 27.Rd3 h6 28.Rd7 a5 29.Rb7 Nf4 (29...Ne5 30.Kg2-+) 30.Rd1 (30.Rb6 a4-+) 30...Nh3 (30...Rf2 31.Rb6 Rf3 32.Bd6-+) 31.Rdd7 Rf8 (better is 31...Nf2 32.Kg1 Nh3 33.Kf1 Rf2 34.Ke1 Rf3-+) 32.Bf8= Nf2 (better is 32...Rc1!? 33.Kg2 Nf4 34.Kg3 Ne2 35.Kh4 Rc4 36.f4 Rf4 37.Kh3 Rf2 38.Rb6 Rf5=) 33.Kg2 (33.Kg2 Ne4 34.Kf1 Rf2 35.Ke1 Rf3 36.Rb6 Re3 37.Kd1+=). Nautiluschess – JohnnyV, internet, 2001.

5.ab4 Bb4?? 6.Bg7+- (6...Nf6 7.Bh8+-) 1–0. b4_player – opponent, gamecolony.com, 2007.

5.ab4 Nc6 6.b5+= Nce7 7.h4 (7.Bd4 b6+=) 7...Nf6 8.h5 h6 9.Nf3 Nf5 10.Nc3 Be7 11.Ne2 (11.Bd3 0-0=) 11...0-0=+ 12.Nf4 Ne4 13.g4 Nfd6 14.d3 Nc5 15.Qd2 Bf6 (15...Nb5 16.g5 hg5 17.h6 gh6 18.Rh6-/+) 16.Ne5 (16.Bf6 Qf6 17.d4 Nce4=) 16...Nb5 17.Rg1 (17.Qb4!? Nd7 18.Nf7 Rf7 19.Qb5=+) 17...Nd6 18.Qb4 Qc7 19.g5 Bg5 20.Rg5? (better 20.Nf3 a5 21.Qd2-/+) 20...hg5-+ 21.Nh3 f6 22.Ng6 a5 23.Qg4 e5 24.Qg2 d4! 25.Nf8 (25.ed4 Bh3 Combination) 25...Kf8 26.ed4 ed4 27.Bd4 Bh3 28.Qh3 Nb5 (28...Ne6 29.Qe6 Re8 30.Qe8 Ke8 31.c4-+) 29.Bb2? (29.Qg3 Qe7 30.Be3 Nd4=+) 29...a4 (better 29...Re8 30.Kd1 Qf4-+) 30.h6=+ gh6 (30...Qa5 31.Ke2 Kg8 32.Bg2 Nc3 33.Kf1=) 31.Qh6 (31.Bf6 Qa5 32.c3 Re8 33.Be2 Re2 34.Ke2+-) 31...Qg7=+ 32.Qh3 (32.Qf6 Qf6 33.Bf6 g4=+) 32...Re8 (better 32...a3!? 33.Kd2 g4-/+) 33.Kd1 a3 34.Ba3 Na3 35.Ra3 Qe7 36.Qe3 (better 36.Qh8!? Kf7 37.Qh7 Ke6 38.Qe7 Ke7 39.d4=) 36...Qd6 (36...Qe3 37.fe3 Re3-/+) 37.Qd2 (better 37.Qh3!? Qf4 38.f3-/+) 37...Ne4-+ 38.Qa5? (better 38.de4 Qa3 39.Qd4-+) 38...Nf2 39.Kc1 Qe7 (better 39...b6 40.Qa4 b5 41.Qa5-+) 40.Kb2 (40.Bg2 Qe3 41.Qd2 Qd4-/+) 40...Qe5 (40...Nd1 41.Kb3-+) 41.d4? (better 41.Qe5 Re5 42.Bg2-/+) 41...Qa5?? (better 41...Qd4 42.Ka2 b6-+) 42.Ra5-/+. FeegLood (2535) – toar4 (2180), time forfeit, lichess.org, 2015.

5.ab4 Nd7 6.Nf3 (6.b5 Ngf6 7.Nf3 Bd6 8.Ba3 Ba3 9.Na3 e5=; 6.Bb5 Ngf6 7.c3 Bd6 8.f4 0-0 9.Nf3 Qb6+=) 6...Ngf6 7.b5 Bd6 8.Ba3 Ba3 9.Ra3 e5 =.

5.ab4 Nf6 6.b5 (6.Ra4 Be7 7.Nf3 Nbd7 8.Bd4 0-0 9.Nc3 Nb6=; 6.Bc3 Bd6 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 Qe7+=) 6...Bd6 7.Nf3 0-0 8.Be2 Nbd7 9.Ba3 Ba3 =.

5.c4 ba3 6.cd5?? (better 6.Na3 Nc6 7.cd5 ed5 8.Nf3=+) 6...ab2-+ 7.de6 (7.Ra2 ed5 8.Rb2-+) 7...ba1Q 8.ef7 Kf7 9.Bc4 Be6 (9...Kf6 10.Nf3-+) 10.Be6 Ke6 11.Qg4 Kd6 (better 11...Kf7 12.Qc4 Ke8 13.Qb5 Qd7 14.Qh5 g6 15.Qd1-+) 12.Qf4 Qe5 (better 12...Kc6 13.Qe4 Qd5 14.Qc2 Kd7 15.Ne2 Qg2 16.Qf5 Ke8 17.Rg1-+) 13.Qb4 Ke6 (13...Kc7 14.Qc4 Qc5 15.Qc5 Bc5 16.Ne2-+) 14.Qg4 Kd6 15.Qb4 Kd5 (15...Kc7!? 16.Qc4 Qc5 17.Qc5 Bc5 18.Ne2-+) 16.Qb3 Kc5 (16...Kc6 17.Nc3-+) 17.Qa3 Kb6 18.Qb3 Qb5 19.Qe6 Qd6 (19...Qd6 20.Qd6 Bd6-+) 0–1. pat_cash87 – Downset, lichess.org, 2020.

5.c3 Nf6= 6.d3 Nbd7 7.Nf3 Bd6 8.Nbd2 0-0 9.Be2 b6 10.Qb3 Qe7 11.b5 Kh8 12.c4 Bb7 13.a4 f4 14.Nf1 (14.0-0 fe3 15.fe3 e5=) 14...e5 15.N3d2 (15.a5 ba5 16.Ra5 a6+=) 15...Qe6 (15...dc4 16.dc4 Bg2 17.Rg1 Bf1 18.Bf1-+) 16.f3 e4 17.de4 de4 18.0-0-0 (18.a5 Rae8 19.ab6 ef3 20.gf3 fe3 21.Qe3 ab6 22.Qe6 Re6-/+) 18...Rad8 (18...a6 19.g3 ef3 20.Nf3 fe3 21.Qe3-/+) 19.Kb1 h6 20.ef4 Bf4 21.g3 Be5 22.Rg1? (22.Ne3 Bb2 23.Kb2 Qe5 24.Kc1 Qh5-/+) 22...Bb2 (22...Bd4!? 23.Bd4 cd4 24.Ne4 Ne4 25.fe4-+) 23.Kb2-/+ Ne5 24.fe4 Be4 25.Ne4 Rd1 26.Qd1 Ne4 27.Ne3 Rf2 28.Kb3 Rh2 29.Qd8 Kh7 30.Bd3 Nd3 31.Qd3 Rd2 32.Qb1 Qe5 33.Nd5 g6?? (better is 33...Qd4 34.Rc1 g6-+) 34.Re1+= Qd4 (34...Rd5 35.cd5 Qg3 (35...Qd5 36.Ka3 Ng3 37.Re7 Kh8 38.Qg6 Qf3 39.Kb2 Qf2 40.Qc2 Qf6 41.Qc3 Qc3 42.Kc3+-) 36.Kb2 Nc3 37.Re7 Kg8-/+) 35.Re4= Rd3 36.Kc2 Rd2 37.Kb3 ½–½. Strebel – Thoene, Wallertheim, 1993.

5.bc5!? Nf6 6.d4 +=.

5.Bc3 A) 5...Nbd7 6.Nf3 (6.Qf3 e5 7.Bb5 d4 8.ed4 cd4 9.Bb2 Bd6+=; 6.bc5 Nc5 7.Nf3 Bd6 8.Be5 Be5 9.Ne5 Ncd7=) 6...Bd6 7.bc5 Nc5 8.Be5 Be5 9.Ne5 Ncd7=; B) 5...Ne4 6.Bb2 (6.bc5 Nc3 7.Nc3 Bc5 8.Bb5 Nc6 9.Nf3 0-0+=) 6...Qh4 7.Qe2 cb4 8.ab4 Qe7 9.b5 e5=; C) 5...cb4 6.Bb4 (6.ab4 Bd6 7.Na3 0-0 8.Nb5 Ne4 9.Bd3 Nc3+=) 6...Bb4 7.ab4 Qd6 8.b5 0-0 9.d4 Ne4=.

5.bc5 Bc5 6.Bb5 (6.Nf3 0-0 7.Be2 Nc6 8.0-0 Bd6 9.Nc3 e5=; 6.Be2 0-0 7.Nf3 Nc6 8.0-0 Bd6 9.Nc3 e5=) 6...Bd7 7.Be2 Nc6 8.Nf3 0-0 9.0-0 Bd6=.

5.g4 A) 5...cb4 6.ab4 Qe7 7.Nc3 h6 8.h3 a6 9.b5 e5=; B) 5...Nc6 6.g5 (6.b5 Na5 7.f4 a6 8.g5 Ne4 9.Nf3 Nc4+=) 6...Nd7 7.b5 Ne7 8.Nf3 Ng6 9.h4 h6=; C) 5...Nbd7 6.g5 (6.bc5 Nc5 7.Bd4 Ncd7 8.f4 Bc5 9.Nf3 Bd4+=) 6...Ne4 7.d3 Nd6 8.bc5 Nc5 9.Nf3 Bd7+=.

5.a4 Bd7 6.c4 dc4 7.Bc4 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Bc3 Qb6 11.Qa4 Nf6 12.Qa8 Qc7 13.b6 Qc8 14.Nf3 Bd6 (14...Nd5 15.Bd5 ed5 16.0-0=) 15.Qa1 (15.Na3 Ne4+=) 15...Qd8= 16.0-0 0-0 17.Na3 Bc6 18.Ne5 Bd5 19.Rb1 Nbd7 (19...Ne4 20.Bd5 ed5 21.Nf3 Nc3 22.dc3=) 20.Nd7+= Nd7 21.Bg7 Re8 22.Bd5 ed5 23.Bc3 Re6 24.h3 Rg6 25.f4 (25.Nc2!?=) 25...Qh4+= 26.Rf1 (better is 26.Nc2!? Qh3 27.Ne1=) 26...Qh3 27.Rf2 Qg3 (27...Qf5-/+) 28.Kf1? (better is 28.Nb5 Bf8 29.f5 Rb6 30.Rf3-/+) 28...Rh6 29.Ke2 (29.Kg1 d4 (29...Nb6?! 30.Qb1 Bf8 31.Rf3 Qh2 32.Kf2-+) 30.Bd4 cd4 31.Qd4 Qh4-+ (31...Ba3?! 32.Qd7 Qh4 33.Rf3-+)) 29...Qg4 30.Kd3 c4 31.Kc2 Qf5 32.Kb2 Nc5 (better is 32...Ba3 33.Qa3 Rb6 34.Bb4 Nc5-+) 33.Rf1 Nd3 34.Ka2 (34.Kc2 Nf2 35.Kc1-+) 34...Ba3 35.g4 Qc8 (35...Qg4 36.Rg1 Nc1 37.Qc1 Bc1 38.Rg4 Rg6 39.Rg5=) 36.Bd4 Bc5 37.Kb1 Rb6 38.Kc2 Bd4 (38...Ra6!? 39.Qa6 ba6 40.Bc5 Qc5 41.Rb1-+) 39.ed4 Rb2 (39...Rb2 40.Qb2 Nb2 41.Kb2 Qg4-+) 0–1. Norholm,Leif – Hansen,Berno, Supersyveren, 1997.

7.Ba1 Qa5 8.Bc3 Qb6 9.Bb2 c4=+ 10.Nc3 Bb4?? (better 10...Bd7=+) 11.Na4 (better 11.Nd5!? ed5 12.Bg7 Qb5 13.Bh8 Bf5+-) 11...Qb5 12.Qa1?? (better 12.Bg7 Qa4 13.Bh8+-) 12...Na6?? (better 12...f6-/+) 13.Bg7+- Bd7 (13...Qa5 14.Bh8 Bd2 15.Ke2+-) 14.Nb2 (14.Bh8?! Qa4 15.Qb2 Be7+-) 14...Qc5 (14...Nf6 15.Bf6 Rg8+-) 15.Bh8 f6 (15...Ne7 16.c3 Qa5 17.Qb1+-) 16.Na4 (16.c3 Ba3+-) 16...Ba4 (16...Qa5 17.c3 Bd6+-) 17.Qa4 b5 (17...Qc6 18.Qa1 e5+-) 18.Qa6 c3 (18...Kf7 19.Be2 Ne7 20.c3+-) 19.d4 Qe7 20.Bb5 (better 20.Qc8 Qd8 21.Bb5 Ke7 22.Qb7 Kd6+-) 20...Kf7 21.Nf3 (21.Be2 Nh6 22.Nh3 Qd8 23.Qb7 Qe7 24.Bh5 Kg8 25.Qc8 Qf8 26.Qf8 Kf8 27.Bf6 Ng8+-) 21...h5 (21...Qd8 22.e4! Nh6 23.Qb7 Be7 24.Bf6 Kf6 25.e5 Kg6 26.Bd3 Kg7 27.Ng5+-) 22.0-0 Kg6 (22...Qd8 23.Ra1 Ne7 24.Qa8+-) 23.Bd3 f5 24.Be5 (24.Bf5 Kh6 25.Rb1 Nf6+-) 24...h4 25.h3 (better 25.Bf5 Kh5 26.Be6 Nh6+-) 25...Nh6 26.Nh4! Kh5 (26...Qh4 27.Qe6 Double attack) 27.Nf3 (27.g3 Kg5 28.Qc8 Qe8 29.Qe8 Nf7 30.Qg8 Kh5 31.Qg6) 27...Nf7 28.Qc8 Ng5 29.Ng5 Qg5 (29...Kh6 30.Qh8 Kg5 31.h4 Kg6 32.Be2 Qh4 33.Qg7) 30.Qe6 (30.Be2 Qg4 31.Qh8 Kg6 32.Qg7 Kh5 33.Qh7 Kg5 34.f4 Qf4 35.ef4) 30...Qd8 31.Qf5 (31.g4 Kg5 32.Qf5 Kh6 33.Qg6) 31...Kh6 (31...Qg5 32.g4 Kh4 33.Qh7 Qh5 34.Qh5) 32.Qg6 1–0. AhmedSultanov (1640) – Mgilhn (1615), lichess.org, 2019.

7.Ba1 Qa5 8.Bc3 Qb6 9.Nf3 Qb5?? (better 9...Nd7=) 10.Bb5+- (10.Bb5 Bd7 11.Qc1+-) 1–0. GuestWLCX – GuestRPWR, freechess.org, 2018.

7.Ba1 Qa5 8.Bc3 Qb6 9.Nf3 Bd7 10.Be5 Bb5? (better 10...Qa7+-) 11.Bb5+- Qb5 12.Bb8 Nf6 13.Nc3 Qd7 (13...Qa6 14.Qe2 Qa1 15.Nd1+-) 14.0-0 (14.Qb1 Bd6 15.Bd6 Qd6 16.Qb7 0-0+-) 14...Be7 15.Be5 (15.Bf4 b5 16.Qe2 c4+-) 15...0-0 16.Qb1 (16.Qa1 b5+-) 16...Ne4 17.Qb6 Bd8 (17...f6 18.d3 Nf2 19.Bf4+-) 18.Qb5 (18.Qa7 Nc3 19.Bc3 Qb5+-) 18...Qe7 (18...Qb5 19.Nb5 f6 20.Bc7+-) 19.d3 Nc3 20.Bc3 b6 21.Ne5 Bc7 22.Nc6 Qd7 23.Ra1 Qe8 (23...f6+-) 24.Ra7 Bb8 (24...Bd6 25.Qb6 e5 26.h3+-) 25.Re7 Qc8 26.Qb6 Re8 (26...Bd6+-) 27.Re8 Qe8 28.Nb8 h6 29.Na6 (better 29.Nc6 c4+-) 29...Qa4 30.Qb2 (better 30.Nc5!? Qc2 31.Qb4 Qd1 32.Be1 h5+-) 30...Qa6 31.Bg7 Qa5 (31...d4 32.Be5 f6 33.Bf6+-) 32.g3 Qe1 (32...d4 33.Bh6 Qd8 34.Qb5+-) 33.Kg2 d4 (33...Qb4 34.Qb4 cb4 35.Bh6+-) 34.Bh6 Kh7 35.Bf8 Kg6 (35...Kg8 36.Bc5 e5 37.ed4 ed4 38.Qb8 Kh7 39.Bd4 f6 40.Bf6 Kg6 41.Qf8 Qc1 42.Qg7 Kf5 43.Qf7 Qg1 44.Kg1 Kg4 45.Qd5 Kh3 46.Qe6) 36.Qb7 de3 (36...Qf2 37.Kf2 de3 38.Ke3 c4 39.Qe4 f5 40.Qe6 Kg5 41.Qh6 Kg4 42.Qh4) 37.Qe4 f5 (37...Kf6 38.Qf4 Kg6 39.Qg4 Kf6 40.Qg7 Kf5 41.g4 Kf4 42.Bd6 e5 43.Be5) 38.Qe6 Kh5 (38...Kg5 39.Qh6 Kg4 40.Qg6) 39.Qf5 1–0. Anonymous – Anonymous, lichess.org, 2020.

7.Ba1 Bd7 8.c4 dc4 9.Bc4 Qa5 10.Nc3 Nf6 11.Nf3 Be7 12.0-0 0-0 13.Qb3 Bc8 (13...Be8 14.Bb2+-) 14.e4 Nbd7 (14...Qc7 15.e5 Nh5 16.Ne2+-) 15.Be6 Nb6 (15...Qd8 16.Bc4 Bd6 17.Rd1+-) 16.Bc8 Qa7?? (better 16...Rc8 17.e5 Ne8+-) 17.Bh3+- 1–0. Pierre – Calbanco, internet, 2019.

7.Ba1 Bd7 8.c4 dc4 9.Bc4 Ne7 10.Nf3 Nd5 11.0-0 Be7 (11...Nb6!? 12.d3 f6+=) 12.Bg7+/– Rg8 13.Be5 Bf6 14.Bd5 (better is 14.d4+-) 14...Bb5? (better is 14...ed5 15.Qe2 Bg4+/–) 15.Bf6+- (15.Bb7?! Be5 16.Ne5 Qc7+/–) 15...Qf6 16.Re1?? (better is 16.Bb7 Qg7 17.g3 Bf1 18.Qf1+-) 16...ed5+= 17.Qb3 (17.d4 Qg6 18.g3 c4+/–) 17...Bc6= 18.Qb6?? (18.Kh1 b5=) 18...Nd7 (18...Qf3 19.g3 d4-+) 19.Nc3?? (better is 19.Qc7+=) 19…Nb6 (19...Nb6 20.Kf1 Qg6-+) 0–1. baqua – Bezek, Live Game Caissa's Web, 2004.

5.Nf3 Nd7 6.d3 Ngf6 7.Nbd2 Be7 8.Be2 Bb7 9.0-0 0-0 10.Nb3 (10.c4 a6=) 10...Bd6 11.h3 e5 12.Nh2 (12.Nh4 Qc7 13.Nf5 Rfe8+=) 12...Qc7 13.g3 (13.Nf3 Rfd8-/+) 13...e4 (13...c4 14.dc4 dc4 15.Bc4 Qc4 16.Qd6-/+) 14.Kg2 (14.de4 Ne4 15.Bf3 Ne5-/+) 14...Rae8 (14...d4 15.de4 de3 16.fe3 Bg3 17.Nf3-+) 15.Ng4 Ng4 16.Bg4 f5 17.Bg7? (better is 17.Bh5 g6 18.Be2 ed3 19.Bf3-+) 17...Kg7-+ (17...fg4?! 18.Bf8 gh3 19.Kh3 Rf8 20.de4-+) 18.Bf5 (18.Bh5 Ra8-+) 18...Nf6 (better is 18...Rf5 19.Qg4 Kf6 20.de4 Re4-+) 19.de4 de4 20.Nd2 Qf7 21.Be4?? (21.c4-+) 21...Be4 (better is 21...Ne4!? 22.Ne4 Be4 23.Kg1-+) 22.Ne4 Ne4 (22...Re4?! 23.Qd6 Rc4 24.Qd3-/+) 23.Qg4 (23.f4 Ng3! 24.Qd6 Nf1 25.Rf1 Re3-+) 23...Qg6 (23...Kh8 24.Qe2 Be5 25.Rac1-+) 24.Qh4 (24.Rad1-+) 24...Be7 25.Qg4 Qg4 26.hg4 Rf6 (better is 26...Rd8 27.f4 Rd2 28.Kg1-+) 27.f3 Nc3 28.g5 (28.a4 Rd6 29.e4 Rd2 30.Rf2 Red8-+) 28...Rd6 (28...Re6 29.e4-+) 29.f4 Rd2 30.Kf3 (30.Rf2 Rf2 31.Kf2 c4-+) 30...Rf8 31.Kg4 Nb5 32.f5 Bd6 (32...Rc2!? 33.f6 Bf6 34.gf6 Rf6 35.Rf6 Kf6 36.Kf3-+) 33.f6 Kg6 34.Rh1 Rh8 (better is 34...Na3!? 35.Rh6 Kf7 36.Rh7 Ke6 37.c3-+) 35.Rh6 Kf7 36.g6 (36.Rf1 Kf8 (36...Rc2?! 37.g6 hg6 38.Rh8-/+) 37.Rfh1 Rg8-+) 36...Kf6 37.Rf1 Kg7 38.Rh7 (38.Rfh1 Rc2 39.Rh7 Rh7 40.gh7 Kh8-+) 38...Rh7 39.gh7 Kh7 40.Kf5 (40.a4 Na3-+) 40...Bg3 41.Rh1 Rh2 (41...Rh2 42.Rh2 Bh2-+) 0–1. Mansor,Tarek – Sommerhalter,Bernd, Baden–ch op U1600, 2009.

5.g3 Bb7 6.Bg2 Nf6 7.a4 a5 8.Nh3 h6 9.0-0 d4?? (better is 9...Bd6=) 10.Bb7+- Ra7 11.Bg2 e5 12.c4 Bd6 13.e4 (13.f4 Re7+-) 13...0-0 14.d3 Be7 15.Nd2 Nh7 16.Nf3 Nd7 17.Bc1 f5 (17...Re8 18.Nd2+-) 18.ef5 Rf5 19.g4 Rf8 20.Re1 Bf6 21.Bd2 Rf7 22.Qc1 g5 23.Kh1 Ndf8 (23...Bg7 24.Qd1+-) 24.Ne5 Be5 25.Re5 Ng6 26.Re6 Nh4 (26...Rf6 27.Re2+-) 27.Bd5 (27.Be4 Rf6 28.Ng5 Nf8 29.Rf6 Qf6+-) 27...Rad7 (27...Kg7+-) 28.Rh6 (better is 28.Bc6 Kg7 29.f4+-) 28...Rd5 29.Rh4 (29.cd5?? Qd5 30.f3 Qf3 31.Kg1 Qg2) 29...gh4 30.cd5 Qd5 31.Kg1 Qf3 32.Nf4?? (better is 32.Qf1+-) 32...Qg4 33.Kf1 Qf3 34.Ke1?? (better is 34.Qe1 Nf6 35.h3 Qh1 36.Ke2 Re7 37.Be3 Qe1 38.Re1 de3 39.fe3+-) 34...Re7-+ 35.Kf1 Qh1 0–1. tschulz – Jonas84, Schach Master, 2004.

5.a4 a6 6.d3 ab5 7.ab5 Ra1 8.Ba1 cd3 (8...Qa5 9.Nd2 cd3 10.Bd3 Nd7=) 9.cd3 (9.Bd3 Nf6=) 9...Bb4 (9...Qa5 10.Bc3 Qb5 11.Nf3=+) 10.Bc3= Qa5 (10...Bc3 11.Nc3 Qa5 12.Qd2=) 11.Qd2 (11.Qb3 Bc3 12.Qc3 b6+=) 11...Bc3 (11...Qb5 12.d4 Qb6 13.Bb4=+) 12.Nc3 (12.Qc3 b6+=) 12...Qa1 (12...Nf6 13.Be2=) 13.Nd1 Bd7 (13...Nf6 14.Qc3 Qc3 15.Nc3+=) 14.d4 Nf6 15.Nf3 (15.Bd3 0-0+=) 15...Ne4 (15...Qa4 16.Qb2=) 16.Qb4 b6 (16...Nf2 17.Kf2 Qd1 18.Qd6 Qc2 19.Be2+-) 17.Bd3+= Qa5 The isolani on b5 becomes a target 18.Qa5 ba5 19.Be4 (19.Ne5 f6 20.Nd7 Nd7 21.Be4 de4+=) 19...de4= 20.Ne5 Bb5 21.Nc3 Bd3 (21...f6 22.Nb5 fe5 23.Ke2=) 22.Kd2+= Nd7 (22...f6 23.Nd3 ed3 24.Rb1+=) 23.Ra1 (better 23.Nd3 ed3 24.Ra1+- (24.Kd3?! Ke7=)) 23...Ne5= 24.de5 0-0 25.Ra5 Rb8 (25...Rd8 26.Ke1=) 26.Ra2 (26.Ra4 Rb2 27.Ke1 h5+=) 26...g6 (26...f6 27.ef6 gf6 28.f3=) 27.f3 (27.Ra4 Rb2 28.Ke1 Kg7+=) 27...h5 28.fe4 Bc4 29.Ra4 Rb2 (29...Bf1!? 30.g3 Rb2 31.Ke1 Rc2=) 30.Kc1+= Bb3?? (better 30...Rg2 31.Rc4 Rh2 32.Rc8 Kg7+-) 31.Ra8+- Kg7 32.Kb2 Bd1 (32...Bc4+-) 33.Nd1 1–0. BeepBeepImAJeep (2605) – Grius (1965), lichess.org, 2017.

5.d3 Qa5 6.Nc3 Bb4 7.Nge2 cd3 8.Qd3 Nf6 9.a3 Ne4?? (better 9...Bd6=) 10.ab4+- Qa1 (10...Qb4 11.Ba3 Qa5+-) 11.Ba1 Nc3 1–0. GuestKDPH – GuestBLTF, freechess.org, 2017.

5.d3 Qa5 6.Nc3 cd3 7.cd3 Bb4 8.Qb3 Qb5 (8...Nf6 9.a3 Bd6 10.Nf3=) 9.Nf3 (9.a3 Bc3 10.Qc3 Ne7 11.Qg7 Rg8+=) 9...Bc3 (better 9...Bd7!?=) 10.Qc3+= (10.Bc3?! Qb3 11.ab3 Nf6=) 10...Nc6?? (better 10...Ne7 11.a4 Qb6+=) 11.Qg7+- d4 12.Bd4 Nd4 13.Qd4 (better 13.ed4 Qb4 14.Nd2+-) 13...f6 14.Be2 e5 15.Qc3 Ne7 (15...Qd5 16.d4 e4 17.Nd2+-) 16.0-0 (16.d4 Qc6 17.Qb2 Qe6+-) 16...0-0 (16...Rg8 17.Rfb1 Qd5 18.Kh1+-) 17.Rfb1 (17.Rab1 Qa6 18.Qc2 Be6+-) 17...Qc6 (17...Nd5 18.Qc2 Qc6 19.Qc6 bc6 20.Rb3+-) 18.Qb3 Kh8 19.d4 ed4 (19...e4 20.Nd2 f5 21.Rc1+-) 20.Nd4 Qe4 21.Bf3 Qg6 22.Ne6 (22.Bb7 Rb8 23.Be4 Qe4 24.Qb8 Rg8=+) 22...Rg8 23.Nf4 (23.Bb7 Rb8 24.Nf4 Qg7-/+) 23...Qg5 24.Ne6 (24.Bb7?! Rb8 25.Qa3 Rb7 26.Rb7 Bb7 27.Qe7 Qe5 28.Qe5 fe5+=) 24...Be6?? (24...Qg6 25.Rd1 Nc6+-) 25.Qe6+- Nc6 (25...Rae8 26.Rb7 Nc8 27.Qf7+-) 26.Rb7 Nd8 (26...Qe5 27.Qe5 Ne5 28.Be4+-) 27.Rh7! Kh7 28.Qe4 f5 29.Qa8 Qg7 (29...Rg7 30.Rc1+-) 30.Rd1 Ne6 31.Qd5 (31.Qc6 Qe5+-) 31...Ng5 (31...Qg6 32.Qe5 Ng5 33.Rd7 Rg7 34.Rg7 Qg7 35.Qf5 Kh8 36.Be2+-) 32.Qf5 Kh8 33.h4 Nf3 34.Qf3 Rf8 35.Qh5 Kg8 (35...Qh7 36.Qh7 Kh7 37.Rd7 Kg6 38.Ra7 Rh8+-) 36.g4 (36.g4 Qf6 37.f4+-) 1–0. retiponziani (1780) – johnwebb (1945), ChessWorld.net, 2012.

5.d3 cd3 6.Bd3 Nf6 7.Nf3 Qa5 8.Bc3 Qb6 9.0-0 Bd6 10.a4 Qc7 11.h3 (better is 11.Bf6!? gf6 12.a5+=) 11...e5+= 12.Nfd2 e4 13.Be2 Bh3?? (better is 13...Nbd7=) 14.gh3+- Bh2 15.Kh1 Be5 16.Rg1?? (better is 16.Ra3+-) 16...Bc3= 17.Nc3 g6?? (better is 17...Qc3 18.Rg7 h5=) 18.f4?? (18.Ndb1 Qe5+-) 18...Qd7?? (better is 18...Qc3 19.Nf1 Nbd7-+) 19.Kh2 b6 (19...Qc7 20.Nd5! Nd5 21.Ne4 Nf4 22.ef4 Qf4 23.Kh1+-) 20.Bg4 (better is 20.Nb3 0-0 21.a5 ba5 22.Rg5+-) 20...Qd6?? (20...Qc7 21.Ra3 a6+-) 21.Ne2 (better is 21.Nde4 Ne4 22.Ne4+-) 21...h5+/– 22.Bh5?? (better is 22.Bc8 Qc7 23.Ba6+/–) 22...Rh5+= (worse is 22...gh5 23.c4 Nbd7 24.Rg5+=) 23.Ng3 Rh8 24.c4?? (better is 24.Nde4 Ne4 25.Ne4+/–) 24...Qd7-+ 25.f5 g5?? (better is 25...gf5 26.Kg2 f4 27.ef4 Qh3 28.Kf2 Ng4 29.Ke1 Qh2 30.Qg4 Qg1 31.Ndf1 Nd7 32.cd5 Qd4-+) 26.cd5= Qd5?? (better is 26...Rh4=) 27.Qb3?? (better is 27.Nde4 Nbd7 28.Ng5+/–) 27...Qd2 (27...Ng4! 28.Kh1 Rh3 29.Kg2 Rh2 30.Kf1 Rf2 31.Ke1 Qd2) 28.Rg2-+ Qd6 29.Rd1 Qe5 30.Qb4 (30.Rgd2 Nbd7 31.Kg2 Nc5-+) 30...g4 31.Kg1 (31.Qd4 Nbd7-+) 31...gh3 32.Rdd2 (32.Qb2 Nbd7 33.Qe5 Ne5 34.Re2-+) 32...hg2 33.Rg2 (33.Qd4 Qc7 34.Rg2 Qe7-+) 33...Ng4 (better is 33...Qa1 34.Kf2 Ng4 35.Ke2 Qa2 36.Qd2 Qa4-+) 34.Qb3 (34.Qe4 Qe4 35.Ne4 Ne3-+) 34...Nd7 (34...Qa1 35.Qb1 Qb1 36.Nf1 Rh1 37.Kh1 Qf1 38.Rg1 Qh3) 35.Qd3 (35.Qb2 Rc8 36.Nf1 Rg8-+) 35...Rc8 (better is 35...ed3 36.Nf1 Ne3 37.Kf2 Qf4 38.Ke1 Ng2 39.Kd1 Qa4 40.Kd2 Qc2) 36.Qd4 Rc1 37.Nf1 -+. ATUK – MEK, Live Game Caissa's Web, 2005.

5.Bb5 Bd7?? (better 5...Kf8=) 6.Bd7+- Qd7?? (6...Kd7 7.Bg7 Nf6 8.Bh8 Qh8+-) 7.Nf3 (7.Bg7 Nc6+-) 7...Qb5?? (better 7...f6=) 8.Nc3 (better 8.Bg7 Qd7 9.Bh8+-) 8...Qb2-+ 9.Rb1 Qa3 10.Rb3? (better 10.Rb7 Qa6 11.Qb1-+) 10...Qa6 11.Na4 (11.Qe2-+) 11...Qa4 12.0-0 (12.Rb7 Qa2 13.0-0 Qa6-+) 12...Nf6 (12...b6 13.Rb2-+) 13.d4 (13.Rb7 Bb6 14.Ne5 0-0-+) 13...Bd6 14.c3 (14.Rb7 Qa2 15.Qd3 Nc6-+) 14...Nc6 15.Rb7 Qa6 (15...Qa2!? 16.Ng5 0-0 17.Qd3-+) 16.Qb3 0-0 17.Rb1 (17.Rb5 Rfb8 18.a4 Na5-+) 17...Rab8 18.Rb8 Rb8 19.Qb8 (19.Qd1-+) 19...Bb8 20.Rb8 Nb8 21.Ne5 Qa2 22.g3 Qb1 (22...Ne4 23.Nd3 Qb1 24.Kg2 Qd3 25.c4 Qe2 26.cd5 Qf2 27.Kh3 Qf1 28.Kg4 f5 29.Kh4 g5 30.Kh5 Qh3) 23.Kg2 Ne4 24.Kf3 Nc6! 25.Kg4 (25.Nc6 Qd1 Double attack) 25...Ne5 26.de5 f5 (26...Qd1 27.f3 h5 28.Kh4 Qf3 29.Kh3 Nf2 30.Kh4 Qg4) 27.Kf4 (27.ef6 h5! 28.Kh4 g5 29.Kh5 Nf6 30.Kh6 Qh7 31.Kg5 Qf5 32.Kh6 Ng4) 27...Qf1 28.f3 (28.c4 Qf2) 28...Nd2 (28...g5) 29.e4 (29.h3 h6 30.c4 Qf3) 29...Qf3 30.Kg5 Qg4 0–1. Petak_Ranjau (1665) – Agiant (1685), lichess.org, 2020.

5.Bg7 f6 6.Bh8 Qe7 7.Bd3 Nc6 (7...Qf7 8.Nc3+-) 8.Qh5 Kd7 (8...Qf7 9.Qh7 Nge7 10.Bg7+-) 9.Bh7 (better 9.Qh7 Qh7 10.Bh7 Ke7+-) 9...d4 (9...Qf8+-) 10.Bg8 de3 11.fe3 Ne5 (11...b6 12.Nc3 Nb4 13.Qf3+-) 12.Ne2 (12.d4 Qd8 13.Qh7 Kc6 14.dc5 Bd7 15.Qe4 Kc7+-) 12...b5 13.Rf1 Bb7 14.Bf6 Qd6 15.Be5 Qd5 16.Nf4 Qg2 17.Qh7 Be7 18.Be6 Kd8 (18...Kc6 19.Qe7 Qg3 20.hg3 b4 21.Bc4 Re8 22.Qc7) 19.Qh8 Bf8 (19...Qg8 20.Qg8 Bf8 21.Qf8) 20.Qf8 1–0. DEFFM – domkrat, freechess.org, 2018.

5.Bg7 Qg5 6.Bh8 Nh6 7.Nf3 Qf5 (7...Qg8 8.Bb2+-) 8.Bd3 Qg4 9.0-0 Nc6 10.Ne5 (10.Nc3!? Qg8 11.Bd4 Bd4 12.ed4 Qg7+-) 10...Ne5 11.Be5 Qg8 (11...Qd1 12.Rd1 Ng4 13.Bg3+-) 12.Qh5 Nf5 13.Bf5 ef5 14.f4 (14.Nc3 Be6+-) 14...Be6 (14...Qg6 15.Qf3+-) 15.Bf6 (15.Nc3 a6+-) 15...Qg6 16.Qh4 Kd7 (16...h5 17.Nc3+-) 17.Rf3 Rg8 (17...Qg4 18.Qh7 Rg8+-) 18.Rg3 1–0. GuestXGMG – GuestPHGR, freechess.org, 2019.

5.Ba3 Nc6 6.Nf3 Qa5 7.c3 Bc5 8.Bc5 Qc5 9.d4 Qa5 10.Bd3 0-0 11.h3 Ne4 Exerts pressure on the backward pawn 12.Be4 de4 13.Nfd2 f5 14.Nc4 Qd5 15.Nbd2 b5 16.Ne5 (better is 16.Na3!?+=) 16...Ne5-/+ 17.de5 Qe5 18.Rc1 Ba6 19.0-0 b4! 20.Re1 (20.cb4 Qb2 Double attack (20...Bf1 Discovered attack; 20...Qb2 Decoy)) 20...bc3-+ 21.Nf1? (better is 21.Nb1!?-+) 21...Bd3 22.Ng3 Rac8 23.Qa4 a5 24.f3 (24.Ne2-+) 24...Qg3 25.fe4 fe4 (25...Be4 26.Re2 Rfd8 27.Qa5 Bg2 28.Rg2 Qe3 29.Kh2 Qf4 30.Kh1 Qc1 31.Rg1 Qe3 32.Qd8 Rd8 33.Re1 Qe1 34.Kg2 Rd2 35.Kf3 Qf2) 26.Qa5 (26.Kh1 Rf2 27.Rg1-+) 26...Rf2 (26...Rf2 27.Qg5 Rg2 28.Kh1 Qh3) 0–1. pittol – tostaky57, gameknot.com, 2015.

5.Bb5 Nc6 6.d4 Be7 (6...Bd7 7.Nf3 b6 8.c4 bc5 9.Nc3 cd4 10.Nd4 Nd4 11.Qd4 Bb5 12.cb5=+) 7.Nf3+= a6 8.Ba4 0-0 (8...Bd7 9.c4+-) 9.0-0 b5 (9...Qa5 10.c4+-) 10.Bb3+- Rb8 (10...a5 11.a4 b4 12.c4+-) 11.a3 (11.Nbd2 Qc7+-) 11...a5 12.Nbd2 a4 13.Ba2 Qc7 14.Bb1 Rd8 15.c3 e5 16.e4 de4 17.Ne4 (worse 17.Be4 Ne4 18.Ne4 f5=+) 17...Nd5 (17...g6 18.Re1+-) 18.Ba2 h6 19.Qc2 (19.Re1 Be6+-) 19...ed4 20.cd4 b4 (20...Bg4 21.Ned2+-) 21.Qa4 Bg4 22.Bd5 (22.Rfd1!?+-) 22...Rd5 23.ab4 Bf3 24.gf3 Rb4 d4 draws heavy fire 25.Qa3 Rb8 26.Rab1 (26.Qa2 Qd7+=) 26...Rbd8 27.Rfd1 Qd7 28.Qa6 (28.Kh1 Nd4 29.Qe3 Ne6 30.Rd5 Qd5=) 28...Ne5 29.Qe2 Ng6 30.Nd2 (better 30.Kh1 Qh3 31.Qf1 Qf3 32.Qg2 Qg2 33.Kg2=) 30...Rh5-/+ 31.Qf1? (better 31.f4 Qh3 32.Nf1=+) 31...Qc7-+ 32.h3 (32.f4 Qf4 33.h3 Qf5-+) 32...Nf4 33.h4 (33.Qc4 Qd7 34.Kf1 Qh3 35.Ke1-+) 33...Rh4 34.Qb5 (34.Qg2 Ng2 35.Kg2 Rh2 36.Kf1-+) 34…Qc8 (34...Qc8 35.Qd7 Qd7 36.Ne4 Qh3 37.Nf6 Bf6 38.c6 Qg2) 0–1. GuestZKLM – GuestFKNL, freechess.org, 2019.

5.Bb5 Bd7 6.Bd7 Nbd7 7.d4 Be7 8.Nf3= 0-0 9.0-0 Rc8 10.Qd3 b6 11.cb6 Nb6 12.Nbd2 Na4 (12...Qc7 13.Rac1=) 13.Rab1 Nb6 (13...Qc7 14.Qa6 Nc3 15.Bc3 Qc3 16.Rb7+=) 14.Ne5 (14.Ba3 Ba3 15.Qa3 Rc2+-) 14...Bd6 15.e4 (15.Rfc1!?+-) 15...de4= 16.Ne4 Nbd5?? (better 16...Ne4 17.Qe4 Be5 18.de5 Qd2=) 17.Nd6+- Qd6 18.Ba3 Qd8 (18...Qc7 19.Bf8 Rf8 20.Qa6 Qc2 21.Qa7+-) 19.Bf8 Qf8 20.Rb7 Nf4 (20...Qd6 21.Rfb1 Nf4 22.Qd2+-) 21.Qf3 N4d5 (21...Ng6 22.Rf7 Qb4 23.Ra7+-) 22.Rf7 Qe8 23.Qg3 g6 (23...Nh5 24.Qb3 Ndf4 25.Re1+-) 24.c4 Ne7 (24...Nh5 25.Qb3 Ne7+-) 25.Rf6 Nf5 26.Qg5 Qe7 27.Rf5 ef5 28.Qe7 (28.Qe7 Re8 29.Qf7 Kh8 30.Rb1 Rd8 31.Rb7 Rd4 32.Qh7) 1–0. GuestRDTL – SecondQueen, freechess.org, 2019.

5.d4 b6 6.cb6 ab6 7.Nd2 Be7 8.Ngf3 0-0 9.Bd3 Ba6 10.0-0 Bd3 11.cd3 Nc6 12.Qb3 Na5 13.Qd1 Rc8 (13...Nc6 14.Ne5 Ne5 15.de5+=) 14.Nb3 Nb3 15.Qb3 Qc7 16.Rac1 Qb7 17.Ne5 Ra8 18.a4 h6 (18...Ra6 19.Rc2+=) 19.Nc6 Bd6 20.Ba3 Ba3 21.Qa3 Ra6? (21...Qa6 22.Ra1+/-) 22.Qb4?? (better 22.Ne7 Kh7 23.Nd5+-) 22...Rfa8+= 23.a5 b5 (23...ba5 24.Ne7 Double attack (24.Qb7 Pinning; 24.Qb7 Deflection)) 24.Ne5 Ra5 25.Rc5 Exerts pressure on the isolated pawn 25...Ra4 (better 25...Ne8!?=) 26.Qb5+/- Qb5 27.Rb5 Ra2 28.h3 Rd2? (better 28...Ne8+/-) 29.Rb7+- Raa2 30.Nf7 (better 30.Rf7 Kh7 31.Re7+-) 30...Nh5+/- 31.Ne5 (better 31.Kh2 Rf2 32.Rf2 Rf2 33.Nd8+=) 31...Ng3=+ 32.Rc1?? (better 32.Rb8 Kh7 33.Rbb1=+) 32...Rf2-+ 33.Rc8 Kh7 34.Rg7 Kg7 35.Rc7 Kg8 (35...Kf8!? 36.Ng6 Ke8 37.Nf4-+) 36.Rc8 Kg7 37.Rc7 Kg8 (37...Kf8!? 38.Ng6 Ke8 39.Nf4-+) 38.Rc8 Kg7 (better 38...Rf8 39.Rf8 Kf8-+) 39.Rc7= ½-½. BeepBeepImAJeep (2760) - playLicht (2440), lichess.org, 2015.

5.d4 b6 6.cb6 Qb6 7.Qc1 Bb4 8.Nd2 Bd2 9.Kd2 Ne4 10.Ke1 0-0 11.Nf3 Ba6 12.Ba6 Qa6 13.Nd2 Qa5 14.c3 Rc8 15.Ne4 de4 16.Kd2 (16.Qc2 Qd5+=) 16...Nc6= 17.a3 (17.Ba3 e5 18.Bc5 ed4 19.ed4 Ne5+=) 17...Rab8 18.Rb1 Rb6 (18...Qg5 19.h4 Qg2 20.Qf1-/+) 19.Ba1 (19.Qc2 e5 20.Kd1 ed4 21.cd4 Qh5 22.Ke1 Qg4-/+) 19...Rcb8 (19...e5 20.Qc2 ed4 21.Qe4-/+) 20.Rb6+= Rb6 21.Qc2 f5 (21...Qa3 22.Qe4 Qa2 23.Qc2=) 22.Rb1 (22.Qa2 Ne7=) 22...Rb1 23.Qb1 Qa3 24.Bb2 (24.Qb7 Qa2 25.Bb2 Qc4=) 24...Qb3+= 25.Qc2 Qb6 (25...Qc4 26.Qd1+=) 26.Ba3= Na5 27.Qa4 Qc7?? (better is 27...h6=) 28.Qe8 1–0. Fournier,Frederic (1915) – bothrops, Active, 2011.

5.d4 Bd7 6.c4 Be7 7.Nf3 0-0 8.Nc3 Nc6 9.cd5 ed5 10.Be2 b6 11.cb6 Qb6 12.Rb1 Rab8 13.Na4?? (better is 13.0-0!?+/–) 13...Qb4 (13...Qa5 14.Kf1 Rb4 15.Nc3-/+) 14.Nc3 (better is 14.Kf1!?=) 14...Ne4-/+ 15.0-0? (better is 15.Ba1 Qa5 16.Rc1-/+) 15...Nc3-+ 16.Bc3 Qc3 17.Bb5 Qa5 18.a4 a6 19.Bd3 Nb4 20.Ne5 Be6 (20...Ba4!? 21.Qf3-+) 21.Rb4 Bb4 (21...Rb4?! 22.Nc6 Qc7 23.Nb4 Bb4 24.Bh7 Kh7 25.Qb1 Kg8 26.Qb4-/+) 22.Nc6 Qc7 (22...Qb6 23.Nb8 Rb8 24.Qc2-+) 23.Nb8 Qb8 24.Ba6 Qd6 25.Bb5 Bd7 26.Qd3 Rb8 27.Ra1 (27.Bd7 Qd7 28.Ra1 Qc6-/+) 27...Ba5 (27...Bb5 28.ab5 Qd7 29.g3-+) 28.g3 Bd8 (28...Bg4 29.Rc1-+) 29.Qe2 (29.Rb1!? Bg4 30.Rc1-+) 29...Bb5-+ 30.ab5 Qb4 31.Rc1 Rb5 32.Rc8 Rb8 33.Rc5 Qb1 34.Kg2 Qe4 35.Qf3 Qf3 36.Kf3 Bf6 37.Rd5 g6 38.e4 Kg7 39.e5 Bg5 40.Rd7 Rd8 41.Rd8 Bd8 42.Ke4 Bb6 43.f4 h5 44.h3 (better is 44.d5!?=) 44...f5+= 45.ef6 Kf6 46.g4 White prepares f5 46...hg4 (46...Ba5!?+=) 47.hg4= Bc7 48.d5 g5 49.f5?? (better is 49.fg5 Kg5 50.Kf3=) 49...Bd6 50.Kd4 Ke7 51.Ke4 Ke8?? (better is 51...Ba3-+) 52.f6+= Kf7 53.Kf5 Bf4 54.d6 Bd6 55.Kg5 Be5 56.Kf5 Bf6 57.g5 Bg5 ½–½. mikebaldini (1635) – bud_spencer (1640), gameknot.com, 2015.

5.d4 Bd7 6.Bd3 b6= 7.cb6 Qb6 8.Bc3 Bb4 (8...Bd6 9.Nf3=) 9.Nf3 Nc6 10.0-0 0-0 11.Ne5 Ne5 (11...Rab8!?+=) 12.de5+- Ne8 13.Qg4 g6?? (better 13...Ba5+-) 14.Bb4+- 1–0. DEFFM – GuestZFBQ, freechess.org, 2019.

5.d4 e5? 6.de5+- Nfd7 (6...Ne4!? 7.Nc3 Be6 8.Ne4 de4 9.Qd8 Kd8 10.Ne2+-) 7.Qd5 Qa5 8.Nc3 Nc5 9.Bb5 Bd7 10.0-0-0 Bb5 11.Nb5 Nbd7 12.Nd6 Bd6 13.Qd6?? (better 13.ed6 0-0 14.Ne2+-) 13...Qa2 (13...0-0-0!? 14.Qd2 Qa2+-) 14.Ne2+- Rc8 15.Nc3 Qa5 16.Nd5 Qd8 17.e6 Ne6 18.Qb4 a5 19.Qa3 (19.Qb5 0-0 20.Nf6 gf6 21.Rd7 Rc5 22.Qc5 Nc5 23.Rd8 Rd8 24.Bf6 Rd7+-) 19...b5 (19...Rc5!?+=) 20.Qd6+- Ndc5 21.Qg3 Qg5?? (better 21...Kf8+-) 22.Qg5+- Ng5 23.Bg7 Rg8 24.Nf6 Ke7 25.Ng8 Rg8 26.Rd5 Nce4 (26...Rg7 27.Rc5 Ne6 28.Rb5 Rg2 29.f4+-) 27.f3 Rg7 28.fe4 Ke6 (28...Ne6 29.Rb5 Rg2 30.Ra5+-) 29.Rb5 1–0. GuestYBNP – GuestJKHF, freechess.org, 2019.

5.Bf6 Qf6= 6.d4 Nc6 (6...Bc5 7.Qf3 Bb4 8.c3=) 7.Nd2 Qd8 (7...e5 8.c4 Be6 9.cd5 Bd5 10.e4+-) 8.Ngf3+/– Be7 (8...b6 9.Bb5 Bd7 10.cb6 ab6 11.0-0+/–) 9.Bb5 0-0 10.0-0 Bf6 (10...a6 11.Bc6 bc6 12.c4+/–) 11.Rb1 Bd7 12.c3 (12.c4 Re8+/–) 12...a6 (12...b6!?+/–) 13.Bd3+- Rb8 14.e4 (14.c4 Ne7+-) 14...de4 15.Ne4 e5 (15...Be7 16.Rb6+-) 16.Nd6 (16.Nf6!? Qf6 17.d5 Na5+-) 16...ed4 17.cd4 Nd4 (17...Qc7 18.Qe1+-) 18.Nd4 Bd4 19.Bh7! Kh7 20.Qd4 Bc6 (20...Qg5 21.f4 (21.Nb7 Bc6 22.Qd3 Kg8-/+) 21...Qg6 22.f5+- (22.Rb7 Rb7 23.f5 Qg5=; 22.Nb7 Bc6 23.g3 Bb7-/+)) 21.Rb3 Qg5 (21...Qf6 22.Rh3 Kg8 23.Qf6 gf6 24.Rg3 Kh7+-) 22.Rh3 Kg8 23.Rg3 Qh6 (23...Qg3 24.fg3 Rbd8+-) 24.Nf5 1–0. spblex (2265) – wmalone (2110), net–chess.com, 2009.

5.g4 Bc5 6.g5 Nfd7 (6...Ne4 7.f3 A) worse 7...Ng5 8.h4+- (worse 8.Bg7 Rg8=+); B) 7...Qg5 8.fe4 Qh4 9.Ke2 Qh5 10.Ke1 Qh4 11.Ke2 Qh5 12.Ke1 Qh4 13.Ke2=) 7.h4 (7.Bg7!? Rg8 8.Bh6+=) 7...Rg8 (7...0-0!?=+) 8.Nf3 Bd6 9.Bd3 Qb6 (9...h6 10.Nc3=) 10.Bd4 Bc5 (10...Qd8!? 11.Bh7 Rh8+=) 11.Bh7+= Rh8 12.Bd3 Nc6? (better 12...Bd4 13.Nd4 e5+=) 13.Bg7+- Rg8 14.Bh6 e5 (14...Nce5 15.Ne5 Ne5 16.Nc3+-) 15.Nc3 e4? (15...Ne7 16.Rb1 Qe6+-) 16.Nd5 Qa5 17.Be4 Bd6 18.Nd4 Nd4 19.ed4 Be7 (19...Kd8 20.Qf3 Re8 21.Kd1+-) 20.Ne7 (20.Qe2!? Bd6 21.g6 Kd8 22.gf7 Rg6+-) 20...Ke7 21.Qe2 Kd8 22.0-0 (better 22.g6!? f6+-) 22...Re8 (22...Qb6 23.Qh5 Qe6 24.Bg2+-) 23.Qf3 Qb6 (23...Qd2 24.Rfd1 Qa5 25.g6+-) 24.Rae1 Qe6 (24...Qd4 25.g6 fg6 26.Bg5 Kc7 27.Bf4 Kd8 28.Bb7 Re1 29.Re1 Bb7 30.Qb7 Qf4 31.Qa8 Qb8 32.Qb8 Nb8 33.Re6+-) 25.Bf5 (better 25.g6 Rg8 26.Bg5 f6+-) 25...Qd6 (25...Qa2 26.Re8 Ke8+-) 26.Re8 Ke8 27.Re1 Kd8 28.Bd7 (better 28.g6 fg6 29.Bg5 Nf6 30.Bc8 Kc8 31.Bf6 Qb4+-) 28...Bd7 29.Qf6 (better 29.Bg7 Be6 30.Qb7 Rb8 31.Bf6 Ke8 32.Qa7 Rc8+-) 29...Qf6 30.gf6 Be6 (30...Rc8 31.c3 Rc6 32.Bg5+-) 31.d3 (31.Re6!? fe6 32.f7 Ke7 33.f8Q Rf8 34.Bf8 Kf8+-) 31...Kd7 32.Bg7 Rc8 33.h5 Bf5 (33...Rc2 34.d5! Bg4+-) 34.Re5 (better 34.Re7 Kc6 35.Rf7+-) 34...Kd6 (34...Bh7 35.Re7 Kc6 36.Rf7+-) 35.c4 (better 35.Rf5 Rc2 36.h6 Rc1 37.Kg2+-) 35...Bd3 36.Rd5 (36.c5!? Kc6 37.Re7 Rd8 38.Rf7 Bc4+-) 36...Ke6 37.Re5 Kd6 38.c5 Kc6 39.f4 Bh7 (39...Rd8 40.Re7 Rd7 41.Kf2+-) 40.Kf2 Rd8 41.Ke3 Rd7 (41...b6 42.f5+-) 42.f5 Rd8 43.Kf4 (better 43.Ke4+-) 43...Rd4 44.Kg5 Rd2?? (44...Rd5 45.Rd5 Kd5+-) 45.Kh6 Bg8 46.Re8 Bh7 (46...b6+-) 47.Rg8 (better 47.Kh7 Ra2 48.Rc8 Kb5 49.h6+-) 47...Bf5?? (better 47...Bg8 48.a3 Rd8-+ (48...Kc5?! 49.Bf8 Kd5 50.Kg7 Rg2 51.Kh8=+)) 48.Kg5 (48.Bf8 Kd5+-) 48...Be6 49.h6 Rd5 50.Kh4 Rc5? (50...Rd4 51.Kg3 Rg4 52.Kf3+-) 51.Kg3 (51.h7 Rc4 52.Kg5 Rc5 53.Kf4 Rh5+-) 51...Kb6?? (51...Rg5 52.Kf3 Rf5 53.Ke3 Re5 54.Kd4 Rd5 55.Ke4+-) 52.Kf2 (52.h7 Rh5 53.h8Q Rh8 54.Rh8 Ba2+-) 52...Rc4?? (better 52...Rh5 53.a3 Kc6+-) 53.h7+- Rc3 (53...Rh4 54.h8Q Rh8 55.Rh8 Ba2 56.Bh6+-) 54.Kg1 (54.h8Q!? Rc2 55.Ke3 Ra2+-) 54...Rc2 (54...Rh3 55.h8Q Rh8 56.Rh8 Ba2+-) 55.h8Q Rc3 (55...Ra2 56.Re8 Ra1 57.Kf2 Ra2 58.Ke3 Ra3 59.Kd4 Ra4 60.Kd3 Ra3 61.Kc2 Bf5 62.Kd2 Ra2 63.Ke3 Ra3 64.Kf4 Rh3+-) 56.Qh3 (better 56.Qh4 Rc1 57.Kf2 Rc2 58.Ke3 Rc3 59.Kd2 Rc4 60.Qf2 Ka6+-) 56...Rc2?? (better 56...Rh3 57.Rd8 Ba2-+) 57.Qh2! Rc1 (57...Rh2 58.Kh2 Combination). FeegLood (2795) – gnejs (2735), lichess.org, time forfeit, 2016.

6.Bb5 Be7 7.a3 a6 8.Bc6 bc6 9.Nf3 Ne4 10.Ne5 Bd7 11.Nd2 Bf6 12.Ndf3 (12.Nd7 Qd7 13.Ne4 de4+/–) 12...0-0 13.Nd2 Be5 14.Ne4 Bc7 15.Nd2 Qh4 16.g3 Qe7 17.0-0 e5 18.Re1 e4 19.Rb1 Bh3 20.Bc3 Rab8 21.Qe2 Qg5 22.Qa6 h5? (better is 22...Ra8!? 23.Qb7 Rfc8+=) 23.Qc6+- Rb1 24.Rb1 (< 24.Nb1 Rc8 25.Qa6 h4+/–) 24...Bb8 (24...Rc8 25.Qb5 h4 26.Qe2+-) 25.a4 (25.Ba5!? h4 26.Bc7 hg3 27.hg3 Bc7 28.Qc7 Qh5+-) 25...h4 26.Ne4 de4 27.a5?? (27.Qe4 hg3 28.hg3 Bg3 29.fg3 Qg3 30.Kh1+=) 27...hg3 (27...Qg4 28.Qd7 Qd7-+) 28.hg3 (28.Qe4 gh2 29.Kh1 Qh5-+) 28...Bg3 29.Qe4 (29.fg3 Qg3) 29...Bc7 30.Kh1 Bf5 31.Qc6?? (better is 31.Qg2 Qh5 32.Kg1=+) 31...Qh4-+ 32.Kg1 Qh2 (better is 32...Be4 33.Qe4 Qe4-+) 33.Kf1 Bh3 (33...Bc2?! 34.Rb2 Bg6 35.Ke2=) 34.Ke2 Bg3?? (34...Bg4 35.Kd3 Qf2 36.Re1 Bf5 37.e4 Qf3 38.Kc4-+) 35.Be1?? (better is 35.Qf3 Bc7 36.Rh1+-) 35...Bg4-+ 36.Kd2 (better is 36.Kf1 Qh3 37.Qg2 Be2 38.Kg1 Bh2 39.Kh1-/+) 36...Bf2 37.Kc3 Be3 (better is 37...Qg1 38.Bf2 Qb1-+ (38...Qf2?! 39.Kb2-+)) 38.Kb2?? (38.Qe4 Qh3 39.Kb2-+) 38...Bd4 39.Kb3 (39.Bc3 Bf5 40.Bd4 Qc2 41.Ka3 Qb1-+) 39...Rb8 40.Kc4 (40.Ka3 Rb1 41.Qe8 Kh7 42.Qe4 g6 43.Qd4 Qc2-+) 40...Qc2 41.Kd4 Qb1 42.Bg3 (42.Bc3 Rd8 43.Qd6 Qd1 44.Ke3 Qf3 45.Kd2 Rd6 46.cd6 Qe2 47.Kc1-+) 42...Qg1 43.Kc4 Be6 44.Kc3 (44.Qe6 Qc1 45.Kd3 Qa3 46.Kd4 Rb4 47.Qc4 Qa1 48.Kd5 Qd1 49.Kc6 Rc4 50.Bd6-+) 44...Qg3 45.Kd2 Rb2 46.Kc1 Qc3 47.Kd1 Bb3 0–1. willi_weizenkeim – schachsky, playchess.de, 2003.

6.c4 b6 7.cd5 Nd5+=.

6.Nd2 Qa5 7.Ngf3 Ne4 8.Bd3 Nc3 9.Qc1 (9.Bc3 Qc3 10.Rb1+/-) 9...e5? (better 9...Na2 10.Qb1 Nc3 11.Bc3 Qc3+/-) 10.Nb3+- (10.Ne5?! Ne5 11.de5 Qc5+/-; 10.de5 Na2 11.Qb1 Nc3 12.Ra5 Nb1+/-) 10...Qb4 11.a3 (11.de5?! Ne4 12.Nfd2 Nc5 13.Nc5 Bc5+/-; 11.Ne5?! Ne5 12.de5 Na4 13.c3 Nc5 14.Nc5 Qc5+/-) 11...Na2? (11...Qa4 12.Bc3 e4 13.Be2 ef3 14.Bf3+-) 12.ab4 (better 12.Qd2 Qd2 13.Nfd2 ed4 14.Nd4 Bc5 15.Ra2 Nd4 16.Bd4 Bd4 17.ed4 Be6+-) 12...Nc1 13.Nc1 e4 14.0-0 (14.Nd2!? ed3 15.Nd3 Bf5+-) 14...ef3 15.gf3 Nb4 16.Nb3 (16.e4 f5+/-) 16...Nd3+= 17.cd3 Bh3 18.Rfc1 Be7 19.Nd2 0-0 (19...h5 20.e4+=) 20.e4 Rfd8 21.e5 (21.f4!?+=) 21...Bg5= 22.Rd1 Bf5 (22...a5 23.Bc1=) 23.Nf1+= Rac8? (23...Rdc8!?+=) 24.Ne3 (24.Ra7 f6+-) 24...Be6 (24...Be3 25.fe3 b6 26.Rdc1+/-) 25.Bc3 (25.Ra7 Rd7+-) 25...Bf4? (better 25...a6!?+=) 26.Ra7+- Rc7?? (better 26...b6 27.Ng2 Bh6+-) 27.Rb1 (better 27.Ba5 b6 28.Rc7 ba5+-) 27...Rb8 28.Ba5 Rd7 (28...Rc6+-) 29.Ng2 (29.c6!? Re7 30.cb7 h6+-) 29...Bg5 (29...b5 30.cb6 (30.Nf4?! Ra7 31.Bb6 Ra4+=) 30...g5 31.b7+-) 30.Kf1 (30.c6 Re7 31.cb7 h5+-) 30...f6 (30...Rc8 31.h4 Bh6 32.Ke2+-) 31.h4 (31.c6!? Rf7 32.Rbb7 Rbf8+-) 31...Bh6 32.ef6 (32.c6 Rf7 33.cb7 Bf5+-) 32...Bh3 (32...Rf8 33.Ke2+-) 33.Kg1 (better 33.c6 Rf7 34.Rbb7 (34.Rab7?! Rc8 35.Rb8 Rf6 36.Rc8 Bc8+-) 34...Rfb7 35.cb7+-) 33...gf6 34.Kh2 Bf5 (34...Bg2 35.Kg2 Rg7 36.Kf1 Bf4+-) 35.Kg3 (better 35.c6 Re7 36.Rbb7+-) 35...Bd3 (35...Rg7 36.Kh2 Rd7+-) 36.Re1 Rg7 37.Kh2 Bf5 (37...Rc8 38.Bb6+/-) 38.Ne3+- Be3 39.Re3 (39.fe3 Re8+-) 39...Rf8 (39...Kh8 40.Re1+/-) 40.Re6?? (better 40.Rb3 Bc8 41.Bd2+-) 40…Bd3. ClayPigeons (2140) - Sasuke_Uchiha (2065), Rated Bullet game, lichess.org, 2019.

6.Nd2 b6 7.cb6 ab6 8.c4 Bb4 9.Ngf3 Ne4 10.Bd3 Nd2 11.Nd2 Ba6 12.0-0 Bd2 13.Qd2 dc4 14.Be4 Qd7 (14...Bb7 15.Qe2+=) 15.Ba3 (15.Qc3 f6+-) 15...f5 (15...Bb7!? 16.Bb4 b5=) 16.Bf3+- Kf7 (16...Bb7 17.Qc3+-) 17.Rab1 (17.Qc3 Rhd8+-) 17...b5 18.Bc5 Rhd8 19.Rb2 (19.Qb2 Rdc8+-) 19...Kg8 (19...e5 20.Qc2 e4 21.Be2+=) 20.Rfb1 (20.Rd1 Rac8+=) 20...e5+= 21.Bb6 Rdb8 22.Bc5 e4 23.Be2 (better 23.Bd1=) 23...Ne7?? (better 23...Rc8=) 24.Bc4! Kh8 (24...bc4 25.Rb8 Pinning (25.Rb8 Deflection; 25.Rb8 Decoy)) 25.Be7 Qe7 26.Bb5 Bb5 27.Rb5 Rb5 28.Rb5 h6 (28...Qd7 29.Qb2 Rg8 30.a3+-) 29.g3 (29.Rf5!? Qa3 30.h3 Qa4+-) 29...Qd7 30.Qb2 Qf7 (30...Kh7 31.Qb1+-) 31.d5 (31.Rb8 Rb8 32.Qb8 Kh7+-) 31...Qe7? (better 31...Qh5 32.h3! Kh7+-) 32.Rb8 Rb8 33.Qb8 Kh7 34.d6 Qe6 35.Kg2 f4 36.ef4 (36.gf4?! Qg4 37.Kf1 Qd1 38.Kg2 Qg4 39.Kh1 Qd1 40.Kg2 Qg4=) 36...e3 (36...Qd5 37.Qb1 Kh8 38.Kg1+-) 37.Qb1 Kh8 38.fe3 Qd6 39.Qc2 Qd5 (39...Kg8 40.a4+-) 40.e4 Qd4 41.Qe2 (41.a4 Kg8+-) 41...Qc4 (41...g6+-) 42.Qc4 (42.Qc4 h5 43.e5 Kh7 44.e6 g5 45.e7 gf4 46.Qf7 Kh6 47.e8Q f3 48.Kf3 Kg5 49.Qe3) 1–0. FeegLood (2705) – Silent_Bluntman (2350), lichess.org, 2016.

6.Bd3 Be7 7.Nf3 Qc7 8.0-0 0-0 9.c3 b6 10.cb6 Qb6 11.Qc2 Rb8 12.Ba3 Ba3 13.Na3 Qb2 (better is 13...Ba6!?+=) 14.Qb2+- Rb2 15.Rfb1 Rb1 16.Rb1 (16.Bb1?! Ba6+/–) 16...Bd7 17.Rb7 Rc8 18.h3 Na5 (18...a5!? 19.Bb5 Kf8+-) 19.Ra7+- Nc6 20.Rb7 (20.Ra6 Kf8+-) 20...Ra8? (better is 20...Na5 21.Rb6 Rc3 22.Rb8 Be8+/–) 21.Rb3+- Na5 22.Rb2 Rc8 23.Rc2 Ba4 24.Rc1 Rb8 25.Rb1 Rc8 26.Rc1 g6?? (26...Rb8 27.c4 dc4 28.Nc4 Rc8+-) 27.Ne5 Ne4 28.Be4 de4 29.c4 f6 30.Ng4 Kf7 31.c5 h5 32.Nh2 Nc6 (32...Bc6 33.Nf1+-) 33.Nf1 Nb4 34.Ra1 Nd3 35.Nc4 Ra8 36.Nb6 Ra6 37.Na4 Ra4 38.Nd2 Nb4? (38...f5 39.Nb3+-) 39.a3 (39.Ne4 Ra2 40.Ra2 Na2+-) 39...Nc2 (39...f5 40.Nc4+- (40.ab4?! Ra1 41.Kh2 e5+/–)) 40.Ra2 Na3 41.Ne4 f5 (41...Ke7+-) 42.Nd6 Ke7 43.Nb5! Rb4 (43...Nb5 44.Ra4) 44.Na3 Rb1 1–0. Fournier,Frederic (1760) – Katanougou (1860), 3 min + 0s chess16.com, 2008.

6.Be2 Bd7 7.Nf3 b6 8.cb6 Qb6 9.Qc1 Rb8 10.Bc3 Bd6 11.0-0 0-0 12.a4 Ne4 13.Be1 Qb2 14.Qb2 Rb2 15.Bd3 f5 16.c4 Rfb8 17.c5 Bc7 18.Bc3 Nc3 (better is 18...Rb1!? 19.Rfb1 Nc3 20.Rb8 Nb8=+) 19.Nc3+/– Ba5 20.Nb5 Nb4 21.Rfd1 Nd3 22.Rd3 Bb5 23.ab5 R8b5 24.h3 Rc2 25.Rda3 Bc3 26.R1a2 Rb1 27.Kh2 Rbb2? (better is 27...Ra2 28.Ra2 Rb7+/–) 28.Rb2+- Bb2 29.Ra7 Rf2 (29...h6 30.Kg3+-) 30.Kg3 (30.c6!? Rc2 31.c7 Ba3 32.Ra8 Kf7+-) 30...Re2 (30...Rc2 31.Ng5 g6 32.Ne6 Bc1 33.Rg7 Kh8+-) 31.c6 Rc2 32.c7 (32...Ba3 33.Ra8 (< 33.Ra3 Rc7 34.Ng5 Rc8+-) 33...Kf7 34.c8Q (< 34.Ra3 Rc7 35.Ng5 Kf6 36.Nh7 Kg6 37.Nf8 Kf7+-) 34...Bd6 35.Ne5 Be5 36.de5 Rc8 37.Rc8+-) 1–0. Grits – passionfar19, Live Game Caissa's Web, 2004.

6.Nf3 b6 7.cb6 Qb6 8.Qc1 (8.Bc3 Ba6+=) 8...Bb4 (8...Rb8!? 9.Bc3 Ba6=) 9.Nbd2 Ne4 10.c3 Nd2 11.Qd2 (worse is 11.cb4 Nf1 12.Kf1 Nb4+=) 11...Ba5 12.Bd3 Ba6 13.Rb1 Bd3 14.Qd3 0-0 15.0-0 Qc7 16.Rfc1 Bb6 (16...Rfc8 17.c4+/–) 17.c4+- Qd7 18.c5 Bc7 19.Bc3 a5 20.Rb7?? (20.Ng5 f5+/–) 20...Rfb8?? (20...Bh2 21.Kh2 Qb7 22.Ng5-/+) 21.Rcb1?? (21.Rb3 Bd8+/–) 21...g6?? (21...Rb7 22.Rb7 Bh2 23.Kh2 Qb7 24.Ng5-+) 22.a3?? (22.Rb8 Rb8 23.Rb8 Nb8+/–) 22...Qc8?? (better is 22...Rb7 23.Rb7 Bh2 24.Nh2 Qb7-+) 23.Rb8 Rb8 24.g3 Rb1 25.Qb1 Qb8 (25...Qa6 26.Qc2+/–) 26.Qb8 Bb8 27.Nd2 Bc7 28.Kf1 f6 29.Ke2 Kf7 30.Kd3 e5 31.f3 Ke6 32.Nb3 g5 33.e4 h5 34.h3 a4= 35.Nd2 ed4 36.Bd4 Nd4 37.Kd4 de4?? 38.Ne4+- Be5 39.Kc4 Kf5 40.Nd6 Ke6 41.g4 hg4 42.fg4 Bb2 43.Kb4 Kd5 44.Nf5 Kc6 45.Ne3 Bd4+/– 46.Nf5 Bc5 47.Ka4+/– Kd5 48.h4 gh4= 49.Nh4 Ke4 50.Nf5 Kf4 51.Nh6 ½–½. Fournier,Frederic – omni13, Chess.com, 2013.

6.Nc3 A) 6...Nc6 A1) 7.Bd3 e5 (7...b6 8.cb6 0-0 9.Nf3 ab6 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; 7...0-0 8.Nf3 b6 9.cb6 ab6 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; 7...Bd7 8.Nf3 b6 9.cb6 Qb6 10.Rb1 Qa5 11.0-0 Rb8 12.Qd2 0-0) 8.Nge2 0-0 9.0-0 Be6 10.f3 Qa5 11.Rb1 b6 12.Nb5 ed4; A2) 7.Nf3 0-0 (7...Bd7 8.Bb5 0-0 9.0-0 Qa5 10.Qe2 Rfc8 11.Rab1 Rab8 12.a4 b6; 7...Qa5 8.Bb5 Ne4 9.Qd3 0-0 10.0-0 f5 11.a3 Bd7 12.h3 Rf6; 7...b6 8.Bb5 Bb7 9.Ne5 Qc7 10.Ba3 bc5 11.Nc6 Bc6 12.Rb1 cd4) 8.Bb5 Bd7 9.0-0 Qa5 10.Qe2 Rac8 11.a4 Qb4 12.Rab1 h6; B) 6...Qa5 B1) 7.Bb5 Bd7 (7...Nc6 8.Nf3 Ne4 9.Qd3 0-0 10.a3 Bd7 11.0-0 f5 12.h3 Rf6) 8.Bd3 b6 9.cb6 ab6 10.Qd2 Nc6 11.Nf3 0-0 12.0-0 h6; B2) 7.Qd2 Nc6 (7...0-0 8.Nf3 Nc6 9.Bd3 b6 10.cb6 ab6 11.0-0 Bb7 12.h3 h6; 7...b6 8.Nf3 bc5 9.Nb5 Qd2 10.Kd2 Na6 11.dc5 Bc5 12.Bd3 0-0) 8.Nf3 0-0 9.Bd3 b6 10.cb6 ab6 11.0-0 Bb7 12.a4 Bb4; B3) 7.Bd3 b6 (7...Nc6 8.Nge2 b6 9.cb6 Rb8 10.0-0 Rb6 11.Rb1 0-0 12.a4 Bd7; 7...0-0 8.Nf3 Nc6 9.0-0 g6 10.h3 Bd7 11.a4 Qb4 12.Rb1 Qa5; 7...Bd7 8.Nf3 Nc6 9.0-0 b6 10.cb6 Rb8 11.Ne2 Rb6 12.Bc3 Qa3) 8.Nf3 bc5 9.0-0 c4 10.Be2 Bb4 11.Nb1 c3 12.Bc1 Nc6; C) 6...b6 C1) 7.cb6 0-0 (7...ab6 8.Nf3 Nc6 9.Bd3 0-0 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; 7...Nc6 8.Nf3 0-0 9.Bd3 ab6 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; 7...Qb6 8.Rb1 Nc6 9.Nf3 Rb8 10.Bd3 0-0 11.0-0 Qa5 12.Qd2 Bd7; 7...Bb7 8.ba7 Nc6 9.Nf3 0-0 10.Bd3 Ra7 11.0-0 Ra5 12.Qd2 h6; 7...Nbd7 8.Nf3 ab6 9.Bd3 0-0 10.0-0 Bb7 11.h3 Qc7 12.Nb5 Qc6) 8.Bd3 Nc6 9.Nf3 ab6 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; C2) 7.Nf3 bc5 (7...0-0 8.cb6 Nc6 9.Bd3 ab6 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; 7...Bb7 8.cb6 ab6 9.Bd3 Nc6 10.0-0 0-0 11.h3 g6 12.Nb5 Qd7; 7...Nc6 8.cb6 ab6 9.Bd3 0-0 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7) 8.Ne5 0-0 9.Bb5 Qd6 10.0-0 a6 11.Ba4 h6 12.Rb1 Nbd7; C3) 7.Rb1 bc5 (7...Bd7 8.Nf3 bc5 9.Bd3 c4 10.Be2 Nc6 11.0-0 0-0 12.Ne5 Rb8; 7...Nc6 8.Nf3 bc5 9.Bb5 Bb7 10.0-0 0-0 11.Ba3 cd4 12.Be7 Qe7; 7...0-0 8.Nf3 Nc6 9.Bb5 Bb7 10.Ba3 Nd7 11.Ba4 Qc8 12.0-0 Rd8; 7...Nbd7 8.Nf3 bc5 9.Be2 0-0 10.0-0 Rb8 11.Qd2 Ne4 12.Qe1 Nd6) 8.Nf3 Bd7 9.dc5 Bc5 10.Bd3 Nc6 11.0-0 0-0 12.Nb5 Rb8; C4) 7.Be2 bc5 (7...Nc6 8.Nf3 bc5 9.0-0 0-0 10.Rb1 Rb8 11.h3 Qa5 12.Ne5 Bb7; 7...0-0 8.cb6 ab6 9.Nf3 Nc6 10.0-0 Bb7 11.Ne5 h6 12.a4 Qb8; 7...Bb7 8.Nf3 bc5 9.0-0 Nc6 10.Rb1 Rb8 11.dc5 Bc5 12.Na4 Bd6; 7...Nbd7 8.Nh3 bc5 9.0-0 0-0 10.Nf4 cd4 11.ed4 Rb8 12.Rb1 Qa5) 8.Nf3 0-0 9.Ne5 Bb7 10.Qd2 Nc6 11.0-0 cd4 12.ed4 Qb6; C5) 7.Bb5 Bd7 8.Nf3 bc5 9.0-0 0-0 10.Qe2 a6 11.Bd7 Nbd7 12.Rab1 Qc7; D) 6...Bd7 D1) 7.Bd3 Nc6 (7...b6 8.e4 de4 9.Ne4 bc5 10.dc5 Bc6 11.Qf3 Ne4 12.Be4 Qa5; 7...0-0 8.Nf3 Nc6 9.0-0 b6 10.cb6 Rb8 11.Rb1 ab6 12.Ne5 Ra8) 8.Nf3 b6 9.cb6 Rb8 10.Rb1 Qb6 11.Ba3 Nb4 12.0-0 Qa5; D2) 7.Qd2 b6 (7...Nc6 8.Nf3 Ne4 9.Ne4 de4 10.Ng1 b6 11.c4 Na5 12.d5 Bc5; 7...0-0 8.Nf3 Nc6 9.Bd3 b6 10.cb6 Qb6 11.Rb1 Rab8 12.Ne5 Qa5) 8.cb6 Nc6 9.Nf3 Qb6 10.Rb1 Ne4 11.Ne4 de4 12.Ne5 Ne5; D3) 7.Nf3 b6 (7...0-0 8.Bd3 Nc6 9.0-0 b6 10.cb6 Rb8 11.Rb1 ab6 12.Ne5 Ra8; 7...Nc6 8.Bb5 Qc7 9.0-0 h6 10.Bd3 0-0 11.Nb5 Qa5 12.Qe1 Qe1) 8.cb6 Qb6 9.Rb1 Qa5 10.Bd3 Nc6 11.0-0 Rb8 12.Qd2 0-0; E) 6...0-0 E1) 7.Bd3 Nc6 (7...b6 8.cb6 Nc6 9.Nf3 ab6 10.0-0 Bb7 11.h3 g6 12.Nb5 Qd7; 7...Bd7 8.Nf3 Nc6 9.0-0 b6 10.cb6 Qb6 11.Rb1 Rab8 12.Ba3 Qc7) 8.Nf3 b6 9.cb6 ab6 10.0-0 Bb7 11.h3 Qc7 12.Nb5 Qd7; E2) 7.Be2 b6 (7...Nc6 8.Nf3 b6 9.cb6 ab6 10.0-0 Bb7 11.Ne5 h6 12.Qd3 Ne5; 7...Qa5 8.Nf3 Nc6 9.0-0 Bd7 10.Ne5 b6 11.Qe1 Ne5 12.de5 Ne8) 8.Nf3 bc5 9.Ne5 Bb7 10.0-0 Nc6 11.Rb1 Rb8 12.Qd2 cd4; E3) 7.Nh3 Nc6 (7...b6 8.Bb5 bc5 9.0-0 a6 10.Ba4 Bd7 11.Nf4 Nc6 12.Rb1 Rb8) 8.Nf4 b6 9.Bb5 Bd7 10.cb6 ab6 11.0-0 Qc7 12.Qd2 Na5; E4) 7.Nf3 b6 (7...Bd7 8.Bd3 Nc6 9.0-0 b6 10.cb6 Rb8 11.Rb1 ab6 12.Ne5 Ra8; 7...Nc6 8.Bb5 Bd7 9.0-0 Qa5 10.Qe2 Rfc8 11.Rab1 Rab8 12.a4 b6) 8.cb6 Nc6 9.Bd3 ab6 10.0-0 Bb7 11.h3 Ra5 12.Qe2 Qd7.

6.c4 dc4 7.Bc4+- 1–0. GuestPMJM – GuestBGFJ, freechess.org, 2017.

6.Nd2 Nc6 7.Ngf3 0-0 8.Bd3 Re8 (8...b6 9.Ne5 Qc7 10.cb6 ab6 11.0-0+=) 9.0-0 Ne4? (better 9...b6+=) 10.Ne4+- de4 11.Be4 f5 12.Bc6 bc6 13.Ne5 Qc7 14.c4 Bf6 15.f4 Be5 16.fe5 Ba6 17.Qd3 (17.Qa4 Rab8+-) 17...Rab8 18.Bc3 Rb7 19.Rfb1 Reb8 20.Rb7 Rb7 21.Rb1 (21.Rf1 Qd7+-) 21...Qb8 (better 21...Rb1!? 22.Qb1 Bc4+/-) 22.Rb7+- Qb7 23.Kf2 g6 24.g3 Kf7 25.e4 (25.h3 Ke8+-) 25...Qc7? (better 25...fe4 26.Qe4 Bc4+/-) 26.ef5+- ef5 (26...gf5 27.Bd2+-) 27.Bb4 (better 27.d5!? Ke8+-) 27...Bc8 (27...Qe7 28.Qe2+-) 28.Qa3 (28.Qb3 Qb8+-) 28...Qd7 29.Ke3 (29.Bc3 Qb7+-) 29...Ke7? (better 29...f4 30.Kd3 fg3 31.hg3 Qf5 32.Ke3 Qg5 33.Kf2 Qf5 34.Ke2 Qg4 35.Qf3 Qf3 36.Kf3 Be6+/-) 30.d5!+- cd5 (30...Qb7+-) 31.c6 Ke6 32.cd7 Bd7 (32...Kd7 33.Qa7 Kc6 34.cd5 Kd5 35.Qc5 Ke6 36.Qc6 Kf7 37.Qf6 Ke8 38.Qe7) 33.cd5 (33.Qa6 Bc6 34.Qc6 Kf7 35.Qf6 Ke8 36.Qe7) 33...Ke5 (33...Kf7 34.Bf8 g5 35.Qe7 Kg6 36.g4 f4 37.Kd4 Bg4 38.Qf6 Kh5 39.Qh6) 34.Qc3 Kd5 35.Qc5 Ke6 36.Qe7 Kd5 37.Qd6 Kc4 38.Qc5 1-0. BeepBeepImAJeep (2595) - Psychomantis (1725), lichess.org, 2016.

6.Bd3 0-0 7.Nf3 (7.Nc3 b6 8.cb6 Nc6 9.Nf3 ab6 10.0-0 Bb7 11.h3 h6 12.Nb5 Qd7; 7.c4 b6 (7...Nc6 8.Nf3 b6 9.cd5 ed5 10.Nbd2 bc5 11.dc5 Bc5 12.Rc1 Nb4 ) 8.Nf3 bc5 9.cd5 cd4 10.Bd4 Nd5 11.Qc2 f5 12.a3 Ba6) 7...b6 8.cb6 (8.0-0 bc5 9.Nc3 c4 10.Be2 Nc6 11.Ne5 Bd7 12.Rb1 Rb8) 8...Qb6 9.Qc1 Ba6 (9...Nc6 10.Nc3 Rb8 11.Rb1 Qa5 12.0-0 Bd7) 10.Ne5 (10.Ba3 Bd3 (10...Nc6 11.Be7 Ne7 12.Qa3 Bd3) 11.cd3 Nc6+= 12.0-0 Nb4; 10.Nc3 Nc6 11.0-0 Rab8 12.Rb1 Qa5) 10...Nc6 11.Nc6 (11.0-0 Rab8 12.Nc6 Qc6) 11...Qc6 12.Nd2 (12.0-0 Rfc8=; 12.Ba3 Bd3) 12...Bd3 (12...Rfc8-/+) 13.cd3 Qa6 14.0-0 Qd3 ½–½. Khrustalev,Alexandr (1930) – Mikhailov,Stepan (1990), Open, Dubna RUS, 2007.

6.Bd3 b6 A) 7.Nf3 bc5 8.dc5 Bc5 9.Nbd2 Nc6 10.0-0 0-0 11.Ne5 Ne5 12.Be5 Bd6; B) 7.Nd2 bc5 8.Ngf3 c4 9.Be2 Nc6 10.0-0 Rb8 11.Bc3 0-0 12.Rb1 Bb7; C) 7.c4 bc5 (7...dc4 8.Bc4 Nc6 9.Nf3 bc5 10.Nbd2 Rb8 11.Rb1 Qa5 12.dc5 Qc5; 7...Nc6 8.cd5 ed5 9.Nd2 Rb8 10.Rb1 bc5 11.dc5 Bc5 12.Ngf3 Nb4; 7...0-0 8.cd5 bc5 9.Nf3 cd4 10.Nd4 Qd5 11.0-0 Bb7 12.f3 Qg5) 8.cd5 Qb6 9.Qb3 ed5 10.dc5 Bc5 11.Nf3 Nc6 12.Bf6 Qb3; D) 7.Nc3 bc5 8.Nf3 c4 9.Be2 Nc6 10.0-0 Rb8 11.Rb1 0-0 12.Ne5 Qc7.

6.Bd3 Nc6 A) 7.Nd2 b6 (7...Qc7 8.Ngf3 b6 9.Nb3 0-0 10.0-0 Rb8 11.Rb1 Bb7 12.c4 Nb4) 8.cb6 ab6 9.Ngf3 0-0 10.0-0 Bb7 11.a3 Qc7 12.c4 h6; B) 7.Nc3 e5 (7...b6 8.cb6 0-0 9.Nf3 ab6 10.0-0 Bb7 11.h3 Re8 12.Nb5 Qd7; 7...Bd7 8.Nf3 b6 9.cb6 ab6 10.0-0 0-0 11.e4 h6 12.Re1 Re8) 8.Nge2 0-0 9.0-0 Be6 10.f3 h6 11.Qd2 Qa5 12.Bb5 Rab8; C) 7.Nf3 b6 (7...Bd7 8.Nbd2 0-0 9.0-0 b6 10.c4 bc5 11.dc5 Rb8 12.Rb1 Bc5) 8.Ne5 Bd7 9.Nd7 Qd7 10.cb6 0-0 11.Nc3 ab6 12.0-0 Nb4.

6.Nf3 A) 6...Bd7 A1) 7.Nc3 b6 (7...Nc6 8.Bb5 0-0 9.0-0 Qa5 10.Qe2 Rfc8 11.Bc6 Bc6 12.Ne5 Nd7) 8.cb6 ab6 9.Bd3 Nc6 10.0-0 0-0 11.e4 g6 12.Re1 Ra5; A2) 7.Nbd2 Nc6 (7...0-0 8.Bd3 b6 9.0-0 Nc6 10.Nb3 Qc7 11.c4 dc4 12.Bc4 Rab8; 7...g6 8.Bd3 Nc6 9.0-0 0-0 10.Qe2 b6 11.Nb3 Qc7 12.Bc3 Rab8; 7...b6 8.Nb3 Nc6 9.Bd3 0-0 10.0-0 Rb8 11.Rb1 a5 12.cb6 Qb6; 7...Qc7 8.Bd3 Nc6 9.0-0 b6 10.c4 bc5 11.dc5 0-0 12.Rb1 Rab8; 7...h5 8.Bd3 Nc6 9.0-0 0-0 10.Ne5 Nb4 11.Qf3 Nd3 12.cd3 Qa5) 8.Bd3 b6 9.Nb3 0-0 10.0-0 Qc7 11.g3 Rab8 12.Rb1 Ne4; A3) 7.Bd3 Nc6 (7...b6 8.Nbd2 bc5 9.dc5 Bc5 10.c4 Nc6 11.cd5 Nb4 12.Ne5 Rb8; 7...0-0 8.Nc3 Nc6 9.0-0 b6 10.cb6 Qb6 11.Rb1 Rab8 12.Ba3 Qc7) 8.c4 b6 9.cd5 ed5 10.Nbd2 bc5 11.dc5 0-0 12.0-0 Rb8; A4) 7.Be2 Nc6 (7...0-0 8.c4 b6 9.Nc3 Nc6 10.cd5 ed5 11.0-0 bc5 12.dc5 Rb8; 7...Qa5 8.Qd2 Nc6 9.Qa5 Na5 10.Nc3 Nc6 11.Nb5 0-0 12.Nd6 Ne4; 7...h6 8.c4 0-0 9.Nc3 Nc6 10.0-0 Rb8 11.cd5 ed5 12.Ne5 Bf5; 7...g6 8.c4 0-0 9.Nc3 Nc6 10.0-0 dc4 11.Bc4 b6 12.cb6 Qb6; 7...b6 8.c4 0-0 9.Nc3 Nc6 10.cb6 ab6 11.0-0 Bd6 12.Nb5 Qb8; 7...h5 8.0-0 0-0 9.c4 Nc6 10.Nc3 b6 11.cd5 ed5 12.cb6 Qb6) 8.0-0 b6 9.c4 bc5 10.cd5 Nd5 11.Nc3 Rb8 12.Qc1 Qb6; A5) 7.c4 Nc6 (7...0-0 8.Nc3 Nc6 9.cd5 ed5 10.Bd3 b6 11.cb6 Qb6 12.Rb1 Rab8; 7...h6 8.Nc3 Nc6 9.Bd3 0-0 10.0-0 dc4 11.Bc4 b6 12.cb6 Qb6; 7...b6 8.Nc3 Nc6 9.cd5 ed5 10.cb6 Qb6 11.Rb1 Qa5 12.Bd3 0-0; 7...Qa5 8.Nc3 Nc6 9.Bd3 0-0 10.0-0 dc4 11.Bc4 b6 12.cb6 ab6; 7...g6 8.Nc3 Nc6 9.Bd3 0-0 10.0-0 dc4 11.Bc4 b6 12.cb6 Qb6) 8.Nc3 0-0 9.cd5 ed5 10.Bb5 b6 11.Qa4 Rc8 12.cb6 Qb6; B) 6...0-0 7.Nc3 (7.c4 b6 8.cd5 bc5 9.Nc3 Nd5 10.dc5 Nc6 11.Nd5 ed5 12.Bd3 Rb8) 7...b6 (7...Bd7 8.Bd3 Nc6 9.0-0 b6 10.cb6 Rb8 11.Rb1 Qb6 12.Ba3 Qc7; 7...Nc6 8.Bb5 Bd7 9.0-0 Qa5 10.a4 a6 11.Bc6 Bc6 12.Qd3 h5) 8.cb6 Nc6 9.Bd3 ab6 10.0-0 Bb7 11.h3 Qc7 12.Re1 h6; C) 6...b6 C1) 7.c4 0-0 (7...bc5 8.cd5 ed5 9.Nc3 0-0 10.dc5 Bc5 11.Bb5 a6 12.Bd3 Bg4) 8.Nc3 bc5 9.cd5 ed5 10.dc5 Bc5 11.Bb5 a6 12.Bd3 Bg4; C2) 7.Nc3 0-0 (7...bc5 8.Bb5 Nbd7 9.0-0 0-0 10.Rb1 Rb8 11.Qd2 Bb7 12.h3 a6; 7...Bd7 8.cb6 ab6 9.Bd3 Nc6 10.0-0 0-0 11.e4 Nb4 12.Ne5 Qc7) 8.cb6 Nc6 9.Bd3 ab6 10.0-0 Bb7 11.h3 Qd6 12.Nb5 Qd7; C3) 7.Bb5 Bd7 8.Bd7 Qd7 9.Nc3 Nc6 10.Ne5 Qb7 11.cb6 ab6 12.0-0 0-0; D) 6...Nc6 D1) 7.Nc3 Bd7 (7...0-0 8.Bb5 Bd7 9.0-0 Qa5 10.Qe2 Rfc8 11.Rab1 b6 12.Nd2 a6; 7...Qa5 8.Bd3 b6 9.Ne5 Ne5 10.de5 Nd7 11.0-0 Nc5 12.Nb5 Nd3; 7...Rb8 8.Bd3 0-0 9.0-0 Bd7 10.Rb1 Qa5 11.Ne5 b6 12.Qe1 Ne5) 8.Bb5 Qa5 9.0-0 0-0 10.a4 a6 11.Bd3 b6 12.cb6 Rfb8; D2) 7.c4 Ne4 (7...0-0 8.Nc3 b6 9.cd5 Nd5 10.Bb5 Bb7 11.Rc1 bc5 12.dc5 a6; 7...Bd7 8.Nc3 0-0 9.cd5 ed5 10.Bb5 Na5 11.Bd7 Qd7 12.0-0 Qf5; 7...Qc7 8.Nc3 0-0 9.Nb5 Qa5 10.Bc3 Qd8 11.Bd3 a6 12.Nd6 Bd6) 8.Nc3 0-0 9.Bd3 Qa5 10.Qb3 Nb4 11.Be4 de4 12.Ne4 Nc2; D3) 7.Bb5 a6 (7...Qa5 8.Nc3 Ne4 9.Qd3 0-0 10.a3 Bd7 11.0-0 f5 12.h3 Rf6; 7...Ne4 8.0-0 Qa5 9.c4 0-0 10.Nbd2 a6 11.Ba4 Nd2 12.Nd2 Rd8; 7...0-0 8.Nc3 Bd7 9.0-0 Qa5 10.Qe2 Rfc8 11.Bc6 Bc6 12.Ne5 Nd7; 7...Bd7 8.Nc3 0-0 9.0-0 Qa5 10.Qe2 Rfc8 11.Bc6 Bc6 12.Ne5 Nd7; 7...h6 8.Nc3 Bd7 9.0-0 0-0 10.Qd2 Ne4 11.Qe2 Qa5 12.Ne4 de4; 7...Qc7 8.Nc3 0-0 9.0-0 Bd7 10.Bd3 Qa5 11.Ne5 Rad8 12.Qf3 g6; 7...g6 8.Nc3 Bd7 9.0-0 0-0 10.Qd2 Ne4 11.Ne4 de4 12.Bc6 Bc6) 8.Ba4 Qa5 9.Nc3 Ne4 10.Qd3 0-0 11.Bc6 bc6 12.Ne5 Bb7; D4) 7.Nbd2 b6 8.cb6 0-0 9.Bd3 ab6 10.0-0 Qc7 11.Qe2 Bb7 12.a3 h6.

4.a3 d4 5.b5+/– Nb8 (5...Nce7 6.Bd4 Nf5 7.Bb2+/–) 6.Bd4 Nf6 7.Nf3 Bd6 8.Bc4 0-0 (8...Nbd7 9.0-0+=) 9.0-0 (better is 9.Nc3+/–) 9...e5? (better is 9...Nbd7!?+/–) 10.Ne5+- Be5 (10...a6 11.Nc3+-) 11.Be5 Ne4 (11...Bg4 12.Qc1+-) 12.Qf3 Nf6 (12...Nd6 13.Qg3 Nf5 14.Qf4+-) 13.Bf6 Qf6 14.Qf6 gf6 15.Nc3 Be6 16.Bd5 (16.Nd5 Nd7+-) 16...Bd5 (16...c6 17.Bf3+-) 17.Nd5 c6 (17...Nd7+-) 18.Nc7 (worse is 18.Nf6 Kg7 19.Nh5 Kh6 20.bc6 Nc6+-) 18...cb5 (18...Nd7 19.Na8 Ra8 20.bc6 bc6 21.Rfb1+-) 19.Na8 Nc6 (19...Na6 20.Nb6 ab6 21.Rab1+-) 20.Nc7 Ne5 (20...a6 21.d4+-) 21.d4 Ng4 (21...Nc4 22.Nb5 a6 23.Nc3+-) 22.Nb5 Rc8 (22...a6 23.Nd6+-) 23.h3 Nh6 24.Rfc1 Kg7 (24...Ra8 25.c4+-) 25.c4 Nf5 (25...Ra8 26.c5 Nf5 27.Rab1+-) 26.Na7 h5 (26...Ra8 27.Nb5 Rd8+-) 27.Nc8 +-. b4_player – opponent, gamecolony.com, 2007.

4.a3 Bd7 5.Nf3 f5 6.b5 Nce7 (6...Nb8 7.Be2+=) 7.Ne5 (7.Be2 Nf6+=) 7...Ng6 8.d4 (8.c4 Nf6+=) 8...Nf6 (8...Ne5 9.de5 c6 10.bc6 bc6 11.Nd2=) 9.Be2 (9.c4 Bd6+=) 9...Be7 (9...Ne5 10.de5 Ne4 11.0-0=) 10.0-0 Ne5 11.de5 Ne4 12.Nd2 (12.c4 dc4 13.Bc4 a6 14.ba6 b5+= (worse 14...ba6 15.Qh5 g6 16.Qe2+-)) 12...0-0 13.c4 Nd2 (13...c6 14.Rc1=) 14.Qd2+= c6 15.a4 a5 (15...a6 16.ba6 ba6 17.a5+=) 16.f4 (16.Rfd1 Rc8+=) 16...Bb4 (16...Rc8 17.Rac1+=) 17.Qc2 (17.Bc3 Bc3 18.Qc3 b6+=) 17...dc4 (17...Rc8 18.Qb3=) 18.Bc4+= c5 (18...cb5!? 19.ab5 Qe7+=) 19.Rad1 Qe7 20.Rd6 (better 20.e4 Kh8 21.ef5 ef5 22.Rd6+-) 20...Rfd8? (better 20...Rad8!?+-) 21.Qf5+- Rf8?? (21...Re8 22.Qd3 Bc8 23.f5+-) 22.Qc2 (better 22.Rd7 Qd7 23.Be6 Rf7 24.Bd7 Rf5 25.Bf5+-) 22...b6 (better 22...Rad8+-) 23.Rfd1 Rad8 (23...Bc8 24.Rb6 Qf7 25.Qb3+-) 24.Qb3 (24.Qd3 Bb5 25.ab5 Rd6 26.ed6 Qh4+-) 24...Qh4 (24...Bc8+-) 25.Be6 Be6 (25...Kh8 26.g3 Qh5 27.Bc4+-) 26.Qe6 (26.Re6?? c4 27.Qc2 Rd2 28.Qd2 Bd2-+) 26...Kh8 27.Qc4 (27.g3 Rd6 A) 28.gh4? Re6 (28...Rd1?! 29.Kf2=+) 29.Kg2 Kg8-+; B) worse 28.ed6 Qh5 29.Rd5 Qg6+-; C) worse 28.Rd6 Qh5 29.Qe7 Rg8+-; D) 28.Qd6+-) 27...Rd6 (27...Rfe8 28.Qd5 Rd6 29.ed6+- (29.Qd6?! Be1 30.Qd3 Qf2 31.Kh1 Qb2 32.Re1 Qa2+-)) 28.ed6 (28.Rd6?! Qe1 29.Qf1 Qe3 30.Kh1 Qb3+-) 28...Rd8 (28...Qg4 29.Rd5 Qe6+-) 29.Qf7 Qh6 (29...Qg4 30.Rd5 Qg6+-) 30.d7 (30.d7 Qg6 31.Qe7 Rg8 32.d8Q h6 33.Bg7 Qg7 34.Qg7 Kg7 35.Rd7 Kg6 36.Qg8 Kf5 37.Re7 c4 38.Qe6) 1–0. GuestMGFW – Guestfirst, freechess.org, 2017.

4.a3 f6 5.d4 (5.b5 Ne5+=) 5...e5 (better is 5...Nh6!?=) 6.b5+/– Na5 (6...Nce7 7.de5 fe5 8.Be5+/–) 7.de5+- fe5 8.Qh5 g6?? (better is 8...Ke7 9.Nf3 Nf6+-) 9.Qe5 (9.Qe5 Kf7 10.Qh8+-) 1–0. marus – busybee18, internet live, 2001.

4.a3 Nf6 5.Nf3 b6 (5...Bd6 6.Be2=) 6.Nc3 (6.b5 Nb8=) 6...Bb7 (6...a6 7.Be2=) 7.Be2 Bd6 8.0-0 Qe7 (8...0-0 9.Nb5=) 9.Nb5+= 0-0-0 (9...a6 10.Nd6 cd6 11.a4+=) 10.Nd6+/– Rd6 (10...Qd6 11.Bc3+/–) 11.b5 Na5 12.Bc3 Nc4 (12...c5!?+/–) 13.d3 Na5 14.Bb4 c5 15.bc6 Nc6 16.Bd6 Qd6 17.d4 Re8 18.Bd3 Ne4 (18...Kd8 19.Ng5 Qe7 20.c4+- (20.Nh7?! Nh7 21.Bh7 g6+=)) 19.c4 dc4 (19...f5+-) 20.Be4 f5 21.Bc6 Qc6 22.Rc1 b5 23.a4 (23.Qd2 Kd8+-) 23...a6 (23...b4 24.Kh1+-) 24.ab5 ab5 25.Qd2 g5 26.Rfd1 g4 27.Nh4 Rd8 (27...Qd5 28.Qb4+-) 28.Qc2 (28.Qb4 Rd6+-) 28...Qd5 29.Ra1 Kd7 30.Ra7 Ke8 31.Rda1 Kf7 32.R1a5 Kf6 (32...Kg8 33.Qd2 Rd7 34.Qb4+-) 33.Qb2 (better is 33.Qc3+-) 33...Kg5 (33...Rc8 34.Qc1 (34.Rb5?! c3 35.Qe2 c2 36.Rd5 c1Q 37.Qf1 Bd5+/–) 34...Rc7 35.e4 Qd4 36.ef5+-) 34.Rb5 Qe4 (34...c3 35.Qa3 Qd6 36.Rbb7 h6 37.f4 gf3 38.Nf3 Kh5 39.Qc3 Qd5+-) 35.Rbb7 Kh4 (35...h6 36.d5! c3 37.Qc3 Rg8+-) 36.Rh7 Kg5 37.Rag7 Kf6 38.d5 e5 (38...c3 39.Qc3 Qe5 40.Rf7 Kg5 41.Qe5 Rd5 42.Rfg7) 39.Qb6 (39…Rd6 40.Qd6) 1–0. b4_player (1865) – serbkiller (1835), GameColony.com, 2002.

4.b5 Na5 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Na5 4.e3 e6).

4.b5 Nb8 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 e6).

4.b5 Ne5 5.Be5 Qg5 6.Bc7 Nf6 (6...Qe7 7.Bg3+-) 7.Nf3 Qg6 (7...Qf5 8.Bd3 Ne4 9.0-0+-) 8.Ne5 Qf5 9.Nc3 Bb4 (9...Nd7 10.Bd3 Qg5 11.0-0+-) 10.g4 Qg5 (10...Ng4 11.Ng4 Qg5+-) 11.h4 Qh6 12.g5 Qh5 13.Be2 Qe2 14.Qe2 Bc3 15.gf6 (15.dc3 Ne4+-) 15...Ba1 16.Qg4 gf6 17.Qg7 Rf8 18.Bd6 Be5 (18...fe5 19.Qf8 Kd7 20.Qe7) 19.Qf8 Kd7 20.Qe7 1–0. pcmvr (2530) – autocage, net–chess.com, 2006.

4.Bb5 Bd7 5.a3 a6 6.Be2 Nf6 7.Nf3 Be7 (7...Bd6 8.c4=) 8.0-0 (8.c4 0-0=) 8...0-0 (8...b5 9.Ne5=) 9.Ne5 (9.c4 dc4 10.Bc4 Ne4+=) 9...Ne5 10.Be5 Bc6 11.Qc1 (11.Nc3 Nd7 12.Bg3 Nb6+=) 11...Bd6 (11...Nd7 12.Bb2+=) 12.Qb2 White plans b5 12...Be7 (12...Qe7 13.f4=) 13.Qd4 Qd7 14.Nc3 Rfd8 (14...Ne8 15.Qg4=) 15.Rae1 (better is 15.a4 b5 16.ab5 ab5 17.h3+=) 15...a5?? (better is 15...Ne8=) 16.b5+- b6 (16...Ne4 17.bc6 Qc6 18.Nb5+- (18.Bg7?! Bc5 19.Qe5 Bd6+/–)) 17.bc6 Qc6 18.Bb5 (18.Bd3 Qc5+-) 18...Qb7 (18...Qc5 19.Qc5 Bc5 20.Bc6+-) 19.Bd3 (19.Qa4 Qc8+-) 19...Bc5 (19...c5 20.Qh4+-) 20.Qf4 (20.Qh4 Ba3 21.Bf6 gf6+-) 20...Nd7 (20...Bd6 21.Bd6 cd6 22.Rb1+-) 21.Bc7 Re8 22.a4 (22.Nb5!? g6+-) 22...Rac8 23.Bd6 (23.Be5 Bb4 24.Bb5 Ne5 25.Qe5 Red8+-) 23...Qc6 (23...e5 24.Qh4 Bd6 25.Qh7 Kf8 26.Qh8 Ke7 27.Qh4 Kf8+-) 24.Bc5 Nc5 (24...Qc5 25.Rb1+-) 25.Bb5 e5 (25...Qb7 26.Be8 Re8 27.d4+-) 26.Bc6 ef4 27.Be8 Re8 28.Nd5 fe3 (28...Na4 29.ef4 Rd8 30.c4+-) 29.fe3 (29.Re3 Rb8 30.Nb6 f6+-) 29...Na4 30.d3 (30.Rb1 Kf8+-) 30...Nc5 (30...Rd8 31.e4 Rb8 32.Rb1+-) 31.e4 (31.Nb6 Na6+-) 31...a4 (31...Nd7 32.Rb1 Rb8 33.Rb5+-) 32.Rb1 a3 (32...h6 33.Rb6 Ra8 34.Rc6+-) 33.Rb6 Ra8 (33...f5 34.Rc6 Ne6 35.ef5+-) 34.Rfb1 g6 (34...Nd7 35.Rb7 Nf8 36.Ra1+-) 35.Rb8 Rb8 36.Rb8 Kg7 37.Rb1 1–0. Dopey (1960) – vlad (1820), ICS rated blitz match, 1998.

4.c4 Bd7 (better 4...Nb4!? 5.a3 Nc6-/+) 5.b5= Nce7 6.cd5 ed5 7.Nf3 Nf6 (7...c5 8.Be2=) 8.Bd3 (8.Bf6 gf6 9.Nc3 Rg8+=) 8...c6 (8...Ng6 9.Bd4=) 9.Qe2 (9.Bf6 gf6 10.bc6 bc6+=) 9...cb5 (9...Ng6 10.0-0=) 10.0-0 (better 10.Bf6 gf6 11.Bb5+=) 10...g6?? (10...Nc6 11.Bb5 Rc8 12.Ne5=) 11.Nc3 (better 11.Bf6 Rg8 12.Nc3+-) 11...Bg7+= 12.Nd5?? (better 12.Nb5 0-0 13.Rfc1+=) 12...Nfd5?? (better 12...Ned5 13.Bb5 0-0-+) 13.Bg7+- Rg8 14.Bb2 Qc7 (14...a6 15.Nd4+-) 15.Rac1 (15.Bb5 Bb5 16.Qb5 Qd7 17.Qd7 Kd7+-) 15...Qb6 (15...Qa5 16.Nd4+-) 16.Bd4 Qa6 (better 16...Qa5+-) 17.Bb5?? (better 17.Rc5+-) 17...Qf6 (better 17...Bb5 18.Qd1 Bf1 19.Qf1 Qf1 20.Kf1 Nc6-+) 18.Bd7+- Kd7 19.Ne5 (better 19.Bf6 a6 20.Qd3+-) 19...Ke6 (19...Kd8 20.Qb5 Qe6 21.Nf7 Qf7 22.Qb7+-) 20.g4 (better 20.e4!? Nb6 21.Qg4 Nf5+-) 20...Qg7 (20...Qh4 21.e4 Nb6 22.f4+-) 21.Nc4 (better 21.e4 Nb6 22.Qf3+-) 21...Qf8 (21...f6 22.Na5 Nf5 23.Qf3+- (23.gf5?? gf5 24.Qg4 Qg4 25.Kh1 Qg2)) 22.g5 Rc8?? (22...f5+-) 23.Qg4 Nf5 24.f4 (better 24.Qe4 Kd7 25.Qd5 Nd6 26.Nd6 Qd6 27.Qf7 Qe7 28.Qd5 Qd6 29.Qb7 Rc7 30.Rc7 Qc7 31.Qd5 Qd6 32.Qg8+-) 24...h6?? (better 24...b5+-) 25.e4 (25.Ba7?! Qb4 26.d3 b5+-) 25...hg5 (25...Nde7+-) 26.ef5 Ke7 27.fg5 (27.f6 Nf6 28.Rfe1 Ne4 29.Re4 Kd8 30.Qc8 Kc8 31.Nb6 Kb8 32.Be5 Qd6 33.Bd6) 27...Qe8 (27...Kd8+-) 28.Qe4 Kd7 29.Qd5 Ke7 30.Ne5 (30.Qd6) 30...Kf8 31.Qd6 (31.Nd7 Qd7 32.Qd7 Re8 33.Qd6 Re7 34.Rc8) 31...Kg7 32.f6 (32.fg6 fg6 33.Qd7 Qd7 34.Nd7 Kh7 35.Rf7 Rg7 36.Rg7 Kh8 37.Rc8) 32...Kh7+- 33.Rf3 (better 33.Qa3 Qe6 34.Qg3+-) 33...Rc1 34.Kg2 Rc8 (34...Rf8 35.Rh3 Kg8+-) 35.Rh3 1–0. Agiant – KingCharlotte, lichess.org, 2019.

4.Nf3 Bb4?? 5.Bg7+- Nf6 6.Bh8 Ne4 (6...Qe7 7.Ng5 e5 8.Nc3 Bc3 9.dc3+-) 7.Bb5 Ke7 (7...f6 8.a3 Ba5 9.Nd4+-) 8.Bb2 a6 (8...Bd7 9.a3 Bd6 10.Nc3+-) 9.Bc6 bc6 10.Ne5 Bb7 (10...Qe8 11.Qh5 Rb8 12.Nc3 Nc3 13.Bc3 Bc3 14.dc3+-) 11.Qh5 Nf6 (11...Qg8 12.f3 f6 13.fe4 fe5+-) 12.Qf7 Kd6 13.Qg7 c5 14.Nf7 Kc6 15.Nd8 Rd8 16.Qf6 Bc8 17.Qd8 Bb7 18.Be5 c4 (18...Ba5 19.Na3 d4 20.Rb1 Bc8 21.Qc8 Kd5 22.Bg3 Bd2 23.Kd2 de3 24.Ke3 c4 25.Rhd1 Kc5 26.Qc7) 19.Qc7 Kb5 20.a4 1–0. pierre – tuwyz, internet, 2010.

4.Nf3 Nb4 5.Nc3 Nf6 6.a3 Nc6 7.d4 Ne4 (7...Bd6 8.Bd3-/+) 8.Ne4 de4 9.Nd2 e5 (better is 9...f5!?+=) 10.de5+= Ne5?? (better is 10...Bf5 11.g4 Bg6=) 11.Be5+- Bd6 (11...Qe7 12.Bd4+-) 12.Bd6 (12.Bg7 Rg8 13.Bc3 Bf5+-) 12...cd6 (12...Qd6 13.Ne4 Qc6 14.Qd4+-) 13.Ne4 d5 14.Nc3 (better is 14.Bb5 Kf8 15.0-0 Be6+-) 14...d4 (14...0-0 15.Qd5 Be6 16.Qd8 (16.Qb7?! Qf6 17.Qb4 Rfc8+-) 16...Rfd8 17.Bd3+-) 15.Bb5 Bd7 (15...Kf8 16.0-0+-) 16.Qd4 a6 (16...Bb5 17.Qg7 Rf8 18.Qe5 Qe7 19.Qb5 Qd7 20.Qg5+-) 17.Qg7 Ke7 (17...Rf8 18.Bd7 Qd7 19.Rd1+-) 18.Qe5 (better is 18.0-0-0 ab5 19.Qe5 Be6+-) 18...Be6 19.Rd1 Qa5 20.Rd7 Ke8 (20...Kf8 21.Qh8) 21.Qh8 1–0. vik – dank, internet live, 2001.

4.Qg4 f6 5.Qh5 (5.a3!?=) 5...g6-/+ 6.Qg4 (6.Qd1 Bb4 7.a3 Bd6-/+) 6...e5 7.Qf3 (7.Qd1 Bb4 8.Nf3 Nge7-/+) 7...Nb4 8.Qd1 Ne7 9.c3 Nbc6 10.Qf3 (10.d3 Bg7-/+) 10...Bg7 11.e4 (11.d3 d4-+) 11...0-0 12.ed5 Nd5 13.Bc4 Nce7 (13...Be6!? 14.Bb3-+) 14.Ba3-/+ c6 15.Ne2 (15.Be7 Qe7 16.Bd5 cd5 17.Qd5 Be6-/+) 15...Be6 16.0-0 b5 17.Bb3 f5 18.c4?? (better 18.d4-/+) 18...e4-+ 19.Qg3 Ba1 (better 19...bc4 20.Nbc3 cb3 21.ab3 f4 22.Be7 fg3 23.Bd8 gf2 24.Rf2 Rf2 25.Kf2 Rd8 26.Ra7 e3 27.de3 Bc3 28.Nc3 Nc3-+) 20.cd5 cd5 (20...Bd5 21.Nbc3 Bc3 22.Qc3 Bb3 23.ab3-+) 21.d4 (21.Nf4 Bf7 22.Nc3 Bc3 23.dc3-+) 21...Rc8 (better 21...ed3 22.Qd3 Bf6-+) 22.Nd2 f4! 23.Qg5 (23.Nf4 Bd4 Deflection) 23...Rf5 (23...b4 24.Bb4 Nc6 25.Qd8 Rfd8 26.Bc5-/+) 24.Qh4? (24.Qe7 Qe7 25.Be7 f3 26.gf3 ef3+=) 24...e3?? (24...b4 25.Bb4 Nc6 26.Qd8 Rd8 27.Ra1-+) 25.Nf3? (25.Be7 g5 26.Bd8 gh4 27.Ra1 Rd8 28.fe3 fe3+/-) 25...ef2 (25...b4 26.Bb4 Nc6 27.Qd8 Rd8= (worse 27...Nd8 28.Ra1 g5 29.fe3+-)) 26.Kf2= Rh5?? (26...Nc6 27.Ra1 Qh4 28.Nh4 Rf6+=) 27.Qf6 Rc7?? (better 27...Qd7 28.Nf4 Rf5 29.Qe6 Qe6 30.Ne6 Bc3 31.Be7 Kf7+-) 28.Ng5 (28.Qe6 Kh8+-) 28...Bf5?? (better 28...Rg5 29.Ra1 Nc6 30.Qe6 Kg7+/-) 29.Qf7 Kh8 30.Nf4 (better 30.Bd6! Qd6 31.Qf8 Ng8 32.Qd6+-) 30...Bd4-+ (30...Rg5 31.Qf6 Kg8 32.Bd5 Qd5 33.Nd5 Bd4 34.Qd4 Nd5 35.Qd5 Rf7 36.Kg1+-) 31.Ke1 Bc3 32.Ke2 (32.Ke2 Rg5 33.h3-+). felixrbran – hechmi, Rated Classical game, lichess.org, 2013.

5.b5 Na7 6.Nf3 a4 (6...Nf6 7.Be2=) 7.c4+= dc4 8.Bc4 b6 (8...Bd7 9.Nc3+=) 9.Nc3 Bd7 (9...Bb7 10.Na4 Nf6 11.d3+/–) 10.0-0 Nf6 11.Ne5 Bd6 12.f4 0-0 13.Qf3 Nc8?? (better is 13...Qe8 14.Nd7 Qd7+/–) 14.Qa8+- Nd5 (14...Ne7 15.Qd8 (15.Nd7?! Qa8 16.Nf8 Kf8+/–) 15...Rd8 16.Nd7 Nd7 17.Na4+-) 15.Nd7 Qd7 16.Nd5 ed5 17.Qd5 Ne7 18.Qg5 White prepares f5 18...Ng6 19.f5 Be7 20.Qh5 (20.fg6?! Bg5 21.Rf7 Rf7+-) 20...Nh4 (20...Nh8 21.Qg4 g5 22.Qe4+-) 21.f6 Bf6 22.Bf6 Ng6 23.Bd4 (23.Bc3 Qe8+-) 23...Qe7 24.Rf3 Kh8 25.Rh3 h6 26.Qh6 Kg8 27.Qg7 1–0. marre – oppo12, internet, 2010.

5.b5 Nce7 6.f4 Nf5 7.Nf3 Nf6 8.Be2 b6 9.0-0 Bd6 10.c4 d4? (better 10...dc4!? 11.Bc4 0-0+=) 11.Nd4+/- (11.Bd4?! Bf4 12.Nc3 Ng4+=) 11...Nh4? (better 11...Nd4 12.Bd4 0-0+/-) 12.Nc6 Qe7 (12...Qd7 13.Ne5 Qd8+-) 13.Ne7 Ke7 14.Nc3 (14.Qe1 Ng6+-) 14...Bb7 15.Bf3 (15.g3 Nf5+-) 15...Bf3 (15...Nf3 16.gf3 Rhg8 17.Ne2+-) 16.gf3 Rhd8 17.Qe1 Nf5 18.e4 (18.Na4 Nd7+-) 18...Nd4 (18...Bc5 19.Kh1 Nd4 20.e5+-) 19.e5 (19.Nd5 ed5 20.Bd4 de4 21.fe4 Bc5 22.Bc5 bc5+-) 19...Bc5 20.ef6 gf6 21.Kg2 (21.Kh1 Nc2 22.Qh4 Na1 23.Ra1 Bd4+-) 21...Nc2 22.Qe4 Rd2 23.Kg3 (23.Kh3 Rad8 24.Nd5 R8d5 25.cd5 Na1 26.de6 Rb2 27.Qh7 Rd2 28.Qf7 Kd8 29.Rg1 Kc8 30.Rg8 Kb7 31.Qe8 Bf8 32.Qc6 Ka7 33.Qc7 Ka8 34.Rf8 Rd8 35.Rd8) 23...Rad8 (23...Rg8 24.Kh3 Rgg2+-) 24.Nd5 Kd6 (24...R8d5 25.cd5 Na1 26.de6+-) 25.Nf6 (better 25.Bf6!? Rg8 26.Kh3 Rd5+-) 25...Ne3 (25...Ke7 26.Qb7 Na1 27.Ba1+-) 26.Be5 (better 26.Qc6 Ke7 27.Qc7 Kf8 28.Nh7 Ke8+-) 26...Ke7 27.Rg1 Nf5 (27...Nc2 28.Rad1! Rd1 29.Rd1+-) 28.Kh3 R8d3 (28...Bd4 29.Qc6 Ba1 30.Ba1+-) 29.Ng8 (better 29.Qc6 Rd7 30.Rad1 Rh2 31.Kh2 Rd2 32.Rd2 Bg1 33.Kg1 Nd6 34.Rg2 h5 35.Qc7 Kf8 36.Qd6) 29...Kd7 30.Qc6 Kd8 31.Qc7 Ke8 32.Nf6 Kf8 33.Rg8 1-0. Nf3 (1875) - uxim (1915), Rated Classical game, lichess.org, 2013.

5.Nf3 a5 6.c4 (6.b5!? Nce7 7.Bd3+=) 6...ab4= 7.ab4 Ra1 8.Ba1 Bb4?? (better 8...Nb4 9.Bc3 c6=+) 9.Bg7+- Nge7 (9...Nf6 10.Bh8 Ke7 11.Bf6 Kf6 12.Qb3+-) 10.Bh8 Qd6 (10...Ng6 11.Bc3+-) 11.Bc3 (11.Nc3 Qc5+-) 11...Bc5 (11...e5 12.Qa4 f6 13.Bb4 Qb4 14.Qb4 Nb4 15.Nc3+-) 12.cd5 (12.d4!? Bb4 13.c5 Qd8+-) 12...ed5 13.Nd4 (better 13.Qa4!? Qg6 14.d3 Bd7+-) 13...Nd4 14.Bd4 Bb4 (14...Bd4 15.ed4 Qf4 16.Bd3+-) 15.Nc3 c5 16.Bg7 Nc6 (16...Nf5 17.Nb5 Qc6 18.Be5+-) 17.Qh5 Be6 (17...Bc3 18.Bc3 Qe6 19.Bd3+-) 18.Qh7 (18.Be2 Na5+-) 18...Qe7 (18...Kd7 19.Be2+-) 19.Qh8 (19.Qh5 Qd8 20.Be2 d4+-) 19...Kd7 20.Bf6 Qd6 (20...Qe8+-) 21.Be5! Qe7 (21...Ne5 22.Bb5 Pinning; 21...Qe5 22.Qe5 Combination) 22.Bf6 Qd6 23.Be2 Bc3 (23...c4 24.Bf3+-) 24.dc3 d4 25.cd4 cd4 26.Bd4 (26.ed4?? Qb4 27.Kd1 Bb3 28.Kc1 Qc3 29.Kb1 Qc2 30.Ka1 Qa2) 26...Nd4 (26...Bc4 27.Bg4 Ke7 28.Qh4 Ke8 29.Bf6 Qb4 30.Kd1+-) 27.Qd4 (27.ed4?? Qb4 28.Kd1 Bb3 29.Kc1 Qc3 30.Kb1 Qc2 31.Ka1 Qa2) 27...Bd5 (27...b6 28.Qd6 Kd6 29.h4+-) 28.Bf3 Ke6 29.Bd5 Qd5 30.Qd5 Kd5 31.Ke2 (31.h4 f5+-) 31...Kc6 32.Rb1 (32.Rd1 Kc5 33.h4 f6 34.h5 Kc4 35.h6 Kc5 36.h7 Kb5 37.h8Q Kc5 38.Qc8 Kb6 39.Rb1 Ka5 40.Qa8) 32...b6 33.h3 (33.Rd1 Kc5 34.h4 b5 35.h5 Kb4 36.h6 Kc5 37.h7 Kb6 38.h8Q Ka5 39.Qf6 b4 40.Ra1 Kb5 41.Qa6 Kc5 42.Ra5) 33...b5 34.h4 (34.Rd1 f5 35.h4 Kb6 36.h5 Kc5 37.h6 b4 38.h7 Kb5 39.h8Q Kc4 40.Qe5 f4 41.Qd5 Kc3 42.Qd3 Kb2 43.Rb1 Ka2 44.Qb3) 34...b4 35.h5 b3 (35...Kc5 36.h6 Kc6 37.h7 f6 38.h8Q Kc7 39.Rb4 f5 40.Qh7 Kd6 41.Rb6 Kc5 42.Qb7 f4 43.Qc6) 36.h6 Kc5 (36...f6 37.Rb3 Kd5 38.h7 Ke6 39.Rb6 Kd7 40.h8Q f5 41.Qh7 Kc8 42.Rb7 Kd8 43.Qd7) 37.h7 Kc4 (37...Kb5 38.h8Q Kb6 39.Qc3 b2 40.Rb2 Ka7 41.Qa5) 38.Rb3! Kb3 39.h8Q f6 (39...Kc4 40.Qh5 Kb4 41.Kd3 f6 42.Qf5 Kb3 43.Qb5 Ka3 44.Kc3 f5 45.Qb3) 40.Qg7 (40.Qf6 Kc2 41.Qg6 Kc3 42.Qc6 Kb4 43.Kd2 Ka5 44.Qb7 Ka4 45.g4 Ka5 46.Kc3 Ka4 47.Qb4) 40...f5 41.Qf7 Kb4 42.Qf5 (42.Qf5 Kc4 43.g4 Kb3 44.Kd3 Kb4 45.Qe5 Kb3 46.Qb5 Ka3 47.Kc3 Ka2 48.Qb2) 1–0. Fettito – Carrick16, lichess.org, 2018.

5.Nf3 h6 6.c4 dc4 7.Bc4 Bd7 8.0-0 Na7 (8...Nf6 9.d4+=) 9.Ne5 Bb5 (9...Nc6 10.Nd7 Qd7 11.Qf3+=) 10.Be2 (better 10.Qf3!? Nf6 11.Qb7+-) 10...Be2+= 11.Qe2 Qd5 (11...Nf6 12.d3+=) 12.d4 0-0-0?? (better 12...Nf6+-) 13.Nc3+- Qd6 (13...Qb3 14.Nf7 Rh7 15.Nd8 Kd8 16.Rab1+-) 14.b5 (14.Nf7!? Qd7 15.Nh8 Nf6+-) 14...Nb5 (14...Rd7 15.a4 c5+-) 15.Nb5 ab5 16.Nf7 (16.Qb5?! Qe7+-) 16...Be7 (16...Qd7 17.Nh8 Qe8+-) 17.Nh8 1–0. GuestCMWC – GuestRDBJ, freechess.org, 2017.

5.a3+- Nc2 6.Qc2 b6 7.Nf3 Bb7 8.Ne5 (8.Bd3 Nf6+-) 8...Qd6 (8...Ne7 9.d4+-) 9.Nc6 (9.Bd3 Ne7+-) 9...Bc6 10.bc6 (10.Be5 Qc5 11.Qc5 bc5 12.bc6 a6+-) 10...f6 (10...a6 11.Qa4 Ne7 12.Ba6 Nc6 13.Qb5+-) 11.Ba6 Be7 (11...Rb8 12.Nc3+-) 12.Nc3 Qc6 (12...Qd8+-) 13.Bb5 (13.Bb5 Qd7 14.Bd7 Kd7 15.Qa4 c6 16.Nd5 ed5 17.Qg4 Kd6 18.Qg7+-) 1–0. DEFFM – GuestSLHH, freechess.org, 2018.

5.a3+- Nc2 6.Qc2 Nf6 7.Nf3 Bd6 8.Be2 0-0 9.0-0 c6 (9...Qe7 10.Ne5+-) 10.a4 (10.bc6 bc6 11.Be5 Rb8+-) 10...cb5 (10...Bd7 11.bc6 Bc6 12.Nc3+-) 11.ab5 Bd7 12.Nc3 e5 (12...Qb6 13.Na4 Qd8 14.Bd4+-) 13.h3 (13.d4 e4 14.Ne5 Re8+-) 13...e4 14.Nd4 Qc7 (14...Qe7 15.f4+-) 15.Rfc1 Bh2 (15...Qd8 16.f4+-) 16.Kh1 Ng4 (16...Be5 17.Nd5! Qc2 18.Ne7 Kh8 19.Rc2 Rfe8+-) 17.Bg4 Bg4 18.hg4 Be5 19.Nd5 Qd6 (19...Qc2 20.Rc2 Rfd8+-) 20.Qc7 (better is 20.Nf5 Qe6 21.b6+-) 20...Qh6= 21.Kg1 Qh2 22.Kf1 Rae8?? (better is 22...Bc7 23.Rc7 Qh1 24.Ke2 Qg2 25.Rb7 Qg4 26.Ke1 Qg1 27.Ke2 Qg4 28.Ke1 Qg1 29.Ke2 Qg4=) 23.Qb7+- Qh1 24.Ke2 Qg2 25.Rg1 Qh3 26.Qa7 Bd4 (26...h6 27.Qd7 Bh2 28.Rgf1+-) 27.Bd4 Qh6 28.Ne7 Kh8 29.Rac1 (better is 29.Nf5 Qg6 30.Bg7 Qg7 31.Ng7 Kg7 32.Rh1+-) 29...Qf6 30.Nf5 (30.Bf6 Rd8 31.Qa1 Rd2 32.Ke1 h5 33.Bg7 Kh7 34.Bf8 f6 35.Kd2 h4 36.Qf6 h3 37.Qh6) 30...Qg6 31.Bg7 Kg8 32.Qa1 Re5 33.Nh6 1–0. burschi – Nautiluschess, ICS, 1999.

5.a3+- Nc2 6.Qc2 Nf6 7.Nf3 Bd6 8.Be2 Bd7 9.Ng5 (better 9.Be5+-) 9...0-0?? (9...c6 10.Nc3+-) 10.f4 (better 10.Bf6 g6 11.Bd8 Rfd8 12.Nc3+-) 10...g6 11.Nf3 c6 12.a4 c5 13.Nc3 (13.0-0 Be7+-) 13...c4 14.0-0 Ne8 (14...a6 15.Ne5+-) 15.Nd4 f6 16.Bg4 (better 16.d3 cd3 17.Qd3+-) 16...Bb8?? (16...Nc7+-) 17.Ne6 Be6 18.Be6 Kg7 19.Bd5 Qc7 (19...Nd6 20.Ne4 Qc8 21.Rac1+-) 20.Rfc1 (20.Ba3 Rh8+-) 20...g5 (20...Nd6 21.Ne4 Qc8 22.Bc4+-) 21.Be4 (better 21.Ne4 Kh6 22.Rf1 c3 23.Qc3 gf4+-) 21...gf4 22.Nd5 Qd6 (22...Qc8 23.Ba3 Rf7 24.Bf5+-) 23.Nf4 (better 23.Ba3 Qe6 24.Bf8 Kf8 25.ef4+-) 23...a6 (23...Qe7 24.Rf1 Kh8 25.Qc4+-) 24.Nh5 (24.Ba3 Qb6 25.Bc5 Qa5 26.Ne6 Kh8 27.Bf8 ab5 28.Bh7 Bh2 29.Kh1 Qc3 30.Qg6 Qc1 31.Rc1 ba4 32.Qg8) 24...Kh6 (24...Kh8 25.Bb7 Qh2 26.Kf2 Qh4 27.Ke2+-) 25.Ng3 ab5 (25...Qd7 26.Nf5 Kg5+-) 26.ab5 (better 26.Nf5 Kh5 27.Bf3 Kg6 28.Nd6 Kg7 29.Nf5 Kh8 30.ab5 Ra1 31.Ba1 Nd6+-) 26...Ra1 27.Ba1 (better 27.Nf5 Kg6 28.Nd6 Kg5 29.h4 Kh4 30.Nf5 Kg5 31.Ba1+-) 27...f5 (27...Ng7 28.Bh7 f5 29.Bf5+-) 28.Bf3 (28.Bb7 Qd7 29.Bc6 Qd3+-) 28...Ng7 (28...Qd3 29.Nh5 f4 30.Qc4 Qc4 31.Rc4 fe3 32.de3+-) 29.Qc4 (better 29.Bg7 Kg7 30.Nf5 Rf5 31.Qf5 Qh2 32.Kf2 Qh4 33.Ke2+-) 29...Nh5 (29...f4 30.Ne4 Qe7+-) 30.Nh5 (better 30.Qh4!? Qg6 31.Nh5 Qg5+-) 30...Qh2 31.Kf2 Qh4 32.Ke2 (32.Qh4 Be5 33.Nf4 Kg7 34.Qg5 Kh8 35.Be5 Rf6 36.Bf6) 32...Qc4+- 33.Rc4 Re8 (33...Kg6 34.Ng7 Bd6 35.Bb7+-) 34.Nf6 (better 34.Ng7!? Be5 35.Ne8 Ba1 36.Bb7 Kg6+-) 34...Re6 35.Rh4 (better 35.g4 Rb6 36.gf5 Kg5 37.Nh7 Kf5+-) 35...Kg7 36.Nh7 (better 36.Nd7 Kg6 37.Nb8 Re7+-) 36...Kf7 37.Ng5 Ke7 38.Ne6 Ke6 39.Bd4 f4 1–0. Akrapovik (1610) – reimoro (1680), lichess.org, 2020.

5.a3+- d4 6.ab4 Bb4 7.Bd4 Nf6 8.Nf3 Ne4 (8...0-0 9.Nc3+-) 9.Bg7 Nf2 (9...Rg8 10.Bd4 b6+-) 10.Kf2 Rg8 11.Bd4 Qd5 12.Nc3 Bc3 13.dc3 e5 (13...Bd7 14.c4 Qh5 15.Qd2+-) 14.Ne5 Bg4 15.Ng4 Qf5 16.Qf3 (16.Qf3 Qg4 17.Qb7 Qf5 18.Ke1+-) 1–0. Janek – Visair, internet, 2019.

5.a3+- Qd7 6.ab4 Bb4 7.Bg7 Ne7 (7...Nf6 8.Bh8 Qe7 9.Nc3+-) 8.Bh8 f6 (8...Ng6 9.Bb2+-) 9.Bf6 Qd6 10.Qh5 Ng6 11.Qh7 Nf8 12.Qh5 Kd7 13.Nf3 Qc5 14.Qf7 Kd6 (14...Qe7 15.Ne5 Kd8 16.Qf8) 15.Qe7 1–0. Janek – Indy, internet free game, 2017.

5.a3+- Nf6 6.ab4 Bb4 7.Bd3+-.

5.a4 Ng6 6.Nf3 Nf6 7.c4 Bb4 8.Be2 dc4 9.Bc4 Ba5 (9...0-0 10.0-0=) 10.0-0+= Bd7 11.Be2 (11.Ne5 Ne5 12.Be5 Rc8+=) 11...0-0 12.d4 Qe7 (12...c6 13.Nbd2+=) 13.Nbd2 Bb4 14.Nc4 Bd6 (14...c6 15.Nce5+=) 15.Nd6 cd6 16.Qb3 Ne4 17.Rac1 Rab8 (17...Rfc8 18.Bd3 d5 19.Ba3+=) 18.Bd3+- d5? (better 18...f5+-) 19.Ba3+- Nd6 (19...Qe8 20.Bf8 Nf8 21.Be4 de4 22.Ne5+-) 20.Ne5 (better 20.Qb4 Bb5 21.ab5 Rfd8+-) 20...f6?? (better 20...Bc8+-) 21.Ng6 hg6 22.Qb4 (22.Bg6?! Be8 23.Bd3 Qd7+-) 22...a5 (22...Bb5 23.ab5 Rfd8+-) 23.Qd6 Qd6 24.Bd6 Rbc8 (24...e5 25.Bb8 Rb8 26.de5 fe5 27.Bg6+-) 25.Bf8 Rc1 26.Rc1 Kf8 27.Bg6 Ke7 28.Bd3 (better 28.Rc7 b6+-) 28...Kd6 29.f4 e5 (29...b6 30.e4 de4 31.Be4+-) 30.g3 (30.g3 ed4 31.ed4+-) 1–0. BeepBeepImAJeep (2615) – hassan624 (1650), lichess.org, 2017.

5.c4 b6 6.Nf3 Nf6 7.Nc3 dc4 8.Bc4 Ned5 (8...Bb7 9.0-0+-) 9.0-0 (9.Nd5 ed5 10.Bd3 Bd6+-) 9...Bd6 10.Nd5 ed5 11.Bf6 Qf6? (better 11...gf6 12.Be2 a6+-) 12.Bd5+- Rb8 13.Bc6 Bd7 14.Bd7 Kd7 15.Nd4 Ke8 (15...Rbe8 16.f4+-) 16.Nc6 Rc8 17.d4 Qg6 (17...Qh4 18.f4 Kf8 19.Qd3+-) 18.Qf3 Kf8 (18...Qf6 19.Qg4 Qe6 20.Qg7+-) 19.e4 f6 (19...a5 20.e5 Be7 21.Rac1+-) 20.e5 Be7 21.Na7 (better 21.Rfe1 f5 22.e6+-) 21...Ra8 (21...Re8+-) 22.Qa8 Qe8 23.Qd5 (better 23.Qb7 fe5 24.Rac1+-) 23...g6 (23...fe5 24.de5 g6+-) 24.Rac1 Kg7 25.Rc7 Rf8 26.Nc6 Rf7 27.e6 Rf8 28.Re7 Qe7 29.Ne7 (29.Ne7 h5 30.Nc8 Rg8 31.Qd7 Kh6 32.e7 Rg7 33.e8Q Rd7 34.Qd7 f5 35.Qe7 f4 36.h4 f3 37.Rc1 fg2 38.Nb6 g5 39.Rc6) 1–0. GuestYJNH – GuestLQNB, freechess.org, 2019.

5.c4 c6 6.a4 Nf6 7.Nf3 h6 (7...Ng6 8.bc6 bc6 9.cd5 ed5 10.Qc2=) 8.Bf6+= gf6 9.Nc3 Bg7 (9...Rg8 10.c5=) 10.d4+= Bd7 11.Be2 Qc7 (11...dc4 12.Bc4 cb5 13.ab5+-) 12.0-0 (12.Rc1 dc4 13.Bc4 Rg8+=) 12...f5 (12...dc4 13.Bc4 Rc8 14.Ne4+=) 13.Rc1 (better 13.cd5 cd5 14.Qd2+-) 13...e5? (better 13...dc4 14.Bc4 Rg8+=) 14.bc6 (14.cd5 ed4 15.ed4 c5+-) 14...bc6 15.cd5 (15.de5 dc4 16.Bc4 a6+-) 15...e4 16.Nb5! Qb6 (16...cb5 17.Rc7 Pinning (17.Rc7 Deflection; 17.Rc7 Clearance)) 17.Nd6 (17.dc6 Bc6 18.Nd2 Qd8+-) 17...Kf8 18.Ne5 (18.Nc4 Qd8 19.d6 Nd5+-) 18...Be5 19.de5 cd5 20.Rb1 Qc7 (20...Qa5 21.Bb5 Be6+-) 21.Rb7 Qd8 22.Qd4 Nc6?! (22...Be6+-) 23.Qd5 Be6 (23...Rh7+-) 24.Rf7 (24.Rf7 Kg8 25.Qe6 Qd6 26.ed6 Ne5 27.Ra7 Kf8 28.Qf6 Ke8 29.Qh8) 1–0. Janek – Vaczlav, internet, 2018.

5.Nf3 b6 6.Bd3 h6 (6...a6 7.a4+=) 7.0-0+= Bb7 8.Ne5 Qd6?? (better 8...Nf6+=) 9.Qh5 (9.Nf7 Kf7 10.Qh5 g6 11.Qf3 Nf5 12.Bh8 Bg7 13.Bg7 Kg7 14.Bf5 ef5+-) 9...g6 (9...Nf6 10.Qf7 Kd8 11.f4+-) 10.Ng6! fg6 (10...Ng6 11.Bg6) 11.Bg6 Ng6 12.Qg6 Kd7 13.Bh8 Ne7 14.Qf7 Re8 15.f4 Qc5 (15...Kd8 16.Nc3+-) 16.Nc3 Kd8 (16...a6 17.a4+-) 17.Qe6 h5 (17...Bc8 18.Qf7+-) 18.f5 Bc8 (18...Nc8 19.Bf6 Be7 20.Bd4+-) 19.Qf7 h4 20.Qh5 c6 (20...Bf5 21.Rf5 Nf5 22.Qf5+-) 21.Bd4 Qd6 22.f6 Ng8 (22...Nf5 23.f7 Re7 24.Rf5 Bf5 25.Qf5 Qe6+-) 23.Qe8! Ke8 Decoy theme: e8 24.f7 A double attack (24.f7 Kd7 25.fg8Q+-) 1–0. DEFFM – GuestBHHQ, freechess.org, 2020.

5.Nf3 b6 6.d4 Nf6+= 7.Bd3 (7.Nc3 a6+=) 7...h6 (7...a6 8.Ne5=) 8.0-0 g5 (8...a6!?+=) 9.c4 (9.Nc3 Bg7+-) 9...Bg7 10.cd5 (10.Nbd2 a6+-) 10...Nfd5 11.e4 (11.Qe2 0-0 12.Nc3 Bb7+-) 11...Nf6 (11...Nf4 12.Bc4+=) 12.d5 (better 12.Qb3!?+-) 12...ed5+= 13.ed5 (better 13.Nbd2+=) 13...Nfd5?? (better 13...0-0=) 14.Bg7+- Rg8 15.Bd4 (better 15.Bb2 Bb7 16.Bh7 Kf8+-) 15...f5 (15...g4 16.Ne1 Nf4+-) 16.Re1 c5 (16...Kf8 17.Nc3 g4 18.Ne5+-) 17.bc6 Qd6 (17...Kf8 18.Bc4 Nf4 19.Ne5+-) 18.Bb5 (better 18.Nc3 Kf8+-) 18...Kf8 (18...a6 19.Bc4 g4 20.Bd5 Qd5 21.Ne5+-) 19.Nc3 (better 19.Bb2 Rg6 20.Ba3 Nb4 21.Qd6 Rd6 22.Bb4 Re6+-) 19...a6 (19...g4 20.Nh4 Be6 21.Bf6+-) 20.Nd5 Nd5 (20...Qd5 21.Ba4 g4 22.Ne5+-) 21.Bc4 b5 22.Bd5 Qd5 23.Bg7! Rg7 (23...Kg7 24.Qd4 Double attack (24.Qd5 Discovered attack; 24.Qd4 Decoy); 23...Rg7 24.Qd5 Discovered attack) 24.Qd5 (24.Qd5 Rf7 25.c7 Bb7 26.Qb7 Rc7 27.Qc7 Re8 28.Re8 Ke8 29.Rd1 Kf8 30.Rd8) 1–0. GuestXJBP – GuestQCJN, freechess.org, 2020.

5.Nf3 c6 6.a4 cb5 7.ab5 b6 8.Be2 Bb7 9.0-0 Nc8 10.c4 (10.Ne5 f6 11.Nf3 Bd6+-) 10...Nf6 (10...dc4 11.Bc4 Nf6 12.d3+=) 11.cd5+- Bd5 12.Nc3 Bb7 13.Nd4 Bc5 14.Nc6 (14.Bf3 Qc7 15.Rc1 Qd7+-) 14...Bc6 (14...Qc7 15.f4+=) 15.bc6+- 0-0 16.d4 (16.Ba6 Ne8+-) 16...Bd6 (16...Bb4 17.Qa4 Bc3 18.Bc3+-) 17.Qc2 (17.Ba6 Bc7 18.f4 Nd5+-) 17...Qc7 (17...Ne7 18.Nb5 Bc7 19.Ra6+-) 18.Nb5+- Bh2? (better 18...Qe7+-) 19.Kh1 Qb8 20.c7 Bc7 (20...Qb7 21.Ba3 Re8 22.Kh2+-) 21.Nc7 (21.Qc7?! a5 22.Ba3 Re8+-) 21...Qb7 (21...a5 22.Na8 Qa8 23.Bf3+-) 22.Na8 (better 22.Ba6 Qb8 23.Ba3 Rd8+-) 22...Qa8 23.Bf3 Qb8 24.Ba3 Nd5 (24...Rd8+-) 25.Bf8 Kf8 26.Qh7 Nce7 (26...Nde7 27.Ra6+-) 27.Bd5 ed5 28.Qh8 Ng8 29.Qh2 (better 29.Ra6 Qc7+-) 29...Qb7 (29...Qh2 30.Kh2 Nf6 31.Ra7 Ne4+-) 30.Rfc1 Nh6 31.Ra7 Qa7 (31...Kg8 32.Rb7 Kh7 33.Rf7 Kg6 34.Qg3 Ng4 35.Qg4 Kf7 36.Qf5 Ke7 37.Rc7 Kd6 38.Qe5) 32.Rc8 Ke7 33.Qe5 Kd7 34.Qe8 Kd6 35.Rc6 1–0. DEFFM – GuesFLHD, freechess.org, 2018.

5.Nf3 c6 6.a4 cb5 7.ab5 b6 8.Be2 Nf6 9.0-0 g6?? (9...Ng6 10.d4+=) 10.d3 (better 10.Bf6 Rg8 11.d4+-) 10...Bg7+- 11.Nbd2 (11.e4 a5+=) 11...0-0 12.Ne5 (12.d4 Bb7+-) 12...Nd7 (12...a6 13.d4 a5 14.Ba3+-) 13.Ndf3 (13.Nd7 Qd7 14.Bg7 Kg7+-) 13...Qc7 (13...Ne5 14.Be5 f6 15.Bb2+=) 14.d4 (14.Nd7 Bd7 15.Bg7 Kg7+-) 14...f6 (14...Nb8 15.Qd2+=) 15.Nd7+- Bd7 16.Rc1 Qb7 (16...a6 17.c4 dc4 18.Bc4+=) 17.c4 (17.Ba3 Rf7+-) 17…a6 1–0. GuestSJSZ – GuestZQSJ, freechess.org, 2016.

5.Nf3 Bd7 6.a4 c6 7.c4 cb5 8.ab5 dc4 9.Bc4 b6 10.Nc3 Rc8 11.Be2 (11.Ne4 Ng6 12.d3 Rc7+-) 11...Nf5 (11...Rc7 12.0-0+-) 12.0-0 (12.Ra7 Rc7 13.Ra6 Nf6+-) 12...Nd6 (better 12...Rc7!?+-) 13.Ra7+- Nb5?? (better 13...Rc7 14.Rc7 Qc7+-) 14.Nb5 Bb5 (14...Nf6+-) 15.Bb5 (15.Bb5 Qd7 16.Bd7 Kd8 17.Qa4 Rc6 18.Ra8 Kd7 19.Ra7 Kd8 20.Qc6 Bd6 21.Qd7) 1–0. GuestYYLH – GuestMQKP, freechess.org, 2017.

5.Nf3 Bd7 6.d4 c6 (6...Nf6 7.Bd3=) 7.a4 cb5 (7...Qa5 8.Bc3 Qc7 9.Bb4+=) 8.ab5+= Qb6 (8...Nf5 9.Bd3+=) 9.c4 (9.Ba3 Ng6 10.Bf8 Nf8+=) 9...dc4 10.Bc4 Bb5 (10...Nf5 11.Nc3+=) 11.Qb3 Bc4?? (better 11...Ba6 12.Qb6 ab6+=) 12.Qb6+- ab6 (12...Ba6 13.Qb3 Nf6 14.Ba3+-) 13.Ra8 (13.Ra8 Kd7 14.Ne5 Kc7 15.Rf8+-) 1–0. GuestCCXY – GuestPKXM, freechess.org, 2020.

5.Nf3 Bd7 6.Be2 b6 7.0-0 a6 (7...Nf6!?+-) 8.ba6+- b5 (8...Bc8 9.Ne5 Ba6 10.Ba6 Ra6 11.Qh5+-) 9.a4! Ra6 (9...ba4 10.Ne5 Decoy) 10.ab5 (10.Nc3!? Ng6+-) 10...Ra1 11.Ba1 c6 (11...Nf6 12.Nc3+-) 12.Ne5 cb5 13.c3 (13.Nc3 Nf6+-) 13...Nf6 (13...Qa5!? 14.Bb2 Nc6 15.Nd7 Kd7+-) 14.Nd7+- Qd7 15.Qb3 g6?? (better 15...Kd8+-) 16.Bb5 Nc6 17.Qa4 Bd6 (17...Ke7 18.Bc6 Qc7+-) 18.Bc6 1–0. DEFFM – GuestFJRK, freechess.org, 2019.

5.Nf3 Bd7 6.Be2 c6 7.a4 cb5 8.ab5 b6 9.0-0 Nf6 10.c4 dc4 11.Bc4 Nf5 12.Qb3 Nd6 Exerts pressure on the isolated pawn 13.Ng5 (13.Be2!?+/-) 13...Nc4 (13...Rc8 14.d3 Rc5 15.Nf3 Bb5 16.Bf6 gf6 A) 17.Ra7? Nc4 (worse 17...Bc4 18.dc4 Nc4 19.Nc3+/-) 18.d4 Rh5-+; B) 17.Bb5 Nb5 18.d4=) 14.Qc4= Bc5 (better 14...Rc8 15.Qd3 Nd5=) 15.Nf7?? (better 15.Be5+=) 15...Kf7-+ 16.f4 h5 (16...Qe7 17.d4 Bd6 18.Ba3-+) 17.f5 h4 18.Be5 (better 18.Bf6 gf6 19.Nc3-/+) 18...Ke7 (better 18...h3-+) 19.d4=+ Bd6 20.Bd6 Kd6 21.e4 Ke7 (21...Ne4?! 22.fe6 Qg5 23.Qb4 Kc7 24.Re1=+ (24.ed7?? Qe3 25.Rf2 Qf2 26.Kh1 Qf1)) 22.e5 Nd5 23.fe6 Be6 24.Qc1 Rc8?? (better 24...Qd7-+) 25.Qg5+- Kd7 26.Qg7 Ne7 27.d5 (27.Ra7?! Rc7 28.Rc7 Kc7=) 27...Bd5 28.Rd1 Rg8? (better 28...Rc5 29.Nc3 Rg8 30.Rd5 Rd5 31.Ra7 Kc8 32.Ra8 Kb7 33.Rd8 Rg7 34.Nd5 Nd5 35.Rd5 h3+-) 29.Rd5 Ke8 (29...Kc7 30.Qe7!! Qe7 31.Ra7 Kb8 32.Re7 Rc1 33.Kf2 Rb1+-) 30.Rd8 Rd8 (30...Kd8 31.Qh6 h3 32.Ra7 Rg2 33.Kh1+-) 31.Qh7 Kd7 (31...Rd1 32.Kf2 Rd7+-) 32.Ra7 Ke8 (32...Ke6 33.Re7 Kd5 34.Qd3 Kc5 35.Rc7 Kb4 36.Qc4 Ka5 37.Ra7) 33.Qe7 1-0. DEFFM – GuestPGXC, freechess.org, 2021.

5.Nf3 Nf6 6.c4 Bd7 7.Be2 (7.Nc3 Ng6+=) 7...a6 (7...dc4 8.Nc3+=) 8.a4 (8.ba6 ba6 9.Nc3 Rb8+=) 8...ab5 9.ab5 dc4 (9...Ra1 10.Ba1 dc4 11.Bc4+=) 10.Ra8+= c6?? (better 10...Qa8 11.Nc3 Ned5 12.Bc4 Bd6+=) 11.Rd8+- (11.Rd8 Kd8 12.Ne5+-) 1–0. GuestNDSG – GuestJQSC, freechess.org, 2020.

5.Nf3 Ng6 6.c4 c6 7.a4 (7.Nc3 Nf6+=) 7...Nf6= 8.Be2 Bb4 9.Qb3 Ba5 (9...Bd6 10.Nc3+=) 10.Ba3 (10.0-0 0-0+=) 10...Ne7 (10...c5 11.Bc5 dc4 12.Bc4+-) 11.0-0+- 0-0 12.Nc3 Re8 13.d4 a6 (13...Qc7 14.cd5 Ned5 15.Nd5 ed5 16.Rfc1+=) 14.Rfc1 Ng6 15.Bd3 Rb8 (15...Bc3!? 16.Qc3 Bd7+-) 16.ba6 (better 16.cd5 Nd5 17.Nd5 Qd5 18.Qc2+-) 16...b5?? (better 16...dc4 17.Qc4 ba6+-) 17.a7 (17.cb5?! Ba6 18.Bb4 Bb7+-) 17...Ra8 18.cb5 cb5 19.Nb5 (19.Bc5 b4 20.Nb5 Ne4 21.Bb4 Bd7+-) 19...Bd7 (19...Ne4 20.Bb4 Ba6 21.Be4 de4 22.Ba5 Qa5 23.Nc7 Ra7 24.Ne8+-) 20.Bg6 hg6 21.Ne5 Bb5 (21...Bd2 22.Rc2 Ba5 23.f3+-) 22.ab5 Ra7 (22...Ne4+-) 23.Nc6 Qb6 (23...Qd7 24.Na7 Bd2 25.Rc2 Qa7 26.b6+-) 24.Bc5 Rb7 (24...Qb7 25.Ba7 Bc7+-) 25.Bb6 Bb6 26.Qa3 (26.Qa3 Rd7 27.Qa6+-) 1–0. Janek – Docce, internet, 2018.

5.Nf3 Ng6 6.c4 Nf6 7.Nc3 Bb4 8.Qb3 Bc3 (8...Be7 9.Be2=) 9.Bc3 dc4 (9...0-0 10.Rc1+=) 10.Bc4+- 0-0 11.0-0 b6 12.a4 Bb7 13.Be2 Ne4 14.a5 Nc3 15.Qc3 Ne7 (15...Rc8 16.ab6 cb6 17.Qb2+=) 16.Rfc1 (16.a6 Bd5 17.d3 Rc8+=) 16...Rc8+= 17.a6 (17.ab6 cb6 18.Qa3 Bf3 19.Bf3 Qd7+=) 17...Ba8 (17...Bd5 18.d4+=) 18.Ng5 (18.d4 c5+=) 18...Nd5 (better 18...c6=) 19.Qc2?? (better 19.Qe5+=) 19...Qg5-+ 20.Bf3 (20.f3-+) 20...Ne3 21.de3 (21.fe3 Bf3 22.d4 Qe3 23.Qf2 Qf2 24.Kf2 Bd5-+) 21...Bf3 22.Qc4 (22.g3 Qb5 23.e4-+) 22…Qg2 0–1. AhmedSultanov (1690) – OGKR (1625), lichess.org, 2019.

5.Nf3 Ng6 6.Be2 f6 7.0-0+= Bd6 (7...e5 8.c4+=) 8.c4 c6 (8...N8e7 9.d4 dc4 10.Bc4+=) 9.d4 N8e7 10.c5 (10.c5 Bc7 11.Nc3+=). DEFFM – GuestQJWV, freechess.org, 2018.

4.a3 a5 5.b5 c6 6.c4 (6.Nf3 Nf6 7.Nc3 Bd6=) 6...cb5 (6...dc4 7.bc6 Bc6 8.Nf3=) 7.cb5 (better 7.cd5 ed5 8.Nf3=) 7...Be7?? (7...Nf6 8.Nf3+=) 8.a4?? (better 8.Bg7 Bf6 9.Bh8 Bh8 10.Nc3+-) 8...Nf6+= 9.Nf3 Ne4? (9...0-0 10.Nc3+=) 10.Nc3 (10.Bg7!? Rg8 11.Bd4 Bc8+-) 10...Bb4 (10...0-0 11.Be2+=) 11.Ne4 (11.Bd3 f5+-) 11...de4+= 12.Nd4 (12.Ne5 0-0 13.Qg4 f5+=) 12...0-0 (12...e5!? 13.Ne2 0-0=) 13.Nc2+- Be7 (13...e5 14.Nb4 ab4+-) 14.Be2 (14.Qg4!? g6 15.Qe4 Bc8+-) 14...f5 (14...Be8!?=) 15.0-0+- g6 (15...Be8!?+-) 16.f3 Bh4 (16...Bd6 17.Nd4 Qh4 18.f4+-) 17.Ne1 (17.Rc1 Be7+-) 17...ef3 (17...Be8 18.Bc4 Bf7 19.fe4+-) 18.Nf3 Bf6 19.Bf6 (19.Qb3 Bc8+-) 19...Qf6 20.Rc1 b6 (20...Bc8 21.Qb3+-) 21.Bc4 (21.d4 Ra7+-) 21...Bc8 (21...Ra7 22.Qb3+-) 22.d4 (22.Nd4 Ra7+-) 22...Nd7 (better 22...Re8+-) 23.Qc2 (better 23.Qb3 Re8 24.Bd5+-) 23...Qg7?? (23...Bb7 24.Qa2 Rfe8 25.Bb3+-) 24.Qd3 (better 24.Be6 Kh8 25.Qc6+-) 24...Nf6 (24...Qe7 25.e4 Bb7 26.ef5 gf5 27.Rfe1+-) 25.Ne5 (25.Qa3 Ne4 26.Ba2+-) 25...Ne4? (25...Qe7 26.d5 ed5 27.Bd5 Nd5 28.Qd5 Be6 29.Nc6+=) 26.Rf4 (better 26.Bb3+-) 26...g5?? (26...Re8 27.Re4 fe4 28.Qe4+-) 27.Re4 (better 27.Rf5! Nd6 28.Rf8 Kf8 29.Bb3+-) 27...fe4 28.Qe4 Rb8 29.Nc6 (better 29.d5 Bb7 30.Nc6 Bc6 31.dc6+- (31.Qe6?! Kh8 32.bc6 Qb2=)) 29...Qg6?? (better 29...Rb7+-) 30.Nb8 (better 30.Ne7 Kg7 31.Ng6 hg6 32.Qe5 Kh6 33.Qb8 Rd8 34.Be6 Kh7 35.Rc8 Kh6 36.Rd8 g4 37.Rh8 Kg5 38.Qf4) 30...Qe4-+ 31.Nc6 Qe3 32.Kh1 Qc1 33.Bf1 Qc4! (33...Qf1?!=; 33...Rf1?!=) 34.Bc4 (34.Bc4 Kf7 Combination) 34...Bd7 (34...Kg7 35.Kg1-+) 35.h3 (35.Ne5 Be8 36.Be6 Kg7-+) 35...Bc6 (better 35...Kf7 36.Ne5 Ke7 37.Bb3-+) 36.bc6?? (better 36.Be6 Kg7 37.bc6 Rf1 38.Kh2-+) 36...Rc8 (36...Kf7 37.g3-+) 37.Bb5 (better 37.Be6 Kf8 38.Bc8+-) 37...Rd8 (37...Kf7 38.Kh2 Ke7 39.Kg3-+) 38.c7?? (better 38.Ba6 Rd4 39.c7 Rd1 40.Kh2+-) 38...Rd4 (better 38...Rc8 39.Bd7 Rc7 40.Be6 Kg7-+) 39.c8Q+- Kg7 40.Qc7 (better 40.Qe6 Rf4 41.Qe7 Rf7 42.Qg5 Kf8 43.Qh6 Ke7+-) 40...Kg6 41.Qc6 (better 41.Qb6 Rd1 42.Kh2+-) 41...Rd1 42.Kh2 Rc1 43.Qb6 (43.Qe6 Kg7 44.Qe7 Kg8 45.Bd7 Re1 46.Qe1 Kf8 47.Qe8 Kg7 48.Qe7 Kg6 49.g4 h5 50.Bf5 Kh6 51.Qf6) 43...Rb1 44.Qa5 (44.Qe6 Kg7 45.Qe7 Kh6 46.Qf8 Kh5 47.Be8 Kh4 48.Qf2) 44...Rb5 45.Qb6 (45.ab5 g4 46.hg4 Kg5 47.b6 Kf4 48.b7 Ke4 49.Qd2 Ke5 50.b8Q Kf6 51.Qh6 Ke7 52.Qg7) 45...Rb6-+ 46.a5 Rb7 0–1. Fettito – mato1234, lichess.org, 2018.

4.a4 Nf6 5.b5=+ (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.a4).

4.b5 Bb4?? 5.Bg7+- a6 6.Bh8 ab5 (6...Nf6 7.ba6 Na6+-) 7.Qg4 Nh6 (7...Bd2 8.Nd2 Ne7 9.Qh4+-) 8.Qb4 Na6 9.Qb2 Nc5 (9...Qg5 10.Nf3 Qg8 11.Rg1+-) 10.Bf6 Qc8 (10...Na4 11.Qe5 Ng4 12.Bd8 Ne5 13.Bc7+-) 11.Bg5 (11.Bg5 Bc6 12.Bh6+-) 1–0. Janek – Tundja, internet, 2017.

4.b5 c5 5.c4 dc4 (5...Nf6 6.Nf3+=) 6.Bc4 (6.Na3 Nf6 7.Qf3 Nd5+=) 6...b6?? (better 6...a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Bc8+-) 7.Qf3+- (7.Qf3 Na6 8.ba6+-) 1–0. GuestHQLF – GuestVCNN, freechess.org, 2020.

4.b5 Ne7 5.Nf3 Ng6 6.c4 dc4 7.Bc4 f6 (7...c6!?=) 8.Qb3+- Qe7 (8...Qc8 9.Nd4 e5 10.Bf7 Ke7 11.Ba3 Kd8 12.Ne6 Be6 13.Be6+- (worse 13.Qe6 Qe6 14.Be6 a6=+)) 9.Nd4 Qb4 10.Ne6 Be6 11.Be6 Qb3 12.Bb3 Nd7 13.0-0 0-0-0 (13...a6 14.ba6 Ra6 15.d4+-) 14.d4+- Bd6 15.a4 Rhf8 16.Be6 (16.Nd2 Rfe8+-) 16...Kb8 (16...Rfe8 17.Bf7 Re7 18.Bg6 hg6 19.Ba3+-) 17.a5+- Rfe8 18.Bf5 Nh4 19.Bd3 (19.Bh7?! g6+-) 19...g5 20.Nd2 Rf8 (20...Bb4 21.Nc4+-) 21.Nc4 (21.Bh7?! f5+-) 21...Be7 (21...f5 22.a6+-) 22.g3 (22.a6!? Ne5 23.Ne5 fe5 24.ab7 Bf6+-) 22...Ng6 23.Bf5 Rf7 (23...c6 24.bc6 bc6 25.Rfb1+-) 24.a6 b6 25.Be6 Rg7 26.e4 Ngf8 (26...Ndf8 27.Bd5+-) 27.Bd5 h5 28.Ne3 g4 (28...Ng6 29.Nf5 Rh7 30.Rac1+-) 29.Nf5 Rh7 30.Bg8 Rh8 (30...Bb4+-) 31.Ne7 Nh7 (31...Rg8 32.Nc6 Ka8 33.Nd8 Nh7+-) 32.Bh7 Rh7 (32...Rde8 33.Nc6 Ka8 34.Bf5+-) 33.Nc6 Kc8 34.Na7 Kb8 35.Nc6 (35.Nc6 Ka8 36.Nd8+-) 1–0. DEFFM – PERECVET, freechess.org, 2020.

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

4.c4 Bb4?? 5.Bg7+- f6 (5...dc4 6.Bh8 Bc6 7.Qg4+-) 6.Nf3 (6.Qh5!? Ke7 7.Bh8 h6+-) 6...Nc6 (6...Ne7 7.Bh8 Kf7 8.Bf6 Kf6 9.Qc2+-) 7.Be2 (7.cd5!? ed5 8.Bh8 Nh6+-) 7...Qe7 (7...Kf7 8.Bh8 Nh6 9.a3+-) 8.Bh8 0-0-0 9.0-0 (better is 9.a3!? Bd6 10.cd5 ed5+-) 9...Nh6 10.Bf6 Qf6 11.d4 dc4 12.Bc4 Rg8 (12...e5 13.a3 Ba5 14.d5+-) 13.Nbd2 Qg6 Threatening mate: Qxg2 14.Nh4 (14.Ne1 Nf5+-) 14...Qg5 15.Ndf3 Qg7 (15...Qg4 16.Kh1+-) 16.Qb3 Nf5 (16...Qf6 17.Rfb1 Nf5 18.a3 Nh4 19.Nh4 Qh4 20.ab4+-) 17.Be6 Nh4 18.Nh4 Be6 19.Qe6 Kb8 20.g3 Be7 21.Nf5 Qg5 (21...Qg6 22.Qb3+- (22.Ne7?! Qe6 23.Ng8 Qg8+=)) 22.Ne7 Ne7 23.Rfc1 Nf5 (23...Nc8+-) 24.Rc5 Rf8 25.Rac1 (25.Rac1 Qg6 26.Qd7+-) 1–0. mtr – floydie, internet, 2001.

4.c4 Bc6 5.a4 b6 (5...dc4 6.Na3 A) 6...Bb4? 7.Bg7 c3 8.Nc4+- (8.Bh8?! Qd2 9.Qd2 cd2 10.Kd1 Ba4 11.Nc2 Bc2 12.Kc2 Nc6+-); B) 6...Nf6+=) 6.Nf3 a5 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+-) 7.b5 Bd7 8.cd5 ed5 9.h3 Nf6 10.Nc3 Be6 11.Ne2 Ne4 12.d3?? (12.Nf4 c5+=) 12...Nf6 (better is 12...Bb4 13.Nc3 Nc3-+ (13...Bc3?! 14.Bc3 Nc3 15.Qc2-+)) 13.Nf4 Qd6 14.Ba3 Qd8 15.Bb2 Bd6 16.Ne6 fe6 17.Qe2 Nbd7 18.d4 c5 19.Ne5?? Qc7 20.Nc6 Nb8 21.Ne5 Be5 22.de5 Ne4 23.Rc1? Nd7?? 24.Qh5 g6 25.Qg4 Ne5?? 26.Qe6+- Qe7 27.Qe7 Ke7 28.Be5 Rhf8 29.f3 Nd6 30.Rd1 Ke6 31.Bf4 Nf5 32.Be2 d4 33.Bc4 Kf6 34.e4 Nh4 35.0-0 g5 36.Bd6 Rf7 37.e5 Kg7 38.Bf7 Kf7 39.f4 Kg6 40.g3 Nf5 41.Rf3 h5 42.g4 Ne3 (42...Ne3 43.f5 Kf7 44.Re3 de3+-) 0–1. nakpim – zoorroo25, kurnik, 2012.

4.Nf3 a6 5.Be2 Nc6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+-) 6.a3 b5 7.0-0 h6 8.d3 Qe7 9.Nbd2 e5 10.c4 d4? (better is 10...Nf6+=) 11.ed4+- ed4 12.Re1 Nf6? (12...Rd8 13.Nb3+-) 13.Bf1 Be6 14.Nd4 Nd4 15.Bd4 Rd8 16.Bb2 Nh7? 17.cb5 ab5 18.d4 c6 19.Ne4 Ng5 20.Nc5 Rd5 21.Ne6 Ne6 22.Qg4 Rg5 23.Qf3 Qd7 24.Rad1 Be7? 25.d5! cd5 26.Re5 Re5 27.Be5 0-0 28.Rd5 Qb7 29.Qb3 Rd8 30.Rd8 Nd8 31.Qb2 f6 32.Bg3 Nc6 33.Qe2 Qd7? 34.Qb5 Bd6 35.Bd6 Qd6 36.a4 Ne5? 37.a5 Qd4 38.a6 Ng4 39.Qe2 h5 40.h3 Ne5 41.b5 Qc5 42.Qe4 Nc4 43.Bc4 Kh8 44.Qd5 Qa3 45.Qg8 (45.Qh5) 1–0. exp2005 – vito40, kurnik, 2011.

4.f4 Nc6 5.b5 Nce7 6.Nf3 f6 7.Be2 a6 8.a4 c6 9.Na3 Nf5 10.0-0 Nd6 11.c4 (11.ba6 ba6 12.Bd4 Nf5+=) 11...ab5= 12.ab5 cb5 (12...dc4 13.bc6 Bc6 14.Nc4 Ra1 15.Qa1+=) 13.Nb5 (13.cd5 ed5 14.Qb3 b4+/–) 13...dc4?? (better is 13...Ra1 14.Nd6 Bd6 15.Ba1 dc4 16.Bc4 b5+=) 14.Ra8+- (14...Bb5 15.Rd8 Kd8 16.Ba3+-) 1–0. Meyer,Claus_Dieter – Seedorff,KO, Bargteheide op, 1988.

4.f4 Nf6 5.a3 a5 6.b5 c6 7.a4 cb5 8.ab5 a4 9.Nf3 Qb6 10.Nc3 a3 11.Bc1 Ne4 (11...Bb4 12.Bd3-/+) 12.Ne5? (better is 12.Ne4 de4 13.Ne5=) 12...Nc3 13.Nd7 Nd1?? (better is 13...Nd7 14.dc3 Bc5-+) 14.Nb6+/– Ra5 15.Nd5 ed5+= 16.Kd1 Nd7 17.d4 Nb6 18.Bd2 Ra8 19.Bd3 Nc4 20.Ke2 Nd2 21.Kd2 Bd6 22.Ra2 0-0 23.Rb1 b6 24.g3 Rfc8 25.Rb3 Ra4 26.c3 g6 27.e4 de4 28.Be4 Kg7 29.Bc6 Rc7 30.Kd3 Re7 31.Rb1 h5 32.c4 h4 33.Rc1 hg3 34.hg3 Bb4 35.c5 1–0. amator111 (1770) – ajtakajtak, kurnik, 2011.

4.Qg4 f5 5.Qg3 c6 (better is 5...Nf6!?=) 6.Bg7+/– Bg7 7.Qg7 Ne7?? (better is 7...Qf6 8.Qf6 Nf6+/–) 8.Qh8+- Kf7 (8...Ng8 9.Qg8 Ke7 10.Qh7 Kd6 11.Nf3+-) 9.Qh7 (better is 9.Qd8 b5 10.Nf3+-) 9...Kf6 10.Nf3 e5 (10...Ng6+-) 11.Qh6 Kf7 12.Ng5 Kg8 13.Qh7 Kf8 14.Qf7 1–0. sunnyda – ola1sator, kurnik, 2011.

4.Qg4 Nf6 5.Bf6 (5.Qg5!?=+) 5...Qf6-/+ 6.c3 e5 7.Qd1 (7.Qf3 Qf3 8.Nf3-/+) 7...d4 (7...Bd6!?-/+) 8.ed4 ed4 9.Qe2 Be7 10.cd4 (10.Nf3 0-0 11.Qe5 Re8 12.Qf6 Bf6 (12...gf6?! 13.Kd1=) 13.Kd1 Nc6-/+) 10...Qd4 (better is 10...Nc6!? 11.Nf3 Bg4-+) 11.Nc3-/+ Qb4 12.Rb1 Qd6 13.Rb7 Bc6 14.Nb5 Bb5 15.Qb5 Nc6 (15...Nd7 16.Nf3=) 16.Nf3 (16.Qc6 Qc6 17.Bb5 Qb5 18.Rb5 0-0-0=+) 16...0-0=+ 17.Be2? (17.Qd3 Qe6 18.Be2 Rab8 19.Rb8 Rb8=+ (< 19...Nb8 20.Qe3+=)) 17...Nd4?? (better is 17...Nd8-+) 18.Nd4= Qd4 19.0-0 a6 20.Qh5 Qd2 21.Rc7 Bd6 22.Rd7?? Rad8?? 23.Rd1 Qd1!-/+ 24.Bd1 Rd7 25.Bc2 g6-/+ 26.Qg4 Rc8?? 27.Qd7+/– Rc2 28.g3 Bc5 29.Kg2 Rf2 30.Kh3+= Ra2 31.Qe8?? Kg7?? 32.Qe5+- Kg8 33.Qc5 a5 34.Qc4 Rf2 35.Qc8 Kg7 36.Qc3 Kg8 37.Qa5 Kg7 38.Qc5 f5 39.Qf2 (39…Kf6 40.Qd4 Ke7 41.Qe5 Kf7 42.Qd5 Ke8 43.Qg8 Ke7 44.Kh4+-) 1–0. pinecrest1981 – momo1238, Live Game Caissa's Web, 2005.

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Bd7).

5.c4 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 Bd7).

5.c4 Bb4 6.Bg7 Bd2 7.Nd2 +-.

5.c4 Nf6 6.b5 (6.c5 a5+=) 6...Be7 (6...dc4 7.Bc4 Ne4 8.Na3+=) 7.Nc3 0-0 8.Be2 (8.Nf3 Bd6+=) 8...c6 (8...dc4 9.Bc4 ab5 10.ab5 Ra1 11.Qa1+=) 9.f4 (9.cd5 ed5 10.bc6 Nc6=) 9...h6 (9...dc4 10.Bc4 cb5 11.ab5+=) 10.Nf3 Bd6 (10...dc4 11.Bc4 Nd5 12.Bd5 ed5 13.bc6 bc6 14.Qb3=) 11.0-0 Qb6 (11...dc4 12.Bc4 cb5 13.ab5=) 12.a5 Qd8 13.b6 Be8 (13...Qe7 14.Ne5+=) 14.Qc2 Nbd7 15.cd5 cd5 16.d4 (16.Rac1 Bb4 17.Qa4 Bc3 18.Bc3 Nb6+=) 16...Rc8 17.Qb3 (17.Ba3 Ba3 18.Ra3 Ne4+=) 17...Nb8 (17...Ng4 18.Bc1=) 18.Rfe1 (18.Rac1 Nc6 19.Qa2 Ng4=) 18...Bc6 (18...Nc6 19.Rec1=) 19.Ba3 Ne4 (19...Ba3 20.Ra3 Qd6 21.Rc1+=) 20.Ne4 de4 21.Ne5 Bd5 22.Qb2 Nc6 (22...f6 23.Ng6 Rf7 24.Bd6 Qd6 25.Rac1+=) 23.Bd6 (23.Rec1 Qe7+=) 23...Qd6 24.Nc6 Bc6 (24...Rc6 25.Rec1=) 25.Rac1 Qd5 (25...Bd5!?+=) 26.Rc5+/– Qd7 27.Rec1 Bd5 (27...Rfd8 28.Qc3 Ra8 29.Bc4+/–) 28.Qb4 (28.Rc7 Rc7 29.bc7+/–) 28...Rc6 (28...Rc5 29.Rc5 Rc8 30.Rc8 Qc8 31.Qc5 Qc5 32.dc5+=) 29.Rc6+/– Bc6 30.Qc5 Rc8 31.Bg4 (31.Qe5 Bd5 32.Rc7 Qd8+/–) 31...f5+= 32.Bd1 Qe8 33.Qd6 Bd7 (33...Bd5 34.Rc7+/–) 34.Rc8 (34.Rc7 Rc7 35.bc7 Qc8+/–) 34...Qc8 35.Qc7 Kh8 (35...Kf7 36.Ba4 Qc7 37.bc7+=) 36.Kf2 (36.Ba4 Qc7 37.bc7 Bc8+-) 36...Kh7 (36...Qe8 37.Qb7 Bb5 38.Be2+-) 37.Ba4! Qc7 (37...Ba4 A deflection 38.Qc8) 38.bc7 Bc8 ½–½. Devis,W – Goossens,P, Beveren, 1995.

5.Nf3 Bb4? 6.Bg7 Nf6 7.Bh8 +-.

5.Nf3 Nf6 6.Bc3 Ne4 =+.

5.h3 c5 6.bc5 Bc5?? 7.Bg7+- Nf6 8.Bh8 Ne4 9.Bb2 Nc6 10.Qh5 Rc8 11.Qh7 Nb4 12.Bd3 Bf8 13.c3 Nd3-+ 14.Ke2 Nb2 15.Ra2 Na4 16.Qh8? Nac3 17.dc3?? Nc3 18.Nc3+- Bb5 19.Nb5 ab5 20.Nf3 Qb6 21.Ne5 b4 22.Rb1 b3 23.Rab2 Rc3 24.Nd3 Qb5 25.Qc3 Ba3 26.Rb3 Qc6 27.Ra3 Qc3 28.Rc3 (28.Rc3 b6 29.Rc7 d4 30.Rb6 Kf8 31.Ne5 d3 32.Kd3 Kg7 33.Rf7 Kh6 34.h4 Kh5 35.Rh7) 1–0. cogit – oniega, kurnik, 2012.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nc3 Nf6 9.Nf3 Be7 10.Bd3 0-0 11.Ne5 c5 12.0-0 c4 13.Be2 Ne4?? (better is 13...Be8=) 14.Ne4+- Bb5 15.Qb1 de4 (15...Qa5 16.Bc3 Qa6+-) 16.Qb5 Qd5 17.Qd5 ed5 18.Rb1 Bd6 (18...Nc6 19.Rb7 Rb8 20.Rd7 (20.Nc6?! Rb7 21.Ne7 Re7+-) 20...Rb1 21.Bf1 Ra1 22.Nc6+-) 19.Rb7 f6 20.Nd7 Nd7 21.Rd7 Be5 (21...Rb8 22.Rd6 Rb1 23.Bf1 Ra1 24.c3+-) 22.Be5 fe5 23.Rd5 Rc8 (23...Rb8 24.g3 c3 25.dc3+-) 24.c3 1–0. b4_player – hernan, casual, 2013.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Qe7 8.c4 dc4 9.Bc4 (9.Qa4!? Qd8 10.Bc4=) 9...Qb4=+ 10.Qc2 f6 (better 10...Bb5!? 11.Bb5 Qb5-/+) 11.Nf3+= Bd6 12.0-0 (12.Ng5 Bb5 (12...fg5? 13.Bg7 Bb5 14.Be6+-) 13.Be6 A) 13...fg5? 14.Bg7 Ke7 15.Bf5+- (15.Bh8?! Ke6 16.Qh7 Ne7+=); B) 13...Ba4+=) 12...Bb5= 13.Bb5 Qb5 14.Nc3 Qc6 15.Rc1 Ne7 16.Bb2 (16.Nd4 Qd7=) 16...0-0 (16...Na6 17.Nd4 Qd7 18.Ne4=+) 17.Qb3 Nd5 18.Nd4 Qb6 19.Nd5 Qb3 (worse 19...ed5 20.Qd5 Kh8 21.Bc3+=) 20.Nf6 (worse 20.Nb3 ed5 21.Nd4 Na6-/+) 20...gf6 21.Nb3 e5 (21...Na6 22.d4=) 22.d4 Nc6 23.g3 Ra8 24.Nd2 Kf7 25.Ne4 Ke7 26.Bc3 Rb8 (26...Ra4 27.Kg2=+) 27.f4 ed4 28.ed4 b5? (better 28...f5 29.Ng5 h6 30.Re1 Kf8=) 29.d5+- Nd8 30.Bf6 Kd7 31.Be5 b4 32.Nc5 (better 32.Nf6 Ke7 33.Nh7+-) 32...Bc5+/- 33.Rc5 b3? (better 33...Rb7+/-) 34.Rc7+- Ke8 35.Rc1 (35.Bb2 Rb5 36.Ba3 Nb7 37.Re7 Kd8 38.Rh7 Na5+-) 35...b2 (better 35...Rb5 36.Rd1 Nb7+/-) 36.Rb1 Nf7?? (36...Rb5+-) 37.Bb8 1-0. BeepBeepImAJeep - Hannibal_Younga (1730), lichess.org, 2016.

5.Bc4 Bb4?? 6.Bg7+- Bc6? 7.Nf3 Bf3 8.Qf3 Nc6 9.Bh8 Nh6 10.Bb2 Nf5 11.0-0 Qd7 12.Bf6 Nce7 13.d4 0-0-0 14.Rd1 Qe8 15.d5 ed5 16.Bd5 Rd5 17.Rd5 Bd6 18.Nc3 Nh6 19.Rh5 Nhg8 20.Rh7 Nf6 21.Qf6 Nc6 22.Rh8 Bf8 23.Ne4 Ne7 24.Ng5 b6 25.Qf7 (25.Qf7 Qf7 26.Nf7+-) 1–0. carocan (1820) – tajemnyswiat, kurnik, 2011.

5.Bc4 Bb4?? 6.Bg7 Qg5 7.Bh8 Qg2 8.Qf3 +=.

5.Bc4 b5 6.Be2 f6 (6...Nf6 7.Qb3=) 7.Bf3 (7.a4 Bb4 8.ab5 c6+=) 7...Bc6 8.Bc6 Nc6 9.Qh5 g6 10.Qb5 Qd6 (10...Qd7 11.a3+=) 11.a3+/– Rb8 12.Qa6 Nge7? (better is 12...Qd7 13.d4 Rb6+/–) 13.Bf6+- Rg8 14.Nc3 White prepares the advance b5 14...Rb6 15.Qc4 Nd5 16.Ne4 Qd7 17.d4 (17.Bc3 Bd6+-) 17...a5 18.b5 (18.Nc5!? Bc5 19.bc5 Rb2+-) 18...Na7 19.Nf3 Qb5 20.Nfd2 (20.Qa2+/–) 20...Qb2? (better is 20...Ba3!? 21.0-0 Bb2+/–) 21.Ra2 (21.0-0!? Rc6 22.Qe2 Qb5+-) 21...Qb5 22.0-0 Rc6 23.Qb5 Nb5 24.Rfa1 Ndc3 25.Nc3 Nc3 26.Rb2 Ne2? (better is 26...Bd6!?+/–) 27.Kf1+- Rc1 (27...Kf7 28.Be5 Nc1+-) 28.Rc1 Nc1 29.Rc2 Ba3 30.Nc4 (30.Rc7?! Rf8 31.Ne4 Rf7+-) 30...Rf8 31.Na3 Rf6 (31...Nd3 32.Bh4 Kd7 33.Bg3+-) 32.Rc1 (32.Rc1 h6 33.Rc7+-) 1–0. mtr – NirAG29, internet, 2001.

6.a3 a6 A) 7.Bc3 Bd6 (7...Nc6 8.Nf3 b5 9.Be2 Bd6 10.0-0 0-0; 7...Bc6 8.Nf3 Bd6 9.0-0 0-0 10.d3 b5; 7...b5 8.Be2 c5 9.Bf3 Nc6 10.Ne2 Rc8) 8.Nf3 b5 9.Be2 Nc6 10.0-0 0-0; B) 7.Nf3 b5 (7...Bd6 8.0-0 Nc6 9.Bf6 Qf6 10.d4 b5) 8.Be2 c5 9.Ne5 Ra7 10.a4 ba4; C) 7.Nc3 b5 8.Be2 c5 9.Bf3 Bc6 10.bc5 Bc5; D) 7.d4 Bb5 8.Bb5 ab5 9.Nc3 c6 10.Nf3 Be7.

6.a3 b5 7.Be2+= (7.Qf3 bc4 8.Qa8 Bc6 9.Qa7 Bg2 10.Bf6 gf6) 7...a5 8.ba5 Ra5 9.Nf3 Bd6 10.Bc3 Ra6.

6.a3 c5 7.b5 a6 (7...Ne4 8.Nc3 Nd6 9.Be2 a6 10.ba6 Na6; 7...Be7 8.Qf3 Qb6 9.a4 Nc6 10.Na3 0-0) 8.Nc3 Be7 9.Nf3 ab5 10.Nb5 0-0.

6.a3 Bd6 7.Nc3 0-0 (7...a6 8.d4 Nc6 9.Nf3 0-0 10.0-0 e5; 7...e5 8.Nf3 0-0 9.d4 ed4 10.Nd4 a5; 7...c6 8.d3 a5 9.b5 a4 10.Nf3 Qa5; 7...a5 8.b5 0-0 9.d3 e5 10.Nf3 Bg4) 8.Nf3 e5 9.d4 Nc6 10.0-0 e4.

6.a3 Bd6 7.d4 Bc6 (7...0-0 8.Nf3 b5 9.Bd3 Bc6 10.0-0 a5; 7...a5 8.b5 0-0 9.Nc3 c6 10.Nf3 Qe7; 7...c6 8.Nf3 a5 9.ba5 Qa5 10.Bc3 Qa4) 8.Nf3 Bd5 9.Bd3 a5 10.b5 Be4.

6.a3 Bd6 7.Qe2 e5 (7...a6 8.Nf3 b5 9.Bd3 Bc6 10.0-0 Nbd7; 7...0-0 8.Nf3 a5 9.b5 c6 10.Nc3 e5; 7...Nc6 8.Nf3 Qe7 9.d4 0-0 10.e4 Bf4; 7...a5 8.b5 c6 9.e4 cb5 10.Bb5 Qb6) 8.e4 Bg4 9.Nf3 a5 10.b5 Nbd7.

6.a3 Bd6 7.Nf3= Nc6 (7...0-0 8.Nc3= (8.Ne5 a5 9.b5 c6 10.Nd7 Nbd7) 8...e5 9.d4 ed4 10.Nd4 a5; 7...b5 8.Bd3 a5 9.Nc3 c6 10.Ne4 Ne4; 7...a6 8.0-0 0-0 9.Nc3 Nc6 10.d4 Re8) 8.0-0 Qe7 (8...a6 9.Qc2+= (9.d4 Ne7 10.Nc3 Ned5) 9...b5 10.Be2 0-0) 9.Qc2 (9.b5 Na5 10.Be2 a6) 9...0-0-0 (9...0-0 10.b5 (10.d4 a6) 10...Na5 11.Be2=; 9...e5 10.d4 e4) 10.Nc3 (10.b5 Nb8+/–) 10...Nb8 (10...e5 11.Ng5 Rdf8 12.d3+=) 11.b5 (11.d4 g5+/–) 11...b6 (11...e5!?+/–) 12.a4 Bb4 13.Ne5 Bc3 (13...h5 14.Rfc1+-) 14.Qc3 (14.dc3?! Qc5 15.Nd7 Rd7+/–) 14...Ne4 15.Qc2 f5 (15...Nd6 16.Rfc1+-) 16.a5 Rhg8 (16...Nd6 17.ab6 ab6 18.Ra7+-) 17.ab6 cb6 (17...ab6 18.Ra7 Rdf8+-) 18.Ra7 Qc5 (18...Nc5+-) 19.Nd3 Qc6 20.bc6 (20.bc6 Nc3 21.cd7 Rd7 22.Be6+-) 1–0. pereira – tciul, internet, 2009.

5.Nf3 Bb4?? 6.Bg7 dc4 7.Bc4+-.

5.Nf3 Nf6 6.cd5 (6.c5 Be7=) 6...cd5 7.b5 Be7 8.Nc3 b6 (8...0-0 9.Be2=) 9.Rc1 a6 10.Qa4 0-0 11.Be2 Qc7? (better is 11...Ne8=) 12.Nd5!+- Qd6 (12...ed5 13.Rc7 Discovered attack; 12...Nd5 13.Rc7 Discovered attack) 13.Ne7 Qe7 14.Ba3 Qd8 15.Bf8 Qf8 16.Ne5 Qe8 17.0-0 Bc8 (17...Ra7 18.d4+-) 18.Bf3 Ra7 (18...Nd5 19.ba6 Bd7 20.Nd7 Nd7 21.Bd5 ed5 22.Qb5+-) 19.Qd4 Bb7 (19...ab5 20.Qb6 Nbd7 21.Qa7 Ne5+-) 20.Qb6 Qb5 (20...Bf3 21.Qa7 Bd5+-) 21.Qa7 Bf3 22.Qf7 Kh8 23.Qf8 1–0. marre – oppo, internet, 2010.

5.Nf3 h6 6.Be2 Nf6 7.b5 (7.c5 b6=) 7...cb5 (7...dc4 8.bc6 Bc6 9.Bc4=+) 8.cb5= Bd6 9.0-0 0-0 10.a4 Re8 11.Ne5 Qc7 12.f4 a6 13.Nd7 (13.Na3 Qa5+=) 13...Nbd7= 14.Na3 e5 15.Rc1 Qb8 16.fe5 Be5 17.Be5 Qe5 18.Rf4 Qg5 (18...Qd6 19.Qb3=) 19.Qb3 (19.Rc7 Re4 20.Re4 de4=) 19...Re4= 20.h4 (20.ba6!? ba6 21.Qb7=) 20...Qe5 21.Rcf1 Nc5 22.Re4 (22.Qc2!? Rf4 23.Rf4=+) 22...Nce4 (22...Nb3?? 23.Re5 ab5 24.Bb5 Nd2 25.Rf6 gf6 26.Rd5+-; 22...Nfe4?! 23.Qc2 Ng3 24.Re1-/+; 22...Qe4?! 23.Qc3 Na4 24.Qc7=+; 22...de4?! 23.Qb4-/+) 23.d4 Qg3 24.h5? (better 24.ba6 ba6 25.Qd3-+) 24…Ng4 (24...Ng4 25.Bg4 Nd2=+) 0–1. GuestHKRL – Paradoxm, freechess.org, 2017.

5.Bg7 Bd2 6.Nbd2 +-.

5.Bg7 Nf6 6.Bh8 Ne4 7.c4 (7.Be2 f6 8.c3 Be7+-) 7...dc4 (7...Bc6 8.Nc3+-) 8.Bc4 b5 (8...Nc6 9.a3 Ba5 10.0-0+-) 9.Qc2 (9.Bd3 Bc6 10.Ne5 Nc5+-) 9...Nd6 (9...f5 10.Be2+-) 10.Be2 Nc6 (10...f5 11.Bc3 a5 12.Bb4 ab4 13.Qb2+-) 11.Qh7 Ke7 (11...Qe7+-) 12.Qh4 Ke8 13.Bf6 Qf6 14.Qf6 Nf5 15.e4 Nfd4 16.Nd4 Nd4 17.Bh5 Nc2 18.Kf1 (better 18.Kd1 Bc6 19.Bf7 Kd7 20.Qe6 Kd8 21.Qc6 Ne3 22.fe3 Ke7 23.Qe6 Kf8 24.Bh5 Kg7 25.Qf7 Kh8 26.Bg6 Bd2 27.Qh7) 18...Na1 19.Bf7 Kf8 20.Be6 Ke8 21.Qf7 (21.Qf7 Kd8 22.Qd7) 1–0. michaelbuss (2815) – Craig485586, ChessWorld.net, 2010.

5.Bg7 Nf6 6.Bh8 Qe7 7.c3 Ba5 (7...Bd6 8.Qb3 b6 9.d4+-) 8.Ne5 Nc6 9.Qa4 (9.Nc6 Bc6 10.Qf3 Nd7+-) 9...Bb6 (9...Bc3 10.Nc3 Ne5 11.Qf4+-) 10.Qf4 (10...Ne5 11.Qe5+-; 10.Qh4 Ne4 11.Qh7 Ne5 12.Be5 f6 13.Qg8 Qf8 14.Qf8 Kf8+-) 1–0. pcmvr (1700) – rodolfo, net–chess.com, 2006.

5.b5 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd7).

5.bc5 Bc5?? 6.Bg7 Qb6 (6...Nf6 7.Bh8 Nc6 8.d4+-) 7.Bh8 f6 (7...Nc6 8.Nc3+-) 8.Nc3 (8.Bd3 h6+-) 8...Na6 (8...Bb4 9.Rb1 Qa5 10.Bd3+-) 9.Rb1 Qc7 10.Bd3 (better 10.Nd4 Bd4 11.Qg4 0-0-0 12.Qd4 Nc5+-) 10...e5 (10...Bc8 11.Nd4 Qf7 12.Bb5 Kd8 13.Ba6 ba6 14.Qf3+-) 11.Bh7 Kf7 (11...0-0-0 12.Nd5 Qd6 13.c4+-) 12.Nh4 d4 (12...Be6 13.Qh5 Ke7 14.Bg8 Rg8 15.Ng6 Kd8 16.Bf6 Kc8 17.Ne5+-) 13.Qh5 Ke7 (13...Ke6 14.Bg8 Rg8 15.Qf5 Kf7 16.Qh7 Kf8+-) 14.Nd5 (14.Nd5 Kd8 15.Nc7 Kc7 16.Be4+-) 1–0. AhmedSultanov (1745) – koenigin68 (1735), lichess.org, 2019.

5.b5 Nce7 6.a4 b6 (6...Nf6 7.a5=) 7.c4 f6 8.Be2 c5 9.d4 cd4 10.Nd4 Nh6 11.0-0 Nhf5? (better is 11...e5!? 12.Nb3 Be6+=) 12.Nf5+- Nf5 13.cd5 e5 14.e4 Nd6 15.Nd2 Rc8 16.Rc1 Be7 17.h3 0-0 18.Rc8 Qc8 19.Qc1 Qc1 20.Rc1 Rc8 21.Rc8 Nc8 22.Bc4 Bb4 23.Nb1 Kf8 24.Ba3 Ba3 25.Na3 f5 26.f3 fe4 27.fe4 Ke7 28.Nc2 Kd6 29.Kf2 Kc5 30.Bd3 Nd6 31.Ke3 Nc4 32.Bc4 Kc4 33.Kd2 (33.Ne1 Kb4+-) 33...Kb3 (33...h6 34.h4+/–) 34.g4 (34.Ne1!?+-) 34...Ka4+/– 35.Ne3?? (better is 35.Ne1!? Kb5 36.Nd3+/–) 35...Kb5 (35...Kb4 36.h4+=) 36.Kc3= Kc5 37.Nc4 b5 38.Ne5 b4 39.Kb3 Bb5 40.h4 a5 41.g5 a4 42.Kb2 g6 43.Ng4?? (better is 43.Kb1+=) 43...a3-+ 44.Ka1 (44.Ka2 Bc4 45.Kb1 Bd3 46.Ka2 Be4 47.d6 Bd5 48.Kb1 Kd6 49.Nf2-+) 44...b3 45.Nf6 Bd3 0–1. Hal1958 – Mrchess, playchess.de, 2004.

5.b5 Nce7 6.c4 dc4 7.Bc4 c6 8.Ne5 (8.Nc3 Nd5=) 8...cb5 9.Qh5 Threatening mate... how? 9...g6 (better is 9...Nh6!? 10.Be2 a6+=) 10.Qf3+/– Threatening mate: Qxf7 10...f6 11.Nd7 Qd7 12.Bf6 Nf6 13.Qf6 0-0-0?? (better is 13...bc4 14.Qh8 Nc6+=) 14.Be6+- (14.Be6 Rg8 15.Qc3 Nc6 16.Bd7 Rd7 17.Qb3+-; 14.Qh8?! bc4 15.Qh7 Qd3+-) 1–0. mtra – jelemile, internet, 2002.

5.a3 a5 =.

5.a3 a6 6.c4 dc4 7.Bc4 Nh6 8.0-0 e5? (8...b5 9.Bd3+=) 9.h3 (9.Ne5 Bc8 10.Nd3 Bg4+-) 9...c5? (9...Bb5 10.Bb5 ab5 11.Qc2+/–) 10.bc5 (10.Ne5 Qb6 11.Nd7 Nd7 12.Qh5 Kd8+-) 10...Qc8? (better is 10...Bc5!? 11.d4 ed4 12.Nd4 Nf5+/–) 11.d4+- Bc5 (11...b5 12.Bb3 Ra7+-) 12.dc5 Qc5 13.Qd5 Qd5 14.Bd5 Nc6 15.Nbd2 Rb8 16.Rfd1 Nf5 17.Rab1 g5 (17...b5 18.e4 Nfe7 19.Rbc1+-) 18.Ne4 Ke7 19.Bc3 h5 20.Nc5 g4 21.hg4 hg4 22.Nd2 Rh6 23.Nde4 Rbh8 24.Kf1 Rh1 25.Ke2 Ncd4 (25...Rd1 26.Rd1 Bc8+-) 26.ed4 Nd4 (26...Bb5 27.Rb5! ab5 28.de5 fe5 29.Rh1 Rh1 30.Be5+-) 27.Bd4 Bb5 28.Ke3 (better is 28.Nd3 Bd3 29.Rd3 Rb1 30.Bc5 Kd7 31.Ba2 Kc7 32.Bb1 Rh1+-) 28...R8h3 (28...ed4 29.Kd4 Rd1 30.Rd1 b6+-) 29.gh3 Rh3 (29...ed4 30.Kd4 Rd1 31.Rd1+-) 30.Kd2 Rd3 31.Nd3 g3 32.fg3 f5 33.Bc5 Kd8 34.Nc3 Bd3 35.Kd3 e4 36.Be4! fe4 37.Ke4 Kc8 38.Ke5 Kb8 39.Bb6 Kc8 40.Ke6 a5 41.Rd8 1–0. Hal1958 – Maillard, playchess.de, 2005.

5.b5 a6 6.ba6 Na6 7.Be2 =.

5.b5 c6 6.a4 cb5 (6...e5 7.Nc3=) 7.ab5+= Qb6 (7...e5 8.Nc3 Be6 9.Be2+=) 8.Na3 (8.Bd4 Bc5 9.Bc5 Qc5+=) 8...Nh6 (8...Bc5 9.d4 Ba3 10.Ba3 Bb5 11.Bc5+-) 9.c4 (9.Bd4 Bc5+=) 9...Ba3 (9...dc4 10.Bc4 e5 11.0-0+=) 10.Ba3 dc4 11.Bc4 Nf5 (11...e5 12.Rc1+=) 12.Qb3 a6 (12...e5 13.Rc1 Kd8 14.Qd3+/–) 13.Bb2 (13.d4 Qa5 14.Nd2 Nh4+/–) 13...Kf7 (13...e5 14.Bf7 Ke7 15.d4 Qb5 16.Ba3 Kd8 17.Qb5 Bb5 18.de5+=) 14.0-0 (14.Nd4 Ne7+/–) 14...Rc8 (14...Nd6 15.Bd4 Qd8 16.ba6 Nc4 17.Qc4 Na6 18.e4+=) 15.Nd4+/– White gets in control 15...Nd4 16.Bd4 (worse is 16.ed4 Ra7+=) 16...Qc7 (16...Qd6!?+/–) 17.Rfc1+- Qd8 18.Bc3 (18.ba6 b5 19.Bd3 Na6 20.Bh7 Bc6+-) 18...Qe8 19.Bd3 g6 (19...Kg8 20.Be4 Rc5 21.ba6+/– (21.Bb7?! Rb5 22.Qb5 Bb5 23.Ba8 Nd7=)) 20.h3 (20.ba6 ba6 21.Qb2 Qe7+/–) 20...Kg7 (better is 20...Qd8!?+/–) 21.Be4+- Bb5 22.Bb7 Nc6 23.Ba8 Ra8 24.Qb2 (24.d4 Qd7+-) 24...Qf7 (24...e5 25.d4+-) 25.Ba5 (25.d4 Bc4+-) 25...Ra7 (25...e5 26.d4+-) 26.d4 Rd7 (26...e5 27.Bc3 ed4 28.Bd4+-) 27.Bb6 (27.Bc3 Rd8+-) 27...Rb7 (27...e5 28.Qc3+-) 28.Bc5 Rd7 (28...e5 29.Qc2+-) 29.Ra3 (29.e4 Rb7+-) 29...Rb7 (29...e5 30.Rd1+-) 30.Qa2 Rd7 31.Rac3 (31.Rd1 Ne5+-) 31...Rc7 (31...e5 32.Qd2 Qd5+-) 32.Bb6 (32.Qc2 Qd7+-) 32...Rc8 33.Qa3 (33.e4 Qd7+-) 33...Qd7 34.Bc5 (34.e4 Rb8 35.Bc5 Nd4 36.Bd4 Qd4 37.Qe7 Kh6+-) 34...Kf7 (34...e5 35.de5 fe5 36.e4+-) 35.Qa2 (35.e4 Rb8+-) 35...Rc7 (35...Kg7 36.e4+-) 36.Ba3 (36.e4 Kg8+-) 36...Rb7 (36...Kg7 37.e4 Rb7 38.d5+-) 37.Rc5 (37.Qc2 Ne7+-) 37...Kg7 (37...Rc7 38.Qa1+-) 38.Qc2 Rc7 (38...Rb6 39.Rd1+-) 39.Qc3 Rc8 40.Bb2 Qf7 41.e4 (41.Rc6?! Rc6 42.Qd2 Qb7+=) 41...e5 (41...Rb8 42.Qg3 (42.Rc6?! Bc6 43.Qc6 Rb2+/–) 42...Rb7 43.Rb5 ab5 44.Rc6+-) 42.d5 (better is 42.de5 Kg8 43.ef6+-) 42...Nd4 43.Kh2?? (better is 43.Qd4! ed4 44.Rc8+-) 43...Rc5+= 44.Qc5 Nb3 45.Qc3 Nc1 46.Bc1 g5 (46...Qd7 47.Ba3+=) 47.Ba3 (47.Be3 Qg6 48.f3 Qe8+/–) 47...h5 48.Qc8 (48.Qe3 g4+/–) ½–½. Liepert,Luise – Hoose,Hannelore, BL (Women) Germany, 1993.

5.b5 c6 6.c4 cb5 (6...dc4 7.bc6 Nc6 8.Bc4=) 7.cb5 (7.cd5 ed5 8.Nc3 a6+=) 7...Ne7 8.a4 e5 9.Be2 Nf5 10.0-0 Bb4 (10...Be6!?=) 11.Qb3+/- a5 (11...Qe7 12.Qd5 Be6 13.Qe4+/-) 12.Qd5 (12.ba6 Nc6 13.ab7 Ra7+-) 12...Qb6+/- 13.Bc4 Ne7 (13...Nd6 14.Ne5! fe5 15.Qe5 Kd8 16.Qg5 Ke8 17.Bg7 (17.Qg7?! Rf8 18.Bd5 Nf5 19.Qh7 Bc8+-) 17...Nc4 18.Bh8+-) 14.Qf7 Kd8 15.Qg7 Ng6 16.h4 (better 16.d4 e4 17.Nfd2+-) 16...Be6?? (16...Bg4 17.Nh2 Bf5+-) 17.Be6 Qe6 (17...Be7 18.Bh3 Bf8 19.Qf7+-) 18.Qb7 Rg8 (18...Qg4 19.Qa8 Ke7 20.Qa7 Nd7 21.Nc3+-) 19.Qa8 Qd6 (19...Ke7 20.Nc3 Nd7 21.Qd5+-) 20.Qa7 (20.d4 e4 21.Qe4 Ne7+-) 20...Nd7 21.d4 (better 21.Rc1 Ke7+-) 21...e4 (21...Qd5 22.Nc3 Bc3 23.Bc3+-) 22.Qa8 Qb8 23.Qe4 Bd6 (23...Rg7 24.Bc3+-) 24.Nbd2 (24.Bc3 Bc7+-) 24...Ne7 (24...Bb4 25.Rad1+-) 25.Ba3 (25.Bc3 Bc7+-) 25...f5 (25...Ba3 26.Ra3 f5 27.Qe6+-) 26.Qd3 (26.Bd6 fe4 27.Bb8 ef3+-) 26...Nf6 (26...Ba3 27.Qa3 Nb6 28.Rfc1+-) 27.Bd6 Qd6 28.Ne5 (28.Qc3 Qb4 29.Qb4 ab4+-) 28...Qd5 29.f3 (29.Ndf3 Nd7 30.Qc4 Ne5 31.Qd5 Nd5 32.Ne5 f4+-) 29...Rg3 (29...Nd7 30.Qc3 Ne5 31.de5+-) 30.Rf2 (better 30.Qb3 f4+-) 30...Qg8 (30...Nd7 31.Nec4+-) 31.Nc6 (better 31.Qc3!? Ke8+-) 31...Nc6 32.bc6 Nh5 (32...Qd5+-) 33.Rb1 (33.Qf5 Qe8 34.Rb1 Qc6 35.Rb8 Ke7 36.d5 Qc1 37.Nf1 Qc8 38.Rc8 Rg2 39.Rg2 Nf4 40.Rg7 Kd6 41.Rc6) 33...Kc7 34.Qf5 (34.Qf5 Rg2 35.Rg2 Qg2 36.Kg2 Nf4 37.Qf4 Kc6 38.Nc4 Kd7 39.Rb7 Ke6 40.Qe5; 34.Rb7 Kd6 35.Rd7 Ke6 36.Qb3 Kf6 37.Ne4 fe4 38.fe4 Rf3 39.Rf3 Nf4 40.Qg8 h6 41.Rf4) 1-0. iamdudum (1615) – jrjs, Rated Classical game, lichess.org, 2013.

5.b5 c6 6.Ne5 Ne7 (6...cb5?? 7.Qh5 g6 8.Ng6+-) 7.Nd7 Nd7=.

5.a3 b5 6.d4 (6.Be5 a5 7.Nc3 c6=) 6...a5 7.c3 Bd6 8.Bd3 0-0 9.0-0 Nc6 (9...c6!?=) 10.Bb5+= e5?? (better is 10...Na7 11.Bd3 Bb5+=) 11.Bc6+- Bc6 12.de5 (12.Ne5?! Bb5 13.Re1 Re8+/–) 12...Be5 (12...Bb5 13.Re1+-) 13.Ne5 Bb7 (13...Bb5 14.c4! dc4 15.Nc3+-) 14.Nd2 1–0. Wall,Bill – Dreemer, internet, 2005.

5.a3 c5 6.bc5 Bc5 7.Be2 =.

5.a3 Nc6 6.c4 Bd6 7.c5 Be7 8.Bd3 (8.d4+=) 8...e5 (better is 8...a5!? 9.Qb3 ab4 10.ab4 Ra1 11.Ba1 b6=) 9.Ne5+/– (9.Be5?! a5 (worse is 9...Ne5 10.Ne5 a5 11.Nc3+/–) 10.Bc2 Ne5 11.Ne5 ab4=) 9...Bg4?? (better is 9...Ne5 10.Be5 b6+/–) 10.Ng4+- Qd7 (10...Ng4 11.Qg4 Bf6 12.Nc3+-) 11.Ne5 (11.Nf6 Bf6 12.Bf6 gf6+-) 11...Qe6 (11...Ne5 12.Be5 b6 13.cb6 ab6 14.0-0+-) 12.Nc6 Qc6 13.Nc3 Qe6 14.Nb5 Qc6 (14...Qd7 15.0-0+-) 15.Qa4 (better is 15.Be5 Bd8 16.Bc7 0-0+-) 15...Rd8 (15...0-0 16.Qc2+-) 16.Nc7 (better is 16.Nd6 Rd6 17.Bb5+-) 16...Kd7 (16...Kf8 17.Qc6 bc6+-) 17.Bb5 Rc8 18.Bc6 bc6 19.Na6 (better is 19.Bf6!? Bf6 20.Nd5 Ke6 21.Nf6 Kf6 22.Qa7 Rhe8+-) 19...Ne4 20.d3 h5 21.de4 Rh6 22.ed5 Rg6 23.d6 (23.dc6 Rgc6 24.Nb8 Rb8 25.Rd1 Ke8 26.Qc6 Kf8+-) 23...Bf6 24.Bf6 Rf6 25.Qc2 (25.Nb8! Ke6 26.Qa7 Rg8 27.Nc6 Re8+-) 25...Re8 26.Qd3 (26.b5 Re3 27.fe3 Ke8 28.Qe4 Re6 29.Nc7 Kd7 30.Qc6 Kd8 31.Ne6 fe6 32.Qc7 Ke8 33.Qe7) 26...Rfe6 27.Qf5 g6 28.Qf7 R6e7 29.de7 Re7 (29...g5 30.Rd1 Kc8 31.Qe8 Kb7 32.Qd7 Ka6 33.Qc6) 30.Rd1 Kc8 31.Qe7 h4 (31...g5 32.Rd8) 32.Rd8 1–0. 1805DYDIDIDY – Adnan@, mySchach.de, 2005.

5.a3 Bd6 6.Be5 =.

5.a3 Be7 6.c4 dc4 7.Bc4= b5 8.Bb3 (8.Be2 0-0=) 8...0-0 (8...a5 9.ba5 0-0 10.Nc3=+) 9.0-0 c5 10.bc5= Bc5 11.Nc3 b4 12.ab4 Bb4 13.Ne5 a5 14.Qf3+= Ra7 15.Nd7 Rd7 16.Rfd1 Na6 17.d4+= Nc7 18.Ba4 Rd6 19.Ne2 Qb8 20.Rab1 Rb6 21.Bc2 Ncd5 22.e4 Ne7 23.Qd3 Ng6 24.e5 Nd5= 25.g3 Rd8 26.h4 f5 27.ef6= Nf6 28.Qe3 Kh8 29.Qg5 Rd5 30.Qe3 Rdb5 31.Bd3 Rd5 32.Bg6 hg6 33.Nf4 Qe8? 34.Nd5+- Nd5 35.Qd3 Qf7 36.Kg2 Rb8 37.Rh1 Rf8+/– 38.Qe2 a4 39.h5 g5 40.h6 g6 41.Bc1 Nc3?? 42.Qe5 Kh7 43.Qg7! Qg7 44.hg7 Kg7 45.Rb4 Na2 46.Rb7 Kf6 47.Bb2 Rc8 48.d5 e5 49.Rhh7 a3 50.Rbf7# 1–0. Semenko,Georg(Jurko) – Hahn,Richard, 6sen.BayEM Schney, 1994.

5.a3 Be7 6.Be2 c5 =.

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.Nf3).

5.Bg7 e5 6.Bh8 ef4 7.ef4 Qh4 8.g3 Qe7 9.Ne2 +-.

5.Bg7 Qh4 6.g3 +-.

4.b5 b6 5.Nf3= h6 (5...a6 6.Be2=) 6.Be2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Ngf6 10.0-0 (10.Nd4 Bb7=) 10...g6 (10...Bd6 11.Nd4 0-0 12.f4=) 11.d3 Bg7 12.Nbd2 0-0 13.c4 dc4 14.dc4 Nc5 15.Bc3 g5 (15...Bb7 16.Qc2=) 16.Bb4 Re8 17.Nb3 (better is 17.Qc2!?+=) 17...Qd1=+ 18.Nc5?? (better is 18.Bd1 Nd3 19.Bc3=) 18…Qe2-+ 0–1. yannigator (1920) – beammeupscotty (2115), net–chess.com, 2009.

4.b5 Ngf6 5.Nf3 =+.

4.Bb5 Bd6?? 5.Bg7+- Be5? (5...c6 6.Bc6 bc6 7.Bh8+-) 6.Bh8 (better 6.Be5 f6 7.Qh5 Ke7 8.Bg3+-) 6...Bh8 7.c3 c6 8.Bd3 (8.Be2 e5+-) 8...e5 (8...Ngf6 9.Nf3+-) 9.Bh7 Ngf6 10.Bc2 e4 11.d3 Ne5 12.d4 Nc4 13.Nd2 Bg4 14.f3 (14.Ne2!? Nd2 15.Qd2 a5+-) 14...ef3 (14...Ne3 15.Qc1 Bf5 16.fe4+-) 15.Ngf3 (15.gf3 Ne3 16.Qe2 Qe7+-) 15...Nd2? (better 15...Ne3 16.Qe2 Qe7+-) 16.Qd2 Ne4 17.Be4 de4 18.Ne5 (18.Ng1 Qe7+-) 18...Be5 19.de5 Qh4 (19...Qg5 20.0-0 Qe5 21.Qd4 Qd4 22.cd4+-) 20.g3 (20.Qf2!? Qh5+-) 20...Qh3 21.Rf1 (21.e6 fe6 22.Rf1 Bf3+-) 21...Rd8 22.Qf2 Bf3 23.a3 (23.Qc2 Qh6 24.Rf2 Qe3 25.Kf1 Bg4+-) 23...Qd7 (better 23...Rd3 24.Qg1 Qh6 25.Rf3 ef3-/+) 24.Qc2+- Qe6 (24...Qf5 25.Rf2 Rd3 26.Rc1+/-) 25.Rf3! ef3 26.Qe4 (26.Rd1!? Rd1 27.Qd1+-) 26...f2 (26...Qb3!? 27.Rc1 Qa3+=) 27.Kf2+/- Rd2 28.Kf3 (28.Kg1 Qh3 29.Qh1 Qh5=) 28...Qh3 (better 28...f5 29.Qf4 A) 29...Rh2 30.e4 Qc4 A1) 31.Qf5? Qe2 (31...Qc3?! 32.Kg4 Qa1 33.Qc8 Ke7 34.Qb7 Kf8 35.Qb8 Kf7 36.Qc7 Kg8 37.Qd8 Kg7 38.Qc7 Kf8 39.Qd8 Kf7 40.Qc7 Kf8 41.Qd8 Kf7 42.Qc7=) 32.Kf4 Rf2 33.Kg5 Rf5 34.ef5 Qe5-+; A2) 31.Re1=; B) 29...Qd5 30.e4 fe4 31.Kg4 Rh2=) 29.e6?? (better 29.Qh4 Qf5 30.Qf4+=) 29...Qg2-+ 30.Kf4 Rf2 31.Kg4 (31.Ke5 f6 32.Kd6 Qe4 33.Kc7 Rd2 34.Kb8 Rd8 35.Ka7 Qc4 36.Kb7 Qb5 37.Kc7 Qb8 38.Kc6 Rc8 39.Kd5 Qe5) 31…Qe4 (31...Qe4 32.Kg5 Qf5 33.Kh6 Qg6) 0-1. Fuirio - kishomat (1710), Rated Classical game, lichess.org, 2013.

4.Nf3 Bb4?? 5.Bg7 Ngf6 6.Bh8 +-.

4.Nf3 c6 5.c4 (better 5.Nc3=) 5...Nb8 (better 5...Ngf6=+) 6.Nc3+- Qc7 (6...Nf6 7.c5+-) 7.cd5 ed5 8.Rc1 Bb4?? (better 8...Nf6 9.Qb3 Qe7+-) 9.Nd5!+- Qa5 (9...cd5 10.Qb3 Double attack (10.Rc7 Pinning; 10.Rc7 Deflection; 10.Qb3 Decoy; 10.Rc7 Clearance)) 10.Nb4 Qb4 (10...Nf6 11.Bc3 Qd8+-) 11.Bg7 Bg4 (11...Nf6 12.Bh8 Nbd7 13.Bc4+-) 12.Bh8 Na6 (12...Nd7 13.Rb1 Qd6 14.Rb7+-) 13.Rc4 Bf3 14.gf3 Qe7 (14...Qd6 15.Rd4 Qh6 16.Ba6 ba6+-) 15.Re4 Nc5 16.Re7 Ne7 17.Qc2 (better 17.Qb1 Rd8 18.Qh7+-) 17...Ng6 18.Qc5 Nh8 19.Qe5 Kd8 20.Qh8 Kc7 (20...Kd7 21.Qa8 f6 22.Rg1 b5 23.Rg7 Kd6 24.Qd8 Ke6 25.Qd7 Ke5 26.d4) 21.Qa8 a6 (21...c5 22.Rg1 a5 23.Rg7 Kd6 24.Qd8 Kc6 25.Qf6 Kc7 26.Qf7 Kd6 27.Bc4 Kc6 28.Qc7) 22.Rg1 h5 (22...c5 23.Rg7 Kc6 24.Rf7 a5 25.Bc4 h5 26.Qb7 Kd6 27.Qd5) 23.Rg7 a5 (23...Kb6 24.Qd8 Ka7 25.Qd4 c5 26.Qc5 b6 27.Qc7 Ka8 28.Rg8) 24.Rf7 Kd6 25.Qd8 Ke5 (25...Ke6 26.Bc4 Ke5 27.d4) 26.d4 Ke6 27.Bc4 1–0. Pierre – Bobby, internet, 2020.

4.Nf3 f5 5.c4 Ngf6 (5...Bb4?? 6.Bg7 Nb6 7.cd5+-) 6.b5 Bd6 7.Qc2 0-0 8.Nc3 Nc5 (8...Nb6 9.cd5 ed5 10.Be2=) 9.a4 c6 10.d3 (10.Be2 e5=) 10...Qe8 (10...dc4 11.d4 Nb3 12.Rb1=) 11.Be2 (11.Ba3 dc4 12.d4 Nce4 13.Bc4 Ba3 14.Ra3 cb5 15.Nb5 Qe7+=) 11...Qg6 (11...dc4 12.dc4 e5 13.Rd1=) 12.cd5 (12.d4 Nce4 (12...Qg2? 13.Rg1 Qh3 14.dc5+-) 13.0-0 c5+=) 12...ed5= (worse is 12...Qg2 13.Rg1 Qh3 14.dc6+-; worse is 12...Nd5 13.Nd5 ed5 14.Ba3+=) 13.g3 Be6 (13...Rb8 14.Ba3=) 14.Nd4 (14.Ba3 Qe8+=) 14...Rac8= 15.bc6 bc6 16.Ba3 Nfd7 17.Nd1 (17.a5 Bf7=) 17...Rc7 18.Rc1 Rfc8 (18...Rb8 19.h3=) 19.a5 Qf7 20.Nf3 (20.0-0 Nb7 21.Bd6 Nd6=) 20...Qe7 21.Bb2 Nb7 (21...Na6 22.Nd4+=) 22.Bc3 (22.Nd4 a6=) 22...Bb4 (22...c5 23.0-0=) 23.a6 Bc3 24.Qc3 Nd6 25.0-0 Bf7 (25...c5 26.Qa5+=) 26.Qa5= Bh5 (26...c5 27.Nc3=) 27.Nc3 Nb6 28.Nd4 Be2 29.Nde2 Qe5 30.d4 Qe7 31.Nf4 Ne4 32.Ne4 (32.Qa2 Qf7=) 32...Qe4 (32...fe4!? 33.Qc5 g5 34.Qe7 Re7+=) 33.Rfd1= Nc4 34.Qb4 (34.Qc5 Nb2 35.Rd2 Nc4+=) 34...Re7 (34...Ne5 35.Qb1 Nf3 36.Kh1=) 35.Qc5+= Ree8? (35...Rec7 36.h3=) 36.Rc3 (36.Qa7 Ra8 37.Qb7 Rec8+/–) 36...Rb8 (better is 36...g5 37.Nd3 Rb8=) 37.Qc6+/– (37.Qa7?! Nd2=) 37...Rb1? (37...Nb6 38.Rdc1+-) 38.Rb1 (better is 38.Qe8! Qe8 39.Rb1 Qa4+-) 38...Qb1 39.Kg2 Qe4 40.Kh3 Nb6 (40...Rd8 41.Rb3 Nd6 42.Qd5 Qd5 43.Nd5+-) 41.f3 Qe7 1–0. Lebel Arias,J – Guggenberger,I, Thessaloniki, 1984.

4.Nf3 f6 5.b5 e5 6.d4 e4 7.Nfd2 Nb6 8.a4 Be6 9.a5 Nc8 10.c4 c6 11.a6 b6 12.bc6 Qd6 13.cd5 Bd5 14.Nc3 Qc6?? (better is 14...Bc6 15.Nde4 Qe7+-) 15.Bb5 (15.Bb5 Nd6 16.Bc6 Bc6 17.d5+-) 1–0. b4_player – story, casual, 2013.

4.Nf3 h6 5.c4 c6 6.Be2 g6?? (better is 6...dc4 7.Bc4 Ngf6=) 7.Bh8+- f6 (7...Bb4 8.cd5 ed5 9.0-0+-) 8.c5 (8.a3 Ne7 9.Nd4 Kf7+-) 8...g5 (8...Qe7 9.Nh4 Qh7 10.Ng6+-) 9.0-0 b6 (9...Qe7 10.Qc2+-) 10.d4 Be7 11.Nc3 b5 12.Nd2 Qc7 13.Qc2 f5 14.f4 (14.a4 ba4 15.Ra4 Bf6 16.Bf6 Ngf6+-) 14...Bb7 15.Bh5 Kd8 16.Be5 Ne5 17.de5 Kd7 18.Bf7 a5 19.a3 g4 (19...Rf8 20.Bg6+-) 20.Bg8 (better is 20.e4!? fe4 21.Nde4 ab4+-) 20...Rg8 21.ba5 (21.Nb3 a4 22.Nd4 Bc8+-) 21...Ba6 (21...Bc5 22.Rfe1+-) 22.Rfd1 (22.Nb3 g3+-) 22...h5 (22...Bc5 23.Re1+-) 23.g3 (better is 23.Nb3 Ke8+-) 23...Bc5 24.Kf2 (24.Nf1 h4+-) 24...Rh8 (24...Be3 25.Kg2+- (25.Ke3?! Qa7 26.Ke2 b4 27.Nc4 Bc4 28.Kd2 Qd4 29.Kc1 Qc3 30.Qc3 bc3=)) 25.Nb3 Ba7 26.a4 h4 27.ab5 cb5 28.Qd2 hg3 29.Kg3 Rh3 30.Kg2 Re3?? 31.Nd4 Rc3 32.Ra2 Rc4 33.Qb2 Bd4 34.Rd4 Rc3 35.Qb4 Rc4 36.Rc4 bc4 37.Rc2 Ke8 38.Kf2 Qc8 39.Ke1 Qc7 40.Kd1 Kf7? 41.Rc3?? Kg6?? 42.h3 1–0. jboger (2210) – beammeupscotty (2145), net–chess.com, 2013.

4.f4 Bb4?? 5.Bg7 e5 6.Bh8 ef4 7.ef4 +-.

5.Bc4 Ngf6 6.a3 Be7 7.Nf3 b6 8.0-0 Bb7 9.Be2 0-0 10.d3 Rc8 11.Nbd2 c5 12.b5 Bd6 13.e4 (13.Nc4 Bc7=) 13...Qc7 14.Nc4 Be7 15.h3 Rfd8 16.Nfe5 Ne4 (better 16...Be4 17.Nf7 Kf7 18.de4 Ne4+=) 17.de4+- Ne5 (better 17...Be4 18.Qa4 Bd5+-) 18.Qc2?? (better 18.Be5 Rd1 19.Rfd1+-) 18...Nc4-/+ 19.Bc4 Be4?? (better 19...Qf4 20.Rae1 Rc7-/+) 20.Qe4+- 1–0. GuestHSHW – GuestTGGZ, freechess.org, 2017.

5.Bc4 Ngf6 6.b5 Be7 7.a4 0-0 8.Nf3 Nb6 9.Be2 Nbd5 10.0-0 Bd7 11.d4 c6 12.Nc3 Bd6 13.Rc1 (13.Nd5 ed5 14.bc6 Bc6=) 13...Qe8 (13...Nc3 14.Bc3 Nd5 15.Ne5=) 14.Qb3 Nc3 15.Bc3 (worse 15.Qc3 cb5 16.ab5 Bb5 17.Bb5 Qb5-/+) 15...cb5 16.ab5 Ne4 (16...a6 17.ba6 ba6 18.Qb6=) 17.Bb2 Qe7 18.Rfd1 Nf6 19.Ne5 Rfc8 (19...a6 20.ba6 ba6 21.Bf3+=) 20.Bf3+- Rab8 21.Nc4 Ne8 (21...a6 22.Ba3 Ba3 23.Na3 Rc1 24.Rc1 ab5 25.Nb5+=) 22.Nd6+- Qd6 23.Ba3 Qb6 24.Bc5 (24.Be2 Qd8+-) 24...Qb5+= 25.Qb5 Bb5 26.Ba7 Ra8 27.Rc8 Rc8 28.Rb1 (28.Bb7? Rc7-+) 28...Bd3 29.Rd1 (29.Bb7? Rc7 30.Bb8 Bb1 31.Bc7 Nc7-+) 29...Ba6 (29...Bb5 30.h3+= (30.Bb7? Rc7-+)) 30.h4 h6 (30...Nd6 31.Rb1+=) 31.Rb1+- Nd6 32.Bc5 Nf5 33.g3 Rc7 34.Be4 g6 35.Rb6 Ne7 36.Rd6 Nc6 (36...Nc8 37.Rd8 Kh7 38.Ba3+=) 37.d5 (37.Kg2 Kg7+-) 37...ed5 (37...Ne5 38.Rd8 Kh7 39.Bd4 Rc1 40.Kh2 Ng4 41.Kh3+=) 38.Bd5 Kh7 39.Bb6 Re7 40.Bc5 (40.Bc6 bc6 41.Rc6 Bb7+-) 40...Rc7+= 41.Bb6 Re7 42.Kg2 g5 (42...Nb4 43.Bb3 Nc6 44.f4+=) 43.Bc5 Rc7 (43...gh4 44.gh4 (44.Bc6?! bc6 45.gh4 Re6+=) 44...Rc7 45.Ba3+-) 44.Be4 Kg7 45.h5 (45.Ba3 f6+-) 45...Be2 (45...Bc4 46.Bb6 Rc8 47.Rd7+=) 46.f3 (46.Ba3 Bh5 47.Bb2 Kf8 48.Rh6 Bg4+-) 46...Bc4 (46...g4 47.f4+-) 47.Bb6 (better 47.Rh6 g4 48.Rd6 gf3 49.Bf3+-) 47...Re7? (47...Rc8 48.Rd7+-) 48.Kf2 (better 48.Bc6 bc6 49.Bd4 Kh7 50.Rd8+- (50.Rc6?! Be6+-)) 48...Be6 (48...Re6 49.Rd7 g4 50.Rb7 gf3 51.Bf3+-) 49.g4 (49.Bc6!? bc6 50.Bd4 f6 51.Rc6 Kf7+-) 49...Rd7 50.Bc5 Rd6 51.Bd6 Na5 52.Kg3 (52.Bc7 Nc6+-) 52...Nc4+= 53.Bc5 b6 54.Bd4 f6 55.f4 b5 56.f5 (56.Bc5 Nd2 57.Bc6 Nf1 58.Kg2 Bc4+=) 56...Bf7= 57.Bd3 b4 58.Bc4 (58.Kf3 b3=) 58...Bc4 59.e4 b3 60.e5 fe5 61.Be5 Kh7 62.Bb2 Bf7 63.Bc3 Bc4 ½–½. BeepBeepImAJeep – BeepBeepImAJeep01, lichess.org, IM BeepBeepImAJeep simul, 2018.

5.Bc4 Ngf6 6.b5 Be7 7.Nf3 0-0 8.Qb3 Nc5 9.Qc2 a6 10.d4 (10.Bf6 Bf6 11.d4 ab5 12.Bb5 Na6=) 10...ab5 11.dc5 (11.Bb5!? Na6 12.Ba3=) 11...bc4-/+ 12.Qc4 c6 13.0-0 b6 (13...Qd5 14.Rc1-/+) 14.cb6? (better 14.Qc2=) 14...Ba6-+ (14...Qb6?! 15.Qc2=) 15.Qc6 Bf1 16.b7? (16.Kf1 Qd3 17.Ke1 Rac8-+) 16...Rb8 (better 16...Ra6 17.Qc1 Bd3-+) 17.Kf1 Qd3 18.Ke1 Bb4 19.Nbd2 Bd2?? (19...Ne4 20.Rd1 Rfd8-+) 20.Nd2= Nd5 21.Be5? (better 21.Rb1 Rfd8 22.Bd4=+) 21...Nb4-/+ 22.Rc1?? (better 22.Qe4 Rb7! 23.Kd1-+ (23.Qb7?? Nc2 24.Kd1 Rd8-+)) 22...Nc6-+ 23.Bb8 Rb8 24.Rc6 (24.h3-+) 24...h6 (better 24...Rd8 25.f3 Qd2 26.Kf1 Qa2-+) 25.Rc8+= Kh7 26.Rb8 Qb1?? (26...Qb5 27.a4 Qb6 28.e4+=) 27.Ke2 (better 27.Nb1 Kg6 28.Rg8+-) 27...Qb5= 28.Kf3 (28.Ke1 Qb6 29.e4 Qc7=) 28...Qc6 (better 28...Qh5 29.g4 Qh2-/+) 29.Kg3?? (better 29.e4 Qc7 30.Rc8 Qb7 31.Rc2=+) 29...Qc7 30.f4 Qb8 31.Ne4 Qb7 32.h4 (32.Nf2-+) 32…Qe4 (32...Qe4 33.Kf2 e5 34.fe5 Qh4 35.Kf3 Qh5 36.Kf2 Qe5-+) 0-1. upep - theo (1805), Rated Classical game, lichess.org, 2013.

5.c5 c6 6.Nf3 b6 7.d4 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 bc5 11.bc5 Be7 12.Bd3 0-0 13.Qc2 Qc7 14.0-0 g6 15.Nbd2 Rd8 16.Ne5?? (better is 16.Bc3+/–) 16...Ne5-/+ 17.de5 Nd7 18.Nb3 Ne5 19.Be2 f6 (19...Nc4 20.Bc4 dc4 21.Qc4-/+) 20.f4 Nf7 21.g4 Rf8 22.h4 Nh8 (better is 22...Bd7!?-/+) 23.Qc3+= Kf7 24.Nd4 h6 25.Bd3 g5 26.h5? (26.hg5 hg5 27.Qb2 gf4 28.ef4 Bc5+=) 26...e5 (better is 26...gf4!? 27.ef4 Rg8-/+) 27.Nf5 Bf5 28.Bf5 gf4 29.ef4 ef4 30.Rb1? (better is 30.Qc2!?=) 30...Rb8 31.Rb8 Qb8 32.Qa5? (32.Kg2 Kg7 33.Qe1 Qa7-+) 32...Kf8 (32...Qb3!? 33.Qc3 Qc3 34.Bc3 Bc5 35.Kf1-+) 33.Bd4 Nf7 34.Qb6 Qe8 (better is 34...Qa8!?-+) 35.Bg6? (better is 35.Qb7!?-/+) 35...Bd8-+ (35...Bd8 36.Qb8 Qe1 37.Kg2 Qe2 38.Bf2 Qg4 39.Kf1 Qh3 40.Ke2 f3 41.Ke3 Qd7 42.Kf3 Ne5 43.Kg2 Ng6 44.hg6 Kg7-+). Kuhlmann,Antonius Egidius J – van Onzen, corr, 1952.

5.cd5 Nd5 6.a3= a6 7.Nf3 h6 (7...N7f6 8.Be5=) 8.Qc2 N5f6 (8...c6 9.Nc3+=) 9.Be2 g6 (9...c5 10.bc5 Bc5 11.d4+=) 10.0-0 Bg7 11.Ne5 Ne5 (11...0-0 12.Rc1+=) 12.Be5+- 0-0 (12...Bd7 13.Bf3 (13.Qc7? Qc7 14.Bc7 Nd5-+) 13...c6 14.d4+-) 13.Bc7 (13.Qc7? Qc7 14.Bc7 Nd5-+) 13...b5?? (better 13...Qe7 14.Be5 Bd7+-) 14.Bd8+- (14.Bd8 Rd8 15.d4+-) 1–0. GuestCCBG – ardianjMN, freechess.org, 2017.

5.bc5 Nc5 6.Bb5 Nd7 7.0-0 Ngf6 8.Bf6 Qf6 9.d4 Bd6 10.c4 a6 11.Bd7 Bd7 (worse 11...Kd7 12.cd5 ed5 13.Nc3+/-) 12.Qb3 0-0 (12...dc4!? 13.Qb7 Ke7=) 13.cd5 ed5 14.Nc3 Qh6 15.Nd5 Bc6 16.e4 a5 17.e5 a4 18.Qc4 Ba3 19.Rab1 Qe6 (19...Rfd8!? 20.Qd3 Bd5 21.Qa3 Qe6+=) 20.Nb6+/- Qc4 21.Nc4 Be7 22.Nb6 Ra6 23.d5 Be8? (better 23...Rb6 24.Rb6 Bd5+-) 24.Nc8 White plans d6 24...Bd8 25.Rb7 a3 (25...Ra5 26.Rd1+-) 26.Rc1 Ba5 (26...Ra5 27.d6 Rb5 28.Ra7+-) 27.Ne7 Kh8 28.d6 (28.Rc8!? g6+-) 28...Ba4 29.Ng5 (29.Ng5 Raa8 30.Rc4+-) 1-0. DEFFM – GuestNNTV, freechess.org, 2021.

5.bc5 Nc5 6.Ne5 Qd6 (6...Nf6 7.c4=) 7.Qh5+= Nh6 8.Bd4 (8.Bb5 Bd7 9.Nd7 Nd7+=) 8...Nd7 9.Bb5 a6 10.Bd7 Bd7 11.Nc3 (11.g4 Ba4 12.g5 g6+/–) 11...Nf5?? (better is 11...b5=) 12.Nf7+- (12.Nf7 g6 13.Nd6 Bd6 14.Qg4+-; 12.Qf7?! Kd8+-) 1–0. pierre – colly, internet, 2011.

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

5.b5 b6 6.c4 Bb7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Nbd7).

5.b5 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

5.b5 c5 6.bc6= bc6 7.c4 Opening the b–file gets Black a lot of play (7.Nc3 e5=) 7...Rb8+= 8.Qc2 (8.Be5 Ne5 9.Ne5 Qc7+=) 8...Qb6 9.Bd4 (9.Bc3 Bd6+=) 9...c5 10.Bc3 Ba6 (10...Bd6 11.Be2+=) 11.Na3= Bd6 12.Be2 (better is 12.Rb1 Qd8 13.Rb8 Bb8 14.Qa4=) 12...Ne4 (better is 12...0-0!?=) 13.Rb1+/– Qc6 14.Rb8 Bb8 15.Bb2 (15.cd5 ed5 16.Ba6 Nc3 17.Qc3 Qa6 18.Qg7 Rf8+=) 15...0-0= 16.0-0 (16.d3 Nef6=) 16...Qd6 17.g3 (17.Nb5 Bb5 18.cb5 Ng5=) 17...f5 (17...Nef6 18.Nb5 Qb6 19.a4=) 18.d3 Nef6 19.d4 (19.cd5 ed5 20.Rb1 Bc7=) 19...Ne4 20.dc5 Qc5 (20...Ndc5 21.Be5 Qe7 22.Rc1=) 21.Nd4 Re8 22.cd5 (22.f3 Ng5=) 22...Be2 (22...Qc2 A) 23.Ndc2? Be2 (23...ed5?? 24.Ba6 Be5 25.Bd4+-) 24.Re1 Bd3-+; B) 23.Nac2 Be2 24.Ne2 ed5 25.Nb4+=) 23.Qc5 (23.Qe2!? Qd5 24.f3=) 23...Ndc5+= 24.Ne2 Nd3 25.Ba1 (better is 25.Bd4 ed5 26.Nb5=) 25...e5 (25...ed5 26.Bd4 Bd6=) 26.Nb5 (26.Nc1 Ndc5+/–) 26...Nb4 (26...Rc8!?+=) 27.Nec3 Nf6 (27...a6 28.Ne4 ab5+/–) 28.d6 (28.Rd1!?+-) 28...Rd8 (28...a6 29.Nc7 Rd8 30.Rd1+=) 29.Rd1 Kf7 (29...a6 30.Nc7 Rd7 31.N3d5 Nbd5 32.Nd5 Nd5 33.Rd5 Rd6 34.Rd6 Bd6 35.f4+=) 30.a3+/– Na6 (30...Nc6 31.Kg2+/–) 31.Na4 (31.Nd5 Ke6 32.Ne7 Rd7+/–) 31...Ke6 (31...Nc7 32.Nc7 (32.dc7? Rd1 33.Kg2 Bc7-+) 32...Bc7 33.dc7 Rd1 34.Kg2 Ra1 35.c8Q+-) 32.f4 ef4 33.ef4 Bd6 34.Nd4 (better is 34.Bf6!? gf6 35.Na7+- (worse is 35.Nd6 Rd6 36.Rd6 Kd6+=; worse is 35.Rd6 Rd6 36.Nd6 Kd6+=)) 34...Kf7= 35.Rb1 (35.Bb2 Bc5=) 35...Nc5 (35...Ba3 36.Rb7 Rd7 37.Rd7 Nd7 38.Nf5+=) 36.Nc3 (36.Nc6 Rd7 37.Bf6 Kf6+=) 36...Kg6 (36...Bf4 37.Nf5 Be5 38.Na4 Ba1 39.Nc5=) 37.Ncb5 (37.Nc6 Rd7 38.Nb5+=) 37...Rb8 (better is 37...Nce4!?=) 38.Nc6+= Rb7 39.Nca7 (39.Rb2 Bb8 40.Nba7 Ra7 41.Rb8 Ra3+=) 39...Nce4 (39...Nfe4 40.Nc6+/–) 40.Nc6+/– Bc5 41.Kg2 Nd5 42.Nc3 (42.Ne5!? Kh5 43.h3+=) 42...Ne3= 43.Kh1 Nf2 44.Kg1 Nh3 45.Kh1 Nf2 46.Kg1 Rb1 (46...Nh3 47.Kh1 Nf2=) 47.Nb1+= ½–½. Skopintseva,Yulia – Chernov,Pavel, Tula–ch op, 2001.

5.b5 Bd6 6.d4 c6 7.a4 Qc7 (7...0-0 8.Bd3=+) 8.c4= Ng4 (8...0-0 9.Nbd2=) 9.h3 Ne3 (better 9...Ngf6=) 10.fe3+- Bg3 11.Kd2 dc4 (11...Nf6 12.Nc3+-) 12.Bc4 Nf6 13.Qc2 c5 (13...Bd7 14.Ne5+-) 14.Bd3 b6 (14...cd4 15.Bd4 (worse 15.ed4 Qd8+-) 15...Qd8 16.Rd1+-) 15.dc5 bc5 16.Bf6 gf6 17.Be4 (17.Qc3 Qe7+-) 17...Rb8 (17...Bb7 18.Bb7 (18.Bh7?! f5+=) 18...Qb7 19.Rd1+- (19.Qc5?! Rc8 20.Qa3 Rg8+-)) 18.Bc6 (18.Bh7?! f5 19.Bf5 ef5+=) 18...Bd7 19.Qc5 Rd8 (19...Rg8 20.Nd4+-) 20.Ke2 Qa5 (20...Bd6 21.Bd7 Qd7 22.Qc6+-) 21.Rd1 Qc7 (21...Bc6 22.Qc6 Kf8 23.Qc3+-) 22.Nc3 Bc6 23.Rd8 Kd8 24.bc6 Bd6 25.Qc4 Rg8 (25...Ke7 26.Nb5 Qb6+-) 26.Nb5 Rg2 (26...Qb6 27.Rd1 Rg2 28.Kf1+-) 27.Kf1 (27.Kf1 Rg3 28.Nc7 Kc7 29.Qb5 Rf3 30.Kg2 Rg3 31.Kf2+-) 1–0. GuestWTJX – GuestCKTX, freechess.org, 2019.

5.b5 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Nbd7).

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

5.c4 Nb6 6.c5+- Nd7 7.Qa4 (7.Nc3 a5 8.a3 Be7+-) 7...c6 8.Bd3 (8.Be2+-) 8...Nb8 (better 8...e5!? 9.Ne5 Qg5+=) 9.0-0 Nd7 10.Na3 Bc5? (better 10...Nf6+-) 11.Bg7 b5 (11...Rg8 12.Bh6 Bd6+-) 12.Qb3 (12.Qc2 Bb4 13.Qc6 Rb8 14.Nb5 Rg8 15.Bh6 Rb6+-) 12...a5 (12...Rg8 A) 13.bc5?! Rg7 14.Be2 Nf5+= (14...Nc5? 15.Qc3 Nf5 16.Qc5+-); B) 13.Bh6 Bd6 14.Bh7+-) 13.bc5 Nc5 14.Qc3 (14.Bh8 Nb3 15.ab3 f6+=; 14.Bh6 Nb3 15.ab3 Ba6=) 14...Nd3 (14...Rg8 15.Bh6 Nd3 16.Qd3+-) 15.Bh8 Nb4 16.Qg7 Ke7 (16...Kd7 17.Qh7 Ba6+-) 17.Qg5 Kd7 18.Ne5 Kc7 19.Nb5! cb5 (19...Kb7 20.Qd8 Nf5 21.Qc7 Ka6 22.Rfc1 c5 23.Rc5 Ne7 24.Qd6 Nec6 25.Rc6 Nc6 26.Qc6) 20.Rfc1 Kb6 (20...Kb7 21.Qd8 Rb8 22.Rc7 Ka6 23.Rc8 Rc8 24.Qc8 Ka7 25.Nd7 Nf5 26.Qb8 Ka6 27.Nc5) 21.Qd8 Kb7 (21...Ka7 22.Qa5 Kb7 23.Qb5 Ka7 24.Rc7 Bb7 25.Qb7) 22.Rc7 Ka6 23.Qd6 Nc6 24.Qc6 1–0. Pierre – Lucas, internet, 2020.

5.c4 dc4 6.Bc4 Nf5 7.b5+=.

5.c4 c6 6.a4 (6.cd5 ed5 7.b5 Rb8+=) 6...Ng4 (6...Nf6 7.Qb3=) 7.cd5+= cd5 8.Qb3 (better 8.a5+=) 8...Bb4?? (better 8...a5 9.ba5 Nc5+=) 9.Qb4+- Ngf6 10.Nc3 a5 (10...a6 11.Ba3+-) 11.Qd6 (better 11.Qa3 Ne4 12.Nb5+-) 11...h6 (11...Ne4 12.Ne4 de4+-) 12.Nb5 Qb6 13.Ba3 Qd6 14.Nd6 Ke7 (14...Kf8 15.Nc8 Kg8 16.Rc1+-) 15.Nc8 Kd8 16.Nd6 Kc7 17.Rc1 Kb8 18.Nd4 Ne5 (18...Rf8+-) 19.Rb1 Ra7 20.f4 Nc4 21.Bc4 dc4 22.Nc6 Ka8 23.Na7 Ka7 24.Rb7 Ka6 25.Bc5 Ra8 26.Rb6 Ka7 27.Nb5 1–0. Pierre – Tisauhy, internet, 2020.

4.b5 Bd7 5.Nf3 c6 6.a4 cb5 (6...f6 7.Be2=) 7.ab5+= b6 (7...f6!?+=) 8.Bd3 Nc8 9.0-0 Nd6 10.Qe2 Be7 (10...Qc7!?+-) 11.Bg7+- Rg8 12.Bb2 f6 (12...Bf6 13.Ne5+-) 1–0. DEFFM – GuestHZYM, freechess.org, 2020.

4.c3 Bd7 5.e4 (better is 5.Nf3!?=) 5...de4-/+ 6.g4 (6.d4 a5-/+) 6...f5 (6...Ng6 7.Qc2-+) 7.gf5 ef5 8.Nh3 (8.d3 Bc6-+) 8...Nd5 (better is 8...Ng6-+) 9.Nf4?? (better is 9.d3 Nf6 10.de4 fe4 11.Ng5-/+) 9...Nf4 10.Rg1 (10.c4 Nc6 11.a3 Be6-+) 10...Qe7 11.c4 (11.Be2 Qh4 12.Bf1 Qh2-+) 11...Rg8 (11...Nc6 12.a3-+) 12.Nc3 (12.b5 Qh4 13.h3 Nh3 14.Bh3 Qh3-+) 12...Nd3 13.Bd3 ed3 14.Ne2 (14.Kf1 Qb4 15.Qb3 Qb3 16.ab3 Na6-+) 14...de2 (14...Qb4!? 15.Nc3 Qb2 16.Rb1-+) 15.Qe2 Qe2 (16.Ke2 Bb4 17.Rg7 Rg7 18.Bg7 Nc6-+) 0–1. Cook,Stephen Kenneth – Slothouber,Frans, IECG Cat–C, 1995.

4.c3 Nd7 =+.

4.c4 dc4 5.Bc4 Bd7 6.Qf3 Bc6 7.Qg3? (better 7.e4!?=) 7...Nf5-/+ 8.Qg4 Nd7 (better 8...h5 9.Qh3 Qh4 10.Qh4 Nh4-/+) 9.Nc3?? (better 9.b5!? h5 10.Qh3=+) 9...Nf6 (better 9...Ne5 10.Qh3 Nc4-+) 10.Qf4?? (better 10.Qh3 Bb4 11.Nf3-/+) 10...Bd6-+ (10...Bb4?! 11.Bb5 Bb5 12.Qb4-/+) 11.Qg5 (11.Nge2 Bf4 12.Nf4 Nh4-+) 11…h6 (11...h6 12.b5 hg5 13.bc6 bc6-+) 0-1. Fuirio (1660) - souzamar (1690), Rated Classical game, lichess.org, 2013.

4.Nf3 Nf5 5.b5 Qd6 (5...f6 6.Be2=) 6.Bd3 Ne7 7.Be5 (7.e4 Ng6=) 7...Qb6 (7...Qd8 8.Bc3=) 8.a4 (8.Bd4 Qd6+=) 8...a6 (8...f6 9.a5 Qc5 10.Bb2=) 9.0-0 a5 (9...ab5 10.ab5 Ra1 11.Ba1+=) 10.Ng5 (better 10.Bd4 Qd6 11.e4+=) 10...Nbc6? (10...Ng6 11.f4 Nd7+-) 11.bc6+- Nc6 12.Bb5 Bd7 (12...Ke7 13.Bc6 Qc6 14.Qh5+-) 13.Bc6 Bc6 (13...Qc6 14.Qh5 Qc2 15.Qf7 Kd8 16.Nc3+-) 14.Qf3 f6 15.Bf6! gf6 (15...Kd7 16.Bd4 Bc5 17.Qf7 Kc8 18.Bg7+-) 16.Qf6 (16.Ne6?! Kf7 17.Nf4 Bd6 18.Nd5 Bd5 19.Qd5 Kg7+-) 16...Kd7 (16...h6 17.Qg6 Kd8 18.Nf7 Kd7 19.Nh8 Qb4+-) 17.Qe6 Kd8 18.Nf7 1–0. DEFFM – GuestGZKL, freechess.org, 2018.

4.Nf3 f6 5.a3 =.

4.Nf3 Ng6 5.b5 b6 6.Be2 (6.h4 Ne7+=) 6...Nd7 (6...a6 7.a4=) 7.0-0 (7.Nc3=) 7...Bd6 (7...a6!?=) 8.Bg7+- Rg8 9.Bb2 Bb7 (9...a6 10.Nc3+-) 10.d4 (10.Ba3 Ba3 11.Na3 Qe7+-) 10...a6 (10...Nh4 11.g3+-) 11.a4 (11.Ba3 Ba3 12.Na3 e5+-) 11...ab5 (11...Nh4 12.g3+=) 12.ab5+- Ra1 13.Ba1 c6 14.bc6 Bc6 15.Nc3 (15.Bd3 Qf6+-) 15...Nf6 (15...Nh4 16.g3+-) 16.Nb5 (16.Qb1 Ne4 17.Bb5 Qc7+-) 16...Bb5 (16...Bb8 17.Bd3+-) 17.Bb5 Kf8 18.g3 (18.c4 Ne4+-) 18...Ne4 (18...Kg7 19.c4+-) 19.Bd3 (19.c4 Nh4 20.Ne1 Qa8+-) 19...f5 (19...Nf6 20.c4+-) 20.c4+- Qa8 (20...Ne7 21.Qb3+-) 21.Qb3 dc4? (better 21...Qc6+-) 22.Bc4 (22.Qc4?! Ke7+-) 22...f4 (22...Ne7 23.Be6 Rg6 24.Bb2+-) 23.Be6 (23.ef4?! Nf4 24.Qb6 Ke7+-; 23.Qb6?! Ke7+-) 23...Rg7 24.Bd5 Qe8 25.Be4 Qe4 26.Ng5 (26.ef4?! Nf4 27.Re1 Qd3 28.Qd3 Nd3+-; worse 26.Qb6 Rd7 27.Qb5 Rb7+-) 26...Qf5 (26...Qe7 27.Ne6 Kg8 28.Ng7 Kg7 29.ef4+-) 27.Ne6 Ke7 (27...Kg8 28.Ng7 Kg7 29.Qb6 f3+-) 28.Ng7 Qh3 (28...Qe4 29.ef4 Kf8 30.Ne6 Ke7 31.Ng5+-) 29.Qd5 fg3 (29...f3 30.Nf5 Kf6 31.Qd6 Kg5 32.Nh4 Nh4 33.gh4 Kh5 34.Qe5 Kg6 35.Qg5 Kf7 36.Rc1 Qg2 37.Qg2 fg2 38.Rc7 Ke6 39.Rh7+-) 30.fg3 Bg3 31.Rf7 1–0. DEFFM – GuestCZLD, freechess.org, 2018.

4.Nf3 h6 5.a3 Bd7 6.Be2 Ng6 7.0-0 f6 (7...Nh4 8.Ne5 Bd6 9.f4+=) 8.c4+/– c5 (8...dc4 9.Bc4 Bd6 10.Nd4+/–) 9.b5 (9.Qc2 Kf7 10.cd5 cb4+-) 9...b6 (9...dc4 10.Qc2 f5 11.Bc4+/–) 10.Nc3 a6 11.a4 (11.Qb3 ab5 12.cd5 e5+-) 11...ab5 (11...dc4 12.Bc4 ab5 13.Nb5+/–) 12.ab5 Ra1 13.Qa1 Bd6 14.cd5 e5 15.d4 0-0 (15...cd4 16.ed4 Nf4 17.Re1+-) 16.Bc4 (16.dc5 Bc5 17.Rd1 Bf5+-) 16...Bg4 (16...cd4 17.Ne4 Bb4 18.Qa4+/–) 17.Nd2 (17.de5 Bf3 18.ed6+/–) 17...Nd7? (better is 17...ed4!? 18.ed4 Bf4+/–) 18.Nce4+- Qe7 (better is 18...Bb8+-) 19.Nd6 Qd6 20.Ne4 Qb8 21.d6 (21.h3 Bf5 22.Ng3 Nh4 23.d6 Kh8 24.Nf5 Nf5+-) 21...Kh8 22.Qa6?? (22.f3 Bf5 23.Ng3 Nh4 24.de5 fe5 25.Be5 Ne5 26.Qe5 Re8+-) 22...Qa8? (better is 22...f5 23.Be6 Rd8+/–) 23.Qa8+- Ra8 24.Ra1 (24.dc5 bc5 25.Rc1 Ngf8+-) 24...Ra1 25.Ba1 f5 (25...cd4 26.ed4 ed4 27.Bd4 Nf4+-) 26.dc5 fe4 27.c6 Nc5 28.Bf7 Nf8 (28...Kh7 29.Be8+-) 29.Be5 Be6 (29...Nfd7 30.Bd4 h5+-) 30.Be6 Nfe6 31.c7 Nc7 32.dc7 1–0. Trkn – cybarb, itsyourturn.com, 2000.

4.Qg4 Rg8 (4...e5 5.Qh5 Nbc6 6.Be5 Nb4 7.Na3+=) 5.Bd3 g6 (5...e5 6.Qh5 e4 7.Be2=) 6.b5 f5 7.Qd1 Bd7 8.Nf3 Qc8 9.a4 a5 10.c4 c5 11.Be2 b6 12.Ng5 h6 13.Nf3 Bg7 14.d4 (14.Bg7 Rg7 15.d4 Rg8+/–) 14...cd4 15.ed4 Qc7 (15...dc4!? 16.Na3 c3+/–) 16.Nbd2 Bc8 17.Nb3 (17.Rc1!? Qd8+-) 17...Nd7 18.cd5 Nd5 19.Qd2 Qf4 20.Qf4 (20.0-0!?+=) 20...Nf4+= 21.Bf1 Nd5 (21...Bb7 22.Nbd2+=) 22.Be2 (22.Rc1 Bb7=) 22...Bf8 23.0-0 Nf4 24.Bc4 Nd5 (better is 24...Bb7!?=) 25.Rfe1+/– Kf7 26.Re2 (26.Re6 Ke6 27.Re1 Kd6 28.Ba3 Kc7 29.Bd5 Bb7 30.Rc1 Kb8 31.Bg8 Ba3+/–) 26...N7f6 (26...Nf4!? 27.Re3 Bb7=) 27.Ne5+/– Kg7 28.Nc6 Bd7 29.Ne5 (better is 29.Rc1+/–) 29...Bd6?? (better is 29...Bc8=) 30.Nd7+- Nd7 31.Re6 (31.Re6 Bh2 32.Kh2+-) 1–0. pittol – haffffo, gameknot.com, 2014.

4.a3 Bd6?? 5.g3 (better is 5.Bg7 Nf6 6.Bh8+-) 5...c6?? (better is 5...Nf6=) 6.Bg7+- 1–0. Fournier,Frederic (1630) – bilbonof, rated blitz game (3/0), 2002.

4.a3 Nd7 5.Nf3 Ngf6 6.Be2 Bd6 7.c4 c6 8.Nc3 0-0 9.cd5 ed5 10.0-0 Ne4 11.d3 Nc3 12.Bc3 Qe7 13.Nd4 Ne5 14.b5 c5 15.Nf3 Ng4 16.h3 Nf6 17.a4 Bd7 (17...f4 18.ef4 Bf4 19.Bd2 Bd2 20.Qd2=+) 18.Ng5 a6 19.Nf3? (better 19.Qb3!? ab5 20.ab5 Ra1 21.Ra1=) 19...ab5-/+ 20.ab5 Bb5 21.Qc2 Bc6 22.d4 c4 23.Ne5 Ne4 24.f3 (24.Rfc1 Be5 25.de5 Nc3 26.Qc3 Ra1 27.Ra1 Re8-/+) 24...Ng3 25.Rf2 Ra1 26.Ba1 Ra8 27.Bc3 Be5 (worse 27...Ne2 28.Re2 Bd7 29.Nd7 Qd7 30.e4 fe4 31.fe4 de4 32.Qe4-+) 28.de5 b5 29.Qb2 Ra4 Black plans b4 (29...Ne2 30.Re2 Ra4 31.Bd4-+) 30.Kh2 (30.Bd1 Ra7-/+) 30...b4 (30...Ne2 31.Re2 b4 32.Bd4-+) 31.Kg3 bc3 32.Qc3 Qg5 (better 32...Ra3 33.Qd4 Qg5 34.Kh2 Qe3 35.Qe3 Re3-+) 33.Kh2=+ Ra2 34.Qd4 h5 35.e6 (35.e4 Qf4 36.Kg1 Kh7=) 35...f4 (35...h4 36.Qc5 Ra1 37.Rf1=) 36.e4 (36.Qf4? Qf4 37.ef4 c3-+) 36...Qg3 (better 36...Qf6!? 37.Qc5 Qe6 38.Bc4 Rf2 39.ed5 Rg2 40.Kg2 Qg6 41.Kh1 Bd7=) 37.Kg1+= Ra1?? (better 37...de4 38.Qc4 Ra1 39.Rf1 Re1 40.e7 Kh7 41.Re1 Qe1 42.Bf1 ef3 43.Qc6 f2 44.Kh2 Qf1 45.Qe4 g6 46.Qf4 Qg1 47.Kg3 f1Q 48.Qf1 Qf1=) 38.Bf1 (better 38.Qa1!? de4 39.Bc4 e3+-) 38...c3?? (38...Rf1 39.Rf1 de4 40.Qc4 ef3+-) 39.Qc3 (39.ed5 Bb5 40.e7 Kf7 41.e8Q Ke8 42.Qe5 Kd7 43.Qe6 Kc7 44.d6 Kb8 45.Qg8 Ka7 46.Ra2 Ra2 47.Qa2 Kb6+-) 39...Bb5 (39...Rf1 40.Rf1 Be8 41.ed5 Qg6+-) 40.Qa1 Bf1 (40...Be8 41.ed5 Qg6 42.Qe5+-) 41.Qf1 (better 41.Qa8!? Kh7 42.Rf1 Qg5+-) 41...de4 (41...Qg5 42.Qb5 Kh7 43.Qd7 de4 44.e7+-) 42.fe4 (42.Qc4 e3 43.e7 Kh7 44.Qe4 Kh6 45.Re2 Qg5 46.e8Q Qf6 47.Qh8 Kg5 48.Qd5 Qf5 49.Qg7 Kh4 50.Qd8 Qg5 51.Qgg5) 42...Qe3 (42...Qb3 43.Rf4 Qe6 44.Qb5+-) 43.Kh2 (43.Qc4 Kf8 44.Qc8 Ke7 45.Qd7 Kf6 46.Qf7 Ke5 47.e7 Qc1 48.Kh2+-) 43...Qe4 (43...Qg3 44.Kh1 Qb3 45.Rf4 Qe6 46.Qb5+-) 44.Rf4 (44.Re2 Qa4+-) 44...Qe6 45.Rf8 (45.Rf8 Kh7 46.Qd3 g6 47.Qd4+-) 1-0. muhammadaudii (2150) - abomalik123 (2025), lichess.org, 2020.

4.b5 c6 5.a4 Bd7 6.Nf3 h6 (better 6...Nf6!?+=) 7.Ne5+/- Nf6 8.Ng6 (8.Be2 h5+/-) 8...Rg8 9.Bf6?? (better 9.Nf8 Rf8 10.Be2+=) 9...Qf6-+ (worse 9...gf6 10.Qh5 Bg7 11.c4+=) 10.Qh5?? (better 10.Nf8 Qa1 11.Nd7 Nd7 12.c4-+) 10...Kd8 (better 10...Qa1 11.Nf8 Kf8-+) 11.Nf8? (11.Qh4 Bd6=+) 11...Rf8?? (better 11...Qa1 12.Qf7 Qb1 13.Ke2 Rf8 14.Qf8 Kc7 15.bc6 bc6 16.Qg7 Qc2-+) 12.d4 Be8 (12...f4 13.Qe2=) 13.Qf3 Qe7 (13...e5 14.de5 Qe5 15.Ra3=) 14.Nc3 Qb4 15.Kd2 Nd7 16.Qg3 (16.bc6 bc6 17.Rb1 Qe7+=) 16...g5 (16...f4 17.Qh4 g5 18.Qh6 fe3 19.fe3 Rf2 20.Be2 Nf6-+) 17.Rb1 c5?? (better 17...Qe7+=) 18.Rb4+- cb4 19.Ne2 Nb6 (19...a5 20.h4 g4 21.Qd6+-) 20.Qd6 Nd7 21.Qb4 (21.Qe6 Rf6 22.Qd5 Rb8+-) 21...a5 (21...Bf7 22.Qd6+-) 22.Qd6 Rc8 (22...Bf7 23.h4+-) 23.Qe6 Bf7 (23...Rf6 24.Qd5 b6 25.Qf3+-) 24.Qh6 Nb6 (24...Rg8 25.h4 Rg6 26.Qh7+-) 25.Qg5 (better 25.Qf8 Be8 26.Qd6 Nd7 27.Qd5 Ke7+-) 25...Ke8 (25...Kc7 26.Ng3 Kb8 27.Nf5+-) 26.Nf4 Nc4 27.Bc4 dc4 28.c3 (28.Qf5 Rc7+-) 28...Rg8 29.Qf5 Rd8 30.Qe4 Kf8 31.Qb7 Re8 32.Qc7 Rg7 33.Qa5 Bg8 34.Qb4 Rge7 35.Ng6 Kf7 36.Ne7 Re7 37.Qc4 (37.b6 Rb7 38.Qc4 Kg7+-) 37...Kf8 38.Qc8 Re8 39.Qf5 Bf7 40.c4 (better 40.b6!? Ke7+-) 40...Re7 41.c5 Ke8 42.a5 (42.Qc8) 42...Be6+- 43.Qh5 Kd7 44.b6 (44.c6 Kd8 45.Qh8 Kc7+-) 44...Bf7 45.Qf3 Re8 46.Qf7 Re7 47.Qd5 (47.c6 Kd6 48.Qf6 Re6 49.Qd8 Kc6 50.Qc7 Kb5 51.Rb1 Ka4 52.Qc4 Ka5 53.Qb5) 47...Ke8+- 48.a6 Rd7 49.Qg8 (49.Qe6 Re7 50.Qg8 Kd7 51.a7 Rg7 52.Qg7 Kc6 53.a8Q Kb5 54.Rb1 Kc4 55.Qf7) 49...Ke7+- 50.a7 Rd8 51.Qg5 (51.Qg5 Ke6 52.Qd8 Kf7 53.Qd6 Kg7 54.Qe6 Kh7 55.a8Q Kg7 56.Qag8) 1-0. Fuirio (1645) - FONFON_O_CARA, Rated Classical game, lichess.org, 2013.

4.b5 Bd7 5.a4 c5 6.Be5 Nf6 7.Bf6 (7.Nf3 Ng4=) 7...gf6 (7...Qf6!? 8.d4 f4=+) 8.Qh5 Ke7 9.Nf3 Qe8 (9...a6 10.Nc3=) 10.Qh4 Qf7 11.Ne5 Qe8 (11...Qg7 12.d4=) 12.Qf6?? (better 12.c4+/-) 12…Kf6-+ (12...Kf6 13.f4 Bd6-+) 0-1. Yuris__ - Meser, Rated Classical game, lichess.org, 2013.

4.Bb5 Bd7 5.Qh5 g6 6.Qh3 (better 6.Qe2 Nf6 7.a3=+) 6...Bb5?? (better 6...Nf6 7.Be2 Bb4=+) 7.Bh8+- h5 (7...Nf6 8.Nc3 a6 9.Bf6 Qf6 10.Qh7+-) 8.a4 (better 8.Nc3!? Bd7 9.Qg3 g5+-) 8...Bd7 9.Nf3 Bb4 (9...Nh6 10.b5+-) 10.Qg3 Ne7 11.0-0 Kf7 (11...Nbc6 12.Qg5 Bc8 13.Nc3+-) 12.Qe5 (better 12.Ne5 Kg8 13.Bf6+-) 12...Bd6?? (better 12...Qf8 13.Qc7 Qh8+-) 13.Ng5 Ke8 14.Qf6 Bc6 (14...Bc8 15.Nc3 c6 16.Bg7+- (16.Ne6?! Be6 17.Qe6 Na6+-)) 15.Qf7 (worse 15.Ne6 Qc8 16.Nc3 Na6+-) 15...Kd7 16.Qe6 Ke8 17.Bf6 Qd7 (17...Na6 18.Be7 Qe7 19.Qg6 Kd8 20.Nf7 Kc8 21.Qf5 Kb8 22.Nd6 Qd6 23.Nc3+-) 18.Qf7 Kd8 19.Be7 (19.Nc3 Kc8 20.Nb5 Bb5 21.ab5 b6+-) 19...Qe7 20.Qg6 Qe5 (20...Be8 21.Qf5 Qd7+-) 21.Nf7 (21.Nf7 Ke7 22.Ne5 Be5 23.d4+-) 1–0. DEFFM – acamuffo, freechess.org, 2019.

4.Nc3 Bb4 5.Nd5 Bf8 6.Qh5 Kd7 7.Qf7 Ne7 8.Nf4+-.

4.Nc3 Nf6 5.a3 Be7 6.f4 0-0 7.Nf3 Ne4 8.Be2 a6 9.Ne4 fe4 10.Ne5 c5 11.bc5 Bc5 12.0-0 Nc6 13.Qe1 Be7 14.Nc6 bc6 15.Rb1 c5 16.Be5 (16.d3 ed3 17.cd3 Bd7+=) 16...Bd6 (16...Qa5 17.Rb3=) 17.Ba1 (17.Qg3 Be5 18.fe5 Rf1 19.Rf1 Rb8+=) 17...c4= 18.d3 Bc5 19.Qg3 Qd7 (19...Ra7!?=) 20.dc4+/- d4 (20...Ba3!? 21.cd5 ed5+/-) 21.Rfd1 e5? (better 21...Qc7+/-) 22.fe5+- Qe6 (22...d3 23.cd3 ed3+-) 23.ed4 Ba3 (23...Ba7+-) 24.Qa3 Bd7 (24...Qg6 25.c5+-) 25.d5 Qg6 26.e6 Bc8 (26...Be6 27.de6 Qe6 28.c5+-) 27.Rb3 Be6 (27...Rf5 28.Qd6 Qe8 29.Qc7+-) 28.Rg3 Bf5 29.Rg6 Bg6 30.c5 e3 31.d6 Be4 32.Bc4 Kh8 33.Qc3 Bc6 (33...Ra7 34.d7 Rd7 35.Rd7 Rf1 36.Bf1 Bg2 37.Qg7) 34.Qg7 1-0. pcmvr - jjrizzo (2510), net-chess.com, 2021.

4.c4 Bb4?? 5.Bg7 Bd2 6.Nd2 +-.

4.Be2 Bb4?? 5.Bg7 Nf6 6.Bh8 +-.

4.Nf3= Bb4?? 5.Bg7 Qd7 6.Bh8 Qf7 (6...Qe7 7.Ne5 Nf6 8.a4+-) 7.Ne5 Qh5 (7...Qf8 8.Qh5 Kd8 9.Qh7 Nf6+-) 8.Qh5 Kf8 9.Qf7 1–0. GuestZNHG – GuestLCTX, freechess.org, 2019.

4.Nf3 Nc6 5.b5 Nb8 6.c4 b6 (6...Nf6 7.d4+=) 7.a4 Bb7 (7...Nf6 8.cd5 ed5 9.Qc2+=) 8.d4 (8.Nd4 Qd7+=) 8...Nf6 9.Nbd2 (9.Be2 a6+=) 9...Bb4 10.Qb3 Bd2 11.Nd2 0-0 12.Be2 (12.Ba3 Re8+=) 12...dc4 13.Bc4 Bd5 (13...Bg2 14.Be6 Kh8 15.Rg1=) 14.0-0 Ne4 15.Ne4 fe4 16.g3 (16.Rfc1!?+/-) 16...Qd7 17.Rac1 c6 18.Bd5 (18.Ba3 Rf6=) 18...Qd5 (better 18...ed5!? 19.f3 ef3=) 19.Qd5 cd5 (19...ed5 20.Ba3 Rf6 21.Be7+=) 20.Rc7 a6 (20...Rf7 21.Rfc1 Nd7 22.Ba3+=) 21.Rfc1 (21.Rb7 ab5 22.ab5+=) 21...h6 (better 21...ab5!? 22.Rb7 Rd8+=) 22.Re7 ab5?? (22...Kh7 23.Rcc7 Rg8 24.Re6 ab5 25.ab5+-) 23.ab5 (better 23.Rcc7 Kh8 24.Rg7+-) 23...Ra5 (23...Kh7!? 24.Rcc7 Rg8 25.Re6 Ra2+-) 24.Rcc7+- Rb5?? (better 24...Rd8+-) 25.Rg7 Kh8 26.Rh7 Kg8 27.Rcg7 1-0. upep (1625) - cae123, Rated Classical game, lichess.org, 2013.

4.Nf3 Bd6?? 5.Be2 (better is 5.Bg7 Bb4 6.Bh8+-) 5...Nf6= 6.a3 0-0 7.0-0 c6 8.c4 Nbd7 (8...dc4 9.Bc4 b5 10.Bb3=) 9.c5+= Bc7 10.Nc3 (10.Nd4 Nb8+=) 10...Ne4 11.d3 Ng5 12.Ng5 Qg5 13.g3 Nf6 14.Bf3 e5 15.Bg2 e4 16.de4 (16.b5 Qh6=) 16...fe4-/+ 17.Ne2 Bg4 18.Qd2 Qh5 19.Nf4 Bf4 20.ef4 Bf3 21.Bf6 Rf6 (21...gf6?! 22.Bf3 Qf3 23.Rfe1=) 22.Qe3 Rh6 23.h4 Qg4 24.Bf3 ef3 (24...Qf3?! 25.Qf3 ef3 26.Rfe1=) 25.Kh2?? (better is 25.Rfe1-/+) 25...Rh4! 26.gh4 (26.gh4 Qg2 Mate attack) 26…Qg2 0–1. Fournier,Frederic (1645) – octaviochiapas (1625), Active, 2006.

4.Nf3 Bd7 5.Ne5 Nf6 (5...Bb4?? 6.Qh5 g6 7.Ng6+-) 6.b5 c6 7.a4 Bd6 (7...a6 8.Be2 Bd6 9.Bh5 g6 10.Be2=) 8.Be2 0-0 9.0-0 c5 10.f4 a6 11.c4 ab5 12.ab5 Ra1 13.Ba1 Qa5 14.Bc3 Qc7 15.Qb3 b6 16.Bf3 Ne4 17.Bb2 Nf6 (17...dc4!? 18.Nc4 Nf6+-) 18.cd5+- (18.Nd7?! Nbd7 19.Qd3 d4+=) 18...ed5 (better 18...Bc8+-) 19.Bd5 Nd5 (19...Kh8 20.Nf7 Rf7 21.Bf7 Bb5 22.Qb5 Qf7 23.Qb6 Ne8+-) 20.Qd5 Kh8 (20...Be6 21.Qe6 Kh8+-) 21.Nf7 Rf7 (21...Kg8 22.Nh6 Kh8 23.Qg8 Rg8 24.Nf7) 22.Qf7 Bb5 23.Bg7 1–0. DEFFM – CuteGirlGuest, freechess.org, 2018.

4.Nf3 Qe7 5.a3+= Nf6 6.Ne5 Ne4?? (6...Nbd7 7.Be2+=) 7.Nc3?? (7.Qh5!? g6 8.Ng6 Qf7 9.Bh8 hg6+-) 7...Nd7? (better 7...Nf6+=) 8.Qh5+- Kd8 (8...g6 9.Ng6! Qf7 10.Ne4 fe4 11.Bh8 hg6+-) 9.Nf7 Ke8 10.Nh8 g6 11.Qe2 (better 11.Ng6!? hg6 12.Qg6 Kd8 13.Ne4 fe4+-) 11...Qg7 (11...Bg7 12.Rd1+-) 12.Ng6! Qg6 (12...Qg6 13.Ne4 Combination; 12...hg6 13.Rb1 Combination) 13.Ne4 de4 14.g3 a6 15.Bg2 Nb6 (15...e5 16.d3 ed3 17.cd3+-) 16.Be5 (16.f3 Bd6+-) 16...Kd8 (16...Bd6 17.Bd6 cd6 18.f3+-) 17.0-0 (17.d3 Bd6 18.Bd4 Nd7+-) 17...Bd7 18.c4 Bg7 (18...Bc6 19.d4+-) 19.Bg7 Qg7 20.Rfd1 (20.d3 ed3 21.Qd3 Kc8+-) 20...h5 (20...Ba4 21.d3 Bd1 22.Rd1+- (22.Qd1?! Kc8+-)) 21.Qh5 (21.d3 ed3 22.Qh5 c6+-) 21...Be8 (21...Nc4 22.d3 Nb2 23.de4 Nd1 24.Rd1 fe4 25.Bh3+-) 22.Qh4 Kc8 23.c5 (23.d3 Ba4 24.de4 Bd1 25.Rd1 Kb8+-) 23...Nc4 (23...Nd5 24.d3 ed3 25.Qd4 Qd4 26.ed4+-) 24.d3 Nd2 (24...Nb2 25.de4 Nd1 26.Rd1 Bd7+-) 25.de4 Bc6 (25...Bd7 26.Ra2 Ne4 27.Be4+-) 26.Ra2 Ne4 (26...Nf3 27.Bf3 Kb8 28.Rd8 Ka7+-) 27.Qd8 1-0. Fuirio - Quique75, Rated Classical game, lichess.org, 2013.

4.Nf3 Be7?? 5.a3?? (better is 5.Bg7 Bf6 6.Bh8 Bh8 7.d4+-) 5...Bf6 6.Bf6 Nf6 7.Nc3 0-0 8.Be2 a6 9.0-0 c6 10.d4 b5 11.Ne5 Qd6 12.Bd3 Nbd7 13.Nd7 Bd7 14.Ne2 e5 15.de5 Qe5 16.Nd4 f4 17.Qf3 Ne4 18.Be4 de4 (18...Qe4?! 19.Qe4 de4 20.Rfe1=) 19.Qe2 f3! 20.gf3 (20.Qd2 fg2 21.Kg2 Bg4-+) 20...ef3 21.Nf3 Bg4?? (better is 21...Qf6 22.Nd4 Bh3-/+) 22.Kg2?? (better is 22.Ne5 Be2 23.Rfe1+/–) 22...Qe4-+ 23.h3 Bf3 (23...Bf3 24.Qf3 Rf3 25.Rad1 Raf8 26.Kg1 Rh3 27.f3 Rg3 28.Kf2 Rff3 29.Ke2 Qe3) 0–1. Fournier,Frederic (1925) – BELG (1715), Active (5/0), 2005.

4.Nf3 h6 5.Ne5+/- Nf6 6.b5 (6.Be2!? h5 7.Ng6+/-) 6...Bd6+= 7.Be2 0-0 8.c4 c6 9.cd5 cd5 (9...Nd5 10.a4=) 10.a4 Qc7 11.Nf3 (11.f4 Nbd7 12.Nd7 Bd7=) 11...b6 (11...e5 12.Nc3=) 12.0-0 Nbd7 13.Nc3 Nc5 14.d4 Nce4 15.Rc1 Qf7 (15...Qb8 16.Ne4 fe4 17.Ne5=) 16.Ne4 fe4 17.Ne5 Bb7?? (better 17...Qb7+=) 18.Nf7+- Rf7 19.f3 ef3 20.Bf3 Raf8 (20...a6 21.Qb3+-) 21.Qe2 1-0. iamdudum (1805) - oto (1800), Rated Classical game, lichess.org, 2013.

4.g4 Ne7 5.gf5 Nf5 6.Bd3 Qg5 (6...Nd7 7.a3=) 7.Nh3 (7.Nf3 Qh5=) 7...Qh4 (7...Qg2!? 8.Qh5 g6=+) 8.Nf4= Bb4 9.Bg7?? (9.Bf5 ef5 10.Nd5 Qe4 11.Qh5 Kd7 12.Qf7 Be7 13.Ne7 Qh1 14.Ke2 Kd8+- (14...Qh2 15.Nf5 Kc6 16.Nd4 Kd6 17.Nc3 Bg4 18.Kd3 Be2 19.Ke2 Qh5 20.Qh5 c6 21.Ne4 Kc7 22.Ne6 Kc8 23.Qf7 Nd7 24.Nd6 Kb8 25.Qd7 h5 26.Qb7)) 9...Rg8 (better 9...Ng7 10.Rg1 Qf6-+) 10.Be5 (better 10.Bf5 ef5 11.Bd4=) 10...Ng3?? (better 10...Ne3 11.Qh5 Qh5 12.Nh5 Nd7 13.Bh7 Rg5 14.Bc7 Ng2 15.Kf1 Nh4=) 11.fg3+- Rg3 12.hg3 Qh1 13.Ke2 (better 13.Bf1 Nc6 14.Bf6+- (14.Bc7?! Kd7+/-)) 13...Qh2+= 14.Kf3 Nd7 15.Bc7 Nf6? (better 15...e5 16.Qe2 Qh1 17.Kf2 ef4 18.ef4 Kf7+=) 16.c3?? (16.Qf1 e5 17.Bb5 Ke7=) 16...Be7?? (better 16...e5 17.Qa4 Kf7-+) 17.Qa4 (17.Bb5 Kf8 18.Qf1 e5+-) 17...Bd7 (17...Kf7!? 18.Be5 Nd7+/-) 18.Bb5+- Qh1 (better 18...Rc8 19.Be5 a6 20.Bd7 Nd7=) 19.Ng2?? (19.Ke2 Rc8 20.Bd7 Nd7 21.Be5+- (21.Ne6?! Qg2 22.Kd3 Qf1 23.Kc2 Qf5 24.d3 Qe6+=)) 19...Qh5 (19...Rc8 20.Bd7 Nd7-+) 20.Kf2+/- Ne4? (better 20...Ng4 21.Ke2 Ne5 22.g4 Qg4 23.Kf1 Qf3 24.Kg1 Nc6+/-) 21.Kg1+- Ng3 (21...Bb5 22.Qb5 Kf7 23.Qf1 Ke8+-) 22.Bg3 (22.Bg3 Rd8 23.Bd7 Rd7 24.Qa7+-) 1-0. Fuirio - Quique75, Rated Classical game, lichess.org, 2013.

4.h3 Bb4?? 5.Bg7 Nf6 6.Bh8 +-.

4.h3 Nf6 5.g4 Qe7 6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Nbd7 10.Nf3 (10.Bg2 Qf7=) 10...Rg8 (10...fg4!? 11.hg4 Ng4+=) 11.Ne5= Ne5 12.Be5 g6 13.Nc3 Ne4 14.Ne4 fe4 15.Be2 Bg7 16.Bg3 Rf8 17.0-0 Bf6 18.d3 ed3 19.Qd3 c6 20.e4 Qc5 21.ed5 ed5 22.bc6 bc6 23.Qb3 Kf7 24.Bd3 Re8 25.Qa4 Bd4 26.Rd1 Bg7 27.Qf4 Kg8 28.Qc7 Bd4 (28...Bb2 29.Bd6 Qc3 30.f4=) 29.Kg2 (29.Rb1 Qc3+=) 29...Rf8 30.Rb1 Qc3?? (30...Be6 31.Rb7 Rf7 32.Rb8 Kg7 33.Be5 Kh6 34.g5 Kh5 35.Bd4 Qd4 36.Qg3+-) 31.Bf4 (better is 31.Rb8 Bg7 32.Rc8+-) 31...Bg7?? (better is 31...Be6=) 32.Bd6+- Be6 33.Bf8 Bf8 34.Rb7 Bg7 (34...Qg7 35.Qc6 Bf7+-) 35.Rb8 (better is 35.Qe7 Qe5 36.f4+-) 35...Bf8 36.Qe7 (36.Qe7 Bc8 37.Rc8+-) 1–0. Kostrun,Slaven (2305) – Orak,Tugomir (2095), CRO–chT2b Croatia, 2009.

5.a4 Bd6 6.c4 0-0 7.Nf3 c6 8.d4 Qe7 9.c5 Bc7 10.Bd3 Nbd7 11.0-0 e5 12.Ne5 Ne5 13.de5 Be5 14.Be5 Qe5 15.Nd2 Ng4 16.Nf3 Qf6 17.h3 Nh6 18.Qb3 g5 19.Nd4 g4 20.hg4 fg4 21.g3 Nf7 22.Qd1 Ng5 23.Be2 h5 24.Kg2 Nh3 25.Qd2 Bf5 26.Bd3 Be4 27.Be4 de4 28.Qe2 Rf7 29.Ra2 Raf8 30.Qc4 Kh8 31.Qe6 Qg5 32.Qe4 Qc5 33.Rc2 Qg5 34.bc6 bc6 35.Rc6 Rf2 36.Rf2 Rf2 37.Kh1 Rf1 38.Kg2 Rg1 39.Kh2 Rf1 40.Rc8 Kg7 41.Rc7 Rf7 42.Rf7 Kf7 0-1. mikromurks (2360) - majestik (2210), Rated Bullet game, lichess.org.

5.a4 Bd6 6.c4 0-0 7.Nf3 Ne4 8.Be2 c6 9.d3 Nf6 10.0-0 Nbd7 11.d4 Ne4 12.Ne5 (12.Qb3 Ndf6+=) 12...Ne5 13.de5 Bc5 14.Nd2 Qc7 15.cd5 ed5 16.Rc1 Bb4? (better 16...Bb6!?+=) 17.Ne4+- fe4 18.Qd5! Kh8? (18...cd5 19.Rc7 Pinning (19.Rc7 Deflection)) 19.bc6 b6 (19...bc6 20.Qe4 Qe7+-) 20.Qe4 Bf5 (20...Qe7 21.e6! Be6+-) 21.Qb4 1-0. BeepBeepImAJeep (2525) - dk1210 (2035), lichess.org, 2019.

5.c4 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3).

5.Be2 Bd6 6.c4 c6 7.cd5 cd5 8.f4 0-0 9.Nf3 Qb6 10.0-0 Nbd7 11.d4 (11.Bd4 Qa5+=) 11...Ne4 12.Nc3 Qd8 13.Ne4 fe4 14.Ng5 (14.Ne5 Qa5+=) 14...Nf6 15.Bg4 (15.Qa4 Qe7=) 15...Qe7 16.Be2 h6 17.Nh3 Bd7 18.a4 Rac8 19.g4 Nh7 20.f5? (better 20.Nf2!?=+) 20...Qh4 21.Nf4 Bf4 22.Rf4 Ng5 0–1. GuestBFQC – GuestSCVM, freechess.org, 2017.

5.Nf3 Bd6 (---> 4.Nf3 Nf6 5.b5 Bd6).

5.a4 Nf6 6.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3 c6 6.a4).

5.b5 Nf6 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 b6 5.e3 Bb7).

5.Nf3 Nf6 6.a3 Bd6 7.d4 0-0 8.c5 Bc7 9.Be2 Bd7 10.0-0 Ne4 11.Nbd2 Be8 12.a4 Nd7 13.Nb3 Qf6 14.b5 Qh6 15.Ne5 Be5 16.de5 Ndc5 (worse is 16...Nec5 17.bc6 Nb3 18.cd7 (18.Qb3?! bc6 19.Ba3 Rf7=) 18...Na1 19.de8N Rfe8 20.Qa1+/–) 17.Nc5 Nc5 18.Ba3 b6 19.Qc2 (19.Rc1 cb5 20.ab5 f4 21.ef4 Rc8=) 19...cb5+= 20.Bc5 bc5 21.ab5 c4 22.b6 a5 23.Qc3 a4 24.Qb4 f4 25.Qd6 Bf7 (25...fe3? 26.b7 ef2 27.Kh1+-) 26.b7 Rab8 27.Rfb1 fe3 28.Ra4?? (better is 28.f3-+) 28...ef2 29.Kf1 (29.Kh1 Rb7! 30.Rf1-+) 29...Qh2 30.Qb8 Qg1 0–1. Kuperman,Carlos – Schiller,Eric, Pan American, 1988.

5.Nf3 Nf6 6.a3 Be7 7.Nc3 0-0 8.d4 Ne4 9.Nd2 Nd2 (9...a5 10.b5=) 10.Qd2 Nd7 11.cd5 cd5 12.Na4 Nf6 13.Nc5 Ne4 14.Ne4 fe4 15.Be2 Bd7 16.0-0 Bh4 (16...Bd6 17.f3=) 17.g3 (17.f3 ef3 18.Rf3 Rf3 19.Bf3 Qg5=) 17...Bg5 18.Rfc1 Be7 19.Bf1 (19.Rf1 a5=) 19...Rc8 20.Rc8 Qc8 21.Rc1 Qb8 22.Rc3 (22.Be2 Qe8=) 22...Rc8 (22...Bd6 23.Rc2=+) 23.Qc1 (23.Bg2 Bc6=) 23...Rc3=+ 24.Qc3 Qc8 (24...Bd6!?=) 25.Qc8+= Bc8 26.b5 (26.Kg2 Bd7+=) 26...g5 27.h3 Bd7 28.Kg2 Kg7 (28...Be8 29.Be2=) 29.Be2 (29.f3 ef3 30.Kf3 Bd6=) 29...h6 (29...Be8 30.a4=) 30.g4 (30.f3 ef3 31.Kf3 Bd6=) 30...Bd6 (30...Be8 31.Kf1=) 31.f3 ef3 32.Kf3 b6 (32...Be8 33.e4=) 33.Bd3 Kf6 34.e4 e5? (better 34...de4 35.Ke4 Bc8+=) 35.ed5+- ed4 36.Bd4 Be5 37.Bf2 1-0. Nf3 (1810) - varewq (1615), Rated Classical game, lichess.org, 2013.

5.Nf3 Nf6 6.a3 h6 7.Ne5 Bd6 8.Ng6 Rg8 9.h4 Nbd7 10.d4 (10.c5 Bc7+=) 10...Nf8 (10...Kf7 11.h5+=) 11.Ne5+= g5 (11...N8d7!?+=) 12.hg5+- hg5 13.Nd2 N8d7 14.Qc2 White prepares the advance c5 14...Qc7 (14...Qe7 15.Be2+-) 15.Rh6 Ke7 (15...Be7 16.Be2+-) 16.c5+- Be5 17.de5 Ng4 18.Rh7 Kf8 19.Be2 Nge5 20.Bh5 Qd8 (better 20...Rg7 21.Rh8 Rg8+-) 21.0-0-0 Nf6 (21...Ng6 22.Rh6 Nf6 23.Bg6+- (23.Rg6?! Nh5 24.Rh6 Ng7+-)) 22.Be5 Nh7 23.Qc3 Nf6 (23...d4 24.Ne4! fe4 (24...dc3 25.Rd8 Ke7 26.Rg8 fe4 27.Rg7 Kf8 28.Rh7 a5 29.Bf6 ab4 30.Rh8) 25.Rd4 Bd7+-) 24.Bf6 Qd7 25.Nf3 Qh7 (25...g4 26.Be5 Rg7 27.Bd6 Kg8 28.Qf6 b6 29.Qf8 Kh7 30.Rh1 Rg6 31.Bg6 Kg6 32.Rh6) 26.Qe5 Qh5 27.Qd6 Kf7 28.Qe7 Kg6 29.Ng5 Qg5 (29...f4 30.Qf7 Kf5 31.Qh5 Kf6 32.Qf7 Kg5 33.ef4 Kg4 34.Rd3 Rh8 35.Rg3 Kh4 36.Rh3 Kg4 37.f3) 30.Bg5 Rg7 31.Qf6 Kh7 1–0. zuri9 (2295) – chessus11 (1750), gameknot.com, 2017.

5.Nf3 Nf6 6.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3 c6 6.Nf3).

5.Qh5 g6 6.Qd1 (6.Qf3 Nf6 7.a3 Bd6=) 6...Nf6 7.cd5 (7.Qb3 a5=) 7...ed5 8.b5 Bd6 (8...Bg7 9.bc6 Nc6 10.Nf3=) 9.bc6 (9.Nf3 0-0=) 9...bc6 (9...Nc6 10.Nf3=) 10.h4 (10.Nf3 Nbd7=) 10...0-0+= 11.Be2 Qc7 (11...Na6 12.h5 Rb8 13.Ba3=) 12.Nf3 (12.h5 g5=) 12...Ba6 (12...Qe7 13.Nc3=) 13.Ng5 (13.Bf6!? Be2 14.Qe2 Rf6 15.h5=) 13...Be2+= 14.Qe2 White launches an attack 14...h6 (14...Qe7 15.Nc3+=) 15.Ne6 Qb7 16.Bc3 (16.d4 Re8 17.Nc5 Bc5 18.dc5 Ne4+=) 16...Re8+= 17.Nd4 Ne4 (17...Nbd7!?+=) 18.h5= g5 (better is 18...c5!? 19.Nb5 A) worse is 19...Nc3 20.N1c3 (20.Nd6?! Qb2 21.dc3 Qa1=) 20...Be5 21.hg6+/–; B) 19...g5=) 19.Nf5+/– Nc3 (19...Bf8 20.0-0+/–) 20.Nc3 (worse is 20.Nd6 Qb2 21.dc3 Qa1 22.Ne8 Qb1 23.Qd1 Qd1 24.Kd1 Nd7+/–) 20...Re6 (20...Bf8 21.d4+/–) 21.Rb1 (21.Nd6 Rd6 22.d4 Nd7+/–) 21...Qf7 (21...Qc7 22.d4+/–) 22.Nd6 (22.Qg4 Nd7+/–) 22...Rd6+/– 23.Qg4 (23.0-0 Nd7+/–) 23...Nd7 24.Rb7 Ne5 (24...c5 25.Nb5 Re6 26.Na7+- (26.Ra7?! Ra7 27.Na7 Ne5=)) 25.Rf7+- Ng4 26.Rc7 Ne5 27.Ke2 (27.d4 Rd7 28.Rd7 Nd7+/–) 27...Rd7 (27...d4 28.Ne4 d3 29.Ke1+/–) 28.Rd7 Nd7 29.f3 (29.Rb1 Nf6+/–) 29...Re8 (29...Rb8 30.Rb1+/–) 30.Rb1 d4 (30...Nf6!?+/–) 31.Ne4+- de3 (31...Rb8 32.Rb8 Nb8 33.Nc5 de3 34.de3+-) 32.de3 (better is 32.Rb7!? Rd8+-) 32...Rb8 33.Rb8 Nb8 34.Nc5 Kf7 35.Kd3 (35.f4 Kf6+-) 35...Ke7 (35...Kf6 36.Kd4+-) 36.e4 Nd7?! (36...a6+-) 37.Nd7 Kd7 38.Kd4 Kd6 39.g3 c5 40.Kc4 a6 41.a3 Kc6 42.f4 g4 43.e5 a5 (43...Kb6 44.Kd5 c4 45.Kc4 Kc6+-) 44.a4 Kd7 45.f5 Ke7 46.Kc5 Kf7 47.Kd6 (47.Kb5 Ke8 48.Ka5 Kd8+-) 47...Ke8 48.Ke6 Kf8 49.Kf6 (49.Kf6 Ke8 50.Kg6+-) 1–0. Labitte,Alain – Levers,Christelle, Bethune–D, 2001.

6.a3 Nf6 7.Nf3 Bd6 8.Be2 0-0 9.0-0 Ne4 10.d3 Ng5 11.Ng5 Qg5 12.f4 Qh6 13.Rf3 Qe6 14.Rg3 Be7?? (better 14...Rf7=) 15.Rg7+- (15.Bg7?! Bh4 16.Bf8 Bg3+-) 15...Kh8 16.Re7 Kg8 17.Re6 (better 17.Rg7 Kh8 18.Rg6 Qf6 19.Bf6 Rf6 20.Rf6 Kg7+-) 17...Rf6 (17...Be6 18.Qe1 Kf7+-) 18.Rf6 (18.Rf6 Kg7 19.Bh5 d4 20.Rf7 Kg8 21.Qf3 c5 22.Qg3 Kh8 23.Qg7) 1–0. GuestQFBN – GuestWGCK, freechess.org, 2017.

6.Be2 Nf6 7.a3 Be7 8.Bh5 g6 9.Be2 0-0 10.d3 (10.Nf3 b5=) 10...Ne8 (10...a5 11.ba5 Qa5 12.Bc3=) 11.Qc2 (11.Nf3 a5=) 11...Bf6 (11...f4 12.ef4 a5 13.ba5 Rf4 14.Bc3=) 12.Nf3 Nd7 (12...f4 13.ef4 Bb2 14.Qb2 Rf4 15.0-0=) 13.d4 (13.0-0 Nd6+=) 13...Qe7 14.0-0 g5 (14...Nd6 15.Bd3=) 15.Qf5 (15.Re1 Nd6+=) 15…Bd4= (15...Bd4 16.Qc2 Bb2 17.Qb2 g4=). GuestMZCR – GuestMQTM, freechess.org, 2017.

6.Be2 Nf6 7.Nf3 Bd6 8.a3 0-0 9.Nd4 Ne4 (better 9...f4=) 10.f3?? (10.0-0 f4=) 10...Ng5 (10...Qh4 11.g3 Bg3 12.Kf1 Qh3 13.Kg1 Bf2) 11.0-0 (11.f4 Ne6=) 11...Ne6 (11...f4 12.Re1=+) 12.f4= Nd4 13.Bd4 Be7 14.Bb2 (14.Qc2 Be6=) 14...Bf6 15.Qc2 Nd7 16.d4 (16.Rc1 Nb6=) 16...Qe8 17.Rf3 Nb6 18.Rh3 g5 (18...Rf7!?=) 19.fg5+= Bg5 Exerts pressure on the backward pawn 20.Bh5 (20.Bc1 Qe7 21.Rg3 Kh8+=) 20...Qd7 (better 20...Be3!? 21.Kh1 Qe4 22.Rg3 Kh8-/+) 21.Rg3+= h6 22.Nd2 Kh8 23.Rf1 (23.Rf3 Qe7 24.Qd3 f4+=) 23...Qe6 (23...Qe7 24.Qb3=) 24.Rff3 (24.e4!?+=) 24...Bd7 25.Nf1 (25.Nb3 f4 26.ef4 Bf4=+) 25...Nc4=+ The pressure on the backward pawn e3 grows 26.Bc1 Rae8?? (better 26...Be8 27.Rh3 Bh5 28.Rh5 Rae8=+) 27.Be8+- Be8 28.Rh3 Bg6 29.Qf2 Kg7 30.Ng3 Nb6 31.Nh5 (31.Ne2 Nc4+-) 31...Bh5+- 32.Rh5 Nc4 33.Rhh3 Nb6 (better 33...Qe4+-) 34.Rh5 Na4?? (34...Nc4 35.Qg3 Nd6+-) 35.h4 Bd8? (35...Qg6 36.g4 (36.hg5?! Qh5 37.gh6 Kh7+-) 36...Be7 37.e4 fe4 38.Bh6 Qh6 39.Rf8 (39.Rh6?! Rf3 40.Qd2 Rd3+-) 39...Qc1 40.Kg2 Bf8 41.Rg5 Qg5 42.hg5+-) 36.Rhf5 (36.e4 de4 37.Qg3 Kh7 38.Bh6 Qh6 39.Rh6 Kh6 40.Qd6 Kg7 41.Rg3 Kf7 42.Rg6+-) 36...Rf5 37.Rf5 Bc7? (37...Bh4!? 38.Qc2 Nb6+-) 38.Qf3 (better 38.e4 de4 39.Bh6 Qh6 40.Rf7 Kh8 41.Rf8 Kh7 42.Qf5 Qg6 43.Qd7 Qg7 44.Rf7 Qf7 45.Qf7 Kh6 46.Qc7+-) 38...Nc3 39.Qg4 (39.e4 Ne4 40.Qh5+-) 39...Kh7? (better 39...Qg6 40.Qg6 Kg6+-) 40.Qf3 Ne4?? (better 40...Kg7=) 41.Rf7+- Kg6 (41...Kg8 42.Rc7 Nf6 43.Rb7+-) 42.Rc7 (42.h5 Kg5 43.Rg7 Kh4 44.Bd2 Bh2 45.Kh1 Bd6 46.Be1 Bg3 47.Bg3 Ng3 48.Qg3 Kh5 49.Qh2 Qh3 50.Qh3) 42...Nf6 43.Qg3 Kh5 44.Qf4 (44.Rg7 Qf5 45.e4 Ne4 46.Qe3 Qf2 47.Qf2 Nf2 48.Kf2 Kh4 49.Kf3 Kh5 50.g4 Kh4 51.Rh7 c5 52.Rh6) 44...Ng4 (44...Kg6 45.Rb7 a6+-) 45.Rf7 (better 45.Rg7 Qg6 46.Rg6 Kg6 47.Qg4 Kf6 48.Qd7+-) 45...Qe4 46.Qe4 (46.Rf5 Qf5 47.Qf5 Kh4 48.Bd2 Nf2 49.Kf2 c5 50.g3) 46...de4+- 47.Bd2 (47.Rb7 Kh4 48.Ra7 Nf6+-) 47...a6 (47...b5 48.Ra7 Kh4 49.Rc7+-) 48.Rb7 1–0. GuestCLQG – GuestNSGC, freechess.org, 2017.

6.Nf3 Nf6 7.b5 Bd6 8.Be2 0-0 9.a4 Ne4 10.0-0 Nd7 (10...f4 11.d3 Nf6 12.ef4 Bf4 13.Re1=) 11.bc6 bc6 12.Qc2 Qb6 13.d3 Nef6 14.a5 Qc5? (14...Qc7 15.Nbd2=) 15.Qa4 (better 15.Nc3 Qb4 16.Nd4+-) 15...Ba6?? (better 15...Qb5 16.Qb5 cb5+=) 16.Ba3+- Bb5 (16...Bh2 17.Kh2 Qb5 18.Bf8 Rf8 19.Qb5 cb5 20.Rc1+-) 17.Bc5 Ba4 18.Bd6 (18.Bd6 Bb5 19.Bf8 Kf8 20.Na3+-; 18.Ra4?! Nc5 19.Ra2 Ne6=) 1–0. Abdullaevich (1895) – ANNET1991 (1875), lichess.org, 2020.

6.Nf3 Nf6 7.Ne5 Bd6 (7...Bb4 8.Be2-/+) 8.f4 (8.b5 0-0=+) 8...0-0 (8...Bb4 9.Bd3-/+) 9.Be2 (9.a3 Ne4 10.Qf3 Nd7=+) 9...Bb4-/+ 10.0-0 Nbd7 11.Nf3 Nc5 (11...Qe7 12.Qc2-/+) 12.d3 (12.Ne5 Be6-/+) 12...Bd7 (12...Ng4 13.Qc1-/+) 13.a3 Ba5 14.Ne5 Be8 (14...Ne6 15.Qc2-/+) 15.g4 (15.Qc2!? Bb6 16.Bc3-/+) 15...fg4-+ 16.Bg4 Bb6 17.d4 (17.Bh3 Nfd7-+) 17...Nce4 (17...Ng4 18.Qg4 Bd7 19.Nd7 Nd7 20.Qe6 Kh8 21.Qh3-+) 18.Be6 Kh8 19.Nd2 (19.Nc3 Qe7 20.Bf5 Bh5-+) 19...Nd6 (19...Bh5 20.Qc2-+) 20.f5 (20.Qc2 Qe7 21.f5 Bh5-+) 20...Bf7 (20...Bh5 21.Qb3-+) 21.Bf7 (21.Qf3 Be6 22.fe6 Qe7-+) 21...Nf7-+ (21...Rf7?! 22.Nf7 Nf7 23.Qb3=+) 22.Ng4 (22.Rb1 Ne8-+) 22...Nd6 23.Ne5 (23.Bc3 Nfe8-+) 23...Nfe4 (better 23...Nd7!? 24.f6 Nf6 25.Qc2-+) 24.Ne4 Ne4 (worse 24...de4 25.Qh5 Qe8 26.Qg5-/+) 25.Qg4 (25.Qh5 Kg8-+) 25...Qg5 (25...Qe7!?-+) 26.Qg5-/+ Ng5 27.Rae1 (27.a4 Ne4-/+) 27...Ne4-+ 28.Rf4 Ba5 (28...Bc7 29.Rb1-+) 29.Ref1 Bd2 (29...Rae8 30.Rg4-+) 30.Bc1 (30.Re4 de4 31.Nc4 Be3 32.Ne3 Kg8=+) 30...Rad8 (30...Bc3 31.a4-+) 31.Rh4 (31.Bd2 Nd2 32.Rd1 Ne4-/+) 31...Rf6 32.Bd2 Nd2 33.Rf2 Nc4 (33...Ne4 34.Rff4-/+) 34.Ng4 Rf7 35.a4? (better 35.Ne5!? Rc7 36.Nc4 dc4 37.Re4-/+) 35...Re8-+ 36.Rf3 Re4 37.f6 (37.h3 Nd6 38.f6 gf6-+) 37…g5 (37...g5 38.Nh6 Rf6 (38...Rh4?! 39.Nf7 Kg8 40.Nd8=; 38...gh4?! 39.Nf7 Kg8 40.Nd8-/+) 39.Re4 Rf3-+ (39...Rh6? 40.Re7 Kg8 41.Rb7+-)) 0–1. GuestTKGK – GuestBCSW, freechess.org, 2017.

5.a3 =.

5.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3).

5.c5 Be7 6.f4 =.

5.Nf3 Bb4!? 6.Qa4 Nc6 =+.

7.Bd3 b6 8.Nf3 =.

7.Bd3 Nbd7 8.h3 Qc7 9.Ne2 Ne4 10.Nf4 Ndf6 11.a4 0-0 12.Nd2 b6 13.0-0!? =.

7.Bd3 Nbd7 8.h3 Qc7 9.Ne2 Ne4 10.Nf4 Ndf6 11.a4 0-0 12.Nd2 b6 13.g4 bc5 14.bc5 Rb8 15.Qc2 Qa5 16.Ke2?? (16.Rb1!?=+) 16...Nd2 (16...Qd2 17.Qd2 Nd2 18.Ra2-+) 17.Qd2?? (better is 17.Bc3 Qc7 18.Bd2-+) 17...Ne4 (better is 17...Qd2 18.Kd2 Rb2 19.Bc2 e5-+) 18.Qa5+- Rb2 19.Kd1 (better is 19.Kf1 Nf2 20.Qc3 (< 20.Qa7 Bg5 21.Rh2 Nd3 22.Rb2 Nb2+-) 20...Nd3 21.Nd3+- (< 21.Qd3 e5 22.de5 g5+-)) 19...Rd2 (19...Bd8 20.Qa7 Nf2 21.Kc1 Rb7+-) 20.Kc1 Bd8 (20...Rf2 21.gf5 Bd8 22.Qa7 ef5 23.Rg1+-) 21.Qb4 (better is 21.Qa7 Rf2 22.Nh5 Bf6+-) 21...Rf2 22.Be4 fe4 23.Rd1 (23.Qb8!? Ba5 24.Ra3 Bd2 25.Kb1 Be3 26.Re3 R2f4+-) 23...Bg5 (23...Bc7 24.Qe1 Rf3 25.Qh4+-) 24.Qc3 (24.Qa5 Rf3 25.Re1 Bh4+-) 24...Bf4 (24...Rf3 25.Ng2 e5 26.de5 Rh3+-) 25.ef4 R8f4 26.Qa5 Rf8 (26...Rf7 27.Rb1 Rd7 28.Rb8+-) 27.Qc7 (better is 27.Qa7 R2f7 28.Qb6 Bd7+-) 27...Ba6 (27...R2f7 28.Qc6 Bd7+-) 28.Qc6 Bd3 29.Qe6 Kh8 30.Rd2 (better is 30.Re1+-) 30...Rf1= 31.Kb2 Rb8 32.Kc3 (32…Ra1 33.Rc2 Ra4 34.Kd2 Bc2 35.Qd5-+) -+. reverendrev – fierce, Live Game Caissa's Web, 2004.

7.Bd3 Nbd7 8.h3 Qc7 9.Ne2 Ne4 10.Nf4 Ndf6 11.a4 0-0 12.Nd2 b6 13.g4 bc5 14.bc5 Rb8 15.Qc2 Nd2 16.Kd2 Ne4 (16...fg4?! 17.hg4 Ne4 18.Be4 de4 19.Qe4 Rf4 20.Qh7 Kf7 A) 21.ef4? Qf4 (21...Rb2 22.Kc1 Qf4 23.Kb2 Qd4 24.Kb1 Qb4 25.Kc2 Qc5 26.Kd2 Bg5 27.Ke2 Qe5 28.Kf1 Qa1 29.Kg2 Qa4 30.Qh5 Kf6 31.Rh3-+) 22.Kd1 Rb2 23.Qh5 g6 24.Qh7 Ke8 25.Qg6 Kd8-+; B) 21.Qh5 Kf8 B1) 22.ef4 Rb2 (22...Qf4?! 23.Kd1=) 23.Ke3 Rb3 24.Ke4 Bf6-/+; B2) 22.Qh8 Kf7 B21) 23.ef4 Qf4 (23...Rb2?! 24.Kc1 Rf2 25.Qh5 g6 26.Qe5 Qe5 27.fe5-/+) 24.Kc2 Qe4 25.Kd1 Qf3 26.Ke1 Rb2 27.Qh5 g6 28.Qh7 Ke8 29.Qg8 Kd7 30.Qd8 Kd8 31.Rh8 Kd7 32.Rd8 Kd8 33.d5 Qe2; B22) 23.Qh5 Kf8 B221) 24.ef4? Qf4 (24...Rb2 25.Kc1 Rf2 26.Qe5 Qe5 27.fe5-/+) 25.Ke1 Rb2 26.Qh8 Kf7 27.Qh5 g6-+; B222) 24.Qh8 Kf7 B2221) 25.ef4? Qf4 (25...Rb2?! 26.Kc1 Rf2 27.Qh5 g6 28.Qe5 Qe5 29.fe5-/+) 26.Ke1 Rb2-+; B2222) 25.Qh5=) 17.Kd1 e5 18.de5 Bc5-/+ (18...Nc5?! 19.Bf5 Bf5 20.gf5=; 18...fg4?! 19.hg4 Bg4 20.Kc1-/+) -/+.

7.Bd3 Nbd7 8.Nh3 Ng4 +=.

6.a3 Bd6 7.Nc3 0-0= 8.Qc2 Qe7 (8...a5 9.b5=) 9.Be2 (9.c5 Bc7=) 9...Bd7 (9...e5 10.0-0=) 10.h3 (10.c5 Bc7+=) 10...a5 (10...e5 11.c5 Bc7 12.0-0=) 11.b5 (11.c5 Bc7=) 11...Ne4 (11...cb5 12.cb5 Rc8 13.g4=) 12.g4 (12.bc6 Bc6 (worse is 12...Nc6 13.cd5 ed5 14.Nd5+/–; 12...bc6?! 13.d4=) 13.cd5 Nc3 14.dc6 Ne2 15.cb7 Qb7 16.Ke2 Nc6+=) 12...Nc3+= 13.Qc3 f4 14.h4 (14.Ne5 a4+=) 14...fe3 15.de3 cb5 16.cb5 Bb5 17.Ng5 Bd7?? (better is 17...Be2 18.Ke2 Nc6 19.Qg7 Qg7 20.Bg7 Kg7 21.Ne6 Kf6 22.Nf8 Rf8 23.g5 Kf5+=) 18.Qd3+/– g6 19.Qd4 e5 20.Qd5 Kg7 21.Rd1+- Bc7 22.Qb7 Bc6 23.Qc7!! Qc7 24.Ne6 Kf7 25.Nc7 Bh1 26.Be5 Ra7 27.Bc4 Ke7 28.Bd6 Kd7 29.Nb5 Bf3 30.Bf8 Bd1 31.Na7 Bg4 32.Bh6 Kd6 33.Bf4 Kc5 34.Bb8 Kc4 35.Nc6 Kb3 36.Na5 Ka3 37.Nc4 Kb4 38.Ne5 Be6 39.Bd6 Kc3 40.f3 Kc2 41.Kf2 Kd2 42.Bb4 Kc2 43.Ng4 Kb3 44.Bf8 Kc3 45.Nf6 h5 46.Ne4 Kc4 47.Kg3 Kd5 48.Kf4 Bf7 49.Kg5 Ke5 50.Bd6 (50.Bd6 Ke6 51.Bb4+-) 1–0. Welling,Gerard (2400) – Achleitner,Robert, Velden op, 1994.

6.a3 Bd6 7.Nc3 0-0= 8.c5 Be7 =.

6.a3 Bd6 7.Nc3 0-0 8.d4 Nbd7 =.

6.a3 Bd6 7.Bf6 Qf6 8.d4 0-0 =.

6.c5 Be7 +=.

5.a3 a5 =.

5.a3 c6 6.g4 (better is 6.f4+=) 6...g6?? (better is 6...fg4 7.Bg4 Be7=+) 7.g5+- (7...Nbd7 8.gf6+-) 1–0. riverborne – WesternWall, Live Game Caissa's Web, 2006.

5.a3 Bd6 6.Nf3 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.Be2).

5.Bh5 g6!? 6.Be2 Bb4=+.

5.Bh5 Nh5 6.Qh5+= Ke7 7.Qd1 (7.Nf3 Qe8 8.Qg5 Kf7+=) 7...Nc6 8.a3 b6 9.Nf3 Bb7 10.b5 Na5 11.d3 Qd7 12.a4 Re8?? (better 12...a6+=) 13.Ne5+- Qd6 (13...Qc8 14.Qh5 Rg8 15.Qg5 Kd6 16.Ba3 c5 17.bc6 Kc7 18.cb7 Kb7+-) 14.Ba3 Kd8 (14...c5 15.bc6 Qa3 16.Na3 Nc6 17.Nc6 Bc6 18.Nb5+-) 15.Bd6 Bd6 16.Nf7 (16.Nf7 Kc8 17.Nh8 Rh8 18.0-0+-) 1–0. GuestLJTQ – GuestXBTS, freechess.org, 2017.

5.a3 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3).

5.b5 Bb4 6.Nc3 0-0 7.Be2 c6 (7...Nbd7 8.0-0=) 8.0-0 (8.a3 Bd6=) 8...Nbd7 (8...cb5!? 9.Nb5 Nc6=) 9.Nd4+= Ne4?? (better 9...Nb8+=) 10.Ne6 Qe7 (10...Qa5 11.Ne4 fe4 12.Nf8 Bf8 13.f3+-) 11.Nf8 Nf8 12.Ne4 fe4 (12...de4 13.bc6 bc6 14.f3+-) 13.f3 (13.c4 Ng6+-) 13...ef3 14.Bf3 Ng6 (14...Bd6 15.Qe1+-) 15.c4! dc4 (15...Be6 16.bc6 bc6 17.cd5 cd5 18.Bd4+-) 16.bc6 bc6 17.Bc6 Rb8 18.Bd4 Bc5 (18...Be6+-) 19.Bd5 Be6 (19...Kh8 20.Rf7 Bd4 21.Re7 Ne7 22.Qa4+-) 20.Bc5 (20.Bc5 Qc5 21.Be6 Kh8 22.Rb1+-) 1–0. Adlai – Cajs, corr, 2018.

5.b5 Bb4 6.Nc3 c6 7.Bd3 0-0 8.0-0 Qc7 9.Rb1 c5 (9...Nbd7 10.bc6 bc6 11.Nb5 cb5 12.Bf6=) 10.Ne2+= c4 (10...Nbd7!?+=) 11.Bf6+- Rf6 (11...Bd6 12.Bc3+-) 12.Rb4 cd3 (12...Nd7 13.Qb1+-) 13.cd3+- 1–0. Janek – Freeday, internet, 2018.

5.b5 Bb4 6.Be2 0-0=.

5.b5 Bd7 6.a4 a6 7.c4 ab5 8.ab5 Ra1 9.Ba1 Bd6 10.cd5 ed5 11.Qb3 Be6 (11...0-0 12.Be2+=) 12.Nd4+- Qe7 13.Ne6 Qe6 14.Bf6 gf6 15.Nc3 Nd7 (15...c6 16.bc6 bc6 17.Bd3+-) 16.Qd5 Qd5 17.Nd5 c6 18.Nc3 Ne5 (18...Ke7!?+-) 19.f4+- Nd7 (better 19...Ng6+-) 20.Bd3 cb5 (20...Ke7 21.Bf5 Bb4 22.bc6 bc6 23.Kf2+-) 21.Nb5 Ke7 22.Bf5 Nc5 (22...h5 23.Ke2+-) 23.Ke2 h5 (23...Rg8 24.g3+-) 24.Rb1 h4 (24...Rb8 25.d4 Na6 26.Nd6 Kd6 27.Rb6 Ke7 28.Re6 Kf7 29.Rd6+-) 25.Na7 Rg8 (25...Bb8 26.Nc8 Kd8 27.Rb5+-) 26.d4 Rg2 (26...Kd8 27.dc5 Bc5 28.Kf3+-) 27.Kf3 Rh2 (27...Rg8 28.Nc8 Rc8 29.Bc8 Na4 30.Rb7 Kf8+-) 28.Nc8 Kd8 29.Nd6 Na4 30.Rb7 Nc5 31.dc5 Rf2 (31...Rh3 32.Bh3 f5 33.Bf5 h3 34.Rd7) 32.Kf2 h3 33.Rd7 1–0. Pierre – Ares, internet, 2019.

5.b5 Bd7 6.a4 Bd6 7.c4 c6 8.d4 0-0 9.Ba3 (9.c5 Be7+=) 9...Qe7 (9...Ba3!? 10.Ra3 a6=+) 10.Bd6+= Qd6 11.Nc3 Ne4 12.Qb3 Nc3 (12...Qc7 13.Rc1+=) 13.c5 Qc7 14.Qc3 cb5 (14...Be8!?+=) 15.ab5+- a6 (15...a5 16.Bd3+-) 16.Bd3+- b6 (better 16...a5+-) 17.c6 (17.ba6?! Bc8+-) 17...Bc8 (17...Rc8 18.0-0+-) 18.Qa3 a5 19.Ne5 Re8 20.0-0 Qe7 21.Qb3 Ra7 22.g3 Rc7 23.Be2 g6 24.Bf3 Qd6 25.h4 Kg7 26.Kg2 Rce7 27.h5 g5 28.Rh1 h6 29.Qc3 Rc7 30.Be2 Ree7 31.Qd2 Re8 32.Bd3 Rg8 33.Rhc1 Kf6 34.Ra4 Rgg7 35.Rg1 Rh7 36.g4 Rhg7 37.Raa1 Rh7 38.Qe2 Rhg7 39.Kh3 Rg8 40.Kg3 Rf8 41.Kg2 Rg8 42.Kh3 1–0. Gu14 – Gu30, free online game, 2018.

5.c4?! Bb4 6.cd5 Qd5 7.Qa4 Nc6 8.Bb5 Be7 9.Nc3 0.04/0 9...Qd8 0.06/0 10.Bc6 0.00/0 10...bc6 0.18/0 11.Qc6 0.23/0 11...Bd7 0.26/0 12.Qc4 0.25/0 12...Rb8 0.21/0 13.Rb1 0.17/0 13...0-0 0.15/0 14.0-0 0.01/0 14...Bd6 0.01/0 15.Ba1 0.23/0 15...Kh8 0.64/0 16.Rb8 0.03/0 16...Qb8 0.28/0 17.Rb1 0.51/0 17...Qe8 0.08/0 18.d4 0.36/0 18...Qg6 0.79/0 19.Ne5 0.75/0 19...Be5?! 1.34/0 20.de5 1.26/0 20...Ne8 1.66/0 21.Ne2?! 0.09/0 21...f4 0.93/0 22.Rd1 0.93/0 22...f3 1.21/0 23.Ng3 0.97/0 23...Bc8? 1.97/0 24.Qc5?! 1.25/0 24...Qf7 0.91/0 25.Qa7 1.29/0 25...fg2 1.34/0 26.f4 1.34/0 26...g5 1.54/0 27.Rd4? 0.00/0 27...Qg6 0.00/0 28.Qa3?! 0.58/0 28...Qb1 0.31/0 29.Kg2 0.00/0 29...Kg8 0.42/0 30.Qb2 0.29/0 30...Bb7 0.66/0 31.e4?! 0.15/0 31...Qb2 0.41/0 32.Bb2 0.43/0 32...gf4 0.55/0 33.Nh5 0.39/0 33...Ng7?! 1.28/0 34.Nf6 1.31/0 34...Kf7 1.23/0 35.Rd7 1.19/0 35...Kg6 1.25/0 36.Kf3 1.21/0 36...Nh5? 2.33/0 37.Rc7 2.51/0 37...Nf6?! 3.01/0 38.ef6 3.12/0 38...Ba8?? 6.07/0 39.Rg7 6.25/0 39...Kh6?! 6.86/0 40.Be5 6.97/0 40...Bc6?? #5/0 41.Bf4?? 6.92/0 41...Kh5 6.09/0 42.Rh7? 3.22/0 42...Kg6 3.28/0 43.Rc7?! 2.75/0 43...Ba4 3.05/0 44.e5 2.92/0 44...Kf5?? #4/0 45.Rc4?? 2.06/0 45...Bb5 2.56/0 46.Rb4 2.51/0 46...Bc6 2.57/0 47.Ke3 2.74/0 47...Rh8 3.02/0 48.Bg3 3.36/0 48...Ra8 3.58/0 49.Rb6? Time forfeit 2.32/0 1-0. carlos78 (2225) - PersianBoy (2170), Rated Blitz game, 2015.

5.d3 Bb4 6.Nbd2 -/+.

5.d3 Be7 6.Be2 (6.a3 0-0=) 6...0-0 (6...Bb4!? 7.Nc3 Nc6-/+) 7.a3= Qe8 8.0-0 c6 9.c4 Nbd7 10.cd5 ed5 11.Nbd2 Qf7 12.Qc2 h6 13.e4 (13.Nb3 Bd6+=) 13...fe4 14.de4 de4 15.Ne4 Ne4?? (15...Nd5 16.Rfe1+=) 16.Qe4?? (better is 16.Bc4 Nef6 17.Bf7 Rf7 18.Rfe1+-) 16...Nf6+= 17.Qc2 Nd5 18.Bc4 Bf5 19.Qb3 Bf6 (19...b5!? 20.Bd5 cd5=) 20.Bf6+= Qf6 21.Rfe1 Kh8 22.Bd5+/– cd5 23.Qd5 b6 24.Rac1 Rad8 25.Qc6 Rc8 26.Qf6 Rf6?? 27.Rc8+- Bc8 28.Re3 Rf8 29.Ne5 Kg8 30.g3 Re8 31.Kf1 Bh3 32.Ke2 Bd7?? 33.Nd7 Re3 34.Ke3 Kf7 35.f4 Ke7 36.Ne5 Ke6 37.Ng4 Kf5 38.Ne5 Ke6 39.h3 g5 40.Ke4 a5. Fournier,Frederic (1790) – warb (1865), Active (3/0), 2005.

5.Bf6 gf6 6.Nd4 (6.a3!?=) 6...Bb4=+ 7.Qh5 Kf8 (7...Ke7 8.a3 Bc5 9.Nc3=+) 8.Qh6 Kg8 9.c3 (9.Qh4 Be7=+) 9...Bf8 10.Qh4 Nc6 (10...e5 11.Nb3=+) 11.Nc6= bc6 12.c4 Ba6 (12...Rb8 13.Nc3=) 13.Nc3 Bc4 (13...Rb8 14.Qg3 Bg7 15.c5 Bf1 16.Rf1=) 14.Bc4+= dc4 15.Qc4 Qd6 16.0-0 Kg7 17.d4 Be7 18.Rab1 Rhb8 19.Rb8 (19.Ne2 Rb6+=) 19...Rb8= 20.h3 Qb4?? (20...Rb4 21.Qa6 c5 22.Qa7 cd4 23.ed4 Qc6=+ (worse 23...Rd4 24.Nb5 Qc5 25.Qc5 Bc5 26.Nd4 Bd4 27.a4+-)) 21.Qe6+- Qc3 (21...Bd6 22.Qd7 Kh8 23.Qc6+-) 22.Qe7 (22.Qf5 Bd6-/+) 22...Kg8 23.Qf6 Rb2 (23...Qc2 24.Qe6 Kg7 25.Qe5 Kg8 26.a3+-) 24.Qe6 (24.Qg5 Kh8+-) 24...Kg7 25.Qf5 Ra2 (25...Qc4 26.a3+-) 26.Qe5 Kg8 (26...Kf7 27.Qc7 Kg6 28.Qd6 Kf7 29.Qd7 Kf8 30.Qh7+-) 27.Qc7 (better 27.Qe6 Kf8 28.Qa2+-) 27...a5 (27...Qc2 28.Qb8 Kf7 29.Qf4 Kg8 30.e4+-) 28.Qb8 Kg7 29.Rb1 (better 29.Qe5 Kf7 30.Qf5 Kg7 31.Qd7 Kf8 32.Qh7+-) 29...Qd2 (29...Ra1 30.Qe5 Kg8 31.Qe8 Kg7 32.Qe7 Kg8 33.Ra1 Qa1 34.Kh2 Qc3+-) 30.Rb7 (30.Qc7 Kh6 31.Qc6 Kg7 32.Rb7 Kg8 33.Qe8) 30...Kg6 31.Qd6 Kf5 32.Rf7 (32.Qe5 Kg6 33.Rg7 Kh6 34.Qg5) 32...Ke4+- 33.Qe5 (better 33.Qc6 Kd3 34.Qb5 Kc2 35.Rc7 Qc3 36.Rc3 Kc3 37.Qc5 Kd3 38.d5 Ra1 39.Kh2+-) 33...Kd3 34.Qf5 Ke2 35.Qf3 Kd3 36.Qf5 (36.Qc6 Ra1 37.Kh2 Ke2+-) 36...Ke2 37.Qh7 Qe1 38.Kh2 Qf2 (38...Qc1+-) 39.Rf2 (39.Rf2 Kf2 40.Qf7 Ke3 41.Qa2 Kd4 42.h4+-) 1-0. Fuirio (1620) – dsaewq, Rated Classical game, lichess.org, 2013.

6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.c4 Qa5 (9...Be7 10.Nc3=) 10.Bf6 gf6 11.Nd4 (11.cd5 cd5 12.Nd4+=) 11...Bb4 (better 11...e5!? 12.Qh5 Kd8 13.Nf5 Qa1+=) 12.Qh5+- Ke7 13.Qh6 Bd2?? (better 13...Rf8 14.cd5 cd5+-) 14.Nd2+- Qa1 15.Ke2 e5 (15...Kf7 16.g4! fg4 17.Qh5 Ke7+-) 16.Qg7 Kd6 17.Qf6 Be6 18.Qe6 (18.Qe6 Kc5 19.N4b3 Kb6 20.Na1+-) 1–0. GuestPQBY – GuestPXLV, freechess.org, 2019.

6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.Be5 Bd6 10.Be2 0-0 11.0-0 Be5 12.Ne5 Qd6 13.f4 Nbd7 14.d4 c5 (14...Ne4 15.Qd3=) 15.c4 cd4 (15...Ne4!?=) 16.Qd4+= Ne4 17.Rd1 Ndf6 (17...Ne5 18.fe5 Qb4 19.cd5 Qd4 20.ed4 ed5 21.Rc1=) 18.Nd2+/- b6 (better 18...Rd8!?+/-) 19.Ne4+- fe4 20.g4 h6 21.Nc6 Bb7 22.Qb6 Bc6 23.Qc6 (23.bc6?! Rc8+=) 23...Qc6 24.bc6 Rc8 25.g5 hg5 26.fg5 Nh7 (26...Rc6 27.gf6 dc4 28.Rd8 Kf7 29.fg7 Kg7 30.Bd1+-) 27.cd5 ed5 28.Rc1 Ng5?? (28...Rc7 29.h4 Kf7+-) 29.c7 Kf8 (29...Nf3 30.Kf2 Kf7 31.Ba6+-) 30.Bg4 Nf3 (30...Ra8 31.c8Q Rc8 32.Rc8 Ke7 33.Rc7 Kf6 34.Rc6 Ke7 35.Kf2+-) 31.Kg2 Ne1 (31...Rc7 32.Rc7 Ng5 33.h4+-) 32.Kg3 Nd3 (32...Rc7 33.Rc7 Nd3+-) 33.Bc8 Nc1 (33...Kf7 34.Rf1 Nf2 35.Rf2 Kg8 36.Bg4 Kh7 37.c8Q d4 38.Rf7 de3 39.Qc3 e2 40.Qg7) 34.Bg4 (34.Bg4 Kf7 35.c8Q Ne2 36.Kh4 Ng3 37.Qd7 Kg6 38.Kg3 Kh6 39.Qf7 g6 40.Qg8 d4 41.h4 de3 42.Qh8) 1-0. DEFFM – GuestXGNB, freechess.org, 2021.

6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.Ne5 Bd6 10.f4 0-0 11.c4 Nbd7 (better 11...Ne4!?=+) 12.bc6+= Ne5 13.fe5 (worse 13.Be5 Be5 14.fe5 Ne4=+) 13...Be5 (13...Ne4 14.Qb3 dc4 15.Qc4+= (worse 15.Bc4 Qh4 16.Ke2 Be7-/+)) 14.Be5 bc6 15.Be2 Ne4 (15...Ba6 16.Na3+-) 16.0-0 Ng5 17.cd5 cd5 18.Qb3 Nf7 19.Bb2 Nh6 20.Qc3 Rf7 21.Rc1 Bb7 22.Bh5 (22.Qe5!? Ng4 23.Qe6 Qe7 24.Qe7 Re7+-) 22...g6 (22...Rd7+-) 23.Qh8 1-0. DEFFM – GuestWXMJ, freechess.org, 2021.

6.a4 ab5 7.ab5 Ra1 8.Ba1 Nbd7 9.c4 Nb6 10.Qc2 dc4 11.Bc4 Nc4 (11...Bd6 12.Bd4=) 12.Qc4+= Bd6 13.Nd4 (13.0-0 0-0+=) 13...Ke7 (better 13...e5!? 14.Nf3 Qe7=+) 14.f4= Re8 15.0-0 Kf8 16.Bb2 h6 (16...Qe7 17.Nf3=) 17.Ba3 (17.Nc3 e5 18.fe5 Re5+=) 17...Bd7= 18.Bd6 cd6 19.Nc3 Qb6 20.Qb4 (20.h3 g6=) 20...Kf7= 21.Qb3 (21.Ra1 e5 22.Nf3 Kg8=) 21...g6 22.Na4 Qc7 23.Ne2 Ne4 24.Rd1 Rc8 25.Nec3 d5 26.Ne4 de4 27.Nc3 Ke7 28.g3 Qc5 Attacking the isolated pawn on b5 29.Ra1 Qd6 30.Qb2 Kf7 31.Ra7 Qb6 32.Ra1 g5 33.Qb4 g4 (33...gf4 34.gf4 Be8 35.Qb2=) 34.Kg2 h5 35.Ra4 Rb8 36.Ra5 Kg6 37.Ne2 Bc6 (37...Rc8 38.Nd4+=) 38.Qd6 (38.Qe7!? Bd5 39.Qg5 Kf7 40.Qh5 Kg7 41.Ra4 Qb5 42.Qg5 Kf7 43.Nc3=) 38...Re8= 39.Qa3 (worse 39.bc6 Qa5 40.Qd7 Qd8 41.Qb7 Qd2-/+) 39...Bd5 (39...Bb5? 40.Qb4 Qa5 41.Qa5 Be2 42.Qc7+-) 40.Qc3 Re7 (40...Qd8!?=) 41.Ra8+- Rg7 (41...Qb5?? 42.Rg8 Kh6 43.Qf6 Kh7 44.Rh8) 42.Nd4 Kh7 43.Qc8 Qc7 44.Qh8 Kg6 45.Rg8 Rg8 46.Qg8 (46.Qg8 Qg7 47.Qd8+=) 1–0. DEFFM – GuestBRJH, freechess.org, 2019.

6.a4 c6 7.Nc3 ab5 8.ab5 Ra1 9.Qa1 Bd7 10.Qa7 Qc8 11.Na4 cb5 (11...Bd6 12.Nd4+-) 12.Nb6 Qc6?? (better 12...Qc7 13.Nd7 Nbd7 14.Bb5 Bd6+-) 13.Qb8+- Kf7 14.Ne5 Ke7 15.Ba3 b4 16.Bb4 (16.Ned7 ba3 17.Qa8 Nd7 18.Qa3 Kf7 19.Nd7 Ba3 20.Ne5 Kf6 21.Nc6 bc6=+) 16...Qd6 (16...Qc5 17.Bc5) 17.Bd6 1–0. Pierre – Narimia, internet, 2020.

6.Ne5 Bd6 7.ba6 ba6 8.c4 0-0 9.d4 Ne4 (9...Bb7 10.Be2=) 10.a3 (10.Nc3 Nd7 11.Nc6 Qh4=) 10...Nd7=+ 11.Nd2 (11.Nd7 Bd7 12.Nc3 Qh4=) 11...Be5 (11...Ne5 12.de5 Rb8 A) worse 13.ed6 Rb2 14.Ne4 fe4-/+ (worse 14...de4 15.Qd4 Rb3 16.c5-/+); B) 13.Ne4 fe4 14.Qd2= (worse 14.ed6 Rb2 15.Be2 cd6-/+)) 12.de5 (12.Ne4 fe4 13.de5 Rb8=) 12...Rb8 13.Qc2 Nd2 14.Qd2 Bb7 15.Rd1 (15.cd5 Bd5 16.Rc1 c5=+) 15...Qh4 Black intends f4 (15...c5 16.Bd3=) 16.Qd4 (16.Qc2 c5=+) 16...f4 (16...Qe7 17.cd5 ed5 18.Bd3=) 17.c5 Qg5 18.h4 Qg4 (18...Qe7 19.Rc1 Bc6 20.ef4=) 19.Bc1 Bc6 20.ef4 (20.a4 Rb3 21.ef4 a5=) 20...Rb1 (20...Bb5 21.Be3=) 21.f3 (21.Rh3!? Bb5 22.Bb5 Rb5 23.c6=) 21...Qg3=+ 22.Qf2 Qf2 23.Kf2 Nc5 24.Be2 Bb5 (24...Ba4 25.Be3 Nd3 26.Kg3 Bd1 27.Bd3=) 25.Be3= Rb2 26.Bc5 Re2 27.Kg3 Rd8 28.Rde1 (28.Bd4 Rc8=) 28...Rb2 (28...d4 29.Re2 Be2 30.Kf2=+) 29.Rb1 (29.f5 Kf7=+) 29...Rb1 30.Rb1 d4 31.Kf2 Rd5 32.Rc1 Ba4 33.Ke2 (33.Bb4 d3 34.Rc7 d2 35.Rc8 Kf7 36.Rf8 Kg6=) 33...d3 34.Kd2 Bc2 ½–½. Seiler,Werner (2340) – Leisebein,Peter (2425), RSS7E pro–42, 2005. (=1.Nf3 f5 2.b4 Nf6 3.Bb2 e6 4.b5 d5 5.e3 a6)

6.a4 b6 7.a5 c4 (7...ba5 8.Bc3=) 8.ab6 (8.d3 Bb4 9.Bc3 ba5 10.dc4 a6+=) 8...Qb6= 9.Nd4 (9.Bf6 gf6 10.d3 Qb5 11.dc4 dc4=) 9...e5 10.Nf3 e4 11.Bd4 (11.Nd4 Bd6=) 11...Qb5=+ 12.Nc3 Qb7 13.Rb1 (13.Bf6 gf6 14.Nd4 Nc6 15.Qh5 Kd8 16.Nc6 Qc6=+) 13...Qc6 (13...Qd7 14.Ne5 Qe6 15.Nb5=+) 14.Bf6= gf6? (better 14...Qf6!? 15.Nd4 Qf7=) 15.Nd4+- Qd7 16.Rb5 Bb7? (better 16...Qf7+-) 17.Qb1+- Bc6 (17...Bc8 18.Rb8 Rb8 19.Qb8+-) 18.Rb8 Rb8 (18...Ke7 19.Nc6 Qc6 20.Qb5 Qb5 21.Rb5+-) 19.Qb8 Kf7 20.Be2 Bg7 (20...Rg8 21.Bh5 Kg7 22.Nc6 Qc6 23.Qa7 Kh8+-) 21.Bh5 Ke7 22.Qb4 Kd8 23.Qc5 Bb7 (23...Ba8 24.Ncb5 Re8 25.Be8 Ke8 26.Nc7 Kf7 27.Na8+-) 24.Ncb5 a6 (24...Re8 25.Nd6 Re7 26.Nb7 Qb7 27.Nc6 Qc6 28.Qc6 Rd7+-) 25.Ne6! (25.Ne6 Qe6 26.Qc7) 1–0. Janek – typhf, internet, 2016.

6.c4 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Bf6+= gf6 11.cd5 ed5 12.Nh4 d4 (12...Kd8!?+=) 13.Qh5+/- (13.Qh5 Kd8 14.Ng6+/-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

6.c4 b6 7.Be2 Bd6 8.0-0 0-0 9.Qb3 Bb7 10.d4 Nbd7 11.Nbd2 Ne4 12.Ne4 fe4 13.Ne5 Be5 (13...Qh4 14.Rad1 Ne5 15.de5=) 14.de5 d4? (better 14...a5=) 15.ed4+- cd4 16.Bd4 Qc7 (16...Qg5 17.Qe3 Qe3 18.fe3 Rf1 19.Rf1+-) 17.Rac1 Nc5 18.Qh3 Rae8 19.Qa3 Ra8 20.Bg4 Bc8 (20...Nd3 21.Be6 Kh8 22.Qd6 Qd6 23.ed6+-) 21.Qe3 Nd3 22.Rc3 (worse 22.Qe4 Nc1 23.Rc1 Rb8+-) 22...Ne5? (22...Qb7+-) 23.Qg3 (23.Qe4?! Ng4 24.Qg4 e5+-) 23…Nf3 1–0. DEFFM – GuestDWJT, freechess.org, 2019.

6.c4 dc4 7.Bc4 b6 8.Ng5+- Nd5 (8...Qe7 9.Qb3+-) 9.f4 (better 9.Qh5!? g6 10.Qh3 Qg5 11.Bh8+-) 9...h6?? (better 9...h5+-) 10.Qh5+- (10.Qh5 Kd7 11.Bd5 hg5 12.Qf7 (worse 12.Qh8 ed5 13.Qg8 Bb7+-) 12...Qe7 13.Qe7 Ke7 14.Ba8 gf4 15.ef4+-) 1–0. DEFFM – GuestCWCC, freechess.org, 2019.

6.c4 Bd6 7.a4 0-0 8.Be2 Bd7 (8...Nbd7 9.cd5 ed5 10.0-0=) 9.Nc3 Be8 (9...a6 10.0-0=) 10.Qb3 Bc7 (10...Bf7 11.0-0=) 11.Ng5 (11.d4 Nbd7+=) 11...Qd6 (11...Bf7 12.d4 cd4 13.ed4+=) 12.d4 (12.cd5!? ed5 13.Bf3+-) 12...Nbd7= 13.a5 (13.Ba3 Ne4 14.Nge4 de4 15.Rd1+=) 13...b6 (13...Bg6!?=) 14.ab6 (14.cd5 ed5 15.Bf3 c4+-) 14...Bb6 15.Na4 (15.cd5!? ed5 16.Nd5 Nd5 17.Bc4+-) 15...Ba5 16.Kf1 (16.Bc3 Bc3 17.Nc3 a5+=) 16...Bb4 17.dc5 Bc5 18.Nc5 (18.Bf6 gf6 19.Nh3 d4+-) 18...Nc5+= 19.Qb4 Nfd7 (19...dc4 20.Ne6 (worse 20.Qc4 Bb5 21.Qc2 Be2 22.Ke2 Nfe4 23.Ne4 Ne4-/+; 20.Bc4 Nd5 21.Qa3 Bf7+-) 20...Qe6 21.Bc4+- (21.Qc5 Rc8 22.Qa7 Bb5=+)) 20.Ra6!+- Nb6 (20...Na6 21.Qa3 Double attack (21.Qd6 Pinning; 21.Qd6 Deflection; 21.Qa3 Decoy)) 21.Bd4+- Rc8 22.f4 (22.Bc5 Rc5 23.Ne6 Qe6 24.Qc5 Qe4+-) 22...Bb5? (better 22...Bf7+=) 23.Ra7 (23.cb5 Rfd8 24.Ra7 Rd7 25.Rd7 Nbd7+-) 23...Nbd7 (23...Bd7 24.Ra6! Rc6 25.Bc5 Qc5 26.Qc5 Rc5 27.Rb6 dc4+-) 24.cb5 e5 (24...Qb8 25.b6! Rc6+-) 25.Rd7! Qd7 (25...Nd7 26.Qd6 Double attack (26.Qd6 Pinning; 26.Qd6 Deflection; 26.Qd6 Decoy); 25...Qd7 26.Bc5 Deflection (26.Bc5 Remove defender; 26.Bc5 Overloading)) 26.Bc5 Rfe8 27.fe5 Qc7 28.Bd4 Qc1 (28...Qd8 29.Nf3 Rc1 30.Ne1+-) 29.Qe1 Qa3 (29...f4 30.Kf2 fe3 31.Be3+-) 30.Kf2 Rc2 31.Qd1 Qa2 (31...Rec8 32.Rf1+-) 32.Qd3 h6 33.Nf3 Rec8 (33...Rb8 34.Ra1 Qc4 35.Qc4 dc4 36.Ne1 Re2 37.Ke2 Rb5 38.Ra4+-) 34.Re1 (34.Ra1 Qc4 35.Ne1 Qd3 36.Nd3 Rb8+-) 34...g6 35.Ng1 (35.Ra1!? Qc4 36.Ne1 Qd3 37.Nd3 Rb8+-) 35...Qa8 (35...Qc4 36.Rd1+-) 36.Ra1 Ra2 37.Ra2 Qa2 38.b6 Kf7 (38...Rb8+-) 39.b7 Rb8 40.Qb5 g5 41.Qd7 Kg6 (41...Kf8 42.e6 Qe2 43.Ne2 Rb7 44.Qd8) 42.Qd6 (42.Qd6 Kf7 43.Qf6 Ke8 44.Bc5 Rb7 45.e6 Qe2 46.Ne2 Rf7 47.Qf7 Kd8 48.Qd7; 42.Qe6 Kg7 43.Qf6 Kh7 44.Qf7 Kh8 45.e6) 1–0. Pisarsky,Georgy (2050) – Lukintsov,Alexander, Sukharev Memorial Seniors Open, 2011.

6.c4 Bd6 7.a4 0-0 8.e4? Bc7?? (8...fe4 9.Ng5-+) 9.Bf6 (better 9.e5 Ne4 10.Qc1=) 9...Rf7?? (better 9...Qf6 10.e5 Be5-+) 10.cd5 (better 10.Bd8 Bd8 11.ed5 Bf6+-) 10...e5?? (10...Qf6!? 11.Nc3 Re7+=) 11.Nc3 (better 11.Bd8 Bd8 12.d6+-) 11...Qd6?? (better 11...Rf6 12.Bd3 a6+-) 12.Be5+- Be6 (12...Qh6 13.Bc4 Bd8 14.Bb8 Rb8 15.Ne5+-) 13.Ng1 (better 13.Bd6 Bd6 14.de6 Re7+-) 13...Qd5 (13...Qe5 14.Nf3 Qd6 15.de6 Re7+-) 14.d3 (better 14.ed5 Be5 15.de6+-) 14...Qd3?? (better 14...Qe5 15.Rc1 Qf6=+) 15.Bf6 (15.Bf6 Qd1 16.Rd1 Rf6 17.Nd5 Bd5 18.Rd5 fe4 19.Bc4= (worse 19.Rc5 Ba5 20.Ke2 Nd7-/+)) 1–0. Adlai – Zemic, internet, 2021.

6.c4 Bd6 7.Be2 =.

6.c4 Be7 7.a4 a5 (7...0-0 8.Be2=) 8.Be2 0-0 9.0-0 b6 (9...Nbd7 10.cd5 ed5 11.Qc2=) 10.d4+/– Bb7 11.Nbd2 (11.Nc3 Qd6+=) 11...Nbd7? (better is 11...Qc7!?=) 12.Ng5+/– Qb8 (12...Qc8!?+/–) 13.Ne6+- Re8 14.cd5 Bd5 (14...Nd5 15.Bf3 Bf6+-) 15.Nf4+- Bb7 16.Nf3 Bd6 17.Qb3 (17.Bc4!? Kh8 18.Ng5 Re7 19.dc5 Bf4 20.ef4 Nc5+-) 17...Kh8 18.Ng5 Re7 (18...Bf4?? 19.Nf7 Kg8 20.Nh6 Kh8 21.Qg8 Rg8 22.Nf7) 19.Nf7 Rf7 20.Qf7 Bf4 21.ef4 Bd5 22.Qe7 Qf4 23.dc5?? (better is 23.Qe3 Qd6 24.dc5 Nc5 25.Be5+-) 23...Re8+= 24.Bf6 Re7 25.Be7 Qe5 (25...Nc5? 26.Bc5 Qg5 27.g3 bc5 28.Rad1+-) 26.Rad1 Qe7 27.Rd5 Nc5 28.Rfd1 h6 29.Bh5 Kh7? 30.Rd6+- Ne6 31.Rb6 Nf4 32.Bf3 h5? 33.Rbd6 h4 34.h3 Ng6 35.b6 Ne5 36.Ba8 f4 37.Be4 g6 38.b7 Qc7 39.Rd8 1–0. Nadanian,Ashot (2425) – Akbaev,Kazbek (2475), Khanty–Mansiysk RUS, World Rapid Ch, 2013.

6.c4 Be7 7.Nc3 0-0 =.

6.c4 Be7 7.cd5 ed5 8.Be2 Be6 (8...0-0 9.0-0=) 9.Ng5 Bg8 (9...Bd7 10.Bh5 g6 11.Be2=) 10.0-0+= h6 (10...a6 11.Qc2+=) 11.Nh3 (11.Bh5 Kf8 12.Nh3 Bf7 13.Bf7 Kf7+=) 11...g5 (11...Bf7 12.Qc2+=) 12.Qc2 Be6 13.Bh5 Kd7 (13...Nh5 14.Bh8 Pinning (14.Bh8 Deflection)) 14.Bg6 Ne4 (14...f4!?+=) 15.f3+- Nd6 16.Qc5 (better 16.Bh8 Qh8 17.Na3+-) 16...Nc4= 17.Qd4 Nb2 (17...Rf8!? 18.Bc3 Bf6=) 18.Qb2+= Bf6 19.Nc3 (19.d4+=) 19...h5 (better 19...d4!? 20.ed4 Bd4 21.Kh1 Qf6+=) 20.Qc2+- Bc3? (better 20...d4!? 21.Ne2 Ke7 22.Qc5 Qd6 23.Qd6 Kd6 24.Nd4 Bd4 25.ed4 Rh6 26.Bf5 Bf5 27.Ng5 Kd5=) 21.Qc3+- (21.dc3?! Qf6 22.c4 Qg6 23.cd5 Bf7=) 21...Rh6?? (21...Rg8 22.Bh5 Qb6+-) 22.Qg7 (22.Qg7 Kd6 23.Qh6+-) 1–0. Anonymous – Anonymous, lichess.org, 2020.

6.c4 Be7 7.Be2 0-0 (7...a6 8.0-0=) 8.0-0 (8.d4 Nbd7=) 8...Nbd7 (8...a6 9.Qa4=) 9.d3 (9.d4 dc4 10.dc5 Nc5 11.Bc4 Bd7=) 9...Qc7 (9...a6 10.Nc3=) 10.a4 (10.Nc3 dc4 11.dc4 Bd6=) 10...a5 (10...a6 11.Nc3=) 11.Nbd2 (11.Nc3 dc4 12.dc4 Ng4+=) 11...b6 (11...f4 12.Qb3=) 12.Rb1 (12.Rc1 Bb7=) 12...Bb7 13.Ng5 (13.Rc1 e5=) 13...Qd6 14.Ba3 (14.cd5 ed5 (14...Nd5? 15.Nc4 Qb8 16.Ne6+-; 14...Bd5?! 15.Nc4 Qc7 16.Bf3=; 14...Qd5? 15.Bf3 Qd3 16.Bb7+-) 15.Re1 Rae8=) 14...Rae8 (14...f4 15.ef4 Rad8 16.d4=) 15.d4 Bd8 (15...h6 16.Ngf3=) 16.Ngf3 Bc7 17.Ra1 (17.dc5 Nc5 18.cd5 Nfe4=) 17...Ne4 (17...Ng4 18.h3 Nh2=) 18.g3 (better is 18.Rc1!?=) 18...Nc3-/+ 19.Qe1 Ne2 (19...e5 20.Rc1 Ne2 21.Qe2 ed4 22.Nd4-/+) 20.Qe2 e5 21.de5 Ne5 22.Bb2 Ng4 23.Nh4 Qh6 24.h3 Ne3!-+ 25.Qf3?? Nf1 26.Nf1 f4 27.Qg4 d4 28.Qd7 Qd6 29.Qg4 fg3 30.Ng3 Rf4 31.Qg7 Kg7 32.Nhf5 Kh8 33.Nd6 Bd6 (33...Bd6 34.Kf1 Ref8-+) 0–1. Mauron,Regis (1780) – Costagliola,Marina (2250), St Quentin op 5th, 2002.

6.Be2 Bd6 7.c4 b6 8.d4 Bb7 9.0-0 (9.dc5 bc5 10.0-0 0-0=) 9...Nbd7 (9...0-0 10.Nc3=) 10.Nbd2 (10.cd5 ed5 11.Qc2 f4 12.ef4 0-0+=) 10…Qc7 (10...0-0 11.cd5 Nd5 12.Nc4=) ½–½. Korchut,Adam – Neri,Enzo, corr ICCF TT 6/02/1, 2002.

6.Be2 Nbd7 =.

6.a4 a5 7.c4 (7.Nc3 Bd6+=) 7...Bc5 (7...Bd6!?=) 8.Be2+= 0-0 9.0-0 Ne4 (9...Bd6 10.d4+=) 10.d3+- Nf6 11.Nbd2 Nbd7 12.Ng5 Nb6 13.d4 Bb4 14.c5 Nc4? (better 14...Bd2 15.Qd2 Nc4+-) 15.Nc4+- dc4 16.Bc4 Nd5 (16...Qe7 17.Qc2 Nd5 18.Nf3+-) 17.Qh5 h6 18.Nf3 Bd7 19.Ne5 Rb8 20.Qg6 Rf6 21.Qg3 Be8 22.Rad1 cb5 23.ab5 b6 (23...a4 24.Ra1 Ra8 25.Ba3+-) 24.c6 Bd6 25.Qf3 Be5 (25...a4+-) 26.de5 Rf7 (26...Rg6 27.Bd5 ed5 28.Rd5+-) 27.Bd5 ed5 28.e6 Re7 (28...Ra7 29.Rd5 Qe7 30.Qf5+-) 29.Rd5 Qc8 30.Rd6 Re6 (30...a4 31.Qf5 Ra8+-) 31.Re6 Qe6 32.Qg3 (32.Qg3 Qg6 33.Qb8+-) 1–0. DEFFM – almeera, freechess.org, 2019.

6.a4 a6 7.Na3 (7.Be2 Bd6=) 7...Bd6 8.c4 0-0 9.Qb3 (9.Be2 ab5 10.ab5 Qe7=) 9...Nbd7=+ 10.ba6 (10.Be2 Nc5 11.Qc2 Qa5=) 10...ba6 11.Nc2 (11.Qc2 Ne4=) 11...Nc5 (11...e5 12.Be2-/+) 12.Qa2=+ Nce4 13.Be2 Bd7 (13...Qc7 14.0-0=) 14.a5 Kh8 (14...Ng4 15.0-0=) 15.0-0 (15.d3 Nc5+=) 15...g5 (15...Qc7!?=) 16.d3+- g4 17.Ne5 Nc5 18.f4 (18.Rab1 Qc7 19.d4 Nb7+-) 18...Kg8 (18...gf3 19.Nf3 Rb8 20.Rab1+-) 19.g3 (19.Bd4!?+-) 19...Rb8+= 20.cd5 (20.Rab1 Nb7 21.Bc3 Qc7+-) 20...cd5 21.Nd7 (21.Nd4 Qc7 22.Rfc1 Be5 23.Rc5 Qc5 24.fe5 Ne8=+) 21...Qd7= 22.Nd4 (22.Rfb1 Qc7=) 22...Kf7 (22...Na4! 23.Rfb1 Nb2 24.Rb2 Rb2 25.Qb2 Rb8=) 23.Rfc1+= Kg6 (23...Kg7 24.Bc3+=) 24.Ba3 (24.Rc2 Rb4+=) 24...Rbc8 (24...Rfc8 25.Qd2=) 25.Rab1 (25.Qd2 Kg7+=) 25...Qe7 (better 25...Qa4!?=) 26.Rb6+- Nfd7 27.Nc6 Qe8 (27...Qf6 28.Na7 Nb6 29.ab6+-) 28.Na7 Nb6 29.ab6 Qa4? (29...Rb8!? 30.Bc5 Bc5 31.Rc5 Rb6+-) 30.Nc8+- Rc8 31.d4 Nd3?? (31...Rc6 32.Bd1 Qa5 33.dc5 Rc5+-) 32.Rc8 Ba3 (32...Nc1 A) 33.Bd6? Qa2 (33...Na2?? 34.b7 Qa5 35.Rg8 Kf7 36.Kf1+-) 34.Bb5 Ne2 (34...ab5?! 35.b7 Ne2 36.Kf1=) 35.Be2 Qe2-+; B) 33.Rc1 Qa3 34.Qa3 Ba3 35.Rc6+-) 33.b7 Qb4 34.b8Q (better 34.Bd3 Qb7 35.Qc2+-) 34...Qe1 35.Bf1 Qe3 36.Kh1 Qe4 37.Qg2 Nf2 38.Kg1 Nh3 39.Qh3! Qd4 (39...gh3 40.Rg8 Double attack (40.Rg8 Decoy)) 40.Kh1 gh3 41.Qe5 (41.Bh3?! Qe4 42.Kg1 Qd4 43.Kf1 Qd3 44.Kg2 Qe2 45.Kg1 Qe3 46.Kh1 Qf3 47.Kg1 Qe3 48.Kh1 Qf3 49.Kg1 Qe3=) 41...Qd1 (41...Qe5 42.fe5 a5+-) 42.Rg8 Kh5 (42...Kh6 43.Qe6 Kh5 44.Rg5) 43.Rg5 Kh6 44.Qg7 (44.Qe6) 1–0. Garcia Roman,J (2000) – Ladron de Guevara Bravo,F (1695), XIII Open, Malaga ESP, 2010.

6.a4 Bb4 7.Be2 0-0 8.0-0 Ba5 (8...Qe7 9.Ne5+=) 9.c4 (9.Ba3 Re8+=) 9...Nbd7 (9...c5 10.d4 Nbd7 11.cd5 Nd5 12.Qc2+=) 10.Nd4 (10.d4 Ne4+=) 10...Nb8 (10...Ne5 11.cd5 Qd5 12.f4+=) 11.cd5 (11.Qc2 e5 12.Nf5 Ne4+=) 11...cd5 (11...Nd5 12.Nc3=) 12.f4 Bc7 (12...a6 13.Qc2+=) 13.Qc2 Ne4 (13...Bd6 14.Nc3+=) 14.Nc3 Bd7 (14...Bb6 15.Ne4 fe4 16.d3+-) 15.Ne4 de4 (15...fe4 16.d3 ed3 17.Bd3+-) 16.Bc4 a6 (16...Rf6 17.d3 ed3 18.Qd3+-) 17.Ne6 (17.Be6 Kh8+-) 17...Be6 18.Be6 Kh8 19.Rfc1 Ba5 20.Qc8 Bd2?? (20...Qc8 21.Rc8 Rc8 22.Bc8 Bd2+-) 21.Rc7 Qc8 (21...Be3 22.Kh1 Nd7 23.Rd7 Qd7 (23...Rc8?? 24.Bg7) 24.Qd7 Rg8+-) 22.Bg7 (22.Rc8?! Rc8 23.Bc8 Be3 24.Kf1 Bf4+=; 22.Bc8?! Be3 23.Kf1 Nd7 24.Bd7 Rf7+-) 1–0. DEFFM – GuestFRVQ, freechess.org, 2018.

6.a4 cb5 7.ab5 a6 8.c4 b6 (8...Bd6 9.d4+=) 9.Be2 (9.cd5 Qd5 10.ba6 Na6 11.Bf6 gf6+/-) 9...dc4 (9...Bd6 10.0-0 0-0 11.d4=) 10.Bc4+= Ne4 11.Be2 (11.Ne5!? Qg5 12.Qf3+/-) 11...Bd6 12.0-0 0-0 13.Be5 Be5 14.Ne5 Qf6 (14...Bb7 15.d4+=) 15.f4 (better 15.d4+/-) 15...Bd7? (better 15...Bb7!?+=) 16.ba6 (16.Ra6 Na6 17.Nd7 Qd8 18.Nf8 Nc7+-) 16...Rd8 (16...Bc8!?+/-) 17.d4+- Bc6? (17...Ra7 18.Qb3 b5 19.Bb5+-) 18.Qc2 (better 18.a7 Bd5 19.Bb5+- (19.ab8B Ra1 20.Bc7 Rc8 21.Bb6 Qe7+/-)) 18...Qh4?? (better 18...Bb7 19.a7 Nd7+-) 19.a7 (19.Nc6 Nc6 20.Qc6 Qe7+-) 19...Nd7 (19...Bd5 20.Qc7 Nd7 21.Nd7 Qe7+-) 20.Qc6 Ne5 21.Qe6 (better 21.de5 Qe7+-) 21...Nf7 22.Qf5 (better 22.Bb5 Rd6 23.Qf5+-) 22...Ng3 (22...Qe7+-) 23.hg3 Qg3 (23...Qe7 24.Bf3 Ra7 25.Ra7 Qa7 26.Bd5+-) 24.Bc4 (better 24.Bf3+-) 24...Qe3 25.Kh1 Qe7 26.Bf7 Kh8 (26...Qf7 27.Qf7 Kf7 28.Nc3 Rd4 29.Nb5+-) 27.Be6 (27.Bd5 g6 28.Qe6 Qe6 29.Be6 Rd6+-) 27...Qh4 (27...Rf8 28.Qe5 Ra7 29.Ra7 Qa7 30.Rc1+-) 28.Kg1 Rf8 (28...Qe7 29.Bd5 g6 30.Qe6 Qe6 31.Be6+-) 29.Qh3 (better 29.Qf8! Rf8 30.a8Q Qf6+-) 29...Qd8 30.d5 h6 (30...Qc7 31.Qc3 Ra7 32.d6+-) 31.Nc3 b5 (31...Qe7 32.d6! Qd6 33.Bd5+-) 32.Ne4 (better 32.Qe3 b4 33.Ne4 Qe7+-) 32...Qb6 33.Kh1 Ra7 34.Ng5 Rf4 (34...Ra1 35.Ra1 Qd4 36.Nf7 Kh7 37.Qf5 g6 38.Qe5 Qe5 39.fe5+-) 35.Rf4 (35.g4 Qf2 36.Rf2 Ra1 37.Kg2 Rf2 38.Kf2 Ra2 39.Ke1 Ra8 40.Qd3 Ra1 41.Kd2 Ra2 42.Kc1 Ra1 43.Kb2 Rb1 44.Kb1 hg5 45.Qh3) 35...Ra1 36.Kh2 Qc7 (36...Qg1 37.Kg3 Qe3 38.Kg4 Qh3 39.Nh3 Ra8+-) 37.Nf7 (37.Qf5 Rh1 38.Kh1 Qc1 39.Kh2 Qf4 40.Qf4 hg5 41.Qg5 b4 42.Qh4) 37...Kh7+- 38.d6 Qb8 39.Qf5 g6 40.Qf6 (40.Ng5 hg5 41.Qh3 Kg7 42.Rf7 Kg8 43.Qh7) 40...Re1 (40...Qe8 41.Rh4 Rh1 42.Kh1 h5 43.Rh5 gh5 44.Ng5) 41.Rh4 g5 (41...Qd6 42.Nd6 Rh1 43.Kh1 h5 44.Nf5 gf5 45.Rh5) 42.Qh6 (42.Ng5) 42...Kg8 43.Ne5 (43.Qh8) 1-0. Delaza62 (1690) – kenedy, Rated Classical game, lichess.org, 2013.

6.a4 cb5 7.ab5 b6 8.c4 Bb7 9.cd5 Nd5 10.Ne5 Nd7? (better 10...Qg5!?=) 11.Qh5+- g6 12.Ng6 hg6?? (better 12...N7f6 13.Qh4 Rg8 14.Nf8 Rf8+-) 13.Qg6+- (13.Qh8?! Qe7+-) 13...Ke7 14.Bh8 Kd6 (14...Qe8 15.Qg5 Kd6 16.Bb2+-) 15.h4 Ne7 (15...Be7 16.Bb2 Nc5 17.d4+-) 16.Qg3 e5 17.d4 (17.d4 Qe8 18.de5 Ke6 19.Nc3+-) 1–0. Adlai – Stverty, internet, 2021.

6.a4 c5 7.Nh4 Be7 8.Bf6?? (better 8.Be2=) 8...Bf6-+ (8...gf6?! 9.Qh5 Kd7 10.Nf3=) 9.Qh5 Kd7 10.g3 (10.Qf7 Qe7 11.Qe7 Ke7 12.Nf5 ef5 13.c3-+) 10...Ba1 11.c3 Bb2 (11...Kd6 12.Be2-+) 12.Be2 (12.d4 Ba1-+) 12...d4 (12...Kc7!? 13.d4-+) 13.ed4 cd4 14.0-0 dc3 15.dc3 Qf6 16.Rd1 Ke7 17.Qf3 g6 (17...Rd8 18.Rd8 Kd8 19.Qd3 Nd7 20.Nf3-+) 18.Ng2?? (better 18.Qf4-+) 18...Nd7 (better 18...Rd8 19.Qe3 Kf7 20.Rd8 Qd8 21.Nf4-+) 19.Qd3 Ne5 (better 19...Ke8!? 20.Qc2 Ba1 21.Rc1-+) 20.Qd6 Kf7 21.Qc7 (better 21.Qb4-+) 21...Nd7! 22.Nf4 (22.Rd7 Bd7 Combination) 22...Rd8 (better 22...Qd8 23.Qc4 Re8-+) 23.Rd2?? (better 23.Ne6 Re8 24.Bc4-/+) 23...Bc1-+ 24.Rd6 (24.Ne6 Re8 (24...Qe6?! 25.Bc4 Bd2 26.Be6 Ke6 27.Qd8=) 25.Rd7 Bd7 26.Qd7 Re7 27.Nd8 Kg7-+) 24...Bf4 25.gf4 b6 (better 25...Ke8!? 26.Na3-+) 26.Bc4 Qh4 27.Re6 Kg7 28.Nd2 Qg5 (better 28...Kh6 29.Nf3 Qg4 30.Kf1 Nf8 (30...Qf3 31.Qd8 Qf4 32.Bd5-+) 31.Qd8 Be6 (31...Ne6?! 32.Be6 Qf4 33.Bc8 Qc4 34.Kg2 Rc8 35.Qd2 f4 36.Qd7-+) 32.Qa8 Bc4 33.Ke1 Ne6-+) 29.fg5 (29.fg5 Ba6 30.Re7 Kh8 31.Qd6 Rf8 32.Rd7 Rf7 33.Qe5 Kg8 34.Bf7 Kf8 35.Qh8) 1–0. alessandrocarvalhaes (1750) – seyed111 (1950), lichess.org, 2018.

6.a4 Bd6 7.Be2 0-0 8.0-0 Nbd7 9.d4 Ne4 10.c4 Kh8 (10...dc4 11.Bc4 Nb6 12.Bd3+=) 11.c5 Bc7 12.Nbd2 Ndf6 13.Ne4 fe4 14.Ne5 Be5 15.de5 Nd7 16.Qc2 Qg5 17.Bd4 Ne5? (better 17...Rf5+=) 18.h4!+- Qf5 (18...Qh4 19.Be5 Deflection) 19.Qb2 Nf3 20.Bf3 ef3 21.Bg7 Kg8 22.Bf8 Qf8 23.gf3 Qf3 24.Kh2 Kf7 25.Qe5 Qf5 26.Qc7 Ke8 27.Rg1 (27.bc6?! e5 28.Qg7 bc6 29.Qg8 Ke7+-) 27...Qf7 28.Qe5 Qf6 (28...Bd7 29.Rg7 Qf2 30.Kh1 h6 31.bc6 bc6 32.Rg8 Ke7 33.Qg7 Qf7 34.Qf7 Kf7 35.Ra8 Kg6 36.Ra7 Bc8+-) 29.Qf6 (29.Qf6 cb5 30.Rg7 ba4 31.Qe7) 1–0. onur604 (2320) – ruben1951 (1980), lichess.org, 2020.

6.a4 Bd6 7.Be2 0-0 8.0-0 Nbd7 9.Nd4 cb5?? (better 9...Nb8=) 10.Ne6+- (10.Bb5?! Nb6=; 10.ab5?! Nb6=) 10...Qe7 11.Nf8 Nf8 12.ab5 Bd7 (12...a6 13.Nc3+-) 13.Nc3 (better 13.Bd4 Bc5 14.Bc5 Qc5+-) 13...Ne4 (13...Ng6+-) 14.Nd5 Qh4 15.f4 Ne6 (15...Qd8 16.d3 Nc5 17.c4+-) 16.d3 N4g5 (16...N4c5 17.d4 Ne4 18.Nb6+-) 17.Nb6! (17.fg5?? Qh2 18.Kf2 Bg3 19.Kf3 Ng5) 17...Be8 (17...ab6 18.Ra8 Pinning (18.Ra8 Deflection)) 18.Na8 (18.fg5?? Qh2 19.Kf2 Bg3 20.Kf3 Ng5) 18...Nh3 (18...Bb5 19.Qe1 (19.fg5?? Qh2 20.Kf2 Bg3 21.Kf3 Ng5) 19...Qh6 20.Ra7+- (20.fg5 Qh2 21.Kf2 Bg3 22.Kf3 Ng5)) 19.gh3 Qh3 (19...Bb5 20.d4 Be2 21.Qe2+-) 20.Rf3 Qh6 21.d4 (better 21.c4 a6 22.ba6 ba6+-) 21...Bh5 22.Rh3 Be2 23.Rh6 Bd1 24.Re6 (24.Re6 Bf8 25.Rd1+-) 1–0. DEFFM – GuestTanos, freechess.org, 2018.

6.a4 Bd7 7.c4 a6 8.Nc3 cb5 9.ab5 Bb4 10.Qb3 Bc3 11.Bc3 0-0 12.Be2 Ne4 (12...Qb6 13.Bd4 Qc7 14.0-0+-) 13.Bb4 (13.cd5 Re8+-) 13...Rf7? (better 13...Qf6 14.d4 dc4 15.Bc4 ab5 16.Ra8 bc4+-) 14.d3?? (14.cd5 Qf6 15.d4 ed5+-) 14...Nf6?? (better 14...dc4 15.dc4 Be8+/-) 15.Ne5+- dc4 (15...Be8 16.Nf7 Bf7 17.c5+-) 16.dc4 (16.Nf7 Kf7 (16...cb3?? 17.Nd8 Bb5 18.Ne6+-) 17.dc4 Be8+-) 16...Ne4 (16...Be8 17.Nf7 Bf7 18.0-0+-) 17.Nf7 Kf7 18.0-0 a5 (18...Qc7 19.f3 Nc5 20.Qa3+-) 19.Ba3 (better 19.f3 Nf6 20.e4 Be8+-) 19...Nd2 20.Qc3 (20.Qd3 Nf1 21.Rf1 a4+-) 20...Nf1 21.Bf1 (21.Rf1!? Qf6 22.Qd2 Bc8+-) 21...Qf6 22.Qc1 b6? (better 22...e5!?+/-) 23.Bb2+- Qg6? (23...Qe7 24.Qc3 e5 25.Rd1+-) 24.Bd4 White prepares c5 (24.Qd1 a4+-) 24...Bc8? (24...e5 25.Be5 Be6+-) 25.Bb6 (25.c5 Nd7 26.cb6 e5+-) 25...Bb7 (25...a4 26.Bd4 e5 27.Be5+-) 26.c5 Nd7 (26...Bd5 27.c6 Nc6 28.bc6+-) 27.Bc7 White intends b6 (better 27.c6 Bc6 28.Qc6 Nb6 29.Qb6+-) 27...Nf6 (27...Rc8 28.Bd6 Bd5 29.Ra5 Kg8+-) 28.c6 Bc8 (28...Bc6 29.Qc6 Rh8 30.b6+-) 29.b6 Ng4 (29...Nd5 30.b7 Nc7 31.ba8R Na8+-) 30.b7 Bb7 31.cb7 (31.cb7 Re8 32.Bd8+-) 1-0. Mettigel (2330) - Iapetus (1915), Rated Blitz game, lichess.org, 2015.

6.a4 Nbd7 7.c4 Bb4 8.Be2 0-0 9.0-0 Bd6 (9...dc4 10.Na3=) 10.d4+= Ne4 11.Nbd2 Qe8 12.Rc1 Ndf6 13.a5 (13.Ne5 cb5 14.ab5 Nd2 15.Qd2 Ne4+=) 13...Kh8 (better is 13...cb5!? 14.c5 Bc7+=) 14.Ne4 Ne4 15.Ne5 Be5 (15...Bd7 16.f3 Ng5 17.bc6 Bc6 18.Qe1+=) 16.de5+/– Bd7 17.f3 Ng5 18.Ba3 Rg8 19.a6 b6 20.cd5 cd5 (20...ed5 21.bc6 Bc6 22.Qd3+/–) 21.Qb3 Nf7 22.Bb2 Rc8 23.e4 1–0. Msmsk – Ignomonius, playchess.de, 2001.

6.a4 Nbd7 7.c4 Bd6 8.Nd4 Ne5 9.f4 Nc4 10.Bc4 dc4 11.bc6 Qe7 (11...bc6 12.Nc6 Qb6 13.Bf6 Qc6 14.Bg7 Qg2 15.Qh5 Kd7 16.Bh8 Qh1 17.Kf2-/+) 12.0-0 (12.Na3 c3 13.dc3 e5 14.fe5 Be5+= (14...Qe5? 15.Nc4 Qc5 16.Nb5+-)) 12...0-0 (12...bc6 13.Nc6 Qd7 14.Ne5 Be5 15.Be5=) 13.Ba3 (13.Qc2 bc6 14.Qc4 Ne4+=) 13...Ne4 (13...bc6 14.Nc6 Qc7 15.Nd4=) 14.cb7 (14.Qc2 bc6 15.Nc6 Qd7 16.Bd6 Qd6 17.Qc4 Bb7+=) 14...Bb7= 15.Bd6 Qd6 16.Nb5 (16.Qe2 Bd5=+) 16...Qc5 17.d3?? (better 17.Qe2=+) 17...Qe3-+ 18.Kh1 Nf2 19.Rf2 Qf2 20.Qg1 Qf4 21.dc4 Qc4 22.Nd6 (22.Nd2 Qe2 23.Nf1 f4-+) 22...Qc6 (better 22...Bg2 23.Qg2 Qc1 24.Qg1 Qc6 25.Qg2 Qd6 26.Na3-+) 23.Nb7 Qb7 24.Nc3 Rac8 25.Nb5 Rc2 (25...Rfd8!? 26.Rb1 Qe4 27.Na7-+) 26.Nd4 Rd2 27.Ne6 Re8 28.Nc5 (28.Nd4 Qb6 29.Nf3 Qg1 30.Kg1 Rb2-+) 28...Qb2 (28...Qd5 29.Rb1 Ree2 30.Rb8 Kf7 31.Rb7 Kf6 32.Rd7 Qc5 33.Qc5 Re1 34.Qg1 Rg1 35.Kg1 Rd7 36.g3-+) 29.Rf1 (29.Rb1 Qd4 30.Qd4 Rd4 31.h3-+) 29...Ree2 30.Rf5 (30.Nd3 Rd3 31.Qa7-+) 30...Rg2 31.Qf1 (31.Qg2 Rg2 32.Rf8 Kf8 33.Ne6 Ke7 34.Nc5 Rh2 35.Kg1 Qf2) 31...Rh2 32.Kg1 Rdg2 33.Qg2 Qg2 0-1. Fuirio (1645) - Quique75 (1620), Rated Classical game, lichess.org, 2013.

6.a4 Ne4 7.Ne5 Nd7? (better 7...Nf6+=) 8.Qh5+- Ke7 10 9.Ng6! hg6 10 10.Qh8 Nef6 (Ndf6) (10...Ndf6 11.f3 Nd6 12.bc6 bc6 13.Bd3+-) 11.Be2 Qc7 (Kf7) 12.Nc3 Kf7 (Nc5) 13.0-0 g5 (Bd6) 14.h4 g4 (gxh4) 15.h5 (15.a5 Rb8 16.h5 g3+-) 15...b6 (e5) 16.bc6 Qc6 17.Bb5 Qc7 9 18.Ne2 e5 (18...Bb7 19.h6! gh6 20.Bd7+-) 19.Ng3 Bb7? (19...Rb8 20.Rac1 Nc5+-) 20.Nf5 Qc2 21.Bd7 Nd7?? (Qxb2) (better 21...Qb2 22.Rac1 Nd7+-) 22.Qh7+- Qc6 (Qxb2) (22...Qb2 23.Qg6 Kg8 24.Nh6 Kh8 25.Nf7 Kg8 26.h6 Nf6 27.Ng5 Qc2 28.h7 Nh7 29.Qe6 Kh8 30.Nf7 Kg8 31.Nh6 Kh8 32.Qg8) 23.Rac1 Nc5 (Qf6) (23...Qf6 24.Rc7 Ke6 25.Rfc1 Qf5 26.R7c6 Bc6 27.Rc6 Bd6 28.Rd6 Kd6 29.Qf5+-) 24.Be5 (24.Be5 Bc8 25.d4 Bf5 26.Qf5 Kg8 27.dc5 bc5 28.Qg4+-) 1–0. Janek – Tyzkus, internet, 2017.

6.a4 Be7 7.c4 0-0 8.Be2 Nbd7 9.0-0 Ne4 10.d3 Nef6 11.d4 Ne4 12.Nc3 g5 (12...Qa5 13.Qc2+=) 13.h3 (13.Qc2 Qa5+-) 13...h5 (13...g4 14.hg4 fg4 15.Ne1 Nc3 16.Bc3+=) 14.Nd2+- Nd2 15.Qd2 g4 16.hg4 hg4 17.Ba3 Nf6 18.Rfc1 Ne4 19.Ne4 de4 20.Qc3 Rf7 21.g3 Rh7 22.Kg2 Ba3 23.Qa3 Qe7 24.Qc3 Bd7 25.Rh1 Qg7 26.c5 Kf7 (26...Qf6 27.Rh7 Kh7 28.Rh1 Kg7 29.Bc4+-) 27.Qa5+- Rah8 (27...Kg8+-) 28.Qc7 Ke7 (28...Kg8 29.Qb7 Qf8 30.Bc4+-) 29.Qb7 Rh1 30.Rh1 Rh1 31.Kh1 Qh7 (31...Qh6 32.Kg1 e5 33.Qa7 ed4+-) 32.Kg1 cb5 (32...Qh8 33.bc6 Qc8+-) 33.c6 Kd8 34.Bb5 (34.Qd7?! Qd7 35.cd7 ba4+-) 34...Qe7 35.c7 Ke8 36.c8Q (36.c8Q Kf7 37.Bd7 Kg7 38.Be8 Qc7 39.Qcc7 Kf6 40.Qd8) 1–0. Alice1 – Mjtnjs3, internet, 2019.

6.c4 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3 c6 6.Nf3).

6.Bd3 Bd6 7.0-0 Nbd7 8.a4 (8.Nd4 Nc5 9.bc6 Nd3 10.cb7 Bh2 11.Kh2 Qc7 12.Kg1 Qb7 13.cd3 Qb2=) 8...0-0 9.Nc3 Ne4 (9...c5 10.Be2=) 10.Ne2 (10.Be2 Qc7=) 10...Ndf6 (10...e5 11.Ba3=+) 11.Nf4 (11.Be5 c5=+) 11...Bd7 (11...Qc7 12.Be2=+) 12.c4 (12.Ne5 Qc7 13.Nd7 Qd7= (13...Nd7? 14.Ne6 Qa5 15.Be4 de4 16.Bc3+-)) 12...Qe7 (12...Qc7 13.Rc1=+) 13.bc6 (13.Be5 Rac8=) 13...bc6 14.cd5 ed5 (14...cd5 15.Be5 Ng4 16.Bd6 Qd6=+) 15.Qb3 (15.Rb1 Rab8=) 15...Rab8 (15...g5!? 16.Bf6 Qf6-/+) 16.Qc2=+ g6 (better is 16...g5 17.Be4 Ne4= (< 17...Qe4 18.d3 Qe7 19.Ng5+/–; 17...fe4?! 18.Ng5 c5 19.f3=)) 17.Be4? (17.Be2 g5 18.Nd3 c5=) 17...de4 (17...fe4!? 18.Nd4 c5-/+) 18.Nd4 Be5 (18...g5 19.Nfe2=+) 19.f3 (19.Nc6 Bc6 20.Be5 Qe5 21.Qc6 Ng4+=) 19...a6 (19...c5 20.Nb5 Bb2 21.Qb2-/+) 20.fe4 (20.Ba3 Bd6 21.Qc4 Kh8 22.Bd6 Qd6 23.Qa6 g5+/–) 20...fe4 21.Qc4?? Kg7?? 22.Ba3 Bd6 23.Nfe6 Be6 24.Ne6 Kh8 25.Nf8 Qf8?? 26.Bd6 Qd6 27.Qc3 Kg7 28.Rad1 Kf7?? 29.d3 (29...Qe6 30.de4+-) 1–0. icewater – 300SPARTANS, Live Game Caissa's Web, 2005.

6.Be5 Nbd7 =.

6.a4 Nbd7 7.Be2 0-0 8.d4 Ne4 9.0-0 Rf6 10.Ne5 (10.Ba3 a6=) 10...Rh6 11.f3 Qh4 12.fe4 Qh2 13.Kf2 Ne5 14.de5 Be5 (14...Qh4!? 15.g3 Qh2 16.Ke1 Qg3 17.Kd2 Be5=+) 15.Be5+= Qe5 16.Nd2 (better 16.Qd4!? Qe4 17.Nd2+=) 16...fe4=+ (worse 16...de4 17.Nc4 Qf6 18.Rh1 Rh1 19.Qh1+=) 17.Ke1 (17.Nb3!?=+) 17...Qg3-/+ 18.Rf2 Rh1 19.Nf1 Qe3 20.Qd2?? (better 20.Qc1 Qc3 21.Kd1-/+) 20...Qg3-+ 21.Qf4 (21.Qb4 Bd7 22.Ra3 e3 23.Re3 Rf1 24.Kf1 Qe3-+) 21...Qc3 22.Kd1 Qa1 23.Kd2 Qd4 24.Bd3 (24.Ke1 Qb4 25.Kd1 Bd7-+) 24...Qb4 (24...h6 25.Qf7 Kh7 26.Rf4-+) 25.c3 Qe7 26.Be2 e5 27.Qg3 Bd7 (27...d4 28.Bc4 Be6 29.Qe5 e3 30.Ne3 de3 31.Qe3 Qd6 32.Bd3-+) 28.Ne3 (28.Ke1 a6 29.ba6 ba6-+) 28...c6 (28...Qa3 29.Rf1 d4 30.Bc4 Kh8 31.Rh1 Qc3 32.Ke2 de3 33.Rh7 Kh7 34.Qh4 Kg6 35.Qg3 Kf6 36.Qh4 g5 37.Qh6 Ke7 38.Qg5 Kd6 39.Qf6 Kc5 40.Qe7 Kc4 41.Qd7-+) 29.Bg4 (29.Nc2-+) 29...Bg4 30.Qg4 Rh4 (30...Qa3 31.Nf1 Qb2 32.Ke1 Qc3 33.Kd1 Qd3 34.Ke1-+) 31.Qg3 Rh5 32.Nf5 Qg5 (32...Qf6!? 33.Ne3 Qe6 34.Qg4 Qg4 35.Ng4 cb5 36.ab5-+) 33.Qg5 Rg5 34.bc6 bc6 35.Ne7 Kh8 36.Nc6 h6 (36...Rg3 37.Kd1-+) 37.Ne7 (37.Re2 Rc8 38.Na7 Ra8-+) 37...d4 38.Re2 e3 (38...Rb8!? 39.Kc1 e3 40.Nc6-+) 39.Kd3 Rd8 40.c4 (40.cd4 ed4 41.Rc2 Rd6-+) 40...Rd7 (better 40...e4 41.Ke4 d3 42.Ke3 Re5 43.Kf4 Re2-+) 41.Nd5 Rf5 42.a5 (42.Re1 Rf2-+) 42...Rd6 (42...Rf2 43.Re1 Rg2 44.Ra1-+) 43.Ne3 (43.Re1 Ra6-+) 43...de3 44.Ke3 h5 (44...Rf4 45.c5 Rc6 46.Rc2-+) 45.Ke4 (45.c5 Rd1 46.Rc2 Re1 47.Kd3 Rf4-+) 45...Rg5 46.Rc2 (46.c5 Rd4 47.Ke3 Rc4-+) 46...Rd4 47.Kf3 (47.Ke3 Rf4-+) 47...Rg6 (better 47...Rf4 48.Ke3 Rg3 49.Kd2 Rg2 50.Kd3 Rc2 51.Kc2-+) 48.c5 (48.g3 Rc6 49.Rh2 g6-+) 48...Rc6 (better 48...Rf4 49.Ke3 Rg3 50.Kd2 Rg2 51.Kc1 Rc2 52.Kc2-+) 49.g3 g6 50.Rc3 Kg7 0–1. Nieswandt,Joseph – Ludwig,Ines, 2rd Bayern–ch Seniors, 2010.

6.c4 dc4 7.Bc4 Nbd7 8.Ng5 Nb6 (8...Nf8 9.d3+=) 9.Be6+- (worse 9.Ne6 Qe7 10.Nc7 Bc7-+) 9...Be6 10.Ne6 Qe7 11.Qb3 Nfd5?? (better 11...a6+-) 12.Ng7+- Kd7 13.Nf5 Qf7 (13...Qg5 14.Bh8 Qg2 15.Rf1 Rh8 16.Nd6 Kd6 17.Nc3+-) 14.Nd6 cd6 15.Bh8 Rh8 16.0-0 Rg8 17.g3 Qf3 18.Nc3 h5 (18...Rg5 19.Nd5 Rd5 20.d4+-) 19.Rac1 (19.Nd5 Nd5 20.Qd1 Qd1 21.Rad1 a6+-) 19...h4 20.Nd5 Nd5 21.Qc2 h3 (21...Rh8 22.Qd1 Qf5 23.g4+-) 22.Qh7 Ne7 23.Qh3 Kd8 24.Qe6 (24.Qg2 Qd5+-) 24...Qf5 (24...Rg6 25.Qc4 Kd7+-) 25.Rc8! (25.Rc8 Nc8 26.Qf5+-) 1–0. DEFFM – CHKURMATE, freechess.org, 2017.

6.c4 c5 7.Be2 A) 7...0-0 8.0-0 f4 9.ef4 d4 10.g3 Qc7 11.Re1+=; B) 7...Nbd7 8.0-0 0-0 9.d4 cd4 10.Qd4 e5 11.Qh4=.

6.c4 Bc5 7.a3 (7.d4 Bb4 8.Bc3 Be7+=) 7...0-0 8.d4 Be7 9.c5 c6 10.a4 a5 (10...b6 11.cb6 ab6 12.Bd3=) 11.Bd3 Bd7 (11...b6 12.cb6 Bb4 13.Nbd2 Qb6 14.Ba3+=) 12.Nc3 (12.0-0 b6 13.Ba3 bc5 14.Bc5 Bc5 15.dc5 Qe7+=) 12...Ne4 13.0-0 Be8 14.Be2 (14.Ne5 Nd7 15.Nd7 Bd7+=) 14...Nd7 (14...b6 15.cb6 Qb6 16.Qc2+=) 15.Nd2 Ndf6 (15...e5 16.Nb3+=) 16.f3 (16.b6!?+=) 16...Nc3= 17.Bc3 Nh5 (17...b6 18.cb6 Qb6 19.Qb3=) 18.e4 (18.b6 f4 19.e4 e5+/-) 18...Rf6 (18...Nf4!?=) 19.e5 (19.f4 Rh6 20.bc6 bc6 21.ed5 cd5+/-) 19...Rh6+= 20.f4 g5 (20...b6 21.cb6 Qb6 22.bc6 Qc6 23.Qb3+=) 21.Bh5 (21.bc6 bc6 22.fg5 Bg5+/-) 21...Bh5+= 22.Qe1 g4 (22...cb5!? 23.fg5 Bg5 24.ab5 Bh4+=) 23.bc6+/- bc6 24.Rb1 (24.Nb3 Ra6+-) 24...Rb8 (24...Bh4!? 25.Qe3 g3+/-) 25.Rb8+- Qb8 26.Ba5 Qb2 27.Bc7?? (better 27.Qe3+-) 27...Qd4-/+ 28.Kh1 Qc5 (28...Qa4?! 29.Bd6 Bd6 30.ed6+=) 29.Qb1 (better 29.Qg3-/+) 29...Qd4?? (better 29...g3 30.h3 Be2-+) 30.Qc2?? (30.Qb8 Kg7 31.Bd6 Bd6 32.ed6+-) 30...Be8 (better 30...g3!? 31.h3 Be2 32.Nb3-+) 31.a5 (31.Bd6 Bd6 32.ed6 c5-/+) 31...c5 (31...Qe3 32.Rd1-+) 32.a6 c4 (better 32...Qe3 33.Ra1 Qf4-/+) 33.Rb1?? (33.Bd6 Bh4 34.Rd1 Qf2-+) 33...g3 (better 33...Bc5 34.Rf1 Qe3-+) 34.h3?? (34.Nf3 Qa7 35.Bd6 Bd6 36.ed6 Qa6 37.Rb8 Qa1 38.Qb1 Qb1 39.Rb1=+) 34…Qe4 (34...Rh3 35.gh3 Qf2 36.Nc4 g2 37.Kh2 g1Q). iamdudum (1790) – nossing, Rated Classical game, lichess.org, 2013.

6.c4 Nbd7 7.d4 A) 7...0-0 8.Nc3 (8.c5 Be7 9.Bd3 a6 10.Qa4 e5 11.Ne5=) 8...dc4 9.Bc4 Nb6 10.Bd3 Bd7 11.0-0+=; B) 7...c6 8.c5 Bc7 9.Qa4 cb5 10.Bb5 0-0 11.0-0+=; C) 7...dc4 8.Bc4 Nb6 9.Bd3 a6 10.ba6 ba6 11.0-0=.

6.c4 Qe7 7.Nc3 (7.d4 b6=) 7...0-0 8.Be2 (8.d4 b6=) 8...Nbd7 (8...a6 9.0-0=) 9.d4 b6 (9...dc4 10.Bc4 Nb6 11.Bd3=) 10.cd5 (10.Qc2 Bb7=) 10...ed5 (10...Nd5 11.0-0=) 11.g3 (11.Qc2 Nb8+=) 11...Bb7= 12.Qb3 h6 (12...c5 13.bc6 Bc6 14.Bd3=) 13.h4 (13.0-0 c5=) 13...Qf7 (13...c5 14.bc6 Bc6 15.Bb5=) 14.Ba3 Ba3 15.Qa3 Ne4 (15...Qe6 16.Rc1=) 16.h5 (16.Rc1 Qe6=) 16...Rfc8 (16...a6 17.ba6 c5 18.Rc1=) 17.Nh4 (17.Rc1 c5=) 17...Qe6 (17...c5 18.bc6 Rc6 19.Nd1=) 18.Ne4 (18.Ng6 Nc3 19.Qc3 c5=) 18...fe4 (worse 18...Qe4 19.Rg1 a6 20.ba6+-) 19.Ng6 Re8 20.Rc1 c5 21.bc6 (worse 21.dc5 bc5 22.Rh4 Qb6=+) 21...Bc6 22.0-0 (22.Nf4 Qf6+=) 22...Kh7 (22...Qf6 23.Kg2 a6 24.f3+-) 23.Rc2 (23.Nf4 Qf6 24.f3+-) 23...Nf6+- 24.Rfc1 (better 24.Nf4!? Qd7 25.Rfc1+-) 24...Bd7+= 25.Rc7 a5 (25...a6 26.Nf4 Qf5 27.Qd6+= (27.Ba6? Bb5-+)) 26.Nf4+- Qf5 27.Qd6 Ba4? (27...Rad8!?+-) 28.Qb6 (28.g4 Qg5 29.Ne6 Re6 30.Qe6 Re8 31.Qf5 Qf5 32.gf5 Rb8+-) 28...Reb8 (28...Bd7 29.R1c5+-) 29.Rb7 Rc8 30.Rcc7 Rc7 31.Qc7 Ne8 32.Qc5 (32.Qb6 Rc8+-) 32...Nf6 (32...Rc8 33.Qa5 (33.Qd5?! Qd5 34.Nd5 Bc6+=) 33...Rc1 34.Kg2+-) 33.Ra7 (33.Qe7 Rg8+-) 33...Rc8 (33...Ra7 34.Qa7 Qd7 35.Qa5+-) 34.Qa3 (better 34.Qe7 Nd7 35.g4+-) 34...Be8? (34...Bd7 35.Qe7 Re8 36.Qf7+-) 35.Ra5 (better 35.Qe7 Bd7 36.g4+-) 35...Bf7 36.Qb2 Rc7 (36...Rf8 37.Qb4 Kg8 38.a4+-) 37.Kg2 (37.Rc5 Ra7+-) 37...Qc8 (37...Bh5 38.Nh5 Nh5 39.g4+-) 38.Bd1 (38.Qb6 Rc6 39.Rc5 Rc5 40.Qc5 Qd7+-) 38...Rc1 39.Qd2 Qc7 (39...Ra1 40.Be2+-) 40.Rb5 (40.Bb3 Nh5 41.Nd5 Bd5 42.Rd5 Nf6+-) 40...Qc4 (better 40...Qc8+-) 41.Rc5 Rd1 42.Qd1 Qa2 43.Rc7 Be8 44.Rc2 (44.Qh1 Bd7 45.Qh4 Ng4 46.Rd7 Qf2 47.Kh3 Ne3 48.Rg7 Kg7 49.Qe7 Kg8 50.Qe8 Kg7 51.Ne6 Kf6 52.Qf8 Ke6 53.Qf2 Nc4+-) 44...Qa7 (44...Qb3 45.Rd2 Qd1 46.Rd1 Bh5 47.Nh5 Nh5 48.Rb1+-) 45.Qe2 (45.Rc5 Qa2 46.Kg1 Bd7+-) 45...Bd7 (45...Qd7 46.Rc5+-) 46.Rc5 (46.Ra2!? Qb8+-) 46...Bg4 47.Qc2 Qa1 48.Qc1 Qa2 49.Rc2 Bf3 50.Kg1 Qa8 51.Qb2 (51.Rc6 Qb7+-) 51...Qa5 (51...Bh5 52.Qa2 Qb7 53.Rc5+-) 52.Qc3 Qa8 (52...Qa4 53.Rc1 Bh5 54.Qc7+-) 53.Qc6 (better 53.Qc8 Qc8 54.Rc8 Bh5 55.Rc6+-) 53...Qa1? (better 53...Qa5 54.Rc1 Bh5 55.Nh5 Nh5+-) 54.Rc1 Qa3 55.Qc3 (better 55.Nd5!? Nh5 56.Qc8 Qd6 57.Qf5 Qg6 58.Qg6 Kg6 59.Ne7 Kf6+-) 55...Qa8 56.Ne6 (56.Qc8 Qc8 57.Rc8 Bh5+-) 56...Bh5? (56...Qe8!? 57.Qc8 Qh5 58.Nf8 Kg8 59.Ng6 Kh7+-) 57.Qc8 (57.Qc7 Ne8 58.Qe7 Bg4+-) 57...Qc8 58.Rc8 Bg4 (58...g5 59.Rc6 Be8 60.Rc7 Kg6 61.Nf8 Kh5 62.Rb7+-) 59.Rc6 (59.Nf8 Kg8 60.Nd7 Kf7 61.Ne5 Ke7 62.Ng4 Ng4 63.Rc7 Kf8+-) 59...Kg8 (59...Be6 60.Re6 Kg6 61.Re7+-) 60.Nc7 (60.Nf4 Bd1+-) 60...Kf7 61.Rc5 Be6 62.Na6 (62.Ra5 Ke7+-) 62...Kg6 (62...g5 63.Ra5+-) 63.Nb4 h5 (63...Kf5 64.Nc6+-) 64.Nc6 (64.Rc7 Ng8+-) 64...Kh6 (64...Kf5 65.Ne7 Kg4 66.Rc7+-) 65.Ne5 Bg8 (65...Kg5 66.Rc7 g6 67.Re7+-) 66.Rc6 Kg5 67.Kg2 (67.Rc7 Kh6+-) 67...Kh6 (67...Kf5 68.Ra6+-) 68.Kh3 (68.Kf1 Kg5+-) 68...Bh7 69.g4 Kg5?? (69...hg4 70.Ng4 Kg5 71.Nf6 gf6 72.Kg3+-) 70.gh5 (better 70.f4 ef3 71.Nf3 Kg6 72.g5+-) 70...Bf5 71.Kg2 Kh5 72.Rd6 (better 72.Kg3+-) 72...Bh7? (better 72...Kg5+-) 73.Nd7 Nd7 (73...Kg6 74.Nf6 gf6 75.Rd5+-) 74.Rd7 Kg6 75.Rd5 Kf6 76.Re5 Bg6 (76...g5 77.f3 ef3 78.Kf3+-) 77.Kg3 (better 77.f3 ef3 78.Kf3 Bd3+-) 77...Bh7 (77...Bf5+-) 78.Kf4 Bg6 79.Re4 (79.d5!? Bf7+-) 79...Be4 (79...Bf5+-) 80.Ke4 1–0. Krafzik,Joachim (2060) – Fries,Karl Heinz (1870), Chiemgau Seniors–Cup 1st, 2005.

6.d4 0-0 7.c4 a6 8.Qb3 b6 9.Nc3 ab5 10.Nb5 =.

6.d4 0-0 7.Bd3 a6=+ 8.c4 dc4 9.Bc4 ab5 10.Bb5 c6 (10...Bd7 11.Bc4=) 11.Bd3 Na6 (11...b6 12.Qb3 Nd5 13.Ba3=) 12.a3 Nc7 (12...b6 13.0-0=) 13.Nc3 (13.Qc2 Ncd5=) 13...Ncd5 (13...b6 14.e4 Nd7 15.0-0=) 14.0-0 Ng4 (14...f4 15.Qe1=) 15.h3 (15.Qb3 Qc7 16.h3 Nh2 17.Nh2 Bh2 18.Kh1 Bd6=) 15...Ngf6 (15...Nge3 16.fe3 Ne3 17.Qb3 Nf1 18.Rf1=) 16.Nd5 (16.Qb3 Qe7=) 16...cd5 (16...ed5 17.Qc2=) 17.Qb3 (17.Ne5 Nd7=) 17...Ne4 18.a4 Rf6 (18...b6 19.Ba3=) 19.Ba3+= Bb8 20.Be4 (20.Rfc1!?+=) 20...fe4= (worse 20...de4 21.Ne5+=) 21.Nd2 (21.Ne5 Rf5=+) 21...Qc7 (21...Rf7 22.f3 Qc7 23.f4=+) 22.g3 (22.f4 Bd7=) 22...Rg6 (22...Qd8 23.Bc5-/+) 23.Rfc1= Qd7 The isolani on a4 becomes a target (23...Qd8 24.Rab1=) 24.Nf1 (24.Qb5 Qd8=) 24...e5 (24...Rf6 25.Qc2 Bd6 26.Bd6 Qd6 27.Qc5=+) 25.Rc8 (better 25.Rc5!? Qe8 26.Rd5+=) 25...Qc8=+ 26.Qd5 Kh8 27.Kg2 (27.Bc5 Ra5 28.Qe4 b5=+ (28...Qh3?? 29.Qb7 Bc7 30.Bb6+-)) 27...ed4 (27...Rh6 28.h4-/+) 28.Qd4 Re6 29.Rc1 (29.Rb1 Ba7 30.Qd5 Bb6-/+) 29...Qe8 30.Qd5 Ra7 (30...Ra4 31.Qb7 Ra7 32.Qb3-/+) 31.Rc4 (31.Bb2 Re7-/+ (worse 31...Ra4 32.Qg5 Rg6 33.Qe7+-)) 31...h6 (31...Re5!? 32.Qd1 b5-/+) 32.Bb2=+ b6 33.Rd4 (33.Qb5=+) 33...Qf7 (better 33...Qg6!?=+) 34.Re4= Rae7 (34...Re4 35.Qe4 Re7 36.Qb4=) 35.Rg4 (35.Re6 Re6 36.f4 Qe7+=) 35...Qe8= 36.Qb3 (36.Qb5 Qd8=) 36...h5 (36...Be5 37.Be5 Qc6 38.f3 Re5 39.Rd4=) 37.Rg5 (37.Rc4+=) 37...Rh6 (37...Be5!?+=) 38.Qb5+- Qb5 39.ab5 Kg8 (39...Bd6 40.e4 Bc5 41.f4+-) 40.Nd2 (40.e4 g6 41.Rd5 Kf7+-) 40...h4 41.gh4 (41.Bd4 Rd7+-) 41...Rh4 42.Nf3 Rh6 (better 42...Rh7!?+-) 43.Nd4+- Rf7 (43...Rd7 44.Nf5 Rh7 45.Rg6+-) 44.Nf5 Rh7 45.e4 Kf8 46.Rg6 Bc7 47.Bd4 Rd7 48.Bb6 Bb6 (48...Kf7 49.Rc6 Bb6 50.Rb6+-) 49.Rb6 Rd3 (49...Rh5 50.Rg6+-) 50.f3 (50.f4 Rd2 51.Kg3 Rd3 52.Kg4 Rd1+-) 50...Rd2 (50...Ke8 51.Re6 Kd8 52.Rg6 Rd2 53.Kg3+-) 51.Kg3 Rd1 52.e5 (better 52.Kf4+-) 52...Re1 (52...g6 53.Rb8 Kf7 54.Rb7 Ke6 55.Rh7 Kf5+-) 53.e6 Re6 54.Re6 (54.Re6 Kf7 55.Rb6+-) 1–0. Phildo (1865) – Doconnie (1670), gameknot.com, 2013.

6.d4 Nbd7 7.c4 c6 8.c5 Bc7 9.Nc3 Ne4 10.Rc1 0-0 11.Bd3 Rf6 12.Ne2 Rh6 13.g3 (13.Qa4 cb5 14.Qb5 Ng5=) 13...Qf6 (13...cb5 14.Bb5 Bg3 15.fg3 Qa5 16.Nc3 Nc3 17.Bc3 Qb5 18.Qe2-/+) 14.Rc2 g5 15.Qa1 Rh3 16.Nfg1 Rh5 17.f4 (17.Qd1 Ba5 18.Kf1 g4=) 17...gf4 (17...cb5 18.Bb5 Ba5 19.Kf1+=) 18.ef4 (18.gf4 Qh4 19.Ng3 Ng3+=) 18...Qg6 19.Qc1 Ndf6 20.Nf3 Ng4 21.Be4 fe4 22.Nh4 Qf6 23.Rc3? (23.h3 Nh6=) 23...Bd7 (better is 23...Ba5!?-/+) 24.h3= Nh6 25.Ng2 (better is 25.bc6 Bc6 26.Rb3=) 25...Nf7?? (better is 25...Ba5-/+) 26.g4+- Ba5 27.gh5 cb5 28.Qe3 Rc8 29.Kd1 Bc3 30.Bc3 Nh6 31.Rg1 Kf7 32.Ba5 Nf5 33.Qd2 Qh6 34.Ne3 Qh5 35.Nf5 ef5 36.Qe3 Rc6 (36...Qf3 37.Qf3 ef3 38.Nc1+-) 37.Rg5 (37.Qb3 Qh6+-) 37...Qh6 (better is 37...Qf3!? 38.Qb3 Qb3 39.ab3 Ra6+/–) 38.Nc3 Ra6 39.Bb4 ½–½. Zimmermann,Joerg – Brockmann,Werner, Kiel op–B, 2003. (=1.Nf3 d5 2.b4 e6 3.b5 f5 4.Bb2 Nf6 5.e3 Bd6)

6.Be2 a6 7.Nc3 0-0 8.ba6 ba6 9.Rb1 e5 10.0-0 +=.

6.Be2 a6 7.Nc3 ab5 8.Nb5 0-0 9.Nd6 Qd6 10.0-0 Nbd7 11.Nd4 c5 (11...b6 12.a4 Ba6 13.d3+=) 12.Nb5+= Qb6 13.a4 c4 (13...Qc6!?+=) 14.d3+- Nc5 15.dc4 Na4 (15...dc4!? 16.Bc4 Bd7+-) 16.Bf6 Rf6 (16...gf6 17.cd5 Bd7 18.Rb1+-) 17.c3 Bd7? (17...Qa5 18.cd5 Bd7+-) 18.Ra4 Ra4 19.Qa4 dc4 (19...f4 20.ef4 Rf4 21.g3 Bb5 22.Qb5 Qb5 23.cb5+-) 20.Qc4 f4 (20...Bb5 21.Qb5 Qb5 22.Bb5+-) 21.ef4 Rf5 (21...Bb5 22.Qb5 Qb5 23.Bb5 Rf4 24.Re1+-) 22.Rb1 g5 (22...Rd5 23.Rb4 Bb5 24.Rb5 Rb5 25.Qc8 Kf7 26.Qd7 Kf8 27.Bb5+-) 23.Qd4 Qa5 (23...Qd4 24.Nd4 Rc5 25.fg5 e5+-) 24.Qd7 Rf7 25.Qe6 Qa2 (25...Qb6 26.Qb6 Rf4 27.Qd8 Kg7 28.Qg5 Kh8 29.Qf4 Kg7 30.Qg5 Kf8 31.Qf6 Ke8 32.Rd1 h6 33.Bh5) 26.Qa2 Kg7 (26...Kf8 27.Nd6 Re7 28.Qa8 Kg7 29.Rb7 gf4 30.Re7 Kf6 31.Qf8 Kg5 32.Rh7 f3 33.Qf5) 27.Nd6 Rf6 (27...Rc7 28.Qe6 h5 29.Nf5 Kh7 30.Qh6 Kg8 31.Bc4 Rf7 32.Qg7) 28.Rb7 Kg6 (28...Kh6 29.Qg8 Rd6 30.Qg5) 29.Qg8 Kh6 30.Qg5 (30.Qh7?!=; 30.Rh7?!=; 30.fg5?!=) 1–0. Pierre – Roccho, internet, 2019.

6.Be2 c5 7.0-0 0-0 8.c4 Nbd7 (8...Qe7 9.cd5 ed5 10.Nc3 Be6 11.Qb3 Nbd7) 9.d4 Nb6 (9...b6 10.Nc3 Bb7 11.cd5 ed5) 10.Nbd2 Ne4 (10...Bd7 11.Rc1 (11.Ne5 Rc8) 11...Rc8 12.dc5 Bc5 13.Qb3=; 10...Qe7 11.Rc1 Bd7) 11.Rc1+= cd4 (11...Qe7+=) 12.Bd4 Ba3 13.Rc2 Qe7 14.Ne5 Bb4 (14...Bc5 15.h3+-) 15.Ne4 fe4 16.h3 Nd7 (16...Qg5 17.c5 Nd7 18.f4 ef3 19.Nf3+-) 17.cd5+- ed5 18.Nd7 Bd7 (18...Qd7 19.Bc5 Bc5 20.Rc5+-) 19.Rc7+- b6?? (better 19...Qd6 20.Rb7 Rfb8 21.Rb8 Rb8+-) 20.Bg4 Rfd8 (20...Rad8 21.Qb3 Bd6 22.Qd5 Rf7 23.Ra7 Bb8 24.Bb6 Ba7 25.Bd8 Qc5 26.Qc5 Bc5+-) 21.Qb3 Bg4 (21...Qd6 22.Rd7 Rd7 23.Bd7 Qd7 24.Qb4 Rc8+-) 22.Re7 Be7 23.hg4 Rac8 24.Rd1 Rc4 (24...Rc7+-) 25.Bb6! ab6 (25...Rb4 26.Qb4! Bb4 27.Bd8+-) 26.Rd5! (26.Rd5 Rdc8 27.Rd4+-) 1–0. Pierre – Danziger, internet, 2020.

6.Be2 c5 7.Nc3 0-0 8.0-0 Nbd7 9.a4 Qa5 10.Qe1 Re8 11.d3 Qc7.

6.Be2 c5 7.c4 b6 8.cd5 ed5 9.Ng5 (9.0-0 0-0=) 9...0-0 10.Bf3 Ne4 (10...Bc7 11.d3 f4 12.Qb3=) 11.Nh3 (11.Be4 fe4 12.Qh5 h6 13.Ne4 Bc7+=) 11...Bb7 12.d3 Nf6 13.0-0 (13.Qb3 Kh8=) 13...Nbd7 14.Qb3 (14.Nc3 Qc7=) 14...Ne5 15.Ng5 Nf3 16.Nf3 Kh8 17.Nbd2 Qe7 18.Rfe1 Be5?? (better 18...a6=+) 19.Ne5+- Qe5 (19...a6+-) 20.Be5 Ne4 (20...a6 21.ba6 Ra6 22.Qb5+-) 21.Ne4 (better 21.de4 fe4 22.f3 ef3 23.Nf3 Rf7+-) 21...Bc6 (21...fe4 22.de4 Rae8+-) 22.Qb2 1–0. GuestMVZK – GuestLGCL, freechess.org, 2018.

6.Be2 c5 7.h3 0-0 8.0-0 Nbd7 9.c4 Qc7 10.Nc3 Nb6 11.cd5 ed5.

6.Be2 c6 7.a4 0-0 8.0-0 c5 (8...Qc7 9.d4 Nbd7 10.Nbd2=) 9.c4 (9.d4 Nbd7 10.c4=) 9...b6 (9...Qc7 10.d4+=) 10.d4 Bb7 11.Nc3 Nbd7 12.cd5 ed5 13.Qb3 c4 14.Qc2 Ne4 15.Nd2 Ndf6 16.Nde4 Ne4 17.Ne4 fe4 18.f3 (18.Ba3 Ba3 19.Ra3 a6 20.ba6 Ra6+=) 18...Qh4 19.f4 Bc8 (19...a6 20.ba6 Ra6 21.Rfb1-/+) 20.Rf2 (20.Bc4 Be6 (20...dc4? 21.Qc4 Rf7 22.Qd5+-) 21.Bb3 Rac8+=) 20...g5 (20...Bg4 21.Bg4 Qg4 22.a5-/+) 21.g3 (21.Bc4!? Be6 22.g3+=) 21...Qh6+= 22.Kf1 (22.Ba3!? Ba3 23.Ra3 gf4 24.gf4-/+) 22...Bh3 23.Ke1 gf4 24.ef4 Bf4?? (24...Rae8 25.Qc3 e3-+) 25.gf4+- (25.Rf4?! Rf4 26.gf4 Qf4+=) 25...Rf4? (better is 25...Kh8+-) 26.Bc1 Raf8 27.Bf4 (27.Rf4 Rf4 28.Ra3 e3 29.Re3 Qh4 30.Rg3 Rg4 31.Bg4 Bg4+-) 27...Rf4 28.Qd2 (28.Qd2 Rf6 29.Qh6 Rh6 30.Ra3+-) 1–0. Trkn – Oscartje, itsyourturn.com, 2000.

6.Be2 c6 7.a4 0-0 8.c4 Qe8 (8...dc4 9.Bc4 Nd5 10.0-0=) 9.Qb3 (9.d4 dc4 10.Bc4 Bd7=) 9...e5 10.Nc3 (10.d4 e4 11.Ne5 Qe6=) 10...e4+= 11.Nd4 c5 12.Nc2 dc4 13.Bc4 Kh8 14.f4 (14.a5 Qg6 15.g3 Nbd7+=) 14...ef3+= 15.gf3 Nbd7 16.0-0-0 (16.Nd5 Nd5 17.Bd5 f4+=) 16...Nb6-/+ 17.Rhg1 (17.Nd5 Nc4 18.Qc4 Nh5+=) 17...Nc4 18.Qc4 Rf7 (18...Be6 19.Qh4-/+) 19.Qh4 Be7 (19...Be6 20.d4-/+) 20.Qf2 (20.Qg3 Be6+=) 20...Be6 21.Rg2 Nd7 (21...Rd8 22.Rdg1-/+) 22.d4 Bb3 23.Rdg1 Bf6 24.Qd2 (24.d5 a6-/+) 24...Nb6 (24...a6-/+) 25.Na3? (better is 25.dc5!? Nc4 26.Qe2-/+) 25...cd4-+ 26.ed4 Rc8 27.Kb1 (27.a5 Nd5 28.Kb1 Rfc7 29.Nd5 Bd5-+) 27...Nd5 (27...Rd7 28.d5 Qf8 29.Qd3 Bc3 30.Bc3 Qa3 31.Bg7 Rg7 32.Qd4-+) 28.Nd5 Bd5 29.Qd3 (29.Qf4 Re7-+) 29...Qd7 30.Rc2 Rc2 31.Nc2 g6 (31...Be5 32.h3-/+) 32.Nb4-/+ Qe6 33.Rc1 Kg7 34.Nd5 Qd5 Attacking the isolated pawn on d4 35.Rc5 Qd6 36.Rc2 Rc7 (36...Rd7 37.Qe3-/+) 37.Ba3 (37.Qa3!? Qd7 38.Rc7 Qc7 39.d5=) 37...Qd7+= 38.d5 Rc2 39.Kc2 Qc7 40.Kb3 Qd7 (40...h6 41.Bb2 Bb2 42.Kb2 Qh2 43.Kb3+=) 41.Qc4 (41.Bb2 Qd6 42.Bf6 Kf6 43.Qd4 Kf7+=) 41...Be5 (41...Kh6 42.Bb2 Be7 43.Bd4=) 42.f4 (42.Qc5 Kf6+=) 42...Bf6 (42...Bc7!?+=) 43.a5 Qe8 (43...Qd8 44.Bb2 Bb2 45.Kb2 Qa5 46.Kb3+=) 44.Qc5 (44.Bc5 Qd8 45.Bd4 Bd4 46.Qd4 Kh6+/–) 44...Kh6 (better is 44...Kg8!?=) 45.Qf8+/– Qf8 46.Bf8 Kh5 47.d6 g5 48.Be7 (48.fg5!? Kg5 49.d7+/–) 48...Kg6= 49.fg5 Kg5 (49...Be7!? 50.de7 Kf7=) 50.Kc4+/– Kg6 51.Bf6 Kf6 52.Kd5 f4 53.a6 (better is 53.Ke4+/–) 53...ba6-+ 54.Kc6 ab5 55.d7 Ke5 (55...Ke7 56.Kc7 f3+-) 56.d8Q Ke4 (56...a6 57.Qb6 b4 58.Qa6+-) 57.Qd2 (57.Qd2 h6 58.Qd5 Ke3 59.Qe5 Kf3 60.Qh5 Ke3 61.Kb5+-; 57.Kb5 h6+-) 1–0. Valles,A – Fabre,JM, Aragon ch, 1991.

6.Be2 Nbd7 7.0-0 0-0 8.c4 c6 9.Nd4 Nb8 10.cd5 ed5 11.Qc2 f4 (11...a6 12.b6+=) 12.ef4 c5 (12...Re8 13.bc6 Nc6 14.Nc6 bc6 15.Qc6+-) 13.Nf3 b6 (13...Bf4!? 14.Qc5 Nbd7+-) 14.g3+- Bb7 (14...a6 15.Ng5 g6 16.Bf3+-) 15.Ng5 Nbd7 (15...Qd7 16.Re1 Re8 17.Na3+-) 16.Nc3 Qe7 (16...Re8 17.Bf3 g6 18.Nd5 Nd5+-) 17.Rae1 h6 (17...Qd8 18.Bf3 h6 19.Ne6+-) 18.Nd5! Nd5 (18...Bd5 19.Bc4 Combination; 18...Nd5 19.Qh7) 19.Qh7 1–0. Janek – tscjs, internet, 2018.

6.Be2 Nbd7 7.d4 0-0 8.0-0 c6 9.Ba3 Qe7 (9...c5 10.Ng5 Re8 11.Nc3=+) 10.bc6= bc6 11.Bd6 Qd6 12.c4 a5 (12...Ba6 13.c5 Be2 14.cd6 Bd1 15.Rd1=) 13.c5+= Qc7 14.Nc3 Ne4 15.Qc2 Rf6 16.Rab1 Rh6 (16...e5 17.Rb2+=) 17.h3 Ba6 18.Ba6 Ra6 19.Rb2 e5 (19...Ra7!?+=) 20.Rfb1+- Nc3? (better 20...Ra7 21.de5 a4+-) 21.Rb7 (21.Qc3?! ed4 22.Nd4 Rf6 23.Nf5 Ra7+-) 21...Qd8 (21...Qc8 22.Qc3 ed4 23.Qd4 Ra8+-) 22.Rd7 Qd7 (22...Qf8 23.Qc3 e4+-) 23.Rb8 (23.Rb8 Kf7 24.Ne5 Ke6 25.Nd7+-) 1–0. Janek – tscjs, internet, 2018.

6.Be2 Nbd7 7.d4 0-0 8.0-0 Ne4 9.Nbd2 Qf6 10.c4 c6 11.Qb3 Qh6 12.h3 Rf6 13.Ne4 (13.cd5 ed5 14.Rac1 Rg6=) 13...fe4 14.Ne5 (14.Nh2 Qh4 15.Ba3 Rf2 16.Bd6 Re2 17.Qd1 Re3 18.bc6+-) 14...Qg5 (better 14...Be5!? 15.de5 Rg6=+) 15.f4+- (worse 15.bc6 bc6 16.f4 ef3 17.Nf3 Qg3=) 15...ef3 16.Nf3 Qg3 17.Ba3 Rf3? (better 17...a6 18.Bd6 Qd6 19.ba6 ba6+-) 18.Bf3+- Qh2 19.Kf2 Qg3 20.Ke2 Nf6 21.Bd6 Qd6 22.Kf2 Bd7 23.bc6 Bc6 24.Kg1 dc4 25.Qc4 Bf3 (25...Bd5 26.Qc3+-) 26.Rf3 (worse 26.gf3 Qg3 27.Kh1 Qh3 28.Kg1 Qg3 29.Kh1 Nd5=) 26...a6 (26...Rd8 27.Rc1+-) 27.Rc1 Rf8 28.Qc5 Qd7 29.a4! Nd5 (29...Qa4 30.Qc4 Double attack (30.Qc4 Decoy)) 30.Rf8 (30.Qf8?!=) 1–0. Pierre – Soldun, internet, 2019.

6.Be2 Nbd7 7.Nd4 Nb6 8.f4 0-0 9.a4 Ne4 10.0-0 =.

6.Be5 Be5 7.Ne5 Nbd7 8.d4 Ne5 9.de5 Nd7 10.f4 =.

6.Ne5 0-0 7.Be2 Nbd7 8.f4 Ne4 9.0-0 c5 10.d3 Be5 (10...Nef6 11.Nd2=) 11.fe5+= Ng5 12.a4 Nf7 (12...b6 13.Nd2+=) 13.d4 c4 (13...a6 14.c4 Qg5 15.cd5 Qe3 16.Rf2 ed5 17.dc5+-) 14.Qe1 Kh8 (14...a6 15.Ba3 Re8 16.Qc3+=) 15.Ba3+- Rg8 16.c3 (16.a5 Ng5+-) 16...a6 (16...Ng5 17.Nd2+-) 17.e4 de4 18.Bc4 (18.ba6 Qc7 19.ab7 Bb7+-) 18...Nb6+= 19.Bb3 ab5 20.ab5 Bd7 (20...Qd7 21.Qe2+=) 21.Nd2 (21.Qe2 Ra5 22.Be7 Bb5 23.Bd8 Be2 24.Ra5 Nd8+-) 21...Nh6? (21...Bb5!? 22.Be6 Bf1 23.Bf7 Bd3=) 22.c4 (22.Qe2 Qg5 23.c4 Be8+-) 22...Bb5+= 23.cb5 Qd4 24.Kh1 Qe5 25.Nf3 Qf6 (25...ef3 26.Qf2 Double attack (26.Qe5 Pinning; 26.Qe5 Deflection; 26.Qf2 Decoy)) 26.Ng1 Ng4 (26...Rgc8 27.Qf2 Nd5 28.Ne2+=) 27.Nh3 (27.h3 Qh6+-) 27...Rgd8 (27...Qe5 28.Rf4 Nd5 29.Bd5 ed5 30.Qb1-/+) 28.Ra2 (28.Nf2 Nf2 29.Qf2 Nd5+-) 28...Qe5+= 29.Nf4 Ra3 (better 29...Qb5!? 30.Be6 Re8+-) 30.Ra3+- g5 31.Qa1?? (better 31.h3 gf4 32.hg4 fg4 33.Qh4+-) 31...gf4= 32.Qe5 (32.Be6 e3 33.Kg1 Qa1 34.Raa1 Rd4=) 32...Ne5=+ 33.Be6 (33.Ra7 Nd5 34.Rb7 f3 35.gf3 Nf3=+ (worse 35...ef3 36.Bd5 ed5 37.b6+-)) 33...e3 (33...Nbc4 34.Ra7 Ne3 35.Rfa1=+) 34.Bf5 (34.Kg1!?=+) 34...e2-/+ 35.Re1 Nbc4 (35...f3 36.Kg1 Rg8 37.g4-+) 36.Raa1 (better 36.Ra2 f3 37.gf3 Nf3 38.Rae2 (worse 38.Ree2 Rd1 39.Kg2 Nh4 40.Kf2 Nf5-/+) 38...Ne1 39.Re1=) 36...Rd2-/+ 37.h4 (37.Kg1 Nd6 38.Bb1 Nb5 39.Ra8 Kg7-/+) 37...Ne3 (37...f3 38.Kg1 Ne3-+) 38.Be6?? (better 38.Be4 Rd1 39.Rb1=+ (39.Bb7 Ra1 40.g3 Re1 41.Kh2 Rg1 42.gf4 e1Q 43.Bg2 Rg2 44.Kh3 Qg3)) 38...Rd1 39.Bb3 (39.Rad1 ed1R (39...ed1B?! 40.Bd5-+; 39...ed1N?! 40.Bc8-+) 40.Rd1 Nd1-+) 39...Ra1 40.Ra1 Nd3 41.b6 (41.Kh2 e1Q 42.Re1 Ne1-+) 41...e1Q (41...Nf2 42.Kh2 Nfd1 43.Rd1 Nd1 44.Bd1 ed1Q-+) 42.Re1 Ne1 43.Ba4 Nd3 (43...N1g2 44.h5-+) 44.Bc6 Nc5 (44...bc6? 45.b7 Ng4 46.b8Q Kg7 47.Qc7 Kh6 48.Qf7+-) 45.Bf3 Nc4 (45...Kg7 46.Kg1-+) 46.Kh2 Kg7 47.Kh3 Nd6 (47...Ne5 48.Bd5-+) 48.g3 (48.Kg4 Nd7-+) 48...fg3 49.Kg3 Nc4 50.Kf4 Nb6 51.Ke5 Nba4 (51...Nbd7 52.Kd4-+) 52.Kd6 (52.Kd4 Kf6-+) 52...b5 53.Bd1 (53.Bg4 Kf6 54.Bd1 b4-+) 53...b4 54.Ke7 (54.Kd5-+) 54...b3 55.h5 (55.Kd6 Nc3 56.Bb3 Nb3-+) 55…h6 0–1. Selma Rico,Javier – Puerto Traver,Juan Manuel, Burriana op, 1990. (=1.Nf3 f5 2.b4 e6 3.Bb2 Nf6 4.b5 d5 5.e3 Bd6)

6.Ne5 Nbd7 7.f4 0-0 8.Be2 Ne4 9.0-0 Qf6 10.Nd7?? (better 10.Nc4 e5 11.Nd6 Nd6 12.fe5 Ne5 13.Bd4+=) 10...Qb2-+ 11.Nf8 Qa1 12.Nh7 Kh7 13.Nc3 (13.a3 Ba3 14.Bd3 Bf8-+) 13...Qd1 14.Rd1 (14.Nd1?? Nd2 15.Re1 Ne4-+) 14...Nc3 15.dc3 Bc5 16.Kf2 c6 17.c4 Bd7 (17...a6 18.bc6 bc6 19.cd5 ed5 20.Rd3-+) 18.h3 Re8 (18...a6 19.bc6 Bc6 20.g4-+) 19.g4 (19.a4 g5! 20.g3 Kg6-+) 19...fg4 (19...e5 20.cd5 cb5 21.Kf1-+) 20.Bg4 Rf8 21.cd5 cd5 22.c4?? (22.Kf3-+) 22...Rf4 23.Kg3 Rc4 0–1. GuestCMTG – GuestCQSB, freechess.org, 2017.

7.Nc3 c6 8.a4 Bd7 9.Be2 a6 (9...e5 10.c5 Bc7 11.d4=) 10.0-0 dc4 11.Bc4 Nd5 (11...ab5 12.ab5 Ra1 13.Qa1+=) 12.Nd5 (12.Qb3 Qb6+=) 12...ed5= 13.Be2 ab5 14.ab5 Ra1 15.Qa1 Rf7 (15...Qe7 16.Be5=) 16.bc6 (16.Be5 Qe7+=) 16...Nc6 17.Ne5 Ne5 18.Be5 Be5 (18...Be6 19.Rc1+=) 19.Qe5 Bc6 20.Rb1 (20.Ra1 f4+/–) 20...Qc7 (20...Qe7 21.Qb2+=) 21.Qc7 (21.Qd4 Qd6+=) 21...Rc7= 22.d4 Kf7 23.f4 (23.Kf1 g5=) 23...Ke6 (23...h6 24.Kf2=) 24.Rc1 (24.Rb6 h6=) 24...Kd6 25.Kf2 (25.Bd3 Bd7 26.Rc7 Kc7=) 25...Ba4 (25...b5 26.Bd3=) 26.Rc7 (26.Rb1 Bc2 27.Rb6 Kd7=) 26...Kc7 27.Ke1 (27.Bd3 g6=) 27...Bc2=+ 28.Kd2 Be4 29.g3 (29.g4 fg4 30.Bg4 Kc6=+) 29...Kb6 30.Kc3 Ka5 31.g4 Ka4 (31...fg4 32.Bg4 b5 33.Kb3=) 32.Kb2 (32.gf5 b5= (< 32...Bf5 33.Bf3+/–)) 32...Kb4 (32...fg4 33.Bg4 b5 34.Be6=+) 33.gf5 Bf5 34.h4 b5 35.Bf1 (35.h5 Be4=) ½–½. Skaug,Thorbjorn – Morkedal,Oyvind, NM Roros, 2002.

7.Nc3 c6 8.a4 Ne4 9.g3 (9.d3 Nc3 10.Bc3 Nd7=) 9...g5 (9...Nd7!?=+) 10.d3+= Nc5 (10...Nc3 11.Bc3 Nd7 12.Bg2+=) 11.Nd2 Qe8 12.d4 Ne4 13.f4 (13.h4 g4+-) 13...gf4 (13...Qg6 14.Nde4 fe4 15.Qc2+=) 14.ef4 (14.gf4 Nd7+=) 14...Qg6 15.Nde4 fe4 16.Qd2 Nd7 17.Nd1 (17.Ba3 Ba3 18.Ra3 Qh6=) 17...Nf6 18.Ne3 Bd7 19.Be2 a5 (19...h5 20.0-0=) 20.c5 (20.0-0 Nh5 21.bc6 Bb4+-) 20...Bc7+= 21.b6 Bd8 22.0-0-0 (22.g4 Be7+=) 22...Be7 (22...Nh5 23.Bc3+=) 23.g4+= Ne8 24.Rdf1 (24.h4 Rf4 25.Nc4 e3 (25...dc4? 26.Qf4 Nf6 27.h5+-) 26.Ne3 Rf2+=) 24...Ng7 (24...Qh6!? 25.Kc2 Qh4+=) 25.h4+- White prepares g5 25...h6 26.h5 Qh7 27.Qe1 (27.Kb1 Kh8+-) 27...Rf7 (27...e5!? 28.fe5 Bg5+=) 28.Qg3+- Kh8 (28...Raf8 29.Kb1+-) 29.g5 hg5 (29...Nf5 30.Nf5 Rf5 31.g6+-) 30.fg5+- Rf1 31.Nf1 (better 31.Rf1!? Nh5 32.Qe5 Qg7 33.Qh2 Bg5 34.Qh5 Kg8 35.Qh3+-) 31...Nf5+= 32.Qg1 Qg7 33.g6 Qh6 (33...Rg8 34.Nd2+=) 34.Kb1+= Bg5 (34...Bf6 35.Rh3+=) 35.Bg4 (better 35.Nh2!? Bf4 36.Ng4+-) 35...Rf8 36.Rh3 (36.Bc3 Kg7=) 36...Kg7 (36...Bf4 37.Qf2=+) 37.Bc3 (37.Be2=) 37...Ra8 (37...Bf4!?=+) 38.Ka2 (38.Be2!?+=) 38...Bf4= 39.Qg2 (better 39.Ng3!? Bg3 40.Rg3 Ng3 41.Qg3=) 39...Qg5-/+ 40.Qe2 (40.Rh1 Nh6 41.Bh3 Qg2 42.Bg2 Rf8-/+) 40...Kh6 (better 40...Nh6!? 41.Nh2 Kf8-+) 41.Qd1 (41.Nh2=+) 41...Kg7 42.Kb3?? (better 42.Qe2=) 42…Nh6-+ ½–½. Krafzik,Joachim (1875) – Fries,Karl Heinz (1690), GER–chA Seniors, 2004.

7.Nc3 c6 8.a4 e5 9.bc6 bc6 10.d4=.

7.Nc3 c6 8.d4 cb5 9.Nb5 Bb4 10.Bc3 Be7 =.

7.Nc3 Nbd7 8.Bd3 Nc5 9.Be2 Bd7 10.a4 Be8 11.0-0 Bh5 12.d4 Nce4 13.Ne5 Be2 14.Qe2 Nc3 15.Bc3 Ne4 16.Bb2 f4 17.f3 Ng3 18.hg3 fg3 19.f4 Qh4? (better is 19...Be5 20.Qg4 Bd6 21.Qe6 Kh8+=) 20.Nf3+- Qh5 21.Qe1 Qg4 0–1. chessxliv (2100) – sbeaulieu (2530), net–chess.com, 2014.

7.Nc3 Nbd7 8.d4 Ne4 9.c5 Be7 10.Bd3 a6 11.ba6.

7.Nc3 h6 8.d4+= dc4 (8...c6 9.c5 Bc7 10.Bd3+=) 9.Bc4 Kh7 10.0-0 c6 11.a4 Qc7 12.Qd3 (12.bc6 Qc6 13.Qb3 Na6+/–) 12...g6 (12...a6 13.Rfc1+/–) 13.e4 (13.bc6 a6+/–) 13...Ne4 14.Ne4 fe4 15.Qe4 Rf4 16.Qe2 cb5 17.ab5 (17.Be6?! Be6 18.Qe6 ba4=) 17...b6 (17...a6 18.Rfc1 Qe7 19.d5+/–) 18.g3 Rf8 19.Nh4 (19.Bd3 Qf7+/–) 19...Bb7?? (better is 19...Rf6+/–) 20.Qe6+- (20.Qe6 Qg7 21.Qd6+-; 20.Be6?! Qd8+-) 1–0. pcmvr (2870) – mpenga (2420), net–chess.com, 2009.

7.d4 a6 8.Qb3 b6 9.Nc3 ab5 10.Nb5 =.

7.d4 c5 =.

7.d4 c6 8.Nc3 Kh8 9.a4 Bd7 10.Bd3 Ne4 11.0-0 Be8 12.Qc2 Rf6 13.Rfc1 (worse is 13.Ne4 fe4 14.Be4 de4 15.Qe4 Bg6-/+) 13...Bh5 14.Ne5 (14.Ne4 fe4 15.Be4 de4-/+; 14.Be4?! fe4 15.Ne5 Rf5=) 14...Rh6 15.cd5 ed5 16.f4 (16.f3 Qg5 17.fe4 fe4+/–) 16...Be5 17.fe5 (17.Ne4? fe4 18.de5 ed3 19.Qd3 Qh4-+) 17...Nd7 18.Rf1 Qh4 19.Be4 (19.Rf5?! Bf3 20.h3 Bg2 21.Qg2 Rg6 22.Be4 de4 23.bc6 bc6+=) 19...fe4 20.Qf2 Qf2 21.Rf2 a6 22.bc6 bc6 23.Raf1 Rb8 24.Ba3 g5 25.Bd6 Rb3 26.Rc2 Re6 27.Rb1 Rb1 28.Nb1 c5 29.Nc3 cd4 30.ed4 Bf7 31.Rb2 Re8 32.Rb7 Be6 33.Nd5! Bd5 34.Rd7 Bc6 35.Ra7 Ba4 36.Ra6 Bb3 37.Kf2 Rc8 38.Be7 Rc2 39.Ke3 Bc4 40.Bf6 Kg8 41.Ra8 Kf7 42.Ra7 Ke6 43.Ke4 Re2 44.Kf3 g4 45.Kf4 Rf2 46.Kg3 Rd2 47.Rh7 Rd4 48.h4 gh3 49.gh3 Rd7 50.Rh6 Kf5 51.Rh5 Ke6 52.h4 Rd4 53.Rh8 Kf5 54.h5 Rg4 55.Kf3 Rg8 56.Rh7 Bd5 57.Ke3 Rg1 58.h6 Rh1 59.Rh8 Kg6 60.Bg7 Rd1 61.Rf8 Bc4 62.Rf6 Kh7 63.Rd6 Bb3 64.Rd1 Bd1 65.Kf4 Bh5 66.Kg5 Bg6 67.Kf6 Bf7 (67...Be4 68.e6 Kg8 69.Ke7+-) 68.e6 (68.Kf7?!) 68...Bg6 69.Ke7 Bd3 70.Kf8 Bg6 71.e7 Bf7 72.e8Q (72.Kf7?!) 72...Be6 (72...Be8 73.Ke8 Kg6+-) 73.Qb5 1–0. Feldborg,Brian – Correa Filho,Astolfo Belem, EM/J50/P140 ICCF Email, 2001.

7.cd5 ed5 8.Nc3 Qe7 9.a4 (9.Bd3 Nbd7=) 9...c6 (9...Nbd7 10.Be2=) 10.Be2= Nbd7 11.0-0 Ne5 12.Ng5 (12.Ne5 Qe5 13.f4 Qe7=) 12...Ne4 13.Nce4 fe4 14.f4 Ng6 (14...ef3!? 15.Nf3 Bf5=) 15.Bh5+= Bc5? (better 15...Bf5!?+=) 16.Bg6+- hg6 17.Qe1 (better 17.Rc1+-) 17...Bg4?? (better 17...Rf4! 18.Rf4 Qg5+=) 18.Qh4+- Bh5 19.g4 Rf6 (19...Qe8 20.gh5 gh5 21.Qg3+-) 20.gh5 gh5 21.Bf6 Qf6 (21...gf6 22.Nh3 cb5 23.Qh5 Qf7 24.Qg4 Qg7 25.Qg7 Kg7 26.ab5 d4+-) 22.Qh5 (22.Qh5 Qf5 23.Rac1+-) 1–0. DEFFM – GuestMKRH, freechess.org, 2019.

7.Be2 c6 8.a4 Nbd7 9.Nd4 Nb8 10.Qc2 Ne4 11.d3 Ng5 12.0-0 e5 13.Nb3 f4 14.ef4 Rf4 15.Bc1 Rf7 (better is 15...Rf8!?=) 16.cd5+/– Bd7 17.dc6 bc6 18.d4 cb5 (18...Ne6 19.Qe4 ed4 20.Bc4+/–) 19.Bb5 Qf6?? (better is 19...Be6+/–) 20.Bg5+- Qg5 21.Bc4 (better is 21.Qe4 Nc6 22.Bc6 Bc6 23.Qc6+-) 21...Bg4?? (better is 21...ed4 22.f4 Qe7+-) 22.Bf7 Kf7 23.Qe4 (23.Qe4 Nc6 24.Qd5 Be6 25.Qc6+-) 1–0. Brinks,Jan Willem – Fakkel,Ewout, NED–ch U20 op, 2000.

7.Ne5 a6 8.a4 (8.ba6 b6+=) 8...ab5 (8...Nbd7 9.Nd7 Bd7 10.d4+=) 9.ab5 Ra1 10.Ba1 c5 (10...Nbd7 11.Nd7 Nd7 12.Qf3+=) 11.Qb3 (11.d4 Ne4 12.Qa4 Be5 13.de5 Qh4-/+) 11...Nbd7 12.Nd7 Bd7 (12...Qd7 13.d4=) 13.Bf6 Qf6 (worse is 13...gf6 14.cd5 e5 15.Be2+/–) 14.cd5 e5 15.Be2 ½–½. Ferreiro,Ji – Lakunza,J, San Sebastian, 1995.

7.Ne5 Nbd7 8.Nd7 Bd7 9.d4 =.

7.Qb3 A) 7...Bb7 8.Nd4 (8.Nc3 Nbd7 9.cd5 Nd5 10.Bc4 Nc5 11.Qd1=; 8.d4 a6 9.Nc3 0-0 10.Rc1 ab5 11.Nb5=; 8.Bf6 Qf6 9.Nc3 dc4 10.Bc4 Qg6 11.Be2=; 8.cd5 Bd5 9.Bc4 c5 10.Bd5 Nd5 11.Nc3+=; 8.Na3 a6 9.Nd4 Qd7 10.Rc1 e5 11.Ndc2+=) 8...Qe7 9.cd5 Bd5 10.Bc4 Bg2 11.Rg1+=; B) 7...c5 8.bc6 Nc6 9.cd5 ed5 10.Bb5 Bd7 11.0-0+=; C) 7...a6 8.Nc3 (8.Bf6 Qf6 9.d4 dc4 10.Bc4 ab5 11.Bb5=) 8...ab5 9.Nb5 Be7 10.cd5 ed5 11.Qc2=.

7.Qc2 0-0 8.Be5 (8.cd5 Nd5 9.e4 fe4 10.Qe4 c6 11.Bd3=; 8.d4 a6 9.c5 Be7 10.cb6 cb6 11.Nc3=; 8.Be2 a6 9.0-0 dc4 10.a4 c6 11.Na3=; 8.Nd4 a6 9.cd5 Nd5 10.Bc4 ab5 11.Nb5+=; 8.Nc3 a6 9.cd5 Nd5 10.Bc4 ab5 11.Nb5=) 8...a6 9.Nc3 ab5 10.Bd6 cd6 11.Nb5 =.

7.Nc3 Bb7 (7...a6 8.Qb3= ab5 9.Nb5 Be7 10.Be5 Na6 11.Nfd4+=) 8.Nd4 (8.cd5 ed5 9.Nd4 g6+= 10.Be2 a6 11.0-0+=) 8...Qd7 9.cd5 Nd5 10.Bc4 0-0 11.Qb3 c6 (11...Be5 12.Ne6! Bc3 13.Nf8 Bd2 14.Kd2 Kf8+-) 12.Ne6! Qe6 13.bc6 Bc6 14.Nd5 (14.Bd5?! Bd5 15.Qd5 Qd5 16.Nd5 Rc8+/–) 14...Kh8 15.Nb6 Qg6 16.Na8 Ba8 17.Bd5 Nc6 (17...Nd7 18.Ba8 Ra8 19.Qd5+-) 18.Rc1 f4 (18...Ne7 19.Ba8 Ra8 20.0-0+-) 19.Bc6 (19.Rc6 Bc6 20.Bc6 Qb1 21.Ke2 Qg6+-) 19...Bc6 20.Rc6 (better is 20.Bg7 Qg7 21.Rc6 fe3 22.de3 Qg2 23.Qc3 Kg8 24.Qc4 Kh8+-) 20...Qg2 21.Rd6 Qh1 22.Ke2 fe3?? (22...f3 23.Kd3 Qb1 24.Qc2 Qf1 25.Ke4 Qh3+-) 23.Qf7! Qe1 (23...Rf7 24.Rd8) 24.Ke1 ef2 25.Kf1 1–0. pierre – hijran, internet, 2009.

7.d4 0-0 8.Ba3 (8.Nc3 a6 9.Be2 c6 10.bc6 Nc6 11.Rc1=; 8.Bd3 a6 9.Nc3 ab5 10.cb5 c5 11.dc5=; 8.Be2 a6 9.0-0 dc4 10.a4 c6 11.bc6=; 8.Ne5 a6 9.Bd3 dc4 10.Nc4 Bb4 11.Bc3=; 8.Qb3 a6 9.Nc3 Bb7 10.Rc1 ab5 11.Nb5=; 8.cd5 Nd5 9.Qb3 a6 10.Nc3 Bb7 11.Nd5=; 8.Qa4 a6 9.Nc3 Bb7 10.Qb3 ab5 11.Nb5=; 8.Qc2 a6 9.c5 bc5 10.dc5 Be7 11.a4=) 8...a6 9.Bd6 cd6 10.Qb3 ab5 11.cb5 =.

7.cd5 ed5 8.Qa4 0-0 9.Bd3 a6 10.0-0 Qe8 11.Rc1=.

7.cd5 ed5 8.Qb3 Be7 9.Bd3 (9.Qc2 0-0=) 9...0-0 (9...a6 10.Nd4=) 10.Nd4 Ne4 (10...f4!?=) 11.Be4+- fe4 12.Nc3 Bb7 (better 12...Bf6!? 13.Qd5 Qd5 14.Nd5 c5 15.bc6 Bd4 16.ed4 Nc6+-) 13.Ne6+- Qd6 14.Nf8 Bf8 (14...Kf8 15.0-0+-) 15.Ne4 Qe6 16.Ng3 Nd7 17.d4 Bd6 (17...a6 18.Rc1 Rc8 19.a4+-) 18.0-0 (18.Rc1 Rc8+-) 18...Rf8 (18...c5 19.bc6! Bc6 20.Ne2+-) 19.e4! Bg3 (19...de4 20.Qe6 Double attack (20.Qe6 Pinning; 20.Qe6 Deflection; 20.Qe6 Decoy)) 20.Qg3 (worse 20.hg3 Qe4 21.Rac1 Rc8+-) 20...Nf6 (20...de4 21.Rfc1 Rc8+-) 21.Qc7 Rf7 (21...Bc8 22.e5 Nh5 23.Bc1+- (23.Qa7?! Qg6 24.f3 Nf4+-)) 22.Qd8 (22.Qb8 Ne8 23.e5 a6+-) 22...Ne8 (22...Rf8 23.ed5 Bd5+- (23...Rd8?? 24.de6 Re8 25.Rfe1+-)) 23.e5 h6 (23...Rd7 24.Qb8+-) 24.Rac1 Rd7 25.Qb8 Kh7 (25...a6 26.f4 g6 27.Rf3 ab5 28.g4+-) 26.Qa7 Bc8 27.Qa3 Rb7 28.Rc6 Qf5 29.e6! Be6 30.Qa8 Bf7 (30...Re7 31.Ba3 Rc7 32.Qe8 Bd7+-) 31.Qb7 Bg6 (31...Bh5 32.a4+-) 32.Qb6 Nf6 33.Rf6! Qc2 (33...Qf6 34.Qf6 Combination; 33...gf6 34.Qc7 Decoy) 34.Rg6! Qg6 35.Qg6 Kg6 36.b6 (36.b6 Kf6 37.b7 Ke7 38.Re1 Kf7 39.b8Q Kg6 40.Qe8 Kh7 41.a4 h5 42.Qh5 Kg8 43.Re8) 1–0. onur604 (2320) – ruben1951 (2035), lichess.org, 2020.

7.cd5 ed5 8.Qc2 0-0 9.Bd3 Ne4 10.Nc3 Bb7 11.Nd4=.

7.cd5 ed5 8.Bd3 a6 9.Qc2 Bd7 10.a4 g6 11.Nc3 +=.

7.cd5 ed5 8.Bd4 c5 9.bc6 Nc6 10.Bb5 Bd7 11.Nc3=.

7.cd5 ed5 8.Nd4 f4 9.ef4 0-0 10.f5 a6 11.Qf3=.

7.cd5 ed5 8.Be5 a6 9.Nc3 ab5 10.Bd6 Qd6 11.Nb5=.

7.Be5 a6 8.cd5 (8.Bd6 cd6 9.cd5 Nd5 10.Bc4 Bb7 11.Nd4=; 8.Nc3 ab5 9.Nb5 Be5 10.Ne5 0-0 11.d4=; 8.d4 0-0 9.Be2 Bb4 10.Nbd2 dc4 11.Bc4=) 8...ed5 9.Nc3 ab5 10.Bd6 Qd6 11.Nb5 =.

7.Ne5 Bb7 8.cd5 (8.d4 0-0 9.Bd3 a6 10.0-0 ab5 11.cb5=; 8.f4 a6 9.cd5 Bd5 10.Nc3 0-0 11.Nd5=) 8...Bd5 9.f4 a6 10.Nc3 0-0 11.Nd5 =.

7.Bf6 Qf6 8.Nc3 (8.d4 a6 9.Nc3 ab5 10.Nb5 Bb4 11.Nd2=) 8...dc4 9.Bc4 a6 10.d4 c6 11.bc6 =.

7.a4 0-0 8.Qc1 Bc5 (8...Nbd7 9.d4=+) 9.Bc3 (9.cd5 Qd5 10.Be2 Nbd7+-) 9...Nh5 (better 9...Nbd7!?=+) 10.d4 (better 10.cd5 Qd5 11.d4+-) 10...Qe7?? (better 10...Be7+=) 11.Ra3 (better 11.dc5 Nd7 12.Nbd2+-) 11...Qg5?? Black intends f4 (better 11...Ba3 12.Na3 Nf6-/+) 12.Ra2 (better 12.Ng5 Ba3 13.Qa3 Re8+-) 12...Be7 (12...Qe7 13.dc5 a6+-) 13.cd5 (better 13.Ng5 Bg5 14.Be2+-) 13...Qg3?? (better 13...Qh6 14.dc6 bc6+-) 14.e4 (better 14.hg3 Nf6 15.dc6 bc6+-) 14...f4?? (better 14...Qg4 15.dc6 Nf4 16.ef5 Nc6=) 15.fg3 (15.hg3 g6 16.g4 Ng7 17.dc6 bc6+-) 15...Bd7 16.bc6 Bd6 17.a5 (17.cb7 Na6 18.ba8R Ra8 19.Ba6 ed5+-) 17...Be8 18.Qd1 (better 18.cb7 Bc6 19.dc6 Nc6 20.ba8R Ra8+-) 18…ed5 1–0. Pereira – GuestFreaw, internet, 2020.

7.a4 0-0 8.Be2 Qe7 9.0-0 Bd7 10.Ba3 Ba3 11.Na3 Ne4 12.d3 Nf6 13.Nc2 a6 14.d4 ab5 15.ab5 Ra1 16.Qa1 Be8 17.Ne5 Nfd7 18.Nd3 Nb6 19.cd5 cd5 20.Nf4 g5 21.Nd3 Nc4 22.Rb1 Nd7 23.Ndb4 Ndb6 24.Na3 Na3 25.Qa3 Nc4 26.Qc3 Bb5 27.Nd5 ed5 28.Rb5 Rc8 29.Rd5 Nd6 30.Qb3 Rc1 31.Bf1 Qe6 32.g3 Ne4 33.Rd8 Kf7 34.Rf8 Ke7 35.Re8 Ke8 36.Qe6 Kf8 37.Qf5 Kg7 38.Qe4 Rc6 39.Qe5 Rf6 40.Qg5 Kf7 41.Qd5 Re6 42.Bh3 Ke7 43.Qe6 Kf8 44.Bf5 Kg7 45.Qe7 Kh6 46.Qh7 Kg5 47.Qg6 1-0. chumbonalagoa (2145) - dgalanis (2035), Rated Bullet tournament, lichess.org.

7.a4 a6 8.Nc3 ab5 9.ab5 Ra1 10.Ba1=.

7.a4 a6 8.Nc3 Nbd7 9.d4 Ne4 10.c5 Bc7 11.b6 Bb8 12.Bd3 (12.Be2 Qf6+=) 12...Qf6 (12...e5 13.Be2=) 13.0-0 (13.Rc1 0-0+=) 13...e5 (13...Nc3!? 14.Bc3 Nc5=+) 14.Ne5 Ne5 15.de5 Be5 (15...Qe5 16.f4 Qe7 17.Ne4 fe4 18.Be2=) 16.Ne4 (16.Be4 A) 16...fe4? 17.Qh5 g6 18.Ne4 de4 A1) worse 19.Be5 Qe7 (19...gh5? 20.Bf6 Rf8 21.Bh4+-) 20.Bd6 gh5 21.Be7 Ke7-/+; A2) 19.Qe5 Qe5 20.Be5+-; B) worse 16...de4 17.Ne4 Bh2 18.Kh2 Qh6 19.Kg1 fe4 20.Qd4+-; C) 16...Qh6 17.h3 Bc3 (worse 17...fe4 18.Nd5 Bb8 19.Nc7 Bc7 20.bc7+-) 18.Bc3 fe4=) 16...fe4?? (better 16...de4 17.Be5 Qe5=) 17.Qh5+- (17.Qh5 g6 A) 18.Be5?! Qe7 (18...gh5? 19.Bf6 Rf8 20.Be4+-) 19.Qd1 Qe5=; B) 18.Qe5 Qe5 19.Be5+-) 1–0. GuestSNPJ – GuestCCPM, freechess.org, 2018.

7.a4 a6 8.Nc3 Nbd7 9.Nd4 Ne5 10.cd5 cd5 (worse 10...Nd5 11.f4 Ng6 12.bc6 bc6 13.Nc6+=) 11.f4 Nc4 12.Bc4 dc4 13.Qe2 Qc7 14.a5 1–0. GuestSNPJ – GuestJPQK, freechess.org, 2018.

7.Nc3 0-0 8.Be2 Nbd7 9.0-0 a6 10.a4 ab5 11.ab5 Ra1 12.Qa1 Ne4 (12...f4 13.d4=) 13.d3+= Nef6 (13...Ng5 14.Nd4 c5 15.Nc2=) 14.d4 Ne4 (14...dc4 15.bc6 bc6 16.Rb1+=) 15.c5 (15.Ba3 Ba3 16.Qa3 Qf6+=) 15...Be7 (15...Bc7 16.Qa8+=) 16.Qa4+- Qc7 (16...cb5 17.Qb5 Qc7 18.Rc1+-) 17.b6 (17.Rc1 e5+=) 17...Qd8 18.Qc2 Bf6 19.Ra1 e5 20.Ne4 fe4 21.Ne5 Ne5 22.de5 Bh4 23.g3 (23.f3 ef3 24.Bf3 Bf5+-) 23...Bg5 (23...Be7 24.Ra7+=) 24.Bf1 (24.Ra7 Qd7 25.Bd4 Qe6+=) 24...Qe7 25.Bg2 Bg4 (25...Be6 26.Ra7+=) 26.Ra7 Bf3 (26...Qf7 27.h3 Be6 28.Qd2+=) 27.Bf3+- Rf3 28.e6 Bf6?? (28...Qe6 29.Rb7 Deflection) 29.Ra8+- (29.Ra8 Qf8 30.Rf8 Kf8 31.Qa4 Bb2 32.Qa8 Ke7 33.Qb7 Ke6 34.Qc6 Kf5 35.Qd5 Kf6 36.Qd6 Kg5 37.b7+-) 1–0. DEFFM – GuestZHLG, freechess.org, 2018.

7.Nc3 0-0 8.Be2 Ne4 9.cd5 cd5 10.0-0 Nd7 11.Rc1 Qe7 12.Qc2 b6 (12...Ndc5 13.Nb1=) 13.Nd4+= Bb7 (13...Ndc5 14.Nc6 Qc7 15.f4+=) 14.Nc6 Bc6 (14...Qh4 15.f4 Nc3 16.Bc3+-) 15.bc6+- Ne5 (15...Nc3!? 16.Bc3 Nc5+-) 16.Nb5+- a6? (better 16...Ng4!? 17.Nd6 Qd6+-) 17.Nd6 Qd6 18.d3 Nf6 19.Qc3 Ng6 20.Ba3 Qc7 21.Bf8 Kf8 (21...Rf8 22.d4+-) 22.Rc2 Ne7 23.Qa3 Kf7 24.Rb1 Ne8 25.Rcb2 Nc8 26.Qa4 Ned6 27.Qh4 h6 28.Rc2 a5 (28...Ne7 29.Bh5 g6 30.Bf3+-) 29.Bh5 g6 (29...Kf8 30.Qd4+-) 30.Bf3 h5 31.e4 de4 32.de4 Ne7 (32...e5 33.ef5 Nf5 34.Qc4 Kf8 35.Qe6+-) 33.e5 Ne8 34.Qd4 Rb8 35.a4 (better 35.h4 a4 36.Rd1+-) 35...f4 (35...Rd8 36.Qb6 Qb6 37.Rb6+-) 36.Qf4 Nf5 (36...Kg7+-) 37.Rd1 Rd8 38.Rd8 Qd8 39.Rd2 Qc8 (39...Qh4 40.Rd7 Kf8 41.Qh4 Nh4+-) 40.Qg5 (40.Rd7 Kf8 41.Qg5 Neg7 42.Qf6 Kg8 43.Rd8 Qd8 44.Qd8 Kf7 45.Qf6 Kg8 46.c7 Kh7 47.c8Q b5 48.Qff8 Kh6 49.Qh8 Kg5 50.Qc1 Ne3 51.Qe3 Kf5 52.Qf8) 40...Ne7 41.Rd7 (41.Rd7 Qd8 42.Rd8 Nf5 43.c7 Ne7 44.Be4 h4 45.c8Q h3 46.Re8 Nc8 47.Qg6) 1–0. Pierre – Stous, internet, 2020.

7.Be2 0-0 8.0-0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 cb5 12.cb5 Nbd7 13.d4 Ne4 14.Nc3 Ndf6 15.Ne4 Ne4 16.Ne5 Bd7 17.f3 Nf6 18.Qd2 Qb6 Attacking the isolated pawn on b5 19.Bc3 Ra8 (19...Bb5? 20.Rb1+-) 20.Nd7 (20.Bb4 Be5 21.de5 Ne8=+) 20...Nd7= 21.Rc1 Nf6 22.g3 Kf7 23.Bd3 Ke7 (23...Ra3 24.Rc2=) 24.Kg2 Ra4 25.h3 Qa7 26.g4 Ra2 27.Rc2 Rc2 28.Bc2 g6 29.Bd3 Qa3 30.Qc2 Bb4 31.Bb2 Qa5 32.gf5 (32.g5 Ne8+=) 32...gf5= 33.Qc8 Qd8 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

7.Be2 0-0 8.0-0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 b6 12.Nc3 c5 13.d4 Bb7 14.dc5 bc5 15.Qc2 dc4 (15...f4!?=) 16.Bc4+/- Qe7 (16...Bf3!? 17.Be6 Kh8 18.gf3 Bh2 19.Kg2 Qe8 20.Bf5 Be5+/-) 17.Qf5+- Nd5 18.Qg4 Nd7 19.Ne4 N7f6? (better 19...g6+-) 20.Bf6 Nf6 (20...Rf6 21.Nf6 Qf6+-) 21.Qe6 Kh8 22.Nd6 Qe6 23.Be6 Bf3 24.gf3 Nh5 (24...Rb8 25.Rc1+-) 25.Nf7 (better 25.b6 Rb8 26.b7 g5+-) 25...Kg8 26.Nd8 Kh8 27.Nf7 (better 27.Rd1 c4 28.Bc4 h6+-) 27...Kg8 28.b6 g6 29.Nd8 Kg7 30.Rd1 Nf6 31.b7 1-0. onur604 (2320) - NiGko (2195), Casual Rapid game, lichess.org, 2021.

7.Be2 0-0 8.0-0 Bd7 9.a4 cb5 10.ab5 dc4 11.Bc4 Qb6 12.Qb3 Re8 13.Nd4 Kf7? (better is 13...Kh8!?+=) 14.Nf5+- Bc7?? (14...Rc8 15.Nd6 Qd6 16.f4+-) 15.Bf6 (better is 15.Bd4 Bh2 16.Kh2 Qc7 17.Kg1+-) 15...Kf6+/– 16.Ng3 Qd6?? (16...Kf7 17.d4+-) 17.Nc3 (better is 17.Ne4 Kf7 18.Nd6 Bd6 19.Qd3+-) 17...Kf7 18.Nce4 Qe5?? (better is 18...Qb6+-) 19.d4 Qf6 20.Nf6 gf6 21.d5 ed5 (21...Be5 22.de6 Be6 23.Be6 Re6 24.Rac1 Bg3 25.hg3+-) 22.Bd5 Kg6 23.Bb7 (23.Bb7 Bg3 24.fg3+-) 1–0. mr5reasons1 (1690) – kleberkabg, gameknot.com, 2013.

7.Be2 0-0 8.a4 a6 9.Nc3 Bd7 10.0-0 Ne4 11.d3 Nc3 12.Bc3 Be7 13.Qb3 dc4 14.dc4 Bf6 (14...cb5 15.cb5 Bf6 16.Ne5+/–) 15.Ne5 (15.Bf6 Qf6 16.ba6 Na6 17.Qb7 Nc5+/–) 15...Qc7 16.b6 (16.Nd7?! Nd7 17.Bf6 Rf6+=) 16...Qd8 17.Rad1 Qe8 18.c5 Qe7 19.Rd6 Bc8 20.Rfd1 Be5 21.Be5 Nd7? (21...Kh8 22.Qd3+-) 22.Qc3 (better is 22.Re6 Qf7 23.Rd7 Bd7 24.Re7+-) 22...Nf6 23.Bf6 Qf6 24.R1d4 Qe7 25.Bc4 Kh8 26.Qd2 (26.Rd3 e5+-) 26...e5+/– 27.Rd3 h6 28.f4 e4 29.R3d4 Kh7 30.Qd1 Rf6 31.Qb3 (31.Rf6 Qf6 32.Rd8 Be6 33.Ra8 Bc4+-) 31...Rd6+/– 32.cd6 Qh4? (better is 32...Qd8+/–) 33.d7+- Qe1 34.Bf1 Bd7 35.Rd7 Rb8 36.Rd1 Qh4 37.Be2 (37.Qf7!? Qf6 38.Qc7 Qf8+-) 37...Qe7 38.Qc4 Qa3 39.Kf2 Qb2 (39...Qe7 40.Qd4+-) 40.Qd4 (40.Qf7 Qf6 41.Qf6 gf6+-) 40...Qb3 41.Qe5 Rf8 42.Rd7 Rg8 43.Qf5 Kh8 44.a5 Qa4 45.Rb7 (45.Rb7 Qb4 46.Rc7+-) 1–0. Chirpii,Alexandru – Samostrol,Elena, Geller Memorial op–B 4th, 2008.

7.0-0 a6 8.a4 Bd7 9.Na3 c6 10.Ne5 =.

7.0-0 b6 8.c4 c5 9.d4 Ne4 10.cd5+= ed5 11.dc5 Bc5 12.Qb3 Kh8 (12...f4 13.Rd1 Be6 14.Nc3 Nc3 15.Qc3+-) 13.Nc3 Bd6 (13...Nc3 14.Qc3 Qe7 15.Rfd1+-) 14.Nd5 (14.Rfd1 Bb7+-) 14...Be6 15.Rad1 a5 (15...a6 16.Bc4+-) 16.g3 (16.Bc4 Nd7+-) 16...Nd7 17.Nd4 Bg8 18.Nc6 (better 18.Bc4+-) 18...Ndc5?? (better 18...Qg5+-) 19.Bg7!+- Kg7 20.Qb2 Kh6 (20...Kg6 21.Nd8 Bd5 22.Rd5 Rfd8 23.Bh5 Kh6 24.Rf5+-) 21.Nd8 Rad8 (21...Bd5 22.Rd5 Rad8 23.Rfd1+-) 22.Nb6 Na4 (22...Bc7 23.Nc4 Na4+-) 23.Na4 1–0. DEFFM – GuestTTTF, freechess.org, 2018.

7.0-0 c5 8.c4 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Qa5 12.Bc3 Qa2? (12...Qc7 13.Qb3=) 13.d3 (better is 13.Bf6!? gf6 14.Nc3+-) 13...Nbd7 14.Qd2 Qd2 15.Nbd2 Nb6 16.Ra1 Bd7 17.Ra7 Rb8 18.g3 Bc8 19.Ba5 Nfd7 20.Ng5 Ra8 21.Ra8 Na8 22.Ne6 dc4? (better is 22...Ndb6 23.Nf4 dc4 24.Nc4 Nc4 25.dc4 b6+-) 23.Nc4 Be7 24.Bf3 Kf7 25.Nc7 (25.Bd5!? Ndb6 26.Nd8 Ke8 27.Nb6 Nb6 28.Bb6 Bd8 29.Bc5 b6+-) 25...Nc7 26.Bc7 Ke6 27.Bg2 Nf8?? (better is 27...g5+-) 28.Nb6 Bd7 29.Nd7 (better is 29.Bd5 Kf6 30.Nd7 Nd7 31.Bb7 c4 32.dc4 Bc5+-) 29...Kd7 30.Be5 1–0. algernon (2515) – marcosarrudaa (2510), net–chess.com, 2014.

7.0-0 c5 8.c4 Nbd7 9.d4 cd4 10.Qd4 e5 11.Qh4 Qe8 12.Nc3 h6 (12...Nb6 13.cd5 e4 14.Nd4+=) 13.Rac1 (13.Nd5 Nd5 14.cd5 e4+/–) 13...Nb6 14.c5 Bc5 15.Nd5 Nbd5 16.Rc5 b6 17.Rc2 Bd7 18.a4 Rc8 (better is 18...e4!? 19.Ne5 a6+/–) 19.Rc8+- Bc8 20.Ne5 Bb7 21.Rd1 f4 (21...Qe6 22.Bc4 Kh7 23.Bd4+-) 22.Bc4 (22.ef4!? Qe6 23.Bc4 Qf5+-) 22...fe3 23.fe3 Qh5?? (23...Kh8 24.Qd4 Qh5+-) 24.Qh5 Nh5 25.e4 Nhf4 26.ed5 1–0. pierred (2780) – tche (2345), net–chess.com, 2016.

7.0-0 c6 8.a4 a6 9.c4 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.Nc3 Qe7 (12...Nb6 13.bc6 bc6 14.cd5 Nbd5 15.Nd5 cd5 16.Bd4=) 13.d4 Ne4 (13...dc4 14.Bc4 Nb6 15.Bd3=) 14.c5+= Bc7 15.Qa4 Nb8?? (better 15...cb5 16.Nb5 Nb8+-) 16.b6+- Bd8 17.Qa8 Bb6 (17...Nd7+-) 18.cb6 Nd7 19.Qa5 g5 (19...e5 20.Ne4 fe4 21.Ne5 Ne5 22.de5+-) 20.Bb2 g4 (20...Qd8 21.Ba3 Re8 22.Rb1+-) 21.Ba3 c5 (21...Qd8 22.Ne5 (22.Bf8?! gf3 23.Bf3 Qf8+-) 22...Ne5 23.Ne4 fe4 24.Bf8 Nf3 25.Bf3 gf3 26.Bh6+-) 22.Ne5 Ne5 23.de5 Qg7 (23...Nc3 24.Qc3 Bd7 25.Bc5+-) 24.Ne4 fe4 (24...de4 25.Rc1 Bd7 26.Rc5+-) 25.Qc5 Re8 26.Qc7 Qg6 (26...Qc7 27.bc7 Kg7+-) 27.Bb5 1–0. Adlai – Nervin, corr, 2018.

7.0-0 c6 8.a4 a6 9.c4 ab5 10.cb5 cb5 11.ab5 Bd7?? 12.Ra8+- Qb6 (12...Qc7 13.Qb3+-) 13.Bd4 Qc7 (13...Bc5 14.Nc3 Bd4 15.ed4+-) 14.Qc1 Qd8 15.Ne5 Be8 (15...Bc8 16.Qc2+-) 16.f4 Qe7 (16...Bh5 17.Bh5 Nh5 18.Ra7+-) 17.Ra7 Ne4 (17...Bh5 18.Bh5 Nh5 19.d3+-) 18.Qc2 Qh4 (18...Nf6 19.Rc1+-) 19.Rb7 Bh5 (19...Nf6 20.Rb6 Be5 21.fe5+-) 20.Nf3 Bf3 21.Rg7 Kh8 22.Rg4 Nf6 23.Rh4 Be2 24.Bf6 Rf6 25.Qc8 Rf8 26.Qe6 Bf1 27.Qg6 (27.Qg6 Rf7 28.Qf7 Bb5 29.Rh7) 1–0. Janek – Docce, internet, 2018.

7.0-0 c6 8.a4 Qc7 9.g3 Ne4 10.d3+= Nf6 11.Nbd2 e5 (11...a6 12.c4+=) 12.c4+= e4 (12...Qe7 13.Qb3+=) 13.Nd4+- c5 14.N4b3 b6? (better 14...ed3 15.Bd3 Be6+-) 15.de4+- Ne4?? (15...Nbd7 16.ed5 Ne5+-) 16.Ne4 fe4 (16...Bb7 17.Nd6 Qd6 18.a5+-) 17.Qd5 Kh8 (17...Qf7 18.Qa8 Bh3 19.f4 Bf1 20.Kf1+-) 18.Rfd1 (better 18.Qa8 Bb7 19.Qa7 Nd7+-) 18...Be7 (18...Nd7 19.Qd6 Qd6 20.Rd6+-) 19.Qa8 Nd7 20.Qc6 Qc6 (20...Bd8 21.a5 Qc6 22.bc6+-) 21.bc6 Nf6 (21...Nb8 22.c7 Nc6 23.a5+-) 22.a5 Bg4 (22...Kg8+-) 23.Bf6 Bf6 24.Bg4 1–0. Janek – Gusten, internet, 2018.

7.0-0 Bd7 8.a4 b6 9.c4 c6 10.Nc3 Ne4 11.d3 Nc3 12.Bc3 Qc7 13.cd5 ed5 14.Qb3 (14.Rc1 Re8+=) 14...Be6 (14...Re8 15.Rfc1+=) 15.Qb2 (15.Ng5 Bh2 16.Kh1 Qe7 17.Ne6 Bd6=) 15...c5 (15...Re8 16.a5+=) 16.Ng5+- Re8 (16...Bc8 17.Qa2 Kh8 18.Bf3+-) 17.Ne6 (17.Bf3 Qe7 18.Ne6 Qe6+-) 17...Re6+- 18.Bf3 Rh6?? (better 18...Bh2 19.Kh1 Qd6+-) 19.Bd5 Kh8 20.g3 (better 20.f4 Nc6 21.a5 Rd8 22.ab6 ab6 23.bc6 Rg6+-) 20...Rg6 (20...Nc6 21.Bc6 Rd8 22.a5+-) 21.Ba8 Nd7 22.a5 h5 (22...Qb8 23.Bg2+-) 23.Bf3 (23.Qe2 Rh6+-) 23...h4 24.Ra4 hg3 (24...f4+-) 25.Bg7! Rg7 (25...Rg7 26.Rh4) 26.Rh4 Kg8 27.Bd5 Kf8 28.Rh8 Rg8 29.Rg8 Ke7 30.Qg7 1–0. Janek – Stugess, internet free game, 2017.

7.0-0 Bd7 8.a4 c6 9.Nc3 Be8 (9...a6 10.d4=) 10.Nd4 Qe7 11.f4 c5 12.Nf3 Bh5 13.Qe1 Nbd7 14.a5 a6 15.ba6 (15.Qh4 Bg4=) 15...ba6= 16.Qh4 Bf3 17.Bf3 Ne4 18.Qe7 Be7 19.Ne4 de4 (19...fe4 20.Bg4 Kf7 21.c4=) 20.Be2+= Rfb8 21.Rfb1 Kf7 22.Bc3 g6 (22...Bf6 23.Bf6 Kf6 24.d4=) 23.Rb8+- Nb8 24.Rb1 Nc6 25.Rb6 The isolani on a6 becomes a target 25...Nb4 26.Bc4 Nd5 27.Be5 (worse 27.Ra6 Ra6 28.Ba6 Nc3-/+) 27...Nb6 (27...Bd8 28.Rb7 Be7 29.Bd6+-) 28.ab6+- a5 29.Bb5 Rd8 30.b7 c4 (30...g5 31.fg5 Bg5 32.Bc7+-) 31.b8Q Rb8 32.Bb8 Bb4 (32...c3 33.dc3 g5 34.Bc7+-) 33.c3 (33.Bc4?! Bd2 34.Kf2 a4+-) 33...Bc5 (33...Ba3 34.Bc7 (34.Bc4?! Bc1+-) 34...Bc1 35.Kf2+- (35.Bc4?! Bd2 36.Ba5 Be3 37.Kf1 Bf4+-)) 34.Bc7 (34.Bc4?! a4+-) 34...Kf6 35.Kf2 h6 36.Bd8 Kf7 37.Ba5 Ba3 38.Bb4 Bb2 39.Bc4 Kf6 (39...g5 40.Ke2 Ba1 41.fg5 hg5 42.Kd1+-) 40.Ke1 e5 41.fe5 Ke5 42.Kd1 g5 Black prepares f4 43.Kc2 Ba1 44.Kb1 f4 (44...Bc3 45.Bc3 Kd6 46.d3 ed3 47.Bd3+-) 45.Ka1 f3 (45...Kf5 46.ef4 gf4 47.d4 ed3 48.Bd3 Ke5 49.c4+-) 46.gf3 ef3 (46...Kf5 47.fe4 Ke4+-) 47.d4 Kf6 48.d5 g4 49.d6 h5 (49...Kg6 50.d7 Kf6 51.d8Q Kg6 52.Qg8 Kh5 53.Be7 g3 54.Bf7) 50.d7 Kf5 (50...g3 51.d8Q Kf5 52.Bd3 Ke6 53.Qd6 Kf7 54.Qg6) 51.d8Q Kg6 52.Bd3 Kf7 53.Qg5 Ke6 (53...g3 54.Qg6) 54.Qf5 1–0. Rico – Sutterney, internet, 2019.

7.0-0 Qe7 8.a4 Nbd7 9.d4= c6 (9...e5 10.c4 e4 11.Nfd2 dc4 12.Nc4=) 10.Nbd2 (10.c4 dc4 11.Nbd2 Nb6=) 10...a6 (10...Ne4 11.c4=) 11.c4 ab5 (11...c5 12.Qc2+=) 12.c5+= Bc7 13.ab5 Ra1 14.Qa1 Ne4 Black prepares f4 (14...cb5 15.Bb5 Nb8 16.Qa4+=) 15.bc6+- bc6 16.Qa8 Nb8 (16...Ndf6 17.Qc6 Bb7 18.Qa4+- (18.Qb7?? Bh2 19.Kh2 Qb7-+)) 17.g3 (17.Ne4 fe4 18.Ne5 Be5 19.de5 Qb7 20.Qb7 Bb7+-) 17...g5 Black intends f4 18.Rd1 f4 (better 18...Qg7!?+-) 19.Ne4+- de4 20.Nd2 fe3 (20...Qg7 21.Bc3+-) 21.fe3 Bd7 (21...Qg7 22.Rf1+- (22.Ne4?! Qg6 23.Nc3 Qc2+-)) 22.Qa2 Be8 (22...h5 23.Ne4 h4 24.Qb3+-) 23.Bc4 Bf7? (23...Nd7 24.Ne4 Nf6 25.Be6 Bf7 26.Ng5 Nd5 27.Nf7 Qe6+-) 24.Rf1 h5 (24...Nd7 25.Ne4 Bd8 26.Qa4+-) 25.Ne4 Nd7 26.Qa4 h4 (26...Be8 27.Qc6 Rf1 28.Kf1+-) 27.Qc6 hg3 (27...Nb8 28.Qb7 Be8+-) 28.Qc7 gh2 (28...Bg6 29.Ng3 Rf1 30.Kf1 Kf8+-) 29.Qh2 Bg6 30.Rf8 Nf8 31.d5 Be4 (31...e5 32.d6 Qe6 33.Qe5 Kf7 34.Qf6 Ke8 35.Be6 Ne6 36.Qe7) 32.Qh8 Kf7 33.d6 (33.d6 Ng6 34.Qg7 Ke8 35.de7 Bd3 36.Be6 Ne7 37.Bf6 Nd5 38.Qf7) 1–0. Adlai – Nervin, corr, 2018.

7.0-0 Qe8 8.c4 c6 (8...Nbd7 9.Nc3=) 9.a4 Nbd7 10.d4 f4 (10...Ne4 11.Nc3=) 11.ef4+= Bf4 (11...dc4 12.bc6 Nb6 13.Ne5 bc6 14.g3+-) 12.Ba3+- Rf7 13.Re1 (13.g3 Bh6 14.Nc3 e5 15.cd5 cd5 16.de5 Ne5+-) 13...Nb6 (13...Ne4!?+=) 14.g3+- Bh6 (14...Bc7 15.cd5 Nbd5 16.Ng5+-) 15.Ne5 (15.cd5 Nbd5 16.Ne5 Rc7+-) 15...Ne4 (15...Nc4 16.Bc4 dc4 17.Nc3+-) 16.f4 Bf4? (better 16...Rf5!?+-) 17.gf4+- Rf4 (17...cb5 18.Nd2 Nd2 19.Qd2 ba4 20.cd5 Nd5 21.Bh5+-) 18.bc6 (18.Nd2 Nc3 19.Qc2 Ne2 20.Re2 Qh5+-) 18...Nf2 (18...Nc4 19.Bc4 dc4 20.Rf1 Rf1 21.Qf1 bc6 22.Qe2+- (22.Qc4?! Qh5=)) 19.Qb3 Qe7?? (19...dc4 20.Qg3 Rf5+-) 20.Be7 (20.Be7 dc4 21.Bc4 bc6 22.Be6 Be6 23.Qe6 Kh8 24.Bg5+-) 1–0. DEFFM – GuestXMRK, freechess.org, 2019.

7.0-0 Qe8 8.d4 a6 9.a4=.

7.0-0 Qe8 8.d4 Bd7 9.a4 a6 10.ba6 (10.Na3 Ne4=) 10...Na6 (worse is 10...Ra6 11.Ba6 Na6 12.c4+/–) 11.c4 c6 (11...dc4 12.Bc4 Nd5 13.Nc3=) 12.c5+= Bc7 13.Nc3 Qh5 (13...e5 14.Ba6 Ra6 15.Ne5 Be5 16.de5 Qe5 17.Qd4=) 14.Ne5 (14.Rb1 Qh6+=) 14...Qh4 (14...Qh6 15.Ba3+=) 15.f4 Bc8 (15...Be5 16.fe5 Ng4 17.Bg4 fg4 18.Rf8 Rf8 19.Qe1 Qe1 20.Re1+=) 16.Rf3 (16.Rb1 Ba5+=) 16...Ne4 17.Ne4 fe4 18.Rh3 Qe7 (18...Qf6 19.Qe1+=) 19.Ba6 (19.Qe1 Nb8+=) 19...Be5 (worse is 19...Ra6 20.Qh5 Be5 21.Qh7 (21.fe5?! h6+=; 21.de5?! g6 22.Qh6 Rf7=; 21.Qe5?! Rf5 22.Qb8 Qf8=) 21...Kf7 22.Qh5 g6 23.Qe5+-) 20.de5 (20.Qh5 h6 21.Be2 Bc7+=) 20...Ra6 (20...ba6 21.Qh5 g6 22.Qh6=) 21.Qb3 Rf7 (21...Qf7 22.Rb1=) 22.Bd4 Qf8 23.Qd1 Bd7 (23...b5 24.cb6 c5 25.Bc3 Rb6 26.a5=) 24.a5 (24.Qh5 g6 25.Qe2 Qa8=) 24...Qd8 25.Bc3 Qf8 26.Bd4 (26.Qd4 Bc8+=) 26...Qd8+= 27.Qe1 (27.Qh5 g6 28.Qh4 Qc7+=) 27...Ra8 (27...Qa8 28.Bc3+=) 28.Qb4 (28.Qh4 Qh4 29.Rh4 h6+=) 28...Qc7 (28...Ra7 29.Bc3=) 29.g4 (29.Qb6 Qc8+=) 29...g6 (29...Ra6 30.g5=) 30.Rg3 (30.Qb6 Qc8+=) 30...Rg7 (30...g5 31.fg5 Be8 32.Rg2+=) 31.Rg2 (31.Qb6 Qc8+=) 31...Rf7 (31...g5 32.Qb6 Qb6 33.ab6 Ra1 34.Ba1+=) 32.Rb2 Attacking the backward pawn on b7 32...Bc8 33.Qe1 (33.g5 Ra6+=) 33...Qd8 (33...g5 34.fg5 Qe7 35.h4+=) 34.h4 (34.Rb6 g5 35.Qd2 gf4 36.ef4 Qh4=) 34...Qe8 35.Rh2 (35.Qg3 Rf8+=) 35...Rg7 (35...Ra6 36.h5 g5 37.fg5+=) 36.Rb2 (36.Rb1 Ra6=) 36...h6 (36...Rf7 37.Rab1=) 37.Rf2 (37.Qg3 Qf7+=) 37...Qe7 38.g5 (38.Rg2 Rf7+=) 38...h5 (38...Rh7 39.Qd2=) ½–½. Semenko,Georg(Jurko) (1750) – Antusch,Ingrid, 4sen.BayEM Schney, 1992.

7.0-0 Qe8 8.d4 Bd7 9.a4 c6 10.Qd3 (10.Ba3 Ne4 11.Qd3 cb5 12.ab5 a6 13.ba6 Na6 14.Bd6 Nd6+=) 10...c5 (10...cb5 11.ab5 a6 12.ba6 ba6 13.Nbd2+=) 11.dc5 Bc5 12.Nbd2 (12.c4 Qe7+=) 12...Bd6 (12...a6 13.Bd4 Ne4 14.Nb3+=) 13.c4 (13.Bf6 Rf6 14.c4 Qe7+-) 13...a6 (13...e5 14.Qb3+= (worse 14.cd5 e4 15.Qd4 Qh5=+)) 14.Bf6+- Rf6 15.cd5 e5 Black plans f4 16.e4 Qg6 17.g3 (17.Qe3 f4 18.Qc3 Bg4+-) 17...f4 (17...b6 A) 18.ba6?! Na6 (worse 18...Ra6 19.Qc3+-) 19.Nh4 Qf7+-; B) 18.Nh4 Qf7 19.Nf5+-) 18.Nc4 Bh3 19.Nd6 Rd6 20.ba6 (20.Ne5 Qf6 21.Nc4 Bf1 22.Rf1 Rd8+-) 20...Na6 (20...Rda6 21.Qc3 fg3 22.fg3 Ra4 23.Ra4 Ra4 A) 24.Qe5?! Nd7 25.Qc7 Qe4 (25...Bf1? 26.Qd7 h6 27.Qc8 Kh7 28.Bf1+-) 26.Qc8 Nf8 27.Qh3 Qe2+=; B) 24.Qc7+-) 21.Rfc1 (21.Rfb1 fg3 22.hg3 Re8+-) 21...fg3 (21...Qh5 22.Qc3 Bg4 23.Rab1+-) 22.hg3 (better 22.fg3 Re8 23.Rab1+-) 22...Bg4? (better 22...Qf6+-) 23.Ne5+- Be2 24.Qe2 Qf6 (24...Qg5 25.Nc4 Rh6 26.a5+-) 25.f4 Re8 (25...Qe7 26.Rab1+-) 26.Kg2 (better 26.Rab1+-) 26...Re5 (26...Qd8+-) 27.Rc8 (better 27.fe5 Qe5 28.Rc8 Kf7+-) 27...Kf7 28.fe5 Qe5 29.Rb1 Rd7 (29...b6 30.Rf1 Ke7+-) 30.Qf3 Qf6 (30...Kg6 31.Qg4 Kf7 32.Qd7 Kg6 33.Qg4 Kf6 34.Rb6 Ke7 35.Rb7 Nc7 36.Rbc7 Qc7 37.Qe6) 31.Qh5 Qg6 (31...g6 32.Qh7 Qg7 33.Rf1 Ke7 34.Qg7 Kd6 35.Qf6) 32.Rf1 (32.Rf1 Ke7 33.Qe5 Qe6 34.Qe6) 1–0. Marcus – 7118, internet, 2018.

7.0-0 Qe8 8.Be5 a6=.

7.0-0 g6 8.c4 c6 9.Nc3 Nbd7 (9...a6 10.a4+=) 10.Qc2 (10.d4 dc4 11.Bc4 Nb6+=) 10...Ne4 (10...e5 11.d4 e4 12.Ng5+=) 11.d3 Nc3 12.Qc3 Qf6 13.d4 Qg7 (13...cb5 14.c5 Be7 15.Bb5+-) 14.cd5 ed5 (14...cd5 15.Ba3 Qe7 16.Bd6 Qd6 17.Rfc1+-) 15.bc6+- Nf6 16.Ne5 Ne4 17.Qc1 bc6 18.f3 Be5 19.de5 Ng5 20.e6 (20.Qc6!? Bb7 21.Qd6 Rfd8+-) 20...Qc7+- 21.Qc3 Ne6 22.Qh8 Kf7 23.Qh7 Ke8 24.Qg6 Qf7 25.Qh6 Bd7 26.f4 Rg8?? (better 26...Qe7+-) 27.Bh5 1–0. Janek – Simus, internet, 2018.

7.c4 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.0-0 dc4 12.Bc4 Nb6 13.Qb3 Qe7 14.d3 Kh8 15.Be5 Ng4 16.d4 Bd7 17.Nbd2 Ne5 18.de5 Bb4 19.Ra1 Rd8 ½–½. Thau,Oliver – Leisebein,Peter, T16–01 corr TSC, 2002. (=1.Nf3 f5 2.b4 Nf6 3.Bb2 e6 4.b5 d5 5.e3 Bd6 6.Be2 0-0)

7.c4 c6 8.0-0 Ne4 (8...a6!?=) 9.d3+= Nf6 10.a4 (10.Nc3 Nbd7+=) 10...Qc7 (10...dc4 11.Na3 cd3 12.Qd3=) 11.Nbd2+= Ng4 (11...Nbd7 12.d4+=) 12.g3 Bd7 (12...Nd7 13.d4+-) 13.Qb3+- Be8 (13...Bc8 14.d4+-) 14.cd5 cd5 15.Rac1 Qe7 16.e4 fe4 (16...de4!? 17.de4 Nd7+-) 17.de4+- Bf7 18.h3 Nf6?? (better 18...e5 19.ed5 Nf6+-) 19.e5 Be5 (19...Re8 20.ed6 (worse 20.ef6 gf6 21.Nh2 f5+-) 20...Qd6 21.Be5+-) 20.Ne5 Qd6 (20...Qd8 21.Ba3 Re8 22.Bd3+-) 21.Nf7 Rf7 22.Rc8 Rf8 23.Ba3 Rc8 (23...Qa3 24.Qa3 Rc8+-) 24.Bd6 Nbd7 25.f4 Ne4 (25...Nc5 26.Bc5 Rc5+-) 26.Ne4 de4 27.Qe6 Kh8 28.Qd7 Rd8 29.Qb7 Rab8 (29...Rg8 30.Be5 a5 31.ba6 Rac8 32.Bg7 Rg7 33.Qc8 Rg8 34.Qc3 Rg7 35.Rd1 Kg8 36.Bc4 Kf8 37.Qf6 Rf7 38.Qf7) 30.Bb8 Rb8 (30...h6 31.Be5 Rg8 32.Bc4 Kh7 33.Bg8 Kg8 34.Qg7) 31.Qb8 1–0. DEFFM – GuestBPDX, freechess.org, 2019.

8.c4 a6 A) 9.Nc3 ab5 (9...Nb6 10.cd5 ed5 11.Qc2 Nc4 12.ba6 Ra6 13.Nd5 Nb2 14.Nf6 Rf6+-; 9...dc4 10.Bc4 Nb6 11.Be2 Nbd5 12.ba6 b6 13.Qa4 Nc3 14.Bc3 Ne4=; 9...f4 10.ba6 ba6 11.d4 fe3 12.fe3 Rb8 13.Rb1 c5 14.cd5 ed5=) 10.Nb5 Be7 11.Qc2 c6 12.Nbd4 Nb6 13.cd5 Nfd5 14.a4 Bd6=; B) 9.cd5 Nd5 (9...ed5 10.Nc3 f4 11.ba6 ba6 12.Rb1 Nb6 13.Qc2 Rb8 14.Na4 Ne4=) 10.Na3 b6 11.Qc2 Bb7 12.Rfc1 Nb4 13.Qb3 Bd5 14.Qc3 Rf6=; C) 9.Nd4 Nb6 (9...Nc5 10.f4 ab5 11.Nb5 b6 12.Nd6 cd6 13.Nc3 Bb7 14.Rc1 dc4=; 9...Qe7 10.f4 Nb6 11.cd5 e5 12.Ne6 Be6 13.fe5 Nbd5 14.ba6 ba6=; 9...Qe8 10.cd5 Nd5 11.f4 ab5 12.Nb5 b6 13.N1c3 Bb7 14.Bf3 Nc3=) 10.ba6 ba6 11.cd5 ed5 12.Qc2 f4 13.Nc6 Qe8 14.Bd4 Bd7+=; D) 9.ba6 ba6 (9...b6 10.a7 Ra7 11.Nd4 Nb8 12.Nb5 Ra8 13.Qc2 Nc6 14.Nd6 cd6=) 10.Qc2 Bb7 11.Nc3 Nb6 12.cd5 Nbd5 13.Rab1 Rb8 14.Nd5 Nd5=.

8.c4 dc4 A) 9.Qc2 Nb6 (9...Nd5 10.Na3 c3 11.dc3 Qf6 12.c4 Nb4 13.Qb3 Qg6 14.Rfd1 a5+=; 9...Qe7 10.Bc4 Nb6 11.Bb3 Nfd5 12.d3 a6 13.ba6 Ra6 14.Ne5 f4=; 9...a6 10.ba6 ba6 11.Na3 c3 12.Qc3 Nb6 13.d4 Rb8 14.Qa5 Bb7=) 10.Na3 Bd7 11.Nd4 e5 12.Bc4 Nc4 13.Qc4 Kh8 14.Ne6 Be6+=; B) 9.Na3 c3 (9...a6 10.Nc4 Be7 11.ba6 Ra6 12.d4 f4 13.Nce5 Ra8 14.Qb3 Nb6+=; 9...Be7 10.Nc4 a6 11.ba6 Ra6 12.d4 f4 13.Nce5 Ra8 14.Qb3 Nb6+=) 10.dc3 Nb6 11.Qb3 Ne4 12.c4 Qe7 13.Rfd1 Nc5 14.Qc2 e5=; C) 9.Bc4 Nb6 (9...Nd5 10.d3 N7b6 11.Nbd2 a6 12.a4 Nc4 13.Nc4 Bb4 14.Qb3 Qe7=; 9...Qe8 10.d4 Nb6 11.Bd3 Bd7 12.Nc3 c6 13.a4 Nbd5 14.Nd5 Nd5+=; 9...Qe7 10.d4 Nb6 11.Bd3 a6 12.Nc3 Nbd5 13.ba6 b6 14.Nd5 Nd5=) 10.Be2 Nbd5 11.Nc3 a6 12.ba6 b6 13.Qa4 Nc3 14.Bc3 Ne4=.

8.c4 c6 9.a4 Nc5 10.d3 Bd7 (10...dc4 11.dc4 Qc7 12.Nc3=) 11.Nbd2= a6 (11...cb5 12.ab5 dc4 13.Nc4 Bb5 14.Nd6 Qd6 15.d4 Be2 16.Qe2=) 12.Ne5 (12.d4 Nce4 13.c5 Bc7+=) 12...ab5 13.Nd7 Qd7 14.ab5 Ra1 (14...cb5 15.cb5 Ra1 16.Ba1=) 15.Qa1 cb5 16.Bf6 Rf6 17.cd5 (17.d4 Ne4 18.Ne4 fe4+=) 17...ed5=+ 18.Qa8 (18.Bf3 Nd3 19.Bd5 Kf8 20.Qa8 Qe8 21.Qe8 Ke8=) 18...Rf8 19.Qa2 Kh8 (19...Be7 20.Qa5 Ne6 21.d4=+) 20.g3=+ (20.Qd5?? Bh2 21.Kh2 Qd5-+) 20...Be7 21.Nf3 Bf6 (21...b4 22.Qa5=+) 22.Qa3 (22.d4 Ne4 23.Qb2 Nd6+=) 22...Rc8= 23.Rc1 ½–½. Mittelbachert,U (1975) – Delere,Adrian (1805), 45th Sparkassen Open, 2017.

8.c4 c6 9.d4 cb5 (9...dc4 10.bc6 bc6 11.Nbd2 c3 12.Bc3 Nd5 13.Bb2 Bb7 14.Nc4 Be7+=; 9...Ne4 10.c5 Bb8 11.bc6 bc6 12.Qa4 Qc7 13.Qc2 e5 14.Ne5 Nec5+=; 9...Qe7 10.c5 Bc7 11.bc6 bc6 12.Qa4 Bb7 13.Nbd2 e5 14.Ne5 Ne5+=) 10.c5 Bc7 11.Bb5 a6 12.Bd3 Ne4 13.Nbd2 Qf6 14.Qc2 b5+=.

8.c4 c6 9.Nd4 Nb8 (9...Nb6 10.cd5 cd5 11.f4 Bd7 12.Ba3 Ba3 13.Na3 Rc8 14.Rc1 Qe7=; 9...Ne5 10.cd5 cd5 11.f4 Ng6 12.Nc3 Qb6 13.Na4 Qa5 14.Bc3 Qd8+=; 9...Nc5 10.f4 cb5 11.cb5 a6 12.Nc3 ab5 13.Ndb5 Be7 14.Qc2 Bd7=) 10.cd5 (10.f4 a6 11.ba6 Na6 12.Nc3 Bc5 13.Na4 Bb4 14.a3 Be7=) 10...cd5 (10...Nd5 11.f4 a6 12.bc6 Nc6 13.Nc6 bc6 14.Qc2 Qb6=) 11.f4 Qe7 (11...a6 12.Nc3 Bd7 13.a4 ab5 14.ab5 Ra1+=) 12.d3 (12.Nc3 Bd7+= 13.Rc1 Rc8 14.Qa4 Na6=) 12...Nbd7 (12...e5 13.Nc2 ef4 14.ef4 Re8+=) 13.Nd2 Nc5 14.h3 (14.N2f3 Ng4=) 14...e5 15.fe5 Qe5 16.Rf3 Qh2 17.Kf2 Bg3?? (better is 17...Bd7 18.Qg1 Qg1 19.Rg1 a6=) 18.Rg3+- Nfe4 (18...Nce4 19.de4 fe4+-) 19.de4 fe4 20.N4f3! g6 21.Nf1 Qh1 22.Qd5 Be6 23.Qc5 ef3 24.Rf3 Rf3 25.Bf3 Rc8 26.Qc8! Bc8 27.Ng3 Qh2 28.Rh1 Qh1 29.Nh1 1–0. Osmak,Iulija (1975) – Khomeriki,N (1810), EYCC Girls U12, 2010.

8.c4 c6 9.cd5 ed5 (9...cd5 10.Ba3 Ba3 11.Na3 e5 12.d4 e4 13.Ng5 Qe7 14.Qb3 Nb6=; 9...Nd5 10.Na3 cb5 11.Nb5 Be7 12.Rc1 N7f6 13.d3 a6 14.Nbd4 Bd6=) 10.Nd4 Nc5 11.Qc2 f4 12.ef4 Qb6 13.a4 Ne6 14.Ne6 Be6=.

8.c4 e5 A) 9.c5 Bc5 (9...Nc5 10.Be5 a6 11.d4 Nce4 12.ba6 b6 13.Qa4 c5 14.Qc6 Bd7=) 10.Ne5 Qe7 11.Nd3 Bd6 12.f4 a6 13.Nc3 Re8 14.Rc1 Nb6=; B) 9.Ng5 Nb6 (9...Qe8 10.d4 c6 11.Nc3 Qg6 12.cd5 ed4 13.Qd4 Be5 14.Qh4 cd5+=; 9...Qe7 10.d4 c6 11.Nc3 Ng4 12.h4 ed4 13.Qd4 Bc5 14.Qd1 dc4=; 9...Re8 10.d4 h6 11.Nf3 e4 12.Nfd2 c6 13.Nc3 Qc7 14.h3 a6=) 10.c5 Bc5 11.Be5 Ng4 12.Bf4 Bd6 13.Bd6 Qd6 14.f4 Nf6=; C) 9.Qc2 Re8 (9...e4 10.Nd4 Ne5 11.c5 Be7 12.Nf5 Nf3 13.Bf3 Bf5 14.Be2 Qe8+=; 9...Qe8 10.Nc3 e4 11.Nd4 f4 12.ef4 Nb6 13.cd5 Bf4 14.Qb3 Qe5=; 9...a6 10.ba6 ba6 11.c5 Nc5 12.Be5 Rb8 13.Nc3 Nce4 14.d3 Nc3+=) 10.cd5 Nb6 11.d4 e4 12.Ne5 Nfd5 13.a4 Nb4 14.Qc1 Be6=; D) 9.d4 e4 10.Ng5 Ng4 11.h4 Ndf6 12.cd5 Nd5 13.Bg4 fg4 14.Qb3 Kh8=.

8.c4 f4 A) 9.ef4 dc4 (9...Bf4 10.Qc2 a6 11.Re1 ab5 12.cb5 Re8 13.d4 e5 14.Bc1 Bc1=) 10.Bc4 Nb6 11.Be2 Bf4 12.Qc2 a6 13.ba6 ba6 14.Re1 Bb7=; B) 9.d3 a6 (9...fe3 10.fe3 dc4 11.dc4 e5 12.Nc3 Nb6 13.Qb3 Be6 14.a4 Nbd7=; 9...dc4 10.dc4 fe3 11.fe3 e5 12.Nc3 Nb6 13.Qb3 Be6 14.a4 Nbd7=; 9...Qe7 10.d4 dc4 11.Bc4 Nb6 12.Bd3 fe3 13.fe3 Nbd5 14.Qe2 Bd7=) 10.Nc3 fe3 11.fe3 Qe7 12.a4 dc4 13.dc4 Nc5 14.a5 Bd7=; C) 9.Nc3 fe3 (9...Nb6 10.d3 dc4 11.dc4 fe3 12.fe3 Bc5 13.Qc1 Qd6 14.Nd1 Nbd7=; 9...dc4 10.Bc4 Nb6 11.Bd3 a6 12.Qc2 Qe7 13.ba6 fe3 14.fe3 ba6+=; 9...a6 10.ba6 ba6 11.Rb1 Rb8 12.ef4 c5 13.d4 Bf4 14.dc5 Nc5+=) 10.de3 Nb6 11.cd5 ed5 12.Qc2 Qe7 13.a4 Bg4 14.a5 Bf3=; D) 9.d4 dc4 (9...fe3 10.fe3 dc4 11.Nbd2 c3 12.Bc3 Nd5 13.Qb3 a6 14.Nc4 N7f6=) 10.Bc4 Nb6 11.Bd3 fe3 12.fe3 Nbd5 13.Qe2 Bd7 14.Ne5 Rc8=.

8.d4 A) 8...Ne4 A1) 9.Ba3 a6 (9...Qf6 10.Bd6 cd6 11.a4 f4 12.a5 Qg6 13.Qd3 fe3 14.fe3 Ndf6=; 9...f4 10.c4 fe3 11.fe3 Ndf6 12.Bd6 cd6 13.Qb3 Qa5 14.Bd3 dc4=; 9...Ba3 10.Na3 a6 11.ba6 b6 12.c4 Ba6 13.Qc2 c5 14.Rab1 Qf6=) 10.Bd6 cd6 11.ba6 ba6 12.Qd3 a5 13.Na3 Ba6 14.Nb5 Bb5=; A2) 9.a4 a6 (9...c6 10.Qd3 c5 11.c4 Nb6 12.Nbd2 Nd2 13.Nd2 cd4 14.Bd4 dc4+=; 9...Qf6 10.Ba3 Ba3 11.Ra3 c5 12.a5 c4 13.Re1 Rf7 14.Ra2 a6=; 9...c5 10.c4 Nb6 11.dc5 Bc5 12.Nbd2 Nd2 13.Nd2 Bb4 14.Bd4 f4+=) 10.Ba3 ab5 11.ab5 Nb6 12.Ne5 Nd7 13.f3 Nc3 14.Nc3 Ra3=; A3) 9.Nbd2 Qf6 (9...a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nb6 13.Ne5 Bd7 14.f3 Nd2=; 9...b6 10.c4 a6 11.Qc2 Bb7 12.a4 Ndf6 13.Ne4 fe4 14.Ne5 Qe7=; 9...Rb8 10.c4 Qf6 11.Qc2 c6 12.c5 Be7 13.a4 Qg6 14.Rfd1 Bd8+=) 10.c4 a6 11.Qb3 ab5 12.cd5 Nb6 13.de6 Be6 14.Qb5 Ba2=; A4) 9.c4 dc4 (9...Qf6 10.Qc2 dc4 11.Bc4 Nb6 12.Bd3 Nd5 13.Ba3 Ng5 14.Ng5 Qg5=; 9...f4 10.c5 fe3 11.cd6 ef2 12.Kh1 cd6 13.Nc3 Ndf6 14.Bd3 a6+=) 10.Bc4 Nb6 11.Bd3 a6 12.ba6 ba6 13.Nc3 Nc3 14.Bc3 Nd5=; B) 8...c5 B1) 9.dc5 Nc5 (9...Bc5 10.c4 dc4 11.Bc4 Nb6 12.Bb3 Bd6 13.Nc3 Qe7 14.Qd3 Kh8+=) 10.c4 Qe7 11.Nc3 dc4 12.Bc4 Nfd7 13.Rc1 Nb6 14.Qe2 Bd7=; B2) 9.bc6 bc6 10.Nbd2 Rb8 11.Rb1 Qa5 12.a3 Ba6 13.c4 Ne4 14.Ne4 fe4=; B3) 9.a4 f4 (9...Qc7 10.a5 c4 11.Ra4 a6 12.b6 Qc6 13.Ra2 Ne4 14.Qe1 f4=; 9...a6 10.c4 cd4 11.Bd4 Qc7 12.a5 e5 13.b6 Qb8 14.Bc3 Nc5=; 9...Qe7 10.a5 e5 11.de5 Ne5 12.Nbd2 Nf3 13.Nf3 Be6 14.a6 b6=) 10.dc5 Nc5 11.ef4 Bf4 12.Re1 Nce4 13.Bd3 Qc7 14.Qe2 Bd6=; B4) 9.c4 cd4 10.Qd4 e5 11.Qh4 Qe7 12.Rd1 e4 13.Ng5 h6 14.Nh3 Nb6=; C) 8...c6 C1) 9.a4 Ne4 (9...Qc7 10.c4 dc4 11.Na3 c3 12.Bc3 Nd5 13.Bb2 e5 14.bc6 bc6+/–; 9...Ng4 10.c4 Qc7 11.h3 Nh2 12.Nh2 Bh2 13.Kh1 Bd6 14.Nd2 f4+=; 9...c5 10.c4 cd4 11.Qd4 Nc5 12.Nbd2 Qe7 13.Rfd1 Ng4 14.h3 e5+=) 10.Qd3 c5 11.c4 Nb6 12.Nbd2 Nd2 13.Qd2 Nc4 14.Bc4 dc4=; C2) 9.c4 Ne4 (9...dc4 10.bc6 bc6 11.Nbd2 c3 12.Bc3 Nd5 13.Bb2 Bb7 14.Nc4 Be7+=; 9...cb5 10.c5 Bc7 11.Bb5 a6 12.Bd3 Ne4 13.Qe2 e5 14.Qc2 Qf6+=; 9...Be7 10.Ng5 Nb8 11.Ba3 a6 12.bc6 Nc6 13.Be7 Qe7 14.Qb3 Rd8+=) 10.c5 Be7 11.Nc3 e5 12.Qb3 Rf7 13.Rab1 Qc7 14.a4 Bf6=; D) 8...a6 D1) 9.Ba3 Ne4 (9...b6 10.Bd6 cd6 11.c4 Bb7 12.Qb3 Qe8 13.Rc1 Qg6 14.cd5 Bd5=; 9...Qe7 10.Bd6 Qd6 11.Nc3 Ne4 12.Qd3 c5 13.bc6 Qc6 14.Nb1 b5=; 9...Ba3 10.Na3 Qe7 11.Nb1 ab5 12.Bb5 Ne4 13.Be2 b6 14.c4 Ba6=) 10.Bd6 cd6 11.ba6 ba6 12.Qd3 a5 13.Na3 Ba6 14.Nb5 Bb5=; D2) 9.Na3 Qe7 (9...ab5 10.Nb5 Be7 11.c4 dc4 12.Bc4 Nd5 13.Qc2 N7b6 14.Be2 Na4=; 9...b6 10.c4 Bb7 11.ba6 Ba6 12.Nb5 Ne4 13.Qc2 c6 14.Nd6 Nd6=; 9...Ne4 10.c4 b6 11.Rc1 f4 12.Qb3 fe3 13.fe3 Ndf6 14.Bd3 Bb7=) 10.Qd3 e5 11.de5 Ne5 12.Ne5 Be5 13.Rfb1 f4 14.ef4 Bf4=; D3) 9.a4 ab5 (9...Ne4 10.Ba3 ab5 11.ab5 Rf7 12.Qd3 c5 13.c4 dc4 14.Qc4 Nb6=; 9...Qe7 10.c4 dc4 11.Nbd2 ab5 12.ab5 Ra1 13.Qa1 Nb6 14.Nc4 Nc4+=; 9...f4 10.ef4 ab5 11.ab5 Ra1 12.Ba1 Ne4 13.g3 Bb4 14.Bd3 c5+=) 10.ab5 Ra1 11.Ba1 Ne4 12.Nbd2 Nb6 13.Ne5 Bd7 14.Ne4 fe4=.

8.Nd4 A) 8...Nc5 A1) 9.Nf3 a6 (9...c6 10.a4 Qc7 11.Ba3 cb5 12.ab5 e5 13.d4 ed4 14.Qd4 Ne6=; 9...Ng4 10.d4 Ne4 11.c4 Rf6 12.h3 Ngf2 13.Rf2 Nf2 14.Kf2 f4+=; 9...Nfe4 10.c4 f4 11.d4 Nd7 12.c5 fe3 13.cd6 ef2 14.Kh1 cd6+=) 10.d4 Nce4 11.Ne5 ab5 12.f3 Ng5 13.Bb5 Bd7 14.Bd3 b5=; A2) 9.f4 Bd7 (9...Qe7 10.Nc3 Nce4 11.Nf3 a6 12.a4 Bb4 13.Ne4 fe4 14.Ne5 Bd7=; 9...a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Qe8 13.Nc3 Nce4 14.Nf3 Bd7=; 9...Nfe4 10.Nf3 a6 11.d3 Nf6 12.Nc3 Qe8 13.a4 ab5 14.ab5 Ra1=) 10.Nc3 Nfe4 11.Nf3 Qe8 12.Rb1 a6 13.ba6 Na6 14.Ne5 Nac5=; B) 8...Nb8 9.f4 Qe8 (9...a6 10.a4 c5 11.Nf3 b6 12.Na3 Nbd7 13.ba6 Ba6 14.Nb5 Qe7=; 9...c5 10.Nf3 Nbd7 11.a4 a6 12.Nc3 Qa5 13.Qe1 b6 14.ba6 Ba6=; 9...c6 10.Nc3 c5 11.Nf3 Nbd7 12.Qe1 Qe7 13.Qh4 e5 14.fe5 Ne5=) 10.Nc3 Qg6 11.a3 e5 12.fe5 Be5 13.Bd3 Qh6 14.Nf3 Bd6=; C) 8...Qe7 C1) 9.a4 f4 (9...Nc5 10.Nf3 a6 11.Ne5 ab5 12.ab5 Bd7 13.f4 Ra1 14.Ba1 Qe8=; 9...Ne4 10.d3 Nec5 11.Nf3 a6 12.Nc3 ab5 13.ab5 Ra1 14.Qa1 Nf6=; 9...a6 10.f4 ab5 11.ab5 Ra1 12.Ba1 Nc5 13.Nf3 Bd7 14.Ne5 Qe8=) 10.a5 fe3 11.fe3 Nc5 12.a6 ba6 13.Nc6 Qd7 14.d4 Nce4+=; C2) 9.Nc3 f4 (9...Nb6 10.f4 e5 11.fe5 Qe5 12.Nf3 Qe8 13.a4 Nc4 14.Bc4 dc4=; 9...Nc5 10.f4 Nce4 11.Nf3 a6 12.a4 Bb4 13.Ne4 fe4 14.Ne5 Bd7=; 9...Ne4 10.f4 Ndc5 11.Nf3 a6 12.a4 Bd7 13.Ne5 Nc3 14.Bc3 Ne4=) 10.Rb1 Nb6 11.Bd3 fe3 12.fe3 Rf7 13.a4 e5 14.Nf5 Bf5+=; C3) 9.f4 Nc5 (9...Nb6 10.Nf3 Ng4 11.a4 Bd7 12.Nc3 Bb4 13.a5 Nc4 14.Bc4 dc4+=; 9...a6 10.Nc3 Nc5 11.ba6 Na6 12.Ncb5 Bc5 13.Nb3 Bb6 14.a4 Bd7+=; 9...Nb8 10.Nc3 c5 11.bc6 Nc6 12.Ncb5 Nd4 13.Bd4 Bc5 14.Bc5 Qc5=) 10.Nc3 Nce4 11.Nf3 a6 12.a4 Bb4 13.Ne4 fe4 14.Ne5 Bd7=; D) 8...Nb6 D1) 9.Nf3 a6 (9...Nfd7 10.a4 e5 11.a5 e4 12.Nd4 Nc4 13.Bc4 dc4 14.Ne6 Qh4+/–; 9...c5 10.bc6 bc6 11.Be5 Rb8 12.a4 Be5 13.Ne5 Qd6 14.d4 Nbd7=; 9...c6 10.bc6 bc6 11.Be5 Rb8 12.d4 Ng4 13.Bd6 Qd6 14.Nbd2 Na4=) 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nfd7 13.Nd4 Qe7 14.f4 Nf6=; D2) 9.f4 Qe7 (9...Qe8 10.Ba3 Qg6 11.Rf3 Ng4 12.c3 e5 13.fe5 Ne5 14.Rf4 Qf6=; 9...Ne4 10.Nf3 a6 11.a4 Qe8 12.d3 Nc5 13.Nc3 ab5 14.ab5 Nca4=; 9...Na4 10.Ba3 Nc5 11.c4 a6 12.Qc2 dc4 13.Bc4 ab5 14.Nb5 Rf7=) 10.Nc3 e5 11.fe5 Qe5 12.Nf3 Qe8 13.a4 Nc4 14.Bc4 dc4=.

6.c4 a6 7.ba6 ba6 8.cd5 ed5 9.Qc2 Nc5 10.Bd4 +=.

6.c4 Nb6 7.cd5 Nbd5 8.Nc3 Bd6 9.Bc4 Nb6 10.Bb3 =.

6.c4 Nb6 7.cd5 Nbd5 8.Bc4=.

6.c4 Nc5 7.Nc3 Nce4 8.Be2 Bd6 9.0-0 0-0 10.d4 +=.

6.c4 Bd6 7.d4 dc4 8.Bc4 Nb6 9.Bd3 a6 10.ba6 =.

6.c4 Bd6 7.cd5 ed5 (worse 7...Nd5 8.Bg7 Rg8 9.Bb2+-) 8.Be2 0-0 9.0-0 Qe7 10.Qc2 Nb6 11.Nd4 f4 12.Bd3 Ne4 (12...fe3!? 13.fe3 Qe5=) 13.Nc3+= f3 (better 13...fe3 14.fe3 Nf6+=) 14.g3?? (better 14.Ne4 de4 15.Be4 fg2 16.Bg2+- (16.Bh7? Kh8 17.Kg2 Qh4-+)) 14...Ng5-/+ 15.Qb3 (15.e4 Bh3 16.Nd5 Nd5-+) 15...Qf7 16.h4 Nh3 17.Kh1 c6 (17...Nc4!? 18.Qc2 Nb2 19.Qb2 Qh5-+) 18.bc6=+ bc6 19.Ba3 (19.Rac1 c5 20.Ncb5 Be7=+) 19...Ba3 (better 19...c5!? 20.Ncb5 Be7-/+) 20.Qa3= Qd7? (20...Bd7 21.Rab1 Qh5-+) 21.Bh7!+- Kh7 22.Qf8 g6?? (better 22...c5 23.Qf3 cd4 24.ed4 Qd6+-) 23.Qf3+- 1–0. GuestPDRZ – GuestYCFM, freechess.org, 2019.

6.c4 Be7 7.d4 0-0 8.Ba3 a6 9.ba6 b6 10.Qb3 =.

6.c4 Be7 7.cd5 ed5 8.Bd3 (8.Qc2 Nc5=) 8...Nc5 9.Bc2 (9.Be2 a6=) 9...a6 (9...0-0 10.0-0=) 10.Nc3 (10.ba6 Ra6 11.0-0 0-0=) 10...ab5 11.Nb5 c6 (11...0-0 12.0-0=) 12.Nbd4 Nfe4 13.Nb3 (13.0-0 0-0=) 13...Ne6 (13...0-0 14.0-0=) 14.0-0 0-0 Black prepares f4 15.Ne5 (15.d3 Nf6=) 15...f4 16.f3 (16.Qb1 Nf6=) 16...Nf6=+ 17.Nd4 (17.Re1 Bd6=+) 17...Nd4 18.Bd4 c5 19.Bb2 (19.Bc3 fe3 20.de3 Ra3=+) 19...Qb6 20.Qb1 (20.Bc3 fe3 21.de3 Ra3=+) 20...Qb4 (20...fe3 21.de3 Bd6 22.a4=+) 21.Bc3 (21.e4 c4=) 21...Qb1=+ 22.Rfb1 Ne8 (22...fe3 23.de3 Bd6 24.f4=+) 23.Nd3 (23.ef4 Rf4 24.Re1 Bd6=) 23...fe3 24.de3 Ra3 25.Bb2 Ra7 (25...Ra6 26.Nf4 Nc7 27.Rd1=+) 26.Nf4= Nf6 (26...Nc7 27.Be5 g5 28.Bc7 gf4 29.Bf4 Rf4 30.ef4=) 27.Rd1+= Rd8 28.Rab1 (28.Bf6 Bf6 29.Rac1 Ra2 30.Nd5 Kf8+=) 28...Ra2 29.Bb3 Pawn d5, live or die! (29.Bf6 gf6 30.Nd5 Kf8 31.Bh7 c4+=) 29...Ra6= 30.e4 (30.Bf6 A) 30...Rf6? 31.Nd5 (31.Bd5?! Kf8=; 31.Rd5?! Kf8=) 31...Kf7 32.Nf6 Kf6 33.Bc4+-; B) 30...Bf6? 31.Nd5 (31.Bd5?! Kh8=; 31.Rd5?! Rd5 32.Bd5 Kf8+=) 31...Rd5 32.Rd5+-; C) 30...gf6 31.Rd5 Kf8=) 30...b5 (30...Kf8 31.e5 (worse 31.ed5 b5-/+) 31...Ne8 32.Nd5=) 31.Bf6+= gf6 (31...Bf6 32.Bd5 Kf8 33.Rb5+=) 32.Bd5 Kf8 33.Rb5 Bd6? (better 33...c4!?+-) 34.Nd3 (34.Bb7 c4 35.Ba6 Bc5 36.Rc5 Rd1 37.Kf2 Ba6+-) 34...Bd7 35.Rc5 Ba4 (35...Ra3 36.Rcc1+-) 36.Ra1 (36.Rdc1 Ke7 37.R5c3 Bb5+-) 36...Bb5 37.Ra6 (37.Rb5?! Ra1 38.Kf2 Bh2=) 37...Ba6 38.Rc3 Ke7 (38...Bd3 39.Rd3 Rc8 40.g3+-) 39.g3 Rb8 40.Kg2 Bd3 41.Rd3 Rb2 42.Kh3 h5 (42...Bc5 43.Rd1+-) 43.Rb3 Rb3 44.Bb3 Bc5 45.f4 Bg1 46.Kg2 Be3 (46...Bd4 47.h4+-) 47.h4 f5 (47...Kf8 48.Bd1 Kg7 49.Bh5 Bd4+-) 48.e5 (worse 48.ef5 Kf6+-) 48...Bd2 (48...Bc5 49.Bd1+-) 49.Bd1 Kf7 50.Bh5 Kg7 51.Be8 Be1 (51...Be3 52.Bd7+-) 52.h5 (better 52.Bd7!? Kg6+-) 52...Kh6 53.Bg6 Bb4 54.Kf3 Be1 55.Bf5 Kh5 56.g4 Kh6 57.g5 Kg7 58.Kg4 (58.Be4 Bd2+-) 58...Kf7 (58...Bc3 59.Bd7+-) 59.Bd3 (59.Bd7!? Bc3 60.e6 Kf8+-) 59...Bd2 (59...Bc3+-) 60.Bc4 (60.Bc4 Kf8 61.f5+-) 1–0. Kutynec,V (2310) – Simacek,P (2450), 26th Czech Open A, 2015. (=1.Nf3 f5 2.b4 Nf6 3.Bb2 e6 4.b5 d5 5.e3 Nbd7)

6.d4 a6 (6...Ne4 7.Bd3 a6 8.ba6 ba6 9.Nbd2 Bd6 10.Rb1=; 6...Nb6 7.a4 Ne4 8.a5 Nd7 9.c4 Bb4 10.Nbd2=; 6...c5 7.c4 Bd6 8.cd5 ed5 9.dc5 Nc5 10.Nc3=) 7.Nbd2 ab5 8.Bb5 Bd6 9.Ng5 Qe7 10.Qf3 -/+.

6.Be2 Bd6 7.0-0 e5 8.d4 e4 9.Ne5 Qe7 10.Nd7 =.

6.Be2 Bd6 7.d4 Qe7 8.c4 Bb4 (8...dc4 9.Bc4 0-0 10.0-0=) 9.Nfd2 0-0 10.a3 Ba5 11.0-0 c6 (11...a6 12.ba6 b6 13.Nb3+=) 12.Nc3 (12.bc6 bc6 13.Qa4 Bd2 14.Nd2 c5+-) 12...Bc7 13.Qc2 Bd6 14.c5 Bc7 15.Qa4 Nb8?? (better 15...cb5 16.Nb5 Bb8+=) 16.b6!+- Bd8 (16...ab6 17.Qa8 Pinning (17.Qa8 Deflection)) 17.Qa7! (17.ba7?! Nbd7+-) 17...Ra7 18.ba7 Bc7 19.a8Q e5 20.Qa4 e4 21.g3 h5 22.Nb3 h4 23.Rfe1 (23.Qa7 Nbd7+-) 23...f4 (23...hg3 24.fg3 Ng4 25.Bg4 fg4 26.Rf1+-) 24.ef4 g5 (24...Qf7 25.Rab1+-) 25.fg5 Ng4 26.Bg4 Bg4 27.f4 (27.Bc1 Qd7 28.Qa7 Bf3+-) 27...hg3 28.hg3 Bf4 (28...Qh7 29.Nd2 Qh3 30.Nce4 de4 31.Ne4 Be6+-) 29.gf4 Rf4 30.Bc1 Qg5 31.Bf4 Qf4 32.Ne4! de4 33.Qc4 Kg7 (33...Kf8 34.Qc2 Bf3 35.Qh2 Qg5 36.Kf2+-) 34.Qc2 Bf3 35.Qh2 Qg4 (35...Qh2 36.Kh2 Nd7 37.Nd2+-) 36.Kf2 (36.Kf2 Qf5 37.Rg1 (37.Qb8?! Bd1 38.Kg2 Qf3 39.Kg1 Qg4 40.Kh2 Qh5 41.Kg3 Qg4 42.Kh2 Qh5 43.Kg1 Qg4 44.Kf1 Qf3 45.Kg1 Qg4=) 37...Bg4 38.Ke1+-) 1–0. Adlai – Hpmefo, internet, 2019.

6.Be2 Be7 7.c4 c6 (7...dc4 8.Bc4 Nb6 9.Be2=) 8.Nd4 Nb6 (8...Nc5!?=) 9.bc6+- Nc4 10.Bc4 (10.cb7 Bb7 11.Ne6 Qd7 12.Ng7 Kf7 13.Bc4 dc4+-) 10...dc4 11.cb7 Bb7 12.Ne6 Qd6? (better 12...Qb8 13.Qa4 Kf7+=) 13.Ng7+- Kd7 (13...Kd8 14.Nf5 Qd5 15.Ne7 Qg2 16.Rf1 Ke7 17.Qc2+-) 14.Nf5 Qc6 (14...Qd5 15.Qa4 Qc6 A) 16.Ne7? Qa4 17.Bf6 Rhf8-+ (17...Bg2?! 18.Rg1 Rhf8 19.Rg2 Rf6 20.Rg7=+); B) 16.Qc6 Bc6 17.Ne7 Ke7 18.f3+-) 15.f3 (worse 15.Ne7 Qg2 16.Qa4 Ke7 17.Qb4 Ke6 18.Qc4 Nd5+-) 15...Rhg8 16.0-0 Rg5 (16...Nd5 17.Ne7 Ke7 18.Bd4+-) 17.Ne7 Ke7 18.Nc3 Rag8 19.g3 (19.Rf2 Bc8+-) 19...h5 20.Ba3 (20.e4 h4 21.g4 Ng4+-) 20...Kf7 (20...Ke8 21.Rb1+-) 21.e4 h4 22.g4 h3 (22...Ke8 23.d3 cd3 24.Qd3+-) 23.Rb1 Ba8 (23...Ke8 24.Nd5! Nd5 25.ed5 Qd5 26.Re1 Kf7 27.Re7 Kf6 28.Qe2+- (28.Rbb7?? Rg4 29.Kf2 Qd4 30.Re3 Rg2 31.Ke1 Rg1 32.Ke2 R8g2; 28.Reb7?? Rg4 29.Kf2 Qd4 30.Ke2 Rg2 31.Ke1 Qf2)) 24.d4 cd3 25.Qd3 Kg7 26.Qd4 Kh7 (26...Qa6 27.Bc1 Ra5 28.g5+-) 27.Qa7 R8g7 28.Qe3 Ng4 (28...Nd7 29.Rb3+-) 29.fg4 Rg4 30.Kf2 Rg2 (30...Qf6 31.Ke2 Rg2 32.Kd3 Rd7 33.Nd5 Qa6 34.Kd4+-) 31.Ke1 Rh2 (31...Qe6+-) 32.Rb6 Qc7 33.Qh6 Kg8 34.Rf8 1–0. GuestKFSK – GuestNHSD, freechess.org, 2019.

6.a4 0-0 7.c4 c6 8.Nc3 a6 9.Be2 ab5 10.ab5 Ra1 11.Qa1 Nbd7 12.0-0 Nc5 13.bc6 bc6 14.d4 Nce4 15.Ne5 Bd7 (15...Bb7!?+-) 16.Ne4 fe4 17.Ba3 Be8 18.Qb2 Qc7 (18...Ba3 19.Qa3 dc4 20.Bc4+-) 19.Be7 Qe7 20.c5 Qc7 21.Qb6 Qb6? (21...Qe7+-) 22.cb6 Bd7 23.Bg4 Ng4 24.Nd7 (24.Nd7 Re8 25.b7+-; 24.Ng4?! Rb8+=) 1–0. Pierre – Roccho, internet, 2019.

6.a4 0-0 7.c4 Ne4 8.cd5 ed5 9.Qb3 Be6 10.Be2 Bh4 (10...Nd7 11.0-0=) 11.Nh4 Qh4 12.0-0 Nd7 13.f3 Ng5 (better 13...Nef6!?+=) 14.Qc3+/- Nf6 15.Qc7 b6 (15...Rf7 16.Qf4 Qh5 17.h4+-) 16.a5 Rf7? (better 16...Nd7+-) 17.Qf4 Qf4 18.ef4 (18.ef4 Nh3 19.gh3+-) 1-0. DEFFM – GuestLHLC, freechess.org, 2021.

6.a4 Nbd7 7.c4 (7.Be2 Bd6=) 7...0-0 8.Nc3 c6 9.Be2 Re8 (9...dc4 10.Bc4 Nb6 11.Be2=) 10.d4+= Bb4 (10...dc4 11.bc6 bc6 12.Bc4+=) 11.Qb3 Bc3 (11...Qe7 12.Ba3 Ba3 13.Qa3 Qa3 14.Ra3+=) 12.Bc3+- Ne4 13.0-0 Nc3 (13...Qf6 14.Rfc1+-) 14.Qc3 Nf6 (14...Qf6 15.Rfd1+-) 15.Rfc1 (15.Qc2 Rf8+-) 15...Bd7 (15...Ne4 16.Qc2+-) 16.Ne5 Rc8 (16...Ne4 17.Qb2+-) 17.c5 Qe7 (17...Rf8 18.Rab1+-) 18.Rab1 (18.Qa5 Ra8+-) 18...cb5 (18...Qd8 19.b6 Ra8 20.a5+-) 19.ab5 Rc7 (19...Ra8 20.c6 Bc8 21.Qa5+-) 20.Qa5 Rec8 (20...b6 21.cb6 Rc1 22.Rc1 ab6 23.Qb6 Ra8+-) 21.Qa7 (21.Qa7 Qe8 22.b6+-) 1–0. michaelbuss (2795) – rasakrida (1930), ChessWorld.net, 2011.

6.c4 0-0 7.d4 c6 8.a4 Ne4 9.Nbd2 Bb4 10.Rc1? (10.Bd3!?=+) 10...Qa5 (10...f4 11.Rc2 fe3 12.fe3 a6-/+) 11.bc6? (11.Bd3 Nd7 12.bc6 bc6-/+) 11...bc6 (11...Nc6 12.cd5 ed5 13.Bd3-+) 12.Ra1 (12.Bd3 Ba6 13.Qe2 Re8-/+) 12...Nd7 (12...f4 13.Bc1 fe3 14.fe3-+) 13.cd5 (13.Ba3 Ba3 14.Ra3 Ba6-/+) 13...ed5 (13...Ndf6 14.Bd3 (14.dc6? Ng4-+) 14...Nd5 15.Bc1-/+) 14.Bd3 (14.Ba3 Rb8 15.Bb4 Rb4-/+) 14...Bd2 (better 14...f4!? 15.Ba3 fe3 16.Bb4 ef2 (16...Qb4?! 17.fe3 Qc3 18.Ke2=+; 16...ed2?! 17.Bd2 Nd2 18.Qd2 Re8 19.Kd1=) 17.Kf1 Qb4 18.Be4 de4 19.Ne4 Qb2 20.Nf2 Rb8-+) 15.Nd2-/+ Nd2?? (better 15...Rb8 16.Rb1 Ba6 17.Ba6 Qa6 18.Ne4 fe4-/+) 16.Qd2+- Qd2 17.Kd2 Nf6 (17...a5 18.Ba3 Rf6 19.Rhb1+-) 18.Rab1 (18.Ba3!? Re8 19.f3+-) 18...Ne4+- 19.Ke2 Rb8 (19...Re8 20.Rhc1 f4 21.Rc6 fe3 22.fe3+- (22.Ke3? Nc5 23.Kd2 Nd3 24.Rc8 Rac8 25.Kd3 Rb8-+)) 20.f3 Nf6 (better 20...Rb3!? 21.Rhc1 Rf6+-) 21.Ba3+- Rb1 22.Rb1 (22.Bb1?! Rf7+-) 22...Re8 23.Bd6 (23.Kf2 g6+-) 23...Kf7 24.h3 (24.Kd2 g5+-) 24...Nh5 (24...Re6 25.Bh2+-) 25.g4 fg4 26.hg4 Nf6 27.g5 Nd7 28.Rc1 (28.Bh7?! g6 29.Rc1 Kg7 30.Rc6 Kh7=) 28...Bb7 29.Bh7?? (better 29.Rh1+-) 29...g6= 30.Rh1 Kg7 31.Bg6 (31.Rh6 Ba6 32.Kd2 Rh8 33.Rg6 Kh7 34.Rh6 Kg7+=) 31...Kg6=+ 32.f4 c5 (32...Ba6 33.Kd2=+) 33.Bc5 (33.dc5 a5=) 33...Nc5=+ 34.dc5 d4 35.Rh3 (35.Rh6 Kf5 36.Rf6 Kg4 37.c6 Ba6 38.Ke1=+) 35...Ba6 (35...Bc8!? 36.Rg3 Bf5-/+) 36.Kf2 (better 36.Kd1 Bc8 37.Rh6 Kf5 38.Rf6 Ke4 39.ed4 Kd4 40.c6=) 36...d3?? (better 36...Kf5=) 37.Rh6+- Kf5 (37...Kf7 38.Ra6 Re7+-) 38.Kf3 Bb7 39.c6 d2 (39...Re3 40.Ke3 Kg4 41.cb7 d2 42.Kd2 Kf3 43.b8Q Ke4 44.Ke2 Kf5 45.Kf3 a6 46.Qe5) 40.Rf6 1–0. Bonetti,Shane – Duetrestaurant, ICC, 2002.

6.c4 c5 7.cd5 Qd5 (7...ed5 8.Be2=) 8.Nc3+= Qd7 9.Ne5 (9.Bc4 Bd6+=) 9...Qc7= 10.f4 Nbd7 11.Nc4 Nb6 12.Ne5 Bd6 13.Na4 Be5 (13...0-0 14.Nb6 Qb6 15.Nc4+=) 14.Be5 Qd7 (better 14...Qe7!?+=) 15.Nc5+- Qd5 16.Bf6 gf6 17.Qh5 Ke7 18.Rc1 Nc4?? (better 18...Nd7 19.Qh6 Rf8 20.Nd7 Bd7 21.Qh7 Rf7+-) 19.Rc4 (19.Bc4?! Qc5 20.Qh6 Ke8+-) 19…Qd2 1-0. DEFFM – GuestBBPP, freechess.org, 2021.

6.d4 c6 7.c4 0-0 8.a4 a6 9.Bd3 ab5 10.ab5 Ra1 11.Ba1 Bb4 (11...dc4!? 12.Bc4 Nd5=) 12.Bc3+= Bc3 13.Nc3 Ne4 14.Be4 fe4 15.Nd2 (15.Ne5 Nd7 16.Nd7 Bd7=) 15…Nd7 (16.0-0 Qg5=; 15...Qg5 16.0-0=). Lach (2000) – Adamowski (2000), corr 1. AMM Poland, 1991.

6.Be2 a6 7.a4 =.

6.Be2 Ne4 7.d3+= (worse is 7.Bg7 Rg8 8.Bd4 Rg2+=) 7...Bf6 (7...Nd6 8.0-0+=) 8.c3 (8.Bd4 Nd6+=) 8...Nd6= 9.a4 (9.d4 a6=) 9...a6 10.Qb3 ab5 11.ab5 Ra1 12.Ba1 Bd7 (12...Nd7 13.0-0=) 13.d4 0-0 (13...c6 14.bc6 Nc6 15.Nbd2=) 14.0-0 (14.Nbd2 c6=) 14...Qe8 Will b5 fall? (14...c6 15.bc6 Nc6 16.Na3=) 15.Na3 Bc8 (15...Qg6 16.Bb2=) 16.Nd2 (16.Rb1 Nd7+=) 16...Kh8 (16...Ne4 17.Ne4 fe4 18.c4+=) 17.c4+= dc4 (17...Qf7 18.Bb2+=) 18.Ndc4 Nd7 19.Nd6 (19.Rc1 Ne4+=) 19...cd6 20.Bb2 (20.Rc1 Qe7+=) 20...e5 (20...Qe7 21.Bd3+=) 21.Qd5 Be7 Black plans f4 (21...ed4 22.Bd4 Bd4 23.Qd4+=) 22.de5+/– de5 23.Ra1 (23.Nc4 e4+/–) 23...f4 (23...e4 24.Nc4+=) 24.ef4 (24.Nc4 fe3 25.Ne3 Bc5+=) 24...ef4 (24...Rf4 25.Nc4 Nf6 26.Qd1= (26.Qe5? Re4-+)) 25.Bf1 (25.Qf3!?+=) 25...Bf6 (25...f3 26.Re1 fg2 27.Bd3+=) ½–½. Bittner – Haeusler, VM, 1988.

6.Ne5 Nbd7 7.a4 0-0 8.c4 (8.Nd7 Nd7 9.Be2 f4=) 8...Bd6 9.Nf3 Re8 (9...c5 10.d4+=) 10.Be2 c6 11.0-0 c5 (11...e5 12.cd5 cd5 13.Nc3=) 12.Nc3 Ne4 (12...Qc7!?=) 13.cd5+/– Nc3 14.Bc3 (14.dc3 Nb6+/–) 14...e5 (14...ed5!? 15.d3 Kh8=) 15.d3 Nf6 16.d4 (16.Qb3 Bb8+=) 16...e4 (16...cd4 17.ed4 e4 18.Ne5 Nd5 19.Bc4+=) 17.Nd2 (17.Ng5 cd4 18.Qd4 Qc7+=) 17...Nd5= 18.Bb2 cd4 19.Bd4 Be5 (19...Qh4 20.g3 Qh6 21.Nc4=) 20.Nb3 Nc3 (20...Qd6!? 21.Be5 Re5+=) 21.Bc4+/– Kh8 (21...Be6 22.Be6 Re6 23.Qd2 Bh2 24.Kh2 Rh6 25.Kg1-+) 22.Qc2 (22.Qd2 Nd5 23.Be5 Re5+-) 22...Bd4 (22...Nd5 23.Rfd1 Qc7 24.Be5 Re5 25.Rac1+/–) 23.Nd4 (23.ed4?! Nd5=) 23...Nd5 24.Qb3 (24.Rfd1 Nb4 25.Qb3 Qe7+-) 24...Nb6 25.Be2 (25.Bf7 Re5+/–) 25...f4+= 26.Rad1 Qg5 27.ef4 Qf4 28.a5 Nd7 29.g3 (29.Qe3 Qc7+/–) 29...Qe5+= 30.Bc4 Nc5 31.Qe3 Bh3 32.Rfe1 Bg4 33.Rd2 Qh5 34.Bf1 Rad8 35.Ne2?? (35.Rc1!?=) 35...Rd2?? (better is 35...Rd3!? 36.Qf4 Ne6 37.Qe4 Rd2 38.Nf4-+) 36.Qd2? Nd3-+ 37.Rd1?? Qh6 38.Qh6+= gh6 39.Rd2 Ne5 40.Nc3?? (better is 40.Rd5+=) 40…Nf3-+ (40...Nf3 41.Kg2 Nd2-+) 0–1. Schelze – Meybohm, Simultanpartie, 1986.

6.h3 0-0 7.c4 c6 8.Qc2 a6 9.cd5 ed5 (9...Nd5 10.a4+=) 10.ba6 (10.bc6 Nc6 11.Be2 Be6+=) 10...Na6+= 11.Be2 Kh8 (11...Nb4 12.Qb3+=) 12.0-0 Be6 13.Nd4 White is in command 13...Qd7 14.Nc3 Ne4 15.a3 Bf6 16.Na4 Rae8 (16...Qe7 17.d3 Nd6 18.Ne6 Qe6 19.d4=) 17.Ba6 (worse is 17.Ne6 A) worse is 17...Re6 18.Ba6 Bb2 19.Qb2 (worse is 19.Nb2 ba6 20.Na4 Re7+=) 19...ba6 20.d3+/–; B) 17...Qe6 18.d3 Nd6=) 17...Bd4 (17...ba6 18.d3 Bd4 19.Bd4 Nf6+/–) 18.Bd4+/– ba6 19.d3 Nf6 20.Nc5 Qc8 21.Qa4 f4 22.ef4 Bh3 (22...Nh5+/–) 23.f3 (23.gh3 Qh3 24.Rfd1 Qg4 25.Kf1 Qh3 26.Kg1 Qg4 27.Kf1 Qh3 28.Kg1=) 23...Bg2 (better is 23...Bf5!?+=) 24.Kg2+/– Nh5 (24...Qf5 25.Qa6 (25.Qc6?! Qg6 26.Kh1 Qh5 27.Kg1 Qg6 28.Kh1 Qh5 29.Kg1 Qg6 30.Kh1=) 25...Qf4 26.Bf2+/–) 25.Be5+- Qf5 (25...Qf5 26.Qc6 Rc8+-). Dobosz,Roman (2000) – Adamowski,Andrzej (2000), corr 1.AMM Poland, 1991.

7.Nc3 0-0 8.Be2 a6 9.a4 ab5 10.ab5 Ra1 11.Qa1 Nbd7 12.0-0 Qc7 (12...dc4 13.bc6 bc6 14.Nd4+=) 13.d4+= c5 14.cd5 Nd5 (14...ed5!? 15.dc5 Nc5+=) 15.Nd5+- ed5 16.dc5 Bc5 (16...Nf6!?+-) 17.Bg7+- Rf7 18.Bd4 b6 19.Rc1 Bb7 20.Ng5 (20.Bd3 Qd8+-) 20...Re7 21.Qb1 Re4? (better 21...f4+-) 22.Ne4 fe4 23.Ba1 Kf7 (23...Ne5 24.Qb2 Ng6 25.Bh5+-) 24.Qb2 Ke6 (24...Qd6 25.Bh5 Ke7+-) 25.Qg7 (better 25.Bg4 Kd6 26.Qh8+-) 25...Ne5 (25...Qd8 26.Qg4 Kf7 27.Qf5 Kg8 28.Qe6 Kf8 29.Qh6 Ke7 30.Qh4 Kd6 31.Qd8 h5 32.Bh5 d4+-) 26.Qc7 Kf5 27.Qe5 Kg6 28.Qf6 1–0. Guestcello – Hpipsub, internet, 2019.

7.d4 a6 8.bc6 Nc6 9.Nbd2 0-0 10.Be2 Bd7 (10...dc4 11.a4=) 11.Rc1 Rc8 12.0-0 Ne4 13.Ne4 de4 (13...fe4 14.Ne5 Ne5 15.de5=) 14.Nd2+= Bd6 15.f4 Nb4 16.Qb3 a5 17.Ba1 (17.c5 Bc7+=) 17...a4 (17...b6 18.a3 Nc6 19.Rfd1+=) 18.Qb2 a3 (18...Be7 19.a3 Nd3 20.Bd3 ed3 21.Rc3+=) 19.Qb1 (19.Qa3?! Ra8 20.Qb3 Na2= (20...Ra2? 21.Bc3 Ba4 22.Qb1+-)) 19...Bc6 20.Rc3 Qa5 21.Rb3 Ba4? (better is 21...Nd3!? 22.Bc3 Qa4+/–) 22.Bc3+- (22.Ra3?! Nd3 23.Bc3 Qa7+/–) 22...Bb3 23.Qb3 b5? (23...b6+-) 24.c5 (24.cb5?! Rc3 25.Qc3 Qa8+/–) 24...Qa4 25.Qb4 Qb4 26.Bb4 Ra8 (26...Bc7+-) 27.cd6 (27.cd6 Rfb8 28.Rb1+-) 1–0. Cetwinski,Olgierd (2210) – Adamowski,Andrzej (1855), corr Poland–ch42/43 sf3, 1998.

8.d4 Ne4 9.Ba3 Qa5 10.Nbd2 Nd2 11.Nd2 Ba3 12.Ra3 Nd7 (12...cb5 13.cb5 Qb4 14.Qb3+=) 13.Bd3 (13.Qb3 Nb6=) 13...Nf6 (13...cb5 14.cb5 Qb4 15.Qb3+=) 14.0-0+= Bd7 15.bc6 bc6 16.c5 (16.Nf3 c5+=) 16...Rfb8 (16...e5 17.de5 Ng4 18.Nf3=) 17.Qc2 Ne4 18.Nb3 (18.Be4 fe4 19.f3 ef3 20.Nf3 Rf8+/–) 18...Qc7 19.f3 Nf6 20.Rb1 g6 21.Nd2 (21.Qf2 e5+=) 21...Rb1+= 22.Nb1 Rb8 (22...e5 23.Nc3+=) 23.Nc3 (23.Qc3 f4 24.e4 a6+=) 23...e5 24.Nb5?? (better is 24.Rb3+=) 24...cb5-+ 25.de5 (25.ab5 e4 26.Be2 Bb5-+) 25...Qe5 (better is 25...b4!? 26.Rb3 Qe5 27.Bb5 Bb5 28.ab5 Rb5 29.Qd2-+) 26.Bb5 Bb5 27.ab5 Rb5 28.Ra7 (28.c6 f4 29.c7 Rb1 30.Qb1 Qc7 31.Ra6+/–) 28...Qe3 29.Kf1 Rc5 30.Ra8 Kg7 31.Ra7 Kh6 (31...Kh6 32.Re7 Qe7 33.Qd2 Kg7-+) 0–1. Frysiak,Adam (1800) – Adamowski,Andrzej (2000), corr 1.AMM Poland, 1991.

8.cd5 ed5 9.Be2 a6 10.0-0 Kh8 11.Na3 (11.Nc3 Qd6=) 11...Be6 (11...ab5 12.ab5 Bd6 13.Qb3=) 12.Nd4 Qc8 13.Rc1 ab5 14.Nab5 Na6 (14...cb5 A pinning theme 15.Rc8) 15.Ne6 Qe6 16.Nd4 Qd7 17.Ra1 Ne4 18.g3 (18.d3 Nf6+=) 18...Bf6 19.Rb1 (19.f3 Nd6 20.Rc1 c5 21.Ba6 cd4+=) 19...Nac5+= 20.f3 Ng5 (20...Nd6 21.Ra1+=) 21.Ba3= Be7 22.Qc2 Na4 23.Be7 Qe7 24.h4 (24.Nf5 Qf6 25.e4 Qe6 26.Rb7 Rf5 27.Qa4 Nf3 28.Rf3 Ra4 29.Rb8 Qg8 30.Rg8 Kg8 31.ef5 Ra2+-) 24...Qd6 (24...c5 25.Nf5 Qe5 26.hg5 Qf5 27.Qf5 Rf5 28.Rb7+/–) 25.Kg2= Ne6 26.Nf5 (26.Ne6 Qe6 27.Rb7 c5=) 26...Qe5+= 27.g4 ½–½. Mostowik,Daniel (2000) – Adamowski,Andrzej (2000), corr 1.AMM Poland, 1991.

8.cd5 Nd5 9.Nc3 =.

7.0-0 a6 8.a4 c6 9.c4 (9.Ba3 b6=) 9...Ne4 (9...dc4 10.bc6 Nc6 11.Bc4=) 10.d3+= Nf6 11.Nc3 Bb4 12.Qb3 Bc3 (12...Qa5 13.Rfc1+=) 13.Qc3+- ab5 (13...b6 14.Rfb1+-) 14.ab5 Ra1 15.Ra1 cb5 16.cb5 Bd7 (16...Nbd7+-) 17.Ra8 (better 17.Qe5!?+-) 17...Bb5+= 18.Qb4 Bc6 19.Be5 Nfd7 20.Bd6 Re8 21.Nd4 Qf6 22.Nc6 bc6 23.d4 (23.Bb8?! Qd8=) 23...f4 (23...Qd8 24.Bh5 g6 25.Be2+-) 24.Bf4 (24.Bb8?! fe3 25.fe3 Qd8+=) 24...Rc8 (better 24...Rf8!?+-) 25.Rb8+- Nb8 26.Bb8 Qf7 27.Bd3 Rf8 28.f3 g5 (28...Rd8 29.Be5+-) 29.Be5 Ra8 (29...Qd7 30.e4+-) 30.Qd6 Ra1 (30...Rc8 31.Ba6 Rf8 32.Qc6+-) 31.Kf2 Ra8 (31...Ra2 32.Kg3 Ra8 33.Qc6+-) 32.Qc6 Rf8 33.f4 (33.e4 de4 34.Qe4 h6+-) 33...gf4 34.ef4 h5 (34...Qe8 35.Qe8 Re8 36.g4+-) 35.Kg3 Re8 (35...Qe7 36.Kh3 Rd8 37.f5+-) 36.Qc2 Kf8 (36...Rf8 37.Bg6 h4 38.Kh4 Qe7 39.Kg4+-) 37.Bg6 Qg8 (37...Qd7 38.Qe2 h4 39.Kh3 Re7+-) 38.Qc5 Re7 39.Qc8 (39.Qc8 Re8 40.Qe8) 1–0. DEFFM – GuestHLMR, freechess.org, 2018.

7.0-0 c6 8.a4 Nbd7 9.c4 Qe8 10.Nc3 Ne4 11.d3 Nc3 12.Bc3 Bf6 (12...dc4 13.dc4 Nf6 14.Ne5+=) 13.Qc2 (13.Bf6 Rf6 14.d4 f4+-) 13...e5+= 14.cd5 cd5 15.Rfc1 e4 16.Nd2 Ne5 17.d4 Ng6 18.Bb4 Rf7 19.g3 (19.Bh5 f4+=) 19...Be6 20.Ra3 Rc8 21.Rc3 Rc3 22.Qc3 h5? (better 22...Bd7!?+=) 23.Bh5+- Kh7 24.h4 Kh6 (24...Bd8 25.Bd6+-) 25.Be2+- Nh4? (better 25...Kh7!?+-) 26.gh4 Bh4 27.Bd6 Rf6 (27...Qd8 28.Bf4 Bg5 29.Bc7+-) 28.Nf1 (28.Bf4 Kh7+-) 28...Rg6 (28...Kh7 29.Ng3+-) 29.Ng3 Qf7 (29...Be7 30.Qc7 Bd6 31.Qd6+-) 30.Bf4 Bg5 (30...Kh7 31.Qc7 b6 32.Qf7 Bf7 33.Rc7+-) 31.Kg2 Bf4 32.ef4 Kh7 33.Bh5 Rg3 (33...Qf6 34.Bg6 Kg6 35.Qc7 Qd4 36.Qb7+-) 34.fg3 (34.Kg3?! Qh5 35.Kg2 Kg8+-) 34...Qh5 (34...Qe7 35.Be2 Kg6 36.Qc7+-) 35.Rh1 (35.Rh1 Qh1 36.Kh1+-) 1–0. Hidalgo – Gsbnba, internet, 2019.

7.0-0 c6 8.a4 Qe8 9.c4 h6 (9...Nbd7 10.Nc3+=) 10.d3 (10.Nc3 Nbd7+/–) 10...Nbd7+= 11.bc6 (11.Nc3 dc4 12.d4 Nb6+=) 11...bc6= 12.Nd4 (12.Nc3 Rb8 13.Rb1 Ba6=) 12...Nb8 (12...Nc5 13.Nd2=) 13.Nd2 e5 (13...Na6 14.Rb1=) 14.N4f3+= e4 (14...Bd6 15.d4 Nbd7 16.de5 Ne5 17.cd5 cd5 18.Ne5 Be5 19.Be5 Qe5 20.Nf3+=) 15.Ne5+/– Bd6 16.d4 Be5? (better is 16...Na6!?+/–) 17.de5+- Ng4 (17...Nfd7 18.cd5 cd5 19.Nb3+-) 18.Bg4 (18.cd5 Ne5 19.Qb3 Rf7+-) 18...fg4 19.cd5 cd5 20.Ne4! de4 (20...Qe6 21.Nc5 Qf7 22.f3+-) 21.Qd5 Qf7 (21...Qe6 22.Qa8 Nc6 23.Ba3+-) 22.Qa8 Ba6 23.Qe4 (better is 23.Ba3!? Re8 24.Rfb1 Nd7 25.Qa7 Bc8+-) 23...Bf1 24.Rf1 h5 (24...Qe6+-) 25.e6 Qe7 26.Rd1 (better is 26.Ba3 Qa3 27.e7+-) 26...Qh4 (26...Rd8 27.Rd8 Qd8+-) 27.Rd2 (better is 27.g3 Qg5 28.Rd5 Qh6+-) 27...Qg5 (27...Qe7 28.Qg6 Rc8+-) 28.Rd5 Rd8 29.Rd8 (29.e7 Qd5 30.Qd5 Rd5 31.e8Q Kh7 32.Qe4 Kh6 33.Qd5 g3 34.Qd6 Kh7 35.Qg3 g6 36.Qe5 Kh6 37.f4 Nc6 38.Qg7) 29...Qd8 30.Bd4 Qa5 31.g3 Qa4 32.e7 (better is 32.h4 Qd1 33.Kg2 Qf3 34.Qf3 gf3 35.Kf3+-) 32...Kf7 (32...Qd1 33.Kg2 Qf3 34.Qf3 gf3 35.Kf3+-) 33.h4 (better is 33.Qf4 Ke7 34.Bc5 (34.Qb8?! Qd1 35.Kg2 Qf3 36.Kg1 Qd1 37.Kg2 Qf3 38.Kg1 Qd1=) 34...Kd7 35.Qa4 (35.Qb8?! Qd1 36.Kg2 Qf3 37.Kg1 Qd1 38.Kg2 Qf3 39.Kg1 Qd1=) 35...Nc6 36.Qf4+-) 33...Qa6 (33...Qe8 34.Qe5 Nd7 35.Qg7 Ke6+-) 34.Qf4 (34.e8Q) 34...Ke7+- 1–0. Melderis,Uldis (2035) – Rybalov,Daniil, 2rd Bulgarian Albena, 2010.

7.0-0 Nbd7 8.d4 c5 9.c4 cd4 10.ed4 dc4 11.Bc4 Nb6 12.Bb3 (12.Bd3 Nbd5=) 12...Kh8 (12...Nbd5!?=) 13.Ne5 Ne4 (13...Nbd5 14.Nc3+=) 14.Nd2 Nd2 15.Qd2 Nd5 16.Qd1 Qb6 (16...a6 17.Qh5 Qe8 18.Qe8 Re8 19.a4+=) 17.a4+- a6 18.Bc4 a5 (18...ab5 19.Bb5 Kg8 20.Qd2+=) 19.Qh5 Kg8 20.Rac1 Bb4 21.Bb3 Qd6 22.Rc2 Ba3? (better 22...Bd7+-) 23.Nc4+- (23.Nc4 Qb4 A) 24.Na3?! Qb3 25.Qf3 Qf3 (25...Qa4? 26.Rc4 Nb4 27.d5+-) 26.gf3 b6=; B) 24.Ba3 Qb3 25.Bf8+-) 1–0. DEFFM – GuestZPGY, freechess.org, 2018.

7.0-0 Kh8 8.c4 c6 9.a4 a6 10.Qb3 Ne4 11.d4 Nd7 (11...ab5 12.ab5 Ra1 13.Ba1 cb5 14.cb5+=) 12.Nbd2 Bf6 13.Qc2 Be7 14.Ne1 (14.Rfc1 ab5 15.ab5 Ra1 16.Ra1 cb5 17.cd5 ed5 18.Bb5 Qb6+=) 14...Bd6 (14...ab5 15.cb5 c5 16.dc5 Ndc5 17.Ne4 fe4 18.a5=) 15.Ndf3 (15.c5 Bb8+=) 15...Rf6 (15...ab5 16.c5 Bc7 17.ab5 Ra1 18.Ba1 cb5 19.Bb5+=) 16.Nd3 White intends c5 16...Rh6 17.g3 Rf6 (17...dc4 18.Qc4 cb5 19.ab5+=) 18.c5 Bb8 19.Nb4 Qc7 20.Bd3 a5 21.Na2 Qd8 22.Nc3 Qe7 23.Ne2 e5 24.Ne1 g6 25.Ng2 (25.f3 Ng5 26.de5 Be5+=) 25...Ng5= 26.Nc1 Nf3 27.Kh1 Kg8 28.Be2 Ng5 29.Nd3 e4 30.Ndf4 Nf7 31.h4 ½–½. Lorenc,Tomas – Lastovicka,Jiri (2220), Tatry op Tatranska Lomnica, 1999.

7.0-0 Kh8 8.d4 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Nbd7 (11...c6 12.Bb2+=) 12.c4 c5 (12...Ne4 13.Qb3+=) 13.Qc2 Bd6 14.Nbd2 (14.cd5 Nd5 15.Rd1 b6+=) 14...Ne4 (14...b6 15.cd5 ed5 16.Qf5+=) 15.cd5 (15.Rc1 b6+=) 15...ed5 16.dc5 Ndc5 17.Rd1 Qc7 0–1. mrichardson (2510) – pierred (2780), net–chess.com, 2016.

7.Ne5 Nbd7 8.0-0 Ne5 9.Be5 c6 (9...Nd7 10.Bb2=) 10.d4 cb5 11.Bb5 Bd7 12.Be2 Ne4 13.Nd2 (13.f3 Nd6=) 13...Bd6 (13...Nc3 14.Qe1=+) 14.c4 (14.Bd6!? Nd6 15.c4+=) 14...Be5= 15.de5 Qc7 (15...Nc3!? 16.Qe1 Qc7=) 16.cd5+= ed5 17.f3?? (better is 17.Ne4!? de4 18.Qd5 Kh8 19.Rfd1+=) 17...Nd2 (better is 17...Nc3!? 18.Qe1 Qe5-/+ (18...Ne2?! 19.Qe2 Qe5 20.Rab1-/+)) 18.Qd2-/+ Qe5 19.f4 Qe6 20.Bf3 Bc6 21.Rfd1 Rad8 22.Qa5? (22.Rac1 Rfe8 23.Rc3 Ba4=+) 22...a6 (better is 22...Qe3!? 23.Kh1 Qf4 24.Bd5 Bd5 25.Rd5 b6-+) 23.Re1 (23.Qb6 d4 24.Rd3 Rd6 25.Bc6 Rc6 26.Qd4 Rc2=+) 23...Rfe8 24.Rad1 Qd6 (24...Bb5 25.e4 fe4 26.Bh5-+) 25.Qc3 g6 (25...b5 26.Qd4-/+) 26.Qb3 (26.Qd4 Qe6=+) 26...Qc5 (26...Qe6 27.Rd4-/+) 27.h3 (27.Rc1 Qe7=+) 27...Re7 28.Kh2 Kg7 (28...b5 29.Rc1 Qd6 30.Red1-/+) 29.Rd4 (29.Qb2 Kf7 30.Rd4 Rde8=+) 29...Rde8 (29...Qd4! 30.ed4 Re1-/+) 30.Rd3 (better is 30.Bd5 Bd5 31.Rd5=+) 30...Bb5 (30...Qa5 31.Re2 Rd8=+) 31.Rdd1?? (better is 31.Qb2 Kh6 32.Rd5+-) 31...Re3-/+ 32.Re3 (32.Qb2 Kh6 33.Rd5 Qc7 34.Rf5 Qc3 35.Qc3 Rc3=) 32...Qe3 33.Qd5 (better is 33.Qb4!?-/+) 33...Qf4-+ 34.Kg1 (34.g3 Qe3 35.Bg2 Bc6-+) 34...Bc6 35.Qd4 Qd4 36.Rd4 Bf3 37.gf3 Re7 38.a4 Kf6 39.Kf2 (39.Rb4 g5-+) 39...Kg5 (39...b5 40.ab5 ab5 41.Rd6 Kg5 42.Rd4-+) 40.h4 Kf6 (40...Kh5 41.Rb4-+) 41.f4 (41.Rb4 Ke5-+) 41...Rc7 (41...Re4!? 42.Rd6 Ke7 43.Rb6 Rf4 44.Kg3 Rg4 45.Kh3-+) 42.Ke3 (42.Rb4 Ke6-+) 42...Ke6 43.Kd3? (43.Rb4 Kd5-+) 43...Rc1 (43...Rd7 44.Rd7 Kd7 45.Kd4-+) 44.Rc4?? (44.Rb4 Rh1 45.Rb7 Rh4 46.Ke3-+) 44...Kd6 (44...Rc4 45.Kc4 b5 46.ab5 ab5 47.Kc5 b4-+) 45.Rc1+- (45...b5 46.ab5 ab5 47.Kd4+-) 1–0. var – Jackmg, Live Game Caissa's Web, 2004.

5.a3 c5 6.Nc3 c4 (better 6...cb4!? 7.Nb5 Nc6=+) 7.Nf3+= Be7 (7...a6 8.d3 cd3 9.cd3+=) 8.Be2 a6 (8...0-0 9.0-0+=) 9.0-0 (9.d3 cd3 10.cd3 0-0+=) 9...Bd7 (9...Nc6 10.Qe1=) 10.d3 (better 10.Ne5+=) 10...Nc6? (better 10...cd3!? 11.cd3 0-0+=) 11.dc4+- 0-0 (11...dc4 12.Bc4 b5+-) 12.cd5 ed5 13.Nd5 Nd5 (better 13...Be6 14.Nf6 Bf6 15.Qd8 Rad8 16.Bf6 Rf6+-) 14.Qd5 Kh8 15.Rad1 Be8 16.Ng5! Qd5 (16...Bg5 17.Qd8 Double attack (17.Qd8 Decoy)) 17.Rd5 Bg6 (17...Rd8 18.c4 Bg5 19.fg5+-) 18.Ne6 Rg8 (18...Rf7 19.e4!+-) 19.Rd7 Bf7 (19...Rab8 20.Bf3 Bf6 21.Bf6 gf6 22.Rfd1+-) 20.Ng5 Bg5 (20...Bg6 21.Rb7 Rge8 22.Rb6+-) 21.fg5 Bg6 (21...Nd8+-) 22.Bc4 1–0. gfhgon8787 – ejvrp57, internet online private game, 2018.

5.a3 Bd6 6.Nf3 0-0 7.c4 c6 8.c5 Bc7 (8...Be7 9.Nc3=) 9.Be2+= Ne4 (9...b6 10.cb6 ab6 11.Nc3=) 10.0-0 Nd7 11.Qb3 Ndf6? (better 11...Qe7 12.Nc3 a5+=) 12.d3+- Ng4 13.de4 Ne3?? (13...fe4 14.Nfd2 Qh4 15.Bg4 Qg4+-) 14.Qe3 fe4 15.Ne5 Rf5 (15...a5 16.Nd2+-) 16.Nd2 Qf6 (16...a5 17.Qg3+-) 17.Bg4 Be5 (17...Bd7 18.Qg3+-) 18.Be5 Re5 (18...Qe7 19.Bf5 ef5 20.Nb3+-) 19.fe5 Qe5 (19...Qe7 20.Nb3+-) 20.Nf3! Qc7 (20...ef3 21.Qe5 Pinning (21.Qe5 Deflection)) 21.Ng5 e5 (21...h6 22.Ne6 Be6 23.Be6 Kh8 24.Qd4+-) 22.Rf7 (better 22.Ne6!? Be6 23.Be6 Kh8+-) 22...Qf7 23.Nf7 Kf7 24.Rf1 Kg8 (24...Bf5 25.Qg5 g6 26.Bf5 Kg7 27.Be6 d4 28.Rf7 Kg8 29.Qe5 Rf8 30.Qg7) 25.Qf2 Bg4 (25...Bf5 26.Qf5 h6 27.Qg6 Kh8 28.Rf7 Rg8 29.Bf5 d4 30.Qh7) 26.Qf7 Kh8 27.Qf8! Rf8 (27...Rf8 28.Rf8) 28.Rf8 1–0. ggo7801 – mitmjr2, internet online private game, 2018.

5.a3 Bd6 6.h3 0-0=+ 7.g4 fg4 (7...a5!?=+) 8.hg4= Ne4 9.g5 (9.Qf3 Ng5 10.Qg2+-) 9...Nd7?? (9...Ng3 10.Rh3 Nf1=) 10.Qh5+- Ndf6? (10...e5 11.Bg2 h6 12.gh6 Qe7+-) 11.gf6 Nf6 12.Qg5 (12.Bf6 Qf6 13.Qh7 Kf7+-) 12...Be7 (12...Qe7 13.Bd3+-) 13.Bd3 Ne4 (13...h5+-) 14.Qg7 1–0. FeegLood (2035) – oto (1620), lichess.org, 2015.

5.Nf3 Bb4+= 6.Nc3 0-0-/+ 7.Ng5 (7.a3 Bc3 8.Bc3 Ne4+=) 7...h6 (better is 7...c5-/+) 8.h4? (8.Nf3 c5-/+) 8...Ng4 (8...hg5 9.hg5 Ng4 10.Qf3-+) 9.Bd3? (better is 9.Nf3-/+) 9...hg5-+ 10.hg5 c5 (10...e5 11.g3-+) 11.Nb5 (11.Qf3 d4 12.ed4 cd4-+) 11...a6 12.Rh7 (12.a3 Bd2! (12...ab5?! 13.ab4 Ra1 14.Qa1-/+) 13.Qd2 ab5 14.Bb5 Qb6-+) 12...Rf7 (better is 12...Kh7 13.Qg4 Rh8 14.c3-+) 13.g6 Rf6! (13...ab5 14.gf7 Kf7 15.Rg7 Kf8 16.Rh7+-) 14.Ke2 (14.Bf6 Nf6) 14...Rg6 15.Qh1 White gets decisive kings attack 15...Nh6 16.Rg7 Rg7 17.Qh6 Threatening mate: Qxg7 17...Qe7 (better is 17...d4 18.Rh1 Kf7 (18...Rg2 19.Ke1 Kf7 20.Qh5 Rg6 21.Rg1 ab5 22.Rg6+=) 19.Qh5 Ke7 20.Qh4 Kd7 21.Qd8 Kd8-+) 18.Nd6 White threatens to counter with Rh1 18...Bd7 (18...Qd6 Deflection from g7 19.Qg7 The nicest combinations are those leading to mate) 19.Rh1= Do you see the mate threat? 19...Kf8?? (better is 19...Rh7 20.Qg6 Rg7=) 20.Qh8 Rg8 21.Qg8!! Kg8 Decoy theme: g8 22.Rh8 1–0. Hartlaub – Teichmann,Richard, Leipzig, 1922.

5.Nf3 Bb4 6.Nc3 c5 7.a3 Ba5 A) 8.Bb5 Bd7 9.Be2 0-0 10.Rb1 Bc6 11.0-0 Ne4-/+; B) 8.Rb1 a6 (8...0-0 9.Be2 Ne4 10.Ne4 de4 11.Ne5 Nd7-/+) 9.Be2 0-0 10.0-0 b5 11.a4 b4-/+; C) 8.Be2 0-0 9.0-0 Ne4 10.Na2 Nc6 11.Rb1 Qc7-/+.

5.Nf3 Bb4 6.Nc3 c5 7.Bb5 Bd7 8.Rb1 (8.Be2 c4 (8...Nc6 9.a3 Ba5 10.0-0 0-0 11.Qe1 Ne4-/+; 8...0-0 9.a3 Ba5 10.Rb1 Bc6 11.0-0 Ne4-/+) 9.Rb1 0-0 10.0-0 Nc6 11.a3 Bc5-/+) 8...a6 (8...Ne4 9.Bd7 Nd7 10.Ne4 de4 11.Ng5 Qe7+=) 9.Be2 b5 (9...0-0 10.a3 Bc3 11.Bc3 b5+=) 10.a3 Ba5 11.0-0 d4 (11...0-0-/+) 12.ed4 cd4 13.Na2 (13.Nd4? Bb6 14.Na4 ba4-+) 13...Bc6 14.Nb4 (14.Nd4? Bb6-+) 14...Bb6 15.Kh1 0-0 16.Ng5 Qd6 17.c4 dc3! 18.dc3 (18.Bc3 h6; 18.dc3 Qd1) 18...Rd8 (18...Qd1!? 19.Rbd1 Bd5-/+) 19.c4= Qe7 20.Qb3 Bd7 21.cb5 ab5 22.Bf3 Ra4 23.Rfe1 Re8 (23...Kh8 24.Ne6 Re8+-) 24.Nd5!+- Nd5 (24...ed5 25.Re7; 24...Nd5 25.Bd5) 25.Bd5 h6 (better is 25...Bd4 26.Be6 Kh8 27.Bd4 Rd4 28.Nf7 Kg8 29.Nd6 Qe6 30.Ne8 Qb3 31.Rb3 Na6+-) 26.Be6 Kh8 27.Qh3 Bd4 28.Bd4 Rd4 29.Nf7 (29.Nf7 Kh7 30.Bf5 Kg8 31.Re7 Re7 32.Ne5+-) 1–0. Buss,Michael – Tjornsted,Peter, corr 3GMM–06, 1996.

5.Nf3 Bb4 6.Nc3 c5 7.Be2 A) 7...0-0 A1) 8.Rb1 a6 (8...c4 9.Nb5 Nc6 10.0-0 Qa5 11.a3 Be7-/+; 8...Ne4 9.Ne4 de4 10.Ne5 Nd7 11.Bc4 Qh4-/+) 9.a3 Ba5 10.0-0 b5 11.Qe1 Bb7-/+; A2) 8.a3 Ba5 9.0-0 Ne4 10.Na2 Nc6 11.Rb1 Qe7-/+; B) 7...c4 8.a3 (8.0-0 0-0 9.a3 Bc5 10.Qe1 Nc6 11.Na4 Be7-/+) 8...Bc5 9.Nb5 0-0 10.Bd4 Na6 11.0-0 Qa5-/+; C) 7...Nc6 C1) 8.0-0 0-0 (8...c4 9.a3 Be7 10.Ne5 Ne5 11.fe5 Nd7-/+) 9.a3 Ba5 10.Ne5 d4 11.Nb1 Ne5-/+; C2) 8.a3 Ba5 9.Bb5 0-0 10.Bc6 bc6 11.Rb1 Rb8-/+.

5.Nf3 Bb4+= 6.Be2 0-0 +=.

5.Qe2 Nf6 6.Qb5 Nc6 7.Qe2 (7.a3 a6 8.Qe2 e5=+) 7...Be7 (7...Nb4 8.Na3-/+) 8.c4 (8.a3 0-0=) 8...0-0 (8...Bb4 9.Nf3-/+) 9.cd5 (9.a3 dc4 10.Qc4 Nd5=) 9...Nd5 (better 9...Nb4!? 10.d3 Nbd5-/+) 10.b5= Nb8 11.Qc4 Bf6 (11...a6 12.Qa4=+) 12.Bf6= Qf6 13.Nc3 Nc3 14.dc3 (14.Qc3 Qc3 15.dc3 a6=) 14...c6= 15.bc6 Nc6 16.g3 (16.Rd1 Rf7=) 16...Bd7 (16...Ne5 17.Qb3 b6-/+) 17.Rb1? (17.Nf3 Rac8 18.Bg2 b5=+) 17...Na5 (17...Ne5!? 18.Qe2 Bc6-+) 18.Qc5 (18.Qb4 Bc6 19.f3 Qe5=+) 18...b6 19.Qc7?? (better 19.Qd4!?=+) 19...Rfc8 (better 19...Bc6 20.Nf3 Qc3 21.Nd2 Rf7-+) 20.Qd7-/+ Qc3?? (better 20...Rd8 21.Qd4 Rd4 22.cd4 e5-+) 21.Ke2 (21.Ke2 Qc2 22.Kf3 Qe4 23.Ke2-+). felixrbran – naiqwe, Rated Classical game, lichess.org, 2013.

5.Qf3 Nf6 =.

5.Qh3 Nc6?? 6.Bh8+- Nb4 7.Qh7 Nc2 (7...Ne7 8.Na3 Nbc6 9.Nf3+-) 8.Kd1 Nb4 (8...Na1 9.Qg6 Kd7 10.Qg8+-) 9.Qg8 Qe7 (9...Kd7 10.Qg6 Be7 11.Be5+-) 10.Qg6 Kd8 (10...Qf7 11.Qf7 Kf7+-) 11.Bf6 Qf6 12.Qf6 Ke8 13.Nf3 Be7 14.Qg6 Kd8 15.Ne5 (15.Ne5 Bd6 16.Qf6 Ke8 17.Be2 Be5 18.Qe5+-) 1–0. DEFFM – Jhieverson, freechess.org, 2018.

6.a3 a5=.

6.a3 Bg7 7.f4 0-0 8.Nf3 a5 9.Be2 ab4 10.ab4 Ra1 11.Ba1 Ne4 (11...b6!?=) 12.Bg7+= Kg7 13.Na3 c6 14.0-0 h6 15.Qa1 Qf6 16.d3 Nc3 17.Kf2 (17.Nd4 Ne2 18.Ne2 Qa1 19.Ra1 Kf6=) 17...Ne2 (better 17...Na6!?=+) 18.Ke2+= Na6 19.b5 Nc5 20.bc6 bc6 21.Qf6 (21.Ne5 Kh7+-) 21...Kf6+= 22.Rb1 Ba6 (better 22...Nd7!?=) 23.Rb6+- Rc8 24.Ne5 Bb7?? (better 24...g5+-) 25.d4+- Ne4 (25...Ba8 26.dc5 g5+-) 26.Rb7 Nc3 (26...Nd6 27.Rd7 Ra8+-) 27.Kd3 Nb5 28.Rh7 (28.Rf7) 28...Na3 (28...Rc7 29.Rc7 Nc7 30.Nc6 g5+-) 29.Nd7 (29.Rf7) 1–0. FeegLood (2085) – Yory21 (1735), lichess.org, 2015.

6.b5 a6 7.a4 ab5 (7...Bg7 8.Nf3=) 8.ab5 Ra1 9.Ba1 c6 (9...Nbd7 10.Nf3=) 10.c4 (10.Nf3 Bg7=) 10...Bg7 (10...Nbd7 11.Nf3=) 11.Nf3 0-0 12.Nc3 (12.Be5 Nbd7=) 12...Ng4 (12...c5 13.Be2=) 13.Be2 (13.d4 f4 14.h3 Nf6+=) 13...Qa5 (13...e5 14.bc6 bc6 15.h3=) 14.0-0+= e5 Black prepares f4 (14...Bd7 15.Qb3+=) 15.cd5+- cd5 (15...e4 16.Nd4 Bd4 17.ed4 cb5 18.Bg4 fg4 19.Ne4+-) 16.Nd5 e4 (16...Be6 17.Bc4 Kh8 18.Qb3+-) 17.Nd4+- Bd4 (17...Qa3 18.d3 Qd6 19.Nf4+-) 18.Bd4 (worse 18.ed4 Be6 19.Ne3 Ne3 20.de3 Qa2+-) 18...f4?? (better 18...Be6 19.Nc3 Nf6+-) 19.Ne7 (19.Bg4!? Bd7 20.Qb3 Rf7 21.Bd7 Nd7+-) 19...Kf7 20.Nc8 f3 (20...Rc8 21.Qb3 Kf8+-) 21.Qb3 White intends b6 21...Ke8 22.Qe6 Kd8 23.Qe7 Kc8 24.Rc1 Nc6 (24...Qc3 25.Rc3 Nc6 26.b6 Kb8 27.Qf8 Nd8 28.Qd8) 25.b6 Kb8 (25...Qb6 26.Bb6 Kb8 27.Qf8 Nd8 28.Qd8) 26.Qf8 Nd8 27.Qd8 1–0. DEFFM – GuestPHVV, freechess.org, 2018.

6.b5 Bb4 7.Nf3 Nbd7 (7...0-0 8.Nc3=+) 8.Ng5 (8.Be2 0-0=) 8...b6?? (better 8...Nc5=+) 9.Ne6+- (9.Ne6 Qe7 10.Nc7 Kf7 11.Na8+-) 1–0. GuestRQYK – GuestTRNZ, freechess.org, 2020.

6.b5 Bd6 7.f4=.

6.b5 Bg7 7.c4 0-0 8.cd5 ed5 9.Nf3 Nbd7 10.Qc2 b6 (10...a6 11.ba6 b6 12.Qc6 Ba6 13.Ba6 Ra6 14.0-0=) 11.Be2 (11.Qc6 Rb8 12.d4 Re8=) 11...Bb7 (11...a6 12.a4=) 12.Nd4 Re8 13.0-0 Rc8 14.Nc6 Bc6 15.bc6 Nc5 16.d4 Nce4 17.Ba6 Rb8 18.Nc3 Nc3 19.Qc3 Ne4 20.Qc2 Qg5 21.f4 (21.Rfe1!?=) 21...Qf6 22.Rf3 Nd6 23.Raf1 (23.Ba3 Rbd8=) 23...Re7 (23...b5 24.a4 b4 25.Qb3-/+) 24.a4 Rbe8 25.Qd3 Nf7 26.Rc1 Re4 27.Qb3 Qd8 0–1. GuestGMWF – GuestYPMP, freechess.org, 2017.

6.b5 Bg7 7.Nf3 0-0 8.c4 (8.Be2 a6=) 8...c6 (8...a6 9.Ba3 Re8 10.d4=) 9.a4 (9.d4 cb5 10.cb5 Ne4=) 9...Ne4 (9...a6 10.c5=) 10.Bg7 Kg7 11.Be2 (11.d4 Qa5 12.Nbd2 a6=) 11...a6+= 12.Qb3 (12.ba6 b6+=) 12...ab5 (12...dc4 13.Qb2 Qf6 14.Qf6 Kf6 15.bc6 Nc6 16.Bc4=) 13.cb5 Nd7 (13...f4 14.0-0=) 14.Qb2+= Qf6 15.Qf6 Kf6 16.Nc3 (16.bc6 bc6 17.a5 Ba6=) 16...Nc3+= 17.dc3 Nc5 18.bc6 bc6 19.Nd4 (19.Bd1 Ba6+=) 19...Bd7 (19...Ra4 20.Ra4 Na4 21.Kd2-/+) 20.0-0 (20.a5!? e5 21.a6-/+) 20...Na4-+ 21.Rfc1 (21.Ra3 e5 22.Nc2 Nc5-+) 21...c5 (21...Nc3 22.Ba6 Rfb8 23.f4-+) 22.Nf3 (22.Nb5 c4 23.Na3 Rfb8-+) 22...c4 (better is 22...Nc3!? 23.Kf1 Ra1 24.Ra1-+) 23.Kf1 Nc5 24.Bd1 (24.Ke1 Nb3 25.Ra8 Ra8-+) 24...Ne4 25.Ra8 Ra8 26.Ng1 Ra3 27.Ne2 Ba4 28.Ba4 Ra4 29.Nf4 Ra3 30.Ne2 Nd2 31.Ke1 Nb3 32.Rd1 Ra1 33.Ra1 Na1 34.Nd4 e5 35.Ne2 Nb3 36.Kd1 Nc5 37.Kd2 g5 38.f3 f4 39.g3? Nb3 40.Kc2 fe3 41.f4 gf4 42.gf4 d4 43.fe5 Ke5 44.cd4 Nd4 (44...Nd4 45.Kc3 Ne2 46.Kc4 Ke4-+) 0–1. Nyikos,Laszlo – Tefs,Arnold (1655), Brandenburg–ch Seniors, 2005.

6.c4 c6 7.Nf3 Bb4 8.cd5 cd5 (8...ed5!? 9.Be2 0-0-/+) 9.Qa4= Nc6 10.Bb5 (10.Nd4 a5=) 10...Be7=+ 11.Bc6 bc6 12.Qc6 Bd7 13.Qa6 0-0 (13...Qc8 14.Qc8 Rc8 15.Nc3=+) 14.Ne5 (14.Ba3 Ne4=) 14...Qc7 15.Nd7 Qd7 16.0-0 Rfc8 17.Nc3 Rc6 18.Qa4 Qb7 (18...e5 19.Rac1 Rac8 20.d4=+) 19.Rab1= Ra6 (19...Qa6 20.Rfc1=+) 20.Qd4 (20.Qc2 Rb6=) 20...Qd7 (20...Qb4 21.Qb4 Bb4 22.Nb5=) 21.Ba1 Rc6 22.Ne2 Rc4 23.Qb2 Rac8 24.Nd4 e5 (24...Rb4 25.Nb3=+) 25.Nf3 e4 (better 25...Rb4 26.Qe5 Re4=) 26.Ne5+- Qe6 27.Nc4 (27.Nc4 dc4 28.Qb7+-) 1–0. GuestPLLY – GuestASQS, freechess.org, 2018.

6.a3 Bd6 7.f4 0–1. Maillet,Fred – Bonansea,Martial, TG.2006.0., 2006.

6.b5 c5 7.c4 Bg7 8.Nf3 0-0 9.Be2 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Qa5 13.Bc3 Qa2 14.0-0 dc4 (14...Nbd7 15.Qh4+=) 15.Qh4+= Ne4 16.Bg7 Kg7 17.Qe7 Rf7 18.Qd8 Rf8 19.Qc7 Nd7 20.Ne5 Nef6 21.Bc4 Qb2?? (better 21...Qa7+/-) 22.Nd3+- Qc2 (22...Qa1 23.Nc5 Re8 24.Ne6 Kh8+-) 23.Rc1 Qa4 (23...Nd5 24.Qa5 Qc1 25.Nc1 f4+-) 24.Nc5 (24.Nc5 Qb4 25.Ne6 Kh8 26.Nf8 Qf8 27.Be6+-; 24.Be6?! Qb5 25.Nc5 Qb2+-) 1-0. wgr069 (2375) - VOJISLAVPAVLOVIC (2360), Casual Rapid game, lichess.org, 2021.

6.b5 Bg7 7.Nf3 0-0 8.c4 (8.Be2 a6=) 8...c5 9.Be2 Ne4 (9...a6 10.Na3=) 10.Bg7 Kg7 11.0-0 Qf6 (11...f4 12.d3 e5 13.Qh4 Qh4 14.Nh4=) 12.d4+= cd4 (12...a6 13.Na3+=) 13.ed4 (13.Nd4 Ng5 14.Qg3 f4 15.Qf4 Qf4 16.ef4 Rf4=) 13...b6 (13...Nd7 14.Rd1+=) 14.cd5 (14.Rc1 Nd7 15.Nc3 Bb7 16.cd5 Rac8=) 14...ed5 15.Rc1 Be6 16.Bd3 (16.Ne5 Nd7 17.f4 Rac8+=) 16...f4 (16...Nd7 17.Rc6=) 17.Rc7 Rf7 18.Rf7 Qf7 19.Qh4 Nd7? (better 19...Qf6=) 20.Be4+- de4 21.Ng5 Qg8 (21...Qf5 22.Qh7 Kf6 23.h4+-) 22.Qf4+- Rf8 (22...Bf5 23.g4 (23.Ne4 Be4 24.Nc3 Bf5-/+) 23...Be6 24.Nc3+-) 23.Qe4 Bf5 24.Qe7 Kh8 25.Nc3 1–0. DEFFM – GuestTJMG, freechess.org, 2018.

6.b5 Bg7 7.Nf3 c6 8.a4 a6 9.Bd3 (9.Be2 cb5 10.ab5 Qc7=) 9...Qb6 (9...Nbd7 10.0-0=) 10.a5+= Qd8 11.b6 Nbd7 12.0-0 (12.Be2 Qe7+=) 12...Nc5 (12...Qe7 13.Be2=) 13.Be2+- Qe7 14.Ba3 Nfd7 (14...e5 15.Ne5 f4 16.Bc5 Qc5 17.Qf3+=) 15.d4+- Qf7 (15...Qf6 16.Rc1+-) 16.Nbd2 Ne4 17.Ne4 fe4 18.Ng5 Qf5 19.Qg3 (19.Ne6!? Qh3 20.Nc7 (20.Ng7?! Kf7 21.gh3 Kg7+-) 20...Kd8 21.gh3+-) 19...h6+= 20.Nh3 Nf6 (20...e5!? 21.Bg4 Qf6+-) 21.Nf4+- g5? (better 21...Kf7+-) 22.Nh5+- Nh5 (22...Kf7 23.Qc7 Nd7+-) 23.Bh5 (23.Bh5 Qf7 24.Qc7+-) 1–0. DEFFM – GuestWQNH, freechess.org, 2018.

6.Nf3 Bb4 7.Qh4 Be7 8.Ne5 0-0 (8...Ng4 9.Qh3 Bf6 10.d4-/+) 9.Qh6=+ Qe8 10.h4 Nbd7 11.f3 (11.h5!? Ne5 12.Be5=+) 11...Ne5 (11...Bd6 12.f4-/+) 12.Be5 c6 (12...Rf7 13.Nc3-/+) 13.Rh3 (13.h5!? Qf7 14.hg6 Qg6 15.d4-/+) 13...Rf7-/+ 14.Rg3 (14.Be2 Nd7 15.Bb2 e5-/+) 14...Rg7 (14...Qf8 15.Qf8 Rf8 16.Rh3-/+) 15.Rg5 (15.d4!?-/+) 15...Qf8 16.g4 (16.Rg3 Rf7 17.Qf8 Rf8-/+) 16...Bd6 (16...fg4 17.f4 Rf7 18.Qf8 Kf8-+) 17.d4? (17.Bd6!? Qd6 18.gf5 ef5 19.Nc3-/+) 17...Be5-+ 18.de5 Ne8 (18...Nd7 19.gf5 Ne5 20.Rg3 Qb4 21.Nd2-+) 19.f4? (19.c3 Qc5 20.Kd2 f4-+) 19...fg4 (better 19...Qc5 20.Kd1 Qe3-+) 20.Bd3 (20.c3 d4! 21.Rg4-+ (21.ed4? Qf4 22.Nd2 Qg3 23.Kd1 Qc3-+)) 20...Bd7 (20...Qb4 21.Nd2 c5 22.h5-+) 21.Nd2 (21.h5 d4 22.a3= (22.ed4? Qf4 23.Nd2 Qe3 24.Kd1 Qd4-/+)) 21...c5 22.c4 Bc6 23.Kf2? (better 23.h5!? d4 24.hg6 de3 25.gh7 Kh8 26.Nf1=+) 23...Rd8-+ Black intends d4 24.Be2 d4 25.Bg4 (better 25.Rd1 de3 26.Ke3-+) 25...de3 26.Ke3 Qf7?? (better 26...Rd2 27.Be6 Kh8 28.Rg6 Rd4-+) 27.Re1?? (better 27.Nb3=+) 27...Rd2!-+ 28.Kd2 Qf4 29.Kc3 Qd4 30.Kb3 (30.Kc2 Ba4 31.Kb1 Qd3 32.Kb2 Qd2 33.Ka1 Qc3 34.Kb1 Bc2 35.Kc1 Be4 36.Kd1 Qc2) 30...Nc7 (30...Ba4 31.Ka4 Qc4 32.Ka3 Qb4) 31.Rd1 (31.Be6 Ne6 32.Rg3-+) 31...Qe3 (31...Ba4! 32.Ka4 Qc4 33.Ka3 Qb4) 32.Kb2-+ Qf2 33.Ka1?? (better 33.Kc1-/+) 33...Rf7 (better 33...Qc2 34.a3 Qb3 (worse 34...Qc4 35.h5 Bd5 36.Rd5 Qd5 37.hg6 Qd4 38.Ka2 Qd2 39.Ka1 Qc1 40.Ka2 Qc2 41.Ka1 Rg6 42.Rg6 hg6 43.Qg5-+) 35.Rd8 Kf7-+) 34.Rd8=+ Rf8 (34...Be8 35.Re8 Ne8 36.Be6-/+) 35.Rg6= hg6 36.Qg6 The isolani on e6 becomes a target 36...Kh8 37.Qh6 Kg8 38.Qg6 Kh8 39.Qh6 Kg8 40.Qg6 Kh8 41.Qh6 Kg8 42.Qg6 Kh8 43.Qh6 Kg8 44.Qg6 Kh8 45.Qh6 Kg8 ½-½. _roman (1850) - pawn_x (1960), Rated Classical game, lichess.org, 2013.

6.Nf3 Bg7 7.b5 Qe7 8.Ba3 (8.Qh4 a6=) 8...Qd7 9.d4 (9.Ne5 Qd8 10.f4 Nbd7=) 9...Kf7?? (better 9...Ne4=) 10.Ne5+- (10.Ne5 Kg8 11.Nd7 Nbd7 12.Nc3+-) 1–0. GuestTHLW – GuestVLVP, freechess.org, 2019.

4.a3 (--> 1.b4 e6 2.Bb2 f6 3.a3 d5 4.e3).

4.b5 Qd7 5.Nf3 a6 6.Nc3 (6.a4 ab5 7.ab5 Ra1 8.Ba1 Bd6+=) 6...ab5 7.Bb5 c6 8.Bd3 b5 (8...Na6 9.Na4 Qc7 10.0-0=) 9.0-0 (9.e4 Bc5+-) 9...Na6+= 10.Nd4 (10.a3+=) 10...Nc7 (10...Nc5!? 11.Qh5 Kd8 12.Nc6 Qc6 13.Bb5 Qd6 14.Qe8 Kc7+=) 11.Qh5+- Kd8 12.a4 (12.f4 b4 13.Nd1 c5+=) 12...b4 (12...e5 13.ab5 ed4 14.Ra8 dc3 15.bc6 Qc6 16.Rc8 Kc8 17.Bc3+- (17.dc3?! Nh6=)) 13.Ncb5 cb5 (13...Ne8 14.e4 (14.Bh7 Ne7 15.f4 g6-+) 14...Ne7 15.Rfe1+=) 14.ab5 Rb8?? (better 14...Ra1 15.Ra1 g6+-) 15.Nc6+- Qc6 16.bc6 Ne7 17.Qf7 (better 17.Qh4+-) 17...Nc6 (17...e5 18.f4 h5+-) 18.Bf6! gf6 (18...Ne7 19.Bg7 Bg7 20.Qg7+-) 19.Qf6 Be7 20.Qh8 Ne8 21.Qh7 e5 (21...Bf6 22.Ra4+-) 22.Qg8 Bd7 23.Qd5 Nc7 24.Qg8 Ne8 25.Be4 Kc7 26.Bc6 Bc6 27.Ra7 Kd8 28.f4 e4 29.f5 Bf6 30.Qe6 Rc8 31.Rfa1! Rc7 (31...Ba1 32.Qe7) 32.Ra8! (32.Ra8 Ba8 33.Ra8 Rc8 34.Rc8) 1–0. Lavendel – Nikki, internet free game, 2018.

4.b5 Be7 5.Bd3 Nh6 6.Qh5 Kf8 7.c4 (7.Ne2 a6 8.Nbc3 ab5 9.Bb5 e5=+) 7...Qe8 (7...Nd7!?=+) 8.Qe8 (8.Qe2 Nd7+=) 8...Ke8 9.cd5 (9.Nc3 dc4 10.Bc4 Kf7+=) 9...ed5 10.Nf3 Kf7 (10...Nd7 11.Nc3 Nb6 12.a4+=) 11.Nc3 Rd8 (11...Be6 12.Nd4+=) 12.Bh7+- Bg4 (12...g6 13.Nh4 Bf5 14.g4+- (worse 14.Nf5 Nf5 15.h4 Kg7-/+)) 13.Nh4 (13.h3 Bf3 14.gf3 a6+-) 13...g5 14.h3 (14.Nf3 Bf3 15.gf3 f5+-) 14...Be6 15.Nf3 Rh8 (15...c5!?+-) 16.Bc2+- b6? (better 16...Nd7!?+-) 17.Bb3 (better 17.Nd4 Bb4 18.Bb3 Bc3 19.Bc3+-) 17...c6 (17...Nd7 18.Bd5 Bd5 19.Nd5 Bd6+-) 18.Nd4 cb5 (18...Bb4 19.bc6 Bc3 20.dc3 Na6 21.Ne6 Ke6+-) 19.Ne6 Na6 20.Bd5 (better 20.Nd4 Raf8 21.Bd5 Kg6 22.Ncb5+-) 20...Rac8 (20...Nb4 21.Nd4 Nd5 22.Nd5+-) 21.Ng5 (better 21.Nc5! Kg6 22.Na6 Rcd8+-) 21...Kg6 22.Ne6 b4 (22...Nb4 23.Nf4 Kg7 24.Be4+-) 23.Ne4 (23.Nb5 Nc5 24.Nf4 Kg7 25.Na7 Rc7+-) 23...Rc2 (23...Nf5 24.g4 Nd6 25.Nf4 Kh7 26.Nf6 Bf6 27.Bf6+-) 24.Nf4 Kg7 25.Rb1 Nc5 (25...Nf7 26.Kd1 Rb2 27.Rb2+-) 26.Nh5 (26.Nc5 Rc5 27.Ne6 Kg6 28.Be4 Kf7 29.Nc5 bc5+-) 26...Kf8 27.Bf6 (better 27.Kd1 Rb2 28.Rb2 Ne4 29.Be4+-) 27...Ra2 (27...Bf6 28.Nef6 Na6+-) 28.Bh8 a5 29.Ba2 Nf5 1–0. GuestVKML – GuestBLLJ, freechess.org, 2020.

4.b5 Nh6 5.Qh5 Nf7 (5...g6 6.Qd1=) 6.Nf3 (6.Nc3 Nd7+=) 6...Bd6 (6...Nd7 7.Nc3+=) 7.c4 c6 8.bc6 (8.Nc3 Nd7+=) 8...bc6 (8...Nc6 9.cd5 ed5+=) 9.Bd3 (better 9.Nc3!?+=) 9...g6=+ 10.Qh4 0-0 (better 10...Nd7=+) 11.Bf6+- Qe8?? (better 11...Qc7 12.c5! Bc5 13.Bg6 hg6+-) 12.Bg6!+- hg6 (12...hg6 13.Ng5 Combination) 13.Ng5 Ng5 (13...Nh6 14.Bb2 Nd7 15.Qh6 Nf6+-) 14.Qh8 Kf7 15.Qg7 1–0. GuestGNVN – GuestNMJJ, freechess.org, 2020.

4.c3 Bd6 5.a3 (5.Bd3 Nh6=) 5...Ne7 (5...a5 6.Qh5 g6 7.Qf3+=) 6.Nf3 (6.Qh5 g6 7.Qf3 0-0=) 6...Nd7 7.Be2 0-0 8.Qc2 (8.0-0 Nb6=) 8...Ne5 (8...a5 9.0-0+=) 9.Ne5= Be5 10.Bd3 (10.0-0 a5=) 10...g6 (10...h6 11.0-0=) 11.Be2 (11.f4 Bd6=) 11...Nc6 (11...a5!?=) 12.d4+= Bd6 13.Nd2 (13.c4 dc4 14.Bc4 Bd7+=) 13...Bd7 (13...e5 14.c4 Bf5 15.Qb3 dc4 16.Bc4 Kg7 17.d5+=) 14.Bc1 (14.c4!?+=) 14...e5= 15.Nf3 (15.0-0 Be6=) 15...e4 (15...a5 16.b5 Bf5 17.Qd2=) 16.Nd2 f5 17.g3 (17.b5 Na5=) 17...Qf6 (17...Be6 18.0-0=) 18.Bb2 (18.c4 Be6=) 18...g5 (18...b5 19.0-0+=) 19.0-0-0 (19.c4 Be6=) 19...f4 (better is 19...b5=) 20.Rhf1?? (20.gf4 gf4 21.c4 fe3 22.fe3+=) 20...f3-+ 21.Bb5 g4 (better is 21...Nd4!? 22.ed4 Bb5-+) 22.c4+= dc4?? (22...Qf7 23.Ba4 Bb4 24.cd5 Bd2 25.Kd2-/+) 23.Nc4?? (23.d5 Nb4 24.ab4 Qe7 25.Bd7 Qd7 26.Qc4 Rae8 27.Ne4 b5+-) 23...Be7?? (better is 23...Qf5 24.d5 Ne5 25.Bd7 Nd7+=) 24.d5 Qh6? 25.dc6 Bc6 26.Bc6 Qc6 27.Ne5 Qc2 28.Kc2 Bf6 29.Ng4 Bb2 30.Kb2 Rac8 31.Rd7 Rf7 32.Nh6 (32.Nh6 Kg7 33.Nf7+-) 1–0. Rickytan (1650) – Agilisaurus, internet, 2007.

4.c4 Bb4 5.cd5 ed5 6.Qa4 Nc6 7.Bb5 Bd6 (better 7...Qd6!?=+) 8.Bc6+= bc6 9.Qc6 Bd7 10.Qc2 (better 10.Qd5!? Rb8 11.Bd4=) 10...Ne7=+ 11.Nf3 0-0 12.0-0 c5 13.Nc3 Bc6 (13...Bg4 14.d4=+) 14.d4= Ng6 (better 14...c4=) 15.dc5+/- Bc5 (better 15...Be5+/-) 16.Ne2 (better 16.Nd1 Bb5 17.Qc5 Bf1 18.Kf1+-) 16...Bb5+= 17.Qc5 (17.Nfd4 Bd4 18.Bd4+= (18.ed4? Re8 19.Nc3 Bf1 20.Rf1 Rc8-+)) 17...Be2= 18.Rfe1 Bf3 19.gf3 Nh4 (19...Qd7 20.Qd4=+) 20.Red1= The isolani on d5 becomes a target 20...Qe8 (20...Rc8 A) 21.Qa7? Qe8 (21...Nf3?! 22.Kg2 Nh4 23.Kf1=) 22.Rdc1 Nf3 23.Kg2 Qe4-+; B) 21.Qd5 Qd5 22.Rd5=) 21.Qd5+= Kh8 22.f4 (22.Rd4 Rd8 23.Qd8 Qd8 24.Rd8 Rd8+=) 22...Qg6 23.Kh1 (23.Kf1 Rad8 24.f5 Qg4 (worse 24...Rd5 25.fg6 Rd1 26.Rd1+/-) 25.Qd8 Qg2 26.Ke1 Qh1 27.Ke2 Qf3 28.Ke1 Qh1 29.Ke2 Qf3 30.Ke1 Qh1=) 23...Rab8 (23...Rad8 24.Qc6=+) 24.Rg1 (24.Ba3 Rb5 25.Qc6 Rb6=) 24...Qc2 25.Qd7?? (25.Bd4 Rbd8 26.Qe6 Rfe8=) 25...Ng6 (25...Qe4 26.f3 Qf3 27.Rg2 Qg2) 26.Bd4= Qf2 27.Qc6 (27.Ba7? Qf3 28.Rg2 Rb7-+) 27...Rfc8 28.Qg2 Qg2 29.Rg2 a6 30.Rag1 Rb7 31.a4 Nh4 32.Rg3 (32.Re2 Rbc7=) 32...Nf5-/+ 33.R3g2 Rb4 (33...Nd4 34.ed4 Rc4 35.d5-/+) 34.Rd1 (34.a5!?=+) 34...Ra4-/+ 35.Ba7 Re4 (35...Kg8 36.Rb2-/+) 36.Rc2 Ra8 37.Rd3 h6 38.Bb6 a5 39.Rc5 Ne3 40.Ra5 Ra5 41.Ba5 Nc4 (41...Ng4 42.Rf3-+) 42.Bc3 (better 42.Bc7!?-/+) 42...Rf4-+ 43.Kg2 Re4 44.Rd7 (44.Kf3 f5-+) 44...Ne5 (44...Re2 45.Kh1-+) 45.Rd8 Kh7 46.Re8 (46.Be5 fe5 47.Kf3 Rh4-+) 46...Kg6 47.Re7 (47.h3 Kf5-+) 47...Re2 48.Kf1 (48.Kh1 h5-+) 48...Re3 (48...Rh2 49.Be5 fe5 50.Re5-+) 49.Bd2 (49.Bd4 Rh3 50.Bg1 Rb3-+) 49...Re4 (49...Rh3 50.Kg2 Rh2 51.Kh2 Nf3 52.Kg3 Nd2 53.Kf4-+) 50.Ra7?! (50.Bc3 Rf4 51.Kg2 Rg4 52.Kh3 Rg5-+) 50...Nd3 (better 50...Nf3!? 51.Bc1 Nh2 52.Kg2 Re2 53.Kg3-+) 51.Ra3 Ne5 52.Rg3?? (52.Ra7 Nf3 53.Bc1 Nh2 54.Kg2 Re2 55.Kg3-+) 52...Kf7-+ 53.Ra3 g5 54.Ra7 Kg6 55.Ra6 (55.Bc3 Ng4 56.Kg1 Re3-+) 55...h5 (better 55...Nf3 56.Bc3 Nh2 57.Kg2 Re2 58.Kg1-+) 56.Bc3 h4 57.Kf2 Kf5 58.Ra5 Rc4 59.Ba1 Rc2 60.Kg1 Ke4 (60...g4!? 61.Kh1-+) 61.Ra4 Ke3 62.Ra3 Nd3 (better 62...Ke2!? 63.h3-+) 63.Bf6 Rc1 (better 63...h3!? 64.Bg5 Ke4 65.Ra4 Kf5-+) 64.Kg2-/+ Kf4 (64...Rc5!?-/+) 65.Bg5 Kg5 66.Rd3 Rc2 67.Kh3 Re2 (better 67...Rc5!?=) 68.Rd5+/- Kf4 69.Rd4 (69.Rh5 Ra2+/-) 69...Kg5 (better 69...Re4!? 70.Re4 Ke4 71.Kh4 Kf5=) 70.Rg4+/- Kh5 71.Rh4 Kg5 72.Rg4 Kh5 73.Rg3 1-0. carlos78 (2260) - CaicoAmaral (2065), Rated Blitz game, lichess.org, 2015.

4.c4 Kf7 5.cd5 (5.a3 a5+=) 5...ed5= 6.Bd3 Nh6 7.Qh5 (7.a3 Bf5 8.Bf5 Nf5+=) 7...g6 8.Qe2 (8.Qh4!?=) 8...Bb4=+ 9.Nf3 Nc6 (9...Kg7 10.0-0=+) 10.0-0 Bg4 11.h3 Bf3 12.Qf3 Kg7 13.Qg3 (13.a3 Be7=+) 13...Bd6-/+ 14.Qf3 Ne5 15.Be5 Be5 (worse 15...fe5 16.Qd5 c6 17.Qb3=) 16.Nc3 c6 17.Rab1 Rb8 18.Rb3 Nf7 19.Rfb1 b6 (19...Qe7 20.Be2-/+) 20.Qg4 f5! 21.Qa4 (21.Bf5 Nh6 Double attack (21...Nh6 Decoy)) 21...Qc7 22.Ne2 b5 23.Qa3 Rhe8 (23...a5 24.Rc1 b4 25.Qa4-+) 24.f4 (24.Bc2 a5-/+) 24...Bf6-+ 25.g4 (25.Rc1 Qb6-/+) 25...fg4 26.hg4 h6 (26...Kg8 27.Qc5 Qd7 28.g5-+) 27.Qc5 Qd7 28.f5 Ne5 29.Nd4 Nd3 (29...a5 30.Be2-/+) 30.Rd3 Qc7 31.Ne6?? (better 31.Kg2 Qe5 32.Kh3-/+) 31...Re6!-+ 32.fe6 Qg3 33.Kf1 Rf8 34.Qf8 Kf8 35.g5 Bg5 36.Rb4 (36.Ke2 Qg2 37.Kd1 Ke7-+) 36…c5 0–1. GuestNPXW – GuestFDZK, freechess.org, 2019.

4.Bd3 Bb4 5.Qh5 g6 6.Bg6 Kd7 7.Bd3 Qe7 8.Nf3+- Nc6 9.e4 Bd6 (9...de4 10.Be4 e5 11.Nh4+-) 10.Nc3 (10.ed5 Nb4 11.Bb5 Kd8 12.Kd1+-) 10...a6? (better 10...Nb4!?=) 11.ed5+- ed5 (11...Ne5 12.Ne5 Be5 13.0-0+-) 12.Kf1 (12.Kd1 d4 13.Re1 Qf8+-) 12...d4 13.Re1 Qf8 14.Ne4 Be5? (better 14...Be7+-) 15.Bd4! (15.Ne5?! fe5 16.Bd4 Qg7+-) 15...Nd4 (15...Nd4 16.Ne5 Combination; 15...Bd4 16.Qd5 Double attack (16.Qd5 Decoy)) 16.Ne5 fe5 17.Qe5 (17.Qe5 Ne6 18.Qh8+-) 1–0. Pierre – JohnS_son, internet, 2020.

4.Nf3 Bb4-/+ 5.Nc3 Bd7 6.Be2 Nc6 7.0-0 a6 8.Rb1 Bd6 9.Ba1 Nge7 (better is 9...b5!?-/+) 10.Rb7= Na5 11.Rb1 c5 12.Rb6?? (better is 12.d4=) 12…Qb6-+ White resigned 0–1. Sim1 – matty722, ChessWorld.net, 2012.

4.Nf3 Nd7 5.b5 e5 6.Be2 b6 (6...Bd6 7.0-0=) 7.0-0 a6 8.d4 e4 9.Nfd2 ab5 10.f3 f5 11.Bb5 Ne7 12.c4 (12.fe4 de4 (12...fe4? 13.Qh5 g6 14.Qe5+-) 13.Ne4 fe4 14.Qh5 g6+=) 12...Ra5 (12...c6 13.Ba4=) 13.Nb3 Rb5? (better 13...c6 14.Na5 cb5=) 14.cb5+- g6 (14...Nf6 15.Nc3+-) 15.Nc3 Bb7 16.fe4 (16.a4 Bh6 17.Qe2 ef3 18.Rf3 Bg7+-) 16...fe4 17.Qe1 (better 17.Qg4+-) 17...g5? (better 17...Nf5+-) 18.Qf2+- Bh6 (18...Qc8+-) 19.Qf7 1–0. anotherheaven (1640) – Axl_Low, lichess.org, 2015.

4.h3 Bb4+= 5.Qh5 White gets kings attack (5.Bd3 g6 6.e4 e5 7.ed5 Qd5 8.Qe2 Ne7 9.a3-/+) 5...g6 6.Qh4 Be7 (6...Bf8 7.Nf3 Nc6 8.Nc3 e5 9.Bb5-/+) 7.Nf3 (7.Bd3 Kf7 8.Nf3 e5 9.Be2-/+) 7...g5?? (better is 7...e5-/+ 8.Be2 Bf5 9.d3-/+) 8.Qh5+- Kf8 (8...Kd7 9.Ng5! Qe8 10.Qf7 fg5 11.Qe8 Ke8 12.Bh8+-) 9.Ng5! Qe8 (9...fg5 10.Bh8) 10.Nh7 Rh7 11.Qh7 Qf7 12.Qh4 f5 (12...Ke8 13.Be2 Kd8 14.Qh5+-) 13.Qf4 Bd6 14.Qg5 Qe7 15.h4 e5 16.Nc3 Be6 (16...Qg5 17.hg5 c6 18.Rh7+-) 17.Nb5 Qg5 18.hg5 Ne7 (18...Nc6+-) 19.Rh6 Kf7 (19...Bd7 20.Rd6 cd6 21.Nc7+-) 20.Rf6 Ke8 21.Re6 (21.Re6 Kd7 22.Rh6+-) 1–0. pierre – kems, internet, 2008.

4.Qh5 g6 5.Qf3 Bb4 6.Ne2 Be7 (6...e5 7.Nbc3 c6 8.a3-/+) 7.Qh3 (7.Nf4 c6-/+) 7...e5 8.Qf3 Be6 9.Nec3 Nh6 10.e4 d4 11.Nb5 (11.Nd5 Bd5 12.ed5 Nf7-/+) 11...Qd7 12.c3 a6 13.N1a3?? (better 13.N5a3-+) 13...ab5 14.Nb5 (14.cd4 Ra3! 15.Ba3 Qd4 16.Bb5 c6-+) 14...c6 15.cd4 cb5 16.de5 0-0 (16...f5 17.Qf4 Nf7 18.ef5 gf5 19.Be2-+) 17.ef6 Rf6 (better 17...Ng4 18.Qd3 Bc5 19.Qd7 Nd7 20.Bb5 Bf2 21.Kd1 Bh4 (worse 21...Ndf6 22.e5 Ne4 23.Bd3-+) 22.Bd7 Bd7-+) 18.Bf6= Bf6 (18...Nc6 19.Be7 Qe7 20.Qf4=) 19.Qf6+= Ng4 20.Qb2 Attacks the isolani on b5 20...Qf7 (better 20...Nc6!? 21.Bb5 Qd4 22.Qd4 Nd4=+) 21.f3+/- Ne5?? (21...Nf6+/-) 22.Qb5 (better 22.Qe5 b4 23.Bb5+-) 22...Nbc6+= 23.Be2 (better 23.a4+=) 23...Nd4?? (23...Qf6 24.Rd1=) 24.Qb2?? (better 24.Qe5 Nc2 25.Kf2 Na1 26.Ra1+- (worse 26.Qa1 Ra2 27.Qd4 Qf4+-)) 24...Ne2 (24...Qf6 25.Kd1 (worse 25.Qb7 Rd8-/+) 25...Ne2 26.Ke2=+) 25.Qe5+= (25.Ke2?! Bc4 26.Kd1 Nd3=+) 25...Nf4 (25...Bc4 26.d4=) 26.0-0+/- Ra2 (26...Re8!? 27.Qb2 Nd3+=) 27.Ra2+- Ba2 28.Qb8 (better 28.Ra1!? Nd3 29.Qc3+-) 28...Kg7+= 29.Rc1?? (better 29.Qd8+=) 29...Ne2-+ 30.Kf2 Nc1 31.d4 Nd3 32.Ke3 Ne1 (better 32...Bc4-+) 33.g4 (33.Kf2 Nc2 34.Qe5 Kh6 35.d5-+) 33...Qf3 34.Kd2 Qf2 35.Kc3 Qc2 36.Kb4 Nd3 37.Ka5 Qc3 38.Kb6 Qd4 (38...Qc6 39.Ka5 Qa6) 39.Kc7 Qe5 40.Kc8 Qb8 (40...Be6!? 41.Kb7 Nc5 42.Kc6 Bd7 43.Kb6 Qb8 44.Kc5 Qe5 45.Kc4 Qe4 46.Kc3 Qe5 47.Kd3 Bg4 48.h4-+) 41.Kb8 b5 42.e5 Ne5 0-1. felixrbran - jch18, Rated Classical game, lichess.org, 2013.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bb4 8.Qg4 Bf8 9.Bd3 h5 (9...g6!?=) 10.Bg6+- Ke7 11.Bh5 e5 12.Qg6 (12.Qf3+-) 12...Ke6? (12...Be6 13.Be2+=) 13.Qf7 (13.Nf3!? Ke7+-) 13...Kd6+- 14.Bb2 (better 14.c4 Ne7 15.cd5 Nd5 16.Nc3 Nc3 17.Bc3+-) 14...Be6?? (better 14...Nh6 15.Ba3 c5 16.bc6 Kc6 17.Qe8 Qe8 18.Be8 Bd7 19.Bf8 Rf8+=) 15.Ba3+- c5 16.bc6! (16.bc6 Kc6 17.Qe6 (17.Qf8?! Qf8 18.Bf8 Rh5+=) 17...Kc7 18.Nc3+-) 1–0. DEFFM – drzach, freechess.org, 2017.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bc5 8.c4 dc4?? (8...e5 9.d4 ed4 10.ed4 Qe7 11.Qe2=) 9.Bc4 (9.Qh5 g6 10.Qc5 e5+-) 9...Ne7?? (9...Bd6 10.Qh5 g6 11.Qf3+=) 10.Nf3 (better 10.Qh5 Ng6 11.Qc5+-) 10...Nd5 11.0-0 0-0 12.Qb3 Qe7 (12...Qd7 13.Rc1 Qd6 14.d4+-) 13.Nc3 (13.Bd5 ed5 14.Qd5 Kh8+-) 13...Nb6+= 14.Be2 N8d7 15.d4 Bb4 16.Rc1 Bc3 (better 16...Ba3!? 17.Bb2 Bb2 18.Qb2 e5+=) 17.Bc3+- Nd5 18.Bb2 (18.e4!? Nc3 19.Qc3 c6 20.bc6 bc6 21.Qc6 e5+-) 18...Re8 19.Ba3 Qf7 20.e4 Nf4 21.Bc4 (better 21.Bf1 Nb6 22.Qe3+-) 21...Ng2? (better 21...Qg6 22.g3 Nb6+-) 22.Kg2+- Qg6 23.Kf1 Qe4 24.Re1 Qg4 (24...Qg6+-) 25.Be6 Qe6 (25...Re6 26.Re6 h5 27.Re4 Kh8 28.Rg4 hg4+-) 26.Re6 (26.Re6 h6 27.Re8 Kh7 28.Qc2 g6 29.Re7 Kh8 30.Qg6 Ne5 31.Qe8) 1–0. GuestBJCS – GuestNXQK, freechess.org, 2017.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bc5 8.d4 Bd6 (8...Bb4 9.c3 Ba5 10.Nd2+=) 9.c4 c6 10.c5 Be7 11.Nf3 (11.Nc3 Nh6+=) 11...Nh6 12.Qb3 (12.Nc3 Qa5+=) 12...0-0 (12...Bd7 13.bc6 Bc6 14.Bd3+=) 13.Be2 (13.Nc3!?+-) 13...b6= 14.bc6 Nc6 15.cb6 (15.Qb6 Qb6 16.cb6 Bd7=) 15...Bb7 (15...Nb4 16.Nc3 Bd7 17.0-0 Qb6 18.e4=) 16.Qb5 (better 16.0-0 Nb4 17.Nc3 Qb6 18.Na4+=) 16...Bb4? (better 16...Nf5!? 17.Bc3 Nd6+=) 17.Bc3+- Bc3 (17...Bd6!?+-) 18.Nc3+- Qd7 (18...Qe7 19.0-0+-) 19.Na4 Ra8 20.Nc5 Ra1 21.Bd1 Qd6?? (21...Qf7+-) 22.Nb7 Qb4 23.Qb4 Nb4 24.0-0 (better 24.Nc5 Nc6 25.0-0+-) 24...Nd3 (24...Ra6+-) 25.Nc5 Nc5 (25...Rb1 26.Bb3 Nc5 27.Rb1+-) 26.dc5 (26.dc5 Nf7 27.Nd4+-) 1–0. GuestQCPJ – GuestQCVW, freechess.org, 2020.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 dc4 9.Bc4+- Bb4 (9...Nd7 10.Be6 Nc5 11.Bc4+-) 10.Qb3 Qd7?? (better 10...Qe7+-) 11.Qb4+- 1–0. GuestQSZX – GuestLXDF, freechess.org, 2019.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7 8.c4 dc4 9.Bc4 c5 10.Nf3 Qb6 Exerts pressure on the isolated pawn (10...Nh6 11.0-0+=) 11.Nc3 Ne7 12.0-0 Nd5 (12...Nf5 13.Qb3+-) 13.Nd5 (13.Bd5 ed5 14.Nd5 Qa5+-) 13...ed5 14.Bd5 Bb5 (14...Qb5 15.Qc2 Bc6 16.Rb1+-) 15.Qb3 Nd7 16.Rb1 Qd6 17.Bf7 Ke7 18.d4 (18.Qb5 Kf7 19.Qb7 Be7+-) 18...Bc6 19.d5 c4? (better 19...Bb5 20.Be6 Ba6+-) 20.Qc4 b5 21.Qc6 Qc6 (21...Kf7 22.Rb5 Be7+-) 22.dc6 Ne5 1–0. DEFFM – GuestJWSM, freechess.org, 2018.

5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7 8.c4 dc4 9.Bc4 c6 10.Qb3 cb5 11.Be6 Be6 12.Qe6 Ne7 13.Nc3 b4?? (better 13...Qd7 14.Qb3 Na6 15.Qb5 Qb5 16.Nb5 Nd5+-) 14.Ne4+- Nbc6 (14...Qd7 15.Nd6 Kd8 16.Nf7 Ke8 17.Qd7 Nd7 18.Nh8 g6+-) 15.Nd6 Qd6 16.Qd6 Nc8 (16...Ng6 17.Qd5+-) 17.Qe6 Be7 (17...N8e7+-) 18.Qc8 Nd8 1–0. DEFFM – Vitejvpekle, freechess.org, 2019.

5.a4 c6 6.c4 Bd6 7.Nf3 (7.d4 ab5 8.c5 Be7 9.ab5 Ra1 10.Ba1 b6=) 7...Nh6 8.Be2 0-0 9.Nd4 (9.Nc3 ab5 10.ab5 Ra1 11.Qa1 Nd7=) 9...f5 (9...ab5 10.ab5 Ra1 11.Ba1=+) 10.Nc3 Nf7 (better is 10...e5 11.Nb3 Qg5=) 11.Bh5 (11.cd5 ed5 12.bc6 bc6=) 11...g6 (better is 11...e5 12.Nc2 dc4-+) 12.Be2= e5 13.Nf3 e4 14.Nd4 Be5 (14...ab5!? 15.ab5 Ra1 16.Qa1 dc4 17.Bc4 Be5=) 15.cd5 cd5 16.Qb3 Bd4 17.ed4 Be6 (17...ab5 18.ab5 (< 18.Qb5 Ra5 19.Qb3 Nc6=+; < 18.Nd5 ba4 19.Qa2 Be6-/+) 18...Ra1 19.Ba1+=) 18.ba6 ba6 19.a5 Nc6 20.Ba3? (20.Qa4!? Qc7 21.Ba3=) 20...Re8 (better is 20...Qa5 21.Qa2 A) 21...Nd4?! 22.Bf8 Qa2 23.Ra2 Kf8 24.Ra6 (< 24.Ba6 Ne5=+) 24...Ra6 25.Ba6=; B) 21...Nb4-/+) 21.Na4? (21.Bc5 Na5 22.Qb1-/+) 21...Nd4-+ 22.Bd1?? (22.Qd1 Qa5 23.Nc5-+) 22...Nb3 23.Bb3 Qa5 24.0-0 (24.Nc5 Rac8 25.Ne6 Re6-+) 24...d4 25.Bb2 (25.Nc5 Bb3 26.Nb3 Qd5-+) 25...Qb4 (better is 25...Bb3 26.Nc3 Qb6 27.Rfb1 dc3 28.Bc3-+) 26.Be6 Re6 27.h3 Qd2 28.Bd4 (28.Rfd1 e3 29.fe3 Qe3 30.Kh1 Qg3-+) 28...Qd4 29.Rfd1 Qb4 30.Rdb1 Qd2 31.Nc5 Rc6 32.Rd1 (32...Qe2 33.Re1-+) -+. Scirocco – pacificink, Live Game Caissa's Web, 2004.

5.c4 ab5 6.cb5 c6 7.a4 b6 8.Nf3 Ra5 9.Nc3 Bb4 10.Qb3 c5 (10...Bd6 11.bc6 Nc6 12.Nb5+=) 11.Be2 (11.Na2 Ne7+/-) 11...Ne7 (11...Ra7 12.d4+=) 12.0-0 (12.Na2 Qd6+=) 12...0-0 (12...e5 13.d4 e4 14.Nd2+=) 13.Rfd1 (13.Na2 Qd6+/-) 13...Ng6 (13...Ra7 14.d4+=) 14.d3 (14.Na2!?+/-) 14...Bc3 15.Qc3 (15.Bc3 Ra8+=) 15...Nd7 (15...e5 16.Nd2=) 16.Ng5 (better 16.d4+=) 16...e5?? (better 16...d4 17.ed4 fg5 18.dc5 Nf6=) 17.Ne6+- Qe7 18.Nf8 Kf8 (18...Ndf8 19.Qc2+-) 19.h3 (19.Qc2 Kg8+-) 19...d4 20.ed4 (20.Qc2 Bb7+-) 20...ed4+/- 21.Qb3?? (21.Qc2 Bb7 22.Bf1 Bd5+/-) 21...Nde5?? (better 21...Qe2 22.Re1 Qd2-+) 22.Rdc1 (better 22.Bc1+/-) 22...Nf4=+ 23.Re1 (23.Qc2 Bb7 24.g3 Ne2 (24...Nh3?! 25.Kf1=+) 25.Qe2 Nf3 26.Kf1 Qd7-/+) 23...Qb7 24.f3 Bh3 (24...Qf7!? 25.Qf7 Kf7-/+) 25.gh3= Ne2 (25...Nf3!? 26.Bf3 Qf3-/+) 26.Re2+= Qf3 27.Rf2 (27.Rg2 Qe3 28.Kh2 Nf3 29.Kh1 Ne1=) 27...Qg3= 28.Rg2 Nf3 29.Kf1 Qh3 (better 29...Nh2 30.Rh2 Qh2+=) 30.Qd5+- Nd2 31.Ke1 (31.Kg1 Nf3 32.Kf2 Ne5 33.Qd8 Kf7 34.Qc7 Qd7 35.Qb6 Qf5 36.Ke1 Qf3 37.Qc7 Ke8 38.Qb8 Kf7 39.Qe5 fe5+-) 31...Qe3 32.Re2?? (better 32.Kd1 Qf3 33.Qf3 Nf3 34.Bc1+-) 32...Nf3-+ 33.Kd1 Qd3 34.Kc1 Qe2 35.Qd8 Kf7 36.Qd7 Kg6 37.Qg4 Kf7 (better 37...Kh6 38.Qf4 Kh5 39.Qf5 g5 40.Qh7 Kg4-+) 38.Qd7 Kg6 39.Qg4 ½-½. iamdudum – esesoyyo, Rated Classical game, lichess.org, 2013.

5.c4 a6 6.a4 ab5 7.cb5 Bd7 (7...Bd6 8.Bd3=) 8.Nf3 Bd6 (8...e5 9.d4 e4 10.Nfd2=) 9.Be2 (9.d4 Qe7+=) 9...h6 (9...e5 10.Nc3 Ne7 11.Qb3=) 10.0-0 Ne7 11.d3 (11.Ba3 Ba3 12.Na3 e5+=) 11...e5= 12.Nc3 e4?? (better 12...Be6=) 13.de4+- de4 14.Ne4 Nf5?? (14...Bf5 15.Qc2+-) 15.h3 (better 15.Qd5 c6 16.Nd6 Nd6 17.Qd6+-) 15...Qe7 16.g4?? (better 16.Bd3 Bb4 17.Qc2+-) 16...Qe6?? (better 16...Qe4 17.gf5 Qf5-/+) 17.Nd6 (better 17.Qc2 Kd8 18.Rfd1+-) 17...Nd6 18.Nd4 Qe4?? (better 18...Qf7+-) 19.Bf3 Qg6 (19...Qh7 20.Ba8 h5 21.Qc1+-) 20.Ba8 f5 (20...h5 21.Qb1 Qb1 22.Rab1 hg4 23.hg4 Bg4 24.Rbc1+-) 21.Bf3 (better 21.Qc2 0-0 22.f3 Rc8+-) 21...fg4 22.Bg4 Bg4 (22...h5 23.Qc2 Ne4 24.f4 Bg4 25.hg4 Qg4 26.Qg2 Qg2 27.Kg2+-) 23.Qg4 Qg4 24.hg4 Rf8 (24...Nc4 25.Ra2 Kd7 26.Rd1+-) 25.Ne6 Rf6 (25...Rg8 26.Nc7 Kf7 27.Rfc1+-) 26.Bf6 gf6 27.Nc7 Kd7 28.Nd5 Ne4 29.Nb6 Kc7 30.Nd5 Kd6 31.Rfd1 Ke5 32.Nc7 Ng5 33.Kg2 (33.Rd5 Ke4 34.Kg2 Nf3 35.a5 Nc6 36.Ra4 Ncd4 37.Rdd4 Nd4 38.Rd4 Ke5 39.f4) 33...Ke4 34.a5 (34.Rd4 Ke5 35.f4) 34...Nf3 (34...f5 35.Rd5 Na6 36.Ra4 Nb4 37.Rb4) 35.Ra4 (35.Ra4 Nd4 36.Rdd4 Ke5 37.Rd5) 1-0. iamdudum (1720) – Mih, Rated Classical game, lichess.org, 2013.

5.c4 a6 6.Nc3 ab5 7.cb5 =.

5.c4 dc4 6.Bc4 a6 7.Qh5 g6 8.Qf3+=.

5.c4 dc4 6.Bc4 Bc5 7.Qh5+- Ke7 8.Qf3 (8.Qg4 Kf8+-) 8...c6+- 9.Ne2 (9.d4 Bd6+-) 9...Bb7 (9...Bd7 10.d4 Bb4 11.Nbc3+-) 10.Nf4 (10.Qg4 Qf8 11.Qe6 Kd8+-) 10...e5+- 11.Ne6 Qd7 12.Qg3 (12.Nc5?! bc5 13.Qg3 Kd8+=) 12...g6 13.Be5! (13.Nc5 bc5 14.Be5 cb5=) 13...fe5?? (13...cb5 14.Bf6! Nf6 15.Nc5 Qf5 16.Qc7 Nbd7 17.Nb7 bc4 18.Qc4 Rab8 19.Qb4 Nc5+-) 14.Qe5 cb5 (14...Ke8 15.Qh8 Qe7+-) 15.Nc5 Kd8 16.Nd7 (16.Nd7 Nd7 17.Qh8 bc4 18.Qg8 Kc7 19.Qc4 Kd6 20.Qh4+-) 1–0. DEFFM – GuestSMTY, freechess.org, 2018.

5.c4 dc4 6.Bc4 Qd7? 7.Ne2 Bb7 8.0-0 (better 8.Nf4 Ne7 9.Ne6 Bg2+-) 8...c6? (better 8...a6 9.Nf4 e5+-) 9.Qb3 Ke7 (9...Nh6 10.Be6 Qd6 11.Nbc3+-) 10.Nd4 cb5 (10...Nh6 11.Be6 Qd8 12.bc6 Nc6+-) 11.Be6 Qd6 (11...Qe8 12.Rc1 Kd8+-) 12.Nf5 Kd8 13.Nd6 Bd6 14.Bg8 Nc6 15.Nc3 a6 16.Qe6 Be5 17.d4 (17.Nd5 Bc8 18.Qc6 Rb8 19.Be5 Bd7 20.Qc7 Ke8 21.Qb8 Bc8 22.Qc8) 17...Bd4 18.ed4 Nd4 19.Qd6 (19.Qd6 Kc8 20.Rfc1 Bc6 21.Nd5 Ne2 22.Kh1 Ng3 23.Qg3 Ra7 24.Be6 Kb7 25.Qc7 Ka8 26.Nb6) 1–0. DEFFM – GuestVTPC, freechess.org, 2019.

5.c4 dc4 6.Bc4 Bd7 7.Nf3 Ne7 (7...c6 8.Qb3 Kf7 9.a4+/–) 8.0-0 (8.Nd4 Qc8 9.Qh5 Ng6+/–) 8...Nd5 9.Bd5 ed5 10.a4 (10.Nd4 c6+/–) 10...Bd6 11.g3 (11.Nc3 c6+=) 11...0-0 12.Nc3 Bg4 13.Nd5 c6 14.Nf4 (better is 14.Nc3!?=) 14...Bf4+= 15.ef4 Qd3 (15...Qd5!? 16.Ra3 cb5 17.ab5 Qb5+=) 16.Ra3= Qd5 17.h3 (17.Qb3 Rd8 18.Qd5 Rd5 19.bc6 Nc6=) 17...Bh5 (better is 17...Bh3!? 18.Re1 cb5 19.ab5 Qb5-/+) 18.g4 Bf7 19.Ne1 (19.Nd4 Rd8=) 19...Qe4 (better is 19...cb5!? 20.Nf3 ba4 21.Qa4 b5-/+) 20.Qf3+= Qf3 21.Nf3 (worse is 21.Rf3 cb5 22.ab5 Bc4+=) 21...c5 22.d4 c4 23.Nd2 Rc8 24.Rc3 Nd7? (better is 24...a6+=) 25.Rfc1+- a6 26.Nc4 ab5 27.ab5 Ra2 (better is 27...Bc4 28.Rc4 Rc4 29.Rc4 Ra5+-) 28.R1c2?? (better is 28.Nd6 Rc3 29.Bc3+-) 28...Bc4 29.Rc4 (better is 29.Kh2!?-/+) 29...Rc4-+ 30.Rc4 Rb2 31.Rc8 Kf7 32.Kg2 Rb5 33.Kf3 g6 34.Rc4 Rb3 35.Kg2 h5 36.Rc2 hg4 37.hg4 g5 38.fg5 fg5 39.Rd2 b5 40.f3 Nf6 41.d5 Ke7 42.d6 Kd7 43.Rd4 Rb2 44.Kg3 b4 45.Kh3 b3 46.Kg3 Rc2 47.Rb4 b2 48.Rb3 Kd6 49.f4 gf4 50.Kf4 Nd5 51.Ke4 Nc3 52.Kd3+= Ne2 ½–½. Valpa – Milosforman, playchess.de, 2005.

5.c4 dc4 6.Bc4 Bd7 7.Qh5 g6+= 8.Qf3 a6?? (better 8...c6+=) 9.Qa8+- ab5 10.Be2 (better 10.Bf1+-) 10...Bc6+- 11.Qa7 Bg2 12.Bf3 (12.Bb5?! Nd7 13.Nh3 Bh1= (worse 13...Bh3 14.Qb7+-)) 12...Bh1 13.Bh1 Bg7? (better 13...Bd6+-) 14.Nc3 (14.Na3 Ne7 15.Nb5 c6+-) 14...Ne7 (14...f5 15.d4 Nf6 16.Nb5+-) 15.Nb5 0-0 (15...c6 16.Nc7 Kf7 17.Qb6+-) 16.Qc7 Qd7 (16...Nd5 17.Qd8 Rd8 18.d4+-) 17.Qd7 (17.Qb6 Nd5 18.Bd5 Qd5+-) 17...Nd7 18.Rc1 (18.Ba3 Kf7+-) 18...Nc5 (18...Rc8 19.Rc8 Nc8 20.Bb7+-) 19.Ke2 f5 (19...Rc8 20.Ba3 Bf8 21.Nd6+-) 20.d4 (better 20.Ba3 Rc8 21.d4+-) 20...Ra8 (20...Ne4 21.Ba3 Bf6 22.f3+-) 21.a3 (better 21.Ba8 Ne4 22.Ba3+-) 21...Ra5 22.Nd6 (22.dc5?! Bb2 23.Nc7 Bc1 24.cb6 Ra3+-) 22...Nb3 (22...Na4 23.Ba1+-) 23.Rc3 (better 23.Rc7 Nd5 24.Rc8 Bf8 25.Nb7+-) 23...e5 (23...Nd4 24.ed4 Bd4+-) 24.Rb3 ed4 25.ed4 b5 26.Rb5 Ra4 (26...Rb5 27.Nb5 g5 28.a4+-) 27.Rb8 Bf8 28.d5 Ra6 29.Nc4 f4 30.d6 Nc6 31.Bd5 1–0. GuestJQJM – GuestPFXS, freechess.org, 2018.

5.c4 dc4 6.Qh5 Ke7? (6...g6 7.Qf3 Qd5+-) 7.Ba3 (7.Bc4 Qe8 8.Qf3 c6+-) 7...Kd7 8.Qf7 (better 8.Bc4 c6 9.Nf3 Ba3 10.Na3+-) 8...Be7?? (better 8...Ne7 9.Bc4 c6+-) 9.Bc4 Qe8 (9...c6 10.Qg7 Nh6 11.Be7 Qe7 12.Qh8 cb5+-) 10.Qe6 Kd8 11.Qd5 Qd7 (11...Nd7 12.Qa8 Ba3 13.Na3+-) 12.Qa8 Ba3 (12...c6 13.Qb8 cb5 14.Be7 Ne7 15.Bb3+-) 13.Na3 Bb7 14.Qb7 (14.Qb7 Qc8 15.Qa7+-) 1–0. GuestQPWL – GuestCJYS, freechess.org, 2020.

5.c4 c6 6.bc6 Nc6 7.cd5 Qd5 8.Nc3 Qd7 9.Bb5 Bb7 10.Rc1 a6 11.Ba4 b5 12.Bb3 (12.Bc2 Ne5 13.Nf3 Bf3 14.gf3 Rc8+=) 12...Ne5-/+ 13.Nf3?? (better is 13.Kf1-/+) 13...Nd3-+ 14.Kf1 Nc1 (better is 14...Nb2 15.Qc2 Ba3-+) 15.Qc1 Bf3 16.gf3 Bd6 17.Ne4 Rc8?? (better is 17...Ne7-+) 18.Nd6 Qd6 19.Qc8 Qd8 (19...Kf7 20.Kg2 a5 21.Rc1+-) 20.Qe6 Ne7 21.Ba3 (21.Qf7 Kd7 22.Qg7 Rf8+-) 21...Qd7 22.Qf7 Kd8 23.Qg7 Qe8 (23...Re8 24.Qf6 Qd3 25.Ke1 Qg6 26.Qd4 Kc7+-) 24.Be7 Qe7 25.Qh8 Qe8 26.Qf6 Qe7 1–0. Djakov,Joao – Ting,Aaron John, Internet Section, 2004.

5.Bd3+= a6 6.Qh5 Kd7 7.Bh7 (better is 7.Nc3 Ne7 8.a4+=) 7...Bd6 (better is 7...ab5 8.Qf7 Ne7=) 8.Qf7+/– Qe7 9.Bg8 Qf7 10.Bf7 Ke7? (better is 10...Rh6+-) 11.Bg6 e5 (11...Bd7 12.Nc3+-) 12.Nc3 Be6 13.h3 (13.h4 Nd7+-) 13...f5 14.h4 Nd7 15.h5 e4 (15...Nf8 16.Nh3+-) 16.ba6 (16.Nge2 Nf8 17.Nd5 Bd5 18.Bf5 ab5 19.Bg7 Rg8+-) 16...Ra6 (16...Ne5 17.Nh3 Ng6 18.hg6+-) 17.Nh3 Nf8 18.Nb5 Ng6 19.hg6 (19.Nd6?! Rh5 20.Nb5 c6+-) 19...Rh6 20.Bg7 (20.Nd6 Kd6 21.Bg7 Rg6 22.Bf8 Kd7+-) 20...Rg6 21.Nd6 Rg7 22.Nb5 Rg2 (22...c6 23.Nd4 Bd7+-) 23.Nc7 Ra7 (23...Bc8 24.Na6 Ba6 25.Nf4+-) 24.Ne6 Ke6 (24...Ra5 25.Nhf4 Rg8 26.Rb1+-) 25.Nf4 (25.Nf4 Kd6 26.Ng2+-) 1–0. Bonetti,Shane – Rookee, ICC, 2002.

5.Bd3+= Bb7 6.Qh5 Kd7 7.Ne2 Qe7 8.Nd4 (better 8.Nbc3+-) 8...c6?? (better 8...Nh6+-) 9.bc6 (9.Ne6 Nh6 (9...Qe6?? 10.Bf5 Qf5 11.Qf5 Kc7 12.Nc3+-) 10.Nf4 Qf7 11.Qh3 f5+-) 9...Nc6 10.Ne6! Nh6 (10...Ke6 11.Bf5 Double attack (11.Qh3 Decoy); 10...Qe6 11.Bf5 Double attack (11.Bf5 Decoy)) 11.Qd5 Ke8 (11...Qd6 12.Nf8 Raf8 13.Qd6 Kd6 14.Ba3 Ke6 15.Bc4 Kd7 16.Bf8 Rf8 17.Nc3+-) 12.Bb5 Rc8 13.0-0 (better 13.e4+-) 13...a6 14.Ba3 Qd7? (14...Qf7 15.Bf8 ab5+-) 15.Qd7 Kd7 16.Nf8 (16.Bf8?! ab5 17.Bg7 Ke6 18.Bh6 Ne5+-) 16...Rhf8 17.Bf8 Rf8 18.Be2 b5 (18...Kc7 19.Nc3 Rd8 20.d4+-) 19.c4 b4 (19...bc4 20.Rc1+-) 20.d4 a5 (20...Kc7 21.Nd2+-) 21.Nd2 Ba6 (21...Nf5 22.Nb3 Ra8 23.Bg4+-) 22.Nb3 (22.a3 ba3 23.Nb3 Ra8+-) 22...Rb8 (22...Kc7+-) 23.Nc5 (23.Nc5 Ke7 24.Na6+-) 1–0. DEFFM – GuestTFYV, freechess.org, 2019.

5.Bd3+= Bb7 6.Qh5+- g6 (6...Ke7 7.Ba3 Kd7 8.Ne2 Ba3 9.Na3+/–) 7.Bg6! Kd7 (7...hg6 8.Qg4) 8.Nf3 Ne7 (8...a6 9.Qh3 Bc5+-) 9.Bf6 d4 (9...hg6 10.Qh8 Qe8+-) 10.Bf7 Bf3 11.Qf3 Nd5 (11...c6 12.Bh8 Kc7 13.Be6 de3 14.Be5 Kb7 15.fe3 a6+-) 12.Bd8 (12.Bd8 Bd6 13.Be6 Ke6 14.Qh3 Kf7 15.Qf5 Ke8 16.Qd5 Kd8 17.Qa8+-) 1–0. pierre – tusimoj, internet, 2009.

5.Bd3+= Ne7!? +/–.

5.d4 Bd6 6.Bd3 Bb7 7.Qh5 Kf8 8.Nf3 (worse 8.Bh7 Qd7 9.Qg6 Qb5-/+) 8...Ne7 9.0-0 Nd7 10.Qh3 (10.Bh7 g6 11.Qh6 Kf7 12.Ne5 fe5 (12...Ne5?! 13.de5 Be5 14.Be5 fe5 15.f4-/+) 13.de5 Bc5-+ (worse 13...Ne5 14.f4 Ke8 15.Be5 Be5 16.fe5+/-; 13...Be5?! 14.Be5 Ne5 15.Qf4 Nf5 16.Qe5-+)) 10...Kf7 11.Nbd2 (11.Bh7? Nf8-+) 11...Nf8 12.c4 c6 13.e4 de4 14.Be4 Qc7 15.bc6 Bc6 16.d5 ed5 17.cd5 Bd7 18.Qh5 g6 (18...Kg8!? 19.Rac1 Qb8+/-) 19.Qh4+- Nf5?? (better 19...Ng8+-) 20.Qf6 (20.Qf6 Ke8 21.Qh8+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.Be2 Bb7 6.Bh5 (6.c4 a6 7.Nf3 ab5 8.cd5 ed5 9.Bb5 c6+=) 6...g6+= 7.Bf3 (7.Be2 a6=) 7...e5 (7...a6 8.c4=) 8.Nh3 Qd7 (8...a6 9.c4+=) 9.c4+- Ne7 10.0-0 c6 (10...a6!? 11.Nc3 ab5 12.cb5 c5+=) 11.cd5 Nd5 12.d4 Bg7 (12...e4 13.Be4 cb5 14.Nf4 Nf4 15.Bb7 Nh3 16.gh3 Qb7 17.Qb3+-) 13.de5 fe5 14.Bg4 (14.Nc3 Nc3 15.Bc3 a6 16.Qd7 Kd7 17.Rfd1 Ke7 18.Bb4 Ke8+-) 14...Qe7 (14...Qd8 15.Qb3 a5 16.e4+-) 15.bc6+- Bc6 16.Ba3 Qf7? (better 16...Nb4 17.Nc3 a5 18.Bb4 ab4+-) 17.Ng5 Qf6 (17...Qb7 18.Nd2 Qa6+-) 18.Ne4 Qd8 (18...Qh4 19.g3 Qd8 20.Nd6 Qd6 21.Bd6+-) 19.Nd6 Kf8 (19...Qd6 20.Bd6 Nd7 21.Be6+-) 20.e4 Nf6 (20...Bf6 21.ed5 Kg7 22.dc6 Rf8+-) 21.Nb7 Kf7 22.Nd8 Rd8 1–0. DEFFM – GuestKWNW, freechess.org, 2019.

5.Be2 Bd7 6.a4 (6.Bd3 g6=) 6...a5 (6...a6 7.Nf3=) 7.Nf3+= h6? (7...Bd6 8.Ba3+=) 8.0-0 (better 8.Ne5 fe5 9.Bh5 g6 10.Bg6 Ke7 11.Qh5+- (11.Be5?! Nf6=)) 8...Ne7 (8...Bd6 9.Nh4 Ne7 10.Bh5 Kf8 11.Ba3+-) 9.Nh4 (better 9.c4+-) 9...Nf5?? (better 9...Kf7+-) 10.Bh5+- Ke7 (10...g6 11.Bg6 Ke7 12.Qf3+-) 11.Ng6 Kd6 (11...Kf7 12.Nh8 Kg8 13.Ng6+-) 12.Nh8 (12.Nh8 Be8 13.Ng6+-) 1–0. GuestNQLF – GuestDCDW, freechess.org, 2018.

5.Nf3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Bd7 9.c4 c6 10.cd5 ed5 11.Nd4 (11.Qb3 Ne7+=) 11...Bc5 (better 11...c5!? 12.Nc2 Bf5=) 12.bc6+- Nc6 13.Qh5 g6 14.Qd5 Nd4 15.Bd4 Bd4 16.Qd4 (16.ed4?! Ne7 17.Qf3 Nf5=) 16...Bf5 17.Bb5 Kf7?? (better 17...Ke7 18.Qb2 Kf7+-) 18.Qd8 Bb1 19.Bc4 (better 19.Qd7!? Kf8 20.Bc4 Ne7+-) 19...Kg7 20.Qb6 Be4 21.Qc7 Kh6 22.Qf4 g5 23.Qe4 Ne7 (23...g4 24.Qf4 Kg6 25.Qg4 Kh6 26.Bg8 f5 27.Qf4 Kg6 28.Qd6 Kh5 29.Bf7 Kg5 30.h4 Kg4 31.f3) 24.Qe7 Ra8 (24...Rf8 25.Qf8 Kg6 26.g4 f5 27.Qf7 Kh6 28.Qf6) 25.Qf6 Kh5 26.Bf7 Kg4 (26...Kh4 27.Qd4 g4 28.Qf6) 27.f3 Kh4 28.Qh6 1–0. GuestLCTP – tomali, freechess.org, 2017.

5.Nf3 Bb4 6.Be2 Ne7 7.0-0 c5 (7...a6 8.a4=) 8.a3 Ba5 9.c4 dc4 (9...a6 10.d4=) 10.Bc4+= 0-0 (10...a6 11.d4+=) 11.Qb3+- Nd5 12.e4 (12.Bc3 a6 13.Ba5 ba5+-) 12...Nf4 (12...Nc7 13.d4+=) 13.g3+- Nh3 14.Kg2 Ng5 15.Ng5 fg5 16.Be6 Kh8?? (better 16...Be6 17.Qe6 Rf7+-) 17.Bd5+- Qe7 (17...Bg4 18.f3 (worse 18.Ba8 Bf3 19.Qf3 Rf3 20.Kf3 Qd3 21.Kg2 Qb5+-) 18...Nd7 19.fg4 Rf1 20.Kf1+-) 18.Ba8 Be6 (18...a6 19.f3+-) 19.Bd5 Bd5 20.Qd5 Nd7 21.f3 g4 (21...Rd8 22.Rd1+-) 22.Nc3 (22.fg4!? Rf1 23.Kf1 Nf8+-) 22...Nf6 (22...Ne5 23.f4 Nf3 24.Rad1+-) 23.Qc4 Qd7 24.d3 Nh5 (24...Rd8 25.fg4 Bc3 26.Bc3 Qd3 27.Qd3 Rd3 28.Bf6 gf6 29.Rf6 Kg7+-) 25.fg4 Rf1 (25...Nf4 26.gf4 Bc3 27.Qc3 Qg4 28.Kh1+-) 26.Rf1 Nf6 27.g5 Ng8 28.Rf8 (28.Rf8 Qe6 29.Qe6 Bc3 30.Qg8) 1–0. GuestVSVC – ftessier, freechess.org, 2018.

5.Nf3 Nd7 6.c4 Bb7 (6...a6 7.Nd4 Ne5 8.cd5 ed5 9.f4+=) 7.Qc2 (7.cd5 ed5 8.Nc3 Ne7+=) 7...Bd6 (7...a6 8.cd5 Bd5 9.e4+=) 8.Nd4 Qe7 (8...Nc5 9.cd5 Bd5 10.Nc3+=) 9.Be2 (9.cd5 Bd5 10.Nc6 Qf7+=) 9...Nh6 (9...dc4 10.Bc4 Ne5 11.Be6 Bg2 12.Rg1 Nf3 13.Nf3 Bf3 14.Qf5+-) 10.0-0 Nf5 (10...dc4!? 11.Bc4 Nc5+-) 11.Nf5 (11.Nc6 Bc6 12.bc6 Nf8 13.cd5 g6+-) 11...ef5+- 12.Qf5 dc4 13.Bc4 Ne5 14.Be2 g6 (14...c5 15.d4 Ng6 16.Qh5+-) 15.Qc2+- 0-0-0 (15...c5 16.Nc3+-) 16.a4 Kb8 (16...Qe6 17.f4 Nd7 18.a5+-) 17.a5 h5 18.ab6 ab6 19.Qa4 (19.f4 Ng4 20.Bd3+- (20.Qg6 Rdg8 21.Qg8 Rg8 22.Bg4 Rg4-+)) 19...h4? (better 19...Kc8+-) 20.f4 Nd7 (20...Nf7+-) 21.Bf3 Nc5 (21...c6 22.bc6 Kc7 23.cb7 Nb8+-) 22.Qa7 (22.Qa8 Ba8 23.Ra8) 22...Kc8 23.Bb7 (23.Bc6 Qe3 24.de3 Bc6 25.bc6 Bf4 26.Qa8) 23...Nb7+- 24.Nc3 Na5 (24...Rh5 25.Qa8 Kd7 26.Qb7+-) 25.Nd5 Qe4 (25...Qe6 26.Nf6 c5 27.Qb6 Qe7 28.Qa5 Qb7+-) 26.Nf6 (better 26.Qa8 Kd7 27.Nf6 Ke6 28.Qe4 Kf7 29.Ng4+-) 26...Qb4 (26...Qb7 27.Qa6 Nb3+-) 27.Qa8 1–0. AhmedSultanov (1785) – Aaallister (1805), lichess.org, 2019.

5.a4 b6 6.c4 a5 7.Nf3 Ne7 8.Be2 e5 9.cd5 (9.d4 cd4 10.ed4 e4+=) 9...Nd5 10.Nc3 Nc3 11.Bc3 Be6 12.0-0 c4 13.d4 Bd6? (better 13...cd3 14.Bd3 Nd7+=) 14.de5+- Be5 15.Qd8 Kd8 16.Be5 fe5 17.Ne5 Ke7 18.Rac1 Nd7 19.Nc6 Kf6 20.Bc4 Bc4 21.Rc4 Nc5 22.Rd1 Rae8 (22...Ke6 23.e4+-) 23.h3 (23.Rd6 Re6 24.Rf4 Kg5 25.Rd5 Kg6 26.Ne5 Re5 27.Re5 Rd8+-) 23...Re4 (23...Ke6 24.e4+-) 24.Rd6 Ne6 (24...Re6 25.Rf4 Kg5 26.Rd5 Kg6 27.Ne5 Re5 28.Re5 Rd8+-) 25.Re4 Kf5 26.Ree6 g6 (26...Re8 27.g4 Kg5 28.Rd5 Kh4 29.Rh5) 27.f4 (27.Re5) 27...Rf8 (27...Re8 28.g4) 28.Nd4 (28.g4) 1-0. BeepBeepImAJeep (2570) – anscariusbarcino, lichess.org, 2017.

5.c4 a6 6.a4 Nh6 7.Qh5 Nf7 8.Be2 (8.Nf3 Be7=) 8...ab5 (better 8...e5=) 9.ab5? (better 9.cd5 Qd5 10.Bb5 Bd7 11.Qd5 ed5 12.Nc3 Bb5 13.ab5 Ra1 14.Ba1=) 9...Ra1-+ 10.Ba1 Qa5 11.Bf6 gf6 12.Nf3 (12.cd5 Qa1 13.Bd3 Qe5 14.Qe5 Ne5-+ (worse 14...fe5 15.Nc3-/+)) 12...dc4 13.0-0 (13.Nc3 Qa1 14.Nd1 Qa4-+) 13...Qb5 14.Nc3 Qb3 15.Rb1 Qc2 16.e4 Nc6 17.Bc4 Be7 (17...Bh6 18.Qc5 Bd2 19.Nd2 Qc3 20.Rd1-+) 18.Nb5?? (18.Bb5-+) 18…Qb1 (18...Qb1 19.Bf1 Qe4-+) 0–1. DEFFM – GuestLHKT, freechess.org, 2018.

5.c4 dc4 6.Bc4 b6?? 7.Qf3 Nd7 (7...Nc6 8.bc6 Qc7 9.Nc3+-) 8.Qa8 Bd6 (8...Ne5 9.Be5 fe5 10.Qa7+-) 9.Be6 Ne7 10.f4 Nf8 (10...Qc7 11.Nf3+-) 11.Bc8 Nc8 (11...Qc8 12.Qa7 Bc7 13.Nc3+-) 12.Nf3 (12.Nc3 Qd7+-) 12...Ne6 13.Qe4 (better 13.Nc3 Qd7+-) 13...Qd7 (13...Qe7 14.Nc3 0-0 15.0-0+-) 14.f5 Qb5 (14...0-0 15.fe6 Qb5 16.Bc3+-) 15.Bf6 gf6 16.Qe6 Kd8 17.Qf6 Kc7 18.Qh8 Qb2 19.Qb2 1–0. Janek – Vigilante, internet, 2017.

5.c4 dc4 6.Bc4 b6?? 7.Qh5 g6 (7...Kd7 8.Nh3 Bd6+-) 8.Qf3 Be7 (8...Na6 9.Qa8 Nb4 10.Na3+-) 9.Qa8 Nd7 (9...Qc7 10.Ne2+-) 10.Qa7 Ne5 11.Be5 fe5 12.Nc3 Nh6 (12...Bd6 13.Nf3 Qc7 14.Qa4+-) 13.Na4 0-0 14.Nh3 Bf6 (14...Qd7 15.Qb6 Nf7 16.Nc5+-) 15.Qb6 Qe7 (15...Qb6 16.Nb6 Kf7 17.Nc8 Rc8 18.a4+-) 16.Nc5 e4 (16...Nf7 17.Rc1 Nd6 18.0-0+-) 17.Ne6 (17.Rc1 Nf7+-) 17...Be6 (17...Ba1 18.Nf8 Kf8+-) 18.Qe6 Qe6 19.Be6 Kg7 20.Rc1 Be7 21.Rc7 Kf6 22.Bd5 Rd8 23.Be4 1–0. GuestLGWZ – GuestFZRX, freechess.org, 2019.

5.c4 Qc7 6.Nc3 b6?? 7.cd5+- Bd6 (7...Qb7 8.Qh5 Qf7+-) 8.de6 Be6 (8...Kf8 9.Bc4 Bb7 10.Nf3+-) 9.Qf3 Ne7 (9...Nc6 10.bc6 a6 11.Ne4+-) 10.Qa8 0-0 (10...f5 11.Nh3 h6 12.g3+-) 11.Qe4 Qd7 (11...Bf5 12.Qc4 Kh8 13.f4+-) 12.Bc4 Re8 (12...Bf7+-) 13.Be6 Qe6 14.Qe6 (14.Qe6 Kf8 15.Qd6+-) 1–0. guest8 – Chess_ster, chessclub.com, 2019.

5.c4 Qc7 6.Nc3 d4 7.Ne4 f5+-.

5.c4 Bd6 6.Nf3 Ne7 7.Nc3 0-0 8.Qb3 b6 (8...Bc7 9.Ba3 d4 10.ed4 cd4 11.Nd4 Qd4 12.Be7=) 9.cd5+= e5 10.Bc4 Bb7 (10...Bg4 11.d3+=) 11.0-0 Nd7 12.Ne4 Bb8?? (better 12...Qc7+-) 13.d6+- (13.d6 Kh8 14.de7 Qe7 15.Bd5 Bd5 16.Qd5+-) 1–0. Pereira – Valoise, internet, 2020.

5.c4 Qd7 6.Nc3 d4 7.Na4 de3 8.fe3 Qc7+-.

5.c4 Qd7 6.cd5 ed5 7.Nc3 b6 (7...Ne7!?+-) 8.Qh5+- g6 (8...Qf7 9.Qd5 Qd5 10.Nd5+-) 9.Qd5 Qd5 10.Nd5 Bd6 11.Bf6 (11.Bd3 Nd7 12.Be4 Rb8+-) 11...Nf6 12.Nf6 Kf7 (12...Kf8 13.Ne4 Be7 14.Ne2+-) 13.Ne4 Be5 (13...Ke7 14.Nf3+-) 14.d4! cd4?! (14...Bf6 15.Nf3 Nd7 16.Bc4 Kg7 17.Rd1+-) 15.Nf3 (better 15.Bc4 Kg7 16.Bd5 de3+-) 15...Bg7? (15...Nd7 16.Ne5 Ne5 17.ed4 Ng4+-) 16.Bc4 (16.Nd4?! Ke7+-) 16...Kf8 (16...Ke7 17.Bd5 de3 18.Rd1+- (18.Ba8?! Ba1 19.fe3 Bg7+=)) 17.Bd5 de3 18.Rc1 (18.Ba8?! Ba1 19.fe3 Kg7+-) 18...ef2 (18...Nc6 19.bc6 a6 20.fe3+-) 19.Kf2 Bf5 (19...Nc6 20.bc6 Bg4 21.c7+-) 20.Ba8 Nd7 (20...a5 21.Rc7 Nd7 22.Re1+-) 21.Rc8 (better 21.Rc7 Ke7 22.Bc6 Rd8+-) 21...Ke7 22.Rhc1 Nc5 (22...Rc8 23.Rc8 Bh6 24.Nd4 Be4 25.Be4+-) 23.Rc7 Kf8 (23...Nd7 24.Bc6 Rd8+-) 24.Nc5 bc5 25.Bd5 Bf6 26.Rf7 (26.Rf7 Ke8 27.Rf6+-) 1–0. GuestPXGN – GuestQCVN, freechess.org, 2020.

5.c4 Kf7 6.Nh3 Ne7 7.Be2 (7.cd5!? Nd5 8.Nc3 Nc3 9.Bc3+=) 7...a6+= 8.a4 ab5 9.ab5 Ra1 10.Ba1 Nd7 11.0-0 Nb6 12.cd5 ed5 13.Nf4 Ng6 14.Bh5 Bd6 15.Qc2 (15.Nc3 Bf4 16.ef4 Re8+=) 15...Qd7 16.Bg6 hg6 17.Qg6 Kf8 18.Qg3 Rh6 19.h4 g5 20.hg5 fg5 21.Qg5 Qh7 22.f3 Be7 23.Qg7? (better 23.Qe5=+) 23...Qg7-+ 24.Bg7 Kg7 25.Nc3 Rd6 26.Rc1 c4 27.g4 d4 28.Ne4 Rd8 (28...de3 A) 29.Nd6? ed2 (29...Bd6?! 30.de3 Ba3 31.Rc2=) 30.Rd1 Bd6 31.Nh5 Kf7 32.Rd2 c3-+; B) 29.de3 Rd8 30.Kf2-+) 29.Kf2 (29.ed4 Rd4 30.Kf2 Rd8-/+) 29...de3-+ 30.de3 Rh8 31.Kg3 Bd7 32.Nh5 Kg6 (32...Kf7 33.Nf4-+) 33.Nf4-/+ Kg7 34.Nh5 Kf7 35.Nf4 Rh6 (35...Bb5?! 36.Rb1 Bc6 37.Rb6=) 36.Rb1 Nc8 37.Kg2 Nb6 38.Kg3 Nc8 39.Kg2 Rb6 40.Nc3 Bf8 41.Nfd5 Rd6 42.e4 Nb6 43.Nb6 Rb6 44.e5 Bg7 45.Rd1 Bc8 (45...Bb5?! 46.Rb1=+) 46.Re1 Rg6 47.Kg3 Bd7 48.Kf4 Re6 49.g5 (49.Re4 Re8-+) 49...Kg6 50.b6 Rb6 51.Nd5 (51.Rd1 Be6 52.Rd2-+) 51...Rb5 52.Nf6 Bc6 53.Kg4 (53.Ng8 Be5! 54.Ke3 Rb3 55.Kf2 Bd4 56.Kg3 Kg5 57.Rf1-+) 53...c3 54.f4 (54.Kf4 c2 55.Rc1 Rc5-+) 54...Rb4 55.Rc1 Rc4 56.Kg3 (56.Ng8 Bf8 57.Nf6 c2 58.Rc2 Rc2 59.f5 Kg7 60.Nh5 Kg8-+) 56...c2 57.Kg4 (57.Ng4 Bf8 58.Ne3 Rc3-+) 57...b5 58.Ng8 (58.Rc2 Rc2 59.f5 Kf7 60.e6 Ke7 61.Nh5 Rc4 62.Kh3-+) 58...Bd7 59.Kf3 b4 60.Ne7 (60.Nf6 Bc6 61.Ke3 b3-+) 60...Kf7 61.Nd5 b3 62.g6 Kg8 63.Ne3 b2 64.Rc2 (64.Rg1 Rc3 65.Rb1 cb1Q 66.e6 Qg1 67.Ke4 Be6 68.f5 Qe3) 64…Rc2 (64...Rc2 65.Kg3 b1Q 66.Nc2 Qc2 67.e6 Bc6 68.Kg4 Bf6 69.Kh5 Bf3 70.Kh6 Qh2) 0-1. DEFFM – GuestVLMG, freechess.org, 2021.

5.c4 Nh6 6.Nf3 Nf7 7.Be2 Nd7 (7...dc4 8.Bc4 Nd6 9.Be2=) 8.0-0 Nb6 9.Qc2 (9.d3 e5+=) 9...Bd6 (9...Nc4 10.Bc4 dc4 11.Qc4=) 10.d4 dc4 11.dc5 Bc5 12.Bc4 Nc4 13.Qc4 Be7 14.a4 0-0 15.Nbd2 Bd7 16.Qb3 Rc8 17.Rfc1 Bc5 (17...e5 18.Qd5 Rc1 19.Rc1=) 18.Ne4+= Be7 19.Rc8 Bc8 20.Rd1 Qa5 21.Ba3 Ba3 22.Qa3 Rd8 23.Rd8 Qd8 24.Qb3 f5 25.Nc5 b6 26.Nd3 (26.Ne6? Be6 27.Qc2 Bd5-+) 26...Qd6 (26...Bb7 27.Nd4 Bd5 28.Qa3+=) 27.h3 (27.Qc4 Bb7+=) 27...Bb7= 28.Nd4 Bd5 (28...Be4 29.Nb4 e5 30.Ne6=) 29.Qc3+= g6 30.Nf4 e5 31.Nd5 Qd5 32.Qb3 (better is 32.Qc6!? Qd6 33.Qd6 Nd6 34.Nc6+/–) 32...Qb3= 33.Nb3 Nd6 34.Kf1 Nc4 35.Ke2 Kf7 36.f4 Ke6 37.g4 fg4 38.hg4 ef4 39.ef4 Kd5 40.Kf3 Nb2 41.a5 Nc4 42.ab6 ab6 43.f5 (43.g5 Nd6-/+) 43...g5 (better is 43...gf5!? 44.gf5 Nd6-+) 44.Nc1+= Ne5 45.Kg3 Kc4 46.Ne2 (46.f6 Kd5+=) 46...Kb5-/+ 47.Nc3 Kc4 48.Ne4 h6 49.Nd6 Kd4 (49...Kd5 50.Nb5 Kc5-/+) 50.Nb5 (50.f6!?-/+) 50...Kc5-+ 51.Nc3 b5 52.f6 (better is 52.Kh3-+) 52...b4 53.Nd1 (53.Na2 b3 54.Nc3 Kd6-+) Kd6 0–1. Alexandr,Petr (1665) – Reznicek,Marcel (2070), Ostrava CZE, Ostravsky Konik, 2014.

5.Qh5 g6 6.Qf3 Bd7 (6...Bg7 7.d4=) 7.c4+= Bg7 (7...Bc8!?+=) 8.cd5+- Ne7 (8...e5 9.e4+-) 9.Nc3 (9.Bf6?! Rf8 10.d6 Qb6 11.de7 Rf6+=) 9...0-0 (9...Nd5!? 10.Nd5 ed5 11.Qd5 Qb6+-) 10.d6+- Nd5?? (10...Nc8 11.Qb7 Nb6+-) 11.Nd5 ed5 12.Qd5 Kh8 13.Qb7 Nc6 (13...Qb6 14.Qa8 Nc6 15.Qf8 (15.bc6?! Ra8 16.Ba3 Qc6+=) 15...Bf8 16.Bf6 Bg7 17.Bg7 Kg7 18.bc6 Qc6 19.Rc1+-) 14.bc6 Rb8 15.Qd7 Rb2 (15...Qd7 16.cd7 Rb2+-) 16.Qd8 Rd8 17.c7 Rc8 18.d7 (better 18.Ba6 Bf8 19.d7 Rc7+-) 18...Rc7 19.d8Q. guest170 – Chess_ster, chessclub.com, 2018.

5.a4 c6 6.c4 cb5 7.d4?? bc4?? (7...Bb4 8.Bc3 Bc3 9.Nc3 bc4 10.e4-+) 8.Bc3?? (8.dc5 Qa5 9.Nc3 Ne7+=) 8...Nc6?? (better 8...Be7-+) 9.dc5+= a5 (9...Qe7 10.Qh5 g6 11.Qf3+=) 10.Be2 (10.Na3 Nh6+/-) 10...Qe7 11.Bd4 (11.Na3!? Qc5 12.Nb5+/-) 11...e5+= 12.Bb2 Qc5 13.Nf3 Nh6 14.Nbd2 (14.Nc3 Nb4 15.0-0 0-0+=) 14...0-0?? Black prepares d4 (better 14...c3 15.Ba3 cd2 16.Qd2 Nb4-/+) 15.Rc1 (15.e4 Be6 16.ed5 Bd5+/-) 15...Nb4 (15...Be6!?+=) 16.e4+/- d4 (16...Be6!? 17.ed5 Qd5 18.Nc4 Rfd8 19.Qd5 Nd5+/-) 17.Bc4+- Kh8 18.Qb3 Qe7 19.0-0 d3? (better 19...Bd7+-) 20.Ba3 Bd7 21.Bb4 (21.Bd3 Rfd8+-) 21...ab4 (21...Qb4 22.Ra1+-) 22.Bd3 Ba4 23.Qb2 b3 (23...b5 24.Rb1 Rfd8 25.Be2+-) 24.Nb3 Bb3 25.Qb3 Rfd8 26.Be2 Ra3 27.Qb2 Ng4 28.h3 Nh6 29.Rfd1 Ra4 (29...Rd1 30.Rd1 Ra4 31.Rc1+-) 30.Re1 (better 30.Rd8 Qd8 31.Qb7+-) 30...Re4 31.Bf1 (31.Red1 Rb8+-) 31...Rf4 Black prepares the advance e4 (31...Re1 32.Re1 Nf5 33.Qb1+-) 32.Rcd1 e4? (32...Rc8 33.Bd3 Rb4 34.Qe2+-) 33.Nd2 (33.Rd8 Qd8 34.Qb7 Ng8+-) 33...e3 (33...Nf7 34.Qc2+-) 34.Re3 Qe3 (34...Qf7+-) 35.fe3 Rfd4 (35...Rf5+-) 36.Nf3 (better 36.ed4 Rb8 37.Qb6+-) 36...Rd1 37.Kh2?? (37.Nd4 Rc8 38.Kf2 Ra8+-) 37...Nf5?? (better 37...Rf1 38.Qb7 Ra1=+) 38.Be2 (38.e4 Rf1 39.ef5 Rb8+-) 38...R1d7 39.e4 Ne7 (better 39...Nd6 40.e5 fe5 41.Ne5 Re7+-) 40.e5 fe5 (40...Ng8 41.Bc4 Re7+-) 41.Ne5 (41.Qe5?! Nc6 42.Qf4 h6+-) 41...Rc7 (41...Nc6 42.Nd7 Rd7+-) 42.Nf7 Kg8 43.Nd8 Ng6 44.Bf3 (44.Bf3 Re7 45.Bd5 Kf8 46.Nb7+-) 1-0. mordor1 (2155) - CheessyCharacter (2135), Rated Bullet game, lichess.org 2015.

5.a4 Bd7 6.d4 Bb4 7.c3 Bd6 8.c4 Ne7? (better 8...dc4 9.Bc4 a6+=) 9.c5+- Bc5 10.dc5 0-0 11.Bd3 f5 (11...e5 12.Ne2+-) 12.Nd2 Ng6 13.h4! Nh4 (13...Ne7+-) 14.Qh5 Ng6 (14...g5 15.Nh3 Be8 16.Qg5 Bg6+-) 15.Qh7 Kf7 16.Qg7 Ke8 17.Qg6 Rf7 18.Rh8 Ke7 19.Qg5 Rf6 20.Qf6 1-0. PEREIRA – Tammt, internet, 2022.

5.c4 dc4?? (better is 5...Nh6=) 6.Qh5+- Kf8 7.Qc5 (7.Qc5 Ne7 8.Bc4+-) 1–0. Rosner,Dirk – Salewski, corr DDR/I23, 1985.

5.g3 a5 (5...e5 6.d4 ed4 7.Bd4 Bd4 8.Qd4=) 6.a4 (6.d4 Bb4 7.c3 Be7=) 6...b6 7.Bg2 Bb7 8.Nf3 Nd7 9.Qe2 (9.0-0 Nh6+=) 9...Ne7 10.Nd4 Bd4 (10...Nf8 11.Qh5 Neg6 12.f4+=) 11.ed4+= Nf5 (11...Kf7!?+=) 12.Qe6+/- Ne7 (12...Qe7 13.Qe7 Ne7 14.Nc3+/-) 13.0-0+- Bc8 (better 13...Nf8 14.Qe2 Nfg6+-) 14.Re1?? (better 14.Ba3 Nf8 15.Qe2+-) 14...Nc5?? (better 14...Ne5! 15.de5 Be6 16.ef6 gf6 17.Re6 Qd7=+) 15.Qd5 (better 15.Qc6! Bd7 16.Qd5 Bb5 17.ab5 Qd5 18.Bd5 Nd3 19.cd3 0-0-0+-) 15...Qd5 16.Bd5 Ra7 (16...Bb7 17.Nc3 Rd8 18.dc5 Bd5 19.cb6 c6+-) 17.dc5 bc5 (17...Kd8 18.Be4 Bh3 19.Bd4+-) 18.d4 (18.Ba3 c6 19.Bc5 cd5 20.Ba7 Kf7+-) 18...cd4 (18...Kd8 19.Bg2 Nf5 20.dc5+-) 19.Bd4 c6 (19...Kd7 20.Re7! Ke7 21.Ba7+-) 20.Bc6 Kf7 21.Ba7 Rd8 22.c4 (better 22.Bg2 Bf5+-) 22...Rd2 23.Nd2 1-0. oo313oo (1620) - Shindin_Vladimir (1615), Rated Classical game, lichess.org, 2013.

5.a4 cb5 6.ab5 b6 7.c4 dc4 (7...Bb7 8.Nc3+=) 8.Bc4 g6?? (better 8...Bb7 9.Nf3 Bd5 10.Bd5 Qd5+/-) 9.Qf3+- Qc7 (9...Nc6 10.bc6 Qc7 11.Nc3+- (11.Bf6?! Nf6 12.Nc3 Kf7+-)) 10.Qa8 Bb7 (10...Bd6 11.Bf1+-) 11.Qa7 Qc4 (11...Bd6 12.Nf3 e5+-) 12.Qb7 Nd7 (12...Qb5 13.Qb8 Kf7+-) 13.Ra8 Ke7 14.Ba3 Kf7 15.Qd7 Ne7 16.Rf8 Rf8 (16...Kg7 17.Qe7 Kh6 18.Rh8 Kg5 19.Bb2 Qc1 20.Bc1 h6 21.h4 Kf5 22.Re8 g5 23.Qe6 Kg6 24.h5 Kg7 25.Qd7) 17.Qe7 Kg8 18.Qg7! (18.Qf8?!=) 18...Kg7 19.Bf8 Kf8 20.Nc3 Kf7 21.f4 e5 22.fe5 fe5 23.Nf3 e4 (23...Kf6+-) 24.Ne5 (24.Ne5 Ke6 25.Nc4+-) 1-0. WG_Anonymous – Anonymous, lichess.org, 2021.

5.a4 cb5 6.ab5 b6 7.Bd3 Nh6+=.

5.a4 cb5 6.ab5 b6 7.Qh5 g6 8.Qf3 Bc5 (8...e5 9.Nc3 Bb7 10.Be2+=) 9.d4 (9.c4 a5+=) 9...Bd6 10.c4 Bb7 11.cd5 (11.Nc3 Bb4+=) 11...Bd5 (11...f5 12.Bc4+=) 12.e4 f5?? (better 12...Bb7+=) 13.ed5+- Bb4 (13...ed5 14.Bc4! Nf6+-) 14.Bc3 Bc3 15.Nc3 (15.Qc3?! ed5 16.Nf3 Nf6+-) 15...ed5 (15...Nd7 16.de6 Ndf6 17.Nge2+-) 16.Qd5 (better 16.Nd5 a5 17.ba6 Ne7 18.Bb5 Kf7+-) 16...Qd5 (16...Nd7 17.Bc4 Nh6 18.Nf3+-) 17.Nd5 Kf7 (17...Kd7 18.Nf3 Kd6 19.Nb6 ab6 20.Ra8+-) 18.Nc7 (18.Bc4 Kg7 19.Nc7 a5 20.Na8 Nd7+-) 18...Ne7 (18...a5 19.Bc4 Ke7 20.Na8+-) 19.Na8 Nd7 (19...Nbc6 20.bc6 Ra8 21.c7+-) 20.Bc4 Kf6 21.Ra7 Nb8 (21...Rd8 22.Nc7+-) 22.Nb6 Re8 23.Ne2 f4 24.0-0 (better 24.Rb7!? Nf5 25.Rb8 Rb8 26.Nd7 Ke7 27.Nb8 f3 28.Nc6 Ke8 29.gf3 Ne7+-) 24...f3 25.Ng3 fg2 26.Re1 Nec6 27.Rf7 Kg5 28.Re8 Nd4 29.Ne4 Kg4 30.Kg2 Nf5 (30...h6 31.Nd5 Nf5 32.Nef6 Kg5 33.Nh7 Kh4 34.Re4 Kh5 35.Ndf6) 31.Be2 Kh4 32.Rh7 (32.Rh7 Nh6 33.Rh6) 1–0. DEFFM – GuestPHVV, freechess.org, 2018.

5.a4 b6 6.Bd3 Bb7? (better 6...Ne7!?+-) 7.Qh5+- Kd7 8.Nf3 Qe7 (8...a6 9.Na3+-) 9.0-0 e5 (9...Nh6 10.e4+-) 10.a5 (10.Nc3 Nh6 11.bc6 Bc6+-) 10...e4 (10...Nh6 11.ab6 ab6 12.Nc3+-) 11.a6 Bc8 (11...Na6 12.ba6 Bc8+-) 12.bc6 Nc6 13.Qd5 Kc7 (13...Qd6 14.Qe4 Qe6 15.Qa4+-) 14.Nd4 Nd4 (14...Qd7 15.Qe4 Nd4 16.Qa8+-) 15.Qa8 (15.Qd4 ed3 16.Ba3 Qe8 17.cd3 Bd7 18.Bf8 Qf8 19.Rc1 Kd8+-; 15.ed4 Rb8 16.Nc3 Bd7 17.Nb5 Kd8+-) 15...ed3 (15...Kd8 16.Be4 Nb5 17.Nc3+-) 16.Qa7 Kc6 17.Qa8 Kc7 (17...Bb7 18.ab7 Qb7 19.Qa4 Kc7 20.Bd4 Qc6 21.Qa7 Kc8 22.cd3 Ne7+-) 18.Bd4 (18.Bd4 Bd7 19.Qb7 Kd6 20.Qb6 Bc6 21.a7+-) 1–0. DEFFM – GuestKDQR, freechess.org, 2019.

5.a4 c5 6.c4 dc4 7.Bc4 b6?? (7...Bd6 8.Nc3+=) 8.Nf3 (better 8.Qh5 g6 9.Qf3+-) 8...Bb7 (8...a6 9.0-0+=) 9.0-0 (9.Be6 a6+/-) 9...e5 (9...Bd5 10.Bd5 ed5 11.Nc3+/-) 10.d4 (10.Ne5 fe5 11.Qh5 Kd7 12.Qh3 Ke8 13.Bg8 Qd6+-) 10...Bd6 (better 10...cd4!? 11.ed4 e4+/-) 11.de5+- Bc7 (11...Be5 12.Be5 fe5 13.Ne5+-) 12.ef6 (better 12.Qb3 Ke7 13.e4+-) 12...Qd6?? (better 12...Nf6 13.Qd8 Bd8+-) 13.Qd6 Nf6 14.Qc7 (14.Bf7! Kf7 15.Ne5 Kg8 16.Qe6 Kf8 17.Qf7) 14...Bf3+- 15.Qf7 (15.Qg7 Rf8 16.Bf6 Rf6 17.Qf6 Bg4 18.Qf7 Kd8 19.Qf8 Kc7 20.Qf4 Kd7 21.Qg4 Ke7 22.Qg7 Kd8 23.Rd1 Kc8 24.Be6 Nd7 25.Qd7 Kb8 26.Qc8) 15...Kd8 16.Qg7 Re8 17.Bf6 Kc8 18.gf3 Nd7 (18...h6 19.Rd1 Nc6 20.Qd7 Kb8 21.Qe8 Nd8 22.Qd8 Kb7 23.Rd7) 19.Bg5 (19.Rd1 Nf6 20.Qf6 Kb7 21.Qc6 Kb8 22.Qe8 Kc7 23.Rd7) 19...Kc7 (19...Rb8 20.Be6! Rb7 21.Rd1 Rc7 22.Rd7 Kb7 23.Rc7 Kb8 24.Rb7 Ka8 25.Ra7 Kb8 26.Qc7) 20.Bf4 Kb7 (20...Kd8 21.Rd1 Re7 22.Qf8 Re8 23.Rd7 Kd7 24.Qd6 Kc8 25.Qc7) 21.Bd5 (21.Qd7) 21...Kc8 22.Rd1 (22.Bb7 Kd8 23.Rd1 Re7 24.Qf8 Re8 25.Rd7 Kd7 26.Qd6) 22...Rb8 (22...Rd8 23.Bb7! Kb7 24.Rd7 Kc8 25.Rc7 Kb8 26.Rc5 Rd6 27.Bd6) 23.Bc6 Kd8 (23...Rd8 24.Bd7 Kb7 25.Bc6 Kc8 26.Qc7) 24.Qd7 1-0. BeepBeepImAJeep (2670) – anscariusbarcino, lichess.org, 2016.

5.a4 Bd6 6.c4 Bc7 7.Nf3 Ne7 8.Be2 g5?? (better 8...e5!?=) 9.Ng5! h6? (9...fg5 10.Bf6 Double attack (10.Bh8 Pinning; 10.Bh8 Deflection; 10.Bf6 Decoy)) 10.Bh5+- (10.Bf6?! 0-0 11.Be7 Qe7+-) 10...Kd7 11.Nf7 Qf8 12.Nh8 (12.Bf6?! Rh7 13.Ne5 Kd8+-) 12...Qh8 13.0-0 e5 14.cd5 Nd5 15.Bg4 (15.d4 f5+-) 15...Kd8 16.Bc8 Kc8 17.Nc3 e4 (17...Nc3 18.Qg4 Kd8 19.dc3 Bd6+-) 18.Ne4 Qg8 19.Ng3 (19.Qh5 Nd7+-) 19...Bg3 20.fg3 h5 (20...Qe6 21.Qh5+-) 21.Qh5 Nd7 22.bc6 bc6 23.Rac1 Kc7 24.e4 Ne7 (24...N5b6 25.Bf6 Qe6 26.a5+-) 25.Qa5 Kd6 (25...Nb6 26.Bf6 Ng6 27.d3+-) 26.Ba3 c5 (26...Ke6 27.Rc6 Kf7 28.Rd6+-) 27.Bc5 (27.Rf6 Qe6 28.Bc5 Nc5 29.Qc5 Kd7 30.Qc7 Ke8 31.Re6 Kf7 32.Qe7 Kg8 33.Rg6 Kh8 34.Qh4) 27...Nc5 (27...Ke6 28.Qa6 Kf7+-) 28.Qc5 (28.Rf6 Kd7 29.Qb5 Kc8 30.Rc5 Nc6 31.Qc6 Kd8 32.Qd6 Ke8 33.Re5 Qe6 34.Ree6) 28...Ke6+- 29.Qc4 Ke5 30.d4 Ke4 (30...Kd6 31.Rf6 Kd7 32.Qb5 Nc6 33.Qc6 Ke7 34.Qd6 Ke8 35.Qe5 Qe6 36.Qe6 Kd8 37.Rf8) 31.Rce1 1-0. BeepBeepImAJeep (2685) - anscariusbarcino (1605), lichess.org, 2017.

5.a4 Bd6 6.c4 Ne7 7.Nf3 0-0 8.Be2 Bb4 9.0-0 e5 10.Qb3 Bd6 11.cd5 cd5 12.Nc3 Be6 13.Qc2 (13.e4!? Nd7 14.ed5+=) 13...b6 (13...Nd7 14.Qb3=) 14.d4+= e4 15.Nd2 Nd7 16.f3 (16.Qb3 f5+=) 16...f5 17.fe4 de4 (better 17...fe4!? 18.Qb3 Bf7=) 18.Bc4+- Bc4 19.Nc4 Rc8?? (better 19...Nf6!?+-) 20.Qb3 (20.Nd6 Rc7 21.Qb3 Kh8 22.Nf7 Rf7 23.Qf7 Nf6+-) 20...Nf6?? (better 20...Rc4 21.Qc4 Kh8+-) 21.Nd6 Kh8 22.Nf7 (22.Nc8!? Qc8 23.Ba3 Re8+-) 22...Kg8 (22...Rf7 23.Qf7 Rc7+-) 23.Nd8 (23.Nd8 Kh8 24.Nf7 Kg8 25.Nd6 Kh8 26.Nc8 Rc8 27.Qf7+-) 1–0. GuestRTZD – GuestZRRD, freechess.org, 2019.

5.a4 Bd6 6.c4 Ne7 7.Qh5 Ng6 8.Bd3 0-0 9.cd5 f5 (better 9...ed5 10.Nf3 Nd7=) 10.Nf3+- Re8?? (better 10...Qe8 11.dc6 Ne5 12.Qe8 Nd3 (12...Re8?? 13.Be5 Rd8 14.Bc4 bc6 15.Nc3+-) 13.Ke2 Re8 14.cb7 Bb7 15.Kd3 e5+-) 11.Ng5+- Nf8 (11...Qg5 12.Qg5 cd5+-) 12.Qf7 (12.Qf7 Kh8 13.Qg7) 1–0. GuestQCPJ – GuestQSRM, freechess.org, 2020.

5.a4 Bd7 6.Nf3 Bd6 7.c4 Nh6 8.Be2 0-0 9.Qc2 e5 10.d3 Be6 11.Nbd2 Nd7 12.0-0 Rc8 13.Rfc1 Bg4 14.Qd1 Qe7 15.h3 Bf3 16.Bf3+/– Nc5 17.bc6 bc6+= 18.Qc2 Nd3? 19.Qd3+- e4 20.Ne4! de4 21.Be4 Rcd8 22.Bh7 Kh8 23.Qc2?? f5=+ 24.Bg6 Qg5. algernon (2155) – patzerx (2525), net–chess.com, 2003.

5.c4 cb5 6.cb5 a6 7.a4 Bd7 8.Nf3 Bd6 9.Be2 Ne7 10.0-0 ab5 11.ab5 Ra1 12.Ba1 Qb6 13.Qb3 0-0 14.Bb2 Rc8 15.Rc1 Rc1 16.Bc1 e5 17.Bb2 Kf7 18.g3 (18.d4 e4 19.Nfd2 Be6+=) 18...g5 19.Ne1 h5 (better is 19...g4!?=) 20.Bh5+/– Ke6 (20...Kg7 21.Nc3 Na6+/–) 21.Nf3?? (better is 21.Nc3 f5 22.e4 fe4 23.Ne4+-) 21...Bb5?? (better is 21...Qb5 22.Qc2 Qc4+=) 22.d4 (better is 22.Nc3+-) 22...e4 23.Nfd2 Nd7 24.Ne4 Bc4 25.Qc2 Qc7?? 26.Nd6+- Kd6 27.Ba3 Ke6 28.Qh7 Qb6 29.Bf7 1–0. Valpa – Epenz, playchess.de, 2005.

5.Qh5 g6 6.Qd1 Bd7 7.a4 (7.Nc3 Qa5=) 7...Bc5 (7...e5 8.Nc3=) 8.Nf3 e5 (8...Bd6 9.Be2=) 9.Be2 (9.d4 Bb4 10.c3 Bd6+=) 9...cb5 (9...Ne7 10.d4 Bb4 11.c3+=) 10.ab5+= a6 (10...Bd6 11.Ba3 Bg4 12.0-0+=) 11.0-0 (11.d4 ed4 12.Bd4 Bd4 13.Nd4 Ne7+-) 11...Qb6 (11...Bd6 12.ba6 Na6 13.Nc3+=) 12.c4 (12.d4 Be7 13.de5 Bb5+-) 12...dc4+= 13.Nc3 (13.Bc4 Bb5 14.Ne5 Bc4 15.Nc4 Qe6+=) 13...Ne7 (13...Bb5 14.Ne5 fe5 15.Nb5 Nd7 (worse 15...Qb5 16.Be5 Nf6 17.Bf6+-) 16.Bc4 Rd8=) 14.Bc4+- Nf5 (14...Bg4 15.h3 Bd7 16.d4 ed4 17.Nd4 Bd4 18.ed4+-) 15.Qb3 (better 15.Nd5 Qd8 16.d4 ed4 17.Nd4+-) 15...Nd6 16.Be6?? (better 16.Nd5 Qd8 17.b6+-) 16...Be6?? (16...Bb5 17.Nd5 Qd8 18.Nf6 Qf6 19.Be5 Qe7+-) 17.Qe6+- Kd8 (17...Kf8 18.Na4 Qd8 19.Nc5 Qe7 20.Ne5 fe5 21.Be5 Qe6 22.Ne6 Ke7+-) 18.Nd5 Re8 19.Qf6 (19.Qf6 Kd7 20.Ne5 Re5 21.Qg7 Nf7 22.Nb6 Bb6 23.Be5+-) 1–0. GuestPCKQ – GuestQWCX, freechess.org, 2016.

5.c4 a6 6.cd5+= ed5 7.Qh5 g6 (7...Kf8 8.Nc3+=) 8.Qd5+- c6 1–0. GuestRZBS – GuestZPXM, freechess.org, 2019.

5.c4 dc4 6.Bc4 Qe7 7.a4 b6 (7...e5 8.d4=) 8.Qf3+= c6 9.Ne2 Bb7 10.Qh5 g6 11.Qh3 f5?? (better 11...e5+=) 12.Bh8+- cb5 13.ab5 Nd7 14.0-0 0-0-0 (14...Ngf6 15.d4+-) 15.Ra7 Nc5 (15...g5 16.Nd4 g4 17.Qh5+-) 16.Nbc3 (16.Rc1 Kb8 17.Ra2 Ne4+-) 16...Kb8 (16...Bg2 17.Kg2 Qa7+-) 17.Rfa1 Nb3 (17...Rc8+-) 18.Bb3 Nf6 19.Bf6 Qf6 20.Rb7! Kb7 (20...Kb7 21.Qf3 Mate attack) 21.Qf3 Kc7 (21...Kc8 22.Qc6 Kb8 23.Ra8) 22.Qc6 (22.Qc6 Kb8 23.Ra8) 1-0. DEFFM – GuestMHCB, freechess.org, 2021.

5.c4 c6 6.a4 Ne7 7.Qh5 Ng6 8.Nf3 0-0 9.Bd3 (9.cd5 cd5 10.Bd3 Qe8+=) 9...Qe8 (9...dc4 10.Bc4 a6 11.Nc3=) 10.cd5 cd5 11.0-0 Nd7 12.Rc1 Nde5 (better 12...f5!?+=) 13.Be5+- Be5 14.Ne5 fe5 15.Bg6 Qg6 16.Qe5 (16.Qg6 hg6 17.d3 a6+-) 16...Qf7 (16...a6 17.ba6 Ra6 18.Nc3+-) 17.f4 Bd7 (17...Qg6 18.Nc3+-) 18.Rc7+- Rac8 (18...Rab8 19.Nc3+-) 19.Rb7 Rc1 20.Kf2 Qe7 21.Kg3 Qe8 22.Na3 Qg6 (22...Ra1 23.Qa1 a6 24.Qe5 ab5 25.Nb5+-) 23.Kf2 Ra1 24.Qa1 Bc8 (24...Be8 25.Ra7 Rf7 26.b6+-) 25.Ra7 e5 (25...Rd8 26.Qe5 d4 27.Qg5 Qg5 28.fg5+-) 26.Qe5 1–0. DEFFM – receficebrumbrum, freechess.org, 2019.

5.c4 c6 6.cd5 cd5 7.Nf3 e5 8.Nc3 Ne7 9.Qb3 Be6 10.Be2 (10.d4 Nd7=) 10...0-0 (10...Nd7 11.d4=) 11.e4 Bc5 (11...Nd7!? 12.d4 ed4 13.Nd4 Bf7 14.ed5 Nc5=) 12.ed5+- Bf7 (12...Nd5?? 13.Bc4 e4 14.Nh4+- (14.Bd5?! Bd5 15.Nd5 ef3+-; 14.Nd5 ef3 15.Nf6 Kh8 16.Be6 fg2+-)) 13.Ne4 (13.Bc4 Nd7 14.Ne4 Nf5+-) 13...Bd6 (13...b6!?+-) 14.Bc4 (better 14.Rc1+-) 14...Kh8? (better 14...a6!? 15.Nd6 Qd6+-) 15.0-0 a5 16.Nd6 Qd6 17.Ba3 Qd7 18.Be7 (18.Rac1 a4 19.Qb1 Re8 20.Be7 Re7+-) 18...Qe7 19.d6! Qd7 (19...Qd6 20.Bf7 Discovered attack (20.Bf7 Deflection)) 20.Bf7 Rf7? (20...Qf7 21.Qf7 Rf7+-) 21.Rac1 Rf8 (21...Qe8 22.Qd5 Nd7 23.Rc7+-) 22.Qd5 Qd8 (22...Na6 23.ba6 Ra6 24.Rc7 Qd6 25.Qb7+-) 23.Qb7 Nd7 24.Rc7 Rf7 (24...Rb8 25.Qc6 (25.Rd7 Rb7 26.Rd8 Rd8-/+) 25...Nb6 26.Re1+-) 25.d4 (25.b6!? Rb8 26.Qd5 Qg8+-) 25...Rb8 26.Qd5 e4 (26...Qg8+-) 27.Qf7 1–0. GuestQCPJ – GuestQSRM, freechess.org, 2020.

5.c4 Ne7 6.Nc3=.

5.Bd3 Bd7 6.Nf3 c6 (6...e5 7.e4=) 7.a4 (7.Ng5 Ke7 8.Nh7 Nh6+=) 7...c5 (7...e5!? 8.e4 Ne7=) 8.Ng5+= h6?? (better 8...Nh6+=) 9.Qh5 (9.Qh5 g6 10.Qg6 Ke7 11.Qf7) 1–0. DEFFM – GuestSJWH, freechess.org, 2018.

5.Nf3 Ne7 6.d4 c5 7.c4 b6 8.Nbd2 Bb7 9.Be2 Nd7 10.0-0 0-0 11.a4 a5 12.Qb3 Qc7 13.Rac1 Rac8 14.h3 Qb8 15.cd5 ed5 16.dc5 Nc5 17.Qa2 Kh8 18.Nd4 Be5 19.N2f3 Ng6 20.Nf5 (20.Rfd1 Qd6+=) 20...Ne4 (Better is 20...Bb2!? 21.Qb2 Na4 22.Rc8 Bc8=) 21.Rc8 Rc8 22.Be5 fe5=+ 23.Qb2 Nc3 24.Bd3? e4-+ 25.Rc1 ed3?? 26.Rc3+/– d4 27.Rc8 Qc8+/– 28.N3d4 Ne5 29.Nd6 Qc7? 30.Nb7 Qb7+/– 31.Ne6 Qd5= 32.Nd4 Nc4 33.Qc3 d2 34.Qd3 h6 35.Kf1?? Qc5 0–1. revbodio1 – Laksman4, Live Game Caissa's Web, 2004.

5.Qh5 g6 6.Qf3 a6 7.a4 ab5 (7...Nd7 8.Ba3=) 8.ab5 Ra1 9.Ba1 c6 10.c4 cb5 (10...e5!?=) 11.cd5+= ed5 (11...b4 12.de6 Be6 13.Bb5 Nc6 14.Nh3+=) 12.Qd5 Ne7 (12...b4 13.Nf3+-) 13.Bb5 Nbc6 14.Qc4 Bd7 (14...Rf8 15.Nf3+-) 15.Bf6+- Rf8 16.Be7 (16.Bb2 Rf5+-) 16...Qe7 17.Nf3 Na5?? (better 17...g5+-) 18.Qc8 Kf7 19.Qd7 (19.Bd7? Rc8 20.Bc8 Qc7-+) 19...Nc6 (19...Qd7 20.Bd7 Ke7 21.Bb5+-) 20.Bc6 bc6 21.Qc6 Rb8 (21...Kg7 22.0-0+-) 22.0-0 h6 23.Nc3 g5 (23...Rd8 24.Rb1 Kf8 25.Ne4+-) 24.Nd4 Qe5 (24...Rd8 25.Qc4 Kg6 26.Nc6+-) 25.f4 gf4 26.Rf4 Ke7 (26...Kg8 27.Qc4 Kh8+-) 27.Nf5 Ke6 28.Nd6 Qd6 29.Re4 Kf7 (29...Kf5 30.Qd6 Rb1 31.Kf2 Rf1 32.Kg3 Rf3 33.gf3 h5 34.Re5) 30.Qd6 h5 (30...Re8 31.Qd7 Kg6 32.Rg4 Kf6 33.Nd5 Ke5 34.d4) 31.Re7 Kf8 32.Ra7 Kg8 (32...Ke8 33.Qb8) 33.Qb8 1–0. DEFFM – kajagtiani, freechess.org, 2018.

5.Qh5 g6 6.Qf3 Nd7 7.c4 dc4 8.Bc4=.

5.Qh5 g6 6.Qf3 Qe7 7.c4 (7.Be2 Nd7=) 7...c6 (7...dc4 8.Bc4 Nd7+=) 8.a4 (8.cd5 ed5 9.Nc3 Nd7=) 8...b6 (better 8...Nd7!?=+) 9.Nh3 Bb7 10.Nf4 c5 (10...d4!? 11.Qh3 Bf4 12.ef4 Qd6+=) 11.cd5 e5 (better 11...Bf4!? 12.Qf4 ed5+-) 12.Ne6+- Nd7 13.Bc4 Nf8 14.Qh3 f5 (14...Ne6 15.de6 (15.Qe6?! Qe6 16.de6 Bg2+-) 15...Qg7 16.Nc3+-) 15.f4! Ne6 (15...ef4 16.Bh8 Pinning (16.Bh8 Deflection)) 16.de6 0-0-0 17.fe5 (17.Be5?! Be5 18.fe5 h5+-) 17...Bc7 18.0-0 Kb8 19.d4 (19.a5 ba5 20.Ra4 h5+-) 19...cd4 20.ed4 (20.Bd4 h5+-) 20...Qb4 (20...Be5 21.Qe3 Bd6 22.h3+-) 21.Qb3 Qb3 22.Bb3 Ne7 23.Rf2 Rhe8 24.Nd2 a6 (24...Nd5 25.Ba3+-) 25.Nf3 (25.ba6 Ba6 26.Nf3 b5+-) 25...h6 (25...ab5 26.ab5 Bd5 27.Ra3+-) 26.Bc4 a5 27.Nh4 Be4 (27...f4 28.g4+- (28.Rf4?! g5 29.Rf7 gh4+-)) 28.Rc1 g5 29.Nf3 f4 (29...Bb7 30.h3+-) 30.h4 g4 (30...gh4 31.Ne1 Nd5 32.Bd3 Bd3 33.Nd3+-) 31.Ne1 f3 32.gf3 gf3 33.Nf3 Rg8 34.Kf1 Rdf8 35.Nd2 Rf2 36.Kf2 Rg2 37.Ke1 (better 37.Ke3 Bh7 38.Rf1+-) 37...Rh2 (37...Bb7 38.Ba3 Bd8 39.Bd6 Ka7+-) 38.Ba3 Bd8 (38...Rh1 39.Bf1 Bd5 40.Be7+-) 39.Bd6 (better 39.Ne4 Rh4 40.Bd6 Ka7+-) 39...Kb7 (39...Ka7 40.Ne4 Nf5 41.Nf6 Rh1 42.Bf1 Nd4 43.e7 Be7 44.Be7+-) 40.Ne4 Rh4 (40...Rh1 41.Kd2 Rh4 42.Kd3+-) 41.Nf6 Rd4 (41...Rh1 42.Kd2 Rc1 43.Kc1 Nf5+-) 42.Be7 Be7 43.Bd5 Kb8 (43...Rd5 44.Nd5 Kb8 45.Ne7 Ka7 46.Rc7 Kb8 47.Nd5 h5 48.e7 h4 49.e8Q) 44.Nd7 Ka7 45.Rc7 1–0. DEFFM – GuestJVWN, freechess.org, 2019.

5.Qh5 g6 6.Qh4 e5 7.c4 c6 8.cd5 cd5 9.Nc3 Be6 10.e4 (10.Bd3!? g5 11.Qh5 Bf7 12.Qd1=) 10...d4-/+ 11.Nd5 Bd5 12.ed5 Nd7 13.Bc4 Ne7 14.Nf3 (14.Rc1 Rc8 15.Qh3 Qa5-/+) 14...0-0 (14...Qa5!?-/+) 15.0-0=+ Kg7 16.Qe4 Rc8 17.d3 Nc5 18.Qh4 Nf5 19.Qh3 Na4 20.Bc1 Nc3 21.g4 Ne2 22.Kh1 Nc1 23.Rac1 Ne7 24.g5 f5 (24...Nf5 25.Rg1=+) 25.Rfe1= e4?? (better 25...Qc7=) 26.Nd4+- (worse 26.de4 Bc5 27.Qg3 f4+-) 26...Qb6 (26...Kg8 27.Ne6 (27.de4?! fe4 28.Qg2 Qd7+-) 27...Qa5 28.Nf8 Kf8 29.Qh7+-) 27.Ne6 Kg8 28.de4 Qf2 (28...fe4 29.Nf8 Rf8 30.Re4+-) 29.Nf8 Rc4 30.Nd7 (30.Rc4 A deflection 30...Qe1) 30...Rc1 (30...Kh8 31.ef5 (31.Rc4?? Qe1 32.Kg2 Qe2 33.Kg1 Qc4-+) 31...gf5 32.g6+- (32.Rc4 Qe1 33.Kg2 Qe2 34.Kg1 Qc4-+)) 31.Rc1 Be5 (31...h5 32.e5 Qd2 A) 33.ed6 Qc1 34.Kg2 Nd5-/+ (worse 34...Qg5 35.Qg3 Qg3 36.Kg3 Nd5 37.Ne5+=); B) 33.Qc3 Qd5 34.Kg1 Be5 35.Ne5 (worse 35.Qe5 Qd7 36.Re1 Nd5+-) 35...Qb5 36.Rd1+-) 32.Nf6 Bf6 33.gf6 Qd2 (33...Qf4 34.Re1 (34.fe7?! Qc1 35.Kg2 Qb2 36.Kf3 Qa3 37.Kf4 Qd6 38.Ke3 Qe7=) 34...Nc8 35.ef5+-) 34.Qa3 (34.Qc3 Qc3 35.Rc3 Kf7+-) 34...Qf4 35.fe7 (35.Qe7?! Qf3 36.Kg1 Qe3 37.Kg2 Qe2 38.Kg3 Qe3 39.Kg2 Qe2 40.Kg1 Qe3 41.Kf1 Qf3 42.Ke1 Qe3 43.Kd1 Qd3 44.Ke1 Qe3 45.Kd1 Qd3 46.Ke1 Qe3=) 35...Qe4 The passed pawn on e7 will quickly become a dangerous weapon 36.Kg1 Kf7 (36...Qd4 37.Kg2 Qd2 38.Kg3 Qg5 39.Kf3 Qg4 40.Kf2 Qf4 41.Qf3 Qh2 42.Kf1+-) 37.d6 Qd4 38.Kg2 Qg4 (38...Qd2 39.Kf3 Qd5 40.Kg3 Qe5 41.Kh3 Qe2 42.Qb3 Kg7 43.Qc3 Kh6+-) 39.Qg3 Qe2 40.Kh3 (40.Kg1 Qb5 41.Qe3+-) 40...Qh5= 41.Kg2 Do you see the mate threat? 41...Qe2 42.Kg1 Qb5 43.Qb3 (43.Qb3 Qb3 44.ab3 b5 45.Rc8 Kg7 46.e8Q Kh6 47.d7 Kh5 48.Qe2 Kh4 49.d8Q g5 50.Qd6 f4 51.Qh6) 1–0. DEFFM – GuestSLDX, freechess.org, 2020.

5.a4 Ne7 6.Nf3 c6 7.Be2 cb5 (7...e5 8.Nc3=) 8.ab5+= Qb6 (8...e5!?+=) 9.Bd4+- Qc7 (9...Qd6 10.Ba7 Na6 11.Bd4+-) 10.Ra7 Qc2 1–0. DEFFM – xxcheckmate, freechess.org, 2018.

5.Nc3 A) 5...Nh6 A1) 6.a4 Nf7 (6...Bc5 7.Qh5 Nf7 8.Nf3 0-0 9.Bd3 f5 10.0-0 Be8; 6...Bd6 7.Qh5 Nf7 8.Nf3 g6 9.Qh3 0-0 10.Be2 e5; 6...Be7 7.Qh5 Nf7 8.Nf3 0-0 9.Bd3 g6 10.Qh4 Ne5) 7.Nf3 Bc5 8.Bd3 0-0 9.0-0 Qe7 10.h3 a6; A2) 6.Nh3 a6 7.a4 ab5 8.ab5 Ra1 9.Qa1 Bc5 10.Nf4 0-0; A3) 6.Bd3 c5 7.Nh3 c4 8.Be2 Bd6 9.Nf4 0-0 10.0-0 Nf5; B) 5...f5 6.Qh5 g6 7.Qh3 Nf6 8.Nf3 Bd6 9.Be2 a6 10.0-0 ab5; C) 5...a6 C1) 6.Bd3 f5 (6...Nh6 7.a4 e5 8.Nh3 Be6 9.0-0 ab5 10.ab5 Ra1) 7.Qh5 g6 8.Qh3 Bg7 9.a4 ab5 10.ab5 Ra1; C2) 6.Nge2 ab5 (6...Ne7 7.a4 Ng6 8.h4 Bd6 9.h5 Ne5 10.h6 g6; 6...Nh6 7.Nf4 ab5 8.Bb5 c6 9.Bf1 e5 10.Nd3 Na6; 6...Bd6 7.Nf4 Bf4 8.ef4 Ne7 9.a4 0-0 10.Be2 d4) 7.Nf4 Ne7 8.Bb5 Nbc6 9.0-0 g6 10.d4 Kf7; C3) 6.a4 Bd6 (6...Bc5 7.Nh3 Ne7 8.Nf4 0-0 9.Be2 e5 10.Nd3 Bd6; 6...f5 7.Qh5 g6 8.Qh3 Nf6 9.Nf3 ab5 10.Nb5 Bg7; 6...ab5 7.ab5 Ra1 8.Qa1 Bc5 9.Nf3 Ne7 10.Ba3 Ba3) 7.Qh5 Kf8 8.Nf3 Ne7 9.Be2 ab5 10.Nb5 Bb4; C4) 6.Nh3 f5 (6...Bd6 7.Qh5 g6 8.Qh4 Kf7 9.Be2 c6 10.bc6 Nc6; 6...Ne7 7.Nf4 ab5 8.Bb5 Nbc6 9.0-0 g6 10.a4 Kf7; 6...Nh6 7.Nf4 ab5 8.Bb5 c6 9.Ba4 Bb4 10.Qh5 Nf7) 7.g4 Nh6 8.gf5 Nf5 9.Bd3 ab5 10.Bf5 ef5.

5.c4 c6 A) 6.Bd3 Ne7 (6...Nh6 7.Nc3 dc4 8.Bc4 a6 9.a4 Qc7 10.Qb3 ab5; 6...f5 7.Nc3 Nf6 8.cd5 cd5 9.Nf3 Bd6 10.0-0 0-0) 7.Nc3 dc4 8.Bc4 a6 9.Qh5 Ng6 10.Nf3 ab5; B) 6.cd5 ed5 (6...cd5 7.Bd3 f5 8.Be5 Nf6 9.Nc3 Bc8 10.Nf3 Nbd7) 7.Nc3 Ne7 8.Nh3 a6 9.bc6 Nbc6 10.Nf4 Qb6; C) 6.Nh3 Bd6 (6...Ne7 7.Nc3 Ng6 8.cd5 cd5 9.Qh5 Qe7 10.Rc1 Qf7; 6...Bc5 7.cd5 ed5 8.Qc2 Bd6 9.Nc3 Ne7 10.Bd3 a6; 6...dc4 7.Bc4 cb5 8.Nf4 Qb6 9.Bd3 Nc6 10.Qh5 Kd8) 7.cd5 ed5 8.Qh5 g6 9.Qh4 a6 10.Bd3 ab5; D) 6.Nc3 Ne7 (6...f5 7.bc6 bc6 8.Nf3 Nf6 9.d4 Qa5 10.Qd2 Na6) 7.Bd3 dc4 8.Bc4 a6 9.Qh5 Ng6 10.Bd3 f5.

5.c4 Bd6 A) 6.Nc3 Ne7 7.Qh5 g6 8.Qf3 0-0 9.cd5 e5 10.h4 h5; B) 6.cd5 Ne7 7.de6 Be6 8.Nf3 0-0 9.Qc2 Nd7 10.Nd4 Bf7; C) 6.Nf3 Ne7 (6...c6 7.Nc3 Ne7 8.Bd3 a6 9.a4 0-0 10.cd5 Nd5; 6...a6 7.cd5 ed5 8.Nc3 Ne7 9.Qb3 Bb5 10.Bb5 ab5) 7.Qc2 dc4 8.Bc4 a6 9.Nc3 ab5 10.Nb5 Bb5; D) 6.Qb3 d4 (6...c6 7.Nc3 Ne7 8.Nf3 0-0 9.cd5 Nd5 10.Bd3 Nc3; 6...Ne7 7.Nc3 c6 8.cd5 ed5 9.Nf3 0-0 10.Ne4 Bf5) 7.ed4 Ne7 8.c5 Bf4 9.Bc4 Kf7 10.Ne2 Bh6; E) 6.Bd3 Ne7 (6...dc4 7.Bc4 Nh6 8.Qh5 Nf7 9.Nf3 0-0 10.Nc3 a6) 7.Nc3 0-0 8.cd5 ed5 9.Nf3 a6 10.Qa4 c6; F) 6.Qh5 g6 (6...Kf8 7.Nc3 Ne7 8.cd5 ed5 9.Nd5 Be8 10.Qf3 Nd5) 7.Qf3 c6 8.cd5 ed5 9.Ne2 Qc8 10.h3 Bf5.

5.c4 Ne7 A) 6.Nf3 a6 (6...c6 7.Nc3 a6 8.Nh4 Kf7 9.a4 ab5 10.ab5 Ra1) 7.Qa4 Kf7 8.Nc3 c6 9.cd5 ed5 10.Rc1 cb5; B) 6.Nc3 dc4 (6...c6 7.Bd3 dc4 8.Bc4 Qb6 9.a4 Nd5 10.Nf3 Bb4) 7.Qf3 Nc8 8.Bc4 Nd6 9.Bd3 Be7 10.Ba3 Bc8.

5.Bd3 A) 5...f5 A1) 6.Ne2 Nf6 (6...a6 7.Nbc3 Nf6 8.Nf4 Bd6 9.0-0 0-0 10.a4 d4) 7.Nbc3 a6 8.Nf4 Bc5 9.a4 0-0 10.0-0 ab5; A2) 6.Nh3 Nf6 (6...a6 7.Nc3 Nf6 8.0-0 Bd6 9.f4 0-0 10.a4 Ne4) 7.Nc3 a6 8.Nf4 Bd6 9.0-0 0-0 10.a4 d4; A3) 6.Nf3 a6 (6...Nf6 7.c4 a6 8.Nc3 ab5 9.cd5 ed5 10.Nb5 Na6) 7.a4 Nf6 8.Nc3 Bd6 9.0-0 0-0 10.h3 Ne4; A4) 6.Be5 a6 (6...Nf6 7.Nc3 a6 8.a4 Bc5 9.Nf3 0-0 10.0-0 Ng4) 7.Nc3 ab5 8.Nb5 Bb5 9.Bb5 c6 10.Qh5 g6; A5) 6.c4 Nf6 (6...a6 7.cd5 Nf6 8.Nc3 ed5 9.Qf3 Bb5 10.Nb5 ab5; 6...dc4 7.Bc4 a6 8.Nc3 ab5 9.Nb5 Bb5 10.Bb5 Nc6; 6...c6 7.cd5 cd5 8.Nf3 Nf6 9.0-0 Bd6 10.Nc3 0-0) 7.Nc3 a6 8.cd5 ab5 9.Qb3 Nd5 10.Nd5 ed5; A6) 6.h3 a6 (6...Nf6 7.Nf3 a6 8.a4 Bd6 9.0-0 0-0 10.Nc3 Ne4) 7.Nc3 Nf6 8.a4 e5 9.h4 Bb4 10.Nh3 0-0; A7) 6.Nc3 Nf6 (6...a6 7.g4 Nf6 8.gf5 ef5 9.Qf3 ab5 10.Nge2 Ba3) 7.Nf3 Bd6 8.0-0 0-0 9.h3 e5 10.Be2 e4; B) 5...Nh6 B1) 6.Qh5 g6 (6...Nf7 7.Nf3 e5 8.Bh7 g5 9.Qg6 Bb5 10.Nc3 Bc6) 7.Qf3 Be7 8.Nc3 Nf7 9.Qg3 Ne5 10.Nf3 Nd3; B2) 6.a4 c5 (6...Nf7 7.Nc3 Ne5 8.Nf3 Nd3 9.cd3 a6 10.0-0 Bb4; 6...Be7 7.Nc3 0-0 8.Nf3 Bc8 9.0-0 Nd7 10.Nd4 Ne5) 7.c4 dc4 8.Bc4 Bd6 9.Qh5 Nf7 10.Nf3 0-0; B3) 6.Nc3 c5 (6...a6 7.a4 Nf7 8.Nf3 Bb4 9.0-0 0-0 10.Qe2 c5) 7.Nh3 c4 8.Be2 Bd6 9.Nf4 0-0 10.0-0 Nf5.

5.Qh5 Ke7?? 6.Ba3 c5 7.Bc5 1–0. GuestNTSW – GuestWTGH, freechess.org, 2017.

6.Nc3 c6 (6...Ne7 7.Bc4 a6 8.Nh3 Ng6 9.Qb3 Qc8 10.a4 ab5; 6...Nh6 7.Bc4 a6 8.Nge2 Ng4 9.Qb3 Ne5 10.Be6 Nd3; 6...a6 7.Bc4 Ne7 8.a4 ab5 9.ab5 Ra1 10.Qa1 Nf5; 6...Qe7 7.Qf3 Bc8 8.Qe4 Nd7 9.Nf3 Nb6 10.a4 f5) 7.Bc4 Ne7 (7...a6 8.a4 ab5 9.ab5 Ra1 10.Qa1 Qb6) 8.a4 (8.Qh5 g6 9.Ne4 Ng8+= (9...gh5?? 10.Nd6; 9...Bg7 10.Qh3 e5) 10.Qf3 cb5; 8.Nf3 cb5 9.Nb5 Bb5 10.Bb5 Nbc6) 8...cb5 (8...Nd5 9.Nf3 Bb4 10.Qb3 Bc3) 9.ab5 a6 (9...Nf5 10.Qb3 Qc8) 10.Qb3 (10.Qh5 Ng6) 10...Kf7 (10...Qc8+-) 11.Nf3 Nf5 12.Bd3 Qb6?? (better is 12...Nd6+/–) 13.Bf5+- Ke8 14.Bd3 a5 (14...Be7 15.0-0+-) 15.0-0 Bd6 (15...Kf7 16.Na4 Qd6 17.Qc2+-) 16.Na4 Qc7 (16...Qd8 17.Bd4 Bc7 18.Be4+-) 17.Bd4 Nc6 (17...Kf7 18.Rfc1 Qd8 19.Nb6+-) 18.bc6 bc6 19.Bb6 Qc8 20.Nc5 Bc5 21.Bc5 Rb8 (21...Qc7 22.Rfb1+-) 22.Qc2 e5 (22...Qc7 23.Bh7 Kd8 24.Qg6+-) 23.Ra5 (23.Bh7 Kd8 24.Qg6 Rb5 25.Qg7 Kc7+-) 23...Bg4 (23...Kd8 24.Rfa1 Qc7 25.Ra7+-) 24.Ra7 Rb7 25.Rfa1 (better is 25.Ba6!? Bf3 26.Rb7 Qg4 27.Re7 Kd8 28.Qd3 Bd5+-) 25...Ra7 (25...Bf3 26.Bf5 Qb8 27.gf3 g5 28.Qc4 Qc7 29.Qe6 Kd8 30.Qf6 Ke8 31.Qh8 Kf7 32.Qf8) 26.Ra7 Bd7 27.Bg6 Kd8 28.Bb6 Ke7 29.Qc5 Ke6 30.Qc4 Ke7 31.Qb4 Ke6 (31...c5 32.Bc5 Qc5 33.Qc5 Ke6 34.Ra6 Bc6 35.Qc6 Ke7 36.Qd6) 32.Bc5 hg6 33.Qc4 1–0. pcmvr (2810) – miodrag (2145), net–chess.com, 2010.

6.Bc4 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Bd6 10.Nc3 Ne7 11.Qb3 (11.Qg4 Nf5+=) 11...Kf7 (11...e5 12.Ne4+=) 12.Nf3 c6 (12...Nc8 13.d4+=) 13.0-0 (13.Ne4 Nc8 14.Nd4 Re8+-) 13...cb5 (13...Qb6 14.Nd4 Nd5 15.f4+-) 14.Nb5+- Bb5? (better 14...Nc8+-) 15.Be6+- (15.Qb5?! Nbc6+-; 15.Bb5?! Nbc6+-) 15...Kg6 (15...Kf8 16.Qb5 Qc7+-) 16.Bf7 (16.Qb5?! Qc7+-) 16...Kh6 17.Qb5 Nbc6 (17...Ng6 18.g4 Ne5 19.Be5 Be5 20.g5 fg5 21.Ne5 Qc8+-) 18.Qh5 1–0. GuestBKVF – GuestQZLK, freechess.org, 2018.

6.Bc4 a6 7.Nc3 Ne7 8.a4 Nf5 9.Nge2 Bd6 10.g4 ab5.

6.Bc4 c6 7.a4 Qa5 8.Qb3 (8.Nc3 Ne7 9.Ne4 Nd5 10.Qh5 Kd8 11.Bd5 cd5 12.Nf6 Qb4+-) 8...Bc5 (8...Qb4 9.Qa2+-) 9.Be6+- Ne7 10.Bf7 Kf8 11.Bc3 Qc7 (11...Qb6 12.d4 Bd6 13.Bc4+-) 12.Nf3 cb5 (12...Bf5 13.d4 Bd6 14.Nbd2+-) 13.Bh5 g6 (13...Ng6 14.ab5 a5 15.0-0+-) 14.Bf6 Rg8 (14...ba4 15.Qa2 Qc6 16.Bh8 gh5+-) 15.Ng5 Nf5 16.Qf7 1–0. GuestRJJW – GuestWQQQ, freechess.org, 2019.

6.Bc4 Qe7 7.a4 Qc5 8.Qb3 Qf5 9.Nf3 Ne7 10.d4 Qg4 (10...Nd5 11.0-0 c6 12.Nc3 Nc3 13.Bc3+/-) 11.0-0 Qf5 (11...Kf7 12.Rc1+/-) 12.Nbd2 Ng6 (12...c6 13.e4 Qg4 14.h3+-) 13.e4 (13.h3 Qh5+-) 13...Qg4 14.h3 Qf4 (14...Qh5 15.Be6 Nf4 16.Bd7 Nd7 17.Qe3+-) 15.g3 (15.Be6 Kd8+-) 15...Qh6 16.h4 (16.Be6 Kd8+-) 16...e5 17.Bf7 (17.de5 Ne5 18.Ne5 fe5 19.Bf7 Kd8+-) 17...Kd8 18.Bg6 (18.de5 Ne5 19.Ne5 fe5+-) 18...Qg6 19.de5 Bg4 20.ef6 gf6 21.Qd5 Nd7 (better 21...Kc8!?+-) 22.Qb7 Rc8 (22...Rb8 23.Qa6 (23.Qa7 Bc5 24.Bf6 Qf6-/+) 23...Bc5 24.Nd4+-) 23.Bd4 (23.Nd4 Ne5+-) 23...Bc5 (23...a5 24.ba6 Bd6 25.Qc6+-) 24.Bc5 Nc5 25.Rfc1 (better 25.Qa7 Ne6 26.Qe3+-) 25...Nb7-+ 26.Rc6 Bh3 (26...Nd6 27.e5 fe5 28.Ne5-+) 27.Kh2 (27.e5 Rf8 28.Re1 Qf5-+) 27...Bd7 28.Ra6 (28.Ne5 Qg7 29.Nd7 Qd7-+) 28...Qg4 (28...Nc5 29.Ra7 Ne4 30.Ne4 Qe4 31.Kg2-+) 29.Kg1 (29.Rf6 Nc5-+) 29...Qg7 (29...Nc5 30.Rf6 Re8 31.Rf4-+) 30.Rc1 (30.Ra7 Nd6-+) 30...f5 (30...Ra8 31.Nb3-+) 31.e5 (31.Ra7 Rb8 32.ef5 Rf8-+) 31...f4 (31...Ra8 32.e6 Be8 33.Kf1-+) 32.Kg2 (32.e6 Be8 33.Ra7 Rb8-+) 32...Rg8 (32...fg3 33.fg3 Rg8 34.Ng5-+) 33.e6 Be8 34.Ne4 (34.Ra7 Rb8 35.Ne4 Bh5 36.Rd1 Ke8-+) 34...Qb2 (34...Bh5 35.Nfg5-+) 35.Rd1 Ke7 36.Rd2 Qg7 (36...Qa1 37.Nd4 Bg6 38.Nc6 Ke8 39.Ng5 fg3 40.fg3-+) 37.Neg5 (37.Ra7 Rb8 38.Nc5 fg3 39.Rb7 gf2 40.Ng5 Rb7 41.Nb7-+) 37...h6 38.Ne4 fg3 39.fg3 (39.Ng3 Qc3 40.Re2-+) 39...Nc5 40.Nc5 Qg3 41.Kf1 (41.Kh1 Qf3 42.Kh2 Qg3 43.Kh1 Qg1) 41...Qf3 42.Rf2 (42.Ke1 Rg1) 42…Qd1 0-1. upep – vitebo, Rated Classical game, lichess.org, 2013.

6.Bc4 Ne7 7.Ne2 Nd5 8.Nbc3 c6 9.bc6 Nc6 10.Nd5 ed5.

6.Bc4 Nh6 7.Qh5 Nf7 8.Ne2 Bd6 9.Nf4 Bf4 10.ef4 a6.

5.a4 Bd6 6.Nc3 Nf8 (6...Ne7!?=+) 7.f4 Bd7 8.Bd3 Qe7 (8...Ng6 9.Nf3+=) 9.Nf3 Nh6 10.a5 Ng6 11.a6 b6 12.0-0 0-0-0? (better 12...0-0!?+-) 13.Nd4 Qe8 14.Qf3 (better 14.Qe2+-) 14...Kb8? (14...Nh4 15.Qe2 e5 16.fe5 fe5+-) 15.Bg6 hg6 (15...Qg6 16.Nd5! Qg4 17.Nf6 Qf3 18.Nd7 (18.Rf3? gf6 19.c4 Nf7-+) 18...Rd7 19.Rf3+-) 16.Nd5! Bb5 (16...ed5 17.Qd5 Combination) 17.Nf6! (17.Nf6 Ba6 18.Ne8+-) 1–0. Janek – tscjs, internet, 2018.

5.c4 dc4 6.Bc4 Nb6 7.Be2 Bd6 8.Nc3 Ne7 9.Nf3 Ned5 10.0-0 Nc3 11.dc3 e5 12.a4 Qe7 13.a5 Nd7 14.e4 Nc5 15.Nd2 Be6 16.Qc2 0-0 17.Bc4 Bc4 18.Nc4 Qd7 19.Nd6 cd6 (worse is 19...Qd6 20.Ba3+/–) 20.c4 f5 21.ef5 Rf5 22.Rad1 e4 23.Rd4 a6 24.Ba3 (24.Qd1 Qf7=) 24...ab5 25.cb5 Qb5 26.Bc5 dc5 27.Re4 Rf7 28.Rfe1 (28.Re5 Ra5 29.Rb1 Qa4=) 28...Qa5+= 29.h3 Raf8 30.R1e2 b6 31.Qc4 Qa8 32.Re7 (32.Qb3!?+=) 32...Qa1-/+ 33.Kh2 Qd4 34.Qe6 Qf4 35.Kg1 Qd4 36.Qb6 (better is 36.Kh2!?=) 36...Re7-/+ 37.Re7 Qf2 (37...Rf2?? 38.Qe6 Kh8 39.Rd7 Rg2 40.Kg2 Qb2 41.Kf3 Qf6 42.Qf6 gf6 43.Ke4+-) 38.Kh2 1–0. Hingst,Thomas (2095) – Vater,Siegbert (2020), remoteschach.de, 2009.

5.Qh5 g6 6.Qd1 Bc5 (6...e5 7.Nf3=) 7.c4 (7.Nf3 e5=) 7...Nb6 (7...dc4 8.Bc4 Nb6 9.Be2=) 8.cd5 Nd5 (8...ed5 9.Nf3=) 9.Nf3 Bd7 (9...e5 10.d4 Bb4 11.Nfd2 ed4 12.Bd4=) 10.a4 (10.e4 Nf4+=) 10...Qe7 (10...e5 11.e4 Nf4 12.d4 ed4 13.Bd4 Bb4 14.Nbd2=) 11.Be2 (11.e4 Nf4+=) 11...e5 12.Nc3 (12.0-0 Bd6=) 12...Nb4 (12...Nc3 13.Bc3 e4 14.Nd4+=) 13.0-0 (better 13.d4 ed4 14.ed4+=) 13...Qd6?? (better 13...e4!? 14.Ne1 0-0-0+=) 14.Ne4 (better 14.d4 Bf5 15.dc5 Qc5 16.Qb3+-) 14...Qd5 15.Nc5 Qc5 16.Rc1 (16.Ba3 a5+-) 16...Qd6 17.d4 ed4 18.Bd4 b6 (18...Be6 19.a5+-) 19.Qb3 (19.Bc4 Ne7+-) 19...0-0-0 (19...c5!? 20.bc6! Nc6+-) 20.Rfd1 (20.a5 Be6 21.Qa4 Kb8+-) 20...Be6 21.Qb2 Qe7 22.Bc4 (22.a5 Kb8+-) 22...Nd5 (22...Bd5 23.e4! Be4 24.Re1+-) 23.Ba2 (better 23.Qb3!? h6+-) 23...Bg4 24.Bd5 (24.Bc5 Qe4 25.Rd4 Bf3 26.Re4 Be4+-) 24...Rd5+- 25.Rc6 (25.Qe2 Rf5+-) 25...Bf3 26.gf3 Rg5 (26...Kb8 27.Rdc1 Rd6 28.R6c4+-) 27.Kh1 Qd8 (27...Rd5 28.Qc3 Rd6 29.a5+-) 28.Rg1 (28.Rdc1 Rd5 29.a5 Ne7 30.Bf6 Re8+-) 28...h6 (28...Rg1 29.Kg1 Kb7 30.a5+- (30.Bf6?! Nf6 31.Qf6 Rf8 32.Qd8 Rd8+-)) 29.Rgc1 Rh7 30.Bf6 Nf6 31.Qf6 Qf6 (31...Re7 32.e4 Rd7 33.Qd8 Kd8 34.h4+-) 32.Rf6 Kb7 (32...Rg7 33.e4+-) 33.f4 Rf5 (33...Rd5 34.Rg6 a6 35.Rb1+-) 34.Rg6 Rd7 (34...a6 35.Rb1+-) 35.Kg2 h5 (35...a6 36.ba6 Ka6 37.Rh6+-) 36.Kf3 (36.Rg5 Rg5 37.fg5 a6+-) 36...Rdd5 (36...Rdf7 37.h4+-) 37.Rh6 (37.Ke4 Rc5 38.Rc6 Rc1 39.Rc1 Rf8+-) 37...a6 (37...Rc5 38.Rc6 Rc6 39.Rc6+-) 38.Rh7 ab5 (38...Rc5 39.ba6 Ka6 40.Rc7 Rc1 41.Rc1 Rd5+-) 39.Rcc7 Kb8 40.ab5 (better 40.e4 ba4 41.ef5 Rf5 42.Rb7 Kc8 43.Rb6+-) 40...Rb5 41.Rc6 (41.Rcg7 Rfc5+-) 41...Rfc5 (41...Rf8 42.Rg7+-) 42.Re6 Rc7 43.Rh8 (43.Rc7 Kc7 44.Re5 Rb1+-) 43...Kb7 44.Rf8 (44.Rg6!? Rd5+-) 44...Rbc5 (44...Ka6 45.Re5 Re5 46.fe5+-) 45.f5 (45.Rh6 b5+-) 45...b5 46.Re4 (46.Rh6 b4 47.Rh5 b3+-) 46...Rc4 (46...Kc6 47.Rh4+-) 47.f6 Re4 48.Ke4 b4 49.Rg8 (better 49.Kd5 Kb6 50.f7 Rb7+-) 49...b3 50.Rg1 b2 (50...Ka6+-) 51.Rb1 Rc4 (51...Kc8 52.Rb2 h4 53.Kf5+-) 52.Kf5 Rc2 53.Ke6 (53.f4 Ka6 54.e4 Rd2+-) 53...Rf2 (53...Rc6 54.Kf7 Rc2+-) 54.f7 Kb6 (54...Kc7 55.e4+-) 55.Rb2!! Rb2 56.f8Q Rh2 (56...Rb5+-) 57.Qd6 Kb5 58.e4 (58.Qh2 Kb6 59.Qd6 Ka5 60.Kd5 Ka4 61.Kc4 Ka5 62.Qc6 h4 63.Qb5) 58...Re2 (58...Rh3+-) 59.Qd5 Kb4 60.e5 (60.Qd4 Ka5 61.Qc5 Ka4 62.Qc4 Ka3 63.Qe2 Kb3 64.Qh5 Kb4 65.e5 Kc5 66.Kd7 Kb4 67.e6 Kb3 68.Qe2 Ka4 69.e7 Kb3 70.e8Q Kc3 71.Qb8 Kd4 72.Qbe5) 60...h4 (60...Kc3+-) 61.Qd4 Kb3 62.Qh4 (better 62.Qd3 Kb4 63.Qe2 Kc3+-) 62...Kb2 (62...Kc3 63.Kf6+-) 63.Qf4 (63.Kf7 Kc2+-) 63...Kc3 (63...Rc2 64.Kd7 Re2 65.e6+-) 64.Kf7 (64.Qf3 Kd2+-) 64...Kd3 65.e6 Kc2 66.e7 Kb2 (66...Re1 67.Qa4 Kc1 68.Qa1 Kd2 69.Qb2 Kd3 70.Qb3 Kd2 71.Qb4 Kd1 72.Qd6 Kc2 73.e8Q Re8 74.Ke8+-) 67.e8Q (67.Qc4 Re7 68.Ke7 Kb1+-) 67...Re8 68.Ke8 Kc3 69.Kd7 Kd3 70.Kd6 Ke2 71.Kd5 Kd1 (71...Kd3 72.Qf3 Kd2 73.Kc4 Ke1 74.Qg2 Kd1 75.Kd3 Ke1 76.Qe2) 72.Qf3 (72.Qf2 Kc1 73.Kd4 Kd1 74.Kd3 Kc1 75.Qc2) 72...Kc2 73.Kd4 (73.Kc4 Kd2 74.Qf2 Kd1 75.Kd3 Kc1 76.Qc2) 73...Kb2 74.Qd3 Ka2 (74...Kc1 75.Qe2 Kb1 76.Kc3 Kc1 77.Qc2) 75.Kc3 Ka3 (75...Ka1 76.Qb5 Ka2 77.Qb2) 76.Qa6 1–0. DEFFM – GuestXPTT, freechess.org, 2016.

5.c4 d4 6.ed4 ed4 7.Nf3 c5 8.d3 b6 9.Be2 Bd6 10.0-0 (10.Nd4 a6 11.Bf3 Ra7+-) 10...Ne7 (10...a6 11.Nfd2=) 11.Nfd2 (better 11.Nd4 a6 12.Bh5 Kf8 13.Nb3+-) 11...0-0? (better 11...a6=) 12.Bf3+- Be5?? (better 12...Nbc6 13.bc6 Qc7+-) 13.Ba8 Nd7 14.Bf3 Nf5 (14...Qc7 15.g3+-) 15.g3 Nh6 (15...Ne7 16.Bg2+-) 16.Bd5 Kh8 17.Nf3 (17.Re1 Nf5+-) 17...a6 (17...Nf5 18.Re1+-) 18.Ne5 (18.ba6 Ba6 19.Bc1 Nf5+-) 18...Ne5 19.a4 (19.ba6 Ba6 20.Be4 Re8+-) 19...ab5 (19...Bh3 20.Re1 Re8 21.Na3+- (21.ba6 Qd5 22.cd5 Nf3 23.Kh1 Ne1+-)) 20.ab5 Ng6 (20...Bf5 21.Ra3+-) 21.f4 (21.Re1!? Nf5+-) 21...Bg4 22.Bf3 Bf3 23.Qf3 Re8 24.Nd2 (24.Ra6 Ne7+-) 24...f5 (24...Ne7 25.Ra7+-) 25.Ra6 Ng4 (25...Ng8 26.Qd5 Qd5 27.cd5+-) 26.Bc1 (26.Qb7 Qf6 27.h3 Ne3+-) 26...Ne3 (26...Nf8 27.Qd5 Qf6 28.Nf3+-) 27.Re1 Nc2 (27...Ne7+-) 28.Re8 Qe8 29.Ra8 (29.Ra8 Qf8 30.Rf8 Nf8 31.Qa8+-) 1–0. BeepBeepImAJeep (2570) – holst, lichess.org, 2015.

5.c4 Be6 6.cd5 Qd5 7.Nc3 Qd7 8.Qa4 (8.Nf3 Bd6+-) 8...a6 (8...Ne7!?+-) 9.Nf3 c6 10.d4 cb5 11.Bb5! Qb5 (11...ab5 12.Qa8 Pinning (12.Qa8 Deflection)) 1–0. DEFFM – GuestQJGS, freechess.org, 2019.

5.c4 Be6 6.cd5 Bd5 7.Nc3 Bf7 8.Nf3 Bb4 9.Qa4 Bc3 10.dc3 b6? (better 10...Ne7+-) 11.Rd1 Qe7? (11...Nd7 12.Ba3 Ne7+-) 12.Ba3 Qe6 13.Qe4 c6 14.bc6 Qc6 (14...Ne7 15.Be7 Qe7+-) 15.Bb5!! (15.Bb5 Qb5 16.Qa8 Ba2 17.Qb8 Kf7 18.Qb7 Ne7 19.Qe7 Kg6 20.Nh4 Kh5 21.Qg7 Qe2 22.Ke2 Bb3 23.Nf5 Bc4 24.Ke1 Be2 25.Ke2 Rd8 26.g4) 1–0. DEFFM – GuestPTWJ, freechess.org, 2019.

5.d4 e4 6.c4 Bb4 7.Bc3 Bc3 8.Nc3 c6 (8...Ne7 9.cd5 f5 10.Qh5 g6 11.Qh6+/–) 9.bc6 bc6 10.cd5 cd5 11.Qh5 g6 12.Qd5 Qd5 13.Nd5 Kd7 (better is 13...Kd8+-) 14.Rc1 Kd6 (14...Na6 15.Bb5 Kd8+-) 15.Rc8 Kd5 16.Bc4 Kd6 17.Bg8 (worse is 17.Rg8 Rg8 18.Bg8 Nc6+-) 17...Rg8 (17...a6 18.Ne2+-) 18.Rg8 Na6 (18...a6+-) 19.Ra8 (19.Ra8 Nc7 20.Ra7+-) 1–0. Trkn – guest7453, ICC, 2004.

5.a4 Ng6 6.c4 Bd6 7.Nf3 c6 8.Be2 0-0 9.0-0 e5 10.d4 e4 11.Nfd2 f5 12.f3 ef3 13.Bf3 Be6 (13...Qg5 14.Qb3 Re8 15.bc6 bc6 16.cd5 Re3 17.Bc3=) 14.Nc3 (14.cd5 cd5 15.Ba3 a6+=) 14...dc4= 15.bc6 Nc6? (better 15...bc6!? 16.Qe2 Qc7=) 16.d5+/- Qh4 (16...Na5 17.de6 Qb6 18.Nb5 Qe3 19.Kh1+-) 17.g3 (17.h3!?+-) 17...Bg3+/- 18.hg3 Qg3 19.Bg2 Nh4 20.Qe2 (20.Rf2 Ne5 21.de6 Ng4+/-) 20...Ne5 (20...Ng2!? 21.Rf3 Qg6 22.Qg2 Qg2 23.Kg2 Rad8=) 21.Qf2 (better 21.de6!? Ng4 22.Rf3 Nf3 23.Qf3 Qh2 24.Kf1+-) 21...Qf2= 22.Rf2 (worse 22.Kf2 Ng4 23.Kg1 Ng2 24.Nc4 N2e3 25.Ne3 Ne3 26.de6 Rae8-/+) 22...Bf7 23.Nf1 (better 23.Bf1!? Rac8 24.Be2+=) 23...Nd3=+ 24.Rd2 Nb2 (24...Ng2 25.Rg2 Rfe8-/+ (worse 25...Nb2 26.Rb2 b6 27.Rd1+=)) 25.Rb2+= b6 26.Rd1 Rad8 (26...Ng2 27.Kg2 Rfd8+=) 27.Rbd2 (27.Rb4!?+/-) 27...Rfe8 (27...Bh5 28.Rc1 Bf3 29.Bh3=) 28.Kf2 Ng2 29.Kg2 Re5 30.Kf3 (30.Rd4 Bh5 31.R1d2 Bf7+=) 30...g5 31.Ng3 (31.Kf2 Bh5 32.Rc1 Bf7=) 31...h5 Black intends g4 32.Kf2 (32.e4 fe4 33.Ke3 Kg7=) 32...h4-/+ 33.Nge2 Bh5 (33...g4 34.Rd4 Rde8 35.e4 fe4 36.Ke3=) 34.Rg1 g4 35.Nf4 Bf7 (35...g3 36.Kg2 Re3 37.Nh5 Rc3=+) 36.Rd4= Kg7 37.Ng2 (37.Rc4 Re7+=) 37...h3 (37...Rh8!?=+) 38.Nf4= Kf6 (better 38...Rde8 39.e4 Rh8+=) 39.Kg3?? (better 39.Rc4 Rh8 40.e4+=) 39...Re3-+ 40.Kh4 (40.Kh2 Rc3 41.Re1-+) 40...Rc3 (40...Rh8 41.Nh5 Rh5) 41.Nh5-+ Bh5 42.Re1 Bf7 43.Re6 (43.Rd3 Rd3 44.Re6 Be6 45.de6 Rh8) 43...Be6 44.Rg4 (44.Rd3 Rd3 45.de6 Rh8) 44…Rh8 0-1. BeepBeepImAJeep (2580) - Clovis99 (2425), lichess.org, 2017.

5.c4 dc4 6.Bc4 c6 7.a4 (7.Qh5 g6 8.Qf3 Bg7+=) 7...cb5 8.ab5 b6? (8...Nd5!?=) 9.Nf3 (better 9.Qh5 g6 10.Qf3+-) 9...Nd5+= 10.0-0 Bb7 11.d4 Bd6 12.Qb3 0-0 (12...Qe7 13.Rc1+/-) 13.Nc3 (13.e4 Nc7+/-) 13...Nc3 (13...Kh8 14.Nd5 Bd5 15.Bd5 ed5 16.Rfc1+/-) 14.Be6 (14.Qc3?! Qe7+=) 14...Kh8 15.Bc3 Nd7 16.Bd5 (16.Rfd1 a5+-) 16...Bd5? (better 16...Nc5 17.dc5 Bd5+=) 17.Qd5+- Rc8? (17...Qe7 18.e4+-) 18.Bb2 (18.Qd6 Rc3 19.Ra7 Rf7+-) 18...Qe7 (18...Nb8 19.e4 Qe7 20.Qf5+-) 19.Ra7 Rc7 20.Rc7 Bc7 21.Rc1 Bd6 22.Rc6 Ra8 (22...Bb4+-) 23.Rd6 Ra2 (23...Ra7 24.e4 Nf8+-) 24.Rd7 Rb2 25.Rd8 (25.Re7?? Rb1 26.Ne1 Re1) 25...Qd8 26.Qd8 1-0. BeepBeepImAJeep (2585) - paologag02 (1940), lichess.org, 2016.

5.a4 c6 6.c4 dc4 7.Bc4+= cb5 (7...a6 8.Qb3+=) 8.ab5 Bb4 (8...Bd6 9.Nf3+=) 9.Nf3+- Nd7 (9...Qe7 10.0-0+-) 10.Be6 Nc5 (10...Ne5 11.Bg8 Nd3 12.Ke2 Nb2 13.Qb3 Qd3 14.Qd3 Nd3 15.Bd5+-) 11.Bc4 Nd3 12.Bd3 Qd3 13.Nc3 (13.b6 a5+-) 13...Bc3 14.Bc3 Qb5 15.Qc2 Qc5 (15...Bf5 16.e4 Bg4 17.Nd4+-) 16.Nd4 (16.0-0 Qd6+-) 16...Ne7 17.Ra5 Qd6 18.Qa2 (18.0-0 Nc6 19.Nc6 Qc6+-) 18...Nc6 (18...a6 19.Nb5 Qc6 20.0-0+=) 19.Nb5 Qd7 20.Bf6 (better 20.Ra4!? Ne5 21.Be5 fe5 22.Qc4+-) 20...Na5= 21.Bh8 Qb5 22.Qg8 Kd7 (22...Ke7 23.Qh7 Kd6 24.Qg6 Be6 25.Qg3 Ke7 26.Qh4 Kd7 27.Qd4 Kc8 28.Qb2=) 23.Qh7 Kd6 24.Qg6 Be6 25.Qg3 Kc6 26.Qg6 Qf5 (26...Qb3 27.Bc3 Rg8 28.Qf6=+) 27.Qf5+= Bf5 28.Bc3 Nc4 (better 28...Nb3 29.f3 Bd3=) 29.0-0 (29.Ke2+=) 29...Nd2?? (better 29...a5=+) 30.Bd2+- Rd8 (30...a5 31.f3+-) 31.Rc1+- Kb5 32.Be1 (32.Bc3 a5+-) 32...a5 33.h4 (33.f3 a4+-) 33...a4 34.f3 a3 35.Ra1 (35.g4 Bd3+-) 35...Rd3 (35...Ka4 36.h5+-) 36.e4 (36.Kf2 Be6+-) 36...Be6 37.Rb1 (better 37.Kf2+-) 37...Ka4?? (better 37...Bb3+-) 38.Rb4+- Ka5 39.Rd4 Kb5 40.Rd3 a2 (40...Ka4 41.Rd4 Kb5 42.Bc3+-) 41.Ra3 Kc4 42.f4 (better 42.Ra2 b5+-) 42...Kd4 43.f5 Bc4 44.f6 (44.h5 Ke4 45.h6 Bg8+-) 44...b5 (44...Ke4 45.g4 Bg8 46.h5+-) 45.g4 b4 (45...Ke4 46.h5 a1N 47.Ra1+-) 46.Bb4 Ke4 (46...Ke4 47.h5 Ke5+-). GuestHMFH – GuestBJBY, freechess.org, 2016.

5.f4 Bg7 6.Nf3 Nh6 (6...Ne7 7.Be2=) 7.c4 (7.Be2 a6+=) 7...Nf7 (7...0-0 8.cd5 ed5 9.Be2=) 8.cd5 Qd5 (8...ed5 9.Be2+=) 9.Nc3+= Qd7 (9...Qd8 10.d4+=) 10.Bc4 (10.Ne4 Qe7+=) 10...0-0 (10...Nd6 11.Be2=) 11.0-0+= c6 (11...Nd6 12.Be2+=) 12.a4 c5 (12...Nd6 13.Be2+=) 13.Ne4+- b6 (better 13...Qe7!?+-) 14.Bf6+- Qe7?? (better 14...Bb7 15.Bg7 Kg7+-) 15.Be7 (15.Be7 Re8 16.Nf6 Bf6 17.Bf6+-) 1–0. GuestJYKF – GuestSRDX, freechess.org, 2020.

5.Bc4 Bb4 6.Qb3 Qe7 7.a3 Bd6 8.Nc3 Nc6 9.Nf3 Na5 (9...Bd7!?+=) 10.Qb5 Nc6 11.Ne4 a6 12.Nd6 cd6 13.Qb3 Na5 (13...b5 14.Be2+=) 14.Qa4= Nc6 15.Qc2 (15.Qb3 b5 16.Be2 Bb7+=) 15...Bd7+= 16.0-0 d5 17.Bd3 f5 18.Qb3 b5 19.Rfc1 Nf6 20.Ne5 Ne5 21.Be5 0-0 22.Qb4 Qb4 23.ab4 Rfc8 (23...Rac8 24.Be2+=) 24.f3 (24.Rc8 Rc8 25.Ra6 Ne4=) 24...Kf7 (24...Rc1!? 25.Rc1 Kf7+=) 25.Rc8+= Rc8 26.Ra6 Rc1 27.Kf2 Rd1 28.Ra2 Ne8? (better is 28...Ke7+=) 29.Be2+- Rb1 30.Ra7 Ke7? (30...Nf6 31.Bb5 Ke8 32.Bf6 Bb5 33.Rg7 Rb4 34.Rh7 Kf8+-) 31.Bb5 Rb4 (31...Nf6 32.Bf6 Kf6 33.Bd7 Rb4+-) 32.Bd7 Kf8 (32...Rb6 33.Ba4 Kf8+-) 33.Be6 Rb6 34.Rf7 (34.Rf7 Kg8 35.Bd5+-) 1–0. Janek – Kevin, internet free game, 2017.

5.Bc4 Bb4 6.Qb3 Ne7?? 7.Qb4+- Nbc6 8.Qb3 Na5 9.Qb5 Nac6 (9...c6 10.Qh5 g6+-) 10.Qb3 (10.Qh5 Ng6+-) 10...b6?? (10...Na5 11.Qa4 c6+-) 11.Be6 (11.Bc3 Nd5+-) 11...Be6 12.Qe6 a5 (12...Nb4 13.Qb3 Qd5 14.Kf1+- (14.Qb4?! Qg2 15.Nf3 Qh1 16.Ke2 Qg2+-)) 13.Nf3 a4 (13...Nb4 14.0-0+-) 14.Nd4 (14.d4!? Qd7 15.Qd7 Kd7+-) 14...Nd4 15.Bd4 (worse 15.ed4 Qd7 16.Qe2 0-0+-) 15...Ra5 (15...Qd7 16.Qd7 Kd7 17.e4+-) 16.0-0 Rd5 17.Rc1 Rd6 (17...Qd7 18.Qd7 Kd7 19.Nc3+-) 18.Qc4 c6 (18...c5 19.Qa4 Qd7 20.Qa8 Qd8 21.Qd8 Kd8 22.Bc3+-) 19.Nc3 (19.Qa4 Rd5+-) 19...b5 (19...c5 20.Ne4 cd4 21.Nd6 Qd6 22.Qa4 Kf7 23.Rab1+-) 20.Nb5! cb5 21.Qb5 Kf7 (21...Qd7 22.Qb8 Qd8 23.Qa7+-) 22.Qa4 Re8 23.Rc7 (better 23.Qb3 Re6 24.a4+-) 23...Qc7-+ 24.Bc3 (24.Qb3 Kf8-+) 24...Nd5 25.Bd4 Rc6 26.Qd1 Rc8 (26...Kg8 27.a4-+) 27.Qh5 Kg8?? (better 27...Ke6 28.g3 Qb7-+) 28.g3?? (better 28.Qd5 Kh8 29.Bc3+-) 28...Nb4 29.Bc3 Nd3 (29...Nd3 30.Qd5 Qf7 31.Qd3 Qe6+-). GuestHTXH – GuestNVTJ, freechess.org, 2017.

5.a3 a5 6.b5 Nd7+=.

5.b5 e5 6.c4 c6 (6...Be6 7.cd5 Bd5 8.Qc2+=) 7.cd5 (7.Nc3 Be6 8.cd5 cd5+/–) 7...cd5 8.Be2 (8.Nc3 Be6+=) 8...Be6+= 9.Nf3 Nd7 10.0-0 Bd6 11.d4 e4 12.Ne1 (12.Nfd2 Ne7=) 12...f5 (12...Ne7 13.Nc3=) 13.g3 Ngf6 14.Ng2 g5 15.f3 (15.h4!? h6 16.Nc3=) 15...ef3-/+ 16.Bf3 h5 17.Nd2 (17.Ba3 Nb6-/+) 17...Qb8 (17...h4!? 18.gh4 Qc7 19.hg5 Bh2 20.Kf2 Ne4 21.Ke2 Ng3 22.Kf2 Nf1 23.Kf1 Bd6-/+) 18.Qb3+= h4 19.e4 fe4 20.Ne4 Ne4 (20...hg3!? 21.Nd6 Qd6 22.hg3 Qg3+=) 21.Be4+= hg3 22.Bd5 Bh3?? (22...Nc5 23.Qf3 Qc7+- (23...gh2? 24.Kh1 Bd5 25.Qd5+-)) 23.Qe3+- Kd8 24.Qg5 (24.hg3!? Re8 25.Qg5 Be7+-) 24...Kc7 (24...Be7 25.Qg3 Qg3 26.hg3+-) 25.Rfc1 (better is 25.hg3 a6 26.ba6 Ra6 27.Rac1 Kb6 28.Rf3+-) 25...Kb6+/– 26.a4 (26.hg3 Bg3 27.Ba3 Bh2 28.Kf2 Bd6+-) 26...a5 (26...gh2 27.Kh1 a5 28.Ba3 Ba3 29.Ra3+=) 27.ba6 Ra6 (27...Ra6 28.hg3; 27...Ka6; 27...ba6 28.a5) 28.Rc3 (28.hg3 Bg3 29.Rc3 Bh2 30.Kf1 Ka7+=) 28...Ra5 (28...gh2!? 29.Kh1 Ka7=) 29.Rb3+= Ka7 30.Bc3 gh2 31.Kh1 Rg8 (better is 31...Be7 32.Rb5 Bg5 33.Ra5 Kb6 34.Rb1 Kc7 35.Rb7 Qb7 36.Bb7 Kb7 37.Rg5 Nb6+=) 32.Qh4?? (better is 32.Qg8 Qg8 33.Bg8+/–) 32...Bg2-+ (32...Rd5?! 33.Qh3 Nf6 34.Qf3-/+) 33.Bg2 Rg2! 34.Ba5 (34.Kg2 Qg8) 34...Qg8 35.Rb7 Ka6 36.Rbb1 Qd5 (36...Qd5 37.Rb6 Nb6 38.Qe4 Qe4 39.Rf1 Rf2; 36...Ka5?? 37.Qe1 Ka6 38.Qf1 Ka7 39.Qg2 Qg2 40.Kg2+-) 0–1. Bouvier,Clement (1880) – Levesque,Thomas (2050), 9e Tournoi d'Automne – Tournoi A, 2010.

5.b5 Kf7 6.c4 a6 7.a4 Nd7 8.cd5 Nc5 9.de6 Be6 10.Bc2 Nd3 (10...ab5 11.ab5 Ra1 12.Ba1 Nd3 13.Bd3 Qd3 14.Nc3+=) 11.Bd3+= Qd3 12.Ne2 Bd6 13.Nbc3 Nh6 (13...Ne7 14.Nc1 Qf5 15.e4+=) 14.0-0 (14.Nd4 Bc4+-) 14...Bc4 15.f4 (15.Re1 Rhd8+-) 15...Rhd8 16.Ng3 Be7 17.Rf2 ab5 18.Nb5 Bb3 19.Qf3 (19.Qc1!?=) 19...Ba4=+ 20.Nc3 Bc6 21.Qd1 b5 22.Ra8 Ba8 23.Qb3 (23.f5 A) worse 23...gf5 24.Qh5 Kg7 25.Qh4+= (25.Nf5 Nf5 26.Rf5 Qd2 27.Qg4 Kh8-+); B) 23...Nf5?! 24.Nf5 gf5 25.Qb3 Kf8 26.Qb5=; C) 23...b4 24.Na4 Qe3-/+) 23...Bd5-/+ 24.Qb5 Qb5 25.Nb5 Ng4 26.Re2 (26.Ba3 Ba3 27.Na3 Nf2 28.Kf2 c5-/+) 26...Bc4-+ 27.Nd4 Be2 28.Nge2 Rb8 29.Bc1 Rb1 30.Nc2 f5 31.h3 Nf6 32.Kh2 (32.d3 Nd7 33.Kf1 Nc5-+) 32…Ne4 0–1. GuestRXMP – GuestYLNH, freechess.org, 2018.

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

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

4.a3 g6 5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 g6).

4.Nf3 Nc6 5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Nc6 5.Nf3).

4.Nf3 Bd6 5.b5 b6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bd6).

5.b5 a4 (--> 1.b4 a5 2.b5 d5 3.Bb2 a4 4.e3 e6 5.a3 Nf6).

5.b5 c6 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 a5 6.b5).

5.b5 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 Bd6).

5.b5 Bd6 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 Bd6 6.e3).

5.Nf3 c5 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.Nf3).

5.Nf3 c5 6.bc5 Bc5 7.Be2 Nc6 8.0-0 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0-0 8.0-0 a6).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 a6).

5.c4 Bb7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.c4).

5.c4 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 b6).

5.Nf3 c5 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6 6.Nf3).

(---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5).

5.b5 Bd6=+ 6.a4 0-0 7.c4 b6 8.Nf3 Bb7 9.d4 Nbd7 10.Bd3 (10.Nc3 Rc8=+) 10...Rc8 (10...cd4 11.ed4 Bb4 12.Kf1 dc4 13.Bc4-/+) 11.Nbd2 Re8 (11...cd4 12.ed4 dc4 13.Nc4 Bb4 14.Ncd2-/+) 12.Rc1 cd4 13.Bd4? (better 13.ed4 e5 14.Be2-/+) 13...e5-+ 14.0-0 ed4 15.Nd4 g6 16.N2b3 (16.cd5 Rc1 17.Qc1 Nc5-+) 16...Nc5 17.Re1 (17.cd5 Nd5 18.Nc5 bc5-+) 17...dc4 (better 17...Nd3 18.Qd3 dc4 19.Rc4 Bh2 20.Kf1-+) 18.Bc4 Be5 19.Nc5 bc5 20.Nb3 Qd1 (20...Qc7 21.f4 Bb2 22.Rc2-+) 21.Red1 Re7 22.f3 Rd7 23.a5 Rd1 24.Rd1 Kf8 25.e4 Ke7 26.g3 g5 27.Kf2 (27.Kf1 g4 28.f4 Bb2-+) 27...g4 28.Bd5 (28.a6 Ba8-+) 28...Nd5 29.ed5 gf3 30.Kf3 c4 31.Na1 (31.Ke4 cb3 32.Ke5 Rc5-+) 31...Ba1 (better 31...Rc5 32.Rb1-+) 32.Ra1 Bd5 33.Ke3 Kd6 34.Kd4 c3 35.Kd3 c2 36.Kd2 Bc4 (better 36...Be4 37.b6 ab6 38.ab6-+) 37.Kc2 Bb5 38.Kd2 Kc7 39.Rc1 Kb7 40.Rc8 Kc8 41.Kc3 Kc7 (41...Kb7 42.Kb3-+) 42.h3 (42.Kb4 Bc6-+) 42...Kc6 43.h4 Kc5 44.g4 Bd7 45.g5 Kb5 46.a6 Ka6 47.Kb4 Kb6 48.h5 a5 49.Kc4 a4 50.Kb4 Kc7 51.Ka3 Kd6 52.Kb4 Ke5 53.h6 (53.Kc4 Kf4 54.h6 Kg5-+) 53…Kf5 (53...Kf5 54.Kc3 Kg5-+) 0-1. Van Lit,Mats - Schippers,Philippe, NED-ch U12 Rijswijk, 2007.

5.b5 Bd6 6.c4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4).

5.b5 Bd6 6.Nf3 Nbd7 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0-0 7.c4 Nbd7).

5.b5 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c5 6.b5).

5.b5 Be7 6.f4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.f4 0-0 6.Nf3 c5 7.b5).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5).

6.Nc3 Nc6 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Nc3).

6.c4 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.c4).

6.d4 Bd6 7.Bd3 0-0 8.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.d4 Bd6 8.Bd3).

6.d4 Bd6 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 c5 5.bc5 Bc5 6.d4 Bd6 7.e3).

6.d4 Bd6 7.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.d4 Bd6).

6.d4 Bd6 7.Nf3 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6).

6.d4 Be7 7.c4 0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c5 4.bc5 Bc5 5.d4 Be7 6.e3 0-0 7.c4 d5).

6.d4 Be7 7.c4 0-0 8.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 c5 5.bc5 Bc5 6.d4 Be7 7.e3 0-0 8.c4).

6.Nf3 Nc6 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.c4 Nc6).

6.Nf3 Nc6 7.Be2 h6 8.0-0 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0-0 8.0-0 h6).

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

5.c4 Be7 6.Nf3 Nbd7 7.Nc3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.Nc3 Nbd7).

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

5.c4 0-0 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 0-0 6.c4).

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

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

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

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

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

5.c4 Be7 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 Nbd7).

5.Nf3 c5 6.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nbd7).

5.Nf3 c5 6.bc5 Bc5 7.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 0-0 7.c4 Nbd7).

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

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

5.c4 0-0 6.Nf3 dc4 7.Bc4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3).

5.c4 dc4 6.Bc4 0-0 7.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3).

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

5.c4 c6 6.c5 0-0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.c5).

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

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

5.d4 0-0 6.c4 c6 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4).

5.d4 0-0 6.Nf3 Nbd7 7.c4 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 Nbd7).

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

5.Nf3 0-0 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Be7 5.c4 dc4 6.Bc4 0-0 7.Nf3).

5.Nf3 0-0 6.c4 dc4 7.Bc4 c6 8.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 dc4 8.Bc4).

5.Nf3 0-0 6.c4 Nbd7 7.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.d4 Nbd7 7.c4).

5.Nf3 0-0 6.c4 Nbd7 7.d4 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.d4 Nbd7).

5.Nf3 0-0 6.Be2 b6 7.0-0 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0-0 7.0-0 d5).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 Be7).

5.a4 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.a4 e6 4.b5 c5 5.e3 a5).

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

5.Nf3 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6 4.Bb2 d5 5.e3).

5.a4 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 a6 6.a4).

5.a4 c6 6.Nf3 Be7 7.c4 Nbd7 8.Nc3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 a6 8.Nc3 Nbd7).

5.a4 Bd6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Bd6).

5.a4 Bd6 6.c4 ab5 7.ab5 Ra1 8.Ba1 Nbd7 9.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7 8.Nf3 Bd6 9.c4).

5.a4 Bd6 6.Nf3 0-0 7.c4 ab5 8.ab5 Ra1 9.Ba1 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7 8.Nf3 Bd6 9.c4 0-0).

5.a4 Bd6 6.Nf3 0-0 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.Be2 a6 7.a4).

5.a4 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Be7).

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

5.a4 Be7 6.Nf3 c5 7.c4 0-0 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 a6 8.a4).

5.c4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.c4).

5.c4 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a6).

5.Nf3 ab5 6.Bb5 c6 7.Be2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.e3 ab5 5.Bb5 c6 6.Be2 d5 7.Nf3).

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

7.Ba1 c5 8.c4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4).

7.Ba1 c6 8.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3).

7.Ba1 Bd6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6).

7.Ba1 Bd6 8.Nf3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.Nf3 Bd6).

7.Ba1 Bd7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd7).

7.Ba1 Nbd7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7).

7.Ba1 Nbd7 8.Nf3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Be7 8.Nf3 Nbd7).

7.Ba1 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Be7).

7.Ba1 Be7 8.c4 c6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 Be7).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6).

5.a4 Be7 6.Nf3 0-0 7.c4 Bb7 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Be7 7.Be2 0-0 8.a4).

5.c4 Bb7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

5.c4 Bb7 6.Nf3 Be7 7.Be2 0-0 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0-0 7.Be2 d5).

5.c4 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 b6).

5.Nf3 Bb7 6.c4 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5).

5.Nf3 Bb7 6.c4 c5 7.Be2 Bd6 8.0-0 0-0 9.a4 Nbd7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.Nf3 Bb7 6.c4 c5 7.Be2 Be7 8.0-0 0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5).

5.Nf3 Bb7 6.Be2 Be7 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 d5).

5.Nf3 Bd6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 b6).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Nbd7 5.Nf3 b6).

5.Nf3 Nbd7 6.c4 Bb7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4 Nbd7).

5.Nf3 Be7 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.c4 b6).

5.Nf3 Be7 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.Be2 b6).

5.Nf3 Be7 6.Be2 0-0 7.0-0 Bb7 8.a4 c5 9.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 b6).

6.c4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5).

6.c4 Be7 7.Be2 0-0 8.0-0 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5).

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

5.a4 (--> 1.b4 d5 2.Bb2 Nf6 3.a4 e6 4.b5 c5 5.e3).

5.a4 a6 6.c4 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 c5 8.c4).

5.a4 Be7 6.c4 0-0 7.Nf3 Nbd7 8.Be2 b6 9.0-0 Bb7 10.d3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d3).

5.a4 Be7 6.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.a4).

5.c4 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 c5 8.c4).

5.c4 a6 6.a4 Be7 7.Nf3 0-0 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 a6 8.a4).

5.c4 Bd6 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4).

5.c4 Bd6 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5).

5.c4 Bd6 6.Nf3 0-0 7.Be2 Nbd7 8.0-0 b6 9.a4 Bb7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.c4 Bd6 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

5.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7).

5.c4 Nbd7 6.a4 b6 7.Nf3 Bb7 8.Be2 Bd6 9.0-0 0-0 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.c4 Nbd7 6.Nf3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

5.c4 Nbd7 6.Nf3 Bd6 7.a4 b6 8.Be2 Bb7 9.0-0 0-0 10.d4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 10.d4).

5.c4 Nbd7 6.Nf3 Be7 7.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 Nbd7).

5.c4 Be7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4).

5.c4 Be7 6.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0).

5.c4 Be7 6.Nf3 0-0 7.a4 a6 8.Be2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 a6 8.a4).

5.c4 Be7 6.Nf3 0-0 7.a4 b6 8.Be2 Bb7 9.0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4).

5.c4 Be7 6.Nf3 0-0 7.Be2 b6 8.0-0 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5).

5.c4 Be7 6.Nf3 0-0 7.Be2 Nbd7 8.0-0 b6 9.d3 Bb7 10.Nbd2 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0-0 7.0-0 d5 8.d3 c5 9.Nbd2 Nbd7 10.c4).

5.c4 Be7 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 Be7).

5.Be2 Bd6 6.c4 0-0 7.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

5.Nf3 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 c5 8.Nf3).

5.Nf3 b6 6.c4 Bb7 7.Be2 Be7 8.0-0 0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5).

5.Nf3 b6 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 b6).

5.Nf3 b6 6.Be2 Bb7 7.0-0 Nbd7 8.a4 Bd6 9.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.f4 Nbd7 6.Nf3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.f4 Be7 6.Nf3 Nbd7).

6.Nf3 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5).

6.Nf3 Bb7 7.a4 Nbd7 8.Be2 Be7 9.0-0 0-0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7).

6.Nf3 Bb7 7.a4 Nbd7 8.Be2 Be7 9.0-0 0-0 10.d4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d4).

6.Nf3 Bb7 7.Be2 Be7 8.0-0 0-0 9.d4 Nbd7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.d4 Nbd7).

6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 b6).

6.Nf3 Nbd7 7.Be2 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2 Nbd7).

6.Nf3 Nbd7 7.Be2 Be7 8.0-0 0-0 9.d4 Bb7 10.Nbd2 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.d4 Nbd7 10.Nbd2).

6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5).

6.c4 0-0 7.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

6.c4 0-0 7.Be2 Nbd7 8.0-0 dc4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 dc4).

6.c4 b6 7.Be2 Bb7 8.0-0 0-0 9.a4 Nbd7 10.a5 ba5 11.cd5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 10.a5 ba5 11.cd5).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

7.a4 b6 8.Be2 0-0 9.0-0 Bb7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

7.d3 0-0 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.d3).

7.Be2 Qc7 8.d3 b6 9.Nbd2 Bb7 10.0-0 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.d3 Bb7 10.Nbd2 Qc7).

6.a4 Bd6 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.a4).

6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

6.c4 b6 7.Be2 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2 Nbd7).

6.c4 Bd6 7.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

6.c4 Bd6 7.Be2 0-0 8.0-0 b6 9.a4 Bb7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

6.c4 Bd6 7.Be2 0-0 8.0-0 Qe7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 Qe7).

6.c4 Be7 7.Be2 0-0 8.0-0 b6 9.Nc3 Bb7 10.a4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.Nc3).

6.Be2 Bd6 7.0-0 b6 8.c4 0-0 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6).

6.Be2 Bd6 7.c4 0-0 8.0-0 b6 9.a4 Bb7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

6.a4 0-0 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.a4 0-0 7.Be2).

6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0).

6.c4 0-0 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2).

6.c4 0-0 7.Be2 b6 8.0-0 Nbd7 9.a4 Bb7 10.d4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d4).

6.c4 0-0 7.Be2 Nbd7 8.0-0 b6 9.a4 Bb7 10.d4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0-0 8.0-0 d5 9.a4 Nbd7 10.d4).

6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0-0 6.Be2 c5).

6.Be2 0-0 7.0-0 Nbd7 8.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7 6.c4 0-0 7.Be2 Nbd7 8.0-0).

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

5.a4 a6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 c6).

5.a4 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 Be7 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 Be7).

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

5.a4 a6 6.Nf3 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.Nf3).

5.a4 cb5 6.ab5 b6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 cb5 6.ab5 b6).

5.a4 b6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 b6).

5.a4 Bd7 6.c4 cb5 7.ab5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 cb5 6.ab5 Bd7 7.c4).

5.a4 Bd7 6.c4 Be7 7.Nf3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 Bd7).

5.a4 Bd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.Nf3 c6 6.a4).

5.a4 Be7 6.c4 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).

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

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

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

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

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

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

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

5.Nf3 Bd6 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 c6).

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6).

5.a4 0-0 6.Nf3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.a4).

5.a4 a6 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 Bd6).

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

5.c4 0-0 6.Nf3 b6 7.Be2 Nbd7 8.0-0 Bb7 9.a4 c5 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.c4 0-0 6.Nf3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5).

5.c4 0-0 6.Nf3 Nbd7 7.d4 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.d4).

5.c4 c5 6.Nf3 0-0 7.Be2 Nbd7 8.0-0 b6 9.a4 Bb7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.c4 c5 6.Nf3 Nbd7 7.Be2 0-0 8.0-0 Qe7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 Qe7).

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

5.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7).

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

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

5.Nf3 0-0 6.c4 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6 8.Nf3 0-0 9.c4).

5.Nf3 0-0 6.c4 c5 7.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

5.Nf3 0-0 6.c4 Nbd7 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.Be2).

5.Nf3 0-0 6.Be2 b6 7.0-0 Bb7 8.d4 c5 9.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.d4 Bb7).

5.Nf3 0-0 6.Be2 c5 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5 7.Be2).

5.Nf3 0-0 6.Be2 Nbd7 7.0-0 c5 8.a4 b6 9.c4 Bb7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.a4 Bb7).

5.Nf3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Nbd7 8.Nf3 Bd6).

5.Nf3 b6 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 b6).

5.Nf3 c5 6.c4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0 6.c4 c5).

5.Nf3 c5 6.c4 0-0 7.Nc3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Nc3 0-0).

5.Nf3 c5 6.c4 0-0 7.d3 Nbd7 8.Nbd2 b6 9.Be2 Bb7 10.0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.d3 Bb7 10.Nbd2).

5.Nf3 c5 6.c4 0-0 7.d3 Nbd7 8.Nbd2 b6 9.Be2 Bb7 10.0-0 Qe7 11.a4 a5 12.ba6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.d3 Bb7 10.Nbd2 Qe7 11.a4 a6 12.ba6).

5.Nf3 c5 6.c4 0-0 7.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0).

5.Nf3 c5 6.c4 0-0 7.Be2 Nbd7 8.0-0 b6 9.a4 Bb7 10.d3 Qe7 11.Nbd2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.0-0 b6 9.d3 Bb7 10.Nbd2 Qe7 11.a4).

5.Nf3 c6 6.a4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd6 6.Nf3).

5.Nf3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3).

5.Nf3 Nbd7 6.c4 0-0 7.Nc3 c5 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.Nc3).

5.Nf3 Nbd7 6.c4 0-0 7.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 0-0 7.d4).

5.Nf3 Nbd7 6.c4 c5 (no 7.bc6) (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

5.Nf3 Nbd7 6.c4 c5 7.Nc3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Nc3).

5.Nf3 Nbd7 6.c4 c5 7.d3 0-0 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0-0 8.d3).

5.Nf3 Nbd7 6.d4 c5 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.d4).