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TESTB0 Release 2021-07-01
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 b6

(...)

2.a3 d5 3.Nf3=.

2.a3 e5 3.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.a3 b6).

2.Na3 Bb7 3.Nh3 (3.Nf3 Nf6=) 3...Nf6=+ 4.Nc4 g6 5.e3 Bg7 6.Bd3?? (better is 6.d4=) 6...Bg2 (better is 6...Ng8–+) 7.Nf4 (7.Rg1 Bh3 8.Qf3–+) 7...Bh1 8.Ke2 (8.Bb2 0–0–+) 8...Bb7 9.Ba3 (9.Bb2 d6 10.Ke1 e5–+) 9...Ng4 10.Qg1 (10.Bb2 Bb2 11.Nb2 Nh2–+) 10...Ba1 11.Qg4 (11.Qa1 f6 12.Qg1 Nh6–+) 11...Bg7 12.b5 (12.Nh5 Bf8 13.Ng3 h5–+) 12...c6 (12...d5!? 13.Nb2–+) 13.bc6 (13.Nh5 Rg8 14.Ng7 Rg7–+) 13...Bc6 14.e4 (14.Nh5 Bf8 15.Bb2 gh5–+) 14...0–0 (14...b5!? 15.Ne3–+) 15.h4 h5 16.Qg5 d6 17.Ng6 (17.Bb2 Bb2 18.Nb2 e5–+) 17...fg6 18.Qg6 Qe8 19.Qg5 (19.Qe8 Re8 20.Ne3 Bf6–+) 19...Qf7 20.Nd6 (20.Ne3 Qf2 21.Kd1 Qf3 22.Kc1 Be4 23.Bb2 Qh1 24.Nd1–+) 20...Qf2 21.Kd1 Qf3 22.Kc1 (22.Ke1 Qh1 23.Qg1 Qg1 24.Ke2 Rf2 25.Ke3 Qg3) 22…Qh1 (23.Qg1 Qg1 24.Bf1 Qf1; 22...Qf1 23.Bf1 Rf1) 0–1. Doobi – markmooney, ChessWorld.net, 2005.

2.a4 a5 3.Ba3 d5 (3...ab4 4.Bb4 Nc6 5.Bc3=+) 4.d4 (4.b5 Nf6=) 4...ab4=+ 5.Bb4 Nc6 6.c3 (6.Bc3 Ba6=+) 6...f5 (6...Nb4!? 7.cb4 e5–/+) 7.Na3 (7.Qb3 Na5 8.Qc2 f4=) 7...Na7 (7...Qd7 8.Nc2=+) 8.a5 (8.e3 Nf6=) 8...ba5=+ 9.Ba5 e6 (9...e5 10.e4 de4 11.Bb5 Nb5 12.Nb5=) 10.Nf3 (10.e3=) 10...g5 (10...Bd6!? 11.Bb4 Nc6 12.Bd6 cd6+=) 11.e4 (better is 11.Bb4 Bb4 12.cb4+/–) 11...de4? (better is 11...Ba3 12.Ra3 fe4+/–) 12.Ne5+– Ba3?? (better is 12...Nf6 13.Nb5 Bd6 14.Na7 Ra7 15.Bb5 Kf8+–) 13.Qa4 (better is 13.Qh5 Ke7 14.Qg5 Ke8 15.Qh5 (15.Ra3?? Qg5 16.Ra1 e3–+) 15...Ke7 16.Qf7 Kd6 17.Qg7+–) 13...Bd7= 14.Qa3 (< 14.Qd7 Qd7 15.Nd7 Nb5 16.Bb5 Ra5=+) 14...Ne7 (14...Nc6 A) 15.Nd7 Ra5 (< 15...Na5 16.Ne5 Ne7 17.Bb5 Kf8 18.Nc6 Nac6 19.Qa8 Qa8 20.Ra8 Kg7 21.Bc6 Nc6 22.Rh8 Kh8 23.0–0+–; 15...Qd7?! 16.Bb5=) 16.Qb2 Ra1 17.Qa1 Qd7–+; B) 15.Qc5 Qe7 B1) < 16.Nd7 B11) 16...Na5 17.Qc7 (17.Ra5?! Ra5 18.Qa5 Kd7+/–) 17...Qd7 18.Qe5+/–; B12) 16...Qd7?! 17.Bb5 Nge7 18.Ra4=; B13) 16...Kd7 17.Bb5 Qc5 18.dc5 Nge7–/+; B2) 16.Qb5=) 15.Qc5 (15.Bb4 Rg8+=) 15...Qc8 (15...Nac6 A) 16.Nd7 A1) < 16...Ra5 17.Ra5 Na5 18.Nf6 (18.Qa5?! Kd7 19.Bc4 Qa8 20.Qb5 c6=+) 18...Kf7 19.Ne4+/–; A2) 16...Qd7 17.Bc4 Qd6–+ (17...Ra5?! 18.Ra5 Na5 19.Qa5=+); B) 16.Bb5 Ne5 17.Qe5=) 16.Bb4 (16.h4 g4 17.Bc7+=) 16...Nec6? (16...Nac6 17.Ba3 Qd8 18.Be2+=) 17.Ba6 Qb8+/– 18.Nc6 Nc6= 19.d5? ed5–/+ 20.Qd5 Nb4 21.Qe5 Kf7 22.Bc4 Kf8?? 23.Qh8 Ke7+– 24.Qh7 Kd6 25.Rd1 Kc5 26.cb4 Qb4 27.Ke2?? Qc4–+ 28.Ke1 Qb4? 29.Kf1+– Qb5 30.Kg1 Ra2 31.Rc1 Kb6 32.Qg6 c6 33.Qg5 Qe2 34.Qe3?? c5?? 35.Qc5+– Kb7 36.Qd5 Kb6 37.Qd6 Ka5 38.Rc5 Bb5 39.Qc7 Kb4+= (40.Rb5 Qb5+–). bjhaskins – ashipham, net–chess.com, 2003.

2.a4 c6 3.Nf3 d5 4.a5 b5 5.Bb2 a6 6.Bd4 Bb7 7.Nc3 Nd7 8.e3 e6 9.Ne2 Ngf6 10.c3 Ne4 (10...Bd6 11.Bf6 Nf6 12.Ned4=+) 11.d3 (11.h3 c5 12.bc5 Nec5=+) 11...Nef6 (11...c5 12.bc5 Nec5 13.Nf4=+) 12.Rb1 (12.Ng3 Qc7=) 12...Be7 13.Qb3 (13.g4 Ng4 14.Bh3 Ngf6–/+) 13...h6 14.Ne5 Ne5 15.Be5 Bd6 16.f4 (better is 16.Bd6 Qd6 17.Ng3=) 16...Be5–+ 17.fe5 Nd7 (better is 17...Ng4!? 18.Nf4 Qg5–/+) 18.d4 Qg5 19.Nf4 Nf8 20.Bd3 0–0–0 (20...f6 21.ef6 gf6 22.Qd1+=) 21.0–0+/– Ng6 (better is 21...f6!? 22.ef6 gf6+/–) 22.Bg6+– fg6 23.Ne6 Qe3 24.Kh1 Rde8 25.Rbe1 (25.Ng7 Re7–/+) 25...Qd3? (better is 25...Qd2 26.Nc5 Re7+–) 26.Nc5 (26.Ng7 Re7–/+) 26...Qd2 27.Qb1 (27.c4 Kb8 28.cd5 Qd4+–) 27...Qc3? (27...Re7 28.Qg6 Rhe8 29.Rd1+–) 28.Qg6 (28.Rf7 Qd4 29.Qg6 Qc5 30.bc5+–) 28...Qd4 (28...Re7+–) 29.Qg7 Qb4 (29...Qc5 30.bc5 Reg8+–) 30.Qb7 Kd8 31.Qd7# 1–0. Trkn – guest6103, ICC, 2004.

2.a4 Nc6 3.b5= Ne5 4.Bb2 d6 (4...Nc4 5.Bd4=) 5.Nc3 Nf6 (5...Nc4 6.Bc1=) 6.Nf3 (6.e3 Bb7+=) 6...Nf3 (6...Nc4 7.Bc1=) 7.gf3 Bb7 (7...a6 8.e3+=) 8.d3 (8.a5 ba5 9.Ra5 d5+=) 8...e5 9.Bh3 (9.Rg1 a5=) 9...Be7. georginoh (1715) – johnwinston (2215), net–chess.com, 2013.

2.a4 e5 3.b5 a5 (--> 1.b4 a5 2.b5 b6 3.a4 e5).

2.a4 Nf6 3.Nf3=+.

2.Bb2 e5 (--> 1.b4 e5 2.Bb2 b6).

2.b5 a5 (--> 1.b4 a5 2.b5 b6).

2.b5 d5 3.Nf3 a6 4.e3 ab5 5.Bb5 Bd7 6.Be2 Nf6 7.Bb2 e6 8.0–0 Bd6 9.Be5 0–0 10.d4 Ne4 11.Bd6 Nd6 12.Nbd2 c5 13.dc5 bc5 14.c4 Ba4 15.Qc1 Nd7 16.Qc3 Qe7 17.Rfb1 Rfc8 18.Rb2 Bc6 19.Rab1 Ra4 20.Bd1 Ra7 21.Bb3 Rca8 22.cd5 ed5 23.Qc1 Qf6 24.Nd4 cd4 25.Qc6 Ne5 26.Qb6 Nd3 27.Bd5 Qf2 28.Kh1 Nb2 29.Ba8 Ra8 30.Qd4 Re8 31.Qd6 Qe3 32.h3 Na4 33.Nc4 Qe2 34.Rb8 g6 35.Re8 Qe8 36.a3 Qe1 37.Kh2 Qe4 38.Qb8 Kg7 39.Qe5 Qe5 40.Ne5 Kf6 41.Nd3 Kf5 42.Kg3 Ke4 43.Nf2 Kd4 44.Kf4 Nc5 45.Kg5 f5 46.Kh6 g5 47.Kg5 Ne4 48.Kf5 Nf2 49.Kg5 Nd3 50.h4 Ne1 51.g3 Nc2 52.Kh6 Ne3 53.Kh7 Nf5 54.Kg6 Ng3 55.Kg5 Ne4 56.Kf5 Ng3 57.Kf4 Nh5 58.Kg5 Ng3 59.Kg4 Ne4 60.Kf4 Nf6 61.Kf5 Ne4 62.a4 Ng3 63.Kg4 Ne4 64.Kf4 Nf6 65.Kf5 Nh5 66.a5 Kc5 67.Kg5 Ng3 68.Kg4 Ne4 69.Kf4 Nf6 70.a6 Kb6 71.Kf5 Nd5 72.h5 Ne7 73.Kf6 Ng8 74.Kg7 Ne7 75.Kf7 Nf5 76.Kf6 Nh6 77.Kg6 Ng8 78.a7 Ka7 79.Kg7 Ne7 80.Kf7 Nf5 81.Kf6 Nh6 82.Kg5 Ng8 83.Kg6 Ne7 84.Kf6 Ng8 85.Ke6 Nh6 86.Ke5 Ng4 87.Kf4 Nh6 88.Kg3 Ng8 89.Kf3 Nf6 90.h6 Nh7 91.Ke4 Nf8 92.Ke5 Kb6 93.Kf6 Kc5 94.Kf7 Nh7 95.Kg7 Ng5 96.Kg6 Ne6 97.Kh5 Nf8 98.Kg4 Nd7 99.Kf5 Nf8 100.Kf6 Nh7 101.Ke5 Ng5 102.Kf5 ½–½. bambinik – PolarChess, internet, 2002.

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

2.c3 a6 3.d4 d5 4.Nf3 Nc6 5.g3 Nf6 6.Bg2 Bb7 7.0–0 e5 8.de5+/– Ng4 9.Bg5 Be7 10.h3 Nge5= 11.Be7 Nf3 12.Bf3 Ne7 13.Nd2 0–0 14.Nb3 Qc8 15.Bg2 Ng6 16.g4 Nf4–/+ 17.e3 Ng2 18.Kg2 d4 19.Kg1 de3 20.fe3 c5 21.Qc1? Qc6–+ 22.Rf4 Qg2# 0–1. LuckyMiki – Rudolf, internet, 2007.

2.c3 c6 3.e3 (3.e4 d5=) 3...f6 (3...e5 4.d4 e4 5.d5+=) 4.Nf3 (4.d4 d5+=) 4...g6 (4...e5 5.Be2=) 5.d4 Bg7 6.Bb2 Bb7 7.Bd3 d6 8.Qc2 e6 9.Nbd2 Ne7 10.0–0 Nd7 11.Rfe1 Qc7 12.e4 0–0–0 (12...a5 13.a3+/–) 13.a4 Rhg8 (13...g5 14.a5+–) 14.a5+– ba5 (14...b5 15.c4 bc4 16.Bc4+–) 15.ba5 (better is 15.Ra5!? Kb8+–) 15...a6 16.Ba3 Rdf8 (16...g5 17.Nc4 c5 18.dc5 dc5 19.Nd4+–) 17.Rab1 (17.Bc4 Rh8+–) 17...Kd8 (17...Re8 18.Qb3 c5 19.Nc4+– (19.Qe6?! Nd5 20.ed5 Re6 21.de6 Nb8+–)) 18.Rb2 f5? 19.ef5 gf5 20.Reb1 e5?? 21.de5 Be5 22.Rb7 Qb7 23.Rb7 Nc8 24.Ne5 Ne5 25.Rb6! Nb6 26.ab6 Ke8 27.f4 Nd7 28.g3 Nb6 29.Nc4 Nc4 30.Bc4 d5 31.Bf8 Rf8 32.Bd5! cd5 33.c4 dc4 34.Qc4 Rg8 35.Kf2 h5 36.Qa6 h4 37.Qd3 Rg3 38.hg3 hg3 39.Qg3 Kf7 40.Qe3 Kg6 41.Qg3 (41.Qg3 Kf7 42.Qg5+–) 1–0. Fournier,Frederic (1795) – Tsun (1700), Active blind, 2011.

2.c3 Nf6 3.Bb2 e6 4.e3 d5 5.Nf3 Bd6 6.Nd4 Bd7 7.Qc2 c5 8.bc5 bc5 9.Ne2 Ne4 10.g3 a5 11.Bg2 f5 12.Be4 fe4–/+ 13.c4 a4 14.cd5 ed5 15.Bg7 Rg8 16.Bc3 Bh3 17.Na3 Bd7 18.Nf4 Bf4 19.ef4 Na6 20.0–0 Bg4 21.Be5 Qd7= 22.d3?? Bf3–+ 23.Rab1? Rc8 24.Rfc1?? Kf7 25.Kf1?? Qh3 26.Ke1=+ Qh2 27.Qa4 Qg1 28.Kd2 Qf2 29.Kc3 d4 30.Kc4?? Qa2–+ 31.Rb3 Nb8?? 32.Qa7 Kg6 33.Qe7 Rcf8 34.Qg5 Kf7 35.Qf6 Ke8 36.Qe6 Kd8 37.Rc2 Qb3 38.Kb3 Rg6 39.Qd5 Nd7 40.de4 Bd1 41.f5 Rb6 42.Ka2 Bc2 43.Nc2 Ke7 44.f6 Rff6 45.Bf6 Rf6 46.Qg5 Kf7 47.Na3 Rf2 48.Kb3 Rf3 49.Kb2 Re3 50.Qf5 Nf6 51.Qc5 Re4 52.Nc4 Kg7 53.Qg5 Kf7 54.Nd6 Ke6 55.Ne4 Ne4 56.Qg8 Kd6 57.Qh7 Kd5 58.g4 d3 59.Qd7 Kc4 60.Qc6 Kd4 61.Kc1 Ke3 62.Qe6 Kf3 63.Qf5 Ke3 64.g5 d2 65.Kc2 Nf2 66.Qf2! Kf2 67.Kd2 (67...Kf3 68.g6+–) 1–0. pbram143 – Rudolf, internet, 2007.

2.c3 h5 3.a4 Bb7 4.a5 g5 5.a6 Ba6 6.Ra6? (better 6.h3!?=+) 6...Na6–/+ 7.e3 c5?? (better 7...Nb8–+) 8.Ba6+– e6 9.Be2 (9.bc5 Bc5 10.Na3 Nf6+–) 9...cb4 10.cb4 Bb4 11.Nf3 a5 12.Bb2 Rh6 13.Bc3 (13.Nc3 g4 14.Ne5 f6+–) 13...Bc5 (13...g4!? 14.Ne5 Nf6+–) 14.0–0 g4 15.Ne5 Qg5 (15...Nf6!? 16.Qa4 Bd6+–) 16.d4+– Bd6 17.g3 (17.Nd2 Nf6+–) 17...f6 (17...Nf6!? 18.Nd2 h4+–) 18.Nc4+– Bc7 19.Nba3 h4 20.f4?? (better 20.Bg4 hg3 21.fg3+–) 20...Qf5?? (better 20...gf3 21.Bf3 Rd8=+) 21.Bd3 (21.Bg4 Qh7 22.Nb5 Rc8 23.Nbd6 Kd8 24.Nc8 hg3 25.N8b6 f5+–) 21...Qd5? (21...Qh5!? 22.Be1 Kd8+–) 22.e4 (22.Nb5 Rc8 (22...Qb5?? 23.Nd6 Bd6 24.Bb5+–) 23.Qg4 Kf8 24.Nc7 Rc7+–) 22...Qh5 23.Be1 d5 (23...Kd8 24.gh4 b5 25.Ne3+–) 24.ed5 Qd5 25.Bf2?? (better 25.Nb5! Rc8 26.Ne3+–) 25...hg3=+ 26.Bg3 Qd4 27.Rf2 Rh5?? (better 27...0–0–0 28.Nb2 Qc5=+) 28.Nb5!! Qc5 (28...Rb5 29.Bg6 Double attack) 29.Nc7 Qc7 30.Qg4 (30.Qg4 Rh8 31.Qe6 Kf8 32.Ne5+–) 1–0. AXF – Eries (1650), ChessWorld.net, 2015. (=1.c3 b6 2.b4 h5)

2.Nc3 Bb7 3.h4 g6 4.Rh3 Bg7 5.Ne4?? Nf6 6.Ng5 Na6 7.a3 Nd5 8.b5?? Nc5?? 9.a4?? Ba1–+ 10.N1f3 Nf4 11.Ba3 h6 12.Rg3 Na4 13.Qa1 Rh7?? 14.Nh7+– a6 15.Qh8 1–0. dudetom – meccabilly, net–chess.com, 2001.

2.c4 c5 3.bc5 bc5 4.Nf3 Nc6 5.Nc3 Rb8 6.e3 (6.e4 Nf6=) 6...Qa5 (6...e5 7.Be2=) 7.a3 g6 8.Ra2 Bg7 9.Bb2 Nh6 10.Be2 0–0 11.0–0 e6 12.Qc2 d5? 13.cd5+/– ed5 14.Nd5 Bf5 15.Qc1 Be6 16.Bg7 Kg7 17.Bc4 f6 18.d3+– Nf7 19.Nf4 Bc4 20.Qc4 Rfc8 21.Qc5! Rb5 22.Ne6 Kg8 23.Qc1 Ne7 24.Qa1 Nd5 25.d4 Rcb8 26.Nc5 Nd6 27.Rc2 f5 28.Qa2 Nf7 1–0. Melich,Jindrich (2170) – Moravcik,Rastislav (2080), Ceske Budejovice op, 1996.

2.c4 Nc6 3.a3 e5 (3...Nf6 4.d4 e5 5.e3 e4 6.Bb2 d5 7.cd5+=; 3...a5 4.b5 Ne5 5.e4 Ng6 6.d4 Bb7 7.Nc3=; 3...Bb7 4.d4 (4.Nf3 e5 5.d3 Nd4 6.e4 Nf3 7.Qf3=; 4.e3 Ne5 5.h4 d5 6.cd5 Qd5 7.d4+=; 4.Nc3 e5 5.Nf3 Bd6 6.Ne4 Be7 7.Ng3=) 4...Nf6 5.Nf3 e6 6.e3 a5 7.b5+=) 4.d3 (4.e3 Nf6 5.Bb2 Qe7 6.Nc3 Bb7 7.Nge2=; 4.g3 d5 5.Bg2 Be6 6.Qa4 Qd7 7.Bb2=; 4.Nc3 Nf6 5.b5 Nd4 6.e3 Ne6 7.Qf3=; 4.Bb2 a6 5.e3 Qe7 6.Ne2 Bb7 7.d4=; 4.b5 Na5 5.d3 a6 6.Nf3 d6 7.e4=) 4...Nf6 (4...a6 A) 5.g3 Nf6 (5...Bb7 6.Bg2 Nf6 7.Bb2=) 6.Bg2 Bb7 7.Bb2=; B) 5.Nf3 Nf6 6.Nc3 Bd6 7.e4= 5.Bb2 (5.Nf3 Be7 (5...a6 6.Nc3 d6 7.g3=) 6.b5 Na5 (6...Nd4 7.Ne5+=) 7.Ne5=) 5...d6 (5...Bd6 6.Nf3 A) 6...0–0 7.b5+= (7.e3=); B) 6...a6 7.e4=; 5...a6 6.Nf3 Bd6 7.e4=) 6.Nc3 (6.g3 Bb7 7.Bg2=; 6.Nf3 a6 7.e3=) 6...a6 (6...Be7 7.e3= (7.g3=)) 7.Qa4 (7.g3=) 7...Bd7 8.0–0–0?? (better is 8.e3=) 8...Nd4–+ 9.Nb5 (9.Qd7 Qd7 10.e3–+) 9...ab5 10.Qa8 Qa8 11.cb5 Bb5 (better is 11...Qa4 12.Rd2 Nb3 13.Kd1 Nd2 14.Kd2 Bb5–+) 12.Nf3 Ng4 13.Rd2 Nb3 14.Kc2 Nd2 15.Kd2 Nf2 16.Rg1 Ng4 17.d4 f6 18.g3 g6 19.Rg2 Bh6 20.Ke1 Ne3 21.Rg1 Nf1 22.Kf1 Be3 23.de5 Bg1 24.Kg1 Be2 25.Nd4 fe5 26.Ne2 Rf8 27.g4 Qf3 28.Ng3 Qd1 29.Kg2 Qd2 30.Kh3 Qb2 31.Ne4 h6 32.Kh4 Qh2# 0–1. bsjostedt – donsjostedt (1650), net–chess.com, 2007. (=1.c4 b6 2.b4)

2.c4 d6 3.d4 Bb7 4.e3 Nf6= 5.Nf3 h6 6.Be2 e6 7.0–0 Be7 8.Nbd2 Nbd7 9.a4 c5= 10.bc5 bc5 11.a5 a6 12.Bb2 0–0 13.Re1 Ne4 14.Ne4+= Be4 15.Nd2 Bc6 16.Bf3 Bf3 17.Qf3 Bf6 18.Ne4 cd4 19.Nf6 Nf6 20.Bd4+= e5 21.Bb6 Qd7 22.Rec1 Qg4? 23.Qg4+= Ng4 24.c5 dc5+= 25.Rc5 f6? 26.h3+– Nf2 27.Kf2 Rf7 28.Rc7 Rc7 29.Bc7 g5 30.Rd1 Kg7 31.Rd6 h5 32.e4 g4 33.Kg3 Kg6 34.h4 Ra7 35.Bb6 Ra8 36.Bd8 Kf7 37.Rf6 Ke8 38.Bb6 Rc8 39.Re6 Kd7 40.Re5 Rc3 41.Kf4 Rc2 42.g3 Rf2 43.Kg5 Kd6 44.Rf5 Rg2 45.Rf6 Ke5 46.Bc7 Ke4 47.Ra6 1–0. gtate (1965) – rdarmi (1650), net–chess.com, 2004.

2.c4 e5 3.a3 Bb7 4.Bb2 d6 5.Nf3 Nf6 6.g3 Nbd7 7.Bg2 Ng4 (7...e4!? 8.Nd4 c5=) 8.0–0+= g6 (8...e4 9.Nd4+=) 9.h3 (9.Ne5 Bg2 10.Nd7 Bf1 11.Bh8 Bh3 12.Nf8 Kf8+–) 9...Ngf6 10.Ne5 Bg2 11.Nd7 Kd7 12.Kg2 Qe7 (12...Bg7 13.Qb3+–) 13.Nc3 Qe6 (better 13...Bg7+–) 14.Qa4 c6 (14...Kd8 15.Qc6 Rc8 16.Nb5+–) 15.b5 c5 (15...cb5 16.Nb5 Kd8 17.Bf6 Qf6 18.Na7 Bg7+–) 16.Qa6 Ke7 (16...Kc7 17.Nd5! Nd5 18.cd5 Qd5 19.e4 Qe4 20.f3 Qc2 21.Bh8 Qd2 22.Rf2 Qa5 23.Qa5 ba5+–) 17.Qb7 (17.Qb7 Qd7 18.Qa8+–) 1–0. pcmvr – smoothoperator, net–chess.com, 2018.

2.d3 Bb7 3.Nc3 e6 4.a3 d6 5.Nf3 Bf3 6.ef3 d5 7.g3 g6 8.b5 Bg7=+ 9.Bd2 Ne7 10.Bg2 0–0 11.0–0 Nd7 12.a4 Rc8 13.a5 c6 14.ab6 ab6 15.Ra2 cb5 16.Nb5= Rc6 17.Bb4 Nf6 18.Ra7 Re8 19.f4 Bf8 20.Bc3 Nd7 21.Qa1 Nc8 22.Ra8+= Nc5 23.Rb1 Qd7 24.Be5 Bd6 25.Bh8 Kf8?? 26.Qg7+– Ke7 27.Qh7 Qb7 28.Rba1 Bc7 29.R1a7 Qa7 30.Na7 Na7 31.Bf6 Kf8 32.Qg7# 1–0. pierre – sysyphos, internet, 2009.

2.d3 e5 3.c3=.

2.d3 e6 3.a3 Qf6 4.d4 Nc6 (4...c5 5.c3=) 5.Nf3 e5 6.Nc3 e4? (better is 6...Nd4 7.Nd4 ed4=) 7.Ne4+/– (7.Ne4 Qe7 8.Nc3+–) 1–0. pierre – maqin, internet, 2010.

2.d3 g6 3.Nc3 Bg7 4.Bd2 d5 5.g3 Bb7 6.Nf3 d4 7.Ne4 Be4 8.de4= Nf6 9.Bg2 c6 10.e5 Ne4? 11.Bf4+/– c5 12.Qd3+– Nc6 13.Qe4 Qd7 14.b5 1–0. pierre – holyday4, internet, 2011.

2.d3 h6 3.Bb2 e6 4.e4 (better is 4.a3!?=) 4...Bb4–/+ 5.Nd2 Nf6 6.Ngf3 Nc6 7.c3 Ba5 (7...Be7 8.d4–/+) 8.Nc4 d5 9.Na5 Na5 10.e5 Nd7 11.Ba3 c5 12.d4 0–0 13.Bd3 f6 14.Qc2? (14.Qe2 Nc6=+) 14...f5 (14...fe5 15.de5 Nc6 16.Qe2–+) 15.g4? (15.0–0 Bb7=) 15...g6?? (better is 15...fg4 16.Ng1 Bb7–+) 16.Rg1 Qe7?? (16...fg4 17.Be2 Kg7 (17...Rf3?? 18.Qg6 Kf8 19.Bf3+–) 18.Rg4 Rf5=) 17.gf5+/– ef5 18.Rg6 Kh7 19.Bf5 Qf7 (19...Ne5 A) 20.Ne5?? Bf5 (< 20...Rf5 21.Bc1+=) 21.Rh6 Kh6 22.Qd2 Kh7–+; B) 20.Re6 Kg8 21.Re7 (21.Re5?! Bf5 22.Qf5 Rf5 23.Re7 Rf3 24.dc5 Nc6+=) 21...Nf3 22.Ke2 Bf5 23.Qa4 cd4 24.Qb5+– (24.cd4?! Nc6+/–)) 20.Rh6! Kh6 21.Qd2 Kg7 22.Qg5 Kh8 23.Nh4?? (better is 23.Qh6 Kg8 24.Be6 Ne5 25.Bf7 Nf7 26.Qg6 Kh8 27.0–0–0+–) 23...Qg7?? (better is 23...Ne5 24.Qh6 Kg8 25.Qg5 Qg7 26.Qg7 Kg7 27.Bc8 Nec4 (27...Rfc8?! 28.de5 Rh8 29.Nf5 Kf7 30.Bc1–+) 28.Bc5 Re8 (28...Rac8?! 29.Bf8 Rf8 30.Ke2–+; < 28...bc5 29.Ba6–+) 29.Kf1 Rac8–+) 24.Ng6+– Kg8 25.Ne7 Kf7 26.Be6!! Ke6 27.Qg7 Rf7 28.Qg5 Re7 29.Qg6 Nf6 30.Qf6 (30.ef6 Rd7 31.f7 Ke7+–) 30...Kd7 31.dc5 (31.Qd6 Ke8 32.dc5 Re6 33.Qd5 Nc6+–) 31...Re6 32.Qf7 (better is 32.Qg7 Kc6 33.cb6 ab6 34.Bd6+–) 32...Re7 (32...Kc6 33.f4 bc5+–) 33.e6 (33.Qd5 Ke8 34.Qg8 Kd7 35.Rd1 Kc7 36.cb6 ab6 37.Qd8 Kb7 38.Qe7 Ka6+–) 33...Kd8 34.Qf8 Re8 35.Qd6 Bd7 36.Qd7# 1–0. goffy – Garyman, ChessWorld.net, 2005.

2.d4 Ba6 3.a4 (3.Nc3 Nf6=) 3...c6 (3...Bb7 4.Nc3=) 4.a5 (4.Nc3 Nf6+=) 4...ba5 (4...e6 5.c3+=) 5.ba5 (5.Ra5!? Nf6 6.c3+=) 5...e6 6.Na3 (6.Nf3!?=) 6...Qa5 (6...Bb4 7.Bd2 Qe7 8.Nb1–/+) 7.Bd2+= Qd5 (7...Qa4!?+=) 8.f3 (better is 8.Nf3=) 8...Qd4–/+ 0–1. liame – wecenbarger (2330), net–chess.com, 2014. (=1.d4 b6 2.b4 Ba6)

2.d4 c6 3.e4 Ba6 4.Ba6+= Na6 5.c3 e6 6.f4 Be7 7.g3 Nf6 8.e5 Ng8 9.Nh3 g6 10.Nf2 Rb8 11.h4 f5 12.a4 b5? 13.ab5+– cb5? 14.Ra6 Qc8 15.Ra7 Ra8 16.Ra8 Qa8 17.Nd2 Nh6 18.Nd3 Qh1–/+ 19.Nf1 0–0 20.Nf2 Qb7 21.Nh2 Qc7 22.Qc2? Ra8 23.Kd2 Ra6 24.Ke3 d5 25.Nd3 Qa7 26.Nf3 Ra2 27.Qd1?? Ng4# 0–1. Homann,Arne (1805) – Grand,Thorsten (1785), remoteschach.de, 2003. (=1.d4 b6 2.b4)

2.d4 e5 3.a3 d5 (better is 3...ed4!? 4.Qd4 Bb7=) 4.de5+/– Nd7 (better is 4...a5!? 5.b5 Ne7+/–) 5.Qd5+– Rb8 6.e6 fe6 7.Qe6 Be7 8.Bg5 (8.e4 b5+–) 8...Ndf6 9.Qe4?? (better is 9.Qe5+–) 9...Ne4–+ 10.Be7 (10.Be3 Bf6 11.c3 Nc3–+) 10...Qe7 (better is 10...Qd4 11.Nf3 Qa1 12.Nfd2 Ke7 13.Ne4 Qb1 14.Kd2–+) 11.f3 Qf6 12.Ra2 Nd6 13.c3 Be6 14.g4 Ba2 15.Nd2 Qc3 0–1. danelson (1905) – rhometal (2020), net–chess.com, 2010.

2.d4 f6 3.d5 e5 4.de6 de6 5.Qd8 Kd8 6.a3 Nc6 7.Bb2 Nge7 8.Nc3 Nf5 9.0–0–0 Ke7 10.g4 Nfd4? 11.Ne4?? e5+= 12.Bg2 Rb8 13.e3+/– Ne6 14.Nf6 Kf6 15.Bc6+– Bd6 16.f4 Rf8 17.Nf3 Kf7 18.Ne5 Be5 19.Be5 Bb7 20.Rd7 Kg8 21.Bb7 Rb7 22.f5 Ng5 23.h4 Nf7+– 24.Bc7 Rc8+/– 25.Bf4?? Rd7–+ 26.g5 Nd6 27.Rd1 Rcd8 28.g6 hg6 29.fg6 Nf5 30.Rd7 Rd7 31.c4? Nh4 32.c5 bc5 33.bc5 Ng6 34.c6 Rd5 35.c7 Rc5 36.Kd2 Nf4 37.c8Q Rc8 38.ef4 Rc4 39.f5 Rf4 40.f6 Rf6 41.a4 Ra6 42.Kc3 Ra4 43.Kb3 Rf4 44.Kc3 g5 45.Kd3 Kg7 46.Ke3 Kf6 47.Kd3 Kf5 48.Ke3 a5 49.Kd3 a4 50.Kc3 g4 51.Kb2 g3 52.Ka3 Kg4 53.Kb2 g2 54.Ka3 g1Q 55.Kb2 Qe3 56.Kc2 Rf2 57.Kd1 Qd2# 0–1. MasterofDisaster – chaser, Caissa.com, 2004.

2.e3 Nc6 3.Be2 (3.b5 Ne5=) 3...Bb7 (3...Nb4 4.Nf3+=) 4.Nf3 (4.b5 Ne5 5.Nf3 Bf3 6.gf3 e6=) 4...e5 (4...Nb4 5.a3 Nc6 6.0–0+=) 5.c3 (5.b5 Nce7+=) 5...Qe7 (5...e4!? 6.Nd4 Nd4 7.ed4 a5+=) 6.b5+= Nd8 7.Na3 (7.Ba3 d6+=) 7...Nf6 (7...e4 8.Nd4=) 8.Nc4 g6 (8...e4 9.Ba3 d6 10.Nd4=) 9.0–0 (9.Ba3 d6 10.Nce5+/–) 9...d5? (9...e4 10.Nd4+=) 10.Na3?? (better is 10.Ba3 Qe6 11.Bf8 dc4 12.Bg7+/–) 10...Bg7 (10...e4 11.Nd4=) 11.Rb1 (11.d4 e4 12.Ne5 c5+=) 11...e4 12.Nd4 0–0 13.Rb3 Ne6 14.Bg4 Nd4 15.cd4 a6 16.d3 Bc8 17.Bh3? Bh3–+ 18.Re1?? Bg4 19.de4 Bd1 20.Rd1 Ne4 21.ba6 Ra6 22.Nb5 c6 23.a4 Ra4 24.Rc3 cb5 25.Rc6 b4 26.Rb6 b3! 27.Rb5 Nc3 28.Rd3 Nb5 29.Rb3 Ra1 30.g3 Rc1 31.Kg2 Qe4 32.Kh3 Rg1 33.Rb5 Qf5 34.g4 Qg4 0–1. markcav – sbrock, net–chess.com, 2002.

2.e4 a5 3.ba5 Ra5 4.d4 g6 (4...d5 5.e5=) 5.Bd2 Ra8 6.Nf3 Bg7 7.e5 f6 8.Be2 fe5 9.de5 Nh6 10.c3 (10.Bc4!? Nc6 11.Qe2+=) 10...Nf7 11.Bf4 e6 12.0–0 Nc6 13.Nbd2 Nce5 14.Be5 (14.Ne5 Ne5 15.Re1 0–0 16.Be5 Be5–/+) 14...Ne5 15.Rc1 0–0 16.Ne5 Be5 17.Ne4 Ra2 18.Rc2 Ra8 19.c4 Bb7 20.Bd3 Qh4 21.g3 Qh3 22.Ng5 Qg2 0–1. pinecrest1981 – Lustochliv, Live Game Caissa's Web, 2004.

2.e4 a6 3.e5 (3.Nc3 Bb7=) 3...Bb7 (3...Nc6 4.Qf3=) 4.Nc3 (4.d4 d6 5.Nf3 de5 6.Ne5 Nf6=) 4...e6 (4...Nc6 5.Nf3 Nb4 6.Be2+=) 5.d4 (5.a3 d6 6.Nf3 Nd7=) 5...b5 (5...Bb4 6.Bd2–/+) 6.a4 (better is 6.a3!?=) 6...Bb4+= 7.Bb2 (7.Bd2 ba4 8.Rb1 a5+=) 7...c5 (7...ba4 8.Ra4 Qe7 9.Nf3–/+) 8.dc5 (8.ab5 ab5 9.Ra8 Ba8 10.dc5 Qa5+=) 8...Bc6 (better is 8...Qa5 9.Nge2 ba4–/+) 9.Qg4+= Bc3 (9...Qa5 10.Nge2 Bc5 11.Qg7 b4 12.Qh8 Kf8+–) 10.Bc3+/– g6 11.ab5 h5 12.Qd4 Bb7? 13.Ba5+– Qe7 14.Bc7 f6 15.ef6 Nf6 16.Nf3 Bf3 17.gf3 d5? 18.Qe5 0–0? 19.Bh3 Qc5?? 20.Be6 Kg7 21.Bb8 Qb4?? 22.Kd1 Rab8 23.Qc7?? Kh6 24.ba6?? Qd4+/– 25.Kc1?? Qa1–+ 26.Kd2 Qh1 27.Qf4 g5 28.Qe3 Rfe8 29.h4 Qh4 30.Qe5 Nd7! 31.Qf6 Nf6 (31...Nf6 32.Kc1 Qf4 33.Kd1 Rb1 34.Ke2 Qc4 35.Kd2 Qd4 36.Ke2 Re6) 0–1. jbneville – thirdcoast, net–chess.com, 2003. (=1.e4 b6 2.b4)

2.e4 Ba6 3.Ba6 Na6 4.a3 c5 5.Bb2 (5.Qe2 Nc7 6.Bb2+=) 5...d5 (5...cb4 6.Nf3=) 6.b5 (better 6.c4!? Nc7 7.Qa4 Qd7 8.Qd7 Kd7 9.ed5+–) 6...Nc7= 7.a4 de4 8.Qg4 Qd5 (8...e6 9.Qe4 Nd5 10.a5=) 9.Bg7 (9.Nc3!? Qc4 10.Qe4 Qe4 11.Ne4+=) 9...Bg7 (9...h5 10.Qg3 h4 11.Qc7 Bg7 12.Ra3=+) 10.Qg7 Rd8?? (better 10...Qd4 11.Qd4 cd4=) 11.Qh8+– Qd2 (11...Qg5 12.Nh3 Qg6+–) 12.Nd2 Nb5 1–0. alaindubleu – geomma, lichess.org, 2017. (=1.e4 b6 2.b4 Ba6)

2.e4 c6 3.c4 (3.Nc3 e6+=) 3...g6 (better is 3...a5 4.ba5 Ra5+=) 4.d3 (4.Nc3 a5 5.b5 cb5 6.Nb5 Bg7+=) 4...e5 (better is 4...Bg7!? 5.d4 c5–/+) 5.a3= h6 (5...a5=) 6.g4 (better is 6.Nf3!?+/–) 6...d6 (6...Nf6 7.Nf3+=) 7.h3 (7.Nc3 a5 8.b5 Nf6=) 7…g5. bsjostedt – tmitchell (1955), net–chess.com, 2008. (=1.e4 b6 2.b4)

2.e4 Nc6 3.b5 Ne5 4.Nf3 d6 5.Ne5 de5 6.d3 Nh6 7.c4?? f5?? 8.ef5?? Qd4+= 9.Bb2?? Qb2–+ 10.Nd2 Nf5 11.Be2 Nd4 12.0–0 Bf5 13.h3 Rd8 14.a4 e4 15.Bh5 g6 16.Be2?? ed3 17.Rb1 Qc3 18.Rc1 de2 19.Rc3 ed1Q 20.Rd1 e5 21.Re1 Bb4 22.Re5 Be6 23.Rd3 Ne2! 24.Re2 Rd3 25.Re6 Kd7 26.Re4 Rd2 27.Kh2 Bd6 28.f4 g5 29.Kg3 gf4 30.Kg4 h5 31.Kf5 Rf8 32.Kg6 Rg2 33.Kh7 f3 34.Re1 f2 (35.Re3 f1Q 36.Re7 Be7 37.a5 Qd3 38.Kh6 Qg6#) 0–1. jlvanoster (1675) – wonderhorse (1635), net–chess.com, 2006.

2.e4 d5 3.ed5 Qd5 4.Nc3 Qe5 5.Be2 Nc6 6.Nf3 Qe6 7.b5 Nb4 8.Ba3 Nd5 9.Nd5 Qd5 10.c4 Qe6 11.d4 Bb7 12.0–0 0–0–0 13.d5 Qf5 14.Nd4 Qe5 15.Bg4 e6 16.Bf8 Rf8 17.de6 Kb8 18.ef7 Qe4?? 19.Bf3 Qf4 20.fg8Q Rhg8 21.Bb7 Qd6 22.Bd5 Rh8 23.Nc6 Ka8 24.Na7! Kb8 25.Nc6 Kc8 26.Qg4 Kb7 27.Ne5 Ka7 28.c5! Qd5 29.Qa4 Kb8 30.Nc6 Kc8 31.Ne7 Kd7 32.Nd5 (32...g6 33.Rfe1 Rf7 34.c6 Kd6 35.Qb4 Kd5 36.Rad1#) 1–0. mtra – mrbean, Internet, 2002.

2.e4 d6 3.d4 g6 4.Bc4 Bg7 5.Nc3 c6 6.Qf3 e6 7.Qe3 Ne7 8.Be2 Ba6 9.Nf3 0–0 10.0–0 c5 11.b5 cd4 12.Nd4 Bb7 13.a4 Nd7 14.f4 Rc8 15.Bd2 e5 16.fe5 Ne5 17.Be1 Nc4 18.Qf2 d5 19.Nd5 Nd5–+ 20.ed5 Qd5 21.c3= Ne3?? 22.Bf3+– Qd7 23.Qe3 Rce8 24.Qd3 Bc8 25.Bc6 Qd6 26.Be8 Re8 27.Bg3 Bf5 28.Rf5 (28...Qd7 29.Rf4+–) 1–0. mtrold1 – opponent, internet, 2001.

2.e4 Nf6 3.Nc3 e6 4.Nf3 Bb7 5.Bc4 c5 6.a3 a5 (better is 6...Ne4!? 7.0–0 cb4 (7...Ng5 8.Ne5 Nc6 9.Nc6 dc6) 8.ab4 Bb4 9.Ne4 Be4–/+) 7.bc5+/– Qc8 (7...Ne4 8.cb6 Qb6 9.0–0+= Nc3) 8.e5 (8.Qe2 Bc5 9.d4 Be7+/–) 8...Ng4? (better is 8...Qc5!? 9.Qe2 Bf3 10.gf3 Nd5+/–) 9.d4+– Nf2?? (better is 9...Nc6 10.Nb5 bc5+–) 10.Kf2 bc5 11.Be3 cd4 12.Bd4?? Qc4+= 13.Qe1?? Nc6 14.Nd2?? Qd4–+ 15.Qe3 Qe3 16.Ke3 Ne5 17.Ke2 Ba6 18.Ke1 Rb8 19.g3 Be7 20.Nce4 0–0 21.h3 Rb2 22.Rc1 Bb7 23.h4 Nf3! 24.Kd1 Nd2 25.Kd2 Be4 26.Rhe1 Bc2! 27.Rc2 Rc2 28.Kc2 a4 29.Kb2 Rb8 30.Kc1 Ba3 31.Kc2 Rb2 32.Kc3 Rg2 33.Kd3 Bb4 34.Ra1 a3 35.Kc4 a2 36.Kb4 d5 37.Kb3 e5 38.Kc3 d4 39.Kd3 f5 40.Ra2 Ra2 41.Kc4 Rg2 42.Kd3 Rg3 43.Ke2 f4 44.Kd2 f3 45.Ke1 d3 46.Kf2 Rh3 47.Ke3 e4 48.Ke4 f2 (48...f2 49.h5 f1Q 50.Kd5 Rh5 51.Kc6 d2 52.Kd7 d1Q 53.Kc7 Rb5 54.Kc6 Qc4#) 0–1. polonaris – cubs_fan_1, ChessWorld.net, 2011.

2.e4 g5 3.Bb2 Nf6 4.e5 (4...Nd5 5.Bc4+/–) 1–0. marekt – stermolle, internet, 2001.

2.f3 a6 3.Nh3 (3.e4 e5 4.a3 Nf6=) 3...b5 4.a4 d6 5.ab5 Bh3 6.gh3 Qc8? (6...e5!? 7.e4 Qh4 8.Ke2 Nf6=) 7.Nc3 (7.e4 c6+–) 7...Qb7 8.e3 ab5 9.Ra8 Qa8 10.Bb5 Nc6 11.f4 Kd8? (better is 11...e6+/–) 12.Qf3+– Qa1?? (12...Kd7 13.Ne2 e5 14.fe5 de5 15.Qf7 Nge7+–) 13.Qc6 Qc1 14.Ke2 Qc2 15.Qd7 1–0. Fritz 11 – nn, 2011.

2.f3 Ba6 3.Nc3 Bc4 4.d3 a5? (better is 4...Ba6= 5.Nh3 Bb7 6.b5 Nf6 7.e4 e6 8.Nf4 e5 9.Nfe2 d5; 4...Be6 5.b5 g6 6.Nh3 Bg7 7.Bd2 a6 8.a4 Bh3 9.gh3 Nh6) 5.dc4+– ab4 6.Nb5 Ra5 7.Bf4 c6?? (better is 7...Na6 8.c3 e6+–) 8.Nc7 Qc7 9.Bc7 Na6 10.Bb6 Rb5 (10...Ra3+–) 11.cb5 (11.cb5 cb5 12.Qd5+–) 1–0. Fritz 11 – zet, internet, 2011.

2.f3 f5 3.e3 (3.Nc3 Nf6=) 3...Nf6 (3...e6 4.b5+=) 4.c4 (4.Nc3 Bb7+=) 4...d6 (4...e5 5.b5+=) 5.Bb2 (5.Nc3 a6=) 5...e5 6.d4 (6.Nc3 Be7=) 6...Qe7 (6...Be7 7.Ne2+=) 7.de5 (7.Kf2!?=) 7...de5+= 8.a3 (better is 8.b5+=) 8...g5 (8...a5 9.Nd2 Nbd7+=) 9.g4?? (better is 9.Nc3 Bb7 10.Nge2+=) 9...Ne4?? (better is 9...fg4 10.Nc3 Bb7–/+) 10.c5 (better is 10.fe4 fg4 11.Nc3+–) 10...bc5?? (better is 10...Nf6 11.Nc3 Bg7+/–) 11.bc5. Margolin,Boris (2440) – Ivanchuk,Vassily (2760), Mainz FiNet op 6th, 2007.

2.f3 f6 3.Nc3 e5 4.a3 Bd6 5.e4+= Bb7 6.Bc4 c6 7.Nge2 b5 8.Ba2 a6 9.d4+= ed4 10.Qd4 Be5 11.Qd3 d6 12.f4+/– Bc3 13.Nc3 Qe7 14.0–0 Nd7 15.Bb2 0–0–0 16.a4+– Nh6 17.Bb3 Rhe8 18.Rfe1 g6 19.ab5 cb5? 20.Nd5 Qf7 21.Qc3 Kb8 22.Qc7 Ka8 23.Ra6!! Ba6 24.Ra1 Nb8 25.Nb6# 1–0. marre – oppo7, internet, 2010.

2.Nf3 a5 3.b5 (--> 1.b4 a5 2.b5 b6 3.Nf3).

2.Nf3 Ba6 3.Nc3 g6 4.b5 Bb7 5.e4 Bg7 6.d4 a6 7.ba6 Ba6 8.Ba6 Na6 9.0–0 Nb4 10.Bd2 e6 11.Nb5 Na2?? (better is 11...Na6+/–) 12.Qb1+– c6 (12...Nf6 13.Re1+–) 13.Nd6 (13.Ra2?! cb5 14.Ra8 Qa8 15.Qb5 Qe4 16.Qb6 f6+/– (16...Qc2 17.Qb8 Ke7 18.Bb4 d6 19.Bd6 Kf6 20.Qd8 Kf5 21.Qg5 Ke4 22.Re1 Qe2 23.Re2 Kd3 24.Qc5 Ke2 25.Qc2)) 13...Ke7 14.e5 (14.Ra2?! Kd6 15.Ra8 Qa8 16.Qb6 Ke7+–) 14...Bh6 15.Ra2 Ra2 16.Qa2 Bd2 17.Nd2 f6 (17...Kf8 18.Qb3+–) 18.N2e4 f5 (18...Kf8 19.f4 f5 20.Ng5+–) 19.Ng5 Nh6 (19...Qb8 20.Ngf7 Kf8 21.Nh8+–) 20.Qa3 c5 21.Qh3 Qf8 22.Qh4 cd4 23.Ngf7 g5 24.Qg5 1–0. Janek – Selam, internet, 2016.

2.Nf3 Nc6 3.b5 Na5 4.e3 a6 5.Bb2 ab5 6.Bb5 c6 7.Bd3 (7.Be2 d5= 8.0–0 Bg4 9.Ne5 Be2 10.Qe2 Nf6= 0.03) 7...Ba6 (7...d6 8.Ng5 (8.Be2= e5 9.Nc3 Nf6 10.0–0 Be7= –0.22) 8...e5 9.f4 Nf6 10.0–0 Qc7= 0.00) 8.Ba6+= Ra6 9.Qe2 (9.e4 e6+= (9...d5 10.ed5 Qd5+= 0.34) 10.Qe2 Qa8+= 0.31) 9...b5 (9...Qa8 10.c4= (10.0–0 b5+= 0.31) 10...Nf6+= 0.41) 10.a4+= Nc4 11.ab5 Ra5?? (better is 11...Ra1 12.Ba1 cb5+=) 12.Qc4+– cb5 13.Qb4 Ra1 14.Ba1 Qb6 15.Nc3 e6 16.Qb5 Qc7 17.Ne4 Qc2 18.Ne5 Qc1 19.Ke2 Nf6 20.Nf6 gf6 21.Qd7# 1–0. pierre – lionway, internet, 2008.

2.Nf3 f5 3.Bb2 e6 4.e3 Nf6 5.a3 Bb7 6.Be2 Be7 7.c4 a5 8.b5 0–0 9.d3 Qe8 10.Nbd2 Qg6 11.g3 d6 12.Nh4 Qh6 13.Bf3 Bf3 14.Qf3 Nbd7 15.Nb3 (15.d4 d5=) 15...Ng4+= 16.h3 (16.Ng2!?+=) 16...Nge5–/+ 17.Qe2 Bh4 18.gh4 a4 19.Be5 de5 20.Nd2 Qh4 21.0–0–0 Nc5 22.Rdg1? (better is 22.Nf3 Qh5 23.d4–/+) 22...Rad8–+ 23.Rg3 Nd3 24.Kc2 Qe7 (24...Rf7 25.Rhg1–+) 25.Rhg1 Rf7 26.Nb1? (26.e4 Nf4 27.Qe1–+) 26...Qc5 27.Kc3 e4 28.Qa2 Qe5 (better is 28...Ne5!? 29.Nd2–+) 29.Kc2 Nf2 30.Qb2 (30.R3g2 Nd3 (30...Nh3?! 31.Rh1–+) 31.Nc3 c6–+) 30...Nd3 (30...Qb2!? 31.Kb2 e5 32.Nc3–+) 31.Qe5 Ne5 32.Nd2 (32.h4 Rd3 33.Rd1 Rd1 34.Kd1 Rd7 35.Kc2 Rd3–+) 32...Rd3 33.R1g2 Ra3 34.Kb2 Rd3 35.Kc2 Rfd7 0–1. Barra,Horacio – Guimaraes,Rui, POR–ch sf Faro, 1998. (=1.Nf3 b6 2.b4)

2.f4 c5 3.Nf3 (3.bc5 bc5 4.Nf3 Nf6=) 3...Bb7 (3...cb4 4.Bb2=+) 4.Nc3 (4.bc5 bc5 5.Nc3 Bf3 6.ef3 e6=) 4...e6 (4...cb4 5.Nb5–/+) 5.b5 (5.bc5 Bc5 6.e3 Nf6=) 5...a5 (5...d5 6.e3=+) 6.e4 d5 7.ed5 ed5 8.Bd3 (8.d4 Nf6=) 8...Nf6 (8...Bd6 9.0–0=+) 9.0–0= d4 (9...Be7 10.Ne5=) 10.Ne4 Be7 (10...Ne4 11.Be4 Be4 12.Re1=) 11.Nf6+= Bf6 12.Qe1 (12.Re1 Kf8+=) 12...Kf8 (12...Qe7 13.Bb2=) 13.Bb2 Nd7 (13...g6 14.Be4 Ra7 15.Bb7 Rb7 16.c3=) 14.Bc4 Qc7 (14...Qe7 15.Qg3 Bf3 16.Rf3+= (worse 16.gf3 Bh4 17.Qh3 Rd8=+)) 15.Qg3 h5 16.Rae1 h4 17.Qg4 (17.Qh3 Bf3 18.Qf3 Rd8+–) 17...Rh6? (better 17...h3 18.g3 Bc8+–) 18.Ng5+– (18.Ng5 d3 19.c3+–) 1–0. Leonco – Nammam, internet corr, 2018.

2.g4 Bb7 3.f3? Nf6 4.Bg2 g5 5.d4 d5 6.e4 de4= 7.fe4 Be4–/+ 8.Be4 Ne4 9.Nf3 Nc6 10.Bb2 Nb4 11.c3 Nd5–+ 12.Ne5 f6?? 13.Nd2 fe5 14.Ne4–/+ ed4 15.cd4 h6 16.Ng3 Rh7 17.Qf3? e6 18.Qe4 Rd7 19.Qg6 Rf7–+ 20.Nh5 Qe7 21.Rf1?? Nf4 22.Qe4? Rd8 23.Qc6 Qd7 24.Qd7 Kd7 (25.Nf4 Bb4 26.Ke2 gf4–+) 0–1. clemyp (1625) – ashipham, net–chess.com, 2004.

2.Nh3 Bb7 3.Bb2 Nf6 4.f3 e6 5.b5 Bd6 6.e4 Be7 7.e5 Nd5?? (better 7...Ng8=) 8.c4+– Nb4 9.a3 0–0 10.ab4 Bb4 11.Qb3 Bc5 (11...Qe7 12.Nf4+–) 12.d4 Be7 13.Bd3 c6 14.0–0 cb5 15.cb5 a5 16.Qc2 g6 17.Rc1 d5 18.Nc3 Bb4 19.Qd2 (19.Na4 Nd7+–) 19...Qh4 20.Qe3 Nd7 (20...Rc8 21.Na2 Bf8 22.Rc8 Bc8 23.Nc3+–) 21.Na2 Be7 22.Rc7 Bc8 23.Rac1 h6 (23...Kg7 24.R1c2+–) 24.Bc3 (24.R1c2 Rd8+–) 24...Bg5 (24...Qh5 25.Bd2 Qh4 26.R1c6+–) 25.f4 Bd8 (25...Be7 26.Be1 Qh5+–) 26.Be1 Qg4 27.Nf2 Qh5 28.Be2 Qf5 (28...Qh4 29.Rc8 Rc8 30.Rc8+–) 29.g4 Qe4 (29...Bc7 30.gf5 Ra7 31.Rc3+–) 30.Ne4 de4 (30...Bc7 31.Rc7 de4 32.Qe4+–) 31.Rc8 Rc8 32.Rc8 Be7 33.Rc7 Rd8 34.Qe4 Bf8 35.Qc6 Ne5 36.fe5 Ba3 37.Bc4 Rf8 38.Be6! Kg7 (38...fe6 39.Qd7 Mate attack) 39.Bf7! Rf7 (39...Rf7 40.Qf6 Mate attack) 40.Qf6 Kg8 41.Qf7 (41.Qf7 Kh8 42.Qg7) 1–0. Adlai – Gestpa, internet, 2021.

2.Ba3 Bb7

3.b5 d6 4.c4 e5 5.d4 Nd7 6.de5 Ne5 7.Nf3 Nc4 8.e3 Na3 9.Na3 Nf6 10.Bc4?? (10.Bd3 d5 11.Nc2 a6–/+) 10...Be7 (10...d5 11.Qa4 Ba3 12.Qa3 dc4 13.Rd1–+) 11.0–0?? (11.Bd3 0–0–/+) 11...0–0 (better is 11...d5–+) 12.Qb3 d5 13.Bd3 c6 14.bc6 Bc6 15.Nd4 Ba3 16.Qa3 Bb7 17.Rac1 a5 18.Nc6 Bc6 19.Rc6 Ne4 20.Be4 de4 21.Rfc1 Qd3 22.Qd3 ed3 23.Rd6 Rfd8 24.Rb6 d2 25.Rd1 Rac8 26.Rb2?? (better is 26.Kf1 Rc2 27.a4=) 26...Rc1–+ 27.Rb1 Rb1 28.Rb1 d1Q (28...d1Q 29.Rd1 Rd1) 0–1. iczker – xxdarek1989xx, kurnik, 2011.

3.b5 e6 4.Bf8 Kf8 5.c4 d5 6.Nc3 d4 7.Na4 Nf6 8.d3 e5 9.Nf3 Nbd7 10.e4 de3 11.fe3 c5 12.bc6 Bc6 13.Be2? (13.Nc3 Kg8=) 13...g6?? (better is 13...Ng4!? 14.Qb3 Ne3–+) 14.0–0 Kg7 15.d4 (15.Nc3 Re8=) 15...e4 (better is 15...Ng4 16.d5 Ba4 17.Qa4 Ne3–/+) 16.Ng5 h6 17.Nh3 Re8 18.d5 Ba4 19.Qa4 Nc5 20.Qc6 Rc8 21.Qb5 Qd7 22.Qd7 Ncd7 23.Nf4 Ne5 The backward pawn on c4 becomes a target 24.Rfc1 Rc5 25.a4 Rec8 26.a5 Nc4 27.Bc4 Rc4 28.Rc4 Rc4 29.ab6 ab6 30.Ra7? (better is 30.d6!?–/+) 30...Ng4 31.Ne6?? (31.Ra1–+) 31...Kf6 32.h3 Rc1# 0–1. iczker – gigibalamuc (1645), kurnik, 2011.

3.b5 g6 4.Bb2 Nf6 5.Nf3 Bg7 6.g3 Nh5 (6...a6!?=+) 7.Bg7= Ng7 8.Bg2 0–0 9.0–0 d5 10.d3 Nd7 11.Nbd2 e5 12.a4 f5 13.e3 c5 14.bc6 Bc6 15.c4 Nc5?? The isolani on a4 becomes a target (15...Rc8 16.a5=) 16.cd5 (better 16.Ne5 Bb7 17.d4+–) 16...Bd5 17.e4 fe4 18.de4 Be4 (better 18...Ne4 19.Ne4 Be4 20.Ne5 Bg2 21.Kg2 Ne6=) 19.Qc1?? (better 19.Ne4!? Qd1 20.Rad1 Ne4 21.Ne5+=) 19...Bd3 (better 19...Bf3 20.Nf3 Qf6–/+) 20.Qc3?? (better 20.Ne5 Rc8 21.Nd3 Qd3 22.Qc4 Qc4 23.Nc4=) 20...e4–+ 21.Rfe1 (21.Ne5 Bf1 22.Rf1–+) 21...Re8 (better 21...ef3 22.Nf3 Qf6 23.Qf6 Rf6–+) 22.Nd4 The pressure on the isolated pawn grows (22.Ne5 Rc8 23.Ne4 Ne4 24.Qb3 Ne6 25.Be4 Be4 26.Re4 Qd2+=) 22...Qd7 23.Nb5 (better 23.N4b3!? Na4 24.Qb4=) 23...Rad8–+ 24.Rad1 a6?? (24...Bb5 25.ab5 Qb5–/+) 25.Na3?? (better 25.Ne4 Kh8 26.Nbd6 Ne4 27.Ne4+=) 25...Qd4 (25...Na4?! 26.Qb3 Kh8 27.Ne4=; 25...Qa4?! 26.Ndc4–+) 26.Qc1 (better 26.Qd4 Rd4 27.a5 ba5 28.Rc1–+) 26...Na4?? (26...Rf8 27.Re3 Qa4 28.Qa1–+) 27.Ndc4?? (better 27.Ne4 Kh8 28.Bf1–/+) 27...Nb2 (better 27...Rc8–+) 28.Rd2?? (better 28.Nb2 Qc5 29.Nd3 Rd3 30.Nc2+–) 28...Nc4–+ 29.Nc4 Qc4 (29...Bc4?! 30.Rd4 Rd4 31.Qb2=) 30.Qc4 Bc4 31.Rd8 Rd8 32.Be4 Rd2 33.Kg2 Ne6 34.Bb7 (34.Rc1 b5–+) 34...Kf7 (better 34...a5 35.Kf3–+) 35.Ba6 (35.Rc1 Rd4 36.Rb1–+) 35...Kf6 (better 35...Ba6 36.Rc1 Bb7 37.Kf1 Bf3–+) 36.Bc4= Rd6 0–1. alessandrocarvalhaes (1840) – rain24 (1885), lichess.org, 2020.

3.c4 d6 4.Nf3 Nd7 5.Bb2 c6 6.d4 Qc7 7.e4 e6 8.Bd3 Be7 (8...d5 9.a3=) 9.0–0+= f6 (9...Ngf6 10.Nc3+=) 10.a4 g5 (10...c5 11.bc5 bc5 12.d5+/–) 11.Nc3 h5 (11...d5 12.ed5 ed5 13.Re1+/–) 12.g3 (12.d5!?+–) 12...h4 13.e5 (13.d5!?+/–) 13...hg3 14.Bg6 Kd8 15.fg3 f5 (15...g4 16.ef6 Bf6= (worse is 16...gf3 17.fe7 Ne7 18.Be4+/–; 16...Ngf6? 17.Ng5 Kc8 18.Ne6+–)) 16.ed6+= Bd6? (better is 16...Qd6 17.c5 Qc7+/–) 17.Ne5?? (17.Ng5 Kc8 18.Nf7 Rh3+–) 17...Ne5?? (17...Be5 18.de5 c5 (worse is 18...Qe5 19.Qd2 Qg7 20.Ne2+/–) 19.Bf5 ef5+=) 18.de5+– Ne7?? (18...Rh6 19.Bh5 g4 20.Bg4 Qd7 21.ed6 Qh7+–) 19.ed6 (19.ed6 Qd7 20.de7 Ke7 21.Qe2+–; 19.Qd6?! Qd6 20.ed6 Ng6+/–) 1–0. bratek55 – tadekk70, kurnik, 2011.

3.Nf3 e5 4.b5 Ba3=+ 5.Na3 e4 6.Nd4 Qf6 7.e3= c5 8.bc6 dc6 9.Qg4 c5 10.Ndb5?? Qa1–+ 11.Ke2 Na6 12.Nd6 Kf8 13.Qd7 Bd5 14.Ne4 Nf6 (15.Nf6 Qf6 (15...gf6?! 16.Qd6 Ke8 17.Qd5=+) 16.Qd5 Rd8–+; better is 14...Be4 15.f3 Qa2 16.fe4 Qa3–+) 0–1. pinecrest1981 – Enrique, Live Game Caissa's Web, 2005.

2.a4 g6

3.a5 Nc6 4.c3 ba5= 5.ba5 Na5?? 6.Bb2?? Rb8 7.Qc2 Nb3 8.Ra7= Bh6 9.e3 Nf6 10.Bc4 Bb7?? 11.Bb3?? Bg2–+ 12.f3 Bh1 13.Kf2 Nd5! 14.Bd5 g5?? 15.c4+/– g4?? 16.Bh8+– c6 (17.Bf7 Kf8 18.Qh7 e6 19.Qh6 Kf7 20.Qg7 Ke8 21.Qg6 Kf8 22.Bg7 Ke7 23.Qf6 Kd6 24.c5 Kc5 25.Qd4 Kb5 26.Nc3). arifagam – kwilson, net–chess.com, 2002.

3.a5 Bg7 4.c3=.

3.Bb2= Nf6 4.e4 Bg7 5.e5 Nd5 6.Qf3 Bb7 7.e6 f6 8.c4? Nb4–/+ 9.Qb7 N8c6–+ 10.ed7 Kd7 11.Na3 Rb8 12.Qb8 Qb8 13.d4 Rd8 (13...e5!? 14.d5 Nd4 15.Rd1–+) 14.Nf3 Ke8 15.d5 Ne5 16.Ne5 fe5 17.Bc3 a5 18.Rb1 Qa8 19.Bb4 ab4 20.Nb5 Qa4 21.Nc7 Kd7 22.Nb5 e4 23.Be2 Bc3 24.Kf1 Qc2 25.Rd1 Rf8 26.h3 e3 27.f3 b3 28.Na3 Qa2 29.Nb5 b2 30.Nc3–/+ Qb3 31.Nb1 Ra8 32.f4? Ra1?? 33.Bg4–/+ Kd6 34.Ke2 Qc2?? 35.Ke3+= Rb1?? 36.Rb1+– Qc4 37.Bf3 Qc3 38.Kf2 Qd2 39.Kg3 h5? 40.Rhe1 b5 41.Re6 1–0. market (2195) – nrike (1735), GameColony.com, 2002.

3.f4 e6 4.g4?? Bg7 5.Ra2?? Nf6 6.h4 Ng4 7.c3 Bb7 8.Nh3?? Bh1 9.c4 Qh4 10.Nf2 Nf2 11.Qc2 Be4 12.d3 Nd3 13.Kd2 Qf4 14.e3 Qf2 15.Kd1 Qe1# 0–1. pimpstud – Arcas, Live Game Caissa's Web, 2005.

3.f4 Bg7 4.Nc3 d5 =+.

2.Bb2 Na6

3.a3 Bb7 4.e3 d6 5.Qh5 Qd7 6.h3 0–0–0 (better is 6...c5=) 7.Qf3?? (better is 7.Qf7 Nh6 8.Qc4+/–) 7...Bf3–+ 8.Nf3 Qc6 (better is 8...Nb8 9.a4–+) 9.b5?? (9.Ba6 Kb8 10.Nc3–+) 9...Qc2 10.Bc3 Qc1 11.Ke2 Nc5 12.a4 Ne4 13.Bd4 Qd2 14.Nfd2 Nd2 15.Nd2 e5 16.Bc3 Be7 17.a5 h5 18.ab6 Rh6?? 19.ba7 Kd7 20.a8Q Ra8 21.Ra8 Nf6 22.Ra7 Bd8 23.b6 Nd5 24.b7 Nb6 25.b8Q Nc8 26.Qb5 Ke6 27.Ra8 Kf5 28.Rc8 1–0. nakpim – kasparow10, kurnik, 2012.

3.b5 Rb8?? 4.ba6+– Ba6 5.e4 Bf1 1–0. GuestPDRZ – ELIASMASTER, freechess.org, 2019.

3.b5 Nc5 4.e3 d6 5.Nf3 Bb7 6.c4 (6.d4 Ne4+=) 6...e5= 7.a4 (7.Be2 e4 8.Nd4 a6=) 7...Be7 (7...a6 8.d4 ed4 9.Bd4= (worse 9.Qd4 Nb3 10.Qd1 Na1–+; 9.Nd4?! Nf6=; 9.ed4?! Qe7 10.Be2 Bf3 11.gf3 Nd7=)) 8.Be2 Bf6 9.0–0 (9.d4 e4 10.Nfd2 Nd3 11.Bd3 ed3+–) 9...Ne7 (9...Bf3 A) worse 10.Bf3 e4 11.Bf6 Qf6–/+ (11...Nf6?! 12.Be2=); B) 10.gf3 a6 11.Nc3=) 10.d4+= ed4 11.Bd4 Nf5 12.Bf6 (12.a5 ba5 13.Ra5 c6+=) 12...Qf6= 13.Nbd2 0–0 14.a5 a6 (14...ba5 15.Ra5 a6 16.Nb3 Nb3 17.Qb3 ab5 18.Ra8 Ra8 19.cb5=) 15.ab6 ab5 (15...cb6 16.ba6 Ba6 17.Rb1=) 16.Ra8 Ra8 17.bc7 Rc8 (17...bc4 18.Nc4 Rc8 19.Nd4 Rc7 20.Nf5 Qf5 21.Nd6+–) 18.cb5+– Ne7 (18...Rc7 19.Qa1 Qe7 20.Rb1+–) 19.b6 (better 19.Qa1 Qa1 20.Ra1 Rc7 21.b6+–) 19...Nd5+= 20.Nc4 Nc3 21.Qc2 d5 22.Na5 (22.Na3 Ne2 23.Qe2 Qb6+=) 22...Ne2= 23.Qe2 Ba6 24.Qb2?? (better 24.Qc2 Qb6 25.Ra1=) 24...Bf1 (better 24...Qb2 25.Re1 Qb6–+) 25.Qf6+– gf6 26.Kf1 Kf8 27.Nd4 (better 27.b7 Nb7 28.Nb7+–) 27...Ke7?? (better 27...Nd7 28.b7 Rc7+–) 28.Nb5 (better 28.Nac6 Kd6 29.Na7 Re8+–) 28...Kd7 29.b7 Nb7 30.Nb7 Kc6 31.N7d6 Rc7 32.Nc7 Kc7 (32...Kd6 33.Nb5 Kc5 34.Nd4+–) 33.Nf7 (33.Ne8 Kc6+–) 33...Kc6 (33...Kd7 34.g4+–) 34.Ke2 Kd7 35.Kd3 Ke7 (35...Ke6 36.Nh6 Ke5 37.f4 Ke6 38.Kd4+–) 36.Nh6 Ke6 37.Kd4 Kd6 38.f4 Ke6 39.g4 Kd6 40.Nf5 (40.f5 Kc7+–) 40...Ke6 41.h4 h5 (41...Kd7 42.Nh6 Ke8 43.Kd5+–) 42.Ng7 (42.Ng7 Kd7 43.Nh5+–) 1–0. RichardSommer (2065) – Mr1_Bens (2045), lichess.org, 2020.

3.b5 d5 4.ba6 Ba6 5.d4 c6 6.Nf3 Rc8 7.g3 h5 8.h4 Nf6 9.Bg2 g6 10.0–0 Kd7 11.Ne5 Kd6 12.Nf7 Ke6 13.Nd8 Kd6 14.Nf7 1–0. winner2002 (1915) – justynamisiek, kurnik, 2012.

2.Bb2 b5

3.a4 ba4 4.Nc3 Bb7 5.Ra4 a6 (5...Nf6 6.Nf3) 6.b5 (6.e4 e6) 6...e6 7.Qa1 f6 (7...Nf6 8.e4 Qc8 9.e5) 8.e3 Bd6 9.Nf3 Ne7 (9...Qc8!?) 10.ba6+/– Bc6 11.Bb5 Bb5 (11...Bf3 12.gf3 c6 13.Bc4+–) 12.Nb5+– 0–0 13.Nd6 cd6 14.0–0 Nec6? (better is 14...Qc7+–) 15.a7 Na7 16.Ra7 Ra7 17.Qa7 Nc6 18.Qa3 Qc7 19.Ra1 Qd8 (19...Ne5 20.Be5 fe5 21.d3+–) 20.Qd6 Rf7 21.Ra6 Qc8 22.Qa3 h6 23.Ra8 Nb8 24.Nh4 Qc2 25.Rb8 Kh7 26.g3 Qb1 27.Kg2 Qe4 28.Nf3 Qg6 29.Bc3 d5 30.Qa8 Qe4 31.Rh8 Kg6 32.Qb8 Kf5 33.Qf4 Qf4 34.gf4 Ke4 35.Re8 g5 36.Re6 Kd3 37.Rf6 Rh7 38.fg5 (38...hg5 39.Rd6+–) 1–0. tightfist – tmitchell, net–chess.com, 2006.

3.e3 a6 4.a3 c6 5.Nf3 Bb7 6.c4 Qc7 (6...Nf6 7.Be2+=) 7.cb5 (7.Be2 bc4 8.Bc4 e6+=) 7...ab5+= 8.Be2 Na6 9.0–0 Nb8 (9...Nf6 10.Qc2+=) 10.d4 Na6 11.Nbd2 c5? (better 11...Nf6+–) 12.dc5+– d6? (12...Bc6+–) 13.cd6 ed6 14.Nd4 Be7 (14...Nb8 15.Bb5 Nd7 16.Qh5+–) 15.Bf3 (15.Nb5!? Qc6 16.Ne4 Kf8+–) 15...Nf6 16.Rc1 (16.Nb5 Qd7 17.Bf6 gf6+–) 16...Bf3?! (16...Qd7 17.Nf5 0–0 18.Ne7 Qe7 19.Bf6 gf6 20.Bb7 Qb7 21.Qg4 Kh8 22.Qd4+–) 17.N2f3 (better 17.Qf3 Qb8 18.Qc6 Kf8 19.Nb5+–) 17...0–0 (17...Qd7+–) 18.Rc7 Nc7 19.Nf5 Ne6 (19...Bd8+–) 20.Ne7 Kh8 21.Bf6 (21.Bf6 Ra3 22.Bh4+–) 1–0. BeepBeepImAJeep (2575) – birra2016, lichess.org, 2016.

3.e3 Ba6 4.Nf3 (4.a4 c6+–) 4...d6 (4...e6 5.a4+=) 5.Be2 (5.a4 ba4 6.Ba6 Na6 7.Ra4 Nb8+–) 5...Kd7 (5...c6!?+–) 6.0–0 (6.a4 c6+–) 6...Nc6 (6...c6 7.a4+–) 7.a4 (better 7.c3+–) 7...Qb8? (better 7...Nb4 8.c3 Nd5+–) 8.ab5 Qb5 (8...Bb5 9.c4 Bc4 10.Bc4 Qb4+–) 9.Bb5 Bb5 10.d3 Nb4 11.c4 (better 11.Nd4 Bc6 12.c3 e5 13.cb4 ed4+–) 11...Ba6 (11...Bc6+–) 12.Qa4 c6 13.Qb4 Rb8 (13...Bc8+–) 14.Qb8 Bb7 15.Qb7 Ke8 (15...Kd8 16.Ra7 e5 17.Qd7) 16.Ra7 (16.Qc8) 16...Kd8 (16...f6 17.Qc6 Kf7 18.Qd5 Kg6 19.g4 h6 20.Nh4 Kh7 21.Qf5 g6 22.Qg6) 17.Ra8 (17.Qd7) 1–0. GuestXBCD – GuestTJFF, freechess.org, 2016.

2.Bb2 Nh6

3.c4 e6 4.a3 Nf5 5.e4 Nd6 6.d3 Qg5 7.Nf3 Qg4 8.h3 Qf4? (Better is 8...Qg6+/–) 9.Bc1 Qf6 10.e5 Qf5 (10...Qd8 11.ed6 Bd6+–) 11.g4 (11.ed6?! Bd6 12.d4 Bb7+–) 11...Qg6 (11...Qf3 12.Qf3 Bb7+–) 12.Nh4 (12...Bb7 13.Ng6 (13.ed6 Qf6 14.dc7 Qa1 15.cb8Q Rb8–/+) 13...fg6 14.Rg1+–) 1–0. Wall,Bill – LostRook, Microsoft Gaming Zone, 2004.

3.Nf3 f6 4.g3 Bb7 5.Bg2 Bf3 6.Bf3 d5 7.c4 c6 8.cd5 cd5 9.Nc3 e6 10.a3 Be7 11.Bh5 g6 12.Bf3 0–0 13.0–0 Nc6 14.d3 Nd4 15.Bg2 Ndf5 16.e4 de4 17.Ne4 Rc8 18.d4 Nd6 19.Nd6 Qd6 20.Re1 Rcd8 21.Qb3 Kg7 22.Re6 Qd7 23.Rae1 Rfe8 24.Bc6 Qc7 25.Be8 Re8 26.d5 Nf5 27.Bf6 Bf6 28.Re8 Nd4 29.Qe3 Qd6 30.Qe4 Nf5 31.Ra8 a5 32.Qe8 Kh6 33.ba5 ba5 34.Ra5 Bc3 35.Re6 Qc7 36.Ra8 Qc5 37.Qf8 Qf8 38.Rf8 Nd4 39.Ree8 Bb2 40.a4 Ba3 41.Rf7 1–0. rryy44 – oberek222, kurnik, 2012.

2.b5 c5

3.Bb2 a6 4.e3 d6 5.Nc3 ab5 6.Qf3 Ra7 7.Bb5 Bd7 8.Nge2 Nf6 9.a4 Bb5 10.Nb5 Rd7 11.Bf6 ef6 12.c4 d5 13.cd5 Rd5?? 14.Qd5!!+– Qd5 15.Nc7 Kd7 16.Nd5 Kc6 17.Nec3 h5 18.a5 ba5 19.Ra5 Nd7 20.0–0 Bd6 21.Ra6 Kb7 22.Rd6 (22...Rb8 23.Rd7 Kc6 24.Rf7+–) 1–0. Tiedemann,Joern (1810) – Gonzalez E,Patricio E, RSS4E easy–20, 2005.

3.Bb2 d5 4.e3 Nd7 5.f4 Bb7 6.Nf3 Ngf6 7.Be2 e6 8.0–0 Be7 9.a4 0–0 10.Ne5 Ne4 11.d3 Nd6 12.Bf3 Bf6 13.d4 c4 14.g4 Rc8 15.g5 Bg5 16.fg5 Qg5 17.Bg2 Ne5 18.de5 d4 19.Qe2 d3 20.cd3 cd3 21.Qf2 Rc2 22.Nd2 Ne4 23.Ne4 Be4 24.Qc2 dc2 25.Rf2 Qe3 26.Raf1 Bg2 27.Kg2 Qb3 28.Bc1 Qa4 29.Rd2 Qe4 0–1. jura1946 – varin123, kurnik, 2012.

3.c4 Bb7 4.e3 a6 5.Bb2 ab5 6.cb5 e6 7.Nf3 Nf6 8.Be2 Be7 9.0–0 d6 10.a4 Nbd7 11.Na3 0–0 12.d4 Qb8 13.h3 Rd8 14.Nc4 Be4 15.Ncd2 Bd5=+ 16.Re1 Qb7 17.Bc4 Bc4 18.Nc4 Ne4 19.Nfd2 Nd2 20.Nd2 Bf6 21.Nf3 c4 22.Qc2 d5 23.g4 g5 24.Kg2 Kg7 25.Bc3 Qc7 26.e4 h6 27.e5 Be7 28.Re2 Rh8 29.Ng1 Qb7 30.f3 Nf8 31.Rf2 Ng6 32.Ne2 Rh7 33.f4= gf4 34.Nf4 Nf4 35.Rf4 Bg5 36.Rf3 Kh8 37.Raf1 Rg7 38.Kg3 Qe7 39.Kf2 Kg8 40.Ke2 Qd8 41.Kd1 ½–½. Rongen – Bottema, Dieren, 1994.

3.bc6 Nc6 4.Bb2 Nf6 5.g3 g6 6.Bg2 Bg7 7.e3 0–0 8.d4 d5 9.Nf3 Ba6 10.Nbd2 Rc8 11.Rc1 Nb4 12.a3 Na2 13.Rb1 Nc3 14.Bc3 Rc3 15.Rb3 Qc8 16.Rc3 Qc3 17.Qb1 Ne4 18.Qb3 Qa1 (18...Qa1 19.Qb1 Qa3 20.Ne4 de4–+) 0–1. captainevans – milano56, kurnik, 2012.

2.b5 d6

3.Bb2 Qd7 4.e3 Bb7 5.Nf3 g6 6.Bh8 f6 7.Nc3 h6 8.Bd3 e5 9.Bg6 Kd8 10.Qe2 Qg7 11.Bg7 Bg7 12.0–0 Nd7 13.Be4 Be4 14.Ne4 d5 15.Nc3 Kc8 16.Nd5 Kb7 17.Qc4 Nc5 18.d4 ed4 19.ed4 f5 20.dc5 Ba1 21.c6 Kc8 22.Ra1 a6 23.Nf4 Ne7 24.Qe6 Kd8 1–0. chybol3 – tazok, kurnik, 2012.

3.Bb2 Qd7 4.e4 Bb7 5.Nf3 c6 (5...Be4!? 6.Nc3 Bb7+=) 6.a4 Nf6 7.e5 Nd5 8.ed6 Qd6 9.Bd3 (9.Nc3 Qe6 10.Ne2 Qe4=) 9...e6 (better is 9...Nf4!?–/+) 10.Be5 Qd7 11.0–0 f6 12.Bg3 Bd6 13.Re1 0–0 14.Nd4 e5 (14...Bg3 15.hg3 (worse is 15.fg3 Nf4 16.Nf3 Nd3 17.cd3 cb5–/+) 15...Nc7 16.Qh5=) 15.Nf5 (15.Bf5!? Qe8 16.Qf3+=) 15...a6= 16.Qh5 (16.Nc3!? Nc3 17.dc3=) 16...g6–/+ 17.Nh6 Kg7 18.Qh4 (18.bc6!? Bc6 19.Qh4–/+) 18...ab5–+ 19.Nc3 (19.Re4–+) 19...Nc3 20.dc3 Na6 21.ab5–/+ Nc5 22.Bc4 cb5–/+ 23.Be2 Ne4 24.Bg4 f5 25.Bh3? Nc3 26.Be5?? Be5 27.Re5 Ra1 28.Re1 Re1# 0–1. poganinbezdom (1660) – delugens (1630), kurnik, 2011.

3.Bb2 Nf6 4.a4 g6 5.e3 Bg7 6.Nf3 e6 7.Be2 Qe7 8.0–0 Bb7 9.c4 Nbd7 10.Nc3 h5 11.Qc2 Nh7 12.Bd3 g5 13.Bh7 g4 14.Nd4 Bd4 15.ed4 0–0–0 16.d5 f5 17.de6 Ne5 18.Nd5 Qh7 19.e7 Rde8 20.Nf6 Qe7 21.Ne8 Qe8 22.Rfe1 Qg6 23.d4 Nd7 24.d5 Rf8 25.Re6 Qg5 26.Rae1 Kb8 27.Bc1 Qd8 28.Bf4 Nc5 29.g3 Ne6 30.de6 Re8 31.Qd3 h4 32.Qd4 hg3 33.fg3 Qe7 34.Qe3 Qh7 35.e7 Bc8 36.Bg5 Qg6 37.Qf4 Bd7 38.Bh4 Rh8 39.Kg2 Rh4 40.gh4 Be8 41.Qg5 Qf7 42.Rf1 Qc4 43.Rf5 Qc2 44.Rf2 Qa4 45.Kg3 Qb3 46.Kg4 Qc4 47.Rf4 Qe2 48.Kf5 Qb5 49.Kf6 Qd7 0–1. chybol3 – tazok, kurnik, 2012.

2.c3 Nc6

3.Bb2 Bb7 4.e3 a6 5.d4 Qb8 (5...e5 6.d5 Nce7 7.c4=) 6.Nf3 Nd8 (6...Nf6 7.Bd3+=) 7.Be2 (7.Bd3 Nf6+=) 7...Bf3 (7...Nf6 8.0–0+=) 8.Bf3+/– Ra7 (8...c6 9.0–0+/–) 9.Nd2 Nb7 10.0–0 Nd6 (10...e6 11.a3+/–) 11.a4 e6 12.Qe2 Be7 13.Rfd1 Nf6 14.Rac1 0–0 15.g3 Nfe8 16.Bg2 c5 17.dc5+/– bc5 18.bc5 Nb5?? 19.ab5+– ab5 20.Rb1 Rc7 21.Nb3 Qc8 22.Qc2 e5 23.Ra1 Bc5 24.Nc5 Rc5 25.Qe2 Rc7 26.Rdc1 Nf6 27.Rab1 Rd8 28.c4 bc4 29.Rc4 Rc4–/+ 30.Qc4?? Qc4–+ 31.Rc1 Qc1! 32.Bc1 Rc8 33.Bb2 Rc2 34.Bf1?? Rb2 35.Kg2 Ra2 36.Bd3 Rc2 37.Bc2–/+ d5 38.Bb1 Kf8 39.Kf1 Ke7 40.Ke2 Kd6 41.Kd1 Nd7 42.Kc2 f5 43.Kb2 e4 44.Ba2 Nf6 45.Bb1? h5 46.Bc2 g5 47.h4 g4 48.Bd1 Kc5 49.Bc2 Nd7 50.Bb1 Nb6 51.Ba2 Nc4 52.Bc4 dc4 53.Kc3 Kb5 (53...Kb5 54.Kd4 Kb4–+) 0–1. Fournier,Frederic (1920) – AbrojoElBarbaro (1785), Active, 2009.

3.a4 Ne5 4.b5 Bb7 5.d3 Ng4 6.f3 Ne5 7.d4 Nc4 8.e3 Nd6 9.e4 f6 10.d5 e6 11.c4 f5 12.e5 Nf7 13.de6 Ne5 14.ed7 Nd7 15.Bd3 Qf6 16.Qe2 Be7 17.Bb2 Qg6 18.Nh3 0–0–0 19.Nf4 Qd6 20.Bg7 Bf6 21.Bh8 Bh8 22.Ra2 Ngf6 23.Ne6 Re8 24.0–0 Re7 25.Bf5 Nh5 26.Rd2 Nf4 27.Qd1 Qe5 28.Nf4 Qf5 29.Nd3 Qf7 30.Re1 Bf6 31.Re7 Qe7 32.Re2 Qf7 33.Qc2 c6 34.Nb4 c5 35.Nc6 a6 36.Na7 Kc7 37.Qd3 Qg6 38.Qg6 hg6 39.Re6 Bd4 40.Kf1 Ne5 41.ba6 Ba6 42.Re7 Kd6 43.Re8 Nc4 44.Nb5 Bb5 45.ab5 Ne3 46.Kf2 Kd5 47.Kg3 Kc4 48.Na3 Kb4 49.Nb1 Kb5 50.Rg8 Be5 51.f4 Nf1 52.Kf2 Nh2 53.fe5 Ng4 54.Kg3 Ne5 55.Kf4 Nd3 56.Kf3 Ne1 57.Kf2 Nd3 58.Kg3 Ne5 59.Kf4 Nd3 60.Ke4 Nf2 61.Ke3 Ng4 62.Kf4 Nf6 63.Rg6 Nd5 64.Ke5 Ne3 65.g3 Nc4 66.Kd5 Ne3 67.Kd6 Nf5 68.Kc7 Kc4 69.g4 Ne3 70.Kb6 Nd5 71.Ka6 Nb4 72.Kb6 Nd3 73.g5 Nf4 74.Rg8 Nh5 75.g6 Kd5 76.g7 Kc4 0–1. martenkaa91 – ozi0610, kurnik, 2012. (=1.c3 b6 2.b4)

3.e4 e5+=.

2.c4 a6

3.Bb2 d6 4.a4 (4.d4 d5=) 4...e5 5.Nf3 g6 (5...Nf6 6.Nc3=) 6.e3 Bg7 7.Be2 Bb7 (7...Nf6 8.d4=) 8.0–0+= Nd7 9.Qb3 g5 (9...a5+=) 10.h3 (better is 10.d4!?+=) 10...h5+= 11.d4 (11.Ne1!?+=) 11...g4–/+ 12.Ne1 gh3 13.gh3 Qg5 (13...Qh4!? 14.Kh2 ed4+=) 14.Kh2= ed4 15.Rg1 (15.f4 Qe7 16.Bf3 Bf3 17.Nf3 Nh6 18.Nd4 Ng4 19.Kh1 Ne3+= (worse is 19...Qe3 20.Qe3 Ne3 21.Re1=)) 15...Qh6 16.Rg7 (better is 16.Nf3!?+=) 16...Qg7–+ 17.Bd4? (17.ed4 Ngf6–+) 17...f6 (better is 17...Ngf6 18.e4 c5 19.bc5 dc5–+) 18.Nd2 Ne7 19.Nef3 Nf5 20.Rg1–/+ Qf7 21.Bd3 Nd4 22.ed4 0–0–0 23.a5 h4 24.ab6+= cb6 25.Qa3 Qh5 26.b5 a5 27.Be4 d5+= 28.cd5 Bd5 29.Rc1 Kb7 30.Qd6 Nc5 31.Bd5 Qd5= 32.Qd5 Rd5 33.dc5 Rc5 34.Rb1 f5 35.Nd4 f4 36.N2f3 Re8 37.Rg1 Rc7 38.Rg4 Re4 39.Nf5 Rh7?? 40.Nd6+– Kc7 41.Ne4 Re7 42.Rf4 Re5 43.Nfg5 Rb5+– 44.Rf7 Kc6 45.Rf6 Kb7 46.Nd6 Ka6 47.Nb5 Kb5 48.Rf5 Kb4 49.Nf3 a4 50.Nh4 a3 (50...a3 51.Rf8 a2+–). blackiwhite (1740) – starzobek (1755), kurnik, 2011.

3.e3 e6 4.Bb2 Bb7 5.Nf3 Bf3 6.Qf3+= Nc6 7.a3 Nge7 8.Bd3 d5+= 9.Qg3 f6 10.f4 b5? 11.c5 Qb8 12.Nc3 g6 13.Nd1 Bg7+= 14.Nf2 a5= 15.Ng4 ab4 16.Nf6 Bf6 17.Bf6 Rg8 18.Qh4 Rf8 19.Be7 Ne7+= 20.Qh7 Ra3 21.Ra3 ba3+= 22.Bg6 Ng6 23.Qg6+/– Kd7 24.0–0 Qe8 25.Qd3+– c6 26.Qa3 Qb8 27.d4 Rg8 28.Ra1 Qb7 29.Qa7 Kc7 30.h3 Rg3 31.Kf2 Rg8 32.g4 Rh8 (33.Qb7 Kb7+–). bentengutama (2170) – beammeupscotty (2000), net–chess.com, 2003.

2.c4 Nf6

3.Bb2 e6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.c4).

3.Nc3 Bb7 4.c5 e6 5.d4 Nd5 (5...a5 6.b5–/+) 6.Bb2 (6.Nd5 Bd5 7.Nh3 Nc6+=) 6...Be7 (6...Nb4!? 7.a3 Nd5–/+) 7.a3 c6 (7...a5 8.b5+=) 8.Nb1 (8.Nf3!?+=) 8...bc5 9.bc5 Qa5 (9...0–0 10.e4 Nf4 11.g3=) 10.Qd2 Qd2 11.Nd2 Ba6 12.g3 0–0 13.e4 Nf6 14.Ba6 (14.Ngf3 Bf1 15.Kf1 Na6+=) 14...Na6 15.Ngf3 Rab8 16.Bc3 Nc7 17.0–0 Rb7 18.Ba5 Nb5 (18...Rfb8 19.Kg2+=) 19.Rfb1 (better is 19.a4 Nd4 20.Nd4 Bc5 21.N4f3+–) 19...a6?? (better is 19...Rfb8+=) 20.a4+– Nd4 (20...Ra8+–) 21.Rb7 (21.Nd4?! Rb1 22.Rb1 Bc5+–) 21...Nf3 22.Nf3 Bc5 (22...Ne4 23.Rd7 Bc5 24.Ra2+–) 23.e5 Ne4 24.Ra2 d5 25.Rc2 (25.ed6 Bd6 26.Rb6 Rc8+–) 25...h6 (25...Rc8 26.Kg2 Bf8 27.Nd4+–) 26.Rc7 g5 (26...f6 27.ef6 Rf6 28.Kg2+–) 27.Rc6 Be7 (27...g4 28.Ne1 Bd4 29.Bc7+–) 28.Ra6 Nc5 (28...Bc5 29.Kg2+–) 29.Ra7 Re8 (29...Nb3 30.Bb6 Bd8 31.Bd8 Rd8 32.Rcc7+–) 30.Re7! (30.Re7 Re7 31.Rc5+–) 1–0. eweram (2020) – dsteel (2145), net–chess.com, 2014. (=1.c4 b6 2.b4 Nf6)

3.Nf3 Bb7 4.d4 e6 5.a3 Be7 6.e3 d6 7.Bd3 h6 8.0–0 0–0 9.Nc3 Nbd7 10.Bb2 c5 11.e4 cd4 12.Nd4 Rc8 13.f4 d5 (13...a6!?+=) 14.cd5+– ed5 15.e5 Ne4 16.Rc1 (16.Be4 de4 17.Nf5 g6+–) 16...Nc3 (better is 16...a5!? 17.Nf5 ab4+/–) 17.Bc3+– a6 (better is 17...Re8+–) 18.Qg4 f6 (18...Kh8+–) 19.Qf5 fe5 20.Qh7 Kf7 21.Bg6 Kf6 22.Be8!! ed4 (22...Qe8 23.Qf5#) 23.Qg6# 1–0. miehnekort – littlehessmess, Yahoo, 2005.

3.Nf3 Bb7 4.e3 d5 5.cd5 Nd5 6.a3 g6 (6...e6!?=) 7.Bb2+= (7...Nf6 8.Bc4+=). pierre (2025) – fsakvador, internet, 2006.

2.c4 g6

3.Bb2 f6 4.g4 (4.Nf3 e5 5.a3 Bb7+=) 4...Bg7 (4...Bb7 5.Nf3=) 5.Bg2+= d6?? (better is 5...c6+=) 6.Ba8+– 1–0. orangutanb4 (2055) – roli76, kurnik, 2011.

3.Bb2 Nf6 4.b5 Bg7 5.e3 a6 6.a4 Bb7 7.Nc3 0–0 8.Nf3 c6 9.Be2 e6 10.0–0 d5 11.cd5 cd5 12.Rc1 a5 13.Ba3 Re8 14.d4 Nbd7 15.Bd3 Rc8 16.Ne2 Ne4 17.Nd2 f5 18.f3 Nef6 19.Ng3 h5 20.e4 f4 21.Ne2 de4 22.Ne4 Ne4 23.Be4 Be4 24.fe4 g5 25.e5 Kh7 26.Qd3 Kh6 27.Bd6 Ne5 28.de5 Rc1 29.Rc1 Be5 30.Rc6 Qf6 31.Nc3 Bc3 32.Qc3 Qc3 33.Rc3 Kg6 34.Rc6 Kf5 35.Rb6 Rc8 36.Rc6 Rd8 37.Bc7 Rd2 38.Ba5 Ra2 39.Rc5 Kg6 40.Rc6 Kf5 41.Rc5 Kg6 42.Bd8 g4 43.Rg5 Kh6 44.a5 Ra5 45.Rh5 Kh5 46.Ba5 1–0. thecat74 – jnr8, kurnik, 2012.

3.Bb2 Nf6 4.e4=.

2.d4 Bb7

3.Bb2 (--> 2.Bb2 Bb7 3.d4).

3.b5 a6=+ 4.c4 a5 (4...e6 5.e3=+) 5.a4 (5.Nf3 e6+=) 5...c5 (5...e6 6.e3=) 6.d5 d6 (6...e6 7.e4+=) 7.e4+= g6 8.Bb2 f6 (8...Nf6 9.Bf6 ef6 10.Bd3+=) 9.g4 (9.Bd3 Bg7+–) 9...e5 10.h4 (10.de6 Be4 11.f3 Bb7+–) 10...h6 (10...Bh6 11.h5+=) 11.Bc1 (11.h5 g5+=) 11...Bg7 12.Ra3 Ne7 13.f4 (13.Rg3 Nd7+=) 13...Nd7 (13...ef4 14.Bf4 Qc7 15.h5=) 14.f5+= Bc8 15.h5 gf5 (15...g5 16.Nc3+=) 16.ef5 (16.gf5!? Rg8 17.Rg3+–) 16...Nf8 17.Nc3 Nd7 18.Nf3 Nf8 (18...Bb7 19.Nh4+–) 19.Nh4 Bd7 (19...Kd7 20.Ng6 Nfg6 21.hg6+–) 20.Ne4 Qb8 21.Rb3 Rg8 (21...Qc7 22.Ng6 Nfg6 23.hg6+– (23.fg6?! f5 24.gf5 Nf5+–)) 22.Qf3 (22.Bh6 Bh6 23.Nf6 Kd8 24.Ng8 Ng8+–) 22...Ra7 (22...Nh7 23.Ng6+–) 23.Rh3 (better 23.Bh6 Bh6 24.Nf6 Kd8 25.Ng6 Nfg6 26.Ng8 Ng8 27.hg6+– (27.fg6?! Kc7+=)) 23...Bh8? (better 23...Kd8+–) 24.Bh6+– Rg4 (24...Kd8+–) 25.Qg4 Bf5 (25...Bc8+–) 26.Nf5 Nf5 27.Qf5 Rf7 28.Bf8 (better 28.Rbg3 Qc7 29.Rg8 Qd7+–) 28...Kf8 29.Rhg3 Bg7 30.Rg6 (30.h6 Bh6 31.Nf6 Bg5 32.Rg5 Rg7 33.Nd7 Kg8 34.Qe6 Kh8 35.Rh3 Rh7 36.Qf6) 30...Qd8 31.Rbg3 Qe7 32.Qc8 (32.h6 Qd8 33.hg7 Ke8 34.Qe6 Qe7 35.Nd6 Kd8 36.Qc8) 32...Qe8+– 33.Qe8 Ke8 34.Nd6 (34.Nd6 Ke7 35.Nf5 Kf8 36.h6 Ke8 37.hg7 e4 38.g8R Rf8 39.Rf8 Kf8 40.Rg8 Kf7 41.R3g7) 1–0. afsharian – ggms7 (1620), lichess.org, 2017. (=1.d4 b6 2.b4 Bb7)

3.c3 g6 4.e3 Nc6 (4...Nf6 5.Nf3=) 5.Nf3+= Bg7 6.Bd3 Nf6 7.0–0 0–0 8.e4 d5 9.e5 Nd7 10.Be3 (10.Qe2 e6+–) 10...e6 11.Qd2 f6 12.ef6 Qf6 13.Bh6 (13.Bg5 Qf7+=) 13...Ne7 (13...a6!?=) 14.Bg7+– Kg7 15.Ng5 (15.Re1 Rae8+–) 15...c5 (15...e5!? 16.Qe3 e4=+) 16.bc5 (16.Qe3 e5 17.Nh7 Kh7 18.Qh3 Kg7 19.Qd7 Bc8+=) 16...bc5 17.dc5 (17.Qe3 e5 18.de5 (worse 18.dc5 h6 19.Nf3 e4=+) 18...Ne5 19.Rd1–/+) 17...Nc5=+ 18.Na3? (better 18.f4=+) 18...Nd3–+ 19.Ne6 Qe6 20.Qd3 Qg4 (20...Qf6 21.Nb5–+) 21.h3 Qg5 22.Nb5 d4! 23.g3 (23.Nd4 Qg2 Mate attack; 23.cd4 Qg2 Mate attack; 23.Qd4 Rf6 Combination) 23...dc3 24.Qc3 Rf6 (24...Kg8 25.Rae1–+) 25.Qc7 (25.Rfe1 Nd5 26.Qb2 Kg8–+) 25...Qb5 (25...Qd5 26.f3 Re8 27.Rae1 Qb5 28.Rb1–+) 26.Qe7 (26.Rab1 Qf5 27.Rb7 Rf7–+) 26...Rf7 27.Qd6 Bc8 (27...Qf5!? 28.Qd4 Kg8 29.Qg4–+) 28.h4 (28.Rfb1 Qf5 29.Qd4 Qf6 30.Qf6 Kf6–+) 28...Bh3 29.Rfe1 Qb7 (29...Raf8 30.f4–+) 30.Rac1?? (30.Qe5 Kg8 31.Qe4–+) 30…Qg2 0–1. anonym1337 – mr_6o6o, lichess.org, 2020.

2.d4 d5

3.a3 a6 4.e3 Nc6 5.c3 e6 6.Nd2 Bd6 7.Ndf3 Nge7 8.Nh3 (8.c4 dc4 9.e4 Ng6=) 8...f6 (8...e5 9.c4 dc4 10.Nhg5 ed4 11.Bc4=+) 9.Bd3 0–0 10.e4 Ng6 11.g3 (11.Qe2!?+=) 11...e5 12.ed5 Nce7 13.c4? (13.Nhg1 Re8=) 13...ed4 (better is 13...Bh3 14.c5 Bg2–/+) 14.Nd4? (better is 14.Nhg1=+) 14...Bh3–+ 15.Nc6? Nc6 16.Bg6 Qe7 17.Be3 hg6 18.dc6 Qe4 19.Rg1 Qc4 20.Rc1 Bb4 21.ab4 Qb4 22.Qd2 Qe4 23.Qa2 Kh7 24.Qc4 Qc4 25.Rc4 Bf5 26.g4 Bd3 27.Rd4 Bb5 28.h4 Bc6 29.Rc4 Bd5 30.Rc7 b5 31.f4 Rfe8 32.Kf2 a5 33.Rd1 Bc4 34.Rdd7–/+ Rg8 35.g5 Be6 36.Re7 Rae8 37.gf6 Re7 38.Re7 Bf5?? 39.Bd4?? Kh6?? 40.f7+– Rf8 41.Kg3 Bd3?? 42.h5 a4?? 43.f5?? Bf5 44.Kf3?? a3 45.Ke2? a2 46.Kd2 b4 47.Kc1 Kh5 48.Bg7? b3?? 49.Kb2= Ra8 50.Re8?? a1Q 51.Kb3 Qb1 52.Kc3 Ra3 53.Kd4 Qb4 54.Ke5 Ra5 55.Kf6 Qd4 56.Ke7 Qg7 57.Rh8 Qh8 58.f8Q Qe5 59.Kf7 Ra7 60.Kg8 Be6 61.Qf7 Ra8 62.Kh7 Rh8 (62...Bf7?!=) 0–1. michael709 – Rudolf, internet, 2007.

3.Nc3 Nf6 4.Nf3=.

3.Nc3 Bg4 4.b5 Nd7 (4...Nf6!? 5.Nf3 Bf5+=) 5.a3 ½–½. Savanovic,Aleksandar (2415) – Karahmetovic,Adnan (2295), BIH–chT, 2009.

3.e3 e5 4.b5=.

3.e3 e6 4.c3 (4.a3 c5=) 4...Nf6 5.Nf3 Bd6 6.Bd3 0–0 (6...c6 7.Qa4=) 7.0–0 Bb7 8.Nbd2 Ne4 (8...Nbd7 9.a3=) 9.Qc2 (9.a3 c5=) 9...f5 10.Ne5 (10.Rb1 Qe7=) 10...c5 11.f3 (11.bc5 Be5 12.Be4 Bh2 13.Kh2 Qh4 14.Kg1 fe4=) 11...Nd2 12.Bd2 (12.Qd2 c4 13.Be2 Nd7+=) 12...Nc6 (12...Be5 13.de5 c4 14.Be2=) 13.Nc6 Bc6 14.dc5 (14.b5 Bb7=) 14...bc5+= 15.f4 (15.b5 Bb7+=) 15...c4 16.Be2 Qf6 17.a4 a6 18.Bf3 Rab8 19.Rfd1 g5 (19...e5 20.Be1 Qe6 21.Bg3+=) 20.Ra2 Qh6 21.g3 Be7 22.Bg2 Bf6 23.Re1 Qh5 24.Rf1 g4–/+ 25.Raa1 Rf7 26.Rad1 Rg7 27.Rfe1 Rg6 28.Kf2 Rh6 29.Rh1 Qe8 30.Ra1 Rb7 31.Ra3 Rh5 32.Raa1 Qg6 33.Rad1 Ra7 34.Rb1 White prepares b5 34...Qh6 35.h3 gh3 36.Bf3= h2 37.b5 ab5 38.ab5 Bb7 39.Bh5 Qh5 40.Qd1 Qh6 41.Ra1? Ra1–+ 42.Qa1 d4! 43.ed4 Qh3 Do you see the mate threat? 44.Qf1 Qf1 45.Rf1 Kf7 46.Bc1 Ke8 47.Ba3 Kd7 48.Bc5 Bd8 49.Ke3 h1Q The mate threat is Qxf1 50.Rh1 Bh1 51.Ke2 Ba5 52.Kd2 Be4 53.Bf8 Kc7 54.Bc5 Kb7 55.Be7 Kb6 56.Bd8 Kb5 57.Ba5 Ka5 58.Kc1 Ka4 59.Kb2 Bb1 60.Kb1 Kb3 61.Kc1 Kc3 62.Kd1 Kd4 63.Kd2 c3 64.Kc2 h5 (64...h5 65.Kd1 Ke3–+) 0–1. Jonsson,Gudbrandur – Schulz,Hans_Juergen, TT–11 ETC, 2003.

3.Nf3 e5 4.Ne5 Bb4 5.Bd2 Bd6=.

2.d4 e6

3.b5 a6 4.c4 Nf6 5.Bb2 Bb4 6.Nd2 Ne4 7.Ngf3 g5 (better is 7...Qf6!? 8.Bc1 ab5 9.cb5 Bc3–/+) 8.a3= Ba5 9.Qc2 Bb7 10.d5 Rg8?? (better is 10...Nd2 11.Nd2 0–0=) 11.Qe4+– g4 12.Ne5 ab5 13.Qh7 (13.cb5?! f5 14.Qf4 Bd5+–) 13...Rf8 14.de6 de6 15.0–0–0 Qg5 16.e3 Nc6 17.Nc6 Bc6 18.h4 gh3 19.Rh3 Rd8 20.Rg3 Qc5 21.Rg8 bc4 22.Rf8 Kf8 23.Qg7 Ke8+– 24.Qg8 Ke7 25.Bf6! Kf6 26.Qd8 Kg7 27.Qd4 Qd4 28.ed4 Bd5 29.Nc4 Bc3 30.Ne5 f6 31.Rd3 Ba5 32.Rg3 Kf8 33.Nd7 Ke7 34.Rg7 Kd6 35.Nf6 Bc3 36.Rd7 Kc6+– 37.Rd8 Bb3 38.d5! ed5 39.f3 Bf6+/– 40.Rf8 Be7 41.Rf7 Ba3 42.Kb1 d4 43.Rf6 Kb7 44.g4 Bc5 45.g5 Bd5 46.g6 Be7 47.Rf5 Be6? 48.Re5 Bf6 49.Re6 Bg7 50.Re7 Bf6 51.g7 Bg7 52.Rg7 Kc6 53.Bd3 Kd6 54.Kc2 c6 55.Kb3 c5 56.Kc4 Ke5 57.Rg5 Kf4 (57...Kf4 58.Rg6 Kf3 59.Rb6 Ke3+–). mapaj – jnr1, kurnik, 2012.

3.c3 Bb7 4.Nf3 a5 5.ba5 Ra5 6.e3 Nf6 7.Bd3 Be4 8.0–0 Bd6 9.Be4 Ne4 10.Qd3 f5 11.Nbd2 Nd2 12.Nd2 Be7 13.Nc4 Ra4 14.d5 0–0 15.Rd1 Na6 16.de6 de6 17.Qe2 Qa8 18.Nb2 Re4 19.Rd7 Rf7 20.f3 Rh4 21.g3 Rh6 22.Nc4 Bf6 23.Rf7 Kf7 24.Bd2 Nc5 25.e4 Rh5 26.g4 fg4 27.fg4 Rh3 28.Ne5 Kg8 29.Qg2 Be5 30.Qh3 Ne4 31.Qf3 Qd5 32.Rf1 Bh2 33.Kh2= Qd2 34.Kg1 Nf6 35.Rd1 Qc2 36.Rd8 Kf7= 37.Rd7 Kg6 38.Rc7 Qb1 39.Qf1 Qe4 40.Rc4 Qe3 41.Qf2 Qd3 42.Rc6+= Qd1 43.Qf1 Qg4 44.Qg2 Qg2 45.Kg2 Kf5 46.Rb6 Nd5 47.Rb7 Nc3+= 48.Rg7 e5 49.Rh7 Na2= 50.Kf3 Nc3 51.Rh5 Ke6 52.Rh8 Nd5 53.Rd8 Nf6 54.Rf8 Kf5 55.Ke3 Ke6 56.Kf3 Kf5 57.Ke3 Ke6 58.Rc8 Kf5 59.Rc5 Ng4 60.Kf3 Nf6 61.Ra5 Nh5 62.Rd5 Nf6 63.Rc5 Ne4 64.Rc2 Nf6 65.Rc5 Ne4 66.Rc1 Nf6 67.Kg3 Nd5 68.Rf1 Ke4 69.Rd1 Nc3 70.Rd8 Ke3 71.Kg4 e4 72.Kg5 Ke2 73.Rd4 e3 74.Kf5 Nb5 75.Rb4 Nc3 76.Rd4 Kf2 77.Rf4 ½–½. COMP – COMP, 2001.

3.e4 Bb4 4.c3 Be7 5.Nf3 Nf6 6.Bd3 d6 7.0–0 Bb7 8.Re1 0–0 9.Bg5 (9.Qc2 Ba6+=) 9...Nbd7 10.Nbd2 e5 11.h3 h6 12.Bh4 (12.Bf6 Bf6 (worse is 12...gf6 13.Nh4 Kh7 14.Qh5+/–) 13.Rb1 ed4 14.cd4 c5+=) 12...Nh5–/+ 13.Bg3 (13.Be7 Qe7 14.Bb5 c6–/+) 13...ed4 14.cd4 Ng3 15.fg3 d5 16.e5 (16.Rc1 Re8–/+) 16...c5 17.Bc2 (17.Bf5 g6 18.Bc2 Rc8–/+) 17...c4 (17...Rc8 18.Bf5 g6 19.Bc2–+) 18.g4 (18.Bf5 Qe8–/+) 18...Re8 (18...Rc8 19.Bb1 Re8 20.Qc2–+) 19.Nf1 (19.Bf5 g6 20.Bc2 Kg7–/+) 19...Bb4 20.Re2 Ba5 (20...Rc8 21.Rb1 a5 22.a4–+) 21.Ne3 b5 (21...Rc8–/+) 22.Nf1 (22.Rb1 b4–/+) 22...Nb8 (22...Bc3 23.Rc1–+) 23.Ng3 Nd7 (23...Nc6 24.Nf5 Bc7 25.Qd2–+) 24.Nf5 (24.Nf1 Bc3 25.Rc1 b4–+) 24...f6 (better is 24...Bb4–/+) 25.Nd6+= fe5? 26.Nb7+/– Qc7 27.Na5+– Qa5 28.Ne5 Ne5+/– 29.Re5 Re5 30.de5 Re8?? 31.Qd5+– Kh8 32.Qe4 Qb6 33.Kh2 Kg8 34.Qh7 Kf7 35.Rf1 Ke7 36.Qg7 Kd8 37.Rd1 Kc8 38.Bf5 Kb8 39.Rd7 (39.Rd7 Rd8 40.e6 Rd7 41.Qd7+–) 1–0. ashleysworld – Darkseid, ChessWorld.net, 2009.

2.e3 a6

3.Bb2 Bb7 (--> 2.Bb2 Bb7 3.e3 a6).

3.Nf3 Bb7 4.Be2 (4.a3 Nf6=) 4...h6 (4...e5 5.Ne5 Qg5 6.Bf3 Qe5 7.d4 Bb4 8.Bd2+=) 5.Bb2 Nc6 6.b5 (6.a3 e5+=) 6...ab5= 7.0–0 (7.Bb5 Ra5 8.Nc3 e5=) 7...b4+= 8.c3 (8.a3 ba3 9.Na3 Nf6+=) 8...bc3 (8...Nf6 9.cb4 Nb4 10.a3+=) 9.Nc3 d6 (9...e6 10.a3+=) 10.d4 (10.Bb5 e6=) 10...g6 (10...e6 11.e4=) 11.e4 (11.d5 Nb8+=) 11...Bg7 (better is 11...Nb8=) 12.e5 (better is 12.d5 Na5 13.Nd4=) 12...de5–/+ 13.de5 Qd1 14.Rfd1 e6 15.Nb5+= Rc8 16.Nfd4 Ne5 17.Na7? Rb8 18.Bb5 c6?? 19.Ndc6+– Bc6 20.Nc6 Nc6 21.Bg7 Rh7 22.Bc6 Ke7 23.Rd7 Ke8 24.Rb7 Kd8 25.Rb8 Kc7 26.Rg8 Kc6 27.Rc8 Kb7 28.Rg8 f5?? 29.Bd4 Rd7 30.Rg7 Rg7 31.Bg7 h5 32.f4 b5 33.Kf2 Kc6 34.Rd1 Kb6 35.Kf3 h4 36.Bf6 Ka5 37.Bh4 b4 38.Be7 Ka4 39.g4 fg4 40.Kg4 Ka3 41.Kg5 1–0. gtate (1800) – maf, net–chess.com, 2002.

3.Nf3 Nc6 4.a3 Bb7 (4...e5 5.Bb2 e4 6.Ne5=) 5.Bb2 (5.d4 Nf6+=) 5...f6 (5...Nf6 6.Bf6 ef6 7.d4+=) 6.d4+= g6 (6...e6 7.c4+=) 7.Bd3 (7.d5 Na7+/–) 7...Bg7 8.c4 e6 9.0–0 Nge7 10.Nbd2 0–0 11.Qc2 a5 12.b5 Nb8 13.a4 c6 14.Ba3 c5? (better is 14...d6!?+/–) 15.dc5+– f5 16.Rac1 f4? (16...bc5 17.Bc5 d6 18.Ba3+–) 17.ef4 Rf4 18.cb6 Qb6?? 19.Be7 d5 20.cd5 ed5 21.Qc7 Qc7 22.Rc7 Be5 23.Rb7 Ra4 24.Ne5 Ra2 25.Ndf3 Nd7 26.Nd7 Rb8 27.Rb8 Kf7 28.Bc5 a4 29.Nfe5 Ke6 30.Re8 1–0. Fournier,Frederic (1945) – maregua, Active, 2011.

3.Nf3 Nf6 4.Bb2=.

2.e3 e5

3.Bb2 b5 4.Be5+– Na6 (4...Nc6 5.Bf4+–) 5.a3 (5.c3 Bb7+–) 5...c6+– 6.Nf3 Bc5?? (better 6...f6 7.Bf4 Nc7+–) 7.bc5 (better 7.Bg7 Bf8 8.Bh8 Nc7+–) 7...Kf8 (7...f6 8.Bd6+–) 8.c4 Ke8 (8...b4+–) 9.Bg7 1–0. DEFFM – GuestBBVG, freechess.org, 2016.

3.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.e3 b6).

3.Bb2 e4!?=.

2.e3 e6

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

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

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

3.c4 Bb4–/+ 4.Bb2 Nf6 5.Nf3 0–0 6.Be2 Bb7 7.0–0 d5 8.cd5 Nd5 9.Ne1 (9.Nc3 a6–/+) 9...Nd7 10.Bf3 Qh4 11.g3 Qg5 12.Ba3 Ba3 13.Na3 Rad8 14.h4 (14.Rc1 c5–+) 14...Qf6 15.e4 Nb4 16.Nac2 (16.e5 Bf3 17.ef6 Bd1 18.fg7 Kg7 19.Rd1 Na2–+) 16...Nc2 17.Nc2 Ne5 18.Bg2 Ba6 19.Re1 (19.f4 Bf1 20.fe5 Qe5 21.Kf1 Qg3–+) 19...Nd3 20.Re3 Qf2 21.Kh1 (21.Kh2 Nb2 22.Qe1 Qd2–+) 21...Qe3! 22.Kh2 Qf2 (22...Qf2 23.Qg1 Qd2–+) 0–1. Hasler,Ueli – Rogovsky,Daniel (1880), CiF, 2006.

2.e3 g6

3.Bb2 f6 4.b5 a6 5.a4 ab5 6.ab5 Bb7 7.Ra8 Ba8 8.c4 c6 9.Nf3 cb5 10.cb5 Bg7 11.Bc4 Nh6 12.0–0 e6 13.Ng5 (13.d4 Nf7+–) 13...0–0 14.Be6?? (better 14.Nf3+=) 14...de6–/+ 15.Ne6 Qd5 16.Nf4 (16.Qf3 Qe6 17.Qa8 Ng4–/+) 16...Qd7 (better 16...Qb5!? 17.Qc2 Nf7–+) 17.Qb3–/+ Kh8 (17...Qf7 18.Qf7 Kf7 19.Rc1=+) 18.Nc3=+ Ng4 (18...Qd2?? 19.Rd1 Qd7 20.Rd7 Nd7 21.Qc4+–) 19.d4 Re8 (19...g5 20.Nh5=+) 20.d5 (20.Qa2 Qb7=+) 20...Ne5 (20...g5 21.Nh5 Qd6–/+) 21.Ne6? (21.Rd1 Qf5=) 21...Qb7 (better 21...Bd5 22.Nd5 Qe6 23.Be5 fe5–+) 22.Ng7 Kg7 23.e4 Nbd7 24.f4 (24.Qc2 Qc7=+) 24...Nd3 25.e5? (better 25.Ba3=+) 25...fe5–+ 26.fe5 N7e5 27.Ba1 Qd7 28.Ne4 Qd5 29.Be5?? (better 29.Qd5 Bd5 30.Nf6–/+) 29...Ne5 30.Qd5 Bd5 31.Nd6 (31.Nc3 Bc4 32.Ra1 Nd3–+) 31...Rd8 (31...Rd8 32.Re1 Rd6 33.Re5 Kf6–+) 0–1. GuestPKCH – GuestZWVF, freechess.org, 2017.

2.f3 c5

3.bc5= bc5 4.Nc3 Ba6 5.e4 Nc6?? (better is 5...Bf1 6.Kf1 e6= (6...Nc6 7.Nge2 Nf6 8.Kf2 e6 9.Rb1 Rb8) 7.Nge2 Nc6 8.d4 cd4 9.Nd4 Qa5) 6.Ba6+– Nd4 7.Nge2 Qb6 8.Bd3 Nf6 (8...Qc6 9.Rb1+–) 9.Rb1 Qd6 (9...Qc7 10.Nd4 cd4 11.Nb5+–) 10.Nd4 cd4 11.Nb5 Qf4 12.Bb2 e5 (12...a6 13.Nd4 Qc7+–) 13.Nc7 Kd8 14.Na8 Ng4 15.fg4 Qg4 16.Qg4 Bc5 17.Bb5 Ke7 18.Qd7 Kf6 19.Qf5 Ke7 20.Qe5 Kf8 21.Qe8# 1–0. marere – quts, internet, 2011.

3.bc5 bc5 4.Nc3 d5 5.e3 e6 6.Rb1 Nf6 7.f4 c4 8.Nf3 Nc6 9.Be2 Bd6 10.0–0 0–0 11.d3 cd3 12.cd3 Ba6 (12...a6!?=) 13.Qa4+/– Qc8 14.Ba3 Ba3 15.Qa3 Rb8 16.Rb8 Nb8 17.Rc1 Nc6 (17...Qb7!?+=) 18.Ne5+/– d4? (better is 18...Qb7 19.Nc6 Qc6 20.Nd5 Qd5 21.Qa6 Qd7+/–) 19.Nd1+– de3 (19...Bb5 20.Nc6 Bc6+–) 20.Rc6 1–0. marekt – surferbill, internet, 2011.

3.bc5 bc5 4.Nc3 e6 5.Nh3 (5.e4 Nc6=) 5...d5 6.e4 d4 7.Na4 Qa5 8.Nb2 Nc6 9.a4 Nf6 10.Bb5 Bd7 11.Nc4 Qc7 12.0–0 Bd6 13.Nd6 Qd6 14.Nf2 a6 15.Bc4 0–0 16.Nd3 g5?? (better is 16...Ne5 17.Ne5 Qe5=) 17.Ba3+– Nb4? (better is 17...Rfb8+–) 18.e5 Qe7 19.ef6 Qf6 20.Nc5 Ba4 21.Bb4 Bc6 22.Ne4 Be4 23.fe4 Rab8 24.Rf6 Rb4 25.Qh5 Rc4 26.Rh6 Kg7 27.Ra5 f6 28.Rh7 (28.Rh7 Kg8 29.Qg6) 1–0. marekt – ChrisLondon, chessworld.net, 2011.

2.f3 d5

3.Bb2 Nf6 4.c4 e6 5.cd5 ed5 6.Qa4 c6 7.Nh3 b5 8.Qc2 a5 9.a4 ab4 10.ab5 Ra1 11.Ba1 Bd6 (worse is 11...cb5 12.Bf6 gf6 13.Nf4+=) 12.bc6 Qb6 13.Bf6 gf6 14.Qb2 Nc6 15.e3 d4 16.Na3 Ba6 17.Ba6 Qa6 18.Nc2 0–0 19.f4 Bc5 20.Nf2 (20.Nd4? Nd4 21.Ng1 Qd3–+; 20.ed4?? Nd4 21.Kd1 Qe2 22.Kc1 Qg2–+) 20...Re8 21.Kd1 f5 22.g4 de3 (22...de3 23.de3 Qc4 24.gf5 b3 (24...Be3? 25.Rg1 Kf8 26.Qg7 Ke7 27.Ne3 Rd8 28.Ke1 Qf4 29.Nfg4+–) 25.Rg1 Kf8 26.Qh8 Ke7 27.f6 Kd8 28.Qh7 b2–+ (28...bc2?! 29.Qc2 Qc2 30.Kc2–+; 28...Qc2?! 29.Qc2 bc2 30.Kc2–+)) 0–1. pierred (2800) – rajagopal (2835), net–chess.com, 2011.

3.Nc3 e6 4.b5 Bd6 5.Nh3 a6 6.Bb2 Nf6 7.e3 a5 8.Bd3 Qe7 9.0–0 e5 (9...0–0= 0.05) 10.Nf2 0–0 11.Ng4 Ng4 12.fg4 Bb7 13.e4 Bc5 (13...d4!? 14.Nd5 Bd5 15.ed5 a4=) 14.Kh1+= Bd4 (14...d4 15.Nd5 Bd5 16.ed5=) 15.Nd5+/– Bd5 16.Bd4 Bb7 (16...ed4 17.ed5 Nd7 18.Rf4+/–) 17.Bc3 Nd7 18.Qe2 Nc5 19.Rf5 f6 20.g5! Rad8 (20...fg5 21.Be5 Deflection) 21.Bc4 Kh8 22.gf6 gf6 23.d3 Bc8 24.Rh5 Be6 25.Be6 Ne6 26.Rh6 Nf4 27.Qf2 Qg7 28.Rh4 Rg8 29.g3 Ng6 30.Rh5 Qf7 31.Be5! Rdf8 32.Bd4 Ne5 33.Rf5 Ng4 34.Qf4 Qg6 35.h3 Ne5 36.Rf6! Rf6 37.Be5 Rgf8 38.Rf1 Kg7 39.Bf6 Rf6 40.Qc7 Kh6 41.Rf6 Qf6 42.Qf4 Qf4 43.gf4 Kg6 44.c4 Kf6 45.c5! bc5 46.b6 Ke6 47.b7 Kd6 48.b8Q (48.b8Q Kd7 49.Qb7 Ke6 50.Qc6 Kf7 51.e5 Kf8 52.e6 Kg7 53.Qd7 Kg6 54.Qf7 Kh6 55.Qe7 Kg6 56.Qg5#) 1–0. mrkt – azatied, internet, 2011.

2.f3 Nf6

3.Bb2 d5 4.c4 e6 5.cd5 Nd5 6.a3 Qh4 7.g3 Qg5 8.e4 Nb4?? (better is 8...Nf6+= 9.Nc3 Qh5) 9.ab4+– Bb4 (9...Bd7 10.Nh3 Qh5+–) 10.Qa4 Nc6 (10...Bd7 11.Qb4 c5+–) 11.Qc6 Ke7 12.Qa8 Rd8 13.f4 Qc5 14.Ne2 Qc2 15.Bg7 Bd2 16.Nd2 Qd2 17.Kf2 a5 18.Bh3 Bd7 19.Bf6! Kf6 20.Qd8 (20.Qd8 Kg7 21.Rhd1 Qd3 22.Rd3 Be8 23.Qe8 a4 24.Rd7 b5 25.Qf7 Kh6 26.Qh7) 1–0. marekt – robgb, internet, 2011.

3.Bb2 e6 4.b5 d5 5.e3 a6 6.a4 Bc5 7.Nc3 e5 8.Nh3 Bh3 9.gh3 0–0 10.Rg1 d4 11.Ne4 Ne4 (11...de3?! 12.Nc5 bc5 13.de3+=) 12.fe4 ab5 13.Qg4 g6 14.Bb5 de3 15.de3 Be3 16.Rg2 c6 17.Bf1 Bf4 18.h4 b5! 19.Qh3 (19.ab5 Ra1 Double attack) 19...Ra4 20.Ra4 ba4 21.Ba3 Qa5 22.c3 Rd8 23.h5 Kg7 24.Bc4 Qb6 25.Ba2 Qa7 26.Qf3 Na6 27.Qf2? (27.hg6 fg6 28.h3 Qe3 29.Qe3 Be3–+) 27...Qd7 28.Qf3 (28.Qc2 Qd3 29.hg6 fg6–+) 28...Qd3 29.h6 Kg8 30.Qd3 Rd3 0–1. pcmvr (2850) – rajagopal (2835), net–chess.com, 2011.

2.f3 g6

3.Bb2 Nf6 4.c4 Bg7 5.d4 0–0 6.e4 d6 7.Bd3 c5 8.bc5 bc5 (worse is 8...dc5 9.e5 Bb7 10.ef6 Bf6 11.Ne2+/–) 9.d5 (9.e5 de5 10.de5) 9...Nh5 (better is 9...Nbd7+= 10.Ne2) 10.Ne2?? (better is 10.Bg7 Ng7 11.Ne2=) 10...Bb2–+ 11.Nbc3 Ba1 12.Qa1 Na6 13.0–0 Nb4 14.Bb1 e6 15.a3 Na6 16.Nb5 ed5 17.cd5 Qe7 18.Qc3 Nc7 19.Bd3 Nb5 20.Bb5 a5 (20...Rb8 21.Bc4–+) 21.Bd3 (21.Re1 Ra7–+) 21...Ba6 22.Ba6 Ra6 23.Nc1 Rb8 24.Nd3 Qf6 25.Qf6 Nf6 26.Rc1 Nd7 27.Kf2 Ne5 28.Ne5 de5 29.Rc2 c4! 30.Ke2 c3! 31.Kd3 Rc8 32.Rc3 Rc3 33.Kc3 Kf8 34.Kc4 Ke7 35.Kc5 a4 36.Kb5 Ra8 37.Kb4 Kd6 38.g3 Kc7 39.Kc5 Ra5 40.Kb4 Kb6 41.d6 Ra8 42.Kc4 Rd8 43.Kd5 Kb5 44.Ke5 Kc6 45.f4 Rd6 46.f5 f6 47.Kf4 g5 48.Ke3 Kc5 49.g4 Kc4 50.e5 fe5 51.Ke4 Rd2 52.Ke5 Rh2 53.Kf6 Kb3 54.Kg5 Ka3 55.f6 Kb2 56.f7 Rf2 57.f8Q Rf8 58.Kh6 Rf7 59.g5 a3 60.g6 hg6 61.Kg6 Ra7 (61...Ra7 62.Kf6 a2 63.Ke5 a1Q 64.Ke4 Qe1 65.Kd5 Rd7 66.Kc6 Qe6 67.Kb5 Rd5 68.Kb4 Qe4; 61...Rf2 62.Kh6 a2 63.Kg6 a1Q 64.Kh5 Rg2 65.Kh4 Qh1) 0–1. morkt – adamio, kurnik, 2011.

3.Nc3+= Bg7 4.Bb2 Bb7 5.b5 e6 6.Nh3 Ne7 7.a4 0–0 8.a5 d6 (8...a6 9.ab6 cb6 10.e4+=; 8...ba5+=) 9.a6= Bd5?? (better is 9...Bc8=) 10.e4+– Be4 (10...Nd7 A) 11.Nd5 Bb2 (11...ed5?! 12.Bg7 Kg7 13.Nf4=) 12.Rb1 ed5 (worse is 12...Nd5 13.Rb2 N5f6 14.d4+=) 13.Rb2 de4–/+; B) 11.ed5?! Nd5 12.Be2 Bd4+–; C) 11.Be2+–) 11.fe4 d5 12.Bd3 de4 (12...Nd7 13.0–0+–) 13.Be4 c6 (13...Nd5 14.Nf4! c6 15.Qf3+–) 14.0–0 Qd4 (14...f5 15.Bf3 Qd7 16.Re1+–) 15.Kh1 Qe4 (15...Qd7+–) 16.Ne4 Bb2 17.Ra2 Bg7 18.Qf3 cb5 (18...h6 19.Nf6 Kh8 20.c4+–) 19.Nf6 (better is 19.Neg5 Nbc6 20.Nh7+–) 19...Kh8 (19...Bf6 20.Qf6 Nbc6+–) 20.Qa8 Na6 21.Ng5 Ra8 (21...Nc8 22.Qc8! Bh6 23.Nf7 Kg7 24.Nh5 gh5 25.Qc3 e5 26.Qg3 Bg5 27.Qg5) 22.Nf7# 1–0. wyssy – ante, internet, 2011.

3.Nc3 Bg7 4.Bb2 Nf6 5.b5 Bb7 (5...a6 6.e4+=) 6.Nh3 e5 7.e3 d6 8.Bd3 0–0 9.0–0 a6 10.a4 ab5 11.ab5 Ra1 12.Qa1 c6 13.Qa7 Qc7 14.Ng5 Nbd7 15.bc6 Qc6 16.Bb5 Qc7 17.Ba6 Rb8 (17...Nc5!? 18.Bb7 Qb7 19.Qb7 Nb7=) 18.Nge4+= Nc5?? (18...Ne8 19.Nb5 Qc6 20.Bb7 Qb5 21.Ba3=) 19.Nc5+/– dc5 20.Nb5 Qd7?? (better is 20...Qc8 21.Nd6 Qf8 22.Be5 Ba6 23.Qa6 Nd7 24.Bg7 Qd6+/–) 21.Qb8+– (21.Qb8 Bf8 22.Qb7 Qd2 23.e4+–) 1–0. pierre – antere, internet, 2011.

2.Nf3 c5

3.a3 d5 4.e3 a6 5.Bb2 Nc6 6.b5 ab5 7.Bb5 Bd7 8.0–0 Ra5 9.c4 dc4 10.Bc4 b5 11.Bf7?? (better is 11.Be2+=) 11...Kf7–/+ 12.Ng5 (12.d4 cd4 13.ed4 Nf6–/+) 12...Kg6–+ 13.f4 h6?? 14.Qc2 Bf5+= 15.Qc5 Qd7 16.Nf3+= Nf6?? 17.Nh4+– Kh7 18.Qf5 Qf5 19.Nf5 g6 20.Nd4 Nd4 21.Bd4 b4? 22.ab4 Ra1 23.Ba1 Rg8 24.b5 Bg7 25.Na3 Ne4 26.Bg7 Kg7 27.Nc4 Rb8 28.Rb1 Rc8 29.d3 Nc3 30.Rb3 Na4 31.Rb4 Nc5 32.Ne5 Ra8 33.b6 Nb7 34.Kf2 Ra5 35.Nc6 Ra2 36.Kf3 e6 37.Re4 Nc5 38.Rd4 Rb2 39.Rb4 Rc2 40.b7 Nd7 41.Nd4 Rc1 42.b8Q Nb8 43.Rb8 Kf6 44.Rb6 Rf1 45.Kg3 (45.Kg3 Re1 46.Kf2+–) 1–0. Istvanny – yogsoggoth, internet, 2007.

3.b5 d6 4.a4 Bb7 5.e3 Nd7 6.c4 Ngf6 7.d4 e6 8.Be2 Be7 9.0–0 Ne4 10.Bb2 0–0 11.Ne1 Bg5 12.Nc2 d5 13.Nba3 Re8 14.Bd3 Ndf6 15.f4 Bh4 16.g3 Ng3 17.hg3+– Bg3 18.Qf3 Bh4 19.Qh3 Ne4 20.Be4 de4 21.dc5 bc5 22.Rad1 Qe7 23.Rd2 h6 24.Bg7! Kg7 25.Rh2 Rg8 26.Qh4 Qh4 27.Rh4 Kh7 28.Kf2 Rad8 29.Nb1 Rg6 30.Rh5 f5 31.Rfh1 a6 32.Ke1 Rdg8 33.Kd2 Bc8 34.Kc3 Rd8 35.Ne1 Bd7 36.Nd2 e5 37.fe5 ab5 38.ab5 Re8 39.Nc2 Re5 40.Ra1 Rge6 41.Ra7 Kg6 42.Rh1 Re7 43.Ra6 R7e6 44.Rha1 Bc8 45.Re6 Re6 46.Nb3 f4 47.ef4 e3 48.Nc5 Re7 49.b6 e2 50.Re1 h5 51.Kd2 (51...Rf7 52.Nd3+–) 1–0. Krueger – Granzeuer, corr SOK–87–10, 1987.

3.bc5 bc5 4.e4 Nf6+=.

2.Nf3 d5

(--> 1.b4 d5 2.Nf3 b6).

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

3.Bb2 Nf6 4.e3 e6 5.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 b6).

2.Nf3 d6

3.Bb2 Nf6 4.Nc3=.

3.Bb2 Bg4 4.h3 (4.e4 Nf6+=) 4...Bf3 5.ef3 d5 (5...Nf6 6.Be2=) 6.Be2 (6.Bd3 e6=) 6...Qd6 (6...e6 7.c4=) 7.Nc3 Qb4 (7...e5 8.0–0+=) 8.Nd5 Qb2? (better 8...Qd6!? 9.Ne3 e6+=) 9.Nc7+– Kd8 10.Na8 Nc6 (10...Qf6 11.Bd3+–) 11.c3 Nf6 (11...e6 12.0–0 Bd6 13.Qa4+–) 12.0–0 Kc8?? (12...Qa3+–) 13.Qa4 Na5 14.Rab1 Qd2 15.Ba6 Kb8 (15...Kd8 16.Rfd1 Qd6 17.Rd6 ed6 18.Nb6 ab6 19.Rb6 Nd7+–) 16.Nb6 ab6 17.Qa5 Qd6 (17...Qd8 18.Rb6 Kc7 19.Qc5 Kd7 20.Qc6) 18.Rb6 Kc7 19.Rd6 (19.Rb7 Kc8 20.Ra7 Kb8 21.Qb5 Ka7 22.Qb7) 19...Kd6 20.Rd1 Ke6 21.Bc8 Nd7 22.Bd7 Kf6 23.Qf5 1–0. Janek – puluu, internet, 2017.

3.d4 Nf6 4.c4 Nbd7 5.Nc3 g6 (5...c5 6.a3=) 6.g3 (6.b5 e5+=) 6...Bb7 7.Bg2 Bg7 8.0–0 (8.b5 a6=) 8...0–0 (8...c5 9.Qb3=) 9.Qb3 a5 (9...c5 10.bc5 dc5 11.d5=) 10.b5+= e5 11.Bb2 (11.de5 de5 12.Ba3 Re8=) 11...ed4= 12.Nd4 Bg2 13.Kg2 Ng4 (13...Nc5 14.Qc2=) 14.Nc6 Nc5 15.Qc2 Qf6 16.Rac1 Rfe8 17.h3 Nh6 18.Na4 (18.Ba1 Qe6 19.Nd5 Rac8+/–) 18...Qf5 (18...Qe6 19.Nc5 bc5 20.Bg7 Kg7 21.Rfe1+=) 19.Bg7 Kg7 20.Nc5 Qc5 21.Rfd1 Qf5 22.Qc3 f6 23.Nd4 Qe5 24.Qc2 (24.Qd3 Nf7+=) 24...Qe4 (24...Nf7 25.Qd3+=) 25.Qe4+= Re4 26.f3 Re3 27.Kf2 ½–½. Behrmann,Klaus Juergen – Krolla,Hans Peter, compuserve, 1998.

2.Nf3 e6

3.a3 Nf6 (--> 1.b4 e6 2.a3 Nf6 3.Nf3 b6).

3.Bb2 Bb7 4.a3 (--> 2.Bb2 Bb7 3.Nf3 e6 4.a3).

3.Bb2 Nf6 4.a3 c5 5.b5 Bb7 6.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6 6.Nf3 Bb7).

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

3.e4 Bb4 4.a3 Bf8 5.Bb2 Bb7 6.d3 f6 7.Nbd2 d6 8.Nh4 Nd7 9.Qh5 g6 10.Ng6 Bh6 11.Nh8 Ke7 12.Qf7 1–0. arti000 – alinel, kurnik, 2012.

2.Nf3 f6

3.a3 d5 4.d4+=.

3.a3 d6 4.h3 (4.e4 e5+=) 4...e5 (4...a5 5.b5+=) 5.e4= Be6 (5...f5 6.ef5 Bf5 7.Be2+=) 6.Bb2 (6.d4 c6+/–) 6...c5 (6...a5 7.d4+=) 7.bc5 (7.Bb5 Kf7+=) 7...bc5 (7...dc5 8.Bb5 Nd7 9.Qe2=) 8.a4 (8.Nc3 Ne7+=) 8...a5 (8...Ne7 9.Nc3=) 9.Bb5+= Bd7 (9...Nd7 10.Nc3+=) 10.c4 (10.Nc3 Nc6+=) 10...Nh6 11.Nc3 (11.Na3 Be7=) 11...Be7 12.Nd5 0–0 13.Rf1 (13.Rb1 Nc6+=) 13...Be6 (13...Nc6 14.Bc3=) 14.Ne7 (14.d3 f5=) 14...Qe7 15.g4 (15.Rb1 f5 16.ef5 Nf5+=) 15...Nf7 (15...Na6 16.d3=) 16.Rg1 (16.d3 Nd7+=) 16...Na6 (16...Ng5 17.Ng5 fg5 18.Rb1+=) 17.Bc1 1–0. esko – mdinan (1700), net–chess.com, 2001.

3.d4 Bb7 4.c3 e6 5.Bf4 Ne7 6.Nbd2 (better is 6.e3!?=) 6...Nd5–/+ 7.Bg3 Nc3 8.Qb3 Ne4 9.Ne4 Be4 10.Nd2 Bd5 11.Qb2 f5 12.Rc1 (12.f3 Qg5–/+) 12...Bd6 (12...c6 13.Nc4–/+) 13.Bd6+= cd6 14.b5 a6 15.a4 ab5 16.ab5 0–0 17.Qb4 Ra2 (17...Qe7 18.e3+=) 18.h4 (18.e3 Qe7+=) 18...f4 (18...Qe7 19.e3–/+) 19.Qd6+= Rb2 20.e4 fe3 21.fe3 Qf6 22.Qg3 Qe7 23.e4 Rd2 24.Kd2 Be4 25.Be2 d6 26.Rhf1+= Bf5 27.Qe3 h5 28.Bh5+– Qa7? 29.g4 Qa5 30.Rc3 Qa2 31.Ke1 Qb1 32.Rc1 Qb4 33.Qd2 Qb5 34.gf5 Nd7 35.Be2 Qb3 36.Qc3 (36.Qc3 Qc3 37.Rc3 ef5 38.Rc7+–) 1–0. Schild,Christoph (2205) – Kuban,Guenter (2280), Oberliga Ost–B, 2000. (=1.Nf3 b6 2.b4)

3.e4+= e5 4.a3 Nc6 (4...Ne7 5.d4 ed4 6.Nd4+=) 5.Bc4 a6 6.d4 b5 (6...ed4 7.Nd4 Nge7 8.Nc6 Nc6 9.Bf4+=) 7.Bg8–/+ Rg8 8.de5 Ne5?? (Better is 8...Bb7–/+) 9.Qd5+– Nf3 (9...Bb7 10.Qg8 Be4 11.Ne5 fe5 12.0–0+–) 10.gf3 Rh8 11.Qa8 c6 12.Be3 Bd6 13.Nd2 Kf7 14.Qa7 Qe7 (14...Qc7 15.Qc7 Bc7 16.a4+–) 15.f4 Re8 16.Rg1 g6 17.0–0–0 f5 18.e5 Be5 19.fe5 Qe5 20.h4 Qa1 21.Nb1 Qe5 22.h5 f4 23.Bc5 Qe2 24.hg6 hg6 25.Rd4 Qe6 26.Rf4 Kg8 27.Bd4 Qd5 28.Rg6 Kh7 29.Rg7 Kh6 30.Rh4 Qh5 31.Rh5 Kh5 32.Qc7 Re1 33.Kd2 1–0. b4_player (2165) – Parashurama, GameColony.com, 2002.

2.Nf3 g6

3.e4 Bg7 4.d4 Bb7 5.Nbd2 (5.Nc3 Nf6 6.e5 Nd5 7.Nd5 Bd5+=) 5...e6 (5...Nf6 6.Bd3+=) 6.Bd3+= Ne7 (6...Nc6 7.c3+=) 7.0–0 (7.h4 d6+=) 7...0–0 (7...a6 8.c3+=) 8.c3 c5 (better is 8...Nbc6!?+=) 9.bc5+/– bc5 10.Rb1 Ba6 (10...Qc7 11.dc5 Ba6 12.Nb3+/–) 11.Rb8!+– Rb8 (11...Rb8 12.Ba6 Remove defender; 11...Qb8 12.Ba6 Remove defender) 12.Ba6 Rb6? (better is 12...Qa5 13.Qe2 Qa2 14.dc5 Qa5+–) 13.Bd3 cd4 14.cd4 Nc6 (14...d5 15.Ba3+–) 15.Nc4 White prepares e5 15...Rb8 16.e5 f6 17.Ba3 Nb4 18.Qd2 fe5 19.Bb4 Rf7 20.Nfe5 Be5 21.Ne5 Rf6 22.Rc1 Qb6 23.Nd7 Qd4 24.Nb8 Rf2 25.Qf2 Qb4 26.Rc8 Kg7 27.Rc7 Kh6 28.Qe3 Kh5 29.Rh7 Kg4 30.h3# 1–0. pierre – zapo, internet, 2010.

3.e4+= Bg7 4.d4 Nc6 5.c3+/– a5 6.b5 Na7 7.Bd3 Nf6 (7...d5 8.ed5 Qd5 9.Qe2+/–) 8.e5 Nd5 (better is 8...Ng4!?+/–) 9.c4+– Nb4 10.Be2 (10.Bf1 d6 11.a3 de5 12.ab4 e4+–) 10...d6 11.a3 de5 12.ab4 ed4 13.Bd3 (13.ba5?! d3 14.Ra2 de2 15.Qd8 Kd8+/–) 13...ab4 14.Be4 Be6 (14...Bg4 15.Bh6! Bf3 16.Qf3+– (16.gf3?! Bh6 17.Ba8 Qa8=)) 15.Qa4 Bc4 16.Ba8 Qa8 17.Nbd2 (17.Qa7?! Qe4 18.Be3 de3 19.Qa8 Qa8 20.Ra8 Kd7+=) 17...Qd5 (17...Bb5 18.Qb5! Nb5 19.Ra8 Kd7 20.Rh8 Bh8 21.Nc4+–) 18.Nc4 (18.Qa7?! Qe6 19.Kd1 Qe2 20.Kc2 Qd3 21.Kb2 Qc3 22.Kb1 Qd3 23.Kb2 Qc3 24.Kb1 Qd3 25.Kb2=) 18...Qc4 19.Qa7 d3 20.0–0 0–0 21.Rb1 b3 22.Qa3 Qb5 23.Rb3 Qf5 24.Rd1 e6 25.Rbd3 Be5 26.Ne5 Qe5 27.Bh6 Re8 28.Qe7! Qb5 29.Rd8 (29.Rd8 Rd8 30.Rd8 Qe8 31.Qe8) 1–0. pierre – Khalidmn, chess.com, 2007.

3.e4+= Bg7 4.d4 d5 5.e5+=.

2.f4 Bb7

3.d4 e6 4.Nf3 (4.a3 a5 5.ba5 Ra5+=) 4...d5 (4...Bb4 5.c3 Be7 6.e3–/+) 5.g3? (5.a3 c5=) 5...c5 (better is 5...Bb4!? 6.c3 Be7–/+) 6.bc5+= bc5 7.dc5 Bc5 8.Bg2 Qa5 9.Bd2 Qb6 10.Nc3 Bf2 11.Kf1 Bc5 12.Rb1 Qc7 13.e3 Ne7 14.Kf2 0–0 15.Re1 Nd7 16.Kg1 Rab8 17.Kh1 Ba6 18.Ne2 Rb1 19.Qb1 Rb8 20.Qd1 f5 21.Ned4+= Bd4 22.Nd4 Qd6 23.Bc3 Nc5 24.Qd2 Ne4+= 25.Be4 fe4 26.a3 Nc6 27.Bb4 Qd7 28.Nc6 Qc6 29.c3 Qc4 30.Qd4+= Bb5 31.Qa7= Qc8 32.Qd4 Qc4 33.h4 Qd4 34.ed4 Rc8 35.Ra1 Ba4 36.Kh2 h6 37.Kh3 g6 38.g4 Kf7 39.f5?? ef5–/+ 40.gf5 gf5 41.h5 Kf6 42.Rg1 Be8 43.Kh4 Rc7 44.a4 Rg7 45.Rg7 Kg7 46.a5 Bb5 47.Kg3 Kf6 48.Kf4 Bc4 49.Bd6 Bb5 50.Be5 Kf7 51.Bd6 Bc4 52.Ke5 e3 53.Kf5 e2 54.Bg3 Ba6 55.Ke5 Bc4 56.Kd6 Kf6 57.Kc6 Kg5 58.Kb6 Kh5 59.a6 Ba6 60.Ka6 Kg4 (60...Kg4 61.Be1 h5=) 0–1. 55aa55 – jhon2, kurnik, 2012.

3.Nf3 e6 4.Bb2 Nf6 (4...Bb4?? 5.Bg7 Ne7 6.Bh8+–) 5.a3 Be7 6.e3 d5 7.Be2 0–0 8.0–0 Nbd7 9.d3 c5 10.b5 a6 11.c4 ab5 12.cb5 Ra5 13.a4 Bd6 14.Ne5 Be5 15.fe5 Ne8 16.Nd2 Nc7 17.Bf3 f5 18.ef6 Nf6 19.Nb3 Ra8 20.a5 ba5 21.Na5 Qb8 22.Qb3 (22.Nb7?! Qb7 23.Ra8 Ra8=) 22...Nd7 23.Nb7 Qb7 24.Qc3 Nb5?? (better is 24...Rf7 25.Bh5 Rf1 26.Rf1 e5=) 25.Qg7# 1–0. lllllll21 – mage1, kurnik, 2012.

2.a3 Bb7

3.c4 c5 4.Nc3=.

3.c4 Nf6 4.Bb2 e5 (4...a5!?=) 5.Be5+= Be7 6.c5 (6.d4 d6 7.Bf4 0–0+=) 6...0–0 7.Qc1 Ng4 8.cb6 (8.Bb2 bc5 9.bc5 Nf2 10.Kf2 Bh4 11.g3 Bh1–+) 8...ab6 (8...Ne5 9.bc7 Qc8 10.d4–/+) 9.Bc7= (9.Qc7? Qc7 10.Bc7 Rc8–+) 9...Qc8 10.h3 (10.Qc3 Nc6 11.Bb6 Bf6+=) 10...Ne5 (better is 10...Nf2!? 11.Kf2 Bh4 12.g3 Bh1–/+) 11.Kd1 d6 (11...Bc6 12.b5 Qc7 13.e3=) 12.f4 (12.Bb6!? Bc6 13.b5 Bb5 14.Qc8 Rc8 15.Nc3+/–) 12...Ng6 13.Nf3 (13.Bb6 Qc1 14.Kc1 Nf4+=) 13...Na6 (better is 13...Bc6!? 14.b5 Qc7 15.bc6 Nf4=) 14.Bb6+/– Nf4 15.Be3 Nd5 16.Bg5 f6 17.Bh4 g5 18.Bg3 h5? 19.e4 Qc1 20.Kc1 Rac8 21.Kd1 Nb6 22.b5 Nc5+/– 23.h4?? g4 24.Nd4+/– Ne4 25.Ne6?? Ng3–+ 26.Nf8 Nh1 27.g3?? Kf8 28.a4 Ng3 29.Bd3 Bf3 30.Ke1 Rc1 31.Kf2 Nh1 32.Ke3 Nd5 33.Kd4–+ Nb4 34.b6 Be2! 35.Be2 Nc2 36.Kd5 Na1 37.b7 Rb1 38.Kc6 Ng3 39.Bd3 Rb2 40.Kc7 d5 41.b8Q Rb8 42.Kb8 Bd6 43.Kc8 Ke7 44.Bb5 Nb3 45.d3 Nf5 46.Kb7 Nh4 47.Bc6 g3 48.Bd5 g2 49.Bg2 Nc5 50.Ka7 Ng2 51.a5 Be5 52.Kb6 Nd3 53.a6 Bd4 54.Kb7 Bg1 55.a7 Ba7! 56.Ka7 h4 57.Ka6 h3 58.Kb6 h2 59.Kc6 h1Q 60.Kb5 Nge1 61.Kc4 Qc6 62.Kd4 Ke6 63.Ke3 Ke5 64.Ke2 Qg2 65.Ke3 Nc1 (65...Qf2#) ½–½. josueaurelino – karel34, kurnik, 2012.

3.c4 g6 4.Bb2 Nf6 5.e3 Bg7 6.Be2?? (6.Nf3 0–0=) 6...0–0?? (better is 6...Bg2 7.Bf3 Bh1 8.Bh1 c6–+) 7.h4 (better is 7.Nf3!?=) 7...Bg2 8.Rh2 Be4 9.Nc3 Bb7 (9...Bf5 10.h5=) 10.h5 (10.d4 a5=) 10...gh5 (10...e5 11.Qb3–/+) 11.Bh5 Nh5 (better is 11...e5!?=) 12.Qh5+/– h6 13.0–0–0 e6 14.Nh3 Qf6 15.f4 Qg6 16.Qe2 Kh7?? (better is 16...Qf6+/–) 17.Rg1+– Qf5 18.e4 Qf6 19.e5 (19.Nd1 Qg6 20.Bg7 Kg7 21.f5 ef5 22.Qh5 (< 22.Rg6 fg6 23.ef5 gf5 24.Qe5 Kg8+–) 22...Qg1 23.Ng1+–) 19...Qf5+/– 20.Nf2 (20.Ng5 Kh8 21.Rh6 Bh6 22.Qh5+–) 20...Qf4=+ 21.Kb1?? (21.Qd3 Kh8 22.Ng4 d5 23.cd5 Bd5+–) 21...d6 (21...Qh2!? 22.Qg4 Be5 23.Nd5 Bd5 24.cd5 Bb2 25.Kb2 Qe5 26.d4–+) 22.Rg4?? (22.Nfe4 Qe5 23.Rg7 Qg7 24.Rg2+–) 22...Qe5 (better is 22...Qh2 23.ed6 cd6 (< 23...Qd6 24.Rg7 Kg7 25.Nb5 f6 26.Nd6 cd6 27.Qe6=) 24.Rg7 Kg7 25.Nd5 e5–+) 23.Nfe4?? (better is 23.Qd3 Qf5 24.Nce4+–) 23...Be4 24.Re4 Qf5 25.Ka2 d5 26.cd5 ed5 27.Nd5?? (27.Rh5 Qh5 28.Qh5 de4 29.Qf5 Kg8 30.Ne4 Bb2 31.Kb2=) 27...Nd7 (better is 27...Qd5 28.Ka1 Bb2 29.Kb2 Nd7–+) 28.Bg7 (28.Ne7 Qf6 29.Bf6 Nf6+–) 28...Kg7?? (28...Qd5 29.Kb2 Kg7 30.Rg4 Qg5 31.Rg5 hg5+–) 29.Rg2 (29.Rg4 Qg6 30.Qe3 Rh8 31.Rg6 fg6 32.Qe7 Kg8 33.Qe6 Kg7 34.Qd7 Kg8 35.Qe6 Kg7 36.Qe7 Kg8 37.Nf6#) 29...Kh7? (better is 29...Kh8 30.Ne7 Qf6+/–) 30.Reg4?? (better is 30.Ne7 Qf6 31.Qd3+–) 30...Rg8 (30...Qd5 31.Qc4 c6 32.Qd5 cd5 33.Rd4–+) 31.Rg8?? (better is 31.Ne7 Qc2 32.Ka1=) 31...Qd5–+ 32.Ka1 Rg8 33.Rg8 Kg8 34.Qg4 (34.Qh2 Qd4 35.Kb1 Ne5–+) 34...Kh7 (better is 34...Kf8 35.d4 h5–+) 35.Qe2 (35.d4–+) 35...Qe5 36.Qe5 Ne5 37.d4 Nd3 38.Kb1 h5 39.Kc2 h4 40.Kd3 h3 41.Ke2 h2 42.Kf2 h1Q 43.Kg3 c5! 44.bc5 (44.dc5 bc5) 44...bc5 45.dc5 a6 (46.Kf4 Qc1 47.Kf5 Qc5 48.Kf6 Qf2 49.Ke5 Qb2 50.Kf4 Qa3–+; 45...Qg1 46.Kf3 Qc5 47.Ke4 Qa3 48.Kd4–+) 0–1. Q2QQ – Grigoropoulos24, Live Game Caissa's Web, 2004.

3.Nf3 e6 4.Bb2 (--> 2.Bb2 Bb7 3.Nf3 e6 4.a3).

3.Bb2

3.Bb2 (--> 2.Bb2 Bb7 3.a3).

3.Bb2 e6 4.e3 Nc6 5.Nf3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Nc6).

2.a4 Bb7

3.a5 e6 4.b5 c6 (4...ba5!? 5.Ra5 a6=+) 5.a6= Bc8 6.c4 cb5 7.cb5 d5 8.d4 Qd7 (8...Nf6 9.Ba3=) 9.e3+= Bb4 10.Bd2 Bd2 11.Qd2 Nf6 12.Nc3 0–0 13.Nf3 Ne4 14.Ne4 de4 15.Ne5 Qd5 16.Be2 (16.Qc2 Nd7 17.Bc4 Qd6 18.Qe4 Qb4 19.Ke2 Ne5 20.de5 Bd7+–) 16...Nd7 (16...f6 17.Nf3 Bd7+= (worse 17...ef3 18.Bf3 Qb5 19.Ba8+–)) 17.0–0?? (better 17.Nc6 Qg5 18.0–0+–) 17...Ne5–+ 18.de5?? (18.Qa2 Nd3 19.f3–+) 18…Qd2 (18...Qd2 19.Bg4 Qb2–+) 0–1. anonym1337 – JhengSipa, lichess.org, 2020.

3.Bb2 c6 (--> 2.Bb2 Bb7 3.a4 c6).

3.Bb2 e6 (--> 2.Bb2 Bb7 3.a4 e6).

3.Bb2 Nf6=.

3.b5 d6 4.d4 e6 5.Bf4 Be7 6.g4?? (6.e3!?=) 6...Nf6 (6...Bh1 7.e3–+) 7.h4?? (7.Nf3 a6 8.Nc3 Ng4–/+) 7...Ng4 8.Bg5?? Bg5 9.hg5 Qg5 10.Qd2?? Qd2 11.Kd2 Nf2 12.Rh2 Ne4 13.Ke3 Nf6 14.Bg2 Ng4 15.Kf4 Bg2 16.Rg2 Nf6 17.Rg7 Nbd7 18.Kf3 Ke7 19.Nc3 Rag8 20.Rg8 Rg8 21.Ne4 Ne4 22.Ke4 e5 23.d5? Nc5 24.Ke3 a5 25.Nf3 Nd7 26.Nh4 Nf6 27.Nf5 Ke8 28.Nh6?! Rg6 29.Rh1 Nd5 30.Kd3 Rg3 31.Kd2 Nc3 32.Nf5 Rg5 33.Ne3? Na4 34.Rh7 Rg1 35.Rh8 Ke7 36.Rc8 Kd7 37.Rf8 Ke7 38.Rc8 Rb1 39.Nf5? Ke6 40.Ng7 Kf6 41.Ne8 Ke7 42.Nc7 Kd7 43.Rf8 Kc7 44.Rf7 Kc8 45.Rf6 Rb5 46.Rd6 Nc5 47.Rc6 Kb7 48.Re6 a4 49.Re5 Nb3! 50.cb3 Re5 51.ba4 Re4 52.Kd3 Ra4 53.e3 b5 54.e4 b4 55.e5 b3 56.e6 b2 57.Kc2 Rb4 58.Kb1 Kc7 59.e7 Kd7 60.e8Q Ke8 61.Kc2 b1Q 62.Kc3 Qb3 63.Kd2 Qd5 64.Kc3 Rc4 65.Kb3 Qb5 66.Ka3 Ra4# 0–1. josueaurelino – zolnierze96, kurnik, 2012. (=1.a4 b6 2.b4)

3.b5 e6 4.e3 Qf6 5.Nc3 g6 6.Bb2 Bg7 7.Nf3 Qd8 8.Bc4 Nf6 9.0–0 0–0 10.d4 d5 11.Bd3 Re8 12.Ne2 c6 13.Ne5 Nfd7 14.f4 Ne5 15.fe5 cb5 16.ab5 a6 17.Nc3 ab5 18.Nb5 Ra1 19.Qa1 Bc6 20.Nd6 Re7 21.Rf3 Qc7 22.Qf1 Bf8 23.h4 Rd7 24.g4 Bd6 25.ed6 Qd6 26.h5 Qf8 27.hg6 hg6 28.Qh3 Qg7 29.g5 Rb7 30.Qg3 Nd7 31.Qd6 Ba4 32.Qb4 b5 33.Qd2 Nf8 34.Ba3 Nh7 35.Rg3 e5 36.Bc5 ed4 37.Bd4 Qf8 38.Qc3 Qb8 39.Bh8 Qg3 40.Kf1 Qf3 41.Ke1 Qe3 42.Kd1 Qg1 43.Kd2 Qg5 44.Kd1 Qg4 45.Kc1 Qf4 46.Kb2 Nf6 47.Qc8 Kh7 0–1. jura1946 – dc10air, kurnik, 2012.

3.c4 a5 4.Qb3 e6 5.Ba3 Nc6 6.d4 Nd4 7.Qd3 Nc6 8.Nf3 ab4 9.Bb2 f6 10.g3 Nh6 11.Bg2 Bd6 12.0–0 0–0 13.Nbd2 Na5 14.Nb3 Nb3 15.Qb3 c5 16.Nd2 Bc7 17.Bb7 Rb8 18.Ba6 d5 19.cd5 ed5 20.Bb5 Kh8 21.Nf3 d4 22.Qc4 Rf7 23.Bc1 Re7 24.Bh6 gh6 25.Nh4 Qg8 26.Nf5 Qc4 27.Bc4 Re5 28.Nh6 Rf8 29.Ng4 Rg5 30.h3 1–0. cymbalista – martenkaa91, kurnik, 2012.

3.c4 e6=+ 4.Bb2 f5 5.b5 Nf6 6.e3 Bb4 7.Nf3 d6 8.Be2 Qe7 9.0–0 e5 10.d4+= Nbd7 11.Qb3 Ba5 12.Bc3 Bc3 13.Nc3 a5 14.ba6 Ba6 15.a5 ba5 16.Ra5 Bb7 17.Rfa1 Ra5 18.Ra5 Bf3 19.Bf3 0–0 20.Nd5 Nd5 21.Bd5 Kh8 22.Ra7 Rb8 23.Qd3 ed4 24.ed4 Nf6 25.h3 Qe1 26.Qf1 Qc3 27.Qa1 Nd5 28.cd5 Qa1 29.Ra1 h5 30.Rc1 Rb4–/+ 31.Rc7 Rd4 32.Kf1 Rd5 33.Ke2 Kh7 (34.g3 Kg6–/+) 0–1. De Bouver,Guido – Kucharkowski,Jens, corr or01–009 E–mail, 2001.

3.c4 Nf6 4.d4 g6 (4...e5!? 5.b5 Bb4 6.Bd2 Bd2 7.Qd2 ed4 8.Qd4 0–0+=) 5.Nc3 Bg7 6.e3 d6 7.Bb2 c5 8.bc5 bc5 9.d5 Nbd7 10.Bd3 0–0 11.Nge2 Rb8 12.0–0 (12.Rb1!?=) 12...Bd5–/+ 13.Qc2 Ba8 14.h4 (14.Rab1 Ne5–/+) 14...h5 (14...Ne5 15.Rfb1–+) 15.f3 e6 16.Rab1 a6 17.g4? (better is 17.e4–/+) 17...hg4–+ 18.h5 (18.f4–+) 18...gf3 (worse is 18...gh5 19.f4–+) 19.Nf4 e5 20.Nh3 Nh5 21.Bg6 Qh4 22.Bh7 Kh8 23.Nf2 Qg3 24.Kh1 Qg2# 0–1. charcot – rukinson1 (1710), kurnik, 2012.

3.d4 d6 4.Nf3 e5 5.de5 de5 6.Qd8+– Kd8 7.Ne5 Bb4? 8.c3 Bc3 9.Nc3 Ke7 10.Bf4 Nc6 11.Nd5 Kf8 12.Nc7 Rc8 13.Nc6 Bc6 14.Nb5 Bb5 15.ab5 Rc2 16.Bd6 Ke8 17.Ra7 Rc8 18.Bc7 Ke7 19.Bb6 Kf6 20.Bd4 Kg6 21.e3 Nf6 22.Bd3 Kh6 23.Ke2 Nd5 24.Rf7 Nb4 25.Bg7 Kg5 26.h4 Kg4 27.Bf5 Kh5 28.g4 1–0. Fritz 8 – NN, 2004.

3.f3 e5 4.b5 d5 5.e3 Nf6 6.a5 ba5 7.Bb2 Bd6 8.Nc3 0–0 9.Ra5 d4 (Black gets strong initiative) 10.ed4 ed4 11.Nce2 c5 12.bc6 Nc6 (12...Qa5?? 13.cb7 Nc6 14.ba8R Ra8 15.Nd4+– (15.Bd4?! Nd4 16.Nd4 Bh2+–); 12...Bc6?! 13.Qa1=) 13.Ra4 Re8 14.Qa1 Qb6 15.Ba3 Nb4 16.Bb4 Bb4 17.Nh3 a5 18.Nhf4 Nd5 19.Kd1 Rad8 20.Nd3–/+ Bc6 21.Ra2 Bb5 22.Nd4 Bd3 23.Bd3 Nf4 24.Nf5–/+ f6 25.Bc4 Kh8 26.c3 Qc5 27.Ba6 Bc3 28.Qb1 Qf2 29.d4 Bd4 30.Rf2+/– Bf2 31.Kc2 1–0. guest488 – guest916, ICC, 2003.

3.Nf3 c5 4.bc5 bc5 5.Nc3 d5 6.Rb1 Bc6 7.Ne5 e6 8.e3 Bd6 9.d4 c4 10.Qg4 Be5 11.de5 g6 12.Qd4 Ne7 13.e4 0–0 14.Bg5 Re8 15.Be2 Qa5 16.Bd2 de4 17.Ne4 Qd5?? 18.Nf6+– Kh8 19.Qh4 h5 20.Qg5 Nf5 21.Nd5 Bd5 22.0–0 Nd7 23.Bc3 Kg7 24.Bh5 Rh8 25.Bg4 Nh4 26.Rfd1 Bg2 27.Rd7 Bf3 28.Qf6 Kh6 29.Bd2 (29...Kh7 30.Qf7#) 1–0. pierred – doktorb5, Yahoo, 2005.

3.Nf3 e6 4.c3 d5 5.a5 c5 6.e3 cb4 7.cb4 Bb4 (Better is 7...a6=+) 8.Qa4 Nc6 9.a6 Qc7 (9...Bc8 10.Bb5 Bd7 11.Bc6 Rc8 12.Qb4 Bc6+–) 10.ab7 Qb7 11.Bb5 Nge7 12.Qb4 0–0 13.Qa4 Na5 (13...a6 14.Ba6 Qc7 15.Qc2+–) 14.Bb2 a6 15.Bd3 Nec6 (15...f6+–) 16.Bh7! Kh7 17.Qh4 Kg8 18.Ng5 Rfc8 19.Ba3 Ne7 20.Qh7 Kf8 21.Qh8 1–0. kamret (2225) – cold_hearted, GameColony.com, 2003.

3.a5 ba5

4.ba5 e6 5.Bb2 Nf6 6.e3 Be7 7.c4 0–0 8.d4 d5 9.c5 c6 10.Nf3 Ne4 11.Bd3 f5 12.Nbd2 Bf6 13.0–0 Nd7 14.h3 (14.a6 Bc8 15.Qc2 Rb8+=) 14...e5 (14...Ndc5 15.a6 Bc8 16.Be2–/+) 15.Nh2?? (better is 15.de5 Be7 16.Nd4 Ndc5 17.a6 Nd3 18.ab7+=) 15...ed4–/+ 16.ed4 Ndc5! 17.Be4 fe4 18.g4?? Ne6 19.f4 Bd4 20.Bd4 Nd4 21.Ne4 de4 22.f5 e3 23.Qd3 Qd5 24.Ra4 c5 25.Nf3 Nf3 26.Rf3 Qd3 27.Rf1 0–1. dtpwaldi – piotr2306, kurnik, 2011.

4.ba5 g6 5.e3 Bg7 6.c3 e6 7.a6 Bc6 8.Nf3 d6 9.Nd4 Bd4 10.cd4 Nf6 11.Bb2 Nd5 12.Bc4 0–0 13.Bd5 (better is 13.0–0!?=) 13...Bd5+= (worse is 13...ed5 14.Nc3+=) 14.Nc3 Bg2 15.Rg1 Bh3?? (better is 15...Bc6–/+) 16.Qf3+– Nd7 17.Qh3 Rb8 18.Ba3 c5 19.Ne4 Qa5?! 20.dc5 Nc5 21.Nc5 dc5 22.e4 Rb5 23.Qc3 Qa6?? 24.Bb2 Rb2 25.Ra6 Rb1 26.Ke2 Rg1 27.Ra7 Rg2 28.h3 f5 29.e5 Rc8 30.Qf3 Rg5 31.Qb7 (31.Qb7 Rc7 32.Qc7 c4 33.Qd8#) 1–0. aleksandras19 – slabeusz1950, kurnik, 2011.

3.b5 g6

4.Bb2 f6 5.Nc3 d5=.

4.Bb2 f6 5.d4 Bg7 6.c4 d6 (6...Nh6 7.Nc3=) 7.d5+= Qd7 8.h3 e5 9.de6 Qe6 10.e3 Ne7 11.Nf3 0–0 12.Nd4 Qe4 (12...Qd7 13.Nc3=) 13.Qd3 (13.Nd2!? Qe5 14.N2f3 Bf3 15.Qf3+/–) 13...Qd3= 14.Bd3 Bg2 15.Rh2 Bb7 16.Nd2 Nd7 17.Ne6 Nc5 18.Nc5 dc5 19.0–0–0 a6 20.f3 ab5 21.ab5 f5 22.Rf2 Bb2 23.Kb2 Ra4 24.Kb3 Rfa8–/+ 25.Nb1 c6 26.Rb2 cb5 27.cb5? Nd5 Black intends f4 28.e4 Ne3 29.Re1 f4 30.Kc3 Rd4 31.Nd2 Rad8 32.Bc4? Nc4–+ 33.Nc4 Rd3 34.Kc2 Rf3 35.Re2 Rh3 36.e5 f3 37.Rf2 Rg3 38.Kb1 Rg2 39.Nd6 Rf2 40.Rf2 Bd5 41.Kc2 Kg7 42.Kc3 h5 43.Kd3 h4 44.Ke3 h3 45.Rh2 Rh8 0–1. 55aa55 – samtron01, kurnik, 2012.

4.Bb2 f6 5.g4?? Bg7 (5...Bh1 6.Nf3–+) 6.h4?? (6.Nf3 Nh6 7.h3 a6=) 6...e5 (6...Bh1 7.Nc3–+) 7.g5?? (better is 7.Nf3!?+=) 7...fg5 8.hg5?? Qg5 9.f4?? Qf4 10.Nh3?? Qg3 11.Nf2 Bh1 12.Nc3 Ne7 13.e4 d6 14.d4 0–0 15.de5 Qf2# 0–1. josueaurelino – mariuszmar, kurnik, 2012.

2.a4 e6

3.Bb2 (--> 1.b4 e6 2.Bb2 b6 3.a4).

3.e4 Bb4–/+ 4.Bb2 d5?? (better 4...Nf6–/+) 5.Bg7+– de4 6.Bh8 Nc6 (6...Bb7 7.Nc3+–) 7.Bb5 (7.c3 Bd6+–) 7...Bd7 8.Ne2 (better 8.Qe2 Nf6+–) 8...f6 (8...a6 9.Bc4+–) 9.Bg7 (better 9.Ng3 Qe7 10.c3 Ba5+–) 9...Qe7 10.Bc6 (10.Bh8 a6 11.Bc6 Bc6+–) 10...Bc6 11.Nd4 Qd7 (11...Qg7 12.Nc6 Qg2+–) 12.Nc6 (12.Qh5 Qf7 13.Qf7 Kf7 14.Nc6 Bd6+–) 12...Qc6 13.Qh5 Kd7 14.Qf7 Ne7 15.c3 Qc4 (15...f5 16.Bf6 Bc5 17.Qh7+–) 16.cb4 (better 16.Bf6 Bd6 17.Qh7+–) 16...Qc1 17.Ke2 Qh1 18.Bf6 Re8 19.Na3 (better 19.Qg7 Qh2 20.Nc3 Qd6+–) 19...Qg2 20.Be7 Re7 21.Qf4 Qg7?! (21...Ke8+–) 22.Rc1 c5 (22...Kc8 23.Qe4 Kb8 24.Nc4+–) 23.Qe4 Qb2 (23...Qg5 24.bc5 bc5 25.Qb7 Ke8 26.Qa8 Kf7 27.Rc3 Qg4 28.Kf1+–) 24.Qd3 (better 24.Rc3 Qb4 25.Qb7 Kd8 26.Qb8 Kd7 27.Rd3 Qd4 28.Qa7 Ke8 29.Qb8 Kf7 30.Rd4 cd4 31.Nc4+–) 24...Ke8 25.Rg1 The mate threat is Rg8 25...Qe5 26.Qe3 (26.Kf1 Qh2 27.Nc4 Qh5+–) 26...Qh5 27.f3 Qh2 28.Qf2?? (28.Kd1 Qh4 29.Qe5 (worse 29.bc5 bc5 30.Qc5 Qa4 31.Nc2 Qd7+–) 29...Qb4 30.Qb8 Kd7 31.Qa7 Ke8 32.Qa8 Kf7 33.Qg8 Kf6 34.Qh8 Kf5 35.Qf8 Ke5 36.Qe7 Qa4 37.Nc2 Kd5 38.Qd8 Kc6 39.Rg7 Kb5 40.Qe8 Kc4 41.Qa4 Kd5 42.Ne3 Ke5 43.Ng4 Kd5 44.Rd7) 28...Qe5= 29.Qe3 Threatening mate: Qxe5 29...Qb2?? (29...Qh2 30.Kd1 Qh5+–) 30.bc5 (30.Qe4 Kf7 31.Nb5 Qb4 32.Qh7 Ke8 33.Rg8 Kd7 34.Qd3 Qd4 35.Nd4 Kc7 36.Nb5 Kb7 37.Rb8 Kb8 38.Qd8 Kb7 39.Qe7 Kc6 40.Qd6 Kb7 41.Qc7 Ka6 42.Qa7) 30...Qb4 (30...Qf6 31.Nc4 Qh4 32.Rg4 Qh2 33.Kd3+–) 31.Rg4 (better 31.Rg8 Kf7 32.Qg1+–) 31...Qa5 (31...Qc5 32.Qf4 Kd7+–) 32.cb6 (32.Rg8 Kf7 33.Qg5 Qd2 34.Kd2 Rd7 35.Ke3 e5 36.Rg7 Ke6 37.Qh6 Kd5 38.Rd7 Kc5 39.Qd6) 32...Qa6 (32...Qb6 33.Rg8 Kd7 34.Qd3 Qd6 35.Qb5 Qc6 36.Rd8 Kd8 37.Qc6 Rg7+–) 33.Nb5 ab6 34.Kf2 (34.Rg8 Kf7 35.Qg5 Qb5 36.ab5 e5 37.Qg7 Ke6 38.Qh6 Kd5 39.Qc6 Kd4 40.Rd8 Rd7 41.Rd7) 34...Kf8 35.Qf4 Rf7 36.Qb8 (36.Qd6 Re7 37.Qd8 Kf7 38.Nd6 Kf6 39.Qh8 Rg7 40.Qg7) 36...Ke7 (36...Qc8 37.Qc8 Ke7 38.Qc7 Kf6 39.Qd8 Re7 40.Qh8 Rg7 41.Qg7 Kf5 42.Nd6) 37.Qd6 Kf6 38.Qd8 Re7 39.Qh8 Kf5 (39...Rg7 40.Qg7 Kf5 41.Nd6) 40.Nd4 (40.Nd6) 1–0. bolu – rimazu, net–chess.com, 2020.

3.b5 Bb7

4.Bb2 a5 5.e3 d6 6.Nf3 Nd7 7.d4 h6 8.Be2 g6 9.d5 e5 10.c4 Ngf6 11.0–0 g5 12.h3 Rg8 13.Nh2 Qe7 14.Ng4 Ng4 15.Bg4 Nc5 16.Nc3 Bg7 17.Qc2 Qf6 18.Ne4 Ne4 19.Qe4 Bf8? (better is 19...Qg6!? 20.Bf5 Qf6+/–) 20.f4+– gf4 21.ef4 Qe7 22.fe5 de5 23.Rae1 f6 24.Bh5 Kd7? 25.Qf5+– Kd8 26.Qf6 Qf6 27.Rf6 Bd6 28.Rh6 Bc8 29.Re5 Be5 30.Be5 Bh3 31.Bf6 Kc8 32.Rg6 Rg6+/– 33.Bg6 Bd7 34.Be4+– Kb7 35.d6 c6 36.bc6?? Bc6+= 37.Bf3 Bf3 38.gf3 Rf8?? 39.d7+– Kc7 40.d8Q Rd8 41.Bd8 Kd8 42.Kf2 (42.Kf2 Kd7 43.Ke3+–) 1–0. poganinbezdom – pac3, kurnik, 2012.

4.d4 c6 5.e3 cb5 6.ab5 (6.Bb5?? Bg2 7.Nf3 Bh1–+) 6...Bb4 7.c3 Be7 8.Nf3 a6 9.ba6 Ba6 10.Ba6 Ra6 11.Ra6 Na6 12.0–0 Nf6 13.Ne5 Bd6 14.c4 Be5 15.de5 Ne4 16.Qd4 (better is 16.Qg4!? Nac5 17.f3+–) 16...Nec5+= 17.Ba3 Qc7 18.Nc3 0–0 19.Nb5 Qc6 20.Nd6 Rd8 21.Qf4 Rf8 22.Bc5 Nc5 23.g4 (better is 23.Rd1!?+=) 23...Qe4?? (better is 23...f6=+) 24.Ne4+– (24...Nd3 25.Qg3+–) 1–0. igorA27 – grigoropoulo3, Live Game Caissa's Web, 2004.

4.e3 c6 5.c4 (5.Bb2 Nf6=) 5...a6 6.Nc3 ab5 7.cb5 cb5 (7...Nf6 8.Nf3=+) 8.Nb5= Bc6 9.Nf3 Bb5 (9...Nf6!?=) 10.Bb5+= Nc6 11.0–0 Qc7 (11...Nf6 12.Bb2+=) 12.Bb2 Nf6 13.d4 Be7 14.Qb3 Nd5 (14...0–0 15.Rfc1+=) 15.Bc6 (15.Rac1 Qd6+/–) 15...Qc6 (15...dc6 16.e4 Nf4 17.d5 cd5 18.Bg7+=) 16.Rfc1+/– Qb7 17.Ne5 (17.e4 Nf6 18.e5 Nd5+=) 17...0–0+= 18.Ba3 Ba3 19.Qa3 Rac8 (19...Rfc8 20.Nc4=) 20.Rc8 (20.Qd6 Nc3 21.Kh1 Rc7+=) 20...Rc8= 21.Rc1 Rc1 22.Qc1 g6 (22...f6 23.Nc4=) 23.g3 (23.Qc2 d6 24.Nc6 f5=) 23...d6 24.Qc6 (24.Nc6 Qc7 25.e4 Nb4=) 24...Qc6 25.Nc6 Kf8 26.e4 (26.h3 Nc3=) 26...Nc7 (26...Nc3 27.f3–/+) 27.Nd8 (27.f3 Ke8+=) 27...Ke8 (27...b5 28.ab5 Nb5 29.Nc6=) 28.Nb7 d5 (28...Kd7 29.e5 de5 30.de5=) 29.e5 Kd7 30.Kf1 Kc6 (better is 30...Ne8!? 31.a5 Kc6=) 31.Nd8+/– Kd7 32.Nf7 Ke7 (32...b5 33.a5+/–) 33.Ng5 (33.Nd6!? Kd7+–) 33...h6 (33...b5 34.a5 b4 35.Ke2+/– (35.Nh7?? b3–+)) 34.Nf3 g5 35.Nd2 Kf7 36.Ke2 Ke7 37.g4 Kd7 (37...Kf7 38.Ke3+–) 38.f3 (38.Ke3 Na6+–) 38...Kc6 (38...b5 39.ab5 Nb5 40.Ke3+–) 39.h3 (39.Ke3 b5 40.ab5 Nb5+–) 39...Kb7 (39...Na6 40.Ke3 Nb4 41.f4 gf4 42.Kf4 Nd3 43.Kg3+–) 40.Nf1 (better is 40.Ke3+–) 40...Ka6+= 41.Ng3 (41.f4 gf4 42.h4+/–) 41...Ka5= 42.Nh5 Ka4 43.Kd2 (43.f4 b5 44.f5 b4+=) 43...Kb4 (better is 43...b5 44.f4 b4=) 44.Kc2?? (better is 44.f4 Kc4 45.Ke3 gf4 46.Nf4=) 44...Kc4–+ 45.Kb2 (45.Nf6 Nb5 46.Nd7 Nd4 47.Kd2 b5 (47...Nf3 48.Ke3 Ng1 49.Nb6 Kc3 50.Nd5 ed5 51.e6 d4 52.Kf2–/+) 48.Nb6 Kb3–+) 45…Kd4 (46.Nf6 Ke5–+) 0–1. kamera (1650) – rockys, GameColony.com, 2002.

2.Bb2 a5

3.a3 f6 4.b5+= e5 (4...Bb7 5.e3+=) 5.Nf3 (5.e4 Bb7 6.Nc3 f5+–) 5...d5+= 6.e3 e4 (6...Bc5 7.c4 d4 8.Bd3+=) 7.Nd4+– Bb7 (better 7...Bc5!? 8.c4 Ne7 9.cd5 Bd4 10.Bd4 Nd5+–) 8.c4+– f5 (8...dc4 9.Bc4 Qd6 10.a4+–) 9.Nc3 g6?? (9...Nf6+–) 10.Ne6 Qe7 11.Nd5 Bd5 12.cd5 (12.Bh8 Be6 13.d4 Nd7–+) 12...Bh6 (12...Nf6 13.Bf6 Qf6 14.Nc7 Kd8 15.Na8+–) 13.Bh8 Nf6 (13...Ra7+–) 14.Bf6 Qf6 15.Nc7 Kf7 16.Na8 Bg7 17.Rc1 Qd6 18.Rc7 Kf6 19.Qa1 Kg5 20.h4 Kg4 (20...Kh6 21.Qg7 Kh5 22.Be2) 21.Be2 1–0. Pierre – Trotzig, internet, 2020.

3.ba5 ba5 4.e4 h5 5.Nf3 g6?? (better is 5...Nc6+=) 6.Bh8+– Nf6 7.Bf6 ef6 8.Bc4 Ba6 9.Qe2 Bc4 10.Qc4 Qe7 11.0–0 Bh6 (11...Qc5 12.Qc5 Bc5 13.d4+–) 12.Qc7 Qe4 (12...d6 13.Qc3 Bf4+–) 13.Re1 Qe6 14.Re6 fe6 15.Nc3 (15.Nc3 Nc6 16.Ne4+–) 1–0. pittol – parmis, gameknot.com, 2014.

3.ba5 Ra5 (--> 1.b4 a5 2.ba5 Ra5 3.Bb2 b6).

3.e3 ab4 4.a3 c5 5.ab4= Ra1 6.Ba1 cb4 7.Qg4 Nc6 (7...Qc7!? 8.Qb4 Qc2 9.Qb6 Qc1 10.Ke2 Nc6=) 8.Bg7+= d5?? (better 8...Nh6 9.Bh6 Bh6+=) 9.Qg3+– b3 (9...Bg7 10.Qg7 Nf6 11.Qh8 Kd7 12.Qg7+–) 10.cb3 (10.Bh8?? bc2 11.Bd3 c1Q 12.Ke2 Nh6–+) 10...Nb4 (10...Bg7 11.Qg7 Bf5 12.Qh8+–) 11.Bh8 Nh6 12.Nf3 (12.Bc3 Nc6+–) 12...Nf5 (12...e6 13.Bc3+–) 13.Qf4 (better 13.Qg8 Qc7 14.Bc3 Nh6+–) 13...f6 (13...e6+–) 14.Qb4 e5 (14...Kf7 15.Qg4+–) 15.Qa4 (15.Qg4 Kf7+–) 15...Kf7 16.Bb5 (better 16.g4 Ng7+–) 16...Kg8 17.Bf6 (17.Ne5 Qc7 18.Bf6 Qc1 19.Ke2 Qh1+–) 17...Qf6 18.Nc3 (18.Bd7 Bb7+–) 18...Be6 19.Bd7 e4 (19...Bf7 20.Qg4 Ng7 21.Qg5 Qg5 22.Ng5+–) 20.Qc6 ef3 (20...Nd6 21.Be6 Qe6 22.Ng5+–) 21.Be6 (better 21.Qe6 Kg7 22.Qf5 Qf5 23.Bf5 d4+–) 21...Kh8 22.gf3 Nh4 (22...d4 23.Nd5 Qh6 24.Qb6+–) 23.Bd5 (23.Bd5 Qg6 24.Qg6 Ng6 25.Bc4+–) 1–0. FeegLood (2645) – whatismindgam3 (2395), lichess.org, 2018.

3.a3 ab4 4.ab4 Ra1

5.Ba1 Bb7 6.Nf3 Nc6 7.b5 White fights for the Initiative 7...Na5 8.e3 Qa8 9.Be2 Nb3 10.cb3 (10.Bb2!? Nc5 11.0–0+=) 10...Qa1= 11.0–0 e6 12.Qc2 Bf3 (12...Bd6 13.d4=) 13.Bf3+= Qa5 (better 13...Bd6!?+=) 14.Qc7+– Be7 (14...Qb5 15.Nc3 Qc5 16.Qb8 Ke7 17.Na4+–) 15.Qb8 (15.Nc3 Nf6 16.e4 Bd8+–) 15...Bd8+– 16.Nc3 Ne7 17.Ne4 (17.Rb1 Qb4+–) 17...0–0 (better 17...Nf5+–) 18.Qg3?? (better 18.Nd6 Qb4 19.Nb7+–) 18...Ng6 (18...Qb5 19.Nc3 Qd3 20.Rd1=) 19.Be2 d5 20.Ng5 (better 20.Nc3!?=) 20...Qd2–/+ 21.Qh3?? (better 21.Bd1–/+) 21...Bg5–+ 22.Bf3 Bf6 23.e4 (23.Rd1 Qc2–+) 23...Nf4 24.Qg4 de4 (better 24...h5!? 25.Qg3–+) 25.Be4 (25.Rd1 Qc3 26.Be4 Qe5–+ (26...Qb3?! 27.Rb1 Nh3 28.Qh3 Qh3 29.gh3–/+)) 25...h5 (25...Rd8 26.Kh1–+) 26.Qf3 e5 (26...Rd8 27.Kh1–+) 27.Rd1 (27.Kh1–+) 27…Ne2 (27...Ne2 28.Qe2 Qe2–+) 0–1. aravind555 (1620) – erouge, lichess.org, 2019.

5.Ba1 Bb7 6.Nf3 Bf3 7.ef3 Nf6 8.b5 e6 9.c4 Be7 10.Nc3 0–0 11.Bd3 c6 12.0–0 cb5 13.Nb5 d5 14.Qe2 dc4 15.Bc4 Nc6 (15...Nd5!?=) 16.Be6+– fe6 (better 16...Bb4!? 17.Qc4 Bc5+–) 17.Qe6+– Kh8 18.Qc6 Qd5 (18...Qd2 19.Qb6 Rd8 20.Bc3+–) 19.Nd4 Qc6 20.Nc6 Bc5 21.Re1 h5 (21...Rc8 22.Na7 Ra8 23.Nb5+–) 22.Bb2 Nd5 (22...Rc8 23.Ne5+–) 23.Re5 Kh7?? (23...Nf6+–) 24.Rh5 Kg6 (24...Kg8 25.Rd5 Re8 26.Ne5+–) 25.Rd5 (25.Rd5 Re8 26.Ne5 Kh7 27.d4+–) 1–0. Janek – Lqq6g, internet, 2019.

5.Ba1 c5 6.b5 (6.bc5 bc5 7.e3 d5=) 6...d5 (6...Nf6 7.Nf3=) 7.e3 Nf6 8.Bf6 (8.Nf3 Bf5=) 8...ef6 9.d4 (9.Nf3 Bd6=) 9...c4 10.c3 (10.Qf3 Bd6=) 10...Bf5 (10...Qd7 11.e4=+) 11.g4 (11.Nd2!?=) 11...Bg6 (11...Bd7 12.Bg2 Bb5 13.Nh3=+) 12.Bg2 (12.h4=+) 12...Be7 (12...Qd7 13.Nd2 Qb5 14.Qf3=) 13.h4 (better is 13.Nd2 Qd7 14.Ne2 Qb5 15.Nf4=) 13...Nd7?? (better is 13...Qd7–/+) 14.Bd5+/– Qc7 (14...Bd3 15.Nd2+/–) 15.Nd2+– Bd6 16.h5 Bd3 17.Qf3 0–0+/– 18.Ne2 Qa7 19.0–0 Qa4+= 20.Nc4?? Bc4–/+ 21.Rc1 Qb5–+ 22.Bc4 Qc4 23.Kg2 h6 24.Ng1 b5 25.Qd1 Re8 26.Nf3 Qd5 27.Kf1 f5 28.g5 hg5 29.Ng5 f4 30.Qg4 fe3 31.Re1 Qh1 32.Qg1 e2! 33.Re2 Qg1 34.Kg1 Re2 35.Kf1 Re8 36.Kg2 Nf6 37.Kf3 Nd5 38.Ne4 Re4! 39.Ke4 Nc3 40.Kd3 Nd5 41.Ke4 Ne7 42.Kd3 Kh7 43.f3 Kh6 44.f4 f5 45.Kc3 Kh5 46.Kb3 Kg4 47.Kc3 Kf4 48.Kd3 Nd5 49.Kc2 Ke4 50.Kb3 Kd4 51.Kb2 Kc4 52.Kc2 f4 53.Kd2 g5 54.Ke2 g4 55.Kf2 Kd3 56.Kg2 Ke2 57.Kh2 f3 58.Kh1 f2 59.Kg2 f1Q 0–1. bentengutama (1955) – steamer (2650), net–chess.com, 2003.

5.Ba1 e6 6.b5 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.a4 ab5 5.ab5 Ra1 6.Ba1 b6).

5.Ba1 Nf6 6.Nf3=.

3.b5

3.b5 (--> 1.b4 a5 2.b5 b6 3.Bb2).

3.b5 Bb7 4.a4 (--> 1.b4 a5 2.b5 b6 3.a4 Bb7 4.Bb2).

3.b5 Bb7 4.e3 (--> 1.b4 a5 2.b5 b6 3.e3 Bb7 4.Bb2).

3.b5 Bb7 4.Nf3 e6 5.e3 (--> 1.b4 a5 2.b5 b6 3.e3 Bb7 4.Bb2 e6 5.Nf3).

3.b5 c5 4.e3 Bb7 (--> 1.b4 a5 2.b5 b6 3.e3 Bb7 4.Bb2 c5).

3.b5 c6 4.a4 cb5 5.ab5 (--> 1.b4 a5 2.b5 c6 3.a4 cb5 4.ab5 b6 5.Bb2).

3.b5 c6 4.c4 cb5 5.cb5 (--> 1.b4 a5 2.b5 c6 3.c4 cb5 4.cb5 b6 5.Bb2).

2.Bb2 a6

3.a3 e6 4.c4 c5 5.bc5 Bc5?? (5...bc5 6.e4=) 6.e3 (better is 6.Bg7 Bd4 7.Bd4+–) 6...Nf6= 7.d4 Be7 8.Nf3 d6 9.Bd3+= Nbd7 10.Nbd2 Bb7 11.0–0 Bf3 12.Nf3 e5 13.de5+– de5 14.Be4?? Ne4–+ 15.Qd2?? Nd2 16.Be5 Nf3 17.gf3 Ne5 18.Rfd1 Qc7 19.Rd7 Qd7 20.Rd1 Qd1 21.Kg2 Qf3 22.Kg1 Bh4 23.h3 Qf2 24.Kh1 Nf3 25.e4 Qg1 (25...Qf1) 0–1. Fournier,Frederic (1875) – laetizia (1955), Active (1/0), 2004.

3.a4 c5 4.b5 (4.bc5 bc5 5.e4 e6+=) 4...a5 (4...d5 5.Nf3=) 5.e3 (5.e4 Bb7 6.Nc3 e6+=) 5...d5= 6.Nf3 Bb7 (6...Nf6 7.Be2=) 7.c4 (7.d4 cd4 8.ed4 e6+=) 7...d4 (7...e6!?=) 8.ed4+– cd4 9.Bd4 Nd7 10.Be2 (10.Nc3 Ngf6+–) 10...Ngf6 (10...Rc8 11.Qb3+–) 11.0–0 Ne4 (11...e6!?+–) 12.d3+– Nec5 13.Re1 (13.Nbd2 Rc8+–) 13...e6 14.Nbd2 Qe7 (14...Qc7 15.Bb2+–) 15.Ne5 (15.Be3 Qf6+–) 15...Ne5 (15...Rd8 16.Nef3+–) 16.Be5 Nd7 (16...0–0–0 17.d4 Nd7 18.Bg3+–) 17.Nf3 (17.Bc3!? 0–0–0+–) 17...Ne5+– 18.Ne5 Qf6 19.Bf3 Bf3 20.Qf3 (20.gf3?! Bd6 21.Qe2 Rd8=) 20...Rc8?? (better 20...Qf3 21.Nf3 Rc8+–) 21.Qb7+– Qd8 (21...Rd8 22.Qc6 Ke7 23.Qb6 Ke8 24.Qc6 Ke7+–) 22.Qf7 1–0. DEFFM – Discanto, freechess.org, 2018.

3.c4 Bb7 (--> 2.Bb2 Bb7 3.c4 a6).

3.c4 c6 4.d4 (4.e4 e6=) 4...e6 5.c5 (5.a3 d5=) 5...b5 (5...a5!?=) 6.a4+= Nf6 (6...d6 7.ab5 cb5 8.e4+=) 7.ab5 (7.Nd2 ba4 8.e4 Be7+=) 7...cb5= 8.e3 Nc6 9.Bc3 Ne4 (9...Bb7 10.Nf3=) 10.Bb5+= Nb8? (better is 10...Nc3 11.Nc3 Nb4+=) 11.Bd3+– Nc3 (11...Bb7 12.Nf3+–) 12.Nc3 a5 (12...Bb7 13.Nf3+–) 13.ba5 Ra5 14.Nge2 Ra1+/– 15.Qa1 Nc6 16.0–0 Nb4 17.Bb5 Bb7 18.Rb1 Nd5 19.Nd5 ed5? 20.Qa7 Ba8 21.Bd7! Qd7 22.Qa8 Qd8 23.Qc6 Qd7 24.Rb8 Ke7 (25.Rb7 Qb7 26.Qb7 Kd8 27.c6 Bd6 28.Qd7). chessforces (1800) – bertjosh, net–chess.com, 2001.

3.c4 e5 4.a3=.

3.e3 Bb7 (--> 2.Bb2 Bb7 3.e3 a6).

3.Nf3 Bb7 (--> 2.Bb2 Bb7 3.Nf3 a6).

2.Bb2 Ba6

3.a3 e6 4.d3 Nf6 5.c4 Be7 6.Nf3 (6.e4 d5=) 6...0–0 7.g3 h6 (7...c5 8.bc5 Bc5 9.Bg2=) 8.Bg2 d5 9.cd5 Nd5 (9...ed5 10.0–0=) 10.Nc3 Nc3 11.Bc3 Nc6 (11...Bb7 12.0–0=) 12.0–0+= Bb7 13.Qb3 Bf6 14.Qb2 Bc3 15.Qc3 Ne7 16.Rac1 Bf3 (16...Rc8 17.d4+=) 17.Bf3+/– (worse is 17.ef3 Rc8+=) 17...Nf5? (17...Nd5 18.Qc6+/–) 18.Qc7 (18.Ba8 Qa8 19.e4 Ne7 20.Qc7 Ng6+–) 18...Qf6? (18...Nd4 19.Kg2 Rc8 20.Qa7 Nf3 21.Rc8 (21.ef3?! Ra8 22.Qb7 Ra3+=) 21...Qc8 22.ef3+/–) 19.Qc3?? (better is 19.Ba8!? Ra8 20.Rfe1 Qb2+–) 19...Rac8 20.Qf6 gf6 21.e3 Rc1 22.Rc1 a5 23.ba5 ba5 24.a4 Rd8 25.d4 Nd6 26.Rc5 Nb7 27.Bb7 e5 28.Rc8 Rc8 29.Bc8 ed4 30.ed4 Kf8 31.f4 Ke7 32.Kf2 Kd6 33.Ke3 f5 34.Bf5 f6 35.Ke4 Kc6 36.g4 Kd6 37.h4 Kc6 38.g5 fg5 39.fg5 hg5 40.hg5 Kd6 41.g6 Ke7 42.Ke5 Kf8 43.Kf6 Kg8 44.d5 Kf8 45.d6 Ke8 46.g7 Kd8 47.g8Q 1–0. Fournier,Frederic – solrac80, Active, 2007.

3.b5 Bb5=+ 4.a4 (4.Nc3 Bc6–/+) 4...Ba6 (4...Bc6 5.a5–/+) 5.Nf3=+ e6 6.e3 Bf1 7.Kf1 Nf6 8.g3 (8.Nc3 Be7–/+) 8...Be7 9.Kg2 0–0 10.c4 h6 (10...c5 11.Nc3–/+) 11.d4 Nh7 (11...Nc6 12.d5 Na5 13.Qd3–/+) 12.Nc3 Bf6 (12...Nc6 13.e4–/+) 13.Nd2 d6 14.Qf3 Nd7 (14...Na6 15.a5–/+) 15.Nde4 c5 16.Nd6 (better 16.Nb5=+) 16...Qc7 (better 16...cd4!? 17.ed4 Bd4–/+) 17.Ndb5 (17.Ncb5 Qd8=) 17...Qb8 18.Ne4 Qd8 (18...a6 19.Na3=) 19.Rad1 (19.a5+=) 19...Be7 (19...a6!? 20.Nbd6 Qc7=) 20.dc5+– bc5 21.Qg4 Threatening mate... how? 21...Qe8?? (better 21...Ng5 22.Ng5 hg5+–) 22.Qg7 1–0. BeepBeepImAJeep (2640) – sivre (1705), lichess.org, 2016.

3.d3 d5 4.f3 e6 5.e4 (better is 5.a3!?+=) 5...Bb4–/+ 6.Nd2 Nc6?? (better is 6...d4–/+) 7.Bg7+– Qg5 (7...Bc3 8.Bc3 d4+–) 8.Bh8 Nd4 (8...Qe3 9.Ne2 de4 10.fe4 0–0–0+–) 9.Bd4 1–0. Jokmin,Alex – Rellias Jr.,Paul, RN–2010–0–00320, 2010.

3.d3 Nf6 4.g3 e5 5.Bg2 d6?? (better 5...d5 6.Be5 Bb4 7.c3 Be7=) 6.Ba8+– Nbd7 7.Bc6 Be7 8.b5 Bc8 9.a4 0–0 10.Nf3 Nc5 11.e4 Bg4 12.Nbd2 Ne6 (12...Bd7 13.Bd7 Qd7 14.0–0+–) 13.c4 (13.h3 Bh5+–) 13...Nc5 14.Qc2 h6 (14...Bd7 15.Bd7 Qd7 16.a5+–) 15.h3 Be6 16.Nh4 (16.a5 Bd7+–) 16...Qc8 17.g4 (17.a5 Bh3 18.f4 Nh5+–) 17...g5 (17...Nfe4 18.Ne4 Bh4 19.a5+–) 18.Ng2 Rd8 19.f3 d5 (19...a5 20.h4+–) 20.cd5 Bd7 (20...Nd5 21.ed5 Bd5 22.Bd5 Rd5 23.Ra3+–) 21.Ne3 (21.Be5 Bc6 22.bc6 Nd5 23.ed5 Rd5+–) 21...Bc6 22.bc6 Bd6 23.Nf5 Kh7 (23...Bf8 24.Be5 Nd5 25.ed5 Rd5 26.d4+–) 24.Nc4 Ne8 (24...Ng8 25.h4 gh4 26.Ne5+–) 25.Be5 (better 25.h4!? gh4 26.Rh4 Bf8+–) 25...Be5 26.Ne5 Nd6 27.Nd6 cd6 (27...Rd6 28.d4 Qe8 29.h4 gh4 30.a5+–) 28.Nf7 Rf8 29.Nd6 Qc7 30.Nf5 (30.e5!? Kh8 31.d4 Qg7+–) 30...Rf5 31.gf5 Qf4 32.Qe2 (32.Ke2!? Na6+–) 32...Nb3 33.Rb1 Nd4 34.Qf2 Nf3 35.Ke2 Qd2 36.Kf3 Qd3 37.Qe3 (37.Qe3 Qc4 38.a5+–) 1–0. alessandrocarvalhaes (1805) – dontcryforchess (1850), lichess.org, 2020.

3.e3 Bf1 4.Kf1 d5 5.c4 (5.a3 e6=) 5...Nf6 (5...dc4 6.Qg4 Qd3 7.Ne2=+) 6.cd5 (6.Qf3 e6=) 6...Nd5 7.Nf3 (7.a3 a5=) 7...Nf6 (7...Nb4!? 8.Qa4 N4c6=+) 8.Nc3 (8.Bf6 ef6 9.Qc2 Qe7+=) 8...e6= 9.g3 Be7 (9...c6 10.a3=+) 10.Kg2= Nbd7 11.Re1 (11.b5 a6=) 11...Rc8 (11...Bb4 12.Qa4 c5 13.d4–/+) 12.d4 (12.Qa4 0–0=) 12...c6 (12...Bb4 13.Qa4 a5 14.a3 Bc3 15.Bc3–/+) 13.Qc2 (13.a3 0–0=) 13...0–0 (13...Bb4 14.e4–/+) 14.Ne4? (better 14.a3!?=) 14...Ne4–/+ 15.Qe4 Bd6 (15...Bb4!? 16.Rec1 Nf6–/+) 16.Rec1 (16.a3 Nf6 17.Qd3 Be7=) 16...Qe7 (16...Nf6 17.Qc2=+) 17.Rc6= f5 (better 17...Nf6 18.Qc2 Rc6 19.Qc6 Bb4=) 18.Rc8?? (18.Qc2 Rc6 19.Qc6 Nb8+=) 18...Rc8 (better 18...fe4 19.Rf8 Qf8–+) 19.Qd3 (19.Qb7 Rc2 20.Bc1 Nf6 21.Qe7 Be7+–) 19...Nf6 (19...Bb4!? 20.d5 Nc5=) 20.a3+= Ne4 21.Ne5 Qg5 (21...Be5 22.de5 Qb7 23.f3+–) 22.f4 (22.Rc1 Rc1 23.Bc1 Qh5+–) 22...Qh5 23.d5 (better 23.Rc1 Rc1 24.Bc1 Be5 25.de5+=) 23...ed5?? (23...Nf2 24.Qd2 (worse 24.Kf2 Qh2 25.Ke1 Qb2–/+) 24...Ne4 25.Qd3=) 24.Qd5 (better 24.g4 Qe8 25.Qd5 Kf8 26.gf5 Rc2 27.Kg1 Rb2 28.Qe4+–) 24...Kh8?? (better 24...Kf8 25.Qd3 Be5 26.Be5 Qf7+=) 25.Nf7+– Kg8 Threatening mate... how? 26.Nd6 Kh8 27.Nc8 (better 27.Bg7 Kg7 28.Qe5 (28.Nc8?! Qe2 29.Kg1 Qf2 30.Kh1 Qf3 31.Kg1 Qf2 32.Kh1 Qf3 33.Kg1 Qf2=) 28...Kf8 29.Qh8 (29.Nc8?! Qe2 30.Kg1 Qf2 31.Kh1 Qf3 32.Kg1 Qf2 33.Kh1 Qf3 34.Kg1 Qf2=) 29...Ke7 30.Nc8 (30.Qc8?! Qe2 31.Kg1 Qf2 32.Kh1 Qf3 33.Kg1 Qf2 34.Kh1 Qf3 35.Kg1 Qf2=) 30...Kd7 31.Kg1+–) 27...Qe2= 28.Kh1 Threatening mate: Qd8 28...Qf3 29.Kg1 Qf2 30.Kh1 Qf3 31.Kg1 Qf2 32.Kh1 Qf3 ½–½. RichardSommer (2010) – BlackMonck (2035), lichess.org, 2020.

3.Nf3 Nf6 4.d3 Nc6 5.a3 e6 6.c4 Bb7 7.Nbd2 Be7 8.e4 0–0 9.b5 (9.Be2 a6+=) 9...Na5= 10.Be2 d6 11.Bc3 e5 12.Ba5 White gets the initiative 12...ba5 13.Nb3 c6 14.Qd2 a4 (14...cb5 15.cb5 a4 16.Na5 Be4 17.0–0=+) 15.bc6 (15.Na5 Qc7+=) 15...Bc6= 16.Na5 Ng4?? (better 16...Bd7=) 17.Nc6+– Qb6 (17...Qd7 18.Ne7 Qe7+–) 18.Ne7 Kh8 19.0–0 Qd8 20.Nd5 h5 (20...Nf6 21.Rab1+–) 21.Ne3 (21.d4 Rc8+–) 21...Nf6 (21...Rb8 22.Rfb1+–) 22.Nf5 g6 (22...Kg8+–) 23.Qh6 Nh7 (23...Kg8 24.Qg7) 24.Qg7 1–0. aravind555 – LuckyYouYes, lichess.org, 2017.

3.g3 Nc6 4.a4 (4.Bg2!?=) 4...Nb4–/+ 5.Ba3 (5.Bg2 c6–/+) 5...Nc6 6.e3 (6...Bf1 7.Kf1–/+) –/+. Tiedemann,Marcel – Rauschenberger,Sabrina, remoteschach.de, 2002.

3.Nh3 Nc6 4.a3=.

3.Nh3 e6 4.e3 (4.a3 Nf6=) 4...Bf1 (4...Bb4 5.Bg7 Bd2 6.Nd2 Bf1 7.Rf1+–) 5.Rf1 Bb4?? (better is 5...d5=) 6.Bg7+– Bd6 7.Bh8 Bh2 (7...Nc6 8.Rh1+–) 8.g3 f6 9.Qh5 Ke7 10.Qh7 Kd6 11.Nc3 Nc6 12.Ne4 Ke5 13.Qh5 (13.Qh5 Ke4 14.d3#) 1–0. pierre – ames3pack, internet, 2008.

3.Nh3 Nf6 4.c4 Bc4 5.Qc1 d5 6.d3 Bb5 7.e4 (7.a4 Bd7–/+) 7...e6 8.f3 (better is 8.e5!? Nfd7 9.a3–/+) 8...Bb4 9.Kf2 (better is 9.Bc3 c5 10.Qg5–+) 9...de4 10.fe4 (10.Qg5 Bc5 11.Ke1 ef3 (11...ed3?! 12.Qg7 Rg8 13.Qf6=; 11...Bd3 12.Qg7 Bb4 13.Kf2 e3 14.Kg1–+) 12.Qg7 Rg8 13.Qf6 fg2 14.Qd8 Kd8 15.Bf6 Ke8 16.Bg2 Rg2–+) 10...Bd3 11.Bd3 (11.Ng5 Bc5 12.Kg3 Be4–+) 11...Qd3 12.g4 (12.Bf6 Bc5 13.Ke1 Qe4 14.Kf1 Qd3 15.Ke1 gf6 16.a3–+) 12…Ne4 (13.Kg1 Bc5 14.Nf2 Nf2 15.Qc5 Nh3 16.Kg2 Nf4 17.Kf2 bc5–+) 0–1. bob – 951951, Live Game Caissa's Web, 2004.

3.a4 b5

4.a5 Nc6 5.e3 (5.c3 Nf6=) 5...Nb4=+ 6.Nc3 c6 7.Na2 Nd5 (7...Qa5? 8.Nb4 Qb4 9.Bc3+–) 8.e4 Nf4 9.Qf3 Ne6 10.Nb4 Bb7 11.Nh3 c5 (11...a6 12.Be2=+) 12.a6= Bc6 13.Nc6 dc6 14.e5 Nd4?? (better 14...Rc8=) 15.Bd4+– Qd4 (15...Qc7 16.e6 0–0–0+–) 16.Qc6 Kd8 17.Qa8 Kd7 18.Bb5 (18.Qf8?! Qa1 19.Ke2 Qe5 20.Kd1 Qa1 21.Ke2 Qe5 22.Kd1 Qa1 23.Ke2 Qe5=) 18...Ke6 19.Ra4 (19.Qf8?! Qa1 20.Ke2 Qe5 21.Kf3 Qh5 22.Kg3 Qg6 23.Kf4 Qf5 24.Kg3 Qg6 25.Kh4 Qh6 26.Kg3 Qg6=) 19...Qe5 20.Re4 (20.Re4 Kf6 21.Re5+–) 1–0. Janek – zandar, internet, 2017.

4.a5 e6 5.e3 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.Qf3 (6.Nc3 Bb4 7.Nb5 c6=+) 6...c6 (better 6...Nc6!?–/+) 7.Qg3= Bb4?? (better 7...Qe7=) 8.Qg7+– Rg8 9.Qf6 Qf6 10.Bf6 Rg6 (10...Be7 11.Be7 Ke7 12.Nf3+–) 11.Bb2 d6 (11...d5+–) 12.c3 Bc5 13.d4 Bb6 (13...Nd7 14.Nd2+–) 14.ab6 ab6 15.Nd2 d5 (15...Ke7 16.g3+–) 16.Nh3 h6 17.Nf4 Rf6 (17...Rg8 18.Bd3+–) 18.Bd3 Nd7 19.Nf3 c5 (19...h5 20.Nh5 Rh6 21.Nf4+–) 20.Bb5! cd4 (20...Bb5 21.Ra8 Pinning (21.Ra8 Deflection)) 21.cd4 Ke7 22.Ba6 Nb8 23.Ba3 Kd8 24.Bd3 Nc6 25.Be7! Ne7 (25...Ne7 26.Ra8 Discovered attack; 25...Ke7 26.Ra8 Discovered attack) 26.Ra8 Kc7 27.Ra7 Kd6 28.Ne5 (28.Ne5 Rf4 29.Rd7) 1–0. Pindear – Fiver, internet, 2019.

3.a4 Bb7

4.b5 a6 5.e3 ab5 6.ab5 Ra1 7.Ba1 d5 8.Nf3 Nd7 9.c4 c6 10.bc6 Bc6 11.cd5 Bd5 12.Nc3 Bc6 13.Bb5 Qc8 14.0–0 e5 (14...Ngf6 15.Qe2+=) 15.Qb3+– Ne7?? (better 15...Bf3 16.gf3 Ngf6+–) 16.Ng5+– Bb5 (16...Nc5 17.Qf7 Kd7+–) 17.Qf7 (17.Qb5?! f6 18.Ne6 Qc6+=) 17...Kd8 18.Ne6 1–0. DEFFM – Discanto, freechess.org, 2018.

4.Nf3=.

3.a4 c6

4.d3 d5 5.Nc3 e6 6.b5 cb5 (6...d4 7.ba6 Bb4 8.e4+=) 7.ab5= Bb7 8.Ba3 Ba3 9.Ra3 Ne7 (9...d4 10.Ne4+=) 10.Qa1 0–0 11.Ra7 Ra7 12.Qa7 Qc8 13.Kd2 (13.Nd1!?=) 13...d4+= 14.Nd1 Bd5?? (better is 14...Qc7!?+=) 15.Qb6 Nd7? 16.Qd4+– Nf5 17.Qa1 Qc5? 18.Qb2 Nb6 19.e4 Be4 20.de4 Rd8 21.Kc1 Nd4 22.Bd3 Ra8 23.Nc3 Ra3?? 24.Nge2?? Ra8?? 25.Kd2 Qg5 26.f4 Qg2 27.Rg1?? Qh2?? 28.Ra1 Rd8 29.Ra6?? Nf3?? 30.Ke3?? Nh4?? 31.Rb6+– Qh3 32.Kd2 Nf3 33.Kc1 Qf1 34.Nd1 Qe1 35.Rc6 Qd2 36.Kb1 Qd1 37.Nc1 Nd2 38.Ka2 Ra8 39.Ra6 Ra6 40.ba6 g6 41.a7 (41.a7 e5 42.Qe5 f6 43.Qe7 Qc2 44.Bc2 Ne4 45.a8Q#) 1–0. olawoj – albani2012, kurnik, 2012.

4.Nf3 e6 5.d3 f5 6.c4 Ne7 7.b5 Bb7 8.Nbd2 c5 9.e3 f4 10.ef4 Qc7 11.Be2 Qf4 12.0–0 g5 13.Bh8 g4 14.Be5 Qh6 15.Ne1 g3 16.fg3 Bg7 17.Bg7 Qg7 18.Nef3 d6 19.Ne4 Nd7 20.Nd6 Kf8 21.Nb7 Kf7 22.Ne5 Kg8 23.Nd7 Rd8 1–0. thecat74 – gruniu, kurnik, 2012.

3.a4 d5

4.b5 Bb7 5.e3 c6 6.Nf3 c5 7.c4 Nd7 8.cd5 Bd5 9.Be2 Qc7 (9...e5 10.d3+=) 10.Nc3 Bb7 11.0–0 Ngf6 12.a5 a6 (12...ba5!? 13.Qa4 e5+=) 13.ab6 Nb6 (better 13...Qb6!? 14.ba6 Bf3 15.Bf3 Ra6+–) 14.ba6+– Bc6 15.Qb3 Nfd5 (15...Ng4 16.e4+–) 16.Nb5 Qa7?? (16...Qc8+–) 17.Na7 Ra7 18.Ne5 Ba8 19.Bb5 (19.Bb5 Rd7 20.a7+–) 1–0. GuestGKNZ – toniovan, freechess.org, 2020.

4.b5 Bb7 5.e3 Qd6 (5...a6 6.Nf3+=) 6.f4 (6.Nf3 a6+=) 6...f6 (6...Nd7 7.Nf3+=) 7.Nf3 (7.Bd3 a6+=) 7...Nd7 (7...a6 8.Nc3+=) 8.Ba3 c5 9.bc6 Qc6 (9...Bc6 10.Bd6; 9...Qc6 10.Nd4) 10.Nd4 Qc8 11.Ne6 (11.f5 g6+=) 11...g6 (11...Nh6 12.Nc3 Kf7 13.Nf8 Kf8 14.Qh5+=) 12.Nc3+/– Nc5 (12...Nh6 13.Nb5 Kf7 14.Nbc7+=) 13.Bb5 Kf7 14.Nf8 Kf8 15.0–0 Nh6 16.Ne2 a6+= 17.Bd3 Nd3 18.cd3 Qd7 19.Nd4 Kf7 20.f5 g5?? 21.Qh5+– Kf8 22.Qh6 Ke8 23.Ne6 Rg8 (24.Qh5 Rg6 25.Qh7 Qe6 26.fe6 Kd8 27.Qe7 Kc8 28.Qf8 Kc7 29.Bd6 Kc6 30.Rac1). cucumber (2380) – dennism (2065), net–chess.com, 2001.

4.Nf3 Nf6 5.b5 Bb7 6.e3 Nbd7 7.Be2 e5 8.Ne5 Ne5 9.Be5 Qe7 10.Bd4 0–0–0 11.0–0 c5 12.Bf6 Qf6 13.Nc3 d4 14.Na2 de3 15.fe3 Qg6 16.Bg4 Kb8 17.Nc3 Bd6 18.Bf3 Qh6 19.h3 Qh4 20.Bb7 Qg3 21.Bf3 h5 22.Ne4 Qh2 23.Kf2 f5 24.Nd6 Rd6 25.a5 h4 26.ab6 Qg3 27.Ke2 ab6 28.Ra8 Kc7 29.Rh8 f4 30.Qa1 Kd7 31.Qa7 Ke6 32.Re8 Kf6 33.ef4 Re6 34.Re6 Ke6 35.Qb6 Kf7 36.Qc7 1–0. riditko – patata, kurnik, 2012.

3.a4 e6

4.b5 Bb7 5.e3 c6 6.c4 cb5 7.cb5 Qe7 8.Nf3 Qb4 9.Ba3 Qg4 10.Bf8 Kf8 11.Ne5 Qe4 12.d4 Nf6 13.Nc3 Qf5 14.Bd3 Qh5 15.0–0 Qd1 16.Rfd1 d6 17.Nf3 Bf3 18.gf3 Kg8 19.Ne4 Nbd7 20.Nd6 Rb8 21.Rdc1 g6 22.Nc4 Kg7 23.h3 Nd5 24.Nd6 Nb4? 25.Be2 f5? 26.Rc7 Kh6 27.Rd7 Nc2 28.Rc1 Na3 29.Nf7 Kg7 30.Nh8 Kh8 31.Rcc7 a6 32.Rh7 Kg8 33.Rcg7 (33.Rcg7 Kf8 34.ba6+–) 1–0. cogit – jpedrolex, kurnik, 2012.

4.b5 Bb7 5.Nf3 Nf6 6.d3 Bb4 7.c3 Bd6 8.e4 Be7 9.Be2 0–0 10.0–0 d5 11.e5 Nfd7 12.d4 c5 13.bc6 Nc6 14.Nbd2 f6 15.ef6 Bf6 16.c4 dc4 (16...e5 17.de5 Nce5 18.Ne5 Ne5 19.a5+=) 17.Nc4 (17.Bc4 Re8+=) 17...Ba6 (17...Ne7 18.Nfe5=) 18.Nce5 (18.Ba3 Re8+=) 18...Nce5 (18...Nde5 19.de5 Qd1 20.Bd1 (20.Rad1? Be2 21.ef6 Bd1 22.Rd1 gf6–+) 20...Bf1 21.ef6=) 19.de5 (worse is 19.Ba6 Nf3 20.gf3 Bh4–/+) 19...Be7?? (better is 19...Be2 20.Qe2 Be7+=) 20.Ba6+– Qc7 21.Rc1 Bc5 22.Bd4 Rad8 23.Bc5 Nc5 24.Qe2 h6 25.Bc4 Qf7 26.Rfd1 Rde8 27.Rd6 Na4 28.Qa2 Nc5 29.Bb5 Re7 30.Be2 Qg6 31.Kf1 Kh8 32.Qc2 Rfe8 33.Qg6 (33.Qg6 Kg8 34.Nd4+–) 1–0. bratek55 (1725) – kamciusek, kurnik, 2011.

3.a4 Nf6

4.b5 Bb7 5.c4 e5 6.e3 g6 7.d4 Ne4 8.Bd3 f6 9.Be4 Be4 10.f3 Bb7 11.Ne2 1–0. yannigator (1920) – dcroll, net–chess.com, 2010.

4.b5 Bb7 5.e3 e6 6.Nf3 Be7 7.Be2 d6 8.0–0 Nbd7 9.d4 0–0 10.c4 a6 11.Nbd2 ab5 12.ab5 Ra1 13.Qa1 d5 14.Rc1 Ne4 (14...dc4 15.Ba3+=) 15.c5 Nd2 16.Nd2 bc5 17.dc5 Nc5 (better is 17...Nf6!?+/–) 18.Bg7+– Ne4 (18...Re8 19.Bh6 f6 20.Bh5+–) 19.Ne4 de4 20.Bh6 (20.Bf8 Bf8 21.Rd1 Bd6+–) 20...Bf6 21.Qa5 Bg7 22.Bg7 (22.Qc7 Bh6 23.Qb7 Qd2–/+) 22...Kg7 23.Rc7 Bd5 24.b6 Qa8 (24...Qd6 25.Qc5 Qc5 26.Rc5+–) 25.Qc3 (25.Ba6 Rb8+–) 25...Kg8 26.Qf6 Qa2 27.Qg5 (27.Bf1 Qa8+–) 27...Kh8 28.Bf1 Rg8 (28...Qa8+–) 29.Qf6 Rg7 30.Rc8 1–0. GuestSBKR – danironmh, freechess.org, 2018.

3.Nf3 Nc6

4.a3 d5 5.d3+=.

4.a3 f6 5.Nc3 e6? (better is 5...Bb7+/–) 6.b5+– Bb5 7.Nb5 Na5 8.d3 c6 9.Nc3 d5 10.g3 c5 11.Bg2 d4 12.Ne4 Qd5 (12...Nc6 13.c3+–) 13.Nfd2 c4 (13...Qd8 14.c3+–) 14.0–0 (14.Nf6 Nf6 15.Bd5 ed5 16.dc4 dc4 17.Bd4 Be7+–) 14...Rb8 (14...Qd7 15.c3 Rc8 16.cd4 f5+–) 15.Nf6! gf6 16.Bd5 ed5 17.Nf3 c3 18.Bc1 b5 19.e3 Bc5 20.ed4 Bd6 21.Qe2 Ne7 22.Re1 Nac6 Black plans b4 23.Nh4 b4 24.ab4 Bb4 25.Nf5 Rb7 26.Nd6! Kd7 27.Nb7 Nd4 28.Qe6! Ne6 29.Re6 Ke6 30.Ra7 Nc6 31.Ra6 Kd7 32.Be3 d4 33.Bf4 Rc8 34.Kg2 h5 35.h4 Nb8?? 36.Rf6+– Nc6 37.Rf7 Ne7 38.Rh7 Rb8 39.Bb8 Kc8 40.Ba7 Kb7 41.Bd4 Kc6 42.Rh5 Nd5 43.Rf5 Kd6 44.h5 Ke6 45.Rf3 Ne7 46.g4 Ng8 47.Kg3 Nh6 48.Rf6 Kd5 49.Rh6 Kd4 50.Rb6 Ba3 51.Rb3 Bd6 52.Kh4 1–0. linakip – winettu, kurnik, 2012.

4.a3 g6?? 5.g3 (5.Bh8 Nh6 6.Nc3 f6+–) 5...Bh6?? (better is 5...Nf6+=) 6.Bh8+– e5 7.Bg2 Qe7 8.0–0 f5 9.d3 Qf8 10.Ne5 Nf6 11.Nc6 dc6 12.Bc6 Ke7 13.Bf6 Kf6 14.Ba8 Qa8 15.Nc3 Qh1 16.Kh1 Bb7 17.f3 Bg7 18.Rb1 Bh6 19.e4 fe4 20.fe4 (20.fe4 Ke7 21.Qf3 Bc6 22.b5 Be8 23.Qf6 Kd7 24.Nd5 Kc8 25.Qe5 Bf4 26.Rf4 Kb7 27.Qc7 Ka8 28.Qc8#) 1–0. linakip – black8715, kurnik, 2011.

4.c3 d6 5.a4 Bb7 6.b5 Na5 7.e3 h5 8.Be2 Qd7 9.0–0 Rh6 10.d4 Bf3 11.Bf3 (11.gf3?! Nf6 12.Bd3 d5=) 11...0–0–0 12.Nd2 Nf6 13.Rc1 (13.c4 g5+/–) 13...g5 14.c4 White intends d5 14...g4 15.Be2 h4 16.d5 g3 17.h3 gf2 18.Rf2 Rg6? (18...Bg7 19.Bf6 Rf6 20.Bg4+/–) 19.Kh2?? (better is 19.Bf6 ef6 20.Bg4 Rg4 21.Qg4 (21.hg4?! Bh6 22.Qf3 Re8+–) 21...Qg4 22.hg4+–) 19...e6?? (better is 19...Bg7 20.Bd3 Rg3+/–) 20.Bf6+– Re8 21.Bh4 ed5 22.cd5 Kb8 23.e4 Be7 24.Be7 Qe7 25.Qc2 Qe5 26.Kh1 Reg8 27.Qc7 Ka8 28.Bf3 Nb7 29.Qf7 Qd4 (29...Qd4 30.Qg6! Rb8+– (30...Rg6?? 31.Rc8#)). lican – mariopilch, kurnik, 2012.

3.Nf3 d6

4.a4 b5 5.ab5 Bb5 6.Nc3 Bc6 7.e3 Nf6 8.Bd3 e5 9.b5 Bb7 10.h3 Be7 11.0–0 0–0 12.e4 c5 13.bc6 Nc6 14.Ne2 Nb4 15.Bc3 Nd3 16.cd3 Qd7 17.Ng3 Qb5 18.Nf5 Rfe8 19.Ne7 Re7 20.Qc2 a6 21.Rab1 Qd7 22.Nh4 d5 23.Qb3 de4 24.de4 Ne4 25.f3 Nc3 26.dc3 Bd5 27.Qb6 Qa7 28.Nf5 Qb6 29.Rb6 Re6 30.Re6 fe6 31.Ne3 Bc6 32.c4 a5 33.Ra1 a4 34.Nc2 1–0. riditko – fridolek, kurnik, 2012.

4.d3 c6 5.e3 Nd7 6.Be2 e5 7.0–0 Ngf6 8.a3 Be7 9.c4 d5? (better is 9...0–0!?=) 10.cd5 Nd5 11.Ne5 Ne5 12.Be5 f6 (12...Bf6 13.Bf6 Qf6 14.d4 Be2 15.Qe2+/–) 13.Bb2 Bd6 14.Bh5 Kd7 15.Bg4 Kc7 16.Nc3 h5? 17.Bf3 Nc3+/– 18.Bc3 g5? 19.Qc2 Kb7?? 20.Bb2 Qc7 21.Bf6 Bh2 22.Kh1 g4 23.Be4 Rhf8 24.Bh4 Rac8? 25.Rac1 Bb5?? 26.a4 Bd3 27.Bd3 Qe5 28.Qc3 g3 29.Qe5 gf2 30.Qh2 1–0. erisonpassos – luisruizgr, kurnik, 2011.

2.Bb2 Bb7

3.a3 f5 4.e3 Nf6 5.h4 (5.Nf3 e6=) 5...d6 (5...a5 6.ba5 Ra5 7.Nf3=+) 6.h5 (6.Bf6 ef6 7.Nf3 a6=) 6...e5 7.Nf3 Nbd7 8.d4 e4 (8...Qe7 9.Nc3=) 9.Nfd2 (9.Nh4 g6=) 9...Qe7 (9...a5 10.b5=) 10.h6 (10.c4 a5=) 10...gh6 11.c4 Bg7 (11...Rg8 12.Nc3=) 12.Nc3 a6 (12...c6 13.b5=) 13.Qb3 (13.Ne2 Qf7=) 13...Nf8 (13...Rg8 14.Ne2=) 14.Ne2 (14.c5 N8d7=) 14...Ng6 (14...Qd7 15.d5=) 15.Ng3 (15.Qa4 c6=) 15...Bc8 (better 15...Qd7=) 16.0–0–0?? (16.Rd1 Bd7=) 16...Bd7 (16...Ng4 17.f3 Nf2 18.Be2–/+) 17.Kb1 (17.Be2 a5 18.b5 0–0–0=) 17...0–0 (better 17...Ng4 18.Re1 Nf2–/+) 18.Be2 (18.f3 ef3 19.gf3 f4 20.ef4 Nf4=) 18...Kh8 (18...f4 19.Nh5=) 19.d5 (19.Nh5 Nh5 20.Rh5 c5=) 19...Ne5 (19...Rac8=) 20.Rh4 (20.Bd4 Rac8=) 20...a5 (20...Nfg4 21.Rh5 Nf2 22.Rf1=+) 21.Rdh1 (21.Be5 de5 22.Rdh1 b5 23.cb5 ab4–/+) 21...ab4 22.ab4 (22.Qb4 Nfg4 23.Bg4 Ng4=+) 22...Nfg4 (22...Ng6 23.R4h2 Ba4 24.Qc3=+) 23.Bg4=+ fg4 (23...Ng4!? 24.f3 Nf2–/+) 24.Nde4= Ba4 (24...c6 25.dc6 Bc6 26.b5 Be4 27.Ne4=+) 25.Qc3 b5 (25...Qf7=) 26.Rh6?? (better 26.Nh5 bc4 27.Rg4 Ng4 28.Qg7 Qg7 29.Bg7 Kg8 30.Bf8 Rf8 31.Nf4+–) 26...Bh6=+ 27.Rh6 bc4? (27...Rae8 28.c5 Qg7+–) 28.Qc4?? (better 28.Re6 Qe6 29.de6+–) 28...Qg7=+ 29.Be5 Qe5 30.Qc3?? (better 30.Rh5 Bb5 31.Re5 Bc4 32.Rg5–/+) 30...Qc3–+ 31.Nc3 Rf2 32.Nce4 (32.Rh2–+) 32…Bc2 (32...Bc2 33.Kb2 Be4 34.Kc3 Ra3 35.Kd4 Bg2–+) 0–1. FeegLood (2865) – hiimgosu (2850), lichess.org, 2015.

3.a3 g6?? 4.f3 (better is 4.Bh8 a5 5.Nc3+–) 4...Nf6= 5.e4 Bg7 6.d4 Nc6 (6...0–0 7.Bd3=) 7.c3 (7.e5 Nd5=) 7...a5 8.b5 Nb8 9.Bd3 0–0 10.Ne2 d5 11.e5 Nfd7 12.0–0 c6 13.bc6 Nc6 14.Nd2 f6 15.ef6 Nf6= 16.Ng3 e5+= 17.de5 Ne5 18.Qe2? Nd3–+ 19.Qd3 Ba6 20.Qe3 Bf1 21.Rf1 Re8 22.Qd3 Nd7 23.Nb3? Nc5 24.Qd2?? Nb3 25.Qc2 Nc5 26.Ne2 Qe7 27.Nd4 Qe3 28.Kh1 Bd4 29.cd4 Nd3 30.Bc3 0–1. Fournier,Frederic (2000) – Chantapufete (1905), Active, 2005.

3.a3 Nh6 4.e3 e6 5.Nf3 Nc6 6.c4 Ne7 7.d4 Nhf5 8.Bd3 Nh6 9.0–0 d5 10.cd5 Bd5 11.Nc3 Bb7 12.Ne5 Bd5? (better is 12...f6!? 13.Nc4 a6+/–) 13.Nd5 Qd5 14.Qc2 c6 15.Be4 Qd6 16.Rac1 (16.Bh7 g6 17.Bg6 A) < 17...Ng6 18.Ng6 fg6 19.d5+/– (19.Qg6?! Nf7 20.f4 Rh6=); B) 17...fg6=+) 16...Rc8 17.Rfd1 f5 18.Bf3 Ng6 (better is 18...b5+–) 19.Bc6 Rc6 (19...Ke7+–) 20.Qc6 Qc6 21.Rc6 Ne5 22.de5 (< 22.Re6 Kd7 23.Re5 Bd6+–) 22...Be7 (22...Kf7 23.Rd7 Be7 24.Ra7 Rd8+–) 23.Rc8 (23…Kf7 24.Rh8+–) 1–0. Wall,Bill – VonPawn, internet, 2002.

3.a4 a5 4.b5 (--> 1.b4 a5 2.b5 b6 3.a4 Bb7 4.Bb2).

3.a4 Bg2?? 4.Bg2+– Nc6 (4...c6+–) 5.b5 Nf6 (5...Na5 6.Ba8 Qa8 7.Nf3+–) 6.bc6 d6 7.Bf6 gf6 8.Nf3 Bg7 9.c3 e5 (9...e6 10.a5+–) 10.d4 (10.Rg1 Qc8+–) 10...h5 (10...f5 11.d5+–) 11.e3 (11.Bh3 Qe7+–) 11...Bh6 (11...f5 12.Rg1 e4 13.Bh3+–) 12.Nbd2 (12.Bh3 Qe7+–) 12...Rg8 (12...d5 13.c4+–) 13.Bh3 h4 (13...Bg5 14.Ne4+–) 14.Nh4 Bg5 15.Bd7 Kf8 16.Nf5 Rh8 17.h4 Bh6 18.Qg4 Rg8 19.Qh5 Bg7 20.Qh7 a6 21.Rg1 Qd7 22.cd7 Rd8 23.Rg7 Rd7 (23...Rg7 24.Qg7) 24.Qg8 (24.Rg8?!=) 1–0. RichardSommer (1970) – alijj (1850), lichess.org, 2020.

3.b5 a5 4.a4 (--> 1.b4 a5 2.b5 b6 3.a4 Bb7 4.Bb2).

3.b5 f5 4.a4 (4.e3 a6=) 4...a6 5.e3 ab5 (5...e6 6.Nf3=) 6.ab5 Ra1 7.Ba1 e6 8.Nf3 Nf6 9.c4 (9.Be2 Bb4=) 9...g6 (9...Bd6!?=) 10.Be2+= Bg7 11.0–0 0–0 12.d4 d6 13.Nc3 Nbd7 14.Bb2 Qe7 15.Qb3 e5?? (better 15...Ra8+=) 16.c5+– Kh8 17.c6 ed4 18.Nd4?? (better 18.ed4 Ba8 19.cd7 Qd7 20.Ng5+–) 18...Nc5+– 19.Qc4 Bc8 20.Ra1 f4 (20...Ng4 21.Nd5 Qh4 22.Bg4 fg4 23.Qc2+–) 21.Nd1 (21.ef4!? Ne6 22.Ne6 Be6 23.Qb4+–) 21...fe3+= 22.Ne3 Nfe4 23.Nd5 Qf7 Now all is on f2 (23...Qh4 A) 24.Nc7? Qf2 (24...Rf2 25.Nf3 Rg2 26.Kg2 Qg4 27.Kf1 Bb2 28.Qf7 Qh3 29.Ke1 Bc3 30.Kd1+–) 25.Kh1 Bg4–+; B) 24.g3 Qh3 25.Nf4+= (25.Nc7 Rf2 26.Qg8 Kg8 27.Bc4 Kh8 28.Ra8 Qh2)) 24.Bf3 (24.f3 Nd2 25.Qc2 Qd5 26.Qd2 Re8+=) 24...Nd2 25.Qc3?? (25.Qe2 Nf3 26.Qf3 Qg8=) 25...Nf3?? (better 25...Nce4 26.Qc2 Qd5–+ (26...Nf3?! 27.gf3 Ng5 28.Qb3–/+)) 26.Qf3= Qf3 (better 26...Qg8!? 27.Ne7 Rf3 28.Ng8 Rd3=) 27.gf3+– Ne6 (27...Nb3!? 28.Nb3 Bb2+–) 28.Ne6+– Bb2 (better 28...Be6 29.Nc7 Bc4+–) 29.Nf8 Ba1 30.Nc7 (better 30.Nd7 Kg8 31.Ne7 Kf7 32.Nc8 Ke8+–) 30...Kg7? (30...Kg8 31.Nd7 Bd7 32.cd7 Bf6+–) 31.Nd7 Kf7 (31...Bd4 32.Nd5 Kf7 33.Kg2+–) 32.Nb6 Bf5 33.Nbd5 Bd4 34.b6 Bc8 (34...Bb6 35.Nb6 Kf6 36.Ncd5 Ke5 37.c7+–) 35.b7 Bb7 36.cb7 Ba7 37.Na6 (37.Nb5 Bb8 38.Nd4 h5+–) 37...Ke6 (37...Ke8+–) 38.Ndc7 (better 38.Nb6! Bb6 39.b8Q+–) 38...Kd7 39.Nb5 Kc6 40.Na7 Kb7 41.Nb5 Ka6 42.Nd6 Kb6 43.Ne4 Kc6 44.Kg2 Kd5 (44...h6 45.Ng5+–) 45.Kg3 (45.Nf6 Ke5 46.Nh7 Ke6+–) 45...Ke5 46.Kg4 h5 (46...h6 47.f4 Ke6 48.Ng3+–) 47.Kg5 (47.Kg5 h4 48.Nc5+–) 1–0. BeepBeepImAJeep (2765) – OneToOne (2515), lichess.org, 2019.

3.b5 h6 4.a4 a5 5.c4 d6 6.e3 Nf6 7.Nf3 Nbd7 8.Be2 Nc5 (8...e6 9.0–0+=) 9.0–0 e6 10.d4 Ncd7 11.Nc3 Be7 12.Nd2 0–0 13.Bf3 Bf3 (13...Qc8 14.Rb1+=) 14.Qf3 (14.gf3?! e5=) 14...e5 15.Rfd1 e4 (better 15...Rc8!?+–) 16.Nce4 Ne4 17.Ne4 Nf6 (17...Re8 18.Ng3+–) 18.Ng3 d5 (18...Re8 19.e4+–) 19.Rac1 (19.Nf5 dc4 20.Ne7 Qe7+–) 19...dc4 20.Rc4 (20.Nf5 c3 21.Rc3 Bd6+–) 20...Bb4 (20...Ne8 21.Rc6+–) 21.d5 Bd6 (21...Ne8+–) 22.Nf5 Qe8 (22...Re8 23.Ng7! Re5+–) 23.Nh6! gh6 (23...Kh7 24.Bf6 Be5 25.Qf5 Kh8 26.Qh5 Bh2 27.Kh1 Qe5 28.Nf5 Kg8 29.Rh4 Qf6 30.Qh7) 24.Qf6 (24.Rg4 Ng4 25.Qg4 Kh7 26.Qg7) 24...Be5 (24...Bh2 25.Kh2 Qe5 26.Be5 Rfe8 27.Qg7) 25.Be5 (25.Rg4 Kh7 26.Rg7 Kh8 27.Qh6) 25...Qe5 26.Qe5 (26.Rg4 Qg5 27.Rg5 hg5 28.Qg5 Kh7 29.Rd4 Rad8 30.Rh4) 26...Rae8 (26...Rfd8 27.Rg4 Kf8 28.Rc1 Re8 29.Qg7 Ke7 30.Re4 Kd8 31.Qf6 Kc8 32.Re8 Kb7 33.Qc6 Ka7 34.Ra8) 27.Rg4 (27.Rg4 Kh7 28.Qg7) 1–0. BeepBeepImAJeep (2555) – yak777, lichess.org, 2017.

3.c3 a5 4.Nf3 Nf6 5.ba5 (5.b5!?=) 5...Ra5=+ 6.Na3 d5 7.c4 g6 (7...e6 8.Qc1–/+) 8.e3 Bg7 9.Nb5 0–0 10.Bc3 Ra8 11.a4 c6 12.Nbd4 c5 (12...Ne4 13.a5–/+) 13.Nb5–/+ dc4 (better 13...Nc6!?–/+) 14.Bc4= Bd5 15.Bd5 Nd5 (15...Qd5? 16.Nc7 Qc6 17.Na8 Qa8 18.Qb3+–) 16.Bg7 Kg7 17.0–0 Nc6 18.Qb1 (18.d4 cd4 19.Rc1 Qd7 20.Nbd4 Nd4 21.Qd4 Nf6 22.Qb6 Qa4=) 18...Ndb4 (18...e5 19.d4 ed4 20.ed4 cd4 21.Rd1=+) 19.Qb2 Kg8 20.h4 (20.d4 e6=) 20...Nd3=+ 21.Qc3 e5 22.e4 (22.Ra3 e4 23.Ng5 Nce5=) 22...Re8 23.Ra3 Nf4 24.Re1 Nb4 (24...Qe7 25.g3 Nh5 26.Qc4=+) 25.g3= (25.Ne5? Re5! (25...Qh4?! 26.g3 Qg5 27.d4=) 26.Qe5 Nfd3 27.Rd3 Nd3–+) 25...Nfd3 (better 25...Nh5!?=) 26.Re3+– h6 27.Rd3 Nd3 28.Qd3 Qd3 29.Rd3 Ra4 30.Nd6 Re6 31.Rb3?? (better 31.Rd5 f6 32.Kg2+=) 31...Rd6–+ 32.Ne5 Rd2 33.Rb6 Raa2 (33...Re4 34.Nf3 Ra2 35.Rc6–+) 34.Rb8?? (34.Rf6 Ra7 35.Rc6–+) 34...Kg7 35.Rb7 (35.Rc8 Rf2 36.Rc5 Rfe2–+) 35…Rf2 0–1. beatmeeasy (1860) – Nandeko (1860), lichess.org, 2020.

3.Nc3 a5 4.b5 a4 5.Nb1 e6 6.a3 Nf6 7.c4 Ne4 8.f3?? (better 8.d3 Nc5 9.Nf3=) 8...Qh4–+ 9.g3 Ng3! 10.hg3 (10.hg3 Qg3 Mate attack) 10...Qh1 (10...Qg3) 11.Kf2 (11.Bd4 Bc5 12.Bc5 bc5–+) 11...Qh2 12.Bg2 Bd6 13.Bg7 (13.Nc3–+) 13...Qg3 14.Ke3 Qg2 (14...Qg7 15.Nc3 Qg2 16.d4–+) 15.Nc3?? (15.Bh8 f6! 16.Bf6–+) 15...Rg8 16.Bf6 Qg1! 17.Qg1 Bc5 18.d4 Rg1 19.Rg1 Be7 (19...Bf8 20.Kd3–+) 20.Be5?? (better 20.Rg8 Bf8 21.Bg7+=) 20...d6–+ (20...Ba3?! 21.Rg8 Ke7 22.Bc7–+) 21.Rg8 Kd7 22.Bh2 c6 (22...d5!? 23.Rg7 h6 24.cd5 Bd5 25.Rf7–+) 23.Rg7 cb5 24.cb5 Ke8 (24...h6 25.Rf7 Ke8 26.Rg7–+) 25.Rh7? (25.Rg8 Bf8 26.Bd6–+) 25...Nd7 26.f4 (26.Kd3 d5 27.Rh8 Nf8–+) 26...f5 (26...d5 27.Rh8 Nf8 28.f5–+) 27.Bg3 (27.Rh6 d5 28.Re6 Kf7 29.Re7 Ke7–+) 27...Nf6 (better 27...d5–+) 28.Rh6 (28.Rh8 Bf8–+) 28...Kd7 (better 28...Ng4 29.Kd3 Nh6–+) 29.Kd2 d5 (better 29...Ne4!? 30.Ne4 Be4 31.Bh4–+) 30.Bh4 Ne4 31.Ne4 de4?? (better 31...Bh4 32.Ng5 Bg5 33.fg5 Rg8 34.Rh7 Kc8–+) 32.Rh7?? (better 32.Be7 Ra5 33.Rh7 Rb5 34.Bf6 Kc6 35.Be5 e3 36.Ke3 Rb3 37.Kd2=+) 32...Re8–+ 33.e3 Kd8 34.Be7 Re7 35.Rh8 Kd7 36.Rb8 Kc7 37.Rh8 Rg7 38.Rh4 (38.Rh2 Kd6–+) 38...Rg2 39.Kc3 (39.Kc1 Ra2 40.Rh7 Kb8–+) 39...Ra2 (39...Bd5!? 40.Rh1 Re2 41.Rc1–+) 40.Kb4 (40.Rh7 Kb8 41.Rh8 Ka7–+) 40...Bd5 41.Ka4 Rc2 42.Rh3 (42.Kb4 Rc4 43.Kb3 Rd4 44.Kc2 Rd3–+) 42...Rc3 (42...Ba2 43.Rh7 Kd6 44.Rc7 Rc7 45.d5 Rc4) 43.Kb4–+ Rb3 44.Ka4 Rc3 (44...Kd6!? 45.Rh8 Rc3 46.Rh2–+) 45.Kb4 Rd3 46.a4 (46.Ka4 Kd6 47.Rg3–+) 46…Rb3 0–1. alessandrocarvalhaes (1850) – hosseyn911 (1820), lichess.org, 2020.

3.Nc3 e5 4.e4 (4.a3 d5=) 4...Bb4=+ 5.Bc4 (5.Nd5 Bd5 6.ed5 f6=+) 5...Bc3 (5...Nf6 6.Nd5 Nd5 7.Bd5 Bd5 8.ed5–/+) 6.Bc3=+ Be4 7.Nf3 (7.Qg4 Bg6 (7...Bc2?? 8.Qg7 Qf6 9.Be5 Qg7 10.Bg7+–) 8.Bf7 Kf7 (< 8...Bf7 9.Qg7 d6 10.Qh8+/–) 9.Qf3 Nf6 10.Qa8 Be4 11.Qa7 Bg2–+) 7...d6 8.d3 (8.Qe2!? Nf6 9.Bf7 Kf7 10.Ng5 Kg6 11.Ne4=+) 8...Bg6 9.0–0 Nf6 10.Bb2 0–0 11.Bb3 (11.Qe2 c6–+) 11...Nbd7 12.Re1 Nc5 13.d4 ed4 14.Bd4 Nfe4 15.Bc5 (15.Bd5 Rb8–+) 15...Nc5–+ 16.Bd5 Rc8 17.Bc6 f6 (17...Qf6 18.Qd2–+) 18.Re3 Be8 19.Qd5 Kh8 20.Rae1 Bc6 21.Qc6 Qd7 22.Qd7 Nd7 23.Re7 Ne5 24.Ne5 fe5 25.Re3 Kg8 26.Rg3 Rf7 27.Re6 Kf8 28.Kf1 Re8 29.Re8 Ke8 30.Ke2 Kd7 31.Ke3 Ke6 (32.Rh3 h6–+) 0–1. alaamattar (2105) – kiloracer (2100), net–chess.com, 2005.

3.d3 a6 4.Nd2 d6 5.e4 e5 6.g3 Ne7 7.Bg2 Ng6 8.Qg4 Bc8 9.Qe2 Be7 10.c3 0–0 11.d4 f5?? (11...ed4 12.cd4 d5 13.a3=+) 12.d5 (better 12.ef5 Nf4 13.gf4+–) 12...fe4 13.Be4 Qe8 14.Ngf3 (14.h4 Nd7=) 14...Bg4 15.Qe3 h6 16.h3 Bf3 (16...Bf5 17.Bf5 Rf5 18.c4=) 17.Nf3+= (17.Bf3?! Bg5 18.Qe2 Bd2 19.Kd2 Nd7=) 17...Nd7 18.h4 Bf6 (18...Nh8 19.c4=) 19.h5 (19.Qd3!? Nh8 20.g4+–) 19...Nh8 20.g4 Nf7 21.Bg6 Qe7 22.c4 (22.Bf5 b5=) 22...Ng5 23.Nh4 (better 23.Ng5 Bg5 24.Qe2=) 23...Nf3?? (better 23...e4 24.Nf5 Qd8–/+) 24.Nf3+– (24.Qf3?! Bh4 25.Bf5 Bg5=) 24...Bg5 (24...a5 25.g5! Bg5 26.Ng5 Qg5 27.Qg5 hg5+–) 25.Ng5 Qg5 26.Qg5 hg5 27.Rh2 (27.Bf5 Rf5 28.gf5 Rf8+–) 27...Nf6 (27...Rf4 28.Bd3 Rg4 29.Bf5 Rg1 30.Ke2 Ra1 31.Ba1+– (31.Bd7? Ra2 32.Be6 Kf8–+)) 28.f3 b5 29.cb5 ab5 30.a3 Nd5 31.Rh3 (better 31.Be4 c6 32.Rd2+–) 31...Nf4 32.Rg3 Nd3?? (better 32...Ng6 33.hg6 Rf6+–) 33.Kd2 (better 33.Bd3 c6 34.Bf5+–) 33...Nb2–/+ 34.Be4 Nc4 35.Kc3 (35.Ke2 Ra3 36.Ra3 Na3–/+) 35...Ra3 36.Kc2?? (better 36.Ra3 Na3 37.Kb3–/+) 36...Ra1–+ 37.Bd5 Kh7 38.Be6 (38.Bc6 Rf1 39.Kd3 Rd1 40.Kc2 Ne3 41.Kc3 Rc1 42.Kd3 Rc6 43.Ke3 Rc3 44.Ke2 e4–+) 38...Ra3 39.Bf5 Kh6 40.Rh3 (40.Be4 Rf4 41.Rg1 Ra2 42.Kb1 Rd2–+) 40...Ne3 (40...Ra2 41.Kc1 Rfa8 42.f4 Rb2 43.fg5 Kg5 44.Rg3 Ra1 45.Bb1 Rab1) 41.Kb2 Nf5 (better 41...Rfa8 42.Bb1–+) 42.Ka3 Nd4 43.Kb2 Rf3 44.Rh1 Rb3 45.Ka2 (45.Kc1 Rb4 46.Rf1 Nb3 47.Kc2 Rf4–+) 45...Rb4 46.Rc1 Rc4 47.Rb1 (47.Rf1 Rc2 48.Kb1 Rg2–+) 47...Nc6 48.Rb5 Ra4 49.Kb3 Rb4! 50.Rb4 Nb4 51.Kb4 g6 52.hg6 Kg6 53.Kc4 Kf6 54.Kd5 Ke7 55.Ke4 Ke6 56.Ke3 c6 57.Ke4 d5 58.Ke3 c5 Black intends d4 59.Kd3 e4 60.Ke3 Ke5 61.Ke2 d4 62.Kd2 Kf4 63.Ke2 Kg4 64.Kd2 If White now would get c4 in, he might survive 64...Kf4 65.Ke2 c4 Black prepares the advance d3 66.Kd2 (66.Kd1 e3 67.Kc2 e2 68.Kb1 e1Q 69.Kb2 Qb4 70.Kc2 d3 71.Kd1 Qb2 72.Ke1 Qe2) 66...Kf3 (66...e3 67.Ke2 d3 68.Kd1 c3 69.Kc1 e2 70.Kb1 e1Q 71.Ka2 d2 72.Kb3 d1Q 73.Kc4 Qa4 74.Kc5 Qe3 75.Kd5 Qe5) 67.Ke1 (67.Kc2 e3 68.Kb2 e2 69.Kc2 e1Q 70.Kb2 Qc3 71.Ka2 d3 72.Kb1 d2 73.Ka2 Qb3 74.Ka1 d1Q) 67...g4 (67...e3 68.Kd1 Kf2 69.Kc1 e2 70.Kb1 e1Q 71.Kb2 Qb4 72.Kc2 d3 73.Kc1 c3 74.Kd1 Qb1) 68.Kf1 (68.Kd2 e3 69.Kc2 e2 70.Kb1 e1Q 71.Kb2 Qc3 72.Ka2 g3 73.Kb1 g2 74.Ka2 Qb3 75.Ka1 g1Q) 68...c3 69.Ke1 d3 70.Kd1 e3 71.Ke1 (71.Kc1 e2 72.Kb1 e1Q 73.Ka2 d2 74.Kb3 d1Q 75.Kb4 Qd4 76.Kb3 Qed1 77.Ka3 Q1a4) 71...g3 (71...c2 72.Kf1 c1Q) 72.Kd1 (72.Kf1 e2 73.Ke1 d2) 72...Kg2 (72...e2 73.Ke1 d2) 73.Ke1 (73.Kc1 e2 74.Kb1 e1Q 75.Ka2 d2 76.Kb3 d1Q 77.Kb4 Qd4 78.Kb3 Qed1 79.Ka3 Q1a4) 73...Kg1 (73...Kh2 74.Kd1 g2 75.Ke1 g1Q) 74.Kd1 Kf1 (74...e2 75.Ke1 c2 76.Kd2 e1Q 77.Kd3 c1Q 78.Kd4 Qee3 79.Kd5 Qcc5) 75.Kc1 Ke1 Black plans d2 (75...e2 76.Kb1 e1Q 77.Ka2 d2 78.Kb3 d1Q 79.Kc4 Qa4 80.Kd5 Qee4 81.Kc5 Qab4) 76.Kb1 Kd1 Black prepares c2 77.Ka2 Kc1 (77...e2 78.Kb1 c2 79.Kb2 c1Q 80.Ka2 e1Q 81.Kb3 Qc2 82.Ka3 Qec3) 78.Kb3 c2 79.Kc3 d2 80.Kd3 (80.Kd4 d1Q 81.Kc3 e2 82.Kc4 e1Q 83.Kc5 Qa5 84.Kc4 Qdd5) 80...d1N (80...d1Q 81.Ke4 e2 82.Ke5 e1Q 83.Kf4 Qe6 84.Kg3 Qdg4 85.Kf2 Qee2) 81.Ke2 (81.Ke4 g2 82.Kd4 e2 83.Ke4 e1Q 84.Kd5 Nc3 85.Kc4 Qh4 86.Kc3 g1Q 87.Kd3 Qgd4 88.Ke2 Qhf2) 81...Kb2 (81...g2 82.Kf3 g1Q 83.Ke4 e2 84.Kd5 Qg2 85.Kd6 e1Q 86.Kc7 Qe7 87.Kb6 Qgb7 88.Ka5 Qeb4) 82.Kf3 c1N (82...g2 83.Ke4 e2 84.Ke5 e1Q 85.Kf6 c1Q 86.Kf5 g1Q 87.Kf6 Qf4) 83.Kg3 (83.Kg4 g2 84.Kg5 g1Q 85.Kf5 e2 86.Kf6 Qf2 87.Ke7 e1Q 88.Kd7 Qc5 89.Kd8 Qee7) 83...e2 84.Kf3 (84.Kh4 e1Q 85.Kg5 Qe7 86.Kf4 Nd3 87.Kg4 Qf6 88.Kh5 Qf5 89.Kh6 Ne5 90.Kg7 Qg6 91.Kf8 Qf7) 84...Kc2 (84...e1Q 85.Kf4 Nd3 86.Kg5 Qe5 87.Kg6 Qf4 88.Kg7 Ne5 89.Kh8 Qh6 90.Kg8 Qg6 91.Kf8 Qf7) 85.Kf4 Kd2 (85...Nd3 86.Ke4 e1Q 87.Kd5 Qe5 88.Kc6 Qe6 89.Kb7 Qd7 90.Kb6 Qd6 91.Kb7 Nc5 92.Kc8 Qc6 93.Kd8 Qd7) 86.Kf3 e1Q 87.Kf4 Qe3 88.Kf5 (88.Kg4 Qh6 89.Kf3 Qh5 90.Kg3 Ne2 91.Kg2 Ne3 92.Kf2 Qf7) 88...Nd3 (88...Qh6 89.Ke5 Nd3 90.Ke4 Ne3 91.Kd4 Qf4) 89.Kf6 Nc3 90.Kf5 Nd5 91.Kg4 (91.Kg6 Qf3 92.Kg5 Ne5 93.Kh6 Qf4 94.Kg7 Qf7 95.Kh6 Qg6) 91...Ne5 (91...Qh6 92.Kg3 Ne3 93.Kf3 Qf4) 92.Kf5 Kd3 93.Ke6 Kd4 (93...Ke4 94.Kd6 Qb6) 94.Kd6 (94.Kf5 Qf4 95.Ke6 Qf6) 94…Qe4 (94...Qe4 95.Ke6 Qg6; 94...Qh6) 0–1. alessandrocarvalhaes (1710) – YAH80 (1740), lichess.org, 2019.

3.d3 f5 4.Nd2 e6 5.e3 Bb4?? 6.Bg7+– Qg5 7.Bh8 Bg2 8.Bg2 Qg2 9.Qf3 Qf3 10.Ngf3 Nc6 11.Bb2 Nf6 (11...Bf8 12.c4+–) 12.h3 (12.Bf6 Kf7 13.Bb2 Rg8+–) 12...0–0–0 (12...Kf7 13.Rg1+–) 13.0–0–0 (better 13.Bf6 Rf8 14.Bb2 f4+–) 13...a5 (13...Nd5+–) 14.Bf6 (14.Bf6 Rf8 15.Bb2+–) 1–0. alessandrocarvalhaes (1895) – barnacle (1960), lichess.org, 2019.

3.d4 g6 4.e3= Bg7 (4...Nf6 5.Nf3=) 5.Nf3 e6 (5...Nf6 6.Bd3=) 6.c4 (6.Bd3 Nc6 7.a3 a6+=) 6...Nc6 (6...Nf6 7.Bd3+=) 7.a3 (7.b5 Nb4+=) 7...a5 (7...a6 8.Bd3+=) 8.b5 Na7 (8...Nce7 9.Bd3+=) 9.Bd3+/– d5 (9...Ne7 10.0–0+/–) 10.0–0 (10.cd5 ed5 11.0–0 c5 12.bc6 Nc6+/–) 10...dc4 11.Bc4 c6 12.bc6 (12.Nc3 Nf6+/–) 12...Bc6 (12...Nc6 13.Qa4+/–) 13.Nc3 (13.Nbd2 Nf6+/–) 13...Qd6 (13...Ne7 14.Ne5+=) 14.Rc1 0–0–0 (14...b5!? 15.Bd3 Rd8+/–) 15.Ne4 Qd7 (15...Be4 16.Bd5 Kd7 17.Be4 b5+–) 16.Qb3 b5? (16...Qc7+–) 17.Bb5 Nb5 (17...Qb7 18.d5! ed5 19.Bg7 Qb5 20.Qb5 Nb5 21.Bh8 de4 22.Ne5+–) 18.Qb5 Ne7 19.d5! ed5 (19...Qd5 20.Qa6) 20.Qa6 (< 20.Bg7 de4 21.Bh8 ef3+–) 20...Qb7 21.Qb7 (21.Bg7? Qa6 22.Nf6 Rhe8–+) 21...Kb7 22.Nc5 (22.Bg7?! de4 23.Ng5 Rhg8 24.Nf7 Rd3+/–) 22...Kb6 23.Bg7 (23...Bb5 24.Bh8 Bf1 25.Bd4+–) 1–0. Wall,Bill – Vanman, internet, 2003.

3.Bd4 e6=+ 4.Bb2 d5 (4...Bb4?? 5.Bg7 Qg5 6.Bh8 Bg2 7.Nh3 Bh3 8.Bh3+–) 5.d4 (5.Nf3!?=+) 5...Bb4–/+ 6.c3 (6.Bc3 Be7–/+) 6...Ba5 (6...Bd6!? 7.Nf3–+) 7.Nd2–/+ Nf6 8.Qa4 Bc6 9.Qd1 0–0 10.Ba3 (10.Nb3 Ba4–/+) 10...Re8 (better 10...Bc3 11.Rc1 Ne4 12.Rc3 Nc3–+) 11.Rb1? (better 11.Qc2–/+) 11...Bc3–+ 12.Rc1 (12.Ngf3 Ne4 13.Bc1 e5 14.de5 Nd7–+) 12...Bd2 (12...Ne4!? 13.Ngf3 Qf6 14.Rc3 Nc3 15.Qc2–+) 13.Kd2 (better 13.Qd2 Bb5 14.Nf3–+) 13...Nbd7?? (13...Bb5 14.Ke1–+) 14.Ke1?? (better 14.Rc6 e5 15.Bb2=) 14...Bb5–+ 15.Qb3 (15.Nf3 Rc8–+) 15...Ba6 (15...Bc4 16.Qb2–+) 16.Qd1 (16.Nf3 Bc4 17.Qb2 Ne4–+) 16...Rc8 17.Qb3 (17.Nf3 c5–+) 17...c5 18.dc5 Nc5 19.Qb4 Nce4 20.f3 Rc1 (20...Rc1 21.Bc1 Nc5–+) 0–1. alt20 – Doreng7, lichess.org, 2015.

3.e3 Bg2?? 4.Bg2 Nc6 5.b5 Rb8 6.bc6 Nf6 (6...d5 7.Qe2+–) 7.Nc3 (7.cd7 Nd7 8.Bc6 f6+–) 7...e6 (7...d5 8.e4 d4 9.Nb5+–) 8.Nb5 (8.cd7 Nd7 9.Qe2 b5+–) 8...Bd6 (8...a6 9.Bf6 gf6 10.cd7 Qd7 11.Nd4+–) 9.Na7 0–0 10.cd7 Qd7 11.Nc6 e5 (11...Ra8 12.Bf6 gf6 13.Qg4 Kh8 14.Qh4+–) 12.Nb8 Rb8 13.Nf3 (better 13.Ne2 Rd8+–) 13...e4 (13...Qf5 14.d3+–) 14.Rg1 (better 14.Ng5 Qe7 15.Bf6 Qf6 16.Ne4 Qe7+–) 14...ef3 15.Bf3 (15.Qf3 Ne8+–) 15...Be7 (15...Qe6 16.Rg2+–) 16.Bg4 (16.Be5 Qd8+–) 16...Qd6 17.Qf3 (17.Rg2 Rd8+–) 17...Qh2 (17...Rd8 18.0–0–0+–) 18.Ke2 (18.Rg3!? Qh4+–) 18...Qd6 19.Bf5 g6 20.Bd3 (better 20.Kd1+–) 20...Bf8 (20...c6 21.Rab1+–) 21.Rh1 (better 21.Bf6 Bg7 22.Bg7 Kg7+–) 21...Bg7 22.Bf6 (22.Rh3 b5+–) 22...Bf6 (22...Qf6 23.Qf6 Bf6 24.Rab1+–) 23.Rab1 (better 23.Rag1 Kg7 24.Qh5+–) 23...Ra8 (23...Bg7+–) 24.Qa8 Kg7 25.Qf3 (25.Rh7! Kh7 26.Rh1 Qh2 27.Rh2 Bh4 28.Rh4 Kg7 29.Qh8) 25...h5+– 26.Qh3 (26.Be4 h4+–) 26...Qe7 (26...h4+–) 27.Qf3 Kh6?? (27...Qd6 28.Bc4 Qc5+–) 28.Rbg1+– Bg5 29.Rh3 (29.Rh5 gh5 30.Qf5 Kg7 31.Rg5 Qg5 32.Qg5 Kf8 33.Qf6 Ke8 34.Bc4 Kd7 35.Qf7 Kc8 36.Qe8 Kb7 37.Bd5 c6 38.Qc6 Kb8 39.Qb7) 29...Bf6 30.Rgh1 (30.Rh5 Kg7 31.Qh1 Qd7 32.Rg6 Kf8 33.Rf6 Qg4 34.Ke1 Ke7 35.Rf7 Kf7 36.Qd5 Kf8 37.Rh8 Ke7 38.Rh7 Qg7 39.Rg7 Kf6 40.Rf7) 30...Qe5 (30...Kg7 31.Be4+–) 31.Rh5! gh5 (31...Qh5 32.Rh5 Combination; 31...gh5 32.Bc4 Pinning (32.Bc4 Decoy)) 32.Bf5 (better 32.Qg4 Qg5 33.Qd7+–) 32...Bg5 (32...h4+–) 33.Rh5 (33.Qh5 Kg7 34.Qh8) 33...Kg7+– 34.Rg5 Kf8 35.Qf4 (35.Qa8 Ke7 36.f4 Qd6+–) 35...Qb5 36.Kf3 (better 36.Bd3 Qd7+–) 36...Qb1 37.Be4 (37.Qc7 Qd1 38.Kf4 Qd2 39.Qb8 Ke7 40.Qa7 Kf6 41.Qb6 Ke7 42.Qc7 Kf8 43.Qc5 Qd6 44.Qd6 Ke8 45.Rg8) 37...Qd1 38.Kg3 Qg1 39.Bg2 Qe1 (39...Qd1 40.Qf6 Qd2 41.Qh8 Ke7 42.Re5 Kd6 43.Qf6 Kd7 44.Bh3) 40.Rf5 (40.Qf6 Qd2 41.Qh8 Ke7 42.Re5 Kd6 43.Qf6 Kd7 44.Bh3) 40...Qd2 (40...Qa1 41.Rf7 Kg8 42.Rf8 Kg7 43.Qf7 Kh6 44.Qe6 Kg7 45.Rg8 Kh7 46.Qg6) 41.Rf7 Ke8 (41...Kg8 42.Rf8 Kg7 43.Qf6 Kh7 44.Rh8) 42.Rf8 (42.Bc6 Qd7 43.Bd7 Kd8 44.Qf6) 42...Ke7 (42...Kd7 43.Qf5 Kd6 44.Rf6 Ke7 45.Qe6 Kd8 46.Rf8) 43.Qf7 (43.Qf6 Kd7 44.Rd8) 43...Kd6 44.Rd8 (44.Re8 Qe3 45.fe3 Kc5 46.Re5 Kd6 47.Qe6) 44...Kc5 45.Rd2 Kb5 (45...Kb4 46.Qb3 Kc5 47.a4 c6 48.Qc3) 46.Qb3 Ka6 (46...Kc5 47.a4 c6 48.Qc3) 47.Rd8 (47.Qa4) 47...Ka7 (47...c6 48.Rb8 Ka5 49.Ra8) 48.Ra8 (48.Qa4) 1–0. FeegLood (2725) – JackandBones (1855), lichess.org, 2015.

3.f3 a5 4.a3 ab4 5.ab4 Ra1 6.Ba1 c5 (6...e6 7.e4=) 7.bc5 bc5 8.Nc3 Qa5 (8...d5 9.e4 d4 10.Nb5=) 9.e4 e6 10.Bc4 (better is 10.Nh3+=) 10...d5 (better is 10...Qb4 11.Bb5 Nc6=) 11.ed5+/– ed5 12.Bd5 Bd5 13.Nd5 Ne7 14.Ne7 Be7 (14...Ke7 15.Nh3 Kd8+–) 15.Ne2 (better is 15.Bg7!? Rg8 16.Bc3+–) 15...0–0+= 16.0–0 c4 17.Bc3 Bc5 18.Kh1 Qc7 19.Qa1 f6 20.Nd4 Nc6? (20...Bd4 21.Bd4 Nc6 22.Be3+/–) 21.Nc6?? (better is 21.Ne6 Qa7 22.Nf8 Bf8 23.Qa7 Na7 24.Rb1+–) 21...Qc6+= 22.Bd4 Ra8 23.Qb2 Bd4 24.Qd4 Rc8 (24...Ra2 25.c3+/–) 25.c3 (25.Re1 Ra8+/–) 25...Qc5+= 26.Qc5 Rc5 27.Rd1 Kf7 (27...Rd5 28.h3+=) 28.d4+/– cd3 29.Rd3 Ke6 30.g3 (30.Kg1 f5+/–) 30...g5 (30...Rd5!? 31.Re3 Re5 32.Re5 Ke5=) 31.Kg2+/– h5 32.h3 Rd5 (32...Rd5 33.Rd5 Kd5+–). Fournier,Frederic – alexandermate, Partie evaluee, 1m + 0s, 2009.

3.f3 c5 4.b5 (4.bc5 bc5 5.e4 Nc6=) 4...d5 5.e3 Nd7 6.Qe2 (6.f4=) 6...d4 (better 6...a6!?=+) 7.ed4+= Qc7 8.dc5 Qc5 9.Nh3 (better 9.Nc3+–) 9...Ne5?? (better 9...Qc2 10.d4 Qe2 11.Be2 e6=) 10.Nc3 (better 10.Qe5 Qc2 11.Na3 Qc5+–) 10...0–0–0? (better 10...e6!?+–) 11.Na4 Qc2?! (11...Qb4 12.Nb6! ab6 13.Be5 e6+–) 12.Rc1 (12.Rc1 Nd3 13.Qd3 Qc1 14.Bc1 Rd3 15.Bd3+–) 1–0. alt20 – jmwed, lichess.org, 2015.

3.f3 c6 4.e4 e6 5.d4 (better is 5.a3!?=) 5...Bb4–/+ 6.Nd2 Bd2 7.Qd2 Nf6 (7...d5 8.Ne2+=) 8.Bd3 (8.e5 Nd5+=) 8...0–0 (8...Ba6 9.e5 Bd3 10.ef6+=) 9.Ne2 (9.Ba3 d6 10.e5 Ne8=) 9...d6 10.0–0 e5 (better is 10...Ba6!?+=) 11.de5+= de5 12.Be5 Nbd7 13.Bb2 Qe7 14.Qf4 Rad8 (14...Rfd8 15.Rfd1+=) 15.Qg3 (15.Qc7 Bc8+/–) 15...g6? (15...Rfe8 16.Nd4 Nh5 17.Qg4=) 16.Qg5 (16.Qc7!? Bc8 17.Nd4+–) 16...Kg7 (16...Rfe8 17.Rab1+=) 17.Ng3 h6?? (better is 17...Qc5 18.Qc5 Nc5+= (18...bc5? 19.e5 Nd5 20.Ne4+–)) 18.Nf5+– Kh7 19.Qh6 (19.Ne7?! hg5 20.e5 Ng8 21.Ng8 Kg8+=) 19...Kg8 20.Qg7 (20.Ne7) 1–0. Fournier,Frederic (1645) – Krand, Active, 2006.

3.f3 d5 4.e3 e6 5.b5 c6 6.Nc3 a6 (6...Nf6 7.Bd3 a6 8.a4 Bd6 9.Nh3 Nbd7 10.0–0 Ne5) 7.a4 ab5 (7...Nf6 8.Bd3+= Bd6 9.Nge2 Qc7 10.f4 Nbd7) 8.ab5= c5 (8...Nf6 9.Ra8 Ba8 10.Nh3 Bd6) 9.Ra8 Ba8 10.f4 (10.Nh3 Nd7) 10...Nf6 11.Nf3 Ne4 (11...Bd6!?=) 12.Ne4+= de4 13.Ng5 h6 14.Qh5 g6 (better is 14...Qe7!? 15.Bc4 g6+/–) 15.Qh3+– Be7? (better is 15...Rg8 16.Ne6! Qd7+–) 16.Ne6 (16.Bh8?! hg5 17.Be5 gf4 18.Qh8 Bf8 19.Bf4 Nd7+–) 16...fe6 (16...Qc8 17.Bh8 Qe6 18.Qe6 fe6 19.g4+–) 17.Bh8 Kd7 18.Be5 h5 (18...Qe8 19.Bc4 Bd6 20.0–0+–) 19.Bc4 Qg8 20.Ke2 g5 (20...Bd6+–) 21.Ra1 Bb7 (21...Bd5 22.Bd5 g4 23.Ra7 Ke8 24.Qh5 (24.Bb8 gh3 25.Bc6 Kf7–/+) 24...Qf7 25.Qg4 ed5 26.Qc8 Bd8 27.Rf7 Kf7 28.Qd8 Nd7 29.Qd7 Kf8 30.Bg7 Kg8 31.Bh6 d4 32.Qg7) 22.Ra7 g4 23.Rb7 Kc8 24.Rb8 (worse is 24.Bb8 gh3 25.Re7 Qg4 26.Kf2 Qh4 27.g3 Qe7+=) 1–0. marekt – 2cvdolly, internet, 2011.

3.f3 g6?? 4.Bh8+– f6 5.Nh3 (5.h4 Nh6 6.h5 g5+–) 5...Nh6 6.Nc3 (better is 6.c3 Nf7+–) 6...d5 (6...Nf7+–) 7.Nf4 e5 8.Nfd5! Bd5 9.Bf6! Qf6 10.Nd5 Qc6 (10...Qh4 11.g3 Qd8+–) 11.e4 a6 12.c3 b5 (12...Ng8 13.b5! Qd6 14.Qa4+–) 13.a4 Nd7 (13...ba4 14.b5 Qd6 15.Qa4+–) 14.ab5 ab5 (14...Qb7+–) 15.Ra8 Qa8 16.Nc7 Kd8 17.Na8 (17.Na8 Bd6 18.Bb5+–) 1–0. pierre – kef, internet, 2010.

3.Nf3 d5 4.e3 e6 5.a3 a5 6.c4 (6.b5 Nf6=) 6...ab4 7.cd5 (7.ab4 Ra1 8.Ba1 dc4 (8...Bb4?? 9.Bg7 Nf6 10.Bh8+–) 9.Bc4 Nf6= (9...Bb4 10.Bg7 Nd7 11.Bh8+–)) 7...Bd5=+ 8.ab4 Ra1 (8...Bb4?? 9.Ra8 Ba8 10.Bg7+–) 9.Ba1 Nf6 (9...Bb4 10.Bg7 Bf3 11.Qf3 Bd2 12.Nd2+–) 10.Nc3 Bb7 (10...Bb4? 11.Qa4 Nbd7 12.Qb4+–) 11.Qa4 Nbd7 12.Be2 Be7 (12...Qa8 13.Qa8 Ba8 14.b5=) 13.0–0 0–0 14.d4 Nd5 15.Nd5 Bd5 16.Bb2 f5 (16...Nb8 17.Ra1=) 17.Ra1 (17.b5 Bd6=) 17...Rf6 (17...f4 18.b5=) 18.b5+= Rh6 19.Ba3 Nf6 (19...Bd6 20.Bd6 cd6 21.Qc2+=) 20.Be7+/– Qe7 21.g3 (21.Qa7!?+/–) 21...Ng4+= 22.Qa7 Rh5? (better is 22...Bf3!? 23.Qb8 Qf8 24.Qf8 Kf8 25.Bf3 Nh2+=) 23.Rc1 h6 24.Rc7 Qf6 25.h4 f4 26.Qb8 Kh7 27.Bd3 Rf5 28.h5 Bf3 29.Rc8 g5 30.Rc7 Qg7 31.ef4 Nf6 32.Rg7 Kg7 33.Qa7 (33...Kf8 34.Bf5 ef5 35.Qa3 Ke8 36.Qf3+–) 1–0. Creatchy – willow27, ChessWorld.net, 2005.

3.h4 e6 4.h5 h6 5.Nf3 Nf6 6.a3 c5 7.b5 (7.Bc3 cb4 8.ab4 Be7=+) 7...d5 8.e3 Nbd7 (8...Bd6 9.Be2=+) 9.Nc3 (9.Ne5 Ne5 10.Be5 Bd6=+) 9...Bd6–/+ 10.Ne2 (10.Be2 0–0–/+) 10...Qe7–/+ (10...0–0 11.Rb1–/+) 11.a4 e5 (11...0–0 12.a5–/+) 12.Ng3 Qe6 13.Nh4 e4 (13...0–0 14.Nhf5=+) 14.Ngf5 (14.Nhf5 0–0=+) 14...Bf8 (14...0–0 15.Nd6 Qd6 16.d4=+) 15.g3= g5 (better 15...Kd8=) 16.hg6+– fg6 17.Ng6 Qf5 18.Nh8 Ng4 (18...d4 19.Be2+– (worse 19.ed4 e3 20.de3 Bh1–/+)) 19.Qe2 0–0–0 (19...Nge5 20.Kd1 Ng4 21.Ke1+–) 20.Bh3 h5 21.0–0 (21.a5 d4 22.a6=) 21...Bd6 (21...d4 22.ed4 Bg7 23.Rfb1=) 22.a5 (better 22.f3 ef3 23.Qf3 (worse 23.Rf3 Qc2 24.Nf7 Bc7+=) 23...Qf3 24.Rf3+–) 22...d4? (22...Nde5 23.ab6 ab6–/+) 23.ed4+– Rh8 (23...Qf6 24.dc5 Qb2 25.c6 Qh8 26.cb7 (26.cd7?! Rd7 27.Ra4 Bc5+=) 26...Kb8 27.ab6 Nb6 28.Qe4+–) 24.ab6 Rg8 (24...ab6 25.dc5 Be5 26.Be5 Nde5+–) 25.ba7 Ba8 26.b6! Nb6 27.Ra6 Bc7 28.dc5 (better 28.Bg2 Kd8 29.d3+–) 28...Nd5? (28...Qc5 29.Bg2 Qc2 30.Bd4+–) 29.Rh6! Nf4? (29...Nh6 30.Qh5 Double attack (30.Bf5 Pinning; 30.Bf5 Deflection; 30.Qh5 Decoy)) 30.Qa6 Kd8 31.Bf6 (31.Bg4 Qg4 32.Bf6 Ke8+–) 31...Ke8 (31...Kd7 32.Bg4 hg4 33.gf4+–) 32.Bg4 Qg4 (32...hg4 33.gf4 Kf7+–) 33.Qb5 (33.Rb1 Qf5 34.Rb8 Kf7 35.Qa2 Bd5 36.Rg8 Kg8 A) 37.gf4?! Qg4 (37...Ba2 38.a8Q Kf7 39.Qa2 Ke8 40.Rh8 Kd7 41.Qa4 Ke6 42.Qc6 Kf7 43.Qe8 Kf6 44.Rf8 Kg7 45.Qe7 Kh6 46.Rh8 Kg6 47.Rg8 Kh6 48.Qg7) 38.Kf1 Qd1 (38...Ba2 39.a8Q Kf7 40.Qa2 Qe6 41.Rh7 Kf8 42.Qe6 Bf4 43.Bg7) 39.Kg2 Qf3 (39...Ba2 40.a8Q Kf7 41.Qa2 Ke8 42.Qe6 Kf8 43.Rh8) 40.Kg1 Qg4 (40...Ba2 41.a8Q Kf7 42.Qa2 Qb3 43.Qb3 Ke8 44.Qe6 Kf8 45.Rh8) 41.Kh1 Qh3 (41...Ba2 42.a8Q Kf7 43.Qa2 Qe6 44.Rh7 Kf8 45.Qe6 Bf4 46.Bg7) 42.Kg1 Qg4= (42...Ba2 43.a8Q Kf7 44.Qa2 Qe6 45.Rh7 Kf8 46.Qe6 Bf4 47.Bg7); B) 37.a8Q Kf7 38.Q2d5 Nd5 39.Be5+–) 33...Kf7+= 34.Re1?? (34.Qb3 Bd5 35.a8Q Ra8 36.c4–+) 34...Qh3–+ 35.Qf1?? (35.Rh7 Kg6 36.Qf1 Kh7 37.Qh3 Nh3 38.Kf1 Nf2 39.Kf2–+) 35...Rg3! 36.fg3 (36.fg3 Qg3 Mate attack) 36...Qg3 37.Kh1 e3 (37...e3 38.c6 Bc6 39.Qf3 Bf3) 0–1. FeegLood (2445) – RobertFontaine (2450), lichess.org, 2015.

3.a3 a5

4.b5 c6 5.a4 (5.Nf3 cb5 6.Nc3 b4 7.ab4 ab4=) 5...cb5 (5...Nf6 6.Nf3=) 6.ab5 d6 (6...Nf6 7.Nf3=) 7.e3 (7.Nc3 e5=) 7...Nf6 8.Nf3 Nfd7 (8...Nbd7 9.Ra4=) 9.Be2 Nc5 (9...e5 10.0–0+=) 10.0–0+= Nbd7 (10...e6 11.c4+=) 11.d3 e6 12.Nbd2 (12.Na3 Qc7+=) 12...e5 (12...Qc7 13.c4+=) 13.c4 (13.d4 Ne4+/–) 13...Ne6+= 14.d4 ed4 (14...e4 15.d5 ef3 16.de6 fe2 17.ed7 Qd7 18.Qe2+=) 15.Nd4+/– Nd4 (15...Ndc5 16.Nc6 Bc6 17.bc6+=) 16.Bd4 d5 17.Nf3 (17.Bf3 Nc5+/–) 17...dc4 18.Bc4 Be7 (18...Qe7 19.Ra4+/–) 19.Qb3 (better is 19.Bg7!? Rg8 20.Bd4+/–) 19...0–0+= 20.Rad1 (20.Ne5 Ne5 21.Be5 Bd6 22.Bd6 Qd6=) 20...Qe8 (20...Bf3 21.gf3 a4 22.Qd3=) 21.Qb2 Bf6 22.Bf6 Nf6 23.Nd4 Ne4 24.Be2 Qe5= 25.Bf3 f5 26.Qb1 Rad8 27.Qc2 Rc8= 28.Qb2 Rc4 29.Rc1 Rb4 30.Qe2 Qb8 31.Rc2 Rc8 32.Rfc1 Rc2+= 33.Qc2 Nd6 34.Bb7 Nb7? 35.Nc6+– Qf8 36.Nb4 ab4 37.Qc8 Nc5 38.Qf8 Kf8 39.Rb1 Kf7? 40.Rb4 Ke6 41.Rd4 Ke5 42.g3 f4 43.gf4 Kf5 44.Kg2 (44...g6 45.Rd6+–; 44.Rd6 Na4+–) 1–0. Onkel_Luis – peondamanegra, ICC, 2003.

4.b5 Nf6 5.Nf3=.

3.a3 a6

4.e3 d6 5.Nf3 e6 6.Be2 Qe7 (6...Nf6!?=) 7.0–0+= Nd7 8.c4 h6 9.d4 f6 (9...Ngf6 10.Nc3+=) 10.Nbd2 (10.Nh4 Rh7+–) 10...g5 (10...f5 11.Bd3+/–) 11.e4 Bg7 12.d5 e5 13.Re1 0–0–0 14.h3 h5 15.c5 (better is 15.Nh2!?+/–) 15...dc5= 16.bc5 (16.Rc1!?=) 16...Nc5+= 17.Nb3 (17.Rc1+=) 17...Nb3?? (17...Ne4 18.Ba6 Ba6 (18...Rd5?? 19.Bb7 Kb7 20.Qd5 c6 21.Qe4+–) 19.Re4 Bb7–+) 18.Qb3= g4 19.hg4 (better is 19.Nh4!? Qd7 20.Nf5+=) 19...hg4+= 20.Nh2 Bf8 (20...f5 21.ef5 Nf6+= (worse is 21...Rd5 22.Ba6 Rd6 23.Bb7 Kb7 24.Ng4+/–)) 21.Bg4= Kb8 22.f3 (better is 22.Re3!?=) 22...Qh7+= 23.Kf2?? (better is 23.Nf1+=) 23...Qh2 24.Rh1 (24.Rac1–+) 24...Qf4 (better is 24...Bc5 25.Ke2 Qg2 26.Kd3 Rh1 27.Rh1 Qh1–+) 25.Bc1?? (25.Rh8 Nh6 26.Ke2 Ng4 27.Rh3+=) 25...Qc1 26.Rac1+– Rh1 27.Rh1 Ne7 28.Be6 Ng6 29.Rh6 Nf4?? 30.Rh1 (30.Rh1 Ng6 31.g3+–) 1–0. Fournier,Frederic (1640) – vahid, Active, 2005.

4.e3 Nf6 5.Nf3 g6 (5...e6 6.Be2=) 6.d3 (6.Be2 Bg7=) 6...Bg7 7.Nbd2 (7.Be2 0–0=) 7...0–0 (7...a5 8.Ne4=) 8.c4 (8.Be2 d6=) 8...d6 9.Qc2 (9.Be2 e5=) 9...Nbd7 (9...Re8 10.Be2=) 10.Be2 e5 (10...h6 11.0–0=) 11.h4 (11.0–0 Qe7=) 11...Qe7 Black prepares the advance e4 (11...a5=) 12.0–0–0 (12.0–0!?=) 12...Rfe8 Black intends e4 (12...c5 13.bc5 Nc5 14.Rde1–/+) 13.Rdg1 (13.Ne4 h5=+) 13...a5 (13...h5 14.e4=+) 14.g4 (14.b5!?=+) 14...e4 15.de4 Ne4 (15...ab4 16.ab4 Ra2 17.Nd4–+) 16.Bg7 Kg7 17.Qb2 (17.Ne4 Be4 18.Qc3 Kg8=+) 17...Qf6 (17...Kg8!? 18.Ne4 Be4–/+) 18.Qf6= Ndf6 (better 18...Kf6 19.Ne4 Be4 20.g5 Ke7=) 19.Rf1?? (better 19.g5 Nd7 20.Ne4 Be4 21.b5=) 19...Ng4 (19...Nd2 20.Kd2 ab4 21.ab4 Ra2 22.Kd1–+) 20.Rhg1 (better 20.Ne4 Be4 21.b5–+) 20...Ngf2 21.Nd4 (21.Ne4 Ne4 (21...Re4?! 22.Rf2 Re3 23.ba5–/+) 22.b5 f5–+) 21...Nd2 (21...ab4 22.Ne4 Ne4 23.ab4–+) 22.Rf2 Ne4 23.Rf4 (23.Rff1 ab4 24.ab4 Ra2–+) 23...ab4 24.Nf5 (24.Rgf1 f5 25.ab4–+) 24...Kf8 25.Nh6 The mate threat is Rxf7 25...f5 (better 25...f6 26.a4–+) 26.Nf5 gf5 (better 26...Kg8!? 27.Bh5 Nc5 28.Rfg4 Nd3 29.Kd2–+) 27.Rf5 Ke7 28.Rg7 Kd8 29.Rff7 (29.ab4 Ra3 30.Rff7 Bc8 31.Rc7 Rc3 32.Kd1 d5–+) 29...Bc6 (29...Bc8 30.ab4 Ra1 31.Kb2–+) 30.ab4 Ra7?? (better 30...Nc3 31.Bg4 Na2 (31...Re3?! 32.Kd2 Re4 33.Kc3 Ra3 34.Kd2=) 32.Kd1 Nb4–+) 31.b5=+ Ba8 (31...Nc3 32.Bg4 h5=) 32.Bg4= Nc5 33.Rh7?? (33.Rd7 Nd7 34.Rd7 Kc8 35.Re7 Kd8 36.Rd7 Kc8 37.Re7 Kd8 38.Rd7=) 33...Be4?? (33...Ra4 34.Be2–+) 34.Rhg7?? (better 34.Rd7 Nd7 35.Rd7 Kc8 36.Re7 Kd8 37.Rd7 Kc8 38.Re7 Kd8 39.Rd7=) 34...Ra1–+ 35.Kb2 (35.Kd2 Ra2 36.Kc3–+) 35...Ra7?? (35...Rb1!? 36.Kc3 Rb3 37.Kd2 Rb2 38.Ke1–+) 36.Bh5?? (better 36.Kc1=) 36...Nd3 37.Kc3 (37.Kb3 Rh8 38.Bg4 Ne5–+) 37...Ne5 38.Rf6 (38.Rf4 Ra3 39.Kd2 Nc4 40.Ke1–+) 38...Bd3?? (better 38...Rh8 39.Be2 Ra3 40.Kd2 Bd3 41.Bd3 Rd3 42.Ke2 Rc3–+) 39.Be8= Ke8 40.Rh6 (better 40.Rf4!?=+) 40...Kf8–/+ 41.Rg5 Nf7 (better 41...Ra3 42.Kb4 Ra1 (42...Nc4?! 43.Rf6 Ke7 44.Rf4=) 43.Rf6 Ke7–+) 42.Rf6= Ke7? (better 42...Ra3 43.Kb4 Ra1=) 43.Rf7!+– Kf7 44.Kd3 Ra3 (44...Ra1 45.Rg4+–) 45.Kd4 Ra4 (45...Kf6 46.Rg8+–) 46.Rg4 (46.h5 Kf6 47.Rg6 Kf7+–) 46...Ke6 (46...Ra8 47.Kd5 Re8 48.h5 Re3 49.Kc6+–) 47.Rf4 (47.h5 Ra1 48.Rg7 Rd1 49.Ke4 Rh1+–) 47...Kd7? (47...d5 48.Kd3 Ra3 49.Ke2 dc4 50.Rc4+–) 48.Re4 (better 48.Rf7!? Ke6 49.Rc7 Ra1+–) 48...c5 (48...Ra1 49.Rg4+–) 49.Kd5 (49.bc6 Kc6 50.h5 b5+–) 49...Ra3 (better 49...Ra1 50.Rg4 Rd1 51.Ke4 Rh1+–) 50.Rd4?? (better 50.Rg4 Rd3 51.Ke4+–) 50...Rd3 (50...Re3 51.Re4 Rd3 52.Rd4 Rd4) 51.Rd3 Ke7 52.Ke4 Kd7 53.Rd5 Kc7 54.Rf5 (54.Rf5 Kd8 55.h5 Kc8 56.h6 Kd8 57.h7 Ke7 58.h8Q d5 59.cd5 Kd7 60.Qg7 Kd6 61.Rf6; 54.h5 Kb8 55.h6 Ka8 56.h7 Kb7 57.Rf5 Kc8 58.h8Q Kd7 59.Qg7 Ke6 60.Qf7) 1–0. TwelveTeen (2570) – jimakos (2555), Time forfeit, 2017. (=1.a3 a6 2.b4 b6 3.Bb2 Bb7)

4.Nf3 Nc6 5.g3 Nf6 6.Bg2 g6 7.0–0 Bg7 8.Nc3 (8.c4 0–0+=) 8...0–0= 9.Qc1 Qc8 10.e3 d6 11.Ne2 Qd7 (11...e5 12.d4=) 12.Ned4 (12.d4 g5=) 12...Nd4=+ 13.Bd4 c5 14.Bf6 Bf6 15.c3 cb4 16.ab4 Rfc8 17.Nd4 (17.Qc2 e5=+) 17...Bg2 18.Kg2 a5 19.Qc2 (19.Qb1!?=+) 19...ab4–/+ 20.Ra8 Qb7 21.Kg1 Qa8 22.Qb2 bc3 23.dc3 Qa5 24.Ne2 (24.Rb1!?–/+) 24...Bc3–+ 25.Nc3 Rc3 26.Ra1 Qc5 27.Ra8 Kg7 28.Ra3?? (better 28.Ra6–+) 28…Qa3 (28...Qa3 29.Qa3 Ra3–+) 0–1. Sjaak1 (1890) – Kabatana_Michael (1900), lichess.org, 2020. (=1.a3 b6 2.b4 Bb7 3.Bb2 a6)

3.a3 c5

4.Nf3 cb4 5.ab4 Nc6 (5...Nf6=) 6.e3 (better 6.b5!? Nb4 7.c3+=) 6...Nb4=+ 7.c4 (7.Ra4 a5=+) 7...a5 (7...e6 8.Nc3–/+) 8.Nc3=+ Nf6 9.d4 g6 (9...e6 10.Be2–/+) 10.Be2=+ Bg7 11.0–0 0–0 12.e4? (12.Ba3 Nc6=) 12...e6 (better 12...Ne4!? 13.Re1 e6–+) 13.e5 Ne4 14.Ne4 Be4 15.Ba3 Nc2?? (15...f6 16.Re1=+) 16.Ra2?? (better 16.Bf8 Bf8 17.Rc1+=) 16...Na3–/+ 17.Ra3 d5 (17...f6 18.Re1–/+) 18.Nd2=+ Bf5 (18...f6 19.Ne4 de4 20.Bg4–/+) 19.cd5 (better 19.g4!? dc4 20.gf5+–) 19...Qd5–/+ 20.Nf3 (20.Bf3 Qd4 21.Ba8 Ra8–/+) 20...Rab8 (20...b5 21.Qd2 a4 22.Rd1–+) 21.Qb3 (21.Qa1 Be4–/+) 21...Be4 (21...Qb3 22.Rb3 Rfd8 23.Ra1–+) 22.Qd5 (22.Bc4!? Qb7 23.Be2–/+) 22...Bd5–+ 23.Rb1 Rb7 (23...Rfc8!? 24.Ra4–+) 24.Ba6–/+ Rbb8 25.Bd3?? (25.Be2 Rfc8 26.Kf1–+) 25...Rfc8 (25...Bf3 26.gf3 Rfd8 27.Ra4–+) 26.Raa1 Bf8 27.h3 (27.Ne1 Bb4–+) 27...Bb4 28.Ne1 Rc3 (28...Bc3 29.Ra4–+) 29.Bf1 (29.Kf1 Kg7–+) 29...Rbc8 (29...Be4 30.Rd1–+) 30.Nd3 Bc4 (better 30...Be4 31.Nb4 Bb1 32.Rb1 ab4 33.Rb4 Rb8–+) 31.Nb4= ab4 32.Rb4 Bf1 (32...b5 33.g3= (worse 33.Rb5 Bb5 34.Bb5 Rc1 35.Rc1 Rc1 36.Bf1 Rd1–+)) 33.Kf1+= Rc1? (better 33...R8c4!? 34.Rc4 Rc4=) 34.Rc1+– Rc1 35.Ke2 Rc2 36.Kd3?? (36.Ke3 h5+–) 36...Rc6?? (better 36...Rf2 37.g4 Rf3 38.Ke4 Rh3 39.Rb6 h5 40.gh5 gh5–/+) 37.Rb6?? (better 37.Rc4 Rc4 38.Kc4+–) 37...Rb6–+ 38.Kc2 Rb1 (better 38...f6 39.ef6 Kf7–+) 39.Kb1+– Kf8 40.Kc2 Ke7 41.Kd3 Kd7 42.Kc4 Kc6 43.f4 h6 (43...h5 44.g4 h4 45.d5 ed5 46.Kd4+–) 44.g4 g5 (44...Kc7+–) 45.fg5 (better 45.f5 ef5 46.d5 Kd7 47.gf5+–) 45…hg5 0–1. alddhsfd (1875) – redjie9920 (1860), lichess.org, 2019. (=1.a3 b6 2.b4 Bb7 3.Bb2 c5)

4.Nf3 e6 5.b5 (5.bc5 bc5 6.e3 Nf6=) 5...Nf6 6.a4 (6.e3 d5=) 6...g6 (6...Be7 7.e3=) 7.e3 Bg7 8.d4 0–0 (8...cd4 9.Bd4 d6 10.Be2=) 9.dc5 bc5 10.Nbd2 d5 (10...a6 11.Nb3 Qe7 12.Be2=) 11.a5 a6 12.b6 Nc6 13.c4 (13.Be2 Rb8+=) 13...d4 (13...Rc8 14.Be2=) 14.ed4 cd4 15.c5 (15.Bd3!?=) 15...e5=+ 16.Bc4 e4 17.Ng5 e3 (17...Qe7 18.Nb3 Ne5 19.c6 (19.Qd4 Nfg4 20.Qd6 Qg5–+) 19...Nc4 20.cb7–/+) 18.fe3= Ng4?? (better 18...Qe7 19.e4 Qc5 20.Nf7 Rf7=) 19.Qg4 (better 19.Nf7 Qh4 20.g3+–) 19...de3 20.0–0 Bb2? (20...Qd2 21.Bg7 Kg7+–) 21.Rf7 (21.Nf7?! Qe7 (21...Qd2?? 22.Rad1 e2 23.Rd2 ef1R 24.Bf1+–) 22.Rae1 Bc3 23.Nd6 Kg7+–) 21...Rf7 22.Nf7 (better 22.Bf7 Kh8 23.Qh4 Qg5 24.Qg5 Ba1 25.Nb3+– (25.Qe3?? Bd4 26.Qd4 Nd4–+)) 22...Qd4?? (22...Qd2 23.Rf1 Na5 24.Be6=+) 23.Ne5 (23.Nd6 Kh8 24.Qd4 Bd4 25.Nb3 Ba1 26.Nb7+– (26.Na1?! Na5 27.Bf1 Bc6=+)) 23...Kg7=+ 24.Qd4 Bd4 25.Nc6 Bc6 (25...Ba1?! 26.Nb3 Bc6 27.Na1–+) 26.Nb3 Ba1 27.Na1 Rd8 28.Be2 Rd2 29.Kf1 Rb2 30.Ba6 (30.Ke1 Rb1 31.Bd1 Ra1 32.Ke2–+) 30...Bg2 31.Ke1 Bf3 (31...Bf3 32.Nb3 Rb1 33.Nc1 Rc1) 0–1. TwelveTeen (2635) – Sigma_Tauri (2680), lichess.org, 2018.

3.a3 Nc6

4.e3 d5 5.Ne2 Qd6 6.Nf4 0–0–0 (6...e5 7.Nd3 a6 8.Be2=) 7.Be2 (7.b5 Ne5+=) 7...f6 (7...e5 8.Nd3 d4 9.0–0=) 8.Bf3 (8.b5 Ne5 9.Be5 fe5+=) 8...Nh6 (8...e6 9.d4=) 9.Bd5 (better 9.Nd5!? Qd7 10.Ndc3+–) 9...e5 10.Bc6?? (better 10.b5!? ef4 11.Bc6 Bc6 12.bc6 Qc6 13.0–0=) 10...Bc6 (better 10...Qc6 11.Ne2 Qg2–+) 11.Nh3?? (better 11.b5 Bb5 12.Nh5–/+) 11...Be7 (better 11...Bg2 12.Rg1 Bh3–+) 12.0–0+= Rhe8 13.Qh5 Bd7 14.f4 ef4 15.Nf4 Bg4 16.Qh4 f5 (16...Qc6 17.Bc3+=) 17.Qe1 (17.Qf2 g5 18.Nd3 a6+–) 17...g5 18.Ne2 (18.Nd3 f4+–) 18...Qe6 (18...f4!?+=) 19.Nd4+– Qd5 20.Nc3 Qb7 (20...Qd7+–) 21.Qg3 (better 21.h3!? Bf6 22.hg4 Bd4 23.gf5+–) 21...Bd6 (21...f4 22.Qf2 c5 23.Nb3 fe3 24.de3 (worse 24.Qe3 c4–/+) 24...cb4 25.ab4 Bb4 26.Nb5+=) 22.Qe1 f4 (22...Be7 23.h3 Bf6 24.hg4 Bd4 25.gf5+–) 23.Nce2 (better 23.Ncb5!? Kb8 24.Nd6 Rd6 25.Qf2 fe3 26.de3+–) 23...Bh5 (23...fe3 24.d3=+) 24.Qf2 (24.Nb5 fe3 25.d3 Be5 26.Be5 Re5=) 24...Ng4 (24...fe3!? 25.de3 Bh2 26.Kh1 Be5–/+) 25.Qf3= Qf3 26.Rf3 (26.gf3 Nh2 27.Kh2 fe3 28.Kg2 c5+=) 26...Nh2 (26...fe3 27.h3 ed2 28.hg4 Bg4 29.Rd3 Be2 30.Rd2–+) 27.Kh2? (better 27.Rh3!? Be2 28.Ne2=+) 27...Bf3 28.Nf3 fe3 29.Kg1 (29.Kh3 ed2 30.Nc3 g4 31.Kg4 Rg8 32.Kh5 Rg2–+) 29...ed2 30.Ned4? (better 30.Kf2 Bb4! 31.ab4–+) 30...Bg3?? (better 30...Bf4 31.b5 Be3 32.Kh2 c5 33.bc6 Bd4 34.Bd4 g4 35.Nd2 Rd4–+) 31.Nd2=+ c5 32.N4f3 (better 32.bc5 bc5 33.N4b3–/+) 32...c4?? (32...Re2 33.Nf1 Bf2 34.Kh1–/+) 33.c3 (33.Nc4 Re4 34.Nce5+=) 33...Rd2?? (better 33...Re2 34.Nc4 b5–/+) 34.Nd2+– Re1?? (better 34...Bf4 35.Nc4 Re4+–) 35.Re1+– Be1 36.Nc4 (better 36.Ne4 g4 37.g3 Kd7+–) 36...b5 (36...Bg3 37.b5+–) 37.Ne5 (better 37.Nd6 Kd7 38.Nb5 a6+–) 37...Bg3 38.Ng4 (38.Nf7 Bf4 39.Kf2 g4+–) 38...h5 (38...Bf4 39.Nf6 h6 40.g4+–) 39.Nf6 h4 40.Ng4 (40.Bc1!? g4+–) 40...Kd7 (40...Bf4 41.Kf2 Kd7 42.Kf3+–) 41.Bc1 Kc6 (41...Ke6+–) 42.Bg5 Kd5 43.Be3 (43.Ne3 Ke5+–) 43...Kc4 44.Bd4 Kb3 45.Ne3 Ka3 46.Nd5 (46.Nf5!? Bc7 47.Nh4 Bd8+–) 46...Kb3 47.Nc7 (better 47.Kf1 Kc4 48.Ne7 Bc7+–) 47...Be1?? Attacking the backward pawn on c3 (better 47...Bc7 48.Bf6 Bg3=+) 48.Nb5+– Kc4 (48...a6 49.Nc7+–) 49.Na7 Bc3 (49...Kd5+–) 50.Bc3 Kc3 51.b5 Kb4 52.b6 Kc5 53.b7 Kb6 54.b8Q Kc5 55.Qb5 (55.Qb5 Kd4 56.Nc6 Kc3 57.Qb4 Kc2 58.Qa3 Kd1 59.Qd3 Kc1 60.Nd4 Kb2 61.Qc2 Ka3 62.Qb3) 1–0. Akrapovik – Baghenst0s, lichess.org, 2019.

4.e3 d5 5.Nf3 e5 (5...Nf6 6.Bf6 ef6 7.d4+=) 6.d3 (6.b5 Nce7 7.Be5 Ng6+/–) 6...Nf6 (6...e4 7.Nfd2+=) 7.Ne5 Ne5 8.Be5 Bd6 9.Bd6 Qd6 10.d4 0–0 11.Nd2 c6 12.Bd3 a5 13.ba5 Ra5 14.Qc1 Ba6 15.Ba6 Ra6 16.0–0 Ne4 (16...Rfa8!?=) 17.Ne4+= de4 18.c4 f5 (18...Rfa8 19.Qb1 f5 20.Rd1+/–) 19.Qc2 Ra7 (19...Ra3?? 20.c5 bc5 21.Ra3 cd4 22.Qb3 Kh8 23.ed4 Qd4 24.Qc2+–) 20.a4 Raf7 (20...c5 21.Rfd1+/–) 21.Rac1 (21.Rfb1 c5 22.dc5 bc5+/–) 21...f4 (21...c5 22.Rfd1+/–) 22.c5 (22.Qe4!? Re7 23.Qd3 c5+–) 22...bc5+/– 23.Qc5 (23.Qe4 fe3 24.fe3 Rf6+–) 23...Qg6 (23...Qc5!? 24.dc5 fe3 25.fe3 Rf1 26.Rf1 Ra8+=) 24.Qc4 f3 25.g3 Qg4 26.Kh1 (26.Qc6?? Qh3 27.Qe4 Qg2) 26...Qh3 27.Rg1 Kh8 28.d5 (28.Qb4 Qe6+/–) 28...cd5 (28...Rf6 29.Qf1 (29.Qe4?? Rh6 30.Qh4 Rh4 31.gh4 cd5–+) 29...Qh6 30.dc6 Rc6 31.Rc6 Qc6 32.Qb5+=) 29.Qd5+= Rf6 30.Qe4?? (better is 30.Rc6 Rc6 31.Qc6+=) 30...Rh6–+ 31.Rg2 Qg2 0–1. Fournier,Frederic – sustotren, Active, 2009.

4.e3 Ne5?? 5.Nf3 (better 5.Be5 a5 6.b5+–) 5...Nc6 (5...Nf3!? 6.gf3 Nf6=) 6.Be2+= Nf6 (6...e6 7.0–0+=) 7.0–0 (7.b5 Nb8+=) 7...e6 8.d4 (8.b5 Ne7+=) 8...Be7 (8...a6 9.c4+=) 9.c4 d5 (9...0–0 10.Nc3+=) 10.Nc3 (10.c5 a6+=) 10...dc4 11.b5 (11.Bc4!? 0–0 12.d5 Nd5 13.Nd5 ed5 14.Qd5 Qd5 15.Bd5+–) 11...Na5= 12.Nd2 (12.Ne5 0–0=) 12...Nb3 (12...a6 13.Nc4 ab5 14.Na5 Ra5 15.Bb5 c6 16.Bd3=) 13.Nb3+= cb3 14.Qb3 a5 (14...0–0 15.a4+=) 15.Qc2 (better 15.ba6 Bc8 16.Bb5 Bd7 17.Bd3+–) 15...Ba6?? (better 15...Rc8=) 16.ba6 (better 16.Bf3+–) 16...Ra6 (16...0–0 17.Rac1+–) 17.a4 (better 17.Ba6 0–0 18.Bd3+–) 17...Ra8 18.Nb5 0–0 19.Qc7 Qc7 (19...Rc8 20.Qd8 Rfd8 21.Rfc1+–) 20.Nc7 Rab8 (20...Rac8 21.Rfc1+–) 21.Rac1 Rbc8 (21...Rfd8 22.Rc2+–) 22.Nb5 (22.Ba6 Rcd8+–) 22...Rcd8 (22...h5 23.Na7 Ra8 24.Nc6+–) 23.Bf3 Nd5 (23...g5 24.Rc7 Bb4 25.Rfc1+–) 24.Rc6 Nb4 (24...Rc8 25.Rfc1 Rb8 26.Kf1+–) 25.Rb6 Nc2 (25...Rb8 26.Rb8 Rb8 27.Rb1+–) 26.Rb7 Nb4 (26...Rde8 27.Rb1+–) 27.d5! Bd6 (27...ed5 28.Re7 Annihilates a defender: e7) 28.Nd6 (better 28.de6 f6+–) 28...ed5 (28...Rd6 29.Be5 Rd5 30.Bd5 Nd5+–) 29.Nf5 d4 (29...Rb8 30.Rb8 Rb8 31.Bg7+–) 30.Ne7 (30.Bd4!? Rb8 31.Ra7 f6+–) 30...Kh8 31.Bd4 Rfe8 (31...Nc2 32.Bc3 Rb8+–) 32.Bg7 (better 32.Nf5 Rd4 33.Nd4+–) 32...Kg7 33.Nf5 Kf6 34.Rf7 (better 34.Nh6 Re6 35.Nf7+–) 34...Kg6 (34...Kf7 35.Bh5 Kf6 36.Be8 Kf5+–) 35.Bh5! Kg5 (35...Kh5 36.h3) 36.Ng3 (36.Ng3 Kh6 37.Rf5+–; 36.g4 Re3 37.f4) 1–0. FeegLood (2750) – bigmonster3 (1755), Time forfeit, 2016.

4.e3 Nf6 5.Nf3 d5 6.c4+= dc4 (6...e6 7.cd5 ed5 8.Qc2+=) 7.Bc4 Qd6 (7...e6 8.Qc2 Qd6 9.e4+–) 8.Qc2 (8.Nc3+=) 8...0–0–0 (better 8...e6!?+=) 9.Bf7+– e6 10.Qc4 Rd7? (better 10...e5 11.Nc3 Kb8+–) 11.Be6+– Qd5 (11...Kb8 12.Bf6 gf6 13.Bd7 Qd7+–) 12.Bd5 Nd5 13.d4 g5 (13...Bd6 14.Nbd2 Nd8 15.e4+–) 14.e4 Nf6 15.d5 g4 16.dc6 gf3 17.cd7 (17.cd7 Nd7 18.Bh8+–) 1–0. Pierre – Kamotti, internet, 2020.

3.a3 d5

4.e3 e6 5.Be2 Bd6?? (5...Nf6 6.Nf3=) 6.Nf3 (better 6.Bg7 Be5 7.Be5+–) 6...f6 (6...Nf6 7.Be5=) 7.0–0 Nc6 8.Ne1 (8.Nc3 a6+=) 8...Qd7 9.Bh5 g6 10.Be2 0–0–0 11.c3 Kb8 12.a4 Nce7 13.a5 (13.b5 c5+=) 13...Nc8 (better 13...b5!?=) 14.ab6+– cb6 15.Na3 h5 16.Nb5 Rh7 17.Qa4 (17.Nf3 e5+–) 17...Ba8 (better 17...a6 18.Nd6 Qa4 19.Ra4 Nd6+–) 18.Na7?? (better 18.Nf3+–) 18...Na7 (better 18...Qa4 19.Ra4 Ra7 (19...Na7?! 20.Nf3–/+) 20.Ra7 Na7–+) 19.Bb5?? (19.Qa6 Qc7 20.f4 g5–/+) 19...Qb7 (better 19...Qb5 20.Nf3 Qa4 21.Ra4 Bc6–+) 20.Ba6 Qc7 21.Nd3? (better 21.f4!?–/+) 21...Bh2–+ 22.Kh1 Bd6 23.Ba3 (23.f3 h4 24.Nf2 Bc6–+) 23...Ne7 (better 23...h4!? 24.Nc5 Qf7 25.Rfb1–+) 24.Nc5 bc5 25.bc5 Bc5 26.Qb3?? (better 26.Rfb1 Bb6 27.Qd4–/+) 26...Bb6 27.Rfb1 Nec8 28.d4 h4 (better 28...Bb7 29.Bd3–+) 29.Bc5 g5 (29...Rd6 30.Bc8 Nc8–+ (30...Kc8?! 31.Bb6 Rb6 32.Qb6 Qb6 33.Rb6–/+)) 30.Bb6 Nb6 (30...Qb6?! 31.Qc2 Rh6 32.Rb6 Nb6 33.Kh2=+) 31.Qb6 Qb6 32.Rb6 Kc7 33.Rab1? (33.Re6 Rf7–+) 33...Rhh8 (better 33...Rd6 34.Rd6 Kd6–+) 34.Re6 g4 Black prepares h3 (34...Rhf8 35.c4–+) 35.Re7 (better 35.Bd3–/+) 35...Kd6?? (better 35...Rd7 36.Re6 Rf8–+) 36.Ra7+– g3? (better 36...Rb8 37.Rb8 Rb8+–) 37.f3?? (better 37.Rb6 Bc6 38.Bb5+–) 37...h3?? (37...Rb8 38.Rb4 Bc6=) 38.Rb2 (38.Rb6 Bc6 39.Bb5 Rc8+–) 38...h2?? (better 38...hg2 39.Kg2 Rh2 40.Kg3 Rb2–+) 39.Bb7 (better 39.Rb6!? Bc6 40.Bb5 Rc8+–) 39...Rb8?? (better 39...Bb7 40.Rab7 Ke6+–) 40.Rb6+– Kc7 41.Rc6 Kd8 42.Rd6?? (42.Ra8 Kd7 43.Rb8 Rb8 44.Rf6 Rb7 45.Rf7 Kc6 46.Rb7 Kb7 47.e4=) 42...Ke7 (42...Kc7 43.Rc6 Kd8 44.Ra8 Kd7 45.Rb8 Rb8 46.Rf6 Rb7 47.Rf7 Kc6 48.Rb7 Kb7=) 43.Rb6+– Bb7 44.Rab7 Rb7 45.Rb7 Kd6 (45...Kf8 46.Rb8 Kg7 47.Rb7 Kg6–/+) 46.Rb6?? (better 46.Rg7+–) 46...Kc7–/+ 47.Rf6?? (better 47.Rb1 f5 48.Rd1–+) 47...Ra8 48.Rf7 Kd6 49.Rf6 Ke7 50.Rb6 (50.Ra6 Ra6 51.c4 Ra1) 50…Ra1 (50...Ra1 51.Rb1 Rb1) 0–1. Akrapovik – Tekstopisac, lichess.org, 2019.

4.e3 Nf6 5.Bf6 ef6 6.d4 g6 7.Nc3 Bg7 8.Bb5 c6 9.Ba4 b5 10.Bb3 a5 11.Nge2 Nd7 12.0–0 a4 13.Ba2 0–0 14.Bb1 f5 15.Nf4 Nf6 16.Ba2 Re8 17.Nce2 Ne4 18.f3 Nd6 19.Nc3? (better 19.Qd3=+) 19...Re3–+ 20.Qd2 Qe7 21.Rae1? (21.Rad1 Re8–+) 21...Re8 (21...Bd4 22.Kh1 Re8 23.Nd3–+) 22.Re3 (22.Nfe2 f4! 23.Rf2 Nf5–+) 22...Qe3 23.Qe3 Re3 24.Nd1 (24.Nb1 Bd4 25.Kh1–+) 24...Ra3 (worse 24...Bd4 25.Ne3 Be3 26.Kh1 Bf4 27.Re1–+) 25.Bb1 Bd4 26.Nf2 Nc4 27.N4d3 (27.Ne2 Bb6–+) 27...Nd2 (27...Ra1 28.Rc1–+) 28.Re1 (28.Rd1 Ra1 29.c3 Bc3–+) 28...Nb1 (better 28...Ra1 29.f4–+) 29.Rb1 Rc3 30.Rc1 a3 31.g4 (31.Nc5 Be3 32.Re1 Bc5 33.bc5 b4–+) 31...a2 32.Ra1 (32.Kg2 fg4 33.fg4 Rc2 34.Rc2 a1Q–+) 32...Rc2 33.Ra2 Ra2 34.Kg2 fg4 35.fg4 Bc8 (35...c5 36.bc5 b4 37.Nb4 Rf2 38.Kg3–+) 36.h3 (36.Kf3 Rd2–+) 36...f5 37.g5 (37.Kf1 fg4 38.hg4 c5 39.bc5 Bf2 40.Nf2 b4–+) 37...f4! 38.h4 (38.Nf4 Be3 Double attack (38...Rf2 Deflection; 38...Be3 Decoy)) 38...Bf5 39.Kf3 Be3 40.Nf4 Bf2 41.h5 d4 42.hg6 Be1 43.gh7 Kh8 44.g6 d3 (44...Rf2 45.Kg3–+) 45.Ng2 Rg2! 46.Kg2 (46.Ke3 d2 47.g7 Rg7 48.Kf3 d1Q 49.Kf4 Qd5 50.Ke3 Qe4) 46...d2 47.g7 (47.Kf1 d1Q 48.g7 Kh7 49.g8B Kg8 50.Kg1 Qg4 51.Kf1 Bd3 52.Ke1 Qe2) 47...Kg7 (47...Kh7 48.Kh2 d1Q 49.g8Q Kg8 50.Kg1 Qg4 51.Kf1 Bd3 52.Ke1 Qe2) 48.h8Q (48.Kg1 d1Q 49.h8Q Kh8 50.Kg2 Be4 51.Kh2 Qe2 52.Kh3 Bf5) 48...Kh8 49.Kf1 (49.Kg1 Be4 50.Kh2 d1Q 51.Kh3 Qh5) 49...Bd3 (49...d1Q 50.Kg1 Qg4 51.Kf1 Bd3 52.Ke1 Qe2) 50.Kg2 d1Q 51.Kg1 (51.Kh2 Qe2 52.Kg1 Qf2 53.Kh1 Be4) 51...Qg4 52.Kh2 Qg3 53.Kh1 Be4 0–1. themuttsknutts (1705) – claymil (1975), ChessWorld.net, 2013. (=1.a3 d5 2.b4 b6 3.Bb2 Bb7)

4.Nf3 Nd7 5.e3 Ngf6 6.c4 e6 7.cd5 ed5 8.Nc3 Be7 9.Bd3 0–0 10.0–0 h6 11.Qc2 Rc8 12.Nb5 c5 13.Na7 Rc7 14.Nb5 Rc8 15.Bc3 Ba6 (15...Ne4 16.Qb2) 16.Na7 Bd3 17.Qd3 Rc7 18.Nb5 Rc8 19.Nh4 c4 20.Qd4 Qe8 21.Nf5 Nb8 22.Nbd6 Bd6 23.Nd6 Qe7 24.Nc8 Rc8 25.Qb6 Ne4 26.a4 Nc3 27.dc3 Nd7 28.Qb7 Re8 29.Qd5 Nf6 30.Qc4 1–0. Wall,Bill – YNCW, FICS, 2012.

3.a3 d6

4.c4 e5 5.Nf3 Nf6 6.Nc3 Nbd7 7.e3 Be7 8.Be2 0–0 (8...a5 9.0–0=) 9.0–0 Re8 (9...c5 10.d4=) 10.h3 (10.d4 c5=) 10...Rc8 (10...e4 11.Nd4=) 11.d4 ed4 (11...a6 12.Qa4=) 12.Nd4+= d5 (12...Ne5 13.f4 Ng6 14.Nf5+=) 13.cd5 Nd5 14.Nd5 Bd5 15.Bc4 (15.Nf5 Bf6 16.Qd5 Bb2+–) 15...Nf6 (15...Ne5 16.Ba6 Rb8 17.Qc2+=) 16.Bd5 (16.Ba6!?+–) 16...Qd5= 17.Rc1 (17.b5 a6 18.a4 Qe5+=) 17...c5 18.bc5 Bc5 (18...bc5 19.Nb5 Qb7 20.Bf6 Qb5 21.Be7 Re7 22.Qg4=) 19.Nf3 (19.Qa4 Qe4=) 19...Qd1 (19...Qe6 20.Qa4=) 20.Rfd1 Ne4 21.Nd2 Nd2 22.Rd2 Rcd8 23.Rd8 (23.Rcd1 Rd2 24.Rd2 f6=) 23...Rd8 24.Rc2 (24.Kf1 Kf8=) 24...Rd1 25.Kh2 Bd6 26.g3 h6 (26...f6 27.Kg2=) 27.Rc8 Kh7 28.Ra8 (28.Kg2 Rb1 29.Bd4 a5=) 28...a5 (better 28...Rd2 29.Bd4 Rf2 (29...Ba3?! 30.Ra7 Bc5 31.Bc5 bc5 32.Rf7+=) 30.Kg1 Bg3 31.Ra7 b5–/+) 29.e4?? (better 29.Bd4 Rb1 30.Ra7=) 29...Rd2–+ 30.Bc1? (30.Bc3 Rf2 31.Kh1–+) 30...Rf2 31.Kg1 Bc5 (31...Bg3?! 32.Ra7–+) 32.Kh1 (32.Rc8 Ra2 33.Rc5 bc5–+) 32…Rf1 (32...Rf1 33.Kg2 Rc1–+) 0–1. keene2019 (1700) – aldo12 (1795), gameknot.com, 2020. (=1.a3 b6 2.b4 Bb7 3.Bb2 d6)

4.e3 Nd7 5.Nf3 e5 6.d4 ed4 (6...e4 7.Nfd2=) 7.Nd4 (7.Bd4 Ngf6+=) 7...Ngf6= 8.Nf5 (8.Nf3 a5=) 8...g6 9.Ng3 (9.Nh4 Bg7=) 9...Bg7 10.h4 (10.Nd2 0–0=) 10...0–0 11.h5? (11.Nc3 h5=+) 11...Re8 (11...Nh5 12.Nh5 Bb2–+ (12...gh5? 13.Qh5 Be4 14.Bd3 Bd3 15.cd3+–)) 12.h6 (12.hg6!? fg6 13.Bc4 d5 14.Bb3=) 12...Bh8–/+ 13.Nd2 (13.Nc3 a5 14.b5 Nc5–/+) 13...Qe7 (13...Ne4 14.Nge4 Bb2 15.Rb1–/+) 14.Nf3 Ne5 (better 14...Ne4 15.Bh8 Ng3–/+) 15.Ng5 (15.Ne5 de5 16.Qe2 c5–/+) 15...d5 (15...Nd5 16.N5e4 f5 17.c4 Ne3 18.fe3 fe4 19.Qd2–+) 16.Bb5 (16.Ra2!?–/+) 16...c6–+ 17.Be2 Rad8 (17...Nfd7 18.Nh3 Nf3 19.Bf3 Bb2 20.Rb1–/+) 18.Qd4 (better 18.Qc1–/+) 18...c5 (18...Ne4 19.N5e4 Nf3 20.gf3 Bd4 21.ed4 de4 22.fe4–+) 19.Qf4? (better 19.Qe5!? Qe5 20.Be5 Re5 21.Nf3=+) 19...d4–/+ 20.0–0–0 (20.bc5 de3 21.Qe3–+) 20...cb4 21.ed4 (21.ab4 Nd5 (21...Bg2?! 22.Rhg1 Nd5 23.Qh4–+) 22.Qh4 de3–+) 21...ba3 22.Ba1 Qb4 (22...a2 23.c3 Qa3 24.Kd2 Bg2 25.Rhg1–+) 23.Qd2 (23.N3e4 Be4 24.Ne4 Ne4 25.Qe4 Nc4–+) 23...Qa4 24.Qc3 (24.f3 a2 25.c3 Nc4 26.Bc4 Qc4–+) 24...Nd5 (better 24...Rc8 25.Qd2 Nc4 26.Bc4 Rc4–+) 25.Qb3 Qb3 26.cb3 Rc8 27.Kb1 Nc6 28.Bc4 (28.Bb5 a6 29.Bc6 Bc6–+) 28...Ncb4 29.N3e4 (29.Rd2 Bc6 30.N5e4 Red8–+) 29...a2 (better 29...b5!? 30.Bd5 Bd5–+ (30...Nd5?! 31.Nd6–/+)) 30.Kb2 b5! 31.Bb5 Rc2 32.Ka3 Rec8 (32...Bc6 33.Ba4–/+) 33.Nd6=+ Rd8?? (better 33...Rf2 34.Nc8 Bc8=+) 34.Nb7+– Bf6?? (34...Rb8 35.Nd6 Rf2+–) 35.Nd8 Bd8 (35...Bg5 36.Rde1 Nc7 37.Kb4 Rf2 38.Nc6 Bd2 39.Ka4 Be1 40.Re1+–) 36.Rhe1 Be7 (36...Nc7 37.Kb4 Bg5 38.Re2 Re2 39.Be2 Bh6 40.Bc4+–) 37.Re7! Ne7 (37...Ne7 38.Kb4 Deflection (38.Kb4 Remove defender; 38.Kb4 Overloading)) 38.Kb4 f6 (38...Nf5 39.Re1 Rc8 40.Bc4 a5 41.Ka5+–) 39.Bc4 Kf8 (39...Rc4 40.bc4 fg5 41.d5+–) 40.Ne6 (better 40.Nh7 Ke8 41.Nf6 Kf8+–) 40...Ke8 41.Nc5 (41.d5 Rf2 42.Bb5 Kf7+–) 41...Kd8 (41...Rf2 42.d5 a6 43.Ba6+–) 42.Nd3 (42.d5 a6 43.Ba6 Rf2+–) 42...a5 (42...Kd7 43.d5 Nf5 44.Bf6+–) 43.Ka3 (43.Ka5 Nf5 44.d5 Nd6+–) 43...Nc6 (43...f5 44.d5 Nc8 45.Bf6 Kd7 46.Bd4+–) 44.Nc5 (44.Bg8 Ne7 45.Bh7 Rc7+–) 44...Nb4 (44...Rf2 45.d5 Nb4 46.d6 Nc2 47.Ka4+–) 45.Ka4 (45.Nb7 Kd7 46.Na5 Rf2 47.Bb5 Kc8 48.Kb4 Rg2+–) 45...Rf2 46.Ka5 (better 46.d5 Rf5+–) 46...Rf5 (46...Nc2+–) 47.Kb4 Rg5 48.Rd2 Rg2 49.Rg2 f5 (49...Kc7 50.Ne6 Kc6 51.d5 Kd6 52.Ra2 Kd7 53.Bb5 Kd6 54.Ra6 Kd5 55.Bd3 f5 56.Nf4) 50.Ra2 f4 (50...g5 51.d5 Ke7 52.Ra7 Ke8 53.d6 Kd8 54.Ra8) 51.Ra7 (51.d5 Ke7 52.Ra7 Ke8 53.d6 g5 54.Ra8) 51...g5 (51...Kc8 52.Be6 Kb8 53.Rh7 Ka8 54.Na6 g5 55.Bd5) 52.d5 (52.Ba6 Ke8 53.Ne6 g4 54.Bb5) 52...Kc8 53.Bf6 (53.Bf6 Kb8 54.Rb7 Ka8 55.d6 g4 56.d7 g3 57.d8Q; 53.Ra8 Kc7 54.Be5 Kb6 55.Ra6) 1–0. FeegLood (2570) – destroyerr (2395), lichess.org, 2015.

4.e3 Nd7 5.Nf3 e5 6.d4 e4 (6...a5 7.b5=) 7.Nfd2 Ngf6 8.c4 g6 (8...c6 9.Nc3 d5 10.Be2=) 9.Nc3 (9.d5 Rg8+–) 9...Bg7+= 10.Qc2 e4 becomes the focus of attention (10.Be2 0–0+=) 10...0–0 (10...Qe7 11.Be2+=) 11.Nce4 Ne4 12.Ne4 Re8 13.Nd2 (13.Ng3 a5+–) 13...c5 (13...a5 14.b5+=) 14.d5+– Ne5 15.Be2 Rc8 (15...cb4 16.ab4 a5 17.0–0+–) 16.0–0 (16.e4 b5+–) 16...b5 (16...cb4 17.ab4 Bd5 18.Qb3+=) 17.cb5 (17.bc5!? Rc5 18.f4 Nc4 19.Nc4 (19.Bc4?! bc4 20.Bg7 Kg7=) 19...bc4 20.Bg7 Kg7 21.Qb2 c3 22.Qb7 Re3 23.Bf3+–) 17...Bd5+– 18.Qa4 (18.e4 cb4 19.Qd1 ba3 20.Ra3 Nc4 21.Bg7 Kg7+=) 18...Qg5+= 19.g3 Qh6 (19...Qe7 20.Rad1+=) 20.Qa7 (20.bc5 dc5 21.Qa7 Nc6 22.bc6 Bb2+–) 20...Qh3 (better 20...cb4!? 21.Qa4 ba3 22.Ra3 Qh3+–) 21.e4+– Be6 22.bc5 Rc5 23.b6?? (23.Rfb1 Qh6 24.f4 Rc2+–) 23...Bg4?? (better 23...Nc6!? 24.Qa4 Bb2–/+) 24.f3 (better 24.Qa6+–) 24...Rc2?? (24...Nc6 25.Qa4 Bb2 26.fg4 Ba1 27.Ra1=) 25.b7?? (25.Qa4 Rec8 26.Be5 (worse 26.fg4 Rd2 27.Qa6 Rcc2–/+) 26...Be5 27.b7 Bg3 28.bc8R Bc8 29.Rf2 (29.hg3 Qg3 30.Kh1 Qh4 31.Kg1 Bh3–+) 29...Bf2 30.Kf2 Qh4 31.Ke3 Qg5 32.f4 Qc5 33.Qd4 Rc3 34.Bd3=) 25...Rb2? (25...Bf3 26.Rf2 Rb2 27.Bf3 Rd2= (27...Nf3? 28.Nf3 Rf2 29.Kf2 Ba1 30.b8Q Rb8 31.Qb8 Kg7 32.Qd6+–)) 26.Rab1?? (better 26.fg4 Nc6 27.b8Q Reb8 28.Qf7 Kh8 29.Rab1 Rb1 30.Rb1+–) 26...Rd2–+ 27.b8Q Re2 (27...Rb8?! 28.Rb8 Bf8 29.Qe3–/+) 28.Qe8 Bf8 29.Qef7 Nf7 30.Rf2 Ne5 (better 30...Bf3!? 31.Re2 Be2 32.Qe3–+) 31.Re2 Nf3 32.Kf2 (32.Kh1 Nh2 33.Rh2 Bf3 34.Kg1 Qg3 35.Kf1 Qh2 36.Qe3 Qh1 37.Kf2 Qb1 38.Qf3–+) 32...Qh2 33.Ke3 Qh6 (33...Qh6 34.Kf2 Ne5–+) 0–1. FeegLood (2580) – destroyerr (2380), lichess.org, 2015.

4.e3 Nd7 5.Bg7?? e6?? (better 5...Bg7 6.d4 e5–+) 6.Bh8+– d5 (6...Ne7 7.Bb2+–) 7.Qh5 (7.Nf3 Ngf6+–) 7...e5 (7...Ngf6 8.Qh4+–) 8.Qh7 (better 8.Be5 Ngf6 9.Bf6 Nf6 10.Qe5 Qe7 11.Qe7 Be7 12.Nf3+–) 8...Qe7 (8...Ngf6 9.Qf5 Bd6+–) 9.Qg8 0–0–0 10.Qg4 (10.Qh7 f6 11.Qh3 Kb8+–) 10...Kb8 (10...Bh6 11.Be5! Qe5 12.d4+–) 11.Nf3 (better 11.Qh5 f6+–) 11...Nf6 (11...Bh6 12.Bg7 f5 13.Qh4 Qh4 14.Nh4 Bg7 15.Nf5+–) 12.Bf6 (better 12.Qg5!? Nd7 13.Qe7 Be7 14.Be5 Ne5 15.Ne5 Bf6+–) 12...Qf6 13.Qh4 (better 13.Qg5 Bg7 14.Qf6 Bf6+–) 13...Qe7 (13...Qh4 14.Nh4 e4 15.Nf5+–) 14.Qe7 Be7 15.Ne5 Rd7 16.d4 (better 16.Nd7 Kc8 17.Ne5 Bf6+–) 16...Rd8 17.Nd2 (17.Nf7 Rc8+–) 17...Bd6 18.Nd3 (better 18.Nf7 Rd7 19.Nd6 Rd6+–) 18...f6 19.Nf3 (19.h4 Rh8+–) 19...Be7 20.Be2 Rd6 21.0–0 (21.h4!? Rd7+–) 21...Rd7 22.Nf4 (22.g3 Bd6+–) 22...Rd8 23.h4 Rg8 24.h5 (better 24.c4 dc4 25.Bc4 Rg4+–) 24...f5 25.Bd3 Bg5 26.Bf5 (26.Ng5 Rg5 27.h6 Rg8 28.Bf5 Rh8+–) 26...Bh6 27.Bg6 Bc8 28.Rae1 (better 28.Nd5 Bg7+–) 28...Bf5 29.Nd5 (better 29.Bf5 Bf4 30.ef4 Rf8+–) 29...Bg6 30.Nf6 (30.hg6 Rg6 31.b5 Rd6+–) 30...Rg7 31.Nd7! Rd7 32.hg6 Rg7 33.Ne5 Rg6 34.f4 (better 34.Ng6 Kc8+–) 34...Re6 35.Rf3 (35.f5 Rd6+–) 35...Re8 36.Kf2 (36.f5 c5+–) 36...Rg8 37.Rg3 (better 37.f5+–) 37...Bf4 38.Nf3 (38.Rg8 Kb7 39.ef4+–) 38...Rg3?? (better 38...Bg3 39.Kf1 Be1 40.Ne1 b5+–) 39.Ke2 (better 39.ef4 Rg8+–) 39...Rg8 (39...Rg2 40.Kf1 Rg3 41.Kf2+– (41.ef4?! Rf3 42.Ke2 Rf4+–)) 40.Kd3 (better 40.ef4 Rg2 41.Kd3 Rg4+–) 40...Bg3 41.Rf1 (better 41.Re2+–) 41...Be1 (41...Bd6 42.Rf2+–) 42.Ne5 (better 42.Ne1 a6 43.c4+–) 42...Re8 (42...Bh4 43.Rf4 Bg3+–) 43.Rf8! (43.Rf8 Rf8 44.Nd7 Kc8 45.Nf8+–) 1–0. FeegLood (2865) – navdanya (1760), lichess.org, 2015.

4.e3 Nf6 5.d4 g6 (5...a5 6.b5=) 6.c4 Bg7 7.Bd3?? (7.Nf3 0–0+=) 7...0–0 (better is 7...Bg2 8.Nf3 Bh1–+) 8.Nf3+= e5 9.de5 de5 10.Ne5 Qe7 11.Nf3+= Nbd7 12.Nc3 Ne5 13.Ne5 Qe5 14.0–0 Qg5 15.Re1?? Bg2 16.Be4?? Be4 (16...Be4 17.Kf1 Qg2 18.Ke2 Bf3 19.Kd2 Bd1 20.Rad1 Rfd8 21.Kc1 Qf2–+; 16...Bf3 17.Kf1 Qg2) 0–1. Fournier,Frederic (1900) – nicoguaro (1620), Active Blind, 2007.

4.f3 Nd7 5.e4 Ngf6 6.Bc4 g6 (6...e6 7.Nh3=) 7.Ne2 Bg7 8.d4 e6 (8...d5 9.ed5 Nd5 10.Qd3=) 9.0–0 (9.Bd3 0–0+=) 9...c5 (9...d5 10.ed5 Nd5 11.Qd3=) 10.bc5 dc5 11.dc5 Nc5 12.Nbc3 (12.Bb5 Kf8+=) 12...0–0 13.Qd8 Rad8 14.Rfd1 (14.Rad1 a6=) 14...Nfd7 15.Nd4? (15.Nf4 Ne5 16.Be2 a6+=) 15...Bd4 (better is 15...Ne5 16.Bb5 Rd4 17.Rd4 Nf3 18.gf3 Bd4 19.Kf1 f5–+) 16.Rd4= Ne5 17.Rad1 Nc6 18.Rd8+= Rd8 19.Rd8 Nd8 20.Bb5 Nc6 21.Bc6 Bc6 22.Kf2 Kg7 23.Ke3 Kf8 24.Kd2 Ke7 25.Ne2 Kd6 26.Nd4 e5 27.Nc6+/– Kc6 28.Be5 Kb5 29.Bd6 Ka4 30.Bc5 bc5 31.Kc3 Ka3 32.Kc4 Kb2 33.Kc5 Kc2 34.g4? Kd3–/+ 35.f4?? Ke4–+ 36.f5 gf5 37.gf5 Kf5 38.Kb5 Ke4 39.Ka6 f5 40.Ka7 f4 41.Kb6 f3 (41...f3 42.h4 h5 43.Kc5 f2 44.Kd6 f1Q 45.Kc6 Qf6 46.Kc5 Qe7 47.Kb6 Kd5 48.Kb5 Qb7 49.Ka5 Kc4 50.Ka4 Qb4) 0–1. Fournier,Frederic (1915) – VEgeTAorGUllOSo (2230), Active (1/0), 2003.

4.f4 Nd7 5.Nf3 Ngf6 6.e3 g6 (6...e6 7.Nc3=) 7.Bc4 (7.g4 Bg7=) 7...Bg7 8.0–0 0–0 9.h3 (9.Nc3 c6=) 9...c5 10.g4 cb4 11.ab4 Qc7 12.Be2 e5 (12...a5 13.g5 Ne4 14.Bg7 Kg7 15.ba5=+) 13.f5 (13.Nc3!?=) 13...gf5=+ 14.gf5 Nd5 (14...a5 15.ba5 ba5 16.Nc3=+) 15.d3 0–1. Swartz,David (1940) – Kaulule Siame,Kela (2145), PSS, 2016. (=1.a3 b6 2.b4 Bb7 3.Bb2 d6)

3.a3 e6

4.a4 Qe7 5.b5 Nf6 6.a5 g6 (better 6...ba5!? 7.Ra5 Ne4=+) 7.a6+= Bc8 8.Nf3 Bg7 9.e3 0–0 10.Be2 c5 11.0–0 d5 12.Re1 Bd7 13.d4 c4 14.Na3 (14.Ba3!? Qd8 15.Bf8 Bf8 16.Na3+–) 14...Ne4= 15.c3 (15.Rb1 Rc8 16.Ne5 Qg5=) 15...h5 (15...Qe8!?=+) 16.Qa4 g5 17.Red1 f6 (17...Qf6!? 18.Rf1 g4=) 18.Nd2+– Nd6 (18...Nd2 19.Rd2 g4 20.e4+–) 19.Rab1 (19.Ndc4!? dc4 20.Bf3 Nc6 21.bc6 g4 22.Bg4 b5+–) 19...f5 Black intends g4 (19...g4 20.Bc1+=) 20.Bc1 (20.Bh5 Rf6 21.Be2 Qe8+–) 20...g4 21.Qc2 (21.Nac4 Nb5 22.Rb5 dc4 23.Bc4 Bb5 24.Qb5 Kh8+–) 21...Qg5 (21...e5 22.de5 Qe5 23.Nf1=) 22.Nf1 (22.e4 Qh4 23.e5+–) 22...Qg6 23.Ng3 Ne4 (23...h4 24.Nf1=) 24.Ne4 de4?? (better 24...fe4 25.Bc4 dc4 26.Nc4 Rd8+=) 25.Bc4 (25.Nc4 h4+–) 25...h4 26.d5 ed5?? (better 26...g3+–) 27.Bd5 Be6 28.Ba8 Nd7 (28...Na6 29.Bd5 Nc5 30.Be6 Qe6 31.Ra1+–) 29.Bd5 Bd5 30.Rd5 Nf6 31.Rd6 g3 32.hg3 (32.fg3!? hg3 33.h3 Rc8+–) 32...hg3 33.f3 (better 33.Qa2 Kh7 34.Qd2+–) 33...Nh5?? (better 33...Qh5 34.Bb2 Qh2 35.Kf1 Qh1 36.Ke2 Qg2 37.Ke1 Qg1 38.Ke2 Qh2 39.Kf1 ef3 40.Qh2 gh2–/+) 34.f4 (better 34.Rg6 ef3 35.gf3 Rf7+–) 34...Nf4?? (34...Qd6 35.Qa2 Kh7=) 35.Rg6+– Ng6 36.c4 Nh4 (36...Rd8 37.Bb2 Bb2 38.Qb2+–) 37.c5 Nf3 38.gf3 ef3 39.Kf1 (39.Qc4 Kh8 40.cb6 f2 41.Kf1 ab6 42.Qh4 Kg8 43.Qg3 f4 44.ef4 Rf7+–) 39...f2 40.Kg2 (better 40.cb6 ab6 41.Qc4 Kh7 42.Qh4 Bh6 43.Qg3 Rf7+–) 40...f1Q 41.Kf1 g2 42.Kg2 Be5 43.Qc4 Kg7 44.Qh4 Kf7 45.Qe7! Ke7 46.c6 Ke6. alessandrocarvalhaes (1880) – fernestob (1925), lichess.org, 2019.

4.c4 d5 5.cd5= ed5 6.e3 c5 7.Nf3 cb4 (7...Nf6 8.Bb5 Nbd7 9.bc5 Bc5 10.Bf6 Qf6 11.d4=) 8.ab4+= Nf6 9.Nc3 Be7 10.Be2 0–0 11.0–0 (11.b5 Qd6+=) 11...Nc6 (11...Bb4 12.Qb3 a5 13.Rfc1+=) 12.Qc2 (better is 12.b5!? Nb4 13.Nd4+=) 12...d4 (12...Nb4 13.Qb3+=) 13.ed4 (13.Na2 de3 14.de3 A) 14...Bb4 15.Ng5 g6 16.Rfd1+/– (worse is 16.Nb4 Nb4 17.Qc3 Nbd5+/–); B) 14...Nb4 15.Nb4 Bb4+=) 13...Nd4 (13...Nb4!? 14.Qf5 a5+=) 14.Nd4= Qd4 15.Bf3 (better is 15.b5=) 15...Bf3–/+ 16.gf3 Qh4 (16...Rfc8–/+) 17.Ne2? (17.Ne4!?–/+) 17...Qg5 (17...Bb4 18.Rfd1–+) 18.Ng3 (better is 18.Kh1 Bb4 19.Rg1–+) 18...Bd6 19.Kg2? Bg3 20.fg3 Nh5 21.Qc3 f6 22.f4 Qd5 23.Qf3+/– Qf3 24.Kf3 Rad8 25.Rad1 g6 26.Bc3 f5 27.Rfe1 Ng7 28.Bg7 Kg7+= 29.d4 Rf7 30.d5 Rfd7 31.d6 Rd6–/+ 32.Re7 Kg8 33.Rd6+= Rd6 34.Ra7 Rd3 35.Kf2 Rb3 36.Ra8 Kg7 0–1. Fournier,Frederic (2020) – robertix (1820), Active (1/0), 2004.

4.c4 d5 5.cd5 Bd5 6.Nc3 Bb7 7.d4 g6 (7...Nf6!?=) 8.e4 Bg7 9.Nf3 Nc6 10.Bb5 Nge7? (better is 10...a6 11.Bc6 Bc6+=) 11.d5+– ed5 12.ed5 Nd5 (12...0–0 13.dc6 (worse is 13.Bc6 Nc6 14.dc6 Re8 15.Kf1 Bc6+/–) 13...Nc6 14.0–0+–) 13.Nd5 Bb2 (13...0–0 14.Bg7 Kg7 15.0–0+–) 14.Qe2 Be5 (14...Kf8 15.Qb2 Rg8+–) 15.Qe5 (15.Qe5 Kd7 16.Bc6 Bc6 17.Rd1+–) 1–0. Wall,Bill – Seeker, internet, 2004.

4.c4 f5 5.e3 Nf6 6.Nf3 d6 7.Ng5 Qe7 8.Be2 (8.d4 Nbd7=) 8...e5 (better is 8...Bg2!? 9.Rg1 Bb7+=) 9.0–0+= g6 10.d4 Nbd7 11.Nc3 Bg7 12.c5 (12.Nb5!? Nf8 13.Qa4+/–) 12...h6 13.Nf3 0–0 14.Qc2 dc5 15.bc5 Bf3 16.Bf3 e4 17.Be2 bc5 18.dc5 Qc5 19.Rfd1 Rab8 20.Rac1 Rfe8 (20...c6 21.Na4 Qc2 22.Rc2+=) 21.Na4 Qc2 22.Rc2 c5 23.Bf6 (23.Nc5? Rb2 24.Rb2 Nc5–+) 23…Nf6 ½–½. Moraes,Maurino – Lupato,Volmir, Indaial JASC op, 2004.

4.c4 Nf6 5.d3+=.

4.d3 Be7 5.Bg7 Bf6 6.Bf6 (better 6.Bh8 Bh8 7.d4+–) 6...Qf6+= 7.Nd2 d6 (7...a5 8.ba5 Ra5 9.e4+=) 8.Ngf3 Nd7 9.g3 (9.e4 Ne5+–) 9...Ne7 10.Rg1 Nd5 (10...Bf3 11.Nf3 Qc3 12.Nd2+=) 11.Ne4 Qg6 Black fights for the Initiative (11...Qg7 12.d4+–) 12.Nh4 (12.c4!? Ne7 13.Ned2+–) 12...Qg7+= 13.Rb1 (13.Bg2 f5 14.Nd2 Nc3+=) 13...f5 14.c4 fe4 15.cd5 Bd5 16.e3 (16.de4!? Be4 17.Rc1=) 16...Qc3=+ 17.Qd2 Qa3 18.d4 (18.de4!? Be4 19.Rc1=+) 18...a5–/+ 19.b5 Qa4 20.Qb2 (20.Rc1 Qb4 21.Bg2 Qb5 22.Rc7 0–0–+) 20...Qb4 21.Qb4 ab4 22.Be2 Ke7 23.Rb4? (better 23.f3–/+) 23...Ra1–+ 24.Bd1 Rha8 25.Ng2 (25.Rf1 R8a3–+) 25...R8a2 26.Nf4 Rd1! 27.Kd1 Decoy to d1 27...Ra1 A double attack 28.Kd2 Rg1 29.h4 (29.Nd5 ed5 30.Ke2 Rh1–+) 29...Nf6 30.Nh3 Ra1 31.Kc3 (31.Rb2 e5 32.de5 de5–+) 31...Ra2 (31...e5!? 32.de5 de5 33.Rb2–+) 32.Rb1 Ng4 33.Rf1 Ra3 34.Kb4 Ra8 35.Rc1 Kd7 36.Kc3 (36.Rc2 Ra1–+) 36...Ra3 37.Kb4 Ra2 38.Nf4 (38.h5 Rb2 39.Kc3 Rb5–+) 38...Nf2 (38...Rf2 39.Re1–+) 39.Nd5 (39.Rf1 c5 40.bc6 Kc6 41.Rc1 Kd7–+) 39...Nd3 40.Kc3 Nc1 41.Nf6 Ke7 42.Nh7 Rg2 43.Ng5 d5 44.Nh3 (44.Kb4 Nd3 45.Kc3 Rg3–+) 44…Rg3 (44...Rg3 45.Ng5 Nd3–+) 0–1. petrobbo (1985) – twister (1975), ChessWorld.net, 2011.

4.d3 Nf6 5.Nd2 a5 6.ba5 ba5 (6...Ra5 7.e4=+) 7.Rb1= Be7?? (better 7...Nc6=) 8.Bf6+– Bf6 (8...gf6 9.Rb7 Ba3 10.d4+–) 9.Rb7 Nc6 10.Ngf3 (10.e3 Rb8 11.Rb8 Qb8+–) 10...Nd4 (10...Rb8 11.Rb8 Qb8 12.e3+–) 11.Nd4 Bd4 12.e3 Bc3 13.Rb4 (better 13.Rb3 Bf6 14.d4+–) 13...Bb4 (better 13...ab4 14.a4 Ra4–+) 14.ab4+– ab4 15.Qg4 0–0 16.Qb4 c6 (16...Ra1 17.Ke2+=) 17.Be2 (17.Qc3 Qb6+–) 17...Qa5 (17...Ra2 18.Qc3+–) 18.Qa5+– Ra5 19.Nb3 Ra2 (19...Ra3 20.Kd2+–) 20.Kd2 Rb8 21.Kc3 (21.Ra1 Ra1 22.Na1 Rb1+–) 21...g6 (21...c5 22.Bf3+– (22.Nc5?! d6=)) 22.d4+– d6 23.e4 (23.Rb1 h5+–) 23...c5 (23...f6 24.f4+–) 24.dc5 dc5 25.Rd1 (25.Nc5 Rc8 26.Kb4 Rc2=+) 25...Ra3 26.Rd7 Rc8 (26...Rb4 27.Bd3+–) 27.Bc4 (better 27.Bb5+–) 27...Kg7 (27...Ra2+–) 28.Be6 Kf6 (28...Rf8 29.Bd5+–) 29.Bf7 Rc6 (29...Ke5 30.Kb2 Ra4 31.Rd5 Kf6 32.Rc5 Rc5 33.Nc5+–) 30.Bd5 Rc8 31.f4 Rb8 (31...g5 32.e5 Kf5 33.Rf7 Kg6 34.f5 Kh6 35.Rf6 Kg7+–) 32.Rf7 1–0. Guest0 – Guesto33, internet, 2019.

4.d3 Nf6 5.Nd2 Nd5 6.Ngf3 Nf4 7.g3 (7.e3 Nd5+=) 7...Ng6= 8.Bg2 Na6 (8...a5 9.b5+=) 9.0–0 (9.h4 f6+=) 9...Nb8 10.Nc4 d5 (10...a5 11.b5+=) 11.Ne3 Bd6 (11...a5!?+=) 12.Bg7+– Be5?? (better 12...Rg8 13.Bb2 c5+–) 13.Ne5+– Rg8 14.Ng6 Rg7 15.Nf4 c6 16.d4 Nd7 (16...a5 17.Qd2+–) 17.c4 Qf6 (17...Nf6+–) 18.Nh5 Qg6 19.Ng7 Qg7 20.b5 dc4 (20...cb5 21.cd5 ed5+–) 21.bc6 (21.bc6 Bc6 22.Bc6+–) 1–0. guestyacc – guesthquz, internet free game, 2018.

4.e3 Nc6 5.Nf3 Nf6 6.c4 Bd6 7.d3 (7.d4 0–0=) 7...0–0 8.Be2 Qe7 9.Nbd2 Rab8 (9...e5 10.b5 Nd8 11.0–0=) 10.0–0 a5 11.e4 ab4 12.ab4 (better is 12.e5 Ne5 13.Ne5 ba3 14.Bc3=) 12...Nd8?? (12...Bb4 13.d4+=) 13.Qb3?? (better is 13.e5 Bb4 14.ef6 gf6 15.Qc2+–) 13...e5 (13...Bb4!? 14.Bf6 gf6=) 14.Ra2 c5 15.b5+/– Bc7 16.Rfa1 d5? 17.cd5+– Bd6 18.Nc4 Nd7 19.Nd6 Qd6 20.Ra7 Qe7 21.Nd2 f5 22.f3 fe4 23.de4 Nf6?? 24.Nc4 Nf7 25.Qe3 Kh8 26.Bf1 Nh6?? 27.Qf2 Ra8 28.Ra8 Ra8 29.Ra8 Ba8 30.Qc2 Qd8 31.Qc3 Qc8 32.Qa3 Bb7 33.Bc3 Qa8 34.Qa8 Ba8 35.Nd2 Bb7 36.Bc4 Ne8? 37.Nf1 Nf7 38.g3 Kg8 39.Kg2 Nfd6 40.Nd2 Nc4? 41.Nc4 Bc8 42.f4 ef4 43.gf4 h5? 44.Kf3 Nc7 45.e5?? Bg4? 46.Ke3?? Kh7?? 47.d6 g6?? 48.dc7+– Bf5 49.Nd6 h4 50.Nf5 gf5 51.c8Q h3 52.Be1 Kh6 53.Bg3 c4 54.Qc4 Kh5 Plans e6 55.Qc7 (55.Qc7 Kh6 56.e6 Kg6 57.Bh4 Kh6 58.Bg5 Kh5 59.Qh7 Kg4 60.Qh4) 1–0. Fournier,Frederic (1865) – Chocolatito (1660), Active Blind, 2007.

4.e3 Be7?? 5.Bg7+– Bf6 6.Bh8 Bh8 7.Nc3 (7.d4 Nf6+–) 7...d6 8.d4 Nd7 9.Nf3 Ne7 10.Bd3 c6 (10...h6 11.0–0+–) 11.Bh7 Qc7 12.0–0 (12.Bd3 0–0–0+–) 12...0–0–0 13.Bd3 White prepares b5 13...Bf6 (13...Rg8 14.Re1+–) 14.Qe2 (14.a4 Rh8+–) 14...Rg8 (14...d5 15.e4+–) 15.Ba6 White prepares the advance b5 (15.Ne4 Bh8+–) 15...d5 16.Bb7 Kb7 17.b5 (17.Nd1 e5+–) 17...Nf5 (17...c5 18.Na2+–) 18.bc6 Qc6 19.Qb5 (better 19.Na2 Qc7+–) 19...Qc7?? (19...Qb5 20.Nb5 a6 21.Nc3+–) 20.Na4 (better 20.Nd5 Qc8+–) 20...Nh4 (20...Rh8 21.Rfc1+–) 21.Nh4 Bh4 22.g3 (22.Rfc1 a6 23.Qb3 Rc8+–) 22...Bg3 (22...a6 23.Qd3 Be7 24.Nb2+–) 23.fg3 (23.hg3?! Rg3 24.fg3 Qg3 25.Kh1 Qh3 26.Kg1 Qg3 27.Kh1 Qh3 28.Kg1 Qg3=) 23...f5 (23...Rg3 24.Kh1 Rh3 25.Qe2+–) 24.Nc5! Nc5 25.dc5 Qe5 (25...Rg3 26.Kh1 Re3+–) 26.Qd7 Ka6 (26...Kb8 27.Qd6 Qd6 28.cd6 Kc8+–) 27.cb6 (27.Qa4 Kb7 28.cb6 ab6+–) 27...Qe3?? (better 27...Rg3 28.hg3 Qg3 29.Kh1 Qh3 30.Kg1 Qg3 31.Kh1 Qh3 32.Kg1 Qg3=) 28.Rf2+– Rg3 (28...ab6 29.Kf1 Qe4+–) 29.hg3 (29.Kf1 ab6 30.Qc8 Ka7 31.Qc7 Ka6 32.Qg3 Qc5+–) 29...Qg3 30.Rg2 (better 30.Kf1 Qh3 31.Ke2 Qg4 32.Rf3 Qc4 33.Kd2 Qd4 34.Rd3 Qf4 35.Kc3 ab6 36.Qe6 Qc7 37.Kb2 Qg7 38.c3+–) 30...Qe3 31.Kh1 Qh3 32.Rh2 (32.Rh2 Qf3 33.Kg1 Qg3 34.Kf1 Qf3 35.Rf2 Qh1 36.Ke2 Qe4 37.Kd1 Qd4 38.Ke1 Qc3 39.Kf1 Qc4 40.Re2 Qf4 41.Ke1 Qh4 42.Kd1 Qd4 43.Rd2 Qg1 44.Ke2 Qg4 45.Kd3 Qc4 46.Ke3 Qe4 47.Kf2 Qf4 48.Kg1 Qg3 49.Kf1 Qf3 50.Ke1 Qg3 51.Kd1 Qg1 52.Ke2 Qg4 53.Ke1 Qg1 54.Ke2=) 1–0. alddhsfd (1670) – akapulko20 (1725), lichess.org, 2019.

4.e3 Ne7 5.Nf3 Ng6 6.h4 f6 (6...h5 7.Bd3+=) 7.h5+= Ne7 8.h6 gh6? (better 8...a5!?+=) 9.Bf6+– Rg8 10.Nc3 (10.Ne5!? Be4+–) 10...Rg6+– 11.Bh4 Qc8 (11...Bg7!?+–) 12.Ne5+– Rg8 (better 12...a5+–) 13.Qh5 Ng6 14.Bd3 Be7 (14...d6 15.Bg6 hg6 16.Ng6 Kd7 17.Ne5 de5 18.Qf7 Kd6 19.Qg8 c5+–) 15.Ng6 hg6 (15...Bh4 16.Ne5 Kd8 17.Qh4 Ke8 18.Qh5 Kd8+–) 16.Bg6 Kd8 (16...Rg6 17.Qg6 Kf8 18.Qh6 Kf7 19.Qh7 Kf8 20.Qe7 Kg8 21.Bf6 Bg2 22.Qg7) 17.Be7 Ke7 18.Qh4 Kf8 (18...Kd6 19.Nb5 Kc6 20.Qc4) 19.Qf6 1–0. FeegLood (2595) – IvoryRedLama (2055), lichess.org, 2015.

4.e3 f6 5.Nf3 g6 6.d4 Bg7 7.c4 Ne7 8.Bd3 0–0 9.Nbd2 d5 10.0–0 dc4 11.Nc4 Bd5 12.Ncd2 Nd7 (12...f5 13.Qc2+=) 13.Be2 (13.e4 Bb7 14.Bc4 Kh8+–) 13...Rc8? (13...f5 14.Qc2+=) 14.Rc1 (14.Ba6 Rb8 15.e4 Ba8+–) 14...c5 (14...f5 15.Ba6 Rb8 16.Qa4+=) 15.bc5 bc5 16.dc5 (16.e4!? Ba8 17.Bb5+/–) 16...Nc5+= 17.Bc4 Bc4 18.Nc4 (18.Rc4 Nd3 19.Bd4 Qd5+=) 18...Qd1 (better is 18...Nd3–/+) 19.Rfd1= Rfd8 20.Rd8 Rd8 21.Ncd2 Nd3 22.Rc2 f5 (better is 22...e5!?=) 23.Bg7+/– Kg7 24.Rc7 Kf6 25.Ra7 Ne5 26.Ne5 Rd2 27.Nd7 Kf7 28.Kf1 h5 29.Ke1 Ra2 30.a4 Ke8 31.Nc5 Kf7 32.a5 Kf6 33.a6 Ra5? 34.Nb3 Ra3 35.Nd4 Nc8 36.Ra8 Nb6+/– 37.Ra7 Nc8 38.Rc7 Nb6 39.a7 e5 1–0. Fournier,Frederic (1660) – Ferrorr, Partie amicale, 0m + 5s, 2008.

4.e3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7).

4.e3 h6 5.c4 a6 (5...a5 6.ba5 Ra5 7.Nf3=) 6.Nf3+= Nf6 7.d4 d6 (7...d5 8.Nc3+=) 8.Nc3 Nbd7 9.Bd3 g5 (better 9...Be7+=) 10.Qc2 (10.0–0 Bg7+=) 10...Bg7 (10...g4!? 11.Nd2 Bg2=+) 11.h3 d5 (11...Bf3 12.gf3 e5 13.d5+=) 12.c5 b5 (12...Bc6 13.Rc1+=) 13.Nd2 (13.a4 ba4 14.Qa4 Rb8+–) 13...g4 (13...e5 14.Ne2 e4 15.Be4 Ne4 16.Ne4 de4 17.c6 Bc6 18.Qc6+–) 14.Ne2 gh3 (14...c6 15.hg4 Ng4 16.a4+–) 15.Rh3 (better 15.c6 hg2 16.Rg1+–) 15...Ne4?? (better 15...Bc6+–) 16.c6 (16.Be4 de4 17.c6 Bc8 18.cd7 Bd7 19.Ne4 Rf8+–) 16...Nd2 17.cb7 (17.Qd2?! Bc6 18.Qc2 Bb7=; 17.cd7?! Qd7 18.Kd2 a5+–) 17...Rb8 18.Kd2 Rb7 19.Rc1 Qc8 20.Qc6 h5 (20...Ra7 21.Nf4 Kd8 22.Nh5+–) 21.Nf4 (21.Qa6 Qb8+–) 21...Bf8 (21...h4 22.Qa6 Qb8 23.Qc6+–) 22.Rh5 (better 22.Nh5 Rh6 23.Qa6+–) 22...Rg8 (22...Rh5 23.Nh5 Ra7+–) 23.Ne6! fe6 (23...Ke7 24.Nc7 Rc7 25.Qc7 Qc7 26.Rc7 Kd8+–) 24.Qe6 Kd8 25.Qg8 c6 26.Rf5 Kc7 27.e4 (better 27.Qe6 Kb6 28.Rf7+–) 27...Bh6 28.Ke1?? (better 28.Qg5! Bg5 29.Rg5+–) 28...Qg8–+ 29.ed5? (better 29.Rc2 Qg2 30.ed5–+) 29...Bc1 30.dc6 (30.Bc1 Qg2 31.Bf4 Kd8 32.dc6 Qc6–+) 30...Rb6 (better 30...Bb2 31.cb7 Ba3 32.Kf1–+) 31.cd7 (31.Bc1 Rc6 32.Bf4 Kd8 33.Be4–+) 31...Kd7 (better 31...Bb2 32.Re5 Ba3–+) 32.Bc1=+ Qg2 33.Be3 (33.Kd2 Rd6 34.Bb2 Rd5=+) 33...Rc6 (33...Qh1 34.Ke2–/+) 34.Rc5 (34.Rg5 Qh1 35.Ke2 Qa1 36.Rg7 Ke8–/+) 34...Qg1 35.Bf1 (35.Ke2 Rc5 36.dc5 Qa1=+) 35...Re6 (better 35...Rc5 36.dc5 Qg6–/+) 36.d5? (better 36.Ke2 Qh1 37.Rg5=+) 36...Re3–+ 37.fe3 Qe3 38.Be2 (38.Kd1 Qa3 39.Rc6 Qb4 40.Ra6 Qd4 41.Ke1 Qd5–+) 38...Qg3 (38...Qa3!? 39.Bg4 Kd6 40.Kf2 Qb4 41.Rc6 Kd5 42.Bf3 Kd4 43.Ra6 Qd2 44.Kg3 Qg5 45.Kf2 Qe3 46.Kg3–+) 39.Kd1 Kd6?? (better 39...Qb3 40.Rc2 Kd6–+ (40...Qd5?? 41.Rd2 Qd2 42.Kd2+–)) 40.Rc6=+ Kd5 41.Ra6 Qb3 42.Ke1 Kd4 43.Rd6 (43.Bb5? Qd5 44.Rh6 Qb5 45.Rh4 Ke3 46.Rh3 Kf4–+) 43...Ke3 (43...Ke4 44.Rd3 Qe6 45.Rc3=+) 44.Rd3= Qd3 45.Bd3 Kd3 46.Kd1 Kc3 47.Ke2 Kc4 48.Kd2 Kb3 49.Kd3 Ka3 50.Kc3 Ka4 51.Kc2 Kb4 52.Kb2 Kc4 53.Kc2 b4 54.Kb2 b3 55.Ka3?? (better 55.Kb1=) 55…Kc3–+ (55...Kc3 56.Ka4 b2 57.Kb5 b1Q 58.Kc5 Qd3 59.Kb6 Kc4 60.Kc6 Qd5 61.Kc7 Kc5 62.Kc8 Kc6 63.Kb8 Qb3 64.Kc8 Qg8) 0–1. alddhsfd (1700) – gurins (1685), lichess.org, 2019.

4.e3 Nh6 5.Nf3 Nc6 6.d4 f5 7.c4 d5 8.cd5 Qd5 9.Nbd2 Ng4 10.Bc4 Qd8 (better is 10...Qd6!?+/–) 11.Be6+– Qe7 (better is 11...a5 12.Qb3 Nh6+–) 12.Bf5 Nh6 13.Bd3 Qf6 14.0–0 Ng4 15.h3 Nh6 16.Qb3 Bd6 17.d5 Qf7 (17...Ne5+–) 18.dc6 Bc6 19.Qf7 Nf7 20.Be4 (better is 20.Bg7 Rg8 21.Bf6 h6+–) 20...Be4 21.Ne4 Be5 (21...Rg8+–) 22.Be5 Ne5 23.Ne5 0–0 24.Nf3 (24.Rac1!? Rfe8 25.f4 Re7+–) 24...Rad8 25.Rfd1 Rde8 26.Nc3 a5 (26...c6 27.Rd7 Rf7 28.Rad1+–) 27.ba5 ba5 28.Nb5 c5 29.Rac1 Rc8 30.a4 c4 31.Nd6 Rc6 32.Rc4 Rc4 33.Nc4 Rc8 34.Na5 Rc5 35.Nb3 Rc4 36.a5 Ra4 37.Ra1 Ra1 38.Na1 Kf8 39.a6 Ke8 40.a7 Kd8 41.a8Q Kd7 42.Nb3 h5 43.Nbd4 g6 44.Qc6 Kd8 45.Ne5 Ke7 46.Qd7 Kf6 47.Qe6 Kg5 48.Ndf3 Kh6 49.Qg6 1–0. Fournier,Frederic – lokeshhh@chesscube.com, ChessCube Game, 2008.

3.a3 f6

4.Nc3 a5=.

4.Nc3 d6 (4...d5 5.e3=) 5.f3 (5.e4 e6+=) 5...g6 6.e4 Bg7 7.Bc4 Nd7 8.Bg8 (8.Nge2!?+–) 8...Rg8= 9.Nge2 e5 10.0–0 Qe7 11.d4 0–0–0 12.d5 Kb8 (12...f5 13.Qd3+=) 13.a4 Bh6 (13...a6 14.Qd3+=) 14.b5 Nc5 15.a5 f5 16.ab6 cb6 17.Ra2 fe4 18.fe4 Be3 19.Kh1 Qh4 (19...Rgf8 20.Rf8 Rf8 21.Ba3=) 20.Qa1 a5? (better 20...Rdf8 21.Ba3 Rf1 22.Qf1 Qf2 23.Qf2 Bf2+=) 21.Na4?? (better 21.ba6 Bc8 22.Bc1 Bc1 23.a7 (23.Nc1?! Rdf8 24.a7 Ka8+–) 23...Ka8 24.Rc1+– (worse 24.Nc1 Bd7+–)) 21...Kc7?? (better 21...Ne4 22.Nac3 Nf2 23.Rf2 Qf2–+) 22.Nc5 dc5? (better 22...Bc5 23.Rf7 Rd7=) 23.Be5+– Kd7?? (23...Kc8 24.Ra4 Qg4 25.Rf3+–) 24.Bg3 (better 24.Rf7 Ke8 25.Rb7 Qe4+–) 24...Qe4 (24...Qe7 25.Ra4+–) 25.Rf7 Ke8 26.Rb7 Qd5 27.Rb6 Rf8 28.Ng1 c4 (28...Bg1 29.c4 Qd4 30.Qe1 Be3+–) 29.Qe1 Qd4 (29...Qe4 30.Ra3 Rf1 31.Re3 Re1 32.Re1 (32.Re4?! Re4 33.Ra6 c3+–) 32...Qe1 33.Be1+–) 30.Re6 Kf7 31.Re3 Rde8 32.Qf1 Kg8 33.Rf3 Qb6 (33...Qc5 34.Ra5 Rf3 35.Nf3+–) 34.Qc4 Kh8 (34...Kg7 35.Bf2 Qe6 36.Qe6 Re6 37.Rf8 Kf8 38.b6+–) 35.c3 (35.Rf8 Rf8 36.Be5 Rf6 37.Qf7 Qd8 38.Bf6 Qf6 39.Qf6 Kg8 40.Ra5 h6 41.Ra8 Kh7 42.Qe7) 35...Rc8 (35...Rf5 36.Rf5 gf5+–) 36.Be5 (36.Be5 Qf6 37.Rf6 Kg7 38.Rf7 Kg8 39.Rc7 Rf7 40.Qf7) 1–0. alt20 – dandarie, lichess.org, 2015.

4.c4 e5 5.d4 d6 6.c5 bc5 7.de5 de5 8.Qd8 Kd8 9.bc5 Bc5 10.Nf3 Bf3 11.e3 Bb7 12.Bc4 Ba6 13.Ba6 Na6 14.0–0 Bd6 15.Rd1 Ne7 16.Nc3 Nc5 17.Nb5 Kd7 18.h3 a6 19.Nc3 Rab8 20.Rab1 Rb3 21.Ne2 Rhb8 22.Rd2 Na4 23.Nc1 Rb2 24.Rdb2 Rb2 25.Rb2 Nb2 26.Nb3 Ba3 0–1. zosiaka – aufi, kurnik, 2012.

4.c4 e5 5.e3 Be7 6.d4 d6 7.de5 (7.Qg4 g6+=) 7...de5 (7...fe5 8.Qh5 g6 9.Qh3=) 8.Qd8+= Kd8 9.Nf3 Bd6 10.Be2 Ne7 11.Nbd2 Nbc6 (11...c5 12.Bc3+=) 12.0–0 a5 13.b5 Nb8 14.Rfd1 Ke8 15.Bd3 Kf7 (15...Nd7 16.Ne4+=) 16.Be4 Be4 17.Ne4 Ke6 18.Nd6 (18.Rd2 Nc8+/–) 18...cd6+= 19.Nd2 Nd7 20.Ne4 Rhd8? (better is 20...d5 21.cd5 Nd5+=) 21.Nd6?? (better is 21.Rd6 Kf7 22.Rad1+–) 21...Nc5–+ 22.f3 Rd6 23.e4 Rd1 24.Rd1 Ng8 25.Kf2 Ke7 26.Ke3 Rd8 27.Rd8 Kd8 28.g3 Kd7 29.f4 Kd6 30.fe5? fe5 0–1. Fournier,Frederic (1820) – ptac85 (1740), Active (1/0), 2005.

4.d3 e5 5.e4 Qe7 6.c4 d6 7.Ne2 Nd7 8.g3 0–0–0 9.Bg2 g6 10.a4 f5 11.Nbc3 Bg7 12.Nd5 Bd5 13.cd5 fe4 14.de4 Ndf6 15.f3 Qd7 16.Qc2 Kb8 17.0–0 Ne7 18.a5 Qb5 19.ab6 cb6? (better is 19...Qb6 20.Kh1 h5+–) 20.Qb3?? (better is 20.Ra7! Rd7 21.Ra4 Nfd5 22.ed5+–) 20...Rc8?? (better is 20...Qe2 21.Ra2 Qb5–/+) 21.Nc3+/– Qc4 22.Qa4 a5 23.ba5 Qa4 24.Ra4 ba5 25.Ra5 Rc5 26.Ra6 Nc8 27.Rb1 Kc7 28.Ba3 Rc3 29.Bb4 Rc4 30.Ba5 Kd7 31.Bf1 Rc2 32.Rb7 Ke8 33.Rg7 Nd7 34.Bb5 Rc1 35.Kg2 Rc2 36.Kh3 Ncb6 37.Bb6 Rb2 38.Bd7 Kf8+– 39.Bc7 Kg7 40.Bd6 Rd8 41.Be5 Kh6 42.Bb2 Rd7 43.Be5 Kh5 44.Bf4 h6 45.g4 1–0. cibis – carmo13, kurnik, 2011.

4.e3 Nc6 5.d4 e6 6.b5 Nce7 7.Nd2 Nd5 8.Ngf3 Nh6 9.c4 Ne7 10.Be2 d6 11.0–0 Qd7 12.h3 0–0–0 13.Rc1 Kb8 14.a4 g5 15.Nh2 Rg8 16.Bf3 d5 17.a5 Nef5 18.Ng4 (18.cd5!? ed5 19.Qa4+/–) 18...Ng4+= 19.Bg4 Rh8? (19...dc4 20.Qa4+=) 20.Qc2 (20.cd5!? Qb5 21.Qc2 Bb4+–) 20...h5 21.Bf5 ef5 22.a6 Ba8 Black plans g4 23.c5 h4 24.cb6 cb6 25.f4 g4 26.Qd3 gh3 27.gh3 Qe7 28.Ra1 Qg7 29.Kh2?? Qg3–+ 30.Kh1 Qh3 31.Kg1 Rg8 32.Kf2 Qh2 33.Ke1 Qg3 34.Kd1 Bb4 35.Kc2 Rc8 36.Kb3 Bd2 37.Qd2 Rge8 38.Rae1 Qg7 39.Rg1 Qc7 40.Rc1–/+ Qd7 41.Rc8 Rc8 42.Rc1?? Rc1 43.Qc1 Qg7 44.Qe1+= h3 45.Qf2 Qg2 46.Qh4= Qg7 47.Qh3+/– Qd7 48.Ka4 Kc7? 49.Qh8+– (49.Qh8 Bc6 50.bc6 Qc6 51.Ka3+–) 1–0. mihai740609 – egerbeshi09, kurnik, 2011.

4.e3 g5?? 5.d4 Bg7 6.Nd2 Nc6 (better is 6...h5!?+=) 7.b5+– Na5 8.c4 d5 9.Qh5+– Kf8 10.h4 dc4 11.Nc4 Nc4 12.Bc4 Bd5 13.Bd5 Qd5 14.Qf3 Qf3 15.Nf3 gh4 16.Nh4 Nh6 17.0–0 Ng4 18.Nf5 Kf7 19.f3 Nh6 20.Ng7 Kg7 21.Rac1 Rac8 22.Rc6 Nf5 23.e4 Ne3?? 24.Rfc1 h5 25.Kf2 (25.Rc7?! Rc7 26.Rc7 Kf7+–) 1–0. mihai740609 – brunengii, kurnik, 2011.

4.e3 g5?? 5.Nf3 g4 6.Nh4 Nh6 7.Be2+=.

4.e3 g5?? 5.Nf3 Bg7 6.h3 Nh6 7.Be2 Nf5 8.e4 Nd6 9.d3 0–0 10.c4 f5 11.Nc3 fe4 12.de4 Be4 13.0–0 c6 14.Qd2?? Bf3–/+ 15.Bf3 e6?? 16.b5 Nc4 17.Qc2 Nb2 18.Qb2 d5 19.Qc2 Qd6 20.Rfd1 Nd7 21.Ne4 Qf4 22.Ng3 Ba1 23.Ra1 Ne5 24.Bh5 Qf6 25.Qb2 Nd7 26.bc6 Qb2 (26...Qb2 27.Rf1 Ne5–+) 0–1. mihai740609 – brunengii, kurnik, 2011.

4.e3 g5?? 5.Qh5.

4.e3 Nh6 5.Nf3 e6 6.Be2 Be7 7.0–0 0–0 8.d3 d5 9.Nbd2 Nd7 10.c4 c6 11.cd5 cd5 12.Rc1 Rc8 13.Qa4 a6 14.Qb3 b5 15.a4 Nf5 16.ab5 ab5 17.d4 Nd6 18.Nb1 Nc4 19.Na3 Bc6 20.Bd3 Ndb6 21.Rfe1 Bd6 22.e4 Qe7 23.Bc3 Na3 24.Qa3 Nc4 25.Qb3 Ra8 26.Ra1 Ra2?? 27.Qa2 Ra8 28.Qb3 Ra1 29.Ra1 de4 30.Ra6 ed3?? 31.Rc6+– Qd7 32.Rc4 bc4 33.Qc4 Kf7 34.Qd3 Qa7 35.h3 Qa2 36.g3 Qb3 37.Nd2 Qd1 38.Kg2 g6 39.Qe3 g5 40.Ne4 Bc7 41.Nc5 e5 42.de5 Qd5 43.Qe4 Qe4 44.Ne4 fe5 45.Ng5 Kg6 46.h4 h6 47.Ne6 Bd6 48.Nd8 Kf5 49.Nb7 Bc7 50.Nc5 Bb6 51.Kf3 h5 52.Ke2 Bc5 53.bc5 Ke6 54.Bb4 Kd5 55.Kd3 (55.Kd3 e4 56.Ke3+–) 1–0. exp2005 – wts144, kurnik, 2011.

4.e3 e5

5.Nf3 (--> 3.e3 f6 4.Nf3 e5 5.a3).

5.Qh5 g6 6.Qh4 Nc6 7.Nf3 Qe7 8.Be2 Qe6 9.0–0 0–0–0 10.c4 Nce7 11.a4 (better is 11.Rc1!?=) 11...Nf5–/+ 12.Qh3 Bb4 13.d3 h5 14.d4? (14.Bc3 Bc3 15.Nc3 g5–/+) 14...Be4 (better is 14...ed4 15.Nd4 Nd4 16.Bd4 Qh3 17.gh3 d5–+) 15.d5 Qe7 16.Nc3 Bf3 17.Bf3 d6?? (17...Re8 18.Rfb1=) 18.Nb5?? (better is 18.e4 Qd7 19.ef5 Qf5 20.Qf5 gf5 21.Rab1+–) 18...Kb7 19.Rfb1 Bd2 20.a5 Ba5 21.Bc3 Ngh6?? 22.Ba5 Rc8? 23.Bb4 a6 24.Nc3 Nf7 25.Ra3?? Ng5–+ 26.Qf5 gf5 27.Rba1 Ra8 28.h4 Nf3 29.gf3 Qg7 30.Kh2 Qg6 31.Rg1–+ Qh7 32.Ne2 f4! 33.ef4 Qc2 34.Re1 Qc4 35.Ra4 Qd5 36.Nc3 Qf3 37.Re2 Qf4 38.Kg2–+ Rhg8 39.Kf1 Qc1 40.Re1 Qd2 41.Nb5 Qd3 42.Re2 Qb5 43.Ra1 Qb4 44.Ree1 Qh4 45.Ke2 Rg4 46.Kd2 Qf2 47.Kd1 Rd4 48.Kc1 Qe1 49.Kb2 Rd2 50.Ka3 Qa1 51.Kb3 Qb2 52.Ka4 Rd4 0–1. pieeater – Mphilliber, ChessWorld.net, 2011.

3.a3 Nf6

4.c4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.c4 Bb7).

4.e3 d5 5.Nf3 Nbd7 6.Rg1 (6.Bf6 Nf6 7.d4 e6=) 6...e6 7.g4 Bd6?? (better 7...h6=) 8.g5+– Ne4 9.d3 (worse 9.Bg7 Rg8 10.Bh6 Ne5+=) 9...Nf2 (9...a5 10.de4 de4 11.Nfd2 (11.Bg7?! Rg8=) 11...ab4 12.ab4 Ra1 13.Ba1+–) 10.Kf2+– Rg8 (10...0–0 11.Nc3+–) 11.h4 (11.d4 a5+–) 11...Qe7 (11...a6 12.Ke1+–) 12.Nbd2 0–0–0 (12...a5 13.b5+–) 13.Qe2 (13.c4 h6+–) 13...f6 (13...h6 14.Ke1+–) 14.Bh3 fg5 (14...e5 15.Ke1+–) 15.hg5 Rdf8 (15...Nf8 16.Ke1+–) 16.Raf1 (16.Ke1 Kb8+–) 16...Ne5 (16...c5 17.bc5 Nc5 18.Ke1+–) 17.Ke1 (17.Be5 Be5 18.Ke1 Bc3+–) 17...Ng6 (17...Nf3 18.Nf3 Kb8 19.Bg4+–) 18.Nd4 Kb8 (18...Rf1 19.Rf1 Kb8 20.Be6+–) 19.Ne6 (19.Be6 Rf1 20.Rf1 Rf8+–) 19...Rf1 20.Rf1 (better 20.Nf1 Ne5 21.Kd1+–) 20...Re8? (20...Bc8 21.Nd4 Qg5 22.Bc8 Kc8+–) 21.Ng7 (worse 21.Bg7 Qd7 22.Bd4 Re6+–) 21...Rd8 (21...Nf4 22.Rf4 Bf4 23.Ne8 Bg3 24.Kd1 Qe8 25.e4 de4 26.Ne4+–) 22.Nf5 (better 22.Bf6!? Qf7 23.Bd8 Qg7+–) 22...Qe8 (22...Qg5 23.Qg2 Qg2 24.Bg2+–) 23.Nd6 (23.Bf6 Be7 24.Ne7 Ne7+–) 23...Rd6 24.Nf3 (24.c4 Rd8+–) 24...Rd8 (24...Bc8 25.Bc8 Kc8 26.Nd4+–) 25.Nd4 a5 (25...Bc8 26.Bc8 Rc8 27.b5+–) 26.Ne6 (26.ba5 ba5 27.Rf6 a4+–) 26...Rd6 27.ba5 (27.Ng7 Qb5 28.Nf5 Rd8+–) 27...ba5 (27...Bc8 28.Ng7 Qb5 29.Bc8 Qb2 30.Nf5+–) 28.Ng7 (28.Nc5 Bc8 29.Bc8 Kc8+–) 28...Qb5 (28...Qa4 29.Kd2+–) 29.Nf5 (better 29.Bd4 Bc8 30.Nf5 Rd8+–) 29...Qb2 30.Nd6 cd6 31.Qd2 (better 31.Kd2 Qa3 32.Rb1+–) 31...Ne5 (31...d4 32.Ke2+–) 32.Ke2 (better 32.Rf8!? Kc7 33.Qa5 Qb6 34.Qb6 Kb6+–) 32...Qb5 (32...Qa3 33.Be6+–) 33.Qc3 Ka7 (33...Qe8 34.Bg2 a4 35.Qb4+–) 34.Kd2 (34.Qd4 Ka6+–) 34...Qb6 (34...Qc5 35.Qc5 dc5 36.Bg2+–) 35.a4 (35.Qd4 Ka6+–) 35...Nc6 Black intends d4 (35...Nf3 36.Ke2 d4 37.ed4 Nd4 38.Kd1 Ka6+–) 36.Rf7 (better 36.d4 Qd8 37.Rf7 Qe8 38.Rh7 Qg6+–) 36...d4 (36...Ne5 37.Re7 (worse 37.Rh7 Nf3 38.Ke2 Ng5+–) 37...Qd8 38.Rh7 Nf3 39.Ke2 Ng5 40.Rd7+–) 37.ed4 Nd4 (37...Kb8 38.Bg2 Nd8 39.Bb7 Nb7 40.Rh7 Nd8+–) 38.Bc8 (better 38.Bg2! Qc5 39.Qc5 dc5 40.Rb7 Ka6 41.Rh7 c4+–) 38...Nf3 39.Ke2 Nd4 40.Kf1 Qb1 41.Kf2 Qc2 42.Qc2 Nc2 43.Rb7 Ka8 44.Rb2 (44.Rh7 Nb4 45.g6 Nd5 46.Bb7 Kb8 47.Bd5 Kc8 48.Rb7 Kd8 49.g7 Ke8 50.g8Q) 44...Nb4 45.Bb7! Ka7 (45...Kb7 46.Ke3 Combination) 46.Ke3 (better 46.Be4 Ka6 47.Bh7+–) 46...Nd3 (46...Kb7 47.Rh2 Kc6+–) 47.Kd3 d5 48.Kd4 (48.Bc6 Ka6 49.Kd4 Ka7 50.Rb7 Ka8 51.Re7 Kb8 52.Kc5 Kc8 53.Kb6 h5 54.Re8) 48...h5 (48...Kb8 49.Bd5 Ka7 50.Rb7 Ka8 51.Rh7 Kb8 52.g6 Kc8 53.g7 Kd7 54.g8Q Kd6 55.Qe6) 49.Kd5 h4 (49...Kb8 50.Bc6 Ka7 51.g6 h4 52.g7 h3 53.g8Q h2 54.Qa8) 50.Kc6 h3 51.Kc7 h2 52.Bh1 (52.Rb6 h1Q 53.Ra6) 52...Ka6 53.Rb8 Ka7 54.Ra8 1–0. FeegLood (2740) – GoGSWarriors_30 (2480), lichess.org, 2017.

4.e3 d6 5.Nf3 Nbd7 6.Be2 g6 7.c4 Bg7 8.d4 0–0 9.Nbd2 Ne4 10.Ne4 Be4 11.Bd3 Bd3 12.Qd3 c5 13.Qd2 Rc8 14.Rc1 cd4 15.Bd4 Nf6 16.Qb2 (16.0–0 Qd7+=) 16...Nh5 (16...e5 17.Bc3 Rc4 18.Nd2–/+) 17.0–0 (17.Bg7 Ng7 18.0–0 Ne6+=) 17...Bd4 (17...e5!? 18.Bc3 Rc4+=) 18.Qd4 Ng7 19.Rc2 Ne6 20.Qd2 Qd7 21.Rfc1 Qb7 22.Nd4 Nd4 23.ed4 Rfe8 24.c5 bc5 25.dc5 dc5 26.Rc5 Rc5 27.Rc5 Rc8 28.Rc8 Qc8 29.g3 Qc7 30.Qe3 Qb7 31.f3 e6 32.Kg2 a6 33.Qc5 Qd7 34.Qc3 Qb5 35.Qe3 a5 36.ba5 Qa5 37.g4 Qa4 38.Qd3 Kg7 39.Qc3 Kg8 40.Qc8 Kg7 41.Qc3 Kg8 42.Qc8 Kg7 43.Qc3 ½–½. Fournier,Frederic (1650) – Katakrov (1645), Active, 2006.

4.e3 d6 5.d4 e6 6.Nf3 g6 7.Be2 Bg7 8.0–0 0–0 9.c4 Nbd7 10.Nc3 Rc8 11.Qa4 a6 12.b5 a5 13.Qc2 d5 14.a4 Ne4 15.Ne4 de4 16.Nd2 f5 17.c5 bc5 18.dc5 c6? (better is 18...Bb2!? 19.Qb2 Nc5+=) 19.Bg7+– Kg7 20.Rfd1 Qe7 21.Qb2 e5 22.Rac1 Nc5= 23.bc6 Bc6 24.Qb6? Ba4–+ 25.Re1 Nd3 26.Bd3 ed3 27.Qa5 Bc2 28.g3 e4 29.Qa1 Qf6 30.Qf6 Rf6 31.f3 Re6 32.fe4 fe4 33.Kf2 Rf8 34.Kg2 h6 35.Ra1 Rf7 36.Ra8 g5 37.Rea1 Kg6 38.R8a6 Rff6 39.Re6 Re6 40.h3 Kf6 41.Ra8 Kg7 42.Ra7 Kg6 43.Ra8 Kg7 44.Rb8?? Kf7 45.Nc4? Ra6–+ 46.Ne5 Ke7 47.Rb7 Kd6 48.Nc4 Kc6 49.Rh7 Ra2 50.Rh6? Kc5 51.Nd2 Bd1 52.Rg6 Rd2 53.Kf1 Rh2 54.Rg5 Kc4 55.Ke1 Bf3 56.Rg7 d2 57.Kf1 d1Q 0–1. mihai740609 – slonosieplaci, kurnik, 2011.

4.e3 e5 5.Be5+= Ne4 6.Bc4 (6.Qg4 a5+/–) 6...Nc6 (better is 6...Qg5 7.Nf3 Qg2=) 7.Qg4?? (better is 7.Bd5 Nf6 8.Bf6 Qf6 9.Nc3+/–) 7...Ne5–+ 8.Qh5 (8.Bf7 Nf7 9.Nf3–+) 8...g6 (better is 8...Nc4 9.Nf3 g6–+) 9.Qe5+– Be7 (9...Qe7 10.Qh8 Nf6+–) 10.Qh8 Bf8 11.Qe5 (11.Qe5 Qe7 12.Qe7 Be7 13.Nf3+–) 1–0. Childress,Steven A – Ahmed,Suzanne, IECC, 2000. (=1.a3 Nf6 2.b4 b6 3.Bb2 Bb7)

4.e3 e5 5.Be5!? Be7 6.Nf3+=.

4.e3 e5 5.f3 d6 6.Ne2 c5 7.Ng3 cb4 8.ab4 Be7 9.Be2 0–0 10.0–0 Nbd7 (10...a5 11.b5=) 11.f4 (11.b5 Re8+=) 11...ef4 12.ef4 Nd5 (12...a5 13.ba5 ba5 14.Nf5=) 13.Bf3 Nf4?? (better is 13...Bf6 14.c3 b5=) 14.Bb7+– Ng2 (14...Rb8 15.Ra7 Bf6 16.Bf6 Qf6+–) 15.Kg2 Bh4 16.Ba8 Qa8 17.Qf3 Qd8 18.Qc3 Ne5 19.d4 Bg3 20.hg3 Qg5 21.de5 de5 22.Qe5 f5 23.Qg7! Qg7 24.Bg7 Kg7 25.c4 Rc8 26.Ra7 Kg6 27.c5! bc5 28.bc5 Rc5 29.Nd2 Rc2 30.Rf2 Kg5 31.Kf3 h5 32.Ra5 Rc3 33.Kg2 Kg4 34.Nf3 h4 35.Ne5 Kg5 36.gh4 Kh4 37.Nf3 Kg4 38.Nh2 Kg5 39.Raf5 Kg6 40.Rf6 Kg5 41.R6f5 Kg6+– 42.R2f4 Kh6 43.Rh4 Kg7 44.Rg5 Kf7 45.Rf4 Ke6 46.Rf3 Kd7 47.Kg3 Kc6 48.Rc3 Kd7 49.Rgc5 Ke6 50.Rc6 Kd7 51.Rc2 Ke7 ½–½. Fournier,Frederic (1935) – ZEUSATACK (1925), Active (1/0), 2004.

4.e3 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7).

4.Nf3 g6 5.d3 Bg7 6.e4 d6 7.Nbd2 0–0 8.Rb1 c5 9.c3 Nc6 10.b5 Na5 11.a4 d5 12.ed5 Nd5 13.c4 Nc3 14.Bc3 Bc3 15.Be2 Qc7 16.0–0 Rad8 17.Qc2 Bd2 18.Qd2 Nc4 19.Qh6 Bf3 20.dc4 Be2 21.Rfe1 Bc4 22.Rbc1 Bd5 23.Qg5 e6 24.h4 Rd7 25.h5 Qd8 26.Qg3 Qf6 27.h6 Rfd8 28.Qe3 Bb7 29.g4 Qh4 30.Qg3 Qh1 0–1. hrubieszow1 – piorun10, kurnik, 2012.

4.Bf6 ef6 5.e3 d5 6.d4 c6 7.Bd3 Nd7 8.Qh5 g6 9.Qf3 Bg7 10.Nd2 0–0 11.h4 f5 12.Nh3 Nf6 13.Nf4 Ne4 14.0–0–0 (better is 14.h5!?+=) 14...a5–/+ 15.b5 cb5 16.Bb5 Qd6 17.a4?? (better is 17.Nb1+=) 17...Qa3 18.Kb1 Nc3# 0–1. swislina – kwiktor, kurnik, 2012.

4.e3 g6

5.d3 Bg7 6.Nf3 e6 7.Be2 Qe7 8.c4 Nc6 9.b5 Na5 10.Nbd2 0–0–0 11.0–0 d5 12.Bc3 dc4 13.Ba5?? (13.d4 Nb3 14.Nb3 cb3 15.Qb3 Ne4+/–) 13...ba5?? (13...cd3 14.Bb4 Qe8 15.Re1 de2 16.Qe2+=) 14.dc4?? (better is 14.Nc4 Ne4 15.d4+–) 14...Ne4+= 15.Qc2 Ba1 16.Ne4 Bg7 17.Nfd2 f5 18.Nc3 e5 19.Na4 g5 20.c5 c6 21.Qc3 Qc7 22.b6+= ab6 23.Nb6 Kb8 24.Qa5 Rd5 25.Bc4 Rhd8 26.Bd5+– Rd5 27.Ndc4 f4 28.ef4 ef4 29.Nd6 Bd4?? The isolani on c5 becomes a target 30.Re1 Re5 31.Re5 Be5 32.Nb7 Qb7 33.g3 f3 34.Qe1 Qc7?? 35.Qd1 g4? 36.h3! h5 37.hg4 hg4 38.Nd7 Ka7?? 39.Qa4+– Kb7 40.Ne5 Qe5+/– 41.Qb4 Kc7?? 42.Qa5 Kd7 43.Qa7 Ke6 44.Qa5?? Qa1 45.Kh2 Qf1 46.Qe1 Qe1 47.a4 Qf1 48.a5 Qg2 0–1. mihai740609 – eibazz, kurnik, 2011.

5.Be2?? Bg2!? 6.Bf3 Bh1 7.Bh1 c6 –+.

5.Be2?? Bg7?? 6.d4 0–0 7.c4 e6 8.Nc3 a5 9.b5 c6 10.Bf3 Qc7 11.Nge2 cb5 12.cb5 Bf3 13.gf3 Nd5 14.Nd5 ed5 15.Rc1 Qd6 16.Qd3 Qe7 17.h4 d6 18.h5 Nd7 19.Nf4 g5 20.Nd5 Qe6 21.Nc7 Qb3 22.Qb3 a4 23.Qd3 Rad8 24.h6 Bf6 25.Rg1 Be7 26.Nd5 1–0. 1005010 – danielmitran, kurnik, 2012. (=1.a3 b6 2.b4 Bb7 3.Bb2)

5.Be2?? Bg7?? 6.Bf3 d5=.

5.Be2?? Bg7?? 6.h4 0–0 (6...Bg2 7.Rh2 Bb7 8.d4–/+) 7.h5 Bg2 8.Rh2 Be4 9.h6 Bh8 10.d3 Bf5 11.Nd2 Nc6 12.e4 Be6 13.Bf3 (13.b5 Na5=) 13...d5 (13...Ng4 14.Bh8 Nh2 15.Bg7 Nf3 16.Qf3–/+) 14.Nh3? (better is 14.e5 Nd7 15.d4=) 14...de4 15.Ne4 Ne4 16.Bh8 Nf2?? (better is 16...Qd6 17.Rh1 Kh8 18.Be4 Bd5–/+) 17.Kf2 Kh8 18.Qd2?? (better is 18.Bc6 Qd6 19.Qh1+/–) 18...Qd7 (better is 18...Qd4 19.Qe3 Qa1 20.Bc6 Rad8–+) 19.Qc3=+ f6?? (better is 19...Nd4 20.Ba8 Ra8=+) 20.Re1?? (better is 20.Bc6 Qd6 21.Kg1+–) 20...Bh3 (20...Bd5 21.Ng1–+) 21.Rh3 Qh3 22.Qc6 Qh6 23.Re7 Qd2 24.Re2 Qh6?? (24...Qf4 25.Re7–+) 25.Qc7?? (25.Re7 a5 26.b5–+) 25...Rae8–+ 26.Re8 Re8 27.Qf7 Qh2 28.Bg2?? (28.Kf1 Qh3 29.Kf2 Qh4 30.Kg2 Qg5 31.Kh3 Qf5 32.Kg2 Rc8–+) 28...Qf4 29.Kg1?? (29.Bf3 Qe3 30.Kg2–+) 29...Re1 30.Bf1 Qg3 31.Kh1 Rf1 0–1. IQIQIQ – chaser, Live Game Caissa's Web, 2004.

5.Nf3 (--> 4.Nf3 g6 5.a3).

5.Bf6 ef6 6.Nc3 Bg7=.

5.Bf6 ef6 6.d4 (6.Nf3 Qe7+=) 6...Bg7 (better 6...c5 7.c3 cd4 8.cd4 a5+=) 7.Be2?? (7.Nf3 0–0+=) 7...0–0?? (better 7...Bg2 8.Bf3 Bh1 9.Bh1 c6–+) 8.Bf3 Bf3 (8...c6 9.Ne2+=) 9.Qf3 (worse 9.gf3 f5=) 9...d5 (9...Nc6 10.Ne2+=) 10.c4+– c6 (10...Nd7 11.cd5 b5 12.Nc3+–) 11.cd5 Qd7 (11...Qd5 12.Qd5 cd5 13.Ne2+–) 12.dc6+– Nc6 13.Ne2 f5 (13...Rfd8 14.0–0+–) 14.0–0 Rac8 (14...Rfd8 15.Nbc3+–) 15.Nbc3 Ne7 16.Rac1 Rfd8 17.Rfd1 Qe6 (17...a6 18.a4+–) 18.Nf4 (18.b5 h6+–) 18...Qd6 (18...Qb3 19.Nb1+–) 19.Nb5 (19.Nd3 Qe6+–) 19...Qd7 20.Nc3 (20.a4 Rc1 21.Rc1 Rc8 22.Rc8 Qc8+–) 20...g5?? (20...Qd6 21.Qe2 a5+–) 21.Nfe2+– g4 (21...b5 22.Qh5 Bf6 23.Ng3+–) 22.Qg3 h5? (22...b5 23.Qh4+–) 23.h3 (better 23.Qh4!? Qd6+–) 23...Ng6 24.hg4 (24.Qh2 Bf8+–) 24...fg4 (24...h4 25.Qh2 fg4 26.Kf1+–) 25.Qh2 (better 25.e4+–) 25...Qf5? (better 25...h4!?+–) 26.Ng3+– Qd7 (26...Qe6 27.Qh5 Qb3 28.Nb1+–) 27.Qh5 Rc7 (27...Ne7 28.Nge4+–) 28.Nce2 (28.Nf5 g3 29.Ng3 Rdc8+–) 28...Rdc8 (28...Rc1 29.Rc1 Ne7 30.Qg5+–) 29.Rc7 Rc7 30.Nf5 Bf8 (30...Qa4 31.Ra1+–) 31.Qg4 Kh7 (31...Bd6 32.Nc3! Kf8 33.Ne4+–) 32.Neg3 (32.Nc3 Qe6 33.Ne4 Kg8+–) 32...Qa4 33.Ne4 Bg7 34.Kh2 (34.Ned6 Kg8+–) 34...Kg8 35.Kg3 Qc2 (35...Qa3 36.Qh3 (worse 36.Ng7 Kg7 37.Qg5 Re7 38.Qf6 Kf8+–) 36...Kf8 37.Rh1+–) 36.Rh1 Kf8 (36...Rc6+–) 37.Rh7 Ne5 (37...Bd4 38.ed4 Qb3 39.Kh2 Qe6+–) 38.Qg7 (38.Rg7?! Ng4 39.Rg4 Rc6+–) 38...Ke8 39.Qe5 (39.Qe5 Kd8 40.Rh8 Kd7 41.Qd6; 39.Nf6 Kd8 40.Qf8) 1–0. FeegLood (2620) – Blitzstream_twitch (2525), lichess.org, 2015.

5.d4 Bg7

6.c4 e6 7.Nc3 d6 8.Nf3 0–0 9.Bd3 Nbd7 10.0–0 Qe7 11.Nd2 c5 12.f3 a6 13.b5 ab5 14.Nb5 cd4 15.ed4 d5 16.Qb3 dc4 17.Nc4 Nd5 18.Rfe1 Qd8 19.Ncd6 Ba6 20.Rac1 Nf4 21.Bf1 Nf6 22.Qb4 N6d5 23.Qd2 Bb5 24.Nb5 Qd7 25.a4 Ra4 26.Bc4 Ra5 27.Nc3 Nc3 28.Bc3 Raa8 29.Qf4 Rac8 30.Bb4 Bd4 31.Kh1 Rfd8 32.Red1 e5 33.Qe4 Rc7 34.h3 Qc8 35.Qd3 b5 36.Bc3 Rc4 37.Bd2 Bb2 38.Rc4 bc4 39.Qc2 c3 40.Be3 Rd1 41.Qd1 c2 42.Qe1 c1Q 43.Bc1 Qc1 44.Qc1 Bc1 45.Kg1 Bf4 46.Kf2 h5 47.g3 Bg5 48.h4 Bd2 49.Ke2 Bc1 50.Kd3 Bb2 51.Ke4 Bd4 52.f4 Kg7 53.fe5 f5 54.ef6 Bf6 55.Kf4 Kf7 56.g4 Ke6 57.g5 Be5 58.Ke4 Bd6 59.Kd4 Kf5 60.Kd5 Bf4 61.Kc6 Kg4 62.Kd7 Kh4 63.Ke7 Kg5 64.Kf7 h4 65.Kg7 h3 66.Kf7 h2 67.Ke6 Be5 68.Kd5 Kg4 69.Ke4 ½–½. mihai740609 – xbass3, kurnik, 2012.

6.Nf3 0–0 7.c4 d6 8.Nc3 e6 9.Be2 a5 10.0–0 ab4 11.ab4 Na6 12.b5 Nb4 13.Qb3 c5 14.bc6 Nc6 15.Ra8 Qa8 16.Ra1 Qd8 17.Nb5 Na5 18.Qa4 Bc6 19.Bc3 Bb5 20.Qb5 d5 21.Ba5 ba5 22.Qa5 Qa5 23.Ra5 dc4 24.Bc4 Ne4 25.h3 Rc8 26.Bd3 Nc3 27.Rc5 Rc5 28.dc5 Bf8 29.c6 Nd5 30.Be4 Bd6? 31.Nd4 Nb4? 32.Nb5+– Bb8 33.c7 Bc7 34.Nc7 Na2 35.f4 Nc1 36.Kf2 f5 37.Bc2 Kf7 38.Ke1 Kf6 39.Kd2 Na2 40.Bb3 Nb4 41.Ne6 Ke7 42.Ng5 h6 43.Nf3 Kf6 44.Ne5 g5 45.g3 gf4 46.ef4 h5 47.Ke3 Na6 48.Bd1 Nc5 49.Bh5 Ne4 50.Bf3 Ng3 51.Kf2 Ne4 52.Be4 fe4 53.Ke3 Kf5 54.Nc4 Ke6 55.Ke4 (55.Ke4 Ke7 56.f5+–) 1–0. mihai740609 – bunia897, kurnik, 2011.

6.Nf3 0–0 7.Be2 d6 8.0–0 Nbd7 9.c4 c5 10.d5 e6 (10...b5 11.bc5 Nc5 12.Nc3=) 11.Nc3 (better is 11.de6!? fe6 12.Qd6+/–) 11...ed5 12.cd5 Nd5 13.Nd5 Bb2 14.Rb1 Bg7 15.b5 Nf6 16.Nf4 Qe7 17.Qc2 Be4 18.Qd1 (better is 18.Bd3 Bf3 19.gf3–+) 18...Bb1 19.Qb1 Rad8 20.Rd1 Ne4 (better is 20...d5!?–+) 21.Nd3?? (better is 21.Nd5 Qe6 22.Qc2–+) 21…Nc3 (21...Nc3 22.Qc2 Nd1 23.Bd1 d5–+) 0–1. mihai740609 – maudib (1605), kurnik, 2011.

6.Nf3 d6 7.Be2 Nc6 8.Kf1 Qd7 9.b5 Na5 10.Nbd2 0–0–0 11.g3 (11.Bc3!?+=) 11...e5 12.d5 (better is 12.Bc3!?=) 12...Nd5 13.c4 Ne7 14.Kg2 g5 15.h3 h5 16.Kh2 (better is 16.e4 Bh6 17.c5–+) 16...g4 17.hg4 hg4 18.Kg2 (18.Nh4 f5 19.e4–+) 18...gf3 (worse is 18...Bf3 19.Bf3 gf3 20.Qf3–+) 19.Bf3 Rh1 20.Qh1 (20.Kh1 Bf3 21.Qf3 e4 22.Qe4 d5 23.cd5 Bb2–+) 20...Rh8 (better is 20...Bf3 21.Nf3 Rh8 22.Nh4 Nc4 23.Rb1–+) 21.Bb7 Nb7 22.Qd1 (22.Qb1 Qh3 23.Kf3 Nc5–+) 22...Qh3 23.Kg1 (23.Kf3 e4! 24.Ne4 Bb2–+) 23...f5 (23...Qh1) 24.Nf3 Qh1 0–1. mihai740609 – eibazz, kurnik, 2011.

6.Nf3 d6 7.Be2 Qd7 8.0–0 Nc6 9.c4 0–0 10.b5 Na5 11.Bc3 Rfe8 12.Ba5 ba5 13.Qd2 e5 14.Qa5 ed4 15.Nd4 c5 16.bc6! Bc6 17.Nc6 Qc6 18.Bf3 Qb6?? (better is 18...Ne4 19.Nd2 Ba1 20.Be4 Re4 21.Ne4 Qe4 22.Ra1 Qc4+=) 19.Qb6+– ab6 20.Ba8 Ra8 21.Nd2 Nd7 22.Ra2 Nc5 23.Rb1 Ra6 24.h3 f5 25.Nb3 Na4 26.Rd2 Nc3 27.Re1 Ra3 28.Nd4 Ra4 29.Ne6 Rc4 30.Ng7 Kg7 31.Rd6 b5 32.Rd7 Kh6 33.Ra1 b4? 34.Rb7 Nd5 35.Rb5 Nc7 36.Rb7 Nd5 37.Rb1 g5? 38.Rb5 Nc3 39.R1b4 Rb4 40.Rb4 Nd5 41.Rb5 Nf6 42.Rf5 Kg6 43.Rf6! Kf6 44.f3 h5 45.Kf2 Kf5 46.e4 Kf4 47.g3 Ke5 48.Ke3 Kf6 49.f4 g4 50.hg4 hg4 51.e5 Kf5 52.Kd4 Kg6 53.Ke4 Kh5 54.Kf5 Kh6 55.Kg4 Kg6 56.f5 Kf7 57.Kg5 Ke7 58.Kg6 Kf8 59.g4 Kg8 60.Kf6 Kf8 61.g5 Kg8 62.g6 Kf8 63.Ke6 Kg8 64.Ke7 Kg7+– 65.f6 Kg8 66.f7 Kh8 67.f8Q 1–0. mihai740609 – eibazz (1655), kurnik, 2011.

6.Nf3 d6 7.g3 Nc6 8.Bg2 Qd7 9.b5 Na5 10.0–0 (better is 10.Qe2!?=) 10...Qb5–/+ 11.Qc1 0–0–0 12.Nbd2 Rdf8 13.c4 Qd7 14.Bc3 Nc6 15.d5 Nb8 16.Qc2 e6 17.e4 Nh5 18.Rfb1 Bc3 19.Qc3 f5 20.Ne1 fe4 21.Ne4 ed5 22.cd5 Bd5 23.a4 Qf7?? (23...Qe6 24.Qc2–/+) 24.f3 (better is 24.Nd6 Kd8 25.Nf7 Bf7 26.g4+–) 24...Be4–+ 25.fe4 Qf2 26.Kh1 a5 27.Nd3 Qe3 28.Rc1 c5 29.Re1 Qg5 30.Rab1 Nd7 31.Nf4?? Nf4–+ 32.gf4 Qf4 33.Rf1 Qe5 34.Qb3 Rf4 35.Qb5 Kc7 36.Qa6? Rhf8 37.Rfe1 Rb8 38.Bh3 Nf6 39.Qa7 Rb7–+ 40.Qa8 Ng4 41.Bg4 Rg4 42.Qg8 Qe7 43.h3?! Rf4 44.Qd5 Qd7 45.Rbd1 Qh3 46.Kg1 Rg4 47.Kf2 Rg2 48.Kf1 Qh1 0–1. mihai740609 – eibazz (1620), kurnik, 2011.

5.Nf3 Bg7

6.Bc4 0–0=.

6.d4 0–0 7.Be2 d6 8.0–0 Nbd7 9.c4 Ne4 10.b5 Ndf6 11.Nc3 e6 12.Nd2 Qe7 13.Nce4 Ne4 14.Ne4 Be4 15.Bf3 Bf3 16.Qf3 (worse is 16.gf3 a6 17.f4 Qd7+=) 16...Qg5 17.g3 h5 18.h4 Qe7 19.Rfd1 Rac8 20.Qb7 Ra8 21.a4 Rfc8 22.a5 Qd8 23.Rdc1 Rcb8 24.Qc6 Kh7 25.Ra2 a6 26.Rca1 ab5 27.cb5 ba5 28.Ra5 Ra5 29.Ra5 Rb6 30.Qc4 Qb8 31.Qa4 c6 32.Ra8 Qb7 33.Ra7 Qb8 34.Rf7 Rb5 35.Ba3 Rb1 36.Kg2 Qb5? 37.Qb5+– cb5 38.Bd6 b4?? 39.Be5 b3 40.Rg7 Kh6 41.Rb7 b2 42.e4 g5 43.d5 ed5 44.ed5 gh4 45.gh4 Kg6 46.Rb2 Re1 47.Bg3 Kf5 48.Rd2 Re4 49.d6 Kg4 50.d7 (50.d7 Rf4 51.d8Q Rf2 52.Kf2 Kf5 53.Qd7 Ke4 54.Qe6) 1–0. mihai740609 – chmielu1971, kurnik, 2011.

6.d4 0–0 7.Be2 d6 8.0–0 e6 9.c4 c5 10.Nbd2 cd4 11.ed4 d5 12.h3 dc4 13.Nc4 Na6 14.Rc1 Bf3 15.Bf3 Rc8? (15...Nd5 16.Re1+=) 16.Ne5 (16.Bb7!? b5 17.Bc8 (17.Ba6?! Rc4 18.Qe2 Rc1 19.Rc1 Nd5+/–) 17...Qc8 18.Ne3+–) 16...Nd5 17.Nc6 Qd7 18.b5 Nb8 19.a4 Nc6–/+ 20.bc6 Rc6 21.Qb3 Rc1 22.Rc1 Nf4 23.Qe3 g5 24.Kh2 Qa4 25.g3 Qa2 26.Ba3 Rd8 27.gf4 Bd4 28.Qd3 Qf2 29.Bg2? Qg1!! 30.Rg1 Bg1 31.Kg1 Rd3 32.Be7 gf4 33.Kf2 a5 34.Bc6 Rb3 35.h4 Rb2 36.Kf3 b5 37.Kf4 b4 38.Bf6 b3 39.Bb2+– Kf8 40.Bc3 f6 41.Ba4 e5 42.Ke4 Ke7 43.Bb3 Kd6 44.Ba5 1–0. mihai740609 – bunia897, kurnik, 2011.

6.d4 0–0 7.Be2 d6 8.0–0 e6 9.c4 Nbd7 10.Nbd2 a6 11.Rc1 c5 12.Qc2 Rc8 13.Qb3 Qe7 14.Rcd1 Ne4 15.Ne4 Be4 16.Nd2 Bb7 17.Bf3 Bf3 18.Nf3 Rb8 19.Rd2 b5 20.Rfd1 bc4= 21.Qc4 d5 22.Qa6 cb4 23.ab4 Ra8 24.Qd3 Rfb8 25.Bc3 Nb6 26.Ne5 Be5 27.de5 Na4 Exerts pressure on the isolated pawn 28.Rb1 Nc3= 29.Qc3 Rb4 30.Rc1 Rc4–/+ 31.Qb2 Rac8 32.Rdc2 Rc2 33.Rc2 Rc2 34.Qc2 Qa3 35.Qc1?? Qc1 0–1. mihai740609 – delnik, kurnik, 2011.

6.d4 d6 7.Be2 Nc6 8.b5 Na5 9.Nbd2 Qd7 10.0–0 0–0 11.h3 c5 12.c4 cd4 13.ed4 d5 14.Bc3 (better is 14.c5!?+/–) 14...dc4 15.Ba5 ba5 16.Nc4 Qb5 17.Rb1 Qd7 18.Na5 Bf3 19.Bf3 Rad8 20.Rb7 Qd4 21.Qd4 Rd4 22.Ra7 Ra4 23.Nc6 Ra7 24.Na7 e5 25.a4 e4 26.Be2 (26.Bd1!?=) 26...Ra8–/+ 27.Nc6 Ra4 28.Re1 Nd5 29.Bb5 Ra1 30.Ra1 Ba1 31.Bc4 Nb6 32.Bb3 Kg7 33.Nd8 f5 34.g4 Kf6 35.Ne6 h6 36.gf5 gf5 37.Nf8 Bd4 38.Ne6 Bc3 39.Nf4 Ke5 40.Ng6 Kd4 41.Kg2 Nd5 42.Nf8 f4 43.Ne6 Ke5 44.Nc5 Nf6 45.Na4 Bb4 46.Nb2 h5 47.Bf7 h4 48.Nc4 Kd4 49.Nb6 f3 50.Kg1 Bc5 51.Na4 Nd5 52.Bg6? Nf4 53.Bf5? Ba7 54.Nb2 Kc3 55.Nd1 Kd2 56.Nb2 Ke2 57.Nc4 Bf2 58.Kh2 Bg3 59.Kh1 f2 60.Ne3 Ke3 61.Be4 f1Q (61...Ke4?!) 0–1. mihai740609 – eibazz (1630), kurnik, 2011.

6.d4 e6 7.Be2 Qe7 8.Nbd2 Nc6 9.b5 Na5 10.0–0 0–0–0 11.c4 Nh5 12.Bc3 g5 13.Ba5 ba5 14.Qa4 g4 15.Ne5 f5 16.Qa5 Kb8 17.c5 (better is 17.Qc3+–) 17...d6?? (better is 17...Be5 18.c6 Bh2 19.Kh2 dc6=) 18.Nc6+– Bc6 19.bc6 dc5 (19...Ka8 20.Ba6 Rb8+–) 20.Qb5 Ka8 21.Qb7 1–0. mihai740609 – aser0et, kurnik, 2011.

6.Be2 0–0 7.0–0=.

6.Be2 d6 7.c4 0–0 8.d3 a6 9.Nbd2 Nbd7 10.0–0 c5 11.Bc3 e6 12.Qc2 Rc8 13.a4 Re8 14.b5 a5 15.Rab1 d5 16.Ne5 Ne5 17.Be5 Nd7 18.Bd6 Ne5 19.Be5 Be5 20.f4 Bg7 21.Nf3 Qd6 22.Ng5 h6 23.Nf3 Rcd8 24.Rfd1 e5 25.fe5 Be5 26.Ne5 Qe5 27.e4 de4 28.de4 Be4 29.Qb2 Bb1 30.Qe5 Rd1 31.Bd1 Re5 32.Kf2 Bd3 33.Bb3 Re2 34.Kg3 Rb2 35.Bd1 Bc4 36.Bf3 Ra2 37.Bc6 Ra4 38.Kf4 Bd5 39.Ke5 Be6 40.Kd6 c4 41.Kc7 c3 42.Kb6 c2 43.Ka6 c1Q 44.b6 Qc6 45.h3 Rb4 46.Ka7 Qb6 0–1. chocobom – delnik, kurnik, 2012.

6.Be2 Nh5 7.d4 c5 8.bc5 bc5 9.c3 (9.Nbd2 cd4 10.Bd4 Nf6+=) 9...cd4 (9...Qb6 10.Qc2=) 10.cd4+= Nf6 11.Qb3 (11.Nc3 0–0+=) 11...Bd5 12.Qc2 Be4 13.Bd3 (13.Qd2 Nc6 14.Nc3 Rb8+=) 13...Bf3= 14.gf3 Nc6 15.Ke2 (15.Nc3 Rb8=) 15...Rc8 16.Qb3 (16.Nc3 e5 17.Qa4 ed4=) 16...Rb8 17.Qa2 (17.Qc2 0–0+=) 17...0–0 18.Bc4 (18.Nc3 d5+=) 18...d5–/+ 19.Bb3? (19.Bd3 Qd7–/+) 19...e6?? (better is 19...Qb6 20.Nd2 Na5 21.Bd5 Nd5 (21...Qb2?! 22.Bf7 Kh8 23.Rab1 Qa2 24.Ba2+=) 22.Qd5 Qa6 (22...Qb2 23.Qa5 Qb7 24.Rhc1+/–) 23.Ke1 Rb2–+) 20.Nd2–/+ Na5 21.Bd1 Qc7 22.Rc1 Qb6 23.Bc3 Qa6 24.Ke1 Rfc8 25.Qa1 Bf8 26.Ba5 (26.Be2!? Nc4 27.a4+=) 26...Rc1 27.Qc1 Qa5 (27...Qa5 28.a4 Bb4–/+) 0–1. Fournier,Frederic (1825) – trents (1835), Active (1/0), 2005.

6.Be2 Nh5 7.Bg7 Ng7 8.0–0 0–0 9.d4 d6 10.c4 Nd7 11.Nbd2 Re8 12.Qb3 e5 13.de5 Ne5 14.Ne5 Re5 15.Nf3 Rf5 16.Nd4 Rg5 17.Bf3 Bf3 18.Nf3 Rh5 19.g4 Rh6 20.e4 Ne6 21.Qe3 Rh3 22.Kg2 Rf3 23.Qf3 Qg5 24.Kg3 Re8 25.h4 Qe7 26.Rfe1 Ng7 27.g5 Nh5 28.Kh2 Qe5 29.Kg1 Nf4 30.Rad1 Re6 31.c5 f6 32.cd6 cd6 33.gf6 Rf6 34.Qg4 Kg7 0–1. exp2005 – kot63 (1620), kurnik, 2012.

6.Bf6 Bf6 7.d4 Bg7 8.Be2 d6 9.0–0 Bf3 10.Bf3+/– d5 11.c4 c6 12.Qb3 e6 13.Nc3 0–0 14.cd5 cd5 15.Rac1 Nd7 16.Nb5 a6= 17.Nc3 Rc8 18.Na4 Qe7 19.Rc2 b5 20.Nc5 Nc5 21.Rc5 Rfd8 22.Rfc1 Rb8 23.Qc2 Rd7 24.Rc6 Bf6 25.Ra6+/– e5 26.de5 Be5 27.h3 Rd6 28.Rd6 Qd6 29.Qc5 Qc5+/– 30.Rc5 d4?? 31.ed4 Bd4+= 32.Rd5 Bb2 33.Be2 Ba3= 34.Rb5 Rb5 35.Bb5 Bb4 36.Kf1 Bd6 37.Ke2 Kg7 38.g4 f6 39.f3 h6 40.Ke3 g5 41.Bd3 Bf4 42.Kf2 Kf7 43.Bf5 Ke7 44.Ke2 Kd6 45.Kd3 Ke5 46.Be4 Kd6 47.Kc4 Ke5 48.Kc5 Ke6 49.Kc6 Ke7 50.Kd5 Be5 51.Kc6 Bf4 52.Kd5 Be5 53.Bf5 Bg3 54.Bg6 Bh4 55.Bf5 Bg3 56.Be4 Bf2 57.Bf5 Be3 58.Ke4 Bf4 (59.h4 Kd6=; 58...Bc5 59.f4=). Onkel_Luis – Koojo (1610), ICC, 2003.

3.a4 a6

4.b5 a5 5.e3 d6 6.Nf3 Nd7 7.d4 Ngf6 8.Be2 g6 (8...e6 9.0–0=) 9.Nbd2 Bg7 10.c4 0–0 11.0–0 e6 12.h3 Qe7 13.Qc2 Rfe8 14.Bd3 (14.e4 Nh5+=) 14...e5= 15.Rfe1?? (better 15.de5 de5 16.Ba3=) 15...e4–+ 16.Ne4 Be4 17.Be4 (17.Nd2 Bd3 18.Qd3 d5–+) 17...Qe4 (17...Ne4 18.Rad1–+) 18.Qe4 Ne4 0–1. GuestPPCJ – GuestLPXN, freechess.org, 2017.

4.b5 a5 5.e3 Nf6 6.Nf3 (6.f4 g6=) 6...e6= 7.d4 d5 8.Bd3 Bd6 9.0–0 Nbd7 10.Nbd2 0–0 (10...Ne4 11.c4=) 11.c4 Re8 (11...Ne4 12.cd5 ed5 13.Ne5=) 12.Qc2+= h6 (12...g6 13.Ne5+=) 13.Rac1 (13.Ne5 Be5 14.de5 dc4+=) 13...Rc8 (13...dc4 14.Bc4 Nd5 15.e4+=) 14.Ne5 1–0. GuestJVKF – GuestGMSM, freechess.org, 2020.

4.b5 a5 5.Nf3 Nf6+=.

4.b5 ab5 5.ab5 Ra1 6.Ba1=.

4.c4 Nf6 5.a5+=.

4.e3 a5 5.b5 d6 6.Nf3 Nd7 7.d4 Ngf6 8.Be2 g6 9.c4 Bg7 10.0–0 0–0 11.Qc2 e6 12.Nbd2 Qe7 13.Rfe1 Rfe8 14.e4 e5 15.Bd3 (15.d5 Rad8+=) 15...Nh5 (15...ed4 16.Bd4 Nc5 17.Bc5 dc5 18.Rad1=) 16.g3 (16.d5 Nc5=) 16...ed4= 17.Nd4 Nc5 The pressure on e4 grows 18.Bf1 Nf6 Can e4 get defended? (18...Be4? 19.Ne4 Ne4 20.f3+–; worse 18...Ne4 19.Bg2 f5 20.f3+–) 19.f3 Qd7 20.N2b3 Nb3 (20...Rad8 21.Rad1 Qe7 22.Nc5 dc5 23.Ne2=) 21.Nb3 Nh5 22.Nd4 Rad8 23.Qd2 Re7 24.Rad1 Rde8 25.Bg2 Qc8 26.Bc3 Bf6 (26...Nf6!?+=) 27.g4 Ng7 28.Nf5 Nf5 (28...gf5!? 29.Bf6 Re6 30.Bg7 Kg7 31.gf5 Re5+–) 29.Bf6+– (29.gf5?! Bc3 30.Qc3 Re5=) 29...Re6 30.Bc3 (30.Qc3 Rf6 31.Qf6 Re6+–) 30...Ng7 31.Qh6 f6 32.g5 Nh5 (32...Qd8 33.Bh3 (33.gf6?! Rf6 34.Bf6 Qf6+–; 33.Bf6?! Rf6 34.gf6 Qf6+–) 33...Re5 34.f4 (34.Be5?! Re5 35.gf6 Qf6+–) 34...Re4 35.Re4 Re4 36.gf6+–) 33.gf6 Nf6 34.Bh3 Qd7?? (34...Nh5+–) 35.Bf6 Qf7 36.Be6 Re6 37.Bc3 Re8 38.Bd4 (38.Re3 Bc8+–) 38...Bc8 39.Rd3 Re7 40.Qg5 Re8 41.Red1 Qc4 (41...Be6+–) 42.Qf6 Qd4 43.Rd4 Rf8 44.Qe7 Rf3 45.Rf1 Rf1 46.Kf1 (46.Kf1 Bg4 47.Qc7 Bc8 48.Rd6 Bh3 49.Kf2 Bd7 50.Rd7 Kf8 51.Qd8) 1–0. GuestGSGR – GuestTSVK, freechess.org, 2017.

4.e3 Nc6 5.b5= Na5 6.c4 (6.Nf3 e6=) 6...ab5 (better 6...Nc4!? 7.Bc3 ab5–/+) 7.ab5 (better 7.cb5!? Nf6 8.Nf3=) 7...Nc4!–/+ (7...Nc4 8.Bc4 Bg2 9.Bf7 Kf7–/+) 0–1. GuestXGPJ – Discanto, freechess.org, 2017.

4.e3 d5 5.Nf3 e6 6.c4 Bb4?? 7.Bg7 Nf6 8.Bh8 +–.

4.e3 d6 5.b5 a5 6.Nf3 Nd7 7.d4 Ngf6 8.Bd3 g6 (8...e5 9.de5 de5 10.Ne5 Ne5 11.Be5=) 9.0–0 Bg7 10.Nbd2 0–0 11.c4 e6 12.Qc2 Qe7 13.Rfe1 (13.e4 Rac8+=) 13...Rfe8 14.h3 e5 15.Be4 (better 15.de5!? de5 16.e4=) 15...Ne4–/+ 16.Ne4 f5 (16...ed4!? 17.Ned2 d3–/+) 17.Ned2= Bf3 (17...e4 18.Nh2=) 18.Nf3 e4 19.Nd2 Rf8 20.Rad1 Rae8 21.Nb1 g5 (21...Qg5 22.Nc3=) 22.Nc3 Nf6 23.Qb3 (23.Ne2 g4=) 23...Qf7 24.Nd5 (24.Ne2 g4=) 24...Nd5 25.cd5 Qh5 26.Rc1 Re7 27.Rc6 g4 28.Qd1 Qg5 29.hg4 fg4 (worse 29...Qg4 30.Qg4 fg4 31.Re2=) 30.Qb3 (30.Qc1 Qh4 31.Re2 Rf6–/+) 30...h5 (30...g3 31.Rc2 Ref7–+) 31.Rec1 Rff7 (better 31...g3 32.f3 Qh4–+) 32.Qc4? (32.Bc3 g3 33.Be1 h4–+) 32...h4 Black intends g3 (32...g3 33.fg3 Qe3 34.Kh1 Qg3 35.Qc3–+) 33.Qe2 (33.Rf1 g3 34.Qe2 h3 (34...Qd5?! 35.Rcc1–+) 35.fg3 Rf1 36.Qf1 Qe3 (36...Qd5?! 37.Qc4 Qc4 38.Rc4=) 37.Kh2 hg2 38.Kg2 Qd2 (38...Bd4?! 39.Bd4 Qd4 40.Qf5–+) 39.Kh3 Bh8–+) 33...Bh6 (better 33...g3 34.Rf1 h3 (34...Qd5?! 35.Bc3–/+) 35.fg3 Rf1 36.Qf1 Qe3 37.Kh2 hg2 38.Kg2 Qd2 39.Qf2 e3–+) 34.Ba3? (better 34.Rf1=+) 34...g3–+ 35.Rf1 gf2 (35...h3 36.Bd6 cd6 37.f4 ef3 38.Rf3 Rf3 39.Qf3–+) 36.Rf2 Qe3 (36...Qe3 37.Bc1 Qe2 38.Re2 Kh7–+) 0–1. GuestWSJS – GuestKXVT, freechess.org, 2018.

4.e3 d6 5.d3 e6 6.Nd2 Nd7 7.Ngf3 Ngf6 8.Be2 Be7 9.0–0 0–0 10.e4 e5 11.Re1 Ne8 12.c3 g6 13.Qb1 Bf6 14.Nb3 Bg7 15.d4 Qe7 16.d5 Bc8 17.Bc1 h6 18.c4 Nef6 19.Be3 Ng4 20.Bd2 Ngf6 21.Bd3 Kh7 22.Qc2 Nh5 23.c5! Nf4 (23...bc5 24.bc5 Combination; 23...dc5 24.bc5 Decoy) 24.Bf1 g5 25.c6 Nf6 26.Bf4 ef4?? (26...gf4 27.h3+–) 27.Rac1?? (better 27.e5 Kg8 28.ef6 Qf6 29.Nfd4+–) 27...Ng4+– 28.h3 Ne5 29.Nbd4 Kg8 30.Bc4 Nf3 31.Nf3 Be5 32.Rcd1 Qf6 33.Rc1 Qe7 34.Red1 f6 35.Be2 Qf7 36.Ne5 fe5 37.Bf3 Kg7 38.Qe2 Qf6 39.Rf1 Rh8 40.Rfd1 Qg6 (40...Rf8 41.a5 Rb8+–) 41.Ra1?? (better 41.Bh5 Qf6 42.Bg4+=) 41...h5–/+ Black prepares the advance g4 42.Kf1 (42.g4!? fg3 43.fg3 Bh3 44.a5–/+) 42...g4–+ 43.hg4 (43.a5–+) 43...hg4 (worse 43...Bg4 44.a5 b5 45.Ke1=) 44.Ke1 Rh1 (44...gf3 45.gf3 Kf8 46.Kd2–+) 45.Kd2 Rd1 46.Qd1 gf3 47.gf3 Kf6?? (better 47...Bh3–+) 48.Qh1+= Bf5 49.Rg1 Qh7 50.ef5 Qh1 51.Rh1 Kf5 52.Ke2 e4 (52...a5 53.b5 Kg6=) 53.fe4 (better 53.Rh7 b5 54.ab5 ab5 55.Rc7+–) 53...Ke4=+ 54.Rd1 (54.Rh5 f3 55.Kd2 Rg8–/+) 54...a5 (54...f3!? 55.Kd2 Kd5 56.Ke3 Kc6 57.Kf3 d5–/+) 55.b5=+ Rh8 56.f3 Ke5 57.Kd3 (57.Rg1 Rh2 58.Kd3 Ra2=+) 57...Rh2 (57...Rh3 58.Rf1 Kd5 59.Rf2–+) 58.Kc4 (58.Re1 Kd5 59.Re4 Rh4=) 58...Re2 (better 58...Rc2!? 59.Kb3 Rf2–/+) 59.Rh1= Re3 (59...Ra2 60.Re1 Kf5 61.Kb3=) 60.Rh5 (60.Rh7 Ra3 61.Re7 Kf6 62.Rc7 Ra4 63.Kd3 Ke5+=) 60...Kf6 61.Rh3 (better 61.Rh7 Ra3 62.Rc7 Ra4 63.Kc3+=) 61…Re2 0–1. alessandrocarvalhaes (1800) – djyug (1885), lichess.org, 2019.

4.e3 d6 5.Nf3 Nd7 6.c4 Ngf6 7.Be2 g6 8.d4 Bg7 9.Qc2 (9.0–0 c5=) 9...0–0 10.Nbd2 a5 (10...c5 11.bc5 dc5 12.a5=) 11.b5+= e6 12.0–0 Qe7 13.Rfe1 Rfe8 14.h3 (14.e4 e5 15.d5 h6+=) 14...e5 15.Rad1 e4 16.Nh2 h5 (16...Rad8 17.Ng4=) 17.g4 (17.Nhf1!?+=) 17...hg4= 18.Ng4 Ng4 19.Bg4 f5 20.Be2 Qh4 21.Bf1 g5 22.c5 dc5 (22...bc5 23.dc5 A) 23...dc5? 24.Nf3 ef3 25.Bc4 Kh8 26.Bg7 (26.Rd7?! Be5+–) 26...Kg7 27.Rd7 Kg6 28.Bf7 Kf6 29.Be8 Re8 30.Qc3 Re5 31.Re7+– (31.Rc7 Qh3 32.Rf7 Kg6 33.Rg7 Kh6 34.Rg5 Kg5 35.Qe5 Qg2; 31.Qa5 Qh3 32.Qb6 cb6 33.Rd6 Re6 34.Re6 Ke6 35.a5 Qg2); B) 23...Nc5=) 23.Qc4 (better 23.dc5 Nc5 24.Nb3 Bb2 25.Nc5 bc5 26.Qb2=) 23...Kh7?? (better 23...Kh8–/+) 24.Qf7+– Nf6 25.d5?? (better 25.dc5 Bd5 26.Qc7+–) 25...Bd5–/+ 26.Bf6?? (better 26.Qc7 Rac8 27.Qa7–+) 26...Bf7–+ (26...Bf7 27.Bg7 Kg7–+) 0–1. GuestLBYB – GuestGFQT, freechess.org, 2017.

4.e3 d6 5.Nf3 Nd7 6.Be2 e5 7.0–0 Ngf6 8.d4 (8.a5 b5=) 8...ed4 (8...e4 9.Nfd2=) 9.Nd4 Be7 10.Bf3 Bf3 11.Qf3 Ne5 12.Qe2 (12.Qg3 Qd7 13.Qg7 Rg8=) 12...0–0= 13.f4 Ned7 14.e4 c5 (14...Re8 15.Nc6 Qc8 16.e5 de5 17.fe5+= (worse 17.Be5 Ne5 18.fe5 Qe6–/+)) 15.Nc6 White plans e5 15...Qe8 16.Qf3 (worse 16.Ne7 Qe7 17.bc5 Nc5=+) 16...Rc8 (16...h6 17.b5+= (worse 17.Ne7 Qe7 18.bc5 Nc5=)) 17.b5 (17.e5 de5 18.fe5 Ne5 19.Ne5 cb4+–) 17...Nb8 18.e5 (better 18.Nb8 Rb8 19.Nc3+–) 18...Nc6? (better 18...de5 19.fe5 A) 19...Nc6? 20.ef6 (20.bc6?! Rc6 21.Rd1 Qc8+–) 20...Nd4 21.Bd4 cd4 22.fe7 Qe7 23.Qd1+–; B) 19...Nfd7 20.Nb8 Nb8+=) 19.ef6+– (19.bc6?! de5 20.fe5 Rc6+–) 19...Bf6 20.Bf6 gf6 21.bc6 Qc6 22.Nc3 Kh8 23.Nd5 Rce8 1–0. GuestWKWG – GuestVYCM, freechess.org, 2019.

4.e3 e5 5.Be5 (better 5.b5 ab5 6.ab5 Ra1 7.Ba1=) 5...Qg5 (better 5...Nc6 6.Bf4 Bb4=) 6.Nf3 Bf3 (6...Qd8 7.b5 ab5 8.ab5 Ra1 9.Ba1+–) 7.Qf3+– c6 (7...Nc6 8.Bc7 Bb4 9.c3+–) 8.d4 (better 8.Bc3+–) 8...Be7? (better 8...Bb4 9.c3 Ba5+–) 9.h4 Qg6 10.Bd3 Qe6 (10...f5 11.Nd2 Nh6+–) 11.Bg7 Bf6 12.Bh8 Bh8 13.Bh7 Bd4 14.c3 Bc3 (14...Be5 15.Bg8 Qg6+–) 15.Nc3 Nf6 16.Bd3 Qb3 (16...d5+–) 17.Qf6 Qc3 18.Qc3 (18.Qc3 d6 19.Qh8 Ke7 20.h5+–) 1–0. GuestSDVS – GuestBHTY, freechess.org, 2020.

4.e3 e6 5.Nf3 Bb4?? 6.Bg7+– f6 7.Bh8 Nh6 8.Nh4 Kf7 9.Qh5 Ke7 (9...Kg8 10.Qh6 Kh8+–) 10.Bg7 (better 10.Qh6 Qf8 11.Qh7 Qf7 12.Ng6 Ke8+–) 10...Nf7 11.Qh7 b5 (11...d5 12.Bh6 e5+–) 12.Ng6 Kd6 13.Qh4 (better 13.Bf8 Kd5 14.e4 Kc6 15.Bb4 a5+–) 13...Qg8 (13...c5+–) 14.Qb4 c5 15.Qf4 (better 15.Bf8 Qf8 16.Qf4 Ne5 17.Nf8 Nbc6 18.Qf6 Nb4+–) 15...e5 16.Qf6 Kd5 17.Ne7 (17.Ne7 Ke4 18.Nc3; 17.Nc3) 1–0. GuestSMPP – GuestKJGP, freechess.org, 2018.

4.f3 d6 5.e4 e5=.

4.Nf3 e6

5.g3 Bb4?? 6.Bg7+– Qe7 7.Bh8 Nc6 8.Bg2 0–0–0 9.Bc3 Bd6 10.0–0 h5 11.e3 Nf6 12.Bf6 Qf6 13.Nc3 Be7 14.Ne4 Qg6 15.Nh4 Bh4 16.gh4 Qg4 (16...Nb4 17.Ng3+–) 17.Qg4 hg4 18.Nf6 Rh8 19.h5 (worse is 19.Ng4 f5 20.f3 fg4 21.fg4 Ne5+–) 19...Kd8 20.f3 Ke7 (20...g3 21.hg3 Ke7 22.Ne4+–) 21.Ng4 Rh5 22.Bh3! f5?? 23.Nf2+– Ne5 24.Bg2 Rg5 25.Nh3 Rg7 26.Rf2 Nf3 27.Kf1 Nh4?? 28.Bb7 c6 29.Ba6 Ng6 30.Nf4 Ne5 31.Ke2 Ng4 32.Rg2 Rh7 33.Rh1 e5 34.Ng6 Kf6 35.Nf8 d5 36.Nh7 Kg6 37.Nf8 Kf6 38.Nd7 Ke6 39.Nb6 Kd6 40.h3 Nh6 41.Rg6 (41.Rg6 Ke7 42.Rh6+–) 1–0. wk1234 – aser0et, kurnik, 2012.

5.g3 Bb4?? 6.Bg7 Bf3 7.ef3 +–.

5.g3 d6 6.Bg2 c6 7.0–0 Qc7 8.e3 Ne7 9.Nh4 Nd7 10.Qg4 Rg8 11.Qh5 h6 12.Nc3 g6 13.Qe2 g5 14.Nf3 g4 15.Nh4 h5 16.h3 f5 17.hg4 fg4 18.Ne4 Bg7 19.Bg7 Rg7 20.f4 0–0–0 21.Ng5 Rg5 22.fg5 Rf8 23.Rf8 Nf8 24.Rf1 Neg6? (24...Nd7 25.Rf7 Qd8 26.b5 ab5 27.ab5+–) 25.Ng6 Ng6 26.Qd3 Qg7 27.Qd6 b5 28.Qe6 Kb8 29.Qe8 Ka7 30.Rf7 Qa1 31.Kh2 Ne5 32.Re7 Nf3 33.Bf3 gf3 34.Qf7 (34.Qf7 Qg1 35.Kg1 Kb8 36.Rb7 Ka8 37.Ra7 Kb8 38.Qc7#; 34.Qc6 Qg1 35.Kg1 f2 36.Kf2 ba4 37.Qb7#) 1–0. wk1234 – wiktunia, kurnik, 2012.

5.g3 d6 6.Bg2 Nd7 7.0–0 c6 8.Nd4 Qc7 9.a5 b5 10.e3 Ne7 11.Nc3 e5 12.Nf3 g6 13.Ne2 h6 14.d4 e4 15.Nd2 f5 16.d5 Ne5 17.f4 cd5 (better is 17...ef3!? 18.Bf3 Nd5 19.Bd5 cd5+=) 18.fe5+/– Bg7?? (better is 18...de5 19.Nb3 Nc6+/–) 19.ed6+– Qd6 20.Bg7 (20.Bg7 Rh7 21.Bc3+–) 1–0. wk1234 – wiktunia, kurnik, 2012.

5.g3 Nf6 6.c3 g6 7.Bg2 Bg7 8.0–0 h6 9.Nh4 g5 (better is 9...Bg2 10.Ng2 0–0+=) 10.Bb7+/– Ra7 11.Bg2 gh4 12.gh4 (12.e4 h5+/–) 12...Ng4 13.f3 Nf6 14.Qe1 Ng8 (14...Nd5!?=) 15.d4 Bf6 16.Qd2 Bh4 17.Qf4 Bg5 18.Qg4 Nf6 19.Qg3 Rg8?? (better is 19...Be3 20.Kh1 Rg8–/+) 20.f4+– Ne4? 21.Be4 Qf6 22.fg5 Qh8 23.h4 hg5 24.hg5 Qh5 25.Bc1 f6 26.g6 Qe2 27.Bf4 Qe4 28.Nd2 Qf5 29.Bc7 Qh5?? 30.g7 Qh7 31.Rf6 Rg7 32.Raf1?? Rg3? 33.Bg3+– Nc6 34.Rf8 Ke7 35.Nc4?? Rb7?? 36.Bd6# 1–0. wk1234 – tom1974aaa, kurnik, 2012.

3.a4 c6

4.b5 cb5 5.ab5 f6 6.Nf3 g6 7.g3 Bg7 8.Bg2 Nh6 9.0–0 Nf7 10.g4 e5 (10...Nd6 11.Na3=) 11.d4 (better is 11.Ne5!? Bg2 12.Nf7 Kf7 13.Kg2+/–) 11...d5= 12.de5 Ne5 13.Ne5 fe5 14.f4 Nd7? (better is 14...Qd7=) 15.Bd5+– Bd5 16.Qd5 Nc5 17.Qd8 Rd8 18.fe5 Nd7? 19.Ra7 Be5 20.Be5 Ne5 21.Rb7 Ng4 22.Rff7 Rd1 23.Kg2 Rb1? 24.Rbe7 Kd8 25.Rd7?? Ke8 26.Rfe7 Kf8 27.Rf7 Ke8 28.Rb7 Nh6 29.Rfc7 Kd8 30.Rd7 Kc8 31.Rh7?? Rh7–+ 32.Rh7 Nf5 33.e4 Ne3 34.Kf3 Nc2 35.Rg7 Rb5 36.Rg6 Nd4 37.Ke3 Nb3 38.h4 Rc5?? 39.Kf4?? b5–+ 40.Rb6 Nd2 41.e5? Re5 42.Ke5 Nc4 43.Kd5 Nb6 44.Kc5 Nd7 45.Kb5 Ne5 46.Kc5 Kd7 47.Kd5 Nf7 48.Ke4 Ke6 49.Kf4 Kf6 50.Kg4 Ke5 51.Kh5 Kf5 ½–½. wk1234 – badallaj1, kurnik, 2012.

4.c4 a6 5.d4 b5 6.ab5 ab5 7.c5 Ra1 8.Ba1 d6 9.Nf3 dc5 10.bc5 Nd7 11.e3 Ndf6 (11...e5!?+=) 12.Bd3+/– e6 13.0–0 Nd5 14.Qb3 Ngf6 15.Nc3 Nc3 16.Bc3 Nd5 (16...Bc5!? 17.Bb5 cb5 18.Qb5 Qd7+/–) 17.Bd2+/– Be7 18.Ra1 0–0 19.Ba5 Qb8 20.e4 Nc7 21.Ne5 Na6? (better is 21...Rd8 22.Qb4 Bg5+/–) 22.Nd7+– Qc8 23.Nf8 Bf8 24.Bb6 Nb8 25.Be2 Nd7 26.Qc3 Nb6+/– 27.cb6 Qd8 28.Qa5 Bd6 29.e5 Bb8 30.Rd1 f6 31.f4 fe5 32.de5 Qe7 33.Qd2 Qc5 34.Kh1 Qb6 35.Qd8 Qd8 36.Rd8 Kf7 37.Rb8 Ba6 38.Rb6 Bc8 39.Rc6 Kg6 40.Bb5 Bb7 41.Rb6 Bd5 42.Bd7 Kf5 43.Kg1 Kf4 44.Be6 Ke5 45.Bd5 Kd5 46.Rb7 g5 47.Rh7 Ke4 48.Kf2 Kf4 49.h3 g4 50.hg4 Kg4 51.Rf7 Kg5 52.Kg3 Kg6 53.Rf3 Kg5 54.Re3 Kg6 55.Kg4 Kf6 56.Kh5 Kf5 57.g4 Kf6 58.Re8 Kf7 59.Rh8 Kg7+– 60.Rh6 Kf7 61.Rg6 Kf8 62.Kh6 Kf7 63.Kh7 Kf8 64.Rg7 Ke8 65.g5 Kf8 66.g6 Ke8 67.Kg8 Kd8 68.Rf7 Ke8 69.g7 Kd8 70.Rf8 Ke7 71.Kh7 Ke6 72.g8Q Ke5 73.Qg4 Kd6 74.Rf5 Ke6 75.Qg6 Ke7 76.Rf7 Ke8 77.Qg8# 1–0. traktorzystaa – kakajer, kurnik, 2012.

4.c4 Nf6 5.f3 e6 6.b5 c5 7.Na3 d6 8.Nc2 Nbd7 9.e3 Be7 10.d4 Qc7 11.Ne2 0–0–0 (11...0–0 12.Nf4–/+) 12.Ng3 g5 13.h3?? (better is 13.a5!?=) 13...h5 Black prepares g4 14.e4? (14.Ne2 g4 15.e4 gf3 16.gf3 Ne5–+) 14...g4 15.hg4–/+ hg4 16.Rh8 Rh8 17.d5 ed5 18.cd5+= gf3 19.gf3 Ne5 20.Ne3 Rh2 21.Be5 de5 22.Ngf5 Bd6 23.Ng2 Nh5 24.Kf2 f6?? 25.Qd2?? Nf4 26.Kg1 Qh7 27.Nd6 Kb8 28.Nb7 Nh3?? 29.Kh2+– Nf2 30.Kg1 White plans a5 30...Nh3= 31.Kh2 Nf2 32.Kg3 Nh3?? 33.Bc4 Kb7 34.a5 Ng5 35.ab6 ab6 36.f4 Qh3 37.Kf2 ef4 38.Bd3 Qg3 39.Kf1 f3 40.Ne3 Nh3–+ 41.Ra7 Ka7 42.Qa2 Kb8 43.Ng2 fg2 44.Qg2 Qd3 45.Qe2 Qe2 46.Ke2 Ng5 47.Ke3 Kc7 48.Kf4 Kd6 49.Kf5 Nh7 50.Kg6 Ng5 51.Kf6?? Ne4 52.Kf5 Nc3 53.Kf6 Nb5 0–1. poganinbezdom – andrzejsul, kurnik, 2011.

4.e3 Qc7 5.c4 d6 6.Nf3 Nd7 7.b5 0–0–0? (better 7...e5!?=) 8.Be2 (8.a5 ba5 9.Bc3 cb5 10.cb5 Nb6+–) 8...c5 (8...Ne5 9.0–0+–) 9.0–0 Ngf6 (9...e5 10.a5+–) 10.d4 (10.Ng5 Re8+–) 10...h5? (10...cd4 11.ed4 e6 12.a5+–) 11.d5 (11.Ng5 Re8+–) 11...Ng4? (11...e6 12.de6 fe6 13.a5+–) 12.h3 (12.Ng5 Nh6 13.Bh5 Ne5 14.Be5 de5 15.Bf7 e4 16.Be6 Kb8+–) 12...Nde5? (better 12...Nge5+–) 13.hg4 hg4 14.Nh2 (14.Ne5 de5 15.Bg4 e6+–) 14...g3 (14...e6 15.Ng4 Qe7 16.f4 (16.Ne5 Qh4 17.f4 Qh2 18.Kf2 Qh4 19.g3 Qh2 20.Ke1 de5+–; 16.Be5?! de5 17.a5 Qh4+–) 16...Ng4 17.Bg4+–) 15.fg3 e6 16.e4 Ng6 (16...Re8 17.a5+–) 17.Bc3 (17.Bh5 ed5 18.cd5 Ne5+–) 17...e5 (17...Qe7 18.Qd3+–) 18.a5 Be7 (18...Re8+–) 19.ab6 ab6 20.Qa4 (better 20.Bg4 Rd7 21.Rf7+–) 20...Kd7 21.Nd2 (21.Rf7 Rh7+–) 21...Bg5 (21...Ke8 22.Qd1+–) 22.Ndf3 (better 22.Rf7 Ne7 23.Ng4+– (23.Rg7?! Be3 24.Kf1 Rdf8 25.Ndf3 Rh2+–)) 22...Be3 23.Kh1 Ke8 24.Qb3 Qe7 (24...Bd4 25.Ng5 Rd7 26.Bg4+–) 25.Be5! Ne5 (25...Qe5 26.Ne5) 26.Qe3 Nf3 (26...f6 27.Ne5 de5 28.Ra7+–) 27.gf3 Qe5 (27...Bc8 28.Ra8+–) 28.f4 Qd4 (28...Qe7 29.Kg2+–) 29.Qd4 cd4 30.Rfd1 f6 31.Rd4 g5 32.Kg2 gf4 33.gf4 Kd7 (33...Bc8 34.Nf3+–) 34.Ra7 Kc8 35.Rd1 Rdg8 (35...Rde8 36.Bf3+–) 36.Ng4 Rh4 37.Kg3 Rgh8 (37...Rh7 38.Rda1 Rgg7 39.f5+–) 38.Bf3 (better 38.Nf6!? Rh3 39.Kg4 Re3+–) 38...Rh3 39.Kg2 Kb8 40.Rda1 Kc7 (40...R3h4 41.Kg3 Rh3 42.Kf2+–) 41.Rb7 (better 41.Nf6 R3h4 42.e5 Rf4 43.ed6 Kd6 44.Rb7 Rf6 45.Rb6 Ke5 46.Re1 Kf5 47.Rf6 Kf6+–) 41...Kb7 42.Ra6 (better 42.Nf6 Rh2 43.Kg3 R2h3 44.Kf2 Rh2 45.Bg2+–) 42...Ra8 (42...R3h4 43.c5! bc5 44.Rd6+–) 43.Nf6 (better 43.Kh3 Rf8 44.f5 Rf7+–) 43...Ra6 (43...Rh6 44.Ra8 Rf6+–) 44.ba6 Ka6 45.Ng4 (better 45.Kh3 Kb7 46.e5 b5+–) 45...b5 (45...Rh8+–) 46.Kh3 b4 47.Bd1 b3 (47...b3 48.Bb3 Kb6+–). RichardSommer (2095) – pilotSS20 (2020), lichess.org, 2020.

4.Nf3 a5 5.b5 c5 6.g3 Bf3 7.ef3 d5 8.Bg2 Ra7 9.0–0 d4 10.f4 e6 11.c3 Rd7 12.cd4 cd4 13.Na3 Ba3 14.Ra3 Ne7 15.Rd3 Nf5 16.g4 Nh6 17.h3 f6 (17...0–0 18.Qa1+/–) 18.Qc2 (18.Qb3 e5+–) 18...Nf7 19.Bc6 Nc6 20.Qc6 0–0 21.Qe6 Kh8? (better is 21...Re8!? 22.Qc6 Ree7+=) 22.Re1+– Nh6 23.Ba3 Rg8 24.Be7 Qc8 25.Re4?? Rc7?? 26.Qb6?? Rc1 27.Kg2 Qc2 28.Qd4 Qd1 29.Ba3?? Qh1 30.Kg3 Rg1 31.Kh4 f5 32.Ree3 Rg4 33.Kh5 Nf7 34.Bb2?? Rf8 35.Rg3+– Rg3 36.Rg3 (36.Rg3 Rg8 37.Qc3 Qd1 38.Kh4+–) 1–0. wk1234 – kakajer, kurnik, 2012.

4.Nf3 Na6 5.b5 cb5 6.ab5 Nc7 7.c4 Bf3 8.gf3 f6 9.Bg2 g6 10.f4 Rb8 (better is 10...d5!?+/–) 11.Ra7+– Bg7 12.e3 Ne6 13.d4 Nh6 14.d5 Nc5 15.0–0 0–0 16.d6 ed6 17.Qd6 Nf5 18.Qd5 Kh8 19.e4 Nh4 20.e5 (20.Bd4!? Ng2 21.Kg2+–) 20...Ng2 21.Kg2 fe5 22.fe5 Qg5 23.Kh1 Qf4 24.Bc1 Qe4 25.Qe4 Ne4 26.Rd7 Be5 27.Nd2 Nd2 28.Bd2 Bg7 29.Be3 Rbd8? (better is 29...Kg8+–) 30.Rd8 Rd8 31.Rc1 Bb2? 32.Rc2 Bd4 33.Rd2 Bf6 34.Rc2 h5?? 35.Bb6+– Bh4 36.Bd8 Bd8 37.c5 Kg7 38.c6 Kf6 39.c7 Ke7 1–0. wk1234 – badallaj1, kurnik, 2012.

4.Nf3 f6 5.g3 e6 6.b5 Ne7 7.Bg2 cb5 8.ab5 a6 9.Nc3 ab5 10.Ra8 Ba8 11.Nb5 Bf3?? (better is 11...Nf5+=) 12.Nd6# (12.Bf3?! d5+/–; 12.ef3?! Nf5+=) 1–0. wk1234 – zabawny, kurnik, 2012.

4.g3 c5 5.Nf3 cb4 6.Bg2 a5 7.0–0 Nf6 8.c3 bc3 9.Nc3 g6 10.Nb5 Bg7 11.Nfd4 0–0?? (better is 11...Bg2 12.Kg2 Nc6+=) 12.Bb7+– Nc6 13.Ba8 Qa8 14.Nc6 dc6 15.Nd4 Nd5 16.Qb1 c5 17.Nf3 Nb4 18.Bg7 Kg7 19.Qb2 Kg8 20.d3 e6 21.Ne5 Qd5 22.e4 Qd6 23.Rfd1 Rd8 24.Nc4 Qc7 25.Qe2 Qc6 26.f4 h5 27.Ne5 Qb7 28.Rac1 Qa6 29.Nc4 Qc8 30.Nb6 Qc6 31.Nc4 Qa4 32.Ne5 Qb5 33.g4 hg4 34.Qg4 Nd3 35.Nd3 Rd3 36.Rd3 Qd3 37.Qg2?? Qe3–+ 38.Kh1 Qc1 39.Qg1 Qg1 40.Kg1 a4 41.Kf2 a3 42.Ke2 a2 43.Kd3 a1Q 44.Kc4 Qd4 45.Kb5 Qe4 46.Kc5 Qf4 (46...Qf4 47.Kc6 Qh2–+) 0–1. wk1234 – lech7744, kurnik, 2012.

4.g3 d6 5.Bg2 Nd7 6.b5 d5 7.bc6 Bc6 8.Nc3 e6 9.Qb1 Ngf6 10.Nf3 g6 11.Nd4 Bb7 12.Ba3 Ba3 13.Ra3 0–0 14.Ncb5 Nc5 15.Nb3 Nb3 16.Qb3 Rb8 (better is 16...Ne4!?=) 17.Na7+/– Ne4 18.Be4 de4 19.0–0 (19.Qe3 Qf6+/–) 19...Bd5 (better is 19...Qd2 20.e3 Qa5+=) 20.c4+/– Bc6?? (better is 20...Ba8 21.Rd1 e5+/–) 21.Nb5 (better is 21.Nc6 Qd2 22.Ra2+–) 21...e3?? (21...Qd2 22.Rd1 Qa5= (22...Qe2? 23.Nd4 Ba4 24.Qa4+–)) 22.de3 Qg5 23.Nd4 Bb7 24.f3 e5 25.f4 ef4 26.ef4 Qh5 27.Ra2 Qh3 28.Nf3 Bf3 29.Rf3 Rfd8 30.Rd3 Re8 31.Qc3 Qf5 32.Qd2 Qc5 33.Rd4 Rbd8? 34.e3+/– (34.e3 Rd4 35.Qd4+/– (35.ed4?! Qc4 36.Rb2 Qa4+=)) 1–0. wk1234 – artus48, kurnik, 2012.

4.g3 h5 5.Bg2 h4 6.Nc3 e5 7.b5 Bd6 (7...d5 8.a5 ba5 9.bc6 Bc6 10.e3+=) 8.Ne4 Bc7 9.Nf3 (9.c4 d5 10.cd5 cd5+=) 9...hg3 (9...h3 10.Bf1+=) 10.hg3 (better is 10.Ng3 Qe7 11.c4=) 10...d5?? (better is 10...Rh1 11.Bh1 cb5+=) 11.Rh8+– de4 (11...Kf8 12.Neg5 e4 13.Nh7 Ke7+–) 12.Rg8 Kd7 (12...Ke7 13.Ba3 c5 14.Rd8 ef3 15.Bf3 Bf3 16.Rc8+–) 13.Rd8 Bd8 14.Ne5 (14.Ne5 Kc7 15.Nf7+–) 1–0. wk1234 – kakajer, kurnik, 2012.

3.a4 Nc6

4.Ra3 Nb4 5.Rg3 Nf6 6.Na3 e6 7.Qa1 Qe7 8.Nf3 0–0–0 9.e3 Ne4 10.Rg4 Qd6 11.d3 Nf6 12.Rd4 Qc5 13.Rc4 Qa5 14.Nb5 Nc2 15.Ke2 Na1 16.Nc7 Kb8 17.Ba1 Rc8 18.Bf6 gf6 19.Nb5 Rc4 20.dc4 Qa4 21.Nd2 Bb4 22.Kd3 Bd2 23.Kd2 Rc8 24.Bd3 Qa2 25.Kc3 d5 26.Rc1 dc4 27.Bc2 Qa1 28.Kd2 Rd8 29.Nd4 Qa5 30.Ke2 Ba6 31.Rd1 c3 32.Ke1 e5 33.Nc6 Kb7 34.Na5 ba5 35.Rd8 Kb6 36.Rd6 Kb5 37.Bd3 Kb4 38.Ra6 c2 0–1. xtom – pawlikua, kurnik, 2012.

4.a5 Nb4–/+ 5.ab6 cb6 6.c3 Nc6 7.e3 e6 8.Ba6 (8.Nf3 e5–/+) 8...Qc8 (8...Ba6!? 9.Ra6 Qg5–+) 9.Bb7+= Qb7 10.Nf3 Be7 11.0–0 Nf6 12.Ba3 Ba3 13.Ra3 0–0 14.d4 a5 15.Nbd2 b5 16.Nb3 Nd5 Black intends b4 17.Nc5 Qc7 18.Ng5 h6 19.Nge4 d6 20.Nd3 b4 21.cb4 Ndb4 22.Nb4 Nb4 23.Rc3 Qd7 24.Qb3 Rfb8 25.Rfc1? Nd3! 26.Qa3 Nc1 27.Qc1 Rc8 28.Rc8 Rc8 29.Qb1 a4 30.h3 Ra8 31.Qb4 d5 32.Nc5 Qa7 33.Qa3 Qa5 34.Nb7 Qe1 35.Kh2 Qf2 36.Nc5 Qc2 37.Nd7 Qb3 38.Qe7 a3 39.Ne5 Rf8 40.Nd7 Ra8 41.Ne5 Rf8 42.Nd7= Ra8 ½–½. aleksandras19 – rewersev6, kurnik, 2012.

4.b5 Nb4 5.c3 Nd5 6.Nf3 Ndf6 7.g3 Bf3 8.ef3 e5 9.Bg2 c6 10.bc6 dc6 11.f4 Qc7 12.0–0 (better is 12.Qe2+=) 12...Rc8?? (better is 12...ef4 13.Re1 Kd8=) 13.fe5+– Nd5 14.Re1 Be7 15.c4 Nb4 16.Qb3 c5 17.d4 f6?? 18.ef6 Nf6 19.d5 0–0 20.Nc3 Nd3?? 21.Re3 Nb4 22.Ba3 a5 23.Bb4 ab4 24.Nb5 Qb7?? 25.d6 Qd7 26.de7 Qe7 27.Re7 Rfe8 28.Re8 (28.Re8 Re8 29.Bd5 Kf8 30.Nc7+–) 1–0. wk1234 – brev, kurnik, 2012.

4.b5 Nb4 5.Nf3 e6 6.g3 Bf3 7.ef3 Nf6 8.c4 Be7 9.Qb3 0–0 10.Bc3 a5 11.ba6 Nc6 12.c5 (12.Be2 Ra6 13.c5 Ra7 14.cb6 cb6+=) 12...Bc5 13.Bg2 (better is 13.a5!?–/+) 13...Ra6 14.0–0 Re8 15.Qc4 Ra7 16.d4 Bf8 17.f4 Na5 18.Qb5 c6 19.Qb2 Nc4 20.Qb3 d5 21.Nd2 Na5 22.Rfb1?? (better is 22.Qc2–+) 22...Nb3 23.Rb3 h6 24.Nf3 Ne4 25.Ne5 Nc3 26.Rc3 c5 27.Nc6 Qc7 28.Na7 Qa7 29.dc5 Bc5 30.Bf1 Qa5 31.Rcc1 Qd2 32.Kh1 Qf2 33.Rc5 bc5 34.a5 Ra8 35.a6 c4 36.a7 c3 37.Bb5 c2 38.Bc6 Qf3 39.Kg1 Qe3 40.Kg2 c1Q 41.Rc1 Qd2 42.Kh3 Qc1 43.Ba8 Qc5 44.Bd5 Qa7 45.Be6 fe6 46.Kg4 Qf7 47.h4 Qf5 48.Kf3 h5 49.Ke3 Qg4 50.Kf2 g6 51.Kg2 Qe2 52.Kg1 Kg7 53.Kh1 Qf2 54.g4 hg4 55.h5 gh5 56.f5 Qf5 57.Kg2 Qf3 58.Kg1 h4 59.Kh2 h3 60.Kg1 Qg2# 0–1. lietuvis11111 – ciprianpaul, kurnik, 2012.

4.b5 Na5

5.e3 c6 6.Ne2 e6 7.Nf4 Nf6 8.c4 cb5 (8...Rc8 9.Be2=) 9.ab5 Rc8 10.Na3 Bb4 (10...d5 11.cd5 Nd5 12.Nh5=) 11.Be2 d5 12.cd5 ed5 (12...Bd5 13.Nd5 Qd5 14.Bf3=) 13.0–0+= 0–0 14.Nc2 (14.Qa4 Bd6+= (14...Bd2? 15.Nb1+–)) 14...Bd6= 15.Nd3 Qc7 16.f4?? (better 16.Bf6 gf6 17.Nd4 Bh2 18.Kh1+=) 16...Qc2–+ 17.Qc2 (17.Bc3 Rc3 18.dc3 Qd1 19.Rfd1 Ne4–+) 17...Rc2 18.Bf6 (18.Bc3 Ne4 19.Ba5 ba5–+) 18...gf6 (18...Rd2 19.Bg7 Kg7 20.Rf2–+) 19.Rad1 (19.Rfd1 Ra8 20.Ne1 Rb2–+) 19...Nc4 20.Ne1 (20.Nf2 Ne3! 21.de3 Re2–+) 20...Rd2 21.Rd2 Nd2 22.Rf2 Ne4 23.Rf3 (23.Rf1 Rc8–+) 23...Kh8 (better 23...Rc8 24.Rf1–+) 24.Rg3 (24.Nc2 Ra8–+) 24...Ng3 25.hg3 Rg8 (25...Ra8 26.Nc2–+) 26.Kh2 (26.Kf2 Ra8–+) 26...Bc8 (26...Bc5 27.Nc2–+) 27.Nf3 (27.Nc2 Bd7–+) 27...Rg6 (better 27...Re8 28.Nd4–+) 28.Nd4 Bc5 29.Nc6 (29.Bf3–+) 29...Be3 (29...Rh6 30.Bh5 Rh5 31.Kg1 Be3 32.Kf1 Bg4 33.Na7 Rh1) 30.Ne7 (30.g4 Bg4 31.Bg4 Rg4 32.g3–+) 30…Rh6 (30...Rh6 31.Bh5 Rh5) 0–1. Akrapovik – Freakazoyt, lichess.org, 2019.

5.Nf3 d5 6.g3 Qd6 7.Bg2 0–0–0 8.0–0 Nf6?? (8...Nc4 9.Bc3 e5 10.d3+=) 9.Bh3?? (better is 9.Ng5+–) 9...Kb8 (better is 9...e6!?=) 10.Be5+/– Qc5 11.d4 Qc4 12.Nfd2 Qb4= 13.c3 Qb2 14.Ra3 Nc4?? 15.Nc4+= dc4 16.Bf6?? gf6?? 17.Qc1 Qc1 18.Rc1= e6 19.Ra2 e5 20.de5 fe5 21.Nd2 Rg8 22.Nc4 Bc5? 23.Ne5+– Rge8 24.Nc6 Bc6+/– 25.bc6 Rd6 26.Bg2 a5 27.e4 Ka7 28.Re2 Rc6 29.e5 Rce6 30.Kh1 Re5 31.Re5 Re5 32.f4 Re2 33.Bd5 f6 34.c4 Be3 35.Rc3 Bd2 36.Rd3 Re1 37.Kg2 Bb4 38.Kf3 Rh1 39.h4 Rf1 40.Kg4 Rg1 41.Kf5 Be1 42.Kf6 Bg3 43.f5 Bh4 44.Ke6 Rf1 45.Bf3 h6 46.f6+– Bf6 47.Kf6 h5 48.Kg5 Rg1 49.Kh5 Ra1 50.Bc6 Ka6 51.Kg5 Rc1 52.Bb5 Ka7 53.Rd7 Kb7 54.Kf5 Rf1 55.Ke4 Re1 56.Kd5 Rd1 57.Ke6 Re1 58.Kf5 Rf1 59.Ke4 Re1 60.Kf3 Rf1 61.Ke2 (61.Ke2 Rh1 62.Rd8+–) 1–0. wk1234 – zabawny, kurnik, 2012.

5.Nf3 e6 6.d3 d5 7.g3 Nf6 8.Bg2 Bb4 9.c3 Bd6 10.0–0 0–0 11.Nd4 c5 12.Nc2 c4 13.d4 Nb3 14.Ra2 a6 15.Ba3 ab5 16.Bd6 (better is 16.ab5!? Re8 17.Ne3–/+) 16...Qd6–+ 17.Nb4 ba4 18.Nd2 b5 19.Qb1 Rfe8 20.Rb2 a3 21.Ra2 Ra7?? (better is 21...Nd2 22.Rd2 e5–+) 22.Nb3+= cb3 23.Qb3 Rea8 24.f3 e5 25.de5 Qe5 26.f4? Qe2?? 27.Nd5 Qc4?? 28.Qc4+= bc4 29.Ne7?? Kf8–+ 30.Bb7 Rb7 31.Nc6 Rb2 32.Rfa1 Rb3 33.Rc2? Nd5 34.Nd4 Rc3 35.Rc3 Nc3 36.Kf2 a2 37.Ke3 Rb8 38.Rf1 Rb1 39.Rb1 ab1Q 40.Nc6 Qb6 41.Kd2 Qc6 42.Kc3–+ Qd5 43.h4 Qd3 44.Kb4 c3 (44...c3 45.f5 c2 46.f6 c1Q 47.fg7 Kg7 48.Ka5 Qc5 49.Ka4 Qcb5#) 0–1. wk1234 – rafmat1980, kurnik, 2012.

5.Nf3 e6 6.g3 f6 7.Bg2 Qe7 8.Ba3 d6 9.0–0 0–0–0 10.Nc3 Nc4 11.Bc1 e5 12.d4 ed4 13.Nd4 Bg2 14.Kg2 Nh6? (better is 14...Na5+/–) 15.Nc6+– Qe6 16.Na7 Kb7 17.Nc6 Re8 18.e3 Nf5 19.Qf3 g5?? (19...Kc8+–) 20.Nd4 Kb8 21.Ne6 Re6 22.Qf5 Re8 23.Qf6 Be7 24.Qd4 Ne5 25.Nd5 Bd8 26.Bb2 g4 27.Nb6! Nf3 28.Qd5 cb6 29.Bh8 Rh8 30.Qd6 Bc7 31.Qd3 Rd8 32.Qh7 Rd2 33.Rad1 Rc2 34.Qc2 Bg3 35.hg3 Nd2 (35...Ne1 36.Rfe1 Kb7 37.Rd8 Ka7 38.Qc7#) 1–0. wk1234 – vllahia, kurnik, 2012.

5.Nf3 Bf3 6.gf3 Nb7 7.Bg2 d5 8.f4 Nc5 9.c4 e6 10.Nc3 Nf6 11.cd5 Nd5 (11...ed5!? 12.0–0 a6+=) 12.d4+/– Nb7 (better is 12...Nf4 13.Ba8 Qa8+/–) 13.e4?? (better is 13.Nd5!? ed5 14.Qb3+–) 13...Nc3 (better is 13...Nf4 14.Bf3 e5+=) 14.Bc3+/– Rb8 15.0–0 Nd6? 16.e5+– Nc4? 17.d5 Bc5 18.de6 Qd1 19.Rfd1 fe6 20.Bh3 Kf7?? 21.Rd7+– Kg6 22.Be6 Rhe8 23.Bc4 Re7 24.Re7 Be7 25.Rd1 Rd8 26.Bd3 Kh6 27.Rd2 Bh4 28.Kg2 Rf8 29.e6 Rf4 30.Be5 Rg4 31.Kh3 Ra4 32.Bc7 Bg5 33.Re2 Rh4 34.Kg2 Rd4 35.Bf5 Rd5 36.Bh3 Rb5 37.f4 Bf6 38.Be5 Be7 39.f5 Rd5 40.Bg3 a5 41.Kf2 b5 42.Bg2 Rd1?? 43.Re5 Rb1 44.Bc6 a4 45.Bb5 a3 46.Bc4 Rc1 47.Bd5 Rc5 48.Bf4 g5 49.Be3 Ra5? 50.f6! Bf6 51.Rf5 a2?? 52.Rf6 Kg7 53.Rf7 Kg8 54.Ba2! Ra2 55.Kg3 Ra6 56.Rf6 Kg7 57.Bd4 (57.Bd4 Ra4 58.e7 Rd4 59.Re6+–) 1–0. wk1234 – kakajer, kurnik, 2012.

5.Nf3 Nf6 6.g3 g6 7.Bg2 Bg7 8.0–0 d6 9.Bc3 e5 10.Nh4 Bg2 11.Ng2 Ne4 12.e3 0–0 13.Ba5 ba5 14.Qf3 d5 15.d3 Nc5 16.Nc3? (better is 16.Ra3+=) 16...e4–+ 17.de4 Bc3 18.Rad1 de4 19.Rd8 (19.Qe2 Qf6 20.Qc4 Bb4–+) 19...ef3 20.Rf8 Rf8 21.Nf4 Na4 22.Nd5 Rc8 23.Ne7= Kg7 24.Nc8 Nb6 25.Na7 a4 26.Nc6 a3 27.Na5?? Ba5–+ 28.Ra1 Bb4 29.Ra2 Nc4 30.c3 Bc5 31.Kf1 Nb2 32.Ke1 Nd3 33.Kd2 Nf2 34.c4 Ne4 35.Ke1 h5 36.Kf1 Kf6 37.Ke1 Ke5 38.Kf1 Nc3 39.Rc2 Bb4 40.Kf2 Kd6 41.Kf3 Kc5 42.e4 Kc4 43.Ke3 Kb5 44.Kd3 a2 45.Rc1 Na4 46.Ra1 Bc3 47.Ra2 Bb4 48.e5? Nc5 49.Kd4 Ne6 50.Kd5 c6 51.Ke4 c5 52.Rf2 Ng5?? 53.Kf4?? c4 54.Kg5+– c3 55.Kf6 Bc5 56.Rc2 Bd4 57.Kf7 (57.Kf7 Be5 58.Kg6+–) 1–0. wk1234 – bingo01, kurnik, 2012.

4.b5 Nb8

5.a5 ba5 6.Ra5 c6 7.bc6 Nc6 8.Ra1=.

5.a5 c6 6.ab6 (6.a6 Bc8+=) 6...ab6 7.bc6 dc6 8.Nc3 Ra1 9.Qa1 e5 10.Qa7 Qc7 11.g3 f6 12.Bg2 Ne7 13.Nf3? (better is 13.Nh3=) 13...g6?? (better is 13...Na6 14.Bh3 f5 15.Bf5 Nf5–+) 14.Ne4+– Qd7?? (better is 14...Bg7 15.Qb7! Qb7 16.Nd6 Kd8 17.Nb7 Kc7+/–) 15.Nf6 Kf7 16.Nd7 Nd7 17.Qb7 Bg7 18.0–0 Nc5 19.Qb6 Ne4 20.Qb3 Nd5 21.Be5 Be5 22.Ne5 Kg7 23.Qb7 Kh6 24.c4 Ndf6 25.Be4 Ne4 26.Ng4 Kg5 27.f3 Nd2 28.h4 Kh5 29.Rd1 Nc4 30.Qc6 Nb2 31.Rd5 g5 32.Rg5# 1–0. africa101 – kakajer, kurnik, 2012.

5.Nf3 a6 6.Nc3 e6 7.g3 Bb4 8.Qb1 Nf6 9.Bg2 Qe7 10.0–0 h5 11.Na2 ab5? (11...Ba5 12.Bc3=) 12.Nb4 Qb4 13.Bf6 Qb1 14.Rfb1 gf6 15.Rb5 (15.ab5 Ke7+/–) 15...h4 16.Nh4 Bg2 17.Ng2 Nc6 18.e3 Ke7 19.d4 Ra6 20.c4 White prepares d5 20...Rha8 21.d5 Ne5 22.Rb4 Nd3 23.Rb3 Nc5 Attacks the isolani on a4 24.Rb4 Ra4 25.Rba4 Ra4 26.Ra4 Na4 27.Ne1 ed5 28.cd5 Nc3 29.Kg2 b5 30.Nd3 Nd5 31.e4 Nb6 32.f3 d6 33.Kf2 c5 34.Ke3 Nd7 35.Kd2 Ne5–+ 36.Ne5 fe5 37.Kd3 Ke6 38.h4 f6 39.g4 d5 Black plans c4 40.ed5 Kd5 41.h5 Ke6 42.Ke4 c4 43.Ke3 b4 44.Kd2 f5 45.g5?? Kf7–+ 46.Kc2 e4 47.fe4 fe4 48.Kd2 b3 49.Kc3 e3 50.Kc4 e2 51.Kb3 e1Q 52.Kc4 Qh4 53.Kd3 Qg5 54.Ke4 Qh5 (54...Qh5 55.Ke3 Qe5 56.Kd2 Qd4 57.Ke2 Ke6 58.Kf3 Kf5 59.Kg3 Qe3 60.Kg2 Ke4 61.Kf1 Qd2 62.Kg1 Kf3 63.Kf1 Qd1#) 0–1. wk1234 – bredh, kurnik, 2012.

5.Nf3 c6 6.Nc3 cb5 7.ab5 a6 8.g3 ab5 9.Ra8 Ba8 10.Nb5 Bc6 11.Nc3 Nf6 12.Bg2 g6 13.0–0 Bg7 14.Ne5 0–0 15.Bc6 Nc6 16.Nc6 dc6 17.Qb1 (17.d3 Qd7+=) 17...c5 (17...Qd2 18.Rd1 Qg5 19.Ba1–/+) 18.Nb5 (better is 18.d3!?=) 18...Qd2–/+ 19.Nc3 b5 20.Rd1 Qg5 21.Nb5 Ne4 22.Bg7 Kg7 23.Qb2 Qf6 24.Qf6 ef6 25.Rd5 Rb8 26.f3 (better is 26.c4!?+/–) 26...Rb5 27.fe4 Kf8 28.Kf2 Ke7 29.c4 Ke6?? (better is 29...Ra5=) 30.cb5+– f5 31.Rc5 fe4 32.Ke3 1–0. wk1234 – dany345, kurnik, 2012.

5.Nf3 Nf6 6.g3 g6 7.Bg2 Bg7 8.0–0 0–0 9.Nh4 Bg2 10.Ng2 c6 11.e3 cb5 12.Qf3 Nc6 13.ab5 Na5 14.Bd4 Nc4 15.d3 Nd6 16.c4 Re8 17.Nc3?? (better is 17.Be5+/–) 17...e5–/+ 18.Bb6 ab6 19.Ra8 Qa8 20.Qa8 Ra8 21.Ne2? (21.f3–+) 21...e4 22.de4 Nfe4 23.f3 Nd2 24.Rd1 Nf3 25.Kf2 Ne5 26.Rd6–/+ Nc4 27.Rd7 Ra5 28.Rb7 Rb5–/+ 29.Ngf4 Rb2 30.Kf3 b5 31.Rb5?? Rb5–+ 32.Nd4 Bd4 33.ed4 Kg7 34.Ke4 Nd2 35.Kd3 Nf3 36.h4 Rb4 37.d5 Ne5 38.Kc3 Re4 39.d6 Re3 40.Kd4 Re1 41.h5 g5 42.Ng2 Re2 43.Ne3 Nd7 44.Nd5 Rg2 45.Ne7 Nf6 46.Nf5 Kf8 47.Ke5 Nd7 48.Kd5 f6 49.Kc6 Ne5 50.Kd5 Rh2 51.Ke6 Rh5 52.Kf6 Nd7 53.Ke6 Nb6 54.g4 Rh4! 55.Ne3 Rh3 56.Nf5 Rh4 57.Ne3 h5 58.gh5 Rh5 59.d7 Nd7! 60.Kd7 Kg7 61.Nf5 Kf6 62.Ng3 Rh3 63.Ne4 Kf5 64.Nf2 Rf3 65.Nh1 Rd3 66.Kc6 g4 67.Kb5 g3 68.Kc4 Rf3 69.Kd4 g2 70.Ng3 Rg3 71.Kd5 g1Q (71...g1Q 72.Kc4 Qc1 73.Kb4 Qc2 74.Ka5 Rb3 75.Ka6 Qa2#) 0–1. wk1234 – dany345, kurnik, 2012.

3.a4 d6

4.Ra3 e5 5.b5 a6 6.Nc3 ab5 7.ab5 Ra3 8.Ba3 Nd7 9.Qa1 Qa8 10.e3?? Bg2–+ 11.Bg2 (11.Qa2 Bh1 12.Bc4 Nh6–+) 11...Qg2 12.Bd6 (12.Nce2 Qh1 13.Qc3 Qb7–+) 12...Bd6 13.f3 Qh1 14.Kf2 (14.Qa8 Ke7 15.Nd5 Ke6–+) 14...Qh2 15.Kf1 Ne7 (better is 15...f5 16.Qe1 Ngf6–+) 16.Qa8 Nc8! 17.Qc8 Ke7 18.Qh8 Nf6 (better is 18...Qd2 19.Ne4 Qc1 20.Kf2 Bc5 21.Nc5 Qc2 (21...Nc5?! 22.Qh7 g6 23.Qh4 Ke8 24.Qc4–/+; 21...bc5?! 22.Qh7 g6 23.Qh4 Nf6 24.c4–/+) 22.Kf1 Qc5 23.Qg7 Qe3 24.Qh7 Qc1 25.Kg2 Qb2 26.Kg3 Qb5–+) 19.Qg7+= e4 (19...Qd2? 20.Qf6 Kf6 21.Ne4 Ke6 22.Nd2+–) 20.f4 Qh5 21.Qg5 Qg5 22.fg5 Nh5 23.Ne4 f6 24.gf6 Nf6 25.Ng5 h6 26.N5f3 Ke6 27.d3 Kd5 28.e4 Kc5 29.c4?? Bf4? 30.Ne2+/– Bg5 31.e5 Ne8 32.e6?? c6 33.bc6 Kc6 34.Ned4 Kc5 35.Ke2 Kd6 36.Ng5 hg5 37.Kf3 Nc7 38.Kg4 Ne6 39.Ne6 Ke6 40.Kg5?? Ke5–+ 41.Kg4 Kd4 42.Kf3 Kd3 43.Kf2 Kc4 44.Ke2 Kc3 45.Kd1 Kb2 46.Kd2 b5 47.Kd1 b4 48.Kd2 b3 49.Kd1 Kb1 50.Kd2 b2 51.Kd1 Ka2 52.Kc2 b1Q 53.Kc3 Qb3 (53...Qb3 54.Kd2 Qf3 55.Kc2 Qe4 56.Kc1 Kb3 57.Kd2 Kb2 58.Kd1 Kc3 59.Kc1 Qc2; 53...Qe4 54.Kd2 Kb3 55.Kd1 Kc3 56.Kc1 Qc2) 0–1. xtom – ira102, kurnik, 2011.

4.Ra3 e5 5.b5 Nd7 6.f4 Ngf6 7.fe5 de5 8.Nf3 Ba3 9.Na3 0–0 10.Ne5? (10.Nc4–+) 10...Ne5 11.Be5 Qe7 12.Qa1 Ne8 13.Rg1 f6 14.Bc3 Nd6 15.e3 Ne4 16.Bd3 Nc3 17.Qc3 Rad8 18.Nc4 Kh8 19.h4 Bd5 20.h5 Qd7 21.h6 g6 22.g4 Qe6 23.g5 c6 24.Rf1 Kg8 25.bc6 (25.Rf6? Rf6 26.gf6 cb5–+) 25...Bc6 26.a5?? (better is 26.gf6 Rd5 27.Na3+/–) 26...b5–/+ 27.Nb2 f5?? (better is 27...a6–/+) 28.Qg7 1–0. xtom – 07janowski (1650), kurnik, 2011.

4.Ra3 e5 5.Nc3 f5 6.Qa1 Nf6 7.e3 Nbd7 8.b5 Be7 9.a5 0–0 10.a6 Bc8 11.h4 (11.Bc4 Kh8+=) 11...h6 (11...d5 12.Nf3 Ba3 13.Qa3–/+) 12.h5 (12.Bc4 Kh8=) 12...Nc5 13.Nf3 Be6 14.Nh4 Bf7 15.Be2 f4 16.e4 (better is 16.Ng6!? fe3 17.de3+=) 16...Nfe4 17.Ne4 Ne4 18.Nf5 Bf6 19.g3 fg3 20.fg3? (20.Ng3 Ng5 21.Rf1–+) 20...Be6 21.g4?? Bf5 22.gf5 Bg5 23.Rg1? Bd2 24.Kd1 Bg5 25.Bc4? d5 26.Bd3 Nf2 27.Ke2 Nd3 28.Rd3 e4 29.Rdg3 Qd7 30.Rg5 hg5 31.Rg5 Qb5 32.Ke1 Rf7 33.h6 Qa5 34.Qa5 ba5 35.Bg7 Kh7 36.Ke2 Rg8 37.f6 c6 38.Re5? Rgg7 39.hg7 Rf6–+ 40.Re7 Kg8 41.Ra7 Rf7?? 42.Rf7+– Kf7 43.a7 Kg7 44.a8Q Kf6 45.Qc6 Ke5 46.Qb5 Kd4 47.Qa5 Ke5 48.Qc3 Kf5 49.Qd4 Ke6 50.Ke3 Kd6 51.Kf4 Ke6 52.c3 Kd6 53.Qe5 Kc5+– 54.Qd4 Kd6 55.Kf5 Kc6 56.Ke6 e3 57.Qe3 d4 58.Qd4 (58.Qd4 Kc7 59.Qd7 Kb8 60.Kd5 Ka8 61.Kc6 Kb8 62.Qb7) 1–0. xtom (1620) – krakenisko (1660), kurnik, 2011.

4.a5 e5 5.ab6 ab6 6.Ra8 Ba8 7.e3 g6 8.Nf3 Bg7 9.Be2 Nf6 10.0–0 h6 11.d4 e4 12.Nfd2 d5 13.c4 0–0 14.c5 bc5 15.bc5 Nc6 16.Qa4 Qb8 17.Ba3 Qa7 18.Qa7 Na7 19.Nc3 c6 (19...Rb8 20.Ra1=) 20.Rb1 Rc8 21.Na4 Nd7 22.Nb6 Nb6 23.cb6 Nb5 24.Bb5 cb5 25.Rb5 Rb8 26.Bc5 Bc6 27.Ra5 Bf8 28.Ra7 Bc5 29.dc5 Kg7 30.Rc7 Bb5 31.h3 Kf6 32.Nb3 Ke6 33.Nd4 Kf6 34.Kh2 Ba6 35.Ra7 Bc8 36.Nc6 Rb7 37.Rb7 Bb7 38.Na5 Ba6 39.c6 Ke7 40.c7 Kd7 41.Kg3 f6 42.Kf4 h5 43.g4 h4 44.g5 f5 45.Ke5 Ke7 46.Kd5 Kd7 47.Ke5 Ke7 48.Kd5 Kd7 49.Kc5 Bd3 50.Nc4 Kc8 51.Ne5 Bf1 52.Ng6 Bh3 53.Nh4 Bg4 54.g6 Bh5 55.g7 Bg6 56.Ng6 (56.Ng6 f4 57.g8Q Kb7 58.c8Q#; 56.g8Q Kd7 57.c8Q Ke7 58.Qge6#) 1–0. aleksandras19 – slabeusz1950, kurnik, 2011.

4.b5 a5 5.Nf3 e6 6.g3 d5 7.Bg2 Bc5?? (better is 7...Nf6=) 8.Bg7+– Be7 9.Bh8 Bf6 10.Bf6 Qf6 11.c3 Nd7 12.0–0 0–0–0 13.Qc2 Ne7 14.Qh7 Ng6 15.Nh4 Rh8 16.Qh8! Qh8 17.Nf3 Nde5 18.Ne5 Ne5 19.f4 Ng4 20.h3 Nh6 21.d4 Nf5 22.Kh2 Ne3 23.Rf3 Ng2 24.Kg2 Qh7 25.Nd2 Qc2+= 26.Rd3 e5? 27.fe5+– c5 28.Rf1 cd4? 29.cd4 Qa4 30.Rf7 Qb5 31.e6 Bc6 32.e7 Kd7 33.h4 Ke8 34.Rh7 Qa4 35.Rf3 Qd4 36.Rf8 Kd7 37.e8Q Kd6 38.Qe7# 1–0. wk1234 – golota4, kurnik, 2012.

4.b5 c5 5.Nf3 Nd7 6.g3 Ngf6 7.Bg2 e6 8.0–0 Be7 9.Ng5 0–0?? (better is 9...Bg2 10.Kg2 0–0+=) 10.Bb7+– Rb8 11.Bg2 e5 12.Nf3 Ng4 13.h3 Ngf6 14.d3 Nh5 15.Qd2 Ng3 (15...a6+–) 16.fg3 Nf6 17.Nc3 Nh5 18.g4 Nf4 19.Qe3 Bh4 20.Ne4 h5 21.Qd2 hg4 22.Nh4 Nh3 23.Bh3 Qh4 24.Bg2 g3 25.Rf3 Qh2 26.Kf1 f5 27.Ng3 e4 28.de4 fe4 29.Ne4 Rf3 30.ef3 Rf8 31.Qd5 Kh8 32.Kf2 Qh4 33.Ke3 Qh6 34.Kd3 Qf4 35.Rh1 (35.Rh1 Qh4 36.Rh4#) 1–0. wk1234 – gogudinpiTESTI, kurnik, 2012.

4.b5 e6 5.Nf3 Nd7 6.g3 g6?? (better is 6...Ne5=) 7.Bh8+– f6 8.g4 (8.Bh3 Qe7 9.0–0 Nh6+–) 8...Bh6 (8...Ne5 9.g5!+–) 9.g5! fg5 (9...fg5 10.Rg1 Decoy; 9...Bg5 10.Ng5 Combination) 10.Bc3 (10.Rg1 Bf3 11.ef3 Ngf6+–) 10...Qe7?? (better is 10...g4+/–) 11.Rg1+– Ngf6 12.Ng5 Bg5 13.Rg5 Ne4 14.Rg1 Qf7 15.f3 Nc3 16.Nc3 Ne5 17.Bg2 0–0–0 18.d4 Nc4 19.Qd3 d5 20.e4 Nb2 21.Qe2 Nc4 22.Bh3 Kb8 23.0–0–0 Qe7? 24.ed5 Qa3 25.Kb1 Qb2# 0–1. wk1234 – deni2010, kurnik, 2011.

4.b5 Nf6 5.e3 g6 6.Bf6 ef6 7.Nc3 Bg7 8.Rb1 f5 9.Nce2 0–0 10.c4 a6 11.d4 ab5 12.cb5 (worse is 12.Rb5 Ba6–/+) 12...Nd7 13.Nc3 (13.Rc1 Re8=) 13...Nf6 14.h3 Nd5 15.Nd5 Bd5 16.Ne2 Qe7 17.Nc3 (17.Rc1 Be4=) 17...Qe6 (better is 17...Bb7!? 18.Ne2 Bh6+=) 18.Nd5+= Qd5 19.Rc1 (19.Be2 Qe6 20.Bf3 Ra7+=) 19...Rac8 (19...f4 20.Qf3 Qf3 21.gf3+=) 20.Rg1 (20.Be2 Qg2 21.Bf3 Qg5=) 20...Rfe8 21.Bc4 Qe4 22.Bd3 Qd5 23.Rc6 Qd4 24.Qc2 Qb4 25.Ke2+= Re7 26.Rb1 Qh4 27.Rb3 Qa4 28.Rd6 f4 29.Rc6 fe3 30.f3?? Qh4 31.Be4 Qf2 32.Kd3 Rd7 33.Kc4 Qc2 34.Bc2–+ Re7 35.Be4 f5?? 36.Bd5–/+ Kh8 37.Re6 Re6 38.Be6 Re8 39.Re3 Bf8 40.Re2 Kg7 41.Kd3 Rd8 42.Kc4 Re8 43.Kd5 Kf6–/+ 44.g3 Bd6 45.g4 h6 46.gf5 gf5 47.Re1 h5 0–1. aleksandras19 – slabeusz1950, kurnik, 2011.

4.b5 Nf6 5.f3 e5 6.e4 Be7 7.d4 Nbd7 8.d5 0–0 9.Bd3 a6 10.ba6 (10.Ne2 Nc5=) 10...Ba6+= 11.Ba6 Ra6 12.Qd3 Ra8 (12...Nc5 13.Qc4–/+) 13.Nd2 (13.Ne2 Nc5 14.Qc4 Qd7+=) 13...Nh5 (13...Nc5 14.Qc4–/+) 14.Ne2+= Bg5 (better is 14...Nc5 15.Qb5 f5 16.ef5 Nf6= (worse is 16...Rf5 17.g4 Bh4 18.Kd1+/–)) 15.0–0?? (15.Nb3 Nf4 16.Nf4 Bf4=) 15...Bd2?? (better is 15...Nc5 16.Qc3 Na4 (16...Ra4?! 17.Nb3+=) 17.Ra4 Ra4–+) 16.Qd2= h6 17.g4 Nhf6+= 18.Rf2 Nh7 19.Rg2 Qh4 20.Ng3 Ng5 21.Qe2? g6 22.Bc1–/+ Nh3 23.Kh1 Nf4 24.Bf4 ef4 25.Nf1 Ne5 26.Nd2 h5 27.gh5 Qh5 28.Qf2 Kg7 29.Rag1 Rh8 30.Rg5 Qh3 31.Qg2 Qh6 32.Rg4? Ra4–+ 33.Rf4 Raa8 34.Qg3–/+ Ra2 35.Rc1 Raa8 36.Nf1 b5 37.Rb1= Rab8 38.Ne3 Qh3 39.Qh3 Rh3 40.Ng4 Nf3 41.Kg2+= Nd2 42.Kh3?? Nb1–/+ 43.Ne3 b4 44.Rf2? Nc3–+ 45.Nc4 Ne4 46.Re2 Ng5 47.Kg4 f6 48.h4 Nf7 49.Rf2? b3 50.cb3 Rb3 51.Rc2 Rb4 52.Kf3?? Ne5 53.Ne5–/+ de5 54.Rc7 Kh6 55.Rc8 g5 56.Rh8? Kg7–+ 57.Rh5? gh4 58.Rf5 Rd4 59.d6 Rd6 60.Kg4 Rd4 (60...Rd4 61.Kh3 Rf4–+) 0–1. dtpwaldi – ftt1000, kurnik, 2011.

4.Nc3 e5 5.e4 g6 6.Bc4 Bg7 7.Nf3 Ne7 8.Ng5 d5 9.Qf3 0–0 10.ed5 Bd5 11.Nd5 Nd5 12.Bd5 c6 13.Nf7 Qd5 14.Qd5 cd5 15.Ne5 Be5 16.Be5 Re8 17.d4 Nc6 18.c3 Ne5 19.de5 Re5 20.Kd2 Rae8 21.Rae1 Re1 22.Re1 Re1 23.Ke1 Kf7 24.Kd2 Ke6 25.Kd3 Ke5 26.g3 h6 27.f4 Kf5 28.Kd4 Ke6 29.c4 dc4 30.Kc4 Kd6 31.Kb5 h5 32.Ka6 Kc6 33.Ka7 b5 34.a5 Kd5 35.Kb6 Kc4 36.a6 Kb4 37.a7 1–0. arti000 – luzerrr, kurnik, 2012.

4.c4 a5 5.b5 Nd7 6.Nf3 Ngf6 7.g3 g6 (7...Ne5!?+=) 8.Bg2= Bg7 9.0–0 0–0 10.Nc3 Nc5 11.d4 Nce4 12.Ne4 Be4 13.e3 Nd7 14.Qb3 e5 15.Rac1 Rc8 16.Ba3 (16.de5!? Nc5 17.Qa2+=) 16...Bf3+= 17.Bf3 ed4 18.e4 Nc5 19.Bc5 dc5 20.Rfe1 Qd6 21.Qd3 Rce8 22.Re2 Bh6 23.Rce1 Re5 24.Bg2 g5 25.Qf3 f5 26.ef5= Rff5 27.Qh5 Kg7 28.h4 gh4+= 29.Qg4 Rg5 30.Qh4 Re2 31.Re2 Re5 32.Qg4= Rg5 33.Qf3 Qf8 34.Qc6 Qd6?? 35.Qe8+– Qf8 36.Qd7 Kh8 37.Re8 Rg8 38.Rf8 Rf8 39.Qc7 d3 40.Qe5 Bg7 41.Qd5 Bd4 42.Qe4 d2 43.Qd3 Rf2 44.Bf3?? Rf3 45.Kg2 Rd3 (45...Rd3 46.Kh2 d1Q 47.Kh3 Qh5 48.Kg2 Rd2 49.Kf1 Qe2#) 0–1. kannisogoet – shemy, kurnik, 2012.

4.c4 e5 5.Na3 Nf6 6.e3 Nbd7 7.Nf3 Be7 8.Be2 0–0 9.0–0 h6 10.d4 e4 11.Nd2 c6 12.Nc2 d5 13.c5 bc5 14.dc5 Qc7 15.Nd4 Ne5 16.f4 ef3 17.N2f3 Nf3 18.Nf3 Bc8 19.Be5 Qb7 20.Qd4 Nh5 21.b5 f6 22.Bg3 Ng3 23.hg3 Bd7 24.Nh4 Qc8 25.Ng6 Rf7 26.Ne7 Re7 27.Bd3 Re5 28.Qf4 Be6 29.Rfe1 Qd7 30.e4 de4 31.Be4 Bd5 32.Bf3 Bf3 33.gf3 Rae8 34.Qc4 Kh8 35.Qc3 Qh3 36.Re5 Qg3 37.Kf1 Re5 38.Rd1 Qh3 39.Kf2 Qh2 40.Kf1 Qe2 41.Kg1 Rg5 42.Kh1 Qg2 0–1. poganinbezdom (1685) – maciek94, kurnik, 2012.

4.c4 e5 5.e3 Qg5 6.Nf3 Bf3 7.Qf3 c6 8.b5 Ne7 9.Be2 g6 10.0–0 Bg7 11.Qg3 Qg3 12.hg3 0–0 13.d3 c5 14.e4 Nd7 15.Nc3 f5 16.f3 Bh6 17.Bc1 Bc1 18.Rfc1 fe4 19.fe4 Rf6 20.Bg4 Nf8 21.a5 Rb8 22.ab6 ab6 23.Ra7 Nc8 24.Ra6 h5 25.Bc8 Rc8 26.Rb6 Nd7 27.Rb7 Nb8 28.Nd5 Rf7 29.Rf7 Kf7 30.Rf1 Kg7 31.Rf6 Rd8 32.Re6 Kh6 33.Ne7 Re8 34.Nf5 Kg5 35.Re8 gf5 36.ef5 Nd7 37.Rd8 Nf6 38.Rd6 1–0. rom49szachy – art2002, kurnik, 2012.

4.b5 e5

5.a5 ba5 6.Ra5 c6 7.Bc3+=.

5.a5 g6 6.ab6 ab6 7.Ra8 Ba8 8.e3 Nd7 9.Nf3 Nc5 10.Be2 Bg7 11.0–0 Nf6 12.Ne5 (better is 12.d4 ed4 13.ed4+=) 12...de5–/+ 13.Be5 Qd5 14.Bc7?? (better is 14.Bf3 Qe5 15.Ba8+=) 14…Qg2# 0–1. aleksandras19 – slabeusz1950, kurnik, 2011.

5.Nf3 Nd7 6.g3 Bf3 7.ef3 Ngf6 8.Bg2 Rc8 9.0–0 Nc5 (9...Be7 10.f4+=) 10.Qe2 Be7 11.d4 ed4 12.Bd4 0–0 13.Nc3 Ne6 14.Be3 d5 15.Bd2 d4 16.Ne4 Ne4 17.Qe4 Nc5 18.Qc6 Qd6 19.f4 Qc6 20.Bc6 (worse is 20.bc6 a5–/+) 20...Bf6 21.Rab1 Rcd8 22.Bb4 Be7 23.a5 h6 24.ab6 ab6 25.Rfd1 Bd6 26.Rd4 Na4?? 27.Bd6+– Rd6 28.Rd6 cd6 29.Rd1 Rd8 30.Rd4 Nc3 31.Kf1 f5 32.Ke1 g6 33.Kd2 Nb1? 34.Kc1 Nc3 35.Kd2 Ne4?? 36.Ke3 Nf6 37.c3 Ng4 38.Kf3 Nh2 39.Kg2 Ng4 40.Bd5 Kg7 41.f3 Nf6 42.Bc6 g5 43.fg5 hg5 44.f4 g4 45.Bd5 Nd5 46.Rd5 Kf6 47.Kf2 Ke6 48.c4 1–0. wk1234 – csumpi, kurnik, 2012.

5.Nf3 Be7 6.g3 Nf6 7.Bg2 0–0 8.0–0 Nbd7 9.d4 Re8 10.de5 de5 11.Ne5 Bg2 12.Kg2 Ne4?? (better is 12...Ne5 13.Be5 Qc8+=) 13.Nd7 f6 (13...Bd6 14.f3 Ng5 15.f4+–) 14.Qd3 Nd6 15.Qd5 Kh8 16.Qc6 Bf8 17.Rd1 Re2 18.Nc3 Rc2 19.Rab1 Be7 20.Nd5 Rc6–/+ 21.bc6 Ne4 22.f3 Ng5 23.N5f6? Bf6–+ 24.Nf6 gf6?? 25.Rd8+– Rd8 26.Bf6 Kg8 27.Bd8 Ne6 28.Re1 Kf7 29.Bh4 h6 30.g4 Nf4 31.Kg3 Ng6 32.f4 Nh4 33.Kh4 Kf6 34.Kh5 Kg7 35.Re7 Kf8 36.Rc7 Ke8 37.Ra7 Kd8 38.Kh6 Kc8 39.f5 b5 40.ab5 Kb8 41.b6 Kc8 42.f6 Kb8 43.f7 Kc8 44.f8Q# 1–0. wk1234 – yassine, kurnik, 2012.

5.Nf3 Be7 6.g3 Bf6 7.Bg2 e4 8.Nd4 c5 9.Nc6? (better is 9.bc6!? Nc6 10.Nc6 (10.Be4? d5–+) 10...Bc6 11.Nc3=) 9...Nc6 (9...Bc6!? 10.Bf6 Qf6 11.Nc3–+) 10.Bf6 Qf6 (10...gf6?! 11.bc6 Bc6 12.Nc3–/+) 11.Nc3? (better is 11.bc6 Bc6 12.Nc3–/+) 11...Nd4 12.Ne4 Qe7 13.Nd6–/+ Qd6 14.Bb7 Rd8 15.Bg2 Nf6 16.c3 Ne6 17.0–0 Kf8 18.Qb3 g6 19.Rad1 Kg7 20.d4 Rc8 21.d5 Nc7 22.c4 a6 23.Qb2 ab5 24.ab5 Ra8 25.Ra1 Ra1+= 26.Ra1 Ra8 27.e4 Kg8?? 28.e5 Ra1 29.Qa1 Qe7?? 30.ef6 Qe2?? 31.d6 Ne6 32.Qa8 Nf8 33.d7 (33.d7 Qd1 34.Bf1 Qd7 35.Qb8+–) 1–0. wk1234 – huka, kurnik, 2012.

5.Nf3 Nf6 6.g3 Be7 7.Bg2 0–0 8.0–0 a6 9.Nc3 a5 10.d4 ed4 11.Nd4 Bg2 12.Kg2 Qd7 13.f3 Nd5?? (better is 13...d5=) 14.Nd5+– c6 (14...Re8+–) 15.bc6 Nc6 16.Nc6 Qc6 (16...Bd8 17.Nd8 Rad8 18.Nb6 Qc6+–) 17.Ne7 (17.Ne7 Kh8 18.Nc6+–) 1–0. wk1234 – marko1985, kurnik, 2012.

5.Nf3 Nf6 6.g3 Be7 7.Bg2 0–0 8.0–0 a6 9.c4 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.d3 Nc5 13.Nc3 Qd7 14.Qc2 Ra8 15.Rd1 Ne6 (better is 15...Qg4=) 16.d4?? (better is 16.Ne5!? de5 17.Bb7+/–) 16...e4 (16...ed4 17.Na4 Be4 18.Qb3–/+) 17.Nh4 Rb8?? (better is 17...Nd4 18.Qb2 Ne6–/+) 18.Ne4 Ne4 19.Be4 Bh4 20.Bb7 Rb7 21.gh4 Nf4 22.Qe4+/– Qg4 23.Kh1 Rb8 24.Rg1 Qe2? 25.Qe2?? Ne2+= 26.Re1 Nd4?? 27.Bd4+– 1–0. wk1234 – marko1985, kurnik, 2012.

5.Nf3 Nf6 6.g3 Bf3 7.ef3 Nbd7 8.Bg2 d5 9.0–0 d4? (better is 9...Bd6=) 10.Re1+– Bd6 11.Bd4 (better is 11.f4!? e4 12.Be4 Ne4 13.Re4 Kf8 14.Rd4+–) 11...0–0+/– 12.Bb2 Rc8 13.Nc3 c6 14.Ne4 Nc5? (better is 14...Ne4 15.fe4 Qc7+/–) 15.Nd6 Qd6 16.Be5 (16.Re5?! Rcd8 17.f4 Qd2 18.Qd2 Rd2+–) 16...Qe7 17.bc6 Rc6 18.f4 Re6 (18...Rcc8 19.a5+–) 19.d4 Ncd7 20.f5 Re5 21.de5 Ne5 22.f4 Rd8?? 23.Qc1 Qc5 24.Kh1?? Neg4= 25.h3 Nf2 26.Kh2 h5?? 27.Re5 Qc3 28.Re3?? Qc5?? 29.Re2 g5?? 30.Qf1+– g4 31.Qf2 Qc3 32.Rae1 gh3 33.Bh3 Kg7 34.Qe3 Qc6 35.Qe7 Ng4 36.Bg4 hg4 37.Qd8 Qh6 38.Qh4 Qd6 39.Qg4 Kf8 40.Re8# 1–0. wk1234 – csumpi, kurnik, 2012.

3.a4 e6

4.Ra3 Bb4?? 5.Bg7+– Ba3 6.Na3 Qe7 7.Qa1 (7.Bh8?! Qa3 8.e3 Nc6=) 7...f6 8.Bh8 h6 9.Nf3 Bf3 10.gf3 e5 (10...Nc6 11.Rg1 0–0–0 12.Bg7+–) 11.Rg1 Qh7 12.Bg7 (12.Qa2 Kf8 13.Qd5 Nc6+–) 12...Kf7 13.Nb5 Na6 14.Qa2 Ke7 15.e3 c6 16.Nc3 Nc7 17.a5 b5 18.Ne4 Ne6 19.Qa3 c5 20.Nc5 Ng7 21.Bb5 d6 22.Nb7 Ne8 23.Be8 Ke8 24.Nd6 Kd8 25.Nb7 Kc8 26.Nd6 Kc7?? 27.Qc5+– Kd8 28.Nb7 Ke8+– 29.Qc6 Kf8 30.Qd6 Ke8 31.Qe6 Kf8 32.Nd6 Rd8 33.Nf5 Qf7 34.Qf7 Kf7 35.e4 Ke6 36.Rg7 h5 37.Ra7 Rb8 38.Ra6 Kf7 39.Rb6 Kg6 40.c4 Ra8 41.a6 Nh6 42.Nh6 Kh6 43.c5 Kg6 44.c6 Kg5 45.c7 f5 46.ef5 Kf5 47.Rb8 Ra7 48.c8Q (48.c8Q Kf6 49.Rb6 Kg7 50.Qf5 Kg8 51.Rb8 Kg7 52.Qf8 Kg6 53.Rb6 Kg5 54.Qf6) 1–0. xtom – lemac7, kurnik, 2011.

4.Ra3 f5 5.Rg3 Nf6 6.h4 Nc6 7.b5 Ne7 8.h5 f4 9.Rgh3 Nf5 10.Nf3 d6 11.e3 fe3 12.fe3 Be7 13.Bd3 0–0 14.Ng5 Qd7 15.Rf1 Nh6 16.Rg3 Kh8 17.c4 e5 18.Qb3 Nh5 19.Rh3 Rf1 20.Kf1 Rf8 21.Ke1 Bg5 22.Rh5 Qg4 23.Rh6 Bh6 24.Be2 Qg3 25.Kd1 Bg5 26.c5 Bg2 27.Kc2 Be4 28.Bd3 Bd3 29.Qd3 bc5 30.Nc3 Qg4 31.Ne4 Be7 32.Qd5 h6 33.a5 Qd7 34.Nc3 Rf6 35.Qa8 Kh7 36.Qa7 Bd8 37.b6 Rf7 38.b7 c6 39.a6 Ba5 40.Ne4 d5 41.Nc5 Qe7 42.Nd3 Bb6 43.Qb6 e4 44.Ne5 Qe5 45.Be5 h5 46.Qc7 Kg6 47.Qf7 Kg5 48.Bf6 1–0. xtom – greenkobold (1610), kurnik, 2012.

4.a5 Nc6 5.ab6 ab6 6.Ra8 Qa8 7.c3 Nf6 8.e3 g6 9.Nf3 Bg7 10.Bd3 0–0 11.0–0 d6 12.Qc2 Ne7 13.Nd4?? (better is 13.Be2=) 13...Bg2 14.Re1 Bh3 15.f3?? (better is 15.e4–+) 15...e5 16.e4 ed4 17.cd4 Qb7 18.d5 Nh5 19.Bg7 Kg7 20.Qc3 f6 21.Na3 Nf4 22.Nc4 White prepares the advance e5 22...Nd3 23.Qd3 f5 24.e5 Qd5 25.Qd5 Nd5 26.e6 Re8 27.Kf2 f4 28.e7 Re7 29.Re7 Ne7 30.Ke2 Be6 31.Nb2 Nd5 32.Nd3 Bf5 33.Nf2 Nb4 34.h4 h6 35.d3 Kf6 36.d4 c5 37.dc5 dc5 38.Nd1 Nd5 39.Nb2 b5 40.Kd2 b4 41.Kc1 Ne3 42.Nc4 Ng2 43.Kb2–+ Nh4 44.Nd6 Nf3 45.Kb3 h5 46.Kc4 h4 47.Kc5 h3 48.Kb4 h2 49.Kc5 h1Q 50.Ne8 Kg5 0–1. dtpwaldi – chamkator, kurnik, 2011.

4.a5 Nf6 5.b5+=.

4.a5 Nf6 5.ab6 ab6 6.Ra8 Ba8 7.b5 c6 8.c4 cb5 9.cb5 Bc5 10.e3 0–0 11.Nf3 d5 12.Bd4 Qd6 (12...Bd4 13.Nd4 Qe7 14.Nc2=) 13.Qa4 (13.Bf6!? gf6 14.Qa4=) 13...Nbd7+= 14.Be2 e5 15.Bc5 Nc5 16.Qc2 (16.Qa1 e4 17.Qe5 Qe6 18.Qe6 Ne6+=) 16...e4 (better is 16...d4!? 17.Bc4 Be4–/+) 17.Nd4+= Bb7 18.0–0 Ra8 19.h3 g6 20.f4 ef3 21.Bf3 Nce4 22.Be4 Ne4 23.Nc3 Ng3 24.Rf3 Ra1 25.Nd1 Ne4 26.Nb3= Ra8 27.d3 Rc8 28.Qb2 Nc5 29.Nc5 bc5 30.Rf6 Qg3 31.Rb6 Qe1+= 32.Kh2 Qd1 33.Rb7 Qd3 34.Qf6 Attacks the backward pawn on f7 34...Qf5 35.Qd6 c4 36.Rc7 c3 37.Qc5?? Rc7 38.Qc7+= d4 39.ed4 Qb5 40.Qc3 Qd5 0–1. aleksandras19 – rewersev6, kurnik, 2012.

4.b5 a5 5.Nf3 d5 6.g3 c6 7.Nc3 Bd6 (7...Nf6 8.Bg2=) 8.Bg2 (better is 8.Nd5!? f6 9.Nc3+/–) 8...Ne7 9.Na2 f6 10.Nd4 e5 11.Ne6 Qd7 12.Ng7 Kf7 13.Nh5 cb5 14.h4 ba4 15.Bh3 f5 16.f4 Ng6?? (better is 16...d4 17.Rg1 a3–/+) 17.Rf1+/– Re8? (better is 17...Qe7+/–) 18.fe5+– Be5 19.Bf5 Qd6 20.Bd7?? Ke7 21.Be8 Ke8?? 22.Be5+– Qe5 23.Nc3?? Qh5+= 24.Nb5 Bc6?? 25.Nc7+/– Kd7 26.Na8 Ba8 27.Ra4 Qe5 28.Qb1 Kc6? 29.Qb3 Nd7 30.c4 Kc7 31.cd5 Bd5 32.Qc3 Nc5?? 33.Qe5 Ne5+= 34.Rd4 Kd6 35.d3 Ke6 36.e4 Bb3 37.Rf5? Ncd3?? 38.Kd2 Nc5 39.Rh5 Nf3 40.Ke3 Nd4 41.Kd4 a4 42.Rh6 Kd7 43.Rb6 Ne6 44.Kc3 Nc5 45.Rh6 a3 46.Rh7+= Kc6 47.Re7 a2 48.Kb2 Kd6 49.Ra7 Kc6 50.h5+– Kb6 51.Rg7?? Be6?? 52.e5 Nd3–+ 53.Ka1 Kc5 54.Re7 Bd5 55.h6 Nb4 56.h7 Nc2–+ 57.Kb2 a1Q 58.Kc2 Be4 59.Kd2 Qb2 60.Ke3 Qd4 61.Kf4 Bh7 (61...Bh7 62.Kg5 Qd8–+) 0–1. wk1234 – pokutnik, kurnik, 2012.

4.b5 a6 5.Nc3 ab5 6.ab5 Ra1 7.Qa1 Bb4 8.Qa7 Qc8 9.Nf3 Bf3 10.gf3 Ne7 11.Bg2 0–0 12.f4 c6 (12...d5 13.Rg1 Qd7 14.Nd5 Nd5 15.Bd5=) 13.bc6 Nbc6 14.Qb6 Qa8 15.0–0 Rb8 16.Qc7?? (better is 16.Qe3+=) 16...Rb7–+ 17.Ra1 (17.Qb7 Qb7 18.Ba1 d5–+) 17...Qa1!! (17...Rc7 18.Ra8 Rc8 19.Rc8 Nc8 20.e3+/–) 18.Ba1 Rc7 19.Nb5 Rb7 20.c4 Bd2 21.Nd6 Rb1 22.Bf1 Ra1 23.Kg2 Bf4 24.e3 Bd6 0–1. wk1234 – zemman, kurnik, 2012.

4.b5 a6 5.Nc3 ab5 6.ab5 Ra1 7.Qa1 Nf6 8.Qa7 Qc8 9.Nf3 Bb4 10.g3 0–0 11.Bg2 c6 12.bc6 Nc6 13.Qa4 (13.Qb6 d6+=) 13...Bc3 (13...Nd4!+=) 14.Bc3= Nd5 15.Qa1 Nc3 16.Qc3 d5 17.0–0 Na5 18.Qc8 Rc8 19.c3 Nb3 (better is 19...Nc4!?=) 20.Rb1+/– Nc5 21.Rb6 Ba8 22.Nd4 Ne4 23.Be4 de4 24.Nb5 Bd5? (better is 24...Kf8+–) 25.Nd6 Rb8 (25...Rf8 26.c4 Ba8+–) 26.Rb8# 1–0. wk1234 – ujvarat221, kurnik, 2011.

4.b5 a6 5.e3 ab5 6.Bb5 c6 7.Bc4 b5 8.ab5 Ra1 9.Ba1 cb5 10.Bb3 Bg2 0–1. arti000 – chebun, kurnik, 2012.

4.b5 c6 5.Nc3 a6 6.Nf3 Nf6 (6...d5 7.e3=) 7.bc6 (7.e4 d5=) 7...Bc6 (7...Nc6 8.e4=) 8.e3 d5 9.Be2 (9.Nd4 e5 10.Nc6 Nc6=) 9...Bd6 10.0–0 (10.Ba3 Ne4=) 10...0–0 11.Ba3 Re8 (11...Ne4 12.Nb1=) 12.d4 e5 (Better is 12...Ba3 13.Ra3 Qc7=) 13.Bd6–/+ e4 14.Bf4 ef3 15.Bf3 Nbd7 16.Qd3 Ne4 17.Rfb1 Nc3 18.Qc3+– Rc8 19.Qd3 b5 20.ab5 Bb5 21.Qd1 Nf6 22.Bg5 h6 23.Bf6 Qf6 24.Bd5 Red8 25.Bb7 Rb8 26.Be4 Rd6? 27.c4! Rdb6 28.cb5 Rb5 29.Qg4 Rb1 30.Bb1 Qb6 31.Bd3 Qb2 32.Ra6 Qc1 33.Bf1 Rb1 34.Ra8 Kh7 35.Qf5 g6 36.Qf7 1–0. market (2240) – mangere12 (1605), GameColony.com, 2002.

4.b5 c6 5.Nc3 Bb4 6.Qb1 Nf6 7.Nf3 Bc3 8.Bc3 cb5 9.ab5 Bf3 10.gf3 a6 11.Bg2 Rg8 12.f4 Nd5 (12...Ra7!?+/–) 13.Bd4 Ra7 14.c4 (better is 14.Bd5!? ed5 15.c3+–) 14...Nf4+= 15.Bf3 Qc7? (better is 15...Ng6!?+=) 16.Qh7 Kf8 17.Qc2 (17.Qe4 d5 18.Qe3 Nd7 19.Ra6 Ra6 20.ba6 Ke7+–) 17...ab5 18.Ra7 Qa7 19.0–0 (19.cb5 Ke7 20.0–0+–) 19...Qc7= 20.d3 Rh8 21.Qb2?? (better is 21.Rb1 Nc6 22.Be3 bc4 23.Bb6–/+) 21...Ne2! 22.Qe2 Qh2# 0–1. wk1234 – lipniok, kurnik, 2012.

4.b5 c6 5.Nc3 Nf6 6.e3=.

4.b5 c6 5.Nf3 Nf6=.

4.b5 d6 5.Nf3 Nd7 6.g3 h6 7.Bg2 Ne7 8.h4 Nc8 9.Nc3 a6 10.0–0 a5 11.Nd4 Ne7?? (better is 11...Bg2 12.Kg2 Ne7=) 12.Bb7+– Rb8 13.Nc6 Nc6 14.bc6 Rb7? 15.cb7 Qb8 16.e3 Qb7 17.f4 g5 18.Qf3 d5 19.fg5 hg5 20.Qf7 Kd8 21.Qe6 gh4 22.Nd5 hg3 23.Bh8 c6 24.Bf6 Nf6 25.Qf6 Be7+– 26.Ne7 Qe7 27.Qe7 Ke7 28.Rf3 1–0. wk1234 – deni2010, kurnik, 2011.

4.b5 Be7?? 5.Bg7+– Bf6 6.Bh8 Bh8 7.c3 Qe7 8.Nf3 d6 9.g3 Nd7 10.Bg2 Nc5 11.0–0 0–0–0 12.d4 Nd7 13.a5 Kb8 14.a6 (better is 14.ab6!? ab6 15.Qa4 d5+–) 14...Ba8 15.Nfd2 d5 16.c4 (16.f4 Ngf6+–) 16...Qf6? (better is 16...Bd4!? 17.Ra2 Nc5+–) 17.e3+– Ne7 18.cd5 Nd5 19.Qb3 h5 20.Ne4 Qf5 21.Nbd2 N7f6 22.Nf6 Qf6 23.Rac1 h4 24.Ne4 Qh6 25.Qc2 Rc8? (25...Rd7 26.Rfd1+–) 26.Nc3 (better is 26.Nd6! Nb4 27.Qc4+– (27.Nf7?! Qh5 28.Ne5 Be5+–)) 26...hg3 27.fg3?? Qe3?? 28.Kh1+– Bd4 29.Nd5 ed5?? 30.Rcd1 Bc5? 31.Qd3 Qd3 32.Rd3 d4 33.Ba8 Ka8 34.Rf7 Kb8 35.h3 Rg8 36.h4 Bd6 37.Kg2 Re8 38.Rd4 Re2 39.Rf2 Re8 40.h5 Kc8 41.g4 Re7 42.Rf5 Kd7 43.g5 Re3 44.h6 Ke6 45.Rf6 Ke5 46.Rd2 Re4 47.Rdf2 Rg4 48.Kh3 Rg5 49.h7 Rh5 50.Kg4 Rh7 51.R6f5 Kd4 52.Rd2 Kc4 53.Rc2 Kb3 54.Rcf2 Rg7 55.Kh5 Kb4 56.Kh6 Re7 57.Rf7?? Re6 58.Kg7 Kb5 59.Ra2 Re2?? 60.Re2+– Ka6 61.Ra2 Kb7 62.Kf6 a5 63.Ke6 Kc6 64.Rc2 Kb5 65.Kd7 a4 66.Rc7 Bc7 67.Kc7 a3 68.Rf5 Kb4 0–1. wk1234 – spunciu, kurnik, 2012.

4.b5 Qg5 5.Nf3 Qg6 6.e3 Nc6?? (better is 6...a6=) 7.bc6+– Bc6 8.Nc3 Nf6 9.d3 Nd5 10.Nd5 Bd5 11.e4 Bb7 12.Ne5 Qh6 13.Be2 d6 14.Ng4 Qg6 15.0–0 h5 16.Ne3 Be7 17.f4 d5 18.f5 ef5? 19.Nf5 de4 20.Ng7 Kd8 21.Bh5 Qc6 22.de4 Kc8 23.Bg4 Kb8 24.Bf3 Rd8 25.Qe2 Qh6 26.Nf5 Qe6 27.Ne7 Qe7 28.Rad1 Rg8 29.g3 Qc5 30.Qf2 Qb4 31.Bf6 Qa4 32.Rd8 Rd8 33.Bd8 Qd7 34.Rd1 Qe6 35.Bg5 Bc8 36.Rd8 Kb7 37.e5 c6 38.Qd4 Ka6 39.Qa4 Kb7 40.Rd6 Qe5 41.Qc6 Kb8 42.Qa8 Kc7 43.Qc6 Kb8 44.Bf4 (44.Bf4 Qe1 45.Kg2 Qf2 46.Kf2 Be6 47.Re6#; 44.Rd1 Qg3 45.hg3 a6 46.Qb6 Bb7 47.Qb7#) 1–0. typ48 – geygey, kurnik, 2012.

4.c4 Qg5 5.Nf3 Bf3 6.ef3 Bb4 7.h4 Qg6 8.h5 Qh6 9.Nc3 Nc6 10.Ne4 f5 11.Nc3 Nf6 12.Bd3 Qg5 (12...Nh5?! 13.Nb5 0–0 14.g4 fg4 15.fg4–/+) 13.0–0? (better is 13.g3!?–+) 13...Nh5 14.Re1 (14.Bc2–+) 14...Nf4 15.g3 Nd3 16.Qc2 Ne1 17.Re1 Bc3 18.Bc3 0–0 19.Qb2 Rae8 20.f4 Qg4 21.Re3 Qd1 22.Kg2 h5 23.Bg7 Rf7 24.Bh6 Rh7 25.Bg5 h4 26.Bh4 Rh4! 27.gh4 Re7 28.Rg3 Kf8 29.Qh8 Kf7 30.Rg7 Kf6 31.Qh6# 1–0. waldi1962 – painkillerdrums, kurnik, 2012.

4.e3 Nc6 5.b5 Na5 6.Nf3 Nf6 7.Be2 c5 8.0–0 c4 9.Nc3 Bb4 10.h3 Bc3 11.Bc3 Rg8 12.Ba5 ba5 13.Bc4 Bd5 14.Be2 Qb6 15.c4 Be4 16.d4 Bb7 17.c5 Qd8 18.Rc1 Rc8 19.Nd2 Nd5 20.Nc4 Kf8 21.Nd6 Qc7 22.Nc8 Qc8 23.Bf3 Nf6 24.Bb7 Qb7 25.Qf3 Qf3 26.gf3 Nd5 27.Rc4 Ke7 28.e4 Nb4 29.Rb1 Rc8 30.Rbb4 ab4 31.Rb4 Rb8 32.a5 Kd8 33.b6 a6 34.Rc4 Ke7 35.d5 ed5 36.ed5 Kd8 37.c6 dc6 38.dc6 Kc8 39.Re4 Kd8 40.c7 Kd7 1–0. rom49szachy – bam40, kurnik, 2012.

4.e3 Nc6 5.b5 Na5 6.Nf3 Nf6 7.Be2 g6 8.0–0 Bg7 9.d4 Qe7 10.c4 h5 11.Nbd2 h4 12.h3 Nh5 13.Qc2 0–0–0 14.e4 Kb8 15.c5 Rc8 16.Bc3 Ng3 17.fg3 hg3 18.Ba5 f5 19.c6 dc6 20.bc6 Ba8 21.Bc3 fe4 22.Ne4 Bc6 23.Ng3 Bb7 24.a5 g5 25.ab6 cb6 26.Qa4 Ba8 27.Bb4 Qc7 28.Rac1 Qg3 29.Qd7 Bf3 30.Bd6 Ka8 31.Bg3 Bd4 32.Kh1 Rc1 33.Rc1 1–0. rom49szachy – 00qqq1, kurnik, 2012.

4.e3 Nf6 5.b5 h6 6.c4 Qe7 7.Nf3 Nh7 8.Be2 Ng5 9.0–0 Qb4 10.Ba3 Qa5 11.Bf8 Rf8 12.Ng5 hg5 13.d4 a6 14.Nd2 ab5 15.cb5 Qb4 16.Nf3 Qd6 17.Ng5 Rg8 18.Bf3 c6 19.e4 Rh8 20.g3 Qe7 21.e5 Qg5 22.Bg2 f6 23.f4 Qh6 24.Kf2 fe5 25.de5 g5 26.fg5 Qg5 27.Qd6 Rf8 28.Kg1 Qe3 29.Kh1 Rf1 30.Rf1 c5 31.Rf6 Bg2 32.Kg2 Qe2 33.Kh3 Qh5 34.Kg2 Qe2 35.Kg1 Qe1 36.Rf1 Qe3 37.Rf2 Ra4 38.Qf8 1–0. rom49szachy – dreben, kurnik, 2012.

4.e3 Qg5 5.Nf3 Bf3 6.Qf3 d5 7.Be2 Nc6 8.b5 Ne5 9.Qg3 Qg3 10.fg3 Nc4 11.Bc3 Bc5 12.Bd4 Bd4 13.ed4 Nf6 14.d3 Ne3 15.Na3 a6 16.Kf2 Neg4 17.Kf3 ab5 18.Nb5 Kd7 19.h3 Nh6 20.g4 Nhg8 21.Rhc1 c6 22.Nc3 b5 23.ab5 Ra1 24.Ra1 cb5 25.Nb5 Kc6 26.Nc3 Nd7 27.Ra7 Ngf6 28.Nd1 Rb8 29.Ne3 Rb7 30.Ra2 Nb6 31.c4 dc4 32.dc4 Nbd7 33.g5 Ne8 34.Kf4 f5 35.Bf3 Kc7 36.Bb7 Kb7 37.Rb2 Kc6 38.Ra2 Nb6 39.Ra7 Nc7 40.h4 g6 41.g4 fg4 42.Kg4 1–0. rom49szachy – patata, kurnik, 2012.

4.Nf3 (--> 3.Nf3 e6 4.a4).

4.Ra3 Nf6–/+

5.Rg3 Bb4 6.Rg7 Nc6 7.Nf3+=.

5.Rg3 Bb4 6.Rg7 Bf8 7.Rg3 d6 8.Na3 Nbd7 9.Qa1 Qe7 (9...e5 10.d4 Ne4 11.Rh3+=) 10.Nf3 0–0–0 (10...e5 11.e3+=) 11.d4 (11.a5!?=) 11...Ne4+= 12.Rg4 (12.Rh3!?+=) 12...h5 13.Rf4 (13.Rh4 Nf2! 14.Kf2 Bf3–/+) 13...Bh6–+ 14.Re4 Be4 15.Nb5 (15.a5 Rdg8–+) 15...Kb7 (15...a6 16.d5 ab5 17.Bh8–+) 16.a5 d5?? (16...a6 17.ab6 cb6 18.Na3–+) 17.a6?? (better is 17.ab6 a6 18.Nc7 (18.bc7?! Ra8 19.Nc3 Bf3 20.ef3 Qd6=) 18...Qb4 19.Bc3 Qb6 20.Ba5+/–) 17...Kb8–+ 18.e3 c5?? 19.Bd3?? Bd3 20.cd3–/+ c4?? 21.Ba3+– Qe8 22.Bd6 Kc8 23.Na7# 1–0. xtom (1620) – aaaassss1 (1705), kurnik, 2011.

5.Rg3 Nc6 6.b5 Ne7 7.Na3 Ng6 8.Qa1 Be7 9.h4 h5 10.e3 d6 11.Bd3 Rh6 12.Nf3 Bf3 13.gf3 Qd7 14.Rhg1 Nh4 15.Rg7 Nf3 16.Ke2 Ng1 17.Qg1 0–0–0 18.a5 d5 19.ab6 cb6 20.Rf7 Ne4 21.Be4 de4 22.Nc4 Qb5 23.Re7 Qc4 24.Kd1 Qd5 25.Bc3 e5 26.Qf1 b5 27.Ra7 Kb8 28.Ra5 Rb6 29.Qh3 Qd6 30.Qh5 b4 31.Be5 Kb7 32.Bd6 Rbd6 33.Qb5 Kc8 1–0. xtom – kutinho222, kurnik, 2012.

5.Rg3 Ne4 6.Re3 Bb4 7.Nc3 Nc3 8.dc3 Be7 9.c4 Bf6 10.Qa1 0–0 11.h4 Nc6 12.h5 Nb4 13.Kd2? (13.Bf6 Qf6 (worse is 13...gf6 14.Qd1–/+) 14.Qf6 gf6–+) 13...d5 14.h6? (better is 14.Bf6 gf6 15.Rh4–+) 14...dc4 15.Kc1 c5 (better is 15...Bg5 16.hg7 Re8–+) 16.hg7–/+ Bd4?? (better is 16...Bb2 17.Qb2 Re8–/+) 17.gf8Q Kf8 18.Bd4 cd4 19.Reh3 Be4 20.f3?? Nc2 21.Qa2 Bg6 22.Rh7?? Bh7 23.Rh7= Kg8 24.Qc2 Qf6?? 25.Rh3 Rc8 26.Rg3 Kf8 27.Nh3 Rc5?? 28.Qh7 d3 29.Nf4 Qa1 30.Kd2+= c3 31.Kd3?? c2 32.Rg8+– Ke7 33.Ng6 Kd6–+ 34.Rd8 Kc7 35.Qf7 Kd8 36.Qe7 Kc8 37.Qe8 Kc7 38.Qe7 Kc8 39.Qe6?? Kc7 40.Qf7 Kb8 41.Qe8 Rc8 42.Qe5 Ka8 43.Qa1+= Rd8?? 44.Kc2+– 1–0. xtom – misscocour (1685), kurnik, 2011.

5.Rg3 g6 6.Na3 Bg7 7.Qa1 0–0 8.h4 Nh5 9.Rg5 Bb2 10.Qb2 Qf6 11.c3 Nc6 12.Nf3 Ne7 13.g4? (better is 13.Nb5!?+=) 13...Nf4 14.a5?? (better is 14.d4!?–/+) 14...Nd3! 15.ed3 Qf3 16.Rh3 Qf6 17.Kd1?? Nd5 18.Kc2? Nf4 19.Re3 Nd5?? 20.Rh3 Rfb8 21.Bg2 ba5 22.b5 Ne3! 23.fe3 Bg2 24.Rg3? Bb7 25.Nc4 Bd5 26.Ne5 Qe7 27.e4 Bb7 28.c4? c6?? 29.Nf3?? cb5 30.h5?? bc4–+ 31.hg6 cd3 32.Kd3 fg6 33.Ne5 Be4! 34.Ke4 Rb2 (34...Rb2 35.Nd3 d5 36.Kf4 Rf8 37.Rf5 ef5–+) 0–1. xtom – alejandro1234 (1775), kurnik, 2011.

5.Rg3 Rg8 6.Na3 (better is 6.b5!?+=) 6...Bb4–/+ 7.Qa1 (7.Nf3 Ne4–+) 7...Be7 (7...Ne4 8.Rd3–+) 8.Nf3 Nc6 9.h4 (9.e3 d6–/+) 9...h6 10.h5 d6 11.Rh4 e5 12.Rhg4?? (better is 12.e4–+) 12...Ng4 (12...Nh5 13.Rh3 Bc8 14.Rc4 Bh3 15.gh3–+) 13.Rg4 Qd7 14.Rg3 0–0–0 15.e3 f5 16.Bb5 a6 17.Bc4 d5 18.Be2 Bf6 19.Rg6? Rde8 20.c4 dc4 21.Nc4 Ne7 22.Nce5 Be5 23.Ne5–/+ Qd8 24.Nf7?? Qd5–+ 25.Ne5 Ng6 26.hg6 f4 27.Bf3 Qa5?? 28.Bb7?? Kb7–+ 29.Nc4 Qb4 30.Qc1 fe3 31.fe3 Rgf8 32.a5 b5 33.Ne5 Re5! 34.Be5 Qh4 35.Ke2 Qf2 36.Kd3 Qf5 37.Ke2 Qe5 38.Qc2 Qh5 39.Ke1 Qh1 40.Ke2 Qg2 41.Kd3–+ Qg6 42.e4 Qg3 43.Kd4 Rd8 44.Kc5 Qe5 45.Kb4–+ c5 46.Kb3 c4 47.Ka2 Qc5 (47...Qc5 48.Qb2 Qd4 49.Qd4 Rd4–+) 0–1. xtom (1645) – aaaassss1 (1680), kurnik, 2011.

5.Rh3 Bb4 6.Na3 Ba3 7.Ra3 Qe7 8.Qa1 0–0 9.Rg3 Kh8 10.h4 d6 11.f4 Rg8 12.h5 Nbd7 13.h6 g6 14.Nf3 Bf3 15.gf3 Rgc8 16.Rhg1 Kg8 17.e4 (17.e3 a5=) 17...Kf8 (17...Nh5 18.Rg4 f5 19.Rg5 Nf4 20.Bg7–/+) 18.f5?? (18.Ba6 Rcb8 19.Rg5 Nh5+=) 18...e5?? (better is 18...ef5 19.d3 Re8–+) 19.fg6 fg6 20.Bb5 a6 21.Bd7 Qd7 22.f4 Ne4 23.fe5? Ng3–+ 24.Rg3 Re8 25.Qa3 c5 26.Qb3 Qe6 27.Rf3 Ke7?? 28.Qb6= Qd7 29.Kd1+/– Rf8?? 30.ed6+– Qd6 31.Re3 Kf7 32.Qb3 Qd5 33.Qd5 1–0. xtom – lemac7, kurnik, 2011.

4.b5 Qe7

5.d3 d6 6.e4 Nd7 7.Nf3 0–0–0 8.Be2 d5 9.e5 f6 10.d4 fe5 11.de5 Nc5 12.Nbd2 d4 13.0–0 d3 14.Bd3 Nd3 15.cd3 Rd3 16.Qe2 Qd8 17.Rad1 Be7 18.h3 Nh6 19.Nb1 Rd1 20.Rd1 Qe8 21.Nc3 Qg6 22.Kh2 Rf8 23.Re1 Nf5 24.Ne4 h5 25.Bc1 h4 26.Bg5 Be4 27.Be7 Ne7 28.Qe4 Qe4 29.Re4 Rh8 30.Nh4 Nf5 31.Nf3 Rd8 32.Ng5 Re8 33.g4 Nh6 34.Kg3 Kd7 35.f4 Ke7 36.Nf3 Rd8 37.Rd4 Rc8 38.Nd2 c5 39.bc6! Rc6 40.Rc4 Kd7 41.Rd4 Kc7?? 42.Ne4 Rc2 43.Rd6 Re2? 44.Kf3 Ra2 45.Re6 Ra4 46.Re7 Kd8 47.Rg7 Ra3 48.Kf2 Ra2 49.Kg3 Ra4 50.Nf6 b5 51.Rb7 b4 52.Nd5 a5 (52...a5 53.e6 Ra3 54.Kf2 Rc3 55.Rb8 Rc8 56.e7 Ke8 57.Rc8 Kf7 58.e8Q Kg7 59.Rc7 Nf7 60.Qf7 Kh6 61.Qe6#). 55aa55 – endingen, kurnik, 2012.

5.e3 f6 6.Nf3 g6 7.Be2 Bg7 8.0–0 Qf7 9.c4 Ne7 10.d4 0–0 11.Nbd2 c6 12.Qb3 cb5 13.ab5 d6 14.e4 Nd7 15.Ba3 Rad8 16.Bd6 f5 17.e5 Rfe8 18.Ra7 Bf3 19.Nf3 Nc8 20.Raa1 Nd6 21.ed6 e5 22.de5 Ne5 23.Rad1 Nf3 24.Bf3 Qf6 25.d7 Re7 26.Bc6 h5 27.Rde1 Re1 28.Re1 Qf7 29.h3 Kh7 30.Qb4 Bf6 31.Qd6 Kh6 32.Re6 Bc3 33.g3 h4 34.gh4 Kh5 35.Bf3 Kh6 36.h5 Bd4 37.Rg6 Kh7 38.h6 Rd7 39.Rg7 Bg7 40.Qb6 Bh6 41.Qc6 Qg7 42.Kf1 Qa1 43.Kg2 Rg7 44.Bg4 fg4 45.Qe4 Kh8 46.hg4 Qf6 47.f3 Qb2 48.Kh3 Qf6 49.Kg2 1–0. rom49szachy – rin08, kurnik, 2012.

5.Nf3 d6 6.g3 Nd7 7.Bg2 0–0–0 8.0–0 d5 9.Ba3 Qe8 10.Bb2 f6 (10...Qe7 11.d4+/–) 11.Nd4 e5 12.Nf3 d4 13.c3 Ne7 14.cd4 ed4 15.Nd4 Nd5 16.e4 Nb4 17.d3 (better is 17.a5!?+–) 17...Ne5+= 18.Qc2?? (better is 18.a5 Nbd3 19.Bc3+=) 18…Nc2–+ (18...Nc2 19.Nc2 Nd3–+) 0–1. wk1234 – kosaek10, kurnik, 2012.

5.Nf3 Nf6 6.g3 g6 7.Bg2 Bg7 8.0–0 0–0 9.Ba3 d6 10.Ne5 (better is 10.Bb2=) 10...Qd8?? (better is 10...Bg2 11.Kg2 Ng4–/+) 11.Bb7+– de5 12.Ba8 Qd4 13.c3 Qd7 14.Bf8 Bf8 1–0. wk1234 – anddzej, kurnik, 2012.

5.Nf3 Nf6 6.g3 g6 7.Bg2 Bg7 8.0–0 0–0 9.c4 d5? (9...a6 10.d4=) 10.cd5 (10.Ba3 Qd8 11.Bf8 Qf8 12.cd5 Nd5+/–) 10...Bd5 (10...Nd5 11.Bg7 Kg7+=) 11.Nd4?? (better is 11.Ba3 c5 12.bc6+–) 11...c6 12.Bd5 ed5 13.Qc2? c5–/+ 14.Nc6 Nc6 15.bc6 d4 16.e3 Qc7 17.ed4 Qc6 18.Rc1 Ne4 19.dc5 Nc5 20.Bg7 Kg7 21.Na3 Qa4 22.Qc3 Kg8 23.Nc4 Rac8?? 24.Ra4+– Na4 25.Qb4 Nc5 26.d4 Nd3+= 27.Qc3? Nc1–+ 28.Qc1 b5 29.Qa3 Rc4 30.Qa7–/+ Rfc8 31.d5 b4 32.d6 Rd8 33.d7 Rd4?? 34.Qb6 R8d7–+ 35.Qb8 Rd8 36.Qe5 b3 37.Qb5 Rd3 38.Kg2 R8d5 39.Qb4 b2?? 40.Qb2–/+ Rd2 41.Qb8 Rd8 42.Qe5 R8d5 43.Qe3 R2d3 44.Qe8 Kg7 45.h4 Rf5 46.Qe4 Rd2–+ 47.Kh3 Rff2 48.Qe3?? f5 49.g4?? fg4 50.Kg4 h5 51.Kg3 Rg2 52.Kf3 Rdf2! 53.Ke4?? Rg4 54.Kd3 Rff4 55.Qe5 Kh6?? 56.Qh8# 1–0. wk1234 – norocosux, kurnik, 2012.

4.b5 Nf6

5.c4 Bc5 6.Nf3 d5 7.e3 Nbd7 8.d4 Bb4 9.Bc3 Qe7 10.Qc2 dc4 11.Bc4 Nd5 12.Be2 Bc3 13.Nc3 Qb4 14.Rc1 Nc3 15.Qc3 Qa4 16.0–0 0–0 17.Ra1 Bf3 18.gf3 Qa1 19.Ra1 Nf6 20.Qc7 Nd5 21.Qa7 Ra7 22.Ra7 Rc8 23.Rb7 g6 24.Bd3 Nc3 25.Bf1 Nd5 26.Bd3 Rc1 27.Kg2 Rd1 28.Be4 Rb1 29.Bd5 ed5 30.Rb6 Kg7 31.e4 Rd1 32.ed5 Rd4 33.d6 Kf6 34.Rc6 Ke6 35.Kg3 Rd6 36.Rd6 Kd6 37.Kf4 Kc5 38.Ke5 Kb5 39.Kf6 Kc5 40.Kf7 Kd5 41.Kg7 Ke5 42.Kh7 g5 43.Kh6 Kf4 44.h3 Kf5 45.Kh5 Kf4 46.Kg6 Kf3 47.Kg5 Kf2 48.h4 1–0. blackiwhite (1740) – jazzeandomar (1685), kurnik, 2012.

5.e3 Be7 6.d4 d6 7.Nf3 Nbd7 8.c4 0–0 9.Nbd2 Re8 10.Bd3 Nf8 11.Qc2 a6 12.0–0 ab5 13.ab5 Qd7 14.Ne4 Ne4 15.Be4 Be4 16.Qe4 d5 17.cd5 Qd5 18.Qd5 ed5 19.Ne5 Bd6 20.Nc6 Nd7 21.Ra8 Ra8 22.Ra1 Ra1 23.Ba1 f6 24.Kf1 Kf7 25.h3 Nf8 26.Ke2 Ne6 27.f4 Ke8 28.f5 Nd8 29.Na7 Kd7 30.Bc3 Be7 31.Kd3 g6 32.g4 gf5 33.gf5 Nf7 34.h4 Nd6–/+ 35.Be1 Nf5 36.e4 de4 37.Ke4 Nd6 38.Kd5 Nf5 39.Bf2 Bd6 40.Nc6 h5 41.Nb8 Ke7 42.Kc6 Ke6 43.Na6 Ne7–+ 44.Kb7 Nd5 45.Kc6 Ne7 46.Kb7 Kd7 47.Nb8 Ke6 48.Na6= ½–½. typ48 – bebemicdetot, kurnik, 2012.

5.e3 g6 6.Nf3 Bg7 7.Be2 Qe7 8.0–0 d6 9.d4 Nbd7 10.c4 Ng4 11.Nbd2 h5 12.h3 f5 13.hg4 hg4 14.g3 gf3 15.Bf3 0–0–0 16.a5 d5 17.cd5 ed5 18.ab6 cb6 19.Ra7 Kb8 20.Ra1 Nf6 21.Kg2 Ne4 22.Be4 de4 23.Qa4 Kc7 24.Nc4 Kd7 25.Nb6 Ke8 26.Nc4 Bd5 27.b6 Kf7 28.Ne5 Be5 29.de5 Rh5 30.Rh1 Rh1 31.Rh1 Ke6 32.Bd4 Rc8 33.Qa7 Qb4 34.Qg7 Qf8 35.Qg6 Kd7 36.Rh7 Kd8 37.b7 Rb8 38.Bb6 1–0. rom49szachy – 00qqq1, kurnik, 2012.

5.Nf3 c6 6.g3 cb5 7.ab5 Be7 8.Bg2 d5 9.Nd4 Nbd7 10.0–0 0–0 11.c4 Rc8 (better is 11...Nc5!?=) 12.cd5 Nd5 13.Nc3 Nc5 14.Nd5 Bd5 15.Bd5 Qd5 16.Ra7 Bf6 17.e3 Nd3 18.Qc2?? (better is 18.Bc3=) 18…Rc2–+ (18...Rc2 19.Nc2 Bb2–+) 0–1. wk1234 – 55kotek, kurnik, 2012.

5.Nf3 d5 6.e3 Nbd7 7.Be2 Qe7 8.0–0 0–0–0 9.Ba3 Qe8 10.Bb2 Rg8 11.Ng5 h6 12.Nh3 g5 13.Kh1 g4 14.Ng1 h5 15.d3 e5 16.f3 Bd6 17.Nd2 Qf8 18.a5 Qg7 19.ab6 ab6 20.Ra7 gf3 21.Bf3 e4 22.de4 de4 23.Ne4 Ne4 24.Rb7 Kb7 25.Qd5 Kc8 26.Be4 Nb8 27.Qb7 Kd7 28.Bg7 Rg7 29.Bf5 Ke7 30.Qe4 Kf8 31.Be6 Nd7 32.Qf5 Ne5 33.Nf3 Ng4 34.Ng5 Ne3 35.Nh7 Kg8 36.Bf7 Kh8 37.Qf6 Nf1 38.Qd8 Kh7 39.Bh5 Ne3 40.Bf3 Nc2 41.Qh4 Kg8 42.Qc4 Kh8 43.Qc2 Kg8 44.Qc4 Kf8 45.Qe6 Re7 46.Qf5 Rf7 47.Qg6 Ke7 48.h4 Rf6 49.Qg7 Rf7 50.Qg5 Rf6 51.h5 Bc5 52.h6 Ke6 53.h7 Rf8 54.Qh6 1–0. trutmo – noldoor (1610), kurnik, 2012.

5.Nf3 d6 6.g3 Nbd7 7.Bg2 Qe7 8.0–0 h5 9.Nh4 g5 (better is 9...Bg2 10.Ng2 a5=) 10.Bb7+/– Rb8 11.Bc6 gh4 12.gh4 Ng4 13.h3 Rg8 14.Kh1?? (better is 14.hg4 Qh4 15.Ra3 Rg4 16.Rg3 Rg3 17.fg3 Qg3 18.Bg2+/–) 14...Qh4–+ 15.Bg2 Nf2 16.Rf2 Qf2 17.Qg1 (17.Qf1 Qf1 18.Bf1 Bg7–+) 17...Qe2 18.Nc3 (18.Ra3 d5 19.Re3 Qc4–+) 18...Qd2 19.Qf1 Qc2 20.Rb1 Ne5 (20...d5!? 21.Ba1 Bc5 22.Rc1–+) 21.Be4 Qd2 22.Bh7 Rg3 (better is 22...Rg7 23.Ne4 Qd5 24.Rd1–+) 23.Ne4 Qe3 24.Ng3 Qg3 25.Be5 Qe5 26.Rc1 d5 27.Rc7 Qc7 28.Bd3 Qg3 29.Be2 Bc5 30.Bh5 Ke7 31.Qf7 Kd6 32.Qf1 Rh8 33.Bg4 Qg4 34.Qg2 Rh3 35.Qh3 Qh3# 0–1. wk1234 – valdyval, kurnik, 2012.

5.Nf3 g6 6.g3 Bg7 7.Bg2 0–0 8.0–0 d5 9.e3 Nbd7 10.Qe2 c6 11.Nc3 Qc7 12.Rfb1 Rfc8 13.Nd4 c5 14.Nf3 Ne5?? (better is 14...e5=) 15.Ne5+– Qe5 16.Nd5 Nd5 (16...Qd5 17.Bd5 ed5 18.a5+–) 17.Be5 Be5 18.Ra3 Rc7 19.c4 Nb4 20.Bb7 Rb7 21.f4 Bg7 22.Qf3 Rab8 23.a5 Rd7 24.ab6 ab6 25.Ra8 Ra8 26.Qa8 Bf8 27.Rd1 Nc2 28.Qc6 Rd6 29.Qe4 Nb4 30.d4 Bg7 31.Qa8 Bf8 32.d5 ed5 33.Rd5 Nd5 34.cd5 c4 35.Qc8 Rd5 36.Qc4 Rd2 37.Qc6 Bc5 38.Qc8 Kg7 39.Qe8 Re2 40.Qe5 Kg8 41.Qe8 Kg7 42.h4?? Re3–+ 43.Qb8 Rg3 44.Kh2= Re3 45.Qa7 h5 46.Qa1 Kh7 47.Qf6 Kg8 48.f5 Rf3 49.Kg2 Rf5–/+ 50.Qd8 Kg7 51.Qd7 Rf4 52.Qd3 Rh4 53.Kg3 Rd4 54.Qc3 f6 55.Kf3 g5 56.Kg2 Kg6 57.Qc2 Kh6 58.Qf5 Rf4 59.Qd7 h4 60.Qd3 Kh5 61.Qd1 (61.Qd1 g4 62.Qd5 Kh6 63.Qd2–+). wk1234 – jszkodnik, kurnik, 2012.

5.Nf3 g6 6.g3 Bg7 7.Bg2 d6 8.0–0 Nbd7 9.c4 Nc5 10.Nc3 Nfe4 11.d4 Nc3 12.Bc3 Ne4 13.Qc2 Nf6 14.d5 e5 15.Nh4 0–0 16.a5 ba5 17.Ra5 a6 18.ba6 Ra6 19.Ra6 Ba6 20.Qa4 Qa8 21.Ra1+/– Bb7 22.Qb4 Qc8 23.Ra7 Ba8 24.c5 Bd5 25.Bd5 Nd5 26.Qa3 Nc3 27.Qc3 e4 28.Ng2?? Bc3–+ (28...Bc3 29.c6 Bd4–+) 0–1. wk1234 – mentori77, kurnik, 2012.

3.a4 f6

4.Ra3 g6 5.b5 e5 6.Rd3=.

4.Ra3 g6 5.b5 Bg7 6.h4 h6 7.h5 g5 8.Nc3 e6 9.Qa1 Ne7 10.e3 Nf5 (10...a5 11.Nf3=) 11.Bd3 (11.a5!? ba5 12.Ra5+=) 11...Nh4 (11...Bg2 12.Rh2 Nh4 13.a5+=) 12.Be4 d5 13.Bf3 0–0 14.a5 e5?? (better is 14...a6!?+=) 15.ab6 (15.Rh4!? gh4 16.a6+–) 15...cb6 16.Ra7 Ra7 17.Qa7 Qc8 18.Nd5?? Nf3–+ 19.gf3 Bd5 20.e4 Bf7 21.Bc3 Qc5 22.Ne2 Bc4 23.Ng3 Bb5 24.Nf5 Rf7?? 25.Qb8+= Kh7 26.f4?? Qc4–+ 27.Kd1 ef4 28.Re1= Bd7 29.Nd6 Qe6?? 30.Nf7+/– Qf7 31.Rh1 Qe6 32.f3 Qa2 33.Qb6+– Be8?! 34.Bd4 Qf7 35.Qc5 Bd7 36.e5 fe5 37.Be5 Be5 38.Qe5 Be6 39.d4 Qd7? 40.Qf6 Bf5 41.Re1 Kg8 42.Re7 Qd4 43.Kc1 Qf6–+ 44.Re8 Kf7 45.Rh8 Qh8 46.c3 Qc3 47.Kd1 Qf3 48.Kc1 Qh5 (48...Qh5 49.Kb2 Qe2 50.Kb3 f3 51.Ka4 Qc4 52.Ka3 f2 53.Kb2 f1Q 54.Ka3 Qfc1#; 48...Qc3 49.Kd1 Bg4#) 0–1. xtom – gusto007, kurnik, 2011.

4.Ra3 g6 5.Rg3 Bg7 6.Na3 e6 7.Qa1 Nc6 8.b5 Nb4 9.h4 Nd5 (9...a6!?+=) 10.h5= g5 (10...a6 11.hg6 hg6 12.Rh8 Bh8 13.Rg6+=) 11.h6 (11.e4 Nf4 12.Rg5 Bh6+/–) 11...Nh6 12.e3 (12.e4 Ne7 13.Rg5 Ng6 14.Rh6 Bh6 15.Bf6 Bg5 16.Bd8 Bd8+=) 12...Nf5 13.Rgh3 Nh4 14.g3 Ng6 15.Bg2 h6 (better is 15...c6!? 16.Rh7 Rh7 17.Rh7 Qe7+/–) 16.c4+– Ne3? (better is 16...Ndf4 17.Bb7 Nh3 18.Nh3 Rb8+–) 17.Bb7 Rb8 18.Be4 Nf5 19.f4! gf4 20.gf4 Nf4 21.Rf3 Ng2 22.Kf2 Ngh4+/– 23.Rf4 Ng6 24.Rg4 Ne5 25.Bf5 Ng4 26.Bg4 Ke7 27.Nc2 Qf8 28.a5 ba5 29.Qa5 f5 30.Bf3 Bb2 31.Qa7?? Qf6 32.Qc7 Be5 33.Qc5+= Bd6 34.Qa7 Rhc8 (34...Rhc8 35.Bc6 Bc7=). xtom – gusto007, kurnik, 2011.

4.a5 ba5 5.ba5 c5 6.e3 Nc6 Attacks the isolani on a5 (6...e5!?=) 7.a6+/– Bc8 8.c3 (8.Qh5!? g6 9.Qc5+=) 8...Qb6 9.Ba3 Ba6 (9...e5!?=) 10.Bc5+= Qc5 11.Ba6 e5 12.Bb7 Rb8 13.Bc6 dc6 14.Ne2 Bd6 15.0–0 Ne7 16.Qa4 0–0 17.Qa7 Qa7 18.Ra7 Rb2 19.Ng3 Rfb8 20.Na3 f5?? 21.h3?? f4 22.Ne4 fe3?? 23.Nd6+– ef2 24.Rf2 g6 25.Re7 R2b3 26.Nac4 Rb1 27.Kh2 Re1 28.Ne5 Rbb1 29.Re8 Kg7 30.Rf7 Kh6 31.Ng4 Kg5 32.Re1 h5 33.Re5 Kh4 1–0. aleksandras19 – irlandczyk30, kurnik, 2012.

4.a5 g6 5.ab6 cb6 6.Nf3 Bg7 7.Nd4 Nh6 8.Nb5 a6 9.N5c3 0–0 10.f3 f5 11.Qc1 Nf7 12.Nd1 Ne5 13.d4 Nc4 14.e3 Nb2 15.Qb2 Nc6 16.c3 White prepares the advance b5 16...e5 17.Nd2 ed4 18.cd4 Qe7 19.Bc4 Kh8 20.b5? ab5 21.Bb5? Ra1 22.Qa1 Nb4 23.0–0–/+ Nc2 24.Qb2 Ne3–+ 25.Ne3 Qe3 26.Kh1 Bd4 27.Qb4 Re8 28.Nc4 Qe7 29.Qe7 Re7 30.Nd6 Bc6 31.Bc6 dc6 32.Nc4 b5 33.Na5 c5 34.Nc6 Rd7 35.Rd1 b4 36.Ne5 Rd5 37.Nc6 b3 38.Rd2?? b2 39.Rd1 c4 40.Nd4 Rd4! 41.Rd4 b1Q (41...b1Q 42.Rd1 Qd1#) 0–1. wk1234 – sambaholka18, kurnik, 2012.

4.b5 a6 5.Nc3 ab5 6.ab5 Ra1 7.Qa1 g6 8.Nf3 Bg7 9.g3 Bf3 10.ef3 e6 11.Be2 Ne7 12.0–0 0–0 13.Ne4 Nd5 14.c4 Ne7 (better is 14...Nb4!?+=) 15.Nf6+/– (worse is 15.Bf6 Rf6 16.Nf6 Kf7–/+) 15...Bf6 16.Bf6 c6 17.bc6 Nbc6 18.Rb1 Qc7 19.f4 d6 20.Bf3 e5 21.fe5 de5 22.Be7 Ne7 23.Rb5?? (better is 23.Qc3+–) 23...Rf3–/+ 24.Re5 Rf7 25.Qd4 Nc6?? 26.Re8+– Rf8 27.Qd5?? Kg7–/+ 28.Rf8 Kf8 29.Qf3 Kg7 30.Qc3 Qe5 31.Qb3 Qc5 32.Qc3 Nd4 33.Qe3? Nc2?? 34.Qc3= Nd4 35.Qe3 Kg8?? 36.d3 Kf7 37.Qf4 Nf5?? 38.g4+/– h6? 39.gf5+– Qf5 40.Qc7 Kf6 41.Qb6 Kg5? 42.Qe3 Kh5 43.c5 Qg4 44.Kh1 Qd1 45.Kg2 Qg4 46.Qg3 Qd4 47.Qf3 Kg5 48.Qe3 Qe3 49.fe3 Kf5 50.d4 Ke6 51.Kf3 g5 52.Kg4 1–0. wk1234 – sambaholka18, kurnik, 2012.

4.b5 a6 5.Nc3 ab5 6.ab5 c6 7.Ra8 Ba8 8.Qa1 Bb7 9.Qa7 Qc7 10.Nf3 e6 11.g3 Bb4 12.Bg2 Bc3 13.Bc3 Ne7 (13...cb5? 14.Nd4 Nc6 15.Bc6 dc6 16.Ne6+–) 14.bc6 Nec6 15.Qa3 Ne7 16.0–0 d6 17.Rb1 0–0 18.Qb3 Bf3 19.Bf3 (19.ef3?! Qd7+=) 19...d5 20.Qb6 Qb6 21.Rb6 Nbc6 22.Bb2 Rb8 23.Rb8 Nb8 24.Ba3 Nec6 25.d3 Nd4 26.c4 Nc2? (better is 26...Nbc6+=) 27.Bd6+– dc4 28.Bb8 cd3 29.ed3 Nd4 30.Kg2 e5 31.Be4 Kf7 32.Ba7 Ne6 33.Bh7 g6 34.h4 Kg7 35.Bg6! Kg6 36.Kf3 f5 37.g4 f4 38.Bb8 Nd4 39.Ke4 Nc6 40.Be5 Ne5 41.Ke5 f3 42.Kf4 (42.Kf4 Kf6 43.h5+–) 1–0. wk1234 – brev, kurnik, 2012.

4.b5 a6 5.Nc3 e5 6.g3?? (better is 6.e4=) 6...Bh1–+ 7.f3 Bb4 8.Kf2 (8.Ne4 Bc5 9.Nh3 ab5 10.ab5 Ra1 11.Ba1 d5 12.Nc5 bc5–+) 8...Bc3 9.Bc3 e4 10.Nh3 ef3 11.ef3 Qe7 12.Be2?? Qc5 13.Kf1 ab5 14.ab5 Ra1 15.Qa1 Ne7 16.Bd4 Qd6 17.Kg1 Nf5 18.Be3 Ne3 19.de3 0–0 20.Kh1 c6 21.bc6 Nc6 22.Bc4 Kh8 23.Nf4 Ne5 24.Be2 h6 25.Kg2 Rc8 26.Qc1 Qc6 27.c4 b5 28.c5 Qc5 29.Qb1 g5 30.Nd3? Qc2 31.Qc2 Rc2 32.Kf1 Nd3 33.Bd3 Rh2 34.Bb5 d6 35.Bd7 h5 36.e4 g4! 37.f4 h4 38.gh4 Rh4 39.Kg2–/+ g3 40.Kg3 Rh7 41.Bf5 Rf7 42.Kf3 Re7 43.Ke3 d5 44.Kd4 de4 45.Be4 Re4?? 46.Ke4= Kg7 47.Kf5 Kf7 48.Kg4 Kg6 49.Kf3 f5 50.Ke3 Kf6 51.Kf3 Ke6 52.Kg3 Kf6 53.Kh4 1–0. wk1234 – roger989, kurnik, 2012.

4.b5 c6 5.Nc3 cb5 6.ab5 a6 7.Nf3 a5 8.g3 Bf3 9.ef3 Nh6 10.Bg2 Ra7 11.0–0 Nf5 12.f4 e6 13.g4 Nh4 14.Bh1 Bd6 15.Ne2 0–0 16.Qe1 Bc5 (16...f5!?–/+) 17.d4= Bb4 18.c3 Bd6 19.f3 Ng6 20.Bc1 e5 (20...Qc7 21.Qd2–/+) 21.de5 fe5 22.f5 Nf4 23.Nf4 ef4 24.Qd2 Qg5?? (better is 24...Qc7=) 25.Qd6 Rf6 26.Qb8 Kf7 27.Qa7 g6 28.Qd7 Kg8 29.Qe7 Qh4 30.Bf4 g5 31.Qf6 gf4 32.Qh4 Kg7 33.Rfe1 h6 34.Re7 Kf8 35.Qf6 Kg8 36.Qf7 Kh8 37.Qe8# 1–0. wk1234 – zatyczka28, kurnik, 2012.

4.b5 c6 5.Nf3 Qc7 6.g3 d6 7.Bg2 Nd7 8.Nc3 0–0–0? (better is 8...e5+=) 9.Nd4+– d5 (9...cb5 10.Nd5 Bd5 11.Bd5 ba4 12.Ne6+–) 10.Ne6 Qd6 11.Nd8 Kd8 12.bc6 Bc6 13.Ba3 Qe6 14.h4?? (better is 14.Nb5 Ne5 15.Na7 Ba4 16.Be7 Ne7 17.Ra4+–) 14...d4–/+ 15.Bh3 Qe5 16.f4 Qa5 17.Bd7 Bh1 18.Bb5 dc3?? 19.dc3 Kc8 20.Bb4 Qb4 21.cb4 e5 22.Qd7 Kb8 23.Qd8 Kb7 24.Qf8 Bc6 25.Qg7 Ne7 26.Bc6 (26.Bc6 Kc6 27.Qe7 Re8 28.Qe8 Kd5 29.Rd1 Kc4 30.Qf7 Kb4 31.Qb3 Kc5 32.Qc3#; 26.Qe7 Ka8 27.Bc6 Kb8 28.Qb7#) 1–0. wk1234 – mertys, kurnik, 2012.

4.b5 d5 5.Nf3 e5 6.g3 Bd6 7.Bg2 Ne7 8.d3 0–0 9.Nc3 Nd7 10.Nh4 Nc5 11.0–0 d4 12.Bb7 Nb7 13.Ne4 f5 14.Nd6 Nd6 15.Ba3 Nb7 (15...c5 16.c3+=) 16.e4 f4 (16...fe4!? 17.de4 c5+=) 17.Qg4 Nd6 18.Qe6 Kh8 19.Qe5 Qd7 20.Qd4 c5?? (20...Qe6 21.e5 Ndf5 22.Qf4+–) 21.Qc3 (better is 21.bc6 Nc6 22.Qd6+–) 21...Rae8 22.Rae1 Qg4 Black prepares f3 23.Ng2 f3 24.Ne3 Ng6?? 25.Ng4 Ne5 26.Ne5 Nf7 27.Nf7 Rf7 28.d4 h6 29.dc5 bc5 30.Bc5 1–0. wk1234 – urocerus, kurnik, 2012.

4.b5 e5 5.Nf3 Bc5 6.g3 Bf3 7.ef3 d5 8.Bg2 Ne7 9.0–0 Nd7 10.Qe2 Rb8 11.Nc3 0–0 (11...Bd4 12.f4=) 12.f4 (12.Nd5 Nd5 13.Qc4+/–) 12...e4? (12...Bd4 13.Rfe1=) 13.d3 (better is 13.Nd5!? f5 14.Qc4+–) 13...f5+= 14.de4 fe4 15.Rad1 Nf6 16.h3?? (16.Ne4 Ne4 17.Be4 Qc8+–) 16...d4?? (better is 16...Qc8+=) 17.Ne4+– Ne4 18.Qe4 Ng6 19.Qe6 Kh8 20.Be4 Re8 21.Qd5 Qd5 22.Bd5 Rbd8 23.Bc6 Re2 24.Rc1 Ne7 25.Bf3+– h6?? 26.Be2 Nd5 27.Bc4 Nb4 28.c3 dc3 29.Rc3 Nd3 30.Bd3 Rd6 31.Be4 Rd4 32.Bc2 Rd2 33.Bc1 Re2 34.Bd3 Re6 35.Bc4 Re4 36.Be3 Bd6 37.f3 Re7 38.Kg2 Re8 39.f5 Re7 40.Bf4 Bc5 41.Rd1 Kh7 42.Rcd3 Re8 43.Bc7 Rf8 44.g4 h5 45.Rd7 hg4 46.hg4 Re8 47.Bf4 Rf8 48.Ra7 Rf6 49.Rdd7 Bf8 50.Bc7 Kh6+– 51.Be6 (51.Be6 Ba3 52.Bf4 Kh7 53.Rg7 Kh8 54.Rh7#) 1–0. wk1234 – jozekx, kurnik, 2012.

4.b5 e6 5.Nf3 g6 6.g3 Bg7 7.Bg2 d6 8.0–0 Qe7 9.Nh4 Bg2 10.Ng2 f5 11.Bg7 Qg7 12.Nc3 d5 13.e3 c6 14.Qf3 cb5?? (14...Nf6 15.d4=) 15.ab5?? (better is 15.Nd5 a5 16.Nf6 Nf6 17.Qa8+–) 15...a6 16.Nf4 Ne7? 17.Ne6+– Qf6 18.Nc7 Kf7 19.Na8 Nd7 20.Ra6 Nc5 21.Rb6 Ra8 22.Rf6 Kf6 23.Nd5 Nd5 24.Qd5 Rc8 25.Ra1 Ne6 26.Ra6 Re8 27.b6 Rd8 28.Qa5 Kg5 29.b7 Rb8 30.Re6 Rb7 31.c3 Rb1 32.Kg2 Rb2 33.c4 Rc2 34.Qb5 h5 35.d4 White prepares the advance c5 35...Rd2 36.c5 Kh6 37.c6 Kg7 38.d5 g5 39.Qb7 Kf8 40.Rd6 f4 41.Rd8# 1–0. wk1234 – agacza26, kurnik, 2012.

4.b5 g6 5.Nf3 Bg7 6.g3 e6 7.Bg2 Ne7 8.0–0 0–0 9.Nc3 c6 10.Nd4 e5 11.Nb3 d5 12.bc6 Bc6 13.Ba3 d4 14.Bc6 Nbc6 15.Ne4 Re8 16.Nd6 Rf8 17.c4 f5 18.Nc1 e4 19.Qb3 Kh8 20.c5 bc5 21.Nf7 Rf7 22.Qf7 d3 23.Rb1 de2 24.Ne2 Nd5?? 25.Bc5 Ne5= 26.Qb7 Nf3 27.Kh1 Nd2 28.Rfd1 Nb1 29.Rd5 Qa5?? 30.Qa8 (30.Qa8 Qd8 31.Qd8 Bf8 32.Qf8#; 30.Qb1?! Qa4 31.Qb7 Qe8+–) 1–0. wk1234 – sambaholka18, kurnik, 2012.

4.b5 g6 5.Nf3 Bg7 6.g3 e6 7.Bg2 Ne7 8.0–0 0–0 9.c4 a6 10.Nc3 ab5 11.ab5 Ra1 12.Qa1 e5 13.Nh4 Bg2 14.Ng2 f5 15.f4 e4 16.Nd1 Bb2 17.Qb2 d5 18.d3 ed3 19.ed3 dc4 20.dc4 Qd6 21.Nc3 c6 22.Rd1 Qc5+= 23.Kh1 cb5 24.cb5+= Qc4 25.Rc1 Nd5 26.Ne2 Qe4 27.Qb3 Kg7 28.Re1 Nd7?? 29.Nc3+– Nc3 30.Re4 Ne4+/– 31.Qd5 Rf7 32.Ne3 h6 33.Nc4 Ndc5 34.Nb6 h5 35.Qe5 Kh7 36.Nd5 Nd3 37.Qe6 Ra7 38.Kg2 Ra2? 39.Kf3 Rf2 40.Ke3+– Ndc5 41.Qe7 Kh6 42.Qf8 Kh7 43.Nf6 Nf6+– 44.Kf2 Nfe4 45.Kf3 Nd3 46.b6 Ndc5 47.Qe7 Kg8 48.b7 Nb7 49.Qb7 Nd2 50.Ke3 (50.Ke3 Ne4 51.Qd7+–) 1–0. wk1234 – sambaholka18, kurnik, 2012.

4.b5 g6 5.Nf3 Bg7 6.g3 e6 7.Bg2 Ne7 8.0–0 0–0 9.c4 a6 10.Nc3 ab5 11.ab5 Ra1 12.Qa1 Nf5 13.Qa7 Qc8 14.e4 Ne7 15.Nd4 (better is 15.d4!?+/–) 15...f5= 16.Nde2 fe4 17.Rb1 Nf5 (better is 17...d5!?–/+) 18.Ne4= Bb2 19.Rb2 Be4 20.Be4 Qd8 21.Nf4 Rf7 22.Nd3 Nd4 23.Ne5= Rf8 24.d3 d6 25.Nc6 Nbc6 26.bc6 Rf7 27.f4 Qf6 28.Qb8 Kg7 29.Rf2 g5 30.Qa7 gf4 31.Rf4?? Ne2–+ 32.Kg2 Nf4 33.gf4 Qf4 34.Qa1 e5 35.Qb2 Qf1 36.Kg3–+ h5 37.Qg2 Qf4 38.Kh3 Kf8 39.Bg6 Rg7 40.Qe4 Qg4! 41.Qg4 hg4 42.Kg4 Rg6 43.Kf5 Rg2 44.h4 Kg7 45.h5 Kh6 46.Ke6 Kh5 47.Kd7 Rg7 48.Ke6 Kg5 49.Kd5 Kf4 50.d4 ed4 51.Kd4 Kf5 52.Kd5 Kf6 53.Ke4 Rg5 54.Kf4 Rc5 55.Ke4 Rc4 56.Kd3 Rc6 57.Kd4 Rc5 (57...Rc5 58.Kd3 b5 59.Ke3 b4 60.Kf2 b3 61.Kg3 b2 62.Kf3 Rc3 63.Kf2 b1Q 64.Ke2 Qb2 65.Kd1 Rc1#) 0–1. wk1234 – sambaholka18, kurnik, 2012.

4.b5 g6 5.Nf3 Bg7 6.g3 e6 7.Bg2 Ne7 8.0–0 0–0 9.c4 c6 10.Qb3 cb5 11.ab5 Nf5 12.Nd4 Bg2 13.Kg2 Nd4 14.Bd4 d5 15.cd5 ed5? (better is 15...e5!? 16.d6 Kh8+/–) 16.Nc3 f5 17.Bg7 Kg7 18.Nd5 Nd7 19.Qc3 Kg8 20.Rfc1 Nc5 21.Qe5 Re8? (better is 21...Rf7 22.Rc4 Nd7+–) 22.Nf6 Kf7 23.Ne8 Qe8 24.Qe8 Re8 25.Ra7 Kf6 26.d4 Ne4 27.f3 Nd2 28.Rc6 Kg5 29.Kf2 Nb3 30.d5 Nd4 31.Ra2 Nb5 32.Rb6 Nd4 33.d6 Rd8 34.Rd2 Ne6 35.d7 Nc5 36.Rdd6 Kh5 37.Rbc6 Nb7 38.Rd3 Kg5 39.Rc8 Kf6 40.Rd8 Nd8 41.e4 fe4 42.fe4 Ke7 43.e5 Ne6 44.Kf3 Kd8 45.Ke4 Nc5 46.Kd4 Nd3 47.Kd3 Kd7 48.Ke4 Ke6 49.h4 h5 50.Kf4 Kf7 51.g4 hg4 52.Kg4 Ke6 53.Kf4 Kd5 54.Kg5 Ke5 55.Kg6 1–0. wk1234 – sambaholka18, kurnik, 2012.

4.b5 Nh6 5.Nf3 e6 6.g3 g5 7.Bg2 g4 8.Nh4 Bg2 9.Ng2 Rg8 10.e3 f5 11.Nf4 Nf7 12.Nh5 Rg6 13.Nf4 Rg8 14.h3 e5 15.Nh5 Be7 16.hg4 fg4 17.Nc3 Ng5?? (17...a6 18.f4=) 18.Nd5?? (better is 18.Qg4 Rg6 19.f4+–) 18...Nf3+= 19.Kf1 d6?? 20.Ne7?? Qe7+= 21.d4 Nd7 22.de5 Nde5 23.Qd5 0–0–0 24.Be5 Qe5 25.Qe5 Ne5 26.Nf6+= Rgf8 27.Nh7 Rh8 28.f4 gf3+= 29.Kf2 1–0. wk1234 – mentori1111, kurnik, 2012.

4.d3 g6 5.e4 Bg7 6.Nf3 Nc6 7.b5 Nb8 8.Be2 Nh6 9.0–0 0–0 10.e5 f5 11.Ng5 e6 12.h4 1–0. arti000 – mehmet22, kurnik, 2012.

4.e3 e5 5.Nf3 Bb4–/+ 6.Bc4 Ne7 7.0–0 d5 8.Bb3 c6 9.Nh4 Bc8 10.Qh5 Kd7?? 11.f4?? Qe8 12.Qe2 Kc7 13.fe5+= fe5 14.Be5+/– Kb7 15.a5 b5? 16.Bb8?? Kb8 17.c3 Bc5 18.d4 Bd6 19.Nd2 g5=+ 20.Nhf3 Qh5 21.Qd3 Bg4 22.Ne5?? Be5 23.de5 Bf5?? 24.e4 Be6 25.ed5 Nd5 26.Bd5+– Bd5 27.Ne4 Qg4+/– 28.Rae1 Kc7 (29.Rf7 Kd8+–; 28...Rd8!?+/–). xtrachess – chaser, Live Game Caissa's Web, 2006.

4.Nf3 e5 5.b5 d5 6.g3 Nd7 7.Bg2 Bd6 8.e3 Qe7 9.d4 e4 10.Nfd2 h5 11.0–0 g5 12.f3 ef3 13.Nf3 (13.Qf3 h4 14.g4+=) 13...Qe3?? (13...h4 14.Qe1–/+) 14.Rf2?? (better is 14.Kh1 Bg3 15.hg3+–) 14...0–0–0= 15.Bc1 Qe7 16.Re2 Qf7 17.Rf2 Re8 18.Ng5+= Qg6 19.Nf3 Nh6 20.Nh4 Qf7 21.Nc3 Ng4 22.Rf3 Rhg8 23.h3 f5? 24.hg4 hg4 25.Rf5 Qg7 26.Nd5?? Rh8?? 27.Bg5 Bg3 28.Qg4 Bh4+= 29.Raf1 Bd5 30.Bd5 Bg5 31.Rg5 Qe7 32.Rg7 Qe3 33.Rf2 Qe1 34.Kg2?? Rh2!!–+ 35.Kh2 Qf2 36.Qg2 Rh8 37.Rh7 Rh7# 0–1. wk1234 – niepokonany48, kurnik, 2012.

4.Nf3 g6 5.g3 Bg7 6.Bg2 e6 7.0–0 Ne7 8.Nd4 Bg2 9.Kg2 0–0 10.e3 a6 11.Qf3 Nbc6 12.Nc6 Nc6 13.b5 ab5 14.ab5 Ra1 15.Ba1 Nb4 16.c3 Nd5 17.e4 Ne7 18.d4 f5 19.e5 Nd5 20.Nd2 g5 Black intends f4 21.Nc4 h6 22.Ne3 Ne7 23.Rb1 Ng6 24.Nc4 f4 25.g4?? (better is 25.Qd3 Ne7 26.g4=) 25...Nh4–+ 26.Kf1 Nf3 27.Nd2 Nd2 28.Kg2 Nb1 29.d5 Be5 30.c4 Ba1 31.c5 bc5 (31...bc5 32.b6 Qa8 33.h4 Qd5 34.Kh2 gh4 35.f3 Qd2 36.Kg1 Bd4 37.Kh1 h3 38.bc7 Qg2#) 0–1. wk1234 – sambaholka18, kurnik, 2012.

4.Nf3 g6 5.g3 Bg7 6.Bg2 Nh6 7.0–0 0–0 8.b5 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 d6 12.Qa7 Qc8 13.Ra1 c6 14.bc6 Nc6 15.Qb6 Nf5 16.Nd5 Rd8 17.Nd4 Ncd4 18.Bd4 Nd4?? (better is 18...Rd7+–) 19.Ne7 (19.Qd4?! Bd5 20.Bd5 Kh8+–) 19...Kf7 (19...Kh8 20.Nc8 Ne2 21.Kh1 Bg2 22.Kg2 Rc8+–) 20.Nc8 Ne2 21.Kh1 Bg2 22.Kg2 Rc8 23.Qb7 Ke6 24.Qc8 Ke5 25.Ra7 Bh6 26.Qe8 Kd5 27.Qe2 Kc6 28.Ra6 Kd7 29.Qd3 Bf8 30.c4 Ke6 31.Qd5 Ke7 32.Ra7 Ke8 33.Qe6 Kd8 34.Qd7# 1–0. wk1234 – miki130271, kurnik, 2012.

4.h3 e5 5.e3 (5.b5!?+=) 5...Bb4–/+ 6.Nf3 Bd6 7.Be2 Qe7 8.0–0 Nc6 9.d4 e4 10.Nh4 g6 11.d5 Ne5 12.Nc3 f5 13.Nb5? (better is 13.g3–/+) 13...a6?? (better is 13...Qh4 14.a5 Qf6–+) 14.Be5 Be5–/+ 15.f4?? Ba1 16.Nc7 Kd8 17.Na8 Bg7 18.Nb6 Qh4 19.Bc4 Ne7 20.d6–/+ Nc6 21.Bd5 g5 22.fg5? Qg5 23.Bc6? Bc6 24.Qe2 Rg8 25.Qa6 Qe3 26.Kh1 Ke8 27.Qc8?? Kf7–+ 28.Rf5 Kg6?? 29.Qg8+= Qb6?? 30.Qf7 Kh6 31.Rh5# (31.Qh5#) 1–0. aleksandras19 – buru68, kurnik, 2012.

3.a4 Nf6

4.Ra3 a5 5.Rg3? (better is 5.b5+=) 5...ab4–+ 6.c3 e6 (6...Bc6!?–+) 7.cb4–/+ Nc6 8.b5 Na5 9.Na3 g6 10.Qa1 Nb3?? (better is 10...Bg7–/+) 11.Rb3+– (11.Bf6? Na1 12.Bd8 Kd8–+) 11...Be7 12.h4 (12.Nc4 h6+–) 12...0–0 13.h5! Ra4 14.hg6 fg6 15.Rbh3 h5 16.Rg3 Kh7 17.Nf3 Bf3? 18.gf3 Qa8 19.f4 Ba3?? 20.Ba3?? Ra3?? 21.Qa3+– Qa3 22.Ra3 Nd5 23.e3 Nb4 24.Ra4 Nd5 25.Bd3 Kg7 26.Ra7 Rc8 27.Rh4 Nb4 28.Ke2 Nd3 29.Kd3 d6 30.Kd4 1–0. xtom – krzysztofkm (1655), kurnik, 2012.

4.Ra3 Nc6 5.b5 Na5 6.e3 g6 (6...Nc4 7.Rb3+=) 7.Nf3= Bg7 8.h4 e6 9.Nc3 Qe7 10.Qa1 0–0–0 11.Ne2 (11.Be2 h6+=) 11...Nc4–/+ 12.Ned4 (12.Ra2 Nb2 13.Rb2 Bf3 14.gf3 Ne8=) 12...Nb2 (better is 12...Na3!? 13.Ba3 d6–+) 13.Qb2–/+ Nh5 (13...e5 14.Ne2+=) 14.a5+= c6 (better is 14...e5 15.Nb3 Bf3 16.ab6 ab6 17.gf3 d5=) 15.ab6+/– ab6 16.Qa2 (16.bc6!? dc6 17.Ra7+/–) 16...c5+= 17.Ne2 d5 18.Nc3 Kd7 19.Ra7 Rb8 20.Na4 Qd6= 21.Be2 Rhc8 22.Ng5+= Nf6 23.h5 Qe7?? 24.h6 Nh5 25.Nb6 Kc7 26.Nc8 Kc8 27.Ne6 Qe6 28.Bh5 gh5 29.hg7 Qg6 30.Qb2 Qg2 31.Rf1 Kc7 32.Qe5 Kb6 33.Qb8 Qg7 34.Qb7# 1–0. xtom – slavisko (1615), kurnik, 2011.

4.a5 ba5 5.Ra5 a6 6.Na3 g6 7.Qa1 Bg7 8.h4 c5 9.Rc5 d6 10.Rc3 Nc6 11.Rb3 0–0 12.b5 (12.h5!?+=) 12...ab5+= 13.Rb5 Ba6 14.Rg5 h6 15.Rg3 Qb6 16.Rb3 Qa5 17.Bc3 Qc7 18.Nf3 Rfb8 19.g4 Rb3 20.cb3 Ne8 21.e3?? (better is 21.Bg2 Bb7 22.Bg7 Ng7 23.Qb2=) 21...Bf1–+ 22.Kf1 Qa7 23.Bg7+= Ng7 24.Qc3 Qa3 25.Qc6 Qa6 26.Qa6+/– Ra6 27.Ke2 Ne6 28.g5 hg5 29.Ng5 Nc5 30.b4 Nd7 31.Ne4 Rb6 32.Rb1 Kg7 33.d4 e6 34.Kd3 f5 35.Ng5 Kf6 36.f4 e5 37.d5 Rb5 38.Kc4 Rb8 39.Nh7 Kg7= 40.Ng5 Nb6 41.Kb5 Nd5 42.Kc6 Ne3 43.fe5 de5 44.Ne6? Kf6 45.Nc7 White intends b5 45...f4 46.b5 White prepares the advance b6 46...f3 47.b6 f2 48.Nd5 Nd5 49.Kd5 Rb6?? 50.Rf1?? Rb2–+ 51.Ke4 g5 52.h5 g4 53.h6 Kg6 54.Ke5 g3 55.Kf4 g2 56.Rf2 Rf2 57.Kg3 g1Q 58.Kh3 Rh2 0–1. xtom – cypisek1969 (1890), kurnik, 2011.

4.a5 e6 5.ab6 ab6 6.Ra8 Ba8 7.b5=.

4.a5 g6 5.b5 ba5 6.Ra5 c6 7.Bc3 cb5 8.e3 (8.Rb5 Bc6 9.Bf6 ef6=) 8...Bg7 (8...a6 9.Bf6 ef6 10.Ra1–/+) 9.Rb5+= Bc6 (9...Ba6 10.Rb2+=) 10.Rb2= 0–0 11.Bd3?? (better is 11.Nf3=) 11...Bg2–+ 12.h4 Bh1 13.f3 d5 14.Kf2 Qd6 15.f4 Nh5 16.Nh3 Bc3 17.Nc3 Be4! 18.Ne4 de4 19.Be4 e5 20.f5?? Nc6 21.Ng5 Nd4! 22.Ba8 Ra8 23.Rb7 Rf8 24.e4 Nf4 25.d3 h6 26.Nf3 Nf3 27.Kf3 Qd4 28.h5 Nh5 29.Qh1 Kg7 30.fg6 Kg6 31.Qg2 Kh7 32.Qg4 Nf4 33.Qf5 Kg7 34.Re7 Qc3 35.Re5 Ng6 36.Qg4 Qe5 (36...Qe5 37.Qg3 Qg3 38.Kg3 a5–+) 0–1. dtpwaldi – nebihu (1645), kurnik, 2012.

4.b5 a5 5.Ra3 g6 6.h4 c5 7.h5 gh5 8.Rah3 d5 9.e3 Nbd7 10.Na3 Qc7 11.Qa1 0–0–0 (11...Rg8 12.Ne2–/+) 12.Be2 e5 13.Bh5 d4 14.Bf7 Bg2 15.Nc4 Bh1 16.Rh1 Be7 17.Rh6 Rdf8 18.Be6 Ne4?? (better is 18...Kb8+=) 19.Bd7 Kd7+/– 20.Nb6 Kd8?? 21.f3?? Nd6 22.Nd5= Qb7 23.Ne7 Qe7 24.e4?? Rf6 25.Rh2?? Qg7 26.Ne2 Rf3 27.Qa2 c4 28.d3 Rhf8 29.dc4 Qg5 30.Rh1 Ne4 31.Bc1 Qg2 32.Rg1 Rf1 33.Rf1 Rf1 (33...Qf1?!=) 0–1. xtom – cypisek1969 (1880), kurnik, 2011.

4.b5 a5 5.Nf3 c6 6.g3 cb5 7.ab5 d6 8.Bg2 Nbd7 9.Nc3 e5 10.0–0 Be7 11.e4 0–0 (worse is 11...Be4 12.Ne4 Ne4 13.Ne5 de5 14.Be4+/–) 12.d3 Nc5 13.Na4 Na4 14.Ra4 Qd7 15.c4 Rac8 16.Qd2 Rfd8 17.Rd1 Ng4 18.h3 Nh6 19.h4 f6 20.Bh3?? (20.Qe3 Qc7+/–) 20...f5 (20...Qh3 21.Qe3 Rb8 22.Re1–+) 21.ef5?? Nf5?? 22.d4?? Bf3–+ 23.Re1 Qc7 24.d5?? g6?? 25.Bf5? gf5–+ 26.Qh6? Bf8 27.Qe6 Qf7 28.Qf7 Kf7 29.Re3 Bg4 30.f3 Bh5 31.g4 fg4 32.fg4 Bg4 33.Ra1 h5 34.Rf1 Kg6 35.Ree1 Be7 36.Rc1 Bh4 37.Kh2 Rf8 38.Rg1 Rf2 39.Rg2 Rcf8 40.Ba3 Rg2 41.Kg2 Rf2 42.Kg1 Rf3 43.Bd6 Bf2 44.Kg2 h4 45.Be5 h3 46.Kh1 Be3 47.Rg1 Kf5 48.Bh2 Bg1 49.Bg1 Rf1 50.Kh2 Rc1 51.Bb6 Rc4 52.Ba5 Kf4 53.b6 Rc8 54.d6 Rb8 55.Bb4 Rb6 56.Bc5 Rc6 57.Ba3 Rc2 58.Kg1 Kf3 59.Bc5 h2 60.Kh1 Kg3 (60...Kg3 61.Bf2 Rf2 62.d7 Bf3#) 0–1. wk1234 – drakolas, kurnik, 2012.

4.b5 a5 5.Nf3 g6 6.g3 Bg7 7.Bg2 d6 8.0–0 Nbd7 9.Ng5 e6?? (better is 9...Bg2 10.Kg2 0–0=) 10.Bb7+– Rb8 11.Bg2 0–0 12.Nf3 e5 13.d4 e4 14.Ng5 d5 15.c4! Ng4 16.cd5 Qg5 17.h4 Qd5+= 18.f3?? ef3?? 19.Bf3? Qe6?? 20.d5?? Qf5 21.Bg7?? Kg7+= 22.Qd4 Ndf6?? 23.Bg4+– Qg4 24.Qf6 Kg8 25.Nc3 Rbc8?? 26.Kh2 Rfe8 27.Qf7 Kh8 28.Qf6 Kg8 29.Rf4 Qd7 30.e4 Rf8 31.Qe5 Rce8 32.Rf8 Kf8 33.Rf1 Kg8 34.Qd4 Rf8 35.Rf8 Kf8 36.e5 Kg8 37.e6 Qe7 38.Ne4 Qa3 39.e7! Kf7 40.Qf6 Ke8 41.d6 cd6 42.Nd6 Kd7 43.e8Q (43.e8Q Kc7 44.Qc8#) 1–0. wk1234 – freddy109, kurnik, 2012.

4.b5 a5 5.Nf3 g6 6.g3 Bg7 7.Bg2 Nh5 8.Bg7 Ng7 9.0–0 d6 10.c4 Nd7 11.Qc2 Nc5 12.Qc3 e5 13.d4 ed4 14.Qd4 Rg8 15.Nc3 Nb3 16.Qe3 Qe7 17.Qe7 Ke7 18.Rab1 Nc5 19.Nd4 Bg2 20.Kg2 Nge6 21.Nc6 Kd7 22.f3 Rge8 23.Nd5 Ng5?? 24.Nf6+– Ke6 25.Ne8 Re8 26.e4 Nd3?? 27.Rb2 Ne5?? 28.Ne5+– Ke5 29.f4 Kf6 30.fg5 Kg5 31.Rf7 Rc8 32.h4 Kh6 33.Rbf2 c6 34.bc6 Rc6 35.Rd7 Rc4 36.Rff7 Rc2 37.Kh3 Rc5 38.Rh7# 1–0. wk1234 – freddy109, kurnik, 2012.

4.b5 a6 5.c4 d5 (5...e6 6.e3=+) 6.e3 (6.cd5 Nd5 7.ba6 Na6=) 6...ab5 (better 6...dc4 7.Na3 e5=+) 7.Nf3? (7.cb5!? e6 8.Nf3=) 7...ba4 (better 7...bc4!? 8.d3 cd3 9.Bd3 Nbd7–+) 8.Ra4–/+ Ra4 9.Qa4 Nbd7 (9...Bc6 10.Qb3–/+) 10.Be2 e6 11.0–0 Be7 (11...dc4 12.Nc3=+) 12.d4 (12.cd5 Bd5 13.Nc3 Bb7=+) 12...0–0 13.Nc3 Re8 (13...dc4 14.Qc4 c5 15.Rd1–/+) 14.Qc2 (14.cd5 ed5 (14...Nd5?! 15.Nd5 Bd5 16.Bb5=) 15.Qb3 Qb8=+) 14...Nf8 (14...dc4 15.Bc4 Bf3 16.gf3–/+) 15.Ne5=+ c5 (15...N6d7 16.Nd7 Qd7 17.cd5 ed5 18.Ra1=+) 16.cd5= ed5 (better 16...cd4 17.ed4 Qd6 18.de6 Ne6= (worse 18...Qe6 19.Bc4 Nd5 20.Ra1+–)) 17.Nb1 (better 17.Bb5!?+=) 17...Ng6 (17...Bd6 18.Bb5 Re7 19.Nd2–/+) 18.Nd3 (better 18.Bb5!? Rf8 19.Nd2=+) 18...c4–+ 19.Ne5 Ne5 (19...b5!? 20.Nd2–+) 20.de5–/+ Nd7 21.Bd4 (21.Rd1 Bb4–/+) 21...Bc5 22.Qb2 (22.f4 b5–+) 22...Qe7–+ 23.f4 (better 23.Nc3–+) 23...g6 (23...f6!?–+) 24.Nd2 (24.Bg4 f6 25.e6 Nf8–/+) 24...Ra8 (24...f6 25.Nf3–/+) 25.Rb1 (25.Bf3 Rc8–/+) 25...Qd8 (25...Ra3 26.Nf1–/+) 26.Nf3 Qc7 27.Ng5 Bd4 28.ed4 c3 (28...h6 29.Nh3=+) 29.Qc2= Rc8 (29...Nf8!?=) 30.Bg4+= White plans e6 30...Ba6 31.e6 Nf6?? (better 31...fe6 32.Be6 Kg7+=) 32.ef7+– Kg7 33.Bc8 (better 33.Ne6 Kf7 34.Nc7 Rc7 35.Bf3+–) 33...Bc8 34.Rc1 (34.Re1 Ne4 35.Ne4 de4 36.Qe4 Qf7 37.Qe5 Kg8 38.Qe8 Qf8+–) 34...h6? (better 34...Qf4!? 35.Qc3 Bf5+–) 35.Qc3 Qc3 36.Rc3 Be6 (36...Bg4 37.Rc6 Nd7 38.Ne6 Be6 39.Re6 Kf7+–) 37.Ne6 Kf7 38.Nc7 Ne4 (38...Ke7 39.Rc6+–) 39.Rc6 (39.Rc6 b5 40.Nb5+–) 1–0. BeepBeepImAJeep (2580) – Bobby_The_Greatest (2020), lichess.org, 2016.

4.b5 a6 5.e3 ab5 6.ab5 Ra1 7.Ba1 g6 8.Nf3 Bg7 9.c4 0–0 10.Be2 c6 11.0–0 cb5 12.cb5 d6 13.d4 (13.Bf6 Bf6 14.d4 Re8=) 13...Nbd7 (13...e6 14.Qd3=) 14.Nbd2 Qa8 15.Bb2 (15.Re1 Rc8=) 15...Ne4 16.Ne4 Be4 17.Qb3 Bd5 18.Qc2 Rc8 19.Qd2 Be4 (19...Nf6 20.Ra1 Qb7 21.Qd3=) 20.Ra1 Qb7 21.Rc1 (21.Ne1 d5+=) 21...Rc1 22.Qc1 h6 23.Ne1 Bd5 24.f3 f5 (24...Bb3 25.Qc3 Nc5 26.Nd3+=) 25.Bc4 (25.Nd3 Kh7+=) 25...Nf6= 26.Qc2 (26.Nd3 Bc4 27.Qc4 Qd5=) 26...Kh7 27.Qb3 (27.Qd3 Bc4 28.Qc4 Qd5 29.Qd5 Nd5=+) 27...Bc4 28.Qc4 Qd5 29.Qd5 Nd5 30.Kf2 (30.Nc2 e6–/+) 30...Nc7 31.Nd3 Nb5 32.Nb4 Nc7 (32...e6 33.Nc6–/+) 33.Ke2 e5 (33...Kg8 34.Kd3–/+) 34.Kd3 (34.de5 de5 35.e4 Ne6–/+) 34...b5 35.Bc3 Kg8 36.de5 Be5 (36...de5!? 37.e4 Ne6–/+) 37.Be5= de5 38.e4? (better 38.Nc6=) 38...Kf7–/+ 39.h3 Ke6 40.Nc6 fe4 (better 40...f4!?–/+) 41.Ke4=+ Ne8 42.Ne5 Nd6 43.Kd4 Nf5 44.Ke4 Nd6 (better 44...Ng3 45.Kd4 Ne2 46.Ke4 g5=+) 45.Kf4?? (better 45.Kd4 Nf5 46.Ke4=+) 45...g5–+ 46.Ke3 Ke5 47.g3 (47.Kf2 Nf5–+) 47...b4 (better 47...Nf5 48.Kd3–+) 48.f4 gf4 49.gf4 Kf5 50.Kf3 (50.Kd3 Nc4 51.Kc2 Ne3 52.Kc1 Kf4–+) 50...Ne4 (better 50...b3 51.Ke3 b2 52.Kd4–+) 51.Ke3 (51.Ke2 Kf4 52.Kd1 Kg3–+) 51...Nf6 (better 51...b3 52.Kd3–+) 52.Kd4 (52.h4 Nd5 53.Kd3 Kf4–+) 52...Kf4 53.Kc4 Kg3 54.Kb4 Kh3 55.Kc4 Kg2 56.Kd3 h5 57.Ke3 h4 58.Kf4 h3 59.Kg5 h2 (59...Nd5 60.Kf5–+) 60.Kg6 (60.Kf6 h1Q–+) 60...h1Q (better 60...Ne4–+) 61.Kf7 (61.Kf6 Qh8 62.Kf5–+) 61...Ne4 62.Ke6 (62.Ke7 Qh6 63.Kf7 Qf6 64.Ke8 Qe6 65.Kd8 Nf6 66.Kc7 Nd5 67.Kd8 Qd6 68.Ke8 Qe7) 62...Qh5 63.Kd7 Qe5 64.Kc6 Qd6 65.Kb5 Qc7 (65...Qc5 66.Ka4 Qc4 67.Ka3 Nc5 68.Kb2 Nd3 69.Ka3 Qc3 70.Ka4 Qb4) 66.Kb4 Kf3 (66...Qc5 67.Kb3 Qb5 68.Kc2 Qc4 69.Kb2 Nc5 70.Kb1 Qb3 71.Kc1 Qc3 72.Kd1 Ne4 73.Ke2 Qd2) 67.Kb3 Ke3 (67...Nd2 68.Kb2 Qb6 69.Kc3 Ke3 70.Kc2 Qb3 71.Kc1 Qb1) 68.Kb2 (68.Kb4 Qb6 69.Kc4 Qa5 70.Kb3 Nd2 71.Kb2 Qb5 72.Ka2 Qb3 73.Ka1 Qa3) 68...Kd4 (68...Qc3 69.Ka2 Nc5 70.Kb1 Nd3 71.Ka2 Qb2) 69.Kb3 Qc4 (69...Nc5 70.Ka3 Kc3 71.Ka2 Qh2 72.Ka3 Qb2) 70.Kb2 Qc3 71.Kb1 (71.Ka2 Qb4 72.Ka1 Kc3 73.Ka2 Qb2) 71...Qd2 72.Ka1 Kc3 73.Kb1 Qb2 0–1. BeepBeepImAJeep (2765) – chessmaster3000 (2365), lichess.org, 2016.

4.b5 c6 5.e3 cb5 (5...e6 6.Nf3=) 6.ab5 e6 7.Nf3 Be7 8.c4 (8.Be2 0–0=) 8...0–0 9.Be2 d5 10.0–0 dc4 11.Bc4 Nbd7 (11...Bd6 12.Qe2=) 12.d4 Rc8 (12...Qc7 13.Bd3+=) 13.Nbd2 (13.Be2 Rc7+=) 13...Ra8 (13...Bf3!? 14.gf3 Bb4=) 14.Be2 (14.Ba3 Nb8+=) 14...Nb8 15.Nc4 (15.Ba3 a6+=) 15...Nd5 16.Nfe5 (16.Qb1 a5+=) 16...Nd7 (16...f6 17.Nf3=) 17.Nc6+= Qe8 (17...Bc6 18.bc6 Nb8 19.e4=) 18.Ne7+– Qe7 19.Ba3 Qf6? (better 19...Qg5!? 20.h4! Qh4 21.Bf8 Nf8+–) 20.Bf8+– Nf8 21.Nd6 Bc8 (21...Nc3 22.Qd3 Ne2 23.Qe2+–) 22.Nc8 Rc8 23.Ra7 Ng6 24.Bf3 Nc3 (24...Qg5 25.Qa4+–) 25.Qd3 Nh4 (25...Qd8 26.Bb7 Ne5 A) worse 27.de5 Qd3 28.Bc8 Ne2 29.Kh1 Ng3 30.hg3 Qf1 31.Kh2 h6–/+ (31...Qb5? 32.Ra8 Qe8 33.Bb7 Qa8 34.Ba8+–; 31...Qf2?! 32.Ra8 h5 33.Be6 Kh7 34.Bd5–+); B) 27.Qc2 Nb5 28.Qc8 Qc8 29.Bc8 Na7 30.de5 Nc8 31.Rd1+–) 26.Bc6 (26.Bb7 Nb5 27.Qb5 Rf8+–) 26...Qg5 (26...Nd5 27.Rfa1 Rd8 28.Ra8+–) 27.g3 (better 27.Qc3 Ng6 28.Rfa1+–) 27...Nd5 28.f4 Qg4 29.Bd5 (better 29.e4!? Nb4 30.Qa3 Nc6 31.bc6 Qe2 32.gh4 Qe4+–) 29...ed5 30.Qd1 Qg6 (30...Qd1 31.Rd1 Nf5 32.Rd7+–) 31.Qb1 (31.Qb3 Nf5 32.Qd5 Ng3+–) 31...Qg4 (31...Nf5 32.Rc1 Re8 33.Rc3+–) 32.Rc1 (32.Qa2 Nf3 33.Kh1 Qh3+–) 32...Nf3 (32...Rc1 33.Qc1 g6 34.Qc2+–) 33.Kf2 Rf8 (33...Re8 34.Qb3 Nh2 35.Qd5+–) 34.h3! Qh5 (34...Qh3 Theme: Deflection from f3 35.Kf3) 35.Rcc7 (better 35.Qa2 g6 36.Kg2+–) 35...Nd2 36.Qh1 Ne4 37.Ke1 Ng3 Threatening mate... how? 38.Qg2 Nf5 39.Qg4 (39.Qd5?! Qh3 40.Qe4 Ne3+=) 39...Qg4 40.hg4 Ne3 41.g5 (41.Rcb7 Ng4 42.Rb6 Re8 43.Kd2 Ne3+–) 41...Nf5+– 42.Rab7 Nd4 43.Rb6 Re8 44.Kd2 Ne6?! (44...h6 45.gh6 gh6+–) 45.Kd3 (better 45.Re6 fe6 46.b6+–) 45...Nf4 (better 45...Nc7 46.f5 Rd8–+) 46.Kd4 Ne6 47.Kd5?? (better 47.Re6 fe6 48.b6 e5 49.Kd5 Rd8 50.Ke4+–) 47...Nc7–+ 48.Kc6 Ne6 49.Kd7 (49.Ra6 Ng5 50.b6 f5–+) 49...Rd8 (49...Kf8 50.Rd6–+) 50.Ke7 g6 (50...Rf8 51.g6 hg6 52.Kd6–+) 51.Kf6?? (better 51.Re6 Rd5 52.Rb6 Rg5 53.Rb8 Kg7 54.Kd6–/+) 51...Rd5 (better 51...Re8 52.Ke5–+) 52.Rb7 (52.Rb8 Nf8 53.b6–+) 52...Rg5 (better 52...Nd8 53.Rb8 Kf8 54.Rd8 Rd8 55.Ke5–+) 53.Ke7 (better 53.Rb8 Nf8 54.Kg5+–) 53...Kg7 54.Rb8 (54.Kd6 Rg1–+) 54...Kh6 (better 54...Nd4 55.Kd7 Rb5 56.Rc8–+) 55.Rb7 (55.Kf7 Nc5–+) 55...Re5 (55...Nc5 56.Rc7–+) 56.Kf6 (56.Kd6 Rf5–+) 56...Re3 57.Kf7 (57.Rb8 Nd4 58.Kf7 Rb3–+) 57...Nf4 (57...Nd8 58.Kf8 Nb7 59.Kf7 Re5 60.b6 Re1 61.Kf6 Nd8 62.b7 Re6) 58.Kf6 (58.Kg8 Re8 59.Kf7 Rc8–+) 58...Nh5 (58...Nd5!? 59.Kf7–+) 59.Kf7 Rf3 60.Kg8 (60.Ke7 g5 61.b6 g4–+) 60...Kg5 (60...g5 61.b6 Nf6 62.Kf7 g4–+) 61.Rh7 (61.Kh7 Rh3 62.Re7 Kf6–+) 61...Kh4 (61...Nf6 62.Kg7 Nh7 63.b6 Nf8 64.b7 Ne6 65.Kh7 Rf7 66.Kg8 Rg7 67.Kh8 Rb7 68.Kg8 Kh6 69.Kh8 Rb8) 62.Rh5 (62.b6–+) 62...Kh5 63.b6 g5 64.b7 g4 (64...Rb3 65.b8Q Rb8 66.Kf7–+) 65.Kg7?? (65.b8Q g3+–) 65...g3 (65...Rb3 66.b8Q Rb8 67.Kf7 g3 68.Ke6 g2 69.Ke7 g1Q 70.Kd6 Qd4 71.Kc7 Qb6 72.Kd7 Rb7 73.Ke8 Qe6 74.Kd8 Qd7) 66.Kh7?? (better 66.b8Q+–) 66...g2 (66...Rf7 67.Kg8 Rb7 68.Kf8 g2 69.Ke8 g1Q 70.Kf8 Qc5 71.Ke8 Qe7) 67.b8Q–+ g1Q 68.Qf8 (68.Qe8 Kh4 69.Qe7 Qg5 70.Qe1 Qg3 71.Qe7 Kh3 72.Qe6 Qg4 73.Qh6 Kg3 74.Qg7–+) 68...Rf6 (68...Qg6 69.Kh8 Rf8) 69.Qg7?? (69.Qf6 Qc5=) 69...Rf7 (69...Qg7 70.Kg7 Kg5 71.Kh7 Rf7 72.Kh8 Kf5 73.Kg8 Kg6 74.Kh8 Rf8) 70.Qf7= Kh4 71.Qg6 Qg4 72.Qg5?? (72.Qg5 Kg5 73.Kg7 Qd7 74.Kf8 Kf6 75.Kg8 Qg7; better 72.Qc6=). BeepBeepImAJeep (2615) – SupWitches (2425), lichess.org, 2018.

4.b5 d5 5.e3 Nbd7 6.Nf3 e6 7.c4 Bd6 8.Be2 (8.cd5 ed5 9.Nd4 Be5=) 8...0–0 9.0–0 dc4 10.Bc4 (10.Na3 Ng4 11.h3 Nge5=) 10...c5 (10...Ng4 11.g3–/+) 11.d4 (11.d3 Re8=) 11...cd4 (11...Bf3 12.Qf3 cd4 13.Bd4–/+) 12.Nd4 (12.Qd4 Qc7 13.Nbd2 Nc5=) 12...Qe7 (better 12...Qc7!? 13.Nd2 Bh2 14.Kh1 Rad8–/+) 13.Be2 Rfd8 14.Bf3 Ne5 15.Bb7 Qb7 16.Qb3 Bc5 (16...Qd5 17.Qd5 Nd5 18.Ba3=) 17.Nd2 (17.Ne6!? fe6 18.Be5+–) 17...Bd4 (17...Rd5 18.Rad1=) 18.Bd4 Ng6 (18...Rd5 19.Rfd1=) 19.Nf3+= Rac8 (19...Ne4 20.Rfc1=) 20.Bf6 gf6 21.Nd4 Kg7 (21...Rd5 22.Rfd1+=) 22.Nc6 Rd5 (22...Rd7 23.Rfd1+=) 23.Rfd1 (23.Rac1 Ne5 24.Ne5 Rc1 25.Rc1 Re5+=) 23...Rd1 (23...Rc5 24.Rac1+–) 24.Rd1+– Ne5 25.Nd4 Qe4 26.h3 Rg8 (26...Ng6 27.f3 Qh4 28.Qb4+=) 27.Qb4 (27.Qa3 Kh8 28.g3 Qb7+=) 27...Kh8 Threatening mate: Qxg2 28.g3 Nf3 29.Kf1 Ng5 (29...e5 30.Qe7 Nd4 31.Qf6 Rg7 32.ed4 Qh1 33.Ke2 Qe4 34.Kd2 Qd4 35.Ke1 Qe4 36.Kf1 Qh1 37.Ke2 Qe4 38.Kf1 Qh1 39.Ke2 Qe4 40.Kf1=) 30.h4 (30.Qe7 Kg7 31.h4 Qg4+–) 30...Nf3 (30...Qg4 31.Rc1 Ne4 32.Ke1–/+) 31.Nc6 (better 31.Qe7!? Nh2 32.Kg1+–) 31...Qc2= 32.Rd7 Qc1 33.Kg2 Ne1 34.Kh3?? (34.Kh2 Nf3 35.Kg2 Ne1 36.Kh2 Nf3 37.Kg2=) 34...Nf3 (better 34...Nd3! 35.Kg2 Nb4 36.Nb4 Qa3–+) 35.Kg2= Ne1 36.Kf1?? (36.Kh2 Nf3 37.Kg2=) 36...Nf3 (better 36...Nd3! 37.Kg2 Nb4 38.Nb4 Qa3–+) 37.Ke2 (better 37.Kg2 Ne1=) 37...Ng1–/+ 38.Kd3 Qd1 39.Qd2 Qd2?? (better 39...Qa4 40.Nd4 Rc8–+) 40.Kd2+– Kg7 (40...Rg4 41.Ra7 Kg7 42.Nd4+–) 41.Rf7 (41.Rf7 Kf7 42.e4–+; better 41.Ra7 Nf3 42.Kc2+–) 1–0. BeepBeepImAJeep (2745) – Sick_clown (2740), lichess.org, 2020.

4.b5 d6 5.e3 e5 6.Nf3 Be7 7.c4 Nbd7 8.Na3 Nc5 9.d4 Nce4 10.de5 (10.Be2!?+=) 10...de5 11.Ne5? (11.Qd8 Rd8 12.Be5 Ng4 13.Bg7 Rg8+=) 11...Qd1 (better is 11...Bb4!? 12.Ke2 Nc3 13.Bc3 Bc3–+) 12.Rd1+= 0–0 13.Bd3 Bb4 14.Ke2 Ba3 15.Ba3 Nc3 16.Kd2 Nd1 17.Rd1 Bg2 18.f3 Rad8 19.Ke2 Rfe8= 20.Nc6 Rd7 21.Bb2 Nh5?? 22.Ne5?? Nf4?? 23.ef4+– f6? 24.Kf2 fe5 25.Kg2?? e4 26.Be2 Rd1 27.Bd1 e3 28.Be2+/– h6 29.Be5 g5 30.Bc7 gf4 31.Bf4 h5 32.h4 Rd8 33.Be3 Kg7 34.f4 Re8 35.Kf2 Kf6 36.Bh5 Kf5 37.Be8 Kg4 38.h5 Kf5 39.h6 Kf6 40.Bd4 Ke7 41.Bh5 Kf8 42.h7 a6 43.ba6 b5 44.ab5 Ke7 45.h8R Kd6 46.Bf7 Ke7 47.Bd5 Kd6 48.Rh5 Ke7 49.c5 Kd7 50.Rh7 Kc8 51.Be6 Kb8 52.Be5 Ka8 53.Bd5# 1–0. azme – shi60, kurnik, 2011.

4.b5 Rg8 5.e3 g6 6.f4 Bg7 7.Nf3 Nh5 8.Bg7 Ng7 9.Bc4 d5 10.Bb3 e6 11.d4 Nf5 12.Qe2 Nh4 13.0–0 Nf5 14.c4 Ne7 15.c5 Nf5 16.c6 Bc8 17.Ne5 Kf8 18.g4 Ng7 19.Qd3 f6 20.Nf3 f5 21.g5 Rh8 22.Ne5 Qe7 23.Qc3 h5 24.Nd2 Ke8 25.Ng6 Qf7 26.Nh8 Ke7 27.Nf7 1–0. jura1946 – geneig, kurnik, 2012.

4.b5 Rg8 5.Nf3 g6 6.g3 Bg7 7.Bg2 Nh5 8.0–0?? (better is 8.Bg7 Rg7 9.0–0+=) 8...Bb2–+ 9.Ra2 Bf6 10.g4 (10.d4 a6 11.Na3 c6–+) 10...Bd5 11.Ra3 Ng7 12.Rd3? Bc4 13.Re3 Ne6 14.Ne1? c6 15.d3 Bd5 16.Bd5 cd5 17.Nf3 d4 18.Re4 Nc5 19.Rf4 g5 20.Rf5 Na4 21.c4 dc3 22.Qa4 e6 23.Qe4?! d5 24.Qe3 Qe7 25.Rc1 ef5 26.Qe7 Ke7 27.gf5 d4 28.e4 g4 29.Ne1 Be5 30.Ng2 f6 31.f4 gf3 32.Kf2 fg2 33.Rg1 Bh2 34.Rg2 Rg2 35.Kg2 Be5 36.Na3 Nd7 37.Nc2 Rg8 38.Kh3 h5 39.Kh4 Rg5 40.Kh3 Bf4 41.Nb4 Nc5 42.Nd5–+ Kf7 43.Nf4 Na4 44.Kh4 c2 45.Ne2 Rg2 46.Nc1 Rg1 47.Ne2 Nc3 48.Ng1 c1Q 49.Nf3 Qf4 50.Kh5 Qf3 51.Kh4 Qf2 52.Kg4 Ne2 53.Kh3 Qg3# 0–1. wk1234 – geneig, kurnik, 2012.

4.c4 e6 5.Qb3 Na6 6.b5 Nc5 7.Qc2 a5 8.Nc3 d5 9.cd5 ed5 10.d4 Nce4 11.Ne4 Ne4 12.Ba3 Ba3 13.Ra3 Qd6 14.Rb3 0–0 15.Nf3 c5 16.e3 c4 17.Rb1 f5 18.Be2 f4 19.0–0 fe3 20.fe3 Rf6 21.Ne5 Raf8 22.Bf3 Nc5 23.Nc4 dc4 24.dc5 Qc5 25.Qe2 Bf3 26.gf3 Rg6 27.Kh1 Re8 28.e4 Rd8 29.Rbc1 c3 30.e5 Rd2 31.Qe4 Kf8 32.e6 Rh2 33.Kh2 Qh5 34.Qh4 Qh4 0–1. blackiwhite (1680) – zoltybuldozer (1950), kurnik, 2012.

4.e3 e6 5.b5 a5 6.Nf3 Bb4 7.c4 (7.Be2 0–0=) 7...0–0=+ 8.Be2 d5 9.0–0 Nbd7 10.d4 Rc8 11.Nbd2 Bd2 (11...c5 12.bc6 Bc6 13.Rc1=) 12.Nd2+= Ne4 (12...c5 13.bc6 Bc6 14.Rc1+=) 13.Ne4 (13.c5 c6 14.Ne4 de4+–) 13...de4 14.Qc2 (14.c5 c6+–) 14...f5 (14...c5 15.bc6 Bc6 16.Rab1+=) 15.Rad1 Qe7 16.Qc3 Nf6? (better 16...Qb4+–) 17.Ba3+– White intends c5 17...Qd7 18.Bf8 Re8?? (18...Rf8 19.c5 Nd5+–) 19.c5 (better 19.Ba3 Rd8+–) 19...Nd5 20.Qc1 Rf8 21.c6 (21.c6 Bc6 22.bc6+–) 1–0. BeepBeepImAJeep (2585) – Ali_rastbod (2455), lichess.org, 2016.

4.Nf3 g6 5.g3 Bg7 6.Bg2 0–0 7.0–0 d5 8.b5 Nbd7 9.Qc1 e5 (9...c5 10.c4=) 10.Be5 (better is 10.Ne5!? a6 11.f4+/–) 10...Ne5= 11.Ne5 Re8 12.Nd3 (12.d4 Ne4+=) 12...Ne4 13.c3 d4 14.f3 Nc5 15.Nc5 bc5 16.e4 de3 17.de3 Qd3 18.e4 Rad8 19.Rf2 Qd1 20.Rf1 Qc1 (better is 20...Qd3!?=) 21.Rc1+/– Rd3 22.Ra3 Red8 23.Kf2 f5 24.Bf1 (24.a5 fe4 25.fe4 Bh6+/–) 24...R3d7? (24...Rd1 25.Rd1 Rd1 26.Rb3 fe4 27.Bg2=) 25.Re1 fe4+= 26.fe4 Rf8 27.Kg1 Be5 28.Bc4 Kg7 29.Bf1 Rdf7 30.Bg2 Rf2= 31.Re3 Bd6 32.Ra1?? c4–+ 33.Na3 Bc5 34.Ree1?? Rf1# 0–1. wk1234 – 4washt, kurnik, 2012.

4.Nf3 Rg8 5.g3 g6 6.Bg2 Bg7 7.0–0 Ng4 8.Bg7 Rg7 9.e3 Nh6 10.Nh4 Bg2 11.Ng2 e6 12.Qf3 c6 13.b5 Qf6?? (better is 13...a6 14.Ra3 Nf5=) 14.Qf6+– Rg8 15.bc6 (better is 15.Qf4 a6 16.Qh6 ab5+–) 15...Nc6 16.Nc3 Ng4 17.Qf4 h5 18.Nb5 Rc8 19.Nd6 Kd8 20.Nc8 Kc8 21.Qf7 Rd8 22.Qg6 Nge5 23.Qh5 Ne7 24.Qe5 Nf5 25.a5 ba5 26.Ra5 Ne7 27.Ra7 Nc6 28.Qc7# 1–0. wk1234 – geneig, kurnik, 2012.

4.Ra3 e6

5.Rg3 d6 6.Na3 e5 7.Qa1 Nbd7 8.e3 Ne4 9.Rg4 f5 10.Re4 fe4 11.d3 ed3 12.cd3 Qg5 13.Nf3 Bf3 14.gf3 Be7 15.f4 Qf5 16.fe5 Ne5 17.h4 Bf6 18.Nb5 0–0 19.Nc7 Rac8 20.Nd5 Nd3 21.Bd3 Qd5 22.Ke2 Bb2 23.Qb2 Qh1 24.Qb3 d5 25.a5 Qf3 26.Kd2 Qf2 27.Be2 Qh4 28.Qd3 Qb4 29.Kd1 Qa5 30.Qd5 Qd5 0–1. xtom – krzysztofkm, kurnik, 2012.

5.Rg3 Ne4 6.Re3 Bb4 7.Nf3 0–0 8.Na3 f5 9.Qa1 Rf7 10.c3 Bc5 11.d4 Bd6 12.Nc4 g5 13.Nd6 cd6 14.h3 g4 15.hg4 fg4 16.Re4 Be4 17.Nd2 Bb7 18.c4 Qf6 19.f3 Qf4 20.Qb1 Qg3 21.Kd1 gf3 22.gf3 Nc6 23.d5 Ne5 24.Ne4 Qg6 25.Rh2 Kf8 26.a5 ed5 27.cd5 Bd5 28.ab6 Be4 29.fe4 Rf1 30.Kc2 Qe4 31.Kb3 Qc4 0–1. xtom – sauron513 (1755), kurnik, 2012.

5.h4? Bb4–+ 6.Rg3 0–0 7.e3 –+.

5.h4? Bb4–+ 6.Rg3 Bf8 7.Na3 Qe7 8.Qa1 Nc6 9.h5 0–0–0?? (better is 9...Ne4 10.Rgh3 e5–+) 10.h6+– Ne4 (10...e5 11.hg7 Bg7 12.Rg7+–) 11.hg7 Bg7 12.Rg7 Qd6 13.d3 Nc5 14.Nb5 Qf4 15.e3 Qf5 16.a5! Na5 17.Na7 Kb8 18.Nb5 Ba6 19.Nd4 Qd5 20.c4 Nc4 21.dc4 Bc4 22.Bc4 Qc4 23.Nge2 Nd3 24.Kf1 e5 25.Nf3 f6 26.Kg1 e4?? 27.Nfd4 c5 28.Nc6 Kc7 29.Nd8 (29.Nd8 Rd8 30.Qa7 Kc8 31.Bf6+–) 1–0. xtom – jozek2011r (1630), kurnik, 2011.

5.h4? Bb4–+ 6.Rg3 Bf8 7.Na3 g6 8.Qa1 Bg7 9.Nf3 Rg8 10.h5 Nh5 11.Rh5+/– Bb2? 12.Qb2+– Qe7 13.Rh7 Nc6 14.Ng5 0–0–0 15.Rf7 Qd6 16.Nb5 Qc5 17.d4 Qc4 18.e3 Qa4 19.Bd3 Kb8 20.Rf4 Rh8 21.d5 Qa5 22.Ke2 ed5 23.Nf7 g5 24.Nd8 gf4 25.Qh8 fg3 26.Nc6# 1–0. xtom – jozek2011r (1640), kurnik, 2011.

4.Ra3 g6

5.b5 e6 6.h4 Ba3 7.Na3 Qe7 8.Qa1 e5 9.Be5 Rg8 10.Bf6 Qd6 11.Nc4 Qe6 12.e3 d6 13.Nf3 Nd7 14.Bc3 Nc5 15.Nd4 Qg4 16.f3 Qg3 17.Ke2 0–0–0 18.Rh3 Bf3 19.Nf3 Qg4 20.a5 Ne4 21.ab6 Nc3 22.Qc3 ab6 23.Kf2 Rge8 24.Rg3 Qe6 25.Nd4 Qd5 26.Rg5 Qe4 27.g3 f6 28.Bg2 Qe7 29.Rg4 f5 30.Rf4 g5 31.Rf5 gh4 32.Qa3 d5 33.Qa8 Kd7 34.Qc6 Kc8 35.Nb6 Kb8 36.Qa8 1–0. xtom – andishoshaj, kurnik, 2012.

5.b5 Bg7 6.Rg3 0–0 7.Nc3 Nh5 8.Rg5 a6 9.ba6 Ba6 10.Qa1 e5 11.h4 d5 12.e3 Bf1 13.Kf1 d4 14.Ne4 c5 15.g4 de3 16.fe3 Nf6 17.Be5 Ne4 18.Bg7 Qd2 19.Rh2 Qh2 0–1. xtom – gilesgsgs (1665), kurnik, 2012.

5.Rf3? Bf3 6.Nf3 Bg7 7.e4–/+.

5.Rf3? Bg7 6.Na3 (6.Rh3 0–0+=) 6...d6 (6...Bf3 7.Nf3 a5 8.b5–/+) 7.Qa1? (7.Rb3 Nbd7+=) 7...Qd7 8.Rh3 Nc6 9.b5+= Nb4 10.Nf3 a5 11.e3 0–0–0 12.Bd3 e5 13.Rh4 Rhg8 14.Rb4? ab4–+ 15.Nc4 e4 16.a5?? ed3–+ 17.ab6 Qb5 18.cd3 cb6 19.Bf6+= Bf6 20.Qf6 b3 21.0–0+/– Qd5?? 22.Rb1 Qd3= 23.Nb6 Kb8–/+ 24.Qb2 g5 25.Nd4= Qe4 26.f3+– Qd3 27.Qa1 Qd2+/– 28.Rb3 g4?? 29.Nc6! Bc6?? 30.Nc4 Kc7 31.Nd2 Kd7+– 32.f4 h5 33.Qa7 Ke8 34.Nc4 Bd5 35.Qa4 Kf8 36.Rb7 (36.Rb7 Bb7 37.Qb4+/–) 1–0. xtom – jozek2011r, kurnik, 2011.

5.Rg3 Bg7 6.Na3 0–0 7.Qa1 a5 8.b5 c6 9.h4 cb5 10.Nb5 Bc6 11.h5 Nh5 12.Rh5 Bb5 13.Bg7 f6 14.Bf8 Qf8 15.ab5 d6 16.e3 Nd7 17.Bc4 Kg7 18.Rh4 Ne5 19.Qd4 Rc8 20.Bd3 Nd3 21.Qd3 Rc5 22.c4 Qf7 23.Nf3 d5 24.cd5 Rd5 25.Rd4 Rc5 26.Rgg4 Qa2 27.Rc4 Qa1 28.Ke2 Qb1 29.Qb1 1–0. xtom – lisijs1 (1640), kurnik, 2012.

5.Rg3 Bg7 6.h4 Nc6 7.Na3 (better is 7.b5!? Nb4 8.Bd4+=) 7...Nb4–+ 8.Qa1 d6 9.h5 Qd7 (9...0–0 10.hg6 fg6 11.Nf3–/+) 10.hg6 (better is 10.h6!? Bf8 11.Bf6 ef6 12.Qf6+=) 10...fg6–/+ 11.Nf3 (11.c3 Nc6–/+) 11...0–0–0 (better is 11...Qa4 12.Qb1 e5–+) 12.Nb5?? (better is 12.a5–/+) 12...Nc2–+ 13.Kd1 Na1 14.Ba1 Kb8 (14...a6 15.Bf6 Bf6 16.Nc3 Bc3 17.dc3 Qa4 18.Kd2 Qa2 19.Kc1–+) 15.e3 a6 16.Nbd4 Qa4 17.Ke2 Qa1 18.Rh4 Nh5 19.Rg5 Bf3 20.gf3 Bd4 21.ed4 Rhf8 22.Bg2 Nf4 23.Ke3 Qe1# 0–1. xtom – jozek2011r, kurnik, 2011.

5.h4 e6 6.Rg3 Bb4 7.Na3 (7.h5 Bd6 8.Rb3 Rg8–/+) 7...Be7 8.Qa1 d5 9.h5 Nbd7 (better is 9...gh5!? 10.Nf3 c5–/+) 10.hg6= fg6 11.Nf3 (better is 11.Rg6 a6 12.Nf3=) 11...Ne4?? (better is 11...Rg8–/+) 12.Bh8+– Ng3 13.fg3 Bf6 14.Bf6 Qf6 15.Qf6 Nf6 16.Nb5 0–0–0 17.Na7 Kb8 18.Nb5 Bc6 19.e3 Kb7 20.Ng5 Ra8 21.Nc3 Ba4 22.Na4 Ra4 23.Nh7 Ne4 24.Nf8?? Ng3?? 25.Rh3 Ra1–/+ 26.Kf2 Nf1 27.Rh1 Ra8+= 28.Ne6 Nd2 29.Nf4 Ra2 30.Rh7 Rc2 31.Nd5–/+ b5 32.Ke1 Ne4 33.Rc7?? Rc7–+ 34.Nc7 Kc7 35.Ke2 Kd6 36.Kd3 Nc5 37.Kd4 b4 38.Kc4 b3 39.Kc3 Ke5 40.Kd2 Ke4 41.g3 g5 42.g4 Na4 43.Ke2 b2 44.Kf2 b1Q 45.Ke2 Qd3 46.Kf2 (46.Kf2 Qd2 47.Kg3 Qe2 48.Kh3 Kf3 49.e4 Qg2#). xtom – hanpijesak, kurnik, 2011.

5.h4 e6 6.Rg3 Bd6 7.Re3 Bf4 (better is 7...Bb4!? 8.h5 gh5–/+) 8.Reh3+= d6 9.Na3 Be5 10.c3 a5 11.b5 Nbd7 12.Nf3 Bf3 13.gf3 d5 14.Qa1 Nc5?? (better is 14...Qe7+=) 15.d4+/– Na4 16.de5 Nh5 17.e3 0–0 18.Be2 Rc8 19.f4 Ng7 20.h5 g5 21.Rg1 h6 22.fg5 hg5 23.h6 Nf5 24.h7 Kh8 25.Qb1 Nb2 26.Qb2 c5 27.Qc2 c4 28.Bg4 f6 29.Bf5 ef5 30.Qf5 Qe7 31.Nc2 fe5 32.Qg5 Qg5 33.Rg5 d4 34.cd4 ed4 35.Nd4 c3 36.Nc2 Rcd8 37.e4 Rd7 38.Rc3 Rh7 39.Rc6 Rh1 40.Ke2 Rh2 41.Rf5 Rf5 42.ef5 Rh5 43.Ne3 Rh7 44.Rb6 Ra7 45.Ra6 Re7 46.Ra5 Re5 47.Kd3 Rc5 48.Kd4 Rc1 49.f4 Rb1 50.Kc5 Rc1 51.Kb6 Rb1 52.Kb7 Rb2 53.b6 Kg7 0–1. xtom – rodebert (1775), kurnik, 2011.

5.h4 h5 6.e3 Bg7 7.Be2 (7.Nf3 a5 8.b5 0–0=) 7...d5 (7...Bg2!? 8.Rh2 Bb7–/+) 8.Rc3 0–0 9.Nf3 Nbd7 10.Rg1 c5 11.bc5 bc5 12.Nh2 Qc7 13.g4?? (better is 13.Nf3–/+) 13...Qh2–+ 14.Rg3 (14.Rf1 hg4 (worse is 14...Ng4 15.Rb3 Bc6 16.Bg4 hg4 17.Bg7 Kg7 18.Qg4–+; worse is 14...Qh4 15.gh5 gh5 16.Rb3–+) 15.Bg4 d4–+) 14...Qh4 15.gh5 Nh5 16.Bh5 Qh1 17.Ke2 Qh5 18.f3 Qh2 19.Kd3 Qg3 20.Na3 c4 (20...c4 21.Ke2 Qg2 22.Ke1 Bf6 23.Rc4 dc4 24.Bf6 Qg1 25.Ke2 Bf3 26.Kf3 Qd1 (26...Nf6?! 27.Qg1 Rfc8 28.Qg5–/+) 27.Kf2 Qd2 28.Kf3 Qd1 29.Kg3 Qd6 30.Kg2 ef6 31.Nc4 Qd5 32.Kg3 Qc4 33.a5 Rfe8 34.Kf2 Qc2 35.Kf3 Qd1 36.Kg3 Re3 37.Kg2 Qd2 38.Kf1 Re1) 0–1. xtom (1615) – cypisek1969 (1865), kurnik, 2011.

5.h4 Bg7

6.Rg3 d6 7.Na3 Qd7 8.Qa1 (8.b5!?+=) 8...Qa4–/+ 9.h5 (9.Bc3 e5–/+) 9...Qb4–+ 10.h6 Bf8 (better is 10...Ne4 11.c3 Qc5=) 11.Bf6+– ef6? (11...Rg8 12.Bc3 Qc5 13.Nf3+–) 12.Qf6 Rg8 13.Re3 Kd7?? (better is 13...Be4 14.f3 Nd7+–) 14.Qf7 Kc8 15.Qg8 Bc6+– 16.Qf8 Kb7 17.Rhh3 Qb2 18.f3 Nd7 19.Qf4 Ne5 20.Rb3 Qc1 21.Kf2 Rg8 22.e3 Qd2 23.Be2 g5 24.Qb4 g4 25.Qd2 gf3 26.Rf3 Bf3 27.Bf3 Nf3 28.gf3 Rg6 29.Qd5 Kb8 30.Qf7 Kb7 31.Qh7 Rg5 32.Qe4 Kb8 33.h7 Rh5 34.Qe8 Kb7 35.h8 Rh2+– 36.Kg3 Rc2 37.Rc3 Rc3 38.Nc4! Rc4 39.Qc6 Rc6 40.Ne2 Rc3?? 41.Nf7 1–0. xtom – jozek2011r, kurnik, 2011.

6.Rg3 h5 7.Na3 a5 8.b5 d6 9.Qa1 Nbd7 10.Nf3 c6 11.Nd4 c5 12.Nc6 Bc6 13.bc6 Nb8 14.Nb5 Nc6 15.e3 Qd7 16.Be2 Rc8 17.Bf3 0–0 18.Rg5 d5 19.g4 hg4 20.Bg4 Ng4 21.Bg7 d4?? 22.Bf8+/– Kf8 23.h5 de3?? 24.fe3 e6 25.hg6 Nb4 26.g7 Ke7 27.Qc3 Nf6 28.Rh8 Ng8 29.Qc4 Qc6 30.Qh4 f6 31.Rg6 Nc2 32.Kf2?? Qd5+= 33.Rg8 Qd2 34.Kg1 Qe3 35.Kh2 Qe5–+ 36.Rg3 Rg8 37.Qh7 Qe2 38.Kh3?? Qf1 39.Kh4 Qh1 40.Rh3 Qe1 41.Kh5 Qd1 (41...Qd1 42.Kh4 Qg1–+) 0–1. xtom (1625) – cypisek1969 (1855), kurnik, 2011.

6.Rg3 h5 7.Na3 d6 8.Qa1 Nbd7 9.e3 c5 10.b5 a6 11.Nf3 ab5 (11...e5 12.ba6 Ba6 13.Ba6 Ra6 14.Nb5=) 12.Nb5 (12.Bb5 0–0=) 12...Bc6 13.Be2 0–0 14.Nh2 (14.0–0 Ne5 15.Be5 de5 16.Ne5 Bb5 17.Bb5 Ne4–/+ (17...Qd2?! 18.Qa2 e6 19.Bc6=)) 14...Ne5 15.f4 (15.d4 Ned7+=) 15...Ned7 (15...Ne4 16.Rh3 c4 17.Bc4 Nc4 18.Bg7–+) 16.Rg5 Bb5 17.Bb5= Qc7 18.g4 White intends f5 18...hg4 19.Ng4+= e5 20.f5 Ng4 21.Rg4+/– Nf6 22.Rg2 Qb7 23.Rhg1 Nh5 24.fg6+– f6?? 25.Qd1 Nf4 26.ef4 ef4 27.h5 Rae8 28.Re2 Re2 29.Qe2 f3 30.Qe6 Kh8 31.h6 Bh6 32.Bf6 Rf6 33.Qf6 Bg7 34.Rh1 Kg8 35.Bc4 d5 36.Qd8 Bf8 37.Bd5 Qd5 38.Qd5 Kg7 39.Qf7# 1–0. xtom – justwin1 (1635), kurnik, 2011.

6.Rg3 Nh5 7.Rg5?? (better is 7.Bg7 Ng7 8.Nc3+=) 7...Bb2–+ 8.c3 f6 9.Rh5 gh5 10.Qb3 Ba1 11.Qa2 Bc3! 12.Nc3 Nc6 13.b5 Na5 14.e3 e6 15.Be2 Qe7 16.Bh5 Kd8 17.Nf3? f5 18.Ne5 Bg2 19.Rg1 Bb7?? 20.Nf7+– Kc8 21.Nh8 Bd5?? 22.Nd5 ed5 23.Qd5 c6 24.bc6 Nc6 25.Bf3 Kb7 26.a5 Rh8 27.ab6 ab6 28.Qb3 Ra8+/– 29.Ke2 Kc7 30.Rc1 Rb8 31.Qb5 Qe6+/– 32.Bd5 Qd6 33.f4 Re8 34.Qc4 Qg6 35.h5 Qh5+= 36.Bf3 Qg6 37.Qa6 Kd6 38.Qb6+– Ke7 39.Bc6 dc6+/– 40.Rc6 Qg4 41.Kd3 Rd8?? 42.Kc4 Qg8? 43.Kb5?? Qd5 44.Rc5?? Qb3–+ 45.Ka6 Ra8 46.Kb7 (46.Kb7 Rb8!! 47.Kb8 Qb6 48.Ka8 Qc5 49.Kb8 Kd8 50.d4 Qb4 51.Ka7 Kc7 52.e4 Qa5#). xtom – jozek2011r, kurnik, 2011.

6.h5 0–0 7.Rh2 Nc6 (7...gh5?! 8.Rg3 e6 9.e3=) 8.b5 Na5 9.hg6 fg6 10.Rah3 Rf7 11.g4?? (11.Bf6 Bf6 12.e3 e5=) 11...Nc4?? (better is 11...Ng4 12.Bg7 Nh2 13.Rh2 Kg7–+) 12.Bc3 d5 13.e3= Ne4? 14.Bg7+– Rg7 15.Bd3 e5 16.Nf3 Ng5 17.Ng5 Qg5 18.Nc3 Nb2+= 19.Qe2? e4–+ 20.Ne4 Nd3 21.cd3 de4 22.de4 Be4 23.Qc4 Qd5 24.Qc3 Qd3 25.Qe5? Qb1 26.Ke2 Bd3 27.Kf3 Rf7 28.Kg3 Raf8 29.f4 Qe1 30.Kf3 Qf1 31.Kg3 Be2 32.Qe6 Qe1 33.Rf2 Qg1 34.Rg2 Qe1 35.Rf2 Qd2 36.f5 Qd6 37.Qd6+= cd6 38.fg6?? Rf2–+ 39.gh7 Kh8 0–1. xtom (1675) – kasztan47 (1740), kurnik, 2011.

6.h5 gh5?! 7.Rg3 Kf8 8.Nf3=.

4.b5 e6

5.e3 d5 6.Nf3 Bd6 7.Be2 0–0 8.c4 Nbd7 9.0–0 c6 10.d4 cb5 (10...dc4 11.Nbd2=) 11.cb5 e5?? (11...Rc8 12.Qd3=) 12.Nc3 (better 12.de5 Ne5 13.Be5 Be5 14.Ne5+–) 12...e4= 13.Nd2 Qc7 14.h3 Bc8 (14...Rfc8 15.Rc1 Qd8 16.f3=) 15.Rc1 (15.Qb3 Bb7=) 15...Qd8 (15...Qb8 16.Qb3 Bb7 17.Ba3=) 16.Qb3 Bb7 17.Ba3 Rc8?? (better 17...Ba3 18.Qa3 Qe8+=) 18.Bd6+– Nb8 (18...Re8+–) 19.Bf8 Kf8 20.Na2 Kg8 21.Rc8 Qc8 (21...Bc8 22.Rc1 Be6 23.Qc3+–) 22.Rc1 Qd8 23.Qc3 Nbd7 24.Qc7 Qc7 (24...Qa8 25.a5 ba5 26.Nb3+–) 25.Rc7 Ba8 (25...Kf8 26.Rb7 Ke7 27.Ra7+–) 26.Rc8 Nf8 27.Ra8 g6 28.Nb4 Kg7 29.Nc6 (29.Nc6 N6d7 30.Ra7+–) 1–0. BeepBeepImAJeep (2575) – Mudshark (1690), lichess.org, 2018.

5.Nf3 Bc5 6.g3 0–0 7.Bg2 Ng4 8.d4 Bd6 9.Qd3 c6 10.Nh4 e5 (10...a6 11.Nd2=) 11.de5 (better is 11.Nf5!? Bc7 12.Qf3+/–) 11...Be5= 12.Be5 Ne5 13.Qd6 Nc4 14.Qd4 d5 15.Nc3 Qe7 16.bc6 Nc6 (16...Bc6? 17.Nd5 Qe5 18.Qe5 Ne5 19.Nc7 Bg2 20.Ng2+–) 17.Qd5?? (17.Nd5 Nd4 18.Ne7 Kh8 19.Bb7 Nc2 20.Kf1 Na1 21.Ba8 Ra8=) 17...N6a5?? (better is 17...Qb4 18.0–0 Qc3–+) 18.Qb5 Bg2 19.Ng2 Rfe8 20.e3? (20.Nf4 Rad8 21.0–0 Ne3=) 20...Rad8 (better is 20...a6!? 21.Qb1 Qc5–/+) 21.0–0+= Ne5 22.Nd5 Nf3 23.Kh1 Qe5 24.Ndf4 Qf6 25.Qa6 Qh6 26.h4 1–0. wk1234 – starters, kurnik, 2012.

5.Nf3 Bc5 6.g3 d5 7.Bg2 0–0 8.0–0 c6 9.Nc3 cb5 10.ab5 Nbd7 11.d4 Bd6 12.Qb1 Ne4 13.Ne4 de4 14.Nd2 Nf6 15.h3 e5 16.de5 Be5 17.Be5 Qd2 18.Bf6 gf6 19.Qd1 Rad8 20.Qd2 Rd2 21.Ra7 Bd5? 22.Rd7 f5 23.f3 Rc8?? 24.fe4+– fe4 25.Be4! Re2 26.Bd5 Rcc2 27.Bf7 (27.Bf7 Kg7 28.Bc4 Kh6 29.Be2 Re2 30.Rf6 Kg5 31.Rb6+–) 1–0. wk1234 – chessguaru, kurnik, 2011.

5.Nf3 Be7 6.g3 0–0 7.Bg2 d6 8.0–0 Nbd7 9.Nd4 Bg2 10.Kg2 e5 11.Nc6 Qe8 12.f3 Nc5 13.d4 ed4 14.Bd4 Ne6 15.Bc3 Nc5 16.Nd2 Nd5 17.Bd4 Bf6 18.Bf6?? (18.Nc4 Bd4 19.Qd4 Qe2 20.Kg1–/+) 18...Nf6 (better is 18...Ne3 19.Kh1 Nd1 20.Ne7 Kh8 21.Rad1 gf6–+) 19.Nc4 Qd7 20.e4 Rfe8 21.e5 de5 22.Qd7 Nfd7 23.Rad1 Nf6 Black plans e4 24.Ra1 e4 25.fe4 Nfe4 26.Rfe1 Nc3 27.Ne7 Kf8 28.Nc6 N3a4 29.Re8 Re8 30.Na7 Re4 31.Na3 g6 32.c4 Kg7 33.Rd1 Nb2 34.Rd8 Nc4 35.Nc4 Rc4 36.Rc8 Ne4 37.Kf3 Nd6 38.Rd8 Rc5 39.Rd7 Nb5 40.Nb5 Rb5 41.Rc7 Rb2 42.h4 b5 43.Rb7 h6 44.Kf4 h5 45.Ke5 Rb3 46.Kf4 Rb4 47.Kf3 Rb3 48.Kf4 b4 49.g4 hg4 50.Kg4 Rb2 51.Kg5 b3 52.Kf4 Rh2 53.Kg3–/+ Rb2 54.Kf3?? Rb1–+ 55.Ke3 b2 56.Kd2 Rh1 57.Rb2 Rh2 58.Kc3 Rb2 59.Kb2 Kh6 60.Kc3 Kh5 61.Kd3 Kh4 62.Ke3 g5 63.Kf3 f6 64.Kg2 f5 65.Kf3 g4 66.Kg2 f4 Black intends g3 67.Kf2 Kh3 68.Kg1 g3 69.Kh1 Kg4 70.Kg2 f3 71.Kg1 Kf4 72.Kh1 Ke3 73.Kg1 Ke2 Black prepares f2 74.Kh1 f2 75.Kg2 f1Q 76.Kg3 Ke3 77.Kg4 Ke4 78.Kg5 Qf4 79.Kg6 Ke5 80.Kg7 Ke6 81.Kg8 Qf6 82.Kh7 Qg5 83.Kh8 Kf6 84.Kh7 Qg7# 0–1. wk1234 – spunciu, kurnik, 2012.

5.Nf3 Be7 6.g3 c6 7.Bg2 cb5 8.ab5 d6 9.0–0 0–0 10.Nd4 Bg2 11.Kg2 e5 12.Nb3 Qd7 13.c4 a6 14.Nc3 Qb7 15.f3 ab5 16.Nb5 Ra1 17.Qa1 Nc6 18.d4 ed4 19.N3d4 Nd4 20.Bd4 Ra8 21.Qb2 Qc6 22.Rc1 Rf8 23.e4 g6?? 24.Na7 Qb7 25.Nb5 Qc6 26.Bf6 Bf6 27.Qf6 Re8 28.Qd6 Qd6 29.Nd6 Rd8 30.e5 Kg7 31.Rb1 Rb8 32.c5! Rc8 33.cb6 Rc5 34.f4 g5 35.b7 gf4 36.gf4 Rc2 37.Kh3 Rf2 38.b8Q Rf4 39.Rg1 Kh6 40.Qf8 Kh5 41.Qg7 Rh4 42.Kg3 f6 43.Qf6 Rg4 44.Kf2 Rg1+– 45.Kg1 Kg4 46.Qf5 Kh4 47.Kg2 h6 48.Kf3 h5 49.Qf4 Kh3 50.Qg3# 1–0. wk1234 – spunciu, kurnik, 2012.

4.b5 g6

5.Na3 Bg7 6.c4 0–0 7.e3 a6 8.Nf3 ab5 9.ab5 c6 10.Be2 cb5 11.cb5 d5 12.Nc2 Nbd7 13.0–0 Nc5 14.Ncd4 Nce4 15.Ne5 Nd7 16.Nec6 Bc6 17.bc6 Ndc5 18.Qc2 Ra1 19.Ra1 Qc7 20.f3 Nd6 21.d3 Ne6 22.Ne6 fe6 23.Bg7 Kg7 24.Qb2 Kg8 25.Rc1 Rc8 26.Qe5 Kf7 27.e4 Nb5 28.Qg5 de4 29.fe4 Na7 30.Rf1 Kg7 31.h4 Qc6 32.Qe7 Kh6 33.Rf7 Qc5 34.Kh1 Qe7 35.Re7 Nc6 36.Re6 Nd4 37.Rb6 Ne2 38.Kh2 Rd8 39.Rb7 Rd3 40.g4 Nf4 41.g5 Kh5 42.Rh7 Kg4 43.e5 Re3 44.Re7 Rh3 45.Kg1 Kh4 46.Kf2 Kg5 47.Ra7 Rb3 48.Ra5 Kf5 49.Ke1 Ne6 50.Kd2 g5 51.Kc2 Re3 52.Ra8 Re5 53.Rh8 g4 0–1. poganinbezdom – cristodulo, kurnik, 2012.

5.Na3 Bg7 6.f3 d6 7.e4 0–0 8.Ne2 Nbd7 9.Ng3 Nc5 10.c4 a6 11.d4 Ncd7 12.Nc2 e5 13.d5 ab5 14.cb5 Nc5 15.Nb4 Nfd7 16.Nc6 Bc6 17.dc6 Nf6 18.Bc4 Kh8 19.0–0 Ne8 20.Ne2 Bh6 21.Qc2 Ng7 22.Rfd1 f5 23.Nc3 f4 24.Nd5 Nge6 25.Bc3 Bg7 26.Ra2 Qh4 27.Rda1 g5 28.Ne7 g4 29.Nf5 Qg5 30.a5 ba5 31.fg4 Qg4 32.Ng7 Ng7 33.Ra5 Rab8 34.Ra7 f3 35.R1a2 Ne4 36.Rc7 h5 37.Bd5 f2 38.Kf1 Nc5 0–1. poganinbezdom – iaiaiaiaiaja, kurnik, 2012.

5.c4 Bg7 6.e3 d6 7.Nf3 Qd7 8.Be2 0–0 9.d4 c6 10.Nbd2 cb5 11.ab5 a6 12.ba6 Ba6 13.0–0 Bb7 14.d5 (14.Qb3 Ra6+/–) 14...Ra1 15.Qa1 Na6 (15...Rc8+=) 16.Bc3 (16.Ne4! Ne4 17.Bg7+/–) 16...Ra8 17.Qb2 Nc5 18.Qb6 (18.Bd4+=) 18...Qc8?? (18...Na4!? 19.Qb3 Nc3 20.Qc3 Nd5+=) 19.Rb1 (19.Bd4 Rb8 20.Rb1 Nfd7+/–) 19...Nfd7 (19...Nd5 20.cd5 Bc3 21.Bc4=) 20.Qb2 Na4= 21.Qb7 Nc3 22.Qc8 Rc8 23.Re1 Ne2 24.Re2 Ne5 25.Ne5+= Be5 26.Re1 Bc3 27.Rd1 Kg7 28.g4 Bd2 29.Rd2 Rc4 30.h3 Kf6 31.f4 h6 32.Kf2 g5 33.Kf3 gf4 34.ef4 Rc3 35.Kg2 Kg6 36.h4 White plans g5 36...f6 37.Re2 Kf7= 38.g5 hg5–/+ 39.hg5 fg5 40.fg5 Rc5 41.Rd2 Rc4 42.Kg3 Re4 43.Rf2 Kg6 44.Rf4 Re5 45.Rd4 Rg5 46.Kf4 Rh5 47.Kg3 Kf5–+ 48.Rd1 Ke5 49.Kg4 Rh7 50.Kf3 Rf7 51.Ke3 Rf4 52.Rd2 Re4 53.Kf3 Rd4 54.Re2 Kd5 55.Re7–/+ Rd3 56.Ke2 Kd4 57.Rd7 d5 58.Rd5= Kd5 59.Kd3 ½–½. fagus54 – grudzien2012r, kurnik, 2012.

5.e3 Bg7 6.c4 0–0 7.Nf3 d6 8.Be2 Nbd7 (8...c6 9.0–0=) 9.0–0 Re8 10.d4 e6 11.Nc3 d5 (11...a6 12.Qd2=) 12.a5 (12.cd5 Nd5 13.Nd5 Bd5+=) 12...ba5 (12...dc4 13.a6 Bd5 14.Nd2+= (worse 14.Nd5 ed5 15.Rc1 Ne4=+)) 13.Ra5 (13.c5 c6+–) 13...a6 (13...c5 14.Qa1+=) 14.c5 (14.cd5!? ab5 15.Ra8 Qa8 16.de6 Re6 17.Bb5+–) 14...ab5+= 15.Rb5 (15.Ra8 Ba8 16.Bb5 c6+=) 15...Ba6= 16.Rb3 Be2 17.Qe2 Rb8 (17...c6 18.Rb1=) 18.Rb8+= Qb8 19.Rb1 Qc8 (19...Qa8 20.Qd3+=) 20.Bc1 (20.c6!? Nb8 21.Ne5+–) 20...c6= 21.Na4 Ne4 (21...e5 22.Bb2=) 22.Nd2 (22.Nb6 Qc7 23.Nd7 Qd7=) 22...Qa8 (22...Nd2!? 23.Bd2 e5=) 23.Ne4+= Qa4 24.Nd6 Ra8 25.g3 (25.Rb7 Ra7 26.Ra7 Qa7=) 25...Bf8 26.Bd2 Bd6 27.cd6 The passed pawn on d6 will quickly become a dangerous weapon 27...Qa2 (27...c5!?=+) 28.Rb7 Nf6 29.Kf1 (better 29.Qe1!?=) 29...Ne4–/+ 30.Be1 Qe2 (30...Nd6 31.Rc7–/+) 31.Ke2 Nd6 32.Rd7 (32.Rc7 Nb5 33.Rc6 Ra2 34.Kf3 Rb2=) 32...Ne4 (32...Nc4 33.Rc7–/+) 33.Rc7 Ra2 34.Kf1 Ra6 35.f3 (35.g4 h6–/+) 35...Nd6 36.Bb4 Nf5 (36...Nc4 37.e4–/+) 37.Ke2=+ Ra2 (better 37...Kg7=+) 38.Bd2 (38.Kd3 Rb2 39.Rc8 Kg7 40.Rb8 Rh2 41.g4=) 38...Ra6 (better 38...Nd6!? 39.Kd3 Ra3 40.Kc2 Nc4–+) 39.Kd3 (39.Bb4 Kg7=+) 39...Kg7 40.g4 (40.e4 Nd6 41.Bb4 Nc4=+) 40...Nd6 (40...Nh4 41.f4–/+) 41.Bb4=+ Nb5 42.Rc8 Ra2 (42...h6!?=+) 43.g5= Do you see the mate threat? 43...Rb2?? (better 43...f6 44.Rc6 Rb2+= (worse 44...fg5 45.Rb6+–)) 44.Bf8 Kg8 45.Bh6 1–0. BeepBeepImAJeep (2480) – Belsebusky (2150), lichess.org, 2018.

5.g3?? Bh1 6.Nf3 Bg7 –+.

5.Nf3 Bg7

6.e3 0–0 7.Be2 c6 8.0–0 cb5 9.ab5 a6 10.c4 ab5 11.cb5 Ra1 12.Ba1 Bf3 13.Bf3 Ne8 14.Nc3 Nd6 15.Qb3 Nf5 16.d4 Nh4 17.Be4 d6 18.Bb2 Nd7 19.Nd5 Nf5 20.g4 Nh6 21.h3 Kh8 22.Rc1 f5 23.gf5 Nf5 24.Bf5 Rf5 25.e4 Rh5 26.Nf4 Rh4 27.Ne6 Qg8 28.Rc7 Re4 29.d5 Re6 30.de6 Nc5 31.Qd5 Bb2 32.Re7 Bf6 0–1. blackiwhite (1695) – bebi52 (1720), kurnik, 2012.

6.g3 0–0

7.Bg2 c6 8.0–0 a6 9.Nd4 Qc7 10.Nc3 cb5 11.ab5 Bg2 12.Kg2 a5 13.e3 d6 14.Qf3 Nbd7 15.Nc6 Ne5 16.Ne5 de5 17.Nd5?? (better is 17.d3+=) 17...Nd5–/+ 18.Qd5 Qd8 (18...Rad8 19.Qb3 Rd2 20.Bc3–/+) 19.Qc6 (19.Qe4 Qd7=) 19...Qd6 20.Qd6 ed6 21.f4 Rac8 22.c3 e4 23.d4? f5 24.Rfc1 d5 25.Ba3 Rfe8 26.Bd6 Bf8 27.Be5 Rc4–+ 28.Bc7?? Rc7 29.c4 Rc4 30.Rc4 dc4 31.Rc1 Rc8 32.d5 Bb4 Black plans c3 33.g4 c3 34.gf5 gf5 35.Kg3 Kf7 36.Kh4 c2 37.Kg5 Ba3 38.Rd1 c1Q 39.Rc1–+ Bc1 40.Kf5 Be3 41.Ke4 Bg1 42.h3 a4 43.Ke5 a3 44.d6 Rd8 45.Kd5 a2 46.Kc6 a1Q 47.Kc7 Qa8 48.d7 Ke6 49.f5 Kf5 50.h4 Ke6 51.h5 Kd5 52.h6 Qb8# 0–1. wk1234 – roger989, kurnik, 2012.

7.Bg2 c6 8.0–0 c5 9.d4 c4 10.Nbd2 d5 11.Nh4 Nfd7 (better is 11...Qc8!? 12.Ba3 Re8=) 12.Nc4!+/– Qc7 (12...dc4 13.Bb7 Pinning (13.Bb7 Deflection)) 13.Ne3 e6 14.c4! dc4 15.f3?? (15.Rc1!? Bg2 16.Nhg2+/–) 15...Nf6?? (better is 15...g5 16.Nhf5 ef5 17.Nf5 Re8–/+) 16.Rc1= Bd5 17.f4 Nbd7 18.Bd5?? ed5–/+ 19.g4 Rac8 20.g5+= Ne4 21.Nd5 Qd6+= 22.Ne3? Qd4?? 23.Bd4+– Bd4 24.Qd4 Nec5 25.Nd5 Rfe8 26.Rc4 Re4 27.Qc3 Re2 28.Ne7! Re7 29.Nf3 Ree8 30.h4 Na4 31.Qb4 Ndc5 32.Ne5 Rcd8 33.Nc6 Rd3 34.Na7 Ree3 35.Rf2 Rb3 36.Qd2 Rbd3 37.Qa2 Re1 38.Kg2 Ree3 39.Nc8 Rg3 40.Kf1 Rd1 41.Ke2 Rdd3 42.Rc2 Kf8 43.Nb6! Nb6 44.Rc5 Nd5 45.Rd5 Rd5 46.b6 Rdd3 47.b7 (47.b7 Rge3 48.Kf1 Rd1 49.Kg2+–) 1–0. wk1234 – aser0et, kurnik, 2012.

7.Bg2 c6 8.Nh4 Qc7 9.0–0 cb5 10.ab5 Bg2 11.Ng2 a6 12.Nc3 a5 13.e3 Qd6 14.Qf3 Ra7 15.Rfd1 Rc7 16.d4 e6?? (better is 16...Qb4 17.Ba3 Qc3 18.Be7 Nh5 19.Bf8 Bf8+=) 17.Ba3+– Rc5 18.dc5 Qc7 19.cb6 Qb6 (19...Qc3 20.Bf8 Bf8 21.Qf4+–) 20.Bf8 Bf8 21.Qf6 Bg7 22.Qf3 Bc3 23.Ra3 Bb4 24.Rb3 Qb5 25.Rdb1 Nc6 26.c3 a4 27.R3b2 a3 28.Rb3 a2 29.Ra1 Qc4 30.Rb4 Qc3 31.Ra4 Qa1–+ 32.Ne1 Qb2 33.Qd1= Ne5?? 34.f4 Nc4?? 35.Nd3 Qb3?? 36.Qb3+– Ne3 37.Qa2 Kg7+– 38.Ne5 d6 39.Nd7 Nd5 40.Qb2 f6 41.Ra7 Kh6 42.Nf6 Ne3 43.Qd2 Nd5 44.Nd5 ed5 45.Qd5 g5 46.Qg5# 1–0. wk1234 – besimzgatari, kurnik, 2012.

7.Bg2 d6 8.0–0 Nbd7 9.c4 e5 10.d4 ed4 11.Nd4 Bg2 12.Kg2 Ne5 13.Qc2 Qd7 14.f4 Neg4 15.Rf3 Rae8 16.h3? (better is 16.Raa3=) 16...Ne3–+ 17.Re3 Re3 18.Qd2? (18.Nd2 a5–+) 18...Rfe8 19.Nc3? Ne4 20.Qc2?? Nc3 21.Bc3–+ Bd4 22.Bd2 Re2 23.Kf1 Qh3# 0–1. wk1234 – romicas, kurnik, 2012.

7.Bg2 d6 8.0–0 e5 9.Nc3 Nfd7 10.Nh4 Bg2 11.Ng2 Bf6 12.e3 h5? (better is 12...c6=) 13.Qf3+– h4?? (13...e4 14.Qe4 d5 15.Qd5+–) 14.Nd5 hg3?? 15.Nf6 Nf6 16.Qa8 gh2 17.Kh2 Ng4 18.Kg1 Qg5 19.Qf3 Nd7 20.Qg3 Ndf6 21.f3 Kg7 22.fg4 Ng4 23.Rf3 Rh8 24.Kf1 Nh2 25.Ke2 Qh5 26.Rh1 Qf3 27.Qf3 Nf3 28.Rh8 Kh8 29.Kf3 Kg7 30.d4 f6 31.de5 fe5 32.Nf4 Kf7 33.Nd5 Ke6 34.Nc7 Kd7 35.Nd5 g5 36.Kg4 Ke6 37.Nc3 Kf6 38.Ne4 Ke6 39.Ng5 Kf6 40.Ne4 Ke6 41.c4 d5 42.cd5 Kd5 43.Nf6 Ke6 44.Kg5 Kd6 45.Kf5 e4 46.Ne4 Kd5 47.Bd4 Kc4 48.Nd6 Kb4 49.e4 Ka4 50.e5 Kb4 51.e6 Kb3 52.e7 Kc2 53.e8Q Kd3 54.Bg7 a5 55.Qa8 Ke3 56.Nc8 Kd3 57.Nb6 Kc2 58.Qa5 Kb3 59.Qa4# 1–0. wk1234 – aser0et, kurnik, 2012.

7.Bg2 d6 8.0–0 e6 9.Ng5 Bg2 10.Kg2 Nd5 11.Bg7 Kg7 12.e3?? (better is 12.f4=) 12...Qg5–+ 13.Qf3 Nd7 14.c4 Ne5 15.Qe2 Ne7 16.f4 Qg4 17.Qg4 Ng4 18.h3 Nf6 19.Nc3 d5 20.cd5 Ned5 21.Nd5 Nd5 22.e4 Nb4 23.Rab1 c5 24.d4 Rfd8 25.dc5 bc5 26.Rfc1 Rd2 27.Kh1 Nd3 28.Rc3 Rc8 29.b6 ab6 30.Rb6 Nf2 31.Kg1 Ne4 32.Rc4 Ng3 33.a5 Nf5 34.a6 Ra2 35.Rc1 c4 36.Kf1 c3 37.Ke1 Rh2 38.a7 Rh1 39.Ke2 Rc1 40.Rb8 Nd4 41.Kd3 Rd1 42.Ke3 Nf5 43.Ke2 c2 44.Rc8 Nd4 45.Kf2 (45.Kf2 Ra1 46.Ke3 Nf5 47.Kd2 Ra7 48.Rc2–+). wk1234 – delnik, kurnik, 2012.

7.Bg2 d6 8.Nc3 e5 9.d3 Nbd7 10.0–0 Re8 11.e4 Nc5 12.Nd2 d5 13.ed5 Nd5 14.Nd5 Bd5 15.Re1 Bg2 16.Kg2 Qd7 17.Nf3?? Increases the pressure on e5 (17.Nc4 Qd5 18.Kg1 a6=) 17...f6?? (better is 17...e4 18.Bg7 ef3 19.Qf3 Kg7–+) 18.Qb1 Rad8 19.Ba3 Ne6 20.Qb3 Qd5 21.Qd5 Rd5 22.Rad1 Nd4 23.c4 Nf3 24.Kf3 Rd7 25.c5 Red8–/+ 26.c6 Rd3 27.Rd3 Rd3 28.Re3 Re3 29.Ke3 f5?? 30.f4 Kf7 31.fe5?? Be5–/+ 32.Bb4 Ke6 33.a5? Kd5 34.ab6 ab6 35.Be7 Kc4 36.g4 Kb5 37.gf5 gf5 38.Kd3 Kc6 39.Kc4 b5 40.Kb3 Kb6 41.h4 c5 42.Bd8 Kc6 43.Be7 c4 44.Kc2 Bd6 45.Bf6 f4 46.Bd4 f3 47.Bf2 h5 48.Kc3 Kd5 49.Kd2 b4 50.Ke3 b3 51.Kd2 Bb4 52.Kc1 Ke4 53.Kb2–+ Kd3 54.Bg3 Ke2 55.Be5 Plans Be1 55...f2 56.Bc3 Bc3 57.Kc3 f1Q 58.Kc4 (58.Kc4 b2 59.Kb3 b1Q 60.Kc3 Qd3 61.Kb4 Qfb1 62.Kc5 Qbb5#; 58.Kd4 Qf6 59.Kc4 b2 60.Kd5 b1Q 61.Kc5 Qbb6 62.Kd5 Qbd4#). wk1234 – romicas, kurnik, 2012.

7.Bg2 Ne4 8.Bg7 Kg7 9.0–0 Nf6 10.c4 c6 11.Qc2 cb5 12.ab5 d5 13.Ne5 Nbd7 14.f4 Ne5 15.fe5 Ne4 16.Be4 de4 17.Qc3 e6 18.d3 e3 19.d4 Qc7 20.Na3 Rad8 21.Qe3 Rd7 22.Qf4 a6 23.Qf6 Kg8 24.Rfc1 ab5?? 25.Nb5 Qc6 26.Nd6?? Qg2# 0–1. wk1234 – wiol11a, kurnik, 2011.

7.Bg2 Ne8 8.0–0?? (better is 8.Bg7 Ng7 9.0–0+=) 8...Bb2–+ 9.Ra2 Bg7 10.c3 d6 11.Qb3 Nd7 12.Ng5 Bg2 13.Kg2 e6 14.d4 (14.f4–+) 14...Qg5 15.Nd2 Qd5 16.Qd5 ed5 17.e3 a6 18.c4 ab5 19.cb5 Nef6 20.Nf3 Ne4 21.Nh4 Nc3 22.Ra3 Na4 23.Rfa1 f5 24.Ra4 Ra4 25.Ra4 g5 26.Nf3 f4 27.Ng5 fg3 28.hg3 Rc8 29.Ne6 Bh8?? 30.Ra7+= Exerts pressure on the backward pawn 30...Kf7 31.Nc7 Ke7 32.Nd5 Ke6 33.Nf4 Ke7 34.Nd5 Ke6 35.Nf4 Ke7 36.d5?? Kd8 37.Ne6= Ke7 38.e4 Rc4 39.f3 Rc2 40.Kh3 Bc3 41.Nc7 Ba5 42.Kg4 Kf6 43.Ne6?? Ne5–+ 44.Kf4?? Rf2 45.Ke3–+ Rf3 46.Kd4 (46.Kd4 Bc3#). wk1234 – simiolek, kurnik, 2012.

7.Bg2 Bf3 8.Bf3 c6 9.bc6 Nc6 10.0–0 Rc8 11.d4 d5 12.c3 Ne4 13.Be4 de4 14.Nd2 f5 15.f3 e3 16.Nc4 Na5 (16...Nd4!? 17.Ne3 Ne6+=) 17.Ne3 f4 18.gf4 Rf4 19.Qb3?? (better is 19.Qd3+=) 19…Nb3–+ (19...Nb3 20.Ra3 Na5–+) 0–1. wk1234 – wiol11a, kurnik, 2011.

7.Bg2 Nh5 8.Bg7 Ng7 9.0–0 e6 10.Ne5 Qf6?? (better is 10...Bg2 11.Kg2 a6=) 11.Ng6 (better is 11.Bb7 Nc6 12.bc6 Qe5 13.d4+– (13.Ba8?! Qa1 14.Bb7 Qa4+–)) 11...hg6?? (better is 11...Bg2 12.Kg2 fg6–+) 12.Bb7+= Qa1 13.Ba8 Nc6 14.Bc6 dc6 15.Nc3 Qd1 16.Rd1 cb5 17.ab5 Nf5 18.Ra1 Rd8 19.d3 Ra8 20.g4 Nd6 21.e4 c6 22.bc6 Rc8 23.Ra7 Rc6 24.Ra8 Kg7 25.Ra3 b5 26.Rb3 b4 27.Na2 Rc2 28.Nb4 Rc1 29.Kg2 Nb5 30.Nc6! Rc6 31.Rb5 Rc3 32.d4 Rc4 33.d5 ed5 34.ed5 Rd4? 35.Kf3+– Kf6 36.Ke3 Rd1? 37.f4+– Re1 38.Kf3 Rd1 39.h4 Ke7 40.Ke4 Kd6? 41.Rb6 Kc5 42.Rc6 Kb5 43.Rc7 Kb6 44.Rf7 Kc5 45.Rd7 Re1 46.Kf3 Rd1 47.f5 gf5 48.gf5 Rf1 49.Kg4 Rg1 50.Kh5 Rf1 51.Kg6 Rh1 52.h5 Rg1 53.Kf6 Rh1 54.Kg5 Rg1 55.Kh6 Rh1 56.f6 Rf1 57.f7 Kd4 58.Kg7 Ke5 59.h6 Rg1 60.Kh8 Kf6 61.h7 Rd1 62.f8Q Kg5 63.Qg7 Kh4 64.Qf6 Kh3 65.Qf3 Kh2 66.Qd1 (66.Qd1 Kg2 67.Qe2 Kg3 68.Rg7 Kf4 69.Rg4 Kf5 70.Qe6#; 66.Rg7 Rd5 67.Qg2#) 1–0. wk1234 – mecsls, kurnik, 2012.

3.a4 g6??

4.Ra3?? Nf6= 5.g4?? (5.e4 Bg7 (worse is 5...Be4 6.Qe2+/–) 6.f3 0–0=) 5...Bg7?? (better is 5...Bh1 6.g5 a5–+) 6.f3+= 0–0 7.g5 Nh5 8.Rc3? (better is 8.Bg7!? Ng7 9.Nh3+=) 8...Bc3–+ 9.Nc3 e6 10.h3?? (better is 10.Nh3–+) 10...Qg5 11.Rh2 Nc6 (better is 11...Qg1 12.Rg2 Qh1 13.e3–+) 12.Qa1 (12.Ne4 Qh4 13.Nf2 Qb4 14.Qa1–+) 12...Nb4 13.Kd1 (13.Rg2 Qh4 14.Kd1–+) 13…Qg1 (13...Qg1 14.Kc1 Qh2–+) 0–1. xtom – rodebert (1765), kurnik, 2011.

4.Ra3?? Bg7?? 5.Rc3 (better is 5.Bg7 Nf6 6.Bh8+–) 5...Bc3–/+ 6.Nc3 Nf6 7.h4 h5 8.e3 Nc6 9.b5 Na5 (9...Nb4 10.d3–+) 10.Qa1 (10.Nf3 a6–/+) 10...d6 11.Be2? (better is 11.Qd1!?–+) 11...Bg2 12.Rh2 Bb7 13.Nf3 Qd7 14.Rg2 0–0–0 15.Rg5 (15.e4 Rhe8 16.d3 d5 17.ed5 Nd5 18.Nd5 Bd5–+) 15...Qh3 16.Bf1? Qf3 17.Ne2 Ng4 18.Rg4 hg4 19.Bh8 f6 20.Bg7 Qh1 21.Bh6 Bg2 22.Ng3 Qh2 23.Qd4 Bf1 24.Kf1?? Qh4 25.Bf4 e5 26.Qd5 ef4 27.Ne4 Qh1 28.Ke2 Qf3 29.Kd3 fe3 30.de3 Qd1 31.Kc3 Qd5 0–1. xtom – jjklee (1645), kurnik, 2011.

4.Bh8 e6 5.b5 +–.

4.Bh8 f6 5.e3 (5.Ra3 Nh6+–) 5...e5? (5...Nh6+–) 6.Qg4 Qe7 7.Bc4 (7.b5 a6 8.Qc4 d5+–) 7...d5 (7...Qb4 8.Nc3 Nh6+–) 8.Be2 Nd7 9.Qh4 (9.b5 Nh6 10.Qh3 Kf7+–) 9...0–0–0 10.Nc3 h5 11.Bf3 c6 12.b5 e4 13.bc6 Bc6 14.Be2 Qh7 15.Ba6 Bb7 16.Bb7 Kb7 17.Nd5 Qh8 18.Qe4 Kb8?? 19.Qf4 Ka8 20.Nc7 Kb7 21.Nd5 Ne5?? 22.e4 Bc5 23.Rb1 g5 24.Qf5 Rd6 25.Ne2 Nh6 Black prepares the advance g4 26.Qh3 Nhf7 27.d4 g4 28.Qh4 Nc4 29.dc5 Rd5 30.ed5 Qe8 31.Qf6 Nfe5 32.0–0 Qf7 33.Qf7 Nf7 34.c6 Kc7 35.Rbd1 Nfd6 36.Nd4 a5 37.Nb5 Kc8 38.Nd6 Nd6 39.Rde1 1–0. wk1234 – delnik, kurnik, 2012.

3.b5 a6

4.a4 a5 5.e3 e6 6.Nf3 f5 7.Bc4 (7.Bd3 Nf6+=) 7...Nf6 8.0–0 Be7 (8...d5 9.Bb3 Nbd7 10.d4=) 9.d4 (9.Nc3 d5 10.Be2 c5+=) 9...0–0 10.Nbd2 d5 11.Bb3 Ne4 (11...Qe8 12.c4+=) 12.Ne4+= fe4 13.Ne5 Nd7 14.c4 Nf6 (14...Bd6 15.cd5 ed5 16.Qg4 Be5 17.de5+=) 15.cd5 (better 15.Qc2+–) 15...Bd5? (better 15...ed5!? 16.f4 ef3 17.Rf3 Bd6+–) 16.Nc6+– Qd7 17.Ne7 Qe7 18.Ba3 Qf7 19.Bf8 Rf8 20.Rc1 h5 (20...h6 21.Rc3+–) 21.Qc2 (21.f3 ef3 22.Bd5 ed5 23.Qf3 Qe7+–) 21...Qg6 22.h3 Nh7?? (better 22...Bb3 23.Qb3 Nd5+–) 23.Bd5 ed5 24.Qc7 Ng5 (24...Rf5 25.Qd8 Rf8 26.Qd5 Qf7 27.Qd6+–) 25.Kh2 (25.Rc6 Rf6+–) 25...h4 (25...Ra8 26.Rc6 Qf7 27.Qb6+–) 26.Rc6 Qh5 (26...Qf5 27.Qb6 Nf7 28.Qa5+–) 27.Qb6 Qe2 (27...Qf7 28.Qa5 Qf5 29.b6+–) 28.Kg1 Rf2 (28...Rf5 29.Qd8 Kh7+–) 29.Qd8 Kh7 30.Rf2 Qe1 31.Kh2 Qe3 (31...Qf2 32.Qg5 Qf8 33.Qh5 Kg8 34.Re6 Qb8 35.Kg1 Kf8 36.b6 Qd8 37.Qh8 Kf7 38.Qd8 Ke6 39.b7 Kf5 40.b8Q Kg6 41.Qe5 Kh6 42.Qh4 Kg6 43.Qhh5) 32.Qe8 Qg3 (32...Nf3 33.Rf3! Qg5 34.Rf8 Qg3 35.Kg1 Qe1 36.Rf1 Qe3 37.Kh1 Qg5 38.Rf8 Qc1 39.Rc1 Kh6 40.Rc6 Kg5 41.Qe5) 33.Kh1 Qf2 34.Qh5 Kg8 35.Rc8 Qf8 36.Rf8 (36.Rf8 Kf8 37.Qg5 Ke8 38.b6 Kf7 39.b7 e3 40.b8Q e2 41.Qf5 Ke7 42.Qbf8) 1–0. Massudy (2570) – FitzwilliamDarcy (2225), lichess.org, 2020.

4.a4 a5 5.e3 e6 6.Nf3 Nf6 7.c4 Bb4 8.Bd3 (8.Be2 0–0=) 8...c5 9.0–0 0–0 10.Qc2 (10.Na3 d5=) 10...d5 (10...Bf3 11.gf3 d5 12.cd5 ed5 13.Kg2=+) 11.Ng5 g6 (11...dc4 12.Bh7 Kh8 13.Bf6 Qf6 14.Be4 Qg5 15.Bb7+=) 12.Be2 (12.Nc3 Ng4 13.f4 h6+=) 12...Nbd7 13.Bf3 e5 14.cd5 Bd5 (14...Nd5 15.Ne4 Qe7 16.Nec3=) 15.Nc3+= Bf3 16.Nf3 Qe7 17.Ne4 (17.d3 Rac8+=) 17...Rad8 (17...Ne4 18.Qe4 Rae8 19.Rad1=) 18.Nf6 Qf6 19.d4 ed4 (19...cd4 20.ed4 Rc8 21.Qe4 ed4 22.Bd4=) 20.ed4+= Qf4 21.dc5 Nc5 22.Be5 Qe4 (better 22...Qg4!?=) 23.Qe4+– Ne4 24.Bc7 Rd7 (24...Rd5 25.Bb6 Rb8 26.Be3+–) 25.Bb6 Rb8 (25...Nc3 26.Be3+–) 26.Ne5+– Rd6? (better 26...Rdb7 27.Bd4 Re8+–) 27.Bc7 Rbd8 (27...Re8 28.Bd6 Bd6 29.Nc6+–) 28.Bd8 (worse 28.Bd6 Rd6 29.Rfd1 Re6+–) 28...Rd8 29.Nc6 Rd3 30.b6 Bc3 (30...Nc5+–) 31.b7 Ba1 32.b8Q Kg7 33.Ra1 Nf2 34.Qb2 (34.Qb2 f6 35.Qf2+–) 1–0. DEFFM – GuestCGTK, freechess.org, 2018.

4.a4 ab5 5.ab5 c6 6.Ra8 Ba8 7.e4 c5 (7...cb5 8.Bd3=) 8.Nc3+= d6 (8...Nf6 9.e5 Nd5 10.Qa1+–) 9.Qa1+– Nd7 (9...Bb7 10.Qa7 Qc8 11.Qb6+=) 10.Nd5 Bd5 11.Bg7 (worse 11.ed5 Ngf6+=) 11...Bg7 (11...Be4 12.d3 Bg7 13.Qg7+–) 12.Qg7 Be4 13.Qh8 (13.c3!?+–) 13...Ndf6+= 14.d3 Bd5 15.Ne2 e5 (15...Qa8 16.Nc3+=) 16.c4 Be6 17.Nc3 Qa8 18.Kd2 d5 19.cd5 Bd5 20.Qg7 Qa1 21.Kc2 Qa8 22.Qg5 Kf8 (22...Kd7 23.Qe5 Qa3 24.Nd5 Qa2 25.Kd1 Nd5 26.g3+–) 23.Qe5 (23.Nd5?! Qd5 24.Kc1 Qd4+=) 23...Bg2? (better 23...Qa3 24.Nd5 Qa2 25.Qb2 Qd5+–) 24.Qd6 Kg7 (24...Ne7 25.Rg1 Bf1 26.Qf6 Bg2 27.Qh8 Ng8+–) 25.Rg1 Kh8 26.Rg2 c4 (26...Qe8 27.Qb6 Nd7 28.Qd6+–) 27.dc4 Qa1 (27...Qf3 28.Qb6 Qf5 29.Bd3 Qh3+–) 28.Qf8 (28.Qf8 Qa4 29.Na4 Ng4 30.Rg4 h6 31.Qg8) 1–0. DEFFM – toniovan, freechess.org, 2020.

4.a4 ab5 5.ab5 c6 6.c4 cb5 7.cb5 e6 8.e3 d5 (8...Ra1 9.Ba1 Nf6 10.Nf3=) 9.Nf3 (better 9.Ra8 Ba8 10.Nf3=) 9...Bc5?? (better 9...Ra1 10.Ba1 Nf6=) 10.Ra8+– Ba8 (10...Nf6 11.Bf6 gf6 12.Ra7+–) 11.Bg7 Nf6 12.Bh8 Ne4 13.Bd4 (13.d3 Bb4 14.Nbd2 Nd2 15.Nd2 Nd7+–) 13...Nd7 14.Bc5 Nec5 (14...bc5 15.Be2+–) 15.Nd4 (15.d4 Ne4+–) 15...Qc7 16.Be2 (16.Nf3 Ne4+–) 16...Nf6 (16...e5 17.Nf5+–) 17.Nc3 (17.0–0!? Nce4+–) 17...e5 18.Nf3 (18.Qa1 Bb7 19.Nf3 d4 20.ed4 ed4+–) 18...e4 (18...d4 19.ed4 ed4 20.Na4+–) 19.Nd4 Nd3 (19...Bb7 20.0–0+–) 20.Bd3 ed3 21.Qb1 Ng4 (21...Ne4 22.Qd3 Bb7 23.0–0+–) 22.Qd3 Nh2 (22...Nf6+–) 23.Qh7 Ng4 24.Qg8 Ke7 25.Qg4 (25.Qa8 Nf6 26.Rh8 Kd6+–) 25...Bb7 26.Qg5 Kd6 27.Qf4 Kd7 28.Qc7 (28.Qf7 Kc8 29.Rh8 Qd8 30.Rd8 Kd8 31.Ne6 Kc8 32.Qe8) 28...Kc7+– 29.Rh7 Kd8 30.Rf7 Bc8 31.Rf8 (better 31.Nd5 Ke8 32.Re7 Kf8+–) 31...Kd7 32.Rc8! Kc8 33.Nd5 Kd7 34.Nb6 Kd6 35.Na4 Kc7 36.b6 Kb7 37.g4 Kb8 38.g5 Kb7 (38...Kc8 39.g6 Kd8 40.g7 Ke8 41.g8Q Ke7 42.Qg7 Ke8 43.b7 Kd8 44.b8Q) 39.g6 Kb8 (39...Kc8 40.g7 Kd8 41.g8Q Ke7 42.Qg7 Ke8 43.b7 Kd8 44.b8Q) 40.g7 Kb7 (40...Kc8 41.Nc5 Kd8 42.Nc6 Ke8 43.g8Q) 41.f4 (41.g8Q Ka6 42.Qa8) 41...Ka6 42.g8Q Ka5 43.Qg5 (43.Qd5 Ka4 44.Qc4 Ka5 45.Qb5) 43...Ka4 (43...Ka6 44.Qb5 Kb7 45.Nc5 Kb8 46.Qe8) 44.b7 (44.Qb5 Ka3 45.Qb3) 44...Kb4 (44...Ka3 45.b8Q Ka4 46.Qb3) 45.b8Q Kc4 46.Qbb5 1–0. AhmedSultanov (1760) – naceurmahdi (1745), lichess.org, 2019.

4.a4 ab5 5.ab5 e6 6.Ra8 Ba8 7.e3 c5 (7...Nf6 8.Nf3+=) 8.c4 d5 9.Nf3 dc4 (9...Nd7 10.Nc3+=) 10.Bc4 (10.Na3 c3 11.Bc3 Nf6+=) 10...Nf6+= 11.0–0 Bd6 12.Ng5 (12.Na3 Nbd7+=) 12...0–0 13.f4 Be7 (13...Nbd7 14.Nc3=) 14.Nc3 Nd5 15.Qg4 Bg5 (15...Nf6 16.Qe2+=) 16.fg5+– Ne7 17.Rf2 (17.Ne4 Ng6 18.h4 Bd5+–) 17...Ng6 18.d4 (18.Ne4 Qc7+=) 18...Nd7 (18...cd4 19.ed4 Nd7 20.h4+=) 19.Ba3 (19.h4!?+–) 19...Qc7+= 20.Rf7 (better 20.Rd2!?+=) 20...Rf7=+ 21.Qe6 Ndf8 22.Qf7 Qf7 23.Bf7 Kf7 24.dc5 bc5 25.Na4 c4 (25...Nh4 26.Nc5 Ne6 27.b6 Nc5 28.Bc5 Bg2 29.Kf2–/+) 26.Nb6= Be4 27.Nc4 Ke6 28.b6 (28.Nd6 Bd3=) 28...Nd7=+ 29.Nd6 (29.Bb2 Nh4 30.Bg7 Bg2=+) 29...Bc6 30.b7 (30.Ne8 Nh4 31.Ng7 Kf7=+) 30...Nb8 (30...Nge5 31.e4–/+) 31.Kf2 Ne5 32.Kg3 Nf7 (32...Na6 33.Kf4=+) 33.Nf7= Kf7 34.Bd6 Na6 35.b8Q Nb8 36.Bb8 Kg6 37.Be5 Be4 38.Bd4 Kf7 39.Kf2 g6 40.g4 Ke6 41.Kg3 Kd5 42.Kf4 Bd3 43.Bf6 Bc2 44.h3 Bd3 45.h4 Ke6 (45...Bc2 46.h5=) 46.e4+= Bc2 47.Bd4 (47.Bc3 Kd6+=) 47...Bb1 (47...Kd6 48.Bb2+=) 48.Ke3 Bc2 49.h5 (49.Bc3 Kd6+=) 49...Bb1 (49...Bd1 50.Ba7=) 50.Kf4 Bc2 51.hg6 hg6 52.Ke3 (52.Bc5 Bd3+=) 52...Bd1= 53.Kf4 Bc2 54.Bf6 Bd3 55.Ke3 Bc2 56.Bc3 Bd1 (56...Kd6 57.Kf4=) 57.Kf4+= Bc2 58.e5 (58.Bd4 Kd6+=) 58...Bd3= 59.Ke3 Bc2 60.Bd4 Bd1 61.Kf4 Be2 62.Bc5 Bd1 63.Bf8 Be2 64.Bb4 Bd1 65.Bc5 Be2 66.Bb4 Bd1 67.Bc5 Bc2 68.Bb4 Bb1 69.Bc5 Ba2 70.Bb4 Bd5 71.Bc5 Bc4 72.Bb4 Bd5 73.Ba5 Bc4 74.Bb6 Bd5 75.Bc7 Bc4 76.Bd8 Bd5 77.Bc7 Bc4 78.Bb6 Bd5 ½–½. GuestTWLL – elmerski, freechess.org, 2019.

4.a4 ab5 5.ab5 e6 6.Ra8 Ba8 7.Nf3 Nf6 8.e3 c5 (8...Bb4 9.Be2=) 9.c4 (9.Be2 d5=) 9...d5 10.Nc3 (10.d3 Bd6=) 10...dc4 11.Bc4 Bd6 12.0–0 0–0 (12...Nbd7 13.d3=) 13.h3 (13.Qe2 Nbd7=) 13...Nbd7 14.d4 (14.d3 Qc7=) 14...Bf3 (14...Qe7 15.Na4=) 15.Qf3 cd4 16.ed4 Qc7 (16...Qe7 17.Ra1=) 17.Bb3 (17.Bd3 Bh2 18.Kh1 Bf4+=) 17...e5 (17...Rc8 18.Rc1=) 18.Nd5+= Nd5 (18...Qb8 19.de5 Be5 20.Ne7 Kh8 21.Nc6+–) 19.Qd5 (19.Rc1 Nc3 20.Rc3 Qd8+–) 19...Nf6 (19...Qb8 20.Qc6 Rd8 21.Qc4+–) 20.Qc6+– e4 (20...Re8 21.Qc7 Bc7 22.Rc1+–) 21.Qc7 Bc7 22.Rc1 Rc8 (better 22...Bf4!? 23.Rc6 Nd7+–) 23.d5+– Kf8?? (23...Ne8 24.Be5! Kf8+–) 24.d6! e3 (24...Bd6 25.Rc6 Double attack (25.Rc8 Pinning; 25.Rc8 Deflection; 25.Rc6 Decoy)) 25.Rc7 e2 (25...ef2 26.Kf1 Rd8 27.Rf7 Ke8 28.Re7 Kf8+–) 26.Rc8 Ne8 27.Bg7! Kg7 28.Re8 1–0. DEFFM – GuestJKGF, freechess.org, 2018.

4.a4 d6 5.e3 Nd7 6.d4 Ngf6 (6...ab5 7.ab5 Ra1 8.Ba1=+) 7.Nf3 g6 (7...e6 8.Bd3=) 8.c4 (8.Bd3 Bg7=) 8...Bg7 9.Be2 0–0 10.Qc2 (10.0–0 c5=) 10...c5 (10...Be4 11.Qb3=) 11.Nbd2 (11.bc6 Bc6 12.Nc3 Rc8=) 11...cd4 12.ed4 Qc7 13.0–0 d5 (13...Nh5 14.Rfc1=) 14.Ne5 1–0. DEFFM – GuestLTTJ, freechess.org, 2016.

4.a4 ab5 5.ab5 Ra1

6.Ba1 c5 7.e3 (7.c4 e6=) 7...d5 8.Nf3 e6 9.c4 (9.Be5 Nd7 10.Bf4 Be7=+) 9...Nf6 (9...Nd7 10.Bd3=+) 10.cd5 Bd5 11.Nc3 Be7 (11...Bb7 12.Bb2=) 12.Nd5+= Qd5 13.Qc2 0–0 14.Bc4 Qe4 (14...Qb7 15.0–0+=) 15.Bd3 Qb7 (15...Qg4!? 16.0–0 Nbd7+=) 16.Bf6+– Bf6 17.Bh7 Kh8 18.Be4 Qc7 (18...Qa7 19.g4 Qa1 20.Qd1 Qd1 21.Kd1+–) 19.0–0 (19.h4 Qa7+–) 19...Nd7 20.d4 Rc8 21.Rc1 Bd8 22.d5 ed5 (22...Bf6 23.de6 fe6 24.Qa2+–) 23.Bd5 Ne5 (23...Nf8 24.Qf5 g6 25.Qf7 Qf7 26.Bf7+–) 24.Ne5 Qe5 25.Bf7 Qf6 (25...Bf6 26.Rd1+–) 26.Bd5 (26.Bc4 g6+–) 26...Bc7 (26...Qe5 27.Rd1+–) 27.g3 Rd8 28.Bc6 (28.Rd1 g5+–) 28...Rf8 (28...Qe5 29.Bf3+–) 29.f4 (29.Rd1 g6+–) 29...Qe6 (29...Rd8 30.Rd1+–) 30.Qe2 Rf7 (30...Rd8+–) 31.Qh5 Qh6 (31...Kg8 32.Bd5 Qf6+–) 32.Qf7 (32.Qf7 c4 33.Bd5 Kh7 34.Be4 Qg6 35.Qg6 Kg8 36.Qe8) 1–0. GuestMLVY – unclegogo, freechess.org, 2020.

6.Ba1 d5 7.c4 dc4=+ 8.e3 Nd7 9.Nf3 Ngf6 10.Bc4 e6 11.0–0 Bc5 (11...Qa8 12.Bc3=) 12.d4 Bd6 13.Nbd2 0–0 14.Bd3 (14.Qc2 c6+=) 14...Nb8 (14...Nd5 15.Qb1 f5 16.Rc1=) 15.Nc4 (15.Qc2 Kh8+–) 15...c5 (15...Be7!?+=) 16.Nd6+– Qd6 17.dc5 bc5?? (better 17...Qc5 18.Bd4 Qe7+–) 18.Bh7!+– Kh7 (18...Nh7 19.Qd6) 19.Qd6 Bf3 (19...Rc8 20.Ng5 Kg6 21.Qe7 Kg5 22.Qf7+–) 20.Qf8 Bg2 21.Qf7 (21.Bf6!? gf6 22.Qf7 Kh6 23.Qf6 Kh7+–) 21...Ne4 22.Qg7 1–0. BeepBeepImAJeep (2565) – nitshe, lichess.org, 2017.

6.Ba1 d5 7.e3. GuestCGND – GuestFDYG, freechess.org, 2019.

6.Ba1 e6 7.e3 Nf6 8.c4 Be7 9.Nf3 0–0 10.Be2 d5 11.0–0 dc4 12.Bc4 Nbd7 13.Nc3 Nc5 (13...Bd6 14.d4=) 14.d4 Nce4 15.Qc2 Nc3 16.Bc3 Bf3 17.gf3 h6 (17...Qd7 18.Rc1=) 18.Kh1 (18.Ra1 Qd6=) 18...Nh7 (18...Qd7 19.Rc1=) 19.Rg1 Bh4? (19...Nf6 20.e4+=) 20.Qb2 (better 20.d5!? Bf6 21.de6 fe6 22.Be6 Kh8 23.Bb4+–) 20...Bf6 21.Bd3 Ng5 22.f4 (22.Rg3 Qd5 23.Qc2 e5 24.de5 Be5 25.Be5 Qe5+=) 22...Nf3 23.Rg3 Nh4 (23...Qd5!? 24.Rg2 Rd8=) 24.d5 Bc3 25.Qc3 f6? (better 25...g6!? 26.de6 Qd5 27.e4 Qe6+–) 26.de6+– Qd5 27.Kg1 (better 27.e4 Qd6 28.f5+–) 27...Qe6?? (27...Nf3 28.Kf1 Nh2 29.Ke2 Kh8+– (29...Qe6?? 30.Bc4 Qf7 31.Rg2+–)) 28.Bc4+– (28.Qc7?! Rf7 29.Qb8 Rf8+–) 28...Qc4 (28...Qf7 29.Bf7 Rf7 30.Qc6+–) 29.Qc4 Kh7 30.Qc7 (30.Qc7 Nf5 31.Rh3+–) 1–0. AhmedSultanov (1730) – keremgenc (1710), lichess.org, 2019.

6.Ba1 f6 7.e3 e5 8.d4 e4 9.Nh3 d5 (9...f5 10.Be2=) 10.Nf4+= Bd6? (better 10...Ne7+=) 11.Qh5+– Kd7 12.Ng6! Ne7 (12...hg6 13.Qg4 Double attack (13.Qh8 Pinning; 13.Qh8 Deflection; 13.Qg4 Decoy)) 13.Qh3 Ke8?? (better 13...f5 14.Nh8 Qh8+–) 14.Nh8 Bc8 (14...Kf8 15.Qh7 Qd7 16.Be2+–) 15.Qh5 g6 (15...Kd7 16.Qg4 f5 17.Qg7+–) 16.Qh7 Bf5 (16...Be6 17.Ng6 Nd7 18.Qh8 Ng8 19.Nf4 Bf4 20.ef4+–) 17.Qf7 Kd7 18.Qf6 Qg8 19.Nf7 Kc8 (19...Nc8 20.Nd6 Nd6+–) 20.Nd6 (20.Nd6 Kd8 21.Nf7 Ke8 22.Nh6+–) 1–0. DEFFM – GuestQNRN, freechess.org, 2018.

6.Ba1 c6

7.c4 cb5 8.cb5 d6 9.e3 e5 10.Nf3 Nf6 11.Be2 Be7 12.Rg1 (better 12.d4!? e4 13.Nfd2=) 12...0–0–/+ 13.Bb2 Nbd7 14.d4 (14.Nc3 Qc7–/+) 14...e4 (14...Qc7 15.Qc1 Qb8 16.Nc3–/+) 15.Nfd2 d5 16.g3 h6 (16...Bd6 17.Qa4–/+) 17.Kf1 Nh7 (17...Bd6 18.Kg2=+) 18.Kg2 Ndf6 19.Nc3 (19.Qb3 Qd7=+) 19...Bc8 (19...Qd7 20.Na4 Bd8 21.Ba3=+) 20.h4 (20.Qb3 Ng5 21.h4 Ne6=) 20...Qd7=+ 21.Rh1 Ng4?? (better 21...Bb7=+) 22.Bg4+– Qg4 23.Qg4 (23.Nd5?! Qe6 24.Ne7 Qe7+–) 23...Bg4 24.Nd5 Bd8 (24...Re8 25.Ne4 Bf5 26.Ne7 Re7 27.Nd6+–) 25.Ne4 f5 (25...Nf6 26.Ndf6 Bf6 27.Nf6 gf6 28.d5+–) 26.Nd6 (26.Nec3 Bh5+–) 26...Nf6 27.Nf6 Rf6 28.Ba3 Be7 29.Nc4 Bd8? (29...Ba3 30.Na3 Rf7 31.Nc4+–) 30.Ne5 (better 30.Rc1 Rf7 31.Ne5 Rc7+–) 30...Kh7 (30...Re6 31.Ng4 fg4+–) 31.Rc1 g5 (31...Re6 32.Rc8 Bf6 33.Ng4 fg4+–) 32.Rc8 gh4 (32...Be2 33.Rd8 f4 34.gf4 gh4 35.d5+–) 33.gh4 f4 34.Rd8 fe3 (34...Be2+–) 35.Ng4 e2 36.Nf6 Kg6 (36...Kg7 37.Re8 e1N 38.Re1 Kf6 39.d5 Kf5 40.d6 Kg6 41.d7 Kf6 42.d8Q Kf5 43.Qd3 Kg4 44.Be7 h5 45.Qe4) 37.Re8 Kf6 (37...e1N 38.Re1 Kf6 39.d5 Kf5 40.d6 Kf6 41.d7 Kg7 42.d8Q Kg6 43.Qd6 Kh5 44.Kf3 Kh4 45.Qh6) 1–0. GuestBXZC – GuestXKCD, freechess.org, 2020.

7.c4 cb5 8.cb5 e6 9.e3 Nf6 10.Nf3 Bc5 11.Be2 (11.Qa4 0–0=) 11...d6 (11...d5!?=) 12.0–0 0–0 (12...d5 13.Bf6 gf6 14.Nc3+=) 13.Qa4 Nbd7 (better 13...Bf3!? 14.Bf3 d5+=) 14.d4+– Bd4? (better 14...Qa8 15.Qa8 Ra8 16.dc5 Bf3 17.Bf3 Ra1 18.cd6 Kf8+–) 15.Qd4 Nc5 (15...Qc7 16.Nc3+–) 16.Nc3 (16.Rd1 Nb3 17.Qb2 Nc5+–) 16...Nb3 (16...e5 17.Qc4+–) 17.Qh4 (17.Qc4 Nc5+–) 17...Bf3 (17...Na1 18.Ra1 Qc7 19.Ra7+–) 18.Bf3 Nd2 (18...d5 19.Be2+–) 19.Rd1 Nf3 20.gf3 Qa8 (20...Qc7 21.Bb2+–) 21.Bb2 Qf3 (21...Rd8 22.Kg2 e5 23.Ne4 Ne4 24.Qe4 Qe4 25.fe4+–) 22.Rd6 Rc8 (22...Rb8 23.Qg3 Qg3 24.fg3+–) 23.Qg3 Qh5 (23...Qg3 24.hg3 Rb8 25.Na4+–) 24.Ne4 Qb5 (24...Ne8 25.Rb6 Qd1 26.Kg2 Qd8+–) 25.Nf6 Kf8 (25...Kh8 26.Rd2 Qf5+–) 26.Nd7 (26.Rc6! Rd8 27.Ba3 Qc5 28.Rc5 Rd1 29.Kg2 Rg1 30.Kg1 g6 31.Rf5 Kg7 32.Nh5 Kh8 33.Qb8) 26...Ke7 27.Ba3 Qb1 28.Rd1 Qb4 (28...Kd8 29.Rb1 Rc3 30.Nb6 e5 31.Qe5 Rc1 32.Rc1 g5 33.Rd1) 29.Bb4 (29.Bb4 Rc5 30.Qd6 Kd8 31.Nb6 Ke8 32.Qd8) 1–0. GuestJWKK – GuestCBNK, freechess.org, 2020.

7.c4 d5 8.d3 dc4 9.dc4 Qd1 10.Kd1 cb5 (10...Nf6 11.Nf3=+) 11.cb5 Nf6 12.Nd2 Nbd7 13.Ngf3 Bf3 (13...e6!?=+) 14.ef3 (14.gf3 e6=) 14...e6 15.Bd3 Bc5 16.Ne4 (16.Ke2 0–0+=) 16...Ne4 17.Be4 Bf2 18.Ke2 Bc5 19.Bc6 Ke7 20.f4 f6 21.Rd1 Rd8 22.g3 (22.Bc3 Bd6=) 22...Nb8 23.Rd8 Kd8 24.Be4 h6 (24...f5 25.Bg2 g6 26.Bf3=) 25.Kf3 Ke7 26.Bc3 Kd6 27.g4 Bg1 28.h4 (28.Kg2 Bc5=) 28...Nd7 (28...Kc5 29.Bd3=) 29.Bc6 Nb8 30.Be8 Nd7 31.g5 hg5 32.hg5 Ke7 33.Bd7 Kd7 34.gf6 gf6 35.Bf6 Kd6 36.Ke4 Kc5 37.Ke5 Bd4 (better 37...Be3=) 38.Ke6+– Bf6?? (better 38...Be3 39.Be7 Kb5+–) 39.Kf6+– Kb5 40.f5 Kc6 (40...Kb4 41.Ke5 Kc4 42.f6 Kc3 43.f7 Kd2 44.f8Q b5 45.Qb4 Ke2 46.Qb5 Ke3 47.Ke6 Kd4 48.Qb4 Ke3 49.Kd5 Kf3 50.Qe4 Kg3 51.Ke5 Kf2 52.Kf4 Kg1 53.Qe2 Kh1 54.Kf3 Kg1 55.Qg2) 41.Ke6 Kc7 42.f6 Kd8 (42...Kc6 43.f7 Kc5 44.f8Q Kc4 45.Qf4 Kd3 46.Qf5 Ke3 47.Kd6 Kd2 48.Qd5 Kc2 49.Qc4 Kd2 50.Qf7 b5 51.Qa2 Kc3 52.Qa3 Kd4 53.Qa5 Ke4 54.Qb4 Kf5 55.Qb5 Ke4 56.Qd5 Ke3 57.Ke6 Ke2 58.Qe4 Kf2 59.Kf5 Kg1 60.Qe2 Kh1 61.Ke4 Kg1 62.Kf3 Kh1 63.Qg2) 43.f7 (43.f7 Kc8 44.f8Q Kb7 45.Kd7 b5 46.Qd6 Ka7 47.Kc7 b4 48.Qb4 Ka6 49.Qb6) 1–0. GuestFTBB – GuestVYLL, freechess.org, 2020.

7.c4 d5 8.e3 dc4 9.Bc4 cb5 10.Bb5 Bc6 11.Qa4 Qd5 12.Bc6 (12.Nc3 Qg2 13.Qa8 Qh1 14.Bc6 Qc6 15.Qb8 Kd7 16.Qf8 Qg6+–) 12...Qc6= 13.Qg4 (better 13.Qc6 Nc6 14.Nf3=) 13...e6 (13...Nh6 14.Qf3=) 14.Nc3 (better 14.Qg3 Qc1 15.Ke2 Qc4 16.d3 Qa2 17.Nd2 Qa1 18.Qb8 Ke7 19.Ngf3+– (19.Qb6?! f5+–)) 14...Nf6 15.Qg3 g6?? (better 15...Nbd7=) 16.Qb8+– Ke7 17.Nf3 Bg7 (17...Nd7 18.Qf4+–) 18.Qa7 (18.Ne5 Qc8 (18...Rb8?? 19.Nc6 Kd6 20.Nb8+–) 19.Qa7 Nd7+–) 18...Kf8 (18...Nd7 19.Qa3 Qc5 20.Qb3+–) 19.0–0 (19.Ne5 Qe8+–) 19...Nd7 20.Bb2 (20.Rc1!? e5+–) 20...Bf6 21.Nd4 Bd4 22.ed4 Kg7 (22...Kg7 23.d5 Qc8 24.de6 Ne5+–). GuestKNZL – GuestPQFL, freechess.org, 2018.

7.c4 d5 8.e3 dc4 9.Bc4 cb5 10.Bb5 Bc6 11.Bc6 Nc6 12.Qa4 Qd7+=.

6.Ba1 d6

7.c4 Nd7 8.d4?? (8.Nf3 Ngf6=) 8...e6?? (better is 8...Qa8 9.e3 Qa1–+) 9.e3 Qe7 (9...Qa8!? 10.Nc3 Bg2 11.Bg2 Qg2+=) 10.Nf3+= f6 11.Be2 g6 12.0–0 Bg7 13.d5 e5 14.Bb2 Nc5 15.Ba3 Kd7 16.Bc5 bc5 17.Nc3 f5 18.Qb3 Nf6 19.Ng5 Ra8 20.h3 h6 21.Ne6+– Bh8 22.Qb2 Ne8 23.Ra1 Ra1 24.Qa1 Ng7 25.Ng7 Bg7 26.Qa7 Kc8 27.b6 e4 28.Nb5+/– cb6? 29.Qb6+– Bf6 30.Nd6 Kb8 31.Qc5 Be5 32.Nb7 Qb7 33.Qf8 Ka7 34.Qh6 Qb1 35.Bf1 f4 36.ef4 Bf4 37.Qf4 1–0. popovicigelu – pornpimon191, kurnik, 2011.

7.c4 e6 8.e3 Qg5 9.Nf3 Qf6?? (better is 9...Qg6=) 10.Bf6+– Nf6 11.Be2 Be7 12.0–0 Ng4 13.Nd4 Ne5 14.Qa4 0–0 (14...Nbd7 15.Qa7 Nc5 16.Nc6 Bc6 17.bc6 Nc6 18.Qc7+–) 15.Qa7 Be4 16.d3 Bg6 (16...Nd3 17.Qc7 Re8 18.Nd2+–) 17.Qc7 Bf6 18.Qd6 Nbd7 (18...Rd8 19.Qb6 Nd3 20.Nc6 Nc6 21.bc6+–) 19.Qa3 (19.Qa3 Nc5 20.f4 Ned3 21.f5+–) 1–0. ariank – mergim080, kurnik, 2012.

7.e3 Nd7 8.d4 Qa8 9.Nd2 Bg2 10.Bg2 Qg2 11.Qf3 Qf3 12.Ngf3+=.

7.e3 Nd7 8.d4 Ngf6 9.Nf3= g6 10.c4 Bg7 11.Be2 0–0 12.Nbd2 d5 (12...e5 13.0–0 e4 14.Ng5+=) 13.cd5 Bd5 14.0–0 c6 15.bc6 Bc6 16.Qb3 e6 17.Rc1 Bf3 (17...Qa8!?+=) 18.Bf3 (worse is 18.gf3 Nd5=) 18...Qb8 19.Ne4 (19.Qb5 Rc8 20.Nc4 Bf8+/–) 19...Ne4+= 20.Be4 Nf6 21.Bf3 Rd8 22.Rb1 Nd5 23.Bd5 ed5 24.Qb6 Qb6 25.Rb6 Ra8 26.Rb1 h5 27.g3 Bf8 28.Kg2 Ra5 29.Bc3+– Ra3 30.Bb4 Bb4 31.Rb4 Ra5 32.Rb8 Kg7 33.Rd8 Kf6 34.Kf3 Ke7 35.Rc8 Ke6 36.Rc6 Kf5? 37.h3 Rb5 38.g4 hg4 39.hg4 Kg5 40.Rc5 Rc5 41.dc5 Kf6 42.g5! Ke6 43.Kf4 f5 44.c6 Kd6 45.c7! Kc7 46.Ke5 Kc6 47.Kf6 Kc5 48.Kg6 d4 49.ed4 Kd4 50.Kf5 (50.Kf5 Kd5 51.g6 Kd4 52.g7 Kd5 53.f4 Kd4 54.Ke6 Ke4 55.f5 Kf4 56.f6 Kg4 57.g8Q Kf3 58.f7 Ke2 59.Qg4 Ke3 60.Qg3 Kd2 61.f8Q Kc1 62.Qd3 Kb2 63.Qfa3#) 1–0. popovicigelu – doberqani, kurnik, 2011.

7.e3 Nd7 8.Nf3 e5=.

7.e3 Nd7 8.f4 Qa8 9.Nc3 Bg2 10.Bg2 Qg2 11.Qf3 Qf3 12.Nf3 e6 13.Ne4 d5 14.Neg5 h6 15.Nh3 Ngf6 16.Rg1 g6 17.Ke2 Bg7 18.d4 0–0 19.Ne5 Ne5 20.fe5 Ne4 21.Nf4 Ra8 22.h4 h5 23.Kd3 Kh7 24.Bb2 Bf8 25.c4 Ra2 26.Rg2 Ba3 27.cd5 Rb2 28.Rb2 Bb2 29.de6 Nf2 30.Kc2 Ba3 31.ef7 Kg7 32.e6 Ng4 33.Kd3 Nf6 34.d5 Kh6 35.e4 g5 36.hg5 Kg5 37.Ne2 h4 38.Ke3 Kg4 39.Kf2 h3 40.Kg1 Ne4 41.Kh2 Bd6 42.Kh1 Nf2 43.Kg1 h2 44.Kf2 h1Q 0–1. jura1946 – oak1, kurnik, 2012.

7.Nf3 e5 8.d4 e4 9.Nfd2 d5 10.e3 f5 11.Be2 Nf6 12.0–0 Bd6 13.h3 0–0 14.c4 c6 15.bc6 Bc6 16.cd5 Bd5 17.Nc3 Bb7 18.Nb5 Nc6 (18...Be7 19.Qb3 Kh8 20.Nc3=) 19.Nc4 (19.Qb3!? Kh8 20.Nd6 Qd6 21.Qb6+/–) 19...Bb8 20.Bb2 Nd5 21.Ba3 Rf6 22.Ne5 Ne5–/+ 23.de5 Re6 24.Bd6+= Bd6 25.Nd6 Ba8? 26.Bc4 Re5 27.Nb5?? Kh8 28.Qa4 Nf6 29.Rd1 Qf8 30.Nc7 Bb7 31.Nd5?? Bd5–+ 32.Bd5 Rd5 33.Rd5 Nd5 34.Qc6 Qd8 35.Kh2 Qc7 36.Qc7 Nc7 37.Kg3 g5 38.f4 h6 39.Kf2 Nd5 40.Ke2 b5 41.fg5 hg5 42.Kd2 b4 43.g4 fg4 44.hg4 b3 45.Kc1 Ne3 46.Kb2 Ng4 47.Kb3 Ne5 48.Kc3 Nf3 49.Kc2 g4 50.Kd1 Nd4 51.Ke1 Nf5 52.Kf2 Kg7 53.Kg2 Kf6 54.Kf2 Ke5 55.Kg2 Kf4 56.Kf2 e3 57.Kf1 Kf3 58.Ke1 e2 59.Kd2 Kf2 60.Kd3 e1Q (60...e1Q 61.Kc4 Ne3 62.Kb5 Qc3 63.Ka4 Qc4 64.Ka5 g3 65.Kb6 Nd5 66.Ka5 Qc5 67.Ka4 Qb4) 0–1. iczker – elvis1986 (1690), kurnik, 2011.

6.Ba1 Nf6

7.c4 d6 8.e3 c5 9.Nf3 e5 10.Be2 Be7 11.0–0 Nbd7 12.d4 ed4 13.ed4 Qa8 14.d5 Qa1 15.Qc2 Ne5 16.Nc3 Qa8 17.Ne5 de5 18.Qf5 Bc8 19.Qg5 0–0 20.Bf3 Bd6 21.Ne4 Ne4 22.Be4 f6 23.Qh5 f5 24.Bf3 Qa4 25.Rc1 Qa3 26.Qg5 Bd7 27.h4 Be8 28.Rd1 Qb3 29.h5 Qc4 30.h6 Bg6 31.hg7 Kg7 32.g4 fg4 33.Bg4 Qc2 34.Qe3 Qe4 35.Qh3 Qf4 36.f3 e4 37.Rf1 Qe3 38.Kg2 ef3 39.Bf3 Qg5 40.Kf2 Qd2 41.Kg1 Qe3 42.Kg2 c4 43.Qd7 Qe7 44.Qg4 c3 45.Qd4 Qe5 46.Qh4 c2 47.Rc1 Qf4 48.Qf4 Bf4 49.Rc2 Bc2 50.Bg4 Bd3 51.Kf3 Bb5 0–1. avinoam – katarzyna75, kurnik, 2012.

7.c4 d6 8.e3 Nbd7 9.Nf3 g6 10.Be2 Bg7 11.0–0 0–0 12.d4 c5 13.d5 Nh5 14.Bg7 Ng7 15.Nbd2 f6 16.Bd3 Ne5 17.Ne5 fe5 18.Nf3 Bc8 19.Ng5 h6 20.Nf3 g5 21.Qc2 Bg4 22.Nd2 Bf5 23.Ne4 Bg6 24.f3 Qd7 25.Ng3 Bd3 26.Qd3 Nf5 27.Ne4 Ra8 28.g4 Nh4 29.Ng3 Rf8 30.e4 Qe8 31.Nf5 Nf5 32.ef5 Kh7 33.Kf2 Rf6 34.Rh1 h5 35.h4 gh4 36.Rh4 Rh6 37.g5 Qf7 38.g6 1–0. avinoam (1605) – chillke (1665), kurnik, 2012.

7.c4 e6 8.e3 Be7 9.Nf3 0–0 10.Be2 d5 11.cd5 Nd5 12.0–0 Nd7 13.e4 Nf4 14.d3 Nc5 15.Ne1 Ne2 16.Qe2 Qd7 17.f3 Qb5 18.Nc3 Qa5 19.d4?? Qa1 20.Nb5 Nb3 21.Nd3 Nd4 22.Nd4 Qd4 23.Kh1 Ba6 24.Rd1 Rd8 25.Qc2 Bd3 26.Qd2 Bc5 27.g3 Qe3 28.Qg2 Kf8 29.h3 Ke7 30.Kh2 Ra8 31.Rd2 Bb4 32.Rf2 Bc4 33.h4 Bc5 34.Rc2 Bd3 35.Rd2 Bb5 36.Kh3 e5 37.g4 f6 38.h5 Bc6 39.Kh4 Qg5 40.Kh3 Qf4 41.Kh4 Qg5 42.Kh3 Ra3 43.Qg3 Qd2 44.g5 Qg5 45.Qg5–+ fg5 46.Kg4 Bd4 47.Kg5 h6 48.Kg4 Kf6 49.f4 ef4 50.Kf4 Be4! 51.Ke4 Be5 52.Kd5 Rh3 53.Kc6 Rh5 54.Kd7 g5 55.Kc6 g4 56.Kd5 g3 57.Ke4 g2 58.Kd5 g1Q 59.Kc6 Qd1 60.Kb7 c5 (60...c5 61.Ka7 Qd7 62.Kb6 Rh2 63.Kc5 Rb2 64.Kc4 Qd4; 60...Qd5 61.Ka7 Rh1 62.Kb8 Ra1 63.Kc8 Ra8) 0–1. poganinbezdom (1635) – figgggo25 (1610), kurnik, 2011.

7.c4 g6 8.Nf3 Bg7 9.d4 0–0 10.e3 d6 11.Be2 Nbd7 12.Nbd2 c6 13.bc6 Bc6 14.d5 Ba8 15.0–0 Nc5 16.Nb3 Bb7 17.Bf6 Bf6 18.Nc5 bc5 19.Qb3 Bc8 20.Rb1 Bf5 21.Rb2 Be4 22.Bd3 Bf3 23.gf3 Bb2 24.Qb2 Qa5 25.h4 Qb4 26.Qc2 Ra8 27.h5 Ra1 28.Kg2 Qe1 29.Kg3 Qg1 30.Kf4 g5 31.Kf5 Qh2 32.Kg5 Rg1 33.Kf5 Qe5 0–1. iczker – janusz50, kurnik, 2012.

7.e3 d5 8.Nf3 Nbd7 9.d4 g6 10.c4 Bg7 11.Nc3 e6 12.Bd3 0–0 13.0–0 h6 14.Qc2 Nh7 (14...dc4 15.Bc4 Bf3 16.gf3=) 15.Na4 (15.cd5 ed5 16.Na2+/–) 15...f6?? (better is 15...dc4 16.Be2 Ng5=) 16.c5 bc5 17.Nc5 Nc5 18.dc5 c6 19.b6 e5 20.Nh4 e4+/– 21.Be2 f5? 22.Ng6+– Rf6?! 23.Bf6 Qf6 24.Nf4 Ng5 25.Ra1 Kh7?? 26.Ra7+– Bc8 27.f3 ef3 28.gf3 h5 29.Nh5 Qh6 30.f4 Ne4 31.Qb2 Nf6 32.Rg7 Kh8 33.Qf6 Qf6 34.Nf6 Kg7 35.Ne8 Kf8 36.Nd6 Bd7 37.b7 Ke7 38.b8Q (38.b8Q d4 39.Bh5 Bc8 40.Qc7 Bd7 41.Nf5 Kf8 42.Qd8 Be8 43.Qe8#) 1–0. captainevans – killik111, kurnik, 2012.

7.e3 e6 8.Nf3 Bd6 9.Be2 0–0 10.0–0 c6 (10...Be7 11.Bb2=) 11.c4 (11.Nc3 Qe7+=) 11...cb5= 12.cb5 Bc7 (12...Be7 13.Qb3=) 13.Qa4 d5 14.Bf6 Qf6 (14...gf6 15.Qa7 Qc8 16.Nc3+=) 15.Qa7+– Bh2?? (better 15...Qe7+–) 16.Nh2+– Qe7 17.Rc1 f5 (17...f6 18.Qb6 Rf7 19.Nc3+–) 18.Qb6 Rd8 (18...Rf7 19.Nf3 e5 20.Nc3+–) 19.Rc7 Rd7 20.Qb7 Rc7 21.Qb8 Kf7 22.Nc3 1–0. onur604 (2320) – Khtengiz (1925), lichess.org, 2020.

7.e3 e6 8.Nf3 Be7 9.Be2 0–0 10.0–0 d6 11.d4 Nbd7 12.c4 Re8 13.Nbd2 Nf8 14.Qc2 d5 15.cd5 Bd5 16.e4 Bb7 17.Ne5 Bb4 18.Nc6 (better is 18.f3!?+=) 18...Bc6+= 19.bc6 Bd2 20.Qd2 Ne4 21.Bd3?? (better is 21.Qf4 Nf6 22.Bd3+=) 21…Nd2–+ (21...Nd2 22.Rd1 Nb3–+) 0–1. typ48 – bebemicdetot, kurnik, 2012.

7.e3 e6 8.Nf3 g6 9.Be2 Bg7 10.0–0 0–0 11.c4 Nh5 12.Bg7 Ng7 13.d4 d5 14.c5 bc5 15.dc5 c6 16.b6 Nd7 17.Qc2 Qe7 18.Rc1 Ra8 19.Nbd2 Qf6 20.Nd4 Ne5 21.N2f3 Nf3 22.Bf3 Nf5 23.Nf5 Qf5 24.Qf5 ef5 25.h3 Ba6 26.g4 fg4 27.Bg4 Bc8 28.Bc8 Rc8 29.b7 Rb8 30.Rb1 Kf8 31.Rb6 Ke7 32.Rc6 Rb7 33.Rd6 Rd7 34.Rc6 d4 35.ed4 Rd4 36.Kg2 h5 37.f4 f6 38.Kg3 g5 39.fg5 fg5 40.Rg6 h4 41.Kf3 Rd5 42.c6 Kd8 43.Kg4 Kc7 44.Rg5 Kc6 45.Kh4 Rd4 46.Kh5 Kd6 47.h4 Ke7 48.Rg4 Rd5 49.Kh6 Kf7 50.h5 Rd6 51.Rg6 Rg6 52.hg6 Kg8 53.Kg5 Kg7 54.Kf5 Kf8 55.Kf6 Kg8 56.g7 Kh7 57.Kf7 1–0. avinoam – burza56, kurnik, 2012.

7.e3 g6 8.Nf3 Bg7 9.Be2 0–0 10.0–0 d6 11.Na3 e5 12.c4 Qe7 13.d4 ed4 14.Nd4 Nbd7 15.Nac2 Nc5 16.Nb4 h5 17.Ndc6 Bc6 18.Nc6 Qe4 19.Bd4 Ne6 20.Bf3 Qf5 21.Ne7 Kh7 22.Nf5 gf5 23.Bf6 Bf6 24.Bh5 Ng5 25.Bf3 Rg8 26.Kh1 Be5 27.Bd5 Rf8 28.Qh5 Kg7 29.Qg5 1–0. chybol3 – stef2244, kurnik, 2012.

7.e3 g6 8.Nf3 Bg7 9.Be2 0–0 10.0–0 d6 11.Bf6 Bf6 12.d4 Nd7 13.c4 e5 14.d5 e4 15.Nd4 Ne5 16.Nc3 Nd3 17.Ne4 Nc5 18.f4 Ne4 19.Bf3 Nc5 20.Ne2 Re8 21.Qd2 Qe7 22.Kf2 Ne4 23.Be4 Qe4 24.Ng3 Qc4 25.f5 Qd5 26.Qd5 Bd5 27.fg6 fg6 28.Kg1 Bh4 29.e4 Bg3 30.ed5 Be5 31.Rc1 Bd4 32.Kf1 Bc5 33.g3 Re5 34.Rd1 Re4 35.Kg2 Rb4 36.Re1 Rb5 37.Re7 Rb2 38.Kh3 b5 39.Rc7 b4 40.Rc8 Kg7 41.Rc7 Kh6 42.g4 b3 43.Kg3 Rd2 44.Rb7 b2 45.h4 Rd3 46.Kf4 Be3 47.Ke4 Rd4 48.Ke3 Rg4 49.Rb2 Rh4 50.Rb6 Rh3 51.Ke2 Rh2 52.Kf3 Rd2 53.Ke4 Kh5 54.Rd6 g5 55.Rd8 g4 56.d6 g3 57.d7 g2 58.Rg8 Rd7 59.Rg2 Rf7 60.Ke5 h6 61.Ke6 Rf4 62.Ke5 Rf1 63.Ke4 1–0. avinoam (1645) – burza56, kurnik, 2012.

4.c4 ab5

5.cb5 c6 6.a4 cb5 7.ab5 Ra1 8.Ba1 f6 9.e3 e6 10.Nf3 Bc5 11.Bc4 d5 12.Bb3 Ne7 13.0–0 0–0 14.Nc3 Qd7 15.Qe2 Nc8 16.d4 Bb4 17.Rc1 Nd6 18.Ba4 Bc3 19.Rc3 Ne4 20.Rc2 Nd6 21.h3 Rc8 22.Rc8 Qc8 23.Bb2 h6 24.Ba3 Ne4 25.Nh2 Nd7 26.Ng4 e5 27.f3 Ng3 28.Qf2 Nf5 29.de5 Ne5 30.Ne5 fe5 31.Bb2 e4 32.fe4 de4 33.Bb3 Kh8 34.Qf4 Qc5 35.Qb8 Kh7 36.Qb7 Qe3 37.Kh2 Qg3 38.Kg1 Qb3 39.Be5 Qd1 40.Kh2 e3 41.Qe4 Kg6 42.g4 Qe2 43.Kg1 Qf2 44.Kh1 Kg5 45.gf5 e2 46.Qg4 1–0. chybol3 – plamka1oo, kurnik, 2012.

5.cb5 c6 6.a4 c5 7.e3 d5 8.Nf3 d4 9.ed4 cd4 10.Bd4 Nh6 11.Bc3 Nd7 12.Bc4 Nf5 13.0–0 f6 14.Nd4 Nc5 15.Nf5 e6 16.Re1 e5 17.Nh4 Bd6 18.Qh5 Kd7 19.Qf7 Kc8 20.Nf5 Kb8 21.Nd6 Qd6 22.Qg7 Qd8 23.d4 Rg8 24.Qg8 Qg8 25.Bg8 Nd3 26.Re3 e4 27.d5 Kc7 28.Bf6 Rg8 29.Be5 Kc8 30.g3 Bd5 31.Nc3 Ne5 32.Nd5 1–0. chybol3 – drita2012, kurnik, 2012.

5.cb5 c6 6.e3 cb5 7.Nc3 b4 8.Nce2 e6 9.d4 d5 10.Qb3 Nc6 11.Nf3 Na5 12.Qd3 Ba6 13.Qd1 Nc4 14.Bc1 b5 15.a4? (better is 15.Nf4–/+) 15...Qa5 16.Nf4 ba4 (better is 16...b3 17.Bd2 Nd2 18.Nd2 Bb4–+) 17.Ra4–/+ Qb5 18.Ne5? (18.Nd3 b3 19.Nb2 Nf6–/+) 18...Rc8?? (18...b3 19.Rc4 dc4 20.Bd2–+) 19.Be2? (better is 19.Qb3–/+) 19...b3–+ 20.Rc4 dc4 21.0–0 f6 22.Ng4? Qd7 23.d5 e5 24.Ne6 Nh6?? 25.Nh6+= gh6?? 26.Bg4 Rg8–/+ 27.Bf5 Rg5 28.e4 Rf5 29.ef5 Bc5 30.Qh5 Ke7?? 31.Qh6 Kd6?? 32.Qf6+– Re8 33.Nc5 Kc5 34.Qa6 Rg8 35.Qa5 Kd4 36.Rd1 Ke4 37.Qe1 Kf5 38.f3 Kf6 39.Qh4 (39.Qh4 Kf7 40.Qc4+–) 1–0. captainevans – robertplayok, kurnik, 2012.

5.cb5 Bd5 6.a4 e6 7.e3 Bc5 8.f4 Nf6 9.Nf3 0–0 10.Be2 Bf3 11.Bf3 c6 12.0–0 d5 13.Nc3 Qd6 14.d4 Bb4 15.Ne2 Re8 16.g4 Ne4 17.Be4 de4 18.f5 ef5 19.Rf5 Qg6 20.h3 c5 21.Nf4 Qh6 22.dc5 Bc5 23.Qe2 Nd7 24.Rf1 g6 25.Rf7 Kf7 26.Qc4 Ke7 27.Nd5 Kd8 28.Nf6 Qe3 29.Kg2 Nf6 30.Bf6 Be7 31.Rd1 1–0. jura1946 – dijetari, kurnik, 2012.

5.cb5 d6 6.e3 Qd7 7.Nf3 f6 8.Be2 e5 9.0–0 Ne7 10.Nc3 g6 11.d4 Bg7 12.de5 fe5 13.Qc2 0–0 14.Ne4 Nd5 15.Rad1 Qe6? (better is 15...Kh8+=) 16.Nfg5+– Qf5 17.g4 (better is 17.Bc4!? Kh8 18.Rd5+–) 17...Qc8 18.Qb3 h6 19.Nh3 Kh7 (19...Qe6 20.f3 Nf4 21.ef4 Qb3 22.ab3 d5+–) 20.Bc4?? (better is 20.Rd5 Bd5 21.Qd5+–) 20...Nf6?? (20...Qg4 21.Ng3 Ne7 22.Be6–+) 21.Nf6? Rf6–+ 22.Bd5 Qg4 23.Kh1 Bd5 24.Qd5 Qh3?? 25.Qa8+= Qf3 26.Qf3 Rf3 27.Kg2 Rf7 28.f3 Nd7 29.a4 Nc5 30.Ra1 e4 31.Bg7 Kg7 32.f4 Nd3 33.Rfd1 Nb4 34.Rd2 Nd3 35.a5 ba5 36.Ra5 Ne1 37.Kg3 Nf3 38.Rc2+– Ne1 39.Rc6 Nd3 40.Ra7 Nb4 41.Rcc7 Rc7 42.Rc7 Kf6 43.Rc4 Nd5 44.Re4 Kf5 45.Re8 Nf6 46.Rf8 Ke6 47.Rf6! Kf6 48.b6 (48.b6 d5 49.b7+–) 1–0. slihuatamanio (1615) – aptekarz3min, kurnik, 2012.

5.cb5 d6 6.e3 e5 7.Nf3 Nf6 8.Be2 Be7 9.0–0 0–0 10.Nc3 c6 11.a4 cb5 12.ab5 Ra1 13.Qa1 Nbd7 14.d4 ed4 15.ed4 Ne4 16.Ne4 Be4 17.Rc1 Bf6 18.h3 Re8 19.Kf1 h6 20.Qa7 Bd5 21.Rc7 Nf8 22.Qb6 Re7 23.Rb7 Qe8 24.Rb8 Qd7 25.Rd8 Qe6 26.Ng1 g6 27.Bc3 Bg7 28.Bg4 f5 29.Bd1 Kh7 30.Rd6 Qe4 31.Bf3 Qd3 32.Be2 Bg2 33.Kg2 Qc3 34.Qc5 Qc5 35.dc5 Nd7 36.c6 Nb6 37.Bf3 Kg8 38.Bd5 Kf8 39.Rd8 Re8 40.Re8 Ke8 41.Nf3 Nd5 42.Nd2 Kd8 43.Nc4 Kc7 44.Kf3 g5 45.Ke2 Bd4 46.f3 Bc5 47.Kd3 Nf4 0–1. popovicigelu – adamanis (1605), kurnik, 2012.

5.cb5 d6 6.e3 e5 7.Nf3 g6 8.Be2 Bg7 9.0–0 Ne7 10.a4 0–0 11.Na3 Qe8 12.Nc2 c6 13.h3 cb5 14.Bb5 Bc6 15.Nb4 Bb5 16.ab5 Ra1 17.Ba1 Qb5 18.Bc3 Nbc6 19.Nc6 Nc6 20.Ng5 d5 21.Qc2 d4 22.Rb1 Qa6 23.Ra1 Qb7 24.Bb2 Rc8 25.Qb3 h6 26.Nf3 Na5?? 27.Ra5!+– Rb8 28.Rb5 Qc6 29.ed4 ed4 30.Nd4 Qd6 31.Nf3 Bb2 32.Qb2 Kh7 33.d4 f6 34.Nh4 Rb7 35.Qc2 f5 36.Qb2 Qe6 37.Nf3 g5 38.Qb1 Kg6 39.Ne5 Kf6 40.Kh2 Qd6 41.g3 Qd4 42.Nf3 Qd8 0–1. chybol3 – miziii, kurnik, 2011.

5.cb5 e6 6.a4 Qg5 7.Nf3 Bf3 8.ef3 Nh6 9.Be2 Nf5 10.Qc2 Bd6 11.Nc3 Qg2 12.0–0–0 0–0 13.Ne4 Qh3 14.Rdg1 g6 15.Nf6 Kg7 16.Nd7 Kg8 17.Nf8 Kf8 18.Qc3 e5 19.Ba3 Ba3 20.Qa3 Kg8 21.Bd3 Nd4 22.Qe7 Ra4 23.Qe8 Kg7 24.Qe5 f6 25.Qc7 Nd7 26.Rg4 Ra1 27.Bb1 Nb3 28.Kb2 Rb1 29.Kb1 Nd2 30.Kc2 Nf3 31.Qd7 Kh6 32.Rd1 Ne5 33.Rg6 Ng6 34.Qh3 Kg7 35.Rd7 Kg8 36.Qh7 Kf8 37.Qg7 Ke8 38.Qf7 1–0. jura1946 – zawisza01, kurnik, 2012.

5.cb5 e6 6.a4 Qg5 7.Nf3 Qg4 8.Qc2 Bc5 9.d4 Bb4 10.Nbd2 Bd2 11.Qd2 Ne7 12.h3 Qg6 13.Ne5 Qh5 14.Qc2 d6 15.Qc7 Bc8 16.g4 Qg5 17.Nc6 Nbc6 18.bc6 0–0 19.Qb6 Nd5 20.Qb3 Ba6 21.Bg2 Rab8 22.Qc2 Nf4 23.Bf3 Qa5 24.Bc3 Qc7 25.0–0 Nh3 26.Kh2 Nf4 27.Rfb1 d5 28.Kg1 Nh3 29.Kg2 Nf4 30.Kg1 Rb1 31.Rb1 Bc4 32.Bd2 Ne2 33.Be2 Be2 34.Rb7 Qd6 35.Bb4 Bd3 36.Bd6 Bc2 37.Bf8 Kf8 38.c7 Ke7 39.c8Q Kf6 40.Qc2 h6 41.Qe2 g6 42.Qf3 Kg5 43.Qg3 f6 44.f4 1–0. jura1946 – beki73, kurnik, 2012.

5.cb5 e6 6.e3 f6 7.Nf3 Ne7 8.Be2 Nd5 9.a4 Nb4 10.Qb3 Bd5 11.Qc3 Qe7 12.0–0 Qc5 13.Qc5 Bc5 14.d4 Bd6 15.Nfd2 Nc2 16.Nc3 Na1 17.Ra1 0–0 18.Nd5 ed5 19.Bf3 c6 20.Nb3 cb5 21.ab5 Ra1 22.Ba1 Bb4 23.Bd5 Kh8 24.f3 d6 25.Nc1 Nd7 26.Nd3 Ba5 27.Bc6 Nb8 28.Bd5 Rc8 29.h3 Bc3 30.Bc3 Rc3 31.Nf4 Rc1 32.Kh2 Rb1 33.Bc6 g5 34.Nd5 Re1 35.e4 Rd1 36.Nb6 Rd4 37.Nd5 Nc6 38.bc6 Rc4 39.c7 Kg7 40.Kg3 Kf7 41.Kg4 Ke6 42.h4 gh4 43.Kh4 f5 44.Nf4 Ke5 0–1. chybol3 – adamjakub, kurnik, 2012.

5.cb5 Nf6 6.a4 g6 7.e3 Bg7 8.Nf3 0–0 9.g3 e6 10.Bg2 d6 11.0–0 Qe7 12.Qb3 d5 13.Ba3 c5 14.bc6 Qc7 15.cb7 Qb7 16.Bf8 Kf8 17.Nc3 Nc6 18.Rfb1 Na5 19.Qb4 Kg8 20.Nd4 Nc4 21.d3 Bf8 22.Qb5 Ra5 23.Qc6 Qc6 24.Nc6 Rc5 25.Ne5 Ne5 26.d4 Rc3 27.de5 Nd7 28.Bf1 Bg7 29.Bb5 Ne5 30.Ra2 Nf3 31.Kg2 Ng5 32.h4 Ne4 33.Bf1 Rc6 34.Bd3 Nc3 35.Rc2 Rd6 36.Rb3 Na4 37.Ra2 Nc5 38.Ra8 Bf8 39.Rba3 Nd3 0–1. chybol3 – stef2244, kurnik, 2012.

5.cb5 Nf6 6.e3 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 c6 10.a4 cb5 11.ab5 Ra1 12.Ba1 d5 13.d4 Nbd7 14.Nbd2 Ne4 15.Ne4 de4 16.Nd2 f5 17.Qb3 Kh8 18.Qe6 Nf6 19.Nc4 Bd5 20.Qb6 Bc4 21.Qd8 Rd8 22.Bc4 Rc8 23.Be6 Rb8 24.Rb1 Ne8 25.Bd7 Nc7 26.Bc3 Bf6 27.Ba5 Na8 28.Bc6 Nb6 29.Bb6 Rb6 30.Ra1 Kg7 31.Ra6 Rb8 32.b6 Kf7 33.b7 e6 34.Ra8 Rb7 35.Bb7 e5 36.d5 1–0. popovicigelu – ibri67 (1630), kurnik, 2012.

3.b5 c5

4.a4 a5 (--> 1.b4 a5 2.b5 b6 3.a4 Bb7 4.Bb2 c5).

4.a4 d5 5.e3 Nd7 6.Nf3 f6 7.c4 e5 8.Be2 (8.cd5 Bd5 9.Nc3 Be6+=) 8...e4 9.Ng1 (9.Nh4 Ne5=) 9...Bd6 10.cd5 Bd5 11.Nc3 Bb7 12.f3 (better 12.f4=) 12...Qe7 (12...f5 13.d3 Qg5 14.Kf2 Qh4 15.Kf1=+) 13.fe4 (better 13.Ne4 Be4 14.fe4+–) 13...Be4? (better 13...f5 14.d3 fe4 15.Ne4 Be5 16.Be5 Ne5=) 14.Ne4+– Qe4 15.Bf3 Qb4 (15...Qh4 16.g3 Bg3 17.hg3 Qg3 18.Ke2+–) 16.Bc3 (16.Bc3 Qh4 17.g3 Bg3 18.hg3 Qg3 19.Ke2+–; 16.Ba8 Qb2 17.Nf3 Ne7+–) 1–0. BeepBeepImAJeep (2740) – erindreki (2425), lichess.org, 2015.

4.c4 d5 5.cd5 Bd5 6.Nc3 Bb7 7.e3 Nf6 8.Nf3 e6 9.Bc4 Be7 10.0–0 0–0 11.Ng5 (11.Qe2 Nbd7=) 11...Nbd7 12.Be6 fe6 13.Ne6 Qb8 14.Nf8 Qf8 15.d3 Rd8 (15...Qf7 16.e4=) 16.Qa4 Ra8 17.f4 Kh8 18.Qb3 Qe8 19.e4 Qh5 20.Rf3 Ne8?? (better 20...Re8+=) 21.Qe6+– (21.Qe6 Bf6 22.Qd7+–) 1–0. onur604 (2285) – Nightkraken (2040), lichess.org, 2020.

4.c4 Nf6 5.e3 d6 6.Nf3 e5 7.Be2 Nbd7 (7...e4 8.Ng5=) 8.0–0 Be7 9.d3 (9.d4 Qc7=) 9...0–0 10.Nbd2 a6 11.a4 ab5 12.ab5 Opening the a–file gets White a lot of play 12...Ra1 13.Qa1 Qa8 (13...Re8 14.Qc1=) 14.Qd1 g5 (14...Qd8!?=) 15.Qc2+– g4 (15...h6 16.Ra1 Qb8 17.Ne4+–) 16.Ra1 Qc8 17.Nh4 h5 (17...Re8 18.Nf5+–) 18.Nf5 Qd8 (18...Re8 19.e4+–) 19.Ra7+– Bc8 20.d4 cd4 21.ed4 ed4 22.Bd4 Re8 23.Nh6 Kg7 24.Nf5 (24.Be3 Nc5 25.Nf5 Kg8 26.Ne7 Re7 27.Re7 Qe7 28.Qa2+–) 24...Kf8?? (24...Kg8 25.Ne4 Bf8 26.Ned6 Re6 27.Bf6 Rf6+–) 25.f3 Nc5?? (25...d5+–) 26.Ne7 (worse 26.Re7 Bf5 27.Re8 Qe8 28.Qf5 Qe2 29.Bf6 Qe1 30.Nf1 Qe6+–) 26...Re7 (26...Qe7 27.Re7 Ke7+–) 27.Bf6 gf3 (27...Nb7+–) 28.Qh7 f2 29.Kf1 (29.Kf1 Ra7 30.Qh8) 1–0. onur604 (2320) – sausagedog (2000), lichess.org, 2020.

4.e3 a6 5.a4 (5.Nf3 e6=) 5...ab5 (5...Nf6 6.Nf3=) 6.ab5 Ra1 7.Ba1 d6 (7...Nf6 8.Nf3=) 8.d4 cd4 (8...Nf6 9.Nf3=) 9.ed4 Nd7 10.Nf3 Ngf6 11.Nbd2 (11.Be2 e6=) 11...g6 (11...e6 12.Bd3=) 12.Bc4 Bg7 13.0–0 0–0 14.Re1 (14.Qe2 e6=) 14...d5 (14...e6 15.Bb2=) 15.Bb3 (15.Bd3 e6=) 15...e6 16.c4 (16.Qe2 Qc7=) 16...dc4=+ 17.Nc4 Qa8 (17...Qe7 18.Bc3=+) 18.Nce5= Ne5 (18...Rd8 19.Qe2 Ne5 20.de5 Bf3 21.Qf3 Qf3 22.gf3=) 19.de5 Bf3 (19...Nh5 20.Re3=) 20.Qf3 Qf3 21.gf3 Nh5 (21...Nd5 22.Bd5 ed5 23.Bd4=) 22.Re4 1–0. DEFFM – GuestSQLL, freechess.org, 2018.

4.e3 d6 5.Nf3 Nd7 6.Be2 Ngf6 7.d4 g6 8.0–0 Bg7 9.Nbd2 (9.c4 cd4 10.ed4 0–0=) 9...0–0 10.c4 a6 11.a4 ab5 12.ab5 Ra1 13.Qa1 Qa8 (13...cd4 14.ed4 d5 15.Rc1 dc4 16.Nc4=) 14.Qb1 (14.d5 e6 15.e4 Re8=) 14...Qa7 (14...cd4 15.ed4 d5 16.Qc2 dc4 17.Ra1=) 15.Qc2 Ra8 16.Ra1 Qb8 17.d5 Ra1 18.Ba1 Qa8 (18...e6 19.de6 fe6 20.Qd3=) 19.Bc3+= Bc8 20.e4 Ng4 (20...Bb7 21.Bd3+=) 21.Bg7+– Kg7 22.Qb2 Kg8 23.Ne1 (23.Nd4 Ngf6 24.Nc6 e6+–) 23...Nde5?? (better 23...Ngf6+=) 24.f4+– 1–0. GuestGMLC – GuestKHJZ, freechess.org, 2018.

4.e3 Nf6 5.Nf3 d6 6.c4 Nbd7 (6...e5 7.Be2=) 7.Be2 Ne5 (7...e6 8.0–0=) 8.0–0 (8.d3 Qc7+=) 8...Nf3 (8...Qc7 9.d3+=) 9.Bf3+– Bf3 (9...Qd7 10.a4+–) 10.Qf3 (worse 10.gf3 d5=+) 10...e6 (10...Nd7 11.Na3+–) 11.Qc6 (11.Bf6 gf6 12.Qc6 Ke7 13.Qb7 Ke8+–) 11...Nd7+= 12.f4 (12.Qe4+=) 12...Be7 (better 12...d5!?+=) 13.Bg7+– Rg8 14.Bb2 Bf6?? (better 14...Qc8 15.Qc8 Rc8+–) 15.Bf6+– Qf6 (15...Qc8 16.Bg5 Qc6 17.bc6 Nb8+–) 16.Qa8 Ke7 (16...Qd8 17.Qa7 Rg6 18.a4+–) 17.Qg8 Qa1 18.f5 (18.Nc3 Qb2 19.f5 Nf6+–) 18...Nf6 19.Qb8 Qa2 (19...Qe5+–) 20.Qc7 Nd7 21.f6 Kf8 (21...Ke8 22.Qc8) 22.Qc8 (22.Qd8) 1–0. GuestKWSC – GuestGYYP, freechess.org, 2020.

3.b5 c6

4.a4 a6 5.c4 d5 6.e3 dc4 7.ba6 Ba6 8.Nf3 Nd7 9.Na3 b5 10.ab5 cb5 11.Nc2 (11.d3 e5 12.dc4 bc4 13.Nc4 Bb4 14.Nfd2 Bc4 15.Bc4 Ra1 16.Qa1 Ngf6=) 11...e6 (11...Nc5 12.Nfd4–/+) 12.Be2 (better 12.d3=+) 12...Bc5?? (better 12...Nc5–/+) 13.Bg7+– b4 14.Bh8 b3 (14...Ne7 15.d4 Bd6 16.Be5 Be5 17.de5+–) 15.Ncd4 f6 (15...Qc8+–) 16.Ne6 (16.Ne6 Qb6 17.Bc4+–) 1–0. BeepBeepImAJeep (2470) – pidargi (2285), lichess.org, 2018.

4.a4 Qc7 5.e3 e6 6.Nf3 Bb4?? (better 6...Nf6+=) 7.Bg7+– cb5 (7...d5 8.Bh8 a6 9.Be5+–) 8.ab5 Qc5 (8...Nf6 9.Bh8 Be7 10.Nc3+–) 9.c3 Ba5 10.Bh8 Nh6 (10...d5 11.Nd4 Nd7 12.Nb3+–) 11.Be2 (11.Na3 a6+–) 11...Ng4 (11...Qf8 12.Be5+–) 12.h3 Nh6 13.0–0 (13.Na3 Nf5+–) 13...Nf5 14.Nd4 Nd4 15.Bd4 Qg5 (15...Qe7 16.c4+–) 16.Bf3 Nc6 (16...d5 17.Na3 Qe7 18.Re1+–) 17.bc6 dc6 18.Qc2 0–0–0 19.Qh7 e5 20.Bg4 Kb8 21.f4 ef4 22.Rf4 Qb5 23.Rf7 (23.Rf7 Qa6 24.Be2 Bc3 25.Ba6 Bd4 26.Rb7 Ka8 27.Ra7 Kb8 28.Qc7) 1–0. DEFFM – GuestSTDH, freechess.org, 2019.

4.a4 Qc7 5.Nf3 d6 (5...Nf6 6.e3+=) 6.e3 (6.g3 Nf6+=) 6...Nd7 (6...Nf6 7.Bd3+=) 7.d4 (7.a5 cb5 8.Bb5 a6 9.ab6 Qb6 10.Bd7 Kd7+=) 7...Ngf6 8.Bc4 (8.bc6 Bc6 9.Bd3 e6+=) 8...g6 (8...cb5 9.Bb5 Rc8 10.c3=) 9.0–0 d5 10.bc6 dc4 (better 10...Bc6!? 11.Bd3 Bg7+=) 11.cb7+– Qb7 12.Nc3 Bg7 13.Qe2 Rc8 14.Nd2 (14.e4 0–0+–) 14...Nd5 15.Nd5 (15.Nc4? Nc3 16.Bc3 Qd5 17.Nb6 Nb6–+ (worse 17...ab6 18.Bb4–/+)) 15...Qd5 16.e4 (better 16.Bc3+–) 16...Qc6?? (better 16...Qa5 17.c3 0–0+–) 17.d5+– Qc5 (17...Qc7 18.Bg7 Rg8 19.Bc3+–) 18.Bg7 Rg8 19.Bc3 White prepares a5 19...h5 (19...a6 20.Rfb1+–) 20.Rfb1 Qc7 (20...a5 21.Rb5 Qc7 22.e5+–) 21.e5 Nc5 (21...Kf8 22.a5+–) 22.a5 ba5 (22...Kf8 23.Qe3 Rd8 24.d6 ed6 25.ab6 ab6 26.ed6 Qd6 27.Qh6 Ke8 28.Re1 Kd7 29.Nc4+–) 23.Ra5 1–0. GuestVNCM – GuestVGBV, freechess.org, 2020.

4.a4 d5 5.e3 Nd7 (5...Nf6 6.Nf3=) 6.Nf3 h6 (6...cb5 7.ab5 Ngf6 8.c4+=) 7.Nd4 (7.bc6 Bc6 8.Nd4 Qc8+–) 7...cb5 (7...Nb8 8.a5! a6 9.bc6 Nc6 10.Nc6 Bc6 11.ab6 Qb6 12.Bd4+–) 8.Ne6 Qc8 9.Ng7 Bg7 10.Bg7 Rh7 11.Bb2 Ngf6 (11...b4 12.Bd3 Ngf6 13.Bh7 Nh7 14.d3+–) 12.Bb5 (12.ab5 Rg7+–) 12...Bc6 13.0–0 Bb5 (13...Rg7!?+–) 14.ab5+– Ne4 (14...Rg7 15.f3+–) 15.d3 f6?? (better 15...Nd6+–) 16.de4 de4 17.Nc3 Rg7 (17...Nc5 18.Qd5 Kf8 19.Ne4+–) 18.Qh5 Kf8 19.Ne4 Qe8 (19...Qc2 20.Qd5 Rb8 21.Ra7 Qb2 22.Qd7+–) 20.Qh6 Qg6 21.Qg6 Rg6 22.Rfd1 Ne5 (22...Ke8 23.Rd5+–) 23.Be5 fe5 24.Rd7 Kf7 (24...Rc8 25.c3+–) 25.Raa7 Re8 (25...Ra7 26.Ra7 Rg8+–) 26.Nd6 (26.Nd6 Rd6 27.Rd6+–) 1–0. GuestZRQV – GuestZXNC, freechess.org, 2020.

4.a4 e6 5.e3 Nf6 6.Nc3=.

4.a4 e6 5.e3 Nf6 6.Nf3 d5 7.Bd3=.

4.a4 e6 5.e3 Nf6 6.Nf3 Ne4? 7.Be2 (7.Nc3 d5+–) 7...Be7 (7...d5 8.0–0+=) 8.d3 (8.Nc3 d5+=) 8...Nf6 9.0–0 0–0 10.c4 d5 11.Nbd2 a6 12.Qc2 dc4 13.dc4 Nd5?? (better 13...Nbd7+=) 14.cd5+– ed5 (14...cd5 15.Bd3+–) 15.Qf5 (15.Ne5 c5+–) 15...c5 16.Bd3 (16.e4 ab5 17.ab5 Nd7+–) 16...g6 17.Qe5 (17.Qf4 f6+–) 17...f6 18.Qe6 Kg7 19.Qg4 (19.e4 c4 20.Be2 Bb4+–) 19...c4 (19...Qc8 20.Qh4+–) 20.Bf5 Kf7 (20...Bc8 21.Nd4 Bb4+–) 21.Be6 Ke8 (21...Kg7 22.Nh4 Bb4 23.Ndf3+–) 22.Qh3 Rh8 (22...Qc7 23.Nb1 Bb4 24.Nc3 Bc3 25.Bc3+–) 23.Ng5! h6 (23...fg5 24.Bh8 Pinning (24.Bh8 Deflection)) 24.Bf7 (better 24.Nf7 Qc7 25.Nh8 Nd7 26.Ng6 c3+–) 24...Kf8 25.Ne6 (better 25.Bg6 Kg7 26.Ne6 Kg6 27.Nd8 Bd8+–) 25...Kf7 26.Nd8 Rd8 27.Qh6 Nd7 (27...Rg8 28.Nf3 Nd7 29.Qh7 Rg7 30.Ng5 fg5 31.Qg7 Ke8 32.Qg6 Kd8 33.Bd4+–) 28.Qh7 Ke6 29.Nf3 g5 (29...Bc5+–) 30.Nd4 Kd6 31.Nf5 (31.Qf7 Bf8 32.Ba3 Kc7 33.Ne6 Kb8 34.Nd8 Ka7 35.Nc6 Bc6 36.bc6 Rd8 37.Bf8 d4 38.Qe7 b5 39.Qd8 Nf8 40.ab5 de3 41.Ra6) 31...Ke6 32.Ne7 Rh8 33.Qg7 Rae8 34.ba6 Ba6 35.Nd5 Bb7 36.Nc7 Kd6 (36...Kf5 37.f3 Rh4 38.Qd7 Kg6 39.Qe8 Kh7 40.Bf6 Kh6 41.Qh8 Kg6 42.Qg7 Kh5 43.Qg5) 37.Rfd1 Kc7 (37...Bd5 38.Ne8 Re8 39.Rd5 Kc7 40.Qd7 Kb8 41.Qe8 Kb7 42.Rd7 Ka6 43.Qa8) 38.Rd7 Kb8 (38...Kc8 39.Rc7 Kb8 40.Rb7 Ka8 41.Ra7 Kb8 42.Qc7) 39.Rb7 Ka8 40.Ra7 Kb8 41.Qb7 (41.Qc7) 1–0. DEFFM (2035) – Barracuda1234 (1855), lichess.org, 2020.

4.a4 e6 5.e3 Nf6 6.Nf3 g6 7.Be2 (7.a5 ba5 8.Nc3 Bg7=) 7...Bg7= 8.0–0 0–0 9.d4 cb5 (9...a6 10.c4=) 10.ab5+= d5 (10...d6 11.c4+=) 11.Nbd2 Nbd7 (11...a6 12.ba6 Ba6 13.c4+=) 12.c4 dc4 13.Nc4 Qc7 (13...Ne4 14.Qd3+–) 14.Ba3 (better 14.Rc1 Rfc8 15.Na5+–) 14...Rfc8? (better 14...Bf3 15.gf3 Rfd8+=) 15.Nd6+– Rd8 16.Rc1 (16.Ng5 Nf8 17.Ndf7 Re8+–) 16...Qb8 (16...Nc5 17.Bc5 bc5 18.Nb7 (18.dc5?! Ne4+=) 18...Qb7 19.Rc5+–) 17.Ng5 (17.Nb7?! Qb7 18.Qa4 Nd5+–) 17...Rf8 (17...Bd5 18.Ngf7 Rf8 19.Ne5 Ne5 20.de5+–) 18.Nb7 Qb7 19.Bf3 (19.Bf8 Bf8 20.Qc2 Nd5+–) 19...Nd5 20.Bf8 Bf8 21.e4 Nb4 22.d5 (better 22.Qb3 Nf6 23.Rc4+–) 22...Rd8?? (better 22...ed5 23.ed5 Ne5+–) 23.de6 fe6 24.Ne6 Re8 (24...Rc8 25.Qb3 Nc5 26.Nc5 Qf7 27.Ne6+–) 25.e5! Qb8 (25...Ne5 26.Bb7 Discovered attack) 26.Qd7 Re7 27.Rc8 Kf7 28.Ng5 Kg7 29.Qh3 Qe5 30.Qh7 Kf6 31.Rf8 Kg5 (31...Rf7 32.Rf7 Kg5 33.h4) 32.h4 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.a4 e6 5.e3 Qg5 6.Nf3+– Qg6 (6...Qh5 7.Be2+–) 7.Be2 (7.Nc3 Nf6+–) 7...Nf6 (7...Qg2? 8.Rg1 Qh3 9.Rg7+–) 8.0–0 h6 (8...c5!? 9.a5+–) 9.Ne5+– Qg5 (9...Qf5 10.Bd3 Qh5 11.Qh5 Nh5 12.Ng6+–) 10.f4 Qh4 (10...Qf5 11.g4 Qh7 12.Bd3+–) 11.Nf3 (better 11.Nc3 Bb4 12.Rf3 Bc3 13.Bc3+–) 11...Qh5?? (better 11...Qg4+–) 12.Bf6 gf6 13.Ng5 Qg6 14.Bh5 Qf5 (14...Qg7 15.Nf7 Rg8 16.Nh6 Kd8 17.Ng8 Qg8+–) 15.Nf7 cb5 (15...Qc5 16.Nc3 d5+–) 16.Nh6 (16.Nh6 Kd8 17.Nf5+–) 1–0. DEFFM – GuestRCWW, freechess.org, 2019.

4.c4 cb5 5.cb5 Nf6 6.e3 g6 (6...e6 7.Nf3=) 7.Nf3 (7.Bf6 ef6 8.Nf3 a6+=) 7...Bg7= 8.Be2 0–0 9.0–0 d6 10.a4 Nbd7 11.Nc3 e5 12.d4 ed4 (12...Rc8 13.Rc1+=) 13.Nd4 Ne4 (13...Rc8 14.Qd2+=) 14.Ne4 Be4 15.Bf3 Bf3 16.Qf3 (16.gf3?! Qh4=) 16...Ne5 17.Qd5 Rc8 18.f4 (18.Ba3 Nc4+=) 18...Rc5 (18...Nc4!? 19.Nc6 Ne3=+) 19.Qb3 Nc4 20.f5 (20.Nc6 Qe8 21.Bg7 Kg7=) 20...Nb2 (better 20...Nd2!? 21.Qd3 Nf1 22.Rf1 Qg5–/+) 21.Qb2= gf5 (21...Qg5 22.Rae1=) 22.Qd2 (22.Qf2 Qg5+=) 22...Qc7 (better 22...Re8=) 23.Nf5?? The isolani on d6 becomes a target (better 23.Rad1!?+=) 23...Bc3 (better 23...Ba1 24.Nh6 Kg7 25.Nf5 Kh8 26.Qd6 Bg7–+) 24.Qd6 (24.Qa2!? Ba1 25.Qa1=+) 24...Qd6–/+ 25.Nd6 Ba1 26.Ra1 Rd8?? (better 26...Rd5 27.Ne4 f5–/+) 27.Nb7+– Rcd5 (27...Rdc8 28.Nc5 bc5 29.Kf2+–) 28.Nd8+– Rd8 29.Kf2 Kg7 30.h4 Kg6 (30...Kf6 31.Rc1 Rd7 32.g4+–) 31.g4 (31.Rc1 Rd2 32.Kf3 Ra2+–) 31...Rd2 32.Kf3 h6 33.h5 Kg5 34.a5 (34.Rc1 Rh2 35.Rc7 Rh1+–) 34...f5 (34...Rb2 35.ab6 ab6 36.Ra7=) 35.ab6 (35.gf5 Kf5 36.ab6 ab6+–) 35...ab6 (better 35...fg4 36.Ke4 ab6=) 36.gf5+– Kf5 37.Rb1 (37.Rc1 Rb2 38.Rc6 Rb5 39.Rh6 Kg5+–) 37...Rh2 (37...Kg5 38.Rb4+=) 38.Rb4 (better 38.Rc1!?+–) 38...Rh5= 39.Rf4 (39.Rc4 Rh3 40.Ke2 Rh2 41.Kd3 Rb2=) 39...Ke6 (better 39...Kg6 40.Rg4 Rg5=) 40.Kg4 (better 40.Rc4 Rb5 41.Rc6 Kf5 42.Rh6=) 40...Rg5 41.Kh4 Rb5 42.e4 (42.Rf8 Ke5–+) 42...Re5 43.Rg4? (better 43.Kg3–+) 43...Rg5! 44.Rf4 (44.Rg5 hg5 Passed pawn) 44...Ke5 45.Rf7 Rg6 46.Rb7 Ke4 47.Re7 (47.Rd7 Ke5–+) 47...Kd5 48.Kh5 Re6 49.Rh7 (49.Rb7 Kc5–+) 49...b5 50.Rb7 Kc4 51.Rh7 (51.Rc7 Kb3–+) 51...b4 52.Rh6 (52.Rc7 Kb5 53.Kg4–+) 52...Rh6 53.Kh6 b3 54.Kg5 b2 55.Kf4 (55.Kg6 b1Q 56.Kf6 Qb6 57.Ke5 Qe3 58.Kf5 Kd5 59.Kg6 Ke6 60.Kg7 Qc3 61.Kg8 Qg3 62.Kf8 Qg4 63.Ke8 Qg8) 55...b1Q (55...Kd4 56.Kg5 Ke5 57.Kg4 b1Q 58.Kg3 Qd3 59.Kg2 Kf4 60.Kf2 Qd2 61.Kf1 Kf3 62.Kg1 Qg2) 56.Ke3 (56.Kf3 Qf5 57.Kg2 Kd4 58.Kg3 Ke3 59.Kg2 Qg5 60.Kh3 Kf3 61.Kh2 Qg2) 56…Qd3 (56...Qd3 57.Kf4 Kd5 58.Kg4 Ke5 59.Kg5 Qg3 60.Kh5 Kf5 61.Kh6 Qg6) 0–1. alt20 – enneisirap, lichess.org, 2016.

4.a4 cb5

5.ab5 Qc7 6.e3 e6 7.Nf3 Nf6 8.Be2 Bd6 9.Bf6 (9.0–0!?+–) 9...gf6+= 10.h3 (10.c4 a5+=) 10...Rg8= 11.Nh4?? (11.g4 a6=) 11...a6?? (better 11...Bg3 12.Bf3 Bh4–+) 12.Bf3= Bf3 13.Qf3 Ra7 14.ba6 (14.Nc3 Be5 15.0–0=) 14...Ke7 (14...Qc2 15.0–0 Qc6 16.Qh5+=) 15.0–0 (better 15.Nc3!? Qc6 16.Qe2+=) 15...Qc2=+ 16.Qh5 (16.Qe2 Be5 17.Ra3 Nc6=) 16...Nc6 (better 16...Ra6!? 17.Ra6 Na6–/+) 17.Qh7?? (17.Nc3 Be5 18.Rfc1 Qd2 19.Qh7 Bc3 20.Nf3= (worse 20.Qg8 Ba1 21.Ra1 Qd3–/+)) 17…Qh7–+ 0–1. GuestJGHX – Guestfaqih, freechess.org, 2019.

5.ab5 d6 6.e3 e5 7.Nf3 f6 8.Bc4 (8.Nc3 d5+–) 8...Ne7 (8...d5 9.Bb3+–) 9.Be6 (better 9.Nc3 d5 10.Bb3+–) 9...g5? (better 9...d5!? 10.Nc3 Qd6+–) 10.d4+– Bd5? (10...Nd7 11.Nc3 Bg7+–) 11.Ng5! fg5 (11...Be6 12.Ne6 Qc8+–) 12.Qh5 Ng6 13.Bd5 Be7 (13...Nd7 14.Qf3 Qc8 15.Ba8 Qc2 16.Qe2 Qe2 17.Ke2+–) 14.Ba8 Nd7 (14...Qd7 15.Nc3+–) 15.Bc6 0–0 16.Ra7 h6 1–0. GuestVNCM – GuestRQXB, freechess.org, 2020.

5.ab5 e6 6.c4 Nf6 7.e3 Be7 8.f4 0–0 9.Nf3 a6 10.Bd3 ab5 11.cb5 Qc7 12.Nc3 d6 13.0–0 Nbd7 14.Qc2 Nc5 15.Ng5 Nd3 16.Qd3 h6 17.Nf3 Ra1 18.Ra1 Bf3 19.gf3 Qc5 20.Ra7 d5 21.Ba3 Qa3 22.Ra3 Ba3 23.Na4 Bc5 24.Nc5 bc5 25.b6 c4 26.Qa3 Nd7 27.b7 Nb8 28.Qc5 Kh7 29.Qc7 g6 30.Kg2 Kg7 31.Kg3 h5 32.h4 Rg8 33.e4 Kf6 34.ed5 ed5 35.Qc8 Kg7 36.Qc7 d4 37.Qe5 1–0. jura1946 – samostrel, kurnik, 2012.

5.ab5 e6 6.e3 Bd6 7.f4 f6 8.Nf3 Ne7 9.Be2 0–0 10.0–0 Bc7 11.Bc4 d5 12.Bb3 Nd7 13.Nd4 Nc5 14.Nc3 e5 15.fe5 Be5 16.Nf3 Nb3 17.cb3 Bd6 18.Nd4 Bc8 19.Qh5 Be5 20.Nc6 Nc6 21.bc6 Qd6 22.d4 g6 23.de5 Qc6 24.Qh6 Bf5 25.Rac1 Qe6 26.Nb5 Rac8 27.Rc8 Rc8 28.Nd6 Rc2 29.Nf5 gf5 30.ef6 Qf7 31.Qg5 Qg6 32.Qg6 hg6 33.Bd4 Ra2 34.Rc1 Kf7 35.Rc7 Kf8 36.Rh7 b5 37.Bc5 1–0. jura1946 – andrzejopole, kurnik, 2012.

5.ab5 e6 6.e3 Nf6 7.f4 Be7 8.Nf3 0–0 9.Bd3 Nd5 10.0–0 Nb4 11.Bh7 Kh7 12.Ng5 Bg5 13.fg5 Qg5 14.Rf2 d6 15.Ba3 a5 16.ba6 N8a6 17.Nc3 Rfc8 18.Bb4 Nb4 19.Ra8 Ba8 20.Qb1 Qc5 21.Rf7 Nd5 22.Nd5 Qd5 23.c4 Qe4 24.Qe4 Be4 25.Rf4 Rc4 26.Kf2 Bg6 27.Rh4 Kg8 28.Rc4 d5 29.Rc6 b5 30.Re6 Bd3 31.Rd6 Bc4 32.Rb6 Kf7 33.g4 g6 34.h4 Kg7 35.g5 Kf7 36.Rf6 Kg7 37.Kg3 b4 38.Rb6 b3 39.Rb7 Kf8 40.Kf4 Ke8 41.Ke5 Kd8 42.Kf6 Kc8 43.Rb4 Kc7 44.Kg6 Kd6 45.Kf6 Kc5 46.Rb8 Bb5 47.d4 Kb4 48.g6 b2 49.g7 1–0. jura1946 – samostrel, kurnik, 2012.

5.ab5 Nf6 6.e3 e6 7.f4 Be7 8.Nf3 0–0 9.c4 d5 10.Nc3 Re8 11.Ne5 dc4 12.Nc4 Nbd7 13.Ne5 Ne5 14.fe5 Nd5 15.Ne4 Ne3 16.de3 Be4 17.Qg4 Bg6 18.Be2 Bg5 19.Bd4 Bh4 20.g3 Be7 21.0–0 Bf5 22.Qf3 Bg6 23.g4 Rc8 24.Ra7 Rc7 25.Bb6 1–0. jura1946 – tapirello, kurnik, 2012.

4.a4 c5

5.c4 d5 6.e3 Nf6 7.cd5 Nd5 8.Nc3 e6 9.Nd5 ed5 10.Qg4 d4 11.ed4 cd4 12.Bd4 h5 13.Qe2 Qe7 14.Nf3 Bf3 15.gf3 Qe2 16.Be2 Rh6 17.f4 Nd7 18.Rg1 g6 19.Rc1 Bd6 20.Be3 Rh7 21.Rc6 Ke7 22.f5! Bh2? 23.Rg2 Be5 24.fg6 fg6 25.Rgg6 Rf8? 26.Bg5 Bf6 27.Bf6 Rf6 28.Rgf6 Nf6 29.Rc7 Ke6 30.Rh7 Nh7 31.Bh5 Kd5 32.Bd1 Ng5 33.f4 Ne6?? 34.Bb3 Kd6 35.Be6 Ke6 36.Kf2 Kf5 37.Kf3 Ke6 38.d4 Kd5 39.f5 Kd4 40.f6 Kc4 41.f7 Kb4 42.f8Q Ka4 43.Qe8 Ka5 44.Ke4 Kb4 45.Kd4 Ka5 46.Kc4 a6 47.Qa8 Ka4 48.Qa6# 1–0. typ48 – romicas, kurnik, 2012.

5.c4 d6 6.e3 Qc7 7.Nf3 Nd7 8.Be2 0–0–0 (better is 8...e5!?+=) 9.0–0 e5 10.d4 (10.a5 ba5 11.Bc3 Nb6+/–) 10...e4 (10...cd4 11.ed4 Re8 12.a5+/–) 11.Nfd2 f5 (11...d5 12.a5+/–) 12.d5+– Ngf6 13.Bc3 White prepares a5 (13.a5 g6+–) 13...g5 14.a5 h5 (14...Bg7!?+–) 15.ab6 ab6 16.f3 ef3 17.Nf3 Bh6 18.Nbd2 Rde8+/– 19.Qc2 Re3? 20.Qf5?? Re2 21.Bf6= g5 seems the pivot of the position 21...Kb8?? 22.Bh8+– g4 23.Qh5 gf3 24.Nf3 Be3 25.Kh1 Qd8 26.Nh4 Rc2 27.Nf5 Bd4 28.Bd4 cd4 29.Nd4 Rc4 30.Nc6 Bc6 31.bc6 Nc5 32.Qh7 Qc7 33.Rf8 (33.Rf8 Qc8 34.Qa7#) 1–0. popovicigelu – 1waldemaro, kurnik, 2011.

5.c4 d6 6.e3 Nd7 7.Nf3 Qc7 8.Be2 0–0–0 (better is 8...e5!?+=) 9.0–0 e5 10.d4 f6 (10...cd4!? 11.ed4 d5+/–) 11.d5+– g5 12.Bc3 White prepares the advance a5 12...h5 13.a5 h4 14.ab6 ab6 15.Nbd2 Bg7 16.Ne4 Rh7 (16...g4 17.Nfd2 f5 18.Ng5+/–) 17.h3 Nh6 18.Bd3 Re8? (better is 18...Rhh8+–) 19.Nd6! Qd6 20.Bh7 f5 21.Ng5 Bf6 22.Ne6 Rh8 23.Bg6 Rg8 24.Bh5 Nf8 25.Nf8 Qf8 26.Qa4 Qg7 27.Bf3 e4 28.Bf6 Qf6 29.Qd1 ef3 30.Qf3 Nf7 31.e4 Ng5 32.Qf5 Qf5 33.ef5 Nh3? 34.Kh2+– Nf4 35.g3 hg3 36.fg3 Rh8 37.Kg1 Ne2 38.Kg2 Rg8 39.Rf3 Nd4 40.Raf1 Nf3 41.Rf3 Kd7 42.f6 Ke8?? 43.f7 Kf8 44.fg8Q Kg8 45.Rf6 Bc8 46.Rb6 Kf7 47.Rc6 Bf5 48.Rc5 Kf6 49.b6 Be4 50.Kf2 Ke7 51.b7 Kd6 52.Rc6 Kd7 53.b8Q Bd5 54.Qd6 Ke8 55.Rc8 Kf7 56.Qd5 Kg6 57.Rc6 Kg7 58.Qd7 Kf8 59.Rc8# 1–0. fagus54 – borin, kurnik, 2012.

5.c4 d6 6.e3 e6 7.Nf3 Nd7 8.Be2 Ngf6 9.0–0 g6 10.Bc3 Bg7 11.d3 0–0 12.a5 Rc8 (12...a6 13.Qb3=) 13.a6 Ba8 14.Nbd2 d5 15.cd5 Bd5 16.e4 Ba8 17.Ne5 (better is 17.Nc4+=) 17...Ne5–/+ 18.Be5 Qd7 (18...Ne4 19.Bg7 Nd2 20.Bf8–/+) 19.Rc1 (19.Nc4 Ne8=) 19...Qe7 (better is 19...Qb5!? 20.d4 Qd7 21.dc5 Rc5 22.Rc5 bc5+=) 20.Nc4+= Rcd8 21.Qb3 Rd7 22.f3 Rfd8 23.Rcd1 Bh6 24.Qc3 Ne8 25.h3 f6 26.Bg3 e5 27.Qb3 Kh8 28.Nb2 Be3 29.Kh1 Bd4 30.f4 Ng7 31.Nc4 ef4 32.Bf4 Qe6 33.Bg4 f5 34.ef5 gf5 35.Bf3 Bf3 36.Rf3 Nh5 37.Bh2 Rg8+= 38.Qc2 Rdg7 39.g3?? Ng3–+ 40.Bg3 Rg3 41.Rg3 Rg3 42.Qh2 f4 43.Qd2 Qh3 44.Qh2–+ Qg4 45.Rf1 Rh3 46.Nd6 Rh2 47.Kh2 Qg3 48.Kh1 Qh3# 0–1. olawoj – atena208, kurnik, 2012.

5.e3 d5 6.Nf3 e6 7.c4 Nd7 8.Be2 Ngf6 9.0–0 Be7 10.d4 dc4 11.Bc4 0–0 12.Nbd2 Bd6 13.h3 Qc7 14.dc5 Nc5 15.Qc2 Nd5 16.Ng5 g6 17.Ngf3 Nd7 18.Rfc1 Nb4 19.Qc3 f6 20.Be6 Kg7 21.Qc7 Bc7 22.Rc7 Bf3 23.Rd7 Kh6 24.Nf3 Rfd8 25.Rad1 Rd7 26.Rd7 f5 27.Bg7 Kh5 28.g4 fg4 29.Bg4 1–0. chybol3 – edwin300184, kurnik, 2012.

3.b5 Nc6??

4.bc6+– Bc6 5.e3 Nf6 6.Bf6 ef6 7.h4 (7.Nf3 a6+–) 7...Bb4 8.h5 Bc5 9.h6 g6 10.Rh4 (10.d4 Be7+–) 10...g5 (10...f5 11.Nf3+–) 11.Rc4 (11.Rh5 Bd5+–) 11...Qe7 12.d4 (12.Nf3 Qf8+–) 12...Bb4? (better 12...d5!? 13.Rc3 Bb4+–) 13.c3+– Ba5 (13...Bd6 14.d5 Bb7 15.a4+–) 14.Rc6! dc6 15.Qf3 Qd6 16.Bc4 Rf8 (16...0–0–0 17.Ne2+–) 17.Bd3 0–0–0 18.Bf5 (18.Ne2 Kb8+–) 18...Kb7 19.Be4 Bc3?? (better 19...Rde8+–) 20.Nc3 f5 21.Bf5 f6 (21...Qh2 22.Nce2 Qh6 23.Rc1+–) 22.Be4 (22.Ne4 Qd5+–) 22...Qb4 (22...f5 23.Bf5 g4 24.Qg4+–) 23.Nge2 (23.Bc6 Kb8 24.Nge2 Qa3+–) 23...Qb2 (23...Qd6 24.Ng3+–) 24.Bc6 Kb8 25.Rc1 1–0. atif_zubair – slimshady29, lichess.org, 2019.

3.b5 d5

4.a4 a6 5.e3 Nf6 6.c4 (6.Nf3 e6=) 6...dc4=+ 7.Bc4?? (better 7.Nf3=+) 7...Bg2–+ 8.Qb3 e6 (8...Bh1?? 9.Bf7 Kd7 10.Qe6) 9.ba6 Na6 (9...Bh1 10.a5–+) 10.Bb5 (10.Ba6 Bh1 11.a5 ba5 12.Ra5–+) 10...Nd7 11.Qc4 Nac5 12.Qg4 (12.Bg7 Bg7 (12...Bh1?! 13.Bd7 Kd7 14.Bh8–+) 13.Qg4 Bh1 14.Qg7 Ke7–+) 12...Bh1 13.Bg7 (13.Nf3 h5 14.Qf4–+) 13...Rg8 14.Nc3 (14.Nh3 c6 15.Be2 Rg7–+) 14…Rg7 (14...Rg7 15.Qg3 Rg3 16.hg3 c6–+) 0–1. AleksandrNekhoroshik – elnordis, lichess.org, 2020.

4.a4 Nf6 5.Bc3 e6 6.Be5 Nbd7 7.d4 Ne5 8.de5 Ne4 9.Nf3 Bc5 10.Nd4?? (10.e3 0–0–/+) 10...0–0 (better 10...Nf2 11.Qd2 Nh1–+) 11.Qd3? (better 11.e3–/+) 11...Qh4–+ 12.g3 Qe7 (12...Nf2!? 13.gh4 Nd3 14.ed3 Bd4 15.c3 Be5 16.d4–+) 13.Bg2 (13.f3!? f6 14.fe4 de4–/+) 13...f6–+ 14.0–0? (better 14.f3 fe5 15.c3 Nc3 16.Nb3 Nb1 17.Nc5 Qc5 18.Rb1–+) 14...fe5 15.Be4 (15.Nf3 Nf2 16.Rf2–+) 15...de4 (15...ed4?! 16.Bh7 Kh8 17.Bg6–/+) 16.Nc6 ed3 (better 16...Bf2 17.Rf2 Qc5 18.Ne7 Kh8 19.Qd1 Qf2 20.Kh1–+) 17.Ne7 Be7 18.cd3 e4 19.d4 (19.de4 Be4 20.Nd2 Bb7–+) 19...c5 (19...Bf6 20.Na3–+) 20.dc5 Bc5 21.e3 Bd5 22.Nc3 a6 23.h4 Rfd8 24.Kh2 ab5 25.Nb5 h6 26.h5 Bc4 27.Rfb1 (27.Rfc1 Be2 28.Nc7 Ra5 29.Ne6 Rd2 30.Nc5 bc5–+) 27...Rd2 28.Kg1 Bd3 29.Rc1 (29.Nc3 Rf8 30.Nd1 Bb1 31.Rb1 Rf5–+) 29...Kf7 (better 29...Rf8 30.Rd1 Rb2 31.Rf1 Bf1 32.Rf1 Rff2 33.Rf2 Be3 34.Kf1 Rf2 35.Ke1–+) 30.Nc7 Rd8 (better 30...Ra5!? 31.Nb5–+) 31.a5 Rc8 32.ab6 Bb6 33.Ne6 Rc1 (33...Ke6?! 34.Rc8 Be2 35.Rc6 Rd6 36.Rd6 Kd6 37.Ra8–+) 34.Rc1 Be3 35.Nd8 Ke8 36.fe3 Kd8 37.Rc5 Re2 38.g4 Re3 39.Kf2 (39.Kh2 Kd7–+) 39...Re2 (better 39...Rf3!? 40.Ke1–+) 40.Kg3 Ke7 41.Rc7 Kf6 42.Rc6 Kf7 43.Rc7 Kg8 44.Rc8 Kh7 45.Rd8 Re1 46.Kf2 (46.Rd6 Rf1–+) 46...Rf1 47.Ke3 (47.Kg2 Rf4 48.Kg3 Rf3 49.Kh2 Be2–+) 47...Rf7 (47...Rf3!? 48.Kd2–+) 48.Rd6 Rf6 49.Rd8 (49.Rf6 gf6 50.Kd2 Bb5–+) 49...g5 (49...Rf3 50.Kd4–+) 50.hg6 (50.Rd7 Kg8–+) 50...Kg6 51.Rd5 Rf3 52.Kd2 Rf4 53.Rd6 Kg5 0–1. hamiltonharris (1955) – claymil (1910), ChessWorld.net, 2019.

4.e3 c5 5.c4 d4 6.ed4 cd4 7.Nf3 Bf3 (7...Qd6!?+–) 8.Qf3 Nd7 1–0. DEFFM – GuestDXVC, freechess.org, 2019.

4.e3 c6 5.a4 cb5 6.ab5 (6.Bb5 Nc6+=) 6...e6 (6...Nd7 7.Nf3+=) 7.Nf3 (7.Nc3 Nd7+=) 7...Nf6 8.c4 (8.Nc3 Nbd7+=) 8...dc4 (8...Nbd7 9.cd5 Nd5 10.Na3+=) 9.Bc4 (9.Na3 Be7+=) 9...Bd5 (9...Bd6 10.d4+=) 10.Bb3 (10.Bd5 Qd5 11.Bf6 gf6+–) 10...Be7 11.Nc3 Bb3 12.Qb3 0–0 13.0–0 Nbd7 14.d4 (better 14.Ba3+–) 14...Nd5? (better 14...Qb8!?+–) 15.Nd5+– ed5 16.Qd5 Nf6 17.Qd8 (17.Qb7 Qe8+–) 17...Rfd8 18.Ne5 Bd6 (18...Rd5 19.Nc6 Bd6 20.Na7+–) 19.Nc6 Rdc8 (19...Rd7 20.Rfd1+–) 20.Ra7 (better 20.d5!?+–) 20...Ra7+– 21.Na7 Rc2 22.Rb1 (better 22.Ba1!?+–) 22...Ne4= 23.Bc1?? (better 23.Ba1=) 23...Nc3–+ 24.Ra1 Ne2 25.Kf1 Rc1 (better 25...Nc1!? 26.g3 Nd3–+) 26.Rc1=+ Nc1 27.Ke1 (27.Nc8 Bc7 28.Ne7 Kf8=+) 27...Nd3 (27...Kf8 28.Kd2 Na2 29.g3–/+) 28.Ke2 Nb4 29.g3 f5 (29...Kf8!?–/+) 30.Nc8=+ Bc7 31.Ne7 Kf7 32.Nf5 Kf6 (32...g6 33.Nh4=) 33.Nh4 (33.e4 Nc2=) 33...g5 (33...Nc2 34.Kd3 Na3 35.e4=) 34.Nf3 (34.Ng2 Ke6=) 34...h5 (34...Nc2 35.Nd2=) 35.Nd2 (35.Kd2 Kf5 36.Kc3 Nd5 37.Kd3 Nf6=) 35...Nd5 (35...Ke6 36.h3=) 36.Ne4 (36.Kd3 Nb4 37.Kc3 Nd5 38.Kc4 Ne7+=) 36...Kf5= 37.f3 Bb8 (37...g4 38.Kf2=) 38.Kd3 Nc7 (38...Nb4 39.Kc3 Nd5 40.Kd3 Nb4 41.Kc3 Nd5 42.Kd3=) 39.Nd6 (39.Nc3!?+–) 39...Ke6= 40.Nc4 Ba7 (40...Nb5 41.Nb6 h4 42.gh4 gh4 43.h3=) 41.e4 (41.Na3 Bb8+=) 41...Nb5 42.d5 Ke7 (42...Kd7 43.f4 gf4 44.gf4=) 43.e5 (43.Ne5 Kd6 44.Nf7 Kd7 45.Ng5 Nc7+–) 43...h4 (43...Nd4 44.Nd6 Nf3 45.Ke4 Nd2 46.Kd3=) 44.gh4+= gh4 45.h3 Bb8 (better 45...Kd7+=) 46.Ke4 (better 46.f4!? Bc7 47.Ne3+–) 46...Nc3=+ 47.Kd4 Ne2 48.Ke4 Ng1 (48...b5 49.Na5 Kd7 50.Nc6=+) 49.Nb6 Nh3 50.d6 Kd8 51.f4?? (better 51.Nc4=) 51...Ng1–+ 52.Ke3 h3 (better 52...Ba7 53.f5 Bb6 54.Kf4 Kd7–+) 53.Kf2= Ba7 54.Kg1 Bb6 55.Kh2 Be3 56.Kh3 Bf4 57.Kg4 Be5 58.Kf5 Bd6 ½–½. weisstra – kdfoerster, caissa.com, 2007.

4.e3 c6 5.a4 c5 6.c4 e6 7.Nf3 Nf6 8.Be2 Be7 9.0–0 0–0 10.d4 10...dc4 11.Bc4 Nd5 (11...a6 12.Qe2=) 12.dc5+= Bc5 13.Nd4. GuestXQVF – GuestTNXS, freechess.org, 2018.

4.e3 Nd7 5.d4 e6 6.Nf3 Ngf6 7.Nbd2 Bb4 8.Bd3 0–0 (8...a6 9.a4=) 9.c3 (9.0–0 a6=) 9...Bd6 10.0–0 Re8 (10...Qe7 11.Qe2=) 11.c4 c6 (11...e5 12.de5 Ne5 13.Ne5 Be5 14.Be5 Re5 15.Nf3=) 12.bc6 Bc6 13.Ne5 Bb7 (13...Be5 14.de5 Nc5 15.Bc2= (worse 15.ef6 Nd3 16.Qg4 g6–/+)) 14.f4 Rc8 15.Rf2 (15.Rc1 Bb4=) 15...h6 16.Rc1 Ba6 (better 16...Qe7!?=) 17.Qa4+– Bb7 18.Qa7 Rb8 19.Re2 (19.Rff1 Be5 20.fe5 Ng4+=) 19...Bb4 (19...Re7 20.Qa4+–) 20.c5 (20.Ndf3 Ne5 21.Ne5 Qe7+–) 20...bc5 (better 20...Re7 21.Nd7 Rd7 22.Qb6 Qb6 23.cb6 Rd6+–) 21.dc5+– Bd2?! (21...Qe7 22.c6 Nc5+–) 22.Rd2 Ne5 23.Be5 Ng4 (23...Bc6 24.Bb8 Qb8 25.Qb8 Rb8+–) 24.Bb8 Qb8 (24...Bc6 25.Rb2 d4+–) 25.Qb8 Rb8 26.Rb2 1–0. GuestGMHQ – GuestTWGS, freechess.org, 2020.

4.e3 e6 5.c4 dc4 6.Bc4?? (6.Nf3 a6 7.Bc4 ab5 8.Bb5 c6=) 6...Bc5 (better 6...Bg2 7.Bg7 Bg7–+ (7...Bh1?! 8.Bh8 a6 9.ba6=)) 7.Nf3 (7.Qg4 Ne7+=) 7...Nf6= 8.d4 Bb4 9.Nbd2 Ne4 (9...a6 10.0–0=) 10.0–0+= Nd2 11.Nd2 c5 (11...a6 12.a3 Bd6 13.Qg4+=) 12.bc6 (12.a3 Bd2 13.Qd2 0–0+–) 12...Bc6 13.Qb3?? (better 13.a3 Bd2 14.Qd2+=) 13...Bd2–+ 14.Ba3? (14.Be6 0–0 15.Bc4 Qd7–/+) 14...a5 (14...Qg5!? 15.d5 ed5 16.Bb5–+) 15.Bb5? (15.Be6!? Qf6 16.Bc4–/+) 15...Bb5 (15...Bb4 16.Bc6 Nc6 17.Rfc1–+) 16.Qb5 Qd7 (16...Nd7 17.Qb2 Bb4 18.Bb4 ab4 19.Qb4–+) 17.Qb6 (better 17.Qb2 Bb4 18.Bb4 ab4 19.Qb4–+) 17...Bb4 (17...Nc6!? 18.Rfd1 Rb8 19.Qc5–+) 18.Bb4–/+ ab4 19.Qb4 Nc6 20.Qc5 Rc8 21.Rfc1 (21.a4 Na7 22.Qh5 0–0–/+) 21...Ne7 22.Qg5 (22.Qa5 0–0–/+) 22...Rc1 (22...0–0 23.a4–/+) 23.Rc1 0–0 24.a4 Nf5 25.Ra1 Ra8 26.g4 Nh6 27.h4 (27.Qf4 Qb7–+) 27...f6 (27...Qb7 28.a5–+) 28.Qf4 e5 29.de5 fe5 (29...Ng4?! 30.Qc4 Kf8 31.Qb4 Kg8 32.Qc4 Kh8 33.e6=+) 30.Qg3 (30.Qc4 Kh8 31.g5 Nf7–+) 30...Ra4 (30...Ng4!? 31.a5–+) 31.Ra4 Qa4 32.g5 Nf5 (32...Nf7 33.f4–+) 33.Qe5 Qg4 34.Kf1 Threatening mate... how? 34...Qc4 (34...Kf7 35.Qd5 Kg6 36.Qd3–+) 35.Kg2 (better 35.Kg1!? Qc8 36.h5=+) 35...Nh4–+ 36.Kh3 Do you see the mate threat? 36...Ng6 37.Qe8 Nf8 38.f4 Qf1 (38...Qe6 39.Qe6 Ne6 40.Kg4–+) 39.Kg4 Qg1 (39...Qg2 40.Kf5–+) 40.Kf5–/+ Qg3 41.e4 g6 42.Ke5 Kg7?? (better 42...Qc3 43.Kd5 Qe3–+) 43.Qe7= Kg8 (43...Kg8 44.Qe8 Qc3 45.Kd5 Qe3–+) 0–1. AleksandrNekhoroshik – chopiy, lichess.org, 2021.

4.e3 f6 5.c4 c6 (5...e5+–) 6.a4 (6.Nc3 dc4 7.Bc4 cb5 8.Qh5 g6 9.Qb5 Qd7+–) 6...Nd7 (better 6...e5!?+=) 7.Nf3+– Nc5 (7...cb5 8.ab5 e6 9.cd5 Bd5 10.Nc3+–) 8.d4 (8.bc6 Bc6 9.cd5 Qd5+–) 8...Ne4+– 9.Bd3 Nd6 (better 9...e6!? 10.0–0 Bb4+–) 10.bc6+– Bc6 11.cd5 Bd5 12.0–0 Qd7 13.Nbd2 a5? (13...e6+–) 14.e4 Bc6 (14...Bb7+–) 15.d5 Ba4 (15...Ne4 16.Nd4 Ba4 17.Ra4 Nd2 18.Bb5 Nf1 19.Bd7 Kd7 20.Qf1+–) 16.Ra4 b5 17.Ra1 b4 (17...Qb7 18.Nd4 a4 19.Ne6+–) 18.e5 fe5 (18...Nb5+–) 19.Ne5 Qa7 20.Qh5 g6 21.Bg6! Kd8 (21...hg6 22.Qh8 Pinning (22.Qh8 Deflection)) 22.Nc6 Kc7 23.Na7 Ra7 24.Bh8 a4 25.Rfc1 Nc4 26.Rc4 (26.Rc4 Kb6 27.Bd4 Ka5 28.d6 e5 29.Qe5 Ka6 30.Rb4 hg6 31.Raa4) 1–0. GuestRNVJ – GuestFCNQ, freechess.org, 2019.

4.Nf3 e5 (4...Nf6 5.e3=) 5.Be5 Nf6 6.e3 Bd6 7.Bb2 (7.Bd6!? Qd6 8.Nc3+–) 7...0–0 8.d4 (8.Nc3 Nbd7+=) 8...Ne4 9.Bd3 Re8 (9...a6 10.a4=) 10.0–0 Qf6 (10...a6 11.a4+=) 11.Ne5+– Be5 (11...Qe6 12.Nd2+–) 12.de5 Qg6?? (better 12...Qe7+–) 13.f3+– Re5 (13...Nd7 14.fe4 Ne5 15.Be5 Re5+–) 14.Be5 Nd7 (14...Qe6 15.Bg7 Kg7 16.fe4+–) 15.Bd4 Ndf6 (15...Rd8 16.Qe2 Ndc5 17.fe4 Nd3 18.Qd3 Qe4 19.Qa3+–) 16.fe4 de4 17.Bc4 Ng4 (17...Rd8+–) 18.Bf7 Qf7 19.Rf7 Kf7 20.Qg4 Kg8 (20...Rf8 21.Qd7 Kg6 22.Qg7 Kf5 23.Qf8 Ke6 24.Nc3 c5 25.Rf1 cd4 26.Rf6 Kd7 27.Rf7 Ke6 28.Qe7) 21.Qg7 1–0. DEFFM – GuestTNTX, freechess.org, 2019.

3.b5 d6

4.a4 a6 5.Nc3 ab5 6.ab5 Ra1 7.Qa1 e6 8.Qa7 Qc8 9.Nf3 Nf6 10.e3 Be7 11.Be2 0–0 12.0–0 Ne4 13.Ne4 Be4 14.Qa1 f6 15.Qa2 Bc2?? (better is 15...Bd5 16.c4 Be4+/–) 16.d3+– c6 (16...c5 17.bc6! d5 18.Nd4 Bd3 19.Bd3 Nc6 20.Rc1+–) 17.Rc1 cb5 18.Nd4 d5 19.Rc2 Qd7 20.Bg4 f5 21.Bf3 Bc5 (21...Rd8 22.e4 Bf6 23.ef5 ef5+–) 22.Ne6! Re8 (22...Qe6 23.Bd5 Pinning (23.Bd5 Decoy)) 23.Bd5 Kh8 24.Ng7 Qg7 25.Qa1 (25.Qa1 Bd4 26.Bd4 h5 27.Bg7 Kh7 28.Qf6 Re6 29.Be6 Nc6 30.Qh6#) 1–0. waller – third, internet, 2011.

4.a4 Nd7 5.e3 f6 6.Nf3 g6 (6...a6 7.Nd4+=) 7.Be2 (7.Ng5 Nc5+=) 7...Bg7 8.0–0 e6 (8...e5 9.a5+=) 9.d4 (9.a5 ba5 10.Nd4 Nc5+–) 9...Ne7+= 10.c4 0–0 11.Nc3 c5 (11...a6 12.Qb3+=) 12.Rc1 (12.bc6!? Bc6 13.d5+–) 12...cd4+= 13.Nd4 (better 13.ed4 Rc8 14.Re1+=) 13...d5?? (better 13...Nc5=) 14.Ne6+– Qc7 (14...Qb8 15.Nf8 Kf8 16.cd5 Qd6+–) 15.Nd5 (15.Nc7 Rac8 16.Ne6 Rfe8+–) 15...Bd5 (15...Nd5 16.Nc7 Nc7 17.Qd7 Rf7+–) 16.Nc7 Rac8 17.cd5 Nd5 18.Qd5 Kh8 19.Qd7 Rfd8 20.Qf7 (20.Qf7 Rf8 21.Qe7+–; 20.Ne6 Bh6 21.Rc7 Rc7 22.Qd8 Bf8 23.Qf8) 1–0. BeepBeepImAJeep (2560) – orjinaladam, lichess.org, 2017.

4.c4 Nd7 5.d4 Ndf6 6.e3 Qd7 7.Nf3 0–0–0 8.Nc3 Ne4 9.Ne4 Be4 10.a4 Nf6 11.a5 e6 12.ab6 ab6 13.Be2 Bb7 14.0–0 d5 15.Nd2 Ne4 16.Bf3 f5 17.cd5 ed5 18.Qa4 Bd6 19.Ne4 fe4 20.Be2 Rhf8 21.h3 Rf6 22.Bg4 Re6 23.Qc2 h5 24.Bh5 Qe7 25.Bg4 Rf8 26.Rfc1 Rff6 27.Ra7 Rg6 28.Be6 Qe6 29.Rb7 Kb7 30.Qc6 Kb8 31.Ra1 Rg2 32.Kg2 Qg6 33.Kf1 1–0. popovicigelu – maslo1kg, kurnik, 2012.

4.c4 Nd7 5.Nf3 e5 6.e3 g6 7.d4 Bg7 8.Nbd2 ed4 9.ed4 Qe7 10.Be2 0–0–0 11.0–0 Ngf6 12.a4 Rhe8 13.a5 Qe2 14.Qe2 Re2 15.a6 Bf3 16.Nf3 Rb2 17.c5 dc5 18.dc5 Ne4 19.cb6 cb6 20.Rac1 Kb8 21.Rc4 Nd2 22.Nd2 Rd2 23.h3 Nc5 0–1. trutmo – gasparetti1, kurnik, 2012.

4.c4 e5 5.e3 Be7 6.d4 ed4 7.ed4 Nf6 8.d5 0–0 9.Nf3 Re8 10.Be2 Nbd7 11.0–0 Nc5 12.Nbd2 Nfe4 13.Ne4 Ne4 14.Nd2 Nd2 15.Qd2 Bf6 16.Bf6 Qf6 17.Bd3 Re7 18.Qc2 h6 19.Rfe1 Rae8 20.Qd2 Bc8 21.a4 Bd7 22.a5 Re5 23.ab6 ab6 24.Re5 Qe5 25.Qd1 Bf5 26.Bf5 Qf5 27.Ra7 Qe4 28.Qf1 Re7 29.g3 Kh7 30.Qc1 Qd4 31.Qc2 g6 32.Kg2 Qf6 33.h4 Qd4 34.h5 Qf6 35.hg6 Qg6 36.Qg6 fg6 37.g4 Kg7 38.Kg3 Kf6 39.Kf3 Ke5 40.Ke3 h5 41.f4 Kf6 42.Kf3 h4 43.Ra8 g5 44.Rh8 Rg7 45.f5 Ke5 46.Re8 Kd4 47.Re4 Kc3 48.Kf2 Kd3 49.Kf3 h3 50.Re6 Kc4 51.Rg6 Rh7 52.f6 h2 53.Rg7 h1Q 54.Ke3 Rh3 55.Kf2 Qf3 56.Ke1 Qg2 57.Rh7 Rh7 58.f7 Rh1 0–1. popovicigelu – arb83, kurnik, 2012.

4.c4 e5 5.e3 Nf6 6.d4 e4 7.Ne2 d5 8.cd5 Bd5 9.Nf4 Bb7 10.Bc4 Bd6 11.Qb3 0–0 12.g3 (12.Nc3 a6=) 12...c6+= 13.a4 c5 (13...a6 14.Ba3+=) 14.dc5= Bc5 15.0–0 Nbd7 16.Rd1 Qc7 17.Nd5 Nd5 18.Bd5 Bd5 (18...Kh8!?=) 19.Qd5+/– Rad8 20.Qe4 Nf6 21.Qf3 Rd1 22.Qd1 Ne4 23.Nc3 Nc3+= 24.Bc3 Be3 25.Bg7 Bf2 26.Kf2 Kg7 27.Qg4 Kh8 28.Qd4 Kg8 29.Qf6 Rd8 30.Rf1 Rd2 31.Kg1 Qc5 32.Kh1 Qd5 33.Qf3 Qf3 34.Rf3 Rd4 35.Ra3 f5 36.Kg2 Kf7 37.a5 Rb4–/+ 38.ab6 ab6 39.Rf3 Kg6 40.Rd3+= Rb5 41.Rd6 Kg5 42.h4 Kg4 43.Rd4 Kh5 44.Rd7 Kg6 45.Rd6 Kg7 46.Kf3 h6 47.Kf4 Kh7 48.Rd7 Kg6 49.Rd6 Kh5 50.Rf6 Exerts pressure on the isolated pawn 50...Rb4 51.Kf5 Rb5 52.Kf4 Rb4 53.Kf3 b5 54.g4 Kh4 55.Rh6= Kg5 56.Rh5 Kg6 57.Re5 Rb3 58.Kf4 White intends g5 58...b4 59.g5 Rb1 60.Re6 Kg7 61.Kf5 b3 62.Re7 Kg8 63.Kg6 Kf8 64.Rb7 b2 65.Rb8 (65.Rb8 Ke7 66.Kg7=) 1–0. popovicigelu – florindidi, kurnik, 2011.

4.d4 Nd7 5.c4 e5 6.Nc3 ed4 7.Qd4 Ndf6 8.e4 Ne7 9.Nd5 Ned5 10.cd5 Qe7 11.f3 0–0–0?? (11...Bd5 12.Bc4 Bb7 13.Ne2+=) 12.a4 (better is 12.Ne2!?+/–) 12...Bd5= 13.Bd3 Re8 14.Ne2 Bb7 15.0–0 Nd7 16.a5 Nc5 17.a6 Ba8 18.Bc4 f6 19.Bd5+/– Bd5 20.Qd5 Qe6 21.Qa8 Kd7 22.Qc6 Kc8 23.Nd4 Qf7 24.Qb7?? Nb7–+ 25.ab7 Kb7 26.Nc6 f5 27.Ra7 Kc8 28.Ra8 Kd7 29.Nb8 Ke6 30.ef5 Qf5 31.Re1 Kf7 32.Re8 Ke8 33.Nc6 Kf7 34.Nd8 Kg6 35.Ba1 Qb1 36.Kf2 Qb5 37.Ne6 Qf5 38.Nd4 Qd3 39.Kg3 c5 40.Nc6 Kh6 41.Nd8 g6 42.Nf7 Kh5 43.Kh3 Rg8?? 44.g4# 1–0. iczker – zanimruszysz, kurnik, 2012.

4.d4 Nd7 5.c4 Ngf6 6.Nc3 g6 7.Nf3 Bg7 8.e3 0–0 9.Be2 c5 10.d5 a5 11.a4 e5 12.e4 Re8 13.h3 Nf8 14.0–0 Ra7 15.Bc1 Bc8 16.Bg5 Bd7 17.Nh2 Qc8 18.Bf6 Bf6 19.Bg4 h5 20.Bd7 Rd7 21.Ra3 Bg5 22.Ne2 f6 23.Qb1 Rg7 24.f4 ef4= 25.Nf4 Bf4 26.Rf4+= Re5 27.Raf3 Nh7 28.g4 g5 29.Rf5 h4 30.Re5 de5 31.Qd3 Qd7 32.Rf5 Qd6 33.Nf3 Rf7 34.Qf1 Kf8? 35.Ne5!+– Qe5 36.Re5 fe5 37.Qa1 Re7 38.Qf1 Rf7 39.Qa1 Re7 40.Kg2 Kg7 41.Qe1 Rd7 42.Qc3 Kf6 43.Qf3 Kg7 44.Qf5 Re7 45.d6 Rf7 46.Qe5 Kg6 47.Qe6 Rf6 48.Qe8 Kg7 49.d7 Rf8 50.Qe7 Rf7 51.d8Q Re7 52.Qe7 Kg6 53.e5 (53.e5 Nf8 54.Qf8 Kh7 55.e6 Kg6 56.e7 Kh7 57.e8N Kg6 58.Qg7#) 1–0. iczker – palino47, kurnik, 2012.

4.d4 Nd7 5.d5 Ngf6 6.c4 g6 7.Nc3 Bg7 8.Nf3 0–0 9.e4 (9.Qc2=) 9...Ne5?? (better is 9...Ne4!? 10.Ne4 Bb2–/+) 10.Bd3 Bc8 11.Ne5 de5 12.0–0 a6 13.a4 Bg4 14.f3 Bd7 15.f4 ef4 16.Rf4 e6 17.e5 Nh5 18.Rf2 ed5? 19.cd5?? Be5+= 20.Qc2 Bd4 21.Re1 Nf4 22.Kf1? Bf2 23.Kf2 Qh4 24.Kf1 Qh2 25.Be4 Rfe8 26.Bc1 Qh1 27.Kf2 Qh4 28.Kf1 Nh5 29.Qf2 Ng3 30.Kg1 Qh1# 0–1. iczker – letargi, kurnik, 2012.

4.d4 Nd7 5.d5 h6 6.c4 Ngf6 7.Nc3 Nc5 8.Nf3 Qd7 9.a4 0–0–0 (better is 9...a6!?=) 10.a5+/– Re8 11.a6 (better is 11.Nd4!?+/–) 11...Ba8= 12.Na4 e6 13.Bf6 gf6 14.Nc5 dc5 15.e4? (better is 15.de6 Qe6 16.Qb3+=) 15...ed5–+ 16.cd5 Bd5 17.Be2 Be6 (better is 17...Re4!? 18.0–0 Rg8–+) 18.Qd7 Bd7 19.0–0–0 Bg7 20.Bc4 Be6 21.Be6 Re6 22.Rhe1 h5 23.Rd5 Bh6 24.Kc2 Rd8? (better is 24...Bg7+=) 25.Rh5+– Bf4 26.g3 Bd6 27.Rh7 Rf8 28.Nh4 Be5 29.Nf5 Ree8 30.f4 Bd4 31.Nd4 cd4 32.e5 fe5 33.Re5 Rd8 34.Rf5 d3 35.Kd2 Rd7 36.g4 Kd8 37.g5 Ke8 38.g6! (38.g6 f6 39.Rfh5+–) 1–0. iczker – annand, kurnik, 2011.

4.e3 (--> 3.e3 d6 4.b5).

4.e3 e5 (--> 1.b4 e5 2.Bb2 d6 3.b5 b6 4.e3 Bb7).

4.Nf3 e5 5.e4 Be4=+ 6.Bc4 Nh6 (6...a6 7.Qe2 Bc2 8.Ne5 de5 9.Qf3=+) 7.d4 (7.Qe2!? Bb7 8.d4=) 7...d5–/+ 8.Bb3 Bf3 (better 8...ed4 9.Qd4 Nf5=+) 9.Qf3+– e4 10.Qh5 Bb4 (10...g5 11.Nc3 c6 12.bc6 Nc6 13.Nd5+–) 11.Nd2 (11.c3 Bd6+–) 11...0–0? (11...Bd2 12.Kd2 0–0 13.Qd5 Nd7+=) 12.Bd5?? (12.c3 Be7 13.Qd5 Nd7+–) 12...c6 (better 12...Bd2 13.Kd2 g6 14.Qh6 Qd5=+) 13.bc6+– (worse 13.Be4 f5 14.Bd3 Bd2 15.Kd2 cb5 16.Bb5 Qd5+–) 13...Na6 (better 13...Bd2 14.Kd2 Qf6 15.Be4 Qf4 16.Kd3 Na6+–) 14.c7?? (better 14.c3 Ba5 15.0–0+– (15.Ne4?! Nc7 16.Bb3 Qd4+=)) 14...Qc7+= 15.Ba8 Ra8 16.c3 (16.Rc1 Qc4 17.c3 Qa2 18.Rb1+– (worse 18.cb4 Qb2 19.Rb1 Qd4–/+)) 16...Bc3= 17.Bc3 Qc3 18.Qd5?? (18.Rd1 e3 19.fe3 Qe3 20.Qe2 Qd4 21.Qe4 (21.Qa6?? Re8 22.Qe2 Re2 23.Ke2 Ng4–+) 21...Qe4 22.Ne4=) 18...Qa1 (better 18...Nc7 19.Qa8 Na8–+) 19.Ke2+– Re8 (19...Nc7 20.Qa8! Na8 21.Ra1 Nc7+–) 20.Ra1 e3 (20...Ng4 21.Qd7 Nf6 22.Qa7+–) 21.fe3 Ng4 22.Nc4 Nb4 (22...Nf6 23.Qb7 Nb4 24.Nd6+–) 23.Qb5 Nc2 (23...Re6 24.Qb4 g6+–) 24.Qe8 1–0. AvImd (1740) – lavendel63 (1675), lichess.org, 2021.

4.a4 e5

5.e3 a5 6.c4 Nd7 7.Nf3 f5 (7...Ngf6 8.Be2=) 8.Be2 Ngf6 9.0–0 h6 (9...Qe7!?+=) 10.d4+– e4 (10...Qe7 11.Nh4 Qf7 12.Nf5 g6+–) 11.Nfd2 (11.Nh4 Rg8 12.Nf5 g6+–) 11...g5? (11...g6 12.f4+=) 12.Nc3 (better 12.Bh5!? Nh5 13.Qh5 Ke7 14.Qg6+–) 12...Bg7 13.f3 0–0 14.fe4 fe4 15.Bg4 (15.Qb3!? Kh7 16.Qc2+–) 15...Ng4+= 16.Qg4 The pressure on e4 grows 16...Nf6 17.Qe6 White prepares the advance d5 17...Kh8 18.d5?? (better 18.Qh3+=) 18...Bc8–+ 19.Rf6 Threatening mate: Rxh6 19...Be6 (19...Qf6?! 20.Qf6 Bf6 21.Rf1=+; 19...Bf6?! 20.Qe4 Be5 21.Qg6=+) 20.Re6 Qd7 (better 20...g4–+) 21.Nde4? (better 21.Re4 Kg8 22.Re1–+) 21...Rae8 22.Re8 Re8 23.Rf1 Re4! 24.Ne4 Exploits the pin 24...Bb2 25.h3 (25.Rf3–+) 25...Qe7 26.Nf2 Qe3 27.Kh1 (27.Rb1 Bc1 28.Kf1 Qc3–+) 27...Qe2 28.Kg1 Bd4 29.h4 g4 30.g3 Qf3 31.Kh2 Bf2 (31...Bf2 32.Rg1 Bg1 33.Kg1 Qg3 34.Kf1 Qh2 35.Ke1 g3 36.Kd1 Qf2 37.Kc1 g2 38.c5 g1Q) 0–1. BeepBeepImAJeep (2725) – VoinG (2535), lichess.org, 2020.

5.e3 Be7 6.a5 ba5 7.Nf3 Nf6=.

5.e3 Be7 6.c4 Nf6 7.Nf3 Nbd7 8.d4 Bf3 9.Qf3 0–0 10.Be2 h6 11.0–0 Nh7 12.Qg3 Bf6 13.Bf3 Rb8 14.Bc6 ed4 15.ed4 Ng5 16.a5 Re8 17.ab6 ab6 18.Qb3 Ne6 19.d5 Nec5 20.Qc2 Ne5? 21.Nd2?? Re7 22.f4+/– Ng4 23.h3?? Ne3–+ 24.Bf6?? Nc2 25.Be7 Qe7 26.Ra7 Qe3 27.Kh2 Qd2 28.Rc7 Ne3 29.Rf3 (29.Rg1 Qf2 30.Bd7 Ne4 31.Rc8 Rc8 32.Kh1 Qg3 33.Bc8 Nf2#) 0–1. ariank – jozekck, kurnik, 2012.

5.e3 Be7 6.d4 Bf6 (6...Nd7 7.de5 de5 8.Nf3+=) 7.de5 Be5 8.Nc3 (8.Be5 de5 9.Qd8 Kd8=) 8...Nf6 9.Nf3 0–0 10.Ne5 de5 11.Ba3 Re8 (11...c5 12.bc6 Nc6 13.Bd3=) 12.Qd8+= Rd8 13.Be7 Re8 (13...Rd7 14.Bf6 gf6 15.Bd3+=) 14.Bf6+/– gf6 15.Bd3 (15.0–0–0 Kg7+/–) 15...Nd7+= (15...Bg2?? 16.Rg1 Nd7 17.0–0–0+–) 16.Be4 Be4 17.Ne4 Nc5?? (better is 17...Kg7+=) 18.Nf6+– Kf8 (18...Kg7 19.Ne8 Re8 20.Ke2+–) 19.Ne8 Ke8 20.0–0 f6 21.f4 Ke7 22.fe5 fe5 23.Rf5 Ke6 24.Rh5 Rh8 25.c4 Nd7 26.Rh6 Kf5 27.Rf1 Ke4 28.Rh4 Ke3 29.Rf3 Ke2 30.Rhh3 (30.Rhh3 Rf8 31.Re3 Kd2 32.Rd3 Kc2 33.Rd7+–) 1–0. Taulien,Hans_Juergen (2350) – Neffgen,Dieter (1840), remoteschach.de, 2002.

5.e3 Nf6 6.Na3 Be7 7.c4 0–0 8.Nc2 Nbd7 9.Nf3 Nc5 10.d4 ed4 11.Ncd4 Nfe4 12.Be2 Bh4 13.0–0 Ng5?? (13...Bf6!?+=) 14.Nf5 (better is 14.Nh4 Nh3 15.gh3 Qh4 16.Bg4+–) 14...Nf3 15.Bf3 Bf3 16.Qf3 Bf6 17.Bf6 Qf6 18.Nd4 Nd3 19.Qf6 gf6 20.Nf5 Rfe8 21.Ra2 Re5 22.Nh6 Kg7 23.Ng4 Rg5 24.h3 f5 25.Nh2 h5 26.f4 Rg3 27.Rf3 h4 28.Rg3+= hg3 29.Nf3?? f6?? 30.Nd4 Kg6 31.Kf1 Rg8 32.Ke2?? Nc1–+ 33.Kf3 Na2 34.e4 fe4 35.Ke4 f5! 36.Kd5 Nb4 37.Ke6 Re8 38.Kd7 Re4 39.Nf3 Nd3 40.Kc7 Nf4 41.Kd6 Ng2 42.a5 Rf4 43.Ne5 Kg7 44.ab6 ab6 45.c5 bc5 46.Kc5 Re4 47.Nd7 Nf4 48.b6 Ne6 49.Kd5 g2 50.b7 Rb4 51.Ke6 Rb7 52.Nc5 Rb5 53.Kd5 Rc5! 54.Kc5 g1Q 55.Kd5 Qg3 56.Ke6 (56.Ke6 f4 57.Kf5 f3 58.Ke4 f2 59.Kd5 f1Q 60.Kc5 Qe5 61.Kb6 Qd6 62.Kb7 Qfa6). poganinbezdom (1630) – maciek94, kurnik, 2011.

5.e3 Nf6 6.Nf3 Be7 7.c4 0–0 8.Na3 c5 9.Nc2 a5 (9...e4 10.Ng5+=) 10.Be2 Nbd7 11.0–0 d5 (11...Qc7 12.d4=) 12.d4 (better is 12.Ne5!? Ne5 13.Be5+/–) 12...ed4 13.ed4 dc4 14.Bc4 cd4 15.Ncd4 Nc5 (15...Rc8 16.Rc1+=) 16.Qc2 (better is 16.Nc6!? Bc6 17.Qd8 Rfd8 18.bc6+/–) 16...Be4= 17.Qc3 Bb7 (17...Qc7 18.Nd2=) 18.Rfd1 Qc7 19.Nf5 Bf3 (19...Be4 20.Ne7 Qe7 21.Ne5+=) 20.Ne7 (20.gf3?! Rfe8=) 20...Qe7 21.Qf3 Nce4 22.Re1 Qb4+= 23.Qb3 Qb3 24.Bb3 Rad8 25.Ba3 Rfe8 26.f3 Nd2 27.Re8 Re8= 28.Bc2 Nc4 29.Kf2 Na3 30.Ra3 g6 31.Re3 Rc8 32.Bd3 Rc1 33.Be4 Rc4+= 34.Bc6 Ra4 35.Rd3 Kg7 36.h4 Nh5 37.g4–/+ Nf4 38.Re3 Ne6 39.Re4 Ra2 40.Kg3 a4 41.h5?? a3–+ 42.hg6 hg6 43.Ra4 Ra1 44.Kf2 a2 45.Ra3?? Nc5 46.Ke3?? Re1 47.Kd4 a1Q (47...a1Q 48.Ra1 Ra1–+) 0–1. poganinbezdom – mrozik19 (1700), kurnik, 2011.

5.e3 g6 6.Nf3 Bg7 7.Be2 Ne7 8.0–0 0–0 9.d4 e4 10.Nfd2 f5 11.f3 a6 12.fe4 fe4 13.Nc3 d5 14.ba6 Na6 15.Ba6 Ba6 16.Rf8 Qf8 17.Nb5 Bb5 18.ab5 Ra1 19.Ba1 Nf5 20.Qe2 Qb4 21.g4 Nh4 22.Qf2? g5 23.c3 Qb5 24.Qf1 Qa4 25.c4? dc4 26.Nc4?? Nf3 27.Kh1 Qc2 (27...Qc2 28.Qg1 Ng1 29.Kg1 Qc4–+) 0–1. j1a9n55 – leone44, kurnik, 2012.

5.e3 g6 6.Nf3 Bg7 7.Be2 Nf6 8.c4 0–0 9.0–0 c6 10.Nc3 cb5 11.cb5 Nbd7 12.d4 ed4 13.Nd4 Qe7 14.Bf3 Bf3 15.Qf3 Ne5 16.Qe2 h5 17.h3 Rac8 18.f4 Nc4 19.Nc6 Qe3 20.Qe3 Ne3 21.Ne7 Kh7 22.Nc8 Nf1 23.Kf1 Rc8 24.Ne2 d5 25.Be5 Re8 26.Rc1 Re7 27.Nd4 Ne4 28.Nc6 Rb7 29.Bg7 Kg7 30.Ne5 d4 31.Rd1 Ng3 32.Kf2 Nf5 33.g4 hg4 34.hg4 Ne3 35.Rd4 Nc2 36.Rc4 Na3 37.Rc3 Nb1 38.Rc1 Na3 39.Nc6 Rd7 40.Rc3 Nb1 41.Re3 Nd2 42.Re7 1–0. chybol3 – bingo01, kurnik, 2012.

3.b5 e5

4.a4 d6 5.c4 Nd7 (5...a6 6.d4 Nd7 7.Nf3=) 6.d4 Ngf6 7.de5 (7.Nf3 e4 8.Nfd2 e3 9.fe3 Ng4=) 7...de5=+ 8.Nf3 Bd6 9.e3 0–0 10.Be2 Nc5 11.0–0 h6 (better 11...Qe7=+) 12.Be5?? (12.Ne5 Qe7 13.Nd3 Qe4+=) 12...Re8?? (better 12...Bf3 13.Bf3 Be5–+) 13.Bd4 Ne6 14.Nc3 Qe7 15.Rc1 (15.Bf6 Qf6 16.Nd5 Qd8+–) 15...Rad8+= 16.Rc2 Ne4 17.Ne4 Be4 18.Rd2 Bb4 19.Rb2 (19.Ra2!?=) 19...Bc3=+ 20.Bc3 (20.Rb3 Bd4 21.ed4 Nd4 22.Nd4 Qf6=) 20...Rd1 21.Rd1? (better 21.Bd1 Qa3 22.Rb3 Qa4 23.Nd2=+) 21...Ng5?? (21...Qa3 22.Rc1 Nc5–+ (22...Qa4?! 23.Nd2 Nc5 24.Bb4=)) 22.Ng5 Qg5 23.g3 Bf5 (23...Qe7!? 24.Ra2 Ba8=) 24.Rd5+= Qg6 25.Rbd2 Bh3 26.Bf3 (better 26.Bd3!? Qg4 27.Rf5+=) 26...Qb1 27.Rd1 Qc2 28.R5d3 Qa4 29.Bd5 (better 29.Bc6 Rf8 30.Be5=) 29...Qa3?? (better 29...Be6 30.Bc6 Rf8=+) 30.Bg7!+– Qe7 (30...Kg7 31.Ra3 Discovered attack) 31.Bh6+– Kh7 32.Bf4 Rg8 (32...Be6 33.Be4 Kg7 34.Rd4+–) 33.Rd4 (33.Ra1 Bf5 34.Rda3 Be4 35.Ra7 Bd5 36.cd5 Qe4+–) 33...Rg7 (33...Be6 34.Ra1 Bd5 35.cd5+–) 34.Be4 (34.Ra1 Kg6+–) 34...f5 35.Bd5 Qf6 36.Bc6 (36.Ra1 Re7+–) 36...Bg4 37.Kg2?? (better 37.Ra1 a5+–) 37...Qg6?? (37...Bd1 38.Rd1 a5 39.Bd7+=) 38.h3 (better 38.f3 Bh5 39.Be5+–) 38...Bh3?? (better 38...Bd1 39.Rd1 a5+–) 39.Kh3+– Qh5 (39...Qf6+–) 40.Kg2 Rg4 (40...Re7 41.Rh1 Qh1 42.Kh1+–) 41.Rd7 Rg7 42.Rg7 (better 42.Bf3 Qe8 43.Rh1 Kg8 44.Bd5 Rf7 45.Rf7 Qf7 46.Ra1+–) 42...Kg7 43.Rd7 Kf8 (43...Kf6+–) 44.Rc7 (better 44.Bc7 Qg6 45.Bd6 Qd6 46.Rd6+–) 44...Qe2 45.Rc8 (45.Bd6 Kg8 46.Bd5 Kh8 47.Be5) 45...Kf7+– 46.Bd5 (46.Bd5 Kf6 47.Rc6 Kg7 48.Be5 Kf8 49.Rc7+–) 1–0. AleksandrNekhoroshik (1655) – iwansupendi (1685), lichess.org, 2020.

4.Be5 a6 5.Nc3+=.

4.Be5 c6 5.a4 d6 (5...Nf6 6.e3+=) 6.Bb2 Nf6 7.e3 Be7 (7...a6 8.Nf3+–) 8.Nf3 Nbd7 (8...a6 9.Be2+–) 9.bc6 Bc6 10.Bb5 Bb5 (10...Bb7!?+–) 11.ab5+– a5 (11...0–0 12.0–0+–) 12.ba6 Qb8 (12...Qc8 13.Qe2+–) 13.0–0 (13.Nd4 Qc8 14.Qe2 0–0+–) 13...Nc5 (13...Qc8 14.Qe2+–) 14.Qe2 Na6? (14...b5+–) 15.Bf6 Bf6 16.Qb5 Ke7 17.Ra6 Ra6 18.Qa6 Rc8 19.Na3 Bb2 (19...Qa8 20.Qd3+–) 20.Nc4 Bf6 21.Nb6 Rc6 (21...Rc2 22.Nd5 Kf8 23.Qd3+–) 22.Nd5 Kd7 23.Qa4 1–0. DEFFM – GuestBPRX, freechess.org, 2018.

4.Be5 Nf6 5.e3 Bd6 6.Bd6+– cd6 7.Nf3 0–0 8.Be2 (8.Nc3 a6+–) 8...h6 (8...a6 9.Nc3+=) 9.0–0 d5 (9...a6 10.Nc3 ab5 11.Nb5+–) 10.c4 (10.Nc3 d6+–) 10...d6 (10...dc4 11.Bc4 a6 12.Nc3+–) 11.Nc3 dc4 12.Bc4 Nbd7 13.Nd4 Ne5 (13...Rc8 14.Qe2+–) 14.Be2 Nh7 (14...Rc8!?+–) 15.f4+– Ng6 16.Bd3 Nf6 (16...Ne7 17.Bh7 Kh7 18.Qc2 Ng6 19.Nc6+–) 17.Bg6 fg6 18.Ne6 Qe7 (18...Qd7 19.Nf8 Kf8 20.Rc1+–) 19.Nf8 Rf8 20.Qc2 Kh7 21.Rac1 Ng4 (21...Qe6 22.f5 gf5 23.Rf5+–) 22.h3 (22.f5 Rf6+–) 22...Nf6 23.Ne2 (better 23.Qa4 Ra8+–) 23...a5 (23...Ne4 24.Qc7 Rf7 25.Qe7 Re7 26.Rfd1+–) 24.Qc7 Qe4 (24...Qc7 25.Rc7 Rb8 26.Rfc1+–) 25.Rf2 g5 (25...Rc8 26.Qb6 Rc1 27.Nc1 Qd5+–) 26.Nc3 (26.Nc3 Nd5 27.Ne4 Nc7 28.Nd6 Nb5 29.Nb5+–) 1–0. GuestGNVN – GuestPZDY, freechess.org, 2020.

4.Be5 Nf6 5.Nf3 d6 6.Bd4+=.

4.Be5 Nf6 5.Nf3 Bf3 6.ef3+/– d6 7.Bf6 Qf6 8.Nc3 Nd7 (8...a6 9.Qe2 Kd8 10.Qe4+/–) 9.Nd5 Qe6 10.Qe2 Qe2 (10...Kd8 11.Nb4+/–) 11.Be2+– 0–0–0 12.0–0 Nf6 (12...Kb7 13.d4+–) 13.Bc4 Nd5 14.Bd5 f6 (14...Rd7 15.Rfe1 Kd8 16.Re3+–) 15.a4 g5 16.a5 Bg7?? (16...Kb8+–) 17.ab6 ab6 (17...a5 18.ba6 cb6+–) 18.Bc6 f5 19.Ra8 1–0. Tiedemann,Joern (2125) – Klawitter,Bernd (1790), RSS7E basic–17, 2009.

4.Be5 Qg5 5.Bc7 Bg2? (better 5...Qb5!? 6.Nc3 Qc5+=) 6.Nf3+– Bf3 7.ef3 Bc5 8.Nc3 Bf2? (8...Qe7 9.Qe2 Nf6+–) 9.Kf2 Qc5 10.Kg2 Qc7 11.Qe2 Ne7 (11...Kd8 12.Qe4 Nc6 13.bc6 Qc6+–) 12.Nd5 Qd6 13.Re1 Qg6 (13...0–0 14.Ne7 Kh8+–) 14.Kf2 Qe6 (14...Qd6 15.Qe7 Qe7 16.Re7 Kd8 17.Rf7+–) 15.Nc7 (15.Nc7 Kd8 16.Ne6 fe6 17.Qe4+–) 1–0. GuestJVKF – GtRube, freechess.org, 2020.

4.Be5 d6

5.Bb2 a6 6.e3+=.

5.Bb2 Nd7 6.d4 Bd5 7.Nc3 (7.e3+–) 7...Ndf6 (7...Bc4!?+–) 8.Nd5+– Nd5 9.e3 Ngf6 (9...a6 10.Nf3+–) 10.Nf3 (better 10.c4 Ne7 11.Bd3+–) 10...Be7? (better 10...Ne7+–) 11.c4 Nb4 (11...Ne3 12.fe3 a6 13.ba6+–) 12.a3 Nd3 (12...Na6 13.ba6 0–0 14.Bd3+–) 13.Bd3 0–0 14.Qc2 (14.0–0 a6+–) 14...g6 (14...a6 15.d5+–) 15.0–0 (15.e4 a6+–) 15...d5 (15...a6 16.e4+–) 16.cd5 Qd5 (16...Nd5 17.Ne5 Nf6 18.Nc6+–) 17.Bc4 (17.Qc7 Bd6 18.Qc6 Rac8 19.Qd5 Nd5+–) 17...Qe4 (17...Qh5 18.Be2+–) 18.Qb3 (better 18.Qe4 Ne4 19.Bd5+–) 18...Nd5 (18...Kg7+–) 19.Bd5 Qg4 20.Ne5 Qf5 21.Bf7 (21.Nf7 Rf7 22.Ba8 Kg7+–) 21...Kg7 (21...Rf7 22.e4 Qf6 23.Rac1+–) 22.d5 (better 22.Be6 Qg5 23.Nd7 Bd6+–) 22...Bd6 23.Ng4 Kf7 24.Nh6 (24.Nh6 Ke8 25.Nf5 gf5 26.Qc2+–) 1–0. DEFFM – GuestXWYH, freechess.org, 2020.

5.Bb2 Nd7 6.d4 Ngf6 7.e3 h6 8.Nf3 Ne4 (8...d5 9.c4+–) 9.Nbd2 d5 10.Be2 (10.Bd3 Nd2 11.Nd2 Bd6+–) 10...Bd6 11.0–0 f5 (11...0–0!?+–) 12.c4+– 0–0 13.Qb3 (13.cd5 Nd2 14.Qd2 Qe7+–) 13...Qf6 (13...a5!?+–) 14.cd5+– Rae8 (14...Qf7 15.Bc4+–) 15.g3 (15.Ne4 fe4 16.Ne5 Ne5 17.de5 Be5 18.d6 Kh8+–) 15...g5 (15...Qf7!?+–) 16.Ne4 fe4 17.Nd2 Qf7 18.Bg4 (18.Nc4!? Bd5 19.Qa4 Rc8+–) 18...Bd5+– 19.Qc2 Rc8 1–0. GuestGFHK – GuestPZGR, freechess.org, 2019.

5.Bb2 Nd7 6.e3 Nc5 7.Nf3 Nf6 8.Be2 Be7 9.c4 0–0 10.Nc3 d5 11.cd5 Nd5 12.Nd5 Bd5 13.d4 Ne4 14.0–0 Nf6 (14...Bd6 15.Qc2+–) 15.Ne5 Nd7 (15...Bd6 16.f3+–) 16.Nc6 Bc6 17.bc6 Nf6 18.Bf3 Nd5 (18...Re8 19.e4+–) 19.Qb3 Nf6 20.e4 h6 21.e5 Nh7 22.Bg4 a5 23.f4 Bb4 (23...Kh8 24.Bf5+–) 24.Bf5 Qh4 (24...Ra7 25.a3 Be7 26.Qd3+–) 25.a3 Be7 26.Qf3 Bd8 27.g3 Qe7 28.a4 Qe8 (28...Qb4 29.Qd3 Re8 30.Bh7 Kh8+–) 29.Bd7 Qe7 (29...Be7 30.Be8 Rfe8 31.f5+–) 30.Ba3 (30.Ba3 Qa3 31.Qa3+–) 1–0. DEFFM – GuestHTGY, freechess.org, 2020.

5.Bb2 Be7?? 6.e3 (6.Bg7 Bf6 7.Bh8 Bh8+–) 6...a6?? (6...Nf6 7.Nf3+/–) 7.a4 (better is 7.Bg7!? Bf6 8.Bh8 Bh8+–) 7...ab5? (7...Bf6 8.d4+/–) 8.Bb5 (better is 8.Bg7!? Bf6 9.Bh8 (9.Bb5?! c6 10.Bh8 Bh8+=) 9...Bh8 10.d4 (10.Bb5 Kf8–/+) 10...ba4 11.c4+–) 8...c6 (8...Nd7 9.Nf3 Ngf6 10.Nd4+/–) 9.Be2 (9.Bg7 Bf6 10.Bh8 Bh8+=) 9...Nf6 10.d4 0–0 11.Nf3 Ba6 12.0–0 h6 (12...Be2 13.Qe2 Nbd7 14.c4+/–) 13.c4+/– Nbd7 14.Nc3 d5 15.cd5 Be2 16.Qe2 cd5 17.Qb5 Ra5 18.Qb3 Qb8 19.Nb5 Ne4 (19...Rc8!?+/–) 20.Qd5+– Ndf6 21.Qb3 Ng4 22.Rad1 Nd6 (22...Qa8 23.h3 Ngf6 24.Nh4+–) 23.Nd6 (23.Bc3 Ra8+–) 23...Bd6 24.g3 (24.h3 Nf6 25.Bc3 Ra7+–) 24...Qb7? (better is 24...b5!? 25.d5 Ra4+–) 25.d5+– Rd8 26.e4 h5 (26...Re8 27.Bc3 Raa8 28.h3+–) 27.h3 Nh6 28.e5 (28.Bc3 Ra6+–) 28...Bb8 29.d6 Kh8 (29...Qd7 30.e6 fe6 31.Ne5 Re5 32.Be5+–) 30.Bd4 Nf5 (30...Ba7+–) 31.Qb6 Qb6 (31...Rd7 32.Qa5 Qf3 33.Qc3 Qc3 34.Bc3+–) 32.Bb6 Rd7 (32...Ra8 33.Bd8 Bd6 34.ed6 Rd8 35.d7+–) 33.Ba5 g6 34.Ra1 Nd4 (34...Kh7 35.Ng5 Kg7 36.Rfb1+–) 35.Nd4 Ba7 36.Nc6 Bc5 37.Rac1 Ba3 38.Rc3 Bb2 39.Rb3 Be5 40.Ne5 1–0. stampyshortlegs – Bandy 1, ChessWorld.net, 2015.

5.Bb2 Nf6 6.e3 Nbd7 7.Nf3 Be7 8.Be2 0–0 9.0–0 c6 (9...a6 10.a4+–) 10.a4 a6 11.bc6 Bc6 12.Nd4 Bg2?? (better 12...Bb7+–) 13.Kg2+– Ne5 14.f4 Ng6 15.Nc6 Qd7 16.Ne7 Qe7 17.Kh1 d5 (17...Nh4 18.Bf6 Qf6 19.Nc3+–) 18.Ba3 Qe4 19.Bf3 Qc4 (19...Qa4 20.Nc3 Qc6 21.Bf8 Kf8 22.Rg1+–) 20.Bf8 Rf8 21.Nc3 d4 22.Qe2 Qe2 23.Ne2 (23.Be2?! dc3 24.Rad1 a5+–) 23...Rd8 (23...de3 24.de3 Rb8 25.Nd4+–) 24.Nd4 Nh4 (24...Nd7 25.Rfb1+–) 25.Rab1 (25.Bb7 Rd6+–) 25...b5 (25...Nf3 26.Nf3 Nd7 27.d4+–) 26.ab5 ab5 27.Rb5 g6 (27...Kf8 28.Bc6+–) 28.c4 h5 (28...Nf3 29.Nf3 Kg7 30.Rb7+–) 29.c5 (better 29.Bc6+–) 29...Ra8 (29...Nf3 30.Rf3 Kf8+–) 30.Ba8 Kg7 1–0. GuestYDSJ – Nerthi, freechess.org, 2020.

3.b5 e6

4.a4 a6 5.c4 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.e3 Be7 9.Nf3 0–0 10.Be2 d5 11.cd5 Nd5 12.0–0 c5 13.d4 Re8 14.dc5 Bc5 15.Bd4 Bd4 (15...Nd7 16.Bc5 Nc5 17.Qd4=) 16.Nd4 (16.Qd4 Nd7=) 16...Qd6 17.Qa4 Nd7 18.Rc1 Nc5 19.Qa7?? (better 19.Qc2=) 19...Ra8–+ 20.Qa8 Ba8 21.Ne6 (21.Nb3–+) 21...fe6 22.Bc4 (22.Rd1 Qe5 23.h3 Qb2–+) 22...Kf8 (better 22...Qe5 23.Rd1–+) 23.Bd5 (23.Rd1 Qe5 24.Be2 Ke7–+) 23...Bd5 (23...Qd5 24.f3–+) 24.Nc3 Nb3 (better 24...Bb3 25.Nb1–+) 25.Rb1 (25.Rd1 Qc5 26.Nd5 ed5–+) 25...Qc5 (better 25...Bc4 26.Rd1 Qb4 27.Na2–+) 26.Nd5 Qd5 27.h3 Qb5 28.Kh2 (28.Rb2 Qd3 29.Kh2 b5–+) 28...Qe5 29.g3 Qd5 30.h4 (30.Kg1 Nd2 31.Rc1 Qf5–+) 30...Nd2 31.Rb6 (31.Rc1 Nf3 32.Kg2 Nh4 33.Kh3 Qf5 34.Kh2 Qf2 35.Kh3 Nf5 36.Rc8 Ke7 37.Rc7 Kf6 38.Rg7 Kg7 39.Kg4 Qg3 40.Kh5 Qg6) 31...Nf3 (better 31...Qf3 32.Kg1 Qd1 33.Kh2–+) 32.Kh3 Qf5 (32...Qd1 33.Rb8 Kf7 34.Kg2–+) 33.g4 (33.Kg2 Qg4–+) 33...Qc5 (33...Qe4 34.Rb8 Ke7 35.Rb4 Qb4 36.Kg3 Qe4 37.Kg2 Nh4 38.Kf1 Qd3 39.Kg1 Qd1 40.Kh2 Qg4 41.f4 Qg2) 34.Re6 (34.Rb8 Kf7 35.Rb7 Kf6–+) 34...Kf7 (better 34...Qd5 35.Kg3 Ne1 36.Kf4 Qe6 37.h5 Qf6 38.Ke4 Qf2 39.Kd4–+) 35.Re4 (35.Ra6 Qc7 36.g5 Ng5 37.hg5 Qc8 38.Kg3 Qa6–+) 35...Ng1 (better 35...g5 36.Rd4 Qe5 37.Kg2 Nh4 38.Kf1 Qb5 39.Ke1 Nf3 40.Kd1 Nd4 41.ed4 Qd3 42.Ke1 Qd4 43.Ke2–+) 36.Kg2 Ne2 37.Kf3 Ng1 (better 37...Qc6 38.Ke2 Qe4 39.g5–+) 38.Kg2 Qd5 39.f3 Qd1 40.Rf4 Ke6 (better 40...Kg8 41.Rf5–+) 41.Re4 Kf7 42.Rf4 Kg8 43.g5 (43.Rf5 h5! 44.gh5 Qc2 45.Kg1 Qf5–+) 43...Ne2 (better 43...Qe2 44.Kg1 Qe3 45.Kg2 Qf4 46.g6–+) 44.Kf2 Nf4 45.ef4 Qd2 46.Kg3 Kf7 (46...g6 47.f5–+) 47.Kg4 (47.f5 Qd6 48.Kg4 h5 49.gh6 Qd4 50.Kg3 Qe5 51.Kf2 Qh2 52.Ke3 gh6–+) 47...Qg2 48.Kf5 Qf3 49.Ke5 Ke7 (better 49...Qe3 50.Kd5 Qf4–+) 50.Kf5 Qd3 (50...Qe2 51.g6 Qe6 52.Kg5 Qg6) 51.Kg4–+ Kf7 (51...Qe2 52.Kg3 Qe3 53.Kg4–+) 52.Kh5 Qe2 0–1. AleksandrNekhoroshik (1650) – budnitskyvladimir (1660), lichess.org, 2020.

4.a4 a6 5.e3 d5 6.Nf3 Nd7 7.c4 (7.Be2 Ngf6=) 7...Ngf6 8.Be2 (8.Nc3 ab5 9.cd5 b4 10.de6 fe6=) 8...Be7 (8...dc4 9.Bc4 ab5 10.ab5 Ra1 11.Ba1=) 9.0–0 0–0 10.d4 ab5 (10...c5 11.Nbd2=) 11.ab5 Ra1 12.Ba1 Qa8 13.Nbd2 dc4 14.Bc4 Bd5 (14...Rc8 15.Bc3=) 15.Be2 (15.Bd5 Qd5 16.Qe2 c6 17.bc6 Qc6=) 15...Ne4 (15...Rc8 16.Qc2=) 16.Ne4 Be4 17.Bb2 Nf6 (17...c5 18.bc6 Qc6 19.Qd2=) 18.Qb3 Qb7 (18...Bd5 19.Qc2=) 19.Rc1 (19.Ra1 Ra8=) 19...Bd6 (19...Ra8 20.Qc4=) 20.Ba3 Rc8 21.Bd6 cd6 22.Rc8 Qc8 23.h3 (23.Qa3 h6=) 23...Nd5 (23...Qc1 24.Qd1 Qd1 25.Bd1–/+) 24.Qa3 (better 24.Ng5 Bc2 25.Qa2=) 24...Qd8 (better 24...Nc3!? 25.Bf1 Qc7=) 25.Nd2+– Bg6 (25...Nf6 26.Nc4 (26.Ne4?! Ne4 27.Bd3 Nf6+=) 26...Ne8 27.Qa6+–) 26.Nc4+– h6 27.Qd6 Qa8 (better 27...Qd6!? 28.Nd6 Kf8+–) 28.Nb6 Qa1 29.Kh2 Nc3 (29...Nb6 30.Qb6 Qb2 31.Qd8 Kh7+–) 30.Bf3 Nb5 (30...Kh7 31.Nd7 Be4 32.Qb8 Bf3 33.Nf8 (33.gf3?! Ne2 34.Nf8 Kh8 35.Ne6 Kh7 36.Nf8 Kg8=) 33...Kh8 34.Ne6 (34.gf3?! Ne2 35.Ne6 Kh7 36.Nf8 Kg8=) 34...Kh7 A) 35.gf3 fe6 36.Qc8 Qb2–/+ (36...Nb5?! 37.Qe6 Qf1 38.Qf5 Kg8 39.Qc8 Kf7 40.Qd7 Kf6 41.Kg3=); B) 35.Nf8 Kg8 36.Ng6 (36.gf3?! Ne2 37.h4 Qg1 38.Kh3 Qf2 39.Nd7 Kh7 40.Nf8 Kg8 41.Ng6 Kh7 42.Nf8 Kg8=) 36...Kh7 37.Ne7+– (worse 37.gf3 fg6 38.Kg2 Qb2=+)) 31.Qd8 Kh7 32.Nd7 Bf5 (32...Qa3 33.Nf8 Kg8 34.Ng6 Kh7 35.Nf8 Kg8 36.Nd7 Kh7 37.Be4 g6 38.Nf6 Kg7 39.Ne8 Kf8+–) 33.Nf8 (33.Nf8 Kg8 34.Ng6 Kh7 35.Ne7 Qa8 36.Qa8 h5 37.Qg8 Kh6 38.Qf7 g6 39.Ng8 Kg5 40.Qf6) 1–0. BeepBeepImAJeep (2780) – EnergyVision (2480), lichess.org, 2019.

4.a4 c5 5.e3 d5 6.c4 a6 (6...Nf6 7.cd5 ed5 8.Nf3=) 7.Nf3 ab5 (7...Nf6 8.cd5 ed5 9.ba6 Ba6 10.Bf6 Qf6 11.Nc3=) 8.ab5 (8.cd5 ed5 9.Bb5 Bc6+=) 8...Ra1 9.Ba1 dc4 (9...Nf6 10.Be2=) 10.Bc4 Bf3 (10...Nf6!?=) 11.Qf3+= Nf6 12.0–0 Be7 (12...Bd6 13.Rc1+=) 13.d4 cd4 14.Bd4 0–0 15.Rd1 Nbd7 (15...Qc7 16.Nd2+=) 16.Nd2 (16.Bf6 Bf6 17.Qc6 Ne5 18.Rd8 Rd8+–) 16...Nd5 (better 16...Bd6!?+=) 17.Bd5+– ed5 18.Qd5 Nf6 (18...Qc7 19.Qc6 Rc8 20.Rc1+–) 19.Qd8 (19.Qc6 Qd5+–) 19...Bd8 (19...Rd8 20.Rb1+–) 20.Nf3 (20.Nc4!? Nd5+–) 20...Ne4 21.Rc1 (21.Ne5 Bc7+–) 21...Re8? (21...Nd6 22.Rc6 Nb5 23.Bb6 Bb6 24.Rb6+–) 22.g3 (22.Rc6!? g5+–) 22...Bf6 (22...Nd6!? 23.Rc6 Nb5 24.Bb6 Kf8+–) 23.Rc6 Bd4 24.Nd4 Rb8 25.Rc7 (25.f3 Nc5+–) 25...Kf8 (25...h5 26.f3 Nc5 27.Rc6+–) 26.Nc6 Re8 (26...Ra8 27.Rb7+–) 27.Rb7 Nd2 (27...Nc5 28.Rb6 Ra8 29.Kg2+–) 28.Rb6 Re6 (28...Rc8 29.Ra6+–) 29.Kg2 (better 29.Rb8 Re8 30.Re8 Ke8 31.b6 Nf3 32.Kg2+–) 29...Rf6 (29...Nc4 30.Ra6+–) 30.f4 (30.Rb8) 30...Ne4 (30...g6+–) 31.Rb8 1–0. BeepBeepImAJeep (2600) – ENGSADI (1670), lichess.org, 2018.

4.a4 c6 5.Na3 c5 6.c4 d6 7.Nc2 Nd7 8.e3 Be7?? (8...Ne5 9.d3=) 9.Nf3?? (better is 9.Bg7 Bf6 10.Bh8 Bh8 11.d4+–) 9...Ngf6 10.d4 0–0 11.Be2 h6 12.0–0 Nh7 13.h3 Bf6 14.Nh2 Ng5 15.Ng4 Ne4 16.Nf6 gf6 17.Bf3 f5 18.dc5 bc5 19.Ne1 Kh7? 20.Nd3 Rg8 21.Nf4 Qg5 22.Kh2 e5 23.Nd5 Ndf6 24.g3?? Nd5–+ 25.cd5 f6 26.Bc1?? Rg7 27.Qe1?? Rag8 28.Rg1 h5 29.Be4 fe4 30.Qd1 f5 31.Bd2 Qf6?? 32.Rg2?? h4 33.Qe2?? hg3 34.fg3 1–0. azme – donstephen, kurnik, 2011.

4.a4 c6 5.h3 Nf6 6.e3 Be7 7.Nf3 0–0 8.Bd3 d5 9.Ng5 h6 10.h4 Nbd7 11.bc6 Bc6 12.Bb5 Qc7 (12...hg5 13.hg5 (13.Bc6?! g4+/–) 13...Bb5 14.gf6 Nf6 15.Bf6+– (15.ab5?! g6+/–)) 13.Bc6 Qc6 14.Nf3 Rac8 15.Nc3 Ng4?? (15...Qc4 16.Nd4–/+) 16.Ba3?? (better is 16.Nd4 Qc7 17.Qg4+–) 16...Ba3–/+ 17.Ra3 Nge5 18.Ne5 Ne5 19.0–0 Nc4 20.Rb3 Nd6 21.f4 Rfd8 22.Rf3 Nc4 23.Rg3 d4 24.ed4 Rd4 25.Qg4 g6 26.h5 Ne5?? 27.Qe2= Nd7 28.hg6 f6 29.Re3 Rf4 30.Re6+/– Qc5 31.Re3 Re8? 32.Rb5+– Re3 33.de3 Qc3 34.ef4 Qd4 (34...Qd4 35.Kh1 Nf8+–). aleksandras19 – taragues, kurnik, 2012.

4.a4 d5 5.e3 Bd6?? (5...Nf6 6.Nf3=) 6.Nf3 (better is 6.Bg7 Be5 7.Be5+–) 6...Nf6= 7.Be2 0–0 8.d4 Nbd7 9.Nbd2 c6 10.0–0 cb5 11.ab5 Rc8 12.Ra7 Rc7 13.c4 dc4 14.Nc4 Be7 (14...Bf3 15.Rc7 Be2 (15...Qc7?! 16.gf3 Bh2 17.Kg2=) 16.Rd7 Bh2 (16...Qd7?! 17.Qe2 Qb5 18.Rc1=) 17.Kh1 Nd7 (worse is 17...Bd1 18.Rd8 Rd8 19.Rd1+=) 18.Qe2 Qh4–+) 15.Nfe5 Ne5 16.Ne5 Nd5 (16...Bg2 17.Rc7 Bf1 18.Ra7 Be2 19.Qe2+/–) 17.Bf3 (17.Qa4 Qb8+/–) 17...Bd6 18.g3 (18.Qb3!?+/–) 18...f6 19.Nc6 Bc6 20.Rc7 Qc7 21.bc6+/– Qc6 22.Qb1 Qb5 23.Bd5 ed5 24.Qa2 Bb4 25.Rb1 Qc4 26.Ra1 Ba5 27.Qa3 Qe2 28.Bc3 Ra8 29.Ba5 Ra5= 30.Qc3 Ra1 31.Qa1 Qb5 32.Qa8 Kf7 33.Qb7 Kg6 34.h4 h5 35.Qb8 Qc6 36.Qf4 b5 37.g4 Qe6 38.gh5 Kh7 39.Qg3 Qf7 40.Qf3 b4 41.e4 Kh6 Attacking the isolated pawn on h5 42.ed5+/– Qb7?? 43.Qf5+– Qf7 44.d6 b3 45.Qb5 b2 46.Qb2 Qh5 (46...Qh5 47.Qc1 Kh7+–). typ48 – gankov, kurnik, 2012.

4.a4 Qe7 5.Ba3 d6 6.d4 Nf6 7.f3 g6 8.e4 Bg7 9.c3 a6 10.Bb4 ab5 11.Bb5 c6 12.Bd3 b5 (12...c5 13.Bb5 Nfd7 14.Ba3+=) 13.a5 (13.e5 Nd5 14.Bd6+/– (worse is 14.ed6 Qg5 15.Qd2 Qd2 16.Kd2 Nb4 17.cb4 Bd4+=)) 13...0–0 14.c4 bc4 15.Bc4 c5 16.dc5? (16.Bc3 d5 17.ed5 ed5 18.Be2 c4–/+) 16...dc5?? (better is 16...Ne4 17.fe4 Qh4 18.Kf1 Qe4–+ (18...Ba1?! 19.Nf3 Qf4 20.cd6–+)) 17.Bc3+= Nc6 18.Ne2 Rad8 19.Qc1 Nd4 20.0–0 Ne2 21.Be2 Ra8 22.a6 Bc8 23.Nd2 Qa7 24.Kh1 Rd8 25.Nc4?? Ba6+= 26.Ne5 Qb7 27.Ba6 Ra6 28.Qb2 Qb2 29.Bb2 Ra1 30.Ra1 Rd2 31.Bc3? Rc2–+ 32.Ba5 Ne4! 33.Bc7 Nf2 34.Kg1 Nd3?? 35.Ra8+/– Bf8 36.Nd3 c4 37.Nb4 Rb2?? 38.Nc6 Kg7?? 39.Be5 f6 40.Bb2 Bc5 41.Kf1 e5 42.Ke1 Kf7 43.Na5 Ke6 44.Nc4 Kd5 45.Nd2 h5 46.Ke2 Bd6 47.h3 g5 48.Rd8 Ke6 49.Rd6! Kd6 50.Ne4 Ke6 51.Nc5 Kd5 52.Nd3 Kc4 53.Nf2 Kb3 54.Bc1 Kc2 55.Be3 Kc3 56.Ne4 Kc4 57.Nf6 h4 58.Ng4 Kd5 59.Bg5 Ke6 60.Bh4 Kf5 61.Bg3 e4 62.fe4 Ke4 63.h4 Kf5 64.Nh2 Kg6 65.Kf3 Kh5 66.Kf4 Kh6 67.Kg4 Kg6 68.Bf4 Kh7 69.h5 Kh8 70.Kg5 Kh7 71.Ng4 Kg7 72.Nf6 Kh8 73.Be5 Kg7 74.Ne8 Kf7 75.Nd6 Ke6 76.Kf4 Ke7 77.h6 Kf8 78.h7 Ke7 79.h8Q Ke6 80.Qf6 Kd7 81.Qf7 Kc6 82.Qc4 Kd7 83.Qc8 Ke7 ½–½. poganinbezdom – enveri (1635), kurnik, 2011.

4.a4 Be7 5.e3 Bf6 6.d4 Ne7 7.c4 d5 8.f4 dc4 9.Nf3 0–0 10.Bc4 c6 11.0–0 c5 12.Ne5 cd4 13.Bd4 Nf5 14.Nc3 Nd7 15.g4 Nh4 16.Nc6 Bd4 17.Nd8 Be3 18.Rf2 Rad8 19.Kf1 Bf2 20.Kf2 Nc5 21.Qc2 Ng2 22.f5 ef5 23.gf5 Nf4 24.Kg3 Rd4 25.Nd1 Rfd8 26.Ne3 Rd2 27.Qc1 Nh5 28.Kg4 Nf6 29.Kg3 Nce4 30.Kf4 R8d4 31.Bf7 Kf7 32.Qc7 Rd7 33.Qc4 Kf8 34.Rg1 Rf2 35.Ke5 Re7 0–1. jura1946 – cuchi53, kurnik, 2012.

4.a4 f5 5.c4 Nf6 6.e3 Bd6 7.Nc3 (7.Nf3 0–0=) 7...0–0 (7...a6 8.a5=+) 8.Nf3 a6 9.d4 (9.Be2 Be7=) 9...ab5 (9...Ne4 10.Be2=) 10.ab5=+ Ra1 11.Qa1 Ne4 (11...Bf3 12.gf3 f4 13.Bd3=) 12.Be2 Bb4 (12...Qf6 13.Qa7 Nc3 14.Bc3=) 13.0–0+= Rf6 (13...Qe7 14.Ne4 Be4 15.Qa7+=) 14.Ne4 fe4 15.Ne5 Rh6 (15...d6 16.Ng4 Rf7 17.Qa4=) 16.Ng4 Rg6 17.h3 h5 (17...Rg5 18.Qa7 Qc8 19.Qa4+=) 18.Nh2 (18.Ne5 Rg5+–) 18...Qg5+= Threatening mate... how? 19.g3 Bd6? (19...Ba5 20.Bc3 Bc3 21.Qa7+–) 20.Kh1 (20.Qa7 c6 21.Qb7 Bg3+–) 20...c6? (20...Qd8 21.Bh5 Rg5 22.Bg4+–) 21.h4 (21.Qa7 Bc8 22.Qb6 Kh7+–) 21...Qe7? (21...Qd8 22.Qa7 Qc8 23.Qb6+–) 22.Bh5 (better 22.Qa7!? cb5 23.Qb7 bc4 24.Qe4 Rh6+–) 22...Rf6 (22...Rh6 23.Be2 Qd8 24.Qa7+–) 23.d5 (23.Qa7 Qf8 24.Qb7 Rf2 25.Rf2 Qf2 26.Qc8 Kh7=) 23...e5? (23...Rh6 24.Be2 cb5 25.Qa7+–) 24.dc6?? (better 24.Qa7 Bc8 25.Qb6+–) 24...dc6+= 25.Bg4 cb5 26.cb5 Nd7 27.Bd7 Qd7 28.Be5 Rh6? (28...Be5!? 29.Qe5 Rf5 30.Qb8 Kh7+=) 29.Bd6 (29.Rd1 Qe7 30.Ng4 Rg6+–) 29...Qd6 (29...Rd6 30.Qa7+–) 30.Kg2 (30.Rd1 Qe6+–) 30...Rf6 (30...Bd5 31.Rc1+–) 31.Qd4 (31.Rd1 Qf8 32.Rd2 Qe8+–) 31...Qe6 32.Qd8 (32.Rd1 Qf5 33.Qd8 Kh7+=) 32...Kh7 (32...Rf8 33.Qc7 Bd5 34.Rc1+–) 33.Qc7 (33.g4 Qe5 34.g5 Re6+–) 33...Bc8 34.Kg1 (34.Qc2 Bd7+–) 34...Qh3 (34...Bd7!?+=) 35.Qe5 (better 35.Rc1 Bd7 36.Qc2+–) 35...Re6? (35...Qf5!? 36.Qf5 Rf5+–) 36.Qh5 (36.Qd5!? Rf6 37.Qe4 Bf5+–) 36...Rh6 37.Qg5 (37.Qd5 Qe6 38.Rd1 Qg6+–) 37...Rg6+– 38.Qh5 (38.Qd8+–) 38...Rh6+– 39.Qe5?? (39.Qd5 Qe6 40.Rd1 Qg6+–) 39...Re6 40.Qf4 (better 40.Qd5 Rf6 41.Qe4 Bf5+–) 40...Rh6? (40...Bb7 41.Rd1 Rf6 42.Qg4 Qg4 43.Ng4+–) 41.Rd1 (better 41.Qe4 Qf5 42.Qf5 Bf5 43.Rd1+–) 41...Qd7?? (better 41...Qe6+–) 42.Rd7 Bd7 43.Qe4 Bf5 44.Qf4 (44.Qf5 Kg8 45.Nf3 Rf6 46.Qd5 Kh7 47.Qh5 Kg8 48.Ng5 Kf8 49.Qh8 Ke7 50.Qg7 Kd6 51.Qf6 Kc5 52.h5 Kb5 53.h6 Ka6 54.h7 Ka5 55.h8Q b5 56.Qc3 b4 57.Qa8 Kb5 58.Qcc6) 44...Bg6 (44...Rf6 45.Nf3 Kg8 46.Qb8 Rf8 47.Qb6+–) 45.Nf3 Rh5 46.Ng5 Rg5 47.Qg5 Bf7 48.h5 Kg8 49.h6 g6 (49...Kf8 50.h7 Bg8 51.h8Q Kf7 52.Qhg7 Ke6 53.Q7e7) 50.Qf6 (50.Qd8 Kh7 51.Qf8 Bd5 52.Qg7) 50...Kh7 (50...Kf8 51.h7 Ke8 52.h8Q Bg8 53.Qg8 Kd7 54.Qgd8) 51.Qg7 1–0. BeepBeepImAJeep (2580) – Arunachala (2295), lichess.org, 2019.

4.a4 f5 5.e3 Nf6 6.c4 Bb4 7.Nf3 Qe7 8.Be2 d5 (8...0–0 9.0–0=) 9.0–0 dc4 (9...a6 10.Nc3=) 10.Bc4+= Nbd7 11.Be2 (11.Nd4 Nc5+=) 11...0–0–0 (11...c5 12.d4=) 12.Nd4 Rhf8 (12...Kb8 13.Bc3+–) 13.Bf3 (13.a5 ba5 14.d3 Nc5+–) 13...Ne4 (13...Bf3 14.Qf3 Ne5 15.Qe2+–) 14.Nc3 (14.d3 Ndc5 15.de4 e5 16.ef5 ed4 17.Bb7 Kb7 18.Qf3 Ne4 19.ed4 g6+–) 14...e5 (14...Ndc5+=) 15.Nc6?? (better 15.Nf5 Rf5 16.Be4 (worse 16.Ne4 Nc5+=) 16...Bc3 17.Bb7 Kb7 18.Bc3+–) 15...Bc6=+ 16.bc6 Ndc5 (16...Bc3 17.Bc3 Nc3 18.dc3=+) 17.Ne4 (17.Be4 Ne4 18.Ne4 fe4 19.a5 Rd2 20.Qg4 Kb8 21.Bc1+–) 17...fe4=+ 18.Be2? (better 18.Bg4 Kb8 19.Ba3 Ba3 20.Ra3=+) 18...Nd3?? (better 18...Rd2 19.Bg4 Kb8–+) 19.Qb3 (19.Bd3 Rd3 20.Qg4 Kb8+–) 19...Bd2 (19...Nb2 20.Qb2 Rd2 21.Ba6 Kb8 22.Qb3=) 20.Rfd1 (20.Qb5 Nc5 21.Ba3 Kb8+–) 20...Ba5?? (better 20...Rf2 21.Rd2 Qg5 22.Qe6 Kb8–/+) 21.Bd3+– ed3 22.Rd3 (22.Qb5 Rd6 23.Be5 d2 24.Bd6 Qd6+–) 22...Rd3 (22...e4!? 23.Rd8 Rd8+–) 23.Qd3+– e4?? (better 23...Bb4+–) 24.Qb3 (better 24.Qa6 Kd8 25.Rd1 Ke8 26.Rd7 Qd7 27.cd7 Kd7 28.Bg7+–) 24...Qd6 (24...Qf7 25.Qc2 Qe6 26.Rd1+=) 25.Ba3 (25.Bg7 Rd8 26.Qb5 Kb8+–) 25...Qf6+= Threatening mate... how? 26.Ra2 (26.Rf1!? Re8 27.Qb5+–) 26...Re8 (26...Rd8 27.h3 Qc6 28.Bb2–/+) 27.g3 (27.Qc4!? Qc3 28.Qa6 Kd8 29.h3 Qc6 30.Ra1+=) 27...Qc6–/+ 28.Qf7 (28.Rc2 Qd7–/+) 28...Qd7 29.Qd7 (29.Qb3 Qe6 30.Qb5 Rd8–/+ (30...Qa2?! 31.Qe8 Kb7 32.Qe4 Kb8 33.Be7=)) 29...Kd7–+ 30.Rc2 c5 31.Bb2 g6 32.Bf6 (32.g4 Kd6–+) 32...Kc6 33.Bg5 (33.g4 a6–+) 33...Re6 (33...a6 34.Kg2–+) 34.Bf4 (34.Kg2 a6–+) 34...Re7 (34...Kd5 35.Kg2–+) 35.Kg2 Rd7 36.Rc1 (36.f3–+) 36...Rd2 37.Rc5?? (37.h4–+) 37...bc5 38.h4 (38.g4 c4–+) 38...Bc3 (better 38...c4 39.Be5–+) 39.g4 (39.g4 Ra2 40.h5–+). RichardSommer (2140) – MarcSimborio78 (2195), lichess.org, 2020.

4.a4 f5 5.e3 Nf6 6.c4 Qe7 7.Nf3= Rg8 (7...a6 8.Be2=) 8.Be2+= g5 9.0–0 g4 10.Nd4 a6 11.f3 (11.a5 ba5 12.Ra5 Rg5+=) 11...ab5 (11...c5 12.bc6 Nc6 13.Nc6 Bc6 14.Bd4=) 12.ab5+= Ra1 13.Ba1 gf3 14.Bf3 c6? (14...Bf3 15.Qf3 Bg7 16.Qb7+=) 15.Nc3 (15.Qa4!? Qd6 16.Qa7+–) 15...Qg7 (15...Ng4 16.bc6 Nc6 17.Ndb5=) 16.Na4 Bc5 (16...cb5 17.Bb7 ba4 18.Qa4 Ne4 19.Be4 fe4+–) 17.Nc5 bc5 18.Nb3 d6 19.bc6 (better 19.Na5 e5 20.Qb1+–) 19...Bc6+= 20.d4 (20.Bc6 Nc6 21.Qf3 Nd8+–) 20...cd4 (20...Qg2! 21.Bg2 Rg2 22.Kh1 Rd2 23.Kg1 Rg2 24.Kh1 Rd2 25.d5 Rd1 26.Rd1 Nd5 27.cd5 Bd5 28.Rd5 ed5=) 21.Nd4+= (21.Bd4? Qg2 22.Bg2 Rg2 23.Kh1 Rg3 24.Rf3 Bf3 25.Qf3 Rf3–+) 21...Bf3 22.Qf3 Ne4? (better 22...Qh6 23.Nf5 ef5 24.Qf5 Qe3 25.Kh1 Nbd7 26.Bf6 Qe2+=) 23.Ne6 (better 23.Nf5 Qg2 24.Qg2 Rg2 25.Kg2 ef5 26.Rf5+–) 23...Qe7?? (23...Qg4 24.Ng7 Kd7 25.Qf5 Qf5 26.Rf5 Na6+–) 24.Nf4 (better 24.Qf5 Nc6 25.Qe4+–) 24...Nc6? (24...Nd2 25.Qh5 Qf7 26.Rd1 Nc4 27.Rc1+–) 25.Qh5 (better 25.Nd5 Qg5 26.Nf6 Nf6 27.Bf6 Qf6 28.Qc6 Ke7 29.Qb7 Ke8 30.Qb5 Ke7 31.Rf5 (worse 31.Qf5 Qf5 32.Rf5 Ke6+–) 31...Qa1 32.Rf1+–) 25...Kd7?? (better 25...Qf7+–) 26.Nd5 (better 26.Qf5 Kd8 27.Nd5 Qg5 28.Qe4 Qg6 29.Qh4 Kc8 30.Qh3 Kb8+–) 26...Qf8 (26...Qg5 27.Qh7 Ne7+–) 27.Qf5 (better 27.Rf5 Rg2 28.Kg2 Qg8 29.Kf3+–) 27...Qf5 28.Rf5 (28.Rf5 Rb8 29.Rf1+–) 1–0. RichardSommer (2140) – AudioFile (2175), lichess.org, 2020.

4.a4 h5 5.Nf3 Be7 (5...Nf6 6.e3=) 6.e3 (6.Bg7!? Rh7 7.Bc3+/–) 6...Bf6 7.Be2?? (better is 7.d4+=) 7...Bb2–+ 8.Ra2 Bf6 9.d4 g5 10.h3 (10.0–0 g4 11.Ne5 Be5 12.de5 a6–+) 10...g4 11.hg4 hg4 12.Rh8 Bh8 13.Ne5 Be5 14.de5 Qg5 15.Bg4 Qe5 16.f4 (16.Bf3 Bf3 17.Qf3–+) 16...Qe3 17.Qe2 Qe2 (17...Qf4 18.Bf3 Qc1 19.Qd1 Qe3 20.Kf1–+) 18.Ke2 f5 (18...a6!? 19.Ra3 ab5 20.ab5 Ra3 21.Na3 Bg2 22.Nc4–+) 19.Bf3 Bf3 20.Kf3 d6 21.Nd2 Nd7 22.Nc4 White prepares a5 (22.a5 ba5 23.Nb3 e5–+) 22...0–0–0 (better is 22...a6!? 23.Rb2–+) 23.a5 Kb8 24.ab6 Nb6 25.Na5 Ne7 26.c4 Rh8 27.Ke3 Rh2 28.Kf2 Rh1 29.g4 (29.Re2 Rh6 30.Rd2–+) 29...Rh2 30.Kg3 Ra2 (30...Ra2 31.Nc6 Nc6–+) 0–1. poganinbezdom (1655) – dziadekaxel (1705), kurnik, 2012.

4.a4 Nh6 5.e3 Nf5 6.f4 Be7 7.Nf3 Bf6 8.c3 Bf3 9.Qf3 c6 10.e4 Nh4 11.Qg4 h5 12.Qd1 Qc7 13.g3 Ng6 14.e5 Be7 15.d4 cb5 16.ab5 d6 17.Bg2 de5 18.Ba8 ef4 19.Qf3 fg3 20.hg3 h4 21.g4 Bd6 22.Nd2 0–0 23.0–0–0 Nd7 24.Be4 Bf4 25.Kc2 e5 26.Bg6 fg6 27.Qd5 Rf7 28.Ne4 ed4 29.Ng5 Bg5 30.Rhf1 Nf6 31.Rd4 Nd5 32.Rd5 Qh2 33.Kb3 Rf1 34.Rg5 Rb1 0–1. jura1946 – alin1377, kurnik, 2012.

4.c4 a5 5.e3 c5 6.Nf3 Nf6 7.Be2 Be7 8.0–0 d6 9.d3 Nbd7 10.Nbd2 Qc7 11.e4 0–0 12.h3 h6 13.Nh2 d5 14.ed5 ed5 15.Bf3 d4 16.Ng4 Ng4 17.hg4 Bf3 18.Nf3 Qf4 19.Nh2 Qd6 20.Bc1 Kh7 21.Qe2 Rae8 22.Qe4 g6 23.Bf4 Qe6 24.Rae1 Qe4 25.Re4 Nf6 26.Re2 Nd7?? (better is 26...Bd8 27.Rfe1 Re2 28.Re2 Re8=) 27.Rfe1+– (27.Rfe1 Bg5 28.Re8 Bf4 29.R8e7+–) 1–0. typ48 (1605) – wojtis1970, kurnik, 2012.

4.c4 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.e3 cb5 9.cb5 Bc5?? 10.Bg7+– Nf6 (10...Bg2 11.Bg2 (11.Bh8?! Bh1 12.Qg4 Ne7+=) 11...Qg5 12.Bh8 Qg2 13.Qf3 Qf3 14.Nf3+–) 11.Bh8 Ke7 (11...d6 12.Qa4 Nd5 13.Nf3+–) 12.Bf6 Kf6 13.Qh5 Kg7 14.Qg4 Kf8 15.Nf3 d5 (15...Qf6 16.d4 Qg6 17.Qg6 (17.dc5 Qg4 18.cb6 Bf3 19.gf3 Qf3=+) 17...Bb4 18.Ke2 hg6 19.h4+–) 16.Be2 (16.Qf4 Bd6 17.Qh6 Ke8 18.Qh7 Nd7+–) 16...Nd7 17.0–0 Nf6 (17...Bd6 18.Rc1+–) 18.Qh4 Qe7 19.Nc3 1–0. AleksandrNekhoroshik (1765) – Daniiparedes (1795), lichess.org, 2020.

4.c4 d5 5.d3 (5.cd5!? ed5 6.Nf3=) 5...dc4+= 6.dc4 Qd1 7.Kd1 Nd7 8.Nf3 0–0–0 9.Ke1 Bb4 (9...Nc5 10.Nc3+=) 10.Bc3= Bc3 11.Nc3 Ngf6 12.e3 Ne4 (12...c5 13.Be2=) 13.Ne4 Be4 14.Ng5 Bg6 15.h4 h6 16.Nh3 (16.Nf3 Be4=) 16...Nc5 17.Nf4 Nd3 (17...Bc2 18.Nh5=) 18.Bd3 Bd3 19.Nd3 Rd3 20.Ke2 Rhd8 21.Rhd1 Rd1 22.Rd1 Rd1 23.Kd1 Kd7 24.Kd2 Kd6 25.Kd3 Kc5 26.Kc3 e5 27.f4 e4? 28.g4+– f6 29.h5 c6 30.bc6 Kc6 31.Kd4 b5 32.cb5 Kb5 33.Ke4 Kb4 34.Kf5 Ka3 35.g5 fg5 36.fg5 Ka2 37.gh6 gh6 38.e4 Kb3 39.e5 a5 40.e6 a4 41.e7 a3 42.e8Q a2 43.Qb5 (43.Qb5 Kc2 44.Qe2 Kb1 45.Qe4 Kb2 46.Qb4 Kc1 47.Qc3 Kb1 48.Kg6+–) 1–0. popovicigelu – adam2405, kurnik, 2011.

4.c4 f5 5.e3 Qg5 6.Nf3 Qh5 7.Be2 g5 8.Bh8 g4 9.Ng1 Bg2 10.Bf3 Bh1 11.Bh1 Qh2 12.Ba8 Qg1 13.Ke2 Qh2 14.Nc3 d6 15.Qh1 Qh1 16.Rh1 Nh6 17.Bf6 Kf7 18.Bg5 Ng8 19.Rh7 Kg6 20.Rh8 Kg7 21.Rh1 Kg6 22.Bh4 Nd7 23.Bc6 Ne5 24.d3 Bg7 25.Be8 Kh7 26.Bf6 Nh6 27.Bg7 Kg7 28.f4 Nf3 29.a4 a5 30.ba6 c5 31.a7 1–0. chybol3 – doca30, kurnik, 2012.

4.c4 f6 5.e3 Ne7 6.Nf3 d5 7.d4 dc4 8.Bc4 Nd7 (8...Qd7 9.0–0+=) 9.0–0 (9.Be6!? a6+–) 9...Bd5 10.Qb3 a6 11.a4 a5 (better is 11...ab5!? 12.ab5 Ra1 13.Ba1 Qa8+/–) 12.Nc3 Bf3 (12...Bc4 13.Qc4 Kf7 14.d5 Nd5 15.Nd5 ed5 16.Qd5 Ke8 17.Rfd1+–) 13.gf3 Nd5 (13...Nf5 14.Be6 Nh6 15.Bd5+–) 14.Bd5 (better is 14.Nd5 ed5 15.Bd5+–) 14...ed5 15.Qd5 Rb8 16.Ne4 Qe7 (16...Rc8 17.Rac1 Bb4 18.Rc6+–) 17.Ba3 (17.Rfc1 Rc8+–) 17...Qf7 18.Qc6 Ba3 19.Ra3 0–0 20.Qc7 Rbc8 21.Qg3 Qe7 22.Qd6 Qf7 23.Raa1 Rcd8 24.Rac1 Ne5 25.Qb6 Nf3 26.Kg2 Nh4 27.Kh1 Qd5 28.f3 Nf3 29.Rf3 Qe4+/– 30.Rcf1 Rc8+= 31.Qa5?? Rc4?? 32.Kg1 h6? 33.b6 Rfc8 34.Qf5 Qf5 35.Rf5 Ra4 36.b7 Rb8 37.Rb5 Ra7 38.Rfb1 Ra3? 39.Kf2 Ra2 40.Kg3 Ra3 41.R1b3 Ra1 42.d5 Rd1 43.Rc3 Kf7 44.Rc8 Rb7 45.Rb7 Kg6 46.e4 Re1 47.Kf3 Rf1 48.Kg2 Re1 49.Re8 Re2 50.Kg3 Re3 51.Kf4 Re2 52.Ree7 Rh2 53.Rg7 Kh5 54.d6 Rf2 55.Ke3 Rf1 56.d7 Rd1 57.Rb8 Kh4 58.d8Q Rd8 59.Rd8 h5 60.Rd1 Kh3 61.Rh1# 1–0. popovicigelu – bisha66, kurnik, 2011.

4.d3 Nf6 5.e4 d6 6.Nf3 Be7 7.Be2 Nbd7 8.0–0 0–0 9.Nbd2 c5 10.bc6 Bc6 11.Nd4 Bb7 12.f3 Qc7 13.c4 d5 14.cd5 ed5 15.Rc1 Qb8 16.Nf5 Bb4 17.Nb3 de4 18.de4 Rc8 19.a3 Bf8 20.Nbd4 Rc1 21.Bc1 Qe5 22.Nc2 Nc5 23.Nce3 g6 24.Ng3 (24.Nc4!? Qe6 25.Nd4+=) 24...Be7 25.Qc2 Rc8 26.Bb2 Qd6 (26...Qg5 27.Nc4+=) 27.Rd1 Qc6 (27...Nce4 28.Qb3 Nd2 29.Qb4 Nf3 30.Bf3 Qd1 31.Bd1 Bb4 32.ab4+=) 28.Qb1 Rd8 29.Rd8 Bd8 30.Bd4 Bc7 31.Ngf1 Ne6?? (31...Nfd7 32.Nd5 Qd6 33.Qa2+=) 32.Bf6?? Nf4+= 33.Qb2 Ne2 34.Kh1 Nf4 35.Bh8 Ne6 36.Nd5 Kf8 37.Bf6 Qb5?? 38.Be7+– Kg8 39.Qb5 a6 40.Nc7 Kg7 41.Ne6 Kh6 42.Qb6 Bc8 43.Ng5 Be6 44.Nf7! Bf7 45.Qf6 a5 46.g4 a4 47.h4 (47.h4 Be6 48.Bf8; 47.Bf8) 1–0. poganinbezdom – maxiluzik, kurnik, 2011.

4.d4 d5 5.c4 dc4 6.Nc3 Bb4 7.Nf3 Bc3 8.Bc3 Bd5 (8...a6 9.ba6 Ra6 10.Nd2+=) 9.Qc2 Qd7 (9...f5 10.Ne5=) 10.a4 (10.e4 Qb5 11.a4 Qc6 12.ed5 ed5+/–) 10...c6? (better is 10...Bf3 11.ef3 Nf6=) 11.e4+– cb5 12.ed5 ed5 13.Ne5 Qe6 14.Be2 f6 15.Nf3 ba4 16.Ra4 Nc6 17.0–0 b5 18.Ra6 Qd7 19.Re1 Nge7 20.Rb1 Rb8 21.Bb4 Nb4 22.Rb4 0–0 23.Qb2 Rfe8 24.Ne1?? Nc6–+ 25.Rb5 Rb5 26.Qb5 Re2 27.Kf1 Qe7?? 28.Ra1? Nd4?? 29.Qb8?? Qe8–+ 30.Qa7 Nb3 31.Rd1 Nd2 32.Kg1 Re1 (32...Re1 33.Re1 Qe1#) 0–1. iczker – imperium5, kurnik, 2012.

4.d4 d5 5.c4 dc4 6.Nc3 Nf6 7.Nf3 Bb4 8.e3 Nbd7 9.Bc4 Qe7 10.a4 Ba5 11.0–0 g5 (11...c5 12.Qe2+=) 12.h3 g4 13.hg4 Ng4 14.Ne1?? (better is 14.Rc1+=) 14...0–0–0 (better is 14...Qh4 15.Qg4 Qg4–+) 15.Qg4+– Rhg8 16.Qf4?? (better is 16.Qh5+–) 16...e5?? 17.de5 Ne5 18.Be2 Rd2+= 19.Ba3 Qe6 20.Ne4 Re2 21.Ng5 Qg6 22.Nef3?? Nf3–+ 23.gf3 Qg5 24.Qg5 Rg5 25.Kh2 Bf3 26.Rg1 Rf2 27.Kh3 Rg1 28.Rg1 Ra2 29.Rg8 Kb7 30.Bc1 Ra4 31.Rg7 Bd5 32.e4 Re4 33.Rh7 Rb4 34.Bd2 Rb5 35.Ba5 Ra5 36.Kg4 Be6 37.Kf4 Rd5 38.Ke4 a5 39.Ke3 a4 40.Rh2 b5 41.Rb2 Kb6 42.Ke4 c5 43.Rg2 b4 44.Ke3 a3 45.Ra2 Kb5 46.Ra3 ba3 (46...ba3 47.Kf3 c4 48.Ke3 c3 49.Kf4 c2 50.Ke3 c1Q 51.Ke4 Qe1 52.Kf3 Bh3 53.Kf4 Rf5#) 0–1. iczker – televizori, kurnik, 2011.

4.d4 Ne7 5.c4 Ng6 6.Nc3 Nh4 7.Nf3 Bd6 8.e4 0–0 9.e5 Nf3 10.gf3 Bb4 11.Qb3 Bc3 12.Bc3 Bf3 13.Rg1 Qh4 14.Bb4 (14.Bb2 Qe4 15.Kd2 f6+=) 14...Qe4 (better is 14...Qd4 15.Qc3 Qe4 16.Kd2 c5 17.bc6 Rc8–/+ (worse is 17...dc6 18.Bf8 Kf8 19.Re1+=)) 15.Kd2?? (better is 15.Qe3 Qe3 16.fe3=) 15...Qd4–+ 16.Kc2 (16.Bd3 c5 17.bc6 Rc8–+) 16...Qa1 17.Bf8 Kf8 18.Qf3 Qa2 19.Kd1 c6 20.Rg7?? Kg7 21.Qf6= Kf8 22.Qd8 Kg7 23.Qf6 Kg8 24.Qg5 Kf8 25.Qd8 Kg7 26.Qf6 ½–½. iczker – moop, kurnik, 2011.

4.d4 Ne7 5.Nf3 h6 6.c4 c6 7.Nc3 cb5 8.Nb5 Ng6 9.a4 a6 10.Nc3 Qc7 11.e3 Bb4 12.Qb3 Bc3 13.Bc3 Nc6 (13...Bf3!? 14.gf3 Nh4=) 14.Bd3 Nge7? (14...Nce7 15.d5 ed5 16.a5 ba5 17.c5+=) 15.0–0 a5 16.Be4 (16.e4 f5 17.ef5 Nb4 18.Bb4 ab4+–) 16...d5 17.cd5 ed5 18.Bd3 Rd8 19.Bb5 0–0 20.Rac1 Na7? (better is 20...Rfe8+/–) 21.Ba5! Qd6 22.Bb4 Qf6 23.Ne5 Nb5 24.ab5 Rc8 25.Be7 Qe7 26.Nc6 Bc6 27.Rc6 Qb7 28.Rfc1 Rc6 29.Rc6 Rd8 30.g3 g6 31.Qb4 Kg7 32.Rd6 Ra8 33.Qb3 Ra5 34.Qd5 Qe7?! 35.Qe5 Qe5+/– 36.de5 Rb5 37.f4 Kf8 38.Kf2 Ke7 39.Kf3 Rb2 40.h4 Rb3 41.g4+– Rb4 42.Rd4 Rb5 43.Ke4 White plans f5 43...Rb3 44.f5 Rb5 45.f6 Ke8 46.g5 h5 47.Rd5?? Rb4+/– 48.Rd4 Rb5 49.Rd6 Rb4 50.Kf3 Rh4 51.e6 fe6 52.Re6 Kf8 53.Rb6 Rc4 54.e4 Rc3 55.Kf4 h4 56.Ke5 h3 57.Ke6 Rc8 58.Rb2 Rc6 59.Kd5 Rc8? 60.Rb7 Rd8 61.Ke6?? Re8+= 62.Kd6 h2?? 63.Rh7+– Kg8? 64.Rg7 Kh8+= 65.Re7?? Rf8 66.Rg7 (66.Rg7 h1Q 67.Re7 Qd1 68.Ke5–+) 1–0. iczker – granota, kurnik, 2011.

4.d4 Nf6 5.c4 a5 6.a4 Bb4 7.Bc3 Qe7 8.Nf3 Ne4 9.Qb3 Nc3 10.Nc3 c5 11.e3? (11.bc6!? Nc6 12.Rd1=) 11...cd4 12.Nd4 0–0 13.f3 d5 14.Bd3 e5 15.Nf5 (better is 15.Nc2!? Qh4 16.g3 Bc3 17.Qc3+=) 15...Qf6–+ 16.e4? (better is 16.0–0 dc4 17.Qc4–+) 16...d4 17.0–0 Bc3 18.Ra2 Nd7 19.g4 Nc5 20.Qc2 g6 21.Ng3 Kh8 22.Kg2 Rg8 23.Ne2 h5 24.Nc3 Qh4 25.Ne2? hg4–+ 26.fg4 Qg4 27.Ng3 f5 28.Re1 f4 29.Be2 Qg5 30.h4 Qh4 31.Nf1?? Be4 32.Bf3 Bc2 (32...Bc2 33.Re5 Bb3–+) 0–1. iczker – task55, kurnik, 2011.

4.d4 Nf6 5.c4 d5 6.Nc3 dc4 7.Nf3 Bb4 8.Qa4 Bc3 9.Bc3 Bd5 10.Ne5 Nbd7 11.Nc6 Qc8 12.Qa3 a5 13.Qe7 1–0. iczker – mrcorleone, kurnik, 2012.

4.f3 d5 5.g3 (5.e3 a6=) 5...Nf6 6.Bg2 Be7 7.e3 0–0 8.Ne2 a6 9.ba6 Na6 10.0–0 Bd6 11.f4 Rb8 (11...Qe7 12.Nbc3+=) 12.Nbc3 c5 (12...Bc5 13.Nd4+=) 13.Nb5= Nc7 (13...Be7 14.d3=) 14.Nd6 Qd6 15.Be5 Qd7 (15...Qd8 16.f5=) 16.Rb1 Ba8 17.d3 (17.Bf6!? gf6 18.Nc3+=) 17...Ng4= 18.Qd2 Ne5 19.fe5 Qd8 20.c4 (better is 20.d4!?=) 20...Qg5 (20...dc4 21.d4–+) 21.cd5 Bd5 22.Bd5 Nd5–/+ 23.Nf4 Qe5 24.Nd5 ed5 25.d4 Qe7 26.Rfe1 Rfe8 27.a4 Qa7 28.dc5+= bc5 29.Rb8 Rb8 30.Qd5 Qa4 31.Qc5 h6 32.Rf1 Qa2 33.Qe7 Rb1?? 34.Qf7 Qf7–+ 35.Rb1 Qf3 36.Rb8 Kh7 37.Re8 g5 38.e4 Kg6 39.e5 Kf7 40.Rh8 Qe3 41.Kg2 Qe5 42.Rh6 g4 43.h4 Qd6 44.Rd6+– Ke7 45.Ra6 (45.Ra6 Kf7 46.h5+–) 1–0. MasterofDisaster – OUST, Live Game Caissa's Web, 2004.

4.f3 Qe7 5.e4 f6 6.a4 g5 (6...a6 7.Nc3=) 7.d4 Bg7 8.Nd2 Nh6 9.c4 0–0 10.Bd3 a6 11.Ne2 ab5 (11...f5 12.0–0+=) 12.ab5+/– Ra1 13.Qa1 c6 (13...Qd8 14.Qa7 Qc8 15.0–0+/–) 14.0–0 (14.Qa7 d6 15.Qb6 Nf7+–) 14...cb5 (14...d6!?+/–) 15.cb5+– d5 (better is 15...f5+–) 16.Ba3 Qe8 (16...Qd8 17.Bf8 Bf8+–) 17.Bf8 Qf8 (17...Bf8 18.Qa7 Bb4 19.Nb3 (worse is 19.Qb6 Bd2 20.Qb7 de4+–) 19...de4 20.fe4 Be4 21.Be4+–) 18.Qa7 de4 19.fe4 (19.Qb7?! ed3 20.Nc1 Qd6+–) 19...Be4 20.Ne4 Nf5 (20...Qd8 21.Rc1 Nf5 22.Rc7+–) 21.g4 Ne3 22.Ng5! Nf1 23.Ne6 Qf7 24.Qb8 Bf8+– 25.Nf8 Qf8 26.Qf8 Kf8 27.Kf1 Ke7 28.h4 1–0. poganinbezdom (1630) – picus52, kurnik, 2012.

4.Nf3 (--> 3.Nf3 e6 4.b5).

4.a4 Nf6

5.Na3 Bb4 6.c4 Ne4 7.Nf3 Nc5 (7...0–0 8.e3+=) 8.e3 (8.Bg7 Rg8 9.Bd4 Be4+=) 8...a6 (8...0–0 9.Be2=) 9.Be2 (9.Bg7 Rg8 10.Bb2 Qe7+=) 9...ab5 10.ab5 (worse is 10.Bg7 Rg8 11.Bd4 Rg2+= (11...Ra4?! 12.Nb5 Ra1 13.Qa1=)) 10...Na4 11.Bg7 Rg8 12.Be5 Rg2 13.Bg3 Be4 (13...Nb2 14.Qb3 Ba3 15.Ra3 Ra3 16.Qa3 Nc4 17.Qc3+–) 14.Kf1+= Rg3 15.hg3 Qe7? (15...Qf6 16.Kg2 Nb2 17.Qb3=) 16.Qb3?? (better is 16.Nc2 Ra5 17.Ra2+–) 16...c5?? (16...Qf6 17.Nc2 Nc5 18.Qb4 Ra1 19.Na1 Bf3 20.Bf3 Nd3+/–) 17.Kg2 d6? 18.Nc2 Bc2 19.Qc2 Ra5 20.Ra4 Nd7 21.Ra5 ba5 22.Rh7 Nf6 23.Rh8 Kd7 24.Qa4 Kc7 25.Ra8 Kb7 26.Ra5 Ba5 27.Qa5 Nd7 28.Qa6 Kb8 29.b6 Qd8 30.Qa7 Kc8 31.b7 Kc7 32.b8Q Kc6 1–0. poganinbezdom – hardstyleshe, kurnik, 2012.

5.c4 Bb4 6.e3 d5 7.Qb3 Bc5 8.d4 dc4 9.Bc4? (9.Qc4 Bd6+=) 9...Bd6?? (better is 9...Bg2 10.dc5 bc5–+) 10.Bf1 (10.Nf3 Bf3 11.gf3 0–0=) 10...c6 11.Nf3 cb5 12.ab5 Bd5 13.Qd1 Qc7 14.Nbd2 Ne4 15.Ne5 0–0 16.Rc1= Qe7 17.f3 Nd2 18.Qd2= Rd8 19.Be2 Bb4 20.Bc3= Bc3 21.Rc3 Nd7 22.Nd7 Qd7 23.0–0 Rac8 24.Rfc1 Rc3 25.Rc3 Rc8 26.Qc2 Rc3 27.Qc3 g6 28.e4 Bb7 29.Bc4 Qc7 30.Qd3 Qf4 31.d5 Qc1 32.Kf2 ed5 33.ed5 Qb2 34.Kg3 Qe5 35.f4 Qd6 36.Qe4 Kf8 37.Qe5+/– Qa3 38.Kh4 Qb4?? 39.Qe2 Qe7= 40.Qe7 Ke7 41.Kg5 Kd6 42.Kf6 Bd5 43.Bd5 Kd5 44.Kf7 Kc5 45.Kg7 Kb5 46.Kh7 a5 47.Kg6 a4 48.f5 a3 49.f6 a2 50.f7 a1Q 51.f8Q Qd4 52.Qf5 Ka6 53.Qa5 (53.Qa5 ba5 54.Kg5–+) 1–0. poganinbezdom – pastravul, kurnik, 2011.

5.c4 Be7 6.a5 ba5 7.Ra5 c6 8.Ra1 cb5 9.cb5 Qb6 (9...a6 10.ba6 Na6 11.Nf3=+) 10.e3= 0–0 (10...a6 11.Bd4 Qc7 12.Nf3=) 11.Nc3 (11.Bd4 Qd6 12.Ra7 Ra7 13.Ba7+=) 11...Qc5 (better 11...Rc8!?=+) 12.Ba3+= Qg5?? (better 12...Qa3 13.Ra3 Ba3+=) 13.Be7+– Re8 14.Bf6 (14.Nf3 Qf5 15.Bd6 Rc8+–) 14...gf6 (14...Qf6 15.d4+–) 15.Nf3 Qg6 16.b6! ab6 17.Ra8 Ba8 18.g3 (18.Qb3 Bf3 19.gf3 Nc6+–) 18...Qf5 19.Bg2 Nc6 20.0–0 Ne7 21.Nd4 Qg6 (21...Qd3 22.Qa4 Bg2 23.Kg2+–) 22.Ba8 (22.Qa4!? Bg2 23.Qd7 Bf1 24.Qe8 Kg7 25.Ne6 fe6 26.Qe7 Qf7 27.Qf7 Kf7 28.Kf1 f5+–) 22...Ra8 23.Qf3 (better 23.Qb3 e5 24.Nde2 Rb8+–) 23...Rc8 (23...d5+–) 24.Qb7 f5 (24...Kf8 25.Qd7 e5 26.Ndb5+–) 25.Qd7 (25.Qd7 Qf6 26.Rb1+–; worse 25.Qb6 e5 26.Qg6 fg6+–) 1–0. AleksandrNekhoroshik – sha_svar, lichess.org, 2020.

5.e3 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 Be7 9.Nf3 0–0 10.Be2 d5 11.0–0 Nbd7 12.d4 Qa8 13.Nbd2 Qa2 (13...dc4 14.Bc4 Bb4 15.Be2=) 14.Bc3 Ra8 15.Qb1 (15.Ne5 Ne5 16.de5 Nd7=) 15...Qa3 (15...Ne4 16.Ne4 Qe2 17.cd5 Bd5 18.Ned2=) 16.Qb2 (16.Rc1 dc4 17.Nc4 Qa4=) 16...Qb2=+ 17.Bb2 Ra2 18.Bc3? (better 18.Rb1=) 18...Ne4 (18...Rc2 19.Ba1 dc4 20.Rd1–+) 19.Ne4 de4 (19...Re2 20.Ned2 dc4 21.Ra1 (21.Nc4?? Rc2–+) 21...Bf3 22.gf3+=) 20.Nd2 Rc2 (20...Rc2 21.c5 Bd5–+) 0–1. BeepBeepImAJeep (2860) – mutdpro (2770), lichess.org, 2017.

5.e3 d5 6.Nf3 Nbd7 7.c4 Bd6 (7...a6 8.cd5 Nd5 9.Nc3=) 8.Be2 (8.cd5 ed5 9.Nd4 Be5=) 8...dc4 9.Bc4 0–0 10.0–0 (10.d3 c6=) 10...Re8 (better 10...Ng4!? 11.g3 Bf3 12.Qf3 Nh2 13.Kh2 Qh4 14.Kg2 Qc4–/+) 11.d4= Qe7 (11...c5 12.Nbd2=) 12.Nbd2 (12.Ne5 a6+=) 12...e5 (12...c5 13.Qe2=) 13.de5 (13.Qc2 a6+=) 13...Ne5= 14.Ne5 (14.Be5 Be5 15.Ne5 Qe5=) 14...Be5 15.Be5 Qe5 16.Nf3 Qh5 17.Be2 Rad8 (17...Ng4 18.h3 Ne5 19.Ne5 Qe5 20.Rc1=) 18.Nd4 Qg6 The mate threat is Qxg2 19.Bf3 Ne4 (19...Nd5 20.Rc1+=) 20.Rc1 Re7?? (20...Rd7 21.Bh5 Qd6 22.Bg4+=) 21.Qc2 (better 21.Nf5! Qe6 22.Qd8 Re8 23.Qc7 Qf5 24.Qb7+–) 21...h6 22.Rfd1 Rde8 (22...Red7 23.a5+=) 23.Nc6 Bc6 24.Qc6 Qg5 (24...Nd6 25.Qc2+–) 25.Be4 Re4 26.Qc7 (26.Rd2 Kh7+–) 26...Ra4+= 27.Qd7 Qe5 28.Rc7 (28.Qc6 Ra5 29.Rd5 Qe6+=) 28...Rf8 29.h3 Ra5 Attacking the isolated pawn on b5 30.Ra7 Ra7 31.Qa7 Qb5 32.Qc7 Qb3 33.Rd6 The isolani on b6 becomes a target 33...b5 34.Rb6 b4 (34...Qd1 35.Kh2 Qe2 36.Qf4=) 35.Qb7 (35.Kh2!?+=) 35...Qd1 36.Kh2 Qd2 37.Rb4 Qf2 38.Qe4 Qf6 39.Qf4 Qe6 40.Qg3 Re8 Attacks the isolani on e3 41.Rg4 (41.Rb8 g5=) 41...g6 42.e4 Qc6 43.Qf3 Re6 44.Rf4 Qd6 45.h4?? (better 45.Kh1=) 45...g5–+ 46.hg5 hg5 47.Qg3 (47.g3 gf4 48.Qg4 Kf8 49.Qf4 Qd3–+) 47...Qf4 48.Qf4 gf4 49.Kg1 (49.Kh3 Rg6–+) 49...Re4 50.Kf2 Re3 51.Kf1 (51.Kg1 Re2–+) 51...Rg3 (51...Kg7 52.Kf2–+) 52.Kf2 f5 53.Kf1 Kg7 54.Kf2 Rg2 55.Kf1 (55.Kg2 Kf6–+) 55...Kg6 56.Kg2 Kg5 (better 56...Kh5 57.Kf3 Kg5–+) 57.Kf3= ½–½. BeepBeepImAJeep (2775) – TwelveTeen (2585), lichess.org, 2016.

5.e3 Be7 6.c4 d6 7.Nf3 e5 (7...0–0 8.Be2=) 8.Be2 Nbd7 (8...a6 9.0–0=) 9.0–0 h6 (9...a6!?=) 10.d4+= 0–0 (10...Bf3 11.Bf3 (11.gf3?! a6=) 11...e4 12.Be2+–) 11.de5+– Ne5 (11...de5 12.Ne5 Bd6 13.Nd7 Nd7 14.Nd2+–) 12.Ne5 de5 13.Be5 Bd6 (13...Nd7 14.Bf4+–) 14.Bd6 Qd6 (14...cd6 15.Bf3 Bf3 16.Qf3+– (16.gf3?! d5+=)) 15.Qd6+– cd6 16.Nd2 (16.a5 ba5 17.Rd1 Rfd8+–) 16...Rad8 17.Nf3 (17.a5 d5+–) 17...Ne4 (17...d5 18.Nd4+–) 18.Rfc1 f5 19.Nd4 Nc5 20.Bf3 (20.a5 f4+–) 20...Bf3 21.gf3 (21.Nf3?! Nb3=) 21...Rfe8 (21...a5 22.ba6 Ra8 23.Rd1+–) 22.Ra3 (worse 22.Nf5 Nb3+=) 22...g6 23.a5 (23.Nc6 Rd7+–) 23...Rb8 (23...Rd7 24.Nc6+–) 24.ab6 ab6 25.Ra7 (25.Rd1 Rb7+–) 25...Rb7 26.Rca1 Ree7 27.Ra8 Kg7 28.Rd8 Red7 29.Raa8 Kf6 30.Nc6 Kg5 31.Kg2 Rdc7 (31...Nd3+–) 32.f4 Kh5 33.Rd6 Ne4 (33...Rd7 34.Rd5 Ne4+–) 34.Rh8?? (34.Rd5 Rd7 35.Rd4 Nc5+–) 34...Rh7 (better 34...Nd6 35.Kh3 Nc4–+) 35.Rh7 Rh7 (35...Nd6 36.Rb7 Nb7+–) 36.Ne5?? (better 36.Rd8+–) 36...Nd2 (better 36...Nd6 37.Nc6 Nc4–+) 37.Rd2+– Rc7 (37...g5 38.fg5 hg5 39.Rd6+–) 38.Rd3 (better 38.Rd6!? g5+–) 38...g5 39.e4 (better 39.fg5!? hg5 40.Rd7 Rd7 41.Nd7 Kg6+–) 39...fe4 (39...gf4 40.Kf3 fe4 41.Ke4 Kh4+–) 40.Rh3 1–0. BeepBeepImAJeep (2585) – maxxxl (1980), lichess.org, 2017.

5.e3 Be7 6.Be2 0–0 7.Nf3 c5 8.0–0 d5 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).

5.Nf3 g6 6.g3 Bg7 7.Bg2 0–0 8.0–0 c6 9.Nc3 d5 10.Qb1 Nbd7 11.d4 c5 12.dc5 Nc5 13.Ba3 Re8 14.Ra2 Nfe4 15.Ne4 Ne4 16.Qb3 (16.Bb2 Nc3 17.Bc3 Bc3–/+) 16...Rc8 17.Rd1? (17.Bb2 Nc3 18.Bc3 Rc3–/+) 17...Rc3 18.Qb4 Qc7 19.Nd2 Bf8 20.Ne4 Bb4 21.Bb4?? (better is 21.Nf6 Kh8 22.Ne8–+) 21...Rc2 22.Nf6+/– Kg7?? 23.Ne8+– Kh6 24.Nc7 Rc7 25.Bd6 Rc4 26.Bf4 g5 27.Be3 Kg6 28.Rc1 Rc1 29.Bc1 a6 30.ba6 Ba6 31.Rb2 Be2 32.Rb6 h5 33.a5 Bc4 34.a6 Kf5 35.a7 (35.a7 g4 36.a8Q Bf1 37.Qb8 Bg2 38.Qf4 Kg6 39.Qg5 Kh7 40.Qh6 Kg8 41.Rb8#) 1–0. wk1234 – jszkodnik, kurnik, 2012.

4.e3

4.e3 (--> 3.e3 e6 4.b5).

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

4.e3 Nf6 5.c4 Be7 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

4.e3 Nf6 5.Nf3 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7).

3.b5 f6

4.a4 e5 5.e3 d6 6.c4 (6.d4 a6=) 6...Nd7 7.Nf3 (7.d4 a6=) 7...Nh6 (7...a6 8.Be2=) 8.Be2+= Nf7 (8...a6 9.0–0+=) 9.0–0 Be7 10.d4 0–0 11.Nc3 a6 12.Rc1 (12.Bd3 c5+=) 12...c6 (12...e4 13.Nd2 f5 14.Qc2+=) 13.Qb3 (13.bc6 Bc6 14.Bd3 Rc8+=) 13...Kh8 (13...f5 14.bc6 Bc6 15.Nd5+=) 14.Rfd1 (14.bc6 Bc6 15.Nd5 Rc8+–) 14...ab5 15.cb5 d5 (15...c5!?+=) 16.bc6+– Bc6 17.de5 (17.Bb5 Bb5 18.Nb5 e4+–) 17...Nde5? (better 17...fe5 18.Qa2 Nc5=) 18.Nd4+– (18.Nd5 Ba4 19.Qb6 Qb6 20.Nb6 Bd1 21.Bd1 Rab8=+) 18...Bb7? (better 18...Bd7+–) 19.Ne6 Qd7 20.Nf8 Bf8 21.Nd5 (21.Qb6 Nd6 22.Nd5 Rc8 23.Rc8 Qc8+–) 21...Qa4 22.Qa4 (22.Qb6 Qa7+–) 22...Ra4 23.Nb6 Rb4 (23...Ra2 24.Be5 Re2 25.Rc7 Ne5 26.Rb7+–) 24.Be5 Ne5 (24...Rb6 25.Bc7 Rb4 26.Bc4+–) 25.Rd8 (25.Rd8 Kg8 26.Nd7 Nd7 27.Rd7+–; better 25.Nd7!? Nd7 26.Rd7 g5+–) 1–0. BeepBeepImAJeep (2745) – zhorik_vartanov (2445), lichess.org, 2020.

4.c4 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nf3 cb5 9.cb5 Qc7 10.e3 Qc5 11.Bd4 Qh5 12.Be2 Qg6 13.0–0 Nh6 14.Nh4 Qf7 15.Bf3 Bf3 16.Nf3 e5 17.Bb6 Bd6 18.Qc2 0–0 19.Nc3 Ng4 20.Ne4 Be7 21.h3 Nh6 22.d4 ed4 23.Bd4 d5 24.Nc5 Bc5 25.Bc5 Rc8 26.Rc1 Nd7 27.Qb3 Nc5 28.Qb4 Qe7 29.Nd4 Nf7 30.Nc6 Qe4 31.Qc5 Qa4 32.Ne7 Kh8 33.Qc8 1–0. chybol3 – ziga1955, kurnik, 2012.

4.e3 a6 5.Nf3=.

4.e3 d6 5.Nf3 e5 6.Be2 Nh6 7.0–0 g5 (7...a6 8.d4+=) 8.h3 (8.d4 a6+/–) 8...Nf7 9.c4 (9.d4 a6+=) 9...h5 10.d4 e4? (10...g4 11.Ne1 gh3 12.gh3 Qd7+=) 11.Nfd2+/– f5 12.Nc3 (12.d5 Rh7 13.Bh5 Qd7+–) 12...Rg8? (12...g4 13.Kh2=) 13.Qb3 a5? 14.a4 c5? 15.Nd5 Bd5 16.cd5 Nd7? 17.dc5?? Nc5+= 18.Qc3 Bg7 19.Qc2 Bb2 20.Qb2 Qe7 21.Nc4 Rb8 22.Bh5 g4 23.Bf7 Qf7?? 24.h4 Qe7 25.Qd4 Kd7 26.Rac1 g3?? 27.f4?? Qh4–+ 28.Rfd1 Qh2 29.Kf1 Qh1 30.Ke2 Qg2 31.Ke1 Qf2 0–1. lousse (1670) – geomuntean (1700), kurnik, 2011.

4.e3 e6 5.Nf3 a6 6.d4 Bb4 7.c3 Be7 8.a4 g6 (8...ab5 9.ab5 Ra1 10.Ba1=) 9.Nbd2 Nh6 10.h3 Nf5 11.g4 Nh4 12.Be2 Ng2 13.Kf1 Nh4 14.Rh2 g5 (better is 14...Bd6!? 15.Rh1 ab5 16.ab5 Ra1 17.Ba1 h5+=) 15.Nh4+= gh4 16.e4 ab5 17.ab5 Ra1 18.Qa1 (18.Ba1 d5+=) 18...c6 (18...Bd6!? 19.Rg2 Bf4=) 19.bc6 Nc6 20.f4 White intends e5 (20.c4 Bb4 21.Nf3 d5 22.cd5 ed5+=) 20...Qc7 21.Rf2 Bd6 22.e5+/– fe5 23.fe5 Be7 24.g5 Rg8 25.Bh5 Kd8 26.Ne4 Na5?? 27.Nf6?? Bf6 28.gf6 Bg2?? 29.Ke1 Be4?? 30.Qa3 Kc8?? 31.f7 Rg1 32.Kd2 Nc4 33.Ke2 Na3 34.f8Q Kb7 35.Bf3?? Qc4–+ 36.Ke3 Re1 (36...Re1 37.Kd2 Qd3 38.Ke1 Nc4+–) 0–1. poganinbezdom – dunsky, kurnik, 2011.

4.e3 g6 5.Nf3 Bg7 6.Be2 Nh6 7.0–0 0–0 8.h3 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 d6 12.Bc4 Kh8 13.d3 d5 14.Bb3 e6 15.Nbd2 Nd7 16.Nd4 Re8 17.N2f3 Nc5 18.Nc6 Bc6 19.bc6 Qd6 20.Nd4 Nb3 21.cb3 e5 22.Ne2 Qc6 23.Ng3 Nf7 24.f4 e4 25.de4 de4 26.Qd4 Nd6 27.f5 g5 28.Nh5 Qd7 29.Nf6 Qf7 30.Rc1 Nf5 31.Qd7 Qd7 32.Nd7 Ba1 33.Ra1 Ne3 34.Ra7 Re7 35.Nf6 Kg7 36.Nh5 Kh6 37.Ng3 Nd5 38.Nf5 Kg6 39.Ne7 Ne7 40.Rc7 Kf6 41.g4 e3 42.Kf1 h6 43.Ke2 b5 44.Rb7 b4 45.Rb4 Nd5 46.Rd4 Ke5 47.Ra4 Nf4 48.Ke1 Nh3 49.b4 Kf4 50.b5 Kf3 51.b6 Nf4 52.b7 Ng2 53.Kd1 e2 54.Kc2 e1Q 55.b8Q Ne3 56.Kd3 Qd1 57.Kc3 Qa4 58.Qb4 Qb4 59.Kb4 Ng4 0–1. avinoam – dorecho, kurnik, 2012.

4.e3 h6 5.Nf3 g6 6.Nh4 Bg7 7.Ng6 Rh7 8.Nf4 f5 9.Qh5 Kf8 10.Ng6 Kf7 11.Ne5 Ke6 12.Qg6 Bf6 13.Bc4 d5 14.Qh7 dc4 15.Qf7 Kd6 16.Nc4 Kc5 17.Ba3 Kb5 18.Nc3 Ka6 19.Rb1 Bc3 20.dc3 Bd5 21.Qf5 Bc4 22.Qe4 Bd5 23.Qa4 Kb7 24.c4 Bc6 25.Qb4 Na6 26.Qc3 Nf6 27.0–0 Ne4 28.Qe5 Nd2 29.Rfd1 Qg8 30.g3 Nb1 31.Rb1 Rd8 32.c5 b5 33.Qe7 Rd7 34.Qe5 Qg4 35.Qf4 Qf4 36.ef4 Rd2 37.Re1 Rc2 38.f5 Ra2 39.Bc1 Bd5 40.Bh6 Rc2 41.f6 Rc5 42.h4 Nb4 43.Re7 Kc6 0–1. chybol3 – adamjakub, kurnik, 2012.

4.f3 e5 5.e4 Bc5 6.c3 Bg1 7.Rg1 c6 (7...a6 8.d4=) 8.a4 cb5 9.ab5 Ne7 10.Ba3 d5 11.d3 de4 (11...a6 12.d4=) 12.fe4 (12.de4 Qd1 13.Kd1 a6+/–) 12...0–0 13.Qb3 Kh8 14.Qe6 (14.Nd2 a6+=) 14...Re8 15.Qh3 (15.Qf7 a6=) 15...Qd7 (15...a6 16.ba6 Na6 17.Be2+=) 16.Be2 (16.Qd7 Nd7 17.Nd2 a6+=) 16...Qh3 17.gh3 Nd7 18.h4 (18.Nd2 a6=) 18...Nc5 (18...a6 19.ba6 Ra6 20.h5=) 19.h5 (19.Nd2 Red8+=) 19...h6 (better is 19...a6!?=) 20.Nd2 Rac8 21.Nc4 Red8 22.0–0–0 Nb3? 23.Kb2+– Na5? 24.Na5 ba5 25.Bg4 Rc7 26.d4 Be4 27.Rge1 Bf5? 28.Be7+– Bg4 29.Bd8 Bd1 30.Bc7 Bh5 31.d5 Be8 32.c4 g5 33.Bb8 Kg7 34.Ba7 Kg6 35.b6 Bd7 36.b7 f5 37.b8Q e4 38.Qg8 Kh5 39.Qf7 Kg4 40.Bb8 Ba4 41.Rg1 Kh4 42.Qf5 Bd1 43.Rd1 h5 44.Rg1 g4 45.Bg3 Kh3 46.Qg5 (46.Qg5 e3 47.Qh5#; 46.Qh5#) 1–0. manuel2 – Grigoropoulos23, Live Game Caissa's Web, 2004.

4.Nf3 e5 5.c4 Qe7 6.Nc3 Qb4 7.Qb3 Nh6 8.Qb4 Bb4 9.e4 Bc3 10.Bc3 Be4 11.d4 ed4 12.Nd4 Nf5 13.f3 Nd4 14.fe4? (better is 14.Bd4 Bg6 15.c5+=) 14...Nc2–+ 15.Kd2 Na1 16.Ba1 c6 (better is 16...a6!? 17.a3–+) 17.a4 cb5 18.ab5 d6 19.g4 Nd7 20.Bg2 Rc8 21.Rc1 Nc5 22.Ke3 0–0 (better is 22...Nb3 23.Rb1 Na5–+ (23...Na1?! 24.Ra1 Rc7 25.Bf3–+)) 23.Kd4?? (better is 23.Rd1–+) 23...Nb3 24.Kd5 Nc1 0–1. iczker – maiaxadrez, kurnik, 2012.

4.Nf3 e5 5.e3 d5 6.Be2 Bd6 7.Nh4 (7.c4!?=) 7...Ne7 8.Bh5 g6 9.Bg4 f5 10.Be2 Qd7 (10...Nd7 11.f4 0–0 12.0–0=) 11.c4 (11.f4!? Qe6 12.Nf3+=) 11...Qe6 12.Nf3 Rg8 13.Qc2 Nd7 14.Ng5 Qf6= 15.h4 Rg7 16.Nc3 h6 17.Nf3 Nc5 18.0–0–0 a6 19.Nd5 Nd5=+ 20.cd5 Bd5 21.d4+= Ne4?? 22.de5+– Be5 23.Be5 Qc6 24.Bg7 Qc2 25.Kc2 Ba2 26.Bh6 Nf2 27.Ra1 Bd5 28.Rhe1 a5 29.Ne5 Ne4 30.Ng6 Nd6 31.Bg5 Kf7 32.h5 Ne4 33.Nf4 Bb7 34.Bh4 Kg7 35.g4 Nf6 36.g5 Ne4 37.h6 Kh7 38.Ne6 Bc8 39.Nf8 Kh8 40.g6 Nf6 41.g7 Kg8 42.Ng6 Nh7 43.Nf4 Bd7 44.Bc4 Be6 45.Ne6 Kf7 46.Nc7 1–0. stoker – chaser, Live Game Caissa's Web, 2004.

4.e3 e5

5.d4 e4 6.Bc4 d5 7.Bb3 Bd6 8.c4 Ne7 9.Nc3 dc4 10.Bc4 Bb4 11.Qb3 Bc3 12.Bc3 Bd5 13.Ne2 Bc4 14.Qc4 Nd5 15.Bb4 Nb4 16.Qb4 Qd6 17.Qc4 Nd7? (17...a6!?+=) 18.Rc1 Rc8 19.Nf4 g5 20.Nd5 c5 (better is 20...Kd8!?+/–) 21.bc6+– Nb8 22.c7 Nd7 23.0–0 h5 24.Qa6 0–0 25.Qb7 Kg7 26.a4 a5 27.Rc4 Qd5 (27...Qd5 28.Qd5 Rf7+–). typ48 – iulian59, kurnik, 2012.

5.Nf3 c6 6.c4 d5 7.a4 a6 8.Nh4 ab5 9.cb5 cb5 10.ab5 Ra1 11.Ba1 Bc5 12.Qh5 g6 13.Ng6 hg6 14.Qh8 Kd7 15.Qg7 Ke6 16.Qb7 Nd7 17.Be2 Ne7 18.Nc3 e4 19.d4 Bb4 20.0–0 f5 21.f3 Nf6 22.fe4 Ne4 23.Ne4 fe4 24.Bg4 Kd6 25.Rf6 1–0. chybol3 – sikovnyhektor, kurnik, 2012.

5.Nf3 d5 6.Be2 Bd6 7.0–0 Nd7 8.d3 Ne7 9.Nbd2 0–0 10.c4 Ng6 11.cd5 Bd5 12.e4 Bb7 13.Nc4 Nc5 14.a4 Be7 15.Nfd2 Nf4 16.Nb3 Ne2 17.Qe2 Qd3 18.Qd3 Nd3 19.Ba3 Ba3 20.Ra3 Be4 21.Ne3 Bg6 22.Nd2 Nc5 23.Nf3 Rfd8 24.Raa1 Rd3 25.Rfd1 Rad8 26.Rd3 Rd3 27.g3 Be4 28.Nh4 g5 29.Nhf5 Bf5 30.Nf5 Kf7 31.a5 Ke6 32.Ne3 Nb3 33.Ra3 Nc5 34.Ra1 f5 35.ab6 ab6 36.Ra7 f4 37.gf4 ef4 38.Ng4 f3 39.h3 h5 40.Ne3 Kd7 41.Kh2 Rb3 42.Kg3 Rb5 43.Kf3 Ra5 44.Ra5 ba5 45.Nc4 a4 46.Ke2 Ke6 47.Kd2 Kf5 48.Kc3 Ne4 49.Kb4 Nf2 50.h4 g4 51.Ka4 g3 52.Ne3 Ke4 53.Ng2 Kf3 54.Ne1 Kg4 55.Ng2 Kh3 56.Nf4 Kh4 57.Kb5 Kg4 58.Ng2 h4 59.Ne3 Kf3 60.Nf1 h3 61.Kc6 h2 0–1. avinoam – iulian59, kurnik, 2012.

5.Nf3 d5 6.Be2 Nd7 7.0–0 Bd6 8.d3 Ne7 9.Nbd2 0–0 10.c4 dc4 11.Nc4 Nc5 12.d4 ed4 13.ed4 Ne6 14.Qc2 Rb8 15.a4 Ng6 16.Ne3 Bf3 17.Bf3 Nh4 18.Bd5 Qd7 19.Qb3 Kf7 20.g3 Ng6 21.f4 Ne7 22.f5 Nd5 23.Qd5 Rfe8 24.fe6 Qe6 25.Qe6 Re6 26.Nf5 Bb4 27.Rac1 Rc8 28.Rfe1 Be1 29.d5 Re4 30.Nd6 Kg6 31.Nc8 Bb4 32.Na7 Re2 33.Bc3 Bc5 34.Kf1 Rh2 35.Nc6 Rh1 36.Ke2 Rc1 37.Kd2 Rg1 38.Nd8 Rg2 39.Kc1 Ba3 40.Kd1 Rg3 41.Kc2 h5 42.Ne6 Bd6 43.a5 ba5 44.Ba5 h4 45.Be1 Rg2 46.Kd3 h3 47.Nd4 h2 48.Nf3 h1Q 49.Bd2 Qf1 50.Ke3 Qf2 51.Ke4 Qe2 52.Kd4 Qf3 53.Be3 Re2 0–1. avinoam – iulian59, kurnik, 2012.

5.Nf3 d6 6.Be2 Qd7 7.0–0 Bf3 8.Bf3 d5 9.c4 e4 10.Be2 c6 11.a4 Ne7 12.cd5 Qd5 13.Nc3 Qg5 14.Ne4 Qf5 15.Nd6 1–0. avinoam – padlinawalina, kurnik, 2012.

5.Nf3 Ne7 6.Be2 Ng6 7.h3 Be7 8.0–0 0–0 9.c4 d5 10.cd5 Bd5 11.Nc3 Bb7 12.Bc4 Kh8 13.d4 e4 14.Nd2 f5 15.a4 c6 16.Nb3 a6 17.Qe2 ab5 18.ab5 Ra1 19.Ra1 Qd6 20.Ba3 Qc7 21.Be7 Qe7 22.Ra7 f4 23.bc6 Nc6 24.Ra1 f3 25.Qc2 fg2 26.Ne4 Nb4 27.Qd2 Be4 28.Ra4 Nd5 29.Bd5 Bd5 30.Nc1 Nh4 31.Ne2 Nf3 0–1. chybol3 – ulia76, kurnik, 2012.

5.Nf3 Nh6 6.Be2 Bd6 7.0–0 Nf7 8.c4 0–0 9.d4 ed4 10.Nd4 Be5 11.f4 Bd4 12.Qd4 c5 13.Qc3 d5 14.cd5 Bd5 15.Bf3 Bf3 16.Rf3 Nd6 17.Nd2 Qe7 18.Re1 Nd7 19.Nc4 Ne4 20.Qc2 f5 21.Ne5 Ne5 22.Be5 Rad8 23.Rd1 Rd1 24.Qd1 Rd8 25.Qb3 Kh8 26.h3 h6 27.Kh2 Rd2 28.a4 Kh7 29.a5 Qd7 30.ab6 ab6 31.Qa3 Rd3 32.Qa1 c4 33.Bd4 c3 34.Qb1 Rd2 35.Qc1 c2 36.Rf1 Qb5 37.Re1 Qd3 38.Qa1 Rd1 39.Bg7 Ra1 40.Ra1 Qe3 41.Bb2 Qg3 42.Kg1 Nd2 43.Rc1 Nf3 44.Kf1 Nh2 45.Kg1 Nf3 46.Kf1 Nd2 47.Ke2 Qg2 48.Kd3 Nf3 49.Rc2 Ne1 50.Kd4 Qc2 0–1. avinoam – shemi2008, kurnik, 2012.

5.Qh5 g6 6.Qd1 d5 7.c4 Bb4 8.Qb3 Qd6 9.Nc3 dc4 10.Qc4 Bc3 11.Bc3 Ne7 12.Bb4 Qd5 13.Be7 Qc4 14.Bc4 Ke7 15.f3 Nd7 16.Ne2 Nc5 17.d4 ed4 18.Nd4 Rhd8 19.Kf2 a6 20.Rhd1 ab5 21.Nb5 c6 22.Nd4 b5 23.Be2 Na4 24.Rac1 Rac8 25.g4 Rd5 26.e4 Rc5 27.Ke3 Nc3 28.Rd3 b4 29.Nb3 Rc4 30.f4 Ba6 31.Rc2 Ne2 32.Re2 Rc3 33.Rc3 Be2 34.Rc2 Bg4 35.Nd4 c5 36.Nb5 Bd7 37.Na7 Rc7 38.e5 fe5 39.fe5 Ra7 40.Rc5 Ra2 0–1. jura1946 – velko, kurnik, 2012.

5.Qh5 g6 6.Qd1 Bg7 7.Nf3 Ne7 8.Bc4 d5 9.Bb3 0–0 10.c4 dc4 11.Bc4 Kh8 12.0–0 Nd7 13.d4 e4 14.Nfd2 f5 15.a4 Bd5 16.Qb3 Nf6 17.Nc3 a6 18.ba6 Bc4 19.Nc4 Ra6 20.Ne5 Nfd5 21.Qb5 Ra8 22.Rac1 Be5 23.de5 Nc3 24.Bc3 Qd5 25.e6 Kg8 26.Qd7 Qd7 27.ed7 Rfd8 28.Rfd1 Ra4 29.Bf6 Kf7 30.Bh4 c5 31.Rd6 Rb4 32.Rf6 Kg7 33.Rd1 Rd7 34.Ra1 h6 35.Re6 g5 36.Bg3 h5 37.h4 g4 38.Ra6 Nd5 39.Be5 Kf7 40.Rh6 c4 41.Rh5 c3 42.Ra1 c2 43.Rc1 Rb1 44.Rf5 Ke6 0–1. jura1946 – velko, kurnik, 2012.

3.b5 Nf6

4.a4 (--> 3.a4 Nf6 4.b5).

4.c4 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.Nc3 cb5 9.cb5 d6 10.Nf3 e5 11.e3 g6 (11...Nbd7 12.Be2=) 12.Bc4 Bg7 13.Qb3 0–0 14.Ng5 (14.0–0!?=) 14...d5–/+ (worse 14...Bg2 15.Bf7 Kh8 16.Rg1+–) 15.Be2 (better 15.Bf1–/+) 15...Ne4 (better 15...d4!? 16.ed4 ed4–+) 16.Nce4 de4 17.h4 Kh8?? (better 17...h6 18.Nf7 Rf7=+) 18.Nf7+– Rf7 19.Qf7 Nd7?! (19...Bd5 20.Qa7 Nd7+–) 20.h5 Nc5 (20...g5+–) 21.hg6 h6 22.Rh6! Bh6 (22...Bh6 23.Qh7 Mate attack) 23.Qh7 1–0. AvImd (1770) – nhattrung221188 (1770), lichess.org, 2020.

4.c4 c6 5.a4 e6 6.Qb3 d5 7.e3 (7.cd5 cd5 8.Nf3 Nbd7=) 7...dc4 8.Bc4 Be7 (8...cb5 9.Qb5 Nbd7 10.Nf3=+) 9.Nf3= 0–0 10.d4 c5 (10...a6 11.ba6 Ba6 12.Ba3=) 11.Nbd2= Ne4 (11...Nbd7 12.0–0=) 12.Bf1 (12.Rd1!? Nd2 13.Rd2+=) 12...Nd2=+ 13.Nd2 Nd7 14.0–0–0 (14.Rc1!?=+) 14...Bd5 (14...cd4 15.Bd4 Rc8 16.Kb1–+) 15.Nc4 (15.Bc4 cd4 (15...Bg2?! 16.Rhg1 Bd5 17.Bd5 ed5 18.Qd5 cd4 19.Bd4=) 16.Bd4 A) 16...Bg2?! 17.Bg7 Bh1 18.Rg1= (worse 18.Bf8 Qf8 19.Rg1 Kh8 20.Rh1 Qg7=+); B) 16...Rc8–/+) 15...Nf6 (15...Rc8!?–/+) 16.dc5 Bc5 17.Rd5? (better 17.f3–/+) 17...ed5–+ 18.Nd2 (18.Ne5 Ne4 19.Qc2 Qh4–+) 18...Ne4 Black prepares the advance d4 (18...Ng4 19.Be2 Nf2 20.Rf1–+) 19.f3? (19.Ne4 de4 20.Qc3–+) 19...Nd2 (19...Nf2!? 20.Rg1 Re8 21.Qc3–+) 20.Kd2 d4 (better 20...Re8!? 21.Kd1–+) 21.e4 Qg5 22.Kd1 Rad8 23.g4? (23.Bc1 Qf6–+) 23...Qf4 (23...d3 24.Bd3 Rd3 25.Qd3–+) 24.Bg2? (better 24.Bc1 Qe5 25.Qd3–+) 24...Qe3 25.Qc2 Bb4 (better 25...Ba3 26.Re1 Bb2 27.Qb2 Qd3 28.Qd2 Qa3–+) 26.Re1?? (better 26.Bc1 Qc3 27.Qc3 Bc3 28.Kc2–/+) 26…Qe1 0–1. afsharian (1610) – Lesenyehoba, lichess.org, 2019.

4.c4 d5 5.e3 c5 6.d4 e6 7.a4 Bd6 8.Nf3 Nbd7 9.Be2 0–0 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.a4 Bb7 10.d4).

4.c4 g6 5.Nc3 Bg7 6.e3 0–0 7.Nf3 Re8 8.Be2 e5 9.0–0 d5 10.d4 ed4 11.ed4 dc4?? (better is 11...a6=) 12.Bc4+– Qd6? (12...Ne4 13.Ne4 Re4+– (13...Be4 14.Qb3 Rf8 15.Ne5 Be5 16.de5+–)) 13.Qb3 Rd8 (13...Bf3 14.Bf7 (14.gf3?! Qd7+=) 14...Kh8 15.gf3+–) 14.Bf7 (better is 14.Ne5!? Nd5 15.Ba3 Qe6+–) 14...Kh8 15.Ba3 Qf4 16.Ne2 Qg4 (16...Qe4 17.Rfe1 Nbd7 18.Rac1+–) 17.Be6 Qe4? (17...Bd5 18.Bg4 Bb3+–) 18.Ng3 (18.Nc3 Qf4 19.Ne5 Rf8 20.Bf8 Bf8+–) 18...Qf4 (18...Bd5 19.Ne4 Bb3 20.ab3 Ne4+–) 19.Ne5 Qd4 (19...Rf8 20.Bf8 Bf8 21.Nf7 Kg7+–) 20.Nf7 Kg8 21.Nd8 Kh8 22.Nb7 1–0. wpech (1695) – bblchess (1790), gameknot.com, 2011.

4.c4 g6 5.Nc3 Bg7 6.Nf3 d6 7.d4 e6 Controls d5 8.Qc2 Qe7 9.e4 Nbd7 10.Bd3 Black has a cramped position 10...0–0–0 (10...a6!?+= is worth consideration) 11.a4+– Nb8 (11...e5!? 12.d5 Ne4 13.Ne4 f5+–) 12.a5+– Nfd7 13.ab6 ab6 14.Na4 f5 15.c5 (better 15.0–0!?+–) 15...dc5+= 16.dc5 (16.0–0 Nf6 17.ef5 Bf3 (worse 17...ef5 18.dc5 bc5 19.Rfe1+–) 18.dc5 A) 18...gf5? fails because of 19.Nb6 (19.gf3?! Nd5 20.cb6 Rhg8+=) 19...cb6 20.cb6 Kd7 21.Ra7 Ke8 22.Re7 Ke7 23.gf3+–; B) 18...Nd5 19.Nb6 Nb6+–) 16...Nc5 (16...Bb2 17.Qb2 fe4 18.cb6 A) worse 18...ed3 19.bc7 Rhf8 A1) worse 20.cb8R Kb8 21.Qd4 Nf6–/+ (21...Bf3 22.gf3 Nf6 23.Qb6 Qb7 24.Qb7 Kb7 25.Nc5 Kb8 26.Kd2+=); A2) 20.Nd4+–; B) worse 18...ef3 19.bc7 Rde8 20.cb8Q (worse 20.cb8B fg2 21.Rg1 Kb8=+; 20.cb8R?! Kb8 21.g3 Qf6+=) 20...Kb8 21.g3+=; C) 18...c5 19.bc6 Bc6 20.Be4 Be4=+) 17.Bg7 (17.Nc5 Bb2 A) worse 18.Nb7 A1) worse 18...Ba1 19.Nd8 (19.ef5?? the pawn contains a lethal dose of poison 19...ef5 20.Kf1 Kb7–+) 19...Rd8 20.0–0+=; A2) 18...Qb4 19.Nd2 Rd3 (19...Ba1?! 20.Nd8 Rd8 21.Ke2=+) 20.Qd3 Ba1–+; B) 18.Qb2 Qc5 19.Ra4=) 17...Nd3?? there were better ways to keep up the pressure (17...Qg7 18.0–0 Rd3 19.Nc5 bc5 20.Qd3 fe4–/+) 18.Ke2?? with this move White loses his initiative (better 18.Kf1 Be4 19.Bh8+–) 18...Rhg8?? ignoring the path to victory (better 18...Nf4 Black has a promising position 19.Kf1 Be4–+) 19.Nb6 1–0. AvImd (1775) – Ndricim_Allushi (1765), lichess.org, 2020.

4.d4 a6 A) 5.Nf3 e6 6.e3 (6.a4 Bb4 7.Bc3 Qe7 8.Qd2 Bc3 9.Qc3 d6 10.a5 ab5 11.e3–/+) 6...Bb4 7.Bc3 Qe7 8.a3 Bd6 9.Nbd2 Ba3 10.Qb1 Nd5 11.Qb3–/+; B) 5.a4 e6 6.e3 (6.Nf3 Bb4 7.Bc3 Qe7 8.Qd2 Bc3 9.Qc3 d6 10.a5 ab5 11.e3–/+) 6...Bb4 7.Bc3 Qe7 8.Qd2 Bc3 9.Qc3 Nd5 10.Qb3 ab5 11.Bb5–/+; C) 5.e3 e6 6.Nf3 Bb4 7.Bc3 Qe7 8.a3 Bd6 9.a4 Ne4 10.Bb2 0–0 11.Bd3+=.

4.d4 e6 5.Nd2 d5 (5...a6 6.a4 Be7 7.Ngf3 0–0 8.e3 Re8 9.Bd3 c6 10.–0 d6 11.Qe2=) 6.e3 (6.Ngf3 Bd6 7.e3 0–0 8.Bd3 a6 9.a4 Nbd7 10.–0 c5 11.bc6=) 6...Nbd7 (6...Bd6 7.Ngf3 a6 8.Ne5 0–0 9.Qf3 Ne4 10.Ne4 de4 11.Qg4–/+) 7.Ngf3 c5 (7...a6 8.ba6 Ba6 9.Ba6 Ra6 10.–0 Bd6 11.c4+=) 8.bc6 (8.Bd3 cd4 9.ed4 Bd6 10.–0 0–0 11.Qe2=) 8...Bc6 9.Ne5 (9.Bd3 Bd6 10.–0 0–0 11.c4=) 9...Rc8 (9...Ne5 10.de5 Nd7 11.Bd3=) 10.Ba6 Rc7 11.0–0 (11.Nc6+=) 11...Ne5 12.de5 Nd7 13.a4 Nc5 14.Bb5 Bb5 15.ab5 Be7 16.Qe2 0–0 17.Nf3 Qc8 18.Nd4 Nd7 (better is 18...Qd7!?=) 19.Nc6+/– Rc6 (19...Qe8 20.Na7 f6 21.ef6 Bf6 22.Bf6 Nf6 23.Qd3+/–) 20.bc6+– (20.bc6 Qc6 21.Ra7+–) 1–0. Taulien,Christian (2110) – Decker,Holger (1830), RST4–6D–1 remoteschach.de, 2004.

4.d4 e6 5.e3 a6 6.Nf3 Bb4 7.Bc3 Qe7 8.a3 Bc3 9.Nc3 ab5 10.Nb5 d5 11.Bd3+=.

4.d4 e6 5.Nf3 a6 6.e3 Bb4 7.Bc3 Qe7 8.a3 Bc3 9.Nc3 ab5 10.Nb5 d5 11.Bd3+=.

4.e3 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 e6 8.Nf3 d6 9.c4 c5 (9...c6 10.bc6 Nc6 11.Bf6 Qf6 12.Qb3=) 10.d4 Be7 (10...d5 11.Nbd2=) 11.Bd3 (11.dc5 bc5 12.Bd3 0–0=) 11...0–0 12.0–0 h6 (12...cd4 13.Nd4 (worse 13.Bd4 e5–/+) 13...Qc7 14.Nd2=) 13.Nbd2 Nbd7 14.Qc2 (14.e4 cd4 15.Bd4 Qc7=) 14...Qa8 (14...Qc7 15.e4=) 15.Bb2 Kh8 16.Ra1 Qc8 17.Ra7 Qc7 18.Qa4 Ng4 (18...Qb8!?+=) 19.Be4+– Rb8 20.Bc6 cd4 21.ed4 e5? (better 21...Ngf6!?+–) 22.Qa6!+– Ba6?? (22...Qc6 23.bc6 Ba6 24.Ra6 Ndf6+–) 23.Rc7 Bc8 24.Bd7 Bd7 25.Rd7 Bf8 (25...Re8 26.Rb7 Bf6 27.Ne4+–) 26.de5 de5 27.Ne5 Ne5 28.Be5 Re8 29.Bd4 Re1 30.Nf1 Bc5 31.Bc5 bc5 32.Rf7 Rc1 33.b6 Rc4 (33...Kh7 34.b7 Rb1+–) 34.b7 Rb4 35.Rf8 Kh7 36.b8Q Rb8 37.Rb8 Kg6 1–0. DEFFM – destructors, freechess.org, 2019.

4.e3 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 e6 8.Nf3 Nh5 9.Be2 Rg8 (9...Nf6 10.Nc3=) 10.0–0+= c6 (10...Nf6 11.Bb2+–) 11.c4 (11.Nc3 Nf6+=) 11...cb5 (11...Nf6 12.Qc2+–) 12.cb5 Qc7 (12...Nf6 13.Qc2+–) 13.d4 (13.Ng5 Nf6+–) 13...Bd6 (13...Nf6 14.Qd2+–) 14.Nbd2 Bf3 (14...f5 15.Qb1+–) 15.Nf3 (15.Bf3?! Bh2 16.Kh1 Nf6+=) 15...Qa7 (15...Nf6 16.Qb1+–) 16.d5+– Nf4?? (better 16...Qc7+–) 17.ef4 Bf4 (17...Qc7 18.Qb1 g6 19.Rc1+–) 18.g3 (18.Qc2 Qb7 19.Qh7 Kf8+–) 18...Bc7 (18...Bh6 19.Qc2 Qb7 20.d6+–) 19.Qc2 Qa8 (19...Qb7+–) 20.Qc7 ed5 21.Qc8 (21.Re1 Qa5 22.Qb8 Ke7 23.Qg8 d4 24.Bc4 Qe1 25.Ne1 g6 26.Qf7 Kd8 27.Bd4 Kc7 28.Be5 Kb7 29.Qd7 Ka8 30.Bd5) 21...Ke7 22.Qg8 Ke6 23.Qe8 Kd6 24.Be5 Kc5 25.Qf8 d6 26.Qd6 1–0. DEFFM – mazrun, freechess.org, 2018.

4.e3 c5 5.c4 d5 6.Nf3 Nbd7 7.d4 e6 8.Be2 Qc7 9.Nbd2 Bd6 10.h3 0–0 11.0–0 Rfe8 12.a4 (12.dc5 bc5 13.Qc2 e5=) 12...a6 (12...cd4 13.Nd4 Red8 14.cd5 Bd5 15.Rc1=) 13.Qc2 (13.dc5 bc5 14.Qc2 ab5 15.ab5 Qb6=) 13...Ra7 (13...cd4 14.Nd4 Rec8 15.ba6 Ba6 16.Nb5 Bb5 17.ab5 Bh2 18.Kh1 Ra1 19.Ra1=) 14.Rfc1 (14.cd5 Nd5 (worse is 14...Bd5 15.e4+/–) 15.Nc4 Rc8=) 14...ab5 15.ab5 Rea8 (15...Ra1 16.Ra1 cd4 17.Nd4=) 16.Ra7 Ra7 17.Ra1 (17.cd5 ed5 (17...Bd5? 18.e4+–) 18.dc5 bc5= (worse is 18...Qc5 19.Qf5 Qb4 20.Bc3+/–)) 17...Ba8 (17...Ra1 18.Ba1 cd4 19.Nd4=) 18.Qc1 (18.Ra7 Qa7 19.cd5 ed5+= (19...Bd5? 20.e4+–)) 18...cd4 19.Bd4 (19.Ra7 Qa7 20.Nd4 Qc7=) 19...Bc5 (19...Ra1 20.Qa1 Bb7 21.Bc3=) 20.Ra7= Qa7 21.Qa1 Qb8 (21...Qa1 22.Ba1 Bb4 23.Nb3=) 22.Ne5 Bd4 23.Nd7 (23.ed4 Bb7=) 23...Ba1 24.Nb8 Bc3 25.Nb3 (25.Nb1 Bb2=) 25...Kf8 (25...dc4 26.Bc4 Bd5 27.Bd5 Nd5 28.Kf1=) 26.c5 bc5 27.Nc5 Ba5? (better is 27...Ke7=) 28.b6!+– Ne4 (28...Bb6 29.Nbd7) 29.b7 (29.Ne4 de4 30.Ba6 Bd5+–) 29...Bb7 30.Nb7 Be1 31.f3 Nc3 32.Bd3 g6 33.Nd7 Ke7 34.Ndc5 Nd1 35.e4 d4 36.Ba6 Nb2 37.Nd3 Nd3 38.Bd3 Bb4 39.e5 g5? 40.Bh7 f5 41.ef6! Kf6 42.Nd8 e5 43.Kf1 Bc3 44.Ke2 Ke7 45.Nc6 Kd6 46.Be4 Ke6 47.g3 Bb2 48.Nb4 Ba3 49.Nd3 Be7 50.Nf2 Bd8 51.Kd3 Ba5 52.h4 gh4 53.gh4 Bd8 54.h5 Bg5 55.Ng4 Bf4 56.h6 Kf7 57.Kc4 Kg8 58.Kd5 Kh8 59.h7 Bc1 60.Ne5 d3 61.Bd3 (61.Bd3 Bd2 62.Nf7 Kg7 63.Ke6 Bf4 64.h8Q#; 61.Nf7 Kg7 62.Ke6 d2 63.h8Q#) 1–0. Schwichtenberg,Juergen – Sabejinski,Simeon, 18sen.DSenEM(GrB) op, 2006

4.e3 c5 5.c4 d5 6.Nf3 Nbd7 7.d4 e6 8.Be2 Qc7 9.Nbd2 Rd8 10.0–0 (10.cd5 Bd5 11.Qc2 Rc8=) 10...Bd6 (10...cd4 11.Nd4 Bd6 12.f4=) 11.Rc1 0–0 12.Re1 (12.cd5 Bd5 13.Qc2 Ng4+=) 12...Ne4 13.g3 (13.h3 Ndf6=) 13...dc4 (13...Ndf6 14.Qa4=) 14.Rc4 (14.Ne4 Be4 15.Nd2 c3 16.Bc3 Bb7=) 14...Ndf6 (14...Qb8 15.Ne4 Be4 16.Rc1=) 15.Ne4 (15.dc5 bc5 16.Qc2 Nd2 17.Nd2 Nd7=) 15...Ne4+= (15...Be4 16.dc5 Bf3 17.cd6 Qc4 18.Bc4 Bd1 19.Rd1=) 16.Bd3 Bd5 17.Ra4 (17.Rc1 Qb7+=) 17...Qb7 (17...c4 18.Be4 Be4 19.Ba3+=) 18.Qc2 (better is 18.dc5 bc5 19.Qc2+=) 18...h6 (better is 18...Rc8!?+=) 19.dc5+= Nc5 20.Qc3?? (better is 20.e4 Na4 21.Qa4 Ba2 22.Rd1+/– (22.Qa2?! Bg3 23.Qb3 Bf4=)) 20...f6 (better is 20...e5!? 21.Rh4 Nd3 22.Qd3 Bf3 23.e4–+) 21.Rg4 (21.e4 Na4 22.Qc2–+) 21…Bf3 (21...Bf3 22.Rd4 Be5–+ (worse is 22...Nd3 23.Qd3 Qe7 24.e4–+); worse is 21...Nd3 22.Qd3 Bf3 23.Rd4–+) 0–1. Woelfelschneider,Peter – Pollakowski,A, Obernburg, 1983.

4.e3 c5 5.c4 d6 6.Nf3 Nbd7 7.Be2 e5 8.0–0 Be7 9.d4 ed4 10.ed4 0–0 11.Nc3 (11.d5 Re8+=) 11...h6 (11...d5 12.Re1=) 12.d5+= Nh7 (12...a6 13.Re1+=) 13.Qc2 f6 (13...Re8 14.Bd3 Nhf6 15.Rfe1+–) 14.Bd3 Ng5 15.Nh4 Ne5 16.Be2 Qe8? (better 16...Nd7+–) 17.f4 Nc4 (17...a6+–) 18.Bc4 (18.fg5?! Ne3 19.Qg6 Nf1 20.gh6 Qg6 21.Ng6 Rfe8 22.Rf1 Bd8+–) 18...Qh5 1–0. GuestCGND – guestabd, freechess.org, 2019.

4.e3 c6 5.a4 a6 6.Nf3 ab5 (6...e6 7.Bd3=) 7.ab5 Ra1 8.Ba1 cb5 (8...e6 9.Bc4=) 9.Nc3 (9.Bb5 e6+=) 9...Bc6 (9...b4 10.Nb5=) 10.Bb5 (10.Nb5 e6+=) 10...Bb5 (10...e6 11.Qe2+=) 11.Nb5 d5 (11...e6 12.0–0+=) 12.Be5+– Nc6 (12...e6 13.Nc7 Kd7 14.Ng5+–) 13.Nc7 (13.Bc7 Qc8+–) 13...Kd7 14.Qe2 Ne5? (better 14...e6!?+–) 15.Ne5+– Kc7 16.Nf7 Qa8 (16...Qc8 17.Nh8 Qe6 18.c4 dc4 19.0–0+–) 17.Nh8 Qa1 18.Qd1 Qd1 19.Kd1 Kd6 (19...e5 20.Ke2+–) 20.Nf7 Ke6 21.Ng5 Kf5 22.f4 h6 (22...e6 23.h3 h5 24.Ke2+–) 23.Nf3 Ne4 (23...Nd7 24.Ne5! Ke6 25.Rf1+–) 24.Ke2 e5 (24...e6 25.Ra1+–) 25.Ne5 Bd6 26.Nc6 (26.g4 Ke6+–) 26...Ba3 (26...Bc5 27.d3 Nc3 28.Kd2+–) 27.Ra1 (27.Ra1 Bc5 28.Ra7+–) 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.e3 d6 5.d4 c5 6.bc6 Nc6 7.Nf3 (7.d5 Ne5=) 7...e6 8.Be2 Be7 9.0–0 0–0 10.c4 d5 11.Nbd2 Rc8 12.Qa4 Bd6 (12...dc4 13.Nc4 Qd5 14.Nce5+=) 13.Ba3 Ba3 14.Qa3 dc4 15.Nc4 Ne4 16.Rfc1 Qe7 17.Qe7 Ne7 18.Bd3 Rfd8 19.a4 f6 20.h4 Kf8 21.Kf1 Rd7 22.Na3 a6 (22...Rc3 23.Rc3 Nc3 24.Nb5=) 23.Rc8 (23.Rcb1 Rc3 24.Be4 Be4 25.Rb6 Nd5 26.Rb8 Ke7+=) 23...Nc8 24.Rc1 Ncd6 25.Ke2 (25.Rb1 Nc3 26.Rb6 Na4+=) 25...Ke7= 26.Ne1 Kd8 (26...e5 27.g4 ed4 28.ed4=) 27.f3+= Ng3 28.Kf2 Ngf5 29.h5 h6 (29...g6 30.hg6 hg6 31.g4=) 30.Rb1 Kc7 31.Nec2 e5 32.Rc1 (32.de5 fe5 33.Nb4 a5 34.Rc1 Kb8 35.Nc6 Bc6 36.Rc6 Kb7+=) 32...Kb8 33.de5 fe5 34.Nb4 a5 35.Nc6 Bc6 36.Rc6 Kb7 37.Rc3 Rc7 38.Rb3 Rc1 39.g4 Ne7 40.Nb5 Nb5 41.Rb5 Rc5 42.Rc5 bc5 43.f4 Kc7 44.Be4 Kd6 45.Ke2 Nc8 46.g5 Nb6 47.Bc2 c4 48.Kf3 Kd5 49.f5+/– hg5? 50.f6!+– Ke6 51.fg7 Kf7 52.h6 Nd7 53.Kg4 Nf6 54.Kg5 e4 55.Bb1 1–0. Krivoshapko,Alexander – Mikhailovsky,Viktor, 2011.

4.e3 d6 5.Nf3 e5 6.d4 Nbd7 7.Be2 Be7 8.de5 de5 9.Ne5 Ne5 10.Be5 Bg2 (10...Bb4!? 11.c3 Qd1 (11...Bg2?? 12.Rg1+–) 12.Bd1 Bd6 (12...Bg2 13.Rg1+–) 13.Bd6 cd6+=) 11.Rg1+– Bd5 (11...Bb7 12.Rg7 Nd7 13.Bc3+–) 12.Rg7+– Ne4 (12...Qd7 13.Nc3 0–0–0 14.Qd4+–) 13.Bf3 Nf2?? (better 13...Bd6 14.Qd4 Bc5+–) 14.Qd5 Qd5 15.Bd5 (15.Bd5 0–0–0 16.Bf7+–) 1–0. GuestWXSH – WOWBAYAGDAKO, freechess.org, 2019.

4.e3 d6 5.Nf3 e5 6.d4 e4 7.Nfd2 d5 8.c4 Bd6 (8...a6 9.cd5 Nd5 10.Ne4 Bb4 11.Nec3=) 9.Nc3 0–0 10.cd5 (10.Qb3 c6+=) 10...Nd5 11.Nce4 Nf6 (11...a6!?+=) 12.Nd6+– Qd6 (12...cd6 13.Qb3+–) 13.Qb3+– Re8 14.Nc4 (14.Bc4 Bd5+–) 14...Qe6+– 15.Ne5 (15.f3 Nbd7+–) 15...Qf5?? (better 15...Bd5 16.Qc3 c5+–) 16.Qf7+– (16.Qf7 Kh8 17.Bc4+–) 1–0. GuestHGGR – GuestMTRJ, freechess.org, 2019.

4.e3 d6 5.Nf3 e5 6.Be2 Be7 7.0–0 0–0 8.c4 Nbd7 9.d4 e4 10.Nfd2 d5 (10...a6 11.ba6 Ra6 12.Nc3+=) 11.cd5 Bd5 12.Nc3 Bb7 13.Qc2 Now all is on e4 13...c5 14.bc6 Bc6 The passed pawn on d4 quickly leads to threats 15.Nce4 Rc8 16.Qd3 Ne4 17.Ne4 Nf6 18.Nf6 Bf6 19.e4 Re8 20.e5 Be7 (20...Bg5 21.Bg4 Rc7 22.Bf5+–) 21.Bg4 Rc7 22.Rac1 Bd5 23.Qb5 Rf8?? (better 23...Rc1 24.Rc1 Qa8+–) 24.Rc7+– Qc7 25.Qd5 (25.Qd5 Rd8 26.Qb3+–) 1–0. onur604 (2320) – Immatureguy (2165), lichess.org, 2020.

4.e3 g5 5.Nf3+= g4 (5...h6 6.Bc4+=) 6.Ne5 h5 7.h3 (7.Bc4 d5 8.Bd3 a6+=) 7...Rg8 8.hg4 hg4 9.Rh4 Can g4 get defended? (9.Nc3 d6 10.Nc4 a6=) 9...g3 10.fg3 (10.f3 d6 11.Nd3 a6=) 10...Rg3 11.Qe2 d6 (11...a6 12.Rh8=) 12.Qf2 (12.Nf3=) 12...Rg5 (12...Rg8 13.Nf3 Ne4 14.Qg1=) 13.Nc6 (13.Nf3 Bf3 14.Qf3 Nbd7+–) 13...Qd7 (better 13...Nc6 14.Bf6 ef6 15.bc6 Bc6=+) 14.Bf6+– Rf5 15.Nb8 Rb8 16.Rf4 Rf6 17.Rf6 ef6 18.Qf6 (18.Nc3 f5+=) 18...Qg4 19.c4?? (better 19.d4+=) 19...Bg7–+ 20.Qf2 Ba1 21.Nc3 (21.d4 c5 22.d5 Qe4–+) 21...Bc3 (21...Qg6 22.Qe2–+) 22.dc3 a5 (22...Qg6 23.Qd2–+) 23.a4 (23.Kd2 Qg6 24.Kc1 Be4–+) 23...Qg6 (23...Rd8 24.g3–+) 24.Qh4 (24.Kd2 Rd8–+) 24...Qb1 25.Kf2 Qf5 (25...Qc2 26.Be2 Rd8 27.Qg5–+) 26.Kg1 Qe5 27.Qg4 (27.Qd4 Rd8–+) 27...Qe3 28.Kh1 Kf8 29.Qh3 (29.Qd4 Qh6 30.Kg1–+) 29...Qh3 (29...Qh3 30.Kg1 Qe3 31.Kh2 Ke7 32.g3 Rh8 33.Bh3 Qf2) 0–1. GuestYTSP – GuestCVMG, freechess.org, 2018.

4.e3 g6

5.a4 Bg7 6.c4 d6 7.Nf3 e6 8.Be2 Nbd7 (8...a6 9.0–0=) 9.0–0 0–0 (9...c5 10.d3=) 10.d4 h6 (10...c5 11.bc6 Bc6 12.Nc3=) 11.Nc3 a6 12.Nd2 (12.Qd2 e5+=) 12...Qe7 (12...c5!?=) 13.Bf3+= Bf3 14.Qf3 (worse 14.gf3 Rfc8=+) 14...e5 15.Rfe1 (15.Rfb1 Rfe8+=) 15...Rfe8 16.Nd5 (16.Reb1 a5+=) 16...Nd5= 17.Qd5 ed4 18.Bd4 Bd4 19.Qd4 ab5 (19...Nc5 20.a5 ba5 21.Ra5 ab5 22.Ra8 Ra8 23.cb5=) 20.ab5 Opening the a–file gets White a lot of play 20...Nc5 21.Qd5 Ra1 22.Ra1 Qd7 (22...Qe5 23.Qe5 de5 24.Nf3=) 23.Nf3 Kg7 24.h3 Qe6 25.Qe6 (25.Ra7 Re7 26.Nd4 Qe4+–) 25...fe6+= 26.Ra7 Rc8 27.Nd4 (27.Kf1 Kf6=) 27...Kf6 28.Nc6 g5 (28...Nd3 29.Ra2=) 29.Kf1 (29.Ra3 Ne4+=) 29...d5 (29...Nd3 30.Ra2=) 30.cd5+= ed5 31.Ke2 Ne4 32.Nd4 h5 33.f3 (33.g4 hg4 34.hg4 Nd6+=) 33...Ng3 (33...Nd6 34.g4+=) 34.Kd3 Nf5 35.Nc6 (35.Ra2 Ne7+=) 35...Re8 (35...Nd6 36.Nd4 Nf5=) 36.Rc7 (better 36.e4!? Nd6 37.ed5+=) 36...Re3=+ 37.Kd2 Ra3 (37...Rb3 38.Rc8 Nd6 39.Nd4 Rb2 40.Kc3 Rb5 41.Nb5 Nc8 42.Kd4=+) 38.g4 (38.Rc8 Nd6 39.Rd8 Nc4 40.Kc2 Ke6=) 38...Nh4 39.Nd4 (39.gh5 Nf3 40.Kd1 d4=+) 39...hg4–/+ (39...Nf3?! 40.Nf3 Rf3 41.Rc6 Ke5 42.gh5 Rh3 43.h6=) 40.hg4 Nf3 41.Nf3 Rf3 42.Rc6 Ke5 43.Rb6 The passed pawn on b5 quickly leads to threats 43...Rf4 (43...Rf2!? 44.Kd3 Rb2=) 44.Rg6= Rg4 Black is in command 45.b6 Rg2 46.Kc3 d4 47.Kd3 Rg3 48.Kd2 (48.Kc4!? Rc3 49.Kb4=) 48...Ke4 (48...Kf4 49.Rd6 Ke4 50.Rd8–/+) 49.Re6 (49.b7 Rb3 50.Rg7 Rb2 51.Kc1 Rb4–/+) 49...Kd5 50.b7 Rb3 51.Rg6 (better 51.Re7!?–/+) 51...Rb7–+ 52.Rg5 Kc4 53.Rg7?? (better 53.Ra5–+) 53...Rg7 54.Ke2 (54.Kd1 Kd3 55.Kc1 Kc3 56.Kd1 Re7 57.Kc1 Re1) 54...d3 55.Kf3 (55.Ke3 Re7 56.Kf3 d2 57.Kg2 Rg7 58.Kf3 d1Q 59.Kf4 Qf1 60.Ke5 Re7 61.Kd6 Qf6) 55...d2 56.Ke2 (56.Kf4 d1Q 57.Kf5 Qf3 58.Ke6 Rf7 59.Ke5 Qd5) 56...Kc3 (56...d1Q 57.Kf2 Rf7 58.Kg3 Qg1 59.Kh4 Rh7) 57.Kd1 (57.Kf2 d1Q 58.Ke3 Rf7 59.Ke4 Qd4) 57...Rg1 (57...Rf7 58.Ke2 d1Q 59.Kd1 Re7 60.Kc1 Re1) 58.Ke2 ½–½. BeepBeepImAJeep (2600) – BenDoverMyKnee (2430), lichess.org, 2017.

5.a4 Bg7 6.Nf3 0–0 7.c4 e6 8.Be2 a6 9.0–0 ab5 10.ab5 d5 (10...Ra1 11.Ba1 d5 12.d4=) 11.Ra8+= Ba8 12.d4 Nbd7 13.Nbd2 dc4 (13...c5 14.bc6 Bc6 15.Qb3+=) 14.Nc4 Nd5 (14...c5 15.bc6 Bc6 16.Ba3+–) 15.Nce5 (15.Qc2 Qf6+–) 15...Ne5+= 16.de5 f6 17.Bc4 fe5 18.Be5 Be5 19.Ne5 Qe7 (19...Qg5 20.Nf3 Qg4 21.Nd4+–) 20.Qg4+– Kg7 21.Rd1 Rf6? (21...Rd8 22.Qd4 Rd6 23.Qa1+–) 22.Nc6?? (better 22.Qd4+–) 22...Bc6= 23.bc6 e5?? (better 23...Qb4+=) 24.Bd5 (better 24.Rd5 h5 25.Qd7 Rf7+–) 24...Rd6 25.Be4 (25.Qe4 Qf6+–) 25...Rd1? (25...Qh4 26.Bf3 Qg4 27.Bg4 Rc6+–) 26.Qd1 Qd6 (26...b5+–) 27.Qd6 (27.Qd6 cd6 28.c7 d5 29.Bd5 h5 30.c8Q Kf6 31.Qf8 Kg5 32.f4 Kg4 33.Qc8 Kh4 34.g3) 1–0. BeepBeepImAJeep (2580) – hamidx (1765), lichess.org, 2017.

5.c4 Bg7 6.Nf3 0–0 7.a4 d5 8.Be2 (8.cd5 a6=) 8...Nbd7 (8...c5 9.d4=) 9.d4 (9.cd5 Bd5 10.Nc3 Bb7=) 9...e6 (9...c5 10.0–0=) 10.0–0 c5 11.bc6 Bc6 12.Nc3 dc4 13.Bc4 Re8 (13...Ne4 14.Rc1+=) 14.Nb5 (14.Rc1 Qe7+=) 14...Ne4 (14...Qb8 15.Ba3=) 15.Qc2 Rc8 1–0. DEFFM – GuestSXKX, freechess.org, 2018.

5.Nf3 Bg7

6.a4 d5 7.Nc3=.

6.a4 d6 7.d4 (7.Nc3 Nbd7=) 7...Nbd7 8.Be2 0–0 (8...c5 9.bc6 Bc6 10.Nc3=) 9.0–0 Re8 (9...a5 10.Nc3=) 10.c4 (10.Nc3 a5=) 10...e5 11.de5 (11.Nc3 Ne4=) 11...de5 (11...Ne4 12.Nbd2+=) 12.a5= ba5 13.Ra5 (13.Nc3 c6=) 13...c5 (13...c6!? 14.Ra1 cb5 15.cb5 e4+=) 14.Qa4= e4 (14...Qb6 15.Nc3=) 15.Nfd2 Qc7 (15...Qb6 16.Nb3=) 16.Qa1 (16.Rd1 Red8=) 16...h5 (16...Ne5 17.Be5 Qe5 18.Qe5 Re5 19.Nc3+=) 17.Ra2 (17.Rd1 Rec8+=) 17...Qb8 (17...Ng4 18.Bg4 Bb2 19.Qb2 hg4 20.Nc3+=) 18.Rd1+= Re6 (18...a6 19.Nc3 Ne5 20.ba6 Ra6 21.Ra6 Ba6 22.Nce4 Ne4 23.Ne4 Bc4 24.Bc4 Nc4 25.Bg7 Re4 26.Bf6+/–) 19.Nf1 (19.Nb3 Bf8+/–) 19...Bf8 (19...Ne5 20.Nc3+=) 20.Nbd2 (20.Nc3 Rd6+=) 20...a6 21.Nb3 (21.Bc3 h4=) 21...ab5 (21...Ne5 22.Ra5=) 22.Ra8+= Ba8 23.cb5 Bd5 24.Na5 Ne5 (24...h4 25.h3+=) 25.Qc1 (better is 25.Be5 Qe5 26.Qe5 Re5 27.Bc4+/–) 25...Nd3= 26.Bd3 ed3 27.Rd3 (better is 27.Bf6!? Rf6 28.Rd3=) 27...Qb5–/+ 28.Qc3 c4 29.Rd5 (29.Rd4 Bg7 30.Nd2 Ra6 31.Nac4 Ne4–/+) 29...Qd5 30.Nc4 Rc6 (30...Qd1 31.f3–/+) 31.Nfd2 Bg7 32.Qd4 (32.e4 Qe6 33.Qd4 Qd7–/+) 32...Qe6 (32...Qd4 33.Bd4 Nd5 34.g3–/+) 33.h3 (33.e4!?–/+) 33...Ne8–+ 34.Qd3?? (better is 34.Qf4–+) 34...Bb2 35.Nb2 Nd6 36.Nf3 Qe4 37.Nd4 Rc1–+ 38.Kh2 Qd3 39.Nd3–/+ Ra1 40.Ne5 Ne4–+ 41.f3 Nc3 42.Kg3 Nd5 43.Nc2? Ra2 44.e4 Rc2 45.ed5 Rd2 46.Nd7 Kg7 47.Nb6 f6 48.f4 Kf7 49.Kf3 Ke7 50.g3? Rd3 51.Kg2 Kd6 52.Nc8 Kd7 53.Nb6 Kc7 54.Nc4 Rd5 55.Ne3 Ra5 56.g4 h4 57.Kf3 Kd7 58.Nc4 Rc5 59.Ne3 Ke7 60.Ke4 Kf7 61.Ng2 g5 62.fg5 fg5 63.Ne3 Ra5 64.Nd5 Ke6 65.Nc7 Kd7 66.Nd5 Kd6 67.Nc3 Ke6 68.Ne2 Ra4 69.Nd4 Kf6 70.Kd5 Ra3 71.Ne6 Rh3 72.Nf8 Rd3 73.Ke4 0–1. Klimek,Piotr (1685) – Eggleston,David (2355), Open, Teplice CZE, 2009.

6.Nc3 0–0=.

3.b5 g6

4.a4 Nf6 5.f3 Bg7 6.e4 Nh5 7.d4 d5 8.e5 0–0 9.g3 Bh8 10.f4 c6 11.Be2 c5 12.Bh5 gh5 13.Qh5 cd4 14.Bd4 Nd7 15.Ne2 f6 16.e6 Nc5 17.Nd2 Ne4 18.Ne4 de4 19.0–0 Qd5 20.Qg4 Bg7 21.Be3 Qc4 22.c3 Qe2 23.Qe2 Rad8 24.Rad1 Rc8 25.c4 Rc7 26.Rd7 Rfc8 27.Rfd1 Bf8 28.Rd8 Kg7 29.Rc8 Rc8 30.Rd7 Ba8 31.Bd4 e3 32.Be3 Kg8 33.Ra7 Rd8 34.Ra8 Ra8 35.Bb6 Rc8 36.Qh5 Bg7 37.Qf7 Kh8 38.c5 f5 39.Qe7 Bd4 40.Kg2 1–0. poganinbezdom – gasparetti1, kurnik, 2012.

4.d4 Bg7 5.e3 e6 6.Nf3 Qe7 7.c4 Qb4 8.Bc3 Qe7 9.Bd3 Nf6 10.0–0 0–0 11.Nbd2 d5 12.c5 bc5 13.dc5 a6 14.c6 Bc8 15.a3 ab5 16.Bb4 Qe8 17.Bf8 Qf8 18.Bb5 Ne4 19.Ne4 de4 20.Nd4 Qc5 21.Ra2 Bd4 22.ed4 Qb5 23.Qc2 Nc6 24.Rb1 Qa6 25.Qc5 Bd7 26.h3 Qa4 27.Rb7 Qd4 28.Qd4 Nd4 29.Rc7 Ba4 30.Re7 Bb3 31.Ra1 Bd5 32.a4 Ne2 33.Kh2 Kf8 34.Rc7 Nf4 35.a5 e3 36.fe3 Ng2 37.a6 Ne3 38.a7 Kg7 39.Kg3 Nf5 40.Kf4 Nd6 41.Rd7 Nb5 42.Ra5 Nc3 43.Rc5 Ne2 44.Ke3 Ng1 45.Rcc7 Rf8 46.h4 Nh3 47.Rd6 h6 48.Rb6 g5 49.Rb8 gh4 50.Rf8 Kf8 51.Rd7 Bc6 52.Rc7 Bh1 53.Kd4 Kg7 54.Kc5 Ng5 55.Kb6 h3 56.Rb7 h2 57.a8Q 1–0. trutmo – gasparetti1, kurnik, 2012.

4.Bh8 Nf6 5.f3 Nd5 6.e4 e6 7.ed5 Qe7 8.Qe2 d6 9.de6 fe6 10.Bb2 Nd7 11.d4 0–0–0 12.Nd2 Nf6 13.0–0–0 Nd5 14.c3 Nf4 15.Qf2 Bh6 16.g3 Nd5 17.f4 e5 18.de5 de5 19.Bh3 Kb8 20.fe5 Nc3 21.Bc3 Bh1 22.Ngf3 Bf3 23.Qf3 Qa3 24.Bb2 Qa2 25.Qb3 Bd2 26.Kc2 Qa5 27.Bf1 Bg5 28.Rd8 Bd8 29.Bc4 Qe1 30.e6 Qf2 31.Kb1 Qh2 32.Ba3 Qg1 33.Ka2 Qf2 34.Qb2 Qe3 35.e7 Be7 36.Be7 Qe7 37.Qh8 Kb7 38.Qg8 a6 39.Qd5 Ka7 40.ba6 Qb4 41.Qb7 1–0. poganinbezdom – chorysterol, kurnik, 2012.

3.b5 Nh6

4.Nc3 a6=.

4.e3 a6 5.a4 (5.Nf3 e6=) 5...ab5 (5...f6 6.Nf3=) 6.ab5 e6 (6...Ra1 7.Ba1 f6 8.Nf3=) 7.Ra8+= Ba8 8.c4 Bb4?? (8...Nf5 9.Nf3=) 9.Qa4?? (better 9.Bg7 Rg8 10.Bh6+–) 9...Ba5+= 10.Bg7 Rg8 (10...Bg2 11.Bg2 Qg5 12.Ne2 Qg7 13.Rg1=) 11.Bh6+– d5?? (better 11...Qh4 12.Ne2 Qh6+=) 12.Nf3 (12.cd5 Bd5 13.Nf3 Nd7+–) 12...Rg4 (12...Nd7 13.Bf4+–) 13.Bf4 Rg6 (13...Nd7 14.cd5 Bd5 15.Qc2+–) 14.cd5 Bd5 15.e4 Bb7 16.Ne5 Rf6 (16...Rg7+–) 17.Bg5 Qe7 (17...h6 18.Bh4 h5 19.Be2+–) 18.Ng4 (18.Ng4 Nd7 19.Nf6 Nf6 20.e5+–) 1–0. DEFFM – GuestKPWQ, freechess.org, 2018.

4.e3 e6 5.Nf3 d6 (5...a6 6.c4=) 6.Bc4 c6 (6...Nd7 7.0–0+=) 7.a4 (7.Nc3 cb5 8.Nb5 a6+=) 7...cb5 8.ab5 a6 (8...Nd7 9.0–0+–) 9.0–0 (9.ba6 Na6 10.Bb5 Ke7+–) 9...a5+– 10.Bb3 (10.Nc3 Nd7+–) 10...Bf3 (10...Nd7!?+–) 11.Qf3+– (11.gf3?! Nd7+=) 11...d5 (11...Nd7 12.Nc3+–) 12.c4 (better 12.e4 de4 13.Qe4+–) 12...Nd7? (better 12...dc4 13.Qa8 cb3+–) 13.cd5+– ed5 (13...Nc5 14.Ba2 Rc8 15.d4+–) 14.Bd5 Rc8 15.Bc6 (better 15.Ra4 Qg5 16.Re4 Kd8+–) 15...Qe7 (15...Qg5 16.Qe4 Qe7+–) 16.Ra4 Kd8 (16...f5+–) 17.Rd4 Rc7 (17...f6 18.Nc3 Rc7 19.Nd5+–) 18.Bd7 Rd7 19.Qa8 Kc7 20.Rc1 (20.Rc1 Qc5 21.Qa7 Kc8 22.Rd7 Qc1 23.Bc1 Bd6 24.Qb7) 1–0. GuestKWYZ – GuestJRQL, freechess.org, 2020.

3.c3 a6

4.e3 d6 5.Nf3 h6 6.g3 e6 7.Bg2 Nd7 8.Nh4 d5 9.d4 Qe7 10.Qd3 g6 11.Nf3 Bg7 12.Nbd2 Ngf6 13.h3 Ne4 14.0–0 Nd2 15.Nd2 g5 16.a4 h5 17.Qe2 Bf6 18.Nb3 g4 19.h4 Bh4 20.gh4 Qh4 21.f3 g3 22.Rfd1 Qh2 23.Kf1 h4 24.f4 h3 25.Bf3 g2 26.Bg2 hg2 27.Qg2 Qg2 28.Kg2 0–0–0 29.Rh1 Rdg8 30.Kf2 f6 31.Nd2 e5 32.Nf3 ef4 33.ef4 Nf8 34.Rae1 Kb8 35.Re7 Ng6 36.Rh8 Rh8 37.Rg7 Nf4 38.Bc1 Nd3 39.Ke3 Nc1 40.Rg6 f5 41.Ne5 Rh3 42.Kd2 Na2 43.Nd7 Ka7 44.Ne5 Nc3 45.Rf6 Na4 46.Rf5 c5 47.bc5 bc5 48.dc5 Nc5 49.Rf7 Kb6 50.Kc2 Rb3 51.Rh7 a5 52.Rh4 a4 53.Nf7 a3 54.Nd6 a2 55.Rh1 Ra3 56.Ra1 Kc6 57.Nf5 Bc8 58.Ne7 Kc7 59.Kb2 Ra7 60.Nd5 Kc6 61.Nb4 Kb5 62.Nd5 Be6 63.Nc3 Kc6 64.Kc2 Rg7 65.Kb2 Rg2 0–1. martin78ns – kaczapaya, kurnik, 2012. (=1.c3 b6 2.b4 Bb7 3.Bb2)

4.e3 h5 5.b5 a5 6.a4 h4 7.Ba3 h3 8.f3 hg2 9.Bg2 g6 10.Qe2 Bg7 11.f4 e6 12.Bb7 Ra7 13.Bf3 d5 14.Qd3 Nd7 15.Ne2 Qh4 16.Kd1 Nc5 17.Bc5 bc5 18.Ng3 d4 19.cd4 cd4 20.ed4 Ne7 21.Nc3 Qf6 22.Nge2 Nd5 23.Ne4 Qe7 24.Nc5 Nb4 25.Qb3 Bd4 26.Nd4 Qc5 27.Nc6 Nc6 28.Bc6 Kf8 29.Rc1 Qf2 30.Qc3 Rh2 31.Rh2 Qh2 32.Qc5 Kg7 33.Qa7 Qg1 34.Kc2 Qa7 35.Kb2 Qd4 36.Kb1 Qd2 37.Rc2 Qf4 38.Kb2 Qa4 39.Rc3 Qb4 40.Rb3 Qd4 41.Rc3 e5 42.Kb3 e4 43.Rc4 Qd1 44.Kc3 e3 45.Re4 e2 46.Re2 Qe2 47.Kd4 Qb2 48.Kc5 a4 49.Kc4 a3 50.Bd5 a2 51.Kc5 a1Q 52.Kc6 Qac1 53.Kb7 Qb5 54.Kc8 Qa1 55.Bb7 Qb7 56.Kb7 c5 57.Kc6 Qd1 58.Kc5 g5 59.Kc6 g4 60.Kc5 g3 61.Kc4 g2 62.Kc3 g1R 63.Kc4 Qd2 64.Kc5 Rc1 65.Kb5 Qb2 66.Ka4 Ra1 0–1. martin78ns – kaczapaya, kurnik, 2012.

3.c3 Nc6

4.d4 e6 5.Nd2 Nf6 6.Qc2 Be7 7.e4 d6 8.a3 h6 9.Ne2 (9.Ngf3 a6+=) 9...Qd7 10.f4 Ng4 11.Nf3 Ne3 12.Qd3 Nf1 13.Rf1 a5 14.b5 Na7 15.a4 c6 16.c4 cb5 17.cb5 0–0 18.Rc1 Rac8 19.Kf2 Rc1 20.Rc1 Rc8 21.Nc3 Bf6 22.e5 de5 23.Ne5 Be5 (23...Qd6 24.Kg1=+) 24.fe5= Rc7 25.Ne4 (better 25.Kg1!?=) 25...Rc1–/+ 26.Bc1 Qd5 27.Ke3 Nc8 (27...Qa2 28.Nd6 Qg2 29.Nb7 Qb7 30.Qe4–/+) 28.g3 (28.Qc2!?=+) 28...Ne7 (28...Qa2 29.Nd2 Qa4 30.Qc4–/+) 29.g4 h5 (29...Qa2 30.Qd2 Qa4 31.Nd6–/+) 30.h3 (better 30.Ng5!? Kf8 31.Ba3=) 30...hg4 31.hg4 Ng6 (31...Qa2 32.Qd2 Qa4 33.Nd6–/+) 32.Nd6 Qf3 33.Kd2 Bd5?? (better 33...Qg4 34.Kc2 Bd5=+) 34.Qf3+– Bf3 35.Nc8 Bg4 36.Nb6 Ne7 37.Nc4 Nd5?! (37...Nc8 38.Ba3+–) 38.Na5 (better 38.b6!? Nb4+–) 38...Nb6 39.Ba3 Na4 40.Bc5 Bf3 41.b6 Nc5?? (41...Nb6 42.Bb6 f5+–) 42.dc5 f6 (42...Kf8 43.Ke3 Bg2 44.c6 Bc6 45.Nc6+–) 43.c6 Bc6 44.Nc6 fe5 45.Ne5 g5 46.b7 Kg7 47.b8Q Kf6 48.Qh8 Kf5 (48...Ke7 49.Qg7 Kd6 50.Kd3 Kc5 51.Qb7 g4 52.Kc3 Kd6 53.Kd4 g3 54.Qd7) 49.Nd3 (49.Ke3 g4 50.Qg7 g3 51.Kd4 g2 52.Qg6 Kf4 53.Qg4) 49...g4 (49...e5 50.Qe5 Kg4 51.Nf2 Kh5 52.Ne4 Kg4 53.Qg5 Kf3 54.Qf5 Kg2 55.Qf2 Kh3 56.Qg3) 50.Qe5 Kg6 51.Qe6 (51.Qe6 Kg5 52.Ke3 Kh4 53.Ne5 Kg3 54.Qg4 Kh2 55.Nf3 Kh1 56.Qh3; 51.Qf4 g3 52.Ne5 Kh5 53.Qg4 Kh6 54.Qg6) 1–0. beatmeeasy (1880) – raidem (1865), lichess.org, 2020.

4.e3 a6 5.Nf3 (5.d4 e5=) 5...e6 (5...e5 6.d4=) 6.a3 Be7 7.d4 Nf6 8.Bd3 0–0 9.0–0 g6 (9...Ra7 10.c4+=) 10.Nbd2 d6 11.Qc2 Nd7 12.Rfe1 Bf6 13.e4 Bg7 14.c4 b5 (better is 14...Qf6!?+=) 15.cb5+– ab5 16.Bb5 Ne7 17.Bd3 c5 18.dc5 Bb2 19.Qb2 dc5 20.bc5 (20.Red1 cb4 21.Qb4 Bc6+–) 20...Nc5 21.Bf1 Qd6 22.Rab1 (22.Red1 Rfd8+–) 22...Ra7 (better is 22...Rfb8 23.Qc3 Rc8+–) 23.Qb7?? (better is 23.Qf6+–) 23...Rb7 24.Rb7 Nb7 25.Rb1 Rb8 26.Rb7 (26.Nc4 Qc7 27.e5–+) 26...Rb7 27.Nc4 Qa3 (better is 27...Qd1–+) 28.Na3+– Rb1?? (better is 28...Rd7+–) 29.Nb1 Kg7 30.Nbd2 Nd5 31.ed5 ed5 32.g3 d4 33.Nd4 f6 34.N2f3 Kf7 35.Kg2 f5 36.Bd3 1–0. Fournier,Frederic (1855) – xGerrardx, Active blind, 2011.

4.e3 d5 5.Nf3 e5 (5...a6!?=) 6.b5+/– e4? (better is 6...Na5 7.Ne5 Bd6+=) 7.Nd4?? (better is 7.bc6 Bc6 8.Ne5+–) 7...Nd4= 8.cd4 Nf6 9.h3 Bd6 10.Be2 0–0 11.Ba3 Ba3 12.Na3 Qd6 13.Nc2 c6 14.a4 cb5 15.ab5= Nd7 16.0–0 f5 17.f3 f4 18.fe4 fe3? 19.Ne3?? de4 20.Qb3 Kh8 21.Bg4 Nf6+= 22.Qc2 Qd4–/+ 23.Kh1 Ng4–+ 24.Ng4 Rf1 25.Rf1 Rd8?? 26.Qc7+= Bc8?? 27.Qe7 h6? 28.Ne3?? a6 29.Nf5?? Bf5–/+ 30.Rf5 Qd2 31.ba6 e3 32.a7+/– e2?? 33.Re5 Qc1 34.Kh2 Qf4 35.Kh1 Rd1# 0–1. martin78ns – ostryelk, kurnik, 2012. (=1.c3 b6 2.b4 Bb7 3.Bb2)

4.e3 e6 5.Nf3 d5 6.b5 f6?? (better is 6...Na5=) 7.bc6+– Bc6 8.Qb3 Bb7 9.Bb5 c6 10.Be2 Qd7 11.a4 Bd6 12.Ba3 Ne7 13.Bd6 Qd6 14.d4 0–0–0 (14...c5 15.Bb5 Bc6 16.0–0+–) 15.Nbd2 e5 16.de5 fe5 17.Rb1 d4? 18.a5 dc3 19.Ne4 Qd5 20.Qd5 Nd5 21.ab6 ab6 22.0–0 Kc7 23.Rfc1+– Ra8 24.Nc3 Ra3?? 25.Nd5 Kd6 26.Nb6 Ra2 27.Kf1 h6 28.Rd1 Kc7 29.Ne5 Re8 30.Nf3 Rf8 31.Nc4 c5 32.Nce5 g5 33.Rdc1 g4 34.Ng4 h5 35.Nge5 Bf3 36.Bf3 Kd6 37.Ng6 Rf6 38.Nf4 h4 39.h3 Ke5 40.Rc5 Kd6 41.Rcc1 Ke5 42.Kg1 Ra4 43.Nd3 Kf5+– 44.Rc5 Kg6 45.Ne5 Kh7 46.Ng4 Rg6 47.Rc7 Kh8 48.Rb8 Rg8 49.Rg8 Kg8+– 50.Kh2 Kf8 51.Nf6 Ra2 52.Ng4 Ke8?? 53.Rc4 Kf7 54.Rd4 Kg6 55.Ne5 Kf5 56.Ng4 Ra3?? 57.Be4 (57.Be4 Ke6 58.Bd5 Ke7 59.Nh6+–; 57.Rd6 Ra4 58.Nh6 Ke5 59.Nf7 Kf5 60.Bh5 Rg4 61.Bg4 Ke4 62.Rd4#) 1–0. martin78ns – agimi66, kurnik, 2012.

3.c3 e6

4.a4 a5 5.b5+=.

4.a4 d6 5.e3 Nd7 6.Nf3 Ne7 7.Be2 e5 8.h3 (8.0–0 d5=) 8...g6 (8...e4 9.Nh2=) 9.d3 Bg7 10.e4 0–0 11.0–0 a5 12.b5 c6 13.bc6 Bc6 14.Ba3 Nf6 (14...Nc5 15.Bc5 bc5 16.Qc2+=) 15.Qd2 (15.Nbd2 Qd7 16.Qb1 Nh5+= (worse is 16...Ba4 17.Nc4+/–)) 15...Re8 16.c4 d5 (better is 16...Ba4 17.Bd6 Qd6 18.Ra4 Nd7=) 17.cd5+/– (17.Ne5?! Ne4 18.Qf4 Be5 19.Qe5 Nf5+=) 17...Bd7 18.Ne5 (18.Bb2 Nc8+–) 18...Nc8 (18...Ne4!? 19.de4 Be5+–) 19.Nd7+– Qd7 (19...Nd7 20.Nc3 Nc5 21.Qc2+–) 20.Bb2 Nd6 (20...Na7 21.Bd4+–) 21.Bf3 Nb7 22.e5 Nd5+/– 23.e6 Re6 24.Bg7 Kg7 25.Qb2 Kg8 26.Nd2 Rae8 27.Ne4 Nb4?? 28.Nf6+– Rf6 29.Qf6 Nd3 30.Rfd1 Nbc5 31.Bg4 Qe7 32.Qe7 Re7+= 33.Rab1 Ne5 34.Rb6 Ng4 35.h4?? Nf2?? 36.Kf2+/– Na4 37.Ra6 Nc3 38.Rd3 Ne4 39.Kf3 f5 40.Rd8 Kg7 41.Ra5 h5 42.Raa8 Nf6 43.Rd6 Ng4 44.Raa6 Ne5 45.Kf4 Kf7 46.Rf6 Kg7 47.Rfd6 Kf7 48.g3 Kg7 49.Rd5 Nc4 50.Ra4?? Re4–/+ 51.Kg5?? Nb6 52.Ra7+– Kf8 53.Rd8 Re8 54.Re8 Ke8 55.Kg6 Nd5 56.Kf5 Ne7 57.Kg5 Nc6 58.Ra8 Kf7 59.Kh5 Kg7 60.g4 Ne5 61.g5 Nf3 62.Kg4 1–0. martin78ns – omas, kurnik, 2011.

4.Qc1 Qe7 5.Qc2 d5 (5...Nf6 6.Nf3+=) 6.e3 Nd7 7.Nf3 0–0–0 8.a4 h5 (8...a6!?=) 9.a5+/– h4 10.ab6 ab6 11.Na3 Nb8 (11...e5 12.Be2+=) 12.Nb5+/– c6 13.Nbd4 e5 14.Nb3 (14.Nf5 Qf6 15.c4 Rh5 16.N5h4 Rh4 17.Be5 Qe7 18.Bb8 Kb8 19.Nh4 Qh4+/–) 14...g5 (14...h3!?+=) 15.Qf5+/– Nd7 16.Ba6 (16.Qg5!? e4 17.Qe7 Be7 18.Nfd4+/–) 16...f6 (16...e4!? 17.b5 Ba6 (17...ef3 18.Bb7 Kb7 19.bc6 Kc6 20.Nd4 Kc7 21.Qd5+/–) 18.bc6 Nh6 19.cd7 Rd7+=) 17.Bb7 Kb7 18.Qc2 (18.b5 c5 19.0–0 c4=) 18...Nh6 (18...h3 19.g3=) 19.c4 d4 (19...Qb4 20.cd5 cd5 21.0–0+=) 20.ed4 (20.b5 Qh7 21.bc6 Kc6 22.Qh7 Rh7 23.ed4 Nf7+–) 20...ed4 21.Kf1 Ne5 22.Nbd4 Nf3 23.Nf3 Qb4? 24.Bf6+– Bc5 25.Bh8 Rh8 26.Rb1 Qa3 27.d4 Bb4 28.c5 g4 29.Nh4 Nf7 30.Ng6 Rh6 31.Nf4 Ng5 32.cb6 Rd6 33.d5! Bc5 34.dc6 Rc6 35.Qb3 Qa6 36.Kg1 Bd6 37.Nd5 Qe2 38.h3 Rc2?? 39.Qe3 g3 40.Qe2 Re2 41.fg3 Bg3 42.Kf1 Ne4?? 43.Ke2+– Nc3 (43...Nc3 44.Nc3 Be5+–). martin78ns – stark12, kurnik, 2012.

4.e3 f5 5.Nf3 Nf6 6.d4 Be7 7.Nbd2 0–0 8.a4 Nc6 9.Be2 a5 10.b5 Na7 11.0–0 Nc8 12.c4 Nd6 13.Nb3 Nde4 14.Nfd2 h6 15.Ne4 Ne4 16.Bf3 g5 (16...Bd6 17.c5 bc5 18.Be4 Be4 19.dc5+=) 17.h3+= Bf6 18.Nd2 (18.Rc1 Qe7+=) 18...Qe7 (better is 18...Nd2!? 19.Qd2 Bf3 20.gf3 Qe7=) 19.Be4 fe4 20.f4 (20.Ba3 d6+=) 20...g4 (better is 20...Bg7!?=) 21.Qg4+/– Kh7 22.Qh5 Bh4 23.g4 Rg8 24.Kh2 Raf8 25.d5 ed5+/– 26.cd5 c6 27.dc6 dc6 28.Nc4 cb5 29.Qb5 Bc8? 30.Ne5 Qd8 31.Rfd1 Qc7 32.Rac1 Qb8 33.Rc6 Rd8 34.Rd8 Rd8 35.Rc2 Qd6 36.Nc6 Bd7? 37.Qe5?? Bc6?? 38.Qg7# 1–0. poganinbezdom – ibrah85, kurnik, 2012. (=1.c3 b6 2.b4 Bb7 3.Bb2)

4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.d4 d5 8.a3 Nbd7 9.Nbd2 c5 10.bc5 bc5 11.dc5 Nc5 12.0–0 a5 13.Nd4 Rb8 14.N2b3 Nb3 15.Qb3 Qd6 16.Qc2 Nd7 17.Nb5 Qc6 18.Nd4 Qc7 19.Nb5 Qd8 20.Nd4 e5 21.Nf3 f6 22.c4 Rc8 23.Qb3 Ba8 24.cd5 Kh8 25.e4 Nc5 26.Qe3 Na4 27.Bc1 Bc5 28.Qb3 Nb6 29.Be3 Be3 30.Qe3 Nc4 31.Bc4 Rc4 32.h3 Qd6 33.Nh4 Rfc8 34.Nf5 Qd7 35.Qg3 Re4 36.d6 Qf5 37.Rfd1 Rd8 38.Rac1 Qd7 39.Rc7 g6 40.Rd7 Rd7 41.Qb3 Kg7 42.Qe6 Bc6 43.Rc1 Ba4 44.Rc8 Kh6 45.Rc7 Rg7 46.d7 Bd7 47.Rd7 Rd7 48.Qd7 Rd4 49.Qb5 1–0. martin78ns – magnacharta (1610), kurnik, 2012.

4.e3 Nf6 5.Nf3 Be7 6.g3 0–0 7.Bg2 d5 8.h3 c5 9.bc5 bc5 10.0–0 Nc6 11.d4 cd4 12.cd4 Ne4 13.a4 Na5 14.Nc3 Nc3 15.Bc3 Nc4 16.Nd2 Nd6 17.Nf3 Rc8 18.Bb4 a5 19.Ba3 Nc4 20.Be7 Qe7 21.Qb3 Ba6 22.Rfc1 Rb8 23.Qa2 Rb4 24.Rab1 Rfb8 25.Ne5 f6 26.Nc6 Qd6 27.Nb8 Rb8 28.Rb8 Qb8 29.Bf1 Qb4 30.Rb1 Qf8 31.Kg2 h6 32.Qc2 Na3 33.Qb2 Nb1 34.Qb1 Bf1 35.Qf1 Qb4 36.Qa1 Kh7 37.Qa2 h5 38.Kf3 Kg6 39.g4 hg4 40.hg4 f5 41.Qc2 Kf6 42.gf5 ef5 43.Kf4 g5 44.Kf3 g4 45.Kf4 Qd6 0–1. martin78ns – magnacharta, kurnik, 2012.

4.e3 Nf6 5.Nf3 Be7 6.g3 d6 7.Bg2 c6 8.0–0 Nbd7 9.a3 Qc7 10.d3 h5 11.Nbd2 e5 12.e4 Nf8 13.Nc4 Ng6 14.Bc1 Ng4 15.Qe2 0–0–0 16.Ne3 Qd7 17.a4 h4 18.Bh3 hg3 19.Bg4 f5 20.Bf5 Qf5 21.Nf5 gh2 22.Nh2 Bf6 23.a5 Nf4 24.Qf3 Rh3 25.Qg4 Rdh8 26.Bf4 ef4 27.Nd6 Kb8 28.Qg2 f3 29.Nf3 Bc3 30.Rac1 Bb4 31.ab6 Bd6 32.ba7 Ka8 33.e5 Bc7 34.d4 c5 35.Qg4 Bf3 36.Qh3 Rh3 37.Rc5 Rh1 0–1. martin78ns – andrzejsul, kurnik, 2012.

4.e3 g6 5.Nf3 Bg7 (5...Qf6 6.d4=) 6.d4 Ne7 7.Bd3 0–0 8.Nbd2 c6 9.a3 d5 10.0–0 Nd7 11.Qc2 Kh8 12.Rac1 f6 13.Rfe1 (13.c4 a5+=) 13...e5 14.de5 fe5 15.Be2 Qc7 (15...a5 16.c4=) 16.c4+= d4? (better is 16...a5+=) 17.ed4+– ed4 18.Nd4 c5?? (18...Qf4 19.Bf3 Be5 20.Re5 Ne5+–) 19.bc5 Nc5+/– 20.N4f3 Bb2 21.Qb2 (21.Qb2 Kg8 22.Qe5 Qe5 23.Ne5+/–) 1–0. Fournier,Frederic (1970) – Salsero77 (2000), Active Owl21.com, 2008.

4.f3 a6 5.e4 c5 6.a3 cb4 7.ab4 Nf6 8.Na3 Be7 9.Nh3 0–0 10.Be2 Nc6 11.0–0 Rc8 12.Nc2 Ne5 (12...a5 13.b5 Ne5 14.d3=) 13.d4 (13.Ba6!? Ba6 14.Ra6+=) 13...Nc4= 14.Rb1 (14.Bc1 d5 15.e5 Nd7=) 14...Qc7 (14...Nb2 15.Rb2 Rc3–/+) 15.Na3? (better is 15.Bc4!? Qc4 16.Ne3+=) 15...Nb2 16.Rb2 Qc3 17.Ra2 (better is 17.Rb3!? Qc7 18.Bd3–/+) 17...Bb4 18.Nc4? (18.Nc2 Be7 19.Qb1–+) 18...Rc4 19.Bc4 Qc4 20.Rc2 Qb5 (20...Bc3 21.Nf2 Qd4 22.Qc1–+) 21.Qb1 a5 22.Nf2 Ba6 23.Rfc1 Qh5 24.Rc7 (24.Qb2 Ra8–+) 24...Bd6 25.Ra7 Qh2# 0–1. jarmuta – lican, kurnik, 2012.

4.f3 Nf6 5.e4 d6 (5...e5 6.a3=) 6.Bd3 (6.d4 Be7=) 6...Be7 7.Bc2 Nbd7 8.d4 c5 9.bc5 bc5 10.Ne2 cd4 11.cd4 Rc8 12.Nd2 Qc7 13.0–0?? (better is 13.Bd3=) 13...Qc2–+ 14.Ba3 Qd1 (14...0–0 15.Nb3–+) 15.Rfd1 0–0 16.Rab1 Ba6 17.Nf4 e5 18.de5 de5 19.Be7–/+ ef4 20.Bf8 Nf8 21.Nb3 Ne6 22.Rbc1 Rf8 0–1. Fournier,Frederic (1825) – spaingoujom (1965), Active (1/0), 2005.

4.Nf3 Nf6 5.Na3 d5 6.Nc2 Nbd7 7.e3 g6 8.h4 Bg7 9.Be2 0–0 10.Nfd4 e5 11.Nf3 h5 12.Nh2 d4 13.cd4 ed4 14.Bd4 c5 15.bc5 bc5 (worse is 15...Nc5 16.0–0+=) 16.Bc3 Bg2 17.Rg1 Be4 18.Bf3 Bf3 19.Nf3 Re8 20.Na3 Ng4 21.Bg7 Kg7 22.Nc4 Nb6 23.Qc2 f6 24.Nb2 Qd5 25.Rg3 Rac8 Black prepares c4 26.Nd3 The isolani on c5 becomes a target 26...Qe4 27.Rc1 c4 28.Nf4?? Qf4–+ 0–1. swislina – gankov, kurnik, 2012.

3.c3 f6

4.e3 e5 5.Nf3 d5 6.g3 Bd6 7.Bg2 Ne7 8.Qe2 Nd7 9.a3 0–0 10.0–0 c5 11.bc5 bc5 12.d4 cd4 13.ed4 e4 14.Nfd2 f5 15.Qh5 g6 16.Qe2 f4 17.g4 f3 18.Bf3 ef3 19.Nf3 Rf4 20.Ng5 Nf8 21.Nd2 Bc8 22.f3 Rb8 23.Bc1 Rf6 24.Rf2 Qc7 25.Rg2 h6 26.Nh3 g5 27.Nf1 Qc3 28.Bb2 Rb2 29.Qb2 Qb2 30.Rb2 Ba6 31.Rf2 Nc6 32.Nd2 Nd4 33.Rb1 Nfe6 34.a4 Kg7 35.Kg2 Ne2 36.Nb3 Nc3 37.Rc1 Na4 38.Rc6 Bc4 39.Na5 Bc5 40.Nc4 dc4 41.Rc2 Nf4 42.Nf4 Rc6 43.Rc4 gf4 44.Ra4 Bb6 45.Re4 Rf6 46.Kh3 Kg6 47.Re7 Be3 48.Rb7 Rb6 49.Rd7 Rb2 50.Rd6 Kg7 51.Rd7 Kf8 52.Rd8 Ke7 53.Rh8 Rb6 54.Rh7 Kd6 55.Ra7 Bg1 56.Rh7 Kc5 57.Rf7 Be3 58.Rf5 Kd4 59.Ra5 Kd3 60.Ra3 Ke2 0–1. martin78ns – iulian59, kurnik, 2012. (=1.c3 b6 2.b4 Bb7 3.Bb2)

4.e3 e6 5.Nf3 d5 6.Be2 (6.Nd4 e5 7.Ne6 Qe7 8.Nf8 Qf8+=) 6...Nc6 (6...c5 7.bc5 bc5 8.c4=) 7.b5 Nce7 8.a4 Qd7 9.Ba3 0–0–0 (9...a6 10.d4+=) 10.Bb4 (10.a5 Kb8+/–) 10...g5 (10...c5 11.bc6 Nc6 12.Bb5+=) 11.a5+/– h5 12.ab6 cb6 (better is 12...ab6!? 13.d4 Nh6+/–) 13.Ra7+– Kb8 14.Ra1 Qc7 15.Qa4 (15.Nd4 Qd7+–) 15...g4 (15...Kc8 16.0–0+–) 16.Nd4 e5?? (16...Qd7+–) 17.Qa7 (17.Ne6 Qd7 18.Qa7 Kc8 19.Qb6 Ng6 20.Bf8 Nf8 21.Nf8 Qd6 22.Qd6 Rd6+–) 17...Kc8 18.Ne6 Qd7 19.Nd8 Qd8 20.Qa3 Qc7 21.d4 ed4 22.cd4 Nf5 23.Bf8 Nge7 24.Be7 Ne7 25.Nd2 Nf5 26.Nb3 Kb8 27.Qa7 Kc8 28.Qa3 Kd8?? 29.Qb4 Nd6 30.Rc1 Nc4 31.Bc4 dc4 32.Rc4 Qf7 33.Qd6 Qd7 34.Qf6 Qe7 35.Qh8 Kd7 36.Qh5 1–0. martin78ns – agimi66, kurnik, 2012.

3.c3 Nf6

4.a4 d6 5.e3 e5 6.a5 Be7 7.ab6 cb6 8.Nf3 0–0 9.d3 e4 10.Nd4 Nc6 11.Nf5 Ne5 12.Ne7 Qe7 13.d4 Nd3 14.Bd3 ed3 15.Qd3 Bg2 16.Rg1 Be4 17.Qd2 Nh5 (17...Rfc8 18.b5–/+) 18.Na3 (better is 18.Qe2!? Bb1 19.Rb1=) 18...Qh4–/+ 19.0–0–0 (19.c4!?–/+) 19...Bf3 20.Rde1 a5 21.ba5 ba5 22.Nc4 a4 23.Ba3–/+ d5 24.Ne5 Be4?? 25.Bf8+/– Kf8 26.Qe2 Rb8?? 27.Nd7+– Ke7 28.Nb8 Kd8 29.Qg4 Qg4 30.Rg4 f5 31.Rh4 g6 32.Nc6 Kd7 33.Ne5 Ke6 34.Kb2 Kf6 35.Ka3 Bc2 36.f3 Kg5 37.Rh5! Kh5 38.Re2 Bb3 39.Rf2 Kg5 40.f4 Kf6 41.Nc6 1–0. qbakrak – andrzejek054, kurnik, 2012.

4.e3 e6 5.Nf3 Be7 6.g3 d5 7.Bg2 Nbd7 8.Qc2 c5 9.bc5 Bc5 10.d4 Bd6 11.Ba3 Qc7 12.Bd6 Qd6 13.a4 Rc8 14.0–0 h5 (14...0–0 15.a5+=) 15.Nbd2= Ne4 16.Ne4 de4 17.Nd2 f5 18.c4 (18.a5 h4=) 18...h4 (18...e5 19.de5 Ne5 20.a5=) 19.Qb3 (19.a5 e5 20.ab6 ab6=) 19...hg3 20.fg3 Nf6 21.Rac1 Ng4 Exerts pressure on the backward pawn 22.h3?? Qg3?? 23.hg4= Qh2 24.Kf2 Qh4 25.Ke2 Qg4 26.Kf2 Rh2 27.Rg1 f4 28.Qb5 Bc6 29.Qc6?? Rc6–+ 30.d5 (30.d5 f3 31.Ke1 Rg2 32.Rf1 Re2 33.Kd1 Qg2 34.Rc2 Rd2 35.Rd2 Qf1 36.Kc2 Qc4 37.Kb2 Qb4 38.Ka2 Qd2 39.Kb3 Rc3 40.Kb4 Qb2#). martin78ns – p3ps1, kurnik, 2012. (=1.c3 b6 2.b4 Bb7 3.Bb2)

4.e3 g6 5.Nf3 Bg7 6.g3 e6 7.Bg2 Qe7 8.Nh4 Nc6 9.b5 Na5 10.Bb7 Nb7 11.a4 Bh6 (11...0–0!?+=) 12.Qf3= d5 13.c4 e5 (13...Bg7 14.cd5 ed5 15.0–0=) 14.cd5+= Bg7 15.d6 (better is 15.Nc3+/–) 15...Qd6?? (better is 15...cd6 16.e4 Nc5=) 16.Qb7+– 0–0 17.Nf3 (17.Ba3 c5 18.bc6 Qd5+–) 17...e4 18.Nd4 c5 19.bc6 Rfb8 20.Qa6 Qb4 21.Bc3 Qc4 22.Qc4 a6 23.0–0 b5 24.ab5 ab5 25.Nb5 Ra1 26.Ba1 Rc8 27.c7 Nd7 28.Bg7 Kg7 29.Nd6 Nb6 30.Qc6 Rc7+– 31.Qc7 Na4 32.Qf7 Kh6 33.Ne4 Nb2 34.d4 Nd3 35.d5 g5 36.d6 g4 37.d7 Nf2 38.d8Q Nh3 39.Kg2 Ng1 40.Qg5# (40.Qdf6#) 1–0. martin78ns – guriizi, kurnik, 2012.

4.e3 g6 5.Nf3 Bg7 6.g3 e6 7.Bg2 Qe7 8.Nh4 d5 9.Qe2 Nbd7 10.a3 h6 11.0–0 g5 12.Nf3 Ne4 (12...g4 13.Nh4+=) 13.d3= Nd6 (13...Nef6 14.Nd4=) 14.Nd4 (14.c4 Bb2 15.Qb2 0–0–0 16.cd5 Bd5+=) 14...f5 (14...e5 15.Nb3+=) 15.b5 0–0–0 16.a4 e5 17.Nb3 White prepares the advance a5 17...h5 18.a5 (18.Ba3 h4=) 18...Nb5+= 19.ab6 ab6 20.d4 (20.e4 Qf7 21.N1d2 de4 22.de4 Nd6=) 20...Nd6 21.de5 Ne5–/+ 22.Ba3 h4 23.Bb4 hg3 24.fg3 Nec4 25.Rf5 c5 26.Nc5 Nf5 27.Ne4 Qd7 28.Ng5 Nfe3 29.Na3 Ng2 30.Kg2 d4 31.Kg1 Na3 32.Ra3 dc3 33.Bc3 Bc3 34.Rc3 Kb8 35.Qe5 Ka7 36.Ra3 Ba6 37.Ra1 Rde8 38.Qc3 Rhg8 39.Nf3 Qb5 40.Nd4?? Qc5–+ 0–1. martin78ns – guriizi, kurnik, 2012.

3.c3 g6

4.c4 f6 5.Qc2 Bg7 6.b5 e6 7.a4 Qe7 8.Nf3 Bf3 9.gf3 c6 10.Bg2 f5 11.bc6 (11.a5!? ba5 12.f4+=) 11...Nc6+= 12.f4 Nf6 13.Na3 Ne4 14.Nb5 d6? (better is 14...Bb2 15.Qb2 0–0=) 15.d3+– a6 16.Na3 (16.de4 ab5 17.ef5 Nb4+–) 16...0–0? (better is 16...d5 17.Bg7 Qg7+=) 17.de4+– Nd4 18.Bd4 Bd4 19.Rd1 e5? (19...Bc5 20.Nb1 Rac8 21.ef5 Rf5 22.Qe4+–) 20.fe5 Qe5 21.0–0 Rae8 22.ef5 Rf5 23.e3 Bc5 24.f4 Qe3–/+ 25.Kh1 Qa3 26.Bd5 Kg7 27.Rd3 Qb4 28.Qc3 Qc3–+ 29.Rc3 Bb4 30.Rb3–/+ a5 31.Kg2 Re2 32.Kg3 Bc5 33.h4 h6 34.Rff3 Re1 35.Kg2 Rg1 36.Kh3 h5 37.Be4+= Rf6 38.f5? g5?? 39.hg5= Rg5 40.Rg3 Rg3 41.Rg3 Kf7 42.Rg5 Rh6 43.Kh4 Bf2 44.Kh3 Be3 45.Rg3 Bf4 46.Rf3 Be5 47.Kh4 Kf6 48.Rb3 Bd4 49.Rd3 Bc5 50.Bd5 Ke5?? 51.Rf3 Kf6 52.Rf4 Be3 53.Rf3= Bg5 54.Kh3 h4 55.Be6 Bd2 0–1. martin78ns – analucky, kurnik, 2011. (=1.c3 b6 2.b4 Bb7 3.Bb2)

4.e3 Bg7 5.Nf3 e5 6.Be2 e4 7.Nd4 d5 8.a3 Qe7 9.d3 Nd7 10.de4 de4 11.0–0 0–0–0 (11...Ngf6 12.Qb3=) 12.a4 (12.Qa4 Kb8+=) 12...Ne5 (12...c5!? 13.bc5 bc5+=) 13.a5+/– Nc6 (13...c5 14.ab6 ab6 15.Qc2+/–) 14.ab6 Nd4 (14...ab6 15.Qc2+/–) 15.cd4+– ab6 16.Ba6 (16.Qa4 Nf6+–) 16...Qb4 17.Bb7 Kb7 18.Ba3 (18.Qc2 Qd6+–) 18...Qb5 19.Nc3 Qd7 (19...Qe8 20.Qc2 Nf6 21.Rfc1+–) 20.Qe2 (20.Ne4!? f5 21.Nc3+–) 20...Nf6+/– 21.Bc1 Qc6 22.Qb2 Nd5 23.Nd5 Qd5= 24.Qb4 f5 25.h3 Bf8 26.Qb2 c5 27.dc5 Bc5 28.Qb5 Qc6?? 29.Qa6 Kc7+= 30.Qc4 b5= 31.Qf7 Rd7 32.Ra7?? Kc8 33.Rd7= Qd7 34.Qb3 Qc6 35.Bb2 Rd8+/– 36.Ra1 Rd3 37.Qg8+/– Kb7 38.Qf7?? Qc7?? 39.Qe6?? Rd2?? 40.Qa6 Kb8 41.Qa8# 1–0. martin78ns – analucky, kurnik, 2011.

4.e4 Be4!? 5.c4 Nf6–/+.

4.e4 Bg7 5.f3 Nh6 6.Qc2 0–0 7.h3 (7.d4 d5=) 7...f5 8.ef5 (8.d4 e5 9.Bd3 fe4 10.Be4 Be4 11.Qe4 d5–/+) 8...Nf5–/+ 9.c4 Bb2 10.Qb2 Rf6 (10...e5!? 11.Ne2 Qh4 12.Kd1 Nc6–/+) 11.Ne2+= Re6 12.Nbc3 Ng3 13.Rg1 Qf8 14.0–0–0 Nf5 (14...Ne2 15.Be2 Nc6 16.c5=) 15.Nf4 Rf6 16.Nfd5+= Bd5 17.Nd5 Rd6? 18.Nc7+– Nc6 19.Nd5?? a5 20.b5 Nb4+= 21.a3 Nd5–/+ 22.cd5 Rd5 23.Bc4 Rc8–+ 24.Kb1?? Rc4 25.Qb3 Rcc5 26.Rge1 Rb5 27.Qb5 Rb5 (27...Rb5 28.Kc2 Nd4 29.Kd3 Rb3 30.Kc4 Qf5 31.Kd4 Rd3 32.Kc4 b5#) 0–1. martin78ns – dorecho, kurnik, 2012.

3.Nc3 e6

4.Nb1 Ne7 (4...Nf6 5.a3=+) 5.e3 Nf5 6.d3 (better 6.a3!?=+) 6...Bb4–/+ 7.Nd2 0–0 8.Qg4 Bd2 9.Kd2 f6 10.Nf3 Bf3 11.gf3 Nc6 12.Rg1 Qe7 13.Bh3 Qb4 (13...Rae8 14.Bg2–/+) 14.Bc3 (14.Qb4 Nb4 15.Bf5 ef5=) 14...Qg4 (14...Qc5 15.Rab1–/+) 15.Rg4 (15.fg4 Nh4 16.Ke2 a5=+) 15...Ne5–/+ 16.Be5 fe5 17.Rag1 g6 18.e4 (better 18.Bg2!?–/+) 18...Nd4–+ 19.Rg5? (better 19.Bg2–+) 19...Nf3 20.Ke2 Ng5 21.Rg5 Rf7 22.Re5 (22.Rg2 Raf8–+) 22…Raf8 (22...Raf8 23.Rg5 Rf2 24.Ke1 Rh2–+) 0–1. aravind555 (1710) – A_A_Mokin (1735), lichess.org, 2019.

4.Nf3 Bb4–/+ 5.e3 Qf6 6.a3 Bd6 7.Rb1 Be5?? (7...Bf3 8.Qf3 Qf3 9.gf3+=) 8.Bc4?? (better is 8.Ne5 Qe5 9.Nb5+–) 8...Nc6 9.Ne4 Qf5 10.Bd3+/– Qg4 11.0–0?? Bb2+= 12.Rb2 Qf5?? 13.Nd6!! cd6 14.Bf5 ef5 15.d4 Ba6 16.Re1 Nf6 17.Qc1 Ne4 18.d5 Na5 19.c3 Nc4 20.Rb1 0–0 21.Nd4 Ncd2? 22.Ra1 Bc4 23.Nf5 Nb3 24.Qc2 Na1 25.Ra1 Nc5 26.Ne7 Kh8 27.Nf5?? Nb3?? 28.Rd1 a5 29.Nd6 a4 30.Nc4 b5 31.Nb6 Ra6 32.Nd7 Rd8 33.Nc5! Nc5 34.Qb2 Nb3 35.e4 Rad6 36.Qe2 Re8 37.f3 f6 38.Qb5 Ra8 39.Qb7 Rad8 40.Qb4 Ra6 41.d6 h5 42.c4 g6 43.c5 g5 44.Qb5 White intends d7 44...Rda8 45.d7 Re6 46.d8Q Rd8 47.Rd8 Kh7 48.Qd7 Kg6 49.Rg8 (49.Rg8 Kh6 50.Qg7#) 1–0. gordiemac – war_child, ChessWorld.net, 2012.

3.Nc3 Nf6

4.b5 e6 5.e3 d5 6.d4 Bd6 7.Nf3 0–0 8.Be2 c6 9.a4 c5 10.0–0 c4 11.Nd2 a6 12.f3 ab5 13.ab5 Ra1 14.Qa1 Qd7 15.Qa7 Bc8 (15...Qc7!? 16.f4 Nbd7+=) 16.Qb6 Bc7 17.Qa7?? (better is 17.Qc5 Bd6 18.Qb6=) 17...Qd6 (better is 17...Bh2 18.Kh2 Qa7–+) 18.Ra1?? (better is 18.f4 Qd7 19.Ra1+/–) 18...Qh2–+ 19.Kf2 (19.Kf1 Bg3 20.Bc4 Qh1 21.Ke2 Qg2 22.Kd3 dc4 23.Nc4 Qf3 24.Ba3–+) 19...Bg3 20.Kf1 Qh1# 0–1. captainevans – hetman1, kurnik, 2012.

4.e3 g6 5.a3 Bg7 6.d4 0–0 7.Nf3 d6 8.Be2 e5 9.d5 (9.de5 de5 10.Ne5 Bg2+=) 9...c6 (9...e4 10.Nd4+=) 10.e4 cd5 11.ed5 e4 12.Ng1 (12.Nd4 Nd5 13.Nd5 Bd5+=) 12...Nbd7 (12...Nd5 13.Nd5 Bb2 14.Ra2–+) 13.Bc4 (13.Ra2 a5 14.b5 Rc8–/+) 13...a6 (13...Rc8!? 14.Bb3 Nd5 15.Bd5 Bd5 16.Qd5 Bc3 17.Bc3 Rc3–/+) 14.Nge2+= b5 15.Bb3 a5 (15...Nb6 16.Ra2+=) 16.Ba2 (16.Nb5!? ab4 17.ab4+=) 16...ab4 17.Nb5? (better is 17.ab4 Nb6 18.Nb5=) 17...ba3–/+ 18.Na3 (18.Bd4 Ne5 19.Nec3 Qd7–/+) 18...Qa5 (better is 18...Ra3 19.Ba3 Qa5 20.Qd2 Qa3–+) 19.Nc3?? (better is 19.Kf1–/+) 19...Nd5–+ 20.0–0 Nc3 (worse is 20...Bc3 21.Bd5 Bb2 22.Bb7 Ba1 23.Ba8 Ra8 24.Qd6 Qa3 25.Qd7–+) 21.Qd6 Nc5 22.Nc4 Qb4 23.Ba3 Ra3 24.Na3 Qa3 25.Bf7!+– Rf7 26.Ra3 Nd7 27.Ra7 Be5?? 28.Qb4 Bd5 29.Rfa1 e3? 30.f3 e2 31.Kf2 Kg7 32.g3?? Nd1–/+ 33.Ke2 Ba1?? 34.Ra1+– (34.Ra1 Bf3 35.Ke1+–; 34.Kd1?! Bf3 35.Kd2 Bf6+=) 1–0. cogit – norocosux, kurnik, 2012.

3.c4 a5

4.a3 ab4 5.ab4 Ra1 6.Ba1 Nc6 7.Qb3 Nf6 8.e3 g6 9.d4 Bg7 10.Nf3 0–0 11.Bd3 d6 12.Nbd2 e6 13.0–0 Na7 14.Bb2 c5 15.bc5 dc5 16.dc5 Nc6 17.cb6 Na5 18.Qc2 Qb6 19.Rc1 Qc7 20.Be5 Qc5 21.Qa4 Bc6 22.Qa1 Bf3 23.Nf3 Nb3 24.Bd4 Qe7 25.Qb2 Nc1 26.Qc1 Nd7 27.Qc3 Bd4 28.ed4 Rc8 29.c5 Nf6 30.Ne5 Nd5 31.Qb3 f6 32.Nf3 Kg7 33.Bc4 Nf4 34.g3 Nd5 35.Bd5 ed5 36.Qd5 Rd8 37.Qc6 h5 38.h4 Qd7 39.Qb6 Qd5 40.Kg2 g5 41.hg5 fg5 42.Qc7 Rd7 43.Qe5 Qe5 44.de5 Rd5 45.c6 Rc5 46.Nd4 Kf7 47.e6 Ke7 48.Kf3 Rd5 49.Ke4 Rd6 50.c7 Re6 51.Ne6 Kd7 52.Kf5 h4 53.gh4 gh4 54.Kg4 Ke6 55.c8Q Ke5 56.Kh4 1–0. ognos – toyota12, kurnik, 2012.

4.b5 c6 5.a4 cb5 6.ab5 Qc8 7.e3 Be4 (better is 7...d5!?+=) 8.Nc3+/– Bg6 9.Nf3 (9.Nd5 Ra7 10.Bd4 Rb7+–) 9...f6 (9...Qb7 10.Ne5 Nf6 11.Be2+/–) 10.Be2 (10.Nd5!? Qb7 11.Bd4 Bf7 12.Nb6 Ra7+–) 10...d6 11.0–0 e5 12.Nd5 Qd8 13.Nh4 Nd7 14.Ng6 hg6 15.Bf3 Rb8 16.Qc2 Kf7 17.h3 Nc5 18.d4 Nb7 19.de5 (19.Rfd1 Rh6+–) 19...fe5 (19...de5 20.Nf4! Ne7 21.Rfd1+–) 20.Qc3 (better is 20.Be4!? Nh6+–) 20...Nc5 21.Bg4 Nf6 22.Be2 Nfe4 23.Qc2 Nf6 Black plans e4 24.Bf3 e4 25.Bf6 Qf6?? 26.Nf6 gf6 27.Be4 Ne4 28.Qe4 Re8 29.Qb7 Kg8 30.Qb6 Rh7 31.Ra5 f5 32.Ra7 Rh4 33.Qc6 Rhe4 34.Ra8 Ra8 35.Qa8 Rc4 36.Qd5 Kg7 37.Qc4 d5 38.Qd5 Bb4 39.b6 Kf6 40.b7 Ba3 41.Rb1 Be7 42.Rb6 Kg5 43.f4 Kh4 44.Rg6 Kh5 45.Qf5 Bg5 46.Qg5# 1–0. slax1 – tyk, kurnik, 2011.

4.b5 c6 5.a4 cb5 6.cb5 Nf6 7.e3 d6 8.Nf3 Qd7 9.Be2 Qe6 10.0–0 Nbd7 11.d4 Nd5 12.Nbd2 N7f6 13.Bc4 Qd7 14.e4 Nb4 15.d5 Rc8 16.Be2 Rc2 17.Ba3 Rc7 18.Bb4 g6 19.Ba3 Bg7 20.Nd4 Ne4 21.Ne4 e5 22.Nc6 0–0 23.Bd6 Rcc8 24.Bf8 Bf8 25.Nf6 1–0. rom49szachy – makosv (1615), kurnik, 2012.

4.b5 c6 5.a4 Nf6 6.d4 e6 7.e3 Bb4 8.Nd2 Ne4 9.Ngf3 0–0 10.Bd3 f5 11.0–0 Nd2 12.Nd2 d5 13.Nf3 Nd7 14.Qc2 cb5 15.ab5 dc4 16.Bc4 Bf3 17.Be6 Kh8 18.gf3 Qg5 19.Kh1 Nf6 20.Qf5 Qf5 21.Bf5 Nd5 22.Be4 Nc3 23.Ba8 Ra8 24.Bc3 Bc3 25.Ra2 Rf8 26.Kg2 h5 27.Rc1 Bb4 28.Rc6 Rb8 29.d5 Kh7 30.e4 Bc5 31.d6 Rd8 32.e5 Kg6 33.d7 Kf7 34.e6 Kf6 35.Rc8 Ke7 36.Re2 Bd4 37.Rd8 Kd8 38.e7 1–0. kaasparov – tchoupi43, kurnik, 2012.

4.b5 c6 5.e3 cb5 6.cb5 e6 7.a4 Nf6 8.Nf3 Be7 9.Be2 0–0 10.0–0 d6 11.Na3 Nbd7 12.Nc4 d5 13.Nce5 Ne5 14.Ne5 Ne4 (14...Rc8!?=) 15.d3 Nc5 16.Rb1 (16.Nc6 Bc6 17.bc6 Bd6+/–) 16...Bf6 (better is 16...Rc8!?=) 17.Nc6+/– Bc6 18.Bf6 Qf6 19.bc6 Qd8 (19...e5!? 20.Rb6 Nd7+/–) 20.d4+– Ne4 21.Rc1 Rc8 22.Bb5 Rc7 23.f3 Nd6 24.Qd3 f5 25.Rf2 Rff7 26.Re2 Qg5 27.Qd2 h5 28.Qe1 h4 29.Qf2 h3 30.g3 g6 31.Bd3 Qh6 32.Qe1+/– Qg5 33.e4?? fe4–/+ 34.fe4 de4 35.Be4 Rf4?? 36.Rd1 Qg4 37.Bh1 Rd4 38.Rd4 Qd4 39.Kf1?? Rf7 40.Rf2 Qc4 41.Kg1 Qc5–+ 42.Qe2 Qc1 43.Rf1 Rf1–/+ 44.Qf1 Qe3 45.Qf2 Qc1 46.Qf1 Qc5 47.Qf2 Qc1 48.Qf1= ½–½. fjanusz52 – waldencjusz1, kurnik, 2012.

4.b5 d6 5.d4 e5 (5...e6!?=) 6.de5+/– Qh4 (6...d5 7.Nf3+/–) 7.e3 (7.Nd2 de5 8.Be5 Qd8+/–) 7...Qg5 (7...de5 8.Be5 Qe7 9.Qd4+/–) 8.Nf3 Qh5 (8...Qg6!?+/–) 9.ed6+– Bd6?? (better is 9...cd6 10.Nc3 Nf6+–) 10.Bg7 1–0. Wall,Bill – Stonewall, internet, 2005.

4.b5 e6 5.a4 Nf6 6.d3 Bb4 7.Nd2 0–0 8.e4 e5 9.Ngf3 d6 10.Be2 c5 11.Qc2 Nbd7 12.h3 Bd2 13.Qd2 h6 14.0–0–0 Nh7 15.Nh2 Qg5 16.Bc3 Qd2 (16...Qg2? 17.Rdg1 Qf2 18.Ng4+–) 17.Bd2 f5 18.f3 fe4 19.fe4 Rf7 20.Bg4 Ndf6? (better is 20...Re7+=) 21.Be6+– Raf8 22.Ng4 Ng4 23.hg4 Kh8 24.Bf7 Rf7 25.Rdf1 Rf6? 26.Rf6 Ng5 27.Bg5 (27.Bg5 gf6 28.Bf6 Kg8 29.Rh6+–) 1–0. tyop (1660) – viceversaeuro, kurnik, 2012.

4.b5= Nf6 5.Nf3=.

3.c4 a6

4.a3 e6 5.d3 d6 6.Nf3 Ne7 7.e3 Nd7 8.Be2 c6 9.0–0 Qc7 10.Nbd2 0–0–0? (better is 10...Ng6+/– 11.Ne4; 10...Ng8 11.a4) 11.Ng5+– Ne5 (11...Re8 12.Bh5 Ng6 13.Nf7+–) 12.Be5 de5 13.Nf7 c5 (13...Rg8 14.Nd8 Kd8 15.Ne4+–) 14.Nh8 (14.bc5!? Nf5 15.Nd8 Kd8 16.cb6 Qb6+–) 14...Nf5 15.Bf3 Bd6 16.Bb7 Qb7 17.Ne4 Rh8 18.Qa4 cb4 19.ab4 Bc7 20.Ng5 h6 21.Ne6 g5 22.c5 Nh4 23.c6 Qa7 24.Rfc1 b5 25.Qa6 Qa6 26.Ra6 Kb8 27.Rca1 Bd6 28.Ra8 1–0. b4_player – opponent, gamecolony.com, 2007.

4.a4 e6 5.e3 Bb4?? 6.Bg7 Bg2 7.Bg2 +–.

4.d4 e6 5.a3 Nf6=.

4.d4 e6 5.Nd2 Bb4!? 6.Ngf3 Nf6–/+.

4.e3 d6 5.Nf3 Nd7 6.d4 e6 (6...Ngf6 7.Nc3+=) 7.Be2 (7.Nc3 g6+=) 7...Ngf6 8.0–0 (8.Nc3 g6+=) 8...g6 (8...d5 9.a3+=) 9.Nbd2 (9.Nc3 Bg7+=) 9...Bg7 10.a4 a5 11.b5 (11.ba5 Ra5 12.Bc3 Ra8+=) 11...0–0 12.Qb3 (12.Ng5 h6 13.Bf3 Bf3 14.Ngf3 e5=) 12...Re8 13.Rfe1 Qe7 14.Bd3 (14.Bc3 e5=) 14...e5 15.Be2 e4 16.Ng5 h6 17.Nh3 g5 18.Qd1 (18.Nf1 Nf8=) 18...Nf8=+ 19.f4 ef3 20.Bf3 Bf3 21.gf3 (21.Nf3? g4 22.Nf4 gf3 23.Qf3 Qe4–+) 21...Ng6 22.Nf2 Qd7 23.Qc2 Re7 24.Rad1 (24.d5 Ne5=+) 24...Rae8 25.e4 (25.d5 Ne5=+) 25...Nf4 (25...Nh5 26.Re3–/+) 26.Qc3 (26.Re3!?=+) 26...N6h5–/+ 27.Ng4 f5 28.Nf2 fe4 29.fe4 g4 30.Kh1 Nh3 (30...Rf8 31.Qe3 Ref7–+) 31.Nh3= gh3 32.Rg1 (better 32.Qf3 Nf6 33.e5=) 32...Kh8?? (better 32...Nf4 33.Qe3 Rf7=) 33.Qf3+– Nf6 34.e5 (34.Rg7 Rg7 35.Qf6 Kh7+–) 34...de5? (34...Nh7 35.Qh5 A) 35...de5? 36.de5 Re5 37.Be5 Re5 38.Nf3 Qd1 39.Qg4 (39.Rd1?? Rh5 40.Rd8 Bf8–+) 39...Qg1 40.Kg1+–; B) 35...Rf7+=) 35.de5+– Ng8 (35...Nh7!? 36.Ne4 Qe6+–) 36.Ne4 Qe6 37.Rd5 (better 37.Nf6 Rf8 38.Qd3 Nf6 39.ef6 Rf6 40.Bf6 Qf6 41.Qh3+–) 37...c6?? (better 37...Rf8 38.Qd3 Ree8+–) 38.bc6 (38.Rd6 Qc4 39.Nf6 Bf6 40.ef6 Rf7 41.bc6 Qc5+–) 38...Qc6 39.Nd6 Rf8 40.Qh3 Be5?? (40...Qa4 41.Qd3 Qc6+–) 41.Be5 Re5 42.Qc3 (42.Qc3 Nf6 43.Qe5+–) 1–0. GuestXTRH – GuestMSCK, freechess.org, 2017.

4.e3 Nf6 5.Nf3 e5 6.Be5 Bb4 7.a3=.

3.c4 c5

4.a3 d6 5.e3 Nd7 (5...Nf6 6.Bf6 ef6 7.d4=) 6.Nf3 (6.d4 e6=) 6...Ngf6 (6...e5 7.d3=) 7.Be2 (7.d4 e5=) 7...g6 (7...e5 8.d4=) 8.0–0+= Bg7 9.d3 (9.d4 0–0+=) 9...0–0= 10.Nbd2 (10.Nc3 e6=) 10...Qc7 11.Qb3 (11.Qc2 Rfd8=) 11...d5 (11...e6 12.e4=) 12.cd5 (12.Qc2 dc4 13.Nc4 Rfc8=) 12...Bd5 13.Qc2 Rfc8 14.Rfc1 (14.e4 Bb7=) 14...Bb7 (14...Qd8 15.b5=) 15.Nb3 (15.d4 Qd6 16.dc5 bc5+=) 15...Qd6 16.bc5 Nc5 17.Nc5 (17.Be5 Qd7 18.Nc5 Rc5+=) 17...Rc5 18.Qb3 (18.Qa4 Ra5 19.Qh4 a6=) 18...Rac8 (18...Bd5 19.Qa4=) 19.d4 (19.Rc5 Rc5 20.d4 Rc7=) 19...R5c7 (19...Rc1 20.Rc1 Rc1 21.Bc1=) 20.a4 (20.Rc7 Rc7 21.Ne5 Qd5 22.Qd5 Nd5=) 20...Bd5 21.Qa3 (21.Qb5 Bc6 22.Qe5 Bd5=) 21...Ne4 22.Qd6 (22.Bb5 Qe6=+) 22...Nd6 (22...ed6 23.Bb5=+) 23.Nd2 (23.Rc7 Rc7 24.Kf1 h6=) 23...Ne4 (23...Rc2!? 24.Rc2 Rc2=+) 24.Ne4= Be4 25.Ba6 (25.f3 Bd5=) 25...Rc1 26.Rc1 Rc1 27.Bc1 Bc6 (27...e5 28.Bb2 ed4 29.Bd4=) 28.Bb5 Bb5 (28...Bd5 29.Bb2=) 29.ab5+= e6 (29...h6 30.d5+=) 30.Kf1 (30.Ba3 Bf8 31.Bf8 Kf8+=) 30...Bf8 (30...f5 31.Ba3+=) 31.Bd2 (31.e4 Bd6+=) 31...Bd6 (31...f5 32.Ke2+=) 32.Ke2 (32.e4 f6+=) 32...Kf8 (32...f5 33.h3+=) 33.h3 Ke7 34.Kd3 (34.e4 f6+=) 34...Kd7 (34...f6 35.e4+=) 35.Kc4 (35.e4 f6+=) 35...Kc7 (35...f5 36.f3+=) 36.d5 (36.e4 Kb7+=) 36...ed5 37.Kd5 Be7 38.Bc3 (38.e4 Kb7+=) 38...Kb7= 39.Kc4 (39.e4 a5=) 39...a6 (39...a5 40.Kb3=) 40.ba6 (40.e4 a5=) 40...Ka6 41.e4 b5 42.Kb3 Kb6 43.Bd4 (43.g4 Bd6=) 43...Kc6 (43...Bc5!? 44.Bc5 Kc5=+) 44.f3 Bc5 (44...h5 45.g4=) 45.Bc3 (45.Bf6 h6=) 45...Kd6 (45...Be3 46.g4=) 46.Be1 (46.g4 Be3=) 46...Ke5 47.Bg3 Ke6 48.Be1 (48.Bf4 Bd6 49.Bd6 Kd6=+) 48...f6 (48...g5 49.g4=) 49.Bg3 (49.g4 h5=) 49...h5 (49...h6 50.Be1=) 50.Kc3 (50.h4 Kd7=) 50...g5=+ 51.h4 Be7 (51...gh4 52.Bh4 f5 53.Kd3=+) 52.hg5= fg5 53.Bf2 h4 (53...g4 54.fg4 hg4 55.Bg3=+) 54.Bd4 Bd6 ½–½. jaddwarrior (1915) – MadMonch (2045), ChessWorld.net, 2015.

4.a3 e6 5.bc5 bc5 6.Qc2 Nf6 7.Nc3 Nc6 8.Nf3 a6 9.e4 Qc7 10.d3 g6 (10...Rb8 11.Nd1=) 11.Nd1 (11.Nd5 ed5 12.Bf6 de4 13.Bh8 ef3 14.gf3 Nd4 15.Bd4 Bf3+=) 11...Bg7= 12.Ne3 0–0 13.h3 e5 14.Rb1 Nd4 15.Bd4 (15.Qd1 Qa5 16.Qd2 Nf3 17.gf3 Qc7=) 15...ed4–/+ 16.Ng4 Nh5 17.Qd2 (17.Be2 Nf4 18.0–0 f5 19.ef5 Rf5–/+) 17...Rad8 (17...f5!? 18.ef5 Bf3 19.gf3 Rf5–+) 18.Nh6 (18.Be2 f5 19.ef5 Rf5–/+) 18...Kh8–/+ 19.g4 (19.Be2–/+) 19...Nf4 (better 19...f5!? 20.gf5 gf5–/+) 20.Rb7= Qb7 (20...Nd3 21.Bd3 Qb7 22.0–0=) 21.Qf4 Qb1 22.Ke2 Qc2 23.Nd2 Bh6 (23...Rb8!?=) 24.Qh6+= f5?? (better 24...Rb8+=) 25.gf5+– Rf5 (25...gf5 26.Rg1 Rf7+–) 26.Rg1 (better 26.ef5 Re8 27.Kf3 Qd1 28.Kg3+–) 26...Rf3?? (better 26...Rf6 27.f4 Re8+–) 27.Kf3 (27.Kf3 Rg8 28.Ke2+–) 1–0. Williams,Barry – Geockel,Herman, NZL South Island Championship B, 1999.

4.b5 e6 5.Nf3=.

4.bc5 bc5 5.Nc3 Nc6=.

4.b5 a6

5.a4 Qc8 6.e3 Be4 (6...Nf6 7.Nf3=) 7.Nc3 d6?? (better is 7...Bb7+=) 8.Ne4+– ab5 (8...Qe6 9.Qf3 Ra7 10.Bd3+–) 9.ab5 (9...Ra1 10.Qa1+–) 1–0. nmorgan (1730) – zerglingsforus, net–chess.com, 2003.

5.a4 Nf6 6.Nf3=.

5.ba6 Na6 6.d3 e6=.

4.a4 d6 5.e3 e6 6.b5 (6.Nf3 Nf6=) 6...c5 (6...Nf6 7.Nf3=) 7.Nf3 a6 (7...Nf6 8.d4=) 8.Be2 ab5 (8...Nf6 9.0–0=) 9.ab5 Ra1 10.Ba1 Qc7 (10...d5 11.cd5 ed5 12.0–0=) 11.0–0 d5 (11...Nf6 12.Bf6 gf6 13.Nc3+=) 12.d4 (12.cd5 Bd5 13.Qc2 Nd7+=) 12...dc4 13.Bc4 (better 13.Na3+=) 13...Bd6? (13...cd4 14.Qd4 Bf3 15.gf3=) 14.h3?? (14.dc5!? Qc5 15.Bg7 Bf3 16.Qf3 Qc4 17.Bh8 Bh2 18.Kh2 Qf1+–) 14...f6? (better 14...cd4!? 15.Qd4 Nf6+=) 15.Be6+– Ne7 (15...Qe7 16.d5+–) 16.Nbd2 Nd7 (16...Ng6 17.dc5 Bc5 18.Nd4+–) 17.Nc4 (17.Qb3 cd4 18.Bd4 Ne5+–) 17...cd4 (17...Nf8 18.Nd6 Qd6 19.Bc4+–) 18.Qd4 Bc5 19.Bd7 (better 19.Qg4!? Ng6 20.Bd4+–) 19...Qd7+– 20.Qd7 Kd7 21.Rd1 Kc7 22.Nd4 Nc6?? (better 22...Bd5 23.Nd2 Ra8+–) 23.bc6 (23.Ne6 Kb8 24.bc6 Bc6 25.Ng7 Rf8+–) 23...Bc6 (23...Ba6 24.Rc1 Re8 25.Nb3+–) 24.Ne6 Kb7 (24...Kb8 25.Ng7 Rf8 26.Ne6+–) 25.Nc5 (better 25.Ng7 Ba4 26.Rd2 b5 27.Nd6 Kc6+–) 25...bc5 26.Bc3 Rc8 (26...Ba4 27.Rb1 Kc7 28.f3+–) 27.Rb1 (27.Nd6 Kc7 28.Ba5 Kd7 29.Nc8 Kc8 30.Rd8 Kb7+–) 27...Kc7 (27...Ka7 28.Ra1 Kb8 29.Ra5+–) 28.Ba5 Kd7 29.Nb6 Kc7 30.Nc8 Kc8 31.Rc1 Bd5 (31...Kd7+–) 32.Rc5 Kb7 (32...Kd7 33.Rd5 Ke6 34.Rc5+–) 33.Rd5 Ka6 34.Rd7 (better 34.Bc3 h6+–) 34...Ka5 35.Rg7 Kb4 (35...h6 36.Rf7+–) 36.Rh7 f5 37.Rf7 f4 38.Rf4 Kc3 39.h4 Kd3 40.Rd4 Ke2 41.h5 (41.e4 Ke1 42.e5 Ke2 43.e6 Ke1 44.e7 Ke2 45.e8Q) 41...Ke1+– 42.h6 (42.h6 Ke2 43.h7 Ke1 44.h8Q Ke2 45.Qh5 Ke1 46.Qd1) 1–0. BeepBeepImAJeep (2600) – Hamburgbergedorf, lichess.org, 2017.

3.c4 c6

4.b5 d6 5.a4 Qc7 6.e3 Nd7 7.Nf3 f6 8.Nc3 g6 9.Be2 Kf7 10.d4 Bg7 11.0–0 Ke8 12.Qc2 cb5 13.ab5 f5 14.Bd3 Rc8 15.d5 Ngf6 16.e4 fe4 17.Ne4 Ne4 18.Be4 Bb2 19.Qb2 Rf8 20.Qc2 Ne5 21.Ra7 Nc4 22.Bd3 Bd5 23.Rc7 Rc7 24.Bc4 Rc4 25.Qd2 Bf3 26.gf3 Rf3 27.Qg5 h5 28.Qg6 Kd7 29.Qh5 Rff4 30.Qh3 Kc7 31.Kh1 Rb4 32.Rc1 Kb7 33.Qd7 Ka8 34.Qc8 Ka7 35.Ra1 Ra4 36.Qc7 Ka8 37.Ra4 Ra4 38.Qb6 Ra1 39.Kg2 Rb1 40.Qc6 Kb8 41.b6 d5 42.Qc7 Ka8 43.Qe7 Rb6 44.Qc7 Rb7 45.Qc6 d4 46.Qd5 Kb8 47.Qd4 Rg7 48.Kf1 Rb7 49.f4 Rb1 50.Kf2 Rb2 51.Qb2 1–0. thecat74 – krzysztof1977, kurnik, 2012.

4.Nc3 d6 5.Nf3 e6 6.g3 Qd7 7.Bg2 Na6 8.b5 Nc7 9.a4 cb5 10.cb5 g6 (10...a6 11.a5+=) 11.0–0 Bg7 12.Ne5! Qc8 13.Nc6 Bc6? 14.Bc6+– Ke7? 15.Ba8 Qa8? 16.Qc2 Nh6 17.Nd5! Qd5?? 18.Bg7 Nf5 19.Qc7 Ke8 20.Qc8 Ke7 21.Qh8 Nh4 22.Bf6 (22.Bf6 Kd7 23.Qd8#) 1–0. kannisogoet – baqa, kurnik, 2012.

3.c4 Nc6

4.a3 a6 5.Nf3 e6 6.e3 f5 7.Be2 Nf6 8.0–0 Qe7 (8...Bd6 9.d4+=) 9.d4 0–0–0 (9...Qf7 10.Ne5 Ne5 11.de5+=) 10.b5 ab5 11.cb5 Nb8 12.a4 Qb4 (12...Re8 13.a5 ba5 14.Ra5+–) 13.Ba3 (13.Bc3!? Qd6 14.Ne5+–) 13...Qa5+/– 14.Bf8 Rdf8 15.Na3 Ne4 16.Qc2 g5?? (better is 16...Nc3+/–) 17.Rfc1+– c6 18.Nc4 Qb4 19.Rab1 Qe7 20.Nb6 Kc7 21.a5 g4 22.Ne5 d6 23.Nc6 Nc6 24.d5 Nc5 25.dc6 Ba8 26.Na8 Kb8 27.b6 Ka8 28.a6 Rb8 29.Qa2 Qd8 30.Rc5! dc5 31.Qa5 Qd6 32.a7 Qc6 33.ab8Q Kb8 34.Qa7 Kc8 35.Ba6 Kd8 36.b7 Qe4 37.b8R# 1–0. orangutanb4 (2050) – roli76, kurnik, 2011.

4.a3 d6 5.Nf3 e5 6.d3 Nh6 (6...Nf6 7.d4=) 7.Nc3 (7.b5 Ne7+=) 7...g6 (7...Nf5 8.Nd5=) 8.Nd5 Bg7 9.Rb1 0–0 10.Qd2 Nd4 11.Nd4 ed4 12.g3 (12.Bd4 Bd4 13.Qh6 c6=) 12...Bd5 (12...c6!? 13.Nf4 g5=) 13.cd5= Qd7 (13...Nf5 14.Bh3 Bh6 15.Qc2+/–) 14.Bg2 Qf5 15.Qf4 Qf4 16.gf4 Rad8 17.Rc1 Rc8 18.0–0 a5 19.Rc2 ab4 20.ab4 Rfe8 21.Rfc1 Re7 22.Rc6?? (22.Be4 f5 23.Bf3 Kf7+=) 22...Ng4?? (better is 22...Re2 23.Ba1 Ra2–+) 23.Bh3 Re2?? (better is 23...h5 24.Bg4 hg4+=) 24.Bg4+– (24...Rb2 25.Bc8+–) 1–0. Wall,Bill – McEldowney,Grant, Mare Island CA, 1988.

4.a3 e5 5.e3 Qe7 6.b5 Na5 7.d3 Nf6 8.Nf3 0–0–0 (8...d6!?+=) 9.Ne5+– d6 10.Nc6 (10.Nf3 d5 11.cd5 Nd5+–) 10...Bc6 (10...Nc6!? 11.bc6 Bc6+=) 11.bc6+– d5 12.cd5 Nd5 13.d4 Qd6 14.Ba6 Kb8 15.0–0 Qc6 16.Nd2 (better 16.Bd3!?+–) 16...b5= 17.Rc1?? (better 17.e4 Ne7 18.a4 Qa6 19.Qe2=) 17...Qa6–+ 18.Nf3 (better 18.e4 Nf4 19.Qf3–+) 18...Nc4 19.Ne5 (19.Rc4 bc4 20.Ne5 c3–+ (20...Ba3?! 21.Qa1–/+)) 19...Nb2 20.Qh5 (20.Qb3 Ba3 21.Ra1 b4 22.Nf7 Nc3 23.Qb4 Bb4 24.Ra6 Nbd1–+) 20...g6 21.Qf3 Rg8 (21...Qf6 22.Nc6 Kc8 23.Qe2–+) 22.Nf7?? (better 22.Nc6 Kc8 23.Nd8 Ba3 24.Nc6+=) 22...Rd7 (better 22...Ba3 23.Nd8 Rd8 24.e4–+) 23.Ne5 Re7?? (better 23...Rd6 24.Rc5 Ne7–+) 24.Qd5 (better 24.Nc6 Qc6 25.Rc6+–) 24...Qa3?? (better 24...Re5 25.de5 Rh8+–) 25.Qg8 (better 25.Nc6 Kb7 26.Ne7 Kb6 27.Qc6 Ka5 28.Qc7 Ka4+–) 25...Rg7 (25...Re5 26.de5 Na4 27.Qd5+–) 26.Nc6 Kb7 27.Nd8 (27.Qd5 Kb6 28.Qd8 Nc4 29.Rc4 bc4 30.Rb1 Qb3 31.Rb3 cb3 32.Qf8 Kc6 33.Qg7 b2 34.d5 Kd5 35.Qb2 a5+–) 27...Kc8 28.Rc7 (28.Qd5 Nd3 29.Rcd1 Nb4+–) 28...Kc7?? (better 28...Rc7 29.Ne6 Qe7+–) 29.Ne6 Kd7 (29...Kb6 30.Ng7 (30.Qf8?! Qf8 31.Nf8 a5=) 30...Bg7 31.Qg7+–) 30.Ng7 (better 30.Nf8!? Ke8 31.Qg7 Qf8 32.Qe5 Kf7+–) 30...Bg7 31.Qg7 Ke8 (31...Qe7 32.Qe7 Ke7 33.Rb1+–) 32.Qh7 Nd3 (32...Qd3 33.Qa7 Nd1 34.Qb7+–) 33.Qg6 Kf8 34.Rd1 (better 34.Qf6 Ke8+–) 34...b4 (34...Nb2 35.Rb1 a6+–) 35.Rd3 (better 35.Qd3 Qd3 36.Rd3+–) 35...Qc1 36.Rd1 Qd1. SieStein – Bladys, lichess.org, 2019.

4.a3 e6 5.Nf3 f5 (better is 5...Nf6=) 6.e4 (better is 6.e3+=) 6...fe4–/+ 7.Ne5 Ne5 8.Be5 Nf6 9.Be2 Qe7 (9...a5 10.ba5 Ra5 11.Bc3–+) 10.Bh5 (10.0–0!?+=) 10...g6 11.Be2 d6 12.Bb2 0–0–0 (12...Bg7 13.Nc3–/+) 13.Qa4 (13.c5 Bg7 14.cb6 ab6+=) 13...Kb8–/+ 14.Nc3 Bg7 15.Nb5 a6 16.Nd4 Qd7 (16...Qe8 17.b5 e3 18.fe3 Bg2 19.Rg1+=) 17.b5 a5 (better is 17...Rhf8!?–/+) 18.Nc6= Bc6 19.bc6 Qc8 (19...Qe8 20.Rb1 Rg8 21.Bd4+/–) 20.0–0 (20.Rb1 Ka8=) 20...Rhg8 21.d4 d5 22.c5+/– Ng4?? 23.Bg4+– h5 24.Be2 g5 25.Bc3 g4 26.Rab1 Ka8 27.cb6 cb6 28.Rb6 Bd4 29.Qa5 Qa6 30.Qa6# 1–0. orangutanb4 (2050) – roli76, kurnik, 2011.

4.b5 Nb4 5.a3 Nd3 (5...a6 6.ab4 ab5 7.Na3 (7.cb5?! Ra1 8.Ba1 Qa8 9.Bg7 Bg7=) 7...bc4 8.Nc4 Ra1 9.Qa1+–) 6.ed3 Nf6 7.Nf3 e6 (7...a6 8.ba6 Ra6 9.Be2+–) 8.Be2 d5 9.0–0 dc4 (9...a6 10.Qa4+–) 10.dc4 Bc5 (10...a6 11.Qb3+–) 11.d4 Be7 12.a4 (12.Ne5 0–0+–) 12...0–0 (12...a6 13.Re1+–) 13.Nbd2 Bf3 (13...a6 14.Ne5+–) 14.Bf3 (14.gf3?! a6+–) 14...Rc8 15.c5 (15.Bb7!? Rb8 16.Qf3 Bb4+–) 15...bc5 16.dc5 Bc5 17.Bf6 (17.Nb3!? Bd6+–) 17...Qf6 18.Ne4 Qe7 19.Nc5 Qc5 20.Rc1 Qe7 (20...Qb4 21.Qc2+–) 21.Rc6 Rfd8 22.Qc2 Rd6 (22...Rd4 23.Rc1 Rcd8 24.Rc7+–) 23.Rc1 (23.Qc5!? Qd8+–) 23...Rc6 24.Qc6 Qe8 (24...Qa3+–) 25.Qe8 Re8 26.Rc7 Rd8 (26...h6 27.a5 Rb8 28.b6 ab6 29.a6+–) 27.g3 (27.Ra7 Kf8 28.b6 Rd2+–) 27...f5 (27...Kf8 28.Ra7 Rd3 29.Kg2+–) 28.Bc6 (28.Ra7 Rd3 29.Be2 Rd2+–) 28...g5 (28...Kf8 29.Ra7 Rc8 30.a5+–) 29.Rd7 Rd7 30.Bd7 f4 (30...Kf7 31.a5 Ke7 32.b6 ab6 33.a6 Kd7 34.a7+–) 31.a5 fg3 (31...Kf7 32.b6 ab6 33.a6+–) 32.b6 ab6 33.ab6 e5 34.hg3 e4 35.b7 e3 36.fe3 (36.b8Q Kg7 37.Qe5 Kf7 38.Be8 Kg8 39.Qe6 Kh8 40.Qf6 Kg8 41.Qf7 Kh8 42.Qf8) 36...g4 37.b8Q Kf7 (37...Kg7 38.Qe5 Kf7 39.Qe6 Kg7 40.Qe7 Kg6 41.Be8 Kf5 42.e4) 38.Qe5 (38.Qe8 Kf6 39.Qf8 Ke5 40.Qf4 Kd5 41.Qd4) 38...Kg6 (38...h6 39.Qe6 Kg7 40.Qe7 Kg8 41.Be6 Kh8 42.Qf8 Kh7 43.Bf5) 39.Qf5 (39.Be8 Kh6 40.Qf6) 39...Kg7 40.Be6 h5 41.Qg5 (41.Qf7 Kh6 42.Bf5 h4 43.Qg6) 41...Kf8 42.Qf6 Ke8 43.Qf7 Kd8 44.Qd7 1–0. BeepBeepImAJeep (2665) – JimmyBuzzard (1890), lichess.org, 2017.

4.b5 Nb8 5.Nc3 Nf6 6.a4 g6 7.Nf3 Bg7 8.g3 Ne4 9.Qc2 Nc3 10.Bc3 Bc3 11.Qc3 0–0 12.Bg2 a6 13.0–0 ab5 14.ab5 Ra1 15.Ra1 d6 16.Ra7 Qc8 17.Nd4 Bg2 18.Kg2 c6? (18...c5 19.Nc2 Nd7 20.Ne3+/–) 19.bc6?? (better is 19.Re7 cb5 20.Ne6 (20.cb5?! Qc5+–; 20.Nb5?! Qd8 21.Re4 d5+–) 20...Qe6 21.Re6 fe6 22.cb5+–) 19...Nc6+= 20.Nc6 Qc6 21.f3 e6 22.d3 Rc8 23.Qa3 d5 24.Qe7 Rf8 25.Rc7 Qe8 26.Qb4 dc4 27.dc4 Qb8 28.Rc6 Rc8 29.Rb6 Qc7 30.Rb7 Qc4 31.Qe7?? Qe2–+ 32.Kh3 Qf1 33.Kg4 h5 34.Kg5 Qc1?? 35.f4+= Qc5 36.Kh6 Qe7 37.Re7 Rc2?? 38.Re8# 1–0. kannisogoet – daut123, kurnik, 2012.

4.b5 Nf6? 5.bc6+– dc6 6.Bf6 ef6 7.d4 (7.e3 Bd6+–) 7...Bd6 (7...Bb4!? 8.Nd2 Qd4+=) 8.e3 0–0 9.Nf3 c5 10.d5 Qe7 11.Be2 c6 12.Nc3 cd5 13.Nd5 Qe6 14.0–0 h5 15.Bd3 g5 16.e4 h4 17.Nd2 g4 18.Rc1 g3 19.fg3 hg3 20.h3 Kg7 21.Rf5 Rh8 22.Qg4 Kf8 23.Nf6 Bc8 24.Rcf1 Ke7 25.Nd5 Kd7 26.Qg7 Rf8 27.Rf7 Rf7 28.Rf7 Kc6 29.Ne7 Be7+– 30.Re7 Qd6 31.Bf1 a5 32.e5 Qd4 33.Kh1 Bd7 34.e6 Bc8 35.Rc7 Kd6 36.Qe7 Ke5 37.Qg5 Ke6 38.Re7 Kd6 39.Ne4 Kc6 40.Qg6 (40.Qg6 Qf6 41.Qf6 Be6 42.Qe6) 1–0. loser22 (1670) – dumnica, kurnik, 2011.

4.b5 Na5

5.d3 a6=.

5.e3 Nc4 6.Bc3 Nd6 7.Nf3 Nf6 8.a4 g6 9.Be2 Bg7 10.0–0 0–0 11.Qb3 Nde4 12.d3 Nc3 13.Nc3 c6 14.d4 cb5 15.ab5 e6 16.Ra2 Ne4 17.Rfa1 Nc3 18.Qc3 Qc8 19.Qc8 Rfc8 20.Ra7 Ra7 21.Ra7 Bf3 22.gf3+= Rc1 23.Bf1 d5 24.Rb7 e5? 25.de5 Be5+= 26.Rb6 Bh2 27.Kh2 Rf1 28.Kg2 Rb1 29.Rb7 Kg7 30.f4 h5 31.Kg3 Kf6 32.f3 Rb3 33.Rd7 Rb5–+ 34.e4 de4 35.fe4 Rb3 36.Kf2 Rh3 37.Rd6 Kg7 38.Ra6 f6 39.Ra7+= Kh6 40.Rf7 Rh2 41.Kf3 Ra2 42.Rf6 Ra3 43.Kf2 White prepares f5 43...h4 44.f5 Ra2 45.Kf3+/– Kh5 46.Rg6 Ra3 47.Kg2 Ra2 48.Kh3 Ra3 49.Kh2 Ra2? 50.Rg2+– Ra5? 51.f6 Ra8 52.e5 Re8 53.f7 Rf8 54.e6 Kh6 55.e7 Rf7 56.e8Q (56.e8Q Rg7 57.Qh8 Rh7 58.Qf6 Kh5 59.Rg5#) 1–0. tyop (1620) – qekliku1, kurnik, 2012.

5.e3 Nc4!? 6.Bd4 Nd6–/+.

5.e3 d5 6.cd5+= Bd5 7.Nc3 Bb7 8.d4 Nf6 9.Nf3 e6 10.Bd3 Bd6 (10...a6 11.a4=) 11.0–0 0–0 (11...c6+=) 12.a4 (12.e4 Nh5+/–) 12...Nd5 (12...c5!?=) 13.Nd5+= Bd5 14.Ba3 (14.e4 Bb3 15.Qb1 Bc4+/–) 14...Ba3 (14...c5 15.bc6 Rc8 16.Bd6 Qd6 17.Rc1=) 15.Ra3+= Qe7 (15...f5+=) 16.Qc1 (16.Rc3 Rac8+/–) 16...Rac8 (16...Bf3!? 17.gf3 c5 18.bc6 Nc6=) 17.Rc3 Bf3 18.gf3 Nb7 (18...Qg5 19.Kh1+=) 19.Kh1+/– f5 20.Rg1 Nd6 21.Rg3 (21.Qc2 Rfd8+/–) 21...Ne8 22.Rc6+/– Nf6 23.Qc4 Rfe8?? 24.Bc2?? Nd5 25.Bb3 f4 26.ef4 Nf4= 27.Rg4 Qf6 28.Rc7 Rc7+= 29.Qc7 Nh3 30.Qg3+/– Qd4?? 31.Rd4+– g6 32.Qh3 (32.Qh3 a6 33.Rd7 h6 34.Be6 Re6 35.Qe6 Kf8 36.Qf7#; 32.Qe5 Nf2 33.Kg2 a6 34.Rd7 Re7 35.Be6 Re6 36.Qg7#) 1–0. baovn21 – prusakowski7, kurnik, 2011.

5.e3 Nf6 6.Bc3 (6.Nf3 e6=) 6...Rb8 (better is 6...Nc4!? 7.Nf3 Nd6–/+) 7.Qa4 c6 8.Nf3 cb5 9.cb5 g6 (9...Bf3 10.Bf6 Rc8 11.Bc3=) 10.Na3 (10.Bf6 ef6 11.Be2 Rc8+=) 10...Bg7 (10...Bf3 11.gf3 Rc8 12.Ba5 ba5 13.Nc4=) 11.Rc1 (11.Be2 Ra8+=) 11...0–0 12.Be2 Ne4 (12...Bd5 13.Nc2+=) 13.Ba5 Nd2?? (better is 13...ba5 14.0–0 Bb2+=) 14.Bd2+– Bb2 15.Rb1 Ba3 16.Qa3 Ra8 17.0–0 Bd5 18.Bc1 e6 19.Bb2 h5 20.Qc3 f6 21.h3 Rc8 22.Qd4 Rc5 23.Rfc1 Rc1 24.Rc1 Qa8 25.Ne1 Kh7 26.Bf3 Bf3 27.Nf3 e5 28.Qd7 Kh6 29.Ne5! fe5 30.Be5 Rf5 31.Qg7 Kg5 32.g3 Qf3 33.h4 Kg4= 34.Qg6 Kh3 35.Kf1?? Qf2# 0–1. carocan (1765) – fredk, kurnik, 2011.

5.e3 e6

6.a4 Nc4 7.Bc3–/+.

6.a4 Qe7 7.Nc3 (7.Nf3+=) 7...g6?? (better is 7...Nc4 8.Bc1 a6–/+) 8.Nd5+/– ed5 9.Bh8 0–0–0 10.cd5+– f6 11.Nf3 Bh6? 12.g3?? Bd5 13.Bg2 Qf7 14.0–0 Ne7 15.Bf6 Qf6 16.Qc2?? Bb7 17.Nd4 Bg7 18.Rac1 Bg2?? 19.Qc7# (19.Kg2 c5+=) 1–0. kannisogoet – macarie, kurnik, 2012.

6.Bc3 Nc4 7.Nf3 Nd6 8.Be2–/+.

6.Bc3 Nf6 7.Qa4 (7.Nf3 a6=) 7...Ne4 8.Ba5? (better is 8.Bd4+=) 8...ba5 9.Qa5?? (better is 9.Nf3 Qf6 10.Nd4 Qf2 11.Kd1–+) 9...Bc5 (better is 9...Qf6 10.f3 Qa1–+) 10.Nf3= Bb6 11.Qb4 Bc5 12.Qb2+= 0–0 13.d3 Nf6 14.Be2 Qe7 15.0–0 d5? 16.d4+– Bb6 17.c5 Ba5 18.Nbd2 c6 19.Nb3 Bd8 20.a4 cb5 21.ab5 Ne4 22.Nfd2 Nd2 23.Qd2 Qf6 24.c6 Bc8 25.Nc5 Bb6 26.Rfc1 Bc5 27.dc5 Rd8 28.Qc3 Qe7 29.b6 d4 30.ed4 e5 31.b7 Bb7 32.cb7 Qb7 33.Bf3 e4 34.Be2 Qd5 35.Rd1 a5 36.Ra5 Ra5 37.Qa5 f5 38.Qc3 Rc8 39.Bc4 (39.Bc4 Qc4 40.Qc4 Kh8 41.Qe6+–) 1–0. carocan (1670) – ratagan, kurnik, 2011.

6.Nf3 Qe7 7.Be2 Qb4 8.Bc3 Qe7 9.0–0 0–0–0 10.d4 Kb8 11.a3 g6 12.Qd2 Bg7 13.Ba5 ba5 14.Qa5 e5 15.d5 e4 16.Nd4 Bd4 17.ed4 f5 18.Qc3 f4 19.a4 f3 20.gf3 Qg5 21.Kh1 ef3 22.Bf3 Nf6 23.a5 Rhf8 24.b6 cb6 25.ab6 a6 26.Nd2 Qf4 27.Bg2 Ng4 28.Qg3 Qg3 29.fg3 Ne3 30.Rf8 Rf8 31.Ne4 Nc4 32.Nc5 Rf7 33.Na6 Ba6 34.Ra6 Kb7 35.Ra4 Ne3 36.Rb4 Ng2 37.Kg2 Rf5 38.Rb5 Rf7 39.h4 h6 40.Kh3 d6 41.g4 Rf3 42.Kg2 Rd3 43.Rb4 Re3 44.h5 gh5 45.gh5 Rd3 46.Kh2 Rf3 47.Kg2 Rd3 48.Kf2 Rh3 49.Ke2 Rh5 0–1. rom49szachy – daborek, kurnik, 2012.

6.Nf3 f6 7.Bc3 Qe7 8.Ba5 ba5 9.Be2 Nh6 10.Nc3 g6 11.a4 Bg7 12.0–0 0–0 13.d4 Nf7 14.c5 c6 15.Qb3 cb5 16.ab5 a6 17.b6 d6 18.cd6 Qd6 19.Ra5 Rfc8 20.h3 Kh8 21.Na4 Bf8 22.Nc5 Bd5 23.Qb2 e5 24.b7 Rcb8 25.ba8Q Rb2 26.Re1 Ba8 27.Ra6 Rb6 28.Ra8 Kg7 29.Ra7 ed4 30.ed4 Kh8 31.Rf7 Bg7 32.Bf1 Qf4 33.Re8 1–0. rom49szachy – arlind60, kurnik, 2012.

6.Nf3= Nf6 7.Bc3 c6 8.Ba5 ba5 9.a4 Bb4 10.Be2 a6 (10...cb5 11.ab5 d5 12.Nc3+=) 11.bc6 Bc6 12.0–0 d6 13.Nd4 Bd7 14.Bf3 (14.Nc3 e5 15.Nf3 0–0+=) 14...Rc8+= 15.Bb7 Rc4 16.Ba6 Rc5 17.Bb5 0–0 18.Bd7 Qd7 19.Nc2 (19.Nb5 Nd5–/+) 19...Rfc8 20.Nb4 ab4 21.Qb3 Qc7 22.d4 Rc1 23.Nd2 Rf1 24.Rf1+= Qc3 25.Qa2 Qa3 26.Qa3 ba3 27.Ra1 Rc3?? 28.Kf1 Nd5= 29.Nb1?? Rc1–+ 30.Ke2 Nb4?? 31.Ra3–/+ Rb1 32.a5 Rb2 33.Kf3 g6?? 34.a6= Na6 35.Ra6 d5 36.h4 Kg7 37.g3 Kf6 38.Ra7 Rc2 39.Rb7 h6 40.Ra7 g5 41.hg5 hg5 42.g4 Kg6 43.Ra6 Kg7 44.Ra7 Kf6 45.Ra6 Ke7 46.Ra7 Kf6 47.Ra6 Kg7 48.Ra7 ½–½. Pruvost,A – Durot,E (1740), 8th Open, La Fere FRA, 2009.

6.Nf3= Nf6 7.Nc3 a6=.

3.c4 d5

4.cd5 Qd5 5.Nc3 Qd8 6.e3 Nf6 7.a3 e6 8.Nf3 Bd6 9.Be2 0–0 10.0–0 h6 11.Rc1 c5 12.Qb3 (12.bc5 Bc5 13.d4 Be7+=) 12...cb4= 13.ab4 Bc7 (better is 13...a6!?=) 14.Nb5+/– Ba6?? (better is 14...Bd6+/–) 15.Nc7+– Be2 16.Na8 Bf1?! 17.Kf1 Ne4 18.Nc7 g5?? 19.d3 Nd6 20.Qc3 f6 21.Ne6 Qe7 22.Nf8 Qf8 23.Qf6 Qf6 24.Bf6 Nd7 1–0. bluepiramid2 (1790) – piwot333, kurnik, 2011.

4.cd5 Bd5 5.Qc2 Nf6 6.d3 e6 7.a3 Be7 8.Nd2 0–0 9.Ngf3 Bf3 10.Nf3 Bd6 11.g3 h6 12.Bg2 Nbd7 13.0–0 Rc8 14.e4 c5 15.e5 cb4 16.Qe2 Bc5 17.ef6 Nf6 18.ab4 Bb4 19.Ra7 Bc5 20.Rfa1 b5 21.Rb7 b4 22.d4 Bd6 23.Ne5 Nd5 24.Bd5 ed5 25.Raa7 Rc7 26.Nc6 Rc6 27.Rd7 Qf6 28.Qg4 Rc2 29.Ba1 Qf2 0–1. sagonek – stonesrolling, kurnik, 2012.

4.cd5 Bd5 5.Nc3 Bb7 6.e3 Nf6 7.d4 e6 8.a3 Be7 (8...Bd6 9.Nf3=) 9.Nf3 Nbd7 10.Bd3 h6 11.0–0 0–0 12.Rc1 Qe8 (12...c5!? 13.bc5 bc5=) 13.Nb5+/– c6? (better is 13...Qd8!?+/–) 14.Nc7+– Qd8 15.Na8 Qa8 16.Qc2 (16.Qa4 Rc8+–) 16...c5 17.bc5 Bf3 18.gf3 (18.c6 Bd5 19.e4 Ne4 20.Be4+–) 18...Qf3+/– 19.Be2 Qh3 20.Rfd1 bc5 21.Bf1 Qg4 22.Bg2 Ne4?? (better is 22...Rc8+/–) 23.h3 Qg6 24.Qe4 cd4 (24...Qe4 25.Be4 Rb8+–) 25.Qb7 (25...Rd8 26.Qa7+–; better is 25.Qg6 fg6 26.Rc7 Bh4 27.Rd7 Bf2 28.Kh2 Be3 29.Bd4 Bd4 30.R1d4 Rf7+–) 1–0. Wall,Bill – Devine J, internet, 2004.

4.cd5 Bd5 5.Nc3 Bb7 6.e3 Nf6 7.Nf3 g6 8.Be2 Bg7 9.0–0 0–0 10.Rc1 Nd5 11.Nb5?? (better is 11.Nd5!? Bd5 12.Bg7 Kg7 13.Qc2+/–) 11...c6 (better is 11...Bb2 12.Rb1 Bg7–+) 12.Bg7= Kg7 13.Nbd4 Qc7 14.a3 e5 15.Nb5 Qd7 16.Ne5 Qe6 17.Ng6 fg6 18.Nd4 Qe4 19.Bf3 Qe5 20.Qb3 Kh6 21.Nc6? Bc6–+ 22.Rc6 Nc6 23.Bd5 Rac8 24.d4 Ne7?? 25.de5+– Nf5 26.e4 Nd4 27.Qh3 Kg7 28.Qd7 Kh6 29.Qa7 Rf4 30.f3 Ne2 31.Kh1 Rh4 32.Qb7 Rc2 33.Qb6 Ng3 34.Kg1 Nf1 35.Kf1 Rh2 36.Qe3 Kg7 (36...Kg7 37.Qa7 Kh6+–). lican – karmnik, kurnik, 2012.

4.e3 dc4 5.b5 Nf6 6.Nf3 Bd5 7.Nc3 e6 8.Qc2 Bb4 9.Nd5 ed5 10.a3 Bd6 11.g3 (11.d3!? cd3 12.Bd3=) 11...0–0 12.Bg2 Nbd7 13.d4 cd3 14.Qd3 Nc5 15.Qc2 Qe7 16.0–0 Rad8 (16...a6 17.a4+=) 17.Ng5 (better is 17.Nd4!? Rde8 18.Nc6+=) 17...Nfe4 18.Nh3 Be5 19.Bd4 g6 20.Rac1 Qf6 21.Be4 Ne4 22.Be5 Qe5 23.Nf4 Nc5 24.Nd3 Nd3 25.Qd3 f5 26.a4 Qe4 (26...Qe4 27.Qe4 de4 28.Rc7 Rf7=). typ48 – shemi2008, kurnik, 2012.

4.e3 dc4 5.Nc3 e6=+ 6.Bc4?? (better is 6.b5=+) 6...Bg2–+ (6...Bb4?! 7.Nf3 a6 8.0–0–/+) 7.Qa4 (7.Nb5 Bh1 8.Be5 Nd7 9.Nc7 Ke7 10.Bg7 Bg7 11.Na8 Ba1 12.Qa1 Ngf6–+) 7...c6 8.b5 c5 (8...Bh1 9.d3–+) 9.0–0–0 (9.d4 Bh1 10.Rd1 cd4 11.Rd4 Qc7–+) 9...Bh1 10.Nge2 (10.Be2 Bb7–+) 10...Bf3 11.Rg1 Nd7 (11...Qh4 12.Rg3 Qh2 13.Nd1–+) 12.Nf4 (12.Rg3 Ne5–+) 12...Ne5 13.Nh5 Nc4 14.Qc4 Bh5 15.Ne4 Nf6 16.Nf6 gf6 17.Qh4 Be7 18.Qh5 Qd6 19.Qf3 Rd8 20.Qc6 Qc6 21.bc6 Rc8 0–1. gtate (1885) – deathxxxsupplier (1875), net–chess.com, 2003.

4.e3 dc4 5.Nf3 Nc6 6.b5 (better 6.Bc4 e6 7.b5=) 6...e6?? (better 6...Nb4 7.Bc4 Nd3 8.Bd3 Qd3=) 7.bc6+– Bc6 8.Bc4 Bc5?? (8...Ne7 9.0–0+–) 9.0–0 (better 9.Bg7 Ne7 10.Bh8+–) 9...Nf6 10.d3 (10.Ne5!? Bb7+–) 10...0–0 11.d4 Be7 12.Nbd2 Nd5 (12...Bd6 13.Qc2+–) 13.Rc1 Bh4 (13...Bb7 14.e4 Nf4 15.Qb3+–) 14.Nh4 (better 14.e4 Bf6 15.Bd5 Bd5 16.ed5 Qd5 17.Rc7 Qa2+–) 14...Qh4 15.Nf3 Qh6 16.Ne5 (16.Re1 f5+–) 16...Be8 (16...Bb7 17.Qf3 f6 18.Nd3+–) 17.Bd5 ed5 18.Rc7 f5 (18...Bb5 19.Re1 Qd6 20.Rc3+–) 19.Qf3 (better 19.Qb3 Bh5 20.Qd5 Kh8 21.Ba3+–) 19...Rf6 (19...Qd6 20.Rfc1 Ba4+–) 20.Qd5 Kh8 21.Qa8 Rf8 22.Nf7 Rf7 (22...Bf7 23.Qf8 Bg8 24.d5 Qh2 25.Kh2 a6 26.Bg7) 23.Qe8 Rf8 24.Qf8 1–0. BeepBeepImAJeep (2700) – acidburp (1730), lichess.org, 2016.

4.e3 dc4 5.Nf3 Qd6 6.Na3 Qb4 7.Nc4 Qc5=.

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

3.c4 d6

4.a4 Nd7 5.b5 e5 6.e3 f5 (6...a6 7.d4=) 7.Nf3 Ngf6 8.Be2 Be7 9.0–0 e4 (9...a6 10.d4+=) 10.Nd4+– g6 11.Ne6 (11.Nc3 Nc5+=) 11...Qc8+= 12.d3 (12.a5 a6+=) 12...Ne5 13.Nf4 0–0 (13...ed3!? 14.Bd3 a5+=) 14.d4+– Nf7 15.d5 Ng5 (15...Nd8 16.Nc3+–) 16.h4 Nf7 17.Ne6 (17.h5 gh5 18.Ne6 Re8+–) 17...Re8 18.Qd4 (18.h5 Nd8 19.Nd4 a6+–) 18...Ne5 19.Nd2 (19.Nc3 a6+–) 19...Bf8? (19...Nfd7!? 20.Qc3 Bh4=) 20.f4 (20.a5 ba5 21.Rfb1 Bg7 22.Ng7 Kg7+–) 20...ef3 21.Nf3 White gets in control 21...Re7 (21...Re6!? 22.de6 Bg7 23.Ne5 de5+=) 22.Ne5 de5 23.Qe5 Rf7? (23...Bg7!? 24.Qd4 Re6 25.de6 Qe6+–) 24.Bd3 (24.e4!? Bd6 25.Qd4 Bc5 26.Nc5 bc5+–) 24...Qd7 (better 24...Bd6 25.Qc3 Be7+–) 25.e4 Re8 (25...Bd6 26.Qc3 f4 27.g4 Bc5 28.Kh1+–) 26.ef5 gf5 (26...Bc5 27.Nc5 Re5 28.Nd7 (28.Be5?! Qe7 29.Ne6 Ng4 30.Bc7 gf5+–; 28.Nb7?! Ng4+=) 28...Nd7 29.fg6 hg6 30.Bg6+–) 27.Rf5 (better 27.Qf5 Bd5 28.cd5 (28.Bf6?! Be6 29.Qg5 Bg7+–) 28...Qd5 29.Qd5 Nd5 30.Rf7 Bc5 31.Nc5 Kf7 32.Na6+–) 27...Bd6 (27...Bg7 28.Raf1 c6 29.Rf6 Bf6 30.Rf6 Rg7 31.Bh7 Kh7 32.Qh5 Kg8 33.Rh6 Rh7 34.Rh7 Qh7 35.Qe8) 28.Rg5 (28.Rf6 Be5 29.Rf7 Kf7 30.Be5 Re6–/+) 28...Kh8 (28...Rg7 29.Qf6 Be5 30.Be5 Kh8 31.Rg7 Qe6 32.Rh7 Kg8 33.Qg7) 29.Qf6! Rf6 A pinning theme 30.Bf6 Qg7 31.Rg7 (31.Bg7 Kg8 32.Be5 Kf7 33.Rg7) 31...Bc5 32.Kh1 (32.Nc5 Rf8 33.Bb2 Rf6 34.Bf6 bc5 35.Rg6) 32...Re6 33.Rg6 (33.de6 Bd4 34.Rh7 Kg8 35.Rh8) 33...Rf6+– 34.Rf6 Kg7 35.Raf1 Bd4 36.Rf7 Kh6 (36...Kg8 37.Rf8 Kg7 38.R1f7 Kh6 39.Rh7) 37.Rc7 (37.Rc7 Bg7 38.Rf6 Kh5 39.Be2 Kh4 40.Rg7 Bd5 41.Rf4; 37.Rh7) 1–0. BeepBeepImAJeep (2565) – JohnHF (1940), lichess.org, 2017.

4.Nc3 e5 5.e3 Nf6 6.d4 Be7 7.Nf3 ed4 8.Nd4 (worse is 8.Qd4 Nc6 9.Qd2 Nb4–/+) 8...0–0 9.f3 Re8 10.g3 h6 11.Bg2 a5 12.b5 c5 13.Nf5 d5 14.cd5 Nd5 (14...Bf8!? 15.Qd2 A) 15...Bd5? 16.0–0–0+– (16.Nd5?! Qd5 17.Qd5 Nd5+/–); B) 15...g6+/–) 15.Nd5+– Qd5 16.Ne7 Re7 17.e4?? (better is 17.Qd5 Bd5 18.0–0–0+–) 17...Qc4 18.Qd8 Kh7 19.Qe7 Qb4 20.Kf1 Qb2 21.Re1 Qb5 22.Re2?? Qb1 23.Kf2+– Qb4 24.Qb7 Nc6?? 25.g4 Nd4 26.Rhe1 Re8? 27.Re3 Qd2 28.R1e2! Ne2 29.Re2 Qd4 30.Kg3 Qe5 31.f4 Qc3 32.Bf3 g5 33.Qf7 Kh8 34.Qe8 Kg7 35.f5 Qf3 36.Kf3 (36.Kf3 h5 37.Qe7 Kh6 38.f6 hg4 39.Kg4 b5 40.Qg7) 1–0. kannisogoet – opticalube, kurnik, 2012.

4.Nc3 e5 5.Nf3 Qd7 6.g3 Nc6 7.b5 Nd4 8.Bg2 Nf3 9.ef3 0–0–0 10.0–0 Kb8 11.d4 ed4 12.Qd4 Ne7 13.Rfe1 h5 14.Qd1 (14.a4!?+=) 14...h4= 15.Qe2 hg3 16.fg3 f6 17.Rad1 Ng6 (17...Qf5 18.Qd3 Qh5 19.h3=) 18.a4 Ne5 19.f4 Bg2 20.fe5 (20.Kg2 Qh3 21.Kg1 Nf3 22.Qf3 Qh2 23.Kf1 Qb2+=) 20...Bb7 21.e6 Qe8 22.e7 Be7 23.Qe7 Qh5 24.h4?? Qc5?? 25.Qe3+/– Qc4 26.Rc1 Qg4 27.Ne4 Rh4?? 28.Qf4 Qf4–/+ 29.gf4 Rf4 30.Nc3?? Rh8–+ 31.Ne2 Rh1# 0–1. kannisogoet – octavka, kurnik, 2012.

4.Nc3 Nf6 5.Nf3 g6 6.g3 Bg7 7.Bg2 0–0 8.0–0 Nbd7 9.e3 c6 10.d4 a6 11.a4 Rb8 12.Qe2 a5 13.b5 cb5 14.cb5 Nd5 15.Rfc1 Nb4 16.Ba3 e5 17.Bb4 ab4 18.Na2 ed4 19.Nd4 Bg2 20.Kg2 Re8? 21.Qd3 Nc5= 22.Qd2 Ne4 23.Qb4+/– Qf6 24.Rf1 d5 25.Rad1 Ng5 26.h4 Ne6 27.Nc6 Rbc8 28.Rd5 Nc5 29.a5 Ne4 30.a6 Nc5 31.a7 Qe6 32.Rdd1?? Qe4?? 33.Kg1 Qg4?? 34.Qg4 Ne6 35.Nab4 Nc5 36.Ra1! Re4 37.Qc8 (37.Qc8 Bf8 38.a8Q Ne6 39.Nd8 Nf4 40.Nf7 Nh3 41.Kh2 Re8 42.Qe8 h5 43.Qf8 Kh7 44.Qg8#) 1–0. kannisogoet – lalamido72, kurnik, 2012.

4.d3 c5 5.bc5 dc5 6.Nd2 e6 7.Ngf3 Nf6 8.g3 Be7 9.Bg2 Nbd7 10.0–0 0–0 11.a4 Re8 12.Qb3 Qc7 13.Rfe1 Reb8 14.e4 Ne8 15.Qc3 Bf6 16.d4 cd4 17.Nd4 Nc5 18.e5? (18.Qe3 Qd7 19.e5 Bg2 20.ef6 Na4 21.Ra4 Qa4 22.Kg2 Nf6=) 18...Be7 (better is 18...Be5!? 19.Qe3 Bg2 20.Qe5 Qe5 21.Re5 Nd3–/+) 19.N2f3= Rd8 20.Qe3 Rac8 21.Ng5?? h6 22.Ne4 Ne4 23.Be4 Be4 24.Qe4 Qc4 25.Rac1 Qd5?? 26.Qd5 ed5 27.Nc6 Kf8 28.Nd8 Rd8 29.e6 f6 30.Bd4+/– Nd6 31.Rc7 Nf5 32.Rd1 Nd4 33.Rd4 Bc5 34.Rd1 a5 Black prepares the advance d4 35.Re1 Re8 36.Kg2 d4 37.Kf3 Kg8 38.Ke4?? Kh7 39.Kd5 Kg6 40.Kc6 d3+/– 41.Rd1?? Re6+= 42.Kb5 Rd6 43.Kc4 d2 44.Kc3 Bb4 45.Kc2 Re6 46.Rd2 Bd2 47.Kd2 Rd6 48.Kc2 1–0. sagonek – exp2005, kurnik, 2011.

4.d3 e5 5.e4 Nd7 6.a3 g6 7.g3 (7.Nd2 Ngf6+=) 7...f5=+ 8.f3 Bg7 9.Nd2 Ne7 10.Bh3 0–0 11.Qb3 (11.Ne2 a5=+) 11...Kh8 (11...a5 12.Ne2=+) 12.Ne2 a5 13.0–0 Ng8 (13...ab4 14.ab4 Ra1 15.Ra1=) 14.Rfc1 (14.f4!?=) 14...Qg5=+ 15.f4 Qe7 (15...Qh5 16.Bf1=+) 16.Qc2 fe4 17.de4 ef4 (17...Ngf6 18.Rf1=+) 18.Bg7 (18.Nf4 Bb2 19.Qb2 Ne5=) 18...Qg7=+ 19.Bd7 Qd7 (19...f3!? 20.Nf4 Qd7 21.Nf3 Nf6=+) 20.Qc3= Qg7 21.Qg7 Kg7 22.Nf4 (worse 22.gf4 Rae8=+) 22...Rae8 23.Nd5 Bd5 (23...Rf7 24.ba5 ba5 25.Rab1=) 24.cd5+= (worse 24.ed5 Re2 25.Nf1 Rff2=) 24...Rf7 25.Rf1 (25.ba5 ba5 26.Rc4 Nf6+=) 25...Nf6 26.Rae1 (26.ba5!? ba5 27.Rac1=) 26...ab4=+ 27.ab4 Rfe7 Increases the pressure on the backward pawn 28.Rc1 Ne4 29.Ne4 Re4 30.Rc7 R8e7 31.Rc6 Rb4 32.Rd6 Rb2 (32...b5 33.h4=) 33.Rf2 Rb1 34.Kg2 b5 35.Rb6 Rd7 36.Rd2 b4 37.d6 (37.Kf3 Kf7=) 37...b3 38.Kf2 Kf6 39.Ke3 Ke6 40.Kf2 (40.Rd4 h6=) 40...b2 (40...g5 41.h3=) 41.h4 Rh1 42.Re2 Kd5 43.Rbb2 Rh2 (worse 43...Kd6 44.Red2 Ke7 45.Rd7 Kd7 46.Rb7 Ke6 47.Rh7+–) 44.Kf3 Re2 45.Re2 Kd6 (45...Rf7 46.Ke3=) 46.Rd2+= Ke6 47.Rd7 Kd7 48.Kf4 Ke6 49.Kg5 Kf7 50.Kh6 Kg8 51.g4 White prepares h5 51...Kh8 52.h5 gh5 ½–½. petrobbo (2075) – UConnKid (2160), ChessWorld.net, 2011.

4.d4 a5 5.b5 Nd7 6.d5 Nc5 7.Bd4 e5 8.Bc5 bc5 9.e4 Ne7 10.Bd3 g6 11.g4 h5 12.gh5 Rh5 13.Nd2 Bh6 14.Qc2 Ng8 15.0–0–0 Bc8 16.Ne2 (16.Be2 Bd2 17.Kd2 Qg5 18.Kd3 Rh4+=) 16...Qh4 (better is 16...Qf6!?–/+) 17.Ng3= Qf4 (better is 17...Rg5!?=) 18.Nh5+/– gh5 19.f3 Bh3 (19...Qf3 20.Kb1 Decoy) 20.Rhg1 Kd7 21.Rg3 Bg2?? (better is 21...Qh4+–) 22.Rg2 Qf3 23.Rg3 Qf2 24.Rdg1 Nf6 25.Rf1 Bd2 26.Qd2 Qd2 27.Kd2 Ng4 28.Rf7 Ke8 29.Rc7 1–0. tyop (1735) – sefika, kurnik, 2012.

4.d4 c6 5.Nc3+= Nd7 6.Nf3 g6 7.g3 Bg7 8.Bg2 Qc7 9.0–0 0–0–0? (better is 9...Ngf6+= 10.Qd3 0–0; 9...Nh6 10.b5 0–0) 10.a4+– e6 (10...Ngf6 11.a5+–) 11.Ng5 Nb8 12.a5 h6 13.ab6 ab6 14.Nf3 Ne7 (14...Nd7 15.d5 Bc3 16.Bc3+–) 15.b5 c5 16.Ra7 f5 (16...Rd7 17.d5+–) 17.dc5 dc5 (17...bc5 18.Qc2 Rhg8 19.Ng5 hg5 20.Rb7 Qb7 21.Bb7 Kb7 22.Ra1+–) 18.Qb3 Rd7 19.Na4 Bb2 20.Qb2 Rhd8 21.Ne5 Qe5 22.Qe5 (22.Qe5 Rf8 23.Nb6 Kd8 24.Qb8 Bc8 25.Rd7 Ke8 26.Nc8 Kf7 27.Re7 Kg8 28.Qe5 Rf7 29.Qe6 Kh8 30.Qf7 f4 31.Qg7) 1–0. pereira – biggeqf, internet, 2009.

4.d4 Nd7 5.Nc3 g6 6.Qc2 Bg7 7.Rc1 (7.Rd1 c5 8.bc5 bc5=) 7...e6 8.e3 Ne7 9.Nf3 f5 10.Be2 0–0 11.0–0 c6 12.a3 d5 13.Ng5 Rf6 14.h3 dc4 15.Bc4 Nd5 16.Ne6?? (better is 16.b5 Nc7 17.Qb3+=) 16...Re6–+ 17.e4 fe4 18.Ne4 Kf8 19.Rce1 Nf4?? 20.Be6+– Ne6 21.d5 cd5 22.Bg7?? Kg7 23.Qc3 Kg8 24.Nd6= Rb8?? 25.Re6+– Nf8 26.Nb7 Rb7 27.Rf6 Rc7 28.Qe5 Nd7?? 29.Qe6 Kg7 30.Rf7 Kh6 31.Qe3 g5 32.Qe6 Kh5 33.Rh7# 1–0. slax1 – texasdk, kurnik, 2011.

4.d4 Nd7 5.e3 e5=.

4.d4 Nd7 5.Nf3 c5 6.dc5 dc5 7.b5 Ngf6 8.g3 Bf3 9.ef3 e5 10.Bd3 Be7 11.0–0 0–0 12.Nc3 h6 13.Kg2 (13.Qe2 Qc7+=) 13...Qc7 (13...Re8 14.Qe2+=) 14.Qc2 Kh8 (14...a6 15.Rfe1=) 15.a4 (15.Rfe1 Rfe8+=) 15...Rad8 (15...a6 16.Rfe1=) 16.Rfd1+= Rfe8 17.Bf5 Ng8 (17...Nf8!?+=) 18.Nd5+/– Qd6? (18...Qb7 19.Qe4+/– (19.Ne7?! Re7 20.Qe4 Qb8+/–)) 19.Bd7 (19.Nb6 Qb6 20.Bd7 Rf8 21.Be5 Bf6+–) 19...Rd7 (19...Qd7 20.Be5 Qb7 21.Nc7+/–) 20.Qf5 (better is 20.Nb6 ab6 21.Rd6 Bd6 22.a5+–) 20...f6?? (20...Red8 21.Qf7 Bf6 22.Qh5+–) 21.g4 Bf8?? 22.Nf6 Nf6 23.Rd6 Bd6 24.Rd1 Red8 25.f4 Nh7 26.Be5 Be5 27.Rd7 Rf8 28.Qe5 Nf6 29.Ra7 Ng4 30.Qg7# 1–0. ludice (1745) – roburb, kurnik, 2011.

4.d4 Nf6 5.Nc3 (5.Nf3 Nbd7 6.e3 e5 7.d5 Be7= 0.00) 5...Nbd7 (5...d5 6.Qa4 Qd7 7.Qd7 Nbd7= –0.06) 6.Nf3 (6.d5 c5 7.b5 e5= 0.22) 6...e6 (6...c5 7.a3 cd4= 0.06) 7.Qd3 (7.e3 c5+= 0.31) 7...Be7 (7...d5= –0.06) 8.b5 0–0 9.h4 (9.e4 a6=) 9...Nh5 (9...a6 10.Rc1+=) 10.g3 g6 (10...a6 11.Bg2 Nhf6 12.0–0=) 11.Bg2+= Ndf6 12.0–0 Ng4 13.d5 e5 14.Qd2 f5 15.Ng5 Bg5 16.hg5 f4 17.Ne4 Bc8 18.Bf3 (18.gf4!? Nf4 19.f3+=) 18...fg3 19.fg3 Bf5 20.Bg4 Bg4 21.Rf8 Qf8 22.Rf1 Qe7 23.Nf6 Nf6 24.gf6 Qf7 25.Kg2 Rf8 26.Qd3 Bf5 27.e4 Bg4 28.Bc3 h5 29.Qe3 Kh7 30.Rf2 Qd7 31.Qg5 Rf7 32.Kh2 Qd8 33.Bd2 Qf8 34.Kg2 Bd7 35.Be3 Bg4 36.a3 Bd7 37.a4 Bg4 38.Bd2 Bd7 39.a5 Bg4 40.ab6 ab6 41.Be3 (41.Kf1 Bh3 42.Kg1 Bg4+/–) ½–½. pierre – damski, internet, 2008.

4.e3 (--> 3.e3 d6 4.c4).

4.Nf3 Nd7 5.Nc3 g6 6.Nd5 e5 7.e3 Bg7 8.Be2 c6 (8...c5 9.bc5 dc5 10.Qa4=) 9.Nc3+= Ne7 10.Ne4 (10.d4 c5 11.Nb5 Nf5=) 10...Qc7 (10...Nc8 11.0–0=) 11.c5 (better is 11.d4 d5 12.Ng3=) 11...d5? (better is 11...Nf5=) 12.Nd6+– Kf8 13.Nb7 (better is 13.Ng5 h6 14.Ngf7 bc5 15.bc5+– (15.Nh8?! Qd6 16.bc5 Qc5=)) 13...Qb7= 14.0–0 (14.Rb1 e4 15.Nd4 a5 16.ba5 Ra5=) 14...b5?? (better is 14...bc5 15.d4 e4–/+) 15.Qc2 a6 16.Ng5 h6 17.Nh3 Qc7 18.f4 e4+= 19.Bg7 Kg7= 20.Qc3 f6 21.g4 Kf7 22.g5 f5?? 23.gh6+– Rh6 24.Ng5 Kg8 25.Ne6 (25.Ne6 Kf7 26.Nc7+–) 1–0. orangutanb4 (1965) – water2010 (1940), kurnik, 2011.

4.Nf3 e6 5.e3 Nf6 6.Nc3 g6 7.Rc1 Bg7= 8.Qb3 0–0 9.a4 Nbd7 10.d4= c5 11.Bd3 Bf3 12.gf3 Re8 13.dc5 dc5 14.b5 Ne5 15.Be2 Nd3 16.Bd3 Qd3 17.Rd1 Qf5 18.Ke2 h5 19.Rd6 Qh3 20.Qd1 Nh7 21.Qf1 Qf5 22.Qb1 Qe5 23.Qd3= Qf6 24.Nd1 Qh4 25.Bg7 Kg7 26.Nb2 Rad8 27.Rd1 Rd6 28.Qd6 Qe7 29.Qd7 Nf6 30.Qd2 Qc7 31.Qd6 Re7 32.e4 Qd6= 33.Rd6 Rd7 34.Rc6 g5 35.a5 Rb7 36.Na4+/– Nd7 37.a6 Rb8 38.Ke3?? Ra8 39.Rc7 Ne5 40.Nc3 Nc4–/+ 41.Ke2 Kg6 42.h3 f5 43.ef5 Kf5=+ 44.Ne4 Na3 45.Nd6 Ke5 46.Nf7 Kd5 47.Ng5 Nb5 48.Re7 Nd4 49.Kd3 c4 50.Kc3–/+ Ne2 51.Kb4 Nf4 52.Nf7? Nd3 53.Kb5 Nc5 54.f4? c3 (55.Ra7 Ra7 56.Kb6 Rf7–+) 0–1. Ackermann,Robert – Hintyes,Helmuth, Nuremberg Zabo op, 1999.

4.Nf3 Nf6 5.d4 g6 (5...Nbd7 6.e3=) 6.e4 (6.d5 Bg7+=) 6...Bg7 (6...Be4 7.Nc3=) 7.Nc3 (7.d5 0–0 8.Bd3 c6=) 7...0–0 (better is 7...Ne4!? 8.Ne4 Be4+=) 8.Bd3+= e5 9.d5 c6 10.0–0 cd5 11.ed5 (11.cd5 Nh5+/–) 11...Nbd7 12.Ne4 (12.Re1!?+=) 12...Ne4= 13.Be4 Nf6 14.Qc2 (14.Re1 Ne4 15.Re4 Bc8=) 14...Ne4 (14...Rc8 15.Rfd1+=) 15.Qe4= Bc8 16.Rae1 Bf5 17.Qe3 a5 18.b5 a4 19.a3 Rc8 20.Nd2 h6 21.h3 Kh7 22.g4 Bd7 23.Bc1 Qh4 24.Kh2 f5 25.Nf3 Qf6 26.g5+= Qe6?? 27.h4 f4?? 28.Qe2 Qh3–+ 29.Kg1 Bg4 30.gh6 Bf3 31.Qd3 Qg2# 0–1. dtpwaldi – nebihu (1620), kurnik, 2012.

4.Nc3 Nd7

5.b5 Qb8 6.Nf3 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Bf3 10.ef3 Ngf6 11.g3 g6 12.Bg2 Bg7 13.0–0 0–0 14.d4 e6 15.f4 d5 16.cd5 Nd5 17.Nd5 ed5 18.Bd5 Nf6 19.Bc6 Qd8 20.d5 Ne8 21.Bg7 Kg7 22.Qd4 f6 23.Re1 Nd6 24.g4 Rf7 25.g5 h6 26.gf6 Rf6 27.Re5 Nf5 28.Qe4 Rd6? 29.Re8+– Qf6 30.Qe5 Qe5?? 31.fe5 Rc6 32.bc6 Kf7 33.d6 cd6?? 34.Rb8 de5 35.c7 Nd6 36.c8Q Nc8 37.Rc8 Kf6 38.Rc6 Kf5 39.Rb6 g5 40.Kg2 h5 41.Rb5 g4 42.Kg3 Ke4 43.Kh4 Kf3 44.Kh5 Kf2 45.Kg4 Kg2 46.Re5 Kh2 47.Kf3 Kg1 48.Re3 Kf1 49.Re2 Kg1 50.Ra2 Kh1 51.Kg3 Kg1 52.Ra1# 1–0. kannisogoet – wiol11a, kurnik, 2012.

5.b5 Ngf6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0–0 9.0–0 Qb8 10.a4 a6 11.e3 ab5 12.ab5 Ra1 13.Ba1 Bf3 14.Bf3 Ne5 15.Be2 h5 16.d4 Ned7 17.Bf3 e5 18.Bb2 ed4 19.ed4 Ng4 20.Qd2 Ndf6 21.Ra1 Qd8 22.Ra8 Qd7 23.Rf8 Kf8 24.Qd1 Qe6 25.d5 Qe7 26.Qe2 Ne5 27.Bg2 Nfg4 28.h3 Nf6 29.f4 Nc4? 30.Qc4+– Qe1 31.Kh2 h4 32.Qd3?? hg3?? 33.Qg3+= Qd2 34.Ba1 Qc1–/+ 35.Ne4 Ne4?? 36.Bg7+– Kg7 37.Be4 Qd2 38.Bg2 Qb4 39.Qf2 Qb5+/– 40.Bf1?? Qd5+= 41.Qb2 f6 42.Qa1? Qd2–+ 43.Bg2 Qf4 44.Kh1 g5 45.Kg1 Qe3 46.Kh2 c5 47.Qb2? Qe5–+ 48.Qe5 fe5 49.Kg3 Kf6 50.Kf3? Kf5 51.Bf1 e4 52.Ke3 Ke5 53.Bc4 d5 54.Bb5 d4 55.Ke2 Kd5 56.Ba6 c4 57.Bb7 Ke5 58.Kd2 b5 59.Bc6 b4 Black intends c3 60.Bb5 c3 61.Kc2 e3 62.Kd3 b3 63.Bc4 b2 64.Ba2 e2! (64...e2 65.Kc4 c2 66.Kb4 b1Q 67.Bb1 e1Q 68.Kb5 cb1Q 69.Kc6 Qc3 70.Kd7 Qb7 71.Kd8 Qcc8#) 0–1. kannisogoet – wiol11a, kurnik, 2012.

5.Rc1 g6 6.Qc2 Bg7 7.e3 e6 8.Nf3 Ne7 9.Be2 Bf3 10.Bf3 (10.gf3?! 0–0=) 10...Rb8 11.0–0 Bc3 12.Qc3 (worse is 12.dc3 0–0+=) 12...e5 13.d4 0–0 14.de5 Ne5 15.Rcd1 (better is 15.Be4 f6 16.b5+/–) 15...Nf5? (better is 15...Nf3!? 16.gf3 f6+=) 16.Bc6 Qg5? (better is 16...Ne7 17.Bb5 f6+/–) 17.f4+– Qg4 (17...Qh6 18.e4 Ne3 19.fe5 Ng4+–) 18.fe5 Nh4 (18...Qg5 19.Rf4 f6 20.ef6 h5+–) 19.h3 Qg2 (19...Qg5 20.ed6 f6 21.Rf6 Qf6 22.Qf6 Rf6 23.dc7 Rc8 24.Rd8 Kf7 25.Bd5 Ke7 26.Bf6 Kf6 27.Rc8 Kg5 28.Rh8 Nf5 29.c8Q a6 30.Qd8 Kh6 31.h4 Ne7 32.Qe7 Kh5 33.Qg5#) 20.Bg2 Ng2 21.Kg2 (21.Kg2 Ra8 22.ed6 f6 23.Rf6 Rf6 24.Qf6 cd6 25.Qg7#; 21.ed6 f6 22.Rf6 Kg7 23.Rf5 Rf6 24.Qf6 Kg8 25.Qe6#) 1–0. slax1 – texasdk, kurnik, 2011.

5.Rc1 g6 6.e3 Bg7 7.Qc2 e6 8.d4 Ne7 9.Nf3 d5 10.cd5 Nd5 11.a3 Nc3 12.Qc3 0–0 (12...Bf3 13.gf3 c5 14.Qd2 cd4 15.Bd4=) 13.Bb5 (better is 13.Qc7 Bf3 14.gf3+/–) 13...c5= 14.Bd7 Qd7 15.bc5 bc5 16.Qc5 Rac8 17.Qb4 (17.Qa7 Qb5 18.Rc8 Rc8–+) 17...Ba6 18.Rc5?? (better is 18.Bc3+=) 18...Rc5–+ 19.Qc5 Rc8 20.Qb4? Qd5 21.Qa4 Bb5 22.Qb4 Bf8 23.Qd2 Qa2 24.Bc1 Qb1 25.Kd1 Ba3 26.Ne5 Rc1 27.Qc1 Qc1# 0–1. slax1 – texasdk, kurnik, 2011.

5.Rc1 g6 6.e3 Bg7 7.Qc2 e6 8.Nf3 Ne7 9.Be2 a5 10.b5 c6? (10...0–0 11.d4+=) 11.a4 (11.Ne4!? Ne5 12.c5 bc5 13.Ne5 de5 14.Nc5+–) 11...Qc7 12.0–0 cb5?? (better is 12...0–0+=) 13.Nb5+– (13.cb5?! Rc8+=; 13.ab5?! 0–0+=) 13...Qc6 14.Nfd4 (better is 14.Bg7 Rg8 15.Bb2+–) 14…Qg2# 0–1. slax1 – texasdk, kurnik, 2011.

5.Rc1 g6 6.e3 Bg7 7.Qc2 e6 8.Nf3 Ne7 9.Be2 c6? 10.0–0 (10.Ne4 0–0 11.Bg7 Kg7 12.Nd6 Qc7+–) 10...Qc7 (10...c5 11.bc5 dc5 12.Nb5+=) 11.d4 (better is 11.Nb5 cb5 12.Bg7+/–) 11...c5?? (11...0–0 12.Rfd1+=) 12.b5?? (better is 12.Nb5 Qb8 13.dc5 Bb2 14.Nd6 Kf8 15.Qb2+–) 12...a6 13.ba6 Ra6?? 14.d5?? ed5?? 15.cd5 Nd5?? 16.Nd5 Bd5 17.Bg7 Rg8 18.Bh6 Bf3?? 19.Bf3 Ne5 20.Qe4 Qe7 21.Bf4 Kd7 22.Rfd1 Kc7 23.Qb7 Kd8 24.Be5 Qb7 25.Rd6 Ke7?? 26.Rcd1 Qc8 27.Bf6 Ke8 28.Rd8 Qd8 29.Rd8# 1–0. slax1 – texasdk, kurnik, 2011.

5.e3 g6 6.Rc1 Bg7 7.Qc2 c5 8.b5 a6 9.a4 Qc7?? (9...Ngf6 10.Rb1+=) 10.Nf3 (better is 10.Nd5 Bd5 11.Bg7+– (11.cd5?! Bb2 12.Qb2 Ngf6+=)) 10...ab5?? (better is 10...Ngf6=) 11.Nb5+– Qc6 12.Bg7 Ngf6 13.Bh8 Ne5 14.Bf6 ef6 15.d4 Nf3 16.gf3 Qf3 17.Rg1 cd4 18.Nd4 Qh5 19.Bg2 Bg2 20.Rg2 Qa5 21.Kf1 Qa4 22.Qa4 Ra4 23.Rb1 Rc4 24.Rb6 Ke7 25.Rb7 Kd8 26.Ke2 Kc8 27.Rf7 h5 28.Rf6 g5 29.Rd6 g4 30.Kd3 Rd4 1–0. slax1 – texasdk, kurnik, 2011.

5.e3 g6 6.Nf3 Bg7 7.Be2 e6 8.0–0 Ne7 9.Rc1 a5 10.b5 c6 11.a4 Qc7 (11...c5 12.Kh1+=) 12.Qc2 (better is 12.Nd5 ed5 13.Bg7+/–) 12...cb5?? (better is 12...0–0+=) 13.Nb5+– (13.cb5?! Rc8+=; 13.ab5?! 0–0+=) 13...Qc6 14.Bg7 Rg8 15.Nbd4 Qe4 16.Bh6 Ne5 17.d3 Qg4 18.h3 Nf3 19.Bf3 Qh4 20.Bf4 Bf3 21.Nf3 Qf6 22.Bd6 Nf5 23.Be5 Qd8 24.c5 bc5 25.Qc5 Nh4 26.Qc6 Kf8 27.Qc5 Ke8 28.Qb5 Kf8 29.Nh4 Qh4 30.Qc5 Ke8 31.Qc6 Ke7 32.Qc7 Ke8 33.Qc6 Ke7 34.Qc7 Kf8?? 35.Rc6 Ke8 36.Bd6 f5 37.Bg3 Qg5 38.Re6 Kf8 39.Bd6 Qe7 40.Qe7# 1–0. slax1 – texasdk, kurnik, 2011. (=1.c4 b6 2.b4 Bb7 3.Bb2 d6)

4.d4 e6

5.Nc3 Be7 6.e4 Nd7 (6...Nf6 7.Bd3=) 7.Nf3 (7.Qg4 Bf8+=) 7...Ngf6 (7...d5 8.ed5 ed5 9.Qb3=) 8.Bd3 0–0 (8...d5 9.cd5 ed5 10.e5+=) 9.0–0+= Ne8 (9...c5 10.a3+=) 10.Qc2 (10.d5 a5 11.ba5 Ra5=) 10...e5 (10...c5 11.dc5 dc5 12.b5+=) 11.Nd5+/– Bd5 (11...ed4!? 12.Nd4 Ne5+/–) 12.ed5+– h6 (12...Nef6 13.Rae1+–) 13.de5 (13.Rfe1 a6+–) 13...de5 (13...Ne5 14.Ne5 de5 15.a3+/–) 14.a3 Bf6 (14...a5 15.ba5 Ra5 16.Bh7 Kh8 17.Bf5+/–) 15.Bf5 (15.Rfe1 Nd6 16.Ne5 Ne5 17.Be5 Be5 18.Re5 Re8 19.Re8 Qe8+–) 15...Nd6 (15...e4 16.Be4 Bb2 17.Qb2+–) 16.Bd7 Qd7 17.Ne5 Qc8 18.Nc6 Bb2?? 19.Ne7 (19.Ne7 Kh8 20.Nc8 (20.Qb2?! Qd7 21.Nc6 Nc4+/–) 20...Ba1 21.Nd6+–; 19.Qb2?! Nc4 20.Qc3 Qa6+–) 1–0. Wall,Bill – Revpad, internet, 2005.

5.Nc3 Nf6 6.d5=.

5.f3 d5 6.b5=.

5.f3 Nd7 6.e4 Ngf6 7.Bd3 Be7 8.Ne2 c6 9.0–0 Qc7 10.a4 d5 11.e5 Ng8 12.c5 Nh6 (12...a5 13.Qe1+=) 13.g4 (13.Qc2 a5 14.cb6 Qb6 15.ba5 Qa7=) 13...f6 14.f4 (better is 14.ef6 Bf6 15.Qd2+=) 14...Ng4–/+ (14...bc5?! 15.ef6 gf6 16.dc5+=) 15.Bc1 0–0–0 16.Ng3 f5 17.Nf5?? (better is 17.Bf5 Nh2 18.Kh2 ef5 19.Nf5+=) 17...ef5–+ 18.Bf5 h5 19.h3 Nh6 20.Be6 Kb8 21.f5 Ne5 22.de5 Qe5?? 23.Bh6 Rh6 24.Nd2?? Qg3 25.Kh1 Qh3 26.Kg1 Bg5 27.Qf3 Be3 28.Rf2 Bf2 29.Kf2 Qh4 30.Ke2 Qf6 31.Rf1 g6 32.Qf4+= Ka8 33.Nf3?? Qb2 34.Qd2 Qd2 35.Nd2 gf5 36.Bf5 h4 37.Bh3 Bc8 38.Rh1 Bh3 39.Rh3 Rf8 40.cb6 ab6 41.a5 ba5 42.ba5 Kb7 43.Nb3 Ka6 44.Nc5 Kb5 45.Nd3 Ka5 46.Kd2 Kb5 47.Ne5 c5 48.Rb3 Ka4 49.Rb7 c4 50.Nd7 (50.Nd7 Rf3 51.Ra7 Kb5 52.Ne5–+). poganinbezdom – andrzejsul, kurnik, 2011.

5.f3 Be7 6.e4 (6.a3 d5=) 6...e5 (6...d5 7.Qa4 Qd7 8.Qd7 Nd7 9.ed5 Bb4 10.Bc3 Bc3 11.Nc3 ed5 12.cd5+=) 7.d5 (7.de5 de5 8.Qd8 Kd8 9.Be5 Bb4 10.Nd2 f6=) 7...Nd7 8.Bd3 Ngf6 (8...a5 9.a3=) 9.Ne2+= c6 10.Nbc3 cd5 11.cd5 Rc8 (11...a5 12.b5+=) 12.a3 0–0 13.0–0 Ne8 14.f4 f5 (14...ef4 15.Rc1+=) 15.fe5 (15.ef5 a5+/–) 15...Ne5 16.ef5 Nd3 (16...Bg5 17.Nf4 Bf4 18.Rf4+=) 17.Qd3+/– Nf6 (17...Bf6 18.Nf4 Rf7 19.Ne6+/–) 18.Nf4+– Re8 (18...Qd7 19.Ne6 Rf7 20.Ng5+–) 19.Ne6 Qd7 20.Qg3 (20.Ne4 Ne4 21.Qe4 Bg5+–) 20...Bf8 21.Rae1 Qf7 22.Ne4 Ne4+/– 23.Re4 Bd5 24.Rg4 Be6?? 25.fe6+– Qe7 26.Rf7 Rc1 27.Bc1 Qe6 28.Rgg7 Bg7 29.Qg7# 1–0. baovn21 – topnotchcon (1630), kurnik, 2011.

5.Nf3 d5 6.Qa4 c6 7.cd5 ed5=.

3.c4 e5

4.a3 a5!?=.

4.a3 a6 5.Be5+= Nc6 6.Bb2 Nf6 7.Nf3. alexp – onamb, net–chess.com, 2018.

4.a3 f6 5.e3=.

4.e3 Bb4 5.Be5 Nf6+=.

4.Be5 Nc6!? 5.Bc3 Nb4=.

4.Be5 f6 5.Bc3+= d5 (5...Nh6+=) 6.Na3 (6.cd5!? Qd5 7.d3+/–) 6...d4= 7.Bb2 Bb4 8.Nc2 (8...Bc5 9.Nf3=). Netto – Ramiz, internet, 2006.

4.Nf3 e4 5.Nd4+=.

4.Nf3 Bf3 5.ef3= g6? (5...Bb4 6.f4 Nc6 (6...ef4?? 7.Bg7 Qg5 8.Bh8+–) 7.fe5 Qh4=) 6.Be5+/– f6 (6...Qe7!? 7.Qe2 f6 8.Bc3+–) 7.Bc3+– Nc6 8.d4 Nge7?? 9.b5 Na5 10.Bd3 Bg7 11.d5 d6 12.0–0 0–0 13.Qe2 c5?? 14.dc6 a6 15.Qe6 Kh8 16.Nd2 ab5 17.cb5 f5 18.Bg7 Kg7 19.Rfe1 Rf6 20.Qe7 Qe7 21.Re7 Rf7 22.Rd7 Rd7 23.cd7 Rd8 24.Nb3 Rd7 25.Nd4 Re7 26.Nc6 Rc7 27.Rc1 Nc6 28.bc6 Ra7 29.c7 Rc7 30.Rc7 Kh6 31.Rc6 d5 32.Rb6 d4 33.g4 Kg5 34.gf5 gf5 35.a4 Kf4 36.a5 Kf3 37.a6 Kf4 38.a7 Ke5 39.a8Q f4 40.Qe4# (40.Qa5#) 1–0. guest31 – guest1020, ICC, 1999.

3.c4 e6

4.a3 c5 5.bc5= Bc5?? (5...bc5 6.Nc3=) 6.d4?? (better is 6.Bg7 Bf2 7.Kf2 Qh4 8.g3+–) 6...Be7= 7.e3 d5 (7...Nh6 8.Nf3=) 8.cd5 Bd5 9.Nc3 Bc6 10.Nf3 f6 (10...Nf6 11.Bd3=) 11.Bb5 (11.Bc4 Qd7+/–) 11...Bb5+= 12.Nb5 Nc6 (12...Qd7 13.Qb3+=) 13.0–0 a6 14.Nc3 b5 15.h3 (15.d5 ed5 16.Nd5 Rc8+=) 15...Nh6 16.Nh4 (16.e4+=) 16...Nf5 (better is 16...Rc8!?=) 17.Qh5+/– Kd7?? (17...g6 18.Ng6! Ng7 19.Qh6=) 18.Nf5 ef5 19.Qf5+– Ke8 20.Nd5 Kf7 21.Nf4 g6?? 22.Qe6 Kg7 23.Qc6 Kh6 24.Ne6 Qd6 25.Qe4 f5 26.Qh4 Bh4–+ (27.d5 Rhe8–+) 0–1. guest237 – guest596, ICC, 1999.

4.a3 d6 5.d3 Nd7 6.Nd2 Ngf6 7.Ngf3 g6 8.e3 Bg7 9.Be2 0–0 10.0–0 Rc8 11.e4 (11.Qa4 c5=) 11...Qe7 (11...Ne4!? 12.Bg7 Nd2 13.Bf8 Nf1 14.Bd6 cd6 15.Qf1 Qf6–/+) 12.Qc2 a6 13.d4 e5 14.de5 de5 15.Rad1 Nh5 16.Rfe1 Nf4 0–1. Turine,Oswaldo (1885) – Vilela,Igor (1970), Campo Grande BRA, Open, 2013.

4.a3 d6 5.d3 Ne7 6.e4 Nd7 7.Nf3 h6 8.Be2 e5 9.Nbd2 Ng6 10.g3 c6 11.a4 a5 12.b5 c5 13.Ng1 Nf6 14.Bh5 Nh5 15.Qh5 Qd7 16.Bc1 0–0–0 17.Nb3 Be7 18.Nh3 Bf6 19.Rb1 Nf8 20.f4?? (better is 20.Be3+=) 20...g6–+ 21.Qf3 Qh3 22.fe5 Be5 0–1. Pilecki,Jozef – Przybylak,Gabriela, Rowy / Fregata Poland, 2009.

4.a3 Ne7 5.e3 d6 (5...a5 6.b5=) 6.Nf3+= Nd7 7.Be2 e5 8.d3 Ng6 9.Nbd2 Be7 10.0–0 0–0 11.h3 (11.d4 a5+=) 11...Bf6 12.e4 c5 13.b5 a6 14.a4 ab5 15.ab5 Nf4 16.Re1 g6 (16...Ra1 17.Qa1 Be7 18.Bc1=) 17.Bf1 Bg7 18.Ra8 Qa8 19.Qa1 Nf6 20.Qa8 Ra8 21.Ra1 Ra1 22.Ba1 Kf8 23.Bc3 Ne6 24.g3 Bh6 25.Kg2 Nd4 26.Bd4 ed4 27.Be2 Bc8 28.g4 Bf4 29.Nf1 Ke7 30.Ng3 h5 31.gh5+= Nh5 32.Nh5 gh5 33.Nh4 Bg5 34.Nf3 f6?? 35.Nh2 h4 36.Nf3 Kf7 37.Ng5 fg5 38.Bf1 Kf6 39.Kf3 Ke5 40.Bg2 Be6 41.Bf1 Bf7 42.Bg2?? Bh5 0–1. Fournier,Frederic (1685) – pecosov, Active, 2008.

4.a3 f5 5.e3 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 Qe8 9.Nc3 d6 10.d4 Ne4 11.Qb3 Nd7 12.Rfd1 Ndf6 13.Nb5 Bd8 14.a4 Ng4 15.Rf1 a6 16.Nc3 a5 17.ba5 Ra5 18.Nb5 Qh5 19.Qd1 (19.h3 Ngf6=) 19...Ng5 (19...Ng3 20.fg3 Bf3–+) 20.h4? (better is 20.h3 Nf6 21.Bc3=) 20...Nf3–+ 21.Bf3 Qh4 22.Bg4 fg4 23.d5 Rf5 24.g3 Qh3 25.Qd4 Bf6 26.Qe4 Rh5 (26...Rh5 27.Rfd1 Bb2–+; 26...Bb2?! 27.Qe6 Rf7 28.Rab1–+) 0–1. Castilla Ayllon (2010) – Vera Gonzalez Quevedo (2535), Mancha Real–B 2nd, 1999. (=1.c4 b6 2.b4 Bb7 3.Bb2 e6)

4.a3 f5 5.e3 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 Qe8 9.d3 d6 10.Ng5 Qd7 11.Qb3 Na6 12.Nd2 c5 13.b5 (13.Bf3 d5 14.b5 Nc7=) 13...Nc7 14.f4 h6 15.Bf3 Bf3 16.Ngf3 Nh7 17.a4 Bf6 18.Ra2 (18.a5 Bb2 19.Qb2 Nf6+=) 18...Bb2 19.Qb2 Qf7 20.Nh4 (20.a5 Nf6+=) 20...Qf6 Black gets the initiative 21.Qf6 Rf6 (21...Nf6 22.a5=) 22.e4 (22.a5 g5 23.Rfa1 Rff8+–) 22...g5 23.e5 (23.fg5 hg5 24.Nhf3 a6=) 23...de5 24.fe5 Rf7 25.Nhf3 Rd8 26.Ne1 g4 (26...Nf8 27.Nb3=+) 27.Rf4 (27.h3 gh3 28.gh3 Rg7 29.Kf2 Ng5=) 27...Nf8=+ 28.Nf1? (better 28.Rf2=+) 28...Ng6–+ 29.Rff2 Ne5 30.Rad2 (30.a5 Nd3 31.Rfd2 Rfd7 (31...Ne1? 32.Rd8 Kg7 33.ab6 ab6 34.Re2+–) 32.Nd3 Rd3 33.ab6 ab6 34.Rd3 Rd3–+) 30...Rd4 (30...Rfd7 31.a5–+) 31.Ng3? (better 31.Rfe2 Ng6 32.Nc2–/+) 31...Rfd7–+ 32.Ne2 (32.Nf1 Nd3 33.Nd3 Rd3–+) 32...R4d6 (better 32...Rc4!? 33.Rf4–+) 33.Nf4 Ne8 (better 33...Nc4 34.Rde2 Na5–+) 34.Rde2–/+ Nf7 (better 34...g3 35.hg3 Ng4=+) 35.Ne6+– (35.Re6?! Re6 36.Ne6 Re7=) 35...Ng7 36.Ng7 Kg7 37.Rf5 Rf6 38.Rf6 Kf6 39.Kf2 Ne5 40.Ke3 Kg5 41.Rf2 (41.h3 gh3 42.gh3 Kh4+=) 41...Re7 (41...g3!? 42.h4 Kh4=) 42.Kd2+= h5 43.g3 Rd7 44.Kc3 h4 (44...Re7!?+=) 45.gh4+– Kh4 46.Ng2 (better 46.Rf5 Nf7 47.Ng2 Kh3 48.Ne3+–) 46...Kg5= 47.Nf4 (47.Re2 Nd3 (47...Rd3? 48.Kc2+–) 48.Re8 Rd4=) 47...Nf3=+ 48.Nh3 (48.Ne6 Kf5 49.Re2 Re7–/+) 48...Kh4–/+ 49.Nf4 Kg5 (49...Nh2!? 50.Ng6 Kh3=+) 50.Nh3= Kh4 51.Nf4 Ne5 (51...Nh2!? 52.Ng6 Kg3=+) 52.Ng2 (52.a5!?+=) 52...Kg5= 53.Nf4 Nf3 54.Ng2 (54.Nh3 Kh4=) 54...Nh2 (54...Rh7 55.Ne3=+) 55.Ne3 (55.Rf8 Re7=+) 55...g3 (55...Nf3 56.Rg2 Rd4 57.Nc2–/+) 56.Rf5 Kh4 57.Kd2 (57.a5!? Re7 58.Ng2 Kh3 59.Nf4 Kg4 60.Rf8–/+) 57...Rg7–/+ 58.Rf6 (58.Kc3!?–/+) 58...g2–+ 59.Ng2 Rg2 60.Kc3 Rg7 (60...Ra2 61.Kb3 Rd2 62.Kc3–+) 61.Rh6 Kg3 62.Rf6 (62.a5 Ng4 63.Re6 Rd7 64.ab6 ab6 65.Rb6 Ne5–+) 62...Ng4 63.Re6 (63.Rd6 Re7–+) 63...Rd7 64.Re2 (64.a5 ba5 65.Rc6 Nf2–+) 64...Nf2 (64...Kf4 65.Kc2–+) 65.Re3 Kf4 66.Kd2 Ng4 67.Re4 (67.Rh3 Ne5 68.Kc3 Rd4–+) 67...Kf5 68.Re2?! (68.Kc2 Rd4 69.Rd4 cd4–+) 68...Ne5 69.Rf2 (69.Kc2 Nd3 70.Rd2 Nb4 71.Kc1 Rd4–+) 69...Kg4 (69...Ke6 70.Kc2 Rd3 71.Re2–+) 70.Re2 (70.Ke3 Nd3 (70...Rd3?! 71.Ke4–+) 71.Rd2 Ne5 72.Rd7 Nd7–+) 70...Nc4 (70...Rd3?! 71.Kc2=+) 71.Kc3 Na5 (71...Kf3 72.Re1 Ne3 73.Kd2–+) 72.Re6 (72.Re4 Kf5–+) 72...Nb7 (72...Rd4!? 73.Rg6 Kf5 74.Rg7 Ra4 75.Rf7 Ke6 76.Ra7–+) 73.Re1 Nd8 74.Re4 (74.Re5 Rd4 75.Re8 Kf5–+) 74...Kf3 (74...Kf5 75.Kd2–+) 75.Kc4 Nf7 76.Kc3 Ng5 77.Rh4 (77.Re5 Nh3–+) 77...Kg3 (77...Ke3 78.Kc2–+) 78.Rh1 (78.Rh6 Nh3–+) 78...Nf3 79.Rd1 (79.Rh8 Ne5 80.Re8 Kf4 81.Rf8 Kg5 82.Rg8 Kf6 83.Rf8 Ke7–+) 79...Kf2 80.Kc2 Ke2 81.Kc1 (81.Rh1 Ne1 82.Kb2 Rd4–+) 81…Rd4 (81...Rd4 82.Rh1 Ra4–+) 0–1. petrobbo (2025) – Supermalc (1960), ChessWorld.net, 2011.

4.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.c4 Bb7).

4.a3 Nf6 5.e3 d5 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.c4).

4.a4 Bb4?? 5.Bg7 Qg5 6.Bh8 Bg2 7.Nh3 Bh3 8.Bh3 +–.

4.a4 Nf6!? 5.b5 a6+=.

4.b5 Bc5 5.Bg7 Qh4 6.g3 (6.e3 Be3 7.de3 Bg2 8.Bg2 Qg5 9.Bh8 Qg2+–) 6...Qc4 7.e3 (7.Bh8?! Bh1 8.e3 Qe4+=) 7...Qb4 8.Nf3 (8.f3 Bf3 9.Nf3+–) 8...Ne7?? (better is 8...Qg4 9.Bh8 Bf3+–) 9.Bh8 d6 10.Bc3 Qg4 11.Bg2 Nd7 (11...a6 12.d4 ab5 13.dc5 bc5 14.Qe2+–) 12.0–0 (12.d4 0–0–0+–) 12...0–0–0 (12...a6 13.d4 ab5 14.dc5 Nc5+–) 13.d4 Bd4 14.Bd4 Qh5 15.Nbd2 Qb5 16.Rb1 Qh5 17.Nh4 (17.Nc4 e5 18.Rb5 Bd5 19.Nfe5 Qd1 20.Rd1 de5 21.Ne5 Bg2 22.Kg2 Ne5 23.Re5 Ng6+–) 17...Qa5 (17...Qd1 18.Rfd1 e5 19.Bb2+–) 18.a4 Bc6 19.Ra1 Rg8 20.Bc6 Nc6 21.Qf3 (21.Nb3 Qg5 22.Nf3 Qg6+–) 21...d5 (21...Nd4 22.ed4 Qd2+–) 22.Qf7 Rf8 23.Qe6 Nd4 24.ed4 Qd2 25.Rad1 (25.Qd5!? a5+–) 25...Qa2 26.Qd5 (better is 26.Nf5 Kd8 27.Rc1+–) 26...Qd5–+ (27.f4 Qc4–+) 0–1. valpa – unclcarle, playchess.de, 2003.

4.b5 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.c4 Bb7).

4.Nc3 Bb4!? 5.a3 Bc3 6.Bc3 Nf6–/+.

4.Nc3 Bb4!? 5.Qb3 Na6–/+.

4.Nc3 d6 5.d4 g6 6.Nf3 Bg7 7.e3 Nd7 8.Bd3 Ngf6 9.0–0 0–0 10.Qc2 a6 11.Nd2 c5 12.Nce4 cb4 13.Nd6 Bc6 14.e4 e5 15.Rae1 ed4 16.Bd4 Nc5 17.e5 Nfd7 18.f4 Nd3 19.Qd3 Nc5 (19...Qc7) 20.Qe3 f6 (20...Qd7) 21.Bc5 bc5 22.Qc5 Ba4? (22...Qc7) 23.N2e4 fe5 24.Ng5 Bd7 25.Qd5 Kh8 26.Ngf7 1–0. Wall,Bill – Guest1853862, playchess.com, 2012.

4.d3 Bb4!? 5.Nd2 Nf6–/+.

4.d4 Bb4!? 5.Bc3 Be7–/+.

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

4.f3 Qh4 5.g3 Qc4 6.a3+=.

4.Nf3 (--> 3.Nf3 e6 4.c4).

4.b5 a6

5.a4 c6 6.Nc3 Nf6 (6...d5 7.cd5 ed5 8.e3 Nf6 9.Nf3 Bd6 10.Be2 0–0 11.0–0 Re8=; 6...ab5 7.ab5 Ra1 8.Qa1 d5 9.bc6 Nc6 10.cd5 ed5 11.Nb5 f6=) 7.Nf3 Bb4 8.e3 0–0 9.Be2 d5 10.cd5 Nd5 11.0–0 Qd6=.

5.a4 c6 6.e3 Nf6 7.Nf3 Be7 8.Be2 d5 9.0–0 0–0 10.d3 dc4 11.dc4 Qc8=.

5.a4 c6 6.Nf3= Nf6 (6...d5 7.cd5 ed5 8.e3 Nf6 9.Be2 Bd6 10.0–0 0–0 11.Nc3 Re8=) 7.e3 (7.Nc3 Bb4 8.e3 0–0 9.Be2 d5 10.cd5 Nd5 11.0–0 Qd6=) 7...Be7 (7...d5 8.Nc3 dc4 9.Bc4 Bd6 10.e4 Nbd7 11.0–0 Ne5=) 8.Be2 0–0 (8...d5 9.0–0= 0–0 10.d3 dc4 11.dc4 Qc8=) 9.0–0 d5 10.Nc3 (10.d3 dc4 (10...Bd6 11.Nbd2 c5=) 11.dc4 Qc8= (11...Nbd7=)) 10...dc4 11.Bc4 Qc7 (11...ab5=) 12.Qe2 cb5 (12...Rd8 13.d4=) 13.ab5 Nbd7 (13...a5 14.Rfc1=) 14.d4 (better is 14.ba6!? Bf3 15.gf3+/–) 14...Rfc8 (14...Bf3 15.gf3 Rfc8 16.Bd3 ab5 17.Nb5=) 15.Bd3+= Bb4 (15...ab5 16.Nb5 Qd8 17.e4+=) 16.Rfc1 (better is 16.Na2 a5 17.Nb4 ab4 18.Ra8 Ra8 19.Rc1+/–) 16...Qd6? (better is 16...ab5 17.Ra8 Ra8 18.Nb5 Qd8+=) 17.ba6+– Bf3 (17...Bc6 18.Ne5!+–) 18.Qf3 e5? 19.Nb5 Qe7 20.Rc8 Rc8 21.Qb7 Rb8 22.Qb8! Nb8 23.a7 Qa7 24.Ra7 g6 25.de5 (25.de5 Nfd7 26.Rc7+–) 1–0. Zornack,Andre (1990) – Gottwald,Bernhard (1925), RSS5E NoEngine–98, 2009.

5.a4 Nf6 A) 6.Nf3+= Be7 (6...Bd6 7.e3 0–0 8.Be2 Ng4 9.h3 Nf6 10.0–0 Bb4 11.d4 Qe7=; 6...Bb4 7.Qb3 Be7 8.Nc3 0–0 9.d4 Bf3 10.ef3 ab5 11.ab5 Ra1=; 6...Bc5 7.e3 0–0 8.Be2 d5 9.cd5 Nd5 10.0–0 ab5 11.ab5 Ra1=) 7.e3 0–0 8.Nc3 d5 9.d4 Bb4 10.Qb3 c5 11.dc5 bc5+=; B) 6.Qb3 Bd6 (6...Be7 7.Nf3 0–0 8.Nc3 Ne4 9.Ne4 Be4 10.d3 Bb7 11.e3 Re8=; 6...ab5 7.ab5 Ra1 8.Ba1 Bd6 9.Nf3 0–0 10.Qd3 Bc5 11.Nc3 Re8+=; 6...Bc5 7.d4 Be7 8.Nc3 0–0 9.Nf3 Bf3 10.ef3 ab5 11.ab5 Ra1=) 7.a5 ba5 8.Ra5 0–0 9.ba6 Ba6 10.c5 Be7 11.Qa3 Qc8+=; C) 6.Nc3 Bb4 (6...Be7 7.e3 e5 8.d3 Bb4 9.Nf3 e4 10.Nd2 0–0 11.de4 Be4+=; 6...Bc5 7.Nf3 0–0 8.e3 d5 9.cd5 Nd5 10.Bc4 c6 11.Nd5 cd5=; 6...Bd6 7.Nf3 0–0 8.e3 Qe7 9.Be2 e5 10.d3 ab5 11.ab5 Ba3=) 7.Nf3 0–0 8.e3 Ne4 9.Ne4 Be4 10.Be2 d5 11.0–0 dc4+=.

5.Nf3 A) 5...Nf6 6.e3 Be7 (6...ab5 7.cb5 Bd5 8.Nc3 Ba3 9.Ba3 Ra3 10.Nd5 Nd5 11.Qc1 Qf6=; 6...Bc5 7.Be2 d5 8.ba6 Ba6 9.cd5 Nd5 10.Nc3 Be2 11.Qe2 0–0=; 6...Bb4 7.Be2 0–0 8.0–0 d5 9.d3 dc4 10.dc4 Qe7 11.Qb3 Nbd7=) 7.Be2 d5 8.0–0 dc4 9.Bc4 ab5 10.Bb5 c6 11.Bc4 0–0+=; B) 5...ab5 6.cb5 c6 (6...Nf6+= 7.e3 Bb4 8.Be2 Ra5 9.a3 Bd6 10.Nc3 Qe7 11.Qb3 0–0=; 6...Ra5 7.e3 Nf6 8.Bc3 Ra7 9.Bc4 c5 10.bc6 dc6 11.0–0 Bd6=; 6...Ra7 7.e3 Nf6 8.Bc4 d5 9.Bd3 Bd6 10.Qc2 c5 11.bc6 Bc6=) 7.e4 cb5 8.Bd3 b4 9.0–0 d5 10.e5 Bc5 11.Nd4 Nh6 +=.

4.e3

4.e3 (--> 3.e3 e6 4.c4).

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

4.e3 Nf6

5.a3 c5 6.b5 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6 6.c4 Bb7).

5.a3 Be7 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

5.a3 Be7 6.Nf3 0–0 7.Be2 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0–0 7.c4).

5.b5 a6 6.a4 Be7 7.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 a6 7.a4).

5.b5 c5 6.Nf3 d5 7.Be2 Nbd7 8.0–0 Bd6 9.d3 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).

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

5.b5 d5 6.Nf3 Be7 7.a4 0–0 8.Be2 Nbd7 9.0–0 c5 (--> 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).

5.b5 Be7 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

5.b5 Be7 6.Nf3 0–0 7.Be2 d6 8.0–0 Nbd7 (-->1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.Be2 d6 8.0–0 Nbd7).

5.b5 Be7 6.Nf3 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7).

3.c4 f5

4.e3 Nf6 5.a3 e6=.

4.e3 Nf6 5.d4 g6 (5...e6 6.a3=) 6.Nf3 Bg7 7.d5 (7.Be2 c5+=) 7...0–0 8.Bd3 (8.Be2=) 8...d6 (8...e6!?=) 9.0–0 (9.Nd4 Bc8 10.b5+=) 9...Nbd7 (9...e5 10.de6 Qe7 11.Nbd2+=) 10.Nbd2 (10.Ng5 Qc8+/–) 10...h6 (10...Ne5 11.Ne5 de5 12.Be5 e6+=) 11.Qb3 (11.Nd4 Qc8+/–) 11...Kh7? (11...a5 12.a3 a4 13.Qd1+=) 12.g3 (better is 12.Nd4+–) 12...a5 13.a3 Qe8 14.Nh4 e6 15.de6 Qe6 16.Be2 Rad8 17.Bf3 Bf3 18.Nhf3 ab4 19.ab4 Ne5 20.Nd4 Qd7 21.N2f3 Ne4 22.Rfd1 g5 23.Ne5 Be5 24.Nf3 Bb2 25.Qb2 f4 26.ef4 gf4 27.Qc2 Rde8 28.Nd2 Qf5 29.Ne4 Re4 30.Rac1 f3 31.Qd3?? Kh8 32.Qf1 Re2+= 33.Re1 Rfe8 34.Re2 fe2 35.Qe1 Qf3 36.Qd2 Kh7 37.Re1 Re5 38.h4 Kg7 39.Qb2 Kf7 40.Qd2 Ke7 41.Qh6= Kd7 42.Qh7 Kc6 43.b5 Kc5?? 44.Qc7+– Kb4 45.Qd6 Rc5 46.Qd2 Kc4 47.Qe2 Qe2 48.Re2 Rb5 49.Re4 Kd3 50.Re3 (50.Re3 Kc4 51.g4+–) 1–0. ludice (1760) – sacaniev, kurnik, 2011.

4.e3 Nf6 5.Nf3 e6 6.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 b6 5.e3 Bb7 6.Nf3).

4.Nf3 e6 5.g3 (5.b5 h6+=) 5...Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.Qb3 (6.b5 d5=) 6...Nc6 7.a3 (7.b5 Na5 8.Qc3 a6+=) 7...Ne7 (7...a5!?+= is interesting) 8.Bg2 Ng6 9.d3 Controls e4 (9.0–0 Be7=) 9...f4 (9...Bd6 10.h4=) 10.Nbd2 c5 (10...a5 11.0–0+=) 11.Bc3 (11.0–0 Be7+=) 11...Qc7 12.Qb2 Be7 13.bc5 bc5 14.Rb1 Bc6 15.0–0 0–0 16.Ne5 fg3 17.hg3 ½–½. Degenhardt,Horst (2360) – Grosshans,Ralf Michael (2175), Karl Mala Memorial op, 2000. (=1.c4 b6 2.b4 Bb7 3.Bb2 f5)

3.c4 f6

4.a4 g6 5.e3 Bg7 6.Nf3 Nh6 7.Be2 Nf7 8.d4 0–0 9.d5 d6 10.b5 f5 11.Bg7 Kg7 12.a5 ba5 13.Ra5 Nd7 14.Nc3 Nc5 15.0–0 c6 16.bc6 Qa5 17.cb7 Nb7 18.Qd2 Nc5 19.Qc2 Rab8 20.Nd4 Qa6 21.Nc6 Rb7 22.e4 Ne4 23.Ne4 fe4 24.Qe4 Re8 25.f4 Nd8 26.f5 Nc6 27.dc6 Rc7 28.fg6 hg6 29.Bd3 Qc6 30.Qg6 Kh8 31.Qh7 1–0. arti000 – mehmet22, kurnik, 2012.

4.b5 d5 5.cd5 Qd5 6.Nc3 Qd8 7.e3 e5 8.Nf3 Bb4 9.Nh4 Ne7 10.Qh5 Kd7?? (better is 10...g6 11.Qh6 Kd7+=) 11.Qg4+– Ke8 12.Qb4 Nd5 13.Nd5 Qd5 14.Rc1 c5 15.bc6! Nc6 16.Qc4 Qc4 17.Bc4 Na5 18.0–0 Nc4 19.Rc4 Kd7 20.Rfc1 Rac8 21.d4 ed4 22.Rd4 Ke6 23.Rcd1 Rc2 24.Rd6 Kf7 25.Rd7 Ke6 26.R1d6# 1–0. typ48 – tazlanda, kurnik, 2012.

4.Nc3 e5 5.a3 Bd6 6.e3 Ne7 7.Rc1 0–0?? (7...Ng6 8.Nf3=) 8.Nf3?? (8.c5 Bc5 9.bc5 Kh8+–) 8...a5?? (8...e4 9.Ne4 Be4 10.c5 bc5 11.bc5 Bc5 12.Rc5=) 9.b5?? (better is 9.c5 ab4 10.cd6 bc3 11.de7 Qe7 12.Rc3+–) 9...c6 10.a4 Bb4 11.Be2 Bc3 12.Bc3 cb5 13.ab5 a4 14.0–0 a3 15.Qb3 d5 16.Ra1 dc4 17.Bc4 Bd5 18.Ra3 Ra3 19.Bd5 Qd5 20.Qa3 Re8 21.d4 ed4 22.Nd4 Ng6 23.Qa7 Qc4?? 24.Ba1 Qc5 25.Qa2 Kh8 26.Ne6 Qb5? 27.Nc7+– Qd7 28.Ne8 Qe8 29.Qa8 Ne7 30.Rb1 Qd8 31.Bd4 Nec6 32.Rb6 h6 33.Rb7 Qd6 34.g3 Qd5 35.Rb8 Nb8 36.Qd5 (36.Qd5 Na6 37.Qa8 Kh7 38.Qa6+–) 1–0. slax1 – zorro5, kurnik, 2011.

4.Nc3 g6 5.b5 Bg7 6.Nf3 f5 7.g3 Bf3 8.ef3 d6 (8...Nf6 9.Bg2=) 9.Bg2 Nd7 10.0–0 Nc5 (better is 10...f4!?+/–) 11.d4 Nd7 12.f4 Rb8 13.d5 (13.Re1 Kf7+–) 13...Ndf6 14.Qd2 Nh6 15.Rfe1 0–0 16.Re6 Qd7 17.Rae1 Rbe8 18.a4 Nhg4 19.f3 (19.f3 Nh6 20.Qe3+–) 1–0. kannisogoet – faduss, kurnik, 2012.

4.c5 bc5 5.bc5 e5 6.Qb3 Bc6 7.e3 (better is 7.d4!? Na6 8.Qa3=) 7...Bc5–/+ 8.Bc4? (8.Qc2 d6–/+) 8...Ne7 (better is 8...Bg2 9.Bf7 Ke7–+) 9.Bf7–/+ Kf8 10.Qc4?? (10.Nf3 Bf3 11.gf3 Nbc6–/+) 10...Bb6 (better is 10...Bg2 11.Bh5 d5 12.Qc5 Bh1–+) 11.e4 a5 12.Bh5? d5–+ 13.Qb3 g6 14.Be2 de4 15.Nc3 e3 16.de3 Bg2 17.Bf3 Bh1 18.Bh1 c6 19.Ne4 Kg7 20.Nh3 Na6 21.Rd1 Qg8?? 22.Qb6= Qa2 (22...Qa2 23.Qb7 Qf7+/–) 0–1. nakpim – gizehi27, kurnik, 2012.

4.d3 g6 5.e4 Bg7 6.a4 Nh6 7.Nf3 0–0 8.Be2 Nf7 9.Nc3 Nc6 10.b5 Nb8 11.0–0 d6 12.Qc2 Nd7 13.Nd5 Bd5 14.ed5 Nc5 15.Ba3 Nd7 16.Nd4 f5? (better is 16...Re8+–) 17.Ne6 Qc8 18.Nf8 Ba1 19.Nd7 Qd7?? (better is 19...Bd4+/–) 20.Ra1+– Ne5 21.Bb2 Nf7 (21...e6+–) 22.Qc3 a6 (22...Ne5 23.f4 e6+–) 23.Qg7# 1–0. tyop (1785) – mehmet22, kurnik, 2012.

4.d4 d6 5.d5+= Qd7 6.b5 e6 7.e4 ed5 8.ed5 Qe7 9.Be2 Nd7 10.Nf3 0–0–0 11.0–0 Ne5 12.Ne5 fe5 13.Na3 Kb8 14.Nc2 Nf6 15.Nb4 g5 16.Qa4 h5 17.Nc6 Bc6 18.bc6 Ka8 19.Qa6 Rb8 20.a4 Ne4 21.Ba3 Qe8 22.a5 Qc8 23.Qb5 a6 24.Qb2 Bg7 25.Rfb1 Ka7? 26.Bb4 Rf8 27.Be1 Nc5 28.ab6 Rb6 29.Qa2 e4 30.Ba5 Rb1 31.Rb1 Bd4 32.Bh5?? Bf2?? 33.Kh1+= Bd4 34.Bb4 Rf2 35.Bc5+= Bc5 36.Rb7?? Qb7–+ 37.cb7 Ra2 (37...Ra2 38.h3 e3–+; 37...Rf1#) 0–1. typ48 – horse20, kurnik, 2012.

4.d4 d6 5.d5 e5 6.e4 g6 7.Bd3 Bg7 8.b5 Ne7 9.a4 a5 10.Ne2 Nd7 11.0–0 Nc5 12.f4 Nd3 13.Qd3 0–0 14.Nd2 Bc8 15.Nf3 Bg4 16.h3 Bf3 17.Rf3 (worse is 17.gf3 f5+=) 17...Qd7 18.Raf1 Bh6 19.fe5 fe5 20.Ng3 Rf3 21.Rf3 Rf8 22.Rf8 Bf8 23.Bc1 Bg7 24.Bg5 h6 25.Be7 Qe7 26.Qf3 Kh7 27.Kh2 Bf6 28.Ne2 Bg5 29.g3 Bd2 30.Qg4 Kg7 31.Kg2 Bg5 32.h4 Bf6 33.Qc8 g5 34.h5 Qd8 35.Qe6 Qe7 36.Qf5 Qf7 37.g4 Bd8 38.Ng3 Qf5 39.Nf5 Kh7 40.Kf3 Bf6 41.Ne3 Bd8 42.Ng2 Bf6 43.Ne1 Bd8 44.Nd3 Bf6 45.Nf2 Bd8 46.Nd1 Bf6 47.Ne3 Bd8 48.Nf5 Bf6 49.Ke3 Bd8 50.Kd3 Bf6 51.Kc3 Bd8 52.c5 dc5 53.d6 cd6 54.Nd6 Kg7 55.Kc4 Kf6 56.Kd5 Be7 57.Nc4 Bd8 58.Ne5 Bc7 59.Nd7 Ke7 60.Kc6 Bd8 61.Ne5 Ke6 62.Nc4 Ke7 63.Kd5 Bc7 64.e5 Kd7 65.Ne3 Ke8 66.Nf5 Kf7 67.Nh6 Kf8 68.Nf5 c4 69.h6 Kg8 70.Ne7 Kh7 71.Kc4 Be5 72.Kd5 Bf4 73.Nf5 Bh2 74.Kc6 (74.Kc6 Bg1 75.Nd6 Kh6 76.Nc4+–) 1–0. typ48 – maistortsche (1680), kurnik, 2012.

4.d4 e5 5.de5 Bb4 6.Nd2 f5 7.e3 Qg5 8.Ngf3 Bf3 9.Qf3 Nc6 10.Rd1 0–0–0 11.Be2 Nge7 12.0–0 Bd2 13.Rd2 Ng6 14.Rfd1 Nh4 15.Qg3 Qg3 16.hg3 Ng6 17.f4 Rhe8 18.Bf3 Na5 19.Be2 Ne7 20.Bc3 Nb7 21.Bd3 g6 22.e4 Nc5 23.ef5 Nd3 24.Rd3 Nf5 25.g4 Ne7 26.Kf2 c5 27.Kf3 Nc6 28.Ke4 Ne7 29.f5 gf5 30.gf5 Ng8 31.Bd2 h6 32.f6 Nf6 33.Kf5 Ng8 34.Kg6 Re5 35.Bh6 Re6 0–1. kaasparov – bekimi70, kurnik, 2012.

4.d4 e6 5.a3 d6 6.Nd2 Nd7 7.Ngf3 Ne7 8.e4 c5 9.d5 ed5 10.ed5 Ne5 11.Ne5 fe5 12.Bd3 Ng6 13.Qh5 Qf6 14.Bg6 Qg6 15.Qg6 hg6 16.0–0 Bc8 17.Ne4 Bf5 18.Ng5 Be7 19.Ne6 Be6 20.de6 Bf6 21.f4 Ke7 22.f5 gf5 23.Rf5 Ke6 24.Raf1 Raf8 25.b5 Rh4 26.R5f4 ef4 27.Bf6 Rf6 28.h3 f3 0–1. kaasparov – denizam1, kurnik, 2012.

4.d4 e6 5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Ne7 9.e3 Nf5 10.Nf3 Bb4 11.Bc3 Qe7 12.Be2 Bc3 13.Nc3 Qb4 14.Qd2 0–0 (14...Nd6!?=) 15.0–0+/– Nd6 16.Ne4 Qd2 17.Ned2 c5 (17...Rc8 18.c5 bc5 19.dc5 Bf3 20.Nf3+/– (worse is 20.Bf3 Nb5 21.Rb1 c6+=; 20.gf3?! Ne8+=)) 18.dc5+/– bc5 19.Nb3 Ne4 20.Bd3 d5? 21.Be4+– de4 22.Nfd2 Rd8 23.Ra1 Nd7 24.g3 Ne5 25.Nc5 Rd2+/– 26.Nb7 Nd3?? 27.b6 Nf2 28.Nc5 Nh3 29.Kf1 Rf2 30.Ke1 Rh2 31.Ra8 Kf7 32.b7 Rb2 33.b8Q Rb8 34.Rb8 Ng5 35.Rb7 Kg6 36.Ke2 e5 37.Nd7 Nf3 38.c5 Ng1 39.Kf2 Nh3 40.Kg2 Ng5 41.c6 Ne6 42.c7 Nc7 43.Rc7 Kf5 44.Ne5! fe5 45.Rg7 h5 46.Kh3 Kf6 47.Rb7 Kg5 48.Rb5 Kf5 49.Kh4 Kg6 50.Re5 Kf6 51.Re4 Kf5 52.Kh5 Ke4 53.g4 Ke3 54.g5 Ke4 55.g6 Kf5 56.g7 Kf6 57.g8Q Kf5 58.Qg4 Ke5 59.Qf3 Ke6 60.Qf4 Kd5 61.Kg5 Ke6 62.Qf5 Kd6 63.Kf6 Kc6 64.Qe5 Kd7 65.Qe6 Kc7 66.Ke7 Kb7 67.Kd7 Ka7 68.Qb3 Ka6 69.Kc6 Ka5 70.Qb5# 1–0. ludice (1655) – samusvm (1615), kurnik, 2011.

4.d4 e6 5.b5 Be7 6.Nd2 Nh6 7.e4 d6 (7...0–0 8.Bd3=) 8.Be2 (8.Qh5!? Nf7 9.Qg4+/–) 8...Nd7 9.Ngf3 0–0 10.0–0 f5 (10...a6 11.Qb3+=) 11.e5 (11.ef5 Nf5 12.Bd3 Bf6+/–) 11...de5 12.de5 Ng4 13.h3 Nh6 14.Qc2 Nc5 15.Nb3 Ne4 16.Bd3 Kh8 17.Nfd4 Qd7 18.f3 Ng3 19.Kh2?? Nh5?? 20.Bc1 Nf7 21.g4 Ne5–/+ 22.gh5 Nd3 23.Qd3 Rad8?? 24.Bf4 Bc5?? 25.Rae1?? Bd4= 26.Nd4 Qd4 27.Qd4 Rd4 28.Be5 Rd2 29.Kh1 Ra2 30.Bc7 h6 31.Re6=+ Rc2 32.Be5 Rf7 33.Rg6 Kh7 34.Kg1 Rc4 35.f4 Rb4 36.Kh2 Rb5 37.Rfg1 Rd5?? 38.Rg7+– Rg7 39.Rg7 Kh8 40.Rb7 Kg8 41.Ra7 Rd2 42.Kg3 b5 43.Rb7 Rd3 44.Kf2 1–0. cry – chaser, Live Game Caissa's Web, 2004.

4.e3 d5 5.b5 (5.cd5 Bd5 6.Nc3 Bb7+=) 5...dc4= 6.Nf3 (6.Bc4?? Bg2 7.e4 Bh1 8.Qh5 g6–+) 6...Bd5 7.Na3 (7.Qc2!?=) 7...e5+= 8.Bc4 Ba3 9.Bd5 Bb2 (better is 9...Qd5 10.Ba3 Qb5+=) 10.Rb1?? (better is 10.Ba8 Ba1 11.Qa1=) 10...Qd5–+ 11.Rb2 Nd7 12.0–0 Ne7 13.d4 e4 14.Nd2 0–0 15.Qc2 f5 16.Qc7 Rfc8 17.Qf4 g6 18.h4 Nf6 19.g3 Nh5 20.Qg5 Qd6 21.Kg2? Kg7 22.f3 h6 23.Ne4 Qa3 24.Rb3 Qa2 25.Rf2 Qf2! 26.Nf2 hg5 27.hg5 Rc2 0–1. carocan (1835) – atthoss, kurnik, 2011.

4.e3 d6 5.d4 e5 6.d5 g6 7.b5 Bg7 8.f4 a6 9.fe5 fe5 10.Nf3 ab5 11.cb5 Nd7 12.Nbd2 (12.e4 Ngf6 13.Nc3 Bh6+=) 12...Nc5 13.Bc4 h6 (13...Nf6 14.Nb3 Na4 15.Bc1–/+) 14.Nb3 Nf6 (better is 14...Na4!? 15.Qc2 Nb2 16.Qb2 Nf6=) 15.Nc5+/– bc5 16.a4 Ra7 17.a5 Qa8 18.a6 Bd5 19.Bd5 Qd5 20.Qd5 Nd5 21.e4 Nb6 22.Nh4 g5 23.Nf5 Kf7 24.0–0 Bf6 25.Ne3 Kg6 26.Ng4 Bg7 27.Rf5 Raa8 28.Raf1 Rhf8 29.Rf8+= Rf8 30.Rf8 Bf8 31.a7 Bg7 32.Bc3 Kf7? 33.Ba5 Na8 34.Ne3 Ke6 35.Nd5 White intends b6 35...Kd7 36.b6 Kc8 37.Nc7 Kb7 38.Na8 Ka8 39.Kf2 Kb7 40.Ke3 Bf6 41.Kd3 Bd8 42.Kc4 h5 43.Kd5 h4 44.Kd6 c4 45.Kc5 c3 46.Bc3 Bb6 47.Kd5 Ka7 48.Be5 Bd8 49.h3 Kb7 50.Ke6 Kc8 51.Bf6 Kc7 52.Bd8 Kd8 53.Kf6 Kd7 54.Kg5 Ke6 55.Kh4 Ke5 56.Kg4 Ke4 57.Kg5 Ke5 58.g4 Ke6 59.Kg6 Ke7 60.Kg7 Ke6 61.g5 Kf5 62.h4 Kg4 63.g6 Kh4 64.Kh6 Kg4 65.g7 Kf5 66.g8Q Kf6 67.Qg6 Ke5 68.Qf7 Ke4 69.Qf6 Kd5 70.Kg5 Ke4 71.Qf5 Kd4 72.Kf4 Kc4 73.Qe5 Kd3 74.Qe4 Kc3 75.Ke3 Kb3 76.Qc6 Kb4 77.Kd3 Kb3 78.Qb6 Ka4 79.Kc3 1–0. dtpwaldi – maistortsche (1690), kurnik, 2011.

4.e3 e5 5.a3 d5 6.cd5 Bd5 7.Nc3 Bb7 8.Nf3 Bd6 9.d4 e4 10.Nd2 f5 11.Bc4 Nf6 12.0–0 Nc6 13.g3 Ne7 14.Qb3 c6 15.Bf7 Kf8 16.Rac1 h5 17.Bc4 b5 18.Be2 h4 19.f3 ef3 20.Rf3 c5 21.dc5 Bf3? 22.Bf3 Be5+/– 23.Ba8 Qd2 24.Qc2 Qe3 25.Qf2 Qf2 26.Kf2 hg3 27.Kg1 Rh2 28.Bg2 Bd4 29.Kf1 Ng4 30.Nd1 Be3 31.Rc3 f4 32.Re3?? fe3 33.Nc3 Nf6 34.Ne2 Nh5 35.Be5 Nf5 36.c6–/+ Ke7 37.c7 Kd7 38.Kg1? Ne7–+ 39.Ng3 Ng3 40.Kh2–/+ Ne2 41.Bh3+= Kc6 42.c8Q Nc8 43.Bc8 Kd5 44.Bg7 Ke4 45.Bh6 Nf4?? 46.Bb7+– Ke5 47.Bf4 Kf4 48.Kg2 Ke5 49.Kf1 Kd4 50.Ke2 Kc3 (50...Kc3 51.Ke3 Kc4+–). carpaticus (1775) – peter62 (1730), kurnik, 2012.

4.e3 e5 5.Qb3 Ne7 6.Nf3 d6 (6...a5 7.b5=) 7.Be2 g6 (7...a5 8.ba5 Ra5 9.d4+=) 8.d4 Bg7 9.0–0 0–0 10.b5 Kh8 11.Nbd2 Nd7 12.a4 Rc8 (12...a6!?+=) 13.a5+/– c6 14.bc6 (14.ab6 ab6 15.Ne4 Qc7+/–) 14...Nc6 15.ab6 ab6 16.d5 Na5 17.Qa3 Nc5 18.Bc3 Ra8 19.Qb2 f5 Black prepares the advance e4 20.Rfb1 Bc8?? (better is 20...Ra6+=) 21.Qb6+– Qb6 22.Rb6 e4 23.Bg7 (better is 23.Nd4 Ncb7 24.N2b3 Nb3 25.Ra8+– (25.Rb3?! Ra1 26.Ba1 Rf7+–; 25.Nb3?! Ra1 26.Ba1 Ba1 27.Na1 g5+/–)) 23...Kg7+/– 24.Nd4 Kf6?? 25.Rd6+– Kg5 26.g3 h5? 27.h4 Kh6 28.Nc6 Nc6?? 29.Ra8 Ne5 30.Rb6 Ncd7 31.Rd6 Rd8?? 32.Nb3 Nf7 33.Rc6 Nfe5 34.Rcc8 Rc8 35.Rc8 1–0. orangutanb4 (1980) – rodebert (1650), kurnik, 2011.

4.e3 e5 5.b5 Bb4 6.Nf3 Ne7 7.a3 Ba5 8.Be2 d5 9.0–0 0–0 10.Qb3 a6 11.a4 ab5 12.ab5 Qd6 13.Ba3 Qd7 14.Be7 Qe7 15.cd5 Qd6 16.e4 f5 17.d3 fe4 18.de4 h6 19.Nbd2 Nd7 20.Nc4 Qc5 21.Nce5 Ne5 22.Ne5 Kh7 23.Rfc1 Qd4 24.Nd7 Qf2 25.Kh1 Qe2 26.Nf8 Rf8 27.h3 Rf2 28.Rg1 Bc8 29.Qg3 Rf7 30.e5 Bf5 31.e6 Re7 32.Qf4 g6 33.Qh4 Bb4 34.Rac1 Bd6 35.Qf6 Qe5 36.Qe5 Be5 37.Rc6 Bd6 38.Rd1 Be4 39.Kg1 Kg7 40.Kf2 Kf6 41.g4 g5 42.Ke3 Ke5 0–1. rom49szachy – slawek103, kurnik, 2012.

4.e3 e5 5.d4 Bb4–/+ 6.Nd2 Qe7 7.de5 fe5 8.a3? (8.Qh5 Kd8 9.Qe5 Qe5 10.Be5 Nf6=) 8...Bc5 (8...Bd2 9.Qd2 Nf6 10.f3–/+) 9.Ngf3 (better is 9.Qh5 Kd8 10.Qe5 Qe5 11.Be5+=) 9...d6–/+ 10.Bd3 Qf7 (10...Nf6!? 11.Bf5–/+) 11.Be4 Be4 12.Ne4 Nd7 13.Qa4 Ngf6 14.Nc5 bc5 (worse is 14...dc5 15.Ne5 Qe6 16.0–0–0+=) 15.0–0 0–0 16.Ng5 Qg6 17.Ne6 Rfc8 18.f4 Ng4?? (better is 18...Qe4–/+) 19.f5?? (better is 19.Qd7 Ne3 20.Rf2+/–) 19...Qf7 20.e4 Nb6 21.Qd1? Ne3–+ 22.Qd3 Nf1 23.Rf1 Nd7?? 24.Ng5= Qh5 25.Qd5 Kf8 26.Ne6 Ke7 27.Ng7 Qf7 28.Qe6? Qe6–/+ 29.Ne6 Nf6 30.Bc1 Ne4 31.Re1 Nd2?? 32.Bd2+/– Kd7 33.Ng5 h5 34.Ne4 Rf8 35.Rf1 Rab8 36.Bc1 Rb3 37.h3 a5 38.Kh2 Rd3 39.g4 Rd4 40.Re1 hg4 41.hg4 Rh8 42.Kg3 Rd3 43.Re3 Rd1 44.Bd2 Rdh1 45.Kf3 c6? 46.Ng3 R8h3 47.Be1 Ke7? 48.Bf2?? R1h2 49.g5 Kf7 50.Rd3?? Ke7?? 51.f6 Ke6 (51...Ke6 52.f7! e4 53.Ke3 Kf7 54.Rd6 Rg2 55.Rc6 Rgg3 56.Bg3 Rg3 57.Kf4 Ra3 58.Ke4 a4+/–). typ48 – pepekrol, kurnik, 2012.

4.e3 g6 5.Nf3 Bg7 6.c5 c6 7.Bc4 b5 8.Bb3 a6 9.Ng5 Nh6 10.Qf3 Kf8 11.Ne4 Nf5 12.0–0 d6 13.d3 d5 14.Ned2 Nd7 15.e4 de4 16.de4 Nh4 17.Qf4 g5 18.Qe3 a5 19.ba5 Ra5 20.f4 gf4 21.Qf4 Ng6 22.Qf3 Nc5 23.e5 Qd2 24.Nd2 Nd7 25.ef6 Nf6 26.Ne4 c5 27.Qf5 Nh4 28.Qc5 Be4 29.Qc8 1–0. arti000 – mehmet22, kurnik, 2012.

4.Nf3 e5 5.a3 Ne7 (5...a5 6.b5=) 6.e3 d5 7.cd5 Nd5 8.Nc3 Nc3 (8...c5 9.bc5 Bc5 10.d4 ed4 11.Nd4 Nc3 12.Bc3 Bd4 13.Bd4+=) 9.Bc3 Nc6 10.Bc4 Bd6 11.0–0 Qe7 (11...e4 12.Nh4 Qd7 13.Qh5 Kd8 14.Rad1+/–) 12.d4 e4 13.Nd2 0–0–0 (13...a5 14.b5 Na7 15.Qh5 Kd8 16.a4+/–) 14.Qc2 (14.b5 Nb8+–) 14...f5 15.Rfb1 (15.b5 Nb8+–) 15...g5 (15...Qh4 16.g3 Qf6 17.a4+/–) 16.a4 (better is 16.b5!? Nb8 17.Qa4+–) 16...Nb4+= 17.Bb4 Bb4 18.Nb3 (better is 18.a5!?+=) 18...a5+= 19.Rc1 Kb8 20.Bb5 f4 21.Nd2 Bd6 22.Bc6 Can e4 get defended? 22...Bc6 23.Qc6 g4 24.Rab1 Ka7 25.Ne4+/– fe3 26.Nd6 ef2= 27.Kf2 Rhf8 28.Kg1 Rd6 29.Qc7 Qc7 30.Rc7 Ka6 31.Rh7 Rd4 32.Rh6 Rb8 33.Ra1 Rc8 34.Rg6 Rcc4 35.Rb1 Rb4 36.Rc1 Ra4 37.Rg7 Rac4 38.Rf1 Rf4 39.Ra1 a4 40.h4 gh3! 41.gh3 b5 42.Kg2 Ka5 43.Kg3 Rfd4 44.h4? Rh4 45.Ra7 Kb6 46.Ra8 Rhg4 47.Kf3 Rgd4 48.Rb8 Ka5 49.Rb1 Rc3 50.Ke2 Rd5 51.Ra8 Kb6 52.Rb2? a3 53.Ra2 b4 54.Rb8 Kc5 55.Rc8 Kd4 56.Kd2 Rdc5 57.Rd8 Kc4 58.Ra1 Kb3 59.Rb8 Rc2 Black plans a2 60.Kd1 R5c3 61.Rb1 Rb2 62.Rc1 Rc1 63.Kc1 a2 64.Ra8?? Rb1 65.Kd2 a1Q 66.Rc8 Qc3! 67.Ke2 Qc8 68.Ke3 Ka3 69.Ke2 Rc1 70.Ke3 (70.Kf3 Qf5 71.Ke2 Qe4 72.Kf2 Qf4 73.Ke2 Rc2 74.Kd3 Rd2#) 0–1. orangutanb4 (2030) – larsenko (1895), kurnik, 2011.

3.c4 Nf6

4.a4 g6 5.b5 Bg7 6.e3 0–0 7.Nf3 d6 8.Be2 Nbd7 9.0–0 Re8 10.d4 e5 11.de5 (11.Nbd2 a6=) 11...Ne5 (11...de5 12.a5=) 12.Ne5 (12.a5 c5+=) 12...de5 13.Nc3 Qe7 14.Qc2 Qe6 15.Rad1 (15.e4 c6+=) 15...Ng4 (15...c6 16.Qd3=) 16.h3 (16.Nd5 Rac8+–) 16...Nh6 (16...Nf6 17.Rd2+=) 17.Nd5 (better 17.e4+=) 17...Rab8?? (better 17...Rac8+=) 18.Nc7+– Qe7 19.Ne8 Re8 20.Rd2 (20.a5 Qg5 21.e4 f5+–) 20...Qg5 Threatening mate... how? 21.e4?? (21.g3 Nf5 22.Kh2 Bf8+–) 21...f5? (better 21...Be4!? 22.Qe4 Qd2=) 22.Bf3 (better 22.f3 fe4 23.Rd7 Qe3 24.Kh2+–) 22...f4?? (better 22...fe4 23.Bd1 e3 24.fe3 Qe3 25.Rff2 Bf8+–) 23.c5 Nf7 (23...bc5 24.Qc5 Bc8 25.Kh2+–) 24.c6 (24.Rfd1!? bc5 25.Qc5 Bc8+–) 24...Bc8 25.Rd5 (better 25.Kh1!? Bf8+–) 25...Bh3 26.Rfd1?? (better 26.Rd3+–) 26...Bg4?? (better 26...Bg2 27.Bg2 f3=) 27.Qe2 (better 27.Bg4!? Qg4 28.Qd3 Bf8+–) 27...Be6 28.R5d2 h5 (28...Rc8 29.Qd3+–) 29.c7 (29.Qd3 h4+–) 29...h4 (better 29...Bf8+–) 30.Rc2 h3 (30...Bf6 31.a5+–) 31.Rc6 Bc8 32.Rdc1 (32.Qc4 Bg4 33.c8Q Rc8 34.Rc8 Bc8 35.Qc8 Bf8+–) 32...hg2 33.Bg2 Nh6 34.Qf3 Bg4 (34...Kh7 35.Kf1 Bg4+–) 35.Qb3 (35.c8Q Rc8 36.Rc8 Kh7+–) 35...Kh7 36.f3 (36.c8Q Rc8 37.Rc8 f3+–) 36...Bh3 (36...Bc8 37.Qc3+–) 37.Qc2 Rc8 38.Kf1 (better 38.Rd1 Nf7 39.Kh1 Bg2 40.Qg2 Qh5 41.Kg1+–) 38...Bd7 39.Qf2 (better 39.Rd6 Qe7 40.Qd2+–) 39...Be6?? (better 39...Bc6 40.Rc6 Qe7+–) 40.Re6+– Nf7 (40...Qh5 41.Qd2 Ng4 42.fg4 Qg4 43.Re7+–) 41.Rec6 (41.Qd2 Rf8 42.Ba3 Ra8+–) 41...Nh6 (41...Nd8 42.cd8N Rd8 43.Rc7+–) 42.Qd2 (42.Bh3 Rh8+–) 42...Ng4 (42...Nf5 43.ef5 Qf5+–) 43.Qd7 (better 43.Bh3 Ne3 44.Ke2 Ra8+–) 43...Nh2 (43...Ne3 44.Ke2 Qg2 45.Kd3 Qf3 46.Qc8 Nd1 47.Kd2 Qe3 48.Kd1 Qd3 49.Ke1 Qe3 50.Kf1 Qf3 51.Kg1 Qe3 52.Kg2 Qe2 53.Kh1 Qf3 54.Kh2 Qg3 55.Kh1 Qf3 56.Kg1 Qg3 57.Kf1 Qf3 58.Ke1 Qe3 59.Kd1 Qd3 60.Ke1 Qe3=) 44.Kf2 (better 44.Kg1 Nf3 45.Kh1 Qh5 46.Bh3+–) 44...Ng4?? (44...Qg3 45.Ke2 Qg2 46.Kd3 Qf3 47.Kc4 Qg4+–) 45.Kg1 (45.fg4 Qh4 46.Kf1 f3 47.Rg6 fg2 48.Kg2 Qg3 49.Kg3 Kg6 50.Qf5 Kh6 51.Qh5) 45...Rf8 (45...Ne3 46.Qh3 Bh6 47.R6c2+–) 46.Qg4 Qf6 47.Qh3 Kg8 (47...Qh4 48.Qh4 Kg8 49.Bf1 Bf6 50.Qh6 Kf7 51.Qh7 Bg7 52.Bc4 Ke8 53.c8Q Ke7 54.Ba3) 48.c8Q (48.Rf6 Bh6 49.Rg6 Bg7 50.Qh6 Kf7 51.Qg7 Ke8 52.c8Q) 48...Qc6 49.Rc6 Bf6 (49...Rc8 50.Rc8 Kf7 51.Qd7 Kf6 52.Rc6 Kg5 53.Qg4 Kh6 54.Qg6) 50.Qhe6 Kg7 51.Qcd7 Kh6 (51...Kh8 52.Qh3 Bh4 53.Qh4 Kg8 54.Rg6) 52.Qh3 Kg5 53.Qdg4 1–0. BeepBeepImAJeep (2600) – RadovanHurtuk (2300), lichess.org, 2017.

4.Qc2 e6 5.d3 Bb4!? 6.Nd2 0–0–/+.

4.Nc3 e6 5.Qc2 Bb4–/+ 6.e4 (6.Nf3 a6–/+) 6...Be7 (6...Bc3!? 7.Qc3 Be4 8.Nf3–+) 7.f4 d5 (7...Bc5 8.a3–/+) 8.e5 White gains space 8...Ne4 9.Ne4 de4 10.Ne2 Qd3 Black threatens to win material: Qd3xc2 (10...Na6 11.Qa4 c6 12.Nd4–+) 11.0–0–0 White is not afraid to castle (better 11.Qd3!? ed3 12.Nc1–/+) 11...Qc2–+ 12.Kc2 0–0 13.Ng3 Rd8 14.Be2 (14.f5 Bc6 15.Re1 ef5 16.Nf5 Bb4–/+) 14...Nd7 15.Bg4 (15.f5 Nc5–/+) 15...Nc5–+ 16.Rhe1 (16.f5 Bc6 17.fe6 Ba4 18.Kb1 Bd1 19.Rd1 g6–+) 16...Nd3 (16...Bc6!? 17.Rc1–+) 17.Ne4 Ne1 18.Re1 Be4 19.Re4 Rd7 20.f5 ef5 21.Bf5 Rdd8 22.e6 Bb4 The backward pawn on d2 becomes a target 23.ef7 Kf7 24.Be6 Kf8 25.Bd5 Rd5 (25...c6 26.Rf4 Ke7 27.Re4 Kd7 28.Be6 Kd6 29.a3=+) 26.cd5= Black has a new backward pawn: c7 26...Bd6 Black threatens to win material: Bd6xh2. The bishop blocks d5 27.Rg4 g6 28.h3 Re8 29.Kd3 Re5?? Black lets it slip away (better 29...a5=+ and Black could well hope to play on) 30.Be5+– Be5 31.Rh4 Kg7 32.Ra4 a5 33.Rc4 Bd6 34.a4 Kf6 35.Ke4 h6 36.g4 g5 (36...Kg5 37.d4+–) 37.d4 Bf4 38.Rc3 Ke7 39.Kf5 Kd6 40.Kg6?? White threatens to win material: Kg6xh6. releasing the pressure on the opponen (better 40.Rc6 with excellent chances for White 40...Kd5 41.Rh6+–) 40...Kd5+= 41.Kh6 Kd4 Black has a new passed pawn: c7. 42.Rc6 Kd5 Black threatens to win material: Kd5xc6 43.Rf6 c5? (better 43...Be3+=) 44.Kg6?? lets it slip away (better 44.h4 the advantage is on the side of White 44...c4 45.hg5+–) 44...c4–/+ 45.Rf8 Kc5?? Black has let it slip away (45...c3 46.Rc8 Kd4 47.Kf5–/+) 46.Rc8?? gives the opponent counterplay (better 46.h4 c3 47.Rc8 Kb4 48.h5+– (worse 48.hg5 Be3 49.Kh5 Bc5+=)) 46...Kb4–/+ 47.Kh5? (better 47.Kf5!? Be3 48.Rc6–/+) 47...c3–+ (47...Ka4?! is the weaker alternative 48.h4 Kb3 49.hg5=) 48.h4 gh4 49.g5?? the final mistake, not that it matters anymore (49.Kh4 Be3 50.g5–+) 49...h3 50.g6 (50.Rf8 what else? 50...Be3 51.g6–+) 50...h2 51.Kg4 h1Q 52.g7 Qh7 (better 52...Qg1 makes it even easier for Black 53.Kf4 Qg7 54.Rc3 Qd4 55.Kf3 Qc3 56.Ke4 Ka4 57.Kf5–+) 53.Kf4 (53.g8Q desperation 53...Qg8 54.Rg8–+) 53...Qg7 54.Rc4 Kc4 55.Ke3 (55.Ke4 does not save the day 55...c2 56.Ke3 c1Q 57.Kf3 Qf1 58.Ke4 Qd4) 55...Qd7 (55...Qd4 56.Ke2 Qd3 57.Kf2 c2 58.Kg2 c1Q 59.Kh2 Qcd2 60.Kg1 Qb1) 56.Ke2 (56.Ke4 doesn't change anything anymore 56...c2 57.Kf3 c1Q 58.Kf2 Qh3 59.Ke2 Qhe3) 56...Qd3 57.Kf2 Kb4 (57...c2 58.Kg2 c1Q 59.Kh2 Qcd2 60.Kg1 Qb1) 58.Kg2 Ka4 59.Kh2 (59.Kf2 is not much help 59...c2 60.Kg2 c1Q 61.Kh2 Qcd2 62.Kg1 Qb1) 59...Kb3 (59...c2 60.Kg2 c1Q 61.Kh2 Qcd2 62.Kg1 Qb1) 60.Kg2 c2 (60...c2 61.Kh2 c1Q 62.Kg2 Qcd2 63.Kg1 Qb1; 60...Qg6 61.Kf3 c2 62.Ke2 Qg2 63.Kd3 c1Q 64.Kd4 Qc3) 0–1. AvImd (1785) – ragnord (1905), lichess.org, 2020.

4.d3 e6 5.a3 d5 6.Nd2 c5 7.b5 Nbd7 8.Ngf3 d4 9.g3 Bd6 10.Bg2 e5 11.Nh4 (11.0–0 0–0=+) 11...Bg2 12.Ng2 Qe7 13.0–0 e4 (13...a6 14.ba6 0–0 15.Qb3=+) 14.de4 (14.e3!? ed3 15.ed4+=) 14...Ne4= 15.Ne4 Qe4 16.Qd3 (16.e3 d3 17.Rc1 Be5=) 16...Qd3=+ 17.ed3 Ne5 18.Rfe1 (18.Ne1 a6 19.ba6 Kd7=) 18...0–0 19.Red1 Nf3 20.Kh1 Rfe8 21.Ne1 Ng5 (21...Ne5 22.Kg2=+) 22.Bc1 Ne6 23.a4 (23.Nf3 a6 24.ba6 Nc7=+) 23...a5 24.Nf3 Nf8 25.Bd2 Re2 26.Kg1 Rae8 27.Re1 f6 28.Re2 Re2 29.Re1 Re1 30.Be1 Kf7 31.Kg2 h5 32.h4 Ne6 33.Bd2 Kg6 34.Kh3 Kf5 35.Bc1 g5 36.Ng1 (36.Kg2 Kg6=+) 36...g4 (36...Nf8 37.hg5 fg5 38.f3=+) 37.Kg2 Kg6 38.Ne2 f5 39.Bd2 Kf6 ½–½. petrobbo (1975) – UConnKid (2165), ChessWorld.net, 2011.

4.d4 d5 5.Nf3 e6 6.e3 (6.Qa4!? Nbd7 7.Nc3+=) 6...Bb4–/+ 7.Nbd2 0–0 8.Be2 Nbd7 9.0–0 c5 10.Qb3 a5 11.a3 Bd2 12.Nd2 dc4 13.Bc4 (13.Qc4? Ba6 14.Qa6 Ra6 15.Ba6 cd4 16.ed4 Nd5–+; 13.Nc4?! Bd5 14.dc5 bc5=) 13...cd4 14.Bd4 Qc7 15.h3 (15.Rab1 Rab8=) 15...Qc6 (15...e5!? 16.Bb2 Nc5–/+) 16.Nf3+= Ne4 17.Bb5 Qc7 18.Bd7 Qd7 19.Rfd1 Qc6 (19...Bd5 A) worse is 20.Qb6 Rfb8 21.Ne5 Qe7–+ (21...Rb6?! 22.Nd7 Rd6 23.Nb6=); B) 20.Qd3+=) 20.Rac1 (worse is 20.Bb6 Ng5 21.e4 Qe4–/+; 20.Qb6?! Qb6 21.Bb6 Rfc8=) 20...Qd5 21.Qd5 Bd5 (worse is 21...ed5 22.Bb6 Ra6 23.Bc7+/–) 22.Bb6 a4 23.Ne5 Rfc8 24.Nd3 Nc3 25.Re1 Rc6 26.Bd4 Rac8 27.Bc3 Rc3 28.Rc3 Rc3 29.Rc1 Rc1 30.Nc1 Kf8 31.Nd3 Ke7 32.Nc5 Bb3 33.Kf1 Kd6 34.Ne4 Kc6 (34...Kd5 35.Nd2+=) 35.Ke1 (better is 35.f3=) 35...Kb5?? (35...Bd5!? 36.Nc3 Bg2–/+) 36.Kd2 (better is 36.Nd6!? Kc5 37.Nf7+/–) 36...f5 37.Nc3 Kc4 38.Ne2 e5 39.g4 g6 40.gf5 gf5 41.Ng3 f4 42.ef4 ef4 43.Ne2 h6 44.Nf4 Kd4 45.Ne2 Ke4 46.Kc3 Bd1 47.Nd4 Kf4 48.Kd2 Bh5 49.Kc3 Be8 50.Kb4 Bd7 51.h4 Kg4 52.Kc5 Kh4 53.Kd6 Be8 54.f4 h5 55.f5 Kg4 56.Ke7 Bc6?? (better is 56...h4 57.Ke8 h3=) 57.f6+– (57.Nc6?! Kf5 58.Nd4 Ke5 59.Nf3 Kd5=) 57...Bd5 58.Ne6 1–0. justforfun (2510) – mbarker (2410), net–chess.com, 2015.

4.f3 g6 5.e4 Bg7 6.d4 0–0 7.Bd3 e6 (7...c5 8.bc5 bc5 9.e5=) 8.a3 (8.Ne2 d5 9.cd5 ed5+=) 8...d5= 9.cd5 ed5 10.e5 Nh5 (10...Nfd7 11.f4=) 11.Ne2 Bh6 (11...Qh4!? 12.g3 Qh3+=) 12.0–0 Nf4 13.Nf4 (13.Bc1 Ne2 14.Qe2 Bc1 15.Rc1 f6+/–) 13...Bf4+= 14.Nd2 (14.Qe2 a5+=) 14...Qh4= 15.g3 Bg3 16.hg3 Qg3 17.Kh1 Qh3 18.Kg1 Qg3 19.Kh1 Qh3 20.Kg1 Qg3 ½–½. Fournier,Frederic – Gengiskhan, Partie evaluee, 1m + 0s, 2008.

4.Nf3 (--> 3.Nf3 Nf6 4.c4).

4.Nc3 g6

5.a4 Bg7 6.b5 0–0 7.Nf3 Bf3 8.ef3 c6 9.g3 cb5 10.cb5 d5 11.Bg2 a6 12.0–0 ab5 13.ab5 Ra1 14.Ba1 Nfd7 (14...Qd6 15.Qe2+=) 15.d4 (better is 15.Nd5!? Ba1 16.Qa1+/–) 15...Nf6 16.f4 Ne4 (better is 16...e6!?+=) 17.Ne4+/– de4 18.Be4 f5 (18...Qd6!?+/–) 19.Bg2 e6 20.Qb3 Re8 21.Rd1 White prepares the advance d5 21...Nd7 22.d5 Ba1?? (22...Nc5 23.Qb1+/–) 23.Ra1 Nc5+/– 24.Qa2 e5 25.fe5 Re5 26.d6 Kg7 27.Qa7 Kh6 28.Qc7 Qc7?? 29.dc7 Re8 30.Ra8 Re1 31.Bf1 Ne4 32.c8Q Nd2 33.Qf8 Kh5 34.g4! Kg4 35.Qb4 Re4 36.Qd2 Kh5 37.Be2 Kh4 38.Ra3 g5 39.Rg3 g4 40.Qh6# 1–0. kannisogoet – wiol11a, kurnik, 2012.

5.d4 Bg7 6.Qd3 0–0 7.e4 d6 8.f4 Nbd7 9.Nf3 c5 10.a3 (10.bc5 bc5 11.d5 Nh5= (11...Rb8 12.Rb1 e6 13.de6 fe6 14.Qd6= 0.06) 12.g3 Rb8 13.Rb1 Ba6 14.Nd2= 0.00) 10...Nh5 (10...cd4 A) worse is 11.Qd4 Ne4 12.Qe3 Re8 (12...Ndf6–/+ 13.Ne4 Ng4 14.Qd2–/+ –1.09) 13.Ne4 Bb2 14.Rb1–+ –1.41; B) 11.Nd4 a6 12.Rd1+= Re8 13.Be2 e5 14.fe5+= –0.66) 11.g3 cb4 (11...cd4 12.Nd4 e5 13.Ndb5 ef4 14.Nd6= 0.00) 12.ab4 e5 (12...a5 13.ba5 ba5 14.Bg2+=) 13.fe5 (13.de5!? de5 14.Rd1+/–) 13...de5+= 14.d5 Nb8 (14...Re8 15.Bh3+=) 15.Bh3 Na6 16.Ba3 Rc8?? (better is 16...f5+/–) 17.Bc8+– Bc8 18.0–0 Re8 19.c5 bc5 20.bc5 Nb8 21.Nb5 a5 22.Nd6 Ba6 23.Qe3 Bf1 24.Ne8 Qe8 25.Kf1 Qb5 26.Qe2 Qe2 27.Ke2 f6 28.Bc1 f5 29.Ra5 fe4 30.Nd2 Nd7 31.Ne4 Bf8 32.c6 Nb6 33.d6 Nc4 34.Ra8 Kg7 35.d7 (35.d7 Nd2 36.d8Q Bc5 37.Qc7 Kh6 38.Bd2 Be3 39.Be3 Nf4 40.Bf4 g5 41.Qe5 Kg6 42.Qg5 Kf7 43.Qf6#) 1–0. thotares (1735) – Rajko, internet, 2007.

5.e3 Bg7 6.Nf3 0–0 7.d4 e6 8.Be2 d5 9.0–0 dc4 10.Bc4 a6 11.a4 Nc6 12.b5 ab5 13.ab5 Ra1 14.Ba1 Na5 15.Be2 Nd5 16.Qc2 Nb4 17.Qb2 Qe7 18.Rd1 Nd5 19.Rd3 Nc3 20.Rc3 Bd5 21.Nd2 Rc8 22.Ra3 Qg5 23.e4 Bb7 24.Nf3 Qf4 25.e5 Bf3 26.Bf3?? (better is 26.Rf3 Qe4 27.Re3+=) 26...Nc4–/+ 27.Qb3?? Na3 28.Qa3–/+ Qd2 29.h3 Bh6 30.Qa6?? Qe1 31.Kh2 Re8 32.Qa2–+ Qd2 33.Qb2 Qb2 34.Bb2 Rd8 35.g4 Bf4 36.Kg2 Bd2 37.h4 Rc8 38.Bc6 Kg7 39.Kg3 h6 40.f4 Rf8 41.h5 gh5 42.gh5 f6 43.Kf3 fe5–/+ 44.de5 Rf4 45.Ke2 Bb4 46.Ke3 Rh4 47.Bf3 Rh3 48.Kf4 Bd2 49.Kg4 Rh2 50.Kg3 Bf4! 51.Kg4?? Rb2 52.Kf4 Rb5 53.Be4 Rb4 54.Kf3 Rc4 55.Kf4 b5 56.Ke3 b4 57.Kd3 Rc5 58.Kd2 b3 59.Bb1 b2 60.Kd1 Rc1 61.Kd2 Rb1 62.Kd3 Rc1 63.Kd4 b1Q 64.Ke3 Re1 65.Kf3 Qd1 66.Kg3 Rg1 67.Kh3 Qf3 (67...Qf3 68.Kh4 Rg4#; 67...Qh5#) 0–1. captainevans – marcaocabecao, kurnik, 2012.

5.Nf3 Bg7

6.g3 0–0 7.Bg2 Nc6 8.b5 Nb8 (8...Ne5! 9.d3 Nf3 10.ef3 a6+=) 9.a4 c6 10.0–0 cb5 11.cb5 a6 12.e3 ab5 13.ab5 Ra1 14.Ba1 d6 15.d4 Qc8 16.Bb2 Nbd7 17.Qb3 e6 18.Rc1 Qa8 19.Ra1 Qb8 20.Qb4 Nd5 21.Nd5 Bd5 22.Ba3 Qb7 23.Qd6 Bf3 24.Bf3 Qf3 25.Qd7 e5?? (better is 25...Ra8 26.Qc6 Qd5+/–) 26.Bf8+– Bf8 27.de5 h5 28.Qc6 Qf5 29.Qb6 Qe5 30.Qc6 Qa1+= 31.Kg2 Kg7 32.b6 Qa3 33.b7 Bd6 34.Qc8 Qb4 35.Qc6 Qa3 36.Qc8 Qb4 37.Qc6 Qa3 ½–½. kannisogoet – lalamido72, kurnik, 2012.

6.g3 0–0 7.Bg2 d6 8.0–0 Nbd7 9.e3 Ne4 10.d4 Nc3 11.Bc3 Rb8 12.Bb2 a6 13.a4 c5 14.b5 a5 15.Qe2 cd4 16.Nd4 Nc5 17.Rab1 Bg2 18.Kg2 Bd4 (worse is 18...Na4 19.Nc6 Qc7 20.Bg7 Kg7 21.Nb8 Rb8 22.Ra1+=) 19.Bd4 (19.ed4 Nd7+=) 19...e5 (19...Na4 20.Ra1 Nc5 21.Bc5 dc5 22.e4+=) 20.Bb2 (20.Bc5 dc5 21.Rbd1 Qe7=) 20...Qe7 (20...Na4 21.Ra1 Nb2 22.Qb2–/+) 21.Rfd1 Na4 22.Qc2 Nb2 23.Rb2 Rfd8 24.Qe2 Rbc8 25.Rbd2 Qe6 26.Qd3? Qc4 27.Qc4+= Rc4 28.Rd6 Rd6 29.Rd6 Rb4 30.Rb6 a4 31.Ra6 Rb5 32.Ra4 Kg7 33.Ra6 f6 34.h4 h5 35.Kf3 Rb2 36.Rc6 f5 37.Kg2 e4 38.Ra6 Kh6 39.Rc6 Rd2 40.Rb6 Rd1 41.Rc6 Ra1 42.Rb6 Ra5 43.Rc6 Ra7 44.Rb6 Kg7 45.Rc6 Rf7 46.Rb6 Rf6 47.Rb5 Rd6 48.Rb7 Kf6 49.Rc7 Re6 50.Rb7 Re7 51.Rb6 Kf7 52.Rc6 Kg7 53.Rb6 Rf7 54.Rc6 Rf6 55.Rc7 Kh6 56.Rb7 g5 57.hg5 Kg5 58.Rb5 h4 59.gh4 Kh4 60.Kf1 Kg4+= 61.Rc5 Kf3 62.Rd5 f4 63.ef4 Kf4 64.Rd4 Kf3 65.Rb4 Rd6 66.Rb3 Kf4 67.Rb4 Rd2 68.Ke1 Rc2 69.Rb3 Ra2 70.Rc3 Ra1 71.Ke2 Ra2 72.Ke1 Ra4 73.Rb3 Rd4 74.Rc3 Rd3 75.Rc2 Kf3 76.Rb2 Ra3 77.Rc2?? Ra1–+ 78.Kd2 Kf2 79.Kc3 Kf3 80.Kd2 e3 81.Kc3 Ra3 82.Kb2 Ra6 83.Rc3 Kf2 84.Kc2 Rd6 85.Rc4 Rd2 86.Kc1 Rd7 87.Rf4 Kg3 88.Re4 Kf3 89.Re5 e2 90.Rf5 Ke4 91.Rf8 Rd1 92.Kc2–+ e1Q 93.Re8 Kf3 94.Rf8 Kg2 95.Rg8 Qg3 96.Rg3= Kg3 97.Kd1 ½–½. kannisogoet – burza56, kurnik, 2012.

6.g3 0–0 7.Bg2 Ne4 8.Qc2 Nc3 9.dc3 (9.Bc3 e5=) 9...Bf3 10.Bf3 Nc6 11.b5 Ne5 12.Ba8 Qa8 13.0–0 Nf3?? (better is 13...Nc4 14.Bc1 c6=) 14.ef3+– Qf3 15.Rae1 Qg4 (15...e6 16.Re3 Qg4 17.Qd3+–) 16.Re7 f5 17.Rfe1 f4 18.Qe2 Qg5 19.Re8 fg3 20.fg3 Qc5 21.Kh1 c6 22.Rf8 Bf8 23.Bc1 Bd6 24.Bh6 Kf7 25.Rf1 Kg8 26.Qe8 Bf8 27.Rf8 Qf8 28.Qf8# 1–0. kannisogoet – wiol11a, kurnik, 2012.

6.g3 0–0 7.Bg2 e6 8.0–0 d6 9.e3 Nbd7 10.d4 Rb8 11.a4 c5 12.b5 cd4 13.Nd4 Bg2 14.Kg2 Nc5?? (better is 14...Ne5–/+) 15.Nc6+/– Qc7 16.Nb8 Qb8 17.Rb1 Qb7 18.Kg1 Nce4 (better is 18...Nfd7!? 19.f4 Qc7+/–) 19.Ne4+– Ne4 20.Bg7 Kg7 21.Qc2 Ng5+= 22.Rfd1 Nf3 23.Kf1 Nh2 24.Ke1 Qh1 25.Kd2 Nf3 26.Ke2 Qh5= 27.Kf1 f5 28.Rd6+/– e5 29.Kg2 e4? 30.Kf1 Nh2= 31.Ke1 Nf3 32.Kf1 Qh1 33.Ke2+/– Qg2? 34.Rdd1 Ne5+/– 35.Kd2?? Qf2–+ 36.Kc1 Qe3 37.Kb2 Qc5 38.Kb3 Nd3 39.Rd3 ed3 40.Qc3 Kg8 41.Qd3 a5 42.Qd5 Qd5+= 43.cd5 Rd8 44.Kc4 Kf7 45.Re1 Rd6 46.Re3 Kf6 47.Re8 Kg5 48.Re7 h5= 49.Re6?? Re6–+ 50.de6 Kf6 51.Kd5 g5 52.Kd6+– f4 53.gf4 gf4 54.Kd7 f3 55.e7 f2 56.e8Q f1Q 57.Qf8 Kg5 58.Qf1 h4 59.Qg2 Kh5 60.Kc6 Kh6 61.Kb6 Kh5+– If Black now only could play Ka6... 62.Ka5 h3 63.Qh2 Kg4 64.b6 (64.b6 Kf5 65.Qh3 Kg5 66.Qf3 Kg6 67.b7 Kg5 68.b8Q Kg6 69.Qbg3 Kh6 70.Qh1#) 1–0. kannisogoet – wiol11a, kurnik, 2012.

6.g3 Nc6+= 7.b5 Nb8 (7...Ne5! 8.d3 Nf3 9.ef3 a6+=) 8.Bg2= a6 9.a4 ab5 10.a5?? (better is 10.ab5 Ra1 11.Qa1+=) 10...Ra5 (better is 10...b4!? 11.Na4 ba5–+) 11.cb5 Ra1 12.Ba1 d6 13.0–0 Qd7 14.e3 0–0 15.d4 Nd5 16.Nd5 Bd5 17.Qe2 Qe6 18.Rc1 h5 19.Qc2 c5 20.dc5 dc5 21.Ng5 Qd7 22.Rd1+/– e6 23.Bg7 Kg7 24.Qc3 f6? 25.Nf3?? Qb5–+ 26.Nd4?? cd4 27.Qd4 Bg2 28.Kg2 Qc6 29.Kg1 Rf7 30.Rb1 Nd7 31.Rb6 Qb6 32.Qc3 Qc5 33.Qd2 e5 34.h4 Nb6 35.Kg2 Qd5 36.Qd5 Nd5 37.Kf3 Rc7 38.e4 Rc3 39.Kg2 Nb4 40.Kh3 Nd3 41.f4 Nf2 42.Kg2 Ne4 43.fe5 Rg3 44.Kh2 fe5 45.Kh1 Kf6 46.Kh2 Kf5 47.Kh1 Kf4 48.Kh2 Kf3 49.Kh1 Nf6 50.Kh2 e4 51.Kh1 e3 52.Kh2 e2 53.Kh1 Rg2 (53...e1Q 54.Kh2 Ng4#) ½–½. kannisogoet – daut123, kurnik, 2012.

6.g3 d6 7.Bg2= 0–0 8.0–0 e6 9.e3 Nbd7 10.d4 a6 11.a4 c5 12.b5 a5 13.dc5 Nc5 14.Qc2 Nfe4 15.Nd4 d5 (15...f5!?+=) 16.Rfd1 Qc7 17.cd5 Nc3 18.Qc3 ed5 19.Rac1 Rac8 20.Qc2 Qe7 21.Ba3 Qf6 22.Bc5 Rc5 23.Qb2 Rfc8 24.Rc5?? (24.Qd2 Rc4=) 24...Rc5?? (better is 24...bc5 25.Qb1 cd4 26.Rd4 Qe7–+) 25.Rc1 Qd6 26.Rc5 bc5 27.Nc2?? (better is 27.Qa3 Qb6 28.Ne2=) 27…Bb2–+ 0–1. kannisogoet – delnik, kurnik, 2012.

6.g3 e6 7.Bg2 d6 8.0–0 Nc6 9.b5 Na5 10.d3 Qd7 11.a4 0–0–0 12.e3 h5 13.Qc2 Ng4 14.h3 Nf6 15.d4 (better is 15.Ne4 Qe7 16.Bc3+=) 15...Ne4?? (better is 15...Nc4 16.a5 Na5+=) 16.Ne4+– f5 17.Neg5 Bf6 18.h4 e5 19.de5 de5 20.Rfd1 Qe7 Black prepares the advance e4 21.Rd8 Rd8 22.Ba3 Qe8 23.c5 e4 24.Nd4! Bd4 25.ed4 e3 26.c6 Ba8 27.Re1 Rd4 28.Re3 Qd8 29.Kh2 Rd2 30.Qb1 Rf2 31.Nf7 Qd5?? 32.Re8 Qd8 33.Rd8# 1–0. kannisogoet – remek88, kurnik, 2012.

4.d4 e6

5.a3 c5 6.dc5 bc5 7.Qb3 Qc7 8.Nd2 Be7 9.b5 0–0 10.a4 d5 11.Ngf3 Nbd7 12.a5 dc4 13.Nc4 Bd5 14.Qc2 Rab8 15.Qa4 Qb7 16.Na3 c4! 17.a6 (17.Nc4 Qb5 Deflection) 17...Qc8 18.e3 Nc5 19.Qc2 Nb3 20.Rd1 Bb4 Black prepares c3 21.Nd2 (21.Ke2 c3 22.Rd5 cb2 23.Qb3 Nd5 24.Qb2 Nc3 25.Kd3 Rd8 26.Nd4–+) 21...Nd2 (21...Bd2?! 22.Rd2 Nd2 23.Qd2–+) 22.Rd2 c3 23.Kd1?? cb2 24.Qb2 Bd2 25.Qd2 Ne4 26.Qd4 Nf2 27.Ke2 Nh1 (27...Nh1 28.e4 Qc1 29.ed5 Qa3–+) 0–1. blackiwhite (1690) – lembak (2160), kurnik, 2011.

5.a3 d5 6.c5 a5 7.e3 ab4 8.ab4 Ra1 9.Ba1 bc5 10.bc5 Ba6?? (better is 10...Be7=) 11.Ba6+– Na6 12.Qa4 Nd7 13.Qa6 Bc5 (13...Be7+–) 14.dc5 Nc5 15.Qc6 Nd7 16.Ne2 (better is 16.Bg7!? Rg8 17.Be5 Qb8+–) 16...0–0 17.0–0 Nb6 18.Nd2 Nc4 (18...Qd6 19.Rc1 Qc6 20.Rc6+–) 19.Nc4 dc4 20.Qc4 Qd6 21.Qd4 Qh2 (21...Qd4 22.Bd4 f6+–) 22.Kh2 g6 23.Qg7# 1–0. tyop (1770) – osel33, kurnik, 2012.

5.a3 d5 6.c5 Nbd7 7.Qc2 c6 (7...bc5 A) 8.dc5 c6 (8...Ba6 9.Nf3 Be7 10.g3 0–0= 0.01) 9.Nf3 a5 10.g3 ab4+= –0.62; B) 8.bc5 Rb8 (8...Bc6 9.Nf3 g6 10.e3 Bg7= –0.06) 9.Nf3 c6 10.Nc3 Qa5= –0.06; 7...Nb8 A) 8.Nd2 a5 (8...c6 9.Ngf3 g6 10.e3 Nbd7+= 0.49) 9.Ngf3 ab4 10.ab4 Nc6= 0.13; B) 8.Nf3 a5 (8...Be7 9.Nbd2 0–0 10.e3 g6+= 0.38) 9.Nbd2 ab4 10.ab4 Nc6= 0.13; C) 8.e3 a5 (8...Be7 9.Nf3 a5 10.b5 c6= 0.22) 9.Nf3 Be7 10.b5 c6= 0.22) 8.Nf3 (8.Nd2 Be7 (8...a5 9.Ngf3 ab4 10.ab4 Ra1= –0.18) 9.Ngf3 Ba6 10.e3 Bf1= –0.19; 8.e3 a5 (8...Ne4 9.Nc3 a5 10.Ne4 de4+= 0.35) 9.Nf3 ab4 10.ab4 Ra1= –0.08) 8...a5 (8...Be7 9.Nc3 a5 10.e3 0–0= 0.04) 9.Nc3 bc5 (9...ab4 10.ab4 Ra1= 0.01) 10.bc5 Ba6 11.e3 Bf1 12.Kf1 Qc7 13.e4 de4 14.Ne4 Rb8 (14...Be7!?+=) 15.Nf6+= Nf6 16.Bc3 (16.d5!? Rb2 17.Qb2 cd5 18.Qb5 Kd8 19.Rc1+/–) 16...Nd5+= 17.Bd2 Be7 18.g3 0–0 19.Kg2 Bf6 20.Rab1 h6 21.Qe4 Rfd8 22.g4 a4 23.h4 Rb1 24.Rb1 g6 25.g5 Bh8 26.h5 hg5 27.hg6+– Bf6 28.Rh1 fg6? 29.Ng5+– Bg5? 30.Bg5 Kg7 31.Qh4 Qf7 32.Qh6 (32.Qh6 Kg8 33.Qh8#) 1–0. Lenda,Lukasz (1855) – Golimowski,Pawel, Mistrzostwa Malopolski Gr–B, 2011.

5.a3 Be7 6.e3 0–0 7.Nf3 a5 8.b5 c5 9.Be2 d5 10.0–0 Nbd7 11.Nbd2 Rc8 12.Rc1 Ne4 13.Ne4 de4 14.Nd2 Bf6 15.Qc2 cd4 16.Bd4 Bd4 17.ed4 f5 18.f3 e3 19.Nb3 Nf6 20.c5 Bd5 21.c6 a4 22.Na1 Qd6 23.Qa4 Ra8 24.Qb4 Qb4 25.ab4 f4 26.Bd1 Ra7 27.Bb3 g5 28.Rfe1 Rc8 29.g3 Kf8 30.Bc4 Ra1 31.Bd5 Rc1 32.Rc1 Nd5 33.Kf1 Ke7 34.Ke2 Nb4 35.Rb1 Nd5 36.Rc1 Kd6 37.Kd3 Ra8 38.Ke4 e2 39.gf4 gf4 40.c7 Nc7 41.Kf4 Nb5 42.Ke3 Ra2 43.Re1 Kd5 44.Re2 Re2 45.Ke2 Nd4 0–1. kaasparov (1615) – ennio (1700), kurnik, 2012.

5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Bb4 9.Bc3 Bc3 10.Nc3 d6 11.Nf3 Nbd7 12.e3 e5 13.Be2 0–0 14.d5 Nc5 15.Qc2 Qd7 16.h3 Ra8 17.0–0 Ra5 18.e4 Qd8 19.Nd2 Qe7 20.g4 Nfd7 21.Kg2 Qh4 22.f4 ef4 23.Rf4 Ne5 24.Nf3 Nf3 25.Rf3 Nd7 26.Nd1 Ne5 27.Rf2 Ra3 28.Nc3 Bc8 29.Qb2 Ra5 30.Nd1 h5 31.Ne3 hg4 32.hg4 Bg4 33.Bg4 Ng4 34.Ng4 Qg4 35.Kf1 Qe4 36.Rg2 Qc4 37.Kg1 g6 38.Qf6 Qc1 39.Kh2 Ra1 40.Rg6 fg6 41.Qg6 Kf8 42.Qf6 Ke8 43.Qh8 Kd7 44.Qh3 Kd8 45.Qh8 Kd7 46.Qh3 Kd8 47.Qh4 Kd7 48.Qg4 Kd8 49.Qg5 Kd7 50.Qf5 Kd8 51.Qf6 Kd7 52.Qg7 Kd8 53.Qa1 Kd7 54.Qg7 1–0. blackiwhite (1625) – lorenzolotto, kurnik, 2012.

5.b5 a6 6.a4 ab5 7.ab5 Bb4 8.Nd2 Ra1 9.Ba1? (9.Qa1 Ne4 10.Ngf3 Nd2 11.Nd2 Bd2 12.Kd2 0–0=) 9...Qe7 (better is 9...Ne4 10.Ngf3 Qf6–+) 10.f3+= d5 11.e3 (11.Qc2 c6+=) 11...0–0 12.Bd3 (12.Qc2 c5+=) 12...dc4–/+ 13.Bc4 Nd5 14.Bd5 ed5 15.Ne2? Qe3–+ 16.Kf1 Re8 17.Nb1 Bc8 18.Bc3 Bc3 19.Nbc3 Bf5 20.Qc1 Qd3 21.Kf2 Nd7 22.Rd1 Qc4–/+ 23.Re1 Bd3–+ 24.Qd2 Nf6 25.Rc1?? Be2–+ 26.Ne2 Re2! 27.Qe2 Qc1 28.Qe7 Qc2 29.Kf1 Qd3 30.Ke1 Qc3 31.Ke2 Qc4 32.Ke3 Qc1 33.Kf2 h6 34.g4 Qd2 35.Kg3 Qe1 36.Qe1+– h5 37.gh5 Nh5 38.Kh4 Nf6 39.Qe7 Kh7 40.Qf6 gf6 41.Kg4 Kg6 42.Kf4 f5 43.h4 f6 44.h5 Kh5 45.Kf5 Kh4 46.Kf6 Kg3= 47.Ke5 Kf3 48.Kd5 Kf4?? 49.Kc6+– Kf5 50.Kc7 (50.Kc7 Ke4 51.Kb6+–) 1–0. ludice (1720) – wieczory (1625), kurnik, 2011.

5.c5 d6 6.cd6 Bd6 7.b5 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 0–0 11.e3 Nbd7 12.Nf3 Re8 13.Nbd2 Nf8 14.Be2 Qa8 15.0–0 Qa2 16.Qb3 Qb3 17.Nb3 Ra8 18.Ne5 N8d7 19.Bf3 Bf3 20.gf3 Ra3 21.Nd2 Ra2 22.Ne4 Ne4 23.fe4 Ne5 24.de5 Bc5 25.Rd1 g6 26.Bd4 Rc2 27.Kg2 Kf8 28.Kf3 Ke7 29.h4 h5 30.Bc5? Rc5–+ 31.Rb1 Re5 32.Kf4 Rc5 33.e5 f6 34.ef6 Kf6 35.e4 e5 36.Kg3 g5 37.hg5 Kg5 38.f3 h4 39.Kh3 Kf4 40.Kh4 Kf3 41.Rb4 Kf4 42.Kh5 c6 43.bc6 Rc6 44.Ra4 b5 45.Rb4 Rc4 46.Rb5 Re4 47.Kh4 Re1 48.Kh3 Rg1 49.Rb8 e4 50.Rf8 Ke3 51.Kh2 Rg7 52.Re8 Kd3 53.Rd8 Ke2 54.Re8 e3 55.Re6 Kd2 56.Rd6 Ke1 57.Re6 e2 58.Re8 Rd7 59.Kg2 Kd1 60.Kf2 Rf7 61.Kg3 e1Q (61...e1Q 62.Re1 Ke1–+) 0–1. typ48 – bebemicdetot, kurnik, 2012.

4.d4 g6

5.a3 Bg7 6.Nd2 d6 7.Qc2 Nbd7 8.e4 c5 9.bc5 dc5 10.d5 Ne5?? (10...0–0 11.Ngf3+=) 11.f4 (better is 11.Be5 Qd7 12.Ngf3+–) 11...Neg4 12.e5 Ne3 13.Qd3 Nfg4 14.h3 Nf1 15.Nf1 Nh6 16.Nf3 0–0 17.Ne3 f6 18.e6 Qc7 19.g3 Rad8 20.Kf2 Bc8 21.Qc2 g5? 22.f5 Bb7 23.a4 a6 24.Qb3 Rb8 25.Rab1 b5 26.ab5 ab5 27.Qc2 bc4 28.Qc4 Rfd8 29.Rhd1 Qd6 30.Ba3+– Rdc8 31.Rbc1 Ba6 32.Qc3 Rb5 33.Nc4 Qb8= 34.Bb2?? Nf5 35.g4?? Qg3 36.Ke2 Nh4 37.Nh4 Qh4 38.Kf1?? Rd8 39.Kg2? Rb4?? 40.Qg3?? Qg3–+ 41.Kg3 Rc4 42.Rc4 (42.Rc4 Bc4 43.Ba3 Rd5 44.Rd5 Bd5 45.Bc5–+). tyop (1740) – maudib, kurnik, 2012.

5.Qb3 Bg7 6.a4 Nc6 7.e3 Ng4 8.h3 Nh6 9.Nf3 e6 10.Bd3 Qe7 11.a5 ba5 12.ba5 0–0 13.Ba3 d6 14.Qb7 Na5 15.Qb5 Nc4 16.Qc4 Rfc8 17.Nbd2 c5 18.Rc1 cd4 19.Qc8 Rc8 20.Rc8 Bf8 21.Nd4 Qd7 22.Rc6 e5 23.Bb5 ed4 24.ed4 Qb7 25.Ba4 Nf5 26.Nb3 h5 27.0–0 Kh7 28.d5 h4 29.Na5 Qe7 30.Bb5 Qe4 31.Rd1 g5 32.Rc8 Bg7 33.Bd6 Nd6 34.Bd3 Qd3 35.Rd3 Nc8 36.d6 Bf6 37.d7 Nb6 38.d8Q Bd8 39.Rd8 Kg6 40.Nc6 a5 41.Na5 Na4 42.Rc8 Nb6 43.Rc6 f6 44.Rb6 Kf5 45.g3 hg3 46.fg3 g4 47.h4 Kg6 48.Nc4 Kf5 49.Ne3 Ke4 50.Ng4 Kf3 51.Nf6 Kg3 52.h5 Kh4 53.h6 Kg5 54.h7 Kg6 55.h8Q Kf5 56.Qh5 Kf4 57.Rb4 Ke3 58.Qh3 Kd2 59.Rb2 Kc1 60.Qc3 Kd1 61.Qd2 1–0. blackiwhite (1805) – picus52 (1615), kurnik, 2012. (=1.c4 b6 2.b4 Bb7 3.Bb2 Nf6)

5.Nc3 Bg7 6.Qc2 0–0 7.e4 d6 8.b5 Nbd7 9.Bd3 e6 10.Nge2 c5 11.d5 Ne5 12.0–0 Nd3 13.Qd3 ed5 14.ed5 Re8 15.Ng3 a6 16.a4 ab5 17.ab5 Qd7 18.h3 Ra1 19.Ra1 Ra8 20.Ra8 Ba8 21.Bc1 Qe7 22.Be3 Nd7 23.Qe4 Qe4 24.Nce4 Be5 25.f4 Bg7 26.Nd6 Nf6 27.Nge4 Nd7 28.g4 White prepares the advance f5 28...Kf8 29.f5 Ke7 30.Nc8 Kd8 31.Na7 Kc7 32.Bf4 Be5 33.Bg5 f6 34.Bh6 g5 35.Bg7 Kd8? 36.Nc6 Bc6 37.dc6 Nb8 38.Bf6 Bf6 39.Nf6 Ke7 40.Nh7 (40.Nh7 Nc6 41.f6 Ke6 42.bc6+–) 1–0. tyop (1755) – maudib, kurnik, 2012.

5.Nc3 Bg7 6.e3 0–0=.

5.Nc3 Bg7 6.Nf3 d6 7.g3 e6 8.b5 Bf3 9.ef3 Nbd7 10.Bg2 Rb8 (10...a6!?=) 11.0–0 0–0 12.f4 White plans d5 12...e5 13.fe5 de5 14.d5 Ne8 15.a4 Nd6 16.Ba3 Nf6 17.Re1 Re8 18.Qb3 Ra8 19.Ra2 a5 20.Rae2 Nd7 21.Ne4 Ne4 22.Re4 f6 23.Qd1 Bf8 24.Bf8 Kf8 25.R1e2 Kg7 26.Qe1 Nc5 27.R4e3 Na4 28.f4 Nc5 29.fe5 fe5 30.Re5 Re5–/+ 31.Re5 Rb8?? 32.Re7 Kg8?? 33.Qe5 Qf8 34.Rc7 Re8 35.Qd4?? Re1 36.Bf1 Qf1# 0–1. kannisogoet – slavisko, kurnik, 2012.

5.Nd2 d6 6.f3 Bg7 7.e4 0–0 8.Bd3 c5 9.bc5 dc5 10.d5 Na6 11.a3 e6 12.Ne2 ed5 13.cd5 Nc7 14.0–0 Ba6 15.Ba6 Na6 16.Qa4 Nc7 17.Rfd1 b5 18.Qa5 c4 19.Nf1 a6 20.Kh1 Nd7 21.Bg7 Kg7 22.a4 Nc5 23.d6 N7e6 24.ab5 ab5 25.Qb5 Ra1 26.Ra1 Qd6 27.Qc4 Qb6 28.Nd4 Nd4 29.Qd4 Kg8 30.Rc1 Rc8 31.h3 Qb5 32.Ne3 h5 33.Nd5 Kh7 34.Nf6 Kh6 35.Nd7 Qd7 36.Qd7 Nd7 37.Rc8 Ne5 38.Re8 Nd3 39.Re7 Kg7 40.Rd7 Ne5 41.Ra7 Kf6 42.h4 Nd3 43.Kh2 Ke5 44.Rf7 Ke6 45.Rg7 Kf6 46.Ra7 Ne5 47.f4 Nd3 48.Ra6 Kg7 49.g3 Ne1 50.e5 Nf3 51.Kg2 Ne1 52.Kf2 Nd3 53.Ke3 Nb4 54.Ra7 Kf8 55.e6 Nd5 56.Ke4 Nf6 57.Ke5 Ng4 58.Kd6 Nf6 59.Ra8 Kg7 60.Rb8 Ne4 61.Ke5 Nc5 62.f5 gf5 63.Kf5 Kh6 64.e7 Nd7 65.e8Q Nb8 1–0. tyop (1795) – azatied (1730), kurnik, 2012.

5.Nd2 Bg7 6.Qc2 d6 7.e4 c6 8.Bd3 0–0 9.Ne2 d5 10.e5 Nfd7 11.c5 bc5 12.bc5 e6 13.f4 Na6 14.a3 Qh4 15.g3 Qh3 16.Kf2 Bh6 (better is 16...f6!? 17.Nf3 fe5=) 17.Ng1+/– Qg4 18.Be2 Qf5 19.Qf5 ef5 20.Ngf3 Bg7 21.Bc3 Nac5? (better is 21...Nc7!?+/–) 22.dc5+– Nc5 23.Bd4 Nd7 24.Nb3 a5 25.Nc5 Nc5 26.Bc5 Rfe8 27.Rhb1 Ba6 28.Ba6 Ra6 29.Rb7 Bf8 30.Bf8 Rf8 31.Rc1 Rc8 32.a4 c5 33.Rb5 c4 34.Rd5 c3 35.Rd3 Rac6 36.Nd4 Rc4 37.Nb5 c2 38.Na3 Ra4 39.Rc2 Ra3 40.Rc8 Kg7 41.Ra3 h5 42.Ra5 f6 43.Ra7 Kh6 44.Rh8# 1–0. tyop (1720) – junior40, kurnik, 2012.

5.f3 Bg7 6.e4 0–0 7.e5 Nh5 8.Nc3 Bh8 9.Nge2 f6 10.g4 (10.ef6 Nf6 11.a3 Nc6=) 10...Ng7 11.e6 (11.ef6 Rf6 12.Bg2 Bf3+=) 11...de6 (11...Bf3 12.Rg1–/+) 12.d5 ed5 13.cd5 f5 14.Bg2 fg4 15.f4 Nf5 16.0–0? (better is 16.Qb3 Rf7 17.Be4–+) 16...Ne3 17.Qd3 Nf1 18.Rf1 Nd7 19.Nd4 Bd4 20.Qd4 Nf6 21.f5 Qd6 22.fg6 hg6 23.Ne4 Qd8 24.Nf6 ef6 25.Qg4 Qe8 26.Qe6?? Can f6 get defended? 26...Qe6–+ 27.de6 Bg2 28.Kg2 Rae8 29.Re1 Re7 30.Kg3 Kg7 31.Rf1 Re6 32.h4 Re3 33.Kf4 Rfe8 34.h5 gh5 35.Kf5–+ Rf8 36.Bd4 Rg3 37.Bf2 Rg5 38.Kf4 Rb5 39.Be1 c6 40.a4 Rg5 41.Bd2 Rg4 42.Kf5 Re8 43.Bf4 Rg2 44.Rf3 Ree2 45.Bd6 Rgf2 46.Kf4 Rf3 47.Kf3 Ra2 48.a5 Kg6 49.ab6 ab6 50.Bc7 b5 51.Bd6 Rb2 52.Bc5 Kg5 53.Kg3 f5 54.Kh3 Rc2 55.Kg3 Rc5! 56.bc5 b4 57.Kf3 b3 58.Ke3 b2 59.Kd4 b1Q 60.Ke5 h4 61.Kd6–+ Qb4 62.Kc6 Qc5! 63.Kc5 f4 64.Kd4 f3 65.Kd5 f2 66.Ke5 ½–½. dtpwaldi – 483kc, kurnik, 2011.

5.Nf3 Bg7 6.Nc3 0–0 7.e4 e6 8.e5 Ne8 9.Be2 d6 10.0–0 de5 11.Ne5 Nc6 12.Nc6 Bc6 13.Bf3 Bf3 14.Qf3 Qd4 15.Rad1 Qf6 16.Qa8 Nd6 17.Qa7 Nc4 18.Ba1 Qg5 19.Qc7 Ne5 20.Qb6 Nf3 21.Kh1 Nh4 22.Qc6 Nf5 23.a4 h5 24.Ne4 Qg4 25.Bg7 Kg7 26.Qc3 Kh6 27.f3 Qf4 28.Qd2 Qd2 29.Rd2 Rb8 30.b5 Ra8 31.Ra2 Ra5 32.Rc1 Ne3 33.Rc7 Nd5 34.Rf7 Nb4 35.Ra1 Nc2 36.Ra2 Nb4 37.Ra3 Nc2 38.Ra2 Nb4 ½–½. zosiaka – junior40, kurnik, 2012.

5.Nf3 Bg7 6.e3 0–0 7.Nc3 d5 8.c5 bc5 9.bc5 Nc6 10.a3 Ne4 11.Bd3 Nc3 12.Bc3 Re8 13.Bb5 a6 14.Ba4 Rf8 15.Rb1 Qc8 16.Qb3 Nd8 17.Ba5 (17.0–0 Qe6+/–) 17...Bc6+= 18.0–0 Ba4 19.Qa4 c6? (19...Ra7 20.c6+=) 20.Rb6 (20.Bd8 Rd8 21.Rb6 Qf5+–) 20...Rb8 21.Rfb1 Rb7 22.h3 e5 23.Ne5+– Be5 24.de5 Re8 25.f4 Rb6 26.Rb6 Ne6 27.Qc6 Nc5 28.Qc8 Rc8 29.Bb4 Nd3 30.Ra6 h5 31.e6 fe6 32.Re6 Kf7 33.Rd6 Rc1 34.Kh2 h4?! 35.Rd5 Nf2 36.g3 Rc2 37.Rd2 hg3 38.Kg1 Rc1 39.Kg2 Ne4 40.Rd7 Ke6?? 41.Re7 Kf5 42.Re5 Kf6 43.Re4 Rc2 44.Kg3 Kf5 45.Re5 Kf6 46.Be7 Kf7 47.Bg5 Ra2 48.Re7 Kf8 49.Ra7 Ke8 50.Bf6 Re2 51.Kf3 Rh2 52.h4 Rh1 53.e4 Rh3 54.Kg4 White intends f5 54...Re3 55.e5 Re2 56.f5 Rg2 57.Kf3 Rg1 58.fg6 Rg6+– 59.Kf4 Rg1 If Black now would get Kf5 in, he might survive 60.Kf5 Rf1 61.Ke6 Rf6 62.ef6 Kd8 63.f7 (63.f7 Kc8 64.f8Q#) 1–0. blackiwhite (1780) – bebi52 (1705), kurnik, 2012. (=1.c4 b6 2.b4 Bb7 3.Bb2 Nf6)

4.e3 e6

5.a3 a5 6.b5 c6 7.Nf3 cb5 8.cb5 Be7 9.d4 0–0 10.Be2 d6 11.0–0 Nbd7 12.Nbd2 Rc8 13.Rc1 e5 14.de5 de5 15.Ne5 Ne5 16.Be5 Ba3 17.Rc8 Qc8 18.Bf6 gf6 19.Bf3 Rd8 20.Bb7 Qb7 21.Qg4 Kh8 22.Qf4 Rd2 23.Qf6 Kg8 24.Rb1 Qe4 25.Ra1 Qd5 26.h3 Bb2 0–1. kaasparov – adelina25, kurnik, 2012.

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

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

5.b5 d5 6.Nf3 Bd6 7.Be2 c5 8.a4 Nbd7 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.b5 d5 6.Nf3 Be7 7.a4 c5 8.Be2 Nbd7 9.0–0 0–0 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).

4.e3 g6

5.a4 Bg7 6.Nc3 0–0 7.Nf3 d6 8.Be2 e6 9.0–0 Nbd7 10.d4 a6 11.Qc2 d5 12.c5 bc5 13.bc5 c6 14.a5 Ne4 15.Ne4 de4 16.Nd2 f5 17.Nc4 Rb8 18.Bc3 Bc8 19.Rfb1 Rb1 20.Rb1 e5 21.de5 Nc5 22.Nd6 Be6 23.Bd4 Nd7 24.Qc3 c5 25.Bc5 Nc5 26.Qc5 g5 27.Ba6 f4 28.Bc4 Bc4 29.Qc4 Kh8 30.Nf7 Rf7 31.Qf7 fe3 32.fe3 h6 33.e6 Qa5 34.e7 1–0. rom49szachy – am121, kurnik, 2012.

5.f4 Bg7 6.Nf3 0–0 7.d4 d5 8.b5 (8.Nc3 Nbd7=) 8...c5 9.Nbd2 a6 10.a4 Ne4 11.Ne4 de4 12.Ne5 Nd7 (12...f6 13.Ng4=) 13.Be2 Rc8 14.0–0 Qc7 15.Nd7 Qd7 16.Qc2 (better is 16.Rb1!? cd4 17.Bd4 Bd4 18.Qd4 Qd4 19.ed4+=) 16...cd4+= 17.ed4 Bd4 18.Bd4 Qd4 19.Kh1 ab5 20.ab5 f5 21.Rfd1 Qe3 (21...Qc5 22.Qd2+=) 22.Qd2 Qd2–/+ 23.Rd2 Rfd8 24.Rad1 Rd2 25.Rd2 Rc7 26.Kg1 Kf7 27.Kf2 Ke6 28.Ke3 Rd7 29.Ra2 Kd6 30.Rd2 Kc7 31.Rd7 Kd7 32.Kd4 Kd6 33.g4 Bc8 34.gf5 gf5–/+ 35.Bh5 Be6 36.Be2 Bf7 37.h4 Be8 38.Bf1 Ke6 39.c5 bc5 40.Kc5 Kf6?? 41.b6+– e5 42.b7 ef4 43.b8Q Bf7 44.Qf4 (44.Qf4 Bg8 45.Qh6 Ke7 46.Qg7 Kd8 47.Kd6 Bf7 48.Qf7 f4 49.Qd7#) 1–0. carocan – kastaldi (1810), kurnik, 2012.

5.Nf3 Bg7

6.b5 0–0 7.Nc3 Ne4 8.Qc2 Nc3 9.Bc3 Bc3 10.Qc3 Bf3 11.gf3 d6 12.Bg2 Nd7 13.f4 Rc8 14.Bb7 Rb8 15.Bg2 Nc5 16.Qa3 Nd3 17.Qd3 e5 18.fe5 de5 19.Qd8 Rbd8 20.Rd1 Rd3 21.Be4 Ra3 22.Ra1 Rd8 23.d3 f5 24.Bd5 Kg7 25.Ke2 a6 26.Rhd1 ab5 27.cb5 Ra5 28.Bc4 Rd6 29.a4 Kf6 30.d4 ed4 31.ed4 Ra8 32.Rd3 Re8 33.Kf3 Re4 34.Rad1 c6 35.bc6 Rc6 36.Bd5 Rce6 37.Be6 Ke6 38.d5 Kd6 39.Rd4 Re7 40.Rc1 Ra7 41.Rc6 Ke5 42.Rb4 Kd5 43.Rcb6 Kc5 44.R6b5 Kc6 45.a5 Ra6 46.Rb6 Rb6 47.Rb6 Kc7 48.Rb3 Kc6 49.a6 Kc5 50.a7 Kc4 51.Rb8 Kc5 52.a8Q Kd6 53.Re8 Kc5 54.Qd8 Kb5 55.Qd7 Kc5 56.Rc8 Kb4 57.Qb7 Ka3 0–1. thecat74 – espoll, kurnik, 2012.

6.d4 0–0 7.Be2 a5 8.b5 c6 9.a4 d6 10.0–0 Nbd7 11.bc6 Bc6 12.Nbd2 Ne4 13.Ba3 (13.Ne4 Be4 14.Nd2 Bc6+=) 13...Rb8 (better is 13...Nc3 14.Qe1 Na4+=) 14.Rb1?? (better is 14.Ne4 Be4 15.Bb2+=) 14...Nc3–+ 15.Qe1 Nb1 16.Qb1 Ba4 17.Qa2 Bc6 18.Rb1 Qc7 19.Ne1 Rfc8 20.f4 Nf6 21.h3 Ne4 22.Ndf3 Nc3 23.Qb2 Nb1 24.Qb1 Bf3 25.Nf3 Qc6 26.Nd2 Qa4 27.Qc1 White prepares the advance c5 27...b5! 28.c5 b4 29.Bb2 dc5 (29...dc5 30.Bg4 e6 31.dc5 Bb2 32.Qb2 Qa3–+) 0–1. carocan (1700) – m2405 (1735), kurnik, 2012.

6.d4 0–0 7.Be2 a6 8.a4 a5 9.b5 e6 10.Nbd2 d5 11.0–0 dc4 12.Nc4 Nbd7 13.Nce5 Nd5 14.Nc6 Bc6 15.bc6 Nb8 16.Qc2 (16.Bb5!?+=) 16...Nb4= 17.Qc3 N8c6 18.Ba3 Qd7?? (better is 18...Ne7!?+=) 19.Rfc1 (19.Bb5!? Nd4 20.ed4 Qd6+–) 19...Rfc8 (19...Qd8 20.Bb4 Nb4 21.Qc7 Qc7 22.Rc7+=) 20.Bb5+/– Bf8? (better is 20...Nd4 21.ed4 c6+/–) 21.Bc6 Nc6 22.Qc6 Qc6 23.Rc6 Ba3 24.Ra3 Kf8 25.Ne5 f6 26.Ng4 Ke7 27.Rac3 Kd7 28.Nf6 Ke7 29.Ne4 Kd7 30.Ng5 Rab8 31.Ne6 b5 32.ab5 Rb5 33.g3 Rb7 34.d5 Ra7 35.Nc5 Kd8 36.Na4 Rb7 37.e4 Rb4 38.R3c4 Rc4 39.Rc4 Kd7 40.e5 Rb8 41.Rc5 Rb1 42.Kg2 Re1 43.e6 Kd6 44.Ra5 Re4 45.Nc3 Rc4 46.Ne2 c6 47.dc6 Ke6 48.Ra6 Ke5 49.h4 h5 50.Nf4 Kf5 51.c7! Rc7 52.Rg6 Rh7 53.Rg5 Ke4 54.Rh5 Rf7 55.Ra5 Rh7 56.h5 Rh6 57.f3 Ke3 58.g4 Kf4 59.Rf5 Ke3 60.Kg3 Rh8 61.Kh4 Ra8 62.h6 Ra1 63.Kg5 Rg1 64.h7 Rh1 65.Kg6 Kd4 66.Kg7 Ke3 Plans Rh5 67.h8Q Rh8 68.Kh8 (68.Kh8 Kd2 69.g5 Kc2 70.g6 Kc3 71.g7 Kb3 72.g8Q Kc3 73.Qg4 Kb3 74.Rb5 Kc3 75.Rc5 Kd2 76.Qf4 Kd3 77.Qe4 Kd2 78.Rc2 Kd1 79.Qe2#) 1–0. carocan (1660) – hamdija1948 (1740), kurnik, 2012.

6.d4 e6 7.Be2 Qe7 8.a3 Nc6 9.0–0 h5 10.b5 Na5 11.Bc3 h4 12.Ba5 ba5 13.Nbd2 h3 14.g3 Ng4 15.Ne5 Nf6 16.Bf3 d5 17.c5 Ne4 18.c6 Bc8 19.Ne4 de4 20.Be4 Be5 21.de5 0–0 22.Qg4 Qc5 23.Qh3 Qe5 24.Qg2 Qb5 25.Rab1 Qe5 26.f4 Qd6 27.a4 Ba6 28.Rfd1 Qa3 29.Bc2 Qe3 30.Kh1 Rad8 31.Qe4 Rd1 32.Rd1 Qc3 33.Rd7 Qa1 34.Kg2 Qa3 35.h4 Qb4 36.Qe5 Bc4 37.h5 Bd5 38.Kh3 Qd2 39.Be4 Qe1 40.Bd5 Qe5 41.fe5 ed5 42.Rd5 Rc8 43.hg6 fg6 44.e6 Kg7 45.Rd7 Kf6 46.e7 Re8 47.Rc7 Ke6 0–1. kaasparov – andishoshaj, kurnik, 2012.

6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 b6 6.Be2 Bb7).

4.Nf3 e6

5.a3 c5 6.b5 a6 7.a4 (7.ba6 Ba6 8.e3 d5=) 7...ab5 8.ab5 Ra1 9.Ba1 d5 10.cd5 ed5 11.e3 c4 (better is 11...Bd6!?+=) 12.d3+= Bb4 13.Bc3 Bc3 14.Nc3 cd3 (14...Qc7 15.dc4 dc4 16.Nd2=) 15.Bd3+= 0–0 (15...d4 16.ed4 Bf3 17.Qf3 Qd4 18.Qe2 Kf8 19.Nb1+=) 16.0–0 Re8 17.Bf5 Bc8 (17...Qd6!?+=) 18.Bc8+/– Qc8 19.Nd5 Nd5 20.Qd4?? (better is 20.Qd5 Rd8 21.Qh5+–) 20...Rd8–+ 21.Rd1 Qe6?? (better is 21...Rd7 22.Ra1 Nc3 23.Qb6 Rb7–+) 22.e4+/– Nd7 23.Qd5 Qf6?? (better is 23...Qd5 24.Rd5 Kf8+–) 24.Ne5!! (24.Ne5 Nf8 25.Ng4+–) 1–0. Fournier,Frederic – Amichai_G, rated blitz game (5/5), 2002.

5.a3 c5 6.b5 d5 7.cd5 ed5 8.e3 Bd6 9.Be2 0–0 10.0–0 Nbd7 11.Nc3 Ne4 12.a4 Qe7 13.d3 Nc3 14.Bc3 d4 15.ed4+= cd4 16.Nd4 Rac8 17.Qd2+= Rc3 18.Qc3+/– Qf6 19.Qc4 Ne5?? 20.Qc2 Qh4 21.f4 Bc5 22.Kh1 Bd4 23.Qc7 Bg2 24.Kg2 Ba1 25.fe5 Qg5 26.Kh1 Be5 27.Qc2 g6 28.Bf3 Rd8 29.Be4 Kg7 30.Qa2 f6 31.a5 ba5 32.Qa5 Rd7 33.Qe1 Qh6 34.Qe2 Kh8 35.Qc2 Rd8 36.Qe2 Rd4 37.Rb1 Qf4 38.Kg1. Curlywurly – Benjap, ChessWorld.net, 2003.

5.a3 d5 6.cd5 Bd5 7.e3 a6 8.Nc3 Bb7 9.d4 Bd6 10.Bd3 Nbd7 11.0–0 Ng4 12.g3 Qf6 13.Ne4 Qh6 14.Qc2 0–0–0?? 15.Nd6+– (15...Kb8 16.Nf7+–) 1–0. Wall,Bill – Pare, Internet, 2001.

5.a3 Bf3 6.ef3 c5 7.Qb3 Be7 8.Be2 (8.Bd3 0–0=) 8...0–0+= 9.Nc3 (9.0–0 d5=) 9...Nc6 10.b5 (10.bc5 Nd4 11.Qa4 Bc5–/+) 10...Nd4 11.Qd1 d5 12.0–0 Ne2 13.Qe2 dc4 14.Qc4 Qd2 15.Na4 (15.Rfd1 Qb2 16.Ra2 Qa2 17.Qa2 a6+=) 15...Nd5 (15...Rfd8 16.Be5–+) 16.Rad1 (16.Rfd1 Qa5–/+) 16...Qg5 (16...Qa5 17.Nc3 Bf6 18.Rd3–+) 17.Bc1 (17.Nc3 Rfd8–/+) 17...Qg6 (17...Qh4 18.f4–+) 18.Nc3 (18.Rfe1 Bf6–/+) 18...Nc3 (18...Qc2!? 19.Bd2–+) 19.Qc3–/+ Bf6 20.Qc4 Rad8 (20...Rfd8 21.Rfe1–/+) 21.Qe2 Qf5 22.g4 Qg6 23.Kh1 Bd4 24.h4 f5 25.Bg5 Rde8 26.Qd2? h6 27.Bf4? fg4 28.Rg1 h5 29.Be3 Rf3 30.Kg2 Qe4 31.Kh2 g3! 32.fg3 Be3 A double attack (32...Be3 33.Qg2 Rf2–+) 0–1. dannyboy238 – Freyser, ChessWorld.net, 2004. (=1.c4 Nf6 2.b4 b6 3.Bb2 Bb7)

5.Qb3 d5 6.e3 dc4 7.Bc4 Nbd7 8.Nc3 Be7 9.Be2 0–0 10.0–0 c5 11.b5 a6 12.a4 a5 13.h3 Re8 14.Rfd1 Nf8 15.d4 cd4 16.Nd4 Qc8 17.Rac1 Qb8 (17...Bc5 18.Qc4+=) 18.Bf3 (better is 18.Nc6!? Bc6 19.bc6+–) 18...Bf3+= 19.gf3 (19.Nf3 N8d7+=) 19...Bc5 (19...Qe5!?=) 20.Nc6+= Qb7 21.Ne2 Nd5 22.e4 Ne7 23.Qc3 f6 24.Qc4 (better is 24.Ned4!?=) 24...Nc6–/+ 25.bc6 Qc6 26.Nd4 Qc8 27.Nf5 Kh8 28.Ng3 Ng6 29.Rd2 Bb4 30.Qc8 Rac8 31.Rc8 Rc8 32.Rd7 Nf4 33.Bd4 Bc5 34.h4? Bd4–+ 35.Rd4 h6 36.Rd6 Rc1 37.Kh2 Rb1 38.e5 fe5 39.Ne4 Rb4 40.Rc6 Ra4 41.Rb6 Ra2 42.Ra6 a4 43.Kg3 a3 44.Nc3 Ra1 45.Kh2 Kh7 46.Nb5 a2 47.Nc3 Kg6 48.Ra2 Ra2 49.Na2 Kf5 50.Nc3 Nd3 51.Ne4 g5 52.Kg3? gh4–+ 53.Kh4 Kf4 54.Kh5 Kf3 55.Nd6 e4 56.Kh6 Nf2 57.Kg5 e3 58.Nc4 e2 59.Nd2 Ke3 60.Nc4 Kd4 61.Nd2 e1Q 62.Nf3 (62.Nf3 Ke3 63.Ne1–+) 1–0. orangutanb4 (1930) – tondajan (1800), kurnik, 2011.

5.b5 d5 6.e3 Nbd7 7.d4 Bb4 8.Nbd2 Ne4 9.Be2 Ndf6 10.0–0 0–0 11.a3 Bd6 12.Nb3 a6 13.a4 dc4 14.Bc4 ab5 15.ab5 Ra1 16.Ba1 Qa8. Pennell – Gray, North Carolina 1980.

5.d3 Bb4!? 6.Nbd2 0–0–/+.

5.d3 Be7 6.a3= d5 7.Nbd2 0–0 8.g3 c5 9.bc5 Bc5 10.d4 Be7 11.cd5 Nd5 12.Bg2 Nd7 13.0–0 N7f6 14.e4 Nc7 15.Re1 Rc8 16.Rc1 Na6 17.Qe2 Rc1 18.Rc1 h6 19.Nc4 (better is 19.Ne5+=) 19...Be4–/+ 20.Nce5 Nc7 21.Nc6 Bc6 22.Rc6 Ncd5 23.Ne5 Qa8 24.Qc2 Qd8 25.h3 Bd6 26.Nc4 Bb8 27.Ne3 h5 28.Kh2 h4 29.Nd5 hg3 30.fg3 Nd5 31.Qc4? (better is 31.Qb3–/+) 31...Qg5–+ 32.Bd5 Qg3 (32...Qg3 33.Kh1 Qh2; 32...Qd5?! 33.Qd5 ed5 34.Kg2–/+; 32...ed5?! 33.Qd3–+) 0–1. sagonek – podlipieta13, kurnik, 2011.

5.e3 Bb4–/+ 6.Be2 0–0 7.0–0 Be7 8.Qc2 Nc6 9.a3 a5 (9...Re8 10.d4+=) 10.Ng5 (10.d4 d5+=) 10...g6 (10...Re8 11.Bh5 g6 12.Bf3–/+) 11.f4 h6 12.Nf3 d6 13.Qc3 d5 14.g4 d4 (14...Kh7+=) 15.ed4? (better is 15.Nd4!? Ne4 16.Qc2 Nd4 17.Bd4=) 15...Ng4–/+ 16.d5 Bf6 17.Qc2? (better is 17.d4 ed5 18.h3–/+) 17...ed5–+ 18.h3 Qd7 19.cd5 Ne7 20.hg4 Qg4–+ 21.Kf2?? Bb2 22.Qb2–/+ Qf4 23.Qd4 Nd5 24.Qf4 Nf4–+ 25.Rc1 c5 26.Nc3 Rfe8 27.Rab1 Re6 28.Bc4 Rd6 29.d3? Re8 30.Nb5?? Nd3 31.Bd3 Rd3 32.Rc3 Rc3 33.Nc3 Bf3 34.Kf3 Re6 35.Nd5 h5 36.Nb6 Kg7 37.Nc4 g5 38.Na5 Rf6 39.Kg3 Ra6 40.Rb5+= f6 41.Rc5= Kg6 42.Nc4 Ra4 43.Rc6 Kf5 Black prepares g4 44.Ne3 Kg6 Black prepares h4 45.Rc3 h4 46.Kh3 Kh5 47.Rb3 g4? 48.Kg2?? g3 49.Kh3= Kg5 50.Ng2 f5 51.Rf3 f4 52.Nh4+/– 1–0. orangutanb4 (1880) – kapibara8 (1880), kurnik, 2011.

3.d3 Nc6

4.b5 Na5 5.c4 Nf6 6.Nd2 g6 7.Bc3 Bg7 8.Rb1 0–0 9.Ba5 ba5 10.Nb3 c6 11.a4 (11.Nc5 Bc8=) 11...d5 12.Nc5 (12.c5 Nd7 13.Qd2 e5+=) 12...Qc7 (12...Nd7 13.Nb3 dc4 14.dc4 cb5 15.cb5 Bc3 16.Nd2 Nb6–+) 13.Nb7= Qb7 14.c5? (14.e3 dc4 15.dc4 Ne4 16.bc6 Qa6–/+) 14...e6?? (better 14...Ne4 15.Rc1 Bc3 16.Rc3 Nc3–+) 15.Qd2 (15.e3 d4 16.ed4 Nd5=) 15...Nd7 (15...cb5 16.Rb5 Qc6 17.e3–/+ (worse 17.Qa5 Nd7–+; worse 17.Ra5 Rfb8 18.f3 Qc7–+)) 16.d4 Rfe8 (16...e5 17.e3= (worse 17.Qa5 ed4 18.Rc1 Rfc8–/+)) 17.e3 e5 18.Ne2 (18.de5 a6 19.b6 Bf8=+) 18...ed4= 19.ed4 Nf6 (19...Rab8 20.h4=) 20.f3 Re6 21.Rb3 (21.Qa5 Rae8+=) 21...Rae8 22.Kf2 Qe7 23.bc6 Rc6 24.Nf4 Ne4? (24...Bh6 25.Bb5 Bf4 26.Qf4 Ne4 27.Kg1 Nc5=+) 25.fe4+– Qe4 26.Ne2 Qh4 (26...Rf6 27.Ke1+–) 27.g3 Qe4 (27...Rf6 28.Nf4 Rf4 29.Qf4 Bd4 30.Kg2 Qf4 31.gf4 Bc5+–) 28.Re3?? (better 28.Bg2 Qe2 29.Qe2 Bd4 30.Kf1 Re2 31.Ke2 Rc5 32.Rd1 Rc2 33.Rd2 Rd2 34.Kd2+–) 28...Rf6–+ 29.Nf4 (29.Kg1 Qe3 30.Qe3 Re3 31.h4–+) 29...Rf4 30.gf4 Bd4 31.Qd3 (31.Ke2 Be3 32.Qd3 Qh1–+) 31...Be3 (31...Qf4 32.Ke1 Re3 33.Kd2 Rd3 34.Kd3 Qe3 35.Kc2 Bc3 36.Kb3 Qd2 37.c6 Qb2) 32.Ke1 (32.Ke2 Qh1 33.Kd1 Re4–+) 32...Qh1 33.Qb5 Qe4 (33...Re4 34.Kd1 Rd4 35.Kc2 Qh2 36.Kb3 Qf4 37.Qe8 Kg7 38.Qb8 Qb8 39.Bb5 Rd3 40.Kc2 Qh2 41.Kd3 Qd2) 34.Kd1 (34.Bd3 Qe7 35.Be2 Bf4–+) 34...Qd4 (better 34...Bf4 35.Be2 Qe3 36.Qe8 Qe8 37.Ke1 Qa4 38.c6–+) 35.Bd3 Rc8 36.Ke2 Qf4 37.Qa5 Qf2 38.Kd1 Rc5 (38...Rc5 39.Qd8 Kg7 40.Qf6 Kf6 41.Bg6 Rc1) 0–1. petrobbo (2035) – ShockMate (2010), ChessWorld.net, 2020.

3.d3 d5

4.e3 e6 5.Nd2 Bb4?? (better 5...Nf6 6.a3 c5=) 6.Bg7+– Bc3 7.Bh8 (7.Bc3 Nf6+–) 7...Ba1? (better 7...Bh8 8.d4 c5+–) 8.Ba1 Nc6 9.Ngf3 Qb8 (9...Qd6 10.c4+–) 10.Be2 (10.Ne5 h6+–) 10...Qd8 11.Qb1 Qe7 12.Qb2 0–0–0 13.Qa3 (13.0–0 f6+–) 13...Qd7 (better 13...Qa3 14.0–0 Nb4–+) 14.Ne5 Ne5 15.Be5 f6 16.Bg3 e5 (16...Kb8 17.d4+–) 17.Qa7 Ne7 18.0–0 Ng6 (18...Nc6 19.Qa4+–) 19.c4 e4 (19...dc4 20.Nc4 Ne7 21.f4+–) 20.d4 f5 21.Nb3 White intends c5 (21.c5 Ne7 22.Ba6+–) 21...c6 (21...dc4 22.Bc4 f4 23.ef4 Qc6+–) 22.c5 (22.Qb8) 22...b5 (22...f4 23.ef4 Rf8 24.cb6+–) 23.Na5 (23.Qb8) 23...f4 24.ef4 (24.Bg4 Ba6 25.Qa6 Kb8 26.Bd7 Rd7 27.Nc6 Kc7 28.Qb6 Kc8 29.Qb8) 24...Ne7 25.f5! Nf5 (25...Qf5 26.Qb7 Mate attack; 25...Nf5 26.Qb8 Mate attack) 26.Qb8 1–0. alessandrocarvalhaes (1825) – wskt006, lichess.org, 2020.

4.Nf3 Nd7 5.e3 Ngf6 6.Nbd2 (6.a3 e6=) 6...e6 7.b5 (7.a3 Bd6=) 7...a5 (7...a6 8.ba6 Ba6 9.Be2=+) 8.Be2= a4 (8...Bd6 9.0–0=) 9.0–0 Bb4 (9...Bd6 10.c4=) 10.c3 (10.c4 a3 11.Bd4 Bd6=) 10...Bd6 (10...a3 11.cb4 ab2 12.Rb1 Ra2 13.Qb3=) 11.c4 (11.a3 0–0=) 11...0–0 (11...a3 12.Bf6 Qf6 13.d4=) 12.Qc2 (12.a3 Ra5=) 12...a3 (12...e5 13.a3=) 13.Bc3 Rc8 (13...e5 14.d4 e4 15.Ne5=) 14.Nd4 (14.Rac1 Qe7=) 14...c5 (14...Ne5 15.Rab1=) 15.bc6 Bc6 16.Rab1 e5 17.Nc6 Rc6 18.h3 (18.Bf3 Qc7 19.h3+=) 18...e4 (18...dc4!? 19.Nc4 Qc7=) 19.de4+– de4 (19...dc4 20.Nc4 Qc7 21.Rfd1+–) 20.Ne4 Ne4 21.Qe4 Qc8 (21...Qc7 22.Rfd1+–) 22.Rb5 (22.Rfd1 Rd8+–) 22...Nc5 (22...Re8 23.Qf5+–) 23.Qd4 f6 (23...Ne6 24.Qh4+–) 24.Bg4 (24.Rfb1 Rd8 25.Qh4+– (25.Rb6? Bh2 26.Kh1 Rd4 27.Rc6 Qc6 28.ed4 Ne4–+)) 24...Qc7 (better 24...Ne6!? 25.Qd3 Re8+–) 25.Bf3 Be5? (25...Ne6 26.Qe4 Nd8+–) 26.Qd5 Re6 27.Rc5! Qc5 (27...bc5 28.Qe6 Remove defender; 27...Qc5 28.Qe6 Remove defender) 28.Qe6 Kh8 29.Be5 fe5 30.Bd5 b5 31.Rb1 bc4 (31...b4+–) 32.Rb7 c3 (32...Rd8 33.Qg4 Qf8+–) 33.Qd7 (33.Qd7 Rg8 34.Qg7 Rg7 35.Rb8 Qf8 36.Rf8 Rg8 37.Rg8) 1–0. Janek – Silvmoon, internet, 2017.

4.Nf3 Nd7 5.g3 e5 6.a3 Bd6 7.Nc3 Ne7 (7...c6 8.Bg2=) 8.Nb5 0–0 9.Bh3 Ng6 10.Nd6 cd6 11.0–0 Nf6 12.c4 Ba6 (12...dc4!? 13.dc4 Qc7=) 13.cd5+– Nd5 14.Rc1 Nde7 (14...h6 15.Qa4 Bb7 16.e4+=) 15.Qa4 Bc8 16.Bc8 Rc8 17.Qa7 Nf5 (17...b5 18.Kg2+–) 18.h4 d5 Black prepares the advance d4 (18...h5 19.Ng5+–) 19.Rc8 (worse 19.Ne5 Ne5 20.Be5 Ra8+–) 19...Qc8 20.Rc1 (20.Ne5?! Qc2 21.Ng6 hg6+=) 20...Qd8 (better 20...Qe6 21.Ng5 Qd6+–) 21.Rc7 d4 22.Qb6 Re8 (22...Qd5 23.Qc5 Qc5 24.Rc5+– (24.bc5?! Rb8+–)) 23.b5 Re6 (23...f6 24.Qa7+–) 24.Qc5 Re8 (24...Qd6 25.a4 Qc5 26.Rc5+–) 25.b6 Qd6 (25...Nf8 26.Ng5 Qd6 27.Qc4+–) 26.Bd4! Qc5 (26...ed4 27.Qf5 Pinning (27.Qf5 Deflection); 26...Nd4 27.Qd6 Deflection (27.Qd6 Overloading)) 27.Bc5 Nge7 28.b7 (28.b7 h6 29.Be7 Ne7 30.Re7 Re7 31.b8Q Kh7 32.Qf8+–) 1–0. Pierre – Lepean, internet, 2019.

3.d3 d6

4.Nd2 Nd7 5.Ngf3 e5 6.g3 g6 7.c4 Bg7 8.Qc2 Ngf6 9.Bg2 0–0 10.0–0 a5 11.ba5 Ra5 12.e4 Nc5 13.a4 Bc6 14.Bc3 Ra7 15.Ra3 Ra4 16.Rfa1 Ra3 17.Ra3 Qd7 18.Ne1 Ra8 19.Ra8 Ba8 20.d4 ed4 21.Bd4 Ne6 22.Bb2 Nc5 23.h3 Qe6 24.f3 Nh5 25.Kh2 Bb2 26.Qb2 f5 27.Qd4 f4 28.g4 Ng3 29.Qc3 Bc6 30.Qa3 h5 31.Qc1 hg4 32.hg4 g5 33.Nb3 Qh6 34.Kg1 Ne2 35.Kf2 Nc1 36.Nc1 Qh4 37.Ke2 Na4 38.Ncd3 Nc3 39.Kd2 Nb1 40.Kc1 Nc3 41.Kc2 Ne2 42.Kd2 Ng1 43.Kc3 1–0. sagonek – letargi, kurnik, 2012.

4.Nd2 e5 5.Ngf3 Ne7 6.g3 Ng6 7.Bg2 Nc6 8.a3 h5 9.0–0 h4 10.e3 hg3 11.fg3 Qe7 12.Qe2 0–0–0 13.c4 f5 14.e4 f4 15.Rf2 fg3 16.hg3 Kb8 17.Kf1 Qd7 18.Ke1 Be7 19.Kd1 Bf6 20.Kc2 Rdf8 21.Rff1 Nge7 22.Rh1 Ng6 23.Rh8 Rh8 24.Rh1 Rh1 25.Bh1 Qh3 26.Qg2 Qg4 27.Nf1 Bg5 28.N1h2 Qh5 29.Qf2 Qh6 30.Ng5 Qg5 31.Nf3 Qh5 32.Qg2 a6 33.Kb3 Ka7 34.d4? ed4 35.Nd4? Nd4–+ 36.Bd4 Qd1 37.Kc3 Qa1 38.Kd3 Qa3 39.Bc3?! Ne5 40.Kd4 Qb3 41.Qb2 Nc6 42.Ke3 Qc4 43.Bf3 Ne5! 44.Be2?? Qc6 45.b5? Qe4 46.Kf2 Qg2 47.Ke3 Qe4 48.Kd2?? Nc4 49.Bc4 Qc4 50.ba6 Ba6 51.Bg7 Qe2 52.Kc1 Qb2 53.Kb2 Be2 54.Kc3 c5 55.g4 (55.g4 Bg4 56.Kd2–+). sagonek – janusz50, kurnik, 2011.

4.Nd2 e6 5.Ngf3 Nf6 6.e4 g6 7.g3 Bg7 8.Bg2 0–0 9.c4 c5 10.bc5 dc5 11.Qc2 Na6 12.a3 Nc7 13.0–0 Qd7 14.Rad1 Qe7 15.Rfe1 Rad8 16.d4 cd4 17.Nd4 Na6 18.N2b3 Nc5 19.Nc5 Qc5 20.Nb5?? Ne8?? 21.Bg7 Kg7?? 22.Rd8+– a6 23.Nd4 Nd6 24.Rf8 Kf8 25.Rc1 Qa3?? 26.c5 Qc5 27.Qc5 bc5 28.Rc5 Be4 29.Nb3 Bd3 30.Bf1 Bf1 31.Kf1 a5 32.Na5 Kg7 33.Rc6 Nf5 34.Nc4 Kf6 35.f4 Nd4 36.Rc7 Nf3 37.Kg2 Ne1 38.Kh1 Nd3 39.Ne5! Nb4 40.Rb7 Nd5 41.Rf7 1–0. sagonek – roszadov, kurnik, 2012.

4.e4 e5 5.a4 Nd7 (5...d5 6.b5=+) 6.b5 Ne7 (6...Ngf6 7.Nc3=+) 7.Nd2 g6 8.Ngf3 h6 (8...Bg7 9.a5=) 9.a5 Bg7 10.a6 Bc8 11.c3 0–0 12.Be2 Re8 13.0–0 Nf8 (13...d5 14.Qc2=) 14.d4 f5? (better 14...Ne6+=) 15.de5+– fe4 (15...Be6 16.ed6 cd6 17.Bd3+–) 16.Ne4 Nf5 17.Nf6! Bf6 18.ef6 Qf6 19.Qd2 g5 20.c4 Qe6? (better 20...Qf7+–) 21.Rae1 Ng6?? (21...Qf7 22.Nd4 Re2 23.Re2 Ng6+–) 22.Ng5! hg5 23.Bf3 Ne5 (23...Qf7 24.Re8 Qe8 25.Re1+–) 24.Bd5 Nc4 (24...Qd5 25.cd5 Kf7+–) 25.Qg5 Kf7 (25...Kh7 26.Be6 Be6 27.Re6 Re6 28.Qf5 Kg8 29.Qe6 Kf8 30.Qf6 Ke8 31.Re1 Ne5 32.Be5 Kd7 33.Qf7 Kd8 34.Bd6 cd6 35.Re8) 26.Qf5 (26.Qf5 Ke7 27.Qf6 Kd7 28.Bc6) 1–0. Pereira – Carsacu, internet, 2020.

3.d3 e6

4.a3 a5 5.ba5 Ra5 6.e4 d5 7.ed5 ed5=.

4.a3 c5 5.b5 a6 6.a4 (6.ba6 Ra6 7.e4 d5=) 6...ab5 (6...d5 7.Nf3+= Nf6+= –0.38) 7.ab5 Ra5 (7...Ra1 8.Ba1 d5 9.Nf3=) 8.c4 (8.Ra5 ba5 9.Nd2 d5=) 8...d5 (8...Ra1 9.Ba1 d5=) 9.e4 (9.Ra5!? ba5 10.Qa4=) 9...de4 (9...Ra1 10.Ba1 de4 11.de4 Qd1 12.Kd1 Be4 13.Nd2+=) 10.de4 (10.Ra5 ba5 11.de4 Be4=) 10...Qd1–/+ 11.Kd1 Be4 (11...Ra1 12.Ba1 Be4 13.Nd2+=) 12.Ra5 ba5 13.Nc3 (13.Nd2 Ba8=) 13...Bb7 (13...Bf5 14.Kd2+=) 14.Kd2 (14.Na4 Nf6+=) 14...Nf6 15.Bd3?? (better is 15.f3+=) 15...Bg2–+ 16.Be4 (16.Ne4 Bh1 17.Nf6 gf6 18.Bf6–+) 16...Bh1 17.Bh1 Ng4 18.Kc2 Be7 19.Bc6 Nc6 20.bc6 Bd6 21.Ne4 0–1. Pierred – steve_perry_fan, internet, 2008.

4.a3 c5 5.bc5 bc5 6.e4 d5= 7.Nd2 Nc6=.

4.a3 d5 5.Nf3 Nf6 6.e3 Bd6 7.Nc3 a5=.

4.a3 Nf6 5.Nd2 d6 6.e4 Nbd7 7.c4 Be7 8.Ngf3 a5 9.Be2 ab4 10.ab4 Ra1 11.Qa1 Qa8 12.0–0 0–0 13.Nb3 Qa1 14.Ra1 Ra8 15.Nbd4 Ra1 16.Ba1 c5 17.bc5 bc5 18.Nb5 Bc6 19.Na3 Ba4 20.Kf1 d5 21.cd5 ed5 22.ed5 Nd5 23.Ne5 Ne5 24.Be5 Nb4 25.Ke1 Nc6 26.Bc3 c4?? 27.Nc4+/– f6 28.h3 Kf7 29.Bf3 Nd8 30.Kd2 g6 31.d4 h5 32.Ne3 Bc6 33.d5 Bd7 34.Nc4 Nb7 35.Bd4 Nd6 36.Nd6 Bd6 37.Be4 f5 38.Bf3 Bb5 39.Kc3 Ke7 40.g4 hg4 41.hg4 Bf1 42.gf5 gf5 43.Kb3 Kf7 44.Ka4 Kg6 45.Ka5 Kg5 46.Be3 f4 47.Bd4 Kf5 48.Kb6 Be5 49.Be5 Ke5 50.Kc7 Bh3 51.d6 Kd4 52.Bc6 White intends d7 52...Kd3 53.d7 Bd7 54.Kd7 Ke2 55.f3 Ke3 56.Ke6 (56.Ke6+–) 1–0. tyop (1700) – cot, kurnik, 2012.

4.a3 Nf6 5.e4= a5 6.b5 d5 7.e5 Nfd7=.

4.c4 Bb4!? 5.Nd2 Nf6–/+.

4.c4 d5 5.a3 dc4 6.dc4 Qd1 7.Kd1 Nd7 8.e3 0–0–0 9.Nd2 Ndf6 10.Ke1 Nh6 11.Ndf3 Ne4 12.Ne2 (12.Nh3 c5 13.b5 Ng4=) 12...f6 (12...Ng4 13.Rg1 Nef2 14.Nc3–/+) 13.Ned4 (13.Nc3 c5 14.Ne4 Be4=) 13...Re8 (13...Ng4!? 14.Ne6 Re8 15.Nf8 Nef2–+) 14.Bd3 Ng4 15.Be4 Be4 16.Ke2 e5 17.Nb5 Kb7 18.h3 Bf3 (18...Nh6 19.Rhd1=) 19.gf3 Nh6 20.Rhd1 Be7? (better is 20...a6!? 21.Nc3 Nf5=) 21.Rd7+/– Nf5? (better is 21...Bd8+/–) 22.Rc7+– Kb8 23.Ra7 Nd6 24.Rd7 Nc4 25.Bc3 g5 26.Kd3 Rd8 27.Rd8 Rd8 28.Kc4 Rc8 29.Kb3 Kb7 30.Rd1 Ka6 31.a4 Rc6 32.Rd7 Bf8 33.Ra7# 1–0. lican – chebun, kurnik, 2012.

4.Qd2 Nf6 5.c4 (5.e4 Be7=) 5...Nc6 (5...a5 6.b5+=) 6.b5 (6.a3 a5 7.b5 Na7=) 6...Bb4 7.Bc3 Bc3 (7...Bc3 8.Qc3 Ne7+=). macahan – garrison, net–chess.com, 2003.

4.Nd2 Bb4? 5.Bg7 Qg5 6.Bh8 Bg2 7.c3 Bh1 8.Ngf3+– (8.cb4?! Qg1 9.d4 Qh2=).

4.Nd2 f6 5.a3 c6 6.e4 Bd6 7.Ngf3 Bc7 8.Nh4 Qe7 9.Qh5 Qf7 10.Qe2 (10.Qf7 Kf7 11.d4 a5+=) 10...d6 11.Nhf3 Nd7 12.g3 0–0–0 13.Bg2 g5 (13...Ne7 14.0–0+=) 14.Nd4 (14.Ng5!? fg5 15.Bh8+–) 14...h5 15.N2b3 (15.b5 c5 16.N4b3 d5+=) 15...h4 16.g4 h3 17.Bf3 Re8 18.Qd2 (better 18.c4=) 18...f5?? (18...Ne5 19.Be2=+) 19.ef5 (19.Nc6 Rh6 20.Na7 Kb8 21.Nb5 fe4 22.Qc3+– (22.Nc7?! Qf3 23.Ne8 Qh1 24.Ke2 Qf3 25.Ke1 Qh1 26.Ke2 Qf3 27.Ke1 Qh1 28.Ke2=)) 19...ef5= 20.Kd1 (20.Ne2!? fg4 21.Bg4=) 20...fg4–/+ 21.Bg4 Ngf6 22.Bf3 g4 23.Bc6 (better 23.b5 c5 24.Bb7 Kb7 25.Ne2–/+) 23...Ne5?? (better 23...Bc6 24.Nc6 Qd5 25.Na7 Kb7–+) 24.Bb7 (better 24.Be8!? Re8 25.Re1+–) 24...Kb7= 25.Nb5?? (25.Re1 d5=) 25...a6?? (better 25...Qd5 26.Re1 Qb5–+) 26.Be5 de5 27.Nc3? (27.Nc7 Qc7 28.Qe2 e4=+) 27...Qd7?? (better 27...Ne4! 28.Ne4 Qf3 29.Qe2 Qh1 30.Kd2 Qh2 31.Qg4 Qf4 32.Qf4 ef4–/+) 28.Re1 (28.b5 ab5 29.Qe3 Rhf8=) 28...Qc6 Black prepares the advance e4 (28...e4 29.Ne4 Ne4 30.de4 Qd2 31.Kd2 Bh2 32.c3–/+) 29.Kc1 (29.Ne4!?+=) 29...Rd8 (29...Qg2 30.b5 Qh2 31.ba6 Ka6 32.Qe2–/+) 30.Kb2 (30.Ne4 Rhf8=+) 30...Rhe8 (30...e4 31.Ne4 Ne4 32.Re4 Qe4 33.de4 Rd2 34.Nd2 Bh2 35.c3–/+) 31.Rad1 (better 31.Ne4!?=) 31...e4–/+ 32.d4 (better 32.Rh1–/+) 32...Nd5 (better 32...Bh2 33.Qe3 Rc8–+) 33.Nd5= Qd5 34.Qe3 (34.Qe2 Qf5 (worse 34...Bh2 35.Qg4 Rh8 36.Re4+–) 35.Rh1 Re7=) 34...Rg8 (34...Bh2 35.Qe2 Qg5 36.c3=+) 35.c4 Qc4 36.Rc1 (better 36.Qe4!? Kb8 37.Rc1=+) 36...Qd5–/+ 37.Red1 (better 37.Qe4!? Qe4 38.Re4 Bh2 39.Nd2–/+) 37...Rgf8–+ 38.Nd2? (38.Rc3 Bh2 39.Qe2 Rf3–+) 38...Bf4 (better 38...Qd4 39.Qd4 Rd4 40.Ne4 Re4 41.Rd7–+) 39.Qc3 (39.Qe4 Qe4 40.Ne4 Bc1 41.Kc1–+) 39...Bd2 (better 39...Rc8 40.Nc4 Bc1 41.Rc1 Rf2 42.Kb1 Ka7–+) 40.Qd2 1–0. alessandrocarvalhaes (1780) – brainlaw (1795), lichess.org, 2020.

4.Nd2 Nf6=.

4.e3 d5 5.Nf3 Nf6 6.b5 Nbd7 7.Be2 Nc5 8.0–0 Qd6 9.a4 c6 10.c4 dc4 11.dc4 Qd1 12.Rd1 cb5 13.cb5 Bf3 14.Bf3 Rd8 15.Rd8 Kd8 16.Bf6 gf6 17.Nc3 f5 18.Rd1 Kc7 19.Bc6 Bg7 20.Ne2 Rd8 21.Rd8 Kd8 22.Nf4 Kc7 23.Nh5 Bc3 24.Nf4 Na4 25.g3 Nc5 26.Ne2 Bb4 27.Nd4 a6 28.ba6 Na6 29.Be8 Bc5 30.Bf7 Bd4 31.ed4 Kd6 32.Bg8 h6 33.Kg2 Nc7 34.Kf3 b5 35.Ke3 b4 36.Kd2 Kd5 37.Kd3 Nb5 38.Bf7 b3 39.h3 b2 40.Kc2 Nd4 41.Kb2 Ne2 42.Bh5 Ng1 43.h4 Nh3 44.f3 e5 45.Bg6 f4 46.g4 Ng1 47.g5 hg5 48.hg5 Nf3 49.Bd3 Ng5 50.Kc2 e4 51.Be2 f3 52.Bf1 e3 53.Kd3 e2 54.Be2 f2 55.Ke3 Nh3 56.Kf3 Kd4 0–1. cziterikamper – orangutanik12, kurnik, 2012.

4.e4 Bb4 5.c3 Bf8 6.Nf3 =+.

4.e4 Bb4 5.Nd2 Nf6 6.Ngf3 0–0 7.Be2 Bd2 (7...Na6 8.a3 Be7 9.0–0–/+) 8.Qd2=+ d6 9.0–0 (9.Qg5 e5–/+) 9...Nbd7 (9...Nc6 10.c4=+) 10.Nd4 (10.Rab1 e5–/+) 10...c5 11.Nb5 Ne5 (11...Ne8 12.Qf4–/+) 12.f4 (12.Qf4 Ne8 13.Be5 de5 14.Qe5 a6=) 12...Ng6=+ 13.Nd6 (better is 13.f5!? ef5 14.Rf5=+) 13...Qd6–+ 14.e5 Qc6 15.Bf3 Nd5 16.c4 Nh4 (16...Ngf4 17.cd5 Nd5 18.Be4–+) 17.cd5 ed5 18.Rac1 Nf3–+ 19.Rf3 d4 20.Rg3 Rfd8 21.f5–/+ Kh8 22.Qg5=+ Rg8 23.Bd4+= Qd5? 24.Bc3 Rae8?? 25.e6!+– f6 26.Bf6! (26...Qg2 27.Rg2 Bg2 28.Be5+– (28.Qg2?! gf6 29.Rc4 Rg2 30.Kg2 Rd8+/–; 28.Kg2?! gf6 29.Qg8 Rg8 30.Kf3 Rd8+/–)) 1–0. RageofKlugman – yulio, ChessWorld.net, 2006.

4.e4 Bb4 5.Nd2 Nf6 6.Ngf3 d6 7.Be2 Qd7 8.0–0 Nc6 9.Nc4 b5 10.Ncd2 d5 11.Bf6 gf6 12.e5? (12.a3 Bd2 13.Nd2 d4=+) 12...f5 (better 12...fe5 13.Rb1 Qd6–+) 13.d4=+ Rg8 (better 13...Bc3!? 14.Rb1 Nd4 15.Nd4 Bd4=+) 14.Bb5+= a6 15.Ba4 0–0–0 (15...a5 16.a3 Be7 17.Nb3+–) 16.a3 Bc3 17.Rb1 Qe7 18.Bc6 (18.Rb3!? Ba5 19.Qe2+–) 18...Bc6+– 19.Nb3 (better 19.Rb3 Ba5 20.Qe2+=) 19...Kd7?? (better 19...Qa3 20.Qd3 Bb4=) 20.Nc5 (better 20.Qd3 Bb4 21.ab4+–) 20...Ke8 21.Qc1?? (better 21.Na6 Ba5 22.Qd3+–) 21...f6?? (21...Bb5!?=) 22.a4?? (better 22.Qe3 Ba5 23.ef6 Qf6 24.Ne6+–) 22...fe5+= 23.Qa3?? (better 23.Ne5!? Bd4 24.Nc6+–) 23...Bd4 (better 23...ed4 24.Rfe1 Be1 25.Re1 Bd7–+) 24.Nb7?? (better 24.Nd4 ed4 25.f4=+) 24...Qa3–+ 25.Nd8 (25.Rb3 Qb3! 26.cb3 Bb7–+) 25...Kd8 (better 25...Qf3! 26.g3 f4 27.Rb8 fg3 28.Nb7 Ke7 29.Re8 Be8 30.h3 gf2 31.Kh2 Qg2) 26.Nd4 (26.Rb8 Kd7 27.Rg8 Bc3–+) 26...ed4 (26...Kd7 27.Nc6 Kc6 28.Ra1–+) 27.Rb8 Kd7 28.Rg8 Bb5! 29.Rg7 (29.ab5 Qb2 Double attack (29...Qb2 Decoy)) 29...Kd6 30.Re1 (30.ab5 ab5 31.Rh7–+) 30...Ba4 31.Rh7 Qc3 32.Rb1 (32.Rf1 Bb5 33.g3 Bf1 34.Kf1 Qc2–+) 32...Bc2 33.Rc1 Qd2 (better 33...d3!? 34.Rf1–+) 34.Rf1 (34.Ra1 Qe2 35.Rh3 Bd1–+) 34...Bd3 35.Ra1 Qb2 36.Re1 1–0. alessandrocarvalhaes (1660) – spoilt88 (1720), lichess.org, 2019.

4.e4 d5 5.f3? Nc6 (better 5...Bb4!? 6.Nd2 d4–/+) 6.a3 (6.b5 Nce7=) 6...Qd7 (6...a6 7.Nh3=) 7.Nd2 0–0–0 8.Be2 (8.b5 Nb8 9.d4 de4 10.fe4 f5=) 8...de4 (8...Nge7 9.Nh3=) 9.fe4 Nf6 10.Ngf3 (better 10.Nh3=) 10...Bd6?? (10...Ng4 11.Nc4=) 11.0–0 (better 11.b5!? Nb8 12.e5 Qb5 13.Rb1 Bf3 14.Nf3 (14.ed6?! Be2 15.Qe2 Qc5=) 14...Qa5 15.Qd2 Qd2 16.Kd2 Ba3 17.Ba3 (17.ef6?! Bb2 18.Rb2 gf6+=) 17...Ne4 18.Ke1+–) 11...e5 (11...Bf4 12.Nc4=) 12.c4 (better 12.Nc4+=) 12...Nd4?? (better 12...Ng4 13.Qb3 Ne3=) 13.Nd4+– ed4 14.Nf3 (better 14.Rf6 Kb8 15.Rf2+–) 14...Qg4?? (better 14...Ng4=) 15.Nd4 Qg6 (better 15...Qg5 16.Nf5 Be4 17.de4 Bh2 18.Kh2 Rd1 19.Rad1 Kb8+–) 16.Nf3 (better 16.Nf5+–) 16...Be7?? (better 16...Ne4 17.Qc1 Bh2 18.Nh2 Ng3+–) 17.Qa4 (better 17.Ne5 Qg5 18.Nf7 Qe3 19.Kh1+–) 17...Kb8 18.c5! Ng4 (18...bc5 19.Ne5 Combination) 19.Rac1 (19.Ne5 Ne5 20.Be5 bc5+–) 19...Ne3 (19...Qh6!? 20.cb6 cb6+–) 20.Rfe1 0–1. alessandrocarvalhaes (1925) – ljtuanian22 (1915), lichess.org, 2020.

4.e4 Nf6 5.a3 Be7 (5...d5 6.e5 Nfd7 7.d4=) 6.Ne2 0–0 7.g3 (7.e5 Ng4 8.Nf4 Nh6=) 7...c5 8.b5 (8.bc5 Bc5 9.Bg2 e5=+) 8...a6 9.c4 ab5 10.cb5 d5 11.Bg2 (11.e5 Ng4 12.d4 cd4 13.Bd4 Nd7=+) 11...de4 (11...Qd7 12.Qb3–/+) 12.de4 (better is 12.Nbc3!?–/+) 12...Qd1–+ 13.Kd1 Be4 (13...Ng4 14.Ke1–/+) 14.Be4 Ne4 15.Rf1 Rd8 16.Kc2 Bf6 17.Bf6 Nf6 18.f3 Nbd7 19.Nd2 Ne5 20.Ra2 (20.Nc3 Nd5 21.Nd5 ed5–+) 20...Rd7 (20...Nd5 21.Rfa1–+) 21.Ne4? (21.Nc3 Rad8 22.Rd1 g5–+) 21...Ne4 (21...Nd5!? 22.Kb1–+) 22.fe4 Rad8 23.Kc3?? (23.Nc3–+) 23...Rd3 24.Kc2 Nc4 (better is 24...Rd2 25.Kb1 Ra2 26.Ka2 Rd2 27.Kb3 Re2–+) 25.a4 (25.Kc1–+) 25...Ne3 26.Kb1 Rb3 27.Ka1 (27.Rb2 Rb2 28.Kb2 Nf1–+) 27...Nf1 (28.Rc2 Nd2–+) 0–1. Slavisa2 – drasko2, Live Game Caissa's Web, 2004.

4.e4 Nf6 5.a3 Be7 6.e5 Ng8 7.d4 d5 (7...a5 8.b5=) 8.c3 c5 9.Nd2 cd4 (9...Nh6 10.Bd3=) 10.cd4+= g6 (10...Nh6 11.Rc1+=) 11.f4 Bf8 12.Ngf3 Bg7 13.Bd3 Ne7 14.g4 0–0 15.h4 a6 (15...Qd7 16.h5+=) 16.h5+– Nd7 (16...Qd7+–) 17.h6 (better 17.hg6!? hg6 18.Qe2+–) 17...Bh8+= 18.g5 (18.f5 Re8+=) 18...b5 19.Nb3 Rc8 20.Na5 (20.Nc5 Nc5 21.dc5 Nf5+=) 20...Qb6 21.Rc1 Nc6 22.Nb3 Rc7 23.Qe2 Rfc8 24.0–0 Kf8 25.Nh4 (25.Nc5 Kg8+=) 25...Ke7 (25...Kg8 26.Nc5=) 26.Nf3 (26.Nc5 Kf8+=) 26...Na7 (26...Kf8 27.Nc5+=) 27.Na5 Rc1 28.Bc1 Ba8 29.Bd2 Nc6 30.Nb3 a5? (30...Kf8 31.Ra1+–) 31.Rc1 (31.ba5 Qb7+–) 31...ab4 (31...a4 32.Nc5 Na7 33.Nd7 Rc1 34.Bc1 Kd7 35.Qc2+–) 32.ab4 (32.Bb4 Kd8 33.Bb5 Nb4 34.Rc8 Kc8 35.ab4 Bc6 36.Bc6 Qc6+–) 32...Na7 (32...Kf8 33.Bb5 Kg8 34.Nc5+–) 33.Rc8 Nc8 34.Bb5 Bc6 35.Bc6 Qc6 36.b5 Qb6 37.Ba5 Qb7 38.Ne1 (38.Nc5 Qa7 39.Bb4 Kd8+–) 38...Ncb6? (38...Na7 39.b6 Nc6 40.Qb5 Na5 41.Nc5+–) 39.Nd3 (better 39.Bb4!? Ke8 40.Na5+–) 39...Nc4+– 40.Ndc5 (40.Bb4!? Ke8 41.Qa2 Qb5 42.Qa8 Qb8 43.Qc6+–) 40...Qb5= 41.Bc3 Nc5 42.Nc5 Qb1 43.Kf2 Qf5 (better 43...Qc1!? 44.Qf3 Kf8=+) 44.Kg3+– f6? (better 44...Qb1+–) 45.Bb4?? (better 45.ef6 Kf7 46.Bb4 Bf6 47.gf6 Qf6 48.Ne4 de4 49.Qc4+–) 45...Kd8?? (45...fe5 46.Nd3 Kd7 47.de5 Ke8+=) 46.gf6 (46.Qa2 Nb6 47.Qa7 Ke8 48.Qb8 Kf7 49.Ne4 Qg4 50.Kg4 f5 51.Kh4 Nc8 52.Qc7 Ke8 53.Qc8 Kf7 54.Qf8) 46...Bf6 (46...Ke8 47.Qa2 g5 48.Ne6 Nb6 49.Ng5 Bf6 50.ef6 Qf6+–) 47.Qg4 (better 47.ef6 e5 48.fe5+–) 47...Qg4+– 48.Kg4 Be7 49.Ne6 Kd7 50.Nc5 Kc6 51.f5 (51.Na6 Bd8 52.Bf8 Ba5+–) 51...gf5 (better 51...Ne3!? 52.Kf4 Nf5=) 52.Kf5+– Bc5?? (52...Kb5 53.Ke6 Ne5 54.de5 Bc5 55.Bc5 Kc5+–) 53.Bc5+– (53.dc5?! Kb5 54.c6 Kc6+–) 53...Ne3 54.Kf6 Nc4 (54...Ng4 55.Kg7 Kd7+–) 55.e6 Na5 56.e7 (56.e7 Kb5 57.e8Q Kc4 58.Qa4 Kd3 59.Qa5 Ke3 60.Qc3 Ke2 61.Qc2 Kf3 62.Qd3 Kf2 63.Qh7 Kg2 64.Qc2 Kf3 65.Qd2 Kg3 66.Qe3 Kg2 67.h7 Kf1 68.h8Q Kg2 69.Qhh3) 1–0. alessandrocarvalhaes (1845) – w300 (1825), lichess.org, 2020.

4.e4 Qg5 5.a3 Qh6 6.Nd2 Be7 7.Ngf3 Bf6 8.Bf6 Qf6 9.Be2 g5 10.e5 Qg7 11.d4 (11.h3 h5 12.Ne4 g4=) 11...h5?? (11...g4 12.0–0 gf3 13.Bf3–/+) 12.Qb1?? (better 12.0–0+=) 12...g4–+ 13.Nh4 (13.Qd1 Nc6–/+) 13...Qg5 14.g3?? (better 14.Nhf3 gf3 15.Nf3 Qg2 16.Rg1–+) 14...Bh1 15.Ne4 (15.Qb3–+) 15...Be4 16.Qb3 Nc6 17.b5 (17.Rd1–+) 17...Nd4 18.Qc4 Nc2 19.Kf1 Na1 20.Qc7 Nb3 (better 20...Nc2 21.Qd6 Bd5 22.f4 gf3 23.Nf3 Qc1 24.Kf2–+) 21.f3 Qc1 (21...Qe3 22.Qd6 gf3 23.Nf3 Bf3 24.Qd3 Be2 25.Qe2 Nd2 26.Ke1 Nf3 27.Kd1 Qd4 28.Kc2 Rc8 29.Kb3 Nd2 30.Qd2 Qd2 31.h3 Rc3 32.Ka4 Qd4) 22.Kf2 gf3 (22...Qc7 23.fe4 Qc5 24.Kg2 Qc2 25.Kf2 Nd4 26.Kg2 Qe2 27.Kg1 Rc8 28.Nf3 Nf3 29.Kh1 Qh2) 23.Nf3 Nd4 (better 23...Qc7 24.Bd1 Qc5 25.Kg2–+) 24.Nd4 (24.Qc1 Ne2 25.Ke2–+) 24...Qc7 25.Bf3 0–1. alessandrocarvalhaes (1850) – konjnj (1860), lichess.org, 2020.

3.d3 f6

4.Nd2 e5 5.Ngf3 d5 6.a3 c6 7.e3 Nd7 8.c4 g5 9.Nb3 Bd6 10.cd5 cd5 11.g3 h5 12.Bg2 Ne7 13.0–0 Ng6 Black prepares the advance h4 14.e4 de4 15.de4 Ndf8 16.Re1 h4 17.h3 hg3 18.fg3 Bc8 19.Qd5 Bh3 20.Rad1 Ke7 21.Qb7 Nd7 22.Rd2 Bg2 23.Kg2 g4 24.Nh4 Nh4 25.gh4 Rh4 26.Red1?? Qh8–+ 27.Kf2 Rh2 28.Ke3 Qh3# 0–1. sagonek – kestasl, kurnik, 2012.

4.Nd2 g6 5.e4 d6 6.Ngf3 Bg7 7.Be2 Nc6 8.b5 Nb8 9.0–0 Nd7 10.a4 Nh6 11.a5 0–0 12.ab6 ab6 13.Ra8 Ba8 14.c4 f5 15.Bg7 Kg7 16.Qa1 Kg8 17.e5 Bf3 18.Bf3 Ne5 19.Be2 f4 20.d4 Neg4 21.Qa2 Rf7 22.Nb3 e6 23.c5 bc5 24.dc5 dc5 25.Nc5 Qd6 26.Ne6 f3 27.Bf3 Qh2 0–1. arti000 – mehmet22, kurnik, 2012.

4.Nd2 g6 5.Ngf3 Bg7 6.c4 Nh6 7.Qc2 Nf5 8.g3 0–0 9.Bg2 Bf3 10.Nf3 (10.ef3?! Nc6 11.b5 Ncd4=) 10...c6 11.0–0 Qc7 12.e4 Nd6 13.d4 f5 14.ef5 Nf5 15.Ne5 (15.Rfe1 Qd6+=) 15...Be5 (better is 15...Nd4 16.Bd4 Be5 17.Be5 Qe5+=) 16.de5+/– Na6 17.a3 c5?? (better is 17...Rad8+/–) 18.b5 Nd4 19.Bd4 cd4 20.Ba8 (20.ba6?! Rad8+–) 20...Nc5 21.Be4 Qe5 22.f3 (22.Rfe1 Qf6+–) 22...Rf6 (22...d3 23.Qg2+–) 23.Rae1 Rd6 Black intends d3 (23...d3 24.Qd2 Qd4 25.Re3 Rd6+–) 24.Bd5 Qd5 (24...Rd5 25.cd5 Qf6+–) 25.cd5 Rd5 26.Re7 d3 27.Qc4 d2 (27...Kf8 28.Qh4 Rh5 29.Qf6 Kg8 30.Qg7) 28.Qd5 (28.Qd5 Ne6 29.Qa8 Nf8 30.Qe8 d1Q 31.Qf7 Kh8 32.Qf8) 1–0. sagonek – prymek2000, kurnik, 2011.

4.e4 e6 5.Nf3 d6 6.Be2 g6 7.c4 Bg7 8.0–0 Qe7 9.d4 d5 10.c5 bc5 11.bc5 de4 12.Nfd2 f5 13.Nc4 Qg5 14.f3 ef3 15.Bf3 Bf3 16.Qf3 c6 17.Nd6 Ke7 18.Qb3 Na6 19.Qb7 Kd8 20.Qa8 Ke7 21.Qb7 Kd8 22.Nf7 Ke8 23.Ng5 1–0. arti000 – agacza26, kurnik, 2012.

3.d3 Nf6

4.c4 e5 5.a3 =+.

4.c4 e6 5.b5 (5.a3 a5 6.b5 d5 7.cd5 Qd5=) 5...Bb4–/+ 6.Nd2 0–0 (6...a6 7.Ngf3–/+) 7.a3 Be7 (7...Ba5 8.e3–/+) 8.e4 (8.Ngf3 d5=+) 8...d6 (8...a6 9.Be2=+) 9.Ngf3 (9.Be2 a6=+) 9...e5 (9...a6 10.Be2=+) 10.g3 (10.d4 a6 (< 10...Be4 11.Ne4 Ne4 12.Bd3+/–) 11.Bd3 Nh5=) 10...c5 (10...a6!?=+) 11.Bh3= Bc8 (11...a6 12.a4=) 12.Bg2 (12.Bc8 Qc8 13.Nh4 Qh3+=) 12...Bg4 (12...Qc7 13.0–0=) 13.h3+= Be6 (13...Bh5 14.0–0 Ne8 15.Qb3+=) 14.0–0 Qd7 (14...a6 15.a4+=) 15.Kh2 (15.Ng5 Qc7+/–) 15...h5 (15...Ne8 16.Ne1+/–) 16.Ng5 (better is 16.Nh4+/–) 16...g6? (better is 16...h4 17.gh4 a6+=) 17.f4+– ef4? (17...Ne8 18.Ndf3 h4+–) 18.gf4 Nh7 19.Ne6 Qe6 20.f5 gf5 21.ef5 Qh6 22.Ba8 Nd7 23.Rg1 Ng5 24.Bc6 Ne5 25.Be5 de5 26.h4 f6 27.hg5 fg5 28.Qf3 g4 29.Ne4 Kh8 30.Qf2 Qh7 31.Raf1 Rg8 32.f6 Bf8 33.Bd5 Rg6 34.Qf5 h4 35.Rg4 Rg4 36.Qg4 Bh6 37.f7 Bf4 38.Rf4 ef4 39.f8Q Qg8 40.Qgg8# (40.Qfg8#) 1–0. Fredek (2090) – Guest795357, Freundschaftspartie, 5m + 0s, 2005.

4.e4 d5 5.e5 Nfd7 6.d4 e6 7.c3 Be7 8.Nf3 c5 9.Bb5 cb4 10.cb4 Bb4 11.Bc3 a5 12.0–0 0–0 13.a3 Be7 14.a4 Nc6 15.Qc1 Ndb8 16.Qd1 Na6 17.Nbd2 Bb4 18.Nb1 Rc8 19.Qd3 Nab8 20.Bb4 Nb4 21.Qd2 h6 22.Nc3 N8a6 23.Rac1 Qe7 24.g3 Rc7 25.Rfe1 Rfc8 26.Re3 Nb8 27.Kg2 Nd7 28.Ne2 Rc1 29.Nc1 Rc2 30.Qd1 Nf8 31.Ne1 Rc7 32.Nb3 Ng6 33.Qe2 Qg5 34.Nf3? Nf4–+ 35.Kf1 Ne2 36.Ng5 Nc1 37.Nf3 Nb3 38.Rb3 Rc1 39.Kg2 Bc6 40.Ng1 Bb5 41.ab5 Rc4 42.Nf3 a4 43.Ra3 Nc2 44.Rd3 a3 45.h4 0–1. Znak,Nicholas – Bester,Kazimierz, RN–2008–0–00113, 2008.

4.e4 d6 5.c4 e5 6.Nc3 Be7 7.Nf3 0–0 8.Be2 a5 9.a3 (9.b5 Nbd7=) 9...ab4 10.ab4 Ra1 11.Qa1 Nc6 12.b5 Na5 13.0–0 Nb3 14.Qa2 (14.Qd1 Nc5+=) 14...Nc5= 15.Ra1 h6 (15...Nh5 16.d4 Ne4 17.Ne4 Be4 18.de5=) 16.Na4 (16.Nd5 Qd7+=) 16...Nfd7= 17.Nd2 f5 18.ef5 Rf5 19.Qb1 Qf8 20.f3 (20.Nc5 Nc5 (< 20...dc5 21.Qe1+/–) 21.Bf3 Bf3 22.Nf3 Bf6=) 20...Bg5=+ 21.Nf1 (21.Nc5 Be3 22.Kh1 Nc5=+ (< 22...Bc5 23.Ra7 Qb8 24.d4+=)) 21...Nb3 22.Ra3 Nd4 23.Qd1 Qf6 (23...Bf4 24.h4=+) 24.Nc3 (24.Ng3 Be3 (< 24...Ne2 25.Qe2 Rf4 26.Nh5+/–) 25.Kh1 Rg5+=) 24...Qg6 (24...Nc5 25.Ne4 Qd8 26.Bd4 ed4 27.Qa1=) 25.Ne4 Nf6 (better is 25...d5!? 26.Bd4 ed4+/–) 26.Ra7 (26.Bd4 ed4 27.Ra7 Be4 28.de4 Rc5+/–) 26...Be4 27.de4 Rf4 (27...Ne2 28.Qe2 Rf4+/–) 28.Bd4 ed4 29.Qd4 (29.g3 Bh4+–) 29...Nh5 (better is 29...Ne8!?+–) 30.Rc7 Bf6? (30...Rf8 31.Bd1 Rb8+–) 31.Qd5 (31.Qd6 Kh7+–) 31...Kh8 (31...Kh7 32.Qd6 Bc3 33.Qg6 Kg6+–) 32.Rc8 (32...Qe8 33.Re8 Kh7 34.Ng3 Ng3 35.hg3 Rg4 36.fg4 Be5 37.Rb8 h5 38.Qg8 Kh6 39.Qh8 Kg5 40.Qh5 Kf6 41.Rf8 Ke6 42.Qf7) 1–0. Fredek (2090) – Guest281299, Freundschaftspartie, 5m + 0s, 2005.

4.e4 d6 5.Nf3 e5 6.Be2 Be7 7.0–0 0–0 8.c4 (8.a3 c5=) 8...c5 (8...a5 9.b5=) 9.a3 (9.b5 a6=) 9...Nc6 10.bc5 bc5 (worse is 10...dc5 11.Ne5 Ne5 12.Be5+/–) 11.Nc3 a6 (11...Nd4 12.Nd5=) 12.Rb1 Rb8 13.Nd5 Nd5 14.cd5 Nd4 15.Nd4 cd4 16.Bc1 Bg5 (16...f5 17.f4=) 17.Qb3+= Bc1 18.Rfc1 Ba8 19.Qa4 Rb1 (19...Qc8 20.Bf1 Rb1 21.Rb1=) 20.Rb1 Qc8 (20...Qc7 21.Qa6 Qc2 22.Re1+=) 21.Qc4+/– Bb7 (21...Qd7!?+/–) 22.Qb4+– Qc2 23.Bd1 (23.Qb7?! Qe2 24.Qa6 f5 25.ef5 Rf5+=) 23...Qd3 24.Qb7 Qe4 25.Bf3 Qc2 26.Qb2 Qb2 (26...Qf5 27.Re1+–) 27.Rb2 Rc8 28.Kf1 f5 (28...Rc1 29.Bd1! Kf8 30.Ke1+–) 29.Bd1 d3 (29...Kf7 30.Rb7 Kf6 31.Rd7+–) 30.Rb6 Rd8 31.f3 Kf7 (31...a5 32.Kf2+–) 32.Kf2 e4 (32...Rc8 33.Rd6 Rc1 34.Ke1+–) 33.fe4 fe4 34.Rb4 Re8 (34...Rc8 35.Re4 Rc1 36.Ke1+–) 35.Ke3 Kf6 36.Re4 (36.Re4 Re5 37.Re5 Ke5 38.Bf3+–) 1–0. pierre – Nye123, internet, 2015.

4.e4 e5 5.a3 d6 6.Nd2 Be7 7.Ngf3 Nbd7 8.Be2 c5 9.c3 cb4 (9...d5 10.ed5 Nd5 11.0–0=+) 10.ab4 (10.cb4 0–0=) 10...a5 (10...d5 11.ed5 Nd5 12.b5=) 11.b5 (11.0–0 0–0=) 11...Nc5 (11...d5 12.ed5 Nd5 13.0–0=) 12.c4 0–0 (12...Nh5 13.g3=) 13.Qc2 (13.0–0 Qc7=) 13...Qd7 (13...Nh5 14.d4 ed4 15.Nd4=) 14.0–0 Qe6 (14...Rfc8 15.Ra3=) 15.Rfe1 (15.Ra2 h6=) 15...h6 (15...Rfc8 16.Bd1=) 16.Rac1 (16.d4 ed4 17.Nd4 Qd7+=) 16...Nh7 (16...Rfc8 17.Bd1=+) 17.Ba3 (17.d4 ed4 18.Nd4 Qg6+=) 17...Rfd8 (17...Ng5 18.Rcd1=) 18.Nb3 (18.d4 ed4 19.Nd4 Qg6=) 18...g5 (18...Ng5 19.Ra1=) 19.Nc5 (19.d4 Nb3 20.Qb3 Be4+=) 19...dc5= 20.Bb2 f5? (better 20...Bf6!?=) 21.Ne5+– (worse 21.Be5 fe4 22.Bg3 ef3 23.Bf3 Qd7=+) 21...fe4 (better 21...Nf6 22.Nc6! Bc6 23.ef5 Qf5 24.bc6 Bd6+–) 22.Ba1 (22.Bh5 ed3 23.Nd3 Be4 24.Nc5 Bc2 25.Ne6 Rd2+–) 22...ed3? (better 22...Bf6 23.Nc6 Bc6 24.bc6 Ba1 25.Ra1 Rd4+=) 23.Bd3+– Nf6 (23...Rd3 24.Nd3 Qf7 25.Ne5+–) 24.Ng6 (better 24.Bh7 Nh7 25.Nc6+–) 24...Qf7 (24...Ne4 25.Ne7 Qe7 26.Be4 Be4 27.Re4 Qh7+–) 25.Ne7 (25.Re7 Rd7 26.Rf7 Rf7+–) 25...Kg7 (25...Kh8 26.Ng6 Kg8 27.Re7+–) 26.Bg6 Qf8 27.Bh5 (better 27.Nf5 Kg8 28.Re7 Rd4 29.Rb7 Rad8+–) 27...Be4 (27...Rd4 28.Re6 Nh5 29.Rh6 Kf7 30.Qg6 Ke7 31.Bd4 Ng7 32.Bg7 Kd7 33.Qe6 Kd8 34.Rd1 Bd5 35.Qd5 Qd6 36.Qd6 Kc8 37.Rh8 Kb7 38.Qe7) 28.Re4 Rd4 29.Rd4 cd4 (29...Qf7 30.Bf7 Rb8 31.Qg6 Kf8 32.Qf6 cd4 33.Ng6) 30.Qg6 Kh8 31.Nf5 (31.Bd4 Qe7 32.Bf6 Qf6 33.Qf6 Kg8 34.Bf7 Kf8 35.Bd5 Ke8 36.Bc6) 31...Ra7 32.Bd4 Rh7 33.Bf6 Rg7 (33...Qf6 34.Qf6 Kg8 35.Qd8) 34.Bg7 Kg8 (34...Qg7 35.Qg7) 35.Bh6 (35.Bh6 Kh8 36.Bg7 Qg7 37.Qg7; 35.Nh6) 1–0. alessandrocarvalhaes (1835) – rubenmdd (1930), lichess.org, 2020.

4.e4 e6 5.c3 g6 6.Nd2 Bg7 7.a3 (7.Be2 0–0=) 7...Kf8 (7...0–0 8.Ngf3=+) 8.Ne2 (8.Be2 Bh6=) 8...Ke7 (8...Nc6!?=+) 9.c4= Re8 10.g4 (10.Nf4!? d6 11.Be2=) 10...Kf8=+ 11.g5 Nh5 12.Bg7 Ng7 (12...Kg7 13.Nf3=+) 13.h4 Nh5 14.Nc3 (14.Bh3 Nc6=) 14...Kg8 15.Be2 Ng7 (better 15...Nf4!?=+) 16.h5 Qg5 17.hg6 (17.h6 Qf6 18.d4 Nf5= (worse 18...Qd4 19.Nb5 Qf6 20.Nc7+–)) 17...fg6=+ 18.Nf3 Qf4 19.Rh4 Qf6 20.Kd2 Nc6 21.Qh1 h5 22.Nb5?? (better 22.Rg1!? d6 23.Qg2=) 22...Rac8 (better 22...Qb2 23.Ke3 Ne7–+) 23.Rb1 a6 (better 23...d5!?–+) 24.Nc3=+ Rf8 25.Bd1? (better 25.Rg1!?=+) 25...Nd4 (better 25...g5!? 26.Rh5 g4–/+) 26.Nd4–/+ Qf2?? (better 26...Qd4 27.f3 Qf6–+) 27.Nde2 Rf3 28.Rh3?? (better 28.Kc2+=) 28...Qe3–+ 29.Kc2 (29.Ke1 Rh3 30.Qg2 Rf8–+) 29...Rh3 30.Qf1 (30.Qe1 Qd3 31.Kb2 Be4–+) 30...Qd3 31.Kb2 Qd2 (better 31...Rf8 32.Qg1 Be4–+) 32.Bc2 Rf8 (better 32...Rh2 33.Rd1 Qg5 34.Rd7 Rf8–+) 33.Qh3+= d5?? (better 33...Be4 34.Ne4 Qe2+–) 34.Rd1+– Qg5 35.cd5 ed5 36.ed5 Re8? (36...Rf2+–) 37.Rg1 Qe5 (37...Re3 A) 38.Bg6?! Qg1 (worse 38...Rh3 39.Rg5 h4 40.Nd4+–) 39.Ng1 Rh3 40.Nh3 h4+–; B) 38.Rg5 Rh3 39.Rg6+–) 38.Rg6 (better 38.Bg6 Rf8 39.Bh5 Bd5+–) 38...Bd5 39.Qd7 (39.Qd3 Bf7 40.Rg1 Kf8+–) 39...Bf7 40.Rc6 (40.Rg1 c5 41.Qd3 Kf8+–) 40...Re7 (40...Ne6 41.Bb3 Kf8 42.Be6 Re6 43.Rc7+– (43.Qc7?! Qc7 44.Rc7 h4+–)) 41.Qd8 Ne8?? (41...Re8 42.Qc7 Qc7 43.Rc7 h4+–) 42.Nd4 Kg7 (42...Kf8 43.Rh6 c5 44.Nc6+–) 43.Nf5 (better 43.Nf3 Qe3 44.Nd5 Bd5 45.Rg6 Kf8 46.Qd5+–) 43...Qf5 (43...Kf8 44.Ne7 Qe7+–) 44.Bf5 Re5 45.Bd7 (45.Qg5 Kf8 46.Rh6 Bg8 47.Rh8 Re2 48.Ne2 Kf7 49.Rg8 h4 50.Nd4 h3 51.Be6) 45...Nf6 46.Rc7 (46.Qf6 Kg8 47.Qe5 Be8 48.Qe8 Kg7 49.Rg6 Kh7 50.Qg8) 46...Nd7 47.Rd7 (47.Qd7 Kg6 48.Qf7 Kg5 49.Qg7 Kf4 50.Qf6 Rf5 51.Nd5 Ke4 52.Re7 Kf3 53.Qf5 Kg3 54.Rg7 Kh4 55.Nf6 b5 56.Qh5) 47...Rf5 48.Rf7! Rf7 (48...Rf7 49.Qg5 Double attack; 48...Kf7 49.Qc7 Double attack) 49.Qb6 Rf6 50.Qb7 Rf7 51.Qa6 h4 52.Qe2 h3 53.Qh2 Rf3 54.Qe5 Rf6 (54...Rf6 55.Ne4 Kf7 56.Qf6 Ke8 57.Nc5 h2 58.Qg7 h1Q 59.Qd7 Kf8 60.Ne6 Kg8 61.Qg7). beatmeeasy (1895) – sergej_1962 (1970), lichess.org, 2020.

4.e4 g6 5.Nd2 d6 6.Ngf3 Bg7 7.Be2 e5 8.a3 0–0 9.c4 c5 10.b5 Nbd7 11.a4 Re8 12.Qc2 Nf8 13.h3 Ne6 14.Qc3 Nf4 15.Bf1 Ne6 16.Nb1 (16.Be2 a6=) 16...Nd4 17.Nd4 cd4 (17...ed4 18.Qc1–/+) 18.Qd2 Nd7 19.Ba3 Rc8 (19...Nc5!? 20.Qc2 f5–/+) 20.Bd6= Nc5 21.Bc5 bc5 22.Qc2 Rf8 23.Nd2 f5 24.f3 fe4 25.de4 (worse 25.fe4 Qh4 26.Kd1 Rf2=+) 25...Qh4 26.Kd1 Bh6 27.a5 Qf2 28.a6 Ba8 29.Qd3 (29.Ra2 Be3=) 29...Rc7 (better 29...Bd2!? 30.Qd2 Rf3–/+) 30.Kc2 Rcf7 31.Rd1 Rf3?? (better 31...Qh4=) 32.gf3+– Rf3 (32...Bd2 33.Rd2 Qf3+–) 33.Qf3 Qf3 34.Nf3 Be4 35.Bd3 (better 35.Rd3 Be3 36.Bg2 Kf8+–) 35...Bf3 36.Rhf1 Bd1 (36...Bg2 37.b6! ab6+–) 37.Kd1 Be3 38.Rf6 Kg7 39.Rc6 g5 40.Rc5 (40.b6 g4 41.ba7 Kf7 42.Rc7 Kf6 43.a8Q Kg5 44.Qg8 Kf6 45.Qd8 Ke6 46.Qe7) 40...h5 41.Re5 1–0. alessandrocarvalhaes (1880) – xene0 (1885), lichess.org, 2020.

4.e4 g6 5.Nf3 (--> 3.Nf3 Nf6 4.d3 g6 5.e4).

4.Nf3 (--> 3.Nf3 Nf6 4.d3).

3.d4 d6

4.c4 c5 (4...e6 5.Nf3=) 5.a3 cb4 (5...cd4 6.Bd4 e5 7.Bc3=) 6.ab4 Nf6 7.Nc3 (7.Nf3 e6=) 7...Nc6 (7...e6 8.Qa4 Nbd7 9.Nf3=) 8.b5 (better is 8.d5 Ne5 9.e4+=) 8...Qd7?? (better is 8...Na5 9.Qd3 Rc8=) 9.bc6+– Qc6 (9...Bc6 10.d5 Bb7 11.e4+–) 10.e3 e6 11.Nf3 d5? 12.c5! bc5 13.Bb5 cd4 14.Bc6 Bc6 15.ed4 Bb4 16.0–0 0–0 17.Ne5 Rac8 18.Nc6 Rc6 19.Ne2 Rfc8 20.Qa4 Bd6 21.Qa7 R6c7 22.Qa6 Ne4 23.f3 Nd2 24.Qd6 Nf1 25.Kf1 h6 26.Rb1 Rc2 27.Kf2 R8c6 28.Qd8 Kh7 29.Ke3 g5 30.Kd3 f5 31.Qd7 Kg6 32.h4 gh4 33.Nf4 Kg5 34.Nh3 Kg6 35.Qe8 Kf6 36.Qf8 Kg6 37.Nf4 Kg5 38.g3! hg3 39.Qg7 Kf4 40.Qh6 Kf3 41.Rf1 Rf2 42.Qh1 g2 43.Qh3 Kf4 44.Rf2 Kg5 45.Rg2 Kf6 46.Qh6 Ke7 47.Ba3 Kd7 48.Rg7 Ke8 49.Qh8 1–0. rla – Cleopatre, internet, 2007.

4.Nd2 Nd7 5.e4 g6 6.d5 Ngf6 7.c4 Bg7 8.b5 0–0 9.a4 Nc5 10.Qc2 Rc8 (10...e6 11.Be2=+) 11.Ngf3= e6 12.Be2 ed5 13.cd5 (13.ed5 Re8 14.Nd4=) 13...a6 (13...Re8!? 14.0–0 Nfe4 15.Bg7 Nd2 16.Qd2 Kg7=+) 14.0–0 ab5 15.ab5 Qe7 Increases the pressure on e4 (15...Re8 16.Bf6 Bf6 17.Rae1=) 16.Bc4 (16.Bd3!?+=) 16...Nfe4= (16...Nce4? 17.Rfe1 Rfe8 18.Ra7 Bd5 19.Bf6 Qf6 20.Bd5+–) 17.Rfe1 (17.Bg7 Kg7 18.Rfe1 f5=) 17...f5 18.Bg7 Kg7 19.Ne4 Ne4?? (19...fe4 20.Nd2 Qf6 21.Nb3=+) 20.Nd2 (20.Nd4 Rfe8 21.Ra7 Rb8+=) 20...Qf6 (better 20...Qf7!? 21.Ne4 fe4=) 21.Ne4+– fe4 22.Rab1 (better 22.Ra7 Ba8 23.Re4+–) 22...Rce8=+ 23.Re3 Bc8 24.Qb2 Re5 25.Be2?? (25.Rbe1 Kg8=+) 25...Bf5 (better 25...Qf2 26.Kh1 Qe3–+) 26.Bd1? (26.Rc1 Be6 (26...Rd5 27.Rc7 Rf7 28.Qf6 Kf6 29.Rf7 Kf7 30.Bc4+–) 27.Rc7 Kh8=+) 26...h5 (better 26...Rd5 27.Qb4 Rc5–+) 27.Bb3–/+ h4 28.Rc1 Qe7 (28...Re7 29.Qe2–/+) 29.Bc2 h3 30.g3 (30.Be4 A) worse 30...Be4 31.Re4 Kg8 32.Re5 de5 33.Rc3+= (worse 33.gh3 Qg5 34.Kf1 Qe3=+); B) 30...Kg8 31.Bf5 Re3 32.Be6 Re6 33.de6 Qe6 34.gh3 Rf5–/+) 30...Kh7 31.Bd1 (better 31.Qd4–/+) 31...Qf6 (31...Rd5 32.Be2–/+) 32.Be2 (32.Rc7 Rf7 33.Qc3 g5=) 32...Bd7 (better 32...Rf7–/+) 33.Rc7?? (better 33.f4 Rd5 34.Qf6 Rf6 35.Rc7=) 33...Qf2 34.Kh1 Qg2 0–1. alessandrocarvalhaes (1825) – Xucaras2 (1775), lichess.org, 2019.

4.e3 (--> 3.e3 d6 4.d4).

4.e4 e5 5.a3 d6 6.Nd2 Be7 7.Ngf3 Nbd7 8.Be2 c5 9.c3 cb4 (9...d5 10.ed5 Nd5 11.0–0=+) 10.ab4 (10.cb4 0–0=) 10...a5 (10...d5 11.ed5 Nd5 12.b5=) 11.b5 (11.0–0 0–0=) 11...Nc5 (11...d5 12.ed5 Nd5 13.0–0=) 12.c4 0–0 (12...Nh5 13.g3=) 13.Qc2 (13.0–0 Qc7=) 13...Qd7 (13...Nh5 14.d4 ed4 15.Nd4=) 14.0–0 Qe6 (14...Rfc8 15.Ra3=) 15.Rfe1 (15.Ra2 h6=) 15...h6 (15...Rfc8 16.Bd1=) 16.Rac1 (16.d4 ed4 17.Nd4 Qd7+=) 16...Nh7 (16...Rfc8 17.Bd1=+) 17.Ba3 (17.d4 ed4 18.Nd4 Qg6+=) 17...Rfd8 (17...Ng5 18.Rcd1=) 18.Nb3 (18.d4 ed4 19.Nd4 Qg6=) 18...g5 (18...Ng5 19.Ra1=) 19.Nc5 (19.d4 Nb3 20.Qb3 Be4+=) 19...dc5= 20.Bb2 f5? (better 20...Bf6!?=) 21.Ne5+– (worse 21.Be5 fe4 22.Bg3 ef3 23.Bf3 Qd7=+) 21...fe4 (better 21...Nf6 22.Nc6! Bc6 23.ef5 Qf5 24.bc6 Bd6+–) 22.Ba1 (22.Bh5 ed3 23.Nd3 Be4 24.Nc5 Bc2 25.Ne6 Rd2+–) 22...ed3? (better 22...Bf6 23.Nc6 Bc6 24.bc6 Ba1 25.Ra1 Rd4+=) 23.Bd3+– Nf6 (23...Rd3 24.Nd3 Qf7 25.Ne5+–) 24.Ng6 (better 24.Bh7 Nh7 25.Nc6+–) 24...Qf7 (24...Ne4 25.Ne7 Qe7 26.Be4 Be4 27.Re4 Qh7+–) 25.Ne7 (25.Re7 Rd7 26.Rf7 Rf7+–) 25...Kg7 (25...Kh8 26.Ng6 Kg8 27.Re7+–) 26.Bg6 Qf8 27.Bh5 (better 27.Nf5 Kg8 28.Re7 Rd4 29.Rb7 Rad8+–) 27...Be4 (27...Rd4 28.Re6 Nh5 29.Rh6 Kf7 30.Qg6 Ke7 31.Bd4 Ng7 32.Bg7 Kd7 33.Qe6 Kd8 34.Rd1 Bd5 35.Qd5 Qd6 36.Qd6 Kc8 37.Rh8 Kb7 38.Qe7) 28.Re4 Rd4 29.Rd4 cd4 (29...Qf7 30.Bf7 Rb8 31.Qg6 Kf8 32.Qf6 cd4 33.Ng6) 30.Qg6 Kh8 31.Nf5 (31.Bd4 Qe7 32.Bf6 Qf6 33.Qf6 Kg8 34.Bf7 Kf8 35.Bd5 Ke8 36.Bc6) 31...Ra7 32.Bd4 Rh7 33.Bf6 Rg7 (33...Qf6 34.Qf6 Kg8 35.Qd8) 34.Bg7 Kg8 (34...Qg7 35.Qg7) 35.Bh6 (35.Bh6 Kh8 36.Bg7 Qg7 37.Qg7; 35.Nh6) 1–0. alessandrocarvalhaes (1835) – rubenmdd (1930), lichess.org, 2020.

3.d4 e6

4.a3 a5 5.ba5 Ra5 6.Nf3=.

4.a3 Nf6 5.e3 Be7 6.Nf3 d6 7.Bd3 Nbd7 8.0–0 0–0 9.Nbd2 c5 10.c4 Rc8 11.b5 (11.dc5 dc5 12.b5 Qc7+=) 11...d5 (11...cd4 12.Nd4 (12.Bd4? e5–+) 12...Nc5 13.Be2=) 12.a4 Ne4 13.Qb1 Ndf6 (13...f5 14.a5=) 14.Rd1 Qc7 15.Rc1 (15.a5 Nd2 16.Nd2 cd4 17.Bd4 e5=) 15...Qb8 (15...Bd6 16.dc5 bc5 17.Bf6 Nf6 18.a5=) 16.Ba3 (16.a5 Bd6 17.h3 Bh2 18.Kf1 cd4 19.ab6 Nd2 20.Nd2 ab6 21.Bd4 Be5=) 16...Bd6 17.g3 (17.h3 Rfd8=+) 17...Rfd8 (17...cd4 18.ed4 Ba3 19.Ra3=+) 18.Ra2 (better 18.cd5!? ed5 19.a5=+) 18...Nd2–/+ 19.Nd2 cd4 20.Bd6 (20.ed4 Ba3 21.Ra3 dc4 22.Rc4 Rc4 23.Nc4 Rd4–/+) 20...Rd6 21.ed4 dc4 22.Rc4 Rc4 23.Nc4 Rd4 24.Rd2 Qd8 25.Qc2? (better 25.Qd1!? Qd5 26.f3–/+) 25...Qd5–+ The mate threat is Qg2 26.Kf1 Qh1 27.Ke2 Qd5?? (27...Bf3!? 28.Ke3 Rd5 29.h3–+) 28.Rd1?? (28.Kf1 h6 29.Ke1–+) 28...g6 29.Nd2 (29.h3 Qf3 30.Ke1 Qh1 31.Kd2 Qg2–+) 29...Qh5 30.Ke1 Qh2 31.Qc3 (31.a5 ba5 32.Nf1 Qh5–+) 31...Qh1 (31...e5 32.Nf1 Qg1 33.Qc2–+) 32.Ke2 Qd5 33.f3?? (33.Rc1 Ng4 34.f3 Qe5 35.Be4 Be4 (35...Re4?! 36.Ne4 Be4 37.Qe5 Bf3 38.Kf3 Ne5 39.Ke4+=) 36.Ne4 Ra4 37.Qe5 Ra2 38.Kd1 Ne5–+) 33...Ng4 (better 33...Qe5 34.Kf1 Qe3–+) 34.Be4 (34.Rc1 Qe5 35.Be4 Be4 (35...Re4?! 36.Ne4 Be4 37.Qe5 Bf3 38.Kf3 Ne5 39.Ke2+=) 36.Ne4 Ra4 37.Qe5 Ra2 38.Nd2 Ne5–+) 34...Qe5 (34...Re4?? 35.Ne4 (35.fe4?! Qg5=) 35...Qe5 36.Rd8 Kg7 37.fg4 Qc3 38.Nc3+–) 35.Qc2?? (35.Qa1 Qc5 (35...Re4 36.Ne4 Kg7 37.Qe5 Ne5 38.Rc1+–) 36.Qc1 Qh5 37.fg4 Qe5–+ (37...Re4?! 38.Ne4 Qg4 39.Kf2 Qe4 40.Rd8 Kg7 41.Qf4=+; 37...Qg4?! 38.Bf3 Rd2 39.Kd2 Qf3 40.Qc7–/+)) 35...Be4 (35...Qg3 36.fg4 Be4 37.Ne4 Qg4 38.Ke3 Qd1 39.Nf6 Kg7 40.Qd1 Rd1 41.Ne8 Kf8 42.Nf6–+) 36.fe4?? (better 36.Ne4 Rb4 37.Rd8 Kg7 38.Qc8–+) 36...Qg3 37.Rf1 Rd8 38.Qc1 (38.Rf3 Rd2! 39.Kd2 Qg2 40.Kc1 Qf3–+) 38...Qe3 (38...Qd3 39.Ke1 Nh2 40.Kf2 Qd2 41.Qd2 Rd2 42.Ke1 Nf1 43.Kf1–+) 39.Kd1 Nf2 (better 39...Qd3!? 40.Ke1 Nh2 41.Kf2 Qd2 42.Qd2 Rd2 43.Ke1 Nf1 44.Kf1–+) 40.Kc2 (40.Rf2 Qf2 41.Qc3 Rd2 42.Qd2 Qd2 43.Kd2–+) 40…Rc8 (40...Rc8 41.Kb1 Qd3 42.Kb2 Rc1 43.Kc1 Qc3 44.Kb1 Nd3 45.Nc4 Qb3 46.Ka1 Qc4 47.Rf2 Qd4 48.Ka2 Qf2 49.Kb3 Qb2 50.Kc4 Ne5) 0–1. petrobbo (1990) – Rubinstein82 (2280), ChessWorld.net, 2009.

4.a3 Nf6 5.Nf3 Bf3 6.ef3 d5 7.Bd3 a6 8.Qe2 Bd6 9.0–0 Qe7 10.c4 dc4 11.Bc4 Nbd7 (11...0–0 12.Nc3=) 12.Nd2 (12.Ba6!? 0–0 13.Nc3+=) 12...b5= 13.Bd3 g6 14.Ne4 0–0 15.Nf6 Nf6 16.Rfe1 Nd5 17.Be4 Qd7 18.Rac1 Rae8 19.g3 c6 20.Qc2 Rc8 21.Qd3 f5 22.Bd5 cd5 23.Rc8 Rc8 24.Rc1 Rc1 25.Bc1 Qc6 26.Bb2 Qc4 27.Qc3 (27.Qe3 Kf7+=) 27...Qc3–/+ 28.Bc3 Kg7 29.f4 Kf6 30.h4 h6 31.Kg2 g5 32.fg5 hg5 33.h5 g4 34.Bd2 e5 35.Be3 Bf8 36.f3 ed4 37.Bd4 Kg5–/+ 38.f4 Kh5 39.Kf2 Kg6 40.Ke3 Kf7 41.Be5 Ke6 42.Kd4 Be7 43.Bc7 Bf6 44.Be5?? Be5 45.fe5 f4! 46.gf4 g3 47.Ke3 d4! 48.Kf3 d3 49.Kg3 d2 0–1. 25bonifacy – kokso27, kurnik, 2012. (=1.d4 b6 2.b4 Bb7 3.Bb2)

4.a3 Qg5 5.Nf3 Qf4 (5...Qh5 6.e3=) 6.Bc1 (6.Nbd2 a5 7.e3 Qg4 8.ba5 Ra5+=) 6...Qf6 (6...Qf5 7.e3=) 7.Bg5 (7.Nbd2 d5+=) 7...Qf5 8.Bh4 (8.e3 Bf3 9.Qf3 Qf3 10.gf3 c5=) 8...h6 (8...a5!? 9.ba5 Qa5 10.c3 b5=) 9.e3+= Bf3 10.gf3 c6 (10...c5 11.c3+=) 11.Bd3 (11.Bg3 d5+=) 11...Qh5 12.Bg3 Qg5 (12...d5 13.Nd2+=) 13.f4 (13.c4 a5 14.b5 cb5 15.cb5 d5+=) 13...Qe7 (13...Qd8 14.c4+=) 14.e4 (14.f5 ef5 15.Bf5 d5+=) 14...Nf6 (14...d5 15.f3=) 15.e5+= Nd5 16.Be4 (16.c4 Nc7+=) 16...a5 (16...b5 17.f5=) 17.ba5 (17.b5 cb5 18.Bd5 ed5+=) 17...Ra5 (17...b5=) 18.Bd5 (18.c4!? Nc7 19.f5 ef5 20.Qb3=) 18...Rd5 (18...cd5 19.Ra2+=) 19.c3 (19.c4 Ra5+=) 19...Ra5 20.Qb3 (20.Qc2 g6+=) 20…b5 (20...b5 21.a4 Qd8+=; 20...Qd8 21.f5+=). michas – cocohubert (1710), internet, 2007.

4.b5 Ne7 5.e3 Ng6 6.Nf3 Nh4 7.Be2? (better is 7.Nbd2!?=) 7...Ng2–/+ 8.Kd2 Qf6 9.Rg1 Nh4 10.Ne5 Qf2 11.Rf1 Qh2 12.Rf7 Nc6?? (better is 12...Nf5 13.Kc1 Bd6–+) 13.bc6+= Bc6 14.Rf4 0–0–0?? 15.Nf7+– Bb4 16.c3 Bd6 17.Ne5?? Be5–+ 18.de5 Rhf8 19.Rf8–/+ Rf8 20.Na3?? Rf2–+ 21.c4 Bf3 22.Bd4 Re2 23.Kc3 Re3! 24.Be3 Bd1 25.Rd1 Qe5 26.Bd4 Qa5 27.Kb3 Nf5 28.Bc3 Qc5 29.Nc2 b5 30.cb5 Qb5 31.Ka3 Nd6 (31...Nd6 32.Rd6 cd6–+) 0–1. typ48 – utyman, kurnik, 2012.

4.b5 Nf6 5.c4 d6 6.Nd2 Nbd7 7.e3 Qe7 8.Ngf3 0–0–0 (better is 8...a6!?=) 9.a4+/– Kb8 10.a5 Rc8 11.ab6 cb6 12.Qa4 a5? (better is 12...Kc7+/–) 13.ba6+– Ba8 14.Ba3 Qd8 15.a7 Kc7 16.c5! dc5 17.dc5 Nc5 18.Bc5 Bc5 19.Ba6 Bb7 20.Nb3 Qe7? 21.0–0 Ra8 22.Bb7 Kb7 23.Qa6 Kc7 24.Rfc1 Ne4? 25.Nfd4 Qf6 26.f3 Ng5 27.Nc5 Nf3 28.Nf3 bc5 29.Rc5 Kd7 30.Qb7 Ke8 31.Qa8 Ke7 32.Qb7 Kd6 33.Qb6 Ke7 34.Rc7 Kf8 35.Qb8 (35.Qb8 Qd8 36.Qd8#; 35.a8Q Qd8 36.Qd8#) 1–0. typ48 – racjastanu, kurnik, 2012.

4.b5 Nf6 5.c4 d6 6.e3 Nbd7 7.Nd2 Be7 8.Bd3?? (better is 8.Ngf3=) 8...Bg2–+ 9.e4 (9.Ne2 Bh1 10.f3 Bg2–+) 9...Bh1 10.e5 de5 11.de5 Ng8 12.Be4 Be4 13.Ne4 Nc5 14.Qf3 Ne4 15.Qe4 Bb4 16.Kf1 Ne7 17.Ne2 Nf5 18.a3 Bc5 19.Nc3 g6 20.Qc6 Kf8 21.Ne4 Kg7 22.Kg2 Ne7 23.Qb7 Qc8 24.Nd6 Qb7 25.Nb7 Nf5 26.Nc5 bc5 27.a4 Rhd8 28.Ba3 Rd4 29.Bc5 Rc4 30.Ba3 Rd8 31.a5 Rd5 32.Rb1 Re5 33.Bb2 Nd4 34.b6 cb6 35.ab6 ab6 36.Bd4 Rd4 37.Rb6 h5 0–1. typ48 – wojtis1970, kurnik, 2012.

3.d4 f6

4.Nd2 e6 5.e4 g6 6.Ngf3 Bg7 7.Bc4 Qe7 8.0–0 f5 9.ef5 gf5 10.Re1 c5 11.d5 Bb2 12.Rb1 Bc3 13.Rb3 Bb4 14.a3 Bd2 15.Qd2 Nf6 16.de6 d5 17.Bb5 Nc6 18.Bc6 Bc6 19.Ng5 0–0 20.Rh3 h5 21.Nf7 Rf7 22.ef7 Qf7 23.Qg5 Kf8 24.Qf5 Re8 25.Re8 Ke8 26.Re3 Kd8 27.Qd3 c4 28.Qc3 b5 29.Qa5 Qc7 30.Qb4 d4 31.Rf3 Bf3 32.gf3 d3 33.cd3 cd3 34.Qd4 Qd7 35.Qf6 Kc7 36.Qc3 Kb6 37.Qd2 Qd6 38.f4 Qa3 39.f5 b4 40.f6 b3 41.Qd3 Qb4 42.f7 b2 43.Qd8 Kb7 44.f8Q b1Q 45.Kg2 Qg4 0–1. arti000 – agacza26, kurnik, 2012.

4.e3 d6 5.c4 e5 6.d5 Ne7 7.b5 g6 8.a4 Bg7 9.Bd3 0–0 10.Nf3 Nd7 11.0–0 a6 12.Nc3 Nc5 13.Be2 Qd7 14.ba6 Ba6 15.Nb5 Bb5 16.ab5 (worse is 16.cb5 Ra7+=) 16...e4 17.Nd4 f5 18.Qc2 h5 19.Nc6 Nc6 20.bc6 Qe7 21.Ra8 Ra8 22.Ra1?? (better is 22.Bd4=) 22...Ra1–+ 23.Ba1 Ba1 24.h4 Qh4 25.g3 Qe7 26.Qa2 Be5 27.Kg2 Kg7 28.Qa8 Nd3 29.Qa3 Ne1 30.Kf1 Nf3 Black intends h4 31.Qa4 h4 32.Qd1 hg3 33.Bf3 ef3 34.Qf3 gf2 35.Qf2 Qg5 36.Qf3 Qg3 37.Qg3 Bg3 38.Kg2 f4 39.e4 Kf6 40.Kf3 Ke5 (40...Ke5 41.Kg4 Ke4–+) 0–1. typ48 – tohri, kurnik, 2011.

3.d4 Nf6

4.Nd2 e6 5.a3 a5+=.

4.Nd2 e6 5.a3 Be7 6.Ngf3= 0–0 7.e3 d6 (7...a5!?+=) 8.Bd3= Nbd7 (8...Nc6 9.0–0+=) 9.c4+= c5 10.b5 (10.0–0 Qc7+=) 10...cd4 (10...Qc7 11.0–0=) 11.ed4 d5 12.a4 (12.0–0!?=) 12...dc4+= 13.Nc4 (13.Bc4 Qc7+=) 13...Bb4–/+ 14.Kf1 Nd5 (14...Rc8–/+) 15.Nfe5? (15.g3 Qf6 16.Nfe5 Ne5 17.de5 Qh6–/+) 15...Rc8 16.Rc1 Nf4 17.f3 Nd3 18.Qd3 Ne5–+ 19.Ne5 Rc1 20.Bc1 Qd5 21.Be3 Rd8 22.Kf2?? Qe5!! 0–1. mic (2140) – rzens (2345), net–chess.com, 2007.

4.Nd2 e6 5.c3 c5 6.a3 Be7+=.

4.Nd2 e6 5.e3 Bb4–/+ 6.c3 Be7 7.Ngf3 0–0 8.Be2 (8.Bd3 c5–/+) 8...d5 9.Qc2 (9.Bb5 c6 10.Bd3 c5–/+) 9...c5 10.0–0 Nbd7 (10...Nc6 11.h3–/+) 11.Ne5 cd4 12.cd4 Rc8 13.Qb3 (13.Qa4 Ne5 14.de5–/+) 13...a6 (13...Ne5!? 14.de5 Nd7–/+) 14.Nd7 (14.Rac1 Ne5 15.de5 Nd7–/+) 14...Nd7 (14...Qd7 15.Qb6 Rc2+=) 15.f3 (15.Rac1 b5+=) 15...Nf6 (15...b5 16.Ba3–/+) 16.Rac1 (16.a4 g6+=) 16...Qd6 17.Bd3 Qb4 (17...b5 18.Rfd1–/+) 18.Bc3 (18.Nb1 Qb3 19.ab3 g5–/+) 18...Qb3 19.Nb3 (19.ab3 Rc6–/+) 19...Rc6 (19...Ba3 20.Rc2–/+) 20.Bb2 Rfc8 21.Rc6 Rc6 22.Rc1 Rc1 23.Bc1 g6 24.Bb2 Nd7 25.Kf2 f5 26.g3 Kf7 27.Bc3 b5 28.Na5 Ba8 29.Bc2 Nb6–+ 30.Ke2 Nc4 31.Nc4 dc4 32.e4 b4 33.Bd2 fe4 34.fe4 a5 35.Kf3 a4 36.Ke2?? b3–+ 37.ab3 cb3 38.Bd3 a3 39.Bc4 b2 40.Ba2 Be4 41.Ke3 b1Q 42.Bb1 Bb1 43.Bc3 Bg5 44.Ke2 Bc1 45.Ba1 Bb2 (45...Bb2 46.Bb2 ab2–+) 0–1. mic (2215) – mrazo (2240), net–chess.com, 2007.

4.e3 g6 5.c4 Bg7 6.Nf3 0–0 7.Nbd2 Nc6 8.b5 Na5 9.Nb3 Nb3 10.ab3 c6 11.bc6 dc6 12.Be2 Re8 13.0–0 Qc7 14.b4 Nd7 15.Ra2 c5 16.bc5 bc5 17.d5 Nf6 18.Qa1 a6 19.e4! Ne4? (better is 19...Bc8+/–) 20.Bg7+– f6 21.Bh6 Nd6 22.Ng5 Nf5 23.Ne6 Qd6 24.Bf4 Qd7 25.Nc5 Qc8 26.Nb7 Qb7 27.Rd1 g5 28.Bg3 Ng3 29.hg3 h5 30.Bh5 Qb3 31.Be8 Re8 32.c5 f5 33.d6 f4 34.d7 Rd8 35.c6 fg3 36.c7 gf2 37.Kh1 (37.Kh1 Rf8 38.Rf2+–) 1–0. typ48 – andspitfire, kurnik, 2012.

4.f3 Nd5 5.a3 e6 6.e4 Nf4 7.g3 Ng6 8.c4 a5 9.b5 Be7 10.Bg2 d5 11.Nd2 dc4 12.Nc4 Nf8 13.Ne2 Nfd7 14.0–0 0–0 15.a4 c6 16.Qb3 cb5 17.ab5 Bb4 18.Rfd1 Qe7 19.Nf4 Nf6 20.d5 ed5 21.ed5 Nbd7 22.Bd4 Rfc8 23.Nb6 Nb6 24.Bb6 Bc5 25.Bc5 Qc5 26.Kh1 Qc4 27.Qc4 Rc4 28.d6 Nd7 29.Nd5 Rc5 30.Ne7 Kf8 31.Nc6 Rb5 32.f4 Rc8 33.Rac1 Rc5 34.Rc5 Nc5 35.Ne7 Bg2 36.Kg2 Rd8 37.Nc6 Rd7 38.Rb1 g6 39.Rb5 Ne4 40.Rb8 Kg7 0–1. karoo54 – slawek103, kurnik, 2012.

4.Nf3 e6 5.c3 Bd6+=.

3.e3 a5

4.a3 ab4 5.ab4 Ra1 6.Ba1 Nf6 7.Bf6 ef6 8.Nf3 Bb4 9.c4 Be7 10.d4 0–0 11.Be2 d5 12.Nbd2 dc4 13.Nc4 Qd5 14.0–0 Rd8 15.Qc2 b5 16.Na3?? (16.Na5!? Ba8 17.Qc7+=) 16...b4?? (better is 16...Ba3 17.Bd3 c5–+) 17.Nb5 (17.Qc7!? Qd7 18.Qd7 Nd7 19.Nc4+=) 17...c6–/+ 18.Bc4 Qd7 19.Na7 Ba6 20.Ra1?? Qa7–+ 21.Ba6 Na6 22.Qc6 Ra8 23.Nd2 Qc7?? 24.Qa8+– Bf8 25.Qa6 Qc2 26.Nf1 g6 27.Qa2 Qc3 28.Rb1 Kg7 29.Qb3 Qc6 30.Nd2 Bd6 31.Nc4 Bf8 32.Nb2 Bd6 33.Nd3 Qc7 34.g3 h5 35.Nb4 h4 36.e4 hg3 37.hg3 Qb6 38.Nc2 Qa6 39.e5! fe5 40.de5 Be5 41.Ne3 Qe2 42.Rf1 1–0. horacyad2010 – brianks, kurnik, 2011.

4.ba5 ba5 5.c4 c6 6.Nf3 Qb6 7.Bc3 Na6 8.a3 Nc5 9.d4 Ne4 10.Bd3 Nc3 11.Nc3 Nf6 12.0–0 Qc7 13.c5 d6 14.cd6 Qd6 15.Ne5 c5 16.Bb5 Kd8 17.Nf7 Kc7 18.Nd6 ed6 19.dc5 dc5 20.Be2 Bd6 21.Nb5 Kd7 22.Qd6 Ke8 23.Nc7 Kf7 24.Na8 Ba8 25.Qc5 Ne4 26.Bc4 Kf6 27.Qb6 Ke7 28.Qa5 h5 29.Bd5 Bd5 30.Qd5 Nf6 31.Qb7 Ke6 32.a4 h4 33.a5 h3 34.a6 hg2 35.Kg2 Ng4 36.a7 Rh2 37.Kg3 Kf5 38.Qd7 Kg5 39.Qg4 Kf6 40.Kh2 1–0. vihavald – gregorioo1, kurnik, 2012.

4.ba5 Ra5 5.Nf3 d6 6.Be2 e5 7.d3 Nf6 8.Nbd2 Nc6 9.0–0 Be7 10.Nc4 Ra7 11.a3 0–0 12.Ncd2 Ba6 13.g3 Na5 14.d4 ed4 15.Ba6 Ra6 16.Nd4 c5 17.Qe2 Ra8 18.Nf5 Qd7 19.Ne7 Qe7 20.Nc4 Nc4 21.Qc4 Rab8 22.Rad1 b5 23.Qf4 Rb6 24.Kg2 h6 25.h4 Nd7 26.Qg4 f6 27.Rd5 Ne5 28.Be5 de5 29.Rd7 Qe6 30.Qg7 1–0. sunnyda – jhon2, kurnik, 2012.

4.b5 (--> 1.b4 a5 2.b5 b6 3.e3 Bb7 4.Bb2).

4.c4 ab4–/+ 5.Qb3 c5 (5...Na6 6.Nf3–/+) 6.d4 d6 (6...Nc6 7.Nf3–/+) 7.dc5 (7.a3 ba3 8.Na3 Nf6=+) 7...bc5–/+ 8.Nf3 Nf6 9.Nbd2 g6 (9...Nbd7 10.Be2–/+) 10.Be2 (10.a3 Nc6=+) 10...Bg7–/+ 11.a3 Nc6 12.0–0 0–0 13.ab4 Ra1 14.Ra1 Nb4 15.Nb1 Qb6 16.Nc3 Ra8 17.Nb5 Ra1 18.Ba1 Ne8 (18...Qa5 19.Bb2–/+) 19.Bg7 Kg7 20.Ne1 Nc7 21.Nc2 Nc2 22.Qc2 Nb5 23.cb5 d5 24.Bf3 (24.Qa4 c4–/+) 24...e5 (24...Qb5!? 25.h3–+) 25.Qb2 (25.Be2 c4 26.Qc3 Kg8–/+) 25...f6 26.Qb3 c4 27.Qb4 Kf7 28.h3 (28.Qa4 e4 29.Bg4 f5–+) 28...h6 (28...Bc6 29.Kf1–+) 29.g4 (29.e4 Qd4 30.Qd6 de4 31.Qc7 Ke6 32.Qb7 ef3 33.Qc8 Ke7 34.Qc7 Qd7 35.Qc4 Qd1 36.Kh2 fg2 37.Kg2 Qd6–/+) 29...f5 Black prepares the advance e4 (29...e4 30.Be4 de4 31.Qc4 Ke7 32.Qb4 Ke6 33.Qc4 Bd5 34.Qc8 Ke7 35.Qa6 Qa6 36.ba6–+) 30.Kg2? (better 30.gf5 e4 31.Bg4–/+) 30...e4–+ 31.Be2 Bc8 32.Kg3 (32.Qa4 fg4 33.Bg4 Bg4 34.hg4 h5–+) 32...Bd7 (32...fg4 33.Bg4 Bg4 34.hg4–+) 33.Qc3 (33.gf5 Bf5 (33...Qb5 34.fg6 Kg6 35.Qd6 Kg7 36.Bh5+–) 34.Kg2 Bd7–+) 33...Kg8 (33...Qd6 34.Kg2 Bb5 35.gf5 gf5 36.Bh5 Kg8 37.f4–+) 34.Qe5 Qe6?? (better 34...Qb5 35.gf5 gf5–+ (35...Bf5?! 36.Bc4 Qc4 37.Qe8 Kg7 38.Qe7 Kh8 39.Qe5 Kh7 40.Qe7 Kg8 41.Qe8 Kg7 42.Qe7 Kg8 43.Qe8=)) 35.Qb8 (35.Qe6 Be6 36.b6 Bc8 37.gf5 g5= (37...Bf5?? 38.b7+–)) 35...Kg7 36.b6 Qe5?? (36...f4 37.ef4 Bc6 38.Qc7 Kf8+–) 37.Qe5+– Kh7 38.Qd6 (38.Qe7 Kh8 39.b7 Be6 40.b8Q Bc8 41.Qc8) 38…h5 (38...h5 39.Qd7 Kh8 40.b7 h4 41.Kg2 d4 42.b8Q; 38...Bc8 39.Qc7 Kg8 40.Qc8 Kf7 41.gf5 d4 42.Qe6 Kf8 43.b7 gf5 44.b8Q Kg7 45.Qbg8). RichardSommer (2085) – Misk123 (2250), lichess.org, 2020.

3.e3 a6

4.a4 c6 5.b5 (5.Nf3 e6+=) 5...ab5= 6.ab5 Ra1 7.Ba1 c5 (7...d5 8.f4=) 8.Nf3 (8.Qg4 Nf6 9.Qa4 d6=) 8...e6 (8...d5 9.g3=) 9.c4 (9.Be2 d5=) 9...d6 (9...d5 10.cd5 ed5 11.Be5=) 10.Be2+= e5 (10...Nf6 11.Nc3+=) 11.0–0+– Nf6 12.d4 ed4 13.ed4 Be7 14.d5 0–0 15.Re1 Nbd7 16.Qc2 Nh5 (16...Re8 17.Nc3+=) 17.Bd3 g6 18.Nbd2 Ndf6? (better 18...Nf4!?+=) 19.Qc3+– h6 (19...Re8 20.g4 Bd5 21.Re7 Qe7 22.gh5+–) 20.Re7! Qe7 21.Ne4 Kh7 (21...Bc8 22.Nf6 Nf6 23.Qf6 Qf6 24.Bf6+–) 22.Nf6 Nf6 23.Qf6 Qf6 24.Bf6 Ra8 25.Be7 (better 25.h3 Ra7 26.Bd8 Ra1 27.Kh2+–) 25...Ra3? (25...Ra1 26.Bf1 Bc8+–) 26.Bf1 h5 (26...Bc8 27.Bd6 Ra7+–) 27.Bd6 f5 (27...Ra7 28.Bb8 Ra1 29.Bc7+–) 28.Bc7 Kh6 (28...Kg7 29.d6 Bc8 30.Ne5+–) 29.Bb6 g5 (29...Ra1 30.Bc5 Rd1 31.Bf8 Kh7 32.Ne5+–) 30.Bc5 (30.d6 Bc8 31.Ne5 f4+–) 30...Ra8 (30...Ra1 31.Bf8 Kg6 32.Be7+–) 31.Be7 g4 (31...Ra1 32.d6 Bc8 33.c5+–) 32.Ne5 f4 (32...Bc8 33.d6 f4 34.b6+–) 33.d6 f3 34.d7 fg2 35.Bg2 Ra1 36.Bf1 Ra8 1–0. GuestTFGS – GuestWGYV, freechess.org, 2020.

4.a4 d6 5.b5 ab5 6.ab5 Ra1 7.Ba1 Nf6 (7...e5 8.d4 Nd7 9.Nf3=) 8.Nf3 (8.Bf6 gf6 9.d4 e6+=) 8...e5= 9.c4 Be7 10.Be2 0–0 11.0–0 Nbd7 12.d4 Re8 (12...e4 13.Nfd2+=) 13.Bc3 (13.de5 Ne5 14.Ne5 Qa8+=) 13...ed4 14.Nd4 Ne4 15.Bb2 Ndc5 16.Nd2 Nd2 17.Qd2 Ne4 (17...Bf6 18.Bf3 Bf3 19.Nf3 Bb2 20.Qb2=) 18.Qd1 Bf6 19.Bf3 Nc5? (better 19...Qe7=) 20.Bb7+– Nb7 21.Nc6 Qd7 22.Bf6 gf6 23.Qh5 (23.Qf3 Qe6+–) 23...Qe6+– 24.Qh4 f5 (24...Nc5 25.Ra1+–) 25.Rd1 (25.Nb4!? Qe7 26.Qg3 Kh8+–) 25...Nc5 26.Rd5 (better 26.Nb4 Qe4 27.Qg5 Kh8 28.Qf6 Kg8 29.Nd5+–) 26...Qg6? (26...Qe4 27.Qg5 Kf8 28.h3+– (28.Qf5?! Qc4 29.Qh5 f6=)) 27.Qf4?? (better 27.Ne7 Re7 28.Qe7+–) 27...Ne6+– 28.Qf5 Qf5 29.Rf5 Ra8 Do you see the mate threat? 30.h4 (30.f3 Ra4+–) 30...Ra4+= 31.Ne7 (31.g3!?+=) 31...Kf8= 32.Nd5 Rc4 33.Nf6 (33.Rh5 Rc5 34.Nf6 Kg7 35.Rc5 dc5+=) 33...Kg7 (33...Rh4 34.g4=) 34.Ne8 (34.h5 Rb4=) 34...Kf8 35.Nf6 Kg7 (35...Rh4 36.g4=+) 36.Ne8 (better 36.h5=) 36...Kg6?? (better 36...Kf8 37.Nf6=) 37.Rf6+– Kh5 38.Rf7 Rc5?! (38...Kh4 39.Rh7 Kg5+–) 39.Rh7 Kg6 40.Re7 Kf5 (40...Nf8 41.Rc7 (41.Nc7?! Kf6 42.Re8 Ng6+–) 41...Rb5 42.g4+–) 41.g4! Ke5 (41...Kg4 A deflection 42.Re6) 42.f4 Kd5 43.f5 Nd8 44.h5 Rb5 (44...Kc4 45.h6 Re5 46.Re5 de5+–) 45.Nc7 Kc6 46.Nb5 Kb5 47.h6 Nc6 48.h7 (better 48.f6 Ka4 49.h7 Kb3+–) 48...Ne7 49.h8Q (49.h8Q Nc6 50.g5+–) 1–0. BeepBeepImAJeep (2540) – NaSil (2475), lichess.org, 2018.

4.c4 Nc6 5.a3 e6 6.Nf3 d6 7.d4 Nf6 8.Nbd2 Be7 9.Be2 0–0 10.0–0 d5 11.cd5 Nd5 12.Rc1 b5 13.Nb3 Bd6 14.Nc5 Bc8 15.Ne4 f5 16.Nd6 cd6?? (better is 16...Qd6 17.Qc2 Bb7+=) 17.Rc6+– Bb7 18.Rc2 f4 (18...a5 19.ba5 Qa5 20.Qd2+–) 19.e4 Nf6 20.e5 Ne4 21.Re1 g5 (21...d5 22.Bd3+–) 22.h3 h5 (22...d5 23.Nd2+–) 23.Nd2 (23.ed6 Bd5 24.Ne5 Nd6 25.Bh5 Bb3+–) 23...g4 (23...Nd2 24.Qd2 f3 25.Qd3+–) 24.Ne4 (better is 24.Bg4!? hg4 25.Qg4 Ng5 26.ed6 Rf7+–) 24...Be4 25.Bd3 (25.Bd3 Bd5 26.hg4+–) 1–0. Fournier,Frederic (1765) – ivan031 (1780), ChessOK.com, 2012.

4.Nf3 c6 5.Nc3 b5 (5...e6 6.a3=) 6.Ne4+= d6 7.Bd3 (7.a4 e5+=) 7...h6 (7...e5 8.Ng3=) 8.Nd4 (8.0–0 e5 9.Ng3 a5+=) 8...e5 9.Nb3 f5? (better 9...Nd7+=) 10.Qh5+– Kd7 (10...Ke7 11.Qf5 Qe8 12.Qh3+–) 11.Qf7 (better 11.Qf5 Kc7 12.a4+–) 11...Ne7?? (better 11...Qe7 12.Qf5 Kd8+–) 12.Nec5! dc5 13.Nc5 Kc7 14.Ne6 (14.Ne6 Kc8 15.Nd8 Kd8 16.Bf5+–) 1–0. Marcus – 194, internet, 2018.

4.Nf3 e6 (--> 3.e3 e6 4.Nf3 a6).

4.Nh3 b5 5.Nc3 (5.a4 Nc6=) 5…f6=. estrella (1725) – tmitchell (1820), net–chess.com, 2007.

4.Nh3 Nc6!?=.

4.Nf3 Nf6

5.a4 h6 6.Bd3 g5 7.0–0 g4 8.Nh4 Bg7 9.g3 Rg8 10.Nf5 e6 11.Ng7 Rg7 12.c4 Rg8 13.b5 a5 14.Nc3 d5 15.cd5 Nd5 16.Nd5 Qd5 17.Be2 Qg2# 0–1. riditko – gumis1966, kurnik, 2012.

5.c4 g6 (5...e5 6.Ne5 Bb4 7.Be2=) 6.Be2 Bg7 7.0–0 0–0 8.d4 e6 9.a4 (9.Nc3 d6+=) 9...d6 10.b5 (10.Nc3 Nbd7+=) 10...ab5 (10...c5 11.dc5 dc5 12.Qb3=) 11.ab5+= Ra1 12.Ba1 Nbd7 13.Nbd2 Re8 14.Qc2 d5 (14...Qe7 15.Bc3+=) 15.Nb3 (15.Bb2 dc4 16.Qc4 Qb8+=) 15...dc4 16.Qc4 Bd5 17.Qc2 e5 (17...Be4!? 18.Qb2 e5+=) 18.de5 Ng4 19.Rd1 Be6 (19...Bb3!? 20.Qb3 Qe7+/–) 20.h3 Nh6 21.Rc1 (21.Nbd4!? Qc8+–) 21...Bb3+/– 22.Qb3 Nc5 23.Qb2 Nf5 24.Rd1 Qe7 25.Qd2 Ne4 26.Qd7 Nc5 27.Qe7 Re7 28.Rd5 Re8 29.Bd4 Ne7+= 30.Rc5 bc5 31.Bc5 Nd5 32.Bd4 f6?? 33.Bc4+– Rd8 34.ef6 Bf6 35.Bf6 Rd7 36.e4 Kf7 37.Bd4 Ke7 38.Bd5 1–0. carocan (1795) – 1808dar, kurnik, 2011.

5.Be2 g6 6.0–0 Bg7 7.Nd4 e5 8.Nf3 Qe7 9.a3 g5? (better is 9...d6!?=) 10.Ne5+/– d6 11.Nf3 Nbd7 12.Ng5 (12.Nc3 Ne4+/–) 12...h6?? (12...Ng8 13.Nf7 Bb2= (13...Qf7? 14.Bh5 Bb2 15.Bf7 Kf7 16.Ra2+–; 13...Kf7?! 14.Bh5 Kf8 15.Bf3=)) 13.Bf3 d5 14.Nh3 0–0–0 15.d3 Rdg8 16.c4 Nh5? 17.Bg7 Rg7 18.cd5 Ne5 19.e4 Nf3 20.Qf3 Rhg8 21.g3 Nf6 22.Nd2 h5 23.Rac1 h4 24.Rc2 hg3 25.fg3 Nh5 26.Rfc1 Kb8 27.Rc7 Qd6 28.Rf7 Ng3 29.Rg7 Rg7 30.Kf2 Ne4 31.de4 Qh2 32.Ke3 Rg3 33.Nf4 Rf3 34.Nf3 Qh7? 35.Ne6 Qh6 36.Kd4?? Qf6 37.Ne5= Qf2 38.Kd3 a5?? 39.Rc7?? Ba6= (39...Ba6 40.b5 Bb5 41.Nc4 Qf1 42.Kc3 Qc1 43.Kd4 Qa1 44.Kd3 Qa3 45.Kd4 Qa1 46.Kd3 a4–+) 0–1. elsh1403 – poetico, kurnik, 2011.

5.Be2 g6 6.c4 Bg7 7.d4 0–0 8.0–0 d6 9.h3 Nbd7 10.Nh2 Ne4 11.f4 Nef6 12.f5 e5 13.Bf3 Bf3 14.Rf3 e4 15.Rf2 g5 16.Ng4 h5 17.Nf6 Nf6 18.d5 Re8 19.Nd2 g4 20.hg4 Ng4 21.Bg7 Nf2 22.Kf2 Kg7 23.Qh5 Qf6 24.Rh1 Rh8 25.Qg4 Kf8 26.Rh8 Qh8 27.Ne4 Qg7 28.Qh4 Qb2 29.Kf3 Re8 30.f6 Re4 31.Qh8 1–0. horacyad2010 – burza56, kurnik, 2012.

5.Bf6 ef6 6.c3 g6 7.d4 Bg7 8.Be2 d6 9.0–0 Nd7 10.a3 Qe7 11.Nbd2 g5 12.h3 h5 13.Nh2 g4 14.hg4 hg4 15.Bg4 0–0–0 16.Ndf3 Rdg8 17.a4 Kb8 18.Bd7 Qd7 19.a5 b5 20.Qd3 c6 21.c4 f5 22.Rfc1 Bf8 23.cb5 cb5 24.d5 Bg7 25.Rab1 Be5 26.Ne5 de5 27.Rc5 Rc8 28.Rbc1 e4 29.Qd4 f6 30.Qf6 Qh7 31.Rc8 Rc8 32.Qd6 Ka8 33.Rc8 Bc8 34.Qc6 Qb7 35.Qb7 Kb7 36.Nf1 Kc7 37.Ng3 Kd6 38.Nf5 Bf5 39.f3 ef3 40.gf3 Kd5 41.e4 Be4 42.fe4 Ke4 43.Kf2 Kd4 44.Ke2 Kc4 45.Kd2 Kb4 46.Kd3 Ka5 47.Kc3 Ka4 48.Kb2 a5 49.Ka2 Kb4 50.Kb2 Kc4 51.Ka3 Kc3 52.Ka2 Kc2 53.Ka3 b4 54.Ka4 b3 55.Ka5 b2 56.Kb4 b1Q 57.Kc4 Kb2 58.Kd4 Qc1 59.Kd3 Kb3 60.Kd4 Qc3 61.Kd5 Kb4 62.Ke4 Kc4 63.Kf4 Qd3 64.Ke5 Qd4 65.Kf5 Kd5 66.Kg5 Ke5 67.Kg6 Ke6 68.Kg5 Qe5 69.Kg4 Kf6 70.Kf3 Kf5 71.Kf2 Kf4 72.Kg2 Qe4 73.Kf2 Qe3 74.Kg2 Qf3 75.Kh2 Kf5 76.Kg1 Kg5 77.Kh2 Qf2 78.Kh3 Kg6 79.Kg4 Qf5 80.Kg3 Kg5 0–1. joaquimbage – chupacabara, kurnik, 2012.

4.Nf3 h6

5.c4 e6 6.b5 a5 (6...Nf6 7.Be2=) 7.a4 d6 8.Be2 Nd7 9.0–0 Ngf6 10.d4 Qe7 11.Nc3 g6 12.h3 Bg7 13.Nh2 g5 14.Bf3 White plans d5 14...h5?? (better is 14...0–0–0+=) 15.Bb7+– Rb8 16.Bc6 0–0 17.Bd7 Qd7 18.d5 e5 19.f4 ef4 20.ef4 g4 21.hg4 hg4 22.Ne2 g3 23.Nf3 Nh5 24.Bg7 Kg7 25.Qe1 Qf5 26.Ng3 Nf4 27.Nf5 Kg8 28.Qg3 Ng6 29.Ne7 Kg7 30.Ng6 fg6 31.Nh4 Rf1 32.Rf1 Rg8 33.Qg6 Kh8 34.Qg8! Kg8 35.Re1 (35.Re1 c6 36.bc6 Kf8 37.c7 Kg7 38.c8Q b5 39.Qg4 Kf8 40.Qd7 bc4 41.Re8#) 1–0. alfons78 – lakslaks, kurnik, 2011.

5.c4 Rh7 6.a4 g5 7.Bd3 g4 8.Bh7 gf3 9.gf3 Nf6 10.Bf6 ef6 11.Nc3 Bb4 12.Ne4 Qe7 13.Rg1 Qe5 14.Rg8 Bf8 15.Rb1 Nc6 16.Qc2 0–0–0 17.Qb2 Qh2 18.Qf6 Qh1 19.Ke2 Qb1 20.Qf7 Bb4 21.Nd6 Bd6 22.Bb1 Rg8 23.Qg8 Nd8 24.Qh8 b5 1–0. riditko – kaczapaya, kurnik, 2012.

5.Be2 d6 6.0–0 Nd7 7.a3 e6 8.Ne1 Qe7 9.c4 0–0–0 10.d4 Ngf6 11.Nc3 g5 12.h3 Bg7 13.Nc2 h5 Black intends g4 14.d5 e5 (better is 14...g4!? 15.h4 Ne4 16.Ne4 Bb2+=) 15.e4 Rdg8 16.f3 Bf8 Black prepares g4 17.Kh1 (better is 17.Ne3!?+=) 17...g4+= 18.h4?? (18.b5 gh3 19.g3 Rg3–+) 18...gf3?? (better is 18...Nd5 19.Kg1 Qh4 20.fg4 hg4 21.Bg4 Nc3 (21...Qg4?! 22.Qg4 Nc3 23.Qf5 Be4 24.Qf2 Bg2 25.Qg2 Ne2 26.Kf2 Rg2 27.Kg2–+) 22.Bc3 Rg4–+) 19.Bf3= Ng4 20.Bg4 hg4 21.g3 Rh4? (better is 21...Bh6=) 22.gh4+– Qh4 23.Kg1?? (23.Kg2 Qh3 24.Kf2 g3 25.Ke2=) 23...Qg3 24.Kh1 Rh8# 0–1. cogit – annand, kurnik, 2012.

5.Be2 d6 6.0–0 e6 7.c4 Qe7 8.d4 Nd7 9.Nbd2 Rh7 10.a4 g5 11.Bd3 Bg7?? (better is 11...Rg7+/–) 12.Bh7+– g4 13.Ne1 h5 14.Bg8 0–0–0 15.Bh7 f5 16.Bg6 Qg5 17.Bf7 Qe7 18.Bh5 Rh8 19.Bg4! Qh4 20.Bh3 Rg8 21.Nef3 Qh6 22.Kh1 Bf6 23.Rb1 e5 24.d5 e4 25.Bf6 Nf6 26.Nd4 Nd5 27.cd5 Bd5 28.Nf5 Qg6 29.Ne7 (29.Ne7 Kb8 30.Ng6+–) 1–0. horacyad2010 – chupacabara, kurnik, 2011.

5.Be2 d6 6.c4 e6 7.d4 Qe7 8.Nbd2 Nd7 9.0–0 g5 10.a4 g4 11.Ne1 h5 12.f4 gf3 13.Bf3 0–0–0 14.Bb7 Kb7 15.a5 Bg7 16.ab6 cb6 17.c5 Nh6 (17...d5 18.Qa4 Nb8 19.cb6+–) 18.Nc4 dc5 19.bc5 bc5 20.Qb3 Ka7?? (better is 20...Kc7 21.Ra6 Ra8+–) 21.Na5 (21.Ra6! Ka6 22.Nf3 cd4 23.Ra1 Qa3 24.Ra3) 21...Qd6 (21...Ne5+–) 22.Qb7 1–0. horacyad2010 – poetico, kurnik, 2011.

5.Be2 e6 6.0–0 Nf6 7.a3 Qe7 8.c4 d6 9.Nc3 Nbd7 10.d4 g5 11.Qb3 g4 12.Nd2 h5 13.Rae1 h4 14.e4 Rg8 15.d5 Nh5 16.Nd1 Nf4 17.g3 hg3 18.fg3 Ne2 19.Re2 0–0–0 20.e5 de5 21.Be5 Ne5 22.Re5 Bg7 23.Ree1 Rh8 24.Nf2 Qg5 25.Nde4 Qh6 26.Ng4 Qh5 27.Qf3 f5 28.Ne5 Qf3 29.Nf3 fe4 30.Ng5 Rdf8 31.Ne6 Rf1 32.Rf1 Be5 33.Rf7 e3 34.Kg2 Kb8 35.Kf3 Rc8 36.Ke3 Bb2 37.a4 Ba3 38.b5 ab5 39.ab5 Bd6 40.g4 Bh2 41.g5 Be5 42.g6 Rg8 43.g7 Bc8 44.Rf8 Rg7 45.Ng7 Bg7 46.Rg8 Be5 47.Ke4 Bd6 48.Rd8 Kb7 0–1. elsh1403 – kaczapaya (1620), kurnik, 2012.

5.Be2 e6 6.c4 Nf6 7.a3 Be7 8.d4 d6 9.Nbd2 Ne4 10.0–0 Nd2 11.Qd2 Nd7 12.Rac1 White plans c5 12...Nf6 13.c5 dc5 14.dc5 bc5 15.bc5 Bc5?? (better is 15...Qd2 16.Nd2 Bc6=) 16.Rc5 Ne4 17.Qd8 Rd8 (17...Kd8 18.Rd1 Bd5+–) 18.Rc7 Bd5 19.Ba6 0–0 20.Ne5 Rb8 21.Bd4 Ra8 22.Bd3 Ng5 23.h3 Ra3 24.Bc5 Rfa8 25.Ba3 Ra3 26.Rc8# 1–0. ourang – kokosz2, kurnik, 2012.

5.Be2 Nf6 6.0–0 g5 7.Ne5 d6 8.Nf3 Bg7 9.Nd4 e5 10.Nf5 Bf8 11.c3 Ng8 12.Qb3 Ne7 13.Ne7 Qe7 14.d4 f6 15.Nd2 Nd7 16.de5 fe5 17.Bh5 Kd8 18.Rad1 Kc8 19.Bf3 h5 20.Bb7 Kb7 21.Qd5 Ka7 22.Ne4 Bg7 23.c4 Nf6 24.Nf6 Bf6 25.c5 Rad8 26.cb6 cb6 27.Rc1 Rc8 28.Rc6 Rc6 29.Qc6 g4 30.Rc1 Rb8 31.b5 a5 32.Ba3 Rd8 33.Qd5 Rd7?? 34.Rc6 Qd8 35.Rd6 Rd6 36.Bd6?? Be7–/+ 37.Qe5 Qd6 38.Qd6 Bd6 39.f3 gf3 40.gf3 Kb7 41.Kf2? Kc7 42.f4+= Be7 43.Kf3 Kd6 44.e4 Kc5 45.f5? Kb5 46.Kf4 Kc6 47.e5 Kd7 48.f6 Ke6?? 49.fe7+= Ke7 50.Kg5 Ke6?? 51.Kh5–/+ Ke5?? 52.Kg5 b5= 53.h4 Ke6 54.h5+= Kf7 55.Kh6?? Kg8 56.Kg5 b4 57.Kf4 a4 58.Ke4 b3 59.ab3 ab3 60.Kd3= b2 61.Kc2 Kg7 62.Kb2 Kh6 63.Kc3 Kh5 ½–½. elsh1403 – poetico, kurnik, 2011.

3.e3 Ba6

4.Ba6+= Na6 5.b5 (5.a3 c5 6.Qg4 Nh6+=) 5...Nc5 6.d4 (6.Nf3 a6=) 6...Ne4 (6...Na4 7.Ba3 a6 8.ba6=) 7.Nd2 (7.Qd3 d5=) 7...Nd6 (7...Nd2 8.Qd2 a6 9.ba6 Ra6 10.Nf3=) 8.c4 e6 9.a4 Nb7 (9...a6 10.Ngf3+=) 10.Ngf3 Bb4 11.0–0 Bd2 12.Qd2 Ne7 13.d5 ed5 14.Bg7 (14.cd5 0–0+/–) 14...Rg8+= 15.Bf6 dc4 16.Nd4 (better is 16.Ne5+=) 16...c6?? (better is 16...Rg6 17.Bh4 a6=) 17.Nf5!!+– Nf5 18.Bd8 Nd8 19.Rfd1 d5 20.bc6 Nc6 21.Qd5 Nfe7 22.Qd7 Kf8 23.Rac1 Kg7 24.Qg4 Kh8 25.Qc4 Rgc8 26.Qf7 Ne5 27.Qe7 Rc1 28.Qe5 Kg8 29.Rc1 Kf7 30.Qd5 Kg6 31.Qa8 a5 32.Rc6 Kf5 33.Rb6 Ke5 34.Qa5 Ke4 35.Rb4 Kd3 36.Qd5 Kc3 37.Rc4 Kb3 38.a5 h5 39.a6 h4 40.a7 Kb2 41.a8R h3 42.gh3 Kb3 43.Rcc8 Kb4 44.Qb7# (44.Qc4#) 1–0. ludice (1730) – 86154, kurnik, 2011. (=1.e3 b6 2.b4 Bb7 3.Bb2 Ba6)

4.Qf3 c6 5.Ba6 Na6 6.b5 cb5 7.Ne2 Nb4 8.Na3 a6 9.Bc3 Nc6 10.0–0 b4 11.Bb4 Nb4 12.c3 Nc6 13.Nd4 Nd4 14.cd4 g6 15.Nc4 Bg7 16.Rab1 b5 17.Ne5 Nf6 18.h3 0–0 19.Rfc1 d6 20.Nc6 Qd7 21.e4 Rfc8 22.d5 Ne8 23.Qg4 Qg4 24.hg4 h6 25.Ne7 Kh7 26.Nc8 Nf6 27.Nd6 Ng4 28.Nf7 Re8 29.Re1 Re7 30.Nd6 Ne5 31.f4 Nd3 32.Re3 Bd4 33.Rb3 Be3 34.de3 Nc5 35.Ra3 Ne4 36.Ne4 Re4 37.Kf2 g5 38.Ra6 gf4 39.ef4 Rf4 40.Ke3 Rg4 41.Kf3 Rb4 42.d6 Rd4 43.Ra7 Kg6 44.Ra6 b4 45.Ke3 Rd5 46.Ke4 Rd1 47.Ke5 Kf7 48.Ra7 Ke8 49.Ke6 Re1 50.Kd5 Rd1 51.Kc5 Rc1 52.Kb4 Rd1 53.Kc5 Rc1 54.Kb6 Rb1 55.Kc6 Rc1 56.Kd5 Rd1 57.Ke6 Re1 58.Kf6 Rf1 59.Kg6 Rg1 60.Kh6 Rg2 61.d7 Kd8 62.a4 Rd2 63.a5 Rd7 64.Rd7 Kd7 65.a6 Kc7 66.a7 Kb7 67.a8Q Ka8 ½–½. riditko – maniaa01, kurnik, 2012.

3.e3 Na6

4.a3 Rb8 5.Nf3 Nh6 6.c4 Ng4 7.d4 c5 8.h3 Nf2? (better 8...Nf6+=) 9.Kf2+– g6 (9...cb4 10.ab4 Nb4 11.Ra7+–) 10.b5 (10.dc5 f6 11.cb6 ab6+–) 10...Nc7 11.dc5 Rg8 12.cb6 ab6 13.Qd4 (13.Bd3 Rc8+–) 13...Ne6 14.Qh4 h6 15.Nbd2 Nc5 16.Be2 d5 (16...Ra8 17.Rhd1+–) 17.Rhd1 Na4 18.Be5 Rc8 19.Ne4! e6 (19...de4 20.Rd8 Pinning (20.Rd8 Deflection; 20.Rd8 Clearance)) 20.Nf6 (20.Nf6 Qf6 21.Bf6+–) 1–0. GuestWRJS – GuestTMDZ, freechess.org, 2017.

3.e3 c5

4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 d5 8.Nf3 Nd7 9.c4 e6 10.Be2 Bd6?? (10...Ngf6 11.0–0=) 11.Nc3 (better 11.Bg7 dc4 12.Bh8 Bf3 13.gf3+–) 11...Ngf6 12.0–0 0–0 (12...dc4 13.Bc4 Bf3 14.Qf3=) 13.d4 (13.cd5 Nd5 14.Nd5 Bd5=) 13...Qc7 14.h3 (14.cd5 Nd5 15.dc5 Nc5=+ (15...Qc5? 16.Ne4 Qb4 17.Nd6 Qd6 18.e4+–; 15...bc5?! 16.Ne4 Be7 17.Qc2=; 15...Bc5?! 16.Nd5 Bd5 17.Qb1=)) 14...Ra8 (14...dc4 15.dc5 Qc5 16.Bc4 Bf3 17.gf3 Qg5 18.Kh1–/+) 15.dc5 Nc5 16.Nd4 h6 (16...Rd8 17.cd5 Nd5 18.Nd5 Bd5=+ (18...ed5?! 19.Qc2+=)) 17.Bf3 (17.cd5 Nd5 18.Nd5 Bd5=) 17...Nce4 (better 17...dc4 18.Bb7 Qb7–/+) 18.Qb3?? (18.Ne4!? Bh2 19.Kh1 de4 20.Be2=+) 18...dc4 (better 18...Ra1 19.Nd1 Qc4 20.Be4 Ne4 21.Qc4 dc4–+) 19.Qc2–/+ Nc3 20.Bb7 (20.Bc3 Bf3 21.Nf3 Nd5–/+) 20...Qb7–+ 21.Qc3 Rc8 (better 21...Qd5!?–+) 22.Nc6=+ Rc6 23.bc6 Qc6 24.Rb1 Bf8 (24...b5 25.Qa5 b4 26.Bf6 gf6 27.Rd1=+) 25.Qb2 (25.Qe5 Nd7 26.Qh5 Be7=) 25...Nd5=+ 26.Qd4 (26.Qe5=+) 26...f6 (26...b5!?–/+) 27.e4= e5?? (27...Nf4 28.Qe3 Nd3–/+) 28.Qd5 Qd5 29.ed5 Bc5 30.Kf1 (30.Kf1 Kf7 31.Bc3+–; 30.Bc3!? Kf7 31.Bb4 Bd4+–) 1–0. RichardSommer (2090) – evaldas6 (1935), lichess.org, 2020.

4.b5 d5 5.Nf3 Nd7 6.c4 e6 7.cd5 ed5 8.Be2 Ngf6 9.0–0 Bd6 10.h3 (10.Nc3 0–0=) 10...0–0=+ 11.d3 (11.d4 c4=+) 11...Re8 (11...Qe7 12.Nc3=+) 12.Nbd2 (12.Nh4 a6 13.Nf5 Bc7=+) 12...Ne5 (12...Qe7 13.Re1=+) 13.d4 (13.Be5 Be5 14.Ne5 Re5=) 13...Nf3=+ 14.Bf3 Ne4 (14...a6 15.a4=) 15.Ne4 (15.dc5 Nc5 16.Be2 a6=) 15...de4 16.Be2 Qg5 (16...Bd5 17.dc5 bc5 18.f4 ef3 19.Bf3 Bf3 20.Qf3=) 17.Bc4 White prepares the advance d5 (17.dc5 Bc5 18.Bc4 a6=) 17...Rad8 (17...Bc8 18.Kh1 Be6=) 18.d5 (18.Qb3 Re7=) 18...Bc8 (18...Bb8 19.f4 ef3 20.Qf3 Bd5 21.Bd5 Qd5 22.Qg4–/+) 19.Kh1 (19.f4 ef3 20.Rf3=+) 19...f6 (19...Qh6 20.f4 Bh3 21.gh3 Qh3 22.Kg1 Qe3 23.Kg2 Bf4=) 20.g4?? (better 20.Qc2=) 20...f5–+ 21.f4 (better 21.Rg1 Qh4 22.Bf1 fg4 23.Rg4 Bg4 24.Qg4 Qg4 25.hg4–+) 21...ef3 22.Qf3 fg4 (better 22...Re3 23.Bc1 Rf3 24.Bg5 Rh3 25.Kg2 Rg3 26.Kh1–+) 23.Rg1? (23.Qf7 Kh8 24.Rac1 Re3 (24...gh3?! 25.Rg1 Bg4 26.Qg7 Qg7 27.Bg7 Kg7 28.Rg4 Kh8 29.e4=+) 25.Bg7 Qg7 26.Qg7 Kg7 27.hg4 Bg4–+) 23...gf3 (better 23...Re3!? 24.Rg4 Bg4 25.Qg4 Qg4 26.hg4 Rh3 27.Kg1 Rg3 28.Kh1–+) 24.Rg5 g6 25.Rag1 (25.Kg1 Re3 26.Kf2–+) 25...Bf5 (better 25...Bh3 26.Bf6 Rd7–+) 26.Rf5+– Re3 (26...Re4 27.Bb3 Re3 28.Bd1+–) 27.Rf6 f2 28.Rf2 Rh3 29.Kg2 Rh2 30.Kf1 Rf2 (30...Rf8 31.Rgg2 Rf2 32.Rf2 Rf2 33.Kf2+–) 31.Kf2 Rf8 32.Ke2 Rf4 33.Bb3 (33.Bd3 c4 34.Bc2 Kf8+–) 33...Rh4 (33...Kf7 34.Bc2+–) 34.Rg2 Re4 (34...Rf4 35.Bc2 Kf8 36.Rg3+–) 35.Kd3+– Rf4 36.Re2 c4? (better 36...Rf3 37.Kd2 Kf7+–) 37.Bc4 Bc5 (37...Rf3 38.Kd2 Rf4+–) 38.Kd2 (better 38.d6 Kf8 39.d7 Rf3 40.Kd2 Bb4 41.Kd1+–) 38...Kf8?? (38...Rc4 39.Re8 Kf7 40.Rb8–/+) 39.Kd3 h5?? (39...Kg8 40.d6 Kf8+–) 40.Bb3 (40.Rg2 Rf2 41.Rf2 Bf2+–) 40...g5 41.Kc2 (41.Be5 Rf7+–) 41...g4 0–1. GuestJKKR – BobchessIIII, freechess.org, 2017.

4.b5 d6 5.Nf3 (5.d4 cd4 6.ed4 e6=) 5...a6 (5...e5 6.Be2=) 6.a4 (6.ba6 Bc6+=) 6...Nf6 (6...d5+=) 7.c4 (7.ba6 Ba6 8.Ba6 Na6 9.Bf6 gf6+=) 7...g6 (7...e5 8.ba6 Na6 9.d4=+) 8.d3 (8.ba6 Na6 9.Bf6 ef6=) 8...Bg7 9.Nbd2 (9.Be2 0–0=) 9...d5 10.cd5 Bd5 11.e4 (11.d4 Nbd7=) 11...Bb7 12.Be2 (12.e5 Nd5=) 12...0–0 13.0–0 Qd7 14.Nc4 Qc7 (14...Qd8 15.a5 Nbd7 16.ba6 Ba6 17.ab6 Bc4 18.dc4 Qb6 19.Qc2+=) 15.Be5+= Qd8 16.Qc2 (16.a5 Nbd7 17.ba6 Ba6 18.ab6 Nb6+=) 16...Nbd7= 17.Bb2 (17.Bc3 Qc7=) 17...Rc8 (17...h6 18.ba6 Ra6 19.Rfb1+=) 18.h3 (18.Nfe5 Ne5 19.Be5 a5+=) 18...Bh6 (18...Ra8 19.Rfb1=) 19.Rfd1 Bf4 (19...Ra8 20.ba6 Ra6 21.Bf6 Nf6 22.Qb3+=) 20.Bf1 (20.ba6 Ba6 21.Rab1 Qc7+=) 20...Bb8 (20...Ra8 21.Re1+=) 21.Be2 Nh5 (21...Bf4!?=) 22.Qc3 (22.d4 Nf4+–) 22...f6 (22...Nhf6 23.Nfe5 Qc7 24.Qd2+=) 23.Qb3 Nf4 (23...Rf7 24.ba6 Ba6 25.d4+–) 24.Bf1 (24.Nb6 Kg7 25.Nd7 Ne2 26.Kf1 Qd7 27.Ke2+–) 24...Qc7? (24...Kg7 25.ba6 Ba6 26.d4 cd4 27.Rd4 (27.Nd4?! Qc7 28.g3 Bc4 29.Bc4 Qc4 30.gf4 Qb3 31.Nb3 Rfd8=) 27...Bc4 28.Bc4+–) 25.Nd6?? (25.ba6 Ba6 26.Nb6 c4 27.Nc4 Nc5+–) 25...Kg7? (better 25...Bd5! 26.ed5 Qd6 27.ba6 Qd5+=) 26.Nc8+– Bc8. GuestZJYV – GuestFGGB, freechess.org, 2016.

4.b5 Nf6= 5.f4 g6 6.Nf3 Bg7 7.c4 0–0 8.Be2 d5 9.cd5 Nd5 10.Bg7 Kg7 11.0–0 a6 12.Na3 ab5 13.Nb5 Nc6 14.Ne5 Ne5 15.fe5 Qb8 16.e6 fe6 (16...f5 17.Bc4+=) 17.Rf8= Qf8 18.Qb3 Qf6 19.Rf1 Qe5 20.Bf3 Ba6 21.d4 (better is 21.a4!?=) 21...Qe3–/+ 22.Qe3 Ne3 23.Ba8 Nf1 (worse is 23...Bb5 24.Rb1 Bc4 25.dc5 bc5 26.Re1+=) 24.dc5 bc5 (24...Bb5?! 25.cb6 Ba6 26.b7 Bb7 27.Bb7=) 25.a4 Ne3 26.Nc7 Bc4 (better is 26...Bc8!?–/+) 27.a5= Nd5 (better is 27...e5=) 28.Nd5?? (better is 28.Ne6 Kf6 29.Nc5+=) 28...ed5–+ (28...Bd5?? 29.Bd5 ed5 30.a6+–) 29.Bb7 Kf6 30.Kf2 Ke5 31.Ke3?? (better is 31.a6 Ba6! 32.Ba6–+) 31…Kd6 0–1. Perez Wertheim,R (2015) – Flores,N (1930), Buenos Aires ARG, 3rd Duchamp Open (j), 2013.

4.bc5 bc5 5.Nf3 Nc6 6.Bc4 (6.Na3 Rb8=) 6...Qc7 (6...Rb8 7.0–0=) 7.Nc3+= 0–0–0? (better is 7...Rb8+=) 8.Bf7+– Nh6 9.Bc4 e6 10.0–0 (better is 10.Bd3+–) 10...Bd6?? (better is 10...d5 11.Be2 a6+–) 11.Nb5 Qb8 12.Bg7 (12...Ng4 13.Nd6 Qd6 14.Bh8 Rh8 15.Be2+–) 1–0. Wall,Bill – SirDy, internet, 2005.

3.e3 c6

4.a4 a5 5.b5 cb5 6.ab5 (6.Bb5?? Bg2 7.Qg4 Bh1 8.Bg7 Nh6 9.Bh6 Bh6–+) 6...Nf6 7.Nf3 g6 (7...d5 8.Nc3=) 8.Be2 (8.g4 h6=) 8...Bg7= 9.0–0 0–0 10.c4 d6 11.d4 Nbd7 12.Nbd2 (12.Nc3 e5=) 12...Ne4 (12...Qc7 13.Qb3=) 13.Ne4 Be4 14.Ng5 Bb7 15.f4 Ra7 (15...Nf6 16.Bd3=) 16.Qc2+= Qa8 17.Bf3 (17.Bd3 d5+=) 17...h6 18.Bb7 Qb7 19.Nf3 Nf6 20.Nd2 Ng4 (20...Qd7 21.e4+=) 21.Rf3 (21.Qd3+=) 21...e5 (21...Qd7!?+=) 22.h3+– Nf6 23.de5 de5 24.Be5 Nd7 (24...Rd8 25.Bd4 Nh5 26.Bg7 Ng7 27.Ne4+–) 25.Bd4 Re8 (25...Rd8 26.f5 Ne5 27.Rf2+–) 26.f5+– g5? (better 26...Bd4 27.ed4 g5+–) 27.f6 Bh8 28.h4! Re6 (28...gh4 29.Qf5 Combination) 29.hg5 hg5 30.Rh3 Nf6 (30...Bf6 31.Rf1 a4 32.Qh7 Kf8 33.Qh6 Ke7 34.Bf6 Nf6+–) 31.Rh8! Kh8 32.Qf5 Kg7 (32...g4 33.Qg4 Kh7 34.Qf5 Kg8 35.Qg5 Kf8 36.Bf6 Rf6 37.Qf6+–) 33.Qg5 Kf8 34.Bf6 Ra8 (34...Rf6 35.Qf6 Kg8+–) 35.Qg7 Ke8 36.Qg8 Kd7 37.Qf7 Kc8 38.Qe6 Kb8 39.Be5 Ka7 40.c5! (40.c5 Rh8 41.Nc4 Rh1 42.Kh1 Qh7 43.Kg1 Qh1 44.Kh1 a4 45.Ra4 Kb7 46.c6) 1–0. GuestZSJP – GuestJXYG, freechess.org, 2020.

4.a4 d6 5.a5 b5 6.a6 (6.c4!? bc4 7.Bc4=) 6...Ba6 7.Ra5 Bb7 8.Ra3 a6 9.Rd3 e6 10.e4 Be7?? (10...Nf6!? 11.Re3–/+) 11.e5?? (better 11.Bg7 Bf6 12.Bh8 Bh8 13.Rg3+–) 11...d5–/+ 12.Rh3 (12.Rg3 Bb4 13.Rg7 Bf8–/+) 12...Nh6 (12...Bb4 13.Rg3 Bf8 14.Nf3–+) 13.Rh6 (better 13.c3!?–/+) 13...gh6–+ 14.Nf3 (14.Qg4 c5–+) 14...Rg8 (14...Bb4 15.c3 Be7 16.Ba3–+) 15.Nd4? (15.c3 c5 16.bc5 Bc5–+) 15...Nd7 (15...Bb4 16.Nf3–+) 16.Qh5 Rf8?? (16...Rg5!? 17.Qh6 Re5 18.Be2–+) 17.Qh6?? (better 17.Ne6 Qb6 18.Bd4=) 17...Ne5 18.Qh7 Ng6 (better 18...Bb4 19.Ne6 Qe7 20.Ng7 Kd8–+) 19.Nf3?? (better 19.Ne6 fe6 20.Qg6 Kd7 21.Bg7–/+) 19...Bf6–+ (19...Bb4?! 20.Bg7–+) 20.Bf6 Qf6 21.c3 (21.Ng5 Qe5 22.Kd1 Qg5–+) 21...Rh8 22.Ng5 (22.Qh8 Qh8 23.d4–+) 22...Rh7 23.Nh7 Qg7 24.Ng5 f6 (better 24...Qe5 25.Kd1 Qg5 26.Kc1–+) 25.Nf3 e5 (25...Nf4!? 26.Kd1–+) 26.Nh4 (26.d4–+) 26…Nf4 (26...Nf4 27.Kd1 Qg4 28.Kc1 Qh4–+) 0–1. atif_zubair – Esequibo_VENEZUELA, lichess.org, 2019.

4.c4 Nf6 5.Nf3=.

4.Ne2 d5 5.Ng3 f6 6.Bd3 e5 7.Qh5 g6 8.Bg6 Ke7 9.Bf5 Qe8 10.Qe2 Nd7 11.0–0 Nh6 12.Bh3 Kd6 13.f4 Bg7 14.fe5 fe5 15.d3 Rf8 16.e4 Rf1 17.Qf1 d4 18.Qe1 Qe7 19.Nd2 Rf8 20.Nc4 Kc7 21.Ba3 b5 22.Na5 Bc8 23.c4 a6 24.cb5 ab5 25.Nh5 Bh8 26.Ng3 Qf7 27.Rc1 Nb6 28.Rc6 Kb8 29.Rb6 Ka7 30.Rh6 Bh3 31.gh3 Bf6 32.Nf5 Rg8 33.Kh1 Bg5 34.Nc6 Kb6 35.Na5 Bh6 36.Qc1 Rg6 37.Qc2 Qc7 38.Qe2 Be3 39.Ne3 de3 40.Qe3 Ka6 41.Qe1 Qc2 42.Nb3 Qg2 0–1. 56ctx56 – comher, kurnik, 2012.

4.Nf3 a5 5.b5 cb5 6.Bb5 Bc6 7.a4 Bb5 8.ab5 Nf6 9.0–0 g6 (9...e6 10.c4+=) 10.h3 (10.Bf6!? ef6 11.Ra4+/–) 10...Bg7+= 11.Nc3 0–0 12.Ng5 h6 13.Nge4?? (better is 13.Nf3=) 13...Ne4–+ 14.Ne4 Bb2 15.Rb1 Bg7 16.f4 f5 17.Ng3 d6 18.h4 e5 19.h5 gh5 20.Nh5 e4 21.Ng7 Kg7 22.Qh5 Qf6 23.g4 Qg6 24.Qg6 Kg6 25.gf5 Kf5 26.Rf2 Rg8 27.Rg2 Rg2 28.Kg2 Nd7 29.Rh1 Kg6 30.Kg3 Rg8 31.Kg4 Kh7 32.Kf5 Rg2 33.Ke6 Nf8 34.Kd6 Rd2 35.Kc6 Rc2 36.Kb6 Rc4 37.Ka5 Rc3 38.b6 Re3 39.Rc1? Rb3 40.Ka6 e3 41.Rc7 White prepares the advance b7 41...Kg6 42.b7 e2 43.Re7 Rb7 44.Kb7+= Kf5 45.Re2 Kf4?? 46.Rf2+– Kg5 47.Rf8 h5 48.Kc6 h4 49.Kd5 Kg4 50.Ke4 h3 51.Rg8 Kh4 52.Kf4 h2 53.Rh8# 1–0. aleksandras19 – karlos42, kurnik, 2012.

4.Nf3 Na6 5.a3 c5 6.b5 Nc7 7.c4 e6 8.Nc3 (8.Be2 d5+=) 8...Nf6= 9.Be2 Qe7 (9...d5 10.d3=) 10.0–0+= g6 (10...d5 11.cd5 Ncd5 12.Rc1+=) 11.d4 Bg7 12.dc5 bc5 13.a4 0–0 14.a5 d5 15.a6 Bc8 16.Ne5 Bd7 17.Nd7 Qd7 18.Bf3 Rad8 19.Qb3 dc4 20.Qc4 Nfd5 21.Rfd1 Bc3+= 22.Bc3 Nb5 23.Ba5+/– Rc8 24.Bd5 ed5= 25.Rd5 Qc6 26.Rc1 Qa6 27.Be1 Qb6 28.Rc5 Nd6 29.Qc2 a5 30.Ba5+/– Rc5 31.Qc5 Qc5 32.Rc5 Ra8 33.Bc3 Ne4 34.Ra5 Rc8 35.Be1 Rc1 36.Ra8 Kg7 37.Kf1 Nd6 38.Ke2 Nf5 39.Ra3 Nh4 40.g3 Ng2 41.Bc3 Kh6 42.Kf3 Ne1+/– 43.Be1 Re1 44.Ra7 f5 45.h4 Rb1 46.Rf7 Rb4 47.Re7 Rb6 48.e4 fe4 49.Re4 Rf6 50.Rf4 Rc6 51.Kg2 g5 52.hg5 Kg5 53.Kh3 1–0. Fournier,Frederic (2085) – negrovf (1965), Active, 2004.

4.Nf3 Na6 5.a3 Nc7 6.Be2 f6 7.0–0 g6 8.c4 e5 9.d4 e4 10.Nfd2 f5 11.Qc2 d5 12.Nc3 White prepares the advance b5 12...Nf6 13.b5 cb5 14.Nb5 Nb5 15.cb5 Bd6 16.Qb3 Rc8 17.Rac1 0–0 18.Rc8 Bc8 19.Rc1 Be6 20.g3 Qd7 21.Rc6 Rc8 22.Qc2 Rc6 23.Qc6 Qc6 24.bc6 Bc7 25.a4 Bc8 26.Ba3 Kf7 27.Bb5 Ke6 28.Nb3 Ne8 29.Kg2 Nd6 30.f3 h5 31.Bd6 Bd6 32.fe4 fe4 33.a5 Bc7 34.ab6 ab6 35.Na1 g5 36.Nc2 Bd6 37.h3 Kf5 38.c7 Bc7 39.Nb4 Ke6?? 40.Nc6?? Kd6 41.Nb4 Bb7 42.g4 h4 43.Be8 Ke6 44.Kf2 Bg3 45.Ke2 Bd6 46.Nc6 Bc6 47.Bc6–/+ Bb4 48.Bb5 Kd6 49.Be8 Ba5 50.Bb5 Bb4 51.Ba4 Ba5 52.Bb5 Bb4 ½–½. ejdrzej (1680) – soarenicolae4 (1750), kurnik, 2012.

4.Nf3 Na6 5.a3 Nf6 6.c4 Nc7 7.d4 d5 8.c5 bc5 9.dc5 g6 10.Nbd2 Bg7 11.Nb3 0–0 12.Na5 Qc8 13.Nd4 Ne6 14.Be2 (14.Ne6 fe6 15.Be5 Ne4 16.Bg7 Nf2=) 14...Rb8 (14...Nd4 15.ed4 Ba6 16.Ba6 Qa6 17.Qe2=) 15.0–0 Ne4 16.Rb1 Nd4 17.Bd4 e5 18.Ba1 Ba6 19.Re1 (19.b5!? Bb5 20.Bb5 Rb5 21.Rb5 cb5 22.Qd5+/–) 19...Be2= 20.Re2 f5 21.Qb3 f4 (21...Qc7!?+=) 22.ef4+= Rf4 23.f3 Ng5? 24.Be5+– Be5 25.Re5 Nf7 26.Re6?? Qe6–+ 27.Qa4 Ne5 28.Kf2 Qf5 29.Re1 Nd3 30.Kf1 Ne1 31.Nc6 Qd3 32.Kf2 Qd2 33.Kg3 Qg2 34.Kf4 Rf8 35.Ke5–+ Nf3 36.Kd6 Qh2 37.Kd5 Qh5 38.Kc4 Nd2 39.Kb5 Qd5 40.Qa7 Qc4 41.Ka5 Nb3 42.Kb6 Qb5 43.Kc7 Rf7–+ (43...Rf7 44.Kd6 Qd3 45.Nd4 Ra7 46.Kc6 Nd4 47.Kd6 Qf5 48.b5 Qe6#) 0–1. carocan (1780) – frozenspell (1825), kurnik, 2011.

4.Nf3 Qc7 5.a4 d6 6.Be2 Nd7 7.Nc3 0–0–0 8.b5 c5 9.a5 e5 10.ab6 ab6 11.Bc4 f6 12.Bd5 g5 13.Bb7 Qb7 14.d4 h5 15.de5 Ne5 16.Ne5 Qg2 17.Qf3 Qf3 18.Nf3 h4 19.Nd5 Kb7 20.Nf6 Nf6 21.Bf6 1–0. j1a9n55 – 2waldemaro, kurnik, 2012.

4.Nf3 d5 5.Be2 Nd7 6.0–0 e6 7.h3 Bb4 8.Bg7 Nh6 9.Bh8 f6 10.Nd4 Kf7 11.Bd3 Qh8 12.Qh5 Ke7 13.Qh6 Rg8 14.Nc3 Rg6 15.Qh4 Ne5 16.Nce2 c5 17.Nb3 Nf3 0–1. joaquimbage – belloecattivo, kurnik, 2012.

4.Nf3 e6 (--> 3.e3 e6 4.Nf3 c6).

4.Nf3 Nf6 5.a3 e6 6.c4 Be7 7.Be2 c5 8.b5 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 0–0 12.Nc3 Ne4 (12...d5 13.d4=) 13.Ne4 Be4 14.0–0 Bg6 15.d4 cd4 16.Nd4 Bc5 17.Qc2?? (better is 17.Nb3 Bb4 18.Bb2+=) 17…Bc2–+ (17...Bc2 18.Nc2 Qc7–+) 0–1. rosas – kakajer, kurnik, 2012.

4.Nf3 d6

5.c4 Nd7 6.d4 Ngf6 7.Nc3 g6 8.Bd3 Bg7 9.0–0 0–0 10.Re1 d5 (10...e5 11.Qb3+=) 11.cd5 cd5 12.Qb3 e6 13.Rac1 Rb8 14.Nb5 a5 (14...a6!? 15.Nd6 b5 16.Nb7 Rb7+=) 15.ba5+– ba5 16.Ba3 Re8 (16...Ne4 17.Bf8 Bf8 18.a4+–) 17.Bd6 Ra8 (17...a4 18.Qd1+–) 18.Nc7 Ba6?? (18...Ra7+–) 19.Ba6 Ra6 20.Na6 Nb6 (20...a4 21.Qa4 Nb6+–) 21.Bc7 a4 22.Qb6 Qd7 23.Ne5 Qe7 24.Bd6 Qd8 25.Rc7 Bf8 26.Nf7 Qa8 27.Bf8 Rf8 28.Qe6 Kg7 29.Ng5 Kh6 30.Qh3 Kg5 (30...Nh5 31.Rh7 Kg5 32.f4 Kf6 33.Qh4 Ke6 34.Qe7 Kf5 35.Qe5 Kg4 36.Qg5) 31.f4 1–0. Pereira – Sengu, internet, 2020.

5.Bc4 Nd7 6.Ng5 (6.Bf7 Kf7 7.Ng5 Kg6+/–) 6...e6 (better is 6...d5!? 7.Bd3 Ngf6=) 7.Qh5+/– Qe7 8.Be6 Ngf6? (better is 8...Nh6 9.Bd7 Qd7+/–) 9.Bf7 Kd8 10.Qf3 h6 11.Ne6 Kc8 12.Bf6 gf6 13.Qh5 Ne5 14.Nf8 Rf8 15.Qf5 Kc7 16.Bb3 c5 17.bc5 (17.0–0 c4 18.Ba4 Rg8+/–) 17...dc5? (better is 17...Bg2!? 18.cb6 ab6=) 18.0–0+/– Rad8 19.e4 Bc8 20.Qf4 Kb7 21.Nc3 Be6? 22.Nd5 Bd5 23.Bd5 Ka6 24.Rab1 f5 25.Qe3 f4 26.Qa3 1–0. elsh1403 (1675) – arlind60, kurnik, 2011.

5.d4 Nd7 6.c4 Ngf6 7.Be2 g6 8.Nbd2 Bg7 9.0–0 0–0 10.a4 c5 11.b5 cd4 12.ed4 d5 13.Rc1 dc4 14.Nc4 a6 15.Nce5 Ne5 16.Ne5 ab5 17.Bb5 Qd5 18.f3 Ba6 19.Bc6 Qd6 20.Re1 Rac8 21.Bb5 Rc1 22.Qc1 Bb5 23.ab5 Nd5 24.Nc6 Nb4?? 25.Ba3 Nd3?? 26.Qc3 Qf6 27.Qd3 Re8 28.Be7 Qf4 29.Bb4 Re1 30.Be1 Qc1 31.Qd2 Qc4 32.Qb4 Bd4 33.Nd4 (33.Nd4 Qd5 34.Nc6+–) 1–0. ourang – artus48, kurnik, 2012.

5.Be2 Qc7 6.0–0 Nd7 7.h3 0–0–0 (7...e5 8.c4=) 8.a4 e6 9.c4 Be7? (9...c5 10.b5+/–) 10.d4?? (better is 10.Bg7 Bf6 11.Bh8 Bh8 12.Nc3+–) 10...h5 11.Nc3 f5 (better is 11...g5!?+=) 12.a5+– Rh7 13.ab6 ab6 14.b5 g5? 15.bc6 Bc6 16.d5 ed5 17.cd5 Bb7 18.Nb5 Qc5 19.Rc1 g4 20.Rc5 dc5 21.Ne5 gh3 22.Nd7 hg2 23.Kg2 Kd7 24.Bf3 h4 25.Kh2 Nf6 26.Rg1 Kc8 27.d6 Ne4 28.Be5 Nf2 29.Bb7 Kb7 30.Qf3 Kb8 31.d7 (31.d7 Bd6 32.Bd6; 31.de7 Kc8 32.Qc6) 1–0. horacyad2010 – borin, kurnik, 2011.

5.Be2 e6 6.0–0 Nf6 7.c4 Be7 8.d4 0–0 9.a4 Nbd7 10.Nc3 Qc7 11.Qb3 a6 12.Rfc1 Rfc8 13.a5 b5 (better is 13...ba5!? 14.ba5 Rcb8=) 14.cb5+/– ab5 15.Nb5! Ba6?? (15...cb5 16.Rc7 Pinning (16.Rc7 Deflection; 16.Rc7 Clearance)) 16.Nc7+– (16.Nc7 Rc7 17.Ba6 Ra6 18.b5+–) 1–0. elsh1403 – hankok16, kurnik, 2011.

3.e3 Nc6

4.a3 a6 5.Nf3 b5 6.Be2 Na7. septika – xorb, ChessWorld.net, 2011.

4.a3 d5 5.Nf3+= e6 6.d4 Nce7 (6...Nf6 7.c4+=) 7.Nc3 (7.Bd3 a5+=) 7...Nf6= 8.Bd3 Ne4 9.Ne4?? (better is 9.0–0+=) 9...de4–+ 10.Bb5 c6 11.Bc6 (11.Be2 ef3 12.Bf3 a5–+) 11...Bc6 (11...Nc6 12.Nd2–+) 12.Ne5 Bb7 (12...Ba4 13.Qh5 Ng6 14.Ng6 fg6 15.Qe2–+) 13.Qh5 (13.c4 Nc6–+) 13...g6 14.Qg4 (better is 14.Qe2 a6 15.f4–+) 14...Nc6?? (better is 14...Rc8!? 15.Qe2 f6 16.Qb5 Nc6 17.Nc6 Bc6 18.Qa6–+) 15.Qe4?? (better is 15.Nc6 Bc6 16.d5+/–) 15...Qc7 16.Nc6 Bc6 17.d5 Bd5 18.Qd4 Bg2 19.Rg1=+ Bf3 20.Qh8?? 0–0–0 21.Qe5 Qc2 22.Rc1?? Rd1 23.Rd1 Qd1# 0–1. Nautiluschess – jdducky, ICS blitz, 2001.

4.a3 d5 5.Nf3 Nf6 6.c4 e6 7.cd5 Nd5 8.Nc3 Nc3 9.dc3 Qf6 10.Qc2 Bd6 11.Be2 0–0 12.0–0–0 Rfe8 13.c4 e5 14.h3 a5 15.b5 Na7 16.a4 Bb4 (16...c6 17.Bd3 Kh8 18.Be4+= (worse is 18.Bh7 g6–/+)) 17.Rhg1 (17.Bd3 Bf3 18.gf3 Qh6+= (18...Qf3? 19.Bh7 Kh8 20.Be4+–)) 17...Re7 (17...h6 18.Bd3 Bd6 19.Bh7 Kh8 20.Be4=) 18.h4 (18.Bd3!? Qh6 19.Ne5+=) 18...c6 19.Ng5 Qf2?? (better is 19...Qh6+=) 20.Qh7 Kf8 21.Qh8 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.a3 d6 5.Nf3 e5 6.d4 Qf6 (better is 6...e4!? 7.Nfd2 Nf6+=) 7.b5+/– Nce7 8.de5 de5 9.Ne5 Qg5?? (better is 9...Rd8 10.Nd2 Qe6+/–) 10.Qd7 1–0. Fournier,Frederic (1985) – phil1904 (1745), jeu.europe–echecs.com, 2013.

4.a3 e5 5.Nf3 e4 6.Ng1=.

4.a3 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7).

4.a3 g6?? 5.Bh8+– Nh6 6.Bc4 (6.Bb2 Nf5+–) 6...d5 (6...Ne5 7.Be5 Bg2 8.Bd5 Bd5 9.Nf3+–) 7.Bb3 (better 7.Bb5!? f6 8.c4 Nf7+–) 7...f6 8.Qf3 (8.c4 Nb8 9.cd5 Nf7 10.Ba4 Nd7+–) 8...Nf7 (8...Ne5 9.Qh3+–) 9.Nh3 (better 9.Bf6 ef6 10.Qd5+–) 9...e6?? (9...Nce5 10.Qe2 Nh8+–) 10.Bf6 Ne7 11.0–0 Qd6 12.Nc3 c6 (12...a5 13.Nf4 c6 14.Nfe2+–) 13.Rae1 (13.e4 a5+–) 13...Nf5 14.e4 de4 (14...e5 15.Be5 Ne5 16.ef5+–) 15.Qe4 (better 15.Ne4 Qc7 16.Be6 N7h6+–) 15...Nd4 (15...Nd8 16.Ng5 Be7 17.Nh7+–) 16.Nf4 (better 16.Bd4 Nd8 17.Be6 Ne6+–) 16...Nb3 17.cb3 (better 17.Nb5 Qd7 18.Ne6 Ne5 19.Nbc7 Kf7 20.Be5 Nd2 21.Qf4 Kg8 22.Na8 Qe6+–) 17...Be7 (17...e5 18.Be5 Ne5 19.d4+–) 18.Be7 (better 18.Qe6 Qe6 19.Re6 Bc8 20.Re7 Kf8+–) 18...Ke7 19.Ne6 Ne5 (19...Kd7 20.Qh4 Re8 21.Ne4 Qe6 22.Nf6 Kc8 23.Re6 Re6 24.Qg4+–) 20.f4 (better 20.Qe5 Qe5 21.Re5 Kd7+–) 20...Qe6 21.fe5 Qb3 (21...Ke8+–) 22.Qf4 (22.e6 h5 23.Rf7 Ke8 24.Qd4 Qc3 25.Qd7) 22...Rf8 23.Qf8 Ke6 (23...Kd7 24.Qd6 Ke8 25.Rf8) 24.Qg8 (24.Qd6) 24...Kd7 25.Qb3 (25.Qg7 Qf7 26.Rf7 Ke6 27.Qf6) 25...b5 (25...Kc7 26.Qf7 Kb8 27.Qe8 Bc8 28.Rf8 a6 29.Qc8 Ka7 30.Qd7) 26.Rf7 Kc8 27.Qe6 Kb8 28.Qd6 Ka8 29.Qd8 Bc8 30.Qc8 1–0. Crusader Rabbit (1685) – rocketman1, ChessWorld.net, 2020.

4.a3 Nh6 5.Nf3+=.

4.b5 e6? 5.bc6 Bc6 6.Nf3 +–.

4.c3 e5=.

4.Nf3 Nb4 5.a3 Nc6 6.Be2 e6 7.0–0 d5 8.d3 Bd6?? (better is 8...Nf6–/+) 9.Bg7+– Be5 (9...Nh6 10.Bh8 (10.Bh6?! Qf6=) 10...f6 11.e4+–) 10.Ne5 Ne5 11.Bh8 f6 12.Bh5 Kd7 13.d4 (13.e4 Qf8 14.d4 Ne7 15.de5 Qh8 16.ed5 ed5 17.ef6 Qf6 18.Bg4 Ke8+–) 13...Nc4 14.Nd2 Nh6 15.Bg7 Nf5 16.Bf6! Qf6 17.Bf3 Ncd6 18.c4! Rg8 19.Qa4 Bc6 20.Qa7?? Nh4 21.cd5 Bd5?? 22.Bd5+– ed5 23.Qa4 b5 24.Qd1?? Rg2–/+ 25.Kh1 Rf2?? 26.Qg4+– Rf5 27.Rf5 Nhf5+/– 28.Rf1 Qe6 29.Rf3 Kc6 30.Nf1 h5 31.Qf4 Qg6 32.Ng3 Ng3 33.Qg3 Qb1 34.Qg1 Qe4 35.Kg2 Nf5 36.Qc1 Kd6? 37.Qc5+/– Kd7 38.Kf2 Qh4 39.Ke2 Qh2 40.Kd3 Nd6 41.Rf7?? Nf7–+ 42.Qd5 Ke7 43.Qc5? Kf6 44.Qe5?? Ne5 45.de5 Qe5 46.Ke2 h4 47.Kf3 If White now would get h3 in, he might survive 47...h3 48.Kf2 h2 49.Kf3 h1Q 50.Kg4 Qg5 (50...Qhh5) 0–1. Fournier,Frederic (1685) – soylaleche (1625), Active (5/0), 2005.

4.Nf3 d6 5.c4 (5.b5 Na5+=) 5...e5 (5...Nb4!? 6.Qa4 Nc6=) 6.b5+= Nce7 7.Be2 g6 (7...a6 8.0–0+=) 8.d4+– e4 9.d5 (better 9.Nfd2 d5 10.0–0+–) 9...f6? (better 9...ef3 10.Bh8 fe2 11.Qe2 Qd7=) 10.Nd4 Bg7?? (10...Nf5+–) 11.Ne6 Qd7 12.Ng7 Kf7 13.Ne6 Bc8 (13...a6 14.ba6 Ba6 15.Qd4+–) 14.Qd4 (better 14.Bg4 Nf5 15.Bf5 gf5 16.Qh5 Ke7+–) 14...Qe8 (14...a6+–) 15.Nc7 Qd7 16.Na8 Qb7 (16...Nf5 17.Qe4 Qb7 18.Nb6 Qb6 19.Qd3+–) 17.Qe4 (17.Nd2!? Nf5 18.Qc3 Ng7+–) 17...Qa8 18.Bg4 (better 18.Qf4 Qb8+–) 18...f5 (18...Bg4 19.Qg4 Qc8 20.Qf4+–) 19.Qf4 Nf6 20.Qd6 (20.Bf6 Kf6 21.Qd4 Kf7 22.Qh8 fg4+–) 20...Ng4 (20...Ne4 21.Qe5 Rd8 22.Bf3+–) 21.Bh8 a6 22.h3 Nf2 23.Kf2 ab5 24.Qf6 Ke8 25.d6 Kd7 26.Qe7 Kc6 27.Qc7 1–0. sirgeshdb (1765) – MaitresseMadeline (1685), lichess.org, 2020.

4.Nf3 e6 (--> 3.e3 e6 4.Nf3 Nc6).

4.b5 Na5

5.c4 Nc4!? 6.Bd4 a6 7.ba6 Ba6–/+.

5.c4 Nc4!? 6.Bd4 Nd6–/+.

5.c4 d5 6.cd5 Bd5 7.Nf3 Bb7 8.Nc3 e6 9.Be2 Qd7 (9...a6 10.0–0+=) 10.0–0 0–0–0 (10...Nf6 11.d4+=) 11.Nd4 (11.d4 Kb8+–) 11...f6 (11...Nf6 12.Rc1+=) 12.Bf3 (12.d3 Kb8+–) 12...Kb8 (12...Bc5 13.Nb3 Nc4 14.Nc5 bc5 15.Bc1+=) 13.Bb7+– Kb7 14.Qf3 Kb8 15.Ne4 (15.d3!?+–) 15...Ne7 (15...e5 16.Nc6 Nc6 17.bc6 Qc6 18.Rfc1=+) 16.Rfc1 (16.Qh3 Nc4 17.Rab1 e5+=) 16...Nd5 (16...e5!? 17.Nb3 Qb5 18.Na5 Qa5=+ (18...Qb2?? 19.Nd6 ba5 20.Rab1 Rd6 21.Rb2 Rb6 22.Rbc2+–)) 17.Nc6 Nc6 18.Rc6 (18.bc6!? Qe8 19.Qe2+=) 18...f5 19.Nc3 Nc3 (better 19...Nb4 20.Rc4 Qd3=+ (20...Qd2?? 21.Rd1+–)) 20.Bc3+– (20.Rc3?! Qb5 21.Rc2 Qd5=; 20.dc3? Qd2 21.Re6 Qb2–+) 20...Rg8 (20...Qd5 21.Qd5 Rd5 22.a4+=) 21.Rc1 (21.Be5 Rc8+–) 21...Bd6 (21...Ba3 22.Re1+–) 22.a4 g5 23.a5 g4 24.Qe2 e5 25.ab6 cb6 26.Qc4 Rc8? (better 26...Rge8!?+–) 27.Qd5+– Rc6 (better 27...Rgd8 28.Be5 Rc6 29.bc6 Qc7 30.Bd6 Rd6 31.Qg8 Rd8+–) 28.bc6 The mate threat is cxd7 (worse 28.Qc6 Qc6 29.bc6 e4–/+; 28.Qg8?! Rc8 29.Qb3 e4=) 28...Qc7 (28...Qd8 29.Be5 Be5 30.Qe5 Qc7 31.Qf5 h5+–) 29.Ra1 (better 29.Qg8 Qc8 30.c7 Bc7 31.Qc8 Kc8 32.Be5+–) 29...Rd8 30.g3 (30.Qe6 Rf8+–) 30...f4+= 31.Qg2 (better 31.Qe6!?+=) 31...f3=+ 32.Qf1 e4 (better 32...Qc6!? 33.Qa6 Qd7=+) 33.Qc4+= Rc8 (33...Re8!?+=) 34.Qe4+– Qc6 (34...h5!?+–) 35.Qg4+– Bc5 (35...Re8 36.Qf5+–) 36.Qg7 (36.Qf5 Rc7+–) 36...Rc7 37.Qg8 Kb7 38.Qc4 Qd7 39.Qa6 Kb8 40.Be5 Threatening mate: Qxa7 40...Bd6 41.Bd6 Qd6 42.Qa7?? (better 42.d4+–) 42...Ra7 43.Ra7 (43.Re1 Qd7 44.Rc1 Qh3 45.Rc8 Kc8 46.d4 Ra1) 43...Ka7 44.h4 Ka6 (44...Qd2 45.Kh2 Qf2 46.Kh3 h5 47.g4 Qg2) 45.g4 (45.d3 Qb4 46.Kh2 Qe1 47.Kh3 h5 48.g4 Qg1 49.gh5 Qg2) 45...Qd3 (45...Qd2 46.h5 Qe1 47.Kh2 Qf2 48.Kh3 Qg2 49.Kh4 h6 50.g5 hg5) 46.Kh2–+ Qd2 (better 46...b5 47.h5 b4 48.g5–+) 47.Kg3 Qe2 (47...b5 48.g5 b4–+) 48.Kf4 (48.g5–+) 48...Qf2 49.Kg5 Qe3 50.Kf6 (50.Kf5 f2 51.Kf6 f1Q 52.Kg7 Qe7 53.Kh6 Qf4 54.Kh5 Qef7) 50...Qf4 (50...f2 51.Kf7 f1Q 52.Kg7 Qe7 53.Kh6 Qf4 54.Kh5 Qef7) 51.Kg7 Qg4 52.Kh7 (52.Kf7 f2 53.Kf6 f1Q 54.Ke7 Qe4 55.Kd6 Qfd3 56.Kc7 Qb7) 52…Qh4 (52...Qh4 53.Kg7 f2 54.Kf7 f1Q 55.Ke6 Qe4 56.Kd6 Qfd3 57.Kc7 Qb7; 52...f2 53.h5 Qh5 54.Kg7 f1Q 55.Kg8 Qff7) 0–1. RichardSommer (2075) – rapidfire23 (1980), lichess.org, 2020.

5.Nf3 d6 6.c4 a6 7.d4+=.

5.Nf3 d6 6.c4 e5 7.Nc3 (7.Be2 Nf6+=) 7...c6 (7...a6 8.ba6 Ba6 9.Qa4 c6 10.d4+=) 8.d4+= ed4 9.Nd4 (9.Qd4 a6+=) 9...cb5 (9...Nf6 10.bc6 Nc6 11.Nd5+=) 10.cb5 a6? (better is 10...Nf6+=) 11.ba6+– Ra6?? (11...Bc8+–) 12.Qa4 Qd7 13.Bb5 Bc6 (13...Nc6 14.Qa6 Ba6 15.Bc6 Qc6 16.Nc6 Bb7+–) 14.Nc6 (14...Nc6 15.Qa6+–) 1–0. Wall,Bill – Guest3902, internet, 2003.

5.Nf3 d6 6.Be2 e5 7.0–0 Nf6 8.c4 (8.Bc3 a6=) 8...g6 (8...a6 9.d4 e4 10.Nfd2=) 9.d3 (9.d4 ed4 10.Qd4 Bg7+–) 9...Bg7 10.Nbd2 (10.d4 ed4 11.ed4 0–0+=) 10...0–0 (10...a6 11.d4+=) 11.e4 (11.Nb3 Nb3 12.ab3 a6+=) 11...a6 12.a4 (12.Qc2 Qd7 13.d4 ed4 14.Bd4 Rfe8=) 12...ab5 (12...Nd7 13.Re1=) 13.ab5+= c6 (13...Nd7 14.Bc3=) 14.h3 (14.bc6 Bc6 15.Qc2 b5+=) 14...Nd7 (14...cb5 15.cb5 Re8 16.Qb1=) 15.Qc2 (better 15.bc6 Nc6 16.Ra8 Ba8 17.Qc2=) 15...d5? (15...cb5 16.cb5 f5 17.Rfc1=) 16.cd5 (better 16.bc6 Bc6 17.ed5+–) 16...cd5= 17.ed5 (17.d4 ed4 18.Nd4 Rc8=) 17...Bd5 18.Ne4 (18.d4 Rc8 19.Qb1 Bf3 20.Nf3 Nb3=) 18...Bb3 (18...f6 19.Nc3 Rc8 20.Qd1=) 19.Qd2 Rc8 (19...f5 20.Nc3=) 20.Rfc1 (better 20.Bc3=) 20...Qe7? (20...Rc1 21.Qc1 f5 22.Ned2=) 21.Rc8 (21.Ba3 Rc1 22.Qc1+– (22.Bc1?! Rc8=; 22.Rc1?? Qa3 23.Rc7 Nf6–+)) 21...Rc8= 22.Rc1 Rc1 (22...Ra8 23.Qg5 Qg5 24.Nfg5=) 23.Qc1 Qb4 (23...h6!?=) 24.Ba3 (24.Qc8 Nf8 25.Be5 Be6+–) 24...Qb5 25.Qc8 Nf8?? (better 25...Bf8 26.Qe8 Qc6 27.Ne5 Qe6 28.Qe6 fe6 29.Nd7 Ba3 30.Nb6 Bc2+–) 26.Nf6+– Kh8 27.Bf8 Bf6 (27...Be6 28.Ng5 Qc6+–) 28.Bh6 (28.Bh6 Bd8 29.Qd8 Qe8 30.Qe8; 28.Be7 Qe8 29.Qe8 Kg7 30.Qf8) 1–0. GuestRDGY – GuestSCJY, freechess.org, 2016.

5.Nf3 d6 6.Be2 e6 7.0–0 Nf6 8.Nc3 Be7 9.Rb1 0–0 10.Bd3 c6 11.a4 c5 12.Ne2?? (12.Be2 d5=) 12...h6?? (better 12...Bf3 13.gf3 c4–+) 13.c4 (13.Ng3 c4 14.Be2 a6=) 13...e5 14.Qc2? (14.Ng3=+) 14...g6?? (better 14...e4 15.Be4 Be4–+) 15.Bg6 (15.e4 Nd7+=) 15...fg6 (better 15...Bf3!? 16.gf3 fg6 17.Qg6 Kh8 18.Qh6 Nh7=+) 16.Qg6= Kh8 17.Qh6 Nh7 18.Ne5? (18.Nf4 Rf6 19.Ng6 Kg8 20.Ng5 (20.Ne7? Qe7 21.Qh5 Bf3 22.gf3 Nc4–+) 20...Ng5 21.Ne7 (21.Qg5 Kf7 22.f4 Rg6 23.fe5 Kg7 24.ed6 Bf6 25.Bf6 Qf6 26.Qf6 Rf6–+) 21...Qe7 22.Qg5 Kf7 23.f4–/+) 18...de5–/+ 19.Be5 (19.Nf4 Rf5 20.Qe6 Rg5 21.Be5 Bf6–/+) 19...Bf6–+ 20.f4?? (better 20.Nf4 Be4 21.d3 Be5 22.de4 Bf4 23.ef4–+) 20...Be5 (20...Qd2 21.Qh5 Qe3 22.Kh1–+) 21.fe5 Nc4 (better 21...Qd2!? 22.Rfe1–+) 22.Nf4 Rf4 (22...Ne5!? 23.Qh5 Re8 24.Rbd1–+) 23.Rf4 Qg5?? (better 23...Qd2 24.Rg4 Qe3 25.Qe3 Ne3–+) 24.Qg5+– Ng5 25.Rc4 Rg8 (25...Be4 26.Rd1 Bd3+–) 26.Kf2?? (26.Rh4 Kg7+–) 26...Ne6?? (better 26...Ne4 27.Re4 Be4=) 27.Rh4+– Kg7 28.Rf1 (28.Rg4 Kf7 29.Rg8 Kg8+–) 28...Rf8 29.Ke2 Rf1 30.Kf1 Bc8 31.h3 Bd7 32.Kf2 Be8 33.Kg3 Bg6 34.e4 (better 34.Rg4!? Nc7+–) 34...Nd4 35.Kf2 (better 35.Rg4+–) 35...Nc2? (better 35...Bf7+–) 36.Rf4 (36.Rg4 Nd4+–) 36...Na3 (36...Nb4 37.Ke3 Bf7 38.Rf6+–) 37.e6 Nc4 38.Ke2 Ne5 39.g4 Nc4 (39...Be8 40.g5+–) 40.Kd3 Ne5 41.Kc2 (41.Kc2 Be8 42.g5+–; 41.Kc3 Be8+–) 1–0. aravind555 – petr_kurlik, lichess.org, 2019.

5.Nf3 e6 6.a4 a6 7.c4 c6 8.Nc3 (8.Be2 Nf6=) 8...cb5 (8...Nf6 9.Be2=) 9.ab5+= ab5 10.Nb5 Ne7?? (better 10...Nf6+=) 11.Nd6 1–0. Janek – Vassileos, internet free game, 2017.

5.Nf3 e6 6.c4 d5 7.cd5+= Bd5 8.Nc3 Bc4 (8...Bb7 9.Rc1+=) 9.d3 Bd5 10.e4 (10.Be2 a6+–) 10...Bb7+= 11.Be2 Bb4 (11...a6 12.ba6 Ba6 13.d4+=) 12.a3 Bc3 (12...Be7 13.Qc2+=) 13.Bc3+– Ne7 14.0–0 0–0 15.Qc2 c6 (15...a6 16.Qb2 f6 17.Qa2+=) 16.Qb2 cb5? (better 16...f6+–) 17.Bg7+– Re8 (17...a6 18.a4+–) 18.Bh8 (18.Bh8 e5 19.Ne5+– (worse 19.Qe5 Nf5 20.Qf5 Bc8+–; 19.Be5?! Ng6+–)) 1–0. GuestFNBV – GuestYCats, freechess.org, 2017.

5.Nf3 e6 6.Be2 a6 7.a4 (7.0–0 ab5 8.Bb5 Nf6=) 7...Nf6 8.0–0 Bb4 9.c3 Bc5 10.Ne1 (10.Ba3 Ba3 11.Na3 0–0=) 10...h6 (10...0–0 11.Nd3 Be7 12.Nb4=+) 11.Bf3 (11.Nd3 Be7=) 11...ab5 (11...Bf3 12.Nf3 (< 12.Qf3 Nb3–+) 12...Nc4 13.Qb3=) 12.ab5 c6 (12...Bf3 13.Qf3 c6 14.d4=) 13.bc6 (13.d4 Be7+=) 13...Nc6 (13...dc6 14.d3=) 14.d4 Bd6 15.Nc2 (15.Ra8!? Qa8 16.c4+=) 15...Ra1= 16.Ba1 0–0 17.Nd2 (17.e4!? Ba6 18.Be2 Be2 19.Qe2=) 17...Qc7=+ 18.e4 (18.h3=+) 18...e5 (better is 18...Bh2!? 19.Kh1 Bf4–/+) 19.Nc4 Ba6 (better is 19...Ra8=) 20.Be2?? (20.Nd6 Bf1 21.de5 Bg2 22.Bg2 Ne5 23.c4 Nc4 24.Nc4 Qc4 25.Bf6 gf6 26.Ne3+–) 20...Bc4–/+ 21.Bc4 Ne4 (21...ed4 22.Bd3–/+) 22.Bd5 Nf6–/+ 23.Re1 Nd5 24.c4?? Ndb4 25.Nb4 Bb4 26.Re2 ed4 27.Bd4 Nd4 28.Qd4 b5! 29.g3 bc4 30.Rc2 Rc8 31.Qb2 Rb8 32.Qd4 c3 33.Kg2 Qc6 34.Kg1 d5 35.Kf1 Qc4 36.Qc4 dc4 37.Ke1 Rd8 (38.Ke2 Rd2 39.Rd2 cd2–+) 0–1. valpa – Handkaes, playchess.de, 2003.

5.Nf3 e6 6.Be2 Bd5 7.0–0 Nc4 (7...a6 8.ba6 Nf6 9.Nc3+=) 8.Bd4+– Nd6 9.a4 f6 10.c4 (10.Bb2 Bb7+=) 10...Bb7 (10...Bc4 11.d3 Bd5 12.e4=) 11.Bb2 (11.a5 ba5 12.Ra5 a6+=) 11...g6 (11...a6 12.Na3+=) 12.a5+– ba5 13.Qc2 (13.c5 Nb5 14.Bb5 Bf3 15.Qf3 Rb8 16.Ra5 c6 17.Bc6 Qa5 18.Bf6 Nf6 19.Qf6 dc6 20.Qh8 Qc5 21.Qh7 Qf5+–) 13...Bg7 (13...a6 14.ba6 Bf3 15.Bf3 Ra6 16.c5+=) 14.Ra5 (14.c5 Nf7+–) 14...c6 (14...a6 15.ba6 Ra6 16.Ra6 Ba6 17.d3+–) 15.Qa4 cb5 16.cb5 Ne7 17.Ra7 Ra7 18.Qa7 0–0 (18...Bf3 19.gf3 Ndc8 20.Qb8+–) 19.Rc1+– Nd5?? (better 19...Re8+–) 20.Ba3 Qb8 (20...Nf4 21.ef4 Bf3 22.Bd6+–) 21.Qb8 Rb8 22.Bd6 Ra8 23.Na3 (23.d4 Bf8 24.Bf8 Kf8+–) 23...Bf8 (23...e5 24.d4+–) 24.Nc4 Ra2 25.e4 (25.Bf8 Kf8 26.Nd6 Ba8+–) 25...Nb4 (25...Ne7 26.Nb6 Be4 27.Nd7 Bf3 28.Bf3 Rd2 29.Nf6 Kf7 30.Ne4+–) 26.Bf8 Kf8 27.Nd6 Ba8 28.b6 Bc6 (28...f5 29.e5+–) 29.b7 Ke7 (29...Bb7 30.Nb7 Ke7+–) 30.b8Q 1–0. DEFFM – abracadabras, freechess.org, 2018.

5.Nf3 Nf6

6.Bc3 e6 7.Ba5 ba5 8.a3 c6 9.d4 Ne4 10.Bd3 (10.bc6 Bc6 11.Bd3 Rb8+=) 10...f5 (10...cb5!? 11.Bb5 Qb6+=) 11.c4 Be7? (better is 11...cb5!? 12.cb5 a6=) 12.Be4+– fe4 13.Nfd2 cb5+= 14.cb5 0–0 15.Nc3 d5 16.Qg4 Rf6 17.0–0 Rg6 18.Qe2 Bd6 19.f4 Rc8 20.Rac1 Ba3+= 21.Rc2 Bb4 22.Ndb1 Rh6 23.Rfc1 Qh4 24.h3 Rg6 25.Nd5?? Rc2–+ 26.Rc2 ed5 27.Rc7 Qh3 28.Rb7 Rg3?? 29.Qa2 Qh5 30.Rd7?? Re3–+ 31.Rd5 Re1 32.Kf2 Qh4 33.g3 Qh2# 0–1. olawoj – artur58, kurnik, 2012.

6.c4 g6 7.d4 Bg7 8.Nbd2 d5 9.c5 bc5 10.dc5 0–0 11.c6 Bc8 12.Qa4 Nc4 13.Nc4 dc4 14.Bc4 Bf5 15.Nd4 Be4 16.f3 e5 17.Ne2 Bf5 18.Be5 Qe7 19.Bd4 Nh5 20.Bg7 Ng7 21.Qb3 Rae8 22.e4 Be6 23.0–0 Qc5 24.Kh1 Bc4 25.Qc3 Qb5 26.Nd4 Qa6 27.Rfc1 Be6 28.a4 Rb8 29.Nb5 Rb5 30.ab5 Qb5 31.Ra7 Qb6 32.Rb7 Qf2 33.Rc7 Nh5 34.Qc2 Qh4 35.Rb7 Ng3 36.Kg1 Nh5 37.g3 Qg5 38.c7 Ng3 39.hg3 Qg3 40.Qg2 Qd6 41.Rb8 Qd4 42.Kh1 Qe3 43.Rf8 Kf8 0–1. karoo54 (1625) – ibri67 (1635), kurnik, 2012.

6.Be2 d6 7.d3 Qd7 8.a4 0–0–0 9.c4 e5 10.Nc3 Be7 11.Nd5 Nd5 12.cd5 Bd5 13.e4 Bb3 14.Qd2 Rhg8 15.Bc3 d5 16.Ba5 ba5 17.Qa5 Kb8 18.Ne5 Qe6 19.Nc6 Kc8 20.h3 de4 21.Bg4 f5 22.Nd8 Rd8 23.Bd1 ed3 24.Kd2 Bg5 25.Kc3 Qc4 26.Kb2 Bf6 27.Ka3 Ba1 28.Qa6 Kb8 29.Bf3 Rd5 30.Bd5 Qd5 31.Ra1 d2 32.Rg1 d1Q 33.Rd1 Bd1 34.f3 Qb3 0–1. eliton – stan69, kurnik, 2012.

6.Be2 e6 7.0–0 d5 8.d3 Bd6 9.Nbd2 0–0 10.c4 dc4 11.Nc4 (11.dc4 a6=) 11...Nc4 12.dc4 Ne4 13.Qd4 Nc5?? (better is 13...f6=) 14.Qg7 1–0. erisonpassos – qani, kurnik, 2011.

6.Be2 e6 7.0–0 Be7 8.d3 0–0 9.Qd2 Bd6 10.Bc3 c6 11.a4 c5 12.Ba5 ba5= 13.Na3 e5 14.Nc4+/– e4?? 15.Nd6+– ef3 16.Nb7 Qc7 17.Bf3 Ne8 18.Na5 Rc8 19.c4 g5 20.Nb3 h6 21.Rfb1 f5 22.Bd5 Kh7 23.d4 Nf6 24.dc5 Nd5 25.cd5 d6 26.c6 (26...Kg8 27.Nd4+–) 1–0. Zoltan – Sanji, mySchach.de, 2003.

6.Be2 e6 7.0–0 Bf3 8.Bf3 Rb8 9.d4 (9.e4 c6+/–) 9...Nc4 10.Bc3 Bd6 (10...c6 11.bc6 d5 12.Nd2+=) 11.e4 (11.Qd3 Na3+/–) 11...Be7 (11...Ne4 12.Be4 Qh4 13.Re1 Qh2 14.Kf1 Qh1 15.Ke2 Qh5 16.Bf3 Qb5 17.a4+/–) 12.e5 Nd5 13.Qd3 Nc3 14.Qc4 Nb1 15.Rab1 0–0 16.a4 Bg5 (16...Rc8 17.Qd3+=) 17.d5+/– Bd2 (better is 17...Rc8!?+/–) 18.Rbd1+– Ba5 (18...ed5 19.Qd5 Bb4 20.Qd7+–) 19.de6 fe6 20.Bc6! Qg5 (20...dc6 21.Qe6 Double attack (21.Rd8 Pinning; 21.Rd8 Deflection; 21.Qe6 Decoy)) 21.Bd7 Qe5 22.Qe6 Qe6 23.Be6 Kh8 24.Rd7 Rbc8 25.g3 Bb4 26.Kg2 Bd6 27.c4 Rce8 28.Bg4 Re4+/– 29.Bf3 Rc4 30.Re1 Ra4= 31.Re2 Ra3 32.Bd5 Rd3 33.Bc6= h6 34.h4 Rd4 0–1. emeryt85 – 0rackle, kurnik, 2011.

4.b5 Nb4

5.a3 Nc2? 6.Qc2+– c5 (6...c6 7.bc6 Bc6 8.Nf3+–) 7.Qd1 (7.Nf3 Bf3 8.gf3 d5+–) 7...Nf6 8.Nf3 Be4 (8...e6 9.Be2+–) 9.d3 (9.Nc3 Bf3 10.Qf3 d5+–) 9...Bd5 (9...Bb7 10.Be2+–) 10.e4 (10.Be2 e6+–) 10...Be6 (10...Bb7 11.e5 Nd5 12.d4+–) 11.Be2 d5 12.Nbd2 (12.e5 Nd7 13.Ng5 a6+–) 12...d4 13.0–0 (better 13.Ne5+–) 13...Nh5? (13...a6 14.ba6 Ra6 15.Rb1+–) 14.Ng5 (14.Nd4 cd4 15.Bh5 g6+–) 14...g6 (14...Nf4 15.Ne6 fe6 16.Nc4+–) 15.Ne6 fe6 16.Bh5 gh5 17.Qh5 Kd7 18.Nc4 h6 (18...Bg7 19.a4+–) 19.f4 (better 19.Ne5 Kc8 20.Nf7+–) 19...Bg7 20.f5 (20.Qg6 Qg8+–) 20...ef5 (20...Qg8 21.a4 ef5 22.Rf5+–) 21.Qf5 (21.Qg6!? Bf6 22.e5 Rf8 23.Qf5 Kc7 24.ef6 ef6+–) 21...Kc7 22.Qe6 (better 22.Qg6!? Bf6+–) 22...Qd7 23.Qf7 Rhg8 24.Qf4 (better 24.Qg6 Bf6 25.Qh6 Qb5 26.Qf4 Kd7 27.Qf5 Kc7+–) 24...e5 (24...Kb7 25.Qg3 Qb5 26.Rf7+–) 25.Ne5 Be5 26.Qe5 Qd6 (26...Kb7+–) 27.Rf7 Kd8 28.Qd6 Kc8 (28...Ke8 29.Qd7) 29.Qc7 1–0. GuestVZQN – GuestNQTT, freechess.org, 2017.

5.a3 Nd5

6.c4 Ndf6

7.Nf3 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 e6 11.Be2 Nh6 (11...Bd6 12.0–0=) 12.0–0 (12.h3 Nf5=) 12...Nf5 (better 12...Bd6=) 13.e4 (better 13.d3+=) 13...Nd6?? (better 13...Ne4 14.Nc3 Bd6–/+) 14.d3?? (better 14.e5+–) 14...Nc8 (14...Nh5 15.g3 Rg8+–) 15.Ne5 (15.Nbd2 Ne7+–) 15...d6 (15...Ne7!?+=) 16.Nc6+– Bc6 17.bc6 Ne7 18.Qa4 d5? (better 18...Ng6+–) 19.cd5+– ed5 (19...Ng6 20.de6 fe6+–) 20.ed5 (20.e5 Nfg8+–) 20...Nfd5? (better 20...Ned5 21.Bf3 Be7+–) 21.Bf3 (better 21.Bg4 f5 22.Bh5 Ng6 23.Re1 Be7 24.Bg7+–) 21...Qd6 (21...h5 22.Nc3 Nc3 23.Bc3+–) 22.Nc3 Qc6 (22...Nc3 23.Bc3 h5 24.Qa8 Qd8+–) 23.Qc6 (better 23.Qa2!? Qe6 24.Nd5 Kd8+–) 23...Nc6 24.Re1 (better 24.Nd5!? Kd8+–) 24...Nde7 25.Bc6 (25.Bc6 Kd8 26.Bf3+–) 1–0. sharpyn – navi77, PlayOK, 2018.

7.Nf3 a6 8.a4 ab5 9.ab5 e6 10.Be2 Bc5 11.Nc3 c6 (11...Ra1 12.Qa1 Nh6 13.d4+=) 12.0–0 Nh6 13.h3 (13.Ra8 Ba8 14.bc6 Bc6+–) 13...0–0 14.d4 Bb4 15.Qc2 c5 (15...Qe7 16.bc6 Bc6 17.Ne5+=) 16.Ra8 Ba8 17.dc5 bc5 18.Na2 Qa5? (better 18...Ba5!?+–) 19.Nb4+– Qb4 (19...cb4 20.Bf6 gf6 21.Qb2+–) 20.Bc3 Qa3?? (20...Be4 21.Bb4 Bc2 22.Bc5 Ra8+–) 21.Ra1 (21.Ra1 Qa1 22.Ba1+–) 1–0. GuestQWHV – GuestHJDN, freechess.org, 2017.

7.Nf3 Ne4 8.d3 Nc5 (8...Nd6 9.d4 (9.Nc3 a6 10.Be2 ab5 11.Nb5+= 0.41; 9.Be2+= a6 10.Nc3 ab5 11.Nb5+= 0.34) 9...a6 10.ba6 Ba6 11.Nbd2+= 0.50; 8...Nef6 9.Nc3 (9.Be2 a6 10.0–0 e6 11.Nc3+= 0.56; 9.e4 a6 10.Be2 ab5 11.e5= 0.16) 9...a6 10.Be2 ab5 11.cb5+= 0.59) 9.Nc3 (9.d4 Ne4 10.Bd3 a6 11.0–0+= 0.59; 9.Be2 a6 10.0–0 ab5 11.cb5+= 0.47; 9.Nbd2 a6 10.d4 Ne4 11.Ne4+= 0.56) 9...Nf6 (9...a6 10.d4 Ne4 11.Ne4+= 0.56) 10.d4 Ne6 (10...Nce4 11.Ne4 Be4 12.Bd3=) 11.c5 (better is 11.Bd3+/–) 11...bc5? (better is 11...Bf3 12.gf3 c6 (12...bc5? 13.d5+–) 13.cb6 ab6 14.bc6 dc6+=) 12.d5+– Ng5 (12...Nd5 13.Nd5 Rb8+–) 13.Ng5 h6 14.Nge4 Ne4 15.Ne4 e6 16.Bc4 ed5 17.Bd5 Bd5 18.Qd5 Rb8 19.Rd1 Rb5 20.Bf6 Be7 21.Bg7 Rg8 22.Nf6! Bf6 23.Bf6 Qc8 24.Qe4 Kf8 25.Qe7# 1–0. pereira – tgury, internet, 2009.

7.Nf3 e6 8.Be2 a6 9.0–0+=.

7.Nf3 e6 8.Be2 Bc5 9.d4 Bd6 (9...Be7 10.0–0+=) 10.Nbd2 h6 (10...Nh6 11.Qc2+=) 11.Qc2 (11.0–0 Qe7+–) 11...c6 (11...a6 12.c5 Be7 13.c6+–) 12.e4 Bc7 13.bc6 (13.e5 Nh5+–) 13...Bc6 (13...dc6 14.e5 Nd7 15.Rd1+–) 14.d5 ed5 (14...Bb7 15.d6! Bb8 16.0–0+–) 15.cd5+– Bb7 16.0–0 (better 16.d6 Bd6 17.e5+–) 16...Ng4? (better 16...Bf4+–) 17.Bg7+– Rh7 (17...Rc8 18.d6 Bb8 19.Qd3+–) 18.Bb2 Rc8 19.Qd3 h5 20.d6 Bb8 21.h3 N4h6 22.e5 Rg7 23.e6! f6 (23...de6 24.Qb5 Double attack (24.Bg7 Discovered attack); 23...fe6 24.Bg7 Discovered attack) 24.e7 Ne7 (24...Re7 25.de7 Qe7 26.Rac1+–) 25.Bf6 (25.Bf6 Bd6 26.Bg7+–) 1–0. pierre (2005) – millerm4, internet, 2015.

7.Nf3 e6 8.Be2 Bd6 9.Nc3=.

7.Nf3 e6 8.Be2 g6 9.0–0 Bg7 (9...a6 10.ba6 Ra6 11.Nc3+=) 10.d4 d6 (10...a6 11.ba6 Ba6 12.Nbd2+/–) 11.Nbd2 Ne7 12.Ng5 (12.Qc2 a6+=) 12...0–0 13.Bf3 Rb8 (13...c6 14.Rb1+=) 14.Bb7+/– Rb7 15.Qf3 (15.e4 c6+=) 15...Rb8 (15...d5 16.e4+=) 16.a4 (16.d5 e5+/–) 16...Nf5 (16...d5 17.cd5 ed5 18.Rac1+=) 17.Nde4 (17.Rfd1 d5+/–) 17...Nh4 (17...a5 18.Rac1+=) 18.Qh3 (18.Qf4 Ne4 19.Ne4 Nf5+/–) 18...h6 (18...Ne4 19.Ne4 Rc8 20.Rfb1+/–) 19.Qh4 (better is 19.Ne6 fe6 20.Qh4+/–) 19...Nh7?? (better is 19...Ne4 20.Qe4 Qg5+/–) 20.Nf3+– f6 (20...Qh4 21.Nh4 Nf6 22.Nf6 Bf6 23.Nf3+–) 21.a5 (21.Qg3 f5 22.Ned2 g5+–) 21...ba5 (21...f5 22.Qd8 Rfd8 23.Nc3+–) 22.Ra5 Ra8 23.Ba3 f5 24.Qd8 Rfd8 25.Ned2 Nf6 26.c5 d5 27.c6 Bf8 28.Bf8 Kf8 29.Rfa1 Ne8 30.Ra7 Rac8 31.Ne5 Ke7 32.Ng6 Kf6 33.Ne5 Kg5 34.Nf7 Kf6 35.Nd8 Rd8 36.Ra8 Ra8 37.Ra8 Ng7 38.Rc8 Ke7 39.Rc7 Kd6 40.Rg7 (40...e5 41.c7 ed4 42.c8Q f4 43.ef4 d3 44.Qc6#; 40.Rd7#) 1–0. Pruvost,Alain – Denaes,Marie Therese, 7e open Herlies, 2002.

7.h3 d5 8.Nf3 dc4 9.Bc4 e6 10.0–0 Ne4 11.Qb3 Bc5?? (better is 11...Nc5 12.Qc2 Bf3 13.gf3 a6=) 12.Bg7 +–.

4.b5 Nb8

5.a4 d6 6.c4 Nd7 7.Nf3 e6 8.Bd3 Ngf6 9.Nc3 g6 10.Ne4 Bg7 11.Nf6 Bf6 12.Bf6 Qf6 13.0–0 0–0 14.Nd4 Nc5 15.Bc2 e5 16.Ne2 Qg5 17.Ng3 h5 (17...e4 18.a5 ba5 19.Ra5=) 18.f3 (18.d4 h4 19.f4 ef4 20.ef4 Qf6+=) 18...h4 19.Ne4 Be4 20.fe4 Kg7 21.h3 (21.Qf3 Nb7+=) 21...Nd7 22.Qf3 Nf6 23.Rf2 Nh5 24.Raf1 (24.a5 Rac8+–) 24...Qg3 25.d3 (25.Qe2!?+=) 25...Qf3= 26.Rf3 Ng3 27.R1f2 f6 28.d4 g5 29.de5 fe5 30.Rf8 Rf8 31.Rf8 Kf8 32.Kf2 Kg7 33.Kf3 Kg6 34.Kg4 0–1. b4_Bb2 (1700) – hansi44 (1685), lichess.org, 2019.

5.Nf3 c6 6.a4 a6 7.c4 ab5 8.cb5 cb5 9.ab5 Ra1 10.Ba1 Nf6 11.Be2 e6 12.0–0 d5 13.h3 (13.Be5 Nbd7+=) 13...Nbd7= 14.Ne5 Bd6 15.Nc6 (15.Nd7 Qd7 16.Bf6 gf6=) 15...Qc7 16.Qc2 Nc5 (16...0–0 17.Rc1 Kh8 18.d4=) 17.Bf6+= gf6 18.d4 Bc6 (18...Ne4 19.Nc3 Nc3 20.Qc3+=) 19.dc5+– Bh2 (19...Bb7 20.c6+–) 20.Kh1 Bb7 21.c6 Bc8 (21...Bd6 22.e4 de4 23.Nc3+–) 22.Nd2 (22.g3!? Bg3 23.fg3 Qg3 24.Rf3+–) 22...Bd6+– 23.Nf3 e5 24.Ra1 0–0 25.Nh4 (25.Qa2 Be6+–) 25...e4+= 26.Bg4 (26.Qd2 f5+=) 26...Bg4 (better 26...Qe7!? 27.Qb2 f5 28.Nf5 Bf5 29.Bf5 Be5=) 27.hg4+– Kg7? (better 27...Qe7 28.Rd1 Qe5+–) 28.Nf5 Kg6 29.Qd1 (29.Rd1 Bc5 30.Rd5 Re8+–) 29...Bc5? (better 29...Be5 30.Ra2 Rd8+–) 30.Qd5 Re8 31.Ng3 Be3 (31...Qe5 32.Qe5 fe5 (32...Re5?? 33.c7 Re8 34.Rd1+–) 33.Ne4 Bb4+–) 32.Qf5 (32.fe3?! Qg3 33.Qd7 Qe5+–) 32...Kg7 33.Nh5 (33.Nh5 Kf8 34.Nf6 Bf2 35.Ne8+–; 33.fe3?! Qg3 34.g5 Qe3 35.gf6 Kh8+–) 1–0. Abdullaevich (1765) – Abzorber (1840), lichess.org, 2020.

5.Nf3 d6 6.a4 Nd7 7.g3 e5 8.Bg2 Ngf6 9.Nc3 Be7 10.a5 0–0 (10...ba5 11.Ra5 a6 12.Qa1 ab5 13.Ra8 Ba8 14.Nb5=+) 11.a6+– Bf3 (11...Bc8 12.0–0 d5 13.d4+–) 12.Qf3 Rb8 13.d4 ed4 14.ed4 d5 (14...Re8+–) 15.0–0 Rc8 (15...Bd6 16.Nd5 Nd5 17.Qd5+–) 16.Nd5 c5 (16...Nd5 17.Qd5 Bd6+–) 17.bc6! Rc6 (17...Nd5 18.Qd5 Nf6+–) 18.Ne7 (18.Ne7 Qe7 19.Qc6+–) 1–0. Dalia – Magadan, internet, 2019.

5.Nf3 a6

6.a4 Nf6 7.Be2=.

6.c4 ab5 7.cb5 c6 8.a4 cb5 9.ab5 Ra1 10.Ba1 Nf6 11.Be2 g6 12.0–0 Bg7 13.Nc3 0–0 14.d3 d6 15.Nd4 Qd7 16.Nb3 Nd5 17.Nd5 Bd5 18.Bg7 Kg7 19.Qa1 Kg8 20.Nd4 e5 21.Nc2 Qb5 22.e4 Be6 23.Na3 Qb3 24.Rb1 Qa4 25.Rb6? d5?? 26.ed5= Bd5 27.f3?? Nc6 28.Rb5 Be6 29.Bd1?? Qa8?? 30.Rb6?? Nd4 31.Qb2 Qa5 32.Kf2 Ra8 33.Rb8 Kg7 34.Ra8+= Qa8 35.g4 Bd5 36.Nc4 Bf3?? 37.Bf3?? Qf3–+ 38.Ke1 Qd3 39.Ne5 Qe3 40.Kd1 Qe5 41.h3 Qd5 42.Qc3 f6 43.h4 Ne6 44.Qd2 Qd2 45.Kd2 h6 46.Ke3 Nc5 47.Kd4 Nb3 48.Kc3 Nc5 49.Kd4 Ne6 50.Ke4?? Kf7 51.Kf3 Ng7 52.Kf4 h5 53.g5 fg5 54.Kg5 Ne6 55.Kh6 Kf6 56.Kh7 Kf5 57.Kh6 Nf4 58.Kg7 Ng2 59.Kh6 Nh4 60.Kg7 Nf3 61.Kh6 h4 62.Kg7–+ h3 63.Kf7 h2 64.Ke7 h1Q 65.Kd6 g5 66.Kd5 g4 67.Kd6 g3 68.Kd5 g2 69.Kd6 g1Q 70.Kd5 Ne5 71.Kd6 Qd1 72.Kc5 Qhd5 73.Kb4 Qc4 74.Ka3 Qdc1# (74...Qdb3#) 0–1. cogit – nalim11, kurnik, 2012.

6.a4 ab5 7.ab5 Ra1

8.Ba1 c6 9.c4 cb5 10.cb5 e6 11.Be2 Bc5?? (better is 11...Nf6+=) 12.Bg7+– Bf3 13.Bf3 Qg5 14.Bh8 Nf6 15.Bf6 Qf6 16.Nc3 d5 17.0–0 Nd7 18.d4 Bd6 19.Qa4 Qh6 20.g3 f5 21.Nd5! ed5 22.Qa8 Ke7 23.Qd5 Qg6 24.Rc1 f4 25.Bg2 fe3 26.fe3 Qd3 27.Qg5 Nf6 28.Rf1 Qg6 29.Qg6 hg6 30.e4 Ng4 31.e5 Bb4 32.Rd1 Ne3 33.Rd3 Nf5 34.Bc6 Ke6 35.Kg2 Ne7 36.Kf3 Nf5 37.Ke4 White intends d5 37...Ke7 38.g4 Nh4 39.d5 Bc5 40.d6 Bd6 41.ed6 Kd8 42.Ke5 g5 43.Ra3 Ng6 44.Kf6 Ne7 45.Ra8 Nc8 46.d7 Kc7 47.dc8Q Kd6 48.Qe6 Kc7 49.Ra7 Kb8 50.Rb7 Ka8 51.Qc8# (51.Qe8#) 1–0. orangutandu – puszor, kurnik, 2012.

8.Ba1 c6 9.c4 d5 10.Ne5 dc4? (better is 10...e6=) 11.Qf3+– (11.Nc4?! Nd7=) 11...Qc7?? (better is 11...Nf6 12.Bc4 e6 13.bc6 Ba6+–) 12.Qf7 Kd8 13.Qf8# 1–0. aleksandras19 – karlos42, kurnik, 2012.

8.Ba1 d6 9.c4 e5 10.Be2 Nf6 11.0–0 Be7 12.d4 e4 13.Nfd2 d5 14.Nc3 0–0 (14...dc4 15.Bc4 Bd6 16.Qc2+=) 15.Qb3 (15.cd5 Bd5 16.Qc2 c6+/–) 15...c6 (15...dc4 16.Qc2+=) 16.bc6+/– Bc6 (16...Nc6 17.c5!+/–) 17.Rb1 Nbd7? (better is 17...dc4!? 18.Qb6 Qd6+/–) 18.cd5+– (18.Nd5?! Bd5 19.cd5 Bd6+/–) 18...Bb7 19.Nde4 Ne4 20.Ne4 Nf6 21.Nf6 Bf6 22.e4 Re8 23.f3 Bg5?! 24.Qb6 Bc8 25.Qd8 Rd8 26.Kf2 Bd7 27.Rb7 g6 28.g3 Bd2 29.f4 f5 30.e5 h5 31.Bb2 Ba4 32.d6 Kf8 33.e6 Ke8 34.d7 Ke7 35.d5 g5 36.Ba3 Kf6 37.e7 Rd7 38.Rd7 (38.Rd7 Bd7 39.Bh5 gf4 40.Bd6+–; 38.e8Q Be1 39.Ke1 Rb7 40.Qh8 Rg7 41.Qh6 Rg6 42.Qf8#) 1–0. carocan (1655) – marian8806, kurnik, 2011.

8.Ba1 d6 9.Be2 e6 10.0–0 Nd7 11.c4 Qe7 12.d4 g6 (12...Ngf6 13.Nbd2+=) 13.d5 (13.Nbd2 Ngf6+/–) 13...Ngf6+= 14.de6 (14.Qa4 ed5 15.Qa7 Nc5+=) 14...fe6= 15.Nbd2 Bg7 16.h3 0–0 17.Nd4 (17.Qc2 e5=) 17...Nc5 18.Qc2 Nfd7 (18...Nfe4 19.Bb2+=) 19.Nc6 (19.Bf3 Bf3 20.N2f3 e5=) 19...Qg5 (19...Bc6 20.Bg7 Kg7 21.bc6+=) 20.f4 (20.Bg7 Kg7 21.Bf3 Qf6=) 20...Qh4 21.Nf3 Qg3 22.Bg7 Kg7 23.Qc3 Kf7?? 24.Ng5+/– Ke8 25.Ne6?? Ne6–+ 26.Bf3 Ndc5 27.Ra1 Kd7 28.Rd1 g5 29.fg5 Rf3 30.Ne5 Ke7 31.Nf3–/+ Bf3 32.Rd2?? Ne4 (32...Ne4 33.Qf6 Nf6 34.gf6 Kf7–+) 0–1. emeryt85 – pornpimon191, kurnik, 2011.

8.Ba1 e6 9.Be2+=.

5.Nf3 e6

6.c4 Nf6 7.Be2=.

6.Be2 h5 7.c4 Nf6 8.Nc3 c6 (8...a6 9.0–0+=) 9.a4 (9.0–0 a6+=) 9...cb5 10.ab5 a6 (10...a5 11.ba6 Ra6 12.Ra6 Na6 13.0–0+–) 11.0–0 ab5 (11...Be7 12.d3+–) 12.Ra8 Ba8 13.Nb5 Bc6 14.Qa4 Bc5 (14...Be7 15.Bd4+–) 15.Ra1 (15.Bf6 gf6 16.d4 Be7+–) 15...0–0 16.Qc2 (16.Be5 d5+–) 16...Be4 (16...d5 17.Ng5 Nbd7 18.cd5 Bd5 19.Bh5+–) 17.d3 Bg6 (17...Bc6 18.Nfd4+–) 18.Ne5 Bh7 19.Ra8 Qc7?? (better 19...Qc8+–) 20.Nc7 1–0. Janek – Cururo, internet free game, 2017.

5.Nf3 Nf6

6.Be2 g6 7.0–0 Bg7 8.d4 0–0 9.Nbd2 c6 10.c4 cb5 11.cb5 d6 12.Qb3 Nbd7 13.Rfc1 e5 14.h3 ed4 15.Nd4 Nc5 16.Qc2 Nd5 17.N2b3 Qg5 18.Nc5?? (18.Nf3 Qe7 19.Bg7 Kg7+=) 18...dc5 (better is 18...Ne3 19.Bf3 Nc2 20.Rc2 bc5 21.Bb7 Rab8–+) 19.Nf3+= Qe7 20.Bg7 Kg7 21.Qb2 f6 22.Rd1 Nb4 23.Bc4 Bf3 24.gf3 Rad8? (better is 24...Qe5!? 25.Qe5 fe5+/–) 25.a3+– Rd1 26.Rd1 Qd7?? (26...a5 27.ab4 cb4+–) 27.Rd7 (27.Rd7 Kh8 28.Qd2 Na6 29.Qd6 Rf7 30.Rf7 h6 31.Qd8#) 1–0. mihai740609 – dumnica, kurnik, 2012.

3.e3 d5

4.a4 c5 5.bc5 bc5 6.c4 Nc6 7.Nc3 (7.cd5!? Qd5 8.Nc3+=) 7...d4=+ 8.ed4 cd4 9.Nd5 e5 10.Nf3 (better 10.f4=+) 10...Nb4 (better 10...Nf6–/+) 11.Nb4 Bb4 12.a5 (better 12.Ne5!? Nf6 13.Nd3+=) 12...Qd6=+ 13.Ne5? (better 13.a6 Bf3 14.Qf3=+) 13...Qe5–+ 14.Be2 Bg2 15.Rg1? (15.Qa4 Kd8 16.Qb4 Bh1 17.Qf8 Kd7 18.Qf7 Kc6–+) 15...Qh2 (better 15...Bc6 16.Rg4 Bc5–+) 16.Qa4 Kd8 17.Rg2 Qh1?? (better 17...Qg2 18.Qb4 Nf6–+) 18.Bf1= Bc5 19.Qc6 (worse 19.Rg7 Qe4 20.Kd1 Rb8–/+) 19...Rc8 20.Qd5 Attacking the isolated pawn on d4 20...Ke8 21.Bd4 Bd4 (better 21...Ne7!? 22.Qe4 Bd4 23.Qd4 Rc6+=) 22.Qd4+– Nf6 23.Rg3 1–0. b4_Bb2 (1780) – nietzscheshorse (1695), lichess.org, 2020.

4.b5 a6 5.a4 c6 6.Nf3 (6.Nc3 Nf6+=) 6...c5 (6...ab5!? 7.ab5 Ra1 8.Ba1 c5=) 7.c4 ab5 (better 7...e6+–) 8.ab5 (better 8.cd5 ba4 9.Bb5 Nd7 10.Ne5+–) 8...Ra1= 9.Ba1 e6 10.Be2 (10.cd5 ed5 11.Be5 Nd7=) 10...Nd7 11.cd5 Bd5 (11...ed5 12.Nc3=) 12.Nc3 Bb7 13.0–0 Ngf6 14.Bc4 (14.Bb2 Bd6=) 14...Bd6 (14...Qc7 15.Bb2=+) 15.Nh4 (15.d4 cd4 16.Qd4 Qb8=) 15...0–0 (15...g5 16.Nf3 g4 17.Nh4=+) 16.f4=+ Ne4 (16...Qc7 17.Qc2=) 17.Ne4= Be4 18.Nf3 Bf3 (better 18...h6!?=) 19.Qf3+– (19.gf3?! e5 20.fe5 Be5=) 19...Qc7 20.Bc3 e5 (20...Nf6 21.g3+–) 21.Qg3+– Nf6?? (better 21...Kh8+–) 22.fe5 Ne4 (22...Ne8 23.ed6 Qd6 24.Rf4+–) 23.Rf7 Rf7 (23...Qf7 24.Bf7 Rf7+–) 24.ed6 Ng3 (24...Kf8 25.dc7 Rf1 26.Bf1 Ng3 27.c8Q Ke7 28.hg3 h6 29.Qc7 Ke8 30.Bd3 g5 31.Bg6 Kf8 32.Qf7) 25.dc7 Ne2 26.Kh1 Nc3 (26...h5 27.c8Q Kh7 28.Bf7 Nd4 29.ed4 h4 30.Qf5 g6 31.Qg6 Kh8 32.dc5) 27.c8Q 1–0. GuestCSGX – toniovan, freechess.org, 2019.

4.b5 Nd7 5.d4 Ngf6 6.Nf3 g6 (6...a6 7.a4=) 7.c4+= dc4 8.Bc4 Bg7 (8...a6 9.0–0+=) 9.0–0 e6 (9...0–0 10.Qe2+=) 10.Nbd2 Ng4 (10...a6 11.a4+=) 11.h3 (11.Qc2 a6+–) 11...h5 (11...Ngf6 12.Qc2+=) 12.a4 (12.Qc2 Ngf6+–) 12...Rc8 (12...Ngf6 13.Qc2+–) 13.Qb3 (13.Bd3 Ngf6+–) 13...Qe7 (13...Ngf6!?+–) 14.Ba3 Qf6 15.e4 (15.hg4 hg4 16.Be6 gf3 (16...fe6?! 17.Ne1–/+) 17.Bd7 Kd7–+) 15...Qd8? (15...Nh6 16.e5 Qd8 17.Be6+–) 16.e5 (better 16.Be6 Qf6 17.Bd7 (17.hg4?! Qe6 18.Qe6 fe6+–) 17...Kd7 18.hg4 hg4 19.Ne5 Ke8 20.Bb2+–) 16...c6?? (better 16...Nf8+–) 17.Be6 (worse 17.hg4 c5 18.g5 h4+–) 17...Qe7 1–0. GuestLMGT – GuestVDBZ, freechess.org, 2018.

4.b5 Nd7 5.Nf3 Ngf6 6.c4 c6 7.a4 e6 8.Nc3 h6 9.bc6 Bc6 10.cd5 Nd5 11.Bc4 Nc3 12.Bc3 Nf6 (12...Bd6!?=) 13.Ne5+= Bd7 14.Nd7 Nd7 15.Qf3 Rc8 16.Bb5 Rc7 (16...Rh7 17.a5+–) 17.0–0 Rc3?? (better 17...Qc8+–) 18.dc3+– Be7 (18...a6 19.Bd7 Qd7 20.Qa8 Qd8 21.Qa6 Bd6+–) 19.Rfd1 a6 (19...Kf8 20.Rd7 Qb8 21.Qc6+–) 20.Rd7 ab5 21.Rd8 Bd8 22.Qc6 Ke7 23.ab5 f5 24.Ra7 Kf6 25.Qd7 Rf8 (25...Rg8 26.Qf7 Ke5 27.f4 Ke4 28.Qd7 Bf6 29.Kf2 Ra8 30.Ke2 Rd8 31.Qe6 Be5 32.Qe5) 26.Qg7 1–0. DEFFM – GuestNNYP, freechess.org, 2018.

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

4.c4 dc4 5.Bc4 Nf6 6.Nf3 h6 7.0–0 e6 8.a3 Bd6 9.Nc3 0–0 10.Rb1 c5 (10...Nbd7 11.d4=) 11.bc5 Bc5 12.d4 Bd6 13.Nb5 Bc7 (13...Be7 14.Bd3=) 14.Nc7 Qc7 15.Rc1 Qd6 16.Be2 Rd8 17.Rc3 (17.Ne5 Nc6+=) 17...Ne4 18.Rc4 Ba6 (18...Bd5 19.Rc1=) 19.Rc2+= Be2 20.Qe2 Nd7 21.Rfc1 Ndf6 (21...a6 22.Rc6 Qd5 23.Rc7+=) 22.Rc6 (22.Ne5 Nd7+–) 22...Qd5+= 23.Rc7 (23.Ne5 Nd7 24.Nd7 Rd7+=) 23...Ng4= 24.h3 Ngf2 25.Ne5 Nh3? (better 25...Qb3+–) 26.gh3+– Ng5? (26...Rf8+–) 27.h4 Nh7 (27...Ne4 28.Nf7 Rf8+–) 28.Rf7 Rf8 29.Rg7! Kg7 30.Qg4 Kh8 (30...Ng5 31.hg5 Qb7+–) 31.Ng6 Kg8 32.Ne7 (32.Ne7 Kh8 33.e4+– (33.Nd5?! Rg8 34.Qg2 ed5+=); 32.Nf4 Kh8 33.Rc7+– (33.Nd5?! Rg8 34.Qg2 ed5+=)) 1–0. aravind555 (1775) – Khaya_Mamba (1735), lichess.org, 2020.

4.d4 e6 5.a3 Bd6 (5...a5 6.ba5 Ra5 7.Nf3+=) 6.Nf3 Nd7 (6...Nf6 7.Bd3=) 7.c4 c6 8.Nc3 Ngf6 9.Be2 dc4 10.Bc4 (10.e4 Be7 11.Bc4=) 10...Nd5 (10...a5 11.0–0=) 11.0–0 (11.e4 b5 12.Bb3 N5b6+=) 11...0–0 (11...a5 12.ba5 Ra5 13.e4+=) 12.Re1 (12.e4 Nc7+/–) 12...Qc7 (12...a5 13.Ne4 Be7 14.b5=) 13.Nd5 (13.e4 Nc3 14.Bc3 h6+/–) 13...cd5 (13...ed5 14.Bd3=) 14.Bd3 Nf6 15.b5 (15.Rc1 Qe7+=) 15...Rac8 (15...Ne4=) 16.a4 (16.Rc1 Qb8+=) 16...Ng4 (16...Ne4!?+=) 17.h3= Nh2?? (better is 17...Nf6=) 18.Ne5 (better is 18.Nd2 Rfe8 19.Qe2+–) 18...Be5?? (18...g5+–) 19.de5 f6 20.Kh2 fe5 21.Kg1 e4 22.Bb1 Qf7 23.Rf1 Qg6 24.Qd4 Rf5 25.Ba3 Rh5? 26.Kh2 Rc4 27.Qd1 Rg5 28.Rg1 Qf6 29.Ba2 Rc7 30.Rc1 Rc1 31.Qc1 Qf2 32.Bb3 h6 33.Qc3 Rg3 34.Bd6?? Re3+= 35.Qc2 Re2?? 36.Qc7+– Qf7 37.Qb8 Kh7 38.Qa7 d4? 39.Qb6 d3 40.Bc4 Bd5 41.Qd4 Qg6?? 42.Bb4 e3 43.Bd3 Rg2 44.Rg2 (44.Rg2 Bg2 45.Bc3 Be4 46.Be4 e5 47.Qe5 Kg8 48.Bg6 e2 49.Qg7) 1–0. Figiel,Rafal – Lipko,K, casual, 2001.

4.Nf3 a6 5.a4 e6 6.c4 Nf6 7.Bc3 (7.cd5 ed5 8.Qb3 Be7=) 7...Ne4 (7...Be7 8.cd5 ed5 9.Be2=+) 8.b5 Nc3 (8...c6 9.cd5 Qd5 10.Qc2=) 9.Nc3= Bb4 (9...dc4 10.Bc4 ab5 11.ab5=) 10.Qb3 (10.cd5 Bc3 11.dc3 Qd5 12.Qd5 Bd5=+) 10...Bc3 11.Qc3 Qf6 (11...0–0 12.a5 dc4 13.ab6 cb6 14.Bc4=) 12.d4+= ab5 (12...dc4 13.Bc4 Bf3 14.gf3+=) 13.cb5+– c5 (13...Qd8 14.a5 Ra5 15.Ra5 ba5 16.Qa5+–) 14.bc6 Bc6 (14...Bc6 15.Ne5 Decoy; 14...Nc6 15.Bb5 Pinning (15.Bb5 Decoy)) 15.Ne5+– Bd7 (15...Ra4?? 16.Ra4 Ba4 17.Qc8 Qd8 18.Qd8 Kd8 19.Nf7 Ke7 20.Nh8+–) 16.a5 (16.Qc7 0–0 17.Nd7 Qe7 18.Nf6 Qf6+–) 16...ba5 (16...Ra5 17.Ra5 ba5 18.Qc7+–) 17.Qc7 Qd8 (17...0–0 18.Nd7 Nd7 19.Qd7+–) 18.Qd8 Kd8 19.Nf7 Ke7 20.Nh8 Kf8? (20...Nc6+–) 21.Rc1 a4 (21...Nc6 22.Bb5 Ne5 23.de5 Bb5 24.Rc7+–) 22.Kd2 a3 (22...g5 23.h4 g4 24.Be2+–) 23.Bd3 Kg8 (23...g5 24.h4 g4 25.Bh7+–) 24.Rc3 Kh8 (24...a2 25.Ra1 Nc6 26.Bb5+–) 25.Ra1 g6 (25...a2+–) 26.Rca3 Ra3 27.Ra3 (27.Ra3 Nc6 28.Bb5+–) 1–0. Janek – Erberg, internet free game, 2017.

4.Nf3 c6 5.a4 a5 (5...e6 6.a5=) 6.b5 c5 (6...e6 7.Nc3=) 7.c4 (7.Be2+=) 7...d4 (better 7...e6!?=) 8.ed4+– cd4 9.Nd4 (9.Bd4 e6+–) 9...Nd7 (9...e6 10.Nc2+–) 10.Nf3 (10.Nc6 Qc7+–) 10...Ngf6 11.d4 e6 12.Be2 (12.Bd3 Bb4 13.Nbd2 Nh5+–) 12...Bb4+= 13.Nbd2 (13.Bc3 Bd6+=) 13...Ne4 14.0–0 Ndf6 (14...Nd2 15.Nd2 Bg2 16.Kg2 Qg5 17.Kh1 Bd2 18.Rg1+=) 15.Ne4+– Ne4 16.Qc2 (better 16.Rc1+–) 16...g5? (better 16...Rc8!?+–) 17.Bd3 (17.d5!? Nf6 18.Ng5 Rg8 19.Nh7 Nd7+–) 17...Nf6 18.Ne5 (18.Ng5 Rg8 19.Ne4 Rc8+–) 18...g4 (18...Rc8 19.Qe2+–) 19.f3 (19.d5 ed5 20.Ng4 d4+–) 19...h5 (19...gf3 20.Nf3 Qe7+–) 20.fg4 hg4? (20...Ng4 21.Nf7 Qc7+–) 21.d5 (21.Bg6!? Qe7 22.Nf7 Rf8+–) 21...ed5?? (21...Bc5 22.Rf2 ed5+= (22...Bf2 23.Qf2 g3 24.hg3 ed5 25.Re1+–)) 22.Rf6! Qf6 23.Rf1?? (better 23.Ng4 Qg5 24.Qe2 Kd7 25.Bf6+–) 23...Qh4 (better 23...Bc5 24.Rf2 g3–+) 24.g3?? Attacking the backward pawn on f7 (better 24.Ng4 Bc5 25.Kh1=+) 24...Bc5–+ 25.Kh1 d4 (better 25...dc4 26.Nc6 cd3–+) 26.Nc6 (26.Nc6 Qg3 27.Bf5–+). GuestWVRG – Discanto, freechess.org, 2018.

4.Nf3 c6 5.c4 dc4 6.Bc4 e6 7.0–0 (7.Qb3 Nf6=) 7...Nf6 (7...Bb4?? 8.Bg7 a6 9.d4+–) 8.b5 (8.a3 Bd6=) 8...c5 (8...Bd6 9.d3=) 9.d4 cd4 10.Nd4 Be7 (10...Bd6 11.Qe2 0–0+=) 11.Be6 (11.Qe2!?+=) 11...fe6=+ 12.Ne6 Qd1 (12...Qc8!? 13.Ng7 Kf8=+) 13.Rd1= Nd5 (13...Nbd7!? 14.Nc7 Kf7 15.Na8 Ra8+=) 14.e4+– (14.Bg7?! Rg8 15.e4 Nf6 16.Nc7 Kf7 17.Bf6 Bf6=) 14...Nb4 15.Ng7 (15.Nc7 Kf7 16.Na8 Ba8+=) 15...Kf7+= 16.Nf5 Re8 17.Nc3 a6? (17...Bf8 18.Rd2+–) 18.a3 (18.Ne7!? Re7 19.a3 Nc2+–) 18...Nc2+– 19.Ne7 Na1 20.Nf5 Nc2 (20...Re6 21.ba6 Ra6 22.Ra1+– (22.Ba1?! Ra3 23.Bb2 Rb3+–)) 21.Nd6 Ke7 (21...Kf8 22.Nb7 ab5 23.Nd6+–) 22.Nb7 ab5 (22...Kf8 23.Nd6 Rd8 24.Rd2 ab5 25.Ncb5+– (25.Rc2?! Rd6 26.f4 Na6+–)) 23.Nd5 (worse 23.Nb5 Rc8+–) 23...Ke6 (23...Kf8 24.Nd6 Rd8+–) 24.Nc7 Ke7 25.Na8 Nd7 (25...b4 26.Nc7 ba3 27.Ba3 Na3 28.Ne8 Ke8 29.Rd8 Kf7 30.Rb8+–) 26.Nc7 b4 1–0. GuestVTXR – GuestRLQZ, freechess.org, 2019.

4.Nf3 c6 5.Be2 Nd7 6.a3 g6?? (6...Qc7 7.c4+=) 7.0–0 (better is 7.Bh8 Ngf6 8.d4+–) 7...f6 (7...Ngf6 8.Nc3+=) 8.c4 (8.Ng5 Qb8+/–) 8...e6 (8...e5 9.Nc3+=) 9.cd5 ed5 10.Nc3 Bd6 11.h3 Qc7 12.Nd4 Bc8 13.Ne6 Ne5?? 14.Nc7+– Bc7 15.d3 Ne7 16.Rc1 0–0 17.f4 Nd7 18.Bg4 f5 19.Bf3 Ba6 20.Ne2 Rad8 21.Nd4 Rf6 22.a4 Bb7 23.b5 c5 24.Nb3 Rc8 25.Bf6 Bd6 26.Be7 Be7 27.Nd4! c4 28.dc4 dc4 29.Bb7 Rc5 30.Rc3 Bf6 31.Qd2 Bh4 32.Rfc1 Bg3 33.Rc4 Rd5 34.Qb4 Rc5+– 35.Rc5 bc5 36.Rc5 Nc5 37.Qc5 Kg7 38.Qe7 Kh6 39.Bf3 a5 40.Ne6 g5 41.Qg7 (41.Qg5) 1–0. Fournier,Frederic (1850) – temtation22, Active echecs21.com, 2004.

4.Nf3 e6 (--> 3.e3 e6 4.Nf3 d5).

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

4.Nf3 e6 5.b5 c5 6.c4 Nf6 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).

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

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

4.Nf3 e6 5.Be2 Nf6 6.b5 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 d5).

4.Nf3 c5

5.a3 a6 6.c4 e6 7.Nc3 (7.bc5 bc5 8.cd5 ed5=) 7...Nf6 (7...cb4 8.ab4 dc4 9.b5=) 8.d4 (better is 8.bc5!? bc5 9.cd5 ed5 10.Rb1=) 8...cb4–/+ 9.ab4 Bb4 10.Qa4 Nc6 11.Ne5 Qc7 12.Bd3? (12.Nc6 Bc3 13.Bc3 Bc6–/+) 12...0–0?? (better is 12...dc4 13.Nc6 Qc6 14.Qb4 cd3–+) 13.Nc6–/+ Bc6?? 14.Qb4+– dc4 15.Bc4 Bg2 16.Rg1 Qh2 17.0–0–0 Rfc8 18.Kb1 b5 19.Bd3 a5 20.Qb5 Rab8?? 21.Qg5+– Rb2?? 22.Kb2 Qb8 23.Ka1 Rc3= 24.Rd2?? Ra3–+ 25.Ra2 Ra2 26.Ka2–/+ Bd5 27.Ka1 Ne8 28.Rb1 Qd6 29.Kb2 Qb4 30.Kc2= Qc3?? 31.Kc3+– (31.Kc3 g6 32.Qd8+–) 1–0. lendzior (1730) – greg1123 (1900), kurnik, 2012.

5.a3 Nc6 6.b5 Na5 7.d3 e6 8.Nbd2 Nf6 9.c4 Be7 10.Be2 0–0 11.0–0 Qc7 12.Rc1 Rad8 13.d4 dc4 14.Nc4 Nc4 15.Rc4 Qb8 16.Nd2 Nd5 17.Bf3 Bf6 18.Qb3 Ne7 19.Ne4 cd4 20.Nf6 gf6 21.Bd4 Bf3 22.gf3 e5 23.Bb2 Nf5 24.Rg4 Kh8 25.Kh1 Qb7 26.e4 Ne7 27.Rfg1 Ng6 28.Bc1 1–0. karoo54 (1695) – llabirt (1625), kurnik, 2012.

5.b5 c4 6.d3 cd3 7.cd3 (7.Bd3 a6+=) 7...e6 8.Be2 Nd7 9.0–0 Bd6?? (better is 9...Ngf6+=) 10.Bg7+– d4 (10...Ngf6 11.Bh8 a6 12.Nc3+–) 11.Bh8 Bf3 12.Bf3 Rc8 13.Bc6 e5 14.ed4 ed4 15.Bd4 Bh2 16.Kh2 Qh4 17.Kg1 Qd4 18.Nd2 Ngf6 19.Ne4 Kf8 20.Bd7 Nd7 21.Qg4 Re8 22.Qf4 Re5 23.Qh6 Kg8 24.Qd6 Re4 25.Qd4 Rd4 26.Rad1 Nc5 27.Rfe1 Nd3 28.Re3 Rb4 29.Red3 Rb5 30.Rd7 Ra5 31.R1d2 a6 32.R7d6 b5 33.Rb6 Ra4 34.Rb7 b4 35.Rdd7 a5 36.Rf7 Ra2 37.Rg7 Kf8 38.Rbf7 Ke8 39.Ra7 Kf8 40.Rh7 Kg8 41.Rhc7 Ra1 42.Kh2 Re1 43.Rc8 Re8 44.Re8# 1–0. lousse (1625) – mariuszkisiel (1675), kurnik, 2011.

5.b5 Nf6 6.Be2=.

5.Bb5 Bc6 6.Bc6 Nc6+=.

5.bc5 bc5 6.Nc3 (6.Bb5 Bc6 7.a4+=) 6...d4 (6...a6!?+=) 7.ed4+/– cd4 8.Nb5 Nc6 (8...Nf6 9.Rb1+/–) 9.Nbd4 (worse is 9.Bd4 a6–/+) 9...Nd4 (9...e6 10.Rb1+/–) 10.Nd4 (10.Bd4 a6+–) 10...Nf6 (10...a6 11.Rb1 Nf6 12.Nf5+/–) 11.Bb5 Nd7 12.0–0 (better is 12.Qh5 Qc8 13.0–0+–) 12...e6? (better is 12...a6 13.Ba4 Rb8+–) 13.Qh5+– Be7 14.Ne6 Qb6 15.Ng7 Kf8 16.Ne6! Qe6 17.Bh8 Qg6 18.Qg6 hg6 19.Bd7 f6 20.Be6 Rd8 21.c4 Rd2 22.Rfb1 Be4 23.Rb8 Bd8 24.Bf6 Ke8 25.Re1 Rd6 26.Bg4 Rf6 27.Re4 Kf7 28.Rd8 Rb6 29.Rf4 Ke7 30.Rd7 Ke8 31.Re4 Kf8 32.Kf1 Rb2 33.Ra7 Rc2 34.a4 Rb2 35.a5 Rb4 36.a6 Ra4 37.Rf4 Kg8 38.Be6 Kh8 39.Rh4# (39.Rf8#) 1–0. COMP – NN, internet, 2002.

4.Nf3 Nc6

5.a3 e5 6.b5+– Na5 7.Ne5 Nc4? (better 7...Nf6!?+–) 8.Nf7!+– (8.Bc4?! dc4 9.Qg4 Nh6 10.Qc4 Bg2+–) 8...Kf7 9.Qf3 Nf6 10.Bc4 dc4 (10...Bd6 11.0–0+–) 11.Qb7 Bb4?? (11...Be7+–) 12.ab4 Nd5 (12...Re8 13.Bf6 Qf6 14.Qc7 Kf8 15.Nc3+–) 13.Nc3 Nb4 14.Qe4 Re8 (14...a5 15.ba6 Kf8 16.Ba3+–) 15.Qc4 Kf8 (15...Re6 16.Qb4 Qd7 17.Ne2+–) 16.Qb4 Kg8 17.Qc4 Kh8 18.Nd5 Rc8 (18...c5 19.bc6 Qg5 20.0–0+–) 19.Ra7 Re5 20.Be5 (20.Be5 Qg8 21.Qg4+–) 1–0. Adlai – Patzer, internet, 2021.

5.a3 e6 6.Be2 Qd7 7.b5+= Na5 8.Ne5 Qe7 9.Bd3 (9.Bc3 c5+=) 9...0–0–0 10.Bc3 (10.Qh5 Nh6=) 10...c5 (10...f6!? 11.Nf3 Nc4=) 11.Qh5 c4 12.Be2 (worse 12.Nf7 cd3 13.Ra2 d4 14.Nd8 A) worse 14...dc3 15.Nb7 Nf6 16.Qf3 Qb7 17.Qb7 Kb7 18.cd3+– (18.Nc3?! dc2 19.Ke2 Nc4=; worse 18.dc3 dc2 19.Rc2 Nc4=); B) 14...Bg2–/+) 12...g6 (better 12...Nh6!?+=) 13.Qh3+– Bg7 (better 13...Nf6 14.Ng4 Bg7+–) 14.Nc6 Nc6? (14...Qf8 15.Nd8 Kd8+–) 15.Bg7 (15.bc6?! f5 16.cb7 Qb7+–) 15...Nf6 16.bc6 Bc6 17.Qh4 Rhg8 (17...Ng8 18.Qf4 g5+–) 18.Bf6 Qe8 (18...g5 19.Qh6 Qf8 20.Qh7+–) 19.Bd8 Qd8 20.Qh7 Rf8 (20...Qf8 21.Qh3+–) 21.Qg7 Qe7 22.Nc3 e5 23.0–0 d4 (23...Rd8 24.f4 d4 25.Nd1 de3 26.de3+–) 24.ed4 ed4 25.Qd4 Rd8 (25...Qg5 26.f3+–) 26.Qc4 Kb7 27.d4 f6 28.a4 g5 29.a5 Qd6 30.ab6 ab6 31.Qa6 Kc7 32.Nb5 Kd7 33.Qa7 Ke6 34.Bc4 Bd5 35.Nd6 Kd6 (35...f5 36.Qf7 Kd6 37.Qd5 Kc7 38.Ra7 Kc8 39.Qb7) 36.Qb6 Bc6 37.Qd8 Bd7 38.Ra6 1–0. Terry the Ing – Nto52, internet, 2019.

5.a3 e6 6.Be2 Nf6 7.0–0 a6 8.c4 dc4 9.Bc4 b5 (9...Bd6 10.Nc3+=) 10.Be2 Bd6 11.Nc3 Nd5? (better 11...0–0+=) 12.Nd5+– ed5 13.Bg7 Rg8 14.Bb2 Qd7 15.g3 h5 16.Qb1 Qg4 (16...Qe6 17.Nd4 Nd4 18.Bd4+–) 17.Nd4 Qg5 (17...Qg6 18.Bd3 Qg4 19.Nc6 Bc6 20.Bh7+–) 18.f4 Qh6 (18...Qg6 19.Bd3 Qg4 20.Nf5+–) 19.Nf5 Qe6 20.Nd6 Qd6 (20...cd6 21.Bh5 Qh3 22.Bf3+–) 21.Bh5 Ne7 (21...Qd7 22.Qh7 0–0–0 23.Qf7+–) 22.Qh7 0–0–0 (22...Rf8 23.Rac1 d4 24.Bd4+–) 23.Bf7 Rgf8 24.Be5 Qc6 (24...Qb6 25.Bd4 Qd6+–) 25.Rac1 Qb6 26.Rc7 Kb8 27.Rc6 (27.Rc6 Ka7 28.Rb6+–) 1–0. Faygan – Scania, internet private, 2018.

4.Nf3 Nd7

5.c4 dc4 6.Bc4 e6 7.a3 Ne7 (7...Ngf6 8.Nc3=) 8.0–0+= Nd5 (8...c5 9.d4+=) 9.Qc2 (9.Nc3+=) 9...f6 (9...N5f6 10.Ne5=) 10.Qd1 (10.e4 Nf4+–) 10...e5 (10...c5 11.bc5 Bc5 12.e4+=) 11.d4+– ed4 (11...e4 12.Nh4 g6 13.Qb3+=) 12.Nd4 Ne5 (better 12...Ne7!?+–) 13.Ne6+– Qd6? (13...Nc4 14.Nd8 Nb2+–) 14.Bd5 Bd5 15.Qd5!! Ke7 (15...Qd5 16.Nc7 Double attack (16.Nc7 Decoy)) 16.Qa8 Ke6 1–0. GuestBGWD – GuestNVLN, freechess.org, 2016.

5.c4 dc4 6.Bc4 Ndf6? 7.Ne5 (7.0–0 e6+–) 7...e6+– 8.Bb5 Ke7 (8...c6 9.Nc6 Qd5 10.Nd4 Nd7 11.f3+–) 9.Nc6 (9.Na3 Qd5 10.Qc2 Rc8 11.Nc6 Ke8 12.Na5 Nd7 13.Nb7 Qb7+–) 9...Bc6 10.Bc6 Rb8 (10...Nd5 11.b5 f5 12.Ba8 Qa8 13.Na3+–) 11.Qa4 (11.b5 Nd7+–) 11...Nd5 12.Nc3 Ngf6? (12...Nc3 13.dc3 Kf6+–) 13.b5 Ng4 (13...Qc8 14.Qh4 Nc3 15.Bc3 e5 16.Be5 Qf5+–) 14.Nd5 ed5 15.Qg4 f6 16.Qf5 Kf7 17.Bd5 Ke7 (17...Ke8+–) 18.Qe6 1–0. Leonco – Gonce, internet corr, 2018.

5.c4 c5 6.bc5 Nc5 (6...bc5 7.cd5 Bd5 8.Nc3+=) 7.d4 (7...Nd7 8.cd5+/–). Fahrudin87 (2015) – Ramiz, internet, 2006.

5.c4 c6 6.Be2 e5 (6...dc4 7.Bc4 e6 8.0–0=) 7.Ne5 (7.cd5 Ngf6 8.dc6 Bc6+–) 7...Qg5 (7...Ne5!? 8.Be5 Qg5+=) 8.Nf3 (8.Nd7 Kd7 9.0–0 Bb4+–) 8...Qg2 (8...Qg6!?+–) 9.Rg1+– Qh3 10.Bg7 (10.Rg7 f6 11.Rg3 Qh6+–) 10...Bg7+– 11.Rg7 c5 (better 11...Qh6 12.Rg3 Ngf6+–) 12.Ng1 (better 12.cd5 Qh6 13.Rg5+–) 12...Qh2= 13.Bh5?? (13.d4!?=) 13...0–0–0 (better 13...Ne5 14.Be2 dc4–+) 14.cd5?? (14.Na3 Ngf6 15.Bf3 Rdg8 16.Rg8 Rg8–+ (16...Ng8?! 17.Ke2–/+)) 14...Bd5 (14...Qe5 15.Rf7 Qa1 16.bc5 Bd5 17.cb6 ab6 18.Rf4–+) 15.Bf3?? (15.Nc3 Bg2 16.Nce2 Nh6=) 15...Bc4 (better 15...Qe5 16.Rf7 Bf7–+ (16...Qa1?! 17.Bd5 Ne5 18.Nc3 Qd1 19.Kd1 Nf7 20.Bf7–+)) 16.Rg2= Qe5 (16...Qc7 17.Na3 Bd3 18.Rc1+=) 17.Nc3 (17.Qa4!? Bd5 18.Nc3 Bf3 19.Nf3+–) 17...cb4=+ 18.Ne4 f5 (18...Bd3 19.Ng5 Qe7 20.a3 ba3 21.Qc1 Nc5 22.Qa3=+) 19.Ng5 (better 19.d4!? Qc7 20.Nd2+=) 19...Nc5 (better 19...Kb8=+) 20.Be2?? (20.d4 Qc7 21.Be2 Bd5=+) 20...Bd5 (better 20...Rd2 21.Qb1 Rb2–+) 21.Rc1?? (better 21.N5f3 Qb2 22.d4=+) 21...Bg2–+ 22.N5f3 (22.d4 Qh2 23.N5f3 Qh1–+) 22...Qb2 23.Nd4 (23.Rc2 Qa3–+) 23...Be4 0–1. GuestCXLM – GuestCMLF, freechess.org, 2016.

5.c4 Ngf6 6.Nc3 e6 7.b5 c5 8.d3 (8.cd5 ed5 9.Be2 Bd6=) 8...dc4 9.dc4 Be7 10.Qc2 Qc7 11.Be2 0–0 12.0–0–0 (12.0–0!?=) 12...a6 (12...Rfd8 13.Rd2+=) 13.h4 (13.Kd2+=) 13...Ng4 (better is 13...Rfd8–/+) 14.Ng5+= Ngf6 15.ba6 Ra6 (15...Ba6 16.Nb5 Bb5 17.Bf6 Nf6 18.cb5–/+) 16.Nb5 Qb8? (16...Qc8 17.Rd7 Be4 18.Ne4 Nd7+/–) 17.Rd7!+– Ra2? (17...Nd7 A deflection 18.Qh7 A beautiful mate combination) 18.Re7 h6 (18...Bg2 19.Rd1 h6 20.Nc3 Rb2 21.Kb2 hg5 22.hg5+–) 19.Bf3 Bf3 20.gf3 (better is 20.Nf3 Qd8 21.Rb7 Qa8 22.Rb6 Rd8+–) 20...Qd8 (20...hg5 21.hg5 Rb2 22.Qb2+–) 21.Ra7 (21.Ra7 Ra7 22.Bf6 Ra1 23.Ba1 hg5 24.hg5+–) 1–0. De Visser,Arno – Benschop, Noordkop, 1993.

5.Be2 Ngf6 6.c4 e6 7.b5 dc4 8.0–0 g6 (8...a6 9.ba6 Ba6 10.Qc2=+) 9.a4 Bg7 10.Bc4 0–0 11.d4 (11.Qe2 c5=) 11...c5 (11...Rc8 12.Qe2=) 12.Nbd2 (12.bc6 Bc6 13.Nc3 Qc8+=) 12...cd4 13.Nd4 Nc5 14.Ba3 (14.Qc2 Rc8=) 14...Rc8 15.a5 (15.Rc1 Qd7=) 15...Re8 (15...ba5 16.N2b3 Nb3 17.Qb3=+) 16.Rc1 Qd7 (16...ba5 17.Nc6 Bc6 18.bc6=) 17.ab6 (17.Qe2 ba5 18.Rfd1 Bf8=) 17...ab6 18.Qe2 Red8 19.Rfd1 Bd5 20.f4 Qb7 21.Bd5 Nd5 (worse 21...Qd5 22.Nc6 Rc6 23.bc6 Qc6 24.Bc5 bc5 25.Qc4+–) 22.Nc6 Nc3 23.Rc3 Bc3 24.Nd8 Rd8 25.Nc4 Ra8 (25...Rd1 26.Qd1 Qe4 27.Bc5 bc5 28.Qb3=) 26.Bc5 bc5 27.Nd6 Qb6 28.Ne4 Bg7 29.Qc4 Exerts pressure on the isolated pawn 29...Rb8 The isolani on b5 bECOvvvmes a target 30.Rb1 (30.Nc5? Rc8–+ (30...Qb5? 31.Qb5 Rb5 32.Rd8 Bf8 33.Nd7+–); 30.Qc5?! Qc5 31.Nc5 Bf8=) 30...Rc8 31.Kf2 Kf8 (31...f5!? 32.Ng5 Re8=) 32.Rd1+= Rb8 33.Rd7 Qb5 (33...Ke8 34.Qd3+– (34.Nc5?! h5=)) 34.Rf7!+– (34.Qc5?! Qc5 35.Nc5 h6=) 34...Kg8 (34...Kf7 35.Nd6 A double attack) 35.Qe6 Re8?? (better 35...Qb2 36.Kf3 Qb3 37.Re7 Qe6 38.Re6 Rc8+–) 36.Re7 (36.Re7 Kh8 37.Re8 Qe8 38.Qe8 Bf8 39.Qf8) 1–0. onur604 (2320) – fightart (2125), lichess.org, 2020.

5.c4 e6

6.cd5 ed5 A) 7.b5 Ngf6 (7...a6 8.Qc2 Ne7 9.ba6 Ba6 10.Ba6 Ra6 11.0–0 Nc5 12.Rc1 Nc6+= 0.28) 8.Nd4 a6 9.Nc6 Bc6 10.bc6 Nb8 11.Qa4 Ne4 12.Bd4 Qh4= –0.19; B) 7.Bd3 Ngf6 8.a3 c5 9.bc5 bc5 10.Nc3 Rb8 11.0–0 d4 12.Na4 Bc6= –0.22; C) 7.Be2 C1) 7...Bb4 8.Bg7 Ngf6 (8...Bd6 9.Bh8 Ngf6 10.Nc3 a6 11.0–0 Kf8 12.Qb3 c5+– 4.72) 9.Bh8+– Kf8 10.Qb3 c5 11.0–0 Kg8 12.Bf6 Nf6+– 4.72; C2) 7...Ngf6= 8.a3 c5 9.bc5 bc5 10.0–0 Be7 11.Nc3 0–0 12.Rb1 Re8= 0.09.

6.Be2 Bb4?? 7.Bg7 dc4 8.Bc4 +–.

6.Be2 dc4 A) 7.0–0 b5 (7...Ngf6 8.b5 a6 9.Bc4 ab5 10.Bb5 Bd6 11.Bd7 Qd7 12.Bf6 gf6+= –0.38) 8.a4 a6 9.Na3 c6 10.d3 c5 11.bc5 Nc5 12.dc4 Qd1+= –0.44; B) 7.Bc4 Ngf6 8.a3 c5 9.bc5 Rc8 10.d4 bc5 11.Nbd2 cd4 12.Bd4 Qa5= –0.25.

6.Be2 Ngf6

7.a3 dc4 8.Bc4 c5 9.bc5 Rc8 10.d4 bc5 11.dc5 Bc5 12.Nbd2 0–0=.

7.a3 Bd6 8.0–0 dc4 9.Nc3 a5 10.b5 Ng4 11.Qc2 Ra7 12.Ne4 Bh2+=.

7.a3 Be7 8.0–0 0–0 (8...dc4 9.Bc4 0–0 10.d4 c5 11.dc5 bc5 12.b5 Nb6= –0.13) 9.d4 a5 (9...dc4 10.Bc4 c5 11.dc5 bc5 12.b5 Nb6= –0.13) 10.b5 (10.c5 ab4 11.ab4 Ra1 12.Ba1 c6= 0.06) 10...Ne4 (10...c5 11.Nbd2= Rc8 12.Rc1 Re8= 0.00; 10...Rc8 11.Ne5 Ne5 12.de5 Ne4= –0.13) 11.Nbd2 Nd6 (11...Nd2 12.Nd2 c5 13.bc6 Bc6 14.cd5 Bd5 15.Rc1=) 12.Qc2 (12.cd5!? Bd5 13.Bd3+=) 12...dc4= 13.a4 Rc8 14.Nc4 (14.Ne5 f6 15.Nc6 Bc6 16.bc6 Nb8 17.Bc4 Nc4 18.Qc4 Qd5=) 14...Nc4 15.Qc4 c6 16.Qb3 (16.Rac1 Bd6=) 16...cb5 17.ab5 Nf6 18.Ne5 (18.Rfc1 Rc1 19.Rc1 Qd6=) 18...Qd5 19.Qd5 Bd5 20.Rfc1 Bd6 (20...Rc1 21.Rc1 Ra8 22.Ra1=) 21.Nc6 Rc7 22.Ba3 Ba3 23.Ra3 Ra8 24.f3 Ne8 25.e4+= Bc6 26.Rc6 Rc6 27.bc6 Nc7 28.Rb3 Rb8 29.Bb5 Kf8 30.Kf2 Ke7 31.e5 Nb5–/+ 32.Rb5 Kd8 33.d5 Kc7 34.d6 Kc6 35.Rb2 Rb7 36.Ke3 b5 37.Kd4 b4 38.Kc4 Rb5 39.f4 Rc5 40.Kb3 f6 41.Rd2 Kd7 42.Re2 Rc3 43.Ka4 Ra3 44.Kb5 b3 45.Rb2 a4 46.Kb4 Ra2 47.Kc3 Ra1 48.Re2 Rb1 49.Kb4–/+ Ra1 50.Kc3 fe5 51.fe5 Kc6 52.Rd2= Kd7 53.Re2 Rf1 54.Kb4–/+ Rf4 55.Ka3 Rd4 56.Rf2 Kc6 57.Rf7 Kd5 58.Rg7 Ke5 59.d7 Rd2 60.Ka4?? b2–+ 61.d8Q Rd8 62.Rg5 Kd4 63.Rg4 Kc3 64.Rg3 Kc2 (64...Kc2 65.Rb3 Ra8 66.Kb4 Rb8 67.Kc5 Rb3–+) 0–1. Vukovic,Ljubomir (1975) – Vujosevic,Dimitrije (2090), Knjaz Milos Jezero Open, Belgrade SCG, 2004.

7.a3 g6 8.0–0 Bg7 9.d4 0–0 10.Nbd2 Rc8 11.Rc1 Re8 12.Qc2 dc4 13.Bc4 c5 14.dc5 bc5 15.b5 Nb6 16.Be2 Be4 17.Qb3 Qc7 18.Ne4 Ne4 19.Bg7 Kg7 20.Qb2 Kg8 21.Rfd1 Red8 22.Ne5 Rd1 23.Rd1 Rd8 24.Nc6 Rd1 25.Bd1 Qd7 26.Bf3 Nd2 27.Be2 c4 28.h3 a6 29.Qf6 Nc8 30.a4 ab5 31.ab5 Ne4 32.Qe5 Ncd6 33.Bc4 Nc4 34.Qe4 Qd1 35.Kh2 Qd5 36.Qd5 ed5 37.Kg3 Kf8 38.Kf3 Ke8 39.Kf4 f6 40.g4 Kd7 41.g5 f5 42.f3 Kd6 43.e4 d4 44.Nd4 Kc5 45.Ne6 Kb5 46.ef5 gf5 47.Kf5 Kc6 48.g6 Kd6 49.gh7 1–0. barborski – arquivox, kurnik, 2012.

7.cd5 Nd5 8.b5 c6= 9.a4 Bc5 10.a5 ba5 11.Bg7 Rg8 12.Bd4 Bd4=.

5.Be2 f6?

6.0–0 e5 7.a3 Ne7 8.d3 Ng6 9.Nbd2 c5 10.b5 Bd6 11.c4 d4 12.e4 0–0 13.Bc1 a6 14.g3 ab5 15.cb5 Qe8 16.Nc4 Bc7 17.Nfd2 h6 18.Bh5 Kh7 19.Nf3 Qe7 20.Bg6 Kg6 21.Nh4 Kh7 22.Qh5 Qf7 23.Qf5 g6 24.Qf3 (24.Ng6!? Qg6 25.Qd7 Rf7 26.Qh3+=) 24...Bc8 (24...f5 25.Qe2–/+) 25.Ng2 Nb8 26.h4 h5 27.a4?? (better is 27.Qe2+=) 27…Bg4–+ (27...Bg4 28.Qg4 hg4–+) 0–1. ejdrzej (1705) – rdian, kurnik, 2011.

6.0–0 e5 7.a3 Ne7 8.d3 Ng6 9.Nbd2 Bd6 10.c4 c6 11.cd5 cd5 12.Rc1 0–0 13.Qb3 Kh8 14.d4 e4 15.Ne1 f5 16.g3 f4 17.Bh5 (17.Bg4 Nf6 18.Bf5 Ne7–/+) 17...fe3 18.Qe3 Qf6 (18...Nf4!? 19.Be2 Ne2 20.Qe2 a5–/+) 19.Ng2 (19.f3!? Qe6 20.Nc2=) 19...a5 20.b5 Qe7 (20...Qf5 21.Be2+=) 21.a4 (21.Bg6!? hg6 22.f3+=) 21...Rf6= 22.Qg5 Ndf8 23.Ne3 Bb4 24.Nb3 Rd8 25.Ng4?? h6 26.Qe3? Rf3 27.Qe2 Rb3 28.Ne5 Ne5 29.de5 Ne6 30.Bg4 Ng5 31.Qc2 Nf3 32.Kg2 Rd3 Black plans d4 33.Qc7 Qc7 34.Rc7 Ba8 35.e6 Re8 36.Rg7 d4 37.Rg6? Kh7 38.Rf6? Ne5 39.Bf5 Kg7 (39...Kg7 40.Rf7 Nf7 41.ef7 Kf7–+) 0–1. ejdrzej (1690) – mosioan, kurnik, 2011.

6.c4 e5 7.Nc3 Bb4 8.Nd5 Bd6+=.

6.Nd4 Qc8 7.0–0 e5 8.Ne6 +/–.

6.Nd4 Ne5 7.Ne6 (better is 7.Nc3!?+/–) 7...Qd6+= 8.Nf8 Nh6 (8...Kf8 9.Bc3+=) 9.Be5 (9.f4!? Nc4 10.Bc1+/–) 9...fe5= 10.Nh7 Rh7 11.Bh5 (11.Nc3!?=) 11...g6+= 12.Be2 (12.Bf3 e4 13.Bg4 Nf5+= (worse is 13...Ng4 14.Qg4 Rh2 15.Rh2 Qh2 16.Qg6 Kd7 17.Qg4 Ke8 18.Qg7=)) 12...0–0–0–/+ 13.c3 Rf8 (13...d4!? 14.Bf3 Nf5–/+) 14.Na3= Qf6 (better is 14...Kb8=) 15.f3? (15.0–0!?=) 15...Ng4 (better is 15...Nf5!?–+) 16.h3?? Qh4 (16...Qh4 17.g3 Qg3 18.Kf1 Qf2#) 0–1. Gebert,Herbert (1635) – Kahler,Kurt (1740), Bad Woerishofen op Seniors, 2001.

4.Nf3 f6

5.b5 e6 6.c4 Nd7 (6...a6 7.Nd4 Qd7 8.cd5 Bd5 9.Nc3=) 7.cd5 ed5 8.Nc3 Qe7 (8...Ne7 9.Nd4+=) 9.Be2+– 0–0–0 (9...Qf7 10.0–0+–) 10.0–0 Kb8 11.a4 g5 (11...Qb4!? 12.Qc2 Qa5 13.Rfc1+–) 12.a5+– h5 13.ab6 cb6? (13...ab6 14.Qa4 Kc8 15.Qa7+–) 14.Ba3 (14.Qa4 Kc8+–) 14...Qh7 (14...Qf7 15.Qa4 Ba3 16.Qa3+– (worse 16.Ra3 Ne7+–)) 15.Qa4 Kc7 (15...Nc5 16.Bc5 bc5 17.Qa7 Kc8 18.Na4+–) 16.Bf8 (worse 16.Qa7 Nc5 17.Rfc1 g4+–) 16...Rf8 17.Qa7 Ra8 (17...Ne7 18.Rfc1 Nc5+–) 18.Nd5 Kc8 19.Rfc1 Kd8 20.Qb7 Rb8 21.Qc7 (21.Qc7 Ke8 22.Nd4+–; better 21.Ra8 Ke8 22.Ng5+–) 1–0. aravind555 – Tekstopisac, lichess.org, 2018.

5.c4 dc4 6.Bc4+= Bd5 7.Be2 (7.Bd5 Qd5 8.Nc3 Qd7+=) 7...e5+= 8.a3 (8.Nc3 a6+= (8...Bb4? 9.Qa4 Nc6 10.Bb5+–)) 8...Bd6 (8...a5 9.Nc3 ab4 10.ab4 Ra1 (10...Bb4? 11.Ra8 Ba8 12.Qa4 Nc6 13.Bb5+–) 11.Qa1 Bb3= (11...Bb4? 12.Qa4 Nc6 13.Nd5 Qd5 14.Bb5+–)) 9.Nc3+= Bb7 10.0–0 Ne7 11.d4 ed4 (11...0–0 12.Qc2+/–) 12.Nd4 Bc8 13.Bc4 Be5 14.Ne4 Bd4 15.Bd4 c6?? (15...Bf5 16.Qh5 Bg6 17.Qf3+–) 16.Qb3 (better is 16.Bf6 Qd1 17.Rad1 gf6 18.Nf6 Kf8 19.Rd8 Kg7 20.Nh5 Kh6 21.Rh8+–) 16...Nd5 17.Rad1 Be6 18.Bb2 b5 19.Bd5 Bd5+/– 20.Qc3 0–0 21.Nc5 Qe7 22.Rfe1 Kh8 23.e4 Bf7 24.e5 Bd5 25.ef6 Qf6 26.Qf6 gf6 27.f3 a5+/– 28.ba5 Ra5 29.Re7 b4? 30.ab4 Ra2 31.Bd4 Bg8 32.Ne4 Bb3 33.Re1 Bd5 34.Nf6 Rd2 35.Rh7# 1–0. vihavald (1670) – shemi2008, kurnik, 2012.

5.c4 e5 6.a3 e4 (6...Bd6 7.cd5 Bd5 8.Nc3+=) 7.Ng1 (7.Nd4 c5 8.Ne6 Qd6 9.cd5 Bd5 10.Qh5 Ke7+/–) 7...Ne7 8.cd5 Bd5 9.Nc3 c6 10.Nge2 Bc4 (10...a5!?+=) 11.Ne4+/– Nf5 12.Rc1 b5 13.Qc2?? (better is 13.Nd4 Bf1 14.Rf1 (14.Nf5 Bg2 15.Qh5 g6 16.Nf6 Qf6 17.Bf6 gh5–/+) 14...Nd4 15.Bd4+– (15.ed4?! Qd5 16.Qe2 Kd8=)) 13...Na6?? (better is 13...Bd3 14.Nf6 gf6 15.Bf6 Qf6 16.Qd3 a5+=) 14.Nf6!+– gf6 15.Qf5 Annihilates a defender: f5 15...Bg7 16.Nd4 Bf1 17.Rf1 0–0 18.Nc6 Qd6 19.Nd4 Nb8 20.Qe6 Qe6 21.Ne6 Rf7 22.Nc7 Rc7 23.Rc7 Na6 24.Rd7 Rc8 25.Kd1 Nb8 26.Ra7 Nc6 27.Rb7 Ne5 28.Be5 fe5 29.Ke2 e4 30.Rb6 Rc2 31.Rb5 Bb2 32.a4 Bc3 33.Rd5 Bb4 34.a5 Kf7 35.Rd1 Ke6 36.Rh5 Rc7 37.a6 Ra7 38.Rb1 Bd6 39.Rb6 Rf7 40.Rb7 Rf8 41.Rhh7 Kd5 42.a7 Kc6 43.h4 Rc8 44.h5 Bc7 45.Rbc7! Rc7 Theme: Deflection from a8 46.Rc7 Kc7 47.a8Q (47.a8Q Kd6 48.h6 Kc7 49.h7 Kd7 50.h8Q Kd6 51.Qac8 Kd5 52.Qd4#) 1–0. vihavald (1650) – shemi2008, kurnik, 2012.

5.c4 e5!? 6.Bc3 a6=.

5.d4 g6 6.Bd3 Bg7 7.c4 c6 8.c5 a5 9.a4 ab4 10.Qd2 bc5 11.dc5 Na6 12.Ba6 Ba6 13.Qb4 Nh6 14.Qd2 0–0 15.Nd4 Qd7 16.Ne2 Rab8 17.0–0 Rb2 18.Qb2 f5 19.Nbc3 Be2–+ 20.Qe2 Bc3 21.Ra2 e5 22.a5 f4 23.a6 e4 24.ef4 Bd4 25.Rc1 Ra8 26.Qd2 Nf5 27.Rb1 e3 28.Qc2 ef2 29.Kf1 Qe7 30.Rb7 Qe1# 0–1. xnajlepszyx (1610) – greg1123 (1720), kurnik, 2011.

4.Nf3 Nf6

5.b5 a6 6.Bd4=.

5.b5 Nbd7 6.a4 g6 7.Be2+= Bg7 8.0–0 0–0 9.c4 (9.Bd4 a6=) 9...e6 (9...c5 10.cd5 a6 11.ba6 Bd5 12.a5+=) 10.Nc3 (10.cd5 Bd5 11.Nc3 c5+=) 10...c5 (10...dc4 11.Ba3 Re8 12.Bc4=) 11.bc6 Bc6 12.cd5 (12.d4 dc4 13.Bc4 Ne4+=) 12...Nd5 13.d4 Nc3 14.Bc3 Nf6 (14...Qf6 15.Rc1 Bd5 16.Bd3=) 15.Bb4+= Re8 16.Ne5 (16.Rc1 Qd5+=) 16...Bb7 17.Bb5 Qd5 18.f3 Rec8 19.Be7 (better 19.Qe2+=) 19...Nd7?? (better 19...Rc7 20.Ba3 Rac8=) 20.e4+– (worse 20.Nd7 Bc6 21.Bc6 Rc6 22.Nf6 Bf6 23.Bf6 Rac8+–; worse 20.Bd7 Rc7 21.e4 Qa5+–) 20...Qb3 (20...Qd4 21.Qd4 Ne5+–) 21.Qb3 (21.Qb3 Ne5 22.de5 Be5 23.Rac1+–) 1–0. DEFFM – jakkspratt, freechess.org, 2018.

5.d4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.d4).

5.Bd4 e6 6.a3 Be7 7.Be2 0–0 8.Ne5 Nbd7 9.0–0 c5 10.bc5 (10.Nd7 Nd7 11.Bc3 Bd6=+) 10...bc5 11.Bb2 Rb8 12.Qc1 (12.Nd7 Nd7 13.Ra2 d4=+) 12...Qc7 (12...d4 13.Nd3 Nb6 14.a4–/+) 13.Nf3 h6 14.Nc3 Bc6 (14...a6 15.Rb1=+) 15.d3 (15.a4 a5=+) 15...e5 Black prepares d4 16.Nd1 (16.Nh4 d4 17.Nd1 Nb6=+) 16...d4 (16...Bd6 17.Nh4=+) 17.e4 (17.c3 de3 18.Ne3 Bd6=+) 17...Nh7 (17...c4!? 18.dc4 Be4–/+) 18.Qd2 (18.c3 f5=+) 18...Ng5 19.Bc1 (19.c3 f5 20.Ng5 Bg5–/+ (worse 20...hg5 21.ef5 Rf5 22.Bg4+=)) 19...Nf3 20.Bf3 Bg5 (20...c4 21.dc4 f5 22.Qe2–/+) 21.Qe1 Qd8 22.Nb2 f5 (22...Bc1 23.Qc1 Qh4 24.c3–/+) 23.Nc4=+ Bc1 24.Rc1 f4 (24...Qh4 25.Nd2=+) 25.Na5 (25.c3!?=) 25...Bb5 26.Bg4 Nf6 27.Be6 Kh8 28.Bc4 (28.f3=+) 28...Qb6 (28...f3 29.Rb1 fg2 30.Kg2 Ng4–+) 29.Rb1= Qa6 30.f3 (30.Rb5 Rb5 31.a4 Qa5 32.ab5 Qc7=) 30...g5 (30...Bc4 31.Nc4 Rb1 32.Qb1=) 31.Qd2 Ne8? (better 31...g4+=) 32.a4+– Nd6? (32...Bc4 33.Rb8 Be6+–) 33.ab5 (33.Rb5?! Nb5 34.ab5 Qd6+–; 33.Bb5?! Nb5 34.ab5 Rb5+–) 33...Qb6 34.Nc6 Rbe8 35.Rb2 (35.Qa5 Qa5 36.Na5 Nc4 37.dc4 Re6+–) 35...Nc4 (35...a6 36.Ra1 ab5 37.Bd5+–) 36.dc4 a6 37.Qa5 (better 37.Ra1 ab5 38.cb5 c4+–) 37...Qb7 (37...Qa5 38.Na5 Ra8 39.b6+–) 38.Qa6 Rf7 (38...Qc7 39.Ra1+–) 39.Qb7 (better 39.Nd8! Qa6 40.Nf7 Kg7 41.ba6 Kf7+–) 39...Rb7 40.Ra1 Kg7 (40...Rc7 41.Rba2 Rcc8 42.Ra7+–) 41.Rba2 (41.b6!? Rf8+–) 41...Kf6 42.Ra6 Re6 (42...Kf7+–) 43.Nd8 Ra6 44.Ra6 (44.Ra6 Ke7 45.Nb7+–) 1–0. petrobbo (1945) – claymil (1990), ChessWorld.net, 2018.

5.Be2 Nc6 6.0–0 (6.b5!? Na5 7.0–0+=) 6...Nb4+= 7.c4 e6 8.Qa4 (better is 8.a3 Nc6 9.cd5 Nd5 10.Nc3+=) 8...Nc6?? (better is 8...Bc6 9.Qd1 dc4 10.Bc4 b5+=) 9.cd5 Nd5 10.Bb5 (10.Ne5 a6 11.Bh5+/– (11.Nc6?! Qd7+=)) 10...Nde7?? (better is 10...Ndb4!?+=) 11.Rc1 (better is 11.Ne5 a6 12.Bc6 (worse is 12.Nc6 Qd7 13.Ne7 ab5–/+) 12...Nc6 13.Nc6=) 11...Qd7? 12.Ne5+– Qd5 13.Nc6 Nc6 14.Bc6 Bc6 15.Qc6 Qc6 16.Rc6 Kd7 17.Rc2 f6 18.Na3 e5 19.Rac1 c5 20.d4 Bd6 21.d5 a6 22.e4 b5 23.Nb1 c4 24.Nd2 Rhc8 25.a3 Bc5 26.Kf1 Kd6 27.g3 Bb6 28.f4 Rf8 29.f5 Be3 30.Ke2 Bb6 31.Bc3 Rfc8 32.Bb4 Kd7 33.Nf3 Rc7 34.g4 Rg8 35.Ra2 Rb7 36.a4 Bc7 37.Bc5 Bd6 38.Bd6 Kd6 39.ab5 ab5 40.Nd2 Rc8 41.Rca1 Rcc7 42.Ra6 Kd7 43.Rb1 Rc8 ½–½. Labinska,Kinga – Burdzy,Joanna, MPJ, 2009.

3.e3 d6

4.a3 Nd7 (4...e5 5.Nf3=) 5.Nf3 e5 6.d4 Qe7 (6...e4 7.Nfd2=) 7.de5 (7.Be2 Ngf6+=) 7...de5= 8.Nc3 0–0–0 9.Qe2 f5 (9...Ngf6 10.Rd1=) 10.0–0–0 (10.e4 fe4 11.Ne4 Ngf6+=) 10...Ngf6 11.Nd2 g6 12.Qe1 (12.f3 a6=) 12...Bh6 Black prepares f4 13.Rg1 Rhe8 (13...Bg7 14.e4=+) 14.Bc4 f4 (14...a6 15.h3=+) 15.Qe2 (15.e4 Bg7=) 15...fe3 (15...e4 16.ef4 Bf4 17.Rge1=+) 16.fe3 Kb8 17.Ba6 (17.g4 Bg5=) 17...Nf8 (better 17...Be3!? 18.Bb7 Bd2 (18...Bg1? 19.Qa6 Nc5 20.bc5+–) 19.Rd2 Kb7=+) 18.Bb7= Kb7 19.Nb3 (19.Rgf1 e4=) 19...Ne6 (19...c6=+) 20.Qb5 (better 20.Na5 ba5 21.Qb5 Kc8 22.Qa6 Kb8 23.Qb5 Ka8 24.Qc6 Kb8 25.Qb5 Ka8 26.Qc6 Kb8 27.Qb5=) 20...Ng5?? (20...Be3 21.Kb1 Rd6 22.Rd6 cd6 (worse 22...Qd6 23.Na5 Kb8 24.Nc4+–; 22...Bg1?? 23.Na5 Kb8 24.Nc6 Kb7 25.Ne7+–) 23.Na5 Ka8=+) 21.Na5+– Ka8 (21...Kb8 22.Rd8 Qd8 23.Nc6 Kb7 24.Nd8 Rd8 25.Qe5 Rd6+–) 22.Qc6 Kb8 23.Qb7 1–0. FeegLood (2755) – lahav (1655), lichess.org, 2015.

4.b5 Nf6 5.Nf3 Nbd7 6.d4 g6 (6...e6 7.Bd3=) 7.Be2 Bg7 8.0–0 0–0 9.Nbd2 (9.c4 a6=) 9...a6 10.a4 ab5 (10...c5 11.bc6 Bc6 12.Bd3=) 11.ab5+= Ra1 12.Qa1 Qa8 (12...Qc8 13.Qa4+=) 13.c4 Qa1 (13...e6 14.Bd3+=) 14.Ra1 Ra8 15.Ra8 Ba8 16.Bd3 Nh5 (16...d5 17.cd5 Nd5 18.e4+=) 17.g4+– Nhf6 18.h3 (18.g5 Nh5+–) 18...h5 (18...h6 19.e4+=) 19.g5+– Ne8 (19...Nh7 20.Bc1+–) 20.Ba3 (20.Kf1 c5+–) 20...c6 21.Be4 (21.bc6 Bc6 22.Kf1 Nc7+=) 21...Nb8 22.c5 (22.Kf1 Nc7 23.Bd3 cb5 24.cb5 Kf8+=) 22...d5 (22...bc5!? 23.dc5 d5=) 23.Bd3+– Nc7? (better 23...bc5 24.Bc5 cb5 25.Be7 Bc6+=) 24.cb6+– Nb5 (24...Ne6 25.Be7 Nd7 26.Bb4+–) 25.Be7 Nc3 26.Bd8 Na4 27.Bc2 Nc3 28.Bd3?? (better 28.Nb3 Na6 29.Be7+–) 28...Na4+– 29.Bc2 Nc3 30.Nb3 Ne2 (30...Na6 31.Be7+–) 31.Kf1 Nc3 32.Nc5 Bf8 33.b7 (33.b7 Bb7 34.Nb7+–) 1–0. GuestLFBZ – GuestRFZX, freechess.org, 2018.

4.Bb5 Nd7 5.Nf3 a6 6.Ba4 e5 7.0–0 b5 8.Bb3 c5 9.bc5 dc5 10.d3 (10.Ne5 Ne5 11.Be5 Qg5+/–) 10...e4 11.Nfd2 Ngf6 12.a4 Bd6 (12...ed3!? 13.cd3 Be7=) 13.Ne4+/– Be4 (13...Ne4 14.de4 Qc7 15.ab5 (< 15.Bg7 Rg8 16.Bd5 Rg7 17.Bb7 Bh2 18.Kh1 Qb7 19.Kh2 Qe4–/+) 15...Bh2 16.Kh1+/–) 14.de4 Be5 15.Be5 Ne5 16.ab5 Ne4?? (better is 16...ab5 17.Ra8 Qa8+–) 17.Bd5 (17.Ra6?! c4 18.Ra8 Qa8+–; 17.ba6?! Qd1 18.Rd1 Ra7+–) 17...Nf2 (17...Rc8 18.Be4 ab5 19.Qd8 Rd8 20.Ra5+–) 18.Rf2 0–0 (18...Ra7 19.Ra6 Rd7 20.c4+–) 19.Rd2 Ra7 (19...Qg5 20.Ba8 Ra8 21.e4+–) 20.Bf7! Nf7 21.Rd8 Rd8 22.Qe2 a5 23.Nc3 Rad7 24.Qc4 h6 25.b6 Kh8 26.Qc5 Nd6 27.Qc6 Rf7 28.Ra5 Nb7 29.Ra7 Rdf8 30.h4 Nd8 31.Rf7 (31...Nf7 32.b7+–) 1–0. pcmvr (2110) – nay (2190), net–chess.com, 2006.

4.Bb5 Nd7 5.Nf3 a6 6.Be2 e5 7.0–0 Ngf6 8.d4 e4 9.Nfd2 d5 10.a3 Bd6 11.c4 c6 12.Nc3 0–0 13.Qc2 Qe7 14.Rfe1 Qe6 15.c5 bc5 16.bc5 Bc7 17.Na4 Rfb8 18.Rab1 Qf5 19.Bc3 Bc8 20.h3 Qg6 21.Bf1 Ra7 22.Nb3 a5 23.Rec1 h6 24.Qd2 Rab7 25.Ba5 Ba5 26.Qa5 Nf8 27.Nd2 Rb1 28.Rb1 Rb1 29.Nb1 Bh3 30.Qa8 N6h7 31.Qb8 Be6 32.Nb6 Ng5 33.Qg3 h5 34.Nd2 h4 35.Qh4 Nf3 36.Nf3 ef3 37.a4 fg2 38.Be2 Qc2 39.Bf3 Ng6 40.Qh2 Bf5 41.Kg2 Qd2 42.Qb8 Kh7 43.Qg3 Qe1 44.Kh2 Be6 45.Bh1 Kg8 46.Bg2 Bf5 47.Bf3 Be6 48.Kg2 Bf5 49.Qb8 Kh7 50.Qh2 Kg8 51.Kg3 Qd2 52.Qg1 Ne7 53.Qd1 Qc3 54.Bg4 Bc2 55.Qf1 Be4 56.Nd7 Ng6 57.Qd1 f5 58.Bh3 Bc2 59.Qh5 Qe1+/– 60.Qg5 Qg1 61.Bg2 Bd3 62.Nf6! Kf7 63.Nh5 Qe1? 64.Nf4+– Nf4 65.Qf4 Kg8 66.Kh4 Qd1 67.a5 Qg1 68.Qb8 Kf7 69.Qg3 Kf8 70.Kg5 1–0. Rooijen Van,Peter (1675) – Wicklund_Hansen,Gunnar (1835), SB–2011–0–00162, 2011.

4.d4 c5 5.bc5 dc5 6.c3 cd4 7.cd4 e5 8.Bb5 Bc6 9.Qa4 Qd6 (9...Qd5!? 10.Bc6 Nc6=) 10.Bc6 Nc6 11.de5 Qb4 12.Qb4 Nb4 13.Na3?? (better is 13.Kd2+=) 13...Nd3–+ 14.Ke2 Nb2 15.Nf3?? (15.Nb5 Rc8 16.Nd4–+) 15...0–0–0 16.Nb5 Bc5 17.Na7 Kb7 18.Nb5 Ne7 19.Rhb1 Nd3 20.a4 Nb4 21.a5 Nec6 22.ab6 Kb6 23.Nc3 Ra8 24.Na4 Kb5 25.Nc5 Ra1 26.Ra1 Kc5 27.Rc1 Kb5 28.Nd2? Ra8 29.f4 Ra2 30.g3 Na5 31.Rd1 Nc4 32.h4?! Nd2 33.Rd2–/+ Rd2 34.Kd2 Nd5 35.Kd3 Ne7 36.Ke4 Kc6 37.g4 Kc7 38.f5 Kd7 39.Kf4 Nd5 40.Ke4 Nc3 41.Kf4 Nd1 42.e4 Nf2 43.g5 Nd3 44.Ke3 Ne5 45.Kf4 f6 46.h5 Nd3 47.Kg4? Ke7 48.h6 gh6?? 49.gf6–/+ Kf6 50.Kh5 Kg7 51.Kg4? Ne5 52.Kf4 Kf6 53.Ke3 h5 54.Kf4 h4 55.Ke3 h5 56.Kf2 Ng4 57.Kg2 Ke5 58.Kh3 Ke4 59.Kh4 Nf6 60.Kg5 Ke5 61.Kh4 Kf5 62.Kh3 Kg5 63.Kh2 Kg4 64.Kh1 Ne4 65.Kh2 h4 66.Kh1 h3 67.Kh2 Nf2 68.Kg1 Kg3 69.Kf1 0–1. Fournier,Frederic (1675) – Sabangulov,Fyodor A, ChessOK.com, 2013.

4.d4 Nd7 5.c4 e6 6.Nf3 h6 7.Be2 Be7 8.0–0 Ngf6 9.Nc3 a6 10.a4 (10.d5 ed5+= (10...e5+=)) 10...d5 (10...0–0 11.Qb3+=) 11.c5 (11.cd5 Nd5 12.b5 ab5 13.ab5 Ra1 14.Qa1 0–0=) 11...bc5 (11...a5!? 12.ba5 bc5+=) 12.bc5+= (worse is 12.dc5 a5 13.Nd4 c6=) 12...0–0 13.Qb3 Rb8 14.Qc2 Ne4 15.Ne4 de4 16.Nd2 Nf6 17.Rab1 (17.Nc4 Nd5+=) 17...Bd5 (17...Qd7 18.a5+=) 18.Ba6+/– Nh5 (better is 18...Ra8!? 19.Be2 Bc6+/–) 19.Ne4+– Be4 (better is 19...Ba2+–) 20.Qe4 Nf6 21.Qf3 Nd5 22.Bc4 Rb2?? 23.Rb2 Nc3 24.Bb5 f5 25.Rc1 Nd5 26.Bc4 c6 27.Bd5 ed5 28.Rb6 Bg5 29.Rc6 f4 30.Rd6 Qa5 31.Qd5 Kh8 32.ef4 Bf4 33.Rf1 Bd6 34.Qd6 Rd8 35.Qe5 Qa4 36.d5 Re8 37.Qc7 Qe4 38.d6 Qa8 39.d7 Rb8 40.Rd1 Rd8 41.Qd6 Qa4 42.c6 (42.c6 Qa7 43.c7 Qa8 44.cd8Q Qd8 45.Qg6 Kg8 46.Qe8 Kh7 47.Qd8 h5 48.Rd6 g6 49.Qg5 Kg7 50.d8Q h4 51.Qg6) 1–0. the master 2 – java325, internet, 2011.

4.d4 e6 5.Nf3 Nf6 6.c4 d5 7.c5 (7.a3 c5 8.cd5 Bd5+=) 7...c6 (7...a5 8.a3=) 8.Nbd2 Nbd7 (8...a5 9.Qb3 ab4 10.Qb4=+) 9.Bd3 (9.Qb3 a5 10.ba5 bc5 11.Qb7 Rb8 12.Qc6 Rb2=) 9...g6 (9...a5!? 10.a3 Ba6 11.Ba6 Ra6=) 10.0–0+= Bg7 11.Qc2 b5 (11...a5 12.ba5 bc5 13.dc5 Qa5 14.Nb3+=) 12.Nb3 (12.a4 a6+/–) 12...Qc7 13.a4 Ba6 14.ab5 (14.Na5 0–0+/–) 14...Bb5 15.Bb5 cb5 16.Ra5 a6 17.Rfa1 Qc8 18.Qd3 (18.Bc3 Qc6+/–) 18...0–0 19.Nbd2 Qc6 20.Qa3 Ne4 (20...Nb8!?+/–) 21.Ra6+– Ra6 22.Qa6 Rc8 23.Qc6 Rc6 24.Ra5 Kf8 25.Rb5 Ra6 26.Ra5 Nb8 27.Ra6 Na6 28.b5 Nb4 29.c6 Ke8 30.Ne4 de4 31.Ne5 Be5 32.de5 Nd5 33.Bd4 Kd8 34.b6 Kc8 35.Bc5 h5 36.b7 Kb8 37.Bd6 Nc7 1–0. Belliard,Luis – Potter,Adolf, Lugano ol (Men), 1968.

4.d4 Nf6 5.Nf3 e6 6.c4 Be7 7.Be2 0–0 8.0–0 Nbd7 9.Nc3 c5 10.bc5 Nc5?? (better 10...dc5 11.d5 ed5 12.cd5 Bd6=) 11.dc5+– dc5 12.Qd8 Rfd8 13.Rfd1 Rdc8 (13...Rd1 14.Rd1 a6 15.Na4+–) 14.Nb5 Bc6 15.Nc3 a6?? (15...Bb7 16.a3 Rd8+–) 16.Ne5+– Bb7 17.Bf3 (17.Rab1 Rab8+–) 17...Bf3 18.Nf3 b5 (18...Rd8+–) 19.cb5 ab5 20.Nb5 Nd5 21.Nc3 Nb4 22.a3 Nc2 23.Rac1 (better 23.Ra2!? Bf6+–) 23...Na3 24.Ba3 Ra3 25.Ne4 f5 26.Nd6 Rc7?? (better 26...Rd8 27.Nc4 Rd1 28.Rd1 Ra2+–) 27.Nb5 Raa7 28.Na7 Ra7 29.Ne5 g5 (29...Kf8 30.Nd7 Kf7 31.Nc5+–) 30.Nd7 (30.Nc6 Rc7 31.Ne7 Re7 32.Rc5 h6+–) 30...Kf7 (30...Rc7 31.Rc4+–) 31.Nc5 Bc5 32.Rc5 Kf6 33.Rc6 h5 34.h3 g4 35.hg4 hg4 36.Rdd6 Re7 37.Kh2 Ke5 38.f4 Kf6 (38...gf3 39.gf3 f4 40.ef4 Kf4 41.Re6 Re6 42.Re6+–) 39.g3 (39.Kg3!? Re8+–) 39...Kf7 40.Rd1 (40.Kg2 Re8+–) 40...Kf6 (40...Ra7 41.Kg1+–) 41.Rcd6 Rh7 42.Kg2 Rc7 43.Rd7 Rc3 44.Kf2 Rc2 45.R1d2 Rc6 46.R7d6 Rc7 47.e4! fe4 48.Ke3 (48.R6d4 Rh7+–) 48...Kf5 49.Ra2 Rc3 50.Kd2 (better 50.Kf2+–) 50...Rg3 51.Ra5 Kf6?? (51...Kf4 52.Ra4 Rg2 53.Ke1 Kf3 54.Re6 Rg1 55.Kd2 Rg2 56.Kc3 Re2 57.Rf6 Kg2+–) 52.Re5 Rg2 (52...Kf7 53.Re4 Rf3 54.Ke2+–) 53.Ke3 Rg3 (53...Kf7 54.Rd7 Kf6 55.Rh5 Rg3 56.Ke4+–) 54.Ke4 Rg1 (54...Kf7+–) 55.Rde6 Kf7 56.Kf5 g3 (56...Re1 57.Re1 Kg7 58.Re7 Kf8 59.Kg6 g3 60.Re8) 57.Re7 Kf8 58.Kf6 Rh1 (58...Kg8 59.Re8 Kh7 60.Rh5) 59.Rg5 (59.Re8) 59...Rh6+– 60.Kf5 Ke7 61.Rg3 Rf6 62.Ke4 (62.Kg5 Rf7 63.Rh3 Kf8+–) 62...Ke6 63.Rg5 White plans f5 63...Kf7 64.f5 Ra6 65.Kf4 (better 65.Rg1!?+–) 65...Ra4= 66.Kg3 Ra3 67.Kh4 Ra4 68.Kh5 Kf6 69.Kh6 Rf4 Attacking the isolated pawn on f5 70.Rg6 Kf5 71.Kg7 Ke4 72.Re6 Kd5 73.Rf6 Rg4 74.Rg6 Rc4 75.Kh6 Rh4 76.Kg5 Rh1 77.Rf6 Rg1 78.Kh6 Rh1 79.Kg7 Rg1 80.Kf7 Ke5 81.Re6 Kd5 82.Re7 Kd6 83.Ke8 Rg8 84.Kf7 Rh8 85.Kg7 Rh1 86.Rf7 Rg1 87.Kf8 Ke6 88.Rg7 Rd1 89.Kg8 Kf6 90.Rf7 Kg6 91.Rg7 Kf6 92.Rf7 Ke6 93.Kf8 Rd8 94.Kg7 Rd5 95.Rf6 Ke7 96.Rf7 Ke6 97.Rf6 Ke7 98.Rf7 Kd8 99.Rf8 Kc7 100.Rf7 Kb6 101.Rf6 Ka5 0–1. bambambambambambam (1695) – chessurio (1685), lichess.org, 2017.

4.Be2?? Nc6?? 5.b5+= Ne5 6.Nf3 Nf3 7.Bf3 Bf3 8.Qf3 Nf6? (8...d5 9.e4+=) 9.0–0 (9.Bf6!? ef6 10.Qc6 Ke7+–) 9...e5 (9...Nd7 10.Qc6+–) 10.d3 (10.Qc6 Nd7+–) 10...Be7 (10...Rc8 11.c4+=) 11.Nd2 (11.Qc6 Nd7+–) 11...0–0+= 12.Rae1 (12.c4 Qd7+=) 12...Qd7 (12...a6 13.ba6 Ra6 14.a3=) 13.a4 h6 14.Qe2 c5 (14...a6 15.c4=) 15.f4 Nd5 (15...ef4 16.ef4 Rfe8 17.Ne4+=) 16.f5 (better 16.fe5!? de5 17.Be5+–) 16...Bf6 (16...Bg5 17.Nc4+=) 17.Ne4 Qe7 18.c4 Nb4 19.Qd2 Rad8 (19...d5 20.Nf6 Qf6 21.Bc3 dc4 22.Bb4 cb4 23.dc4= (worse 23.Qb4 cd3 24.Rd1 Rfd8–/+)) 20.d4 (better 20.Bc3+–) 20...ed4? (better 20...d5 21.Nf6 Qf6 22.de5 Qg5 23.cd5 Rd5+=) 21.ed4+– d5? (better 21...a5+–) 22.cd5 (better 22.Nf6 Qf6 23.dc5 dc4 24.Qb4 (24.Bf6?! Rd2 25.Bc3 Ra2 26.Bb4 Ra4+–) 24...bc5 25.Bf6 (25.Qc4?! Qb2 26.Qc5 Rd2+–) 25...cb4 26.Bd8 Rd8 27.Rf4+–) 22...Rd5= 23.Nf6 Qf6 24.Qc3 (24.Qe2 Qd6= (24...cd4? 25.Qc4+–)) 24...Rf5 (24...Qd4 25.Qd4 cd4 26.Ba3–/+) 25.Rf5 (25.dc5 Rf1 26.Rf1 Qc3 27.Bc3 bc5 28.Bb4 cb4+=) 25...Qf5=+ 26.dc5 bc5?? (better 26...Qc5 27.Qc5 bc5=+) 27.Qg7 1–0. Akrapovik – beto59, lichess.org, 2018.

4.Be2?? Bg2 5.Bf3 Bh1 6.Bh1 –+.

4.Ne2 e5 5.Ng3 Nd7 6.f3 g6 7.Be2 Bg7 8.0–0 Ne7 9.f4 0–0 10.f5 (10.fe5 de5 11.Nc3 c5+=) 10...Nf5= 11.Nf5 gf5 12.Rf5 Nf6 13.Rg5 (13.Nc3 Qd7 14.Rf2 a6=) 13...Ne4 (13...Nd5 14.Rg3 Nb4 15.d4–/+) 14.Rg4 (14.Rf5 a5 15.b5 Qd7=) 14...Qf6 (better 14...f5!? 15.Bc4 Kh8 16.Rg7 Kg7–/+) 15.Qe1 Bc8?? (better 15...Qe7=) 16.Re4+– Qg6 17.d3 Bb7 (17...c6 18.Rh4+–) 18.Rh4 (better 18.Rg4 Qh6 19.Rg3+–) 18…Qg2. Akrapovik – xavorra, lichess.org, 2019.

4.Nf3 e6 (--> 3.e3 e6 4.Nf3 d6).

4.b5 Nd7

5.c4 Ngf6 6.Nf3 Ne4 7.Nc3 (7.Be2 e5+=) 7...Nc3 8.Bc3 (worse 8.dc3 e5=+) 8...Nc5 (8...a6 9.d4=) 9.d4 (9.Be2 a6+=) 9...Ne4 10.Bb2 c5 (10...e6 11.Be2+=) 11.bc6 Bc6 12.d5 (12.Bd3 Bb7+=) 12...Bb7 (12...Bd7 13.Be2+=) 13.Nd4 Rc8? (13...Nc5 14.Be2+=) 14.Bd3 (better 14.Qa4 Qd7 15.Qa7+–) 14...e5? (better 14...Nc5!? 15.Bf5 Rb8+–) 15.Qa4 (better 15.Be4 ed4 16.Qa4 Qd7 17.Qd7 Kd7 18.Bf5 Ke7 19.Bc8 Bc8 20.Bd4 Kd7+–) 15...Ke7? (better 15...Qd7 16.Qd7 Kd7 17.Be4 Rc4+–) 16.Nf5 Kf6 17.Be4 g6 (17...Qc7 18.Rc1 (18.Qa7?! Ra8 19.Qa8 Ba8+=) 18...Bd5 19.cd5 Qc1 20.Bc1 Rc1 21.Ke2 Rh1 22.Qd7 Kg5 23.Ng7 Be7 24.Qe7 f6 25.Ne6 Kh5 26.Qf7 Kh4 27.Qf6 Kg4 28.Qg5) 18.Nd4! Be7 (18...ed4 19.Bd4 Double attack) 19.Nc6 (19.Qa7!? Qd7 20.Qb6 Rc4+–) 19...Bc6 20.dc6 Qc7 21.f4 (21.Rd1 Rhd8+–) 21...Rhf8 (21...Kg7 22.Rd1 Rhd8 23.Qb5 Bh4 24.g3+–) 22.0–0 (22.Rd1 Rcd8 23.Qa6 Ke6 24.Bd5 Kf5+–) 22...Kg7 23.Rad1 f6 (23...Rcd8 24.Qa6 f5 25.Bd5+–) 24.Qb5 (24.fe5 Rce8 25.e6 Rb8+–) 24...ef4 (24...Rce8 25.f5+–) 25.Rf4 Rfe8 (25...Rf7+–) 26.Qg5 Bd8 (26...Rf8 27.Rh4 Rh8+–) 27.Bf6 Bf6 (27...Kg8 28.Bg6! h6 29.Bf7 Kf7 30.Bd8 Ke6 31.Qd5) 28.Qf6 Kh6 (28...Kg8 29.Bd5 Re6 30.Be6 Qf7 31.Qf7 Kh8 32.Qf6) 29.Rh4 1–0. GuestRVGX – GuestBJFD, freechess.org, 2018.

5.d4 c6 6.a4 cb5 (6...e5 7.c4=) 7.ab5+= Qc7 8.Nd2 Ngf6 9.Ngf3 Bf3 (9...e5 10.c4+=) 10.Qf3+– 0–0–0?? (better 10...d5!? 11.c4 e6+=) 11.Bd3 (better 11.Qa8 Qb8 12.Qc6 Qc7 13.Ra7 Qc6 14.bc6+–) 11...d5 (11...Kb8 12.0–0+–) 12.0–0 e6 13.Ra6 (13.Ra4 Bd6 14.Rfa1 Kb8 15.Ra7 Qa7 16.Ra7 Ka7+–) 13...Kb8 (13...Bb4!? 14.Nb3 Nb8+–) 14.Rfa1+– g6 15.c4 Bb4 16.Ra7 Qa7 17.Ra7 Ka7 18.Qd1 (18.Nb3 dc4 19.Bc4 Rc8+–) 18...Kb7 (better 18...Bd2!? 19.Qd2 dc4 20.Bc4 Rc8+–) 19.Nf3 dc4 20.Bc4 Nd5? (better 20...Rc8 21.Qb3 Bd6+–) 21.Qb3 (21.Bd5!? ed5 22.Qb3 Be7 23.Qd5 Kb8 24.Qf7 Rhe8+–) 21...N7f6 22.e4! Ne4 23.Bd5 Rd5 24.Qb4 Nd6 25.Ne5 f6 (25...Rc8+–) 26.Nf7! Nf7 27.Qe7 Ka8? (27...Kb8 28.Qf7 Rb5 29.Qf6 Rc8 30.Qf4 e5+–) 28.Qe6 (worse 28.Qf7 Rb5 29.Qf6 Rb8+–) 28...Rhd8 29.Qf7 Rb5 30.Qa2 (30.Qf6 Rc8 31.Qf3 Ka7+–) 30...Ra5 (30...Kb7 31.Kf1 Rbd5 32.Qa3+–) 31.Qb3 (31.Qe6 Kb7+–) 31...Kb7 32.g3 (32.Qf7 Ka6+–) 32...Rdd5 33.Bc3 (33.Qe3 Rd6+–) 33...Rab5 34.Qc2 f5 (34...Rd7 35.g4+–) 35.Qe2 Ka6 36.Qa2 (better 36.Qe8 Kb7+–) 36...Kb7 37.Qe2 Kc6?? (37...Ka6 38.Qe8 Kb7+–) 38.Qe8 Rd7 (38...Kc7 39.Qg8 g5+–) 39.Qe6 Rd6 40.Kg2 (better 40.Qc4 Rc5 41.dc5 bc5 42.Be5+–) 40...Rbd5 (better 40...Re6 41.h3 Re2 42.d5 Rd5–+) 41.Qe8+– Rd7 42.Bb2 b5? (42...Kc7+–) 43.Qc8 Rc7 (43...Kb6 44.Ba3 Ka5 45.Bc5+–) 44.Qa8 (better 44.Qe6 Rd6 45.d5 Kc5 46.Qe5+–) 44...Rb7 45.Qc8 Rc7 46.Qe8 (better 46.Qe6 Rd6 47.d5 Kc5 48.Qe5+–) 46...Rcd7 47.Qe6 R7d6? (47...R5d6 48.Qe1+–) 48.Qc8 Kb6 49.Bc3 (better 49.Ba3 b4 50.Bb4+–) 49...Rc6 (49...Rd8 50.Qe6 R5d6+–) 50.Qb8 Ka6 51.Qa8 Kb6 52.Ba5 1–0. GuestJRTR – GuestTWKV, freechess.org, 2017.

5.d4 e5 6.Nf3 ed4 7.ed4 Ne7 (7...Ngf6 8.Nc3+=) 8.Bd3 c6 (8...g6 9.d5 f6 10.0–0+–) 9.a4 (9.Qe2 cb5 10.0–0+–) 9...Qc7 (better 9...Nd5!?+–) 10.0–0+– c5 11.Re1 Nf6 (11...c4 12.Bf1+–) 12.Bf5 (better 12.Nbd2+–) 12...g6?? (better 12...c4 13.d5 Kd8 14.Bf6 gf6+–) 13.dc5 Qc5 (13...gf5 14.Bf6 Rg8 15.c6+–) 14.Bf6 Qf5 15.Qd6 Rd8 (15...Qd7 16.Qd7 Kd7 17.Ne5 Kc7 18.Bh8 Nd5 19.Nf7 Kd7+–) 16.Re7 (16.Re7 Be7 17.Qe7) 1–0. GuestMZWZ – GuestGHHV, freechess.org, 2020.

5.Nf3 e5 6.Be2 Ngf6 7.0–0 Be7 8.d4 e4 9.Nfd2 d5 10.c4 0–0 11.c5 (better 11.Nc3+=) 11...Bc6?? (better 11...bc5 12.dc5 Nc5–/+) 12.Nc3 (better 12.bc6 Nb8+–) 12...Qb8?? (better 12...Bb5 13.Bb5 bc5+–) 13.Nd5 (better 13.bc6 bc5 14.Ba3+– (14.cd7?! Qb2 15.Na4 Qa3+–)) 13...Bb7?? (better 13...Bd5 14.c6 a6=+) 14.cb6 (14.Ne7 Kh8 15.c6 Re8+–) 14...Bc8?? (14...Bd5!? 15.ba7 Ra7 16.a4–+) 15.Nb1 (15.bc7!? Qb7 16.Ne7 Kh8+–) 15...Qb7?? (15...Nd5 16.ba7 Ra7 17.Nc3–/+) 16.Qb3 (better 16.Ne7 Kh8 17.ba7+–) 16...Nd5–/+ (16...Qd5?! 17.bc7 Nb6 18.Rc1=) 17.Bc1? (17.ba7 Ra7 18.Nd2 N7f6–/+) 17...Bd8 (better 17...N7b6 18.Ba3 Ba3 19.Na3 c6–+) 18.Bc4? (better 18.Ba3 Re8 19.ba7 Ra7 20.Rc1–/+) 18…Re8?? (better 18...N7b6 19.Be2 Be6–+). onur604 (2320) – hroshani_37 (2210), lichess.org, 2020.

5.Nf3 e6 6.c4 Ne7 7.a4 g6?? (7...a6 8.d4=) 8.Be2 (better 8.Bh8 a6 9.Nc3+–) 8...Rg8 9.0–0 h6 (9...a6 10.d4+=) 10.d4 (10.Re1 a6+=) 10...g5 (10...c5 11.Bc3+=) 11.Nc3 Ng6 (11...a6 12.Bd3+=) 12.Nd2 (12.a5 ba5 13.Ra5 c5+–) 12...e5 (12...c5 13.d5+–) 13.Bf3 White is in command 13...Bf3 14.Nf3 (14.Qf3 Bg7+–) 14...f5 (14...a6 15.Nd5+–) 15.de5 Nde5 (15...de5 16.e4 f4 17.Nd5+–) 16.Nd4+– Nc4 (better 16...Qd7!? 17.Nf5 Qf5+–) 17.Qb3 Nge5 18.Rad1 (18.f4 gf4 19.ef4 Qh4+–) 18...Qf6 (18...Nb2 19.Qg8 (19.Qb2?! Qd7+–) 19...Qf6 20.Rb1+–) 19.Nd5+– Qf7 20.Nc6 Nb2?? (20...Rc8 21.Ne5 Ne5 22.Nf6 Qf6 23.Qg8+–) 21.Qb2 (21.Nc7 Qc7 22.Qe6 Be7 23.Qg8 Bf8 24.Qe6 Qe7 25.Ne7 (worse 25.Qe7 Be7 26.Rd4 a6–/+) 25...Be7 26.Rd6+–) 21...Nc6+– 22.Nf6 (22.bc6?! Kd8=) 22...Kd8 23.Ng8 (23.bc6?? Bg7–+) 23...Ne5? (better 23...Na5 24.Qf6 Ke8+–) 24.Qe5+– Qg8 25.Qf5 Be7 (25...a6 26.Qf3 Ra7 27.Qf6 Be7 28.Qh6+–) 26.Rc1 a6 (26...Rc8 27.Rc6+–) 27.Qe4 Ra7 (27...Rc8 28.ba6 d5 29.Rfd1+–) 28.Rc2 (28.a5 d5 29.Rfd1 Ke8 30.Rd5 Qg7+–) 28...ab5 29.ab5 Qe8 30.Rfc1 (30.Qd5 Qg6 31.Ra2 Ra2 32.Qa2 Qe4+–) 30...Qb5 31.h3 (31.Qh7!? Qe8+–) 31...Qd7 32.Qd4 (32.Qg6 Bf8+–) 32...c5 (32...Qf5!?+–) 33.Qh8 Kc7 (33...Qe8 34.Qh6 Ra4 35.Rd2+–) 34.Qh6 b5 (34...g4 35.hg4 Qg4 36.Qh7+–) 35.Qg6 b4 (35...Kd8 36.Rb2+–) 36.Qe4 (36.Rb2 Qb5+–) 36...Rb7 (36...Kd8 37.Qd5+–) 37.Rd1 (37.Ra2 g4 38.Qf4 Qe6 39.Rc5 Kd7+–) 37...b3 (37...Kd8+–) 38.Rc5!! dc5 A pinning theme (38...Kd8 39.Ra5 Qc8+–) 39.Rd7 A double attack 39...Kd7 40.Qb7 Kd6 (40...Ke8 41.Qb3 Kf8 42.e4+–) 41.Qb3 (41.Qb3 Kd7 42.e4+–) 1–0. BeepBeepImAJeep (2605) – themurdercastle (2395), lichess.org, 2015.

4.b5 e5

5.c4 Nd7 6.d4 ed4 7.ed4 Ngf6 8.d5 Qe7 9.Qe2 Qe2 (9...a6 10.Nc3=) 10.Be2+= 0–0–0 (10...Be7 11.Nf3+=) 11.Nf3 Kb8 (11...Re8 12.Nc3+=) 12.0–0 (12.Ng5!? Re8 13.Nf7 Rg8+/–) 12...Nc5 13.a4 Rg8 (13...Re8 14.Re1+/–) 14.a5 (14.Re1 Re8+/–) 14...h6 (14...Nb3 15.Ra4 Re8 16.Re1+/–) 15.ab6 ab6 16.Nc3 g5 17.Na4 (17.Nd4 Re8+/–) 17...Na4 (17...Bg7 18.Rfe1+/–) 18.Ra4 Bg7 19.Rfa1 (19.Nd4 Nd7 20.Rfa1 Bd4 21.Bd4 Rde8+/–) 19...Ne4 (19...Nd5!? 20.Bg7 Nf4 21.Bh6 Ne2 22.Kf1 Nc3 23.Bg5 Na4 24.Bd8 Nb2=) 20.Bg7+/– Rg7 21.Nd4 Nc3 22.Ra7 f5?? (better is 22...Ne2 23.Ne2 Re8+/–) 23.Kf1 (23.Nc6 Bc6 24.bc6 Ne2 25.Kf1 Ng3 26.hg3 Re8 27.Ra8#) 23...f4 24.Nc6 Kc8 25.Nd8 Kd8+– 26.Rb7 Kc8 27.Raa7 Re7 28.Bg4 Kd8 29.Rb8# 1–0. popovicigelu – bobi53, kurnik, 2011.

5.c4 Nf6 6.Nf3 Nbd7 7.Be2 Be7 8.0–0 0–0 9.d4 ed4 10.ed4 a6 11.a4 ab5 12.ab5 Ra1 13.Ba1 c6 14.Nc3 White prepares d5 14...cb5 15.Nb5 Ne4 16.Bd3 Qa8 17.Re1 Ndf6?? (better is 17...d5 18.Nc7 Qa2 19.Nd5 Bd5 20.Be4 Be4 21.Re4 Bf6+/–) 18.d5+– Qd8 19.Be4 Ne4 20.Re4 Qd7 21.h3 f5 22.Re6 Bc8 23.Qd4 Rf7 24.Qb6 Bf8 25.Nfd4 f4 26.Nc6 Qb7 27.Qb7 Bb7 28.Nd8 Rd7 29.Re8 Ba6 30.Ne6 Rf7 31.Nf8 Rf8 32.Rf8 Kf8 33.Bd4 Ke7 34.Nc7 Bb7 35.Bg7 h5 0–1. typ48 – juryjacek, kurnik, 2012.

5.c4 g6 6.Nc3 Bg7 7.a4 Ne7 8.Nge2 Nd7 9.Ng3 Nc5 10.d4 ed4 11.ed4 Ne6 12.d5 Nc5 13.Be2 0–0 14.0–0 a6 15.h4 Qd7 16.Bg4 Qd8 17.h5 Nb3 18.Qb3 ab5 19.Nb5 c6 20.dc6 Bc6 21.Bg7 Kg7 22.Qc3 Kg8 23.h6 f6 24.Be6 Kh8 25.Rfd1 1–0. jura1946 – venahis, kurnik, 2012.

5.Bc4 Nf6 6.Nf3 Be7 7.0–0 0–0 8.h3 h6 9.a4 Nbd7 10.Nc3 Kh8 11.d4 e4 12.Nd2 d5 13.Be2 Nh7 14.f3 Ndf6 15.fe4 Ne4 16.Nce4 de4 17.c4 f5 18.d5 Bd6 19.Bh5 Qg5 20.Qe2 Nf6 21.Bf6 Rf6 22.Rae1 Raf8 23.Nb3 Bc8 24.Nd4 f4 25.ef4 Rf4 26.Rf4 Rf4 27.Ne6 Be6 28.de6 Qe5 29.Bf7 Bc5 30.Kh1 e3 31.Rd1 Bd4 32.a5 Rf2 33.Qg4 e2 34.Qd4 Rf1 35.Rf1 ef1Q 36.Qg1 Qg1 37.Kg1 g5 0–1. jura1946 – profesonalass, kurnik, 2012.

5.d4 f6 6.Nf3 Be7 7.c4 Nh6 8.Be2 0–0 9.0–0 Nf7 10.d5 Nd7 11.a4 Nc5 12.Ba3 a6 13.Bc5 bc5 14.Nc3 f5 15.e4 f4 16.Nd2 g5 17.f3 Kg7 18.h3 Kg6 19.Nb3 h5 20.Kh2 Rh8 21.g3 g4 22.fg4 hg4 23.Bg4 Bc8 24.gf4 ef4 25.Rf4 Ne5 26.Bc8 Qc8 27.Rf5 Bf6 28.Qg1 Kf7 29.Raf1 Rh6 30.Qg5 Qh8 31.Ne2 Rh3 32.Kg2 Rh2 33.Kg3 Qh3 34.Kf4 Qf1 0–1. popovicigelu – gesi1983, kurnik, 2012.

5.Nf3 (--> 1.b4 e5 2.Bb2 d6 3.b5 b6 4.e3 Bb7 5.Nf3).

4.c4 Nd7

5.b5 c5 6.a4 e5 7.Nf3 f6 (7...e4 8.Ng1=) 8.d4 Ne7 (8...ed4 9.ed4 Qe7 10.Be2 Bf3 11.gf3+=) 9.Nc3 (9.d5 g6+=) 9...ed4 10.ed4 cd4 11.Nd4 Nc5 12.Be2 (better 12.f3+=) 12...g6 (better 12...Bg2 13.Rg1 Bb7=) 13.Bf3 Bg7? (better 13...Bf3 14.Qf3 Bg7+–) 14.Bb7+– Nb7 15.Qf3 (better 15.Ne6!? Qd7 16.Ng7 Kf8 17.Ne4+–) 15...Nc5+– 16.0–0 0–0 17.Nd5 (17.Rfe1 Qd7+–) 17...Nd5 (17...Qd7 18.Nc6 Nd5 19.Qd5 Qf7 20.Rfd1+–) 18.Qd5 Kh8 19.Nc6 White intends a5 19...Qc7 20.Rfe1 (20.a5 ba5 21.Ra5 a6+–) 20...Rae8 21.a5 ba5 22.Na5?? (22.Reb1 a6+–) 22...f5?? (better 22...Re1 23.Re1 Qa5–+) 23.Bg7+– Kg7 24.Nc6 Qd7? (24...Nb3 25.Rad1+–) 25.Re8 (25.Red1 Qe6+–) 25...Re8 26.h3 (26.Na7 Nb3 27.Rb1 Qa7 28.Qd6 Qa2 29.Qd7 Kh6–/+) 26...Re2?? (better 26...Ra8+–) 27.Ra7 Nb7 28.Nd4 (better 28.Ne5! Re1 29.Kh2 Re5 30.Rb7 Qb7 31.Qb7 Kh6+–) 28...Re1 29.Kh2 Qe8 (29...Re7 30.Nc6 Rf7 31.Qd4 Kh6+–) 30.Rb7 (30.Qb7 Qe7 31.Qe7 Re7 32.Re7 Kf6 33.Re6 Kf7 34.b6 Kf8 35.b7 f4 36.b8Q Kg7 37.Qb7 Kh6 38.Nf5 Kg5 39.Qe7 Kf5 40.Qf6) 30...Kh6 31.Ne6 (31.Nf5 gf5 32.Qd6 Qe6 33.Qf4 Kg6 34.Qg3 Kh6 35.h4 Qf6 36.Qf4 Kg6 37.h5 Kh5 38.Rh7 Kg6 39.Qh6) 31...Re6 32.Qd2 g5 33.Qd3 (better 33.f4 Kg6+–) 33...Re4? (33...Qg6+–) 34.f3 (better 34.Qd6 Re6 35.Qc7+–) 34...Qe5= 35.Kg1?? (better 35.f4 Qf4 36.Qg3 Qg3 37.Kg3 Rc4 38.Rd7=) 35…Re1–+ (35...Re1 36.Kf2 Rc1 37.Rh7 Kh7–+) 0–1. RichardSommer (2030) – ArchangelOne (1970), lichess.org, 2020.

5.b5 Ngf6 6.a4 (6.Nf3 a6=) 6...a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 g6 (9...e6 10.Be2=) 10.Be2 Bg7 11.0–0 0–0 12.h3 Ne5? (better 12...e5=) 13.Nd4?? (better 13.Ne5!? de5 14.Be5+–) 13...Ned7 (13...Qa8 14.f4 Qa1 15.fe5 de5 16.Qb3–/+) 14.f4 (14.Nc3 Qa8 15.Bf3 Re8+=) 14...e5 (14...Qa8!? 15.Nc3 Bg2=+) 15.fe5= Ne5 (15...de5 16.Nf3 Re8 17.Nc3=) 16.Bf3 (16.Nc3!?=) 16...Bf3=+ 17.Nf3 Nc4 18.Qc2 Na5 (18...d5!?=+) 19.Rc1 Nd5 20.Bg7 Kg7 21.Nd4 (better 21.Nc3 Nf6 22.Ne2=) 21...Nb7?? (21...Qe7 22.Nc3 Ne3 23.Qd3=+) 22.Nc6?? (better 22.Qc6+–) 22...Qf6 (22...Qg5 23.Qc4 Nf6 24.Rf1=+) 23.Nd4 (23.Qc4!? Qb2 24.Rf1=) 23...Nc5=+ 24.Nc3 Nc3 25.Qc3 Ne6 (better 25...Kg8=+) 26.Ne6+– fe6 27.Qc7 Rf7 28.Qd6 Qf2 (better 28...Qb2!? 29.Rc6 Qb5 30.Rb6 Qf5+–) 29.Kh2+– Rf6 (29...Qe2 30.Qe5 Kh6 31.Qe6+–) 30.Rc7 Kh6 31.Qg3 (better 31.Rb7+–) 31...Qg3 32.Kg3 e5? (better 32...Rf5!?+–) 33.Rc6 Rf7 (33...Kg7 34.Rf6 Kf6 35.Kf3+–) 34.Rb6 Rc7 (34...Rd7 35.Re6+–) 35.Rc6 Rb7 36.b6 Kg7 (36...Kg5 37.Kf3 Rd7+–) 37.Rc7 Rc7 38.bc7 Kh6 39.c8Q g5 40.Qg4 (40.Qg8 e4 41.h4 gh4 42.Kg4 h3 43.Qg5) 40...e4 41.h4 Kg7 42.Qg5 Kf7 43.h5 Ke6 44.h6 Kd6 45.Qg7 Ke6 46.Qh7 Ke5 (46...Kd6 47.Qg6 Kd7 48.h7 Ke7 49.h8Q Kd7 50.Qhe8 Kc7 51.Qgc6) 47.Qe4 (47.Qc7 Kf6 48.h7 Kf5 49.Qc6 Kg5 50.h8Q Kf5 51.Qhf6) 47...Ke4+– 48.h7 Kd3 49.h8Q Kd2 50.Qe5 Ke2 51.Qd4 Kf1 (51...Ke1 52.Kf3 Kf1 53.Qd1) 52.e4 (52.Qd1) 52...Ke1 (52...Ke2 53.e5 Ke1 54.e6 Ke2 55.e7 Ke1 56.e8Q Kf1 57.Qf2) 53.e5 (53.Kf3 Kf1 54.Qf2) 53...Kf1 (53...Ke2 54.e6 Ke1 55.e7 Ke2 56.e8Q Kf1 57.Qf2) 54.e6 (54.Qf2) 54...Ke1 (54...Ke2 55.e7 Ke1 56.e8Q Kf1 57.Qf2) 55.e7 Kf1 (55...Ke2 56.e8Q Kf1 57.Qf2) 56.e8Q (56.Qf2) ½–½. RichardSommer (1990) – papinana (2060), lichess.org, 2020.

5.d4 e6 6.a3 Ngf6 7.Nf3 c5 8.b5 d5 9.Nbd2 Bd6 10.Ne5 (10.cd5 Bd5 11.Qe2 cd4=) 10...dc4 (better 10...cd4!? 11.ed4 a6=) 11.Ndc4+= Bc7 12.dc5 (12.Nc6 Bc6 13.bc6 Nb8+=) 12...Nc5 13.Bd4 Ncd7 (13...Qe7!?=) 14.Nc6+= Qc8 (14...Bc6 15.bc6 Nc5 16.Bc5 Qd1 17.Rd1 bc5 18.Rb1+=) 15.Be2 (15.Rc1 a6+–) 15...Nb8 (15...a6 16.a4=) 16.Bf3 Nc6 (16...Bc6 17.bc6 Qa6 18.Nd6 Bd6 19.Bf6 Qa5 20.Kf1 Qb5 21.Be2 Qc6 22.Bg7 Rg8+–) 17.bc6+– (17.Bc6?! Bc6 18.bc6 Qd8+=) 17...Ba6 18.Qb3 (18.Bf6!? Bc4 19.Bg7+–) 18...0–0 19.Rc1 Nd5 20.e4 (20.0–0 Qb8 21.h3 Qd8+=) 20...Ne7 21.e5 Rd8 22.Qb2 Bc4 23.Rc4 b5 (23...Qa6 24.Rc1=) 24.Rc1 (24.Rc2 Ba5 25.Ke2 Qc7+=) 24...Ba5= 25.Kf1 Qc7 (25...Nf5 A) 26.Qb5 Nd4 27.Qa5 Nb3–/+ (27...Nf3?! 28.gf3 Rd5 29.Qc3=); B) 26.Bc5=) 26.g3 (26.Bc5 A) 26...Nc6? 27.Bd6 (27.Qb5? Nd4 28.Qc4 Nf3 29.gf3 Rac8–+) 27...Rd6 28.ed6 Qd6 29.Rc6 Qd3 30.Be2+–; B) 26...Nc8+=) 26...Rac8 27.Kg2 a6 (27...Bb6 28.Bb6 Qb6 29.Qc2=) 28.Rhd1 Nd5 29.Rc2 (29.Bc5!?+=) 29...Bb6= 30.Bb6 (30.Bd5 Bd4 (worse 30...Rd5 31.Bb6 Qb6 32.Rd5 ed5 33.Qb4+=) 31.Rd4 ed5=) 30...Nb6=+ 31.Re1 Nc4 (31...Rd3 32.Be4 Nc4 33.Rc4 bc4 34.Bd3 cd3 35.Rc1=) 32.Qc3= Qe7 Attacking the isolated pawn on a3 33.Qb4 Qg5 34.h4 Qf5 35.Be4 Qg4 36.f3 Qh5 37.f4 (37.a4 f5 38.ef6 gf6+=) 37...f6 (37...Rd4 38.Qe7 Rdd8 39.a4+–) 38.ef6+= gf6 39.Qe7 (39.a4!?+=) 39...Qf7= 40.Qc5 Rd2 (40...f5 41.Bf3=) 41.Rd2+= Nd2 42.Qd6 (42.Bd3 Qe8 43.c7 Qf7+–) 42...Nc4+= 43.Qc5 (43.Qd7 Rc7 44.Qd8 Kg7+–) 43...f5 (43...Nd2!?=) 44.Bd3+– Nb2 45.Be2 (45.Bb5!? ab5 46.Qb5+–) 45...Qc7= 46.Rc1 (better 46.Qd4 Qc6 47.Bf3=) 46...Rd8? (46...Nc4 47.Bc4 Qc6 48.Qc6 Rc6 49.Be6 Re6 50.Kf3=) 47.Qc2 (better 47.Qe5 Qe5 48.fe5+–) 47...Na4 48.Rd1 Nb6 49.Rd8 Qd8 50.Qc5 Qd5 51.Qd5 Nd5 52.Bf3 Nc7 53.g4 fg4 54.Bg4 Kf7 55.Kf3 Ke7 56.Ke4 (56.f5 a5 57.Ke4 b4 58.ab4 ab4+=) 56...a5 (better 56...Kd6!?=+) 57.Ke5+– Exerts pressure on the isolated pawn 57...b4 58.ab4 ab4 59.Bd1 Na6 60.Bc2 h6 61.f5 (better 61.Ba4!?+–) 61...ef5= 62.Kf5 Nc5 (62...Kd6 63.Kg6=) 63.Kg6 (63.Ke5+=) 63...b3 (63...Kd6 64.Kh6 Ne6 65.Ba4+=) 64.Bb1 (better 64.Bb3!? Nb3 65.Kh6+–) 64...h5 (64...Kd6 65.Kh6 Kc6 66.Kg5=) 65.Kh5 Ne6 66.Kg6 Kd6 67.Kf5 Ke7 (better 67...Nd4 68.Kf4 Nc6=) 68.Ke5 Ng7 69.Kd4 (69.Be4 b2+–) 69...Kd6+– 70.Be4 b2 71.Kc3 b1Q 72.Bb1 Kc6 73.Kd4 (73.Kc4 Kd6+=) 73...Kd6 (73...Nf5 74.Ke5 Nh4 75.Be4 Kc5 76.Bb7=) 74.Ke4+= Ke6 75.Kf4 Kf6 76.Kg4 Kf7 (76...Nf5 77.h5=) 77.Ba2 (better 77.Kg5!?+–) 77...Kg6 78.Bg8 Ne8 (78...Nf5 79.h5 Kh6 80.Bf7=) 79.h5 (79.Bc4 Nd6=) ½–½. petrobbo (2020) – UConnKid (2065), ChessWorld.net, 2010.

5.Nf3 Ngf6 6.d3 g6 (6...c5 7.b5=) 7.Be2 Bg7 8.Qc2 (8.0–0 0–0=) 8...0–0 (8...c5 9.a3=) 9.Nbd2 (9.0–0 e5=) 9...c5 (9...h6 10.0–0=) 10.a3 Rc8 (10...Re8 11.0–0=) 11.0–0 (11.b5 Ra8=) 11...a6 12.Rfd1 (12.Rfe1 d5=) 12...b5 (12...Qc7 13.Rab1=) 13.bc5 Nc5 (13...Rc5 14.d4 Rc7=) 14.Qc3 (14.Bf6!? Bf6 15.d4+=) 14...Na4=+ 15.Qb4? (15.Qb3=+) 15...Re8?? (better 15...Nd5!? 16.cd5 Bb2–+ (worse 16...Nb2 17.Rdc1=+)) 16.d4 (16.Bf6 Bf6 17.d4 e5 18.de5 Be5 19.Ne5 Re5+=) 16...Ne4 (16...a5!? 17.Qb3 Nb2 18.Qb2 Bf3 19.gf3 e5 20.Qb5 ed4=+) 17.Ne4= Be4 18.Ng5 (18.Nd2 Bf5=) 18...Bc6 (better 18...Nb2!? 19.Qb2 Bf5=) 19.cb5+– Nb2 (19...ab5 20.Bb5 Bb5 21.Qb5+–) 20.Qb2. Goldmund,Heike – Foster,Duncan (1635), FICGS, 2017.

5.Nf3 Ngf6 6.Be2 e6 7.0–0 Be7 8.d3 0–0 9.Nbd2 a5 10.a3 ab4 11.ab4 Ra1 12.Qa1 Qa8 13.h3 Qa1 14.Ra1 Ra8 15.Ra8 Ba8 16.d4 Ne4 17.Ne4 Be4 18.Nd2 Bc2 19.f4 Bf6 (19...d5 20.b5=) 20.Kf2 c5 21.bc5 dc5 22.Nf3 Be4 23.Ne5 Be5 24.fe5 Kf8 25.h4 Ke7 26.g4 Kd8 27.Kg3 Kc7 28.Kf4 Bc2 29.g5 g6 30.Kg3 Nb8 31.Kf2 Be4 32.Ke1 Nc6 33.Kd2 Ne7 34.Bg4 (34.h5!?+/–) 34...Kc6 35.Ba3 Nc8 (35...Nf5!?=) 36.d5! Kd7 37.d6 Na7 38.Bb2 Bc6 39.Be2 Kc8 40.Bd1 Kb7 41.Ba3 Ka6 42.Bb2 Bd7?? 43.Be2 Nc6 44.Kc2 Ka5 0–1. Tagirov,Kajum K (1920) – Khaziev,Anvar (2060), Kopylov Memorial op, 2008.

4.c4 Nf6

5.d4 e5 6.de5 de5 7.Qd8 Kd8 8.Be5 Bb4 9.Bc3 Bc3 10.Nc3 Nc6 11.Nf3 Kd7 12.Be2 Rae8 13.0–0 Kc8 14.Rfd1 Rd8 15.Nd5 (15.Rab1 Rhe8=) 15...Nd5+= 16.cd5 Ne7 17.e4 f5 18.Ne5 Rhf8 (better is 18...fe4!? 19.Nf7 Bd5 (19...Rd5? 20.Nh8 Rd1 21.Bd1+–) 20.Nh8 Rh8+=) 19.f3 fe4 20.fe4 Rde8 (20...Rf4 21.Bd3+=) 21.Bg4 (better is 21.d6 cd6 22.Rac1 Kb8 23.Nd7 Ka8 24.Nf8 Rf8 25.Rd6+–) 21...Kd8?? (better is 21...Nf5 22.Bf5 Rf5 23.ef5 Re5+/–) 22.Nc6+– Nc6 23.dc6 Ke7 24.Rd7 Kf6 25.cb7 Rb8 26.Rc7 Ke5 27.Rc8 Ke4 28.Rf8 Rf8 29.Bc8 (29.Bc8 a5 30.b8Q Rc8 31.Re1 Kd5 32.Rd1 Ke4 33.Qb7 Kf4 34.Qf7 Kg4 35.h3 Kh4 36.Rd4 Kg5 37.Rd5 Kh4 38.Qf4#) 1–0. bluepiramid2 (1710) – misio1983 (1745), kurnik, 2011.

5.d4 g6 6.d5 (6.Nf3 Bg7=) 6...Bg7 7.Nf3 0–0 8.Bd3 Nbd7 (8...c6 9.e4=) 9.0–0+= Re8 (9...c5 10.b5=) 10.Qc2 (10.e4 e6+=) 10...e5 (10...c6 11.e4=) 11.Nc3 (11.e4 a5 12.b5 Nc5+=) 11...Rf8 (11...c5 12.dc6 Bc6 13.e4+=) 12.h3 (12.e4 Qe7+/–) 12...c5 (12...a6 13.e4+=) 13.a3 Bc8 (13...cb4 14.ab4 a5 15.ba5 ba5 16.Rfb1+=) 14.Nb5 (14.e4+=) 14...a6 (better is 14...Ne8!?+=) 15.Nd6+– Nb8? (better is 15...cb4 16.ab4 Qe7+–) 16.Be5 (16.Nc8 e4 17.Be4 Qc8+–) 16...Nfd7 (16...Nbd7 17.Bh2+–) 17.Bg7 Kg7 18.Nc8 Qc8 19.Qc3 f6 20.Ng5 Re8 21.Ne6 Re6 22.de6 Ne5 23.Be4 Ra7 24.Bd5 Re7 25.f4 Nec6 26.bc5 bc5 27.Rab1 Nd8 28.f5 g5 29.Qa5 Nbc6 30.Qc5 1–0. Wall,Bill – Sukist, internet, 2005.

5.Nf3 Nbd7 6.d4 e6 7.Nbd2 Be7 8.Be2 c6 9.0–0 0–0 10.a4 a6 11.b5 cb5 12.ab5 ab5 13.cb5 Ra1 14.Qa1 Qa8 15.Rc1 Rc8 16.Qa8 Ra8 (16...Ba8?? 17.Rc8 Bf8 18.Ra8+–) 17.Rc7 Bd8?? (better is 17...Bf3 18.Nf3 Ra2=) 18.Rb7+– Ra2 19.Bc3 Rc2 20.Bb4 d5 21.h3 h5 22.Ne5 Ne5 23.de5 Ne4 24.Ne4 de4 25.Rb8 Re2 26.Rd8 Kh7 27.Rd7 Rb2 28.Bf8 Kg6 29.f3 Rb5 30.fe4 Rb3 31.Rb7 b5 32.Kf2 Rb2 33.Kf3 Rb3 34.Bc5 Rb1 35.Bd4 Rb3 36.g4 hg4 37.Kg4 Rb1 38.h4 b4 39.h5 Kh6 40.Bc5 b3 41.Rf7?? Rg1–+ (41...Rg1 42.Kh4 b2–+) 0–1. typ48 – dzio29, kurnik, 2011.

5.Nf3 g6 6.b5 Bg7 7.Nc3 0–0 8.Be2 Ne4 9.0–0 Nc3 10.Bc3 Bc3 11.dc3 Nd7 12.Nd4 Nc5 13.Bf3 Bf3 14.Qf3 Na4 15.Nc6 Qd7 16.e4 Nc5 17.Rfd1 Qe6 18.a4 Qe4 19.Qe4 Ne4 20.Rd3 a6 21.Ne7 Kg7 22.Nd5 ab5 23.cb5 Rac8 24.Ne7 Rce8 25.Nd5 Rc8 26.Ne7 Rce8 27.Nc6 Nc5 28.a5 Nd3 29.ab6 cb6 30.g3 Re1 31.Kg2 Ra1 0–1. thecat74 – espoll, kurnik, 2012.

5.Nf3 g6 6.b5 Bg7 7.Nc3 c6 8.a4 cb5 9.ab5 0–0 10.Be2 a6 11.0–0 ab5 12.cb5 Nbd7 13.Nd4 Nc5 14.Bf3 Bf3 15.Nf3 Qd7 16.d4 Nce4 17.Qc2 Nc3 18.Bc3 Rac8 19.Qd3 Qg4 20.h3 Qd7 21.Ra6 Nd5 22.Rc1 Nc3 23.Rc3 Rc3 24.Qc3 Qb5 25.Ra1 e5 26.de5 de5 27.Qc1 e4 28.Rb1 Qc5 29.Nd2 Qc1 30.Rc1 Re8 31.Rc4 b5 32.Rb4 Re5 33.f4 ef3 34.Nf3 Re3 35.Rb5 Bf8 36.Rb7 Kg7 37.Ng5 Re7 38.Rb5 h6 39.Nf3 Re4 40.Nd2 Re1 41.Kh2 Re2 42.Nc4 Re4 43.Ne5 Bd6 44.Kh1 Re5 0–1. thecat74 – tatakarol, kurnik, 2012.

4.Nf3 a6

5.c4 e5 6.Be2 g6 (6...e4!? 7.Nd4 c5=) 7.0–0+= Bg7 8.d3 (8.d4 e4 9.Nfd2 Nf6+=) 8...Ne7 9.Qc2 0–0 10.Nbd2 (10.a3 c5=) 10...Nd7 (10...Re8 11.a3+=) 11.e4 (11.d4 c5 12.bc5 bc5=) 11...c5= 12.a3 Rc8 13.Rfd1 h6 14.Nb3 (14.Rac1 f5=) 14...g5 (14...f5 15.bc5 Nc5 16.Nc5 bc5 17.Rdb1=) 15.bc5 bc5 16.Na5?? (better 16.Rab1=) 16...Qa5–+ 17.Bc3 Qc7 18.Rdb1 Ng6 (18...Rb8 19.Rb2–+) 19.Qb3 (19.Ba5 Qc6–+) 19...Rb8 20.Qc2 Nf4 21.h3 (21.Rb2 f5 22.Re1 Qc6–+) 21...Nf6 (21...f5 22.Ne1–+) 22.Bd1 Bc6 23.Rb2 (23.Rb8 Rb8 24.Rb1 Rb1 25.Qb1 Nd7–+) 23...Rb2 24.Bb2 Rb8 (better 24...Nd7 25.Nd2–+) 25.g3 (25.Bc1 Nd7–+) 25...Ne6 (better 25...Nh3!? 26.Kg2 Qd7 27.Bc3–+) 26.Nh2 (26.Rb1 Bd7–+) 26...Qd7 (26...Qb7 27.Bc3–+) 27.Ng4 Ng4 28.Bg4 Ba4 29.Qe2 (29.Qd2 Qb7 30.Bc3 Nd4 31.Bd4 ed4–+) 29...Qe7 (29...Qb7 30.Bc3–+) 30.Bc1 (30.Bc3 Nd4 31.Bd4 cd4–+) 30...Nd4 31.Qe1 (31.Qf1–+) 31...Nc2 32.Qc3 Na1 33.Qa1 Qb7 34.Kg2 (34.Be3 Bc2 35.Be2 Qb3–+) 34...Bd7 (better 34...Qb3 35.Bd2–+) 35.Bd7 Qd7 36.f4 (36.Qa2 Qa4 37.Qd2 Rf8–+) 36...g4 (better 36...Qa4 37.Qc3 Qd1 38.Qd2 Qd2 39.Bd2–+) 37.h4 (37.Qa2 gh3 38.Kf3 ef4–+) 37...ef4 (37...Qa4 38.Qc3 Qd1 39.f5–+) 38.Bf4 (38.Qa2 f3 39.Kh2–+) 38...Ba1 (38...Ba1 39.Bc1 Qa4 40.Kg1 Bd4 41.Kh2 Qc2 42.Kh1 Qc1 43.Kg2 Rb2) 0–1. Goldmund,Heike – Foster,Duncan (1655), FICGS, 2016.

5.Be2 Nd7 6.0–0 e6 7.d3 Be7?? (better 7...Ngf6=) 8.Bg7+– f6 (8...Bf6 9.Bh8 Bh8+–) 9.Bh8 Bf8 (9...c5 10.Nd4! Nf8 11.Bh5 Kd7 12.bc5 bc5 13.Nb3+–) 10.Nd4 Qe7 (10...Ke7 11.Bf3 d5 12.c4+–) 11.Bh5 Kd8 12.Bf3 (better 12.Qg4 Nh6 13.Ne6 Kc8 14.Qh3+–) 12...h6 (12...d5 13.c4 Ne5+–) 13.Bb7 Rb8 14.Nc6 (14.Nc6 Ke8 15.Ne7 Ke7 16.Ba6+–) 1–0. Abdullaevich (1935) – shakiba (1775), lichess.org, 2019.

4.Nf3 Nd7

5.c4 c5 6.b5 e6 7.Be2 Qc7 8.0–0 f6 (8...Ngf6 9.d3=) 9.Nc3 g5 (9...Ne7 10.d4+=) 10.d3 (10.d4 g4 11.Nd2 cd4 12.ed4 f5+–) 10...h5 (10...Bg7 11.d4+–) 11.Ne4 (better 11.Ng5 fg5 12.Bh5 Kd8 13.Nd5 ed5 14.Bh8+–) 11...Bg7? (better 11...Rh7+=) 12.Nfg5!+– 0–0–0?? (12...fg5 13.Bh5 Double attack (13.Bg7 Pinning; 13.Bg7 Deflection; 13.Bh5 Decoy)) 13.Ne6 (13.Ne6 Qb8 14.Ng7+–) 1–0. GuestWTJX – DZALOE, freechess.org, 2019.

5.c4 e6 6.Be2 Ngf6 7.0–0 Be7 8.Nc3 0–0 9.Qc2 (9.d3 c5 10.a3 d5=) 9...Rc8 (9...a5 10.b5=) 10.a4 (10.d4 d5=) 10...c5 (10...d5 11.b5=) 11.b5 e5 (11...d5 12.cd5 ed5 13.Rac1=) 12.d3 h6 (12...Ra8 13.Rfb1=) 13.Qd2 (13.Ra3 Ra8+=) 13...Nh7 (13...Ra8 14.a5=) 14.e4 (14.a5 Nhf6+=) 14...Qe8 (14...f5!?+=) 15.a5+/– f5 (15...Ng5 16.Nd5+/–) 16.ab6 ab6 17.Ra7 Rb8 18.ef5 (18.Rfa1 Ng5+/–) 18...Rf5+= 19.Ne4 (19.Qe3 Qg6+=) 19...Rf8 20.Ne1 (20.Rfa1 Nhf6+=) 20...Ng5 21.Ng3 (21.Qe3 Qg6=) 21...Ne6 (21...Qf7 22.Bg4 Nf6 23.f3=) 22.Bh5 Qd8 23.Bf3 Bf3 24.Nf3 Nf4 25.Qe3 Qc8 26.Bc1 Ra8= 27.Ra8 Qa8 28.Re1 g5 29.Ne2 Nf6 30.h3 Qb7 31.Kh2 Qd7 32.Nfg1 Qf5 33.Nf4 gf4 34.Qf3 Qc8 35.g3 fg3+= 36.fg3 Kg7 37.Qe3 Ng8= 38.Nf3 Qb7+= 39.Kg2 Ra8 40.Qe4 Ra2 41.Kf1 Qe4 42.Re4 Nf6 43.Re2+= Re2 44.Ke2 e4 45.Nh4+/– Bf8 46.Bf4 ed3 47.Kd3 d5 48.cd5 Nd5+= 49.Be5 Kf7 50.Ke4 Ne7 51.Bd6 Ke6= 52.Be7 Be7 53.Nf5 Bg5 54.g4 Bd2 55.Kd3 Bg5 56.Ke4 Bc1 57.Ng3 Bd2 58.Kd3 Bf4 59.Ne2 Be5 60.Ng1 Kd5–/+ 61.Nf3 c4 62.Kc2 Bg7 63.Nh4 Kc5 64.Nf5= Bf8 65.Kc3 Kb5 66.Nd4 Ka6 67.Kc4+= Be7 68.Nb5 Ka5= 69.Na7 Bh4 70.Nb5 Bg3 71.Nc3 Ka6 72.Nb5 Kb7 73.Kd5 Ka6 74.Kc4 Be5 75.Na3 Kb7 76.Kd5 Bf4 77.Nb5+= Be3 78.Nd6 Kc7 79.Nb5 Kd7 80.Nc3 Bf2 81.Nb5 Ke7 82.Nc3 Be1 83.Nb5 Kf6 84.Nd4 Bf2 85.Nf3 Be3 86.Kc6 Ke6 87.Nh4+= Ke5 88.Nf5 Ke4 89.Ne3 Ke3= ½–½. Reimer,Karl – Grube,Herbert, Eisenberg RLP–ch MTB, 1998.

5.c4 e6 6.Be2 Ngf6 7.Qc2 g6 (7...Be7 8.0–0=) 8.d3 Bg7 9.Nbd2 Qe7 10.0–0 h5 (10...0–0 11.a3+=) 11.h3 0–0–0 (11...a5!?+=) 12.a4+– a6 (12...g5!? 13.Ng5 Nd5 14.cd5 Bb2 15.Ne6 fe6 16.Qb2 Rdg8+–) 13.a5+– Rdg8 (better 13...ba5 14.Ra5 Nf8+–) 14.c5 (better 14.b5!?+–) 14...dc5 (14...bc5 15.Rfc1+=) 15.ab6+– cb6 16.bc5 (better 16.d4 Kd8 17.dc5 bc5 18.Ba6+–) 16...Kb8? (better 16...Qc5 17.Qb1 Kd8=) 17.c6 Ba8?? (17...Rc8 18.Ne5 Ne5 19.Be5 Ka7+–) 18.cd7 Qd7 (18...Nd7 19.Bg7 Rg7+–) 19.Be5 Kb7 (19...Ka7 20.Qb2 Ne8+–) 20.d4 Rc8 21.Ba6 Ka7 22.Bb5 (22.Bc8 Qa4 23.Qa4) 22...Kb7 23.Qa4 (23.Ra7 Ka7 24.Qa4 Kb7 25.Qa6) 23...Qb5 24.Qb5 (24.Qa7 Kc6 25.Rfc1 Kd5 26.Qa2 Rc4 27.Rc4 Qb1 28.Rb1 Rc8 29.Rc8) 24...Nd5 25.Qa6 Kc6 26.Rfc1 (26.Rfc1 Kd7 27.Qa7 Bb7 28.Qb7 Rc7 29.Rc7 Nc7 30.Qc7 Ke8 31.Ra8) 1–0. GuestFNBV – Defendit, freechess.org, 2017.

5.d4 e6 6.Bd3 Ngf6 7.Nbd2 (7.0–0 e5 8.e4 Ne4=) 7...h6 (7...e5 8.e4=) 8.c4 Be7 9.a4 (9.0–0 0–0+=) 9...a5 10.b5 c5 11.bc6 Bc6 12.0–0 0–0 13.Re1 e5 (13...d5 14.Rc1+=) 14.d5 (14.Bf5 Qc7+–) 14...Bb7 (14...Nc5 15.Bf5 (15.dc6? Nd3 16.Re2 Nb2–+) 15...Bd7 16.Qc2=) 15.e4 Nc5 16.Bc2 Nh7 (16...Rc8 17.Rb1=) 17.Nb3+= Nb3 18.Bb3 Bc8 19.Ba3 Bg4 20.Qd3 f5 21.ef5 Bf5 (worse 21...Rf5 22.Bc2 Nf6 23.h3+–) 22.Qe3 Ng5 (22...Rc8 23.Ra2=) 23.Rac1 (23.Nd4!? Bd7 24.Nb5+=) 23...Nf3=+ 24.gf3? (better 24.Qf3 Bg5 25.Ra1=+) 24...Bg5–+ 25.Qe2 (25.Qc3 Bc1 26.Bc1–+) 25...Bf4 (25...Bc1?! 26.Bc1 Qf6 27.Kh1–+) 26.Qf1 Qh4 27.Qg2 Bh3 28.Qh1 (28.Qg3 Bg3 29.hg3–+) 28…Qg5 (28...Qg5 29.Qg2 Qg2) 0–1. Dino_Jarach (1935) – Materillo (1930), lichess.org, 2020.

5.Be2 a6 6.0–0 c6 7.d4 Qc7 8.c4 0–0–0 (better 8...Ngf6!?+=) 9.Nc3 f6 (9...e6 10.b5+–) 10.a4 g5 11.b5 a5? (11...Bg7+–) 12.bc6 Bc6 13.Nb5 (better 13.d5 Bb7 14.Ng5 Nh6+–) 13...Qb7 (13...Bb5 14.cb5 Kb8 15.d5+–) 14.d5 Bb5 15.cb5 (15.ab5 Nc5+–) 15...Kb8 16.Rc1 Nc5 17.Nd4 Rd7 (17...Rc8 18.Bg4 Re8 19.Rc4+–) 18.Ba3 (18.Bg4!? h5 19.Bd7 Qd7+–) 18...h5 19.Nc6 Ka8 20.Bf3 (20.Bh5!? Bg7 21.Bg4 Rh4+–) 20...g4 21.Be2 e5 22.Bc5 (better 22.de6!? Ne6 23.Qd5 Nc5+–) 22...dc5+– 23.Bc4 Bh6?? (23...e4 24.d6! Rd6 25.Bd5+–) 24.Rc3 (better 24.d6 Bf8 25.Qb3 Rd6 26.Bg8 Qd7+–) 24...Ne7?? (24...Rd6 25.Qe2+–) 25.e4 (better 25.Ne7 Qc7 26.Nf5 Bf8+–) 25...Nc6?? (better 25...Rd6+–) 26.bc6+– Qc6 27.Bb5 (better 27.dc6 Rd1 28.Rd1+–) 27...Qc7 28.Bd7 Qd7 29.Qb3 Rb8 30.Rb1 Bd2? (30...Rb7 31.Qb2 Ka7 32.Rb3+–) 31.Rc2 (better 31.Rc5! Bb4 32.Rc6+–) 31...Bb4 32.Rc4 f5 33.ef5 (33.Rb4?! cb4 34.Qc4 Ka7=) 33...Qf5 34.Qe3?? (better 34.Rd1+–) 34...Qb1–+ 35.Rc1 Qb2 36.g3 (36.Qh6 h4–+) 36...Qd4 (36...Bd2 37.Qe2 Qc1 38.Kg2–+) 37.Re1 (37.Qe2 Ka7 38.Rd1–+) 37...Qe3 (better 37...Be1 38.Qe1 Rd8 39.Qe2–+) 38.Re3 (38.fe3?? Be1 39.Kf1 b5 40.ab5 a4 41.Ke1 a3–+) 38...c4 39.f3 (39.Re5 c3 40.Re2–+) 39...c3 40.fg4 (40.Re1 c2 41.Rc1–+) 40...c2 41.Re1 Ba3 (41...Be1 42.h3 c1Q 43.Kh1 Bf2 44.Kg2 Rf8 45.h4 Qg1 46.Kh3 Qg3) 42.Rc1 (42.gh5 c1Q 43.Rc1 Bc1 44.h6–+) 42...Bc1 43.Kf2 (43.gh5 Rf8 44.h6 Bg5 45.Kg2 c1Q 46.Kh3 Qf1 47.Kg4 Qf5 48.Kh5 Bf6) 43...Be3! 44.Ke2 (44.Ke3 c1Q Double attack) 44...c1Q 45.Kd3 Qd2 46.Ke4 Qf2 (46...Qc2 47.Ke5 Qg6 48.d6 Re8 49.Kd5 Qe4) 47.Ke5 (47.d6 Qc2 48.Kd5 Re8 49.d7 Qd3 50.Kc6 Qc4 51.Kd6 Re6) 47...Qf6! 48.Ke4 (48.Kf6 Rf8 Double attack) 48...Rf8 (48...Qd4 49.Kf5 Qd5 50.Kf6 Rf8 51.Ke7 Bc5) 49.Kd3 (49.Ke3 Qf2 50.Ke4 Re8 51.Kd3 Re3 52.Kc4 Qe2 53.Kd4 Qd3) 49...Re8 (49...Qd4 50.Kc2 Rf2 51.Kb3 Qd3) 50.Kc4 (50.gh5 Qd4 51.Kc2 Qc4 52.Kb2 Bd4 53.Ka3 Re3) 50...Qe5 (50...Qf1 51.Kc3 Qb1 52.gh5 Rc8) 51.Kb5 (51.Kb3 Qd5 52.Kb2 Qd2 53.Kb3 Rc8 54.gh5 Rc3) 51…Qd4 (51...Qd4 52.Kc6 Qc5 53.Kd7 Re7 54.Kd8 Qc7; 51...Qd5 52.Ka6 Qd3) 0–1. anotherheaven (1705) – Laisha (1860), lichess.org, 2015.

5.Be2 c5 6.b5 Qc7 7.c4 e5 8.a4 Ngf6 9.d4 ed4 10.ed4 Be7 11.d5 a5 12.Bd3 0–0–0 13.0–0 Ne5 14.Ne5 de5 15.Re1 Bd6 16.h3 h5 17.Nd2 g5 (17...Rhe8!?+=) 18.Nf3+– g4 19.Ne5 gh3 20.Bf5 Kb8 21.Bh3 Rhg8? (21...Rhe8 22.Nc6 Bc6 23.bc6 Re1 24.Qe1 Re8 25.Bf6 Re1 26.Re1 Ka7+–) 22.Nc6 Bc6 23.Bf6 (23.bc6?! Ng4+–) 23...Bd7 24.Bd8 Qd8 25.Bd7 Qd7 26.Qh5 Qd8 (26...Rg4 27.Qh8 Ka7+–) 27.Re2 (better is 27.Qf7 Rf8 28.Qe6+–) 27...Rh8–/+ 28.Qg4?? (better is 28.Re5 Rh5 29.Rh5–+) 28...Rh4 (28...Rh1 29.Kh1 Qh8 30.Kg1 Qa1 31.Re1 Qe1) 29.Qf3?? (better is 29.Re8! Rg4 30.Rd8 Kc7 31.Ra8+–) 29...Qh8 (29...Rh1! 30.Kh1 Qh8 31.Kg1 Qa1 32.Re1 Qe1) 30.g3?? (better is 30.Re8 Qe8 31.Qf6–/+) 30...Qa1 (30...Qa1 31.Re1 Qe1 32.Kg2 Qh1) 0–1. mikebaldini (1650) – ahbian77 (1630), gameknot.com, 2015.

5.c4 e5

6.d4=.

6.Be2 g6 7.0–0 Bg7 8.d4 ed4 9.Nd4 Ngf6 10.Nc3 0–0 11.Qc2 h5 12.a4 c5 13.Ndb5 cb4 14.Na2 Be4 15.Bd3?? (15.Qd1 a5=) 15...d5?? (15...b3 16.Qc3 Bd3 17.Qd3 ba2 18.Qd1–+) 16.cd5?? (16.Nb4 Rc8 17.Be4 Rc4=) 16...Bd5?? (better is 16...b3 17.Qd1 Bd3 18.Qd3 ba2–+) 17.Nb4+= Nc5 18.Be2 Be4 19.Qd1 Qc8 20.Rc1 a5 21.Na2 Qe6 22.Nac3 Rad8 23.Qe1 Bd3 24.Rd1 Be2 25.Qe2 Nce4 26.Ne4 Ne4 27.Bg7 Kg7 28.Nc7 Qg4 29.Qg4 hg4 30.Rd4 Nc5 31.Rg4= Rd2 32.g3 f5 33.Rf4 Nd3 34.Rd4+/– Rc8 35.Ne6 Kf6 36.Nf4 Rcc2?? 37.Nd3+– 1–0. nizinna – letargi, kurnik, 2011.

6.Be2 g6 7.d4 Bg7 8.de5 de5 9.Nc3 Ne7 10.b5 0–0 11.0–0 Nf5 12.a4 Nc5 13.Qd8 Rad8 14.Rad1 e4 15.Nd4 Nd4 16.ed4 Nb3 17.d5 Nc5 18.Rc1 Bc3 19.Bc3 Na4 20.Bb4 a5 21.Bf8 Kf8 22.Rfe1 Nc5 23.Bf1 f5 24.g3 Re8 25.f3 Bc8 26.fe4 Ne4 27.Bg2 Re5 28.Be4 fe4 29.Kg2 h5 30.Rc2 Bf5 31.Rce2 Kf7 32.h3 Kf6 33.Kf2 Bh3 34.Re4 Rf5 35.Rf4 g5 36.Rf5 Bf5 37.Rc1 a4 38.c5 a3 39.cb6 cb6 40.Ke3 a2 41.Kd4 Bb1 42.Kc3 a1Q 43.Kd2 Qd4 44.Ke1 Qe3 45.Kd1 Bd3 46.Rc2 Qf3 47.Kd2 1–0. frholak – letargi, kurnik, 2012.

6.Be2 g6 7.h3 Bg7 8.d4 Nh6 9.Nbd2 0–0 10.Qc2 Qe7 11.0–0 ed4 Black gets in control 12.Nd4 c5 13.bc5 bc5 14.Nb5 a6 15.Nc3 Rab8 16.Rab1 Qg5 The mate threat is Qxg2 17.Nf3 Qf5 18.Bd3 Qe6 19.Ng5 Qe7 20.Nge4 Ne5 21.Nd5?? (better is 21.Nd2=) 21...Bd5–+ 22.cd5 Nd3?? 23.Qd3?? Rb2 24.Rb2 Bb2 25.Rb1 Be5 26.Qa6 Nf5 27.Rb7 Qh4 28.Nd2 Ne3 29.Nf3?? Qf4 30.fe3 Qe3 31.Kf1 Bg3 Threatening mate... how? 32.Qa3?? Qf2# 0–1. horacyad2010 – vuksan, kurnik, 2012.

6.Be2 f5

7.0–0 a6 B1) 8.a3 Be7 9.d4 e4 10.Nfd2 Ngf6 11.Nc3 d5 (11...0–0+= 0.50 12.d5+= 0.53) 12.f3+= 0.44; B2) 8.Nc3 c5 (8...d5 9.cd5 Bb4 10.Ne5 Bc3 11.Bc3 Bd5+/– 0.87 12.Bh5+/– 1.00; 8...Be7 9.d4 c6 10.a4 e4 11.Nd2 Ngf6 12.Qb3+= 0.47; 8...Ngf6 9.d4 c5 10.a3 cd4 11.ed4 Rc8 12.Re1+= 0.69; 8...c6 9.Qc2 Qf6 10.d4 Nh6 11.d5 Rc8 12.Rfd1+= 0.69) 9.a3 Be7 10.d4 cd4 11.ed4 e4 12.Ne1+= 0.47.

7.0–0 c5 8.b5 (8.a3 e4 9.Ne1 Ngf6 10.d4 Be7 11.Nc3 a5 12.b5+= 0.34) 8...g5 (8...a6 9.ba6 Ra6 10.d4 e4 11.Nfd2 Ngf6 12.d5+= 0.56; 8...e4 9.Ne1 Ngf6 10.f3 a6 11.ba6 Ra6 12.d3+= 0.38) 9.d4 Bg7 10.de5 de5 11.Nc3 (11.Nfd2 Ngf6 12.Bf3+= 0.38) 11...g4+= 0.37 12.Ne1+= 0.38.

7.0–0 Be7 A1) 8.a3 a5 (8...c6 9.Qc2 Nh6 10.Nc3 0–0 11.d4 e4 12.Nd2+= 0.41) 9.b5 Bf6 10.Nc3 Ne7 11.d4 0–0 12.Qb3+= 0.38; A2) 8.d4 e4 9.Nfd2 Ngf6 (9...d5 10.Qb3 Ngf6 11.Nc3 c6 12.Rac1+= 0.50) 10.d5 0–0 11.Nb3 Ne5+= 0.47 12.Nd4+= 0.38.

7.0–0 Ngf6 8.d4 e4 9.Nfd2 (9.Ng5 d5+/–) 9...g6 10.d5 Bg7 11.Nb3 Qe7 12.N1d2 0–0 13.Nd4 Ne5 14.Ne6 Rf7 15.Be5 de5 16.a3 c6 17.dc6 Qe6 18.cb7 Rb7 19.Qb3 Nd7 (19...Rd8 20.Rfd1=) 20.Rac1 Bf8 21.Rfd1 Rc8 22.a4 a5 23.ba5 Nc5= 24.Qb5 ba5 25.Qa5 Rb2 26.Bf1 Qc6 The isolani on a4 becomes a target 27.Rb1 Rc2 28.Nb3 Na4 29.Qe5+/– Bg7 30.Qd5 Qd5+= 31.cd5 Nc3 32.d6 Nb1 33.Rb1 Rd8 34.Rd1 Be5 35.d7 Kf8 36.Rd5 Bb8?? 37.g3 Ke7+= 38.Nc5? Bd6 39.Nb7 Rd7 40.Nd6 Rd6 41.Ra5? Rd1 42.Kg2 1–0. olawoj – varin123, kurnik, 2012.

7.Nc3 c5 8.bc5 dc5 9.Qa4 Ngf6 10.Ne5 Bg2 11.Rg1 Bb7 +/–.

7.Nc3 Ngf6 8.Ng5 (8.0–0 c5 9.a3 a5 10.b5 Qc7 11.d4 cd4+/– 0.72) 8...Qe7 9.Nb5 (9.0–0 d5 10.Nb5 Kd8 11.f4 a6+= 0.53) 9...Nb8 (9...Bg2? 10.Rg1 (worse is 10.Nc7 Kd8 11.Nge6 Kc8+/–) 10...Bc6 11.Nc7 Kd8 12.Na8 Ba8 13.Qa4+–) 10.0–0 a6 (10...c6 11.Nc3 d5+= 0.41) 11.Nc3 h6 (11...d5+= 0.37) 12.Bf3 Nbd7?? (better is 12...Bf3 13.Nf3 Qe6 14.Qa4 c6+=) 13.Bb7+– Rb8 (13...Ra7 14.Nd5 Qd8 15.Ne6+–) 14.Nd5 (14.Ba6?! hg5 15.Nb5 c5+–) 14...Nd5 15.Qh5 (15.Qh5 Kd8 16.Nf7 (16.Bd5?! Qg5 17.Qe2 b5+/–; 16.cd5?! Qg5 17.Qg5 hg5 18.Ba6 b5+/–) 16...Qf7 17.Qf7 Nb4 18.Bf3+–; 15.Bd5 hg5 16.b5 g4 17.ba6 Qh4=; 15.cd5?! hg5 16.Bc6 g6+/–) 1–0. pierre – moonedu2, internet, 2008.

5.c4 Ngf6

6.Nc3 e6 7.d4 g6 (7...c5 8.a3=) 8.Be2 Bg7 9.a4 (9.0–0 0–0+=) 9...a5 (9...c5 10.Qb3=) 10.b5+= 0–0 11.Qc2 Re8 12.0–0 Rc8 13.Rac1 (13.e4 Qe7+=) 13...e5 (13...Re7 14.e4+=) 14.de5 (14.d5 Nc5+=) 14...Ne5 (14...Bf3 15.Bf3 Ne5 16.Bb7+=) 15.Ne5 Re5 16.Nd1 Re8 17.Bd4 (17.f3 Nd7=) 17...Nd7 18.Bg7 Kg7 19.f3 (19.Nc3 Qg5 20.Nd5 Nf6=) 19...f5=+ 20.Qc3 (20.Rf2 Nc5=+) 20...Kg8 (20...Qf6 21.Qc2=+) 21.Qd4 (21.Bd3 Nc5=+) 21...Nc5 22.Qf4 (22.Rc3 Na4 23.Ra3 Nc5=+) 22...Qe7 (22...Qf6 23.Re1–/+) 23.Ra1=+ Qg7 (23...Qe5 24.Qe5 Re5 25.Kf2=+) 24.Ra3 Re5 (24...Re7 25.Bd3=+) 25.h4 (25.Bd3 Rce8=+) 25...Rce8 (25...Ne6 26.Qh2–/+) 26.Bd3 Qe7 (26...Qf6 27.Qg5 Qg5 28.hg5–/+) 27.Bc2 Nd7 (27...Ne6 28.Qh2=+) 28.Rc3 (28.h5 Nc5=+) 28...Rc5 (28...Qf6 29.Qh6=+) 29.Re1 (29.h5 g5 30.Qg3 Qf6=+) 29...Re5 (29...Ne5 30.Rf1=+) 30.Kf2 (30.Rf1!?=) 30...Qg7 31.Re2 (31.Qg5 Nf6 32.Qg3 Nh5=+) 31...Nc5–/+ 32.Rd2 h6 (32...Ne6 33.Qg3=+) 33.Qg3 g5 (33...R8e6 34.Kg1=+) 34.hg5= hg5 35.Qh2 (35.Kg1 f4 36.Qf2 Rf8 37.ef4 gf4=+) 35...f4 36.e4 (36.ef4 gf4 Combination) 36...R8e6 (36...Kf7 37.g3 Rh8 38.Qg1–/+) 37.Ke2 (37.g3!?=+) 37...Rh6–+ 38.Qg1 g4 39.Kf1? (39.Nf2 gf3 40.Rf3 Ne4 41.Be4 Be4 42.Ne4 Re4 43.Kf2 Qe5–+) 39...Rg5 (better 39...Qh8!? 40.Nf2 Rg5 41.Rb3–+) 40.fg4 (40.Ra3 Qh8 41.Qd4 Rh1 42.Ke2 Qh2–+) 40...Rg4 41.Re2 Rgh4 42.Rh3 f3 (worse 42...Rh3 43.gh3 Rh3 44.Rg2 Rf3 45.Ke2–+) 43.Re3 (43.Rd2 Be4 44.Rh4 fg2 45.Rg2 Bg2 46.Qg2 Rh4 47.Ne3 Rf4 48.Kg1–+) 43...fg2?? (better 43...Rh3 44.gh3 Rg6–+) 44.Qg2–/+ Rh3 (44...Qg2 45.Kg2 Be4 46.Be4 Ne4 47.Rh4 Rh4 48.Re2–/+) 45.Rh3 Qg2 (45...Rg6 46.Qh1–/+) 46.Kg2 Rh3 (46...Re6 47.Nc3 Ne4 48.Be4 Be4 49.Kf2–/+) 47.Kh3 Be4 (47...Ne4 48.Kg4–/+) 48.Be4 Ne4 49.Kg4 Nd2 50.Ne3 (50.Nb2 Kf7–/+) 50...Kf7 51.Kf5 Ke7 52.Nd5 Kd7 53.Ne3 Nb3 (53...c6 54.Kf4–/+) 54.Nd5 (54.Nd1 c6–/+) 54...Nc5 55.Nc3 Nd3 (55...d5!? 56.Nd5 Na4 57.Ke5–/+) 56.Ke4 Nb4 (56...Nb2 57.Kd4–/+) 57.Kf5 (57.Ne2 Na2=+) 57...c5 (57...c6 58.Ke4–/+) 58.Kf6 (58.Kf4 Ke6 59.Ke4 d5 60.cd5 Kd6–/+) 58...d5!–/+ 59.cd5 (59.Nd5 Nd5 Combination; 59.cd5 Kd6 Decoy) 59...Kd6 60.Kf5 Nd5 61.Ne4 Kc7 (61...Kd7 62.Ke5 Ne3 63.Nc3–/+) 62.Ke5 (62.Ke6 Ne3–/+) 62...Ne3 63.Nc3 Nc4 64.Ke6 Nb2 65.Nd5 Kb7 66.Nc3 Nd3 67.Kd6 Nf2 68.Kd7 Ng4 69.Ke6 Ne3 70.Kd6 (70.Ke5 Nc2–/+) 70...Nf5 (70...Nc4 71.Kd5 Nd2 72.Kd6–/+) 71.Kd7 Nd4 (71...Ka7!?=+) 72.Ne4= Ne2 (72...Ka7 73.Nd6=) 73.Nd6 Kb8 74.Kc6 Nc3 75.Kb6 Na4 76.Ka5 Nc3 77.b6 Nd5 78.Kb5 Nb6 ½–½. Mc Cartney,Patrick (2065) – Zimmer,Ralph (2170), 115. US Open, 2014.

6.Nc3 g6 7.a4 Bg7 8.a5 0–0 9.a6 Bc8 10.Qc2 Nb8 11.b5 Bg4 12.Nd4 e5 13.Ne4?? (better is 13.Nb3=) 13...Bf5?? (better is 13...ed4 14.Nf6 Qf6 15.Bd4 Qd4 16.ed4 Re8 17.Be2 Be2–+ (17...Re2?! 18.Kd1–+)) 14.Nf5+– gf5 15.Ng3 f4 16.ef4 ef4 17.Nf5 Re8 18.Be2 f3 19.gf3 Kf8 20.Ng7 Kg7 21.Qf5 Nbd7 22.Kd1 Re6 23.f4 Qe7 24.Bd3 Kf8 25.f3 h6? 26.Qh3 h5 27.f5 Re5 28.Be5 Qe5 29.Kc2 Qc5 30.f4 d5 31.Qe3 d4 32.Qf3 Rb8 33.Rhg1 Qb4 34.Qg2 Qd6?? 35.Qg7 Ke8 36.Rge1 Kd8 37.Qf7 c6 38.Re6 Qf4 39.Rf6 cb5 40.Re1 Rc8 41.Qe8 Kc7 42.Rc6! Kc6 43.Qc8 Qc7 44.Re6 (44.Re6 Kc5 45.Qc7 Kb4 46.Qc6 Nc5 47.Qb5 Ka3 48.Re1 Nd3 49.Qb3; 44.Qa8 Qb7 45.Qb7 Kd6 46.Re6 Kc5 47.Qc6 Kb4 48.Qb5 Ka3 49.Qb3) 1–0. Leon Manas,Jose Francisco (1720) – Diaz Mendoza,Eladio, Gran Canaria ESP, 3rd Mendoz Mem, 2011.

5.d4 e5 6.b5=.

5.d4 h6 6.Be2 e6 7.0–0 a6 8.c4 Ne7 9.Nbd2 Ng6 10.a3 Bf3 (10...Be7!?+=) 11.Bf3+/– (11.gf3?! d5=) 11...Rb8 12.Qc2 h5 (12...c5 13.d5 e5 14.Qa4+/–) 13.h3 (13.Rfd1 Be7+–) 13...b5 14.c5 (14.d5 Nge5+–) 14...dc5 (14...d5 15.e4 de4 16.Ne4+/–) 15.dc5 Qe7 16.Rfd1 f5 17.Nb3 Kf7 18.Nd4 Kg8?? 19.Nc6 Qe8 20.Nb8 Qb8 21.Rd7 Qc8 22.Rad1 Kh7 23.Bh5 (23.Bh5 Qe8 24.Rc7+–) 1–0. Fournier,Frederic (1880) – cabedoya, Active, 2011.

5.Be2 e5

6.0–0 Be7 7.d4 ed4 8.Nd4+= (8.Qd4?? Bf6 9.Qd3 Bb2–+; 8.ed4?! Ngf6=) 8...Ngf6 9.b5 (9.Bb5 0–0+=) 9...0–0 10.Bf3 Bf3 11.Qf3 Nc5 (11...Ne5 12.Qg3=) 12.a4 (12.Nc6 Qe8 13.Ne7 Qe7 14.Bf6 Qf6 15.Qf6 gf6+/–) 12...Ne6 (12...a6!?+=) 13.Nc6+/– White prepares the advance a5 13...Qd7 (13...Qe8 14.a5+/–) 14.a5 Nd8?? (better is 14...Rae8+/–) 15.Ne7+– Qe7 16.Qa8 Ne6 17.Qa7 Ng4 18.ab6 Qh4 19.h3 Nh6 20.bc7 Ng5 21.Qb8! Nh3 22.gh3 Qh3 23.Qf8! Kf8 Decoy theme: f8 24.Ra8 Ke7 25.c8Q Ng4 The mate threat is Qh2 26.Qe8 1–0. b4_player – opponent, gamecolony.com, 2007.

6.0–0 Ngf6 7.c4 Be7 8.b5 0–0 9.d4 a6 (9...e4 10.Nfd2=) 10.a4 (10.de5 de5 11.Ne5+= (worse 11.Be5 Bf3 12.Bf6 Bf6 13.Bf3 Ra7=+)) 10...ab5 (10...e4 11.Nfd2=) 11.ab5 Ra1 12.Ba1 Qa8 (12...e4 13.Nfd2+=) 13.Nc3 ed4 14.Qd4 Nc5 (14...Ne5 15.Ne5 de5 16.Qe5+=) 15.Bb2 Nce4 (15...Re8 16.Ra1 Qc8 17.Ra2=) 16.Ra1+– Nc3 17.Bc3 Qc8 18.Ra7 (18.Bd3 Nh5 19.e4 Bf6+=) 18...Be4 (18...Rd8 19.Ng5+=) 19.Ng5+– Bg6 (19...Bf5 20.Bf3+–) 20.Bf3 (20.Bd3 Qb8 21.Ra4 Qc8+–) 20...h6 (20...Qf5 21.Ne4 (21.Rc7?! Bd8 22.Rc6 Qg5=) 21...Rc8 22.Bb2+–) 21.Nh3 Qf5 (21...Ne8!?+–) 22.Rc7+– Qb1 (22...Bd8 23.Rc6 d5 24.Nf4 Qb1 25.Qd1 dc4 26.Ng6 Qd1 27.Bd1 fg6 28.Be2+–) 23.Qd1 Bd8 (23...Qd1 24.Bd1 Bd8 25.Rc6+–) 24.Qb1 Bb1 25.Rc6 Ba2 (25...Bf5 26.Bf6 Bf6 27.Nf4+–) 26.Nf4 (26.Rd6?! Bc4 27.Bf6 gf6+–) 26...Be7 (26...Re8 27.Nd5 (27.Rd6?! Bc4 28.Bf6 gf6+–) 27...Nd7 28.Rd6+–) 27.Nd5 (worse 27.Rb6 Bc4 28.Rb7 Bd8+–) 27...Nd5 28.Bd5 Rb8 (28...Bb3 29.Bd4+–) 29.Rc7 Re8 (29...Kf8 30.Bg7! Kg7 31.Re7+–) 30.Bc6 Bd8 (30...Kf8 31.Be8 Ke8 32.Bg7 Bd8+–) 31.Ra7 (31.Be8?! Bc7 32.Bc6 Bc4+–) 31...Bf6 (31...Re7 32.Ra2 Kh7 33.Bd5+–) 32.Be8 Bc3 33.Ra2 Bb4 (33...Kf8 34.Bc6 f5 35.Ra6+–) 34.Ra7 f6 (34...Kh7 35.Bf7 g5 36.Be8 Kg8 37.Bc6+–) 35.Bg6 Kf8 36.Rf7 Kg8 (36...Ke8+–) 37.Re7 d5 38.Re8 Bf8 39.cd5 h5 (39...f5 40.d6 h5 41.d7 h4 42.Rf8 Kf8 43.d8Q) 40.d6 h4 41.d7 h3 (41...f5 42.Rf8! Kf8 43.d8Q) 42.d8Q hg2 43.Rf8 1–0. Janek – Naja, internet free game, 2017.

6.a3 Qe7 7.d3 0–0–0 8.0–0 h5 9.h3 (9.a4!?+=) 9...g5+= 10.e4 (better is 10.Nfd2!?+=) 10...g4–/+ 11.hg4?? (better is 11.Nfd2 gh3 12.gh3–/+) 11...hg4–+ 12.Nh2 (12.Re1–+) 12...Qh4 13.f4 Qh2 14.Kf2–+ Qf4 15.Ke1 Qg3 16.Kd2 Bh6 17.Kc3 d5 18.ed5 Bd5 19.Nd2 Bd2 20.Qd2 Ngf6 21.Rae1 e4 22.Rf5 e3 23.Qd1 Rh5 24.Rh5 Nh5 25.Bg4 Nf4 26.Bd7 Rd7 27.Bc1 Qg7 28.d4 e2 29.Qd2 Ng2 30.Rg1 e1Q 31.Re1 Ne1 32.Qe1 Be6 33.Be3 c5 34.bc5 bc5 35.Kb2 cd4 36.Bd2 d3 37.Kc1 Qa1 0–1. Fournier,Frederic (1820) – parlay (1680), Active, 2007.

6.0–0 g6

7.d3 Bg7 8.Nbd2 Ne7 9.c4 0–0 10.Qc2 Nf5 11.h3 Nh4 12.Nh4 Qh4 13.Nf3 Qe7 14.e4 f5 15.Nd2 f4 16.Bf3 Bc8 17.Nb3 Nf6 18.d4 White prepares c5 18...Nh5 19.de5 de5 20.c5 Qh4 21.Kh2 g5 22.Qd1 Ng3?? 23.fg3 Qg3 24.Kh1 g4? 25.hg4 Rf6?? 26.g5 Qg5 27.Kg1 Qg3?? 28.Qe1 Qg5 29.cb6 cb6 30.Rd1 Ba6 31.Rf2 Rh6 32.Rfd2 Qh4 33.Qh4 Rh4 34.Rd8 Rd8 35.Rd8 Bf8 36.Be5 Kf7 37.Rd7 Ke6 38.Ra7 Be2 39.Be2 Ke5 40.Bf3 Bb4 41.a4 1–0. ejdrzej (1625) – letargi, kurnik, 2011.

7.Ne1 Bg7 8.f4 Ne7 9.fe5 Ne5 10.d4 Nd7 11.c4 0–0 12.Nd3 Nf6 13.Qe1 Nf5 14.Bf3 Bf3 15.Rf3 Qd7 16.Qf2 Rae8 17.Nd2 Ng4 18.Qf1 Nge3 19.Qb1 Nd4 20.Bd4 Bd4 21.Kh1 Ba1 22.Qa1 Qg4 23.Ne1 Nc4 24.Nc4 Qc4 25.h3 Re2 26.Nd3 Qc2 27.Qf6 Rg2 28.Rf2 Rf2 29.Nf2 Re8 30.Kg2 Qa2 31.h4 Re2 32.Qd8 Kg7 33.Qg5 Rf2 34.Kh3 Qb3 35.Kg4 Rg2 36.Kf4 Rg5 37.hg5 Qb4 38.Ke3 f6 39.gf6 Kf6 40.Kd3 Kf5 41.Ke3 d5 42.Kd3 Kf4 43.Ke2 Qb3 44.Kd2 d4 45.Ke2 Qc2 46.Ke1 ½–½. elsh1403 – letargi, kurnik, 2012.

7.h3 Bg7 8.d3 Ne7 9.Nbd2 0–0 10.c4 a5 11.a3 Nf5 12.Nh2 Nf6 13.f4?? (13.e4 Nd4=) 13...Nh4?? (better is 13...Ne3 14.Qb3 Nf1 15.Rf1 ef4 16.Rf4 Qe7–+) 14.Nhf3 Nf5 15.fe5 de5 16.Qe1 Ne3 17.Rf2 Nc2 18.Qb1 Na1 19.Qa1 Nh5 20.Be5? Be5 21.Qe5 f6 22.Qe6 Kg7 23.Nh4 Re8 24.Qg4 1–0. horacyad2010 – letargi, kurnik, 2011.

7.d4 Bg7

8.c4 Ne7 9.d5 0–0 10.e4 Bc8 11.Nc3 f5 12.a4 f4 13.Ng5 Nf6 14.h3 h6 15.Nf3 g5 16.Ba3 Ng6 17.Rc1 g4 18.hg4 Ng4 19.c5 Nh4 20.cd6 cd6 21.Nb5 a6 22.Nc7 Ra7 23.Ne6 Be6 24.de6 h5 25.b5 a5?? 26.Qb3 Re7?? 27.Rfd1 Bf6 28.Rd6 Qe8 29.Rd7 Qg6 30.Be7 Nf2 31.Nh4 Nh3 32.Qh3 (32.Qh3 Bh4 33.Bf8 Bf2 34.Kh1 Bc5 35.Bh5 Qf6 36.Bf7 Kf8 37.Bg6 Be7 38.Rc8 Bd8 39.Qh6 Kg8 40.Rcd8 Qd8 41.Rd8#) 1–0. elsh1403 – letargi, kurnik, 2012.

8.c4 Nh6 9.a4 0–0 10.d5 a5 11.ba5 Ra5 12.e4 Qe7 13.h3 Rfa8 14.Nbd2 Nc5 15.Nb3 Nb3 16.Qb3 Qd7 17.Bd1 Bc8 18.Bc3 R5a7 19.Bc2 Qe8 20.Ra2 Bd7 21.Rfa1 Bf8 22.a5 ba5 23.Ra5 Ra5 24.Ra5 Rb8 25.Qa3 f5 26.Ng5 fe4 27.Be4 Nf5 28.Ra7 h6 29.Ne6 Be6 30.de6 Ng7 31.Rc7 Ne6 32.Bd5 Kh8 33.Ra7 Nf4 34.Kh2 Be7 35.Qa1 Qf8 36.g3 Nh5 37.Be1 Bg5 38.h4 Ng3 39.fg3 Bh4 40.gh4 Qf4 41.Bg3 Qd2 42.Kh3 g5 43.Qf1 g4 44.Kg4 Rg8 45.Kh3 Rg3 46.Kg3 Qe3 47.Qf3 Qf3 48.Kf3 h5 49.Rd7 e4 50.Be4 Kg8 51.Rd6 Kf8 52.Rh6 Ke8 53.Rh5 Ke7 ½–½. elsh1403 – conill (1675), kurnik, 2012.

8.Nfd2 Ne7 9.c4 0–0 10.Qb3 a5 11.a3 Nf5 12.Nf3 ab4 13.ab4 Ra1 14.Ba1 Bf3 15.Bf3 ed4 16.e4 Nh4 17.Be2 Qg5 18.g3 f5 19.Kh1 fe4 20.gh4 Qh4 21.Qg3 Qh6 22.Nd2 Be5 23.Qg4 Qh2 0–1. elsh1403 – letargi, kurnik, 2012.

8.de5 Ne5 9.Ne5 de5 10.Bb5 c6 11.Bc4 Ne7 12.Nc3 0–0 13.a4 Nf5 14.Ne4 (14.Qg4 Qe7=) 14...Qh4 15.Bd3 Rad8 16.Qe2 Nh6 17.Rfd1 Ng4 18.h3 Nf6 19.Nf6 (19.Be5? Ne4 20.Bg7 Kg7–+) 19...Bf6 20.Qg4 Qg4 21.hg4 Be7 22.b5 f6 23.Bc4 Kh8 24.Kf1 c5 25.f3 Rd1 26.Rd1 Rd8 27.Rd8 Bd8 28.Ke2 Kg7 29.Bd3 h6 30.c4 Bc7 31.Bc3 h5 32.gh5 gh5 33.Bf5 Kh6 34.e4 1–0. iwan19999 (1620) – letargi, kurnik, 2012.

8.de5 Ne5 9.Ne5 de5 10.Qd8 Rd8 11.Rd1 Rd1 12.Bd1 Ne7 13.f4 Nc6 (better is 13...Nf5!?+=) 14.b5 Nb4 15.Be5 Be5 16.fe5 Ke7 17.a3 Nd5 18.e4 Ne3 19.Nd2?? (better is 19.Nc3=) 19...Rd8–+ 20.Kf2 Ng4 21.Kg3 Ne5 22.Nf3 f6 23.Ne5 fe5 24.Bf3 Rd2 25.Rc1 c6 26.c4 Rd3 27.a4 Ra3 28.c5 bc5 29.Rc5 cb5?? 30.Re5?? Kf6 31.Rb5 Bc6 32.Rc5 Ba4 33.Rc7 a6 34.Rh7 Bb5 35.Rb7 Rc3 36.Rb6 Kg7 37.e5 Be8 38.e6 a5+/– 39.Ra6 Rc5 40.Ra7 1–0. elsh1403 – letargi, kurnik, 2012.

5.Be2 Ngf6

6.0–0 e5 7.c4 Be7 8.d4 c5 9.bc5 e4 10.Nfd2 dc5 11.d5 0–0 12.Nc3 a6 (12...Bd6!?+=) 13.Nce4 Ne4 14.Ne4 Nf6 15.Ng3 Bd6 16.e4 (better is 16.Bd3+–) 16...Qe7?? (better is 16...Bg3!? 17.fg3 Ne4+/–) 17.Bd3 (better is 17.Nf5 Bh2 18.Kh2 Qe4+–) 17...Be5 18.Qc2 Bc8 19.Nf5 Bf5+/– 20.ef5 g6?? 21.Rfe1 Nd7 22.f4! Bd4 23.Bd4 Qe1 24.Re1 cd4 25.fg6 fg6 26.f5 Nc5 27.fg6 hg6 28.Bg6 Rf6 29.Re8 Re8 30.Be8 Kf8 31.Qe2 d3 32.Qh5 d2 33.Bc6 Ne4 34.Ba4 Nc3 35.Bc2 b5 36.c5 a5 37.c6 Ke7 38.Qe5 Kf7 39.Qc3 Rf4 40.Qf3! Rf3 41.gf3 Ke7 42.Kf2 Kd6 43.Ke3 b4 44.Kd2 Kc5 45.c7 Kd5 46.c8Q Ke5 47.Qc5 Kf4 48.Qa5 b3 49.h4 b2 50.Qb4 (50.Qb4 Kf3 51.Bd1 Kf2 52.Qf4 Kg2 53.Bf3 Kf2 54.Bd5 Kg1 55.Qg5 Kf2 56.Qg2; 50.Ke2 Kg3 51.Qg5 Kh3 52.Kf2 b1Q 53.Qg3) 1–0. elsh1403 – roburb, kurnik, 2011.

6.a3 g6 7.c4 Bg7 8.0–0 0–0 9.d4 Rb8 (9...c5 10.Nc3+=) 10.Nbd2 (10.Nc3 a5+=) 10...a6 11.Qc2 Bh8 12.d5 (12.Qd3 c5+=) 12...Ba8 (12...c6 13.e4+=) 13.e4 (13.Nd4 Re8+/–) 13...Bg7 (13...c6 14.Nd4 Rc8 15.dc6 Bc6 16.Nc6 Rc6 17.Rfd1+=) 14.Nd4+/– Bb7 (14...Rc8 15.Nc6 Bc6 16.dc6+/–) 15.f4 Bh8? (15...Ra8 16.e5! de5 17.Nc6 Bc6 18.dc6+/–) 16.N2f3 (16.Nc6 Qe8 17.e5 Bc6 18.dc6 de5 19.fe5 Ne5 20.Be5 Qc6+–) 16...Ba8? (better is 16...Re8!?+/–) 17.Nc6+– Bc6 18.dc6 1–0. Fournier,Frederic (1760) – zzzolc, Active (5/0), 2005.

6.b5 g6 7.c4 Bg7 8.0–0 0–0 9.d4 c6 (9...a6 10.Nc3=) 10.Nc3+= cb5 11.cb5 Re8 12.a4 e5 13.de5 de5 14.Qc2 e4 (14...Rc8 15.Rfd1=) 15.Nd2 Nc5 16.Ba3 (16.Rfd1!? Qc7 17.Nb3+=) 16...Rc8 17.Rfd1 (17.Nc4 Nd5 18.Nd5 Bd5–/+) 17...Qc7 (better 17...Nd3 18.Qb3 Nf2–/+) 18.Qb3?? (18.Rac1 Red8 19.Nb3 Rd1 20.Nd1 Ne6 21.Qc7 Rc7 22.Rc7 Nc7=) 18...Red8 (better 18...Nb3 19.Nb3 Qc3–+) 19.Qb2?? (better 19.Bc5 Qc5 20.Rac1=) 19...Nd5 (better 19...Nd3 20.Bd3 ed3–+ (20...Qc3?! 21.Qc3 Rc3 22.Be2=+)) 20.Nce4?? (better 20.Rac1–+) 20...Bb2 21.Bb2 0–1. AhmedSultanov – Rashmaster, lichess.org, 2019.

6.d4 a5 7.a3 e6 8.0–0 Be7 9.Nbd2 0–0 10.c3 c5 11.dc5 dc5 12.Nb3 (12.b5!?=) 12...cb4 13.cb4 ab4 14.ab4 Bb4 15.Nbd4 Bc5 16.Qb3 Qe7 17.Ra8 Ra8 18.Ra1 Ra1 19.Ba1 Bd5 20.Bc4 Bd4 21.Nd4?? (21.Bd4 Bf3 22.gf3–/+) 21...Ne4 (better is 21...Qc5–+) 22.Bd5= ed5 23.f3 (23.Nf5 Qc5 24.Qd1 Nef6=) 23...Nd2 (better is 23...Nd6!?–/+) 24.Qc3= Nc4 25.Kf2? Qh4–/+ 26.Kg1 Qg5 27.Kf2 Nf6 28.Ne2 Qf5 29.Ng3 Qg5 30.e4 Qd2?? 31.Qd2+/– Nd2 32.Bf6 gf6 33.ed5 Kf8 34.Ne4 Ne4? 35.fe4+– Ke7 36.Ke3 Kd6 37.Kd4 f5? 38.e5 Kd7 39.Kc4 f6 40.e6 (40.e6 Kd6 41.Kb5+–) 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

6.d4 a5 7.a3 e6 8.0–0 Be7 9.Nbd2 0–0 10.c4 c5 11.dc5 dc5 12.b5 Qc7 13.Qc2 Rad8 14.Rad1 Ng4 15.h3 Nge5 16.Ne5 Ne5 17.Be5 (17.f4 Ng6=) 17...Qe5 18.Bf3 Qc7 19.Bb7 Qb7 20.Nf3 Bf6 21.Rd8 Rd8 22.Rd1 Qc7 23.Rd8 Qd8 24.Qd2 Qd2 25.Nd2 a4 26.Nb1 h5 27.Kf1 g5 28.Ke2 Bg7 29.g4 hg4 30.hg4 Kf8 31.f3 Ke7 32.Kd3 Kd6 33.Ke4 Bb2 34.f4 gf4 35.ef4 f6 36.Kd3 e5 37.Ke4 ef4 38.Kf4 Ke6 39.Ke4 Bc1?? (better is 39...Bd4=) 40.Nc3+– Ba3 (40...Bd2 41.Nd5 (41.Na4?! Ba5+–) 41...Ba5 42.Nf4 Kf7 43.Kf5+–) 41.Na4 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

6.h3 g6 7.c4 Bg7 8.0–0 0–0 9.d4 e6 10.Nbd2 c5 11.b5 a6 12.a4 ab5 13.ab5 Ra1 14.Qa1 Qa8 15.Nb3 Qa1 16.Ra1 Ra8 17.dc5 Ra1 18.Ba1 dc5 19.Nbd2 Kf8 20.Ne5 Ne5 21.Be5 Nd7 22.Bg7 Kg7 23.Ne4 Be4 24.Kh1 Ne5 25.Kh2 Bd3 26.Bd3 Nd3 27.Kg3 Nb2 28.Kf4 Nc4 29.Ke4 Na3 30.Kd3 Nb5 31.Kc4 Nd6 32.Kc3 b5 33.Kb3 e5 34.f3 f6 35.Kc3 Kf7 36.e4 Ke6 0–1. horacyad2010 – rothul, kurnik, 2012.

6.0–0 g6

7.a3 Bg7 8.h3 0–0 9.Nh2 c5 10.c4 a6 11.d3 b5 12.Nd2 Nb6 13.cb5 ab5 14.bc5 dc5 15.Qc2 Qc7 16.f3 Nfd5 17.Bg7 Kg7 18.Qb2 f6 19.e4 Nf4 20.Nb3 Ne2 21.Qe2 c4 22.Rfc1 cd3 23.Qd3 Qd7?? 24.Qe2?? Nc4 Exerts pressure on the isolated pawn 25.Nc5 Qc6 26.Nb7 Qb7 27.Ng4 Ra3 28.Ra3 Na3 29.Ne3 Rc8 30.Rc8 Qc8 31.Nd5 e6 32.Nb4?? Qc5–+ 33.Kh2 Qb4 34.g4 Qc4 35.Qb2 b4 36.g5 e5 37.gf6 Kf6 38.h4 Qc2 39.Qc2 Nc2 40.Kg3 b3 41.f4 ef4 42.Kf4 b2 43.e5 Ke6 44.Ke4 b1Q (44...b1Q 45.Kf3 Qf1 46.Kg3 Ne3 47.h5 Qg2 48.Kf4 Nd5#) 0–1. cogit – tengri, kurnik, 2011.

7.c4 Bg7 8.Nc3 0–0 9.Rc1 c5 10.b5 a6 11.h3 ab5 12.cb5 Nd5 13.a4 Nc3 14.Bc3 Bc3 15.Rc3 e6 16.Qa1 Ra7 17.Nh2 (17.Ra3 Bf3 18.Bf3 d5=) 17...Qc7 (17...Qa8!? 18.Bf3 Ra4–/+) 18.d4+= Rfa8 19.Bd1 d5 20.Bc2 Qd6 21.Rd1 e5 22.dc5 Nc5 23.Nf3 Na4 (better is 23...Ra5+=) 24.Ra3+/– Ra5 25.Ba4 (25.Ra4?! Ra4 26.Ba4 Qb4 27.Qe5 Qa4+/–) 25...Qa3?? (better is 25...d4 26.Ne1 Be4+–) 26.Qa3+– Ra4 27.Qe7 R8a7 28.Ne5 Bc8 29.Qe8 Kg7 30.Qc8 h6 31.Rd5 Ra1 32.Kh2 Ra8 33.Qc6 R8a7 34.Rd7 R1a5 35.Rf7! Rf7 (35...Rf7 36.Qg6 Mate attack). lican – tengri, kurnik, 2012.

7.c4 Bg7 8.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 b6 6.Be2 Bb7 7.0–0 d6 8.d4 Nbd7).

7.h3 Bg7 8.d3 0–0 9.Qc1 c5 10.bc5 Nc5 11.Nc3 Nd5 (11...Rc8!?=) 12.Nd5+= Bd5 13.Bg7 Kg7 14.e4 Bb7 15.Qb2 f6 16.Rad1 Na4 17.Qa1 Qd7 18.Ng5 h6 (better is 18...e5 19.Bg4 f5 20.ef5 gf5=) 19.Bg4+/– Qc6 20.Ne6 Kf7 21.Nf8 Rf8 22.Bf3 Nc3 23.Rde1 e6 24.e5+– d5 25.ef6 Kf6 26.Qc1 Kg7 27.Qe3 Bc8 28.Qd4 Kh7 29.Bg4 Re8 30.Be6?? Re6 31.Re6= Be6 32.Re1 Bf7?? 33.Re7+– Kg8 34.Qe5?? Nb5 35.Qb8 Kg7+= 36.Rd7?? Qe6 (36...Qe6 37.Rb7 Nd4+=). lican – tengri, kurnik, 2012.

7.h3 Bg7 8.d4 0–0 9.c4 c5 10.bc5 dc5 11.d5 Nd5?? (better is 11...e6=) 12.Bg7+– Ne3 13.fe3 Kg7 14.Nc3 Ne5?? (better is 14...Nf6+–) 15.Ne5 1–0. lican – tengri, kurnik, 2012.

4.Nf3 e5

5.b5 (--> 1.b4 e5 2.Bb2 d6 3.b5 b6 4.e3 Bb7 5.Nf3).

5.Bb5 c6 6.Be2 Nf6 7.0–0 Nbd7 8.d4 ed4 (8...e4 9.Nfd2=) 9.Nd4+= Be7 (9...c5 10.bc5 dc5 11.Nf5+=) 10.Nf5+– 0–0 11.Nd6 Bd6 (11...Qc7 12.Nb7 Qb7 13.b5+–) 12.Qd6 Re8 13.Rd1 Re6 14.Qg3 Qe7 (14...Qb8 15.Qb8 Rb8 16.Nc3+–) 15.Bc4 Re4 (15...Qb4 16.Bb3 Ree8 17.Qc7+–) 16.Bd3 (16.Nd2 Rg4 17.Qc7 Bc8+–) 16...Rg4? (better 16...Nh5 17.Qh3 Rh4 18.Bh7 Kh7 19.Qf5 Kg8 20.Qd7 Kf8+–) 17.Qc7 Rb8 (17...Bc8 18.Bf5 Rb4 19.Bf6 Qf6 20.Bd7 Bd7 21.Qd7+–) 18.Bf5 Rg2 (18...Nd5 19.Qd7 Qd7 20.Bd7 Rb4+–) 19.Kg2 Nd5 (19...c5 20.Kg1 Ne8 21.Qd7 Qg5 22.Kf1+–) 20.Qg3 N7f6 (20...f6 21.e4 Re8+–) 21.Qb8 Qf8 22.Qb7 g6 23.Qc6 Qb4 24.Bf6 gf5 25.Qa8 Qf8 26.Qf8 Kf8 1–0. DEFFM – xhevis, freechess.org, 2019.

5.Bb5 Nc6 6.0–0 (6.c4 a6 7.Ba4 Qd7=) 6...a6 7.Ba4 (7.Bc6!? Bc6 8.Nc3=) 7...b5=+ 8.Bb3 Nb4 9.d4 (9.a4 c5 10.d3 e4=+) 9...ed4 (9...e4!? 10.Ne1 Nf6–/+) 10.ed4= Nd5 11.c4 (11.Re1 Be7=) 11...bc4 12.Bc4 Nb6 (12...Ngf6 13.Nc3=+) 13.Bb3 (13.Re1 Ne7 14.Bd3 Rb8=) 13...d5 (13...Nf6 14.Re1 Be7 15.Qe2=) 14.Qd3 (14.Re1 Be7=) 14...Nf6 (14...Bd6 15.Re1 Ne7 16.Bc2=+) 15.Re1= Be7 (15...Ne4 16.Nc3 f5 17.Ne5=) 16.Ba3 Ne4 17.Be7 Qe7 18.Nbd2 (18.Nfd2 0–0 19.Nc3 Qh4 20.Nde4 de4 21.Ne4 Rad8+=) 18...0–0 (18...f5 19.Ne5 Qg5 20.Ne4 fe4 21.Qc2+=) 19.Bd5 Bd5 (19...Nd5 20.Ne4 Nb4 21.Qb1 Be4 22.Re4+=) 20.Ne4+= Be4 (20...Qd8 21.a4=) 21.Re4 Qd6 22.Ne5 Nd5 23.Rh4 (23.Rc1 Rab8=) 23...Nf6 24.Rc1 (24.Ng4 h6=) 24...h6 (24...Rfe8 25.Qb3 Re7 26.Qa4=) 25.Rc6+= Attacking the isolated pawn on a6 25...Qd8 (25...Qb4 26.Rc7 Qb2 27.a3 Qa1 28.Qf1 Qa3 29.Rb7=) 26.Qg3 (26.Ra6 Ra6 27.Qa6 Qd5+=) 26...Kh7 (26...Rb8 27.Rc1 Qd5 28.Ng4=) 27.Nf3 (better 27.a3+–) 27...Qe8? (better 27...Qd5 28.Rc7 Qa2=) 28.Rf6!+– (28.Qc7?! Rc8 29.Qc8 Qc8 30.Rc8 Rc8=) 28...Qe2?? (28...gf6 29.Qf4 Double attack (29.Qf4 Decoy)) 29.Rfh6! gh6 (29...gh6 30.Ng5 Mate attack) 30.Ng5 Kg6 31.Ne4 Kf5 32.Qe5 Kg6 33.Qf6 Kh7 34.Rh6 Kg8 35.Qh8 (35.Rh8) 1–0. DEFFM – saviraj, freechess.org, 2018.

5.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 b6 4.e3 Bb7 5.Nf3).

5.c4 Be7 6.Be2 Nf6 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 b6 7.0–0 Bb7).

5.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 b6 5.Nf3 Bb7).

5.Bc4 Nf6 6.0–0 Be7 (6...e4!? 7.Nd4 d5=+) 7.d3 0–0 8.Nbd2 Nbd7 9.a3 c6 10.Bb3 Rc8 11.Nc4 b5 12.Na5 Ba8 13.c4 bc4 14.dc4 e4 (14...c5 15.Nh4=) 15.Nd4+= c5 16.Nf5 Ne5 17.Ne7 (17.Qd2 Qd7 18.Ne7 Qe7=) 17...Qe7= 18.b5 Nd3 19.Bc3 Nd7 20.Bc2 N7e5 (better 20...Qe6=) 21.Nb3 (better 21.f4!? Ng6 22.Bd3 ed3 23.Qd3+=) 21...Qg5 22.a4 (22.Nd2 f5=) 22...Nf3 (22...Nc4!? 23.Nd2 Nce5–/+) 23.Kh1=+ Nh4 24.g3 Nf3 25.Nd2 Nde5 (25...Nde5 26.Be5 Ne5 27.Be4 Nc4 28.Ba8 Nd2 29.Qd2 Ra8 30.Qd6 Rfd8+=) 0–1. AustinGrandmaster (1705) – Jamarag (1705), lichess.org, 2020.

5.d3 Nf6 6.Nbd2 Be7 7.Be2 0–0 8.0–0 c5 9.bc5 bc5 10.c3 (10.Rb1 Bc6=) 10...Nc6 11.d4 ed4 (11...Rb8 12.Nb3=) 12.cd4 cd4 (12...Rb8 13.Rc1=) 13.Nd4+= Rb8 14.Bc3 (14.Qa4 Nd7+=) 14...Ne5 (14...Nd5 15.Nc6 Bc6 16.Rc1 Nc3 17.Rc3=) 15.Rb1 Nd5 16.Ba1 Bf6 (16...Bg5+=) 17.N2f3 (17.Qa4!?+–) 17...Nb6 (better 17...Qa5=) 18.Nf5 (18.a4 Be4 19.Rc1 Re8+=) 18...Nf3 (better 18...Be4 19.N3d4 Bb1 20.Qb1 Nbc4–/+) 19.Bf3= Ba1 20.Ra1 White gets in control 20...d5 21.Qd4 Threatening mate: Qxg7 21...f6 (21...Qg5!? 22.Nd6 Ba6+=) 22.Rfd1 Qd7 23.Bg4 Qd8 24.a4 g6 25.Ng3 f5 26.Bf3 a5 27.Rab1 Qd6?? (better 27...Bc6!?+–) 28.Rb5 (better 28.Rb6 Qc7 29.Bd5 Bd5 30.Qd5 Kh8 31.Rc6+–) 28...Ba8 29.Rdb1 (better 29.Ra5 f4 30.Ne4+–) 29...g5?? (better 29...Nd7+–) 30.Rb6 Rb6 31.Rb6 Qd8 (31...Qd7+–) 32.Qe5 (better 32.Ra6 Rf7 33.Bh5+–) 32...Qb6= 33.Bd5 Bd5 34.Qd5 Kh8 35.Qe5 Qf6 36.Qf6 (better 36.Qa5!? Qa1 37.Nf1+=) 36...Rf6–/+ 37.Kf1 Kg7?? (37...h6 38.Ke2–/+) 38.Ke2?? (better 38.Nh5 Kg6 39.Nf6 Kf6 40.Ke2+–) 38...Kg6–/+ 39.Kd3 (39.e4 fe4 40.Ne4 Rc6–+) 39...Rc6 (39...Rd6 40.Kc2–+) 40.Ne2 h5 (40...Rb6 41.Kc2–+) 41.Nd4 (41.Nc3 Rd6 42.Kc2 Kf6–/+) 41...Rc5 (41...Rc1 42.Nb3 Rg1 43.g3–+) 42.f3 (42.Nb3!? Rc7 43.f3–/+) 42...Rc1 43.Nc2? (better 43.Nb3!? Rh1 44.h3–/+) 43...Rg1–+ 44.g3 Rg2 45.Kc4 (45.Nd4–+) 45...Rc2 46.Kb5 Rb2 (46...Rb2 47.Ka6 Rh2 48.Ka5 Rf2–+) 0–1. aravind555 (1630) – Chessurio1 (1660), lichess.org, 2019.

5.d3 g6 6.Nbd2 Bg7 7.c4 Ne7 8.Be2 0–0 9.0–0 Nd7 10.Qc2 c5 11.b5 Nf5 (11...a6 12.Ne4 Qc7 13.ba6 Ra6 14.Nc3=) 12.Rfd1 h6 13.Ne4 Qe7 (better 13...Nf6+=) 14.d4?? (better 14.g4 d5 15.gf5 de4 16.de4+=) 14...ed4–+ 15.ed4? (better 15.Bd3 de3 16.Bg7 Kg7 17.fe3–+) 15...Be4 16.Qd2 Bb7 (16...Rae8!? 17.dc5 Bb2 18.Qb2 dc5 19.Qd2–+) 17.d5 Nf6 (17...Bb2 18.Qb2 Rfe8 19.Re1–+) 18.Bd3 Bc8 19.Qf4 (19.Re1 Qd8 20.h3–+) 19...Nd5! 20.Qd2 (20.cd5 Bb2 Discovered attack) 20...Bb2 21.Qb2 Nf4 22.Bf1 (22.Qd2 Nd3 23.Qd3 a6–+) 22...Nh4 (22...Bb7!? 23.Re1 Qd8 24.Qb3–+) 23.Nh4 Qh4 24.Rd6 Bb7 25.g3 Nh3 26.Bh3 Qh3 27.f4 Rad8 28.Rd2 (28.Rd8 Rd8 29.Re1 Rd4–+) 28...Rfe8 (better 28...Qe6 29.Re2 Qc4–+) 29.Rad1 (29.Rd8 Rd8 30.Re1–+) 29...Rd2 30.Qd2 Bf3 31.Qf2 (31.Rf1 Re2 32.Rf2 Rd2 33.Rd2–+) 31...Bd1 (31...Bd1 32.Qf1 Qd7 33.h3 Qd2 34.f5 Re1 35.Qe1 Qe1 36.Kg2 Qd2 37.Kf1 Bf3 38.fg6 Qe2 39.Kg1 Qg2) 0–1. Goldmund,Heike – Foster,Duncan, FICGS, 2015.

5.Be2 Nc6 6.b5 Nce7 7.c4 Qd7 (7...a6 8.0–0+=) 8.a4 (8.d4 e4 9.Nfd2 d5+–) 8...h6 (8...e4 9.Nd4+=) 9.a5 (9.d4 ed4 10.ed4 a5+–) 9...ba5 (9...a6 10.ab6 ab5 11.Ra8 Ba8 12.c5+=) 10.Ra5 (10.c5 Qe6+–) 10...Nf6 (10...a6 11.d4 ab5 12.Ra8 Ba8 13.cb5 ed4 14.Bd4 Bf3 15.gf3+=) 11.0–0 (11.Qa4 Nc8+–) 11...a6+= 12.Nc3 (12.c5 ab5 13.Bb5 c6 14.Ra8 Ba8 15.cd6 cb5 16.de7 Be7 17.Ne5 Qd5+–) 12...g6 (12...ab5 13.Ra8 Ba8 14.cb5+=) 13.Qc2 Bg7 (13...ab5!? 14.Ra8 Ba8+–) 14.Rfa1+– Qc8 (14...0–0 15.ba6 Nc6+–) 15.Qa4 (15.ba6!? Bc6+–) 15...0–0 (better 15...ab5!? 16.Qb5 Nd7 17.Ra8 Ba8+–) 16.ba6+– Bc6 17.Qa2 (17.Qc2 Qf5 18.Qf5 Nf5+–) 17...Nd7 (17...e4 18.Nd4+–) 18.Nd5 (18.d4 ed4 19.Nd4 Re8+–) 18...Re8 (18...Bd5 19.cd5 (19.Rd5?! e4 20.Bg7 Kg7+=) 19...c5 20.dc6 Nc6 21.Ra3+–) 19.d4 ed4 (19...Ra7 20.de5 Ne5 21.Ne5 de5 22.e4+–) 20.Nd4 Bd5 (20...Bd4 21.Bd4 (21.ed4?! Nd5 22.cd5 Re2 23.dc6 Nb8+=) 21...Nf5 22.Qd2+–) 21.cd5 (21.Rd5 c5 22.Nb5 Nd5 23.Bg7 Nc7 24.Nd6 Ra6 25.Qa6 Qa6 26.Ra6 Re6+–) 21...Nc5 22.Bb5 Rf8 23.Nc6 White prepares a7 (23.Qc4 Ra7+–) 23...Qe8 (23...Nc6 24.Bc6 Bb2 25.Qb2+–) 24.Bg7 (24.Bd4 Kh7+–) 24...Kg7 25.a7 Ng8 (25...Nb7 26.Ra3 Kh7 27.Rb1+–) 26.Qb2 f6 27.Nd4 Qc8 (27...Qf7 28.Bc6 Ne7 29.Ba8 Ra8 30.Rc5 dc5 31.Ne6 Kh7+–) 28.Bc6 Ne7 (28...Nd3 29.Qb1 Ra7 30.Ra7 Nc5+–) 29.Ba8 Qa8 30.Ne6 (better 30.Rc5 dc5 31.Ne6 Kh7 32.Nf8 Qf8 33.a8Q+–) 30...Ne6 31.de6 Nc8 (31...Nd5 32.Rc1 c5 33.Qb5+–) 32.Qc3 (32.Qb8 Nb6 33.Qc7 Kg8 34.Qb6 f5+–) 32...c6 33.Ra6 Ne7 34.Qd4 (better 34.Rb1 Re8 35.Qb4 c5+–) 34...Rd8 (34...Nd5+–) 35.Rb6 Nd5 36.Rb3 (36.Rab1 Nb6 37.Qb6 Rf8 38.Qb7 Qb7 39.Rb7 Kg8+–) 36...Nc7 (36...c5 37.Qd5! Qd5 38.Rb8+–) 37.e7 Rd7 (37...Re8 38.Rb8 Rb8 39.ab8R Qb8 40.Qd6+–) 38.Qe4 (better 38.Rb8 Re7 39.Qd6+–) 38...Kf7 (38...Ne8 39.Qa4 Ra7 40.Qa7 Qa7 41.Ra7+–) 39.Rb8 (39.Rb8 Re7 40.Qf4+–) 1–0. GuestWYZP – GuestWYVF, freechess.org, 2018.

5.Be2 Qe7 6.c4 Nf6 7.0–0 g6 8.d4 e4 9.Nfd2 Bg7 10.d5 0–0 11.Nc3 Nbd7 12.Qc2 Increases the pressure on e4 12...Nc5?? (better 12...c6+=) 13.bc5+– bc5 (13...Rfe8 14.c6 Bc8 15.a4+–) 14.Nce4 Ne4 15.Ne4 (15.Qe4?! Qe4 16.Ne4 Bb2+–) 15...Bb2 (15...Rab8 16.Bg7 Kg7 17.Rab1+–) 16.Qb2 Qe4 17.Qb7 Rfc8 (17...Qc2 18.Rfe1 Rfc8 19.a3+–) 18.Rfc1 h5 (18...a5 19.Rab1+–) 19.Bf3 (19.Rab1 h4+–) 19...Qe5 (19...Qe8 20.Rcb1+–) 20.Qc6 (20.Rab1 a6+–) 20...Qe7 (20...Qe8 21.Qa6+–) 21.Rab1 h4 (21...Qe8 22.Qe8 Re8 23.Rb7+–) 22.h3 (22.Rb7 Qe8+–) 22...f5 (22...Qe8 23.Qa6+–) 23.Qa4 Qf7 (23...Qe8 24.Qa5+–) 24.Qc2 (24.Rb7 a6+–) 24...Re8 25.e4 (25.Rb7 Reb8 26.Qb3 Re8+–) 25...fe4 26.Be4 Kg7 27.Qc3 (27.Re1 Qf6+–) 27...Kh6 (27...Qf6 28.Qd3+–) 28.Qe3 (28.Re1 Rab8+–) 28...Kg7 29.Qc3 Kh6 30.Bf3 Re5 (30...a6 31.Qa5+–) 31.Re1 Re1 32.Re1 Re8 33.Qd2 Kg7 34.Re8 (34.Rb1 Qf6+–) 34...Qe8 35.Bg4 Qe5 36.Be6 Qf6 37.Kh2 g5 38.a4 Kh6 39.Qe2 Qe5 (39...Kg7 40.a5+–) 40.g3 (better 40.Qe5 de5 41.Bf5+–) 40...Qe2 (40...Qe2 41.gh4 Qf2 42.Kh1 Kh5 43.Bg4 Kh4 44.Be6 Kg3 45.a5 Qe1) 0–1. GuestPSGS – guestsms, freechess.org, 2017.

5.Be2 Qe7 6.c4 g6 7.d4 e4 8.Nfd2 Nc6 (better 8...Nf6!?+=) 9.b5 Nd8 10.d5 Nf6 11.Ne4! Bg7 (11...Ne4 Exploits the pin 12.Bh8) 12.Nbd2 0–0 13.Nf6 Bf6 14.Bf6 Qf6 15.a4 a6 16.0–0 Qg5 (16...Re8 17.ba6 Ba6 18.a5+–) 17.a5 ba5 18.b6 (18.Ra5!? ab5 19.Ra8 Ba8+–) 18...cb6+– 19.Qb1 b5 20.Ra5 bc4 (20...Ne6!?+–) 21.Nc4+– Bd5? (better 21...Qe7+–) 22.Bf3!! Nc6 (22...Bf3 A pinning theme 23.Rg5) 23.Rd5 Qf6 (23...Ne5 24.Be2 Qe7+–) 24.Rd6 (24.Rd6 Qf5 25.Qf5 gf5 26.Bc6+–) 1–0. Vendelo – Detlev, internet, 2020.

5.Be2 g5 6.h3 Bg7 (6...f5 7.d4 Nd7 8.Bb5+=) 7.c4 (7.d4 e4 8.Nfd2 Nf6+=) 7...Nc6 (7...h5 8.d4=) 8.b5+= Nce7 (8...Na5 9.d4+=) 9.Qc2 (9.Ng5 Bg2 10.Rg1 Bb7+–) 9...h6 (9...a6 10.Ng5 ab5 11.cb5+–) 10.d3 (10.d4 ed4 11.ed4 Nf6+=) 10...Nf5 (10...Nf6 11.d4+=) 11.Nbd2 (11.d4 e4 12.Nfd2 Nf6+–) 11...Qd7 12.0–0 Nf6 13.Ne4 Nh5 (13...Ne4!? 14.de4 Ne7+=) 14.g4+– Be4 (better 14...Nf6!? 15.Nf6 Bf6+–) 15.de4+– (15.gh5 Bb7=+) 15...Nhg3 16.ef5 Nf1 17.Bf1 0–0–0 (17...h5 18.Bg2 0–0–0 19.Qe4+–) 18.Qa4 (better 18.Qe4!? d5 19.Qd5 Qd5 20.cd5 Rd5+–) 18...Kb8 19.Bg2 Bf6 20.Nd2 h5 21.Bc6 (21.Ne4!? Bg7 22.Qa6 d5+–) 21...Qc8 22.Ne4 Be7 (22...Rh6 23.c5! hg4 24.Nd6 cd6 25.cb6+–) 23.f6 Bf8? (23...Bf6 24.Nf6 hg4 25.hg4+–) 24.Qa6 (better 24.Ng5 Rd7 25.c5 Rg8 26.Bd7 Qd7+–) 24...Qa6 25.ba6 hg4 26.hg4 (26.Ng5 Rc8 27.hg4 Rg8 28.Nf7 Rg4 29.Kf1 Rc4+–) 26...Rh4 (26...Bh6 27.a4+–) 27.f3 Bh6 28.Kg2 (28.Bc3 Rh8+–) 28...Rh8 29.Rh1 (29.Bc3!? Bf8 30.Ng5 Rh2 31.Kg1 R8h6+–) 29...Rh1 30.Kh1 Bg7 (30...Kc8 31.Kg2+–) 31.Kg2 Bh6 32.Bd5 Rh7 33.Bc3 (33.a4 Kc8+–) 33...Kc8 34.Bc6 Kd8 35.Bb2 (35.a4 Kc8+–) 35...Rh8 (35...Kc8 36.Nc3 Kb8 37.Be4+–) 36.Nc3 Kc8 37.Nd5 (37.Bb7 Kb8 38.Nd5 c5+–) 37...Bf8 38.Ne7 (38.Ba4 Kb8+–) 38...Kd8 39.Nd5 Rh6?? (39...Kc8 40.e4 Rh7+–) 40.Ba4 Rg6 (40...c5 41.Nb6! Rf6 42.Nd7+–) 41.Bc2 (41.Nb4 Kc8+–) 41...Rh6 42.Bf5 (42.Nb4 Kd7+–) 42...c6 43.Nb4 Kc7 44.f4! gf4 (44...ef4 45.ef4 Combination; 44...gf4 45.ef4 Combination) 45.ef4 Rf6 (45...ef4 46.Be4 d5 47.Be5 Bd6 48.Bd6 Kd6 49.cd5 cd5 50.Nd5+–) 46.fe5 Rh6 47.Nd3 (47.Bc1 Rh8 48.Bf4 Rg8+–) 47...de5 48.Be5 (48.Ne5 Rd6 49.Bc1 f6+–) 48...Bd6+– 49.Bd6 (49.a3 Be5 50.Ne5 f6+–) 49...Rd6 50.Kf3 Rd4 51.Ne5 (better 51.g5 Kd6 52.Be4+–) 51...Rd1?? (better 51...f6 52.Ng6 Rc4=) 52.Nf7+– Rf1 53.Ke3 (53.Ke4 Rc1+–) 53...Ra1 (53...c5 54.Ke4 Re1 55.Kd5 Rd1 56.Ke6+–) 54.g5 Ra2 (54...b5+–) 55.g6 Rg2 (55...Ra1 56.Kf2 Ra5 57.Bb1+–) 56.Kf4 (better 56.Kf3 Rg1 57.Kf2 Rg6 58.Bg6+–) 56...b5 (56...Rf2 57.Kg5 Re2+–) 57.Bg4 Rf2 58.Ke3 (better 58.Bf3 Rc2 59.cb5 Rc4 60.Be4+–) 58...Rf6 59.Bh5 b4 (59...Rf1 60.Ng5 Rg1 61.Kf4 Rf1 62.Bf3+–) 60.g7 (60.Ng5 Rg6 61.Bg6 Kb6+–) 60...Re6 61.Kd3 Re8 62.Nh6 Rd8 63.Kc2 ½–½. GuestRJHC – GuestSTDZ, freechess.org, 2016.

5.Be2 h6 6.c4 a6 7.a4 (7.0–0 e4 8.Nd4 c5+=) 7...Nd7 8.0–0 g5 (8...e4 9.Ne1+=) 9.d3 Bg7 10.Nbd2 Ne7 11.h4 (11.d4!?+=) 11...g4 12.Nh2 h5 13.e4 Ng6 14.g3 Bc8 15.f4 (better 15.Bc3!?=) 15...ef4–/+ 16.Bg7 Rg8 17.Bh6 (better 17.Bg4 hg4 18.h5 fg3 19.Ng4 Rg7 20.hg6 Rg6 21.Qf3–+) 17...f3?? (better 17...fg3 18.Ng4 Qh4–+) 18.Ndf3 gf3 19.Rf3 (19.Nf3 Nh4 20.Bf4 a5+=) 19...Nde5 (better 19...Nh4 20.Rf1 Rg3 21.Kh1 Ne5–/+) 20.Rf7?? (better 20.Re3 Nh4 21.Qf1= (21.Bh5? Qf6–+)) 20...Kf7 (better 20...Nf7 21.Be3 Nge5–+) 21.Bh5 Ke8 22.d4 Nc4?? (better 22...Nf7!? 23.Be3 Qe7–+) 23.Qe2 (23.Bg5 Qd7 24.Qc2=) 23...Be6–/+ 24.d5 Nce5 (24...Qf6 25.Rc1 b5 26.de6 Qe6 27.Qg4=) 25.de6 Qe7 26.Bg5 Qe6 27.Rf1 (27.Ng4 Ng4 28.Qg4 Qg4 29.Bg4 Ne5=) 27...Rf8 (27...Qb3!?–/+) 28.Rf8 Kf8 29.Qf2 Kg7 30.Qd2 (30.Qf5 Re8=) 30...Rh8 (30...Qb3 31.Nf1 Qa4 32.Ne3–/+) 31.Bd1 Kf7 (31...Nf7 32.Qc3 Qe5=) 32.Ng4? (better 32.h5 Nf8 33.Qc3=) 32...Ng4–+ 33.Bg4?? (better 33.Qc3 Ke8 34.Qc6 Kf8 35.Qc7–+) 33...Qg4 34.Qf4 (34.Qc3 Qe4 35.Qc7 Ke6 36.Qb6 Ne5 37.Qa6 Nf3 38.Kf2 Ng5–+) 34...Qf4 (34...Nf4 35.Bf4 Rh4 36.Kf2 Rh2 37.Ke3 Re2 38.Kd3 Qf3 39.Be3 Re3 40.Kd2 Re2 41.Kc1 Qf1) 35.gf4 Re8 36.h5 Nh8 37.Kg2 (37.e5 de5 38.Kf2 c5–+) 37...Re4 0–1. GuestRHYY – GuestXCMS, freechess.org, 2017.

5.d4 e4

6.Nfd2 d5

7.Be2 Bb4 8.c4 Nf6 9.0–0 0–0 10.f3 dc4 11.Nc4 ef3 12.Bf3 Bf3 13.Rf3 Qd5 14.Qb3 Ne4 15.a3 Be7 16.Nc3 Qe6 17.d5 Qg6 18.Ne5 Qh5 19.Ne4 Bg5 20.Ng3 Qh6 21.Ng4 Qd6 22.e4 Nd7 23.a4 c5 24.dc6 Qc6 25.Ne5 Qb7 26.Nd7 Qd7 27.Nf5 Rad8 28.h4 Bd2 0–1. aniabielak – rafbol1948, kurnik, 2012.

5.Be2 Nd7

6.0–0 Be7 7.c4 Ngf6 8.Qc2 0–0 9.Nc3 a6 10.d4 Re8 11.de5 Ne5 12.Ne5 de5 13.Rfd1 Qc8 14.a3 c5 15.b5 ab5 16.Nb5 Ba6? (better is 16...Qc6 17.Bf3 e4=) 17.Be5+– Bb5 18.cb5 Ra5 19.Qb2 Qf5 20.Bf3 Qg6 21.Bc6 Rf8? (better is 21...Rc8+–) 22.Bc7 Ng4 23.Bb6 Bf6 24.Qb1 Ba1 25.Qg6 (25.Qa1?! Rb5 26.Bb5 Qb6+/–) 25...hg6 26.Ba5 Ra8 (26...Bb2+–) 27.Ba8 1–0. donaldzikzpo (1660) – zruby, kurnik, 2012.

6.0–0 f5 7.d3 Ngf6 8.h3 Be7 9.c4 0–0 10.Nbd2 e4 11.de4 fe4 12.Nh2 d5 13.Qb3 dc4 14.Qc4 Bd5 15.Qc2 Bb4 16.Bf6 Nf6 17.Bc4 Qd6 18.Ne4 Ne4 19.Qe4 Bc4 20.Qc4 Kh8 21.Rfd1 Qe7 22.Rab1 Bd6 23.Nf3 Rf7 24.a4 Raf8 25.Qg4 Rf6 26.Qh4 Qf7 27.Ng5 Qg6 0–1. joaquimbage – 07janowski, kurnik, 2012.

6.0–0 g6 7.c4 Bg7 8.Qb3 Ne7 9.Ng5 0–0 10.Nc3 Nf5 11.Bf3 (11.Nge4 Nh4 12.f3 f5=) 11...c6 (better is 11...d5!? 12.Nh3 dc4 13.Qc4 Bf3 14.gf3 c5–/+) 12.Nge4= Qe7 13.Rad1 Nh4 14.Be2 Kh8 15.d4 f5 16.Ng3 f4 17.Nge4 ed4 18.ed4 f3 19.Bf3 Nf3 20.gf3 Rf3 21.Rfe1 Qh4 22.Ng3 Raf8 23.Nce4?? Rb3–+ (23...Rb3 24.ab3 d5–+) 0–1. elsh1403 – duszabiskupa, kurnik, 2011.

6.d3 c6 7.Nbd2 Qc7 8.0–0 0–0–0 (8...d5!?=) 9.Rc1 h5 10.c4 h4 11.h3 f6 12.Qa4 g5 (12...Kb8!?+–) 13.Qa7+– g4 14.Nh2 (14.hg4!? h3 15.gh3 Rh3 16.e4+–) 14...gh3+– 15.gh3 Nh6 16.Ng4 Rg8 17.Kh1?? (17.Kh2 Qb8 18.Qb8 Kb8 19.Nh6 Bh6+–) 17...Ng4 (better 17...c5!? 18.Kh2 f5–/+) 18.Bg4= f5 (better 18...c5 19.Kh2 f5+=) 19.Be2?? (19.Bf3 Be7+–) 19...Nf6 (better 19...c5 20.Qb7 Kb7 21.Bf3 Kb8–+) 20.c5!+– b5 (20...bc5 21.Nc4 Decoy; 20...dc5 21.Nc4 Combination) 21.a4 (better 21.Nf3+–) 21...Nh5?? Black plans f4 (21...Kd7 22.a5 Ra8 23.cd6 c5 (worse 23...Ra7 24.dc7 Bb4 25.Nf3+–) 24.e4 Bd6–/+ (24...Ra7? 25.dc7 fe4 26.de4+–)) 22.ab5 (22.Bh5 Kd7 23.a5 Ra8+–) 22...f4? (22...cb5 23.c6 Bc6 24.Rc6 Qc6 25.Bf3+–) 23.Bh5 (better 23.Ne4 d5 24.b6+–) 23...Qg7 (23...cb5 24.c6! Bc6 25.Rc6 Qc6 26.Bf3 d5+–) 24.Rg1 Qh7 25.Bg4 (better 25.Rg8 Qg8 26.e4 Rd7 27.bc6 Bc6+–) 25...Kc7 (25...Rg4 26.Rg4 Qd3 27.cd6 Rd6+–) 26.b6 1–0. alessandrocarvalhaes (1860) – MOTOR10 (1800), lichess.org, 2019.

5.Be2 Be7

6.0–0 a6 7.c4 Bf6 8.d4 Nd7 9.Qc2 Ne7 10.d5 Ng6 11.Nfd2 c6 12.Ne4 Qe7 (12...Be7 13.dc6 Bc6 14.Rd1+=) 13.Rd1 (better is 13.dc6 Bc6 14.Rd1+/–) 13...h5?? (13...cd5!? 14.cd5 Rc8+=) 14.Nbd2 (better is 14.dc6 Bc6 15.Nd6 Kf8 16.b5 Bg2 17.Kg2+–) 14...cd5 (better is 14...Rc8 15.dc6 Rc6+/–) 15.Nf6?? (better is 15.cd5 b5 16.a4+– (16.Nf6?! Nf6 17.e4 Nf4+=)) 15...Nf6+= (worse is 15...gf6 16.cd5 Bd5 17.Nc4 Bc4 18.Qc4+/–; 15...Qf6?! 16.cd5 Bd5 17.Nf3 Bf3 18.Bf3+=) 16.Qb3 Nh4 (better is 16...0–0+=) 17.Nf3 (better is 17.c5=) 17...dc4 18.Qc4 Bf3 (18...Nf3 19.gf3 Rc8 20.Qb3–/+) 19.Bf3 (19.gf3!? Nd7 20.f4=) 19...Nf3–/+ 20.gf3 0–0 21.Qh4 (21.Qc6 d5+=) 21...Kh7 (21...Rfc8 22.Rd2–/+) 22.Kh1 Qe6 23.Rg1 Qf5 24.Rg3 g6 25.Rag1 Qe6 26.Bc3 (26.f4 Rac8 (26...Qa2? 27.Qf6 Rg8 28.f5 Qd5 29.f3+–) 27.fe5 de5–/+) 26...Nd5 (26...Rfc8 27.Be1–+) 27.Be1 (27.Bd2 Rfc8 28.e4 Nf6–/+) 27...Rac8 28.Rg5 Ne7 29.Qe4 Rc4 (29...Qa2 30.Rh5 Kg7 31.Qh4=) 30.Qb1 (30.Rh5 Kg7 31.Qd3 Rfc8–/+) 30...Qh3 31.R1g3 (31.R5g3 Qc8–+) 31...Qf1 32.Rg1 Qe2 33.Rh5 Kg7 34.Rh3 Nf5?? (better is 34...Rh8 35.f4 Rh3–+) 35.Qf5+– Qa2?? (35...Rc1 36.Rhg3 Ra8 37.Rg6 Kf8+–) 36.Qd7 (36.Rhg3 Rg4 37.Rg4 Qe6 38.Qe6 fe6 39.Rg6 Kf7 40.Rg7 Ke8+–) 36...Qc2 (36...Rc1 37.Rhg3 Qe6 38.Qe6 fe6 39.Rg6 Kh7 40.Re6+–) 37.Qd6 (better is 37.e4 Re4 38.fe4 Qe4 39.f3+–) 37...Qf5 38.Rhg3 Rh4 (38...Qf6 39.Qd7 Kh8+–) 39.Qb6 (39.Bc3 Re8 40.f4+– (40.Qb6 Reh8 41.R3g2 Qh5 42.Rg6 fg6 43.Qc7 Kg8 44.Qd8 Kh7 45.Qe7 Kh6 46.Qe5 Qf3 47.Rg2 Qd1 48.Be1 Qd8+/–)) 39...Rfh8= 40.R1g2 Qb1 The isolani on b4 becomes a target 41.Rg6 fg6 42.Qc7 Kf6 43.Qc3 Qa2 (better is 43...R4h5!?=) 44.f4 (44.Qc6 Ke7 45.Qc7 Ke8 46.Qe5 Kf7 47.Qc7 Ke8 48.Qc6 Ke7 49.Qg6 Qd5 50.Qa6 Qf3+–) 44...Qd5 45.Qe5 Qe5 46.fe5 Ke5? (better is 46...Kf7+/–) 47.f4+– Ke4 48.Bh4 Rh4 49.Rg6 Ke3 50.Ra6 Rf4 51.Ra3 (51.Re6 Kf3 52.b5 Rb4 53.Rf6 Kg4+–) 51...Kf2? (better is 51...Kd2+–) 52.Rb3 Rc4 53.Rb1 Rc8 (53...Rc6 54.b5 Rb6 55.Rb3+–) 54.b5 Kf3 55.b6 Rb8 56.b7 Ke4 57.h4 Kf4 58.Rb5 Kg4 59.h5 Kg3 60.h6 Kg4 61.h7 Kg3 (61...Kf3 62.Kg1+–) 62.Kg1 (better is 62.Rg5 Kf3+–) 62...Kf3 63.h8Q! Rh8 (63...Rh8 64.b8Q Decoy) 64.b8Q Rb8 65.Rb8 Ke3 66.Rd8 Kf3 67.Re8 Kf4 68.Kf2 Kf5 69.Kf3 Kf6 70.Kf4 Kf7 71.Re1 (71.Re3 Kf6 72.Re5 Kg6 73.Rf5 Kh7 74.Kg5 Kg7 75.Rf4 Kh7 76.Kf6 Kg8 77.Rh4 Kf8 78.Rh8) 71...Kf6 (71...Kg6 72.Re6 Kg7 73.Kf5 Kf7 74.Re4 Kg7 75.Re7 Kf8 76.Kf6 Kg8 77.Re8 Kh7 78.Rf8 Kh6 79.Rh8) 72.Re5 Kf7 (72...Kg6 73.Rf5 Kh6 74.Rf6 Kh7 75.Kg5 Kg7 76.Rf5 Kh8 77.Rf7 Kg8 78.Kg6 Kh8 79.Rf8) 73.Kf5 Kf8 (73...Kg7 74.Re7 Kf8 75.Kf6 Kg8 76.Re8 Kh7 77.Rd8 Kh6 78.Rh8) 74.Kf6 (74.Kg6 Kg8 75.Re8) 74...Kg8 75.Rd5 (75.Rh5 Kf8 76.Rh8) 75...Kh7 76.Rg5 (76.Rd8 Kh6 77.Rh8) 76...Kh8 (76...Kh6 77.Re5 Kh7 78.Re8 Kh6 79.Rh8) 77.Kf7 Kh7 78.Rh5 1–0. mikebaldini (1645) – roel_soto_12, gameknot.com, 2015.

6.0–0 Nd7 7.d4 e4 8.Nfd2 d5 9.c4 (9.a3 a5 10.b5 Ngf6=) 9...Bb4=+ 10.Qb3 Bd2 11.Nd2 Ndf6 (11...Ngf6 12.Ba3=) 12.cd5 (12.Rfc1 Ne7=) 12...Bd5=+ 13.Qa4 (13.Qc2 c6=+) 13...Qd7 14.Qc2 Ne7 15.Rfc1 c6 16.a4 0–0 17.a5 Kh8 (17...Rfb8 18.Nc4 Bc4 19.Bc4=+) 18.Ba3 Nfg8 (better 18...Rfb8=+) 19.Ne4+– f5 20.Nc3 Rf6 (better 20...Be6!?+–) 21.Be7+– Ne7 22.ab6 Rg6 (22...Qb7 23.Ba6 Qb6 24.Rcb1+–) 23.Nd5 (23.Ra7 Ra7 24.ba7 Qa7 25.Nd5 Nd5 26.Qf5 Qb8+–) 23...Qd5 24.g3 Rb8 (24...a5 25.Qc5 Rd6 26.b7+–) 25.ba7 (25.ba7 Ra8 26.Rcb1+–) 1–0. DEFFM – GuestLBYT, freechess.org, 2018.

6.0–0 f5 7.d3 Nf6 8.Nbd2 0–0 9.Ng5 Qd7 10.d4 (better 10.c4=) 10...Ne4?? (10...Nd5 11.Nh3=+) 11.Bc4?? (better 11.Nde4 fe4 12.Bg4+–) 11...d5–/+ 12.Nge4 dc4 13.Nc3 ed4 14.ed4 Qd4 15.Nb5? (15.a3 Bg5 16.Ndb1 c5–/+) 15...Qd7?? (better 15...Qb2!? 16.Nc7 Qb4 17.Na8 Ba8 18.Rb1–+) 16.a4 (16.Qe2 Rf7 (16...Qb5?! 17.Qe7 Qd7 18.Rfe1=) 17.Nd4 Nc6 18.Qc4 Bb4–/+) 16...Bb4 (16...a6 17.Nd4–+) 17.c3 (17.Nc4!? Qc6 18.Ne3–/+) 17...Bc5 18.Nc4 Qc6 19.Ne3?? (better 19.Qf3 Qf3 20.gf3–+) 19...Be3 20.Qb3 (20.Qf3 Qf3 21.gf3–+) 20…Kh8 (20...Kh8 21.Qg8 Kg8 22.fe3 Qg2) 0–1. alessandrocarvalhaes (1845) – ilzam (1725), lichess.org, 2019.

6.a3 Nf6 7.0–0 Nbd7 8.c4 0–0 9.d3 a6 10.Nbd2 b5 11.cb5 (11.Rc1 c5=) 11...ab5 12.d4 e4 13.Ne1 d5 (13...c6 14.Qc2 d5 15.f3=) 14.Nc2 (better is 14.Bb5!? Bd6 15.f3+=) 14...c6 15.f3 ef3 16.Nf3 Bd6 17.Bd3 Qc7 18.h3 Rae8 (18...Nb6 19.Nd2 Na4 20.Rb1+=) 19.Re1 (19.Nd2 Bc8=) 19...Ne4 20.Qc1 Ndf6 21.Nd2 (21.Ne5!?+=) 21...Bh2–/+ 22.Kf1 Ng3 23.Kf2 Nfe4 24.Be4 Ne4 25.Ne4 Re4 26.Qd1 Bg3–+ 27.Kf1 Be1 28.Qe1 Rfe8 29.Bc1 Bc8 30.Kg1 Qd6 31.Bd2 Qg6 32.Qe2 Bh3 33.Rf1 Bg4 34.Qf2 R8e6 35.Ne1 Rf6 36.Qg3 Rf1 37.Kf1 Qf5 38.Qf2 Qf2 39.Kf2 h5 40.Nd3 f6 41.Nc5 Re7 42.a4 ba4 43.Na4 Kf7 44.Nc5 Ra7 45.Ke1 Ra2 46.Nd3 Ra1 47.Kf2 Rd1 (47...Rd1 48.Nc5 Rd2 49.Kf1 Re2–+) 0–1. Fournier,Frederic (1980) – Neno47 (1825), Active (5/0), 2005.

5.Be2 Ne7

6.0–0 Ng6

7.c4 Be7 8.d4 Nd7 9.de5 Nge5 10.Nd4 0–0 11.Bf3 (11.f4!? Ng6 12.Bf3 Bf3 13.Qf3+= (worse is 13.gf3 c5 14.Nf5 Bf6+=)) 11...Nf3 (11...Nc4? 12.Bb7 Nb2 13.Qc2+–) 12.Nf3 f5 13.Nd4 Ne5 (better is 13...Qe8!?=) 14.Ne6+/– Qd7 15.Nf8 Rf8 16.Be5 Qc6 17.Qd5 Qd5 18.cd5 de5 19.Nc3 Bb4 20.Rac1 Rc8 21.Nb5 Bc5 22.Na7 Rd8 23.Rfd1 Bd5? (better is 23...Rd5 24.Nb5 f4 25.ef4 ef4 26.Nc7 Rg5 27.Rd8 Kf7 28.Rd7 Kg8=) 24.Nc6!+– Rd6? 25.Ne5 c6?? 26.Nc6!+– Rg6? 27.Ne5 Rg2 28.Kf1 Be4 29.Rd8 Bf8 30.Rcc8 h6 31.Rf8 Kh7 32.Rh8 1–0. elsh1403 (1610) – basrideliu (1615), kurnik, 2011.

7.c4 Be7 8.d4 f6 9.Nc3 0–0 10.Qb3 Kh8 11.Nd2 Nd7 12.Bf3 c6 13.b5 Nb8 14.a4 Nh4 15.Be4 f5 16.Bc2 cb5 17.ab5 Bg2 (17...Ng2?! 18.Nd5 Nh4 19.de5=) 18.Rfe1 Bb7 19.d5 Nd7 20.Ne2 Nc5 21.Qc3 Qe8 22.Ng3 Qg6 23.f4 Qg4 24.fe5 Ne4 25.Be4+= fe4 26.e6 Bf6 27.Qc2 e4 becomes the focus of attention 27...Bb2 28.Qb2 Nf3 29.Nf3 ef3 30.Rf1 Qc4 31.Nh5?? Qg4–+ 32.Ng3 Bd5 33.Qd4 Be6 34.Qd6 Rad8 35.Qe5 Rd2 36.Rf2 Rf2 37.Kf2 Qc4 38.Qb2 Rd8 39.Ra2?? Rd1 40.Qc2?? Qa2–+ 41.Qa2 Ba2 42.Kf3 Rd2 43.Ne4 Rh2 44.Kg3 Re2 45.Kf3 Re3! 46.Ke3 Bc4 47.Nd6 (47.Nd6 Bb5! 48.Nb5–+). elsh1403 – basrideliu (1665), kurnik, 2011.

7.d4 e4 8.Nfd2 Be7 9.c4 Bf6 (better is 9...0–0!?+=) 10.Nc3+– Qe7 11.Qc2 0–0 12.Nce4 Nh4 13.g3 Ng6 14.Bf3 Nc6 15.b5 Na5 16.Bc3 Rab8 17.Ba5 ba5 18.Nf6 Qf6 19.Bb7 Rb7 20.Qa4 Qg5 21.Qa5 h5 22.Qa6 Rfb8 23.Qc6 h4 24.Qg2 Qf5 25.h3 Qd3 26.Rfd1 a6 27.a4 ab5 28.ab5 hg3 29.Qg3 c6? 30.bc6 Rb2 31.Qd6 Rf8 32.c7 Rd2 33.Rd2 Qd2 34.Qf8! Nf8 35.c8Q Qc3 36.Ra8 Qe1 37.Kg2 Kh7 38.Qf8 f6 39.Qh8 Kg6 40.Qe8 Kh7 41.Qh5# 1–0. iwan19999 (1620) – janusz50, kurnik, 2012.

7.d4 e4 8.Nfd2 f5 9.c4 Qg5 10.f4 ef3 11.Nf3 Bf3 (better is 11...Qe3!? 12.Kh1 d5=) 12.Bf3+/– c6 13.e4 f4 14.e5 (14.b5!? Kd8 15.a4+–) 14...de5+= 15.de5 (better is 15.Qa4 Kf7 16.c5 ed4 17.cb6+– (worse is 17.Bd4 bc5 18.Qb3 Ke8 19.Re1 Kd8+=)) 15...Bb4+= 16.Nc3 0–0 17.Ne4 Qe7 18.Qb3 Bc5 19.Kh1 Ne5 20.Rae1 (better is 20.Nc5!? Nf3 21.Qf3 bc5 22.Rae1=) 20...Nf3–/+ 21.Rf3 Qf7 (21...Be3 22.Ng3 Qd8–/+ (22...fg3 23.c5 Qf7 24.Rf7 Rf7 25.Re3+–)) 22.Nc5= bc5 23.Ref1 g5 24.Qc3 Qf5?? (better is 24...Qg6=) 25.Qg7 1–0. elsh1403 – janusz50, kurnik, 2011.

7.h3 Be7 8.d3 Nd7 9.Nbd2 0–0 10.e4 f5 11.c4 f4 12.d4 h6 13.d5 c6 14.b5 c5 15.a4 a5 16.ba6 Ba6 17.a5 ba5 18.Ra5 Qa5 19.Nb3 Qc7 20.Bc3 Nh4 21.Nbd2 Nf3 22.Nf3 Kh7 23.Bd3 g5 24.Nh2 Nf6 25.Ba1 Bc8 26.f3 Rg8 27.Be2 Nh5 28.Bc3 Ra2 29.Ng4 Bg4 30.fg4 Ng3 31.Rf2 Ne2 32.Re2 Re2 33.Qe2 Ra8 34.Qb2 Rb8 35.Qd2 Qb6 36.Kh2 Qb1 37.Qe2 Rb3 38.Ba5 Rb2 39.Qf3 Qe1 0–1. joaquimbage – 07janowski (1695), kurnik, 2012.

5.Be2 f5

6.0–0 Nc6 7.a3 Qd7 8.c4 Nf6 9.h3 Be7 10.Nc3 h6 (10...e4 11.b5 Ne5 12.Nd4=) 11.Rc1 g5 12.Nd5 Nd5 13.cd5 Nd8 14.Bc4 h5 15.Nh2 Nf7 16.f4 gf4 17.ef4 0–0–0 (17...b5 18.Bb3+=) 18.Nf3 (18.Qc2 Rdf8+/–) 18...Rhg8? (18...b5 19.fe5 de5 20.Ne5 Ne5 21.Be5 bc4 22.Rc4+=) 19.Nh2 (19.fe5!? Ne5 20.Ne5 de5 21.Be5+–) 19...e4 (better is 19...b5!? 20.Ba2 Rg7 21.Qh5 Rh8=) 20.Qh5 Rdf8 21.Bd4 Rg3 22.Be3 Rfg8?? 23.Rf2?? c6?? 24.Qf7 Bh4 25.Re2 Qf7–+ 26.dc6 Qg7 27.Bg8 (27.Bg8 Ba6 28.Be6 Kc7 29.Bc4–/+) 1–0. lican – meiasete67, kurnik, 2012.

6.0–0 g6 7.d4 e4 8.Nfd2 d5 9.a3 Nf6 10.c4 Be7 11.Qb3 0–0 12.Nc3 c6 13.Rac1 Nbd7 14.f3 ef3 15.Nf3 Ne4 16.c5 Ndf6 17.Ne5 b5 18.Qd1 a5 19.Qe1 ab4 20.ab4 Nc3 21.Bc3 Ra2 22.Ra1 Qa8 23.Ra2 Qa2 24.Bd3 Ne4 25.Be4 fe4 26.Rf8 Bf8 27.Qf1 Qa8 28.Qf7 Kh8 29.Be1 Qd8 30.Bg3 Bc8 31.Nc6 Qg5 32.Be5 Qe5 33.Ne5 Bh6 34.Qe8 Kg7 35.Qc8 Be3 36.Kf1 Bd4 37.Qe6 e3 38.Qf7 Kh6 39.Ng4 Kh5 40.Ne3 Be3 41.Qf3 Kh6 42.Qe3 g5 43.c6 Kh5 44.c7 h6 45.c8N 1–0. elsh1403 – sadiav, kurnik, 2012.

6.c4 Nd7 7.0–0 g5 8.d4 g4 9.Nfd2 e4 10.d5 Ngf6 11.a4 Qe7 12.Nc3 Bg7 13.Qb3 h5 14.a5 h4 15.ab6 Nb6 16.Nb5 a6 17.Bf6 Bf6 18.Nd4 Bd4 19.ed4 g3 20.fg3 h3? (better is 20...Qg5 21.Rf4 Qg7+/–) 21.Rf5+– hg2 22.Kg2 Bc8 23.Rf4 White intends c5 23...Bh3 24.Kg1 0–0–0 25.c5 Nd7 26.Ba6 Kb8 27.Qa4 dc5 28.bc5 e3 29.Rb1 Nb6 30.Ne4 Rd5 31.cb6 c5 32.Qc6 Rd4 33.Nc5 Rf4 34.Nd7! Qd7 35.Qd7 Bd7 36.gf4 1–0. brother – kestasl, kurnik, 2012.

6.d3 Nf6 7.Nbd2 Nbd7 8.c4 Be7 9.Qb3 (9.Ng5 Qb8+= (9...Bg2? 10.Rg1+–)) 9...h6 (9...a5 10.ba5 Ra5 11.d4=) 10.Rc1 a5 11.a3 c5 12.Bc3 e4 13.de4 Be4 (13...fe4 14.Nh4 cb4 15.ab4+=) 14.Ne4 fe4 15.Nh4 0–0 16.Ng6 Rf7 17.0–0 Kh7 18.Ne7 Qe7 19.Rcd1 (19.ba5 ba5 20.Qb7 Rb8+/–) 19...Nf8 (19...ab4 20.ab4 Ne5 21.Rd2+=) 20.Rd2 Ne6 21.Rfd1 Ne8? (21...ab4 22.ab4 Rd8 23.Qa4+/–) 22.Bh5 (better is 22.Qc2!? Qb7 23.ba5 ba5 24.Rb1+–) 22...g6+/– 23.Qc2 (23.Bg4 ab4 24.ab4 N6c7+/–) 23...Qh4+= 24.Rd6?? (better is 24.Bg6 Kg6 25.f4+=) 24...Nd6–/+ 25.Rd6 (25.Bg6!? Kg6 26.Rd6+=) 25...Qh5–+ 26.Re6 Rd8 27.h3 ab4 28.ab4 cb4 29.Bd4+= Rdf8 30.Qe4+= b3?? 31.g4+– Qg5 32.f4 Rf4 33.ef4 Qf4 34.Qg6 1–0. Munksgaard,Dennis (2020) – Oehmichen,Jan (1850), North Sea Cup, 2008.

6.0–0 Nf6

7.c4 Be7 8.Nc3 0–0 9.h3 h6 10.Qc2 Qd7 11.b5 g5 Black prepares the advance f4 12.d3 f4 13.ef4 gf4 14.a4 (14.d4!? e4 15.Ne1+/–) 14...Kf7 15.Ne4 Ne4 16.de4 Rg8 17.Kh1 a6 (17...Ke8!?+=) 18.Rad1 a5?? (better is 18...Qe6 19.c5! Qg6 20.Bc4 Kf8 21.Bg8 Be4+/–) 19.Ne5!+– (19.Ne5 de5 20.Rd7 Nd7 21.Bh5 Kf8 22.Bg4+–) 1–0. Neumann,Frank – Jokmin,Alex, OP–2012–0–01987, 2012.

7.d4 e4 8.Nfd2 d5 9.a3 Bd6 10.c4 dc4 11.Bc4 c6 12.Nc3 Bh2 13.Kh2 Ng4 14.Kg3 Qg5 15.f4 Qg6 16.Qe2 Ne3 17.Kf2 Ng4 18.Ke1 Nd7 19.Nb3 0–0–0 20.Rc1 e3 21.d5 Ndf6 22.dc6 Bc6 23.Nb5 Kb7 24.Bf6 Qf6 25.N3d4 Rd4 26.Nd4 Qd4 27.Be6 Nf2 28.Bf5 Qf4 29.Rc6 Kc6 30.Qf3 Qf3 31.gf3 g6 32.Be4 Kb5 33.Ke2 Ne4 34.fe4 Rc8 35.Ke3 Rc3 36.Kd4 Ra3 37.Rf7 Rh3 38.Ra7 Kb4 39.e5 Kb5 40.e6 Rh1 41.e7 Re1 42.Kd5 h5 43.Kd6 h4 44.Kd7 h3 45.e8Q Re8 46.Ke8 g5 47.Rh7 g4 48.Kf7 Kc4 49.Kf6 b5 50.Kf5 g3 51.Rh3 g2 52.Rg3 b4 0–1. elsh1403 – tano69 (1730), kurnik, 2012.

7.d4 Bf3 8.Bf3 e4 9.Be2 Be7 10.c4 0–0 11.a4 Nbd7 12.Nc3 a5 13.Qb3 ab4 14.Qb4 Nb8 15.Nb5 Ra5 16.Qb3 Kh8 17.Ba3 Ra8 18.Rac1 Nc6 19.c5 Na5 20.Qa2 dc5 21.dc5 bc5 22.Rfd1 Bd6 23.Bc5 Nb7 24.Bd6 cd6 25.Rc6 d5 26.Nc7 Qd7 27.Bb5 Nd6 28.Qb3 Nb5 29.ab5 Rac8 30.Nd5 Rc6 31.bc6 Qc6 32.Ne7 Qc5 33.Qb7 Qc2 34.Ra1 Ng4 35.Rf1 Qa2 36.h3 Nf6 37.Rb1 Qf7 38.Ra1 h5 39.Ra7 Kh7 40.Qb4 Qe6 0–1. elsh1403 – t0mahawk (1780), kurnik, 2012.

7.Ng5 g6 8.Ne6 Qe7 9.Nf8 Kf8 10.Bc4 Kg7 11.d4 Nbd7 12.de5 Ne5 13.Bb3 Rhe8 14.Nd2 Ne4?? (14...a5!? 15.a3 a4=) 15.Ne4 (better is 15.f4+–) 15...fe4+/– 16.Qg4 Rf8 17.Rad1 Qf6? 18.Qe6?? Qe6= 19.Be6 Rf6 20.Bd5 Bd5 21.Rd5 Raf8 22.c4 Kf7 23.c5?? Ke7 24.cd6 cd6 25.a4 Rf5 26.a5?? Nf3 27.gf3 Rd5 28.fe4 Rd2 29.Bd4–/+ Rb8 30.ab6 ab6 31.Rc1 Rb7 32.Rc6 Attacking the isolated pawn on b6 32...b5 33.Kg2 Ra2 34.Kf3 Kd7 35.Rc1 Rc7 36.Rg1 Rcc2 37.Rg2 Ke6 38.Bb6 Rab2 39.Ba5 Ke5 40.h4 Rc4 41.Rg4 Rcc2 42.Rg2 Ke6 43.h5 gh5–+ 44.Rh2 d5?? 45.ed5+= Kd6 46.Kg3 Kd5 47.Rh5 Kc4 48.Rh2 Rd2 49.Rh4 Kc3 50.f4? Rf2?? 51.Rh7+/– Rg2 52.Kf3 Rbf2 53.Ke4 Re2 0–1. elsh1403 – profix, kurnik, 2011.

7.h3 Be7 8.d4 e4 9.Nh2 0–0 10.c4 d5 11.c5 Ba6 12.Ba6 Na6 13.a3 bc5 14.dc5 c6 15.f4 Nc7 16.Nc3 g6 17.Ne2 Nh5 18.Nd4 Qd7 19.Rf2 Bf6 20.Nf1 Ne6 21.Rb1 Bd4 22.Bd4 a5 23.Qd2 ab4 24.ab4 Ra4 25.Rb3 Rfa8 26.Qc3 Ra1 27.Be5 Ng3 28.Qb2 Nf1 29.Rf1 Rf1 30.Kf1 Qa7 31.b5 Qc5 32.bc6 Qc6 33.Rb8 Rb8 34.Qb8 Kf7 35.Qa7 Ke8 36.Qb8 Kd7 37.Qa7 Kd8 38.Qh7 Qc1 39.Kf2 Qd2 40.Kg3 Qe3 41.Kh2 Nf4 42.Qc7 Ke8 43.Bf4 d4 44.Be3 1–0. horacyad2010 – walmeryt (1695), kurnik, 2012.

5.Be2 Nf6

6.d3 Be7 7.0–0 0–0 8.c4 Nbd7 9.Nfd2 Rb8 (9...d5 10.a3=) 10.Nc3 c5 (10...a6 11.f4=) 11.b5+= d5 12.cd5 Nd5 13.Bf3 N7f6 (better 13...Nc3!? 14.Bc3 a6=) 14.Nd5+– Nd5 15.Be5 Rc8 (15...Bd6 16.Bd6 Qd6 17.Nc4+–) 16.Qb3 Qd7 (16...Re8 17.Nc4+–) 17.Nc4 Nf6 (17...Rfe8 18.Rac1+–) 18.Bb7+– Qb7 19.f3 (19.a4 Rcd8+–) 19...Nd5 (19...Qd5 20.Rad1+–) 20.e4+– Nc7 21.a4 Ne6 22.a5 Rfd8 (22...Nd4!? 23.Qa4 Ra8+–) 23.ab6 ab6 24.Ra6 Qd7 (24...Ra8 25.Rfa1+–) 25.Qb1 (25.Nb6 c4 26.dc4 Bc5 27.Kh1 Bb6 28.Rb6 Qd2+–) 25...Qd3 26.Nb6 Qe3 27.Kh1 Rc7 28.Bc7 Nc7 29.Ra7 Bd6 30.Nc4 Qh6 (30...Qf4 31.g3 Qf6+–) 31.e5 (31.e5 Nb5 32.Qb5+–) 1–0. Janek – AxelG, internet, 2017.

6.d3 Be7 7.Nbd2 Nbd7 8.0–0 0–0 9.a3 Rc8 10.Rb1 1–0. Fournier,Frederic (1775) – neidak, Active, 2007.

6.0–0 Be7

7.a3 0–0 8.d3 Nbd7 9.Nbd2 h6 10.c4 Nh7 11.h3 f5 12.Nh2 Ndf6 13.f4 ef4 14.ef4 Nh5?? (better is 14...d5=) 15.Bh5+– Bf6 16.Bf6 Qf6 17.Bf3 Qd4 18.Kh1 Rae8 19.Bb7 Qd3 20.Bd5 Kh8 21.Ndf3 Qc3 22.Re1 Nf6 23.Re8 Re8 24.Bc6 Re7 25.Bd5 Nh5?? 26.Qc1 Ng3–+ 27.Kg1 Ne2 28.Kf2 Nc1 29.Rc1 Qc1 30.a4 Qb2 31.Kg3 Qb4 32.Nd4 Qc3 33.Ndf3 g5 34.fg5 hg5 35.Nf1 g4! 36.hg4 fg4 37.Kg4 Rg7 38.Kf4 Qf6 39.Ke3 Rg2 40.N1d2 Qh6 41.Kd3 Rg3 42.Ke2 Qf4 43.Kf2 Rf3! 44.Nf3 Qc1 45.Ke2 Qb2 46.Ke3 Qa3 47.Ke4 Qa4 48.Nd4 Qd1 49.Nc6 a5 50.Nd4 a4 51.Nb5 Qc1 52.Kf5 a3 53.Na3 Qa3 54.Ke6 Qe3 55.Kd7 Qc5 56.Kc8 b5 (56...b5 57.cb5 Qd5 58.Kc7 Qc5 59.Kd7 Kg7–+) 0–1. exp2005 – maciek94, kurnik, 2011.

7.a3 0–0 8.Ne1 Nc6 9.c3 Rc8 10.d4 Ba8 11.d5 Nd5 (better is 11...Nb8!? 12.c4 c6=) 12.Qd5+/– Nb4 13.Qb3 Nc6 14.Bf3 Na5 15.Qd1 c6 16.Nd2 d5 17.Nb3 Nc4 (17...Nc4 18.Bc1 e4+=). cogit – ronensimian, kurnik, 2012.

7.c4 a6 8.d4 e4 9.Nfd2 0–0 10.Qc2 Re8 11.a4 (11.d5 c6 12.dc6 Bc6+=) 11...c6 (11...Nc6 12.Ba3=) 12.c5 bc5 13.dc5 d5 14.Nb3 Kh8 15.Na5 Bc8 16.Bd4 Ng8 17.f4 (17.Nd2 Qc7+=) 17...f5 (17...Nh6 18.Qc3 Nf5 19.Be5+=) 18.Nd2 Rf8 19.Qc3 Bf6 20.Ndb3 h6 21.h3 Ra7 22.Bf6 Nf6 23.Nd4 Qc7? (23...Bd7 24.b5+/–) 24.g3 (better is 24.b5 Ra8 25.Nac6 Nc6 26.Nc6+– (26.bc6?! Rb8+/–)) 24...Bd7+= 25.Rf2 Kh7 26.Rg2 Ra8 27.Rf1 Rg8 28.g4 fg4 29.hg4 Qc8 30.g5 White prepares f5 30...Ne8 31.Rh2 Bg4?? 32.f5 Be2+/– 33.Ne2 Qd8?? 34.g6 Kh8 35.Rh6# 1–0. orangutandu – szryszard, kurnik, 2012.

7.d3 0–0 8.Nbd2 Nc6 9.a3 a5 10.b5 Na7 11.c4 c6 12.a4 cb5 13.cb5 Rc8 14.Qb3 Bd5 15.Nc4 Bc4 16.dc4 Ne4 17.Rfd1 Nc5 18.Qc2 g6? (18...e4 19.Nd4 f5 20.Qd2+=) 19.Nd2 (better is 19.Ne5!? Bf6 20.Rd5+–) 19...Qc7+/– 20.Rac1 Rcd8 21.Ne4 Ne4 22.Qe4 Nc8 23.f4 Bf6 24.fe5 de5 25.Ba3 Nd6 26.Qc2 Rfe8 27.c5 bc5 28.Bc5 Nf5 29.e4 Rd1 30.Rd1?? Ne3 31.b6 Qc6 32.Bb5= Qb5? 33.ab5?? Nc2–/+ 34.b7 Nd4 35.Bd6 Nb5 36.b8Q Rb8 37.Bb8 Nc3 38.Rd2 Ne4 39.Ra2 Bd8 40.Be5 f6 41.Bd4 Nd6 42.Kf2 Kf7+= 43.Ke3 Nc4 44.Kd3 Ne5 45.Ke4 Nc6 46.Bc3 Exerts pressure on the isolated pawn 46...Nb4 47.Bb4 ab4 48.Ra7 Be7 49.Rb7 1–0. elsh1403 – ante1, kurnik, 2011.

7.d3 Nbd7 8.Nbd2 Nd5 9.a3 N5f6 10.c4 0–0 11.Qb3 a5 12.Rfd1 a4 13.Qc2 c6 14.d4 e4 (better is 14...Qc7!?+=) 15.Ne4+– Ne4 16.Qe4 Nf6 17.Qc2 Re8 18.Bd3 g6 19.e4 d5 20.e5 (20.cd5 cd5 21.e5 Nd7+–) 20...Nh5 21.g3 dc4 22.Bc4 Ng7 23.Nd2 c5 24.bc5 bc5 25.dc5 Rc8? (25...Qc7 26.Ne4 Be4 27.Qe4 Bc5 28.Bd5+–) 26.Ne4 Be4 27.Qe4 (27.Rd8 Bc2 28.Re8 Ne8+=) 27...Qc7 28.Bd4?? (better is 28.Bb5 Rf8 29.c6+–) 28...Bc5+/– 29.Bc5 Qc5 30.Rac1 Kf8 31.Ba6 Qc1 32.Rc1 Rc1 33.Kg2 Ne6 34.Qa4 1–0. bratek55 (1770) – angelsky1313, kurnik, 2011.

7.d4 ed4 8.Nd4 0–0 9.c4 Nc6 10.b5 Nd4 11.Bd4 Nd7 12.a4 Bf6 13.Nd2 Qe7 14.Bf3 Bf3 15.Qf3 g6 16.Ne4 Bg7 17.Bg7 Kg7 18.Nc3 Nc5 19.Nd5 Qd8 20.Qg4 f5 21.Qg3 Re8 22.h4 Ne4 23.Qf4 Re5 24.f3 Nc5 25.Qg3 Qd7 26.h5 Rf8 27.hg6 hg6 28.f4 Re4 29.Kf2 Ree8 30.Rh1 Ne4 31.Kf3 Ng3 32.Kg3 Rh8 33.Rhe1 c6 34.Nb4 cb5 35.cb5 Qe7 36.Rac1 Qh4 37.Kf3 Qg4 38.Kf2 Re7 39.Nd5 Rd7 40.Nc7 Rh2 41.Rg1 Qh4 42.Kf3 Qh5 43.Kf2 d5 44.Ne6 Kf6 45.Ng5 d4 46.Rc6 1–0. elsh1403 – protlak, kurnik, 2012.

7.d4 ed4 8.Nd4 0–0 9.Bf3 Bf3 10.Nf3 Nbd7 11.c4 h6 12.Nbd2 Nh7 13.Qb3 Bf6 14.Nd4 c5 15.Nc6 Qc7 16.b5 a6 17.a4 ab5 18.cb5 Ng5 19.Rfd1 Ne6 20.Ne4 Bb2 21.Qb2 Nb8 22.Nb8 Rfb8 23.Nd6 Rd8 24.Qe5 Rd7 25.Rd2 Rad8 26.Rad1 Nf8 27.Nf7 Qe5 28.Rd7 Rd7 29.Rd7 Qa1 0–1. elsh1403 – kissmysword (1625), kurnik, 2012.

7.d4 e4 8.Nfd2 0–0 9.c4 c5 10.d5 cb4 11.Qc2 a5 12.Ne4 Ne4 13.Qe4 Nd7 14.Bd3 g6 15.Nd2 Nc5 16.Qd4 f6 17.Bc2 a4 18.Ne4 (18.Rab1 Ra5+/–) 18...Ne4 (better is 18...a3!? 19.Bc1 f5 20.Nc5 bc5=) 19.Qe4+/– (worse is 19.Be4 a3 20.Bd3 ab2 21.Qb2 f5 22.Qb4 Bf6–/+) 19...b3? (better is 19...f5 20.Qf4 Bg5+/–) 20.Qe6?? (better is 20.ab3 f5 21.Qd3+–) 20...Kg7 21.ab3?? ab3?? 22.Bb3 Ra1 23.Ra1 Bc8 24.Qe4 Bf5 25.Qf3 h5 26.Ra7 Qe8 27.Qg3 Rf7 28.Bd1 Bd8 29.Rf7 Qf7 30.Bh5 Kf8? 31.Bg4 Bg4 32.Qg4 f5 33.Qd4 Ke7 34.Qb6 Bb6–+ 35.Kf1 Qf8 36.g3 Ke8 37.Bc3 Bd8 38.Kg2 Bf6 39.Bb4 Be5 40.Ba5 Qe7 41.Bb6 Qb7 42.Bd4 Bd4 43.ed4 Qb3 44.c5 Qd5 45.Kg1 1–0. elsh1403 – odim, kurnik, 2011.

7.d4 e4 8.Ng5 d5 9.c4 0–0 10.cd5 Bd5 (10...Nd5?! 11.Ne4 Bb4 12.a3=; 10...Qd5?! 11.Nh3 Bb4 12.Nc3–/+) 11.Nc3 Bb7 (11...Bb4!? 12.Qc2 Bc3 13.Bc3 Qd6–/+) 12.b5 h6 13.Nh3 Nbd7 14.f3 ef3 15.Bf3 Bf3 16.Rf3 Nh7 17.Qb3 c5? (17...a6 18.Raf1 Ndf6 19.ba6 Ra6 20.Qc4=) 18.Raf1 (better is 18.bc6!? Ndf6 19.d5+–) 18...Ndf6 19.Nf2 cd4 20.ed4 Rc8 21.Nce4 Nd5 22.Ng4 Ng5 23.Ng5 Bg5 24.Ne5 Bf6 25.Nc6 Qd6? 26.Ba3+– Qe6 27.Bf8 Rf8 28.a4 Kh7 29.Rf5 Qe3? 30.Qe3+– Ne3 31.R1f3 Nf5+/– 32.Rf5 Kg6 33.Rd5 Rc8 34.Rd7 a6 35.d5 ab5+/– 36.ab5 Ra8 37.d6 Ra1 38.Kf2 Ra2 39.Kf3 Ra3 40.Kf4 Bg5 41.Ke4 f5 42.Ke5 Bf6= 43.Ke6 Re3 44.Kd5 Rd3 45.Kc4 Rd2 0–1. elsh1403 – madziasax, kurnik, 2011.

5.Be2 g6

6.d4 Nd7 7.0–0 e4 8.Nfd2 Bg7 (8...d5 9.a3+=) 9.a4 (9.c4 Ngf6+=) 9...d5 (9...Ngf6 10.c4+=) 10.c4+– c6 11.b5 c5 (11...Qh4 12.bc6 Bc6 13.cd5 Bd5 14.Nc3+–) 12.cd5+– Bd5 (12...Ngf6!?+–) 13.Nc3+– Ndf6 (13...Be6 14.Nce4 Qe7 15.a5+–) 14.dc5 bc5 15.Nd5 Qd5 16.Ne4! Qe4 (16...Qe4 17.Bf3 Decoy; 16...Ne4 17.Qd5 Double attack (17.Qd5 Discovered attack; 17.Bg7 Pinning; 17.Qd5 Deflection; 17.Qd5 Decoy; 17.Qd5 Overloading)) 17.Bf3 Qb4 18.Ba8 Qb2 (18...Ne7 19.Qd6 0–0 20.Qe7 Qb2 21.Rab1+–) 19.Qd6 Nd7 20.Bc6 Ngf6 (20...Be5 21.Qd7 Kf8 22.Rfb1+–) 21.Rad1 Bf8 (21...Kd8 22.Bd7 Ne4+–) 22.Bd7 Kd8 23.Qb8 (23.Qc6 Qe5 24.Be8 Ke7 25.f4 Qe3 26.Kh1 Qd4 27.Rd4 cd4 28.Qc7 Ke8 29.Re1 Ne4 30.Re4 Be7 31.Qe7) 23...Ke7 24.Qc7 Nd7 25.Rd7 (25.Qd6 Ke8 26.Qd7) 25...Kf6 26.Qf4 Ke6 (26...Kg7 27.Rf7 Kg8 28.Rf8 Kg7 29.Rf7 Kg8 30.Ra7 Qf2 31.Kf2 c4 32.Qf7) 27.Qf7 (27.Qf7 Ke5 28.Qd5 Kf6 29.Rf7) 1–0. Hilbert,Stephan J – Foster,Duncan, FICGS, 2015.

6.0–0 Bg7

7.a3 Nf6 8.c4 Nbd7 9.d4 ed4 10.ed4 0–0 11.Nc3 Ne4 12.Na2 Ndf6 13.d5 c6 14.b5 (better is 14.dc6!? Bc6 15.Nd4+/–) 14...cd5 15.cd5 Nd5 16.Bg7 Kg7 17.Qd4 Nef6 18.Bc4 Rc8 19.Rfc1 Ne7 20.Nb4 Bf3 21.gf3 d5 22.Bb3 Rc1 23.Rc1 Nf5 24.Qa1 Nd4?? 25.Qd4+– Kg8 26.Rd1 Nh5 27.Nc6 Qg5 28.Qg4 Qg4 29.fg4 Nf4 30.Bd5 Ne2 31.Kh1 Nc3 32.Rd3 Nb5 33.a4 Nc7 34.Ba2 Ne6 35.Ne7 Kg7 36.Rd7 Nc5 37.Ra7 Nd3 38.Kg2 Nc1 39.Bd5 Nd3 40.Nc6 White plans a5 40...Nf4+= 41.Kg3 Nd5 42.f4 Nc3 43.a5 ba5 44.Ra5 Ne2 (44...Ne2 45.Kf3 Ng1 46.Kf2 Nh3 47.Kg3 Rc8+=). cogit – peladeiro, kurnik, 2012.

7.d3 Nf6 8.Nbd2 h5 9.c4 h4 10.h3 Nbd7 11.Qc2 Qe7 Black prepares e4 12.a4 0–0 13.a5 e4 14.d4?? (better is 14.Nh4 ed3 15.Bd3 ba5 16.Ra5+/–) 14...ef3–/+ 15.Bf3 Bf3 16.Nf3 Nh7 17.e4 Ndf6 18.e5 de5 19.Ne5 Nh5 (19...Qb4? 20.Ba3 Qa5 21.Bf8 Qa1 22.Ra1 Nf8 23.c5 bc5 24.Qc5+–) 20.Rfe1 Be5 21.Re5 Qd7 22.d5 Rfe8 23.Rae1 Re5 24.Re5 Re8 25.Re8 Qe8 26.Qc3 f6 27.ab6 ab6 28.c5 Nf4 29.Qf3?? g5 30.d6 cd6 31.cb6 Qe1 32.Kh2 Qb4 33.Qa8+– Kg7 34.Bf6?? Nf6–+ 35.b7 Qe4 36.b8Q+– Qe5 37.Qh8 Kg6= 38.Qf3?? Ne6 39.g3 hg3 40.Qg3?? Nf4 41.h4 Qe6?? 42.Qg5 Kf7 43.Qgg7# 1–0. ejdrzej (1710) – dudepl, kurnik, 2012.

7.d4 Nd7 8.c4 ed4 9.ed4 Ne7 10.Nbd2 0–0 11.Qb3 c5 12.a3 Nf5 13.d5 Bb2 14.Qb2 f6 15.Rae1 Ne5 16.Ne5 fe5 17.f4 (better is 17.bc5 dc5 18.Qe5+–) 17...Ne3= 18.Rf3 ef4 19.Ne4 Qh4 20.g3 fg3 21.Ng3? (better is 21.Nf6 Rf6 22.hg3–/+) 21...Rf3–+ (21...Nc4 22.Rf8 Rf8 23.Bc4 cb4 24.ab4+/–) 22.Bf3 Re8 23.Qc3 Qd4 24.Qd4 cd4 25.Kf2 Bc8?? 26.Ne4 Rf8–/+ 27.Ke2 Nc2?? 28.Rf1 Na3 29.Nd6 Bd7 30.Kd3 Bg4?? 31.Be4?? Rf1–+ 32.Kd4 Rd1 33.Ke5 Re1 34.Kf4 Nc2 35.Kg4? Nb4–+ 36.Kf4 a5 37.Nb5? a4 38.d6 Rd1 39.Bd5? Nd5 40.cd5 (40.cd5 Rd5 41.Nc3 Rd6 42.Ke5–+). elsh1403 – someone005 (1645), kurnik, 2011.

7.d4 Nd7 8.c4 Ne7 9.Nbd2 0–0 10.Qc2 Nf5 11.Rfd1 Qe7 12.d5 a6 13.Ne4 Rad8 14.Rac1 c6 15.dc6 Bc6 16.b5 Bb7 (16...ab5 17.cb5 Bb7 18.g4+=) 17.Ba3 (17.ba6!? Be4 18.Qe4+/–) 17...Nc5= 18.Nc5 bc5 19.Nd2 (19.Bb2 Nh4+=) 19...f6 (19...ab5!? 20.cb5 Ra8+=) 20.Bf3 Bc8 (20...ab5 21.cb5 Bf3 22.Nf3=) 21.Bd5 Kh8 22.Ne4 h6 23.Rd2 Kh7 24.Rcd1 Bh8 25.Ng3 Be6? 26.Be6+– Qe6 27.Nf5 Qf5 28.Qf5 gf5 29.Rd6 Rd6 30.Rd6 Kg6? 31.Ra6 Rc8 32.Bc5! Bg7 33.Rc6 Ra8 34.a3 Ra4 35.Bb4 Kf7 36.Rc7 (36.Rc7 Kg6 37.b6+–) 1–0. donaldzikzpo (1665) – miziii, kurnik, 2012.

7.d4 Qe7 8.de5 de5 9.Nbd2 Na6 10.b5 Nc5 11.Nc4 Now all is on e5 11...Nh6 (better is 11...f6!?+=) 12.Nfe5 Rd8 13.Qc1 0–0 14.Nc6 Bc6 15.Bg7 Kg7 16.bc6 Qe6 17.Qa3 Qc6 18.Qa7 Ne4 (18...Ra8 19.Bf3 Qf3 20.Qc7+= (20.gf3? Ra7 21.a3 Rd8–+)) 19.Ne5 Qf6 20.f4 (worse is 20.Qc7 Rc8 21.Nd7 Rc7 22.Nf6 Kf6–/+) 20...Nd2 21.Rfd1 Ne4? 22.Qc7+– Rd1 23.Rd1 Qh4 24.Rf1 Nf5 25.Nf3 Qf6 26.Bd3 Nc5 27.Qe5 Nd3 28.cd3 Qe5 29.Ne5 Ne3 30.Re1 Nc2 31.Re2 Nb4 32.Rb2 Nd5 33.g3 f6 34.Nd7 Rf7 35.Nb6+– Rb7 36.Nc4 Rb2 37.Nb2 Nb4 38.a3 Nd3 39.Nd3 f5 40.a4 Kf7 41.Nc5 Ke7 42.a5 Kd8 43.a6 Kc8 44.Kf2 Kb8 45.Ke3 Ka7 46.Kd4 Kb6 47.Kd5 h6 48.Kd6 g5 49.fg5 hg5 50.Ne6 f4 51.gf4 gf4 52.Nf4 Ka6 53.h4 Kb6 54.h5 Kb5 55.h6 Kc4 56.h7 Kd4 57.h8R Ke3 58.Ng6 Ke4 59.Ke6 Kd4 60.Ne5 Ke4 61.Rh5 Kf4 62.Kf6 Ke4 63.Ng6 Kd4 64.Ke6 Ke4 65.Rh4 Kd3 66.Kf5 Ke3 67.Ne7 Kd3 68.Ke5 Kc3 69.Kd5 Kd3 70.Rh3 Kd2 71.Ke4 Kc2 72.Nd5 Kb2 73.Kd4 Ka2 74.Kc4 Kb2 75.Nf6 Kc2 76.Rh2 Kd1 77.Kb3 Ke1+– 78.Kc3 Kf1 79.Kd3 Kg1 80.Ra2 Kf1 81.Ke3 Kg1 82.Kf3 Kh1 83.Kg3 Kg1 84.Ra1# 1–0. ariank – dom500, kurnik, 2012.

7.Ne1 Nd7 8.c4 Ngf6 9.Nc3 c6 10.h3 Qc7 11.d3 0–0–0 12.e4 Rdg8 13.a4 White prepares b5 13...c5 14.b5 Nb8 15.Nc2 Nfd7 16.f3 f5 17.g4 (17.Nd5!? Bd5 18.cd5+/–) 17...f4 18.g5 (better is 18.a5!?=) 18...h6–/+ 19.h4 hg5 20.hg5 Rh5 21.Kf2 Rgh8 22.Rg1 Qd8 23.Nd5 Rh2 24.Rg2?? Qg5 25.Qf1 Rg2 26.Qg2–/+ Rh2?? 27.Rg1 Rg2 28.Rg2 Qh4 29.Kf1 g5 30.Ne7 Kc7 31.Nf5 Qh1 32.Rg1 Qh8 33.Rg5 Bf6 34.Rg1 Nf8 35.Ne1 Ne6 36.Ng2 Ng5 37.Bd1 Qh3 38.Kf2 Nd7 39.Bc1 Nf8 40.Be3 fe3 (40...fe3 41.Nge3 Qh2 42.Rg2 Qh1–+) 0–1. cogit – karacho1, kurnik, 2012.

7.g3 Qd7 8.c4 f5 9.d3 (9.d4 e4 10.Nfd2 c5=) 9...e4 (better is 9...Bf3 10.Bf3 e4 11.Bg7 Qg7 12.Be4 fe4–/+) 10.Bg7= Qg7 11.Nd4 c5 12.bc5 dc5 13.Nc2 Na6 14.a3 Rd8 15.d4 cd4 16.Nd4 Ne7?? (16...Nc5 17.Nd2=) 17.Qa4?? (better is 17.Ne6 Rd1 18.Ng7 Kf7 19.Rd1+– (19.Bd1?! Kg7 20.Be2 Rc8+/–)) 17...Kf8?? 18.Ne6+– Kg8 19.Ng7 Kg7 20.Nc3 1–0. horacyad2010 – mauxt, kurnik, 2011.

4.Nf3 Nf6

5.c4 g6 6.b5 Bg7 7.Nc3 0–0 8.Be2 a6 9.a4 ab5 10.ab5 Ra1 11.Qa1 Nbd7 12.0–0 Nc5 13.d4 Nce4 14.Qb1 Nc3 15.Bc3 Qd7 16.Rc1 Be4 17.Qb2 Qg4 18.d5 h5 19.h3 Qd7 20.Ng5 Bf5 21.e4 Ne4 22.Bg7 Ng5 23.Bf8 Bh3 24.Qg7 1–0. thecat74 – tatakarol, kurnik, 2012.

5.c4 g6 6.b5 Bg7 7.Nc3 0–0 8.Be2 c6 9.a4 cb5 10.ab5 a6 11.0–0 ab5 12.cb5 Ra1 13.Qa1 Nbd7 14.h3 Qc7 15.Rc1 Ra8 16.Qb1 Qd8 17.Nd4 Nc5 18.Bf3 Bf3 19.Nf3 Qd7 20.Nd4 Nfe4 21.Ne4 Ne4 22.Nc6 Bb2 23.Qb2 Qe6 24.d3 Nc5 25.Rd1 Ra2 26.Qd4 Qf5 27.Ne7 1–0. thecat74 – tatakarol, kurnik, 2012.

5.Be2 g6 6.0–0 Bg7 7.d3 0–0 8.Nbd2 c5 9.b5 Nbd7 10.c4 a6 11.a3 ab5 12.cb5 e5 13.Qc2 Nd5 14.Nc4 f5 (better is 14...Qe7=) 15.Nd6+/– Qc7 16.Nb7 Qb7 17.Rfd1 Rfd8 18.Rac1 e4? (better is 18...Bf6+/–) 19.de4+– Bb2 20.Qb2 fe4 21.Bc4 Nf8 22.Rd5 Rd5 23.Bd5 Qd5+/– 24.Ne1 Ne6 25.g3 Rd8 26.Ng2 Ng5 27.Nf4 Nf3 28.Kg2 Qf7 29.Qc2 g5 30.Qe4 Nd2 31.Qc6?? gf4+= 32.ef4 Qd5 33.Qd5 Rd5 34.g4 Ne4 35.f5 Rd2 36.Rf1 c4 37.h4 c3–+ 38.g5?? c2 39.Kf3 Rf2! 40.Rf2 Nf2 41.Kf2 c1Q 42.Kf3 Kf7 43.Kg4 Qe3 44.h5 Ke7 45.g6 1–0. ejdrzej (1670) – swietlik, kurnik, 2012.

5.Be2 g6 6.0–0 Bg7 7.d4 0–0 8.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 b6 6.Be2 Bb7 7.0–0 d6 8.d4).

5.Bf6 ef6 6.Be2 g6 7.0–0 Bg7 8.d4 0–0 9.c4 f5 10.d5 Ba1 11.Nbd2 Bg7 12.Nb3 c6 13.a4 cd5 14.cd5 Nd7 15.Ng5 Qg5 16.Bb5 Ne5 0–1. riditko – tatakarol, kurnik, 2012.

5.h3 g6 6.Be2 Bg7 7.0–0 0–0 8.c4 a6 9.a4 c5 10.b5 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.Nc3 Ne4 14.Ne4 Be4 15.d3 Ba1 16.Qa1 Bf3 17.Bf3 Ne5 18.Be2 h5 19.f4 Nd7 20.Bf3 Nf6 21.d4 cd4 22.Qd4 Qc7 23.Ra1 Rb8 24.Ra6 Qc5 25.Qc3 d5 26.Ra4 dc4 27.Rc4 Qb5 28.Rc8 Rc8 29.Qc8 Kg7 30.Qc7 Qc5 31.Qe5 Qe5 32.fe5 Nd7 33.Bc6 Ne5 34.Bb5 Kf6 35.Kf2 Kg5 36.g3 f6 37.Ke2 f5 38.Be8 Nc4 39.Bc6 Nd6 40.Kf3 e5 41.e4 fe4 42.Be4 Ne4 43.Ke4 Kf6 44.h4 b5 45.Kd3 Kf5 46.Kc3 Kg4 47.Kb4 Kg3 48.Kb5 Kh4 49.Kc5 Kg4 50.Kd5 h4 51.Ke5 h3 52.Kf6 g5 53.Kg6 h2 54.Kh6 h1Q 55.Kg6 Kf4 56.Kf6 g4 57.Ke6 g3 58.Kd7 g2 59.Ke7 g1Q 60.Ke6 ½–½. riditko – tatakarol, kurnik, 2012.

4.f4 Nd7

5.Nf3 Qc8 6.Be2 Ngf6 7.0–0 g6 8.c4 Bg7 9.Qb3 0–0 10.Nc3 Ne4 11.Rad1 Nc3 12.dc3 Nf6 13.a4 Ne4 14.Rd3 Qe6 15.Nd4 Bd4 16.cd4 Ba6 17.b5 Bb7 18.d5 Qd7 19.Bf3 Nc5 20.Qc3 f6 21.Rdd1 Qf5 22.g4 Qd7 23.a5 Na4 24.Qd4 Nb2 25.Qb2 ba5 26.Ra1 Qd8 27.Ra5 c6 28.Rfa1 c5 29.Ra7 Ra7 30.Ra7 Bc8 31.b6 Bd7 32.b7 Qc7 33.Ra8 Kg7 34.Rf8 Kf8 35.b8Q Qb8 36.Qb8 1–0. elsh1403 – burbonxiv, kurnik, 2012.

5.Nf3 e6 6.Be2 Qe7 7.0–0 Ngf6 8.c4 h6 9.Nc3 Ne4 10.a4 g5 11.Ne4 e5 12.Ng3 gf4 13.ef4 Rg8 14.Nf5 Qf6 15.Qc2 Qg6 16.g3 ef4 17.N3h4 Qe6 18.Rae1 0–0–0 19.Bf3 Bf3 20.Re6 fe6 21.Rf3 ef5 22.Rf4 Ne5 23.Be5 de5 24.Qf5 Kb8 25.Qe5 Bd6 26.Qe6 Bf4 27.d4 Bg5 28.Nf5 Rge8 29.Qf7 Re1 30.Kg2 Re2 31.Kh3 Rde8 32.Ng7 1–0. elsh1403 – radirozlak, kurnik, 2012.

5.Nf3 Bf3 6.gf3?! e5 7.Qe2 Qh4 8.Kd1 ef4=.

5.Nf3 Bf3 6.Qf3 e5 7.a3 Ngf6 8.Bb5 Rb8 (better is 8...e4!? 9.Qh3 Be7+–) 9.fe5+– de5 10.Be5 Be7 11.0–0 0–0 12.Bg3 a6 13.Bc4 (better is 13.Ba6!? Bd6+–) 13...b5+/– 14.Bb3 Re8 15.d3 Bd6 16.Bd6 cd6 17.Nd2 Ne5 18.Qg3 Nh5 19.Qh3 Qg5?? (19...Nf6 20.d4 Nc6 21.c4+/–) 20.Rae1 (better is 20.Rf5 Qg6 21.Qh5 Qh5 22.Rh5+–) 20...Ng6?? (better is 20...Nf6+/–) 21.Rf5 Qe7 22.Rh5 h6 23.Qf5 Kh7 24.Bf7 (24.Bf7 Qf6 25.Qf6 gf6 26.Be8 Re8 27.Rd5+–) 1–0. amator111 (1670) – pabl0s, kurnik, 2011.

5.Nf3 f6 6.Be2 Nh6 7.0–0 Nf7 8.Nd4 e5 9.Ne6 Qc8 10.Bf3 c6 11.Bg4 g6 12.fe5 de5 13.Nf8 Rf8 14.a4 (14.Rf6! Qc7 15.Rf1+/–) 14...f5+= 15.Be2 Qc7 16.a5 b5 17.a6 Bc8 18.c4 e4 (18...bc4 19.Bc4 Nb6 20.Bb3+=) 19.Nc3 (better is 19.cb5!? cb5 20.Nc3+–) 19...bc4+= 20.Bc4 Nb6 21.Be2 Be6 22.Na4 Na4 23.Qa4 Rb8 24.b5 cb5+= 25.Bb5 Bd7 26.Bd7 Qd7 27.Qa3 Qd2 28.Bf6 Qb4?? 29.Qc1?? Nd6?? 30.Qc6+– Kf7 31.Be5 Rfd8 32.Rad1 Ne8? 33.Bb8 Rd1?? 34.Rd1 Qb8 35.Qd7 Kg8 36.Qe6 Kf8 37.Rd7 Qb1 38.Kf2 Qb2 39.Kg3 Qf6 40.Qf6 Nf6 41.Ra7 g5 42.Rb7 Nd5 Black prepares the advance f4 43.Rh7 f4+– 44.ef4 gf4 45.Kf2 e3 46.Ke1 Nb4 47.a7 Nc2 48.Ke2 Nd4 49.Kd3 e2 50.a8Q# 1–0. wybitnytalent – shemi2008 (1690), kurnik, 2011.

5.Nf3 Ngf6 6.Be2 a5 7.c3 ab4 8.cb4 e5 9.Nc3 ef4 10.ef4 Be7 11.0–0 0–0 12.d4 c5 13.dc5 dc5 14.a3 (better is 14.b5!?=) 14...cb4–/+ 15.ab4 Ra1 16.Qa1 Bb4 17.Nb5 Bc5 18.Kh1 Bc6 19.h3 Qa8 20.Qc1 Ne4 21.Bd3? (better is 21.Kh2–/+) 21...Ng3–+ 22.Kh2 Nf1 23.Qf1 Bb5 24.Bb5 Qd5 25.Bc4 Qd6 26.Ne5 Nf6 27.Qf3 Qd2 28.Ba1 Qc1 29.Bc3 Qg1 30.Kg3 Qe3 31.Nf7? Qf3 32.Kf3 Rf7 33.Bf7 Kf7 34.g4 Nd5 35.Be5 Ne7 36.h4 b5 37.h5 b4 38.Ke2 Nc6 39.Bb2 Ke6 40.Kd3 Kd5 41.Bg7 Bd4 42.Bf8 Bc5 43.Bg7 Nd4 44.Kd2 Bd6 45.f5 Be5 46.f6 Ne6 47.f7 Bg7 0–1. elsh1403 (1650) – mosioan, kurnik, 2012.

5.Nf3 Ngf6 6.Be2 e6 7.0–0 Be7 8.c4 d5 9.Nc3 (9.cd5 Nd5 10.b5 0–0=) 9...c6 (9...Bb4!? 10.cd5 Bc3 11.Bc3 Bd5+=) 10.Qb3 0–0 11.cd5 cd5 12.Nd4 Rc8 13.a3 a6 14.Rfc1 b5 15.Nd1 Ne4 16.Qd3 (16.Rc8 Qc8 17.d3 Nd6+=) 16...Nb6 17.Bf3 (better is 17.Rc8 Qc8 18.Nb5=) 17...f5?? (better is 17...Nc4 18.Bc3 Bf6+=) 18.Ne6+– Qd6 19.Nf8 Rf8 20.Be5 Qe6 21.Be4 fe4 22.Qd4 g5? 23.Rc7 Bc8 24.Rac1 Nc4 25.Qa7 Re8 26.a4! ba4 27.Nc3 d4?? 28.Bd4 gf4 29.Ne2 Nd2 30.Rc8! Kf7 31.Re8 Ke8 32.Nf4 Qg8 33.Qa8 Bd8+– 34.Rc8 Qg5 35.Qc6 Kf7 36.Qe6 Kf8 37.Qd6 Qe7 38.Qe7 Ke7+– 39.Bf6! Kf6 40.Rd8 Nc4 41.Rd4 Ne3 42.Re4 Nc2 43.Rc4 Ne3 44.Rc6 Ke5 45.Nd3 Ke4 46.Nc5 Kd4 47.Ra6 Kc4 48.Ra4 Kb5 49.Ra3 Nc4 50.Rb3 1–0. wybitnytalent – acer56, kurnik, 2011.

5.Nf3 Ngf6 6.Be2 g6 7.0–0 Bg7 8.c4 0–0 9.Nc3 Ng4 10.h3 Nh6 11.a4 Nf5 12.Qb3 e5 13.Kh2 ef4 14.ef4 Re8 15.Rae1 (15.Bd3 Bf3 16.Bf5 A) worse is 16...gf5 17.Rf3 (worse is 17.gf3 Qh4–+) 17...a5 18.Rg3+=; B) 16...Bb7 17.Bd7 Qd7+=) 15...Rb8 (15...Bf3 16.Bf3 (16.gf3?? Qh4 17.Ne4 Bb2–+; worse is 16.Rf3 Nd4 17.Qd1 Nf3 18.Bf3 Re1 19.Qe1 Rb8–/+) 16...Re1 17.Re1–+) 16.g4 (better is 16.Qd1=) 16...Bf3–+ 17.Bf3 Nd4?? 18.Qa2?? Nf3 19.Rf3 Re1 20.Re3 Re3 21.de3 Qe7 22.Nd5 Qe4 23.Bg7 Kg7 24.Qb2 f6 25.Nc7 Qe3 26.f5 Qe5 27.Kg2 Qb2 (27...Qb2 28.Kf3 Qb4 29.Ne6 Kf7–+) 0–1. elsh1403 – janusz50, kurnik, 2012.

4.f4 f6

5.Nf3 e5 6.fe5 fe5 7.Be2 Nf6 8.0–0 Be7 9.Ng5 0–0? (better is 9...Qd7=) 10.Ne6+– Qe8 11.Nf8 Qf8 12.d3 Qf7 13.Nd2 Qg6 14.Nf3 Nbd7 15.Nh4 Qg5 16.Bf3 c6? (16...e4 17.Nf5 ef3 (17...Qf5? 18.Be4 Qe6 19.Bb7+–) 18.Rf3 Bf8=) 17.Qe1 Rf8 18.Qg3 Qe3 19.Kh1 Qh6?? (19...Qf4 20.Qf4 ef4+–) 20.Nf5 Qg6 21.Ne7 Kh8 22.Ng6 hg6 23.Qg6 Kg8 24.Be4 d5 25.Bf5 d4 26.Be6 Kh8 27.Rf3 Nh7 28.Rh3 Ndf6 29.Rf1 Bc8 30.Bf5 Bf5+– 31.Rf5 Kg8 32.Rg3 Rf7+– 33.Re5 Nf8 34.Qf7! Kf7 35.Reg5 Ne6 36.Rf5 g6 37.Rf1 c5 38.bc5 bc5 39.Rgf3 Ke7 40.Rf6 g5 41.Re6! Ke6 42.h4! gh4 43.Kh2 Kd5 44.Kh3 c4 45.dc4 Kc4 46.Bd4! Kd4 47.Kh4 Kc3 48.Rf7 Kc2 49.Ra7 Kc3 White now must not overlook the idea Rc7+ 50.Rd7 Kb4 51.g3 (51.g3+–) 1–0. elsh1403 – wolkodaw7, kurnik, 2011.

5.Nf3 g6 6.c4 Bg7 7.d4 Nd7 8.Nbd2 Nh6 9.Bd3 Ng4 10.Qe2 a6 (10...c5 11.bc5 bc5 12.d5+/–) 11.0–0 f5 12.h3 Nh6 13.Ng5 Nf8 14.Nb3 Qd7 15.d5 0–0–0?? (better is 15...Bb2 16.Qb2 Rg8+/–) 16.Bg7+– 1–0. orangutandu – hvalrossen, kurnik, 2011.

5.Qh5 g6 6.Qd1 Bg7 7.Nf3 e5 8.fe5 fe5 9.Be2 Ne7 10.0–0 0–0 11.Ng5 Bc8 12.Bg4 h6 13.Be6 Be6 14.Ne6 Rf1 15.Qf1 Qd7 16.Ng7 Kg7 17.d4 Qe6 18.c4 Nd7 19.Nc3 Rf8 20.Qd3 Qf5 21.Ne4 Nc6 22.a3 ed4 23.ed4 Re8 24.Re1 Kh7 25.Qf3 Ne7 26.Qg3 Ng8 27.Qf3 Ndf6 28.Nf6 Nf6 29.Re8 Ne8 30.Qc6 Qb1 31.Kf2 Qb2 32.Kg3 Ng7 33.Qc7 Qa3 34.Kg4 h5 35.Kh4 Qb4 36.Qa7 Qc4 37.Qb6 Qe6 0–1. elsh1403 (1605) – kastaldi (1655), kurnik, 2012.

5.Qh5 g6 6.Qh4 Nd7 7.Bd3 Bg2 8.Bg6?? (better is 8.Qg3 Bd5 9.Nc3=) 8...hg6–+ 9.Qg3 Kf7?? (better is 9...Bd5 10.Qg6 Bf7–+) 10.Qg2+= Nh6 11.Nc3 Nf5 12.0–0–0 e6 13.Nf3 d5 14.a3 a5 15.b5 a4 16.Nd4 Bc5 17.Nf5 gf5 18.Ne2?? (better is 18.Rdg1 Qf8 19.Nb1+/–) 18...Qe7–/+ 19.Nd4 Ba3 20.Nc6 Qc5 21.d4?? (better is 21.Ba3 Qa3 22.Kb1–/+) 21...Bb2–+ 22.Kb2 Qb5 23.Ka1 Qc6 24.c4 Qc4 25.Rc1 Qd3 26.Rc7 Rhd8 27.Rg1 Ke7 (27...Qe3!? 28.Qg7 Ke8 29.Rgc1 Qa3 30.Kb1–+) 28.Qg7 Kd6 29.Rgc1 Qe3 (better is 29...Qb5–+) 30.R1c6# 1–0. lllllll21 – kestasl, kurnik, 2012.

5.Qh5 g6 6.Qh4 Bg7 7.Nf3 e5 8.fe5 de5 9.Bd3 Qe7 10.Bg6?? (better is 10.b5=) 10...hg6–+ 11.Qc4 Nd7 12.Nc3 0–0–0 13.Nd5? (better is 13.Nb5 Nf8 14.Na7 Kb8 15.Nb5–+) 13...Qd6 14.e4 Ne7 15.Ne7 Qe7 16.0–0–0 Kb8 17.Ba3 Rhe8 18.Rhe1 Qe6 19.Qc3?! Qa2 20.d4 a6 21.d5 f5 22.Ng5 Nf6 23.Ne6 Ne4 24.Qc7 Ka7 25.Nd8 Qa1# 0–1. elsh1403 – aidi2007, kurnik, 2011.

3.e3 e5

4.a3 f6=.

4.b5 c6 5.a4 c5 (5...f6 6.d4 ed4 7.Bd4=) 6.c4 (6.Be5 Nf6+/–) 6...d5 7.cd5 Bd5 8.Nf3 Bd6 9.Ne5 Qf6?? (9...Nf6 10.Nc4+/–) 10.d4 (better is 10.Nc4 Qe6 11.Nd6 Kf8 12.Nc4+–) 10...cd4 11.ed4 Qe6 12.Qe2 Nf6 13.Nd2 0–0 14.Ndf3 Bb4 15.Nd2 Ne4 16.Rd1 Nd2–+ 17.Rd2 Bd2 18.Kd2 f6 19.Nf3 Qe2 20.Be2= Nd7 21.Rc1 Rac8 22.Ra1 Bc4 23.Bd1 Rfe8 24.a5 Bb5–+ 25.ab6 ab6 26.Ra7 Nf8 27.Rb7 Rb8 28.Rc7 Rec8 29.Re7 Ng6 30.Ra7 Bc4 31.Ra4 b5 32.Rb4 Ra8 33.Kc3? Ra2 34.Bb3?? Raa8 35.Bd1 Nf4 36.g3 Nd3 37.Nh4 Nb4 38.Kb4 Ra2 39.Kc3 Be2 40.Kd2 Rb2 41.Ke1 Rc1 42.Ng2 Rd1# 0–1. renatus62 – ybreg85, kurnik, 2012.

4.b5 d6 (--> 1.b4 e5 2.Bb2 d6 3.b5 b6 4.e3 Bb7).

4.b5 Nf6 5.Be5+= Be7 6.c4 (6.Nf3 0–0+=) 6...0–0 7.Bc3 (7.Nf3 a6+=) 7...d6 (7...a6 8.Nf3=) 8.Nh3 Bc8 (8...a6 9.Nf4+=) 9.a4 d5 10.d4 Bd6 (10...c6 11.Nf4+=) 11.Qd2 (better 11.cd5 Nd5 12.Bd3+–) 11...Bb4?? (11...a6 12.Ng5+=) 12.Be2 (better 12.Bb4 Re8 13.Nf4+–) 12...Ne4 13.Kd1?? (better 13.Qb2 Bc3 14.Nc3 Bh3 15.gh3 Nc3 16.Qc3+–) 13...Ng5 (better 13...Bc3 14.Qc3 Nc3 15.Nc3 Bh3 16.gh3 dc4 17.Bc4 a6–+) 14.Bd3 (better 14.Bb4 Bh3 15.gh3 Re8+–) 14...Qd7?? (14...Bg4 15.f3 Bc3 16.Nc3 Nf3 17.gf3 Bf3 18.Kc2 Bh1 19.Rh1 dc4 20.Bc4+–) 15.e4 (15.Bb4!? Qg4 16.Qe2 Nh3 17.gh3 Qh3+–) 15...Bd6?? (15...Qg4 16.Be2 Bc3 17.Nc3 Ne4 18.Ne4 Qg2 19.Nf6 Kh8+–) 16.Qb2 (better 16.Qg5 dc4 17.Bc4+–) 16…Qg4 (16...Qg4 17.f3 Nf3=+; 16...Nh3 17.gh3 Qh3 18.Kc2 de4 19.Be4=+) 0–1. RichardSommer (2070) – lollipop1 (2035), lichess.org, 2020.

4.b5 g6 5.Nf3 (5.Be5 f6 6.Bb2 a6+/–) 5...Bg7 (5...f6 6.Be2=) 6.c4 d6 7.Nc3 Nd7 8.d4 Qe7 9.Qb3 e4 10.Nd2 f5 11.Be2 0–0–0 12.0–0 g5 13.a4 h5 Black plans g4 14.a5 g4 15.ab6 ab6 16.Rfc1 h4 17.Na4 g3 18.h3 gf2 19.Kf1 (better is 19.Kf2!? Rh6 20.Rf1+=) 19...f4!+= 20.ef4 (20.c5 dc5 21.dc5= (21.Kf2?? fe3 22.Kg1 ed2–+)) 20...e3–/+ 21.Nf3 Ngf6 22.c5?? dc5 23.dc5?? Nc5 24.Nc5? bc5?? 25.Ne5+/– Nd5?? 26.Nc6 Qf7 27.Bg4 Rd7 28.Na7 Kb8 29.Rc5?? Bb2 30.Nc6+– Kc8 31.Ra7?? e2!–/+ 32.Be2 Nf4?? 33.Bg4?? Qb3–+ 34.Bd7 Kd7 35.Rb7 Qd1 36.Kf2 Qe2 37.Kg1 Nh3 38.Kh2–+ Nf4 39.Re5 Qg2# 0–1. captainevans – killik111, kurnik, 2012.

4.c4 Bb4 5.Be5 Qe7 6.Bg7 Nc6 7.Bh8 Nf6 8.Nf3 0–0–0 9.Bf6 Qf6 10.Nc3 Bc3 11.dc3 Qc3 12.Nd2 Nb4 13.Rc1 Na2 14.Rc3 Nc3 15.Qc2 1–0. karoo54 – gasparetti1, kurnik, 2012.

4.Be5 Bb4 5.Bg7 f6 6.Bh8 Qe7 7.Qh5 Kf8 8.Bd3 Bg2 9.Bh7 Bh1 10.Bg8 Nc6 11.Bh7 Ne5 12.Qh6 Kf7 13.Qg7 Ke6 14.f4 Qg7 15.Bg7 Ng4 16.f5 Kf7 17.Bf6 Kf6 18.Ne2 Rh8 19.Bg6 Rh2 20.Nf4 Bf3 21.c3 Re2 22.Kd1 Bd6 23.Kc2 Bf4 24.ef4 Be4 25.Kb3 Bf5 26.Bf5 Kf5 27.Na3 Rd2 28.Rf1 Ne3 29.Rf3 1–0. riditko – sheti, kurnik, 2012.

4.Be5 Bb4?? 5.Bg7+– Qg5 6.Bh8 f6 (6...Bg2 7.Nf3 Bf3 8.Qf3+–) 7.Nf3 Qg6 8.Nc3 (8.a3 Be7 9.Bd3 f5+–) 8...Nc6 (8...Bc3 9.dc3 h5 10.Bc4+–) 9.a3 (better is 9.Bd3!? Qf7 10.Ne4 0–0–0+–) 9...Bc3 10.dc3 Qf7 11.Bd3 0–0–0 12.0–0 Nh6 13.Bf6! Qf6 14.c4 Qg7 15.g3 Na5 16.Nd4 Qf7 17.f4 c5 18.Nb5 Qe6 19.Na7 Kb8 20.Nb5 Qh3 21.Rf2 Ng4 22.Bf5 Qh6 23.Bg4 Nc4 24.Qd3 Qc6 25.Bf3 Qb5 26.Bb7 Kb7 27.Rb1 Qb1+= 28.Kg2 d5 0–1. Fournier,Frederic (1910) – pumbas, Active, 2011.

4.Be5 Nc6 5.Bb2 Nb4 6.Nf3 Be4 7.d3 Bf3 8.gf3 Nf6 9.c4 Be7 10.a3 Na6 11.f4 0–0 12.Be2 c6 13.Nd2 Nc5 14.Nf3 Re8 15.Rg1 b5 16.cb5 cb5 17.Ne5 Rc8 18.Rc1 Qa5 19.Kf1 Na4 20.Ba1 Nb6 21.Bb2 Rc1 22.Bc1 Qc3+= Attacks the isolani on a3 23.Bd2 Qa3–/+ 24.Bf3 d6 25.Nc6 Qd3 26.Be2 Qf5 27.Ne7 Re7 28.Bc3 Re6 0–1. orangutandu – toliminado017, kurnik, 2012.

4.Be5 Nc6 5.Bc3 Nb4 6.a3 Nd5 7.Bb2 c5 8.Nf3 Ngf6 9.Be2 Be7 10.Nc3 (10.0–0 0–0=) 10...0–0 11.Nd5 Nd5 12.0–0 Qc7 13.Be5 d6 14.Bb2 h6 15.Ne1 Rfe8 16.Bf3 Bf6 17.c3 Re7 18.Nd3 Rae8 19.Re1 c4=+ 20.Nb4 Nb4 21.ab4= Bf3 22.Qf3 Re4 23.g3 d5 24.Qg2 a5 25.ba5 ba5 26.f4 Qb6 27.Reb1=+ Rb8 28.Qe2 Qb3–/+ 29.Ra5? Qc2–+ 30.Ra2?? Qb1 (31.Kf2 Qa2–+) 0–1. Cheeky – Wall,Bill, Internet, 2004.

4.Be5 d6 5.Bb2 Nf6 6.Nf3 Be7 7.d4 0–0 8.Bd3 Nbd7 9.0–0 c5 10.bc5 (10.a3 d5+/–) 10...bc5 (10...dc5 11.c4+/–) 11.Nbd2 Rb8 12.Rb1 Qa5 13.c4 (13.a3 Rfe8+/–) 13...cd4 (13...Qa2!? 14.Qc2 Bf3 15.Nf3 Rb6+/–) 14.Bd4 Nc5 15.Qc2 Nd3 16.Qd3 h6 (16...Bc6!?+/–) 17.Rb5+– Qa4? (better is 17...Qa6 18.Rfb1 Nd7+–) 18.Rfb1 Bf3 19.Rb8 (19.gf3?! Rb5 20.cb5 Rc8+/–; 19.Nf3?! Rb5 20.cb5 Rc8+–) 19...Rb8 (19...Bc6+–) 20.Rb8 (20.gf3?! Rb1 21.Qb1 a6+/–; 20.Nf3?! Rb1 21.Qb1 Qc4 22.Ba7 Ne4+/–) 20...Bf8 21.gf3 (21.Nf3 Nd7 22.Rd8 Qc6+–) 21...Qd1 (21...Nd7 22.Rd8 a6 23.Qf5+–) 22.Kg2 a5 (22...Nh7+–) 23.Bf6 gf6 24.Qd6 (24.Qd6 Qg1 25.Kg1 Kg7 26.Qg3 Kh7 27.Rf8 h5 28.Rf7 Kh6 29.Qg7#) 1–0. Pcmvr (2080) – Kpadfield (1800), echecsemail.com, 2008.

4.Be5 d6 5.Bb2 Qg5 6.Nf3 Qg4 7.h3 Qb4 8.Bc3 Qc5 9.d4 Qd5 10.Bd3 c5 11.e4 Qh5 12.d5 Nd7 13.0–0 Ne5? (better is 13...Ngf6+=) 14.Ne5+– de5?? (better is 14...Qd1 15.Bb5 Kd8 16.Nf7 Ke7 17.Rd1 Kf7+–) 15.f4 (better is 15.Bb5 Kd8 16.Qh5+–) 15...Qd1+/– 16.Rd1 ef4 17.Rf1 Bd6?? 18.Bg7+– f6 19.Bh8 Kf7 20.c4 Be5 21.Nc3 Bc3 22.Rac1 Bd4 23.Kh1 Nh6 24.Bf6 Kf6 25.Rf4 Ke5 26.Rcf1 Bc8 27.Rf8 Bb7 28.Ra8 Ba8 29.Rf8 Bb7 30.Rh8 Nf7 31.Rh7 Ng5?? 32.Rb7 Ne4 33.Be4 Ke4 34.d6 Be5 35.d7 Bf6 36.Ra7 Kd4 37.Ra8 Kc4 38.d8Q Bd8 39.Rd8 b5 40.Kg1 Kc3 41.Kf1 c4 42.Ke1 Kc2 43.Rd2 Kc3 44.Kd1 b4 45.Kc1 b3 46.ab3 Kb3 47.Rb2 Kc3 48.Rc2 Kb3 49.g4 c3 50.h4 Kb4 51.h5 Kc4 52.g5 Kd5 53.h6 Ke6 54.g6 Kf6 55.h7 Kg7 56.Rc3 Kg6 57.h8Q Kg5 58.Rf3 Kg6 59.Qg8 (59.Qg8 Kh5 60.Rh3#) 1–0. elsh1403 – mietko3, kurnik, 2012.

4.Be5 d6 5.Bc3 Qg5 6.Nf3 Qg6 7.d4 Nf6 8.Nbd2 (8.Rg1 Be7+/–) 8...Be7 (better is 8...Nd5!? 9.Nb1 Nf6=) 9.Bb2 0–0 10.c4 Nh5 11.Nh4?? (better is 11.Qb1+/–) 11...Bh4–+ 12.Nf3 White intends d5 12...Bf6 13.Be2 Nc6 14.b5 Na5 15.0–0 Rae8 16.d5?? Bc8 17.Nd4 Bh3 18.g3 Ng3! 19.fg3 Qe4?? 20.Bf3?? Qe3–+ 21.Rf2 Nc4 22.Rb1 Nb2 23.Rbb2 Bd4 24.Rbe2 Qf3 (24...Qf3 25.Qd4 Qa3–+) 0–1. typ48 – janusz50, kurnik, 2012.

4.Be5 f6 5.Bc3+/– Nc6 6.a3 Qe7 7.Nf3 0–0–0 8.d4 h6 9.Bb2 g5 10.c4 Bg7 11.Be2 (11.Bd3 Qf7+–) 11...f5+/– 12.Qc2 (12.0–0 g4 13.Nfd2 Re8+–) 12...g4 13.Nfd2 h5 (13...f4 14.d5 (14.Bg4? Nd4 15.Bd4 Bd4–+) 14...Bb2 15.Qb2+/–) 14.d5 (14.Qf5 Nh6 15.Qd3 h4+–) 14...Ne5 15.0–0 d6 (15...Nh6 16.Bd4+/–) 16.f4 (16.Qf5 Kb8 17.Nc3 h4+–) 16...Ng6 (better is 16...Nd7!? 17.Bg7 Qg7+–) 17.Bg7 Qg7 18.Nc3 (18.Qf5 Kb8 19.Ra2 Re8+–) 18...Re8 (18...Qf6 19.Bd3 Nh6 20.Ne2+–) 19.e4 (better is 19.Qf5!? Kb8 20.Qd3 g3+–) 19...fe4 20.Nde4 (worse is 20.Nce4 Nf4 21.Rae1 Rf8+=) 20...Qd4 (20...Nf6 21.Bd3 Ne4 22.Be4+– (22.Ne4?! Nf4 23.Rad1 Qd4 24.Nf2 Qe3=)) 21.Kh1 Nh6 22.Bd3 g3 23.h3 Nh4 24.Ng3 Re3+/– 25.Bf5 N6f5 26.Nf5 Rc3?? 27.Nd4+– Rc2 28.Nc2 Rg8 29.Rf2 c6 30.Ne3 Re8 31.dc6 Bc6 32.Nf1 Ng2 33.Rg2?? Re2+= 34.Ra2?? Bg2–+ (34...Bg2 35.Kh2 Ra2–+) 0–1. carocan (1845) – breguipuzit (1715), kurnik, 2011.

4.Be5 f6 5.Bc3 Nc6 6.Bd3 Nge7 7.Qh5 g6 8.Qd1?? (8.Qh4!? Bg7 9.Bf6 Bf6 10.Qf6+/–) 8...Bg7 (better is 8...Nb4!? 9.Bf1 Ned5=) 9.Nf3+/– d6 10.0–0 Nd5 11.Ng5?? fg5?? 12.Bg7+/– Rg8 13.Bc3 Nc3 14.Nc3 Qd7 15.Nd5 0–0–0? 16.Nf6+– Qg7 17.Ng8 Rg8 18.Be4 h5 19.b5 Ne5 Black prepares the advance g4 20.Bb7 Kb7 21.d4 Nc4 22.a4 d5 23.Qe2 g4 24.e4 Qd7 25.ed5 Qd5 26.c3 Rh8 27.f3 g5 28.a5 gf3 29.Rf3 g4 30.Rf4 Rg8 31.Raf1 Na5 32.Rf5 Qc4 33.Qe4 Kc8 34.Rf8 Rf8 35.Rf8 Kd7 36.Qe8 Kd6 37.Qd8 Ke6 38.Rf6 1–0. wojtekkk – blady300, kurnik, 2011.

4.Be5 Qg5? 5.Nf3+– Na6?? 6.Ng5 f6 7.Ba6 Ba6 8.Qh5 g6 9.Qf3 Bh6 10.Qa8 Ke7 11.Bc7 Bg5 12.Nc3 f5 13.Bd8 Kf7 14.Qd5 Ke8 15.Bg5 h6 16.Qe5 Kf7 17.Qh8 hg5 18.Qh7 Kf6 19.Qg8 (19.Qg8 Ke7 20.e4+–) 1–0. pierre – tolca, internet, 2009.

4.Be5 Qg5 5.Nf3 Qf5 6.Bd3 Qh5 (6...Qg4 7.Be2+/– (7.Bc7? Qg2 8.Rg1 Qf3–+)) 7.Bg3 Bf3 8.Qf3 Qf3 9.gf3 c6 10.Bb8 (10.b5!?+/–) 10...Rb8+= 11.a4 (better is 11.b5!?+=) 11...Bb4+= 12.c3 Bd6 13.f4 g6 14.h4 Ne7 15.c4 a6 16.Nc3 Bc7 17.Ne4 d5 (better is 17...f5!? 18.Nc3 Kf7=) 18.Nf6+/– White intends h5 18...Kd8 19.h5 Ng8 (19...d4!?+=) 20.Ng8+/– Rg8 21.Ke2 Kd7? 22.cd5+/– cd5 23.Ba6 Kd6 24.hg6 hg6 25.Rh7 Rbf8 26.Bb5 g5? 27.Rc1+– Bd8 28.Rc6 Ke7 29.f5 Rh8 30.f6 Ke8 31.Rh8 Rh8 32.Rc8 (32.Rc8 Kf8 33.Rd8#) 1–0. alfons78 – kaskar, kurnik, 2011.

4.Be5 Qg5? 5.Nf3+– Qh5 6.b5 d6 +–.

4.f3 d6 5.c4 Nc6 6.b5 Nce7 7.a4 Ng6 8.a5 Nf6 9.ab6 cb6 10.Qc2 Be7 11.Bd3 0–0 12.e4 Qd7 13.Ne2 Rfb8 14.Nbc3 a6 15.0–0 ab5 16.Nb5 Ra1 17.Ra1 Bc6 18.Qb3 Nf4 19.Nf4 ef4 20.Ra7 Rb7 21.Rb7 Qb7 22.Nd4 Bd7 23.Ne2 g5 24.Bd4 Bd8 25.h3 h6 26.e5 de5 27.Be5 Be6 28.Nd4 Nd7 29.Ne6 fe6 30.Bd6 Qc6 31.Qb4 Nc5 32.Bc5 Qc5 33.Qc5 bc5 34.Be4 Kg7 35.Kf2 Kf6 36.Ke2 Ke5 37.Kd3 Ba5 38.Bg6 Bb4 39.Bf7 Kf6 40.Bh5 Ba3 41.Ke4 Bc1 42.d3 Bb2 43.Bg4 Ke7 44.h4 Kd6 45.Bh5 Kc6 46.Be8 Kd6 47.Bb5 Bd4 48.Ba6 Bf2 49.hg5 hg5 50.Bc8 Bd4 51.Ba6 Ke7 52.Bb5 Kf6 53.Be8 Kg7 54.Bh5 Kh6 55.Bg4 Kg6 56.g3 fg3 57.Bh3 Kf6 58.f4 gf4 59.Kf4 e5 60.Kg3 Kg5 61.Kf3 Kh4 62.Be6 Kg5 63.Bd5 Kf6 64.Be4 Ke7 65.Kg3 Kd6 66.Kg4 Kc7 0–1. poganinbezdom – runeklei, kurnik, 2012.

4.Nf3 Nc6 5.a3 (5.b5 Nce7 6.Be5 Ng6+/–) 5...Qe7 (5...e4 6.Ng1=) 6.Be2 (6.b5!? Nd8 7.Be5+/–) 6...0–0–0 7.0–0 d5? (better is 7...e4!? 8.b5 ef3 9.bc6 dc6 10.Bf3 Qh4+=) 8.b5+– Na5 9.Be5 Nc4 10.d4 f6 11.Bg3 Nh6 12.Qd3 Qe4 13.Qb3 Ng4 (13...Nf5!?+/–) 14.Bd3 Qe6 15.a4 Bd6 16.a5 Bg3 17.hg3 h5 18.ab6+– ab6 19.Bc4 dc4 20.Qc3 Bd5 21.Nbd2 g5 22.Ra7 h4 23.Rfa1?? hg3+= 24.e4?? Bb7 25.d5?? Qd7?? 26.Qc4?? Ne5 27.Ne5+– fe5 28.Nf3 gf2 29.Kf2 Rhf8 30.Ke3 g4?? 31.Ne5 Qd6 32.Ra8! Ba8 33.Ra8 Kb7 34.Rd8 Qd8+/– 35.Qc6 Kb8?? 36.Nd7+– Ka7 37.Nf8 Qf8 38.Qc7 Ka8 39.Qb6 Qa3?? 40.Kf4 Qf8 41.Kg4 Qg8 42.Kf3 Qf8 43.Ke2 (43.Ke2 Qf1 44.Kd2 Qe2 45.Kc3 Qc2 46.Kb4 Qc3 47.Ka4 Qa1 48.Kb3 Qb1 49.Ka3 Qa1 50.Kb4 Qc3 51.Kc3=) 1–0. slax1 – sewkoy, kurnik, 2011.

4.Nf3 f6 5.b5 d5 6.c4 c5 7.cd5 Bd5 8.Nc3 Bb7 9.Bc4 Nd7 10.Qb3 Nh6 11.0–0–0 Bd6 12.Nd5 a6 13.a4 ab5 14.ab5 Nf5 (better is 14...Ng4!? 15.Nh4 Nf2–+) 15.g4 Ne7 16.g5 Nd5 17.Bd5 Qc7 18.Bf7? (better is 18.d3 Rf8 19.gf6 Rf6 20.Bb7 Qb7 21.Qg8 Nf8 22.Ng5=) 18...Kf8–+ 19.Be6 (19.gf6 Bf3 20.fg7 Kg7 21.Rdg1 Kf8 22.Qe6+/–) 19...Bf3 20.Rdg1 Bh1 21.gf6 Nf6 22.Rh1 c4! 23.Bc4 Rc8 24.d3 e4 25.Kb1 ed3 26.Bd3 Qe7 27.Bf5 Rb8 28.Rc1 g6 29.Bd3 Kg7 30.e4 Rhc8 31.Re1 Rc5 32.f4?? Bf4 33.Ba3 Rbc8 34.Bc5 Rc5 35.Rf1 Be5 36.Bc4 Qc7 37.Bd5 Rc3 38.Qb4 Qc5 39.Qc5 Rc5 40.Bc6 Ng4 41.h3 Ne3 42.Re1 Nc4 43.Rd1 Na3 44.Ka2 Nb5 45.Rd7 Kh6 46.Bd5 Nc3 47.Kb3 Nd5 48.ed5 g5 49.Rb7 Rd5 50.Rb6 Kh5 51.Kc4 Rd4 52.Kc5 Rd1 53.Re6 Bf4 54.Re4 Kh4 0–1. elsh1403 (1665) – peter62 (1710), kurnik, 2011.

3.e3 e6

4.a3 c5 5.b5 d5 6.Nf3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6 6.Nf3 Bb7).

4.a3 c5 5.bc5 bc5 6.Nc3 Nf6=.

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

4.a3 d6 5.Nf3 a6 6.c4 (6.d4 Nf6+=) 6...Nd7 (6...Nf6 7.d4+=) 7.Nc3 (7.d4 Ngf6+=) 7...Ngf6 8.Be2 Be7 9.Rg1 (9.0–0 c5=) 9...h5 (9...c5 10.d4=+) 10.h3 (10.d4 0–0=) 10...c5 11.d3 Qc7 (11...d5 12.cd5 ed5 13.bc5 bc5 14.Rb1=) 12.Nd2 (12.b5 d5=) 12...Ne5 (12...cb4 13.ab4 d5 14.cd5 Bb4 15.Rc1=) 13.f4 Ng6 (13...Ned7 14.b5=) 14.Bf3 (14.Nce4 h4+=) 14...Nh4 (14...d5 15.bc5 Qc5 16.Kf2=) 15.Bb7 Qb7 16.Kf1 (16.Nf3 Nf3 17.gf3 Rg8=) 16...Nf5 (16...b5 17.bc5 dc5 18.cb5=) 17.Kf2 h4 (17...b5 18.Nce4=) 18.Qf3 (18.e4 Nd4=) 18...Qf3 19.Nf3 cb4 (19...d5 20.cd5 Nd5 21.Nd5 ed5 22.bc5 Bc5 23.Rge1=) 20.ab4 Kd7 (20...d5 21.b5 Bc5 22.Nd1=) 21.Ne2 (21.Ra4 b5 22.cb5 ab5 23.Ra8 Ra8+–) 21...b5 (21...d5 22.g4 hg3 23.Ng3 Ng3 24.Rg3=) 22.e4 (22.cb5 ab5 23.e4 Ng3+–) 22...Ng3 23.cb5 (23.Ng3 hg3 24.Ke3 Rhb8+=) 23...Ne2 24.Ke2 ab5 25.Nd4 (25.Ke3 Ra4+=) 25...Rhc8 (25...Rhb8 26.Ra8 Ra8 27.Rb1=) 26.Kd2 (26.Kf3 Ra4 27.Nb5 Rb4 28.Ra7 Kd8 29.Bf6 gf6+=) 26...Nh5 (26...d5 27.Nb5 Bb4 28.Ke3=) 27.Ne2 (27.Nb5 Nf4 28.Rgc1 Ra1 29.Ra1 d5 30.Ra7 Ke8 31.Nc7 Kf8=+) 27...Bf6 (27...d5 28.Bc3=+) 28.Bf6= gf6 (28...Nf6!? 29.Nd4 Nh5+=) 29.Ke3 (29.Ra5 Ra5 30.ba5 Ra8+=) 29...Ra1 (29...f5!?+=) 30.Ra1+– Rc2 (30...f5 31.Nd4 fe4 32.Ra7 Rc7 33.Rc7 Kc7 34.de4+– (worse 34.Nb5 Kb6 35.Nd6 ed3+=)) 31.Ra5 (31.Ra7 Ke8 32.Ra8 Kd7+–) 31...Rb2 (better 31...Ng3!? 32.Ng3 hg3+–) 32.Rb5+– Kc6?? (better 32...Re2 33.Ke2 Nf4 34.Kd2 Kc6+–) 33.Rh5 e5 (33...Rb4 34.Rh7 Rb7 35.Nd4 Kb6 36.Rh4+–) 34.Rh4 1–0. FeegLood (2775) – Tilicheev_Viacheslav (2560), lichess.org, 2017.

4.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7).

4.a3 Nf6 5.Nf3 c5 6.b5 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6 6.Nf3 Bb7).

4.b5 Bc5?? 5.Bg7 f6 (5...a6 6.Nc3+–) 6.Bh8 (6.Qh5!? Ke7 7.Bh8 h6+–) 6...Qe7 7.Qh5 (7.Nc3 Qf7 8.Nge2 d5+–) 7...Qf7 8.Qf7 (better 8.Qh4 d6 9.c3 Nd7+–) 8...Kf7 9.d4 Bd6 (9...Be7 10.e4!+–) 10.Be2 (better 10.Nf3 a6 11.c4 Bb4 12.Nbd2 Ne7+–) 10...Bg2 11.Bf3 Bf3 (11...Bh1 12.Bh1 c6+–) 12.Nf3 a6 13.Rg1 Bf8 14.c4 (better 14.Nc3 ab5 15.Nb5 Na6+–) 14...ab5 15.cb5 c6 (15...Ne7 16.Nh4 d5 17.Nd2+–) 16.Nc3 Bb4 (16...Ne7 17.Bf6! Ng6 18.Ne4 cb5 19.Ne5 Ke8 20.Ng5 Ne5 21.Be5+–) 17.Kd2 Ra3 18.Rgc1 (better 18.Rg7 Kf8 19.Rag1 Ne7 20.Rh7 Nd5+–) 18...c5 (18...Ne7 19.Rab1 Nd5 20.Rb4 Nb4 21.Rg1+–) 19.Kd3 (better 19.dc5 Ne7 20.cb6 Nd5 21.Ng5 fg5+–) 19...d6 (19...Ne7 20.dc5 Nd5 21.Ng5 fg5 22.cb6+–) 20.Nd2 Ne7 (20...d5 21.dc5 Nd7 22.cb6+–) 21.Nc4 Rc3 (21...Nd7 22.Na3 Ba3 23.Rg1+–) 22.Rc3 Bc3 23.Kc3 Nd5 (23...cd4 24.ed4 Nd7 25.Nd6 Kg8 26.Rg1 Ng6 27.h4+–) 24.Kd2 Ke7 (24...cd4 25.Nd6 Ke7 26.Nc4+–) 25.Rg1 Nd7 26.Rg7 Ke8 (26...Kd8 27.Nd6 cd4 28.ed4+–) 27.Rh7 (better 27.Nd6 Kd8 28.Rh7 Kc7+–) 27...e5 (27...cd4 28.ed4 Kd8 29.Nd6+–) 28.Nd6 Kd8 29.Nc4 (better 29.e4 Nc7 30.dc5 bc5+–) 29...cd4 30.ed4 e4 (30...ed4 31.Kd3 Nc7 32.Nb6 Nb6 33.Bf6 Kc8 34.Bd4+–) 31.a4 (better 31.Rf7 Nc7 32.Bf6 Nf6 33.Rf6 Kc8+–) 31...f5 32.Be5 f4 33.Bd6 (33.h4!? N7f6 34.Bf6 Nf6+–) 33...N7f6 34.Rg7 f3 35.Ne5 (35.Nb6 e3 36.fe3 f2 37.Nd5 f1Q 38.Nf6 Qf2 39.Kd3 Qf5 40.Kc4 Qf6 41.Be7 Qe7 42.Re7 Kc8 43.b6 Kb8 44.Re8 Kb7 45.Kc5 Ka6 46.Re7 Ka5 47.Ra7) 35...Ne8 36.Nc6 (36.Ra7 e3 37.fe3 Nd6 38.Rd7 Kc8 39.Rd6 Nb4+–) 36...Kc8 37.Rg8 Kd7 38.Be5 Ndc7 39.h4 Ne6 40.h5 N8g7 41.Bg7 Nf4 42.h6 Ng2 43.h7 e3 (43...Nf4 44.Rd8 Ke6 45.h8Q e3 46.fe3 f2 47.Qh6 Kf5 48.Qf4 Kg6 49.Qg4 Kh7 50.Rh8) 44.fe3 f2 (44...Nf4 45.h8Q Ke6 46.Qh6 Ng6 47.Qg6 Kd5 48.Rd8 Kc4 49.Qd3) 45.Rf8 Ne3 (45...Nf4 46.Rf4 f1Q 47.Rf1 Kd6 48.h8Q Ke6 49.Rf6 Kd5 50.Qa8 Kc4 51.Qg8) 46.Ke3 (46.Ke3 f1Q 47.Rf1 Ke6 48.h8Q Kd5 49.Qg8 Kd6 50.Qd8 Ke6 51.d5) 1–0. GuestJGHX – Guestfaqih, freechess.org, 2019.

4.b5 f5 5.Nf3 Nf6 6.Bc4 a6 7.Nc3 ab5 8.Nb5 Nc6 9.Ng5 (9.Bf6 gf6 10.0–0 Na5=) 9...Ra5 (9...Ra4 10.d3=) 10.Qf3 Ng4 11.h3 Qg5 12.hg4 fg4 13.Qe2 Ne5 14.Be5 Qe5 15.d4 Qe4 (15...Qf6 16.e4 Qf4 17.Bd3–+) 16.Rh2 Qc6 17.Kf1 (17.Rb1 Ba6–/+) 17...Be7 (17...Ba6 18.a4–/+) 18.Kg1 (18.Bd3 g3! 19.fg3 0–0 20.Kg1 h6–/+) 18...0–0 19.Bd3 h6 20.c4 g3! 21.fg3 (21.fg3 e5 Combination) 21...e5! 22.d5 (22.de5 Qc5 Decoy) 22...Qc5 23.Rh5 (23.Rb1!?–/+) 23...Bg5–+ 24.Re1 Qe7 0–1. Kellerer,Horst – Kucharkowski,Jens, CiF, 2003.

4.b5 f5 5.Nf3 Nf6 6.Be2 Bd6 7.Ne5 Be5 8.Be5 d6 (worse 8...Bg2 9.Rg1 d6 10.Bb2+–) 9.Bf3 (9.Bb2 0–0 (worse 9...Bg2 10.Rg1+–) 10.0–0 a6=) 9...Bf3 (9...c6 10.Bg3=) 10.Qf3 Nbd7 11.Bb2 (11.Bf6 Nf6 12.0–0 0–0=) 11...0–0 12.0–0 Ne5 (12...a6 13.c4=) 13.Qe2 Qd7 14.f4 Nf7 (14...Ng6 15.a4=) 15.Bf6+= gf6 16.Nc3 Kh8 17.a4 Rg8 18.a5 e5 (better 18...d5!?+–) 19.Nd5+– Qe6?? (better 19...Kg7+–) 20.Nc7 (20.Nc7 Qd7 21.Na8 ba5 22.fe5 de5 23.Qf3+–) 1–0. onur604 (2320) – Panatoly (2085), lichess.org, 2020.

4.b5 f5 5.Qh5 g6 6.Qh3 Nf6 7.Nf3 d6 (7...a6 8.Be2=) 8.Bc4 d5 9.Be2 Nbd7 (9...a6 10.Nd4 Kf7 11.a4+=) 10.0–0 Bg7 11.Ng5 0–0?? (better 11...Nf8+=) 12.Ne6+– Qc8 13.Qh4 (13.Nf8!? Qf8 14.d4 c5+–) 13...Rf7 14.c4 (14.Ng7 Kg7 15.Nc3 c5+–) 14...Ne5?? (better 14...Bh8+–) 15.Ng7 (15.Be5?! Qe6 16.d4 dc4+–) 1–0. DEFFM – GuestSEIN, freechess.org, 2019.

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

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

4.b5 h6 5.Nf3 Nf6 6.Be2 d5 7.0–0 a5 8.c4 dc4 9.Bc4 (9.Na3 c3 10.dc3 Qd1 11.Rad1 Nbd7+=) 9...Bd6= 10.d4 Nbd7 11.Ne5 Qe7 (11...Nd5 12.Nc6 Qh4 13.g3=) 12.Nc6+– Bc6 13.bc6 Nb8 14.Nc3 Nc6?? (better 14...0–0 15.Qf3 Ba3 16.Ba3 Qa3+–) 15.Qf3+– Nd5 (15...Bh2 16.Kh2 Qd6 17.Kg1 0–0+–) 16.Nd5 ed5 17.Bd5 Nd4 (17...0–0 18.Bc6 Rad8 19.e4+–) 18.Bf7! Qf7 19.Qa8 (19.Bd4?! Qf3 20.gf3 0–0=+) 19...Ke7 (19...Kd7 20.Qh8 Bh2 21.Kh1+–) 20.Qh8 Ne2 (20...Bh2 21.Kh1 Be5 22.Qc8+– (22.ed4?? Qh5 23.Kg1 Qh2; 22.Bd4?? Qh5 23.Kg1 Qh2)) 21.Kh1 Bh2 (21...Qh5 22.Qg7 Kd8 23.f4+–) 22.Qg7 Bd6 23.Qg4 h5 24.Qe2 Qf5 25.Rfd1 Qg5 26.Qf3 Qh4 27.Kg1 Qh2 28.Kf1 h4 29.Qf6 Kd7 30.Qf5 Kc6 31.Qd5 Kd7 32.Be5 Qh1 33.Ke2 Qd1 (33...Qg2 34.Qg2 Ke6 35.Bd6 Kf6 36.Qf3 Ke6 37.Qe4 Kf7 38.Qf5 Kg7 39.Rg1 Kh6 40.Bf4) 34.Rd1 (34.Rd1 Kc8 35.Bd6 cd6 36.Qc6 Kb8 37.Rd6 b5 38.Rd7 h3 39.Qb7) 1–0. GuestWGKB – GuestBVMj, freechess.org, 2019.

4.c4 a5 5.b5 Qe7 6.a4 h6 (6...e5 7.Nf3 e4 8.Nd4=) 7.Nf3+= f5 (7...d6 8.d4+=) 8.Be2 Nf6 (8...d6 9.0–0+=) 9.0–0 g5 10.Nc3 Bg7 11.Qc2 (11.Ne5 Rg8+–) 11...d6+= 12.Nd4 (12.d4 g4 13.Nh4 Rg8+=) 12...Nbd7= 13.Bf3 Bf3 14.Nf3 e5 (14...0–0–0!?+=) 15.Qf5+– 0–0 16.Qc2 Nc5 (16...Qe6 17.d3+–) 17.d4+– Nce4?? (better 17...Ncd7+–) 18.de5 (18.Ne4 Rae8+–) 18...de5 (18...Nc3 19.ef6 (19.Bc3?! Ne8+–; 19.Qc3?! Ne4 20.Qd4 Nc5+–) 19...Qf6 20.Nd4+–) 19.Ne4 Ne4 (19...Rfe8 20.Rfd1+–) 20.Qe4 (20.Qe4 Rfe8 21.Rfd1+–) 1–0. RichardSommer (2080) – r0610201 (2100), lichess.org, 2020.

4.c4 c6 5.b5 d5 6.a4 (6.cd5 Qd5 7.Nc3 Qd8=) 6...cb5 7.ab5 dc4 8.Bc4?? (8.Nf3 Nf6=) 8...Bd5 (better 8...Bg2 9.Be6 Bh1 10.Qh5–+) 9.Nf3?? (better 9.Bd5 Qd5 10.Qf3=) 9...Bc4–+ 10.Qc2 Bb5 (better 10...Bd3 11.Qb3–+) 11.Nc3?? (better 11.Nd4 Bd7 12.Qe4–+) 11...Bd7 (11...Bd3 12.Qa4 Qd7 13.Qd7 Nd7 14.Kd1–+) 12.0–0 Bb4 (better 12...a6–+) 13.Na2=+ White fights for the Initiative 13...Ba5 (better 13...Nf6 14.Nb4 a5=+) 14.Bg7+– Ne7 (14...Bc6!? 15.Qd1 Be4+–) 15.Bh8+– Nd5 (better 15...Bb5 16.Qh7 Bd3+–) 16.Qh7 Qe7 (16...Bb5 17.Rfb1 a6 18.Nc3+–) 17.Ne5 (better 17.Bg7 Kd8 18.e4+–) 17...Qf8 (17...Bb5 18.Rfb1 a6 19.Nc3 Nc3 20.dc3+–) 18.Nd7 (better 18.Bg7 Nf6 19.Bf6+–) 18...Nd7 19.Bc3 Bc3 20.Nc3 Nc3 21.dc3 Rc8 (21...a5+–) 22.Ra7 Rc3 (22...Nb8+–) 23.Rd1 Rc8 24.g3 (24.Rad7 Qg7 25.Qg7 Rc2 26.Qf7) 24...Nc5 (24...Ne5+–) 25.h4 b5 (25...Rb8 26.Rc7+–) 26.h5 (26.Rc1 Rd8 27.Rc5 Qe7+–) 26...b4 27.h6 (27.Rc1 Rd8 28.Rc5 b3+–) 27...b3 28.Qg7 b2 29.Qf8 (better 29.Qb2 Qh6 30.Kg2+–) 29...Kf8 30.h7 (better 30.Kg2!? Kg8 31.g4+–) 30...Kg7+– 31.Rb1 (31.Kg2 Kh7 32.Rf7 Kg6+–) 31...Nd3+= 32.Kf1?? (better 32.Kg2 Kh7 33.Rf7 Kg6 34.Rb7+=) 32...Rf8?? (better 32...Rc1 33.Ke2 Rb1 34.Rf7 Kh8–+) 33.Ke2 (33.Rd7 Ne5 34.Rb7 Nc4+–) 33...Nc5 (33...Rd8 34.Ra4 Kh7 35.Rd4 Rd4 36.ed4+–) 34.Rb2 Kh7 (34...Ne4 35.Rbb7 Ng5 36.e4+–) 35.Rc2 (better 35.Rb5 Rc8 36.Rf7 Kg6 37.Rf4+–) 35...Kg6 (35...Ne4+–) 36.Rc5 Rb8 37.Rc4 Rb2 (37...f5 38.Ra6 Re8 39.e4+–) 38.Kf3 Rb3 (38...e5 39.Rc6 Kg7 40.Rcc7 e4 41.Kg2+–) 39.Rcc7 Rb5 40.Rf7 Rb3 (40...Rb4 41.e4 Kg5 42.Ra6 Rb3 43.Kg2 Kh6 44.Re6 Kh5 45.Rf5 Kg4 46.Rg6) 41.Rg7 (41.Ke4!? Rb5+–) 41...Kf5 42.Rh7 Ke5 43.Rae7 (43.Ra5!? Kf6+–) 43…Kd6 (43...Kd6 44.Rd7 Kc6+–; 43...Rb8 44.Rh6 Rf8 45.Kg2+–). RichardSommer (1950) – Kenen777 (1955), lichess.org, 2020.

4.c4 Be4 5.Nc3 (5.Nf3 Nf6 (5...Bb4?? 6.Bg7 f6 7.Bh8+–) 6.a3 a5=) 5...Bb7 (5...Bg6=) 6.Nf3 (6.a3!?=) 6...Bb4=+ 7.Be2 (7.a3 Ba5=+) 7...Bf8 (7...Nf6 8.0–0–/+) 8.Qc2 (8.Rb1 Nf6=+) 8...Nc6 (8...Nf6 9.0–0=+) 9.a3 Qe7 (9...Nf6 10.d4=+) 10.Nb5 (10.d4 a6=) 10...0–0–0 (10...Rc8 11.d4 a6 12.Nc3=+) 11.0–0= a6 12.Nbd4 Nf6 (12...Nd4 13.Bd4 d6 14.a4=) 13.Nc6 Bc6 14.a4 (14.Rab1 d6=) 14...Be4 (better 14...a5=) 15.Ba3?? (15.d3 Bf3 16.Bf3 a5+=) 15...Qe8 (better 15...Bc2 16.Be7 Be7–+) 16.d3 (16.Qc3=) 16...Bc6 (16...Bf3 17.Bf3 Ba3 18.Ra3+=) 17.Nd4 (17.Bf8 Rf8 18.a5 ba5 19.Ra5 d6+–) 17...Bb7 (17...Ba3 18.Nc6 dc6 19.Ra3=) 18.a5 (18.Bf8 Qf8 19.a5 e5+=) 18...Ba3 (18...e5 19.Nb3+=) 19.Ra3 Qe7 (19...e5 20.Nf3+=) 20.Rfa1 (20.Rb3 e5 21.Nf3 e4 22.de4 Be4+–) 20...Qc5 (20...c5 21.Nb3 Qd6 22.ab6 Qb6 23.Bf3 Bf3 24.gf3+–) 21.ab6 Qb6 (21...cb6 22.Bf3 Bf3 23.Nf3+– (worse 23.gf3 a5+=)) 22.Rb1 (22.c5 Qa7+–) 22...Qa7+– 23.Rab3 d5? (better 23...Ba8 24.Qa2 d5+–) 24.Rb7 Qb7 25.Rb7 Kb7 26.Qb3 Ka7 (26...Kc8 27.Nc6 d4 28.Qb8 Kd7 29.Ne5 Kd6 30.Nf7 Kd7 31.Qa7 de3 32.fe3+–) 27.Nc6 Ka8 28.Nd8 (28.d4 Rb8 29.Nb8 Rb8+–) 28...Rd8 29.cd5 (29.d4 Rb8 30.Qa2 Rb6+–) 29...Nd5 30.Qc4 (30.Bf3 g6+–) 30...Rb8 (30...Kb7+–) 31.Qa6 1–0. GuestRZGB – GuestKTVZ, freechess.org, 2016.

4.c4 e6 5.Nf3 Nf6 6.a3 h6 7.Bd3 Bd6 (7...a5 8.b5=) 8.0–0 0–0 9.e4 Bc7 10.e5 Ne8 11.Qc2 a5 12.Nc3 a4 (12...d6!?+=) 13.Na4+– f5 (13...c5 14.bc5 bc5 15.Be2+–) 14.ef6! Nf6 (14...Nf6 15.Ne5 Combination; 14...gf6 15.Rae1 Combination) 15.Rfe1 (15.c5 b5 16.Nc3 Ng4 17.Bh7 Kh8+–) 15...Nh5 16.Ne5 Qg5? (better 16...Nf4 17.Be4 Qg5+–) 17.h4! Qh4?? (17...Qd8 18.Bh7 Kh8 19.Ng6 Kh7 20.Nf8 Kg8+–) 18.Bh7 Kh8 19.Ng6 Kh7 20.Nh4 (20.Nf8 Kg8 21.g3 Qh3–+) 20...Kg8 21.Ng6 Nf4 (21...Rf7 22.Bd4 Ra6 23.b5+–) 22.Nf8 Kf8 23.Qh7 Nd3 (23...Nh5 24.g4 Nf6 25.Bf6 gf6 26.Re6 de6 27.Qc7 Nd7 28.Qd7 Ra4 29.Qb7 e5+–) 24.Bg7 (24.Bg7 Ke7 25.Bh6 Ke8 26.Qg8 Ke7 27.Qf8) 1–0. DEFFM – muhammadmatias, freechess.org, 2017.

4.d4 Bb4–/+ 5.Nd2 d5 6.c4 (6.a3 Bd6–/+) 6...Bd2 7.Qd2 dc4 8.f3 (better is 8.Qc3–/+) 8...Bd5 (better is 8...b5!?–+) 9.e4= Be4 (9...Bc6 10.d5! (10.Bc4?! b5 11.Bd3 Ne7=) 10...Nf6 11.dc6 Qd2 12.Kd2+/–) 10.fe4 Qh4 11.Qf2 (11.Kd1 Qe4 12.Bc4 Nf6+=) 11...Qe4= 12.Be2 (12.Qe2 Qe2 13.Be2 Nf6 14.Bc4 Nd5+=) 12...Nf6 13.Nf3 (better is 13.Rc1=+) 13...h5?? (better is 13...Qc2!? 14.Bf1 Qf2 15.Kf2 b5–/+) 14.0–0 (14.Nd2!? Qg6 15.Nc4+/–) 14...Ng4= 15.Qe1 b5 16.Rf2?? (better is 16.Rd1=) 16...Nf2 (16...Qe3!? 17.Rc1–+) 17.Qf2 Nd7 (17...Qc2 18.Ng5 Qg6 19.Bf3–/+) 18.Re1 (18.Ne5 Ne5 19.de5 Qc2–/+) 18...Qf5 (18...Qc2 19.Ng5 0–0 20.Ba3–+) 19.Rf1 (19.Qg3 0–0–0–/+) 19...Nf6 (19...0–0–+) 20.Ne5 (better is 20.Qg3!? Qg6 21.Qg6 fg6 22.Ne5–/+) 20...Qf2–+ 21.Rf2 a6 (21...Rb8 22.Ba3 a5 23.Bc5–/+) 22.Nc6 (better is 22.Bf3 Rd8 23.Ba3–+) 22...Ne4 23.Rf4 c3 24.Re4 (24.Ba1 f5–+) 24...cb2 25.Bd3 f5 (25...f6 26.Re2 Kd7 27.Na5–+) 26.Re2 (better is 26.Re6!? Kd7 27.Rg6=+) 26...Kd7–+ 27.Ne5 Kd6 28.Rb2 (28.Nf7 Kd5 29.Nh8 Rh8–+) 28...Kd5 29.Nf3 c6 (29...c5 30.dc5 Kc5 31.Rc2 Kd6 32.Rd2–+) 30.Rd2? (30.Rc2 Kd6=+) 30...a5 (30...c5 31.dc5 Kc5 32.Rc2 Kd6 33.Rd2–+) 31.Bc2 (31.Rc2!?=+) 31...a4–/+ 32.Bd3 a3 (32...b4 33.Rc2–/+) 33.Rc2 Rhg8 (33...Ra4!?–/+) 34.Rc5=+ Kd6 35.Ne5 Ra6 (35...Rgc8 36.Nf7 Ke7 37.Ne5=) 36.Nf7 Kd7 37.Ne5 Kd6 38.Nf7 Kd7 ½–½. Hasler – Kupec, corr 3GMM–10, 1996.

4.Ne2 a5 5.b5 Nf6 6.Nf4 Bd6 7.Be2 (7.Nh5 Nh5 8.Qh5 0–0=) 7...h6 (7...c6 8.Na3=) 8.0–0 c6 9.Nh5 Be7 (better 9...Nh5 10.Bh5 cb5=) 10.Ng7+– Kf8 11.Nh5 d5 12.f4 c5 (better 12...Nbd7!?+–) 13.f5+– d4 (13...e5 14.Be5 Rg8+–) 14.fe6 Qd5 (14...Bd5 15.ef7 Kf7+–) 15.Bf3 Ne4 16.ef7 (better 16.d3 Qe6 17.ed4+–) 16...Qf7 (16...Qd7 17.Qe1 Ng5 18.Bb7 Qb7 19.ed4 Rh7 20.dc5 Bc5 21.d4 Be7+–) 17.Be4 Qf1 18.Qf1 (18.Qf1 Ke8 19.Bb7+–) 1–0. Akrapovik – DismasOdinson, lichess.org, 2018.

4.Ne2 Bb4?? 5.Nf4 Bd6?? 6.Bg7+– f6 (6...Be5 7.Be5 f6 8.Qh5 Ke7 9.Qh4+–) 7.Bh8 (better 7.Qh5 Ke7+–) 7...Be5 (7...Qe7+–) 8.Qh5 Ke7 9.Qh7 Kd6 10.Nd3 (better 10.Nc3 Qe8 11.Qd3 Ke7 12.Ng6 Kd8 13.Ne5 fe5 14.Be5+–) 10...Ba1 11.c3 Nc6 (11...e5+–) 12.Qh3?? (better 12.Na3!? e5+–) 12...Qf8 (12...Nh6 13.Qh6 Qh8 14.Qf4 e5+–) 13.Qg3+– Ke7 14.Bg7 (better 14.Qc7!? Na5 15.Qg3+–) 14...Qf7+– 15.Bf6?? (better 15.Qc7 Nd8 16.Qg3+–) 15...Nf6=+ 16.Be2? (better 16.Qc7!? Ba6 17.Na3–/+) 16...Rg8 (16...d6 17.Qh4–+) 17.Qh3 (17.Qc7 Ba6 18.Ne5 Ne5 19.Qe5 Be2 (19...Rg2 20.Ba6 Nd5 21.Rf1+–) 20.Ke2 Rg2–+) 17...Kd8 (17...e5 18.a3–+) 18.0–0 (18.Na3 e5 19.Qh4–+) 18...Kc8 (better 18...e5–+) 19.Na3–/+ Qe7 (19...Nd4 20.cd4 Qh7 21.Qh7 A) 21...Nh7?? 22.f3+– (22.Ra1?! Rg2 23.Kf1 Rh2+–); B) 21...Rg2 22.Kh1 Rf2 (worse 22...Nh7 23.Nf4 Rf2 24.Kg1 Rf1 25.Kf1=) 23.e4 B1) 23...Nh7 24.Nf2 (24.Rf2?! Be4 25.Rg2 Bd4+–) 24...Bd4 25.d3+–; B2) 23...Rf1 24.Bf1 Nh7–/+) 20.Nb5?? (better 20.Nc2 Bc3 21.dc3=) 20...a6–+ 21.Nd4?? (better 21.Ra1 ab5 22.Qh4–+) 21...Nd4 22.ed4 (22.cd4 Qh7 23.Qh7 Rg2 24.Kh1 Rf2 25.d5 Rf1 26.Bf1 Nh7 27.Bg2 ed5 28.Kg1–+) 22...Qg7 (better 22...Qh7 23.Qg3 Rg3 24.fg3 Qe4–+) 23.Nf4?? (23.Bf3 Bc3 24.Bb7 Kb7 25.dc3 Ne4+=) 23...Rh8?? (better 23...Qg5 24.Qg3 Qf5–+) 24.Qg3+– Qh6 25.Bf3?? (25.Ra1 Rg8 26.Qe3 Rh8+–) 25...Rg8?? (25...Bf3 26.Ra1 Ne4 27.Qh3 Qh3 28.Nh3–+ (28.gh3?? Nd2 29.Ne2 Be2–+)) 26.Qh3?? (better 26.Bb7 Kb7 27.Qf3 Ka7 28.Ra1+=) 26...Qf4–+ 27.Ra1 (27.Bb7 Kb7 28.Ra1 Qd2–+) 27...Qd2 (better 27...Bf3 28.g3 Bc6–+) 28.Bb7 Kb7 29.Qf3 (29.Qe3 Qe3 30.fe3–+) 29...Ka7 (better 29...Nd5–+) 30.Qf6–/+ Qc3 31.Rf1 (better 31.Rd1 Qh3 32.g3–/+) 31...Qc6 (31...Qh3! 32.g3 Rh8–+) 32.f3 (32.g3 Kb7=+) 32...Qd5 (32...Qc2 33.g3–/+) 33.Rc1 (33.Qf4 Kb8=+) 33...c6 (33...Qa2 34.g3 Kb7 35.Qf4–/+) 34.Rd1 (34.Rc2!?=+) 34...Qa2–/+ 35.g3 Qa4 36.Rf1 Qc4 37.Qf7? (37.Qe5 Kb7–/+) 37...Rd8 (37...Qd4 38.Kh1 Rg7 39.Qf8–+) 38.Kg2? (better 38.Qf6 Rb8 39.Qe5–/+) 38...Qe2?? (better 38...Qd4 39.Rf2 Rh8–+) 39.Rf2= Qe3 (better 39...Qc4!? 40.Qe7 Rb8 41.Qd7 Rb7=) 40.Qe7+– Rb8 (40...Rc8 41.Qd7 Kb8 42.Rb2+–) 41.Qd7 Rb7 42.Qc6 Qd4 43.Rc2 (43.Qe6!? Rc7 44.f4+–) 43...Qd5 44.Qc3 Rd7. Akrapovik – identMODe, lichess.org, 2018.

4.Ne2 Bb4?? 5.Bg7 Nf6 6.Bh8 +–.

4.Ne2 h6 5.Ng3 Nf6 6.b5 Bb4 7.c4 (7.Nh5 Rg8=) 7...h5 (7...a6 8.Nh5 Nh5 9.Qh5=) 8.a3 Bc5 9.Bf6 Qf6 10.Nc3 a6 (10...Qg6 11.f3=) 11.Nh5 Qg5 12.Ng3 ab5 13.cb5 (13.Nb5 Kd8 14.d4+=) 13...d6 (13...Ba3!? 14.Qb3 Qe7=+) 14.Qc2 (14.d4 Ba3 15.Qb3 Bb4 16.Ra8 Bc3 17.Qc3 Ba8 18.Qc7 Qd8 19.Qd8 Kd8+–) 14...Nd7 (14...d5 15.Qb2+=) 15.Nce4 Qe5 (15...Be4 16.Ne4 Qf5 17.Ra2+=) 16.Nc3 (better 16.d4 Bb4 17.Kd1 Be4 18.Ne4 (18.de5?! Bc2 19.Kc2 Ne5=) 18...Qh5 19.Be2+–) 16...0–0–0?? (16...Ra5 17.a4+=) 17.d4?? (better 17.Nge2+–) 17...Bd4=+ 18.Rc1 Bc3 19.Qc3 Qd5?? (better 19...Nc5=) 20.Qc7 1–0. aravind555 – sainachess007, lichess.org, 2019.

4.f3 f6 5.a3= Na6 6.Bd3 c5 7.bc5 Nc5 8.Nc3 (8.Be2 Na4 9.Bc1 Bd6=) 8...Nd3=+ 9.cd3 Bd6 10.Nge2 Ne7 11.e4 0–0 12.Nb5 Bc7 13.Qc2 (13.Nc7 Qc7 14.Rc1 Qd6=) 13...Bc6 14.Nbd4 Bb7 (14...Rc8 15.Qb3=+) 15.0–0 (15.Nb5 Bb8=+) 15...a6 16.Ng3 (16.Qb3 Rf7=+) 16...Bg3–/+ 17.hg3 Rc8 18.Qd1 (18.Qb3 Rf7–/+) 18...e5 19.Ne2 Kh8 (19...d5 20.Qb3–/+) 20.Kf2 (20.d4 d5–/+) 20...h6 (20...d5 21.g4–/+) 21.Rh1 Ng6 22.d4 d6 23.d5 f5 24.d3 f4 (24...Kg8 25.Ke1=+) 25.g4 (25.gf4 Nf4 26.Nf4 Rf4+=) 25...Nh4 (25...Kg8 26.d4=) 26.Rh2 a5 (26...Kg8 27.d4 Ng6 28.Qb3=) 27.Qh1+= g5 28.d4 (better 28.Rc1!?+=) 28...Rc2=+ 29.Rb1? (29.Qb1 Qc7 30.Rh4 gh4 31.Qa2–+) 29...Ba6–+ 30.de5? (30.Qd1 Re2 31.Kg1–+) 30...Re2 (30...Be2?! 31.Kg1–+) 31.Kg1 Qc8 (better 31...Bd3 32.Rh4 gh4 (32...Bb1 33.Rh6 Kg7 34.Rh7 Kg8 35.Rh8 Kf7 36.Qh5 Ke7 37.Rh7 Rf7 38.Qf7) 33.ed6 Kg8–+) 32.ed6 (32.Rh4 Qc5 (32...gh4 33.Qh4 Kg8 34.Qh5 Qc5 35.Kh1=) 33.Kh2 gh4 34.ed6 Kg8–+) 32...Kg8 (better 32...Rb2 33.Rh4 Rb1 34.Kh2 Rh1 35.Kh1 gh4 36.Kh2 Qc2 37.Kg1 Bf1 38.Kf1 Qd1 39.Kf2 Rc8 40.e5 Rc2) 33.g3 (33.Rh4 Qc5 34.Kh2 gh4 35.Qg1 Qg1 36.Kg1–+) 33...Nf3! 34.Kf1 (34.Qf3 Qc5 Double attack) 34…Rh2 0–1. alt20 – _dexter_, lichess.org, 2015.

4.Nf3 Bd6 5.Bg7 Qe7 6.Bh8 f6 7.b5 c6 (7...h6 8.e4! Be4 9.d3+–) 8.c4 a6 9.Nc3 Nh6 (9...ab5 10.cb5 Bb4 11.bc6 Nc6 12.Nb5+–) 10.Nh4 (10.Ne4 Ng8 11.Nd6 Qd6 12.ba6 Ra6+–) 10...Be5 (10...Qf8 11.Qh5 Kd8 12.Bd3+–) 11.Qh5 Nf7 12.Qh7 d5 (12...Kd8 13.Ng6 Qe8 14.Ne5 fe5 15.Bf6 Kc7+–) 13.Ng6 Qb4 14.Ne5 (better 14.Qg8 Kd7 15.Qf7 Kc8 16.Ne5+–) 14...fe5 15.Be5! Nd7 (15...Ne5 16.Qg7 Double attack (16.Qb7 Pinning; 16.Qb7 Deflection; 16.Qg7 Decoy)) 16.Bg3 (better 16.ba6 Ba6 17.Rb1+–) 16...0–0–0 (16...ab5 17.Qg8 Qf8 18.Qf8 Kf8 19.cb5 c5+–) 17.Qf7 e5 18.bc6 Bc6 19.cd5 Bb7 20.Be2 (better 20.Qe6 Kb8 21.Rb1+–) 20...e4 21.0–0 (21.Na4 Ne5 22.Be5 Qd6 23.Bg4 Rd7 24.Bd6 Bc6 25.Qf8 Kb7 26.Qb8) 21...Rf8 22.Qe6 Kd8 23.Bh4 (23.Bg4 Qe7 24.Bc7 Kc7 25.Qe7 Kb8 26.Bd7 Ka7 27.Qf8 b5 28.Qc5 Ka8 29.Bc6 Bc6 30.dc6 Kb8 31.Qb6 Kc8 32.Qb7 Kd8 33.Qd7) 23...Kc7 24.Rfc1 Kb8 25.Qd7 Rh8 26.Bg3 Ka8 27.Rcb1 Qc5 28.Ne4 (28.Na4 Bc8 29.Qg7 Rh7 30.Qh7 Qc7 31.Qc7 Bd7 32.Nb6) 28...Qd5 29.Bf3 (better 29.Qd5 Bd5 30.Nf6 Bc4 31.Bc4 Ka7+–) 29...Qd7 30.Rb6 Ka7 31.Rab1 Be4 32.Be4 Qd2 (32...Qc7 33.Rb7 Qb7 34.Rb7 Ka8 35.Rd7) 33.Rb7 Ka8 34.Rd7 (34.Rd7 Qd5 35.Bd5) 1–0. Abdullaevich (1815) – zimm (1800), lichess.org, 2019.

4.Nf3 Be7?? 5.Bg7 Bf6 6.Bh8 Ba1 7.Ba1 Nf6 8.Bf6 (8.a3 d6+–) 8...Qf6 9.Be2 Nc6 10.a3 0–0–0 11.d4 Rg8 12.g3 Ne7 13.c4 e5 14.de5 Qf5 15.Nc3 Ng6 16.Nd5 c6 17.Bd3 Qh5 18.Bg6 fg6 19.Ne7 Kc7 20.Ng8 c5 21.Nf6 Qf5 22.Qd7! Qd7 23.Nd7 Kd7 24.Ke2 g5 25.h3 h5 26.Rd1 Ke6 27.Rd6 Kf5 28.Rf6 Ke4 29.Ng5 Ke5 30.Rf7 cb4 31.ab4 Ba6 32.b5 Bc8 33.Ra7 Kf5 34.h4 Ke5 35.Ra8 Bb7 36.Rb8 1–0. Fournier,Frederic (1705) – parlay, Active, 2007.

4.Nf3 Be7?? 5.Bg7 Bf6 6.Bh8 Bh8 7.d4 Ne7 8.c4 (8.Bd3 h6+–) 8...d6 (8...c5 9.bc5 bc5 10.Nbd2 Bf3 11.Qf3+–) 9.Bd3 Ng6 10.Nbd2 (10.Nc3 c5+–) 10...Na6 (10...c5 11.Be4 Be4 12.Ne4+–) 11.a3 (11.b5 Nb8+–) 11...c5 12.0–0 (12.Qa4 Qd7 13.Qd7 Kd7+–) 12...cb4 (12...f5 13.Rb1+–) 13.ab4 (13.Qa4 Qd7 14.ab4 Nc7+–) 13...Nc7 (13...Nb4 14.Qa4 Nc6 15.d5+–) 14.Qa4 (14.Be4 d5 15.Bd3 dc4 16.Nc4 Qe7+–) 14...Kf8 (14...Qd7 15.Ng5 f5 16.Qd7 Kd7 17.Nh7+–) 15.c5 (15.Be4 d5 16.Bg6 hg6+–) 15...dc5 16.bc5 bc5 17.Qa3 Qe7 18.Rfc1 (18.dc5?! Ba1 19.Ra1 Kg8+–) 18...Bf6 (18...c4 19.Qa5+–) 19.Rc5 (19.Rc5 Kg7 20.Ne4+–) 1–0. Hilbert,Stephan J – Klawitter,Bernd, FICGS, 2015.

4.Nf3 g6?? 5.Bh8 f6 6.Be2 (6.e4 Bb4 7.a3 Be7+–) 6...Bh6 (6...Nh6+–) 7.0–0 (better is 7.Qc1!? Kf7 8.Qb2 e5+–) 7...Kf7 8.c4 (8.g4!? g5+–) 8...Ne7 9.Bf6! Kf6 10.Qb3 Be4 11.Nc3 Bb7 12.Qb2 Kf7 13.Ne5 Ke8 14.d4 d6 15.Bf3 Bf3 16.Nf3 (16.gf3?! de5 17.de5 Nf5+=) 16...Nd7 17.Ne4 Qc8 18.Neg5 Nf6 19.d5 Bg5 (19...e5 20.b5+–) 20.Ng5 Nfg8 (20...e5 21.f4 Nd7 22.fe5 de5 23.Nf7+–) 21.Ne6 c6 22.Qg7 Kd7 (22...h6 23.b5 c5 24.e4+–) 23.e4 (23.b5 c5+–) 23...Qa6 24.Nf8 Kc7 25.Rfc1 Qa3 26.Nh7 Qb4 27.Nf8 Qd2 28.e5 Qf4 (28...Qh6 29.Ne6 Kd7+–) 29.Ne6 1–0. mikebaldini (1660) – macaronigrill, gameknot.com, 2013.

4.Nf3 Nh6 5.c4 Nc6 6.b5 Na5 7.Be2 d5 8.0–0 (8.cd5 ed5 9.Qa4 c6+=) 8...dc4 (better 8...Nc4!? 9.Bc3 a6=+) 9.Bc3+= f6 (9...a6!? 10.Ba5 ba5 11.Bc4 ab5 12.Bb5 c6=) 10.Ba5+– ba5 11.Bc4 Bd5 (11...a6 12.Nd4 e5 13.Qa4+–) 12.Qb3 (12.Bd5!? Qd5 13.Qa4+–) 12...Bf3 13.gf3 e5 (13...Rb8 14.Be6 c6 15.a4+–) 14.Nc3 (14.Bd5 Rb8+–) 14...c6 (14...Bb4!?+–) 15.bc6+– Rb8?? (better 15...Bb4+–) 16.Qa4 Qc7 (16...Rb4 17.c7 Ra4 18.cd8Q (18.cd8B?! Rc4 19.Ba5 Rc5+=) 18...Kd8 19.Na4+–) 17.Nd5 (17.Nd5 Bd6 18.Nc7 Bc7 19.Rab1 Rb1 20.Rb1 Nf5 21.Rb7 Nh4 22.Rc7 Nf3 23.Kh1 Kd8 24.Rd7 Kc8 25.Qb3 Nh2 26.Qb7) 1–0. aravind555 – Rigels, lichess.org, 2018.

4.Qg4 d5 5.Bb5 (5.Bg7 Nf6 6.Bf6 Qf6+=) 5...Nc6 (5...c6 6.Be2=+ (6.Bg7? Nf6 7.Bf6 Qf6–+)) 6.a4 (6.Bg7!? Nf6 7.Bf6 Qf6 8.Nc3+=) 6...Nf6=+ 7.Bf6 Qf6 8.Nc3 (8.c3 a5=+) 8...a6 (8...h5 9.Qg3 Bd6–/+ (9...Bb4?! 10.Qc7 0–0 11.Nge2=+)) 9.Bc6=+ Bc6 10.Qd1?? (better 10.Rb1=+) 10...Bb4 (better 10...d4 11.Nge2 dc3 12.dc3 Rd8–+) 11.Nce2 0–0 12.Nd4 Rfe8?? (better 12...Bd7–+) 13.Nc6+– Bc5 (13...Bd6 14.Nf3+–) 14.Rb1 (better 14.d4!? Bd6 15.Nf3+–) 14...Qg6+– 15.g3 Qf6? (better 15...e5!? 16.Nb4 Bb4 17.Rb4 c5+–) 16.d4 Bd6 17.a5 b5 18.Nb4 (18.Qf3 Qg6 19.Qe2 Qf6+–) 18...Rac8 (18...Bb4 19.Rb4 c5 20.Rb3+–) 19.Nd3 (19.c3 c5 20.Na6 cd4 21.Qd4 Be5+–) 19...c6 20.Nf3 Qe7 21.0–0 f6 22.Nh4 Qf7 23.Nf4?? (23.Re1 Qc7+–) 23...Bf4 (better 23...g5=) 24.ef4+– Red8 25.Re1 Rc7 (25...Re8+–) 26.Re3 Re8. atif_zubair – sayin, lichess.org, 2019.

4.h3 Bb4?? 5.Bg7 Qg5 6.Bh8 Bg2 7.Nf3 Bf3 8.Qf3 +–.

4.Nh3 Bb4?? 5.Bg7 Nf6 6.Bh8 +–.

4.Nh3 Qe7 5.a3= a6 6.Nf4 (6.Nc3 Nf6=) 6...h6 (6...e5 7.Nd3 Nc6 8.Be2=) 7.Qg4 (7.Be2 e5 8.Nd3 Bg2=) 7...Nc6 (7...Nf6!? 8.Qe2 e5=) 8.Bg7+= Rh7 (8...Nf6 9.Bf8 Rf8 10.Qh4+=) 9.Bb2 (9.Bf8 Qf8 10.d4 Nf6+/–) 9...Nf6+= 10.Qg3 (10.Bf6 Qf6 11.d4 0–0–0+=) 10...0–0–0 (10...e5 11.Nd3 Bg7 12.Be2+=) 11.b5+/– ab5 12.Bb5 Ne4 (12...e5 13.Qh4+=) 13.Qg8 f5 14.f3 Nd6 15.Nh5?? e5?? 16.Qb3 Qh4=+ 17.Ng3 f4 18.Rf1?? fg3–+ 19.hg3 Qg3 20.Rf2 e4 21.f4 Na5 22.Qa4 h5 23.c4? h4 24.c5 Nf5 25.cb6 cb6 26.Nc3 Ne3 27.de3 Qe3 28.Ne2 Bc5 29.Rf1 h3 30.gh3=+ Rh3 31.Rc1 d6?? 32.Bd4 Qa3–+ 33.Qc2?? Qb4 34.Nc3 Qd4 35.Ne4 Qe4 36.Be2 Qb4 37.Kd1 Be4 38.Qa2 Kb7 39.Qf7 (39...Kb8 40.Bc4–+). abhijit – maf (1690), net–chess.com, 2002.

4.Nh3 Nf6 5.b5 =+.

4.Qh5 Nf6 (4...Bb4?? 5.Bg7 Nf6 6.Qh4+–) 5.Qh3 (5.Qh4 Be7=+) 5...g6 (5...Bb4 6.Nf3–/+) 6.a4 (6.a3 a5=) 6...Bg7 (6...Bb4!? 7.Nf3 a6–/+) 7.b5 0–0 8.Bd3 Bd5 9.Ra3 c6?? (better 9...a6=) 10.Bf6 (10.c4!? cb5 11.cd5 b4 12.Bf6 Qf6+–) 10...Qf6+– 11.Ne2?? (better 11.c4 Bc4 12.Bc4 cb5 13.ab5+=) 11...Qb2–/+ 12.0–0 cb5 13.ab5 a6 14.ba6 Na6?? (better 14...Ba2 15.Qf3 d5=) 15.Ra6+– (15.Ba6?! Ra6 16.Ra6 Bc4+–) 15...Ra6 16.Ba6 Qa2 (16...Qc2 17.d4+–) 17.Bd3 e5 (17...Bc6 18.Nbc3 Qa7 19.Nd4+–) 18.Nbc3 Qa5 (18...Qa8 19.Nd5 Qd5 20.Nc3+–) 19.Qd7 Be6 20.Qc7 Qd5 (20...Qc5 21.Qa7 Qc6+–) 21.Nd5 Bd5 22.Qb6 Be6 23.Bg6! Rc8 (23...fg6 24.Qe6 Deflection (24.Qe6 Overloading); 23...hg6 24.Nc3 Combination) 24.Qb7 (better 24.Be4 Bg4 25.Nc3 Kh8+–) 24...fg6 (24...hg6 25.c3 Rd8+–) 25.Qc8! Bc8 26.Ng3 Kf7 27.Ra1 Ke6 (27...g5 28.Ra7 Kg6 29.c4+–) 28.Ne4 Bd7 (28...Bf8 29.Ra8 Kd7 30.Ra7 Kc6 31.Rh7+–) 29.f3 (29.Nc5 Kd6 30.Nd7 h5+–) 29...Ke7 (29...Kd5+–) 30.Ra7 Kd8 31.Rd7! Kd7 32.Nc5 Kc6 (32...Kc6 33.Ne6 Bf6+–). atif_zubair – MintZ, lichess.org, 2019.

4.b5 a6

5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.bc6 dc6 9.Nf3=.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.Nf3 Be7?? (better 8...Nf6=) 9.Bg7+– Bf6 10.Bh8 Bh8 11.Bd3 (11.d4 cd4 12.ed4 Qc7+–) 11...d5 (11...Nf6 12.0–0+–) 12.Bh7 Nf6 13.Ng5 (13.Bd3 c4 14.Be2 Ne4+–) 13...c4?? (better 13...Nh7 14.Ne6! Qd7+–) 14.Qf3+– Nbd7 15.Qh3 (15.Qf4 e5 16.Qf3 Qe7+–) 15...Ke7 (15...Bg7 16.d4+–) 16.Bg6 (16.d4 cd3 17.cd3 d4 18.ed4 Qc7+–) 16...fg6 (16...Qg8 17.Nf7 Qg6 18.Nh8 Qc2+–) 17.Qe6 (17.Qe6 Kf8 18.Qf7) 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 cb5 9.cb5 d5 10.Nf3 Nd7 (10...Nf6 11.Be2=) 11.Qc2 Qa8 (11...Ngf6 12.d4=) 12.Bd4 Nc5 (12...Ngf6 13.Be2=) 13.Bd3 Ne7 (13...Nf6 14.0–0=) 14.Bc5 bc5 15.Qc5 Nf5 (15...Nc6 16.Qb6 Nb4 17.Qd4+=) 16.Qc2 (better 16.Qc7 Bd6 17.Qc3+–) 16...Qa1? (better 16...Nd6!?+–) 17.Bf5+– ef5 18.0–0 Bd6 19.Nc3 (19.Qf5 g6 20.Qd3 Qa4+–) 19...Qa7 (19...Qa8 20.Qf5 d4 21.Ng5+–) 20.Qf5 0–0 21.Nd5 Qc5 (21...Rd8 22.Nc3 Bf3 23.Qf3+–) 22.Ng5 g6 23.Qh3 h5 24.Ne4 Qd5 (24...Qa3 25.Ndf6 Kg7+–) 25.Nf6 Kg7 26.Nd5 Bd5 27.Qd7 Bc4 28.b6 (better 28.Rc1 Bb5 29.Qd6 Kg8+–) 28...Bf1 29.Qd6 Ba6 30.Qe5 (30.f3 f6+–) 30...Kg8 (30...f6 31.Qd6+–) 31.Qe7 Rb8 (31...Rc8 32.h4 Rc4+–) 32.Qa7 Rc8 33.Qa6 Rc1 34.Qf1! Rf1 35.Kf1 Kf8 36.b7 Ke7 37.b8Q f5 1–0. DEFFM – GuestGRMP, freechess.org, 2018.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 cb5 9.cb5 Nf6 10.Nf3 Be7 11.Be2 0–0 12.0–0 d5 13.d4 Nbd7 14.Nbd2 Bb4 15.Qb3 Bd2 16.Nd2 Qe7 17.Bb2 Rc8 18.Ba3 Qd8 19.Bd6 Ne4 20.Ne4 de4 21.Ra1 Nf6 22.Be5 Bd5 23.Qb4 Rc2 24.Bf1 Nd7 25.Qd6 Qc8 26.h3 Ne5 (26...h6 27.Bg3+=) 27.de5+– (27.Qe5?! Qd8=) 27...g6 28.Qb6 Kg7 29.Qd6 (29.Qa7 Qd8 30.Qa4 Qc7+–) 29...Rc1 (better 29...Qc3 30.Rd1 Rb2=) 30.Qa3 Ra1 31.Qa1 Bc4?? (31...Qc7 32.Qb2+–) 32.b6 (better 32.Qc3+–) 32...Bf1 (32...Bd3 33.Qb2 Qb7 34.Qd4+–) 33.Kf1 Qb8 (33...h5 34.Kg1 h4 35.Kh2+–) 34.Qa7 Qd8 (34...Qc8 35.g3 Qc5+–) 35.Kg1 1–0. GuestWJCL – GreyWolfe, freechess.org, 2017.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 Bc5?? 9.Bg7+– Nf6 (9...cb5 10.cb5 Nf6 11.Bh8+–) 10.Bh8 Be7 (10...cb5 11.cb5 d5 12.Nf3+–) 11.Nc3 1–0. GuestBHFS – GuestDZKZ, freechess.org, 2020.

4.b5 c5

5.Nf3 a6 6.Nc3+=.

5.Nf3 d6 6.d4 (6.Be2 a6+=) 6...Nd7 7.Bd3 Ngf6 (7...cd4 8.ed4 (< 8.Bd4 e5–/+) 8...Qf6 9.Nbd2+=) 8.0–0= Be7 9.c4 (9.Nbd2 0–0+=) 9...d5 (9...0–0 10.Nc3=) 10.cd5 (10.Nc3 cd4 11.Nd4 dc4 12.Bc4 Ne5+=) 10...Bd5 11.Qe2 (11.Nc3 c4 12.e4 cd3 13.ed5 ed5 14.Qd3 Rc8+=) 11...Bf3 (11...Rc8 12.e4 Bb7 13.dc5 bc5 14.Nc3+=) 12.Qf3+= 0–0 (12...Rc8 13.Nd2+=) 13.Nc3 (13.Rd1 cd4 14.Bd4 e5+/–) 13...Rc8 14.Rac1 c4 (14...cd4 15.ed4 Re8 16.Rfe1+=) 15.Be2+/– Rc7 16.Rc2 Qb8 (16...Bd6 17.Nb1+/–) 17.Nb1 Bd6 (17...a6 18.Rc4 (< 18.Bc4 ab5 19.Bd3 Rc2 20.Bc2 Qa8+=) 18...ab5 19.Rc7 Qc7 20.Bb5+/–) 18.h3 (18.Rfc1 a6 19.Ba3 Ne8 20.Bc4 Bh2 21.Kh2 Rc4 22.Qg3 Rc2 23.Rc2 Qg3 24.Kg3 ab5+–) 18...Rfc8 (18...a6 19.Rc4 ab5 20.Rc7 Qc7 21.Bb5+/–) 19.Rfc1 Nd5 (19...a6 20.Rc4 ab5 21.Rc7 Rc7 22.Bb5 Rc1 23.Bc1+/–) 20.Bc4 N7f6 21.a3 a6 (21...Qb7 22.Nd2+/–) 22.ba6+– b5 23.Bd3 Rc2 24.Rc2 Rc2 25.Bc2 Qc8 (25...Qb6 26.e4 Qa5 27.Qe2+–) 26.a7 Qc2? (26...Qa8 27.Nc3 Qa7 28.Nb5 Qb6+–) 27.a8Q Bf8 28.Nc3 Nc3 29.Bc3 Qc3 30.Qfb7 h6 (30...Qa1 31.Kh2 Qa3 32.Qa3 Ba3 33.Qb5+–) 31.Qe7 (31.Qaa7 Qe1 32.Kh2 Bd6 33.g3 Qf2 34.Qg2 Bg3 35.Kh1 Qe3 36.Qaa8 Kh7+=) 31...Nh7 32.g3 (32.Qb4 Qc1 33.Kh2 Qf1+–) 32...g6 (32...Qe1 33.Kg2 Qb1 34.Qae8 Qe4 35.Kg1 Qb1 36.Kh2+–) 33.Qae8 1–0. Baerschneider – Kupec, corr 3GMM–09, 1995.

4.b5 c6

5.a4 cb5 6.ab5 Bd6 7.Nf3 f6 (7...Nf6 8.Be2+=) 8.c4 Qc7 9.d4 Ne7 10.Qb3 (10.Bd3 0–0+=) 10...0–0 11.Nc3 Kh8 12.Bd3 Bf3 13.gf3 Qb7?? (better 13...f5+=) 14.Be4+– Nbc6 15.bc6 dc6 16.c5 Bc7 17.Qc2 (better 17.Qe6 bc5 18.Rb1+–) 17...f5 18.Bd3 Qb8 (18...bc5 19.dc5 Rfb8 20.Nd1+–) 19.e4 Bh2 (19...b5 20.Qb3 Ng6 21.Ra6+– (21.Qe6?! Nf4 22.Qc6 Nd3 23.Ke2 Nb2=+)) 20.ef5 (better 20.cb6!? Bd6 21.ba7 Ra7 22.Ra7 Qa7+–) 20...ef5 (20...Nf5 21.Ne2 bc5 22.dc5+–) 21.cb6 ab6?? (21...Bd6 22.ba7 Ra7+–) 22.Ra8 Qa8 23.Rh2 Ng6 (23...Qa5+–) 24.Bf5 Re8 (24...Qb8 25.Rh5 Qe8 26.Ne2+–) 25.Kd1 Kg8 (25...Nf8 26.Bh7 Qb8 27.Rh5+–) 26.Qb3 Kf8 27.Rh7 (27.Rh7 Qa6 28.Nb5+–) 1–0. AhmedSultanov – Paraguay5, lichess.org, 2019.

5.a4 cb5 6.ab5 Nf6 7.Nf3 Ne4 8.Be2 (8.Nc3 Nc3 9.Bc3 f6+=) 8...a6 (8...Be7 9.0–0 0–0 10.d3+=) 9.0–0 (9.ba6 Ba6 10.d3 Nf6+=) 9...ab5 10.Ra8 Ba8 11.Bb5 Bc6 12.Qe2 Ng5 (12...Nd6 13.Bd3+=) 13.Nd4 f6 (13...Ne4 14.Nc3+=) 14.Nc6 Nc6 (14...dc6 15.f4 Nf7 16.Bc4+–) 15.f4 (15.c4 Bb4+–) 15...Ne4 (15...Nf7 16.Nc3+–) 16.Qh5 g6 (16...Ke7 17.Ba3 Nd6 18.Nc3+–) 17.Qf3 f5?? (better 17...Na7 18.Bd7! Qd7 19.Qe4 Bg7+–) 18.Bh8+– Bc5 (18...Qc7 19.c4+–) 19.d3 (better 19.Bc6 dc6 20.d3 Kd7+–) 19...Nf6 (19...Na7 20.Ba6 Nd6 21.Bg7+–) 20.Bc6 (better 20.Bf6 Qf6 21.Bc6 dc6+–) 20...Kf7 (20...dc6 21.Bf6 Qf6 22.d4+–) 21.Bf6 Kf6 22.Bb5 Qc7 23.d4 Bb4 (23...Be7 24.e4+–) 24.e4 (better 24.Qa8 d5+–) 24...Bd6 (24...fe4 25.Qe4 Kf7 26.c4+–) 25.e5 Be5 26.fe5 Kf7 27.Qh3 (27.Qa8 Kg7+–) 27...h5 28.Qh4 Qc2 29.Qf6 Ke8 30.Qe6 Kf8 31.Qg6 Ke7 (31...Qe4 32.Bc4 Qe3 33.Kh1 Ke7 34.Qf6 Ke8 35.Bf7 Kf8 36.Be6 Ke8 37.Qf7 Kd8 38.Qd7) 32.Qf6 Ke8 33.e6 Qe2 (33...Qc6 34.Bc6 dc6 35.Qf7 Kd8 36.Qd7) 34.ed7 1–0. DEFFM – GuestCPYN, freechess.org, 2018.

4.b5 d5

5.d4 Nd7 6.Nf3 Qe7 7.a4 f5 8.Nbd2 g5 9.h3 h5 10.c4 dc4 11.Nc4 Bg7 12.Qb3 g4 13.hg4 fg4 14.Nfe5 Ne5 15.Ne5 Be5 16.de5 0–0–0 17.Rd1 Rd1 18.Kd1 Nh6 19.Rh5 Rd8 20.Ke1 Nf5 21.Bd3 g3 22.Bf5 gf2 23.Kf2 ef5 24.Rf5 Rd2 25.Ke1 Rg2 26.Rf6 Rg4 27.Qd1 Qb4 28.Qd2 Rg1 29.Ke2 Rg2 30.Rf2 Rf2 31.Kf2 Qd2 0–1. popovicigelu – profutm, kurnik, 2012.

5.Nf3 Be7?? 6.c4?? (6.Bg7 Bf6 7.Bh8 Bh8+–) 6...Nh6?? (better is 6...Nf6=) 7.Bg7+– Rg8 8.Bh6 dc4 9.Bc4 Bf6 10.Nc3 Bd5? 11.Bd5 ed5 12.d4 Qd6 13.Bf4 Qb4 14.Qb3 Qb3 15.ab3 Rg2 16.Ke2 Nd7 17.Nd5 Bh8 18.Nc7 Ke7 19.Na8 h5 20.Ra7 Rg8 21.Nb6 Rc8 22.Rc7 Rc7 23.Bc7 Nb6 24.Bb6 1–0. olawoj – grzegorz4444, kurnik, 2012.

5.Nf3 f6 6.Be2 Ne7 7.0–0 Ng6 8.a3 Bd6 9.c4 0–0 10.d4 dc4 11.Bc4 Qe7 12.d5 e5 13.e4 Bc8 14.h3 Nf4 15.Nc3 Qf7 16.Ne2 Nh5 17.Nh2 Qg6 18.Nc3?? (better is 18.Qd3=) 18...Bh3–+ 19.Qf3 Nf4 20.Ne2 Bg2?? (better is 20...Ng2 21.Qh3 Ne3 22.Qg3 Qg3 23.Ng3 Nc4–+) 21.Qg3?? (better is 21.Nf4 Qe4 22.Qe4 Be4 23.Ne6+=) 21...Ne2 22.Be2 Be4 23.Rad1 Nd7 24.Bd3 Nc5 25.Be4 Qe4 26.Rfe1 Qf5 27.Qg4 Qg4 28.Ng4 h5 29.Ne3 f5 30.Nc4 g5 31.Be5 Be5 32.Ne5 Ne4 33.Nd7 Rfd8 34.Ne5 Kg7 35.Nc6 Rh8 36.f3 Nc3 37.Rd3 Nb5 38.a4 Nd6 39.Re7 Nf7 40.Rc7 h4 41.Ne5 Raf8?? 42.Kg2 Kf6 43.Nd7+/– Kg7 44.Nf8 Rf8 45.Ra7 g4? 46.fg4+– fg4 47.d6 Rd8 48.d7 Ne5+= 49.Rd5 Kf6 50.Rb7 Ke6 51.Rb5 Nd7 52.Rh5 h3 53.Kg3 Nf6 54.Rh6?? Kf5–/+ 55.Rb6 Rd3 56.Kh4+= Ne4 57.Rh5 Kf4 (57...Kf4 58.Rb4 h2 59.Re4 Ke4 60.Kg4 Ra3=) 0–1. cogit – ionbruma, kurnik, 2012.

5.f4 Nd7 6.Nf3 Nc5 7.c4 f6 8.d4 Ne4 9.Bd3 f5 10.Be4 fe4 11.Ne5 Qe7 12.0–0 g6 13.Ba3 Qg7 14.c5 bc5 15.dc5 g5 16.c6 Bc8 17.Bf8 Qf8 18.Qh5 Kd8 19.fg5 Qc5 20.Nf7 Ke7 21.Nh8 Qe3 22.Kh1 Qd4 23.Qf7 Kd6 24.Qg8 Qa1 25.Qf8 1–0. jura1946 – marbek, kurnik, 2012.

5.f4 Nd7 6.Nf3 Ngf6 7.a4 Ne4 8.c4 dc4 9.Bc4 Nec5 10.0–0 h5 11.d4 Ne4 12.Ne5 Ne5 13.fe5 Qg5 14.Qf3 h4 15.Qf7 Kd8 16.Be6 Be7 17.Qf3 Rf8 18.Qe2 Rf1 19.Kf1 a6 20.d5 Bc5 21.Bd4 Bd4 22.ed4 Ke7 23.Qe4 Rf8 24.Ke2 Qh5 1–0. jura1946 – 1ziarenkopiasku, kurnik, 2012.

5.f4 Nd7 6.Nf3 Ngf6 7.c4 c5 8.bc6 Bc6 9.Ne5 Ne5 10.fe5 Ne4 11.Qg4 h5 12.Qf4 g5 13.Qf3 Bb4 14.Bd3 b5 15.0–0 Rf8 16.cb5 Bb7 17.Rd1 g4 18.Qe2 g3 19.Be4 de4 20.hg3 Qg5 21.Qf2 Be7 22.Nc3 f5 23.Ne2 Rd8 24.Nf4 Bd5 25.a4 Rg8 26.Rac1 Bb3 27.Re1 Ba4 28.Ne6 Qg6 29.Nd8 Bd8 30.Rc6 Qf7 31.Qf4 Bb5 32.Rd6 Be7 33.Rc1 Bd6 34.ed6 Kd7 35.Rc7 Ke6 36.Rf7 Kf7 37.Qf5 Ke8 38.Qb5 Kf7 39.Qf5 1–0. jura1946 – tablagiu94, kurnik, 2012.

5.Nf3 Nd7

6.c4 dc4 7.Bc4 Ngf6 8.0–0 Bd6 9.Nc3 Qe7 10.a4 0–0 11.d3 Rac8 (11...a6 12.e4=) 12.Re1 (12.a5 c6=) 12...c6 13.e4 Ne5 14.Ne5 Be5 15.d4 (15.bc6 Bc6 (worse 15...Rc6 16.Nd5 ed5 17.ed5 Bh2 18.Kh2 Qc7 19.Be5+–) 16.Nd5 Bd5 (worse 16...Nd5 17.Be5 Nc7 18.Qg4+–; worse 16...ed5 17.ed5 Bd5 18.Re5=) 17.Be5 Bc4 18.dc4 Rfd8=+ (worse 18...Rc4 19.Bd6 Qd7 20.Bf8 Kf8 21.Qb3+=)) 15...Bf4 (15...Rfd8 16.Ne2 Qb4=) 16.Qb3 (16.Ba3 c5 17.g3 Bc7=) 16...cb5=+ 17.ab5 (worse 17.Qb5 Bd2 18.Red1 Bc3 19.Bc3 a6–+ (19...Ne4?! 20.Bb4 Nd6 21.Qe5–/+; 19...Be4?! 20.Bb4 Qc7 21.Bf8=); worse 17.Bb5 Bd2 18.Red1 Bc3 19.Bc3 Ne4–/+ (19...Be4?! 20.Bb4 Qc7 21.Bf8=)) 17...e5 (17...Bd2 18.Re2 Bc3 19.Bc3 A) 19...Be4?! 20.Bb4 Qd7 21.Bf8 Qd4 22.Rea2+= (22.Ra7? Rc4 23.Re1 Kf8–+); B) 19...Qc7=+) 18.de5 (18.d5 Qc5 19.Ra4 Ng4+=) 18...Qe5 e4 draws heavy fire (18...Be5 19.Nd5 Nd5 20.ed5 (worse 20.Bd5 Bb2 21.Qb2 Bd5 22.ed5 Qd6+=) 20...Bh2 21.Kh2 Qh4 22.Kg1 Rc4 23.Qe3=+) 19.g3+– (19.Ra7?! Bh2 20.Kh1 Ng4=) 19...Bh6? (better 19...Qc7 20.gf4 Qc4 21.Qc4 Rc4+–) 20.Nd5+– (20.Ra7?! Qb8 21.Rea1 Rc7+–) 20...Qg5 (20...Qd6 21.Ba3 Bd5 22.Bd6 (22.Bd5?! Qc7+–) 22...Bc4 23.Qb4+–) 21.Bf6 gf6 22.f4 (better 22.Ne7 Kg7 23.Nc8 Rc8 24.Ra7+–) 22...Qg6 (22...Bd5 23.fg5 Bc4+–) 23.Ne7 Kh8 24.Ng6 fg6 25.Ra7 Rb8 26.e5 (better 26.Rd1!? Rfe8 27.Rd7 Bf8+–) 26...fe5 (26...Rfe8 27.Bd5 Bc8 28.Qc3+–) 27.Re5 Bg7 28.Re7 Bd4 29.Kf1 g5 30.Rh7! Kh7 31.Qd3 Kh6 32.Qd4 gf4 33.gf4 Kh5 34.Rb7! Rb7 (34...Rb7 35.Qd5 Double attack (35.Qe5 Decoy)) 35.Qd5 Kg4 36.Qg5 Kf3 37.Be2 (37.Qe5 Kg4 38.Be2 Kh4 39.Qh5) 37...Ke3+– 38.Qe5 Kd2 39.Qd4 Kc2 40.Qe4 (40.Qc4 Kd2 41.Qb4 Kc2 42.Qf8 Ra7+–) 40...Kd2 41.Qd3 (41.Qb4 Kc2 42.Qf8 Ra7+–) 41...Kc1 42.Qc3 (42.Qa3 Kc2 43.Qf8 Rc7+–) 42...Kb1 43.Bd3 (better 43.Qb4!? Kc2 44.Qf8 Ra7+–) 43...Ka2 44.Bc4 Kb1 45.Qb4 Ka1 46.Qa3 Kb1 47.Bd3 1–0. Salvador Sanchez,Ricardo (1605) – Marcos Rodriguez,Raul, 20th Obert Internacional Sant Marti Gro, 2018.

6.c4 Ngf6 7.Be2 (7.cd5 Nd5 8.Nc3 Nc3 9.Bc3 a6=) 7...dc4 8.Bc4 Be7 (8...a6 9.a4=) 9.0–0 0–0 10.d4 Bd5 (10...a6 11.a4=) 11.Nbd2 (11.Bd5 ed5 12.Qc2 a6=) 11...c6 12.Ne5 Bd6 (better is 12...cb5!? 13.Bb5 a6=) 13.bc6+/– Nb8 14.e4 (14.Bd5 Nd5 15.Rc1 f6+/–) 14...Ne4+= (14...Bc6? 15.Nc6 Nc6 16.e5+–) 15.Bd5 ed5 16.Ne4 de4 17.d5 Qc7 18.Qh5 g6? (better is 18...b5+=) 19.Ng4+– f6 (19...gh5?? 20.Nh6) 20.Qh4 (20...Be7 21.Bf6 Bf6 22.Nf6 Kh8 23.Ne4+–) 1–0. Dziedzic – Kupec, corr 3GMM–09, 1996.

6.Be2 a6=.

4.b5 d6

5.a4 Qg5 6.Nf3 Qe7 7.Be2 h6 8.0–0 Nf6 9.d4 Nbd7 10.c4 e5 11.d5 Nc5 12.Nbd2 Bc8 13.Qc2 Bg4 14.h3 Bh5 15.g4 Bg6 16.Qc1 Nfe4 17.Ne4 Be4 18.Nd2 Bg6 19.Qc3 Qh4 20.Kg2 Ne4 21.Ne4 Be4 22.f3 Bg6 23.a5 ba5 24.Ra5 Be7 25.Rfa1 0–0 26.Ra7 Ra7 27.Ra7 Bd8 28.f4 Be4 29.Kf1 Qh3 30.Ke1 f6 31.f5 Bf3 32.Bf3 Qf3 33.Qd3 Qg4 34.Ra2 Be7 35.Ra7 Bd8 36.Ba3 h5 37.c5 dc5 38.Bc5 Re8 39.Ra2 e4 40.Qc4 Kh8 41.d6 cd6 42.Bd6 Qf5 43.Qf7 Rg8 44.Bf4 Qb5 45.Rh2 Ba5 46.Kf2 Qb2 47.Kg3 Be1 48.Kh3 Qb5 49.Kg2 h4 50.Qg6 Qe2 51.Kh3 Qf3 0–1. jura1946 – edin1234, kurnik, 2012.

5.Nf3 Nd7 6.d4 Qe7 7.c4 0–0–0 8.a4 Ngf6 9.Nbd2 h5 10.Be2 h4 11.h3 d5 12.Ba3 Qe8 13.c5 e5 14.c6 Ba3 15.Ra3 Qe7 16.Rc3 ed4 17.Nd4 Nc5 18.cb7 Kb7 19.Nc6 Qe6 20.Nd8 Rd8 21.Rc5 bc5 22.0–0 g5 23.a5 Nh5 24.Nb3 f5 25.Nc5 1–0. popovicigelu – tavita1964, kurnik, 2012.

5.Nf3 Nd7 6.d4 Ngf6 7.c4 Be7 8.Bd3 0–0 9.0–0 d5 10.Nbd2 dc4 11.Bc4 c5 12.a4 cd4 13.Bd4 Nc5 14.Nb3 Qc7 (14...Rc8 15.Qe2=) 15.Nc5 bc5 16.Bb2 (16.Be5 Qa5=) 16...Rad8 17.Qe2 Nd5 (17...Ng4 18.e4=) 18.Rad1 Nb4 19.Rd8 Rd8 20.Rd1 h6 (20...Rd1 21.Qd1 Qd8 22.Qd8 Bd8 23.Be5 Bf3 24.gf3+=) 21.Ne5 (21.Rd8 Bd8 22.Nd2 Qe7+=) 21...Nd5 (21...Rd1 22.Qd1 Bf6 23.f4=) 22.e4 Nf4 23.Rd8 Qd8 24.Qc2 Bd6 25.g3 Nh3 26.Kg2 Ng5 27.f4?? Be4–+ 28.Qe4 Ne4 29.Kf3 Nf6 30.Nc6 Qa8 31.Bf6 gf6 32.Ke4 Kf8 33.a5 Ke8 34.f5 Kd7 35.fe6 fe6 36.a6 Bc7 37.Ke3 Bb6 38.Kf4 Qg8 39.h4 e5 40.Kf5 Qc4 41.Kf6 Qe6 42.Kg7 Kd6 (42...Kd6 43.h5 c4 44.g4 Qg4 45.Kf7 c3 46.Ne7 Qe6 47.Kg7 Qe7 48.Kg6 Ke6 49.Kh6 Be3 50.Kg6 Qf7#) 0–1. popovicigelu – zvezda89 (1740), kurnik, 2011.

5.Nf3 Nd7 6.Be2 h6 7.0–0 Ngf6 8.d3 g6 9.c4 Bg7 10.a4 Nc5 11.Nbd2 e5 12.d4 ed4 13.Nd4 Qd7 14.Bf3 Bf3 15.Qf3 0–0 16.Nc6 Nd3 17.Bf6 Ne5 18.Be5 de5 19.Ne4 a5 20.Nf6 Bf6 21.Qf6 Qe6 22.Qe5 Qc4 23.Ne7 Kh7 24.Nd5 Rae8 25.Nf6 Kg7 26.Ne8 Kg8 27.Nf6 Kh8 28.Nd7 Kh7 29.Nf8 1–0. avinoam – kliford, kurnik, 2012.

5.f4 Nd7 6.Nf3 Nc5 7.d4 Ne4 8.Nc3 Ngf6 9.Ne2 Ng4 10.Ng3 Nef2 11.Qe2 Nh1 12.h3 Ng3 0–1. jura1946 – josealquizar, kurnik, 2012.

5.f4 Nd7 6.Nf3 Ngf6 7.a4 Be7 8.Bd3 Nc5 9.Bc4 d5 10.Bb3 Nb3 11.cb3 d4 12.Bc1 de3 13.de3 Qd1 14.Kd1 Rd8 15.Ke2 0–0 16.Bb2 Bf3 17.Kf3 Bc5 18.Bf6 gf6 19.Re1 Rd3 20.a5 Re8 21.ab6 Bb6 22.Na3 e5 23.f5 e4 24.Kf4 Re5 25.Nc4 Rb5 26.Nb6 ab6 27.Ke4 Rdb3 28.Kf4 R3b4 29.e4 Rb2 30.Ra8 Kg7 31.Kg3 R5b3 32.Kf4 Rf2 33.Kg4 Rg2 34.Kf4 Rf2 35.Kg4 1–0. jura1946 – nozyk65, kurnik, 2012.

5.f4 e5 6.Nf3 g6 7.fe5 Bg7 8.Bc4 de5 9.0–0 Ne7 10.Ne5 0–0 11.Bf7 Kh8 12.Bb3 Nd5 13.Nf7 Kg8 14.Nd8 Rd8 15.Qf3 Rf8 16.Bd5 Kh8 17.Qf8 1–0. jura1946 – apacz08, kurnik, 2012.

5.f4 Ne7 6.Nf3 Ng6 7.a4 c6 8.c4 c5 9.Bd3 Nh4 10.0–0 Nf3 11.gf3 Nd7 12.e4 Nf6 13.e5 de5 14.Be5 Qd3 15.Nc3 Be7 16.Ra3 Qg6 17.Kf2 Qh6 18.Rh1 Nh5 19.Ne4 Be4 20.fe4 Nf4 21.Qf3 Nh3 22.Qh3 Qd2 23.Kf1 Rd8 24.Qf3 Qc1 25.Kg2 Qg5 26.Bg3 Rd2 27.Kf1 Rc2 28.Bf4 Qf6 29.e5 Qf5 30.Qc6 1–0. jura1946 – matryca58, kurnik, 2012.

5.f4 g5 6.Bh8 gf4 7.Nf3 Bf3 8.Qf3 fe3 9.de3 d5 10.Bd3 Bb4 11.c3 Bc5 12.0–0 Qg5 13.Qf7 Kd8 14.Bd4 Bd6 15.Nd2 Nd7 16.Nf3 Rc8 17.Ng5 c5 18.Bf6 Kc7 19.Ne6 Kb8 20.Qd7 Nf6 21.Qd6 Rc7 22.Rf6 h5 23.Rf8 Kb7 24.Nd8 Ka8 25.Nc6 Kb7 26.Rb8 1–0. jura1946 – kluseczkizmakiem, kurnik, 2012.

4.b5 Qe7

5.a4 d6 6.Nf3 Nf6 7.Be2 Ne4 (7...g6 8.a5+=) 8.d3 (8.a5 ba5 9.Ra5 Qd8+–) 8...Ng5 (8...Nf6 9.a5+–) 9.0–0 e5 (9...Nd7!?+–) 10.Ng5 Qg5 11.Bf3 c6 12.d4 (12.Nd2 Qd8 13.d4 Qc7 14.de5 de5+–) 12...ed4 (12...Be7 13.Nc3+–) 13.ed4 Be7 14.bc6 (better 14.Bc1 Qf5 15.Re1+–) 14...Nc6+– 15.Bc6?? (better 15.Bc1 Qf5 16.Re1+–) 15...Bc6=+ 16.d5 (better 16.f3=+) 16...Bd7?? (better 16...Bd5 17.g3 0–0–/+) 17.f4 (17.Re1 Kf8+–) 17...Qh6 (17...Qf5 18.Re1 f6 19.Bd4=) 18.Qe2+= 0–0?? (better 18...Kf8+=) 19.Qe7+– (19.Qe7 Rad8 20.Qe3+–) 1–0. GuestQLKM – GuestWQBN, freechess.org, 2019.

5.c4 Nf6 6.Nf3 g6 7.d4 Bg7 8.Nc3 0–0 9.Qb3 d5? (9...a6 10.Be2=) 10.Nd2 (better is 10.Ba3 Qd8 11.Bf8 Bf8 12.Be2+–) 10...dc4 11.Bc4 Nd5? (11...Rd8 12.Ba3 Qe8 13.f3=) 12.0–0 (better is 12.Nd5!? Bd5 13.Ba3 Bc4 14.Be7 (14.Nc4?! Qg5+/–) 14...Bb3 15.Bf8 (15.ab3?! Re8 16.Bh4 a5=; 15.Nb3?! Re8 16.Bh4 a6=) 15...Kf8 16.ab3+–) 12...Nc3+= 13.Bc3 Nd7 14.f3 Nf6? (14...Rfc8 15.Rac1+=) 15.e4 (better is 15.Bb4 Qd7 16.Bf8 Bf8 17.Rfd1+–) 15...Nh5 16.Rad1 Qh4 17.Rf2 Nf4 18.d5 Qg5? 19.Bg7?? Kg7 20.de6 Nh3 21.Kf1 Nf2 22.Kf2 fe6 23.Be6 Qc5 24.Qe3 Qe3 25.Ke3 Rae8 26.Bb3 c6 27.a4 cb5 28.ab5 a6 29.ba6 Ba6 30.Nc4 Rd8 31.Rd8 Rd8 32.Ne5 Rc8 33.Bd5 Rc2 34.h3 Rg2 35.Ng4 Re2 36.Kf4 h5 37.Ne5 Rh2 38.Kg3 Ra2?? 39.Kf4 Ra5 40.h4 b5 41.Nc6 Ra4 42.Nd8 b4 43.Ne6 Kf6 44.Nc5 Ra3 45.Nb3 Kg7 46.e5 Bd3 47.e6 Kf8 48.Ke5–/+ Ke7 49.Nc5 Bc2 50.Kf4?? b3 51.Bb3 Bb3 52.Ne4 Be6 53.Ng5 Ra4 54.Kg3 Kf6 55.f4 Ra3 56.Nf3 Bg4 57.Kf2 Rf3 58.Ke2 Rf4 59.Ke3 Rf3 60.Ke4 Rf5 61.Ke3 Bh3 62.Ke4 Ke6 63.Ke3 Ke5 64.Ke2 Rf4 65.Ke3 Rh4 66.Kf3 Rf4 67.Kg3 Bf5 68.Kh2 g5 69.Kh1 g4 70.Kh2 g3! 71.Kg1 h4 72.Kg2 h3 73.Kg1 h2 74.Kh1 Be4# 0–1. captainevans – anddzej, kurnik, 2012.

5.d4 Nf6 6.Nf3 g6 7.c4 Bg7 8.Nc3 0–0 9.Qc2 c6 10.Bd3 cb5 11.cb5 a6 12.a4 ab5 13.ab5 Ra1 14.Ba1 Bf3 15.gf3 Nd5 (15...d5 16.Bb2=) 16.Ne2 (better is 16.Nd5!? ed5 17.f4+=) 16...Qh4 17.Ng3 h5 18.Qc4 Qf6 19.Be2 h4 20.Ne4 Qf5 21.0–0 h3 22.Ng3 Qg5 23.e4 (better is 23.f4!? Qe7 24.Rc1+/–) 23...Nf4+= 24.Bd1 Nh5 25.Bb3 Ng3 26.fg3 Qe3 27.Kh1 Qd2 28.Rg1 Qf2 29.Qf1 Qe3 30.Bb2?? (better is 30.Bd1+=) 30...Qb3–+ 31.Bc1 Bd4 32.Qe1 (32.Qd1 Qb4 33.Re1–+) 32...Bg1 (32...Qf3 33.Rg2 hg2#) 33.Qg1 Qf3 (33...Qf3 34.Qg2 Qg2#) 0–1. captainevans – anddzej, kurnik, 2012.

5.Nf3 Qb4 6.Ba3 Qa5 7.Bf8 Kf8 8.c4 Qb4 9.Nc3 Ke8 10.Be2 a6 11.0–0 Nf6 12.a4 Qc5 13.Qb3 a5 14.d4 Qd6 15.Rac1 Ng4 16.h3 Bf3 17.hg4 Be2 18.Ne2 c6 19.Ng3 Qc7 20.c5 h6 21.Ne4 d5 22.Nd6 Ke7 23.f4 Nd7 24.f5 Nf6 25.fe6 Ke6 26.e4 Ng4 27.Rf7 Qd8 28.ed5 cd5 29.Re1 Ne3 30.Qe3 1–0. popovicigelu (1620) – ma3tzo, kurnik, 2012.

5.Nf3 Qc5 6.a4 Nf6 7.Ba3 Qd5 8.Bf8 Rf8 9.Nc3 Qd6 10.Be2 c6 11.0–0 Ke7 12.d3 Rd8 13.e4 Qc7 14.Nd4 Kf8 15.Bf3 h6 16.e5 Nd5 17.Nd5 ed5 18.c4 dc4 19.dc4 Qe5 20.Re1 Qc5 21.Qd3 d5 22.bc6 Nc6 23.Bd5 Qd4 24.Qd4 Nd4 25.Bb7 Rab8 26.Bd5 Nc2 27.Rec1 Na1 28.Ra1 Rbc8 29.a5 Rc5 30.ab6 ab6 31.Rb1 b5 32.Rc1 bc4 33.Bf3 c3 34.g3 Rd3 35.Be4 Rd2 36.Kf1 f5 37.Bf5 Rf5 38.Rc3 Rff2 39.Ke1 Rh2 40.Rc7 Ra2 0–1. chybol3 – lekers, kurnik, 2012.

5.Nf3 c6 6.a4 Nf6 7.Na3 g6 8.c4 Bg7 9.d4 0–0 10.Be2 Qb4 11.Qd2 Qa4?? (better is 11...Qd2 12.Nd2 cb5 13.Nb5 a6=) 12.Nc2 Qb3 13.Ba3 (better is 13.Qc1 cb5 14.Nd2 bc4 15.Bc4 Bg2 16.Rg1 (16.Nb3?! Bh1 17.Bd3 Rc8+–; 16.Bb3?! Bh1 17.f3 Bg2+–) 16...Qc4 17.Nc4+–) 13...Ne4 14.Qd3 Qd3 15.Bd3 d5 16.Be4 de4 17.Nd2 cb5?? 18.Bf8+= Kf8 19.cb5 Nd7 20.0–0 Kg8 21.Nb4 Nf6 22.Nc6 Nd5 23.Ra7 Bc6+= 24.Ra8 Ba8 25.Nc4?? Nc3–/+ 26.Ra1 Bd5 27.Nb6 Nb5 28.Rb1? Nc3–+ 29.Rc1?? Ne2 30.Kf1 Nc1 31.Nd5 ed5 32.Ke1 Nd3 33.Kd2 Bf8 34.f4 Bd6 35.g4 h6 36.h4 f6 37.f5 g5 38.h5 Nf2 39.Kc3 Ng4 40.Kb3 Ne3 41.Ka4 Nf5 42.Kb5 If White now would get e3 in, he might survive 42...Nd4 43.Kb6 f5 44.Kb7 Kf7 45.Kc8 f4 46.Kd7 Nf5 47.Kd8 Ke6 48.Ke8 e3 49.Kd8 e2 50.Ke8 e1Q 51.Kd8 d4 52.Ke8 Qa5 (52...Qb1 53.Kd8 Qb8#) ½–½. azme (1610) – bekimkrasniqi, kurnik, 2011.

5.Nf3 d5 6.a4 Nd7 7.Be2 h5 (7...a5 8.d4+=) 8.c4 (8.a5 ba5 9.Ra5 Ngf6+/–) 8...dc4+= 9.Bc4 0–0–0 (better is 9...Qb4 10.Qc2 Ngf6=) 10.Nc3 (10.d3 e5 11.0–0 h4+/–) 10...Nc5 (better is 10...Bf3 11.gf3 Qb4=) 11.0–0 Nd3 (11...Qf6 12.d4+=) 12.Ba3 (12.Bd3 Rd3 13.Ba3 Qd8 14.Bf8 Qf8+–) 12...Qe8? (better is 12...Qf6!? 13.Bd3 Ba3 14.Ra3 Rd3+/–) 13.Bf8+/– Qf8 14.a5 ba5? 15.Ra5 Nb2 16.Qb3 Nc4 17.Qc4 Qd6 18.Ra7 Ne7 19.Rfa1 Bf3 20.gf3 Kd7 21.Ne4 Qe5 22.d4 Qf5 23.Qc7 Ke8 24.Qe7# 1–0. fagus54 – a441, kurnik, 2011.

5.Nf3 d5 6.c4 Nd7 7.a4 dc4 8.Bc4 0–0–0 9.a5 Nc5 10.ab6 ab6 11.d4 Ne4 12.Nbd2 Nd2 13.Qd2 Qb4 14.Bc3 Qc4 15.Ne5 Qb5 16.Nf7 Bg2 17.Rg1 Bd5 18.Nh8 Nh6 19.Qb2 Qb2 20.Bb2 Bd6 21.Rg7 Rh8 22.Ke2 Bh2 23.f3 Bd6 24.e4 Bb7 25.Rh1 Bf8 26.Rg2 Nf7 27.d5 e5 28.f4 Bd6 29.Rg7 Nd8 30.f5 h5 31.f6 h4 32.f7 h3 33.Rg3 h2 34.Rg8 Rh4 35.Kd3 Rf4 0–1. fagus54 – profutm, kurnik, 2012.

5.Nf3 d5 6.d4 Nd7 7.Be2 0–0–0 8.Nbd2 Kb8 9.0–0 h5 10.c4 dc4 11.Nc4 g5 12.a4 g4 13.Nfd2 h4 14.a5 g3 15.h3 gf2 16.Rf2 Bh6 17.Nf1 Ngf6 18.ab6 ab6 19.Qb3?? (better is 19.Ba3 Qe8 20.Nd6+–) 19...Ne4+= 20.d5? (20.Rf3 Rhg8 21.Qa4–/+) 20...ed5 21.Na3 Nf2 22.Bh8? Rh8 23.Kf2 Qf6 24.Kg1 Qa1 25.Nc2 Qf6 26.Nd4 Rg8 27.Bg4 Ne5 28.Be2 Qg6 29.Kf2 Qf6 30.Ke1?? Qd6 31.Nf5 Qf6 32.Nd4 Nc4 33.Bc4 dc4 34.Qc4 Re8 35.Nc2 Qe6 36.Qd3 Bg2 37.Nd4 Qd6 38.Qc4 Bf1 39.Nc6 Kb7 40.Qa4 Bb5! 41.Qb5 Re3 42.Kf2 Qg3 43.Kf1 Qe1 44.Kg2 Rg3 45.Kh2 Qg1# 0–1. captainevans – erijoni2006, kurnik, 2012.

5.Nf3 d6 6.a4 Nd7 7.Be2 0–0–0 8.0–0 d5 9.d4 Qf6 10.c4 g5 11.cd5 Bd5 12.Nc3 Bb7 13.Rc1 h5 14.e4 Rh7 15.Bd3 Qf4 16.Ne2 Qd6 17.e5 Qb4 18.Bc3 Qa3 19.Qc2 Rg7 20.Bb4 Qb4 21.Qc7 1–0. chybol3 – niegowski, kurnik, 2012.

5.Nf3 d6 6.c4 Nd7 7.d4 0–0–0 8.Nc3 f6 9.Be2 g5 10.0–0 h5 11.a4 h4 12.a5 g4 13.Ne1 g3 14.fg3 hg3 15.h3 Rh3?? (15...Bh6 16.Nc2 Kb8+/–) 16.Bf3 (better is 16.gh3 Qh7 17.Bh5+–) 16...Bf3 17.Nf3 Rh8 18.ab6?? (18.Qd3 Bh6 19.Bc1 f5=) 18...ab6 19.Qa4= Qh7?? 20.Qa6 Kb8 21.Qa7 Kc8= 22.Qa8?? Nb8 23.Qe4 Qh1# 0–1. captainevans – niegowski, kurnik, 2012.

5.Nf3 g6?? 6.Bh8+– 1–0. DEFFM – GuestGNWZ, freechess.org, 2019.

4.b5 Ne7

5.Nf3 Ng6 6.d4 d6 7.c4 Be7 8.Be2 0–0 9.0–0 Nd7 10.Nbd2 Bf6 11.a4 a6 12.Qb3 a5 13.e4 e5 14.d5 Nh4 15.Ba3 Nf3 16.Nf3 Bc8 17.h3 h6 18.Rac1 Bg5 19.Rc2 Nf6 20.Bc1 Ne4 21.Ng5 Ng5 22.Bg5 Qg5 23.Qf3 Qf5 24.Rcc1 Qf3 25.Bf3 Bf5 26.g4 Bg6 27.Rfe1 f5 28.Kg2 fg4 29.hg4 Rf4 30.Kg3 Raf8 31.Re3 Rd4 32.Be2 Rff4 33.f3 Kf7 34.Kh4 Kg8 35.Rc2 Kh7 36.Rc1 Kh8 37.Kg3 Kh7 38.Kh4 Be8 39.Bd3 Kh8 40.Be4 g5 41.Kg3 Kg7 42.Ree1 Bg6 43.Bg6 Kg6 44.Re3 Rc4 45.Rc4 Rc4 46.Ra3 h5 47.gh5 Kh5 48.Ra2 Kg6 49.Ra3 Kf5 50.Ra2 e4 51.fe4 Ke4 52.Kg4 Kd5 53.Kg5 Kc5 54.Kf5 c6 55.Ke6 cb5 56.ab5 Kb5 57.Kd6 Ka6 58.Kd5 Rc1 59.Rh2 a4 60.Rh4 b5 61.Rh6 Ka5 62.Rh8 a3 63.Kd4 Ka4 64.Ra8 Kb3 65.Ra5 b4 66.Kd3 a2 67.Kd2 Rc7 68.Ra8 Kb2 69.Ra4 b3 70.Ra7 Ra7 0–1. popovicigelu – sionekolek1, kurnik, 2012.

5.Nf3 Ng6 6.d4 Be7 7.c4 Bf6 8.Be2 0–0 9.0–0 a5 (9...a6 10.Nc3=) 10.a4 (10.Nc3 d6+=) 10...d6 11.Nc3 Nd7 12.Rc1 e5 13.d5 Nc5 14.Ba3 Bc8 15.Bc5 dc5 16.e4 (16.Qd3 Be7=) 16...Nf4= 17.g3 Ne2 18.Ne2 Bh3 19.Re1 Bg5 20.Rc2 Qf6 (20...Re8 21.Ng5 Qg5 22.Qd2=) 21.Ng5 Qg5 22.f4 ef4 23.Nf4 Bg4 24.Qd2 Qe5 25.Nd3 Qd4 26.Qe3 White plans e5 26...Rae8 Exerts pressure on the backward pawn 27.Qd4+/– cd4 28.e5 Bf5+= 29.Rd2 Bd3? 30.Rd3+– f6 31.e6 Re7 32.Rd4 Rd8 33.Rc1?? Rd6? 34.c5+– bc5 35.Rc5 g5 36.Rdc4 h5 37.Kf2 g4 38.Ke3 Kh7 39.Ke4 Kg6 40.Rc7 f5 41.Ke5 Rc7 42.Rc7 Rd8 43.e7 Re8 44.d6 (44.d6 h4 45.Ke6 hg3 46.hg3+–) 1–0. popovicigelu – mora168, kurnik, 2011.

5.Nf3 Ng6 6.Be2 d5 7.a4 Nd7 8.c4 (8.Nc3 a6=) 8...Nf6 (8...dc4 9.0–0=) 9.0–0 Bd6 10.d4 (10.cd5 ed5 11.a5 ba5 12.Ra5 c5+=) 10...dc4 11.Bc4 0–0 12.Nbd2 Nd5 13.Rc1 Qf6? (better is 13...a6=) 14.e4+– Ndf4 15.e5 Qf5 16.ed6 cd6 17.Qc2?? (better is 17.h3+–) 17...Qg4–+ 18.g3 Bf3 19.Nf3 Qf3 20.gf4 Nf4 21.Bd5 ed5 (21...ed5 22.Qh7 Kh7 23.Rfe1 Qg2#; 21...Nh3#) 0–1. fagus54 – krovva, kurnik, 2011.

5.f4 Ng6 6.Nf3 Be7 7.Bg7 Rg8 8.Bb2 d6 9.a4 Nd7 10.Nc3 Nc5 11.Qe2 Qd7 12.d4 Ne4 13.Ne4 Be4 14.c4 c6 15.Nd2 d5 16.Ne4 de4 17.Qc2 f5 18.0–0–0 cb5 19.cb5 Rc8 20.Bc3 Bb4 21.Kb2 Rc3 22.Qc3 Bc3 23.Kc3 Ke7 24.Bc4 Rc8 25.Kb3 Nh4 26.d5 ed5 27.Rd5 Qc7 28.Rc1 Kf6 29.g4 Ng2 30.g5 Kg6 31.Rc3 Ne3 0–1. jura1946 – kempes1, kurnik, 2012.

4.b5 Qg5

5.Nf3 Qd8 6.Be2 c6 7.a4+– d6 8.0–0 Nd7 (8...Nf6 9.Na3+–) 9.d4 (9.bc6!? Bc6 10.a5+–) 9...Ngf6+– 10.c4 Ne4 (10...Be7 11.Qb3+=) 11.Nbd2 Nd2 12.Qd2 Nf6 13.d5 (better 13.bc6 Bc6 14.d5+–) 13...ed5?? (better 13...cd5 14.cd5 Bd5=) 14.bc6+– Bc6 15.cd5 Bd5?? (better 15...Bd7+–) 16.Bb5 (better 16.Bf6!? Bf3 17.Bd8 Be2 18.Qe2 Rd8+–) 16...Ke7 17.Nd4 (better 17.Bf6 gf6 18.Qd5+–) 17...Ne4 (17...a6 18.Bc6 Rc8 19.Rac1+–) 18.Nf5 Ke6 19.Nd4 (19.Qd1 Rc8 20.Qh5 Rc5+–) 19...Ke7 20.Qb4 (better 20.Qd1 Rc8 21.Nf5 Ke6 22.Qh5+–) 20...f6 (20...Qc8 21.Rac1 Nc5 22.e4+–) 21.Nf5 (better 21.Bc6 Nc5 22.Bd5+–) 21...Kf7 22.Rad1 Be6?? (22...Bb7 23.Bc4 d5+–) 23.Qe4 g6 (23...d5 24.Qf3 h5+–) 24.Nd4 Bd7 1–0. GuestHVTY – ggggg, freechess.org, 2019.

5.Nf3 Qg6 6.Ne5 Qg5 7.d4 Bg2?? (better 7...a6=) 8.Rg1+– f6 9.Rg2 (9.Bg2?! fe5 10.h4 Qg6+–) 9...Qf5 10.Nf3 Bb4 11.c3 Bd6 (11...Bf8 12.Bd3 Qh5 13.Qe2+–) 12.Bd3 Qh3 13.Rg7 Nh6 (13...a6 14.Be4 Ra7 15.Bh7+–) 14.Ng1 (14.Bh7 Nf5 15.Bf5 Qf5+–) 14...Qh2 15.Qf3 c6 16.Nd2 (better 16.Nh3 Nf7+–) 16...f5 (16...Bf8 17.Rg2 Qh4+–) 17.Nh3 Ng4 (17...Bf8 18.Rg3 Ng4 19.0–0–0+–) 18.Nf1 (18.Nf1 Nf2 19.Qh5 Kd8 20.Qg5 Kc7 21.Nf2+–) 1–0. DEFFM – Bands, freechess.org, 2018.

4.c4 a6

5.a4 Bb4?? 6.Bg7 Ne7 7.Bh8 d6 (7...Nf5 8.Nf3+–) 8.Qh5 (8.Bc3 a5+–) 8...Nbc6 (8...Be4 9.Nf3+–) 9.Bf6 Qd7 10.Qh7 Ng6 11.Qg8 (11.h4 Nf8 12.Qg8 Ne7+–) 11...Nf8 12.Bg7 Qe7 13.Qf8 Qf8 14.Bf8 Kf8 15.Nf3 Ke7 16.Be2 Rg8 17.0–0 (17.Kf1 e5+–) 17...Nd8 (17...Na5 18.d3+–) 18.Nc3 (18.d4 c5+–) 18...Bc3 19.dc3 Bf3 (19...Nc6 20.c5 dc5 21.Rfd1+–) 20.Bf3 f5 (20...Rg5 21.a5 ba5 22.Ra4+–) 21.Rfd1 (21.a5 ba5 22.Ra5 Nf7+–) 21...Nf7 (21...a5 22.c5 dc5 23.Rd2+–) 22.g3 (22.a5!? Ne5 23.Bb7 ba5+–) 22...Ne5 23.Be2 Nf7 (23...Nd7 24.h4+–) 24.f4 (24.a5 Ra8+–) 24...Nh6 (24...a5 25.c5 dc5 26.Rd3+–) 25.Kf2 (25.a5 ba5 26.Ra5 Ng4+–) 25...Nf7 (25...a5 26.h3+–) 26.a5 ba5 (26...Rh8 27.h4 Ra8 28.Rdb1 ba5 29.Ra5+–) 27.Ra5 Ra8 28.Rda1 Nd8 (28...e5 29.Ra6 Rh8 30.h4+–) 29.Ra6 Rb8 30.Ra7 Kd7 31.c5 dc5 (31...d5 32.c4 Nc6 33.Ra8+–) 32.R1a5 (better 32.Rd1 Ke8+–) 32...Nc6 33.R5a6 (better 33.Ra8 Ra8 34.Ra8 Ne7+–) 33...Na7 34.Ra7 Rb2 (34...Rb3 35.c4+–) 35.Kf3 Rc2 (35...Kd6 36.h3+–) 36.Ra3 (36.Bb5 Kd8 37.Ra6 Rb2+–) 36...Kd6 37.Bd3 (37.h3 Rc1+–) 37...Rc1 (37...Rh2 38.Ra6 Ke7 39.Bc4+–) 38.Ra6 (better 38.e4 Rd1 39.c4 fe4 40.Be4 Rf1 41.Ke2 Rc1+–) 38...Kd5 (38...c6 39.Ra3+–) 39.c4 Rc4 40.Bc4 Kc4 41.Re6 Kd5 42.Re5 Kc4 (42...Kc6 43.Rf5 c4 44.Ke4+–) 43.Rf5 Kb4 44.Ke2 c4 45.Kd1 c3 46.Kc1 Kb3 47.Rf7 c5 48.Rc7 c4 49.Rc4! Kc4 50.Kc2 (50.Kc2 Kd5 51.Kd3+–) 1–0. RichardSommer (1995) – stuckonagame (1940), lichess.org, 2020.

5.a4 Bb4?? 6.Bg7 Bg2 7.Bg2 +–.

5.a4 c6 6.b5 (6.Qb3 d5=) 6...c5 (6...Nf6 7.Nf3=+) 7.Nf3= a5 (7...Nf6 8.Be2=) 8.Be2+= d6 9.0–0 Nd7 10.Qc2 Ndf6 11.d3 d5 12.Nbd2 Nh6 13.Rad1 Bd6 14.cd5 Bd5? (better 14...ed5 15.e4 Be7+=) 15.e4+– Bc6 (15...0–0 16.Nc4 Bc7 17.ed5 ed5 18.Nce5+–) 16.e5 (better 16.bc6 Be7+–) 16...Be5 17.Ne5 Bd5 18.Bf3 Bf3 19.Ndf3 (19.gf3?! Nd5+–) 19...0–0 (19...Nf5 20.Rfe1 Nd5 21.Nc6+–) 20.Nc6 Qc8 (20...Qc7+–) 21.Ne7 Kh8 22.Nc8 Rac8 23.Bf6 gf6 24.Qb2 e5 (24...Kg7 25.d4+–) 25.Nh4 (25.Nd2!? Rg8+–) 25...Rcd8 26.f4 Ng4 (26...Rd4 27.fe5 Rh4 28.Qf2+–) 27.fe5 (better 27.Qe2 Rg8 28.h3 Rd4+–) 27...Ne3 (27...Rd4 28.Nf5 Ra4 29.d4 fe5 30.Qe2+–) 28.Rfe1 (better 28.Qf2 Nd5 29.d4 c4+–) 28...Nd1 29.Rd1 Rd4 (29...Rfe8 30.ef6 Rd5 31.d4+–) 30.Nf5 (30.Qf2 f5 31.Qf5 f6+–) 30...Ra4 (30...Rf4 31.Rf1 Rf1 32.Kf1+–) 31.e6! fe6 (31...fe6 32.Qb3 Double attack (32.Qb3 Decoy)) 32.Nd6 (better 32.Qb3 ef5 33.Qa4 Ra8+–) 32...e5 (32...Rd4 33.Nc4 Kg7 34.Nb6+–) 33.Qb3 Rd4 (33...Rg4 34.Qe6 Rg6 35.Rf1+–) 34.Qe6 a4 (34...Rf4 35.g3 Rf3+–) 35.Qe7 Kg8 36.Nf5 Rg4 37.Nh6 Kh8 38.Qf8 (38.Qf8 Rg8 39.Qg8) 1–0. GuestTPLH – Discanto, freechess.org, 2017.

5.a4 Nc6 6.b5 Nb4 7.Nf3+=.

5.a4 Nf6 6.Nf3 (6.b5!?+=) 6...Bb4 7.Ba3 (7.Nc3 Nc6–/+) 7...Nc6 8.Be2 0–0 9.0–0 Ba3 10.Ra3 d6 (10...Qe7 11.Qc1–+) 11.d3 Nb4 12.Ne1 (12.a5 b5–/+) 12...c5 13.Bf3 d5 14.cd5 Bd5 15.Bd5 ed5 16.Nd2 a5 (16...b5 17.Nc2 Nc2 18.Qc2–+) 17.Nc2 Qd6 18.d4 (18.Ne1 Rfe8–+) 18...Nc2 19.Qc2 Ng4 20.g3 (20.Nf3 cd4 21.Rb3 de3 22.fe3 Rfe8–+) 20...cd4 21.Rd3 (21.Qd3 de3 22.fe3 Rfe8–+) 21...de3 (21...Qh6 22.Nf3 de3 23.Qb3 ef2 24.Rf2 Nf2 25.Kf2–+) 22.fe3 (22.f3 e2 23.Re1–+) 22...Qh6 23.Nf3 Ne3 (23...Ne3 24.Qd2 Nf1 25.Qh6 gh6 26.Kf1 Rad8–+) 0–1. Hasler,Ueli (1710) – Vollbrecht,Joerg (2090), CiF, 2006.

5.b5 Nf6=.

4.c4 Bb4??

5.Bg7 b5 6.cb5 +–.

5.Bg7 Bd2 6.Nd2 Bg2 7.Bg2 +–.

5.Bg7 Bd2 6.Nd2 Bg2 7.Bh8?! Bh1 8.Bd3 Nc6 +–.

5.Bg7 f6 6.Bh8 Qe7 7.Qh5 Qf7 8.Qf7 (better 8.Qh4+–) 8...Kf7 9.Nf3 Nh6 (9...Ne7 10.a3 Ba5 11.Bd3+–) 10.a3 (10.Bd3 Na6 11.Bf6 Kf6 12.Bh7 Rh8+–) 10...Be7 11.Be2 Nc6 12.0–0 (better 12.Bf6!? Bf6 13.d4+–) 12...Rh8 13.Nd4 (13.Nc3 Na5+–) 13...Rg8? (better 13...Nd4!? 14.Bh5 Kf8 15.ed4 Nf5+=) 14.Bf3 Nd4 Threatening mate... how? 15.Bb7 Nb3 16.Ra2 c6 17.Nc3?? (better 17.d4+–) 17...Nc5=+ 18.Bc6 dc6 19.d4 Nd7 20.Rb1 (20.Rd1 Nf5=+) 20...Nf5 21.g3 (21.Ne4 c5 22.d5 Ne5–/+) 21...Bd6 (21...c5 22.Ne2–/+) 22.Ne4 Ke7 23.Nd6 (23.Rd2 Rg4 (worse 23...Ba3 24.Ra2+–) 24.Nd6 Nd6=+) 23...Kd6 (23...Nd6 24.Rc2 c5–/+) 24.c5 (24.Rd2 Ke7=+) 24...Kc7 (24...bc5!? 25.dc5 Nc5–/+) 25.cb6=+ ab6 26.Rab2 (26.Rc1 e5 27.Rac2 c5 (worse 27...ed4 28.Rc6 Kb8 29.Rd1+–) 28.dc5 bc5–/+) 26...Nd6 (26...e5 27.Rd1–/+) 27.a4 Ra8 28.Rb4 b5 29.ab5 Nb5 (29...cb5 30.Rc1 Kb6 31.Rb2–/+) 30.Rc1=+ Nd6 31.Rb3 Nb6 (better 31...e5!?=+) 32.Rbc3+= Exerts pressure on the isolated pawn 32...Nd5 33.Rc6 Kd7 (33...Kd7 34.Kg2 Ra2+=) 0–1. RichardSommer (2030) – benn0o (2025), lichess.org, 2020.

5.Bg7 Qg5 6.Bh8 Bg2 7.Bg2 Qg2 8.Qf3 Qf3 9.Nf3 f6 10.Rg1 Kf7 11.Rg7 Kf8 12.a3 Bd6 (12...Be7 13.Rh7 f5 14.Bg7 Ke8 15.Nc3+–) 13.Rh7 Nc6 14.Nc3 Nge7 (14...Nd8 15.Ne4 Be7 16.d4+–) 15.Ke2 (15.Bf6 Ng8 16.Ne4 Be7 17.Be7 Nce7+–) 15...Kg8 16.Rh6 Nf5 (16...Kf7 17.Rf6 Ke8 18.Rh6+–) 17.Rg1 Kf7 (17...Kf8 18.Rh7 Rb8 19.Ne4 Bh2 20.Nh2+–) 18.Rh7 Ke8 (18...Kf8 19.Ne4 Bh2 20.Bg7 Ke8 21.Nh2 Rb8 22.Bf6 Nfd4 23.Kd1 Ne7 24.Be7 b5 25.Rg8) 19.Rg8 Bf8 20.Bg7! Ng7 (20...Ng7 21.Rhg7 Combination) 21.Rhg7 Ne7 22.Rh8 Nf5 23.Rgh7 Ne7 (23...Nd6 24.Nb5 Rc8 25.Nd6 cd6 26.Nh4+–) 24.d4 (better 24.Ne4 Ng6 25.Rg8+–) 24...Ng6 25.Rg8 (25.Nb5 Rc8 26.Na7 Nh8 27.Nc8 Nf7+–) 25...Ne7 26.Rgh8 Ng6 27.Rg8 (27.Nb5 Rc8 28.Na7 Nh8 29.Nc8 Nf7+–) 27...Ne7 28.Rg1 d6 (28...d5+–) 29.Ne4 f5 (29...Kd7 30.Nf6 Kc6 31.Rf7+–) 30.Nf6 Kd8 31.Rh8 Ng8 32.Rgg8 (32.Rgg8 Rb8 33.Rf8 Ke7 34.Rh7 Kf8 35.Ng5 b5 36.Ne6) 1–0. OnlyPolishOpening (1945) – GH59 (1885), lichess.org, 2020.

4.c4 c5

5.a3 cb4 6.ab4 Nf6 (6...Bb4?? 7.Bg7 d5 8.cd5 Bd5 9.Bh8+–) 7.b5 Be7 8.f4 d6 9.Nf3 Nbd7 10.Be2 Qc7 11.0–0 0–0 12.Nc3 Rac8 13.Ra7 Ra8 14.Ra8 Ra8 15.Nd4 Nc5 16.d3 e5 17.Nb3 ef4 18.ef4 d5 19.Nc5 Bc5 20.d4 Bd6 21.cd5 Nd5 (better is 21...Bf4!? 22.g3 Be3 23.Kg2 Qd7=+ (23...Bd5? 24.Nd5 Nd5 25.Qb3+–)) 22.Nd5+/– Bd5 23.Bf3 Qb7 24.Bd5 Qd5 25.Qf3 Qf3 26.Rf3 Ra2 27.Bc3 Rc2 28.g3 Rc1 29.Kg2 Rb1 30.Rd3 Rb5 31.d5 Rb3 32.Re3 h6 33.Re8 Kh7 34.Be5 Bc5 35.d6 Rd3 36.Rd8 (36.Re7 A) < 36...Bd6 37.Rd7+/– (37.Rf7?! Be5 38.fe5 Kg6=); B) 36...Kg6 37.g4 Bd6=) 36...b5 (36...f6!?–/+) 37.d7 b4 38.Rc8 Rd7 (better is 38...Be7 39.Rc7 f6=) 39.Rc5+/– b3? 40.Rb5+– Rd2 41.Kh3 f6 (42.Bc3 Rd3 43.Rb3 Kg6+–; 41...Rd3 42.Kg4+–) +–. zobec – jones662, Live Game Caissa's Web, 2004.

5.b5 a5 6.a4 (6.Nf3 Nf6=) 6...Nf6 7.Nf3 d5 8.Be2 dc4 9.Bc4 Be7 10.0–0 0–0 11.Be2 Nbd7 12.d4 cd4 13.Nd4 Rc8 14.Bf3 Bf3 15.Qf3 Qc7 16.Nc6 Bb4 (16...Bd6 17.Rc1 Bh2 18.Kh1=) 17.Rc1 Qd6 18.Nc3 (18.Rd1 Qc5+–) 18...Nc5 (18...Ne5 19.Ne5 Qe5 20.Nd1=) 19.Ne2 (19.Na2 Nfe4 20.Nab4 ab4 21.Rc4+– (21.Nb4?! Nb3 22.Nc6 Nc1 23.Rc1 f5=)) 19...Nd3 (19...Nfe4 20.Rc4 f5 21.Be5+= (worse 21.Nb4 Nd2 22.Qf4 Nc4 23.Qc4 ab4–/+)) 20.Bf6 (better 20.Rd1 e5 21.e4+– (21.Nb4?! ab4 22.e4 Rfd8+–)) 20...Nc1+= 21.Rc1 (better 21.Ne7 Kh8 22.Nc1+= (22.Rc1? Rc1 23.Nc1 Qd2–+)) 21...Qd2?? (21...gf6 22.Qf6 Qd3 23.Nf4+= (23.Nb4?? Rc1 24.Nc1 Qd1)) 22.Rf1?? (better 22.Qg4 g6 23.Bd4+–) 22...gf6+= 23.Qf6 (23.Ng3 Qb2 24.Nh5 Kh8 25.Nf6 Qc2+–) 23...Qe2 24.g3?? (better 24.Qg5 Kh8 25.Qf6 Kg8 26.Qg5 Kh8 27.Qf6 Kg8=) 24...Qh5 25.Kg2 Rfd8 (better 25...Qd5 26.Kg1 Qd3–+) 26.Nd8 Qd5 27.Kh3 (27.Kh3 Qd8 28.Qf3–+). RichardSommer (2005) – gOdLikE_efRe (1995), lichess.org, 2020.

5.b5 a6 6.a4 ab5 7.ab5 Nf6 8.Ra8 Ba8 9.Nf3 d5 10.d4 dc4 11.Bc4 cd4 12.Bd4 (worse is 12.ed4 Bb4 13.Bc3 Bf3 14.gf3 Bc3 15.Nc3 0–0–/+) 12...Bb4 13.Ke2 Bf3 14.Kf3 0–0 15.Qb3 Be7 16.Rd1 (16.g3 Nbd7 17.Kg2 e5=) 16...Qc7+=.

5.bc5 bc5 6.Nf3 d5 7.Be2 Nf6 8.0–0 Bd6 9.Qb3 Bc6 10.Nc3 0–0 11.d4 cd4 (11...Nbd7!?=) 12.Nd4+= Qd7 13.cd5 Nd5 14.Nc6 Qc6 (better is 14...Nc6!? 15.Nd5 ed5+/–) 15.Nd5 +–.

4.c4 Nc6

5.b5 Nce7 6.Nf3 Ng6 7.Be2 Nf6 8.0–0 Be7 9.Nc3 0–0 10.a4 d5 (10...a6 11.d4=) 11.cd5 Nd5 12.Nd4 Nc3 13.Bc3 Ne5 (13...Bf6 14.Bf3 Bf3 15.Nf3= (worse 15.gf3 Bd4 16.Bd4 a6=+)) 14.f4 (14.Ne6 fe6 15.Be5 Bd6 16.Bd6 cd6+–) 14...Ng6 (14...Qd5 15.Rf2 Bh4 16.Rf3+=) 15.Bf3 Bf3 16.Qf3 (worse 16.gf3 Bc5=+) 16...Rc8 (16...a6 17.f5 Nh4 18.Qg4 ef5 19.Nf5 Nf5 20.Rf5+=) 17.Nc6 White prepares a5 17...Qe8 (17...Qd3 18.Na7 (worse 18.Ne7 Ne7 19.e4 Qf3 20.Rf3 c6+=) 18...Ra8 19.Nc6+–) 18.Na7+– Ra8 19.Nc6 Bd6 20.a5 ba5 21.Ra5 (21.Ba5 f6+–) 21...Ra5 22.Ba5 (22.Na5?! Qb5 23.Nc6 Qd3=) 22...Ne7 23.Ra1 (23.Bc3 Nc6 24.bc6 f6+–) 23...Nc6 24.Qc6 Qc6 25.bc6 Ra8 (25...Rb8 26.Bc3+–) 26.Bc3+– Ra1 27.Ba1 Kf8 28.d3 f6 29.g3 (29.g4 Ke7 30.Kf2 e5 31.fe5 fe5+–) 29...Ke7+– Black gets the initiative 30.e4 Bc5 31.d4 Bb4 32.Kg2 (better 32.e5!?+–) 32...Kd6+= 33.e5 (33.g4!?+=) 33...Kc6 34.ef6 gf6 35.d5 (35.Kf3!?=) 35...Kd5=+ 36.Bf6 c5 37.g4 (better 37.Kf3!?–/+) 37...c4 38.h4 (38.Kf3 c3–+) 38...c3 (38...Ke4 39.Kf2–+) 39.g5 (better 39.f5–+) 39...c2 40.Bb2 Bd2 41.h5 Bf4 42.Kf3 (42.g6 hg6 43.hg6–+) 42...Bg5 43.Kg4 h6 (43...h6 44.Kf3 Kc4–+) 0–1. RichardSommer (2120) – Lioresal (2235), lichess.org, 2020.

5.b5 Nce7 6.Qg4 Ng6 7.h4 Nf6 8.Qg5 h6 9.Qg3 Bd6 10.f4 h5 11.Bd3 Be4 12.Bf6 Qf6 13.Be4 Qa1 14.Bg6 fg6 15.Qg6 Kf8 16.Nf3 Qf6 (16...Qa2?? 17.Ng5 Qb1 18.Qb1+–) 17.Qe4 Ke7 18.Nc3 Qf5 19.Qd4 Rhg8 20.Ne4 Bc5 21.Qd3 d6 22.Rh3 Rad8 (better is 22...a6!? 23.Nc5 bc5 (23...dc5?! 24.Qf5 ef5 25.a4=) 24.Qf5 ef5–/+) 23.Rg3= d5 24.Nc5 bc5 25.Qa3 dc4 26.Rg5 Qb1 27.Kf2 Qb4 (27...Qb5 28.Rc5 Qe8 29.Rc7 Kf6 30.Qb2 Kg6 31.Ne5 Kh6 32.Nf7 Kg6 33.Qc2 Kf6 34.Nd8 Qd8 35.Rc4+–) 28.Qa7 Attacking the isolated pawn on c5 28...Rd2 29.Kg3 (29.Nd2?! Qd2 30.Kf3 Qd1 31.Kg3 Qe1 32.Kh2 Qh4 33.Kg1 Qe1 34.Kh2 Qh4 35.Kg1 Qe1 36.Kh2 Qh4=) 29...Rd7 30.Re5?? (better is 30.Qc5 Qc5 31.Rc5+/–) 30...c6–/+ (worse is 30...Qb5 31.Ng5 Rc8 32.Ne6=) 31.Qc5 Qc5 32.Rc5 cb5 33.a4? (better is 33.Rb5!? Rc8 34.Rg5–/+) 33...ba4–+ 34.Rc4 Ra7 35.Ne5 Kf6 36.Nc6 (36.Kf3–+) 36...Rc7 37.f5 (37.Na5 Rc4 38.Nc4 Rc8–+) 37...Rgc8 38.fe6 Rc6 39.Ra4 Re6 40.Kf4 Rce8 41.g4 (41.e4 Rf8–+) 41...hg4 42.Kg4 Re4 43.Re4 Re4 44.Kf3 Rh4 0–1. Rancic,D (1890) – Djoric,Krsta, Nis Open, 2011.

5.b5 Na5

6.Nf3 a6 7.ba6 Ba6 8.d3=.

6.Nf3 d5 7.Qc2 (7.cd5 ed5 8.Bc3 Nf6+=) 7...dc4 8.Bc4 Nc4 9.Qc4 Bf3 (9...Ne7 10.e4=) 10.gf3 Qd6 11.0–0 (11.Rg1 Ne7= (11...Qh2? 12.Qc6 Ke7 13.Qa8 Qg1 14.Ke2+–)) 11...Nf6 12.Ba3 Qd7 13.Bf8 Rf8 14.Nc3 Nd5 (14...Rc8 15.Rac1=) 15.Nd5 Qd5 16.Qc7 Qf3 (16...Qd2?? 17.Rfd1 Rd8 18.Rd2 Rd2 19.Qa7+–) 17.Rac1 Rd8 18.d4 Qd5 (18...Rd5 19.Rfd1 Qe2 20.Qb7=) 19.Qc6 Qd7 20.Rc3 Qc6 (20...Ke7 21.Ra3+=) 21.Rc6 (21.bc6 Ke7+/–) 21...Rc8?? (better is 21...Kd7+=) 22.Rc8 +–.

6.Nf3 Nf6 7.a4 h6 8.Nc3 Nh7 9.Be2 Ng5 10.Ng5 Qg5 11.Bf3 h5 (better is 11...Nc4!? 12.Bb7 Nb2+–) 12.Bb7+/– Nb7 13.Qf3 0–0–0 14.a5 (worse is 14.Qf7 Qg2 15.0–0–0 Nd6+=) 14...Kb8 15.a6 (worse is 15.Qf7 Qg2 16.0–0–0 Na5+=) 15...d5? (15...Nd6 16.Ba3 Qf5 17.Bd6 Qf3 18.Bc7 (worse is 18.gf3 Bd6 19.Ke2 Bb4+=) 18...Kc7 19.gf3+/–) 16.cd5 (better is 16.ab7 dc4 17.Ra4 +–.

6.Nf3 Nf6 7.Nc3 Be7 8.Bd3 Bc5 9.0–0 c6 10.Na4 cb5 11.Nc5 Bc6?? (better 11...bc5 12.cb5 c4+=) 12.Bf6+– gf6 13.Ne4 bc4 (13...Nc4 14.Bc4 bc4 15.Nd6 Ke7 16.Nc4+–) 14.Nd6 Ke7 15.Nc4 1–0. DEFFM – GuestBYRX, freechess.org, 2018.

4.c4 d5

5.b5 dc4 6.Nf3 Nd7 (6...a6 7.Bc4 ab5 8.Bb5 c6 9.Be2=) 7.Bc4 Qe7 (7...a6 8.ba6 Ba6 9.Ba6 Ra6 10.0–0=) 8.0–0 0–0–0 (8...Qb4 9.Qc2=) 9.a4 (9.d3+=) 9...Kb8 (better 9...Bf3!? 10.gf3 Qg5 11.Kh1 Ngf6=) 10.a5 (10.d3 Nh6+–) 10...f6 (10...Qb4!? 11.Qc2 Bf3 12.gf3 Qc5+–) 11.ab6 White gets the initiative 11...cb6 (11...Nb6 12.Be2 Nh6+–) 12.Qa4 Nc5 (12...Kc7 13.Qa2 Re8 14.Nd4+– (14.Qa7?! Ra8 15.Qa8 Ba8 16.Ra8 Kb7+–)) 13.Qa7 Kc8 (13...Kc7 14.Ra6! Kc8 15.Rb6+–) 14.Ba3 (better 14.Qb6 Qd6 15.Qa7 Qd7+–) 14...Qc7 (14...Bd5 15.Qb6 Qc7 16.Bc5 Bc5 17.Qa6 Kd7 18.Bd5 ed5+–) 15.Be2 (15.Bc5 Qc5 16.Be6 Kc7 17.d4 Qb5 18.Rc1 Kd6 19.Nc3+–) 15...Bd6 (15...Kd7!? 16.Bc5 Bc5+–) 16.d4 Nb3 (16...Bf3 17.Qc7 Bc7 18.Bf3+–) 17.Bd6 Rd6 18.Ra3 Na5 (18...Bf3 19.Qc7 Kc7 20.Bf3 Na5 21.Rc1 Kd7+–) 19.Rc3 Bc6 20.Qc7 (20.Qa6 Bb7 21.Rc7 Kc7+–) 20...Kc7 21.bc6 (21.Rc6?! Nc6 22.Rc1 Nge7+–) 21...Rc6 22.Rfc1 Rc3 (22...Ne7 23.Bb5 Rc3 24.Nc3+–) 23.Rc3 (23.Nc3!? Ne7 24.Nd5 Kd6 25.Ne7 Ke7 26.Rc7 Kd6 27.Rg7 Rc8+–) 23...Kb7 24.Na3 Ne7 25.Nb5 Nd5 26.Rc1 Rd8 (26...Kb8 27.Bd3+–) 27.Nd2 (27.e4 Nb3 28.Rc2 Nf4+–) 27...f5 (27...h6 28.Kf1+–) 28.Bf3 (28.Nf3 h6+–) 28...g5 (28...h6 29.g4 g6 30.e4 fe4 31.Ne4+–) 29.Bd5 (29.e4!? fe4 30.Ne4 h6+–) 29...Rd5 30.Nc7 Rd6 31.Ne8 Rc6 32.Rc6 Kc6 (32...Nc6 33.Nd6 Kc7 34.Nf7+–) 33.Nf6 Kd6 34.Nh7 g4 35.Ng5 b5 36.Nf7 Ke7 37.Ne5 Nc4 (37...b4 38.Kf1+–) 38.Nb1 (better 38.Nec4 bc4 39.Nc4 Kf6+–) 38...Ne5 39.de5 Kd7 (39...Kf7 40.Nd2+–) 40.f4 Kc6 (40...gf3 41.gf3 Kc6 42.Kf2+–) 41.Kf2 (41.Na3 Kc5 42.Nb5 Kb5+–) 41...Kc5 (41...b4 42.h4 gh3 43.gh3+–) 42.h4 b4 (42...gh3 43.gh3 Kc6+–) 43.h5 Kb6 44.h6 Kc5 45.h7 b3 46.h8Q Kd5 47.Qe8 (47.Qe8 Kc5 48.Qe6 b2 49.Qd6 Kb5 50.Qd5 Kb6 51.e6 Ka7 52.e7 Kb6 53.Qd4 Kb5 54.e8Q Ka6 55.Qc6 Ka5 56.Qdc5; 47.Qc8 g3 48.Ke2 Ke4 49.Qc6) 1–0. RichardSommer (2090) – rapidfire23 (2025), lichess.org, 2020.

5.d4 dc4 6.Bc4?? (6.a3 b5+=) 6...Nc6 (better is 6...Bg2 7.Nf3 Bh1–+) 7.b5 Na5 8.Bd3?? (8.Bf1=) 8...Qe7 (better is 8...Bg2 9.Ba3 Ba3 10.Na3 Bh1–+) 9.Nf3+=.

5.cd5 Bd5 6.Nf3 Nf6 (6...Bb4?? 7.Bg7 Ne7 8.Bh8+–) 7.b5 Be7 8.Be2 0–0 9.0–0 Ne4 10.Nc3 Nc3 11.Bc3 Bf6 (11...c6 12.bc6 Bc6 13.Qc2=) 12.Bf6 Qf6 13.d4 Nd7 (13...c6 14.a4=) 14.a4 (14.Qc2 Rfc8+=) 14...Rfd8 15.Rc1 Rac8 16.Bc4 Bf3 17.Qf3 Qf3 18.gf3 Nf6 19.Rc2 Nd5 (better is 19...c5!? 20.bc6 Rc6=) 20.Bd5 +/–.

5.Nf3 Bb4?? 6.Bg7 dc4 7.Bc4 +–.

5.Nf3 Nd7 6.Be2 Ngf6 (6...Bb4?? 7.Bg7 dc4 8.Bc4+–) 7.a3 c5 8.b5 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Be7 12.0–0 0–0 13.d3 dc4 14.dc4 Qa8 15.Nbd2 Rd8 16.Qc2 Nf8 17.Be5 N8d7 18.Bc3 Qb8 19.Bd3 Nf8 20.Bf6 Bf6 21.Ne4 Be4 22.Be4 Qd6 23.g3 h6 24.Kg2 Qe7 25.Rd1 Rd1 ½–½. Hal1958 – HOTSUN, playchess.de, 2004.

4.c4 d6

5.Nf3 d5 6.cd5 Qd5 7.Nc3 Qd7 8.Be2 (8.Ne5!? Qd6 9.Nb5+=) 8...Bb4= 9.0–0 Bc3 10.Bc3 f6 11.Nd4 Qd5?? (better 11...c5 12.Nb3 Ne7=+) 12.Bh5 Ke7 13.Bf3 Qf3 14.Nf3 Bf3 1–0. GuestDGHQ – GuestGNFV, freechess.org, 2017.

5.Nf3 Nd7 6.Be2 c5 7.b5 (7.bc5 dc5 8.0–0 Ngf6=) 7...Ngf6 8.Nc3 d5 (8...Be7 9.0–0=) 9.0–0 (9.cd5 ed5 10.d4 c4=) 9...Bd6 (9...dc4 10.Qa4=) 10.Qc2 (10.cd5 ed5 11.Qc2 0–0=) 10...dc4 11.Bc4 0–0 12.Be2 Qc7 13.h3 (13.Rfc1 Rfd8=) 13...Rac8 (13...Rfd8 14.Rfc1=) 14.a4 (14.d3 Rfd8=) 14...Rfd8 (14...c4 15.Rfc1=) 15.d3= c4 16.dc4 Bf3 17.Bf3 Qc4 (17...Ne5 18.Ne2=) 18.Be2 (18.Rfd1 Qc7=) 18...Qc5 (18...Qb4 19.Rfc1=) 19.Rac1 Be5 (19...Qe5 20.g3=) 20.Qb3 Qe7 21.Ba3 (21.Rfd1 Bc3 22.Rc3 Nc5=) 21...Bd6 (21...Nc5 22.Qc2=+) 22.Bb2 (22.Bd6 Qd6 23.Rfd1 Qe7=) 22...Nc5 23.Qa2 h6 (23...Qc7 24.Rfd1=) 24.Rfd1 Be5 25.f4 Bd6 26.Bf3 (26.Bc4 Rd7=) 26...e5=+ 27.Nd5 (27.fe5 Qe5 28.Nd5 Qh2 29.Kf1 Nfe4–/+) 27...Nd5 28.Bd5 ef4 29.e4 Ne4 30.Rc8 Rc8 31.Re1 f3 (31...Bc5!? 32.Kh2 Be3–/+) 32.Re4 (32.Be4 Qh4 33.Kf1 fg2 34.Bg2 Qf4 35.Kg1 Qh2 36.Kf1 Bc5–+) 32...Qg5=+ 33.Rg4?? (33.Bf7 Kh8 34.Bg7 Qg7 35.Bc4–+) 33...Qe3 (33...Qe3 34.Kf1 Qe2 35.Kg1 Qe1) 0–1. GuestKDZJ – GuestCTCP, freechess.org, 2017.

4.c4 Qe7

5.a3!?=.

5.c5 bc5+= 6.bc5 (6.b5 e5+=) 6...Qc5 7.Qb3 (7.Bd4 Qd6–/+) 7...Bd5 (7...Qb6 8.Nf3–/+) 8.Qc3 Qc3 (8...Qb6 9.Qc1–/+) 9.Nc3+= Bb7 10.Nf3 (10.Rb1 Nc6+=) 10...a6 (10...Bf3 11.gf3 Nf6 12.Rb1–/+) 11.Be2 Nc6 12.0–0 (12.a3 Nf6+=) 12...Nb4 (12...Nf6 13.Rab1+=) 13.Nd4 (13.a3 Nd5+=) 13...g6 (13...Rb8!?–/+) 14.a3= Nd5 (14...e5 15.Nf3 Bf3 16.Bf3=) 15.Nd5 (15.Ne6 de6 16.Nd5 Bd5 17.Bh8 Bd6+–) 15...Bd5? (15...ed5 16.Rfc1 Kd8 17.Nc6 Bc6 18.Bh8 Bb5+/–) 16.Ne6!+– Be6 (16...Be6 17.Bh8 Discovered attack; 16...de6 17.Bh8 Discovered attack; 16...fe6 17.Bh8 Discovered attack) 17.Bh8 Nh6 (17...Ne7 18.Rfb1+–) 18.Rfc1 Rb8 (18...c6+–) 19.Rc7 Nf5 (19...Ra8 20.Be5+–) 20.Ba6 d5 (20...Bd6 21.Rc8 Rc8 22.Bc8+–) 21.Be5 (21.a4 Bd6 22.Ra7 Bc5+–) 21...Ra8 (21...Bd6 22.Bd6 Nd6 23.Rac1+–) 22.Bb5 Kd8 23.Rc3 (23.Rcc1 Bd7 24.a4 h6+–) 23...Ke7 (23...Bd7 24.Be2 Nd6+–) 24.Rc7 (24.Rac1!? Ra7+–) 24...Kd8 25.Rc3 d4?? (25...Ke7 26.Rac1 Ra7+–) 26.Rd3 f6 (26...Ke7 27.g4 Nd6 28.Bd6 Kd6 29.Rd4 Ke7 30.Re4+–) 27.Bf6 Be7 28.Be7 (better is 28.Bd4!? Nd4 29.Rd4 Kc7 30.Rc1 Kb6+–) 28...Ke7 29.a4 de3 (29...h6 30.Re1 Bd5 31.e4 Be4 32.f3+–) 30.de3 h5 (30...Nd6 31.Bc6 Ra6 32.Rc1+–) 31.h3 (31.Rc1 g5+–) 31...Kf7 (31...Nd6 32.Rc1 Nb5 33.ab5+–) 32.a5 Kf6 (32...Ke7 33.a6 Nd6 34.Bc6+–) 33.a6 (33.e4 Ne7+–) 33...Kg5 (33...g5 34.e4 Ne7 35.Ra5+–) 34.Bc6 (34.f4!? Kf6+–) 34...Ra7 35.Bb7 Bc4 36.Rc3 Nd6 37.g3 (37.f4 Kh6+–) 37...Kh6 (37...Be6 38.Rc6 Nb7 39.Re6+–) 38.f3 (38.f4 Kg7+–) 38...Be2 (38...Kg5 39.Kf2+–) 39.Kf2 Bb5 40.e4 (better is 40.Rb3 Kg7+–) 40...Nb7 41.ab7 Rb7 42.Rb1 Rb6 (42...Ba6 43.Rb7 Bb7+–) 43.Rc5 Ra6 (43...Kg7 44.e5+–) 44.Rcb5 1–0. gtate (1845) – maf (2015), net–chess.com, 2003.

5.Ne2 Nc6 (5...Qb4!? 6.Qc2 Nf6–/+) 6.b5 Na5 7.Ng3 d5 (7...Nf6 8.f3=) 8.cd5+= ed5 9.Be2 (9.Qf3 d4 10.Qf4 de3 11.de3 Qb4 12.Qb4 Bb4 13.Nc3 Nf6+=) 9...Nf6 10.0–0 g6 (10...Nc4 11.Bc4 dc4 12.Qa4+=) 11.e4 (11.Qa4 c5+–) 11...Nc4 (better 11...de4!? 12.f3 Rg8=) 12.Bc4+– dc4 13.Qc2 (better 13.Qa4+–) 13...Be4?? (better 13...c5+–) 14.Ne4+– Bg7 (14...Qe4 15.Qe4 Ne4 16.Bh8+–) 15.Re1 (15.Re1 0–0–0 16.Qc4 Ne4 17.Bg7+– (17.Qe4?? Qe4 18.Re4 Bb2–+; 17.Re4?! Qe4 18.Qe4 Bb2+–)) 1–0. aravind555 (1605) – smallman (1620), lichess.org, 2019.

5.Nf3 Qb4!? 6.Ba3 Qa5 7.Bf8 Kf8+=.

5.a3 f6

6.Nc3 g5 (6...a5 7.b5+=) 7.f3 Bg7 8.d4 Nc6 9.Bd3 h5 10.Bg6 Kd8 11.Qa4?? (better is 11.Bd3+=) 11...f5 –+.

6.Nf3 c5 7.bc5 bc5 8.d4+=.

6.Nf3 g5 7.d4 Bg7 8.c5 h5 9.Nbd2 g4 10.Nh4 Qf7 11.Bc4 (11.Rc1 bc5 12.Rc5 Kd8+/–) 11...d5 (11...f5!? 12.f3 Qf6+=) 12.cd6!+/– cd6 13.0–0 d5 14.Bd3 f5 15.Rc1 (15.f4!?+/–) 15...Bf6=.

6.Nf3 g5 7.Ng5!? Kd8 8.Qh5 +/–.

6.f4 h6 7.Nf3 g5 8.fg5 hg5 9.Bd3 Bg7 10.Bg6 Kd8 11.0–0 f5 12.Qb3 (12.Ne5!? Be5 13.Be5–/+) 12...g4 13.Ne5 Kc8 (better is 13...Be5 14.Be5 Rh6 15.Bf5 ef5 16.Rf5 Qe6–/+) 14.g3? (better is 14.Nf7 Bb2 15.Qb2=) 14...Rh6 –+.

4.c4 Ne7

5.b5 Ng6 6.Nf3 c6 7.a4 c5 8.Be2 d5 9.0–0 f6 10.d4 Be7 11.Nbd2 0–0 12.Qb3 dc4 (12...a6 13.Rfb1+=) 13.Bc4+/– cd4 (13...Bd5!?+/–) 14.Be6 Kh8 15.Nd4 Nd7 16.Bc4 Nc5 17.Qc2 Ne5 18.N2b3?? (18.Ne6 Ne6 19.Be6 Bc8+/–) 18...Qc8 (better is 18...Be4 19.Qc3 Nc4 20.Qc4 Bd5+=) 19.Be2 Rd8 20.Rfd1 h6 21.Rac1 Bg2?? 22.Kg2+– Qb7 23.f3 Nb3 24.Qb3 g5 25.Nc6 Rd1 26.Bd1 g4 27.f4 Nc6 28.Rc6 Rf8 29.Bg4 Bc5 30.Qe6 Qe7 31.Qe7 Be7 32.Kf3 Bc5 33.Rf6 Rf6 34.Bf6 Kh7 35.Be5 Kg6 36.Bb8 h5 37.Bd7 (37.Bd7 Kf7 38.Ba7+–) 1–0. carocan (1755) – jjnn, kurnik, 2011.

5.b5 Ng6 6.Nf3 f6 7.d4 Be7 8.Bd3 0–0 9.Nbd2 f5 10.0–0 Bh4 11.a4 f4 (11...a6 12.Qc2+=) 12.e4 (12.Qc2 a6+/–) 12...Be7 13.Qc2 White prepares c5 13...Nh4 (13...Bb4 14.c5+/–) 14.c5 bc5 15.dc5 c6 (15...a6 16.Rfb1+/–) 16.Nd4 (16.Nh4 Bh4 17.e5 h6+–) 16...e5 17.Nf5 (17.N4f3!? Nf3 18.Nf3+–) 17...Nf5+/– 18.ef5 cb5 19.ab5 d6? (better is 19...Qc7 20.Qc4 Kh8+–) 20.c6+– Bc8 (20...a5+–) 21.Nc4 a6? 22.Ne5! Rf6?? 23.c7 Qf8 24.cb8Q Rb8 25.Nc6 Rb6 26.Bf6 Bf6 27.Nd4! Bd4 28.Qc4 Kh8 29.Qd4 Qd8 30.ba6 Ba6 31.Ra6 Ra6 32.Ba6 Qa8 33.Bd3 f3 34.Qd6 fg2 35.Rb1 h5 36.Rb8 Qb8 37.Qb8 Kh7 38.f6 Kh6 39.Qh8 Kg5 40.Qg7 (40.Qg7 Kf4 41.Qg3#) 1–0. carocan (1635) – 56ctx56, kurnik, 2012.

5.b5 Ng6 6.Nf3 f6 7.Be2 Bd6 8.0–0 0–0 9.d4 Qe7 10.Nbd2 c6 11.a4 e5 (11...Bb4 12.Qc2+=) 12.Nb3 e4 13.Nfd2 Bc7 14.Qc2 f5 15.c5 d5 16.Ba3 Rf7? (better is 16...Qh4 17.h3 Rf7=) 17.cb6+– Bb6?? (17...Bh2 18.Kh2 Qh4 19.Kg1 ab6+–) 18.Be7 Re7 19.Nc5 cb5 20.Nb7 Rb7 21.ab5 Nd7 22.Qb3 Nf6 23.f3 h5 24.fe4 Ne4 25.Ne4 fe4 26.Qd5 Kh7 27.Qb7 (27.Qb7 Re8 28.Rf5+–; 27.Qh5 Kg8 28.Bc4 Rf7 29.Rf7 Rc8 30.Rc7 Kf8 31.Qf5 Ke8 32.Qc8) 1–0. carocan (1745) – jjnn, kurnik, 2011.

5.b5 Ng6 6.Nf3 Nh4 7.Nh4 Qh4 8.a3 Bd6 9.d4 a6 10.Nd2 ab5 11.cb5 0–0 12.a4 f5 (12...Bh2? 13.Nf3 Bf3 14.Qf3+– (14.gf3?! d5+=)) 13.Ba3 f4 14.e4 Ba3 15.Ra3 c6 16.Rh3 Qf6 17.e5 Qf5? (17...Qg6 18.Rg1 Qg5 19.Ne4+/–) 18.Nf3?? (better is 18.Bd3 Qg5 19.Bh7 Kf7 20.Rh5+–) 18...cb5= 19.ab5 Ra2 20.Bd3 Be4 (20...Be4 21.Nh4 Qh3 22.gh3 Bd3 (22...Bh1 23.Qb1 Ra4 24.Bh7 Kh8 25.Ng6 Kh7 26.Nf8 Kg8 27.Nh7+–) 23.Qd3 Ra1 24.Ke2 Rh1=) 0–1. typ48 (1610) – janusz50 (1615), kurnik, 2012.

5.Nf3 d6 6.Be2 Nd7 7.0–0 Rg8 8.Nc3 Ng6 9.Rc1 Be7 10.d4 Bf6 11.Bd3 Qe7 12.Qc2 Nh4? (12...Bf3 13.gf3 Nh4 14.f4+=) 13.Ne1 g6 14.f3 h5 15.e4 (15.Nb5 Kd8+/–) 15...g5 (better is 15...Bd4!? 16.Kh1 g5+=) 16.d5 g4 17.de6 fe6 18.f4 Bd4 19.Kh1 Ng6 20.Ne2 (better is 20.e5!? Nh4 21.ed6 cd6 22.Nb5 Bb2 23.Qb2+/–) 20...Bb2= 21.Qb2 e5 22.f5 Ngf8 23.Ng3 (better is 23.c5!? Nf6 24.Bb5 c6 25.cb6+/–) 23...Nf6 24.c5 h4 (worse is 24...bc5 25.bc5 Bc8 26.Bb5 Bd7 27.Bc4+–) 25.cd6 Qd6 26.Bb5 c6 27.Bc6?? (better is 27.Bc4 hg3 28.Rd1–/+) 27...Bc6–+ 28.Rc6 Qc6 29.Qe5 Kf7 30.Ne2 N8d7 31.Qb2 Qe4 (worse is 31...Ne4 32.Qb3 Kg7 33.Nd4–+) 32.Nf4 h3 33.Qb3 Ke7 34.Ng6 Rg6 (better is 34...Kd8 35.Nf4–+) 35.fg6 hg2 36.Ng2 Qg6 37.Qe3 Kf7 38.Nf4 Qe4 39.Qe4 Ne4 40.Kg2 1–0. slax1 – zyga55zyga, kurnik, 2011.

5.Nf3 f6 6.Be2 d5 7.cd5 Bd5 8.a3 Nd7 9.Nc3 Bb7 10.0–0 Nd5 11.Ne4 Be7 12.Qc2 0–0 13.Rac1 Rc8 (better is 13...c5!? 14.bc5 Rc8=) 14.Nd4+/– c5? (better is 14...Kf7 15.Nc3 f5 16.Nd5 Bd5+/–) 15.Ne6+– Qc7 (15...cb4 16.Qb3 Rc1 17.Rc1 Qb8+–) 16.Nc7 Rc7 17.Qb3 Rfc8 (17...Kh8 18.b5+–) 18.Bc4 Kh8 19.Bd5 c4 20.Bb7 cb3 21.Bc8 Rc1 22.Rc1 Nf8 23.Ba6 h6 24.Bc4 Kh7 25.Bb3 f5 26.Ng3 Kg6 27.Rc6 Kg5 28.h4! Kh4 29.Nf5 (29.Nf5 Kh5 30.Ng7 Kh4 31.Bd1 Ne6 32.Rc4 Nf4 33.Rf4 Kg5 34.Rg4#) 1–0. slax1 – zorro5, kurnik, 2011.

5.Nf3 Ng6 6.b5 Be7 7.Bg7+/– Rg8 8.Bb2 f5 9.d4 f4 10.e4 (10.Nc3!?+/–) 10...Be4+= 11.Bd3 Bb7 12.Ne5 (better is 12.0–0!?+=) 12...Ne5–/+ (12...Bg2?! 13.Qh5 Bb4 14.Nc3+=) 13.de5 Rg2?? (13...Bb4 14.Nc3 A) worse is 14...Rg2 15.Qh5 Kf8 16.Qh7+= (worse is 16.Bh7 Qg5 17.Qg5 Rg5–/+); B) 14...Bg2?! B1) worse is 15.Bh7 Qh4 (15...Bh1 16.Qh5 Ke7 17.0–0–0+=) 16.Bg8 Bh1+=; B2) 15.Qh5 Kf8 16.Rg1=; C) 14...Qh4–/+) 14.Qh5+= Kf8 15.Qh7 (15.Bh7 Bb4 16.Kf1 Qe7–/+) 15...Bc5? (15...Bb4!? 16.Nd2 Qg5+=) 16.Qh8 (16.Qh6 Kf7 17.Qf4 Ke8+–) 16...Ke7 (better is 16...Rg8 17.Qh6 Kf7 18.Qf4 Ke8+/–) 17.Qh4?? (better is 17.Qf6 Ke8 18.Bg6 Rg6 19.Qg6 Ke7 20.Qh7 Ke8 21.Rg1+–) 17...Ke8= 18.Rf1?? (better is 18.Qh5 Ke7 19.Ba3=) 18…Qh4–+ (18...Qh4 19.Kd1 Bf2–+) 0–1. carocan (1660) – 56ctx56, kurnik, 2012.

5.Nf3 Ng6 6.b5 Nh4 7.Nh4 Qh4 8.Nc3 Bd6 9.g3 Qh6 10.f3? (10.e4 0–0=) 10...a6 (10...Bg3 11.Ke2–+) 11.a4? (better is 11.Bg2=) 11...Bg3!–+ 12.Ke2 Be5 13.f4?? Bf6 14.Rg1 Qh2 15.Bg2 Bg2 16.Rg2 Qg2 17.Kd3 ab5 18.ab5 Ra1 19.Ba1 0–0 20.Ne2 Ba1 21.Qa1 c6 22.Qa7 cb5 23.cb5 Qd5 24.Nd4 d6 25.Qb6 e5 26.e4 Qd4 27.Qd4 ed4 28.Kd4 Rd8 29.Kd5 Kf8 30.d4 White prepares the advance e5 30...Ke7 31.e5 de5 32.Ke5 h5 (32...h5 33.Ke4 h4–+) 0–1. typ48 – utyman, kurnik, 2012.

5.Nf3 Ng6 6.Be2 Nh4 7.0–0 Bd6 8.g3 (worse is 8.Bg7 Rg8 9.c5 bc5 10.bc5 Rg7 11.cd6 Rg2 12.Kh1 Rg6–/+) 8...Ng6 (better is 8...Nf5!? 9.d3 0–0=) 9.Bg7+/– Rg8 10.Bc3 h5 11.d4 h4 12.c5 hg3 13.fg3 Bg3? (better is 13...Be7+/–) 14.hg3+– Nh4 15.Kf2 (15.Nh4 Qh4 16.Bf3 Qg3 17.Kh1 Rh8#) 15...Nf5 16.Rg1 Nc6 17.Nbd2 Qe7 18.e4 Nh6 19.d5 ed5 20.ed5 Ng4 21.Ke1 Nce5? 22.Ne5 Ne5 23.Be5 Qe5 24.Nf3 Qc3 25.Kf2 Qb4 26.c6! dc6 27.dc6 Bc6 28.Qd3 Qc5 29.Qe3 Qe3 30.Ke3 0–0–0 31.Rac1 Rge8 32.Kf2 Bf3 33.Kf3 Rd2 34.Ba6 Kb8 35.Rge1 Re6 36.Re6 fe6 37.Rh1 c5 38.Ke4?? Ra2+= 39.Bc4?? Ra3 40.Be6 Rg3+= 41.Kd5 Kb7 42.Rh7 Ka6 43.Bc8 (43.Bc8 Kb5 44.Ra7 Rg5 45.Ke4–/+). typ48 – utyman, kurnik, 2012.

4.c4 f5

5.a3 Nf6=.

5.b5 Nf6 6.a4 a5 (6...Be7 7.Nf3=) 7.Nf3 Bb4 8.Be2 0–0 9.0–0 d6 10.Nd4 Qe8 (10...Qd7 11.Nc2=) 11.Bf3+= Bf3 12.Qf3 Nbd7 13.Nc6 Nc5 14.Nc3 (14.Bf6 Rf6 15.d4 Ne4+=) 14...Kh8 (14...Nfe4 15.Qd1=+) 15.Qe2 (15.d4 Nce4 16.Ne4 fe4+=) 15...Bc3 (15...Nfe4!?=) 16.Bc3+= Qg6 17.f4 (17.Bf6 Qf6 18.d4 Nd7+=) 17...Nfe4 18.Bd4 Rae8 (18...Nb3!? 19.Ra3 Ned2= (worse 19...Nd4 20.ed4 Rfe8 21.Re3+–)) 19.d3+– Nf6 20.h3 (20.Bc5!? dc5 21.Ne5+–) 20...Nh5 21.Qf3 (better 21.Qc2+=) 21...e5?? (better 21...Nd3 22.Rad1 e5 23.fe5 de5–/+) 22.fe5 (22.Bc5 e4 23.de4 fe4+–) 22...de5 (22...Ng3 23.Rfb1+–) 23.Bc5 bc5 24.g4 (24.Kh2 Qh6+–) 24...h6 (24...f4 25.Rfe1+–) 25.Kh2+– fg4 26.Qg4 (26.Qf8 Rf8 27.Rf8 Kh7=+) 26...Qd6? (26...Qg4 27.Rf8 Rf8 28.hg4 Nf6+–) 27.Rf8 (27.Qh5 e4 28.Kh1 ed3 29.Na5 d2+–) 27...Rf8 28.e4?? (28.Qh5 Qd3 29.Ne5 (29.Qe5?! Qe2 30.Kh1 Qf3 31.Kh2 Qf2 32.Kh1 Qf3 33.Kh2 Qf2 34.Kh1 Qf3=) 29...Rf2 30.Kg1 Qe3 31.Ng6 Kh7 32.Qe5+–) 28...Nf4 (better 28...Qd3 29.Rg1 Rf2 30.Rg2 Rg2 31.Qg2 Qc4–/+) 29.Rg1 Do you see the mate threat? (worse 29.Na5 Qd3 30.Ra2 Rf6–+) 29...g6 30.Qh4 (30.Na5 Qd3 31.Nc6 Qc2 32.Kh1 Nd3–+ (32...Qc4?! 33.Qf3–/+)) 30...Qd3? (better 30...Kh7 31.Rd1 A) 31...Nd3?? A1) 32.Na5 Qd4 33.Rd3 Qb2 (33...Qd3?! 34.Qe7 Kg8 35.Qe6 Kg7 36.Qe5 Rf6 37.Nc6 Qe2 38.Kh1 Qf1 39.Kh2–+) 34.Kg1 Qb1 35.Kh2 Qc2 36.Kg1 Qd3 37.Qe7 Kg8 38.Qe6 Rf7–+; A2) 32.Qg3+–; B) 31...Ne2=) 31.Qh6+– Kg8 32.Rg6! Ng6 33.Qg6 Kh8 34.Qh6 Kg8 The mate threat is Rf2 35.Ne7?? (35.Qg5 Kh7 36.Qh5 Kg7 37.Qe5 Kh6 38.Qe6 (38.Qc7?? Rf2 39.Kg1 Qf1; 38.Qc5 Qe2 39.Kh1 Qf1 40.Kh2 Rg8 41.Qf8 Qf8 42.h4 Qf4 43.Kh3 Qg3) 38...Kh7 39.Qe7 Kg8 40.Qg5 (40.Qc7?? Rf2 41.Kg1 Qf1) 40...Kh8 41.Qh4 (41.Na5?? Rf2 42.Qg2 Qf3 43.Qf2 Qf2 44.Kh1 Qe1 45.Kh2 Qa5–+; 41.Qc5?? Qc2 42.Kh1 Rf1 43.Qg1 Qe4 44.Kh2 Rg1 45.Kg1 Qc4–+) 41...Kg7 42.Qg3 Qg3 43.Kg3+–) 35...Kf7–/+ 36.Qe6?? (better 36.Nc6 Qe2 37.Kh1 Qe4 38.Kh2–/+) 36...Ke6 37.Nf5 Rf5! 38.ef5 Kf5 39.h4 (39.b6 Kf4 40.bc7 Qg3 41.Kh1 Kf3 42.c8Q Qg2) 39...Kf4 40.h5 Qg3 41.Kh1 Kf3 (41...Kf3 42.b6 Qg2) 0–1. RichardSommer (2140) – comandante_en_jefe (2155), lichess.org, 2020.

5.Nc3 Bb4 6.Nd5 Bf8 7.Qh5 g6 8.Qh3 ed5 9.Bh8 +/–.

5.Nc3 Nf6 6.a3 Be7 7.Nf3 0–0 (7...a5 8.b5=) 8.d4 (8.Be2 a5 9.b5 c6=) 8...Ne4 (8...a5 9.b5=) 9.Bd3 Nc3 (9...a5 10.b5=) 10.Bc3+= Qe8 11.0–0 Qg6 12.Rc1 (12.Qe2 d6+=) 12...d6= 13.Qe2 Nd7 (13...Be4 14.Rfd1=) 14.Rfe1 Nf6 15.d5 Ne4 16.Bb2 e5 17.a4 (17.Nd2 c6=) 17...c6 18.dc6 Bc6 19.b5 Bb7 20.Red1 Nc5 21.Bc2 a5 (21...a6 22.Ba3+=) 22.Ne1 (22.Ba3 Rac8=) 22...Rad8 23.g3 (23.Nf3 Bf6 24.Rb1 Rfe8=) 23...Qe6 24.Ng2 g5 (24...d5 25.cd5 Bd5 26.Ba3+=) 25.Qh5 g4 26.Ba3 Ne4 (26...Qg6 27.Qg6 hg6 28.Rd2+=) 27.Nh4 (27.Bd3 Rf6 28.Nh4 Rdf8 29.Nf5 Qf5 30.Qf5 Rf5 31.Be4 Be4–+) 27...Ng5 28.Bd3 Nh3 (28...Rc8 29.Bf1 Nf3 30.Nf3 Bf3 31.Bd3 Bd1 32.Rd1–/+) 29.Kf1 f5 becomes the focus of attention 29...Bg5 (29...Be4 30.Rd2+=) 30.Ke1 (better is 30.Rd2!?=) 30...Be4 31.Bf1 Bh4 32.Qh4 Ng1 33.Be2 (33.Qh5!?–/+) 33...Bf3–+ 34.Bd3 Bd1 35.Kd1 Nf3 36.Qh5 d5 37.Ke2 e4 38.Bb1 Rf6 (38...Rf6 39.cd5 Qd5–+) 0–1. Wall,Bill – Kucharkowski,Jens, Carel CF–01 Correspondence, 2005.

5.Nf3 Bb4?? 6.Bg7 Nf6 7.Bh8 +–.

5.Qh5 g6 6.Qd1 Nf6 7.b5 (7.a3 a5=) 7...Bg7 (7...a6 8.Nf3=) 8.Nf3 d6 (8...0–0 9.Be2=) 9.d4 (9.Nc3 0–0=) 9...Nbd7 (9...a6 10.Be2=) 10.Be2 Qe7 (10...0–0 11.Ng5 Qe7 12.Bf3=) 11.Nc3 (11.0–0 0–0=) 11...0–0 12.0–0 e5 (12...a6 13.Rc1=) 13.Qb3+= Kh8 (13...c5 14.bc6 Bc6 15.c5 d5 16.cb6+/–) 14.Rfb1 (14.de5 de5 (< 14...Ne5 15.Ne5 Qe5 16.Nd5+–) 15.Nd5 Nd5 16.cd5 Nc5=+) 14...e4 15.Ne1 f4 16.ef4 e3 (16...Ne8 17.Rd1+=) 17.f3 Nh5 (17...a6 18.Nc2+=) 18.g3 (18.Ne4 Nf4 19.Qe3 Ne2 20.Qe2 Rae8+=) 18...g5 19.fg5 Qg5 20.Ng2 Bf3 21.Bf3 Rf3 22.Nd5 Ng3 (22...Re8 23.Re1+/–) 23.hg3 Qg3 (23...Re8 24.Re1 Qg3 25.Re2–+ (25.Nc7?? Rf2 26.Ne8 Qg2; 25.Re3? Qf2 26.Kh2 Ree3 27.Nde3 Bh6–+; 25.Nde3 Qf2 26.Kh2 Re6–+)) 24.Rf1+– (24.Nde3 Qf2 25.Kh2 Bh6 26.d5 Ne5 27.Be5 de5–+) 24...Raf8 25.Rf3 (25.Nde3 Bh6 26.d5 Ne5 27.Bd4 Be3 28.Qe3 Re3 29.Rf8 Kg7 30.Raf1–+) 25...Rf3=+ 26.Qc2 (26.Re1 Nf6 27.Qe3 Re3 28.Nde3–+) 26...Rf2–/+ 27.Qe4 Rb2 28.Rf1 Qg6 (28...Bh6 29.Qe8 Qg8 30.Qg8 Kg8 31.Nge3 Be3 32.Ne3 Ra2 33.Nd5–/+) 29.Qg6 hg6 30.Rf7 Bd4 31.Nge3? (31.Rd7 e2 32.Kh1 Rb1 33.Kh2 Be5 34.Ndf4–+) 31...Ne5–+ 32.Rc7 Ng4 (33.Re7 Ne3 34.Ne3 Re2–+ (34...Ra2?! 35.Re4 Rd2 36.Kf1–+); 32...Ra2?! 33.Kf1–+) 0–1. Dziel,Jaromir – Kucharkowski,Jens, corr 3GMM–53, 1997.

4.c4 f6

5.a3 c6 6.d4+= d5 (6...c5 7.bc5 bc5 8.Nf3+=) 7.c5 (7.Bd3 Ne7+=) 7...bc5 (7...a5 8.Bd3=) 8.bc5 Be7 (8...Ba6 9.Ba6 Qa5 10.Bc3 Qa6 11.Nh3+=) 9.Qb3 (9.Bd3 Nh6+=) 9...Ba6 (9...Bc8 10.Nd2+=) 10.Ba6 Na6 11.Qb7 (better 11.Qa4 Qc8 12.Nc3+=) 11...Nc7? (11...Qc8 12.Qc8 Rc8 13.Nc3=) 12.Nc3 (12.Qc6 Qd7 13.Qd7 Kd7+–) 12...Nh6 (12...Qd7 13.Nf3=) 13.Rb1 (13.Qc6 Qd7 14.Qd7 Kd7+–) 13...0–0 (13...Qd7 14.Nf3+=) 14.Nf3 (14.Qc6 e5 15.Nge2+–) 14...Ne8? (14...Qd7!? 15.Bc1 e5=) 15.0–0 (15.Qc6 Nc7+–) 15...Rb8 (better 15...Qc8!? 16.Bc1 Qb7 17.Rb7 Rf7+–) 16.Qc6+– Rc8?? (16...Nc7 17.Ba1 Nf7 18.Rb8 Qb8 19.Rb1+–) 17.Qa4 (better 17.Qe6 Kh8 18.Qd5+–) 17...Ra8 (17...Rf7 18.Bc1+–) 18.Qc2 (18.Bc1 Qc8+–) 18...Nc7 19.h4 (19.e4 de4 20.Qe4 Rb8+–) 19...Qe8 (better 19...f5+–) 20.g4?? (20.e4 Qg6+–) 20...Qg6?? (better 20...Ng4 21.Rfc1 Qh5=) 21.g5?? (better 21.Qg6 hg6 22.h5+–) 21...Qc2–+ 22.gh6 gh6 (better 22...Qg6 23.Kh2 Qh6 24.Ne2–+) 23.Nd5 (23.Kh2–+) 23...Nd5 24.a4 (24.Rfc1 Qg6 25.Kf1 Qd3 26.Kg1 Kh8–+) 24...Rf7 (24...Kh8 25.Rfc1 Rg8 26.Ng5 Qa4 27.Kg2–+) 25.Rfc1 Qb3 (better 25...Rg7 26.Ng5 Qa4 27.Ra1–+) 26.Ba1 (26.Kh1 Qd3 27.Rg1 Kf8–+) 26...Qa4 (better 26...Qd3 27.Nh2–+) 27.Rb7 (27.Kh2 Rg7–+) 27...Qe8 (better 27...Rg7 28.Kh1 Qc6 29.Rb3–+) 28.Rcb1 Rg7 29.Kf1 Bf8 (better 29...Qc6 30.R7b3 Qa6 31.Ke1–+) 30.e4 (30.Rg7 Bg7 31.Ne1 Qg6–+) 30...Rb7 31.Rb7 Nf4 32.d5 ed5 33.Bf6 Qg6 (better 33...Qe4 34.Be5 Qf3 35.Rg7 Bg7 36.Bf4 Re8 37.Be3 Re3 38.Kg1 Re1 39.Kh2 Be5) 34.Bb2 Qg2 35.Ke1 Nd3 (35...Qf3 36.Rg7 Bg7 37.Kd2 Qd3 38.Ke1 Qe2) 36.Kd2 Nb2 (36...Nc5 37.Bd4 Nb7 38.Ke3–+) 37.Ne5 Qf3! 38.Nf3 Nc4 (38...de4 39.Rb2 ef3 40.Rc2–+) 39.Kc3 (39.Kd3 Bc5 40.ed5 Nb6–+) 39...Na5 (better 39...Bc5 40.ed5 Nb6–+) 40.Ne5?? (40.Rc7 de4 41.Nd2 Bg7 42.Kb4 Rb8 43.Ka4–+) 40...Nb7 41.Nc6 (41.c6 Nd6 42.ed5 Bg7–+) 41...Nd6! 42.Ne7 (42.cd6 Bd6 Combination) 42...Be7 43.c6 (43.cd6 Bh4 44.ed5 Bf2 45.Kd3–+) 43...Ne4 44.Kd4 Nc5 (better 44...a5 45.Kd5 a4 46.c7–+) 45.Kd5 Nd7! 46.Kc4 (46.cd7 Bh4 Combination) 46...Rd8 (46...Rc8 47.Kb5 Nb8 48.Kc4–+) 47.Kd3 Nc5 (47...Ne5 48.Ke4 Nc6 49.f4 Rd4 50.Kf3–+) 48.Ke2 Nb3 (48...Bh4 49.c7 Re8 50.Kf3–+) 49.Kf3 Nc5 50.Kg2?? (50.Ke2 Bh4 51.f3–+) 50...Na6 (50...Bh4!? 51.f4–+) 51.f4 1–0. Agiant (1640) – Luiscaballero26 (1640), lichess.org, 2021.

5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Ne7 9.Nf3 Ng6 10.Be2 Bf3 (10...Bd6 11.d4+=) 11.Bf3 d6 12.0–0 Be7 13.Nc3 0–0 14.Bb2 Ne5 15.Be2 d5 (better 15...Ng6+–) 16.f4?? (16.cd5!? ed5 17.Qb3 Bd6+–) 16...Nf7?? (16...Nc4!? 17.Bc1 Nd6=+) 17.Bf3 (better 17.cd5!? ed5 18.Qb3+–) 17...dc4= 18.Qa4?? (18.Be2 Nd6 19.Qa4 Rf7=) 18...Nd6?? (better 18...Qd2 19.Nd1 Qb4 20.Qb4 Bb4–+) 19.Ra1 Nd7 (19...Qd7 20.Ba3=) 20.Ne4 (20.Ba3!?+=) 20...Ne4= 21.Be4 Nc5 22.Qc2 (22.Qc4!? Qd2 23.Bd4=) 22...Ne4=+ 23.Qe4 Qd5 24.Qc2? (24.Qd5 ed5 25.Kf2 Re8–/+) 24...Bc5 (24...Qb5 25.Ra7 Qd5 26.Rc7–+) 25.Rc1 (25.Ra4 Rd8 26.Rc4 Qd2 27.Qd2 Rd2–+) 25...Rd8 26.Qc4 Qd2 Do you see the mate threat? 27.Qe6?? (better 27.Bd4 Bd4 28.ed4 Qe3 29.Kh1 Rd4 30.Qc7 Qf4 31.Qc6–+) 27...Kf8–+ 28.Qb3 (28.Ba3 Ba3 29.Rf1–+) 28...Be3 (better 28...Rd3 29.Qd3 Qd3–+) 29.Kh1 Qd3 (29...Bf4 30.Ba3 Bd6 31.Bd6 cd6–+) 30.Qd3? (better 30.Ba3 Bc5 31.Bc5 bc5 32.Qd3 Rd3 33.Kg1–/+) 30...Rd3–+ 31.g3?? (31.Rf1–+) 31...Bc1 32.Bc1 Rd1 33.Kg2 Rc1 34.h4 Rb1 35.Kh3 Rb5 36.Kg4 Kf7 37.h5 g6 38.Kh4 gh5 39.g4 hg4 40.Kg4 Kg7 41.Kf3 f5 42.Ke3 Rb4 43.Kf3 Rf4! 44.Kf4 b5 (better 44...Kf6 45.Ke3–+) 45.Kf5 b4 46.Ke4 h5 47.Kd3 h4 48.Kc4 h3 (better 48...c5–+) 49.Kb4 h2 50.Kc5 h1Q 51.Kb5 Qc1 52.Kb4 c5 53.Kb5 c4 54.Kc6 (54.Kb6 Qe3 55.Kc7 c3 56.Kb7 c2 57.Ka6 Qa3 58.Kb7 Qb3 59.Kc6 c1Q 60.Kd6 Qd3 61.Ke5 Qce3) 54...c3 55.Kd5 (55.Kb5 Qg5 56.Kb6 c2 57.Kc6 c1Q 58.Kb6 Qc8 59.Ka7 Qe3) 55...c2 (55...Qe3 56.Kc4 c2 57.Kb5 Qb3 58.Kc5 c1Q 59.Kd6 Qd3 60.Ke5 Qce3) 56.Ke4 (56.Kc5 Qe3 57.Kd5 c1Q 58.Kd6 Qcc5 59.Kd7 Qee7) 56...Qd1 (56...Qg5 57.Kd3 c1Q 58.Kd4 Qge3 59.Kd5 Qcc5) 57.Ke5 (57.Kf4 c1Q 58.Kf5 Qc4 59.Ke5 Qdd5) 57...c1Q 58.Ke4 (58.Kf5 Qc4 59.Ke5 Qdd5) 58...Qdd2 (58...Qc4 59.Ke5 Qdd5) 59.Kf3 (59.Kf5 Qg5 60.Ke4 Qce3) 59...Qcc3 (59...Qf4 60.Ke2 Qfe3) 60.Ke4 (60.Kg4 Kf6 61.Kh5 Qg5) 60…Kg6 (60...Qde3 61.Kd5 Qcc5) ½–½. RichardSommer (2110) – Francutio (1850), lichess.org, 2020.

5.b5 c5 6.Nf3 a5 (6...a6 7.Nc3=) 7.a4 d5 8.cd5 Qd5 9.Nc3 Qd8 (9...Qf5 10.Be2+=) 10.Be2 Be7 11.Qc2 Nh6 12.0–0 0–0 13.d4 Nd7 (13...Qc8 14.Rad1+–) 14.Qb3 Kh8 15.Qe6 cd4 16.ed4 Bb4 17.Qh3 Re8 18.Bd3 Bc3 (18...Nc5!? 19.dc5 Qd3+–) 19.Bc3+– Bf3 (19...Be4 20.Be4 Re4 21.Rae1 Re1 22.Re1+–) 20.Qf3 (20.gf3?! Rc8 21.Rac1 Ne5+–) 20...Nf8 21.Bd2 (21.Rfe1 Re1 22.Re1 Rc8+–) 21...Qd4 22.Bh6 gh6 23.Rfd1 Nd7?? (23...Rad8+–) 24.Bg6! Ne5?? (24...hg6 25.Qd3 Double attack (25.Rd4 Discovered attack; 25.Qd3 Decoy)) 25.Qf6 (25.Rd4?! Nf3 26.gf3 Rg8+–) 25...Kg8 26.Bf7! Kf8 (26...Nf7 27.Qd4 Pinning (27.Qd4 Deflection; 27.Rd4 Zwischenzug)) 27.Be8 (27.Bd5 Nf7 28.Qf7) 27...Nf7 (27...Kg8 28.Qe6 Kg7 29.Qe7 Kg8 30.Rd4 Ra7 31.Qe6 Rf7 32.Bf7 Nf7 33.Rd7 Kh8 34.Qf7 h5 35.Qh7) 28.Qf7 1–0. GuestNNSN – GuestAETA, freechess.org, 2017.

5.d4 Bb4!? 6.Bc3 Nc6+=.

4.c4 Nf6

5.a3 a6 6.Nf3 (6.Nc3 Nc6 7.Nf3 Bd6 8.Bd3 0–0 9.0–0 h6 10.Ne4) 6...Nc6 7.Nc3 Bd6 8.Bd3 0–0 9.0–0 h6 10.Ne4.

5.a3 d5 6.d4 c5 7.bc5 bc5 8.Nf3 Ne4 9.Qb3 Qb6 10.Nbd2 Nd2 11.Nd2 Qb3 12.Nb3 cd4 13.Bd4 Nc6 14.cd5 Nd4 15.Nd4 Bd5 16.Bb5 Kd8 17.0–0 Bc5 18.Rfd1 Ke7 19.a4 Kf6 20.Rac1 Rac8? (better is 20...Bb6!?=) 21.Ba6+/– Rc7? (better is 21...Bd4!? 22.Rc8 Rc8 23.Bc8 Be5+/–) 22.Nb5+– Rc6 23.Bb7 Rcc8 24.Bc8 (24.Bd5?! ed5 25.Rd5 Rhd8 26.Rd8 Rd8+/–; 24.Rd5?! ed5 25.Bc8 Rc8+–) 24...Rc8 25.Na7! Ra8 (25...Ba7 26.Rc8 Pinning (26.Rc8 Deflection)) 26.Rc5 Ra7 27.a5 Ke7 28.Ra1 Kd6 29.Rb5 Bc6 30.Rb6 White intends a6 30...Rc7 (30...Kd7 31.Rd1 Bd5 32.e4 Ra5 33.ed5 ed5 34.Rb7 Ke6 35.Re1 Kf6 36.Kf1+–) 31.Rd1 (31.a6 Ke7+–) 31...Kc5 (31...Ke7 32.Rc1 Kd7 33.a6+–) 32.Rc1 Kd5 33.a6 g5 34.a7! Ra7 35.Rbc6 Ra2 (35...Ke5 36.Rc7 Rc7 37.Rc7+–) 36.Rc7 f5 37.Rh7 g4 38.g3 Ke4 39.Kg2 e5 Black prepares the advance f4 (39...Rd2 40.Rc6 Ke5 41.Rb7+–) 40.Rd7 f4 41.Rc4 Kf5 42.gf4 g3 43.Kg3 ef4 44.Rf4 (44.Rf4 Ke6 45.Rfd4+–) 1–0. Seslavin,Maxim (1960) – Patrin,Yury (1795), Novokuznetsk RUS, Summer Open, 2013.

5.a3 d5 6.cd5 ed5 7.Nf3 (7.Bf6 Qf6 8.Nc3 d4 9.ed4 a5+=) 7...Nbd7= 8.Be2 (8.Bf6 Nf6 9.Qc1 Qc8=) 8...c5 9.b5 (9.Bb5 a6 10.Bf6 Qf6 11.Bd7 Kd7=) 9...Bd6 10.d4 c4 Black has a new protected passed pawn: c4 11.Nc3 Qe7 12.0–0 (12.Nd2 h6+=) 12...Ne4 13.Ne4 Qe4 (13...de4 Instead of 14.Nd2+/–) 14.Nd2 Qh4 (14...Qg6 15.Bf3 Rc8 16.Bc3=) 15.h3 (15.g3 Qe7=) 15...Nf6 (15...0–0 16.Bg4 f5 17.Be2+=) 16.Nf3 White threatens to win material: Nf3xh4 (16.Bf3 Rb8=) 16...Qe4 17.Ne5 0–0 (better is 17...Qf5= and Black can hope to survive) 18.Bf3+/– Qh4 19.Nc4! Deflection: d5. 19...Bc7 (19...dc4 20.Bb7 Deflection Pinning) 20.Ne5 Ne4 21.Be4 de4 (21...Qe4 22.Nf3+/–) 22.Qg4 (22.Nc6 Bc8 23.Qc2 Kh8+/–) 22...Qh6 (better is 22...Qg4 23.hg4 Bc8+=) 23.Qd7+– Qd6 24.Qd6 Bd6 25.Nc6 a6 26.a4 Rfc8 27.Rfc1 f6 (27...Rc7 28.h4+/–) 28.d5 Kf8 29.Bd4 ab5 30.ab5 Bc7?? leading to a quick end (30...Bc6 31.Ra8 Ra8 32.Rc6 Bc5 33.Bc5 bc5 34.Rc5 Rb8+–) 31.Na7 Bd5 (31...Bh2 a fruitless try to alter the course of the game 32.Kh2 Rc1 33.Rc1 Ra7 34.Rc7+–) 32.Bb6! Deflection: c7 (32.Bb6 Be5 33.Rc8 Rc8 34.Rd1+/–) 1–0. Roerig,Gerhard (1785) – Hetzner,Andreas (1915), Pyramiden Franken Cup 5th, 2002.

5.a3 d5 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.c4).

5.a3 Bd6 6.Nf3 (6.Nc3 0–0 7.Nb5 Be7 8.Nf3 a6 9.Nc3 Nc6 10.Bd3) 6...Nc6 7.Nc3 0–0 8.Nb5 Be7 9.Bd3 a6 10.Nc3.

5.a3 g6 6.Nf3 Bg7 7.g3 0–0 8.Bg2 Qe7 9.0–0 c5 10.Qb3 d6 11.d4 Nbd7 12.Nbd2 Rfb8 13.b5 Rd8 14.a4 Rab8 15.Nh4 (15.Rfd1 d5=) 15...d5 16.Qa3 Bf8 17.Nhf3 Qe8 18.Qc3 Bg7 19.Ne5 (19.Rfd1!?=) 19...Ne5 20.de5 d4 21.ed4 cd4 22.Qd3 Ng4?? (better is 22...Bg2 23.Kg2 Ng4–/+) 23.Bb7+/– Ne5 24.Qe4 Qe7 25.Bc6 Qb4 26.Bc1 Nc4 (26...Rbc8!?+/–) 27.Nc4+– Qc4 28.Bf4 f5 (28...Rbc8+–) 29.Qe1 Rbc8 30.Rc1 Qb3 31.Bg5 Rf8 32.Rb1 Qc4 33.Bd7 Rce8 34.Be8 Re8 35.Qc1 Qd5 36.Qc6 Qc6 37.bc6 Rc8 38.Rbc1 Rc7 (38...e5 39.Rfd1+–) 39.Bd8 Rc8 40.c7 Be5 (40...e5+–) 41.Rfe1 Bd6 42.Re6 Bb4 43.Rc4 (43.Re8!? Bf8 44.Rc6 Kf7+–) 43...Bc5 44.Kf1 Kf7 45.Rc6 a6 (45...Ke8 46.Ke2+–) 46.f4 (46.a5 d3 47.ab6 Bb6 48.Rb6 d2+–) 46...Ra8 (46...a5+–) 47.c8Q (47.a5 d3 48.ab6 Bb6 49.Rb6 Rc8+–) 47...Rc8 48.Rc8 Ke6 (48...a5 49.Rc6 d3 50.Bb6+–) 49.R8c5 (49.a5 Kd7 50.Ra8 d3 51.ab6 Bb6 52.Bb6 Ke7 53.Rc7 Ke6 54.Re8 Kd5 55.Rd8 Ke6 56.Bc5 d2 57.Rd6#) 49...bc5 50.Rc5 Kd6 51.Ra5 Kc6 52.Ra6 Kd5 53.Be7 Kc4 54.Ke2 Kc3 55.Kd1 (55.Rc6 Kb3 56.a5 Ka4 57.a6 Kb5 58.Rd6 d3 59.Kd3 h5 60.a7 h4 61.Rd5 Kb6 62.a8Q hg3 63.Bd8#) 55...d3 56.Rc6 Kb3 57.a5 Ka4 58.a6 Kb5 59.Rd6 Ka5 60.a7 (60.a7 Ka4 61.Rb6 Ka5 62.Rb8 h6 63.a8Q#) 1–0. Woloszyn,Piotr (1725) – Tomczyk,Ryszard, LXIII Otwarte Mistrzostwa Warszawy Poland, 2010.

5.Qb3 Nc6!?–/+.

5.Qb3 Be7 6.Nf3 (6.b5 0–0=) 6...0–0 (6...Nc6 7.b5 Na5 8.Qc2+=) 7.Nc3 Na6 (7...Nc6 8.b5 Na5 9.Qc2+=) 8.a3 c5 9.b5 Nc7 10.Bd3 d5 11.Ne2 (11.0–0 Qd6=) 11...Ne4 (11...a6 12.a4+=) 12.Rd1 (12.Nf4 a6 13.cd5 ed5 14.ba6 c4–/+) 12...Bf6 (12...a6 13.ba6 Ba6 14.0–0+=) 13.Ne5= Qd6 (13...Be5 14.Be5 Nd6 15.Nc3+=) 14.Be4 (14.f4 dc4 15.Bc4 h6+=) 14...Be5 (14...de4 15.d4 cd4 16.ed4=) 15.Be5 (15.d4 cd4 (worse is 15...de4 16.de5 Qe7 17.0–0+=) 16.Nd4 Rfc8+= (16...de4 17.Nc6 Qc5 18.Be5 Nb5 19.cb5 Bc6 20.Bd6=)) 15...Qe5–/+ 16.Bf3 (16.Bd3 dc4 17.Qc4 Bg2–/+) 16...dc4 17.Qc4 Bf3 18.gf3 Qd5 (18...a6 19.ba6 Ra6 20.a4–/+) 19.Qd5+= ed5 (19...Nd5 20.d4+=) 20.a4 (20.d4 c4+=) 20...a6+= 21.d4 ab5 22.dc5 (22.ab5 c4 23.Nc3 Ra3+=) 22...bc5 23.ab5 Rfb8 (23...Rab8 24.Nc3+=) 24.Nc3 Nb5 25.Nd5 c4 (25...Ra2 26.0–0=) 26.Rc1 (26.Rg1 g6+=) 26...c3 (26...Nd6!?+=) 27.0–0= (27.Nc3? Nc3 28.Kd2 Na2–+) 27...Ra3 (better is 27...g6=) 28.Rc2 (28.Rb1 Raa8 29.Rfc1 g6+=) 28...Rd8 (28...Rb3 29.Rcc1+=) 29.Rd1= Kf8 30.Nc3?? (better is 30.Kf1=) 30...Rd1–+ 31.Nd1 Ra1 0–1. Althoff,Guntram (2140) – Warnk,Torsten (2000), Hessen–ch VM, 2004.

5.d3 Be7 (better 5...Bb4!? 6.Nd2 0–0–/+) 6.a3 0–0 7.Nf3 d5 8.Nbd2 Nbd7 9.Be2 c5 10.b5 Re8 11.0–0 Nf8 (11...Bd6 12.cd5 ed5 13.Qc2=) 12.Re1 Bd6 13.a4 e5 14.d4 (14.cd5 Nd5 15.Nc4 Ng6+=) 14...cd4 15.ed4 ed4 (15...e4 16.Ne5=) 16.Bd4 (16.Nd4 Qc7 17.h3 Ne4 18.cd5 Bb4 19.Ne4 Be1+=) 16...Ne6 17.Bf6 Qf6 18.Bd3 (18.cd5 Nf4 19.Bc4 Nd5=+) 18...dc4 (18...Nd4 19.cd5 Bd5 20.Be4 Be4 21.Ne4 Nf3 22.Qf3=+) 19.Bc4 (19.Be4 c3 20.Bb7 cd2 21.Qd2 Rad8=+) 19...Bb4 (19...Ng5 20.Ng5 Qg5–/+) 20.Re2? (20.Qb3 Bd2 21.Nd2 Rad8=+) 20...Qg6 (better 20...Nf4!? 21.Re8 Re8–+) 21.Nh4 (21.Qb1 Nf4 22.Re8 Re8 23.Qg6 hg6=) 21...Qg4–/+ 22.Rb1?? (22.Be6 Qh4 23.Bh3 Bc3–/+) 22...Qh4?? (better 22...Bd2 23.Be6 fe6 24.Qd2 Qh4 25.Rb4–+) 23.g3?? (better 23.Rb4 Nf4 24.Re8 Re8 25.g3 Nh3 26.Kf1–+) 23...Qh3–+ 24.Be6 (24.Qf1 Nf4! 25.Qh3 Nh3 26.Kf1 Re2 27.Ke2 Re8 28.Kd1–+) 24…Qg2 0–1. SieStein – KingVittorio (1845), lichess.org, 2019.

5.Be2?? Bg2–+ (5...Bb4?! 6.Nf3–/+) 6.Bf3 Bh1 7.Ba8? (7.Bh1 c6 8.Qa4–+) 7...Ba8 8.a3 Ne4 (8...Bd6 9.f4–+) 9.Qg4 h5 10.Qe2 Qg5 11.Nf3 (11.Qf1 Nd6 12.d3 Bg2–+) 11...Qg2 12.Nc3 (12.d3 Qh1 13.Qf1 Qf3 14.de4 Qe4 15.Nc3–+) 12...Nc3 13.Bc3 (13.Nh4 Qh2 14.Bc3 Qh4–+) 13...Qh1 (better is 13...Bf3 14.Qf1 Qh2 15.d3–+) 14.Qf1 0–1. nordlicht (1955) – michas2007, gameknot.com, 2013.

5.Nf3 Bb4–/+ 6.Qa4 Nc6 7.Ba3 Ba3 8.Qa3 d5 (8...Na5 9.Ne5–/+) 9.Nc3 (9.d4 a6–/+) 9...Qd7 (9...d4 10.ed4 Nd4 11.Nd4 Qd4 12.f3–+) 10.Bd3 (10.d4 dc4 11.Bc4 Qd6–/+) 10...dc4 11.Bc4 0–0–0 (11...Ne7 12.Ne5 Qd6 13.Qa4 Kf8 14.d4–/+) 12.0–0 (12.d4 Qd6 13.Qc1 e5+=) 12...h5 (better is 12...Na5 13.Bb5 Qd6 14.Qd6 Rd6–/+) 13.Ne5?? (better is 13.d4+=) 13...Ne5–+ 14.d4 (14.Ba6 Qd6 15.Qd6 cd6 16.Be2–+) 14…Nc4 (14...Nc4 15.Qa7 Qc6–+) 0–1. saetta – Lutist, ICS, 1999.

5.h3 Bb4 6.a3 Be7 7.Nf3–/+.

5.a3 c5

6.b5 a5 7.a4 d5 8.d3 Nbd7 9.Nf3 Bd6 10.Be2 0–0 11.Nbd2 Re8 12.0–0 Bf8 13.Qb3 e5 14.cd5 Bd5 15.Nc4 e4 16.de4 Ne4 17.Rad1 Ndf6 18.Qc2 Qc7 (better is 18...Bd6!?+/–) 19.Be5+– Qb7 20.Nd6?? (better is 20.Rd5 Qd5 21.Nb6+–) 20...Nd6 (20...Bd6 21.Bd6 Nd6 22.Rc1–+) 21.Bd6 (21.Bf6 gf6 22.Qd3 Be4–+) 21...Bd6 22.h3 Be5 23.Ne5 (23.Rd2 Ne4 24.Rd3 c4 25.Rd5 Qd5 26.Bc4 Qc5–+) 23...Re5 24.Bf3 (24.Bd3–+) 24...Bf3 25.gf3 (25.Rd6 Rg5 26.g3–+) 25...Qf3 26.Kh2 Rh5 27.Rfe1 (27.Qg6 Rh3 28.Kg1 Rh1) 27...Rh3 28.Kg1 Rh1 0–1. Fournier,Frederic – rokosian (2175), Active, 2003.

6.b5 a6 7.Nc3 Be7 8.Nf3 0–0 9.Qc2 (9.d4 d5+=) 9...d5 10.d4 (10.cd5 ed5 11.Bd3 d4+=) 10...dc4 (10...cd4 11.Nd4 dc4 12.Bc4 Bg2 13.Rg1+=) 11.Bc4 (11.dc5 Bc5 12.Bc4 Qe7=) 11...cd4 12.Nd4 Bg2 13.Rg1 Bb7 14.Rd1 (14.Be6 Bc5 (14...fe6 15.Ne6 Nh5 16.Nd8 Bd8 17.Ne4+–) 15.Bf5 Bd4=) 14...Qc7–/+ 15.Rg3?? (better is 15.Bd5!–/+) 15...Qc4–+ 16.f3 Rc8 17.Qg2 g6 (better is 17...Nh5 18.Rg4 Ba3 19.Nde2–+) 18.Ne4 (18.Rc1 Nbd7 19.Nd1 Qd3–+) 18...Ne4 19.fe4 ab5 (19...Bh4 20.Qf2 Bg3 21.hg3–+) 20.Rc1 Qa4 (20...Qd3 21.Rc8 Bc8 22.Qc2 Qc2 23.Nc2–+) 21.Rc8 Bc8 22.Nc2 (22.Qe2 b4 23.ab4 Qb4 24.Kd1 Ra2–+) 22...Bb7 23.Bd4 (23.Rg4 Qb3 24.Nd4 Qe3 25.Qe2 Qe2 26.Ne2 Nd7–+) 23...Nd7 (better is 23...e5 24.Be5 Bh4 25.Bb8 Be4 26.Qf2–+) 24.Rg6 (24.Qh3 Qa5 25.Kf1–+) 24...fg6 25.h3 e5 26.Qg4 Qc2 27.Qe6 Kf8 28.Be5 Bh4 29.Kf1 (29.Bg3 Bg3 30.Kf1 Qf2) 29...Qf2 0–1. Karlsen,Jan M – Knutsen,Pol Egil, Norway, 2001.

6.b5 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 b6 6.c4 Bb7).

6.bc5 bc5 7.Nc3 Nc6 8.Nf3 Be7 9.Be2 0–0 10.0–0 d5 11.cd5 ed5 12.Qc2 (12.Rb1 Rb8 (12...d4 13.Na4 Qd6 14.ed4 cd4 15.Bd4 Nd4+=) 13.Qc2 Re8 14.Na4 Nd7 15.Bd3 g6=) 12...Rc8 (12...Rb8 13.Rab1 Re8 14.Na4 Nd7 15.Bd3 g6+=) 13.Rab1 d4 14.Ne4 Ne4 15.Qe4 Ba8 (15...Rb8+=) 16.Bd3 (worse is 16.ed4 Nd4 17.Qe3 Bf3 18.Bf3 Bg5+=) 16...g6 17.Qf4 (worse is 17.ed4 Nd4 18.Qe3 Bf3 19.gf3 Bd6–/+) 17...de3 18.Qe3 Nd4 19.Nd4 (worse is 19.Bd4 cd4 20.Qf4 Bd6–/+) 19...cd4 20.Qg3 (20.Qd4? Qd4 21.Bd4 Rcd8–+) 20...Bf6 21.Rfe1 Rb8 22.Bf1 Re8 23.Re8 Qe8 24.Re1 Qd8 25.Ba1 Bd5 26.Qf4 Be6 27.h4 Rb6 28.Re4 Rd6 29.g4 Bg7 30.g5 Rd5 31.Re1 Ra5 32.Qg3 d3 33.Bg7 Kg7 34.Bd3 Ra3 35.Re6 fe6 (35...Rd3?? 36.Qe5 Kg8 37.Re8 Qe8 38.Qe8 Kg7 39.Qe2+–; 35...Qd3?? 36.Qe5 f6 37.Qf6 Kg8 38.Re8) 36.Qe5 Kf7 37.Bc4 Qe7 (37...Qd2?? 38.Qe6 Kg7 39.Qf6) 38.Qh8 Rh3 (38...h5 39.gh6 Qf6 40.Qh7 Kf8 41.Qb7=) 39.Qh7+= Kf8 40.Qg6 Rh4 41.Be6 Qg7 42.Qf5 Ke7 43.Kg2 Qd4 44.Kf3 Qd2 45.Qf6 Ke8 46.Kg3 Qd4 47.Qf7 ½–½. michaelbuss (2615) – Benjap (2625), ChessWorld.net, 2003.

6.bc5= bc5 7.Nf3 d6 8.Nc3 Nbd7 9.Be2 Be7 10.0–0 Rb8 11.Qc2 0–0 12.Rab1 a6 13.h3 (13.d4 Qc7=) 13...Qc7 14.d3 Bc6 15.Nd2 Rb7 16.Bf3 d5 17.cd5 ed5 18.Na4 Qd6 (18...Rfb8 19.Bf6 Ba4 20.Qa4 Nf6 21.Rb7 Rb7 22.Rd1=) 19.Bf6 (19.d4 c4=) 19...Rb1 20.Rb1 Bf6 21.Nc5 Qc5 22.Qc5 Nc5 23.Rc1 Be7 24.d4 Rb8 25.dc5 Rb5 26.Be2 ½–½. Woelfelschneider,Peter – Wittal, 2009.

6.bc5 bc5 7.Nf3 Be7 8.Be2 0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.Be2 0–0 7.c4 c5 8.bc5 bc5).

6.bc5= Bc5 7.d4 Bd6 8.Nc3=.

6.bc5 Bc5 7.d4 Be7 8.d5 d6 9.Nf3 Nbd7 10.de6 (10.Nc3 0–0+=) 10...fe6+= 11.Ng5 (11.Nd4 Nc5+=) 11...Nc5 12.Bd4 Qc8 13.Bc5 bc5 14.Qc2 0–0 15.Bd3 h6 16.Nf3 Bf3 17.gf3 Rb8 18.Nd2 Nd7 19.Rg1 Bf6 20.Ra2 Ne5 (20...Qe8 21.Bg6 Qe7 22.f4+=) 21.Bh7 Kh8 22.Be4 g5 (22...Nc6 23.f4+=) 23.h4= gh4 24.f4 Nf7 25.Rg6 Qd8 26.Qd1 (26.f5 Ne5 27.Rg1 d5+=) 26...d5+= 27.cd5 (27.Bd3 Qe7+=) 27...ed5 28.Bf5 Qe7 29.Qh5 (29.Rc2 a6+=) 29...Rb6 30.Rc2 c4 31.Ke2 h3 (31...Rc6 32.e4+=) 32.Rc1 (32.Rg3 Bg7= (32...Qa3 33.Rh3 Bg7 34.Kd1–/+)) 32...h2–/+ 33.Rh1 (33.Qh2 Qa3 34.Rh6 Kg8 35.Rh8 Nh8 36.Qh7) 33...Rfb8 (33...c3 34.Rh2 cd2 35.Rh6 Nh6 36.Qh6 Kg8 37.Rg2 Qg7 38.Be6 Rf7 39.Qf6 Qg2 40.Qf7 Kh8 41.Qf8 Kh7 42.Bf5 Rg6 43.Qf7 Kh6 44.Qg6 Qg6 45.Bg6 Kg6 46.Kd2 Kf6+–) 34.Rh2= Bg7 35.Rhg2 Bb2 (35...Bc3 36.Kd1+=) 36.Bc2 Qd7 (36...Ba3 37.Rg7 (37.Qd5?! Rg6 38.Bg6 Nd6+/–) 37...Ng5 38.Re7 Be7 39.fg5+–) 37.Nf3 d4 (better is 37...a5!?+=) 38.ed4+– (38.Nd4?! Bd4 39.ed4 Qe7 40.Kd2 Re8=) 38...Bd4? (38...Rf8 39.Rg7 Re6 40.Kd1 Ne5 41.Rd7 Nd7+–) 39.Nd4?? (39.Rb6 Re8 40.Kf1 Bb6 41.Qg6+–) 39...Qe8?? (better is 39...Qd4 40.R2g3 Qf4+=) 40.Kf3 (40.Kf3 Qe7 41.a4 Qa3 42.Kg4 Rg6 43.Bg6+– (43.Qg6? Rg8–+)) 1–0. ghost (2655) – Good_Boy (2635), ICC, 2003.

6.bc5= Bc5 7.d4 Be7 8.Nf3 0–0 9.Nbd2 d5 (9...Nc6 10.Bd3=) 10.Be2 (10.Bd3 dc4 11.Bc4 Nc6=) 10...Nbd7 (10...Nc6 11.0–0=) 11.0–0 Rc8 12.Qb3 (12.Rc1 h6=) 12...dc4 (12...Ne4 13.Ne4 de4 14.Nd2=) 13.Bc4 Ne4 (13...h6 14.Rac1+=) 14.Ne4+= Be4 15.Nd2 (15.Rac1 h6+=) 15...Bb7 16.Rfd1 (16.Rac1 Nf6=) 16...Bh4 (16...Nf6 17.Rac1=) 17.g3 (17.a4 h6+=) 17...Bf6 (17...Be7 18.Rac1+=) 18.Bf1 (18.Rac1 h6+=) 18...e5 (18...Bd5 19.Qb5=) 19.Bg2 Bg2 20.Kg2 ed4 21.Ne4 (better is 21.ed4 Re8 22.Nc4=) 21...Nc5–/+ 22.Nf6 Qf6 23.Qa2 (better is 23.Qd5!? Rcd8 24.Qf3 Qf3 25.Kf3 de3 26.Rd8 Rd8 27.Ke3–/+) 23...Qc6–+ 24.Kg1 de3 25.fe3 (25.Bd4 ef2 26.Qf2 Ne6–+) 25...Qe4 26.Bd4 (26.Qd5 Qe3 27.Kf1 Ne4–+) 26...Ne6 (26...Nb3 27.Qb3 Rc2 28.Qc2 Qc2 29.Rdc1–+) 27.Rd2 (27.Qg2 Qg2 28.Kg2 Rc2 29.Kg1 Ng5–+) 27...Nd4 (better is 27...Ng5!? 28.Rg2–+) 28.ed4 Qe3 (28...Rc3 29.d5–+) 29.Kf1 Rfd8 (29...Rfe8 30.Rf2 Rc7 31.Qd2–+) 30.Qb2 (30.Re1 Qf3 31.Kg1 Re8–/+) 30...Rc6 (30...Rd5 31.Re2 Qd3 32.Kg1–+) 31.Rad1 (31.Re2 Qd3 (31...Qd4?? 32.Qd4 Rcc8 33.Qa4+–) 32.Qd2 Qc4–/+ (32...Rd4 33.Qd3 g5 34.Qd4 h5 35.Re8 Kh7 36.Rh8 Kg6 37.Rg8 Kf5 38.Qd5 Kf6 39.Re1 Rc5 40.Qd8 Kf5 41.Qg5; 32...Qd4?? 33.Qd4 Rcc8 34.Qa4+–)) 31...Qc3 (31...Rf6 32.Kg2–+) 32.Qa2 (32.Kg2 Qc4–/+) 32...Qc4 (better is 32...Rf6!? 33.Kg1 Qe3 34.Kh1 Qf3 35.Kg1 h5–+) 33.Qc4–/+ Rc4 34.Kf2 (34.d5 f5–/+) 34...Rcc8 (34...Rd5 35.Re1 Kf8 36.Ke3–/+) 35.Ke3 (35.d5 f6+=) 35...Rc3 (35...Re8 36.Kd3–/+) 36.Rd3 Rd3 (36...Rc2 37.h3–/+) 37.Kd3 Kf8 38.Re1 Re8 (38...f6 39.Re6+=) 39.Rc1 a5 (39...g6 40.d5=) 40.Rb1 (40.a4 Re6=) 40...Re6+= 41.a4 (41.d5 Rh6+=) 41...f5 (41...Ke7 42.d5 Rg6 43.Ke3+=) 42.Rc1 (42.d5 Rd6 43.Kd4 Ke7=) 42...Kf7 (42...Rh6 43.Rc8 Ke7 44.Rc7 Kd6 45.Rb7=) 43.Rc7= Re7 (43...Kf6 44.Kc4=) 44.Rc6 Re6 45.Rc7 ½–½. Bartle,Georg (1720) – Soavi,Carlo Maria, Baden–ch AT1, 2007.

6.bc5 Bc5 7.d4 Be7 8.Nf3 0–0 9.Bd3 Nc6 10.0–0 Rc8 11.Nbd2 d5 ½–½. aspasio (2875) – gkthomas (2830), net–chess.com, 2014.

5.a3 Nc6

6.Bd3 Nb4 7.Bf1 Nd3 8.Bd3 Bg2 9.Nf3 Bh1 10.Nc3.

6.Bd3?? Nb4 7.Bf1 Nd3 8.Ke2 –+.

6.Bd3?? Be7 7.Nc3?? (better is 7.Nf3=) 7...Ne5 (better is 7...Nb4 8.ab4 Bg2–+) 8.Bc2?? (8.Bf1 Nd3! 9.Bd3 Bg2–+) 8...0–0 (better is 8...Bg2 9.f4 Ng6–+) 9.Ne4 (better is 9.Nf3 Bf3 10.gf3 Nc4 11.Bc1–+) 9...Ne4 (9...Nc4 10.Bf6 Bf6 11.d4–+) 10.Be4 (10.Be5!? Bf6 11.Bf6 Qf6 12.Nf3+=) 10...Be4–/+ 11.Be5 Bg2 12.Qg4 The mate threat is Qxg7 12...f6 13.Bf6?? (13.Qg2 fe5 14.d3–/+) 13...Rf6 (better is 13...Bf6 14.Qg2 Ba1–+) 14.Qg2+= Qf8 Exerts pressure on the backward pawn (14...a5 15.b5+=) 15.Nh3 (15.f4 a5 16.b5 Re8+=) 15...Re8 (better is 15...c6+=) 16.0–0?? (better is 16.f4+=) 16...Rg6–+ 17.Ng5 (17.Qg6 hg6 18.Nf4–+) 17...Rg5 18.Qg5 Bg5 19.f4 Bf6 (19...Bh4 20.Rac1–+) 20.e4 (20.Rad1–+) 20...Ba1 (20...Ba1 21.Ra1 Qf4–+) 0–1. Nautiluschess – TimeWarp, ICS blitz, 2001.

6.Nf3 a5 7.b5 Ne7 8.Be2 Ng6 9.0–0 c6 10.Nc3 Bd6 11.d4 Bb8 12.c5 0–0 13.Na4 Qc7? (better is 13...bc5!? 14.Nc5 Ra7+=) 14.cb6+– Qd6 (better is 14...Qd8!?+–) 15.Nc5 Nh4 16.Nb7?? (better is 16.g3 cb5 17.Nh4 (17.gh4?? Bf3 18.Re1 Qh2 19.Kf1 Qg2#) 17...Qb6 18.Nb7 Qb7 19.Qb3+–) 16...Nf3 17.Bf3 Qh2# 0–1. Radwan,Jan (1715) – Olejnik,Bernard (1885), Turniej Szachowy Niepelnosprawnych Poland, 2010.

6.Nf3+= Bd6 7.Nc3 a5 8.Nb5 ab4 9.Nd6 cd6 10.Qb3.

6.Nf3 Be7 7.Be2 0–0 8.0–0 d5 9.Nc3 a6 (9...d4 10.ed4 Nd4 11.Nd4 Qd4 12.Nd5 Qb2 13.Ne7 Kh8 14.Bf3 Bf3 15.Qf3 Qd2 16.Nc6=) 10.Qc2 h6 11.Rfd1 b5? (better is 11...dc4 12.Bc4 Nb8+=) 12.cb5+– ab5 13.Bb5 Qd6 14.Na4 Ng4 15.h3 Nge5 16.Rac1 (16.Ne5!? Ne5 17.Nc5+–) 16...Nf3+/– 17.gf3 Ne5 18.f4 (better is 18.Be5 Qe5 19.Qc7 Qg5 20.Qg3+/–) 18...Nf3+= 19.Kg2 (19.Kh1 Ba6 20.Bc6 Ra7+/–) 19...Nh4 (19...d4 20.e4 Qf4 21.d3 (21.Qc7 Qe4 22.Bc6 Bc6 23.Qc6 Nh4 24.Kh2 Bd6 25.Kg1 Qg6 26.Kf1 Qd3 27.Kg1 Qh3–+) 21...Qh2 22.Kf3 Qh3 23.Ke2 Qh5 24.Ke1 Qb5 25.Nc5=) 20.Kf1 d4 21.Qc7 (better is 21.Bd4!? Bg2 22.Kg1 Nf3 23.Kg2 Nd4 24.ed4 Qd5 25.Kh2 Qb5 26.Qc7=) 21...Qd5+= 22.Qe7? (better is 22.Bc6 Bc6 23.Qc6 Qc6 24.Rc6 Ra4 25.Rdc1–/+) 22...Qg2 23.Ke2 Bf3 24.Kd3 Bd1?? (24...Qg6 25.Kc4 Rfc8 26.Kb3 Bd5 (26...Bd1?! 27.Rd1 Qh5 28.Rc1 Rc1 29.Bc1 Qb5 30.Nc5–+) 27.Bc4 Bc4 28.Rc4 Rc4–/+) 25.Rd1 Rad8?? (25...Qg6!? 26.e4 Qh5–/+) 26.Bd4 (better is 26.Qh4 Qb7 27.Bc4+–) 26...Nf5+= 27.Qc5 Rd5?? (better is 27...Nd4 28.ed4 Qf3 (worse is 28...Qh3 29.Kc2+=) 29.Kc2 Rc8=) 28.Bc6+– Qf3 29.Bd5 Qd1 30.Nc3?? (better is 30.Bc6+–) 30...Qf1+= 31.Kc2 ed5 32.Qd5 Ne7?? (better is 32...Nd4 33.Qd4 Qf2+=) 33.Qe5+– Nc6 +–. reddragonx (1725) – jolaw (1610), internet, 2007.

5.a3 d6

6.d4 a5 7.ba5 Ra5 8.Nf3=.

6.d4 Nbd7 7.Nf3 c5 (7...d5 8.Nbd2=) 8.Nc3 (8.Bd3 cb4 9.ab4 a5+=) 8...cd4 (8...a5 9.bc5 bc5 10.Bd3+=) 9.Nd4 Be7 (9...a5 10.f3=) 10.Ndb5 (10.Be2 0–0 11.0–0 a6+=) 10...Ne5= 11.Qa4 (11.f4 Nc6=) 11...Bc6 (11...0–0 12.Rd1 Bc6 13.Qc2=) 12.Qa6= Qb8 (12...Qd7 13.Rd1 0–0 14.c5=) 13.Nd4 Qb7 14.Qb7 Bb7 15.Ncb5 (15.f4 Neg4 16.Nc2 Ne4+=) 15...0–0+= 16.Nb3 (16.Rc1+=) 16...Rfd8 (16...a6 17.N5d4+=) 17.f3 (17.c5 bc5 18.bc5 Ng6 19.cd6 Bd6 20.Nd6 Rd6+=) 17...Rd7 (17...a6 18.N5d4+=) 18.Be2 (18.c5 bc5 19.Be5 de5 20.Nc5 (worse is 20.bc5 Bd5–/+) 20...Bc5 21.bc5=) 18...a6+= 19.Nc3 Rc7 20.Na4 (20.Nd2 Bc6=) 20...Nc4 Black gets strong play along the open c–file 21.Rc1 Rac8 22.Rc4 Rc4 23.Nb6 (worse is 23.Bc4 Rc4 24.Nb6 Rc2 25.Bf6 Bf6–/+) 23...Rc2 24.Nc8 Bc8 (worse is 24...Rc8 25.Na5 Ba8 26.Kd2+/– (26.Ba6?! Rc2 27.Bf6 Bf6=)) 25.Bc1 (25.Bf6 Bf6 26.Kd1 Rc3–+) 25...Nd5 (25...d5 26.Kd1 Ra2 27.Nc5=) 26.Kf2 Bf6 27.Rd1 Re2 (27...Be5 28.Bd2+=) 28.Ke2 Nc3 29.Ke1 (29.Kd2 Nd1 30.Kd1 Be5=) 29...Nd1 30.Kd1 Bd7 (30...Be5 31.h3=) 31.Kc2 Ba4 (31...Be5 32.f4 Bf6 33.e4=) 32.Bb2 Bg5 33.Bd4 (33.f4 Bh4=). Diener,Rudolf – Harriman,A, corr ICCF WT–M–GT–216, 1988.

6.Nf3 a5 7.b5=.

6.Nf3 Nbd7 7.Nc3 Be7 8.Bd3 0–0 9.0–0 h6 (9...c5 10.Ng5=) 10.h3 (10.Bc2 Ne5 11.Ne5 de5=) 10...Re8 (10...e5 11.Bc2=) 11.Nh2 (11.Bc2 Ne5 12.Ne5 de5=) 11...a6 (11...c5 12.Bc2=+) 12.f4 (12.Be2 c5=) 12...d5 (12...c5 13.Nf3=+) 13.Qe2 (13.cd5 ed5 14.Nf3 c5=+) 13...c5 (13...dc4 14.Bc4 b5 15.Bd3=+) 14.b5 d4 (14...ab5 15.Nb5 Bc6 16.Nf3=+) 15.Nd1 (15.ba6 Ba6 16.Nd1 Bb7=+) 15...Nf8 (15...ab5!? 16.cb5 e5–/+) 16.e4 (16.ba6 Ra6 17.Nf3 Ne4 18.Be4 Be4 19.ed4 Bf3 20.Rf3 cd4=+) 16...Ng6 (16...Ng6 17.e5 Nd7=; 16...ab5!? 17.cb5 c4 18.Bc4 Ne4–/+). Schreiner – Richardson, Maryland, 1986.

6.Nf3 Nbd7 7.Nc3 Be7 8.d4 0–0 9.Bd3 Re8 (9...c5 10.0–0=) 10.0–0 Bf8 (10...c5 11.d5+=) 11.e4 (11.d5 Ne5+=) 11...e5 (11...c5 12.d5+=) 12.d5 g6 (12...g6 13.Bc1 Bg7+–; 12...Be7 13.Bc1+=). Schiffler – Rittner, Riesa, 1952.

6.Nf3 Nbd7 7.Nc3 Be7 8.d4 a5 9.b5=.

6.Nf3 Nbd7 7.Nc3 Be7 8.d4 c5 9.Bd3=.

6.Nf3 Nbd7 7.Nc3 Be7 8.d4 Ne4 9.Qc2 (9.Ne4 Be4 10.Bd3 f5+=) 9...Nc3 10.Bc3 Bf6 (10...Bf3 11.gf3 Bf6 12.b5=) 11.Bd3 (11.Be2 c5+=) 11...Qe7 (11...Bf3 12.gf3 c5 13.dc5 (worse 13.Bh7 cd4 14.Bd4 Bd4 15.ed4 Rc8–/+) 13...bc5 14.Be4=) 12.a4 (12.Be4 Be4 13.Qe4 0–0+=) 12...e5 (12...Bf3!? 13.gf3 c5=) 13.Be4+= Be4 14.Qe4 0–0 (14...0–0 15.a5 Qe8+=; 14...Rd8 15.d5+=). Schiffler – Muehlmann, Bad Lausick, 1951.

6.Nf3 Nbd7 7.Nc3 Be7 8.Be2 0–0=.

6.Nf3 Nbd7 7.Be2 Be7 8.Nc3 0–0 9.0–0 a6 (9...a5 10.b5=) 10.Rc1 (10.d4 c5=) 10...c5 11.d3 Qc7 12.Nd2 Rac8 13.Re1 Rfd8 14.f4 Bf8 (14...d5 15.cd5 ed5 16.bc5 bc5 17.Bf3=) 15.Bf3 g6 (15...d5 16.cd5 ed5 17.b5=) 16.Bb7 (16.b5 Bf3 17.Qf3 a5+=) 16...Qb7= 17.Nce4 (17.b5 Bg7=) 17...Ne4 18.Ne4 Qc6 (18...d5 19.Nf6 Nf6 20.Bf6=) 19.Qg4 (19.Qd2 d5 20.cd5 Qd5 21.bc5 Bc5 22.Nc5 A) worse 22...Nc5 23.Qc3 e5 24.Red1+– (worse 24.Qe5 Qe5 25.Be5 Nd3 26.Rc8 Rc8–/+); B) 22...Rc5=) 19...Bg7 (19...cb4 20.ab4 d5 21.cd5 Qd5 22.Qh4+=) 20.Bg7 Kg7 21.Qh4 d5 22.cd5 (22.b5 ab5 23.cb5 Qc7= (worse 23...Qb5 24.Nd6 Qa4 25.Qe7+=)) 22...ed5 23.Ng3 Qf6 ½–½. Cottarelli,Franco (1950) – Boni,Gianni (1730), 5th Rivarolo Mantovano Weekend, 2007.

6.Nf3 Nbd7 7.Be2 Be7 8.d4 0–0 9.Nbd2 Ne4 (9...c5 10.0–0=) 10.0–0 (10.Ne4 Be4 11.0–0 c6+=) 10...Nd2 11.Qd2 (11.Nd2 c5+=) 11...Nf6 12.Ng5 (12.Rfd1 d5+=) 12...Ne4 (12...d5 13.c5+=) 13.Ne4+= Be4 14.f3 Bb7 (14...Bg6 15.e4+=) 15.Bd3 g6 (15...c5 16.Qc2 f5 17.d5+=) 16.e4+/– Bf6 17.f4 (17.Rad1 e5+/–) 17...c5+= 18.Bc2 (18.dc5 dc5 19.e5 Be7+=) 18...cd4 (18...Rc8 19.Qd3=) 19.Bd4 e5 (19...Rc8 20.Bf6 Qf6 A) worse is 21.Qd6 Rc4 22.Qd7 Bc6–/+ (22...Rc2?! 23.Qb7 Qb2 24.e5+=); B) 21.Qd3=) 20.Bc3 (20.Bb2 ef4 21.Bf6 Qf6=) 20...ef4 (20...Rc8 21.fe5 Be5 22.Rad1+=) 21.Rf4 Be5 22.Rf3 (22.Rf2 Qc7 23.Bd3 Rae8=) 22...Qc7= 23.Be5 de5 Black gets strong play along the open d–file 24.Rc3 Rfd8 25.Qe2 Rd4 Attacking the isolated pawn on e4 26.b5 (better is 26.Rf1!?=) 26...Qc5 Do you see the mate threat? 27.Kh1 Rad8 28.Rf1 (28.Qf3 R8d7 (28...Rc4?! 29.Bb3 Be4 30.Qf1 Bg2 31.Kg2 Rg4 32.Kh1 Rg1 33.Qg1 Qc3 34.Rb1=) 29.Rf1 f5–/+) 28...Bc8 (better is 28...f5!?–+) 29.Qf3+= The backward pawn on f7 becomes a target 29...Be6 The pressure on the backward pawn c4 grows 30.Bd3 Rf8 (30...h6 31.Be2+=) 31.Rfc1 (31.Qe3 f6=) 31...f5 32.ef5 Bf5 33.Bf5 gf5 (33...Rf5!? 34.Qe2 Rdf4+=) 34.Qb7= Rf7 (34...f4 35.Rh3 Rf7 36.Qb8 Kg7 37.Rh5=) 35.Qb8 (35.Rg3 Rg4 36.Rg4 fg4=) 35...Kg7 36.Rg3 Kf6 (36...Rg4 37.Rcc3=) 37.Qh8+= Ke6 38.Rg8 Rfd7?? (better is 38...Rdd7+=) 39.Re8+– Re7 40.Re1 (better is 40.Qg8 Kd6 41.Rc8 Qc8 42.Qc8+–) 40...Re8+/– 41.Qe8 ½–½. Trokenheim,Marek – Karlsson,Bertil, corr SSKK 3–06, 1985.

6.Nf3 Nbd7 7.Be2 g6 8.0–0 Bg7 9.Qc2 0–0 10.d3 c5 11.b5 e5 12.e4 Nh5 13.g3 Ndf6 (13...f5 14.Nc3=) 14.Nbd2 a5 ½–½. Turunz,Dilek – Duru,Ipek, Turkish Championship Women, 2016. (=1.c4 Nf6 2.e3 e6 3.a3 b6 4.b4 Bb7 5.Bb2 d6)

6.Nf3 Be7 7.d3 Controls e4 (7.Nc3 Nbd7=) 7...0–0 8.Nbd2 Nbd7 9.Be2 c5 10.Qc2 Rc8 11.b5 White gains space 11...d5 12.a4 Qc7 (12...a6 13.h3=) 13.Qc3 (13.a5 ba5 14.Bc3 dc4 15.dc4 a4+=) 13...Bd6 (13...a6 14.cd5 ed5 15.ba6 Ba6 16.g3=) 14.cd5 (14.a5 dc4 15.Qc4 Bf3 16.Nf3 Ne5 17.Ne5 Be5 18.Be5 Qe5=) 14...Bd5 (14...ed5!? should be considered 15.Qc1 h6=) 15.e4+= White threatens to win material: e4xd5 15...Bb7 16.Nc4 A valuable piece 16...Be7 17.g4 (17.a5 Ne8+=) 17...Ne8 18.g5 (18.a5 Bd8=) 18...f6 Prevents intrusion on e5 (18...f5 19.gf6 Bf6 20.Qc2+=) 19.h4= Qf4 Black traps the enemy king in the center 20.Bc1 Qg4?? Traps the king in the center (better is 20...Qc7= was necessary) 21.Nfe5 (better is 21.Ng1!? makes it even easier for White 21...Qg2 22.Bf3 Qh1 23.Bh1 Nc7+–) 21...Qe2 (21...Qg2 is one last hope 22.Bf3 Qh1 23.Bh1 fe5 24.Ne5 Rc7+–) 22.Ke2 fe5 23.Ne5 (23.h5 keeps an even firmer grip 23...Rd8+–) 23...Ne5 24.Qe5 Bd6 (24...Rf7+– the only chance to get some counterplay) 25.Qe6 Kh8 26.Bb2 (26.h5 c4 27.h6 cd3 28.Kd3 Rf2 29.hg7 Ng7 30.Rh7 Kh7 31.g6 Kh8 32.Qh3 Kg8 33.Qh7 Kf8 34.Qh8 Ke7 35.Qg7 Ke6 36.Qb7 Rf3 37.Ke2 Rcf8+–) 26...Rc7 27.Raf1 (better is 27.f3!? makes it even easier for White 27...Bc8 28.Qd5 Re7+–) 27...Bc8 (27...c4 a fruitless try to alter the course of the game 28.f3 (28.dc4?! Re7 29.Bg7 Kg7 30.Qh6 Kg8+–) 28...Bc8 29.Qd5+–) 28.Qc4 Rcf7 (28...Bg4 does not improve anything 29.f3 Bh5 30.Rh3+–) 29.e5 (better is 29.h5 makes sure everything is clear 29...Re7 30.h6 Be6+–) 29...Rf4 30.d4 (better is 30.Qd5 finishes off the opponent 30...Be7 31.e6+–) 30...Be5+/– 31.Qd3 (31.f3 Bd4 32.Bc1 Be3+/–) 31...Bf5 (31...Bd4!? deserves consideration 32.Bc1 R4f7+=) 32.Qb3+/– (32.de5 is the less attractive alternative 32...Bd3 33.Kd3 Nc7–/+ (33...Rf2?! 34.Rf2 Rf2 35.e6=)) 32...Re4 33.Kd1 (better is 33.Kd2 Bd4 34.f3+/–) 33...cd4? (better is 33...Bd4 and Black could well hope to play on 34.Bd4 Rd4 35.Kc1 Rb4=) 34.f3 (better is 34.Bc1!? Bg4 35.f3 Bh5+–) 34...Re3+/– 35.Qe3! surprise! 35...de3 (35...de3 36.Be5 Combination) 36.Be5 Bd3 (better is 36...Be6!?+/–) 37.Re1+– Rf3 38.Rhg1 e2? (38...Bc4 39.Rg4 Be6 40.Rd4+–) 39.Kd2 Bc4 (39...Bg6 40.Rg3 Rf5 41.Re2+–) 40.Rg3 (40.Rg4 seems even better 40...Rd3 41.Ke2 Rd4 42.Kf3 Bd5 43.Kg3 Rd3 44.Kh2 Bg8+–) 40...Rf2? (40...Rf7+–) 41.Rc3 Rf5 (41...Bf7 is still a small chance 42.Re2 Rf5+–) 42.Rc4 Re5 43.Rc8 Kg8 44.Re2 Re2 45.Ke2 Kf8 46.Ra8 g6 47.Ra7 Ng7 48.Rb7 Kg8 (48...Ne8 49.Rb6 Ke7 50.a5+–) 49.Rb6 (49.Rb6 Nf5 50.a5+–) 1–0. Lien,Gaute – Herregarden,Bjorn Erik, ASKOs Pinseturnering–B, 2002.

5.a3 Be7

6.Nc3 0–0 7.d3 d5+= 8.cd5 ed5 (8...Nd5 9.Nf3+=) 9.d4 (9.Nf3 c5+=) 9...Nbd7 (9...c5 10.bc5 bc5 11.Nf3+=) 10.Nf3= a6 (10...c6 11.Bd3+=) 11.Bd3 Ne4 (11...c5=) 12.Be4 (12.Qb3!? Ndf6 13.Ne5+=) 12...de4+= 13.Nd2 f5 (13...Nf6 14.0–0+=) 14.0–0 Nf6 15.Ne2 (15.Nc4 Qd7+=) 15...Nd5 Black prepares f4 (15...Bd5 16.Nf4+=) 16.Rc1 (16.Nc4 Qe8+=) 16...f4 (16...a5!? 17.b5 a4–/+) 17.ef4= Nf4 18.Nf4 Rf4 19.Qb3 (19.Qe2 Bd6=) 19...Bd5 20.Qg3 (20.Qc3 Bd6 21.Nc4 Qg5+=) 20...Qd6 (20...Bd6 21.Qe3–/+) 21.Nc4+= Qh6 22.Ne5 Bh4 (22...Raf8 23.Rc2 (23.Rc7? Bh4 24.Qg7 Qg7 25.Rg7 Kg7–+) 23...e3 24.Qe3 Rf2 25.Qf2 Rf2 26.Rff2+=) 23.Qe3 (23.Qh3 Be6 24.Qc3 Rff8=) 23...Bg5 (better is 23...Rf2 24.Qh6 Rf1 (24...gh6?? 25.Rf2 Bf2 26.Kf2+–) 25.Rf1 gh6+=) 24.Qc3? (24.Qe2 Qd6=) 24...Rc8?? (better is 24...e3 25.fe3 Rh4–+) 25.Rc2+= c6 (25...e3 26.f3=) 26.f3 (better is 26.Bc1 Rf5 27.h3+=) 26...ef3–/+ 27.Nf3 Rcf8 28.Rcf2 (28.Bc1 Rf3 29.Rf3 Bf3 30.gf3 Rf6 31.Bg5 Qg5 32.Rg2 Qd5–/+) 28...Rf3 (better is 28...Qg6!? 29.Kh1 R4f7–+) 29.Rf3+= (29.gf3 Be3 30.Qe3 Qe3–+) 29...Bf3 (29...Rf3 30.Rf3 (30.gf3? Be3 31.Rf2 Bf2 32.Kf2 Qh2 33.Ke1 h6–+) 30...Qh5 31.h4 Bf3 32.hg5+=) 30.Rf3 Rf3 31.Qf3 Qe6 32.Kf2 Bf6 (32...g6 33.Qe2 Qf7 34.Ke1+=) 33.Qe3 (33.Bc3 Qd6=) 33...Qe3 (33...Kf7 34.Bc3+=) 34.Ke3= c5 (34...Kf7!?=) 35.bc5+/– bc5 36.Kd3 (36.Ke4 cd4 37.Bd4 Be7+/–) 36...cd4 (36...Kf7 37.Kc4 cd4 38.Bd4+=) 37.Bd4 Kf7?? (better is 37...Be7 38.a4 Kf7+=) 38.Bf6+– Kf6 39.Kd4 (39.Kc4 Ke6 40.Kc5 a5+–) 39...g5 (39...Ke7 40.Kc5+–) 40.g4 (40.Kc5 Ke5+–) 40...Ke6 41.Ke4 a5 (41...Kf6 42.Kd5+–) 42.a4 h6 (42...Kd6 43.Kd4 Kc6+–) 43.h3 Kd6 44.Kf5 (44.Kd4 Kc6 45.Kc4+–) 44...Kc5= 45.Kg6 Kb4 46.Kh6 Ka4 47.Kg5 Kb3? (better is 47...Kb4 48.Kh4 a4=) 48.Kf5+– a4 49.g5 a3 50.g6 a2 51.g7 a1Q (51...Kc2 52.g8Q a1Q 53.h4+–) 52.g8Q Kc2 53.Qc4 (53.h4 Qh1 54.Qc4 Kb2 55.Qd4 Ka2 56.Qd2 Ka1+–) 53...Kd2 54.Qf4 (54.h4 Qh8 55.Qd5 Kc2+/–) 54...Kd3 (54...Kc2 55.h4 Qh8 56.Qc4 Kd2 57.Qd5 Kc2 58.Kg4+/–) 55.h4 Qa5? (better is 55...Qh8+/–) 56.Qe5+– Qa8 (56...Qa7 57.h5+–) 57.h5 Qc8 (57...Qc6 58.Kg5+–) 58.Kg6 Qg8 (58...Qc4 59.h6 Qg4 60.Qg5 Qe6 61.Qf6 Qg4 62.Kh7 Qd7 63.Qg7+–) 59.Kh6 (59.Qg7!? Qd5+–) 59...Qf8 (59...Qf7 60.Qg7 Qf3 61.Qg6 Ke2 62.Kg7 Qb7 63.Qf7 Qb2 64.Qf6 Qb7 65.Kf8+–) 60.Qg7 Qf4 (60...Qf3 61.Qg6 Ke2 62.Qe8 Kd2 63.Kg7 Qc3 64.Kg8 Qc4 65.Qf7 Qg4 66.Qg6 Qc8 67.Kh7 Qd7 68.Qg7 Qf5 69.Kh6+–) 61.Kh7 Qh4 (61...Ke2 62.h6+–) 62.h6 Kc4 (62...Qd8 63.Qf7+–) 63.Kh8 Kc5 (63...Kb4 64.Qf8 Kb5 65.h7+–) 64.Qe5 Kc6 (64...Kb4 65.h7+–) 65.h7 Qg4 66.Qg7 (66.Qf6 Kb5+–) 66...Qe6 67.Qf8 Qg6 (67...Kd7 68.Qf4 Qg6 69.Qd4 Ke7 70.Qe5 Kf7 71.Qc7 Ke8 72.Qb8 Ke7 73.Qb4 Kf7 74.Qc4 Ke7 75.Qc5 Kf7 76.Qd5 Ke7 77.Qb7 Kf8 78.Qc8 Ke7 79.Qc3 Qe8 80.Kg7 Qf7 81.Kh6 Qf4 82.Kg6 Qg4 83.Kh6 Qf4 84.Kh5 Qf5 85.Kh6 Qf4=) 68.Qc8 Kd6 (68...Kb6 69.Qd8 Kc5 70.Qc7 Kb4 71.Qb8 Kc5 72.Qe5 Kc6+–) 69.Qa6 1–0. Freyser – dannyboy238, ChessWorld.net, 2004. (=1.c4 Nf6 2.b4 b6 3.Bb2 e6 4.a3 Bb7 5.e3 Be7)

6.Nc3 0–0 7.Nf3 c5 (7...a5 8.b5= d6 9.Be2 Nbd7 10.0–0; 7...Nc6 8.Be2 Bd6 9.Nb5 Be7 10.Nc3) 8.b5 (8.bc5 bc5 9.Rb1 (9.Bd3 Nc6 10.Rb1) 9...d6= (9...Nc6 10.Bd3) 10.Be2) 8...d5+= (8...d6 9.Bd3 Nbd7 10.0–0) 9.cd5 ed5 (9...Nd5 10.Qc2) 10.Be2 (10.Bd3 a6=) 10...Re8 (better is 10...d4 11.Na2 d3–/+) 11.0–0?? (better is 11.d4+=) 11...d4–+ 12.ed4 (12.Bc4 dc3 13.Bc3–+) 12...cd4 13.Bc4 (13.Qb3 dc3 14.Bc3 Bd5–+) 13...dc3 14.Bc3 Bd5 15.Be2 (15.Qb3 Bc4 16.Qc4 Qd5 17.Qd5 Nd5–+) 15...Nbd7 16.Re1 Ne4 (16...Rc8 17.Qc2–+) 17.Bb2 (17.Bb4 Bc5 18.d4 Bb4 19.ab4 Nc3–+) 17...Bf6 (17...Rc8 18.d4–+) 18.d4 Ng5 (better is 18...Ndc5 19.Rb1 Ne6 20.Rc1–+) 19.Nh4 (19.Ne5–+) 19...Nh3! 20.gh3 Bh4 21.Bc1 (21.Qd2–+) 21...Qf6 22.Rf1 Qg6 23.Bg4 f5 0–1. Gutsche,Armin – Katte,Isabel, Gross Gerau op 3rd, 2000.

6.Nc3 Nc6 7.Nf3 0–0 8.Be2 Bd6 9.Nb5 Be7 10.Nc3.

6.Bd3?? 0–0 (better 6...Bg2 7.Nh3 Bh1–+ (7...Bh3?! 8.Qf3–/+)) 7.Nf3= h6 (7...c5 8.bc5 Bc5 9.0–0=) 8.Bc2 (8.0–0 a6=) 8...Nc6 (8...a5 9.b5=) 9.d4 (9.0–0 a5 10.b5 Na7+=) 9...a5 10.d5 ed5 (10...Nb8 11.Qd3 Re8 12.b5=) 11.cd5 Nb8 12.e4 (12.ba5!? Ra5 13.e4=) 12...ab4=+ 13.ab4 (13.0–0 Re8=+) 13...Bb4 (13...Ra1 14.Ba1 Bb4 15.Nbd2–/+) 14.Nbd2=+ Qe7 (better 14...Ba6 15.Ra4 Bc5=+) 15.e5? (better 15.Ra8 Ba8 16.0–0=) 15...Nd5 (15...Ra1 16.Ba1 Nd5 17.0–0–+) 16.0–0 (16.Ra8 Ba8 17.0–0 Nf4–+) 16...Na6 (16...Ra1 17.Ba1 Nf4 18.Be4 Be4 19.Ne4–+) 17.Nc4 (better 17.Ne4–+) 17...Nc3?? (17...Nc5 18.Qd4–+) 18.Qd3?? (better 18.Bc3 Bc3 19.Qd3+–) 18...Nc5?? (better 18...Be4 19.Qd2 Nd5–+) 19.Qh7 1–0. Agiant – Mh1933, lichess.org, 2019.

6.d4 0–0 7.Nf3 a5!?+=.

6.d4 0–0 7.Nf3 d6 8.Bd3 Nbd7 9.Nbd2 c5 10.0–0 Rc8 11.Re1 Qc7 12.Rc1 Qb8 13.Bb1 Qa8 14.e4 cd4 15.Nd4 Rfe8 16.f3 a6 17.Qe2 Bd8 18.b5 a5 19.Qf2 Rc5 20.Nf1 a4 21.Ne3 Bc7 22.Bc3 Qb8 23.Ne2 d5 24.Ng3 (better is 24.f4!? dc4 25.e5=) 24...de4–/+ 25.Ng4? (better is 25.Bd4!? Rg5 26.Nef1 ef3 27.gf3–+) 25...Ng4–+ 26.fg4 Bg3 27.hg3 Rc4 28.Ba2 (28.Rf1 Rf8–+) 28...Rcc8 (28...Rc5!? 29.Bb1–+) 29.Rf1 (29.Qd4 Nf6 30.g5 Red8 31.Qb6 Nd5 32.Bd5 Rd5–+ (32...Bd5?! 33.Qd4 Rc3 34.Rc3–/+; 32...ed5?! 33.Qd4 f6 34.gf6 Qg3 35.fg7=)) 29...Rf8 30.Qd4 Rc3 (30...Nf6!? 31.g5 Rfd8 32.Qf2–+) 31.Rc3–/+ Nc5 32.Kh2 Rd8 33.Qf2 Qc7 34.Bb1 Qe7 35.Qe3 Rd5 (better is 35...Qe8!? 36.Qe2 Qd7–+) 36.Be4+= Ne4 37.Qe4 f6 (37...Rd2 38.Qa4 Rg2 39.Kh3+=) 38.Qe3 (38.Qa4 Rd2 39.Rc2 Qd7+=) 38...Qd6 (38...Rb5 39.Rfc1 Qd6 40.Qf4 Qf4 41.gf4+=) 39.Rfc1 (39.Qf4!? Qf4 40.gf4 Rb5 41.Rd1=) 39...Rb5+= 40.Rc7 Rb3 (40...Re5 41.Qf2 Be4+= (41...Qa3 42.Qb6 h6 43.Qb7+–)) 41.Qf4+/– Qd5? (better is 41...Qf4 42.gf4 Be4+/–) 42.Rb7!+– Qb7 (42...Qb7 43.Qa4 Combination) 43.Qa4 (43.Qa4 h6 44.Qb3+–) 1–0. Ileniak,Vasil – Masliak,Danilo (2150), Rodatychi op, 2006.

6.d4 0–0 7.Nf3 d6 8.Bd3= Nbd7 9.Nbd2 c5 10.0–0 d5 (10...cb4 11.ab4 a5 12.e4+=) 11.b5 (11.bc5 bc5 12.Rb1 Rb8=) 11...Ne4 (11...a6 12.ba6 Ba6 13.Qb3=) 12.cd5 ed5 13.Rc1 (13.Qc2 a6+=) 13...f5 14.Ne5 (14.dc5 bc5 15.a4 Rc8=) 14...Rc8 (14...Ne5 15.de5 c4 16.Ne4 fe4 17.Be2+=) 15.Ne4 (15.dc5!? Ne5 16.Be5 bc5 17.a4=) 15...fe4+= 16.Nd7 (16.Be2 Ne5 17.de5 c4+=) 16...Qd7 17.Be2 c4 (17...Bf6 18.Bc3 Qf7 19.dc5 bc5 20.Bf6 Qf6 21.Qa4=) 18.Bg4 Qb5 19.Bc8 Bc8 20.Qe2 a5 21.f3 (21.Qc2 Qb3=) 21...Bf5 (21...ef3 22.Rf3 Rf3 23.gf3+=) 22.f4 h5 (22...Qa4 23.Rc3+=) 23.h3 (23.a4 Qa4 24.Qh5 Qb3–/+) 23...h4+= 24.Kh2 Rf6 25.Rg1 Rh6 (25...Qa4 26.Rc3+=) 26.Rc3= Qd7 27.Ra1 (27.Rb1 Rc6=) 27...Rg6 (27...Rc6 28.Rb1+=) 28.Bc1 (28.Rb1!?=) 28...b5+= 29.Bd2 b4 30.ab4 ab4 31.Ra8 Kf7 (31...Bf8 32.Rc2 b3 33.Bb4 bc2 34.Rf8 Kh7 35.Qc2+=) 32.Rc1 Rc6 33.Qh5 Bg6 34.Qh8 Bf5 (34...Qe6 35.Be1 Rc7 36.Qg8 Kf6 37.Bh4 Kf5 38.g4) 35.Rg8 (35.Qh5 Ke6+=) 35...Rg6 36.Rb8 c3 (36...Bd6 37.Qg8 (37.Bb4?! Bb4 38.Qg8 Kf6 39.Rb4 Qd6+–) 37...Kf6 38.Bb4 Bb8 39.Qf8 Qf7 40.Qd8 Ke6 41.Qb8+–) 37.Qg8 Kf6 38.Be1 Rh6 39.Ra1 (39.Rb6 Be6=) 39...Be6 (39...Qe6 40.Qe8=) 40.Rb6 (40.Ra6 Bd6 41.Rd8 Bg8 42.Rd7 Kf5 43.Rdd6 Rd6 44.Rd6 g5 45.fg5 Kg5+–) 40...Bd6+= 41.Qa8 Kf5 (41...Kf7 42.Ra7 Bc7 43.Rbb7+– (43.Rb4?! c2 44.Bd2 Bf5+/–)) 42.Raa6 (42.Ra7!? Qc8 43.Rd6 Qa8 44.Ra8+/–) 42...Be7+= 43.Bh4 Rh4 (43...Bh4 44.g4) 44.g4 Rg4?? (better is 44...Kf6–+) 45.hg4+– Kg4 46.Kg2 (46.Qh8 Kf3 47.Re6 Ke3 48.Qh3 Kd4 49.Re4 Ke4 50.Qd7+–) 46...Qc8? (46...c2 47.Qh8 Bh4 48.Re6 Qe6 49.Re6 g5 50.Re5 c1Q 51.Rg5 Bg5 52.Qh3) 47.Re6+– (47.Re6 Qa8 48.Ra8+–) 1–0. Seisler,Dimitri (2330) – Arvoll,Olav (2200), corr ICCF Nordbalt Senior, 1995.

6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

6.Nf3 0–0 7.d4 c5 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.d4 c5).

5.a3 g6

6.d4 a5 7.b5 Bg7=.

6.Nf3 Bg7 7.Be2 d6 8.0–0 0–0 9.d4 c6 (9...c5 10.Qb3=) 10.Nbd2 c5 11.Qb3 Nbd7 12.Rfd1 (12.bc5 dc5 13.h3 Qc7=) 12...Qc7= 13.dc5 dc5 14.Nf1 (14.h3 e5=) 14...Rfd8 (14...e5 15.Ng3=) 15.Ng3 Ne4 (15...a5 16.h3=) 16.Bg7 Kg7 17.Qb2 f6 (17...Nef6!?=) 18.Ne4+= Be4 19.Ng5 Bf5 20.e4 (20.g4 h6 21.gf5 hg5 22.fe6 Nf8+=) 20...h6 (20...Qe5 21.Rab1 Qb2 22.Rb2 fg5 23.ef5+=) 21.Bf3 (better is 21.ef5 hg5 22.fe6+/–) 21...Ne5? (better is 21...hg5 22.ef5 ef5 23.Ba8 Ra8+/–) 22.ef5+– hg5 23.Ba8 Ra8 24.fe6 Qe7 (24...Re8 25.Rd5+–) 25.Rd5 (25.bc5 Qc5 26.Qb4 Kf8+–) 25...cb4 26.ab4 Qe6 27.Qe2 Qc6 (27...Qf7 28.Rad1+–) 28.Rd4 (28.Qe4!? Qc7 29.Rc5 Qb8+–) 28...Qc7 (28...a5 29.ba5 ba5 30.Qe1+–) 29.Rad1 Rc8?? (29...g4 30.h4 Rf8 31.Rd5+–) 30.Qa2 (better is 30.Rd7! Nd7 31.Qe7 Kh6 A) worse is 32.Qd7 A1) 32...Qc4?? 33.Qh3 (33.Qa7 Rd8 34.Ra1 Qb4+=) 33...Kg7 34.Rd7 Qf7 35.Rf7 Kf7 36.Qc8+–; A2) 32...Qd7 33.Rd7 Rc4+=; B) 32.Rd7 Qd7 33.Qd7 Rc4 34.g4+–) 30...Qe7 (30...a5 31.Qb3+–) 31.b5 Rc7 32.h3 Qb4 33.Rc1 Qc5 34.Qd2 Qe7 35.Rd8 Rd7? (better is 35...g4 36.h4 Qe6+–) 36.Rd7 Nd7 37.Re1 (better is 37.Ra1!? Ne5 38.Qa2 Kf8+–) 37...Ne5 38.Rc1 Qc5?? (38...Nd7 39.Ra1 Ne5+–) 39.Qd5 Qa3 40.Qd1 Qc5 41.Qe2 Qe7 (41...a6 42.ba6 Qa3 43.Qd1 Qa6 44.Qd4+–) 42.Rc2 (42.Ra1 f5+–) 42...Qc5 (42...Kh6 43.Qe3 Qd6 44.Rc1+–) 43.Qe4 (43.Qe3 Qb4+–) 43...Qe7 (43...Qa3 44.Qd4 Qb4 45.Rc1+–) 44.Kf1 (44.Ra2 g4 45.hg4 g5+–) 44...Qc7 (44...Qd7 45.Qd5 Qf5 46.Re2 Qb1 47.Re1+–) 45.Qd5 (better is 45.Qd4 Qc8 46.Rc1+–) 45...Qe7? (45...g4 46.hg4 Kh6 47.Qd4+–) 46.Ra2 (better is 46.c5 bc5 47.Qc5+–) 46...Qc7 47.Rc2 Qe7 48.c5 bc5 49.Qc5 Qe6 Black intends g4 (49...Qc5 50.Rc5 Kf7+–) 50.Qa7 Kh6 51.Rc7 g4 52.h4 (52.Rh7 Kg5 53.Qe3 Kf5 54.hg4 Ng4 55.Qd3 Qe4 56.Qe4 Ke4 57.b6+–) 52...g5 53.Rh7 Kg6 54.h5 Kf5 55.Qc5 (55.Qa4 Qc8 56.Qb3 g3 57.fg3 Qc1 58.Ke2 Kg4+–) 55...Qa2 (55...Qb3 56.Rd7 Qb1 57.Ke2 Qe4 58.Kd2 Qf4 59.Kc2 Qe4 60.Kc3 Qg2 61.Rd6 Qf3 62.Kb2 Qe2 63.Qc2 Qc2 64.Kc2+–) 56.Qc8 (56.Kg1 Qb3 57.g3 Qd1 58.Kh2+–) 56...Kf4 (56...Ke4 57.Qc1 g3 58.fg3 Qb3+–) 57.g3 Ke4 58.Qa8 (better is 58.Re7 Qb1 59.Kg2 Qb5 60.Qg4 Kd5 61.Qe6 Kd4 62.Qd6 Qd5 63.Qd5 Kd5 64.Re5 Ke5 65.h6+–) 58...Qa8 59.b6 (59.Rf7 Nf7 60.b6 Ne5 61.Ke2 Qd8 62.f3 gf3 63.Kf2 Qb6 64.Kf1 Nd3 65.h6 Qf2) 59...Kf3 60.Ra7 Qc6 (60...Qe4 61.Ra3 Nd3 62.Rd3 Qd3 63.Kg1 Qd1 64.Kh2 Kf2 65.b7 Qg1) 61.Ra3–+ Ke4 62.Rb3 Qc4 63.Kg2 Qb3 64.h6 (64.b7 Qb7 65.f3 gf3 66.Kf2 Qb2 67.Kf1 Nd3 68.h6 Qf2) 64...Qb6 0–1. Bartle,Georg (1675) – Ott,Lothar, 2rd Berlin Germany, Senior Championship, 2010.

6.f4 a5 7.ba5 Ra5 8.Bc3 =+.

6.f4 Bg7 7.Nf3 d5 (7...0–0 8.Be2=) 8.Be2 0–0 9.0–0 dc4 10.Bc4 a5 11.b5 Nbd7 (11...c5 12.Nc3=) 12.Qe2 (12.Qc2 c5=) 12...Ne8 (12...c5 13.bc6 Bc6 14.Ne5=) 13.Bg7+= Kg7 14.Ng5 (14.Ne5 Nd6+=) 14...Qf6 15.Nc3 Nd6 16.Ba2 (16.d4 Rac8+=) 16...h6= 17.Nf3 Ne4 (17...c5 18.Qd3 Qe7 19.Bc4=) 18.Rac1 (18.Ne4 Be4 19.d3 Bb7+/–) 18...c5 19.bc6 Bc6 20.Nd4 (20.d4 Rfd8+=) 20...Bb7 (20...Nc3 21.Rc3 Be4 22.d3+/–) 21.Ncb5 (21.Ne4 Be4 22.d3 Bd5+/–) 21...Nec5 22.Nd6 Bd5 (22...Rfd8 23.d3+=) 23.Bb1 (23.Bd5 ed5 24.Qg4 Kh7+/–) 23...e5 (23...Rfd8 24.d3=) 24.fe5+= Qe5 25.N4f5?? (better is 25.Nc4 Bc4 26.Rc4+=) 25...Kh7?? (25...gf5 26.Nf5 Kh7+=) 26.d4+– Qe6 27.dc5 Nc5 28.Qf2 (better is 28.Qb2!? f6+–) 28...Kh8 29.Nh6?? (29.e4 gf5 30.Qd4 (30.ed5?! Qd6 31.Qf5 Qg6+–) 30...Kg8 31.Nf5+– (31.Qd5?! Ne4 32.Qf5 Ng5+–; 31.ed5?! Qd6 32.Bf5 Rad8+/–)) 29...Qd6+= 30.Qh4 (30.e4 Bb3+=) 30...Kg7 31.Nf5 gf5 32.Rf5 (better is 32.Bf5 Rh8 33.Qd4 Kg8 34.g3–+) 32...f6?? (better is 32...Rfd8–+) 33.Rd5!+– Rh8 (33...Qd5 34.Qh7) 1–0. Valles,A – Navarro,A, AU2EQ11 JAQUE–P.FRAG, 1993.

5.b5

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

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

5.b5 c5 6.Nf3 d5 7.Be2 Nbd7 8.0–0 Be7 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).

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

5.b5 Be7 6.d4 0–0 7.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4 0–0 7.d4).

5.b5 Be7 6.Nf3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 Be7 6.c4).

4.c4 Qg5

5.Nf3 Qg4 6.h3 Qg6 7.a3 Nf6 8.d4 h6 9.Nbd2 Ne4 10.Qc2 Nd2 11.Qd2 Bf3 12.gf3 Qf5 13.Bg2 Nc6 14.b5 Na5 15.Qe2 Qg6 16.Rg1 Qh5 17.Qd3 Rb8 18.f4 f5 19.Bc3 Nb7 20.a4 Be7 21.a5 Qf7 22.ab6 ab6 23.Ra7 Nd8 24.Rc7 0–0 25.Rd7 Qe8 26.Ra7 Bf6 27.Ke2 Rf7 28.Rga1 Ra7 29.Ra7 Nf7 0–1. karoo54 – grubedrzewo, kurnik, 2012.

5.Nf3 Qg6 6.a3 Bf3 7.Qf3 c6 8.Nc3 Be7 9.d4 a6 10.Rd1 Qc2 11.Qe2 Qe2 12.Be2 Bf6 13.Ne4 Ke7 14.h3 Nh6 15.Bf3 (15.Nf6 Kf6 16.d5 Kg6+–) 15...Nf5 (better is 15...d5!? 16.Nf6 Kf6+=) 16.Nf6+– gf6 17.b5 (better is 17.d5+–) 17...c5?? (better is 17...ab5 18.cb5 Nh4=) 18.Ba8 ab5 19.cb5 d6 20.Bf3 Nd7 21.Ke2 e5 (21...c4 22.g4 Nh4 23.Bc6+–) 22.d5 Ra8 23.g4 Nh4 24.Be4 Ng6 25.Bc2 Ra5 26.a4 h6 27.h4 Ngf8 28.h5 Ke8 29.Bc3 Ra8 30.f4 Kd8 31.Kf3 Nb8 32.Rhe1 Nfd7 33.Ra1 Ke7 34.a5 ba5 35.Ra5 Ra5 36.Ba5 Nf8 37.Ra1 Nfd7 38.Bc7 c4 39.Ra7 c3 40.Bb8 Kd8 41.Bf5 Nc5 42.Bd6 e4 43.Be4 Ne4+– 44.Ke4 c2 45.Rc7 c1Q 46.Rc1 Kd7 47.Bc5 f5 48.Kf5 f6 49.e4 Kd8 50.Kf6 Kd7 51.e5 Kd8 52.e6 Kc7 53.Bd4 Kd6 54.e7 Kd5 55.e8Q Kd4 56.Qe5 Kd3 57.Rd1 Kc2 58.Qd4 Kb3 59.Rb1 Kc2 60.Qd1 Kc3 61.Rb3 Kc4 62.b6 Kc5 63.b7 Kc6 64.Qc2 Kd7 65.Rd3 Ke8 66.Qc8# (66.b8Q#) 1–0. slax1 – tyk, kurnik, 2011.

5.Nf3 Qg6 6.b5 Be4 7.Nc3 Bc2 8.Qc1 Bd6 9.g3 Be4 10.Be2 Bd3 11.0–0 Be2 12.Ne2 Qe4 13.Bg7 Qf3 14.Nd4 Qh5 15.Bh8 Be5 16.Be5 Qe5 17.f4 Qe4 18.a4 Nh6 19.a5 Ng4 20.ab6 cb6 21.c5 bc5 22.Qc5 Qb7 23.h3 Nf6 24.Rfc1 Ne4 25.Qc8 Qc8 26.Rc8 Ke7 27.Nf3 Ng3 28.Kf2 Ne4 29.Ke2 Nd6 30.Rc7 Nb5 31.Rb7 a6 32.Nd4 Nc6 33.Nc6 Kd6 34.Nd4 Nc7 35.e4 Rg8 36.Kf3 f6 37.d3 Rf8 38.Rc1 e5 39.fe5 fe5 40.Nf5 Ke6 41.Rcc7 h5 42.Rd7 a5 43.Re7 Kf6 44.h4 a4 45.Rb6 1–0. thecat74 – stankonar, kurnik, 2012.

4.c4 h5

5.Nf3 Be7 6.Bg7 Rh7 7.Bc3 Bf6 8.d4 Nc6 9.b5 Na5 10.Ba5 ba5 11.Nbd2 Nh6 12.Bd3 Rg7 13.g3 h4 14.0–0 hg3 15.fg3 Ng4 16.Qe2 Ke7 (16...a6 17.Rab1+/–) 17.Rae1 Qh8 18.Be4 Be4 19.Ne4 Rag8 20.Nf6 Nf6 21.Rf2 Ne4 22.Rg2 Qh3 23.Ne5?? (better is 23.Rf1+/–) 23...Ng3–+ 24.hg3?? (24.Qf3 f6 25.hg3 Rg3 26.Qg3 Rg3 27.Ng6 Kf7 28.Nf4 Rg2 29.Ng2–+) 24...Rg3 25.Rg3 Rg3 26.Kf2 Rg2 27.Kf1 Qh1# 0–1. typ48 – dziadekaxel, kurnik, 2011.

5.Nf3 Nf6 6.a3 Be7 7.Be2 Nc6 (7...a5 8.b5+=) 8.Nc3 Ng4 9.h3 Nh6 10.Qc2 Bf6 11.b5 Ne5 Black fights for the Initiative 12.Ne5 Be5 13.f4?? (better is 13.d4 Bd6 14.Ne4+/–) 13...Qh4 14.Kd1 Bf6 (14...Bg2 15.Rg1 Qf2 16.Re1 Bc3 17.Bc3–/+) 15.Bf1 (15.Bf3 Bf3 16.gf3 a6=) 15...Qf2 16.Kc1 Nf5 17.Nd1 Qh4 18.Bf6 gf6 19.c5 Ng3–/+ 20.Rg1 Nf1–+ 21.c6 dc6 22.Rf1 c5 23.e4 Qg3 24.Ne3–/+ f5 25.ef5+= ef5 26.Nf5 Qg6 27.Re1+= Kd8?? 28.Qd3+– Kc8 29.Ne7 Kb8 30.Ng6 fg6 31.Re7 a5 32.Qd7 Ka7 33.Qc7 Rab8 34.Re6 Rhf8 35.Qb6 Ka8 36.Qa5 (36.Qa5 Ba6 37.Qa6) 1–0. orangutanb4 (2090) – dziadekaxel, kurnik, 2011.

5.Nf3 h4 6.h3 Bf3 7.Qf3 Nc6 8.a3 d5 9.b5 Na5 10.cd5 Qd5 11.Qd5 ed5 12.Nc3 Nb3 13.Rb1 Ba3 14.Ba3 Nc5 15.Nd5 Kd7 16.Bc5 bc5 17.Rc1 a6 18.Rc5 ab5 19.Rc7 Kd6 20.e4 b4 21.Bc4 Nf6 22.Rf7 Nd5 23.Bd5 Ra1 24.Ke2 Rh1 25.Rg7 Rb1 26.Rb7 Re8 27.f3 Kc5 28.Rc7 Kd4 29.Rc4 Ke5 30.Ke3 b3 31.f4 Kf6 32.Rc6 Kg7 33.Rb6 b2 34.Kd3 Ra8 35.Kc2 Raa1 36.e5 Rc1 37.Kb2 Rab1 38.Ka2 Rb6 39.f5 Rc2 40.Ka3 Rd2 41.f6 Kf8 42.Bf3 Rdb2 43.Bg4 Rb1 44.Ka2 R1b5 45.e6 Ra5 0–1. thecat74 – pulkownik2, kurnik, 2012.

4.c4 h6

5.Nf3 Bb4 6.Bg7 Rh7 7.Bb2 a5 8.a3 Be7 9.Be2 Bf6 10.Bf6 Qf6 11.Nc3 Nc6 12.0–0 0–0–0 13.d4 Nge7 14.Ne4 Qg6 15.Ng3 d5 16.Rc1 dc4 17.Rc4 Rg7 18.Qc2 Qc2 19.Rc2 f5 20.Rfc1 h5 21.Nh5 Rg5 22.Nf4 e5 23.Ng5 ef4 24.Bf3 Rg8 25.Ne6 Nd4 26.Bb7 Kb7 27.Rc7 Ka6 28.Nd4 fe3 29.Re7 ef2 30.Kf2 f4 31.Nf3 1–0. vihavald – barberi, kurnik, 2012.

5.Nf3 Bf3 6.Qf3+= c6 7.b5 Qc7 8.Nc3 a5 9.Be2 Ra7 10.0–0 Qb7 11.Qg3 c5? (better is 11...Qc7+/–) 12.Bf3 Qc7 13.Qh3 (better is 13.Qc7!? Rc7 14.Na4+–) 13...Nf6 14.Ne4 Ne4 15.Be4 Qd6 16.d4 cd4 17.Bd4 Qb4?? (17...Rc7!?+/–) 18.Rac1 (better is 18.Bb6 Ra6 19.ba6 Qb6 20.Rfb1+–) 18...Rc7 19.Bb6 Rc4 20.Bf3 Rc1 21.Rc1 Qb5?? 22.Bd4 Nc6+= 23.Bc6 dc6 24.Qg3 Be7 25.Qg7 Rf8 26.Qg3 Ba3 27.Rf1 Bc5 28.Bf6 Be7+/– 29.Be5 f6 (29...f6 30.Qg6 Rf7+/–). lican – konrad05, kurnik, 2012.

5.Nf3 Nf6!? 6.a3 Be7=.

4.Be2??

4...Bb4?? 5.Bf3 c6 6.Bg7 +–.

4...Qe7?? 5.Nf3 Qb4 6.Ba3 Qa5 7.Bf8 Kf8 8.Ne5 f6 9.Nf3 Ne7 10.0–0 Nbc6 11.d4 g6 12.c4 Kf7 13.d5 ed5 14.cd5 Nd5 15.Bc4 Ne5 16.Ne5 fe5 17.Qf3 Ke6 18.e4 Raf8 19.Bd5 Bd5 20.ed5 Qd5 21.Qc3 c5 22.Nd2 Qd4 23.Qc2 d5 24.Rad1 Kd6 25.Nb3 Qf4 26.g3 Qf3 27.Qd2 d4 28.a4 h5 29.Nc1 h4 30.Qd3 e4 31.Qf3 Rf3 32.Ne2 hg3 33.fg3 Rf1 34.Rf1 Kd5 35.Nc1 e3 36.Nd3 c4 37.Nb4 Kc5 38.Nc2 e2 39.Re1 d3 40.Ne3 Kd4 41.Kf2 c3 42.h4 Rf8 43.Kg2 Ke3 44.h5 d2 45.Re2 Ke2 46.Kh3 d1Q 47.h6 1–0. arti000 – bingo01, kurnik, 2012.

4...Bg2–+ 5.Bf3 Bf3?? 6.Qf3 Nc6 7.b5 Na5 (7...Nb4 8.Kd1 a6 9.a3–/+) 8.Nh3 Qe7?? (better 8...Nc4 9.Bc3 Ne7–/+) 9.Qa8+– Qd8 10.Qf3 (10.Qa7 Nc4 11.Bc3 Nd6+–) 10...Nc4 11.c3 (better 11.Bc3+–) 11...Nb2+= 12.Rg1 Nd3 (12...d5 13.Nf4+=) 13.Ke2+– Nc5 (13...Ne5 14.Qb7+=) 14.Ng5 (14.d4 Na4+–) 14...Nf6 15.Na3 (better 15.d4!? Na4 16.Qb7+–) 15...h6= 16.Qh3 d5 17.Nc2 Qd7 18.a4 Nce4 (18...Nfe4 19.Nd4=) 19.Nf3 (better 19.Nd4+=) 19...c6? (19...c5 20.Ne5 Qc7 21.Nc6=) 20.Ncd4 (better 20.Ne5!? Qc7 21.Nc6+–) 20...c5+= 21.Nc6 White prepares the advance a5 21...c4 (21...a5!?+=) 22.Nfe5 Qc7 (22...Qc8+–) 23.f3 (23.a5 Qc8+–) 23...Nc5? (better 23...Nd6+=) 24.a5+– Nb3?? (better 24...Qc8 25.Na7 Qb7+–) 25.ab6 Qb6 26.Ra7 Be7 (26...Qa7 27.Na7 Bd6+–) 27.Ra8 (27.Re7 Kf8 28.Rf7 Ke8 29.Qe6) 27...Bd8+– 28.Rd8 Qd8 29.Nd8 Kd8 30.Nf7 Ke7 31.Nh8 1–0. AhmedSultanov (1700) – keremgenc (1655), lichess.org, 2019.

4...Bg2–+ 5.Bf3 Bh1 6.Bh1 c6 7.Qg4 Nf6 8.Qg2 (8.Qh4 d5–+) 8...Bb4 9.c3 Bf8 10.Nf3 g6 11.c4 Bg7 12.Nc3 0–0 13.0–0–0 d5 14.cd5 cd5 15.d4 Nc6 16.Ne5 Ne5 17.de5 Nd7 18.e4 Rc8 19.ed5 ed5 20.Kb1 Ne5 21.Rd5 Qe7 22.Ne4 Nc4 23.Bg7 Kg7 24.Qg5 Qb4 25.Kc1 Ne3 26.Rc5 Rc5 27.Nc5 Qc3 28.Kb1 Qe1 29.Kb2–+ Qf2 30.Kc3 bc5 31.Qe5 Kg8 32.Qc5 Qe1 33.Kb3 Rb8 34.Ka4 Qh1 35.Qe3 Qd1 36.Ka3 Qd6 37.Ka4 Qa6# (37...Qb4#) 0–1. blaugrana18 – lulidrenicaku, kurnik, 2012.

4.Ne2 Nf6

5.a3 Be7 6.Nf4 0–0 7.Be2 Nc6 (7...c5 8.bc5 bc5 9.0–0=+) 8.0–0= d5 9.Nh5 Nh5 10.Bh5 Bf6 11.Bf6 Qf6 12.c3 Ne5 13.f4 (13.d4 Nc4=) 13...Ng6 14.Rf3 Qh4 (14...d4!? 15.Rf2 de3 16.de3 Rad8=+) 15.Rh3 Qf6 16.d4 Rac8 17.Nd2 c5 18.Nf3 cd4 19.cd4 Rc3 20.Qe2? (20.Ne5!? Ne5 21.fe5=) 20...Rfc8 (better 20...Nf4 21.ef4 Rf3–+) 21.Rd1 Ra3 22.Ne5 (22.Ng5 a5=) 22...Rc7 23.Rd3? (23.Bg6 hg6 24.Qb2 Rac3=+) 23...Rac3?? (better 23...Ba6 24.Ra3 Be2 25.Be2 Ne5 26.de5 Qe7–+) 24.Rc3=+ Rc3 25.Nd7? (better 25.Qb2 Rc7 26.Bg6 hg6 27.Qa1–/+) 25...Qe7 26.Ne5 (better 26.Bg6 hg6 27.Qb2–+) 26...Nf8?? (better 26...Rc1 27.Kf2 Ne5 28.fe5 Qb4–+) 27.Bf7+– Kh8 (27...Qf7 28.Nf7 Kf7+–) 28.Qg4 (28.Rh7! Kh7 29.Qh5) 28...Rc1 29.Kf2 Rc2 (29...Rf1 30.Kg3 Qf6 31.Ng6 Qg6 32.Bg6 Ng6 33.Qg6+–) 30.Kf3 Ba6 (30...Qf6 31.Ng6 Qg6 32.Bg6 Rc7 33.Bh7 Nh7+–) 31.Qh4 (31.Rh7! Kh7 32.Qh5) 31...Be2 32.Kg3 h6?? (better 32...Qh4 33.Kh4 Bc4=) 33.Qe7 (33.Qe7 Rc8 34.Rh6 gh6 35.Ng6 Ng6 36.Qf6 Kh7 37.Qg6 Kh8 38.Qh6) 1–0. Akrapovik – Anthony_Wise_1, lichess.org, 2019.

5.Nf4 Bb4 6.Be2 d5 7.a3 (7.Nd3 Bd6–/+) 7...Be7 8.0–0 0–0 9.Bf3 c5 10.c4 Qc7 (10...Bd6–/+) 11.Bf6? (better 11.cd5!? Nd5 12.Bd5 ed5 13.Qg4–/+) 11...Bf6–+ (11...gf6?! 12.cd5 e5 13.Be4+=) 12.Ra2 (better 12.Nc3 dc4 13.Rc1–+) 12...Nc6 Black prepares the advance d4 (12...dc4 13.Bb7 Qb7 14.Nh5–+) 13.Rc2? (13.cd5!? Nd4 14.ed4 Qf4 15.dc5 bc5 16.Rc2–/+) 13...d4 (13...dc4 14.Nc3–+) 14.Re1 (14.Be4 Rad8–+) 14...Rfd8 15.d3 de3 16.fe3 Ne5 (16...Be5 17.Rf2–+) 17.Rd2? (better 17.Bb7!? Qb7 18.Qe2–/+) 17...Nf3–+ 18.gf3 Rd7 19.Ree2? (19.Qe2 Be5 20.Nh3 Rad8–+) 19...Rad8 (better 19...Bf3!? 20.Qf1 Be2 21.Qe2–+) 20.Qf1 (20.Rf2 Qe5 21.Qe2 Qf5–+) 20...Bg5 (20...Be5 21.Nh5 Rd3 22.f4–+) 21.Nh5 (21.Nh3 Bh6–+) 21...Rd3 22.Qg2 (22.f4 Bh4–+) 22...Bh6 (better 22...Qe5!? 23.Qf2 Rb3 24.Rd8 Bd8 25.Nd2 Qh5 26.Nb3–+) 23.Nf6 Kh8 24.Nh5 (24.Ng4 Bg5 25.Qf1 e5–+) 24...f6 (24...g6 25.Qg3 Qg3 26.Ng3 (26.hg3?? Bf3 27.Rd3 Rd3–+) 26...Bf3 27.Rd3 Rd3 28.Re1 Be3 29.Kf1–+) 25.Qg4 (25.Qf2 Rb3 26.Rd8 Qd8–+) 25...Be3 (better 25...f5!? 26.Qg2 Re3 27.Qg3 Qg3 28.hg3–+) 26.Re3 Rd2 27.Nd2 Rd2 28.Nf4 e5 29.Ne6 (29.Rd3 Rd3 (29...ef4?! 30.Rd2 Bc6 31.Qf4=) 30.Nd3 Qc6–+) 29...Qd7 (29...Qf7 30.h3–+) 30.Nf8 (30.Nc5 bc5 31.Qd7 Rd7–+) 30...Qg4 (30...Qf7!? 31.Ne6–+) 31.fg4 Rg2 32.Kh1 (32.Kf1 Rg4 33.Ne6–+) 32...Re2 (32...Rg4 33.Re4 Be4) 33.Kg1–+ Re3 0–1. Akrapovik – DestrucTORamA, lichess.org, 2019.

5.Nf4 Bb4 6.Nh5 Nh5 7.Qh5–/+.

5.Nf4 h6 6.h3 (6.a3 a5 7.b5 Bd6=) 6...g5 (better is 6...Bb4!? 7.Nh5 Nh5 8.Qh5 Bf8–/+) 7.Nd3 h5 8.c4 Nc6 9.b5 Na5 10.Nc3 (better is 10.Ne5=) 10...Nh7?? (10...Nc4!? 11.Qb3 Nb2 12.Nb2 c5–/+) 11.Ne4?? (11.Nd5 Rg8 12.Qh5 ed5 13.Qh7+–) 11...a6?? (better is 11...Rg8 12.Qf3 Nc4=) 12.Bh8 Nf6?? (better is 12...Be4 13.Ne5 Nf6+–) 13.Nf6 Ke7 14.Ng8 Kd6 (14...Ke8 15.Ne5 Bd6+–) 15.Be5# 1–0. nakpim – arbeni99, kurnik, 2012.

5.Ng3 Bb4 6.a3 Bf8 7.d3 g6 8.e4 Bg7 9.Be2 d6 10.0–0 0–0 11.f4 Nh5 12.Bg7 Ng7 13.h4 f5 14.h5 Qh4 15.Kf2 fe4 16.Rh1 Rf4 17.Bf3 Qf6 18.h6 Nf5 19.de4 Ng3 20.Kg3 Qg5 21.Kf2 Be4 22.Nd2 Bf3 23.Nf3 Qf6 24.Kg1 Nd7 25.Rb1 Ne5 26.Nd4 Rf8 27.Rh3 Rd4 28.Qf1 Qf1 29.Rf1 Rf1 30.Kf1 Rf4 31.Kg1 Kf7 32.Rc3 c5 33.Re3 Rh4 34.Re2 Rh6 35.Rd2 Ke7 36.c3 Rh4 37.Ra2 Rc4 38.Rc2 a5 39.Re2 Rc3 40.Re4 h5 41.a4 Rc4 42.Re3 Ra4 43.Rb3 Rb4 44.Rg3 a4 45.Re3 Rb3 46.Re4 b5 47.Kf2 a3 48.Re1 Rb2 49.Ke3 a2 0–1. 56ctx56 – euii88, kurnik, 2012.

5.Ng3 Bb4 6.f3 Be7 7.Be2 0–0 8.0–0 d5 9.f4 c5 10.f5 Nbd7 11.Bh5 e5 12.d3 Qc7 13.Nd2 Rad8 14.Qe1 a6 15.Bf3 d4 16.e4 b5 17.Ba3 a5 18.Rb1 Ba6 19.Bh5 Nh5 20.Nh5 f6 21.Qg3 Rf7 22.Nf3 Nf8 23.Bc1 c4 24.Bh6 g6 25.fg6 hg6 26.Bf8 Bf8 27.Qg6 Bg7 28.Nh4 cd3 29.cd3 Qc2 30.Nf5 Rdd7 31.Nh6 Kf8 32.Nf7 Rf7 33.Ng7 Rg7 34.Qf6 Kg8 35.Qa6 Qg2 0–1. 56ctx56 – jszkodnik, kurnik, 2012.

4.Nf3 a5

5.a3 ab4 6.ab4 Ra1 7.Ba1 Bb4 8.Bg7 f6 9.Bh8 Qe7 10.Qe2 Ba6 11.Qd1 Bf1 12.Rf1 h6 13.c3 Bd6 14.Qb3 Qh7 15.Bf6 Nf6 16.Nd4 Bh2 17.Ne6 de6 18.Qe6 Qe7 19.Qh3 Bd6 20.Qh6 Kd7 21.c4 Nc6 22.Nc3 Ne5 23.Qf6 Qf6 24.Nd5 Qe6 25.Nf4 Qc4 26.Rh1 Qc1 27.Ke2 Qh1 28.g3 Qf3 29.Ke1 Bb4 30.Kf1 Bd2 31.Nh3 Be3 32.Kg1 Qd1 33.Kg2 Qd2 34.Kg1 Bd4 35.Kg2 Ng4 36.Kf3 Nf2 37.Nf2 Qf2 38.Kg4 b5 39.Kg5 Qg2 40.g4 b4 41.Kh6 Qg4 42.Kh7 b3 43.Kh6 b2 44.Kh7 b1Q 45.Kh6 Qh1 0–1. j1a9n55 – black69, kurnik, 2012.

5.a3 ab4 6.ab4 Ra1 7.Ba1 Bf3 8.Qf3 Nc6 9.b5 Nb4 10.Bd3 Qg5 11.Qa8 Ke7 12.Qf3 Nd3 13.cd3 Qb5 14.0–0 Qd3 15.Bc3 Ke8 16.Qa8 Ke7 17.Bb4 d6 18.Qc6 Kd8 19.Nc3 Qd2 20.Nb5 Qb4 21.Qc7 Ke8 22.Qb6 f5 23.Qb8 Kd7 24.Qc7 Ke8 25.Qb7 Ne7 26.Nc7 Kf7 27.Qb4 d5 28.Qb8 Nc6 29.Qb6 Ne7 30.Qe6 1–0. joaquimbage – papawyski, kurnik, 2012.

5.ba5 Ra5 6.Bc3 Ra8 7.Bc4 d5 8.Bb5 Bc6 (8...c6 9.Be2=+) 9.Be2 Nh6 10.0–0 Rg8 (10...Nd7 11.Qc1=) 11.Be5 (11.Bd3 Nf5+=) 11...Be7 12.c4 (12.Nd4 Bd6 13.Bd6 Qd6+=) 12...dc4= 13.Bc4 Bf6 (13...b5 14.Be2=) 14.Nc3 (14.d4 Nf5+=) 14...Na6 (14...Be5!? 15.Ne5 Bg2 16.Nf7 Qf6 17.Kg2 Qg6 (17...Kf7? 18.Be6 Qe6 19.Qf3 Nf5 20.Qa8+–; worse 17...Nf7 18.Qg4+=; worse 17...Qf7 18.Qc2+=) 18.Kh1 Qf7+=) 15.d4+– Bf3 (15...Ng4 16.Bf6 Nf6 17.Ne5+–) 16.Qf3 (worse 16.gf3 Be5 17.Qa4 Kf8 18.de5 Nc5=+) 16...Be5 17.de5 Nc5 18.Qc6 Nd7?? (better 18...Ke7 19.Rfd1 Qb8+–) 19.Bb5 (better 19.Rfd1 Ke7 20.Bb5 Ne5+–) 19...Nf5 (19...Ng4 20.Qe4 c6 21.Bc6 Rc8+–) 20.Ne4 (better 20.Rfd1!? Ne7 21.Qb7 c6 22.Rd7 Qd7 23.Qa8 Qc8 24.Bc6 Kf8+–) 20...Rb8?? (better 20...Ne7 21.Qc4 Ng6+–) 21.Rfd1+– Kf8 (21...Ne7 22.Qd7 Qd7 23.Bd7 Kf8+–) 22.Rd7 Qe8 23.Rad1 (better 23.Qc7 g6 24.Nf6 Rc8 25.Qb6 Rb8 26.Qc5 Kg7 27.Ne8 Rge8+–) 23...g6 24.Nf6 Qc8 25.Rf7! Kf7 26.Rd7 Ne7 27.Ng8 Qg8 28.Qc7 (28.Qf3 Kg7 29.Re7 Qf7 30.Rf7 Kg8 31.Qf6 Rd8 32.Qg7) 28...Re8+– 29.a4 (29.Rd4!? g5 30.Be8 Qe8 31.Qb6 Qc8+–) 29...Qg7 30.a5 (better 30.Qd6 Qf8 31.Bc4+–) 30...g5 (30...ba5 31.Qd6 Qf8+–) 31.ab6 Qg6 (31...Qf8 32.b7 Kg8 33.Qb6+–) 32.Bd3 Qg8 33.b7 Qf8 34.h3 Kg7 (34...h6 35.Be2 Kg6 36.b8Q Rb8 37.Re7 Qe7 38.Qe7 Rb1 39.Kh2 Kf5 40.Bg4 Kg6 41.Qe6 Kg7 42.Qf6 Kg8 43.Be6 Kh7 44.Qf7 Kh8 45.Qg8) 35.Bb5 (better 35.b8Q Kg8 36.Qe8 Qe8 37.Re7 Qe7 38.Qe7 h6 39.Qh7 Kf8 40.Bg6 g4 41.Qf7) 35...Kh6 (35...g4 36.Qd6 g3 37.fg3+–) 36.Rd4 (36.b8Q Rb8 37.Re7 Qg7 38.Rg7 Rf8 39.Rh7 Kg6 40.Bd3 Rf5 41.Qf7) 36...Nd5 (36...Rb8 37.Rd6 Ng6 38.Re6+–) 37.Qc1 (better 37.Rd5 ed5 38.Qc6 Kg7 39.Qe8 Qe8 40.Be8 Kg8 41.b8Q h5 42.Bh5 Kg7 43.Qb7 Kh8 44.Bg6 Kg8 45.Qf7 Kh8 46.Qf8) 37...Rb8 38.Bc6 (38.Rd5!? Rb7 39.Bd3 Qf7+–) 38...Ne7 (38...Qe7 39.h4 Kg7 40.e4+–) 39.Bf3 Nd5 (39...Ng6 40.Qc7 Qe8+–) 40.Qc6 Qc5 (40...Ne7 41.Qe6 Ng6+–) 41.Qe6 Kg7 42.Rd5 Qc1 43.Kh2 Qc7 (43...Qg1 44.Kg1 Rf8 45.Rd7 Kh8 46.Qf6 Rf6 47.b8Q Rf8 48.Qf8) 44.Rd7 Qd7 45.Qd7 Kg6 (45...Kh8 46.Qd6 Re8 47.Qf6 Kg8 48.Bd5 Re6 49.b8Q) 46.Qd6 (46.Be4 Kh5 47.Qh7) 46...Kf5 (46...Kf7 47.Qf6 Ke8 48.Bc6) 47.Qb8 (47.Qf6) 47...h5 (47...Kg6 48.Qd6 Kf7 49.Bd5 Ke8 50.b8Q) 48.Qf8 (48.Qd6 g4 49.Qf6) 48...Ke6 49.Qf6 (49.b8Q g4 50.Qbd6) 49...Kd7 50.Qg5 (50.Qd6 Ke8 51.Bh5) 50...h4 (50...Kc7 51.Qe7 Kb6 52.b8Q Ka5 53.Qa3) 51.Qh5 (51.Qf6 Ke8 52.Bc6) 51...Kc7 52.Qh4 (52.Qe8 Kb6 53.b8Q Kc5 54.Qc6) 52...Kb6 53.b8R Kc5 (53...Ka5 54.Qb4 Ka6 55.Qb6) 54.Qb4 (54.Qd4) 1–0. Dino_Jarach (1805) – Mmesbah (1820), lichess.org, 2019.

5.ba5 Ra5 6.Be2=.

5.c3 ab4 6.cb4 Na6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–) 7.b5 Nc5 8.d4 Ne4 9.Bd3 Ngf6 10.0–0 h5 11.Nbd2 h4 12.Ne4 Ne4 13.Nd2 Ng5 14.Qg4 (14.f4!? Nh7 15.e4+=) 14...f5 15.Qe2 Bd6 16.e4 f4 17.d5 e5 18.Nf3 Qf6 19.Rfc1 h3 20.g3? (better is 20.Ng5 Qg5 21.g3=) 20...fg3–+ 21.Ng5 gh2 22.Kh2 Qg5 23.Rg1 Qf4 24.Kh1 0–0–0 25.a4 g5 26.a5 Bc5 Attacks the backward pawn on f2 27.ab6 Bb6 28.Raf1 Rdg8 29.Bc1 Qh4 30.Rg4 Attacking the backward pawn on g5 30...Qh5 31.Rfg1 h2 32.R1g2= Rh7 33.Bg5 Rf7 34.Be3 Be3?? 35.fe3 Rg4+/– 36.Qg4 Rf1?? 37.Bf1+– Qg4 38.Rg4 c6 39.bc6 dc6 40.dc6 Bc6 41.Kh2 Kc7 42.Bd3 Kb6 43.Rg5 Bd7 44.Re5 Kc6 45.Kg3 Kd6 46.Kf4 1–0. elsh1403 – staryv, kurnik, 2011.

4.Nf3 a6

5.a3 Nf6=.

5.a4 d6 6.c4 Nd7 7.Be2 h6 8.0–0 e5 9.d4 e4 10.Nfd2 d5 11.cd5 Bd5? (better 11...Ngf6!? 12.b5 ab5 13.ab5 Ra1 14.Ba1 Bb4+–) 12.Nc3+– Bb7 13.Nce4 (13.Qb3 Ngf6 14.Bc4 Qe7+–) 13...Be4? (better 13...Bb4 14.Qb3 Qe7+–) 14.Ne4 Bb4 15.Qb3 Be7 (15...Bd6 16.Bc4 Qe7 17.Nd6 cd6 18.e4+–) 16.Bf3 (better 16.Bc4!? Kf8 17.Bf7 Ndf6+–) 16...Ngf6 17.Nf6 Nf6 18.Ba8 Qa8 19.Rac1 0–0 (19...Qb7 20.Qc2 c5 21.dc5 Bc5 22.a5+–) 20.Rc7 Bd6 21.Rc2 Ng4 (21...Qb8 22.g3+–) 22.g3 (22.h3!? Nf6 23.Qb6 Qe4+–) 22...Qe4 23.h3 (23.Rfc1 Qg6+–) 23...Nf6 24.Qb6 (24.d5 Be5+–) 24...Bg3?? (24...Qc2!? 25.Qd6 Qb2 26.Qa6 Qc2=+) 25.fg3 (better 25.Qc6 Bh4 26.Qe4 Ne4+–) 25...Qe3?? (better 25...Qc2 26.Ba3 Re8=) 26.Rff2+– Qg3 (26...Ne4 27.Rce2 Qd3 28.Re4 Qe4 29.Qa6+–) 27.Rg2 Qh3 (27...Qe3 28.Rcf2 Nh5+–) 28.Qf6 Qe3 29.Rcf2 g6 (29...Qf2 30.Kf2 g5 31.d5 Re8 32.Qg7) 30.d5 (30.Rg6 fg6 31.Qg6 Kh8 32.d5 Qd4 33.Bd4 Rf6 34.Bf6) 30...Qe1 (30...Qc1 31.Bc1 Rb8 32.Qf7 Kh8 33.Rg6 Rb2 34.Bb2) 31.Kh2 (31.Kh2 Qc3 32.Bc3 Re8 33.Qf7) 1–0. GuestKVYG – GuestFLDZ, freechess.org, 2017.

5.a4 f6 6.Be2 (6.c3!?=) 6...Bb4–/+ 7.c3 Bf8 (7...Bd6 8.Na3–/+) 8.0–0 Qe7 (8...Nc6 9.c4=+) 9.Ba3 (9.d4 Bd5=+) 9...d6 10.d4 Nd7 (10...Nh6 11.Nbd2=+) 11.Nbd2 (better is 11.a5=+) 11...0–0–0 (11...f5 12.a5=+) 12.Nc4 (12.a5 e5+/–) 12...Kb8 (12...g5 13.Nfd2=+) 13.Ncd2 (13.Rb1 g5=) 13...Nh6 (13...g5 14.Bd3=+) 14.Rb1 (14.a5 b5+=) 14...g5 15.c4 (15.a5 g4 16.Ne1 Rc8=) 15...Bg7 (15...a5 16.Bb2=+) 16.a5 g4 17.Ne1 f5 (< 17...ba5 18.c5 (18.Bg4?! Ng4 19.Qg4 f5+=) 18...Ka7 19.cd6 cd6 20.Nc4+/– (20.Bg4?! Ng4 21.Qg4 Rhg8+=)) 18.f3 (18.ab6 cb6 (< 18...Nb6 19.c5+–) 19.Nd3 Nf7=) 18...gf3 (18...f4!? 19.ab6 cb6 20.ef4 g3=) 19.Bf3= (< 19.Nef3 Ng4 (19...ba5 20.Qb3 Nb6 21.c5+–) 20.ab6 cb6–/+) 19...Qh4 (19...Rhg8 20.Bb7 Kb7 21.Qf3 Ka7 22.Qc6=) 20.Bb7+= Ng4 (better is 20...Kb7 21.Qf3 Kb8 22.ab6 Nb6=) 21.h3?? (better is 21.Nef3 Qh6 22.Ba6 Qe3 23.Kh1 Qa3 24.Ra1=) 21...Ne3–/+ 22.Qf3 Bd4 23.Ba8?? Nc4?? 24.Kh2? d5?? 25.Nc4=+ Ne5 26.Ne5+/– Be5 27.Kh1 Ka8 28.ab6 cb6?? 29.Qf2?? Qa4?? 30.Nd3?? Qa3?? 31.Qb6+– Rb8? 32.Qc6 Ka7 33.Ne5 Rb1 34.Rb1 Rb8 35.Qc7 Ka8 36.Qb8 (36.Rb8) 1–0. tanto (1610) – maf, net–chess.com, 2002.

5.a4 Nf6 6.b5 Bb4=.

5.c4 d6 6.d4 Nd7 7.Be2 g6 8.0–0 Bg7 9.Qb3 Ne7 10.Nbd2 0–0 11.a4 h6 12.Rac1 Rb8 13.Qa3 d5 14.cd5 Nd5 15.Nb1 Qe7 (15...N7f6!?+=) 16.b5+– ab5 (better 16...Qd8 17.ba6 Ba8+–) 17.ab5?? (better 17.Qe7 Ne7 18.Rc7+–) 17...Qa3 18.Ba3 Rfc8 19.Nc3 Ra8 20.Ra1?? (better 20.Nb1=) 20...Nc3–+ 21.Bd3 Ra5 (better 21...Bf3 22.gf3 e5 23.Be4 Ne4 24.fe4 ed4 25.ed4 Bd4 26.Rad1–+) 22.Bb4 Ra1 23.Ra1 Nd5 24.Bd2 Bf8 (24...N5f6!? 25.Kf1–+) 25.Ra7 Rb8 26.Kf1 Kg7 27.Ke2 Bd6 28.e4 Nf4 29.Bf4 Bf4 30.g3 Bd6 31.Nd2 e5 32.d5 Nc5 33.Bc2 Ra8 34.Ra8 Ba8 35.Ke3 Bb7 36.Nc4 Bc8 37.Bd1 Bd7 38.Nd6 cd6 39.Be2 Nb3 0–1. moss42 (1970) – wubbyduk (2045), ChessWorld.net, 2015.

5.Be2 Bb4?? 6.Bg7 Nf6 7.Bh8 +–.

5.Be2 d5 6.0–0 Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–) 7.a3 Rg8 (7...c5 8.b5=) 8.d4+= Nbd7 9.c4 g5 10.Nbd2 g4 11.Ne5 Ne5 (11...dc4 12.Bc4 (worse 12.Ng4 Ng4 13.Bg4 Bg2 14.Kg2 h5=+) 12...b5 13.Nd7 Qd7 14.Bd3+=) 12.de5+– Nd7 13.Qc2 Qg5 (13...Rg5!?+–) 14.cd5+– Bd5 15.e4 (15.Qc7?! Bg7+–; 15.Qh7?! Rg6 16.Rfc1 c6=) 15...0–0–0?? (better 15...Bb7 16.Qc7 Rb8+–) 16.ed5 (16.ed5 g3 17.Ba6 Kb8 18.fg3 Ne5 19.Ne4 Qe3 20.Kh1 Rd5 21.Rae1 Qe1 22.Re1+–) 1–0. Adlai – Toq2364, internet, 2019.

5.Be2 d6 6.c4 Nd7 7.d3 h5 (7...Ngf6 8.0–0=) 8.Nc3 Nh6 9.0–0 Rg8 10.d4 g5 11.d5 g4 12.Nd4 e5 13.Nc6 Bc6 14.dc6 Nf6 15.Qc2 h4 16.f4 gf3 17.Rf3 e4?? (better 17...Nhg4+–) 18.Rf6!+– (18.Ne4?! Ne4 19.Qe4 Qe7 20.Qe7 Be7+–) 18...Qf6 19.Nd5 (19.Ne4?! Qe6 20.Nf6 Kd8 21.Ng8 Qe3 22.Kh1 Ng8+–; 19.Qe4?! Qe6=) 19...Qg5 (19...Qg6 20.Bh5!! Qg2 21.Qg2 Rg2 22.Kg2 Kd8 23.Bf7 Be7+–) 20.Qe4 Kd8 (20...Be7 21.Nc7 Kf8 22.Na8+–) 21.Bf6 Qf6 22.Nf6 (22.Nf6 Be7 23.Qh4+–) 1–0. Janek – Diftt, internet, 2019.

5.Be2 Qe7 6.a3 d6 7.0–0 Nf6 8.Nc3 (8.c4 c5+=) 8...h5 (8...e5 9.Nh4+=) 9.d4 h4 (9...c5 10.dc5 dc5 11.b5+=) 10.h3 g5 (10...Rg8!?+=) 11.Ng5+– Rg8 (11...Bg7 12.Bd3+–) 12.Nf3 Nh7 (12...Ne4 13.Ne4 Be4 14.Bd3+–) 13.Kh1 Nd7 (13...Ng5 14.Ng5 Bg2 15.Kg2 Qg5 16.Bg4+=) 14.Qd3 (14.e4 Ng5 15.Qd3 Bg7+–) 14...Ng5 15.e4 f5 (better 15...Bg7!?+–) 16.ef5+– ef5 (16...e5 17.de5 (17.Nh4?! Qh7=) 17...de5 18.Nd5+–) 17.Qf5 0–0–0 (17...Qf6 18.Qg4+–) 18.Bc4 (18.Nh4?! Nh3 19.d5 Qh4 20.Qh3 Qf6+–) 18...Rg7 19.Rae1 (19.Nh4?! Nh3 20.Nf3 Ng5+–) 19...Qf6 20.Qf6 Nf6 21.Ng5 (21.Nh4 Rh7 22.f4 Nh3 23.Be6 Kb8+–) 21...Rg5 22.Rg1 (22.Be6 Kb8 23.d5 Bg7+–) 22...Nh5 (22...d5 23.Bd3+–) 23.Bc1 (23.Ne4 Rg7 24.Be6 Kb8+–) 23...Rg7 24.Re6 (24.Be6 Kb8+–) 24...Nf4 (24...Rf7 25.Rd6! Rd6 26.Bf7 Ng7+–) 25.Bf4 1–0. Adlai – Scein, corr, 2018.

5.Be2 Qe7 6.c4 Qb4=+ 7.Qb3 (7.Ba3 Qa5 8.Bf8 Kf8=+) 7...Qe7 (7...Nf6 8.Bf6 Qb3 9.ab3 gf6 10.Nc3–/+) 8.0–0 Nc6 9.d4 0–0–0 (9...Nf6 10.Nbd2=+) 10.a4 (10.Nbd2 Nh6=) 10...Na5 (10...Nf6 11.Nbd2=) 11.Qc3= h5 (11...Nf6 12.Nbd2=) 12.Nbd2 (12.c5 Kb8+=) 12...Nf6= 13.c5 (13.Ba3 d6=) 13...Nd5 14.Qc2 (14.Qd3 bc5 15.Rab1 cd4 16.Bd4 Nb4=) 14...Nb4 15.Qc3 Nd5 16.Qc2 h4 (16...bc5 17.Rab1=+) 17.h3 (better is 17.cb6 Nb6 18.Rfc1+/–) 17...g5 (better is 17...bc5 18.Rab1 cd4 19.Bd4 f6=) 18.cb6+/– Nb6 19.Ba3 (19.Rfc1 Na8+/–) 19...d6 20.Ne4 (20.Qc3 g4 21.hg4 Bf3 22.Nf3 Nb7 23.Ba6 Kb8+–) 20...Bg7 (better is 20...g4!? 21.hg4 h3=) 21.Nfg5 f5 22.Nd6 Rd6 23.Bd6 Qd6 24.Nf7 Qd5 25.Bf3 Qd7? 26.Bb7+– Kb7 27.Nh8 Bh8 28.Rfc1 Nac4 29.Rcb1 a5?? 30.Rb5 Kc8 31.g4?? f4?? 32.Qg6 fe3+= 33.Qg8 Kb7 34.Qh8+– ef2 35.Kf2 e5 36.Qf6?? Qd4–+ 37.Kg2?? Qa1 38.Qf3 Ka7 39.Qf7 Ne3 40.Kf3 Nbd5 41.Ra5= Kb6 42.Rb5 Kc6?? 43.Qe6 1–0. gtate (1820) – maf (1615), net–chess.com, 2002.

5.Be2 Nf6

6.a3 d6 7.0–0 Nbd7 8.d3 h6 (8...Be7 9.Nbd2=) 9.c4 (9.Nbd2 Be7=) 9...g5 (9...Be7 10.Nc3=) 10.Nc3 (10.Nbd2 g4 11.Nd4 c5 12.bc5 dc5+=) 10...g4 (10...Rg8 11.Nd4+=) 11.Nd2 (11.Nd4 Rg8+=) 11...Rg8 (11...h5 12.Nce4+=) 12.f4 gf3 (12...Qe7!?+=) 13.Bf3+– Qc8 (13...c6 14.Nce4 Be7 15.Bh5+–) 14.Bb7 Qb7 15.Nce4 Ne4 16.Ne4 (16.de4?! Ne5+=) 16...0–0–0 (16...Bg7!? 17.Qh5 0–0–0 18.Bg7+–) 17.Rf7+– d5 18.cd5 ed5 19.Ng3 Bd6 (19...Qc6 20.Qf3 Kb8 21.Rc1+–) 20.Nf5 Be5? (20...Kb8 21.Nh6 Rgf8+–) 21.Qc2 (better 21.Ne7 Kb8 22.Qc2 Bb2 23.Nc6 (23.Qb2?! Rg5 24.Rc1 Ne5+–) 23...Qc6 24.Qc6 Ba1 25.Rd7 Rd7 26.Qd7+–) 21...Bb2 (21...Kb8 22.Ne7 Bb2 23.Nc6 Kc8 24.Nd8 Rd8 25.Qb2 Qc6+–) 22.Nd6 Kb8 23.Nb7 Kb7 24.Qb2 1–0. Leonco – Ixxy, internet corr, 2018.

4.Nf3 Na6

5.a3 Nf6+=.

5.a3+= c5

6.b5 Nc7 7.c4 f5 8.d4 Nf6 9.dc5 (9.Be2 Be7=) 9...Bc5 10.Be2 0–0 11.0–0 d6 12.Nd4 (12.Nc3 a6=) 12...Ne4 (13.f3 Nf6=) =. Hilton,Stephen – Kucharkowski,Jens, Orang Utan Invitational, 2002.

6.b5 Nc7 7.c4 Nf6= 8.Nc3 d5 9.d4 dc4 10.dc5 Bc5 11.Bc4 Qe7 12.0–0 0–0 13.Qe2 a6 14.a4 ab5 15.Nb5 Ncd5 16.Rfd1 Ne4 17.Nfd4 Qh4 18.Bd3 Nb4 19.Nf3 Qh6 20.Bc4 Rfc8 21.Bd4 Nd5 22.Qb2 Ndf6 23.Ne5 Bd4 24.Rd4 Bd5 25.Rc1 Qh5 26.Bd5+= Rc1 27.Qc1 ed5 28.Qc6 Rf8 29.Nf3 Qg6 30.Kf1 Nc5 31.Ne1 Qh5 32.h3 Nb3 33.Rd3 Nc5 34.Rd4 Nb3 ½–½. Luehrig,Walter – Kucharkowski,Jens, Orang–Utan Invitational, 2002.

6.b5 Nc7 7.c4 Nf6= 8.d4 cd4 9.Bd4 Bc5=.

6.b5 Nc7 7.c4 Nf6= 8.Be2 d5 9.0–0 Bd6 10.d3 0–0 11.Nbd2 Qe7 12.a4 Rfd8 13.a5 e5 14.cd5 Nd7 15.e4 Nb5 16.Nc4 Nd4 17.Nd6 Qd6 18.Nd4 ed4 19.f4 Rab8 20.ab6 ab6 21.Ra7 b5 22.Bg4 Nb6 23.Ra5 Bd5 24.ed5+= Nd5 25.Bc1 Qb6 26.Ra1 c4 27.Qe2 Re8= 28.Qf3 Ne3 29.Re1 c3 30.Be3 Re3 31.Qd5 b4 32.Qb3 h6 33.Bf5 g6 34.Bg4 Rd3 35.Re7 Rf8 36.Raa7 Qf6 37.Qc4 Re3 38.Re3+/– de3 39.Ra6 Qg7 40.Bd1 Re8 41.Kf1 Rd8 42.Bb3 Kh7 43.g3 Qf8 44.Ra7+/– Kh8 45.Rf7 Qd6 46.Kg2 Qd2? 47.Kf3 e2 48.Qe6 Qd6 49.Qe2+– Qd3 50.Qd3 Rd3 51.Kg4 Rd2 52.Rb7 Rb2 53.Bd5 c2 54.Rc7 b3 55.f5 gf5 56.Kf5 c1R 57.Rc1 Rc2 58.Rb1 b2 59.h4 Kg7 60.Bf3 Rc3 61.Ke4 Rb3 62.g4 Rb4 63.Kd5 h5 64.gh5 Kh6 65.Kc5 ½–½. Moedl,Willi – Kucharkowski,Jens, CO1–01 b2–b4.com, 2002.

6.b5 Nc7 7.Be2 a6+=.

6.b5 Nc7 7.Be2 d5=.

6.b5 Nc7 7.Be2 f5 8.Ne5 Nf6 9.c4 Bg2= 10.Rg1 Bb7 11.Bf3 Bf3 12.Qf3 g6 13.Qg2 Rg8 14.d3 Bg7 15.h3 d5 16.Nd2 Nh5 17.f4 a6 18.a4 Nf6 19.Ke2 Qd6 20.Ndf3 Nd7 21.Rgb1 a5 22.Rg1 Rf8 23.Qg5 Bf6 24.Qh6= Be5 25.Be5 Ne5 26.Ne5 Qe7 27.Rg6? hg6–+ 28.Qg6 Rf7 29.Rg1 dc4 30.dc4 Qf8 31.h4?? Qe7?? 32.Qh5 0–0–0 33.Nf7 Rf8 34.Ne5 Rd8 35.Nc6 Qe8 36.Qe8 Re8 37.h5 Rh8 38.Rg6 (38...Kd7 39.Rg7 Kc8 40.h6+–) 1–0. Nemec,Zdenek – Kucharkowski,Jens, CO1–01 b2–b4.com, 2003.

6.b5 Nc7 7.Be2 Nf6+=.

5.b5 Nc5

6.Nc3 f5 7.Be2+= Nf6 8.0–0 Bd6 9.d4 Nce4 10.Ne4 fe4 11.Ne5 0–0 12.c3 a6 13.a4 Qe8 14.Qb3 Be7 15.h3 Kh8 16.a5 ba5 17.Ra5 ab5 18.Ra8 Ba8 19.Bb5 c6 20.Be2 d6 21.Ng4 Qf7 22.Nf6 Bf6 23.Ba3 Rd8 24.Bg4+= d5 25.Bc5 e5 26.Ra1 Qe8 27.Qb6 h5 28.Be2+/– h4 29.Qa7 ed4 30.cd4 Kh7 31.Bg4 Qg6 32.Qc7 Qe8 33.Ra7 Kh8 34.Bd6 (34...Qg6 35.Be6+/–) 1–0. Pleschke,Helmut – Kucharkowski,Jens, Orang–Utan Invitational, 2001.

6.Nc3 Nf6 7.d4 Nce4 8.Ne4 Ne4 9.a3=.

6.c4 a6 7.Be2=.

6.c4 f5 7.Be2 Nf6 8.0–0+= Bd6 9.d4 Nce4 10.Nbd2 Ng4 11.h3 h5 12.Ne4 Be4 13.d5 Qe7 14.Ne5?? Qg5?? 15.Ng4?? hg4–/+ 16.Bg4? fg4–+ 17.Qg4 Qg4 (18.hg4 Bh2 19.Kh1 Be5 20.Kg1 Bb2–+) 0–1. Zimmer,Georg – Kucharkowski,Jens, corr SOK–93–93, 1993.

6.c4 Nf6 7.d4 Nce4 8.a3? (8.Nc3 a6 9.Bd3 ab5 10.cb5 Nc3 11.Bc3 Ne4 12.Be4 Be4+=) 8...Nd6?? (better is 8...Ng4 9.Qc2 Ngf2–+) 9.Nc3 Be7 10.Bd3 0–0 11.0–0 Nde4 12.Ne4 Ne4 13.Qc2 f5 14.Ne5 Nf6 15.Nf3 Bf3= 16.gf3 Qc8 17.Kh1 Qb7 18.e4 fe4 19.fe4 Nh5 20.Rg1 Nf4 21.d5 Nd3?? 22.Rg7+– Kh8 23.Qd3 Bf6 24.Bf6 Rf6 25.Rd7 Rg8 26.Qh3 h6 27.Rg1 Qc8 28.de6 Rg1 29.Kg1 Qg8 30.Kf1 Re6 31.Qc3 Qg7 (31...Re5 32.Qe5 Qg7 33.Qg7#) 1–0. olawoj – bulgar74, kurnik, 2012.

6.d4 Na4 7.Ba3 Ba3 8.Na3=.

6.d4 Na4 7.Bc1 Bb4 8.Bd2 Bd2 9.Nfd2=.

6.Be2 Na4. Kucharkowski.

6.Be2 Nf6=.

6.d4 Ne4

7.Bd3 f5 8.0–0 a6 9.ba6 Ba6 10.c4=.

7.Bd3 f5 8.0–0+= Ngf6 9.Ne5 Be7 10.a4 a5 11.c4 0–0= 12.Bc2 d6 13.Nd3 Qd7 14.f3 Ng5 15.Nd2 Nf7 16.Qe2 c6 17.e4 fe4 18.fe4 e5 19.de5+= de5 20.Nf3 Qg4 21.Nde5 Ne5= 22.Be5 Rae8 23.Bd4 Nh5? 24.Qe3 c5 25.Be5 Bf6= 26.h3 Qg6 27.Bf6 Nf6 28.Nh4 Qh5=+ 29.Nf5 Be4 30.Be4 Ne4 31.Qf4 Rf6 32.Rae1 Rfe6 33.Rd1 Nf6 34.Qc7 Qg5 35.Rf3 h5?? 36.Qg3?? Qg3= 37.Rg3 Re1 38.Re1 Re1 39.Kh2 Ne8 40.Rg6 Rf1 41.g4 hg4 42.hg4 Nf6 43.Rg7 Kf8 44.Rg6 Ng4 45.Kg3 Ne5 46.Rf6 Nf7 47.Kg4 Ra1 48.Ne3 Ra4 49.Kf4 Ke8 50.Rb6 Ra2 51.Ke4 Rd2 52.Nf5 Kd7 53.Rb7+/– Ke6 54.Rc7 Re2 55.Kf3 Re5= 56.Ne3 Ng5 57.Ke2 a4 58.b6 Kd6 59.Kd3 Nf3 60.Rc8 Ne1 61.Ke2 Nc2 62.b7 Re3 63.Kd2 Rb3 64.b8Q Rb8 65.Rb8 Nb4 66.Ra8 Ke5 67.Kc3 Nc6 68.Ra4 Ke6 1–0. Hemzo,Miguel Angelo – Kucharkowski,Jens, Orang–Utan Invitational, 2001.

7.Bd3 f5 8.0–0 Ngf6 9.Ne5+= Be7 10.f3 Nd6 11.Qe2+=.

7.Bd3 f5 8.0–0 Ngf6 9.Ne5+= Be7 10.f3 Ng5 11.c4 0–0 12.a4 a6 13.Nc3 Qe8 14.ba6+= Ba6 15.Nb5 Qc8 16.Qe1 c6 17.Ba3 Ba3 18.Na3 d6 19.h4 Nf7 20.Nf7 Rf7 21.Qb4 Qc7 22.Nc2 c5 23.Qd2 e5 24.a5= e4 25.Be2 ba5=+ 26.Qa5 Qc6 27.Rfb1 Rb7 28.Rb7 Bb7 29.Qe1 Qb6 30.Rb1 Qc7 31.d5 Bc8 32.Ra1 Ra1 33.Qa1 Qb7 34.f4 Bd7 35.Qa2 Be8 36.Bd1 Bh5 37.Bh5 Nh5 38.Na3 Qa6 39.Qb3 Nf6 40.Nc2 h6 41.Kf2 Ng4 42.Ke2 Kh7=+ 43.Na3 Qa5 44.Nb5 Qa1 45.Nd6= Qg1 46.Nf5 Qg2 47.Kd1 Nf2–/+ 48.Kd2 Nd3 49.Kc3 Qf1?? 50.Qa3?? Qe1 51.Kc2 Nb4 52.Kb3 Qd1 53.Kb2 Qc2 54.Ka1 Qc4 (55.Kb2 Nd3 (55...Nd5?! 56.Qb3 Qe2 57.Kc1–+) 56.Ka1 Qd5–+) 0–1. Van Rooijen,Peter – Kucharkowski,Jens, Orang–Utan Invitational, 2002.

7.Bd3 Ngf6 8.0–0=.

4.Nf3 Bb4??

5.Bg7+– Nc6 6.Bh8 Qe7 (7.a3 Ba5+–). ludger – debutler (2120), net–chess.com, 2005.

5.Bg7+– Nc6 6.Bh8 f6 7.Nh4 (7.a3 Bc5+–) 7...Qe7 8.Qh5 Qf7 (8...Kd8 9.a3 Bc5 10.d4+–) 9.Qf7 Kf7 10.Bd3 Nge7 11.Bf6 (11.a3!? Bc5 12.Bf6 Kf6+–) 11...Kf6 12.Be4 (12.a3!? Bc5+–) 12...d5 13.Bf3 (13.Bd3 h6+–) 13...Ne5 14.Be2 Rg8 15.c3 Bd6 16.d4 Nf7 17.Nd2 (17.Bd3 h6+–) 17...Ng6 (17...e5 18.Ndf3+–) 18.Ng6 hg6 19.0–0 (19.f4 c5+–) 19...Rh8 20.h3 (20.f4 c5+–) 20...e5 21.f3 (21.f4 ef4 22.ef4 Rh4+–) 21...c5 22.Rad1 g5 23.Nb3 c4 (23...ed4 24.ed4 c4 25.Nd2+–) 24.de5 Ne5 (24...Ke5 25.Nd4+–) 25.Nd4 a6 26.f4 gf4 27.Rf4 (27.ef4 Ng6 28.f5 Ne5+–) 27...Ke7 28.Nf5 Ke6 29.Nd6 Kd6 30.Bc4 Nc4 31.Rc4 b5 (31...Ke5 32.Rcd4+–) 32.Rcd4 Kc5 (32...Ke5 33.Kf2+–) 33.Rf1 Re8 34.Rf7 Kb6 (34...Bc8 35.g4+–) 35.Kf2 Rc8 36.Rd3 b4 (36...Rc7 37.Rc7 Kc7 38.g4+–) 37.cb4 Rc2 38.Kg3 (38.Kf3 Ra2 39.g4 Rh2+–) 38...Ra2 39.Rf2 (39.h4 Rb2 40.Rd4 a5 41.ba5 Ka5+–) 39...Ra1 40.Rb3 (40.Rd4 Rc1+–) 40...Rc1 (40...Kb5 41.Kf4+–) 41.h4 Rc8 (41...Kc6 42.Rf6 Kb5 43.h5+–) 42.h5 Rg8 (42...Rh8 43.Rf6 Kb5 44.h6+–) 43.Kh4 d4 44.g4 (44.ed4 Rg2 45.Rg2 Bg2+–) 44...de3 (44...Bd5 45.Rd3 de3 46.Rf6 Kc7 47.Rd5+–) 45.Re3 Bc8 (45...Kb5 46.Rd2+–) 46.g5 Rd8 (46...Kb5 47.Rf4+–) 47.Rf4 Rd1 48.g6 Rh1 (48...Rg1 49.Rg3 Rh1 50.Kg5+–) 49.Kg5 Rg1 50.Kf6 Bg4 (50...Rh1 51.g7 Rg1 52.h6+–) 51.h6 Bh5 52.Re6 Kc7 53.g7 (53.Rc4 Kd7 54.Rd4 Kc7 55.Re7 Kc6+–) 53...Rg6 54.Ke7 1–0. Ruuhila,Risto – Byysing,Veikko, Helsinki op2, 1994.

5.Bg7+– Nc6 6.Bh8 Nf6 7.a3 Bc5 8.d4 +–.

5.Bg7+– Bf3 6.Qf3 d5 +–.

5.Bg7+– f6 6.Bh8 Qe7 7.a3 Bd6 8.d4 h6 9.Qd3 Nc6 (9...Qf7 10.Nbd2+–) 10.Nbd2 (10.Nc3 a6+–) 10...0–0–0 (10...f5 11.Nc4+–) 11.Qg6 (11.Ne4 f5 12.Nd6 Qd6+–) 11...Kb8 (11...Ba3 12.Bg7+–) 12.Nc4 Ba6 (12...f5 13.d5! Na5 14.Na5 ba5 15.de6 Qe6 16.Qe6 de6 17.Bc4+–) 13.Nfd2 (13.Nd6 Bf1 14.Ne4 f5+–) 13...Bc4 14.Nc4 e5 (14...f5 15.d5! ed5 16.Nd6 cd6 17.Be2+–) 15.d5 Na5 16.Na5 ba5 17.Bd3 (better 17.Ba6 Ka8+–) 17...c5 (17...Ka8 18.0–0+–) 18.Rb1 (18.dc6 dc6 19.Rb1 Ka8+–) 18...Ka8 19.0–0 e4 (19...Rf8 20.e4+–) 20.Be4 Qe5 21.f4 Qc3 (21...Qe7+–) 22.Rb3 Qd2 23.Bf6 Nf6 24.Qf6 Rg8 (24...Re8 25.Qd6 Qc2 26.Qd7 Qb3 27.Qe8 Kb7 28.d6 Ka6 29.Qc6 Qb6 30.Bd3 c4 31.Bc4) 25.Qd6 Qg2 (25...Rg2 26.Bg2 Qe3 27.Re3 c4 28.Re8 Kb7 29.Rb1) 26.Bg2 Rg2 (26...Rc8 27.Qd7 Rb8 28.d6 Rb7 29.Qb7) 27.Kg2 (27.Kg2 c4 28.Rb8) 1–0. Intruder – gobyandras, internet free game, 2018.

5.Bg7+– f6 6.Bh8 Qe7 7.Bf6! Qf6 (7...Qf6 8.Nd4 Combination; 7...Nf6 8.Nc3 Combination) 8.c3 Bd6 (8...Nc6 9.d4 (9.cb4?! Qa1 10.b5 Ne5+=) 9...Ba5 10.Qd3+–) 9.d4 Nc6 10.Nbd2 Be7 11.Bb5 Nd8? (11...0–0–0 12.0–0+–) 12.0–0 (12.Ne5 c6 13.Qh5 Nf7 14.Qh7 Ne5 15.de5 Qf7 16.Qf7 Kf7+–) 12...Nf7 13.e4 (13.Qa4 c6 14.Bd3 Qg7+–) 13...Ng5 (13...Qg6 14.e5+–) 14.Ng5 (14.Ne5!? 0–0–0+–) 14...Qg5 15.f4?? (better is 15.Qe2+–) 15...Qb5+= 16.f5 (better is 16.a4!? Qd3 17.Rf3+=) 16...0–0–0–/+ 17.c4 (17.fe6 de6 18.Qg4 Qc6–/+) 17...Qb4 (17...Qb2 18.Nf3 Be4 19.fe6 de6 20.Qb3 Qb3 21.ab3–+) 18.Nb3 (better is 18.Qe2–+) 18...Qa5?? (better is 18...Be4 19.fe6 Qc4 (19...de6?! 20.Qe2 Bf5 21.g4–+) 20.ed7 Rd7–+) 19.Qd3 (better is 19.Na5 ba5 20.fe6 de6+–) 19...Nf6?? (better is 19...Qa4+=) 20.e5 (better is 20.Na5 Be4 21.Qe3 ef5 22.Rf5 Bf5 23.Qe7 Ng8+–) 20...Ne4 (20...Qa3 21.ef6 Bf6 22.fe6 Qf8 23.ed7 Rd7+–) 21.a3 (better is 21.Na5 ba5 22.f6+–) 21...Qa4–/+ 22.d5? (better is 22.f6 Bf8 23.Rae1–/+) 22...ed5–+ 23.cd5 Ba6 24.Qd4?? (24.Qe3 Bg5 25.Qf3–+) 24...Qd4 (better is 24...Bc5 25.Qc5 bc5–+) 25.Nd4 Bc5 26.Rfd1 (26.Rad1 Nc3 27.Rfe1 Nd1 28.Rd1 Re8–+) 26...Bc4 (better is 26...Be2! 27.g4 Bd1 28.Rd1 Nc3–+) 27.h3 (27.Rac1 Bd5 28.Rc5 Nc5–+) 27...Bd5 (better is 27...Re8!? 28.Kh2 Re5 29.Rac1 Bd5 30.Rc2–+) 28.Kh2 Rg8 29.Nb5 (29.g4 c6 30.Ne2 Nf2–+) 29...Bb7 (29...c6!? 30.Na7 Kb7 31.Nb5–+) 30.Na7 Kd8 31.Nb5 (31.Rd3 Nd6! 32.g4 Nf5–+) 31...Nf2 (better is 31...Nc3! 32.g4 (32.Nc3?? Rg2 33.Kh1 Rd2 34.Nd5 Bd5) 32...Nb5 33.Rac1–+) 32.Rg1 (32.g4 Nd1 33.Rd1 Bf3–+) 32...Nd3 33.e6 (33.g4 Ne5 34.Rgd1 h5–+) 33...c6 (better is 33...de6 34.fe6 Rg6–+) 34.Rad1 Ne5?? (better is 34...Bg1 35.Kg1 Nc5–+) 35.Nd6+= Ba8?? (better is 35...Bg1 36.Kg1 de6 37.fe6 Ke7 38.Nb7 Ra8+=) 36.Nf7+/– Nf7 (36...Ke7 37.Ne5 Bg1 38.Kg1 de6 39.Rd7 Kf6 40.Ng4 Kg5 41.f6+/–) 37.Rd7+– Kc8 38.Rf7 (38.ef7 Rf8 39.Rgd1 h6+–) 38...Bg1+= 39.Kg1 c5 40.Rd7?? (40.f6!? Bd5 41.Re7 Rg2 42.Kf1+=) 40...Bc6 (better is 40...Bg2!? 41.Kf2 Bh3–+) 41.Rd2 Be4 (41...Rf8 42.e7 Rf5 43.Rd8 Kc7 44.e8Q Be8 45.Re8–/+) 42.Rf2 (42.f6 Bg6+=) 42...Re8 (better is 42...Bd5 43.Rd2 Bc4=) 43.f6+/– Kd8?? (better is 43...Bg6 44.f7 Bf7 45.ef7 Rf8+/–) 44.Rd2+– Kc8 45.Rd6 (better is 45.f7 Bg6 46.fe8Q Be8 47.Kf2+–) 45...Bg6+/– 46.Rb6?? (better is 46.f7 Bf7 47.ef7+–) 46...Kc7–/+ 47.Ra6 c4 48.Kf1?? (better is 48.Ra4 c3 49.Rc4 Kd6 50.Rc3 Ke6 51.Rf3–/+) 48...c3–+ 49.Ke1 (49.Ra5 c2 50.Rc5 Kd6–+) 49...Rb8 (49...c2 50.Kf2 c1Q 51.f7 Qf4 52.Kg1 Qd4 53.Kh1 Bf7 54.e7 Re7 55.Rh6 Re1 56.Kh2 Qf4 57.g3 Qd2) 50.Ra7 (50.Ra4 c2 51.Rc4 Kd6–+) 50...Kd6 (50...Kc6 51.Ra6 Kd5 52.f7–+) 51.Ra6 (51.f7 c2 52.Kd2 Ke6 53.Rc7–+) 51...Kc7 (better is 51...Kd5 52.Ra5 Ke6 53.Rc5 Rb1 54.Kf2–+) 52.Ra7 Kd6 (better is 52...Kc6 53.Ra4 c2 54.Rc4 Kd5–+) 53.Ra6 Ke5 (53...Kd5 54.Ra7 Rb1 55.Kf2 c2–+) 54.Rc6 (54.f7 c2 55.Rc6 c1Q 56.Rc1 Ke6–+) 54...c2 (better is 54...Kf6 55.Rc3 Rb2–+) 55.Kd2?? (better is 55.f7–/+) 55...Kf6–+ 56.g4 (56.Rc2 Bc2 57.Kc2–+) 56...Rd8 57.Ke3 (57.Kc1 Rd1 58.Kb2 Rb1 59.Ka2 c1Q 60.Rc1 Rc1–+) 57...Rd1 58.g5 (58.h4 c1Q 59.Rc1 Rc1–+) 58...Ke7 0–1. Melzig,Ernst – Polifka,Wilfried, 2rd Berlin Germany, Senior Championship, 2010.

5.Bg7+– f6 6.Bh8 Qe7 7.Nh4 Nc6 8.Qh5 Qf7 9.Be2 Ne5 10.0–0 0–0–0 11.f4 (11.a3 Be7+–) 11...Ng6 (11...Qh5 12.Bh5 Nc4 13.c3+–) 12.Ng6 hg6 13.Qh4 Be7 14.Qh3 Be4 (14...Bd6 15.Bd3+–) 15.Nc3 Bc2 (15...Bb7 16.Rab1+–) 16.Rfc1 Bf5 17.g4 Bb4 (17...Qf8 18.gf5 Nh6 19.fe6 Qh8 20.ed7 Kb8 21.Qe6+–) 18.gf5 gf5 19.Nb5 c6 20.Rab1 Be7 21.Na7 Kb7 22.e4 (better 22.Bh5 Qf8 23.Qg2 Bc5+–) 22...Ka7 23.Qb3 Bc5 (23...Bb4 24.Qa4 Kb8 25.Rb4 Qg6 26.Kf2 Qg5 27.Rb6 Kc8 28.Rcc6 dc6 29.Qc6) 24.Rc5! Qg6 (24...bc5 25.Qa3 The nicest combinations are those leading to mate) 25.Kh1 Nh6 (25...Qg2 26.Kg2 b5 27.Rb5 cb5 28.Qb5 fe4 29.Qa4) 26.Qb6 (26.Qb6 Ka8 27.Qb7) 1–0. GuestGPPJ – GuestLLKB, freechess.org, 2020.

5.Bg7+– f6 6.Bh8 Nh6 7.c3 Bd6 8.Bd3 (8.Qc2 Qe7+–) 8...Kf7 (8...Kf8 9.Qc2+–) 9.Bf6 (better is 9.Ng5! Kg8 10.Qh5+–) 9...Qf6 10.Bh7 Bf3 (10...Kg7 11.Bc2+–) 11.Qf3 Qf3 12.gf3 Na6 13.d4 e5 14.e4 (better is 14.Bd3 Nb8 15.Nd2+–) 14...ed4 15.cd4 Bb4 16.Ke2 Rh8 17.Bf5 Nf5 18.ef5 Kf6 19.Nd2 Bc3?? (19...d5 20.Nf1 c5 21.Rd1+–) 20.Rac1 Bd2 21.Kd2+– c6 22.Rce1 Rh5 23.Re5 Nc7 24.Kd3 Nd5 25.Ke4 Nc3 26.Kd3 Na2 27.Ra1 Nb4+= 28.Kc4 Nc2 29.Ra7 Rh2?? 30.Rd7 Rf2 31.Rd6 Kf7 32.Rc6 Rf3 33.Rb6 Ne3 34.Kc5 Nf5 35.d5 Ne7 36.Rb7 Rc3 37.Kd6 Kf6 38.Rbe7 Rd3 39.R7e6 Kf7 40.Rf5 Kg7 41.Re4 Rg3 42.Ke6 Kg6 43.d6 Rd3 44.d7 Rd2 45.Rg4 Kh6 (46.Rf1 Rh2 47.d8Q Re2 48.Kf7 Rf2 49.Rf2 Kh7 50.Rh2) 1–0. revbodio2 – grigoropoulo2, Live Game Caissa's Web, 2004.

5.Bg7+– Bf8 6.Bh8 d6 7.Nc3 +–.

5.Bg7+– Bf8 6.Bh8 f6 7.Nc3 (better is 7.Ng5! h6 8.Qh5 Ke7 9.Qf7 Kd6 10.Ne6 de6 11.Qg8 c6+–) 7...Qe7 (7...Nh6 8.Nd4 Kf7 9.Bd3+–) 8.Bc4 (8.d4 d5+–) 8...Nc6 (8...Nh6 9.Nd4 Kf7 10.Nd5 Bd5 11.Bd5+–) 9.Qe2 (9.0–0 Nh6 10.Ne4 Ng4+–) 9...Na5 (9...Nb4 10.Bb3+–) 10.Bb3 Nb3 11.ab3 Qf7 12.Nb5 Kd8 13.Qc4 c6 14.Nbd4 Ne7 15.0–0 Ng6 16.Bf6 Qf6 17.h3 c5 18.Nb5 Ne5? 19.Ne5+– Qe5 20.Qf4 Qf4+/– 21.ef4 a6 22.Nc3 Bg7 23.g3 Bc3 24.dc3+– Ke7 25.Rfd1 d5 26.c4 Rd8 27.cd5 ed5 28.Re1 Kf6 29.Re5 d4 30.Rae1 Rd6? 31.Re7 Bc6?? 32.Rh7 Kg6 33.Ree7 Kf6 34.Ref7 Kg6 35.Rfg7 Kf6+– 36.Rh6 Kg7 37.Rd6 Bb7 38.Rb6 Bf3 39.Ra6 c4 40.bc4 Be2 41.g4 d3 42.cd3 Bd3 43.Rc6 Kf7 44.c5 Ke7 45.Rd6 Bc4 46.Rd4 Bb5 (47.h4 Ba6+–). revbodio – GRIGOROPOULOS46, Live Game Caissa's Web, 2005.

5.Bg7+– h6 6.Bh8 a6 7.Bc4 +–.

5.Bg7+– h6 6.Bh8 f6 7.a3 (7.Nd4 Qe7 8.Nb5 Bd6 9.Nd6 cd6 10.Qh5 Qf7+–) 7...Bd6 8.d4 Ne7 (8...Qe7 9.Qd3 f5+–) 9.Ne5! fe5 (9...Be5 10.Qh5) 10.Qh5 Kf8 11.Qh6 Kf7 12.Qh7 (better is 12.Qf6 Ke8 13.Bg7 Bb4 14.ab4+–) 12...Kf8 (12...Ke8 13.Be2 Bb4 14.ab4 d6 15.de5 a5+–) 13.Bg7 Kf7 (13...Ke8 14.Qh5 Ng6 15.Qg6 Ke7 16.Bf6 Kf8 17.Qg7 Ke8 18.Qg8 Bf8 19.Qg6#) 14.Bh6 Kf6 15.Qg7 Kf5 16.Bd3 e4 17.g4# 1–0. pierre – jordan2delta, ChessHere.com, 2006.

4.Nf3 c5

5.bc5 Bc5?? 6.Bg7+– Be7 7.Bh8 Bf6 8.Bf6 Qf6 9.Nc3 Bf3 10.Qf3 Qf3 11.gf3 Nc6 12.f4 Nf6 13.Bg2 Nb4 (13...Ke7+–) 14.Ba8 Nc2 15.Ke2 Na1 16.Ra1 Ng4 17.h3 Nf6 18.Rc1 d5 19.d4 Nd7 20.Bc6 Ke7 21.Bd7 Kd7 1–0. chevin – chessnirvana, Live Game Caissa's Web, 2004.

5.bc5 bc5

6.Na3 Nc6=.

6.Nc3 Nf6+=.

6.c4 Nc6 7.Be2 d6 8.0–0 Nf6 9.d4 Be7 10.Nc3 cd4 11.ed4 a6 12.Rc1 (12.d5 ed5 13.Nd5 0–0+/–) 12...0–0= 13.a4 Rc8 14.Bd3 (14.Rb1 Re8=) 14...Na5 (14...Nb4 15.d5+=) 15.Qe2 (better is 15.Nd2!?=) 15...Bf3–/+ 16.gf3 Qb6 (16...Nb3 17.Rcd1–/+) 17.Ne4 White intends c5 (17.d5 Nb3 18.Rb1 Nc5=) 17...d5 (17...Nb3!? 18.Rb1 Nd4+=) 18.c5= Qc7 19.Nf6 (worse is 19.Ba6 de4 20.fe4 Ra8–/+) 19...Bf6 20.Ba6 Ra8 21.Bb5 Qf4 22.Qe3 Qh4 23.f4 Bd8 24.Rc2 Bc7 Exerts pressure on the isolated pawn 25.Bc1 g5? 26.Qg3+– Qg3 27.fg3 gf4 28.Bf4 Bf4 29.Rf4 f5 30.Re2 Rf6 31.Rf3 Kf7 32.Rfe3 Rg8 33.Rc2 f4 34.Rf3 fg3 35.Rg3 Rg3 36.hg3 Nb3 37.c6 Ke7 38.c7 Rf8 39.c8Q Rc8 40.Rc8 Nd4 41.Rc7 Kd6 42.Rh7 Kc5 43.Rh6 e5 44.Rh5 e4 45.Kf2 Nb3 46.g4 Nd4 47.g5 Nb5 48.ab5 Kb5 49.g6 Kc4 50.g7 d4 51.g8Q Kc3 52.Rh3 d3 53.Qc8 Kd4 54.Rh4 Ke5 55.Qe8 Kd5 56.Qe4 Kc5 (56...Kc5 57.Rh5 Kd6 58.Qg6 Kd7 59.Rh7 Kd8 60.Qg8; 56...Kd6 57.Rh6 Kc5 58.Rc6 Kb5 59.Qc4 Ka5 60.Ra6). futsalboy (1665) – faton93 (1700), kurnik, 2011.

6.c4 d5 7.Qa4 Bc6 8.Qc2 Nf6 9.Be2 Bd6 10.0–0 Nbd7 11.d4 cd4 12.Nd4 Bb7 (12...Rc8 13.Nd2=) 13.Nc3 (13.cd5 Rc8 14.Qa4 Bd5+=) 13...dc4= 14.Bc4 (14.Ncb5 Ne5=) 14...0–0 (14...Bh2 15.Kh2 Qc7 16.Kg1 Qc4 17.Rab1+=) 15.Be6 (better is 15.Ndb5!? Bc5 16.Rfd1=) 15...fe6+= 16.Ne6 Qe7 (16...Qb8 17.Nf8 Bh2 18.Kh1 Kf8 19.Rab1+=) 17.Nf8 Rf8 (17...Qe5 18.g3 Kf8 19.Rfd1=) 18.Nb5 (better is 18.Qb3!? Kh8 19.Qb7+/–) 18...Bb8 19.Qb3 Kh8 (better is 19...Bd5 20.Qa3 Qe4–/+) 20.Na7? (20.Qa3 Nc5 21.Rac1 Nfd7+=) 20...Bg2 21.Kg2+= Ba7 22.Ba3 Bc5 23.Bc5 Qc5 24.Qb7 Qg5 25.Kh1 Nc5 26.Qg2 Qe5 27.a4 g6 28.a5 Nfe4 29.a6= Ra8 30.a7 Qc7 31.f3 Nf6 32.Qb2 Ncd7 33.Rfc1 Qd8 34.Qb7 Qf8? 35.Rc7 Qd8 36.Rd1 Qf8 37.Rdd7 Ra7 38.Rh7 Nh7 39.Rh7 Kg8 40.Qa7 Qf3 41.Kg1 Qd1 42.Kf2 Qd2 43.Kg3 Qe1 44.Kf4 (44.Kf4 Qf2 45.Ke5 Qf5 46.Kd4 Qf6 47.Kd5 Qf5 48.Kc4 Qc2 49.Kd4 Qb2 50.Kd5 Qb5 51.Kd6 Qd3 52.Ke7+–) 1–0. carocan (1625) – markoni (1730), kurnik, 2012.

6.c4 d5 7.Be2 dc4 8.Bc4 Nd7 9.0–0 Ngf6 10.d4 cd4 11.Nd4 Be7 12.Nd2 Nb6 (12...0–0!?=) 13.Bb5+= Nbd7 14.Qa4 (14.Nc6 Qb6 15.Bf6 gf6+=) 14...0–0= 15.Nc6 Bc6 16.Bc6 Rb8 (16...Nc5!? 17.Qd1 Rb8=) 17.Bd4 a5 (17...Bc5 18.Bc5 Nc5 19.Qa7 Qd2 20.Qc5+/–) 18.Rab1 (18.Nb3 e5 19.Bc3 Nb6 20.Qa5 Qd6+/–) 18...Rb1 (18...Rb4 19.Rb4 ab4 20.Qb5=) 19.Rb1+/– Nc5 20.Qb5 Ncd7 21.Nc4 Nb8 (21...Qc7!? 22.Na5 Bd6+/–) 22.Na5 Nc6? (better is 22...Qc7+–) 23.Nc6 Qd7 24.Ne7 Qe7 25.Bc5 (25.Bc5 Qe8 26.Bf8 Qf8 27.Qb8+–) 1–0. carocan (1705) – rysiekk50, kurnik, 2011.

6.c4 Nf6 7.Be2 Nc6 8.0–0 Qb6 9.Bf6 gf6 10.Nc3 Be7 11.Rb1 Qc7 12.Nb5 Qc8 13.d4 a6 14.Nc3 White plans d5 14...Rg8 15.d5 Nb4? (better is 15...Ne5!?+/–) 16.a3+– e5 (16...f5 17.Qb3+–) 17.ab4 cb4 18.Ne4 f5 19.Ng3 d6 20.Qa4 Kf8 21.Qb4 Rb8 22.Rfc1 f4 23.ef4 ef4 24.Ne4 Qh3 25.Ng3 Qh6?? 26.Ne4 Qh3 27.Ng3 Qh6 28.Qd2 Bh4 29.Qd4 Bf6 30.Qe4 fg3+/– 31.hg3 Qg6 32.Qg6 Rg6 33.Rb6 Bd8 34.Rb4 Ba5 35.Rb3 Bc7 36.Rcb1 a5 37.Rb7 Rb7 38.Rb7 Bd8 39.Rb8 Ke8 40.Ra8 Kd7 41.Bd3 f5 42.Bf5 Ke7 43.Bg6 hg6. bratek55 (1655) – irbas, kurnik, 2011.

4.Nf3 c6

5.c4 Qc7 6.Nc3 d6 7.Be2 Nd7 8.0–0 0–0–0? (better 8...Ngf6+=) 9.a4+– f6 (9...Ne5+–) 10.a5 ba5 (10...Re8 11.ab6 ab6 12.Ra7+–) 11.Ra5 Kb8 (11...a6 12.Qa4+–) 12.Qa4 Qb6 (12...a6 13.Ra1 Nh6 14.c5 dc5 15.Ba6+–) 13.Rb1 g5 (13...Ne7 14.Ba3 Qc7 15.c5+– (worse 15.Ra7 Nb6 16.Qa5 Nbc8 17.Rb7 Kb7+–)) 14.Ba3 a6 (14...h5+–) 15.c5 dc5 16.bc5 Qa7 (16...Nc5 17.Bc5 Bc5 18.Ba6 Qb1 19.Nb1 Bb6+–) 17.Ra6 Nc5 (17...Qb6 18.cb6 Kc8 19.Ra7 Nb8 20.Rb7 Rd7 21.Rd7 Kd7 22.Qa7 Ke8 23.Qb8 Kf7 24.Ne5 fe5 25.Bh5 Kf6 26.Qf8) 18.Ra7 Na4 (18...Rd3 19.Ra8 Kc7 20.Qa5 Kd7 21.Qd8) 19.Rbb7 (19.Na4?! Ka7 20.Nc5 Bc8+–) 19...Kc8 20.Ba6 Nc3 (20...Ba3 21.Ra8) 21.Ra8 1–0. Guest – Guest287, internet, 2020.

5.c4 d5 6.c5 bc5 7.bc5 Nf6 8.Qc2 Qe7 9.Ba3 Nbd7 10.d4 g6 11.Nbd2 Bg7 12.Bd3 0–0 13.Rb1 Rab8 14.0–0 Ba8 15.Nb3 Ne8 16.Na5 Rb1 17.Rb1 Nc7 18.Qa4 Nb5 19.Bb5 cb5 20.Rb5 Qd8 21.c6 Nb6 22.Qc2 Re8 23.c7 Qc8 24.Bd6 Bf8 25.Bf8 Rf8 26.Ne5 f6 27.Ng6 hg6 28.Qg6 Kh8 29.Qh6 Kg8 30.Qg6 Kh8 31.Qh6 Kg8 32.Qg6 ½–½. karoo54 – jhon2, kurnik, 2012.

5.Be2 Qc7 6.0–0 d6 7.c4 Nd7 8.d4 0–0–0 9.Nbd2 Be7 10.a4 Ngf6 11.Rc1 h6 12.c5 d5 13.cb6 ab6 14.b5 c5 15.dc5 Bc5 16.Nb3 g5 (16...Rhg8 17.a5! Ne4 18.Bd4+–) 17.Nc5 (17.a5 g4 18.Nfd2 g3 19.ab6 gh2 20.Kh1 Bb6 21.Rc7 Bc7+–) 17...Nc5?? (17...bc5 18.Qc2 Kb8+–) 18.Bf6 1–0. bratek55 – 2waldemaro, kurnik, 2011.

5.Be2 d5 6.0–0 a6 7.d3 Nf6 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–) 8.a3 Be7 9.Nbd2 0–0 10.c4 Nbd7 11.Qc2 c5 12.b5 ab5 13.cb5 Rc8 14.Rac1 Ra8 15.Rfd1 Qb8 16.h3 h6 17.Ra1 Rc8 18.Rdc1 Ra5 19.a4 Ra8 20.Qd1 e5 21.e4 d4 22.Nc4 Qc7 23.Qb3 Bf8 24.Rf1 Ne8 25.Nh4 g6 26.Bc1 Nd6 27.Nd6 Qd6+= 28.Bd2 Qf6 29.g3 Rc7 30.f4 Qe7?? 31.Ng6+– Qe6? 32.Nf8?? Qb3–+ (32...Qb3 33.Nd7 Rd7 34.fe5 Be4 35.de4 Qg3 36.Kh1 Qh3 37.Kg1 Kh7–+) 0–1. ejdrzej (1710) – westernos (1725), kurnik, 2011.

5.Be2 h6 6.0–0 Nf6 7.a3 Bd6 8.c4 c5 9.b5 Qc7 10.g3 a6 11.d4 ab5 12.cb5 Ne4 13.Nc3 f5 14.Ne4 Be4 15.Nd2 0–0 16.Ne4 fe4 17.d5 Be7 18.f4 Bf6 19.Bf6 Rf6 20.Qc2 ed5 21.Rfd1 Qd6 22.Rd2 Qe6 23.Rad1 Rg6 24.Rd5 Qh3 25.a4 d6 26.Qe4 Kh7 27.Rd6 Ra4 28.Qg6 Kh8 29.Rd8 1–0. surmavlod – sabbin, kurnik, 2012.

4.Nf3 Nc6

5.a3 a5 6.b5 Nce7 7.a4 Ng6 8.Be2 Nf6 9.0–0 Qe7 10.Ne5 Ne5 11.Be5 d6 12.Bg3 h5 13.h4 (13.Bh4 0–0–0=) 13...Nd5 (13...Ne4 14.Bf3=+) 14.c4= Nb4 15.Bh5 g5 16.Qg4 (16.Bf3 0–0–0=+) 16...gh4 (better 16...Qf6!? 17.d4 Qh6 18.Bf7 Kf7 19.Qg5 Be7 20.Qh6 Rh6–+) 17.Bh4= Qd7 18.Bf6 Rh5? (18...Rh6 19.Qg5 d5 20.cd5 Nd5= (worse 20...Qd5 21.Bf3 Qf3 22.gf3+–; worse 20...Bd5 21.Nc3+=)) 19.Qh5+– e5 20.g4 (better 20.d4+–) 20...Qe6+– 21.g5 Qc4 22.Nc3 Qd3 23.Rad1 Nd5 24.Nd5 Qd5 25.f3 Kd7? (25...Qd3!?+–) 26.e4 (26.d4 Qe6 27.de5 Re8+–) 26...Qd4 (better 26...Qe6+–) 27.Kg2 Be7?! (27...Qc4 28.Qg4 Qe6 29.Qe6 Ke6+–) 28.Qf7 Re8 29.g6 Kd8 (29...Be4 30.fe4 Qe4 31.Kg3 Qd3 32.Rf3 Qc2+–) 30.g7 Bf6 31.Qf6 Kc8 32.g8Q (32.Qf7 Kd8 33.Rh1+–) 32...Rg8=+ 33.Kh3 Qd3?? (better 33...Kb8 34.Qf7 Bc8 35.Kh2 Rh8 36.Kg3 Rh3 (worse 36...Qa4 37.Rc1 c5 38.bc6+–) 37.Kg2 Rh6= (worse 37...Qa4 38.Rc1 c5 39.bc6+–)) 34.Qe6+– (34.Qe6 Kb8 35.Qg8 Ka7 36.Rc1+–) 1–0. beatmeeasy (1985) – WINAKT (1825), lichess.org, 2021.

5.a3 d6 6.c4 Nf6 7.Be2 Ne4 (7...Be7 8.0–0+=) 8.d3+/– Ng5 9.Nbd2 Be7 (9...a6 10.0–0+/–) 10.0–0 (10.Bg7 Rg8 11.Bb2 a6+/–) 10...Bf6 11.Bf6 Qf6 12.Ng5 Qg5 13.Nf3 Qg6 14.e4 (14.d4 a6+=) 14...Ne7 (14...0–0 15.Qd2=) 15.Nd4 (better is 15.Qa4 Kd8 16.c5+=) 15...f5?? (15...0–0 16.Qa4 c6 17.f4=) 16.Bf3 (16.Bh5!? Kd7 17.Bg6 hg6+–) 16...fe4?? (16...0–0–0 17.ef5 Nf5 18.Bb7 Kb7 19.Nf5 Qf5 20.a4+=) 17.de4 e5?? 18.Nf5 Rf8?? 19.Bh5+– Qh5 20.Qh5 g6 21.Ng7 Kd8 22.Qh7 c6 23.Ne6 Kd7 24.Nf8 Rf8 25.f3 g5 26.Qg7 Rf4 27.Qg5 c5 28.bc5 bc5 29.Rab1 Ba6 30.Rfd1 Bc4 31.Rb7 Ke8 32.Qe7 1–0. Fournier,Frederic (1790) – Entertainmet69, Active (5/0), 2005.

5.a3 d6 6.g3 f5 7.Bg2+= Nf6 8.Ng5 Qd7?? (better 8...Qe7+=) 9.Bf6+– gf6 10.Qh5 Kd8 11.Nf7 Kc8 12.Nh8 Ne5 (12...Nd8 13.Bb7 Kb7+–) 13.0–0 Qg7 (13...Bg2 14.Kg2 Qc6 15.Kh3 Kb7+–) 14.Qe8 1–0. Guest – Guest632, internet, 2020.

5.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 Nc6).

5.b5 Nb4 6.c4 d5? 7.a3+– dc4 (7...Nf6 8.ab4 Bb4 9.cd5 Bd5 10.Ra4+–) 8.ab4 Nh6 (8...Nf6 9.Bc4 Bb4 10.0–0+–) 9.Bc3 (9.Bc4 Nf5+–) 9...c6 (9...Bd5 10.Na3+–) 10.bc6 (10.Bc4 Nf5+–) 10...Bc6 11.Bc4 b5 12.Be2 Ng4 13.0–0 Bd6 14.Bg7 Rg8 15.Bb2 Bf3?? 16.Bf3 Bh2= 17.Kh1 Qh4 18.Bg4 Be5?? 19.Bh3+– Bb2 20.Ra2 Be5 21.Qf3 Rc8 22.Qb7 Rd8 23.Qb5 Ke7 24.Qe5 Rg5 25.Ra7 Rd7 26.Rd7 Kd7 27.Qd4 Ke7 28.Qh4 h6 29.b5 Kd6 30.Rc1 f5 31.Qd4 Ke7 32.Rc7 Ke8 33.Qd7 Kf8 34.Qd8 1–0. tanto – maf, net–chess.com, 2001.

5.b5 Nb4 6.c4 e5!? 7.Ne5 d6 +–.

5.a3 Qe7

6.d4 Nf6 7.c4 Ba6? (better is 7...Qd6+=) 8.b5+– Bb7 (8...Nd4 9.Bd4 Bb7 10.Be2+–) 9.bc6 Bc6 10.Nc3 d5 (10...Ne4 11.Ne5+–) 11.cd5 ed5 12.Ne5 Qd6 13.Nc6 Qc6 14.Bb5 Qd7 15.Bd7 Nd7 16.Nd5 Bd6 17.Rc1 0–0 18.Qg4 Rad8 19.0–0 Rc8 20.Qd7 Rcd8 21.Qg4 c5 22.dc5 f6 23.Nf6 Kf7 24.cd6 Rd6 25.Rc7 Rd7 26.Rd7 1–0. Fournier,Frederic (1895) – Deblock Gilbert, FRA Ch (Team) Picardie 3B Senlis–Bernot, 2008.

5.b5 Nb8

6.Nc3 a6=.

6.c4 a6 7.Be2=.

6.c4 c6 7.a4 (7.Be2 Nf6+=) 7...cb5 (7...a6 8.Be2=) 8.cb5 (8.ab5 d5+=) 8...Nf6= 9.d4 Bf3 (9...a6 10.Bd3=) 10.Qf3+= d5 11.Bc4 (11.Bd3!?+=) 11...Bb4= 12.Nd2?? (better is 12.Kd1=) 12...Bd2–+ 13.Kd2 Nbd7?? (13...Ne4 14.Ke1 Ng5=+) 14.Bd3= 0–0 15.Rhc1 Rc8 16.Rc8 Qc8 17.Rc1 Qb8 18.Rc6 Rc8 19.Qg3 Qb7= 20.Rc8 Qc8 21.Qd6 Qb8 22.Qb8+/– Nb8 23.f3 g6 24.Kc3 Nbd7 25.Kb4 h5 26.e4 Nh7 27.a5 f5 28.a6 fe4 29.fe4 Kf7 30.ed5 ed5 31.Bc1 Nhf8 32.Bf4 Ne6+= 33.Bd6 Nd4=+ 34.Bf4 Ne6–/+ 35.Bd6 Kf6 36.Be2 Nd4 37.Bf3 Nf3 38.gf3 Ke6 39.Bc7 Kf5 40.Kc3 Ke6 41.Kd4 g5 42.h3 g4?? 43.fg4+– hg4 44.hg4 Kf6 45.Kd5 Ke7 46.Kc6 (46...Ke6 47.Kb7+–) 1–0. Trkn – RICHARD GIRARD, itsyourturn.com, 2001.

5.b5 Nce7

6.Bd3 Ng6 (6...a6 7.ba6 Ba6 8.Ba6 Ra6 9.0–0=) 7.c4 (7.0–0 a6=) 7...Nf6= 8.Bg6 (8.0–0 a6=) 8...hg6 9.d4 (9.d3 a6=) 9...d5 (9...a6 10.Ba3+=) 10.Nbd2 (10.cd5 Bd5 11.Qe2 a6=) 10...Bb4 (10...dc4 11.Qc2+=) 11.0–0 (11.Qa4 Bd2 12.Kd2 dc4 13.Qc4 Ne4 14.Ke1 Ng5+=) 11…Bd2 (11...Bd2 12.Qd2 dc4–/+) 0–1. Istvanny – cocohubert (1690), internet, 2007.

4.Nf3 d5

5.a3 Nd7 6.Bb5 A) 6...a6 7.Bd7 (7.Be2 Ngf6 8.0–0 Bd6 9.d4 c5 10.dc5 bc5 11.c4 0–0 12.cd5=) 7...Qd7 8.Ne5 Qd6 9.0–0 Nf6 10.d3 Be7 11.Ng4 c5 12.bc5=; B) 6...Ngf6 7.Ne5 (7.0–0 c6 8.Be2 Bd6 9.Nc3 0–0 10.Re1 e5 11.Nh4 d4 12.ed4=) 7...a6 8.Bc6 Qc8 9.Nd7 Nd7 10.Bb7 Qb7 11.0–0 c5 12.f4=; C) 6...c6 7.Bd3 (7.Be2 Ngf6 8.0–0 Bd6 9.Nc3 0–0 10.Bd3 a5 11.b5 c5 12.Re1+=) 7...Ngf6 8.0–0 Bd6 9.Nc3 0–0 10.Qe2 e5 11.Bf5 Qc7 12.e4+=.

5.a3 Nd7 6.Nc3 Ngf6 (6...e5 7.Be2 (7.Bb5 Bd6 8.0–0 Ngf6 9.d4 e4 10.Nh4 g6 11.Be2 c6 12.Qd2+=) 7...Ngf6 8.0–0 Be7 9.d4 e4 10.Ne5 a6 11.Qd2 0–0 12.Nb1=; 6...a5 7.b5 Ngf6 8.Be2 Bd6 9.Nd4 0–0 10.f4 a4 11.0–0 Bc5 12.Nc6=) 7.b5 (7.Be2 c5 8.b5 Bd6 9.0–0 0–0 10.a4 e5 11.Nh4 d4 12.Na2+=; 7.Bd3 c5 8.bc5 Bc5 9.0–0 0–0 10.Qe2 e5 11.Bf5 Re8 12.Qd1=) 7...Be7 (7...Bd6 8.Be2 0–0 9.0–0 a6 10.a4 e5 11.ba6 Ba6 12.Nb5+=) 8.Be2 c5 (8...a6 9.a4 0–0 10.0–0 e5 11.Re1 Re8 12.d3+=) 9.bc6 Bc6 10.0–0 (10.Nd4 Bb7 11.0–0 0–0 12.f4=) 10...0–0 (10...e5 11.d4 e4 12.Ne5=) 11.Nd4 Bb7 12.f4 a6 13.Rf3 Bc5 14.Rg3 Bd4 15.ed4 Ne4 16.Ne4 de4 17.c4 Nf6 18.a4 Rc8 19.a5 ba5 20.Bc3 a4 21.Qa4 e3 (better is 21...Qc7!?=) 22.Re3 Ne4 23.Qc2 f5 24.Bb2 Bd5? (better is 24...Qc7 25.Rf1 Qd6+/–) 25.d3+– (worse is 25.Ra6 Qh4 26.g3 Qh3+–) 25...Nf6 26.Qd2 Bc6 27.Re6 Ng4 28.d5 Qh4 (28...Bb7+–) 29.Bg4 (29.Rc6?? Qh2 30.Kf1 Qh1; 29.dc6?? Qh2 30.Kf1 Qh1) 29...fg4 (29...Bd5 30.cd5 fg4 31.Qe3+–) 30.dc6 g3 31.hg3 Qg3 32.Re7 Rf7 33.Rf7 Kf7 34.Ra6 Re8 35.Ra7 Kg8 36.Rg7 Qg7 37.Bg7 Kg7 38.Qa5 1–0. pierre – salve, internet, 2011.

5.a3 Nd7 6.Bd3 A) 6...a6 7.0–0 (7.Nc3 Ngf6 8.0–0 Bd6 9.Rb1 0–0 10.Re1 c5 11.b5 c4 12.ba6+=) 7...Ngf6 8.Ne5 Ne5 9.Be5 Bd6 10.f4 0–0 11.Qf3 c5 12.bc5=; B) 6...Ngf6 7.0–0 (7.Nc3 c5 8.bc5 Bc5 9.0–0 0–0 10.Qe2 e5 11.Bf5 Re8 12.Qd1=) 7...c5 8.bc5 Bc5 9.Ne5 Ne5 10.Be5 0–0 11.Qf3 Nd7 12.Bb2=; C) 6...c5 7.0–0 (7.bc5 bc5 8.Nc3 Rb8 9.Rb1 c4 10.Be2 Qa5 11.Qc1 e5 12.0–0=) 7...Ngf6 8.bc5 Bc5 9.Ne5 Ne5 10.Be5 0–0 11.Qf3 Nd7 12.Bb2=.

5.a3 Nd7 6.Be2 A) 6...Ngf6 7.0–0 (7.Nc3 c5 8.bc5 Bc5 9.0–0 0–0 10.Qb1 Rc8 11.Rd1 Re8 12.a4=) 7...Be7 8.Nc3 0–0 9.d4 a5 10.b5 Rc8 11.Bd3 c5 12.bc6=; B) 6...a6 7.d4 (7.0–0 Ngf6 8.Nc3 c5 9.b5 Bd6 10.ba6 Ba6 11.Ba6 Ra6 12.Nb5=) 7...Ngf6 8.Nbd2 Bd6 9.c4 dc4 10.Nc4 0–0 11.0–0 Be7 12.Rc1=; C) 6...c5 7.bc5 (7.b5 Ngf6 8.Nc3 Bd6 9.0–0 0–0 10.d4 Qc7 11.a4 Rfc8 12.Re1+=) 7...bc5 8.Nc3 Rb8 9.Rb1 Ngf6 10.a4 e5 11.0–0 d4 12.Nb5+=.

5.a3 Be7 6.Bg7 Bf6 7.Bh8 Bh8 8.Nc3 Bc3 9.dc3 Qf6 10.Be2 (better 10.Qd2!? Nd7+–) 10...Qc3 11.Kf1 Nc6 12.Rb1 (12.Ra2 a6+–) 12...0–0–0 13.Rb3 Qf6 14.b5 Na5 15.Rb1 Kb8 (15...e5 16.Ke1+–) 16.a4 (16.Qd4 Qe7+–) 16...Nh6 (16...d4 17.ed4 Bf3 18.Bf3 Rd4+–) 17.Nd4 (17.Qd4 Qg6+–) 17...Nf5 (better 17...e5 18.Nf3 d4 19.ed4 Nf5+=) 18.c4?? (better 18.Nf5 Qf5 19.Qd3+–) 18...dc4 (better 18...Ne3 19.Kg1 Nd1 20.Rd1 dc4–+) 19.Nf5 (19.Qc1 Ne3! 20.Qe3–+) 19...Qf5 (better 19...Rd1 20.Rd1 Qf5–+) 20.Bf3 (better 20.Qd8 Bc8 21.Rc1+–) 20...Bf3 (better 20...Rd1 21.Rd1 c3 22.Rd8 Bc8–+) 21.Qf3?? (21.Qd8 Kb7 22.Re1+– (22.gf3?! Qb1 23.Kg2 Qg6 24.Kh3 Qh5 25.Kg3 Qg6 26.Kh3 Qf5 27.Kg2 Qg6 28.Kh3=)) 21...Qb1 22.Ke2 Qc2 23.Ke1 Qb1 (23...Qc1 24.Qd1 Qd1) 24.Ke2 Qc2 25.Ke1 Qc1 26.Ke2 (26.Qd1 Qd1) 26…Rd2 0–1. avz81 – ftsantana, lichess.org, 2018.

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

5.a4 Bb4?? 6.Bg7 Nf6 7.Bh8 +–.

5.a4 Nd7 6.Be2 Bb4?? 7.Bg7 Ngf6 8.Bh8 +–.

5.b5 Nd7 6.c4 dc4 7.Bc4 a6 8.a4 a5 (8...Ngf6 9.0–0=) 9.0–0+= Ngf6 10.Nd4 Bc5 (10...Bd6 11.Nc6 Bc6 12.bc6+=) 11.Be6 (11.Nc6!? Bc6 12.bc6+=) 11...fe6= 12.Ne6 Qc8 13.Ng7 Kf7 14.Nf5 Rg8? (better 14...Qe8=) 15.Nh6+– Kf8 (15...Ke7 16.Ng8 Qg8 17.f3+–) 16.Ng8 Kg8 17.Bf6 (17.Nc3 Qe8+–) 17...Nf6+– 18.d4 Bb4 19.Nd2 (19.f3 Qe6 20.Qc1 Rd8+–) 19...Qf5 (19...Bd2 20.Qd2 Bg2 21.Kg2 Qg4 22.Kh1 Qf3 23.Kg1=) 20.Rc1 (20.f3 Bd5 21.e4 Qf4+–) 20...Rc8?? (better 20...Bd2 21.Rc7 Bg2 22.Kg2 Kh8=) 21.f3 Qd3 (21...Qg5 22.Nc4+–) 22.Nc4 Qg6 (22...Qd1 23.Rfd1 (worse 23.Rcd1 Nd5+–) 23...Nd5 24.Rd3+–) 23.Ne5 Qh6 24.Qd3 Nd5 25.f4 Nf6 (25...Rf8 26.Rf3 Qe6 27.Rg3 Kh8 28.Rh3+–) 26.Nc6 (26.Qf5 Qg7 27.Rf3 Qe7+–) 26...Ng4 (26...Bd6 27.Rf3+–) 27.h3 Nf6 28.Rf3 (28.e4!? Kh8+–) 28...Kh8 29.Rg3 (better 29.e4+–) 29...Nd5? (better 29...Bd6+–) 30.Qf5 (30.Nb4?! ab4 31.Qe4 Qd6+–) 30...Nc3 (30...Nf6 31.Ne5 Qf8+–) 31.Qe5 (31.Qe5 Qf6 32.Qf6) 1–0. DEFFM – GuestWSGT, freechess.org, 2019.

5.b5 Qg5?? 6.Ng5+– f6 (6...Nf6 7.Be5+–) 7.Ne6 Bc5 8.Ng7 (8.Qg4!? Bf8 9.Qg3 Nd7 10.Qc7 Rc8 11.Qb7 Ne7+–) 8...Kf7 9.Qg4 Nh6 10.Qe6 Kg7 11.Qf6 Kg8 12.Qg7 1–0. DEFFM – GuestWRPR, freechess.org, 2018.

5.c4 Bb4?? 6.Bg7 dc4 7.Bc4 +–.

5.c4 Bb4?? 6.Bg7 Nh6 7.Bh6 (better 7.Bh8 dc4 8.Bc4+–) 7...Qf6 8.Nd4 (8.Qa4!? Nd7 9.Qb4 Qa1 10.cd5+–) 8...Qh6 9.Qa4 Nc6?? (better 9...Nd7 10.cd5 Bd5+=) 10.Nc6+– Bd2 (10...Bc6 11.Qc6 (11.Qb4?! d4+–) 11...Ke7 12.cd5+–) 11.Nd2 Kf8 (11...0–0 12.cd5 Qf6 13.Rc1 ed5 14.Bd3+–) 12.Qb4 (12.Rc1!? Qf6+–) 12...Kg7 13.Qc3 (better 13.cd5 ed5 14.Ne7 Qf6+–) 13...f6 (13...Qf6 14.Qf6 Kf6 15.cd5 ed5 16.Rc1+–) 14.cd5 ed5 (14...Rhe8 15.de6 Qg6 16.Nd8 Rad8 17.Qc7 Kh6 18.Qb7 Re6 19.Qf3+–) 15.Nd4 c6 (15...Kg8 16.Nf5 Qg5+–) 16.Nf5 (16.Nf5 Kg6 17.Nh6+–) 1–0. GuestZCDR – pateupegui, freechess.org, 2016.

5.c4 dc4 6.Bc4 Bb4?? 7.Bg7 Nf6 8.Bh8 +–.

5.c4 c5 6.b5 dc4 7.Bc4 Nf6 8.0–0 Be7 9.Nc3 0–0 10.h3. GuestNKQM – GuestVKZW, freechess.org, 2017.

5.c4 c5 6.cd5 Qd5 7.Bb5 Nd7+=.

5.c4 Nd7 6.Be2 (6.cd5 Bd5 7.b5 Ngf6=) 6...c6 (6...Bb4?? 7.Bg7 dc4 8.Bh8+–) 7.a4 (7.0–0 dc4 (7...Bb4?? 8.Bg7 dc4 9.Bc4+–) 8.Bc4 A) 8...Bb4 9.Bg7 b5 10.Be2+– (10.Bh8?! bc4 11.Qa4 a5+–); B) 8...Ngf6=) 7...a6 (7...Ngf6 8.Bc3=) 8.0–0 h6 (8...Ngf6 9.Bc3=) 9.b5 (9.cd5 cd5 10.Bc3 Ngf6=) 9...dc4= 10.Bc4 cb5 11.ab5 ab5 12.Bb5 Ra1 13.Ba1 Ngf6 14.Qa4 (better is 14.Bf6 Qf6 15.Qa4+/–) 14...g5?? (better is 14...Bf3!? 15.gf3 Bd6=) 15.Ne5 (15.Bf6 Qf6 16.Bd7 Kd8+–) 15...Bc8?? (better is 15...Rg8+/–) 16.Nd7 Bd7 17.Bd7 (17.Bf6 Qf6 18.Bd7 Ke7+–) 17...Qd7 18.Qd7 (18.Qa8 Ke7 19.Bc3 e5 20.Bb4 Ke6 21.Bf8 Nh7 22.Qa2 Qd5 23.Qd5 Kd5 24.Bh6 b5+–) 18...Kd7 19.Bf6 (19...Rg8 20.Nc3+–) 1–0. pumpkin (2230) – beammeupscotty (2180), net–chess.com, 2005.

5.Be2 Bb4?? 6.Bg7 Ba6 7.Bh8 +–.

5.Be2 Qe7 6.a3 Nc6 7.0–0 0–0–0 8.b5 Na5 9.d3 (9.Bc3 Nc4+–) 9...Qc5 (9...Qe8 10.a4+–) 10.a4 Nh6?? (better 10...Qd6+–) 11.Ba3+– Nb3 Black intends d4 (11...Qd6 12.Bd6 Bd6+–) 12.cb3 Qa3 (12...d4 13.Bc5 Bc5 14.ed4 Bd4 15.Nd4 Rd4 16.a5+–) 13.Na3 d4 (13...Bd6 14.d4+–) 14.Nd4 Bc5 15.Bf3 (15.Ndc2 Nf5+–) 15...Bd4 16.Bb7 Kb7 17.Qf3 Kb8 18.ed4 Rd4 19.Nc2 Rd6 20.Nb4 Nf5 21.Na6 Kc8 22.Qa8 Kd7 23.Qh8 Rd3 24.Rad1 Rd1 25.Rd1 Ke7 (25...Nd6 26.Qf8 e5 27.Qf7 Kd8 28.Qc7 Ke8 29.Rd6 e4 30.Rd8) 26.Qd8 1–0. DEFFM – GuestRRJQ, freechess.org, 2018.

5.Be2 Nf6 6.a3 c5=.

5.Be2 Nf6 6.b5 Nbd7 7.0–0 c5 8.c4 Be7 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).

5.Be2 Nf6 6.b5 Be7 7.c4 c6 8.a4 0–0 9.0–0 c5 10.a5 Nbd7 (10...ba5!? 11.Qa4 Nbd7=) 11.a6+– Bc8 12.Nc3 Re8 13.d4 Nf8 (13...dc4 14.Bc4 h6 15.Rc1+–) 14.Ne5+– Ng6 15.Nc6 Qd7 (15...Qd6 16.dc5 bc5 17.Bf3+–) 16.cd5 Nd5 (16...ed5 17.dc5 (17.Ne7?! Ne7 18.dc5 bc5+–) 17...Bc5 18.Bf3+–) 17.Nd5+– Qd5?? (better 17...ed5 18.dc5 Bc5+–) 18.Bf3 (18.Bf3 Qc4 19.Ne7 Ne7 20.Ba8 Qb5 21.Qd2 Ba6 22.Be4+–) 1–0. DEFFM – GuestVVGF, freechess.org, 2019.

5.a3 a5

6.ba5 Ra5 7.Bc3 (7.Be2 Nf6 8.0–0 Bd6 9.Nc3 0–0 10.Nb5 Be7 11.Nbd4 Nbd7 12.Nb3=) 7...Ra8 8.Be2 Nf6 9.0–0 Bd6 10.Be5 0–0 11.d4 Ba6 12.Ba6=.

6.b5 A) 6...Nd7 7.Nc3 (7.Be2 Ngf6 8.Nd4 Bc5 9.f4 0–0 10.0–0 Ne4 11.Nb3 Bd6 12.d3=) 7...Ngf6 8.Be2 Bd6 9.Nd4 0–0 10.f4 a4 11.0–0 Bc5 12.Nc6=; B) 6...Nf6 7.Be2 (7.Bd3 Bd6 8.0–0 0–0 9.Be5 c5 10.Be2 Be5 11.Ne5 Nbd7 12.Nd7=) 7...Bd6 8.Be5 0–0 9.d4 Be5 10.Ne5 Nbd7 11.Nd7 Qd7 12.0–0=.

6.Bd3 A) 6...Nf6 7.b5 (7.ba5 Ra5 8.Bc3 Ra8 9.0–0 Bd6 10.Be2 Nbd7 11.Bb2 0–0 12.Nd4+=) 7...Bd6 8.0–0 0–0 9.Be5 c5 10.Be2 Be5 11.Ne5 Nbd7 12.Nd7=; B) 6...c6 7.0–0 (7.b5 Nf6 8.Nc3 c5 9.0–0 Bd6 10.Ng5 0–0 11.f4 h6 12.Nf3=) 7...Nf6 8.b5 Bd6 9.Ne5 0–0 10.f4 cb5 11.Bb5 Ba6 12.Ba6=; C) 6...ab4 7.ab4 Ra1 8.Ba1 Nf6 9.b5 Bd6 10.Be5 0–0 11.Bd6 Qd6 12.Be2=.

6.Be2 A) 6...Nf6 7.b5 (7.ba5 Ra5 8.Nc3 Bc5 9.0–0 0–0 10.Nb5 c6 11.Nbd4 Bd6 12.a4=) 7...Bd6 8.0–0 0–0 9.Be5 Be5 10.Ne5 Nbd7 11.f4 Rc8 12.Nc3=; B) 6...c6 7.b5 (7.ba5 Ra5 8.Bc3 Ra4 9.0–0 Nf6 10.Be5 Nbd7 11.Bb2 Ra8 12.Nc3=) 7...Nf6 8.bc6 Nc6 9.Nc3 Bd6 10.Nb5 Be7 11.0–0 0–0 12.Rb1=; C) 6...ab4 7.ab4 Ra1 8.Ba1 Nf6 9.b5 Bd6 10.Be5 0–0 11.0–0 Be5 12.Ne5=.

5.c4 Nf6

6.a3 Nbd7 7.Be2 c5 8.b5 Be7 9.0–0 0–0 10.d3 Qc7 11.Nbd2 Rad8 12.Qc2 e5 13.Nb3 (13.cd5 Bd5 14.e4 Bb7+=) 13...d4 14.e4 Qd6 (14...Ra8 15.Rfb1=) 15.Nh4 g6 16.Bc1 (better is 16.Nf3!?=) 16...Ne4!–/+ 17.de4 Bh4 18.f4 (18.Bd3!?–/+) 18...f5–+ 19.Bd3 fe4 20.Be4 Be4 21.Qe4 Bf6 22.Nd2 ef4–+ 23.Qf4 Be5 24.Qh4 d3 25.Rb1 Bd4 26.Kh1 Rf1 27.Nf1 Rf8 28.Bh6 Bg7 29.Bd2 Qe6 30.Re1?? Qe2!! 31.Kg1 Bd4 32.Be3 Rf1! 33.Rf1 Be3 (34.Qf2 d2 35.h3 Bf2 36.Kh2 Qf1 37.h4 d1Q 38.h5 Qh5) 0–1. Trip,R – van Dulken,A, Barneveld, 2000.

6.Qb3 Be7 7.a4 Nbd7 8.d4 dc4 9.Bc4 Bf3 10.gf3 0–0 11.Nd2 c5 12.b5 Rc8 13.0–0 Qc7 14.Be2 Nd5 15.f4 Qd8 16.Bf3 N7f6 17.Rac1 Nb4 18.Nc4 Nfd5 19.Rfd1 Qc7 20.dc5 Bc5 21.Ne5 Qe7 22.Ba3 Rfd8 23.Bb4 Nb4 24.Nc6 Nc6 25.bc6 Rd1 26.Rd1 a5 27.Rd7 Qf6 28.Qd3 Qa1 29.Kg2 Qa4 30.Rd8 Rd8 31.Qd8 Bf8 32.c7 1–0. marvis (1795) – kasiaw166 (1775), kurnik, 2012.

6.cd5 Bb4? 7.Qa4 c6 8.Qb4 ed5 9.Be2 +–.

6.cd5 Bd5 7.b5 c5 8.Be2 Be7 9.0–0 0–0 10.Nc3 Bb7 11.a4 Nbd7 12.d4 Nd5 13.Nd5 Bd5 14.dc5 Nc5 15.Ba3 Ne4 16.Be7 Qe7 17.Nd4 Rac8 18.Bf3 e5?? (18...Nc3 19.Qd2 Bf3 20.Nf3+=) 19.Be4 Be4–/+ 20.Nb3?? Bc2–+ 21.Qg4 Bb3 22.Rac1 Be6 23.Qe4 Rc1 24.Rc1 f6 25.h3 Rd8 26.Rc6 Bd5 27.Qd5 Rd5 28.Rd6 Qd6 29.Kf1 Rd1 30.Ke2 e4 31.g4 Qd3# 0–1. olawoj – varin123, kurnik, 2012.

6.cd5 Nd5 7.a3=.

6.Be2 Bb4 7.0–0?? (better is 7.Qa4 Nc6 8.Ne5+/–) 7...dc4 (7...0–0 8.d4–/+) 8.Bc4 (8.Qa4 Nc6 9.Ne5 Qd6+=) 8...0–0–/+ 9.d4 c5 10.a3 Ba5 11.dc5 Qd1 12.Rd1 Bf3 13.gf3 bc5 14.Bf6 gf6 15.Bd3 (15.Nd2 Bd2 16.Rd2 Nc6+=) 15...Nc6 (15...Rd8!? 16.Be2 Rd1 17.Bd1–+) 16.Be4 Rac8 17.Nd2 f5 18.Bc2 (18.Bc6!? Rc6 19.Nc4+=) 18...Bd2 19.Rd2 Ne5 20.Kg2 Kh8 21.f4 Rg8 22.Kh1 Nf3 23.Rd7 Rg7 24.Rad1 Rcg8 25.Ra7?? Rg1 (25...Rg1 26.Rg1 Rg1#) 0–1. alfons78 – rycho59, kurnik, 2012.

6.Be2 Bb4 7.cd5 Bd5?? (7...Nd5 8.e4 Ne7 9.Qc2=+) 8.0–0?? (better 8.Qa4 Nc6 9.Bb5+–) 8...0–0–/+ 9.Nc3 Bb7 10.Ne5 Nbd7 11.Nd7 Qd7 12.d4 Rad8 13.Qc2 Qc6 14.Bf3 Nd5 15.Be4 (15.Rfc1 Bc3 16.Bc3 Qc3 17.Qc3 Nc3 18.Rc3 Bf3 19.gf3 Rd7=+) 15...f5 16.Bf3 (16.Bd5 ed5 17.Rfc1–/+) 16...Ba6 (better 16...Bc3!? 17.Bc3 Qc3 18.Qc3 Nc3 19.Bb7 c5 20.dc5 bc5–/+) 17.Rfc1=+ Qe8 (17...Bc3 18.Bc3 A) worse 18...Qc3 19.Bd5 Qc2 20.Be6 (20.Rc2?? ed5 21.Rc7 Rf7–+) 20...Kh8 21.Rc2+=; B) 18...Bb7=+) 18.Nd5+= ed5 19.Qc7 Qf7 20.a3 Bd6 21.Qf7 Rf7 22.h3 Bb7 23.Be2 f4 24.e4 de4 25.Bc4 e3?? (25...b5 26.Bf7 Kf7 27.Bc3=) 26.Bf7 (better 26.fe3 g5 27.Re1+–) 26...Kf7= 27.fe3 fe3 28.Rf1 Kg6 29.Rfe1 (29.Rac1 e2 30.Rfe1 Bf4=) 29...Bf4 (29...Re8!?–/+) 30.a4 (30.Bc1 Re8 31.Ra2=) 30...Kf7 (30...Rf8 31.Ba3 Rf7 32.Bc1=) 31.a5 (31.Rf1 g5 32.g3 Rg8+–) 31...Re8 (31...Kg6 32.Bc1 Rd4 33.ab6 ab6 34.Be3 Be3 35.Re3+–) 32.ab6+– a6 (32...ab6 33.Bc1 Kg6 34.Ra3+–) 33.Rac1 (33.Bc1 Re6+–) 33...h6 (33...g5 34.Rc5+–) 34.Ba3 g5 35.g3?? (better 35.Rc3+–) 35...Bg3= 36.Rc7 (36.Re2!?=) 36...Bc7 37.bc7 Bc8 38.Kg2 h5 39.Bc1 Bb7 (39...Re7 40.Be3 Kg6 41.Kf3 Rc7 42.Ra1–/+) 40.Kf1=+ Rc8 41.Be3 Rc7 42.Bg5 Kg6 43.h4 ½–½. Darkseid (1920) – claymil (1985), ChessWorld.net, 2016. (=1.Nf3 d5 2.b4 b6 3.Bb2 Bb7 4.e3 e6)

5.Be2 c5

6.a3 cb4 7.ab4 Nf6 (7...Bb4?? 8.Bg7 Nc6 9.Bh8+–) 8.c3 Bd6 9.0–0 Nbd7 10.d3 Ne5 11.Ne5 Be5 12.Nd2 0–0 13.Qb3 Nd7 14.Bf3 Qg5 15.g3 h5 16.h4 Qg6 17.c4 Bf6 18.Bf6 Qf6 19.Bg2 dc4 20.Nc4 Bg2 21.Kg2 Ne5 22.Ne5 Qe5 23.d4 Qe4 24.Kg1 Qg4 25.Rfc1 g5 26.hg5 Qg5 27.b5 h4 28.e4 h3 29.f4 Qg4 30.Kh2?? (30.Qd3 Rad8 31.Kh2 Rd7+=) 30...Rfc8 31.Rc8 Rc8 32.Qb2 Rc7 33.Rc1 Rc1 34.Qc1 Qe2 35.Kh3 Qe4 36.Qd2? Qf5 37.Kh2 Qb5 38.g4 a5 39.Kh3 Qb4 40.Qe3 a4 41.Kh4 Qe7 42.g5 b5 43.Qe5 b4 44.Qb8 Kg7 45.Qe5 Kg8 46.Qb8 Qf8 47.Qb5 a3 48.Qa4 Qd6 49.Kg4 Qd4 50.g6 fg6 51.Qe8 Kg7 52.Qe7 Kh6 53.Qf8?? Qg7 54.Qb4 e5 55.fe5? Qe5 56.Qa3 Qf5 57.Kg3 Qg5 58.Kh2 Qf4 59.Qg3?? Qg3–+ 60.Kg3 Kg5 61.Kf3 Kh4 62.Kg2 Kg4 63.Kh2 g5 64.Kg2= Kh4 65.Kh2 Kh5 66.Kh3 Kg6 67.Kg4 Kf6 0–1. ejdrzej (1725) – babilon22, kurnik, 2012.

6.b5 a6 7.a4 Ne7 8.0–0 f6 9.c4 e5 10.d4 e4 11.Nfd2 f5 (11...cd4 12.ed4 dc4 13.Bc4+=) 12.cd5 Nd5 13.Qb3 Bd6 14.Bc4 Bc7 (14...Nf6 15.dc5 bc5 16.Rd1+/–) 15.Nc3 (better is 15.dc5!? ab5 16.Bb5 Kf8 17.cb6 Bb6 18.Rd1+–) 15...Qd6+= 16.dc5?? (better is 16.g3 Nc3 17.Bc3+=) 16…Qh2# 0–1. bratek55 (1675) – trysilgutten (1775), kurnik, 2012.

6.b5 c4 7.0–0 Nf6 8.a4 Nbd7 9.d3 cd3 10.cd3 Bd6 11.Nc3 0–0 12.Qb1 Nc5 13.Nd4 Rc8 14.Bf3 e5 15.Nf5 e4 16.de4 de4 17.Ne4 Be4 18.Be4 Nb3 19.Bf6 Qf6 20.Qb3 Bc5 21.Ng3 Rfe8 22.Bc6 Re7 23.Rad1 g6 24.Rd7 Rd7 25.Bd7 Rd8 26.Bc6 Rd2 27.Ne4 Qb2 28.Nd2 Qd2 29.Bd5 Kg7 30.Bf7 Qd6 31.Bg8 Qf6 32.Bd5 h5 33.Bc6 h4 34.Rd1 h3 35.Rd7 Kh6 36.g3 Bd6 37.Qd5 Qa1 0–1. surmavlod – roman2112 (1620), kurnik, 2012.

6.bc5 bc5 7.0–0 Nf6 8.Nc3 c4 9.Rb1 Nc6 10.d3 cd3 11.cd3 Be7 12.a3 0–0 13.Qd2 Qc7 14.Rfc1 e5 (14...Rfc8 15.Na4=) 15.Nb5 (better is 15.Na4 Qd6 16.Nc5+/–) 15...Qd8? (better is 15...Qb8+=) 16.Ne5+– Ne5 17.Be5 a5 18.a4 Bb4 19.Qb2 Ba6? 20.Nc7 Ra7 21.Na6 Ra6 22.Qd4 Re6 23.f4 Kh8 24.g4 Rg8 25.g5 Nh5?? 26.Bh5+– Be7 27.h4 f6 28.gf6 Bf6?? 29.Bf6 gf6 30.Kf2 Qe7 (30...Qe7 31.Qd5 Rd8 32.Qa5 Qf8+–). lican – chebun, kurnik, 2012.

6.bc5 bc5 7.d3 Ne7 8.Nbd2 Ng6 9.Rb1 Nd7 10.Bg7 Bg7 11.Rb7 Qc8 12.Rb1 0–0 13.0–0 f5 14.g3 Nge5 15.Ng5 Qe8 16.Bh5 Qe7 17.Nh3 Nf6 18.Nf4 Nh5 19.Qh5 Qf6 20.Rb7 Nf7 21.Nf3 Qh6 22.Qh6 Bh6 23.Ne6 Rfc8 24.Kg2 Nd6 25.Rd7 Nb5 26.Rd5 Rc6 27.Nc5 Nc7 28.Rf5 Rf8 29.Rf8 Bf8 30.Ne4 Rc2 31.Nf6 Kf7 32.Nh7 Bg7 33.Nhg5 Ke7 34.Ne4 Ra2 35.Rb1 a5 36.Rb7 Rc2 37.d4 a4 38.Nh4 a3 39.Nf5 Kf7 40.Ng7 Kg7 41.Nc5 a2 42.Rc7 Kf6 43.Ra7 Kf5 44.Kf3 Rd2 45.Ne4 Rc2 46.Nd6 Ke6 47.Ne4 Kf5 48.g4 Ke6 49.h4 Kd5 50.g5 Kc6 51.g6 Kb6 52.Ra8 Kb7 53.Ra3 Kb6 54.g7 Kb5 55.g8Q Kb4 56.Qb3 1–0. sunnyda – jhon2, kurnik, 2012.

6.bc5+= Bc5?? 7.Bg7+– Ne7 8.Bh8 Nd7 9.Bb2 Qc7 10.0–0 0–0–0 (10...Bd6 11.d4+–) 11.g3 (11.Na3 a6+–) 11...Rg8 12.d4 Bd6 13.c4! Kb8 (13...dc4 14.Qc2 Double attack (14.Qc2 Decoy)) 14.Nbd2 Nf5 15.Rc1 h5 (15...Bg3 16.Kh1 Bd6 17.cd5+–) 16.cd5 Qd8 17.Nc4 Bc7 18.de6 fe6 19.Nce5 h4 20.Nd7 Qd7 21.Ne5 Qh7 22.Bf3 Bf3 23.Qf3 hg3 24.fg3 Be5 25.de5 Qh6 26.Bd4 Nh4 27.Qf7 Rg3 28.hg3 Nf5 29.Qc7 Ka8 30.Qc8 1–0. Fournier,Frederic (1860) – RUBENS178 (1620), Active (5/0), 2005.

5.Be2 Nc6

6.b5 Na5

7.0–0 Qd7 8.Ne5+– Qd6? (better 8...Qd8+–) 9.Nf7!+– Kf7 10.Bh5 g6 11.Bh8 Bg7 12.Bg7 Kg7 13.Be2 Nh6 14.Nc3 Nf5 15.Bd3 d4 16.ed4 Qd4 (16...Nd4 17.Re1+–) 17.Re1 Re8 18.Bf5 (18.Bf5 gf5 19.Re3+–) 1–0. Speedy – Macho, internet, 2017.

5.Be2 Nd7

6.0–0 Bb4?? 7.Bg7 Ngf6 8.Bh8 +–.

6.0–0 c5 7.b5 c4 8.d3 Nc5 9.a4 cd3 10.cd3 Bd6?? (better is 10...Nf6+=) 11.Bg7+– Kd7 12.Bh8 Nh6 13.Bb2 Qe7 14.Nbd2 Rg8 15.Rc1 Nf5 16.d4 Ne4 17.Ne4 de4 18.Ne5 Kd8 19.Nc6 Bc6 20.Rc6 Nh4 21.g3 Nf3 22.Bf3 ef3 23.Qf3 Bg3 24.hg3 Qh4 25.Rfc1 Qg4 26.Qg4 Rg4 27.Rc7 Ke8 28.Ra7 h5 29.Rc8# 1–0. ejdrzej (1650) – bamboocea, kurnik, 2012.

6.0–0 Bd6?? 7.Bg7+– Qe7 8.Bh8 f6 9.Nd4 0–0–0 10.Bd3 Nh6 11.Bf6! Nf6 12.b5 Rg8 13.g3 Qd7 14.Qf3 Nfg4 15.c4 Rf8 16.Qe2 e5 17.Nb3 e4 18.Bc2 dc4 19.Qc4?? Ne5–/+ 20.Qd4?? Nf3 21.Kg2 Nd4 22.Nd4 Qf7 23.Nc3 Qh5 24.Bd1? Qe5 25.Rc1 Bc5 26.Nce2 Nf7 27.Nc6 Bc6 28.bc6 h5 29.Nf4 h4! 30.a4?? Nd6 31.a5? Nf5 32.Bg4? Kb8?? 33.ab6 cb6 34.Ng6 Qf6 35.Nf8+= Qf8 36.Rc4 Nh6 37.Re4+= Ng4 38.Rg4 hg3 39.hg3 Kc7? 40.d4+– Bd6 41.d5 a5 42.Rh1 b5 43.Rh7 Kb6 44.Rb7 Kc5 45.e4 b4 46.Ra7 Qd8 47.Rgg7 b3 48.Rgb7 Kc4 49.Rd7 Qf6 (49...Qf6 50.c7 Bc7 51.Rdc7 Kd3+–) 0–1. bratek55 (1620) – czarnysalem1 (1750), kurnik, 2011.

6.0–0 f6 7.b5 Ne7 8.c4 g6 9.a4 Bg7 10.Ng5 Nc5 11.Bf3 (11.Nh3!?+=) 11...0–0+= 12.Nh3 Bc8 (12...dc4!? 13.Bb7 Nb7=) 13.cd5 ed5 14.d4 Bh3 15.dc5 Be6 16.c6 Nf5 17.Nc3 Nh4? (better is 17...d4 18.ed4 Nd4+/–) 18.Bd5+– Bd5 19.Qd5 Qd5 20.Nd5 Rac8 (20...Rf7+–) 21.Ne7 Kf7 22.Nc8 Rc8 23.Rfd1 Kg8 24.Rd7 Nf5 25.Rad1 Nd6 26.f3 f5 (26...h6+–) 27.Rg7 Kf8 28.Rh7 Nf7 29.Rd7 (29.Rd7 Kg8 30.Rdf7 Rd8 31.Rfg7 Kf8 32.Rh8) 1–0. elsh1403 – m300d, kurnik, 2011.

6.0–0 Ngf6 7.a3 Be7 8.d4 0–0 9.Nbd2 c5 10.dc5 bc5 11.bc5 Nc5 12.c4 Nce4 13.Ne5 Rc8 14.cd5 Bd5 15.Ne4 Ne4 16.Bf3 Bf6 17.Rc1 Be5 18.Be5 Nc3?? (better is 18...Qg5 19.Bf4 Rc1 20.Qc1 Qg6=) 19.Bc3+– 1–0. bratek55 (1700) – coolj12, kurnik, 2011.

6.0–0 Ngf6 7.b5 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 g6 11.c4 Bg7 12.d4 dc4 13.Bc4 0–0 14.Nc3 Qe7 15.Be2 Rd8 16.Qb3 Ne4 17.Ne4 Be4 18.Bc3 Nf6 19.Bb4 Qd7 20.Ne5 Qc8 21.Nc6 Bc6 22.bc6 Nd5 23.Bf3 Bf8 24.Bd2 Rd6 25.Rc1 Qa8 26.e4 Ne7 27.d5 ed5 28.ed5 Bg7? 29.Bb4+– Bh6 30.Bd6 Bc1 31.Be7 Bg5 32.Bg5 1–0. nizinna – losik18 (1755), kurnik, 2011.

6.0–0 Ngf6 7.b5 c5 8.bc6 Bc6 9.d4 a6 10.c4 Be7 11.cd5 Bd5 12.Nc3 0–0 13.a4 Rc8 14.Nd5 Nd5 15.a5 b5 16.Ba3 N7f6 17.Ne5 Nb4 18.Rb1 Nc6 19.Nc6 Rc6 20.Be7 Qe7 21.B