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TESTD320 Release 2017-06-12
Send your 1.b4 games to me, please. Thank you! /Marek
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(c) Marek Trokenheim

1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1

(...)

7.Ba1 Ne4 8.Nf3 Be7 (better is 8...Nd7!?=) 9.Bg7+/– Rg8 10.Bb2 Ng5 11.g3 Nf3 12.Qf3 c6 (12...h6 13.Bd3 Bd7 14.Bh7+–) 13.c4 (13.Bd3!? h5+–) 13...cb5 14.cb5 Qc7 (14...Nd7 15.Qh5+/–) 15.Qd1 (15.Bd3!? h5+–) 15...Bd7 16.Nc3 Bb4 (16...h6 17.Qc2 Rg6 18.Be2+/–) 17.Qb3 (17.Qh5!? h6 18.Qh6 Bf8+–) 17...Ba5 18.Bg2 Bc3 19.Bc3 (19.Qc3?! Qc3 20.Bc3 Bb5=; 19.dc3?! Qc5 20.Bf1 e5+–) 19...Qb6 20.0–0 (better is 20.Qc2!? Bb5 21.Qh7+–) 20...Qb5+/– 21.Qb5 (21.Qc2!? Rg6 22.Ra1+/–) 21...Bb5+= 22.Rb1 Bc6 23.Bf1 Nd7 24.Bb5 Bb5 25.Rb5 b6 26.Bd4 Ke7 27.Bb6 Nb6 (27...Kd6 28.Ba5+=) 28.Rb6+/– Kf6 29.Kg2 Rc8 30.h4 Rc2 31.d4 Ra2 32.Rb7 h5 33.Rb8 Kg7 34.Rb1 Kg6 35.Kf3 Kf5 36.Re1 f6 37.Re2 (37.Rb1!?+/–) 37...Re2+= 38.Ke2 Kg4 39.Ke1 Kf3 40.Kf1 e5 41.Ke1 ed4 42.ed4 f5 43.Kf1 Ke4 (43...f4 44.gf4 Kf4 45.Ke2=) 44.Ke2 Kd4 45.f3 Ke5 46.Ke3 d4 47.Kd3 f4 48.g4 hg4 49.fg4 f3 50.h5?? (50.g5 Kf5=) 50...Kf6 (better is 50...Kf4 51.h6 f2–+) 51.h6= Kg6 52.g5 Kh7 53.Kd2 Kg6 54.Kd3 Kh7 55.Kd2 ½–½. Hal1958 – Mase, playchess.de, 2004.

7.Ba1 g6

8.c4 dc4 9.Bc4 Bg7 10.Nf3 0–0 11.0–0 c6 12.Nc3 cb5 13.Nb5 Bd7 14.Nbd4 (14.Be5 Nc6 15.d4 Ne5 16.Ne5 Nd5+=) 14...Nc6 15.Bc3 (better is 15.Qb1+=) 15...Ne5?? (15...Nd4 16.Bd4 b5 17.Be2+=) 16.Be2 (better is 16.Ne5 Ne4 17.Nd7 Qd7 18.Qe2+–) 16...Ne4 (16...Nd5 17.Qb3 Qc7 18.Bb2=) 17.Bb4+= Re8 18.Qc2 (18.Ne5 Be5 19.Qb1 Nf6+=) 18...Nf3= 19.Nf3 Bc6 20.d3 Ng5 21.Nd2 h5 (21...Qd5 22.e4 Qb5 23.Rb1+=) 22.Bc3 e5 23.Qb2 f6 (23...Ne6 24.Ra1= (worse is 24.Be5 Qg5 25.Nf3 Bf3 26.Bf3 Be5–/+)) 24.d4 e4 (24...h4 25.de5 fe5 26.Bc4 Ne6 27.e4+= (27.Be5? Qg5 28.e4 h3–+)) 25.Nc4 Kh7 26.Rd1 Qd5? (better is 26...Bd5+/–) 27.Nb6+– Qf5 28.d5 Bd7 (28...Nf3 29.gf3 ef3 30.Bf1+– (30.dc6?! fe2 31.Qe2 bc6+–)) 29.Nd7 Qd7 30.Bb5 (better is 30.h4 Nf7 31.Bb5 Qg4+–) 30...Qe7?? (better is 30...Qg4 31.Ra1 Rd8+/–) 31.Be8 Qe8 32.Bf6 Bf6 (32...Qd7 33.Bg7 Qg7 34.Qb5+–) 33.Qf6 Nf7 34.d6 Qd7 (34...Qg8+–) 35.Qe7 1–0. zabazaba (1720) – all4nc (1715), gameknot.com, 2014.

8.Nf3 Bg7 9.Be2 0–0 10.0–0 Bd7 11.c4 c6 12.cd5 Nd5 13.Bg7 Kg7 14.Nc3 Nc3 15.dc3 c5 16.Qa1 Qb6 17.c4 Kg8 18.Ne5 Qd6? 19.Bf3 Qc7 20.Ng4+– h5?? 21.Nf6 Kg7 22.Nd7 f6 23.Nf8 Kf8 24.Qf6 Kg8 25.Qg6 Kf8 26.Bh5 Nd7 27.Qf7# 1–0. AArow – sunshinelady, ICS game chess.net, 1998.

7.Ba1 Bb4

8.Bb2 c5 9.bc6 bc6 10.Nf3 Qb6 11.Bf6 gf6 12.Be2 Rg8 13.0–0 Nd7 14.d4 e5 15.de5 (better is 15.c3!? Ba5 16.c4+=) 15...fe5=+ 16.c3 Bd6 17.Qd2 e4 18.Nd4 Ne5 19.Qd1? (better is 19.Kh1=+) 19...Bh3–+ 20.Re1? (20.g3 Bf1 21.Kf1–+) 20...Rg2 21.Kh1 Rf2 22.Rg1 (22.Qa4–+) 22...Nd3! (23.Rg8 Kd7 24.Bg4 Ke7 25.Bh3 Rh2 26.Kg1 Nf2 27.Nf5 Kf6 28.Qd4 Qd4 29.Nd4 Nh3 (29...Rh3?! 30.Kf2 c5 31.Nb5 Rh2 32.Rg2 Rg2 33.Kg2–/+) 30.Kf1 Rh1 31.Ke2 Rb1 32.Nc6 Ng1 33.Kf2 Nf3–+) 0–1. valpa – Innessa, HCL–C2549 playchess.de, 2003.

8.Nf3 Nbd7 9.Be2 +=.

8.c4 Nbd7

9.Qb3 A) 9...Bd6 10.Nf3 (10.d4 c5 11.bc6 bc6 12.c5 Bc7 13.Qa4 Bb7 14.Nf3 0–0=; 10.Bf6 Qf6 11.cd5 Nc5 12.Qc2 ed5 13.Nc3 Bf5 14.Qa2 d4+=; 10.cd5 ed5 11.Nf3 0–0 12.Be2 Re8 13.0–0 Nc5 14.Bf6 Nb3+=) 10...Nc5 11.Qc2 0–0 12.Bf6 Qf6 13.d4 Ne4 14.c5 Be7+=; B) 9...Be7 10.Nf3 (10.d4 dc4 11.Bc4 Bd6 12.Nf3 Nb6 13.Bd3 Nbd5 14.0–0 Nb4=; 10.Bf6 Nf6 11.d4 0–0 12.Nf3 dc4 13.Bc4 Qd6 14.0–0 Bd7=; 10.Bc3 Nc5 11.Qc2 Nce4 12.Nf3 Ng4 13.Bg7 Rg8 14.Bd4 Ngf2=) 10...0–0 11.d4 Re8 12.c5 Ng4 13.Bd3 b6 14.c6 Ndf6+=; C) 9...Qe7 10.Be2 (10.Nf3 0–0 11.Bc3 Bd6 12.d4 c5 13.bc6 bc6 14.c5 Bc7=; 10.cd5 ed5 11.Nf3 Nc5 12.Qc2 0–0 13.Be2 Qe4 14.Qa2 Ncd7+=; 10.Bc3 Bc3 11.Nc3 0–0 12.cd5 Nc5 13.Qc4 ed5 14.Nd5 Nd5=) 10...Nc5 11.Qc2 e5 12.cd5 Nd5 13.Nc3 Nb6 14.Nf3 e4=.

9.Bc3 A) 9...Bd6 10.Nf3 (10.d4 dc4 11.Bc4 Nb6 12.Bd3 Nfd5 13.Qc2 Qg5 14.g3 Qh5=; 10.Qf3 dc4 11.Bc4 e5 12.d3 Nc5 13.Qe2 Bf5 14.Nf3 Nd3+=; 10.d3 dc4 11.dc4 e5 12.Nf3 0–0 13.Be2 Qe7 14.0–0 Rd8+=) 10...dc4 11.Bc4 Nb6 12.d3 Nc4 13.dc4 0–0 14.0–0 Qe7=; B) 9...Be7 10.Nf3 (10.d4 0–0 11.Qf3 Ne4 12.Bd3 Nc3 13.Nc3 dc4 14.Be4 Nf6–/+; 10.Qf3 dc4 11.Bc4 Nb6 12.Be2 Nbd5 13.Be5 0–0 14.d4 Bb4+=; 10.d3 0–0 11.Nd2 e5 12.Qf3 c6 13.Be2 Qc7 14.bc6 bc6+=) 10...0–0 11.d4 Ne4 12.Qc2 Ndf6 13.Bd3 Nc3 14.Nc3 c5+=; C) 9...Qe7 10.Qb3 (10.Nf3 0–0 11.Bb4 Qb4 12.cd5 ed5 13.Be2 Nb6 14.0–0 Bf5+=; 10.cd5 ed5 11.Nf3 Bd6 12.Be2 0–0 13.0–0 Re8 14.Nd4 Nb6+=; 10.Qf3 Bc3 11.Nc3 Nb6 12.Qg3 dc4 13.Qg7 Rg8 14.Qh6 e5+=) 10...Bd6 11.d4 c5 12.bc6 bc6 13.Nf3 0–0 14.c5 Bc7=.

9.cd5 ed5 10.Nf3 (10.Be2 0–0 11.Nf3 Re8 12.0–0 Bd6 13.Bd4 c5 14.bc6 bc6+=) 10...0–0 11.Be2 Re8 12.0–0 Qe7 13.Qc2 Bd6 14.Bd4 Kh8 =.

9.Nf3 0–0 10.cd5 (10.Bc3 Qe7 11.Bb4 Qb4 12.cd5 Nd5 13.Qc2 N7f6 14.Be2 Bd7=; 10.Nc3 Nb6 11.cd5 ed5 12.Be2 Re8 13.0–0 Qe7 14.d3 Bd6+=; 10.Qc2 Re8 11.Bc3 Bd6 12.d4 c5 13.bc6 bc6 14.c5 Bc7=) 10...Nd5 11.Nc3 N5f6 12.Qc2 Bd6 13.d4 e5 14.Be2 ed4 =.

9.Nf3 Nb6 10.Bc3 (10.Qb3 Bd6 11.cd5 Nbd5 12.Be5 0–0 13.d4 Bb4 14.Nbd2 Ne4=; 10.cd5 Nbd5 11.Be2 Bd7 12.Be5 0–0 13.Nc3 Bd6 14.0–0 Be5=; 10.Qc2 Nc4 11.Bc4 dc4 12.Qc4 Ba5 13.Bc3 Bb6 14.d3 0–0=) 10...Bd6 11.d3 dc4 12.dc4 Nbd7 13.Bd3 0–0 14.0–0 Nc5 =.

9.Nf3 dc4 10.Qc2 (10.Bc4 Nb6 11.Be2 0–0 12.0–0 Nfd5 13.Bd4 Bd7 14.e4 Nf4=; 10.Bc3 Bd6 11.Bc4 Nb6 12.d3 Nc4 13.dc4 0–0 14.0–0 Qe7=; 10.Qc1 Qe7 11.Qc4 Bd6 12.d4 Nb6 13.Qc2 0–0 14.Bd3 Bd7=) 10...Bd6 11.Bc4 Nb6 12.e4 Bf4 13.0–0 Nc4 14.Qc4 0–0 +=.

9.Nf3 h6 10.Be2 (10.cd5 ed5 11.Be2 Bd6 12.0–0 0–0 13.Bd4 c5 14.bc6 bc6=; 10.Bc3 Qe7 11.Bb4 Qb4 12.cd5 Nd5 13.Qc2 e5 14.Nc3 N5f6=; 10.Nc3 Nb6 11.cd5 ed5 12.Be2 0–0 13.0–0 Bd6 14.Na4 Na4=; 10.Ne5 Bd6 11.Nd7 Bd7 12.cd5 ed5 13.Qf3 Be6 14.Bf6 Qf6=) 10...0–0 (10...dc4 11.Bc4 0–0 12.0–0 Nb6 13.d3 Nc4 14.dc4 Qe7=) 11.0–0 (11.cd5 ed5 12.0–0 Re8 13.Qc2 Bd6 14.Bd4 Qe7=) 11...c6 (11...dc4 12.Bc4 Nb6 13.d3 Nc4 14.dc4 Qe7=) 12.d4 (12.Nc3 Bd6= (12...dc4 13.bc6 bc6 14.Bc4 Bb7=) 13.d4 dc4 14.Bc4 Nb6=; 12.cd5 Nd5 13.Nc3 N7f6 14.Nd5 Nd5+=) 12...Ne4 (12...Qa5 13.Nbd2 (13.Bb2 dc4 14.bc6 bc6=) 13...cb5 A) 14.cd5 Nd5= (14...ed5 15.Qc2+=); B) 14.cb5 Qc7=; 12...cb5 13.Qb3 Qa5 14.cb5 Be7+=) 13.Nbd2 (13.Qa4 Qa5 14.Qa5 Ba5=; 13.Qb3 Qa5 14.Bb2 Nb6+=) 13...Nd2 (13...Qa5!? 14.bc6 Nd2= (14...bc6 15.Ne4 de4+=); 13...cb5 14.cb5 Nd2=) 14.Nd2= Bd2 (14...cb5!? 15.cd5 ed5=) 15.Qd2+/– f5 (15...Nf6 16.f3+/–) 16.Bc3 Nf6 17.f3 g5 (17...dc4 18.Bc4 cb5 19.Bb5+/–) 18.bc6 bc6 19.Ba5 Qd7 20.Bb4 Re8 21.Qb2 (21.Ra1 Bb7+–) 21...Kf7 (21...Ba6!?+=) 22.c5 Bb7 23.Ba5 Ra8 24.Qb6 (24.Bc3 Qc8 25.Ra1 Ba6+/–) 24...Ra6?? (better is 24...Qc8+=) 25.Ba6+– (25.Ba6 Ba6 26.Qa6+–) 1–0. pzn2pawn (1860) – Lukavich, redhotpawn.com, 2016.

8.Nf3 0–0

9.Be2= c5 10.0–0 Nbd7 11.c3 Ba5 12.d3 (12.c4 dc4 13.Bc4 Nb6+=) 12...e5 13.Nbd2 Bc7 (13...Re8 14.c4=) 14.Qc2 Qe7 15.e4 Nb6 Black prepares d4 16.c4 (16.Bb2 Nh5=) 16...d4 17.Bb2 Bg4 (17...Nh5 18.Ra1=) 18.Ra1 Ra8 19.Ra8 Na8 20.h3 (20.Qa4 Nb6 21.Qd1 Qd6=) 20...Be6 21.Nb3 b6 (21...h6 22.Bc1=) 22.Bd1 (22.Bc1 Bd6=) 22...Bd6 23.Nbd2 Nc7 24.Nf1 g6 (24...Nd7 25.Ng3=) 25.Qa4 (25.Bc1 Bd7=) 25...Qd8 (25...Kg7 26.Bc1=) 26.Qa7 (26.Bc1 Nd7=) 26...Nce8 (26...Nd7 27.Bc1=) 27.Bc1 Qb8 28.Qa3 (28.Qa4 Be7=) 28...Ng7 (28...Be7 29.Ng3=) 29.N1h2 (29.Bg5 Nd7=) 29...Qb7 (29...Bc8 30.Bg5 Be7 31.Bh4=) 30.Bg5 Nge8 31.Bh4 Kg7 32.Bg3 Qb8 33.Qc1 Bd7 34.Ne1 Kg8 35.Qh6+= Ng7 36.Nhf3 Ne6= ½–½. Gretencord,Ulrich (1925) – Weidemann,Uwe (1700), DESC, 2001.

9.Be2 Nbd7 10.0–0 c5 11.c4 dc4 12.Bc4 b6 13.Nc3 Bb7 14.d4 cd4 15.Nd4 Ne5 (15...Bc3 16.Bc3 Qc7 17.Nc6 Bc6 18.bc6 Qc6 19.Qd3–/+) 16.Be2 Nd5 (16...Qc7 17.Qb3 Bc5 18.Na4=) 17.Nd5 (17.Ne6!? fe6 18.Nd5 Bd5 19.Be5+/–) 17...Qd5= 18.Nf3 Qd1 19.Rd1 Nf3 20.Bf3 Bf3 21.gf3 Bc5 22.Rd7 f6 23.Kf1 (23.Bd4 Bd4 24.ed4 e5+=) 23...e5 24.Ke2 (24.Ra7!?+=) 24...Ra8–/+ 25.Bc3 Ra2 26.Bd2 Rb2 27.e4 Rb5 28.Be3 (28.f4 ef4 29.Bf4 Rb2 30.Rd2 Rd2 31.Bd2 Kf7–/+) 28...Rb2–+ 29.Ke1? (better is 29.Kd3–+) 29...Be3 30.fe3 Rh2 31.Rb7 Rb2 32.Kd1 (32.Rb8 Kf7–+) 32...h5 33.Ke1 h4 34.Kf1 b5 35.Rb6 b4 36.Rb7 b3 37.Kg1 Rb1 38.Kg2 b2 39.Kh2 Rf1 40.Rb2 Rf3 41.Re2 Kf7 42.Kg2 Rg3 43.Kh2 (43.Kf2 g5–+) 43...Kg6 44.Re1 Kh5 45.Re2 Kg4 46.Re1 Kf3 0–1. cristero (2490) – pushtiu (2245), net–chess.com, 2013.

7.Ba1 b6

8.Nf3 Bb7 9.Be2 Bd6 10.0–0 0–0 11.d4 (11.Ne5 c5=) 11...Nbd7 12.Nbd2 Qe7 (12...c6 13.Ne5 Qc7 A) < 14.Nc6 Bh2 15.Kh1 Bd6–/+ (15...Bc6 16.bc6 Nb8 17.g3+/–); B) 14.f4=) 13.c4 (13.Ne5 Ne4=) 13...Ra8 14.Qc2 Qd8 15.Bc3 15...Ra3 16.Qb2 Ra8 17.Bb4 Qe7 18.Bd6 Qd6 19.Ra1 Qf8 20.h3 Ra1 21.Qa1 Qa8 22.Qc1 Qa4 23.c5+/– bc5 24.dc5 c6 25.Nd4 Ne5 26.b6 Ba6 27.Ba6 Qa6 28.Qc3 Nfd7 29.N2b3 Qd3? 30.Qa5+– Nf3?? 31.Nf3 Qb3 32.Qa8 1–0. Bennett,Hilton (2065) – Stevenson,Michael, All Canterbury Open, New Zealand, 2003.

8.Nf3 Bd7 9.Ne5 Bd6 10.Nd7 Qd7 (10...Nbd7 11.Be2=) 11.c4 Be7 12.Nc3 dc4 13.Bc4 0–0 14.0–0 Rd8 15.d4 Qd6 16.Qf3 Nbd7 17.Rb1 Rb8 18.Ne4 (18.Ne4 Ne4 19.Qe4+=) 1–0. algernon (2265) – mrrook (2405), net–chess.com, 2013.

8.Nf3 Nbd7 9.Be2 =.

8.Nf3 c5

9.c4 Bb7 10.Be2 Bd6 (10...dc4 11.Na3=) 11.0–0 0–0 12.d4 Nbd7 13.Nbd2 (13.cd5 Bd5 14.Nc3 Bb7=) 13...Ne4 (13...cd4 14.Nd4 Qc7 15.f4+=) 14.Ne4= de4 15.Nd2 (15.Ne5 Ne5 16.de5 Bb8=) 15...Nf6 (15...Qc7 16.Qc2+=) 16.Qc2 (16.dc5 Bc5 17.Qc2 Bd6=) 16...Qe7 (16...cd4 17.Bd4 e5 18.Bb2=) 17.dc5+= Bc5 (17...bc5 18.Rb1+=) 18.Bf6 Qf6 19.Ne4 Be4 (19...Qg6 20.Bf3+=) 20.Qe4+/– Rd8 21.Rd1 g6 22.g3 Kg7 (22...Rd1 23.Bd1 Qa1 24.Qd3+/–) 23.Rd8 Qd8 24.Qd3 (24.Bf3!?+/–) 24...Qd3+= 25.Bd3 f5 26.e4 (26.Bf1 e5+=) 26...Kf6 27.Kg2 h6 28.h4 g5 29.f4+/– fe4 30.Be4 e5 31.hg5 hg5+= 32.fg5 Kg5 33.Kf3 Bd4 34.g4 Bc5 35.Bf5 Kf6+= 36.Ke4 Bd4 37.Kd5 Bc5 38.Bc8 Be3 39.Bd7 Bf4? 40.Bc8?? Be3+/– 41.Ke4 Bd4+= 42.Bf5 Kg5 43.c5 Bc5 ½–½. Schwichtenberg,Juergen – Luebbers,Doris, Hessen–ch Seniors, 2004.

9.c4 dc4 10.Bc4 Bb7 11.0–0 Be7 12.Nc3 Bf3 (12...0–0 13.Qe2=) 13.Qf3+= 0–0 (13...Qd2?? 14.Rd1 Qc2 15.Bd3+–) 14.Rd1 Qc7 15.Ne4 Nbd7 16.Bd3 Nd5 17.Qh3 f5 18.Bc4 N7f6?? (18...Rf7 19.Nc3 N7f6 20.Qf3+=) 19.Nf6?? (better is 19.Ng5 Re8 20.Bf6 Bf6 21.Qh7 Kf8 22.Ne6 Re6 23.Bd5+–) 19...Bf6+/– 20.Bf6 Rf6 21.Qf3 Ne7 22.Ra1 g6 (22...Rh6 23.Qa8 Kf7 24.h3+/–) 23.Qa8 Kg7?? (better is 23...Rf8 24.Be6 Kg7+/–) 24.Ra7+– Qd6 25.Qe8 Rf7 26.Rd7 Qe5 27.Re7 Qf6 (27...Re7 28.Qe7 Kh6 29.f4+–) 28.Rf7 Qf7 29.Qe6 (29.Qb8 Qe7+–) 29...Qe6 30.Be6 Kf6 31.Bc4 Ke5 32.f3 (32.f4 Kf6+–) 32...h6 (32...g5 33.g3 g4 34.f4 Kf6 35.d4 cd4 36.ed4+–) 33.Kf2 g5 34.g3 f4 35.g4 Kf6 36.Ke2 Kg6 (36...Ke5 37.Kd3 Kf6 38.Ke4+–) 37.d4 (better is 37.ef4 gf4 38.Kd3+–) 37...fe3 (37...cd4 38.ed4 Kg7+–) 38.dc5 bc5 39.b6 1–0. forsetinn (1630) – kenny529, gameknot.com, 2013.

9.bc6 Nc6 10.Ne5 Ne5 11.Be5 Be7 =.

7.Ba1 c5

8.Nc3 c4 9.d4? (better is 9.Nf3=) 9...Bb4–+ 10.g3? (10.Nge2 Qa5 11.f3 Qb5–+) 10...Bd7 (better is 10...Qa5–+) 11.Qb1 Qa5 12.Qb2 Ne4 13.Qc1?? (better is 13.Nge2–+) 13...Bb5 14.Nge2 Nc6 (14...Nc3 15.Bc3 Bc3 16.Nc3 Qc3 17.Qd2 Qa1 18.Qd1–+) 15.Bg2 (15.Qb2–+) 15...Bc3 16.Nc3 Nc3 17.0–0 (17.Bc3 Qc3 18.Qd2 Qa1 19.Qd1 Qa5 20.Ke2 c3 21.Kf3–+) 17...Ne2 18.Kh1 Nc1 19.Rc1 Qd2 (19...Qd2 20.Bb2 Nb4–+) 0–1. swindon – beatroot, gameknot.com, 2008.

8.Nc3 e5 +=.

8.c4 Qa5 9.Nc3 Ne4 10.Ne4 de4 11.f3 Nd7 (11...ef3!? 12.Nf3 f6+=) 12.fe4+/– Bd6 (12...e5!?+/–) 13.Bg7+– Rg8 14.Bc3 Qc7 15.Qh5 Bg3?? (15...Nf8+–) 16.hg3 Kf8 (16...Qg3 17.Kd1+–) 17.Ne2 Nb6 (17...e5 18.Qh6 Ke7 19.Rh5+–) 18.Qh7 e5 19.Nf4 Bg4 (19...Qd8 20.Rh5 Nd7 21.Qh6 Ke8 22.Nd5+–) 20.Be2 Be2 (20...Bc8+–) 21.Ne6! Ke7 (21...fe6 22.Qh6 Double attack (22.Qc7 Pinning; 22.Qc7 Deflection; 22.Qh6 Decoy; 22.Ke2 Zwischenzug)) 22.Nc7 Bc4 23.Qg8 1–0. marekt – 488, ChessWorld.net, 2012.

8.bc6 Nc6 9.f4 (9.Nf3 Bd6=) 9...Bc5=+ 10.Nf3 d4 (10...0–0 11.Be2=+) 11.Nd4 (11.ed4 Bd4 12.Nd4 Nd4=) 11...Nd4 12.ed4 Bd4 13.Bb5 Bd7 14.Bd4 Bb5 (15.Be5 Qd5=+). Dzuris,Ivan – Zerbe,Klaus, corr, 1970.

8.d4 c4.

8.Be2 Be7 9.f4 0–0 10.Nf3 Nbd7 11.0–0 b6 12.Qe1 Bb7 13.Bb2 Qc7 14.Ne5 c4 15.d3 cd3 16.cd3 Nc5 17.Qg3 Na4 18.Rc1 Qb8? (better is 18...Qd6 19.Bd4 Nc5+=) 19.Nd7!+– Qd8 (19...Nd7 20.Qg7) 20.Bf6 (20.Nf8?! Nb2 21.Nh7 Nh7=) 20...Bf6 21.Nf8 Kf8 22.d4 Nb2 23.Nd2 Nc4 24.Nc4 dc4 25.Bc4 Bd5 (25...Qe7+–) 26.Bd5 Qd5 27.Rc8 Ke7 28.Qf3 Qb5 (28...Kd7 29.Rf8 Qf3 30.gf3 Ke7+–) 29.Qb7 Kd6 30.Qb8 Kd5 31.Rc5!! (31...Qc5 32.dc5 bc5 33.Qb7 Kc4 34.Qf7+–) 1–0. miehnekort – ar_shtein, Yahoo, 2005.

8.Nf3 Bd7 9.c4 dc4 10.Bc4 Qa5 11.Bc3 Qb6 12.Qb3 Bd6 13.d4 Ne4 14.dc5 Nc5 15.Bd4 Qa5 16.Qc3 Qc3 17.Nc3 0–0 18.0–0 Rc8 19.Ra1 Be8 20.Ra7 b6 21.Nd2 Nbd7 22.Nb3? (22.g3) 22...e5 23.Bc5 Bc5 24.Nc5 Rc5 25.Ra4 g6 26.g3 Kg7 27.Kg2 1–0. Figiel,Rafal – Lipko,K, casual (Figiel), 2001.

8.c4 b6

9.Qa4 Bd6 10.Nf3 Nbd7 11.Be2 0–0 12.0–0 Qc7 13.Qc2 Bb7 14.d4 dc4 15.Nbd2 (15.dc5 Qc5 16.Qc4 Qh5+=) 15...c3 (15...cd4!? 16.Qc4 de3 17.fe3 Bd5 18.Qc7 Bc7–/+) 16.Qc3+= Ne4?? (better is 16...Rc8+=) 17.Ne4+– Be4 18.dc5 Bh2 19.Nh2 e5 (19...f6 20.cb6 Qb6+–) 20.c6 Nc5 21.Qe5 Qe5 22.Be5 Nd3 (22...Ra8 23.Bc7 Na4 24.Ra1+–) 23.Bc7 Nb4 24.Bd6 1–0. Chulia Sanmartin,Miguel (1865) – Rovira Agusti,Guillem (1760), Valencia Provincial South, 2004.

9.Nf3 dc4 10.Bc4 Bb7 11.Be5 Bd6 12.Bd6 Qd6 13.0–0 Ng4 14.g3 Nd7 15.h3 (better is 15.d4!?+=) 15...Ne3!–/+ 16.de3 (16.de3 Qd1 Combination; 16.fe3 Qg3 Double attack) 16...Qd1 17.Rd1 Bf3 18.Rd6 (18.Rc1!?–/+) 18...Ke7–+ 19.Rd2 Ne5 20.Be2 Be2 21.Re2 Ra8 22.Nc3 Ra3 23.Ne4 f5 24.Ng5 (24.Nd2 Ra5–+) 24...h6 25.f4 Nc4 26.Nf3 Ne3 27.Kf2 Nd1 28.Kg2 1–0. tightfist (2500) – splinterjuice (2605), net–chess.com, 2013.

9.Nf3 Bd6 10.Be2 Nbd7 11.Nc3 Bb7 12.0–0 0–0 13.Bb2 Qc7 14.h3 Rd8 15.d3 Nf8 16.Qc2 Ng6 17.Ra1 Qe7 18.cd5 ed5 19.d4 Ne4 20.Ne4 de4 21.Nd2 Bb8 22.dc5 bc5 (worse is 22...Qc5 23.Qc5 bc5 24.Nb3+/–) 23.Nf1 Qg5 24.Rd1 Re8 25.Bg4 Nh4 26.Qc4 Qg6? (26...Bc8 27.Rd5 Qg6 28.Qc5 f5+/–) 27.Qc5+– f5 28.Rd7 Bc8? (28...fg4 29.Rb7 Nf5 30.hg4 Qg4 31.Qd5 Kh8+–) 29.Rg7 Qg7 30.Bg7 fg4 (30...Kg7 31.Qc6 Rg8 32.Be2+–) 31.Bf6 (better is 31.Qc6 Kf7 32.Bc3 Be6 33.Qb7 Re7 34.Qb8 Ng6+–) 31...Ng6 32.hg4 Bg4 33.Qc6 Kf7 34.Bd4 Re7 35.f3 ef3 36.gf3 Be6 37.b6 Bd7 38.Qf6 Ke8 39.f4 Rf7 40.Qg5 Nf8 41.Ng3 Ne6 42.Qg8 Rf8 43.Qh7 Nd4 44.ed4 Bf4 45.Qh5 Kd8 46.Qf3 Ke7 47.Qe4 Kd8 48.Ne2 Bd6 49.Nc3 Rg8= 50.Kf2 Rf8 ½–½. Khrustalev,Alexsander (2000) – Sidorov,Kirill (2025), Moscow Petrosian Memorial U18, 2008.

9.Nf3= Bb7

10.d3 Bd6 =+.

10.d4 Bd6 =.

10.Be2 dc4 11.Bc4 Be7 12.d4 =.

10.Be2 Bd6 11.0–0 =.

10.Be2 Nbd7 11.0–0 Bd6 12.d4 0–0 13.Nbd2 Qc7 14.Qb3 (14.Bd3 Ra8=) 14...Ne4 (14...cd4 15.Bd4 e5 16.Bc3–/+) 15.g3 (15.Rd1 cd4 16.Bd4 Ndc5=) 15...Ndf6 (15...dc4 16.Bc4 Nd2 17.Nd2=+) 16.Bd3 (16.Ne4 Ne4 17.Qb2 f6=+) 16...Nd2 (16...dc4 17.Qc4 Bd5 18.Qc2 Nd2 19.Nd2=) 17.Nd2 ½–½. Schwichtenberg,Juergen – Neudel,Bernd, GER–ch Seniors, 2001.

10.Be2 Nbd7 11.d3 Bd6 12.0–0 0–0 13.Nbd2 Qc7 14.Qc2 Ra8 15.h3 (15.cd5 Bd5 16.e4 Bb7=) 15...Ne5 (15...e5 16.e4 d4 17.Bb2=+) 16.Rc1= Ned7 (16...Nf3 17.Bf3 e5 18.cd5 Bd5 19.Bd5 Nd5 20.Qc4=) 17.Bc3 (17.Rf1 e5=+) 17...e5 18.cd5 (18.Ra1 Ra1 19.Ba1 e4=) 18...Nd5=+ 19.Nc4 Nc3 20.Qc3 Ra2 21.Bd1 Ra8 (21...h6 22.Bb3 Ra7 23.Nh4=) 22.Ra1 (22.Nfd2 Ra7=) 22...Ra1 23.Qa1 g6 (23...Bd5 24.e4 Bb7 25.Bb3=) 24.Nfd2+= h6 25.Bf3 Bf3 26.Nf3 Qc8?? (26...Qb8!?+=) 27.d4 (better is 27.Nd6!? Qb8 28.Nc4 f6+–) 27...ed4? (better is 27...Bc7 28.de5 Qb8+/–) 28.ed4?? (better is 28.Nd6 Qf8 29.Nc4 de3 30.Ne3+–) 28...Be7 (28...Bf8 29.Qa6 Qe8 30.Nb6 cd4 31.Nd7 (31.Nd4?? Qe1 32.Kh2 Bd6 33.g3 Qf2 34.Kh1 Nb6–+) 31...Qd7 32.Qc6+=) 29.Qe1 (29.d5 Qd8+=) 29...Bf6 (29...Bf8 30.Qe4=) 30.d5 Qa8 31.Qd1 (31.d6 Kg7 32.Qd1 Qe4=) 31…Qa2 (32.Qd3 Qa1 33.Qf1 Qc3=). Garcia,Mario – Tosti,Ricardo R, CAPA III Copa Arg. Gr.3, 1996.

10.Be2 Nbd7 11.cd5!? ed5 12.0–0 =.

10.Be2 Nbd7 11.Ne5 Ne5–/+ 12.Be5 Bd6 (12...dc4 13.f3=+) 13.Bd6 Qd6 14.0–0 0–0 15.Bf3 Ra8 16.Nc3 Ne4 17.g3 (17.cd5 ed5 18.Qc2 Ng5=+) 17...f5 18.Qc2 Ra5 (18...dc4 19.Ne4 Be4 20.Be4 fe4 21.Qe4=+) 19.Rd1 (19.cd5 ed5 20.Rb1 Qd7=+) 19...Qb8 (19...dc4!? 20.Bg2 Bd5–/+) 20.Be4 fe4 21.Qb3 (21.d3!? ed3 22.Qd3=) 21...Qa8–/+ 22.Ne2 Qe8 23.Nc3 Qf7–/+ 24.Na4 dc4 25.Qc4 Bd5 26.Qc2 Rb5 27.Rb1 Bc6 28.Nb6 Rb1= 29.Qb1 Qb7 30.Qb2 Qa6 31.Qb3 Kf7 32.Nc4 Qa1 33.Kg2 Bd5 34.Qb2 Qb2=+ 35.Nb2 Bb3 36.f3= Bd5 37.fe4 Be4 38.Kf2 Bc6 39.Nd3+/– Ke7 40.Nc5 Kd6 41.d4 Kd5 42.Nd3 Ke4 43.Nc5 Kd5+/– 44.Nd3 Ke4+– 45.Ne5 Be8 46.Nf3 h6 47.h4 Bh5 48.Ne5+– Be8 49.g4 Ba4 50.Nf7 Bc6 51.h5 Bd7 52.Ne5 Bb5 53.Ng6 Bd7 54.Ke2 Bb5 55.Kd2 Kf3 56.Ne5 Ke4 57.Nf7+/– Bd7 58.Ke2 Bb5= 59.Kf2 Bd7 60.Ne5 Bb5 61.Nf3 Ba4 62.Nd2 Kd3 63.Nf3 Ke4 64.Ng1 e5 65.Ne2 ed4= 66.Nd4 Bd7 67.Kg3 Ke3 68.Nb3 Be6 69.Nc5 Bc8 70.Kh4 Kd4 71.Nb3 Ke5 ½–½. Bulcourf,Carlos – Foguelman, Buenos Aires, 1978.

10.Be2 Be7 11.0–0 0–0 (11...dc4 12.Bc4 0–0 13.d4=) 12.d4 (12.d3 Bd6=) 12...Nbd7 (12...dc4 13.Bc4 Bd5 14.Nbd2=) 13.Nbd2 Qc7 14.Qb3 (14.Bd3 dc4 15.Nc4 Bd5=) 14...Ra8 15.Bb2 h6 (15...cd4 16.Bd4 e5 17.Bb2=+) 16.Ra1 (16.Rc1 dc4 17.Qc4 Bd5=) 16...Qc8 (16...Ra1 17.Ba1 cd4 18.Bd4=) 17.Ra4 (17.Ra8 Qa8 18.Ba3 dc4 19.Nc4 Bd5=) 17...Ra4 (17...dc4 18.Qc4 (< 18.Rc4 Bd5–/+) 18...Bd5 19.Ra8 Qa8 20.Qc2=) 18.Qa4 Qa8 (18...cd4 19.Bd4 Nc5 20.Qd1=) 19.Qa8+= Ba8 20.Ne5 (20.Kf1 dc4 21.dc5 c3 22.Bc3 Bc5=) 20...Ne5 21.de5 Nd7 22.f4 f6 23.Bg4 Kf7 24.cd5 Bd5 25.e4 Ba2 26.ef6 gf6 27.Bh5 Kf8 28.Be2 Kf7 29.Bc4 Bc4 30.Nc4 Bd8 31.Kf2+= Nf8 32.f5 Bc7+= 33.g4 ef5 34.ef5 Nd7 35.h3 Kg7 36.Kf3 Ne5? (better is 36...Be5=) ½–½. Melich,Jindrich (2190) – Zvara,Tomas, CZE–chT1b Czechia, 1995.

8.c4 d4?!

9.ed4 cd4 10.Nf3 Bc5 11.Qc2 0–0 12.Be2 Qd6 13.0–0 e5 14.d3 Ng4 15.h3 Nh6 16.Nbd2 f5 17.Bb2 Nd7 18.Rc1 b6 19.Qb3 Bb7 Black intends e4 20.Qc2 Re8 Black plans e4 21.Re1 Nf6 Black prepares the advance e4 22.Ng5 e4 23.de4? (better is 23.Nb3+=) 23...fe4–+ (worse is 23...Ne4 24.Bd3+/–) 24.Bg4? (better is 24.Bd3 ed3 25.Re8 Ne8 26.Qd3–+) 24...Nhg4 25.hg4 Qf4 Black prepares the advance e3 (25...d3 26.Qd1 Qg3 27.Kh1 Bf2 28.Bf6 Be1 29.c5 Qh4 30.Nh3 gf6 31.c6 Bd2 32.Qd2–+) 26.Nh3 Qg4 27.Nf1 e3 (27...e3 28.fe3 d3–+) 0–1. Barczi,Tibor (1685) – Kukel,Imre (2010), Dunajska Streda op, 1999.

9.ed4 cd4 10.Nf3 Bc5 11.d3 0–0 12.Nbd2 Re8 13.Be2 e5 14.0–0 Bg4 15.h3 Bh5 16.Ne1 Be2 17.Qe2 Qa5 18.Nc2 Nbd7 19.Nb3 Qb6 20.Nc5 Nc5 21.Bb2 Na4 22.Bc1 Nc3 23.Qe1 e4 24.de4 Re4 25.Qd2 Ne2 26.Kh1 Nc1 27.Rc1 Qc5 28.Qd3 Qe5 29.g3 Nd7 30.Rd1 Nc5=+ 31.Qd2 d3 32.Ne1 Re2 33.Qa5 h5 34.Nd3 Nd3? 35.Qd8+/– Qe8 36.Qe8 Re8 37.Rd3 Rc8 38.Rc3 b6 39.Kg2 f6 40.f4 Kf7 41.Kf3 f5 42.g4 fg4 43.hg4 Rc5 44.g5 g6 45.Ke4 Ke6 46.Rc2 Rf5 47.Rc3 Rc5= ½–½. valpa – ulibear, HCL–C2517 playchess.de, 2004.

9.Nf3! de3 10.fe3 +=.

8.c4 Bd6

9.Nf3 0–0 10.d3 Nbd7 11.Nbd2 b6 12.Be2 Bb7 13.Qc2 Qc7 14.h3 e5 15.e4 d4 16.Bb2 Nh5 17.Ne5 Ne5 18.Bh5 Qe7 19.Be2 Qg5 20.g4 f5 21.Nf3 Nf3 22.Bf3 fe4 23.Be4 Be4 24.de4 Qf4 25.Qe2 Be5 26.Rg1 Qh2 27.Qf1 Rf3 28.Bc1 Qh3 29.Qh3 Rh3 30.f4 Bc7 31.Bd2 Kf7 32.Kf2 Ra3 33.Ke2 Ra4 34.Rc1 Ra2 35.Rf1 Ra4 36.e5 Ra3 37.Rf3 Rf3 38.Kf3 g5 39.f5 Be5 40.Bg5 Kg7 41.Ke4 Bf6 42.Bf4 Bd8 43.g5 Kf7 44.Kd5 Ke7 45.Kc6 Kf7 46.Kd7 Be7 47.Kc7 1–0. Mroz – Guziec, corr AMM PL 1990–92.

9.Nf3 0–0 10.d3 Re8 11.Be2 dc4 12.dc4 e5 13.Ne5 Qa5 14.Bc3 Qc7 15.Nf3 Ne4 16.0–0 Bg4 17.h3 1–0. Bivens – Helgesen, corr 3GMM–25 1994–95.

9.Nf3 0–0 10.Be2 Nbd7 11.0–0 dc4 12.Bc4 Nb6 13.Be2 Bd7 14.Qc2 Nfd5 15.Rc1 Qc7 16.Nc3 c4 17.Ne4 Rc8 18.Nd6 Qd6 19.Ng5 f5 20.Bf3 Qe7 21.Bd5 Nd5 22.Nf3 Bb5 23.Qb2 Be8 24.Qd4 b5 25.d3 c3 26.Qe5 b4 27.e4 fe4 28.de4 Nf6 29.Nd4 Rc5 0–1. Scherbeijn – van der Kemp, corr 1995.

9.Nf3 Nbd7 (--> 8.Nf3 Nbd7 9.c4 Bd6).

8.c4 Nbd7

9.d3 e5 10.Nf3 d4 11.Be2= Bd6 12.e4 (12.0–0 0–0=) 12...g6 (12...Qa5 13.Nbd2=+) 13.Bb2 (13.0–0 0–0=) 13...Nh5 (13...Qa5 14.Qd2 Qd2 15.Nbd2=) 14.Bc1 Nf4 15.g3 (15.Bf4 ef4 16.0–0 0–0=) 15...Ne6 (15...Ne2 16.Qe2 Qf6 17.Bg5=+) 16.0–0 g5 (16...Qf6 17.Bh6=) 17.Ne1 (17.h3 Qf6=) 17...h5 (17...Qf6 18.Nf3=+) 18.Bh5= Nf6 19.Be2 (19.Bf3 Qc7=) 19...Ke7 (19...Qc7 20.Nd2=) 20.f3 (20.Nd2 Ke8+=) 20...Qg8 21.Rf2 Nh5 22.Bf1 Qh7 23.Bg2 Ng3 24.hg3 Qh2 25.Kf1 Qg3 26.Qa4 Nf8 27.Qa8 Ng6 28.Na3 Nh4 29.Ke2+/– f6 30.b6 g4 31.Nb5?? Ng2+= 32.Nd6 Kd6–/+ 33.Qb8 Ke6 34.f4 Ne1–+ 35.f5 Ke7 36.Qc7 Bd7 37.Qc5 Ke8 38.Qa3 Rh1 39.Qa8 Kf7 (40.Qf8 Kf8 41.Bh6 Ke7 42.Bf8 Kf8 43.Kd1 Qf2 44.c5 Nd3#) 0–1. Struck,Bernd Dieter – Breustedt,Werner (2240), GER–ch Seniors, 2001.

9.d3 e5 10.Nf3 Bd6 11.Be2 =+.

9.d4 Nb6 10.cd5 ed5 11.dc5 Bc5 =.

9.Nf3 Qa5 10.Bc3 Qa2 11.cd5 Nd5 (11...ed5 12.Bd3+=) 12.Be2 Nc3 (12...f6!?+=) 13.Nc3= Qa5 14.0–0 Be7 15.Qb3 0–0 16.d4 (16.Rc1 b6=) 16...b6 (16...cd4 17.Nd4 Nf6 18.f4=) 17.d5 (17.Bc4 Bf6 18.Ne4 Bb7 19.Nf6 gf6+=) 17...Nf6 18.Bc4 ed5 19.Nd5 Nd5 20.Bd5 Bf6 21.e4 Qc3 22.Qa2 Bg4 23.Nd2 (23.Qe2+=) 23...Bd8 (better is 23...Be2!? 24.Rb1 Bd3+=) 24.Nc4= Bc7 25.Qa7 Bh2?? (better is 25...Bd8+=) 26.Kh2+– Be2 27.Ra1 Qf6 (27...g6 28.Nb6 Bb5 29.Ra2+–) 28.Kg1 (28.Nb6?! Qf2 29.Qc7 Bb5+–) 28...h6 (28...Bc4 29.Bc4 h5+–) 29.Re1 (better is 29.Nb6 Bb5 30.Rc1+–) 29...Bc4= 30.e5 Qf4 31.Qa4 (31.Bc4 Qc4 32.Qb6 Qb4=) 31...Qd2= 32.Rd1 Qd5? (better is 32...Bb5 33.Bf7 A) worse is 33...Rf7 34.Qa8 (34.Rd2?? Ba4 35.e6 Rf8–+) 34...Rf8 35.Qf8 (35.Rd2 Ra8 36.Rd6 Ba4–+) 35...Kf8 36.Rd2+–; B) 33...Kh8 34.Rd2 Ba4=) 33.Rd5+– Bd5 34.Qa7 Rd8?? (better is 34...Rc8 35.Qb6 c4+–) 35.Qb6+– Rc8 (35...Rd7 36.Qb8 Kh7 37.Qd6 Rd6 38.ed6+–) 36.Qa6 (36.Qd6 Bc4 37.b6 Ba6+–) 36...Ra8 (36...Re8 37.Qd6 Ba8 38.Qc5+–) 37.Qd6 Be6 (37...Bb7 38.Qc5 Re8 39.Qc7+–) 38.Qc5 Rc8 39.Qd6 Rc1 40.Kh2 Rc2 (40...h5+–) 41.b6 (41.b6 Rb2 42.Qc7+–) 1–0. Tagirov,Kajum K (1865) – Mullabaev,Kamil, Roschinsky Open, 2010.

9.Nf3 Nb6 10.Na3 Bd6 11.Bc3 (11.Bd3 0–0=) 11...d4=+ (Black fights for the Initiative) 12.Ba5 (12.Bb2 e5 13.d3 0–0=+) 12...e5 13.ed4 (13.d3!?=+) 13...e4–/+ 14.Ng1 (14.Ng5 h6 15.Ne4 Ne4–/+) 14...cd4 15.Qa1 (15.Nb1 d3 16.Nc3 Bc5–+) 15...Bc5–+ 16.d3 Qe7 17.de4?? (better is 17.Kd1–+) 17...Ne4 (17...Ba3?! 18.f3 Qc5 19.Bb6 Bb4 20.Kf2 Qb6 21.Bd3–+; 17...Qe4?! 18.Kd1–+) 18.Bb6 (18.Bd3 Ng3 19.Ne2 Bb4 (19...Ba3 20.hg3 Bc5 21.Kf1+=) 20.Bb4 Qb4 21.Kd1 Nh1 22.Nd4 Nf2 23.Ke2 Nd3 24.Kd3 0–0–+) 18...Bb6 19.Nc2 Ng3 20.Be2 Nh1 21.Nd4 Qh4 22.Ngf3 Qf2 23.Kd2 0–0 24.Qh1 Bd4 (25.Qg1 Be3 26.Kc3 Qe2–+) 0–1. marus – Siget, internet, 2001.

9.Nf3 Nb6 10.Qc2 dc4 11.Bc4 Nc4 12.Qc4 Qd5 13.Qa4 Qe4 14.Nc3 Qa4 15.Na4 Bd7 16.Nc3 (16.Bf6 gf6 17.Nc3 e5=) 16...Bd6+= 17.0–0 0–0 18.d4 c4 19.h3 Nd5 20.Rb1 Ra8 21.g3 (better is 21.Bb2!?–/+) 21...Ra1!–+ 22.Ra1 Nc3 23.Ra8 Bf8 24.Rb8 (better is 24.b6 Bb5 25.Ra7–+) 24...Bb5 (24...Nb5?! 25.Ne5 Bc6 26.Nc4+=) 25.Ne5 (25.Rb7 Bc6 26.Rf7 Kf7 27.Ne5 Kf6 28.Nc6–+) 25…f6 (25...f6 26.Nf3 Ne2 27.Kh2 Bc6–+) 0–1. Nemeth,Laszlo1 (1975) – Halasz,Ferenc (2110), HUN–chT2 Erkel, 2007.

9.Nf3 Nb6 10.d3 Bd6 =.

9.Nf3 Bd6

10.Qb3 0–0 11.Be2 dc4 12.Bc4 Qe7 13.0–0 b6 14.Na3 Bb7 15.Be2 Bc7 16.h3 e5 17.d3 e4 18.de4 Ne4 19.Nc4 Kh8 20.Rd1 f5 21.Qb2 f4 (better is 21...Rg8=) 22.Qg7!+– Qg7 23.Bg7 Kg7 24.Rd7 Rf7 25.Rf7 Kf7 26.ef4 Bf4 27.Nb6 Ke7 28.Nc4 (better is 28.Na4!?+–) 28...Nc3+/– 29.Bd3 Bf3 30.gf3 Nb5 31.Nb6 Nc7 32.Bh7 Kd6 33.Be4 Ke5 34.Kf1 Kd4 35.Ke2 c4 36.Kd1 Nb5 37.Nd5 Nc3 38.Nc3 Kc3 39.Ke2 (better is 39.Bd5!?+–) 39...Kd4 40.h4 Ke5 41.h5 Bh6 42.Kd1 Kf4 43.Kd2 Bg7 44.h6 Bh6 45.Kc3 Bg5 ½–½. Kalanyos,Ferenc (2000) – Horvath,Janos (2125), HUN–chT2 Asztalos, 2007.

10.d4 =.

10.Be2 0–0 11.0–0 dc4 12.Bc4 e5 13.d3 Nb6 (Better is 13...Qe7!?=+) 14.Be5+= ½–½. Nemeth,Laszlo – Szoboszlai,Zita, Cseppko op–A, 2002,

10.Be2 0–0 11.0–0 Qc7 12.Nc3 Nb6 13.d3 e5 14.e4 d4 15.Nd5 Nfd5 16.ed5 f5 17.h3 Qe7 18.Re1 Re8 19.Bb2 Bc7 20.Bc1 Qd6! 0–1 (56.). Karker – Weiss, corr Dyckhoff 1954.

10.Be2 dc4 11.Bc4 b6 12.0–0 Bb7 13.d3 Qa8 14.Nbd2 g5 (14...0–0 15.Qb3 Qe8 16.Bc3=) 15.e4 (15.Ne4!? Be4 16.de4+=) 15...g4= 16.Ne1 Qb8 17.g3 h5 18.Ng2 Be5 19.f4 gf3 20.Nf3 Ba1 21.Qa1 Ke7 22.Qc1 Rg8 23.Qf4 Qf4 24.gf4 Ne8 25.Kf2 Nd6 26.Ne3 Ra8 27.Rb1 Ra4 28.Nd2 Nc4 (28...e5 29.Kg3+=) 29.Nec4= Ra8 30.Rg1 Rh8 (30...Ra4 31.Ke3+=) 31.Nf3+/– Ra8 32.Ke3 Ra4 (32...Ra2!?+/–) 33.Nfe5+– Ne5 34.fe5 Be4 35.Ke4 Rb4 36.Rg7 Kf8 37.Rh7 Kg8 38.Rh5 Rb5 39.Rg5 Kf8 40.Ke3 Rb4 41.Rg2 b5 42.Nd6 Rb3 43.Ne4 c4 44.Nc5 Ra3 45.Rb2 cd3 46.Nd3 Ra5 47.Rb4 Kg7 48.Rg4 Kh7 49.Rf4 Kg7 50.h4 Ra4 51.Nb4 Kg6 52.Kd3 Ra1 53.Nc6 Rd1 54.Kc3?? Kg7?? 55.Nb4 Kg6 56.Nd3 Kh5 57.Nf2 Rb1 58.Rf7 Kh4 59.Rf6 b4 60.Kc2 (60.Kc2 Ra1 61.Nd3 Ra2 62.Kb3 Ra3 63.Kc4+– (63.Kb4?! Rd3 64.Kc4 Ra3+–)) 1–0. Struck,Bernd Dieter (1980) – Daum,Dieter (2135), GER–ch Seniors, 2003.

10.Nc3 0–0

11.d3 Qb6 =+.

11.cd5 ed5 12.Be2 Nb6 =+.

11.cd5 ed5 12.Be2 Re8 =+.

11.Be2 Nb6 12.Qb3 Qc7 (12...dc4 13.Bc4 Nc4 14.Qc4–/+) 13.Na4 (13.d3 Qe7=) 13...Na4 14.Qa4 e5 15.cd5 Nd5 16.Qh4 (16.Qe4 Nf6 17.Qa4 b6+=) 16...Nf6 (16...Bf5 17.0–0+=) 17.h3 Re8 Black prepares e4 18.Ng5 (18.0–0 h6 19.e4 Qa5–/+) 18...h6 (18...Bf5!? 19.Qa4 h6+=) 19.Ne4= Ne4 20.Qe4 f5 21.Qc2 e4 22.Bh5 Re7 (22...Rf8 23.Qa2 Kh7 24.0–0=) 23.0–0= Qa5 24.Qc3 (better is 24.Be2=) 24...Qb5–/+ 25.Bg6 c4 26.Rc1 Be6 27.Bb2 Rc7 (27...Bb4!? 28.Qc2 Qc6–/+) 28.Ra1+= Bf8 29.Ra5 Qd7 30.Qe5 Rc8 31.Bf5 Bf5 32.Qf5 Qf5 33.Rf5 Rc5 34.Rf8+/– Kf8 35.Ba3 b6 36.Bc5 bc5 37.h4 Ke7 38.Kf1 Ke6 39.Ke2 Kf5 40.f3 g5 41.g4?? Ke5–/+ 42.h5?? ef3–+ 43.Kf3 Kd5 44.Kf2 c3 45.dc3 Ke4 46.c4 Kd3 47.Kf3 Kc4 48.Ke4 Kb4 49.Kd3 Kb3 50.Kd2 c4 51.e4 Kb2 0–1. Kleine,P (1870) – Gonzalez Garcia,G (2215), III Montalvo Mem, Gran Canaria ESP, 2010.

11.Be2 Nb6 12.d3= dc4 13.dc4 Qe7 (13...e5 14.0–0=) 14.Qc2 (14.0–0 e5=) 14...e5 15.Nd2 Bg4 16.f3 Bh5 (16...Be6 17.0–0=) 17.0–0 Bb8 (17...Bg6 18.e4=) 18.Rd1 Ba7 (18...Bg6 19.e4=) 19.e4 (19.Bd3 Rd8+=) 19...Qd6 (19...Bg6 20.Bd3+=) 20.Nf1 Qc7 21.Ne3 Bg6 22.Ncd5 Nbd5 23.Nd5 Nd5 24.Rd5 f6 25.Qd2 Bf7 26.Rd7 Qb8? 27.Qa5+– Qc8 28.Rf7! Rf7 29.Qa7 Rd7 30.Bc3 Rd8 31.Ba5 Qa8 32.Qa8 Ra8 33.Bb6 Rc8 34.Bf1 g5 35.g3 Kf7 36.Bh3 Ra8 37.Bc5 Ra4 38.Bf1 h5 39.Kf2 (39...Ra2 40.Be2+–) 1–0. Kreuzer,Uwe – Mephisto MM4, 1989.

11.Be2 Nb6 12.d3= Qc7 13.Na4 =.

11.Be2 dc4 12.Bc4 Nb6 13.Be2 e5 14.Qc2 Bg4 (14...Qe7 15.d3=+) 15.0–0 (15.Ne4 Re8=+) 15...Qd7 (15...Qe7 16.h3 Bh5 17.d3=) 16.Rd1 (16.d3 Ra8=) 16...Nbd5 (16...Ra8 17.d3=) 17.Nd5 Nd5 18.Qe4 (18.h3 Nb4 19.Qe4 Bf3 20.Qf3 Re8=) 18...Nf6=+ 19.Qc4 Qc7 20.h3 Be6 21.Qc2 (21.Qc3 Ra8=) 21...h6 (21...Bd5 22.d4 ed4 23.ed4=+) 22.Rc1 (22.b6 Qb6 23.Be5 Be5 24.Ne5 Bd5=) 22...Qb8 (22...Ra8 23.Bc4 Bc4 24.Qc4=) 23.d3 (23.Bc4 Bc4 24.Qc4 Re8=) 23...Nd7 (23...Nd5 24.Bb2=) 24.Nd2 (24.d4 ed4 25.ed4 Rc8=) 24...f5 (24...Qc7 25.Bf3=) 25.Nc4+= Be7 (25...b6 26.d4 ed4 27.Nd6 Qd6 28.ed4+=) 26.d4 (26.Bf3 Bg5+=) 26...cd4 27.ed4 ed4 (27...e4 28.d5 Bd5 29.Ne3+=) 28.Bd4+= Bf6 29.Bf6 Nf6 30.Ne3 (30.Bd3 Qf4=) 30...Rc8 31.Qb2 (31.Bc4 Kh8 32.Be6 Rc2 33.Rc2 Qe5 34.Bf5 g5+= (34...Qb5? 35.Rc8 Ng8 36.Be6+–)) 31...Ne4? (better is 31...Rc1 32.Qc1 Qe5=) 32.Nc2?? (better is 32.Bc4 Rc4 33.Nc4+– (33.Rc4?! Bc4 34.Nc4 Qe8=)). Sternik,Ryszard – Grzelak,R, Poland, 1966.

11.Be2 b6

12.0–0 dc4 13.Bc4 Bb7 14.Bb2 =+.

12.0–0 dc4 13.Bc4 Bb7 14.d3 =+.

12.cd5 ed5 13.0–0 Bb7 =.

12.cd5 ed5 13.0–0 Re8 =+.

12.0–0 Bb7

13.Qc2 dc4 14.Rc1 –/+.

13.Qc2 Qc7 14.cd5= ed5 15.Qf5 (15.d4 cd4 (15...Ra8 16.Bb2 c4 17.Ra1 Ra1 18.Ba1 Nf8 19.Bb2) 16.ed4 Re8= (16...Ne4 17.Rc1 Qb8 18.Qb3 Rc8 19.g3) 17.Bb2 Ne4 18.Rc1 Bf4 19.Ne4; 15.Bb2 d4 16.Na4 Be4 17.d3 Bf3 18.Bf3 Bh2 19.Kh1 de3; 15.Na4 h6 16.Bb2 Ra8 17.Rc1 Ne4 18.h3 Qd8 19.Nc3; 15.Re1 d4 16.Na4 de3 17.de3 Be4 18.Qd2 Bf3 19.Bf3; 15.Rc1 Ra8 16.g3 h6 17.Na4 Qd8 18.Bb2 Ne4 19.Ra1; 15.Qd3 Ra8 16.Bb2 c4 17.Qc2 Nc5 18.g3 Ne6 19.Nd4; 15.h3 d4 16.Na4 Re8 17.Re1 de3 18.de3 Be4 19.Qb3) 15...d4 16.ed4 cd4 17.Nd4 Bh2 18.Kh1 Be5 (18...Bf4 19.Nc6–/+ (19.Rd1+=); 18...g6 19.Qh3) 19.Nf3 (19.Nb3 Re8 20.d4 Bf4+=; 19.Nc6+=) 19...Re8–/+ 20.Bd3 (20.Re1 Qc5 21.Bf1 Qf2+=) 20...g6 (20...Qd6 21.Bb1–/+) 21.Qh3 Nh5 (21...Qd6 22.Ne5 Re5–/+ (22...Qe5?! 23.Ne4 Qh5 24.Nf6 Nf6 25.Qh5 Nh5 26.Bc4=)) 22.Ne5= Ne5 23.Be4 Nf6 (23...Nf4 24.Qg3 Qc4 25.d3 Ned3 26.Bb7+=) 24.Bb7 ½–½. Teichmann,Erik (2320) – Neverov,V (2570), 8th Dubai Open, Dubai UAE, 2006.

13.d4 dc4 14.dc5 Nc5 15.Nd2 =+.

13.d4 cd4 14.Qd4 e5 15.Qd2 e4 =.

13.d4 cd4 14.Nd4 dc4 15.Ne6 Bh2 16.Kh2 fe6 17.Qd6 =+.

13.d4 cd4 14.Nd4 Qc7 15.cd5=+ Bh2 16.Kh1 Nd5 17.Nd5 Bd5 (17...ed5? 18.f4 Bf4 19.ef4+–) 18.f4 Bg3 19.Nf5 ef5 20.Qd5 Qd8 (20...Re8!?=) 21.Qf5+= Qh4 (21...Nc5 22.Qg4 Qh4 23.Qh4 Bh4 24.Bd4+=) 22.Qh3 Nc5 23.Bd4 Ne4 24.Bb6 (24.Qh4 Bh4 25.Kg1 Bf6+=) 24...Nf2 (24...Re8 25.Qh4 Bh4 26.Kh2+=) 25.Rf2 Bf2 26.Qh4 Bh4 27.Kh2 Be7 28.Ba7 Rd8 29.Bf3 Bd6 30.Bd4 Bb8 31.b6 g6 32.g4 Re8?? 33.b7 g5 34.Be5 Be5= 35.fe5 Kf8 36.Kg3 Ke7 37.Bd5 f6 38.ef6 Kf6= 39.e4 Ke5 40.Kf3 Kd4 41.Ke2 Rf8 42.Be6 Rb8 43.Bd5 (43...Rf8 44.Kd2=). Junge – Steinmuller, corr, 1977.

13.cd5 Nd5 14.Nd5 Bd5 =.

9.Nf3 Be7

10.Qb3 0–0 11.Be2 b6 12.0–0 Bb7 13.d3 Qc7 14.Nbd2 e5 15.cd5 Nd5 16.Nc4 Bf6 17.g3 Ra8 18.Bb2 Nb4 19.e4 Bc8 20.Bc3 Ra2 21.Nfd2 Ra8 22.Nf3 Nf8 23.Bb4 cb4 24.Qb4 Bg4 25.Qb2 Ne6 26.Rc1 Rc8 27.Kg2 Bf3 28.Bf3 Nc5 29.Ne3 Bg5 30.d4 ed4 31.Qd4 Rd8 32.Qc3 Qd7 33.Nf5 Bf6 34.Qc4 Qe8 35.Rc2 Nd3 36.Re2 g6 37.Nh6 Kg7 38.Ng4 Ne5 39.Ne5 Qe5 40.Rc2 Qd4 41.Be2 Qc4 42.Bc4 Bd4 43.Bd5 Bc5 44.Ra2 Rd7 45.f4 h5 46.h3 Kf6 47.Ra8 Ke7 48.Rh8 Bd4 49.Rh7 Kf8 50.g4 White intends f5 50...Kg8 51.Rh6 Kg7 52.g5 Rc7 53.Bc6 Ra7 54.f5 Ra2 55.Kf3 Ra3 56.Kg2 Be5 (56...Ra2!? 57.Kf1 gf5=) 57.fg6 Rg3 58.Kf2 Rg5 59.gf7 Kf7 60.Bd5 Ke7 61.Re6 Kd7 62.Rh6 Bd4?? (62...Ke7 63.Kf3 Bf6+/–) 63.Kf3+– Ke7 64.h4 Re5 65.Rh7 Kd6 66.Kf4 Kc5 67.Bc6 Kb4 (better is 67...Bc3!?+/–) 68.Rf7+– Rc5 69.Rf5 Rf5 70.Kf5 Be3 71.Kg6 Kc5 72.Kh5 Kd6 73.Kg6 Ke6 74.h5 Ke7 75.e5 Ke6 76.Bd7! Ke5 (76...Kd7 77.Kf7 Combination) ½–½. Lothal,Guenter (1870) – Costello,Colin (2070), Leipzig VfB op, 2003.

10.Be2 0–0 11.0–0 dc4 12.Bc4 Nb6 13.Na3 (13.d3 Bd7=) 13...Nc4 14.Nc4 Bd7 (14...Qd3 15.Nfe5 Qf5 16.d3=) 15.Qb1 (15.Qb3 Nd5=) 15...Nd5 16.d4 Nb4 (16...f6 17.Rd1=) 17.Rd1+= Qc7 (17...cd4 18.Bd4 Qe8 19.Be5+/–) 18.b6 (18.dc5 Bc5 19.Be5 Qc8+–) 18...Qc8 19.Nce5 (19.dc5 Bc5 20.Ng5 g6+–) 19...Rd8 (19...Ba4 20.Rc1+=) 20.Rc1 (20.dc5 Na6 21.Nf7+– (21.Rd7?! Rd7 22.Nd7 Qd7=)) 20...Na6+= 21.dc5 Nc5? (better is 21...f6 22.Nd7 Qd7=) 22.Bd4 (22.Nf7 Rf8 23.N3g5 Bg5 24.Ng5 Rf5+–) 22...Ba4 (22...Be8 23.Bc5 Bc5+–) 23.Nd3?? (better is 23.Bc5 Bc5 24.Nd3+–) 23...Nd3= 24.Rc8 Rc8 25.Bb2? (better is 25.Qd3 Rc1 26.Qf1 Rf1 27.Kf1=+) 25...Nb2?? (better is 25...Rc2 26.g3 Bc5–+ (26...Rb2?! 27.Qd3 Rb6 28.Nd4=)) 26.Qb2+/– Rc2 (26...Bc6 27.Nd4+/–) 27.Qa1 Bf6 28.Nd4 (28...Bd4 29.ed4+/–) 1–0. Giudice,U – Ammendola,G, Cava de Tirreni, 1972.

10.Be2 0–0 11.d3 =.

10.Be2 Qa5 11.Nc3 (11.Bc3 Qc7=) 11...Nb6 (11...dc4 12.Bc4 0–0 13.0–0=) 12.0–0 (12.cd5 ed5 13.0–0 Bf5=) 12...0–0 (12...Nc4 13.Bc4 dc4 14.Ne5=) 13.d3 Rd8 14.Qc2 (14.Qd2 Qa8 15.cd5 ed5=) 14...Bd7 (14...Bd6 15.Rd1=) 15.Bb2+= Qa8 (15...dc4 16.dc4 Qb4 17.Ra1+/–) 16.Ra1 Qb8 17.Na4 Na4 18.Qa4 Be8 (18...dc4 19.dc4 Ng4 20.Qa7+=) 19.Qa7 (19.Be5 Qc8+/–) 19...Qc8 20.Bc3 Bd6 21.Nd2 Bb8 22.Qa2 Qc7 23.g3 e5= 24.Bf3 d4 25.ed4 ed4 26.Bb2 Nd7 27.Be4 Ne5 28.Qa8 b6 29.Ra3 Bd7= 30.Bc1 Re8 31.Nf1 Qd6 32.Bf4 Kf8 33.Nd2 f5 34.Bd5 Qe7= 35.Be5 Be5 36.Qb7 Bf6 37.Ra8 Ra8= 38.Qa8 Qd8 39.Qb7 g5 40.Bc6+/– Be6 41.Qh7 g4 42.Qh6 Kf7 43.Qh7 Kf8 44.h3 Bg7 45.Qg6 Qe7 46.hg4 fg4 47.Ne4 Qf7 48.Qg5 Qc7 49.Bd5 Qd7? 50.Be6 Qe6 51.Qd8 Qe8 52.Qb6 Kg8 53.Qc5 Qf7 54.Qc8 Bf8 (54...Qf8 55.Qg4 Qa3+–) 1–0. Hirth,Ullrich – Miezis,Normunds (2360), Biel MTO op, 1992.

10.Be2 dc4 11.Bc4 Nb6 12.d3 =.

8.c4 Be7

9.Qa4 0–0 10.Nf3 Nbd7 11.Be2 Nb6 12.Qc2 Nc4 13.Bc4 dc4 14.Qc4 b6 15.d4 Bb7 16.Nbd2 Qd5 (16...Qa8 17.0–0 Rc8 18.Qd3–/+) 17.dc5+= Qc4 18.Nc4 Bc5 19.Bd4? (19.0–0 Rc8+=) 19...Rc8 (better is 19...Bd4 20.ed4 Rc8–+) 20.Bb2?? (better is 20.Bf6 Bb4 21.Kd1 Rc4 22.Bd4–/+) 20...Bb4–+ 21.Nfd2 (21.Ncd2 Rc2 22.0–0 Bd2 23.Nd2 Rd2 24.Bf6 gf6 25.f3–+) 21...Rc4 22.Ke2 (22.Kd1 Bd2 23.Kd2 Ne4 24.Kd3 Rb4–+) 22...Rc2 23.Bc1 Ne4 24.Kd3 Nf2 (better is 24...Rc3 25.Ke2 Nc5 26.Nb1 Rc2 27.Bd2–+) 25.Kc2 Nh1 26.Nc4 Bc5 27.g3 Nf2 28.Bd2 (28.Ne5 Be4 29.Kd2 Bd6–+) 28...Ne4 29.Be1 Nd6 30.Nd6 Bd6 31.Kc3 Kf8 32.Kc4 (32.Kd3 Bg2–+) 32...Bg2 33.Kb3 (33.Bd2 Bf1 34.Kb3 Bb5–+) 33...Ke7 34.Bc3 Bf1 (34...e5 35.Bb4–+) 35.Ka4 (35.Bg7 e5–+) 35...e5 36.Ba5 ba5 0–1. Leon Manas,JF (1715) – De La Hoz Sanchez,Ruben (2000), Torneo de Ajedrez Dia Universa, 2009.

9.Nf3 b6 10.Be2 Bb7 11.0–0 Nbd7 12.Na3 0–0 13.Nc2 Bd6 14.d4 dc4 15.dc5 Nc5 16.Bc4 Bd5 17.Bf6 gf6 18.Bd5 ed5 19.Ncd4 Ne6 20.g3 Be5 21.Nc6 Qd6 22.Nh4 f5 23.Nf5 Qc5 24.Nce7 Kh8 25.Qb1 Nc7 26.Rd1 Bf6 27.Rc1 Qb5 28.Qb5 Nb5 29.Nd5 Bd8 30.Rb1 Na3 31.Rb3 Nc4 32.Rb4 Ne5 33.Nb6 Re8 34.Nc4 Nd3 35.Ra4 Bf6 36.Ncd6 Rb8 37.Nf7 Kg8 38.N7h6 Kf8 39.Ra7 Be5 40.Rf7 Ke8 41.Rh7 Rb1 42.Kg2 Rb2 43.Ng4 Bc3 44.Nd6 Kd8 45.Ne4 Be1 46.Rf7 Ke8 47.Rf5 Bb4 48.h4 Ne1 49.Kh3 Rb1 50.h5 Nd3 51.h6 Be7 52.Ngf6 Kf7 53.h7 Kg7 54.Nd5 Bd8 55.Rf7 Kf7 56.Kg4 Kg7 57.f4 Kh7 58.Nef6 Kg6 59.f5 Kf7 60.Nh5 Ne5 61.Kf4 Nd3 62.Ke4 Nc5 63.Kf3 Rf1 64.Kg4 Nd3 65.Nhf4 Ne5 0–1. orangutandu – costelinache, internet, 2013.

9.Nf3 Nbd7 10.Be2 0–0 11.d3b6 12.Nbd2 Bb7 13.0–0 Qc7 14.Qc2 h6 Secures g5 15.Bb2 Ra8 16.Ra1 Qb8 17.Qb1 Ra1 18.Qa1 Qa8 19.Qa8 Ba8 20.Ne5 Ne5 21.Be5 Nd7 22.Bc7 Kf8 23.d4 (23.f4 Ke8=) 23...Ke8 24.Nb3 Bd8 25.Bd8 Kd8 26.f3 dc4 27.Bc4 Bd5 Black threatens to win material: Bd5xc4 28.Nd2 cd4 29.ed4 Nf6 30.Bd3 Bb7 31.Nc4 Nd5 32.Nd6 White threatens to win material: Nd6xb7 32...Kc7 33.Nf7 Nb4 34.Bg6 Bd5 35.Ne5 Here comes the goal–getter 35...Kd6 (35...Bb3 36.Be4=) 36.Kf2 Bb3 37.Ke3 (37.g3 Bc2 38.Nc4 Kc7+=) 37...Nd5= 38.Kd2 Nf4 Black threatens to win material: Nf4xg2 39.Kc3 Bd5 40.Be4 Ng2 41.Bd5 ed5 A knight endgame occured. (41...Kd5 Worse is 42.Nd7+=) 42.Kd2 Nh4 43.Ke3 Nf5 44.Kd3 g5 45.Ng4 h5 46.Nf2 0–1. Huber,Herbert – Hoffmann,Erwin (1865), Fechenheim CC–ch, 2003.

9.Nf3 Bd7 10.Be2 dc4 11.Bc4 Ne4 12.Qc2 +=.

9.Nf3 Bd7 10.Be2 Qc7 11.0–0 Bd6 (11...0–0 12.Qc2+=) 12.Qc2 (12.Bf6 gf6 13.cd5 ed5+/–) 12...e5+= 13.h3 (13.cd5 Nd5 14.Ne5 Be5+=) 13...e4 14.Ne1 Be6? (better is 14...Bh2 15.Kh1 Be5 16.Be5 Qe5 17.cd5 Qd5+=) 15.Qb3?? (better is 15.Bf6 gf6 16.cd5+/–) 15...Be5 16.Be5 Qe5 17.cd5 Nd5 18.Bc4 Nd7 19.f4 ef3 20.Nf3 Qd6 21.Ng5 N7b6 22.Ne6 Qe6 (better is 22...fe6!? 23.Nc3 Qe5+=) 23.Nc3+/– Nc4 24.Qc4 Nc3 25.Qe6 (better is 25.Qc3!? 0–0 26.Qc5+/–) 25...fe6= 26.dc3 Ke7 27.Rf4 e5 28.Rf2 Ra8 29.Rc2 Ra3 30.Kf2 c4 31.Kf3 Rb3 32.Ke4 Ke6 33.Ra2= Rb5 34.Ra4 Rc5 35.Rb4 b5+= 36.g3 h5 37.Rb2+= Rd5 38.Rb4 g6 39.Rb1 Kd6 40.Rb4 Kc6–/+ 41.Rb1 Rd3 42.Rc1 Kc5 43.Rc2 b4 44.cb4 Kb4 45.Re2 Kc3 46.Ke5 Rd2 47.Re1 Kd3 48.e4 c3 49.Kf6 c2 50.Rc1 Ke4 51.Kg6 Kd3 52.Kh5 Rd1 53.Rc2 Kc2 54.g4 Kd3 55.g5 Ke4 56.g6 Kf5 57.g7 Rg1 58.Kh6 Kf6 59.h4 Rg7 60.h5 Rg5 61.Kh7 Rh5 62.Kg8 Rg5 63.Kf8 Rg7 64.Ke8 Rh7 65.Kd8 Ke6 66.Kc8 Kd6 67.Kb8 Kc6 68.Ka8 Kb6 69.Kb8 0–1. Otten,Thomas – Zoglowek,Sven (1605), SJNR–ch U16, 2005.

9.Nf3 Nbd7 10.Nc3 0–0 11.Be2 Qc7 12.0–0 Nb6 13.d3 Rd8 14.Qc2 Bd7 15.Bb2 Ra8 16.Ra1 Ra1 17.Ba1 Ne8 18.Na4 Na4 19.Qa4 f6 20.Nd2 dc4 21.dc4 (worse is 21.Qc4 Qa5 22.Bc3 Qb5–/+; 21.Nc4?! Nd6 22.Qa8 Qc8=) 21...Bd6 22.f4 e5 23.g3 ef4 24.ef4 g5 25.Ne4 gf4 26.Nf6 (better is 26.Qa8 Qc8 27.Qc8 Bc8 28.Bf6 fg3 29.hg3 Bg3 30.Be7=) 26...Nf6–/+ 27.Bf6 Bf5 (better is 27...fg3!? 28.h4 Be6–/+) 28.Bf3 Kf7 29.Qa1 Be6 30.Bh8 Kg8 (30...fg3?? 31.Qf6 Kg8 32.Qe6 Kh8 33.Qf6 Qg7 34.Qd6+–) 31.Qa8 (better is 31.b6!? Qf7 32.gf4 Bc4 33.Be5 Be5 34.Qe5 Qg6 35.Qg5+=) 31...Bf8+= 32.Qa1 Qf7 33.Kg2 (better is 33.gf4!? Bc4 34.Be5=) 33...Bc4 34.b6 fg3 35.hg3 Bd5 36.Bd5 Qd5 37.Kh3 Qe6 38.Kg2 Qb6 39.Be5 Qe6 40.Bf4 b5 41.Qd1 b4 42.Qd8 h6 0–1. Krebbers,Wilfried (2155) – Stefkovic,Marijan (2130), Goch op, 2006.

9.f4 Nbd7 10.Nf3 0–0 11.Be2 dc4=+ 12.Bc4 +=. Adam – Bach, corr, 1973.

9.f4 Nbd7 10.Nf3 dc4 11.Bc4 0–0 12.0–0 =.

9.Nf3 0–0

10.Qb3 Nbd7 1–0. Schuchardt,Wolfgang (1690) – Winkler,Karl (1750), Mecklenburg VP LL1, 2006.

10.Qc2 b6 11.Be2 Bb7 12.0–0 Nbd7 13.d3 Qc7 14.cd5 ed5 15.Nbd2 Bd6 16.h3 Ne5 (16...Re8 17.Rc1=) 17.Bb2 (17.Ne5 Be5 18.Nf3 Ba1 19.Ra1 Qd7=) 17...Nf3 18.Nf3 Qd7 (18...Qe7 19.Ra1=) 19.Qb3 (19.Bf6!? gf6 20.Qb2+=) 19...Qe6 (19...Qe7 20.Qc2=+) 20.Ra1= Ra8 (20...Re8!?=) 21.Ra8+= Ba8 22.Qa4 Qc8 23.Be5 (23.Bf6 gf6 24.Qa1 Qd8+=) 23...Ne8 (23...Be5 24.Ne5 Bb7 25.d4=) 24.Qf4 (24.d4 c4=) 24...Qd7 25.Qa4 Nc7 26.Bd6 Qd6= 27.d4 c4 28.Ne5 g6 29.Bf3+= f6 30.Nc4!+/– dc4 31.Ba8 c3 32.Bc6 Kg7? 33.Qb3 Ne6 34.Qc3 Ng5 35.h4 Nf7 36.Bf3 Nd8 37.Qc8 h5 38.g3 f5 39.Bc6 Nf7 40.Qb7 Kf6 41.Qb6 Nd8 42.Qc5 Qc7 43.d5 Nb7 44.Qd4 Ke7 45.b6 (45...Qd8 46.Qe5 Kf8 47.Qh8 Kf7 48.Qh7 Kf8 49.Qb7+–) 1–0. Fredek (2090) – Guest27860, Freundschaftspartie, 5m + 0s, 2005.

10.Qc2 Nbd7 11.Bd3 b6 12.Ng5 (12.cd5!? ed5 13.0–0+=) 12...h6–/+ 13.h4 Re8 (13...dc4!? 14.Bh7 Kh8–/+) 14.Bh7+= Kf8 15.Bg6 hg5 16.hg5 Bd6 17.gf6 Nf6 (17...fg6?? 18.Qg6 gf6 19.Rh7 dc4 20.Rf7) 18.Rh8 (18.Bh5!?=) 18...Ke7+= 19.Bf6 Kf6 20.Re8 Qe8 21.Bd3 dc4 (21...Bb7!?–/+) 22.Qc4= g5 (22...g6 23.Nc3=) 23.Qe4 Bd7 24.Qh7 Be5 25.Na3 Qf8 26.Nc4 Bc7 27.f4 Qg7 28.Ne5 Qh7 29.Nd7 (29.Bh7? Be5 30.fe5 Ke5–+) 29...Kg7 30.Bh7 Kh7 31.fg5 Kg6 32.Nf6 Kg5 33.Ne4 Kg4 34.Kf2 Be5 35.d3 f5 36.Nd2 Bg3 37.Ke2 Bc7 38.Kf2 f4 39.e4 ½–½. Leon Manas,JF (1735) – Gonzalez Garcia,Guillermo (2215), Torneo de Ajedrez de Otono La, 2009.

10.Be2 Qa5 11.Nc3 dc4 12.Bc4 Nbd7 (12...Rd8 13.0–0=) 13.0–0 Nb6 14.Qb3 (14.d3 Nc4 15.dc4 Rd8=) 14...Rd8 (better is 14...Nc4 15.Qc4 Rd8=) 15.d4 (better is 15.Be2=) 15...Qb4–/+ (15...Nc4?! 16.Qc4 cd4 17.Nd4=+) 16.Ne5 Nc4 17.Qc4 Qc4 (17...cd4?! 18.Qb4 Bb4 19.Na2=+) 18.Nc4 cd4 19.ed4 Bd7 (19...Rd4!? 20.Nb6 Bd7–/+) 20.Rb1 Be8 21.Na5 Rb8 (21...Rd7 22.Rc1=+) 22.f3 (22.b6 Bd7=) 22...Kf8 23.Kf2 Bd8 (23...Bd6 24.g3=+) 24.Nc4 Be7 25.Ke3 Ra8 26.Kd3 Nd5 27.Nd5 ed5 28.Ne3 Ra5 29.Nd5= Bb5 30.Ke3 Ra3 31.Kf2 Ra2 32.Rb2 Rb2 33.Bb2 Bd6 34.Bc3 Bc4 35.Bb4= Bd5 36.Bd6 Ke8 37.Ke3 Kd7 38.Bf8 g6 39.Kf4 f6 40.h4 Ke6 41.Bc5 b5 42.g4 Bc6 43.Ke3 f5 44.Kf4 fg4 45.fg4 h5 46.gh5 gh5 47.Ke3 Kf5 48.Kd3 Bd5 49.Kc3 Ke4 50.Be7 Bc4 51.Bf6 Kd5 52.Kb4 ½–½. Klinke,Werner – Wilbert,Siegfried, Ruhrgebiet VK2–chT, 1996.

10.Be2 b6 11.0–0 Bb7 12.d4 Nbd7 13.Nbd2 Qc7 14.Qb3 Bd6 15.h3 e5 (15...cd4 16.Nd4 Ra8 17.Rc1+=) 16.dc5 Nc5 17.Qc2 e4 18.Nd4 Rc8 19.Rc1 Qd7 20.Bb2 Bb8 21.Nf1 (better is 21.Bf1!?=) 21...dc4–/+ 22.Nc6 Nd3 (better is 22...Bc6 23.bc6 Qc6 24.Qc4 Rd8–/+) 23.Qc3?? (23.Bf6 Bc6 24.Bg4 Nc1 25.Bd7 Bd7 26.Bg7 Kg7 27.Qc1–/+) 23...Bc6 (23...Nc1 24.Qc1 Bc6 25.Bf6 gf6 26.bc6 Rc6 27.f3–+) 24.bc6 Qc6 25.Bd3 ed3 26.Nd2 b5 27.Nf3 Bd6 28.Qd4 (28.Qa5 Ne4 29.Nd4 Qc5 30.Qb5 d2–+) 28...b4 (28...Qd5!? 29.Qa7 Ra8 30.Qb6–+) 29.Qh4 (29.Rc4 Bh2!! 30.Kh2 Qc4 31.Qe5–+) 29…c3 (29...c3 30.Bc3 bc3–+) 0–1. Vigneron,Jean (1970) – Milliet,Sophie (2295), Vandoeuvre op, 2004.

10.Be2 dc4 11.Bc4 Nbd7 12.0–0 Nb6 13.Be2 (White gets the initiative) 13...Ne4 (13...Nbd5 14.Qc2=) 14.Qc2+= Qd5 15.Nc3 Nc3 16.Bc3 c4 17.Rb1 f5 (17...Rd8!?+=) 18.Ba5+/– Bc5 (18...Qd6 19.Bb4 Qd8 20.Be7 Qe7 21.Bc4+/–) 19.Bb6 Bb6 20.Qc4 (20.Bc4 Qd6+/–) 20...Qd6 21.d4 Bd7 22.Ne5 Rc8 23.Qb3 Kf8 (23...Ra8 24.Nd7 Qd7 25.Bc4+–) 24.h3 (24.Ra1 Bc7+–) 24...Ke7 (24...Ra8 25.Nc4 Qc7 26.Qb4 Kf7 27.Qd6 Qd6 28.Nd6 Ke7 29.Nb7+–) 25.Bf3 Qb8 26.Qb4 Qd6 27.Qd6 (27.Bb7 Qb4 28.Rb4 Rc2+–) 27...Kd6 28.Bb7 Rb8 29.Nd7 (29.Nc4 Kc7 30.Bf3 f4+–) 29...Kd7 30.Bc6 Kd6 31.Kf1 Rc8 32.Ke2 Rc7 33.Ra1 Ra7 34.Ra7 Ba7 35.Kd3 Bb6 36.f3 (36.f4 h6+–) 36...Ba7 (36...g5 37.f4+–) 37.e4 (37.g4 f4 38.ef4 Bb6+–) 37...e5 38.de5 Ke5 39.ef5 Kf5 40.Be4 Kf4 41.Bh7 g5 (41...Kg3 42.Be4+–) 42.Kc4 Ke5 (42...Kg3 43.Be4+–) 43.g3 Bf2 44.h4 (44...gh4 45.gh4 Bh4 46.b6+–) 1–0. Lipok,Erik – Heiduczek,Josef, NB op Germany, 1992.

10.Be2 Nbd7 11.0–0 b6 12.d3 Bb7 13.Bb2 Qc7 14.Nbd2 e5 15.cd5 Nd5 16.Qb3 Ra8 17.Ra1 Ra1 18.Ba1 Kf8 19.g3 Bd6? (19...Nb4 20.Nc4 e4 21.de4 Be4 22.Nfd2=) 20.Nc4 (better is 20.e4 and the scales tip in favour of White 20...Nb4 21.Ng5+/–) 20...f6= Prevents intrusion on g5 21.Nfd2 Ne7 (21...Be7!?=) 22.e4 g6 Covers h5 23.Ne3 Kg7 Black king safety dropped 24.Bg4 Nf8 25.Ndc4 h5 26.Nd6 Qd6 White has the pair of bishops 27.Nc4 The knight feels good on c4 27...Qd8 28.Be2 Ng8 (28...Bc8 29.Ne5 Be6 30.Nc4+/–) 29.f4 (29.Qa3!? should be investigated more closely 29...Qc7 30.Bc3+=) 29...ef4= 30.gf4 Ne6 31.f5 White threatens to win material: f5xe6 31...Nf4 The backward pawn on d3 becomes a target. Black threatens to win material: Nf4 32.Bf1 gf5 33.e5 (better is 33.Qa3!?= might be a viable alternative) 33...Qd5–/+ 34.ef6 Kf8 35.Qb2?? Qh1–/+ 36.Kf2 Bg2 37.Ne3 Bf1 38.Kg3 Ne2 39.Kf2 Nf4 Twofold repetition 40.Kg3 Nd3 41.Qd2 f4 42.Kh4 Qg1 (42...Qg1 43.Qa2 Qe3 (43...fe3?! 44.Qa8 Kf7 45.Qa2 Ke8 46.Qa8 Kd7 47.Qd5 Kc8 48.Qe6 Kd8 49.Qb6 Kc8 50.Qc6 Kd8 51.Qd6 Ke8 52.Qe6 Kf8 53.Qc8 Kf7 54.Qb7 Ke6 55.Qe4 Kf7 56.Qd5 Kf8 57.Qa8 Kf7 58.Qa2 Kf8 59.Qa8 Kf7 60.Qa2 Ke8 61.Qa8 Kd7 62.Qc6 Kd8 63.Qd5 Ke8 64.f7 Kf8 65.fg8Q Qg8 66.Qa8 Kf7 67.Qd5 Kf8 68.Qd8 Kf7 69.Qf6 Ke8 70.Qc6 Kf7 71.Qd5 Kf8=) 44.Qa8 Kf7 45.Qb7 Ne7 46.Qe7 Qe7 47.fe7 f3–+) 0–1. Melich,Jindrich (2150) – Wurm,Christoph (2155), Imperia op, 2000.

10.Be2 Nbd7 11.0–0 dc4 12.Bc4 Nb6 13.Be2 Nfd5 14.Na3 (14.Nc3 f6=) 14...f6 15.Nc4 (15.Qb3 Bd7=) 15...Bd7 (15...e5 16.Qb3 Be6 17.Nb6 Qb6 18.Bc4=) 16.Qb1 (16.Qb3 Qc7=) 16...Nc4 (16...Nb4 17.Qe4=) 17.Bc4= Qb6 (17...Bd6 18.d4=) 18.Bd3 (18.Qb3 Ra8=) 18...h6 (18...Kh8 19.Bh7 Bb5 20.Bd3 Bd3 21.Qd3=) 19.Qb3 (19.Bc4 Ra8 20.Qb3 Kf8=) 19...Nb4 (19...Ra8 20.Bc4=) 20.Bc4 Re8 (20...Kf7 21.Qa4+=) 21.Qa4 (21.d4 Kf7 22.dc5 Qc5+/–) 21...Na6 (21...Nd5 22.d4+=) 22.Rb1 (22.Nh4 Ra8 23.Rb1 Nc7=) 22...Nc7 23.Bc3 Ra8 (23...Nd5 24.Ra1=) 24.Qb3 Kh7 (24...Be8 25.Nh4+=) 25.h3 (25.d4 Be8+=) 25...Qd6 (25...Be8 26.d4=) 26.d4+= cd4?? (26...Nd5 27.dc5 Qc5 28.Bd4+/–) 27.Nd4 (better is 27.Bb4 Qb4 28.Qd3 Kh8 29.Rb4 Bb4 30.Qd4+–) 27...f5? (27...Nd5 28.Bb2+=) 28.Nc2?? (better is 28.Nf5 ef5 29.Rd1+–) 28...e5 (28...Bd8 29.e4 fe4 30.Ne3+=) 29.Bb4 (29.Ne1 Be6 30.Be6 Qe6 31.Qe6 Ne6 32.Be5 Kg6+=) 29...Qf6 30.Rd1 Rd8 31.Na3 Bb4 32.Qb4 Be6 33.Be6?? Rd1–+ 34.Kh2 Qe6 35.Nc4 e4 36.Qc5 Ne8 37.b6 Rc1 38.Qb5 Rc4 39.Qa5 Qd6 40.g3 Qc5 41.Qa8 Rc2 (41...Rc2 42.Kg1 Qc3 43.Qa6 ba6 44.g4 Qe1 45.Kg2 Qf2 46.Kh1 Qh2#) 0–1. Frosinos,Ioannis – Zvan,Ziga (2095), Chania op 8th, 1998.

10.Be2 Nbd7 11.0–0 Qc7 12.d3 b6 13.Nbd2 Bb7 14.Qc2 Ra8 15.Bb2 Bd6 16.g3 Qb8 17.Ra1 Ra1 18.Ba1 Qa8 19.Bb2 Qa2 20.Qb3 Qb3 21.Nb3 e5 22.Nbd2 e4 23.de4 de4 24.Ne1 Ne5 25.f4 ef3 26.Nef3 Ned7 27.Ng5 Kf8 28.Bf3 Bf3 29.Ngf3 Ng4 30.Nf1 h5 31.h3 Ngf6 32.Bf6 Nf6 33.N3d2 Ke7 34.Kf2 Ke6 35.Kf3 Nd7 36.Ke2 Ne5 37.e4 h4 (37...Be7 38.Nh2=) 38.gh4+= Be7 39.h5 Bg5 40.Ne3 Be3 41.Ke3 Kf6 42.Kf4 Nd3 43.Ke3 Ne5 44.Kf4 ½–½. Zeven,Frank (1895) – Partenheimer,Axel (2155), Leiden NED, 7th LCT Open, 2013.

10.Be2 Nbd7 11.d4 Qa5 (11...Qc7 12.cd5 Nd5 13.0–0+=) 12.Bc3 Qa2 13.Nbd2 b6 (13...cd4 14.Nd4 Nc5 15.Qa1 Qa1 16.Ba1+=) 14.Qb3= Qb3 15.Nb3 Bb7 16.0–0 Ne4 17.Bb2 dc4 18.Bc4 Rc8 (18...cd4 19.Bd4 Rc8 20.Bd3+=) 19.dc5 Ndc5 20.Nc5 Nc5 (20...Rc5 21.Bd3 Bf6 22.Nd4=) 21.Ba3 (21.Ne5 Ne4=) 21...Ra8 (21...Bf6 22.Rc1+=) 22.Bc5 (22.Bb2 Ra4 23.Rc1 Bd5 24.Bd5 ed5=) 22...Bc5 23.Ne5 Be7 24.Nd7 Bd8 25.Be2 (25.Ne5 Rc8=) 25...Ra2+= 26.Re1 Rd2 27.Ne5+= Bf6 28.Nc4+= Rc2 29.Nb6 g6 30.Kf1 Bd8 31.Nc4 Bd5 32.Ne5 Rb2 33.Nd7 Ba5 34.Rc1 Bd2 35.Rd1 Bc3 36.Bd3 Kg7+= 37.Rb1 f6?? 38.b6?? Kf7? 39.Nc5 Rb1 40.Bb1 Bc4 41.Kg1 Ke7 42.f4 Ba5 43.b7 Bc7 44.Bd3 Bd5 45.Na6 Bf4 46.ef4 Bb7 47.Nc5 Bc6 48.Kf2 e5 49.fe5 fe5 50.g3 Be8 51.Ke3 h6? 52.Bc4 g5?! 53.Ne4 Bc6 54.Bg8 Kf8?! 55.Be6 Kg7 56.Bf5 h5 57.Ng5 Kf6 58.Be4 Bd7 59.h4 Kg7 60.Bf3 Kg6 61.Ke4 Ba4 62.Ke5 Bb3 63.Ne6 Kh6 64.Nf4 Bf7 65.Bh5! Ba2 66.Kf6 Bb1 67.Bg6 Bg6 68.Ng6 Kh7 69.Ne7 Kh6 70.g4 Kh7 71.h5 (71.h5 Kh6 72.Nf5 Kh7 73.Kf7 Kh8 74.g5 Kh7 75.g6 Kh8 76.g7 Kh7 77.g8Q#; 71.Kf7 Kh6 72.Nf5 Kh7 73.g5 Kh8 74.h5 Kh7 75.g6 Kh8 76.g7 Kh7 77.g8Q#) 1–0. Schatz,Hans Ullrich – Kreiling,Carsten (2145), Baunatal op 4th, 1998.

8.bc6 bc6

9.c4 Ba6 10.d3 =+.

9.c4 Bd6 10.cd5 cd5 11.Bb5 Bd7 12.Bd7 Nbd7 13.Ne2 0–0 14.0–0 Ng4 15.f4 Qh4 16.h3 Ngf6 17.Qe1 (17.Qa4 Nb6 18.Qa6 Nc4=) 17...Qh6 18.Ng3 (18.Bf6 Nf6 19.d3 Qg6=) 18...Nc5 19.Nc3 Ra8 20.Nb5 Be7 21.Nc3 (21.f5 Rb8 22.Qe2 Ne8=) 21...Qg6 22.f5 Qg5 23.Qf2? (better is 23.Nce2= and White could well hope to play on) 23...Bd6–/+ 24.Nce2 e5 (24...Nfe4 25.Ne4 Ne4 26.Qe1 ef5 27.Bd4–/+) 25.Bc3 (25.Qe1!?–/+) 25...e4–+ 26.Kh2?? (better is 26.Bf6 gf6 27.Nf4–/+) 26...Nd3 (26...Nh5 27.Qg1 Ng3 28.Ng3 Qg3 29.Kh1–+) 27.Bf6 Qf6 28.Qg1 Ra2 29.Rd1 Qf5 30.Ra1 Ra1 31.Qa1 h5 32.Nf4 Bf4?? 33.ef4+= Qf4 34.Qa8 Kh7 35.Qd5 h4 36.Qf5 Qf5–/+ 37.Nf5 g6 38.Nh4 Nc1 39.g3 Nb3 40.Ng2 Nd2 41.Ne3 Kg7 42.Kg2 Kf6 43.Kf2 Ke5 44.h4 f5 45.Ke2 Nf3 46.Ng2 Kd4 47.Nf4 Ne5 48.Ne6 Kc3 49.Nf4 Kc4 50.Ke3 Kc5 51.Ke2 Kd6 52.Ke3 Ke7 53.Nd5 Ke6 54.Nf4 Kf6 55.Nd5+= Kg7 56.Kf4 Nd3 57.Kg5 Nc5 58.h5? Ne6–+ 59.Kh4 g5 60.Kh3 Kh6 61.g4?? Nf4 62.Nf4 gf4 63.gf5 Kh5 64.f6 Kg6 65.Kg4 e3 (65...e3 66.f7 Kf7 67.Kf3 Ke6 68.Ke2 Kf5 69.Kf3 Ke5 70.Ke2 Kd4 71.Ke1 Kd3 72.Kf1 Kd2 73.Kg2 e2 74.Kf3 e1Q 75.Kf4 Qe7 76.Kg3 Ke3 77.Kg4 Qe5 78.Kh3 Kf3 79.Kh4 Qd5 80.Kh3 Qh5; 65...f3 66.f7 Kf7 67.Kg3 Ke6 68.Kf2 Kd5 69.Kg3 Kc4 70.Kf2 Kd3 71.Kg3 Ke3 72.Kg4 f2 73.Kf5 Kd4 74.Kf6 f1Q 75.Ke6 e3 76.Kd6 Qf7 77.Kc6 e2 78.Kb6 e1Q 79.Ka6 Qb1 80.Ka5 Qfa2) 0–1. Plock,Joerg (1675) – Winterstein,Holger (1890), Hamburg HSK DWZ op 1st, 2002.

9.c4 Nbd7 10.Qa4 Qb6 11.Bd3 (better is 11.Qc2!?+=) 11...Nc5–/+ 12.Bc2?? (better is 12.Qc2 Nd3 13.Qd3 dc4 14.Qc2–/+) 12…Na4–+ 0–1. Valpa – M54, playchess.de, 2002.

9.c4 Nbd7 10.cd5 cd5 11.Nf3 Qc7 (11...Bd6 12.Nc3=+) 12.Bb5= Bd6 (12...Be7=) 13.Bd7 (13.Bf6!? gf6 14.Nc3=) 13...Nd7=+ 14.0–0 0–0 (14...Ba6 15.d3–/+) 15.Nc3 (15.Qc1 Ba6 16.Qc7 Bc7–/+) 15...Ba6–/+ 16.Ne2 (16.Re1 Nc5–/+) 16...Qc4 (16...Bd3 17.Re1–/+) 17.Re1 Qd3 (17...Ra8 18.Nc1–/+) 18.Nf4=+ Qa3 (18...Qb5 19.Nd4 Qb7 20.Nh5=+) 19.Nh5 e5 20.Bc3 Bd3–/+ 21.Ng3 f6 22.Qa1 Qc5 23.Rc1 Qb5 24.Ne1 Bg6 25.Qa5 Qb3 26.h3 Rb8 27.Nf1 Qb7 28.Ra1 Nc5 29.Qa7 Qc6 30.f3 Bf5 31.Ng3 Bd7 32.Ne2 Na4 33.Rc1 Qb5 34.Kf2 Bc6 35.Qa5?? Qb7–+ (36.Nc2 Ra8–+ (36...Nc3?! 37.Qc3 Bb5 38.d3–/+); 35...Nc3?! 36.Qb5 Bb5 37.Nc3–/+) 0–1. Goetz – Walther,Ernst, corr BdF, 1970.

9.d4 c5 10.c4 cd4 11.ed4 Bb4 =+.

9.Nf3 Bb4 10.Bc3 Bc3 11.Nc3 0–0 12.Be2 h6 13.0–0 Ba6 14.Ba6 Na6 15.Qe2 Nc7 16.e4 Re8 17.d3 (17.e5 Nd7+=) 17...Re7 (17...e5 18.Ra1+=) 18.Ne5 (18.e5 Nd7+=) 18...Qd6= 19.Nf3 Re8 (19...e5 20.ed5 cd5 21.Rb1+=) 20.ed5 (20.e5!? Qc5 21.Na4+=) 20...cd5 21.Ra1 Qb4 22.Nd1 Qd6 ½–½. Valpa – MasterStefan, playchess.de, 2004.

9.Nf3 Nbd7 10.c4 =.

9.f4 Bc5 10.Nf3 =+.

9.f4 Bd6 10.Nf3 0–0 11.c4 Ne4 12.Bd3 Nc5=+ 13.Bh7 Kh7 14.Ng5 Kg6 15.Qg4= e5 16.Ne6 Kf6 17.fe5 Be5 18.Rf1 Ke7–/+ 19.Qg5 f6–+ 20.Nd8 fg5 21.Be5 Rf1?? 22.Kf1= Kd8 23.Bb8+= Nd7 24.Ba7 Ba6 25.Bd4 Bc4 26.Kf2 Nf6 ½–½. Jueptner,Kurt – Wedel,Gerhard, corr DDR, 1984.

9.f4 Nbd7 10.Nf3 c5 11.c4 (11.Bb5 Bd6=) 11...Be7 12.Bd3 (12.Be2 Nb6=) 12...Ba6 13.Qc2 h6 (13...0–0 14.0–0=) 14.0–0 (14.Bf6!? Bf6 15.cd5 Bd3 16.Qd3 ed5 17.Qd5+=) 14...0–0= 15.Na3 Qa5 16.Bb2 (16.Bc3 Qc7= (< 16...Qa3 17.Ra1 Qa1 18.Ba1+/–)) 16...Rb8 17.Ra1 (17.Rb1 Rb7=) 17...Qb6 18.Rb1 (18.Be5 Ne5 19.fe5 Nd7=) 18...Qd8 (18...Qb3 19.Bc3 Qc2 20.Rb8 Nb8 21.Bc2=+) 19.h3 (19.f5 Bd6=) 19...Rb4 20.Bc3 (20.Bf1 Bb7=) 20...Rb1=+ 21.Qb1 Qb6 22.Nb5 dc4 23.Bc4 Nd5 24.Qd3 N7f6 25.Be5 Nb4 26.Qe2 Nfd5 27.Kh2 Nc6 28.Na3 Ne5 29.Ne5 Bc4 30.Nac4 Qc7 31.g3 Nf6 32.Qf3+= Bf8 33.Qc6 Qc6= 34.Nc6 (34...Nd5 35.g4=). Schiffler,L – Ueberscher, Soemmerda, 1950.

9.f4 Nbd7 10.Nf3 Bd6 11.Be2 =.

9.f4 Be7 10.Nf3 0–0 11.Be2 c5 12.c4 Ba6 13.Qc2 Nbd7 14.0–0 h6 15.Re1 Ne8 (15...Qb6 16.Na3=) 16.Qa2 (16.cd5 Be2 17.de6 Bf3 18.ed7 Qd7 19.gf3 Nc7+=) 16...Bb7 (16...Bc4 17.Bc4 dc4 18.Qc4=) 17.Ne5 (17.cd5 ed5 18.Nc3 Nef6=) 17...Ne5 18.Be5 Bf6 19.Bf6 (19.Qa7 Qc8=) 19...Nf6=+ (< 19...gf6 20.Bf3+/–) 20.Bf3 Qc7 21.g3 Ra8 22.Qb2 Ra4 23.cd5 ed5 24.Rc1 Ba6 (better is 24...Ra7!?=+) 25.Nc3+= Rb4 26.Qa3 (26.Qa2 Bb7 27.Nd5 Bd5 28.Bd5 Rb8+/–) 26...Qd6+= 27.Nd5 Nd5 (27...Qd5 28.Bd5) 28.Bd5 Qd5 29.Qa6 c4 30.Qa2 Qd4?? (30...Qd3 31.Qc2 Qd5 32.f5+=) 31.Qc2 (better is 31.ed4 g6 32.d5+–) 31...Qd5+= 32.Qc3 Qb5 33.Kf2 Rb2 34.Qd4 Rb4 35.h4 Rb2 (35...Kh7 36.Qc3+=) 36.g4 (36.Rc4 Rd2 37.Qd2 Qc4+/–) 36...Ra2 (36...Rb4 37.Qd8 Kh7 38.Qe7+/–) 37.Kg3 (37.Rc4 Rd2 38.Qd2 Qc4+–) 37...Qb4 (37...Ra4!?+/–) 38.Qc4+– (38.Rc4?! Qb1 39.Rc8 Kh7+/–) 38...Qc4 39.Rc4 Rd2 40.Rc8 Kh7 41.f5 g5 42.fg6 ½–½. Thies,R – Markus,R, corr ICCF EU–I–GT–198, 1985.

9.Nf3 Bd6

10.c4 0–0=+ 11.cd5 (11.Bf6 Qf6 12.d4 Nd7=+) 11...ed5 12.d4 (12.Be2 Re8=+) 12...Ne4 13.Be2 (13.Bd3 Bb4 14.Nfd2 Qg5=+) 13...Qa5–/+ 14.Nbd2 Bb4 15.0–0? (better is 15.Bb2–/+) 15...Nd2 (15...Bd2 16.Qc2–+) 16.Nd2 Bd2 17.Qb3 (17.Qc2 Be1 18.Bb2 Qd2 19.Qd2 Bd2–+) 17...Ba6 (17...Bf5 18.Bb2–+) 18.Ba6 Na6 19.Bb2 Rb8 20.Ra1 (20.Qc2–+) 20...Qa1! 21.Ba1 Rb3 (22.Kf1 Rb1 23.Ke2 Bb4–+) 0–1. Zimmer – Bachmann, corr Germany, 1988.

10.Be2 0–0 11.0–0= Nbd7 12.c4 dc4 13.Bc4 Nb6 =.

10.Be2 0–0 11.0–0 Nbd7 12.c4 e5 13.cd5 cd5 14.Nc3 Qa5 15.Nb5 Bb8 16.Bc3 Qb6 17.Qa1 Re8 18.Rb1 Ne4 19.Ba5 Qh6 (better is 19...Qc6!?=) 20.Bc7+/– d4 (better is 20...Ba6!? 21.Bb8 Rb8 22.Ne5 Ne5 23.Qe5 Qd6+/–) 21.Bb8 Nd2? (better is 21...Nb8 22.Nc7 Re7+–) 22.ed4 (22.ed4 Nb1 23.Qb1 Nb8 24.de5+=; worse is 22.Nd2 Nb8 23.Nc7 Re7 24.Rb8 Rc7+–) 1–0. Krivoshapko,Alexander – Konin,Sergey, 2012.

10.Be2 0–0 11.0–0= Nbd7 12.d4 Qa5= 13.Nbd2 Ba6 14.Nb3 (14.c4 Rb8=) 14...Qa2 15.Ba6 (15.Ne5 Rb8 16.Ba6 Qa6+=) 15...Qa6 16.Nfd2 (16.Qd3 Ra8+=) 16...Ra8–/+ 17.Bc3 Qb5 18.Re1 Nb6 (18...Qb8 19.h3+=) 19.f3 (19.e4 de4 20.Ne4 Ne4 21.Re4 Qf5–/+) 19...Na4 20.Ba1 Bb4 (20...Qb8 21.g3+=) 21.Qe2 (21.e4 Nb6+=) 21...Nc3 (21...Qe2 22.Re2 Nb6 23.Nb1–/+) 22.Bc3 (22.Qb5 cb5 23.Nb1 Nb1 24.Rb1 Bd6+=) 22...Bc3+= 23.Qb5 (23.Qd3 Qd3 24.cd3 Ra2+=) 23...cb5–/+ 24.Kf2 Ra2 25.Rc1 Nd7 (25...b4 26.g4–/+) 26.Ke2 (26.e4 b4+=) 26...Nb6 (26...b4 27.e4+=) 27.Kd3 Bb2 (27...b4 28.e4+=) 28.Rf1 Nc4 29.Nb1 b4 30.N3d2 Ba3 31.Na3 ba3 32.Nc4+/– dc4 33.Kc3 Kf8 34.Rb1 Ke7 35.e4 h5 36.h4+/– g6 37.g3 Kd7 38.f4 Kc6 39.Rb4 Ra1 40.Ra4 Rg1= 41.Ra3 Rg3 42.Kb4 Rg4 43.Rf3 Rh4 44.Kc4 Rg4 45.Kd3 Rg1 46.c4 Ra1 47.e5+= Rc1 48.Rf2 Rd1 49.Ke4 Rc1 50.Kd3 Rd1 51.Rd2 Rf1 52.Ke3 Re1 ½–½. Zdechlik – Buczinski,Henryk, Poland, 1982.

10.Be2 Nbd7 11.c4 +=.

10.Be5 0–0 11.Bd6 (11.Nc3 Be5 12.Ne5 Qd6+=) 11...Qd6 12.d4 (12.Be2 e5+=) 12...Nbd7 13.Bd3 e5 14.de5 Ne5 15.Ne5 Qe5 16.0–0 (16.Nd2 Bg4 17.Qc1 c5+=) 16...Ng4 17.g3 Qh5 18.h4 g5 19.Kg2 (19.c4 gh4 20.Qd2 Nh2–+) 19...gh4–+ 20.Rh1 (better is 20.Qf3!?–+) 20...h3! 21.Kg1 (21.Rh3) 21...h2 22.Kg2 Ne3! 23.fe3 Bg4 24.Qe1 Bf3 25.Kf2 Bh1 26.Qh1 Ra8 27.Nd2 (27.Kg2 Ra1–+) 27...Ra1! 28.Nf1 c5 (28...c5 29.Kg2 c4 30.Qh2 Qh2 31.Nh2 cd3 32.cd3 Ra2 33.Kg1 Ra3–+) 0–1. towa (1815) – terrier (2120), gameknot.com, 2015.

9.Nf3 Be7

10.Be2 0–0 11.0–0 c5 12.c4 Ba6 13.cd5 ed5 14.d3 Nc6 15.Nbd2 Re8 16.Qa4 Nb4 17.Rb1 (better is 17.Qa3!?=) 17...Bd3–/+ 18.Bd3 Nd3 19.Ne5 Ne5 20.Be5 Qd7 21.Qc2 Qe6 22.Bf6 Qf6 (22...Bf6?! 23.Qc5 Rc8 24.Qb5=) 23.g3 Ra8 24.Nb3 h6 25.Rc1 Qe5 26.Qe2 c4 27.Nd4 Bc5 28.Nf3 Qf5 29.Rd1 Rb8 30.Nd4 Bd4 31.Rd4 c3 32.e4 Rb1 33.Kg2 Qc8 34.Qc2 (34.ed5 c2 35.Rc4 Qc4 36.Qc4 c1Q 37.Qc1 Rc1–+) 34...Rb2 0–1. hertford (2095) – DanQuigley (2355), ChessWorld.net, 2003.

10.Be2= 0–0 11.0–0 c5 12.c4 Bb7 13.cd5 Nd5 14.Nc3 =.

10.Be2= 0–0 11.0–0 c5 12.c4 Nc6 13.d4 dc4 14.Bc4 (14.dc5 Qd5=) ½–½. Plock,Joerg (1700) – Herzel,Alois (1810), Landesliga Ost1, 2002.

10.Be2= 0–0 11.0–0 c5 12.Ne5 Bb7 =.

10.Be2= 0–0 11.0–0 Nbd7 12.c4 =.

8.Be2 c4

9.d3 Qa5 10.Nd2 c3 11.Nb3 =.

9.d3 Bb4 10.Bc3 Bc3 11.Nc3 cd3 12.Qd3 =.

9.Nf3 Qa5 10.Nc3 Bd7 =.

8.Be2 Bd6

9.f4 Nbd7 10.Nf3 Qc7 11.0–0 0–0 12.Qe1 b6 13.Qh4 Bb7 14.Bb2 Ra8 15.Nc3 Ra7 (15...d4 16.ed4 cd4 17.Nd4=+) 16.Nd1 (16.Kh1 Be7=) 16...d4 (16...Ra2 17.Qg3=+) 17.c4 de3 18.de3. hooks – playwaycool, ChessWorld.net, 2006.

9.Nf3 0–0

10.c4 (--> 8.Nf3 Bd6 9.c4 0–0 10.Be2).

10.0–0 Nbd7

11.d3 Qa5 12.Nc3 Qc7 =+.

11.d3 Qa5 12.Nc3 e5 =+.

11.d3 e5 =+.

11.d4 c4

12.Nc3 Bb4 13.Na2 Be7 14.Bc3 =.

12.Nc3 Qc7 13.Bb2 =+.

12.Nc3 Qa5

13.Qb1 b6 14.Rd1 Bb7=+ 15.Bb2 (15.e4 Bf4 16.e5 Ne4 17.Ne4 de4=+) 15...Ra8–/+ 16.Qa1 Qb4 17.Qb1 Ne8 18.Ng5 (18.Ba1 Qa5–/+) 18...Nc7 19.Bh5 (19.e4 Be7 20.Nf3 Nb5 21.Nb5 Qb5–/+) 19...g6 20.Be2 Nb5 21.Nb5 Qb5 22.Bg4 (22.Nf3 Ra4 23.c3 Ba3 24.Ba3 Qb1 25.Rb1 Ra3–+) 22...Bf8 (22...h6 23.Nh3–+) 23.Bc3 (23.Be2 Qb4–/+) 23...Qb1–+ 24.Rb1 Ra2 (24...Bc6 25.Ne6 fe6 26.Be6 Kg7 27.Kf1–+) 25.Ne6 –/+.

13.Qb1 b6 14.e4 Ne4 15.Ne4 de4 =.

13.Qb1 Qc7 14.Bb2 =+.

13.Qb1 Rd8 14.Bb2 =+.

9.Nf3 Nbd7

10.0–0 0–0 11.Bb2 e5 12.d3 Qc7 13.Nfd2 Nb6 14.c4 Be6 15.cd5 Nfd5 16.Nc4 Nc4 (16...Ra8 17.Nd6 Qd6 18.Nd2=+) 17.dc4 =.

10.0–0 0–0 11.d4 b6 12.c4 (12.dc5 bc5 13.c4 Qb6=) 12...Bb7 13.cd5 ed5 (13...Bd5 14.Nc3=) 14.Bd3 (14.dc5 bc5 15.Nc3 Re8=) 14...c4=+ 15.Bf5 g6 16.Bh3 Qe7 (16...Ne4!?=+) 17.Nc3+= Ra8 18.Bb2 (18.Qc2 Ra5=) 18...Ba3 (18...Ne4!?=+) 19.Ba3 +=.

10.0–0 0–0 11.d4 c4 12.Nc3 =+.

10.0–0 e5 11.d3 =+.

10.0–0 e5 11.Nh4 =.

10.c4 0–0 (--> 8.Nf3 Bd6 9.c4 0–0 10.Be2 Nbd7).

10.c4 dc4 11.Na3 Nb6 =.

8.Be2 Bd7

9.Be5 c4 10.Nc3 Bb4 11.Qb1 Bc5 12.Nf3 0–0 13.Qb2 Be8 14.d3 cd3 15.cd3 Nbd7 16.Bg3 Be7 17.d4 Nh5 18.Bd3 Qa5 (18...f5 19.Be5=) 19.Bh4 +=.

9.Be5 Ne4 =.

8.Be2 Nbd7

9.f4 Qa5 10.Bc3 Qa4 11.Nf3 =.

9.f4 Qa5 10.Bc3 Qb6 11.Nf3 c4 12.0–0 (12.Nd4 Ne4=) 12...Qb5=+ 13.d3 Bc5 14.Bd4 cd3 15.Bd3 Qa5 (15...Qc6 16.Ne5 Qc7 17.Nd2=+) 16.Nbd2 (16.Nfd2 Qc7–/+) 16...Qc7 17.Ne5 0–0 18.Qf3 Rd8 (18...Ne5 19.fe5 Nd7 20.Nb3–/+) 19.Qh3 h6 20.Qg3 b6 (20...Ne5 21.Be5 Qe7 22.Ra1=+) 21.Bb2 (21.Ra1 Bb7=+) 21...Nh5 (21...Be7 22.Ra1=+) 22.Qf3 Nf4 23.Nf7 Kf7 24.Qg3 (24.Kh1 Kg8 25.ef4 Bd6=+) 24...e5 25.Kh1 Be3 26.Qe3 Qc5 27.Qc5 bc5 28.g3 g5 29.gf4 gf4 30.Bb5 Ke6 31.Re1 e4 32.Ne4 de4 33.Re4 Kd6 34.Rf4 ½–½. Bendig,Frank – Woischke,Norbert, corr TKM/Final, 2003.

9.f4 Nbd7 10.Nf3 Qb6 11.0–0 =.

9.f4 Bd6

10.Nf3 0–0 11.0–0 Qa5 12.Bb2 c4 13.Nc3 (13.Nd4 Nc5 14.d3 Na4 15.Ba1 c3 16.Nb3 Qc7 17.Nd4 e5 18.fe5+=; 13.Be5 Bb4 14.d3 Ne5 15.fe5 Ng4 16.Qc1 cd3 17.Bd3 Qc7 18.Kh1–/+) 13...Qb4 14.Qc1 Re8 15.Nd4 Bc5 16.Re1 Qa5 17.Nf3 Rd8 18.Rf1 =.

10.Nf3 0–0 11.0–0 Qa5 12.Bb2 Qc7 13.Nc3 (13.Qe1 b6 14.Qg3 Bb7 15.Na3 Ra8 16.Ra1 c4 17.Nb1 Ra1 18.Ba1+=; 13.c4 dc4 14.Na3 c3 15.Bc3 Rd8 16.Nc4 Nd5 17.Qc2 b6 18.Ng5+=; 13.Qc1 b6 14.Qe1 Bb7 15.Qh4 Ra8 16.Nc3 d4 17.ed4 Bf4 18.dc5=) 13...e5 (13...Re8 14.Qe1 e5 15.fe5 Ne5 16.Ne5 Re5 17.b6 Qb6 18.Nb5=) 14.Ne5 (14.b6 Qb6 15.fe5 Ne5 16.Ne5 Qb2 17.Nd3 Qa3 18.Rf6+=) 14...Ne5 15.fe5 Be5 16.Rf6 gf6 (worse is 16...Bf6 17.Nd5 Qd6 18.Nf6 gf6 19.Bd3+/–) 17.Nd5 Qd6 (17...Bh2 18.Kh1 Qa5 19.Nf6 Kg7 20.Bd3+–) 18.Be5 fe5 19.Bf3 f5 20.d3 Be6 21.c4 Ra8 22.Qe1 e4 23.de4 fe4 24.Be4 Qe5 25.Qg3 Qg3 26.hg3 Kg7 27.Nb6 Rd8 28.Kf2 (28.Bb7 Rb8 29.Na4 Rb7 30.Nc5 Rb6–+) 28...Rd6 29.Nd5 Bd5 30.Bd5 Rf6 31.Ke2 b6 32.Kd3 Rf2 33.Bf3 Kf6 ½–½. pcmvr (2765) – aspasio (2875), net–chess.com, 2014.

10.Nf3 0–0 11.0–0 Qa5 12.Bb2 Rd8 13.Qe1 (13.Bc3 Qc7 14.Bb2 b6 15.Qe1 e5 16.fe5 Ne5 17.Qh4 Ng6 18.Qa4+=; 13.Qc1 c4 14.Nc3 Bb4 15.Nd4 Bc5 16.d3 Nb6 17.Nd1 Bd7 18.Bc3=) 13...c4 14.Nd4 Qa2 15.Qc1 Bc5 16.d3 cd3 17.Bd3 Qa4 18.Qe1 =.

10.Nf3 0–0 11.0–0 Qa5 12.Bc3 A) 12...Qb6 13.Qc1 (13.Bb2 c4 14.Nd4 e5 15.fe5 Be5 16.d3 Qc7 17.g3 Re8 18.Bf3+=; 13.Qe1 c4 14.Nd4 Ne4 15.d3 Nc3 16.Nc3 Qc7 17.dc4 Nb6 18.c5=) 13...Ne4 14.Qb2 Nc3 15.Nc3 c4 16.Ra1 Re8 17.Na4 Qd8 18.Qd4=; B) 12...Qc7 13.Qe1 (13.Bb2 b6 14.Qe1 Bb7 15.Qh4 Ra8 16.Nc3 d4 17.ed4 Bf4 18.dc5=; 13.Ba1 b6 14.Qe1 Bb7 15.Qh4 Be7 16.Qg3 d4 17.ed4 Nh5 18.Qf2+=) 13...b6 14.Qh4 Bb7 15.Bb2 Ra8 16.Nc3 d4 17.ed4 Bf4 18.dc5=.

10.Nf3 0–0 11.0–0 Qc7 12.c4 (12.Qe1 b6=) 12...b6 13.cd5 (13.Bb2 Bb7=) 13...ed5 14.Nh4 Bb7 15.Bb2 g6 (15...d4 16.Nf5=+) 16.Nf3= Re8 17.Na3 Ne4 18.Qc2 (18.d3 Nef6 19.Qd2 d4–/+) 18...c4 (18...Ra8 19.Ra1=) 19.Nb1 (19.Nd4 Bb4 20.d3 Nec5 21.dc4 Re3=) 19...Ndc5 20.Nc3 Ra8 21.Ne4 ½–½. Bendig,Frank (2110) – Vaassen,Jack (2095), CA.2002.0.00031, 2002.

8.Nf3 Qa5

9.Bc3 Qa4 10.Be5 Nbd7 A) 11.Bf4 c4 (11...Qa5 12.c4 Nh5 13.Be5 Ne5 14.Ne5 Nf6 15.f4 Bd6 16.Bd3 Be5+=; 11...Qa1 12.Nc3 Qd1 13.Kd1 d4 14.ed4 cd4 15.Ne2 Ne4 16.Ke1 f6=; 11...Ne4 12.Ng5 e5 13.Ne4 Qe4 14.Nc3 Qf5 15.Bg3 Nf6 16.b6 c4=) 12.Nc3 Qa5 13.Qb1 Nh5 14.Bg5 h6 15.Bh4 g5 16.Bg3 g4–/+; B) 11.Nc3 Qa5 (11...Qb4 12.Bg3 d4 13.ed4 cd4 14.Na2 Qa4 15.Nc1 Ne4 16.Bf4 Bd6=; 11...Qa3 12.Be2 Ne5 13.Ne5 Bd6 14.f4 Be5 15.fe5 Nd7 16.0–0 Ne5+=; 11...Qg4 12.Bf4 c4 13.h3 Qh5 14.Be2 g5 15.Bg5 Qg6 16.Bf6 Qf6+=) 12.Be2 Ne5 13.Ne5 c4 14.0–0 Bb4 15.Qa1 Bc3 16.Qc3 Qc3–/+; C) 11.Bc7 Be7 (11...Qg4 12.Nc3 Be7 13.Be2 Ne4 14.0–0 Nc3 15.dc3 c4 16.Nd2 Qg6=; 11...c4 12.Nc3 Qa3 13.Be2 Bb4 14.Nb1 Qa7 15.c3 Be7 16.Nd4 Qc5=; 11...Ne4 12.Bd3 Be7 13.0–0 Qb4 14.c4 Nd6 15.cd5 ed5 16.Nc3 Nf6=) 12.Be2 c4 13.Nc3 Qb4 14.0–0 0–0 15.Qa1 Qc5 16.Bf4 Ne4+=.

9.Bc3 Qa4 10.Bf6 gf6 11.Nc3 Qb4 (11...Qg4 12.g3 Qb4 13.Be2 Bd6 14.Qa1 Nd7 15.0–0 Qg4 16.Ne5 Qg5+=; 11...Qa5 12.Be2 Bd6 13.0–0 Qb4 14.Qa1 Qg4 15.b6 Rg8 16.g3 Kd8+=; 11...Qa3 12.Be2 Bd6 13.g3 Qb4 14.Qa1 Nd7 15.0–0 Qg4 16.Ne5 Qg5+=) 12.Qa1 Rg8 13.g3 Bd6 14.Qd1 Nd7 15.Qe2 Qb2 16.Qd1 c4=.

9.Bc3 Qa4 10.Bf6 gf6 11.Be2 Bg7 (11...Bd6 12.0–0= (12.Nc3 Qb4 13.0–0 Rg8 14.Kh1 Nd7 15.Ne1 c4 16.Nf3 f5=) 12...Qg4 13.d4 Rg8 14.g3 Qg6 15.dc5 Bc5 16.Bd3 f5=; 11...Qb4 12.c3 Qb2 13.c4 dc4 14.Bc4 Qb4 15.Qc2 Nd7 16.0–0 Nb6+=) 12.0–0+= f5 13.Qc1 (13.d4 f4+= 14.ef4 cd4 15.Qd2 Bd7 16.Qd3 0–0=) 13...c4= 14.d3 0–0 (14...Qb5 15.dc4 dc4 16.Na3+= Qc5+=) 15.dc4+= dc4 16.Nbd2 (16.Rd1 Nd7+=) 16...c3 17.Nb3 Bd7 18.Nfd4 f4 (18...Qb4 19.f4+=) 19.Bd3 (19.Rd1 fe3 20.Qe3 Qb4+=) 19...Qb4 (19...e5 20.Nc5 Qb4 21.Nd7 Nd7 22.Nf5+=) 20.Qd1+= f5 21.Qh5 Qd6 (21...b6 22.Ra1+=) 22.Bc4 Kh8 23.Rd1 fe3 24.Ne6 ef2 25.Kf1 (25.Kf2!? Qb6 26.Ned4+=) 25...Qb4+= 26.Qe2 Rc8 27.Nbc5 Rc5 28.Nc5 Qc5 29.Rd7 Nd7 30.Qe8 Qf8 31.Qd7 b6 32.Qd5 Bf6 (32...Qe8 33.Kf2 f4 34.Kf1=) 33.Kf2 (33.Qf5 Bg7 34.Qd5 Bf6+/–) 33...Qd8 (33...Be7+=) 34.Qe6 (better is 34.Qf5!? Bd4 35.Kf3+/–) 34...Qd4= 35.Ke2 Qe5 (35...Kg7 36.Qg8 Kh6 37.Bd3=) 36.Kf3 Qe6 (36...Kg7 37.Qf7 Kh6 38.Bd3=) 37.Be6+= Kg7 38.Bf5 h6 (38...Be5 39.g3+=) 39.Ke4 Be7 40.Kd5 Bc5 41.Kc4 Bg1 (41...Kf6!? 42.Bd3 Bd6+=) 42.h3 Bf2 43.Kc3 Bc5 (43...Bg3 44.Kd4+/–) 44.Kd3 Bg1 45.Ke4 Bc5 ½–½. Botvinnik,Ilya (2440) – Khmelniker,Ilya (2195), TCh–ISR, ISR, 2002.

9.Bc3 Qa4 10.Bf6 gf6 11.h3 Bd6 (11...Qb4 12.c3 Qb2 13.c4 dc4 14.Bc4 Qb4 15.Qc2 Bd7 16.Qd3 Bg7+=; 11...c4 12.d3 e5 13.dc4 dc4 14.Nfd2 Be6 15.Qf3 Nd7 16.Qb7 Qc2=; 11...Qa5 12.c4 dc4 13.Bc4 Qb4 14.Qc2 Nd7 15.0–0 Ne5 16.Ne5 fe5+=) 12.Nc3 Qb4 13.g3 Nd7 14.Bg2 Rg8 15.Qe2 Qb2 16.Qd3 f5 =.

9.Bc3 Qb6 10.Bf6 gf6 11.c4 d4 12.Bd3 e5 (12...Bd6 13.0–0=) 13.Qc2 h6 14.Bf5 Qc7 (14...Bf5!? 15.Qf5 Qe6+=) 15.Bc8+/– Qc8 16.Qe4 Nd7 17.d3 (17.0–0 h5+/–) 17...Be7 (17...Qc7 18.0–0+/–) 18.0–0 Nf8 19.Nh4 Ne6 20.Nf5 Ng5 (20...Bf8 21.Nd2+/–) 21.Qg4+– (21.Ne7?! Ke7 22.Qh4 Rg8+=) 21...h5?? (better is 21...Qd7 22.f4 Ne6 23.Ng7 Kd8 24.Ne6 Qe6+/–) 22.Nd6!! (22...Bd6 23.Qc8 Ke7 24.Qh8+–) 1–0. guest706 – guest7841, ICC, 2005.

9.Bc3 Qd8 10.Be5 Nbd7 11.Bf4 =.

8.Nf3 c4

9.d3 Qa5 10.Bc3 Bb4 11.Qd2 Bc3 12.Nc3 Qb5?? 13.Nb5+– 1–0. mrkt – tahirk, internet, 2007.

9.Be5 Nbd7+= 10.Bf6 Nf6 11.c3 Qa5 12.Nd4 (12.d3 Qb5 13.dc4 dc4+=) 12...Bc5 (12...e5 13.Nf3 Bd6 14.Be2–+) 13.Be2 (13.d3 Bd4 14.ed4 Qb5–/+) 13...Bd4 14.ed4 Bd7 15.0–0 Bb5 16.Qc1 0–0 17.Na3 Bd7 18.Nc2 Ra8 19.f3 Ne8 20.Qb2 b5 21.Ra1 Qd8 22.Nb4 Nc7 23.d3 Ra1 24.Qa1 Qa8 25.Qa8 Na8 26.dc4 bc4 27.Bd1 Nb6 28.Kf2 Ba4 29.Ke2 Kf8 30.Ba4 Na4 31.Kd2 Ke8 32.Nc6 f6 33.h4 Kd7 34.Nb4 Kd6 35.g3 e5 36.g4 g6 37.Nc2 f5 38.gf5 gf5 39.de5 Ke5 40.Nd4 h5 41.Ne2 Nc5 (better is 41...f4!? 42.Nd4 Nc5 43.Nc6 Kd6–+) 42.Ke3–/+ Ne6 43.f4 Kd6 44.Ng3 Ng7 45.Kd4 Ne6 46.Ke3 d4 47.cd4 c3 48.Nf5 Kd5 Exerts pressure on the isolated pawn 49.Kd3 Nf4 50.Kc3 Ke4 51.Ng7 Ne2 ½–½. Hal1958 – Matu, playchess.de, 2005.

8.Nf3 Bd6

9.Nc3 0–0 10.Qb1 (10.Be2 e5+=) 10...Nbd7 11.Ne2 (11.Qa2 Nb6+=) 11...b6 (11...e5 12.Ng3–/+) 12.Ng3+= Bb7 (12...e5 13.Nf5 Bc7 14.Be2+=) 13.Be2 Qc7 14.0–0 Ra8 15.Qb2 (15.d3 e5+=) 15...Bf8 (15...c4 16.Re1+=) 16.h3 (16.Re1 Ne4+=) 16...Qb8 (16...Bd6 17.Kh2–/+) 17.Nh2 (17.Qc3 Bd6–/+) 17...Qa7 (17...Ra4 18.Nf3–/+) 18.Ng4 Qa2 (18...Ng4 19.Bg4 Qa2 20.Rb1+=) 19.Qc1 (19.Nf6 Nf6 20.Qc1 Be7+=) 19...Ra5 (19...Ng4!? 20.hg4 Bd6–/+) 20.Nf6= Nf6 21.Bf6 gf6 22.Nh5 Be7 23.d3 (23.d4 Qa3=) 23...Qa3 24.Qd2 (24.Qe1 Qb2= (worse is 24...Rb5 25.f3 Kf8 26.Qg3+/–)) 24...Qb4 (24...Qb2 25.d4 Ra2 26.dc5 bc5 27.e4+=) 25.c3 (25.Qb4 cb4 26.d4 Bc8=) 25...Qb5 (25...Qh4 26.c4=) 26.e4 The mate threat is Qh6 26...Qe8 27.Qf4 (27.Qh6 Qf8 28.Nf6 Bf6 29.Qf6 de4 30.Qg5 Kh8 31.Qe5 Kg8 32.de4 Ra8+/–) 27...Qf8 (27...Qd8 28.Qg3 Kf8 29.Qg7 Ke8 30.Bg4+=) 28.Rb1+= Bd8 (28...Kh8 29.ed5 Bd5 30.Nf6 Bf6 31.Qf6 Qg7 32.Qd8 Qg8 33.Qg8 Kg8 34.c4+/– (34.Rb6?! Ra1 35.Kh2 Ra2+=)) 29.c4 (29.Nf6 Bf6 30.Qf6 Qd6+/–) 29...Ra2 (29...de4 30.de4 h6+=) 30.Rb3 (30.ed5!? e5 31.Qf5+/–) 30...Kh8 (30...dc4 31.dc4 Kh8 32.Bd3=) 31.Bf3 de4 32.Be4 Be4 33.de4 Rc2 34.Rg3 Rc4?? 35.Nf6+– Rd4 36.Qh4 Qg7 37.Rg7 (37.Rg7 Rd1 38.Kh2 Bc7 39.Rg3 Bg3 40.Qg3 Rd8 41.Nh5 Rg8 42.Qe5 f6 43.Qf6 Rg7 44.Qg7#) 1–0. Lerch,Reinhold – Steinmueller,I, corr DDR–Cup, 1984.

9.Nc3 e5 10.Ne2 e4 11.Ne5 –/+.

9.c4 b6 10.Be2 Bb7 11.0–0 0–0 12.d4 Qc7 (12...Nbd7 13.cd5 ed5 14.dc5 bc5 15.Bb2+=) 13.Nbd2 (better is 13.dc5!? Qc5 14.cd5 Bd5 15.Nc3=) 13...cd4–/+ 14.ed4 Ne4 15.h3 Nd2 16.Nd2 Nd7 17.Qb3 Rc8 (17...Bh2 18.Kh1 Bf4 19.Bc3–/+) 18.g3+= Nf6 19.Bb2 h5 20.h4 dc4 21.Bc4 (21.Nc4 Qd8=) 21...Ba8 22.f4? (better is 22.Re1+=) 22...Qb7–+ 23.Kf2?? (23.Nf3 Ne4 24.Be6–+) 23...Ne4 24.Ne4 Qe4 25.Qd3 (25.Qc3 Qg2 26.Ke1 Rc4 27.Qc4 Qb2 28.Rg1–+) 25...Qg2 26.Ke3 White prepares the advance f5 26...Qb2 (better is 26...Bd5 27.Bb3 Qb2 28.Rf2 Qc1 29.Qd2 Qc3 30.Qc3 Rc3 31.Kd2 Rb3 32.Rf1–+) 27.f5 (27.Qe2 Qc3 28.Bd3–+) 27...ef5 28.Bf7 Kh8 29.Rb1 Qg2 30.Qf5 Rc3 31.Qd3 Rd3 32.Kd3 Be4 33.Kc3 Qc2 0–1. Svitek,Volker (2140) – Lantzsch,Christian (2210), Hessenliga, 2006.

9.d4 c4!? –/+.

9.d4 cd4 10.ed4 Qa5 11.Bc3 Qb6 12.Be2 =.

9.d4 cd4 10.ed4 Qa5 11.Nc3?? Ne4–+ 12.Bd3 Bb4 13.0–0 Nc3 14.Qc1 Ne4 15.Be4 de4 16.Ng5 f6 17.Ne4 0–0 18.Qf4 Nd7 19.Ng3? Qb5 20.Qh4 Qg5 21.Qe4 Nb6 22.d5 Nd5 23.h4 Qf4 24.Qe2 Nc3 25.Qc4 Qc4 26.h5 b6 (27.h6 Ne4 28.hg7 Kg7–+) 0–1. toll – zerdeja01 (1605), ICC, 2003.

9.d4 cd4 10.ed4 Ne4 =+.

9.d4 cd4 10.Bd4 Nbd7 =.

9.Be2 0–0 10.0–0 Qb6 11.c4 Bd7 (11...Nbd7!?=) 12.Bf6+= gf6 13.d4 dc4 14.Bc4 Bb5? (14...cd4 15.Nd4 e5 16.Nc6+=) 15.Bb5?? (better is 15.Qb3+–) 15...Qb5= 16.dc5 Qc5 17.Qd4 (17.Nbd2 f5+=) 17...e5 (17...Qd4 18.Nd4 Nc6 19.Nc6 bc6 20.Rc1–/+) 18.Qc5 (18.Qh4!?=) 18...Bc5+= 19.Nc3 Rd8 20.Ne4 Be7 21.Rb1 f5 (21...b5!?+=) 22.Ng3= f4 23.Nf5 (23.Rb7? fg3 24.hg3 Rd1 25.Kh2 Nd7–+) 23...Bf6 24.e4 Na6 25.Nh6 Kg7 26.Ng4 b5 (better is 26...Nc5!?–/+) 27.Nfe5= (worse is 27.Nf6 Kf6 28.g3 b4–/+) 27...Be5 28.Ne5 b4 29.f3 Rb8 30.Nd3 Attacking the isolated pawn on b4 30...Kf6 31.Nf4 Ke5 32.g3 Kd4 33.Kf2 b3 34.Ke2 Kc3 35.Kd1 Nc5 36.Nd5 Kd4 37.Kd2 Ra8–/+ 38.h4? Ra2–+ 39.Ke1 Nd3?? 40.Kd1= b2 41.Kc2 Ra1 42.Rb2 Nb2–/+ 43.Kb2 Rf1 44.f4 f5 45.Nf6? fe4 46.Nh7 e3 47.Ng5 e2 0–1. Hal1958 – Mosselman, playchess.de, 2004.

9.Be2 0–0 10.0–0 Nbd7 11.d4 c4 12.Nbd2 Qa5 13.e4 Bb4 (worse is 13...Qb5 14.e5+/–) 14.e5 Ne8 15.Bb2 Nc7 16.Qc1? (16.b6 Nb6 17.Nb1 Bd7–/+) 16...Nb5 (16...c3 17.Nb3 cb2 18.Qb2–+) 17.Rd1? (better is 17.Ba1–/+) 17...c3–+ 18.Nb3 (18.Qa1 Nd4 (18...cd2 19.Qa5 Ba5 20.Bb5+=; 18...cb2?! 19.Qa5 Ba5 20.Bb5–/+) 19.Nd4 cb2 (19...cd2?! 20.Qa5 Ba5 21.Nf3–/+) 20.Qa5 Ba5–+) 18...cb2 19.Qb2 Qa3 20.Qa3 Na3 21.Ra1 (21.Rc1 Bc3–+) 21...Nc2 22.Ra4 Nb6 23.Ra2 (23.Ra7 Bc3–+) 23...Na3 24.Nc5 Nbc4 25.Bc4 Nc4 26.Ra4 Bc5 27.dc5 Bd7 28.Ra7 Bc6 29.Nd4 (29.Kf1 f6 30.ef6 Rf6–+) 29...Ne5 30.Kf1 Nd3 31.Nb3 e5 32.Ke2 Nf4 33.Kf1 d4 34.g3 Ne6 35.Ke2 Bd5 (35...Bd5 36.Nd2 Nc5–+) 0–1. Mittelstaedt,Joel – Niedermayer,Julian Andi, GER–chT U12 Leipzig, 2008.

9.Be2 Nbd7 10.0–0 =+.

9.Be5 0–0 =.

9.Be5 Be5 10.Ne5 Nbd7 11.Nd7 Bd7 =+ (< 11...Kd7 12.Be2+=).

9.Bf6 Qf6 10.c4 Nd7 11.Nc3 Nb6 12.Qb3 Qg6 13.cd5 ed5 14.Qa2 0–0 15.h4 Re8 16.h5 Qf5 17.Qa7 Bc7 18.h6 d4 19.Nd1 g5 20.Rh5 f6 21.Be2 de3 22.de3 Qg6 23.Nd2 Qf5 (23...Rd8 24.Qa2 Kh8 25.Kf1–/+) 24.Nc3 Kh8 25.Bf3 (better is 25.Qa1!?–/+) 25...Qc2–+ 26.Nce4? (better is 26.Nd1–+) 26...Qc1 27.Ke2 (27.Bd1 Bg4 28.f3 Bh5 29.Qb7–+) 27…Bd7 (28.Nd6 Ra8–+) 0–1. kamret (2220) – zinga (2345), GameColony.com, 2003.

9.c4 0–0

10.Qb3 Nbd7 11.d3 dc4 12.dc4 b6 13.Be2 Bb7 14.0–0 Qc7 15.h3 e5 16.Nc3 Re8 17.Nd5 Nd5 18.cd5 e4 19.Nd2 Be5 20.Bc4 Qd6 21.Be5 Re5 d5 seems the pivot of the position 22.Ra1 Nf6 Will d5 fall? (worse is 22...Rd5 23.Ne4 (23.Bd5?! Bd5 24.Qd1 Qe5+=) 23...Qe5 24.Ra7 (24.Bd5 Qa1 25.Kh2 Qe5 26.Ng3 Bd5–+) 24...Qe4 25.f3+– (25.Rb7? Rg5 26.g4 Qb7–+)) 23.Ra7 Re7 (23...Bd5?? 24.Bd5 Kh8 25.Bc6+–) 24.Qa4 Kf8 (24...Bd5?? 25.Re7 Qe7 26.Bd5+–; 24...Nd5?? 25.Ra8 Ba8 26.Qa8 Re8 27.Qe8 (27.Qd5? Qd5 28.Bd5 Rd8–+) 27...Qf8 28.Qf8 Kf8 29.Bd5+–) 25.g4 h6 26.Bb3 (26.Qa2 A) worse is 26...Nd5 27.Rb7 Rb7 28.Ne4+– (28.Bd5 Rd7–+); B) 26...Qe5–/+) 26...Bd5 27.Nc4 Ra7 28.Qa7 Qe6 29.Qa2 g5 30.Kg2 h5 31.gh5 Nh5 32.Nd2 Bb3 33.Nb3 Nf6 34.Qa8 Kg7 35.Nd2 Kg6 36.Qa4 Kf5 37.Nc4 Nd7 (37...Nd5 38.Qd1–+) 38.Nd2 (38.Qc2!? g4–+) 38...Qd5 39.Nc4 Ke6 40.Qc2 f6 41.Qc3 Qd3 42.Qc1 (better is 42.Qd3 ed3 43.Nb2–+) 42...Kd5 43.Na3 Ne5 44.Qb2 Ke6 45.Nc2 (45.Nb1–+) 45...Nf3 46.Qb1 (46.Qa2 Kf5 47.Nd4 cd4 (47...Nd4?! 48.Qd5 Kg6 49.Qg8 Kh6 50.Qh8 Kg6 51.Qg8 Kf5 52.Qd5 Kg6 53.Qg8=) 48.Qd5 Ne5 49.ed4 Qf3 50.Kf1 Qh3 51.Kg1 Qd3–+) 46…Qc2!! (46...Qc2 47.Qc2 Ne1 48.Kf1 Nc2–+) 0–1. Ilushenko,Yuru – Rudyak,Ivan, Stavropol–6, 2000.

10.Qc2 Nbd7 11.Bd3 b6 12.h4 (12.cd5 ed5 13.0–0 Re8=) 12...Bb7 13.Rh3 Qa8 14.Bb2 e5 15.cd5 Bd5 16.Nc3 e4 17.Nd5 Qd5 (worse is 17...ed3 18.Nf6 Nf6 19.Qd3+=) 18.Bc4 Qf5 19.Ng1 Be5 20.d4 cd4 (20...ed3!? 21.Bd3 Qg4–/+) 21.ed4+= Bd6 22.Ne2 Ng4 23.Rf3 (23.Nc3 Ndf6+=) 23...Qg6–/+ 24.h5 Qh5 25.Qe4 Ndf6 26.Qf5 (26.Qc6!? Qh1 27.Kd2–/+) 26...Qh1–+ 27.Kd2 Qg2 28.Kc2? (better is 28.Nc3–+) 28...g6 29.Qd3 Nf2 (29...Rc8 30.Rf6 Nf6 31.f3–+) 30.Qb3? (30.Nf4 Bf4 31.Qe2–+) 30...N2e4 31.d5 (31.Kd1–+) 31...Rc8 32.Rc3 (32.Qd3 Rc4! 33.Qc4 Qf3 34.Bf6 Nf6–+) 32...Nc3 (32...Nd5 33.Bd5 Qe2 34.Kb1 Qe1 35.Rc1 Rc1 36.Bc1 Nd2 37.Kc2 Nb3 38.Bb3 Qe4 39.Kb2 Be5 40.Ka2–+) 33.Qc3 Qe4 (33...Qg4 34.Kd1 Be7 35.d6 Rc4 36.Qd2–+) 34.Kb3 Be5 35.Nd4 Nd5 36.Qh3 (36.Qd3 Qd3 37.Bd3–+) 36...Rc4 37.Kc4 Ne3 38.Kb3 Qd5 (38...Qd5 39.Kc3 Qd4 40.Kb3 Qc4 41.Ka3 Bd6#) 0–1. Sandipan,C (2420) – Barua,D (2555), ch–IND, Mumbai IND, 2000. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.e3 Bd6 9.c4 0–0)

10.Qc2 Nbd7 11.Be2 dc4 (11...Nb6 12.d3=) 12.Bc4 (12.Na3 Nb6=) 12...Nb6 13.Ng5 (13.Be5 Nc4 14.Qc4 b6+=) 13...e5+= (13...Nc4?? 14.Bf6 g6 15.Bd8 Ne3 16.fe3 Rd8 17.Ne4+–) 14.f4 (14.Na3!?+=) 14...Nc4–/+ 15.Qc4 ef4 16.Qc2 (16.0–0 fe3 17.Bf6 gf6 18.Ne4 ed2 19.Nbd2–/+) 16...g6 (16...fe3 17.Bf6 ed2 18.Kd2 Bf4 19.Ke2 Re8 20.Kf3 Qd5 (worse is 20...Qf6 21.Qh7 Kf8 22.Ne4 Re4 23.Qe4 Bg5 24.Ke2–+) 21.Ne4 Bd6–+) 17.Qc3= Be7 18.Ne4 Kg7 (18...Ne4 19.Qh8 A beautiful mate combination) 19.0–0+= (19.Nc5? Qd5 20.Nd3 Qg2–+) 19...Bf5 20.Nc5 (better is 20.Rf4!? Be4 21.Re4+=) 20...Qd5+= 21.Nb3 (21.e4 Qc5 22.Qc5 Bc5 23.d4 Ne4 24.dc5 f6 25.c6 bc6 26.bc6–/+) 21...Rc8–/+ (21...Qb5?! 22.Nd4 Qd7 23.Nf5 (23.Rf4? Bb1 24.Qb3 Bf5–+) 23...Qf5 24.Qc7+= (worse is 24.ef4 Rd8=)) 22.Qe5 Qe5 (22...Qb3 23.Qe7 Qe6 24.Qe6 (worse is 24.Qb7 fe3 25.Qa6 Qa6 26.ba6 Ra8=) 24...fe6 25.ef4+/–) 23.Be5 fe3 24.de3 Bd3 25.Re1 (25.Rd1 Bb5 26.Nc3 Bc6–/+) 25...Bb4 (25...Bb5 26.Nc3 Bc4 27.Nd2–/+) 26.Rd1 Bb5 27.Nd4 Ba6 (27...Bc4 28.Nd2 Bd5 29.e4–/+) 28.Nd2 Bd2 29.Rd2 Kf8 30.Nb3 Ng4 31.Bd4–/+ Re8 32.Nc5 Rc8 33.h3= Nh6 34.Nd7 Ke7 35.Nf6 Nf5–/+ 36.Bb2 Ne3 37.Rd4 Rc4 38.Rd7 Ke6–+ 39.Rd8 Bb5 40.Nh7?? Rc2 41.Ba3 Rg2 42.Kh1 Bc6 43.Nf8 Kf5 44.Bd6 Rg3 45.Kh2 Nf1# 0–1. Staszewski,M – Buczinski,Henryk, Katowice Poland, 1968.

10.d3 Nbd7 11.Nbd2 b6 12.Be2= Bb7 13.Qc2 Qc7 14.h3 e5 15.e4 d4 16.Bb2 (16.0–0=+) 16...Nh5 (16...Ra8!?–/+) 17.Ne5= Ne5 (17...Be5 18.Bh5) 18.Bh5 Qe7 (18...f5 19.f4 Nf7 20.e5+/–) 19.Be2 (19.0–0 Ra8+=) 19...Qg5 20.g4 f5 (20...Qf6 21.Bc1=) 21.Nf3 (21.h4 Qe7 22.gf5 Rf5 23.h5=) 21...Nf3= 22.Bf3 fe4 23.Be4 Be4 24.de4 Qf4 25.Qe2 (25.Bc1 Qf3 26.Rg1 Be5–/+) 25...Be5 26.Rg1 Qh2 27.Qf1 Rf3 28.Bc1 Qh3 29.Qh3= Rh3 30.f4 Bc7 31.Bd2 Kf7 32.Kf2 Ra3 33.Ke2 Ra4 34.Rc1 Ra2 35.Rf1 Ra4 36.e5 Ra3 37.Rf3 Rf3 38.Kf3 g5 39.f5 Be5= 40.Bg5 Kg7? 41.Ke4 Bf6 42.Bf4 Bd8 43.g5+/– Kf7 44.Kd5 Ke7 45.Kc6 Kf7 46.Kd7 Be7 47.Kc7 (47...Bg5 48.Bg5+–) 1–0. Mroz,Antoni – Guziec,Krzysztof, corr 1. AMM Poland, 1992.

10.d3 Nbd7 11.Nbd2 e5 12.Be2 =+.

10.d3 Re8=+ 11.Be2 dc4 (11...e5!?=+) 12.dc4= e5 13.Ne5 Qa5 (13...Be5 14.Qd8) 14.Bc3+= Qc7 15.Nf3 Ne4 16.0–0 Bg4 (16...Be6 17.Bd3 Bg4 18.h3+/–) 17.h3+/– (17…Bf5 18.Bd3+/–) 1–0. Bivens – Helgesen, corr 3GMM–25, 1995.

10.d4 Ne4 11.Nbd2 cd4 12.Bd4 (< 12.Nd4 Bb4 13.N4b3 dc4 14.Bc4 Nd2 15.Nd2 Qa5–/+) 12...Bb4 13.Bd3 Qa5 14.Ke2 Nd2 15.Nd2 dc4 16.Nc4 Qb5 17.Ne5 Qa5 18.Qc2 Nc6 19.Nc6 Qh5 20.f3 bc6 21.Qc6 e5 22.Bb2 (22.Qd5 Bf5 23.Bf5 Qf5–/+) 22...Rd8 23.h4 Bf5 (23...e4 24.Qe4 Ba6+=) 24.e4+/– Bc8 25.Qc7 Re8 26.Qb6 Be7 27.Qb5 f6 28.Rc1 Kh8 29.Qc6 Qf7 30.Qc8 Rc8 31.Rc8 Bf8 32.Bc4 Qe7 33.Bc1 h6 34.Be3 Qa3 35.h5 Kh7 36.Bc1 Qb4 37.Bd2 Qa4 ½–½. marekt – miquelstone, ChessWorld.net, 2003.

10.cd5 ed5 11.Be2 Bf5 12.0–0 Nbd7 13.d3 Qa5 14.Bf6 (14.Nc3 Ra8=+) 14...Nf6–/+ 15.d4 (15.e4!? de4 16.de4 Ne4 17.Qd5=+) 15...c4–+ 16.Nc3?? (better is 16.Nh4 Bd7 17.Qc2–+) 16...Qc3 17.Ne5 (17.Qa1 Qb4–+) 17...Be5 18.de5 Qe5 19.Qa4 Ne4 20.f3 Nc5 21.Qb4 b6 22.e4 de4 23.fe4 Be4 24.Qc4 Rd8 25.Qf7 (25...Kh8 26.Qf8 Rf8 27.Rf8#) 1–0. ida1 – bskar, Live Game Caissa's Web, 2005.

10.Be2 Qa5 11.0–0?? (better is 11.Bf6 gf6 12.cd5 ed5 13.Qc2+=) 11...Qa1–+ 12.Qb3 (12.d4–+) 12...b6 (better is 12...Qa5–+) 13.Na3+/– dc4 14.Bc4 (14.Bc4 Qf1 15.Bf1+/–; 14.Ra1?? cb3 15.Nc4 Bc7–+) 1–0. Janek – ijmagen, internet, 2017.

10.Be2 b6 11.0–0 Bb7 12.Nc3 Qc7 (12...dc4 13.Bc4 Qc7 14.h3=+) 13.g3 (13.cd5 Nd5 14.d4 Nc3 15.Bc3 Bf3 16.Bf3 Bh2 17.Kh1 Bd6=+) 13...Rd8 14.cd5 Nd5 15.d4 (15.Nd5 Bd5 16.Qc2 Qb7=+) 15...cd4 (15...Nc3 16.Bc3 Nd7 17.Qd3=+) 16.Nd5 (16.Qd4 Nf6 17.Qh4 Be7=) 16...Bd5 (< 16...ed5 17.Qd4 f6 18.Bd3+=) 17.Qd4 f5 18.Nd2 Bc5 19.Qc3 Qe7 20.Rd1 Ba8 (20...Qg5 21.Nc4=+) 21.Qb3 (21.Qe5 Bd6 22.Qc3 Bd5=) 21...Kf8 (21...Bb7 22.Be5=) 22.Nc4 Rd1 23.Qd1 Ke8 24.Be5 Qb7 25.f3+/– Nd7 26.Bd6 Qd5+= 27.Bc5 Qc5 28.Qd6 Qd6= 29.Nd6 Ke7 30.Nc4 Bd5 31.Nd2 Kd6 32.Kf2 Kc5 33.e4 Ba2 34.ef5 ef5= 35.f4 Nf6 36.h3 Ne4 37.Kf3?? Nc3 38.Bd3–/+ Bd5 39.Ke3 g6 40.Nf3 Bf3 41.Kf3 Nb5 42.g4 Nd4 43.Ke3 b5 44.gf5 Nf5 45.Ke4 b4 46.Ke5 Ng3 47.Kf6 Nh5 48.Kg5 h6 49.Kg4–/+ Nf6 50.Kh4 Nd5 51.Bg6 Nf4 52.Bb1 Kd4 53.Bh7 b3 54.Kg4 Nd3 55.Kf3 b2 (56.Bd3 Kd3–+) 0–1. Sommer – Kern, Hessen clubgame, 1995.

10.Be2 b6 11.0–0 Bb7 12.d4 Nbd7 13.Nbd2 cd4 14.Bd4 (14.Nd4 Qc7 15.f4 Ra8+=) 14...Qc7 15.h3 (15.Bf6 Nf6 16.cd5 Bd5+=) 15...e5 16.Bb2 e4 17.Nd4= Bh2 (17...Bb4 18.Nc2 Ba5 19.Na3=) 18.Kh1 Be5 19.Qb1 Nc5 (19...Ra8 20.Rc1=) 20.cd5 (20.Rc1 Rd8=) 20...Bd5 (20...Nd5 21.Rc1=) 21.Rd1 (21.Nc4 Bc4 22.Bc4 Na4=) 21...Na4 (21...Rd8 22.Nc6 Bc6 23.Be5 Qe5 24.bc6=) 22.Nc4 (22.Rc1 Qd7=) 22...Nb2 (22...Bc4 23.Rc1=) 23.Qb2 Rc8 (23...Bc4 24.Rc1=) 24.Ne5 Qe5 25.Rc1 Rc5 26.Qa3 Rc1 27.Qc1 Ne8 (27...Qb8 28.Nf5 Kh8 29.Ne7+=) 28.Bg4 (28.Qc8 Kf8+=) 28...Qc7= 29.Nc6 (29.Qc7 Nc7 30.Kh2 Kf8=) 29...h6 30.Be2 Kh8 31.Kg1 f6 32.Qc2 Nd6 33.Qd1 Bf7 34.f3 Be6 35.Kh2?? (35.Kh2 Nb5 36.f4 Qc6 37.Qa4–+; better is 35.fe4 Ne4 36.Qd4=). Ringsborg,Allan (2260) – Simmelsgaard,Jens Jorgen (2120), corr DEN–ch Denmark, 2000.

10.Be2 dc4 11.0–0 =.

10.Be2 Bd7 11.0–0+= b6 (11...dc4 12.Na3+=) 12.Bf6 (12.Qa4 Bc8+=) 12...Qf6 13.Nc3 dc4 14.Qc2 Qe7 15.Bc4 (15.Ra1 Bc8+=) 15...Bc8 16.Ra1 (16.Ne4 Nd7+=) 16...Nd7= 17.Qe4 Nf6 18.Qc6 Qc7 19.d4 cd4 (19...Bb7 20.Qc7 Bc7 21.Ra7+=) 20.Qc7 Bc7 21.Nd4 Ng4 (21...g6 22.Nc6+=) 22.g3 Bb8? (better is 22...Ne5!? 23.Be2 Re8+=) 23.Na4 Bb7 (23...Ne5 24.Nb6 Bb7 25.Bf1+–) 24.Ne6 Re8 25.Nd4 Bc7 26.Nc3 Ra8 27.Ra8 Ba8 28.Bd5 Bd5 29.Nd5 Bd8 30.Kg2 Nf6 (30...Kf8 31.e4 Nf6 32.Nc3+–) 31.Nf6 Bf6 32.Kf3 Kf8 33.Ke4 Ke8 34.Kd5 Kd7? 35.Nc6 Bc3 36.Ne5 Be5 37.Ke5 f6 38.Kd5 f5 39.f3 g6 40.e4 h6 41.e5 g5 42.g4 f4 43.h3 (43.h3 h5 44.gh5 Ke8 45.Kd6 Kf8 46.e6 Kg8 47.e7 Kf7 48.Kd7 g4 49.e8Q Kg7 50.Qg6 Kf8 51.h6 gh3 52.Qg7#; 43.e6 Kd8 44.h3 h5 45.gh5 Ke7 46.Ke5 Kf8 47.Kd6 Ke8 48.e7 g4 49.hg4 Kf7 50.h6 Kg6 51.e8Q Kh6 52.Qh8 Kg5 53.Ke5 Kg6 54.Ke6 Kg5 55.Qf6#) 1–0. wiking – honor_me, internet, 2009.

10.Be2 Qe7 11.0–0 Nbd7 12.d4 cd4 13.Qd4 dc4 (13...e5 14.Qh4=) 14.Rd1+= Bb4 (14...Bb8 15.Qh4+=) 15.Qc4 Nb6 (15...Bd6 16.Qh4+=) 16.Qh4 (16.Bf6 gf6 17.Qd4 Bc5 18.Qg4 Kh8+/–) 16...Nfd5 (16...Nfd7 17.Qe7 Be7 18.e4+=) 17.Qe7 Be7 18.Nc3 Rd8 19.Kf1 (19.Nd5 Nd5 20.e4 Nf6 21.Rd8 Bd8+=) 19...Bf6 (19...Nc7 20.Rd8 Bd8 21.Bb2+=) 20.Nd5 Rd5 21.Bf6 gf6 (21...Rd1 22.Bd1 gf6 23.Nd2+=) 22.Ke1 (22.Rc1 f5+=) 22...Kf8 (22...Rd1 23.Kd1 Nd5 24.Kc2+=) 23.Rc1 Ke8 (23...Ke7 24.e4 Rd7 25.h3+=) 24.Rc7 (24.g4 e5 25.Nd2 Ke7+/–) 24...Rd7 25.Rc5 Rd5 26.Rd5 Nd5 27.Kd2 Kd7 28.Bd3 Kd6 29.Bh7+/– Kc5 30.h4+– Kd6 31.h5 Ke7 32.h6 Kf8 33.Bd3 Bd7 34.g4 Nb4 35.Bc4 Nd5 36.g5 fg5 37.Ng5 Nf6 38.f4 Ng4 39.h7 Kg7 40.Nf7 Kh7 41.Ng5 Kg6 42.Ne6 Kf6 43.Nc5 Bc8 44.Bd5 b6 45.Na4 Bd7 46.Bc4 Ke7 47.Nb6 Be8 48.Nd5 Kd6 49.e4 Kc5 50.Be2 Nh6 51.Nc3 Nf7 52.Bh5 (52...Nd6 53.Be8 Ne8 54.Kd3+–) 1–0. Sopermi (2320) – characato (2220), ajedrez21.com, 2001.

10.Be2 Re8 11.0–0 e5 12.d4 e4 13.Nfd2 Qc7 14.Kh1 cd4 15.Bd4 Be5 (15...Bh2? 16.b6 Qe7 17.Kh2 dc4 18.Nc4+– (worse is 18.Bc4 Ng4 19.Kg3 Qd6 20.f4 ef3 21.Kf3 Nc6 22.Bf7 Kf7–/+)) 16.Be5 Re5 17.Nc3 Nbd7 18.Na4 dc4 19.Bc4 b6 20.h3 1–0. BlackPanther – ETC_Chess, playchess.de, 2004.

10.Be2 Re8 11.Be5 =+.

10.Be2 h6 11.d4 b6 =.

10.Be2 h6 11.Bf6 gf6 12.cd5 ed5 13.0–0 +=.

10.Be2 h6 11.Bf6 Qf6=+ 12.Nc3 d4 (12...Qg6!?=) 13.Ne4+= Qe7 14.ed4 cd4 15.Nd4 e5 16.Nd6 Qd6 17.Nc2 f5 (17...Rd8!?+=) 18.d4+/– e4 (18...ed4 19.Qd4 (< 19.Nd4 Qb4 20.Kf1 Rd8+=) 19...Qd4 20.Nd4+/–) 19.c5 Qg6 20.Rg1 (20.0–0 f4 21.Bc4 Kh7+/–) 20...f4 (20...Rd8 21.Bc4 Be6 22.Be6 Qe6 23.g4+/–) 21.d5 (21.Bc4 Be6 22.d5 Bf7+/–) 21...f3 22.Bf1 Bh3 23.g3 Bf1+= 24.Rf1 Nd7 25.c6 Ne5 26.Qd4 Nd3 27.Kd2 bc6 28.bc6 Qg5 29.Ne3 Ra8? 30.Qe4+– Nc5? 31.Qc4 Rd8 32.Qc5 Rd5 33.Qd5 (33...Kh7 34.Qg5 hg5 35.c7+–) 1–0. Machete (2305) – sindbad (1980), ICC, 2003.

10.Be5 Be5 11.Ne5 Qa5 12.Qb3 (12.Bd3 Qc7 13.Ng4 Ne8=) 12...Nbd7 13.Nd7 Bd7 14.Be2 Ra8 15.0–0 Qa2 16.Qc3 b6 17.Qe5 (17.Re1 Ne4 18.Qc1 Qb3=) 17...dc4+= 18.Bf3 (18.Qd6 Qa5+=) 18...Rf8 (18...Re8 19.Qc7 Qa5 20.Nc3+=) 19.Qd6+= Qa7 (19...Qa5 20.Nc3+=) 20.Nc3 Bc8 (20...Qb8 21.Qb8 Rb8 22.Be2+=) 21.Be2= Ne8 22.Qf4 Bb7 (22...Qd7 23.Qc4 (worse is 23.Bc4 Qd2 24.Na4 Qa5–/+) 23...Bb7 24.Rd1=) 23.Qc4 (23.Bc4 Nf6=) 23...Nf6 (23...Qa8 24.Qg4=) 24.e4 (24.d4!?=) 24...Rd8+= 25.d3 Qa3 26.Rb1 e5 27.f3 (27.Qb3 Qb3 28.Rb3 Ra8+=) 27...Bc8–/+ 28.Qb3 Qa5 (28...Qa7 29.Rf1–/+) 29.Qb2 Bd7 (29...Qa7 30.Qc1–/+) 30.Kf1 (30.f4 ef4 31.e5 Ne8+=) 30...Ra8–/+ 31.Bd1 Be6 32.Ba4 h6 33.Bb3+= Bb3 34.Qb3 Rd8 35.Qc2 Rd4 36.Rb2 Qa1 37.Rb1 Qa7 38.Nd1 Qd7 39.Ke2 Nh5 40.g3 Qh3 41.Ke1+= f5 42.ef5 Qf5 43.Ke2 c4 44.Nb2+= cd3 45.Nd3 e4 46.Qb3 Kh7 47.fe4 Re4–+ 48.Kd2 Qh3 49.Kc3 Qh2 50.Qd5 Ng3 51.Rb2 Qh3 52.Rd2 Qe6 53.Nb4 Qe7 54.Nc6 Qa3 55.Kc2 Re3 56.Qc4 Ne4 (56...Ne4 57.Rd4 Rc3 58.Qc3 Qc3 59.Kd1 Qf3 60.Kc2 Qf2 61.Kc1 Nc3–+) 0–1. Andersson,Lars H – Bernard,Herbert, corr ICCF–Cup8/9 V161, 1990.

10.Be5 Be5 11.Ne5 Nbd7 12.Nd7 Bd7 13.Be2 +=.

10.Be2 Nbd7

11.0–0 Qa5 12.Bc3 Qa2 13.d3 Nb6 (13...e5 14.Nh4=) 14.Nbd2 Bd7 15.Qb3 Qb3 16.Nb3 Ra8 17.Na5 (17.Be5 Be7+=) 17...Ra7 18.h3 Ne8 19.Nh2 (19.Ra1 f6=) 19...Na4 20.Bd2 b6 21.Nc6 Bc6 22.bc6 Nb2 23.Bc3 (23.Rb1 Ra2 24.Nf3 dc4 25.dc4 e5=) 23...Ra2+= 24.Rb1?? (better is 24.Bb2 Rb2 25.Re1=) 24...Na4–+ 25.Be1 (25.Bg7 Kg7 26.Bf3 dc4 27.dc4 Bc7–+) 25...Re2 26.Ra1 (26.cd5 ed5 27.Nf3 Nb2–+) 26...Nb2 27.Bc3 Nd3 28.Ra8 Kf8 29.Nf3 (29.cd5 ed5 30.Bg7 Kg7 31.Re8 Nf2–+) 29...f6 (better is 29...dc4 30.Nd2 Re1 31.Nf1–+) 30.g4 (30.cd5 ed5 31.Ra3 b5–+) 30...Rf2 31.cd5 (31.Ne1 Bh2 32.Kh1 dc4–+) 31...Rf3 32.de6 Re3 0–1. madik – wghornsby, gameknot.com, 2010.

11.0–0 Nb6 12.d3= Bd7 13.Ne5 Qc7 (13...Bc8 14.f4=) 14.f4 (< 14.Nd7 Nbd7 (< 14...Bh2 15.Kh1 Nfd7 16.g3+/–) 15.g3 Ra8=) 14...Rd8 (14...Bc8 15.Nd2+=) 15.Bf3 dc4 16.dc4 Be5 (better is 16...Be8!? 17.Qe2 Nfd7+=) 17.Be5+– Qc8 18.Qc2 Be8 (18...Ne8 19.Nd2+/–) 19.Nd2 Nbd7 20.Bd6 b6 (better is 20...Nb6 21.Be7 Rd2 22.Qd2 Nc4+–) 21.Be7 e5 22.Qd3 Qc7 (22...ef4 23.ef4 h6+–) 23.Bd8 Qd8 24.fe5 (24...h6 25.ef6 Qf6 26.Bd5+–) 1–0. mrkt – guest7858, ICC, 2005.

11.0–0 Nb6 12.d3 Qe7 13.Nbd2 e5 14.d4 (14.cd5 Nfd5 15.Nc4 f6=) 14...ed4 (14...cd4 15.ed4 e4 16.c5 ef3 17.Bf3=) 15.ed4 Be6 (15...Re8 16.Re1=) 16.Re1 Ne4 (16...Re8 17.Qc2=) 17.cd5 Bd5 18.Bd3 (18.Ne4 Be4 19.Qc1 Rd8=) 18...f5 19.Ne4 (better is 19.Qc2 Ra8 20.Bb2=) 19...fe4–/+ (< 19...Be4 20.Qb3 Kh8 21.Nd2+=) 20.Be4? (20.Qd2 cd4 A) 21.Nd4 Bf4 22.Qc3 Bh2 23.Kh2 Qh4 24.Kg1 Qf2 (24...ed3?! 25.Nf3 Qf6 26.Qd3=) 25.Kh2 ed3–+; B) 21.Bd4=+) 20...Be4–+ 21.Nd2?? (better is 21.dc5 Bc5 22.Bd4–+) 21...Bh2 22.Kf1 (22.Kh1 Bg2 (22...Rf2 23.Ne4 Qh4 24.Nf2 Bg3 25.Nh3 Be1 26.dc5+–) 23.Kh2 Qh4 24.Kg2 Rf2 25.Kg1 Qh2) 22…Bd3 (23.Re2 Nd5–+) 0–1. pumpkin (2515) – vladislavk (2005), net–chess.com, 2005.

11.Nc3 Nb6 12.d3= dc4 13.dc4 Qe7 14.Qc2 e5 15.Nd2 (15.0–0 e4 16.Nd2 Qe5+/–) 15...Bg4 (15...Rd8 16.0–0=+) 16.f3 (16.Nd5 Nbd5 17.Bg4 Ne3 (17...Ng4?! 18.cd5 Qh4 19.g3=+) 18.fe3 Ng4–/+) 16...Bh5 (16...Ra8 17.0–0 Be6 18.f4=+) 17.0–0= Bb8 18.Rd1 Ba7 (18...Rd8!?=) 19.e4+= Qd6 20.Nf1 Qc7 21.Ne3 Bg6 22.Ncd5 Nbd5 23.Nd5 Nd5 24.Rd5 f6 25.Qd2 Bf7 (25...Ra8 26.Rd7 Qb6 27.Qd5 Kf8 28.Qb7 (28.Rb7?! Rd8+–) 28...Qb7 29.Rb7+–) 26.Rd7 Qb8 27.Qa5 (better is 27.Bc3+=) 27...Qc8? (better is 27...Be6 28.Re7 Bf7+=) 28.Rf7!+– Rf7 29.Qa7 Rd7 30.Bc3 Rd8 31.Ba5 Qa8 32.Qa8 Ra8 33.Bb6 Rc8 34.Bf1 g5 35.g3 Kf7 36.Bh3 Ra8 37.Bc5 Ra4 38.Bf1 h5 39.Kf2 (39...Ra2 40.Be2+–) 1–0. Kreuzer,Uwe – Mephisto MM4, 1989.

11.Nc3 dc4 12.Bc4 Nb6 13.d3 =+.

11.Nc3 dc4 12.Bc4 Nb6 13.Be2 e5 14.Qc2 (14.d3 Qe7=+) 14...Bg4 (14...Re8 15.0–0=+) 15.0–0 Qd7 16.Rd1 Nbd5 (16...Ra8 17.h3 Bh5 18.Bb2=) 17.Nd5 Nd5 18.Qe4 (18.h3 Nb4 19.Qe4 Bf3 20.Qf3 Re8+=) 18...Nf6=+ 19.Qc4 Qc7 20.h3 Be6 21.Qc2 (21.Qc3 Ra8=) 21...h6 (21...Bd5 22.d4 ed4 23.ed4=+) 22.Rc1 (22.Bc4 Bc4 23.Qc4 Ra8=) 22...Qb8 (22...Ra8 23.Bc4 Bc4 24.Qc4=) 23.d3 (23.Bc4 Bc4 24.Qc4 Re8=) 23...Nd7 24.Nd2 f5 25.Nc4 Be7 26.d4 cd4 27.ed4 ed4 28.Bd4+= Bf6 29.Bf6 Nf6 30.Ne3 Rc8 31.Qb2 Ne4?? 32.Nc2?? (better is 32.Bc4 Rc4 33.Nc4+– (33.Rc4?! Bc4 34.Nc4 Qf4=)) 0–1. Sternik,Ryszard – Grzelak,Romuald, corr Poland, 1967.

11.d3 b6 12.0–0 Bb7 13.Qc2 Qe7 =.

11.d3 b6 12.0–0 Bb7 13.Nbd2 Qc7 (13...Qe7 14.Bb2=+) 14.Qc2 Ra8 15.Rc1 (15.Bb2 e5=) 15...Ne5 (15...e5 16.e4 d4 17.Bb2=+) 16.h3 (16.d4 Nf3 17.Nf3 cd4 18.Bd4 e5 19.Bb6 Qb6=) 16...dc4 (16...Ned7 17.cd5 ed5 18.Bc3=) 17.dc4 h6 (17...Ned7 18.Rd1=) 18.Qb2 (18.Rd1 Rd8=) 18...Nfd7 19.Kf1 (19.Rd1 Nf3 20.Nf3 Nf6=) 19...f6 (19...Rd8 20.Rd1=) 20.Qc2 Nf3 (20...Rd8 21.Rd1=) 21.Nf3 (21.Bf3 Be5 22.Be5 Ne5 23.Bb7 Qb7=) 21...Nf8 (21...Ne5 22.Be5 Be5 23.Rd1=) 22.Bd3 (22.Rd1 Rd8=) 22...Bf3 23.gf3 Be5 (23...f5 24.Rd1=) ½–½. Dzindzichashvili,Roman – Fuchs,Reinhard, Tbilisi, 1965.

11.d3 Qc7 12.Nc3 =+.

11.d3 Qc7 12.h3 e5 13.Nc3 (13.cd5 Nd5 14.0–0 b6=+) 13...d4–/+ 14.Ne4 Ne4 15.de4 de3 (15...Nf6 16.Bd3=+) 16.fe3=+ Nf6 (16...Nb6 17.Qc2=+) 17.Nd2 (17.Qc2 b6=+) 17...Qa5 18.0–0 Qa3 (18...Rd8 19.Qc2=+) 19.Nb3 Ne4 20.Rf3 (20.Bd3 Nf6=+) 20...Be6–/+ 21.Bd3 Nf6 (21...Ng5 22.Rg3 f6–/+) 22.Bc2 (22.Be2 Bc7–/+) 22...Rd8 (22...Bc4 23.Rf6 Bb3 24.Bh7 Kh7 25.Qb1 Kg8 26.Rd6–/+) 23.Qf1 Qa4 24.Rf6=+ Bc4 25.Rd6= Rd6 26.Qf5 Re6 27.Qh7 Kf8 28.Qh8 Ke7 29.Qh4 f6 30.Qg4 Bb3 31.Qa4 Ba4 32.Ba4 Rd6 33.Bb3?? c4 34.Bc4 Rd1–+ 35.Kf2 Ra1 36.Bd5 b6 37.Kg3 Rc1 38.Kg4 Rc5 39.Bc6 Rc6 40.bc6 Kd6 41.c7 Kc7 42.Kf5 b5 43.Kg6 (43.g4 Kd6 44.h4–+) 0–1. De Visser,Arno – Duinmaijer, 1985.

11.d3 e5 12.cd5 Nd5 13.Nbd2 Re8 14.0–0 Kh8 15.Ne4 Bc7 (better is 15...N7f6!?=) 16.Nfd2 ½–½. Lindner,Jan Joost (2075) – Kuettner,Uwe (2345), EU–chT Seniors, 2007.

11.d4 dc4 12.dc5 Bc5 13.Bc4 Qc7 =.

11.0–0 b6

12.Nc3 Bb7 13.d3.

12.Nc3 Bb7 13.d4?! cd4 14.Nd4 (14.ed4 dc4 15.Bc4 Bf3 16.Qf3 Bh2 17.Kh2 Qc7; 14.Qd4) 14...Qc7 15.cd5 Bh2 16.Kh1 Nd5 17.Nd5 Bd5 18.f4 Bg3 19.Nf5 ef5 20.Qd5 Qd8 21.Qf5 Qh4 22.Qh3 Nc5 23.Bd4 Ne4 24.Bb6?! (24.Kg1 Bf2 25.Kh2 Bg3=) 24...Nf2 25.Rf2 Bf2 26.Qh4 Bh4 27.Kh2 Be7 28.Ba7 Re8 29.Bf3 Bd6 30.Bd4 Bb8 31.b6 g6 32.g4 Rd8 33.b7 g5 34.Be5 Be5 35.fe5 Kf8 36.Kg3 Ke7 37.Bd5 f6 38.ef6 Kf6 39.e4 Ke5 40.Kf3 Kd4 41.Ke2 Rf8 42.Be6 Rb8 43.Bd5 ½–½. Junge – Steinmueller, corr 1977.

12.Nc3 Bb7 13.d4 cd4 (13...dc4 14.Bc4 Bf3 15.gf3 cd4 16.Qd4–/+) 14.Nd4 (14.Qd4 e5 15.Qd2 e4=) 14...Qc7+= 15.h3 (15.cd5 Bh2 16.Kh1 Nd5 17.Nd5 Bd5+= (worse is 17...ed5 18.f4+–)) 15...Ne5 (15...dc4!? 16.Qc2 Rd8–/+) 16.cd5= Nd5 17.Nd5 Bd5 (worse is 17...ed5 18.f4 Ng6 19.Nf5+/–) 18.Qb1 Ra8 19.Rc1 Qb7 20.f3 Ra3 (20...Bc5 21.Bb2+=) 21.e4= Ba2 22.Qb2 Ra8 23.Nc6 f6 24.Qc2 Bc5 25.Bd4 Nc6 26.Bc5 bc5 27.bc6 ½–½. CountFromHolland – Hotty_toaster, playchess.de, 2002.

12.d3 Bb7 13.Nbd2 Qc7 14.Qc2 Ra8 15.Bc3 Qb8 16.h3 h6 17.Ra1 e5 (17...Ra1 18.Ba1 e5 19.cd5 Bd5 20.Nc4=) 18.cd5 (18.Ra8 Qa8 19.d4 ed4 20.ed4 Qe8=) 18...Nd5 19.Ra8 Qa8 20.Bb2 Bc7 (20...Nb4 21.Qc4=) 21.Nc4 Nb4 (21...Qe8 22.Nfd2=) 22.Qd1 (22.Qb3 Qe8=) 22...Qe8 23.e4 f6 (23...Qd8 24.Qb3=) 24.Bc3+= Nf8 (24...Na2!? 25.Bd2 Kh7+=) 25.Bb4+/– cb4 26.Qb3 Kh7 (26...Ne6 27.Qb4 Nf4 28.Bf1+=) 27.Qb4 Ne6 28.Ne3 (28.Ncd2 Qd7+=) 28...Nf4 29.Bf1 Qd7 30.Qc4 Bd8 (30...Bb8 31.Kh2+=) 31.d4 (31.Kh2 Be7+=) 31...ed4 32.Nd4 Be4 33.Nc6 f5 34.Nd8 (34.f3 Qd2 35.fe4 Qe3 36.Kh1 Nh5 37.Nd8 Ng3 38.Kh2 Qf4+=) 34...Qd8= 35.Qf7 Qg5 36.Bc4 h5 37.Qg8 Kh6 38.Qh8 Kg6 39.Qe8 Kh6 40.Bf7. pierre – Hitman, internet, 2006.

12.d3 Bb7 13.Nbd2 Qc7 14.Qc2 Ra8 15.Bc3 h6 16.Qb2 (16.Ra1 Ra1 17.Ba1 Ne5=) 16...e5 17.cd5 Nd5 18.Nc4 (18.Ra1 Ra1 19.Qa1 Nc3 20.Qc3 Nf6=) 18...Nc3 19.Qc3 Ra4 (19...Bd5 20.Ra1=) 20.Ra1 Ra1 21.Qa1 e4 22.de4 Be4 23.h3 Be7 24.Ncd2 (24.Nfd2 Bf6 25.Qa4 Bd5=) 24...Bd5 25.e4 (25.Bc4 Qd6=) 25...Bf6 26.Qa3 Bb7 27.Bc4 Ne5 28.Qa7 Nf3 29.Nf3 Bd8 30.Bd5 Bd5 31.Qc7 Bc7 32.ed5 Kf8 (32...c4 33.Kf1 Kf8 34.Nd4=) 33.Nd2+= Ke7 34.Nc4 Kf6 (34...h5 35.g3+=) 35.Kf1 Kf5 36.f3 h5 (36...Kf6 37.Ke2+=) 37.g4 hg4 38.hg4 (38.fg4?! Ke4 39.d6 Bd8+=) 38...Kf6 39.Ke2 Ke7 40.Ke3 Kd7 41.Ke4 Ke7 (41...g6 42.g5+/–) 42.f4 (42.d6 Bd6 43.Nb6 Ke6+/–) 42...Kd7 43.f5 Ke7 44.d6 Bd6 45.Nb6 (45.Nb6 Kf6 46.Nc4+–) 1–0. De Visser,Arnold – Germanov,Aleksandr Mikhailov, corr ICCF EU/M/Gr/558, 1997.

12.d3 Bb7 13.Nbd2 Qc7 14.h3 Ra8 15.Qc2 (15.cd5 ed5 16.Qc2 Qd8=) 15…Ne5. Kasper – Schulze, (year?).

12.d3 Bb7+= 13.Nfd2 Qc7 14.h3 e5 (14...Ra8 15.Nc3+=) 15.cd5= Nd5 16.Nc3 Rd8 (16...Ra8 17.Nc4 Nb4 18.Bg4=) 17.Nd5 (17.Bf3 N7f6=) 17...Bd5 18.Nc4 Be7 (18...Bc4 19.dc4 Nf8 20.Qc2+=) 19.Qc2 (19.Bf3 Be6=) 19...f6 20.Bg4 Nf8 21.Bf5 Be6 (21...Qb7 22.f4 ef4 23.Rf4=) 22.Be4 (22.Be6 Ne6 23.Qb3 Kf7+=) 22...Rc8 (22...Ng6 23.Bb2=) 23.Bb2+= Bd8 (23...Nd7 24.f4+=) 24.Ra1 Ng6 (24...Nd7 25.Ra6+=) 25.Ra6 (25.Nb6 Qb6 26.Ra6 Qb5 27.Re6 Ne7+=) 25...Qd7 (25...Rb8!?+=) 26.Rb6+/– (worse is 26.Nb6 Qb5 27.Qa4 Qa4 28.Na4 Kf7+=) 26...Bb6 27.Nb6 Qb5 28.Nc8 Bc8 29.Bd5 (29.Ba3!?+–) 29...Kh8+= 30.Ba3 Attacks the isolani on c5 30...Ba6 31.Bc4 (31.Be4 c4+/–) 31...Qa5 32.Ba6 Qa3 33.Qc4 h5 (33...Qa1 34.Kh2 h6 35.Qe6+/–) 34.Qe6 Kh7 35.g3 (35.Qf5 Qa6 36.Qh5 Kg8 37.Qg6 c4 38.dc4 Qc4+/–) 35...Qa5 (35...h4 36.g4 e4 37.de4 Qa1 38.Bf1 Qe5+/–) 36.Bb7 Qd8?! (36...Qa1 37.Kg2 Kh6+–) 37.Qf5 Qe8 (37...Kh6 38.Bf3 Nf4 39.gf4+–) 38.Qh5 (38.Qh5 Kg8 39.Be4+–) 1–0. Zenner,Claus – Dieckmann,Egon, corr DDR, 1972.

12.d3 Qc7 13.Nbd2 Bb7 14.Qc2 Ra8 15.Bb2 Be7 16.Rc1 h6 17.d4 Ra2 18.Qb1 Ra7 19.h3 dc4 20.Nc4 Be4 21.Bd3 Bd5 22.Nfd2 Qb8 23.Qc2 Qc7 24.Ne5 Ne5 25.de5 Nd7 26.e4 Ba2 27.Ra1 Qb7 28.g3 Nf8 29.Kg2 Bd8 30.Rd1 Qb8 31.h4 Qa8 32.Be2 Ra4 33.Nc4 Bc4 34.Bc4 Bc7 35.f4 Ra7 36.h5 Ra4 37.Kh3 Kh8 38.Qd3 Kg8 39.Qe2 Ra7 40.Bb3 Ra5 41.Kg2 Ra7 42.Rd2 Qe8 43.Rd1 Ra5 Attacking the isolated pawn on b5 44.Bc4+= Ra7 45.Rd2 Ra4 46.Rd1 Ra8 47.Qc2 Qb8 48.Qe2 Qc8 49.Bd3 Qe8 50.Bc3 1–0. Buczinski,Henryk (2200) – Latib,Yunus (1845), RA–2011–0–00171, 2011.

12.d4 Qc7 13.dc5 Bc5 14.Nbd2 Bb7 15.Qb1 dc4 16.Rc1 Ra8 17.Rc4 Bd5 18.Rc1 Qb7 19.Bd3 Ra4 20.Re1 Qa8 21.h3 h6 22.Bc3 Ra3 23.Bb2 Ra4 24.Bc3 Ra3 25.Bb2 Ra4 26.Bc3 ½–½. Nguyen Hoang Nam1 (2360) – Pham Chuong (2395), Can Tho VIE, Men Ch, 2012.

12.d4 Bb7

13.dc5 Nc5 14.Nc3 (14.Be5 Be5 (14...Nfe4 15.Qd4 f6 16.Bd6 Qd6 17.Nbd2 e5 18.Ne4 Ne4 19.Qb2 Qe6=; 14...Nce4 15.Qd4 Bc5 16.Qb2 Qe7 17.cd5 Bd5 18.Nc3 Nc3 19.Bc3 Ra8=) 15.Ne5 Qc7 16.Qd4 Rd8 17.Rd1 Nfe4 18.Nf3 f6 19.Nbd2 e5+=; 14.Nbd2 Qe7 (14...Ng4 15.h3 Nf6 16.cd5 Bd5 17.Nc4 Bc7 18.Bd4 Qe7 19.Qc2 Rd8=; 14...Nfe4 15.cd5 Nd2 16.Qd2 Bd5 17.Qd4 f6 18.Rd1 Nb3 19.Qh4 Na1=) 15.Ne5 Rd8 16.Bd4 Be5 17.Be5 dc4 18.Qc2 Be4 19.Ne4 Nfe4=) 14...dc4 (14...Qe7 15.cd5 Nd5 16.Qd4 f6 17.Rd1 Rd8 18.Qh4 Ra8 19.Nd5 Bd5=; 14...Qc7 15.cd5 Nd5 16.Qd4 f6 17.Qh4 Ra8 18.Nd5 Bd5 19.Bd4 Nb3+=) 15.Bc4 (15.Nd2 Qc7 16.f4 Rd8 17.Qc2 Be7 18.Nc4 Nfe4 19.Rd1 Rd1=) 15...Ng4 16.g3 Bf3 17.Qf3 Nh2 18.Kh2 Qh4 19.Kg2 Qc4 20.Rh1 Be7 21.Ne2 (21.Qc6 Bf6–+) 21...Rd8 (better is 21...Qb5!? 22.Nd4 Qd7–+) 22.Nd4–/+ Bf8 23.Rh4 Nd3 24.Qe4 g6 25.Rh1 Rd5 0–1. phildo (1875) – mannx (2155), gameknot.com, 2012.

13.Nbd2 cd4 14.Bd4 Qc7 15.h3 (15.cd5 e5 16.Bb2 e4–/+ (16...Nd5?! 17.Ne4=)) 15...e5=+ 16.Bb2 Rc8 17.Qb3 Nc5 18.Qa2 Ra8 19.Qb1 Na4 20.Ba1 e4 (20...Ne4 21.cd5 Nac3 22.Bc3 Nc3 23.Qd3 Bd5 24.e4–/+) 21.Nd4 Bh2 22.Kh1 Be5 23.Rc1 Nc5 24.Bb2 Qd7 25.cd5 (25.Qc2 Ra2=+) 25...Bd5 26.Kg1 Ne6 27.Ne6 Bb2 28.Qb2 Qe6 (< 28...fe6 29.Nc4 Qd8 30.Rd1+=) 29.Bc4 h6 30.Bb3 Bb3 31.Nb3 Qd5 32.Nd4 Ra2 33.Qc3 Qd8 34.Qc6 g6 (34...Rd2 35.Qc3 Rd3 36.Qc7 Qc7 37.Rc7+=) 35.Qc4 Rd2 36.Ra1 Nd5 37.Qc1 Rd3 38.Qc6 Kg7 39.Ra8 Rd1 40.Kh2 Qc7 41.Qc7 Nc7 42.Rc8 Rc1= 43.g4 Rc5 44.Kg3 Kf6 45.Rb8 Nd5 46.Rb7 h5 47.Rd7 hg4= 48.Kg4 Ke5 49.Rf7+/– Rc1 50.Rf8 Nf6 51.Kg3 Rg1 52.Kh2 Ra1 53.Rc8 Ra2 54.Rc6 Nd7 55.Kg3 Ra1 56.Kg2 Ra8 57.Rg6 Kd5 58.h4 Rh8 59.Kg3 Rh7 60.Rg5 Kc4 61.h5 Nc5 62.Kh4 Na4 63.Rf5 Rg7 64.h6 Rg2 65.Rh5 Rh2 66.Kg5 Rf2 67.h7 Rf8 68.h8Q Rh8 69.Rh8 Nc3 70.Rc8 (70...Kd3 71.Rc6+–; 70.Kf4 Kb4+–) 1–0. Mueller,M – Hanreich,W, corr QTV–25 Bruchkoe, 1991.

13.Nbd2 cd4 14.Bd4 e5 15.Bb2 =+.

13.Nbd2 cd4 14.Nd4 Qc7 15.f4 Ra8 =+.

13.Nbd2 cd4 14.Nd4 Qc7 15.h3 e5 16.Nf5 Bb4 17.f4 (17.Qc2 Ra8 18.Rc1 Ra7 19.Qd1=; 17.cd5 Bd5 18.Nf3 Ra8 19.Qb1+=) 17...ef4 (17...Rd8 A) 18.cd5 Nd5 (18...Bd5 19.fe5 Ne5 20.Bd4=) 19.Nc4=; B) 18.fe5 Ne5 19.Nf3=) 18.Rf4= Re8 (18...Ra8 19.Nb3= (19.Bb2=)) 19.cd5 Nd5 20.Rg4 (20.Ng7 Ne3 (20...Re3?! 21.Rg4 Rg3 22.Ne4 Rg4 23.Bg4=) 21.Ne8 Qf4–+) 20...g6 21.Nc4 Bc5 22.Bf3 (22.Bd4 N7f6 23.Bf6 Nf6+=) 22...N7f6 (22...Ne3 23.Nce3 Be3 24.Ne3 Bf3 25.Qd4=) 23.Rg5 (23.Bf6 Nf6 24.Qa1 Re6 25.Bb7 Qb7+=) 23...Ne3–/+ 24.Nfe3 Re3 25.Rc5 Qc5 26.Ne3 Qe3 27.Kh1 (27.Kf1 Bf3 28.gf3 Ne8+=) 27...Bf3 28.gf3 Qe6 29.Kg1 (29.Bf6 Qf6 30.Qd3 g5–/+) 29...Nd5 30.h4 f6 31.Bd4 Kf7 32.Bf2 Qf5 33.Qb3 Kg7 34.Qd1 Nc3 35.Qd6 Qf3 36.Bb6 Kh6 37.Kh2 Nb5 38.Qf8 Kh5 39.Qc5 Kh4 40.Qb5? g5?? 41.Qc5 g4 42.Qd4 Qe2 43.Kg1 Kh3 44.Qe3?? Qe3 45.Be3 g3 46.Bd2 h5 47.Bc3 f5 48.Bf6 f4 49.Be5 Kg4 0–1. Krueger,Jan – Gavrijski,Dimitar (2010), corr ICCF WSTT/3/06/2, 2006.

13.cd5 ed5 14.Qc2 Qc7 Black prepares c4 15.Nbd2 Re8 (15...c4 16.Bc3=) 16.Bd3 (16.dc5 bc5 17.Bd3 Ne4=) 16...c4 17.Rc1 Nf8 18.Bf5 (18.Ne5 Qe7 19.Bf5 Bc8=) 18...g6 (18...Bc8 19.Ne5+=) 19.Bh3= Bc8 (19...Ne6 20.Bc3=) 20.Bc8 Qc8 21.Ne5 Ne6 22.h3 Ng5 (22...Nc7 23.Rb1+=) 23.Bb2 Qb7 24.Ra1 Ra8 25.Ra8 Qa8 26.f3 Ne6 27.e4 (27.Nc6 Nc7 28.e4 Nb5 29.ed5 Qa2–+ (29...Nd5?! 30.Qc4 Nbc7 31.Ne5=)) 27...Qa2+= 28.Qb1 Qa4 (28...Qb1 29.Nb1 Nc7 30.Nc3=) 29.Qa1= Qb5 30.ed5 c3 31.Bc3 Nf4 32.Qa7 (32.Nec4 Bf8=) 32...Qd5+= 33.Qa6 (33.Nb1 b5–/+) 33...Kg7 (33...Bc5 34.dc5 Qc5 35.Kh2 Qc3 36.Nec4–/+) 34.Qa1+= Qb5 35.Nec4 Qg5 36.Qf1 Nh3 (36...Nh3 37.Kh1 Nf2 38.Kg1 Bg3–+) 0–1. Naeter,Burkhard (2095) – Geus,Jan (1820), Swiss–77.2.05, 1999.

13.cd5 Nd5 14.Na3 Qe7 =.

13.Nbd2 Qc7

14.Qb3 cd4 15.ed4 Ra8 16.Bb2 –/+.

14.Qb3 cd4–/+ 15.ed4 dc4 (15...Ra8 16.Rc1–/+) 16.Qc4+= Nd5 (16...Qb8 17.Qd3–/+) 17.Qc7 Bc7 18.Ne5 N7f6 19.Bb2 Ra8 20.Ra1 Ra1 21.Ba1 Nf4 22.Bf1 Ne4 (22...Kf8 23.Bb2=) 23.Ne4= Be4 24.f3 Bb7 (24...Bc2 25.Bc4=) 25.Kf2 (25.Bc3 Nd5 26.Bd2 h6=) 25...f6 (25...h6 26.Nc6=) 26.Nc4 (26.Nc6 Nd5=) 26...Kf7 (26...Nd5 27.h4=) 27.g3 Nd5 28.Ne3 (28.Bb2 g5=) 28...Bd6 (28...Ne3 29.Ke3 Bd5 30.Bd3=) 29.Bd3 (29.Nc4 Bb8=) 29…Ne3 ½–½. Grossmann,Philipp (1930) – Rosin,Ralf (1990), Bayernliga, 2006.

14.Qb3 Ne4 15.g3 (15.dc5 Ndc5 16.Qb2 f6+=) 15...Ndf6 (15...Nd2 16.Nd2 cd4 17.ed4 dc4 18.Nc4+=) 16.Bd3 (16.cd5 ed5 17.dc5 bc5+=) 16...Nd2 (16...cd4 17.ed4 Ra8 18.Qb1+=) 17.Nd2+= ½–½. Schwichtenberg,J – Neudel,B, Dresden, 2001.

14.dc5!? Qc5 15.cd5 Bd5 16.Qb1 =.

14.dc5 Bc5 15.Qb1 Ra8 =.

14.dc5 Bc5 15.Qb1 dc4 =.

14.dc5 Bc5 15.Qb1 Rd8 =.

14.dc5= Nc5 15.h3 (15.Bf6 gf6 16.cd5 Bd5=) 15...Nfe4 16.cd5 Bd5 17.Nd4 (17.Bc4 Qd7+=) 17...Ra8 18.Ne4 (18.Nc4 Ra2 19.Nd6 Qd6–/+) 18...Ne4 19.Bf3 (19.Bd3 Bh2 20.Kh1 Be5+=) 19...Bh2 20.Kh1 Be5 21.Qe2 (21.Be4 Be4 22.f3 Bd5+=) 21...Bc4 (21...Ra2 22.Qa2 Ng3 23.fg3 Ba2 24.Nc6 Bg3 25.Bd4–/+) 22.Ne6 (better is 22.Qd1!? Qb7 23.Qb1 Bf1 24.Be4 Ra1 25.Qa1 (25.Bb7?? Rb1 26.f4 Bb5 27.Kh2 Bd4 28.ed4 Rd1–+) 25...Qe4 26.Qf1 Bd4 27.ed4 Qd4 28.Qc1–/+) 22...Be6–+ (22...Be2?! 23.Nc7 Bc7 24.Be2 Nf2 25.Kg1+=; 22...Ra1?! 23.Ra1 fe6 24.Ra8 Kf7 25.Qc2–/+; 22...fe6?! 23.Be5 Be2 24.Bc7 Bf1 25.Be4+=) 23.Be4 Ra1 24.Ra1 Ba1 (24...Ba1 25.Qd3 g6–+) 0–1. Tkachiev,V – Karpov,A, Alma Ata, 1995.

14.h3 cd4 15.Nd4 Ra8 16.cd5 Bd5 17.Bf3 =+.

14.h3 Ne4 15.Ne4 de4 16.Nd2 f5 17.Nb3 e5 18.d5 Qd8 19.Qe1 Qg5 20.Bd1 Bc8 21.Nd2 Nf6 (21...Qg6 22.Bc3=) 22.f3+= ef3 (22...Qg6 23.fe4 fe4 24.Kh2+=) 23.Nf3 (23.Bf3?! e4 24.Bd1 Nh5=; 23.Rf3?! e4 24.Rf1 Qg6=) 23...Qh6 24.Be5 Be5 25.Ne5 Re8 26.Qg3 Ne4 27.Qf4 g5 28.Qh2 Qf6 29.Ng4 Qc3 (better is 29...Qg7!? 30.Nf2 Nd2+=) 30.Qc7+= Qg7 (30...Kh8 31.Nf2 Nf2 32.Rf2 Qe1 33.Rf1 Qe3 34.Kh1+/–) 31.Qc6+/– Bd7? (31...Rf8 32.Bc2 Nd2 33.Bf5 Nf1 34.Bc8 Nd2 35.Be6 Kh8–/+) 32.Nh6+– Kh8 33.Nf5 Bc6 34.Ng7 Kg7 35.bc6 Nd6 36.Bg4 Re7 37.e4! Re4 38.c7 Re8?! 39.Rb1 h5 40.Be6 Nc8 41.Bc8 Rc8 42.d6 (42.d6 Kf7 43.d7 Rc7 44.d8Q Ra7 45.Rb6 Re7 46.Qd5 Kg7 47.Qg5 Kf8 48.Rb8 Kf7 49.Qg8 Kf6 50.Rf8 Rf7 51.Qf7 Ke5 52.Qd5#) 1–0. Osovsky,Boris (2130) – Salesa Greus,Francisco (2075), Valencia Provincial South, 2004.

14.h3 h6 15.Qc2 cd4 16.Nd4 Ra8 17.Rc1 =.

14.h3 h6 15.Qc2 cd4 16.Nd4 Nc5 17.Rd1 =.

14.h3 h6 15.Qc2 Re8 16.Rc1 (16.cd5 ed5 (worse is 16...Bd5 17.e4+/–) 17.dc5 bc5=) 16...e5 (16...cd4 17.Nd4 Nc5 18.N4b3=) 17.dc5 (17.de5 Ne5 18.cd5 Nd5 19.Ne5 Be5=) 17...Nc5 (17...Qc5 18.Nb3 Qc7 19.Qb2=) 18.cd5 Nd5 White gets strong play along the open d–file (18...Bd5 19.Nc4=) 19.Nc4 Nf6 (19...Nb4!? 20.Qb1 Nd5=) 20.Rd1+/– (worse is 20.Nd6 Qd6 21.Rd1 Qb8=) 20...Nce4 21.Qb2 Nd7 22.Nd6 Nd6 23.Qd2 Re6 (23...Bf3 24.Bf3 (24.gf3?! Re6=; worse is 24.Qd6 Qd6 25.Rd6 Be2 26.Rd7 f6+=) 24...Re6 25.Bg4+–) 24.Ne5!+– Ne5 (24...Re5 25.Be5) 25.Be5 Re5 26.Qd6 Qd6 (26...Re7 27.Qc7 Rc7 28.Rd8 Kh7 29.Bd3 g6 30.Rd6+–) 27.Rd6 Re6 28.Rd8 Kh7 29.Rd7 (29.Rd7 Be4 30.Rf7+–) 1–0. Grund,Karl Heinz – Glaser,Helmut F, corr Germany, 1970.

14.h3 h6 15.cd5 Bd5 16.Nc4 Be7 =.

14.h3 Ra8

15.Bb2 cd4 16.Bd4 e5 17.Bb2 Nc5 18.Qb1 e4 19.Nd4 Bh2.

15.Bb2 cd4 16.Nd4 e5 17.Nf5 +=.

15.Bb2 cd4 16.Nd4 Be5 17.Qc2 Nc5 18.Rc1 Nfe4 19.Ne4 de4.

15.Bb2 e5 16.de5= Ne5 17.cd5 Bd5 18.Qc2 Ra5 (18...Qe7 19.Be5 Be5 20.Bc4 Bc4 A) 21.Ne5? Bf1 (worse is 21...Qe5 22.Nc4 Qe6 23.Rd1=) 22.Nc6 Qe6 23.Nf1 Ne4–+; B) 21.Nc4=) 19.Ra1 (19.Be5 Be5 20.Bc4 Bf3 21.Nf3 Ra8+=) 19...Ra1= 20.Ba1 Qe7 21.Bb2 h6 22.Qb1 Nf3 23.Bf3 Bf3 24.Nf3 Qe4 25.Qa1 Be7 (25...Ne8!?+=) 26.Be5= Qd5 27.Qb2 Bd6 28.Bd6 Qd6 29.Qe5 Qe5 30.Ne5 Kf8 31.Kf1 Ke7 32.Ke2 Nd7 33.Nc4 Ke6 34.Kd2 Kd5 35.Kc3 f5 36.f3 g5 37.g4 f4 38.ef4 gf4 39.h4 Ke6 40.h5 Ne5?? (better is 40...Kf6+/–) 41.Ne5+– Ke5 42.Kd3 Kd5 (42...Kf6 43.Ke4 Ke7 44.Kf4+–) 43.g5! Ke6 (43...hg5 44.h6 Passed pawn) 44.g6 Kf6 45.Ke4 Kg7 46.Kf4 Kf6 47.Ke4 Kg7 48.f4 Kf6 49.f5 Kg7 50.Ke5 Kh8 (50...Kf8 51.f6 Ke8 52.Ke6 Kd8 53.f7 Kc7 54.g7 c4 55.f8Q c3 56.Qe7 Kc8 57.g8Q) 51.f6 1–0. Osmak,Yulia – Konopatskaya,Alexandra, UKR–ch U12 Girls, 2009.

15.Bb2 h6 16.Qb3 (16.cd5 Bd5 17.Qc2 cd4 18.Qc7 Bc7 19.Bd4 e5; 16.dc5 Nc5 17.Bf6 gf6 18.cd5 Bd5 19.Nc4 Be7) 16...e5 (16...cd4 17.ed4 Ne4 (17...Bf4 18.Rc1 Qd6 19.Bc3 Qb8) 18.Rc1+= dc4 19.Rc4 Qb8) 17.de5= Ne5 18.Ne5 (18.Rd1 Qe7 19.Qc3 Nc4) 18...Be5 19.cd5 (19.Bf3 Ra7) 19...Bd5 20.Bc4 Bb2 21.Qb2 Qd7 22.Rc1 Ra5 23.Ra1 (23.Qc2!?+=) 23...Ra1–/+ 24.Qa1 Bc4 25.Qa8 Kh7 26.Nc4 Qb5 27.Nd6 Qd7 (27...Qa5 28.Qf3 Qa1 29.Kh2 Qe5 30.Qf4–+) 28.Qf8 Qe6 29.Qd8 Nd7 30.Qc7 f5 31.h4 Nf6–+ 32.h5 Ne4 33.Nc8–/+ b5 34.Qd8? Nf6–+ 35.Nd6? b4 36.g4 fg4 37.Qc7 Qe5 38.Qb6 g3 39.Qa6 gf2 40.Kf2 Qd6! (40...Qd6 41.Qd6 Ne4 42.Ke2 Nd6–+) 0–1. Ramos Moreno,FJ (2105) – Terron Elena,FM (2275), Malaga ESP, Regional Ch, 2013.

15.Qc2 A) 15...e5 16.de5 (16.Ne5 Ne5 17.de5 Be5 18.Be5 Qe5 19.Bf3 Ra1) 16...Ne5 17.Rd1 h6 18.cd5 Bd5 19.Be5 Be5; B) 15...h6 16.cd5 (16.dc5 Nc5 17.Bf6 gf6 18.cd5 Bd5 19.Nc4 Be7) 16...ed5 17.dc5 bc5 18.Rb1 Qb6 19.Bc3 Bc7; C) 15...cd4 16.Bd4 (16.Nd4 e5 17.N4f3 h6 18.Rd1 e4 19.Nd4 Ra7) 16...e5 17.Bb2 e4 18.Nd4 Bh2 19.Kh1 Be5.

15.dc5 A) 15...Qc5 16.cd5 (16.Qc2 e5 17.Rc1 Rc8 18.Bb2 h6 19.Qd1 Qb4) 16...Bd5 17.Qb1 Qb4 18.Qb4 Bb4 19.Rb1 Bd6; B) 15...Bc5 16.Qb1 (16.Qc2 Ba3 17.Bb2 Bb2 18.Qb2 Nc5 19.Rc1 dc4) 16...h6 17.Rc1 Ba3 18.Rc2 dc4 19.Nc4 Bc5; C) 15...Nc5 16.cd5 (16.Bf6 gf6 17.cd5 Bd5 18.Nc4 Be7 19.Qc2 f5) 16...Nd5 17.Nc4 Be7 18.Qb1 Bf6 19.Bf6 Nf6.

15.cd5 A) 15...ed5 16.dc5 (16.Qc2 c4 17.Bc3 Ra3 18.Ra1 Ra1 19.Ba1 Bb4) 16...bc5 17.Qc2 g6 18.Bc3 c4 19.Rd1 Be7; B) 15...Bd5 16.Qb1 (16.Nc4 Ne4 17.Qc2 f6 18.Bd3 f5 19.Rc1 Bf8) 16...cd4 17.Rc1 Ba2 18.Qb2 Qd8 19.Qd4 Bd5.

11.0–0 dc4

12.Na3= Nb6 13.Nc4 Nc4 14.Bc4 b6 15.Ne5 (15.d4 Bb7=) 15...Bb7 16.f4 Qc7 (16...Be7 17.d3=) 17.Ng4 Be7 (17...Ne8 18.Qc2=) 18.Nf6 (18.f5 Ne8+/–) 18...Bf6+= 19.Bf6 gf6 20.f5 (20.Qg4 Kh8 21.Qh4 f5+=) 20...e5 21.Qg4 Kh8 22.e4 (22.Qh4 Qd6+=) 22...Qd7 (22...Qd6!? 23.d3 Ra8+=) 23.d3+= Qd4 24.Kh1 Qe3 25.Qh5 Kg7 26.h4 Qh6 27.Qh6 Kh6 28.Ra1 Rd8 29.Ra7 Rd7 30.Kg1 (30.Bd5 Bc6 31.Rd7 Bd7+=) 30...Kg7 (30...Kh5 31.g3+/–) 31.Kf2 Kf8 (31...Bc8 32.Rd7 Bd7 33.Ke3+=) 32.Ke3 (32.g4 Ke7+/–) 32...Kg7 (32...Ke7 33.g3+=) 33.Kd2 (33.Bd5 Bc6 34.Rd7 Bd7+/–) 33...Bc6 34.Rd7 (< 34.bc6 Ra7 35.Bb5 Kf8–+) 34...Bd7 35.Kc3 (35.Ke3 Kf8+=) 35...Kf8 (35...Kh6 36.g4+=) 36.Kb3 Ke7 37.Ka4 (37.g4 Kd6+/–) 37...Be8 38.Bd5 Kd6 39.Bb7 Kc7 40.Bd5 Kd6= ½–½. Sokolski – Schagalowitsch, Minsk, 1959.

12.Bc4 e5 13.d3 Nb6 (better is 13...Qe7!?=+) 14.Be5+= ½–½. Nemeth,Laszlo – Szoboszlai,Zita, Cseppko op–A, 2002.

12.Bc4 Nb6

13.d3 Qe7 =.

13.Be2 Nfd5 14.Nc3 =+.

13.Be2 Bd7 14.Qb3 Nfd5 15.Ne5 Qc7 16.f4 Ra8 17.Na3 Be8 18.Nac4 Be7 19.Nb6 Qb6 20.f5 Bf6 21.Bb2 Nc7 22.fe6 Ne6 (22...fe6 23.Bc4=) 23.Bc4 Qd6 24.Nf3 Bb2 25.Qb2 Ra4 26.Rc1 Rb4 27.Qc2 (27.Qe5 Qe5 28.Ne5 b6+=) 27...Bb5= 28.Be6 Qe6 29.Qc5 Rc4 30.Rc4 Qc4 (30...Bc4?? 31.Nd4 Qg4 32.Qc4 Qd1 33.Kf2 Qd2 34.Kf3+–) 31.Qc4 Bc4 32.Ne5 Ba6 33.Kf2 f6 34.Nd7 Bb5 35.Nb6 Kf7 36.e4 Bc6 37.Ke3 f5 38.d3 g5 39.g3 fe4 40.de4 Ke6 41.Kd4 g4 42.Nc4 h5 43.Nb6 Kd6 44.Nc4 Kc7 45.e5 Kd7 46.Nb2 Bb5 47.Kc5 Be2 48.Na4 Bf3 49.Nb2 ½–½. Grund,Karl – Janecky, corr ICCF T–626–19–S, 1975.

13.Be2 Bd7 14.Qc2 Nfd5 15.Rc1 Qc7 16.Nc3 c4 (16...Nb4 17.Qe4=) 17.Ne4 Rc8 (17...Bb5? 18.Nd6 Qd6 19.Qb2+–) 18.Nd6 Qd6 19.Ng5 (19.Be5 Qb4+=) 19...f5= 20.Bf3 (better is 20.Qb2!? Qe7 21.f4=) 20...Qe7–/+ (20...Bb5?! 21.Qb2 Qd7 22.Ne6+=) 21.Bd5 (21.Nh3 Bb5 22.Qb1 Qd7=+) 21...Nd5 (21...ed5?! 22.Nf3=) 22.Nf3 Bb5 23.Qb2 Be8 24.Qd4 b5 25.d3 (25.Ne5 Qa3 26.Bb2 Qc5–/+) 25...c3 26.Qe5 (26.e4 Qa3 27.Re1 fe4 28.de4 Nf4–/+) 26...b4 27.e4 fe4 28.de4 Nf6 29.Nd4 Rc5 (30.Qe6 Qe6 31.Ne6 Re5–+) 0–1. Scherbeijn,C – van der Kemp,M, corr NED, 1995.

13.Be2 Bd7 14.Qc2 Qe7 15.Be5 =.

13.Be2 Bd7 14.Be5 Be5 15.Ne5 Qc7 =.

11.0–0 Qc7

12.Qc2 b6 13.Nc3 Bb7 =.

12.Qc2 b6 13.d3 Bb7 14.Nbd2 =+.

12.Qc2 b6 13.d3 dc4 14.dc4 Bb7 15.h3 Ra8 16.Nc3 Ra5 17.Bb2 Ba8 18.Rd1 Ne5 19.Nd2 Qb7 20.e4 Bc7 21.f4 Ng6 22.g3 h5 23.Bf3 Qb8 24.e5 Nh7? (better is 24...Bf3!? 25.Nf3 Nh7+=) 25.Bh5+– Be5 26.Bf3?? (better is 26.Bg6 Bd4 27.Kh2 fg6 28.Nb3+/–) 26...Bd4= 27.Kg2 Nf6 28.Ne2 e5 29.fe5 Qe5 30.Nd4 cd4 31.Nb3 Nh5 32.Qf2 The pressure on the isolated pawn grows 32...Ra2 (32...Bf3 33.Kf3 (worse is 33.Qf3 Ra2 34.Rd2 Nhf4 35.Kf2 Nh3 36.Kf1 Ng5–/+) 33...Ra2 34.Rd2+=) 33.Rd2 (33.Ba8 Qe3 34.Rd2 Qb3+/–) 33...Qg5 (33...Bf3 34.Qf3 Nhf4 35.Kh2 Qe3–+) 34.Ba8+/– (34.Bd4?? Nh4 35.Kf1 Ng3 36.Ke1 Rd2 37.Nd2 Bf3 38.Qf3 Nf3 39.Nf3 Qf4–+) 34...Ra8 35.Bd4 (better is 35.Rd4!? Ra2 36.Rg4+/–) 35...Ra3= 36.Be3 Qe5 37.Rd5 Qe4 38.Qf3 Ra2 (better is 38...Ng3 39.Kg3 Qh4 40.Kg2 Rb3=) 39.Nd2+– (39.Nd2 Nf6 40.Qe4 Ne4 41.Kf3 Nd2 42.Bd2+– (42.Rd2 Ne5 43.Ke4 Rd2 44.Bd2 Nc4+–)) 1–0. Melich,Jindrich (2150) – Chrz,Pavel (2155), CZE–chT2b, 2001.

12.Qc2 e5 13.d3 =+.

12.Nc3 Nb6 13.Na4 Nfd7 =.

12.Nc3 Nb6 13.d3 d4 14.ed4 cd4 15.Na4 Na4 16.Qa4 =+.

12.Nc3 Nb6 13.d3 e5 14.e4 (14.cd5 Nfd5 15.Ne4 f6=) 14...d4=+ 15.Nd5 (15.Na4 Na4 16.Qa4 Nh5=+) 15...Nfd5 (15...Nbd5 16.ed5 Bf5 17.Re1=+) 16.ed5 f5 17.h3 (17.Qc2 Re8 18.Re1 Re7=) 17...Qe7 (17...e4 18.Nd2 Qe7 19.Qc2–/+) 18.Re1=+ Re8 (18...Bd7 19.Bf1 Qf6 20.Bb2=+) 19.Bb2 (19.Nd2 Qh4=+) 19...Bc7 (19...e4 20.de4 fe4 21.Bd3=+) 20.Bc1 (20.Nd2 Qd6=+) 20...Qd6 (21.Nd2 e4=+). Karker,Norbert – Weiss,Wilhelm, Dyckhoff mem–B corr5456, 1954.

12.Nc3 dc4 13.Bc4 Nb6 14.Be2 Nbd5 15.d4 b6 16.Nd5 Nd5 17.dc5 bc5 18.Qb1 Bb7 19.e4 Nf4 20.Bc4 Qe7 21.Qb2 f5 22.e5 Bc7 23.Qb3 Rd8 24.Rd1 Rd1 25.Qd1 Qd8 26.Qd8 Bd8 27.Ne1 Bd5 28.Bf1 Ba5 29.Nc2 Ng6 30.g3 f4 31.Bd3 fg3 32.hg3 ½–½. Fernandez Fornes – Enricci, CADAP M–ct E–88, 1988.

12.d3 e5 13.Nc3? d4 14.Ne4 Ne4 15.de4 de3. de Visser – Duijnmaijer, 1985.

12.d4 dc4 13.Bc4 cd4 14.Qd4 e5 15.Qh4 e4 16.Nfd2 Ne5 17.Be5 Be5 18.f4 Bd6 19.f5 Qb6 20.Qh3 Bc5 21.Re1 g6 22.g4 Rd8 23.Nb3 Ng4 24.Bf7 Kf7 25.Qh7 Kf8 26.Nc5 Bf5 (26...Qc5?? 27.fg6 Be6 28.g7 Ke8 29.g8Q Bg8 30.Qg8 Ke7 31.Qg7 Ke6 32.Qg4 (32.Qb7?! Qe5 33.Qa6 Ke7 34.Qa7 Rd7+=) 32...Qf5 33.Qf5 Kf5 34.Rf1 Ke5 35.Rc1+–; 26...gf5?! 27.Qh8 Kf7 28.Qh7 Ke8 29.Qg8 Ke7 30.Qg7 Ke8 31.Qg8 Ke7 32.Qg7 Ke8 33.Qg8=) 27.Qh8 (worse is 27.Nb7 Rc8 28.Nc3 Nf6–+ (28...Rc3?! 29.Qh8 Kf7 30.Nd8 Ke7 31.Qc3 Qd8 32.Ra1=)) 27...Kf7 28.Qc3?? (better is 28.Qh7 Kf6 29.Ne4 (29.Nb7? Rb8–+) 29...Be4 30.Qh4 g5 31.Qg4 Bb1 32.Rb1 Qe3 33.Kh1+=) 28...Qc7–+ (28...Qb5?! 29.Na3 Qc6 30.h3–/+) 29.Qc2 Rd5 30.h3 (30.Qa2 Qc5 31.Nc3 Ne3 32.Nd5 Nd5 33.Qf2–+) 30...Rc5 (30...Qg3 31.Kh1 Qe1 32.Kg2 Ne3 33.Kh2 Nc2 34.Nd3 Rd3 35.h4 Qe2 36.Kg1 Rd1) 31.Qa2–+ Be6 (better is 31...Ke7 32.Qg2 Rc1 33.Rc1 Qc1 34.Qf1 Qe3 35.Kg2–+) 32.Rf1 (32.Qg2 Rc2 33.Nd2–+) 32...Ke7 33.Qa8 Qh2 0–1. Mallmann,Bernd (1970) – Sidon,Mike (1815), SVR–ch MAT, 2008.

12.d4 dc4 13.Bc4 Ng4 =.

12.d4 cd4 13.Qd4 e5 =.

12.d4 Rd8 =.

12.h3 b6 13.d4 Bb7 14.Nbd2 Ne4 15.Qc2 cd4 16.Ne4 de4 17.Nd4 Ra8 18.Qc3 Bf8 19.Rd1 Nc5 20.Nc2 f6 21.Bg4 Bd6 22.Nd4 Qe7 (22...Bc8 23.Qd2+=) 23.Qc2 Bc7 24.Bc3 Qf7 25.Bb4 f5 26.Be2 Rd8 27.Nb3 Rd1 28.Qd1 (worse is 28.Bd1 Nd3 29.Ba3 f4 30.ef4 Qf4+=) 28...Nb3 29.Qb3 Qd7 30.Qd1 Qd1 31.Bd1 Kf7 32.Kf1 Ke8 33.Ke2 Kd7 34.Kd2 Bd6 35.Kc3 Bc5 36.Bc5 bc5 37.f3 g5 38.fe4 Be4 39.Bf3 Bf3 40.gf3 e5 41.Kd2 h5 42.Kd3 h4 43.Ke2 Kd6 44.f4 gf4 (44...ef4 45.ef4 gf4 46.Kf3+–) 45.ef4 e4 (45...ef4?? 46.Kf3 Ke5 47.b6+–) 46.Ke3 ½–½. Krannich,Sven (1875) – Reichenbach,Werner (2305), Berlin Lichtenberger op 7th, 2008.

12.h3 dc4=+ 13.Na3 =+.

12.h3 dc4=+ 13.Bc4 Nb6!? 14.Bf6 Nc4 =+.

12.h3 dc4=+ 13.Bc4 Ne5 14.Ne5+= Be5 15.Nc3 (15.b6 Qb8 16.d4 cd4+=) 15...Rd8 (15...Bh2 16.Kh1 Bd6 17.d3=) 16.Qe2 (16.f4 Bd6=) 16...Nd5 (16...b6 17.f4 Bd6 18.Na4=) 17.f4 Nc3 18.Bc3 Bc3 19.dc3 Qd6 (19...b6 20.e4=) 20.Bb3 (20.e4 b6=) 20...b6 21.e4 g6 22.Rd1+= Qc7 23.Rd8 Qd8 24.g4 Kg7 25.Kg2 Bb7 26.Kg3 Qd6 27.Qe3 h6 28.e5 Qd7 29.c4 Ba8 30.Bc2 Qb7 31.Qf2 Qe7 32.h4 Bb7 (32...Qa7 33.Qe2=) ½–½. Hasari,Seppo – Ahtiainen,Esko, corr FIN–ch H qual, 1972.

12.d3 b6

13.Qc2 Bb7 14.Nbd2 h6 15.g3 (15.cd5 ed5 16.Rc1 Ra8=) 15...Re8 16.Bb2 e5 17.Re1 (17.e4 d4=) 17...d4 18.Qd1 (18.Ra1 Ra8=+) 18...e4 19.de4 (better is 19.Ne4 Ne4 20.de4 de3 21.fe3 Re4 22.Kf2=+) 19...de3–+ 20.fe3 Ne4 21.Ne4 Be4 22.Bd3 (22.Rf1 Ne5=+) 22...Bg3 (better is 22...Bd3!? 23.Qd3 Bg3–/+) 23.Be4= Be1 24.Qe1?? (better is 24.Bc6 Bb4 25.Qd7 Qd7 26.Bd7 Re3 27.Kf2=) 24...Re4–+ 25.Nd2 Re6 26.Qf2 Qd8 27.Nf1 (27.e4 Ne5 28.Be5 Re5–+) 27...Qg5 28.Kh1 Re4 29.Ng3 (29.Nd2 Re3 30.Nf1 Re6–+) 29...Rc4 (29...Re3?! 30.Bc1 Rf3 31.Qf3 Qc1 32.Qf1–+) 30.Nf5 (30.Qd2 Rh4 31.Kg2 Nf8–+) 30...Rb4 31.Ng3 Qd5 32.Kg1 Ne5 (33.Be5 Qe5–+) 0–1. Hasler,Ulrich – Vahvaselka,J, corr ICCF TT–4–90, 1992.

13.Nbd2 Bb7

14.Qc2 Ra8 15.Rc1 e5 16.cd5 Nd5 17.Nc4 Qb8 18.Ng5 h6 19.Ne4 Bc7 20.Bf3 Nb4 21.Qb3 Bd5 22.Ned2 Qe8 23.Bd5 Nd5 24.Nf3 e4 25.de4 Qe4 26.Bb2 Qe6 27.Rd1 N5f6 28.Nfd2 Ng4 29.f4 Nf8 30.Rf1 Nf6 31.Qd1 Ne8 32.e4 Qd7 33.Qb3 Ne6 34.e5 Nd4 35.Bd4 Qd4 36.Kh1 g6 37.Qf3 Ra1 38.g3 Rf1 39.Qf1 Ng7 40.Nf3 Qd5 41.Ncd2 Nf5 42.Qc4 Qc4 43.Nc4 Kg7 44.Kg2 f6 45.Kf2 Kf7 46.ef6 Kf6 47.Ke2 g5 48.g4 Ne7 49.fg5 hg5 50.Ncd2 Kg6 51.Ne4 Bf4 52.h4 gh4 53.Nh4 Kf7 54.Kd3 Ke6 55.Kc4 Be3 ½–½. marekt – miquelstone, ChessWorld.net, 2005.

14.Qc2 Ra8 15.Bc3 Qb8 16.h3 (16.Ra1 Ra1 17.Ba1 e5=) 16...Ra7 (16...e5 17.e4 d4 18.Ba1=+) 17.Ra1 Ra1 18.Ba1 e5 19.Bb2 e4 20.de4 de4 21.Nh4 g6 (21...Bh2 22.Kh1=) 22.g3 (22.Bc3 Bh2 23.Kh1 Be5=) 22...Be5 23.Ng2 Qd6 24.Nf4 Bb2 25.Qb2 Ne5 26.Qc2 g5 27.Nh5 (27.Ng2 Qe6 28.Qc3 g4=) 27...Nh5=+ 28.Bh5 f5 (28...Nd3 29.Be2=) 29.Qa2 (29.Be2 Nd3=) 29...f4 (29...Nd3 30.Be2=+) 30.ef4 gf4 31.gf4 Nd3 32.Qa7 Qf4 33.Nf3 ef3 (33...Bc8 34.Qa8 Kg7 35.Qc8 Qc1 36.Kh2 Qf4 37.Kh1+=) 34.Qb7=+ ½–½. Trokenheim,Marek – Goins, e–mail, 1996.

14.Qc2 Ra8 15.Bc3 e5 16.e4 d4 17.Ba1 =+.

14.Qc2 Ra8 15.e4 de4 16.Ne4 Ne4 (16...Ng4 17.g3+= (17.Nd6 Qd6 18.Qb2 f6 19.Rd1 Ra7 20.h3 Bf3 21.hg4 Be2 22.Qe2 e5 23.Qf3+=) 17...e5 18.Nfg5 Ngf6 19.Bf3 Ne4 20.Be4 Be7 21.f4 Bg5 22.fg5 Be4 23.de4+=; 16...Bf4 17.Rd1 (17.Bc3 Ra7 18.Ra1 Ra1 19.Ba1 Ng4 20.g3 Bd6 21.Nfd2 f5 22.Nd6 Qd6 23.f4=) 17...Ra7 18.g3 Bd6 19.Bf6 Nf6 20.Nf6 gf6 21.d4 cd4 22.Nd4 Bb4 23.Bf3=) 17.de4= Ne5 18.Nd2 (18.Be5 Be5 19.Ne5 Qe5 20.Bd3 Ra1 21.Ra1 Qa1 22.Qb1 Qb1 23.Bb1=) 18...Ng6 19.g3 Be5 (19...e5 20.Bc3 Qe7 21.Rd1 Qf6 22.Qd3 Qe6 23.Nf1=) 20.Be5 Qe5 21.Bd3 (21.Rd1 Ra1 22.Ra1 Qa1 23.Kg2=) 21...Qh5 (21...Rd8 22.Be2 Rd4 23.Bf3+=) 22.Re1 (22.f4 e5 23.f5=) 22...Ne5 (22...Rd8 23.Be2+=) 23.Be2 Qg6 (23...Ng4 24.Nf1 Qg6 25.Qd2=) 24.f4 Ng4 (24...Nd7 25.Qd3 Rd8 26.Qd6+=) 25.Bg4 (25.Qd3!? Nf6 26.Bf3+/–) 25...Qg4= 26.Qd3 h5 27.Nf3 f6 28.Kf2 Qh3 29.Rd1 Ra2 30.Ke3 h4 (better is 30...Kh7=) 31.gh4 f5= 32.Qf1?? Ra3–+ 33.Ke2 Qg4 34.Rd8 Kh7 35.Qh3 Qh3 ½–½. Orsicz – Radecki, corr, 1972. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.e3 Bd6 9.c4 0–0 10.Be2 Nbd7 11.0–0 Qc7 12.d3 b6 13.Nbd2 Bb7)

14.cd5 Bd5 15.e4 Bb7 =+.

11.0–0 e5

12.d3 =+.

12.d4 cd4 13.ed4 e4 14.Nfd2 dc4 15.Nc3 Re8 16.Nc4 Bb8 17.Re1 Nb6 18.Ne5 h6 (18...Be5 19.de5 Qd1 20.Rd1 (20.Nd1?! Nfd5+=) 20...Re5 21.Na4 Na4 22.Be5+–) 19.Bf1 Bf5 (worse is 19...Be5 20.de5 Qd1 21.Nd1+/–) 20.Qc1 Qe7 (worse is 20...Qd4 21.Ne4 Qe4 22.Re4 Ne4 23.Nf3+/–; 20...Be5?! 21.de5 Re5 22.Na4+=) 21.f3 ef3 22.Nf3 Qd7 23.Bb2 Rc8 24.Qe3 Ng4 25.Qd2 Qc7 26.h3 Nh2 27.Ne5 Nf1 28.Rf1 Nc4 29.Qf2 (29.b6!? Qe5 30.de5 Nd2 31.Rf5–/+) 29...Be6–/+ 30.Ne4 Qe7 31.Ba1 Ne5 32.de5 Rc4 33.Qe3 Ba7 (33...Qb4!? 34.Nd6 Bd6 35.ed6 Qd6–/+) 34.Qa7= Re4 35.Kh2 Qd7 36.Qc5 Re2 37.Rf3 Qd1 38.Bc3 Rc2 39.Rf2 Rc1 40.Qd4 Qh1 41.Kg3 Rg1 42.Qh4 Rd1 43.Bd2 Qg1 44.Qe4 h5 45.Qd3 Rb1 46.Bc3 Rb3 47.h4 b6 48.Qd8 Kh7 49.Qd3 g6 50.Rb2 Ra3 51.Rf2 Ra4 52.Bd4 Qh1 53.Qe4 (53.Bb6?? Qh4 54.Kf3 Bg4 55.Ke3 Qg5 56.Rf4 Qf4) 53...Kg8 54.Rf4 Ra2 ½–½. Boehnke,Hartmut (2135) – Rosenhek,Marvin (2130), corr WS/M/078 ICCF, 2006.

12.d4 cd4 13.ed4 e4 14.Nfd2 Qc7 15.g3 (15.h3 A) 15...dc4 16.Nc4 (16.Nc3 Nb6 17.Nde4 Ne4 18.Ne4 Bh2 19.Kh1 Re8 20.Bf3 Bf4 21.Re1=; 16.Bc4 Nb6 17.Qe2 Bf5 18.Bb3 Rd8 19.Bb2 Bh2 20.Kh1 Bf4 21.Rc1+=) 16...Bh2 17.Kh1 Bf4 18.Qb3 Rd8 19.b6 Qc6 20.Nc3 Qe6 21.Qb5=; B) 15...Re8 16.c5 (16.Re1 dc4 17.Nc4 Bh2 18.Kh1 Bf4 19.Nc3 Nb6 20.Nb6 Qb6 21.Bb2+=; 16.Qb3 Bf4 17.c5 e3 18.b6 Qb8 19.Nf3 ef2 20.Rf2 Ne4 21.Nc3–+) 16...Bf4 17.Bc3 b6 18.c6 Nf8 19.Re1 e3 20.fe3 Be3 21.Kh1=) 15...e3 (15...dc4 A) 16.Nc4 Nd5 (16...Re8 17.Nd6 Qd6 18.Qc2+= Nb6 19.Qc5 Qd8 20.Qg5 Be6 21.Rc1+=) 17.Nc3 N7f6 18.Nd5 Nd5 19.Qb1 Re8 20.Ne3 Ne3 21.Rc1+=; B) 16.Qc1 Rd8 17.Qc4 Qa5 18.Bc3 Qa8 19.d5 Nb6 20.Qd4 Nbd5 21.Ne4+=; C) 16.Nc3 Nb6 17.Nde4 Ne4 18.Ne4 Bd7 19.Qb1 Ra8 20.Bc3 Be7 21.Rc1+=; 15...b6 16.cd5 (16.Nc3 Re8 17.cd5 Bb4 18.Bc4 Nf8 19.Qe2 Bf5 20.Rc1 Qd6 21.Qe3=; 16.Qb3 dc4 17.Bc4 Bb7 18.f3 ef3 19.Nf3 Bg3 20.hg3 Qg3 21.Kh1 Ne5+=) 16...Re8 17.Nc3 Qd8 18.Re1 Bb4 19.Bc4 Bc3 20.Bc3 Nf8 21.Qc2+=) 16.fe3= (16.c5 Bc5 17.fe3 Bb6 18.Bd3 Re8 19.Qf3 Nf8 20.Nc3 Ba5 21.Rc1+=) 16...Bg3 17.hg3 Qg3 18.Kh1 Ne5 (18...Qh3 19.Kg1 Qg3 20.Kh1 Qh3 21.Kg1 Qg3=) 19.de5 (19.Bf3 Qh4 20.Kg1 Bh3 21.Rf2–/+) 19...Qh4 (19...Qh3 20.Kg1 Qg3 21.Kh1 Qh3=) 20.Kg1 Qg5 (20...Bh3 21.Rf2+/–) 21.Kh1 (21.Kf2=) 21...Qh4 22.Kg1 Bh3 (better is 22...Qg3!? 23.Kh1 Qh4=) 23.Rf2+/– Qg3 24.Kh1 Qf2 25.Qg1 Qe2 26.ef6 g6 27.Bd4 (27.Qh2 Qe3 28.Qe5 Qf2–+) 27...dc4–/+ 28.Qh2 Qe1 29.Qg1 Qh4 30.Qh2 h6 31.Nf3 Qg4 32.Nbd2 Rc8 33.Ng1 c3 34.Bc3 Rc3 35.Qh3 Qh3 36.Nh3 Re3 37.Nf2 Re5 38.Nfe4 Rb5 39.Kg2 Rd5 40.Kf3 b5 41.Ke2 b4 0–1. Ladeira,Paulo – Lorenzo,Alfredo (1885), IECC, 2013.

12.d4 cd4 13.ed4 e4 14.Ne5 dc4 15.Nc4 Bb8 (15...Bf4 16.f3 ef3 17.Rf3= (< 17.Bf3 Qc7 18.Ne5 Ne5 19.de5 Be5 20.Be5 Qe5–/+)) 16.Nc3 (16.f3 Re8=) 16...Nb6 (16...Re8 17.f3=+) 17.Ne3 (17.Ne5 Re8=) 17...Qd6 18.g3 Rd8 (18...Bh3 19.Re1=) 19.Qc2 (better is 19.f3 ef3 20.Bf3 Qd4 21.Ncd5 Qd1 A) 22.Nd1?? Nfd5 (22...Rd5?! 23.Bf6 gf6 24.Bd5 Nd5 25.Nf2–+) 23.Nf2 Nc4–+; B) 22.Nf6 gf6 23.Nd1=) 19...g6?? (better is 19...Qe7=) 20.Ne4+/– Ne4 21.Qe4 f5 22.Qe5 (22.Qf3 Qc7+/–) 22...Qd7?? (better is 22...Be6+/–) 23.Qb8+– ½–½. Steiner,Peter Markus – Wenzel,Hans Peter, Baden–ch JS Eppingen, 2004.

12.d4 cd4 13.ed4 e4 14.Ne5 Qc7 15.b6 (15.Nc3 dc4 16.Nc4 (16.b6 Nb6 17.Nb5 Qb8 18.Nd6 Qd6 19.Nc4 Nc4 20.Bc4 Bd7 21.Qe2 Rc8) 16...Bh2 17.Kh1 Bf4 18.g3 Bg5 19.d5 b6 20.Na4 Qa7 21.Bc3 Bb7; 15.cd5 Ne5 16.de5 (16.b6 Qe7 17.de5 Be5 18.Nc3 Bd7 19.Qb3 Qd6 20.h3 Rc8 21.Rd1 Qc5) 16...Be5 17.Nd2 Ba1 18.Qa1 Qc5 19.Qa2 Bf5 20.Nb3 Qd5 21.Rd1 Qe5) 15...Qb8 (worse is 15...Nb6 16.c5+/– Bc5 17.dc5 Qc5 18.Bd4 Qb4 19.Nc3 Rd8 20.Qd2 Nc4 21.Nc4 dc4) 16.Nc3 dc4 (16...Nb6 17.c5+– Be5 18.de5 Qe5 19.cb6 Be6 20.Nb5 Qg5 21.Qc1 Qg6; 16...Ne5 17.de5 Be5 18.Nd5 Bh2 19.Kh1 Be5 20.Nf6 Bf6 21.Bf6 gf6) 17.Bc4 (17.Nc4 Bh2 18.Kh1 Qf4 19.g4 h5 20.Qd2 hg4 21.Qf4 Bf4) 17...Ne5 (17...Be5 18.de5 Ne5 19.Be2 Neg4 20.g3 Qe5 21.Nb5 Qh5) 18.de5 Be5 19.Nd5 (19.h3 Bf5 20.Nd5 Qd6 21.Be5 Qe5) 19...Bh2 20.Kh1 Be5 21.Nf6 Bf6 22.Bf6 gf6 23.Bd5 Qe5 24.Re1 f5 25.Re3 Kg7 26.Qd2 h6 27.Rg3 Kf6 28.Qh6 Ke7 29.Qg5 Qf6 30.Qf6 Kf6 31.Rc3 Rd8 32.Rc5 Rd6 33.g4 fg4 34.Be4 Rb6?? (better is 34...Be6 35.Rb5 Bc4–/+) 35.Rc8 +=. usingprogram – laur60, internet, 2011.

12.d4 e4 13.Nfd2 cd4 14.Bd4 dc4 15.Nc4 Bb8 16.g3 Re8 17.Nc3 Qe7 18.Qc2 h5 19.Ra1 Nf8 20.Ra8 Bg4 21.Bf6 gf6 22.Bg4 hg4 23.Nd5 Qe6 24.Qd1 Rd8 25.Qg4! Qg4 26.Nf6 Kg7 27.Ng4 Rd1 28.Kg2 Bc7? (better is 28...Nd7 29.f4 Rc1+–) 29.b6 (29.b6 Bd8 30.Rb8+–) 1–0. Schumacher,Dirk (2035) – Schinke,Andreas (2035), Mecklenburg VP LL, 2006.

12.d4 e4 13.Ne5 Qc7 14.cd5 Ne5 (14...Be5? 15.de5 Ne8 16.d6+–; 14...Nd5?! 15.Nd7 Qd7 16.dc5 Bc5 17.Qc2+=) 15.de5 Be5 16.Be5 Qe5 17.Qb3 Nd5 18.Rd1 Be6 19.Bc4 Nc7 20.Be6 Qe6 21.Qb2 h6 22.g3 Nd5 23.Nd2 Nb4 24.Nb3 Nd3 25.Qc3 b6 26.Nc1 Qg4 27.Qc2 Ne5 28.h3 Nf3 29.Kg2 Qe6 30.Ne2 Ra8 31.Nf4 Qf5 32.Rd5?? (better is 32.Qc4–/+) 32…Qd5!!–+ (32...Qd5 33.Nd5 Ne1 34.Kf1 Nc2 35.Nb6 Rb8–+) 0–1. Vuojolainen,Kari – Tuononen,Janne, Joensuu We JoeSK op, 2004.

12.cd5 e4 13.Ne1 Nd5 14.d3 N7f6 15.Nd2 Bf5 16.Nc4 Bc7 17.f3 ed3 (17...ef3 18.Bf3 Be6 19.Bb2=) 18.Nd3 Nd7 (18...Be6 19.Nc5 Bh2 20.Kh2 Qc7 21.Be5 Qc5 22.Bd6 Qb5 23.Bf8=) 19.e4+= ½–½. Woschkat,Karl_Heinz – Carstens,Michael, DESC, 2001.

12.cd5 e4 13.Ng5 h6 14.Nh3 =+.

12.cd5 e4 13.Nh4 =+.

12.cd5 Nd5

13.Qb3 N5f6 14.d3 Qe7 15.Nbd2 Nb6 16.Bc3 Be6 17.Qc2 Bd7 18.Ra1 Nfd5 19.Ba5 Bb8 (worse is 19...Bb5 20.Qb3 Ba4 21.Ra4 Na4 22.Qd5+/–) 20.Qb2 Nc8 21.Nc4 White prepares the advance b6. e5 becomes the focus of attention 21...Re8 22.Nfd2 Bc7 23.Bc7 Nc7 Exerts pressure on the isolated pawn 24.b6 Nd5 25.Bf3 Bc6 26.Ra8 f6 27.Qb3 Kf8 28.Be4 Nd6 (28...Qe6 29.Qa3+/–) 29.Re8 Ke8 30.Nd6 Qd6 31.Nc4 ½–½. Ree,Hans – Pfleger,Helmut, NED–FRG Hengelo, 1968.

13.Nc3 Nc3 14.dc3 Nb6 15.Qc2 c4 16.Rd1 Qc7 17.Ng5 f5 18.e4 f4 (18...Qc5 19.Qb1=+) 19.Nf3–/+ Bd7 20.Qd2 Be7 21.Bc4 (21.Qb2 Qc5–/+) 21...Qc4 22.Ne5 Qb3 23.c4 (23.Nd7 Rd8 24.Qe2 Rd7–+) 23...Be6 24.Qd4 Bc5! 25.Qd2? (25.Qc5 Qd1) 25...Nc4 (25...Bc4 26.Rc1 Kh8 27.Nc4 Nc4 28.Qd7 Bf2 29.Kf1 Ne3 30.Ke2–+) 26.Nc4 Bc4 (26...Qc4?! 27.Rc1 Qb4 28.Qb4 Bb4 29.Be5–+) 27.Rc1 b6 (27...Qb5 28.Qc3 Kf7 29.Qg7 Ke6 30.Qh6 Kd7 31.Rd1 Kc8 32.Qh3 Kb8 33.Bg7–/+) 28.Qd7 Bf2! 29.Kh1 (29.Kf2 Qe3) 29...Bf7 30.Qg4 Bg6 31.Qd7 Qf7 32.Qd3 (32.Qf7 Rf7 33.e5 Bf5–+) 32...f3 (32...Be3 33.Rb1 f3 34.Qe3 Qa2 35.gf3 Qb1 36.Kg2 Qa1 37.Qb3 Kh8–+) 33.Rf1 (33.Qf3 Qf3 34.gf3 Rf3 35.Rc8 Kf7 36.Rc7 Ke8 37.Rc8 Kd7 38.Rc4–+) 33...fg2 34.Kg2 Qa2 (34...Qe6 35.Rf2 Be4 36.Kg3 Bd3 37.Rf8 Kf8 38.Bg7 Kg7 39.Kf3 Qe2 40.Kf4 Qf2 41.Ke5 Qe3 42.Kd6 Qc5 43.Kd7 Bf5 44.Kd8 Qd6 45.Ke8 Bg6) 35.Qd5 Qd5 36.ed5 Be4 37.Kh3 h5 38.Bg7 (38.Rf2 Rf2 39.d6–+) 38...Rf3 39.Kg2 Rf4 40.Kh3 Rh4# 0–1. Scholz,G – Kranzl,A, corr ICCF EU/M/GT/037 (year?).

13.Nc3 Nc3 14.dc3 Qc7 15.Qd3 =.

13.Nc3 Nc3 14.dc3 Qe7 15.e4 Nf6 (15...Nb6 16.c4=) 16.Nd2 Rd8 (16...Be6 17.Qc2=) 17.Qc2 Bc7 (17...Ng4 18.c4=) 18.Nc4 (18.c4 Be6=) 18...Be6 19.Ne3 Ra8 (19...Ba5 20.Bb2=) 20.c4+= g6 (20...Bd6 21.Rd1+=) 21.Bb2 (21.Rd1 Bd6+=) 21...Ne8 (21...Bd7 22.Rd1+=) 22.Nd5+/– Bd5 23.ed5 Nd6 24.Bd3 e4 25.Qc3 f6 26.Be2 Kg7 27.Ra1 Ra1 28.Ba1 Nf5 29.Qa3 b6 30.g3 h5 31.Bf1 h4 32.Bh3 e3= 33.fe3 hg3=+ 34.hg3 Ng3 35.Be6+= Qd8 36.Qa7 Ne4= 37.Qa2 Qh8 38.d6+= Bd6 39.Qa7= Kh6 40.Qb7 Ng3 41.Qf3 Nh5 42.Bg4 Qg8 43.Bh5= gh5 44.Kh1 Be5 45.Be5= fe5 46.Qf6 Qg6 47.Qh8 Kg5 48.Qe5 Qf5 49.Qg3 Qg4 50.Qe5 Kh4 51.Qf6 Kg3–+ 52.Qd6 Kf3 53.Qf6 Ke3 54.Qb6 Qh4 55.Kg1 Qg5 56.Kf1 Qf4 57.Kg1 Qf2 58.Kh1 Qf1 59.Kh2 Qf4 60.Kg1 Qg5 61.Kf1= ½–½. Hirth,U – Storm,R, Biel–op, 1992.

13.Nc3 N5f6 14.Qa4 (14.Qc2 Qe7=) 14...Qc7 (14...Re8 15.d3=) 15.Qh4= h6 (15...Rd8 16.Rd1=) 16.h3 (16.Rc1 Rd8=) 16...b6 17.d3 Bb7 18.Nd2 Ra8 19.Nc4 +=. Katalymov,Boris – Nurmamedow, SU–ch sF, 1960.

9.c4 Nbd7

10.Qb3 0–0=+ 11.Na3 b6 12.Be2 =+.

10.Qb3 0–0=+ 11.Na3 Qe7 12.d3 d4 13.Nc2 (13.Be2 e5=+) 13...e5 (13...de3 14.fe3 e5 15.Qc3=+) 14.e4 (14.Be2 Rd8=+) 14...Bc7–/+ (15.Be2 Ba5 16.Kf1 Qe6=+). Hecht – Teschner, Berlin, 1957.

10.Qb3 0–0 11.d3 b6 12.Be2 (12.Nbd2 A) 12...Qe7 13.Be2 (13.Bc3 Bb7 14.Be2 e5 15.0–0 Ra8 16.Ra1 Ra1 17.Ba1 e4 18.Ne1 Bc7 19.de4=) 13...Bb7 14.0–0 e5 15.Bb2 Ra8 16.Ra1 Ra1 17.Ba1 e4 18.Ne1 Qe6 19.Qc2=; B) 12...Bb7 13.Be2 (13.Qc2 Qc7 14.cd5 ed5 15.Be2 Ra8 16.0–0 Ng4 17.g3 Qd8 18.Bc3 Qe7 19.d4+=) 13...Qe7 14.0–0 Ra8 15.Bc3 e5 16.Ra1 Ra1 17.Ba1 e4 18.Ne1 Qe6 19.Qc2=) 12...Bb7 (12...Qc7 13.cd5 (13.0–0 Bb7 14.Nbd2 Ra8 15.Bc3 e5 16.cd5 Nd5 17.Ra1 Nc3 18.Ra8 Ba8 19.Qc3+=) 13...ed5 14.0–0 Bb7 15.Rc1 Ra8 16.Bc3 Qd8 17.Qc2 Qe8 18.Nbd2 d4 19.Nc4+=) 13.0–0 (13.Nbd2 Qc7 14.0–0 Ra8 15.Bc3 e5 16.cd5 Nd5 17.Ra1 Nc3 18.Ra8 Ba8 19.Qc3=) 13...Qc7 14.Nc3 (14.Nbd2 Ra8+= 15.Bb2 Ng4 16.h3 Nge5 17.Ra1 Ra1 18.Ba1 dc4 19.dc4=) 14...Ne5 (14...d4!? 15.ed4 cd4–/+ (15...Bf3 16.Bf3 Bh2 17.Kh1 Qf4 18.Re1 cd4 19.Ne4–/+) 16.Nd4 Bh2 17.Kh1 Qf4 18.Nf3 Bf3 19.gf3–+; 14...dc4 15.dc4 Bf3 16.Bf3 Bh2 17.Kh1 Bd6 18.Rd1 Ne5 19.Ne4–/+) 15.Ne5= Be5 16.f4 Bd6 17.g3 (17.Bf3 dc4 A) 18.Qc4 Bf3 (18...Ra8= 19.Bb7=) 19.Rf3=; B) 18.dc4 Bf3 19.Rf3=) 17...dc4 (17...d4 18.Ne4 Ne4 19.de4+=; 17...Ra8 18.Bb2 Be7 19.Bf3+=) 18.dc4= Rd8 (18...Re8 19.Rd1=) 19.Qc2 Be7 20.e4 Rd7 21.e5 Ne8 22.Rd1 (22.Bd3 h6=) 22...Rd1 23.Qd1 Qd8 (23...Ba8 24.Bd3=) 24.Qd8+= Bd8 25.Kf2 f5 26.Bf3 (26.g4 g6+=) 26...Bf3+= 27.Kf3 h5 (27...g5 28.h3+=) 28.Bb2 Kf7 29.Bc1 Bc7 30.Be3 g6 31.Na4+/– Ke7 32.h3 Ng7 33.Bf2 Kd7+= 34.Nc3 Bd8 35.Nd1 Ke8 36.Ne3 Kf7 37.Ng2 Be7 38.Ke2 Ke8 39.Ne1 Bd8 40.Nf3 Kf7 41.Ng5 Ke7 42.Kf3 Kd7 43.Nh7 Ke7 44.Nf6 Bc7 45.Ke2 Ne8 46.Nh7 Ng7 47.Nf6 ½–½. Bennett,Hilton (2070) – Goodhue,Nathan, Open, Auckland NZL, 2003. (=1.Nf3 Nf6 2.b4 e6 3.b5 d5 4.Bb2 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.e3 Bd6 9.c4 Nbd7)

10.Qb3 0–0 11.d3 dc4 A) 12.dc4 A1) 12...e5 13.Be2 (13.Qd3 Qc7 14.e4 Rd8 15.Be2 Nh5 16.0–0 Nf4 17.Qe3 Nb6 18.Bc3 Bg4 19.Nbd2=) 13...e4 14.Nfd2 Re8 15.0–0 Qc7 16.h3 Bh2 17.Kh1 Be5 18.Be5 Qe5 19.Nc3=; A2) 12...Qe7 13.Bd3 (13.Be2 e5 14.0–0 Rd8 15.Qc2 e4 16.Nfd2 b6 17.Rd1 Bb7 18.Bc3 Qe6 19.Nb3+=) 13...e5 14.e4 Nh5 15.0–0 Nf4 16.Nc3 Nf6 17.Nd5 N6d5 18.cd5 Qf6 19.Bc4+=; B) 12.Qc4 B1) 12...Re8 13.Nbd2 (13.Be2 b6 14.Nbd2 e5 15.0–0 Qe7 16.Bc3 Bb7 17.Ra1 Nd5 18.Bb2 Nc7 19.e4=) 13...e5 14.Ng5 Re7 15.Be2 Nb6 16.Qh4 Bf5 17.0–0 Rd7 18.Ngf3 Qe7 19.Bb2=; B2) 12...Nb6 13.Qc1 (13.Qc2 Nbd5 14.Qc1 Qa5 15.Nbd2 Bd7 16.e4 Nb4 17.e5 Nc2 18.Qc2 Qa1 19.Ke2–/+) 13...Bd7 14.Na3 Nbd5 15.e4 Bf4 16.Nd2 Nc7 17.Qc5 Bb5 18.Nb5 Bd2 19.Ke2=.

10.Qc2 0–0 11.d3 e5 12.Be2 d4 13.0–0 Qe7 14.Re1 de3 15.fe3 e4 16.de4 Ne4 17.Bd3 f5 18.Nc3 Ndf6 19.Nd5 Nd5 20.cd5 h6 21.Bb2 b6 22.Bc4 Kh7 23.g3 Re8 24.Qd3 Bb8 25.Bb3 Qf7 26.Ra1 Qg6 27.Nh4 Qd6 28.Qe2 Ng3 29.hg3 Qg3 30.Ng2 Re4 31.d6 (31.Kf1!?+=) 31...Rg4 32.Qf2 (32.Bd5!?+=) 32...Qd6–/+ 33.Bd1 Qh2 34.Kf1 Rb4 35.Bc3 Be6 36.Bb4? Bg3–+ (36...Bg3 37.Qg3 Qg3–+) 0–1. Rooijen Van,Peter (1645) – Zhdanenia,Konstantin A (1870), SD–2011–0–00123, 2011.

10.Nc3 0–0 11.d4 =+.

10.Nc3 b6 11.d4 Bb7 =.

10.Nc3 b6 11.Be2 Bb7 12.0–0 Qc7 13.h3 0–0=+ 14.d3 Rd8 15.Qb1 Ne5 16.cd5 ed5 17.Ne5 Be5 18.Rc1 d4–/+ 19.Nd1 Nd5 20.ed4 Nf4 21.Bf1? Nh3!–+ 22.Kh1 Bf4 23.Rc2 Qe7 24.f3 Qe1 25.Nc3 Qg3 (26.gh3 Bf3 27.Bg2 Qh2#) 0–1. Rebber,Christian (2150) – Sandipan,Chanda (2510), Muensterland op, 2002.

10.Nc3 b6 11.Be2 dc4 12.Bc4 Bb7 13.0–0 =+.

10.d3 0–0 11.Be2 Qc7 12.0–0 dc4 13.dc4 e5 14.Nfd2 =.

10.d3 0–0 11.Be2 Qc7 12.0–0 e5 13.g3 (13.cd5 Nd5 14.Nc3 Nc3 15.Bc3 Nb6=) 13...e4 (13...dc4 14.dc4 Rd8 15.Qc2=) 14.de4 de4 15.Nfd2 Ne5 (15...b6 16.Qc2 Bb7 17.Nc3=) 16.Nc3 Bh3 17.Nce4 (17.Re1!? Bf5 18.Qc2+=) 17...Ne4=+ 18.Ne4 Bf1 19.Kf1 (19.Bf1 Rd8=+) 19...Be7 (19...Rd8 20.Kg2 Ng6 21.Nd6 Rd6 22.Qc2=) 20.Bc3 Rd8 (20...Ng6 21.Bg4=) 21.Qa1= h6?? (better is 21...f6=) 22.Be5+– (22...Qb6 23.Bg7+–) 1–0. mtr – bakkeljauw, internet, 2001.

10.d3 0–0 11.Be2 Qc7 12.Nbd2 b6 13.0–0 Bb7 14.Bb2 dc4 15.Nc4 (15.dc4 e5 16.Nh4 e4=+) 15...Bf3–/+ 16.gf3 (16.Bf3 Bh2 17.Kh1 Be5–/+) 16...Bh2 17.Kg2 Bd6 18.d4 (18.f4 e5–/+) 18...cd4 (18...Be7 19.Rh1–/+) 19.Qd4 Bc5 (19...Be7 20.Rh1–/+) 20.Qh4=+ Be7 (20...Rc8 21.Bd3=+) 21.Bd3 h6 (21...g6 22.Rc1=+) 22.Rg1 (22.Qg3 Rc8=+) 22...Nd5?? (better is 22...Nc5 23.Be2 Nd5–/+) 23.Kh1+– (23...Bg5 24.Rg5+–) 1–0. Sokolski,Alexey – Schifman, corr ch SU, 1949.

10.d3 0–0 11.Be2 Qc7 12.Nbd2 b6 13.h3 Bb7 14.0–0 (14.Qc2 Ne5 (14...Ra8 15.0–0 Ne5 16.Be5 Be5 17.Ne5 Qe5 18.Nf3) 15.Ne5 Be5 16.0–0 Ra8 17.Be5 Qe5 18.Nf3; 14.Bc3 Ne5 (14...Ra8 15.Qc2 e5 16.0–0 d4 17.Bb2 h6 18.Nh4) 15.Qa1 Ra8 16.Qb2 Ng6 17.0–0 e5 18.cd5) 14...Rd8 (14...Ra8 15.Qc2 Ne5 16.Be5 Be5 17.Ne5 Qe5 18.Nf3; 14...h6 15.Qc2 Ra8 16.Bb2 Ne5 17.Ra1 Nf3 18.Bf3) 15.Qb1 (15.Qc2 Ra8 16.Bc3 h6 17.Ra1 Ra1 18.Ba1) 15...Ne5 16.Rc1 (16.cd5 Nd5 17.Rd1 Ra8 18.Nc4) 16...Nf3 (16...Ra8 17.Ne5 Be5 18.d4) 17.Bf3 Qe7 (17...Nd7 18.d4) 18.Bb2 (18.Qb3=) 18...Nd7 19.cd5 ed5 20.Qa2 (20.d4!?=) 20...Ne5+= 21.Be5 Be5 22.Qa7 Qc7 23.Qa4 Bf6 24.Qg4 (24.d4 c4+=) 24...Qd7 (24...g6!?–/+) 25.Qd7+= Rd7 26.Rc2 Rd8 27.Ra2 Ra8 28.Ra8 Ba8 29.e4 (29.Kf1 Kf8=) 29...Bg5 30.Nb1 c4 (30...d4 31.Na3+=) 31.ed5= cd3 32.Kf1 Kf8 33.Ke1 Ke8 34.Nc3 Kd7 35.Na4 Bd8 36.Kd2 Kd6 37.Nc3 f5 38.Kd3 Kc5 39.g4 g6 40.gf5 gf5 41.Bh5 Bf6 ½–½. Ramos Moreno,FJ (2105) – Rubio Doblas,Fco Javier (2045), Malaga ESP, Regional Ch, 2013.

10.d3 dc4 11.dc4 Qe7 12.Bd3 0–0 13.0–0 e5 14.e4 Rd8 (14...Nb6 15.Nc3=) 15.Nc3 Nb6 16.h3 (16.Re1 Bg4=) 16...h5 (16...Qd7!?=) 17.Re1+= (White fights for the initiative) 17...Bc7 (17...Nbd7 18.Nd5 Qe6 19.Ng5+/–) 18.Nd5+/– Nbd5 19.ed5 Re8 (19...Nd7 20.Bf5+–) 20.Ne5 Qd6 21.Nf3 Re1 (21...Bd7 22.Re8 Ne8 23.Be5+–) 22.Qe1 Bd7 (22...Kf8 23.Qe3+–) 23.Qe5 (23.Qe3 Ne8+–) 23...Qe5 24.Ne5 b6 (24...Kf8 25.Kf1+–) 25.Kf1 (25.f4 g6+–) 25...Kf8 26.Ke2 g5 (26...Bc8 27.Nc6+–) 27.Nf3 (27.Nd7?! Nd7 28.Ke3 Be5 29.Be5 Ne5+–) 27...g4 (27...Ke7 28.Ng5 Ne8 29.Nf3+–) 28.Bf6 gf3 29.Kf3 Ke8 30.Ke4 (30...Bd8 31.Bd8 Kd8 32.Kf4+–) 1–0. Sternik,Ryszard – Wilk, corr Poland, 1994.

10.d3 e5 11.Be2 d4 12.ed4 (12.0–0 0–0=) 12...ed4=+ 13.0–0 0–0 14.Ng5 Qc7 15.g3 Ne5 16.Nd2 Re8 17.Kh1 ½–½. Rosner,Dirk – Heinrich, corr, 1989.

10.d4 0–0 11.Nc3 Qa5 12.Qa4 Qc7 13.Qb3 (13.cd5 ed5 14.Be2 c4=+) 13...cd4–/+ 14.Nd4 Nc5 (14...e5 15.Nf3 dc4 16.Bc4=+) 15.Qc2 Qa5 (< 15...Bh2 16.b6 Qb8 17.cd5+=) 16.Qa2 (16.Bb2 e5 17.Nf3 Nce4–/+) 16...Qa2 (16...Bc7!? 17.Qa5 Ba5–/+) 17.Na2=+ Bd7 18.Nf3? (18.Nc2!? Ra8 19.Nc1=+) 18...Nfe4 (18...Ra8 19.Bf6 Ra2 20.Be5 Be5 21.Ne5 dc4 22.Nd7 Nd7 23.Be2–+) 19.Nc3 (better is 19.Bd4 Ra8 20.Nc1 dc4 21.Bc4–/+) 19...Ra8–+ 20.Bb2 Nc3 21.Bc3 Ne4 22.Bd2 (22.Ne5 Bb5!! 23.cb5 Nc3 24.Nd3–+) 22...Ra1 23.Ke2 dc4 (23...Nd2 24.Kd2 dc4 25.b6 Bb4 26.Kc2 Ba4 27.Kb2–+) 24.Nd4 Ra2 25.Nf3 (25.f3 Nd2 26.Ke1–+) 25...c3 (26.Kd3 cd2 27.Nd2 Nf2 28.Ke2 Nh1–+; 25...Bb5 26.Nd4 c3 27.Kf3 Nd2 28.Kg4 Bf1 29.Kh3–+) 0–1. Berlik,Jan – Buczinski,Henryk, Siemianowice Slaskie, 1966.

10.d4 0–0 11.Nc3 cd4 12.Qd4 Qa5 13.Bb2 –+.

10.d4 0–0 11.cd5 Nd5 12.Nc3 N7f6 =.

10.d4 cd4 11.Bd4 0–0 =.

10.Be2 Qc7 11.d4 (11.0–0 0–0+=) 11...cd4–/+ 12.Nd4 (12.Bd4 e5 13.Bb2 dc4+=) 12...Bb4 (12...dc4 13.Nd2 Bb4+=) 13.Bc3 Bc3 14.Nc3 dc4 (14...Nb6 15.Qc2+=) 15.0–0+= 0–0 16.Qc2 (16.Na4 e5 17.Nf5 c3 18.Ne7 Kh8+=) 16...Nb6–/+ 17.Rc1 e5 18.Nf3 Be6 (18...Bg4 19.Na4 Na4 20.Qa4–/+) 19.Ng5 Rc8 (19...g6 20.Ne6 fe6 21.Na4=) 20.Ne6 (20.Nce4!? Nfd7 21.Ne6 fe6 22.Bg4=) 20...fe6–/+ 21.Ne4 Ne4 22.Qe4 c3 23.Bd3 (23.Bg4 Qd6 24.Rd1 Nd5–/+) 23...g6–/+ 24.h4 Nd5 (24...Rd8 25.Bc2–/+) 25.Qg4 (25.h5 gh5 26.Qh4 Qf7+=) 25...Re8 (25...Qd7!?–/+) 26.h5+= Nf6 27.Qg5 (27.Qa4!?+=) 27...Nh5–/+ 28.Qg4 Rc8 (better is 28...Nf6 29.Qc4 Qc4 30.Bc4 Kf8–/+) 29.Qe6+= Kg7 30.b6 Qc6 (30...Qc5 31.g4 Nf6 32.g5+=) 31.Qe5 (31.Qe7!? Kh8 32.Ba6+/–) 31...Nf6= 32.Qe7 Kh8 33.Qe5 Qb6 (33...Kg7 34.Qe7 Kh6 35.Qe5 Kg7=) 34.Rc3+= Rc3 35.Qc3 Kg8 (35...Kg7 36.Qe5 Qb3 37.Qe7 Qf7 38.Qc5+=) 36.Bc4 (36.g4 Qd8+/–) 36...Kg7+= 37.Qe5 Kf8 38.Qb8 ½–½. Bouvier,Clement (1880) – Kambrath,Yannick (2035), 9e Tournoi d'Automne – Tournoi A, 2010.

10.Be2 e5.

9.Be2 Qe7

10.0–0 0–0 11.c4 (11.Be5 Nbd7 12.Bd6 Qd6=) 11...Nbd7 (11...e5 12.d4 cd4 13.ed4=) 12.d4 b6 (12...Rd8 13.cd5 Nd5 14.Nc3=) 13.dc5 (13.Ne5 cd4 14.Nc6 Qe8 15.Bd4 Bb7+=) 13...Bc5 (13...bc5 14.Nbd2=) 14.Qc2 (14.cd5 Nd5 15.Nc3 Bb7=) 14...Bb7 15.Nbd2 (15.cd5 Nd5 16.Rd1 Rc8=) 15...Ra8 (15...Rc8 16.Rc1=) 16.Rb1 (16.Rd1 Rc8=) 16...h6 (16...Bd6 17.Rd1=) 17.Bd3 (17.Rd1 e5=) 17...e5 18.cd5 Nd5 (18...Bd5 19.Bc4=) 19.Bf5 (19.Bc4 Bd6=) 19...N5f6 20.Rd1 Rc8 (20...Bd5 21.Nc4=) 21.Ne4 (better is 21.Qa4=) 21...Ne4?? (21...Bd4 22.Nf6 Qf6+/–) 22.Rd7+– (22.Bd7 Ra8 23.Bc6 Bc6 24.bc6 Ng5 25.Ne5 Qc7+/–) 22…Be3?? (22...Bb4 23.Qc8! Bc8 24.Re7 Bf5 25.Re8 Kh7 26.Ne5 Nd6+–) 1–0. Boehnke,Hartmut – Klawitter,Bernd, DESC, 2001.

10.0–0 e5 11.Bb2 +=.

10.Be5 Nbd7 11.Bd6 Qd6 =.

10.Be5 Be5 11.Ne5 Nbd7 =.

10.Ne5 0–0 =.

10.Ne5 Nfd7 11.d4 (11.Nd7 Nd7 12.Nc3 Nf6=) 11...0–0 (11...cd4 12.Nd7 Nd7 13.Qd4=) 12.0–0 f6 (12...c4 13.f4=) 13.Nf3 (13.Nd7 Nd7 14.c4 Nb6 15.cd5 cd4 16.Bd4 Nd5=) 13...b6 14.c4 dc4 (14...Bb7 15.Nc3=) 15.Nbd2 (15.Bc4 Bb7=) 15...Rd8 (15...Bb7 16.Nc4 Bd5 17.Qc2+=) 16.Bc4 Bb7 17.Qb3 Nf8 (17...Re8 18.Rc1+=) 18.Nh4 (18.Rd1 Nbd7+=) 18...Kh8 (18...Qc7 19.Be6 Ne6 20.Qe6 Kf8 21.Nhf3+=) 19.f4 (19.Rd1 cd4 20.Bd4 Nbd7+=) 19...Qe8 (19...Rc8 20.e4=) 20.Nhf3 cd4 21.Bd4 Nbd7 22.Qb2 Ng6 23.Ra1 Bb8 24.Ng5 fg5–/+ 25.Bg7 Kg8 26.Bh6 Nde5 27.Rf1?? gf4–+ 28.ef4 Nh4?? 29.Bg5?? Rd2–+ 30.Qd2 Nc4 31.Qa2 Nf5 32.Qc4 Ne3 33.Qd4? Nf1 34.Kf1? Qb5 35.Ke1 Qb1 36.Kd2 Qa2 37.Ke1 Qa3 38.Kf1? Ba6 39.Kf2 Qc5 (40.Qc5 bc5–+) 0–1. Massana,Jorge (2240) – Taleb,Moussa (2205), ol (Men) Moscow RUS, 1994.

10.Ne5 Ne4 11.0–0 =.

8.Nf3 Nbd7

9.c4 dc4 10.Bc4 Nb6 11.Be2 Nbd5 12.0–0 Bd6 13.Na3 0–0 14.Nc4 Bb8 15.Qb1 h6 16.Rd1 Qe7 17.d4 cd4 18.Bd4 Bd6 (18...Rd8!?+=) 19.Nd6+/– Qd6 20.Rc1 (better is 20.Bf6 gf6 21.Qe4+/–) 20...Bd7? (better is 20...Rd8+/–) 21.Bc5+– Qb8 22.Bf8 Kf8 23.Qa1 b6 24.Ne5 Qd6 25.Nd7 Qd7 26.Qa8 Ne8 27.Qc6 Qa7 28.Bf3 Qa3 (28...Ndf6 29.Qc8+–) 29.Bd5 ed5 30.Rd1 Qd6 (30...Qb3 31.Rf1+– (worse is 31.Qd5 Qd5 32.Rd5 Ke7+–)) 31.Rd5 (31.Qd5?! Qd5 32.Rd5 Ke7+–) 31...Qc6 32.bc6 Ke7 33.Rd7 Ke6 34.Rb7 Kd6 35.Rb6 (35.Rf7 b5+–) 35...Nc7 36.f4 Kc5 37.Rb8 Kc6 38.Rf8 f6 39.Rf7 Ne6 40.f5 Ng5 41.Rg7 Kd5 42.Kf2 Ke4 (42...Ke5 43.h4 Ne4 44.Kf3+–) 43.h4 (43.h4 Kf5 44.hg5 hg5 45.Kg3+–) 1–0. Jacobi,Karl Heinz (2150) – Zander,Klaus (1635), GER–chT Seniors, 2008.

9.c4 dc4 10.Bc4 Bd6 11.0–0 0–0 12.d4 Nb6 13.dc5 Bc5 14.Qd8 Rd8 15.Bf6 gf6 16.Be2 Na4 17.Rd1 Rd1 18.Bd1 Nb6 19.Nc3 Bd7 20.Na4 Na4 21.Ba4 Kf8 22.Kf1 Ke7 23.Ke2 Kd6 24.Kd3 Bb6 25.Nd2 Bd8 26.Kc4? f5 27.Nf3 Be7 28.Bc2 f6 29.Nd4 Kc7 30.Bd3 Bd6 31.g3 Kb6! 32.f4 Bc5! 33.Kc3 Bd4 34.Kd4 Bb5 35.Bb5 Kb5 36.e4 fe4 37.Ke4 Kc4 38.g4 b5 39.f5 ef5 40.Kf5 b4 41.Kf6 b3 42.Kg7 b2 43.Kh7 b1Q 44.Kh6 Qg1 0–1. mtr – test01, internet, 2001.

9.c4 Qc7 10.d3 b6 11.Be2 Bb7 12.Nbd2 Bd6 13.h3 0–0 14.0–0 Ra8 15.Qc2 h6 16.Bb2 Be7 17.d4 cd4 18.Nd4 Ne4 19.Ne4 de4 20.Nb3 Ra2 21.Rd1 Nf6 22.Nd2 Nd7 (22...e5!?=) 23.Qb1+= Ra4 24.Ne4 Rb4 25.Nc3 Bf6 26.Qc2 Nc5 27.Ba1 Bh4 28.Na2 Ra4 29.Bd4 Ra5 30.Bf3 Bf3 31.gf3 e5 32.Bc3 Ra8 33.Nb4 Qc8 34.Kh2 Qe6 35.Nd5 Rc8 36.Bb2 Nd7 37.Qe4 Bg5 (37...Bf2? 38.Kg2+–) 38.Ra1 f5 39.Qd3 Nc5 40.Qc3 Bf6 41.Ra7 Rd8 42.Nf6 gf6 43.Ba3 Rd7 44.Ra8 Kh7 45.Bc5 bc5 46.Rc8 Rg7 47.Rc5 1–0. Buczinski,Henryk (2195) – Kulczycki,Michael (1970), WC–2015–P–00002, 2011.

9.c4 Be7 10.d3 0–0 =.

9.c4 Be7 10.Be2 0–0 11.0–0 b6 12.Qc2 Bb7 13.d3 Bd6 14.Nbd2 Qc7 15.h3 Ra8 16.Bb2 Bc8 17.d4 Ra2 (17...cd4 18.Nd4 e5 19.Nc6=) 18.Qb1 Qa7 19.Bd1 Qa8 20.Bb3 Bb7?? (better is 20...Ra5=) 21.Qa2+– (21...Qd8 22.Ra1+–) 1–0. Kirdin – Tourenin, URS, 1990.

9.c4 Be7 10.Be2 dc4 11.Na3 =+.

9.d3 Qa5 10.Nbd2 +=.

9.d3 b6 10.Nc3 Be7 11.Be2 0–0 12.Qd2 Qc7 13.0–0 Bb7 14.Bb2 Ra8 15.Ra1 Ra1 16.Ba1 h6 17.d4 cd4 18.Nd4 Nc5 19.f4 Nce4 20.Ne4 Ne4 21.Qe1 Bc5 22.Bd3 Be7 23.Nb3 Bf6 24.Be4 de4 (24...Ba1 25.Qa1 (worse is 25.Na1 de4 26.Qd2 Qc5–/+) 25...de4 26.Nd4=) 25.Bf6+= gf6 26.Nd4 f5 27.Qb4 Qd8 28.Kf1 Qd7 29.Ke1 Kg7 30.c4 Qd8 31.Qa3 Qa8 (better is 31...Kg8+=) 32.Qa8+– Ba8 33.Ne2 Kf6 34.Nc3 Ke7 35.Na4 Kd6 36.Nb6 Bb7 37.Na4 1–0. Idelis – M54, playchess.de, 2004.

9.Be2 Qa5 10.Bc3 Qc7 11.0–0 Bd6 (11...e5 12.d4 cd4 13.ed4+=) 12.Bb2 (12.d4 c4=) 12...e5 13.h3 e4 (13...Nb6 14.d4 cd4 15.ed4+=) 14.Ne1 (14.Nh4 0–0=) 14...Ne5 (14...0–0 15.d4+=) 15.d3 (15.d4 cd4 16.Bd4 b6=) 15...Be6 (15...0–0 16.d4 cd4 17.Bd4=) 16.Nd2 (16.f4 ef3 17.Nf3 0–0+=) 16...0–0 17.de4 (17.d4 cd4 18.Bd4 Ra8+=) 17...de4 18.c4 (18.f4 ef3 19.Nef3 Rd8+=) 18...Ned7 (18...Rd8 19.Qb1 Bf5 20.Nc2+=) 19.Qb1 (19.f4 ef3 20.Nef3 b6=) 19...Be5 (19...Bh2 20.Kh1 Be5 21.f4 ef3 22.Nef3+=) 20.Nc2 (20.Bc1 Nb6=) 20...Nb6+= 21.Be5 (21.Qa1 Bb2 22.Qb2 Rd8+=) 21...Qe5 22.Qb3 Rd8 (22...Qg5 23.Kh2+=) 23.Nb1 (23.Rd1 Qg5 24.Kh2 Qf5+=) 23...h5 (23...Qg5 24.Kh1+=) 24.Nc3 Nc4 (24...Rd2 25.Na3+=) 25.Bc4= Rd3 26.Be6 (26.Bd3 Theme: Deflection from b3 26...Bb3) 26...fe6 27.Nd4 (27.Rd1 Rc3 (worse is 27...Qc3 28.Rd3 Qd3 29.Qe6 Kf8 30.Qc8 Ke7 31.Qc5 Qd6 32.Qd6 Kd6 33.Nd4+/–) 28.Rd8 Kh7+=) 27...Nd5 (27...cd4 28.ed4 Rd4 29.Ne2–/+) 28.Nde2 Nc3 29.Nc3 Rc3 30.Qb2 Qf6 31.Ra1 (31.Qb1 Rd3=) 31...Rd3 32.Qf6 (32.Ra8 Kh7 33.Qf6 gf6=) 32...gf6+= 33.Ra8 Kf7 34.Rc8 ½–½. Junge – Franke,Claus Peter, corr ICCF WT–M–GT–85, 1978.

9.Be2 Bd6 10.c4 e5 11.0–0 e4 12.Ne1 0–0 13.f4 ef3 14.Nf3 Qc7 15.cd5 Nd5 16.Qb3 N7b6 17.Na3 Be6 18.Nc4 f6?? (18...Ra8 19.Qc2 Nb4 20.Qc3=) 19.Nd6?? (better is 19.Nb6 Qb6 20.Bc4 Bh2 21.Nh2+–) 19...Qd6= 20.Qb2 Qc7 21.Nh4 Qd7 22.Qc2 c4 23.Bd4 (23.Bc4? Rc8 24.e4 Rc4–+ (24...Nc4?! 25.ed5 Qd5 26.Nf5 Bf5 27.Qf5 Qf5 28.Rf5–/+)) 23...Qd6 24.Nf5 (< 24.Bc4 Nc4 25.Qc4 Ne3–/+) 24...Bf5 25.Rf5 Rc8 26.Qe4 g6 27.Rf1 f5 28.Qh4 Nd7 29.Qg5 Qe6 30.Bf3 b6 1–0. Althoff,Guntram (2145) – Dominguez Marquez,Cecilio, Mislata op–B, 2003.

9.c4 b6

10.Nc3 Bb7 11.cd5 ed5 12.d4 c4 13.Be2 Bd6 14.Qc2 0–0 15.0–0 Qc7 16.Rc1 Ra8 17.Bb2 h6 18.Bd1 Bb4 19.Nd2 Nf8 20.Ra1 Ra1 21.Ba1 Ba5 22.Qa4 Ne6 23.Nf3 Qe7 (23...Ng5!? 24.Ng5 hg5–/+) 24.Ne5= Nc7 25.h3 Qe8 26.Bc2 (26.Bf3 Bc3 27.Bc3 Bc8=) 26...Nd7+= 27.Ng4 f6 28.Nh2 Nb8 29.Nf3 Bc3 30.Bc3 Nb5 31.Bb4 Bc6 32.Qa1 (32.Qa2 Bd7+=) 32...g5 33.Qb2 Na6 34.Bd2 Qe7 35.Ba4 Nac7 36.Nh2 Be8 37.Bb4 Qe6 38.Nf1 h5 39.Ng3 h4 40.Ne2 Kg7 41.Bd2 Qc8 42.Qb1 Kg8 43.Qb2 Qa8–/+ 44.Qb4 Qd8 45.Bb5 Nb5–/+ 46.e4 Qd6 47.Qd6+= Nd6 48.ed5 Kf7 49.f3 Ke7 50.Bb4 Bf7 51.Nc3 Kd7 52.Ne4 Ne8 53.Nc3 Nc7 Attacks the isolani on d5 54.d6 Nd5 55.Nd5 Bd5 56.Kf2 f5 57.Ke2 b5 58.Kd2 Bb7 59.Ke3 Ke6 60.Ke2 Bc6 ½–½. Morley,Paul (2275) – Fourie,M. J (2375), corr WS/MN/033 ICCF, 2008.

10.d3 Bb7 11.Be2 Qc7 12.Nbd2 Bd6 13.0–0 0–0 14.h3 Ra8 15.Qc2 Qb8 16.Bb2 Bf8 17.Ra1 Ra1 18.Ba1 Qa8 19.Bc3 h6 20.Qb2 Ne8 21.Ne5 Ne5 22.Be5 Nd6 23.Qa1 Qa1 24.Ba1 dc4 25.Nc4 ½–½. Lins,Thomas (2170) – Poess,Frank (2190), GER–ch33 V5 email, 2002.

10.d4 Bb7 11.Nbd2 cd4 12.Bd4 Bb4 13.cd5 Bd5 14.Be2 e5 15.Bb2 (15.Be5 Bf3 Decoy; 15.Ne5 Bg2 Pinning (15...Bg2 Deflection)) 15...Bf3 16.Bf3 Nc5 17.Bc6 Ke7 18.0–0 (better is 18.Bc1+=) 18...Qd2–+ 19.Qa1 Rd8 20.Be5 Kf8 (20...Ba5!?–/+) 21.Bc7+= Bc3 22.Qa3 Bb2 ½–½. pcmvr – Korchnoi, playchess.de, 2004.

10.d4 Bb7 11.Nbd2 Be7 12.Be2 0–0 13.0–0 Qc7 14.Qb3 Rc8 15.Bb2 (15.Rc1 cd4 16.Bd4 e5=) 15...Bd6 16.h3 (16.Rc1 Ne4+=) 16...Be7 (16...cd4 17.Nd4 Nc5 18.Qd1+=) 17.Ra1 Ra8 (17...cd4 18.Nd4 Nc5 19.Qd1=) 18.Ra8 Ba8 19.Qa2 (19.Ba3 dc4 20.Nc4 Be4=) 19...Bb7 20.Bd3 (20.cd5 Bd5 21.Bc4 Qb7=) 20...Qc8 (20...cd4 21.Nd4 (21.Bd4? e5–+) 21...Ne5 22.Be2+=) 21.Qb1 (21.cd5 ed5 22.dc5 bc5=) 21...h6 (21...cd4 22.Bd4 dc4 23.Nc4 Bf3 24.gf3=) 22.Ne5 (22.cd5 Nd5 23.Nc4 Qe8=) 22...Ne5 (22...cd4 23.Bd4 Ne5 24.Be5=) 23.de5 Nd7 24.f4 (24.Qd1 Qc7 25.Qh5 Nf8+=) 24...Nf8 25.Qd1 (25.Qc2 Qd7=) 25...Qd8 (25...Qd7 26.Qc2=) 26.Qe2 (26.Qc2 Qd7=) 26...Qd7 27.Nf1 dc4 28.Bc4 Bd5 29.Qc2 Bh4 30.Bd3 Bb7 31.g3 Be7 32.Nd2 Bd5 33.e4+= Bb7 34.Nc4 Qd8 35.f5?? f6 36.ef6+= gf6 37.Ne3+/– e5 38.Bc4 Kg7 39.Qe2 Qe8?? 40.Qg4+– Kh7 41.Qg8# 1–0. Delling,Thomas – Schaefer,Sven, Oberliga Ost A, 1998.

10.d4 Be7 11.cd5 (11.Nc3 0–0+=) 11...ed5 12.Ne5 (12.Nc3+=) 12...c4 (12...Bb7!?+=) 13.Nc6= Qc7 14.Ne7 Ke7 15.Bb2 (15.Bc3 Ne4+=) 15...Rd8 (15...Ne4 16.Ba3 Kf6 17.Qf3 Kg6 18.Qg4 Kh6 19.Qh4 Kg6 20.f3+=) 16.Ba3+= Ke8 17.Nc3 (17.f3 Bb7+=) 17...Nf8 18.f3 Ng6 19.Be2 h5 (19...Bb7 20.0–0+=) 20.0–0+/– h4 (20...Bb7 21.Bb4+=) 21.e4 Qf4 (21...h3 22.g3+/–) 22.Bc1 Qd6 (better is 22...Qc7!? 23.Bg5 de4 24.fe4 h3+–) 23.e5+– Ne5 24.de5 Qe5 25.Na4 Kf8 (25...Qe7 26.Re1 Be6 27.Qd4+–) 26.Bc4! d4 (26...dc4 27.Ba3 Double attack (27.Qd8 Pinning; 27.Qd8 Deflection)) 27.Re1 Qc7 28.Qd3 (better is 28.Ba3 Kg8 29.Qc1 Re8 30.Re8 Ne8+–) 28...Kg8 (28...Bf5 29.Qf5 Qc4 30.Nb6 Qc3+–) 29.Bg5 h3 (29...Qd6 30.Bh4 Bb7+–) 30.Bf6 gf6 31.Qg6 Kf8 32.Qf6 Kg8 33.Bf7! Kf8 (33...Qf7 34.Qg5 Double attack (34.Qd8 Deflection; 34.Qd8 Overloading)) 34.Bd5 (34.Bd5 Qf7 35.Qf7#) 1–0. pierre – oppodef, internet, 2010.

10.Be2 Bb7 11.0–0 Bd6 12.d3 0–0 13.Nbd2 Qe7 14.Qb3 Ra8+= (14...e5 15.cd5 Nd5 16.Rc1 Ra8 17.Nc4 Bb8 18.Bb2 Qe6 19.Ra1=) 15.Bb2 (15.Bc3 e5+= 16.Ra1 Ra1 17.Ba1 e4 18.Ne1 Bc7 19.de4=; 15.Qc2 e5 16.e4 d4 17.Bb2 Nh5 18.Nb3 Nf4 19.Bc1+=) 15...Ne8 (15...e5 16.Ra1+= (16.Rd1 Qe6 17.e4 d4 18.Ng5 Qe7 19.Ra1+=) 16...Ra1 17.Ba1 e4 18.Ne1 ed3 19.Qd3=) 16.Ra1= Ra1 17.Ba1 Bb8 (17...Nef6 18.Qa4= Qd8 19.cd5=; 17...Nc7 18.Bb2 e5 19.e4=) 18.Qa2 (18.Qc2 Nef6= 19.d4=; 18.Qa4 Nef6 19.Qc2=) 18...f6 (18...Nef6 19.Qc2=) 19.Bb2 (19.Bc3=) 19...Nd6 20.Qa4 (20.Qb1 Qe8=) 20...Nf8 (20...dc4 21.dc4 e5 22.Ne1=) 21.h3 (21.d4 Nc4 22.Nc4 dc4 23.Qc4 Nd7=) 21...Qc7 (21...dc4 22.Nc4 Nd7 23.Nfd2=) 22.Kf1 (22.cd5 ed5 23.d4 c4=) 22...Nf7 (22...e5 23.cd5 Bd5 24.Ne4=) 23.d4 (23.cd5 ed5 24.Kg1 Qd7=) 23...Nd6 (23...cd4 24.Bd4 e5 25.Bb2=) 24.dc5 bc5 25.Kg1 Nd7 26.Qc2 Nb6 (26...dc4 27.e4=) 27.cd5+= ed5 28.Bd3 h6 29.Ba3 ½–½. Bendig,Frank (2365) – Baumann,Heinz (2355), RSM2006 remoteschach.de, 2009.

10.Be2 Bb7 11.0–0 Bd6 12.d4 0–0 13.Nbd2 (13.Re1 cd4 14.Bd4 dc4–/+) 13...Qc7 14.dc5 Nc5 (14...Bc5 15.Bd3=) 15.h3 (15.Bf6 gf6 16.cd5 Bd5=) 15...Nfe4 16.cd5 Bd5 17.Nd4 (17.Nc4 f6=+) 17...Ra8 18.Ne4 Ne4 19.Bf3 Bh2 20.Kh1 Be5 21.Qe2 (21.Be4 Be4 22.Qg4 Bd5=+) 21...Bc4 22.Ne6? (better is 22.Qd1!? Bf1 23.Be4–/+) 22...Be6–+ (22...Be2 23.Nc7 Bf1 24.Na8 Ba1 25.Be4 Bb5 26.Nb6+/–; 22...Ra1 23.Ra1 fe6 24.Ra8 Kf7 25.Qc2–/+; 22...fe6?! 23.Be5 Be2 24.Bc7 Bf1 25.Be4=+) 23.Be4 Ra1 24.Ra1 Ba1 (25.Qd3 g6–+) 0–1. Tkachiev,Vladislav (2575) – Karpov,Anatoly (2765), Alma–Ata m2, 1995.

10.Be2 Bb7 11.0–0 Bd6 12.d4 cd4 13.Qd4 Qa8 14.Nc3 Bc5 15.Qf4 dc4 16.Bb2 0–0 17.Ra1 Qb8 18.Qb8 Rb8 19.Nd2 Ra8 20.Ra8 Ba8 21.Nc4 Kf8 22.Na4 Ke7 23.Ne5 Bd5 24.Nd7 Nd7 25.Bg7+/– f6 26.Nc5 Nc5 27.f3 e5 28.e4 Ba8 29.Kf2+– Ne4 30.fe4 Be4 31.g4 Kf7 32.Bh6 Ke6 33.Be3 Bd5 34.Bb6 Kd6 35.Bd8 Ke6 36.b6 Kd7 37.Bf6 Kc6 38.Be5 Kb6 39.Bd3 Bg8 40.Ke3 Kc5 41.Bd4 Kd6 42.h4 Kd7 43.g5 Kd6 44.h5 Kc6 45.Bh7! Bh7 46.g6 Bg8 47.h6 Be6 48.h7 Bd5 49.h8Q Be6 50.Qa8 Kd6 51.Qa6 Ke7 52.Be5 Bd7 53.Qd6 Ke8 54.Bf6 Bf5 55.Qe7# 1–0. Fritz 6 – Caissa, 2007.

10.Be2 Bb7 11.d3 Qc7 12.Nbd2 Be7 13.0–0 0–0 14.Bb2 Ra8 (14...Bd6 15.cd5 Nd5 16.Ne4 Ra8 17.Qc2 Ra5 18.Nd6 Qd6 19.d4 cd4; 14...e5 15.Nh4 Re8 16.Nf5 Bd6 17.Bf3 Bf8 18.cd5 Nd5 19.Nc4 g6; 14...dc4 15.dc4 Bd6 16.Qc2 Ra8 17.Bd3 Ne5 18.Be5 Be5 19.Rd1 Ra1; 14...Rd8 15.Qc2 Ra8 16.cd5 Nd5 17.Rc1 Bd6 18.Ne4 e5 19.Nd6 Qd6; 14...Rc8 15.Qc2 Ra8 16.cd5 Nd5 17.Rc1 e5 18.d4 ed4 19.Bd4 Bd6) 15.Qc2 Ne8 (15...Bd6 16.cd5 Nd5 17.Nc4 e5 18.Ra1 Ra1 19.Ba1 f6) 16.Ra1 Ra1 17.Ba1 Bf6 (17...e5 18.cd5 Bd5 19.Bb2 f6) 18.Bf6 Ndf6 (18...Nef6 19.cd5 Nd5) 19.Qa4 (19.Qc3 Nd6) 19...h6 (19...e5) 20.h3 Nd6 21.Ne5 Nf5 22.Nef3 Nd7 23.Qc2 Qd8 24.Qb2 Qc7 25.Ne1 (25.Qc2 Nd6) 25...Nd6 26.Bf3 Qb8 27.Qa1 Qa8 28.Qa8 Ba8 29.Be2 e5 30.f3 f5 31.g3 g5 32.g4 (32.f4 Kf7) 32...f4 33.e4 d4 ½–½. Buczinski,Henryk (2185) – Kovacs,Arthur (2360), Wc–2012–T–00005, 2010.

9.c4 Nb6

10.Na3 dc4 11.Ne5 Qd5 12.Nac4 Nc4 13.Nc4 Nd7 14.Qa4 e5 15.f3 Be7 16.Be2 0–0 17.0–0 b6 18.e4 Qe6 19.Ne3 Bg5 20.Bc4 Qd6 21.Bc3 Qh6 22.Nf5 Qf6 23.f4 Bh6 24.fe5 Qg5 25.e6 fe6 26.h4 Qh5 27.Be6 Kh8 28.Qa7 Nf6 29.Bc8 Rc8 30.Qb6 Ne4 31.Nh6 Nc3 32.Nf7 Kg8 33.dc3 Rf8 34.Qe6 1–0. de Visser,Arno – Duinmaijer, 1984.

10.Na3 Bd6 11.Qb3 Qc7 (11...0–0 12.d3+=) 12.h3 (12.Bf6 gf6 13.Bd3 Qe7=) 12...e5+= 13.d3 (13.cd5 Nfd5 (worse is 13...Nbd5 14.b6 Qb6 15.Bb5 Ke7 16.Ne5+=) 14.Bc4 Nb4+= (worse is 14...Nc4 15.Nc4 Nb6 16.Nd6 Qd6 17.Ne5+=)) 13...h6 (13...0–0 14.cd5 Nfd5 15.Be2+=) 14.Nd2 (14.cd5 Nfd5 15.Bb2 Nb4+=) 14...Be6 15.Be2 Qe7 (15...0–0 16.0–0+=) 16.0–0 Nh7 (16...d4!?+=) 17.cd5+= Nd5 (17...Bd5 18.Nac4+=) 18.Nac4 Bc7 (18...0–0 19.Qa3 (19.Be5? Be5 20.Ne5 Ne3–+) 19...Bb8 20.Ne5 Bh3 21.gh3 Be5 22.Be5 Qe5 23.Qc5+=) 19.Qa4 (19.Qa3!? 0–0 20.Ne4+/–) 19...0–0= 20.Nf3 Can e5 get defended? (20.Qa7 Bb8 21.Qa3 f6=) 20...f6 21.Rc1 Qe8 (21...Rd8 22.Bb2=) 22.Rb1 (22.Ncd2 b6=) 22...Nb4 (22...b6 23.Rc1=) 23.Bc3 (23.d4 Qg6 24.Rb3 ed4 25.ed4 Ng5 26.dc5 Nh3 27.Kf1 Nc2+=) 23...Qg6 (23...Nd5 24.Bd2=) 24.Ne1 (24.Bb4 cb4 25.b6 Bb8+=) 24...Bc4 Now all is on d3 (24...Ng5 25.Bb4 Nh3 26.Kh1 Nf2 (26...cb4 27.gh3 Bc4 28.Qc2 Bd5 29.e4+/–) 27.Kg1 A) 27...cb4?! 28.Kf2 e4 29.Qc2= (29.Rb4? Bg3 30.Kg1 Be1–+); B) 27...Nh3 28.Kh1 cb4–/+) 25.Rb4 cb4 26.Bb4 Be6 27.Bf8 Nf8 (27...Kf8?! 28.Qa8 Qe8 29.Qb7–/+) 28.Bf3 b6 29.Qa7 (29.Qc2 Qf7–+) 29...Qf7 30.Nc2?? (30.Qb7–+) 30…e4! (30...e4 31.g3 ef3–+) 0–1. De Visser,Arno – Duinmaijer, 1984.

10.Qc2 Nc4 11.Bc4 dc4 12.Qc4 b6 13.0–0 Bb7 14.Ne5? (better is 14.Bf6!? Qf6 15.e4+=) 14...Qa8–/+ 15.Nc3 Bg2 16.Re1 Bd5 (16...Bd6 17.Nf7 Kf7 18.e4–+) 17.Qa4 (17.Nd5 Qd5 18.d4 h5–/+) 17...Bd6 18.Qa8 Ba8 19.Nc4 (19.Na4 Bc7–/+) 19...Bc7 20.Bb2 Bd5 (20...Bf3 21.Ra1–/+) 21.d3 (21.Nd5 ed5 (21...Nd5?! 22.Ra1=) 22.Bf6 gf6–/+) 21...0–0 (21...Ke7 22.Ra1 Bc4 23.dc4–/+) 22.Ra1 Ra8 23.Ra6 Rb8 (23...Bb7 24.Ra8 Ba8 25.f4–/+) 24.Ra7 (24.Nd5 Nd5 25.Ra7=) 24...Bd8 (better is 24...Bc4 25.dc4 Ne8+=) 25.Nd5+– ed5 26.Ne5 (26.Nd6 Ng4+=) ½–½. Jensen,Helmut – Hagen,Horst, GER–chT Seniors, 2004.

10.Qc2 Nc4 11.Bc4 dc4 12.Qc4 Qd5 13.Qa4 Qd3 14.Na3 Nd7 15.Bc3 f6 16.Qc4 Qd6 17.Qe2 Nb6 18.Nh4 Kf7 (18...Qd7 19.e4=) 19.0–0 e5 20.f4 (20.d3 Be6=) 20...ef4 (20...e4 21.Ba5=) 21.Rf4 Nd5 22.Rf1 Qe6 23.Nf3 Kg8 24.e4 Nf4 25.Qe3 Qg4 26.g3 Ng6 27.Qd3 Be6 28.Kf2 (28.Nc2 Nf4 29.Qe3 Nh3 30.Kg2 Bc4+=) 28...h5+= 29.Nc4 h4 30.Ne3 c4 31.Qd4 (31.Nc4 hg3 32.hg3 Rh3+=) 31...Qh5+= 32.Qd8 (32.Nd5!?+=) 32...Qb5 (32...hg3 33.hg3 Qb5 34.Qc7–/+) 33.gh4 Qd7 (better is 33...Nh4!? 34.Rg1 Kf7–/+) 34.Qd7= Bd7 35.Nc4 Nh4 36.Nd4 Ng6 37.Rb1 Rh2 38.Kg3 (38.Kg1!? Rh4 39.Rb7=) 38...Rh3+= 39.Kf2 b5 40.Nb6 (worse is 40.Nb5 Bc5 41.Ne3 Bc6–+) 40...Be8 41.Nb5 Bc5 42.Bd4 Rh2 43.Ke3 Bb5 44.Bc5 Ba6 45.Ra1 Rh3 46.Kf2 Bd3 47.Ra8 Kh7 48.Bd6 Nh4 (48...Be4 49.Ra3 Ra3 50.Ba3–/+) 49.Bg3+= Be4 50.Ra4 Nf5 51.Re4 Rg3 52.Rf4 Rb3 53.Nd5 Kg6 54.Ra4 Rb7 55.d3 Kf7 56.Ra5 Ne7 57.Ne7 Ke7 58.Ke3 Ke6 59.d4 Rd7 60.Ra6 Rd6 61.Ra1 g5 62.Rg1 Rb6 63.Kd3 Kd5 64.Rf1 Ra6 65.Ke3 Ke6 66.Kd3 f5 67.d5 Ke5 Black intends f4 68.Kc4 f4 69.Rg1 Kf5 70.Rd1 (70.Kc5 Ra8 71.d6 f3–+) 70...f3 71.Kd3 (71.d6 f2 72.Kd5–+) 71...g4 72.Ke3 Ra3 73.Kf2 Ra2 74.Ke3 Re2 75.Kd3 Re5 (75...Re5 76.Rf1 Kf4–+) 0–1. pierred (2850) – pcmvr, net–chess.com, 2016.

9.c4 Bd6

10.Qb3 0–0 11.Na3 (11.Bb2 b6+=) 11...Qe7 (11...d4 12.Be2–/+) 12.d3 (12.b6 Qd8+=) 12...d4 13.Nc2 e5 14.e4 (14.Be2!?+=) 14…Bc7 (14...Bc7 15.Be2 Nh5+=). Hecht – Teschner, Berlin, 1957.

10.Nc3 b6 11.Be2 Bb7 12.0–0 Qc7 13.h3 0–0 14.d3 Rd8 15.Qb1 Ne5 16.cd5 ed5 17.Ne5 Be5 18.Rc1 d4 19.Nd1 Nd5 20.ed4 Nf4 21.Bf1? Nh3!–+ 22.Kh1 Bf4?? 23.Rc2 Qe7 24.f3 Qe1 25.Nc3 Qg3 0–1. Rebber,Christian (2150) – Sandipan,Chanda (2510), Muensterland op, 2002.

10.d3 0–0 11.Nbd2 b6 12.Be2 Bb7 13.Qc2 (13.cd5 ed5 (worse is 13...Bd5 14.e4+/–) 14.Nh4 Re8+=) 13...Qc7 14.h3 (14.cd5 ed5 15.0–0 Ra8=) 14...e5+= 15.e4 d4 16.Bb2 Nh5 (16...Ra8 17.Nb3+=) 17.Ne5 Ne5 (17...Be5 18.Bh5) 18.Bh5+= Qe7 19.Be2 (19.0–0 Qh4 20.Be2 f5+=) 19...Qg5 (19...f5 20.0–0+=) 20.g4 (20.0–0!? Qh4 21.Bc1+=) 20...f5= 21.Nf3 (21.h4 Qf4 22.gf5 Rf5+=) 21...Nf3+= 22.Bf3 fe4 23.Be4 Be4 24.de4 Qf4 25.Qe2 Be5 (25...Ra8 26.Kd1–/+) 26.Rg1 (26.h4 Re8 27.f3 Ra8–/+) 26...Qh2 (26...Qf7 27.Rg2 d3 28.Qd3 Bb2 29.Qd5–/+) 27.Qf1 Rf3 (27...Ra8 28.Rg2 Qh3 29.f3–+) 28.Bc1 Qh3 (better is 28...Rh3!? 29.Rg2 Rc3–/+) 29.Qh3= Rh3 30.f4 Bc7 31.Bd2 Kf7 32.Kf2 Ra3 33.Ke2 Ra4 34.Rc1 Ra2 35.Rf1 Ra4 36.e5+= Ra3 37.Rf3 Rf3 38.Kf3+/– g5 39.f5 Be5 40.Bg5 Kg7?? 41.Ke4?? Bf6 42.Bf4+/– Bd8 43.g5 Kf7 44.Kd5 Ke7 45.Kc6 Kf7 46.Kd7 Be7 47.Kc7 (47.Kc7 d3 48.Kb6 Bd8 49.Kc5+–) 1–0. Mroz,Antoni – Guziec,Krzysztof, corr 1AMM Poland, 1991.

10.d3 0–0 11.Be2 b6 12.Nbd2 Bb7 13.Qc2 Qc7 14.0–0 Ra8 15.Bc3 e5 16.cd5 Nd5 17.Nc4 Nc3 18.Qc3 Bd5 19.Ng5 Be7 20.Bf3 Bf3 21.Nf3 f6 22.Ra1 Ra1 23.Qa1 Qd8 24.Qa7 Kh8 25.Qb7 Bf8 26.Nfd2 1–0. marekt – tjrm, ChessWorld.net, 2004.

10.d3 0–0 11.Be2 b6 12.Nbd2 Bb7 13.Qc2 e5 14.cd5 Nd5 15.Nc4 Qe7 16.Qb2 f6 17.Qb3 Kh8 18.Nh4 (18.0–0 Ra8=+) 18...Bc7 (18...Ra8 19.0–0 Qe6 20.Nf5=) 19.Nf5= Qe6 20.e4 (20.Bg4 g6 21.Nh6 f5–/+) 20...Nf4=+ 21.Bf3 Ra8 22.Bb2 g6 23.Nfe3 h5 (23...Bd6 24.0–0 Qg8 25.Qc2=) 24.h4 (24.0–0 Bd6=) 24...Qf7 25.g3 Ne6 26.Nd2 Nd8 (26...Bd6 27.g4 Bc8 28.Qd5+–) 27.Qf7= Nf7 28.g4 hg4 (28...Ra2 29.Ndc4 hg4 30.Bg4=) 29.Bg4 f5 (better is 29...Ra2!? 30.Ndc4 Bc8=) 30.h5+/– fg4 31.hg6 Kg7 32.gf7 Ra5 (32...Ra2 33.Ndc4 Kf7 34.Ng4+–) 33.Ndc4+/– Rb5 34.Ng4 Kf7+/– 35.Nge5 Be5 36.Rh7+= (White fights for the initiative) 36...Ke6 37.Be5 Ne5 38.Rh6+/– Kd7 39.Ne5+– Kc7 40.f4 Rb4 41.Rh7 Kc8 42.Nc4 Ba6 43.Nd6 Kd8 44.Nf7 Ke8 45.Kd2 Kf8 46.Ne5 Rd4 47.Ke3 Rd6 48.Ra7 Bb5 49.f5 Ke8 50.Rb7 Kf8 51.Nc4 Bc4 52.dc4 Rd4 53.Rb6 Rc4 54.Rb7 Rc1 55.Kf4 c4 56.Ke5 (56...c3 57.Kf6+–) 1–0. Myrberg,Johnny – Aurell,Bo, Sweden, 1989.

10.d3 0–0 11.Be2 Qc7 12.Nbd2 (12.Qc2 A) 12...Rd8 A1) 13.Nbd2 e5 (13...b6 14.cd5 Nd5 15.Ne4 Bb7 16.0–0 Nb4) 14.cd5 Nd5 15.0–0 Nb4 16.Qb2 Re8; A2) 13.0–0 dc4 (13...e5 14.cd5 Nd5 15.Nbd2 Nb4 16.Qb2 Re8; 13...b6 14.cd5 Nd5 15.Nbd2 Bb7 16.Ne4 e5) 14.dc4 b6 15.Rd1 Bb7 16.Nbd2 e5; B) 12...b6 B1) 13.0–0 Bb7 (13...e5 14.cd5 Nd5 15.Nbd2 Bb7 16.Nc4 Ra8; 13...dc4 14.dc4 Bb7 15.Nbd2 Ra8 16.Bd3 Be5; 13...Re8 14.Nbd2 Bb7 15.Bb2 Ra8 16.cd5 ed5) 14.cd5 Nd5 15.Nbd2 Ne5 16.Be5 Be5; B2) 13.Nbd2 Bb7 (13...e5 14.cd5 Nd5 15.0–0 Bb7 16.Ne4 Ra8) 14.cd5 ed5 15.0–0 Ra8 16.Rc1 Ra5; B3) 13.cd5 ed5 (13...Nd5 14.Nbd2 Bb7 15.0–0 Ra8 16.Ne4 e5) 14.0–0 Re8 15.Nbd2 Ng4 16.h3 Ngf6; 12.cd5 A) 12...Nd5 13.Nc3 N7f6 (13...b6 14.Nd5 ed5 15.0–0 Re8 16.Qc2 Nf8; 13...Nc3 14.Bc3 b6 15.Qa4 Bb7 16.Qh4 Ra8; 13...Rd8 14.0–0 Nc3 15.Bc3 b6 16.Qa4 Bb7; 13...Qa5 14.Qa4 Qa4 15.Na4 b6 16.Nc3 Bb7) 14.0–0 Ng4 15.Qb3 Bh2 16.Kh1 Nb6; B) 12...ed5 13.0–0 b6 (13...Ng4 14.h3 Ngf6 15.Qc2 Re8 16.Bb2 Qb6; 13...Re8 14.Qc2 b6 15.Nbd2 d4 16.Nc4 de3; 13...Qa5 14.Nc3 Re8 15.Qb3 Nb6 16.Bb2 Bd7) 14.Qc2 Bb7 15.Rc1 Ra8 16.Nbd2 Qd8) 12...b6 13.0–0 (13.cd5 Nd5 (13...ed5 14.0–0 Bb7 15.Bc3 Ra8 16.Re1 Ne5) 14.Nc4 Bb7 15.0–0 e5 16.Nh4 f5; 13.Qc2 Bb7 14.cd5 ed5 15.0–0 Ra8 16.Rc1 Ng4) 13...Bb7 14.Bb2 (14.cd5 Bd5 15.e4 Bb7 16.Nc4 Bf4) 14...dc4 (14...Ra8 15.Qc2 e5 16.cd5 Nd5) 15.Nc4 (15.dc4 e5 16.Nh4 e4) –/+. Sokolski,Alexey – Shifman, corr URS, 1940.

10.d3 dc4 11.dc4 Qe7 12.Nc3 (12.Bd3 e5 13.Nc3 Nb6=) 12...0–0 13.Bd3 b6 14.Qc2 Bb7 15.Ne4 Bc7 (15...Be4 16.Be4 Ne4 17.Qe4=) 16.Nf6 Nf6 17.Ng5 (17.Bf6 Qf6 18.Bh7 Kh8=) 17...h6 18.Nh7 Nh7 (18...Bg2? 19.Nf6 Qf6 20.Bf6 Bh1 21.Bh7 Kh8 22.Bc3+–) 19.Bh7 Kh8 20.Be4 =. Sokolski,Alexey – Poljak, SU, 1948.

10.cd5 ed5 11.Be2 0–0 12.0–0 b6 (12...Re8 13.Qc2+=) 13.d4 Qc7 Black prepares c4 (13...c4 14.Nc3=) 14.Nbd2 (14.dc5 bc5 15.Qd3 c4=) 14...Bb7 (14...c4 15.Qc2+=) 15.g3 (15.dc5 bc5 16.Qc2 Re8=) 15...Ra8 (15...c4 16.Bc3+=) 16.Qc2 (16.dc5 bc5 17.Qc2 Ra3=) 16...h6 (16...c4 17.Bc3+=) 17.Rc1 (17.dc5 bc5 18.Rb1 Qb6=) 17...c4 18.Bc3 Qb8 (18...Qd8 19.Nh4=) 19.Ra1 (19.Nh4 Bf8=) 19...Ra1+= 20.Ba1 Bb4 (20...Qe8 21.Bc3+=) 21.Bc3= Bc3 22.Qc3 Qa8 23.Bd1 (23.Ne5 Qa5 24.Qa5 ba5 25.Nd7 Nd7+=) 23...Qa5 24.Qa5 ba5 25.Bc2 Kf8 (25...Nb6 26.Nb1+=) 26.Nb1 Ne4 27.Be4 (27.Nh4 Nd6 28.Nc3 Nb6+=) 27...de4 28.Nfd2 Nb6 29.Nc3 f5 30.Kf1 Ke7 31.Ke2 Kd6 32.Ndb1 g6 33.Kd2 h5 34.h4 Bc8 35.Na3 Be6 36.Kc2 Bf7 37.Nd1 Be6 38.Nb2 Bg8 39.Kc3 Nd5 40.Kc4 Ne3 41.Kc3 Nd5 42.Kd2 Nb6 43.Ke3 Nd5 44.Kd2 Nb6 45.Nb1 Ba2 46.Nc3 Bb3+= 47.Nb1 ½–½. Kretschmar,Heinz – Ahman,Harry, corr ICCF, 1984.

10.Be2 0–0 (--> 8.Nf3 Bd6 9.c4 0–0 10.Be2 Nbd7).

8.Nf3 Be7

9.c4 Nbd7 10.d3 0–0 11.Be2 b6 12.0–0 Bb7 13.Nbd2 Qc7 14.h3 h6 15.Qc2 Rd8. de Visser,Arno – Schmidt,G, Biel, 1984.

9.Be2 0–0 10.0–0 Nbd7 11.Re1 (11.c4 dc4 12.Bc4 Nb6=) 11...Qc7 12.d3 b6 13.Nc3 (13.Nbd2 Ne8=) 13...e5 14.Bb2 Bb7 15.e4 d4 16.Nb1 Ra8 17.c3 Ra5 18.Qc2 Qb8 (18...Ne8 A) < 19.cd4 cd4 (< 19...ed4 20.Bc1=+) 20.Qb3 Qc5–/+; B) 19.Qb3=+) 19.Na3 (< 19.cd4 cd4 20.Nbd2 Rb5–/+) 19...Qa7 (better is 19...Ne8=) 20.Nc4+/– Rb5 21.Nce5 Ne5 22.Ne5 Qa2 23.Nc4 Qb3 24.Qd2 h6 (24...Nd7!?+/–) 25.Ra1 unclear. Fritz 8 – NN, 2003.

9.c4 0–0

10.Qc2 Nbd7 11.Nc3 Nb6 12.Ng5 (12.cd5 ed5 13.Be2 Re8=) 12...h6–/+ 13.h4 dc4 (13...hg5?! 14.hg5 Ne4 15.Ne4 de4 16.Qe4=) 14.Na4 Nbd5 (14...hg5 15.hg5 g6 16.gf6 (16.Bf6?! Bf6 17.Nb6 Bg5 18.Nc8 Bf6+=) 16...Bf6 17.Bf6 Qf6 18.Nb6 Qa1 19.Ke2+–) 15.Bc4 g6 (15...Re8 16.Nf3=+) 16.Nf3 Nb4 17.Qb1 Ne8 18.Ne5 Bf6? (better is 18...Nd6!? 19.Bb3 c4 (19...Bh4? 20.Ng6 Bf2 21.Ke2+–) 20.Nc4 Nb5=) 19.Nc5+/– Qc7 (better is 19...Nd5!?+/–) 20.Qb4+– Be5 21.Be5 (21.b6!? Qd6 22.Be5 Qe5+–) 21...Qe5 22.d4 Qf5 23.Bd3 Qd5 24.Be4 Qa2 25.b6 Nf6 26.0–0 Ne4 27.Ne4 Bd7?? (27...Qc2 28.Nf6 Kg7+–) 1–0. Otte,Marco – Bonnier,Frans, Wag.Intcomp Wageningen, 2002.

10.Nc3 Nbd7 11.Qb3 Nb6=+ 12.d3 Qd6 13.e4 dc4 14.dc4 Qf4 15.Qc2 Nbd7 (15...Bd7 16.Qd2 Qc7 17.Bd3=) 16.Bb2 (16.Bd3 Rd8=) 16...b6 (16...Rd8 17.Be2=) 17.Bd3 Ng4 (17...Bd6 18.Bc1 Qg4 19.0–0=) 18.h3 (18.Ne2!? Qd6 19.e5 Nge5 20.Bh7 Kh8 21.Ne5 Ne5 22.Be4=) 18...Nge5= 19.Ne5 Ne5 20.Be2 Bg5 (20...Rd8 21.Qc1 Qc1 22.Bc1=) 21.0–0+= Ng6 22.g3 Qc7 23.f4 Bh6 (23...Bf6 24.e5 Be7 25.Bf3+=) 24.e5 (24.Rd1 Rd8+=) 24...Ne7 (24...Bb7 25.Ra1+=) 25.g4 (White is in command) 25...f6 26.ef6 Rf6 27.g5+/– Bg5 28.Ne4 Rf4 29.Ng5 Rf1 30.Kf1 Qf4 31.Nf3 Nf5 32.Qd3 Qc7 33.Ne5 Qe7 34.Bg4 Nd6 35.Kg1 Bb7 36.Nc6 Qf8? 37.Be6 Kh8 38.Be5 Ne8 39.Nd8 Qe7 40.Nf7 Kg8 41.Ng5 (41...Qe6 42.Qh7 Kf8 43.Ne6 Ke7 44.Ng7+–) 1–0. Teichmann,Erik (2290) – Gollasch,Theo Heinz, Hamburg HSK–Elo, 1991.

10.Nc3 Nbd7 11.d4 cd4 12.Nd4 dc4 13.Bc4 Nb6 =.

10.Be2 b6 11.d3 Bb7 12.0–0 Nbd7 13.Nbd2 Qc7 14.h3 (14.cd5 Nd5 15.Nc4 Ra8=) 14...Ra8=+ 15.Qc2 h6 16.Rc1 e5 17.cd5 Nd5 18.d4 ed4 19.Bd4 Bf6 (19...cd4 20.Qc7) 20.Qb2 (20.Bf6 N7f6 21.Bc4 Nb4=) 20...Bd4=+ 21.Qd4?? (better is 21.ed4 Re8 22.Bc4=) 21...cd4–+ 22.Rc7 Nc7 (23.Nd4 Ra2–+) 0–1. Sternik,Ryszard – Szymczyk,Marek, Ostroda, 1990.

10.Be2 Nbd7 11.0–0 Nb6 12.d3 Bd7 (12...Bd6 13.Qc2=) 13.Nbd2 (13.Be5 Ng4+=) 13...Qa8 14.Qc2 (14.Be5 Qa2+=) 14...dc4 (14...Qa4 15.Qa4 Na4 16.Be5+=) 15.dc4+/– Qa4 16.Nb3 Ra8 17.Bb2 Qa7 (17...Ng4 18.Ra1 Qb4 19.Ra8 Na8 20.Nfd2+/–) 18.Ng5 h6 (18...g6 19.Nc5! Bc5 20.Bf6+–) 19.Ra1 (19.Bf6!? Bf6 20.Qh7 Kf8+–) 19...Qb8 (19...Na4 20.Ne4 Ne4 21.Qe4+/–) 20.Ra8 Qa8 21.Bf6 Bf6 22.Ne4 Be7 23.Nec5 Be8 (23...Qc8 24.Nd7 Nd7 25.Qe4+/–) 24.Ne4 Qa3 25.g3 (25.Ned2 Nd7+/–) 25...Na4 (25...Nd7 26.Bf3+/–) 26.Nc3 b6 27.Na4 Qa4 28.Nd4 Qc2 29.Nc2 e5 30.Bf3 Bd7 31.Bd5 Kf8 32.e4 f5 33.f3 fe4 34.fe4 Bc5 35.Kg2 Bg4 36.h3 Bd1 37.Ne1 Ke7 38.Nd3 Bd4 39.Kf1 Kd6 40.Ke1 Bf3+= 41.Kd2 g5 42.Ne1 Bh5 43.g4+/– Bg6 44.Nf3 Bf2 45.Ke2 Bg3 46.Nd2 h5 47.Kf3 Bf4 48.Nb3 Be8 49.Kg2 Be3+/– 50.Kf3 hg4?? 51.hg4 Bd4+/– 52.Kg3 Bd7 53.Kf3 Ke7 54.Kg3 Kf6?? 55.c5!+– Bb5? 56.Nd4 ed4 57.cb6 Ba6 58.b7 Bb7 59.Bb7 (59.Bb7 Ke5 60.Kf3+–) 1–0. Kleinke – Pamperin, Schwerin, 1979.

9.Ne5 0–0

10.c4 dc4 11.Bc4= Qc7 12.f4 Nbd7 13.Nd7 (13.0–0 Nb6=) 13...Nd7 14.Nc3 (14.0–0 Nb6 15.Bd3 Qd7=) 14...b6 (14...Nb6 15.Bd3=+) 15.0–0 (15.Ne4 Bb7 16.Qg4 e5=) 15...Bb7 16.g4 (16.d3 Bf6=) 16...Nf6 17.Qe2 (17.g5 Nd7=+) 17...Ne4 (17...Ra8 18.g5 Ne8 19.Qh5=+) 18.Ne4= Be4 19.d3 Bb7 20.e4 (20.Bc3 Qd7=) 20...Ra8 21.g5 (21.Bc3 Bd6 22.f5 Bc8=) 21...Bc8 (21...Ra1 22.Ra1 Qf4 23.Qg2=+) 22.Qh5 Qd8 23.h4?? (better is 23.Bb2 Ra4 24.Rf3=) 23…Ra1!–+ (24.Ra1 Qd4 25.Kg2 Qb2 26.Kf1 Qa1 27.Kf2 Qb2 28.Qe2 Qc1–+) 0–1. Petersen – Troc, corr 3GMM–07, 1996.

10.c4 Nbd7 11.Nd7 Bd7 12.Be5 =+.

10.c4 Nbd7 11.f4 Bd6 (11...Nb6 12.d3=) 12.Be2= Qc7 13.Nd7 Bd7 (13...Nd7 14.0–0=) 14.0–0 (14.Bf6 gf6 15.cd5 ed5+/–) 14...dc4 (14...d4!?+=) 15.Bc4 (15.Bf6 gf6 16.Bc4 Kh8+=) 15...Nd5 16.Qh5 (16.Qg4 g6+=) 16...Nb6 17.Bg7 Kg7 (17...Nc4?? 18.Bf6 Ne5 19.Qh6 Nf3 20.Rf3 Bb5 21.Qg7) 18.Qg5 Kh8 19.Qf6 Kg8 20.Rf3 (20.Rf3 Ra8 21.Qh6+–) 1–0. Brauer – Erler, corr, 1976.

10.Be2 Nbd7 =.

8.f4 c4

9.Nf3 Qa5 10.Nc3 Bc5 11.Qb1 Bd7 12.Be2 Ne4 (12...0–0!?=+) 13.Ne4 de4 14.Ng5 Qb5 15.Qb5 Bb5 16.Ne4 Be7 17.Bg7 Rg8 18.Bf6 Bc6 19.Be7 Be4 20.Bd6 Rg2 (20...Bg2? 21.Rg1 (21.Bb8 Bh1 22.Bc4 Rg1 23.Ke2 Be4–/+) 21...Nc6 22.Kf2+– (22.Bc4?! Kd7+–)) 21.Bc4 Nd7 22.Bd3 Bc6 23.h4 (< 23.Bh7 Rg7 24.Rf1 Rh7–/+) 23...h5 24.Bf1 Rg4 25.Rh2 Nf6 26.d3 Kd7 27.Be5 Nd5 28.Kf2 Nb4 (28...f6 29.Bb2 Rg6 30.Be2+–) 29.Be2 Rg8 30.c3 Nd5 31.e4 Ne7 32.Bh5 f5 33.Bf3 fe4 34.de4 Ng6 35.Rg2 Ne7 36.h5 Rg2 37.Bg2 Ke8 (37...Ng8+–) 38.h6 Kf7 39.h7 (39...Ng6 40.f5 ef5 41.ef5 Ne5 42.h8Q Ng4 43.Kg3+–) 1–0. Althoff,Guntram (2145) – Navarro Coloma,Antonio (2025), Mislata op–B, 2003.

9.Nf3 Bd7 10.Nc3 Bb4 11.Qb1 Bc3 12.Bc3+= Qb6 13.Qb2 Qb5 14.Bf6 gf6 15.Qf6 Qb1 16.Kf2 Rf8 17.Rg1 Qc2–/+ 18.Be2 Qg6 19.Qb2 b5 20.Ra1 Qg8?? 21.Ra8+/– Ke7 22.Ra7 Nc6= 23.Rd7? Kd7–+ 24.Qb5 Kd6 25.e4 Rb8–+ 26.Qa6 Qc8 27.Qa3 Kd7 28.ed5–/+ ed5 29.Ng5 Qf8 30.Qh3–/+ Kc7 31.Qh7=+ Qc5 32.Kg3 Rb3 33.Bf3=+ Qe7 34.Kg4 Rd3 35.h4 Rd2–+ 36.h5 c3 37.Qb1 Qb4 38.Qb4 Nb4 39.h6 Ra2 40.Bd1 c2?? 41.Bc2=+ Nc2 42.h7 Ra8 43.Nf7= d4 44.Kf3 d3 45.g4 Re8 46.h8Q+/– Rh8 47.Nh8 Kd7 48.Ng6 Ke6 49.Ne5 Ne1 50.Ke3 Ng2+= 51.Kd3 ½–½. Boe,AH – Snahre,Stig Allan, NOR–ch op Oslo, 2002.

7.Ba1 Bc5

8.d4 Bb4 9.Bc3 Bd6 10.Nf3 c6 11.Nbd2 0–0 12.Qb1 Qb6 13.Bd3 Bd7 14.0–0 cb5 15.Ne5 (15.Bb4!?=) 15...b4+= 16.Bb2 Rc8 17.Nd7 Nbd7 18.Nb3 Qc7 19.g3 Ne4 20.Qd1 Ra8 21.Qf3 f5 22.Be4 (22.Ra1 Ra1 23.Ba1 Ndf6–/+) 22...fe4–+ 23.Qe2 Rf8 24.Rc1 Nb6 25.Ra1 Qc6 26.Na5 Qc8 27.Nb3 Nc4 28.Bc1 Na3 29.Ra2 Qc6 30.Kf1 Nb5 31.Bd2 b6 32.Ke1 Rf3 33.Ra8? Qa8 34.Qb5 Qf8 35.Qe2 Qf5 36.Kf1 Qh5 37.Qb5 Rf2! 38.Ke1 Rh2 (38...Rh2 39.Qe8 Qe8 40.Na5 Rh1 41.Kf2 Qf7 42.Ke2 Qf3#) 0–1. Baer,Cy (1895) – Buchmann,Hans_Peter (2250), RSS4D easy–41, 2007.

8.Be2 c4 9.Nf3 Bb4 10.Bc3 Bc5 11.d3 cd3 12.cd3 b6 13.Qa4 Nbd7 14.Qa7 Nf8 (14...0–0 15.0–0=) 15.Ne5+= N8d7?? (better is 15...Qe7 16.Qe7 Be7+=) 16.Nc6+– 0–0 17.Nd8 Rd8 18.0–0 h6 (18...e5 19.d4 ed4 20.Bd4 Bd4 21.ed4+–) 19.Bf6 Nf6 20.d4 Bd6 21.Rc1 Bd7 22.Qb6 Be7 23.Qa6 Bb4 (23...Ne4 24.Bd3 Nd6 25.b6+–) 24.b6 Bd6 (24...Kf8 25.b7 Ke7 26.Qa7+–) 25.b7 Rb8 26.Bb5 (better is 26.Qd6 Rb7 27.Qe7 Bc6 28.Qd8 Be8+–) 26...Be8 (26...Bb5 27.Qb5 Kh7 28.Qd3 g6 29.Qa6+–) 27.Rc8 g5 28.Be8 Ne8 29.Qd6 1–0. michaelbuss – Sirprocyon, ChessWorld.net, 2016.

8.Nf3 b6 9.c4 (9.Be5 0–0=) 9...dc4 (9...0–0 10.d4 Bd6 11.Nc3=) 10.Bc4 0–0 11.0–0 Bd7 (11...Bb7 12.Qe2=) 12.d4 (12.Be5 c6+=) 12...Bd6 13.Nc3 h6 (13...c6 14.Qb3+=) 14.e4 (14.Qb3 Ng4+=) 14...Nh7 (14...Bb4 15.Qd3+=) 15.d5 (15.e5 Be7+/–) 15...ed5 (15...e5 16.Qd3+=) 16.Nd5+/– Ng5 17.Ng5 Qg5 18.Qd4 (18.e5 A) 18...Be5? 19.f4 Bf4 20.Rf4+– (20.Nf4?! Bb5 21.Bb5 Qb5+/–); B) 18...Bc5 19.Nc7 Rc8+/–) 18...Bh3 (18...Re8 19.f4 Qg6 20.f5+/–) 19.Ne3 (19.Qg7!? Qg7 20.Bg7 Kg7 21.gh3+/–) 19...Bc5+= 20.Qd2 (20.Qg7!? Qg7 21.Bg7 Kg7 22.gh3 Be3 23.fe3+=) 20...Qg2?? (better is 20...c6=) 21.Ng2+– (21.Ng2 Nd7 22.Qc3+–) 1–0. Wartig,Wolfgang – Piegeler,x, corr JV2–19, 1996.

8.Nf3 0–0

9.c4 Nbd7 10.d4 Bb4 11.Nbd2 (11.Bc3 Bc3 (11...Bd6 12.c5 Be7 13.Bd3 Re8 14.0–0 Ne4 15.Qc2 f5 16.Bb2 Ndf6+=; 11...Be7 12.c5 Ne4 13.Bd3 Ndf6 14.0–0 Re8 15.Ne5 Nd7 16.Nd7 Qd7+=) 12.Nc3 c5 13.bc6 bc6 14.Qa1 c5 15.cd5 Nd5 16.Nd5 ed5=) 11...c5 (11...c6 12.cd5 cd5 13.Bd3 b6 14.0–0 Bb7 15.Qb3 Qe7 16.Bc3 Bd6=; 11...Ne4 12.Bd3 Nb6 13.c5 Nd2 14.Nd2 Nc4 15.Bc4 dc4 16.Qc2 b6=) 12.bc6 (12.cd5 Nd5 13.Bd3 b6 14.0–0 Bb7 15.Qc2 f5 16.Rd1 Qe7=) 12...bc6 13.Bd3 Ne4 (13...dc4 14.Bc4 c5 15.Qc2 cd4 16.Bd4 e5=) 14.0–0 f5 (14...Ndf6 15.Be4 de4 16.Ne5 c5=) 15.Qc2 Ndf6 (15...Bd2 16.Nd2 Ba6+=) 16.Bb2 (16.Rb1 Qe7=) 16...Qc7 17.Nb3 Ba6 18.Ne5 Qb7 19.Ra1 Ng4 20.Ra6 Qa6? (better is 20...Ne5!? 21.de5 Qa6 22.cd5 Qa7 23.de6 Be1+=) 21.cd5+/– Qa4 22.de6 (22.Ng4 cd5 23.Be4 fe4 24.Na1+=) 22...Ne5 23.de5 Be7 (23...Rb8 24.Qc4 Qb5 25.e7 Qc4 26.Bc4 Kh8+–) 24.Nd4+/– Qc2 25.Bc2 (worse is 25.Nc2 Rb8 26.Be4 fe4–/+) 25...Rb8 26.Nf5 (26.Nc6? Rb2 27.Ne7 Kf8–+) 26...Rb2 27.Be4 Kf8 ½–½. pvanr (1760) – bobinac (1980), gameknot.com, 2009.

9.c4 Nbd7 10.d4 Be7 A) 11.c5 c6 (11...Ne4 12.Bd3 Ndf6 13.0–0 b6 14.c6 Bd6 15.Ne5 Ng5 16.f3 h6+/–; 11...Ng4 12.Nc3 Ndf6 13.Bd3 b6 14.c6 Nh6 15.0–0 Nf5 16.Ne5 Bd6+/–) 12.Nc3 e5 13.Be2 e4 14.Nd2 cb5 15.Bb5 b6 16.c6 Nb8=; B) 11.Qc2 dc4 (11...c6 12.bc6 bc6 13.Bd3 Ba6 14.Nbd2 Nb6 15.Ne5 dc4 16.Ndc4 Nc4=; 11...Kh8 12.c5 c6 13.b6 Ne4 14.Bd3 f5 15.0–0 Bf6 16.Nc3 e5+=) 12.Bc4 Nb6 13.Be2 Qd6 14.e4 Qf4 15.Bd3 h6 16.Ne5 Bd6=.

9.d4 Bb4 10.Bc3 Bd6 =.

9.d4 Bb4 10.Nbd2 Ne4 (10...c6 11.Ne5+=) 11.Bd3 Nd2 12.Nd2 Bd7 (12...c6 13.0–0=) 13.c3 (13.0–0 Qe8 14.c3 Bd6+=) 13...Ba5 (13...Bd6 14.Qh5 g6 15.Qf3+=) 14.0–0+= c6 15.bc6 bc6 (15...Bc6 16.Qh5 f5 17.Rb1+=) 16.Nf3 (16.c4 Qh4+=) 16...Bb6 (16...c5 17.Qc2 cd4 18.Bh7 Kh8 19.Bd3 (worse is 19.Nd4 f5+=) 19...de3 20.fe3+=) 17.c4 (17.Qc2 f5+/–) 17...dc4+= 18.Bc4 c5 19.d5 ed5 20.Qd5 (worse is 20.Bd5 Bb5+=) 20...Bg4?? (better is 20...Be6 21.Qe5 Qf6+–) 21.Qe5+– Bf3 (21...Qf6 22.Qg3 Qf5+–) 22.Qg7 (22.gf3?! Qf6 23.Qf6 gf6 24.Bf6 Nd7+/–) 1–0. pcmvr (2225) – smungiu (2085), net–chess.com, 2006.

9.d4 Bd6 10.Bd3 +=.

9.Be2 Nbd7 10.0–0 Bb4 (10...Bd6 11.d4=) 11.Bb2 Qe7 12.d4 Nb6 13.c3 Bd6 14.Nbd2 (14.Qb3 Ne4=) 14...Bd7 15.Qc2 c6 16.bc6 Bc6 17.Ra1 Qc7 (17...Rc8 18.Qb3 Qd8 19.Ba3=) 18.Bd3 (18.Ba3 Ra8 19.Qc1 Nc8=) 18...Nc4 (18...Ra8 19.Ra8 Na8 20.c4=) 19.Bc4 (worse is 19.Nc4 dc4 20.Be2 Be4+=) 19...dc4 20.Nc4 (20.e4 Bf4=) 20...Bf3 21.Nd6 Bg2 22.Kg2 (22.Ba3 Bc6 23.c4 Ra8=) 22...Qd6 23.f3 Nd5 24.Bc1 (24.Kg1 Rc8 25.Qe2 Qb6= (25...Nc3? 26.Bc3 Qd8 27.Bb2+–)) 24...Qc7 (24...Qc6 25.c4=) 25.c4 b5 26.c5 f5 27.Qb3 b4 28.Bd2 Qf7 29.Qd3 Rb8 30.h3 b3 31.Rb1 b2 32.Qc2 Qg6 33.Kf2 f4 34.Qg6 fe3 35.Be3 hg6 36.Bd2 Rb3 37.Ke1 Ne7 38.Bf4 Nc6 39.Be5 Rb5 40.f4 g5+= 41.Kd2 gf4–/+ 42.Bf4 Nd4 43.Kc3 Nc6 44.Bd6= Kf7 45.Rb2 Rb2 46.Kb2 Kf6 47.Bg3 e5 48.Kc3 g6 49.Kd3 Kf5 50.Kc4 Ke6 ½–½. Byrne,T – Baer,Werner, TT–13 ETC, 2004.

7.Ba1 c6

8.c4 Qb6 9.Nc3 Nbd7 10.Nf3 Bd6 11.Be2 0–0 12.0–0 Qa5 (12...c5 13.Qb3 dc4 14.Qc4=) 13.d4 dc4 14.Bc4 c5 (14...Rd8 15.Qc2=) 15.dc5+= Bc5 16.Qb3 (16.Qc2 Rd8+=) 16...Be7 (16...Rd8 17.Rd1+=) 17.Rd1 (17.Be6 Nc5 18.Qa2 Qc7 19.Bc8 Rc8+/–) 17...Nc5+= 18.Qb1 (18.Qa2 Qa2 19.Na2 Rd8 20.Rd8 Bd8+=) 18...b6 (18...Rd8 19.Rd8 Qd8 20.Ne2=) 19.Nd4 (19.Ne5 Qa7+=) 19...Qa7 20.Nc6 Qc7 21.Ne7 (21.Ne2 Bd6+=) 21...Qe7= 22.f3 (22.Bb2 Bb7 23.Qc2 Ng4=) 22...Bb7 23.e4 (23.Qb2!?=) 23...Nce4+= 24.Ne4 (24.fe4 Qc5 Theme: Double Attack) 24...Ne4 25.fe4 (25.Qd3 Nc5 26.Qd6 Qh4=) 25...Qc5–/+ 26.Bd4 Qc4 27.Bb6 Be4 28.Qb2 Bd3 (28...e5 29.Rc1 Qd5 30.Bc7–+) 29.Bd4+= Qb5 (29...f6 30.b6 Be4 31.Be3+=) 30.Bg7 Qb2 ½–½. Melich,Jindrich (2160) – Krutina,Miroslav, Tatry op Tatranska Lomnica, 1999.

8.c4 Bc5 9.Nf3 cb5 10.cb5 Nbd7 11.Ne5 0–0 12.Be2 Qa5 13.Bc3 Bb4 14.Qb3? (better is 14.0–0!?=) 14...Bc3–/+ 15.Nc3? (better is 15.Nd7 Bd2! 16.Nd2 Bd7 17.Bd3–+) 15...Ne5–+ 16.0–0 Bd7 17.Rb1 Ra8 18.g3 Qa3 19.Qd1 Nc4 20.Rb3 Qa1 21.Rb1 Qa5 22.Bc4 dc4 23.Qe2 Rc8 24.d3 (24.Qf3 b6 25.Qf4–+) 24...cd3 25.Qd3 Qc3 (26.Qc3 Rc3–+) 0–1. valpa – Mosselman, HCL–C1956 playchess.de, 2003.

8.d4 Nbd7 9.Bd3 Qa5 10.Bc3 Bb4 (10...Qb6 11.bc6 bc6 12.Nf3=) 11.Bb4 Qb4 12.c3 Qa5 13.bc6 bc6 14.Ne2 0–0 15.0–0 Ba6 16.Ba6 Qa6 17.Nd2 Rb8 18.c4 Rb2 19.cd5 Nd5 (19...cd5 20.Nf4=+) 20.Ng3 Qb5 (20...c5 21.Nde4 cd4 22.Qd4=) 21.Nde4= N7f6 22.Qa1 Qb8 23.Qc1 Ne4 24.Ne4 Ne7 25.Qc5 Qb4 26.Qb4 Rb4 27.Ng3 (27.Ra1!? f6 28.Nd6+=) 27...f5 28.Ne2 Kf7 29.Rc1 g5 30.g3 Ke8 31.Kg2 Kd7 32.Ra1 Rb8 33.Nc1 Kd6 34.Nd3 g4 35.Nc5 Nd5 36.Ra7 Nc7 37.Rb7 Rb7=+ 38.Nb7 Kd5 39.f3 h5 40.Nd8 Ne8 41.Kf2 Ng7 42.Ke2 c5 43.dc5 Kc5 44.Nf7 Kd5 45.f4 Ne8 46.Ng5 (46.Ne5 Nd6=) ½–½. Wartig,Wolfgang – Seifert,J, corr SOK–89–48, 1989.

8.Be2 Nbd7 9.f4 Bd6 10.Nf3 0–0 11.0–0 c5 12.c4 Qc7 13.Nc3 b6 14.cd5 ed5 15.d4 Bb7 16.Ne5 Ra8 (worse is 16...Be5 17.de5 Ne5 18.fe5 Qe5 19.Qc1+=) 17.Bb2 Nf8 (worse is 17...Be5 18.de5 Ne5 19.fe5 Qe5 20.Qd3+/–) 18.Qd2 (18.dc5 Bc5 19.Qd3 Ne6+=) 18...Ne6 19.Rc1 Qe7 20.Kh1 c4 (20...Re8 21.Bf3+=) 21.Bf3 (21.e4 Ne4 22.Ne4 de4 23.Bc4 Qf6=) 21...Bb4 22.Qd1 (22.Qe2 Ra5+=) 22...Ra5–/+ 23.h3 (23.Rb1 Nc7–/+) 23...Nc7 (23...Bc3 24.Bc3 Rb5 25.Qa4–/+) 24.e4 (24.Nc4 dc4 25.Bb7 Qe3+=) 24...de4 (24...Ne4 25.Be4 de4 26.Nc4 Bc3 27.Rc3 Rb5 28.Ba3=) 25.Be2+= Bc3 (25...Nfd5 26.Nd5 Nd5 27.Bc4=) 26.Bc3 Ra8 27.Bc4 Bd5 28.Bf1 Be6 29.Nc6 Qd7 30.g4 Bd5 31.Ne5 Qd6 32.Bb4 Qb4–/+ 33.Rc7 e3 34.Kg1 g6 35.Rc2 Be4 36.Re2 Nd5–+ 37.Qc1 Qd4 38.Qc4 Qc4 39.Nc4 Ra1 40.Ne3 Bd3 41.Kf2 Ne3 42.Re3 Rf1 43.Kg3 Bb5 44.Rb3 Be2 45.Rb2 Bd1 46.Rb6 Rf3 47.Kh2 Rf4 48.Rd6 Bb3 49.Rd3 Rb4 50.Kg2 Be6 51.Rc3 Rb2 52.Kg3 Rb3 53.Rb3 Bb3 0–1. Degterev,Pavel (2545) – Bozyavkin,Anatoly (2360), 7. Ukrainian CCF Cup, 2008.

8.Nf3 g6 9.c4 (9.Be2 cb5 10.Be5 Nc6=) 9...Bg7 10.Be2 (10.Be5 Nbd7=) 10...0–0 11.0–0 Bd7 (11...dc4 12.bc6 b5 13.d3 cd3 14.Qd3 Qd3 15.Bd3 Nc6 16.Bb5=) 12.Qa4 (12.cd5 ed5 13.bc6 Nc6+=) 12...Ne4 (12...dc4!? 13.Bc4 cb5 14.Bb5 Bb5 15.Qb5 Qd7=) 13.Bg7+/– Kg7 14.d3 Nd6 15.Nc3 Qb6 16.Ne5 (16.Rb1 dc4 17.dc4 Rd8+=) 16...Nf5 (16...f6 17.bc6 Bc6 18.Qa3+=) 17.d4 f6 (17...c5 18.Nd3 cd4 19.c5+/–) 18.c5 (18.Nd7 Nd7 19.c5 Qc7+/–) 18...Qd8 19.Nd7 Nd7? (better is 19...Qd7!? 20.Ra1 e5+/–) 20.bc6+– bc6 21.Qc6 Re8 22.Ra1 Nb8 23.Qb5 Re7 (23...Nd7 24.c6 Nf8 25.c7+–) 24.Ra8 Re8 25.Qb7 Kg8 (25...Kh6 26.Bd3 Qc8 27.Qa7+–) 26.Bb5 Rf8 (26...Qc8 27.Qc8 Rc8+–) 27.Ra7 (27...Nd7 28.Bd7+–) 1–0. Zwerenz – Bosma, GER, 1991.

8.f4 cb5 9.Bb5 Nc6 10.Nf3 Qa5 11.Nc3 Bc5 12.0–0 0–0 13.Qe2 d4 (better is 13...Bd7!?+=) 14.Na4+/– Ba7 15.Nd4 Nd4 16.Bd4 (16.ed4?! Bd7 17.Bd7 Nd7=) 16...Bd4 17.ed4 Rd8 18.Nc5 Qa2 19.c3 b6 20.Bc4 Qa8 21.Nd3 Ne4 22.Ne5 Nd6 23.Qh5 Bb7 24.f5 Bg2 25.fe6 Bf1 26.ef7 (26.Kf1?! Nc4 27.Qf7 Kh8=) 26...Kf8 27.Bf1 (27.Kf1?! Nc4 28.Nc4 Qe4=) 27...Qe4 28.h3 h6 29.Qd1 Qf5 30.Qb3 Nf7 31.Qb4 Nd6 32.Qb6 Qg5 33.Kh1 Ne4 (better is 33...Kg8!?+/–) 34.Bc4+– Rd6 35.Qb8 Qd8 36.Ng6! Ke8 37.Qb7 (37...Nf2 38.Kh2+–) 1–0. pierre – samigodel, internet, 2006.

8.f4 Nbd7 9.Nf3 Bd6 10.Be2 0–0 11.0–0 Re8 12.bc6 (12.Be5 A) 12...Ne5? 13.fe5 (13.Ne5?! Qc7=+) 13...c5 14.c4+–; B) 12...Qc7 13.d4 B1) 13...Ne5? 14.fe5 (14.de5?! Bc5 15.ef6 Qf4+/–; < 14.Ne5 c5=+) 14...Be7 15.ef6 Bf6 16.bc6+–; B2) 13...Ne4=) 12...bc6 13.Be5 Qc7 (13...Ne5? 14.fe5 (14.Ne5?! Qc7=+) 14...Be7 15.ef6 Bf6 16.d4+–) 14.d4 c5 (14...Ne4 15.Nfd2=) 15.Nc3 (15.Na3 Qb6= (15...Ne5? 16.fe5 Bd7 17.ed6 Qd6 18.Nb1+–)) 15...c4?? (better is 15...Qb6=) 16.Nb5 +–. pcmvr (2225) – rhand (2140), net–chess.com, 2006.

8.f4 Be7 9.Nf3 0–0 (9...Bd7 10.Nc3=) 10.c4 (10.Nc3 c5=) 10...c5 (10...b6 11.bc6 Nc6 12.Bf6 Bf6 13.d4=+) 11.Be2= dc4 12.Bc4 Nbd7 13.Nc3 (13.Qc2 Nd5=) 13...b6 (13...Bd6 14.d4=) 14.0–0= ½–½. Mroz,Antoni – Lesiak,A, corr Poland, 1985.

8.c4 Qa5

9.Nc3 Bb4 10.Nf3 0–0 11.Be2 dc4 12.Bc4 Nd5 13.bc6 (13.0–0 Nc3 14.dc3 Bc3 15.Bc3 Qc3+=) 13...Nc3 14.dc3 Bc3 15.Bc3 (15.Ke2!?+=) 15...Qc3–/+ 16.Nd2 bc6 17.0–0 Rd8 18.Qb3 Qd2 19.Ra1?? (better is 19.Qb8 Ba6 20.Qb3 Bc4 21.Qc4–/+) 19...Na6! 20.g3 (20.Ra6 Qd1 Double attack; 20.Ba6 Ba6 Combination) 20...Nc5 21.Qb1 Qc3 22.Be2 g6 23.Ra8 Qf6 (23...Kg7 24.Bf3–+) 24.Qb6 (24.Qb4 Qe5–+) 24...Ne4 25.f4 e5 (25...Kg7 26.Qb4 Nc3 27.Bf3–+) 26.Ba6 (26.Qc7 Kg7 27.Rc8 Rd2–+) 26...ef4 27.ef4 (27.Qd8 Qd8 28.Rc8 Qc8 29.Bc8 fe3 30.Kf1–+) 27...Kg7 (better is 27...Rd1 28.Bf1 Kg7 29.Rc8–+) 28.Rc8 (28.Bc8 Rd1 29.Kg2 Rd2 30.Kf1 Qc3 31.Qb2 Qb2 32.Bg4 Rd1 33.Bd1 Qf2) 28...Qa1 29.Kg2 (29.Bf1 Rd1 30.Rg8 Kg8 31.Qb8 Kg7 32.Qe5 Qe5 33.fe5–+) 29...Rd2 30.Kh3 Nf2 0–1. Valpa – Magicpaul, playchess.de, 2002.

9.Nc3 Bb4 10.Nf3 0–0 11.Be2 dc4 12.bc6 bc6 13.0–0 Ba6 14.Qc2 Nbd7 15.Ne4 The isolani on c4 becomes a target 15...Ne4 16.Qe4 Qd5 (worse is 16...Bd2 17.Qd4 c3 18.Ba6+–) 17.Qg4 f6 18.Rc1 Increasing the pressure on the isolated pawn on c4 18...Ra8 19.Bc3 Bc3 20.dc3 Nc5 21.Nd4 f5 22.Qh4 Re8 23.Bh5 g6 24.Bf3 Ne4 (24...Qd8!? 25.Qg3 Qb8=) 25.Ra1 Bb7 26.Be4 fe4 27.h3 e5 28.Ne2 Qd2 (28...Rf8 29.Ng3=) 29.Ng3 Qc3 (better is 29...c5=) 30.Rd1+– Bc8 31.Rd8 (31.Rd8 Rd8 32.Qd8 Kf7 33.Qc7 Kf8 34.Qc8 Kg7 35.Ne4+–; 31.Ne4 Qc2 32.Rd8 Rd8 33.Qd8 Kf7 34.Qc7 Kf8 35.Qc8 Kg7 36.Qc7 Kh6+–) 1–0. Mittelbachert,Ulrich (1905) – Marzioch,Wilfried (1920), Ruhrgebiet VL2, 2004.

9.Nc3 Bd7 10.bc6 Nc6 11.cd5 ed5 12.Nf3 Nb4 13.Bb2 Bd6 14.Be2 0–0 15.0–0 Ne4 16.Nd4 Rc8 17.f3 Nc5 18.Ncb5 Bf8 19.Bc3 Na4 20.Qb3 Nc3 (20...Bb5 21.Bb5 Nc3 22.dc3=) 21.Nc3 (better is 21.dc3!? Nc6 22.Qd5 Nd4 23.cd4=) 21...Ra8 22.f4 Bc6 23.f5 Qc7 24.Qb1 Qe5 ½–½. Taus,Martin (2130) – Meissner,Ruediger (2105), ZH–2011–0–00549, 2011.

9.Nc3 Nbd7 10.Nf3 Bd6 11.Be2 0–0 12.0–0 Nb6 13.cd5 cd5 14.Qb3 Bd7 15.Rb1 Rc8 16.h3 Nc4 17.Bb2 Bb8 18.Bc4 dc4 19.Qa3 Qc7 20.Kf1 Qb6 21.Ba1 e5 22.Ke1 Bf5 0–1. Melich,Jindrich (2140) – Karnik,Pavel (2335), Tatry op Tatranska Lomnica, 1998.

9.Nc3 Be7 10.Nf3 Nbd7 11.Be2 0–0 12.0–0 (12.cd5 cd5 13.0–0 e5=) 12...dc4 13.Bc4 cb5 (13...Nb6 14.Be2=) 14.Nb5 Nc5 (14...Qd8 15.d3=) 15.d3 (15.Bf6 Bf6 16.d4 Bd7+=) 15...Bd7 (15...Nd5 16.Be5=) 16.Bc3 Qb6 (16...Qa6 17.Qb1+=) 17.Qb1 Bc6 (17...Ra8 18.Ne5+=) 18.Rc1 (18.Nbd4 Qb1 19.Rb1 Ba4+=) 18...Bb5 (18...Bf3 19.gf3 Rc8 20.Bf6 Bf6 21.d4=) 19.Bb5+= Rd8 (19...Nd5 20.Bd4+=) 20.Bd4 Rd5 21.Ne5+/– Bd6? 22.f4 Be5 23.fe5+– Ng4? 24.Qb4 Nd3 25.Rc8 Rd8 26.Bb6 Rc8 27.Bd3 Rc1 28.Bf1 (28...h5 29.Qe7+–) 1–0. mrkt – nepos, kurnik, 2007.

9.Bf6 gf6 10.cd5 cd5 11.Qb3 Bb4 12.Nf3 Nd7 13.Be2 Nc5 14.Qb2 ½–½. Spiegel,Matthias – Moschell,Hans (1920), 2. Landesliga Ost, 2001.

9.Bf6 gf6 10.cd5 cd5 11.Nc3 Bd6 =.

9.Bf6 gf6 10.cd5 cd5 11.Nf3 Nd7 12.Qc2 Nb6 13.Bd3 (13.Qc7 Qb4 14.Nc3 Qd6 15.Qd6 Bd6=) 13...Bd6 (13...e5 14.Be2=) 14.Nd4 (14.0–0 Bd7=) 14...Ke7 (14...e5 15.Nb3 Qb4 16.Nc3=+ (16.Bh7? Qg4–+)) 15.0–0 (15.Nc3 Qa1 16.Nd1 Qa4=) 15...h5 (15...e5 16.Nb3 Qb4 17.f4=) 16.f4 (16.Nc3 Rg8+=) 16...Bd7 (16...e5 17.Nb3 Qb4 18.Nc3=) 17.Nc3+= Rc8 18.Be2 h4 (better is 18...Bc5 19.Qd3 Nc4=) 19.Qa2 (better is 19.Qh7!?+=) 19...Qa2–/+ 20.Na2 e5 21.fe5 fe5 22.Nf3 Rc2 23.Nc3 d4 24.Bd3 Rb2 25.ed4= ed4 26.Re1 Kf8 27.Ne4 Be7 28.Nd4+= Kg7 29.Kf1 Nd5 30.Bc4 Nf6 31.d3 h3+= 32.Re2 Rb1 33.Kf2 Ne4 34.Re4 Bc5 35.gh3+= Bh3 36.Kf3+/– f5 37.Ne6 Kf6 38.Nc5 fe4 39.Ne4 Ke5 40.Ke3 b6 41.Nf2 Bg2 42.h4 Kf5 43.Ne4 Be4= 44.de4 Ke5 45.h5 Rh1 46.Bf7 Rh3 47.Kf2 Ke4 48.Kg2 Ra3 49.h6 Ra8 50.h7 Rh8 51.Bg8 Kd4 52.Kg3 Kc5 53.Kg4 Kb5 54.Kg5 Kc5 55.Kg6 b5 56.Kg7 Rh7 57.Kh7 ½–½. Jaworski,Jan – Huebener,Joachim, corr ICCF EU–H–GT–8, 1980.

9.Bf6 gf6 10.cd5 cd5 11.Nf3 e5 12.Be2 =.

8.c4 Bb4

9.Qb3 c5 10.Nf3 0–0 11.Be2 Nbd7 12.0–0 dc4 13.Qc4 b6 14.Rd1 Bb7 15.Nc3 Qc7 16.Qh4 Ra8 17.Ng5 Bc3 18.Bc3 h6 19.Nf3 Ne4 20.Qe7 Qd6 21.Qd6 Nd6 22.Ra1 (22.Ne5 Nf8=) ½–½. Brinks,Jan Willem – Ten Napel,Johan, NED–ch U20 op, 2000.

9.Qb3 Bd6 10.Nf3 =.

9.Nf3 0–0 10.Qa4 Qa5 11.Qa5 Ba5 12.Bc3 b6 13.Ba5 ba5 14.Nc3 cb5 15.cb5 Nbd7 16.d4 Nb6 17.Bd3 Bd7 (17...Bb7+=) 18.Ke2 (18.Ne5 Rc8 19.Kd2 Be8+/–) 18...Ra8? (better is 18...Rc8!? 19.Kd2 Ne4 20.Ne4 de4 21.Be4 Nc4 22.Ke2 Bb5=) 19.Ra1+/– h6 20.Na4 (better is 20.Ne5!?+/–) 20...Na4= 21.Ra4 Ne4 22.Ra3 f6 23.Nd2 Nd6 Exerts pressure on the isolated pawn 24.Nb3 The isolani on a5 becomes a target 24...Bb5 25.Ra5 (25.Na5?? Bd3 26.Kd3 Nc4–+) 25...Ra5 26.Na5 Be8 27.g4 h5 28.h3 g5 29.f4 gf4 30.ef4 Kg7 31.Nb3 ½–½. TuGGy – Harzakc, playchess.de, 2005.

8.c4 cb5

9.cb5 Qa5 10.Nc3 Bb4 11.Qc2 Bd7 (better is 11...Qa1 12.Nd1 0–0–+) 12.Bb2 0–0 13.Nf3 e5 (13...Rc8 14.Qd3=+) 14.Be2 (14.Ne5 Be6+/–) 14...d4 15.Ne4 (15.ed4 e4 16.Ne5 Qc7+=) 15...Ne4 16.Qe4 Bb5 17.Bb5?? (better is 17.Qe5 Be2 18.Qd4+= (< 18.Ke2 Qa6 19.Kd1 Nc6–/+)) 17...Qb5–+ 18.ed4 Nc6 (better is 18...ed4!? 19.Nd4 Bd2 20.Kd2 Qb2 21.Ke3 Qc3 22.Kf4 Nd7–+) 19.de5 Rd8 20.Bc3?? (better is 20.Qc2=) 20...Bc3–+ 21.dc3 Ne5 22.Nd4?? (22.Qe5 Qb1) 22...Nd3?? (22...Qa6 23.g4–+) 23.Kd2?? (better is 23.Ke2 Nc1 24.Kf3=) 23...Qb2?? (23...Nf2 24.Ke3 Qb2–+) 24.Ke3?? (better is 24.Kd3 Rc8 25.Ne2+–) 24...Nc5 (better is 24...Qc3 25.Nb5 Qb2–+) 25.Qc2–/+ Re8 26.Kf3 Qa3 27.Rd1 Qa6 28.c4 Qf6 29.Qf5 Qe7 30.Rd2 g6 31.Qf4 –/+. GULP – sriINDIA, Live Game Caissa's Web, 2004.

9.cb5 Bd6 10.Nf3 Nbd7 11.Be2 0–0 12.0–0 Qc7 13.d4 (13.Qc1 Qb8=) 13...Ne4 (13...Nb6 14.Qc1=) 14.Qc1 Qc1 (14...Qb8 15.Nbd2=) 15.Rc1 f6 (15...Nb6 16.Ne5=) 16.Nbd2 (16.Nc3 Nc3 17.Bc3 e5+=) 16...Nd2= 17.Nd2 Nb6 18.Nb3 Nd7 (18...e5 19.Nc5=) 19.Nc5 (19.Bd3 g6+=) 19...Kf7= 20.Bb2 b6 21.Nb3 Bb7 22.h3 (22.Ra1 Ra8=) 22...Rc8 (22...Ra8 23.Bd3=) ½–½. Grund,Karl – Champion,William, corr USA–BRD, 1977.

9.cd5 Nd5 10.Bb5 Nc6 11.Nf3 Bd7 (11...Qa5 12.Nc3=) 12.Nc3 Nc3 (12...Nf6 13.d4=) 13.Bc3 f6 (13...Nb4 14.Bb4 Bb5 15.Bf8 Rf8 16.Nd4=) 14.0–0+= Be7 (14...Bd6 15.Qb3+=) 15.Qb3 (15.Bc4 Qb6+=) 15...0–0 (15...Qb6 16.Rb1+=) 16.d4 (16.Bc4 Qc8+/–) 16...Kh8 (16...Qb6 17.Rb1 Rd8 18.d5 ed5 19.Qd5 Kh8 20.Bd3+/–) 17.d5 (17.Bc4!?+/–) 17...ed5+= 18.Qd5 Bg4 (18...Be8 19.Qd8 Nd8 20.Bd3+=) 19.Bc6+/– bc6 20.Qc6 Qc8 (20...Qd3 21.Bd4+=) 21.Nd4+/– Bd7 22.Qe4 Re8 23.Qd3 Bc5 24.Ne2 Bf5 25.Qd2 Rd8 26.Bd4 Bd4 27.Nd4+/– Bg6 28.Rc1 Qa8 29.Qc3 h6 30.Ra1 Qb7 31.Rc1 Rb8 32.h3 Qe4 33.f3 Qe8 34.Kh2 Qe5 35.Kg1 Rb1 36.Rb1+/– Bb1 37.Kf2 Bg6 38.Ne2 Qc3 39.Nc3 Bf7 40.e4 g5 41.g3 Kg7 42.Ke3 Kg6 43.f4 gf4 44.gf4 Bc4 45.Nd5 Bf1 46.h4 Kf7 47.Kd4 Ke6 48.Ne3 Be2 49.Nf5 h5 50.Ke3 Bg4 51.Ng3 f5? 52.ef5 Bf5?? 53.Nh5 Kf7 54.Ng3 Bb1 55.Kf3 Kf6 56.Kg4 Ba2 57.f5 Bb3 58.Nh5 Ke5 59.Kg5 Bf7 60.Ng7 Bg8 61.h5 Bf7 62.h6 Bg8 63.Kg6 Kd6 64.Nh5 Ke7 65.Kg7 (65...Bb3 66.f6 Kd6 67.h7+–) 1–0. Timmer,Hendrika – Loeffler,Louise Jeanne, WchWT Lublin, 1969.

9.cd5 Nd5 10.Bb5 Bd7 11.Bd7 Nd7 12.Nf3 =.

9.Bf6 Qf6 10.cd5 ed5 =.

9.cb5 Nbd7

10.Nf3 Bd6 11.Nc3 0–0 12.Be2 Nb6 13.Na4 Bd7 (13...Na4 (idea Bd7)) 14.Nb6 Qb6 15.Bf6 gf6 16.Qa4 Rc8 17.0–0 e5 18.Qh4 Qd8 19.Qh5 Be6 20.Nh4 e4 21.Bg4 Qd7 22.Bf5 Bf5 23.Nf5 Bf8 24.f3 Rc2 25.fe4 de4 26.Qg4 Kh8 27.Qh4 Qd8 28.Qe4 Qd2 29.Qb7 Rc1 30.Qf3 Rf1 31.Qf1 Bc5 32.Kh1 Kg8 33.h4 Bd6 34.g3 Qd5 35.Kh2 Bf8 36.Nd4 Kg7 37.Qg2 Qe5 38.Qf3 Bc5 39.Nf5 Kg8 40.Kh3 Qe6 41.h5 h6 42.g4 Bf8 43.Qc6 Qe5 44.b6 Qa1 45.Ng3 Qe5 46.Qc8 Kg7 47.Nf5 Kh7 48.Qc7 Qd5 49.e4 Qb3 50.Ng3 1–0. Sokolski – Maseyev, corr SU.

10.Nf3 Bd6 11.Nc3 e5 12.Qb3 Nc5 13.Qa2 Be6 14.d4.

10.Nf3 Bd6 11.d4! Ne4 12.Bd3 Qa5 13.Nbd2 Bb4 (13...Nc3? 14.Qc1 Bb4 15.0–0 Nb6 (15...0–0 16.Bc3 Bc3 17.Nb3 Qb4 18.Qc2) 16.Nb3 Qa4 17.Bc3 Qb3 18.Bb4 Qb4 (18...Qd3? 19.Qc5) 19.Qc7 Qa5 20.Ng5!) 14.Ke2 Ndf6 15.Qc2 Bd7 16.Nb3 Qb6 17.Ne5 Nd6 18.Nc5! Bb5 19.Rb1 Qa5 20.Bb5 Nb5 21.Nb7 +/–. Sokolski – Weinblatt, 1949.

10.Nf3 Be7 11.Be2 0–0 12.0–0 Qa5 13.Bc3 (13.Nc3) 13...Qc7 14.Qc2 –+. Adam – Arnold, 1972.

10.f4 Bc5 11.Nf3 =+.

10.f4 Ne4 11.Nf3= Qa5 12.Nc3 Ndf6 13.Qc1 (13.Ne4 de4 14.Bc3 Bb4 15.Bf6 ef3 16.Bg7 Rg8+=) 13...Ba3 14.Bb2 Bb2 15.Qb2 Nc3 16.Qc3 Qc3 17.dc3 Ne4 (17...Ng4 18.Ke2=) 18.c4 dc4 19.Bc4 Nd6 (19...Bd7 20.Ne5+=) 20.Bd3 Bd7 21.Kf2 (better is 21.b6!?+=) 21...Bb5=+ 22.Bb5 Nb5 23.e4 Nc3 24.Ke3 0–0 (24...b5 25.Ra1 0–0 26.Ra7=+) 25.Kd3 (25.Rc1 Nb5=) 25...Na4 26.Rc1 Rd8 27.Ke3 h6 (27...Nb2 28.Rc7=+) 28.Rc7= b6 29.Ne5 Nc5 (29...f6 30.Nc6 Rd1 31.e5=) 30.Rf7 Ra8 (30...Rd1 31.Rc7+=) 31.Rc7+= Ra4 32.Rc8 (32.Nd7!? Ra3 33.Ke2 Ne4 34.Nb6 Nc3 35.Ke1=) 32...Kh7= 33.Kf3 Ne4 (33...Ra3 34.Kg4 Ne4 35.Rb8=+) 34.Rc6 (34.Nd7 Nd6 35.Rc6 Ra3 36.Kg4 Nf5=) 34...Nf6 35.Rb6 (35.Re6!? Ra3 36.Kf2=) 35...Rf4!?=+ 36.Kf4 Nd5 37.Ke4 Nb6 38.Kd4 (38.Nc6 Nc4=+) 38...g6 39.Kc5 Nd5 (39...Nc8 40.h3=+) 40.Kd6= Kg7 41.g3 (< 41.Ke6 Nf4 42.Kd6 Ng2–/+) 41...Kf6 42.Ng4 Kg5 43.h3 Nf6 44.Nf2 (44.Ne5 Ne4 45.Ke6 Ng3=) 44...Nh5–/+ 45.Ne4 Kf5 46.g4 Ke4 47.gh5 gh5 48.Ke6 h4 49.Kd6 ½–½. Myrberg,Johnny (1695) – Aurell,Bo (2260), DM Nordskaane SWE, 1990.

8.c4 dc4

9.Nc3 Qa5 10.Bc4 Bd7 11.Qb1 Qb4 12.Qb4 Bb4 13.Nge2 0–0 14.bc6 bc6 15.0–0 c5 16.Nf4 Nc6 17.Na2 Na5 18.Be2 Ba4?? (better is 18...Nd5 19.Nd5 ed5=) 19.Bf6 gf6 20.Nb4 cb4 21.Ra1 Rc8 22.Ra4 Rc1 23.Bf1 Nc4 24.Ra8 Kg7 25.Rc8 b3 26.Nd3 Rc2 27.g4 (27.Ne1 Rc1 28.Rc4 b2+–) 27...e5 28.e4 Nd2 29.Rc2 bc2 30.Nc1 Nf3 31.Kg2 Nd4 32.f3 Kg6 33.Kg3 h5 34.Bd3 Kg5 35.h4 Kg6 36.f4 hg4 37.Kg4 Kh6 38.f5 Kg7 39.Kg3 Kh6 40.Kg4 Kg7 41.Bc4 1–0. Ettel,Thomas – Sunder,Thomas (2210), Hessenliga, 2006.

9.Bc4 c5 10.Nc3 (10.Nf3 Nbd7=) 10...b6 11.Nf3 Qc7 (11...Bb7 12.0–0=) 12.Na4 (12.0–0 Bb7=) 12...Nbd7 13.d3 (13.Qe2 Bb7=) 13...Bd6+= 14.Qc2 Bb7 15.e4 0–0 16.Qb2 (16.0–0 Ra8+=) 16...Ra8 17.Bb3 (17.Qb3+=) 17...e5 (17...c4 18.dc4 Be4 19.Qc3–/+) 18.Ng5 (better is 18.0–0=) 18...Rf8?? (18...c4!? 19.dc4 Bb4 (19...Ne4?! 20.Ne4 Be4 21.0–0+=) 20.Kf1 Ne4 21.Ne4 Be4–+) 19.Qe2 (better is 19.Qa2 Nb8 20.Bc3+/–) 19...h6+= 20.h4 (20.Nf3+=) 20...Nb8 (20...c4 21.Bc4 Bb4 22.Bc3 Bc3 23.Nc3=) 21.f4 (21.Bc4!?=) 21...Bc8 (21...Nbd7 22.Nf7 Rf7 23.f5–/+) 22.f5 (22.Nf3 Nbd7+=) 22...Bd7–/+ (22...hg5 23.hg5 Nbd7 24.gf6 Nf6 25.g4+–) 23.Nc3 Qa7 (23...hg5 24.hg5 Qa7 25.Bb2 Bf5 26.ef5+–) 24.Bb2 Qa5 Attacking the isolated pawn on b5 (24...Be8 25.Nf3=) 25.Bc4 g6?? (better is 25...Qb4=) 26.Nf7+– Be7 (26...Rf7 27.fg6 Bg4 28.Qd2+–) 27.Ne5 Kg7 28.Ng6 Re8 (28...Bd6 29.Nf8 Be5 30.0–0 Bc3 31.e5 Bb2 32.ef6 Bf6 33.Qh5 Qa4 34.Qg6 Kf8 35.Qf7) 29.Ne7 (better is 29.0–0 Nc6 30.bc6 Bc6 31.Ne7 Re7+–) 29...Re7 (29...Bb5 30.0–0 Bc4 31.e5+–) 30.0–0 Kf8 31.Ra1 (31.Ra1 Qb4 32.Ra4+–) 1–0. Theebusch – Kerber,Wolfram, corr, 1972.

9.Bc4 Bd6 10.Nf3 =+.

9.Bc4 cb5

10.Bb5 Nc6 11.Nf3 Bd6 12.0–0 0–0 13.Bc6 (13.Qe2 Bd7=) 13...bc6 14.Qc2 Bb7 15.Ng5 e5 (15...Bh2 16.Kh1 e5 17.Nf3=) 16.Nc3 (16.f4!? Re8 17.Nf7 Kf7 18.fe5 Be5 19.Be5 Re5 20.Qb3 Re6 21.Qb7 Kg8 22.Qb3+/–) 16...h6 (16...Ba6 17.Rd1=) 17.Nge4 Ne4 (17...c5 18.Rb1 Bc6 19.d3=) 18.Ne4 Qc7 (18...c5 19.Nc5 Qc7 20.Rc1=) 19.Nc5 (19.f4!?+/–) 19...Bc8 (19...Rb8 20.h3=) 20.Rc1 Re8 (20...Rd8=) 21.d4 (better is 21.Ne4!?=) 21...ed4=+ 22.ed4? (22…Bh2 23.Kf1–+; better is 22.Bd4!? Bh2 23.Kh1=+). Hallam,John – Mouzon,J, US op Alexandria, 1996.

10.Bb5 Bd7

11.Qa4 Bb5 12.Qb5 Qd7 13.Qb3 +=.

11.Qa4 Bb5 12.Qb5 Qd7 13.Qe2 +=.

11.Qa4 Nc6 12.Nc3 (12.Bf6 gf6 13.Nf3 Qa5=) 12...Be7 (12...Nb4 13.Nf3 Bb5 14.Qb5 Qd7 15.Ke2=) 13.Nf3= 0–0 14.0–0 Qa8 15.Bb2 (15.Qf4 Qb8=) 15...Qa4 16.Na4 (16.Ba4 Ra8=) 16...Ne4 (16...Ne5! 17.Ne5 Bb5+=) 17.Nb6= Be8 18.Ra1 (18.Rc1 Bd8 19.Nc4 Be7+=) 18...Bc5 19.Na4 (19.Nc4 Nb4 20.Be8 Re8=) 19...Bb4 Attacking the backward pawn on d2 (19...Be7 20.Nc3 Nd6 21.Be2+=) 20.Ba3 (20.d4 Na5 21.Bd3 Nb3+=) 20...Ba3= 21.Ra3 Nd6 (21...Ne7 22.Be8 Re8 23.Nb6=) 22.Be2+= f6 23.Nc5 (23.d4 Bg6 24.Nc5 e5+=) 23...Kf7 (23...Bf7 24.d4=) 24.Rb3 (24.d4 Ke7+=) 24...Na5 25.Rb4 (25.Rb6 Nc8 26.Rb4 b6=) 25...Bc6= 26.Nd4 Bd5 27.Nb5 Nb5 28.Rb5 Ra8 29.Bf3 Nc4+= Threatening mate: Ra1 30.Nb3 Nd6–/+ 31.Ra5 Ra5 32.Na5 Bf3 33.gf3 b6 34.Nb3+= Nc4 35.Kf1 Kg6 36.d3 Ne5 37.Ke2= Nc6 38.d4 Kg5 39.e4 Kf4+= 40.d5 ed5–+ 41.ed5 Nb4 42.d6 Ke5 43.d7 Nc6 44.Nd2 Kd6 45.Nc4 Kc7 46.Kd2 b5 47.Na3 b4 (47...b4 48.Nb5 Kd7–+; 47...Kd7?! 48.Nb5 Ne5 49.Nd4+=) 0–1. Buczinski,Henryk – Kudryk, Katowice Poland, 1977.

11.Qa4 Be7 12.Nf3 (12.Bf6 Bf6 13.d4 Bb5 14.Qb5 Qd7=) 12...Bb5 (12...0–0 13.Bf6 Bf6 14.d4=) 13.Qb5 Qd7 14.Qb3 Nc6 (14...0–0 15.Bf6 Bf6 16.0–0=) 15.0–0 0–0 16.Ne5 (16.Bf6 Bf6 17.d4 Rb8=) 16...Ne5 17.Be5 Rc8 18.d4 (18.Bf6 Bf6 19.d4 Qd5=) 18...Qc6 (18...Ng4 19.Bf4=) 19.Nd2 (19.Bf6 Bf6 20.Nd2 b5=) 19...b5 (19...Nd7 20.Nf3=) 20.Rb1 (20.Bf6 Bf6 21.Rb1 Rb8=) 20...b4 (20...Qc2 21.Qc2 Rc2 22.Bf6 gf6 23.Nb3=) 21.Bf6 gf6 22.h3 (22.Qd1 Qc2=) 22...Bd6 (22...f5 23.Qd1=) 23.Qb2 (23.Qd1 Qc2=) 23…Qc3 (23...f5 24.g3=) ½–½. Kreuzer,Uwe – Holzhauer, Verbandsliga Nordbad, 1983.

11.Qb3 Be7 12.Nf3 0–0 13.0–0 Ne4 14.Nc3 Nc5 15.Qc4 Bb5 16.Nb5 Nc6 17.Qc3 Qa8 18.Qg7# 1–0. Hugi – Nautiluschess, ICS blitz, 2000.

11.Be2 Qa5 12.Bc3 (12.Bf6 gf6 13.Nf3 Ba4=) 12...Bb4 (12...Qg5 13.Bf3=) 13.Nf3 Bc3 (13...0–0 14.Bf6 gf6 15.0–0=) 14.Nc3 (14.dc3 0–0=) 14...Nc6 (14...0–0 15.Qb1=) 15.Nb5 (15.Qb1 Qc7=) 15...0–0= 16.0–0 Ne7 (16...Nb4 17.Nc3=) 17.Nd6 (17.Qb3 Bb5 18.Bb5 Rc8+=) 17...Bc6 (17...Qb4 18.Nc4 Bc6=) 18.Nd4 (18.Qb1 Qd8 19.Nb7 Qc7=) 18...Qd5 (18...Bg2!? 19.Kg2 Qd5 20.Bf3 Qd6 21.Bb7 e5=+) 19.N6b5?? (better is 19.Nc6 Qc6 20.Nb5=) 19…Qg2# 0–1. OutOfBounce – kingofthehill, Live Game Caissa's Web, 2005.

11.Be2 Bd6 12.Nf3 =+.

11.Bf6 Qf6 12.Bd7 Kd7 13.Qb3 Kc8 14.Nf3 +/–.

11.Bf6 Qf6 12.Bd7 Kd7 13.Qb3 Ke8 14.Qb7 +=.

11.Bf6 Qf6 12.Bd7 Nd7 =.

8.c4 Bd6

9.Nf3 0–0

10.Qb3 Nbd7 11.Nc3 Nc5 12.Qa2 e5 (12...Nce4 13.Qc2=+) 13.cd5 (13.bc6 bc6 14.cd5 cd5=+) 13...cd5=+ 14.Be2 (14.d4 ed4 15.Nd4 Nce4 16.Ne4 de4=+) 14...e4 15.Nd4 Be5 16.Nb1 (16.Nd1 Bg4 17.f3 Bh5=+) 16...Ng4 (16...Bg4 17.f3 Qc7 18.Bc3 Bd4 19.fg4 Bc3 20.Nc3=+) 17.Qc2 (17.h3 Nh6=+) 17...Qd6 (17...Bd6 18.Nc3=+) 18.Bb2 (18.h3 Nh6=) 18...Bd7 19.f4 ef3 20.Nf3 Bg3 (20...Bh2 21.Ne5 Ne5 22.Be5 Qe5 23.Qc5–+) 21.Kf1 Ne4 (21...Rc8 A) 22.hg3?? Ne4 23.Be5 Ne5–+ (< 23...Rc2 24.Bd6 Rc1 25.Ne1–+); B) 22.Ba3 Qh6 23.Bc5–/+) 22.Ba3 Qb6?? (22...Qg6 23.Nc3 Rc8–+) 23.hg3?? (better is 23.Bf8 Kf8 24.hg3 Ng3 25.Ke1=) 23...Rc8–+ 24.Qd3 Ng3 25.Ke1 Nh1 26.Qd5 Be6 27.Qd4 Qc7 28.Qf4 Qf4 29.ef4 Re8 30.Nc3 Ng3 (Black gets in control) 31.Nd4 Bc4 32.Bd6 Ne2 33.Nde2 Re6 34.Bc7 Rh6 35.d4 Rh2 36.g3 Nf6 37.b6?? Ne4! 38.Kd1 Be2 39.Ne2 Rg2 40.d5 Kf8 41.f5 Rf2 42.Bf4 Rf3 43.Kc2 Ke7 44.Nd4 Rc3 45.Kb2 Rc5 46.Kb3 Rd5 47.Kc4 Rd7 48.g4 Nf6 49.Nc6 bc6 50.Kc5 Nd5 51.Bg3 Nb6 (52.Kb6 Rd3–+) 0–1. Jacobi,KH – Littke,H, corr, 1975.

10.Qb3 Nbd7 11.Nc3 Re8 12.d4 =+.

10.Qc2 =+.

10.Be2 cb5 11.cb5 Nbd7 12.d4 =.

10.Be2 dc4 11.Bc4 cb5 12.Bb5 Bd7 13.Bd7 Nbd7 14.0–0 b5 15.d4 Qa8 16.Nbd2 Rb8 17.Qb1 Nd5 18.Nb3 b4 19.Rc1 Rc8 20.Rc8 Qc8 21.Ng5 Bf8?? (Better is 21...N5f6=) 22.Qh7 1–0. Sternik,Ryszard – Babiak,J, Olsztyn, 1994.

10.Be2 Nbd7 11.0–0 cb5 12.cb5 e5 13.Qc2 =.

10.Be2 Nbd7 11.0–0 e5 12.c5 Bc5 13.Be5 Ne5 14.Ne5 Bd6 =+.

10.Be2 Nbd7 11.0–0 e5 12.c5 Nc5 13.Be5 Bg4 14.Bd6 Qd6 =.

10.Be2 Nbd7 11.0–0 e5 12.d3 Re8 13.Nc3 dc4 14.dc4 Nc5 15.h3 (15.Na4 e4 16.Nd4 Na4 17.Qa4 c5=) 15...Qe7 16.Na4 Nfe4 17.Nc5 Nc5 18.Qb1 (18.Qd2 Rd8=+) 18...e4 19.Qb2 f6 20.Nd2 Bc7 (20...Rd8 21.Qc2=+) 21.Rd1= Rd8 22.Qa3 (22.b6 Bd6=) 22...b6 (22...Qd6 23.g3 Bb6 24.Qb4=) 23.Bd4= Bd6 (23...Bf5 24.bc6 Qd6 25.Nf1 Qc6 26.Nd2=+) 24.Qb2 (24.bc6 Qc7+=) 24...Bc7 25.Nf1 (25.Bc5 Qc5 26.Ne4 Rd1 27.Bd1 Qe7+/– (27...Qc4?? 28.Bb3 cb5 29.Qc3+–)) 25...Bb7 (25...cb5 26.Qb5 Bd7 27.Bc5 bc5 28.Qb7=) 26.Ra1 (26.Bc5 Qc5 27.Rd8 Bd8=) 26...Ra8 (26...cb5!? 27.Qb5 Bc8=) 27.Ra8+= Ba8 28.Qa1 (28…Bb7 29.Qa7+=). Farleigh,Richard (2200) – Lux,J, World op Philadelphia, 1995.

10.Be2 Nbd7 11.0–0 e5 12.d4 e4=+ 13.Ne5 cb5 14.cd5 Qa5 15.Nd2 b4 (15...Nb6!?=) 16.Qb1+= Rd8 (16...Re8 17.Ne4 Ne4 18.Qe4+/–) 17.Nec4 (17.Nd7 Rd7 18.Ne4 Nd5+–) 17...Qc7 18.Nd6 Qd6 19.Ne4 Ne4 20.Qe4 Nf6 21.Qb1 Nd5 22.Bf3 Be6 23.Rc1 b5 (23...Qe7 24.e4 Nc3 25.Bc3 bc3 26.d5+/– (26.Rc3?! Rd4 27.e5 Rd2=)) 24.Be4 (24.e4 Nc3 25.Bc3 bc3+/–) 24...h5 (24...Nf6 25.Bd3+=) 25.Bd3 Rb8 (25...h4 26.Bb2+/–) 26.Rc5 h4 27.h3 Qa6 28.Bb2 b3 29.Be4 Nf6 30.Bd3 Bc4 31.f3 Bd3 32.Qd3+/– Qa2 33.Qc3 Qb1+= 34.Kf2 Qd1 35.Rc8 Rc8+= 36.Qc8 Kh7 37.Qf5 Kh8 38.Qb5 Qc2 39.Qe2 Qc7 40.Qd3 Qb8 41.e4 Nh5+/– 42.e5 Qb4 43.Ke3 Qe1= 44.Qe2 Qg1 45.Qf2 Qf2 46.Kf2 Nf4 47.Ke3 Ng2 48.Ke4 Kg8 49.Ba3 g6 50.d5 Ne1? 51.d6+– b2 52.Bb2 Kf8 53.Bc3 Ng2 54.f4 (54...Nf4 55.Kf4+–) 1–0. Lehr,Thomas – Seipel,Juergen, Schleswig Holstein–chF, 1989.

10.Be2 Re8 ½–½. Schatz,Hans Ulrich – Frank,Wolfgang (2185), Baunatal, 1998.

9.Nf3 Nbd7

10.Nc3 0–0 11.Be2 Nb6 12.bc6 bc6 13.cd5 ed5 14.0–0 Bd7 15.Na4 Na4 16.Qa4 Qc7 17.Bf6 gf6 18.g3 Rb8 19.Bd3 Rb4 20.Qc2 h6 21.Bf5 Bf5 (21...c5!?+=) 22.Qf5+/– Qe7? (better is 22...Be7+/–) 23.Qc8+– Kg7 24.Qc6 Qc7 25.Qd5 Qc5 26.Qc5 Bc5 27.d4 Bd6 28.Nh4 Bc7 29.Rc1 Rb7 30.Nf5 Kg6 31.e4 Bb8 (31...Ba5 32.Rc8 Kh7 33.Kg2+–) 32.Rc8 Kh7 33.d5 Ba7 34.d6 Rb1 (34...Bb6+–) 35.Kg2 Rb2 36.Rc7 Bf2 37.Rf7 Kh8 38.d7 (38.d7 Bb6 39.Kh3+–) 1–0. forsetinn (1975) – gablueskies (1730), gameknot.com, 2013.

10.Nc3 0–0 11.Be2 Qc7 12.d4 (12.bc6!? bc6 13.d4=) 12...dc4+= 13.0–0 Nd5 14.Qb1 (14.Bc4? Nc3 15.Bc3 cb5 16.Be6 Qc3–+) 14...N7b6 15.Ne4 cb5 16.Qb5 Bd7 17.Qb1 Nc8 18.Neg5 g6 19.Ne5 b5 20.Qe4 Kg7 (20...h6 21.Ngf3–/+) 21.Qh4+= h6 22.Ne4 (22.Ngf7 Rf7 23.Nf7 Kf7 24.Qh6 Bc6+=) 22...Be7–/+ 23.Qg3 Be8 24.f4 f6 (24...Qa5 25.Ng4 h5–+) 25.Ng6!+= Kh7? (25...Bg6 26.f5 Double attack (26.f5 Decoy)) 26.Nf8+– Bf8 27.Bd1 (27.Qh4!? Be7 28.Qh3 Bd7+–) 27...b4 Black plans c3 28.Bc2 f5 29.Nd2 c3 30.Nb3 Nf6 31.Qf3 Bc6 32.Qe2 Nd6 33.Nc5 Qf7 34.Qa6?? Bd5?? 35.Qb6 Nc4 36.Qb4+= Ne3 37.Rf2 Nfg4 38.Re2 Ng2 39.Rg2 Bg2 40.Kg2 Ne3 41.Kf2 Nc2 42.Qc3 Na1 43.Qa1= Kg6 44.Nd3 Bd6 45.Qg1 Kh7 46.Ne5 Be5 47.de5 Qb7 48.Qg3 Qb2 49.Kg1 Qe2 50.Qf2 Qg4 51.Qg3 h5 52.Kf2 h4 53.Qf3 Kh6 54.h3 Qg7 55.Qg2?? Qa7–+ 56.Kf1 Qa6?? 57.Kg1= Qa7 58.Kh2 Qe7 59.Qg8 Kh5 60.Qh8 Kg6 ½–½. Koester,Roman (2120) – Rudolph,Peter (2220), Hessenliga, 2007.

10.d4 Bb4 11.Nbd2 Qa5 12.Bd3 dc4 13.Bc4 cb5 14.Bd3 0–0 15.0–0 Nb6 16.Nb3 Qa4 17.Qb1 Nc4 18.Nc5 Qa3 19.Rc1 Nb6 20.Ne4 Nbd5 21.Ne5 Nd7? 22.h3?? (better is 22.Rc8 Rc8 23.Bb2+/–) 22...Ne5 (22...f5!? 23.Bb2 Qa5+=) 23.de5+= Bd7 24.Bb2 Qa8 25.Ng5 (25.Nd6!?+=) 25...g6= 26.h4 Be7 27.Nf3 Nb4 28.Be4 (28.Be2!?+=) 28...Bc6–/+ 29.Rc6? (better is 29.h5!?–/+) 29...Nc6–+ 30.Nd4 (30.h5 Kg7–+) 30...Rc8 (30...Qa6 31.h5 Ne5 32.Bc3–+) 31.h5 Kg7?? (31...Nd4 32.ed4 Ba3 33.Bb7 Qb7 34.Ba3–+) 32.hg6? (32.Nb5 Kf8–/+) 32...hg6 33.g4? Bc5?? 34.Nc6?? Rc6 35.Qd3 Qc8 36.Bc6 Qc6 37.Qd8 Qf3 38.Qf6 Qf6 39.ef6 Kf8 40.Kf1 Ke8 41.Ke2 Kd7 42.Kd3 Kc6 43.f4 b4 44.e4 Kb5 45.Bc1 Ka4 46.Kc2 b3 47.Kb1? Kb4 48.Bb2 Kc4 49.Bc1 Kd3 (49...Kd3 50.e5 Kc4–+) 0–1. Geisensetter,Kurt – Woll,Wilfried, DDR–ch M794 corr, 1985.

10.d4= dc4 11.bc6 Nb6 12.Nbd2 =.

10.Be2 0–0 11.0–0 cb5 12.cd5 Nd5 13.Bb5 Qa5 14.Qa4 Qa4 15.Ba4 Nc5 16.Bb5 Bd7 17.Bd7 Nd7 18.Nd4 Bb4 ½–½. fluors – asoka, net–chess.com, 2015.

10.Be2 0–0 11.Nc3 Qa5 12.0–0 Qc7 13.Qc2 c5 14.b6 Qb6 15.Nb5 Bb8 16.d4 dc4 17.Bc4 Qc6 18.dc5 Qc5 19.Rb1 b6 20.Bb2 Bb7 21.Ba3 Be4 22.Bc5 Bc2 23.Bf8 Bb1 24.Be7 Nc5 25.Nfd4 Be4 26.Nc3 Bb7 27.f3 Nfd7 28.Ncb5 Be5 29.Kf2 Ba6 30.g3 g6 31.Nc6 Bg7 32.Bd6 h5 ½–½. pierred (2845) – asoka, net–chess.com, 2015.

8.c4 Bd7

9.Qb3?! Qb6 10.Nf3?! (10.Nc3!?) 10...dc4 11.Bc4 cb5 12.Ne5 b4 13.Nd7 Nfd7 14.Bc3?? bc3 15.Qb6 Nb6 16.Nc3?? Nc4 0–1. Trkn – Mark van Rooij, itsyourturn.com, 2000.

9.Qb3 Bd6 10.Nf3 0–0 11.Nc3 Qa5 12.Bb2 dc4 13.Bc4 cb5 14.Nb5 Bb5 (14...Bb4 15.Nbd4=) 15.Qb5 Qb5 16.Bb5 Ne4 (16...Na6 17.Ke2+=) 17.Ke2 Rc8 18.Ra1 Rc2 (18...f5!?+=) 19.Bd4+/– h6?? (better is 19...Rc8+/–) 20.Bd3+– e5 (20...Rc7 21.Be4 f5+–) 21.Bc2 ed4 22.Be4 de3 23.de3 Nc6 (23...Kf8 24.Bb7 Ke7 25.Bd5+–) 1–0. Trkn – guest78, ICC, 2004.

9.Qb3 Ne4 10.Nc3 Qa5 (10...dc4 11.Bc4 Qa5 12.Qb1=) 11.Bb2 (better is 11.Qb1 Nf6 12.bc6 Nc6 13.cd5 ed5 14.Nf3=) 11...Bb4 (11...Nc5 12.Qa2 Qa2 13.Na2=) 12.cd5 (better is 12.Ne4!? de4 13.Bg7+/–) 12...Nc5 (12...ed5 13.Ne4 de4 14.Bg7 Bd2 15.Kd1=) 13.Qc2 White terminates the opponent with strong threats 13...ed5 (13...cd5 14.Nf3 f6 15.Kd1=) 14.Nf3 f6 (14...Bg4 15.Be2+=) 15.Be2 (15.bc6 bc6 16.Be2 0–0+=) 15...Bc3 16.Bc3 Qa4 17.Qb2 Qg4 (17...Qb3!?+=) 18.Bf6+/– 0–0 (18...gf6 19.Qf6 Rf8 20.Qd6 Qg2 21.Qb8 Ke7 22.Qe5 Kd8 23.Qg5 Qg5 24.Ng5+/–) 19.Be7+– Qg2?? (better is 19...Na4 20.Qa3 Re8+– (20...Qg2?? 21.Rg1 Qg1 22.Ng1+–)) 20.Rg1 Na4 21.Qe5 (21.Qe5 Qg1 22.Ng1+–; better is 21.Qd4 Qg1 22.Ng1 Rc8+–) 1–0. De Visser,Arno – Duinmaijer, 1981.

9.Qb3 Ne4 10.Be5 Nd6 11.b6 (11.cd5!? cd5 12.d4=) 11...dc4–/+ 12.Qb2 f6 13.Bd6 Bd6 14.Bc4 Bc5 15.Nc3 Qb6 16.Qa2 e5?? (16...Kf7 17.Na4 Qa5 18.Nc5 Qc5 19.Qc2–/+) 17.Nf3?? (better is 17.Bg8 Rg8 18.Qg8 Bf8 19.Qh7+/–) 17...Qa7–/+ 18.0–0 (18.Qb1 b5 19.Bd3 b4=+) 18...Qa2–+ 19.Ba2 Ke7 20.Na4 Bd6 21.Nb6 Be6 22.Be6–/+ Ke6 23.Rb1 Na6 24.d4 Bc7 25.de5 Be5 26.Nc4 Nc5 27.Na5 Ra8–+ 28.Nc4 h6 29.g3 Rc8 30.Nb6 Rc7 31.Kf1 Ne4–+ 32.Rb4 Ng5 33.Nh4 Bd6 34.Rc4 f5 35.f4 Ne4 36.Nf3 Bc5 37.Na4 Be3 38.Rc2 Ba7 39.Nb2 b5 40.Ne5 c5 41.Nbd3 g5 42.Nf3 Rd7 43.Nde5 Rd6 44.Ke2 g4 45.Nh4 c4 46.Nhg6 c3 47.Nd3 Bg1 48.Nge5 Bh2 49.Ke3 Bg1 50.Ke2 Ng3 51.Ke1 Ne4 52.Ke2 h5 53.Rc1 Bd4 54.Ng6 Ng3 55.Ke1 Kf7 56.Nh4 Bf6 57.Ne5 Be5 58.fe5 Re6 59.Rc3 Re5 60.Kd1 f4 61.Rb3 f3 (62.Nf3 gf3 63.Rf3 Nf5–+; 61...Kf6!? 62.Ra3–+) 0–1. Iosif,Daniela – Roth,Christiane, DamenBL2, 1992.

9.Qb3 Ne4 10.Be5 f6 11.Bb8 Qb8 12.bc6 Bc6 13.Nf3 =+.

9.Qb3 Ne4 10.Nf3 dc4 11.Qc4 Nd6 =.

9.Qb3 Be7 10.cd5 cd5 11.Nf3 0–0 12.Be2 Be8 13.0–0 Nbd7 14.Bd4 Nc5 15.Bc5 Bc5 16.d4 Bd6 17.Nc3 Bd7 18.Ra1 Ne4 19.Ne4 de4 20.Nd2 f5 21.Bc4 Rf6 22.f3 ef3 23.Nf3 Kh8 24.b6 Bc6 25.Be6 Bf3 26.gf3 Rg6 27.Kf1 Bh2 28.Qd5 Qb8 29.Ra7 Rg1 30.Ke2 Rg2 31.Kd3 h5 32.Bf5 Qe8 33.Rb7 Bf4 34.Re7 1–0. hal1958 – pdmcguigan, playchess.de, 2002.

9.bc6?!

9.Nf3 cb5 10.cb5 Qa5 11.Be5+= Qa8 12.Qc2 Be7 13.Bd3 h6 14.0–0 0–0 15.Rc1 Qa5 16.Qc7 b6? (better is 16...Qa8+=) 17.Qb7+– Bb5 (17...Ba3 18.Rc2 (18.Na3?! Qa3 19.Rc3 Qa1 20.Bf1 Bb5=) 18...Ne4 19.Na3 Qa3 A) 20.Bb8 Qa1 (20...Qd3?! 21.Rc1–/+) 21.Bf1 Bb5–+; B) 20.Bf1+–) 18.Bb5 (18.Qe7?! Bd3 19.Bf6 gf6 20.Qf6 Bg6+=) 18...Qb5 19.Bb8 Bc5 20.d4 Qb2 (20...Bb4 21.Bc7+–) 21.Rf1 Bb4 22.Ne5 (22.Qb6?! Nd7 23.Qb7 Nb8+/–) 22...Ne4 23.Qb6 Nf2 (23...Bc3 24.Qb2 Bb2+–) 24.Bd6 (24.Rf2?! Qb1 25.Rf1 Qb3+–) 24...Qe2 25.Bb4 (25...Nd1 26.Bd2 (26.Bf8?? Ne3 27.Rf2 Qd1 28.Rf1 Qf1) 26...Ne3 27.Be3 Qe3 28.Kh1+–) 1–0. Trkn – guest4290, ICC, 2005.

9.Nf3 cb5 10.cb5 Bd6 11.Be2 =.

9.Nf3 dc4 10.bc6 Bc6 11.Bc4 Be7 12.0–0 0–0 13.Nc3 Nbd7 14.Bb5 Bb5 15.Nb5 Qa5 16.Nbd4 Ra8 17.Bc3 Bb4 18.Bb4 Qb4 19.Qb1 Qb1 20.Rb1 Ne4 21.Kf1 Ndc5 22.Ne1?? Nd2–+ 0–1. hal1958 – NaoSei, HCL–A1506 playchess.de, 2003.

8.c4 Nbd7

9.Nf3 Nb6 10.bc6 bc6 11.Qb3 Be7 12.cd5 cd5 13.Bb5 Nbd7 14.0–0 0–0 15.Bf6 Nf6 16.d4 Ne4 17.Bd3 f5 18.Nbd2 Nd2 19.Nd2 Kh8 20.f4 Bd7 21.Nf3 Bd6 22.g3 Qb8 23.Rb1 Qb3 24.Rb3 Rd8 25.h4 h6 26.Kf2 Kg8 27.Be2 Kf7 28.h5 Kf6 29.Ne5 Be5 30.fe5 Kf7 31.g4 g5 (31...fg4 32.Rb7+=) 32.hg6! Kg6 33.Kg3 fg4 34.Bg4 Kg5 35.Rb6 Re8 36.Rd6 Re7 37.Bh3 Kg6 38.Kh4 Kg7 39.Bg4 Be8?? (better is 39...Bc8+=) 40.Re6 (40.Be6!? Bf7 41.Bd5 Bd5 42.Rd5 Rf7+–) 40...Re6 41.Be6 Bc6 42.Bf5 Be8 43.e4 de4 44.Be4 Kf8 45.d5 Ke7 46.Kg4 Bf7 (46...Kd8 47.d6 Kd7 48.Kf5+–) 47.Kf5 Be8 48.d6 Kd7 49.Kf6 h5 50.Bf5 Kc6 51.Bg6 (better is 51.Ke7 Kd5 52.e6 Ke5+–) 51...Bg6 52.Kg6 (better is 52.Ke7+–) 52...h4= 53.Kf7 h3 54.Ke7 h2 55.d7 h1Q 56.d8Q Qh7 57.Ke6 Qg6?? (better is 57...Qh3 58.Kf7 Qh5 59.Kg8 Qe5=) 58.Qf6+– Qg4 59.Kf7 Kd7?? 60.e6 Kc8 61.e7 Qh5 62.Qg6 Qf3 63.Qf6 Qh5 64.Kg8?? Qe8= 65.Qf8 Kd7 66.Qe8 Ke8 67.Kg7 Ke7 ½–½. orangutandu – chessxx, internet, 2013.

9.Nf3 dc4 10.Bc4 cb5 11.Bf6 (11.Bb5 Bd6 12.0–0 0–0 13.d4 b6 14.Nbd2 Bb7 15.Qe2 Ne4 16.Nc4=; 11.Be2 b4 12.Qa4 Bd6 13.Be5 Be5 14.Ne5 Nd5 15.Nd3 Qh4 16.Qb3+=) 11...Qf6 12.Bb5 Bd6 13.Nc3 Qg6 14.Nh4 Qh6 15.Qa4 Kd8 16.Bd7 +=.

9.Nf3 dc4 10.Bc4 Nb6 11.Be2 (11.Bf1 Bd7 12.bc6 Bc6 13.Ne5 Ba4 14.Qf3 Qc7 15.Bc3 Bd6 16.Qg3+=; 11.d3 Nc4 12.dc4 Qd1 13.Kd1 Ne4 14.Ke1 cb5 15.cb5 Bd7 16.b6+=) 11...Bd7 12.Qb3 Be7 13.0–0 0–0 14.Bf6 Bf6 15.d4 cb5 16.Bb5 =.

9.Nf3 dc4 10.Bc4 Be7 11.0–0 (11.bc6 bc6 12.0–0 0–0 13.Qc2 c5 14.d4 Bb7 15.Nbd2 Qc7 16.Rc1=; 11.Qc2 Nb6 12.bc6 Nc4 13.cb7 Bb7 14.Qc4 Qa8 15.Bf6 Bf6 16.Qb5=) 11...0–0 (11...Nb6 12.Be2 Bd7 13.Bf6 Bf6 14.d4 0–0 15.Qb3 cb5 16.Bb5=) 12.bc6 bc6 13.d4 (13.Qc2 Bb7 14.d4 c5 15.Nbd2 Qc7 16.Rc1=) 13...Nb6 (13...Bb7 14.Qc2 c5 15.Nbd2 Qc7 16.Rc1=) 14.Bd3 c5 (better is 14...Nbd5!?= 15.Ne5 Bb7 16.Qf3=; 14...Bb7 15.Bb2 c5 16.dc5+=) 15.dc5+/– Bc5 16.Qc2 (16.Ng5+/–) 16...Be7 17.Bf6 Bf6 18.Bh7 Kh8 19.Be4 Nd5 20.Qe2 g6 21.Rd1 Qa5 22.Qc4 (22.Nd4 Bb7+/–) 22...Ba6 23.Qc2 (23.Qb3 Rd8+/–) 23...Rc8+= 24.Qb3 (24.Qd2 Qd2 25.Nfd2 Kg7+=) 24...Qc5?? (better is 24...Be2 25.Ne1 Be5–/+) 25.Bd5+/– Qd5?? (25...ed5 26.Nd4+/– (26.Qd5?? Qd5 27.Nbd2 Bc3–+; 26.Rd5?? Qd5 27.Qb4 Rc1 28.Ne1 Qd6–+)) 26.Qd5 (better is 26.Rd5 ed5 27.g4 Rc1 28.Kg2+–) 26...ed5+= 27.Nbd2 Rd8 28.Rc1 Rc8 29.Rc8 Bc8 30.Nb3 Kg7 31.Nbd4 Bd7 32.h3 g5 33.g4 Kg6 34.Kg2 Bg7 35.Kg3 f6 36.h4 gh4 37.Nh4 Kf7 38.Nhf5 Bf8 39.Kf4 Kg6 40.Ne2 Kf7 41.Nc3 Bc6 42.e4 de4 43.Ne4 Be4 (43...Ba3!?+/–) 44.Ke4+– Bc5 45.f3 Kg6 46.Kf4 Bb4 47.Nh4 Kf7 48.Kf5 Bc3 49.Ng6 Kg7 50.Ne7 Bb2 51.Ke6 Kh6 52.f4 Kg7 53.f5 Kh6 54.Nd5 (54.Ng6 Bc3+–) 54...Kg5 55.Ne3 (better is 55.Kf7+–) 55...Bd4= 56.Nd5 Kg4?? (56...Bb2 57.Kf7 Bd4+–) 57.Nf6+– Kg5 58.Nd7 Bh8 59.Ne5 Kh5 60.Ng6 Bg7 61.Kf7?? (better is 61.Ne7+–) 61...Kg5= 62.Ke6 Bf6?? (62...Kh5 63.Nf4 Kh6+–) 63.Nf4! Bg7 (63...Kf4 64.Kf6 Deflection) 64.Nd5 Bh8 65.Ne7 Bg7 66.Kf7 (better is 66.Nc6+–) 66...Bf6= 67.Ng8 Kf5 68.Nf6 ½–½. purplegadge (1770) – critilo (1715), gameknot.com, 2014.

9.Nf3 dc4 10.bc6 A) 10...Nb6 11.Qc2 (11.Ne5 bc6 12.Nc4 Nbd5 13.Ne5 Qc7 14.Qc1 Bb7 15.Qc2 Be7 16.Nc4=; 11.cb7 Bb7 12.Bd4 Nfd7 13.Nc3 Qc7 14.Nb5 Qc6 15.Nc3 f6 16.Bb6=) 11...bc6 12.Bc4 Nc4 13.Qc4 Bb7 14.Bf6 Qf6 15.Nc3 Ba3 16.0–0+=; B) 10...bc6 11.Qc2 (11.Bc4 Bd6 12.d4 Nb6 13.Bd3 Nbd5 14.Nbd2 0–0 15.Ne5 c5 16.Ndc4=; 11.Qc1 Bb4 12.Qc4 c5 13.Bc3 Bc3 14.Nc3 Bb7 15.Be2 0–0 16.d4=) 11...Bd6 12.Bc4 0–0 13.0–0 Bb7 14.d3 c5 15.Nbd2 Qe7 16.Rb1=.

9.Nf3 Qa5

10.Bc3 Qc7 =.

10.Nc3 Bb4 11.Qb1 0–0+= 12.Be2 Ne4 13.Qb2 (13.Qc1 Ndc5 14.0–0 Nb3+=) 13...Nc3 (13...Bc3 14.dc3 Nb6 15.cd5 Nd5 16.0–0 Qc3 17.Qa2=) 14.dc3= Be7 15.0–0 Bf6 16.Nd4 (16.Qb4 Qa2 17.Bd3 Re8=) 16...Qc7+= 17.Qa3 (17.Rd1 Rd8+=) 17...c5 (17...Rd8 18.Qa7 c5 19.Nc6+=) 18.Nf3 (18.Nc2 Nb6+=) 18...b6 (18...dc4 19.Bc4 b6 20.Qa4+=) 19.cd5= ed5 20.c4 Bb7 21.Bf6 (21.Qb3 Ra8 22.Bf6 Nf6=) 21...Nf6 22.Nd2 Rd8 Black prepares the advance d4 23.f3 (23.Ra1 d4=) 23...d4 24.e4 (24.Qd3 Qe5 25.Ra1 Nd7=) 24...d3+= 25.Bd1 Nh5 (25...Bc8 26.Qc3+=) 26.Qc3 Qd6 27.Nb3 (27.Re1 Qf4+=) 27...Nf4 28.Rf2 g5 29.Rd2 Ng6 30.Bc2 Ne5 31.Bd3 Nd3 32.Nc1 Qf4 Do you see the mate threat? 33.Rd3 Rd3 34.Nd3 Qe3 35.Kf1 g4 36.Qc2 gf3 37.gf3 Qf3 38.Nf2 Bc8 39.Qd3 Qf6 40.Qg3 Kf8 41.Qb8 Qd8 42.Ke1+= Ke8 43.Qe5 Be6+= 44.Nd1 Qd3 45.Qb8 Ke7 46.Qc7 Kf6 47.Qf4 Ke7 48.Ne3 Bc4 Threatening mate... how? 49.Qc7 Kf8 50.Qb8 Kg7 51.Qe5 Kf8 52.Qb8 ½–½. Staszko,T – Vandorffy,J, corr EU–M–143, 1972.

10.Nc3 Bb4 11.Nd4 cb5 12.cd5= Bc3 13.Bc3 b4 14.Nb3 Qd5? (better is 14...Qa4!? 15.de6 bc3 16.ed7 Bd7 17.dc3 0–0=) 15.Bb4+/– b6 16.Nd4 (16.Qc2!? Bb7 17.f3+/–) 16...Nc5+= 17.Nb5 Kd8 (17...0–0!? 18.d4 Rd8+=) 18.d4+/– Nb7 (better is 18...Na6!? 19.Qc1 Bd7+/–) 19.Qc2+– Ne8 (19...Qd7 20.Ba3+–) 20.e4 (20.Bd3 Na5 21.0–0 Nc6+–) 20...Qg5 (20...Qd7 21.Bd3 Nbd6 22.Nd6 Nd6+–) 21.h4 Qf6 (21...Qf4 22.Rh3 Qb8+–) 22.Qc6 e5 (22...Qf4 23.Bd3 Bd7 24.Qb7 Qc1 25.Ke2 Qb2 26.Ke3 Qb4 27.Qb6 Ke7 28.Rb1 Qb1 29.Bb1+–) 23.Qd5 Bd7 24.Qb7 Bb5 (24...Qc6 25.Qb8 Bc8+–) 25.Qb8 (25.Be7 Qe7 26.Qb8 Kd7 27.Bb5 Ke6 28.Qe5) 25...Kd7 26.Bb5 Ke6 (26...Qc6 27.Qb7 Nc7 28.Bc6 Ke6 29.Qc7 ed4 30.Qe7) 27.d5 1–0. De Cat,Ben (1925) – Stone,Stephen, NATO Chess Championship, 2010.

10.Nc3 Bb4 11.Nd4 Qb6 =.

10.Nc3 Bb4 11.Nd4 e5 12.Nc2 +=.

10.Nc3 Nb6 11.cd5 cd5 12.Be2 Bd6 13.0–0 0–0 (13...Bd7 14.Qb3=) 14.Qb1 (14.Qb3 e5=) 14...Bd7 (14...e5 15.Rc1=+) 15.e4= Be7 16.Bd3 g6 (16...de4 17.Ne4 Nfd5 18.Be5=) 17.Qb2 (17.e5 Nh5+=) 17...Ba3+= 18.Qb3 Qb4 19.Qb4 Bb4 20.Na2 (20.e5 Nh5 21.Ne2 Nc4=) 20...Be7 21.e5 Ne4 (21...Nh5 22.Rb1=) 22.Bd4 (22.Nc3 Nc3 23.Bc3 Nc4=) 22...Nc4=+ 23.Bc4 dc4 24.Rb1 Ra8 25.Nc3 Nc3 26.Bc3 Kg7 27.Kf1 g5 28.g4 Kg6 29.Ke2 Ra3 (29...h5 30.h3=+) 30.Nd4 f6 31.Nc6? (better is 31.b6!?=+) 31...bc6–+ 32.b6 Ra8 33.b7 Rb8 34.Ba5 Bc8 (< 34...fe5 35.Bc7 Rb7 36.Rb7+/–) 35.bc8Q Rc8 36.Rb7 Bc5 (36...Re8 37.Bc3=) 37.ef6 Kf6 38.Rh7 Bd4 (38...Kg6 39.Rb7=) 39.Rh6+= Kf7 40.h4 gh4 41.Rh4 Ra8 42.Rh5 c5 43.Bc3 ½–½. Diener,Rudolf – Yefimov, corr ICCF, 1985.

10.Nc3 Bd6 11.Be2 0–0 (11...dc4 12.Bc4 Nb6 13.Bd3=) 12.0–0 Qc7 (12...dc4 13.Bc4 Nb6 14.Be2=) 13.d4 (13.bc6 bc6 14.cd5 ed5=) 13...dc4 14.Bc4 Nb6 (14...c5 15.dc5 Nc5 16.Na4=) 15.Be2 (15.Bd3 Bd7+=) 15...Nbd5 (15...Bd7 16.Qd3=) 16.Qb3 (16.bc6 bc6 17.Qd2 Bb7=) 16...Nc3 (16...Bd7 17.Nd5 cd5 18.b6=) 17.Qc3 (17.Bc3 cb5 18.Bb4 Bb4 19.Qb4 Bd7=) 17...Nd5 (17...Bd7 18.Rc1=) 18.Qb2 cb5 (18...Bd7 19.Bd3=) 19.Rc1 (19.Bb5 Qe7+=) 19...Qe7 20.Qb5 (worse is 20.Bb5 Ba3 21.Qc2 Bc1 22.Qc1 Bd7–/+). Adam – Gerhardt, corr ICCF, 1974.

9.Nf3 Bd6

10.Qb3 0–0 11.Be2 (11.d4! Ne4 (11...Qa5 12.Bc3) 12.c5) 11...e5 12.0–0 dc4 13.Bc4 c5 14.Ng5!? (14.d3!) 14...Qe7 15.Nc3 Nb6 16.Nce4 Nc4 17.Qc4 Ne4 18.Ne4 Be6 19.Qc3 f6. Vodep – Janetschek, 1967.

10.Nc3 0–0 11.Be2 e5 12.Qb3 Nc5 Black plans e4 (12...e4 13.Nd4 dc4 14.Bc4+=) 13.Qc2+= e4 (13...Bg4 14.d4 Bf3 15.dc5 Be2 16.Ne2 Bc5 17.Be5 Bb4 18.Bc3 Bc3 19.Nc3–/+) 14.Nd4= Qc7 (14...Bd7!?=) 15.bc6+= bc6 16.cd5 Qa5 17.0–0 cd5 (17...Nd5 18.Ne4 Ne4 19.Qe4 Qd2 20.Bc4+/–) 18.Ncb5+/– Be7?? (better is 18...Qb6 19.Nd6 Qd6+/–) 19.Nc6+– (19.Nc6 Qd8 20.Nd8 Rd8 21.Bf6 gf6 22.d4 ed3 23.Bd3 Nd3 24.Qd3+–) 1–0. Gedigk,Detlef – Markus, corr SOK, 1988.

10.d4 =.

10.Be2 0–0 11.0–0 Qc7 12.Nc3 Nb6 (12...e5 13.bc6 (13.cd5 e4 14.Nd4 c5 15.b6 Bh2 16.Kh1 Qb6 17.Na4 Qd8) 13...bc6 14.cd5= e4 15.Nd4 Nd5 16.Ne4 Bh2 17.Kh1 Be5; 12...dc4 13.Bc4 Ng4 14.bc6 Bh2 15.Kh1 Nde5 16.Ne5 Ne5 17.Be2 Ng6; 12...Re8 13.d4 dc4 14.Bc4 c5 15.b6 Qb6 16.Nb5 Be7 17.Qc2 Nd5; 12...Ne4 13.Qc2 f5 14.cd5 cd5 15.Rc1 b6 16.d3 Nef6 17.Na4 Qb8) 13.bc6= Nc4 (13...bc6 14.cd5 ed5 15.Qc2 Be6 16.g3 Ra8 17.Rb1 Bg4) 14.cb7 (14.Nb5 Qc6 15.Nd6 Qd6 16.d3 Na5 17.Bc3 Nc6) 14...Qb7 15.Bc4 (15.Qb1 Na3 16.Qb7 Bb7 17.Nb5 Nb5) 15...dc4 16.Qc2 (16.Qa4 Qa6 17.Rb1 Rd8) 16...Qa6 (16...e5 17.Rb1 Qe7) 17.Ne4 (17.Ne2 c3) 17...Ne4 18.Qe4 Bb7 19.Qg4 g6 20.Qh4 f6 21.Bf6 Bf3 22.gf3 Bh2? (better is 22...Qa5=) 23.Kh2+– c3 24.Rg1 Qd6 25.Kh1?? (better is 25.f4 cd2 26.Bd4+–) 25...Rf6?? (better is 25...cd2 26.Qd4 Qd4 27.Bd4 Rc8= (27...Rf3? 28.Kg2 Rf5 29.Rd1+–)) 26.Qf6+– cd2 27.Qd4 (27.Rd1!? Qd5+–) 27...Qc6 28.Qd2 Qf3 29.Rg2 1–0. Agrest,Roman (2160) – Isetoft,Magnus, Scandinavian Chess Tournament, Taby SWE, 2007.

10.Be2 Qc7 11.Nc3 e5 12.bc6 bc6 (12...Qc6 13.Nb5 0–0 14.Qb3 Bb8 15.0–0 Nc5 16.Qc2 e4 17.Ne5 Qe6+=) 13.cd5 Nd5 (13...cd5 14.Nb5 Qc6 15.Nd6 Qd6 16.0–0 0–0 17.Qc2 Re8=) 14.Ne4 Be7 (14...0–0 15.0–0 c5 16.Qb3 N5f6 17.Nfg5 Ne4=) 15.0–0 0–0 (15...f5 16.Ng3 0–0 17.Qc2= e4=) 16.d4 N5f6 (16...ed4 17.Bd4 Bb7 18.Bc4=) 17.Ng3 (17.Nf6 Bf6 18.Qc2 ed4 19.Bd4 Bb7+/–) 17...ed4 (17...Bd6+=) 18.Nd4 Rd8 19.Qc2 c5 20.Ngf5 Bf8 21.Nb5 Qc6 22.Na7 Qe4 (22...Qc7 23.Nc8 Rc8 24.Rd1+=) 23.Bd3 (better is 23.Qe4 Ne4 24.Nc8 Rc8 25.Bg7+/–) 23...Qg4 (better is 23...Qb7!? 24.Nc8 Rc8+/–) 24.f3 Qh5 25.Nc8 (better is 25.g4!? Qh3 26.Rf2 Ng4 27.fg4+–) 25...Rc8+/– 26.g4 Qh3 27.Rf2 Ng4 28.fg4 Qg4 29.Rg2 Qf3 30.Be4 Qh5 31.Ng7 Bg7 32.Bg7 Nf8 33.Bf8 Kf8 34.Bh7 Rc6 35.Rg8 Ke7 36.Bf5 Rd6 37.Qe4 Kf6 38.Bg4 Qe5 39.Qe5 Ke5 40.Re8 Kd5 41.Kf2 Rb6 42.h4 c4 43.Rc8 Rb4 44.h5 c3 45.Bf3 Ke5 46.Rc3 Kf6 47.Rc6 Kg7 48.Kg3 Rb5 49.h6 Kh7 50.Be4 f5 51.Bc2 Kg8 52.Kf4 (52.Kf4 Rb8 53.Rc7+–) 1–0. Pandurevic,Miro (2260) – Stubljar,Andrej (2070), 24th Open, Bled SLO, 2003.

8.c4 Ne4

9.Nc3 cb5 10.Nb5 dc4 11.Bc4 Nf2 12.Kf2 Qh4 13.g3 Qc4 14.Bg7 Rg8 15.Bf8 Qb5 =+.

9.Nc3 cb5 10.Nb5 dc4 11.Nf3 =.

9.Nc3 Nd6 10.c5 (10.cd5 cd5 11.Nf3 Be7=) 10...Nf5 (10...Nb5 11.Nb5 cb5 12.Bb5 Bd7 13.Qb1+=) 11.d4 b6 12.Na4 (12.cb6 Qb6 13.Nf3 Qa5=) 12...bc5+= 13.dc5 cb5 14.Bb5 Bd7 15.Bd7 Nd7 Attacks the isolani on c5 (worse is 15...Kd7 16.e4 Ne7 17.Nb6 Ke8 18.Nf3 de4 19.Qd8 Kd8 20.Ng5+=) 16.Nf3 (16.g4 Nh4 17.Qb3 Qa5 (17...Nc5 18.Nc5 Qa5 19.Bc3 Qc5 20.Qa4 Kd8 21.Ba5 Kc8 22.Qe8 Kb7 23.Qf7 Qe7 24.Qe7 Be7 25.Bc3+=) 18.Bc3 Qa6–/+) 16...Nc5 17.0–0 Na4 (better is 17...Qa5!? 18.Nc5 Bc5–/+ (18...Qc5? 19.Qa4 Ke7 20.Ne5+–)) 18.Qa4= ½–½. Dijkhuizen,A – Sennema,H, Barneveld, 2000.

9.Nc3 Nd7 10.Nf3 Ndf6 11.bc6 bc6 12.Ne4 de4 +=.

9.Nc3 Nd7 10.Nf3 Ndf6 11.Be2 Bb4 12.0–0 (12.bc6 bc6 13.Ne4 de4=) 12...0–0= 13.Qb3 (13.Ne4 Ne4 14.Qc2 Qe7+=) 13...Bc3 (13...Be7 14.d3 Nc5 15.Qc2+=) 14.Bc3+= Nc3 15.Qc3 Ne4 16.Qb2 Qb6 (16...dc4 17.bc6 bc6 18.Bc4+=) 17.Rc1 dc4 (17...f6 18.d3 Nd6 19.Qc2 dc4 20.dc4+=) 18.Qe5 Nf6 19.bc6 Qc6 (19...bc6 20.Bc4 (20.Rc4? Ba6 21.g3 Rd8–+) 20...c5 21.Bd3+=) 20.Rc4 (20.Bc4 Bd7+=) 20...Qb6 21.Qc5 Qc5 22.Rc5 Ne4 23.Rc7 Rd8 24.d4 Nd6 25.Ne5 Kf8 26.Nc4 Nc4 27.Bc4+/– g6 28.f3 Kg7 29.e4 Kf6 30.Kf2 Bd7 31.Rb7+– Rc8 32.Rd7 Rc4+/– 33.h4 Rc2 34.Ke3 Rc6 35.Kd3 h5 36.Ke3 Rb6 37.Kf4 Ra6 38.g4 Ra5 39.e5 Kg7 40.gh5 gh5 41.Kg5 (41...Ra1 42.Kh5+–) 1–0. Adam,Stefan – Mueller,Siegmar, corr DDR–ch11 sf02, 1981.

9.Nc3 Nd7 10.Nf3 Ndf6 11.Be2 Bd6 12.0–0 =.

8.c4 Be7

9.Be2 0–0 10.Nf3 Nbd7 11.cd5 ed5 12.bc6 bc6 13.0–0 Qc7 14.Nc3 Ne4 15.Ne4 de4 16.Nd4 Ne5 (16...Bd6 17.Qc2=) 17.Qc2+= Exerts pressure on the isolated pawn 17...f5 18.Bc4 Kh8 19.Be2 Bf6 20.Nb5 Qd7 21.Nd4 Bb7 22.Rc1 Nd3 (better is 22...Ra8!?=) 23.Bd3+/– ed3 24.Qd3 Rc8? (better is 24...Ra8!? 25.Bc3 Bd4 26.Qd4 Qd4 27.Bd4 Ra5+/–) 25.Qf5+– Qf5 (25...Qd5 26.e4 Qa2 27.e5+–) 26.Nf5 Ba1 27.Ra1 Rd8 28.Rb1 (28.d4 g6 29.Ng3 Bc8+–) 28...Ba8? (28...Rd2 29.Ng7 Bc8 30.Nh5+–) 29.h3 (29.d4 Kg8 30.f3 Kf7+–) 29...h6 (29...c5 30.Nd6 Kg8 31.Rb6+–) 30.d4 Kh7 31.Kh2 (31.Ra1 Bb7+–) 31...Kg6 (31...c5 32.Ra1 (32.dc5?! Be4 33.Rc1 Bf5+/–) 32...cd4 33.Nd4+– (33.ed4?! Be4 34.Ng3 Rd4+/–)) 32.g4 Kf6 33.f4 g6 (33...h5 34.e4 g6 35.e5 Ke6 36.Nd6+–) 34.Nh4 (better is 34.Nh6!? Ke7+–) 34...Re8 35.Re1 Bb7 36.Nf3 (better is 36.e4!? Ba6+–) 36...c5 37.Ne5 cd4 38.ed4 Re7 39.Rb1 Be4 40.Rb6 Kg7 41.Kg3 g5 (41...Ra7+–) 42.f5 Rb7 43.Rg6 (43.f6!? Kg8 44.Rd6 Kh7+–) 43...Kh7 44.Rd6 Rb3 (44...Rb2 45.h4 Rb3 46.Kf2+–) 45.Kh2 (45.Kf2!? Rb5+–) 45...Rb2 46.Kg1 Rb3 (46...Rb5 47.Rd7 Kg8 48.f6+–) 47.f6 (better is 47.Rd7 Kh8 48.f6 Rb8 49.Nf7 Kg8 50.Nh6 Kf8+–) 47...Bg6 (47...Rb7+–) 48.Rd7 Black resigned 1–0. retiponziani – Mr.Oldenslo, ChessWorld.net, 2012.

9.Nf3 cb5 10.cb5 0–0 11.Be2 Bd7 12.0–0 Ne4 13.Bd3 Qa5 The isolani on b5 becomes a target 14.Bc3 Nc3 15.Nc3 Bf6 16.Qc2 Rc8 17.Nd4 (17.Bh7!? Kf8 18.Bd3=) 17...g6 18.Qb2 Bd4 19.ed4 Qb6 20.Na4 Qd6 21.Nc5 b6 22.Nd7 Nd7 23.Rc1 Rc1 24.Qc1 Qf4 25.Qc3 Nf6 26.Be2 Ne4 27.Qe3 Qc7 28.g3 Qc1 29.Kg2 Qd2 30.Kf3 (better is 30.h3!?–/+) 30…Qe3 ½–½. Hal1958 – Schnitzly, playchess.de, 2004.

9.Nf3 dc4 10.Bc4= cb5 11.Bb5 Bd7 12.Qa4 (12.Bf6 Bf6 13.Bd7 Nd7=) 12...0–0 13.0–0 Bb5 14.Qb5 Qd5 15.Qb2 Nbd7 (15...Rc8 16.Nc3 Qd7 17.Rb1=) 16.Nc3 Qc6 17.Nd4 Qa6 18.Rb1 Rb8 19.Ndb5 Bf8 20.d4 Qc6 21.Rc1 Qa6 (21...Nb6 22.Qc2=) 22.Qb3 Rc8 23.Bb2 Qa5 24.Kf1 (24.Ra1 Qb6+=) 24...Qb4= 25.Qb4 Bb4 26.Ke2 Nb6 27.Na2 Rc1 28.Bc1 Be7 29.f3 Kf8 30.e4 h6 31.Bf4 Nc8 (31...g5 32.Bc7 Nc4 33.Kd3 Nb2 34.Kc3 Nd1 35.Kd2=) 32.Kd3 Ke8 33.Nac3 Kd7 34.d5 ed5 35.ed5 Nd6 36.Nd6 Bd6 37.Bd6 Kd6 38.Kd4 Nd7 39.f4 ½–½. Sternik,Ryszard – Czaban,Czeslaw, Olsztyn, 1990.

9.Nf3 Nbd7 10.Nc3 0–0 11.Be2 dc4 12.bc6 Nb6 (12...bc6 13.Bc4 c5 14.d3=) 13.Ne5 Qc7 (13...Bd6!? 14.Nc4 Nc4 15.Bc4 bc6=) 14.Nb5+/– (worse is 14.Nc4 Nc4 15.Bc4 Qc6+=) 14...Qd8 15.Nc4 (15.Bd4!?+/–) 15...bc6 (15...Nc4 16.Bc4 bc6 17.Nd4=) 16.Nd4 Qc7 (16...Bd7 17.0–0=) 17.Qb3 (17.Nb6 Qb6 18.Qb3 Qc7=) 17...Nc4 18.Qc4 The isolani on c6 becomes a target 18...Bb7 (18...c5 19.Nf3=) 19.0–0 (19.Bf3 Rb8=) 19...Rc8 (19...c5 20.Nf3=) 20.Rc1 The pressure on the isolated pawn grows (better is 20.d3=) 20...Bd6 (20...c5 21.Nf3=) 21.h3 (better is 21.Ne6!? fe6 22.Qe6 Kh8 23.Bf6 Bh2 24.Kh1+–) 21...Nd5 (21...e5 22.Nf5+=) 22.Nf3 (22.Bf3 Qd7=) 22...Ra8 23.Qd4 (23.Qg4 e5=) 23...f6 (23...e5 24.Qh4=) 24.Bc4 (24.Qh4 Qd7=) 24...c5 (24...Qe7 25.Qg4=) 25.Qd3 (25.Qg4 Qe7=) 25...Qe7 26.Qb3 Kf7 27.e4 Nb4 28.e5+= White gets the initiative 28...Bc7 29.Re1 f5?? 30.Be6!+– Kf8 31.Bf5 g6 32.Be6 Rd8 33.Bc4 Bc6 34.e6 (34.e6 Ke8 35.Qc3+–) 1–0. Junge,W – Gleichmann,HG, corr, 1975.

9.Nf3 Nbd7 10.Ne5 Ne5 11.Be5 Bd7 12.Qb3 0–0 13.Be2 Ne8 (13...dc4 14.Bc4 cb5 15.Bb5+=) 14.b6 f6 15.Bg3 Bc8 (15...Bc5 16.d4 Qb6 17.Qb6 Bb6 18.Nd2+=) 16.0–0 (16.d4 Rf7+=) 16...Bd6 (16...d4!?=) 17.d4 dc4 18.Bc4 Qe7 19.Nd2 Bg3 20.fg3 Kh8 21.Ra1 Nd6 22.Qb4 Nf5 (22...Re8 23.Ra8 Qd8 24.Bb3+=) 23.Qe7+/– Ne7 24.e4 Bd7 25.Nb3 Nc8 26.Nc5 Nb6 27.Nd7 (worse is 27.Ne6 Re8 28.Nc5 Nc4 29.Nd7 Kg8–/+) 27...Nd7 28.Be6 Nb8 29.Ra8 g6 30.g4 Re8 31.Kf2 Kg7 32.d5 Kf8 33.Ra7 Re7 34.Ra8 (34.Bc8 Rc7 35.Bb7+/–) 34...Re8= 35.Ra7 ½–½. Peter,Falco – Ullrich,Helmut (1710), Karl Mala mem op 9th, 2005.

9.Nf3 0–0

10.Qa4 Bd7 11.Nc3 Qc7 12.Be2 e5 13.cd5 cd5 14.0–0 Na6 15.d4 ed4 (15...e4 16.Ne5 Nb4 17.Rb1+/–) 16.Nd4 (16.Qd4 Nb4+=) 16...Nc5= 17.Qa2 The isolani on d5 becomes a target 17...Be6 18.Bb2 Nce4 ½–½. McKenna,James (1925) – Parmar,Amisha, Coventry op 1st, 2004.

10.Qc2 cb5 11.cd5 Nd5 12.Bb5 Qa5 13.Qa4 Qa4 14.Ba4 Bd7 15.Bd7 Nd7 16.0–0 Ra8 17.Nc3 N7f6 18.Nd4 Bb4 19.Nb3 h6 20.Bb2 Nc3 21.Bc3 Bc3 22.dc3 Ra3 23.Nc5 b6 24.Nb7 Rc3 25.Rb1 g5 26.h3?! Ne4 27.f3 Nd2 28.Rb2 Nc4 29.Rb4 Ne3 30.Rb6 Rc2 31.g4 Rg2 32.Kh1 Rf2 0–1. Trkn – marloes, itsyourturn.com, 2000.

10.Qc2 cb5 11.Ng5 g6 12.cb5 Bd6 =.

10.Qc2 dc4 11.Bc4 c5 (11...cb5 12.Bb5 Bd6 13.0–0=) 12.0–0 b6 13.Ng5 (13.d4 Bb7+=) 13...h6 (13...Nbd7 14.d4=) 14.Bf6+= Threatening mate: Qh7 14...hg5 15.Bb2 (15.Be7 Qe7 16.Nc3 Bb7+=) 15...Bb7 16.d4 (16.Nc3 Bf6+=) 16...Bd5 (16...cd4 17.Bd4 Bd6 18.Rc1+=) 17.dc5 (17.Bd5 Qd5 18.Nc3 Qc4 19.dc5 Bc5+=) 17...Bc4 18.Qc4 bc5 19.Nc3 Qc7 20.Ne4 Attacks the isolani on c5 (20.Rb1 Rd8+=) 20...Nd7+= 21.g3 (21.Rd1 Rd8+=) 21...Nf6 (21...Rd8!?=) 22.Ng5+/– Rd8 23.Ne4 (23.Rc1 Qb6+/–) 23...Ne4 24.Qe4 Qd6 (24...Qa5 25.Qb7 Bd6 26.Ra1+/–) 25.Qc2 (25.Ra1!?+/–) 25…Qb6 (25...Qd3!? 26.Qa4 Rb8=) ½–½. Labahn,Wolfgang – Mehl, Espelkamp, 1980.

10.Qc2 Bd7 11.Ng5 g6 12.Nc3 =.

10.Be2 dc4 11.Bc4 cb5 12.Bb5 =+.

10.Be2 Bd7 11.Qb3 dc4 12.Bc4 cb5 13.Bb5 Qa5 14.Bd7 Nbd7 15.Bf6 Bf6 16.0–0 b5 17.Nc3 b4 18.Ne4 Be7 19.Rc1 Ra8 20.d4 Qb6 21.Ned2 Ra3 22.Qb1 Rc3 23.Nb3 Qc6 24.Nfd2 Nb6 25.h3 g6 26.Rd1 Nc4 27.Kh1 Nd2 28.Rd2 Qc4 29.Rb2 Bh4 30.g3 Bg3 31.fg3 Re3 32.Kh2 Re2 33.Re2?? Qe2–+ 34.Kg1 Qf3 35.Nc5 Qg3 36.Kf1 Qf3 37.Kg1 Qe3 38.Kg2 Qd4 39.Nd3 Qe4 40.Kf2 h5 41.Qb3 Qd4 42.Ke2+= Qc3 43.Qb4 Qb4 44.Nb4 Kg7 45.Kf3 g5–+ 46.Nd3 f6 47.Nc5–/+ g4 ½–½. Barlag,Christoph (2095) – Winkelmann,Elena (2065), Werther Schloss op–A, 2008.

10.Be2 Bd7 11.bc6 Bc6 12.d3 dc4 13.dc4 Bb4 14.Kf1 Nbd7 =+.

10.Be2 Bd7 11.Ne5 cb5 12.Nd7 (12.cb5 Qb6=) 12...Nbd7 13.cd5 (13.cb5 Qc7=) 13...Nd5=+ 14.Bb5 (14.0–0 b4=+) 14...N7f6 (14...Qa5 15.Bd7 Qa1 16.0–0=+) 15.0–0= ½–½. Rohrbacher,Walter – Seyffer,Guenter, Baden–ch Sen, 2002.

10.Be2 Bd7 11.Ne5 dc4 12.bc6 Nc6 13.Nc4 =+.

10.Be2 Nbd7 11.0–0 cb5 12.cb5 Bd6 13.d4 =.

10.Be2 Nbd7 11.0–0 Nb6 12.Qc2 (12.Bf6 Bf6 13.c5 Nd7=) 12...dc4 (12...Nc4 13.bc6 bc6 14.Bc4 dc4 15.Bf6 Bf6 16.Qc4=) 13.Bc4 (13.bc6 Qc7=) 13...Nc4+= 14.Qc4 Bd7 15.Nc3 (15.Qf4 c5 16.Nc3 Qa5+=) 15...cb5 16.Nb5 Qa5 17.Nbd4 (17.Rb1 Rc8 18.Qf1 Bb5 19.Rb5 Qb5 20.Qb5 Rc1 21.Qf1 Rf1 22.Kf1 b5=) 17...Rc8 18.Nb3 (18.Qd3 Qd5 19.Qb1 b5+=) 18...Qd5 (18...Qb6 19.Bd4 Rc4 20.Bb6+=) 19.Qd5+= Nd5 20.Rc1 Rc1 21.Nc1 f6 22.Nd4 (22.e4 Nf4–/+) 22...e5 (22...Kf7 23.e4 Nf4 24.Ndb3–/+) 23.Ndb3+= b5 (23...Ba3 24.d4 e4 25.Ne2+=) 24.Bb2 (24.e4 Nf4+=) 24...b4 (24...Nb6 25.e4–/+) 25.Kf1 (25.e4 Nb6–/+) 25...Bb5 (25...Nb6 26.d4 Nc4 27.Ba1–/+) 26.Ke1 Bd6 27.h3 (27.d4 e4–/+) 27...Nb6 (27...Kf7 28.d4–/+) 28.g3 (28.e4 Nc4 29.Ba1 Na3–/+) 28...Nc4 (28...Na4 29.Ba1–/+) 29.Ba1–/+ Na3 30.Bb2 Kf7 31.Kd1 g5 32.d3 Ba4 33.Ba3 ba3 34.Kc2 h5 35.g4 hg4 36.hg4 Ke6 37.e4 Kd7 38.Kb1–/+ Bb5 39.Ka2 Kc7 40.Nd2 Bd7 41.f3 Be6 42.Ncb3 Kc6 43.Nc4 Bc4 44.dc4= Bb4 ½–½. Labahn,Wolfgang – Husemann,G, Verbandsklasse, 1981.

10.Be2 Nbd7 11.0–0 Qc7 12.Nc3 e5 13.cd5 cd5 14.Qb3 (14.Qc2 e4 15.Nd4 Nc5=) 14...Qd6 15.Rc1 Nc5 16.Qa2 (16.Qc2 d4 17.ed4 ed4=) 16...e4 (16...d4 17.ed4 ed4 18.Nb1=+) 17.Nd4= Be6 (17...Bd7 18.Qc2=) 18.Bb2 b6 19.Nc6 (19.Qb1 Ra8=) 19...Bd8=+ 20.Qa7 Bc7 21.Na4?? (better is 21.g3=) 21...Qh2 22.Kf1 Qh1# 0–1. Fredek (2090) – Ogelb, Freundschaftspartie, 5m + 0s, 2005.

10.Be2 Ne4 11.Nc3 Nc3 12.Bc3 Bf6 (12...dc4 13.Bc4 cb5 14.Bb5=) 13.Bb4 (13.Bf6 Qf6 14.d4 dc4 15.Bc4 c5+=) 13...Re8= 14.d4 (14.cd5 ed5 15.d4 cb5=) 14...Be7 (14...dc4 15.Bc4 Bd7 16.Bd3=) 15.Be7+= Qe7 (15...Re7 16.0–0+=) 16.0–0 Qc7 (16...dc4 17.Bc4 cb5 18.Bb5+=) 17.c5 (17.Qb1 c5+/–) 17...b6 18.Qa4 (18.Qc2 cb5 19.Bb5 Bd7+=) 18...f6 (18...bc5 19.dc5 cb5 20.Qb5=) 19.bc6 (19.Qc2 e5+/–) 19...Nc6 (19...bc5 20.dc5 e5 21.Qb3+=) 20.Rb1 (20.cb6 Qb6 21.Bd3 g6+/–) 20...bc5= 21.dc5 Bd7 22.Rb6 (22.Qa6 Rb8 23.Rb8 Qb8=) 22...Ne5+= 23.Qb4 White begins to deal mighty blows 23...Nf3 24.gf3 Rc8 (24...Ra8 25.Bd3=) 25.Ba6 (25.c6!? Bc6 26.Ba6+=) 25...Ra8= 26.Rb7 Qd8 27.Qb6 Kf8?? (better is 27...Qe8=) 28.Qd6+– Ke8 (28...Qe7 29.Qe7 Ke7+–) 29.Bb5 f5 (29...Qe7 30.Bd7 Kf8 31.Rb8 Rb8 32.Qb8 Kf7+–) 30.Qd7 Qd7 1–0. Czada – Peschke, Braunschweig, 1987.

10.Ng5 Ne8 11.Nf3 dc4 12.bc6 b5–/+ (12...bc6?! 13.Bc4 c5 14.0–0=).

10.Ng5 h6 11.h4 (11.Nf3 Bd6+=) 11...Nbd7 (better is 11...dc4 12.Qc2 g6–/+ (worse is 12...hg5 13.hg5 g6 14.gf6 Bf6 15.Bf6 Qf6 16.bc6+=)) 12.Qc2? (12.Nf3 dc4 13.bc6 Nb6+=) 12...Re8?? (12...hg5 13.cd5 cd5 14.Bf6 Nf6 15.hg5–+) 13.f4? (13.Nf3 c5+=) 13...Nf8?? (better is 13...hg5!? 14.hg5 Ne4–+) 14.Qb2 (14.Nf3 Bd7+=) 14...Bd6 (14...e5!? 15.fe5 hg5 16.ef6 Bf6–/+) 15.Nf3+= Qa5 16.g4 Qb4 17.g5+= Qb2 18.Bb2 hg5 19.hg5 N6d7 20.d4+/– dc4 21.Bc4 Nb6+= 22.Bd3 Nd5 23.Ke2 cb5 Black fights for the Initiative 24.Bb5 Bd7 25.Bd3 Bc6= 26.Nbd2 Ra8 27.Ra1 Ra1 28.Ba1 Nd7 29.Nc4 Bf4!–/+ 30.g6 fg6 31.Bg6 Be3! 32.Be8 Bf4 33.Na5 N5f6 34.Bg6 Bd5 35.Bc2 b6 36.Nb3 Bc4 37.Kf2 Ng4 38.Kg1 Ne3 (38...Ne3 39.Nfd2 Nc2 40.Nc4 b5–+ (40...Na1?! 41.Na1 b5 42.Na3–+); better is 38...Bd5 39.Ne1–+) 0–1. Woerlein,Rene – Schmidt,Michael, Ostalb–ch Schwaebisch Gmuend, 1998.

10.Qa4 c5

11.Be2 Nbd7

12.d3 b6 13.Qc2 Bb7 14.0–0 Qc7 15.Nc3 Ra8.

12.d3 Qb6 13.0–0 dc4 14.Qc4 Qd6 15.d4 cd4.

12.d3 dc4 13.dc4 Qc7 14.Bd3 Rd8 15.0–0 Bd6.

12.d3 Qc7 13.Nc3 Nb6 (13...b6 14.0–0+= (14.cd5 ed5 15.0–0 Bb7) 14...Bb7 15.Qc2 Ra8; 13...Rd8 14.cd5 ed5 15.0–0 Qd6) 14.Qb3= (14.Qc2 Rd8 15.cd5 ed5) 14...Bd6 15.h3 (15.0–0 d4) 15...dc4 (15...Rd8=) 16.dc4 Nbd7 17.0–0 b6 18.Ng5 (18.Bb2 Bb7=) 18...h6 19.Nge4 Ne4 20.Ne4 Bh2 21.Kh1 Be5 (21...Bb7 22.f4 Be4 23.Kh2+=) 22.Nc3 (22.Qd3 f5 23.Be5 Ne5+=) 22...f5 (22...Bb7 23.f4 Bd6 24.Rd1=) 23.f4= Bf6 24.Qc2 g6 25.e4 (25.Bf3 Bb7=) 25...Bd4 26.ef5 gf5 (worse is 26...ef5 27.Nd5 Qd6 28.Bd4 cd4 29.Qd3+/–) 27.Bd3 (27.Qd2 Nf6=) 27...Nf6+= 28.Ne2 Ba1 29.Ra1 Nh5 30.Qd2= Bb7 31.Rf1 Qg7–/+ 32.Rf2 Ra8 33.Qe3 Ra1 34.Kh2+= Kf7 35.Bc2 Rf1 36.Bd3 Qa1 37.Rf1= Qf1 38.Qg1 Qg1 39.Kg1 Nf6 40.Nc3 ½–½. Bastholm,Niels Henrik – Van Damme, corr Castiglioni Cup (A.S.I.G.C.), 1980.

12.d3 Qc7 13.Nbd2 b6 14.cd5 ed5 15.0–0 Bb7 16.Rc1 Ra8 17.Qb3 Qb8 18.Bc3 Ra7 19.Ra1 Ra1 20.Ba1 Bd6 21.h3 Qa8 22.Bc3 h6 23.Qb2 Qb8 24.Nh4 Be5 25.d4 cd4 26.ed4 Bh2 27.Kh1 Bd6 28.Nf5 Bf8 29.Nf3 Ne4 30.Bd3 g6 31.Ne3 Qc7 32.Be4 de4 33.Ne5 Ne5 34.de5 Bg7 35.Ng4 (35.Bd4 Bf8+=) 35...Qc4 36.Bd4 Bc8 37.Ne3 Qe6 38.Qa1 Bd7 39.Qa8 Kh7 40.Qe4 Bb5 41.Qd5 Qe8 42.f4 Bc6 43.Qb3 b5 44.Qc2 (better is 44.Kg1!?=) 44...Qd7–/+ 45.Bb6 Qh3 46.Kg1 Qd7 47.Qc5 Be4 48.Qd6 Qc6 49.Bc5 Qb7 50.Kf2 Qc6 51.g3 (51.Kg1 Qa8 52.Qd7–/+) 51...Bh1 52.Qc6 Bc6 53.Nc2 g5 54.Nd4 Bd7 55.Kf3 Kg6 56.Ke4 gf4 57.gf4 f6 (57...h5 58.Be7–/+) 58.Kd5 White prepares the advance e6 (better is 58.e6!? Be8 59.f5 Kg5 60.e7=) 58...fe5–/+ 59.fe5 h5 60.e6 Be8 61.e7 h4 62.Kd6?? (better is 62.Bd6!?–/+) 62...h3 (62...Bd4 63.Bd4 h3–+) 63.Kc7?? (63.Nf3–+) 63...h2 64.Kd8 h1Q 0–1. Chirpii,Alexandru (1925) – Dumitrascu,Grigore (1785), Iasi ROM, World Amateur Ch, 2013.

12.d3 Bd6 13.0–0 dc4 14.dc4 Qc7 15.Qc2 Rd8.

8.bc6 bc6

(--> 7...c5 8.bc6 bc6).

8.Nf3 Qa5

9.Bc3 Bb4 10.Be2 0–0 11.Bf6 gf6 12.bc6 Nc6 13.c3 Bd6 14.d4 e5 15.0–0 Be6 16.Nh4 Kh8 17.Bg4 Rg8 18.Bf5 Ne7 19.Be6 fe6 20.f4 ef4 21.ef4 Ng6 22.Ng6 Rg6 23.Qe2 f5 24.Qe3 b5 25.Nd2 b4 26.cb4 Qb4 27.g3 Qb8 28.Kh1 Kg8 29.Rb1 Qc7 30.Nf3 h6 31.Qe2 Kh7 32.Nh4 Rf6 33.Kg2 Bf8 34.Ra1 Bg7 35.Ra6 The backward pawn on e6 becomes a target 35...Qc8 36.Nf3 Qd7 37.Ne5 Qb7 38.Kh3 Qc8 39.Ra7 Qb8 40.Rd7 Qe8 41.Rb7 h5 42.Qa6 h4 43.Qa7 Qh8 44.Rf7 Rf7 45.Qf7 hg3 46.Nd7 Kh6? 47.Qe6+– Kh7 48.Qf7 Kh6 49.hg3 Bd4 50.Nf8 Qg7 51.Qf5 Ba1 52.Ne6 Qh8 53.Kg4 Qe8 54.Kh4 Qe7 55.Kh3 Qf6 56.Qd5 1–0. Fels,Bernhard (2030) – Mitrovic,Sinisa (1770), CP–2009–P–00047, 2009.

9.Bc3 Qb6 10.bc6 bc6 11.Be2 (11.Bf6 gf6 12.d4 Rg8=) 11...Be7 12.0–0 Ba6 (12...0–0 13.Ne5=) 13.d3 0–0 14.Nbd2 Nbd7 15.Qa1 Ra8 16.Rb1 Qc7 17.h3 (17.Ne5 Qd6=) 17...Bb7 (17...c5 18.Qb2=) 18.Qb2= Rb8 19.Nb3 Ba6 (19...c5 20.Ne5=) 20.Ba5 (20.Ra1 Bc8=) 20...Qd6 21.Qa1 (21.Bc3 c5=) 21...Bb5 (21...c5 22.c4=+) 22.Bc3 (22.c4 Ba6=) 22...Ne8 (22...c5 23.Ne5=) 23.Ne5 Bf6 (23...c5 24.Nd7 Qd7 25.Be5=) 24.f4 (24.Nd7 Bc3 25.Qc3 Qd7=) 24...c5= 25.Bf3 (better is 25.Bh5 Be5 26.fe5=) 25...d4 (better is 25...Qc7=) 26.ed4+– Be5 (26...cd4 27.Nd4 Ba6 28.Rb8 Nb8 29.Qa5+–) 27.de5 Qb6 28.Ba5 Qa7 29.Kh2 f6 30.Qc3 fe5 31.fe5 Qc7?? 32.Bc7 Nc7 1–0. Fredek (2090) – Cholerik, Freundschaftspartie, 5m + 0s, 2005.

9.Nc3 c5 10.Be2 Bd7 11.0–0 c4 12.d3 (better is 12.Ne5!?=) 12...Bb4–/+ (< 12...Bb5 13.Nb5 Qb5 14.dc4 dc4 15.Bf6 gf6 16.Qd4+/–) 13.Nd5 ed5 14.dc4 dc4 15.Bf6 gf6 16.Qd4 Bc3 (16...Bb5 17.Qe4 Kf8 18.Rb1–/+) 17.Qd6=+ Qd8 18.Rd1 Ba5 (18...Qc8 19.Bc4 Qc4 20.Qb8 Qc8 21.Qc8 Bc8 22.Rd3–/+) 19.Qg3 (better is 19.Bc4 Bc7 20.Qc5=) 19...Qe7?? (better is 19...c3=+) 20.Qb8+– Bd8 21.Qb7 Be6 (21...c3 22.Rd3+–) 22.Qc6 Bd7 23.Qc4 0–0 (23...Rg8 24.Qd3+–) 24.Qh4 Bf5 25.Bd3 Bg6 26.Nd4 Qb4 27.Qh6 Bc7 (27...Bd3 28.cd3 Re8 29.Qh3+–) 28.Nf5 (28...Bf5 29.Bf5 Bh2 30.Kh2 Qf4 31.ef4 Re8 32.Rd7 Re1 33.Qh7 Kf8 34.Qf7#) 1–0. Kreuzer,Uwe – Boudza, GER, 1990.

9.Nc3 Bd6=+ 10.Be2 0–0 11.0–0 Nbd7 (11...e5 12.Bb2=+) 12.Bb2 (12.bc6 bc6 13.Nd4 Ba6=) 12...c5 (12...e5 13.Qa1 Qc7 14.bc6 bc6 15.Ba3=+) 13.Qa1= Qc7 14.Qa7 (14.Qa2 b6=) 14...Nb6 (14...e5!?=+) 15.Na4= Na4 16.Qa4 (16.Bf6 Nb6 17.Bc3 Nd7=) 16...c4 (16...e5!? 17.b6 Qe7=) 17.Bf6+= gf6 18.d3 e5 (better is 18...cd3!? 19.Qg4 Kh8 20.cd3 Qc2=) 19.dc4+/– e4 20.Nd4 (20.Nd2 Bh2 21.Kh1 d4+/–) 20...Bh2 (20...dc4!? 21.Qc4 Bh2 22.Kh1 Qc4 23.Bc4 Be5+=) 21.Kh1+/– Qe5? (21...Be5 22.cd5 f5 23.Qc4+/–) 22.f4?? (better is 22.cd5 Kh8 23.Qc4+–) 22...ef3+/– 23.Nf3 Qe3 24.Nh2 Qe2 25.cd5 Re8 26.c4+/– Qe4 27.Qb3 Qh4 28.Qc3 Re5 29.Kg1 Rh5 30.Nf3+– Qg3 31.Qf6 Bf5?! 32.Re1 Qb8 33.b6 Qc8 34.Qd4 Bd7 35.c5 f6 36.Rc1 Qe8 37.Re1?? Qf7?? 38.c6!+– Bc8 39.d6 bc6 40.b7! Qb7 41.Re8 Kf7 42.Re7 (42...Qe7 43.de7 Ke7 44.Qe4 Kf7 45.g4+–) 1–0. Dziedzic,F – van Duske, corr ICCF EU–H–GT–8, 1975.

9.Nc3 Be7 10.Be2 0–0 11.0–0 =.

9.Nc3 Be7 10.Be2 Bd7 11.Ne5 0–0 12.Nd7 Nfd7 13.0–0 Rc8 14.Bb2 Bb4 15.Qa1 Qc7 16.Nb1 (16.Qa4 Bd6 17.Qh4 Ne5+=) 16...f6 (16...cb5 17.Bb5 Qc2 18.Bg7=) 17.c3 Bd6 18.f4 e5 19.g3 (19.fe5 fe5 20.c4 e4=) 19...Nc5 (19...e4 20.Bg4=) 20.Na3 (20.fe5 fe5 21.c4 e4=) 20...Re8 (20...e4 21.c4=+) 21.bc6 bc6 (< 21...Qc6 22.Bb5 Qc8 23.Qa2+/–; 21...Nc6?! 22.fe5 fe5 23.c4+=) 22.c4 (22.fe5 fe5 23.c4 Nbd7=) 22...d4 (22...ef4 23.gf4 Ne4 24.Qc1=+) 23.ed4 (23.fe5 fe5 24.Bh5 Re7=) 23...Nb3 (23...ed4 24.Bf3=+) 24.Qd1 (24.Qa2 Ba3 (24...ef4? 25.c5 Re2 26.Qb3 Qf7 27.Qf7 Kf7 28.cd6+–) 25.Qa3 A) 25...ed4? A1) < 26.Qb3 Re2 27.Bd4 Re8+/– (27...Rd2?? 28.Qe3 Qd7 29.Qd2+–); A2) 26.Bh5 g6 27.Qb3 gh5 28.Bd4+–; B) 25...Nd4=) 24...Nd4=+ 25.Bd4 ed4 26.Nc2 c5 27.d3 Nc6 28.Na3 Re3 29.Nb5 Qe7 30.Bf3 Nb4 31.Be4 g6 32.f5 gf5 33.Bf5 Bb8 34.Be4+/– Qg7 35.Rf3 Qg5?? 36.Rf5+– Qg6 37.Rc5 Rg3?? 38.hg3 Qg3 39.Kf1 Qf4 40.Qf3 Qc1 41.Kf2 Qd2 42.Kf1 Qc1 43.Kg2 Qd2 44.Qf2 Qg5 45.Rg5 (45...Kf7 46.Nd4 h6 47.Rf5 Kg7 48.Rf6 Bf4 49.Qf4 h5 50.Ne6 Kg8 51.Rf8) 1–0. pumpkin (2430) – sbwiik (2415), net–chess.com, 2004.

8.Nf3 cb5

9.Bb5 Nc6 10.0–0 Bd7 11.d3 Bd6 12.Nbd2 0–0 13.c4 dc4 14.Nc4 Nb4 15.Bd7 Qd7 16.Bf6 gf6 17.Qa1 Be7 18.Qc3 Nd5 19.Qa5 Bd8 20.Qa7 Be7 21.Rb1 Nc3 22.Rb7 Qd6 23.Nd6 1–0. Tranrovers – Nautiluschess, ICS blitz, 2000.

9.Bb5 Bd7 10.Nc3 Bd6 11.0–0 0–0 12.Qb1 Na6 13.Bd7 Qd7 14.Nb5 Bb8 (14...Be7 15.Ne5 Qc8 16.Rc1=) 15.Ne5 (15.Bf6 gf6 16.Qb2 Rc8+=) 15...Qe7 16.Qb2 (16.d3 Rc8=) 16...Qb4 (16...Rc8 17.Rc1=) 17.Nf3 Qb2 18.Bb2 Rc8 (18...Ne4 19.Rb1=) 19.Bf6 gf6 20.c3 Rc6 (20...Nc5 21.Rb1=) 21.Rb1 Nc5 22.Nbd4 Ra6 23.Kf1 Kf8 24.Ke2 Ke7 (24...Ra2 25.h3=) 25.Nc2 Kd6 26.d4 (26.Nfd4 Kd7+=) 26...Ne4= 27.Rb7 Bc7 (27...Nc3? 28.Kd3+–) 28.Nd2 Nc3 29.Kd3 Na4 (29...Nd1 30.f3 Rc6 31.Na1=) 30.Rb1 (30.e4 Rc6 31.Ne3 Rc3 32.Ke2 Kc6+=) 30...Rc6= 31.Rb3 Rb6 ½–½. Wasl,Ernst – Kotissek,Robert, Bayern, 1995. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.e3 cb5)

9.Bb5 Bd7 10.Qe2 Qa5 11.Bd7 Nbd7 12.Bf6 Nf6 13.0–0 =.

9.Bb5 Bd7 10.Qe2 Bd6 11.0–0 0–0 12.Nc3 (12.Rc1 Qe8 13.Bd7 Nbd7=) 12...Bb4 (12...e5 13.Bd7 Qd7 14.Rb1=) 13.Rb1 Bc3 (13...Qa5 14.Qd3=) 14.Bc3+= Ng4 (14...Ne4!?+=) 15.h3 Nh6 (15...Nf6 16.Bd7 Nbd7 17.Rb7+/–) 16.Ne5 (16.Bd7 Qd7 17.Qb5 f6+/–) 16...Nc6 17.f4 (17.Nd7 Qd7 18.Qh5 Nf5+=) 17...Ne5+= 18.Be5 (18.fe5 Qb6+=) 18...Bb5 (18...f6 19.Bc3+=) 19.Qb5 f6 20.Bc3 Qd7?? (better is 20...Rf7+=) 21.Qd7+– (21...Kh8 22.Rb7+–) 1–0. Fredek (2065) – Julios, Freundschaftspartie, 5m + 0s, 2006.

9.Bb5 Bd7 10.Be2 Nc6 11.0–0 Bd6 12.Nc3 e5 13.Nb5 Bb8 (13...Bg4 14.h3 Bf3 15.Bf3=) 14.Bb2 Bf5 15.Ba3 (15.d4 e4 16.Nd2 0–0=) 15...Ne7 (15...Qd7 16.d3=) 16.Qa1 (16.d4 e4 17.Ne5 Ng6+=) 16...0–0 (16...Bg4!?=) 17.Ne5+= Bc2 18.f4 Bf5 (18...Be4 19.d3 Bf5 20.Rb1+=) 19.Nd4 Bc8 (19...Bd6 20.Rc1+=) 20.Rb1 (20.Qb2 Bd6+=) 20...Ne4 21.Qb2 Nd6 22.Bb4 Re8 23.Bc5 Nef5 24.Nf5 Bf5+= 25.Ra1 f6 26.Nf3 Nc4 27.Qb7+/– Bg4 28.Ra8+– Nd2 29.Ba7 Ba7 30.Ra7 (30...Qd7 31.Qd7 (31.Nd2?! Qb7 32.Rb7 Be2+=) 31...Bd7 32.Nd2+–) 1–0. Waechtler,Frank (2290) – Lytchak,Alexander (2255), NRW–Liga I, 1994.

8.Nf3 Bd6

9.Nc3 0–0 10.Be2 Nbd7 11.0–0 e5 12.Qb1 Qc7 13.h3 e4 14.Nd4 Ne5 15.f4 ef3 16.Nf3 Nf3 17.Bf3 Be5 18.b6 Qe7 19.Re1 Re8 20.Re2 Ne4 21.d4 (21.Ne4 de4 Combination; 21.Be4 de4 Combination) 21...Bd6 22.Be4 de4 23.Qf1 (23.Qa2!?–/+) 23...Qg5–+ 24.Kh1 Qg3 25.Qg1 Bh3! 26.gh3 (26.gh3 Qh3 Decoy) 26...Qh3 27.Rh2 Qf3 (27...Bh2 28.Qh2 Qf3 29.Kg1 Qe3 30.Qf2 Qc1 31.Qf1 Qc2 32.Qe1–+) 28.Rg2 (better is 28.Qg2 Bh2 29.Qf3 ef3 30.Kh2 Re3 31.Kg3–/+) 28...Re6?? (better is 28...Qh5 29.Rh2 Bh2 (29...Qh2 30.Qh2 Bh2 31.Kh2–+) 30.Qh2 Qf3 31.Kg1 Qe3 32.Qf2 Qc1 33.Qf1 Qc2–+) 29.Qf2+= Qh5 30.Kg1 Rh6 31.Rh2?? (better is 31.Kf1 Qa5 32.Bb2+=) 31...Bh2–+ 32.Kf1 Rf6 33.Qf6 gf6 34.Ne4 Qf3 35.Nf2 Bg3 0–1. Karacsony,Istvan – Mihalecz,Attila (2120), HUN–chT2 Asztalos, 2003.

9.c4 0–0=+ 10.Be2 (10.Qc2 Nbd7=+) 10...dc4 11.Bc4 cb5 12.Bb5 Bd7 13.Bd7 (13.Qa4 Bc6=+) 13...Nbd7 14.0–0 b5 15.d4 (15.Qb3 b4=+) 15...Qa5 (15...Qa8 16.Nc3 Rb8 17.Qb3–/+) 16.Nbd2 Rc8 17.Qb1 b4 18.Bb2 (18.e4 Bf4=+) 18...Qa6 (18...Qd8 19.Rc1=+) 19.Rc1 Nb6 (19...Rc1 20.Qc1 Qe2 21.Qc6 Qd1 22.Nf1=) 20.Rc8= Qc8 21.Qc1 (21.e4!? Nfd7 22.Bc1=) 21...Qc1=+ 22.Bc1 Nfd5 (22...Nbd5 23.e4 Nc3 24.e5–/+) 23.Kf1 (23.Ne4 Be7=+) 23...Nc3 24.Bb2 (24.e4 Kf8=+) 24...f6 (24...Nd1 25.Bc1=+) 25.Bc3 (25.Ke1 Nca4 26.Bc1 Kf7=+) 25...bc3 26.Nb3 Nc4 (26...g5 27.g4=+) 27.Ke2=+ Nb2 28.Nc1 (28.e4 Kf7=+) 28...Bc7 (28...Bb4 29.e4=+) 29.Na2 Ba5 30.Ne1 Kf7 31.Nc2 Nc4 (31...g6!?=+) 32.Na1+= Nd2 33.Kd3 f5 (33...e5 34.f3+= (< 34.Nc3 Bc3 35.Kc3 Ne4 36.Kc4 Nf2=)) 34.f3 (< 34.Nc3 Bc3 35.Kc3 Ne4 36.Kd3 Nf2 37.Ke2 Ne4=) 34...Kg6 (34...Nf1 35.Nb3 (< 35.Nc3 Bc3 36.Kc3 Ne3=+) 35...Bc7 36.h3+/– (< 36.Nc3 Bh2 37.Nc5 Bg1+=)) 35.Nc3 (35.h3 c2+/–) 35...Nf1 (35...Bc3 36.Kc3 Nf1 37.Kd3+=) 36.Nb5+/– Nd2 (36...Nh2!? 37.Nb3 Bb4+/–) 37.Na7 Nf1 38.Ke2 (38.Nb3 Bb4+–) 38...Nd2 (38...Nh2!? 39.Nc6 Bc7+/–) 39.Nc6+– Nc4 (39...Bc3 40.Nc2+–) 40.Na5 (40.Nb3 Bc7+–) 40...Na5+/– 41.Nc2 Nc4 (41...Kf6 42.e4+/–) 42.e4+– Nb6 (42...f4 43.g3 Kg5 44.h4 Kh5 45.gf4 Kh4 46.Ne3+–) 43.Kd3 Kf6 (43...f4 44.g3+–) 44.Ne3 fe4 (44...g5 45.Nc4 Nd7 46.e5 Ke7 47.g4+–) 45.fe4 Nc8 (45...Nd7 46.e5 Ke7 47.Nc4+–) 46.e5 (46.Ng4 Kg5 47.Ne5 Nd6+–) 46...Kf7 47.Kc4 Ke7 (47...h5 48.Kc5+–) 48.Kc5 Kd7 49.Nc4 Ne7 50.Nb6 Kc7 (50...Ke8 51.d5+–) 51.d5 Kd8 52.Kd6 (52.de6 h5+–) 52...ed5 53.Nd5 Nf5 (53...Nc8 54.Ke6 Ke8 55.Nc7 Kd8 56.Nb5+–) 54.Ke6 Nh6 55.Ne3 Ke8 (55...g6 56.Kf6 Ng8 57.Kf7+–) 56.Nf5 Ng4 (56...Nf5 57.Kf5 Ke7 58.g4+–) 57.h3 (57…Nf2 58.Ng7 Kf8 59.Nf5+–) 1–0. Mehlhorn,U – Floegel,O, BFM–199, 2001.

9.bc6 bc6 10.Be5 0–0 11.Nc3 Ng4 12.Bd6 Qd6 13.h3 Ne5 14.Ne5 Qe5 15.d4 Qg5 16.h4 Qg6 17.g3 f5 18.Qf3 Na6 19.Qf4 Nb4 20.Kd2 Qg4 21.Qd6 Qf3 22.Rh2 f4 23.gf4 c5 24.Be2 cd4 25.Bf3 dc3 26.Kc3 Na6 27.Be2 d4 28.ed4 Nb8 29.Qb8 Ba6 30.Qd6 Be2 31.Qe6 Kh8 32.Qe2 h5 33.Qh5 Kg8 34.Rg2 Rf4 35.Rg7 Kg7 36.Qg5 Kh7 37.Qf4 Kh8 38.Qg5 Kh7 39.f4 Kh8 40.f5 Kh7 41.f6 Kh8 42.Qg7# 1–0. marus1 – ChesReactor, internet, 2001.

9.Be2 0–0 10.0–0 cb5 11.Bb5 Bd7 12.Nc3 Nc6 13.Ne2 Re8 (13...Qe7 14.c4+=) 14.Bc6= bc6 15.Be5 Ne4 16.d3 f6 17.Ba1 (17.Bd6!? Nd6 18.Qa1+=) 17...Nc5–/+ 18.Ng3 e5 19.Qd2 Qc7 20.Rd1 Bg4 21.h3 (21.d4 ed4 22.Bd4 Ne4–/+) 21...Bf3 22.gf3 Qd7 23.Kh2 Ne6 24.Rg1?? (better is 24.h4–/+) 24…Ng5–+ (24...Ng5 25.Nf5 Nf3 26.Kg2 Nd2 27.Nd6 Rb8–+) 0–1. guillaume54 (1785) – omnipotent00 (2015), gameknot.com, 2014.

9.Be2 0–0 10.0–0 Nbd7 11.c4 (11.Nc3 e5=) 11...Nb6 (11...dc4 12.Bc4 Nb6 13.d3=) 12.d3= cb5 13.cb5 Bd7 14.Qb3 Qe7 15.Bd4 Bc5 16.Bc5 Qc5 17.d4 Qc7 18.Ne5 Rc8 19.Bd3 Be8 (19...Ne4+=) 20.g4 (20.Nd2 Nfd7 21.Nd7 Bd7+=) 20...Nfd7 (20...Nbd7 21.Nd7 Bd7 22.b6–/+) 21.f4 Ne5 22.fe5 Nc4 23.Rc1 Qa5 24.Qc2 (24.Na3 Qd2 25.Qb1 Qe3 26.Kg2 Qd4–+) 24...g6 (24...h6 25.g5 hg5 26.Qg2–/+) 25.Qf2 Bb5 26.h4 (26.e4 Qd8 27.Bc4 Qg5–/+) 26...Qd8 27.Nc3 Be8 (better is 27...Nd6 28.Bb1 Qa5–/+) 28.Rb1? (better is 28.e4=+) 28...Ne5!–+ 29.de5 Rc3 30.Qd2 Rc8 (30...Qc7 31.h5–+) 31.g5 Qc7 32.h5 Qe5 33.hg6 Qg5 34.Kf2 fg6 35.Rb7 Bc6 36.Rb4 Rf8 37.Ke2 Qh5 38.Ke1 Qh1 39.Ke2 Qf1# 0–1. Farleigh,Richard – Guevara,Martin (2335), Moscow ol (Men), 1994.

9.Be2 0–0 10.0–0 Re8 11.Be5 Be5 12.Ne5 Qd6 13.f4 Nfd7 14.d4 f6 15.Bd3 f5 (15...Nf8 16.Nf3+=) 16.c4 Ne5 17.c5 Qe7 18.fe5 (worse is 18.de5 Qc5 19.Qd2 cb5–/+) 18...Qg5 (18...b6 19.cb6 c5 20.Nc3+=) 19.Rf3 h5 (19...cb5!? 20.Bb5 Nc6+/–) 20.Rh3 g6 21.Rg3 Qh6 22.h4 (22.b6 h4 23.Rf3 g5+–) 22...Kf7 23.Nc3 Rg8 24.Rg5 Qf8 25.Qa4 Bd7 26.Qa7 Qc8 27.Qb6 (27.b6 Kg7+–) 27...Rg7 28.Qa5 cb5 29.Bb5 Nc6 30.Qa1 Qb8 31.Be2 b6 32.cb6 Qb6 33.Bf1 Rg8 34.Rg3 Rc8 35.Qa3 (35.Ne2 Qa5 36.Qd1 Ne7+=) 35...Na5 (35...Nd4 36.ed4 Qd4 37.Kh1 Qh4 38.Rh3+=) 36.Na4 Ba4 37.Qa4 Qc7 38.Rf3 Nc4 39.Bc4 dc4 40.e4 c3 41.Qc2 (41.Rc3! Qc3 42.Qd7 Kf8 43.Qd6 Kg7 44.Qe7 Kh6 45.Qg5 Kh7 46.Qe7 Kg8 47.Qe6 Kh7 48.Qe7 Kh6 49.Qg5 Kg7 50.Qf6 Kh6 51.Qg5 Kg7 52.Qf6 Kh6 53.Qg5=) 41...Qc4–/+ 42.ef5? (better is 42.d5 Qd4 43.Kf1 Qe5 44.de6 Ke6 45.ef5 gf5 46.Qc1–/+) 42...Qd4–+ 43.Kf1 gf5?? (better is 43...Qc4 44.Kg1 gf5–+) 44.Rf5= ef5 45.Qf5 Ke7 46.Qf6 Kd7?? (better is 46...Ke8 47.Qh8 Ke7 48.Qf6 Ke8 49.Qh8 Ke7 50.Qf6=) 47.e6+– Kd6 48.Qd4 (48.Qd4 Ke6 49.Qe4 Kd6 50.Qg6 Kd7 51.Qf5 Kd8 52.Qh5+–) 1–0. Dias Da Silva,Adriano (1995) – Nikolic,Jovane (1690), Sao Paulo BRA, 3rd IRT Open, 2013.

9.Be2 0–0 10.bc6 Nc6 11.Nc3 +=.

9.Be2 Qa5 10.Bc3 Bb4 11.bc6 bc6 12.0–0 Bc3 13.Nc3 Ba6 14.Ba6 Na6 (14...Qa6!? 15.e4 de4=) 15.Qa1+= Qb6 (better is 15...Qa1!? 16.Ra1 Nb8+=) 16.Rb1+– Qa7 17.Nd4 0–0 18.Nc6 Qa8 19.Ne7 Kh8 20.Qa3 Nc7 21.Qa8 Ra8 22.Nc6 Nfe8 23.g3 h6 24.Rb8 Rb8 25.Nb8 g6 26.Kf1 Nd6 27.Ke2 Kg7 28.d3 g5 29.Nc6 f5 30.Nd4 Kf6 31.f4 Kg6 32.Nf3 Nf7 33.Kd2 Kf6 34.Ne2 g4 35.Nfd4 Nd6 36.Nb3 Ncb5 37.Ned4 Nd4 38.Nd4 h5 39.Kc3 Ke7 40.Kb4 Kd7 41.Nb5 Nf7 42.c4 dc4 43.Kc4 e5 (43...Nd8!?+/–) 44.Kd5+– ef4 45.ef4 (45.gf4?! h4 46.Nd4 g3 47.hg3 hg3+/–) 45...Ke7 46.Nd4 Kf6 47.Nc6 Nh8 (47...Nh6+–) 48.Ne5 Ke7 49.d4 Kf6 (49...h4 50.gh4 Kf6 51.h5+–) 50.Kd6 (50.Kd6 h4 51.gh4+–) 1–0. vhilts (2375) – tomy (2420), net–chess.com, 2016.

9.Be2 Nbd7 10.c4 0–0 11.0–0 cb5 12.cb5 e5 13.Nc3 e4 (13...Qc7 14.h3+=) 14.Nd4= Nb6 15.Na4 Bd7 16.Nb6 Qb6 17.Qb3 Ra8 18.Bc3 Ra3 19.Qb2 Qa7 20.b6 Qa4 21.h3 Be5 (21...Bc5 22.Rc1+=) 22.Bb5= Bb5 23.Nb5 Rb3 24.Qa1 Qb5 25.Be5 Ne8 26.Rc1 Qb6 27.Bd4 (27.Bg7 Qa6=) 27...Qb5 (27...Qd8 28.Qa2 Rb5 29.d3+=) 28.Qa2 (28.Bg7 Qa6=) 28...Rb4 (28...f6!?+=) 29.Rc5= Qd7 30.Rd5 Qc8 (30...Rb1 31.Kh2 Qc7 32.Be5 Qc6+–) 31.Re5 Nf6 32.Rc5 (32.Rc5 Qb8 33.Qc2+–) 1–0. pcmvr – cadam (2790), net–chess.com, 2016.

9.Be5 0–0 10.d4 Be5 11.de5 Ne4 =.

9.Be5 0–0 10.Be2 Be5 11.Ne5 Nbd7 12.Nf3 e5 13.0–0 (13.d4 e4 14.Nfd2 Qb6=) 13...e4 14.Nd4 Ne5 (14...c5 15.Nb3=) 15.f4 Nc4 (15...ef3!? 16.Nf3 Nf3 17.Bf3 Re8=) 16.bc6+= bc6 17.Nc6 Qc7 18.Nd4 Ba6 19.Qe1 Qd7 (19...Rb8 20.Nc3+=) 20.Qf2 Qc8 (20...Rb8 21.Nc3+=) 21.Qg3+/– Nd6 22.Nc3 Be2 (23.Nce2 Nc4+=). pcmvr (2225) – petrus (2260), net–chess.com, 2006.

9.Be5 Be5 10.Ne5 Nbd7 11.Nd7 Nd7 12.Qg4 0–0 13.c4 e5 14.cd5 cd5 15.Nc3 Nb6 16.Qb4 d4 17.Ne4 de3 18.de3 Nd5 19.Qd2 Bf5 20.Ng3 Be6 21.Be2 Qb6 22.0–0 Rc8 23.Rc1 Rc1 24.Qc1 Qc7 25.Qc7 Nc7 26.Ne4 b6 27.Kf1 Kf8 28.Ke1 Ke7 29.Kd2 (29.Nc3 f5=) 29...f5 (29...Bd5!? 30.Ng5 Bg2 31.Nh7 f6–/+) 30.Nc3= Nd5 31.Na4 Kd6 32.Bc4 Kc7 33.Nb2 Kd6 34.f3 Kc5 35.e4 fe4 36.fe4 Nc7 Attacks the isolani on b5 37.Be6 (better is 37.Kc3!? Bc4 38.Nc4 Nb5 39.Kd3=) 37...Ne6–/+ 38.Nd3 (better is 38.Ke3!?–/+) 38...Kd4–+ (38...Kb5?! 39.Ne5 Kb4 40.g4=) 39.Nb2 Nc5 40.Kc2 Ke4 (40...g5 41.g4–+) 41.Nc4 Nd7 42.Kc3 Kd5 43.Kb4 Kd4 44.Nd6 e4 45.Nf5 Kd3 0–1. Plantet,Marc (1910) – Baron,Daniel (2185), Montigny le Bretonneux op 1st, 2002.

8.Nf3 Bd7

9.Nc3 Bd6 10.Qb1 0–0=+ 11.Be2 (11.Ne2 Re8=+) 11...c5 (11...e5 12.0–0=+) 12.0–0 (12.Qa2 Qc7=) 12...c4 (12...e5 13.d3=+) 13.d3 cd3 14.cd3 Qb6 (14...e5 15.b6=) 15.h3 (15.Rc1 Rc8+=) 15...Rc8 (15...Rd8 16.Qa2=) 16.Rd1 (16.Rc1 Be8=) 16...h6 (16...e5 17.Qb3=) 17.d4 (17.Rc1 e5=) 17...Be8 (17...Qa5 18.Qb3=) 18.Na4 (18.e4 de4 19.Nd2 Bf4 20.Nde4 Nbd7+=) 18...Qd8 (18...Qa5 19.Nc5 Bc5 20.dc5=) 19.Qb3 (19.Bd3 Nbd7=) 19...Nbd7 20.Bb2 (20.Bd3 Kh8=) 20...Nb6 (20...Qe7 21.Nc3=) 21.Nb6 Qb6 22.Rc1 Rc1=+ 23.Bc1 Ne4 24.Nd2? Nd2?? 25.Bd2= Kf8 26.Bd3+= Ke7 27.Bb4 Bd7 28.Qc3 Qc7?? 29.Qc7+– (29...Bb4 30.b6+–) 1–0. Fredek (2090) – Guest441072, Freundschaftspartie, 5m + 0s, 2005.

9.Nc3 Bd6 10.Be2 0–0 =+.

9.bc6 Nc6 10.Ne5 =.

9.Ne5 Be7 10.Be2 cb5 11.Nd7 Qd7 12.Nc3 b4 13.Nb5 0–0 14.0–0 Nc6 15.f3 Ra8 16.Qb1 Ra4 17.Nd4 Qc7 18.Nb3 Ra8 19.f4 Ne4 20.Bd3 Qd8 21.Be4 de4 22.Kf2 Qd5 23.Kg1 Na5 24.Na5 Ra5 25.Bd4 f6 26.Rd1 Ra2 27.d3 Ra3 28.Bb2 Ra8 29.de4 Qe4 30.Rd3 Bc5 31.Kh1 e5 32.fe5 fe5 33.h3 h6 34.Qe1 Ra6 35.Qg3 Rg6 36.Qf2 Rf6 37.Qe2 Kh7 38.Qg4 Qg4 39.hg4 e4 40.Rd7 Rg6 41.Bd4 b6 42.Kh2 Bd4 43.Rd4 ½–½. Luzuriaga,Norberto Horacio – Nittschalk,Karl, Tiger SC, 1999.

9.bc6 bc6

10.c4 Bd6 11.Bd3 0–0 12.Qc2 h6 (12...Na6 13.Be5 Nb4 14.Qc3+=) 13.c5 Bc7 14.0–0 Qe7 15.Ne5 Bc8 16.f4 Nbd7 (16...Nfd7 17.Nd7 Nd7 18.Bd4=) 17.Nc6+= Qc5 18.Rc1 Bd6 19.Bd4 ½–½. Tselkovskiy,Kirill (2025) – Galaktionov,Artem (1940), Lazy Poland, 9th Baltic Pearl Open, 2013.

10.c4 Bd6 11.d4 Bb4 12.Bc3 (White is in command) 12...Qa5 (12...Bc3 13.Nc3 Qa5 14.Qd2=) 13.Qb3 Bc3 (13...c5 14.Bb4 Qb4 15.Nbd2=) 14.Qc3+= Qa2 15.Nfd2 (15.Bd3 dc4 16.Qc4 Qc4 17.Bc4 Ke7+=) 15...0–0 16.Bd3 c5? (better is 16...Na6+=) 17.Na3+– (17.dc5?! Na6 18.cd5 Nc5+=) 17...cd4 (17...dc4 18.Bb1 Nd5 19.Qc1+– (19.Ba2 Nc3 20.Bc4 cd4=+)) 18.ed4 dc4 19.Bb1 Nd5 20.Qh3 Qb2 21.Qh7# 1–0. b4_player – opponent, gamecolony.com, 2007.

10.c4 Bd6 11.d4 Bc8 12.c5 Bc7 13.Nc3 =.

10.c4 Bd6 11.Be2 =.

10.c4 Be7 11.Be5 0–0 12.d4!? =.

10.c4 Be7 11.Be5 0–0 12.g4 Ng4–/+ 13.Bg7 Nf2?? (better is 13...Kg7 14.Rg1 f5–/+) 14.Rg1+– Re8 (14...Bg5 15.Kf2 Kg7 16.Ng5+–) 15.Bh6 Kh8 16.Ne5 (16.Kf2?! Bh4 17.Ke2 Rg8 18.Rg8 Kg8+–) 16...Nd3 17.Bd3 Bh4 18.Ke2 Qf6 19.Bg7 (19...Qg7 20.Rg7 Kg7 21.Qg1 Kf6 22.Qg4+–) 1–0. Medl – Radetzky, corr Hungary, 1985.

10.Be2 c5 =.

8.Nf3 Nbd7

9.c4 dc4 10.Bc4 c5 11.0–0 Be7 (11...Bd6 12.d4+=) 12.Qb3 (12.d4 0–0+=) 12...0–0 (12...b6 13.Ne5=) 13.d3 (13.d4 b6+=) 13...Nb6 (13...b6 14.Rd1=) 14.Nbd2 (14.Rd1 Qd7+=) 14...Nc4 (14...Nfd7 15.Qc3 Nf6 16.Rd1+=) 15.Nc4 Qd5 16.e4 Qh5 17.Be5 Rd8 (17...Ng4 18.Bc7+=) 18.Ra1 Ne8 (18...Nd7 19.Bc7 Rf8 20.Ra8+/–) 19.Nb6+/– Bd6 (19...Bd7 20.Ra7 Qh6 21.Bb2+/–) 20.Bg3 (better is 20.Bd6!? Nd6 21.e5+– (21.Nc8?! Nc8 22.Qc2 Nb6+=)) 20...Bg3+= 21.hg3 White threatens.... what? 21...Nc7 22.Ra7 (22.Nc8?! Rc8 23.Qa4 h6=) 22...Qh6? (better is 22...h6+/–) 23.Qc4+– (23.Nc8?! Qc1 24.Kh2 Qh6 25.Nh4 Rc8=) 23...Nb5 24.Qb5 (24.Ra8 Nc7 25.Rc8 Rc8 26.Nc8 Na6+–) 24...Qc1 25.Kh2 Qh6 26.Nh4 g5 27.Qc5 gh4 28.gh4 Qh4 29.Kg1 Bd7 30.Rb7 Be8 31.g3 Qf6 32.e5 Qf3= With the decisive threat Bc6 33.Qe7 Qd1 34.Kh2+/– Qh5 35.Qh4 Qh4 36.gh4 Rd3 37.Rb8 Kf8 38.Nc4 Ke7 39.Nd6 Bc6 40.Rb6 Rc3 41.Ra6+/– f6 42.f4 fe5 43.fe5 Bd7 44.Ra7 (44.Ra5 Rd3+=) ½–½. Mittelbachert,Ulrich – Sinnwell,Horst, Ruhrgebiet, 1998. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.e3 Nbd7)

9.c4 Be7 10.bc6 bc6 11.d4=.

9.Bd4 c5 10.Bc3 c4 11.d3 cd3 12.Bd3 Qc7 13.0–0 e5 14.b6 Qd6 15.Bb5 Qb6 16.Bd7 Bd7 17.Ne5 Qe6 18.Nd7 Nd7 19.Nd2 f6 20.Qf3 Be7 21.Rb1 b6 22.Qh5 g6 23.Qh6 Bf8 24.Qh4 Be7 25.Qh6 Kf7 26.Nf3 Bf8 27.Qf4 Kg7 28.Nd4 Qf7 29.Qg4 h5 30.Qh3 Kg8 31.Rb5 Nc5 32.Rb6 Bg7 33.Qc8 Bf8 34.Rb5 Ne4 35.Rb7 Nd6 36.Rf7 Nc8 37.Rf6 Kh7 38.Ne6 Be7 39.Rf7 Kg8 40.Rg7# 1–0. Trkn – AVN, internet, 2001.

9.Be2 Qa5 10.Bc3 Qa4 11.0–0 cb5 12.Bf6+= Nf6 13.Nc3 Qa5 14.Bb5 Bd7 15.Bd7 Nd7 16.Qb1 Qc7 17.Qb2 Be7 18.Rb1 b6 19.Nb5 Qb8 20.Qg7+– Bf6 21.Qg3 Qg3+= 22.hg3 Ke7 23.Nfd4 Bd4 24.Nd4 Ra8 25.Kf1 e5 26.Nc6 Kd6 27.Nb4 f5 28.Ke2 e4 29.Rh1 Nf6 30.Rh6 Rf8 31.c3 Kc5 32.Nc2 Rf7 33.Nd4 b5 34.Ne6 Kc4 35.Nf4 Kb3+/– 36.Ne6 b4 37.cb4 Kb4 38.Ng5 Rf8 39.Nh7+– Nh7 40.Rh7 Kc4 41.Rh6 Rf7 42.Rg6 d4 43.ed4 Kd4 44.f3 Re7 45.Kf2 Rd7 46.Ra6 Rd5 47.Ra4 Kd3 48.Ra2 Re5+/– 49.f4 Rc5 50.g4+– fg4 51.Kg3 Rc2 52.Rc2 Kc2 53.f5 Kd2 54.f6 e3 55.f7 e2 56.f8Q e1Q 57.Qf2 Qf2 58.Kf2 Kd3 59.Kg3 Ke4 60.Kg4 (60...Ke5 61.Kg5+–) 1–0. Jorgensen,Christer – Stark,Ingvar, Vaxjo tt, 1994.

9.Be2 Qa5 10.Bc3 Qc7 11.0–0 Bd6 12.bc6 bc6 13.d3 0–0 14.Qd2 e5 15.Ba5 Qa7 16.Qc3 e4 17.Nfd2 ed3 18.cd3 c5 19.Nf3 Re8 20.Na3 d4 21.Qd2 de3 22.fe3 Ba6 23.Nc2 Nd5 24.Nh4 g6 25.Kh1 Ne5 26.e4 Nb4 The pressure on the backward pawn d3 grows 27.Bb4 cb4 28.Ne3 Be7 29.Nf3 Nf3 30.Rf3 (30.Bf3? Bg5 31.Re1 Rd8–+) 30...Bg5 31.Bd1 Bc8 32.Bb3 Attacking the backward pawn on f7 32...Be6 33.Be6 Qa1 34.Qd1 Qd1 35.Nd1 Re6 36.Rf1 (36.g4 b3 37.Kg2 Bf6–/+) 36...b3 (36...Rd6 37.Nb2–/+) 37.Nb2 Bf6 38.Rb1 Ra6 39.h3 Ra2 40.Nc4 b2 41.Kh2 Ra1 42.Rb2 Bb2 43.Nb2 Ra3 44.d4 Re3 45.e5 Kf8 46.Kg1 Rc3 0–1. Cottarelli,Franco (1890) – Morais,Gustavo JFS (2320), VWC3/pr17 ICCF, 2010.

9.Be2 Qa5 10.Bc3 Qc7 11.Bb2 e5 =.

9.Be2 Qa5 10.Bc3 Qc7 11.Nh4 Bd6 12.f4 0–0 13.0–0 (13.Nf3 e5 14.fe5 Ne5 15.Be5 Be5=) 13...Ne4 14.Bb2 f5 (14...cb5 15.Bb5 Qc5 16.Qg4=+) 15.d3 (15.Nf3 cb5 16.Bb5 b6=) 15...Nef6 16.Qd2 (16.Na3 Qb6 17.Bd4 c5=) 16...c5 (16...Qb6 17.Ba3 c5 18.Nc3=) 17.Na3 g5 18.b6 (18.fg5 Bh2 19.Kh1 Ng4=) 18...Qb8 (18...Qb6 19.Bf6 Nf6 20.fg5=) 19.Nf3 (19.fg5 Bh2 20.Kh1 Ng4 21.Bg4 fg4 22.Rf8 Nf8+=) 19...gf4 20.Nb5 Ng4 (20...Nb6!? 21.Nd6 Qd6 22.ef4 d4=) 21.Nd6 Qd6 22.ef4 Qb6 23.Rb1 Qc7 24.Ng5 Qd6 25.d4 c4 26.Bc3+= h6 27.Bb4 Qb6 28.Nf3 Rf7 29.Qe1 Kh7 30.Bd2 Qa7 31.Bf1 Re7 32.Qh4 Ngf6 33.Re1 Re8 34.Ng5 Kg6+= 35.Ne6 Qb6 36.Qg3 Ng4 37.h3 Re6= 38.hg4 Re1 39.gf5 Kf5 40.Be1 Nf6 41.Qh3+= Ng4 42.Qh5 Kf6 43.Qd5 Be6 44.Qe4 Bf5 45.Bh4 Kg6 46.Qe8 Kg7 47.Qe7 Kg6 48.Bf2 Qe6 49.Qb7 Nf2 50.Kf2 Qd6 51.c3 Qf4 52.Qf3 Qd2 53.Kg3 Bd3 54.Bd3 cd3 55.Qe4 Kf7 56.c4 Qc3 57.Kf2 ½–½. pcmvr (2225) – petrus (2270), net–chess.com, 2006.

9.c4 Qa5

10.Bc3 Bb4=.

10.Nc3 Bb4 11.Qb1 0–0=+ 12.Be2 Ne4 13.Qb2 (13.Qc1 cb5 14.cd5 Bc3 15.Bc3 Nc3 16.Qc3 b4=) 13...Nc3=+ 14.dc3 Be7 15.0–0 Bf6 16.Nd4 (16.Qb4 Qa2 17.Bd3 Re8=) 16...Qc7=+ 17.Qa3 (17.Rd1 Rd8=+) 17...c5 (17...Rd8 18.Qa7 Ne5 19.c5=+) 18.Nf3 b6 (18...dc4 19.Bc4 b6 20.Qa4=+) 19.cd5= ed5 20.c4 Bb7 21.Bf6 (21.Qb3 Ra8 22.Bf6 Nf6=) 21...Nf6 22.Nd2 (22.Rd1 Ra8 23.Qc3 Qe7=) 22...Rd8 23.f3 (23.Ra1 d4=) 23...d4=+ 24.e4 (24.Qd3 Nd7=+) 24...d3 25.Bd1 Nh5 (25...Qf4 26.Qa7 Qd2 27.Qb7 Qe3 28.Kh1=+) 26.Qc3 Qd6 27.Nb3 Nf4 28.Rf2 g5 29.Rd2= Ng6 30.Bc2 Ne5 31.Bd3 Nd3 32.Nc1 Qf4 33.Rd3 Rd3= 34.Nd3 Qe3 35.Kf1 g4 36.Qc2 gf3 37.gf3 Qf3 38.Nf2 Bc8 39.Qd3 Qf6 40.Qg3 Kf8 41.Qb8 Qd8 42.Ke1+= Ke8 43.Qe5 Be6=+ 44.Nd1 Qd3 45.Qb8 Ke7 46.Qc7 Kf6 47.Qf4 Ke7 48.Ne3 Bc4 49.Qc7 Kf8 50.Qb8 Kg7 51.Qe5 Kf8 52.Qb8= ½–½. Staszko,Tadeusz – Vandorffy,Jozsef, corr ICCF EU–M–143, 1966.

10.Nc3 Bb4 11.bc6 bc6 12.Nd4 c5=.

10.Nc3 Bb4 11.cd5 cd5 12.Be2=.

10.Nc3 Bb4 11.cd5 ed5 12.Nd4 c5 13.Nc2 0–0 (13...Nb6 14.Nb4 Qb4 15.Na2=) 14.Nb4 cb4 15.Na4 Ne4 16.Bd3 (16.Be2 Nd6=) 16...b6 (16...Ndc5 17.Nc5 Nc5 18.Be2=) 17.0–0 g6 (17...Re8 18.Qc2=) 18.Qb3+= Nd2 (18...Bb7 19.Rb1+=) 19.Qb2 f6 20.Qd2 Qa4 21.Be2 Bb7 (21...Qb3 22.Bd1 Qc4 23.Bf3+=) 22.Bd4+= Rc8 23.Rc1 Rc1 24.Qc1 Qa2 25.Bf1 Nc5 26.Bf6 b3 27.Bb2 Na4 28.Bd4 (28.Qc7 Qb2 29.Qb8 Kg7 30.Qb7 Kh6+/–) 28...Qc2 29.Qa3 Nc5 30.f3 Qa2 31.Qb4 (< 31.Bc5 bc5 32.Qc5 b2=) 31...Qc2 32.Ba1 Nd3 33.Bd3 (33.Qh4 b2 34.Bb2 Nb2 35.Qd8 Kf7 36.Qd7 Kf8 37.Qb7 Nd1 38.Qb8 Kf7 39.Qf4 Kg8=) 33...Qd3 34.Bd4 Qd1 35.Kf2 Kf7 (35...Qc2 36.Kg3 Qc7 37.f4+/–) 36.Kg3 (36.Bb6 Qc2 37.Kg3 b2–/+) 36...Qc1 (36...g5 37.h3 Ke6 38.Qf8 Qe1 39.Kh2+–) 37.h3 (37.Qb3?! Qe1 38.Kh3 Bc8 39.g4 Qf1 40.Kg3 Qg1 41.Kh3 Qf1 42.Kg3 Qg1 43.Kh3 Qf1=) 37...Qc7 38.f4 Bc8 39.Qb3 Qc4 40.Qb2 Qc7 (40...Bd7 41.Bh8 (< 41.Bb6 Qb5 42.Qd4 h6+/–) 41...Bb5 42.Qg7 Ke6 43.Qg8 Kf5 44.Qh7+–) 41.Qa2 Ke6 (41...Qb7 42.e4 Ke6 43.e5+–) 42.Qa8 Qb7 43.Qb7 (43.Qa3 Bd7 44.Be5 Bb5 45.Qd6 Kf5+–) 43...Bb7 44.Bb6 Kf7 (44...Kd6 45.Bd4+–) 45.Bd4 Bc8 46.Kh4 h6 47.g4 Bd7 (47...Ke7 48.Bg7+–) 48.b6 Bc8 49.f5 Bb7 (49...Ba6 50.Kg3+–) 50.fg6 (50.Kg3 g5+–) 50...Kg6 51.Kg3 Kf7 52.Kf4 Kg6 53.h4 Kf7 54.h5 Bc8 (54...Kg8 55.Ke5+–) 55.g5 hg5 (55...Ba6 56.g6 Ke6+–) 56.Kg5 Kg8 57.Kg6 Ba6 58.h6 (better is 58.e4 Kf8 59.h6+–) 58...Kf8 59.h7 Bd3 (59...Ke7 60.h8Q Bd3 61.Kg7 Kd7 62.b7 Be2 63.Qc8 Kd6 64.b8Q Ke7 65.Qe5#) 60.Kf6 (60...Ke8 61.h8Q Kd7 62.b7 Kc6 63.b8Q Bf5 64.Qhe8 Bd7 65.Qb6#) 1–0. Mehlhorn,U – Kraft,G, BFH–074, 2001.

10.Nc3 Bd6 11.Be2 0–0 12.0–0.

10.Nc3 e5 11.Be2=.

10.Nc3 Nb6

11.bc6 dc4 12.Be2 =+.

11.bc6 bc6 12.cd5 ed5 13.Be2 Bd6 =.

11.bc6 bc6 12.Ne5 Bb7 13.cd5 ed5 14.f4 =.

11.bc6 bc6 12.Ne5 Bd7 13.Be2 Bd6 14.f4 0–0 15.0–0 Ra8 (15...Rb8 16.d3=) 16.g4 (16.Qc2 dc4 17.Bc4 Be5 18.fe5 Ng4=) 16...Be8 (16...dc4 17.Bc4 Nc4 18.Nc4=) 17.Qe1 (17.g5 Be5 18.fe5 Nfd7 19.cd5 cd5=) 17...Na4 (17...dc4 18.Bf3=+) 18.Na4 (18.g5 Ne4 19.Ne4 de4=) 18...Qa4 19.g5 Ne4 20.d3 Bb4 21.Qh4 (21.Qd1 Qd1 22.Rd1 Nc3 23.Bc3 Bc3=) 21...Nd6 (better is 21...Nd2!? 22.g6 hg6–+ (22...Nf1?? 23.gh7 Kh8 24.Ng6 fg6 25.Bg7 Kg7 26.h8Q Kf7 27.Q4h7)) 22.Qf2=+ Qc2 (22...Bc5 23.d4 Ba3 24.c5=+) 23.Bg4= Qf2 24.Kf2 dc4 (24...Ra2 25.Kf3=+) 25.Nc4= Nc4 26.dc4 c5 27.Be5 Ra2 28.Kg3 Ba4 (28...Bc6 29.Rd1 Rg2 30.Kh3=) 29.Ra1 ½–½. Spassky,Boris – Smyslov,Vassily, Leningrad–Moscow, 1960.

11.cd5 cd5 12.Bd3 Bd6 =.

9.c4 Bd6

10.Nc3 e5 11.d4 =+.

10.d4 Bb4 11.Bc3 Be7 +=.

10.d4 Bb4 11.Nbd2 Qa5 12.bc6 bc6 13.Bd3 Ne4 14.Ke2 (14.Be4? de4 15.0–0 ef3 16.Nf3 0–0–+) 14...Nd2 15.Nd2 c5 (15...Ba6 16.Bb2=+) 16.Nb3 (16.Qc2 Qa8=) 16...Qa8 17.cd5 cd4 (17...Qd5 18.dc5 Qh5 19.f3 Nc5 20.Nc5 (20.Bg7? Qg5 21.Bb5 Ke7–+) 20...Bc5 21.Qa4 (21.Bg7 Qg5 22.Bb5 Ke7=+) 21...Ke7 22.Rc1+= (< 22.Bg7 Qg5 23.Bh8 Qg2 24.Ke1 Qh1 25.Bf1 Qh2–/+)) 18.Bd4 (18.de6!? fe6 19.Nd4+= (< 19.Bd4 e5 20.Bb2 Qg2=)) 18...e5= 19.Bb2 Qd5 20.Qc2 Ke7 21.f3 Nc5 (21...Bb7 22.Bc3 (22.Bh7? g6–+) 22...Bc3 23.Qc3=) 22.Nc5+= Bc5 23.Ra1 (< 23.Bh7 Rh7 24.Qh7 Ba6 25.Ke1 Qc4=+) 23...Bd7 (better is 23...Be6!?+=) 24.Ra5+– Rc8 25.Ba3 (25.Bh7?! g6 26.Qc3 Kd6=) 25...Kd6? (better is 25...Ba3 26.Rd5 Rc2 27.Bc2 Bd6+–) 26.Be4 (26.Bh7?! Be6+/–) 26...Ba4 27.Ra4 (27.Bd5?! Bc2 28.Bf7 e4+/–; 27.Qa4 Qa2 28.Ke1 Qa1 29.Kf2 Qa2 30.Kg3 Qe2+–) 27...Ba3 28.Qc8 (28...Qb5 29.Rc4+–; 28.Bd5?! Rc2 29.Kd3 Rg2 30.Bf7 Bb2=) 1–0. Nebe,L – Houben,R, corr, 1988.

10.d4 cb5 11.c5 Qa5 12.Bc3 =.

10.Be2 0–0 11.0–0 cb5 12.cb5 e5 13.Qc2 =+.

10.Be2 0–0 11.0–0 e5 12.c5 Bc5 13.Ne5 Bd6 =.

10.Be2 0–0 11.0–0 e5 12.bc6 bc6=+ 13.Qa4 (13.c5 Bb8=+) 13...Qc7 14.h3 c5 (14...e4 15.Nd4=+) 15.cd5= e4 (15...Nd5!? 16.Nc3 Bb7=) 16.Ng5+= Nb6 17.Qc2 Nbd5 (17...Bh2 18.Kh1 Be5 19.Nc3+/–) 18.Ne4 Ne4 19.Qe4 Bb7 20.Bf3 (20.Qf5 Ra8 21.Nc3 Ne7+/–) 20...Rb8 (20...Ra8 21.Nc3 Nc3 22.Qb7 Qb7 23.Bb7+/–) 21.Qf5 (21.Qg4 Bh2 22.Kh1 Be5 23.Be5 Qe5+/–) 21...Ne7 22.Qg5 (22.Qg4 Ng6+=) 22...Ng6 23.Bb7 Qb7 24.Nc3 Be5 25.f4 f6 26.Qf5 Bc3 27.Bc3 Qg2+= 28.Kg2 Nh4 29.Kg3 Nf5= 30.Kf3 c4 31.Ra1+= Nd6 32.Ra4 Rc8 33.Rb4 f5 34.Be5 Rd8 35.d4 cd3 36.Rd4 Nf7=+ 37.Rd8 Nd8–/+ 38.Bc3 ½–½. Jaskulski,Klaus – Markus,Roland, corr DDR–ch I243, 1983.

10.Nc3 0–0

11.d4 Bb4 12.Qa4 c5 13.dc5 Bc5 14.cd5 Nb6 =.

11.Be2 e5

12.0–0 Qc7 13.bc6 bc6 14.cd5 e4 =.

12.0–0 Qc7 13.g3 dc4 14.Bc4 Nb6 15.Be2 =+.

12.0–0 Qc7 13.g3 e4 14.Nd4=+ dc4 (14...c5 15.Nf5 dc4 16.Qc2–/+) 15.bc6 bc6 16.Bc4 (16.Qc2 Re8=+) 16...Ne5 17.Be2 Bh3 18.Re1 Rd8 (18...c5 19.Ndb5 Qc6 20.Nd6 Qd6 21.Nb5=+) 19.Qa4 (19.Qb1 c5 20.Ndb5 Qc6 21.Nd6 Qd6=+ (< 21...Rd6 22.Qb8 Bc8 23.Nb5 Rd2 24.Nc7+–)) 19...h5 (19...c5 20.Ndb5 Qc6 21.Nd6 Qd6 22.Ne4 Ne4 23.Qe4 Qd2 24.Qb1=+) 20.Nc2 (20.Qc2 c5 21.Ndb5 Qc6 22.Nd6 Rd6=) 20...Nf3 (better is 20...Bf5!?–/+) 21.Bf3= ef3 22.Ne4 (22.Nd4 Bg2=) 22...Ne4 23.Qe4 c5 (23...Bg4 24.Nd4=) 24.Bc3 (24.Qf3!? Bg4 25.Qe4+=) 24...Bg4=+ 25.Na3 Qd7 (25...Qe7 26.Qc2=+) 26.Nc4= Bc7 27.Ra1 f5 28.Qb7 Rb8 29.Ra8 Ra8 30.Qa8 Kh7 31.Qf8+= Bb8 32.Qb8 Qa4+= 33.Qb1 Qc4 34.Qb7 Qg8 35.d3 Qf8 36.Be5 Kg8 37.Qc7 Qf7 38.h4 Qc7+= 39.Bc7 Bh3 ½–½. Lohr – Markus, corr SOK–88–18, 1988.

12.Qb3 Nc5 13.Qc2=+ e4 14.Nd4= Qc7 (14...Bd7!?=) 15.bc6+= bc6 16.cd5 Qa5 17.0–0 cd5 18.Ncb5 Be7?? (better is 18...Qb6 19.Nd6 Qd6+/–) 19.Nc6+– (19...Qb6 20.Ne7 Kh8 21.Bd4+–) 1–0. Gedigk – Markus, corr SOK–88–18, 1988.

12.Qb3 Nc5 13.Qc2=+ Bg4 14.d4 Bf3 15.dc5 Be2 16.Ne2 Bc5 17.Be5 Bb4 18.Bc3 Bc3 19.Nc3 –/+.

12.Qb3 e4 13.Nd4 dc4 14.Bc4 =+.

12.d4 dc4 13.Bc4 e4 =.

12.d4 dc4 13.bc6 bc6 14.Bc4 Qa5 15.0–0 Bb4 16.Na2 Bd6 17.Qc2 ed4 18.Bd4+= c5 19.Bc3 Qc7 20.h3 Bb7 21.Nd2 Ne5 22.Be2 Nd5 23.Be5 Be5 24.Rc1 Rc8 25.Bg4 Ra8 26.Nc4 Bf6 27.Rb1 Bc6 28.Bf3= g6 29.e4 Nf4 30.Nb6 Rb8 31.Nd5 Rb1 32.Qb1 Nd5 33.ed5 Bd7 34.Be2 Bd4 35.Qf1 Qe5 36.Bf3 Qf4 37.Qe2 h5 38.Kf1? Qh2–+ 39.Ke1 Qg1 40.Kd2 Qb1 41.Qc4 Bb5 42.Qc2 Qf1 43.Nc3 Qf2 44.Kc1? Qe3 45.Kb2 Ba4! 46.Qc1 Qc1 (47.Kc1 Bc3–+) 0–1. Gerold,G – Neckel,O, corr DDR, 1988.

8.Nf3 Be7

9.c4 0–0 10.Qc2 Nbd7 11.Bb2 (11.Bd4 c5 12.Bc3 Bd6=+) 11...Nb6 (11...Bd6 12.cd5 cd5 13.Be2=+) 12.cd5 (12.c5 Nbd7 13.d4 cb5 14.Bb5 b6=) 12...Qd5 (12...cd5 13.Bd3=) 13.Nc3 (13.bc6 bc6 14.Nc3 Qd6=) 13...Qc5 (13...Qd6 14.bc6 Qc6 15.Ne5=) 14.bc6 bc6 (14...Qc6 15.Ne5 Qd6 16.d4=) 15.d4+= Qb4 16.Bd3 Nc4 17.Bc4 Qc4 18.Ne5 Qa6 19.Na4 (19.e4 c5 20.dc5 Bc5=) 19...Bb4 (19...Qa5 20.Nc3 Bb7 21.0–0=) 20.Kd1 (20.Bc3 Bd6+=) 20...Bb7 (20...Ne4 21.Nc3 Nc3 22.Bc3=) 21.Nd3 (21.Nc5 Bc5 22.Qc5 Ne4=) 21...Nd5 (21...Bd6 22.Nac5 Qb6 23.Qb3 (< 23.Nb7 Qb7 24.Ke1 Rb8=+) 23...Qb3 24.Nb3=+) 22.e4+= Nb6 23.Nac5 Bc5 24.Nc5 Qc4?? 25.Nb7+– Qc2 26.Kc2 Nc4 27.Bc3 Rc8 28.Ra1 h6 29.Ra4 Nb6 30.Ra6 Nc4 31.Kd3 Nb2 32.Bb2 (32…Rb8 33.Ra7+–) 1–0. Waibel,Ulrich – Fulsom,Jack, compuserve, 1996.

9.c4 0–0 10.Nc3 Nbd7 11.bc6 bc6 12.cd5 cd5 13.Be2 Qa5 14.0–0 Ba6 15.Nd4 Rc8 16.Nb3 Qb6 17.Ba6 Qa6 18.f4 Nc5 19.Nd4 Nce4 20.Ne4 Ne4 21.Nf3 Bf6= (21...Bb4!?=+) 22.Bf6 Nf6 23.Qb3 Qc4 24.Qb7 Qc7 25.Rb1 Qb7 26.Rb7 Ne4 27.Kf1 Nd6 28.Rd7 Ne8 29.Ng5 Rc7 30.Rd8 Re7 31.d3 h6 32.Nf3 Kf8 33.Ne5 Rc7 34.Kf2 Ke7 35.Rb8 Rc1 36.Rb7 Rc7 37.Nc6 Kd6 38.Rc7 Kc7 39.Ne5 Nd6 40.g4 f6 41.Ng6 Kd8 42.Kf3 Ke8 ½–½. Faber – Muehlberg, Sachsen–Anhalt 1997.

9.c4 Nbd7 10.Be2 0–0 11.0–0 dc4 12.bc6 bc6 13.Bc4 Qa5 14.Bc3 Qa7 15.d4 Ba6 16.Qa4 Nb8 17.Ne5 c5 18.Ba6 Qa6 19.Qa6 Na6 20.Nc6 Bd6 21.dc5 Bc5 22.Bf6 gf6 23.Rd1 Rc8 24.Rd8 Rd8 25.Nd8 Nb4 26.Nb7 Nd3 27.Nc5 Nc5 28.Kf1 f5 29.Ke2 Kg7 30.Na3 Kg6 31.Nc2 Ne4 32.f3 Nd6 33.Kd3 f6 34.Kd4 h5 35.Kc5 Nf7 36.Nd4 e5 37.Nc6 Kg5 38.Kd5 f4 39.e4 Kg6 40.Ne7 Kg7 41.Ke6 Nh6 42.h4 Nf7 43.Nd5 Nh8 44.Nf6 Ng6 45.Kf5 Nh4 46.Ke5 Ng2 47.Nh5 Kh6 48.Nf6 Kg5 49.Nh7 Kh4 50.Kf5 Kg3 51.e5 Ne3 52.Ke4 Nc4 53.e6 Nd6 54.Ke5 Ne8 55.Ng5 Nc7 56.e7 Ne8 57.Ke6 Kh4 58.Ne4 Kh3 59.Kf5 1–0. Sicker,Rolf – Bouma,Jan, corr TKM/A007, 1999.

9.Bd4 0–0 =.

9.Be2 0–0 10.0–0 c5 11.c4 b6 12.d4 Bb7 13.Nbd2 (13.dc5 Bc5 14.cd5 Nd5=) 13...dc4 (13...Nbd7 14.Ne5=) 14.Nc4 Qc7 15.Nfe5 (15.dc5 Qc5 16.Nce5 Nd5=) 15...Nbd7 (15...Rd8 16.Qc2=) 16.Bf3 (16.Nd7 Nd7 17.dc5 Bc5=) 16...Bd5 17.Qe2 (17.dc5 Qc5 18.Qb3 Ne5 19.Bd5 Qd5 (worse is 19...ed5 20.Ne5 Ra8 21.Bd4+/–) 20.Be5 Rc8 21.Bf6 Bf6–/+) 17...Rd8 (17...Ne5 18.Ne5 Bd6 19.Rc1=) 18.Rd1 (18.Nc6!? Re8 19.Rc1+=) 18...Ne5= 19.Ne5 Nd7 (19...cd4 20.Bd4 Bf3 21.Nf3=) 20.Nc6 (20.Bd5 Ne5 21.Be6 fe6 22.de5 Rd1 23.Qd1 Qa7+=) 20...Bc6+= 21.Bc6 Nb8 (21...cd4 22.Bd4 Bd6 23.Qh5+=) 22.Be4 Nd7 23.Bc6 Nf6 (23...Nb8 24.d5 Bd6+=) 24.e4 cd4 25.Rd4 Rd4 26.Bd4 e5 27.Be3 Bd6 28.Bg5 Nd7 29.Qg4 (29.h3 Nf8+=) 29...Nf8 30.h4 (30.Be3 Ne6=) 30...Be7 (30...Ne6 31.Bh6=) 31.Be3+= Kh8 (31...Ne6 32.h5+=) 32.h5 h6 (32...Ne6 33.h6 g6 34.Bd5+/–) 33.Qf5 Bf6 (33...Bc5!? 34.Bc5 bc5+=) 34.Bh6!+– gh6? (better is 34...Ne6 35.Be3 Nd4 36.Bd4 ed4+–) 35.Qf6 Kh7 36.Kh2 Ne6 37.g4 (37.Bd5!? Ng5+–) 37...Ng5 38.Kg3 (38.f4 ef4 39.e5 Kg8 40.Qf4 Qd8+–) 38...Qa7+/– 39.f3 (39.Qf5 Kg8 40.Qc8 (40.Qe5 Qa3 41.f3 Qf3 42.Kh2 Qf2 43.Kh1 Nf3 44.Qh8 Kh8 45.e5 Qf1) 40...Kg7 41.Qa6+/–) 39...Qa1= 40.Kf2 Qb2 41.Ke1 Qc1 42.Ke2 Qc2 ½–½. Lohmar,Hermann – Bartelt,Max Peter (1760), Dortmund Germany, Sparkassen Open–B, 2016.

9.Be2 0–0 10.0–0 c5 11.c4 Nbd7 12.d3 b6 13.Nbd2 Bb7 14.Nb3 (14.Bc3 Qc7=) 14...Qc7 15.h3 dc4 16.dc4 Ne4 (16...Ra8 17.Nbd2=) 17.Nbd2= Ndf6 18.Qc1 Nd2 19.Qd2 Ne4 20.Qc1 Bf6 (20...Bd6 21.Qc2+=) 21.Rd1 Ra8 (21...Ba1 22.Qa1 f6 23.Nd2=) 22.Bf6= Nf6 23.Qd2 Ne8 24.Qd7 Qd7 25.Rd7 Bc8 26.Rd8 Kf8 (26...Bb7 27.Ra8 Ba8 28.Ne5=) 27.Ne5+= f6 (27...Ke7 28.Nc6 Kf8 29.Rd1+/–) 28.Bf3 (28.Nd7!? Ke7 29.Nb6 Kd8 30.Na8+/–) 28...Bb7+= 29.Ra8 Ba8 30.Nd7 Ke7 31.Nb6 Bf3 32.gf3 Nd6 33.Kf1 Kd8 34.Ke2 Kc7 35.Na4 Nc4 36.Nc5 Kd6 37.Na4 Kc7 (37...h5 38.f4 Kd5 39.Kd3+=) 38.f4+/– Nd6 39.Nc5 e5 40.fe5 fe5 41.Ne6 Kb6 (41...Kd7 42.Nf8 Kc7 43.Nh7 Nb5 44.Kd3+/–) 42.Ng7 Kb5 43.Nh5 Kc6 (43...e4!?+/–) 44.Nf6+– h6 (44...e4 45.Nh7 Kd5 46.f3 ef3 47.Kf3+–) 45.Kf3 Nf7 46.Kg4 Kd6 47.Kh5 Ke6 48.Ng4 (48.Ng8 Ng5 49.h4 Nf3+–) 48...Ng5 (48...Nd6 49.Nh6 Kf6 50.h4+–) 49.h4 Nh3 (49...Ne4+–) 50.Kh6 Kf5 51.Kh5?? (51.Nh2 Kf6 52.f3+–) 51...e4+= 52.Nh6 Kf6 53.Kg4 Nf2 54.Kf4 Kg6 55.Ng4 Nh3 (55...Nd1 56.Kg3+=) 56.Ke4 (56.Kg3 Ng1+=) 56...Kh5+= 57.Ne5 Kh4 58.Nd3 Kg4 ½–½. Tagirov,Kajum K (1925) – Ermakov,Vladimir (2055), Memorial Dautov, 2008.

9.Be2 0–0 10.0–0 Bd7 11.bc6 Nc6 12.Ne5 Ne5 13.Be5 Bc6 14.Bf6 Bf6 15.d4 Qc7 16.Nd2 e5 17.c3 Ra8 18.Nb3 Ba4 19.Qc2? (better is 19.Qa1!?+=) 19...ed4–/+ 20.ed4 (20.Ra1!? de3 21.fe3–+) 20...Bd4!–+ 21.Bd3 (21.Nd4 Bc2 Pinning (21...Bc2 Deflection); 21.cd4 Qc2 Pinning (21...Qc2 Deflection)) 21...Qc3 22.Bh7 Kh8 23.Qc3 Bc3 24.Bc2 d4 25.Rc1 Bc6 26.h3 g6 27.Nc5 b5 28.Be4 Be4 29.Ne4 b4 30.Kf1?! (30.Rb1 d3 31.g4 f5 32.gf5 gf5–+) 30...Ra2 (30...b3 31.Ke2 b2 32.Rb1–+) 31.Nd6? (31.Rb1 d3–+) 31...Kg7 (31...b3 32.Rd1 b2 33.Nc4–+) 32.g4 (32.Rb1–+) 32...b3 33.Nc4 b2 (33...Ra4!? 34.Rb1 Rc4 35.Ke2–+) 34.Nb2 Rb2 0–1. Ruhle,Ernst Albrecht (1610) – Koch,Werner (1800), SUI–ch Seniors, 2004.

9.Be2 0–0 10.0–0 Nbd7 11.Nc3 =.

9.Be2 Bd7 10.bc6 bc6 11.0–0 0–0 12.c4 Ne4 13.d3 Nf6 (13...Nc5 14.d4 Ne4 15.Qa4=) 14.Nbd2 Na6 (14...c5 15.cd5 ed5 16.h3=) 15.Ne5 (15.Qa4 Nb4+=) 15...Nc5 (15...Qa5 16.f4+=) 16.Qc2 Qc7 (16...Na6 17.Qc1+=) 17.Rc1 (17.Nef3 dc4 18.Qc4 Nb7+=) 17...Qa5? (17...Ra8 18.Bc3+=) 18.Bc3 (18.Bd4 Rc8 19.Ra1+/–) 18...Qa4 19.Qb2 Ra8 20.d4 White threatens to win material: d4xc5 20...Na6?? (better is 20...Nce4 would save the game 21.c5 Be8+=) 21.Ra1+– Rb8 (21...Qa1 the only chance to get some counterplay 22.Qa1 dc4 23.Bc4 Bc8+–) 22.Qb8!! a small price for the final victory (22.Qb8 Nb8 23.Ra4+–) 1–0. Jakobi,Axel – Stoecker,Ronald (1750), Schleswig Holstein–ch cand, 2002.

9.Ne5 Qc7 10.f4 Nbd7 11.bc6 bc6 12.c4 0–0 13.Be2 Bd6 14.Nd7 Nd7 15.Qc2 Bb7 16.0–0 f6 17.Bd3 f5 18.cd5 cd5 19.Qc7 Bc7 20.Bd4 Bd6 21.Nc3 Nc5 22.Rb1 Rf7 (22...Nd3 23.Rb7 Rf7 24.Rb6=) 23.Bf1 Ne4 24.Rb6 Bf8 25.Ne4 de4 26.Re6 Bd5 (26...Rc7!?+/–) 27.Re5+– Bb3 28.g4! fg4 29.Re4 1–0. Stadchenko,Inna – Oeden,Mehmet Hasim, ICCF FM/1600, 2012. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.e3 Be7)

7.Ba1 Bd6

8.c4 0–0 9.Nf3 c6 10.Nc3 e5 11.bc6 e4 12.cb7 Bg4 13.h3 Bh5 14.g4 ef3 15.gh5 d4 16.Qf3 Qa5 17.Qd1 de3 18.fe3 Bg3 19.Ke2 Qh5 20.Kd3 Qf5 21.e4 Ne4 22.Ne4 Rd8 23.Bd4 Nc6 24.Bg2 Rd4 25.Kc3 Qa5 26.Kb2 Be5 27.Nc3 Rc4 28.Qb3 Rb4 29.Bc6 Rb3 30.Kb3 Qb6 31.Kc2 Qc6 32.Rb1 Bb8 33.d4 Qg2 34.Kd3 Qh3 35.Kc4 h5 36.Rb5 Qf1 37.Kc5 h4 38.d5 h3 39.d6 Qd3 40.Kb4 Qd6 0–1. Bulcourf – Abramson, 1988.

8.c4 c5 9.Nf3 Nbd7 10.d4 0–0 11.Nc3 Qa5 12.Qa4 Qc7 13.Qb3 cd4 14.Nd4 Nc5 15.Qc2 Qa5 16.Qa2 Qa2 17.Na2 Bd7 18.Nf3 Nfe4 19.Nc3 Ra8 20.Bb2 Nc3 21.Bc3 Ne4 22.Bd2 Ra1 23.Ke2 dc4 24.Nd4 Ra2 25.Nf3 c3 0–1. Berlik – Buczinski, Siemianowice Slaskie, 1966.

8.c4 e5 9.Nf3 e4 10.Nd4 0–0 11.Be2 dc4 12.Bc4 Nbd7 13.0–0 Bh2?? (13...Nb6 14.d3 Nc4 15.dc4 Bh2 16.Kh2 Ng4 17.Kg3 Qd6 18.f4 Ne3–+) 14.Kh2+/– Ne5 15.Bb3 Nfg4 16.Kg1 Qh4 (17.Qg4 Ng4–+) 0–1. Hasler,Ueli – Pinto,Luisa (2020), CiF, 2005.

8.Nf3 Nbd7 (--> 7.Ba1 Nbd7 8.Nf3 Bd6).

8.f4 Nbd7 9.Nf3 0–0 10.Bd3 c5 11.bc6 bc6 12.0–0 (12.Be2 Qa5 13.Bc3 Qb6 14.0–0 Ne4 15.Bd4 c5 16.Ba1 Bb7 17.Nc3+=; 12.Qe2 c5 13.Bb5 Qa5 14.Bf6 Nf6 15.0–0 Bb7 16.c4 Rb8 17.Nc3+=) 12...Bb7 (12...Qc7 13.Bb2 Bb7 14.c4 Rb8 15.Qc2 c5 16.Na3 d4 17.Nb5=) 13.c4 (13.Ne5 Ne4 14.Qf3 Ndc5 15.Be2 Qa5 16.Bc3 Qa4 17.Rc1+=) 13...Ba6 (13...c5 14.Qc2 Qe7 15.Ne5 Nb6 16.Nc3 Ra8 17.cd5=) 14.Qc2 Qa5 (14...Qb8 15.Bd4 c5 16.Bf6 Nf6 17.cd5+=) 15.Bc3 Qb6 (15...Bb4 16.cd5 Bd3 17.Qd3=) 16.Bd4 (16.Ne5 Nc5 17.Bd4=) 16...c5 17.Bf6 (17.Be5=) 17...Nf6 18.Qa4 Bb7 19.Nc3 Bc6 20.Qc2 Rb8 21.cd5 ed5 22.Ne5 Be8 23.Be2 Qc7 24.Qf5 d4 25.ed4 cd4 26.Ne4 Ne4 27.Qe4 g6 28.Bf3 (28.Qd4?? Bc5 29.Qe3 Rd8–+) 28...Bb4 29.d3 (29.Qd4?? Bc5 30.Qf2 Bf2 31.Kf2 f6–+) 29...Kg7 30.g3 (30.Qd4?? Bc5 31.Qf2 Bf2 32.Kf2 f6–+) 30...Bc3 31.Nc6 ½–½. Degterev,Pavel (2475) – Ellis,Les (2245), Champions League, 2010.

8.c4 c6

9.Nc3 Black forfeits by disconnection 1–0. BlackDemon (2625) – PeteVine (2055), FICS rated standard game, 2013.

9.Nf3 0–0 10.Be2 Nbd7 11.0–0 Qc7 12.bc6 bc6 13.cd5 cd5 14.Nc3 Qb8 15.Qa4 Nc5 16.Qc2 Qb3 17.Qb3 Nb3 18.Nb5 Be7 19.Be5 Ne4 20.d3 Ned2 21.Nd2 Nd2 22.Rd1 Bd7 23.Nc7 Nb3 24.Rb1 Nc5 25.f3 f6 26.Bg3 Kf7 27.d4 Na4 28.Bf1 Rc8 29.h4 h5 30.Rb7 Bc6 31.Ra7 Nb2 32.Na6 Kf8 33.Be2 Nc4 34.Nc7 Kf7 35.e4 Ne3 36.Bf2 Nc2 37.ed5 Bd5 38.Nd5 ed5 39.f4 g6 40.f5 gf5 41.Bh5 Ke6 42.Bg6 f4 43.g4 Rc4? The isolani on d4 becomes a target (better is 43...Rc3+=) 44.Bf5+– Kf7 45.h5 Nd4? (better is 45...Ne3!? 46.h6 Rc1 (46...Rd4?? 47.h7 Rd1 48.Kh2+–) 47.Kh2 Nf5 48.gf5 f3+–) 46.Bg6+– Ke6 47.h6 Rc1 48.Kh2 Nf3 49.Kg2 (49.Kg2 Ne1 50.Be1 Re1 51.h7 Re2 52.Kf1+–) 1–0. pvanr (2255) – festis (2000), gameknot.com, 2015.

8.Nf3 0–0

9.c4 b6 10.d3 dc4 11.dc4 Bb4 12.Nbd2 Ne4 13.Be2 (13.Qc2 Bb7 14.Bd3 f5=) 13...Nd2 14.Nd2 Bb7 15.0–0? (better is 15.Qc2+=) 15...Qd2 16.Qd2 Bd2 17.Be5 c6 18.Bf3 Nd7 19.Bd6 Rc8 20.Rd1 Bc3 21.Bf4 Ne5 22.Be5 Be5 23.bc6 Ba6 (23...Ba8!? 24.Rd7–+) 24.Rc1 Bc7 25.Kf1 Rd8 (25...Bh2?! 26.g3–/+) 0–1. Hal1958 – Coolhandluke, playchess.de, 2005.

9.c4 b6 10.cd5 ed5 11.Qc2 Nbd7 (11...Bb7 12.Qf5=) 12.Be2 Re8 13.0–0 Nc5 14.Bd4 Bg4 (14...Bb7 15.d3+=) 15.h3 Bd7 (15...Bc8 16.Nc3+=) 16.Nc3 Nce4 17.Qb3 Nc3 18.Qc3 Ne4 19.Qb2 f6 20.Ra1 Nc5 21.d3 Qc8 22.Bc3 Bf5 23.Qa2 Qe6 24.Qc2 Qe7 25.Ra7 Qd7 (25...Bd7!?+=) 26.Nd4+/– Bh3 (26...Be5 27.Nf5 Qf5+/–) 27.gh3 (27.Bf3 Be6 28.Ne6 Ne6 29.Qb3+=) 27...Qh3= 28.Nf3 Ne6 29.Qa2 (29.Bd1 d4=) 29...Nf4 30.ef4 Qg4 31.Kh1 Qh5 32.Kg2 Qg4 33.Kh2 Bf4 34.Kh1 Qh3 35.Kg1 Qg4 36.Kf1 Qh3 37.Kg1 Qg4 38.Kh1 Qh3 39.Kg1 ½–½. Pierred (2195) – Improving (2540), Rated game, 3m + 0s, 2005.

9.c4 b6 10.cd5 Nd5 11.Bc4 =.

9.c4 dc4 10.Bc4= c6 11.0–0 (11.Nc3 e5=) 11...cb5 12.Bb5 Bd7 13.Bd7 (13.Nc3 e5=) 13...Nbd7 14.d4 (14.Qe2 Qe7=) 14...Qb8 (14...b5 15.Qe2 b4 16.e4=) 15.Nbd2 Rc8 16.Qb1 (16.Qb3 Qc7=) 16...b5 17.e4 Bf4 18.e5 (18.Re1 Ng4 19.Nf1 Qb7=) 18...Ne8 (18...Nd5 19.Ne4=+) 19.g3 (19.Bb2 Qb7=+) 19...Bd2=+ 20.Nd2 b4 21.Qb3 (21.f4 Qb6=+) 21...Nc7 22.Ne4 Nd5 23.Bb2 h6 24.Nd6= Rc7 25.Ra1 Ra7 26.Rc1 Rc7 27.Rd1 Ra7 28.f4 N7b6 29.f5 Na4 30.Rc1 Nab6 31.fe6 fe6 32.Nb5 Rf7= 33.Nd6 Rc7 34.Rf1 Qa8 35.Nb5 Rf7 36.Rf7 Kf7 37.Nd6 Ke7 38.Qf3 Qf8= 39.Qd3 Qa8 40.Qg6 Qf8= 41.Bc1 Nc3 42.Qd3 Nbd5 43.Qa6 Qb8 44.Kg2 Kd7 45.Qf1 Qa8 46.Kh3 Qg8 47.Bd2 g5 48.Qa6 Qb8 49.Qd3 b3 50.Bc3 Nc3 51.Nc4 b2 52.Nd2 b1Q 53.Nb1 Nb1 54.Qh7= Kc8 55.Qc2 Kd8=+ 56.Qg6 Qb5 57.Qf6 Kc7=+ 58.Qe7 ½–½. Jalo,Pentti – Maki,Kalevi, Vantaa We Remi, 1997.

9.c4 dc4 10.Bc4 Nbd7 11.0–0 b6 (11...e5 12.d3=) 12.Nc3 Bb7 13.d4 Qe7 14.Re1 (14.Qe2 Ra8=) 14...Ra8 (14...c5 15.e4 cd4 16.Qd4=) 15.e4 Bb4 16.Nd2 (16.d5!?=) 16...Qd6=+ 17.e5? (better is 17.Qc2 Qd4 18.Bb2=+) 17...Qd4–+ 18.Nce4 Ra1! 19.Qa1 Qa1 20.Ra1 (20.Nf6 gf6 21.Ra1 Bd2–+) 20...Ne4 (21.Ne4 Be4–+; 20...Be4?! 21.ef6 Bd2 22.Rd1 Nf6 23.Rd2=) 0–1. Young,L – DeFotis, North Central Open, 1969.

9.c4 dc4 10.Bc4= Nbd7 11.d3 =+.

9.c4 dc4 10.Bc4 Nbd7 11.d4 Nd5 12.0–0 N7b6 13.Bd3 f5 14.Ne5 f4 15.e4 Nb4 16.Nc4 Nd3 17.Nb6 Nf2 18.Rf2 cb6 19.Nc3 White prepares the advance d5 19...Bb4 20.Ne2 Bd7 21.Qb3 Bd2 22.Qb2? (better is 22.Rf1–/+) 22...Be3–+ 23.d5 Qf6 (better is 23...Qg5 24.Qe5 Ra8–+) 24.Qa2?? (better is 24.Qf6!? gf6 25.de6 Bb5 26.Nc3–+) 24...Qf7 (better is 24...Bf2 25.Kh1 Qg6 26.Nc3–+) 25.Bd4 Bf2 26.Kf2 f3 27.gf3 Qf3 28.Ke1 Bb5 29.Ng3 Qd3 30.Qb2 Rf1! 31.Nf1 Qf1 32.Kd2 Qe2 33.Kc1 Qe1 34.Kc2 Ba4 35.Kd3 ed5 36.Qe2?? Qb1 37.Ke3 Qe4 38.Kf2 Qd4 39.Kg2 Qe4 40.Qe4 de4 41.Kf2 b5 42.Ke3 b4 43.Ke4 Kf7 44.Kd4 b5 45.Kd3 Ke6 46.Kd2 g5 47.Kc1 h5 48.Kb1 g4 49.Kb2 h4 50.Kb1 g3 51.hg3 hg3 52.Kc1 g2 53.Kd2 g1Q 54.Ke2 Ke5 55.Kd2 Kd4 56.Ke2 Qg2 57.Ke1 Qh2 58.Kf1 Ke3 59.Ke1 Qg1 (59...Qe2) 0–1. Jostov,Keylah – Molina,Vicente Andres, 9. LSS No Engine Cup Preliminary, 2009.

9.c4 c5 (--> 7.Ba1 c5 8.Nf3 Bd6 9.c4 0–0).

9.c4 Nbd7 10.Be2 c5 11.Nc3 Nb6 12.d3 dc4 13.dc4 Qe7 14.Qc2 e5 15.Nd2 Bg4 16.f3 Bh5 17.0–0 Bb8 18.Rd1 Ba7 19.e4 Qd6 20.Nf1 Qc7 21.Ne3 Bg6 22.Ncd5 Nbd5 23.Nd5 Nd5 24.Rd5 f6 25.Qd2 Bf7 26.Rd7 Qb8 27.Qa5 Qc8 28.Rf7 Rf7 29.Qa7 Rd7 30.Bc3 Rd8 31.Ba5 Qa8 32.Qa8 Ra8 33.Bb6 Rc8 34.Bf1 g5 35.g3 Kf7 36.Bh3 Ra8 37.Bc5 Ra4 38.Bf1 h5 39.Kf2 1–0. Kreuzer – COMP, 1989.

9.d4 c6 10.Nbd2 Qc7 11.Ne5 Nfd7 12.Ndf3 (12.Nef3 Nf6+=) 12...cb5–/+ 13.Bb5?? (better is 13.Bd3–/+) 13…Qa5–+ (13...Qa5 14.Nd2 Qb5–+) 0–1. Schaar,Joerg (1940) – Markoja,Johann (2070), RSS4D easy–35, 2007.

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

9.Be5 Be5=+ 10.Ne5 Nbd7 11.d4 Ne5 12.de5 Nd7 13.f4 Qh4 (13...c5 14.Be2=+) 14.g3 Qe7 15.Nc3 Qa3 16.Qd2 Nc5 17.Bg2 Na4 18.Na4 Qa4 19.b6 cb6 20.0–0 Bd7 21.Rb1 Rc8 22.c3 Bb5 (22...Rc5 23.e4 de4 24.Qe1=+) 23.f5 Ba6 24.e4 de4 25.fe6 fe6 26.Qd6 Re8 (26...Rc3?! 27.Qe6 Kf8 28.Qf5 Ke7 29.Qg5 Kf8 30.Qd8 Qe8 31.Qd6 Qe7 32.Be4=) 27.Qb6 (27.Re1 Bd3=+) 27...Qc2 28.Re1 (28.Qb2!? Qb2 29.Rb2–/+) 28...Qc3–+ 29.Qe3 Qe5 30.Be4 Qa5 31.h3 Qh5 (31...Rf8 32.Bg2 Rf6 33.Rc1–/+) 32.Kh2–/+ Kh8 33.Rb1 Qe5 (33...Qf7 34.Qf4 Qf4 35.gf4–+) 34.Qf4 (34.Rb6 Rf8–+) 34...Qf4 35.gf4 Re7 36.Kg3 (36.Rb6 g6–+) 36...Kg8 (36...g6 37.Rb6–+) 37.Kf2 (37.Kf3 g6–+) 37...g6 38.Ke3 Kf7 39.Rb6 Rd7 (40.Kf3 h6–+) 0–1. marekt (2490) – lonewolf (2555), ChessWorld.net, 2003.

9.c4 c6

10.Qb3 Nbd7 11.d4 c5 =.

10.Qb3 Nbd7 11.Be2 e5 12.0–0 dc4 (12...e4 13.Nd4=+) 13.Bc4 c5 (13...cb5 14.Qb5 e4 15.Ng5=+) 14.Ng5 (14.d3 Qe7=) 14...Qe7=+ 15.Nc3 (15.d3 Nb6=+) 15...Nb6 16.Nce4 (16.Bd3 h6 17.Nge4 Be6 18.Nf6 Qf6=) 16...Nc4 17.Qc4 Ne4 18.Ne4 Be6 19.Qc3 f6 20.b6 (20.Nd6 Qd6 21.d4 cd4 22.ed4 Qd4 23.Qd4 ed4 24.Bd4 Bc4=) 20...Rc8 21.Qa3 (21.d3 c4=+) 21...Qd8 (21...f5 22.Nd6 Qd6 23.d3=+) 22.Nd6 Qd6 23.Qa7 Bc4 24.Qb7 (better is 24.Rd1!?–/+) 24...Rd8–+ 25.Rd1 Be2 26.Rb1 (26.Be5 fe5 27.Ra1 c4–/+) 26...Qd3 27.Rb2 Qa3 28.Qa7 Ba6 29.Rb1 Qd3 30.Rd1 Qc2 (31.Qa6 Qd1 32.Qf1 Qf1 33.Kf1 Rd2–+) 0–1. Vodep – Janetschek, 1967.

10.Qc2 dc4 11.Bc4 cb5 12.Bb5 =.

10.Qc2 c5 11.d4 b6 12.Bd3 (12.dc5 Bc5 13.cd5 Nd5+=) 12...Bb7 (12...dc4 13.Qc4 Bb7 14.dc5 Bc5 15.Nbd2=) 13.Ng5 (13.dc5 Bc5 14.cd5 Bb4 15.Nbd2 Kh8+/–) 13...g6 (13...h6 14.Nf3 Nbd7=+) 14.h4 (14.0–0 Ng4 15.h4 h6=+) 14...Re8 (better is 14...dc4!? 15.Bc4 Bg2 16.dc5 Bh1 17.cd6 Nbd7–/+) 15.h5 (15.dc5 Bc5 16.cd5 Nd5=) 15...Nh5 16.Rh5 gh5 17.Bh7 Kf8 18.Nf7 Re7?? (18...Kf7 19.Qg6 A classical mating theme) 19.Nd8 dc4 (19...cd4 20.Nb7 Rb7 21.cd5+–) 20.Ne6! Re6 21.Qf5 Ke7 22.dc5 Bc5 23.Bg7 Nd7 24.Nc3 Bb4 25.Kf1 Bc3 26.Bc3 Nc5 27.Bb4 Be4 28.Bc5 bc5 29.Qc5 Kf7 30.Be4 Re4 31.Qd5 (31...Re6 32.Qh5 Kf6 33.Qh4 Kf7 34.Qc4+–; 31.Qf5 Kg7 32.Qe4 c3+–) 1–0. mtr – torogi, Caissa's Web, 2001.

10.Qc2 c5 11.d4 Nbd7 12.Bd3 =.

10.Qc2 Nbd7 11.Bd3 Qc7 (11...e5 12.cd5 cd5 13.Be2–/+) 12.Ng5 (12.0–0 cb5 13.cb5 Qc2 14.Bc2 b6=) 12...h6 13.h4 (13.Nf3!?+=) 13...dc4–/+ (13...hg5?! 14.hg5 Rd8 15.gf6 Nf6 16.c5+=) 14.Qc4 cb5 (14...hg5 15.hg5 Rd8 16.Qh4+–) 15.Qc7 Bc7 16.Nf3 b4 17.Nd4 (17.Bb5!? b6–/+) 17...Nc5 18.Bc2 Bd7 19.d3?? (19.Nb3 Nfe4 20.d4 Nb3 21.Bb3–+) 19...Ra8 20.Nb3 b6 (better is 20...Nb3 21.Bf6 Nc5–+ (21...gf6?! 22.Bb3 Bc6 23.Ke2–+)) 21.N1d2 Bb5 22.Ke2 Nd5 (22...Ra2 23.Nc5 Rc2 24.Ncb3–+) 23.Bd4? (23.Nc5 bc5 24.Rc1 Ba4–/+) 23...Nb3 24.Bb3–/+ Nc3 25.Bc3 bc3 26.Nb1? Ra1 27.Rc1 Bd6 28.Bc4?? Bc4 (28...Bc4 29.dc4 c2 30.Rc2 Rb1–+) 0–1. Leon Manas,JF (1710) – Morales Quintero,JM (2095), 31st Torneo Internacional de Argentina, 2010.

10.Qc2 Nbd7 11.Bf6 Qf6 12.d4 e5–/+ (12...dc4 13.bc6 bc6 14.Nbd2 Bb7 15.Bc4 c5 16.Bb5 Nb6 17.dc5 Rc8 18.c6 Qa1; 12...g6 13.Nc3 Re8 14.Be2 Qf5 15.Qf5 ef5 16.c5 Bb8 17.Kd2 Nf6 18.Rb1 Bc7) 13.bc6 (13.Nc3 Re8 14.bc6 (14.Be2 e4 15.Nd2 Qg5 16.g3 Nf6 17.c5 Bc7 18.0–0 Ng4) 14...bc6+= 15.Be2 dc4 16.0–0 ed4 17.Nd4 Ba6 18.g3 Be5) 13...bc6 14.cd5 (14.Nc3 Re8 15.Be2 ed4 (15...dc4 16.0–0 ed4 17.Nd4 Nb6 18.Na4 Na4) 16.Nd4 dc4+= 17.0–0 Nb6 18.g3 Bb4) 14...cd5 15.Qb2 (15.Nc3 Bb4 16.Qb2 (16.Qb3 Ba5 17.Qa3 Qb6 18.Kd1 e4) 16...Ba5–+ 17.Nd2 Qc6 18.Ne2 f6) 15...Bc7 (15...e4 16.Nfd2–/+ Qg6 17.Nc3 Nf6 18.Qb6 Be7) 16.Qb5 (16.Nc3 Ba5 17.Qa3 Qb6–+ 18.Kd1 e4) 16...Qd6 (16...e4 17.Nfd2 Qe6 18.Nb3 Nf6) 17.Nc3 Qa3 (17...e4 18.Nd2 Nf6) 18.Nd5 Qa1 (18...Ba5+=) 19.Kd2. Trokenheim,Marek (2175) – Brueske,Thomas (2360), RSX5D – A00 – Sokolsky–1, 2010.

10.Nc3 e5 11.bc6 bc6!? 12.d4 ed4 13.Nd4 Qa5 =.

10.Nc3 e5 11.bc6 e4 12.cb7+= Bg4 (better is 12...Bb7!? 13.Nd4 dc4=) 13.h3+/– Bh5 14.g4 ef3 15.gh5 d4 16.Qf3 (16.Nb5!? de3 17.de3+/–) 16...Qa5 17.Qd1 (better is 17.Na2 Qa2 18.Bd4+=) 17...de3?? (17...dc3!? 18.Bc3 Qd8=) 18.fe3 (better is 18.de3 Bb4 19.Qc1+–) 18...Bg3= 19.Ke2 Qh5 20.Kd3 Qf5 21.e4 (better is 21.Ke2 Qf2 22.Kd3 Qf5 23.e4 Rd8 24.Kc2 Ne4 25.Qg4 Rd2 26.Kc1 Qg4 27.hg4+=) 21...Ne4 22.Ne4 Rd8 23.Bd4 Nc6 24.Bg2?? (24.Qg4 Ne5 25.Kc3 Ng4 26.Ng3 Qf3 27.Kc2–+) 24...Rd4–+ (24...Nd4 25.Qg4 Ne6 26.Ke2 Nd4 27.Kd1–+) 25.Kc3 Qa5 (25...Re4 26.Be4 Qe4 27.d4–+) 26.Kb2 Be5 27.Nc3 Rc4 (better is 27...Qb6 28.Kc1 Rc4–/+ (< 28...Qb7 29.Re1+=)) 28.Qb3=+ Rb4 29.Bc6 Rb3 30.Kb3 Qb6 31.Kc2 Qc6 32.Rb1 Bb8 33.d4 Qg2 34.Kd3 Qh3 35.Kc4 h5 36.Rb5 Qf1 37.Kc5 h4 38.d5 (38.Ra5 Qc1 39.Kc4 g5–+) 38...h3 39.d6 Qd3 (39...h2 40.Rb1 Ba7 41.Kb4 Qb1 42.Nb1–+) 40.Kb4 (40.Nd5 Bd6! 41.Kc6 Qc4 42.Kd6 Qb5 43.Ne7 Kf8–+) 40…Qd6 (41.Kc4 h2–+) 0–1. Bulcourf,Carlos (2295) – Abramson,Horacio (2250), Buenos Aires BCA op, 1988.

10.Nc3 e5 11.d4 e4 12.Nd2 =+.

10.Nc3 e5 11.d4 e4 12.Ne5 =+.

10.bc6 bc6 11.Qc2 Nbd7 12.d4 Ba6 13.Nbd2 Qa8 14.Bc3 c5 15.dc5 Bc5 16.Be2 dc4 17.0–0 Be7 (17...Rc8 18.Nc4 Qe4 19.Bd3=) 18.Ra1 Qc8 19.Bd4 (Increasing the pressure on the isolated pawn on c4) 19...Qc6 20.Nc4 Rc8 21.Nfd2 e5 22.Bb2 Qe6 23.Qa4 Bb7 24.Rc1 Nc5 25.Qd1 Nfd7 26.Bf3 (26.Na5 Ba8=+) 26...Bf3 27.Nf3 (e5 draws heavy fire) 27...f6 28.Qc2 Rb8 (28...e4 29.Nd4 Qd5 30.Nd2=+) 29.Ra1 Qd5 30.Rd1 Qe6 31.e4 Rc8 32.Ne3 Nb6 33.Nf5 Bf8 34.Nd2 Nca4 35.Qb1 Rd8 36.Ba1 Qd7 37.Qb3 Qf7 38.Qc2 ½–½. Cottarelli,Franco – Feilmayr,Erwin, corr ICCF TT, 2004.

10.bc6 bc6 11.cd5 cd5 12.Be2 Nc6 13.Nd4 Nd4 14.Bd4 e5 15.Bc3 Be6 16.d3 Qc7 17.0–0 Rb8 18.Bd2 Nd7 19.Qa4 Nc5 20.Nc3?? (better is 20.Qc2–/+) 20…Na4–+ (20...Na4 21.Na4 Qc2–+) 0–1. Valpa – Pirco, playchess.de, 2004.

10.cd5 ed5 11.Be2 Bf5 12.0–0 c5 13.Be5 Be5 14.Ne5 Qb6 15.Nc3 Nbd7 16.Nd7 Bd7 Attacking the isolated pawn on b5 17.Qb1 d4 18.Nd1 Re8 19.h3 Ne4 20.Qb2 (20.Qa2!?–/+) 20...Qa5–+ 21.d3 (21.Kh2 Nd2 22.Rh1 Bf5–+) 21...Nd2 (21...Qb5 22.de4 d3 23.Bf3+/–) 22.b6 (22.Re1 Nc4! 23.dc4 Qe1 24.Kh2 de3 25.fe3 Bf5–+) 22...Re6 23.e4 Rb6 24.Qc2 Ra6 25.Nb2 Nf1 26.Kf1 Qc3 (26...Qc3 27.Qb1 Ba4–+) 0–1. Hal1958 – Reddog, playchess.de, 2005.

10.Be2 cb5 11.cb5 Nbd7 12.0–0 e5 13.d4 e4 14.Nfd2 Re8 15.Bb2 Nf8 16.Ba3 Bb8 17.Re1 g5 (17...Ne6!?=) 18.Qb3 Ng6 19.Nc3 h5 (19...Be6 20.b6+=) 20.b6+/– Be6 21.Bb5 Qb6 22.Be8 Qb3 23.Bf7! Kf7 (23...Bf7 24.Nb3) 24.Nb3 b6 25.Nd2 Kg7 26.Rb1 Bc7 27.Na4 Nd7 28.Rb5 Bf7 (28...g4!?+/–) 29.Nb1+– Be8 30.Nbc3 Nf6 31.Rb1 (31.Rb6?! Bb6 32.Nb6 Bc6+/–) 31...Ba4 32.Na4 g4 33.Nb6 Kf7 34.Na4 Ne8 35.Rb5 Ke6 36.Nc5 Kf5 (36...Kf7 37.Na6 Ke6 38.Rb7+– (38.Nc7?! Nc7 39.Rb6 Kf5+–)) 37.Na6 Ke6 38.Nc7 Nc7 39.Rb6 Kf7 (39...Kf5 40.Rd6 Nf8+–) 40.Rb7 (40...Ke6 41.Rc7+–) 1–0. pierre (1990) – kostovist, internet, 2006.

10.Be2 dc4 11.Bc4 Bd7 12.Nc3 +=.

10.Be2 Nbd7 11.0–0 e5 (11...dc4 12.bc6 bc6 13.Bc4=) 12.bc6 (12.c5 Bc5 13.bc6 bc6 14.Ne5 Ne5 15.Be5 Bd6 16.Bd6 Qd6=) 12...bc6+= 13.cd5 cd5 14.d4 (14.Nc3 Qe7=) 14...e4 15.Ne5 Qc7 (15...Re8 16.Bb5+=) 16.Qc1 Qb8 (16...Qa7 17.Nc3 Ne5+= (worse is 17...Be5 18.de5 Ne5 19.Ne4+=)) 17.h3 (better is 17.Qb2!?+=) 17...Ne5–/+ (worse is 17...Be5 18.de5 Ne5 19.Qb2 Qb2 20.Bb2+=) 18.de5 Be5 19.Be5 Qe5 20.Qc3 Qg5 21.Kh1 Be6 22.Rc1 (22.Qd4 Rc8–/+) 22...h6 (22...Qf5 23.Kg1–/+) 23.Qd4 Rd8 (23...Ra8 24.Rc7–/+) 24.Nd2 Ne8 (24...Ra8 25.Rb1–/+) 25.Nb3 (25.Bb5 Nd6 26.Bc6 Rc8–/+) 25...Nd6 (25...Ra8 26.Ra1 Rb8 27.Nc5–/+) 26.Nd2 (26.Nc5 Qe7–/+) 26...Nf5 27.Qb6 Ra8 28.Qb2 Qh4 29.Kg1 d4! 30.Ne4 (30.ed4 Rd8 Decoy) 30...Ra2 (better is 30...de3 31.Bf3 ef2 32.Qf2 Qf4–/+) 31.Qb8= Kh7 32.Bf3 (32.Bd3!? de3 33.fe3=) 32...de3–/+ 33.fe3 Bd5 (33...Ra3!?+=) 34.Qb1 (34.Nf6 Qf6 35.Bd5 Rd2=) 34...g6 (34...Be4 35.Qe4 Qf2 36.Kh1 Ra5=) 35.Nf6 (35.Rd1 Ra5 36.Rd5 Rd5 37.Qb7+=) 35...Qf6–/+ 36.Bd5 Ra7 (36...Rd2!? 37.Qb3 Qe5–/+) 37.Rf1 Qe5 (37...Qg5 38.Qb3+=) 38.e4 Qd4 (38...Ng3 39.Rf7 Rf7 40.Bf7 Ne4 41.Qb7 Qd4 42.Kh2=) 39.Kh2 Qe5 40.Kg1 ½–½. mr5reasons1 (1680) – zakthegreat (1840), gameknot.com, 2013.

10.Be5 =+.

10.Ne5 Nbd7 11.Nd7 Qd7 12.Bf6 gf6 13.Nc3 +=.

10.Ne5 Nbd7 11.Nd7 Bd7 12.f3 (12.cd5 ed5 13.Bd3 Ng4=+) 12...dc4–/+ 13.bc6 Bc6 14.Bc4 Nd7 15.0–0 (15.g3 b5 16.Be2 Nb6–/+) 15...Qc7 (15...Bh2!? 16.Kh2 Qh4 17.Kg1 Qc4–/+) 16.f4=+ Bg2 17.Qg4 g6 18.Qg2 Qc4 19.Qb7 Rd8 (19...Nc5 20.Qb6 Qd5 21.Qb2=+) 20.Nc3 Bc7 (20...Qd3 21.Ne4=+) 21.Qg2 (21.d3 Qc5 22.d4 Qa5=) 21...Qd3=+ 22.Qc6 (22.Ne4 Ba5=+) 22...Bb6 (22...Ba5 23.Qa4 Bc3 24.Bc3–/+) 23.Ne4 Ba5 24.Rd1 (24.Bd4 Bb4= (24...Bd2? 25.Nd2 Qd2 26.Qc7+–)) 24...Bb4 (24...Qe2 25.Nf2=+) 25.Qc7= Be7 26.Qc3 Qc3 27.dc3 Nb6 28.Rd8 Bd8 29.Nd2 Nd5=+ 30.Kf2 Bf6 31.Nb1= Kg7 32.Kf3 Kh6 33.e4 Nb6 34.Nd2 Kh5 35.e5+= Be7 36.c4 Nd7 37.Bd4 Nb8 38.Ne4 Nc6 ½–½. Kleinke,Uwe – Magdeburg,W, corr DDR–ch I726, 1979.

10.Ne5 Nbd7 11.f4 Ne4 12.Nf3 Nb6 =+.

10.Ne5 Ne4 11.Nf3 =+.

10.Bf6 gf6 11.bc6 bc6 12.d4 +=.

10.Bf6 Qf6 11.Nc3 Rd8 =+.

10.Bf6 Qf6 11.d4 dc4 12.Bc4 Rd8 13.Qc2 =.

10.Bf6 Qf6 11.d4 Nd7 12.c5= Bc7 13.b6 Bb8 14.g3 (14.Be2 e5=) 14...e5 15.h4? (better is 15.Be2=+) 15...ed4–+ 16.ed4 Re8 (17.Kd2 Qh6 18.Kc2 Nf6–/+) 0–1. Landgraf,M – Strand,T, corr SOK–90–58, 1990.

10.Nc3 Nbd7

11.d4 Bb4 12.Qa4 c5 13.dc5 Bc5 14.cd5 Nb6 =.

11.d4 Bb4 12.Qa4 Qe7 =.

11.Be2 dc4 12.Bc4 Nb6 13.Be2 =.

11.Be2 c5 12.0–0 dc4 13.Bc4 e5 14.d3 (14.Qc2 Nb6 15.Be2 Qe7=) 14...Nb6 15.Qc2 (15.Bb3 Bf5=) 15...Qe7 16.e4 (16.Nd2 Bg4=) 16...Nh5 17.g3 (17.Bb2 Bg4 18.Nd2 Qg5=+) 17...Qf6 (17...Rd8 18.Nd2=+) 18.Nd2 (18.Ne1 Qg6=+) 18...Bh3 19.Re1 Qh6 (19...Nf4 20.Bb3=+) 20.Ne2 (20.Nd5!? Nd7 21.Bb2=) 20...Nf6 21.Nf1 (21.Bb3 Ra8=+) 21...Ng4–/+ 22.Qd2 Qf6 (22...Qh5 23.Ne3–/+) 23.f4=+ Ra8 24.Bb2 Bc7 25.Ne3 Ne3 26.Qe3 Nc4 27.dc4 ef4 28.Bf6? fe3–+ 29.Bg5 Ra3 30.Nc1 Be5 31.Be3 b6 32.Rd1 f6 33.Kf2 Rc3 34.Nd3–/+ Bg4 35.Rd2 Bc7 36.Nb2 Be6 37.Bf4 Bf4–/+ 38.gf4 Kf8 39.f5 Bc4 40.Na4 Rh3 41.Kg2 Re3 42.Nb6 Bb5 43.Rc2 Re4 44.Rc5–/+ Re5 45.Re5 fe5 46.Kf3 Bc6 47.Kg4 Ke7 48.Nc4 Kf6 49.Nd6 h6 50.h3 Bd7 51.Ne4 Ke7 52.h4 g6 53.Ng3 Kf7 54.h5 gf5 55.Kf3 Kf6 (56.Kf2 Kg5–+; 55...Ke6 56.Ne2–+) 0–1. Gerold,Guenter – Siegmund,Rainer, corr DDR–ch M525, 1968.

11.Be2 Qc7 12.Na4 cb5 13.cb5 e5 14.b6 =+.

11.Be2 Qc7 12.Na4 e5 13.c5= Bc5 (13...Nc5 14.Nc5 e4 15.Bf6 Bc5=+) 14.Be5 (better is 14.Nc5 Nc5 15.Be5+=) 14...Ne5–/+ 15.Nc5 cb5 (15...Nf3!? 16.Bf3 Qb6–/+) 16.Ne5=+ Qc5 (16...Qe5 17.d4 (17.Bb5? d4–+) 17...Qg5 18.0–0= (18.Bb5? Qg2 19.Kd2 b6–+)) 17.0–0 Ne4 (17...d4 18.Nf3 de3 19.fe3=+) 18.d4= Qa3 19.Bb5 Nc3 20.Qd3 Nb5 (better is 20...Qb2!? 21.Bd7 Bd7 22.Nd7 Ra8=) 21.Qb5+= Rd8 22.Nd3 Qa6 23.Qa6 ba6 24.Ra1 Rd6 25.Nc5 Rb6= 26.Kf1 Kf8 27.Ke1 Ke7 28.Kd1 Kd6 29.Kc2 Kc6 30.Nb3 Rb4 31.Ra5 Rb5 32.Ra3 Rb4 (33.f3 Kb5=). Turcot,J – Herborn,H, corr, 1975.

11.Be2 Qc7 12.bc6 bc6 13.d4 Ba6 =.

11.Be2 e5 12.d4 =+.

8.Nf3 c5

9.c4 0–0 10.Be2 Nbd7 11.0–0 Qc7 12.Qc2 b6 13.d3 dc4 14.dc4 Bb7 15.h3 Ra8 16.Nc3 Ra5 17.Bb2 Ba8 18.Rd1 Ne5 19.Nd2 Qb7 20.e4 Bc7 21.f4 Ng6 22.g3 h5 23.Bf3 Qb8 24.e5 Nh7? 25.Bh5+– Be5 26.Bf3?? Bd4= 27.Kg2 Nf6 28.Ne2 e5 29.fe5 Qe5 30.Nd4 cd4 31.Nb3 Nh5 32.Qf2 Ra2?? 33.Rd2?? Qg5 34.Ba8+/– Ra8 35.Bd4 Ra3= 36.Be3 Qe5 37.Rd5 Qe4 38.Qf3 Ra2? 39.Nd2+– 1–0. Melich,Jindrich (2150) – Chrz,Pavel (2155), CZE–chT2b, 2001.

9.c4 Nbd7 10.d3 0–0 11.Be2 Qc7 12.0–0 e5 13.g3 e4 14.de4 de4 15.Nfd2 Ne5 16.Nc3 Bh3 17.Nce4!? Ne4 18.Ne4 Bf1?! 19.Kf1! Be7 20.Bc3 Rd8 21.Qa1 h6?? 22.Be5 1–0. mtr – bakkeljauw, Caissa's Web, 2001.

8.Nf3 c6

9.c4 0–0 10.Be2 dc4 11.Bc4 cb5 12.Bb5 =+.

9.c4 0–0 10.Be2 Nbd7 11.0–0 Qa5 (11...cb5 12.cd5 Nd5 13.e4=+) 12.Bc3= Bb4 (12...Qb6 13.bc6 bc6 14.d4=) 13.Qb3+= Bc3 14.Nc3 dc4 (14...Ne4 15.Rc1+=) 15.Bc4 Nc5 (15...cb5 16.Bb5 e5 17.Rb1+=) 16.Qb2 Qc7 (16...cb5 17.Nb5 Na4 18.Qe5+=) 17.d4+/– Nce4 (17...Ncd7 18.bc6 bc6 19.Ra1+/–) 18.Ne4 Ne4 19.Bd3 Nf6 20.bc6 bc6 (20...Qc6 21.Ra1+/–) 21.Rc1 Bd7 22.Ne5 Rc8 (22...Qd6 23.Qc2+/–) 23.Qc2 (23.Qa3 Nd5+/–) 23...g6 (23...Qd6 24.f3+/–) 24.Ba6 (24.Qe2 Ra8+–) 24...Ra8+/– 25.Nd7 (better is 25.Bb5+/–) 25...Ng4?? (better is 25...Qd7 26.Qc6 Qc6 27.Rc6 h6+/–) 26.Qc6+– Qh2 27.Kf1 Ra6 (27...Rd8 28.Bb5 Qh4+–) 28.Qc8 (28...Kg7 29.Qf8#) 1–0. Grossmann,Philipp (1910) – Werner,Andreas (1900), RLNO_Kareth1–SWNbg2, 2005.

9.c4 0–0 10.Be5 Be5 11.Ne5 cb5 12.cb5 Ne4 =+.

9.c4 cb5 10.cb5 0–0 11.Be2 Nbd7 12.0–0 Nc5 (12...e5 13.Nc3+=) 13.Be5 Be5 (13...Qe7 14.Bd6 Qd6 15.Qc2+=) 14.Ne5 Nfe4 (14...Ncd7 15.d4+=) 15.Qc2+= Nd7 16.Nf3 Ndf6 17.Nc3 (17.Rc1 Bd7 18.Ne5 Qe7+=) 17...Bd7 (17...Qd6 18.Qb2=) 18.Ne4 Ne4 19.Bd3 (19.Rc1 Qa8=) 19...Qa5 20.Be4 de4 21.Qe4 Bb5 22.Qe5 (22.Rb1 Bc6 23.Qe5 Qd5=) 22...Qb4 (22...Ra8 23.Rb1=) 23.Rc1 Bc6 24.Qd4 Qa5 25.Ne5 Qd5 (25...Rd8 26.Ra1 Qd5 27.Nc6 bc6 28.Qd5 cd5 29.h4=) 26.Nc6 bc6 27.Qc3 Rc8 28.d4+= Qd6 29.Qa5 Kf8 30.h3 h6 31.Qa6 Rc7 32.Rc5 Ke7 33.Qb6 f6 34.Qb8 Qd8 35.Qb1 Kf7 36.f4 f5 37.Qb3 Qd7? 38.Rf5+– Kg8 39.Re5 Kf7 40.f5 Kg8 41.fe6 Qe7 42.Qb8 Kh7 43.Qc7! Qc7 44.e7 (44.e7 c5 45.e8Q cd4 46.ed4 Qc1 47.Re1+–) 1–0. Schulze,Harald (2115) – Kinkelin,Ulrich (1950), Bayern Landesliga Nord, 1998.

9.c4 dc4 10.Bc4= Nbd7 (10...0–0 11.Nc3 (11.0–0 cb5 12.Bb5 Bd7 13.Bf6 Qf6 14.Nc3 Qe7 15.Qb3 Nc6 16.d4=; 11.bc6 Nc6 12.d4 Qd7 13.0–0 Rd8 14.Qe2 Ng4 15.Rc1 Qc7 16.h3=) 11...Bd7 12.0–0 Qc7 13.Qb3 b6 14.d3 Ng4 15.h3 Nh2 16.Nh2+=; 10...cb5 11.Bf6 (11.Bb5 Bd7 12.Qb3 Nc6 13.d3 0–0 14.0–0 Qe7 15.Nbd2 Na5 16.Bf6=; 11.Be2 0–0 12.0–0 Bd7 13.Bf6 Qf6 14.Nc3 Qf5 15.Nd4 Qg6 16.Ndb5+=) 11...Qf6 12.Bb5 Nd7 13.Nc3 Qg6 14.Nh4 Qh6 15.Qa4 Kd8 16.Bd7+=) 11.bc6 (11.0–0 Nb6 12.Be2 cb5 13.Bb5 Bd7 14.Bf6 Qf6 15.Bd7 Nd7 16.Qa4=; 11.Qc2 cb5 12.Bb5 0–0 13.0–0 b6 14.d3 Bb7 15.e4 e5 16.Nbd2=) 11...bc6 12.0–0 (12.d4 0–0 13.0–0 Nb6 14.Bd3 Bb7 15.Nbd2 Nbd5 16.e4=) 12...c5 (12...Nb6 13.Be2 0–0 14.Qc2 c5 15.d4 cd4 16.Bd4=) 13.Na3 0–0 (13...Bb7 14.d3 0–0 15.Nb5 Be7 16.Qe2=) 14.Nb5 (14.Qb3 e5 15.Nb5 Bb8 16.d3+=) 14...Bb8 (14...Be7 15.Qc2 Bb7 16.Be2=) 15.Qc2 (15.d3 Bb7 16.e4=) 15...Nb6 (15...Bb7 16.Rb1= (16.d3=)) 16.Ba2 (16.Bf6 Qf6 17.Bd3 Qh6 18.Qc5 Bb7+/–) 16...Ba6 17.Rb1 Nbd5 (17...Bb7 18.Ng5 Nbd5 19.f3= (19.Qc5 Nd7 20.Ne6 fe6–/+)) 18.Bc4 (18.Qc5!? Qd7 19.Bd5 Nd5 20.Nc3+=) 18...Nb4= 19.Qb3 Nfd5 20.d4 cd4 (20...Bb5 21.Bb5 Qb6 22.e4 Qb5 23.ed5+/–) 21.Bd4 (better is 21.e4!? Bb5 22.Bb5+–) 21...Bb5 22.Bb5 Bd6 23.Be5 ½–½. algernon (2555) – averoes (2510), net–chess.com, 2014.

9.Be5 0–0 =.

8.f4 0–0

9.Nf3 c5 10.Be2 Nbd7 11.0–0 b6 12.c4 Bb7 13.cd5 Nd5 14.Na3 Qe7 15.Nc4 Bc7 16.Qe1 Rd8 17.Qg3 f6 18.Bb2 Nf8 19.d4 Qe8 (19...Ng6 20.Ba1=) 20.dc5+= Qb5 21.cb6 Bb6 22.Nd4 Bd4 23.Bd4 (< 23.ed4 Nb6 24.Qc3 Rc8–/+) 23...Qb4 24.Rc1 Ba6 25.Qf3 Rc8 (25...Qb3 26.Qe4+=) 26.Qf1 Nd7 27.Rb1 Qf8 28.Ra1 Rc6 29.Nd2 Be2 30.Qe2 Qb8 31.Qg4 Nf8 (31...Qe8 32.Nf3=) 32.Ne4 e5 (32...Ng6 33.Nc5 Qc8 34.Nd3=) 33.fe5 fe5 34.Qf5 Ne7 (34...g6 35.Qg5 h6 36.Be5 hg5 37.Bb8 Ne3 38.Kf2+/–) 35.Be5+= (< 35.Qe5 Qe5 36.Be5 Re6 37.Bg7 Re4 38.Bf8 Kf8–/+) 35...Nf5 36.Bb8 Ne3 37.Kf2 Nd5 (37...Nc4 38.Ra7=) 38.Bd6 (38.Ra7 Nf6 39.Kf3 Ng6+=) 38...Nc3 39.Nc3 Rd6 40.Ne4 Rb6 41.Ra7 h6 42.Ng3 (42.h4 h5+=) 42...Rf6 (42...Rb2 43.Kf3=) 43.Ke3 Rf7 44.Ra8 Kh7 45.Ne4 Ng6 46.g3 ½–½. Cottarelli,Franco – Feilmayr,Erwin, corr ICCF TT, 2007.

9.Nf3 c6 10.Nc3 Nbd7 11.Be2 e5 12.fe5 Ne5 13.0–0 Nfg4 (13...Nf3 14.Rf3 Qc7 15.g3=+) 14.h3 (14.Ne5 Ne5 15.Bb2 Qg5=+) 14...Nf3=+ 15.Bf3? (better is 15.Rf3!? Nh2 16.Rf4=+) 15...Nh2–+ 16.Rf2 Qg5 (16...Bg3 17.Qe2–+) 17.g4 Nf3 18.Qf3 f5 19.Qg2 fg4 20.hg4 (20.Rf8 Kf8 21.Bb2 Ke8–+) 20...Rf2 21.Kf2 Bg4 22.Ne2 (22.Kg1 Qh5 23.Ne2 h6–+ (< 23...cb5 24.Nf4 Bf4 25.ef4–/+)) 22...Qh4 23.Ng3 h5 (23...Bf5 24.bc6 bc6 25.d3–+) 24.bc6 bc6 25.Bc3 (25.Bd4 Bf5 26.d3 Bh3–+) 25...Qg5 (25...Bd1 26.Qg1–+) 26.Nf1 (26.Qh1 Kf7–+) 26...Qf5 27.Kg1 Qc2 28.Qf2 Qg6 29.Kh1 Qe4 30.Kg1 Bf3 31.Nh2 Qg6 32.Kf1 Qb1 33.Qe1 Qe1 34.Ke1 Bh2 35.Kf2 Be4 36.d4 h4 37.Be1 0–1. Szewczak,Andrzej – Szopieraj,Dariusz (2155), Polanica Zdroj op, 1996.

9.Nf3 c6 10.Be5 Ne4 =.

9.Nf3 Nbd7

10.Be2 c5 11.0–0 Qa5 12.Bb2 =.

10.Be2 c5 11.0–0 b6 12.Nc3 Bb7 13.Qe1 d4 (13...Qc7 14.Qh4=) 14.ed4 Bf4 15.dc5 Nc5 16.Nb1 Ncd7 17.Nd4 (17.Bd4 Qc7 18.g3 Bd6=+) 17...Qc7=+ 18.Qh4 e5 19.g3 Qc5 (< 19...ed4 20.Qf4 Qc2 21.Bd4=) 20.gf4 ed4 21.Qf2 Qc2 22.Bd4 Qg6 (22...Re8 23.Nc3=+) 23.Qg3= Qe4 24.Bf6 Nf6 (24...Qe2?? 25.Qg7) 25.Bf3 Qe7 26.Bb7 Qb7 27.Nc3 Qd7 28.Rf2 Re8 29.f5 Re1 (29...Qd4 30.Qf4 Re1 31.Kg2=+) 30.Kg2 h6 31.h3 Qd4 32.Qf4 Ne4 33.Ne4 Re4 34.Qb8 Kh7 35.Qb7 f6 36.Qf7 Qd3 37.Qg6 Kg8 38.Qg3 Qb5 39.Rf4 Re2–+ 40.Rf2 Qd5 41.Kf1 Rd2 42.Rd2 Qd2 43.Qb8 Kh7 (44.Qb6 Qd3 45.Kg2 Qf5–+) 0–1. Achermann,Josef (1685) – Ould Ahmed,Samy (2155), Telechess, 2004.

10.Be2 c5 11.bc6 bc6 12.0–0 Qc7 13.c4 Ba6 14.cd5 (14.Bf6!? Nf6 15.c5 Be2 16.cd6 Bd1 17.dc7 Bf3 18.Rf3–/+) 14...Be2=+ 15.Qe2 ed5 16.Nc3 (16.Qd3 Ra8 17.Bf6 Nf6=+) 16...Re8 (16...Rb8 17.Qe1=+) 17.Qd3 Bc5 (17...Nc5 18.Qc2=+) 18.Ne2 Bd6 (18...Ne4 19.Bd4=) 19.Rc1 (19.Qf5 c5=) 19...Nc5 (19...Ne4 20.Bd4=) 20.Qc2 Nb3?? (better is 20...Nfd7=) 21.Qb3+– 1–0. pcmvr (2835) – woudstra (2730), net–chess.com, 2006.

10.Be2 Re8 11.Ne5 c6 12.bc6+= bc6 13.Nc6 Qb6 14.Ne5 Ba6 15.0–0 Be2 16.Qe2 Rc8 (16...Ra8 17.Bd4 Bc5 18.Bc5 Nc5 19.c4+=) 17.Bd4 (17.Nd7 Nd7 18.Qg4 g6+/–) 17...Bc5+= 18.c3 (18.Bc5 Qc5 19.Nd7 Nd7+=) 18...Ra8 19.d3 (19.Bc5 Nc5 20.c4 dc4 21.Nc4 Qb3+=) 19...Ra1 20.Qc2 Qa7 21.Qb3 Ra2 (21...Qc7 22.Qb2 Ra4 23.c4+=) 22.Rf3 (22.Nd7 Nd7 23.f5 Qa4 24.Qa4 Ra4+=) 22...Re2 (22...Ra1 23.Rf2+=) 23.Kf1 Ra2 24.Nc6 Qa8 25.Nb4 (25.Qb5 Bd4 26.Nd4 Ra6+=) 25...Ra1 26.Kg1 Ng4 (26...Bd4 27.cd4 Qa4 28.Qa4 Ra4 29.Nc2+=) 27.Nc2 Ra7 28.Rg3 Ngf6 29.Nb4 Ra1 30.h3 (30.Bc5 Nc5 31.Qb2 Qa4+=) 30...Ne8 31.Nc2 Ra7 32.Rf3 Rb7 33.Nb4 Nd6 34.Na3 Nf5 35.Nac2 Be7 36.Kh2 Qa5 37.Rf1 Nc5 38.Bc5= Qc5 39.e4 de4 40.de4 Nd6 41.e5 Ne4 42.Qa4 Ra7 43.Qe8 Bf8 44.Rd1 Nc3= 45.Rd8 Ne2 46.Nd4 Nd4 47.Nd3 Qa3 48.Rd4 Ra8 49.Qc6 Qa5 ½–½. pcmvr (2800) – rcastaneda (2725), net–chess.com, 2006.

10.Be2 Re8 11.Ne5 Ne4!? 12.0–0 f6 13.Nd7 Qd7 =.

10.Be2 Re8 11.Ne5 Ne4 12.0–0 f6 13.Nd7 Bd7 14.c4 (14.d3 Nc5 15.Nc3 Qe7=) 14...Bf8 (14...dc4 15.Qc2 Nc5 16.Bc4+=) 15.Nc3 Nc3 16.Bc3 Qe7 (16...c6 17.Bh5 g6 18.bc6 Bc6 19.cd5 Bd5 20.Bf3=) 17.Qc2 c6 (17...Ra8 18.d4+=) 18.b6 (18.Bd3 g6+=) 18...Ra8 19.d4 Be8 (19...c5 20.Bf3+=) 20.Bd3 f5 ½–½. pcmvr (2610) – garompon (2540), net–chess.com, 2006.

7.Ba1 Bd7

8.c4 c6 9.Qb3 (9.cd5 Nd5 10.bc6 Nc6=) 9...Be7 (9...Bd6 10.Nf3=+) 10.Nf3= 0–0 11.Be2 (11.Bd4 dc4 12.Bc4 cb5 13.Bb5 Nc6=) 11...Qb6 (11...dc4 12.Bc4 cb5 13.Bb5 Bb5 14.Qb5=) 12.Nc3 (better is 12.0–0=) 12...Na6?? (better is 12...cb5 13.Nb5 dc4 14.Bc4 Nc6=) 13.Na4+– Nc5 14.Bf6 Bf6 15.Nb6 Nb3 16.Nd7 Ra8 17.Nf6 gf6 18.0–0 e5 19.bc6 e4 20.cb7 Rb8 21.Nd4 Nd2 22.Rd1 Nc4 23.Nf5 Rb7 24.Bc4 (24...h5 25.Bd5+–) 1–0. De Visser,Arno – Ruiter, 1981.

8.c4 Be7 9.Nc3 0–0 10.Nf3 c6 11.Be2 Qa5 12.Ne5 Be8 13.0–0 dc4 14.Nc4 Qc7 15.bc6 Bc6 16.d4 Rd8 17.Qb3 Nbd7 18.Nb5 Qb8 19.Bc3 Nd5 20.Bd2 N5b6 21.Nb6 Nb6 22.Ba5 Bd5? (better is 22...Bb5!? 23.Qb5 Rd5 24.Qb6 Bd8+=) 23.Qb1+– Nc4 24.Bc4 Bc4 25.Bd8 Bf1? (better is 25...Qd8 26.Rc1 Qd5+–) 26.Be7 (26.Qf1?! Qd8 27.Qa1 Qe8=) 26...Qe8 27.Qf1 Qe7 28.Qc4 h6 29.g3 Qd7 30.Qc5 Qd8 31.Nd6 b6 32.Qc8 (better is 32.Qc6 g5+–) 32...Qc8 33.Nc8 b5 34.Kf1 Kf8 35.Ke2 b4 36.Kd3 Ke8 37.Kc4 Kd7 38.Nb6 Kc6 39.Na4 f5 40.Kb4 Kd5 41.Nc3 Kd6 1–0. Aspinall,John (1820) – Trier,Marc (1670), FRA–chT4, 2009.

8.Nf3 Bb4 9.c4 (9.Be2 0–0=) 9...0–0 10.Qb3 Qe7 (10...Ba5 11.Bd4=) 11.Be2 (11.Bf6!? gf6 12.cd5+/–) 11...c6 (11...dc4 12.Qc4 Bd6 13.Be5=) 12.Ne5 (12.Bf6!? gf6 13.cd5 cd5 14.0–0+=) 12...dc4=+ 13.Bc4 cb5 14.Nd7 Nbd7 15.Bb5 Nc5 (15...Ra8 16.Bf6 Nf6 17.0–0=) 16.Qc4 Ra8 (better is 16...Ncd7!?=) 17.Bf6+/– gf6 18.Qg4 (18.0–0 Na6+=) 18...Kh8+= 19.0–0 Nb3 20.Qh4 (20.d4 f5 21.Qe2 Qd6+=) 20...f5 (20...Ra5 21.Bc4 Nd2 22.Nd2 Bd2 23.Bd3+=) 21.Qc4 Na5 22.Qc2 Qf6 23.d4 Bd6 24.f4 Nc6 25.Bc6 bc6 26.Qc6+/– Rd8 27.Nd2 Qg7 28.Rf3 Qg4 29.Qc3 (29...Be7 30.Qc7+/–; 29.Nc4 Rg8 30.Rf1 Bc7+–) 1–0. Kilpatrick,Robert – Pollard,Alan J, corr SCCA, 1978.

8.Nf3 c6 9.bc6 Nc6 10.Bb5 Be7 (10...Bd6 11.0–0=) 11.0–0 0–0 12.d3 Ne8 (12...Qa5 13.Nc3=) 13.Bc6 (13.c4 Nd6=) 13...bc6 14.Ne5 Bf6 (14...f6 15.Nd7 Qd7 16.Qg4=) 15.Nd2 Be5 (15...Qc7 16.Nd7 Qd7 17.Qf3=) 16.Be5 f6 17.Bg3 (White gets the initiative) 17...e5 (17...Qe7 18.c4=) 18.f4 Qe7 19.fe5 fe5 20.Rf8 Kf8 21.c4 Nf6 22.Qb3 Qc5 (22...e4 23.d4=) 23.Qb8 Kf7 24.Qe5 Be6 (better is 24...Qa3=) 25.Nf3+/– h6 (25...Bg4 26.Qc7 Kg8 27.Qb8 Qf8 28.Qf8 Kf8 29.cd5 cd5 30.Kf2+/–) 26.h3 (26.Qc7 Kg6 27.Qf4 Qa3 28.cd5 Qc1 29.Ne1 cd5+/–) 26...dc4?? (better is 26...Qa3 27.Qb8 Nd7+–) 27.Qc5+– (27...cd3 28.Ne5 Kg8 29.Qc6+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

8.Nf3 Bd6 9.Be5 =.

8.Nf3 Qe7 9.Ne5 c6 10.Nd7 Nbd7 11.c4 dc4 12.Bc4 cb5 13.Bb5 Qb4 14.Nc3 Be7 15.0–0 0–0 16.Qe2 Ra8 17.Rb1 Qc5 18.Na4 Qc2 19.Bd3?? Qa4–+ 20.Bd4 Bc5 21.Bc3 Ne4 22.Bb5? Nc3 23.dc3 Qa2 24.Qa2=+ Ra2 25.Bd7 g6 26.c4 b6 27.Bb5 Kg7 28.g3 h5 29.e4? Rf2–/+ 30.Kh1 Re2 31.Bc6 Rc2 32.Rd1 Rc4 33.Rd7 Bd4 34.Bb5 Rc1 35.Kg2 Rc2 36.Kf3?? Rc3 37.Ke2 Rc2?? 38.Kd3 Rh2 39.Rd4 Rg2–/+ 40.Rd7 Rg3 41.Kd4 h4 42.Bc4 Kh6 43.Rf7= h3 44.Be6 h2 45.Rh7?? Kh7–+ 46.e5 h1Q 47.Bd5 Qh4 48.Be4–+ Rg4 49.Kd5 Re4 50.Ke6 Qg5 51.Kd6 Qe5 52.Kc6 Re1 53.Kb7 ½–½. ZZMeB4 (1695) – look (1710), caissa.com, 2007.

8.Nf3 Be7 9.c4 (9.Be2 0–0=) 9...0–0 10.Nc3 (10.Qc2 c6=) 10...c6 11.Ne5 (11.cd5 ed5 12.Be2 Re8=) 11...Be8 12.bc6 bc6 (12...Nc6 13.Nf3=) 13.cd5 (13.d4 Bd6=) 13...cd5=+ 14.Be2 Nc6 15.Nc6 (15.Nf3 e5 16.Nb5 Qb8=+) 15...Bc6 16.0–0 (16.d4 Bd6=+) 16...Qd6 (16...d4 17.ed4 Qd4 18.d3–/+) 17.h3 (17.d4 Ra8=+) 17...Rd8 (17...d4 18.ed4 Qd4 19.d3=+) 18.Qc2 (18.d4 Ra8=+) 18...Nd7 (18...d4!? 19.Nb1 de3 20.de3 Be4=+) 19.d4 (19.Rb1 Rb8=) 19...h6 (19...Nf6 20.Bd3=) 20.Bd3 (20.Bb2 Ra8=) 20...Nf6 (20...Rb8 21.Rb1=) 21.Ne2 (21.Rb1 Ra8=) 21...Bd7 (21...Rc8 22.Nc3=) 22.Bc3 Rc8 23.Rb1 Qa3 24.Rb3 (24.Qb2 Qb2 25.Rb2 Ba4=) 24...Qa4 (24...Ba4 25.Bb4 Qa1 26.Qb1 Qb1 27.Rb1 (27.Bb1? Bb3 28.Be7 Bc2 29.Bc2 Rc2 30.Bf6 Re2–+) 27...Bb4 28.Rb4=) 25.Qb2 (25.Qb1 Bd8=) 25...Ne8 (better is 25...Ne4=) 26.Rb8?? (better is 26.Qb1+=) 26...Qd1–+ 27.Kh2 Bd6 (28.g3 Rb8–+) 0–1. Wall,Bill – Wall,Steve, Stony Point, NC, 1975.

8.c4 dc4

9.Bc4 c6 10.Nc3 =+.

9.Bc4 Be7 10.Nf3 0–0 11.0–0 c6 12.Nc3 cb5 13.Bb5 (13.Nb5!!+=) 13...Bb5 14.Nb5 Qd7 15.Qb3 Na6 (15...Nc6) 16.d4 Nd5 17.Rc1 Rc8 18.Rc8 Qc8 19.Bb2+= h6 20.h3 Nac7 21.e4 Nb5 22.ed5 (22.Qb5!) 22...ed5?? (22...Nd6–+) 23.Qb5+– Qc6 24.Qc6 bc6 25.Ne5 c5 26.Ba3 f6 27.Nf3 Kf7 28.Bc5 Bc5 29.dc5 1–0. Wilting – Windridge, 1969 (Adam).

7.Ba1 Nbd7

8.c4 Bb4 9.Nf3 0–0 10.Qc2 c5 11.bc6 bc6 12.cd5 cd5 13.Be2 Bd6 14.Nc3 Qa5 15.Qa4 Qa4 16.Na4 Bb7 17.0–0 Ra8 18.Nc3 Ba6 19.Bb5 Bb5 20.Nb5 Bb4 21.Bf6 gf6 22.Rb1 Ne5 23.d4 Nc4 24.Nc7 Ra2 25.g3 Nb2 26.Na6 Bd6 27.Nc5 Nc4 28.h3 f5 29.Rb7 h6 30.Nd7 Kg7 31.Nde5 Ne5 32.Ne5 Be5 33.de5 Kg6 34.Kg2 Rc2 35.Kf3 f6 36.Re7 Rc6 37.Kf4 h5 38.h4 Rc4 ½–½. Schaar,Joerg (2100) – Paz,Gustavo (2185), CiF–7er/0078, 2011.

8.c4 dc4 9.Bc4 Nb6 10.Be2 Be7 11.Nf3 0–0 12.Qc2 Nfd5 13.0–0 Bf6 (13...f6!?=) 14.Bf6+= Qf6 15.Re1 (15.d4 Qh6+=) 15...Qd8 (15...e5!?=) 16.Rc1 Bd7 17.g3 c6 18.bc6 Bc6 19.Ne5 Nb4 20.Nc6 Nc6 21.Bf3 Nb4 22.Qc7 Nd3 23.Qd8 Rd8 24.Rc7 Ne1 (24...g5 25.Kf1+=) 25.Bb7 Rb8 (25...Nd3 26.Be4 f5 27.Bd3 Rd3 28.f4+/–) 26.Nc3 Na8 27.Ba8 Ra8 28.d4 h6 29.Ne2 Ra2 30.Nc1 Ra1 31.Nb3 Rb1 32.Rc8 Kh7 33.Rc1 Nf3 34.Kg2 Nh4 35.gh4 Rb3 36.Rc7 Kg6 37.h5! Kf6 38.e4 e5 39.d5 Rd3 40.Rc6 Ke7 41.Rc7 Ke8 42.f3+/– Rd2 43.Kg3 Rd1 44.h4 Rg1 45.Kh2 Rd1 46.Rc8 Ke7 47.Rc7 Kf6 48.Rd7 Rd2 49.Kg3 Rd1 50.Kf2 Rd2 51.Kg3 Rd1 52.Rc7 Rg1 53.Kh2 Rd1 54.Rc6 Ke7 55.Rc2 f5 56.Rg2 Kf7+= 57.Rg6 fe4? 58.fe4+/– Re1 59.Rg4 Re2 60.Kg3 Rd2 61.Rg6+– Rd4 62.Kf3 Rd1 63.Re6 Rf1 64.Kg3 Rg1 65.Kf2 Rg4 66.Re5 Rf4 67.Kg3 Rf1 68.d6 Kf6 69.Rf5! Rf5 70.ef5 Kf7 71.Kf4 Ke8 72.Ke5 Kd7 73.Kd5 (73.Kd5+–) 1–0. Huelle,Gunter (1840) – Werther,Jens, Leipzig VfB op, 2007.

8.c4 Bd6 9.Qc2 c5 10.bc6 (10.Nf3 0–0 (10...b6 11.Nc3 0–0 12.Bb2 Bb7 13.cd5 ed5 14.Be2 Qe7) 11.Bd3 Qc7 12.Nc3 b6 13.cd5 ed5 14.0–0 c4; 10.Be2 0–0 (10...b6 11.Nf3 0–0 12.0–0 Bb7 13.cd5 ed5 14.Nc3 Qe7) 11.Nf3 b6 12.Nc3 Bb7 13.cd5 ed5 14.0–0 Qe7) 10...bc6 11.Be2 (11.cd5 cd5 12.Qc6 Be7 13.Nf3 0–0 14.Bd4 Qa5) 11...e5 (11...0–0 12.Nf3+= (12.cd5 cd5 13.Nf3 Bb7 14.0–0 Qa5) 12...Ba6 13.Bf6 Qf6 14.cd5 Be2) 12.Nf3 (12.cd5 cd5 13.Nf3 0–0 14.0–0 e4) 12...0–0 13.d4 (13.cd5 cd5 14.0–0 e4) 13...e4 14.Nfd2 Qa5 (14...Bb7 15.0–0=) 15.Bb2= Ba6 16.0–0 Qc7 17.g3 Nb6 18.Nc3 Nc4 19.Bc4 Bc4 20.Nc4 dc4 21.Ne4 Ne4 22.Qe4 Qb7 23.Bc3 Rb8 24.Kg2 h6 (24...Qd7 25.Ra1 f5 26.Qc2+=) 25.Ra1+= Be7 26.Be1 Qd7 27.Ra5 Bf8 28.Qc2+= Qb7 29.Qc4 Qb1 30.Bd2 Rb2 31.Bc1 Qe4 32.Kg1 Rc2 33.Qf1 c5 34.Ra4 h5 35.h4 Qg4= 36.Ba3 Rd2 37.Ra8 Rd1 38.Bc5 Rf1 39.Kf1 g5 40.Bf8 Kh7 41.hg5 h4 42.gh4 Qd1 43.Kg2 Qg4 44.Kh2 Qh4 45.Kg1 Qg4 46.Kf1 Qd1 47.Kg2 Qg4 48.Kf1 Qd1 49.Kg2 Qg4 50.Kf1 Qd1 ½–½. Luzuriaga,Norberto Horacio (2335) – Daatselaar,Jan Bart (2175), corr ICCF WSTT/3/06/Final, 2009.

8.d4 c5 9.bc6 bc6 10.Bd3 c5 11.c4 cd4 12.Bd4 Qa5 13.Bc3 Bb4 14.Qd2 Ne5 15.Be2 (15.Be5 Bd2 Pinning (15...Bd2 Deflection)) 15...Bc3 16.Qc3 Qc3 17.Nc3 Nc4 18.Bc4 dc4 19.Nf3 Ke7 20.Ke2 Bb7 21.Ra1 Ra8 22.Ra8 Ba8 23.Ne5 Bg2 24.Nc4 Bb7 25.Ne5 Ne4 26.Ne4 Be4 27.f3 f6 28.Nc4 Bd5 29.Nd2 e5 30.e4 Be6 31.Ke3 h5 32.Nf1 h4 33.Kd3 Kd6 34.Ne3 Kc5 35.Kc3 Bh3 36.Kd3 Be6 37.Kc3 Bh3 38.Kd3 Bd7 39.Kc3 Be6 40.Kd3 g6 41.Ng2 h3 42.Ne3 f5 43.ef5 gf5 44.Nd1 Bd5 45.Ne3 f4 46.Ng4 Kd6 (46...Bf3?! 47.Ne5 Bg2 48.Ng6=) 47.Ke2 Be6 48.Nf2 Bf5 49.Kd2 Kd5 50.Kc3 Be6 51.Kd3 Bf5 52.Kc3 Kd6 53.Kd2 Kc5 54.Kc3 Kd5 55.Kd2 Kd4 56.Ke2 Bc8 57.Kd2 Bf5 58.Ke2 Kc3 59.Nd1 Kc4 60.Nf2 Kc3 61.Nd1 Kd4 (better is 61...Kb4–+) 62.Nf2= ½–½. Henke,Simon – Richter,Klaus, RD–2010–0–00048, 2011.

8.Nf3 b6 9.c4 (9.Be2 Bd6=) 9...Bb7 (9...Bd6 10.cd5 ed5 11.Be2=) 10.Be2 (10.Nc3 c5=) 10...Be7 (10...dc4 11.Bc4 Bd6 12.d4=) 11.0–0 (11.cd5 Nd5 12.Nc3 0–0=) 11...0–0 (11...dc4 12.Bc4 Qa8 13.Bc3=) 12.d4 Qa8 (12...c6 13.bc6 Bc6 14.cd5 Nd5 15.Qb3=) 13.Nc3 (13.Nbd2 dc4 14.Bc4 Bb4=) 13...Qa3 (13...dc4 14.Bc4 Rc8 15.Be2=) 14.Qc2 (14.cd5 ed5 15.Qc2 Qd6+=) 14...Bd6 (14...dc4 15.Nd2=) 15.Bb2+= Qa8 (15...Qb4 16.cd5 Nd5 17.Ng5+=) 16.Ra1+/– Qb8 17.h3 (17.cd5 ed5 18.Bd3 c5+=) 17...Rc8 (17...c5 18.bc6 Bc6 19.cd5 Nd5 20.Ne4+=) 18.Qa4 (18.cd5 ed5 19.Qf5 c5+=) 18...Ne4 (18...c6 19.cd5 cd5 20.Bd3=) 19.Qa7 (19.Ne4 de4 20.Nd2 c5+=) 19...Nc3 20.Bc3 c6 (20...dc4 21.Qb8 Rb8 22.Ra7+=) 21.Qb8 Bb8 22.Rc1 Nf6 23.Bb2 dc4 24.Rc4 cb5 25.Rc8 Bc8 26.Bb5 Bd7 27.Bd7 Nd7 28.Ba3 f6 29.Kf1 Kf7 30.Ke2 Bc7 31.Kd3 b5 32.g4 Ba5 33.e4 Nb6 34.Nd2?? Bd2–+ 35.Kd2 Nc4 36.Kc3 Na3 37.Kb3 Nc4 38.Kb4 Nd2 39.e5 Nf3 40.d5 ed5 41.ef6 d4 42.fg7 Kg7 (43.Kb3 d3–+) 0–1. Holz auf der Heide – Kalavrouziotis, CiF, 1995.

8.Nf3 c5 9.bc6 bc6 10.Be2 Bd6 11.0–0 0–0 12.c4 (12.d4 Qa5 13.Nbd2 Ba6 14.c4 Qa2 15.Qb1 Qa4 16.Ne5 Ra8 17.Bc3=; 12.Nd4 e5 13.Nf5 Bc7 14.d4 e4 15.Ng3 Nb6 16.Bc3 Qe7 17.Qd2+=) 12...Ba6 13.cd5 (13.d4 Bc4 14.Bc4 dc4 15.Nbd2 Nb6 16.Qc2 Qd7 17.Rb1=) 13...Be2 14.Qe2 cd5 15.d3 (15.Bf6 Qf6 16.Nc3 Ne5 17.Ne5+=) 15...Qa5 (15...Qe7 16.Nc3 e5 17.Rb1+=) 16.Bc3 Qa4 17.Qd1 (17.Nd4 Qa6+=) 17...Qa6 18.h3 Rb8 19.Re1 Nc5 20.Bf6 gf6 21.d4 Nd3 22.Rf1 Nb2 23.Qc2 Nc4 24.Nbd2 Rb2 25.Qd3 Qa2 26.Nc4 dc4 (26...Qc4 27.Qd1=) 27.Qe4 c3 28.Qc6 Bb4 (28...c2 29.Ne1 Qb1 30.Nc2 Bh2 31.Kh2 Qf1 32.Na3 Qf2 33.Qa8 Kg7 34.Qe4–+) 29.Ne1 (better is 29.Qc7=) 29...c2–/+ 30.Nd3 (30.Nc2!? Rc2 31.Qf3–/+) 30...Rb1–+ 31.Nc1 (31.Nb4?? Rf1 32.Kh2 Qb2 33.Nc2 Rc1–+) 31...Qb2 32.Nd3 (32.Qa8 Kg7 33.Qb8–+) 32...Rf1 33.Kf1 0–1. Bustelo,Tabare (2095) – Gonzalez,Nahuel (2055), ch–URU, Montevideo URU, 2004.

8.Nf3 e5 9.Ne5+/– (9.Be5 A) 9...Be7 10.Bc3 (10.Bb2 0–0 11.Be2 Re8 12.0–0 Bd6 13.Nd4 Nc5 14.f4 Nce4+=) 10...0–0 11.Be2 Re8 12.0–0 c5 13.bc6 bc6 14.Nd4 Nb8+=; B) 9...Ne5 10.Ne5 Bd6 11.Nf3 0–0 12.Be2 Re8 13.0–0 Qe7 14.d4 Ne4+=) 9...Ne5 (9...Ne4 10.Nd7 (10.Nf3 Ndf6 11.Be2 Bd6 12.d3 Nc5 13.Be5 0–0 14.0–0 Re8+/–) 10...Bd7 11.Nc3 Qg5 12.b6 c6 13.Qf3 Qh4 14.g3 Qe7+/–) 10.Be5 Bd6 11.Bd4 c5 (11...0–0 12.Nc3 Be6 13.Qf3 Be7 14.Bd3 c5+/–) 12.bc6 bc6 13.c4 Bf5 (13...0–0 14.Nc3+= (14.c5 Bc7+=) 14...Ne4+=) 14.cd5 Nd5 (14...cd5+/–) 15.Bg7 Rg8 16.Bd4 Nb4 17.Na3 Qa8 18.Bb2 Nd3 (18...Bd3!? 19.Qb3 Qa6+/–) 19.Bd3+/– Bd3 20.Qb3 Qa6 21.Rg1 (better is 21.g3!?+/–) 21...Ke7= 22.f4 Rb8 23.Qc3 Rb2 (23...Rb2 24.Qb2 Ba3 25.Qe5 Kd7=). pvanr (2065) – carp_a_tex (2090), gameknot.com, 2010.

8.c4 Nb6

9.Qc2 dc4 10.Bc4 Nc4 11.Qc4 Be7 (11...b6 12.f4+=) 12.Be5 (12.Nf3 0–0 13.0–0 Nd7=) 12...Bd6 (12...Qd5!? 13.Qd5 Nd5+=) 13.Nf3 0–0 (13...b6 14.Nc3=) 14.0–0 (14.Nc3 b6=) 14...b6 15.Rc1 Bb7 16.Bd6 cd6 (worse is 16...Qd6 17.Qc7 Qc7 18.Rc7 Bf3 19.gf3+/–) 17.Nd4 Nd5 (17...Qd7 18.Nc6=) 18.Nc3+= Nc3 19.Rc3 (19.Qc3 Qd7+=) 19...Bd5 (19...Qg5 20.Nc6 Ra8 21.h3+=) 20.Qe2 (20.Qd3 f5+=) 20...e5 (20...Qf6!?=) 21.Nc6+= Qg5 (21...Qd7 22.e4 Ra8 23.h3 Bc6 24.Rc6+/–) 22.e4 (22.f4 Qf6 23.Qd3 Bc6 24.bc6 (24.Rc6?! ef4 25.ef4 Qf4+=) 24...ef4 25.c7 fe3 26.Qe3+/–) 22...Ra8+= 23.Rc1 (23.g3 Be6 24.h4 Qg4 25.Qg4 Bg4+/–) 23...Be6 24.Qd3 h5 (24...h6 25.Qd6 Ra2 26.Rb1=) 25.Qd6 Bh3 (25...Ra2 26.Qe5 Qe5 27.Ne5 Rd2 28.f4+=) 26.g3 Ra2?? Attacking the backward pawn on d2 27.Ne7+– Kh7 28.Qd8 Qf6 29.Qg8 Kh6 30.Qh8 Kg5 31.Nd5 Qh6 Black prepares the advance h4 32.Qd8 f6 33.Qb6 Rd2 34.Ne7 Re2?? 35.Qc6 h4 36.Qc4 Kh5 37.Qe2 Bg4 38.Qe3 g5 39.f3 Qg7 40.fg4 Kg4 (40...Kh6 41.Nf5 Kg6 42.Ng7 hg3 43.Nf5 gh2 44.Kh2 Kf7 45.Qa7 Ke6 46.Rc6#) 1–0. Karacsony,Zsolt (2070) – Leaua,Cristinel, Techirghiol op, 1999.

9.Qc2 dc4 10.Bd4 Nfd5 11.Bc4? (better is 11.Nf3+=) 11...Nb4–+ (11...Nc4?! 12.Qc4 Qg5 13.g3+=) 12.Qb3 Nc4 13.Qc4 e5! 14.Bc3 (14.Be5 Nd3 A double attack) 14...Be6 15.Qe4 f5 16.Qf3 Nd3 (16...Qd3 17.Na3 Nd5 18.e4 Qf3 A) 19.gf3?? Nc3 (19...Ba3?! 20.ed5 Bd5 21.Be5–+) 20.dc3 Ba3–+; B) 19.Nf3 Nc3 20.dc3 Ba3 21.ef5 Bf5 22.Ne5–+) 17.Kf1 Nc5 18.Qe2 e4 19.Na3 Qd5 20.Qd1 Qa2 21.Qa1 Qa1 22.Ba1 Nb3 23.Bb2 Nd2 24.Ke1 Bb4 25.Kd1 0–0 26.Nc2 Ba5 27.Kc1 Nb3 28.Kb1 Rd8 29.Nh3 Bc4 30.Na3 Bd3 31.Ka2 Nc5 32.Bd4 Ne6 33.Be5 Bb4 34.Rc1 Ra8 35.Bb2 Bb5 36.Kb3 Ba3 37.Ra1 Nc5 38.Kc2 Ba4 39.Kb1 Bb2 40.Kb2 b5 41.Kc3 Nd3 42.f3 c5 43.fe4 fe4 44.Ng5 Re8 45.Ne4 Re4 46.Kd3 Re8 47.e4 c4 48.Kd4 c3 49.Kc3 Re4 50.Kd3 Rg4 51.g3 Rb4 52.Rc1 h6 53.Ke3 Rb2 54.h4 Rb3 55.Kf4 Rd3 56.Rc8 Kh7 57.Ra8 Bd1 58.Rb8 Rf3 59.Ke5 Rg3 60.Rb5 Rg4 61.Rb1 Bc2 62.Rb2 Bg6 63.Rh2 Re4 64.Kd5 Re8 65.Kd4 Bf5 66.Rh1 h5 67.Rh2 Kh6 68.Rf2 Re4 69.Kd5 g6 70.Rh2 Re3 71.Rf2 Rh3 72.Rf4 Bg4 73.Ke5 Rh4 74.Kf6 Rh3 75.Rb4 Rf3 76.Ke5 Kg5 77.Rb8 h4 78.Rh8 h3 79.Ke4 Rf7 80.Ke3 Bh5 81.Rb8 h2 82.Rh8 Rf1 (82...Rf1 83.Rc8 h1Q 84.Rc5 Kg4 85.Rc4 Kg3 86.Ra4 Rd1 87.Rg4 Kg4 88.Ke2 Qf3#) 0–1. Saarenpaa,Toivo – Julkunen,Tapio, Ch Finland (team), 2006.

9.Qc2 dc4 10.Nf3 Nfd5 11.Bc4 Nb4 +=.

9.cd5 ed5 10.Qc2 Bd6 (10...Nbd7 11.Nf3=) 11.Be2 (11.Bd4 Nbd7=) 11...Qe7 12.Nf3 Bg4 13.0–0 Ne4 (13...0–0 14.Bd4=) 14.d3 (14.Bg7 Rg8 15.Bh6 Bh3–/+) 14...Ng5 (14...Nf6 15.Bd4=) 15.Ng5+= (15.Bg7 Nf3 16.Bf3 Bf3–+) 15...Qg5 16.Bg4 (16.f4 Qg6+=) 16...Qg4 17.h3 Qg6 18.Nd2 (18.Bd4 Nc8+=) 18...0–0= 19.Qb3 (19.Bd4!?=) 19...Ra8+= 20.Bd4 (20.Qc2 Ra5+=) 20...Ra3–/+ 21.Qb1 (21.Qd1 Qd3 22.Qg4 Bf8 23.Bb6 cb6–/+ (worse is 23...Qd2 24.Bc7 Qc3 25.Qd7+=)) 21...Qd3 22.Nf3 (22.Rd1 Nd7–/+) 22...Qb1–+ 23.Rb1 Nc4 24.Kf1 f6 25.Ke1 Ra2 26.Nh4 Na3 27.Rd1 (27.Rb3 Kf7–+) 27...Nc2 (better is 27...Bb4!? 28.Kf1–+) 28.Kf1 Nd4 (28...Kf7!? 29.Nf5 Bb4 30.Rb1–+) 29.Rd4–/+ c6 30.Nf5 Bc5 (30...Bf8 31.Rd1 Ra5 32.Nd4–/+) 31.Rd1 cb5 (31...g6 32.bc6 bc6–/+ (32...gf5 33.cb7 Rb2 34.Rd5–/+)) 32.Rd5+= b6 33.Nd4 (33.Rd7 b4 34.Rg7 Kf8–+) 33...b4–/+ 34.Nb3 Rc2 35.Ke1 (35.Rd2 Rc3 36.Nd4 Bd4 37.ed4 Kf7–/+) 35...Kf7 (35...Rc3 36.Nd2–/+) 36.Rd2 (36.Rd7 Kg6–/+) 36...Rc3–/+ 37.Rb2 Ke6 38.Ke2 Kd5 39.Nd2 f5 40.g3 Kc6 (40...h6 41.Nf3–/+) 41.h4 Kb5 42.Nb1 Rc1 43.Kd2 Rh1 44.Kc2 (44.Kd3 Rd1 45.Nd2 g6–/+) 44...Be7 (better is 44...Bd6 45.Nc3 Kc4–+) 45.Kd3 (45.Nc3 Kc4 46.Nb1 Rh2–+) 45...Rd1 (better is 45...Bf6 46.Rb3 Ka4–+) 46.Ke2–/+ Rc1 (46...Rd8 47.Na3 Ka4 48.Nc2–/+) 47.Kd2 Rc6 48.Kd3 (better is 48.Na3!? Ka4 49.Nc2–/+) 48...Bf6–+ 49.Rc2 Rd6 (49...Rc5 50.Kd2–+) 50.Ke2 b3 51.Rd2 Rd2 52.Kd2 Kb4 (52...g6 53.Kd3–+) 53.Kd3 h5 54.e4?? (better is 54.Kd2–+) 54...fe4 55.Ke4 b2 56.Kd3 Kb3 57.Kd2 b5 58.Kd3 b4 59.Kd2 (59.Nd2 Ka2 60.Kc2 b3 61.Kd3 b1Q 62.Nb1 Kb1–+) 59...Bc3 (better is 59...Ka2 60.Ke3 Kb1 61.Kd2–+) 60.Kd1 (60.Kd3 Ka2 61.Nc3 bc3 62.Kc3 b1Q–+) 60...Bd4 (better is 60...Ka2 61.Kc2 Be1 62.Kd3 Kb1 63.Ke3–+) 61.Nd2 Kc3 (better is 61...Ka2 62.Kc2 Bf2–+) 62.Nb1 Kd3 (62...Kd3 63.f4 Bf2–+) 0–1. Hanscombe,Richard (1755) – Carpenter,Raymond (1930), British Chess Championships: Week, 2015.

9.cd5 Nbd5 10.Nf3 =.

8.Nf3 Bb4

9.c3 Bd6 10.c4 0–0 11.Nc3 c6 12.Be2 dc4 13.bc6 bc6 14.Bc4 Nb6 (14...e5 15.Qc2=) 15.Be2 (15.Bd3 Nbd5=) 15...Nbd5 16.Qa4 (16.0–0 Re8=) 16...Bb7 (16...c5 17.0–0=) 17.0–0 (17.e4 Nc3 18.Bc3 Bf4=) 17...c5 (17...Qd7 18.Nd5 cd5 19.Qh4=) 18.Rb1 Nc3 (18...Qe7 19.Nb5 Ra8 20.Qc4=) 19.Bc3 Bd5 20.d3 Bf3 (20...Qe7 21.Qc2 e5 22.e4=) 21.Bf3+= (21.gf3?! Nd5 22.Ba1 Nb4=) 21...Bb8 22.Qc4 Qd6 23.g3 Nd5 24.Ba1 (24.Bb2 Nb4 25.d4 Ba7+/–) 24...Nb4 25.d4 Ba7 26.dc5 Bc5 27.Rd1 (27.Rc1 Qd2+=) 27...Qe7 28.Bc3 Nc2 (28...Re8!?+=) 29.Bg7!+/– Kg7 30.Qc2 Ba7 (30...Rc8 31.Be4+/–) 31.Qa4 (31.Qe4 Rd8+–) 31...Qf6 32.Kg2 Bc5 33.Rc1 Bb6 34.Rc4 Rd8? 35.Qb4 e5 36.Rc6 Qf5 37.Rb6 h5 38.h4 Rh8 39.Be4 (39...Qg4 40.Kh2+–; better is 39.Qe7!? Rc8+–) 1–0. Bennett,Hilton Petrie – Celis,Solomon B III (2200), Asia–chT Genting Highlands, 1998.

9.c4 0–0 10.Qb3 Bd6 11.d4 dc4 12.Bc4 =.

9.c4 0–0 10.Qb3 Qe7 11.Be2 b6 (11...Bd6 12.0–0=+) 12.0–0= Bb7 13.Nc3 (13.d4 Ra8 14.Bb2 Bd6=) 13...dc4 (13...Ra8 14.d4=) 14.Qc4 Bf3 (14...Qd6 15.d4=) 15.gf3 (15.Bf3 Ne5 16.Qf4 Bd6=) 15...Ne5 16.Qd4 Bd6 (16...Nfd7 17.f4 c5 18.Qe4=) 17.f4 Ng6 18.Qc4 Ra8 (18...Qd7 19.d3=) 19.d4 (19.Bf3 Ra3=) 19...Ra5 20.Bb2 Ba3 21.Ba3 Ra3 22.Bf3 Ra7 (22...Qd6 23.Rc1=) 23.Rc1 h6 24.Bg2 Qa3 25.Rd1 Ne7 26.Re1 Qb2= 27.Rb1 Qc2 28.Qb3 Qg6 29.Rc1 Nf5 30.Qc2 Ra5 31.h3 Ra7 32.Kh2 Qh5 33.Rb1 Ra3 34.Qc1 Ra5 35.Qf1 Nd6 36.Rb2 Qh4 37.Bf3 Nf5 38.Qc4 Ra7 39.Qe2 Ra1 40.Rd2 Ra7 41.Ra2 Ra2 42.Qa2 Ne8 43.Ne4 Qd8 44.Qd2 Ned6= 45.Nc3 Kh8 46.Bg2 Ne8 47.Qa2+= Ned6 48.Qa8 Qa8 49.Ba8 Kh7 50.Kg2 Kg6 51.Kf1 Kh5 52.d5 ed5 53.Bd5 ½–½. Nemec,Zdenek – Zednik,Martin, MCR EP II–1, 2000.

9.c4 0–0 10.Bc3 Bd6 =+.

9.c4 Nb6 10.cd5 Nbd5 11.Nc3 =+.

9.Be2 Bd6 =.

8.Nf3 Bd6

9.Bb2 e5 10.Be2 0–0 11.0–0 =+.

9.Bb2 e5 10.Be2 e4 11.Nd4= 0–0 (11...Nb6 12.0–0=) 12.Nf5 (12.f3 Nc5=) 12...Bb4 (12...Be5 13.Bc3=+) 13.0–0= Nc5 (13...Nb6 14.Ng3=) 14.Ng3 Bd7 (14...Re8 15.f3 ef3 16.Bf3=) 15.Bc3 (15.f3 ef3 16.Rf3 Nce4=) 15...Bc3 16.Nc3 c6 (16...Be6 17.d4 ed3 18.Bd3=) 17.f3 (17.bc6 bc6 18.d4 Ne6=) 17...ef3 18.Bf3 (< 18.gf3 Bh3 19.Re1 d4–/+) 18...Qe7 19.Qa1 Ng4 (19...Qd6 20.Qb2=) 20.Bg4 Bg4 21.Qa5 (better is 21.Qa7 Re8 22.Rb1=) 21...f6? (better is 21...Qd6!?=) 22.Qb4+/– Bc8 (22...h5!? 23.h3 h4 24.Qg4 hg3 25.Qg3 f5+/–) 23.Na4+– b6 24.bc6 Re8 25.Nb6 Be6 26.Nf5 Qf8 27.c7 Na6 28.Qf8 Kf8 29.Nd6 Nc7 30.Ne8 Ne8 31.Ra1 Nd6 32.Ra5 Ne4 33.d3 Nc3 34.Kf2 Ke7 35.Ra7 Kf8 36.Kf3 Nb5 37.Ra5 Nc7 38.c3 h5 39.Na8 Na8 40.Ra8 Kf7 41.Ra7 Kg6 42.e4 Bg4 43.Kf4 de4 44.Ke4 Be2 45.Ke3 Bg4 46.c4 Be6 47.Kd4 h4 48.h3 Bf7 49.Re7 f5 50.Ke5 f4 51.c5 f3 52.gf3 Be8 53.Kd5 Bb5 54.c6 Ba6 55.Re4 Kh5 56.Re5 Kh6 57.Re8 Kg6 58.c7 Kf7 59.Rd8 Bb7 60.Kc5 Ke6 61.Kb6 Bf3 62.c8Q Ke5 63.Rf8 Bg2 64.Kc5 Bh3 65.Qc7 Ke6 66.Qd6# 1–0. mtrc – Caissa, internet, 2002.

9.c4 Nb6 10.Qc2 dc4 11.Bc4 Nc4 12.Qc4 0–0 13.0–0 Nd7 14.d4 Nb6 15.Qc3 Bd7=+ 16.d5 Qf6 17.de6=+ fe6 18.Qf6 gf6 19.Nd4? e5–+ 20.Nf3 Bb5 21.Rc1 Nd5 22.Nc3 Nc3 23.Bc3 Ra8 24.Ra1 Ra1 25.Ba1 Kf7 26.Nh4 Bd3 27.g4 c5 28.f3 c4 29.Nf5 Bc5 30.Kf2 b5 31.Bc3 b4 32.Bd2 b3 33.Bc3 Bf5 34.gf5 Bb4!! (35.Bb4 b2–+) 0–1. pumpkin (2325) – wyckedknight, net–chess.com, 2009.

9.c4 c5 10.d3 0–0 11.Be2 Bb8 12.0–0 Qc7 (13.Qc2 e5 14.cd5 Nd5=) =. Grosse,Michael – Vorobjev,Albert (2050), IECG, 2000.

9.c4 e5 10.d4 e4 11.Ne5 0–0 12.c5 Be7 13.c6 Ne5 14.de5 Ng4 (14...Ne8!?=+) 15.cb7+= Be6 16.Qc2 Bb4 17.Bc3 Qe7 18.Qa4 Bc3 19.Nc3 Ne5 20.Qd4 Nd7 21.Nd5 Bd5 22.Qd5 Qb4 23.Qd2 Qb1 24.Qd1 Qb4 25.Qd2 Qb1 26.Qd1 Qb4 27.Qd2 ½–½. Pierred (2240) – Socrates (2430), Rated game, 5m + 0s, 2005.

9.c4 e5 10.cd5 Nd5 11.Bc4 =+.

9.c4 e5 10.cd5 Nd5 11.e4 =+.

9.c4 Qe7 10.Be2 e5 11.cd5 Nd5 12.Nc3 Nc3 13.Bc3 0–0 14.0–0 f5 (14...Rd8 15.d4=) 15.Bc4 Kh8 16.Qa1 (16.d4 e4 17.Nd2 Nb6=) 16...Re8 (16...e4 17.Nd4=+) 17.d3= e4 18.de4 fe4 19.Nd2 Nb6 20.Bb3 Bf5 (20...Qg5 21.h4 Qh6 22.Bd4=) 21.Qb2 Ba3 22.Qa1 Bc5 (22...Bb4 23.Nc4 Bc3 24.Qc3=) 23.Qb2 h5 (23...Rd8 24.Ra1=) 24.Nc4 Nd5 25.Ne5 Nc3 26.Nf7 Kh7 27.Qc3 Bb6 28.Rc1?? (better is 28.Qd2=) 28...Bg6–+ 29.Qc4 (29.Bd5–+) 29...Rf8 (30.Qe2 Bf7–+ (30...Rf7?! 31.Bf7 Bf7 32.Rd1–+)) 0–1. Scholz – Garcia, corr ICCF WT–M–103, 1978.

9.d4 Nb6 10.Bd3 =.

9.Be2 Nc5 10.0–0= 0–0 11.d4 Nfe4?? (11...Nce4!?=) 12.c4?? (12.dc5 Nc5 13.Nc3 Bd7+–) 12...c6?? (12...Nd7 13.Nc3+=) 13.Nbd2?? (13.dc5 Nc5 14.Bd4 cb5 15.cd5 b4+–) 13...cb5?? (13...Nd7 14.c5 Be7 15.Bb2+=) 14.cb5?? (14.dc5 Nc5 15.cd5 ed5+–) 14...Qc7?? 15.Qc1?? Nd2= 16.Qd2 Ne4+= 17.Qc1 Bd7 18.Qc7 Bc7 19.Rc1 Rc8+= 20.Ne5 f6–/+ 21.Nd7?? Bh2!–+ 22.Kh2 Rc1 23.f3 Ng5 24.Nc5 Ra1 25.Nb7 Ra2 26.Bd3 Nf3 27.Kg3 Nd2 28.Nc5 e5 29.b6 Rb2 30.b7 Nc4 31.Bf5? Nd6?? 32.Bc8? Kf7?? 33.Be6 Ke7–+ 34.Bd5 ed4 35.ed4 Rb5 36.Bc6+= Nf5 37.Kf4+/– Nd4?? 38.Bb5+– (38.Bb5 Kd6 39.b8Q Kc5 40.Bd7+–) 1–0. Gibson,E Diarmid – Leckie,Robert, Glasgow SCO, Commonwealth Ch, 2014.

9.c4 0–0

10.Qc2 b6 11.Bd3 dc4 12.Bc4 Bb7 13.Bb2 Ne4 (13...Qe7 14.Nc3+=) 14.d3 (14.h4 Qe7=) 14...Bb4+= 15.Ke2 Nd6 16.Bg7 Kg7 17.Qb2 Kh6 18.Qb4 Rg8 19.Nbd2 Rg2 20.Qc3 Nc5 21.Qd4 f6 22.Nb3 Bf3 23.Kf3 Rg5 24.Ke2 e5 25.Qh4 Kg7 26.Nc5 bc5 27.Qh3 f5 28.Qh4 h6 (worse is 28...Nc4 29.Qc4 (29.dc4?! h6 30.Rg1 e4 31.Rg5 hg5=) 29...e4 30.de4+/–) 29.Rg1 e4 30.f4 ef3 31.Kf3 Nb5 32.Rg3 (32.Bb5? Qd5 33.Kf2 Qa2 34.Kf3 Rg1 35.Qe7 Qf7 36.Qe5 Kh7–+) 32...Nd6 33.Bd5 Nf7 34.Bf7 Rg3 35.hg3?? (better is 35.Qg3 Kf7 36.Qe5 Qd3 37.Qc7 Kg6 38.Qc6 Kh5 39.Qc5 Qe4 40.Kg3 Qg4 41.Kf2=) 35...Qh4–+ 36.gh4 Kf7 37.Kf4 Kf6 38.h5?? (38.e4 fe4 39.Ke4–+) 38...c6 39.e4 (39.Kg3 Kg5 40.Kf3–+) 39...fe4 40.de4 c4 41.e5 Ke6 42.Ke4 c5 (42...c5 43.Kf4 Kd5–+) 0–1. Fua,Ni (2015) – Toledo,Ruben Javier, ICCF–FM72, 2010. (=1.Nf3 d5 2.b4 e6 3.Bb2 Nf6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 Bd6 8.e3 Nbd7 9.c4 0–0)

10.Qc2 b6 11.Be2 dc4 12.Qc4 (12.Bc4 Bb7 13.Be2 Qe7 14.0–0 e5 15.d4 e4 16.Nfd2 Rc8 17.Nc3=; 12.0–0 Bb7 13.Qc4 Bd5 14.Qc2 Qe7 15.Nc3 c5 16.Rc1 Bf3 17.Bf3=) 12...Bb7 13.0–0 Qe7 (13...Qa8 14.Bc3 Ne4 15.Bb2 Bd5 16.Qc2 c6 17.d3=) 14.Nc3 Ra8 (14...Rc8 15.Rc1 c6 16.d4 e5 17.Bb2=) 15.Bb2 (15.Rc1 e5 16.d3 Rc8 17.Nh4=) 15...Qe8 (15...e5 16.d3 Nc5 17.Rd1=) 16.Ra1 (16.d4 Nd5 17.Rc1=) 16...Ra1 17.Ba1 e5 18.d3 Qa8 19.Bb2 h6 20.e4 Nf8 21.g3 Ng6 22.Nd2 Bc8 23.Qa4 Qa4 24.Na4 Bb4 ½–½. Schmidt,Karl Heinz (2125) – Santos Etxepare,Agustin (2280), corr EU/WS/M/019 ICCF, 2010.

10.Nc3 b6 11.Be2 dc4 12.Bc4 Bb7 13.0–0 Ng4 14.g3 Nde5 15.Be2 Bf3 16.Bf3 Qg5 17.Ne4 Qh5 18.h4 Nf3 19.Qf3 Rd8 20.Nd6 cd6 21.Rc1 e5 22.Rc6 Qg6 23.Bc3 Qb1 24.Kg2 Qg6 25.Rb6 h5 26.Rc6 Qd3 27.b6 d5?? 28.b7+– e4 29.Qf5 Ne3 30.fe3 Qe2 31.Kh3 Qd1 32.Qf2 Qh1 33.Qh2 Qf1 34.Qg2 Qb5 35.Rc8 Qd7 36.Kh2 Rc8 37.bc8R Qc8 38.Qh3 Qh3 39.Kh3 f5 40.Bd4 g6 41.Kg2 Kf7 42.Kf2 Ke6 43.Ke2 Kf7 44.Kd1 Ke7 45.Kc2 Ke6 46.d3 Kd7 47.de4 de4 48.Kc3 Ke6 49.Kc4 Kd6 50.Bg7 Ke6 51.Kd4 Kf7 52.Bh6 Ke6 53.Bg5 Kd6 54.Bf4 Ke6 55.Kc5 Ke7 56.Kd5 Kf7 57.Ke5 Ke7 58.Bg5 Kf7 59.Bf6 Kg8 60.Ke6 Kf8 61.Be5 Kg8 62.Kf6 Kh7 63.Kg5 Kg8 64.Kg6 Kf8 65.Kf5 Ke7 66.Ke4 Ke6 67.Kf4 Kf7 68.Kg5 Ke6 69.Bf4 Ke7 70.Kh5 Kf6 71.Kg4 Ke6 72.Kg5 Kf7 73.h5 Ke8 74.Kg6 Ke7 75.Kg7 Kd7 76.h6 Kc6 77.h7 Kb5 78.Kf6 Kc4 79.g4 Kc3 80.g5 Kd3 81.g6 Ke2 82.g7 Kd2 83.g8Q Ke2 84.h8Q Kd2 85.Qb3 Ke1 86.Qh2 Kf1 87.Qb1# 1–0. Bonetti,Shane – Gnuchess Mac 4, 2000.

10.Nc3 Nb6 11.d3 Bb4 12.Qb3 Qe7 13.Be2 Bd7 (13...dc4 14.dc4 Bd6 15.0–0=) 14.0–0 Ra8 (14...Bd6 15.Na4=) 15.Bb2 (15.Ne5=) 15...Bc3 (15...Bd6!?=) 16.Bc3+= Qa3 17.Qa3 (17.Qc2 Qa4 18.Qb2 Qa2+/–) 17...Ra3 18.Rb1?? (18.Rc1 dc4 19.dc4 c5+=) 18...Ra2?? (better is 18...Rc3 19.Ne5 Bc8–+) 19.Kf1+= Na4 20.Be5 c5 21.Ra1+/– Ra1 22.Ba1 Ne8 23.Ne5 Bc8 24.d4 f6 25.Nf3 cd4= 26.ed4 dc4–/+ 27.Bc4 Nb6 28.Be2 Nd6 29.Bc3 Bd7 30.Ba5 Nbc4 31.Bb4 Bb5 32.Ke1 Bc6 33.Nd2 Nd2 34.Bd6 Ne4 35.Bb4=+ Kf7?? 36.f3+/– Ng5 37.h4 Nf3 38.gf3 g5 39.hg5 fg5 40.Kf2 h6 41.Kg3 Bd7 42.f4+– gf4 43.Kf4 Bc6 44.Bh5 Kg7 45.Ke5 Bd5 46.Kd6 Bc4 47.Ke7 b5 48.Bd6 Bd5 49.Be5 Kh7 50.Kf7 Be4 51.Ke6 b4 52.d5 b3 53.d6 (53...Bc6 54.d7 Bd7 55.Kd7+–) 1–0. Zahn,R – Ciaxz,R, VEM, 2000.

10.Nc3 Nb6 11.d3 Qe7 12.Be2 =+.

10.Nc3 Nb6 11.cd5 ed5 12.Bd3 (12.Be2 Be6=+) 12...Bg4 13.h3 Bh5 14.Na4 (14.0–0 Re8=+) 14...Nbd7 15.g4 (15.0–0 Re8=+) 15...Bg6 16.Bg6 fg6 17.0–0 (17.d3 c5–/+) 17...Qe7 18.Qb3 (18.Bd4 c5 19.bc6 bc6=+) 18...c6 19.bc6 bc6 20.Qd1 h5 (20...Ne4 21.d3 Rf3 22.Qf3–/+) 21.Nd4=+ c5 22.Nb5 Bb8 (22...hg4 23.hg4 Bb8 24.g5=+) 23.Bf6 (23.f3 c4=+) 23...Qf6 24.f4 hg4 25.Qg4+= Qc6 26.Qe2 Rf5 27.Nac3 Nf6 28.Rb1 Qc8 29.Qg2 Rh5 30.Ra1+= Qc6 31.Rb1 Qe6 32.Ne2 Qh3 33.Qh3 Rh3 34.Nbd4 Bd6 35.Kg2 Rh6 36.Nf3 Rh5 37.Rb6 Ne8 38.Ng3 Rh8= 39.Rb7 Nf6 40.Ng5+= Rh4 41.Ne6 Ne8 42.Ne2 Rh6 43.Nc3 g5 44.Ng5 Nf6 45.Nb5 Bf8+= 46.Nc7 Ne4 47.Ne4 de4+= 48.Nb5 Re6 49.Kg3 g6 50.Kg4 c4 51.Rc7+/– Bb4 52.Nc3 Bc3 53.dc3 Rd6 54.Kg5 Rd5 55.Kg6 Rd6 56.Kf5 Rd3 57.Ke4 Rc3 58.f5 Kf8 59.f6 Ke8 60.Re7 Kf8 61.Kf5 Rb3 62.e4 Rf3 63.Kg6 Rg3 64.Kh5 Rh3 65.Kg4 Re3 66.e5 Re1 67.Kf5 c3?? 68.Rc7 Kg8 69.Rc3 1–0. cgits (2635) – rcastaneda (2760), net–chess.com, 2005.

10.Nc3 Nb6 11.cd5 Nbd5 12.Be2 =+.

10.Nc3 dc4 11.Bc4 Nb6 12.Bb3 =+.

10.Nc3 dc4 11.Bc4 e5 12.Qc2 Nc5 13.Ng5 h6 14.Nge4 Nfe4 15.Ne4 Bf5 16.d3 Ne4 17.de4 Bg4 18.0–0 Qg5 19.Kh1 Kh8 20.Bd5 b6 21.Qd2 f5 22.f4 (better is 22.h3!? Bh5 23.ef5=) 22...fe4 23.Be4 (23.fg5?? Rf1) 23...ef4 24.ef4 Rf4 25.Rf4 Qf4 26.Qf4 Bf4 27.g3 Bd6 28.Kg2 Bd7 29.Bd3 c6 30.bc6 Bc6 31.Kf2 Be7 32.Bc3 Bf6 33.Bb4 Bd4 34.Ke2 Bg1 35.h4 Bc5 36.Bc5 bc5 37.Bg6 Bd5 38.Ke3 Kg8 39.Kf4 Bb3 40.Ke5 Kf8 41.g4 Ke7 42.g5 Bf7 43.Bf5 h5 44.Bc2 Be6 (44...Kd7 45.Ba4 Kc7 46.Bc2+=) 45.Bd1 (45.Bg6!?=) 45...Bg4+= 46.Bc2 Be2 47.Bg6 c4 48.Kf4 Bd1 0–1. Thesing,Michael (1915) – Kemper,Georg (1935), Muensterland Verbandsklasse–B, 2006.

10.Nc3 Re8 11.Qc2 dc4 12.Bc4 Nb6 13.Bd3 =+.

10.Nc3 Re8 11.Qc2 e5 12.cd5= Nb6 13.e4 Nh5 14.Nd1 Nf4 (14...Bg4 15.Be2=) 15.Ne3+= Qf6 (15...Qe7 16.g3+=) 16.Bb2 (16.d4 ed4 17.Bd4 Qg6+=) 16...Bd7 17.Qb3 (17.h3 Qg6+=) 17...Ra8 (17...Bc5 18.Bc3 Bd4 19.Qb4= (< 19.Nd4 ed4 20.Bb2 Re4–/+)) 18.d4+= ed4 19.Bd4 (< 19.Nd4 Na4–/+) 19...Qe7 20.Nd2 Bb4 (20...Bc5 21.Bc5 Ra1 22.Nd1 Qc5 23.Qb2+=) 21.Bc3 (21.e5 Bc5 22.Qc3 Bb4 23.Qc7 Nfd5=+) 21...Bc5= 22.Bb2 Na4 23.Bc1 Bb4 24.Qc4 (better is 24.f3!?=+) 24...Nc5–+ 25.Nc2 Ra4 26.Nb4 Rb4! 27.Qc3 (27.Qb4 Ncd3) 27...Ne4 28.d6 Nd6 (28...Nc3?! 29.de7 Nb5 30.Nb3 Re4 31.Kd1–+) 29.Qe3 0–1. b4_player – opponent, gamecolony.com, 2008.

10.Nc3 Re8 11.Qc2 h6 12.cd5 ed5 13.Be2 Nc5 14.0–0 Qe7 (14...Bg4 15.h3 Bh5 16.Bb2=) 15.Bb2= Bg4 16.Ra1 Nce4 17.Ra7 Bc5 18.Ra2 Nc3 19.Bc3 Ne4 20.Ba1 Bb6 21.Qb2 f6 22.Qb3 Qd6 (22...Qc5 23.h3 Qc1 24.Kh2=) 23.Bd4 (23.d3 Nc5 24.Qb1 Qf8=) 23...Rd8 (23...c5 24.bc6 Bd4 25.cb7+–) 24.Qc2 (24.d3 Nc5 25.Qa3 Bd7=) 24...Rc8 (24...h5 25.h3 Bf3 26.Bf3 Bd4 27.ed4=) 25.d3+= Bf3 26.Bf3 Bd4 (26...Ng5!? 27.Bg4 Rf8 28.Bb6 Qb6+=) 27.de4+/– Qb4 28.g3 Be5 29.ed5 Qb5 30.Qf5 Rd8 31.Be4 Kf8 32.Qh7 Qd7 33.Ra7 f5 34.Bf5 (worse is 34.Qf5 Qf5 35.Bf5 Rd5 36.Rb7 Rd2+=) 34...Qd5 35.Be4 Qf7 36.Ra5 Bf6 37.Bb7 Rd1 38.Kg2 Qc4 39.Ra8 Ke7 40.Kh3 (40.Qg6 Qf1 41.Kf3 Qh1 42.Kf4 Qb7 43.Qe8 Kd6 44.Rd8 Bd8 45.Qd8 Kc5 46.Qd1 Qb2+/–) 40...Rg1+= 41.Qf5 Qf1 42.Kg4 Qe2 43.Bf3 Qc4 44.e4 Ra1 45.Rc8 Ra2 46.Bd1 g6 47.Qg6 Rf2 48.Re8 Kd7 49.Ba4 Kd6 50.Rd8 Kc5 51.Rd5 Kb4 52.Bb5 Qb3 ½–½. Cottarelli,Franco (2070) – Santos Etxepare,Agustin (1965), corr WS/M/185 ICCF, 2008.

10.Nc3 Re8 11.d4 Bb4 =.

10.cd5 Nd5 11.Be2 e5 12.Nc3 Nc3 13.Bc3 e4 14.Nd4 Qg5 15.0–0 Nf6 16.f3 Qh6 17.f4 g5 18.Qe1 gf4 19.ef4 Nd5 (19...Bf4 20.g3 Bd6 21.Nf5 Bc5 22.Kg2+/–) 20.Qg3 Qg6 21.Bb2 Rd8 22.Nb3 Qg3 23.hg3 Be6 24.f5 Bd7 25.g4 c6 (25...Ra8 26.Ra1 Ra1 27.Ba1+=) 26.Na5 ½–½. Kural,A Serhat (2000) – Sanchez Ortega,Ruben, Jubilee, 2007.

10.Be2 c6 11.d4 dc4 12.bc6 Nb6 13.Nbd2 =.

10.Be2 c6 11.d4 Ne4 12.Nbd2 (12.c5 Qa5 13.Nbd2 Bc7=) 12...f5 (12...Nd2 13.Qd2 dc4 14.Bc4 cb5 15.Bb5=) 13.Qb3 (13.c5 Be7+=) 13...Qa5= 14.Bb2 Bb4 15.Qc2 (15.Bc1 Ndf6=) 15...cb5=+ 16.cb5 Ndf6 17.Bc1 Bd7 18.0–0 Rc8 19.Qd3 Nc3 20.Nb3 Qa2 (20...Bb5?! 21.Qb5 Qb5 22.Bb5 Nb5 23.Ng5–/+; 20...Ne2?! 21.Qe2 Bb5 22.Qb2–+) 21.Bd1 (21.Kh1 Bb5 22.Qd2 Qd2 23.Bd2 Be2–+ (23...Ne2?! 24.Bb4 Ng3 25.hg3 Bf1 26.Kg1–+)) 21...Bb5 (21...Nb5?! 22.h3–/+) 22.Qd2 Ne2 (23.Be2 Bd2 24.Bb5 Qb3 25.Bd2 Qb5–+) 0–1. Paltrinieri – Rudbeck,Joergen, corr ICCF TT–4–90 SF, 1995.

10.Nc3 c5

11.Be2 dc4 12.0–0 Nb6 13.Nb1 (13.Na4 Nfd7 (13...Nfd5 14.e4 Na4 15.Qa4 Nb6 16.Qc2 Qd7 17.Bc4 Nc4 18.Qc4 b6=; 13...Na4 14.Qa4 b6 15.Ne5 Qc7 16.f4 Bb7 17.Nc4 Ra8 18.Qc2 Nd7=) 14.Nb6 Nb6 15.Qc2 Bd7 16.d3 cd3 17.Bd3 h6 18.Be5 Be5=; 13.Qc2 e5 (13...Bd7 14.Rd1 Qc7 15.Na4 Bb5 16.Nb6 Qb6 17.Bf6 gf6 18.Qb2 Qc6–/+; 13...Re8 14.Na4 Na4 15.Qa4 e5 16.Bc4 Nd7 17.Qb3 Qf6 18.Qc2 Qh6=) 14.Ne4 Bf5 15.d3 cd3 16.Bd3 Be4 17.Be4 Ne4 18.Qe4 Qe7–/+) 13...Qe7 (13...Re8 14.Na3 e5 15.Nc4 Nc4 16.Bc4 Be6 17.d3 Bc4 18.dc4 Qc7=; 13...Bd7 14.Na3 Nfd5 15.Qb1 Nb4 16.Be5 Be5 17.Ne5 Qc7 18.Nec4 Ra8=) 14.Be5 Rd8 15.Qc2 Nfd5 16.Bd6 (16.Bc4 Nb4 17.Qc3 Nc4 18.Qc4 Be5+=) 16...Rd6 (16...Qd6 17.Na3 Nb4 18.Qc3 Qd7+=) 17.Bc4 Nb4 18.Qe4 (18.Qc3 Rd8=) 18...Nc4 (18...Rd8=) 19.Qc4 Rd8 20.Nc3 e5 21.Qe4 (21.d4 cd4 22.ed4 Be6=) 21...Nd3+= 22.Ra1 (22.Nd5!? Qe6 23.Qd3 Rd5 24.Qe4=) 22...f5–/+ 23.Nd5 fe4 24.Ne7 Kf7 25.Nc8 ef3 26.Nb6 Rd6 27.Nc4 Rg6 28.g3 Ke6 29.Ra4 Kd5 30.e4 Kd4?? (better is 30...Ke4 31.Ra7 Kd4–/+) 31.Na5= Nb4 32.Nc6 (worse is 32.Nb7 Rb6 33.Ra7 Nc2–/+) 32...Kc4 (32...bc6? 33.b6 Rd6 34.b7 Ke4 35.b8Q Rd2 36.Rb4 cb4 37.Qb4 Rd4 38.Qb3+–) 33.Ne5 Kb5 34.Ra3 Re6 35.Nf7 Re7 36.Rf3 Kc6 37.Ng5 b5 38.Rf7 (38.Kf1 c4=) 38...Rf7+= 39.Nf7 Nd3 40.Kf1 b4 41.Ke2 c4 42.f3 Kd7 43.Kd1 Ke7 44.Ng5 Nf2 45.Kc2 b3 46.Kb1 h6 47.Nh7 Nd3 48.f4 Kf7 49.e5 Nc5 50.f5 Kg8 51.e6 Ne4 (51...Kh7?? 52.e7 Ne4 53.e8Q+–) 0–1. marekt (2070) – glovio (2150), gameknot.com, 2014.

11.Be2 dc4 12.0–0 Ng4 A) 13.Qc2 Bc7 (13...Bb8 14.Ne4 f5 15.Ng3 Nb6 16.Bc4 Nc4 17.Qc4 Qd5 18.Rc1 Qc4=; 13...Qc7 14.h3 Nh2 15.Ng5 Nf6 16.Rc1 h6 17.Nge4 Ne4 18.Ne4 Be7+– 2.25) 14.d3 cd3 15.Bd3 f5 16.Rd1 Qe7 17.Bb2 b6 18.h3 Nge5+=; B) 13.h3 Ngf6 (13...Nge5 14.Ne5 Be5 15.Bc4 Nb6 16.Be2 Bc7 17.Qc2 f5 18.f4 Rf7=; 13...Nh6 14.Bc4 Nb6 15.d3 Nc4 16.dc4 Qb6 17.Ne4 Be7 18.Qe2 f6=) 14.Bc4 Nb6 15.d3 Qe7 16.Qc2 e5 17.Rd1 Rd8 18.Bb3 Be6=.

11.bc6 bc6

12.cd5 cd5 13.Nb5 Bb4 14.Bc3 Bc3 15.Nc3 Qa5 16.Qa4 Qa4 ½–½. jackhammer3000 (1890) – drpat23 (1905), gameknot.com, 2015.

12.cd5 cd5 13.Nb5 Qb6 14.Nd6 (14.Bf6 Nf6 (14...gf6 15.Nd6 Qd6 16.d4 e5 17.Nd2 Ba6 18.Ba6 Qa6 19.h3 Rb8=) 15.Nd6 Qd6 16.Qa1 Bb7 17.Be2 Ra8 18.Qd4 Ba6 19.d3 Nd7+=) 14...Qd6 15.Be2 (15.Bf6 Nf6 16.d4 Ba6 17.Bd3 Bd3 18.Qd3 Qb4 19.Qd2 Qb1+=) 15...Ba6 16.Bf6 (16.d3 Rc8 17.0–0 e5 18.Bb2 Rb8 19.Bc3 e4=) 16...Nf6 17.Qa1 (17.0–0 Ra8 18.Qa4 Nd7 19.Ba6 Ra6+=) 17...Ra8 (17...Be2 18.Ke2 Re8 19.Rc1 Qf8+=) 18.0–0 Qc6 (18...Ne4 19.d3 Rc8=) 19.Ba6 (19.Ne5 Qb7=) 19...Qa6 20.Qa6 Ra6 21.Rc1 g6 22.h3 Ra3 23.Rc2 Ne4 24.Kf1 Kg7 25.g4 Kf6 26.h4 h6 27.d4 g5 28.hg5 ½–½. forsetinn (2210) – glovio (2125), gameknot.com, 2014.

12.cd5 cd5 13.Nb5 Bb8 A) 14.Nbd4 Bb7 (14...Bd6 15.Nb5 Bb8 16.Be2 e5 17.0–0 Re8 18.Bc3 Re6 19.Ng5 Ra6=; 14...Qb6 15.Qb3 Qd6 16.Qb5 Qc7 17.Qc6 Qa7 18.Bb2 Bb7 19.Qb5 Bd6+=) 15.Bb5 e5 16.Nf5 Qb6 17.Qb1 Ba6 18.Bd3 Bd3 19.Qb6 Nb6–+; B) 14.Be2 e5 (14...Re8 15.0–0 e5 16.Bc3 Re6 17.d4 e4 18.Ng5 Rc6 19.Qd2 Nb6+=; 14...Qe7 15.Bb2 Re8 16.Ba3 Qd8 17.0–0 e5 18.d4 e4 19.Nd2 Ba6=) 15.0–0 Re8 16.Bc3 Re6 17.d4 e4 18.Ng5 Rc6 19.Qd2 Nb6+=.

12.cd5 cd5 13.Be2 Qa5 14.Qa4 Qa4 15.Na4 Bb7 16.0–0 Ra8 17.Nc3 Ba6 18.Ba6 Ra6 19.Rb1 Ra8 20.Kf1 Be7 21.Ke2 g6 22.Nd4 Ra6 23.f4 h5 24.Bb2 Rb6 25.d3 Bc5 26.Na4 Rb7 27.Rc1 (worse is 27.Nc5 Nc5 28.Kd2 Ng4–/+) 27...Bd6 28.Rc6 Bf8 29.Ra6 Kg7 30.Nc6 Nc5 31.Rb6 Rc7 32.Nc5 Bc5 33.Ra6 Rb7 34.Be5 Bb6 35.g3 d4? (35...Bc5 36.h3 Be7 37.Ne7 Re7 38.g4+–) 36.h3 de3+/– 37.Na5 Ba5 38.Ra5 Rb4 39.Kf3 e2? 40.Ke2 Rb7 41.g4 hg4 42.hg4 Rb6 43.g5 (43.g5 Kf8 44.Bf6+–) 1–0. Degterev,Pavel (2175) – Cuomo,Salvatore (1835), IECG, 2008.

12.cd5 ed5 13.Be2 Nc5 14.0–0 Bf5 15.Nd4 Bd7 16.Qc2 Qc7 17.h3 Rb8 18.Rb1 Rb1 19.Qb1 h6 20.Nf3 Qa5 21.Bb2 Nce4 22.Qc2 Ng5 23.Ng5 hg5 24.Qa4 Qd8 25.d4 Qb8 26.Ba3 c5 ½–½. Yarmolyuk,Yury (2130) – Ould Ahmed,Samy (2070), RH–2007–0–00101, 2008.

12.Be2 Qa5 13.cd5 cd5 14.Qa4 Qa4 15.Na4 Bb7 16.0–0 Rb8 17.Rb1 (17.Rc1 A) 17...Ra8 18.Nc3 (18.Bb5 e5 19.d4 e4 20.Ne5 Rc8 21.Rb1 Nb8 22.Nc3 Nc6 23.Bf1=; 18.Bf6 Nf6 19.Nc3 Ne4 20.Nb5 Bb4 21.d3 Ra2 22.de4 Re2 23.ed5=) 18...Ne4 19.Nb5 Bb4 20.Bd4 Ra2 21.Rc7 Ndc5 22.Bf1 Ba6 23.d3+=; B) 17...e5 18.Bb2 (18.Nc3 e4 19.Nd4 Be5 20.Nc2 Rc8 21.f4 Bd6 22.g4 Nc5 23.Nd4=; 18.d4 e4 19.Ne5 Rc8 20.Rc8 Bc8 21.Nd7 Nd7 22.Bb5 Kf8 23.Bc6=) 18...e4 19.Nd4 Ra8 20.Bb5 Rc8 21.Rc8 Bc8 22.d3 h5 23.f3=) 17...Bc6 (17...e5 18.Nc3 (18.d4 e4 19.Ne5 Ba6 20.Rb8 Nb8 21.Bd1 Nbd7 22.Bb3 Bb7 23.Nd7=; 18.d3 Kf8 19.Nb6 Ke7 20.d4 e4 21.Nd7 Nd7 22.Ne5 f6 23.Nd7+=) 18...Kf8 19.Nb5 Ba6 20.d4 e4 21.Ne5 Bb5 22.Rb5 Ra8 23.Bb2=) 18.Rb8 (18.Nc3 Rb1 19.Nb1 e5 20.d4 e4 21.Ne5 Ba4 22.Bb2 Bc2 23.Na3=; 18.Nb2 e5 19.Rc1 Bb7 20.d4 e4 21.Nh4 g6 22.Na4 Rc8 23.Rc8+=) 18...Nb8 (18...Bb8 19.Bf6 Nf6 20.Nc5 Bd6 21.d4 Ne4 22.Ne4 de4 23.Ne5=) 19.Nc3 (19.Nb6 Nbd7 20.Nd4 Bb7 21.Nd7 Nd7 22.f4 Nb6 23.Kf2=) 19...Ne4 (19...e5 20.Nb5 Bb5 21.Bb5 Nbd7 22.d4 e4 23.Ne5=) 20.Ne4 (20.d4 Nc3 21.Bc3 Bb7 22.Ne5 f6 23.Nd3=) 20...de4 21.Nd4 (21.Ne5 Bd5 22.d4 f6 23.Nc4=) 21...Bd5 22.d3 ed3 (22...Bc5 23.de4=) 23.Bd3 Nd7 24.e4 Bb7 25.Bb5 Nb6 26.f3 e5 27.Nc6 f6 28.Kf2 Bc5 29.Ke2 Bc8 30.Bc3 Bd7 31.Ba5 g6 32.Kd3 Kg7 33.h3 h5 34.Na7 Be6 35.Bd2 Kf8 36.Nc6 Bd7 37.Ba5 ½–½. forsetinn (2170) – re074 (1985), gameknot.com, 2013.

10.d4 Bb4?!

11.Bc3 Bc3 12.Nc3 dc4 13.Bc4 Nb6 14.Bd3 h6 15.0–0 Nbd5 16.Nd5 ed5 17.Qc2 Qd6 18.Rc1 Ne8 19.Qa4 Qb6 20.Nd2 (20.Qb4 g6+/–) 20...Nd6 21.Rc5 Be6 22.Nb1 Rc8 23.Nc3 c6 24.f3 (24.h3 Nb5 25.Bb5 cb5 26.Rc8 Bc8+=) 24...g6 (24...Qd8 25.bc6 b6 26.Rd5 Bd5 27.Nd5+/–) 25.Kf2 (25.bc6 bc6 26.Ba6 Rc7+=) 25...Kg7 26.Qc2 Ra8 27.bc6 bc6 28.Ne2 Bd7 29.Nf4 Ra1 30.Bg6 Bf5?? (30...fg6 31.Qg6 Double attack) 31.Bf5+– Nf5 (31...Qb4 32.Kg3 Qe1 33.Kh3 Qe3 34.Nh5 Kf8 35.Rc6+–) 32.Qf5 Qb4 (32...Ra2 33.Kg3 Qc7+–) 33.Nh5 Kf8 (33...Kg8 34.Qg4 Kf8 35.Qc8 Ke7 36.Qc7 Ke8 37.Qc6 Ke7 38.Qc7 Ke8 39.Qe5 Kd8 40.Qd6 Ke8 41.Nf6) 34.Qc8 Ke7 35.Qc7 Ke6 (35...Ke8 36.Qc6 Ke7 37.Qc7 Ke8 38.Qe5 Kd8 39.Qd6 Ke8 40.Nf6) 36.Rc6 (36.Nf4 Kf6 37.Qe5) 36...Kf5 (36...Qd6 37.Qd6 Kf5 38.Qd5) 37.Qf4 1–0. Sieber,Martin – Bochenek,Andrzej, Orlova op, 2005.

11.Bc3 Qe7 12.Qb3+= Bc3 13.Nc3 dc4 14.Bc4 (14.Qc4 Qd6+=) 14...b6 (14...e5 15.0–0=) 15.0–0+= Bb7 16.Ra1 (16.Be2 Ra8+=) 16...Ra8 (16...Bf3 17.gf3 e5 18.Ne2=) 17.Ra8+= Ba8 18.Qa4 (18.Nd2 e5+=) 18...Qd8 (18...Bf3 19.gf3 Qd8 20.f4+=) 19.Nd2 (19.Be2 Ne4 20.Qc2 Ndf6+=) 19...Qc8 20.f3 (20.e4 c5 21.bc6 Bc6+=) 20...c6 21.e4 e5 (better is 21...c5=) 22.d5 (better is 22.Ne2!?+=) 22...cd5–/+ 23.ed5 Nd5 24.Kf1? (24.Bd5 Qc5) 24...Nc3–+ 25.Qb3 Nb5 26.Qb5 Qc6 27.Qb3 Qf6 28.Bd5 Nc5 29.Qb5–/+ Qd8 30.Ba8 Qa8 31.Qb6 Qa6 32.Qa6 Na6 33.Ke2 Nc5 34.Ke3 f5 35.Nc4 Nd7 36.g4 fg4 37.fg4 Kf7 38.Nd6 Ke6 39.Ne8 g6 40.g5 Kf5–+ 41.h4 Nb6 42.Nf6 h6–+ 43.Ne4 hg5 44.Ng5 Nc4 45.Kf3 Nd6 46.Nh3 Ne4 47.Ke3 Nf6 48.Ng5 e4 49.Nh3 Ng4 50.Ke2 Nh6 51.Kf2 Ng4?? 52.Kg3?? Nf6–+ 53.Ng5 Ke5 54.Nh3 Kf5?? 55.Ng5 Nh5 56.Kf2 Kf4 57.Ne6 Ke5 58.Ng5 Nf4 59.Kg3 e3 60.Nf7 Ke4 61.Ng5 Kf5 62.Nf7 e2 63.Kf2 Ke4 64.Ng5 Kd3 65.Nf3 Nh3 66.Kg3? Ke3 67.Ne1 Nf4 68.Nf3 Nd3 69.Kg4 Kf2 (70.Nd4 e1Q–+) 0–1. Roczniak,Jan – Przewoznik,E, Poland (year?).

11.Bc3 Be7 12.c5 =.

11.Nbd2?! Ne4?!

12.Bd3 Nb6 13.0–0 Nd2 14.Nd2 Bd2 15.c5 Nc4 16.Bc4 Be3 17.fe3.

12.Bd3 Nb6 13.Qb3 Bd2 14.Nd2 Nd2 15.Kd2 Qg5 16.g3 dc4 17.Bc4.

12.Bd3 Nb6 13.c5 Nc4 14.Bc4 dc4 15.0–0 Nd2 16.Nd2 Bd7 17.Nc4.

12.Bd3 Nb6 13.c5 Nc4 14.Bc4 Nd2 15.Nd2 dc4 16.0–0 Bd7 17.Nc4 Bb5 18.Qb3 Qd5 19.Qb4 Qc4 20.Qc4 Bc4 21.Rb1 Ra8 22.Bc3 Ra7 23.Rb4 Bd5 24.Rb5 g5 25.Ra5 Ra6 26.Ra6 ba6 27.f3 f5 28.Kf2 Kf7 29.Ba5 c6 30.Bc7 ½–½. Bendig,Frank (2375) – Kupec,Jan (1995), CiF–12.Superturnier, 2010.

12.Bd3 Nd2 13.Nd2 dc4 14.Bc4 Nb6 15.Bd3 Bd7 16.0–0 f5 17.Nf3.

12.Be2 dc4 13.0–0 Nd2 14.Nd2 Bd2 15.Qd2 Nb6 16.Qc2 Qd5 17.Rb1.

12.Be2 c6 13.0–0 cb5 14.cb5 Nd2 15.Nd2 Nf6 16.Nf3 Ne4 17.Qc2 Bd7 18.Ne5 Be8 19.Rb1 Be7 20.f3 Nd6 The isolani on b5 becomes a target 21.Bd3 Kh8 22.Bc3 (worse is 22.Bh7 Nb5 (22...Bb5?! 23.Bd3 Bd3 24.Qd3+=) 23.Bb2 g6 24.Bg6 fg6 25.Ng6 Bg6 26.Qg6 Rf6–/+) 22...f6 23.Ng4 Bh5 24.Rc1 (worse is 24.Bh7 f5 25.Bf5 Nf5–/+) 24...Qd7 25.Bd2 Rc8 26.Qb3 Bg6 27.Rc8 Qc8 28.Bg6 hg6 29.Qd3 Nc4 30.Nf2 Qd7 31.Bc1 g5 32.e4 Qb5 33.f4 gf4 34.Qh3 Kg8 35.Qe6 Kf8 36.ed5 Ne3 37.Qc8 Kf7 38.Qe6 Kg6 39.Qe4 f5 40.Qd3 Qb4 41.Bd2= Qa4 42.Be3 fe3 43.Nd1 e2 44.Qe2 Qd4 45.Kf1 Bc5 46.Qf3 Qg1 47.Ke2 Qh2 48.Nc3 Qe5 49.Kd3 Qd4 50.Kc2 Bb4 51.Ne2 Qc4 52.Kd1 Kf6 53.Ng3 g6 54.Ne2 Bd6 55.Kd2 Qa2 56.Kd1 Qa4 57.Ke1 Qa1 58.Kd2 Bb4 59.Kc2 Qa2 60.Kc1 Ba3 61.Kd1 Qb1 62.Kd2 Bb4 (62...Bb4 63.Ke3 Qd1–+) 0–1. Rooijen Van,Peter (1675) – Kalyoncuoglu,Ozgur (2075), CP–2011–P–00022, 2011.

12.Be2 Nd2 13.Nd2 Nb6 ?! (13...dc4 !? 14.0–0 Bd2 15.Qd2 Nb6 16.Qc2 Qd5 17.Rb1) 14.c5 'White wins space' (14.0–0 Bd2 15.Qd2 dc4 16.Qc2 Qd5 17.Rb1) 14...Nc4 15.Bc4 dc4 'Black has the pair of bishops' 16.0–0 'White castles and improves king safety' 16...Bd7 17.Nc4 Bb5 18.Qb3 'White threatens to win material: Qb3xb4' 18...Qd5 'Black threatens to win material: Qd5xc4' 19.Qb4 Qc4 (19...Bc4? 20.e4 Deflection: c4 20...Qe4 21.Qc4+–) 20.Qc4 Bc4 'Opposite coloured bishops appeared' 21.Rb1 'White threatens to win material: Rb1xb7' 21...Rb8 22.Bc3 b5 23.cb6 cb6 24.h4 Ba2 ½–½. Buczinski,Henryk (2205) – Pintonello,Gilberto (2055), SA–2010–0–00171, 2010.

12.Be2 Qe7 13.0–0 Nd2 14.Nd2 Nf6 15.Nf3 b6 16.Qc2 Bb7 17.Ne5.

12.Be2 Ndf6 13.0–0 Nd2 14.Nd2 Qe7 15.Nf3 Bd7 16.Qa4 dc4 17.Ne5.

10.d4 b6

11.Nc3 dc4 12.Qc2 Bb7 13.Bc4 c5 14.bc6 Bc6 =.

11.Bd3 Bb7 12.0–0 dc4 13.Bc4 Bd5 14.Bd5 ed5 15.Nc3 =.

11.Bd3 Bb7 12.0–0 dc4 13.Bc4 Qe7 14.Ne5 =.

11.Bd3 Bb7 12.0–0 Ne4 13.Qc2 Nef6 =.

11.Bd3 Bb7 12.0–0 Ne4 13.Be4 de4=+ 14.Ne5 Be5 (14...Qh4 15.Qe2=+) 15.de5= Nc5 16.Bd4 Nd3 17.Qg4 Qa8 18.Nc3 Kh8 19.h4 (19.Rd1 Nb2 20.Rc1 Nd3=) 19...Rg8 20.Qh5 Rf8 21.Qe2 (21.Rd1 Nb2 22.Rd2 Nc4=+) 21...f5 22.f4 (22.Qh5 Qd8=) 22...Qa3 (22...Qa5 23.Rd1=+) 23.Qa2= Qa2 24.Na2 Ra8 25.Nc3 Kg8 26.g4 (26.h5 Ra3=) 26...g6 (26...fg4!? 27.Kg2 Kf7=+) 27.gf5= gf5 (Black gets the initiative) 28.Ne2 (28.Kh2 Ra3=) 28...Kg7 (28...Ra4!?–/+) 29.Ra1 Kh6 30.Ra8 Ba8 31.Kf1 (31.Kg2 Bb7=) 31...Kh5=+ 32.Ng3 (32.Bc3 Bb7=+ (< 32...Kh4 33.Nd4=)) 32...Kg4–/+ (32...Kh4?! 33.Nf5 ef5 34.e6=) 33.Kg2 (33.Nh1 Kh4 34.Ke2 Nc1 35.Kd1 Nb3–/+) 33...Ne1 (34.Kf2 Nf3=+; 33...h5 34.Ne2–/+) 0–1. Tuchtenhagen,Harald (1930) – Sogaard,Verner (2360), corr ICCF WT–M–GT–246, 1988.

11.Bd3 Ne4 12.Qc2 Ndf6 =.

11.Bd3 Ne4 12.cd5 ed5 13.0–0 (13.Nc3 Bb7=) 13...Bb7 14.Qc2 Qe7 15.Bb2 g5 (15...Ra8 16.Nc3=) 16.Nc3 (16.Rc1 Rc8+=) 16...Ra8 (16...g4 17.Nd2 f5 18.Nb3+=) 17.Nd2 f5 18.Rc1 Qe6 (18...Ndf6 19.Nf3+=) 19.Nf1 g4 (19...Nb8 20.Ng3 Qh6 A) < 21.Be4 A1) < 21...de4 22.Qb3 (22.Nf5 Qh2 23.Kf1 Qh1 24.Ke2 Qg2 25.Qb3 Kf8+–) 22...Kf8 23.Na4+/–; A2) 21...fe4 22.Qb3 Bg3 23.fg3 Qe6=; B) 21.Nce4?! fe4 22.Be2 Ra2+=; C) 21.Qb3+/–) 20.Qb3 (20.f3 gf3 21.gf3 Qg6 22.Kh1 Rf8+=) 20...Ndf6 21.Ne2 h5 22.Nf4 Qd7 23.Qc2 (23.Ng6 Qe6+=) 23...Ra2 (23...h4 24.Ng6+=) 24.Ng3 (24.Ng6 Qe6+=) 24...h4 (24...Bf4 25.ef4 h4 26.Ne2+=) 25.Nge2 Qf7 (25...g3 26.hg3 hg3 27.f3=) 26.Nc3 Nc3 27.Qc3 Ne4 28.Qb3 Ra8 29.Qd1 g3 30.fg3 hg3 31.h3 Ra2 (31...Kf8 32.Ra1=) 32.Qb3 Ra8 33.Rc2 (33.Be2 Kg7=) 33...Kg7= 34.Be2 Qg8 (34...Ra5 35.Rc1=) 35.Bh5 (35.Rc1 Kf8=) ½–½. b4_player – opponent, gamecolony.com, 2008.

11.cd5 Nd5=+ 12.Nbd2 Bb7 13.Be2 Qf6 (13...c5 14.dc5 Nc5 15.0–0=+) 14.Bb2 (14.e4 Nf4 15.0–0 Qg6–/+) 14...Qg6 15.0–0 c5 (15...Ra8 16.Nc4=+) 16.bc6 Bc6 17.Qb3 (17.Nc4 Bb4=) 17...Ra8 (17...Rc8 18.e4 Nf4 19.Nh4 Ne2 20.Kh1–+) 18.Rc1= Ba4 (18...Rc8 19.e4 Nf4 20.Kf1 Qg2 21.Ke1 Ne2 22.Ke2 Bh2 23.Nh2 Qh2 24.Qb4–+) 19.Qc4 (19.Qd3 Qd3 20.Bd3 b5=) 19...f5 (19...b5 20.Qc6 Bh2 21.Kh2+–) 20.Ne5 Ne5 21.de5 Bc5 (21...b5 22.Qc6 Rd8 23.ed6+–) 22.Bf3 (22.Bd4 Bd4 23.ed4 b5+=) 22...Bc6 ½–½. Conde,Jose A – Woelfelschneider,Peter, TT–06 TSC, 2003.

11.cd5 Nd5 12.Be2 Qf6 13.Nbd2 Qg6 14.0–0 Bb7 15.Bb2 Be7 16.Qb3 Ra8 17.Rc1 f5 18.h3 Bb4 19.Nc4 Qh5 20.Ba3 Ba3 21.Na3 Qg6 22.Nc4 N5f6 23.Qd1 Bd5 24.Nb2 Ra7 25.Nd3 Qe8 26.Nb4 Qf8 27.Nd5 Nd5 28.Rc6 Qe8 29.Ng5 Qe7 30.Re6 Qg5 31.Bc4 N7f6 32.Re5 Kf8 33.Bd5 (33.Rd5?! Nd5 34.Bd5 f4=) 33...Nd7 34.f4 Qg6 35.Re6 Qg3 36.Qb1 g6? (36...Nf6 37.Qb4 Kf7 38.Qe7 Kg6 39.Rf6 gf6 40.Bf7 Kg7 41.Bc4 Kh6 42.Qf6 Qg6 43.Qh4 Qh5+–) 37.Bc6 Kf7 38.Bd7 1–0. Nemec,Zdenek (2225) – Potemri,Stefan (1720), 30. LSS No Engine Cup Final, 2011.

11.cd5 Nd5=+ 12.e4 Bb4 13.Nbd2 Nf4 =.

11.Bd3 dc4

12.Bc4 Bb7

13.0–0 Qa8 14.Nbd2 =.

13.0–0 Ne4

14.Bd3 f5 =.

14.d5 Ndc5

15.Qd4 Qf6 16.Qf6 gf6 17.de6 fe6 18.Nd4 Re8 19.f3 Ng5 20.Nd2 Kg7 (20...Nf7 21.Rd1+=) 21.Rd1 Kg6 (21...Nf7 22.N2b3 Bc8 23.Nc6+=) 22.f4 e5 (22...Nge4!?+=) 23.fg5+/– ed4 24.ed4 Nd7 25.gf6 Nf6 26.Rf1 (26.Bd3 Kg7+/–) 26...Re3+= 27.Nf3 Bd5 28.Bd5 (28.Ne5 Be5 29.de5 Bc4 30.Rf6 Kg5+=) 28...Nd5+= 29.Rb1 (29.Ne5 Be5 30.de5 Rb3+=) 29...Kf5= 30.Ne5 Re2 31.Rf1 Ke4 32.Ng4 Ne3 (32...Kd3 33.Rb1=) 33.Ne3= Re3 34.Rb1 (34.g3 Rb3=+) 34...Re2= 35.g3 (35.h3 Kd5=+) 35...Kd5 36.Rc1 Rd2 37.Re1 (37.Kh1 Ra2=+) 37...Kc4 38.Rb1 h6 39.Bb2 h5 40.Ba1 Re2 (40...h4 41.Rc1 Kb5 42.Bc3–/+) 41.Rf1 (41.d5!?–/+) 41...Kb5–+ 42.Rf2 Re1 43.Rf1 Rf1 44.Kf1 Kc4 45.Kf2 b5 46.Ke3 b4 47.h3? Bg3 48.Ke2 0–1. b4_player – opponent, gamecolony.com, 2007.

15.Qd4 Nf6

16.de6 fe6 17.Nbd2 =.

16.de6 Ne6 17.Qh4 Nd5 18.Qg4 Nf6 19.Qf5 Be4 20.Qh3 Re8 21.Qh4 Bf3 +=.

16.de6 Ne6 17.Qh4 Nd5 18.Qh5 Nf6 19.Qf5 Be4 20.Qh3 Nc5 21.Nc3 Bb7 +=.

16.de6 Ne6 17.Qh4 Nd7 18.Rd1 Ne5 19.Be5 Qh4 20.Nh4 Be5 21.Nf5 Ra8 =.

16.de6 Ne6 17.Qh4 Nd7 18.Nbd2 Qh4 19.Nh4 g6 20.Nhf3 c5 21.Bc3 h6 =.

16.de6 Ne6 17.Qh4 Nd7 18.Qd8 Rd8 19.Rd1 Ndc5 20.Nd4 Be5 21.Re1 Bf6 =.

16.de6 Ne6 17.Qh4 Nd7 18.Qg4 Bf3 19.gf3 Qe7 20.f4 Rd8 21.Rd1 Nf6 +=.

16.de6 Ne6 17.Qh4 Nd7 18.Qh3 Bf3 19.gf3 Qg5 20.Kh1 Qe7 21.Nc3 Ra8 =.

16.de6 Ne6 17.Qh4 Nd7 18.Qh5 Qe7 19.Nbd2 Rd8 20.Rd1 c6 21.bc6 Bc6 =.

16.de6 Ne6 17.Qh4 Ne4 18.Qg4 (18.Qh5 Qe7 (18...Nf6) 19.Nc3 Nc3 20.Bc3 Bf3 21.gf3 Rc8=) 18...Qe7 (18...Nf6 19.Qf5 Be4 20.Qh3 Re8 21.Qh4 Bf3+=) 19.Nc3 (19.Nd4 Nd4 20.Bd4 Be5= 21.Rd1 Nd6=) 19...Nf6 20.Qh3 (20.Qf5 Rd8 21.Rc1 c6=) 20...h6 (20...Rd8 21.Rc1 Ba3=) 21.Rd1 (21.Bb2 Ra8+=) 21...Ra8 (21...Rd8=) 22.Bb2 Ba3 23.Ba1 (23.Ba3 Ra3 24.Ne2 Ne4=) 23...Bb4 (23...Bd6 24.Qf5+=) 24.Ne2 Rd8 25.Ned4 Nd4 26.Bd4 (< 26.ed4 Bd5 27.Bd5 Rd5 28.Qc8 Kh7=+) 26...Bc3 27.Qg3 Bf3 28.Qf3 Bd4 29.ed4 g6 30.g3 Kg7 31.Qc6 Qd6 32.Qf3 Re8 33.Kg2 h5 34.h4 Re7 35.Qd3 Ng4 36.Qc3 Re8 37.Ra1 Qf6 38.Qb2 Qf5 39.Kg1 Re7 40.Qd2 Rd7 41.Rc1 Qf6 42.Rd1 Nh6 43.d5 Re7 44.Kg2 Re4 45.Rc1 Ng4 46.Qc3 Qc3=+ 47.Rc3 Nf6 48.Kf3 Rd4 49.Be2 Nd5 50.Rc6 Kf8 51.Bc4 Ke8 52.Bd5 Rd5 53.Rc7 Rb5 54.Rb7 Kf8 55.Kf4 Kg7 56.f3 Rb4 57.Kg5 b5 58.g4 Rd4 59.gh5 Rd5 60.Kf4 Rh5 61.Ke3 Rc5 62.Ke4 Rc4 63.Kd3 Rb4 64.Rb6 Rb3 65.Ke4 b4 66.Rb5 Rb1 67.h5 f5 68.Kf4 gh5 69.Kf5 b3 70.Rb7 Kf8 71.f4 b2 72.Rb6 h4 73.Rf6? Ke8 74.Rb6 Kd7 75.Rb3 Kc6 76.Rc3 Kb5 77.Rc7 Ka4 78.Ra7 Kb3 79.Rb7 Kc3 80.Rc7 Kd2 81.Rd7 Ke2 82.Re7 Kf3 83.Rd7 Rc1 84.Rd3 Ke2 85.Rb3 b1Q 86.Rb1 0–1. pierre – crispyduck, internet, 2008.

10.d4 dc4

11.Bc4 b6 12.0–0 Bb7 13.Nc3 Qa8 14.Bb2 Bf3 (14...c5 15.dc5 Bc5 16.Be2=) 15.Qf3+= Qf3 16.gf3 Ra8 17.Ra1 Ra1 (17...Ra5 18.f4+=) 18.Ba1+= Kf8 19.Bb2 Ke7 20.e4 Bb4 (20...e5 21.Ne2=) 21.Na2 Bd2 22.Kf1 Nh5 (22...Nb8 23.Ba3 Kd7 24.Bf8=) 23.Ke2 (23.Nc1 Nf4+=) 23...Bg5 (23...Bf4 24.h3=) 24.Nb4+= Nf4 25.Kf1 Ke8 26.Nc6 (26.Na6 Kd8+=) 26...Nf6 (26...Nf8 27.Ne5=) 27.Bc1 N6h5 28.Be3 Bh4 (28...Nh3 29.Bb3+=) 29.Ke1 Ng2 30.Kd2 h6 31.Bf1 Nhf4 32.Bg2 Ng2 33.f4 f5 34.f3 Kd7 35.Ke2 Ne3 36.Ke3 Kd6 37.Ke2 h5 38.Kd3 Bf2 39.Ne5 Bg1 40.h3 Bf2 41.Ng6 Kd7 42.Kc4 Ke8 43.Kc3 Kf7 44.Ne5 Kf6 45.Kd3 Bg3 46.Ke3 Bh2 47.Nc6 g6 48.Nb4+= ½–½. orane – linear, caissa.com, 2006.

11.Bc4 Nd5 =+.

11.Nbd2 =+.

11.Bc4 Nb6

12.Bd3 Nbd5 13.0–0 Nb4 14.e4 =.

12.Bd3 Nfd5 13.0–0 Nb4 14.Be2 Bd7 15.Nc3 =.

12.Bd3 Nfd5 13.0–0 Nb4 14.Be2 Qe8 15.Nc3 Bd7 16.Qb3 N4d5 17.Rc1 Qe7 18.Ne4 Ra8 19.Nd6 Qd6 20.Bd3 (20.Bb2 Ra4+=) 20...f6 (20...Nb4 21.Bf1+=) 21.Bb2 (21.Qc2 h6 22.Bc3 c6=) 21...Qb4= 22.Qb4 Nb4 23.Bf1 c6 24.bc6 Bc6 25.Ra1 Ra1 26.Ba1 Nc2 (26...Na4 27.Ne1=) 27.Bc3 Nd5 28.Bd2 b5 29.Ne1 Ne1 30.Be1 f5 31.Bd3 Kf7 32.Ba5 g6 33.h3 e5 34.de5 Ke6 35.f4 Ne3 36.g3 Nc4 37.Bb4 g5 38.Kf2 Be4 39.Be2 Bc2 40.Bc3 gf4 41.gf4 Be4 42.Bb4 Bc6 43.h4 Nb6 44.Bd1 (44.h5 Nc4=) 44...Be4 (44...Nc4 45.Bb3=) 45.h5 Nd5 46.Bb3 Bd3 47.Bd5 Kd5 48.Ke3 Be4 49.Bd6 (49.Bf8 Kc4+=) 49...Kc4 50.Kd2 Bd5 51.h6 Kd4 52.Be7 Ke4 53.Bg5 b4 54.Kc2 Be6 55.Kb2. b4_player – opponent, gamecolony.com, 2008.

12.Bd3 Nfd5 13.0–0 Nb4 14.Be2 Qf6 15.Nbd2 Qh6 16.Qb3 N4d5 17.Ne4 Be7 18.Bb2 Nd7 (18...f5 19.Nc5+=) 19.Ra1 Qg6 20.Bd3 f5 21.Nc3 N5b6 22.Ra7 Bd6 23.Ba3 Qf6 24.e4 Ba3 25.Qa3 Qh6 26.e5 Re8 27.Qb3 Qc1 28.Bf1 Re7 29.Na2 Qh6 30.Nb4 Nf8 31.Qc2 Qh5 (31...Ng6 32.Nd3+/–) 32.Nd2 Nd5 33.Nd5 ed5 34.Nb3 f4 35.Be2 Qf7 36.Na5 Ne6 37.Qd1 (37.Nb7 Nd4 38.Qd3 Ne2 39.Qe2 Qe8–/+) 37...c5 (37...Qe8 38.Qd3+/– (38.Nb7? Bb7 39.Qd3 c5 40.bc6 Qc6–+)) 38.bc6+– bc6 39.Re7 Qe7 40.Nc6 Qc7 41.Qc2 (41.Nb4 Qa5 42.Qc1 Bb7+/–) 41...Bd7+/– 42.Bg4 Qb6 43.h3 Qc6 44.Qc6 Bc6 45.Be6 Kf8 46.g3 fg3 47.fg3 Ke7 48.Bg8 g6 49.Kf2 h6 50.h4 Kf8 51.Be6 Ke7 52.Bg4 Ba4 53.Ke3 g5 54.Kd2 Bb5 55.Kc3 Bf1 56.hg5 hg5 57.Bf5 Bg2 58.Kb4 Bf3 59.Kc5 Bg2 60.Bh7 Kf8 61.Kd6 (61...Bf3 62.Bg6+–) 1–0. Tihomir Glowatzky – ChelseaMick, ChessWorld.net, 2005.

12.Bd3 Bd7 13.0–0 Qe8 14.e4 Ng4 += (< 14...Bb5 15.e5+/–).

12.Bd3 Bd7 13.Nbd2 Qa8 14.0–0 Qa2 (14...Qa5 15.e4 Bf4 16.Qe2=) 15.e4 Bf4 16.g3 (16.Nb3 c6+=) 16...Bh6 (16...Bd2 17.Qd2 Qd2 18.Nd2+=) 17.Qc1 (17.Nb3 c6=) 17...Rc8 (17...c6 18.Qc5 Na4 19.Qb4 cb5 20.d5 ed5 21.e5=) 18.Bc3 Na4 (18...c6 19.bc6 Bc6 20.Qb1 Qb1 21.Rb1= (21.Nb1? Be4 22.Be4 Ne4–+)) 19.Bb4 +=.

12.Bd3 Bd7 13.Nbd2 Nbd5 14.0–0 =.

10.d4 c5

11.dc5 Nc5 12.Be2 Qa5 13.Bc3 Qd8 14.0–0 Nce4 15.Bd4 dc4 16.Bc4 Qc7 17.Qc2 Ng4 18.h3 Bh2 19.Kh1 Nef2 20.Rf2 Nf2 21.Qf2 Qc4 22.Kh2 Qb5 23.Nc3 Qc6 24.Ne5 Qc7 25.Nb5 Qb8 26.Kg1 f6 27.Qa2 b6 (27...fe5? 28.Ba7 Qa8 29.Nc7+–) 28.Nc4 Rd8 29.Qb3 (worse is 29.Nb6 Rd4 30.Nd4 Qb6–/+; 29.Bb6?! Rd1 30.Kf2 Qh2+=) 29...Bb7 30.Nb6 (30.Bb6?? Qg3 31.e4 Qb3 32.Bd8 Qc4–+) 30...Kf7 31.Nc4 Bc6 32.Nbd6 Kg8 33.Qb8 Rb8 34.Kf2 Rb4 35.Bc3 Rb3 36.Bd4 ½–½. Nemec,Zdenek (2055) – Luers,Charles (1835), SB–2010–0–00111, 2010.

11.dc5 Nc5–/+ 12.Be2 Qe7 13.0–0+= (13.Nbd2 Rd8 14.0–0 e5 15.cd5 e4 16.Nd4 Nd5 17.Nc4 Bc7 18.Qd2; 13.Nc3 dc4 14.Bc4 b6 15.0–0 Bb7 16.Nd4 Rc8 17.Nc6 Qc7 18.f4) 13...b6 (13...Rd8 14.Qc2+= (14.Nbd2 e5 15.cd5 e4 16.Nd4 Nd5 17.Nc4 Bc7 18.Qd2) 14...b6 15.cd5 ed5 16.Nc3 Bg4 17.Rd1 Ra8 18.Bb2; 13...h6 14.Nbd2 b6 15.Ne5 Bb7 16.Nc6 Qd7 17.Bf6 gf6 18.Qa1) 14.Bf6= (14.Nbd2 Bb7 15.cd5 ed5 16.Nd4 Qd7 17.Nc6 Bc6 18.bc6) 14...Qf6 15.cd5 ed5 (15...Ne4 16.de6 Qe6 17.Bd3= Rd8 18.Nd4) 16.Qd5 Bb7 (16...Rd8 17.Qg5 Qg5 18.Ng5=) 17.Qd4 Qe7 (17...Qg6 18.Nc3=) 18.Qh4 (18.Nc3=) 18...Qh4 (18...Qe6 19.Nc3=) 19.Nh4 Ne4 (19...Bc7 20.Nd2+=) 20.Rd1+= Bb4 (20...Bc5 21.Nf3+=) 21.Nf3 Rc8 (21...Re8 22.Nd4+=) 22.Ne5 g6 (22...h6!?+=) 23.Nc4+/– Bc5 (23...Kg7 24.f3 Nf6 25.Nb6+/–) 24.f3 Nf6 25.Nc3 Be3 26.Ne3 Rc3 27.Rd8 Kg7 28.Kf2 Bc8+= 29.Bc4 Be6 30.Be6 fe6 31.Rd6 Nd5 32.Nd5 ed5 33.Rb6 Rb3 34.h4 h6 35.g4+/– d4 36.f4 h5 37.gh5 gh5 38.Rb8 Rb4? 39.b6+– d3 40.Ke3 d2 41.Kd2 Rf4 42.Kc3 (42.Kc3 Rf1 43.Kb4 Rb1 44.Ka5 Ra1 45.Kb5 Rb1 46.Kc6 Rc1 47.Kb7+–) 1–0. Johannes,Jan (2190) – Paz,Gustavo (2075), CiF, 2008.

11.bc6 bc6 12.c5 Be7 13.Nc3 Qa5 14.Bb2 Ne4 15.Qa1 Qa1 16.Ba1 f5 17.Nd2 Bb7 18.Nde4 fe4 19.Be2 e5 20.0–0 Ra8 21.Rb1 ed4 22.ed4 Bf6 23.Nd1 (23.Bg4!? Bc8 24.Ne2+=) 23...Ba6 24.Ba6 Ra6 25.Bc3 Ra4 26.Rb7 Bd4 27.Bd4 (27.Rd7? Bc3 28.Kf1 Bb4–+) 27...Rd4 28.Ne3 Nc5 29.Rg7 Kg7 30.Nf5 Kf6 31.Nd4 Ke7 32.Nc6 Kd6 33.Nd4 Ne6 34.Ne6 Ke6 35.Kf1 Ke5 36.Ke2 Kf4 37.f3 ef3 38.gf3 h5 39.Kf2 d4 40.Ke2 d3 41.Kd3 ½–½. pvanr (2060) – gamebiteer (2285), gameknot.com, 2012.

11.bc6 bc6 12.c5 Be7 13.Bd3 e5 14.de5 Ne4 15.0–0 Ndc5 16.Bd4 (16.Be2!?+=) 16...Nd3–/+ 17.Qd3 Bf5 18.Rc1 Qd7 19.Nbd2 (19.Qd1!?–/+) 19...Nf2!–+ 20.Qc3? (20.Kf2 Bd3 Discovered attack) 20...Nd3 21.Rc2 (21.Qc6 Nc1 22.Qc1–+) 21...c5 22.Bc5 (22.Nb3 Qa4 23.e6 cd4 24.Nfd4 Be4–+) 22...Bc5 23.Nf1 (23.Nd4 Bd4 24.Qd4 Nf4 25.ef4 Bc2–+) 23...Ra8 24.Nd4 Ra3 25.Qd2 Bd4 26.ed4 Qa4 27.Qg5 (27.e6 Qd4 28.Qe3 Qe3 29.Ne3 Ra1 30.Nf1 fe6–+) 27...h6 28.Rc7 (28.Qf5 Qc2 29.e6–+) 28…hg5 0–1. guillaume54 (1740) – glovio (2035), gameknot.com, 2014.

11.bc6 bc6 12.Nbd2 c5 13.Be2 cd4 14.Bd4 Bb7 15.cd5 Bd5 (worse is 15...ed5 16.Qb1 Qa8 17.0–0+=) 16.0–0 Qc7 17.Qc1 Rc8 18.Qc7 Rc7 19.h3 g6 20.Ba1 Kf8 21.Rd1 Ke7 ½–½. Degterev,Pavel (2275) – Tsenkov,Ljubomir (2365), WC–2011–S–00003, 2008.

11.cd5 cd4 12.de6+= Bb4 13.Nbd2 fe6 14.Bc4 (14.Nd4? Ne4 15.Ne6 Qa5–+ (15...Bd2 16.Qd2 Nd2 17.Nd8 Nf1 18.Ne6 Ne3 19.fe3+/–); 14.Bd4?! Ne4 15.Bc4 Rf3 16.Be6 Kh8 17.Qf3 Ndf6= (< 17...Bd2 18.Ke2 Ng5 19.Qd5 Ne6 20.Qe6+=; 17...Nd2?? 18.Bg7 Kg7 19.Qg4 Kh6 20.Qb4+–)) 14...Nb6 15.Qb3 (15.0–0 de3 16.fe3 Nfd5=) 15...Bd2 16.Nd2 de3 (16...Nc4!? 17.Nc4 Qd5=) 17.Be6+= (< 17.Qe3 Nc4 18.Nc4 Qd5 19.Bf6 Qc4=+) 17...Kh8 18.fe3 (18.Qe3? Re8 19.0–0 Be6 20.Bf6 gf6–+) 18...Qd6 (18...Be6 19.Qe6 Re8 20.Qb3+=) 19.Bc4 Bg4 (19...Bd7 20.Bd3+=) 20.Bd4+/– Nc4 21.Nc4 (21.Qc4? Rc8 22.Ne4 Ne4 23.Bg7 Kg7 24.Qe4 Bf5 25.Qf5 Qb4 26.Ke2 Qb2 27.Kf3 Rf8 28.Qf8 Kf8–+) 21...Qd5 22.0–0 Be2 23.Qa3 Re8 24.Rf6 gf6 25.Nd6 Rb8 26.Qb4 Qe6 27.Ne4+/– Rc8 28.h4 Kg7 29.Nf6 Rc1 30.Kh2 Kg6 31.Qd2 Qd6+– 32.g3 Qc7 33.e4 h6 34.Ng8 Kf7 35.Nh6 Ke8 36.Qg5 Rc2 37.Kg1 Rc1+/– 38.Kg2 Bf1 39.Kf3+– Bg2? 40.Kg2 Qc2 41.Kh3 Rh1 42.Kg4 Qd1 43.Kf5 Qd4 44.Qg6 Kd7 45.Qe6 Kc7 46.Kg6 Rb1 47.Nf5 Qd3 48.h5 (48...Rb5 49.Qe7 Kc6 50.h6 Rf5 51.ef5 Qg3 52.Qg5+–) 1–0. Bendig,Frank (2370) – Geiger,Walter (2065), TE.2004.P.01707, 2004.

11.cd5 ed5 12.dc5 Nc5 13.Be2 Nce4 14.0–0 Qa5 15.Nbd2 Nc3 The isolani on b5 becomes a target 16.Bc3 Qc3 17.Qa4 Bc5 18.Nb3 (better is 18.Qa1 Ne4 19.Qc3 Nc3 20.Bd3=) 18...Be3!–/+ 19.Nfd4 (19.fe3 Qe3 Double attack) 19...Ne4 20.fe3 Qe3 21.Kh1 Bg4 22.Bg4?? (22.Nc1 Rc8 23.Na2 Be2 24.Ne2 Qe2 25.Ra1–+) 22…Nf2 (22...Nf2 23.Kg1 Nh3 24.Kh1 Qg1 25.Rg1 Nf2) 0–1. Jostov,Keylah – Szczepanski,Zbigniew (2480), OP–2011–0–01530, 2011.

11.cd5 ed5 12.dc5 Nc5 13.Be2 Nce4 14.0–0 Qc7 =.

11.cd5 ed5 12.dc5 Nc5 13.Be2 Nce4 14.0–0 Be6 15.Nbd2 Qc7 16.Bd3 Ra8 17.Bd4 Nc3 18.b6 Qc8 19.Qe1 Nfe4 20.Nb1 Na2 21.Nbd2 Bb4 22.Qd1 Nac3 23.Qb3 Bd6 24.Nb1 Na2 25.Bb5 Ra5 26.Rd1 Nb4 27.Bf1 Ra2 28.Nbd2 Rc2 29.h3 h6 30.Qa4 Ra2 31.Qb3 Qc6 32.Bd3 Nc5 33.Qb4 Nd3 34.Qb1 Qa4 35.Nf1 Nf2 36.Rd2 Rd2 37.N3d2 Ne4 38.Ne4 de4 39.Qe4 Qd7 40.Qf3 Qc8 41.Qe4 Bf5 42.Qd5 Qd7 43.Be5 Bb4 44.Qd7 Bd7 45.Bd4 Be1 46.e4 Bc6 47.e5 Kf8 48.Ne3 g6 49.Nc2 Bg3 50.Nb4 Be4 51.Na2 ½–½. pierre – jarek59, internet, 2007.

11.cd5 ed5 12.dc5 Nc5 13.Be2 Nce4 (13...Be6 14.0–0=) 14.0–0 Be6 (14...Qe7 15.Bd4=) 15.Bd4 Qa5 (15...Qc7 16.b6 Qc6 17.Qb3=) 16.Qd3 Bb4 (16...Rc8 17.Nbd2=) 17.Rd1 (17.Be5 Rc8=) 17...Rc8 (17...Ng4 18.Rf1=) 18.Nfd2 Qa4 19.Qb3 Qb3 20.Nb3 Rc2 21.Nc1 Nd7 22.Kf1 (22.Bd3 Rc8=) 22...Ndc5 (22...Bc5 23.Nb3 Bd6 24.f3=) 23.f3 Nd6 24.Nd3 Nd3 25.Bd3 Rc8 26.Nd2 Bd7 27.b6 Nc4 (27...Nb5 28.Bb5 Bb5 29.Kf2=) 28.Nc4 dc4 29.Bc2 Bc6 30.Ra1 Rd8 31.Ke2+= f6 32.Ba4 Bd5 33.Bb5 Bd6 34.Rd1+/– Be7 35.Bf6 Bf6 36.Rd5 c3 37.Bc4 Kf8 38.Kd3 Rc8 39.Bb3 Rc6 40.Kc2 Rb6+= 41.e4 Re6 42.Rb5 Re7 43.Bd5 Bd4 44.Bb7 Rc7 45.f4 Bg1 46.h3 Be3 47.f5 Ke7 48.e5 Rc4 49.Bd5+– Rc7 50.g4 Bf4 51.Bg8 h6 52.Bb3 Ke8? 53.h4 Rc8 54.f6 Kf8 55.Rb7 gf6 56.ef6 Rb8 57.Rg7 Ke8 58.g5 hg5 59.hg5 Rb6 60.Rg8 Kd7 61.f7 Bd6 62.g6 Bb4 63.g7 Rf6 64.Ba4 Kc7 65.Ra8 Rf2 66.Kb3 Rb2 67.Kc4 c2 68.Bc2!! Be7 69.g8Q Rc2 70.Kd3 (70...Rd2 71.Kd2 Bf8 72.Qf8 Kb6 73.Qd6 Kb5 74.Rb8 Kc4 75.Rb4#) 1–0. b4_player – opponent, gamecolony.com, 2007.

11.cd5 ed5 12.dc5 Nc5 13.Be2 Nce4 14.Nbd2 Qc7 0–1. zack1984 (2020) – jdhjr (2340), gameknot.com, 2016.

11.cd5 Nd5 12.Nc3 =.

10.d4 Ne4

11.Nbd2 Qf6 12.c5 Be7 13.Be2 Qg6 14.0–0 e5 15.Re1 (worse is 15.de5 Ndc5 (worse is 15...Bc5 16.Qc2+=) 16.Kh1 Bg4+=) 15...Re8 16.c6 bc6 17.bc6 Nd2 18.Qd2 (worse is 18.Nd2 Qc6 19.de5 Bb4+=) 18...Qc6 19.de5 Nc5 20.Rc1 Qa8 21.Qe1 Bf5 22.Nd4 Bd7 23.Bc3 Rb8 24.Bb4 Nd3 25.Bd3 Bb4 26.Qd1 c5 27.Nf5 c4 28.Qg4 Bf5 29.Bf5 Bd2 30.Rf1 c3 31.e6 fe6 32.Be6 Kh8 33.Qd4 Rd8 34.Bf5 Rf8 35.Bc2 Qa2 36.Qd3 ½–½. usingprogram (2005) – stolpe06 (1710), kurnik, 2011.

11.Bd3 Bb4 12.Nbd2 Nb6 13.c5 Nc4 14.Bc4 dc4 15.0–0 Nd2 +=.

11.Bd3 Bb4 12.Nbd2 Nd2 13.Nd2 Nf6 14.0–0 Bd7 15.Qc2 dc4 =.

11.Bd3 Bb4 12.Nfd2= Nd2 13.Nd2 h6 14.0–0 c6 15.bc6 bc6 +=.

11.Bd3 Bb4 12.Nfd2= Ndf6 13.0–0 Nd2 14.Nd2 Bd7 15.Qc2 dc4 =.

11.Bd3 b6 12.Qc2 Bb7 13.Nc3 Ndf6 14.cd5 ed5 15.0–0 Qe7 =.

11.Bd3 c5 12.0–0 b6 13.Qc2 Bb7 14.Ne5 Be5 15.de5 Qg5 =.

11.Bd3 c5 12.0–0 f5 13.Nc3 cd4 14.Nd4 Ndf6 15.cd5 Nc3 =.

11.Bd3 c5 12.0–0 Ndf6 13.Qc2 g6 (13...b6 14.dc5 bc5 15.Nc3= Bb7=) 14.Nbd2 (14.Rd1 b6+/– (14...cd4 15.Bd4 Qe7+/–) 15.Nbd2 Nd2+=) 14...Nd2 (14...cd4 15.Bd4 Nd2+=) 15.Qd2 dc4 (15...cd4+=) 16.Bc4 Ne4 17.Qb2 Be7 18.Rd1 (18.dc5 Bf6 19.Qb4 Ba1 20.Ra1 Qe7+/–) 18...f5 (18...Nf6 19.Qc2+/–) 19.d5+– Bf6 20.Qb3 Ba1 21.Ra1 (21.de6!? Qe7 22.Ra1+/–) 21...Qf6+/– 22.Ra7 Nd6 23.h4 (23.de6!? Re8 24.Qd3 Nc4 25.Qc4+=) 23...e5= 24.Qc2 f4 25.e4 Bg4 26.Ng5 f3 27.g3 Qd8 28.Ne6 Qb6 29.Ra3 (29.Nf8 Qa7 30.Ne6 Qa1 31.Kh2 Qe1–+ (31...Nc4?! 32.Qc4 Qe1 33.Qc5 Be6 34.de6=)) 29...Re8 30.Ng5 Rf8 31.Qc1 Kg7 32.Ne6 Be6 33.de6 Qc7 34.Rd3+/– Qe7 35.Qa1 Kh6 36.Ba2 Ra8 37.Qe5+– Ra2 38.Rd6 Qd6 39.Qd6 Ra1 40.Kh2 Ra8 41.Qf4 Kg7 42.Qf7 Kh8 43.e7 h5 44.Qf8 Rf8 45.ef8Q+– Kh7 46.e5 c4 47.e6 g5 48.e7 gh4 49.e8Q hg3 50.fg3 (50...c3 51.Qh5#) 1–0. pierre – brenster, chesspark.com, 2008.

11.Bd3 c5 12.bc6 bc6 13.c5 Qa5 14.Nbd2 Nd2 15.Nd2 Bc7 =.

11.c5 Be7

12.Nc3 f5 13.Be2 (13.Bd3 Qe8 (13...b6 14.c6 Ndf6 15.0–0 Ng4 16.h3 Nh6 17.Bb2 Qe8 18.Qc2 Bd6+/–; 13...Ndf6 14.0–0 Qe8 15.Qc2 Qh5 16.Ne5 Nd7 17.f4 b6 18.Be2 Qe8+=) 14.0–0 Ndf6 15.Qc2 Qh5 16.Ne5 Nd7 17.f4 b6 18.Be2 Qe8+=) 13...b6 (13...Qe8 14.0–0 Bf6 15.Qd3 Qg6 16.Bb2 Qf7 17.Ra1 e5 18.c6 bc6+=; 13...Ndf6 14.0–0 Ng4 15.Ne1 Nc3 16.Bc3 e5 17.de5 Bc5 18.Nd3 Be7+=) 14.c6 Ndf6 15.0–0 Ng4 16.h3 Ngf6 (16...Nh6 17.Qd3 Qd6 18.Bb2 Nc3+/–) 17.Qc2 (17.Ne5 Bd6 18.Qd3 Be5+=) 17...Bd6 (17...Qd6 18.Bb2 Nc3+=) 18.Bb2 (18.Ne5 Ne8+=) 18...Nc3 19.Bc3 Ne4 20.Bb2 Qe7 21.Bd3 Ng5 22.Ne5 Nf7 23.Ra1 Ne5 24.de5 Bc5 25.Ra4 Qg5 26.Bd4 Qe7 27.Bc3 Qg5 28.h4 Qe7 29.g3 h6 30.Qd1 g6 31.Kg2 Kg7 32.Be2 g5 33.Bd3 Qf7 34.Qh1 Qe7 35.Bd4 Bd4 36.ed4 g4 37.Qd1 h5 38.Ra7 Rh8 39.Qd2 Rh7 40.Qf4 Kg6 41.Qe3 Rf7 42.Ra8 Rf8 43.Qf4 ½–½. pcmvr (2765) – gkthomas (2830), net–chess.com, 2014.

12.Nc3 Ndf6 A) 13.Be2 b6 (13...Nc3 14.Bc3 b6 15.c6 Ne4 16.Qd3 Qd6 17.0–0 f6 18.Ra1 Qd8+/–; 13...Re8 14.0–0 b6 15.c6 Bd6 16.Ne4 Ne4 17.Bd3 Qf6 18.Qc2 Qf5+=) 14.c6 Bb4 15.Qd3 Bd6 16.0–0 Qe7 17.Ne5 Nc3 18.Bc3 Ne4+=; B) 13.Bd3 b6 (13...c6 14.b6 Bd7 15.0–0 Qe8 16.Qc2 Nc3 17.Bc3 Kh8 18.Ra1 Kg8+–; 13...Nc3 14.Bc3 Ne4 15.Qc2 Nc3 16.Qc3 b6 17.c6 Bd6 18.0–0 Qf6+=) 14.c6 Nc3 15.Bc3 Qe8 16.Ne5 Ne4 17.Be4 de4 18.Qg4 f6+=.

12.Bd3 b6 13.c6 Bb4 14.Nbd2 Ndf6 15.0–0 Nd2 +=.

12.Bd3 b6 13.c6 Bb4 14.Nbd2 Ndf6 15.0–0 g5 (15...Be7 16.Ne5+/–) 16.Nb3+/– Ne8 17.Ne5 (17.Bb2 f6+/–) 17...f6 18.Ng4 h5 19.f3 hg4 (19...N4d6 20.Nf2+/–) 20.fe4 de4 (20...f5 21.e5+/–) 21.Be4 f5 22.Bd3 Qd5 23.Qc2 (23.Nc1 Nd6+/–) 23...Nd6 24.Nc1 Ba5 25.Ne2 (25.Qe2 Ne4+/–) 25...Nb5 26.e4 fe4 27.Rf8 (27.Be4 Rf1 28.Kf1 Na3+=) 27...Kf8 28.Be4 Na3 29.Qd3 (29.Bd5?? Nc2 30.Be4 Na1–+) 29...Qa2 30.Bc3 Nc4 31.Ng3 (31.Qd1 Ba6 32.Qf1 Ke7=) 31...Nd6 32.Qf1 (32.Bg6 Qc4 33.Bb2 Qb4=) 32...Ke7 33.Qc1 Ne4 34.Ne4 Qd5 35.Qe3 Bc3 36.Nc3 Qf5 37.Qe2 Kf7 38.Qb5 Qc2 39.Qf1 Kg6 40.Qe1 Qd3 41.Qe4 Qe4 42.Ne4 Ba6 43.Nc3 Bc4 44.Nd1 Bd5 45.Nf2 Kf5 46.Nd3 Bc6 47.Nf2 (47.Nb4 Bd5–+) 0–1. b4_player – opponent, gamecolony.com, 2007.

12.Bd3 c6 13.0–0 cb5 14.Nc3 b6 15.c6 Nc3 =.

12.Bd3 e5 13.c6 bc6 14.bc6 Bb4 15.Kf1 Nb6 16.Ne5 f6 17.Nf3 Qe7 18.Qc2 Bf5 19.Nh4 Bg4 20.h3 Be6 21.Bc3 (worse is 21.Be4 de4 22.Bc3 Bd6–/+) 21...f5 22.Nf3 Nc4 23.Kg1 Bd6 (worse is 23...Nc3 24.Nc3 Na5 25.Nb5+/–) 24.Nbd2 Ncd2 25.Bd2 Bf7 26.g3 Bh5 27.Kg2 Qe6 28.h4 h6 (worse is 28...Nd2 29.Nd2 Bb4 30.Nf3+/–) 29.Nh2 Qg6 30.Be1 Rb8 31.Rf1 Kh8 ½–½. Fels,Bernhard (2030) – Szoller,Terez (1760), BI–2009–F–00003, 2010.

12.Bd3 e5 13.c6 bc6 14.bc6 Nb6 15.de5 Bb4 +=.

10.cd5 ed5=+

11.Qc2 Nc5 12.Be2 Re8 (12...g6 13.0–0+=) 13.0–0+= Bg4 14.h3 Bh5 15.Rc1 Nfd7 (15...Bg6 16.d3+=) 16.Nc3= Nb6 17.Bb2 Nc4 18.Ba1 Nb6 19.d4 Ne4 20.Ne4 de4 21.Ne5 Be2 22.Qe2 Nd5 23.Qa2 Be7 (23...Bb4 24.Rb1 Bf8 25.Nc4=) 24.Bc3= f6 25.Nc4 Qd7 26.Bd2 b6 27.Rb1 Kf7 28.Qb3 (28.Qa4 Bd6=) 28...Ra8 29.Qc2 Qe6 30.f3 ef3 31.e4 fg2 32.Qd3 (worse is 32.Kg2 Ra4 33.Rc1 Rc4 34.Qc4 Qe4 35.Kg1 g5+=) 32...Ra4 33.ed5 Qd5 34.Rc1 Kf8 35.Bf4 Bc5 Attacks the isolani on d4 36.Be3 Be7 37.Bf2 Qb5 38.Qe4 Rc4 39.Qa8 Bd8 40.Qd8 Kf7 41.Re1 h5 42.Qe7 Kg6 43.Qe6 Rc2 44.d5 Rd2 45.Qe4 Kf7 46.Qe7 (worse is 46.Kg2 Qd5 47.Qd5 Rd5+=) 46...Kg6 47.Qc7 Qd5 48.Qg3 Kh7 49.Bb6 g5 50.Qc3 Kg6 51.Be3 Rd3 52.Qc8 h4 53.Qe8 Kh6 54.Qh8 ½–½. forsetinn (2355) – kostini (1875), gameknot.com, 2014.

11.Be2 c5 12.0–0 b6 13.d3 Bb7 14.Nbd2 Qc7 15.h3 Re8 16.Re1 h6 17.Qb3 Nh7 18.Qb2 Ne5 Black plans c4 19.d4 (19.Rc1!?+=) 19...Nf3–/+ 20.Nf3 c4 21.Ne5 Nf8 (21...Ng5 22.Bh5–/+) 22.Qc2+= Nd7 23.Nd7 Qd7 24.Qb1 Qe7 25.Bc3 Ra8 26.Bf3 (26.Qc2 Ra3–/+) 26...Ra3 27.Bd2 Rb3 28.Qa2 Bb4 (better is 28...Qd7–/+) 29.Ra1?? (better is 29.Bb4 Qb4 30.Ra1–/+) 29...Ra3–+ 30.Qb2 Ra1 31.Qa1 Bd2 32.Qa7 Qc7 (better is 32...c3 33.Bd1 Qc7–+) 33.Bd5 c3 34.Bb7 (34.Qb7?? Qb7 35.Bb7 c2–+) 34...g6 35.Qa8 Kg7 36.Be4 c2 37.Bc2 Qc2 38.Qc6? (better is 38.Qd5–/+) 38...Qb1 39.Kh2 Qf5 (39...Qf1 40.Kg3 Be1 41.Qc2 Qb5 42.Qe4–+) 40.Kg1 Qb1 41.Kh2 Qf1 42.Kg3 Be1 43.Qf3 Qb5 44.d5 (44.h4 Bb4 45.Kh2 Qc4–+) 44...Qc5 (better is 44...Qb2!? 45.d6–+) 45.e4 (45.Qe4–+) 45…Qc7 (45...Qc7 46.Qf4 Bf2 47.Kf3 Qf4 48.Kf4 b5–+) 0–1. mr5reasons1 (1610) – karvik (1755), gameknot.com, 2013.

11.Be2 c5 12.bc6 bc6 13.0–0 c5 (13...Re8 14.Qc2 Qb6 15.Nc3=) 14.Qc2 (14.Nc3 Nb8=) 14...Qc7 Black plans c4 (14...Qe7 15.Nc3=) 15.Nc3 (15.Na3 Be7=) 15...Qa5 (15...Qc6 16.Nb5=) 16.Qb2 (16.Nb5 Ba6 17.Bc3 Qb6=) 16...c4 17.Nb5 Be7 18.g4 (18.d3!? cd3 19.Bd3+=) 18...Ba6 19.Nbd4 Rb8 (19...Ng4? 20.Nc6 Bf6 21.Qf6 (21.Na5?! Bb2 22.Bb2 c3 23.Ba6 cb2+–) 21...Ngf6 22.Na5+–) 20.Qc2 Qb6 (20...Qc7 21.Nf5 Bb4 22.g5=) 21.Nf5= Bf8 22.g5 (22.Bd4 Nc5 23.Ra1 Ng4 24.Ng7 Bc8+=) 22...Ne4–/+ 23.d3 (23.h4 Qg6 24.N3d4 Ndc5+=) 23...cd3 (23...Ng5 24.Ng5 Qg6 25.dc4 Bc4 26.Bc4 dc4 27.f4+=) 24.Bd3+= Qg6 25.N5h4 (25.Ba6 Qf5 26.Be2 Bd6+=) 25...Bd3–/+ 26.Qd3 Qe6 27.Ng2 (27.Rd1 Ra8 28.Qd4 Qg4 29.Kf1 Ra2–/+) 27...Ndc5 (27...Qf5 28.Qd1–/+) 28.Qd4 ½–½. Daghan,Devran (2000) – Guven,Oguz Kagan (1850), Turkish Cup, 2016.

11.Be2 Nc5 12.0–0 Re8 13.Nc3 h6 14.Na4 Bd7 (14...Ne6 15.b6=) 15.Nc5 Bc5 16.Be5 Ng4 17.Bg3 Bc8 18.Qc2 Bd6 19.Bd6 Qd6 20.Rc1 Re7 21.Qc5 (21.d4 Nf6+=) 21...Qc5 22.Rc5 Nf6 23.Nd4 Kf8 24.f4 g6 25.Bf3 Be6 26.h3 h5 27.Be2 (27.Ne6 fe6 28.g4 hg4 29.hg4 Ne8+=) 27...Ne4= 28.Rc2 Nf6 29.Bd3 White prepares f5 29...Kg7 30.f5 Bc8 31.Rc5 Kh6? (31...g5 32.Be2=) 32.h4 (32.b6!? Ne8 33.fg6 fg6 34.Bb5+–) 32...Kg7 33.fg6 fg6= 34.Ne2 Be6 35.Nd4 Bf7 36.Be2 Ne4 37.Rc2 Nd6 38.Bf3 Nc4 39.Kf2 Kf6 40.Be2 Nd6 41.Bd3 Ne8 42.Kf3 Ke5 43.g4 hg4 44.Kg4 Nf6 45.Kg5 Attacks the isolani on g6 45...Ne4 46.Be4 Ke4? 47.Kf6+– Rd7 48.Nb3 b6+= 49.Nd4 Kd3 50.Rb2 Be8+/– 51.Ne6 Rh7 52.Nf4 Kc4+= Exerts pressure on the isolated pawn 53.d3 Kc5? 54.Ke5+/– Bb5 55.Ne6 Kc6 56.Nd4 Kd7 57.Rb5 Rh5 58.Kf6 c5 59.Kg6 Rh4 60.Nf5 Rg4 61.Kh5 Rb4 62.Rb4 cb4 63.Nd4 Kd6 64.Kg5 Kc5 65.Nb3 Kb5 66.Kf5 Ka4 67.Nd2 b3 68.Ke5 Kb4 69.Kd4 b2 70.e4 de4 71.de4 b5 72.e5 Ka3 73.Kc5 b4 74.Nc4 (74.Nc4 Ka2 75.Nb2+–) 1–0. Taus,M (2125) – Kolar,St (2065), Orlova Open Orlova CZE, 2011.

11.Be2 Qe7 12.0–0= Qe4 (12...Nc5 13.Bd4=) 13.d4 (13.Bd4 Re8=) 13...Qg6 (13...Re8 14.Nc3 Qg4 15.Qc2=+) 14.Ne5 (14.Qd3 Qh6=) 14...Qg5 (14...Qf5 15.Bd3 Qg5 16.Nd2=) 15.Nd2= Re8 (< 15...Be5 16.de5 Ne4 17.Nf3+/–; < 15...Ne5 16.de5 Bh3 17.Bf3 Be5 18.Be5 Qe5 19.gh3+/–) 16.Ndf3 Qf5 17.Qb3 Nf8 (17...Nb6 18.Bd3 Qh5 19.Bc3=+) 18.Bb2 Ng6 (18...N8d7 19.Ra1+=) 19.Ra1 (19.Bd3 Qh5+=) 19...Qh5 (19...Ne5 A) 20.Ne5?! Ne4 (< 20...Be5 21.de5 Ne4 22.f3+=) 21.f3 Nc5 22.dc5 Be5=; B) 20.de5 Be5 21.Ne5 Re5 22.Bd3+–; < 19...Be5 20.de5 Ng4 21.Qd5 N4e5 22.Ne5 Ne5 23.Rc1+/–) 20.Bd1 (20.Ng6 Qg6 21.Bd3 Qh5+=) 20...Be6 (20...Qh6 21.Bc2+=) 21.Ra7+= Rb8 22.Ba3 Ne8 (22...Ba3 23.Qa3 Ne5 24.de5+=) 23.Bd6 Nd6 24.b6 c6 25.Nc6 (25.Qa3 Nc8 26.Nd3=) 25...bc6=+ 26.b7 Nb7 27.Rb7 Rc8 28.Rb8 Rb8 29.Qb8 Nf8 30.Ba4 Bg4 (30...c5 31.dc5 Qf5 32.Nd4+–) 31.Ne5+– (31.Bc6? Bf3 32.Qg3 Be4–+) 31...Qf5 (31...Be6 32.Nc6 g6 33.h3+–) 32.Qb3 Qc8 (better is 32...c5 33.f3 Bh5+–) 33.Ng4 (33.Bc6?! Be6 34.Qb5 Qc7+–) 33...Qg4 34.Bc6 Qc8 35.Qd5 Qa6 (35...Ne6 36.h3+–) 36.g3 Qa3 (36...Qb6 37.Kg2+–) 37.Kg2 Qe7 38.e4 (38...Ne6 39.Qe5+–) 1–0. Mehlhorn,U – Scharf,R, H–2076–D, 2000.

10.Be2 dc4=+

11.Bc4 b6 12.0–0 Bb7 13.d3 Qe7 =.

11.Bc4 b6 12.Ng5 Bb7=+ 13.Be6 (13.Nf3 Qe7=+) 13...fe6–/+ 14.Ne6 Qa8 15.Nf8 Kf8 (15...Bf8!? 16.Bf6 Bg2–/+ (16...Nf6?! 17.f3=)) 16.Bf6=+ Nf6 17.f3 Qa5 (17...Bd5 18.Qc2=+) 18.Qe2= c6 (18...c5 19.0–0=) 19.bc6 (19.Qd3 Qb4=) 19...Ba6=+ 20.Qd1 Nd5 21.Kf2 Nb4 22.g3 (22.Nc3 Qc5=+) 22...Qb5 23.Nc3 (23.Kg2 Qc6 24.Nc3 Bd3=+) 23...Nd3 (23...Qc6 24.Kg2=+) 24.Kg2 Qc6 25.Qc2 (25.Qa4 Qa4 26.Na4 b5=+) 25...Qc4 (25...Bc4 26.Ra1–/+) 26.Qa4 (26.Ra1 Bb7=) 26...Qa4=+ 27.Na4 b5 28.Rb1?? (better is 28.Nc3 b4 29.Ne4=+) 28...ba4–+ 29.Rb6 (29.Ra1 a3 30.h4 Bc4–+) 29…Nb4 (30.Rd6 a3 31.Rd8 Ke7–+) 0–1. Lea,Per – Soegaard,Werner, corr ICCF WT–II–207, 1976.

11.Bc4 Nb6 12.d3 =+.

11.Bc4 e5

12.Qc2 e4 13.Ng5 Nb6 14.Bb3 (worse is 14.Ne4 A) worse is 14...Nc4 15.Nf6 (worse is 15.Qc4 Ne4 16.Qe4 Re8+=) 15...gf6 16.Qc4+= ; B) 14...Ne4 15.Qe4 Re8–/+) 14...Bf5 15.Nc3 Increases the pressure on e4 15...Qd7 (15...Be5!? 16.f3 Bg6=) 16.0–0+= Qe7 17.f3 Qe5 18.f4 Qe7 19.Ne2 Nh5? (19...Bd7 20.Ng3 h6 (worse is 20...Bb5 21.Bf6 Qf6 22.N3e4+–) 21.N3e4 Ne4 (21...hg5?? 22.Nf6 Qf6 23.Bf6+–) 22.Ne4 Be6+–) 20.Nd4+– Bg6 21.g4 Nf6 (21...Nf4 22.ef4 h6 23.Nf7 Rf7 24.Bf7 Bf7 25.Nf5+–) 22.f5 Bh2 (22...Ng4?? 23.fg6 Bh2 24.Kh1 hg6 25.Nf7+–) 23.Kg2 (23.Kh2?! Ng4 24.Kh3 Qg5 25.fg6 Qh5 26.Kg3 Qh2 27.Kg4 Qg2 28.Kh4 Qh2 29.Kg5 Qg2 30.Kh4 Qh2 31.Kg4 Qg2 32.Kh4=) 23...Ng4 24.Ne4 (24.fg6 Qg5 25.Bf7 Kh8–+) 24...Bh5 (24...Nd7 25.fg6 hg6+–) 25.f6! Qd7 (25...Nf6 26.Kh2 Deflection; 25...gf6 26.Nf5 Decoy) 26.Nc5 Qc8 (26...Bg6 27.Nd7 Bc2 28.Nc2 gf6 29.Nf8 Kf8 30.Bf6 Be5+–) 27.Nf5 Re8 28.Ne7 Re7 29.fe7 Nf6 30.Bf6 Qe8 31.Ne4 Bg6 32.Kh2 Nc8 33.Qc7 Ne7 34.Nd6 gf6 35.Ne8 Kf8 36.Nf6 h5 37.Qd8 Kg7 38.Qe7 b6 39.Rg1 h4 40.Kh3 Kh8 41.Qf8 1–0. usingprogram (2010) – diagol (1875), kurnik, 2011.

12.d4 e4 13.Ne5 Qe7 14.Nd7 Nd7 15.Qh5 Nb6 16.Bb3 Bb4–+ 17.Ke2 Be6 18.d5 Bd7 19.f4 Bb5 20.Kf2 Bc4 21.Bc4–/+ Nc4 22.Rc1 b5 23.Nc3 Bc5 24.Re1 b4 25.d6 Qd6 26.Nd5 f6 27.Rd1 Qe6 28.Nc7? Be3–+ (29.Ke2 Qf7 30.Qf7 Rf7 31.Rd8 Rf8–+) 0–1. Rodriguez,Alberto2 (2310) – Panno,Oscar (2520), Buenos Aires BCA, 1987.

9.c4 dc4

10.Bc4 0–0 11.d4 =.

10.Bc4 Nb6

11.d3 Nc4 12.dc4 b6 13.0–0 Bb7 14.Be5?? Bf3–+ 15.Bf6 Bh2! (16.Kh2 Qd1 (16...Bd1? 17.Bd8 Be2 18.Re1+–) 17.Rd1 Bd1 18.Bg7 Rg8–/+; 15...Bd1?! 16.Bd8 Be2 17.Re1–/+; 15...Qf6?! 16.Qf3 Qf3 17.gf3=+) 0–1. Buss,Michael – Dyer,Darryl, USCF85CC211, 1985.

11.Be2 0–0

12.0–0 Nfd5 13.Nc3 (13.e4 Nb4 (13...Nf4 14.Bd4 Nd7 15.e5 Be7 16.Bc4 f6 17.ef6 Bf6 18.Qe1 Kh8 19.Be3=) 14.e5 Be7 15.Bd4 c5 16.Be3 N6d5 17.Nc3 Ne3 18.de3 Qb6 19.Qb3=) 13...Nc3 (13...Bd7 14.Ne4 Bb4 15.Qc2 f6 16.Bd4 c6 17.bc6 Bc6 18.Bc5 f5 19.Neg5+=) 14.Bc3 Nd5 15.Bd4 Qe7 16.Qb3 Rd8 17.Rd1 Bd7 18.Ra1 c5 19.bc6 =.

12.0–0 Nbd7 13.d4 Nb6 (13...Nd5 14.Nc3 N7f6 15.Ne5 Qe7 16.Bc4 Rd8 17.Qf3 Nc3 18.Bc3 Nd5 19.Bd5+=) 14.Qc2 Nbd5 15.Ne5 Bd7 16.Nd2 Qe8 17.Rb1 Bb4 18.e4 Bd2 19.ed5 =.

12.0–0 Nbd5

13.Bb2 Bd7 14.Be5 Qe7 15.d4 Ra8 16.Qc2 c6 17.Bd6 Qd6 18.Ne5 cb5 19.Nd2 =.

13.Qb3 Qd7 14.Be5 b6 15.Nc3 Bb7 16.Ra1 Ra8 17.Ra8 Ba8 18.Nd5 Bd5 19.Qb2 =+.

13.Qc1 Bd7 14.Be5 Qe7 15.Nc3 Ra8 16.d4 Ra3 17.Bd6 Qd6 18.Nd5 ed5 19.Qc2 =.

13.Qe1 c6 14.bc6 bc6 15.Be5 Bb7 16.Nc3 c5 17.d4 Be5 18.de5 Nd7 19.Na4 =+.

13.Be5 Re8 14.d4 Ng4 15.Bd6 Qd6 16.e4 Nf4 17.e5 Qb4 18.h3 Nh6 19.Bd3 =.

12.0–0 Bd7

13.Qc2 c6 14.Be5 Qe7 15.d4 cb5 16.Qb3 Bc6 17.Rc1 Rc8 18.Nbd2 b4 19.e4 =.

13.Qc2 Nbd5 14.Be5 Qe8 15.Bd6 cd6 16.Qb3 e5 17.d4 e4 18.Nfd2 Qe6 19.Bc4 +=.

13.Qc2 Nfd5 14.Be5 Be5 15.Ne5 Qe8 16.Nd7 Qd7 17.d4 Ra8 18.Nc3 Nc3 19.Qc3 Ra2 =.

13.Qc2 Nfd5 14.Be5 Be5 15.Ne5 f6 16.Nd7 Qd7 17.d4 Ra8 18.Rc1 Nb4 19.Qc5 =.

13.Qc2 Qe7= 14.Be5 Rc8 15.d4 c6 16.bc6 Bc6 17.Qb3 Nbd7 18.Bd6 Qd6 19.Nbd2 Bd5 =.

13.Nc3 e5 14.e4 Bg4 15.d4 ed4 16.Nd4 Qd7 17.Bg4 Ng4 18.h3 Nh2 19.Re1 Be5 +=.

13.Nc3 Qe7 14.e4 (14.Qc2 Ra8= 15.Ne4 Ne4 16.Qe4 Nd5 17.Be5 Be5 18.Qe5 f6 19.Qb2 Qa3=; 14.d4 Nbd5 15.Qc2 Nb4 16.Qa4 c5 17.dc5 Bc5 18.Ne5 Rd8 19.Bf3 Be8+=) 14...e5+= 15.d3 (15.Bb2 Bg4 (15...Ra8= 16.d4 ed4 17.Qd4 Bc5 18.Qe5 Be6 19.Qg3 Ba3=) 16.Qc2 Ra8 17.Rd1 Qe6 18.Ng5 Qd7 19.Bg4 Ng4=; 15.Re1 Rd8 16.Qc2 Bg4 17.Bb2 Bf3 18.Bf3 Ba3 19.Ba1 Bb4+=) 15...Ra8 (15...Bg4 16.d4 ed4 (16...Rd8 17.d5= Bc5 18.Qc2 Ra8 19.h3 Bh5=) 17.Qd4 Re8 18.h3 Bd7 19.Rc1 Ba3+=; 15...Rd8 16.Qc2 Bg4 17.Bb2 Bf3 18.Bf3 Ba3 19.Ba3 Qa3+=) 16.Qc2 (16.d4 ed4 17.Qd4 Re8 (17...Bc5= 18.Qd3 Be6 19.Qc2 Ng4+=) 18.Rc1 Bg4 19.h3 Bh5+=) 16...Ra5 (16...Bc5 17.Bb2 (17.Rc1+= Ra5 18.Bb2 h6 19.Nd1 Bd6+=) 17...Ng4 18.h3 Nf6 19.Rc1 Ra7=) 17.Rb1 (17.d4 ed4 18.Nd4 Bh2 19.Kh2 Qe5+=) 17...Bc5 (17...Bg4 18.Nd2+= (18.h3 Bf3 19.Bf3 Bc5+=) 18...Be2 19.Ne2 Qe8+=) 18.Nd1= Bd6 (18...Bb5 19.Be5 Bc6=) 19.Ne3 (19.Nc3 Bg4+=) 19...Rb5 20.Rb5 Bb5 21.Nf5 Qe8 22.Qb2 (22.Nd6 cd6 23.Qc7 Qc6 24.Qd8 Ne8–/+) 22...Na4–/+ 23.Qc2 (23.Qc1 h6 24.Bf1 Qe6–/+) 23...Bd7 24.Ne3 (24.Nd6 cd6 25.Qc7 Qc8 26.Qd6 Qc1 27.Bf1 Qa1 28.Qb8 Ne8 29.Ne5 Bb5–+) 24...b5 25.h3 c5 26.Bd1 g6 27.Qb1 Nb6 28.Qb2 Nh5 29.Ne5 f6? 30.Nd7+– Qd7 31.Bh5 Be5 32.Qa2 Kg7 33.Be5 fe5 34.Bg4 Qc7 35.Nd5 (35.Nd5 Nd5 36.ed5+–) 1–0. Bulcourf,Carlos (2165) – Ayala,Gustavo, LNA Copa Puma, Argentina ARG, 2007.

13.Bd4 c5 14.Be5 Be5 15.Ne5 Qc7 16.d4 Rc8 17.Na3 Nbd5 18.Qd3 cd4 19.Qd4 =.

13.Bd4 c6 14.Nc3 Nbd5 15.Qa1 Nc3 16.dc3 cb5 17.Rd1 Qc7 18.c4 Bc6 19.cb5 +=.

13.Bd4 Nbd5 14.Nc3 c5 15.Be5 Qb6 16.Bd6 Qd6 17.e4 Nc3 18.dc3 Qf4 19.e5 +=.

9.c4 c6

10.Qc2 0–0 11.Bf6 Qf6 12.d4 =.

10.Qc2 e5 11.Be2 (11.c5 Bc7=) 11...0–0 12.Nc3 (12.c5 Nc5 13.Be5 cb5 14.Bd6 Qd6=) 12...Re8 13.bc6 bc6 14.cd5 cd5 15.0–0 Nf8 (15...e4 16.Nd4=) 16.Nb5 Bb8 (16...Bg4 17.Rc1=) 17.Rc1 (17.d4 e4 18.Ne5 Bf5=) 17...Bg4 18.h3 Bf3 (18...Bh5 19.d3=) 19.Bf3 Ne6 20.Bb2 (20.Be2 Qd7=) 20...Ng5 21.Be2+= Nge4 22.d3 Nd6 23.d4 e4 24.Ba3 h5 25.Qc5 Re6 26.Na7 Ba7 27.Qa7+/– Nde8 28.Rb1 Rc6 29.Rb8 Rc8 30.Be7 Rb8 31.Bd8 Rd8 32.g4 hg4 33.hg4 g5 34.Qe7 Rd6 35.Qe5 Re6 36.Qg5 Kf8 37.Qf4 Ng8 38.Qb8 Kg7 39.Qd8 Nd6 40.Qg5 Rg6 41.Qd5 Nh6 42.Qe5 Kg8 43.Kf1 Kf8 44.g5 Nhf5 45.Qf4 Kg7 46.Bg4 Ne7 47.Qe5 Kf8 48.Qa5 f5 49.Qd8 Kf7 50.Bh5 (50…Ndc8 51.Qh8+–) 1–0. pcmvr (2870) – ostefrec (2405), net–chess.com, 2008.

10.Nc3 0–0 11.bc6 bc6 12.Nd4 Bb7 (12...Qb6 13.cd5 cd5 14.Qb3=+) 13.Be2 (13.cd5 cd5 14.Be2 Qa5=+) 13...Bb8 (13...dc4 14.Bc4 Ne5 15.Be2=+) 14.cd5= cd5 15.f4 (15.0–0 e5 16.Ndb5 Qe7=) 15...e5 16.fe5 Ne5 (16...Be5 17.0–0=) 17.0–0 Ne4 (17...Nc4 18.Nf5 Be5 19.d4=) 18.Qe1 (18.Qb3 Qc7 19.Ne4 de4+=) 18...Qd6 (18...g6 19.Qb1 Qc7 20.Ne4 de4 21.Rc1=) 19.Ne4 de4 20.Qh4 (20.Qg3 Bc8=) 20...Ng6 (20...g6 21.Rc1=) 21.Qh5 Ne7 (21...Ba6 22.Ba6 Qa6 23.Bc3=) 22.Bc3 Ba6 23.Ba6 Qa6 24.Nf5 (24.Rb1 Bd6=) 24...Nf5= 25.Qf5 Qg6 (25...g6 26.Qe4 Bh2 27.Kf2 Bg3 28.Kg1 Bh2 29.Kf2 Bg3 30.Kg1 Bh2=) 26.Qg6 hg6 27.Rb1 Re8 28.Kf2 g5 (28...f6 29.Rb5=) 29.h3 Kh7 30.Rb7 (30.Bd4 Kg6=) 30...Kg6 31.Rd7 Be5 32.Be5 Re5 33.g4 Kf6 34.Kg3 Ke6 35.Rd4 g6 36.h4 gh4 37.Kh4 f6 38.Kg3 g5 39.d3 ed3 40.Rd3 Ra5 41.Kf3 f5 42.Rb3 fg4 43.Kg4 Ke5 ½–½. Welling,Gerard (2390) – Slobodjan,Roman (2520), Bayern–chI Bank Hofmann 6th, 2002.

10.Nc3 0–0 11.Be2 Re8 12.Qc2 c5 13.g4 dc4 14.g5 Nd5 15.Ne4 Bf8 16.Rg1 b6 17.Ne5 Ne5 18.Be5 Nb4 19.Qc4 Qd5?? (better is 19...Bb7+=) 20.Nf6 (better is 20.Bg7!? Be7 21.Nf6 Bf6 22.gf6 (22.Bf6?! Bb7+–) 22...Qc4 23.Bh6 Kh8 24.Bc4+–) 20...gf6+/– 21.gf6 Kh8 22.Qg4 Nc2?? (22...Bh6 23.Qh5 Rg8 24.Rg8 Kg8+–) 23.Kf1+– Bh6 24.Qh5 Qd2 25.Qh6 (worse is 25.Qf7 Qe1 26.Kg2 Rg8 27.Qg8 Kg8 28.Re1 Ne1 29.Kf1 Nc2+=) 25...Qe1 26.Kg2 Rg8 27.Qg7! Rg7 28.fg7 Kg8 29.Re1 Ne1 30.Kg3 Bd7 31.Kg4 Nc2 (31...Be8+–) 32.Kg5 Na3? (32...c4+–) 33.Kf6 Bb5 (33...Be8 34.Ke7 f6 35.Bf6 Bg6+–) 34.Bh5 Be8 35.Ke7 f6 (35...Nb5+–) 36.Be8 (36.Ke8? fe5 37.Ke7 Kg7 38.Ke6 c4–+) 36...fe5 (36...Nc4 37.Bf6 Nd6 38.Kd6 c4 39.Ke6 h5 40.Bf7 Kh7 41.g8Q Kh6 42.Qg6) 37.Kf6 1–0. Steffens,Olaf (2285) – Elgersma,Simon (2095), Atlantis Open, 2015.

10.bc6 bc6=+ 11.Qa4 Qb6 12.Nc3 0–0 13.cd5 (13.d4 Bb4 14.Nd2 c5=+) 13...cd5=+ 14.Be2 Bb7 (14...Nc5 15.Qc2=+) 15.0–0= Ra8 16.Qh4 Ba6 (16...e5 17.Rc1=+) 17.Ba6 (17.d3 e5 18.Rb1 Qc6=+) 17...Qa6–/+ 18.Bb2 Qd3 19.Nd1 (19.Qd4 Nc5–/+) 19...e5 20.Bc3 h6 (20...Ra2 21.Qg3–/+) 21.Ne1 (21.Nb2 Qc2–/+) 21...Qb1 (21...Qe4 22.Qg3–/+) 22.Nf3 Qd3 (22...Qf5 23.Nb2–/+) 23.Ne1 Qe2 24.Nf3 Rc8 (better is 24...Ra2–/+) 25.Qa4? (better is 25.Qg3=+) 25...Qd3?? (better is 25...e4 26.Bf6 Nf6–+) 26.Ne1?? (26.Nb2 Nc5 27.Nd3 Na4 28.Be5 Be5 29.Nde5 Ne4+/–) 26...Qf5?? (better is 26...Qc4 27.Qc4 Rc4–/+) 27.Qa6+/– Rb8 28.Qd6+– Rb1 29.Nb2?? Ne4 30.Qd5+/– ½–½. Haralambof,Vladimir – Haygarth,Michael J, Tel Aviv, 1964.

10.bc6 bc6 11.cd5 ed5 12.Be2 0–0 13.0–0 Qc7 14.g3 (14.Qc2 Re8=) 14...Ne5 (14...Bb7!?+=) 15.Be5= Be5 16.Ne5 Qe5 17.f4 (17.Qc2!?=) 17...Qd6+= 18.Bf3 (18.Qc2 Bg4 19.Bg4 Ng4+=) 18...Bf5 19.g4 (19.Nc3 Ra8+=) 19...Bd3 (19...Ng4 20.Bg4 Qg6 21.Qf3–+) 20.Rf2 (20.Be2 Be2 21.Qe2 d4–/+) 20...d4 21.g5?? (better is 21.ed4 Qf4 22.Nc3 Qd4 23.Qa4–/+) 21...Rb8–+ 22.Qa4 Rb1 23.Kg2 Ne4 24.Be4 (24.Qd4 Qd4 25.ed4 Nf2 26.Kf2 Bb5–+) 24...Be4 25.Kg3 Rg1 26.Kh4 h6 27.Qd4 (27.Qa8 Kh7 28.Qe8–+) 27...hg5 28.fg5 Qe7 29.Kh3 Qe6 0–1. Illosvay,Istvan Tibor – Vince,Viola (1835), HUN–chT2 Asztalos, 2007.

10.d4= 0–0 11.c5 Be7 12.b6 Re8 13.Be2 Ne4 14.0–0 Bf6 (14...e5 15.Nbd2= (< 15.Ne5 Ne5 16.de5 Nc5–/+)) 15.Nbd2+= Nd2 16.Nd2 e5 17.Nb3 e4 18.Bc3 Nf8 (18...Bh4 19.Qd2+=) 19.Qc2 Ng6 20.Ra1 Qd7 21.h3 Be7 22.Ra7 Nf8 23.Na5 Ne6 24.Ba6 (24.Qb3 Rf8+/–) 24...Nd8 25.Qe2 Bf6 26.Qh5 Re7 27.g4 (27.Be2 g6 28.Qg4 Qg4 29.hg4 Be6+/–) 27...Qe6 (27...Qe8 28.Ra8 Qd7 29.Nb7 Nb7 30.g5 Bg5 31.Qg5+/–) 28.Be2 g6 29.Qh6 Bg7 30.Qf4 Rd7?? (better is 30...h5+/–) 31.Qb8+– Re7 32.Ba6! Re8 (32...ba6 33.Re7) 33.Nb7 Nb7 34.Bb7 (34.Rb7 Bb7 35.Qb7 Bf6+=) 34...Bd7? (better is 34...Bb7 35.Qb7 Bf6+–) 35.Qc7 Bf6 36.Ba6 Bc8 37.Bc8 Rc8 38.Qc8!! Qc8 39.b7 (39...Qb7 40.Rb7+–) 1–0. Merkl – Stummerer, corr SOK–87–11, 1989.

10.d4= Bb4 11.Bc3 Bc3 12.Nc3 c5 =.

10.d4= Bb4 11.Nbd2 Qa5 12.Bd3 dc4 13.Bc4 cb5 14.Bd3= 0–0 15.0–0. Geisensetter,Kurt – Woll, corr DDR M794, 1985.

10.d4= Bb4 11.Nbd2 Qa5 12.Bd3 dc4 13.Bc4 Ne4 14.Bb2 =+.

10.d4 Bb4 11.Nbd2 Qa5 12.Bd3 dc4 13.Bc4 Ne4 14.Ke2 Ndf6 (better is 14...Nd2!? 15.Nd2 cb5=) 15.Ne4+= Ne4 16.Bd3 f5 (16...Nf6 17.bc6 bc6 18.Qc2+=) 17.Qb3 0–0 18.Rb1 (18.Rc1 Bd2 19.Rb1 Bc3 20.Be4 Ba1+/–) 18...Bc3 (18...Bd6 19.Kf1+=) 19.Be4+/– fe4 20.Bc3 ef3 21.gf3 Qc7 22.Rg1 (22.bc6 Qc6 23.e4 Qc7+/–) 22...Rf7 (22...cb5 23.d5 g6 24.de6+=) 23.Bb2 (23.bc6 Qc6 24.e4 b6+/–) 23...Qh2= 24.Rg3 Qh5 25.b6 Bd7 (25...Qd5 26.Qd5 ed5 27.e4=) 26.Ba3 (26.Qa4 h6+=) 26...e5 (26...Qa5 27.Qb4 Qd5 28.e4 Qa2 29.Ke3+=) 27.Qa4+= h6 28.Qa8 Kh7 29.Qb7 e4 (29...ed4 30.Qa6 (30.ed4?? Qb5 31.Kd2 Qa5 32.Ke2 Qa3–+) 30...de3 31.Qd3 Bf5 32.Qe3–/+) 30.Qa6= Bc8 31.Qc4 Rf3 32.Rf3 Qf3 33.Ke1 h5 34.d5 Qh1? 35.Kd2+– Qb1 36.dc6 Qb6 37.Qe4 Kh6 38.Qf4 Kh7 39.Qe4?? Kh6 40.Qd5 Qb1 41.e4 h4 42.Qd6 Kh7 43.Qe5 Qa2 44.Bb2 Qf7 45.f4 h3 46.f5 Qf6 47.Ke2 Qh6= 48.Qh2 Ba6 49.Kf3 Qh5 50.Kg3 Qg5 ½–½. Kliavins,Janis – Randviir,Juri, Vilnius, 1955.

10.d4 dc4 11.bc6 Nb6 =.

10.Be2 0–0 11.d4 dc4 12.bc6 Nb6 =+.

10.Be2 0–0 11.h3 dc4=+ 12.Bc4 Nb6 (12...cb5 13.Bb5 e5 14.d3=+) 13.Be2 Bd7 (13...cb5 14.Bb5 Nbd5 15.Ne5=+) 14.bc6 (14.Be5 Be5 15.Ne5 cb5=+) 14...Bc6 15.0–0 Qc7 (15...Re8 16.d4=+) 16.Nc3 (16.Bf6 gf6 17.Qb3 Ra8=) 16...Nbd5 17.Nb5 Bb5 18.Bb5 Rc8 19.Qb1 Qc2 20.Bd3 Qb1 21.Rb1 Nb4 (21...Rc7=) 22.Bf6 (22.Bb5 Nfd5=) 22...gf6 (22...Nd3!? 23.Bc3 Rb8=+) 23.Bf1 Kf8 (23...Rc2 24.d4=) 24.g3 (24.d4 Rc2=) 24...Rc2 25.Be2 b6 26.Kf1 Ke8 27.Ke1 e5 28.Kd1 Rc8 29.Nh4 Bf8 30.Bg4 Rb8 31.Bf5+/– h6 32.Be4 Kd7 33.Nf5 Ke6 34.Nh6! Bh6 35.Rb4 f5 36.Bc2 Bf8 37.Ra4 Bd6 38.Bb3+– Kf6 39.Ra7 Be7 40.Ke2 e4 41.h4 b5 42.h5 Rh8+/– 43.Ra6 Kg7 44.Rb6 b4+= 45.h6 Rh6 46.Rh6 Kh6 47.Bf7 Kg5 48.d3 Kf6 49.Bg8 ed3 50.Kd3 Bd6 51.Ke2 Be5 52.Kf3 Bc3 53.g4 fg4 54.Kg4 Bd2 55.Kf4 Bc3 56.Ke4+/– Bd2 57.Bb3 Bc1 58.f4 Bb2 59.Kf3 Bc3 60.Ke4 Bb2 61.Kd3 Ba1 62.Kc2 Bc3 63.Ba2 Ba1 64.e4 Bc3 65.Bg8 Ba1 66.Kb3 Bc3 67.Kc2 Ba1 68.Bh7 Bc3 69.Kd3 Bb2 70.Bg8 Ba1 71.Kc4 Bc3 72.Kd3 Bb2 73.Ba2 Bc3 74.Bb3 Bb2 75.Kc4 Bc3 1–0. Saarenpaeae,Toivo – Ostrohov,Juri, Helsinki We HSK, 1996.

10.Be2 Qc7 11.0–0 e5!? 12.bc6 bc6 13.cd5 Nd5 =.

10.Be2 Qc7 11.0–0 Rg8 12.bc6+= (White is in command) 12...bc6 13.cd5 cd5 14.Nc3 Qc6 15.Bb5 Qc7 16.Bd3 Qc6 17.Nd4 Qb7 18.Ncb5 Bb8 19.Qc2 Ne5 20.Be2 (< 20.Bh7 Rh8 21.f4 Neg4+=) 20...Bd7 21.f4 Nc4 22.Rb1 Ke7 (22...Nb6!?+/–) 23.Bc4+– Rc8?? (better is 23...dc4 24.Qc4 Qd5 25.Qb4 Bd6 26.Nd6 Qd6 27.Qd6 Kd6+/–) 24.Nd6 Qb1 25.Qb1 Bd6 26.Bd3 Rb8 27.Qc2 Rc8 28.Bc3 h6 29.Ba6 Rb8 30.Nf3 Ne4 31.Bg7 f6 32.Bh6 Rh8 33.Bg7 Rh7 34.Bf6 Nf6 35.Ne5 Rh8 36.Ng6 (36...Ke8 37.Nh8+–) 1–0. pierred – chessmistress2003, Yahoo, 2005.

9.d4 0–0

10.c4 dc4 11.Bc4 Nb6 12.Bd3 Nfd5 13.0–0 Qe8 (13...Nb4 14.Be2=) 14.Nc3 f6 (14...Nb4 15.Be2=) 15.Ne4+= Be7 16.Nc5 Bd6 (16...Qh5 17.Qd2 Bd6 18.Bb2+=) 17.Qb3+= f5 (17...Nd7 18.Rc1+=) 18.Ne5 Qe7 19.Rc1 f4 (19...Rd8 20.Bb2+=) 20.e4+/– f3 21.g3 Qg5 22.Re1 (22.Rc2 Nf4+=) 22...Nf4 23.Bf1 Be5 24.de5 Qg4 25.Kh1 Ne2 26.Bb2 h5 27.Be2 fe2+= 28.Kg2 h4 29.f3 h3 30.Kf2 Kh7 31.Bd4 Rf7 32.Ke2+– Qh5 33.Rf1 Qg6 34.f4 Rf8 35.Rc1 Rd8+/– 36.Be3 Rf8 37.Kf2 (37...Kg8 38.Kg1+–; 37.Nd3 Qe4 38.Nf2 Qd5 39.Qc2 Kg8+–) 1–0. Borrmann,Fritz – Baer,Werner, TT–17 ETC, 2005.

10.c4 dc4 11.Bc4 Nd5 12.0–0 =.

10.Bd3 c5 11.bc6 bc6 12.c4 (12.0–0 Bb7 13.Nbd2 Qc7 14.c4 c5 15.Qc2 cd4 16.ed4; 12.Nbd2 c5 13.c4 cd4 14.ed4 dc4 15.Bc4 Bb7 16.0–0) 12...Ba6 (12...dc4 13.Bc4 Nb6 14.Bd3= (14.Be2 Nbd5 15.0–0 Qc7 16.g3) 14...Nbd5 15.Nbd2 Qa5 16.0–0) 13.c5 (13.Nbd2 Nb6 14.Qc2 Nc4 15.Nc4 dc4 16.Bc4) 13...Be7 14.0–0 Qa5 15.Bc3 Qa2 16.Ba6 Qa6 17.Qc2 Ne4 18.Nbd2 Nc3 ½–½. Baeckstroem,Mikael (2225) – Daatselaar,Jan Bart van (2175), corr ICCF WSTT/3/06/Final, 2009.

10.Bd3 c6 =.

10.Be2 c5 11.bc6 bc6 12.0–0 Qa5 13.Nbd2 Ba6 14.c4 Ra8 (14...Rb8 15.Qc2=) 15.h3 (15.Qc2 Nb6 16.Ne5 dc4 17.Ndc4 Nc4 18.Nc4 Qf5=) 15...h6 (15...Qa2!? 16.Qb1 Qa4+=) 16.Qc2= Nb6 17.Rc1 (17.Ne5 dc4 18.Ndc4 Nc4 19.Nc4 Bc4 20.Bc4 Nd5=) 17...Nfd7 (17...Nc4 18.Nc4 Bc4 19.Bc4 dc4 20.Nd2=) 18.Bb2 (18.Bc3 Qa4 19.c5 Be2 20.cd6 Qa3=) 18...Qa4 19.Kf1 Bb4 20.Bc3 Ba3 (20...Be7 21.Qa4 Na4 22.Ba1=) 21.Qa4 Na4 22.Ra1 Nc3 23.Ra3 Ne2 24.Ke2 dc4 25.Kd1 c5 26.Nc4 Bb7 27.Ra8 Ba8 28.dc5 Bf3 29.gf3 Nc5 30.Kc2 f6 31.Kc3 e5 32.Nd6 Kf8 33.Kc4 Ne6 34.Ne4 Ke7 35.Kd5 h5 ½–½. Recasens Sanchez,JA (2120) – Fenollar Jorda,M, AEAC W/X COPA/Pr–04, 2008.

10.Be2 Ne4 11.0–0 f5 12.c4 c6 (12...dc4 13.Nbd2 Nd2 14.Nd2 Qh4 15.f4 Nf6 16.Bc4 Re8 17.Nf3 Qh6+=; 12...Qf6 13.Nbd2 Nd2 14.Nd2 Qh6 15.h3 b6 16.Bc3 Bb7 17.Bf3 Nf6=) 13.Ne5 (13.c5 Be7 14.Nc3 e5 15.Qc2 ed4 16.ed4 Qc7 17.b6 Qb8+=) 13...Qc7 (13...Qa5 14.Bb2 Ne5 15.de5 Bb4 16.f3 Nc5 17.cd5 ed5=) 14.f4 (14.f3 Nef6 15.f4 c5 16.Nd2 Be7 17.Bb2 Ne4+=) 14...Qa5 (14...cb5 15.cb5 Bb4 16.Qb3 Ne5 17.fe5 Qa5=) 15.Bb2 (15.bc6 bc6 16.Bb2 Be5 17.fe5 Ba6=) 15...Ne5 16.fe5 Be7 17.Qb3 (17.bc6 bc6=) 17...Bg5 (17...Nd2 18.Nd2 Qd2 19.Bd3 Qe3 20.Kh1 dc4 21.Qc4 cb5 22.Qb5+=) 18.Ba3 Nd2 19.Nd2 Qd2 20.Bf8? (better is 20.Bd3 Qe3 21.Kh1 dc4 22.Bc4 Qb3 23.Bb3=) 20...Qe2–+ 21.Rb1 dc4 (21...Kf8?! 22.bc6 b6 23.cd5 Be3 24.Kh1=; 21...Qe3?! 22.Kf1 Qf4 23.Qf3 Qd4 24.Bd6 Qc4 25.Kg1 cb5 26.Qh5 Be3 27.Kh1–+; 21...Be3?! 22.Kh1 f4 23.Qb2 Qb2 24.Rb2 cb5 25.Bg7 bc4 26.Bh6 Bd4 27.Ra2–+) 22.Qa3 Qe3 (22...Be3?! 23.Kh1 Qd3 24.Qd3 cd3 25.Bc5–/+) 23.Qe3 Be3 24.Kf1 Kf8 25.Ke2 Bd4 26.bc6 b5 27.Rb5 Ke8 28.Kd2 (28.Kd1–+) 28...Kd8 29.g3 (29.Ra5 Kc7 30.Ra4 Be5 31.Rc4 Ba6–+) 29...Kc7 30.Rb4 c3 31.Kc2 Be5 32.Rc4 Bf6 33.Kb3 Ba6 34.Rc5 Bd3 35.Ra5 c2 (35...c2 36.Rc5 e5–+) 0–1. Mazurkiewicz,Marcin (2000) – Ben Nasser,K, 39th Olympiad Men, 2010.

9.d4 c5

10.c4 0–0–/+ 11.cd5 ed5 12.Nc3 Qa5 13.Nd2 (13.Qa4 Qa4 14.Na4 c4–/+) 13...Re8 14.Be2 cd4 15.ed4 (15.Nb3 Qa3 16.ed4 Nb6–/+) 15...Bb4 16.Qc1 Bc3 17.Qc3?? (better is 17.Bc3 Qb5 18.Qd1–+) 17...Qb5 18.Qf3 b6 (18...b6 19.Bc3 Ba6–+) 0–1. Frydendal,Odd (1910) – Pooley,Dr. Mark C (1970), corr WS/H/204 ICCF, 2009.

10.dc5 Nc5 11.Nbd2 0–0 12.c4 e5 13.Ne5 Nce4 14.Ne4 de4 15.Be2 Qe7 16.Ng4 Bb4 17.Kf1 Ng4 18.Bg4 Rd8 19.Bd4 Be6 20.g3 Bc4 21.Be2 Be6 22.Kg2 Bc3 23.Qa4 Bd4 24.ed4 h6 25.Rd1 Bd5 26.Kg1 Rc8 27.b6 Qe6 28.Qa3 Qb6 29.Bg4 Rc4 30.Qe3 Rb4 31.Kf1 Rb2 32.Be2 Qb4 33.Kg2 Qa4 34.Rc1 Qa2 35.Kf1 b5 36.Ke1 b4 37.Bd1 b3 38.Rc5 Be6 39.d5 Bd7 40.Rc1 Qa5 41.Qc3 e3 42.fe3 Qa2 (42...Qa2 43.Bb3 Rb3–+ (43...Qb3?! 44.Qb3 Rb3 45.Kf2–+)) 0–1. Nemec,Zdenek (2045) – Rosso,Pierandrea (2155), IECG, 2005.

10.dc5 Nc5 11.Be2 0–0 12.c4 b6 (12...Nce4 13.0–0 (13.Nbd2 Qa5 14.0–0 Nc3 15.Bc3 Qc3 16.cd5 ed5 17.Qb1 Bg4 18.Rc1=) 13...b6 14.cd5 Nd5 15.Qd4 Qf6 16.Ne5 Be5 17.Qe5 Qe5 18.Be5=) 13.cd5 (13.Bf6 Qf6 14.cd5 Rd8 15.Qd4 e5 16.Qc4 Qg6 17.0–0 e4 18.Ne1+=; 13.0–0 Bb7 14.Be5 Be5 15.Ne5 Qc7 16.Qd4 Rd8 17.Rd1 Nfe4 18.Nf3+=; 13.Bd4 Bb7 14.0–0 Qe7 15.Ne5 Rd8 16.Nd2 Be5 17.Be5 dc4 18.Qc2+=) 13...Nd5 14.Qd4 (14.0–0 Bb7 15.Qd4 f6 16.Qh4 f5 17.Qh3 Qd7 18.Bd4=) 14...f6 15.Nbd2 (15.Qh4 Bb7 16.0–0 f5 17.Qh3 Qd7 18.Bd4=) 15...Bb7 (15...Qd7 16.0–0 Rd8 17.Rd1 Bb7 18.Qh4=) 16.0–0 Qd7 17.Qg4 (17.Rd1 Rd8 18.Qh4=) 17...Ra8 18.Rd1 (18.Nc4=) 18...Ra4 19.Nc4 Qb5 20.Nd4 Qd7 (20...Rc4?! 21.Nb5 Rg4 22.Bg4+=) 21.Nd6 Qd6 22.Bb5 Ra2 23.Bf1 Ba6 24.Nb5 Qc6 25.e4 Bb5 26.ed5 ed5 27.Bb5 ½–½. Baumann,Walter (1965) – Haller,Philipp (2040), corr WS/H/217 ICCF, 2010.

10.dc5 Nc5 11.Be2 Nce4 =.

10.bc6 bc6

11.c4 Ba6 =.

11.c4 Bb4 12.Bc3 Qa5 13.Qb3 Bc3 14.Qc3 Qc3 15.Nc3 Ba6 16.c5 Bf1 17.Rf1 ½–½. Poschmann,Hans – Livesey,Nigel, Foster City, 1996.

11.Nbd2 0–0 12.c4=+ Ba6 13.Qa4 (13.Ne5 c5=+) 13...Qa8=+ 14.Qd1 (14.Bc3 Nb6 15.Qc2 Bc4 16.Bc4 Nc4 17.Nc4 dc4=) 14...Bb4–/+ 15.cd5 (15.Qc1 Ne4–/+) 15...cd5 16.Bb2 Ne4 17.Qa1 Bf1 18.Qa8 Ra8 19.Rf1 Ra2 20.Bc1 Nb6 (better is 20...Nc3 21.Rg1 Ra1–+) 21.Kd1 (21.Ke2 Nc4 22.Rd1–+) 21...Nc3 22.Ke1 Rc2 (23.Bb2 Rb2–+) 0–1. Van Der Lijn,Dirk – Crabbendam,H, Amsterdam, 1964.

11.Nbd2 c5 12.dc5 Nc5 13.c4 =+.

11.Be2 0–0 12.0–0 c5 13.dc5 (13.Nc3 A) 13...Bb7 14.Nb5 Be7 (14...Bb8 15.c4 dc4 16.Bc4 Nb6 17.Be2 c4 18.Qb1 Be4) 15.c4 Qb8 16.cd5 Bd5 17.Nc3 Bb7 18.Qc2 cd4; B) 13...c4 14.Qb1 (14.Nb5 Be7 15.Qb1 Ba6 16.Ne5 Ne5 17.de5 Ne4 18.Rd1 Qa5) 14...Ba6 15.Qa2 Qa8 16.Rb1 Bb7 17.Qa8 Ra8 18.Rb7 Ra1) 13...Nc5 14.c4 dc4 (14...Bb7 15.Nc3 Qe7 16.cd5 Nd5 17.Nb5 f6 18.Qc2 Rc8) 15.Bc4 (15.Na3 Bb7 16.Nc4 Be7 17.Bb2 Qd1 18.Rd1 Ra8) 15...Qe7 (15...Bb7 16.Bf6 gf6 17.Nc3 Bc7 18.Nb5 Qd1) 16.Qc2 (16.Bf6 gf6 17.Nc3 Bb7 18.Nb5 Bb8) 16...Bb7 17.Nbd2 h6 (17...Bc6 18.Bd4 Ra8) 18.Be5 (18.Rb1 Nfe4) 18...Be5 (18...Rd8+=) 19.Ne5 Nfe4 20.Ndf3 Nd6 21.Be2 Nce4 22.Rd1 Rc8 23.Qb2 Nc3 24.Re1 Ne2 25.Qe2 Rc3 26.Rd1 Be4 27.Nd3 Qc7 28.Nfe1 Bb7 29.Qb2 f6 30.Rc1 Rc1 31.Qc1 Qc1 32.Nc1 Ne4 33.f3 Nc3 34.e4 Kf7 35.h4 Ke7 36.Kf2 Kd6 37.Ke3 Ba6 38.Ncd3 e5 39.g3 Nb5 40.Nc2 Nc7 41.Ncb4 Bd3 42.Nd3 Ne6 43.f4 g6 44.Kf3 Nd4 45.Ke3 ½–½. Berlacki,Piotr (1840) – Oupindrin,Narayanin (2145), Syre Memorial op, 1996.

11.Be2 Qa5 12.Nbd2 Ba6 13.c4 Bc4 14.Bc4 dc4 15.0–0 Nb6 16.Qc2 0–0 17.Nc4 Nc4 18.Qc4 Qd5 19.Qc2 Ra8 20.Bb2 ½–½. Skerlik,Mgr.Stanislav (2330) – Galanov,Sergey Igorevich (2375), Slav Cup III, 2008.

9.Be2 0–0

10.0–0 c6 11.c4= cb5 12.cb5 e5 13.Qc2 =+.

10.0–0 c6 11.c4= Nb6 12.Qc2 (12.d3 cb5 13.cb5 Qe7=) 12...dc4 13.bc6 bc6 14.Ng5 e5 15.f4 Qe7?? (better is 15...Re8=) 16.fe5+– Be5 17.Rf6! g6 (17...Bf6 18.Qh7) 18.Be5 Qe5 19.Rc6 Bf5 (19...Qb5 20.Rd6+– (20.Bc4?! Nc4 21.Rc4 Ba6 22.Nh7 Qc4 23.Qc4 Bc4 24.Nf8 Kf8+–)) 20.e4 Bd7 (20...Rb8 21.Nc3 (21.Bc4?! Nc4 22.Rc4 Bd7+–) 21...Bg4 22.Bg4 Qg5 23.Be2+–) 21.Nf3 (21.Rb6?! Qd4 22.Kh1 Qb6 23.Bc4 Qf2+–) 21...Qb5 (21...Qb8 22.Rc5 Qa7 23.Kf1+– (23.Bc4?! Na4+/–)) 22.Rc7 Ra8 23.Bc4 Nc4 24.Rc4 Ra1 25.Rc8 Be8 26.Kf2 Kf8 27.Nc3 Rf1 28.Kg3 Qd7 29.Nd5 Qd6 30.Nf4 g5 31.Re8?? Ke8+= 32.Qc8 Ke7 33.Qb7 Kf8= 34.Qc8 Kg7 35.Qc3 f6 36.e5 gf4=+ 37.Kf4 fe5 38.Qe5 Qe5 39.Ke5 Rf2 40.d4 Rg2 41.d5 Rf2 (42.Ke4 Kf6=+). De Visser,Arno – Duinmaijer, 1995.

10.0–0 e5 11.c4 e4 12.Nd4 1–0. Van Esbroeck,Dirk – Andreani,Carlo, SF–2009–0–00041, 2009.

10.0–0 e5 11.d3 =+.

10.0–0 Re8 11.d4= Nb6 12.Nbd2 =.

10.0–0 Re8 11.d4= e5 12.c4 ed4 13.Bd4 dc4 14.Nbd2 Ne5 (14...c3 15.Bc3 Nd5 16.Bd4=) 15.Be5 Be5 16.Nc4 (16.Ne5 Re5 17.Bc4 Bg4=) 16...Qd1 17.Rd1 Bc3 (18.Nd4 Bd7=). Monin – Faibisovich, Leningrad, 1985.

10.0–0 Re8 11.d4= e5 12.c4 e4 13.Nfd2 =.

10.0–0 Re8 11.d4= e5 12.de5 Ne5 13.Be5 Be5 14.Ne5 Re5 =.

9.Be2 e5

10.d3 0–0 11.Nbd2 Qe7 12.0–0 Rd8 13.Bb2 Nb6 (13...h6 14.Qa1+=) 14.c4 dc4 15.Nc4 Nc4 16.dc4 e4 17.Nd4 h5 18.Qc2 (18.Bh5? Qe5 19.Bf7 Kf7–+) 18...Ng4 19.h3 Qh4 20.c5 Bh2 21.Kh1 Be5 22.Kg1 Bh2 23.Kh1 Be5 24.Kg1 Bh2 25.Kh1 ½–½. Boehnke,Hartmut (2085) – Dumitrescu,Florian (2080), corr WS/H/170 ICCF, 2009.

10.0–0 0–0

11.Bb2 Qe7 12.Nc3 Nb6 13.d3 Rd8 14.Qd2 Bb4 15.Qc1 Bd7 16.d4 e4 17.Ne5 Be6 18.f3 ef3 19.Bf3 Ra8 20.Qd1 Nfd7 21.Nd3 f5 22.Qe2 Nf6 23.Qe1 Bd7 24.Qf2 Bc3 25.Bc3 Bb5 26.Rb1 c6 27.Bb4 Qe6 28.Ne5 (28.Nc5!? Qf7 29.Bd1–/+) 28...Nc4–+ 29.Bc3 Qe7 30.Qg3 Ra2 31.Bb4 Qe8 32.Nc4 Bc4 33.Qe5 Qe5 (worse is 33...Rc2 34.Be7 Ne4 35.Qe6 Kh8 36.Qf5–/+) 34.de5 Ne8 35.g4 g6 36.gf5 gf5 37.e6 d4 ½–½. Trokenheim,Marek (1765) – Ortiz,Manuel (2040), OP–2012–0–02058, 2012.

11.d3 Qe7 12.Nbd2 Rd8 13.Ng5 Nb6 14.Bb2 Bd7 15.d4 (15.c4 dc4 16.Nc4 Bb5 17.Nb6 cb6=+) 15...e4–/+ 16.Qa1? (better is 16.c4!? dc4 17.Qc2–/+) 16...Ng4 –+.

11.d4 e4 12.Nfd2 Re8 (12...c6 13.c4=+) 13.c4= dc4 (13...c5 14.dc5 Nc5 15.Bd4=) 14.Nc4 Nb6 (14...Bb4 15.Bc3 Bf8 16.f3=) 15.Nb6 cb6 16.Nc3 Qc7 (16...Bf5 17.Qd2=) 17.h3 Be6 18.Qb1 Bf5 19.Rd1 Ra8 (19...Qd7 20.Bc4=) 20.Bb2 +=.

11.d4 e4 12.Ne5 Qe7 13.Nd7 Bd7 14.Nc3 (14.c4 dc4 15.Nc3 Be6=+) 14...Ra8–/+ 15.Bb2 Bf5 16.Qd2 c6 17.bc6 bc6 18.Rb1 Bc7 19.h3? (better is 19.f4!?–/+) 19...Qd6 –+.

8.f4 c5

9.Nf3 Bd6 10.Bd3 Qa5 11.Bc3 Qc7 12.0–0 0–0 13.Qe1 b6 14.Bb2 Bb7 15.Qg3 Ra8 16.Ne5 g6 17.Nd7 Nd7 18.Nc3 Bf8 19.Ra1 Ra1 20.Ba1 Bg7 21.Bb2 c4 22.Bf1 Qd6 23.Qh4 Bf6 24.Ne4 de4 (worse is 24...Bh4 25.Nd6 Ba8 26.Bd4+=) 25.Bf6 Nf6 26.Qf6 Qd2 27.Qd4 Qd4 28.ed4 c3 0–1. Rooijen Van,Peter (1655) – Svajdler,Frantisek (2175), 8. LSS No Engine Cup Final, 2010.

9.Nf3 Bd6 10.Be2 Qc7 11.0–0 0–0 12.d3 e5 13.fe5 Ne5 14.Nbd2? (better is 14.b6 Qb8 15.Be5 Be5 16.Qd2+=) 14...Neg4–+ 15.Bf6 Nf6 (15...Ne3 16.Qa1 Nf1 17.Kf1 gf6 18.Qf6–+) 16.h3 Re8 17.e4 Bf4 18.c4? (18.Re1 Be3 (18...de4 19.de4 Be3 20.Kh1–+) 19.Kh1 Nh5–+) 18...de4 (better is 18...Be3!? 19.Kh1 Nh5 20.g4 Ng3 21.Kg2 de4 22.de4 Nf1 23.Nf1–+) 19.Ne4 Ne4 (19...Be3!? 20.Kh1 Re4 21.de4 Ne4 22.g4–+) 20.de4–/+ Re4 21.Bd3 Re3 22.Qc2 g6 23.Be4 Qe7 24.Bd5 Bf5 25.Qa2 Be4 26.Qa8 Kg7 27.Qa1 f6 28.Rd1 (better is 28.Kh1–/+) 28...Bf3–+ 29.Bf3 Rf3! 30.gf3 (30.gf3 Qe2 Double attack (30...Qe2 Decoy)) 30...Qe3 31.Kg2 (31.Kf1 Qf3 32.Kg1 Be3 33.Kh2–+) 31...Qe2 32.Kg1 Be3 (32...Kh6!? 33.Rb1 Be3 34.Kh1 Qf3 35.Kh2 Qe2 36.Kh1–+) 33.Kh1 Qf3 34.Kh2 Bf4 (34...Kh6 35.Rd8 Bf2 36.Qc1 g5 37.Qf1 Bg3 38.Kg1 Bh2 39.Kh2 Qf1 40.Rf8–+) 35.Kg1 Qg3 (worse is 35...Qh3 36.Kf2 Be5 37.Qa4 Bd4 38.Rd4 cd4 39.Qa8 Qe3 40.Kf1 Qf3 41.Ke1–+) 36.Kf1 Qh3 37.Kf2 Qe3 38.Kg2 (38.Kf1 Qf3 39.Ke1–+) 38...Qe2 39.Kg1 Bh2 (39...Be3 40.Kh1 Qh5 41.Kg2 Qg4 42.Kh2 Bf4 43.Kh1 Qh3 44.Kg1 Be3) 40.Kh1–+ Be5 (40...Qc4?! 41.Rd7 Kh6 42.Qf6+=) 41.Rd7 Kh6 42.Qc1 g5 43.Rd2 Qf3 (43...Qe4 44.Kg1 Bf4 45.Rh2 Kg6 46.Qd1 Qd4 47.Qd4 Bh2 48.Kh2 cd4 49.c5–+) 44.Kg1 Bf4 45.Rh2 Kg7 46.Rh7 Kh7 47.Qb1 (47.Qc2 Kh6 48.Qg2 Qd1 49.Kf2–+) 47...Kg7 48.b6 g4 (48...Be3 49.Kh2 Qf4 50.Kh1 Qh4 51.Kg2 g4 52.Qh7 Kh7 53.Kf1 Qf2) 49.Qg6= ½–½. Jaramillo,Carlos Orlando (1915) – Rodriguez,Jorge Ivan (1820), Manizales COL, 2014.

7.Ba1 Be7

8.f4 c5 9.Nf3 0–0 10.Be2 Ne4 11.0–0 Nd7 12.d3 Nd6 13.c4 Nf5 14.Qc1 Bf6 15.Bf6 Qf6 (worse is 15...gf6 16.cd5 ed5 17.e4+=) 16.g4 (16.cd5 ed5 17.e4 Nd4=) 16...Nh4 (better is 16...Qg6!? 17.g5 b6+=) 17.g5+= Nf3 18.Bf3 Qg6 19.cd5 ed5 20.Bd5 Qd3 21.Bc4 (21.Nc3!?=) 21...Qe4+= 22.Re1 b6 (22...Nb6 23.Nd2 Qe7 24.Bd3=) 23.Nd2= Qf5 24.Nf1 Re8 25.Ng3 Qg4 26.Be2 Qh3 27.Bf3 Nf8 28.Qc3 Ng6 29.Bc6 Rd8 30.Bg2 Qg4 31.Rf1 Nh4 32.Be4 Rd6 (32...Bf5 33.Qe5 Be4 34.Qe4+=) 33.Qc2 (33.Qe5 Qe6=) 33...h6 (33...g6 34.Qa2+=) 34.gh6= gh6 35.Kh1 Qh3 (35...Bd7 36.Ra1+=) 36.Rg1 Kf8 37.Qc3 Qe6?? (better is 37...f6=) 38.Qh8+– Ke7 39.f5 Qd7 40.Qe5 Kd8 41.Nh5 (better is 41.Qf4 Qe7 42.Rf1+–) 41...Rd1? (better is 41...Bb7 42.Bb7 Qb7 43.e4 Qe7+–) 42.Qf6 Kc7 43.Qh4 Rg1 44.Kg1 Qd1 45.Kf2 Qd2 46.Kf3 Qd1 47.Kf4 Qf1 48.Bf3 Qb5 49.Kg3 Qd7 50.Qf4 Qd6 51.Nf6 Qf4 52.Kf4 b5 53.Bd5 Kd6 54.Bf7 Ke7 55.Be8 Kf6+= 56.e4 b4 57.e5 Ke7 58.Bb5 b3 59.f6 Kf7+= 60.Ba4? b2 61.Bc2+= Be6 ½–½. Matveenko,Yury (2150) – Skoriak,Ivan (1950), Seniors Russian Championship Men, 2011.

8.f4 c6 9.Nf3 0–0 10.Nc3 Qa5 11.Be2 cb5 12.Bb5 Bb4 (12...Bd7 13.Bd7 Nbd7 14.0–0=) 13.Bd3 Nbd7 14.0–0 Nc5 15.Be2 (15.Bb2 Nfe4=) 15...Rd8 16.Nb5 Nfe4 (16...Bd7 17.Bf6 gf6 18.Nbd4=) 17.c3 Ba3 18.Na3 Qa3 19.Qc2 Bd7 20.d3 Nd6 21.Nd4 Qa5 22.Bb2 Ba4 23.Qd2 Nb5 24.h3 (24.Rf3 f6+=) 24...Ra8= 25.Kh2 Nd4 26.ed4 Nb3 27.Qe3 Bd7 28.Bd1 Qb6 29.Bc2 (29.Rf2 h6=) 29...Ra2 30.Rb1 h6 31.Bd1 Na5 32.Qd2 Be8 (32...e5 33.fe5 Bf5=) 33.Bh5 Ba4 34.Kh1 (34.Kg3 Qc7=) 34...g6+= 35.Bf3 Nb3 36.Qe2 Kh7 37.Kh2 (37.Kg1 Qc7 38.Qe3 b5+=) 37...Qc7+= 38.Qe3 (38.Kg3 g5 39.Kf2 Nd4 40.cd4 Bc2–/+) 38...g5–/+ 39.Kg3? (better is 39.Bd1!?–/+) 39...b5–+ 40.Kh2 (40.Bc1 Rc2 41.Ba3 Nd2–+) 40...b4 41.c4 (41.cb4 Qc2 42.Be4 de4 43.Qe4 Kg8 44.Qa8 Kg7 45.d5 Rb2 46.Rb2 Qb2 47.de6–+) 41...Qf4 (41...gf4?! 42.Qe1 Qd6 43.cd5 ed5 44.Kh1–/+) 42.Qf4 gf4 43.Kg1 (43.Bc1 Nc1 (43...Nd4?! 44.Rb2 b3 45.cd5–+) 44.cd5 b3 45.de6 fe6 46.Rc1 b2 47.Rc7 Kg6 48.Be4 Kf6–+) 43...Be8 44.Bc1 (44.cd5 Nd2 45.Re1 Nf3 46.gf3 Rb2–+) 44...Nc1 45.Rc1 (45.Rb4 Nd3 46.Rb8 Bc6–+) 45...b3 46.Rb1 b2 47.Bd1 Ra1 48.Bc2 Ba4 49.Kh2 Bc2 50.Rb2 Bd3 51.c5 f6 52.c6 Rc1 53.Rb7 Kg6 54.c7 Be4 55.Ra7 Rc2 56.Kg1 Rg2 57.Kf1 Rc2 58.Ke1 f3 59.Ra3 Kg5 (59...Kg5 60.h4 Kh4–+) 0–1. pman3660 (2045) – mcjim (2060), gameknot.com, 2014.

8.f4 Nbd7 9.Nf3 c6 10.Be2 Nb6 11.0–0 0–0 12.bc6 bc6 13.Qe1 Bd7 14.d3 Bc5 15.Nd4 Qa8 16.Nd2 Qa5 17.N4b3 Be3 18.Kh1 Qb4 19.Bf6 Bd2 20.Qg3 (20.Nd2?! gf6 21.Qg3 Kh8=) 20...g6 21.Qh4 (21.Nd2?! Qd2 22.Bd1 Bc8=) 21...Bc3 22.Be7 Qa4?? (better is 22...Qb5 23.Bf8 Kf8 24.Qh7 Qa4+/–) 23.Bf8+– Kf8 24.Qd8 Kg7 25.Qb6 Qa8 26.d4 Qf8 27.Qc7 Be8 28.Qe5 Kg8 29.Qe3 Bb4 30.c4 dc4 (30...Bd7 31.Nc5 Qd8 32.Nd3+–) 31.Bc4 Bd6 32.Nc5 Bc5 33.dc5 h6 34.Ra1 Kh7 (34...Qe7 35.Ra8+–) 35.Ra8 (35.Ra7!? Kg8+–) 35...Qh8 (35...Qe7 36.Qe5+–) 36.Be6! 1–0. Braak,Jelle van den (1905) – Machado,Fausto A (1940), Netherlands – Portugal, 2005.

8.c4 0–0

9.Nf3 Bd7 10.Be2 c6 11.Nc3 Qb6 12.bc6 Nc6 13.cd5 Nd5 14.Nd5 ed5 15.0–0 Bg4 16.Nd4 Be2 17.Ne2 Rd8 18.Nd4 Nd4 19.Bd4 Bc5 20.Bc5 Qc5 21.d4 Qc4 22.h3 Rc8 23.Qb1 b5 24.Qb2 g6 25.Rb1 Rb8 26.Qb4 (26.Rc1 Qa4+=) 26...Kg7 (26...Qb4!? 27.Rb4 f5=) 27.g3 (27.Qd6!? Rb7 28.g4+=) 27…h5 ½–½. mr5reasons1 (1735) – leonard55 (1680), gameknot.com, 2012.

9.Nf3 Ne4 10.Be2 f6 11.0–0 c5 (11...dc4 12.Bc4 Nd6 13.Bd3=) 12.Qb3 Kh8 13.Rd1 dc4 14.Bc4 Qb6 15.d4 Rd8 16.Bd3 Nd6 17.Nc3 cd4 18.ed4 Nf5 1–0. Danek,Vaclav (1990) – Soukal,Roman (1915), CZE–chT2a, 2007.

8.Nf3 0–0

9.c4 dc4 10.Bc4 c6 11.0–0 cb5 12.Bb5 Nc6 (12...Bd7 13.Be2=) 13.Qc2 (13.Bf6 Bf6 14.d4 Bd7+=) 13...Bd7 (13...Nb4 14.Qa4=) 14.Qb2 (14.Bf6 Bf6 15.d4 Qa5=) 14...Qb8 (14...Nb4 15.Be2=) 15.Nc3 (15.d3=) 15...Ne5 (15...e5!?=) 16.Ne5+/– Qe5 17.Bd7 Nd7 18.f4 (better is 18.Qb7 Rd8 19.Ne4+/–) 18...Qc7?? (better is 18...Qb8+=) 19.Nb5 Bf6 20.Nc7 (20...Bb2 21.Bb2+–) 1–0. AbstractPoetic – Rajko, internet, 2007.

9.c4 dc4 10.Bc4 Nd5 11.0–0 Nd7 12.Nc3 N7b6 13.Nd5 Nc4 14.Ne7 Qe7 15.Qb3 Nd6 16.Rc1 Bd7 Attacks the isolani on b5 (16...f6 17.d3+=) 17.Rc7+/– Nb5?? (better is 17...Qd8 18.Rc5 b6+=) 18.Qb5!! Qa3 (18...Bb5 19.Re7 Pinning (19.Re7 Deflection)) 19.Qb1 Bc6 (19...Rc8 20.Bb2 Qa4 21.Rb7+–) 20.Ng5 g6 21.Be5 Qa5 22.d4 Qd5 23.f3 h6 (23...Qa5+–) 24.Rf7! Rf7 (24...Rf7 25.Qg6 Mate attack) 25.Qg6 Kf8 (25...Rg7 26.Qg7) 26.Qf7 1–0. Janek – Kevin, internet free game, 2016.

9.c4 dc4 10.Bc4 Bd6 11.0–0 =.

9.d4 c5 10.dc5 Ne4 11.Nbd2 Qa5 12.Be2 Bd7 13.0–0 Bb5 14.Bb5 Qb5 (14...Nd2!? 15.Nd2 Qb5=) 15.Ne4+= de4 16.Qd4 Bf6 (16...f6 17.Qe4 Qc6 18.Qg4 Bc5 19.Bd4=) 17.Qe4+/– Ba1 18.Ra1 (18.Ng5 g6 19.Qh4 h5 20.Ra1 Qc5+=) 18...Qc5 19.Qb7 Qc2 20.h3 Qc6 (20...Nc6 21.Ra6 Nb8 22.Rd6=) 21.Ra7+= Qb7 22.Rb7 Nc6 ½–½. Sokolski,Alexey – Geller,Efim, Soviet Union, 1957.

9.d4 c6 10.bc6 Nc6 11.Be2 b5 (11...Qc7 12.0–0=+) 12.0–0 (12.Bb5? Qa5 13.Nc3 Ne4–+) 12...Ba6 13.Nbd2 (13.Qd3 Qa5 14.Nbd2 Ra8=+) 13...Qc7 14.c3 Na5 (14...Ra8 15.Bb2=+) 15.Bb2 (15.Bd3 Nc4=+) 15...Ra8 16.Qc2 Nc4 (16...Bd6 17.Bd3=+) 17.Ra1 Bb7 (< 17...Nb2 18.Bb5 Bb4 19.Nb1=) 18.Ra8 Ba8 19.Nc4 (19.Bc4 bc4 20.Ba3 Ba3=+) 19...dc4 20.Nd2 (20.Qc1 Ng4 21.h3 Bf3 22.Bf3 Qh2 23.Kf1 Nf6=) 20...e5 (20...Bd6 21.h3=+) 21.Qf5 Qc6 22.Bf3 e4 23.Be2 Bd6 24.f3 Qe8 25.fe4 Ne4 26.Ne4 Be4 27.Qf1 Qe6 28.Bc1 Qh6 29.g3 Qg6 30.Qf2 h5 31.Bd2 h4 32.g4 h3 33.Be1 Qe6 34.Bd2 g5 35.Be1 f5 36.gf5 Bf5 37.Bd2 g4 38.Qh4 Qe4 39.Bf1 Kf7 40.Qf2 Ke7–/+ 41.d5? Qd5–+ 42.Be1 Qe4 43.Qd2 Bc5 (44.Bh4 Kf7–+) 0–1. woudstra (2740) – zoltanln (2830), net–chess.com, 2006.

9.Bd4 c5 10.bc6 Nc6 =+.

9.Be2 Qd6 10.0–0 Nbd7 11.Bb2 c5 12.c4 b6 13.cd5 Qd5 14.d3 Bb7 15.Nbd2 Qf5 16.Nc4 Ra8 17.e4 Qf4 18.Nfe5 Qh4 19.f4 Ne5 20.fe5 Nd7 21.Bh5 Rf8 22.g3 (22.g3 Qh3 23.Rf4+–) 1–0. Pcmvr (2175) – Zmaster (1955), playchess.de, 2006.

9.Be2 Qd6 10.Be5 Qb6 11.Bd4 Qa5 12.0–0 Nbd7 13.Bc3 Qa4 14.Ne5 Ne4 15.Bd4 Bb4 16.d3 Nd6 17.Nd7 Bd7 18.c3 Qd1 19.Rd1 Ba5 20.c4 Ra8 21.Bf3 Rd8 22.Na3 (< 22.cd5 Nb5 23.de6 Nd4 24.ef7 Kf7 25.ed4 Bc8=) 22...Nf5 23.Bb2 Nh4 24.Be2 Ra8 25.Nc2 Rf8 26.Ra1 Bb6 27.Bd4 Bd4 28.ed4 Ng6 29.Ra7 Rb8 30.Bf3 Ne7 31.Ra5 Kf8 32.Kf1 Nc8 33.Ke2 Nd6 34.Ne3 Re8 35.Ra7 Rb8 36.Kd2 Be8 37.Ra5 f5 38.Kc3 f4 39.Ng4 Kg8 (39...Ke7!?+/–) 40.Ne5 h5 41.h3 Rd8 42.g3 Nc8 (Better is 42...dc4!? 43.dc4 Nf5+/–) 43.Ra8+– fg3 44.fg3 c6 45.b6! h4 46.Bg4 hg3 47.Be6 Kf8 48.Bc8 g2 49.Nf3 Ke7 50.Bb7 dc4 51.Rd8 Kd8 52.dc4 Ke7 53.c5 Kd8 54.d5 cd5 55.Bd5 Bb5 56.c6 Ba4 57.Ng1 1–0. b4_player (2230) – THE_MONK (2025), GameColony.com, 2003.

9.Be2 Bd6 =.

9.Ne5 Nbd7 10.d4 Ne4 11.f3 Nd6 12.Bd3 f6 13.Ng4 c6 14.0–0 (14.bc6 bc6 15.0–0 c5=+) 14...Qb6 (14...Nb5 15.c4 Nc7 16.c5=+) 15.f4 (15.bc6 bc6 16.Nd2 Ba6=) 15...f5 (15...c5 16.dc5 Nc5 17.Nc3–/+) 16.Ne5 (16.bc6 Qc6 17.Ne5 Ne5 18.fe5 Nc4=+) 16...Nb5 17.Nc3 (17.c4 dc4 18.Nc4 Qa6=+) 17...Nc3–/+ 18.Bc3 Ne5 19.fe5 Bd7 20.Qh5 Be8 21.Qh3 c5 22.Be2 (22.Ra1 Bg6–/+) 22...Bg6 (22...Ba4 23.Bd1–+) 23.Qg3 (23.Ra1 f4 24.Bd3 Bd3 25.cd3 fe3 26.Qe3 Qb3–+) 23...Qd8 24.Rb1 Qc7 25.Qe1 b6 26.Qc1 cd4 27.Bd4 Bc5 28.Qb2 f4–+ 29.Bd3? Bd3 30.cd3 fe3 31.Bc5 bc5 32.Rf1 Rf1 33.Kf1 d4 34.Qa2 Qe5 35.Qa8 Kf7 36.Kg1 Qf5 37.Qb7 Kg6 38.Qb1 Qf2 39.Kh1 0–1. Stefanova,Milena (2035) – Tsvetkova,Svetlana (1980), Pleven BUL, Women Ch (qualifier), 2006.

9.c4 c5

10.Qa4 Nbd7 11.Be2 Nb6 12.Qa2 Nc4 13.Bc4 dc4 14.Qc4 b6 15.d4 Bb7 16.dc5 bc5 17.Nbd2 Bd5 18.Qc3 (18.Qe2 Bf3 19.gf3 Qa5 20.Bf6 Bf6–/+) 18...Qb6 (18...Qd7!? 19.e4 Ba8–/+) 19.e4+= Ba8 20.Qc4 Rb8 21.Be5 Rc8 22.0–0 Nd7 23.Bd4?? (better is 23.Bb2+=) 23...Rb8–/+ 24.Ne5 Nf6 (better is 24...Qb5 25.Nd7 Qd7–/+) 25.Nc6?? The isolani on c5 becomes a target (better is 25.Be3 Qb5 26.f3+=) 25...Bc6–+ (25...cd4?! 26.Ne7 Kf8 27.Nc6 Bc6 28.bc6=) 26.bc6 cd4 27.c7 (27.h3 Rc8 28.Rc1 Bd6–+) 27...Rc8 0–1. Schroeder,Ralf (1670) – Federau,J (2120), Lichtenberger Sommer, 2015.

10.Qb3 b6 11.d3 Nbd7 =.

10.Qb3 b6 11.Be2 Bb7 12.d3 d4 (12...Nbd7 13.0–0=) 13.0–0 (13.ed4 cd4 14.Qb2 Bc5=) 13...de3 14.fe3 Nbd7 15.Nbd2 Qc7 16.e4 (16.Qc3 Rd8=) 16...e5 (16...Ng4 17.h3 Ne3 18.Rf2=+) 17.Qc3 Bd6 (17...Ra8 18.Bb2=) 18.Nh4 Re8 (18...Ra8 19.Nf5=) 19.Nf5+= Nf8 (19...Ra8 20.Bb2=) 20.Nd6 (20.Bb2!?+=) 20...Qd6= 21.Nf3 (21.Bb2 Ng6=) 21...Ng6 22.Qe1 (22.Bd1 Bc8=) 22...Nd7 (22...Nf4 23.Ne5 Ne2 24.Qe2 Re5 25.Be5 Qe5 26.Qf2=+) 23.Nh4= Ndf8 (23...Nh4 24.Qh4 Ra8 25.Bc3=) 24.Qg3 (24.Nf5 Qc7+=) 24...f6 (24...Nh4 25.Qh4 Ng6 26.Qg4=) 25.Nf5+= Qd8 (25...Qd7 26.Qe3=) 26.h4 Ne6= 27.Bh5 Nef4–/+ 28.Bf3 Bc8 29.h5 Bf5 30.ef5 Qd3 31.Bd5 Qd5! 32.Qg6 hg6 33.cd5 gh5 34.Rd1 Rd8 35.Kf2 Rd5 36.Rd5 Nd5 37.Kf3 Nc7 38.Ke4 Nb5 39.Kd5 Nd4 40.Bc3 Nf5 41.Kc6 e4 42.Kb6 Nh4 43.Kc5 Ng2 44.Kd4 e3 45.Kd3 h4 46.Ke2 h3 47.Kf3 f5 48.Kg3 e2 (49.Kh3 e1Q 50.Be1 Ne1–+; better is 48...Nf4! 49.Kh2–+) 0–1. Holz auf der Heide – Resnjanskij, Leipzig, 1996.

10.Be2 dc4 11.Bc4 Nbd7 =.

9.c4 c6

10.Qa4 dc4 11.Bc4 Nd5 12.Qa7 Nd7 13.bc6 bc6 14.0–0 Bc5 15.Qa2 Be7 16.Nc3 Bf6 17.Rc1 Nc3 18.Bc3 Bc3 19.Rc3 Qf6 20.Be2 e5 21.d4 ed4 22.Nd4 c6 gets attention 22...c5 23.Nb5 Bb7 24.Rc1 Qg6 25.Bf1 Rc8 26.Qd2 Bc6 27.Na7 Ra8 28.Nc6 Qc6 29.Qc3 g6 30.g3 Rc8 31.Bh3 Rc7 32.Rd1 Nf8 33.Rd8 Rb7 34.Qc1 Rc7 35.Qc3 Rb7 36.Rd1 Qb6 37.Bg2 Rc7 38.Bd5 1–0. Krafzik,Joachim (1835) – Wojtkowiak,Horst (1675), GER–ch Seniors–A, 2008.

10.Nc3 Qa5 11.Qb1 Nbd7 (11...Rd8 12.cd5 ed5 13.Bd3=) 12.Be2 Nb6 13.bc6 bc6 14.Nd4 (14.Ne5 Bb7=) 14...Bd7=+ (14...dc4?? 15.Nc6 Qa3 16.Ne7 Qe7 17.Qb6+–) 15.Nb3 Qa7 16.cd5 cd5 17.0–0 Rc8 18.h3 Nc4 19.d3 Nd6 20.Rc1 Rb8 (20...Nf5 21.Nd1=+) 21.Bd1 (21.Qc2 Nf5 22.d4 Bd6=) 21...Nf5 (21...d4 22.Qa2 Qa2 23.Na2 de3 24.fe3=+) 22.Ne2 Ne8 23.e4 (White launches an attack) 23...de4 (23...Nfd6 24.ed5 ed5 25.Bd4=) 24.de4 Nh4 25.Bd4 Qa3 26.Qd3 Bb5 27.Qg3 Be2?? (better is 27...Rd8 28.Rb1 Qd6+=) 28.Qb8+– Kf8 (28...Bb5 29.Qb5 Qa8+–) 29.Rc8 Qa4 30.Re8! Qe8 31.Bg7! (31...Kg7 32.Qe8 Nf3 33.gf3 Bd1 34.Qe7 Bb3 35.Qg5 Kf8 36.Qc5 Kg8 37.Qc8 Kg7 38.Qc3 Kf8 39.Qb3+–) 1–0. Papapostolou,Christos – Fassmann,Kurt, 3sen.WttgEM/Ellwangen, 1991.

10.Nc3 Qa5 11.Be2 dc4 12.bc6 (12.Bc4 Bd7 13.Qb1 cb5 14.Bb5 Bc6=) 12...b5+= 13.Ne5 (13.Nd4!? b4 14.Ncb5+=) 13...Ba6–/+ 14.f4 (14.Bf3 Bd6 15.d4 Nd5 16.Bd5 ed5–+) 14...b4 15.Qa4 (15.0–0 bc3 16.Bc3 Qc5–+) 15...Qb6 (15...Qc5 16.Nd1 Bb5 17.Qc2 Nc6 18.Nc4–+) 16.Nd1–/+ (16.Bc4? bc3 17.Ke2 Bc4 18.Qc4 Rc8–+) 16...Bb5 17.Qc2 (17.Bd4 Ba4 (worse is 17...Nc6 18.Bb6 Ba4 19.Nb2 Ne5 20.fe5+=) 18.Bb6 Bc6–/+ (18...Nc6?! 19.Nb2 Ne5 20.fe5+=)) 17...Nc6–+ 18.Bc4 Bc4 (18...Ne5 19.fe5 Nd7 20.Bb5 Qb5 21.d4–+) 19.Qc4–/+ Na5 (19...Rc8 20.0–0–/+) 20.Qe2 (20.Qd3 Ra8–/+) 20...Nb3 (20...Qc7 21.Qd3–/+) 21.Bb2 Rd8 (21...Qc7 22.Qc4 Qc4 23.Nc4+=) 22.d3 (22.d4 Nd5–/+) 22...Rc8 (22...Nc5 23.0–0–/+) 23.0–0+= Qb5 24.Nc4 Qa6 (24...Ne4 25.Nf2 Nf2 26.Kf2+=) 25.Nf2+= Qc6 (25...Qa2 26.Re1+=) 26.Rb1 Nc5+= 27.Be5 Nd3 28.Qd3 Qc4 29.Qc4 Rc4 30.Nd3 h5 31.Kf2? Ng4–+ 32.Kg3 Ne3 33.Kf3 Nd5 34.g3 f6 35.Ba1 Rc2 36.h3 Kf7 37.g4 h4 38.Bd4 Nc3 39.Rb3?! Ne2 40.Ba1?? Nd4 41.Bd4+/– Rh2 42.Ke4 Rh3= 43.Ne5 fe5 44.Rh3 ed4 45.g5 Bd6 46.Rh4+= Kg6 47.Rh8 Kf7 48.Rh1 Kg6 49.Rh3 Kf7 50.Rd3 Bc5 51.Ke5 Ke7 52.Ke4 Kd6 53.Rb3 Ke7 54.Ke5 Kf7 55.Rh3+= Ke7 56.Rd3 ½–½. Krebbers,Wilfried (1935) – Sailor,Douglas (2220), Goch op, 2004.

10.Be2 cb5 11.cb5 Nbd7 12.0–0 Bd6 13.Qa4 (13.Qc2 e5=) 13...e5 14.d4 e4 15.Ne5 Qc7 16.f4 (16.b6!? Nb6 17.Qb3+=) 16...ef3!–/+ 17.Bf3 (17.Bf3 Ne5 Combination; 17.Nf3 Ng4 Combination; 17.Rf3 Ne4 Combination; 17.gf3 Ne5 Combination) 17...Ne5 18.de5 Be5 19.Be5 Qe5 20.Qd4 Qd4 21.ed4 Be6 22.Nc3 Rc8 23.Ne2 (23.Na4 Nd7 24.Kf2 Kf8–/+) 23...Rc4 (23...g5 24.Ng3–/+) 24.Ra1 (24.Nf4!?–/+) 24...g5–+ 25.h3 Rb4 26.Nc3 Rd4 27.Ra8 Kg7 28.Rb8 Rc4 29.Ne2 h5 30.g3? (30.Ng3 h4 31.Nh5 Nh5 32.Bh5–+) 30...Bh3 31.Rb7 d4 32.Kf2 Bg4 33.b6 d3 34.Rc7 d2 35.Rc4 d1Q 36.b7 Bf3 37.Kf3 Qd5 (37...Qd5 38.Kf2 Qb7–+) 0–1. Langschmidt,Dirk (2015) – Ziebarth,Susanne (1810), RSS7E–66 remoteschach.de, 2007.

10.Be2 Nbd7 11.0–0 Qa5 12.Bc3 Qa2 13.d3 Rd8 14.Nbd2 dc4 15.dc4 (< 15.Nc4 cb5 16.Ncd2 Nd5=+) 15...Nc5 16.Qa1 Qc2 (16...Qa1 17.Ra1 cb5 18.cb5=) 17.Nd4 Qa4 18.bc6 bc6 19.Qa4 Na4 20.Ba5 (20.Nc6? Nc3 21.Bf3 Rd7–+) 20...Rd6? (better is 20...Rd7!? 21.Nc6 Bd6+/–) 21.Ra1+– Nc5 (21...c5 22.Nb5 Rd2 23.Bd2+–) 22.Bb4 Nfd7 (22...Ncd7 23.Bd6 Bd6 24.Nc6+–) 23.Bc5 Nc5 24.Ra8 (24...g6 25.Rc8 Kg7 26.N2f3+–) 1–0. Kreuzer,Uwe – Kohlmann, tt Verb–Liga, 1984.

10.Be2 Nbd7 11.Nc3 dc4 A) 12.Bc4 Nb6 (12...cb5 13.Bb5 e5 14.d4 ed4 15.Nd4 Qc7 16.0–0 Bd6 17.h3 Rd8=; 12...Bb4 13.Qb3 Bd6 14.d4 e5 15.0–0 ed4 16.Nd4 Ne5 17.bc6 bc6=) 13.Be2 Bd7 14.0–0 Qc7 15.bc6 Bc6 16.Nb5 Qd8 17.Bf6 Bf6=; B) 12.bc6 Nc5 (12...Nb6 13.Ne5 Nfd5 14.Nd5 ed5 15.Bd4 Bf6 16.cb7 Bb7 17.Bb6 Qd6+=; 12...bc6 13.Bc4 Nb6 14.Be2 c5 15.0–0 Bb7 16.Qc2 c4 17.Rb1 Qc7=) 13.Bc4 bc6 14.Ne5 Bb7 15.0–0 Ncd7 16.Nd7 Qd7 17.Qc2 Ra8=.

10.Be2 Nbd7 11.Nc3 Nc5 12.0–0 Nce4 (12...dc4 13.Bc4 Bd7 14.Ne5 cb5 15.Nb5 Nce4 16.Nd4 Nd6 17.Bb3 Nfe4+=; 12...cb5 13.Nb5 dc4 14.Bc4 Nd5 15.d4 Na6 16.Qb1 Nab4 17.e4 Nb6+=; 12...Qc7 13.d4 Nce4 14.Qb3 cb5 15.Nb5 Qd8 16.Nc3 dc4 17.Bc4 Qd6+=) 13.bc6 bc6 14.Qc2 (14.Ne4 Ne4 15.d3 Nf6 16.Qc2 Bb4 17.Be5 c5+=) 14...Bd7 (14...Nc3 15.Bc3 Ne4 16.Bb2 Bd6 17.Ra1 c5+=) 15.Ne5 (15.Ne4 Ne4 16.d3 Nd6 17.c5 Nb5+=) 15...Qc7 (15...Bd6 16.d4 Nc3 17.Bc3 Ne4+=) 16.Ne4 Ne4 17.f3 (17.cd5 ed5+=) 17...Nf6 (17...Bd6+=) 18.Bd3 g6 19.c5 Rb8 20.Qc3 Qd8 21.g4 h6 22.Qd4 (22.f4 d4 23.Qd4 Be8+–) 22...Rb7 (better is 22...Be8!?+=) 23.f4+/– (23.Nd7 Qd7 24.f4 e5 25.fe5 Qg4 26.Qg4 Ng4+/–) 23...Qa5 24.g5 (better is 24.Nd7 Rd7 25.Bc3+–) 24...Rb4? (24...Bc5 25.Nc4 dc4 26.Qf6 Kf8 27.Qh8 Ke7 28.Bf6 Kd6 29.Bc4 Be3 30.de3 c5 31.Be5 Kc6+–) 25.Bc3+– Rd4 26.Ba5 Ra4 27.gf6 Bc5 28.Nd7 Ra5 29.Nc5 Rc5 30.Ra1 1–0. pvanr (2085) – fixxxer (1940), gameknot.com, 2013.

10.Be2 Nbd7 11.Nc3 Nc5 12.bc6 dc4 (12...bc6 13.d4 Nce4 14.0–0 Ba6 15.Ne5 c5 16.Ne4 Ne4 17.Bd3 f6=; 12...Nce4 13.cd5 Nc3 14.dc3 Nd5 15.cb7 Bb7 16.0–0 Qa5 17.c4 Nc3+/–) 13.Bc4 bc6 14.Ne5 Bb7 15.0–0 Ncd7 16.Nd7 Qd7 17.Qc2 Ra8 =.

9.c4 Nbd7=+

10.Nc3 dc4 11.Bc4 Nb6 12.Be2 =+.

10.Nc3 c5 11.d3 Nb6 =.

10.Nc3 c5 11.Be2 Nb6 12.cd5= ed5 (12...Nbd5 13.Nd5 Nd5 14.0–0=) 13.d4 (13.0–0 Re8=) 13...c4 14.Ne5 (14.0–0 Bf5=+) 14...Bd6 (14...Re8 15.0–0=+) 15.0–0 Qc7 (15...Re8 16.Bf3=+) 16.f4 (16.Bf3 Bf5=+ (16...Be5 17.de5 Qe5 18.Nd5+/–)) 16...Bd7 (16...Bf5 17.Bf3–/+) 17.Bf3 (17.Nd7 Qd7 18.Bf3 Re8–/+) 17...Ra8 (17...Bf5 18.Re1=+) 18.g4 (18.Qc2 Be7=+) 18...Bb4 19.g5 Bc3 20.Bc3 Ne8 (20...Ne4 21.Be4 de4 22.Qc2=+) 21.Qd2 (21.e4 de4 22.Be4 Nd6=+ (22...Bb5?! 23.Qc2+=)) 21...Bh3 (21...Bb5 22.Rb1 Nd6 23.f5–/+) 22.Rc1= f6 23.Ng4 fg5 (23...Qd7 24.Nf2 fg5 25.Ba5–/+) 24.Ne5 gf4–/+ 25.ef4 Nf6 26.Ba5 Qd6 27.Bb4 Qe6 28.Re1 Qf5 29.Bc5 Nbd7 30.Nd7 Qd7 31.b6 Ne4 32.Be4=+ de4 33.Qe2 Be6 34.f5 Bd5–+ 35.Rf1 c3 36.Qe3 c2 37.Qg5 h6 38.Qf4 Re8 39.Ba3? e3 40.Qc7 Qf7 41.Qf7 Kf7 42.Bc1 Re4 43.Re1 Rg4 (44.Kf1 Bc4 45.Re2 Rd4 46.Be3 Rd1 47.Kf2 c1Q (< 47...Be2 48.Ke2 Kf6 49.h4–+) 48.Bc1 Be2 (< 48...Rc1 49.Re4–+) 49.Bh6 Bd3–+) 0–1. Peters,Andreas (2340) – Becker,Michael (2305), Oberliga Ost–A, 2001.

10.Nc3 c5 11.Be2 dc4 12.0–0 b6 13.Bc4 Bb7 14.d3 Qa8 15.e4 Qb8 16.Qb3 Qd6 17.Ne2 Ng4 18.h3 Nge5 19.Nd2 Qc7 20.f4 Nc4 21.Nc4 Ra8 22.Bc3 Bf6 23.e5 Be7 24.Ng3 Bd5 25.Qb2 Nf8 26.Qe2 Ng6 27.Ne4 Bf8 28.g4 Rd8 29.Qe3 Ne7 30.f5 Nc8 31.Rf2 Qd7–/+ 32.Qg5 Be4 33.de4 Qe8 34.Qf4 Rd3–/+ 35.Bb2 Rh3 36.g5 Rd3 37.g6 hg6 38.Rh2 Qd8 39.fe6 fe6 40.Qg4 Qe8 41.Qh4 Rd1 42.Kf2 Qb5 43.Rh3=+ Ne7 44.Qh8 Kf7 45.Rf3 Nf5 46.ef5 gf5 47.Qh5 Kg8=+ 48.Rh3 Qa4 49.Qh8 Kf7 50.Qh5 g6 51.Qe2 Kg7 52.Ra3 Qd7 53.Rg3 53...Rh1–/+ 54.Qf3 Rh4 55.Nd6 Kh7 56.Rh3 Qa4–/+ 57.Ke1 Bg7 58.Ne4 Qb4 59.Bc3 Qb1 (59...Qe4?! 60.Qe4 Rh3 61.Qc4=) ½–½. Muri,Heinrich (2340) – Blauhut,Holger (2360), EM–MN–063 ICCF Email, 2003.

10.Nc3 c5 11.Be2 dc4 12.Bc4 Nb6 13.Be2 =+.

10.d4 =.

10.Be2 dc4 11.Bc4 Nb6 12.Be2 Bd7 13.0–0 Qa8 14.Bf6 Bf6 15.d4 Qa5 16.Qb3 Ra8 17.Nbd2 Nd5 18.Rc1 Qb6 19.g3 Be7 20.Ne5 Be8 21.Rb1 Ra3 22.Qb2 Nc3 (22...Qa7!? 23.Bc4 Bd6=) 23.Ndc4+= Qb5 24.Na3 Ne2 25.Kg2 Qd5 (better is 25...Qb2!? 26.Rb2 f6+=) 26.f3+– f6 27.Qe2 (27.Nec4!? b5 28.Qe2 bc4 29.Rb8 Ba3 30.Re8 Kf7 31.Rh8+–) 27...fe5 28.Nb5 Bd8 29.e4+– Bb5 30.Rb5 Qd4 31.Rb7 Kf7 32.h4 Be7 33.Rc7 Kf6 34.Qc2 Bd8 35.Rc4 Qe3 36.Rc3 Qe1 37.Rc6 Qa5 38.Qc4 Qd2 39.Kh3 Qd7 40.Qa6 Kf7 41.Rd6 Qc7 42.Qc6 Qa5 43.Re6 Be7 44.Qd7 Qc5 45.g4 Qa3 46.Re5 (46.Re5 Qf3 47.Kh2 Qf4 48.Kh3 Qe5 49.Qf5 Qf5 50.ef5–+ (50.gf5?? Bh4 51.e5 Bf6–+)) 1–0. Stanciu,Ad (2000) – Stroescu,Gheorghe, 1st Gaudeamus Cup, 2011.

9.Be2 c5

10.0–0 b6 11.c4 dc4 12.Bc4 Bb7 13.Nc3 Nbd7 14.Ne1 Qc7 (14...Ne5 15.Be2=+) 15.Nc2 (15.f4 Ra8=+) 15...Ra8 (15...Ne5 16.Be2 c4=+) 16.d4 (better is 16.f4!?=+) 16...cd4–/+ 17.Qd4 Nc5 (17...Bd6!? 18.f4 e5–/+) 18.Nb4 (18.Rc1=+) 18...Nce4 (18...Bd6!? 19.f4 Ncd7–/+) 19.Ne4= Ne4?? (19...Be4 20.Na6 Qb7 21.f3=) 20.Nc6 (20.Qg7) 20...Bc6?? (20...Bf6 21.Qe4 Ba1 22.Rd1=) 21.bc6 Bf6 22.Qe4+= Ra1 23.Be6 Rf1=+ 24.Kf1 Qe7?? 25.c7?? Qc7= 26.Bd5 Qc1 27.Ke2 Qb2 28.Kf3 g6? 29.Qe8+/– Kg7 30.Qf7 Kh6 31.Qf8 Bg7 32.Qf4 g5 33.Qg4 Qf6= 34.Ke2 Qb2 35.Kd3?? Qc3–+ 36.Ke2 Qb2?? 37.Kd1= Qb1 38.Kd2 Qb2 39.Kd3 Qb1 40.Ke2?? Qc2–+ 41.Kf3 Qd1 42.Kg3 Qd5 43.Qh3 Kg6 44.f4 gf4 45.ef4 Qd3 46.Kg4 Qh3 47.gh3 h5 48.Kg3 b5 49.h4 b4 50.Kf3 b3 51.Ke4 b2 52.f5 Kf6 53.Kd5 b1Q 54.h3 Qd3 55.Kc6 Qc4 56.Kd7 Bf8 57.Ke8 Qf7 58.Kd8 Bd6 59.Kc8 Qc7# 0–1. nonio – Solare,Juan Maria, Rated game, 3m + 0s, 2004.

10.0–0 Nbd7 11.c4 b6 12.Na3 Bb7 (12...Bd6 13.Qc2=) 13.Qb3 (13.d3 Qc7=) 13...Qb8 (13...Qc7 14.Qd3=+) 14.cd5 (14.Rc1 Bd6=+) 14...ed5 (14...Bd5 15.Qc3=+) 15.d3 (15.Bb2 Re8=) 15...Bd6 16.h3 Re8 (16...Qe8 17.Bb2=) 17.Qb2 (17.Qc2 Ne5=) 17...Bf8 (17...Qd8 18.Qc2=+) 18.Nc2 (18.Qc2 Qd6=) 18...g6 (18...Qd6 19.Re1=+) 19.d4= Bg7 20.Nd2 (20.Rc1 Ne4=) 20...Nf8 (20...Qd6 21.Rb1=) 21.dc5 bc5 22.Bg4 Ne6 23.Be6 fe6 24.Qe5 Qe5 25.Be5= Nd7 26.Bg7 Kg7 27.Ra1 Ra8 28.Ra8 Ba8 29.Nb3 Kf6 30.Na5 Ke7 31.f4 Kd6 32.e4 Kc7–/+ 33.ed5 ed5 34.Na3 Kb6 35.Nb3 d4 36.g4 Bd5 37.Nd2 Ka5 38.h4 Kb4 39.f5 gf5 40.g5 Ka3 41.h5 Kb4 42.g6 hg6 (43.h6 Nf6–+ (43...Kb5 44.h7+/–); 42...Kb5 43.gh7 Kc6 44.h8Q+–) 0–1. Crowl,Frank A – Ozols,Karlis, AUS op (Melbourne), 1951.

10.c4 Nbd7 11.0–0 b6 12.Nc3 (12.d3 Bb7=) 12...Bb7 (12...dc4 13.Bc4 Bb7 14.d3=+) 13.Bb2 (13.cd5 Nd5 14.Nd5 Bd5=) 13...Ne8 (better is 13...dc4!? 14.Bc4 Bf3 15.gf3 Ne5=+) 14.cd5+= ed5 15.d4 c4 16.Qc2 (16.Qa4 Nef6=) 16...Nd6 (16...Nc7 17.e4 de4 18.Nd2=) 17.Nd2 (17.Ra1 f5+=) 17...f5 (17...Nf6 18.Ra1=) 18.f4 (18.Ba3!?=) 18...Nf6=+ 19.Ra1 Qd7 (19...Qc8 20.Nf3=+) 20.Ra7 (20.Nf3 Nfe4=+) 20...Nc8 21.Ra1 Re8 (21...Qe6!? 22.Nf1 Ne4=+) 22.Nf3= g6 (22...Nd6 23.Ne5 Qc7 24.Ra4=) 23.Ne5 Qe6 24.Bf3 (24.Ba3 Nd6=) 24...Bb4 (24...Nd6 25.Ra7=) 25.Ba3 Bc3 26.Qc3 ½–½. Stiefel,x – Schmid,x, Staufen–op Schwaeb.Gmuend, 1995.

10.bc6 bc6 11.0–0 Ba6 12.Ba6 (12.d3 Nbd7=) 12...Na6 13.Qe2 Nc5 (13...Qa5 14.Be5=) 14.Ne5 (14.Bf6 Bf6 15.d4 Ne4=) 14...Qc7 (14...Qd6 15.d4 Ncd7 16.c4=+) 15.d3 (15.Nf3 Nfd7=+) 15...Ncd7 (15...Ra8 16.Nd2=+) 16.Nd7 Nd7 ½–½. Kholmov,Ratmir D (2555) – Ciocaltea,Victor (2400), Timisoara, 1977.

10.bc6 bc6 11.0–0 Nbd7 12.c4 =.

10.c4 b6

11.0–0 dc4 12.Bc4 Nd5 13.d4 =.

11.0–0 Nbd7 12.d3 Qc7 13.Nbd2 Bb7 14.Qc2 Rc8 15.Bb2 Bd6 16.Ra1 Ra8 17.cd5 ed5 18.d4 c4 19.h3 (19.Ra8 Ba8 20.Bc3 Bb7=) 19...Ra5 20.Ra5 ba5 21.Bc3 Bb4 22.e4 (22.Ne5 Qb6 23.Nd7 Nd7 24.Bb4 ab4–/+) 22...Nb6 (22...de4 23.Ne5 Ne5 24.de5 e3 25.fe3 Bc3 26.Qc3 Nd5=+) 23.Ne5 Nfd7 24.Nd7 Qd7 (< 24...Nd7 25.ed5 Nb6 26.Bc4 Bd5 27.Bb4 ab4 28.Bd3 Qc2 29.Bc2+/–) 25.ed5 (The passed pawn on d5 will quickly become a dangerous weapon) 25...Qb5 (25...Qd5 26.Bf3 Qd7 27.Bb7 Qb7 28.Bb4 ab4 29.Nc4+=) 26.Bb4 ab4 27.Bc4 Nc4 28.Qc4 (< 28.Nc4 Qd5 (28...Bd5?! 29.Ne3 f6 30.Qf5=) 29.f3 Qd4 30.Kh1 Bd5–+) 28...Qc4 29.Nc4 Kf8 (29...Bd5!? 30.Ne3 Be4=+) 30.d6= Ke8 31.Ne5 b3 32.d7 Kd8 33.Nd3 (33.Nf7 Kd7 34.Ne5 Kd6–+) 33...Ba6 34.Nb2 (34.Ne5 b2 35.Nf7 Kd7 36.Kh2–+) 34...Kd7–/+ 35.f3 Kd6 (35...f5 36.Kf2–/+) 36.Kf2=+ Kd5 37.Ke3 Bf1 38.Kf2 Bg2 (38...Bc4!? 39.Ke3 Bb5=+) 39.Kg2= Kd4 40.Na4 Kd3 41.Kg3 Kc2 42.Kf4 b2 43.Nb2 Kb2 44.Ke5 Kc3 45.h4 Kd3 46.Kf4 Kd4 47.h5 h6 48.Kf5 Ke3 49.f4 Kf3 50.Ke5 Kg4 (51.Ke4 Kh5–+) 0–1. Labahn,Wolfgang – Schmidt,G, corr Vergleichskampf, 1990.

11.d3 Bb7 =.

11.0–0 Bb7

12.d4 cd4 13.Bd4 dc4 14.Bc4 Nbd7 =.

12.d4 cd4 13.Nd4 dc4 14.Bc4 Bd5 (14...Bd6 15.f4=) 15.Nd2 (15.Bd3 Bd6=) 15...Re8 (15...Qc7 16.Bd5 Nd5 17.e4=) 16.Qe2+= Qc7 17.Bd5 Nd5 18.Rd1 (18.e4 Nf6=) 18...Nc3 (18...Rd8 19.e4 Nf6 20.N4f3=) 19.Bc3+= Qc3 20.Ne4 (20.Qc4 Rc8 21.Qc3 Rc3+=) 20...Qb4 21.Qc2 Bc5 22.Nc5 bc5 (The passed pawn on b5 will become decisive later) 23.Rb1+/– Qa3 24.Nf3 Nd7 25.Ng5 g6 26.Ne4 Rc8 27.Nd6 Rb8 28.Rd1 Nb6 29.Qe4 Nd5 30.Qf3 Qa7 31.e4 Nb4 32.e5 Nd5 33.Rc1 Rf8 34.Qe4 Qa3 35.Qc2 Nf4 36.Rd1 Qb4 37.Kh1 Nd5+= 38.Rb1 Qa3 39.b6+– Rb8 40.b7 Nc3 41.Re1 Nd5 42.Rc1 (42...Kg7 43.h3+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

12.d4 Nbd7 13.Bb2 Qc7 14.Nbd2 (14.dc5 Nc5 (14...Qc5? 15.Ba3 Qa3 16.Na3 Ba3 17.Qd4+–; 14...Bc5?! 15.cd5 Bd5 16.Nc3=; 14...bc5?! 15.Qc2=) 15.Be5 Qc8=) 14...Rd8 (14...cd4 15.Nd4 Rc8 16.Qc2=+) 15.Qb3 (15.cd5 Nd5 16.Qc1 Rc8=) 15...dc4 (15...cd4 16.Nd4 Nc5 17.Qc2=+) 16.Nc4 (16.Bc4 cd4 17.Bd4 Bd6=) 16...cd4=+ 17.ed4 (17.Bd4 Ng4 18.Ncd2 e5–/+) 17...Bd5 18.Rc1 Rc8 (18...Bd6 19.Nfe5=) 19.Qd3 (19.Qe3 Qb7=) 19...Qb7=+ 20.Bf1 (20.Nce5 Rc1 21.Bc1 Qc7=+) 20...Be4 21.Qb3 Nd5 22.Nce5 Rc1 23.Bc1 Ne5 24.Ne5 Qc7 25.Nc6 Bd6=+ 26.h3 Nf4 27.Qc3 h6 28.Bd2 Nd5=+ 29.Qa1 Bf4 30.Be1 Bh2 31.Kh1 Bd6 32.Qa7 Qa7 33.Na7 Nf4 34.Nc8= Bc7 35.f3 Bb7 36.Na7 Nd5 37.Bc4 Bd6 38.Kg1 Ne3 39.Bd3= Ba3 40.Be4 Bd5 41.Bf2 Nd1 42.Bg3 Bb2–/+ 43.Nc6 Nc3 44.Bd5 ed5 45.Bc7 Nb5 46.Bb6 Kf8 47.Bc5 Ke8 48.Kf2 f6 49.Ke3 Kd7 50.Nb4 Ke6? 51.f4 Bc3 52.f5+= Kf5 53.Nd5 Bb2 54.g4 Ke6 55.Nf4+/– Kd7 56.h4 g5 57.hg5+/– Bc1 58.Ke4 hg5 59.Nd3 Bd2 60.Kf5 Be3 61.Kf6 Bd4 62.Bd4 Nd4 63.Kg5 Nf3 64.Kf4 Nd4 65.Ke4 Ne6 66.Ke5 Ke7 ½–½. Levin,Anatoly (1960) – Szeberenyi,Adam (2610), 2003.

12.d4 Nbd7 13.Qc2 cd4 14.Bd4 Qc7 =.

12.d4 Nbd7 13.Nc3 dc4 14.dc5 Bc5 15.Qa4 Qe7 16.Qc4 Rc8 17.Qh4 Bb4 18.Na4 Nd5 19.Qe7 Be7 20.Ne5 Ne5 21.Be5 Ra8 22.Nc3 f6 23.Bd4 Nc3 24.Bc3 Bc5 25.Bc4 Ra3 (better is 25...Kf7!?=) 26.Bb2 Ra5 27.Be6 Kf8 28.Bc3 Ra3 29.Rc1 Ke7 30.Bg8 h6 31.Bb2 Ra5 32.Bc4 Ra4 33.Bf1 Kd6 34.Rd1 Kc7 35.h3 Be4 36.Bd4 Bd4 37.Rd4 Rd4 38.ed4 g5 39.f3 Bd5 40.Kf2 f5 41.Ke3 f4 42.Kd3 Kd6 43.Kc3 Be6 44.Bc4 Bc4 (better is 44...Bd7!?+/–) 45.Kc4+– h5 ½–½. Kocandrle,Jaroslav (2085) – Geiger,Walter (2050), IECG, 2006.

12.d4 Nbd7 13.cd5 Nd5 14.Nbd2 =.

10.c4 dc4

11.Ne5 b6 12.0–0 =.

11.Ne5 Nd5 12.Nc4= Nd7 13.0–0 Bf6 (13...N7b6 14.d4=) 14.Nba3 (14.Nc3 b6=) 14...N7b6 (14...Qe7 15.Qc2=) 15.Qb3 (15.Qc2 Nb4 16.Bf6 Qf6+=) 15...Nc4 16.Nc4 Ba1 (16...Qe7 17.Bf3=) 17.Ra1+= Nb6 (17...Qf6 18.Ra7+=) 18.Nb6 Qb6 19.Qc4 Qd6 (19...Bd7 20.d4 cd4 21.Qd4 Qd4 22.ed4+/–) 20.d4 cd4 21.ed4 (21.Qd4 Qe7+=) 21...Bd7 (21...e5 22.de5 Qe5 23.Ra7=) 22.Rc1 h6 23.Qa4 Qf4 24.Rd1 Rc8 25.g3 Qe4 26.Bf1 Qd5 27.Bg2 Qb5 28.Qb5= Bb5 29.Bb7 Rb8 30.Bf3 Ba4 31.Rd2 Kf8 32.Kg2 Ke7 33.Be4 Kd6 34.f4 Rb4=+ 35.Kf3 f5 36.Bd3 Rd4 37.Ke3 e5 38.Bf5= Rd2 39.Kd2 ef4 40.gf4 Kc5 41.Ke3 Be8 42.Bd3 Kd5 43.Bf5 Bh5 44.Bc8 Bf7 45.Bf5 Be6 46.Bc2 Bh3 47.Bb3 Kd6 48.Kd4 Be6 49.Bc2 Bd5 50.Bf5 Ba2 51.Be4 Be6 52.Bf3 Bf5 53.Bd5 Bg4 54.Bc4 Be6 55.Bd3 Bd5 56.Bf5 Bb7 57.Bg4 g6 58.Bh3 h5 59.Ke3 Ke7 60.Kf2 Kf6 61.Ke3 Bd5 62.Bd7 Be6 63.Bb5 Bf5 64.h4 ½–½. Kesmaecker,Philippe – Scavo,Fernando, France, 1999.

11.Ne5 Nd5 12.Nc4= f6 13.0–0 =.

11.Bc4 Nbd7

12.0–0 b6 13.d3 Bb7 14.Nbd2 Qc7 15.Qc2 Ra8 =.

12.0–0 b6 13.d3 Bb7 14.Nbd2 Qc7 15.Qc2 Ng4 16.Bc3 Ra8 17.h3 Nge5 18.Ne5 Ne5 19.f4 Nc4 20.Nc4 Bd5 (20...f6 21.Qe2=) 21.e4 Bc4 (21...Bb7 22.Qe2+=) 22.dc4 Rd8 23.Qe2 Qd6 24.Be5 Qd3 (24...Qd7 25.Qg4 f6 26.Ba1+=) 25.Qd3+/– Rd3 26.Ra1 f6 27.Bc7 Rd4 28.Ra4 Kf7 (28...Re4 29.Kf2+/–) 29.Bb6 Re4 30.g3 e5 (30...Re1 31.Kg2+/–) 31.Ra7 (better is 31.fe5 fe5 32.Bc7+/–) 31...ef4?? (better is 31...Ke8 32.Bc7 Rc4+/–) 32.Bc5+– fg3 33.b6 Rc4 34.Re7 Kf8 35.Ba3 (35...Ra4 36.Ra7 Ra3 37.Ra3+–) 1–0. pierre – losmik, ChessHere.com, 2005.

12.0–0 b6 13.d3 Bb7 14.Nbd2 Qc7 15.e4 Ng4 (15...Qf4 16.Bc3=) 16.Qe2 (16.h3 Ngf6=) 16...Bd6 (16...Rd8 17.Rd1=) 17.g3 (17.h3 Nge5=) 17...Nge5 (17...Ra8 18.d4=) 18.Bb3 (18.Ne5 Be5 19.f4 Ba1 20.Ra1 Rd8=) 18...Rd8 (18...Ra8 19.Nh4=+) 19.Ne1 (19.Rc1 Nf3 20.Nf3 Ra8=) 19...Be7 (19...Ng6 20.f4=+) 20.f4= Ng6 21.Nef3 Nf6 22.Ng5 h6 23.Nh3 Nf8 24.Nf3 Ne8 25.Ne5 f6 26.Nc4= Qd7 27.Bc2 Qb5 28.Rb1 Qa6 29.Nb6 Nd6 30.Nc4 Nb5 31.Bb3 ½–½. Teichmann,E – Rujevic,M, Melbourne, 1998.

12.0–0 b6 13.d4 =.

12.0–0 Qc7 13.Qe2 =.

12.0–0 Nb6

13.Na3 Nc4 14.Nc4 Qd7 15.b6 =.

13.Na3 Nc4 14.Nc4 Bd7 15.Qb1 (15.Qb3 Nd5=) 15...Nd5 16.d4 Nb4 (16...f6 17.dc5 Bc5 18.Bd4=) 17.Rd1+= Qc7 (better is 17...cd4!? 18.Bd4 Qe8+=) 18.b6 Qc8 19.Nce5 (19.dc5 Bc5 20.Ng5 g6+–) 19...Rd8 (19...Ba4 20.Rc1+=) 20.Rc1 (20.dc5 Na6 21.Nf7 (21.Rd7?! Rd7 22.Nd7 Qd7+=) 21...Kf7 22.Qh7+–) 20...Na6+= 21.dc5 (better is 21.e4+=) 21...Nc5? (better is 21...f6 22.Nd7 Qd7=) 22.Bd4 Ba4 23.Nd3?? Nd3= 24.Rc8 Rc8 25.Bb2? Nb2?? 26.Qb2+/– Rc2 27.Qa1 Bf6 28.Nd4 (28...Bd4 29.ed4+/–) 1–0. Giudice,U – Ammendola,G, Cava de Tirreni, 1972.

13.Na3 Nfd5 14.Be2 =.

13.d3 Nc4 14.dc4 Nd7 15.Qc2 =.

13.d3 Nfd5 14.Nbd2 f6 15.Qe2 =.

13.d3 Nfd5 14.Nbd2 Bf6 15.Ne4 (15.Qb3 Be7+=) 15...Qe7 (15...Be7 16.Qe2+=) 16.Ne5 (16.Qc2 Ba1 17.Ra1 Nb4=) 16...Rd8 (16...Be5 17.Be5 Rd8 18.Qf3+=) 17.Qe2 (17.Nf6 Nf6 18.Qf3 Nfd5=) 17...Be5 18.Be5 f6 19.Bb2 e5 (19...f5 20.Ng3+=) 20.Ba3 Nc4 21.dc4 Nb4 22.Bb4 cb4 23.c5 Be6 24.Qb2 b3 25.Qc3 Qc7 26.h3 f5 27.Ng5 Bd5= 28.e4 fe4 29.Re1 Qe7 30.Ne4+= Rf8 31.Re2 Qe6 32.Ng3 Qf6 33.Nf1 e4= 34.Qf6 gf6 35.Rd2 Be6 36.Ng3 f5 37.Ne2 Rc8 38.Nd4=+ Rc5 (39.g4 Kf7 40.gf5 Bc4–+) 0–1. Labahn,Wolfgang – Krause,P, corr FRG–chT qual, 1991.

13.d3 Nfd5 14.Qe2 f6 =.

13.d3 Qd7 =.

13.d3 Bd7 =.

13.d3 Nfd7 =.

13.Be2 Nbd5 14.Nc3 b6 15.Nd5 ed5 16.Qc2 =.

13.Be2 Nbd5 14.Nc3 Nc3 15.dc3 Qc7 (15...b6 16.c4=) 16.c4+= Nd7 17.Qc2 Bf6 (17...b6 18.Bd3 f5 19.e4+=) 18.Bf6 (18.Bd3 h6+=) 18...Nf6 19.Rd1 (19.Qb2 Rd8+=) 19...Rd8 (19...e5 20.Ng5+=) 20.Rd8 Qd8 21.Qd3 Qd3 (21...Qc7 22.Ne5=) 22.Bd3 b6 ½–½. Sternik,Ryszard – Wojtunik,P, Olsztyn, 1985.

13.Be2 Nbd5 14.d4 Qa5 15.Nbd2 cd4 16.Bd4 Nc3 17.Bc3 Qc3 =.

13.Be2 Nfd5 14.Na3 f6 15.Nc4 (15.Qb3 Qd7=) 15...Bd7 (15...e5 16.Qc2=) 16.Qb1 (16.Qb3 Qc7=) 16...Nc4 (16...Nb4 17.Nb6 Qb6 18.Qe4=) 17.Bc4 Qb6 (17...Nb6 18.Bd3 f5 19.Be2+=) 18.Bd3 (18.d4 Nc7 19.dc5 Bc5=) 18...h6 (18...Kh8 19.Bh7 Bb5 20.Rc1=) 19.Qb3 Nb4 (19...Rd8 20.Bc4=) 20.Bc4+= Re8 (20...Kf7 21.Qa4=) 21.Qa4 Na6 22.Rb1 Nc7 23.Bc3 Ra8 24.Qb3 Kh7 25.h3 Qd6 26.d4 cd4? 27.Nd4?? f5 28.Nc2 e5+= 29.Bb4 Qf6 30.Rd1 Rd8 31.Na3 Bb4= 32.Qb4 Be6 33.Be6?? Rd1–+ 34.Kh2 Qe6 35.Nc4 e4 36.Qc5 Ne8 37.b6 Rc1 38.Qb5 Rc4 39.Qa5 Qd6 40.g3 Qc5 41.Qa8 Rc2 (42.Qb8 Rf2 43.Kg1 Qe3 44.Qe8 Qe1#) 0–1. Frosinos,I – Zvan,Z, Chania, 1998.

13.Be2 Nfd5 14.d4 c4 =.

13.Be2 Nfd5 14.d4 cd4 15.Bd4+= Bd7 16.Qb3 Bf6= 17.Ne5 Qe7 18.Nd2 Be5 19.Be5 Ra8 20.Nc4 Nc4 21.Bc4 Nb6 22.Be2 Qa3 23.Qc2+/– Qa2 24.Bb2 Rc8+= 25.Qd2 Qd5 26.Rd1 Qd2 27.Rd2 f6 28.h3 Rc5 29.Bd4 Rc1 30.Kh2 Nc4= 31.Bc4 Rc4 32.Bf6 Bb5 (32...gf6 33.Rd7) ½–½. Apgar,Robert F – Ryan,Randall J, US Amateur Team East, 2006.

13.Be2 Bd7 14.Qc2 =.

13.Be2 Ne4 14.Qc2+= Qd5 15.Nc3 Nc3 16.Bc3 c4 17.Rb1+/– f5 18.Ba5 Bc5 19.Bb6+– Bb6 20.Qc4 Qd6 21.d4 Bd7 22.Ne5 Rc8 23.Qb3 Kf8 24.h3 Ke7 25.Bf3 Qb8 26.Qb4 Qd6 27.Qd6 Kd6 28.Bb7 Rb8 29.Nd7 Kd7 30.Bc6 Kd6 31.Kf1 Rc8 32.Ke2 Rc7 33.Ra1 Ra7 34.Ra7 Ba7 35.Kd3 Bb6 36.f3 Ba7 37.e4 e5 38.de5 Ke5 39.ef5 Kf5 40.Be4 Kf4 41.Bh7 g5 42.Kc4 Ke5 43.g3 Bf2 44.h4 (44...gh4 45.gh4 Bh4 46.Kc5+–) 1–0. Lipok,E – Heiduczek,J, Germany, 1992.

9.Be2 c6

10.0–0 Qa5 11.Bc3 Qa4 12.Be5 Nbd7 13.Nc3 Qa5 14.Qa1 (14.Bf4 Ne4 15.Ne4 de4=) 14...Qb6 (14...Qa1 15.Ra1 Ne4 16.bc6 bc6 17.Nb1=) 15.Bg3 (15.Bf4 c5=) 15...Nc5 (15...Nh5 16.Bh4 Bh4 17.Nh4=) 16.bc6+= bc6 17.Rb1 Qd8 18.Ne5 Bd7 (18...Qe8!?+=) 19.Qa7+/– Qa8 20.Ra1 Qa7 (20...Qd8 A) 21.Nd7?! Ncd7 (21...Nfd7? 22.d4+–) 22.Qb7 Qc8+=; B) 21.d4 Nce4 22.Ne4 de4 23.Rb1+–) 21.Ra7 Bd6? (better is 21...Bd8 22.d4 Bb6+–) 22.Nd7 Ncd7 23.Bd6 Rc8 (23...Rd8 24.d4+–) 24.Ba6 Re8 (24...Rd8 25.d4+–) 25.Bb7 (25...Nb6 26.Bb4+–) 1–0. Beekes,Noud – Nash,Chris, SL–2006–0–00041, 2006.

10.0–0 Qa5 11.Bc3 Qb6 12.bc6 Nc6 13.Bf6 Bf6 14.d4 =.

10.0–0 Qa5 11.Bc3 Qc7 12.Be5 Bd6 13.Bf6 gf6 14.c4 c5 (14...cb5 15.cb5 Nd7 16.Nc3=) 15.cd5 ed5 16.Qa4 Qd7 (better is 16...c4!?+=) 17.Nc3+/– b6 18.Qh4 Qf5 19.d4 (19.e4 de4 20.Ne4 Be7+–) 19...c4? (better is 19...Nd7+/–) 20.e4+– de4 21.Ne4 Be7 22.Bc4 Qg6 23.Re1 Bb7 (23...Bg4 24.Nfd2 Bd8 25.h3+–) 24.Bd3 1–0. gluv51 (2040) – rona81 (2015), gameknot.com, 2015.

10.0–0 cb5 11.Bb5 Bd7 =.

10.0–0 Bd7 11.Nc3 Qc7 12.bc6 Nc6 13.d3 (13.Nb5 Qb6=) 13...Bb4 (13...Nb4 14.e4=+) 14.Nb5= Qa5 (14...Qd8 15.c3 Bc5 16.c4=) 15.Bf6 (15.c4 Be7=) 15...gf6 (15...Qb5 16.Ne5 Ne5 17.Be5=) 16.Nbd4 (16.d4 Ra8=) 16...Nd4 (16...Bc3 17.Nb3 Qc7 18.Nc5=) 17.Nd4 Ba4 (17...Bc3 18.Bh5=) 18.Qb1 (18.Bh5 f5=) 18...Rc8 (18...Bc3 19.Nf3=) 19.c4+= dc4 (19...Bd6 20.cd5 Qd5 21.Bf3+=) 20.dc4 Rd8 (20...Rc7 21.Qa2 Be1 22.Bd3+=) 21.Qe4+/– Qa8 (21...Rd7 22.Rb1+/–) 22.Qg4 Kh8 23.Qh4 Be7?? (better is 23...Kg7+/–) 24.Bd3+– Kg7 (24...f5 25.Qe7 Rd7 26.Qf6 Kg8 27.Qg5 Kh8 28.Bf5 Qd8 29.Qd8 Rd8+–) 25.Qh7 Kf8 26.Qh8# 1–0. Mauron,Regis – Brih,Touatia, Montigny op, 1999.

10.0–0 Bd7 11.Ne5 =.

10.0–0 Nbd7 11.c4 Qb6 12.cd5 (12.Nc3 dc4 13.Bc4 Rd8=) 12...ed5 13.Nc3 Bd6 (13...c5 14.Qc2=) 14.Qc2 Ne5 (14...Re8!?=) 15.Ne5+/– Be5 16.Nd5 (16.Na4 Qc7 17.Be5 Qe5 18.bc6+=) 16...Nd5 (better is 16...Bh2!? 17.Kh2 Nd5 18.bc6 bc6+=) 17.Be5+– cb5 18.Qb2 f6 (18...Qg6 19.Qb5 Rd8 20.Ra1+–) 19.Bd4 (19...Qe6 20.Qb5+–) 1–0. pcmvr (2560) – rhand (2255), net–chess.com, 2006.

10.c4 Qa5 11.Bc3 Qb6 12.bc6 bc6 13.0–0 Ba6 (13...Nbd7 14.d4=) 14.d4 Nbd7 15.Nbd2 Rb8 (15...c5 16.Qc2=) 16.Qa4+= c5 17.Rb1 Qd6 (17...Qb1!? 18.Nb1 Rb1 19.Be1 Bc4 20.Bc4 dc4 21.Qc4 cd4 22.Qd4 Bb4+/–) 18.Rb8+/– Nb8 19.dc5 Qc5 20.Be5 Bd6 21.Nb3 Qc7 22.Bd6 Qd6 23.c5 Qd7 24.Qd7 Nfd7 (24...Nbd7?? 25.Ba6 Ne8 26.c6+–) 25.Ba6 Na6 26.c6 Ndb8 (26...Nb6 27.Kf1+=) 27.Nbd4 (27.Na5 Kf8+=) 27...Nc7 (27...Kf8 28.g4=) 28.Ne5 Kf8 29.Nd3 (29.f4 f6 30.Nd3 Ke7=) 29...Ke7 30.f4 f6 (30...Kd6 31.Nb4=) 31.Nb4–/+ Kd6 32.g4 e5 33.fe5+= fe5 34.Nf5+/– Kc5 35.Nd3 Kc6 36.Ne5 Kc5 37.Ng7 Nc6 38.Nf7 Kc4 39.Nh5 Kd3 40.Kf2 Ne8 41.Nf4 Kc4 42.g5 d4 43.Ke2 de3 44.Ke3 Ne7 45.Ke4 Kc5 46.Ne6 Kc6 47.Nf8 Nd6 48.Nd6 Kd6 49.Nh7 Ke6 50.h4 Kf7 51.Nf6 Kg6 52.Kf4 Nc6 53.h5 Kg7 54.Ne8 Kf8 55.Nd6 Ne7 56.g6 (56...Kg8 57.Kg5+–) 1–0. b4_player – opponent, gamecolony.com, 2008.

10.c4 Qa5 11.Bc3 Qd8 12.0–0 =.

10.c4 cb5 11.cb5= Qb6 12.Bd4 Qa5 (12...Qd8 13.0–0=) 13.Nc3 (13...Nbd7 14.Ne5=; 13.0–0 Nbd7+=). orane (2160) – HMBCHESS2, Live Game Caissa's Web, 2005.

10.c4 cb5 11.cb5= Bd6 12.Be5 =.

10.c4 cb5 11.cb5 Nbd7 12.0–0 Nc5 (12...Bd6 13.d4=) 13.d4 (13.Bf6 Bf6 14.d4 Ne4+=) 13...Nce4 14.Nc3 (14.Ne5 Qa5 15.Bb2 Nd7=) 14...Qc7 (14...Qb6 15.Ne5=) 15.Qb3 (15.Ne4 Ne4 16.Qb1 b6=) 15...b6 (15...Bd7 16.Rc1=) 16.Ne4 Ne4 17.Bb2 Bd6 (17...Bb7 18.Rc1 Qd6 19.Ne5=) 18.Rc1 (18.Ba3 Ba3 19.Qa3 Bd7+=) 18...Qb8 (18...Qe7 19.Qa4=) 19.Ba3+= Bb7 20.Bd6 Nd6 (20...Qd6 21.Bd3+=) 21.Ne5 (21.Qb4 Rc8 22.Rc8 Bc8+=) 21...Rc8 22.Qa3 (22.Qb1 Rc1 23.Qc1 f6+=) 22...Rc1 23.Qc1 Qc8 (23...f6 24.Nc6 Qc7 25.Bd3=). Dluhosch,Thomas – Habrich,Werner, corr FRG–ch, 1985.

10.c4 dc4 11.Bc4 cb5 12.Bb5 Qa5 13.Nc3 Bd7 14.Bd7 (14.Qb1 Rc8 15.Bd7 Nbd7=) 14...Nbd7=+ 15.0–0 Rb8 (15...b5 16.Ne2=+) 16.Nd4 (16.Qe2 Qh5=) 16...Bb4 (16...Qa6 17.Ndb5=) 17.Qb3 (17.Qf3 Ne5 18.Qg3 Bd6+=) 17...Nc5 (17...e5 18.Ndb5=+) 18.Qc4= Nce4?? (better is 18...e5 19.Ndb5 Rd8=) 19.Ne4+– Ne4 20.Nb3 Qa3 21.Qe4 Qb3 22.Qe5 (22...Bf8 23.Qb8+–) 1–0. Feldman,Yevgeny – Dorosin,Neil S, Marshall Furity op, 1999.

10.c4 dc4=+ 11.Bc4 cb5 12.Bb5 Bd7 13.Qa4 (13.Bd7 Qd7 14.Bf6 Bf6=) 13...Qb6 14.Nc3 Rc8 15.Bd7 Nbd7 16.0–0 Nc5 (16...Qa6 17.Qc2=+) ½–½. Pedersen,Erik (2410) – Sorensen,Bent (2300), DEN–chT, 1994.

10.c4 dc4 11.Bc4 Bd7 12.Nc3 =.

9.Be2 Nbd7

10.0–0 Nc5 11.d4 Nce4 12.Ne5 Nd7 13.Nd2 =.

10.0–0 c5

11.c4 b6 12.cd5 ed5 13.d4 c4 14.Nc3 Qc7 15.Qc2 Bb7 16.Nh4 Ne4 17.Ne4 Bh4 (worse is 17...de4 18.Nf5 Nf6 19.Qc4+/–) 18.Nc3 Be7 19.Bb2 Bd6 20.h3 Ra8 21.e4 de4 22.Ne4 Bh2 23.Kh1 Bf4 24.Rd1 (24.Bc4? Rc8 25.Bf7 Kf7 26.Qc7 Rc7–+) 24...Ra5 25.f3 (25.Nc3 Nf6=) 25...Rb5 26.Bc1 Nf6 (26...Rb4 27.Bf4 Qf4 28.Bc4+=) 27.Bc4 (27.Nf6 gf6 28.Bc4 Rg5+/–) 27...Rh5 (27...Ne4 28.Bf4 Nf2 29.Qf2 Qc4 30.Qg3+=) 28.Qe2 (28.Nf6 gf6 29.Bf4 Qf4+=) 28...Bc1 29.Rc1 Ne4 ½–½. Jaeger,Eric – Castilho,Miguel, corr WS/O/147 ICCF, 2007.

11.c4 dc4 12.Bc4 b6 =.

11.c4 dc4 12.Bc4 h6 13.Na3= Qa5 14.Qb3 Nb6 (14...Nd5 15.Bb2 N7b6 16.e4 Nb4 17.Be2 Na4 18.Be5 Bd7 19.Bf4 Nb6 20.Ra1 Ra8; 14...Qb4 15.Qa2 Qa4 16.Bb3 Qa8 17.Nc4 Qa2 18.Ba2 Nd5 19.Bb3 N7f6 20.Nfe5 Bd7; 14...Qc7 15.Bd3 b6 16.Nc4 Bb7 17.Nfe5 Ra8 18.Bc3 Nd5 19.Bb2 Nb4 20.Be2 Ne5) 15.Bc3 Qa4 16.Ra1 (16.Qa4 Na4 17.Ba5 Nb2 18.Ne5 Nd7 19.Nf3 b6 20.Bc3 Nc4) 16...Nfd5 (16...Qb3 17.Bb3 Nbd5 18.Bb2 Bd7 19.Ne5 Ra8 20.Nd7 Nd7) 17.Be5 (17.Bb2 Bd7 (17...Qb4 18.e4 Nf6 19.d3 Rd8 20.Qc2 Nc4) 18.Ne5 Qb4= (18...Ra8 19.Nd7 Qb3 20.Bb3 Nd7) 19.Nd7 Nd7 20.e4 Bf6; 17.Qa4 Na4 18.Be5 Bd7 19.Nc2 Ra8 20.Bg3 Be8) 17...Qb4 (17...Qb3 18.Bb3 Bd7 19.e4 Nf6 20.d3 Ra8) 18.e4 f6 (18...Nf6 19.Qc2 Bd7 (19...Nc4 20.Nc4 Qb5) 20.Bc3= Qa4) 19.Bg3 (19.Bd5?? ed5 (19...Nd5?! 20.Qb4 Nb4 21.Bc3–/+) 20.Qb4 cb4–+; 19.ed5 fe5 20.Qa2 (20.Qd3 Rd8) A) 20...Nc4?! 21.Nc4 (21.Qc4? e4 22.Ne5 Bf6–+) 21...Qb5 22.d6+=; B) 20...e4+=; C) 20...Rd8+=) 19...Bd7 (19...Nc4 20.Qb4 Nb4) 20.ed5 Ra8 21.Qb4 (21.Re1!? Qb3 22.Bb3 Ra3 23.de6 Bb5 24.Bc2=) 21...cb4–/+ 22.de6 Nc4 23.ed7 Na3 24.Nd4 (24.Rc1 Rd8 25.Re1 Rd7 26.Re3–+) 24...Rd8–/+ 25.Nc6 Rd7 (25...bc6?? 26.bc6 Nc2 27.Ra5 Rd7 28.cd7+–) 26.Ne7 Re7 27.Kf1 Re6 28.f3 Rb6 29.Ra2 Rb5 30.d3 Nb1 31.Ke1 Nc3 32.Rb2 b3 33.Kd2 Na4 34.Rb1 Kf7 35.Bd6 g5 36.g4 b2 37.Kc2 Ke6 38.Ba3 Ke5 39.Be7 Rb6–+ 0–1. Trokenheim,Marek (2175) – Duchene,Klaus (2170), RSS7E basic–28, 2010.

11.bc6 bc6 12.c4 Qa5 13.Nc3 dc4 14.Bc4 Nb6 15.Be2 Rd8 16.Nd4 Bb7 17.Bf3 Nc4 18.Qc2 Ne5 19.Be2 c5 20.Nb3 Qb6 21.Rb1 Ba8 22.f3 Nc6 23.Na4 Qb4 The backward pawn on d2 becomes a target 24.Nd4 cd4 (worse is 24...Nd4 25.Bd4 Qb1 26.Qb1 cd4 27.Qb5+=) 25.Rb4 d3 26.Qc1 Nb4 27.Bd1 Bc6 28.Bc3 Ba4 29.Ba4 Nbd5 30.Qb2 h6 31.Be5 Rc8 32.Kf2 Bb4 (32...Nb4!?+/–) 33.Bb3 Ba5 34.Qa2 Bb6 35.Qa6 Rd8 36.Bf6 gf6 37.Bd5 Be3 38.Ke3 Rd5 39.f4 Kg7 40.g4 Kg6 41.Qc8 Kg7 42.h4 Rd6 43.Qc7 Rd5 44.Qe7 e5 45.f5 Rb5 (45...e4+–) 46.g5 fg5 47.f6 Kg6 48.h5! Kh5 49.Qf7 1–0. Lorenc,Tomas (2125) – Vanek,Tomas Jr (2145), CZE–chT2b, 2005.

11.d3 Qa5 12.Nc3 =+.

11.d3 Qc7 12.c4 dc4 (12...Rd8 13.Nbd2=) 13.dc4 b6 14.Nbd2 Bb7 15.Qc2 Bd6 (15...Ng4 16.Bc3=) 16.Bd3 (16.Rd1 Ng4 17.h3 Ngf6=) 16...Ne5 (16...Rd8 17.Rd1=) 17.Ne5 (17.Be5 Be5 18.Ne5 Qe5=) 17...Be5 18.f4 (18.Be5 Qe5 19.Be2 Ne4=) 18...Ba1 19.Ra1 Ng4 (19...e5!? 20.f5 e4=) 20.Bh7+= Kh8 21.Be4 (21.Qd1 f5 22.h3 Ne3+=) 21...Ne3= 22.Qd3 Be4 23.Qe4 Nf5 24.Nf3 Rd8 25.Ng5 Kg8 26.g4 Ne7 27.Ra8 Kf8 28.Qe6!+/– fe6 29.Ne6 Kf7 30.Nc7 Rd4 31.Ra7+– Nc8 32.Rb7 Rc4 33.Nd5 Kg6 34.f5+– Kh6 35.Rc7?? Nd6?? 36.Rc6+– Kg5 37.Rd6 Rc1 38.Kf2 Kg4 39.Ne3 Kf4 40.Rb6 Rb1 41.Nd5 Kf5 42.Nc7 (42...Rb2 43.Ke3 Rh2 44.Rc6 Rh3 45.Kd2+–) 1–0. Bernstein,Osip – Denker,Arnold, New York, 1959.

10.0–0 Bd6

11.c4 dc4 12.Bc4 e5 13.d3 Qe7 14.Nbd2 Nb6 15.Bb3 Bd7 16.Nc4 Nc4 17.Bc4 c6 18.bc6 Bc6 19.e4 b5 20.Bb3 Bb7 21.Qd2 Nd7 22.Rb1 Nc5 23.Ba2 Bc6 24.Qc3 (24.Bd5 Bd5 25.ed5 Ra8=) 24...Qa7 (24...Ra8 25.Qc2+=) 25.Bd5 (25.Bb3 Re8+= (worse is 25...Nb3 26.Qc6 Rd8 27.Bc3=)) 25...Bd5+= 26.ed5 Qa2 27.Nd2 (better is 27.Rb5!? Ra8 28.Bb2+=) 27...Ra8 28.Bb2 (better is 28.f4 f6 29.fe5 fe5 30.Bb2–/+) 28...Qd5 29.Ne4 (29.d4 Na4 30.Qf3 Qf3 31.gf3 Nb2 32.Rb2 ed4 33.Rb5 Rd8–+) 29...Nd3 30.Nd6 Qd6 31.Rd1 Nb2 (31...Nb2 32.Rb1 Nd3–+) 0–1. Schaar,Joerg (1940) – Ziebarth,Susanne (1810), remoteschach.de, 2006.

11.d4 Nb6 12.Qd3 Bd7 13.Nbd2 c6 14.bc6 Bc6 15.Bb2 Ne4 16.Ba3 Ba3 17.Qa3 Nd2 +=.

11.d4 Nb6 12.Nbd2 Bd7 13.Qb1 Qe8 14.c4 dc4 15.Nc4 Nc4 16.Bc4 Nd5 17.Ne5 Qe7 18.e4 Nb6 19.Nd7 Qd7 20.Bd3 g6 21.Qb3 Ra8 22.d5 Ra3 23.Qb2 e5 24.Qc2 Na4 25.Be2 Qe7 26.Bc4 Qh4 27.Kh1 Qf4 28.f3 Qe3 29.Rd1 h5 30.Qc1 Qc5 31.Bf1= Qc1 32.Rc1 h4 33.Re1 Kf8 34.Rc1 f6 35.Be2 Re3 36.Bf1 Ke7 37.Rd1 f5–/+ 38.ef5 gf5 39.Bd3 f4 40.Bf5=+ Nb6 41.Be4 Nd7 42.Bd3 Bb4 43.Kg1 Kd6–/+ 44.Bb2 Nc5 45.Bg6 Na4 46.Ba1 Ra3 47.Bc2 Nb6 48.Bd3 Bc5 49.Kh1 Bd4 50.Bd4 ed4 51.Bc2 Kc5 52.d6 cd6 53.Bd3 d5 54.Kg1 Nc4 55.Be2 Rb3 56.Kf2 Rb5 57.Rc1 Rb2 58.Ke1 b5 59.Ra1 (59.h3 b4–+) 0–1. Pilz,Erhard – Felkel,Siegfried, TT–19 ETC, 2005.

11.d4 Nb6 12.Nbd2 Bd7 13.c4 dc4 14.Nc4 (14.Qb1 c6 15.Bc4 Nc4 16.Nc4 Qe7 17.Nd6 Qd6 18.Bc3=) 14...Bb5 (14...Nc4 15.Bc4 c6 16.Bd3 cb5 17.e4 Nh5 18.e5=) 15.Nb6 Be2 16.Qe2 cb6 17.e4 Be7 (17...Bf4 18.Rb1=) 18.Bb2 (18.Rc1=) 18...Qc7 19.Ne5 Rc8 20.Ra1 b5 21.Nd3 (21.Qb5 Ne4) 21...b4 22.Qf3 b5 23.Re1 Nd7 (23...Qd8 24.Rb1+=) 24.Qh5 Qb7 25.Qg4 Bf6 26.Nf4 Rc2 27.Nd3 Qc7 28.Rb1 (28.Ra1 Rd2 29.e5 Be7–/+) 28...Qc4 (28...Rc4 29.Qd1–/+) 29.Qd1 Bg5 30.f4 Be7 31.Rc1 b3 32.h3 Nb6 33.Ne5 Rc1 34.Qc1 Qc1 35.Bc1 Bb4 36.Kf2 Bd2!! 37.Bb2 Na4 38.Ba1 Bf4 39.Nd3 Bd6 40.Ke2 Ba3 41.Ne5 b2 42.Bb2 Bb2 43.Nc6 Kf8 44.Kd3 Ba1 45.g4 f6 46.h4 e5 47.Ke3 Bd4 48.Nd4 ed4 49.Kd4 Kf7 50.e5 h5! (50...h5 51.gh5 f5–+) 0–1. Buczinski,Henryk – Felkel,Siegfried, corr TT–19, 2006.

11.d4 Re8 12.Nbd2 e5 (12...c5 13.bc6 (13.dc5 Nc5 14.c4 e5 15.cd5 e4 16.Nd4 Nd5 17.Bc4 Nb6=) 13...bc6 14.c4= Ba6 15.c5 Be2 16.Qe2 Bc7 17.Bc3 e5=; 12...Nb6 13.Ne5 Nfd7 14.Bd3 Qh4 15.f4 f6 16.Nef3 Qh5 17.c4 dc4=) 13.de5 (13.Nc4 e4 14.Nd6 cd6+= 15.Nd2 Qc7 16.Qb1 Nb6 17.Rc1 Bg4=) 13...Ne5= 14.Be5 (White gets the initiative) 14...Be5 15.Ne5 Re5 16.Nf3 Re8 17.Qd4 Qd6 18.Ra1 Bf5 19.Qa7 Bc2 (19...b6 20.Nd4 Bg4 21.Bd3+=) 20.Qb7+/– g6?? (better is 20...Be4 21.Nd4 Qc5+/–) 21.Ra6+– Qe7 22.Qc6 Ne4 (22...Bf5 23.Qf6 Qf6 24.Rf6+–) 23.Qc2 Nf2 24.Kf2 Qe3 25.Kf1 d4 26.Ra4 Rd8 27.Qc7 Re8 28.Nd4 Re4 29.Ra7 Rf4 30.Nf3 Qe4 31.b6 (31...Rf6 32.b7 Qb1 33.Kf2 Qb6 34.Qb6 Rb6 35.Ra8 Kg7 36.b8Q Rb8 37.Rb8+–) 1–0. pierre – elffe, internet, 2008.

11.Nd4 c5 12.bc6 bc6 13.Nc6 Qc7 14.Nd4 Bh2 15.Kh1 Be5 16.Nb5 Qb6 17.d4 Bb8 =+.

11.d4 Ne4

12.Bb2 Qf6 13.Nbd2 Nd2 14.Qd2 Rd8 15.Ra1 c5 16.bc6 bc6 17.c4 dc4 +=.

12.c4 dc4 13.Qc2 f5 14.Bc4 Nb6 15.Be2 Nd5 16.Nc3 Nec3 17.Bc3 Bd7 =.

12.Nbd2 Nd2 13.Qd2 Nf6 14.Bb2 c6 15.Ra1 cb5 16.Bb5 Bd7 17.Bd3 Qb6 +=.

12.Qd3 Qf6 13.c4 Rd8 14.Rc1 Kh8 15.Bb2 c5 16.Nc3 Qf5 17.Rd1 Ndf6 +=.

12.Bd3 Qf6 13.c4 Qg6 14.c5 Be7 15.Qc2 b6 16.c6 Ndf6 17.Ne5 Qh5 +/–.

9.Be2 Ne4

10.0–0 Nd6 11.Na3 Bd7 12.Qb1 =.

10.0–0 Nd6 11.Na3 Qe8 12.Qb1 f6 13.d4 Nd7 (13...Ne4 14.Bb2=) 14.c4 dc4 (14...Qh5 15.cd5 ed5 16.Qc2=) 15.Nc4+= Nc4 16.Bc4 Nb6 17.Bd3 Qh5 18.e4 (18.Bc3 Nd5 19.Bd2 Bd6+=) 18...f5 (18...Bd7 19.Rc1 Rc8 20.Bc3+=) 19.ef5 (19.Qc2 fe4 20.Be4 Bd6+=) 19...Bd6 (19...ef5 20.Re1 Bd6 21.Bc3+=) 20.Qb3 Kh8 21.Re1 ef5 22.Bc3 Re8 (22...Bf4 23.d5 Qf7 24.Ne5+=) 23.Qa2 (23.Re8!? Qe8 24.Ng5+=) 23...Re1= 24.Be1 Qe8 (24...f4!?=) 25.Ba5+= Be6 26.Qe2 Qc8 27.Bb6 (27.Ng5 Bg8+=) 27...cb6+/– 28.Qe3 (28.Nd2 Qc1 29.Nf1 Qc8+/–) 28...Kg8 29.h4 Kf8 (29...Bd5 30.Ne5+/–) 30.h5+/– Bf7 (30...h6 31.Nh4+/–) 31.Nh4 (31.Qg5 h6 32.Qf5 Qf5 33.Bf5 Bh5+/–) 31...f4 32.Qe4 (32...Qc1 33.Kh2+/–) 1–0. Woelfelschneider,Peter – Baer,Werner, ETC, 2005.

10.0–0 Nd6 11.Nc3 Nd7 =.

10.0–0 f6 11.d3 Ng5 =.

10.0–0 f6 11.Nd4 e5 12.Nb3 Be6 13.d3 (13.f4 Bd6=) 13...Nd6 (13...Nc5 14.Nc5 Bc5 15.Nc3=) 14.d4 (14.Nc5 Bf7=) 14...Nd7=+ 15.Nc3 c6 16.bc6 bc6 17.Qb1 (17.Na4 Nb7=+) 17...Qc7 18.Qd1 Rb8 19.Qd2 (19.Bg4 Bg4 20.Qg4 f5=+) 19...Nc4 (19...Nb6 20.Nc5 Bc8 21.e4=+) 20.Bc4 dc4 (Black gets strong initiative) 21.Nc1 ed4 22.Qd4 (Opening the d–file gets Black a lot of play) 22...Rd8 (22...Nf8 23.N1e2=) 23.Qd1 (23.Qh4 Nc5=) 23...Ne5=+ 24.Qe2 (24.Qh5!?=+) 24...Ng4–/+ 25.g3 Qa5 26.Bb2 Ba3 27.Nd1? Bb2–+ 28.Nb2 Qc3 29.Rd1 Rb8 30.Na4 Qa3 31.Nc5 Qc5 32.Qf3 Ne5 33.Qg2 Bg4 34.Rf1 Nf3 35.Kh1 Qf5 (36.e4 Qh5–+) 0–1. Hasler,Ueli – Grimm,Wolfgang (1835), CiF, 2005.

10.0–0 Bf6 11.Bf6 Qf6 +=.

10.d3 Nc5 11.0–0 =.

10.d3 d4?? 11.de4+– e5 12.ed4 Nd7 13.0–0 ed4 14.Qd4 Nf6 15.Bc4 b6 16.e5 Nh5 17.Qe4 Be6 18.Nc3 g6 19.Rd1 Qc8 20.Nd5 Bc5 21.Bd4 Re8 22.Bc5 bc5 23.Ng5 (23...Bf5 24.Qh4+–) 1–0. Schirmer,Michael – Grimm,Wolfgang, DESC, 2005.

10.d3 Nd6 11.c4 dc4 12.dc4 Nd7 13.0–0 b6 14.Qc2 Bb7 15.Nbd2 Bf6 16.Bd3 Ba1 (16...h6 17.Rd1+=) 17.Ra1 (< 17.Bh7 Kh8 18.Ra1 f5 19.Bf5 ef5–/+) 17...f5 18.Qb2 (18.Ra7 Qf6+=) 18...Kf7 (18...Qe7 19.Ra7+=) 19.Ra7+= Qf6 20.Qc2. PeterRs – winugly123, ChessWorld.net, 2008.

10.d3 Nd6 11.c4 Bf6 12.Nbd2 Ba1 (12...Re8 13.0–0+=) 13.Qa1+= dc4 (13...f6 14.Qb2+=) 14.dc4 f6 (14...Nd7 15.0–0+=) 15.c5 (White gets the initiative) 15...Nf7 16.0–0 Qd5 (16...Qe7 17.Rc1 Nd7 18.Qc3+/–) 17.Rc1+/– Ne5 18.Nd4 Nf7 (18...g5 19.Qa5 b6 20.Qa7+–) 19.Qa7 e5 20.N4b3 (20.N4f3 Be6+–) 20...Be6 21.Bc4 Qd7 22.Be6 Qe6 23.Qb7 Rc8 24.Ra1 Qd7 (24...Qe8 25.Ra7+–) 25.c6 Qe8 26.Nc4 f5 27.Nc5 f4 28.Rd1 Rd8 29.Rd8 (better is 29.Rc1 Rc8 30.e4+–) 29...Qd8 30.h3 fe3 31.fe3 (31.Ne3?! Nd6 32.Qa8 Nb5+–) 31...Ng5 32.b6 Nh3 33.gh3 Qd1 34.Kf2 Qc2 35.Kf3 (better is 35.Kg3 Qg6 36.Kf3 Nc6 37.Qc8 Kf7 38.bc7 Qf6 39.Ke2 Ne7+–) 35...Qd1 36.Ke4 Qh1 37.Kd3 Qf1 38.Kc3 Qc1 39.Kb3 Qd1 40.Kb2 Qe2 41.Ka3 Qc4 42.Qb8 Kf7 43.Qc7 Kg6 44.Qd6 Kf7 45.c7 Qc1 46.Kb4 Qb2 47.Ka5 Qa1 48.Na4 Qe1 49.Ka6 Qf1 50.Kb7 Qf3 51.Kb8 Qh3 52.c8Q (52...Qc8 53.Kc8 g5 54.b7 Kg7 55.b8Q h5 56.Qbc7 Kg8 57.Qdd8#) 1–0. Bonetti,Shane – Jonsson,Gudbrandur, ETC, 2004.

10.0–0 Qe8

11.d3 Nd6 12.c4 Nd7 13.Nbd2 Nc5 14.Qc2 dc4 15.dc4 f6 16.Bd4 b6 (16...Nf5 17.Bc3+=) 17.Bc5+/– bc5 18.Nb3 Nb7 19.Ra1 Bd6 (19...c6 20.Ra7+=) 20.Ra8 Qh5 21.Ra7 g5 (21...Rd8 22.h3 e5 23.Ne1+–) 22.h3 g4 23.hg4 Qg4 24.e4 (24.Nh2 Qg7+/–) 24...Qh5 25.g3 Kh8 (25...Qg6 26.Qd3+/–) 26.Ne5 Qh6 (26...Qe5?? 27.f4 Qd4 28.Nd4 cd4 29.Bd3+–) 27.Ng4 Qg6 28.Qd3 h5 29.Nh2 (29.e5 Qd3 30.Bd3 hg4 31.ed6 cd6=) 29...h4+= 30.g4 (30.e5 Qd3 31.Bd3 Be5 32.gh4 Rg8 33.Kh1 Bd4+=) 30...Qg5 31.Qh3+= f5 32.Nf3 fg4 33.Qh4 Qh4 34.Nh4 Rg8 35.Ng2 Kh7 36.Ra8 Be5 37.Bg4 Rg4 38.Rc8 Rg8 39.Rg8 Kg8 40.f4 Bd4+/– 41.Kf1 Nd6 42.Nd2 Bc3 43.e5 Bd2 44.ed6 cd6 45.Ke2 Ba5+/– 46.Ne3 Bc7 47.f5+– d5 48.fe6 d4 49.Nd5 Be5 50.Kd3 Kf8 51.Ke4 Bd6 52.Kf5 Ke8 53.b6 d3 54.Kf6 d2 55.Nc3 Be7 56.Kg6 Bh4 57.b7+– Bg3 58.Kf6 Bh4 59.Ke5 Bg3 60.Kd5 Ke7 61.Kc5 Ke6 62.Kc6 Be5 63.Nd1 Bd6 64.c5 Bb8 65.Kb6 Kd7 66.c6 Kd6 67.Kb5 Bc7? 68.Nc3 Ke6 69.Kc5 ½–½. Dopper,Johan – de Boer, corr, 1992.

11.d3 Nd6 12.c4 Nd7 13.Nbd2 Nc5 14.Qc2 dc4 15.dc4 f6 16.Bd4 b6 17.Bc5+/– bc5 18.Nb3 (18.Ne4 Ne4 19.Qe4 f5+=) 18...Nb7 (18...c6 19.Nc5 cb5 20.Nd4+/–) 19.Nfd2 (19.Rb1 Bd6+/–) 19...f5 (19...c6 20.Ra1+=) 20.Bf3+/– g5 (20...Qg6 21.Qa2 e5 22.Bd5 Kh8 23.Ra1+/–) 21.Bc6 (21.Ra1!? Nd8+/–) 21...Qh5+/– 22.Re1 (22.Ra1 Nd8+/–) 22...Nd8 23.Ba8 Nf7 (23...Bd6 24.Nf1+/–) 24.e4 (24.Nf1 Rd8+/–) 24...Bd6+= 25.Nf1 f4 26.f3 (26.Rd1 Ne5+=) 26...g4= 27.Qe2 (27.Nfd2 g3 28.h3 Be5=) 27...gf3 28.Qf3 (28.gf3 Kh8=) 28...Qh4 (28...Qg6 29.Nfd2 Ne5=) 29.Qf2 (better is 29.Qe2!?+=) 29...Qf2=+ 30.Kf2 Ne5 31.Rd1 (31.Ke2 Bd7 32.Ra1 Nc4–/+) 31...Nc4 32.Bc6 (32.Nfd2 Nb6 33.Bc6 c4–/+) 32...Ne5 33.Nfd2 (33.Nbd2 c4–/+) 33...c4 (33...Nc6?! 34.bc6 Ba6 35.Rc1=+) 34.Na5 (34.Na1!?–/+) 34...c3–+ (34...Nc6?! 35.Nc6 c3 36.Nc4 Bc5 37.Ke2=) 35.Ndb3 f3 (35...c2 36.Rd2 f3 37.Kf1–+) 36.gf3 Rf3 37.Kg2 c2 (38.Rd2 Rc3–+) 0–1. Grund,Karl – Podgorny,Jiri, corr ICCF EU–M–279, 1972.

11.d3 Nd6 12.c4 Nd7 13.Nbd2 Nc5 14.Qc2 dc4 15.dc4 f6 16.Bd4 b6 17.Bc5 bc5 18.Bd3 f5 19.Ra1 Bb7 20.Ra7 Qb8 21.Qa4 Bf6. Grund.

11.d3 Nd6 12.c4 Nd7 13.Nbd2 Nc5 14.Qc2 dc4 15.dc4 f6 16.Bd4 Nf5 17.Bc5 Bc5 18.Nb3 Be7. Grund.

11.d3 Nd6 12.c4 Nd7 13.Nbd2 Nc5 14.Qc2 dc4 15.dc4 f6 16.Bd4 Nf5 17.Bc5 Bc5 18.Bd3 +=.

8.Nf3 c5

9.c4 Ne4 10.Be2 0–0= 11.0–0 Nd7 (11...dc4 12.Bc4 Nd6 13.Be2=) 12.d3 (12.Qc2 Nd6=) 12...Nd6 (12...Nef6 13.Qc2=) 13.Nbd2 b6 14.Ne5 (14.Qc2 Bf6=) 14...Ne5 15.Be5 Bb7 16.Bf3 f6 (16...Bf6 17.d4=) 17.Bc3 Qa8 (17...Qd7 18.Qe2=) 18.Qa1 (18.Qc2 Qe8=) 18...Qa1 (18...e5 19.Rd1=) 19.Ra1+= Ra8 (19...Kf7 20.Bh5 g6 21.Bf3=) 20.Ra8 Ba8 21.g4 (21.d4 cd4 22.Bd4 Bd8=) ½–½. hal1958 – ggaarrii, playchess.de, 2003.

9.c4 Ne4 10.Bg7!? Rg8 11.Bb2 +/–.

9.bc6 bc6 10.Be2 0–0 11.0–0 c5 12.c4 Nc6 13.cd5 (13.d3 d4=) 13...ed5=+ 14.d4 (14.d3 Re8=+) 14...c4 15.Nbd2 Bf5 16.Ne5 Qc7 17.Nc6 Qc6 18.Bc3 Re8 19.Nf3 Bd6 (19...Ne4 20.Qa1–/+) 20.Re1 (20.Ne5 Qc8=+) 20...h6 (20...Ne4 21.Qc2–/+) 21.Qc1 Rb8 22.Nh4 (22.Ne5 Qe8 23.Qa1 Ne4–/+) 22...Bh7 (22...Rb1 23.Qd2 Ne4 24.Qc2 Nc3 25.Qc3–+) 23.Bb2 Qb6 24.Ba3 Bb4 (24...Qd8!? 25.Bb2 Ne4–/+) 25.Bb4=+ Qb4 26.Nf3 (26.Qa1 Rc8=+) 26...Ne4 27.Bd1 Nc3 28.Bc2 Bc2 29.Qc2 Qb2 30.Qb2 Rb2–/+ 31.Kf1? Ne4–+ 32.Rc1 Nf2 33.h3 Ne4 34.Ne5 Ng3 35.Ke1 Rg2 36.Ng4 Re2 37.Kd1 h5 (38.Ne5 Re3–+) 0–1. Rosner,Dirk – Zorr, corr DDR–ch I720, 1988.

9.bc6 bc6 10.Be2 Nbd7 11.0–0 0–0 12.Bf6 Nf6 (< 12...gf6 13.d4+=) 13.c4 Ba6 14.cd5 Be2 15.Qe2 cd5 16.d4 Qd6 (16...Qc7 17.Nbd2=+) 17.g3 (17.Rc1!?=) 17...Rc8 18.Ne5 h6 (18...Qc7 19.Nd2=+) 19.Qd2 (19.Nd2 Rc2=+) 19...Ne4 20.Qa5 Bd8 (20...Bf6 21.f3 Ng5 22.f4=+) 21.Qa3 Qc7 22.Nd3 Be7 23.Qa4 Qc4 24.Qc4 dc4 25.Nf4? (25.Rc1 Bd6=+) 25...Bb4 (better is 25...c3–+) 26.f3 Nd2 27.Nd2 Bd2 28.Ne2?? (better is 28.Kf2!?–/+) 28...c3 (28...Be3 29.Kg2 c3 30.Rd1–+) 29.Rd1? (better is 29.e4 c2 30.Kg2–+) 29...f6 (better is 29...Be3!? 30.Kg2 c2 31.Rd3–+) 30.Kf1? (better is 30.Kf2–/+) 30...Be3–+ 31.Rd3 Bd2 32.h3 g5 33.g4 Kg7 0–1. tanto (1730) – johnb (2260), net–chess.com, 2003.

9.Be5 Nbd7 =.

9.c4 0–0

10.d4 =.

10.Be2 dc4 11.Bc4 b6 12.0–0 Bb7 13.d3 Nbd7 14.Nbd2 h6 (15.Qc2 Qc7=). pcmvr (2225) – pushtiu (2160), net–chess.com, 2006.

10.Be2 Nbd7 11.0–0 dc4 12.Bc4 b6 13.d3 Bb7 14.Nbd2 Qc7 15.e4 Ng4 16.Qe2 Bd6 17.g3 Nge5 18.Bb3 Rd8 19.Ne1 Be7 20.f4 Ng6 21.Nef3 Nf6 22.Ng5 (22.f5 ef5 23.ef5 Nf8+=) 22...h6 23.Nh3 Nf8 24.Nf3 Ne8 25.Ne5 f6 (25...Nd6 26.f5 ef5 27.Nf7 Nf7 28.Rf5+–) 26.Nc4= Qd7 27.Bc2 (27.Nb6? Qb5 (27...Qd3?! 28.Qd3 Rd3 29.Bc2=) 28.Be6 Ne6–+) 27...Qb5 28.Rb1 Qa6 29.Nb6 Nd6 30.Nc4 Nb5 31.Bb3 ½–½. Teichmann,E – Rujevic,M, Melbourne, 1998.

10.Be2 Nbd7 11.0–0 dc4 12.Bc4 Nb6 13.Na3 (13.d3 Nfd7=) 13...Nfd5 (13...Nc4 14.Nc4 Bd7 15.Qb3=) 14.Qb3 Qc7 (14...Nc4 15.Nc4 Qd7 16.d4=) 15.Bb2 (15.e4 Nf6 16.Re1 Nfd7=) 15...Rd8 16.Rc1 Qb8 (16...Nc4 17.Nc4 f6 18.d4=) 17.d4 (17.Be5 Bd6 18.d4 cd4 19.Bd4 Qc7+=) 17...Nc4 (17...cd4 18.Bd4 Qc7 19.Bb2 Nc4 20.Nc4+=) 18.Nc4+= b6 19.dc5 Bc5 (19...bc5 20.Be5 Qa7 21.b6+=) 20.Be5 (20.e4 Nc7+=) 20...Qb7 21.Bd4 Nb4 (better is 21...Bd7!?+=) 22.Nb6!+/– Bb6 (22...Qb6 23.Rc5) 23.Qb4 Bd4 24.Nd4 (White launches an attack) 24...Qd5 (24...Re8 25.Qd6+–) 25.f3 (25.Qe7 Rf8+–) 25...Qg5 (better is 25...Bd7+–) 26.f4 Qg4 (26...Qh5 27.Qe7 Rf8 28.Qc7+–) 27.Qe7 Rf8 28.b6 e5 29.Qe5 (29.h3 Qd7 30.Qd7 Bd7 31.fe5 Rb8+–) 29...Bb7 30.Qg5 Qg5 31.fg5 Ra8 (31...Rb8+–) 32.Rc7 Ra1 (32...Rb8 33.Nb3 Ba6 34.Nc5 Rb6 35.Na6+–) 33.Kf2 Ra2 (33...Ba6 34.Ra7 h5 35.Kg3+–) 34.Ke1 Ba6 35.Ra7 (35...h5 36.b7 Ra1 37.Kd2 Ra2 38.Kc3 Ra3 39.Kb4 Bb7 40.Ka3 Bg2 41.Nf5+–) 1–0. Gerding,T – Fuss,B, 1982.

10.Be2 Nbd7 11.0–0 dc4 12.Bc4 Qc7 13.Qc2 =.

9.c4 dc4

10.Bc4 Nbd7

11.0–0 Nb6

12.Be2 0–0

13.Qb3 Qd5 14.Qc2 Qe4 15.Rc1 Bd7 16.Bf6 Qc2 17.Rc2 gf6 18.Ra2 Ra8 19.Ra8 =.

13.Qc1 Qd5 14.d4 Bd7 15.Nc3 Qf5 16.Ne5 cd4 17.ed4 h6 18.Bd3 Qh5 19.Qf4 =.

13.Qc2 Qd5 14.Bf6 Bf6 15.Rc1 Be7 16.Nc3 Qd8 17.Ne4 Nd7 18.d4 cd4 19.Nd4 +=.

13.Qc2 Nbd5 14.d4 b6 15.Rd1 Bb7 16.e4 Nb4 17.Qb2 Qa8 18.e5 Nfd5 19.dc5 =.

13.Qc2 Nfd5 14.d4 Qc7 15.Rc1 c4 16.e4 Nb4 17.Qd2 f5 18.ef5 ef5 19.Na3 +=.

13.Qc2 Nbd7 14.d4 cd4 15.Bd4 Bd6 16.Nbd2 e5 17.Nc4 Qc7 18.b6 Qb8 19.Nd6 +=.

13.Qc2 Nfd7 14.d4 Nd5 15.dc5 Nc5 16.Rd1 Qa5 17.Bd4 b6 18.Nc3 Nc3 19.Bc3 +=.

13.Nc3 Re8 14.Bb2 Bd6 15.d4 cd4 16.Qd4 e5 17.Qh4 Qe7 18.Rd1 Bf5 19.e4 =.

13.d4 c4 14.Nbd2 Bd7 15.Qb1 Qe8 16.Nc4 Bb5 17.Nd6 Bd6 18.Bb5 Qe7 19.e4 +=.

12.Be2 Qd5

13.Qc2 0–0 14.Bf6 Bf6 15.Rc1 Be7 16.Nc3 Qd8 17.Ne4 Nd7 18.d4 cd4 19.Nd4 +=.

13.Nc3 Qd8 14.Na4 Nbd5 15.Qc2 b6 16.d4 cd4 17.Bd4 Bb7 18.Rd1 Qb8 19.Ne5 +=.

13.d4 Nbd7 14.Nc3 Qd6 15.Qc2 0–0 16.Rd1 cd4 17.Ne4 Ne4 18.Rd4 Qb6 19.Re4 +=.

13.Be5 Qd8 14.d4 Nbd7 15.dc5 Bc5 16.Qc2 0–0 17.Rd1 Qe7 18.Bd4 b6 19.Ne5 +=.

13.Ne5 Nbd7 14.Bc4 Qd6 15.Nd7 Bd7 16.d4 cd4 17.Qd4 Qd4 18.Bd4 Bd6 19.Bf6 +=.

12.Be2 Nbd5

13.Qc2 0–0 14.d4 b6 15.Rd1 Bb7 16.e4 Nb4 17.Qb2 Qa8 18.e5 Nfd5 19.dc5 =+.

13.Nc3 b6 14.d4 Bb7 15.dc5 Bc5 16.Nd5 Bd5 17.Qc2 Qe7 18.Rd1 Be4 19.Qa4 +=.

13.d4 b6 14.dc5 Bc5 15.Qd3 0–0 16.Rd1 Bb7 17.Nc3 Qe7 18.Na4 Bb4 19.Bd4 =.

13.d4 cd4 14.Bd4 0–0 15.Qc2 Bd6 16.e4 (White gets the initiative) 16...Nb4 17.Qb2 Ne4 18.Bg7 Re8 19.Bd4 Qe7 (19...b6 20.Rd1+=) 20.Nbd2 Nd2 21.Qd2 e5 22.Bc3 Bf5 (22...Rd8!?+=) 23.Rd1+/– (23...Rc8 24.Qd6 Qd6 25.Rd6 Rc3 26.Ne5+/–) 1–0. mrkt – arrakis, internet, 2005.

13.Be5 0–0 14.Nc3 b6 15.Nd5 Nd5 16.Bc4 Bb7 17.d4 cd4 18.Qd4 Nf6 19.Ra1 +=.

13.Ne5 Qa5 14.Nc3 0–0 15.Qc1 Qc7 16.d4 Bd6 17.f4 Ne3 18.b6 Qe7 19.Rf3 –/+.

12.Be2 Qd7

13.Qc1 Nbd5 14.d4 b6 15.dc5 Bc5 16.Qc4 Qe7 17.Nc3 Nc3 18.Bc3 Bb7 19.Qh4 +=.

13.Qc2 Nbd5 14.d4 b6 15.dc5 Bc5 16.Rd1 Qe7 17.Be5 0–0 18.Nc3 Bb7 19.Nd5 =.

13.d4 c4 14.Nbd2 Qb5 15.Ne5 Qa4 16.Qa4 Na4 17.Ndc4 Nd5 18.Rc1 0–0 19.Nd2 +=.

13.Ne5 Qd8 14.d4 Qc7 15.dc5 Bc5 16.Qd2 0–0 17.Rc1 Qe7 18.Qc2 Bd6 19.Bd4 +=.

13.Bf6 Bf6 14.Qc2 Be7 15.Rd1 Nd5 16.Nc3 Qc7 17.Nd5 ed5 18.e4 Qd6 19.ed5 +=.

12.Be2 Bd7

13.Qb3 0–0 14.d4 c4 15.Bc4 Nc4 16.Qc4 Qa5 17.Nc3 Rc8 18.Qb3 Bb4 19.Na2 =.

13.Qc1 Nbd5 14.Nc3 Qc7 15.Rd1 0–0 16.Na4 Rc8 17.Be5 Bd6 18.d4 c4 19.Nc5 =.

13.Qc2 Nbd5 14.d4 Qa5 15.Nc3 Nb4 16.Qd2 cd4 17.Nd4 0–0 18.e4 Qb6 19.e5 +=.

13.Nc3 0–0 14.d4 c4 15.Ne5 Qc7 16.Qc2 Bd6 17.Bf3 Ra8 18.Rb1 Be8 19.Bb2 =.

13.Ne5 0–0 14.d4 c4 15.Nc3 Nfd5 16.Qc2 Qc7 17.Rb1 Ra8 18.Bf3 Bd6 19.Bb2 =.

12.Be2 Nbd7

13.Qa4 Qc7 14.d4 0–0 15.Rd1 b6 16.dc5 Bc5 17.Qh4 Bb7 18.Rc1 Ra8 19.Nbd2 =.

13.Qb3 b6 14.Rd1 Bb7 15.Nc3 0–0 16.d4 Qc7 17.Qc2 Bd6 18.h3 cd4 19.Rd4 =.

13.Qc1 b6 14.d4 Bb7 15.Rd1 0–0 16.dc5 bc5 17.Bf6 Bf6 18.Qc2 Qc7 19.Nbd2 =.

13.Qc2 0–0 14.d4 b6 15.dc5 Bc5 16.Ne5 Ne5 17.Be5 Nd5 18.Nc3 Bb7 19.Bf3 =.

13.d4 Qc7 14.Qc2 0–0 15.Bd3 Rd8 16.Rc1 b6 17.Nbd2 Bb7 18.e4 h6 19.Nc4 =.

8.Nf3 c6

9.Nc3 0–0 10.Be2 Bd7 11.0–0 Qb6 12.Ne5 Be8 13.Qb1 d4 (13...Qc7 14.Nf3=) 14.Nc4 (14.bc6!? Qb1 15.Nb1 Nc6 16.ed4+=) 14...Qd8+= 15.ed4 Qd4 16.Na4 Qa7 17.Ncb6 Bd8 18.Bd4 cb5 19.Bb5 Nc6 (19...Qa5 20.c4=) 20.Bc6 (20.Bc5 Ne7 21.Be7 Bb5 22.Bd8 (22.Qb5?! Be7 23.d3 Rd8=) 22...Ba4 23.Be7+/–) 20...Bc6= 21.Nc3 Re8 22.Nb5 (22.Re1 e5 23.Bc5 Qa5=) 22...Qa6 (22...Qa5 23.Nc3–/+) 23.Nc3 (23.Nd6 Ne4 24.Nbc4 Bg5=) 23...e5+= 24.Bc5 (24.Be3 Bb6 25.Qb6 Nd5 26.Nd5 Bd5=) 24...Bb6 (24...Re6 25.Qb2 Bb6 26.Bb6 Qc4=) 25.Qb6 Qb6 26.Bb6 Nd5 27.Nd5 Bd5 28.Re1 e4 29.f3 f5 30.d3 Re6 31.Bf2 ed3 32.cd3 Re1 33.Be1 Kf7 34.f4 Ke6 35.Bb4 b6 36.Kf2 Bb7 37.g3 Kd5 38.Ke3 Kc6 39.Kd4 Kb5 40.Kc3 Bd5 41.Be7 g6 42.Kd4 Bf3 43.Ke5 Kc6 44.d4 Kd7 45.Bb4 Kc6 46.Bf8 Be4 47.h4 Bf3 48.Ke6 Be4 49.Be7 Bd5 50.Ke5 Bc4 51.h5+= Kd7 52.hg6 hg6 53.Bb4 Be2 54.d5 Bc4 55.d6 Be2 56.Kf6 Bh5 57.Kf7 g5 58.Kf6 gf4 59.gf4 Bg4 60.Ke5 Bh3 61.Kd4 Bg2 ½–½. Fournier,Frederic – Jauneau,David, Partie Libre, 1995.

9.c4 0–0 10.Qc2 =.

9.c4 0–0 10.Be2 cb5 11.cb5 Bd7 12.Bd4 Qa5 13.Nc3+= (13.Qb3 Ne4 (13...Qb4 14.Qb4 Bb4 15.Bc3 Rc8 16.0–0 Bd6 17.Be5 Be5 18.Ne5 Ne4; 13...Rd8 14.Nc3 Be8 15.0–0 Nbd7 16.Rc1 Bd6 17.Na4 Ra8 18.Ra1 Qb4; 13...Be8 14.0–0 Nbd7 15.Rc1 Ne4 16.Nc3 f5 17.Qb2 Qa3 18.Qa3 Ba3; 13...Rc8 14.0–0 Be8 15.Nc3 Nbd7 16.Qb2 Ra8 17.h3 Bd6 18.b6 Nc5; 13...h6 14.0–0 Rc8 15.Nc3 Ne4 16.Rc1 Bb4 17.g3 Be8 18.Rc2 Bc3) 14.0–0 Bc5 15.Rc1 Rc8 16.Bd3 Bd4 17.Rc8 Bc8 18.ed4 Bd7) 13...Bb4 (13...Ne4 14.0–0+= Rc8 15.Qb3 f5 16.Ne4 fe4 17.Ne5 Bd6 18.Qb2 Qb4; 13...Rc8 14.0–0 Ne4 15.Qb3 h6 16.Rc1 Bb4 17.g3 Be8 18.Rc2 Bc3) 14.0–0 (14.Qb1 Bc8+/– 15.0–0 Nbd7 16.Qb2 Qa3 17.Qa3 Ba3 18.b6 Bc5) 14...Ne4+= (14...Bc8 15.Qb3 Nbd7 16.Qb2 Qa3 17.Qa3 Ba3 18.b6 Bc5) 15.Qb3 Nd6?? (better is 15...Bc3 16.Bc3 (16.dc3 Rc8 17.Rc1 f6 18.Bd3 Nc5) 16...Nc3 17.dc3 Rc8+= 18.c4 Rc5; 15...Bc5 16.Bc5 Nc5 17.Qb2 Rc8 18.Ra1 Qc7) 16.Nd5!+– ed5 17.Ra1 Qc7 (17...Ba3 18.Ra3 (18.Qa3?! Qa3 19.Ra3 Bb5 20.Bb5 Nb5+/–) 18...Qc7 19.Ra1+–) 18.Qb4 Nc4 (18...Ne4 19.Be5 Qc2+–) 19.d3 Nd6 (19...Nb6 20.Be5 Qd8+–) 20.Be5 (20.Be5 Bb5 21.Bd6+–) 1–0. Anonymous – qoloq, internet, 2011.

9.c4 0–0 10.Be2 dc4 11.Bc4 Bd7 12.Nc3 cb5 13.Nb5 Qa5 14.Qb1 Bc6 (14...Bb4 15.Bf6 gf6 16.Nbd4=) 15.0–0 Bf3 16.gf3 Nc6 (16...Qd2 17.Bd3 Qb4 18.Bf6 Qb1 19.Rb1 Bf6 20.Nd6=) 17.Bf6 (17.d4 Rc8 18.Rc1 Bb4+=) 17...Bf6 (17...gf6 18.d4+=) 18.d4 Be7 (18...Ra8 19.Rc1+=) 19.Rc1+/– Rc8 (19...Ra8 20.f4+=) 20.Bf1 (20.Bd3 g6+=) 20...Bb4 (20...Bf8 21.Kh1+=) 21.f4+/– g6 22.Qe4 (22.Be2 h6+=) 22...Rd8 23.Qd3 Ne7 24.Qd1 Nd5 25.Ra1 Qb6 26.Qa4 Be7 27.Rc1 Qa6 28.Qc2 Qa5 29.Rb1 Qa8 30.Bg2 Rc8 31.Qb3 b6 32.h3 Qb7+= 33.Ra1 Qc6 34.Bf3 Bh4 35.Ra2 h6 36.Kh2 Kg7 37.Kg2 h5 38.Na7 Qc4+= 39.Qb2 Ra8 40.Ra3 Be7 41.Ra1 Kf8 42.Be4 Kg7 43.Rc1 Qa4 44.Bd5 Ba3 45.Qc2 Qc2 46.Rc2 Ra7 47.Bc6 Rc7 48.Ra2 Rc6= 49.Ra3 b5 50.Rb3 Rb6 51.Kf3 Kf6 52.Rb4 Ke7 53.Ke2 Kd6 54.Kd3 Kc6 55.Rb3 Ra6 56.Ke4 h4 57.Ke5 Ra5 58.e4 b4= 59.Kf6 Kb5 60.Kf7 Kc4 61.Rb1 b3 62.e5 Rd5 63.Ke6 Rd4 64.f5 gf5 65.Kf5 Rd2 66.f4 Rd3 67.e6 Re3? 68.Kf6 Rh3 69.Re1 Rg3 70.e7 Rg8 71.f5 h3 72.Kf7 Rb8 73.e8Q Re8 74.Ke8 b2 75.f6 Kb3 76.f7 (76...Ka2 77.f8Q b1Q 78.Qf7 Qb3 79.Qa7 Qa3 80.Re2 Kb3 81.Re3 Kb2 82.Qa3 Kc2 83.Qc3 Kb1 84.Re1 Ka2 85.Ra1#) 1–0. pierre – Kelish, internet, 2006.

9.c4 0–0 10.Be2 Bd7 11.0–0 (11.Nc3!?=) 11...dc4+= 12.bc6 Bc6 13.Bc4 Qc7 (13...b5 14.Be2+=) 14.Be2 (14.Ne5 Bd5 15.Be2 Nbd7=) 14...Nbd7 (14...b5!?+=) 15.Nd4= Ra8 16.Nc3 Bd6 17.h3 Bh2 18.Kh1 Be5 19.Nc6 Qc6 (19...bc6 20.Qc2+=) 20.d4 Bb8 (20...Bc7 21.Qb1+/–) 21.Qb1+/– Nd5 22.Nd5 ed5 23.Rc1 Qb6 24.Qc2 (24.Rc8!? Nf8 25.Bb2+/– (25.Qb6?? Ra1 26.Qb1 Rb1 27.Rc1 Rc1 28.Bd1 Rd1)) 24...Bd6+= 25.Qf5 Nf6 26.Qc2 g6 (26...Nd7 27.Bc3+=) 27.g3 (27.Bd3 Kg7+=) 27...Kg7 (27...Qc6 28.Qc6 bc6 29.Kg2=) 28.Bf3 (28.Kg2 Qd8+=) 28...Qd8 29.Qb3 (29.Kg2 b5=) 29...Qd7 30.Kg2 Ra3 31.Qb6 Ra6 32.Qb3 Ra3 33.Qb6 Ra6 34.Qb3 Ra3 ½–½. Bouvier,Clement (1785) – Maulana,Kahfi (1765), Elancourt France, Open, 2010.

9.c4 dc4 10.Bc4 0–0 11.0–0 cb5 12.Bb5 Bd7 (12...Bd6 13.Qb3=) 13.Be2 Nc6 (13...Bc6 14.Bf6 Bf6 15.d4=) 14.Nc3 (14.Qb3 Na5 15.Qc2 Qc8=) 14...Nd5 (14...Qb6 15.d4=) 15.Nd5+= ed5 16.Qb3 Bc8 17.Nd4 Na5 (17...Bf6 18.Nc6 bc6 19.Qc2+=) 18.Qb1 (18.Qb5 b6+/–) 18...Nc4 (18...Bd6 19.Rc1+=) 19.Bc4 dc4 20.Qb5 Bf6 (20...Bd6 21.Rc1+=) 21.Qc4+/– Bd4 (21...Qd7 22.d3+/–) 22.Bd4 Be6 23.Qc3 Bd5 24.e4 Be4 25.f3 Bf5 26.Bg7 Qb6 27.Bd4 Qg6 28.Qe3 f6 29.Re1+– h5 30.Qb3 Qf7 31.Qb5 Qd7 32.Qc4 Kg7 33.Qc5 Re8 34.Re3 Kg6+/– 35.Qb6 Re6 36.Re6 Qe6 37.Qe6 Be6 38.Bb6 Kf5 39.Kf2 h4 40.Ke3 Bd5 41.d4 Kg5 42.g4 hg3 43.hg3 Kf5 ½–½. De Visser,Arno – Kaan, 1984.

9.c4 dc4 10.Bc4 cb5 11.Bb5 Bd7 12.Be2 =.

9.c4 Nbd7 10.Be2 dc4 (10...0–0 11.cd5 ed5 12.bc6 bc6 13.0–0=) 11.bc6 bc6 12.Bc4 Nb6 (12...0–0 13.0–0=) 13.Be2 0–0 (13...c5 14.Qc2=) 14.0–0 (14.Qc2 c5+=) 14...Bb7 (14...c5 15.d4=) 15.d3 (15.Bf6 Bf6 16.Qc2 e5=) 15...Nbd5 16.Nbd2 Ng4 (16...c5 17.Nc4=) 17.Qb3 (17.Qc2 Bb4+=) 17...Qa8 (17...Bb4 18.Ne4+=) 18.h3 (18.Rb1 Ba6+=) 18...Bf6 (18...Ngf6 19.Be5+=) 19.d4 (19.hg4?! Ba1 20.d4 c5 21.dc5 Rb8+=) 19...Nh6 20.Bb2 Qc8 21.Ra1 Qc7 22.Ra7 Rb8 23.e4 (better is 23.Bd3+/–) 23...Nf4? (better is 23...Nb6 24.Ba6 Bd8+–) 24.Ba6+– Kh8? (24...c5 25.Rb7 Rb7 26.Bb7 Ne2 27.Kh1 Nd4+–) 25.Rb7 Rb7 26.Qb7 Qb7 27.Bb7 Nd3 28.Ba3 Ng8 29.Bc6 Ne7 30.Be8 Kg8 31.e5 Be5 32.de5 Ng6 33.Nc4 f6 34.ef6 gf6 35.Nd6 Kg7 36.Bb5 Nde5 37.Nd4 Nf8 38.Be8 Neg6 39.Ne4 f5 40.Ng5 Nf4 41.Ngf3 h6 42.Bb2 Nd3 43.Ba1 Kf6 44.Nc6 e5 45.Nce5 Ne5 46.Ne5 Ne6 47.Ba4 Nc5 48.Nd7 (48.Nd7 Kg5 49.Nc5+–) 1–0. Beekes,Noud – Zimmermann,Jan Erik, SL–2006–0–00041, 2006.

9.Be2 0–0 10.0–0 c5 11.c4 dc4 12.Qc1 b6 13.Na3 Bb7 14.Nc4 Nbd7 15.Qc3 Ne8 16.Bb2 Bf6 17.d4 cd4 18.Nd4 Nc5 19.Qb4 Nd6 20.Nc6 Bc6 21.Bf6 (worse is 21.bc6 Bb2 22.Qb2 Nc4 23.Bc4 Qc7=) 21...gf6 (21...Qf6 22.bc6 (22.Nd6?! Bd5+=) 22...Nc4 23.Bc4+/– (worse is 23.Qc4 Rc8=)) 22.bc6+/– Nc4 23.Qc4 Qc7 24.Bf3 Ra8 25.Rd1 Ra4 26.Qc3 Kg7 27.Rd4 e5 28.Ra4 Na4 29.Qc4 Nc5 30.Qg4 Kf8 31.Qf5 Kg7 32.Bd5 Nb7 (32...Qa7 33.Qg4 Kh6 34.h3+–) 33.Be4 (33.f4 Nd8 34.g3+/–) 33...Kf8 (better is 33...Nd8!?+/–) 34.Qf6+– (34.Qh7?! Nd8+/–) 34...Qd6 35.Qd6 (35.Qd6 Nd6 36.Bh7+–) 1–0. pcmvr – agostinhoarruda (2570), net–chess.com, 2016.

9.Be2 Bd7 10.bc6 bc6 11.0–0 c5 12.c4 Nc6 13.Ne5 0–0 14.Nd7 Qd7 15.Na3 Na5 (15...Ra8 16.Nb5=+) 16.cd5 ed5 17.Qb1 c4 18.Nc2 Nb3 19.Bc3 Ne4 20.Rd1 (20.Qb2!?=+) 20...Qf5–/+ 21.Bf3 Bh4 (21...Nc3?! 22.dc3 Rd8 23.Nd4 Qb1 24.Rb1=) 22.Nd4 Bf2 23.Kh1 Nd4 24.Bd4 Ng3 25.hg3 Qg5 26.Qb6 Qg3 27.Bf6 Rb8 (27...gf6?! 28.Qf6 d4 29.ed4=+) 28.Qd4 gf6 29.Qf6?? (better is 29.Qg4 Qg4 30.Bg4–+) 29...Rb6!! 30.Qf5 Rh6 31.Bh5 Qh4 32.Qh3 Qh5 33.Rf1 Qg5 34.Rf2 Rh3 35.gh3 c3! (36.dc3 Qe3–+) 0–1. Panek,Tadeusz – Wolanin,M, Gdynia op, 1985.

8.Nf3 Nbd7

9.c4 dc4 10.Bc4 Nb6 11.d3 =.

9.c4 dc4 10.Bc4 Nb6 11.Be2 Bd7 (11...0–0 12.Bf6 Bf6 13.d4=+) 12.Nc3 (12.Bf6 Bf6 13.d4 0–0=) 12...0–0 13.0–0 Qa8 (13...Bd6 14.d4=) 14.Qc2 Rd8 15.Bb2 Be8 (15...Bd6 16.Ra1 Qb8 17.d4+=) 16.Ra1+= Qc8 17.e4 (17.d3 Qd7+=) 17...c5 18.bc6 (18.e5 Nfd5+=) 18...Bc6= 19.Rc1 Qd7 20.d4 Rc8 21.Qd3 (21.Qb3 Qd8 22.Bd3 Bd6=) 21...Bb4 (21...Bd6 22.Ne5 Be5 23.de5 Qd3 24.Bd3=) 22.Ne5+= Qd8 (22...Qd6 23.Nc6 Rc6 24.e5+–) 23.Nc6 Rc6 24.Na2 (24.Nb5 Qc8 25.Ra1 Nc4+=) 24...Rc1= 25.Bc1 Be7 26.Nc3 Qa8 (26...Qd6 27.e5 Qd7 28.ef6 Bf6 29.Be3+–) 27.Qb1 Qa5 28.Bd2 Bb4 29.Qc1 h6 30.f3 Na4= 31.Nb1 Bd2 32.Nd2 Qb6 33.Qc8 Kh7 34.Qc4 Qa5 35.Qc2 g6 36.Kf1 Nc3= 37.Nb3 Qb4 38.Bd3 Nd7 39.h4 h5 40.g4 hg4 41.fg4 Nb5 42.Bb5+= Qb5 43.Kf2 Nf6=+ 44.Nd2 Ng4 45.Kf3 Nf6 46.e5 Qd5 47.Ke3? Ng4–+ 48.Kf4 Qd4 49.Ne4? Ne5 50.Qc7 Nd3 51.Kf3 Ne1 52.Kf4 e5! 53.Kg5 Qe3 54.Kf6 Qf4 55.Ke7 Qe4 56.Kf7 Qf5 57.Ke8 Kh8 58.Qc1 Qe6 (59.Kd8 Nd3 60.Qh6 Kg8–+) 0–1. Behnicke,Eckhard – Abhau,Jochen, Ruhrgebiet VK3–chT, 1995.

9.c4 c6 10.Nc3 0–0 11.Be2 cb5 12.Nb5 (12.cd5 b4 13.de6 bc3 14.ed7 cd2 15.Qd2 Bd7=) 12...dc4 13.Bc4 Nb6 (13...b6 14.0–0=) 14.Be2 Bd7 15.0–0 Nbd5 (15...Bc6 16.Qb1=) 16.Qc2 (16.Be5 Ng4=) 16...Qa5 17.Nbd4 (17.Rb1 Rc8 18.Qb3 Ne4=) 17...Rc8 18.Qb3 (18.Qb2 Qc7=) 18...Rb8 (18...Qb4 19.Qd3=) 19.Bb2 b5 (19...Qb4 20.Ra1=) 20.Ne5 Qa4= 21.Nd7 Qb3 22.Nf6 Bf6=+ 23.Nb3 Bb2 24.Rb1 Bf6 25.Bf3 Nc7 26.Na5 Nd5 27.g3 Rb6= 28.e4 Ne7 29.Be2 b4 30.Nc4 Rb8 31.e5 Bg5 32.f4 Bh6 33.h4 g6 34.g4? Bf4–/+ 35.g5? Nc6 (36.Kf2 Ne5 37.Ne5 Be5–+) 0–1. Johansen,Henning – Hansen,Svend, Copenhagen, 1983.

9.c4 c6 10.cd5 ed5 11.bc6 bc6 =.

9.Be2 c5 10.bc6 Nc6 11.0–0 Ne4 12.d3 Nd6 (12...Nf6 13.Nbd2 Qc7 14.c4 e5 15.Qb3 Rd8 16.Rb1 d4 17.Qb5 de3=) 13.Nbd2 Bf6 (13...Qc7 14.Qb1 b5 15.e4 Bd7 16.Qb3 de4 17.de4 b4=) 14.c3 (14.c4 b5 15.cb5 Nb5 16.Qa4 Nba7 17.Rc1 Ba1+=) 14...Qa5 (14...e5 15.c4 dc4 16.dc4 Qa5 17.Qc2 Bf5=) 15.Nb3 (15.c4 Be7 16.Nb3 Qa7 17.c5 Ne8+=) 15...Qa2 (15...Qa4 16.c4 dc4 17.dc4 Nc4=) 16.Nfd2 (16.Qb1 Qb1 17.Rb1 e5=) 16...Nb5 (16...e5 17.Bf3 Be6=) 17.Qc1 (17.d4 Nd6+=) 17...Be7 (17...e5=) 18.c4 Nc7 19.c5 Na5? (better is 19...e5+=) 20.Qc3+– Bf6? (20...f6 21.Qa5 Qa5 22.Na5 Bc5+–) 21.Qa5 Qa5 22.Na5 e5 23.Rb1 Ne6 24.Ndb3 (24.c6 bc6 25.Nc6 Re8 26.Ne5 Ba6+–) 24...Nd8 25.Bf3 Be6 26.Kf1 g5 27.Ke1 g4 28.Be2 h5 29.f4 gf3 30.Bf3 h4 31.Ke2 Re8 32.Bc3 d4 33.Bb4 de3 34.Nb7 Nb7 35.Bb7 Bg5 36.h3 Rd8 37.c6 Bf5 38.Rd1 Bg6 39.c7 Bh5 40.Bf3 Bf3 41.Kf3 Rc8 42.Bd6 f6 43.Na5 Ra8 44.Nc4 e2 45.Ke2 Ra2 46.Kf3 (46.Kf3 Kg7 47.c8Q+–) 1–0. Tejera Santana,S (1940) – Roque Hernandez,F, Vecindario ESP, 1st Open, 2011.

9.Be2 c6 10.0–0 Qc7 11.c4 e5 12.Qb3 e4 13.Nd4 Ne5 (13...Bd6 14.f4=) 14.Rc1 (14.cd5!? cd5 15.b6+=) 14...Nc4 15.Bc4 Ng4 16.g3 (16.f4 ef3 17.Nf3 dc4 18.Qc4+=) 16...h5?? (16...dc4 17.Qc2 c5=+) 17.Bd5!+– 0–0 (17...cd5 18.Rc7) 18.bc6 Qd6 (18...bc6 19.Be4 c5+–) 19.cb7 Be6 (19...Bd7+–) 20.Be6 fe6 21.Ne6 (21...Qd3 22.Qd3 ed3 23.Rc8+–) 1–0. Hasler,Ulrich – Gusgaard, corr ICCF/III54, 1965.

9.Be2 Bd6 10.0–0 =.

9.Be2 Bd6 10.Nd4 =.

9.g4 0–0 10.g5 Ne4 11.h4 =+.

9.g4 Ng4 10.Rg1= Ngf6 11.Rg7 Rg8 12.Rg8 Ng8 13.Bd3 (13.Ne5 Ngf6=) 13...Nf8 (13...Ngf6 14.Ne5=) 14.Ne5 (14.Bd4 Nf6=) 14...Nf6 (14...Ng6 15.Qf3 Nf6 16.Bd4=) 15.Qf3 (15.Bd4 N8d7=) 15...Ng6 16.Bg6 (16.Bd4 Ne5 17.Be5 c5=) 16...fg6 (16...hg6 17.Bd4=) 17.Bd4 Bd7 18.Nc3 (18.c4 c6=) 18...c5 19.bc6 bc6 20.Na4 Qb8 21.Nb6 Qd6 (21...Qb7 22.d3+/– (22.Ned7?! Nd7 23.Nd7 Qb1 24.Ke2 Kd7=+; < 22.Nbd7 Nd7 23.Qf7 Kd8+/–)) 22.Nbd7 (22.Ned7?! Nd7 23.Nd7 Kd7=) 22...Nd7 23.Qf7 Kd8 24.Nd7 (24.Qg8 Kc7 25.f4 c5+/–) 24...Kd7 25.f4 Kc8 (better is 25...g5!? 26.Be5 Qa3+=) 26.Qh7+– e5 (26...g5 27.fg5 Bg5 28.Qg8 Bd8 29.Bb6+–) 27.Be5 Qe6 28.Kf2 c5 29.Kg3 Kb7 30.Qh3 Qc6 31.c4 dc4 32.Qg2 Qg2 33.Kg2 Kc6 34.e4 Kd7 35.Kf3 Ke6 36.Bc3 Bh4 37.Kg4 Bf2 38.Kg5 (38...Kf7 39.f5 gf5 40.ef5+– (40.Kf5?! Bh4+–)) 1–0. Poley,Vladimir (2290) – Nielsen,Tommy (2250), Gistrup, 1992.

9.c4 0–0=+

10.Qc2 dc4 11.Bc4= Nb6 (11...b6 12.Nc3=) 12.Be2 Bd7 (12...Nbd5 13.0–0+=) 13.0–0 (13.Bd4 Nbd5+=) 13...Qa8 (13...Nfd5 14.Bd4+=) 14.Nc3 (14.Bd4 Nfd5+=) 14...Rc8 (14...Qe8 15.Bd3+=) 15.Ne5+/– Be8 (15...c6 16.Nd7 Nfd7 17.bc6 Rc6 18.Bf3+=) 16.f4 (16.Bb2 Qb8 17.f4 Nfd5+/–) 16...Nbd7 (16...c6 17.bc6 Bc6 18.Bb2+/–) 17.Nf3 (17.Bb2 Qb8+/–) 17...c6 (17...Qa7 18.Bb2+=) 18.bc6+/– bc6 19.Ng5 (19.Bb2 Rb8+/–) 19...h6+= 20.Nge4 (20.Nf3 Rb8+=) 20...Nd5 21.g4 (21.Bb2 Rb8+=) 21...Qa7 (21...Rb8 22.Bb2=) 22.Kg2 (22.Nb5 Qb8 23.Nd4+=) 22...Qe3? (22...Ra8=) 23.Kh1?? (better is 23.Qb2 Nf4 24.Kh1+/–) 23...Qa7 (23...Qh3 24.Nd5 ed5 25.Ng3+=) 24.f5 (24.g5 Nf4 25.gh6 gh6 26.Rg1 Ng6–/+) 24...Nc3 (24...Nb4!? 25.Qb1 e5–/+) 25.Bc3+= e5 26.f6 (26.Ra1 Qc7+=) 26...Nf6 27.Be5 Ne4 28.Qe4 c5 29.Qf5 Qd7 30.Qd7 Bd7 31.Kg2 Be6 32.Bf4 Ra8–/+ 33.Rc1 Ra4 34.Be3 Bg4 35.Bg4 Rg4 36.Kf3 Rh4 37.Bc5 Bc5 38.Rc5 Rh2 39.Rc8 Kh7–+ 40.d4 Kg6 41.Ke4 Re2 42.Kd5 h5 43.Rc6 Kf5 44.Rc5? h4 45.Kc6 Kg4 46.d5 h3 47.d6 h2 48.Rc1 Rd2 49.d7 Kg3 50.Kc7 Kg2 51.d8Q Rd8 52.Rc2 Kg3 53.Rc3 Kg4 54.Rc4 Kg5 55.Rc5 f5 56.Kd8 h1Q 57.Ke7 Qe4 58.Kd6 Qd4 59.Rd5 Qd5! 60.Kd5 f4 61.Ke4 Kg4 62.Kd3 Kg3 63.Ke2 Kg2 (63...Kg2 64.Kd2 f3–+) 0–1. Svitek,Volker – Polak,Petr (2175), Prague Cedok op, 1996.

10.Qc2 c6 11.bc6 bc6 12.cd5 cd5 13.Be2 Qa5 14.Bc3 Qc7 15.Qb2 Bb7 16.Na3 Rb8 17.Nb5 Qc5 18.0–0 Ba6 19.Rb1 Ne4 20.Bd4 Qc6 21.Bf1 Bc5 22.Bg7 f6 23.Bh6 Nd6 24.Nfd4 Bd4 25.Qd4 Nf5 (25...Nb5?! 26.Qg4 Kf7 27.Qg7 Ke8 28.Qh8 Ke7 29.Qh7 Kd8 30.Bg7=; < 25...Bb5 26.Qg4 Kf7 27.Qg7 Ke8 28.d3–/+) 26.Qg4 Kh8 27.Bf4 Rb7 (27...Rb5?! 28.Bb5 Bb5 29.d4=) 28.Qh5 (28.Bd3 Bb5 (28...Rb5?! 29.Bb5 Bb5 30.d4=) 29.Bb5 Rb5–+) 28...Nf8 (28...Bb5 29.Qe8 Kg7 30.g4–+) 29.g4 Ng7 30.Qh6 Bb5 31.Qf6 Kg8 32.d3 Ne8 33.Qd8 Ng6 34.Bg3 Kf7 35.h4 Ba6 36.Ra1 Ne7 37.Qa5 Rb6 38.Be5 Bb7 39.Rc1 Qc1 40.Qb6 Bc8 41.Qb3 Nf6 42.Qa4 Nd7 43.Bd6 e5 44.g5 Nf8 (44...Nf5!? 45.Ba3 Qc3–/+) 45.Be5 Nfg6 46.Qa1 Qa1 47.Ba1 Nh4 48.f4 Nef5 49.Kf2 Nd6 50.Be2 Ba6 51.Be5 Nhf5 52.Bf3 Bb7 53.Bh5 Ke6 54.g6 hg6 55.Bg6 Ne7 56.Bh7 Ndf5 (56...Nc6!? 57.Bg8 Nf7–/+) 57.e4 ½–½. Cottarelli,Franco – Ruhle,Ernst_Olav, corr ICCF TT/6/02/2, 2005.

10.Qc2 Bd6 11.Nc3 +=.

10.Qc2 Re8 11.Bd4 =+.

10.Nc3 Nb6?! 11.Qb3! dc4 12.Bc4 Nc4 13.Qc4.

10.Nc3 Nb6 11.Qb3 dc4 12.Bc4 Qd6 13.Na4 Nc4 14.Qc4 =.

10.Nc3 Nb6 11.Qb3 Qd6 12.cd5 (12.Na4 Nbd7=+) 12...ed5=+ 13.Be2 Qa3 (13...Be6 14.Nd4=+) 14.Qa3= Ba3 15.0–0 (15.Nb1 Be7=) 15...Bf5 16.Nb1 Bd6 (16...Be7 17.Rc1 Nfd7 18.g4=) 17.Be5 (17.Bf6 gf6 18.Nc3 Ra8=) 17...Be5 18.Ne5 Ra8 19.Nc3 Kf8 (19...Ne4 20.Ne4 de4 21.f3=) 20.f4 (20.Rc1 Ke7=) 20...Nfd7 21.Bf3 Ne5=+ 22.fe5 Be6 23.Rc1 Ke8 24.e4 c6 25.bc6 bc6 26.Ne2 Nc4? 27.ed5+– Bd5 28.Rc4! Bc4 29.Bc6 Ke7 30.Ba8 Be2 31.Be4 h6 32.Kf2 Bd1 33.Ke3 f6 34.Bf3 Ba4 35.Kf4 Ke6 36.Bg4 Ke7 37.Be2 Bd7 38.d4+– Ba4 39.Bd3 Bd7 40.d5 fe5 41.Ke5 Ba4 42.Be4 Bd7 43.Bd3?? Ba4 44.Ba6 Bd7 45.Bb7 Ba4 46.Bc6 Bb3 47.d6 Kd8 48.Kf5 Bf7 49.g4 Kc8 50.h4 Kd8 51.g5 hg5 52.hg5 Kc8 53.Ke5 Kd8 54.Bd5 Bh5 55.Ke6 Bg6 56.Bc6 (56...Bh5 57.d7+–) 1–0. Sazonov – Kamenesky, ch–Moscow, 1962.

10.Nc3 Nb6 11.d3 Bd6 =.

10.Nc3 dc4 11.Bc4 Nb6 12.Be2= Nbd5 (12...Qd6 13.e4 Qf4 14.Qc2=) 13.Qb3 Nc3 14.Qc3 Ne8 (14...Bd7 15.0–0=) 15.0–0 Bf6 (15...Bd6 16.e4+=) 16.d4+= g6 (16...Be7!?+=) 17.Bb2 b6 (17...Be7 18.Rc1+/–) 18.Ne5 Be5 (18...Bb7 19.Ba3 Be7 20.Be7 Qe7 21.Ra1+/–) 19.de5+– Bb7 (19...f5+–) 20.Ba3 Qg5 21.f3 h5 (21...f6 22.Bf8 Kf8 23.Qa3 Kf7 24.Rd1 fe5 25.Rd7 Kg8 26.Bc4+–) 22.Bf8 Kf8 23.Rf2 (23.Ra1 Qd8+–) 23...Qe7 (23...Kg8 24.e4+–) 24.Bd3 h4 25.g4 hg3 26.hg3 Kg8 27.e4 Qc5 28.Qc5 bc5 29.Rc2 Kf8 30.Rc5 Ke7 31.g4 Kd7 32.Bc2 Kd8 33.Ba4 Kd7 34.Kf2 Ng7 35.Ke3 Ne8 36.Kf4 Ke7 37.Kg5 Kf8 38.Rc4 Kg7 39.b6! (39…Kf8 40.Be8 cb6 41.Bf7 Kf7 42.Rc7 Ke8 43.Rb7+–) 1–0. Koss,D (1755) – Groebe,K (2720), SSM96, 1996.

10.Nc3 dc4 11.Bc4 e5 12.Qc2 =.

10.d3 dc4 11.dc4 Bd6 12.Be2 =.

10.d3 dc4 11.dc4 Ne4 12.Bd3 Bb4 13.Nbd2 Ndc5 14.Be4 unclear.

10.d3 dc4 11.dc4 Ne4 12.Bd3 Bb4 13.Nbd2 Nd2 14.Nd2 Nc5 15.Bc2 Nd3 16.Kf1 Nf2 17.Kf2 Bd2 18.Bd4 =.

10.d3 dc4 11.dc4 Ne4 12.Bd3 Bb4 13.Nbd2 Ndc5 14.Be4. De Visser,Arno – Zobel, corr ICCF–cup, 1986.

9.Be2 0–0

10.0–0 Nb6 11.d3 c5 12.Nbd2 Bd7 13.c4 Qa8 14.h3 Qa4 15.Qc1 Ra8 16.Bd1?? (16.Be5 Ne8=) 16...Qa3 (better is 16...Qa1 17.Qa1 Ra1–+) 17.Bb2 Qb4 (17...Qd3? 18.Bc2 Qf1 19.Kf1 (19.Nf1?! Nc4 20.b6 Bd8+/–) 19...Nc4 20.Nc4 Bb5 21.Bd3 dc4 22.Bc4+–) 18.Bb3 Na4 19.Be5 d4 20.ed4 cd4 21.Bd4 Nc5 22.Qc2 Ra3?? (better is 22...Nb3 23.Nb3 Ra3+/–) 23.Bc3+– (23.Bc3 Rb3 24.Bb4 Rb4 25.Ra1+–) 1–0. Schnell,Manfred – Graebner,Walter (2045), Hessenliga, 2007.

10.0–0 c5 11.c4 Qc7 12.Qb3 (12.d4 dc4 13.Bc4 cd4 14.Qd4 Rd8=) 12...b6 13.d4 (13.Nc3 Bb7=) 13...Bb7=+ 14.Nbd2 (14.Rc1 Ra8 15.Qb2 dc4=) 14...Ra8 15.Bb2 (15.Rc1 Bd6=) 15...cd4 16.ed4 dc4 (16...Qf4 17.Rc1=+) 17.Bc4 (17.Nc4 Bd5=+) 17...Nd5 18.Ne4. Pietrzak,Janusz – Chyla,M, corr Poland, 1990.

10.0–0 Nc5 11.d3 Bd7 12.c4 c6 13.d4 Nce4 14.bc6 Bc6 15.c5 b6 16.Ne5 Qc7 17.Nc6 Qc6 18.cb6 (18.f3 Qa8 19.fe4 Qa1+=) 18...Qb6 19.Nd2 Bb4 20.Ne4 Ne4 21.f3 (21.Qc2 Rb8=) 21...Nc3 22.Qc2 Rc8 23.Bd1 (23.Bd3 g6=) 23...e5 (23...Qc7 24.Bc3 Qc3 25.Qf2+=) 24.Qd3 (better is 24.Qf5!? Re8 25.Bc2+=) 24...ed4–/+ (24...Nd1?! 25.Rd1 ed4 26.Bd4=) 25.ed4 Qa5 (25...Rc4!? 26.Bc2 g6–/+) 26.Bc2= Nb5?? (better is 26...g6=) 27.Qh7+– Kf8 28.Qh8 Ke7 29.Qc8 Qb6 30.Bf5 (30.Rd1!? Qc7 31.Qf5 Qd6+–) 30...Nd4 31.Bd4 (31.Kh1!? Nf5 32.Qf5 Qe6 33.Qg5 Kd7 34.Bg7 Be1+–) 31...Qd4 32.Kh1 Kf6 33.g4 Bd6 34.Re1 Be5 35.Qd8# 1–0. Starr,Albert Martin – Roper,Lee, San Francisco MI Dolan mem 5th, 2005.

10.0–0 Bd6 =.

10.0–0 Ne4 11.c4 dc4 12.Bc4 Nd6 13.Be2 Bf6 14.Nc3 Nb6 15.Qc2 Bd7 16.Ne4 Ba1 17.Ra1 Bb5 18.Neg5 g6 19.Bb5 Nb5 20.Ne4 Nd6 21.Nc5 Nd7 22.d4 Nc5 23.dc5 Nb5 24.Rd1 Qf6 25.c6 b6 26.h3 Ra8 27.Rd7 Ra7 28.h4 Nd6?? 29.e4?? Ra1–/+ 30.Kh2 Qf4 31.Kh3?? Rh1 0–1. Furlong,Kevin – Pruefer,Stefan (1840), Afro op Augsburg, 1998.

10.0–0 Ne8 11.c4 dc4 12.Bc4 Nb6 13.Be2 =.

10.0–0 Ne8 11.c4 Bf6 12.Nc3 (12.d4 Nd6+=) 12...dc4= 13.Bc4 Nd6 (13...Nb6 14.Be2+=) 14.Be2 (14.Bd3 Be7+=) 14...b6 (14...h6 15.Qc2+=) 15.Na2 (15.Qc2 Bb7+=) 15...Bb7= 16.Bf6 Qf6 17.Nb4 Ne5 (17...Nb8 18.Qa4=) 18.Nd4 (18.Ne5 Qe5 19.d4 Qe4=) 18...Qg5 (18...Ra8 19.Qc1 Qg5 20.f3=) 19.g3 (19.Nbc6 Bc6 20.bc6 Ng6=) 19...Qh6 (19...Qf6 20.f4 Nd7 21.Qc2+=) 20.Qc2 Qh3 21.Nbc6 Kh8 22.Ra1 Ng4 23.Nf3 Qh5 24.Ra4 Nh2 25.Nfe5 Qe2 26.Qh7!! (26...Kh7 27.Rh4 Qh5 28.Rh5 Kg8 29.Ne7#) 1–0. Bernstein,Sidney Norman – Seidman,Herbert, USA–ch New York, 1959.

10.c4 dc4=+ 11.Bc4 Nb6 12.Be2 Ne8 (12...Bd6 13.0–0=) 13.Qc2 (13.Bd4 Nd5=) 13...Bf6 (13...Nf6 14.Bf6 Bf6 15.d4=) 14.d4 (14.Bf6 Nf6 15.d4 Qd6+=) 14...Bd7 (14...Be7 15.0–0=) 15.Nc3 (15.Bd3 h6+=) 15...Nd6 16.0–0 g6 (16...c6 17.Bd3 h6 18.Rc1+=) 17.Rc1 (17.Ne5 Bg7+=) 17...c6 (17...Ndc4 18.Na4 Na3 19.Qb3 Na4 20.Qa4+/–) 18.bc6+/– Bc6 19.e4 Bg7 20.e5 (20.Ne5 Qg5 21.Nc6 bc6+/–) 20...Nf5+= 21.Nb5 (21.Ne4 Qd5 22.Bd3 Rc8+=) 21...Qd7 (better is 21...f6=) 22.Na7 (22.Qd3 Nd5 23.Rc5 b6 24.Rc6 Qc6–/+) 22...Bd5 (better is 22...Bf3 23.Bf3 Nd4 24.Bd4 Qd4 25.Bb7 Qe5–/+) 23.Qc7?? (better is 23.Qc5 Na4 24.Qc7=) 23...Qc7–+ 24.Rc7 Ra8 25.Bc3 Ra7 26.g4 Bf3 (better is 26...Ra2!? 27.Kf1 Nh6–+) 27.Bf3 Nh4 28.Bb7 Bf8 29.h3?? (29.Bb2–+) 29…Nd5 (30.Rc8 Rb7–+) 0–1. Jereb,Juergen – Theuermeister,Peter, Vienna op–F, 1996.

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