Author: Albert Silver
Date: 08:02:06 01/09/06
This was shared at CSS: [Event "Liberec 2005 (CZE)"] [Site "Liberec, Hotel Liberec (CZ"] [Date "2005.10.23"] [Round "2.12"] [White "Pakosta, Miroslav"] [Black "Rogalski, Krzysztof"] [Result "1-0"] [ECO "B22"] [WhiteElo "2177"] [BlackElo "2016"] [PlyCount "43"] [EventDate "2005.10.22"] 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 e6 6. cxd4 Be7 7. Nc3 Nxc3 8. bxc3 O-O 9. Bd3 d6 10. O-O dxe5 11. Nxe5 Nd7 12. f4 Nf6 13. Rf3 g6 14. Rh3 Qc7 15. Bd2 b6 16. Qc2 Bd6 17. Re1 Bb7 18. Ree3 Nd7 19. Bxg6 fxg6 20. Rxh7 Rf6 21. Reh3 Bxe5 22. Rh8+ 1-0 [D]r4rk1/pbqn1p1p/1p1bp1p1/4N3/3P1P2/2PBR2R/P1QB2PP/6K1 w - - 0 19 The move is 19.Bxg6. Despite looking fairly simple, this one gives most engines a hard time even on decent hardware: AMD Athlon64 3500+ (Venice) with 512Mb Hashtables: Analysis by Rybka 1.01 Preview 2 32-bit: 19.Rh6 Nf6 20.Rg3 Kg7 21.Rgh3 ² (0.57) Depth: 8 00:00:02 286kN 19.Rh6 Nf6 20.Rg3 Kg7 21.Rh4 Kh8 ² (0.57) Depth: 9 00:00:03 458kN 19.Reg3 Nf6 20.c4 Rac8 21.Rh6 a6 ² (0.62) Depth: 9 00:00:07 997kN 19.Reg3 Nf6 20.c4 Rfd8 21.Bc3 Rac8 22.Qb1 ² (0.57) Depth: 10 00:00:11 1483kN 19.Reg3 Nf6 20.Rh6 Bd5 21.c4 Bb7 22.a4 Rac8 ² (0.63) Depth: 11 00:00:26 3450kN 19.Reg3 Nf6 20.Rh6 Bd5 21.c4 Bb7 22.a4 Rac8 23.a5 ² (0.65) Depth: 12 00:00:40 5344kN 19.Reg3 Nf6 20.Rh6 Bd5 21.c4 Bb7 22.a4 Rac8 23.a5 Ra8 ² (0.65) Depth: 13 00:01:10 9529kN 19.Reg3 Nf6 20.Rh6 Bd5 21.c4 Bb7 22.a4 Kg7 23.Rh4 Kh8 24.Bc3 ² (0.65) Depth: 14 00:02:15 18499kN 19.Bxg6 hxg6 20.Nxg6 Kg7 21.Ne5 Kf6 22.Rh7 Bd5 23.Rxf7+ Rxf7 24.Qg6+ Ke7 25.Qxf7+ Kd8 ² (0.67) Depth: 14 00:03:51 33265kN Analysis by Rybka 1.01 Beta 9 32-bit "Neutral": 19.Reg3 Nf6 20.c4 Rad8 21.Bc3 ² (0.62) Depth: 8 00:00:02 134kN 19.Reg3 Nf6 20.c4 Rad8 21.Bc3 Rfe8 ² (0.61) Depth: 9 00:00:03 203kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Rfe8 22.Bc3 ² (0.59) Depth: 10 00:00:08 448kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Kh8 22.Bc3 Ng8 ² (0.61) Depth: 11 00:00:16 805kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Rb8 22.a4 Rfd8 23.Bc3 ² (0.61) Depth: 12 00:00:33 1676kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Rb8 22.a4 Rbc8 23.a5 Ra8 ² (0.65) Depth: 13 00:01:11 3710kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Rb8 22.a4 Ra8 23.Bc3 Rfd8 24.Rhh3 ² (0.63) Depth: 14 00:02:20 7212kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Kg7 22.Rgh3 Kg8 23.Be1 Rde8 24.Bc3 Rd8 25.Rg3 Rc8 ² (0.63) Depth: 15 00:05:59 18242kN 19.Reg3 Nf6 20.Rh6 Rad8 21.c4 Rc8 22.a4 Ra8 23.Qb1 Rab8 24.Qe1 Rfd8 25.Bc3 ² (0.66) Depth: 16 00:13:46 41902kN 19.Bxg6 hxg6 20.Nxg6 Kg7 21.Nxf8 Nxf8 22.f5 Qc6 23.Re2 Ba6 24.Bh6+ Kg8 25.fxe6 Bxe2 ± (0.81) Depth: 16 00:18:00 54507kN Analysis by Rybka 1.01 Beta 9 32-bit Optimistic: 19.Rh6 Nf6 20.Rg3 Rfd8 21.Rh4 ² (0.56) Depth: 8 00:00:02 112kN 19.Reg3 Nf6 20.c4 Kh8 21.Rh6 ² (0.61) Depth: 8 00:00:03 178kN 19.Reg3 Nf6 20.c4 Rfd8 21.Rh4 Rac8 ² (0.60) Depth: 9 00:00:05 302kN 19.Rh6 Nf6 20.Rg3 Kh8 21.c4 Ng8 ² (0.63) Depth: 9 00:00:06 359kN 19.Rh6 Nf6 20.Rg3 Kh8 21.c4 Rad8 22.Qb2 ² (0.61) Depth: 10 00:00:09 523kN 19.Rh6 Nf6 20.Rg3 Rad8 21.c4 Kh8 22.Qb2 Rg8 ² (0.60) Depth: 11 00:00:17 944kN 19.Rh6 Nf6 20.Rg3 Rad8 21.c4 Rc8 22.Qb1 Kh8 23.Bc3 ² (0.61) Depth: 12 00:00:46 2635kN 19.Rh6 Nf6 20.Rg3 Rad8 21.c4 a6 22.Bc3 Kg7 23.Rgh3 Kg8 ² (0.64) Depth: 13 00:01:51 6254kN 19.Rh6 Nf6 20.Rg3 Rad8 21.c4 a6 22.Bc3 Kg7 23.Rh4 Kh8 24.a4 ² (0.65) Depth: 14 00:03:18 10745kN 19.Rh6 Nf6 20.Rg3 Rad8 21.c4 Rc8 22.a4 a6 23.Bc3 Nd5 24.Bxg6 fxg6 25.cxd5 ² (0.64) Depth: 15 00:07:48 23513kN 19.Bxg6 hxg6 20.Nxg6 Kg7 21.Ne5 Kf6 22.Rh7 Bd5 23.Rxf7+ Rxf7 24.Qg6+ Ke7 25.Qxf7+ Kd8 ² (0.66) Depth: 15 00:10:34 31519kN
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