Author: Dan Ellwein
Date: 19:39:31 01/10/06
Go up one level in this thread
On January 09, 2006 at 11:02:06, Albert Silver wrote: >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 Hi Albert It is odd that even after a 10-ply search CMX(default) does not even include Bxg6 in the top 10 moves... P3/850 Mentor Lines Show 10 best moves Time Depth Score Positions Moves 3:31 2/10 0.54 17116704 1.c4 Nf6 2.Qb2 Rad8 3.Re1 Rfe8 4.Bc2 Bc5 5.Bc3 Bd6 3:48 2/10 0.54 18545733 1.Qb2 Rad8 2.Re1 Nf6 3.c4 Rfe8 4.Bc2 Bc5 5.Bc3 Bd6 7:49 2/10 0.53 37742771 1.Qb1 Nf6 2.Qe1 Nh5 3.Rxh5 gxh5 4.Rh3 f6 5.Nc4 Kf7 6.Rxh5 8:57 2/10 0.53 43013901 1.Qc1 Nf6 2.Qe1 Nh5 3.Rxh5 gxh5 4.Rh3 f6 5.Nc4 Kf7 6.Rxh5 10:22 2/10 0.53 50147547 1.Qd1 Nf6 2.Qe1 Nh5 3.Rxh5 gxh5 4.Rh3 f6 5.Nc4 Kf7 6.Rxh5 4:24 2/10 0.48 21218728 1.Re2 Nf6 2.Qb1 Rac8 3.g4 h5 4.g5 Ng4 5.Bb5 a6 5:32 2/10 0.48 26706493 1.Re1 Nf6 2.Qb3 Rfe8 3.Bc1 Rac8 4.Bb5 Red8 5.Qc2 Bb4 6:28 2/10 0.48 31062645 1.Qb3 Nf6 2.Re1 Rfe8 3.Bc1 Rac8 4.Bb5 Red8 5.Qc2 Bb4 5:42 2/10 0.45 27517684 1.Rhg3 Nf6 2.Re2 Rfd8 3.f5 exf5 4.Bg5 f4 5.Bxf4 Re8 4:36 2/10 0.43 22252921 1.Qa4 Nf6 2.c4 a6 3.Re1 Rfd8 4.c5 Be7 5.c6 b5 Dan
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