Author: Uri Blass
Date: 01:28:17 11/09/00
Go up one level in this thread
On November 08, 2000 at 23:34:06, Robert Hyatt wrote: >On November 08, 2000 at 06:11:40, José Antônio Fabiano Mendes wrote: > >> Dark Thought-IM Johan van Mil[2406] >> 12st AEGON,Round 5 Aprli 22,1997 >> 1.e4 g6 2.d4 c6 3.c3 d5 4.e5 Bg7 5.Nf3 Bg4 6.Be2 e6 7.O-O Nd7 >> 8.Nbd2 Ne7 9.h3 Bxf3 10.Nxf3 Qb6 11.h4 h5 12.Re1 c5 13.Qa4 Nc6 >> 14.Bd2 a6 15.Rac1 Qa7 16.Bg5 b5 17.Qc2 c4 18.Qd2 Rb8 19.Ra1 Rb7 >> 20.Reb1 Qb8 21.b4 a5 22.bxa5 Nxa5 23.Bd1 Bf8 24.a3 Rb6 25.Qb2 Qb7 >> 26.Bf4 Be7 27.Bd2 O-O 28.Bg5 Bxg5 29.Nxg5 Kg7 30.Qc2 Rh8 31.Qc1 Nb8 >> 32.a4 b4 33.Qf4 b3 34.Qf6+ Kg8 35.Nxf7 Qxf7 36.Qd8+ Kg7 37.Qxb6 Nbd6 >> reaching the following position: >> [D]7r/5qk1/1Qn1p1p1/n2pP2p/P1pP3P/1pP5/5PP1/RR1B2K1 w >> And here Dark Thought played 38.Be2? instead of 38.Qc5 >> IM van Mil:"I was deeply impressed how beautifully I was outplayed >> by Dark Thought.I was lost but the computer missed one >> thing.I had a potential breakthrough which was too far >> away for the computer to comprehend.Because of that it >> opted for the wrong exchange of pieces." >> The obvious questions: How today's chess programs evaluate the position? >> Can they find the crucial Queen move? [38.Qc5] >> By the way,IM van Mil won the game in 86 moves. JAFM > > >I don't think this is hard for today's machines. Crafty finds this after 2 >seconds on the quad xeon, at depth=10. Depth=12 takes about 10 seconds and >the move hasn't changed from Qc5. Depth 14 comes at the 1 minute mark and it >still says Qc5. I stopped it there... > >I would assume other programs find this as quick or quicker... Crafty isn't >known for finding these things quickly. I believe that programs that find it fast find it for positional reasons. There is no big difference between the score of Qc5 and the score of the second best move. The difference between Qc5 and Rb2 based on Crafty17.13 at depth 11 is only 0.38 pawns. Uri
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