Author: Robert Hyatt
Date: 12:32:33 11/09/00
Go up one level in this thread
On November 09, 2000 at 04:28:17, Uri Blass wrote: >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 This is how I would like to solve these kinds of positions. The program (Crafty) isn't happy at all, because of the blocked pawns, which it completely hates. But it sees a way to start liquidating them. And that "unblocking" is what it likes.
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