Author: Robert Hyatt
Date: 09:09:27 10/01/01
Go up one level in this thread
On September 30, 2001 at 19:18:53, Miguel A. Ballicora wrote: >On September 30, 2001 at 17:14:38, Roy Eassa wrote: > >>On September 30, 2001 at 10:39:50, Miguel A. Ballicora wrote: >> >>>[D]8/4k1p1/1p2B2p/4p3/8/4P2P/1PP1KbP1/8 b - - am Bxe3; >> >> >>I think this is a good test. >> >>Gambit Tiger 2.0 on an Athlon 1.2 is smart enought to know right away that the >>pawn ending is not good, but takes a little while to avoid ...Bxe3: >> >>00:00:00.1 -0.60 12 210784 Bxe3 Kxe3 Kxe6 c4 h5 Ke4 g5 b4 >>00:00:00.8 -0.64 12 303820 Bxe3 Kxe3 Kxe6 c4 h5 Ke4 Kd6 g3 g5 b4 Ke6 >>00:00:01.7 -0.66 13 722703 Bxe3 Kxe3 Kxe6 c4 h5 g4 hxg4 hxg4 g6 b4 g5 Ke4 Kf6 c5 >>00:00:03.3 -0.68 14 1439003 Bxe3 Kxe3 Kxe6 c4 h5 g4 hxg4 hxg4 g6 b4 Kd6 Ke4 Ke6 >>g5 Kd6 c5+ bxc5 bxc5+ Ke6 >>00:00:07.4 -0.68 15 3460748 Bxe3 Kxe3 Kxe6 c4 h5 g4 hxg4 hxg4 g6 b4 Kd6 Ke4 Ke6 >>g5 Kd6 c5+ bxc5 bxc5+ Ke6 >>00:00:14.6 -0.74 16 6705228 Bxe3 Kxe3 Kxe6 c4 h5 Ke4 h4 b4 Kd6 c5+ bxc5 bxc5+ >>Ke6 c6 Kd6 c7 Kxc7 Kxe5 Kd7 >>00:00:54.4 -0.71 16 24860070 Bg1 Bc4 Kd6 Kf3 g5 g4 Kc5 Be6 Kd6 Bf7 Kc6 Bg8 Kc5 >>Ke4 Kd6 Bc4 >>00:01:28.5 -0.69 16 40056032 Bg3 Kf3 Be1 Bd5 Kd6 c4 >>00:01:55.6 -0.69 17 52088811 Bg3 Kf3 Be1 Bd5 Kd6 c4 Bd2 Ke4 g6 g4 Be1 b3 Bg3 Bf7 >>g5 Bd5 Bf2 >> >>Not as good as Crafty, but still better than many other engines. > >Here is a much tougher test from a real game >(A. Sokolov - Korchnoi Tilburg 1987) >Easy endgame? not quite! > >A. Sokolov miscalculated and made a mistake, played Rxc5? which ends up losing >easily. Rb8 puts up a much tougher resistance with good chances of drawing. > >[D]8/2p3pp/8/1RrkP3/8/3K4/6PP/8 w - - am Rxc5; > >Not even Crafty gets this right (15 min K6-II 400mhz) Probably >a problem evaluating the rook endgame because it sees a clear >disadvantage in the pawn endgame. > >Regards, >Miguel This is a different problem. Rxc5 goes into a lost ending with even material. Any other rook move drops a pawn, which looks just as bad. It thinks either case is probably losing...
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