Author: Dann Corbit
Date: 17:11:25 06/05/02
Go up one level in this thread
On June 05, 2002 at 10:27:28, Jon Dart wrote: >Recently Arasan had this position in a game: > >[D] 8/8/1p5P/2b2P2/7K/8/1k6/8/ b - - > >Crafty evaluates this statically as won for White, which is correct. Arasan's >pawn race code doesn't currently cover this case, although it would evaluate it >correctly if there was no Black bishop, and it sees pretty quickly in the search >what the situation is. But in the game, it exchanged into this lost position, as >it couldn't search deep enough to see the consequences. > >I'm wondering how well other programs evaluate this. Beowulf: [1]W > setboard 8/8/1p5P/2b2P2/7K/8/1k6/8 b - - [1]B > go [1]B > Current Position = 0.40 Number of Possible Moves = 18 6 -42 62 18414 Ka2 f6 Bd4 f7 Bf2+ Kg5 Bc5 6 3 66 19271 Bd4 Kg5 Kc2 h7 Be3+ Kf6 Bd4+ Ke6 Kd3 7 -26? 114 31294 Bd4 Kg5 Kb3 h7 Bh8 7 -62 229 68038 Bd4 Kg5 b5 f6 Be3+ Kg6 Bd4 7 -18 240 72788 Be3 h7 Bd4 Kg5 Bh8 f6 Kc3 8 -48? 270 81019 Be3 h7 Ka1 Kg4 Bd4 Kg5 Bh8 Kf4 8 -52 470 161133 Be3 h7 Bd4 Kg5 Bh8 f6 Kb1 9 -86? 518 186362 Be3 h7 Bc5 Kg4 Ka3 Kg5 Be3+ Kg6 Kb2 h8q+ Ka3 9 -83 811 370770 Be3 Kh5 Bc5 h7 Bf8 Kg5 Kb3 f6 Kc2 h8q Kb3 Qxf8 10 -113? 838 394189 Be3 Kh5 Bd4 Kg6 Bh8 f6 b5 h7 Kb1 f7 Bg7 10 -763 1177 665289 Be3 Kh5 Bd4 Kg6 b5 f6 b4 h7 Kc3 h8q b3 11 -792? 2159 1443367 Be3 Kh5 Bd4 Kg6 b5 f6 b4 h7 Bf2 h8q Kc2 11 -806 3249 2424079 Be3 Kh5 Bd4 Kg6 b5 f6 b4 f7 b3 f8q Kc2 Qf3 12 -835? 4655 3903415 Be3 Kh5 Bd4 Kg6 b5 f6 b4 f7 Bh8 f8q Ka3 Qxh8 12 -835 9833 7118370 Be3 Kh5 Bd4 Kg5 Be3+ Kg6 b5 f6 b4 h7 Bd4 h8q Kb1 f7 Bxh8 f8q 13 -864? 11056 9086280 Be3 h7 Bd4 Kg5 Be3+ Kg6 Bd4 f6 Bc5 h8q b5 Kg5 Ka 3 f7 Be7+ Kh5 Bc5 Qc3+ Ka4 Qxc5 13 -1223 17660 13908118 Be3 h7 Bd4 Kg5 Be3+ Kg6 Bd4 f6 Kc3 h8q Kc4 f7 Kd 5 f8q b5 Qxd4+ 14 -1252? 32633 25227999 Be3 h7 Bd4 Kg5 Bh8 f6 b5 f7 Be5 h8q Kc2 f8q Bd6 Qxd6 Pure eval: [1]W > setboard 8/8/1p5P/2b2P2/7K/8/1k6/8 b - - [1]B > eval Current Position ---------------- White Points: 2 Black Points: 4 (Black is Ahead by 2 Pts) Static Analysis Score Black is Ahead by 0.40 Pawns
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