Author: Michael Diosi
Date: 01:22:01 06/13/05
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Hello, The only winning move for black is b1B so now you understand that this engine has a problem with a) underpromotion b) it sees a mate which is not there c) move ordering/move selection so this helps the author fix it but it also helps us to understand how this engine operates. Your task is to find an engine which does this, this would be helpful. Just in case you wonder here is the output of another engine: FEN: 8/8/5b2/8/K7/8/kp6/3N4 b - - 0 63 FEN: 8/8/5b2/8/K7/8/kp6/3N4 b - - 0 63 Queen 3.05: 1 00:00 2 0 -10.86 b1Q 2 00:00 24 2 -10.49 3 00:00 190 10 -0.05 Ka1 3 00:00 270 14 -4.29 4 00:00 823 41 -3.99 Ne3 5 00:00 2.082 69 -4.05 Nc3+ Kxb2 Nd5 6 00:00 7.327 183 -3.88 Be7 Bd6 7 00:00 23.605 337 -3.86 Nf2 Kb3+ 8 00:00 54.497 454 -3.88 Nf2 Kb3+ 9 00:00 121.273 551 -3.79 Nf2 Kb1 Kc2 10 00:00 425.833 607 -3.85 Kb3+ Ne3+ Kc3 11 00:01 1.064.290 660 -3.81 Kb3+ Ne3+ 12 00:04 3.058.561 696 -3.85 Nc3+ Kxb2 Nd5 Bg7 Kc2 Nf4 Nd5 13 00:09 6.795.514 710 -3.83 Ne3 Nc4 Bd4 Nd6 Nb5 Be5 Nc3+ Ka1 Ne4 14 00:19 13.964.932 718 -3.92 Kb3+ Nf2+ Bg7+ Ne4+ Kc2 Bd4 Nc5 15 00:38 26.837.017 704 -3.92 Kb3+ Nf2+ Bg7+ Ne4+ Kc2 Kd3 Ng5 Ne6 16 01:16 51.772.693 681 -3.99 Kb3+ Nf2+ Kc2 Ne4 Be5 Ng5 Look : Kb3+ good move, no ? Best, Michael
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