Author: Christopher Conkie
Date: 15:02:11 06/12/05
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Hello Dieter, The point is not that b1B wins (which it does eventually. The point is that the engine can't see that b1Q or b1R is stalemate. It values material gain or does not understand underpromotion to a bishop. Look here is Crafty......(an early version at well) [D]8/8/5b2/8/K7/8/kp6/3N4 b - - 1 63 Crafty 11.23: 7 00:01 12.896 644.800 +4.45 b1B Kb4 Bc2 Ne3 Be4 Kc5 Be5 7 00:01 20.645 516.125 +4.45 b1B Kb4 Bc2 Ne3 Be4 Kc5 Be5 8 00:01 31.768 529.466 +4.27 b1B Kb4 Bc2 Ne3 Be4 Kc5 Kb3 Nd5 8 00:01 51.473 571.922 +4.27 b1B Kb4 Bc2 Ne3 Be4 Kc5 Kb3 Nd5 9 00:01 115.048 719.050 +4.51 b1B Kb4 Bd3 Kc5 Kb3 Ne3 Bb2 Nd5 Kc2 9 00:01 142.697 751.036 +4.51 b1B Kb4 Bd3 Kc5 Kb3 Ne3 Bb2 Nd5 Kc2 10 00:01 219.611 878.444 +4.46 b1B Kb4 Bd3 Kc5 Kb1 Ne3 Kc1 Nc4 Kc2 Kd5 10 00:01 297.676 930.237 +4.46 b1B Kb4 Bd3 Kc5 Kb1 Ne3 Kc1 Nc4 Kc2 Kd5 11 00:01 890.367 1.072.731 +4.53 b1B Kb4 Bg6 Kc4 Bg7 Nc3+ Kb2 Nb5 Kc2 Nd4+ Kd2 Kd5 Kc3 11 00:01 1.043.035 1.086.494 +4.53 b1B Kb4 Bg6 Kc4 Bg7 Nc3+ Kb2 Nb5 Kc2 Nd4+ Kd2 Kd5 Kc3 12 00:02 1.869.671 1.133.133 +4.61 b1B Kb4 Bg6 Kc5 Kb3 Ne3 Bg7 Kd5 Kc3 Nd1+ Kd2 Nf2 Ke3 12 00:02 2.270.105 1.158.216 +4.61 b1B Kb4 Bg6 Kc5 Kb3 Ne3 Bg7 Kd5 Kc3 Nd1+ Kd2 Nf2 Ke3 13 00:04 4.047.834 901.522 +4.66 b1B Kb4 Bg6 Kc5 Kb3 Ne3 Bg7 Kd5 Kc3 Ke6 Kd3 Nf5 Bc3 13 00:05 4.899.982 935.111 +4.66 b1B Kb4 Bg6 Kc5 Kb3 Ne3 Bg7 Kd5 Kc3 Ke6 Kd3 Nf5 Bc3 14 00:08 8.570.225 1.038.815 +4.65 b1B Kb4 Bg6 Kc5 Kb3 Ne3 Bh4 Kd5 Kc3 Ke6 Bg3 Nd5+ Kd4 Nf6 Kc3 14 00:10 11.602.501 1.105.000 +4.65 b1B Kb4 Bg6 Kc5 Kb3 Ne3 Bh4 Kd5 Kc3 Ke6 Bg3 Nd5+ Kd4 Nf6 Kc3 It understands instantly that for the game to go on it need a piece lower than a Rook in material terms. Do you see what I mean? :-) Regards Christopher
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