Author: Christophe Theron
Date: 10:24:56 11/03/03
Go up one level in this thread
On November 03, 2003 at 06:41:33, Ricardo Gibert wrote:
>[snip]
>
>>
>>In the same vein, the following position has always been a nightmare for Tiger:
>>
>>[D]8/1KP5/3q2k1/8/6p1/8/8/8 b - -
>>
>>This position comes from a real game between the Modular Game System Sargon 2.5
>>and Mike III, played in September 1980 during the Personal Computer World Fair.
>>Mike III continued the game with a long series of checks leading to a draw.
>>
>>Chess Tiger is not smarter than Mike III here. It is something that I had fixed
>>in the 16 bits version, to the expense of some added complexity in the passed
>>pawns evaluation code. I have not transfered this code to the 32 bits version
>>because it was not general enough (add another black pawn and the code did not
>>work).
>>
>>I am interested in results of other (amateur and commercial) programs.
>>
>>
>>
>> Christophe
>
>
>At depth 2 and onward, Ruffian sees that it must trade its Q. Even when it
>switches away from 1.Qxc7 to 1.Qd5 at depth 8, it consistently follows up by the
>trade in its PV. Ruffian understands this position without breaking a sweat:
>
>Using an 800mhz Athlon with 32Mb Hash
>
>Ruffian_101 UCI:
>D1 00:00 3.18 g4g3 c7c8Q
>D1 00:00 7.71 Qd6e7
>D1 00:00 7.92 Qd6d5 Kb7b8
>D1 00:00 8.18 Qd6b4 Kb7c6
>D2 00:00 8.18 Qd6b4 Kb7c6 Qb4f8
>D2 00:00 8.52 Qd6d5 Kb7b6 Qd5f5
>D2 00:00 8.89 Qd6xc7 Kb7xc7 g4g3
>D3 00:00 8.69 Qd6xc7 Kb7xc7 g4g3 Kc7d6
>D4 00:00 9.30 Qd6xc7 Kb7xc7 g4g3 Kc7d6 g3g2 Kd6e5 g2g1Q
>D5 00:00 9.30 Qd6xc7 Kb7xc7 g4g3 Kc7d6 g3g2 Kd6e5 g2g1Q
>D6 00:00 9.90 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6d7 g3g2 Kd7e7 g2g1Q
>D7 00:00 9.90 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6d7 g3g2 Kd7e7 g2g1Q
>D8 00:00 9.80 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6c5 Kf5e5 Kc5c4 g3g2 Kc4d3
>g2g1Q
>D8 00:00 9.98 Qd6d5 Kb7b6 Qd5e6 Kb6b7 g4g3 c7c8Q Qe6xc8 Kb7xc8 g3g2 Kc8d7
>Kg6f6 Kd7d6 Kf6f5 Kd6d5 Kf5f4 Kd5e6
>D9 00:00 10.00 Qd6d5 Kb7b6 Qd5e6 Kb6b7 g4g3 c7c8Q Qe6xc8 Kb7xc8 Kg6f5 Kc8d8
>g3g2 Kd8d7 Kf5e5 Kd7e7 g2g1Q
>D10 00:00 10.00 Qd6d5 Kb7b6 Qd5e6 Kb6b7 g4g3 c7c8Q Qe6xc8 Kb7xc8 Kg6f5 Kc8d7
>Kf5e5 Kd7e7 g3g2 Ke7d7 g2g1Q
>D11 00:01 10.00 Qd6d5 Kb7a7 Qd5e6 Ka7b8 g4g3 c7c8Q Qe6xc8 Kb8xc8 Kg6f5 Kc8d7
>Kf5e5 Kd7e7 g3g2 Ke7d7 g2g1Q
>D12 00:02 10.00 Qd6d5 Kb7a7 Qd5e6 Ka7b8 g4g3 c7c8Q Qe6xc8 Kb8xc8 Kg6f5 Kc8d7
>Kf5e5 Kd7e7 g3g2 Ke7d7 Ke5d5
>D13 00:07 10.00 Qd6d5 Kb7a7 Qd5e6 Ka7b8 g4g3 c7c8Q Qe6xc8 Kb8xc8 Kg6f5 Kc8d7
>Kf5e5 Kd7e7 g3g2 Ke7d7 Ke5d5 Kd7e7 g2g1Q
>D14 00:16 10.00 Qd6d5 Kb7a7 Qd5e6 Ka7b8 g4g3 c7c8Q Qe6xc8 Kb8xc8 Kg6f5 Kc8d7
>Kf5e5 Kd7e7 g3g2 Ke7d7 Ke5d5 Kd7e7 g2g1Q
>D14 00:16 10.14 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6c5 Kf5e5 Kc5c4 g3g2 Kc4d3
>g2g1Q Kd3d2 Qg1d4 Kd2c2 Qd4e3 Kc2b2 Ke5d4
>D15 00:21 10.14 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6c5 Kf5e5 Kc5c4 g3g2 Kc4d3
>g2g1Q Kd3e2 Qg1g4 Ke2e1 Qg4e4 Ke1f2 Ke5d4 Kf2g3
>D16 00:34 10.14 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6c5 Kf5e5 Kc5c4 g3g2 Kc4d3
>g2g1Q Kd3c3 Qg1d4 Kc3c2 Ke5e4 Kc2b3 Ke4e3 Kb3c2
>D17 00:56 10.24 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6c5 Kf5e5 Kc5c4 g3g2 Kc4d3
>g2g1Q Kd3c3 Qg1d4 Kc3c2 Ke5e4 Kc2b3 Ke4e3 Kb3c2 Qd4c4 Kc2d1
>D18 01:48 10.24 Qd6xc7 Kb7xc7 g4g3 Kc7d6 Kg6f5 Kd6c5 Kf5e5 Kc5c4 g3g2 Kc4d3
>g2g1Q Kd3c3 Qg1d4 Kc3c2 Ke5e4 Kc2b3 Ke4e3 Kb3c2 Qd4c4 Kc2b2 Qc4d5 Kb2c3
OK, now I really look stupid. :)
Thanks!
Christophe
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