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Subject: Re: Why your program can't find this move?! :)))

Author: Bernhard Bauer

Date: 06:38:36 07/16/03

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On July 16, 2003 at 09:30:23, Andreas Stabel wrote:

>On July 16, 2003 at 09:14:30, Bernhard Bauer wrote:
>
>>On July 16, 2003 at 05:53:06, Grzegorz Sidorowicz wrote:
>>
>>>[D]8/6p1/P1b1pp2/2p1p3/1k4P1/3PP3/1PK5/5B2 w - -;
>>>
>>>bm Bg2!
>>
>>Actually *my* program can find it. It's Bob's Crafty_19.3 with a modified search
>>running on AMD 1800 MHz.
>>
>>               17->  14:57  -0.31   1. a7 e4 2. Be2 exd3+ 3. Kxd3 Kb5 4.
>>                                    Bd1 Kb6 5. Bb3 Kxa7 6. Bxe6 Kb6 7.
>>                                    e4 Kc7 8. Kc4 Kd6 9. Bf5 Ke5 10. Kxc5
>>                                    Bxe4 11. Bxe4 Kxe4
>>               18    27:48  -0.29   1. a7 e4 2. Be2 exd3+ 3. Kxd3 Kb5 4.
>>                                    Bf3 Bxf3 5. e4 f5 6. a8=Q Bxe4+ 7.
>>                                    Qxe4 fxe4+ 8. Kxe4 Kc6 9. Ke5 Kd7 10.
>>                                    g5 Ke7 11. g6 c4
>>               18    40:30     ++   1. Bg2!!
>>               18    43:16   0.98   1. Bg2 Bxg2 2. e4 f5 3. gxf5 exf5 4.
>>                                    a7 fxe4 5. d4 e3 6. dxe5 Bc6 7. e6
>>                                    e2 8. Kd2 Kb3 9. e7 Kxb2 10. e8=Q Bxe8
>>                                    11. a8=Q
>>               18->  44:12   0.98   1. Bg2 Bxg2 2. e4 f5 3. gxf5 exf5 4.
>>                                    a7 fxe4 5. d4 e3 6. dxe5 Bc6 7. e6
>>                                    e2 8. Kd2 Kb3 9. e7 Kxb2 10. e8=Q Bxe8
>>                                    11. a8=Q
>>regards
>>Bernhard
>
>Normal crafty 19.03 on a 2GHz machine:
>18->   5:24  -0.21   1. a7 e4 2. dxe4 Bxe4+ 3. Bd3 Bc6 4.
>                     Bg6 Ka5 5. Kc3 Kb6 6. Bf7 Kxa7 7. Bxe6
>                     Kb6 8. b4 Bg2 9. Bf5 cxb4+ 10. Kxb4
>                     Bd5 11. Kc3
>19     9:03  -0.26   1. a7 e4 2. dxe4 Bxe4+ 3. Bd3 Bc6 4.
>                     Bg6 Ka5 5. Kc3 Kb6 6. Bf7 Kxa7 7. Bxe6
>                     Kb6 8. Kc4 Bf3 9. b4 Be2+ 10. Kc3 Bb5
>                     <HT>
>19    14:43     ++   1. Bg2!!
>19    15:01   0.70   1. Bg2 Bxg2 2. e4 f5 3. gxf5 exf5 4.
>                     a7 fxe4 5. d4 e3 6. dxe5 Kc4 7. e6
>                     Be4+ 8. Kd1 Bc6 9. e7 Kd3 10. e8=Q
>                     Bxe8 11. a8=Q Bd7
>19->  15:27   0.70   1. Bg2 Bxg2 2. e4 f5 3. gxf5 exf5 4.
>                     a7 fxe4 5. d4 e3 6. dxe5 Kc4 7. e6
>                     Be4+ 8. Kd1 Bc6 9. e7 Kd3 10. e8=Q
>                     Bxe8 11. a8=Q Bd7
>
>So it seems your modified version is not better here.
>

My version is not faster here und in several other positions, but when nullmove
may be a problem I trust my version more. I pay the price.
regards
Bernhard
>Regards
>Andreas Stabel



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