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Subject: Re: Position, am Qxh6

Author: Andrew Williams

Date: 13:59:29 04/21/04

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On April 21, 2004 at 14:27:58, Gerd Isenberg wrote:

>IsiChess MMX, Athlon XP 2.8+ 256MB has some problems to avoid the terrible Qxh6
>(40 seconds) and to switch to Qh4 and the "obvious" Nc6+ later, winning the
>exchange for a pawn.
>
>I found that a bit strange - do other programs have similar problems?
>
>[D]1rb3r1/4kp2/p2q1n1p/Pp1p1P2/3NpQ2/2P2B2/2P3PP/R3R2K w - - am Qxh6
>
>Thanks,
>Gerd

PM switches away from Qxh6 after 2.15 seconds:

 1>  +0.69   00:00:00.00         3   1.Qxh6
 1<  +1.95   00:00:00.00        56   1.Qxh6
 1=  +1.94   00:00:00.00        60   1.Qxh6
 2>  +1.94   00:00:00.00        63   1.Qxh6
 2<  +1.95   00:00:00.00       148   1.Qxh6
 2=  +1.94   00:00:00.00       148   1.Qxh6
 3<  +1.94   00:00:00.01       476   1.Qxh6
 3>  +1.02   00:00:00.01      1481   1.Qxh6 Ke8
 3=  +1.03   00:00:00.01      1608   1.Qxh6 Ke8
 4<  +1.03   00:00:00.03      2966   1.Qxh6
 4>  +0.93   00:00:00.03      3376   1.Qxh6 Kd7 2.Be2
 4=  +0.94   00:00:00.03      3489   1.Qxh6 Kd7 2.Be2
 5>  +0.94   00:00:00.06      6284   1.Nc6 Qxc6 2.Qxb8 Bxf5 3.Qe5
 5<  +1.01   00:00:00.07      7835   1.Nc6
 5=  +0.99   00:00:00.08      8054   1.Nc6 Qxc6 2.Qxb8 Bxf5 3.Qe5 Qe6
 6<  +0.99   00:00:00.17     20887   1.Nc6
 6>  +0.64   00:00:00.27     34821   1.Qxh6 Kd7 2.Be2 Kc7 3.g3
 6=  +0.70   00:00:00.28     36040   1.Qxh6 Kd7 2.Be2 Kc7 3.g3
 7<  +0.70   00:00:00.46     74527   1.Qxh6
 7>  +0.56   00:00:00.57    111293   1.Qxh6 Bb7 2.g3 Kd7 3.Bg2 Kc7
 7=  +0.59   00:00:00.58    116312   1.Qxh6 Bb7 2.g3 Kd7 3.Bg2 Kc7
 8>  +0.59   00:00:00.84    186498   1.Qxh6 Bb7 2.g3 Kd7 3.Bg2 Kc7
 8<  +0.60   00:00:01.11    286202   1.Qxh6
 8=  +0.59   00:00:01.12    286202   1.Qxh6 Bb7 2.g3 Kd7 3.Bg2 Kc7
 9<  +0.59   00:00:01.93    587508   1.Qxh6
 9>  +0.57   00:00:02.13    649120   1.Nc6 Qxc6 2.Qxb8 Bxf5 3.Qb6 Qxc3 4.Qxa6
Qxc2
                                     5.Qxb5 Qf2 6.Qb4 Kd7 7.Re2
 9=  +0.58   00:00:02.15    652984   1.Nc6 Qxc6 2.Qxb8 Bxf5 3.Qb6 Qxc3 4.Qxa6
Qxc2
                                     5.Qxb5 Qf2 6.Qb4 Kd7 7.Re2
10>  +0.58   00:00:02.88    872493   1.Nc6 Qxc6 2.Qxb8 Bxf5 3.Qa7 Bd7 4.Rac1 Kf8
                                     5.Be2 Qd6 6.Kg1
10<  +0.73   00:00:05.41   1802624   1.Nc6
10=  +0.71   00:00:05.61   1886068   1.Nc6 Qxc6 2.Qxb8 Qxc3 3.Qf4 Bd7 4.Rac1 h5
                                     5.g3 Qxa5

It keeps on with Nc6 for at least 6 minutes...

Andrew



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