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Subject: Re: Test Move and Position for Pawn Promotion

Author: J. Wesley Cleveland

Date: 22:52:06 04/01/02

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On April 01, 2002 at 19:31:26, Terry McCracken wrote:

>On April 01, 2002 at 18:42:20, Miguel A. Ballicora wrote:
>
>>On April 01, 2002 at 17:56:12, Art Basham wrote:
>>
>>>Here white plays Bxg6..!!
>>>(taken from the Yazgac test suite...)
>>>
>>>[D]r1b5/p2k1r1p/3P2pP/1ppR4/2P2p2/2P5/P1B4P/4R1K1 w - -
>>>
>>>I do not know if a computor program can find this one or not..:-)
>>
>>Many can, but the problem is that it is not the only solution.
>>IIRC crafty chooses the prosaic cxb5 that also wins (with the idea of Ba4 and
>>b6+). The pressure is too much for black to take.
>>
>>Regards,
>>Miguel
>
>True but it's about finding the "Best Move" and _all_ programmes look at cxb5
>first and is a good move, but not the best, the programme needs to see there is
>better, then choose it. That is what we humans "Try" to do!;)
>
>Terry
It is not clear that Bxg6 is better. The evaluation you gave in a different
message shows white up 1.36 pawns. Crafty thinks that cb5 is +2 at the same
depth and by ply 17 is up 3 pawns.



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