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Subject: Re: Crafty null move question

Author: J. Wesley Cleveland

Date: 11:56:29 07/18/02

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On July 18, 2002 at 00:39:08, Robert Hyatt wrote:

>On July 17, 2002 at 17:42:23, Patrik wrote:
>
>>The reason to allow null move only when more than 5 pieces left
>>comes from zugzwang. Right?
>>Then, what is the reason to allow null move when less than 7 plies left?
>
>So that as you get into potential zugzwang positions, the first N plies
>will be null-move free...  The deeper you search, the more accurate the
>first N moves will be.  This solves many of the null-move killer positions
>easily.

Here is one it does not work on. If you enter gxh8=Q, crafty sees it is winning
instantly, but appears never to consider this move.

4K1kr/6Pp/5q1P/4P3/8/3P4/8/8 w - - 0 4





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