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Subject: Re: Null-Move: Difference between R = 2 and R = 3 in action

Author: Dann Corbit

Date: 14:02:42 07/15/02

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On July 15, 2002 at 16:43:39, Gian-Carlo Pascutto wrote:

>On July 15, 2002 at 16:19:32, Dann Corbit wrote:
>>On July 15, 2002 at 16:09:57, Gian-Carlo Pascutto wrote:
>>>Have a foolproof method for identiefying zugzwang?
>>Never bother analyzing the root node.  Analyze all forward nodes from the root
>>instead at ply zero [from current].
>>If every evaluation is worse than the current evaluation before analysis, then
>>you are zugzwang.
>>It's also handy for move ordering.
>This doesn't work :)
>(Explanation left as exercise to the reader)

It leaves false positives.  It also assumes an exhaustive ply 0 search (eval).

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