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Subject: Re: Zugzwang!

Author: Dann Corbit

Date: 14:37:40 07/28/99

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On July 28, 1999 at 17:05:53, Kristo Miettinen wrote:
>On a lark, I decided to ask Crafty to analyze the opening position in chess
>without benefit of an opening book.
>
>To my surprise, in iteration after depth iteration, Crafty returned a mild
>negative evaluation.
>
>Is this for real? And if so, is it the quirky symptom of an otherwise useful
>characteristic in Crafty?
>
>Just curious!

Probably not related to Zugzwang at all.  It is just that, given the current
event horizon, following the currently calculated best possible trajectory, the
eval function returns a negative number.  What did you expect?  The result of
the eval function must be positive, negative, or zero.  And it can only see
ahead as many plies as time allows.  Post the position and I will give you the
C.A.P. analysis for it.



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