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Subject: Re: stalemate guard

Author: Christophe Theron

Date: 09:42:22 11/08/98

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On November 08, 1998 at 12:15:30, James Long wrote:

>
>I recently received a game via email that Tristram played
>against Gromit.  Tristram had 1 queen, 1 rook and 3 pawns
>vs a lone king, and allowed Gromit a stalemate.  I've
>tried and tried to reproduce this, but can't seem to get
>Tris to replay this move.
>
>My first thoughts were that I should've implemented that
>stalemate guard in my endgame eval.  I read about this
>in the "Chess 4.5" chapter of "Chess Skill in Man and
>Machine."  Doing this is painfully slow, though.  I ran
>some suites with it last night, and it's ugly.

What is the stalemate guard? Don't assume everybody has read this book...



>Seems to me the stalemate should've been caught in the
>search.
>
>Do any of you have a stalemate guard in your evaluation?

No I don't. I don't understand why this would be necessary. The search takes
care of this, unless the stalemate happens after the horizon, and if you are
concerned by this you have also a zillion of other horizon effects that should
bother you more than the stalemate problem.


    Christophe



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