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Subject: Re: King and pawn game tuner for your program

Author: Dieter Buerssner

Date: 10:13:57 06/28/02

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On June 28, 2002 at 03:32:35, Gian-Carlo Pascutto wrote:

>Robert, do you have any idea why Crafty does so well here?

I don't know how Crafty does it. I would guess that a rule including: A K is
helpless to stop 2 passed pawns at least 4 files apart (for example a/d). So one
could give really large positional scores for this. I have somewhere some code
for it, with which I was not happy already. Quite a long time ago the sharp eyes
of Carlos Pesce had seen rather deep in the PV that a winning score of Yace was
accompanied with a losing line, just because of this. I tried a fast hack, but I
did not try to tune it in or check yet.

Passed pawn extensions (not only when pushing to 7th rank) may also help here a
lot.

Regards,
Dieter



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