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Subject: Re: Crafty and pawn structure eval

Author: Robert Hyatt

Date: 19:43:00 05/15/00

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On May 14, 2000 at 18:09:20, Pete R. wrote:

>On May 14, 2000 at 08:54:35, Jürgen Hartmann wrote:
>
>>On May 14, 2000 at 08:44:57, Jürgen Hartmann wrote:
>>
>>>and ...b5 is a possibility for counter play. Frans Morsch will certainly sweat
>>>blood and tears at the moment. Small consolation that all other chess programs
>>>behave in the same way.
>>
>>Correction: Crafty 17.10/CB plays 13... exf4!, the only chance to avoid the
>>death sentence.
>
>Well, according to comments from Dr. Hyatt, pawn structure evaluation seems to
>be his major tuning focus for Crafty these days.  Clearly this is a worthwhile
>goal, since computers are already top notch at tactics.  But the consequences of
>pawn moves are often far too deep for tactical evaluation, so things like this
>have to be caught in the positional evaluation.  A program *should* be able to
>"see", just as a human can, that white has a great pawn structure and will
>continue to annex space if f5 is allowed.  Not easy to program I suppose.


Not easy...  not impossible...

Very important against these guys...  In this case you simply can't allow
the e4-f5 pawn chain to happen.  The center becomes locked, white has all
the space on the kingside, and black is constrained to live in a small shoe-
box and wait for jack-the-ripper to show up...



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