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Subject: Re: Evaluation testposition

Author: Scott Gasch

Date: 10:17:36 03/20/02

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On March 20, 2002 at 12:59:58, Gian-Carlo Pascutto wrote:

> 4r1k1/pp2q1p1/2p1P1Q1/3p4/6R1/P7/KPP5/8 w - - 0 17
>
>I get a static eval of +3.7 here, which drops a little
>bit after searching a minute or so (to +3.2).
>
>Shredder Paderborn stays around +0.5 - +0.7
>
>Fritz 7: about +1.2 to +1.4
>
>Crafty 18.13: +0.30 to +0.40
>
>Comet B41: rises to about +1.5
>
>Hiarcs 7.32: rises to about +1.0
>
>ChessTiger 14.0: starts from 0 and goes to +0.40
>(Gambit Tiger very similar)
>
>Gandalf 5.1: +1.0 to +0.80
>

Wow.  My static eval for white here is -0.5 pawns.  With a search the engine
thinks it can force a draw and is happy to do so.  As for _how_ I evaluate it,
the major component of the eval is the white passer.  However it's blockaded by
an enemy piece sitting on a square controlled by the enemy so it has no prospect
of advancing.  That chops down the bonus to that passer severly.  I do give some
credit to white for aiming its rook/queen at the enemy king but monsoon does not
understand the mate threat it poses.  I think my eval here is just as skewed as
sjeng's, just in the opposite direction.  Do you actually evaluate the mate
threat?

Scott



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