Computer Chess Club Archives




Subject: Re: Static evaluation after the "Positional/Real Sacrifice"

Author: Ulrich Tuerke

Date: 06:21:29 12/03/99

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On December 03, 1999 at 09:13:48, Dusan Dobes wrote:

>On December 03, 1999 at 08:49:19, Andrew Williams wrote:
>>Over the last few days, I have been fascinated by the discussions on CCC
>>about positional sacrifices. Some of the discussion has centred on the value
>>assigned to the attack that is obtained after the sacrifice and I was wondering
>>how other programs evaluated the position after Hossa's sac:
>>r3q1k1/ppp1rp2/2n1b2Q/8/2P5/3B4/PPP2RPP/5RK1 b - - 0 2
>>This is after 1. Bxh6 gxh6 2. Qxh6 from the original position posted by
>>Peter McKenzie. PostModernist's static evaluation of the position is presented
>>below. Essentially, it thinks that White is winning by 0.71. The ATTACKTOTAL
>>score is generated by analyzing the squares around the King to see how many of
>>them are attacked and what sorts of pieces are attacking them. Please note that
>>not all the factors that contribute to PM's score are included in the output
>>Could other programmers post similar information? I believe that even an
>>overall static evaluation would be interesting.
>>Andrew Williams
>Phalanx XXI static evaluation scores this position as +3.05 for white.
>Material gives -1.5, black king safety +5.76.

You say that this large value is given without search and without static
exchange evaluation. I think that this is a very daring evaluation. Isn't it ?

>Dusan Dobes

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