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Subject: Re: Rybka and a different evaluation

Author: Robert Hyatt

Date: 15:17:08 02/14/06

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On February 14, 2006 at 07:44:47, David B Weller wrote:

>Hello Chtistopher,
>
>You ask a very interesting question / make an interesting remark
>
>With regard to your Knight example:
>
>Certainly PST comes into play, as well as limited mobility, but I doubt most
>programs can ever justify nearly -600 points for for the sum of those [and
>purhaps other] defects.
>
>Fact is, IIRC, most versions of Crafty clamp the value of King Safety to 180!
>
>So theoretically, you could surround a king with 8 queens and the static eval
>would be -180 ! [for KS that is]

Not exactly.  There is no one "king safety" number.  There is king safety with
respect to the pawn shelter around the king, king safety with respect to enemy
pieces around the king, and king safety with respect to friendly pieces around
the king.  The scores can go _way_ beyond -180...



>
>So it is hard to identify/ define these facts without much, much code
>
>-David
>
>Look forward to more comments on this....



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