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Subject: Re: Deep Blue--Part III

Author: Vincent Diepeveen

Date: 05:43:58 05/11/98

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On May 11, 1998 at 03:25:03, blass uri wrote:

>
>On May 10, 1998 at 18:51:35, Vincent Diepeveen wrote:
>
>
>>Game II:
>
>>36. axb5!
>>
>>This is a brilliant move, which i can easily explain
>>with DB kingsafety. There are several tens of pawns needed to make
>>a program play axb5! instead of Qb6. If your kingsafety however gives
>>white a huge penalty after the line given by GM Lubosh Kavalek
>>(Qb6 Rd8 axb5 Rab8 Qxa6 e4 and the black queen gets into the white
>>position driving white king to centre with queens on the board), then
>>this move is easily explainable, supposing that DB has singular
>>extensions
>>and can see here line of about 15 half moves among which a lot of checks
>>and forced moves.
>I do not understand why did deepblue reject 36.Qb6 and if Rd8
>37.Be4
>
> Uri

If i look to the score of Qb6 in my program and then to the score of
axb5
in Diep, then the difference is few tens of a pawn.

So few king safety terms and freepawn code which says that covered
freepawns are not that well compared to a far freepawn and there you
are.




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