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Subject: Re: Topalov style computer chess?

Author: Graham Banks

Date: 16:49:31 01/26/06

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On January 26, 2006 at 17:19:43, bryan wrote:

>With Topalov showing that he will often exchange rooks for knights or bishops,
>would a chess engine ever choose to make such sacrifices?  Are the piece values
>locked at the core of the evaluation function, or would it be common to lower
>the value of a rook bewlow that of a bishop or knight depending on the position?
> Specifically, would a computer ever play 18.Rxe4 as Topalov did against
>Aronian?


I find that many of the top engines are happy to sac the exhange for positional
considerations. Fritz 9 and Fruit 2.2 come to mind in particular as doing this
most often. I've seen it from others such as Rybka also.
In one game of my currently running Super Tournament V, Fritz 9 made a double
exchange sac to go into a double bisop and pawns versus double rooks and pawns
ending!

Graham.



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