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Subject: Re: Help with position...

Author: James Robertson

Date: 18:33:53 09/08/98

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On September 08, 1998 at 21:23:43, Francois Bertin wrote:

>
>  6r1/p2Pbk2/P4p2/1B3P2/2K1p1p1/8/8/3R4 b - -
>
>  This position happened in a correspondence game I played recently.
>I played Rg5, letting White promote to queen, and then sacrificed my bishop
>on it, after which White took with rook. I was hoping that my two passed
>pawns on the kingside would give me good chances. That was quite
>speculative, to say the least and I had to concede victory to my
>opponent about 15 moves later.
>
>  However, when I put this position in Rebel 9, I was surprised to see
>that the program liked the move and even gave a small advantage to Black!?
>
>  I run Rebel on a P-90 with only 8 Mg of memory, so I would like to
>know if it would stick to the sacrifice and its evaluation when running
>on a more powerful system with much more memory for hash tables. And what
>would other programs like Fritz, Hiarc and al. play?

The Chessmaster Likes g3 with a score of 0.70 after several minutes on my P233.

>
>  Also, since this is an endgame position, what would a program using
>tablebases, like Crafty or Ferret, say?

Although this is an endgame position, there are no tablebases even close to
being able to hold all possible 13-piece endings. It would take terabytes, and
then some.

>
>                   Thanks for the input,
>                                           François Bertin



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