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Subject: Re: Piece Values

Author: Stuart Cracraft

Date: 05:49:20 08/16/98

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On August 15, 1998 at 22:18:24, Jeff Anderson wrote:

>Can someone perhaps give me a rundown of the piece values used by different
>chess programs?  How do small changes piece values in programs affect their
>play?
>Thanks,
>Jeff

Urk! Tabs in this CCC gui.... ahem.

Currently, I use these

 pawn 1000
 knight 3000
 bishop 3000
 rook 5000
 queen 11000
 king 12000 (but can be zero without affecting program)

Mobility generally values bishops and knights appropriately based on the
demands of the position (square control bonus.)

I keep two rooks lower than a queen since the program got into trouble
trading defending against a marauding enemy queen.

Also, two minors are generally worth more than a rook and pawn also
based on the demands of the position (also square control bonus.)

I don't change piece values during the game (and wouldn't!)

--Stuart




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