Author: Ricardo Gibert
Date: 03:43:20 12/31/03
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On December 31, 2003 at 05:30:25, Mike Hood wrote: >On December 30, 2003 at 22:04:02, Toni wrote: > >>I'm thinking about the values of pieces for a chess program. I have investigated >>some engines and the values they give to pieces vary. Some examples are: >> >>ENGINE knight bishop rook queen >>Faile 1.4.4 3.1 3.25 5 9 >>Amy-0.8.4 3.5 3.5 5.5 11 >>Crafty-19.4, 3 3 5 9 >>Beowulf-2.2 3.2 3.25 5 9.3 (defult personality) >> >>I have to give values for my program and, as I'm not a strong chessplayer I >>would like to know your opinion. Are these differences important? What values >>should be assigned for the highest strength?. The same could be applied to score >>bonuses, but the list is too large. :-) >> >>Thanks >> >>Toni > >Here's another example from Nimzo 8: > >Pawn: 1.1 >Knight: 4.2 >Bishop: 4.35 >Rook: 6.85 >Queen: 12.9 > >Mr. Donninger doesn't seem to rate pawns as high as the rest of us, obviously. This is not as obvious as it seems. For example, it could be that his pawn structure scores are relatively higher than other programs making up the difference. Context matters. You can't look at just a portion of the eval and make a conclusion one way or the other. >It would be interesting to know what his piece values for Brutus are.
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