Author: George Sobala
Date: 15:36:26 12/31/03
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On December 31, 2003 at 17:20:27, Mike Byrne 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 > >Some rules I like to follow (but not always!) > >1. B+N>=R+P >2. B>=N (with bonus for Bishop pair and not many pawns) >3. abs(2B+N)-Q)< .5 or abs(2N+B)-Q)< .5 >4. 2R>=Q >5. Q>=R+B+P Piece values? Who needs them! Said tongue in cheek of course, but consider the ultimate infinitely-capable chess engine: it would not NEED any piece values, it would derive the values of the pieces from their capabilities in the game.
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