Author: Mike Byrne
Date: 14:20:27 12/31/03
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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
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