Author: Dieter Buerssner
Date: 13:55:45 07/24/02
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On July 24, 2002 at 14:39:02, Uri Blass wrote: >Movei also does not use values of 1,3,3,9 but >there is also no single value to pieces. > >There are 64 numbers for every piece based on the square >of the piece. In your sense, I could say, that it is the same for Yace. Yace also uses piece square tables. >I do not know what is the meaning of the values of pawns in yace >(you said that pawn is 0.8 and bishop is 3.5) Yes, these are the default material values (not including any piece square table scores). >but my impression is that the values are misleading and the average >value of pawn is more than 0.8. > >Here is a simple example: > >Yace believes that 4 pawns are clearly more than a bishop >and that the difference is more than 1 pawn. > >New position >4kb2/pppp4/8/8/8/8/PPPPPPPP/4K3 w - - 0 1 > >Analysis by Yace 0.99.56: > >1.h3 > ± (1.34) Depth: 1 00:00:00 [etc.] Perhaps it is misleading. The positive score comes from the posional score of the pawn structure, which in this case may seem rather high (3 passed pawns, all connected). I think, many other engines will give higher positional scores here. Regards, Dieter
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