Author: Andrew Williams
Date: 08:43:26 01/17/02
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On January 17, 2002 at 11:19:39, Odd Gunnar Malin wrote: >On January 17, 2002 at 08:29:48, David Rasmussen wrote: > >>0.50 pawns? 0.30 pawns? 0.20 pawns? >> >>Specifically, when letting Crafty annotate a game, and you want to find what it >>thinks is a positional blunder, what should be the margin? >> >>/David > >In books etc. use the move that change the score between += and = normaly be >annotated as ?! (dubious move). > >In my first chess-program I own (Zarkov 2.6 by Stanback) he was giving this >change a score of 0.2 pawn value. He gives the score between '+/-' and '=' to >0.6. (+/- -> White is clearly better or White has the upper hand.) >In normal language this change between +/= and = could be writen 'white stands >slightly better' and 'even'. > >The use in Chess Assistant seems to be between 0.4-0.5 pawn value but they have >added a definition between these two scores (+=/=). I haven't tested the CA >score because I always use symbols when analysing to not be disturbed by the >small decimal changes. > > >Odd Gunnar That's interesting. In my program's "blunder check" mode, I annotate as follows: Score drops by 0.60: ?? Score drops by 0.40: ? Score drops by 0.20: ?! In my program, "blunder check" involves making the move the program made in a game, then searching for the opponent. If the score for the opponent is much higher than PM anticipated in the game, it's a "blunder". Andrew
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