Author: Odd Gunnar Malin
Date: 09:10:57 01/17/02
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On January 17, 2002 at 11:43:26, Andrew Williams wrote: >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: ?! I think this would be correct, maybe your score for ?? could be discussed. When I see a ?? there mostly is a combination for the opponent that lead to material loss. It is good that you not score !?, ! and !!. This move don't change the score. ! and !! only change the score if the opponent don't find the right answer or this move was the only good move, often hard to find. The !? are often been translated to 'interesting' or 'a move deserving attention'. Another way to see it that I like more is as an equal game going from a possible draw to either of the player could win. Odd Gunnar
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