Author: Andrew Williams
Date: 09:18:09 01/17/02
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On January 17, 2002 at 12:10:57, Odd Gunnar Malin wrote: >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. Yeah. For me it's mainly a way of drawing attention to the fact that my program perhaps could have spotted a problem earlier. I don't think the ?? in my program really corresponds to the ?? by a real annotator. >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. > Yes. These sorts of annotations would require a *much* more complex approach than the one I've taken. Andrew
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