Author: Uri Blass
Date: 12:55:55 10/25/02
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On October 25, 2002 at 14:46:24, James Swafford wrote: >On October 25, 2002 at 14:29:59, Uri Blass wrote: > >>On October 25, 2002 at 13:11:44, Robert Hyatt wrote: >> >>>On October 25, 2002 at 12:39:38, Ingo Lindam wrote: >>> >>>>Hello, >>>> >>>>I repost my former post under this new title just hoping to encourage >>>>more people to join the discussion: >>>> >>>>I am new at the Computer-Chess Club and would like to discuss some >>>>suggestions for (a new generation of) chess knowledge using (and >>>>generating?) chess engines. During my time at the university and at my >>>>first job after making my exams in computer science I was involved in >>>>statistical speech/pattern recognition and machine translation. That >>>>might atleast a reason for some of my ideas. >>>> >>>>I am not sure whether these suggestions have never been made or just >>>>named to be impossible to implement. (I am sure they are not.) >>>> >>>>I would really like to see the computers measure a position rather in a >>>>set of probabilities e.g. (P+,P=), where >>> >>> >>>I think that if you look at what chess programs do, this is the essence of the >>>evaluation. The larger the number, the greater the probability that side will >>>win. The smaller the number, the greater the probability that side will lose. >>>Scores near zero imply draw, of course... >> >>Not exactly. >> >>You can translate pawn to expected result but not to probabilities. > >It is trivial to translate a pawn score to a probability of a win. No it is not trivial. If the score is 0.00 what does it mean? Does it mean that you are sure of a draw or does it mean that both side have 50% chances to win? Can you translate? >Any number of functions in which the two are directly related may >be picked. Obviously, some are better than others. > > >> >>The expected result is the same in the following 2 cases: >>probability 1% win for white and 98% draw >>probability 40% win for white and 20% draw. >> >>The probabilities are not the same. > >So? That just means the pawn scores shouldn't be the >same, either. In both cases the expected result is 50% but in the first case you are almost sure about a draw when in the second case the position is less clear and both sides have good chances to win. Uri
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