Author: Steve Coladonato
Date: 04:53:27 11/22/04
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On November 22, 2004 at 05:49:05, Laurens Winkelhagen wrote: >On November 21, 2004 at 19:49:42, Steve Coladonato wrote: > >>On November 19, 2004 at 15:45:51, GuyHaworth wrote: >> >>> >>>Confirmed: Marc has done KRPKBP and Eugene has done 19+ 3-3p EGTs but not this >>>one. >>> >>>1-0 maxDTM = 166 wtm and 153 btm: 0-1 maxDTM = 103 wtm and 104 btm. >>> >>>g >>Guy, >> >>I'm not familiar with tablebases and I don't understand your score. I am >>reading it this way: maxDTM = Max depth to mate >> wtm = white to move >> btm = black to move >>What I don't understand is the 1-0 and 0-1 score. Could you explain it for me? >> >>Thanks. >> >>Steve >My guess: > >Because there is a difference between the white and black side, it makes a >difference which side mates. The above score tells us that the biggest maxDTM is >when the white (KRP) is to move and to win. > wtw btw >wtm 166 103 >btm 153 104 > >It seems logical that if black (KBP) is to win, then the mate should be shorter, >because one may not give white a chance to take the pawn with the rook. >Obviously this is easier when the pawn is closer to promotion. > >One puzzling thing left is that it makes a big difference for white to mate if >black is to move or white is. One would expect only a difference of 1, not of >13. It probably has something to do with going over into a different tablebase? > >Regards, Laurens Laurens, I thought the purpose of the tablebases was to provide "best" move evaluation of a position. In which case, only one side [either white or black but not either] would win or it is a draw. I suppose the starting position could enter into which side will win and perhaps that is why the above shows statistics for either side winning. Steve
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