Author: Uri Blass
Date: 00:10:49 09/27/04
Go up one level in this thread
On September 27, 2004 at 02:34:11, Daniel Shawul wrote: >On September 27, 2004 at 02:17:24, Uri Blass wrote: > >>On September 27, 2004 at 01:58:56, Daniel Shawul wrote: >> >>>On September 26, 2004 at 00:17:07, Sergei S. Markoff wrote: >>> >>>>There are a lot of positions with total 1 pawn on the board and equal piece sets >>>>of both sides. If weaker side have 2 or more minors or (majors&&minors) then the >>>>position is drawn in most cases. You must also use king position analysis to >>>>improve this knowledge. >>>> >>>>The same to 1 pawn vs 2 pawns with no passers. >>>> >>>>This knowledge not help a lot, but after 2 weeks I make a version of ST which is >>>>a little stronger than w/o this knowledge. >>>> >>>>I need your results to compare. >>> >>>same thing here.Mine also is better without the RPKRK evaluator. >> >>Sergei did not talk about KRPKR evaluator so I do not understand what you mean >>by same thing. > > ok i see Rook < 2 minors. Anyway i think what he said can also be applied >for rook pawn ending too. > > > >>>After seeing my engine loose agaisnt Movie (whit i think doesn't have this fn) , >>>I disable the evalator and just scale down the normal score by 1/2. >>>Ditto for queen pawn ending, and opposite color bishop ending. >>> >>>daniel >> >>I have no special evaluator for KRP vs KR >> >>I do similiar thing to dividing the score by 2 when there is a single pawn in >>the board and when both side have equal material except the pawn I simply reduce >>the score of the better side. >> >>Here is the relevant code from movei >>score is the score from white point of view. >> >>if (numpawns[LIGHT]+numpawns[DARK]==1) >> { >> if (valpieces[LIGHT]==valpieces[DARK]) >> { >> if (numpawns[LIGHT]==1) >> score-=60; >> else >> score+=60; >> } >> >>Uri > But you don't give a draw (0) score here. And what sergie is talking >about is giving a 0 score. I did and it lost against movie_178 on rook pawn >ending which doesn't. >daniel Of course I do not give draw scores unless it is clear that it is a draw or I evaluate the chances as equal. Uri
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