Author: Daniel Shawul
Date: 23:34:11 09/26/04
Go up one level in this thread
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
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