Author: Uri Blass
Date: 22:16:20 04/10/01
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On April 10, 2001 at 16:11:25, Ulrich Tuerke wrote: >>> >>>1) material score + highest positional advantage seen for this side >>>2) material score - highest positional advantage seen for the other side >> >>So i would need after a few ply a window >> >> materialscore + 20000 >> >> materialscore - 20000 >> >>pawn = 1000. > >Come on, Vincent. You can't be serious. Do you want to make us believe that you >give purely positional scores in size of 20 pawns ? There is one case that can justify more than 20 pawns positional score. If part of your evaluation is to check if the position is a checkmate or if there is some kind of checkmate threat that cannot be stopped in special cases(for example if white has a queen at h6 and a pawn at f6 and black has a king at g8 and a rook at f8). Finding it by evaluation may be faster than seeing it by search because you do not need to generate all the moves in order to find that it is impossible to prevent mate but only moves that are checks or moves that protect g7. 20 pawns are practically enough but 10 pawns may be not enough because it is possible that white sacrificed a lot of material to get this structure. Uri
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