Author: Ricardo Gibert
Date: 11:46:22 06/21/03
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On June 21, 2003 at 14:14:46, Uri Blass wrote: >On June 21, 2003 at 14:03:14, Andrea Griffini wrote: > >>Sorry for the funky topic... but i wonder how do strong program >>evaluate advanced pawns. I added a bonus table for free pawns >>and multiple free pawns that get up to 300 when they're on the >>7th rank > >3 pawns is too much. >2 pawns is more logical. I would think this is too agressive. I would expect you would lose games for silly reasons this way. A pawn on the 7th could be as good as a queen or doomed to be lost leaving you pawn down (or worse if you sac to get the pawn there). That's quite a swing. A pawn on the 7th should trigger an extension that would hopefully give some clue as to what variety of 7th rank pawn you have. A static eval of less than a pawn should avoid most silly sacs. BTW, it also makes a big difference whether you are in an ending or not. In the middlegame, the pawn is likely lost. In an ending, such a pawn has much better prospects. > ><snipped> >>8/7p/5k2/5p2/p1p2P2/Pr1pPK2/1P1R3P/8 b - - bm Rxb2; id "WAC.002" >> >>Rxb2 looks obviously quite interesting even for a 1500 player :) >>but how do program get to play it ? Do they really analyze all the >>pointless checks the king will undergo or they will just consider >>"positionally" that two pawns that far are well worth a rook in >>these conditions ? >> >>Andrea > >Movei needs to analyze all the checks. >It is possible to see it by evaluation before they promote but the rank of the >pawn is not enough and you may need other factors. > >Uri
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