Author: Robert Hyatt
Date: 15:33:26 08/06/04
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On August 06, 2004 at 18:21:51, GeoffW wrote: >Hi > >My program has been playing some test games against Dorky and getting soundly >beaten, it got me thinking about my eval function which is pretty dumb and badly >in need of some chess knowledge ! > >What I noticed in some of the games was that Dorky was seeing threats sometimes >10 or 15 plies earlier than my program, as we were searching to similar depths >it could only be that Dorky has much better eval function. > >Here is one of the positions that showed this effect, material is even, but >black looks to me to be in a horrible position > >[D]1b3rk1/4qb1p/2r1pRpP/2ppP1P1/P3pQB1/1PB1P3/8/5RK1 b - - 9 44 > >My program (Black)reckoned that it was only 0.25 of a pawn down, where as Dorky >reckoned white was winnning by 2.2. > >I tried this position with a few programs, only Dorky and Crafty scored white >ahead by > 1.5 pawns. > >Any suggestions as to what the important factors are to evaluate this position >as strongly good for white ? >My program hasnt really got any mobility scoring, no king tropism and rather >basic pawn structure eval. Wondering which area I ought to try first ? > > Regards Geoff Crafty's static eval here is +1.5 as you mentioned... The primary points are (a) the f-file is open and occupied by white's three major pieces. The pawn at h6 makes g7 another weakness, not to mention being a potential passer if the h7 pawn goes away. Main problem here is king safety, with the white majors pointed right at the black king.
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