Author: Robert Hyatt
Date: 21:35:38 10/17/02
Go up one level in this thread
On October 17, 2002 at 23:35:58, martin fierz wrote: >On October 17, 2002 at 04:51:28, Christophe Drieu wrote: > >>[D] 8/4k3/4p3/pp5p/6p1/2P2rP1/PPK2R1P/8 w - - 0 1 >> >>Rxf3 ! > >for all those who find Rxf3 in the first position, how about a slightly modified >version: > >[D] 8/4k3/4p3/1p5p/p5p1/2P2rP1/PPK2R1P/8 w - - 0 1 > >this time, Rxf3 will not win any more. if your static eval just more or less >"randomly" thinks the first position is a win for white after Rxf3, does it also >realize that the second one is not a win? > >i think this also explains quite well why the first position is difficult for >engines: since the second, *very* similar position is not winning, you will have >some trouble to formulate a rule why the first is and the second is not winning >:-) > >aloha > martin \ Crafty for the first position, static eval is +.63, for the second -.30.... It likes Rf3 in the second but the score is only slightly positive for white. At 11 seconds it drops to draw score, and at 48 seconds, Rf3 is slightly negative. At that point, it still plays the move as best, but the score hovers around the draw score, just on either side...
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