Author: Uri Blass
Date: 14:15:45 11/18/01
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On November 18, 2001 at 16:48:08, piet de hoop wrote: >On November 18, 2001 at 15:54:23, Marc van Hal wrote: > >>On November 18, 2001 at 10:03:15, piet de hoop wrote: >> >>>The next position occured in Diep versus Rebel Century 4 round 6 of the Dutch >>>Open Computer Chess 2001 >>> >>>[D] 8/6p1/3k3p/8/3K4/7P/8/8 b - - 0 43 >>> >>>The result was a draw, but for some computerprograms I tried, the evaluation was >>>from -1 to -3.4 pawn. (Fritz 6.0, Crafty,Yace) >>> >>>I expect that programs equipped with the right pawntable base have no problem >>>with this position, but i expected that programs without these tablebase while >>>calculating over 30 plys or more should give the right evalution? >>> >>>Or do i miss something? >>> >>>Piet >> >>I think you mis something important here >>Todays decent chessprograms use table bases so the chance that such a program >>does not comeup with the right answer here is zero. > > >Ok,but there are still decent programs that don't use the table bases. > >Anyway this is relatively an "easy ending", it is just counting. > >And when a program doesn't have the knowledge of this kind of ending, it just >evaluates it as a positive ending way before in the search tree and it will >exchange all the pieces just to go for it and discover in the end it is a draw! >While in case it has knowledge about it, it won't exchange pieces and try a >different route for a possible win. > >Piet You are right in the case that the program does not use tablebases but today all the top programs use tablebases including the KPP vs KP and not only in the root. Uri
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