Author: Robert Hyatt
Date: 08:42:46 11/16/00
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On November 16, 2000 at 10:43:42, Uri Blass wrote: >On November 16, 2000 at 10:29:02, Robert Hyatt wrote: > >>On November 16, 2000 at 09:14:38, Peter Berger wrote: >> >>>On November 16, 2000 at 09:07:23, walter irvin wrote: >>> >>>>to me programs fall into 2 list bean counters and knowledge based . >>>>bean counters >>>>fritz >>>>junior >>>>nimzo >>>>lg2000a >>>> >>>>knowledge based >>>>shredder >>>>hiarcs >>>>rebel >>>>tiger >>>>diep >>>>crafty >>>>king >>>> >>><snip> >>> >>>Could you post an example for a position where for example Crafty shows superior >>>chessknowledge compaired to Junior ? >>> >>>pete >> >> >>Since I don't have any commercial program, I can't test them, but here is one >>simple test, just for fun. Evaluation after 1 ply search... >> >>[D]4k///3pp/1P4P///4K w >> >>This is just one test, of many. The idea is that last year, a GM friend of >>mine tried this against a couple of well-known programs, and both preferred >>black with the two connected passed pawns. This would be correct if there >>were lots of pieces left on the board. But in this position, the white king >>can stop the black pawns easily. The black king has a problem. >> >>It would be interesting to see how other programs handle this. My static >>eval is +1.5, for instance, although a 1 ply search will produce the same >>score, approximately. >> >>If you want, we can try a few of these for fun, for anyone willing to >>participate. I hate to give away all my 'secrets' of course, but since Crafty >>is open source, nothing is really secret. :) > >The evaluation of my Junior5.9 after 1 ply search is +0.58 for white >The evaluation of hiarcs7.32 after 1 ply is +5.27 for white >The evaluation of fritz5.32 after 1 ply is +0.03 for white > >I think that it is better to take the following position for testing > >[D]4k3/8/8/3pp3/8/8/1P4P1/4K3 w - - 0 1 > >Uri suits me. zero ply search = +.80... one ply search = +1.10 etc..
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