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Subject: Re: bean counters

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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