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Subject: Re: Tablebases Again

Author: Roberto Waldteufel

Date: 19:29:18 10/09/98

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On October 09, 1998 at 20:21:50, Robert Hyatt wrote:

>On October 09, 1998 at 18:05:18, Bruce Moreland wrote:
>
>>
>>On October 09, 1998 at 17:33:07, James T. Walker wrote:
>>
>>>Is there a practical use for tablebases like the KBKN or KBKB etc. ?  Am I
>>>making a mistake by not using all the available tablebases ?
>>>Jim Walker
>>
>>Those are probably not important.
>>
>>If you use something like KP vs K, make sure you have KQ vs K, or you might
>>experience strange behavior as the program might forget that it should promote.
>>
>>bruce
>
>
>Crafty won't even probe things like KB vs KN, it has what Ernst would call
>an "interior node recognizer" that classifies such positions as draw,
>without needing to do a probe of any kind.  So if using Crafty, you can
>delete those..., although you would need them to construct other
>databases...

Hi Bob,

These are certainly drawn for practcal purposes, but mate positions do exist, so
classifying these as draws without any testing for this could on rare occasions
overlook a silly mate in one. Do you test for this in Crafty?

Roberto



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