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Subject: Re: Practical Tablebases (much smaller) ?

Author: Dieter Buerssner

Date: 07:24:25 11/13/01

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On November 13, 2001 at 09:18:02, Uri Blass wrote:

>On November 13, 2001 at 09:16:09, Uri Blass wrote:

[snip]
>>Part of the 7GB is for generating unimportant tablebases of a king and three
>>pieces against a king when there is no position with king and 3 pieces against
>>king when programs cannot win.

>I mean no KXXX vs K position that is not drawn that programs cannot win(of
>course there are stalemate positions).

I agree, that kxxxk are practically useless. However, your above statements may
depend on how you define "piece", and about the implemented knowledge. If you
include pawns: KBPPK may be useful for programs, that don't know (well enough)
about draws with rook pawns and wrong B. Before I have implemented a more
general rule (with double pawns), my program showed something like +6.x for it
...

Also, for very fast games, KNNNK might be useful.

Regards,
Dieter



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