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Subject: Re: Correspondence challenge and tablebase mistake!

Author: Robert Hyatt

Date: 07:34:51 09/05/00

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On September 05, 2000 at 01:17:43, Jouni Uski wrote:

>From Franklin Campbell:
>
>I admit I'm not computer chess expert (I sincerely wish we could have
>found one to operate the compute for these games).  However, the Nalimov
>Tablebases provided to me by ChessBase USA are labeled for use with
>five or fewer pieces.  In this case we still have seven pieces on the board,
>so I haven't even removed the shrink-wrap from the case holding the
>CD-ROMs.
>
>FYI Jouni Uski


That isn't the right way to use them.  In the case of Crafty, once the total
pieces on the board gets to 16 or less, I start seeing tablebase "hits".  As a
deep search can trade all the way down to a 5-piece ending without really
trying hard at all.

If you wait until you only have 5 pieces on the board before you enable them,
it is _too_ late.  You are already won, lost or drawn, without being able to
make the decision to enter such an ending...



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