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Subject: Re: Correspondence challenge and tablebase mistake!

Author: Uri Blass

Date: 01:59:24 09/05/00

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On September 05, 2000 at 02:15:40, Albert Silver wrote:

>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
>
>Apparently he didn't know that the tablebases are used in the search as well, so
>they are best installed on the harddisk. It would be a good idea to double check
>the past moves though and be certain Fritz wouldn't have deviated, and if so
>when the earliest time was.
>
>                                  Albert Silver

Fritz6a has a tablebase bug and I am afraid that tablebases may be counter
productive when the number of pieces is bigger than 5.

I remember cases of a strange mistakes when programs without tablebases or
Fritz6light with or without tablebases had no problem to see the right move.

Fritz6b corrected this mistake but we do not know if it has not different
problems.

The results of Fritz6a-Fritz6b nunn matches of chessfun suggest that Fritz6a may
be better inspite of the fact that we have not enough games.

Uri



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