Computer Chess Club Archives




Subject: Re: is there any program using ken thompson databases in the tree ?

Author: Robert Hyatt

Date: 19:55:05 09/06/98

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On September 06, 1998 at 18:38:08, Thorsten Czub wrote:

>On September 06, 1998 at 14:29:27, Ernst A. Heinz wrote:
>Thanks for the information. Shredder uses them in the tree ?!?
>I forgot... (looks like my brain has some mad-cow-desease-problem... :-))
>or is shredder only using - like all others - when the database position
>is on board ?!
>>But Thompson's endgame databases are not really well-suited for interior-node
>>access because their Huffman-encoding may cause *several slow* external file
>>seeks to happen before you get to the final database value ... :-(
>This would explain why many of the other programs use the 4-stone tablebases
>instead of ken's databases...
>what a pity...

Note that I use KR*KR all the time, *=QRBNP, which is a 5 piece set of files
that handle KRP vs KR (the most common 5 piece ending I see, happening multiple
times per day on ICC...

These are probably the most useful of all the databases...

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