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Subject: Re: EGT-compatibility of Chess Engines

Author: Angrim

Date: 12:45:49 04/04/03

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On April 04, 2003 at 10:53:58, Tony Werten wrote:

>On April 04, 2003 at 02:10:35, GuyHaworth wrote:
>
>>
>>I don't think the very latest Fritz/Shredder versions deal with Eugene Nalimov's
>>multi-part file-format, even though they handle 6-man in the previous format.
>>
>>Rafael Andrist's WILHELM, rich in endgame-function, at
>>http://www.geocities.com/rba_schach2000/overview.htm
>>
>>does, and will MD5sum-check the files against file-corruption.
>>
>>
>>The scope, type and even the format of EGTs is changing.  EGTs to non-DTM
>>metrics could be more useful and are smaller.
>
>Could you elaborate on that ? How are they smaller ?
>
>Tony

The number of entries in the table is the same, but DTC data compresses
better, so after compression the tables are smaller.  DTC compresses
better because positions where white can capture usually have a DTC
value of mate in 1, while with DTM the value is much less predictable.

I seem to recall that for suicide chess, and with my compression method,
the savings from DTC were around 20-30% smaller files.

Angrim



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