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Subject: Re: Crafty opening book

Author: Dann Corbit

Date: 13:18:35 01/31/00

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On January 31, 2000 at 09:44:09, Harald Faber wrote:
>On January 31, 2000 at 09:00:49, Robert Hyatt wrote:
>>On January 31, 2000 at 07:30:05, pavel wrote:
>>>hi hyaat,
>>>         i was wondering whats the differance between the crafty that i run on
>>>my pc with 12mb opening book; no tb and the crafty that you use in icc (with 3 4
>>>and 5 tb, 4 cpus and opening book from a million games ).
>>> so whats the differance in elo rating some 100s points?
>>>thanks
>>>pavel,
>>>
>>>others may answer this question too....pls. :))
>>>free chess programs rocks :))
>>
>>
>>The only difference between what I run, and what you _can_ run, is the
>>hardware.  I use all the 3-4-5 piece tablebases (22 gigs uncompressed) plus
>>a small opening book.  The current version is identical to the released
>>version with the exception of a couple of non-game fixes (ie the fixes do
>>not affect the engine at all...
>
>
>BTW has anyone done the conversion from the book.bin and books.bin into a
>Fritz-tree? I guess not, I don't know of any converter that does this job, and
>even creating the tree from the pgn-file does not take the priorities...

I don't think it is invertible.  The hash is stored in the book, not the
position.  You would have to write out some kind of key-file at creation time.



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