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Subject: Re: crafty book.lrn position. lrn

Author: Robert Hyatt

Date: 13:52:40 07/09/00

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On July 08, 2000 at 09:46:16, Marc van Hal wrote:

>On July 06, 2000 at 22:06:33, Robert Hyatt wrote:
>
>>On July 06, 2000 at 18:58:37, walter irvin wrote:
>>
>>>    i put several crafty's in my engine dir in junior .when i put them in there
>>>all there was was a .exe file .now there is a .lrn file .just how is the lrn
>>>file generated and how does it determine what goes in it?? how big can the file
>>>get????
>>
>>
>>Book.lrn can get arbitrarily large.  It is the "export" version of everything
>>your crafty has "learned" with respect to its opening book.
>>
>>Position.bin has a finite size, although offhand I don't recall the max size
>>(it is small, however).  It is used to remember positions where the score
>>dropped dramatically during a game, so that if you play the same game again,
>>it will see the problem quicker...
>
>All I can say this is an intresting idea
>So if the book fail to find the best moves the first time maybe it finds it
>after 20 times instead of dropping the line.

No... there is _no_ line to drop.  IE your opponent plays 1. h3 to take you
out of book.  Then he keeps trying different things until he finally beats
you.  He then repeats that over and over.  This approach prevents that from
happening...



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