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Subject: Re: Crafty

Author: Joshua Haglund

Date: 21:14:10 11/30/02

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On November 30, 2002 at 23:33:18, Robert Hyatt wrote:

>On November 30, 2002 at 12:23:39, Joshua Haglund wrote:
>
>>Robert,
>>
>>What is the intention of limiting the position.bin file to 1 mb?
>>
>>Is it possible for you to make the limit 2 mb in the next release?
>>
>>How much "learn" do you have, and will you share it? ;)
>>(book.lrn && position.lrn)
>>
>>Thanks much,
>>
>>Joshua
>>toneewa@yahoo.com
>
>
>I limited it to (I think) 65536 positions.  For several reasons.
>
>1.  that kind of learning is very time-dependent.  It is really intended
>to solve problems caused where a clever opponent takes you out of book really
>quickly, then "feels" his way around to a winning-type position and then tries
>it repeatedly on a chess server to inflate his rating.  This kind of learning
>makes that _very_ difficult to do in a series of games.
>
>2.  The data is stuffed into the hash table as "permanent" entries.  If the
>file gets bigger, then you lose hash table entries, for positions you will
>probably never see anyway.
>
>I don't publish the position.bin learn files as they are very opponent-specific
>and also _highly_ version-specific since they contain specific evaluations and
>search results that a different version might disagree with...
>
>I delete mine weekly, for example....

Thanks for your reply!

How about your book_lrn file?

If it isn't any trouble I wouldn't mind your position.lrn files. :)

Joshua
toneewa@yahoo.com




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