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Subject: Re: Arasan-Postmodernist match

Author: Andrew Williams

Date: 10:36:57 03/08/04

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On March 08, 2004 at 13:10:29, Frank Phillips wrote:

>On March 07, 2004 at 17:22:24, Andrew Williams wrote:
>
>[snip]
>>>
>>>What exactly did you change?
>>My preferred book is a series of lines like this:
>>
>>e4!! c5 Nf3!! d6 d4!! cxd4 Nxd4!! Nf6 Nc3!! a6 Be3!!
>
>
>I am interest in your scheme for a preferred book.
>
>Do you parse the algebraic moves at runtime?
>
>I have a preferred book, but is no more than a set of hash codes that I look in
>first before looking in the wider book.  (So play the move, see if the hash code
>is in the preferred book and if so play that in preference to the wider book -
>sort of thing.).  The disadvantage of course is that I have to regenerate the
>preferred book hash codes for any change to a preferred move.
>
>Frank

Nope, there's a pre-processing step. From the commandline you do (windows):

postmodernist.exe makepref book/preferred.txt book/preferred.bin

This converts a text file similar to the one above into a binary file, which PM
uses during games. There's no way to update this on the fly. It sounds pretty
similar to what you're doing, with the preferred book taking precedence over the
bigger, statistics-based book.


Andrew




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