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Subject: Re: a question about list of opening lines ordered by popularity

Author: Uri Blass

Date: 15:06:30 02/10/03

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On February 10, 2003 at 14:33:21, Robert Hyatt wrote:

>On February 10, 2003 at 13:39:05, Uri Blass wrote:
>
>>I am interested if someone cared to do a program to find
>>a list of lines that lead to chess positions ordered by the popularity of the
>>position
>>
>>The idea is to take a big pgn of games and to order positions based on the
>>frequency of the position in games(the initial position is position number 1
>>with frequency of 100% because it happens in 100% of the games)
>>
>
>This is how Crafty's opening book is done, in fact.  That is what the
>"percentages"
>mean.

The point is that I never saw lines ordered in that way(the most close thing
that I saw are Fritz's book or shredder's book but it only give me the number of
games for every move in theoretical positions and not a list of lines ordered by
frequency).

I do not know what Crafty does but the question is if it generates a file when I
can look in the relevant lines.

It may be important to investigate problems of programs with the opening without
book because I want my program to find good moves without book and knowing the
most common positions that it fails is important for me because
it is possible that I may discover some pattern and by fixing my program I may
reduce the number of mistakes significantly.

Uri



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