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Subject: Re: A personal thought regarding the opening books

Author: José Carlos

Date: 00:44:55 01/30/03

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On January 29, 2003 at 14:47:05, Dann Corbit wrote:

>On January 29, 2003 at 03:08:48, José Carlos wrote:
>[snip]
>>  The idea is good and I plan to do something similar if someday my program is
>>strong enough to trust such searches. But realize that every position in a book
>>is an exit position, so you need to analyze all of them.
>>  I prefer the idea of verifying book during games and then dump that into the
>>learning file so that it won't be needed anymore. IMO, learning is the way to
>>build a solid book, but not the aggresive learning some programs do in order to
>>win a match, but a more long-term learning.
>
>A good way to achieve it is with statistics.
>Store lots of information about book positions.
>Wins/Losses/Draws/Unfinished
>MCO rating
>NCO rating
>ECO rating
>Computer centipawn evaluation and depth (for several engines)
>Undeperformance/Overperformance (IOW -- when this move is played, is the winning
>expectancy in line with ELO figures or does it do better than ELO would
>estimate?)
>SuperGM preference
>GM preference
>IM preference
>
>Probably lots more could be stored.  Maybe in a real database.

  Yes, that's good information.
  I did part of that in Averno, the part related to the engine, this is: save
eval and depth, along with final result of the game and small recalculation of
previous moves according to search results and game result.

  José C.



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