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Subject: Re: How to build a ChessBase database from a large PGN file..

Author: John Hatcher

Date: 20:06:58 07/24/01

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On July 24, 2001 at 20:57:16, Dann Corbit wrote:

>Not for me, it was asked in this message:
>http://www.icdchess.com/forums/1/message.shtml?180953
>
>Since the header of that message is not descriptive of the actual problem, I
>thought I would start a new thread so that the OP might find the answer.
>
>I'm pretty well ignornant when it comes to CB.

In all seriousness, why would anyone want to build an opening book from 1.5
million games?  Surely, 1.3 million of the games would be between Joe Blow and
Norm Nobody.  Who cares what they played in the opening?  I would be very
surprised if all the recorded games between International Masters and
Grandmasters totaled more than 300,000 games.

I extracted, from a database of 1.5 million games, all the games where both
players have an actual, or historical (e.g., Capablanca), rating of 2500+
There are only about 100,000 games in that book.

I wouldn't want a book comprised of 1.5 million games.  There'd be a lot of
chaff with the wheat.

John




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