Author: John Hatcher
Date: 22:25:28 07/24/01
Go up one level in this thread
On July 25, 2001 at 00:51:07, Dann Corbit wrote: >On July 25, 2001 at 00:36:00, Dann Corbit wrote: > >>On July 24, 2001 at 23:06:58, John Hatcher wrote: >> >>>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? >> >>That's a pipsqueak compared to some database files I know of. >>I know of one collection with 7.1 million games between rated players. >> >>>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. >> >>Prepare to be surprised. I have 380K in my tiny (highly filtered) set of 2.5 >>million games. I throw out any games with the same move sequence. There are >>lots of non-duplicate games that get clubbed from that. > >Actually, your 300K number is probably pretty good. Some of the games in the >collection are from computer/computer matches and somehow got high ELO ratings >attached. > >[snip] There is nothing wrong with having a database with 1.5 million games, or 15 million games for that matter. When Chessbase programs annotate a game for you it will searh the entire huge database and extract relevant games to insert into the annotation. That could include lots of garbage games between weak players. This games in this big database can be analyzed and filtered and searched to your heart's contenet. That is different from having an opening BOOK with 1.5 million games. Who wants an opening book with 1.3 million poorly played openings? My point is that I think the original poster misunderstands how chessbase uses databases to annotate games, and the much smaller selection of games that is used to build opening books containing (hopefully) good moves. John
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