Author: Dann Corbit
Date: 22:42:15 07/24/01
Go up one level in this thread
On July 25, 2001 at 01:25:28, John Hatcher wrote: >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? Actually, I do. I have a book like that with 2.5 million games in it. I call it my "human" book, because it plays like a person. It doesn't just play stupid openings, because it knows the won/loss/draw statistics and it also discards rarely 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. You might be right. I have no idea what the OP wants.
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