Author: David Dahlem
Date: 11:44:18 01/13/05
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On January 13, 2005 at 14:39:35, Norm Pollock wrote: >On January 13, 2005 at 12:58:47, David Dahlem wrote: > >>Hi Norm >> >>I'm currently downloading your pgn database from Peter Skinners site. Could you >>provide details on how you filtered this database? >> >>Thanks >>Dave > >Games are from jan 1, 2000 to present. Sources are TWIC and ChessCollect > >Filtered out (as best as possible) using Scid 3.61 and pgn-extract: players >under 2400 elo, games with [FEN (includes FRC), blindfold, blitz, rapid, >lightning, simultaneous, email, twins and duplicates, computer engines, 20 moves >(40 plies) or less, games on the Internet (ICC, FICS, playchess, IEC), unusual >ratings or unusual names. > >And of course you have the option of filtering out even more. > >Stripped out excess tags. > >Some suggestions for book builders: >Use a high number of occurrences if you are building a book. I recommend 12. Do >not use book learning if multiple engines share the book. The two book approach- >a white book and a black book is better than the 1 book approach. That is >because you can build the white book just from games that white wins/draws, and >build the black book just from games that black wins/draws.
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