PGN Files for Opening Book

[cms271828]

Hi, I'm building a large opening book.

I was using a pgn file with 1.7 million games, but after scanning through them, theres quite a few mistakes in some games(algebraic notation has errors), and some games contain no moves at all.

Can anyone recommend a large collection of pgn files covering a broad range of openings. I'm thinking 1-1.5 million games which I can store on server database for my engine to use.

Thanks

[Jim Ablett]

Hi, I'm building a large opening book.

I was using a pgn file with 1.7 million games, but after scanning through them, theres quite a few mistakes in some games(algebraic notation has errors), and some games contain no moves at all.

Can anyone recommend a large collection of pgn files covering a broad range of openings. I'm thinking 1-1.5 million games which I can store on server database for my engine to use.

Thanks

Hi Colin,

Norm Pollock has some excellent pgn collections and also some superb pgn tools for cleaning up and processing pgn files on his site >

http://www.hoflink.com/~npollock/chess.html

Jim.

[cms271828]

Thanks, I've decided to use 1.1 million games from here instead...
http://www.pgnmentor.com/files.html#openings

Thats about 6.8 million positions.

Feel free to use the opening book I built from them...
http://www.colin-java.co.uk/J-C4/ChessOB.htm

Theres an applet to explore the moves, the top 4 for each position is stored in MySql database, and the most popular is shown in red in the applet.

To use with an engine, you need to pass the FEN for the position as POST parameter to the servlet www.colin-java.co.uk/JC4/BookServlet, this should return a list of moves, or "NONE".

Let me know if there are any ideas for changes/improvements, thanks.[/url]