Author: Robert Hyatt
Date: 11:11:50 11/10/03
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On November 10, 2003 at 13:47:15, Andreas Guettinger wrote: >On November 10, 2003 at 12:36:46, Robert Hyatt wrote: > >>I tend to use 50 as the normal number for my books. But it is probably >>irrelevant if you use the "played N times" value. IE here is the way I >>build the book I use on ICC: >> >>book create file.pgn 60 10 50 >> >>This says create a file with each line being no longer than 60 plies, >>each move played at least 10 times (at least 10 games have this move >>in this position played) and at least 50% of the games were won by the >>side to move. >> > >Hmm. 50%?? Does that mean Crafty dosen't know Kings Gambit? :) No. Sorry. Bad choice of wording. the 50 means that if there are 100 games played, then there must be at lease 1/2 (50%) as many games won as there were games lost. IE if there were 50 games lost, then the move will be kept if there are 25 games won. I don't know why I wrote it like that, as it seems insane. But it seemed good at the time. It is just impossible to explain it correctly. It is on my list to change. :) > >Maybe I understood sth wrong about the percentage. Does this only invluence if >Crafty will actively _play_ the moves that have a value above 50% but still >_knows_ the other moves? > > >>That makes the book fairly reliable, and also fairly small. >> >>That's how the book.bin file on my ftp machine was made from the >>enormous.pgn file also located there. This produces a 13 mb book >>file which is managable and pretty reliable. >> > > >cu >Andreas
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