Author: Shaun Brewer
Date: 03:59:58 06/15/02
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On June 14, 2002 at 22:20:23, Robert Hyatt wrote: >On June 14, 2002 at 13:34:37, Shaun Brewer wrote: > >>Does crafty no longer take into account win/loss ratios in the book.bin file? >> >>'book random' appears to only have valid options on 0 and 1 - am I missing >>something? >> >>Thanks >> >>Shaun > > >Book random 1 says choose from the best N (you get to set N with book width N >command) moves based on percentage of the time they were played, etc. You >also get to set the formula used to set the weights for learning scores, >frequency of play, etc (book weight command). > >Book random 0 is something else. It says to find the set of known book >moves, and then do a normal alpha/beta search, but _only_ searching that set >of moves... frequencies/win-lose etc have no influence. Thanks for the reply. Firstly I must say that crafty is one of my favorite programs - due to its flexability and strength. I also have Rebel Century3, Chess Tiger, Virtual Chess so it is not just because crafty is free. There used to be Book random 2: choose from the moves with the best win ratio. Have you found that taking account of the win/loss ratio (appart from in the book creation) gave no benefit to crafty? I know you can allocate weightings to frequency, static evaluation learning and CAP score using the bookw command I was just surprised that the win-loss ration was not available. Thanks again Shaun
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