Author: Stuart Cracraft
Date: 14:29:21 06/02/98
Go up one level in this thread
On June 02, 1998 at 15:24:35, Robert Hyatt wrote: > >my position file has 65536 entries, and is "wrap-around" once it fills >up in a FIFO ring buffer. However, I *never* let it fill up, because I >delete it regularly. > Why do you delete it regularly? Seems to me there's valuable "experience" in that file. Why not add a field "frequency" that shows how frequently in real games the given position has been visited. Then, when the file fills up and becomes a burden to the regular hash table, clean out the ones with frequency=some_low_number? > >this sort of learning was added so that if someone finds a quick exit >out >of book, book learning won't work. This at least gives it a chance to >not >play into the same lost game over and over. I only learn positions from >the first 10 non-book moves before turning it off... Someone forcing the program to play the same lost game over and over whenever the same opening moves are played is a significant problem especially when having a program play on the Internet Chess Server or in a computer vs. computer tournament. I've seen it a few times and am sure you've seen it quite a bit. Kinda negates the value of the server for testing research if some joe knows how to get free rating points without really beating the program each time. --Stuart
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