Author: Will Singleton
Date: 22:49:57 11/27/03
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On November 28, 2003 at 01:43:39, Uri Blass wrote: >On November 28, 2003 at 01:21:16, Russell Reagan wrote: > >>I had this position in a game I played tonight. Analyzing it, I found that I >>missed a draw. Ruffian took 9 seconds and 14 plies, while Crafty took 4 minutes >>and 22 plies to see that it was a draw (Athlon 2GHz). Ruffian gives a draw score >>after two repititions, so this might be why. I'm not sure what Crafty does. >> >>[D]8/8/8/1p6/8/8/pq3P2/3k2KQ w - - 0 76 >> >>While we're on the subject, what do you programmers think is the best approach >>for repetition detection? Giving a draw score after two repetitions or waiting >>until three? Or are there advantages to both approaches? > >There is no reason to wait for 3 repetition. > >3 repetitions means that the position repeats 4 times. > >it is certainly safe to give a draw score after 2 repetitions and for me even >one repetition is enough to return a draw score. > One repetition does not give a draw, by the rules of chess. Why would you return a draw score when it is not a draw? Will
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