Author: Dan Honeycutt
Date: 23:02:28 05/06/04
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On May 07, 2004 at 00:30:52, Russell Reagan wrote: >On May 06, 2004 at 17:16:37, Dan Honeycutt wrote: > >>Would seem what you hash is more important than what you return. ie with a >>window of 1, 2 I get back a score of 50. The move at the previous ply fails low >>whether I return 2 or 50. But later I come to the same position with a window >>of 25, 26. If I have hashed the 50 I'll get a cutoff but if I hashed the 2 I >>won't. >> >>Dan H. > >Hmmm. What about the opposite? You search with a window of 1,2 and get back a >score of -50. Later you search with a window of -25,-26. If you stored a 1, you >get a cutoff. If you stored the -50, you don't. No, works the same. I cut if lower bound >= beta or upper bound <= alpha. The +50 is stored as a lower bound. If the best I get back is -50 it's stored as an upper bound so if -26, -25 shows up later I still cut whereas if I had stored the 1 I wouldn't. Dan H.
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