Author: Robert Hyatt
Date: 10:05:46 09/01/02
Go up one level in this thread
On September 01, 2002 at 07:41:31, José Carlos wrote: >On September 01, 2002 at 06:19:33, Alvaro Jose Povoa Cardoso wrote: > >>>>Difference is that Crafty used alpha instead of value when it re-searches. >>>>Is there any reason to use alpha instead of value? >>>>Using value which is greater than alpha seems to cause more cutoffs than using >>>>alpha. >>>> >>>>Thanks in advance. >>> >>>I do this only because it is possible to fail low on the re-search, and now you >>>have the question of whether this fail-high/fail-low means anything. I choose >>>to go to the full window so that if it fails low, I know it is not good and I >>>can ignore the fail high. This is a null-move / hashing artifact that simply >>>happens to anyone doing PVS, null-move and hashing, all together... >> >> >>Just curious, if we removed null-move, would that artifact still happen? >>In other words, would PVS+hashing cause that? >> >>Regards, >>Alvaro Cardoso > > Less often, but it'll happen. I had it in older versions of Averno (0.32 and >prior) which didn't use null-move. > > José C. Same here. Happened in early versions of Cray Blitz with no null-move, and more frequently in later versions with null-move and R=1.
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