Author: Robert Hyatt
Date: 20:23:28 07/06/02
Go up one level in this thread
On July 06, 2002 at 22:29:44, Omid David wrote: >On July 06, 2002 at 10:20:17, Robert Hyatt wrote: > >>On July 06, 2002 at 01:07:36, Ricardo Gibert wrote: >> >>> >>>Okay, but so what? >>> >>>> >>>>So perhaps the idea of "forward pruning" is foreign to us as well... >>> >>>I see no logical difference between deciding which moves are interesting and >>>worth looking at and deciding which moves are not interesting and not worth >>>looking at. It looks to me like 2 sides of the same coin, so your speculation >>>that "perhaps the idea of "forward pruning" is foreign to us as well..." does >>>not seem to be of any consequence. >>> >> >>However, that has been _the point_ of this entire thread: Is DB's search >>inferior because it does lots of extensions, but no forward pruning. I >>simply said "no, the two can be 100% equivalent". > >Just a quick point: The last winner of WCCC which *didn't* use forward pruning >was Deep Thought in 1989. Since then, forward pruning programs won all WCCC >championships... In 1992 no "supercomputer" played. In 1995 deep thought had bad luck and lost a game it probably wouldn't have lost had it been replayed 20 times. No "supercomputer" (those are the programs that likely relied more on extensions than on forward pruning due to the hardware horsepower they had) has played since 1995... I'm not sure that means a lot, however. IE I don't think that in 1995 fritz was a wild forward pruner either unless you include null move. Then you would have to include a bunch of supercomputer programs including Cray Blitz as almost all of us used null-move...
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