Author: Anthony Cozzie
Date: 09:34:22 05/03/04
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>>The only clear statement here seems to be that Crafty is less efficient with >>nullmove is on by 3-10%, depending on the position. Even if you prove the >>results are not identical (with X probability) it is clear null move is not >>_massively_ affecting the performance. > >Not for 4 cpus. I doubt that's going to be the area where the methods >distantiate themselves much from another in the first place. The hard part >is 16, 64, 512 cpus, and there this could matter A LOT. The only data we have is for 4 cpus. We know, for 1 program, null move has a small but noticeable effect. Its your option to interpret this as significant or not (significant in the sense of "do I worry about this", not statistically, which evidentially it is). 3-10% change is IMO small enough that you could make either judgement. It seems to me like you got some reasonably ambiguous results and both you and Bob are trying to make the data fit your hypotheses. Its seems quite reasonable to me that it could matter more at more processors, but we won't know until we try ;) anthony
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