Author: Robert Hyatt
Date: 19:54:21 11/22/02
Go up one level in this thread
On November 22, 2002 at 06:45:30, Gian-Carlo Pascutto wrote: >On November 22, 2002 at 01:48:06, Robert Hyatt wrote: > >>It isn't what he is claiming. He claims that R=3 + verification is close to >>R=2 in nodes, and has fewer null-move failures. His data seems to support >that. >>R=3 with a depth-1 verification ought to be fairly close to R=2, just based on >>pure math. I'll leave it to you to figure out why... > >I don't really agree. > >I'm assuming you do the fairly intuitive math of 2+1=3 but things >are not so simple :) > >R=3 verif. does a R=3 search, one depth reduction on fail high (which >makes it equivalent to R=1 without nullmoving at that ply, but it is >safe because you guaranteed your opponent has no serious threat), and >R=3 cutoffs everywhere below This is not quite true. R=3 does R=3, but R=1 research, but below that research, R=3 is done _exclusively_. That does make a big difference... > >R=2 does, well, R=2 cutoffs > >It's not so obvious these are close in nodes. In fact, the paper itself >points of that the methods scale very differently. When I say close in nodes, I am referring to his data in the paper. They are reasonably close to each other in terms of raw node counts... > >-- >GCP
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