Author: Ernest Bonnem
Date: 13:55:31 06/25/04
Go up one level in this thread
On June 25, 2004 at 16:46:31, Dann Corbit wrote: >On June 25, 2004 at 16:36:19, Stuart Cracraft wrote: > >>Just a note that I got my hashing working in a >>quick hack program I've put together for other >>reasons and it was nasty even though I've been >>through it over and over through the decades. >>I empathize with other hashers who have felt or >>are feeling hashed. >> >>It is well worth it. A typical 8 ply search early >>in the game might reduce 50%+ in total nodes searched >>and 50%+ in total time. >> >>These are dwarfed by null move's effect though in >>the same positions (90% and 90%). >> >>So my question is, these are well-known methods to >>substantially reduce the number of nodes and amount >>of time for most searches -- I wonder if there is >>anything else that is as large and as comparable >>at these large 50%/90% types of reductions. > >What is your branching factor? > >The best programs have a branching factor between 2 and 3. > >If you already have a branching factor in that range, do not expect any more >really dramatic speedups. To be noted : Shredder 8 has a branching factor very near 2 on most positions, probably the best (lowest) of the top engines
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