Author: Robert Hyatt
Date: 20:23:34 01/30/02
Go up one level in this thread
On January 30, 2002 at 14:18:47, David Rasmussen wrote: >On January 30, 2002 at 10:12:25, Gian-Carlo Pascutto wrote: > >>Why are you blindly assuming that their effective branching factor >>is 40, just because that is the average number of legal chess >>moves? You should know better. And I know you do. >> >>They used PVS. Aspiration windows. Hashtables for the first TWELVE >>plies. Even futility pruning. >> > >Futility pruning? I don't think so. Hsu hated futility pruning, even in >quiescence. > >/David They _definitely_ used futility pruning in the hardware part of the search. This was reported at several public presentations and was one of the features they turned off to slow the processor down in the famous DB vs the micros match... No idea if they used futility in the software search, but they definitely used it in the hardware part as per their discussions...
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.