Author: Dan Honeycutt
Date: 19:55:39 06/15/04
Go up one level in this thread
On June 15, 2004 at 19:28:36, Andrew Wagner wrote: >I've heard it said before that it's not good to compare node counts between >engines, and that node counts aren't a good indication of strength. So, I've >been staying away from that a lot. > >The other day, I was chatting with my good friend Jaime Benito de Valle Ruiz. We >see each other a lot on ICC and compare notes on our engines. We decided to play >a fixed-depth game between our engines, to test eval strength. In the process of >the game, he noticed that my node count was ridiculously higher than his. For >example, in one position, where I was getting 277k nodes, he was getting like What kind of nodes, alpha-beta or q-search. See Bruce Moreland's discussion on q-search explosion. Dan H. >11k. Other engines varied, but no more than about 50k nodes. > >So we started doing some tests. For him, he got a huge node reduction by using >some sophisticated aspiration windows. So, my question is three-fold: > >1.) Do most engines get a similarly large reduction in nodes by using aspiration >windows? > >2.) What other techniques reduce node counts at a fixed depth? > >3.) To what extent are node counts reliable for determining engine strength?
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.