Author: Vasik Rajlich
Date: 03:11:14 03/15/05
Go up one level in this thread
On March 14, 2005 at 15:04:22, Tord Romstad wrote: >On March 14, 2005 at 10:25:15, Daniel Mehrmannn wrote: > >>bob says right, you must find your own way which size is good for your engine. >>It depends on our eval. For example my engine have at the moment not a good >>eval, so i use 50 window. > >And my engine, it seems, has the worst eval of them all. Aspiration windows >simply don't work for me, regardless of their size. Glaurung does not use >aspiration windows at all. > >Tord The main issue is how much alpha-beta based selectivity you do. As soon as you create an artificial window (ie. not the "true" window), you are using potentially wrong alpha-beta values to prune with. The simplest example: a small aspiration window can cause a null-move search to fail high, when the null-move search would not fail high with the "true" window. Anybody who has used MTD (f) is well familiar with this - it's interesting to see that you've now gone to the other extreme. Vas
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.