Author: Bas Hamstra
Date: 01:23:24 09/27/99
Go up one level in this thread
Hello Ed, >From one thing came another, I had a critical look at move ordering again, >made some changes, did intensive testing and there it was: 10-15% faster in >the end-game and 25-30% faster in the middle-game. Congratulations. I too notice that small changes can have large consequences. However in some positions system a is better and in some system b is better. What exactly did you change? Just avoiding playing HOOGSTENS moves? >After 18 years wrestling, fiddling and twiddling with move-ordering this is >remarkable as I expected move-ordering was close to perfect in Rebel. I wonder >how much improvement there is still left in move-ordering. I too. Maybe for positions near the root use ETC and sort accordingly? So play each move, look if the resulting position is in the hashtable. If no cutoff is possible, you could improve sorting failsoftvalues. This is something I am planning. >I don't know what a 25% speed improvement means in terms of playing strength. >Opinions are divided. I would say it gives 5-10 elo points. Others will say >15-20 and they can be perfectly right too. > >Ed Regards, Bas Hamstra.
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.