Author: leonid
Date: 11:05:58 11/16/00
Go up one level in this thread
On November 15, 2000 at 21:12:48, Michael Neish wrote: > >Okay, now here's something I just don't understand. > >On my slow 240 MHz PowerBook, the freeware programs MacChess and Sigma Chess 5.1 >reach 120-150,000 nps in the middlegame. MacCrafty 17.12 does around 20-30,000 >nps. My own program, inferior to all three, does about 20-25,000 nps. 120 or 150k on 240Mhz is really very good speed. Speed is close to Fritz that is really good in those numbers. Probably mentioned two programs have very good expectation to reach very high level in game as well. All depend how much additional work will be put into them by their author. Why some program are so good in NPS and other not, it is still half mystery for me. My guess is that program with high nodes/second numbers make a lot of search close to brute force. Difference between "brute force" search and "usual" (lot of null moves, pruning and so like) is around 40%. Leonid. >Why such a great difference in speed? I don't even see how taking knowledge out >would manage it (not that I want to do that). Just for a laugh I tried material >only evaluation, and got only about 45,000 nps. It seems impossible to me even >to reach 80,000 nps, let alone higher. > >Can anyone please explain the vast difference in speed between all these >programs? I trust that my program is not wasting a vast amount of its time, >although it's surely not optimised. > >Cheers, > >Mike.
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.