Author: Sune Fischer
Date: 04:09:54 05/07/04
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On May 07, 2004 at 06:32:12, Tord Romstad wrote: >On May 07, 2004 at 04:10:01, Sune Fischer wrote: > >>Ie. if Movei could score 40% against Crafty I wouldn't be surprised. Gothmog has >>scored 50% in some tests I believe, > >You are probably referring to some of the match results I have reported >myself. The last couple of times I have played matches against Crafty, >the scores have been almost exactly 50%. But it should be pointed out >that the match conditions are not very fair to Crafty, for two reasons: > >1. I play my matches on a single-CPU machine, with pondering disabled. As > is well known, Crafty is seriously crippled without pondering, because > its time management doesn't work well. Perhaps it is just Gothmog that is crippled with ponder on? :) I imagine that you, like me, hasn't spent a lot of time testing with ponder on because we don't have dual machines to test on. In any case if an engine is performing like the author designed it then it's fair game. Anyway, what is different in Crafty's TM with ponder on? >2. My Crafty executable is compiled using GCC on a Linux machine. The > Windows version of Crafty is probably compiled using the Intel or > Microsoft compiler (unlike Gothmog, which uses GCC on all platforms), > which reportedly produce much faster code. Ok, but using a better compiler is not really a strength of the engine. I think using the same compiler makes a good basis for comparison since Gothmog would probably get the same kind of boost with a better compiler. >I also think it is possible that Gothmog performs better against Crafty >than against other engines of similar strength, for reasons of playing >style. Crafty's lack of king safety eval makes it rather vulnerable to >Gothmog's very aggressive play. I can't figure out how strong Gothmog is. Sometimes it appears almost to be at the Ruffian level, other times it has problems with more mediocre engines. Perhaps it really does have something to do with style, or simply too few games played and it really is somewhere inbetween. -S.
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