Author: Ulrich Tuerke
Date: 06:12:57 06/20/03
Go up one level in this thread
On June 20, 2003 at 07:34:03, Uri Blass wrote: >On June 20, 2003 at 07:29:35, Mike Byrne wrote: > >>On June 20, 2003 at 06:15:09, Joachim Rang wrote: >> >>>On June 20, 2003 at 05:05:24, Vincent Lejeune wrote: >>> >>>> >>>>I'm running a test with Chesstiger 15 and the Valentin Albillo test set (see >>>>http://www.talkchess.com/forums/1/message.html?301806) and what a surprise >>>>Chesstiger have a problem with the first position the well known FINE 70 (Kb1!); >>>>Crafty, Fritz, Hiarcs have no problem with this position; so why CT ? hashtable >>>>weakness, pruning weakness or somehting else ? Christophe, an idea ? >>>> >>>>>> >>>>I will publish the result for all positions later Celeron@875, 96 MB hash, 15 >>>>min/pos >>> >>> >>>DeepSjeng has also Problems. At least in beta stage when I tested the program. >>>Gian-Carlo replied to my message with the argument, that tuning an engine for >>>this position makes it weaker in general pawn endgames. I'm sure the views >>>differ on that position but maybe Theron agrees with Gian-Carlo that this >>>specific position is an artificial one. >>> >>>regards Joachim >> >>this position is a question of search not tuning... > >I think that GCP talked about tuning the >extension and pruning rules. > >I can imagine that a change in the pruning rules that is productive for other >positions is not productive for this position. > >I do not believe that it is impossible to fix the problem in a productive way >and I guess that the real reason is that in the same time of fixing the program >it is possible to do bigger improvements. I don't think that solving this position is a matter of pruning or extensions, since Comet could solve it on a 16 MHz 80386 in a few seconds. It's rather a test for hash replacement rules, i.e. handling situations where the hash table is overflowing heavily which is of course the case here. Uli > >Uri > >Uri
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