Author: Scott Gasch
Date: 10:49:31 12/23/02
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On December 23, 2002 at 08:33:09, Vladimir Medvedev wrote: >I have read "version history" files of some open source programs. >Almost all authors mention solving WAC002 as some of milestones on their way :) > >Currently my program GreKo can solve WAC002. The common-known clue is to give >some bonus for two far connected passers. My personal opinion about WAC.002 is that it may be a mistake to assign too high a value to connected passers vs. KR. Surely a bonus is in order but I believe that if you give them such a heavy bonus so as to solve WAC.002 in 8 ply or so you are making a mistake and will weaken the engine overall. I think the way that WAC.002 should be solved is to have a promotion move on the PV when you switch to Rxb2. If you want to do this at ply 11-12 you will need some passer push extensions. > >The question is, what is the compromise value for this bonus? > >When I set this value to 350, my engine finds the solution very quick (at depth >of 8-9, depending on other parameters), but this leads to some "strange" moves >in practic games. > >Now I use default value of = 275, and GreKo still can solve WAC002 - but at >depth of 12. I think that "strange sacrifices" in middlegame became much more >rare. > >What is your experience with different values of this parameter? Good luck, Scott
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