Author: Dan Honeycutt
Date: 10:35:00 06/28/04
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On June 28, 2004 at 12:53:17, Uri Blass wrote: >On June 28, 2004 at 12:37:42, Dan Honeycutt wrote: > >>On June 28, 2004 at 08:54:00, Anthony Cozzie wrote: >> >> >>>settings, and then N games with the new settings. I am only really interested >>>in longer timecontrols: 20 min + on an Athlon 2.0G or so (70 min on P-650, etc), >> >> >>Why long time controls? I thought you could test evaluation with shorter time >>controls, search needed longer (or varied) time controls. Am I out in left >>field? >> >>Dan H. > >I think that it is possible that the same evaluation change that is productive >at long time control is counter productive at blitz. >It does not mean that testing at short time control to test evaluation changes >is not useful but if you want to be sure that the new version is better and you >care mainly about long time control then you need to test in long time control. > >I suspect for example that a small reduction of the evaluation of pawns may be >productive at long time control and counter productive at blitz. > >The reason is that piece is usually better than 3 pawns in the middle game but >at blitz you may not have enough time to find the plan how to use it espacially >when the side with the pawn has another positional advantage that is not enough >to compensate for the piece when at long time control you may find the right >plan because of searching deeper. > >The right plan for the side with the pawns is more simple:push the pawns forward >It means that program will have less problem to find the right plan even at >blitz. > >I do not know if this theory is correct but it is possible that another theory >for another evaluation term is correct. > >Uri My evaluation covers, I think, most of the basic stuff but I don't have any more sophisticated stuff like you describe - altering pawn value based on time control or stage of the game. I feel like I should tune what I've got before I go adding more. Even with my fairly basic evaluation I have over a hundred values for penalties/bonuses. Every one of them I pulled from the sky (or some other part of my anatomy). This thing Anthony is working on sounds like it could be ideal for someone in my situation. If I can get to a decent "ground zero" then I can twiddle and tweak from there. I have lots of things that need work so I think I'm going to put evaluation aside for now and see where this leads. Dan H.
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