Author: Ed Schröder
Date: 12:38:28 07/22/00
Go up one level in this thread
On July 22, 2000 at 15:32:58, blass uri wrote: >On July 22, 2000 at 14:11:20, Ed Schröder wrote: > >>On July 22, 2000 at 13:28:28, blass uri wrote: >> >>>Deeper blue had a positive evaluation before trading queens. >>> >>>The evaluation of Deeper blue was based on Deeper blue's logfile >>> >>>9(6) 3 T=46 34...Qxf1 >>>10(6) 2 T=130 34...Qxf1 >>>11(6) 2 T=168 34...Qxf1 >>> >>>The evaluation when deeper blue started to ponder (hash guess Rxf1) was >>> >>>7 (4) -30 >>>7 (6) -66 >>>8 (6) -50 >>>9 (6) -50 >>>10 (6) -50 >>>11 (6) -48 >>> >>>Deeper blue lost 0.5 pawn in the evaluation and the only reason that I can >>>explain it is that it is a root processor. >>> >>>I guess that something like this cannot happen to Deep Junior because it is >>>probably more knowledge based program. >>> >>>Uri >> >>The behavior you describe is quite normal. After a queen exchange in the >>next move often other more accurate tables are used which may cause such >>score differences. I do the same in Rebel. That doesn't make the program >>a root processor. A root processor is a program that totally (or to a >>great extend) relies on the evaluation on the root. If you read the IBM >>pages it is said DB has something similar (a short investigation at the >>root). That makes DB no root processor. >> >>Ed > >I apologize if I used the wrong name but I know some top programs when there is >no behaviour of change in the score after trading queens (with the only >exception of change in the score because of deeper search) True. Ed >My experience with Junior(not Junior6 but I have no reason to believe that >Junior6 is different) and with Hiarcs or Crafty tells me that they do not change >their score after the expected move(I am not talking about a change in the score >because of deeper search). > >I also do not remember significant change in the score in chessmaster after the >expected move > >Uri
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