Author: Ed Schröder
Date: 11:11:20 07/22/00
Go up one level in this thread
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
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