Author: Vincent Diepeveen
Date: 05:11:40 04/26/01
Go up one level in this thread
On April 26, 2001 at 07:50:25, Uri Blass wrote: >On April 26, 2001 at 07:31:42, Vincent Diepeveen wrote: > >>On April 26, 2001 at 02:37:39, Uri Blass wrote: >> >>>game 1: >>> >>>In this position >>>R7/3r2k1/4b1p1/P2N3p/5P1P/3K1BP1/5b2/8 w - - 0 1 >>> >>>Deep Fritz played 56.Kc4 0.47/15 Rc7 57.Kb4 0.28/16 Rd7 and the following >>>position happened >>> >>> >>>[D]R7/3r2k1/4b1p1/P2N3p/1K3P1P/5BP1/5b2/8 w - - 0 1 >>> >>>Deep Fritz played 58.Nb6 0.09/16 time when it pondered 8:57 >>>and used 1007 knodes per second. >>> >>>I believe that it is a mistake in the time allocation of Deep Fritz. >>>It should use more time for 58.Nb6 and the time of pondering was not enough. >>> >>>The following facts are obvious: >>> >>>1)Deep Fritz had a possible move that force repetition(58.Kc4) >>>2)The score of Deep Fritz dropped and was only slightly above 0 >>> >>>I believe that programs should use more time in these situations. >>>The time control was 40/90 and it means that Deep Fritz probably had more than >>>45 minutes to calculate and in this situation that is not common I would prefer >>>to use at least half of them. >> >>Oh this is not a matter of time division, i think Fritz time division >>is more than ok. It's about evaluation here. > >I agree that Deep Fritz evaluation was wrong but deeper search could probably >avoid the error because Deep Fritz's evaluation was negative in the next move. > >It could suspect that something is wrong in the evaluation because the score was >positive and went down. > >It could also repeat the same position and I think that both of these factors >should convince it to use more time in the relevant position(you cannot get >evaluation that is always right and if you have possible repetition and a reason >to suspect that the evaluation is wrong then using more time is a good idea). > >Uri My endgame evaluator isn't *that* great, but it just needs 8 ply to see what deep fritz probabl doesn't see the first 16 plies. Searching deeper is always cheap to say, junior is winning all those games because even a preprocessor with some knowledge is better as a non-preprocessor without any king safety! Deep Fritz beats shredder bigtime though, so i guess it's tuned for shredder too much! Best regards, Vincent
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.