Author: Uri Blass
Date: 03:32:01 11/20/01
Go up one level in this thread
On November 19, 2001 at 18:33:59, Gian-Carlo Pascutto wrote: >On November 19, 2001 at 18:27:14, Dann Corbit wrote: > >>On November 19, 2001 at 16:31:16, Chessfun wrote: >> >>> >>>This position came about in a game where Fritz 7 clearly >>>winning played a move which seems to lose immediately, >>>although he still don't see he is lost for a few moves. >>> >>>35...Rd5 and lost. >>> >>>Seems all Fritz versions will play 35....Rd5. >>> >>>[D]8/1p3pk1/p1p3pp/2P1r3/1P1R4/P6P/5K1P/8 b - b3 0 35 >> >>Beowulf falls for the same thing, even thinking the move to be up a full bishop. > >Funny...Sjeng gets a fail low at 5 seconds and switches away in 10. > >If I play it out, I get +0.8 in a second or 2 (for white). I suspect that the reason that you are fast in getting a positive score for white after 35...Rd5 is the same reason that you are going to get also a positive score in the following position in the first plies and it can cause you problems in different positions. [D]8/5p2/2p2kpp/1p6/P4p2/7P/2K4P/8 w - - 0 5 Crafty gets positive score for white in the first plies of that position. I suspect that Fritz is more careful in evaluating passed pawns when the other side also has a lot of passed pawns and I am not sure if it is a good idea or a bad idea. Deep Fritz can see +5.50 at depth 1 in the following position [D]8/8/5kpp/8/P7/7P/5K1P/8 w - - 0 5 If I change the square of the white pawn to b4 it can see only +1.16 so it seems that it gives a significant bonus of more than 4 pawns for unstoppable passed pawn if the opponent has no passed pawn. Uri
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.