Author: Sune Larsson
Date: 12:51:55 11/11/01
Go up one level in this thread
snip >> Problem or not - Fritz7 doesn't seem to recognize the mate in 8, but >> instead shows mate in 13 and this after several minutes thought. >> The NoMMX version instantly sees the mate in 8. Just queer, or?! >> >> Sune > > >Maybe Fritz7 is using a selective search for the stronger side. >I am interested to know what is the evaluation of Fritz after 1 second. > >If it is +9 pawns or something similiar then there is no important problem. >If it says +1 instead of mate then there is a problem because in a different >position it may go for another move that gives it +1.2 and this move may lead >to a draw. > >I do not use Fritz as a mate engine because I know from expereince cases when it >believed that the distance to mate is shorter than the real distance to mate. > >Chessmaster in the middlegame or Crafty and yace in the endgame are engines that >I can trust more for finding mates. > > >Uri Fritz 7 analysis looks like this on a P III 800, 128 MB hash. New position 5Q2/1qr4p/2p2pp1/6k1/2B5/4PP2/5PKP/8 w - - 0 1 Analysis by Fritz 7: 1.f4+ Kh5 2.Be2+ +- (1.60) Depth: 7/23 00:00:00 151kN 1.f4+! +- (1.88) Depth: 8/21 00:00:00 207kN 1.f4+! Kh5 2.Be2+ +- (1.94) Depth: 8/27 00:00:01 443kN 1.f4+! +- (2.22) Depth: 9/28 00:00:01 625kN 1.f4+! Kh5 2.Be2+ +- (2.29) Depth: 9/29 00:00:03 1249kN 1.f4+! +- (2.57) Depth: 10/28 00:00:04 1694kN 1.f4+! Kh5 2.Be2+ +- (2.60) Depth: 10/30 00:00:05 2086kN 1.f4+! +- (2.88) Depth: 11/27 00:00:08 3284kN 1.f4+! Kh5 2.Be2+ +- (2.91) Depth: 11/32 00:00:10 4242kN 1.f4+! +- (3.19) Depth: 12/33 00:00:18 7967kN 1.f4+! +- (3.47) Depth: 12/33 00:00:24 10521kN 1.f4+! +- (4.04) Depth: 12/33 00:00:25 10731kN 1.f4+! Kf5 2.Qc5+ Kg4 3.h3+ Kh4 4.Qf8 Qb5 5.Bxb5 +- (#13) Depth: 12/38 00:02:57 79417kN (Larsson, KIL 11.11.2001)
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