Author: Uri Blass
Date: 22:40:23 10/09/02
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On October 10, 2002 at 01:28:17, Uri Blass wrote: >On October 10, 2002 at 01:06:26, K. Burcham wrote: > >> >> >>Game three of Deep Fritz7 vs GM Kramnik, DF7 thinks it has positional advantage >>of +.5 after 28...Rxf6 >>You can see that DF7 is down a pawn with only -.56 eval. >>this is 47 minutes on 2x1533mhz 432 hash. > >I think that Fritz was down a pawn a lot before 28...Rxf6 >Analysis proved that after 22.Nd5 white has no way to prevent losing a pawn. > >I believe that Fritz's positional evaluation was more than a pawn. >Having a Deep search on position when Fritz was a pawn down does not show the >real evaluation of Fritz of the relevant position. > >Uri Some analysis of Deep Fritz6 to show positional evaluation of more than 1 pawn(I believe that Fritz7 behaves in a similiar way). Fritz - Kramnik [D]2kr3r/p4pbp/1pp1b3/2pNPp2/2P2P2/PP2K3/6PP/2R2B1R w - - 0 1 Analysis by Deep Fritz: 23.Nxb6+-- µ (-0.75) Depth: 1/3 00:00:00 23.Nxb6+-- axb6 -+ (-1.50) Depth: 1/3 00:00:00 23.Nf6! = (-0.06) Depth: 1/9 00:00:00 23.Nf6! Bxf6 ² (0.63) Depth: 1/9 00:00:00 23.Ne7+! ² (0.66) Depth: 1/9 00:00:00 23.Ne7+-- ² (0.34) Depth: 2/7 00:00:00 23.Ne7+-- Kd7 24.Nxc6 Kxc6 -+ (-1.72) Depth: 2/7 00:00:00 23.Nf6! ³ (-0.69) Depth: 2/7 00:00:00 23.Nf6! Bxf6 24.exf6 ² (0.63) Depth: 2/7 00:00:00 23.Nf6-- = (0.13) Depth: 3/9 00:00:00 23.Nf6-- = (0.13) Depth: 3/9 00:00:00 23.Nf6 Bxf6 24.exf6 Rhe8 25.Re1 ² (0.41) Depth: 4/10 00:00:00 1kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 a6 = (0.16) Depth: 5/11 00:00:00 2kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 a6 26.Re1 ² (0.44) Depth: 6/15 00:00:00 7kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 h5 26.Re1 Bd5+ 27.Kf2 = (0.25) Depth: 7/16 00:00:00 23kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 Rd6 26.Re1 Bd5+ 27.Kf2 Rxe1 28.Kxe1 ² (0.34) Depth: 8/19 00:00:00 54kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 Rd2 26.Be2 Rxe2 27.Kxe2 Bxc4+ 28.Kd2 Bxb3 ² (0.34) Depth: 9/20 00:00:00 125kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 Rd2 26.g3 Ra2 27.a4 Rb2 28.Rc3 ² (0.41) Depth: 10/26 00:00:00 384kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 Rd2 26.Re1 Ra2 27.a4 Rb2 28.Re3 Rd2 ² (0.38) Depth: 11/28 00:00:01 780kN 23.Nf6 Bxf6 24.exf6 a5 25.Be2 Rhg8 26.Kf3 Rg6 27.Rcd1 Rxf6 28.Rxd8+ Kxd8 ² (0.34) Depth: 12/31 00:00:03 2244kN You can see that White is losing a pawn in the main line It means positional evaluation of Deep Fritz 1.34 23.Nf6 Bxf6 24.exf6 Rd6 25.Re1 Bd7 26.Bd3 Rxf6 27.Kd2 Kd8 28.Re2 Rd6 ² (0.28) Depth: 13/32 00:00:07 5060kN 23.Nf6 Bxf6 24.exf6 Rd6 25.Re1 Bd7 26.Kf3 Rxf6 27.Re5 Re6 28.Bd3 f6 ² (0.28) Depth: 14/32 00:00:12 8684kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 Rg8 26.Be2 Rg6 27.Rcd1 Rxf6 28.Rxd8+ Kxd8 = (0.22) Depth: 15/35 00:00:27 18244kN 23.Nf6 Bxf6 24.exf6 Rhe8 25.Kf3 Rd2 26.Rc3 Rd1 27.Re3 Red8 28.Rg1 b5 = (0.25) Depth: 16/36 00:01:07 46266kN (blass, tel-aviv 10.10.2002) Uri
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