Author: Uri Blass
Date: 07:00:08 09/09/01
Go up one level in this thread
On September 09, 2001 at 08:54:41, Gian-Carlo Pascutto wrote: >On September 09, 2001 at 08:51:12, Uri Blass wrote: > >>On September 09, 2001 at 06:36:20, Slater Wold wrote: >> >>>My arguement: That at 200M nodes per second (not to mention some pretty >>>revolutionary software, at that time), I don't care _WHAT_ positon you throw at >>>Deeper Blue, it will _ALWAYS_ solve it faster than Deep Fritz on todays HW. >> >>There are positions that Deep Fritz can solve faster than Deeper blue >>the position when Deeper blue missed a win by Kh1 in game 2 when it played Kf1 >> >>I already posted the analysis of Deep Fritz and here it is again in the end of >>my post > >What is the score difference between Kf1 and Kh1 at those depths? 1.91-1.56=0.35 A significant positional difference. 1.91 is the score of Kh1 at depth 24 when 1.56 is the score after the next 2 plies of the game at depth 22. Deep Fritz does not like the game line. It cannot see a draw score but it prefers Qd7+ and not Ra6 Here is the analysis with Qd7+ and the 1.56 score. [D]Rr6/5kp1/1qQb1p1p/1p1PpP2/1Pp1B3/2P4P/6P1/5K2 w - - 0 1 Analysis by Deep Fritz: 45.Qd7+! ± (1.31) Depth: 3/11 00:00:00 1kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 ± (1.34) Depth: 5/12 00:00:00 4kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh7 48.Qxb6 Rxb6 49.g3 +- (1.44) Depth: 6/16 00:00:00 9kN 45.Qd7+-- ± (1.13) Depth: 7/15 00:00:00 22kN 45.Qd7+-- ± (1.13) Depth: 7/15 00:00:00 25kN 45.Qxb6! ± (1.16) Depth: 7/15 00:00:00 27kN 45.Qxb6! Rxb6 46.Ra7+ Kf8 47.g3 h5 48.Ke2 h4 49.gxh4 ± (1.25) Depth: 7/18 00:00:00 38kN 45.Ra6! ± (1.28) Depth: 7/18 00:00:00 48kN 45.Ra6! Qxc6 46.dxc6 Ke8 47.Ra7 Rc8 ± (1.38) Depth: 7/18 00:00:00 53kN 45.Ra6 Qxc6 46.dxc6 Ke8 47.Ra7 Rc8 ± (1.38) Depth: 8/18 00:00:00 80kN 45.Ra6 Qxc6 46.dxc6 Ke8 47.Ra7 Rd8 +- (1.44) Depth: 9/21 00:00:00 157kN 45.Ra6 Qxc6 46.dxc6 Bc7 47.Ra7 Rc8 48.Rb7 Ke7 49.Ke2 Kd6 50.Rxb5 +- (1.44) Depth: 10/24 00:00:00 303kN 45.Ra6 Qxc6 46.dxc6 Kg8 47.Ra7 Rc8 48.Rb7 Kf8 49.Rxb5 +- (1.53) Depth: 11/28 00:00:01 839kN 45.Ra6 Qxc6 46.dxc6 Kf8 47.Ra7 Rd8 48.Rb7 Ra8 49.Rd7 Be7 50.c7 Ra1+ +- (1.59) Depth: 12/30 00:00:02 1617kN 45.Ra6 Qxc6 46.dxc6 Kf8 47.Ra7 Rc8 48.Rb7 Bc7 49.Rxb5 Ke7 +- (1.66) Depth: 13/32 00:00:04 3128kN 45.Ra6 Qxc6 46.dxc6 Rc8 47.Ra5 Ke7 48.Rxb5 h5 49.Bd5 +- (1.78) Depth: 14/34 00:00:11 7087kN 45.Ra6-- +- (1.47) Depth: 15/40 00:00:59 37421kN 45.Ra6-- Qe3 46.Qd7+ Kg8 47.Qxd6 Rf8 48.Qe6+ Kh7 49.Qe7 Rg8 50.Bf3 Qc1+ ± (1.22) Depth: 15/41 00:01:18 49651kN 45.Ra6 Qe3 46.Qd7+ Kg8 47.Qxd6 Rf8 48.Qe6+ Kh7 49.Bf3 Qc1+ 50.Kf2 Qd2+ ± (1.22) Depth: 16/45 00:02:48 106539kN 45.Ra6 Qe3 46.Qxd6 Re8 47.h4 h5 48.Bf3 Qc1+ 49.Kf2 Qd2+ 50.Be2 Qf4+ ± (1.00) Depth: 17/43 00:06:12 235347kN 45.Qd7+! ± (1.03) Depth: 17/43 00:07:40 293411kN 45.Qd7+! Kg8 46.Ra7 Bf8 47.Qe6+ Kh8 48.Qxb6 Rxb6 49.Bf3 Bd6 50.Ra8+ Kh7 ± (1.31) Depth: 17/44 00:08:23 320283kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qe6+ Kh8 48.Qxb6 Rxb6 49.Bf3 Bd6 50.Ra8+ Rb8 ± (1.28) Depth: 18/42 00:09:56 379789kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Ke2 Kh7 48.Qf7 +- (1.47) Depth: 19/44 00:17:16 662024kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qf7+ Kh8 48.Ke2 Qd6 49.Qe6 Qb6 50.Qxb6 Rxb6 +- (1.50) Depth: 20/47 00:33:48 1297637kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qf7+ Kh8 48.Ke2 Qd6 49.Qe6 Qb6 50.Qxb6 Rxb6 +- (1.53) Depth: 21/48 01:05:55 2543899kN 45.Qd7+ Kg8 46.Ra7 Bf8 47.Qf7+ Kh8 48.Ke2 Qd6 49.Qe6 Qb6 50.Qxb6 Rxb6 +- (1.56) Depth: 22/52 02:25:04 5625115kN > >Was the reason Kf1 is bad the 60 ply drawing line? Can Fritz actually >see it? It is impossible to see 0.00 evaluation even after Qe3 because there is also a quiet line when there is no forced draw when computers evaluate the position as a small positional advantage for white but I remember that after Qe3 Deep Fritz can see the quiet line as it's main line after enough time. Uri
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