Author: Uri Blass
Date: 16:45:49 07/09/03
Go up one level in this thread
On July 09, 2003 at 19:08:45, Dieter Buerssner wrote: >On July 09, 2003 at 02:28:35, Tony Werten wrote: > >>There does seem to be something strange though. The line Yace is giving with a >>score of 1.4 is a perpetual check, with even a repetition in the main line. > >Yes. The line shown by Yace was fetched from HTs (and the fact was indicated be >the "H"s attached to the moves). I think, I have no bug about repetition >detection. I guess with more RAM initially a nicer line would have been shown. >There is also the promotion to R in that line. Promotion to Q was probably seen >as draw already. Probably HTs helped much, but at the time promotion to R was >searched, the critical positions were overwritten. Still not bad, I think (until >yet, only Ruffian analysis was shown, often a secure indication that the >commercial engines will not do too well). > >Regards, >Dieter Shredder7.04 can solve it with 64 mbytes hash at depth 18(better than Ruffian) I also expect next movei to solve it fast adter I add the relevant knowledge (it does not need to see the draw but only suspect it and reduce the score for Kxa2) New game 8/3R1P2/1ppP1p2/3r4/8/K7/p4k2/8 w - - 0 1 Analysis by Shredder 7.04: 1.f8Q a1Q+ 2.Kb3 -+ (-2.00) Depth: 1/3 00:00:00 1.Kxa2 +- (1.67) Depth: 1/3 00:00:00 1.Kxa2 +- (1.67) Depth: 1/3 00:00:00 1.Kxa2 Rh5 +- (1.94) Depth: 2/4 00:00:00 1.Kxa2 Rd2+ 2.Kb3 +- (2.03) Depth: 2/4 00:00:00 1.Kxa2 Ra5+ 2.Kb3 Ra8 ² (0.44) Depth: 3/6 00:00:00 1.Kxa2 Ra5+ 2.Kb3 Ra8 ² (0.44) Depth: 3/6 00:00:00 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 ² (0.70) Depth: 4/11 00:00:00 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 ² (0.70) Depth: 4/11 00:00:00 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 f5 ² (0.70) Depth: 5/11 00:00:00 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 Rg8 4.fxg8Q ± (0.95) Depth: 6/15 00:00:00 2kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 Rg8 4.fxg8Q +- (1.45) Depth: 6/15 00:00:00 3kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Rc7 c5 4.Kc4 +- (1.45) Depth: 6/15 00:00:00 3kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Rc7 c5 4.d7 Rd8 ± (1.03) Depth: 7/15 00:00:00 4kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Ra7 Rh8 4.Kc4 ± (0.98) Depth: 7/15 00:00:00 10kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 Rf8 4.Kc3 Rg8 5.fxg8Q ± (1.23) Depth: 8/19 00:00:00 24kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 Rf8 4.Kc3 Rg8 5.fxg8Q +- (1.73) Depth: 8/19 00:00:00 30kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Rb7 Rf8 4.Ka3 +- (1.73) Depth: 8/19 00:00:01 40kN 1.Kxa2 Ra5+ 2.Kb1 Ra8 3.Rc7 c5 4.Rb7 +- (1.48) Depth: 9/19 00:00:01 50kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 Rf8 4.d7 Rg8 5.fxg8Q +- (1.48) Depth: 9/19 00:00:01 76kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 b5 4.Re8 Ra7 5.f8Q Ra3+ 6.Kxa3 +- (1.73) Depth: 10/19 00:00:01 103kN 1.Kxa2 Ra5+ 2.Kb3 Ra8 3.Re7 b5 4.Re8 Ra7 5.f8Q Ra3+ 6.Kxa3 +- (2.23) Depth: 10/19 00:00:01 140kN 1.Kxa2 Ra5+ 2.Kb2 f5 3.f8Q Rb5+ 4.Kc2 Rc5+ 5.Kb3 Rb5+ 6.Kc4 Rb4+ 7.Kxb4 c5+ 8.Kc3 c4 +- (6.77) Depth: 10/23 00:00:01 293kN 1.Kxa2 Ra5+ 2.Kb2 f5 3.f8Q Rb5+ 4.Kc2 Rc5+ 5.Kb3 Rb5+ 6.Kc4 Rc5+ 7.Kb4 Rb5+ 8.Kc3 Rc5+ 9.Kb4 Rb5+ 10.Kc3 Rc5+ 11.Kb4 Rb5+ +- (6.77) Depth: 11/23 00:00:02 408kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q f4 5.Qe7 Ra5 6.d7 Rb5+ 7.Kc4 c5 +- (6.96) Depth: 12/25 00:00:03 697kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q f4 5.Qxf4+ Ke1 6.Qe3+ Kd1 7.Qxb6 Re7 8.dxe7 +- (7.18) Depth: 13/26 00:00:05 1055kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q f4 5.Qxf4+ Ke2 6.Qe4+ Kd2 7.Qb4+ Kd3 8.Qxb6 Re7 9.dxe7 +- (7.18) Depth: 14/27 00:00:07 1543kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q f4 5.Qxf4+ Ke2 6.Qe4+ Kd2 7.Qb4+ Kd1 8.Qxb6 Re7 9.dxe7 +- (7.43) Depth: 15/29 00:00:12 2766kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q f4 5.Qxf4+ Ke2 6.Qe4+ Kd2 7.Qb4+ Kd1 8.Qxb6 Re7 9.dxe7 +- (7.43) Depth: 15/29 00:00:13 2838kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q f4 5.Qxf4+ Ke2 6.Qe4+ Kf2 7.Qxc6 Kf1 8.Qxb6 Ra3+ 9.Kxa3 +- (7.68) Depth: 16/31 00:00:23 5463kN 1.Kxa2 Ra5+ 2.Kb3 f5 3.Ra7 Rxa7 4.f8Q c5 5.Qe7 Rxe7 6.dxe7 f4 7.e8Q f3 8.Kc4 +- (7.78) Depth: 16/31 00:00:30 7243kN 1.Kxa2 Ra5+ 2.Kb1 f5 3.Ra7 Rxa7 4.f8Q c5 5.d7 Rxd7 6.Qxf5+ Ke2 7.Qe6+ Kd3 8.Qf7 Rxf7 +- (7.63) Depth: 17/34 00:00:51 11804kN 1.Kxa2 Ra5+ 2.Kb1 f5 3.Ra7 Rxa7 4.f8Q c5 5.d7 Rxd7 6.Qxf5+ Ke2 7.Qe6+ Kd3 8.Qxd7+ Ke3 9.Qh3+ Kf4 10.Qh4+ Ke5 +- (7.88) Depth: 18/35 00:01:14 17717kN 1.Kxa2 f5 2.Ra7 Re5 3.f8R f4 4.Rxf4+ Kg3 5.Rf3+ Kxf3 6.Ra3+ Ke2 7.Re3+ Rxe3 8.Kb1 b5 9.d7 c5 10.d8Q Ke1 11.Qd1+ +- (7.88) Depth: 18/39 00:02:38 37228kN 1.Kb2 Ra5 2.Ka1 Ra8 3.Re7 Rd8 4.Kxa2 +- (7.89) Depth: 18/39 00:04:12 57048kN 1.Kb2 a1Q+ 2.Kxa1 Ra5+ 3.Kb1 f5 4.Ra7 Rxa7 5.f8Q f4 6.Qxf4+ Ke2 7.Qc4+ Kf3 8.Qxc6+ Ke2 9.Qxb6 Rd7 10.Kc2 Kf3 +- (8.18) Depth: 18/39 00:06:06 83559kN (Blass, Tel-Aviv 10.07.2003) Uri
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