Author: Chessfun
Date: 15:53:45 09/26/00
Go up one level in this thread
On September 26, 2000 at 16:51:33, Uri Blass wrote: >[D]3r3k/p7/1p6/2p2Q1p/2P1R3/2P5/P2KP3/6q1 w - - 0 1 > >Hiarcs played Kc2 and had to resign some moves later because the queen cannot be >saved[the game continued Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 b5+ cxb5 Qc2+ Ka5 Qxc3+ >and white resigned because of the line Ka6 Rd6+ Kb7 Qg7+ Kb8(forced because Kc8 >is leading to mate) Rd8+]. > >How much time do programs need to avoid this tactical error?(some program like >hiarcs can play Rd4 after a short time but later change their mind to Kc2 so the >right test is to give them at least some minutes) > >Uri Nice job noticing that move Uri !!. This is from game 1 of my post yesterday. Hiarcs 7.32 v Chess Tiger 12.92 Beta. A good test position so it would seem. I expect quite a few programs will have a problem with this. Hiarcs 7.32 48 mb for some reason seems to like Kc2 even to depth 12/30 which is where I stopped it, after a big fail. Though even now it's still thinking after 10 mins and hasn't posted another line yet. Even Fritz 6a likes Kc2 for a while even Qd5?. Seems F6a has as many problems with this as Hiarcs does. Chess Tiger 12.92 Beta selects it for about 3 secs between depths 10-11. Though Tiger can clearly see that Rd4 leaves it still in the game. Following are; Hiarcs 7.32 F6a Chess Tiger 12.92 Beta HIARCS 7.32 Cel 433, 48 Mb hash. 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 Qc1+ 49.Ka4 b5+ 50.cxb5 Qc2+ 51.Ka5 Qxc3+ 52.Ka6 Rd6+ 53.Kb7 Qg7+ 54.Kc8 Qg8+ 55.Kb7 Rb6+ 56.Kc7 Qh7+ 57.Qxh7+ Kxh7 58.Re7+ Kh8 µ (-1.06) Depth: 11/30 00:02:35 8153kN 46.Kc2 Qd1+ µ (-1.33) Depth: 12/30 00:03:10 10219kN 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 Qc1+ 49.Ka4 b5+ 50.cxb5 Qc2+ 51.Ka5 Qxc3+ 52.Ka6 Rd6+ 53.Kb7 Qg7+ 54.Kc8 Qg8+ 55.Kb7 Rb6+ 56.Kc7 Qb8+ 57.Kd7 Qd6+ 58.Ke8 Rb8+ 59.Qc8 Rxc8+ 60.Kf7 -+ (-12.40) Depth: 12/30 00:05:28 20478kN Analysis by Fritz 6: 46.Kc2 Qd1+ 47.Kb2 -+ (-1.75) Depth: 2/7 00:00:00 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 -+ (-1.75) Depth: 3/9 00:00:00 46.Rd4 -+ (-1.72) Depth: 3/11 00:00:00 46.Rd4 cxd4 47.Qf6+ Kh7 -+ (-1.41) Depth: 3/11 00:00:00 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 4/13 00:00:00 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 5/13 00:00:00 1kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 6/16 00:00:00 3kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 7/17 00:00:00 6kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 8/21 00:00:00 11kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 9/25 00:00:00 28kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ -+ (-1.69) Depth: 10/27 00:00:01 237kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ Qg7 49.Qxd8 dxc3+ 50.Kc2 Kh6 -+ (-1.66) Depth: 11/29 00:00:03 876kN 46.Rd4 cxd4 47.Qf6+ Kh7 48.Qe7+ Qg7 49.Qxd8 dxc3+ 50.Kc2 Kh6 -+ (-1.53) Depth: 12/31 00:00:08 2496kN 46.Kc2 -+ (-1.50) Depth: 12/31 00:00:12 3433kN 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 Qc1+ 49.Ka4 b5+ 50.cxb5 Qc2+ ³ (-0.53) Depth: 12/36 00:00:23 6400kN 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 Qc1+ 49.Ka4 b5+ 50.cxb5 Qc2+ ³ (-0.62) Depth: 13/34 00:00:33 9087kN 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 Qc1+ 49.Ka4 b5+ 50.cxb5 Qc2+ µ (-0.91) Depth: 14/36 00:01:00 16487kN 46.Kc2-- µ (-1.22) Depth: 15/37 00:01:15 20885kN 46.Kc2 Qd1+ 47.Kb2 Rd2+ 48.Ka3 Qc1+ 49.Ka4 b5+ 50.cxb5 Qc2+ -+ (-8.75) Depth: 15/42 00:01:29 25534kN 46.Qd5 -+ (-8.72) Depth: 15/42 00:01:49 31645kN 46.Qd5 Rxd5+ 47.cxd5 Qg5+ 48.Re3 Qxd5+ 49.Ke1 Qxa2 50.Rh3 Qd5 -+ (-7.00) Depth: 15/42 00:06:46 112162kN Chess Tiger 12.92 Beta; Cel 433, 48 Mb hash. ; 00:00:00.1 46. Score: -2.16 depth: 8 Rd4 Rxd4+ cxd4 Qxd4+ Ke1 Qc3+ Kf2 Qxc4 Qxh5+ Kg7 Qg5+ Kf7 a3 ; 00:00:00.3 46. Score: -1.92 depth: 8 Rd4 Rxd4+ cxd4 Qxd4+ Ke1 Qc3+ Kf2 Qxc4 Qxh5+ Kg7 Qg5+ Kf7 Qf5+ Ke7 Qh7+ Qf7+ ; 00:00:03.7 46. Score: -2.26 depth: 9 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kh6 c5 bxc5 ; 00:00:05.2 46. Score: -2.12 depth: 10 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kh6 e4 Qg3+ Ke2 Qg2+ Ke3 ; 00:00:21.8 46. Score: -2.04 depth: 10 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 b5+ cxb5 Qc2+ Ka5 Qxc3+ Ka6 Rd6+ Kb7 Qg7+ Kc8 ; 00:00:25.5 46. Score: -2.04 depth: 11 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kh6 e4 Qg3+ Kc2 Qe5 Qa8 ; 00:00:34.8 46. Score: -2.06 depth: 12 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kh6 e4 Qg3+ Kc2 Qe5 Qa8 Qg7 ; 00:01:08.9 46. Score: -1.88 depth: 13 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kh6 Qd5 h4 c5 bxc5 Qxc5 a6 e4 ; 00:02:01.3 46. Score: -1.88 depth: 14 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kg6 a4 Qe5 Qg8+ Kh6 Qd8 Qg3+ e3 Qe5 ; 00:07:14.9 46. Score: -1.80 depth: 15 Rd4 cxd4 Qf6+ Kh7 Qe7+ Qg7 Qxd8 dxc3+ Kd3 Kg6 a4 Qe5 Qa8 Qe7 e4 Qf6 Qxa7 Qf3+ ; Analysis completed Sarah.
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