Author: Mogens Larsen
Date: 17:05:24 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 The Gandalf result (Athlon 800MHz, WinBoard, 56Mb hash): 2 -177 10 196 Kc2 Qd1+ Kb2 Rd2+ Ka3 3 -148 10 785 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Kb3 4 -193 10 6068 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 Rxa2+ Kb5 4 -190 10 9279 Rd4 !! 4 -155 20 14085 Rd4 Rxd4+ cxd4 Qxd4+ Ke1 Qg1+ Kd2 Qg4 Qe5+ Kh7 5 -145 30 27407 Rd4 Rxd4+ cxd4 Qxd4+ Ke1 Qh4+ Kf1 Qh1+ Kf2 Qh2+ 6 -140 50 69155 Rd4 cxd4 Qf6+ Kh7 Qxd8 dxc3+ Kc2 Qg7 7 -132 80 133167 Rd4 cxd4 Qf6+ Kh7 Qxd8 dxc3+ Kc2 Qe3 Qd3+ Qxd3+ 8 -121 170 326855 Rd4 cxd4 Qf6+ Kh7 Qxd8 dxc3+ Kc2 Qg7 Qd3+ Qg6 8 -118 640 1213167 Kc2 !! 8 -102 970 1846809 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 b5+ cxb5 Rxa2+ 9 -100 1660 3173701 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 b5+ cxb5 Rxa2+ 10 -92 3920 7386677 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 b5+ cxb5 Qc2+ 11 -992 7050 14993872 Kc2 Qd1+ Kb2 Rd2+ Ka3 Qc1+ Ka4 b5+ cxb5 Qc2+ 11 -988 7180 15331919 Rd4 !! 11 -627 25500 53753407 Rd4 !! 11 -588 25690 54251266 Rd4 !! 11 -512 25880 54705304 Rd4 !! 11 -358 26120 55248585 Rd4 !! 11 -118 30500 62951694 Rd4 cxd4 Qf6+ Kh7 Qxd8 dxc3+ Kxc3 Qc1+ Kb3 Qe3+ 12 -126 60050 114611719 Rd4 Rxd4+ cxd4 Qxd4+ Ke1 h4 Qf7 a5 Qe6 Kg7 13 -116 77470 145839242 Rd4 Rxd4+ cxd4 Qxd4+ Ke1 h4 Qf7 a5 Qe6 Kg7 So it takes 72 seconds to select Rd4 and stick to it. Best wishes... Mogens
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