Author: Christopher Conkie
Date: 19:28:12 01/15/06
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On January 15, 2006 at 20:55:17, Keith Ian Price wrote: >[D]b1r1qn1k/1rb3p1/2p1p2p/2N1P3/1P1P4/R2B1N2/3Q1PPP/2R3K1 b - - 0 43 > >In this position both Rybka Beta 1.0 and Beta 10d think they have a draw, when >they are losing. If you make the move that they think gets them a draw, they >both show that they are losing. Is this a null move problem, or why can't they >see they are losing until the move is made? > >kp Are you sure you have given the correct position? Christopher Rybka 1.0 Beta 32-bit: 3 00:00.011 228 233.472 +1.97 Rb6 4 00:00.030 556 51.758 +2.03 Rb6 5 00:00.060 1.722 33.910 +2.51 Rb6 Rca1 6 00:00.141 4.375 40.000 +2.57 Rb6 Rca1 Kg8 7 00:00.251 10.361 43.841 +2.59 Rb6 Rca1 Rbb8 Na6 8 00:00.662 34.390 54.852 +2.55 Rb6 Ra7 Nd7 Ba6 Rcb8 9 00:00.903 53.220 61.718 +2.61 Rb6 Ra7 Nd7 Ba6 Rcb8 Ra1 10 00:01.934 137.416 73.518 +2.89 Rb6 Rca1 Rbb8 Na6 Rb7 Nxc7 Rbxc7 Ra7 10 00:04.437 293.753 68.085 +2.58 Rbb8 Na6 Rb6 Nxc7 Rxc7 Ra5 Kg8 h3 11 00:08.574 524.467 62.710 +2.52 Rbb8 Na6 Rb6 Nxc7 Rxc7 Ra5 Kg8 h3 Bb7 12 00:17.386 1.057.238 66.077 +2.59 Rbb8 b5 Bd8 Ne4 cxb5 Rxc8 Rxc8 Nd6 Qe7 Bxb5 13 00:37.055 2.267.229 62.978 +2.81 Rbb8 Na6 Rb6 Nxc7 Rxc7 b5 Bb7 d5 exd5 Qe3 14 00:56.443 3.528.392 64.152 +2.66 Rbb8 Na6 Rb7 b5 Bb6 Rxc6 Rxc6 bxc6 Qxc6 Nb4 15 01:14.068 4.806.607 65.843 +2.72 Rbb8 Na6 Rb7 b5 Bb6 Rxc6 Rxc6 bxc6 Qxc6 Nb4 16 03:32.096 13.332.175 64.406 +2.87 Rbb8 Qa2 Rd8 Na6 Rbc8 Nxc7 Rxc7 b5 c5 b6 Rybka 1.01 Beta 10d 32-bit: 3 00:00.361 304 0 +1.97 Rb6 4 00:00.361 1.352 0 +2.03 Rb6 5 00:00.361 3.240 0 +2.51 Rb6 Rca1 6 00:00.412 9.880 0 +2.57 Rb6 Rca1 Kg8 7 00:00.552 10.683 0 +2.59 Rb6 Rca1 Rbb8 Na6 8 00:00.953 35.012 0 +2.55 Rb6 Ra7 Nd7 Ba6 Nxc5 9 00:01.303 57.196 0 +2.61 Rb6 Ra7 Nd7 Ba6 Nxc5 Bxc8 10 00:02.355 128.790 0 +2.87 Rb6 Rca1 Rbb8 Na6 Bb7 b5 c5 10 00:04.938 293.069 0 +2.58 Rbb8 Na6 Rb6 Nxc7 Rxc7 Rca1 Bb7 Ba6 11 00:09.374 557.426 0 +2.52 Rbb8 Na6 Rb6 Nxc7 Rxc7 Ra5 Kg8 h3 Bb7 12 00:21.292 1.250.215 0 +2.78 Rbb8 Ne4 Qe7 Ra7 Kg8 Nc5 Nd7 Nxe6 Bb6 13 00:26.739 1.605.807 0 +2.72 Rbb8 Ne4 Qe7 Ra7 Kg8 Nc5 Qe8 Bc4 Qf7 Rxc7 14 00:37.274 2.346.126 0 +2.80 Rbb8 Ne4 Qe7 Ra7 Kg8 Nc5 Qe8 Bc4 Kh7 Rxc7 Rxc7 Na6 15 01:48.828 6.526.991 0 +2.75 Rbb8 Na6 Rb7 b5 Bb6 Rxc6 Rxc6 bxc6 Qxc6 Nc5 Bxc5 Rxa8 Rc7 Ra2 16 02:37.628 9.313.279 0 +2.75 Rbb8 Na6 Rb7 b5 Bb6 Rxc6 Rxc6 bxc6 Qxc6 Nc5 Bxc5 Rxa8 Be7 Qf4 17 06:28.349 23.124.849 0 +2.87 Rbb8 Qa2 Bd8 Bc4 Be7 Bxe6 Nxe6 Qxe6 Rxb4 Ra7 Bxc5 Qxe8+ Rxe8 dxc5
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