Author: Stan Arts
Date: 03:44:03 01/13/04
Go up one level in this thread
Neurosis 1.6 on PIII-550 with 32 mb hash Neurosis in normal mode doesn't find it. Legal moves: 35 Static score: -114 Ply Score Time Nodes Best move and expected line ------------------------------------------------------------ 2 -124 5 171 Rg7 Rxg7 3 -124 5 662 Rg7 Rxg7 Bxg7 4 -138 11 2688 Rg7 Rxg7 Bxg7 g3 4 -136 16 6645 Rh6 a3 Be5 Rb7 5 -134 22 10558 Rh6 a3 Bc3 a2 c6 5 -133 22 11070 Rg7 < + > Rh8 Rxg6 5 -124 27 12477 Rg7 Rxg7 Bxg7 g3 c6 6 -137 99 24413 Rg7 Rxg7 Bxg7 Ra5 Rc1 g3 6 -136 121 38373 Rh6 < + > a3 Bc3 Rg7 c6 6 -134 165 69250 Rh6 a3 Bc3 f4 d6 g3 6 -133 236 118520 Rh4 < + > a3 Bc3 g3 d6 a2 6 -133 242 120399 Rh4 a3 Bc3 g3 d6 a2 dxe7+ Rxe7 Rd1+ Kc7 7 -123 483 317829 Rh4 Rb7 Bd4 Rb4 Rd1 g3 c6 8 -131 1148 828139 Rh4 a3 Bc3 Ra6 c6 a2 Be5 g3 c7+ Kc8 Rd1 8 -130 1549 1106412 Rh8 < + > Rxh8 Bxh8 Ra5 Rc1 Kc8 f4 8 -128 1576 1124896 Rh8 Rxh8 Bxh8 Ra5 Rc1 f4 d6 g3 9 -124 2060 1515722 Rh8 Rxh8 Bxh8 Ra5 Bd4 Kc7 Rd1 f4 Be5+ Kd8 c6 9 -123 2949 2279359 Rh4 < + > a3 Bc3 Ra6 Rb1 Ra8 d6 f4 dxe7+ 9 -122 3768 3015039 Rh4 a3 Bc3 a2 d6 Ra3 dxe7+ Kxe7 Bb2 9 -121 6899 5813009 Be5 < + > Bxh7 Rb1 Rb7 Rxb7 Rg6 9 -112 7338 6226197 Be5 Bxh7 Rb1 Ra8 c6 Ke8 c7 Rc8 Rb8 g3 Rxc8+ Rg7+ 10 -112 8958 7620810 Be5 Bxh7 Rb1 Ra8 c6 Ke8 c7 Rc8 Rb8 g3 Rxc8+ Rg7+ 11 -68 25134 21861354 Be5 Ra5 Rb1 Rxc5 Rb8+ Rc8 Rxc8+ Kxc8 Rxe7 Kd8 d6 12 -67 66333 58453062 Be5 Ra5 Rb1 Rxc5 Rb8+ Rc8 Rxc8+ Kxc8 Rxe7 Kd8 Ra7 13 -17 178524 157725392 Be5 < + > Ra5 c6 Rxd5 c7+ Kc8 Rb1 Rd1+ Rxd1 Bh5 g3 Total nodes:158618833 n/sec:88300 (Q-nodes:16747976 max depth:24) Neighter with speculative 1 , Legal moves: 35 Static score: -142 Ply Score Time Nodes Best move and expected line ------------------------------------------------------------ 2 -172 0 173 Rg7 Rxg7 3 -172 0 668 Rg7 Rxg7 Bxg7 4 -223 6 2717 Rg7 Rxg7 Bxg7 g3 4 -217 6 5665 Rf7 a3 Rg7 Rxg7 4 -217 11 8308 Rh6 f4 c6 f3 4 -211 17 10222 Rh4 a3 Be5 Rb7 5 -205 28 19753 Rh4 a3 Bc3 a2 c6 5 -204 28 20581 Rg7 < + > Rh8 Rxg6 5 -172 33 21571 Rg7 Rxg7 Bxg7 Ra5 Rc1 6 -223 60 38496 Rg7 Rxg7 Bxg7 Ra5 Rc1 g3 6 -222 71 47010 Rh4 < + > a3 Bc3 Rg7 Kf2 6 -199 137 99738 Rh4 a3 Bc3 Ra6 c6 g3 7 -169 439 314295 Rh4 Rb7 Bd4 Rb4 Rd1 g3 c6 8 -199 1456 1113253 Rh4 a3 Bc3 Ra6 Kf2 a2 c6 Rf8 Ke3 8 -198 1884 1463117 Rh8 < + > Rxh8 Bxh8 Ra5 Rc1 Kc7 8 -184 1939 1509960 Rh8 Rxh8 Bxh8 Ra5 Rc1 f4 d6 g3 9 -172 2477 1989255 Rh8 Rxh8 Bxh8 Ra5 Bd4 Kc7 Rd1 f4 Be5+ Kd8 c6 9 -171 3180 2597871 Rh4 < + > a3 Bc3 Ra5 Bxa5+ Kc8 c6 9 -166 4284 3452868 Rh4 a3 Bc3 a2 d6 Ra3 dxe7+ Kxe7 Bb2 9 -165 6360 5268357 Be5 < + > Bxh7 Rb1 Rb7 Rxb7 Rg5 9 -136 7344 6168640 Be5 Bxh7 Rb1 Ra8 c6 Ke8 c7 Rc8 Rb8 g3 Rxc8+ Rg7+ 10 -136 8947 7546995 Be5 Bxh7 Rb1 Ra8 c6 Ke8 c7 Rc8 Rb8 g3 Rxc8+ Rg7+ 11 -74 22948 19731146 Be5 < + > Bxh7 Rb1 Rb7 Rxb7 Kc8 Rxe7 g3 Kf1 Total nodes:25772188 n/sec:87300 (Q-nodes:3807661 max depth:22) But at speculative 2 (passed pawn and other positional values get extremely large) it selects it right away, for positional reasons. Legal moves: 35 Static score: -184 Ply Score Time Nodes Best move and expected line ------------------------------------------------------------ 2 -216 0 234 Rxe7 Rxe7 3 -120 0 436 Rxe7 Rxe7 c6 4 -106 5 3315 Rxe7 Rxe7 Bf6 g3 5 -72 22 13120 Rxe7 Kxe7 d6+ Ke8 c6 6 -138 66 39686 Rxe7 Kxe7 d6+ Ke8 e7 g3 7 -58 192 136518 Rxe7 < + > a3 Rxa7 Rg7 Kf1 7 -54 225 163986 Rxe7 Kxe7 d6+ Ke8 c6 a3 d7+ Ke7 Bxa3+ Rxa3 c7 8 -54 554 441873 Rxe7 Kxe7 d6+ Ke8 c6 a3 d7+ Ke7 Bxa3+ Rxa3 c7 9 -18 1538 1233646 Rxe7 Kxe7 d6+ Kd8 c6 Be8 e7+ Kc8 Rc1 Bxc6 Rxc6+ Kd7 Kf1 10 -18 5229 4522309 Rxe7 Kxe7 d6+ Kd8 c6 Be8 e7+ Kc8 Rc1 Bxc6 Rxc6+ Kd7 Kf2 11 -22 14928 12759678 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bd4 Rh7 e7+ Rxe7 dxe7+ Kc7 Re5 Total nodes:26278825 n/sec:89000 (Q-nodes:2827827 max depth:22) Stan >In this position you can find several passed pawns for both sides (this is >particularly hard for my engine), plus three connected passed pawns after the >sacrifice 1. Rxe7, which is an obvious move to consider for human players. >How much is worth 3 connected passed pawns in the 5th and 6th versus a rook >here? > >[d]3k2r1/r3p2R/4P1b1/2PP1p2/p5p1/8/1B6/4R1K1 w - - 0 1 > >Does your engine find this move? >(Mine doesn't. My passed-pawn goes mad giving extreme values for both sides >during eval, making the search oscillate from one move to another all the time) > >Jaime
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