Author: John Merlino
Date: 09:24:39 01/13/04
Go up one level in this thread
On January 13, 2004 at 05:18:15, Jaime Benito de Valle Ruiz wrote: >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 Chessmaster 9000, SKR personality on a P4-2.4, needs 2:22 to find the rook sacrifice. But the eval is not "winning": Time Depth Score Positions Moves 0:00 1/6 -0.90 17024 1.Rh4 a3 2.Be5 a2 3.Rc1 Ra5 4.Kg2 Ra3 0:00 1/6 -0.79 20311 1.Rh2 g3 2.Rd2 a3 3.Be5 a2 4.Rb2 0:00 1/7 -0.73 46386 1.Rh2 g3 2.Rh4 a3 3.Be5 Be8 4.Rb1 0:00 1/8 -0.63 122318 1.Rh2 f4 2.Be5 Ra5 3.Rc1 Be4 4.Rb2 Ra8 0:02 1/9 -0.71 412471 1.Rh2 f4 2.Be5 Ra5 3.c6 a3 4.Bxf4 Rxd5 5.c7+ Kc8 6.Rc1 0:03 1/9 -0.67 658554 1.Be5 f4 2.Rh4 Ra5 3.c6 Bd3 4.d6 exd6 5.e7+ Kc7 6.Bxf4 0:08 1/10 -0.30 1590726 1.Be5 f4 2.Rh2 a3 3.Bxf4 Ra4 4.Bg3 Be4 5.Rd2 a2 6.Rxa2 Rxa2 7.Rxe4 0:27 1/11 -0.11 4990040 1.Be5 f4 2.Rf7 f3 3.c6 Kc8 4.Rf4 Ra8 5.Rxg4 a3 6.Rc1 a2 0:48 2/12 0.12 8698365 1.Be5 f4 2.Rf7 f3 3.c6 Kc8 4.Rf4 Ra8 5.Rxg4 Bh7 6.Rxg8+ Bxg8 7.Re3 a3 8.Rxf3 1:59 3/13 0.28 21808533 1.Be5 f4 2.Rf7 f3 3.c6 Ra5 4.d6 exd6 5.Rd7+ Kc8 6.Bxd6 Ra8 7.e7 a3 8.Rc7+ Kb8 2:22 3/13 0.45 26425117 1.Rxe7 Kxe7 2.d6+ Kd8 3.c6 Be8 4.Bf6+ Kc8 5.Rc1 Ra8 6.d7+ Kc7 7.Be5+ Kb6 8.e7 Bxd7 9.cxd7 Kb5 4:07 4/14 0.69 46732938 1.Rxe7 Kxe7 2.d6+ Kd8 3.c6 Be8 4.Bf6+ Kc8 5.Rc1 Rc7 6.d7+ Bxd7 7.cxd7+ Kb7 8.Re1 a3 9.d8=Q Rxd8 10.Bxd8 jm
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