Author: Tord Romstad
Date: 02:44:31 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)
Found in 5 plies and 0.14 seconds on a PIV 2.4 GHz, but even after 13 plies
there
is no clear winning score:
1 -0.88 0.00 256 Rh6
2 -1.05 0.01 415 Rg7 Rxg7 Bxg7
3 -1.05 0.03 1754 Rg7 Rxg7 Bxg7
4 -1.75 0.07 7242 Rh2 f4 c6 Bd3
5 -1.20 0.14 19230 Rxe7 Rxe7 Bf6 Rf8 Bxe7+ Kxe7
6 >= -1.11 0.16 20668 Rxe7 Rxe7 Bf6 Rf8 Bxe7+ Kxe7 c6
6 >= -1.09 0.17 20798 Rxe7 Rxe7 Bf6 Rf8 Bxe7+ Kxe7 c6
6 >= -1.03 0.18 21159 Rxe7 Rxe7 Bf6 Rf8 Bxe7+ Kxe7 c6
6 >= -0.89 0.19 21655 Rxe7 Rxe7 Bf6 Rf8 Bxe7+ Kxe7 c6
6 <= -0.66 0.30 40054 Rxe7 Rxe7 Bf6 Ke8 d6 Rxe6 Rxe6+ Kd7
6 <= -0.67 0.31 40407 Rxe7 Rxe7 Bf6 Ke8 d6 Rxe6 Rxe6+ Kd7
6 <= -0.70 0.31 41799 Rxe7 Rxe7 Bf6 Ke8 d6 Rxe6 Rxe6+ Kd7
6 >= -0.77 0.31 42049 Rxe7 Rxe7 Bf6 Ke8 d6 Rxe6 Rxe6+ Kd7
6 >= -0.72 0.32 42547 Rxe7 Rxe7 d6 Rc7 Bf6+ Kc8 dxc7 Kxc7 Kg2
6 >= -0.70 0.33 42640 Rxe7 Rxe7 d6 Rc7 Bf6+ Kc8 dxc7 Kxc7 Kg2
6 -0.70 0.34 42640 Rxe7 Rxe7 d6 Rc7 Bf6+ Kc8 dxc7 Kxc7 Kg2
7 >= -0.70 0.44 59520 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 c6
7 >= -0.69 0.45 59681 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 c6
7 >= -0.62 0.46 59886 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 c6
7 >= -0.48 0.48 61857 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+
7 >= -0.23 0.50 64391 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+
7 >= 0.16 0.56 75812 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+
7 <= 0.69 0.59 82020 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Ke8
7 <= 0.67 0.60 82265 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Ke8
7 >= 0.66 0.65 91815 Rxe7 Rxe7 Bf6 Ke8 Bxe7
7 <= 0.66 0.66 92524 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Kd8
7 0.66 0.67 92524 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Kd8
8 >= 0.66 0.70 97451 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Kd8 c6
8 >= 0.67 0.79 116139 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Kd8 c6
8 >= 0.73 0.82 123303 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Kd8 c6
8 >= 0.88 0.90 141595 Rxe7 Rxe7 Bf6 Ke8 Bxe7 Kxe7 d6+ Kd8 c6
8 <= 1.11 1.10 189383 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
8 <= 1.09 1.11 190779 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
8 <= 1.06 1.12 192144 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
8 <= 0.98 1.15 195985 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
8 >= 0.89 1.16 196789 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
8 <= 0.89 1.17 199074 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
8 0.89 1.17 199074 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
9 <= 0.88 2.00 400297 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
9 >= 0.88 2.05 412545 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
9 0.88 2.06 412545 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Bd4 Rc7
10 >= 0.88 4.06 938185 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Rc1 a3
d7+ Bxd7 cxd7+ Kb8 Be5+ Kb7 e7
10 >= 0.89 4.13 956076 Rxe7 Kxe7 d6+ Kd8 c6 Be8 Bf6+ Kc8 Rc1 a3
d7+ Bxd7 cxd7+ Kb8 Be5+ Kb7 e7
10 <= 0.94 7.32 1767025 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
10 <= 0.92 7.60 1841365 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
10 <= 0.89 7.73 1880172 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
10 0.89 7.74 1880172 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
11 >= 0.89 8.25 2016994 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
11 <= 0.89 16.00 4095967 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
11 0.89 16.01 4095967 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
12 >= 0.89 28.25 7154491 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bg5 f3
Bxe7 Rxe7 Kf2 a3 Re3
12 <= 0.89 51.53 12773413 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bg5 f3
Bxe7 Rxe7 Kf2
12 0.89 51.53 12773413 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bg5 f3
Bxe7 Rxe7 Kf2
13 <= 0.88 1:28 22107647 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bg5 f3
Bxe7 Rxe7 Kf2 Be8
13 >= 0.88 1:39 24728234 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
dxe7 a3 Ra1 Be8 Rxa3
13 0.88 1:39 24728234 Rxe7 Rxe7 Bf6 Re8 d6 f4 c6 Kc8 Bxe7 Rxe7
dxe7 a3 Ra1 Be8 Rxa3
Tord
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