Author: Tord Romstad
Date: 09:22:20 11/03/03
[D]2r2bk1/4qp2/3n2p1/2R1p1Np/2p1N3/r6P/1Q3PP1/3R2K1 w - - bm Rxc8; id "ECM.973";
My engine wants to play Rxd6 rather than Rxc8 here, even after several
minutes of thinking (analysis below). Only at ply 13 does the best move
change to Rxc8, but even then the score does not rise much. As far as I can
see, Rxd6 should win easily. Am I (and my engine) missing something, or is
Rxd6 a second solution?
1 1.25 0.00 214 Rxd6 Rxc5 Qxa3
2 0.84 0.01 1256 Rxd6 Qxd6 Nxd6 Rxc5
3 0.84 0.02 2220 Rxd6 Qxd6 Nxd6 Rxc5
4 1.09 0.06 6946 Rxd6 Qxd6 Nxd6 Rxc5 Qxa3 Bxd6
5 0.84 0.26 33210 Rxd6 Rxc5 Nf6+ Kg7 Qxa3 Qxd6 Ne8+ Kg8
6 >= 0.84 0.43 51999 Qxa3 Nxe4 Nxe4 Rxc5 Rd7
6 >= 0.86 0.44 52606 Qxa3 Nxe4 Nxe4 Rxc5 Rd7
6 >= 0.94 0.44 53431 Qxa3 Nxe4 Nxe4 Rxc5 Rd7
6 >= 1.08 0.44 54490 Qxa3 Nxe4 Nxe4 Rxc5 Rd7
6 <= 1.31 0.59 77704 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 <= 1.30 0.59 79014 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 <= 1.27 0.59 80763 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 <= 1.19 0.61 83540 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 >= 1.09 0.61 83738 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 >= 1.11 0.61 83948 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 <= 1.16 0.61 85437 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 <= 1.14 0.61 86237 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 <= 1.11 0.62 87236 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
6 1.11 0.62 87236 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
7 >= 1.11 0.71 100871 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+
7 <= 1.11 1.09 168762 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+ Kg7
Nxd7
7 1.11 1.09 168762 Qxa3 Nxe4 Nxe4 Rxc5 Rd7 Qxd7 Nf6+ Kg7
Nxd7
8 >= 1.11 1.83 310438 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6
8 >= 1.12 1.86 316218 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6
8 >= 1.19 1.90 328091 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6
8 >= 1.33 1.97 344962 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6
8 >= 1.58 2.10 375800 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6
8 <= 1.95 2.45 449820 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 <= 1.94 2.45 453058 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 <= 1.91 2.47 457497 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 <= 1.83 2.49 466440 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 <= 1.67 2.52 477561 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 >= 1.59 2.53 479714 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 >= 1.61 2.54 482506 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ngxf7
8 <= 1.66 2.55 486303 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Ra5 Nf6+ Kh8 Qc3
8 <= 1.64 2.56 489962 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Ra5 Nf6+ Kh8 Qc3
8 <= 1.61 2.57 494272 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Ra5 Nf6+ Kh8 Qc3
8 1.61 2.57 494272 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Ra5 Nf6+ Kh8 Qc3
9 <= 1.59 3.88 796377 Rxd6 Rxc5 Qxa3 Rc7 Qa6 c3
9 <= 1.58 3.93 814308 Rxd6 Rxc5 Qxa3 Rc7 Qa6 c3
9 >= 1.56 4.31 907464 Rxd6 Rxc5 Qxa3 Rc7 Qa6 c3
9 >= 1.58 4.33 913105 Rxd6 Rxc5 Qxa3 Rc7 Qa6 c3
9 1.58 4.33 913105 Rxd6 Rxc5 Qxa3 Rc7 Qa6 c3
10 <= 1.56 7.71 1743388 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2
10 <= 1.55 7.95 1841969 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2
10 <= 1.52 8.21 1950516 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2
10 <= 1.44 9.23 2260120 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2
10 >= 1.30 10.97 2673547 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 >= 1.31 11.06 2702280 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 >= 1.38 11.17 2741543 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 <= 1.42 11.65 2890794 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 <= 1.41 11.88 2979645 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 >= 1.39 11.93 2999799 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 >= 1.41 11.98 3022637 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
10 1.41 11.98 3022637 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
11 >= 1.41 15.39 3859655 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
11 >= 1.42 16.11 4042385 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
11 >= 1.48 19.26 4798747 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 c3 Ndxf7
c2 Qc6
11 <= 1.61 27.46 6817340 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Qxd6 Nxd6 Bxd6 Qa8+
Kg7 Qd5
11 <= 1.59 28.05 7010339 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Qxd6 Nxd6 Bxd6 Qa8+
Kg7 Qd5
11 <= 1.56 28.71 7240119 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Qxd6 Nxd6 Bxd6 Qa8+
Kg7 Qd5
11 >= 1.50 28.89 7297967 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Qxd6 Nxd6 Bxd6 Qa8+
Kg7 Qd5
11 >= 1.52 29.18 7378652 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Qxd6 Nxd6 Bxd6 Qa8+
Kg7 Qd5
11 <= 1.55 30.11 7661216 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Kg7 Ra6 Kh8 Rf6
Qe8 Qa5
11 <= 1.53 30.61 7841242 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Kg7 Ra6 Kh8 Rf6
Qe8 Qa5
11 >= 1.53 30.90 7921430 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Kg7 Ra6 Kh8 Rf6
Qe8 Qa5
11 1.53 30.90 7921430 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Kg7 Ra6 Kh8 Rf6
Qe8 Qa5
12 <= 1.52 1:03 16249108 Rxd6 Rxc5 Qxa3 Rc7 Qa2 Kg7 Ra6 Kh8 Rf6
Qe8 Qa5
12 <= 1.50 1:06 17143797 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 e4 Qf4
c3
12 >= 1.48 1:14 19086524 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 e4 Qf4
c3 Ndxe4 f5
12 <= 1.48 1:15 19621653 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 e4 Qf4
c3 Ndxe4 f5
12 1.48 1:15 19621653 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 e4 Qf4
c3 Ndxe4 f5
13 <= 1.47 3:02 46606404 Rxd6 Rxc5 Qxa3 Rd5 Qf3 Rxd6 Nxd6 e4 Qf4
c3 Ndxe4 f5
13 >= 1.47 3:38 55969782 Rxc8 Nxc8 Rd7 Rb3 Qc2 Nb6 Rxe7 Bxe7 Nf3
Rb5 Nc3
13 1.47 3:38 55969782 Rxc8 Nxc8 Rd7 Rb3 Qc2 Nb6 Rxe7 Bxe7 Nf3
Rb5 Nc3
14 >= 1.47 4:13 64929235 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 >= 1.48 4:31 69704473 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 >= 1.55 4:43 73298282 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 >= 1.69 5:10 80577840 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 <= 1.92 7:29 115970639 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 <= 1.91 7:52 122387558 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 <= 1.88 8:09 127352184 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6
14 <= 1.80 8:40 135938189 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 >= 1.70 8:56 140132021 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 >= 1.72 9:05 142626559 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 <= 1.77 9:30 149795113 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 <= 1.75 9:41 153441768 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 >= 1.73 9:49 155627275 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 >= 1.75 9:55 157332168 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
14 1.75 9:55 157332168 Rxc8 Nxc8 Rd7 Rb3 Rxe7 Rxb2 Nf6+ Kh8 Rxf7
Bg7 Ne8 Nd6 Nxd6 c3 Rc7
Tord
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