Author: Vincent Lejeune
Date: 09:32:57 11/03/03
Go up one level in this thread
On November 03, 2003 at 12:22:20, Tord Romstad wrote: >[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 Hiarcs 9 seems to agree with your engine : 3 best moves after 5 min (barton 2800+) : 1. +- (3.60): 1.Txc8 Cxc8 2.Td7 Tb3 3.Dc1 Cb6 4.Txe7 Fxe7 5.Da1 Td3 6.Dxe5 Cd5 7.Db8+ Rg7 8.Dc8 Td1+ 9.Rh2 2. +- (2.20): 1.Dxa3 Cxe4 2.Cxe4 Txc5 3.Td7 De6 4.Td8 De7 5.Te8 Dxe8 6.Cf6+ Rh8 7.Cxe8 c3 8.Cf6 Rg7 9.Cd7 3. +- (1.41): 1.Txd6 Txc5 2.Dxa3 Tc6 3.Df3 Txd6 4.Cxd6 e4 5.Cgxe4 f5 6.Cxf5 gxf5 7.Dxf5 Rg7 8.Dd5 Df7 9.De5+ Rg6
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