Cooking The Opening Book with Stockfish

[royb]

Critter is a beast.

True, but I think you were very lucky to find it so quickly. Can you do it again?

Yes, please try again. I let Critter (1 thread) think for more than 15 minutes on my 2.3 GHz Core i7 and it never found Nxe6.

[Robert Flesher]

It looks like Stockfish has found an improvement in a rarely played line in the B96 Najdorf Sicilian.

In the following positon the "book" moves are 14.Bxb5 or 14.Re1, however in a virtuoso tactical display Stockfish 2.2.2 uncorked the nice 14.Nxe6!!


[d]rn2kb1r/1b1n1p1p/p3p1p1/1p2q1B1/3N3Q/2N5/PPP3PP/2KR1B1R w kq - 0 14


Spark 1.0 also finds this move. Here is one of the games the position came from:


[Event "?"]
[Site "?"]
[Date "1973.??.??"]
[Round "?"]
[White "Audino Marco (ITA)"]
[Black "Staroske Uwe (GER)"]
[Result "1-0"]
[ECO "B96"]
[WhiteElo "2238"]
[BlackElo "2421"]
[PlyCount "37"]
[EventDate "1973.??.??"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. e5
dxe5 9. fxe5 Qc7 10. Qe2 Nfd7 11. O-O-O Bb7 12. Qh5 g6 13. Qh4 Qxe5 14. Bxb5
axb5 15. Rhe1 Qc5 16. Rxe6+ fxe6 17. Nxe6 Qf5 18. Nxb5 Ra5 19. Nec7+ 1-0



And here is the Stockfish analysis carried out to 39 plies (although it looks like the eval is coming down a little bit on the 40th ply):



Analysis by Stockfish 2.2.2 JA 64bit:

14.Nf3 Bxf3 15.gxf3 h6 16.Bf4 Qf6 17.Qxf6 Nxf6 18.Be5 Bg7 19.Ne4 Nxe4 20.Bxg7 Rh7
+/- (0.96) Depth: 7/11 00:00:00 8kN
14.Nf3 Bxf3 15.gxf3 h6 16.Bf4 Qf6 17.Qg3 Bg7 18.Bd6 Qg5+ 19.Bf4
+/- (1.05) Depth: 8/12 00:00:00 13kN
14.Nf3 Bxf3 15.gxf3 h6 16.Bf4 Qf6 17.Qxf6 Nxf6 18.Be5 Bg7 19.Ne4 Nxe4 20.Bxg7 Rh7 21.Bxb5+ axb5 22.fxe4 Rxg7
+/- (1.05) Depth: 9/14 00:00:00 19kN
14.Nf3 Bxf3 15.gxf3 h6 16.Bf4 Qf6 17.Qxf6 Nxf6 18.Be5 Bg7 19.Ne4 Nxe4 20.Bxg7 Rh7 21.Bxb5+ axb5 22.fxe4 Rxg7
+/- (1.05) Depth: 10/17 00:00:00 25kN
14.Re1 Qc5 15.Bd3 Nc6 16.Nb3 Qd6 17.Kb1 Bg7 18.Ne4 Qc7 19.Nf6+ Nxf6 20.Bxf6 0-0 21.Bxg7 Kxg7
+/- (0.96) Depth: 11/18 00:00:00 190kN
14.Re1 Qc5 15.Bd3 Nc6 16.Nb3 Qd6 17.Rhf1 Nce5 18.Be4 Qb8 19.Nd4 b4 20.Bxb7 bxc3 21.Qe4 cxb2+ 22.Kxb2
+- (1.41) Depth: 12/22 00:00:00 290kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Bf4 Qb6 18.Be3 Qb7 19.Qh4 Bc5 20.Bh6 Nc6 21.Nxc6 Qxc6 22.Bg7 Be7 23.Qf2
+/- (1.33) Depth: 13/22 00:00:00 523kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Bf4 Qb6 18.Be3 Qb7 19.Qh4 Bc5 20.Bh6 Nc6 21.Nxc6 Qxc6 22.Bg7 Be7 23.Qf2
+/- (1.33) Depth: 14/22 00:00:00 540kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Bf4 Qb6 18.Be3 Qb7 19.Qh4 Bc5 20.Bh6 Nc6 21.Nxc6 Qxc6 22.Bg7 Be7 23.Qf2
+/- (1.33) Depth: 15/22 00:00:00 606kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Be2 0-0 20.Qe3 Nf6 21.Rhf1 e5 22.Bf3 e4 23.Bxe4 Re8 24.Rf4 Nd5 25.Bxd5 Qxe3+ 26.Rxe3 Rxe3
+/- (0.88) Depth: 16/26 00:00:00 1817kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Bf4 Qb6 18.Be3 Qb7 19.Qh4 e5 20.Nf3 Ra8 21.Rd1 Nc6 22.Ng5 Be7 23.Qh6 Bf8 24.Qh3 Bc5 25.Bg1 Bxg1 26.Rxg1
+/- (1.25) Depth: 17/27 00:00:00 3160kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Bf4 Qb6 18.Be3 Qb7 19.Nc6 Qxc6 20.Bxa7 Qxe4 21.Rxe4 Nc6 22.Bf2 Bc5 23.Bh4 Be7 24.Bf2 Nf6 25.Rf4 e5 26.Rf3 Ne4
+/- (1.01) Depth: 18/33 00:00:01 6581kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Nd5 20.Bxb5+ axb5 21.Nxb5 Qa6 22.Rxd5 exd5 23.Nxa7 Qxa2
+/- (0.92 --) Depth: 19/33 00:00:02 9076kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Nd5 20.Bxb5+ axb5 21.Nxb5 Qa6 22.Rxd5 exd5 23.Nxa7 Qxa2 24.Qc3 Qa1+ 25.Kd2
+/- (1.17 ++) Depth: 19/34 00:00:02 9590kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Nd5 20.Bxb5+ axb5 21.Nxb5 Qa6 22.Rxd5 exd5 23.Nxa7 Qxa2 24.Qc3 Qa1+ 25.Kd2
+/- (1.35 ++) Depth: 19/34 00:00:02 10119kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Be2 0-0 20.Kb1 Nc5 21.Qe3 Rd8 22.Bf3 Rad7 23.c3 Qh4
+/- (0.84) Depth: 19/34 00:00:02 11837kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Qd5 20.Qg3 Nbd7 21.Nxb5 Qxa2 22.Nc7+ Kd8 23.Nxe6+ fxe6 24.Qb8#
+/- (0.92 ++) Depth: 20/34 00:00:03 14161kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Qd5 20.Qg3 Nbd7 21.Nxb5 Qxa2 22.Nc7+ Kd8 23.Nxe6+ fxe6 24.Qb8#
+/- (1.01 ++) Depth: 20/34 00:00:03 14664kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Qd5 20.Qg3 Nbd7 21.Nxb5 Qxa2 22.Nc7+ Kd8 23.Nxe6+ fxe6 24.Qb8#
+/- (1.13 ++) Depth: 20/34 00:00:03 15007kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bh6 Nf6 19.Qf3 Qd5 20.Qg3 Nbd7 21.Nxb5 Qxa2 22.Nc7+ Rxc7 23.Qxc7 Qa1+ 24.Kd2 Qxb2 25.Qc8+ Bd8 26.Bxa6 Nc5
+/- (0.76 --) Depth: 20/34 00:00:04 17059kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bf4 Qb4 19.Bh6 Bf8 20.Be3 Be7 21.Kb1 0-0 22.c3 Qd6 23.Qf3 Ne5 24.Nxb5 axb5 25.Rxd6 Nxf3 26.Bxa7 Bxd6 27.gxf3
+/- (0.72) Depth: 20/35 00:00:06 25526kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bf4 Qb4 19.Bh6 Bf8 20.Be3 Be7 21.Kb1 0-0 22.c3 Qd6 23.Qf3 Qc7 24.Nc2 Nc5
+/= (0.64 --) Depth: 21/35 00:00:09 38320kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bf4 Qb4 19.Bh6 Bf8 20.Be3 Bg7 21.c3 Qa4 22.Nf5 Qxe4 23.Nd6+ Ke7 24.Nxe4 Rc7 25.Kb1 e5
+/= (0.56 --) Depth: 21/35 00:00:11 48844kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Be2 0-0 20.Qe3 Nf6 21.Rhf1 e5 22.Nb3 Rc7 23.Qg5 Nbd7 24.Bxa6 Qe6 25.Bd3 Ra8 26.Kb1
+/= (0.68) Depth: 21/36 00:00:13 55738kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bc4 0-0 20.Qg4 Nf6 21.Qh4 e5 22.Kb1 Rc8 23.Nf3 e4 24.Bd3
+/- (0.76 ++) Depth: 22/36 00:00:14 60804kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bc4 0-0 20.Qg4 Nf6 21.Qh4 e5 22.Kb1 Rc8 23.Nf3 e4 24.Bd3
+/- (0.84 ++) Depth: 22/36 00:00:14 61489kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bc4 0-0 20.Qg4 Nb6 21.Nxe6 Nxc4 22.Nxf8 Qb4 23.Qd4 Nc6 24.Qf6 Qd2+ 25.Kb1 Nd4
+/= (0.60 --) Depth: 22/36 00:00:20 84039kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bc4 0-0 20.Qg4 Nb6 21.Bb3 Qc5 22.Rhf1 N8d7 23.Kb1 Rc7 24.Qg3 a5 25.c3 Nc4 26.Bxc4 Qxc4 27.Rf2
+/- (0.76) Depth: 22/36 00:00:21 92525kN
14.Re1 Qd6 15.Bxb5 axb5 16.Ncxb5 Qc5 17.Qf4 e5 18.b4
+/- (0.84 ++) Depth: 23/36 00:00:23 100mN
14.Re1 Qd6 15.Bxb5 axb5 16.Ncxb5 Qc5 17.Qf4 e5 18.b4
+/- (0.92 ++) Depth: 23/36 00:00:24 103mN
14.Nxe6 fxe6 15.Bd3 Nc5 16.Bxg6+ hxg6 17.Rd8+ Kf7 18.Rf1+ Kg7 19.Bf6+
+/- (1.05 ++) Depth: 23/36 00:00:33 143mN
14.Nxe6 fxe6 15.Bd3 Nc5 16.Bxg6+ hxg6 17.Rd8+ Kf7 18.Rf1+ Kg7 19.Bf6+
+/- (1.23 ++) Depth: 23/36 00:00:34 144mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 Nc6 17.Rhe1 Nc5 18.Kb1 Be7 19.Bxe7 Nxe7 20.Bxb7 Nxb7 21.Qe4 0-0 22.Qxb7 Nd5 23.Qc6 Nxc3+ 24.bxc3 Ra7 25.Qxe6+ Qf7 26.Qd6 Qf2 27.g4 Kg7 28.g5 Kg8 29.Re6
+/- (0.88) Depth: 23/38 00:00:35 153mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 Nc6 17.Rhe1 Nc5 18.Kb1 Be7 19.Bxe7 Nxe7 20.Bxb7 Nxb7 21.Qe4 0-0 22.Qxb7 Nd5 23.Qc6 Nxc3+ 24.bxc3 Ra7 25.Qxe6+ Qf7 26.Qd6 Qf2 27.g4 Kg7 28.g5 Kg8 29.Re6
+/- (0.88) Depth: 24/38 00:00:41 176mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 Nc6 17.Rhe1 Nc5 18.Qh3 e5 19.Nd5 Nd4 20.Nf6+ Kd8 21.Bxb7 Qxb7 22.Rxe5
+/- (0.96 ++) Depth: 25/41 00:00:46 199mN
14.Nxe6 fxe6 15.Bd3 Ba3 16.Rhe1 Bxb2+ 17.Kxb2
+/- (1.05 ++) Depth: 25/41 00:00:47 203mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe1 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Qf7 22.Qd6 0-0 23.Rxe7 Qf5 24.g4
+/- (1.17 ++) Depth: 25/41 00:00:48 206mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 Bxe4 17.Qxe4 h6 18.Qxa8 hxg5 19.Rxd7 Qxd7 20.Qxb8+ Qd8 21.Qe5
+/- (1.35 ++) Depth: 25/41 00:00:49 212mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 Ra7 17.Rhe1 Bxe4 18.Nxe4 h6 19.Qg4 hxg5 20.Qxe6+ Be7 21.Nd6+ Kd8 22.Nf7+ Kc7 23.Qxe7 Rf8 24.Qe3 Qxf7 25.Qxa7+ Kc8 26.Kb1
+- (1.62 ++) Depth: 25/41 00:00:53 229mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Rxh2 22.Qd6 Rh7 23.Nxe7 Qxe7 24.Rxe7+ Rxe7 25.Qxg6+ Kd8 26.g4 Re5 27.Kb1 a5 28.b3 a4 29.Qg8+ Kc7
+- (1.65) Depth: 25/41 00:01:01 267mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Rxh2 22.Qd6 Rh7 23.Nxe7 Qxe7 24.Rxe7+ Rxe7 25.Qxg6+ Kd8 26.Qxg5 Nc6 27.Rd6 Rb6 28.Re6
+- (1.73 ++) Depth: 26/42 00:01:04 278mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Rxh2 22.Qd6 Rh7 23.Nxe7 Qxe7 24.Rxe7+ Rxe7 25.Qxg6+ Kd8 26.Qxg5 Nc6 27.Rd6 Rb6 28.Re6
+- (1.81 ++) Depth: 26/42 00:01:05 285mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Rh7 22.Qd6 Qf7 23.g3 Kd8
+- (1.57 --) Depth: 26/42 00:01:10 305mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Be4 Qf6 21.Bxg6+ Kd8
+/- (1.39 --) Depth: 26/42 00:01:14 326mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Rh7 22.Qd6 Qf7 23.Kb1 Kd8 24.Nxe7 Qf8 25.Nc6+ Kc8 26.Qxg6 Rf7 27.Nd4 Nc5 28.Nf5
+- (1.93 ++) Depth: 26/49 00:01:16 332mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Be4 h6 17.Bxb7 hxg5 18.Qe4 Ra7 19.Qxe6+ Be7 20.Nd5 Rxb7 21.Rhe1 Rh7 22.Kb1 Qf7 23.Qd6 Kd8 24.Nxe7 Qf8 25.Nc6+ Kc8 26.Qxg6 Rf7 27.Nd4 Rb6 28.Qxg5 Nc5 29.h4 Nbd7 30.g4 Kb8 31.Nf5 Ne6 32.Qe3 Ndc5 33.h5 Rc6
+- (1.45) Depth: 26/49 00:01:18 341mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kxd7 20.Rd1+ Ke8 21.Qa4+ Kf7 22.Rf1+
+- (1.53 ++) Depth: 27/49 00:01:30 395mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 e4 19.Nc7+ Kf7 20.Rf1+
+- (1.61 ++) Depth: 27/49 00:01:33 410mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 Ne5 17.Be4 Nbc6 18.Bxc6+ Bxc6 19.Qh3 Bd7 20.Bf4 Nc6 21.Rxe6+ Bxe6 22.Qxe6+ Be7
+- (1.73 ++) Depth: 27/49 00:01:35 422mN
14.Nxe6 f6 15.Bxf6 Nxf6 16.Bxb5+ axb5 17.Rhe1
+- (1.91 ++) Depth: 27/49 00:01:41 447mN
14.Nxe6 f6 15.Bxf6 Nxf6 16.Bxb5+ axb5 17.Rhe1
+- (2.19 ++) Depth: 27/49 00:01:46 472mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Kb8 23.Nb6 Ka7 24.Nxa8 Kxa8 25.Rxe5 Qc7 26.c4 Rf8 27.Re2 Kb8 28.h4 Rf1+ 29.Kc2 Rf4 30.b3 Be4+ 31.Kb2 Bd3 32.Rd2 h6 33.Qd5 Be4 34.Qd8+ Qxd8 35.Rxd8+ Kc7 36.Rd7+ Kb6
+- (2.42) Depth: 27/49 00:01:56 514mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Kb8 23.Rxe5 Rf8 24.Qg3 Ka7 25.Qe3+ Kb8 26.Nb6 Rf1+ 27.Kd2 Bxg2 28.Nd7+ Kc8 29.Qc5+ Kd8 30.Qb6+ Ke8 31.Bh3+
+- (2.50 ++) Depth: 28/50 00:02:08 572mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 Ne5 17.Bxb5+ Kf7 18.Rd8 Kg8 19.Bh6
+- (2.58 ++) Depth: 28/50 00:02:18 617mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Rxe5 Raf8 23.Bc4 Re8 24.Rxe8 Rxe8
+- (2.34 --) Depth: 28/50 00:02:29 660mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Rxe5 Raf8 23.Bc4 Re8 24.Rxe8 Rxe8
+- (2.16 --) Depth: 28/50 00:02:34 680mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Rb8 30.Rf1 e4 31.Qa5+ Kd7 32.Qb5+ Ke7 33.Qg5+ Kd6 34.Qg3+ Kd7 35.Qg4+ Kc7 36.Rf7+ Kb6
+- (2.66) Depth: 28/50 00:02:38 700mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Rb8 30.Rf1 e4 31.Qa5+ Kd7 32.Qb5+ Ke7 33.Qg5+ Kd6 34.Qg3+ Kd7 35.Qg4+ Kc7 36.Rf7+ Kb6 37.Qe6+
+- (2.74 ++) Depth: 29/54 00:02:49 752mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 Ne5 17.Bxb5+ Kf7 18.Rd8
+- (2.82 ++) Depth: 29/63 00:03:03 817mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qb6 31.Bxc8 Rxc8 32.Qxb6+ Kxb6 33.Re1 Rf8 34.Rxe5 Rf1+ 35.Kc2 Rf2+ 36.Kb3 Rxg2 37.h4 Kc6 38.Re7 h6 39.a4 Kc5 40.Rh7 Rf2
+- (2.90) Depth: 29/75 00:03:31 945mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7
+- (2.98 ++) Depth: 30/75 00:04:08 1120mN
14.Nxe6 fxe6 15.Bd3 Be7 16.Bxe7 Qh5 17.Qb4 Nc6 18.Qd6 Nxe7 19.Bxg6+ hxg6 20.Qxd7+ Kf8 21.Qxb7 Qg5+ 22.Kb1 Re8 23.Qxa6 Qxg2 24.Qxe6 Rxh2 25.Rxh2
+- (3.07 ++) Depth: 30/75 00:04:39 1268mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Rxe5 Rae8 23.a3
+- (2.82 --) Depth: 30/75 00:05:29 1497mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qb6 31.Qxb6+ Kxb6 32.Bxc8 Rxc8 33.Re1 Rf8 34.Rxe5 Rf2 35.Re7 Rxg2 36.Rxh7 Re2
+- (2.78) Depth: 30/75 00:05:40 1547mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+
+- (2.86 ++) Depth: 31/75 00:06:04 1655mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 Ne5 17.Bxb5+ Nbc6 18.Bxc6+ Bxc6 19.Qf4 h6 20.Bf6
+- (2.94 ++) Depth: 31/75 00:06:34 1792mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+
+- (2.70 --) Depth: 31/75 00:07:14 1976mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qb6 31.Bxc8 Rxc8 32.Qa3 Kb7 33.Qe7+ Qc7 34.Qb4+ Qb6 35.Qe4+ Qc6 36.Re1 Re8 37.Kc2 Qxe4+ 38.Rxe4
+- (2.70) Depth: 31/75 00:07:20 2002mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kxd7 20.Rd1+ Ke6
+- (2.78 ++) Depth: 32/75 00:08:06 2224mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kxd7 20.Rd1+ Ke6 21.Qh3+ Kf7 22.Bxe7 Rhb8 23.Bg5 Kg8 24.Rd7
+- (2.86 ++) Depth: 32/75 00:08:30 2339mN
14.Nxe6 fxe6 15.Bd3 Ba3 16.Rhe1 Qxc3 17.Rxe6+ Kf7
+- (2.98 ++) Depth: 32/75 00:09:09 2526mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qb6 31.Bxc8 Rxc8 32.Qa3 Kb7 33.Qe7+ Qc7 34.Qb4+ Qb6 35.Qe4+ Qc6 36.Re1 Re8 37.Kc2 Qxe4+ 38.Rxe4 Kb6 39.b3 g5 40.a4 Kc5 41.a5
+- (3.03) Depth: 32/75 00:11:16 3121mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qd6 31.Bxc8 Rxc8 32.Qa7+ Kc6 33.Qa4+ Kb6 34.Qb3+ Ka7 35.Rd1 Qc5 36.Qa4+ Kb8 37.Qa6 e4
+- (3.11 ++) Depth: 33/75 00:13:42 3821mN
14.Nxe6 fxe6 15.Bd3 Bg7 16.Rhe1 0-0 17.Rxe5 Nxe5 18.Be4 Nbc6 19.a4 b4 20.Ne2 Rae8 21.Nf4 Na5 22.Nd3 Nxd3+ 23.Bxd3 Nc6 24.Be4 Rf7 25.Rd6 Na5 26.Bxb7 Nxb7 27.Rxa6 Nc5
+- (2.94 --) Depth: 33/75 00:17:50 4981mN
14.Nxe6 fxe6 15.Bd3
+- (3.19 ++) Depth: 33/75 00:18:32 5178mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8
+- (2.82 --) Depth: 33/96 00:21:08 5946mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5
+- (2.55 --) Depth: 33/96 00:22:49 6405mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qb6 31.Bxc8 Rxc8 32.Qa3 Kb7 33.Qe7+ Qc7 34.Qb4+ Qb6 35.Qe4+ Qc6 36.Qxe5 Qxg2 37.Qb5+ Ka7 38.Qd7+ Qb7 39.Rd1 Rc7 40.Qd4+ Qb6 41.Kc2 Rf7 42.Qxb6+ Kxb6 43.a4 Ra7 44.b3 Kc6 45.Rd8 Kc7 46.Rf8
+- (3.27) Depth: 33/96 00:24:50 6968mN
14.Nxe6 fxe6 15.Bd3 Bg7
+- (3.19 --) Depth: 34/96 00:30:55 8722mN
14.Nxe6 fxe6 15.Bd3 Bg7 16.Rhe1 0-0 17.Rxe5 Nxe5 18.Be4 Nbc6 19.a4 Rf7 20.Qh3 b4 21.Ne2 Re8 22.Qh4 a5
+- (3.11 --) Depth: 34/96 00:32:50 9258mN
14.Nxe6 fxe6 15.Bd3 Bg7 16.Rhe1 0-0 17.Rxe5 Nxe5 18.Be4 Nbc6 19.a4 Rf7 20.Qh3 b4 21.Ne2 Re8 22.Nf4 Bc8 23.g3 Rd7 24.Rxd7 Bxd7 25.b3
+- (2.98 --) Depth: 34/96 00:35:00 9855mN
14.Nxe6 fxe6 15.Bd3 Bg7 16.Rhe1 0-0 17.Rxe5 Nxe5 18.Be4 Bxe4 19.Nxe4 Nbc6 20.Nc5
+- (3.35 ++) Depth: 34/96 00:37:06 10437mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5
+- (2.80 --) Depth: 34/96 00:42:28 11968mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Raf8 24.Qe3 Kd8 25.Qb6+ Qc7 26.Qe6 Qd7 27.Qxe5 Qc7 28.Qe6 Qf4+ 29.Kb1 Qf6 30.Qe2 Re8 31.Be6 Qxe6 32.Qxe6 Rxe6 33.Rxe6 Rf8 34.b4 Rf4 35.a3 a5 36.bxa5 Kd7 37.Rb6 Kc7 38.Ra6 Rf2 39.Ra7+ Kc6
+- (3.07) Depth: 34/96 00:44:13 12468mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 Qf7 17.Qh3 Nc5 18.Bxb5+ Nc6 19.Nd5 axb5 20.Nf6+ Ke7 21.Qc3
+- (3.15 ++) Depth: 35/96 00:55:49 15796mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7
+- (2.98 --) Depth: 35/96 01:00:36 17141mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Raf8
+- (2.86 --) Depth: 35/96 01:05:11 18425mN
14.Nxe6 fxe6
+- (2.68 --) Depth: 35/96 01:10:32 19969mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Raf8 24.Qg3 Kd8 25.Rd1 Qc7 26.Qh4+ Ke8 27.g3 Rf2 28.Bb3 Qb6 29.Ba4+ Kf8 30.Qh6+ Kg8 31.Bb3+ Rf7 32.Bxf7+ Kxf7
+- (3.23 ++) Depth: 35/96 01:17:01 21856mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.c3 Qb6 31.Bxc8 Rxc8 32.Qa3 Kb7 33.Re1 Rc7 34.Qb4 Qxb4 35.cxb4 Rf7 36.Rxe5 Rf2 37.Re7+ Kb6
+- (3.03) Depth: 35/96 01:24:20 24059mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8
+- (3.11 ++) Depth: 36/96 01:30:52 26035mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 Kf7 17.Be4 Bxe4 18.Qxe4 Qe5 19.Qxe5 Nxe5
+- (3.19 ++) Depth: 36/96 01:35:43 27468mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7
+- (2.94 --) Depth: 36/96 01:46:04 30422mN
14.Nxe6 fxe6 15.Bd3 Qg7
+- (2.76 --) Depth: 36/96 01:54:05 32687mN
14.Nxe6 fxe6 15.Bd3 Qg7
+- (2.49 --) Depth: 36/96 01:59:42 34253mN
14.Nxe6 fxe6 15.Bd3 Be7 16.Bxe7 Qh5 17.Qb4 Bxg2 18.Rhe1 Nc6
+- (3.31 ++) Depth: 36/96 02:05:22 35940mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.Bxc8 Rxc8 31.a4 Kb8 32.Qb5+ Ka7 33.Rf1 Qc4 34.Qxc4 Rxc4 35.b3 Rh4 36.h3 Kb6 37.Kb2 Kc5 38.Kc3 Re4 39.Kd3 Rd4+ 40.Ke3 Rd7 41.c3
+- (3.43) Depth: 36/96 02:26:31 42241mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7
+- (3.51 ++) Depth: 37/96 02:43:42 47417mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7
+- (3.35 --) Depth: 37/96 03:01:07 52420mN
14.Nxe6 fxe6 15.Bd3 Qg7
+- (3.23 --) Depth: 37/96 03:15:12 56447mN
14.Nxe6 fxe6 15.Bd3 Qg7
+- (3.05 --) Depth: 37/96 03:22:22 58485mN
14.Nxe6 fxe6 15.Bd3 Qc5 16.Rhe1 Kf7 17.Be4 Bxe4 18.Nxe4 Qc8 19.Qh3 Qe8 20.Nd6+
+- (3.59 ++) Depth: 37/96 03:36:05 62657mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Raf8 24.Qe3 Kd8 25.Qb6+ Qc7 26.Qe6 Qc8 27.Qd6+ Qd7 28.Qxa6 Qxd5 29.Rd1 Qxd1+ 30.Kxd1 Ke7 31.b4 Rb8 32.Ke2 Rhd8 33.Qa7+ Ke6 34.Qxh7 Rxb4 35.Qxg6+ Ke7
+- (3.27) Depth: 37/96 04:05:52 71461mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7
+- (3.35 ++) Depth: 38/96 04:17:27 74935mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7
+- (3.19 --) Depth: 38/96 04:48:31 84438mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Bxg5+ 19.Qxg5 Nxd7
+- (3.43 ++) Depth: 38/96 04:54:17 86130mN
14.Nxe6 f6 15.Re1
+- (3.61 ++) Depth: 38/96 05:13:32 92193mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.Bxc8 Rxc8 31.a4 Qb6 32.Qe2 Qe6 33.Re1 Re8 34.Qb5 Qc6 35.Qa5+ Qb6 36.Rxe5
+- (3.31) Depth: 38/96 05:35:27 98687mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5
+- (3.39 ++) Depth: 39/96 05:51:17 103367mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5
+- (3.23 --) Depth: 39/96 07:02:11 124544mN
14.Nxe6 fxe6
+- (3.11 --) Depth: 39/96 08:06:29 142923mN
14.Nxe6 Qxe6 15.Bxb5 axb5 16.Nxb5 Na6 17.Rhe1
+- (3.47 ++) Depth: 39/96 08:33:23 150927mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qe3 Qf6 25.Qa7+ Kd8 26.Bb7 Qf4+ 27.Kb1 Qd2 28.Rc1 Qd4 29.Qxa6 Kc7 30.Bxc8 Rxc8 31.a4 Qb6
+- (3.55) Depth: 39/100 09:31:43 168857mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1
+- (3.63 ++) Depth: 40/100 10:55:37 196068mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7
+- (3.47 --) Depth: 40/100 12:17:59 221255mN
14.Nxe6 fxe6
+- (3.35 --) Depth: 40/100 13:05:27 235105mN
14.Nxe6 fxe6
+- (3.17 --) Depth: 40/100 14:54:45 269656mN
14.Nxe6 fxe6
+- (2.89 --) Depth: 40/100 16:06:51 290695mN
14.Nxe6 fxe6
+- (2.48 --) Depth: 40/100 17:34:40 316261mN

(Doc Holiday, Columbus, Ohio 24.01.2012)


I should add that I don't know for sure if this move has ever been tried before, so if someone finds it in a database please let me know

Once again my evil creation "Dissident Aggressor" for Zappa Mexico II does not fail.



New game
rn2kb1r/1b1n1p1p/p3p1p1/1p2q1B1/3N3Q/2N5/PPP3PP/2KR1B1R w kq - 0 1

Analysis by Zappa Mexico II:

1.Kb1 Bg7 2.Be7 Qh5 3.Qf2 Kxe7 4.Be2 Qc5 5.Rhf1
+/= (0.49) Depth: 10/37 00:00:00 534kN
1.Kb1 Bg7 2.Be7 Qh5 3.Qf2 Kxe7 4.Be2 Qc5 5.Rhf1
+/= (0.49) Depth: 10/37 00:00:00 535kN
1.Kb1 Bg7 2.Bxb5 0-0 3.Rhe1 Qc7 4.Bxd7 Nxd7 5.Rxe6 fxe6 6.Nxe6
= (0.13) Depth: 11/41 00:00:02 7962kN
1.Nf3 Qc7 2.Qd4 Rg8 3.Qh4 h6 4.Bxh6 Rh8 5.Bf4 Rxh4 6.Bxc7
= (0.17) Depth: 11/41 00:00:02 7964kN
1.Nf3 Qc7 2.Qd4 Rg8 3.Qh4 h6 4.Bxh6 Rh8 5.Bf4 Rxh4 6.Bxc7
= (0.17) Depth: 11/41 00:00:02 7964kN
1.Nf3 Qc7 2.Qd4 Rg8 3.Qh4 h6 4.Bxh6 Rh8 5.Bf4 Rxh4 6.Bxc7
= (0.17) Depth: 12/41 00:00:02 7964kN
1.Bxb5 axb5 2.Rhe1 Qc5 3.Qg4 f5 4.Qg3 e5 5.Ne6 Qc4 6.Rxe5 Kf7 7.Rd4 h5
+- (2.54) Depth: 12/41 00:00:06 21044kN
1.Bxb5 axb5 2.Rhe1 Qc5 3.Qg4 f5 4.Qg3 e5 5.Ne6 Qc4 6.Rxe5 Kf7 7.Rd4 h5
+- (2.54) Depth: 12/42 00:00:07 22482kN
1.Bxb5 axb5 2.Rde1 Qc5 3.Rhf1 e5 4.Qf4 Bd5 5.Rxe5+ Nxe5 6.Qxe5+ Be6 7.Qxh8 Qxg5+ 8.Kb1 Qxg2 9.Rd1
+- (1.98) Depth: 13/45 00:00:27 85441kN
1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhf1 Be7 4.Kb1 Kd8 5.Bxb5 axb5 6.Bxe7+ Qxe7
+- (4.03) Depth: 13/45 00:00:35 114mN
1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhf1 Be7 4.Kb1 Kd8 5.Bxb5 axb5 6.Bxe7+ Qxe7
+- (4.03) Depth: 13/45 00:00:37 120mN
1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Rg8 4.Kb1 Be7 5.Bxe7 Qg7 6.Qh3 Qxe7 7.Rhe1 e5 8.Rf1
+- (4.29) Depth: 14/47 00:01:11 238mN
1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Rg8 4.Kb1 Be7 5.Bxe7 Qg7 6.Qh3 Qxe7 7.Rhe1 e5 8.Rf1
+- (4.29) Depth: 14/47 00:01:12 242mN
1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Rg8 4.bxa3 Qg7 5.Qh3 Qe5 6.Qh4 Qxc3 7.Qxh7 Nf6 8.Bxg6+ Kf8 9.Bh6+ Rg7 10.Bxg7+ Ke7 11.Bxf6+ Kxf6 12.Qxb7 Qxa3+
+- (4.69) Depth: 15/49 00:01:39 334mN
1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Rg8 4.bxa3 Qg7 5.Qh3 Qe5 6.Qh4 Qxc3 7.Qxh7 Nf6 8.Bxg6+ Kf8 9.Bh6+ Rg7 10.Bxg7+ Ke7 11.Bxf6+ Kxf6 12.Qxb7 Qxa3+
+- (4.69) Depth: 15/49 00:01:43 346mN

(, Microsoft 24.01.2012)

[kgburcham]

[d] rn2kb1r/1b1n1p1p/p3p1p1/1p2q1B1/3N3Q/2N5/PPP3PP/2KR1B1R w kq -

Critter 1.4 64-bit SSE4 (4096 MB)

18/50 0:09 +0.57++ 1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Bxg2 4.Bxg6+ hxg6 5.Qxg6+ Kf8 6.Rhf1+ Bxf1 7.Rxf1+ Nf6 8.Rxf6+ (104.855.596) 11206
18/54 0:13 +0.97++ 1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Bxg2 4.Bxg6+ hxg6 5.Qxg6+ Kf8 6.Rhf1+ Bxf1 7.Rxf1+ Nf6 8.Rxf6+ (158.018.285) 12011
18/62 0:23 +1.33 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (295.038.934) 12797
19/62 0:27 +1.42++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (365.990.000) 13158
19/65 0:30 +1.51++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (405.014.515) 13228
19/66 0:32 +1.40 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (430.478.532) 13242
20/66 0:38 +1.40 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (531.327.359) 13666
21/66 0:50 +1.40 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (714.645.800) 14242
22/66 1:18 +1.40 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (1.194.071.418) 15141
23/66 2:23 +1.48++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (2.271.539.013) 15794
23/66 3:13 +1.57++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (3.081.230.427) 15899
23/73 4:43 +1.70++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (4.576.983.892) 16146
23/78 6:55 +1.89++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (6.785.478.613) 16314
23/81 9:00 +1.91 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (8.841.826.315) 16355
24/81 16:03 +1.97 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (16.348.492.867) 16969
25/81 20:50 +1.90 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (21.599.672.115) 17276
26/81 41:11 +2.01++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 (43.570.504.612) 17628

Houdini 2.0c Pro x64 (4096 MB)
22/60 0:53 +0.30++ 1.Nxe6 (1.540.835.892) 29039
22/60 0:55 +0.44++ 1.Nxe6 (1.612.671.057) 28930
22/60 1:03 +0.79++ 1.Nxe6 (1.813.250.538) 28725
22/67 1:40 +1.77 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Be4 Bxe4 5.Nxe4 a5 (2.878.333.372) 28769
22/67 1:47 +1.77 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Be4 Bxe4 5.Nxe4 a5 (3.092.210.117) 28663

Stockfish 2.2.1 JA 64bit SSE4.2 (4096 MB)

18/32 0:02 +1.49++ 1.Nxe6 fxe6 2.Bd3 Bxg2 3.Rhe1 (14.419.718) 5155
18/32 0:02 +2.15++ 1.Nxe6 Qxe6 2.Bxb5 axb5 3.Nxb5 Bxg2 4.Nc7+ (15.537.822) 5288
18/32 0:03 +1.85 1.Nxe6 fxe6 2.Bd3 Qg7 3.Be4 h6 4.Bxb7 hxg5 5.Qe4 Ra7 6.Qxe6+ Be7 7.Ne4 Rxb7 8.Nd6+ Kd8 9.Nxb7+ Kc8 10.Na5 Bd8 11.Nc6 Kb7 (17.284.839) 5586
19/32 0:03 +1.77-- 1.Nxe6 fxe6 2.Bd3 Qg7 3.Be4 h6 4.Bxb7 hxg5 5.Qe4 Ra7 6.Qxe6+ Be7 7.Ne4 Rxb7 8.Nd6+ Kd8 9.Nxb7+ Kc7 10.Qd5 Qe5 (20.968.470) 6212
19/32 0:03 +1.69-- 1.Nxe6 fxe6 2.Bd3 Qg7 3.Be4 h6 4.Bxb7 hxg5 5.Qxg5 Qh6 (22.913.149) 6516
20/32 0:04 +1.37 1.Nxe6 fxe6 2.Bd3 Qg7 3.Be4 h6 4.Bxb7 hxg5 5.Qg4 Ra7 6.Qxe6+ Be7 7.Nd5 Rxb7 8.Rhe1 Rb6 9.Nxb6 Nxb6 10.Qxb6 O-O 11.Qe6+ Rf7 12.Rf1 Bf6 13.c3 Kh7 14.Kb1 (33.948.986) 7731
21/32 0:04 +1.45++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Be4 h6 4.Bxb7 hxg5 5.Qg4 Ra7 6.Qxe6+ Be7 7.Nd5 Rxb7 8.Rhe1 Rb6 9.Nxb6 Nxb6 10.Qxb6 O-O 11.Qe6+ Rf7 12.Rf1 Bf6 13.c3 Kh7 14.Rd8 (34.706.813) 7766
21/32 0:04 +1.53++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Be4 h6 4.Bxb7 hxg5 5.Qg4 Ra7 6.Qxe6+ Be7 7.Nd5 Rxb7 8.Rhe1 Rb6 9.Nxb6 Nxb6 10.Qxb6 O-O 11.Qe6+ Rf7 12.Rf1 Bf6 13.c3 Kh7 14.Qc8 (34.980.930) 7773
21/47 0:06 +3.13++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 axb5 5.Nxb5 Bxg2 6.Nc7+ (59.137.008) 9164
21/59 0:07 +2.58 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 6.Bxd7+ Kd8 7.Ba4 Bxg5+ 8.Qxg5+ Kc8 9.Rxe5 Rf8 10.g3 Kb8 11.Qe3 Qc7 12.Re7 Qd6 13.Nd1 Rf1 14.c4 (71.831.469) 9231
22/59 0:08 +2.50-- 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 6.Bxd7+ Kd8 7.Ba4 Bxg5+ 8.Qxg5+ Kc8 9.Rxe5 Rf8 10.g3 Kb8 11.Qe3 Rd8 12.Re7 Qd4 13.Rxb7+ Kxb7 (77.373.903) 9449
22/59 0:08 +2.42-- 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 6.Bxd7+ Kd8 7.Ba4 Bxg5+ 8.Qxg5+ Kc8 9.Rxe5 Rf8 10.g3 Kb8 11.Qe3 Rd8 12.Re7 Qd4 13.Rxb7+ Kxb7 (85.498.120) 9719
22/59 0:10 +3.11 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.Qh3 Rae8 7.Kb1 Rf7 8.Bc1 Bf8 9.Ne2 Na5 10.Ng3 Nec4 11.c3 e5 12.Rd7 Rxd7 13.Qxd7 Re7 (113.234.828) 10382
23/59 0:11 +3.03-- 1.Nxe6 fxe6 2.Bd3 Be7 3.Bxe7 Qh5 4.Qb4 Bxg2 5.Be4 Bxh1 6.Bxh1 a5 7.Qd4 e5 8.Qd5 Ra6 9.Bd6 Rxd6 10.Qxd6 Qg5+ 11.Kb1 Qe7 12.Qd5 Nf6 (124.069.450) 10544
23/59 0:12 +3.19++ 1.Nxe6 fxe6 2.Bd3 Be7 3.Bxe7 Qh5 4.Qb4 Bxg2 5.Rhg1 Nc6 6.Qd6 Nxe7 7.Rxg2 Rd8 8.Qxa6 Qh3 9.Re2 O-O 10.Qxe6+ Qxe6 11.Rxe6 Kf7 12.Re3 Nf6 13.Nxb5 Ned5 14.Bc4 (133.877.779) 10604
23/59 0:13 +3.27 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.a4 b4 7.Ne2 Rae8 8.Kb1 Rf7 9.Nf4 Na5 10.Nd3 Bxe4 11.Qxe4 Nec4 12.Bc1 Rd7 13.Rf1 Bd4 14.b3 (145.024.445) 10692
25/59 0:15 +3.15-- 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.a4 b4 7.Ne2 Rae8 8.Kb1 Rf7 9.Nf4 Na5 10.Nd3 b3 11.cxb3 Rd7 12.Ka2 Rd4 13.Nf2 Rxd1 14.Nxd1 (170.678.036) 11022
26/59 0:19 +3.15++ 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.a4 b4 7.Ne2 Rae8 8.Nf4 Na5 9.Bxb7 Nxb7 10.Nh3 a5 11.Be3 Rf7 12.Bd4 Rc7 13.Qg3 Bh6+ 14.Kb1 (231.345.766) 11576
27/59 0:27 +3.19-- 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.Ne2 Na5 7.Ng3 Rf7 8.Qh3 Re8 9.Bxb7 Nxb7 10.Ne4 Rf5 11.c3 Nf7 12.Be3 Ne5 13.g4 Rf3 (337.999.076) 12207
28/59 0:33 +3.11++ 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.Ne2 Na5 7.Ng3 Rf7 8.c3 Raf8 9.Bxb7 Nxb7 10.Ne4 h5 11.Kb1 Rd7 12.Rxd7 Nxd7 13.Bc1 a5 14.Qe7 (420.548.814) 12606
29/59 0:47 +3.19++ 1.Nxe6 fxe6 2.Bd3 Bg7 3.Rhe1 O-O 4.Rxe5 Nxe5 5.Be4 Nbc6 6.a4 b4 7.Ne2 (614.504.894) 13048
30/62 1:10 +3.07++ 1.Nxe6 fxe6 2.Bd3 Qg7 3.Rhe1 e5 4.Bxb5 Be7 5.Rxd7 Nxd7 6.Bxd7+ Kd8 7.Be6 Bxg2 8.Bxe7+ Qxe7 9.Qg4 Bc6 10.Qc4 Qg5+ 11.Kb1 Qd2 12.Rf1 Qd6 13.Rd1 (961.026.487) 13613

[peter]

[d] rn2kb1r/1b1n1p1p/p3p1p1/1p2q1B1/3N3Q/2N5/PPP3PP/2KR1B1R w kq -

Critter 1.4 64-bit SSE4 (4096 MB)

18/50 0:09 +0.57++ 1.Nxe6 fxe6 2.Bd3 Ba3 3.Qh6 Bxg2 4.Bxg6+ hxg6 5.Qxg6+ Kf8 6.Rhf1+ Bxf1 7.Rxf1+ Nf6 8.Rxf6+ (104.855.596) 11206

Houdini 2.0c Pro x64 (4096 MB)
22/60 0:53 +0.30++ 1.Nxe6 (1.540.835.892) 29039

Stockfish 2.2.1 JA 64bit SSE4.2 (4096 MB)

18/32 0:02 +1.49++ 1.Nxe6 fxe6 2.Bd3 Bxg2 3.Rhe1 (14.419.718) 5155

Hi!

144896: Bronstein,L - Aparicio,A, ARG-ch Buenos Aires 1983
rn2kb1r/1b1n1p1p/p3p1p1/1p2q1B1/3N3Q/2N5/PPP3PP/2KR1B1R w kq - 0 1

Analysis by Chiron 1.1a 64bit:

14.Te1 Dd6 15.Se4 Lxe4 16.Dxe4 h6
+/- (1.00) Tiefe: 6/21 00:00:00 19kN
...
14.Sxe6
+/- (0.98 !) Tiefe: 21/50 00:00:47 224mN
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 e5 17.Le4 h6 18.Lxb7 hxg5 19.Dg4 Ta7 20.Le4 Lc5 21.Tf1 Kd8 22.Kb1 Ld4 23.Sd5 Sc5 24.Dxg5+ Te7 25.Sxe7 Sxe4 26.Dg4 Dxe7 27.Dxe4 Txh2 28.Dxg6
+/- (1.13) Tiefe: 21/50 00:00:55 267mN
...
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 e5 17.Lxb5 Le7 18.Txd7 Lxg5+ 19.Dxg5 Sxd7 20.Txe5+ Kf8 21.Lxd7 h6 22.Df4+ Kg8 23.Le8 Lxg2 24.Te6 Txe8 25.Txe8+ Kh7 26.Txh8+ Dxh8 27.Dc7+ Dg7 28.Dd6 Lb7 29.Kb1 Df7 30.b3 Kg7 31.Kb2
+/- (1.18) Tiefe: 26/47 00:03:11 857mN


Analysis by Houdini 2.0c Pro x64:

14.Sf3 Lxf3 15.gxf3 Sc6 16.Kb1 f6 17.Lf4
= (0.19) Tiefe: 6/16 00:00:00 5kN
...
14.Sxe6
+/= (0.30 !) Tiefe: 22/64 00:01:05 1497mN
14.Sxe6
+/= (0.44 !) Tiefe: 22/64 00:01:09 1577mN
14.Sxe6
+/- (0.79 !) Tiefe: 22/83 00:01:21 1816mN
14.Sxe6 fxe6 15.Ld3 Le7 16.Lxe7 Dh5 17.Dxh5 gxh5 18.Ld6 Sc6 19.The1 0-0-0 20.Txe6 Sd4 21.Te7 Lxg2 22.Lxh7 Sc6 23.Tf7 Sce5 24.Tg7 Lf3 25.Tf1 Tde8 26.a4 bxa4 27.Sxa4 Lc6 28.Sc5 Sc4 29.Lf5 Sxd6 30.Lxd7+ Lxd7 31.Txd7
+- (1.97) Tiefe: 22/83 00:02:12 2960mN
...
14.Sxe6 fxe6 15.Ld3 Le7 16.Lxe7 Dh5 17.Dxh5 gxh5 18.Ld6 Sf6 19.Tde1 Kf7 20.Thf1 Sbd7 21.Se4 Lxe4 22.Lxe4 Ta7 23.Lc6 Tg8 24.b3 Tg5 25.Kb2 Tf5 26.Txf5 exf5 27.Te7+ Kg6 28.Lf4 h6 29.c4 bxc4 30.bxc4
+- (1.95) Tiefe: 23/83 00:03:42 5050mN


Analysis by Critter 1.4 64-bit SSE4:

14.Sf3 Lxf3 15.gxf3 Sc6 16.Kb1 f6 17.Lf4
= (0.11) Tiefe: 6/8 00:00:00 7kN
...
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 e5 17.Le4 h6 18.Le3 Le7 19.Dg4 Sf6 20.Lxg6+ Kf8 21.Tf1 h5 22.De6 Dxg6 23.Lc5 Sc6 24.Lxe7+
+/= (0.59 !) Tiefe: 22/58 00:03:05 2862mN
...
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 e5 17.Le4 h6 18.Le3 Le7 19.Dg4 Sf6 20.Lxg6+ Kf8 21.Tf1 h5 22.De6 Dxg6 23.Lc5 Kg7 24.Dxe7+ Df7 25.Dxe5 Te8 26.Dg3+ Kh7 27.Td6 Te6 28.Ld4 Txd6 29.Dxd6 Sbd7 30.Dc7 Dc4 31.Dxc4 bxc4 32.Lxf6 Tf8 33.Te1 Txf6 34.Te7+ Kg6 35.Txd7 Lxg2 36.Td4 Tf1+ 37.Td1 Tf6 38.Tg1 Tf2 39.Se4 Te2
+/- (1.28 !) Tiefe: 22/65 00:05:20 4840mN
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 e5 17.Le4 h6 18.Le3 Le7 19.Dg4 Sf6 20.Lxg6+ Kf8 21.Tf1 h5 22.De6 Dxg6 23.Lc5 Kg7 24.Dxe7+ Df7 25.Dxe5 Te8 26.Dg3+ Kh7 27.Td6 Te6 28.Ld4 Txd6 29.Dxd6 Sbd7 30.Lxf6 Tf8 31.Te1 Dxf6 32.Dxd7+ Tf7 33.Dd3+ Dg6 34.Se4 Kg7 35.Dd4+ Kh7 36.g3 Lxe4 37.Txe4 Tf1+ 38.Kd2 Df6 39.Dxf6 Txf6 40.Tf4 Td6+ 41.Kc3 Kg7 42.Tf1
+- (1.71 !) Tiefe: 22/65 00:06:39 6020mN


Analysis by Stockfish 2.2.2 JA SSE42:

14.Te1 Dc7 15.Dh3 e5 16.Se6 Db6 17.Sd8
+- (2.22) Tiefe: 6/8 00:00:00 19kN
...
14.Sxe6 Dxe6 15.Lxb5 axb5 16.The1 h6 17.Txe6+ fxe6 18.Sxb5 Txa2 19.Sc7+ Kf7 20.Kb1
+/- (1.11 !) Tiefe: 23/39 00:00:12 130mN
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 Se5 17.Le4 Sbc6 18.Dh3 Lc8 19.Lxc6+ Sxc6 20.Df3
+/- (1.38 !) Tiefe: 23/39 00:00:12 135mN
...
14.Sxe6 fxe6 15.Ld3 Dg7 16.The1 e5 17.Lxb5 Le7 18.Txd7 Sxd7 19.Lxd7+ Kxd7 20.Td1+ Ke8 21.Da4+ Kf7 22.Tf1+ Ke6 23.Db3+ Kd6 24.Db6+
+- (2.02 !) Tiefe: 25/51 00:00:17 190mN
14.Sxe6 f6 15.Lxf6 Sxf6 16.Te1 Lh6+ 17.Kb1
+- (2.20 !) Tiefe: 25/51 00:00:19 208mN
...
14.Sxe6 fxe6 15.Ld3 Lg7 16.The1 0-0 17.Txe5 Sxe5 18.Le4 Sbc6
+- (3.23 !) Tiefe: 32/91 00:04:02 3346mN

[Albert Silver]

Critter is a beast.

True, but I think you were very lucky to find it so quickly. Can you do it again?

I can, but probably just lucky. Note I am using 4GB hash as I had anticipated needing a couple of minutes.


Analysis by Critter 1.4 64-bit SSE4 TB:


14.Nf3 Bxf3 15.gxf3 Bg7 16.Kb1 Nc6 17.Bf4 Qf6 18.Qg3 Rc8 19.Be3 Qe5 20.f4 Qf5 21.Bd3
= (0.18 ++) Depth: 13/26 00:00:00 1390kN
14.Nf3 Bxf3 15.gxf3 Bg7 16.Kb1 Nc6 17.Bf4 Qf6 18.Qg3 h6 19.a3 Rd8 20.Bc7 0-0 21.Bxd8 Qxd8
= (0.25) Depth: 13/26 00:00:00 1542kN
14.Nf3 Bxf3 15.gxf3 Bg7 16.Kb1 Nc6 17.Bf4 Qf6 18.Qg3 h6 19.a3 Rd8 20.Bc7 0-0 21.Bxd8 Qxd8
= (0.17 --) Depth: 14/32 00:00:01 3530kN
14.Nf3 Bxf3 15.gxf3 Bg7 16.Kb1 Nc6 17.Bf4 Qf6 18.Qg3 Rc8 19.Bg5 Qe5 20.f4 Qf5 21.Bh3 Qc5 22.Ne4
= (0.13) Depth: 14/32 00:00:01 3651kN
14.Re1 Qc5 15.Bd3 Nc6 16.Nxe6 fxe6 17.Rxe6+ Kf7 18.Rf1+ Kg8 19.Be3 Qb4 20.Rf4 Qa5 21.Bxg6 hxg6 22.Rxg6+ Bg7 23.Rxg7+
+/= (0.34 ++) Depth: 14/32 00:00:01 5756kN
14.Re1 Qd6 15.Ne4 Bxe4 16.Qxe4 Ra7 17.Rd1 Be7 18.Bf4 Qb6 19.Qe3 Qc5 20.Re1 Bf6 21.Nxe6 fxe6 22.Qxc5 Nxc5 23.Bxb8 Rd7 24.Bf4
= (0.17) Depth: 14/35 00:00:01 7283kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bxd7+ Rxd7 20.Kb1 0-0 21.c3 Rc8 22.Rd1 Qd6 23.h4 Qb6 24.Ka1 Rb7
= (0.21) Depth: 15/43 00:00:02 11777kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bxd7+ Rxd7 20.Kb1 0-0 21.c3 Rc8 22.Rd1 Qd6 23.h4 Qb6 24.Ka1 Rb7
= (0.13 --) Depth: 16/43 00:00:04 35847kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bxd7+ Rxd7 20.Kb1 0-0 21.Rhf1 Rc8 22.c3 Qd6 23.Qf4 Qb6 24.Rf3 Nc6
= (0.30 ++) Depth: 16/43 00:00:04 37207kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bxd7+ Rxd7 20.c3 0-0 21.Kb1 Qc5 22.Rhf1 Rc8 23.Rf3 Qc7 24.Qf4 Nc6 25.Qxc7 Rcxc7
= (0.20) Depth: 16/43 00:00:04 37463kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bxd7+ Rxd7 20.c3 0-0 21.h4 h5 22.Kb1 Rd6 23.Rd1 Rfd8 24.Rd2 Nd7 25.Nc6
= (0.19) Depth: 17/43 00:00:05 39845kN
14.Re1 Qd6 15.Bxb5 Be7 16.Ne4 Bxe4 17.Bxe7 Qxe7 18.Qxe4 Ra7 19.Bxd7+ Rxd7 20.c3 0-0 21.h4 Rd6 22.h5 Nd7 23.hxg6 Qg5+ 24.Kb1 Qxg6 25.Qxg6+ hxg6 26.Rd1 Rd8
= (0.25) Depth: 18/43 00:00:06 57676kN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 Na6 19.Qc4 Ndc5 20.Nd6+ Bxd6 21.Rxd6 Bxg2 22.Red1 Qc7 23.Re6+ Kf8 24.Bh6+ Kg8 25.Rxa6+
= (0.28 ++) Depth: 18/43 00:00:12 110mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 Na6 19.Qc4 Ndc5 20.Nd6+ Bxd6 21.Rxd6 Bxg2 22.Red1 Qc7 23.Re6+ Kf8 24.Bh6+ Kg8 25.Rxa6+
+/= (0.36 ++) Depth: 18/43 00:00:13 122mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 Na6 19.Qc4 Ndc5 20.Nd6+ Bxd6 21.Rxd6 Bxg2 22.Red1 Qc7 23.Re6+ Kf8 24.Bh6+ Kg8 25.Rxa6+
+/= (0.49 ++) Depth: 18/43 00:00:14 136mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 Na6 19.Qc4 Ndc5 20.Nd6+ Bxd6 21.Rxd6 h6 22.Qb5+ Kf8 23.Bf6 Qh7 24.Bxe5 Rg8 25.Rf1+ Ke7 26.Rd4 Ke6 27.Qb6+ Ke7 28.Bd6+ Ke8 29.Bxc5 Nxc5 30.Qxc5 Rxa2
+/= (0.68 ++) Depth: 18/66 00:00:18 169mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 Na6 19.Qc4 Ndc5 20.Nd6+ Bxd6 21.Rxd6 h6 22.Qb5+ Kf8 23.Bf6 Qh7 24.Bxe5 Rg8 25.Rf1+ Ke7 26.Rd4 Ke6 27.Qb6+ Ke7 28.Bd6+ Ke8 29.Bxc5 Nxc5 30.Qxc5 Rxa2
+/- (0.97 ++) Depth: 18/66 00:00:27 254mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 axb5 18.Nxb5 Na6 19.Qc4 Ndc5 20.Nd6+ Bxd6 21.Rxd6 h6 22.Qb5+ Kf8 23.Bf6 Qh7 24.Bxe5 Rg8 25.Rf1+ Ke7 26.Rd4 Ke6 27.Qb6+ Ke7 28.Bd6+ Ke8 29.Bxc5 Nxc5 30.Qxc5 Rxa2
+/- (1.39 ++) Depth: 18/66 00:00:33 314mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qg3 Rhf8 25.Rxe5 Qh6+ 26.Rg5+ Kd8 27.Qd6+ Ke8 28.Bc6+ Rxc6 29.Qxc6+ Kf7 30.Qc4+ Kg7 31.h4 Rf5 32.Qc3+ Kf7 33.Qc7+ Kf6 34.Qd6+ Kg7 35.Qd7+ Rf7 36.Qd4+ Kg8 37.b3 Rf5 38.Qc4+ Kg7 39.Qc3+
+- (1.78) Depth: 18/72 00:00:45 429mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qg3 Rhf8 25.Rxe5 Qh6+ 26.Rg5+ Kd8 27.Qd6+ Ke8 28.Bc6+ Rxc6 29.Qxc6+ Kf7 30.Qc4+ Kg7 31.h4 Rf5 32.Qc3+ Kf7 33.Qc7+ Kf6 34.Qd6+ Kg7 35.Qd7+ Rf7 36.Qd4+ Kg8 37.b3 Rf5 38.Qc4+ Kg7 39.Qc3+
+- (1.67 --) Depth: 19/72 00:00:47 455mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qg3 Rhf8 25.Rxe5 Qh6+ 26.Rg5+ Kd8 27.Qd6+ Ke8 28.Bc6+ Rxc6 29.Qxc6+ Kf7 30.Qc4+ Kg7 31.h4 Rf5 32.Qc3+ Kf7 33.Qc7+ Kf6 34.Qd6+ Kg7 35.Qd7+ Rf7 36.Qd4+ Kg8 37.b3 Rf5 38.Qc4+ Kg7 39.Qc3+
+/- (1.57 --) Depth: 19/72 00:00:49 467mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.Qg3 Rhf8 25.Rxe5 Qh6+ 26.Rg5+ Kd8 27.Qd6+ Ke8 28.Bc6+ Rxc6 29.Qxc6+ Kf7 30.Qc4+ Kg7 31.h4 Rf5 32.Qc3+ Kf7 33.Qc7+ Kf6 34.Qd6+ Kg7 35.Qd7+ Rf7 36.Qd4+ Kg8 37.b3 Rf5 38.Qc4+ Kg7 39.Qc3+
+/- (1.40 --) Depth: 19/72 00:00:50 488mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.a4 Rhd8 25.Qe3 Kd6 26.c4 Ke7 27.Qa7+ Rd7 28.Qxa6 Rb8 29.Qe6+ Kd8 30.Kc2 Qe7 31.Qxe5 Qxe5 32.Rxe5 Ra7 33.b3 Kd7 34.Kc3 Rf8 35.Re1 Ra5 36.Kb4
+- (1.70) Depth: 19/74 00:01:06 636mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.a4 Rhd8 25.Qe3 Kd6 26.c4 Ke7 27.Qa7+ Rd7 28.Qxa6 Rb8 29.Qe6+ Kd8 30.Kc2 Qe7 31.Qxe5 Qxe5 32.Rxe5 Ra7 33.b3 Kd7 34.Kc3 Rf8 35.Re1 Ra5 36.Kb4
+- (1.70) Depth: 20/74 00:01:16 741mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.a4 Rhd8 25.Qe3 Kd6 26.c4 Ke7 27.Qa7+ Rd7 28.Qxa6 Rb8 29.Qe6+ Kd8 30.Kc2 Qe7 31.Qxe5 Qxe5 32.Rxe5 Ra7 33.b3 Kd7 34.Kc3 Rf8 35.Re1 Ra5 36.Kb4
+- (1.70) Depth: 21/74 00:01:38 977mN
14.Nxe6 fxe6 15.Bd3 Qg7 16.Rhe1 e5 17.Bxb5 Be7 18.Rxd7 Nxd7 19.Bxd7+ Kd8 20.Be6 Bxg5+ 21.Qxg5+ Kc7 22.Nd5+ Bxd5 23.Bxd5 Rac8 24.a4 Rhd8 25.Qe3 Kd6 26.c4 Ke7 27.Qa7+ Rd7 28.Qxa6 Rb8 29.Qe6+ Kd8 30.Kc2 Qe7 31.Qxe5 Qxe5 32.Rxe5 Ra7 33.b3 Kd7 34.Kc3 Rf8 35.Re1 Ra5 36.Kb4
+- (1.70) Depth: 22/74 00:02:36 1604mN

[Dr.Wael Deeb]

Very nice find!

What find

It's a combinational move against an already lost black position....

I define a "find" when you discover a new move in an already established opening line which improves the chances of one of the two armies....

In an already destroyed position is not a novelty,it's a winning move
Dr.D

[AdminX]

Very nice find!

What find

It's a combinational move against an already lost black position....

I define a "find" when you discover a new move in an already established opening line which improves the chances of one of the two armies....

In an already destroyed position is not a novelty,it's a winning move
Dr.D

That the position is lost we can both agree, but that move proves it beyond any doubt.

[Dr.Wael Deeb]

Very nice find!

What find

It's a combinational move against an already lost black position....

I define a "find" when you discover a new move in an already established opening line which improves the chances of one of the two armies....

In an already destroyed position is not a novelty,it's a winning move
Dr.D

That the position is lost we can both agree, but that move proves it beyond any doubt.

Indeed

But yet again,the thread title is a little bit misleading as it gives you the impression that a novelty was found with Stockfish while building an opening book....
Dr.D

[acase]

Very nice find!

What find

It's a combinational move against an already lost black position....

I define a "find" when you discover a new move in an already established opening line which improves the chances of one of the two armies....

In an already destroyed position is not a novelty,it's a winning move
Dr.D

That the position is lost we can both agree, but that move proves it beyond any doubt.

Indeed

But yet again,the thread title is a little bit misleading as it gives you the impression that a novelty was found with Stockfish while building an opening book....
Dr.D

Greetings Doc,

There is nothing misleading about the title of the thread as a cook has been found by Stockfish in a book line which albiet is rarely played, and wasn't necessarily known as lost until the cook was found. In fact out of all the databases I have there are six games in which the line was played up to move 14. with three wins for white and three wins for black.

I'm thinking that perhaps you may have mistakenly associated the words "cooking the opening book" with building an opening book.


Andrew R. Case

[Don]

Very nice find!

What find

It's a combinational move against an already lost black position....

I define a "find" when you discover a new move in an already established opening line which improves the chances of one of the two armies....

In an already destroyed position is not a novelty,it's a winning move
Dr.D

Is this position a loss for black if white does not play Nxe6? The answer to whether this is a real find hinges on that in my opinion. If Nxe6 is just another way to win then it's not that interesting.

What would make it a find is if there is no other clear win and the fact that Nxe6 had not been discovered.