Tactical mistake by Stockfish (Grischuk-Ding at candidates)

[MikeB]

my private and not yet released fork of SF, single thread

Code: Select all

 34	+0.06?	168.9M	1:33.45	a4 Nf4?
 33	+0.14!	132.8M	1:13.42	a4!
 33	+0.06?	128.0M	1:10.83	a4 Nf4?
 32	+0.14 	101.3M	0:56.21	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 c3 b4 Be3 Kh8 h5 Qxh5 Nh4 Qxd1 Nxg6+ fxg6 Rxd1 Rd8 Bc5 bxc3 bxc3 g5 Ra1 Bb7 Bxe7 Nxe7 Nc5 Bf3 Ra7 Nd5 Ne6 Rc8
 32	+0.17!	99.8M  	0:55.39	a4!
 32	+0.09?	92.4M  	0:51.26	a4 Nf4?
 31	+0.17 	81.7M  	0:45.42	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 c3 b4 Be3 Kh8 h5 Qxh5 Nh4 Qxd1 Nxg6+ fxg6 Rxd1 bxc3 bxc3 g5 Nc5 Na5 Bc2 Bf3 Ra1 Nc6 Ne6 Rc8 Bb3 Nd8 Nc5
 31	+0.10?	74.3M  	0:41.30	a4 Nf4?
 31	+0.18?	69.3M  	0:38.60	a4 Nf4?
 30	+0.26 	57.7M  	0:32.14	a4 Nf4 Ne4 Ng6 h4 Qg4 Bg5 Bxg5 hxg5 Na5 Nfd2 Qf5 Qf3 Qxf3 Nxf3 Nxb3 cxb3 Bd5 Rac1 c6 d4 Bxb3 Nxe5 Nxe5 dxe5 Bd5 a5 Rad8 f3 Bxe4 Rxe4
 30	+0.25!	52.1M  	0:29.03	a4!
 29	+0.16 	47.4M  	0:26.48	a4 Nf4 Ne4 Ng6 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 Qxd3 Re3 Qd1+ Kh2 f6 Qg6 Qd7 Rd3 Qf7 Qxf7+ Rxf7 axb5 axb5 Rxa8+ Bxa8 f3 Bb7 Be3 Re7 Bc5 Rf7 Rd8+ Kh7
 28	+0.11 	39.9M  	0:22.27	a4 Nf4 Ne4 Ng6 c3 h6 Be3 Rad8 axb5 axb5 Bc5 Ba8 Qd2 Qxd3 Qxd3 Rxd3 Bxe7 Ncxe7 Ra5 Bc6 Ra7 Rd7 Nc5 Rd6 Nxe5 Nxe5 Rxe5 Ng6 Re1 Nf4
 28	+0.13!	39.0M  	0:21.76	a4!
 28	+0.03?	35.9M  	0:20.03	a4 Nf4?
 28	+0.16?	34.0M  	0:18.98	a4 Nf4?
 28	+0.24?	32.0M  	0:17.92	a4 Nf4?
 27	+0.32 	28.2M  	0:15.80	a4 Nf4 Ne4 Ng6 c3 h6 Be3 Na5 Ba2 Bd5 c4 Be6 Bc5 bxc4 dxc4 Rfd8 Qxd7 Rxd7 Bxe7 Rxe7 Nc5 Bxc4 Bb1 Nb3 Nxb3 Bxb3 Bxg6 fxg6 Nxe5 a5 Nxg6 Rxe1+ Rxe1
 27	+0.26!	26.7M  	0:14.95	a4!
 27	+0.18!	24.5M  	0:13.74	a4!
 26	+0.10 	22.7M  	0:12.69	a4 Nf4 Ne4 Ng6 c3 h6 Be3 Rad8 axb5 axb5 Bc5 Nf4 d4 exd4 cxd4 Bc8 Rc1 Bxc5 Rxc5 Nxd4 Nxd4 Qxd4 Qxd4 Rxd4 Rxc7 Rd7 Rxd7 Bxd7 Ng3 Nd3
 26	+0.26!	21.7M  	0:12.16	a4!
 26	+0.18!	21.4M  	0:11.97	a4!
 25	+0.10 	18.9M  	0:10.57	Ne4 Rad8 a4 b4 Ng3 Bc5 Nxe5 Nxe5 Rxe5 Bd4 Re1 c5 Qg4 f5 Qd1 Kh8 Ne2 Bf6 Bxd5 Bxd5 Nf4 Ba8 Ne6 Qc6 Qf3 Qxf3
 25	+0.24!	18.2M  	0:10.16	Ne4!
 25	+0.15!	16.1M  	0:09.02	a4!
 24	+0.07 	13.2M  	0:07.37	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Ng3 Kh8 c3 h6 d4 exd4 Qd3 Bd6 Qxb5 dxc3 bxc3 Nce5 Qxd7 Nxd7 Ne4 Be7 Bc2
 24	+0.16!	13.0M  	0:07.29	a4!
 24	+0.08?	12.2M  	0:06.82	Ne4 Rad8?
 23	+0.16 	10.7M  	0:05.97	Ne4 Kh8 a4 b4 Ng3 Bf6 Bd2 Rad8 Nh5 Rde8 Qe2 Rg8 Qe4 Na5 Qg4 Qxg4 hxg4 Nxb3 cxb3 h6 a5 c5 g5 hxg5
 23	+0.18!	10.5M  	0:05.89	Ne4!
 23	+0.03?	10.1M  	0:05.62	Ne4 Kh8?
 23	+0.20!	9.63M  	0:05.38	Ne4!
 23	+0.12?	8.55M  	0:04.77	a4 Nf4?
 22	+0.20 	7.18M  	0:04.00	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Qe2 h6 Ng3 Na5 Ba2 Nc6 c3 Bd6 h4 Nce7 h5 Nf4 Bxf4 exf4 Ne4 Nd5 Nxd6
 22	+0.12!	6.83M  	0:03.81	a4!
 22	+0.01?	6.37M  	0:03.55	a4 Nf4?
 21	+0.30 	3.91M  	0:02.18	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 c3 Na5 Bc2 c5 Qe2 Bd5 Be3 Rc8 Ra1 Nb3 Bxb3 Bxb3 h4 Qg4 Ng3 Nxh4 Nxe5 Qxe2
 20	+0.67 	1.55M  	0:00.86	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 c3 Qxd3 Qxd3 Rxd3 Bc2 Rd7 axb5 axb5 Ne5 Nxe5 Rxe5
 19	+0.51 	1.06M  	0:00.59	Nf1 Bf6 Ng3 Rae8 a4 b4 Bd2 Kh8 c3 Rd8 a5 bxc3 bxc3 Nf4 Bxf4 exf4 Ne4 Qxd3 Nxf6 gxf6 Qc1 Qf5
 18	+0.70 	349048	0:00.20	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 axb5 axb5 Be3 h6 c3 Qxd3 Qxd3 Rxd3 Bc2 Rdd8 Bxg6 fxg6
 17	+0.60 	292841	0:00.17	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 axb5 axb5 Be3 h6 c3 Qxd3 Qxd3 Rxd3 Bc2 Rdd8 Bxg6 fxg6
 16	+0.68 	203049	0:00.11	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 c3 Rad8 a4 Qxd3 Qxd3 Rxd3 Bc2 Rd7 axb5 Bxf3 gxf3 axb5
 15	+0.62 	142090	0:00.08	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rae8 d4 Bxf3 Qxf3 Qxd4 c3 Qf6 Qxf6 Bxf6 Rxe8 Rxe8 Be3
 14	+0.98 	79346  	0:00.05	Nxe5 Nxe5 Rxe5 Bf6 Re1 Nf4 Ne4 Nxh3+ Kf1 Bd4 Qh5 Bxe4 Rxe4 Nxf2
 13	+0.61 	57271  	0:00.03	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re3 c5 Qe1 Bf6 a4 Nf4 axb5 axb5 Rxa8 Rxa8
 12	+1.11 	37161  	0:00.02	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 Be3 Bd6
 11	+0.83 	28503  	0:00.02	Nxe5 Nxe5 Rxe5 Rad8 Qf3 Bf6 Re1 c5 Ne4 Bd4 Qg3
 10	+1.24 	16520  	0:00.01	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Nxh3+ gxh3 Qxh3
  9	+1.21 	5138    	0:00.01	Nxe5 Nxe5 Rxe5 Bf6 Re1 Rae8 Rxe8 Qxe8
  8	+1.09 	3584    	0:00.00	Nxe5 Nxe5 Rxe5 Bf6 Re1 Rae8 Ne4 Bd4 a3
  7	+2.57 	1987    	0:00.00	Rxe5 Ndb4 Re2
  6	+1.58 	1509    	0:00.00	Rxe5 Ncb4 d4 Nf4
  5	+1.25 	556      	0:00.00	a4
  4	+0.38 	361      	0:00.00	a4 Nd4 axb5 Nxf3+ Nxf3 axb5
  3	+0.28 	143      	0:00.00	a3 a5 c3
  2	+1.72 	79        	0:00.00	a3 b4
  1	+0.26 	34        	0:00.00	c3

[Milos]

While commenting a game from yesterday at candidates, Yannick Gozzoli pointed that 12.Nxe5 is a mistake because 12. Nxe5 Nxe5 13. Rxe5 Nf4!! 14. Nf3 Nxg2!! :

[pgn][Event "FIDE Candidates 2020"]
[Site "Yekaterinburg RUS"]
[Date "2020.03.22"]
[Round "5.2"]
[White "Grischuk, Alexander"]
[Black "Ding, Liren"]
[Result "1/2-1/2"]
[WhiteTitle "GM"]
[BlackTitle "GM"]
[WhiteElo "2777"]
[BlackElo "2805"]
[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, 7...O-O"]
[WhiteFideId "4126025"]
[BlackFideId "8603677"]
[EventDate "2020.03.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. h3
Bb7 9. d3 d5 10. exd5 Nxd5 11. Nbd2 Qd7 12. a4 f6 13. Ne4 Na5 14. Ba2 c5 15. Be3
Rfc8 16. axb5 axb5 17. Nxc5 Rxc5 18. b4 Rcc8 19. bxa5 Kh8 20. Bd2 Nb4 21. Bb3
Bd5 22. Bxd5 Qxd5 23. Rc1 Nc6 24. c4 bxc4 25. Rxc4 Nxa5 26. Rxc8+ Rxc8 27. d4
Nc6 28. dxe5 Nxe5 29. Nxe5 fxe5 30. Qg4 Rd8 31. Be3 Bf6 32. Rc1 Qd7 33. Qh5 Qe8
34. Qf3 Rc8 35. Rd1 Rd8 36. Rc1 Rc8 37. Rb1 Rb8 38. Re1 Qg6 39. Ba7 Rc8 40. Qb7
Qc2 41. Be3 Qc6 42. Qb4 h5 43. Bc1 Qc2 44. Be3 Rd8 45. Qb1 Qxb1 46. Rxb1 Kh7 47.
g4 hxg4 48. hxg4 Rd6 49. Kg2 Kg6 50. Kf3 Bg5 51. Ke4 Bxe3 52. fxe3 Re6 53. Rb7
Re8 54. Ra7 1/2-1/2[/pgn]

[d]r4rk1/1bpqbppp/p1n5/1p1np3/8/1B1P1N1P/PPPN1PP1/R1BQR1K1 w - - 2 12

But even after 1 billions nodes Stockfish still thinks that 12.Nxe5?? is good for white
Not every run but very often, Stockfish can't refute 12.Nxe5??

Code: Select all

Stockfish_20032021_x64_modern:
...
 22/43	00:04	 29 900 094	7 357 306	+0,24	12.Ne4 Rad8 13.Ng3 f6 14.c3 Na5 15.Bc2 c5 16.a4 b4 17.d4 bxc3 18.dxe5 Qc7 19.Qd3 g6 20.Nf5 Nb4 21.Nxe7+ Qxe7 22.Qxc3 Bxf3 23.gxf3 Nxc2 24.Qxc2 fxe5 25.f4 Nc6 26.Ra3 Nd4 27.Qc4+ Qe6 28.Qxe6+ Nxe6 29.fxe5
 23/39-	00:04	 36 447 770	7 335 031	+0,15	12.Ne4 Kh8
 23/39+	00:05	 38 062 850	7 321 186	+0,24	12.Ne4
 23/39	00:05	 39 568 235	7 315 258	+0,25	12.Ne4 Kh8 13.a4 b4 14.d4 exd4 15.a5 Rae8 16.Qd3 Nf6 17.Bd2 h6 18.Ba4 Rd8 19.Ng3 Rfe8 20.Ne5 Qd5 21.Nxc6 Bxc6 22.Bxc6 Qxc6 23.Nf5 Qc5 24.Nxe7 Rxe7 25.Rxe7 Qxe7
 24/27-	00:05	 40 345 966	7 314 352	+0,15	12.Ne4 Kh8
 24/32+	00:05	 41 099 153	7 315 619	+0,25	12.Ne4
 24/37	00:06	 44 490 985	7 317 596	+0,33	12.Ne4 Kh8 13.a4 b4 14.a5 Rad8 15.Ba4 f6 16.c4 bxc3 17.bxc3 Qc8 18.d4 exd4 19.cxd4 Nxa5 20.Qc2 Bb4 21.Bd2 Bxd2 22.Nexd2 Nb4 23.Qc3 Nac6 24.Bb3 a5
 25/16-	00:06	 49 225 042	7 285 043	+0,23	12.Ne4 Kh8
 25/20-	00:07	 57 592 222	7 243 393	+0,13	12.Ne4 Kh8
 25/36+	00:08	 59 407 443	7 245 693	+0,23	12.Ne4
 25/39	00:08	 60 222 963	7 240 947	+0,32	12.Ne4 Kh8 13.Ng3 Nf4 14.Bxf4 exf4 15.Ne4 Nd4 16.Nxd4 Qxd4 17.c3 Qd8 18.Nd2 Qd6 19.Qh5 g6 20.Qh6 c5 21.Ne4 Qc7 22.d4 cxd4 23.cxd4 Rad8 24.Rad1 Bd5 25.Bxd5
 26/39-	00:09	 66 645 571	7 275 717	+0,22	12.Ne4 Kh8
 26/39-	00:10	 79 762 859	7 290 937	+0,12	12.Ne4 Kh8
 26/40+	00:11	 84 492 241	7 302 069	+0,22	12.Ne4
 26/44	00:11	 85 832 402	7 303 642	+0,16	12.Ne4 Kh8 13.Ng3 Nf4 14.Bxf4 exf4 15.Ne4 Nd4 16.Nxd4 Qxd4 17.c3 Qd8 18.Nd2 Qd6 19.d4 c5 20.Qe2 Rae8 21.Nf3 Qf6 22.Rad1 Bc6 23.Bc2 Bd6 24.Ne5 Bxe5 25.dxe5 Qg5 26.Qg4 Qxg4 27.hxg4
 27/39-	00:14	 109 324 721	7 295 610	+0,06	12.Ne4 Kh8
 27/40+	00:15	 112 256 786	7 300 304	+0,16	12.Ne4
 27/41	00:16	 119 299 533	7 294 822	+0,13	12.Ne4 Kh8 13.Ng3 Nf4 14.Bxf4 exf4 15.Ne4 Nd4 16.Nxd4 Qxd4 17.c3 Qd8 18.Nd2 Qd6 19.a4 c5 20.axb5 axb5 21.Rxa8 Bxa8 22.Qe2 Qg6 23.Qg4 Bf6 24.Qxg6 fxg6 25.Ne4 Bxe4 26.dxe4 Be5 27.Rd1 g5 28.Be6 g6 29.Bd7 b4 30.cxb4
 28/47+	00:17	 124 508 400	7 295 699	+0,23	12.Ne4
 28/47+	00:17	 127 982 320	7 294 518	+0,32	12.Ne4
 28/47	00:20	 148 747 985	7 289 781	+0,17	12.Ne4 Rad8 13.a4 b4 14.Ng3 f6 15.d4 Nxd4 16.Nxd4 exd4 17.Qxd4 Kh8 18.Ne4 Rfe8 19.Bd2 Qc6 20.Qc4 Qxc4 21.Bxc4 a5 22.Bb5 Rf8 23.c4 bxc3 24.bxc3 Nb6 25.Rab1 Bd5 26.Ng3 Nc4 27.Rxe7
 29/39-	00:26	 193 100 065	7 306 370	+0,07	12.Ne4 Kh8
 29/43+	00:26	 195 524 096	7 304 396	+0,17	12.Ne4
 29/43	00:30	 222 090 245	7 306 080	+0,06	12.Ne4 Kh8 13.a4 b4 14.a5 Rad8 15.Ba4 f6 16.c4 bxc3 17.bxc3 Qc8 18.Bd2 Nxa5 19.Bc2 Nc6 20.Ng3 f5 21.Bb3 f4 22.Ne4 Qf5 23.Bc2 Nb6 24.Kh2 Qh5 25.Qb1 Rb8 26.d4 Nd5 27.Qa2 exd4 28.cxd4
 30/47+	00:40	 298 154 489	7 294 656	+0,15	12.Nxe5
 30/47+	00:41	 303 526 743	7 299 298	+0,25	12.Nxe5
 30/49	00:41	 306 422 307	7 300 462	+0,18	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Bxe4 16.dxe4 Qxd1 17.Rxd1 Bc5 18.Bd2 Rxe4 19.Kf1 Re7 20.Bg5 Rfe8 21.Bxf6 gxf6 22.Rd5 Bd6 23.Rad1 Rb8 24.Rf5 Kg7 25.c3 Rbe8 26.a4 bxa4 27.Bxa4 Rb8 28.b3 h6 29.Rf3 Be5
 31/49-	00:51	 370 967 343	7 259 492	+0,08	12.Nxe5 Nxe5
 31/49	00:51	 376 630 255	7 262 162	+0,12	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bd6 19.a4 Rb8 20.a5 Rfe8 21.Rd2 h6 22.c3 Re7 23.Rad1 Bc6 24.Bd5 Bxd5 25.Rxd5 Rbe8 26.Kf1 Re6 27.b4 Kh7 28.Bc5 Be5 29.Bd4 Bd6 30.Be3 Be5 31.R5d3 f5 32.Kg1 f4 33.Bc5
 32/52+	00:53	 388 302 935	7 247 702	+0,22	12.Nxe5
 32/52	00:54	 390 817 599	7 229 731	+0,15	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bd6 19.a4 Rb8 20.a5 Rfe8 21.Rd2 h6 22.c3 Re7 23.Rad1 Bc6 24.Bd5 Bxd5 25.Rxd5 Rbe8 26.Kf1 Re6 27.b4 f6 28.Bc5 Be5 29.Bd4 Bd6 30.Be3 Be5 31.Rc5 R8e7 32.c4 Bd6 33.Rc6 Bxb4 34.cxb5 Rxc6 35.bxc6
 33/54+	01:04	 465 143 116	7 227 208	+0,24	12.Ne4
 33/54	01:09	 500 498 476	7 225 953	+0,21	12.Ne4 Kh8 13.a4 b4 14.a5 Rad8 15.Ba4 f6 16.d4 Qc8 17.c4 bxc3 18.bxc3 exd4 19.cxd4 Nxa5 20.Qe2 Bb4 21.Bd2 Bxd2 22.Qxd2 Nc4 23.Qc1 Ndb6 24.Bb3 Bd5 25.Nc5 Bxf3 26.Bxc4 Nxc4 27.Qxc4 Bd5 28.Qd3 Rfe8 29.Rxe8+ Rxe8 30.Nxa6 Qd7 31.Nb4 Qd6 32.Qd2 Qd7
 34/46+	01:13	 531 642 073	7 235 489	+0,31	12.Ne4
 34/50	01:20	 582 949 316	7 262 989	+0,14	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Bc6 20.cxb5 axb5 21.a4 c4 22.axb5 Bxb5 23.Ba4 Bxa4 24.Rxa4 Rb8 25.Rd7 Bf6 26.Rxc4 Bxb2 27.g3 Rfd8 28.Rxd8+ Rxd8 29.Kh2 Bf6 30.Kg2 Be5 31.f4 Bd6 32.Rc6
 35/62+	01:26	 626 446 197	7 284 258	+0,24	12.Nxe5
 35/62+	01:27	 635 006 411	7 295 569	+0,34	12.Nxe5
 35/62	01:31	 668 111 798	7 315 760	+0,25	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bg6 19.c3 Rd8 20.Bd5 h6 21.Bc6 f6 22.Bf4 Rxd1+ 23.Rxd1 Rd8 24.Rxd8+ Bxd8 25.f3 Bf7 26.b3 Be6 27.Bg3 Kf7 28.Bb7 a5 29.Bc6 a4 30.Bxb5 axb3 31.axb3 Bxb3 32.Kf2 g5 33.Ke3
 36/55-	01:37	 705 995 145	7 277 100	+0,15	12.Nxe5 Nxe5
 36/60+	01:38	 717 971 463	7 260 671	+0,25	12.Nxe5
 36/60	01:42	 740 053 972	7 239 320	+0,13	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rac1 Rxd1+ 21.Rxd1 Rb8 22.Bf4 Rb7 23.Bd6 Bf8 24.Be5 Be7 25.a4 bxc4 26.Bxc4 Bc2 27.Re1 Bxa4 28.Bxa6 Ra7 29.Bc4 Bc6 30.f3 Kf8 31.b3 Be8 32.Kf2 f6 33.Bc3 Bf7 34.Re2 Rb7 35.Bxf7 Kxf7
 37/55+	01:47	 774 052 922	7 224 282	+0,23	12.Nxe5
 37/56+	01:49	 791 599 904	7 214 793	+0,32	12.Nxe5
 37/56	01:51	 805 595 230	7 207 035	+0,36	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rac1 Rxd1+ 21.Rxd1 Rb8 22.Bf4 Rb7 23.Bd6 Bf8 24.Be5 Be7 25.a4 Kf8 26.axb5 f6 27.Bc3 axb5 28.cxb5 Rxb5 29.Bc4 Rb8 30.f3 Bg6 31.Kf2 Rd8 32.Rxd8+ Bxd8 33.Ke2 Be7 34.g4 Bd6 35.Ke3 Ke7
 38/57-	02:15	 970 889 886	7 150 515	+0,26	12.Nxe5 Nxe5
 38/57-	02:25	1 039 595 084	7 156 640	+0,16	12.Nxe5 Nxe5
 38/57	02:39	1 141 285 295	7 166 446	+0,13	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rdc1 Rc8 21.Bc2 Bxc2 22.Rxc2 Rfd8 23.cxb5 axb5 24.a4 bxa4 25.Rxa4 Rb8 26.g3 Bf6 27.Rxc5 Bxb2 28.Kg2 g6 29.Ra7 Ra8 30.Rxa8 Rxa8 31.Kf3 Kg7 32.g4 Rd8 33.Rb5 Bf6 34.g5
 39/61	02:51	1 242 881 798	7 228 284	+0,13	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rac1 Rxd1+ 21.Rxd1 Rb8 22.Rd7 Rb7 23.Rd2 h6 24.a4 Bc6 25.cxb5 axb5 26.axb5 Rxb5 27.Ba4 Rb6 28.Bxc6 Rxc6 29.g4 c4 30.Rc2 Bf6 31.b4 c3 32.b5 Rd6 33.f3 Rd1+ 34.Kf2 Rb1 35.b6 Rb2 36.Re2 Rb1 37.Kg2 Rb2
 40/56+	02:53	1 255 863 301	7 233 610	+0,23	12.Nxe5

I don't know what is the problem with your SF, but mine latest SF version takes only 4s and depth of 23 to discard Nxe5 and then sticks to a4.

Code: Select all

FEN: r4rk1/1bpqbppp/p1n5/1p1np3/8/1B1P1N1P/PPPN1PP1/R1BQR1K1 w - - 2 12

Stockfish 240321:
NNUE evaluation using nn-62ef826d1a6d.nnue enabled
 1/1	00:00	 551	276k	+0.26	c3
 2/2	00:00	 1k	679k	+1.75	a3 b4
 3/3	00:00	 2k	1'196k	+0.27	a3 a5 c3
 4/4	00:00	 3k	1'663k	+0.74	Nxe5 Nxe5 Rxe5
 5/5	00:00	 7k	3'511k	+0.19	Nxe5 Nxe5 Rxe5 Nf4 Ne4
 6/6	00:00	 8k	2'763k	+1.05	Nxe5 Nxe5 Rxe5 Nf4
 7/7	00:00	 23k	5'658k	+0.20	a4 Rad8 axb5 axb5 Nxe5 Nxe5 Rxe5
 8/8	00:00	 25k	5'028k	+0.29	Nxe5 Nxe5 Rxe5 Bf6 Re4 Rad8 Nf3
 9/12	00:00	 34k	5'729k	+0.73	a4 Rad8 axb5 axb5 Nxe5 Nxe5
 10/11	00:00	 62k	6'906k	+0.67	Nxe5 Nxe5 Rxe5 c5 Nf3 Rae8 Re1
 11/14	00:00	 133k	7'399k	+0.75	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 Be3 Rfe8 a4 Bf6 axb5 axb5
 12/19	00:00	 237k	7'659k	+0.74	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rad8 a4 c5 Be3 Rfe8 axb5 axb5
 13/18	00:00	 284k	7'882k	+0.72	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 c3 Qxd3 Qxd3 Rxd3 axb5 axb5 Bc2 Rd7
 14/22	00:00	 384k	7'999k	+0.71	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rae8 Be3 c5 a4 h6 c3 Bd6 d4 c4 axb5 axb5 Bc2
 15/24	00:00	 748k	8'046k	+0.76	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rae8 Be3 h6 axb5 axb5 c3 Bd6 Bc2
 16/25	00:00	 966k	8'187k	+0.70	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rae8 c3 c5 Be3 Bd6 a4 h6 axb5 axb5 Bc2 Nf4 Bxf4 Rxe1+ Nxe1 Bxf4 d4 c4
 17/35	00:00	 1'732k	8'056k	+0.78	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 c5 Be3 Rac8 a4 h6 Ne5 Nxe5 Rxe5 Bd6 Rh5 Rfe8 Qg4 Qxg4
 18/31	00:00	 6'255k	7'848k	+0.66	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 Rad8 Be3 c5 Bxc5 Bxc5 Rxc5 Nf4 Rg5 Qe7 Qd2 Qf6 Rg3 Nh5 Rg4 Bxf3 gxf3 Qxb2 Re1 Rfe8 Rxe8+ Rxe8 Qg5 Qf6 Qxf6 Nxf6
 19/34	00:00	 7'676k	7'817k	+0.48	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rae8 axb5 axb5 c4 Bf6 Rxe8 Qxe8 Be3 Qc6 cxb5 Qxb5 Bc4 Qxb2 Ra5 Bxf3 Qxf3 Ne5 Qd5 Nxc4 dxc4
 20/34	00:01	 10'318k	7'764k	+0.43	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 c3 Rae8 Be3 h6 d4 c4 Bc2 Bd6 a4 b4 Bxg6 fxg6 Ne5 Bxe5 dxe5 Qc6 f3 bxc3 bxc3 Rxe5 Bd4 Rxe1+ Qxe1 Re8
 21/32	00:01	 11'624k	7'759k	+0.37	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 c5 c3 Rad8 d4 c4 Bc2 f5 Be3 Rde8 Ne5 Qd5 Qf3 Qxf3 Nxf3 Bxf3 gxf3 Nh4 Rd1 Nxf3+ Kf1
 22/34	00:01	 13'530k	7'767k	+0.62	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 Rad8 Be3 c5 c3 Qc7 d4 Bd6 a4 Rfe8 axb5 axb5 Rg5 c4 Bc2 b4 Rb5 Qc6
 23/35-	00:03	 26'721k	7'589k	+0.09	Nxe5 Nxe5
 23/35	00:04	 35'815k	7'487k	+0.13	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 c3 Na5 Bc2 c5 Be3 Qd5 d4 exd4 cxd4 cxd4 Bxd4 Bb4 Bc3 Bxc3 Nxc3 Qxd1 Bxd1 Rd8 Be2
 24/35+	00:05	 39'752k	7'464k	+0.21	a4
 24/37	00:05	 43'757k	7'456k	+0.06	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 c3 h6 Ng3 Rd8 Bc2 b4 Qe2 Qd5 Nf5 Bf8 Ne3 Nf4 Nxd5 Nxe2+ Rxe2 Rxd5 Re1 Ra5 Bd2 Ra2
 25/47+	00:06	 49'530k	7'438k	+0.14	a4
 25/47+	00:06	 50'385k	7'436k	+0.22	a4
 25/47	00:07	 54'351k	7'412k	+0.21	a4 Nf4 Ne4 Ng6 Be3 h6 Nfd2 Nd4 Bxd4 exd4 axb5 axb5 Rxa8 Bxa8 Qh5 Nf4 Qg4 Qxg4 hxg4 Bb4 g3 Nh3+ Kf1 Ng5 Ra1 Bc6 Ra7 Ra8
 26/33-	00:07	 58'693k	7'404k	+0.13	a4 Nf4
 26/38-	00:08	 64'050k	7'407k	+0.05	a4 Nf4
 26/38+	00:09	 71'365k	7'401k	+0.13	a4
 26/38	00:10	 77'026k	7'404k	+0.24	a4 Nf4 Ne4 Ng6 Be3 h6 c3 Na5 Ba2 Bd5 Bxd5 Qxd5 b4 Nb7 Ng3 c5 Nf5 cxb4 Nxe7+ Nxe7 cxb4 f6 Nh4 Qd7 axb5 axb5 Rxa8 Rxa8 Qc2
 27/22-	00:10	 77'831k	7'405k	+0.16	a4 Nf4
 27/33	00:11	 83'554k	7'397k	+0.11	a4 Nf4 Ne4 Ng6 Be3 h6 Nc5 Bxc5 Bxc5 Rfe8 Nd2 Nf4 Qg4 Qxg4 hxg4 Na5 f3 Nxb3 Nxb3 f6 Na5 Bc8 d4 Ne6 Nb3 bxa4 Rxa4 Bd7 Rc4 Bb5 Rc3
 28/40+	00:12	 91'081k	7'363k	+0.19	a4
 28/41	00:12	 93'536k	7'351k	+0.22	a4 Nf4 Ne4 Ng6 Be3 h6 Nc5 Bxc5 Bxc5 Rfe8 Nd2 Na5 Ba2 Nf4 Ne4 Bxe4 dxe4 Qc6 Be3 Nc4 axb5 axb5 Bxc4 Qxc4 Rxa8 Rxa8 Bxf4 exf4 e5 b4 Qg4 Qxc2 Qxf4 b3 Qd4
 29/36-	00:13	 97'769k	7'328k	+0.13	a4 Nf4
 29/39-	00:14	 108'595k	7'325k	+0.05	a4 Nf4
 29/39+	00:15	 110'503k	7'324k	+0.13	a4
 29/41	00:17	 124'907k	7'324k	 0.00	a4 Nf4 Ne4 Ng6 Be3 h6 c3 Na5 Ba2 bxa4 h4 Bd6 Nfd2 Nxh4 Qh5 Be7 Qxe5 Qg4 g3 Qh3 gxh4 Bd6 Qxa5 Bh2+ Kh1 Bf4+ Kg1
 30/45+	00:17	 129'260k	7'332k	+0.08	a4
 30/45	00:18	 135'301k	7'348k	+0.09	a4 Nf4 Ne4 Ng6 Be3 h6 Nc5 Bxc5 Bxc5 Rfe8 Nd2 Na5 Qg4 Qxg4 hxg4 Nxb3 Nxb3 Bc6 axb5 axb5 Be3 Ra4 f3 Rea8 Rxa4 Rxa4 Nc5 Ra2 Rb1 Kh7 Kf2 Bd5 Ne4 b4 Nc5
 31/41+	00:19	 145'916k	7'355k	+0.17	a4
 31/44-	00:27	 199'196k	7'353k	 0.00	a4 Nf4
 31/44+	00:28	 209'320k	7'353k	+0.12	a4
 31/44	00:28	 211'673k	7'353k	+0.15	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 c3 b4 Be3 Nf4 Nxe5 Nh3+ Kh2 Qxd1 Rxd1 Nxe5 Kxh3 Rb8 Bc2 Bc6 Ra1 bxc3 bxc3 Bd7+ Kg2 Rb2 Ra5 Bd6 d4 Rxc2
 32/47-	00:30	 224'794k	7'346k	+0.07	a4 Nf4
 32/47+	00:31	 228'263k	7'346k	+0.15	a4
 32/47	00:31	 233'669k	7'347k	+0.14	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 Na5 Ba2 h6 Nfd2 Qxd1 Rxd1 Rd8 Re1 Nc6 h5 Nf8 Nf3 Nd7 g4 Nf6 g5 Nxe4 dxe4 hxg5 Nxg5 Rf8 Nf3 Bd6 c3 Na5 h6 Nc4 Bxc4 bxc4 hxg7
 33/45	00:35	 262'757k	7'359k	+0.07	a4 Nf4 Ne4 Ng6 h4 Qg4 g3 h6 axb5 axb5 Rxa8 Bxa8 c3 Na5 Nh2 Qxd1 Bxd1 Rd8 Nd2 Nc6 Bc2 Nf8 Ng4 Nd7 b4 Bb7 h5 Ra8 Bb3 Ra1 Ne4 Nd8 Bd2 Rxe1+ Bxe1 Ne6 Bxe6
 34/44+	00:36	 272'036k	7'361k	+0.15	a4
 34/49	00:37	 275'268k	7'360k	+0.13	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 g4 Kh7 Qf3 Bc6 Qf5+ g6 hxg6+ fxg6 Qxd7 Bxd7 Bd5 Bxg4 Ra1 Kg7 Bc6 Nf7 Ra7 Rc8 Bxb5 Bf5 Bc6 Nd6 Kf2 Nxe4+ Bxe4 h5
 35/48+	00:44	 326'809k	7'344k	+0.21	a4
 35/54+	00:52	 384'298k	7'346k	+0.29	a4
 35/55	00:54	 397'549k	7'345k	+0.20	a4 Nf4 Ne4 Ng6 Be3 h6 axb5 axb5 Rxa8 Bxa8 h4 Qg4 g3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 Kg7 Be6 Bc6 c3 b4 cxb4 Bxe4 Nxe4 Bxb4 Ng3 Nf7 Bxf7 Kxf7 hxg6+ Kxg6
 36/42-	00:56	 413'360k	7'347k	+0.12	a4 Nf4
 36/56	01:09	 513'777k	7'355k	+0.05	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Nc3 Bc6 hxg6+ Kxg6 Bd5 Bd7+ Kg2 Kg7 Nf3 Ng6 Kf2 Bd6 Nd2 Ne7
 37/55	01:11	 524'475k	7'356k	+0.07	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 Kg7 Be6 Bc6 hxg6 Kxg6 Bf5+ Kg7 Nf3 Nf7 Kh5 Bxe4 Bxe4 Bc5 d4 exd4 exd4 Be7 Bd3
 38/56	01:39	 728'237k	7'329k	+0.06	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 Kg7 Be6 Bc6 hxg6 Kxg6 Bf5+ Kg7 Nf3 Nf7 Kh5 Bxe4 Bxe4 Bc5 d4 exd4 exd4 Be7 Bd3 b4
 39/64	01:42	 752'872k	7'326k	+0.10	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 c3 Na5 Nfd2 Qxd1 Bxd1 Rd8 b4 Nc6 Be2 f5 Nc5 Bxc5 bxc5 Nf8 Nf3 Ne6 d4 exd4 Bxb5 Nxc5 Bxc6 Bxc6 Nxd4 Be4 f3 Nd3 Rd1 c5 fxe4 Nxc1 Rxc1 cxd4 Rd1 Re8 cxd4 Rxe4 d5 Kf7 Kg2 Ke7 Ra1 g6 Ra6 Rd4 Rxg6
 40/59	01:59	 870'010k	7'285k	+0.12	a4 Nf4 Ne4 Ng6 Be3 h6 axb5 axb5 Rxa8 Bxa8 h4 Qg4 g3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 gxh5+ Kxh5 Ng6 Be6 Nh4 Nc3 Ng2 Bd5 b4 Bxa8 bxc3 bxc3
 41/33+	02:16	 997'313k	7'298k	+0.20	a4
 41/53+	02:25	 1'060'308k	7'306k	+0.28	a4
 41/56+	02:43	 1'196'636k	7'302k	+0.40	a4
 41/56	02:55	 1'278'641k	7'301k	+0.13	a4 Nf4 Ne4 Ng6 Be3 h6 Nfd2 Kh7 Nc5 Bxc5 Bxc5 Rfd8 Qg4 f5 Qg3 Na5 Ba2 Bd5 Nf3 Nc6 Bxd5 Qxd5 b4 a5 axb5 axb4 Rxa8 Rxa8 bxc6 Qxc5 Nxe5 Nxe5 Rxe5 Qxc2 Re7 Rg8 Qxc7 b3 Qb6 Qxd3 Rb7 Qd1+ Kh2 b2 Qxb2 Qd6+ g3 Qxc6 Rb8 Qd5 Rxg8 Qxg8

[Vinvin]

Stockfish_20032021_x64_modern:
...

I don't know what is the problem with your SF, but mine ...

Stockfish 240321:

Why do you compare a version from March 2020 with a version from April 2021 ?

[Milos]

Stockfish_20032021_x64_modern:
...

I don't know what is the problem with your SF, but mine ...

Stockfish 240321:

Why do you compare a version from March 2020 with a version from April 2021 ?

First to show that the issue doesn't exist any more. Second, because the issue is not in the network, but in the search/pruning code of SF.
Why are you comparing a year old SF and claim a tactical mistake? You could also analyses with SF 1.6.1 or Glaurung, but what's the purpose?

[Guenther]

Stockfish_20032021_x64_modern:
...

I don't know what is the problem with your SF, but mine ...

Stockfish 240321:

Why do you compare a version from March 2020 with a version from April 2021 ?

First to show that the issue doesn't exist any more. Second, because the issue is not in the network, but in the search/pruning code of SF.
Why are you comparing a year old SF and claim a tactical mistake? You could also analyses with SF 1.6.1 or Glaurung, but what's the purpose?

What's the purpose of your selective reply to a one year old analysis...instead to Vincents newer analysis?
Is there a reason to pick an old thread and then reply to the first post instead newer relevant posts there?

[Milos]

Stockfish_20032021_x64_modern:
...

I don't know what is the problem with your SF, but mine ...

Stockfish 240321:

Why do you compare a version from March 2020 with a version from April 2021 ?

First to show that the issue doesn't exist any more. Second, because the issue is not in the network, but in the search/pruning code of SF.
Why are you comparing a year old SF and claim a tactical mistake? You could also analyses with SF 1.6.1 or Glaurung, but what's the purpose?

What's the purpose of your selective reply to a one year old analysis...instead to Vincents newer analysis?
Is there a reason to pick an old thread and then reply to the first post instead newer relevant posts there?

Coz I don't have time to go through 4 pages of irrelevant stuff. I post the analysis from the latest SF dev that clearly shows that the whole previous discussion is irrelevant since there is absolutely no problem in SF analysis any more. That is also valid to "more recent" analysis of SF13 where there is still some delay in dropping out the wrong move.

[Chessqueen]

Stockfish_20032021_x64_modern:
...

I don't know what is the problem with your SF, but mine ...

Stockfish 240321:

Why do you compare a version from March 2020 with a version from April 2021 ?

First to show that the issue doesn't exist any more. Second, because the issue is not in the network, but in the search/pruning code of SF.
Why are you comparing a year old SF and claim a tactical mistake? You could also analyses with SF 1.6.1 or Glaurung, but what's the purpose?

What's the purpose of your selective reply to a one year old analysis...instead to Vincents newer analysis?
Is there a reason to pick an old thread and then reply to the first post instead newer relevant posts there?

Coz I don't have time to go through 4 pages of irrelevant stuff. I post the analysis from the latest SF dev that clearly shows that the whole previous discussion is irrelevant since there is absolutely no problem in SF analysis any more. That is also valid to "more recent" analysis of SF13 where there is still some delay in dropping out the wrong move.

WOW

[Chessqueen]

While commenting a game from yesterday at candidates, Yannick Gozzoli pointed that 12.Nxe5 is a mistake because 12. Nxe5 Nxe5 13. Rxe5 Nf4!! 14. Nf3 Nxg2!! :

[pgn][Event "FIDE Candidates 2020"]
[Site "Yekaterinburg RUS"]
[Date "2020.03.22"]
[Round "5.2"]
[White "Grischuk, Alexander"]
[Black "Ding, Liren"]
[Result "1/2-1/2"]
[WhiteTitle "GM"]
[BlackTitle "GM"]
[WhiteElo "2777"]
[BlackElo "2805"]
[ECO "C88"]
[Opening "Ruy Lopez"]
[Variation "closed, 7...O-O"]
[WhiteFideId "4126025"]
[BlackFideId "8603677"]
[EventDate "2020.03.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. h3
Bb7 9. d3 d5 10. exd5 Nxd5 11. Nbd2 Qd7 12. a4 f6 13. Ne4 Na5 14. Ba2 c5 15. Be3
Rfc8 16. axb5 axb5 17. Nxc5 Rxc5 18. b4 Rcc8 19. bxa5 Kh8 20. Bd2 Nb4 21. Bb3
Bd5 22. Bxd5 Qxd5 23. Rc1 Nc6 24. c4 bxc4 25. Rxc4 Nxa5 26. Rxc8+ Rxc8 27. d4
Nc6 28. dxe5 Nxe5 29. Nxe5 fxe5 30. Qg4 Rd8 31. Be3 Bf6 32. Rc1 Qd7 33. Qh5 Qe8
34. Qf3 Rc8 35. Rd1 Rd8 36. Rc1 Rc8 37. Rb1 Rb8 38. Re1 Qg6 39. Ba7 Rc8 40. Qb7
Qc2 41. Be3 Qc6 42. Qb4 h5 43. Bc1 Qc2 44. Be3 Rd8 45. Qb1 Qxb1 46. Rxb1 Kh7 47.
g4 hxg4 48. hxg4 Rd6 49. Kg2 Kg6 50. Kf3 Bg5 51. Ke4 Bxe3 52. fxe3 Re6 53. Rb7
Re8 54. Ra7 1/2-1/2[/pgn]

[d]r4rk1/1bpqbppp/p1n5/1p1np3/8/1B1P1N1P/PPPN1PP1/R1BQR1K1 w - - 2 12

But even after 1 billions nodes Stockfish still thinks that 12.Nxe5?? is good for white
Not every run but very often, Stockfish can't refute 12.Nxe5??

Code: Select all

Stockfish_20032021_x64_modern:
...
 22/43	00:04	 29 900 094	7 357 306	+0,24	12.Ne4 Rad8 13.Ng3 f6 14.c3 Na5 15.Bc2 c5 16.a4 b4 17.d4 bxc3 18.dxe5 Qc7 19.Qd3 g6 20.Nf5 Nb4 21.Nxe7+ Qxe7 22.Qxc3 Bxf3 23.gxf3 Nxc2 24.Qxc2 fxe5 25.f4 Nc6 26.Ra3 Nd4 27.Qc4+ Qe6 28.Qxe6+ Nxe6 29.fxe5
 23/39-	00:04	 36 447 770	7 335 031	+0,15	12.Ne4 Kh8
 23/39+	00:05	 38 062 850	7 321 186	+0,24	12.Ne4
 23/39	00:05	 39 568 235	7 315 258	+0,25	12.Ne4 Kh8 13.a4 b4 14.d4 exd4 15.a5 Rae8 16.Qd3 Nf6 17.Bd2 h6 18.Ba4 Rd8 19.Ng3 Rfe8 20.Ne5 Qd5 21.Nxc6 Bxc6 22.Bxc6 Qxc6 23.Nf5 Qc5 24.Nxe7 Rxe7 25.Rxe7 Qxe7
 24/27-	00:05	 40 345 966	7 314 352	+0,15	12.Ne4 Kh8
 24/32+	00:05	 41 099 153	7 315 619	+0,25	12.Ne4
 24/37	00:06	 44 490 985	7 317 596	+0,33	12.Ne4 Kh8 13.a4 b4 14.a5 Rad8 15.Ba4 f6 16.c4 bxc3 17.bxc3 Qc8 18.d4 exd4 19.cxd4 Nxa5 20.Qc2 Bb4 21.Bd2 Bxd2 22.Nexd2 Nb4 23.Qc3 Nac6 24.Bb3 a5
 25/16-	00:06	 49 225 042	7 285 043	+0,23	12.Ne4 Kh8
 25/20-	00:07	 57 592 222	7 243 393	+0,13	12.Ne4 Kh8
 25/36+	00:08	 59 407 443	7 245 693	+0,23	12.Ne4
 25/39	00:08	 60 222 963	7 240 947	+0,32	12.Ne4 Kh8 13.Ng3 Nf4 14.Bxf4 exf4 15.Ne4 Nd4 16.Nxd4 Qxd4 17.c3 Qd8 18.Nd2 Qd6 19.Qh5 g6 20.Qh6 c5 21.Ne4 Qc7 22.d4 cxd4 23.cxd4 Rad8 24.Rad1 Bd5 25.Bxd5
 26/39-	00:09	 66 645 571	7 275 717	+0,22	12.Ne4 Kh8
 26/39-	00:10	 79 762 859	7 290 937	+0,12	12.Ne4 Kh8
 26/40+	00:11	 84 492 241	7 302 069	+0,22	12.Ne4
 26/44	00:11	 85 832 402	7 303 642	+0,16	12.Ne4 Kh8 13.Ng3 Nf4 14.Bxf4 exf4 15.Ne4 Nd4 16.Nxd4 Qxd4 17.c3 Qd8 18.Nd2 Qd6 19.d4 c5 20.Qe2 Rae8 21.Nf3 Qf6 22.Rad1 Bc6 23.Bc2 Bd6 24.Ne5 Bxe5 25.dxe5 Qg5 26.Qg4 Qxg4 27.hxg4
 27/39-	00:14	 109 324 721	7 295 610	+0,06	12.Ne4 Kh8
 27/40+	00:15	 112 256 786	7 300 304	+0,16	12.Ne4
 27/41	00:16	 119 299 533	7 294 822	+0,13	12.Ne4 Kh8 13.Ng3 Nf4 14.Bxf4 exf4 15.Ne4 Nd4 16.Nxd4 Qxd4 17.c3 Qd8 18.Nd2 Qd6 19.a4 c5 20.axb5 axb5 21.Rxa8 Bxa8 22.Qe2 Qg6 23.Qg4 Bf6 24.Qxg6 fxg6 25.Ne4 Bxe4 26.dxe4 Be5 27.Rd1 g5 28.Be6 g6 29.Bd7 b4 30.cxb4
 28/47+	00:17	 124 508 400	7 295 699	+0,23	12.Ne4
 28/47+	00:17	 127 982 320	7 294 518	+0,32	12.Ne4
 28/47	00:20	 148 747 985	7 289 781	+0,17	12.Ne4 Rad8 13.a4 b4 14.Ng3 f6 15.d4 Nxd4 16.Nxd4 exd4 17.Qxd4 Kh8 18.Ne4 Rfe8 19.Bd2 Qc6 20.Qc4 Qxc4 21.Bxc4 a5 22.Bb5 Rf8 23.c4 bxc3 24.bxc3 Nb6 25.Rab1 Bd5 26.Ng3 Nc4 27.Rxe7
 29/39-	00:26	 193 100 065	7 306 370	+0,07	12.Ne4 Kh8
 29/43+	00:26	 195 524 096	7 304 396	+0,17	12.Ne4
 29/43	00:30	 222 090 245	7 306 080	+0,06	12.Ne4 Kh8 13.a4 b4 14.a5 Rad8 15.Ba4 f6 16.c4 bxc3 17.bxc3 Qc8 18.Bd2 Nxa5 19.Bc2 Nc6 20.Ng3 f5 21.Bb3 f4 22.Ne4 Qf5 23.Bc2 Nb6 24.Kh2 Qh5 25.Qb1 Rb8 26.d4 Nd5 27.Qa2 exd4 28.cxd4
 30/47+	00:40	 298 154 489	7 294 656	+0,15	12.Nxe5
 30/47+	00:41	 303 526 743	7 299 298	+0,25	12.Nxe5
 30/49	00:41	 306 422 307	7 300 462	+0,18	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Bxe4 16.dxe4 Qxd1 17.Rxd1 Bc5 18.Bd2 Rxe4 19.Kf1 Re7 20.Bg5 Rfe8 21.Bxf6 gxf6 22.Rd5 Bd6 23.Rad1 Rb8 24.Rf5 Kg7 25.c3 Rbe8 26.a4 bxa4 27.Bxa4 Rb8 28.b3 h6 29.Rf3 Be5
 31/49-	00:51	 370 967 343	7 259 492	+0,08	12.Nxe5 Nxe5
 31/49	00:51	 376 630 255	7 262 162	+0,12	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bd6 19.a4 Rb8 20.a5 Rfe8 21.Rd2 h6 22.c3 Re7 23.Rad1 Bc6 24.Bd5 Bxd5 25.Rxd5 Rbe8 26.Kf1 Re6 27.b4 Kh7 28.Bc5 Be5 29.Bd4 Bd6 30.Be3 Be5 31.R5d3 f5 32.Kg1 f4 33.Bc5
 32/52+	00:53	 388 302 935	7 247 702	+0,22	12.Nxe5
 32/52	00:54	 390 817 599	7 229 731	+0,15	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bd6 19.a4 Rb8 20.a5 Rfe8 21.Rd2 h6 22.c3 Re7 23.Rad1 Bc6 24.Bd5 Bxd5 25.Rxd5 Rbe8 26.Kf1 Re6 27.b4 f6 28.Bc5 Be5 29.Bd4 Bd6 30.Be3 Be5 31.Rc5 R8e7 32.c4 Bd6 33.Rc6 Bxb4 34.cxb5 Rxc6 35.bxc6
 33/54+	01:04	 465 143 116	7 227 208	+0,24	12.Ne4
 33/54	01:09	 500 498 476	7 225 953	+0,21	12.Ne4 Kh8 13.a4 b4 14.a5 Rad8 15.Ba4 f6 16.d4 Qc8 17.c4 bxc3 18.bxc3 exd4 19.cxd4 Nxa5 20.Qe2 Bb4 21.Bd2 Bxd2 22.Qxd2 Nc4 23.Qc1 Ndb6 24.Bb3 Bd5 25.Nc5 Bxf3 26.Bxc4 Nxc4 27.Qxc4 Bd5 28.Qd3 Rfe8 29.Rxe8+ Rxe8 30.Nxa6 Qd7 31.Nb4 Qd6 32.Qd2 Qd7
 34/46+	01:13	 531 642 073	7 235 489	+0,31	12.Ne4
 34/50	01:20	 582 949 316	7 262 989	+0,14	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Bc6 20.cxb5 axb5 21.a4 c4 22.axb5 Bxb5 23.Ba4 Bxa4 24.Rxa4 Rb8 25.Rd7 Bf6 26.Rxc4 Bxb2 27.g3 Rfd8 28.Rxd8+ Rxd8 29.Kh2 Bf6 30.Kg2 Be5 31.f4 Bd6 32.Rc6
 35/62+	01:26	 626 446 197	7 284 258	+0,24	12.Nxe5
 35/62+	01:27	 635 006 411	7 295 569	+0,34	12.Nxe5
 35/62	01:31	 668 111 798	7 315 760	+0,25	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bg6 19.c3 Rd8 20.Bd5 h6 21.Bc6 f6 22.Bf4 Rxd1+ 23.Rxd1 Rd8 24.Rxd8+ Bxd8 25.f3 Bf7 26.b3 Be6 27.Bg3 Kf7 28.Bb7 a5 29.Bc6 a4 30.Bxb5 axb3 31.axb3 Bxb3 32.Kf2 g5 33.Ke3
 36/55-	01:37	 705 995 145	7 277 100	+0,15	12.Nxe5 Nxe5
 36/60+	01:38	 717 971 463	7 260 671	+0,25	12.Nxe5
 36/60	01:42	 740 053 972	7 239 320	+0,13	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rac1 Rxd1+ 21.Rxd1 Rb8 22.Bf4 Rb7 23.Bd6 Bf8 24.Be5 Be7 25.a4 bxc4 26.Bxc4 Bc2 27.Re1 Bxa4 28.Bxa6 Ra7 29.Bc4 Bc6 30.f3 Kf8 31.b3 Be8 32.Kf2 f6 33.Bc3 Bf7 34.Re2 Rb7 35.Bxf7 Kxf7
 37/55+	01:47	 774 052 922	7 224 282	+0,23	12.Nxe5
 37/56+	01:49	 791 599 904	7 214 793	+0,32	12.Nxe5
 37/56	01:51	 805 595 230	7 207 035	+0,36	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rac1 Rxd1+ 21.Rxd1 Rb8 22.Bf4 Rb7 23.Bd6 Bf8 24.Be5 Be7 25.a4 Kf8 26.axb5 f6 27.Bc3 axb5 28.cxb5 Rxb5 29.Bc4 Rb8 30.f3 Bg6 31.Kf2 Rd8 32.Rxd8+ Bxd8 33.Ke2 Be7 34.g4 Bd6 35.Ke3 Ke7
 38/57-	02:15	 970 889 886	7 150 515	+0,26	12.Nxe5 Nxe5
 38/57-	02:25	1 039 595 084	7 156 640	+0,16	12.Nxe5 Nxe5
 38/57	02:39	1 141 285 295	7 166 446	+0,13	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rdc1 Rc8 21.Bc2 Bxc2 22.Rxc2 Rfd8 23.cxb5 axb5 24.a4 bxa4 25.Rxa4 Rb8 26.g3 Bf6 27.Rxc5 Bxb2 28.Kg2 g6 29.Ra7 Ra8 30.Rxa8 Rxa8 31.Kf3 Kg7 32.g4 Rd8 33.Rb5 Bf6 34.g5
 39/61	02:51	1 242 881 798	7 228 284	+0,13	12.Nxe5 Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 c5 19.c4 Rd8 20.Rac1 Rxd1+ 21.Rxd1 Rb8 22.Rd7 Rb7 23.Rd2 h6 24.a4 Bc6 25.cxb5 axb5 26.axb5 Rxb5 27.Ba4 Rb6 28.Bxc6 Rxc6 29.g4 c4 30.Rc2 Bf6 31.b4 c3 32.b5 Rd6 33.f3 Rd1+ 34.Kf2 Rb1 35.b6 Rb2 36.Re2 Rb1 37.Kg2 Rb2
 40/56+	02:53	1 255 863 301	7 233 610	+0,23	12.Nxe5

I don't know what is the problem with your SF, but mine latest SF version takes only 4s and depth of 23 to discard Nxe5 and then sticks to a4.

Code: Select all

FEN: r4rk1/1bpqbppp/p1n5/1p1np3/8/1B1P1N1P/PPPN1PP1/R1BQR1K1 w - - 2 12

Stockfish 240321:
NNUE evaluation using nn-62ef826d1a6d.nnue enabled
 1/1	00:00	 551	276k	+0.26	c3
 2/2	00:00	 1k	679k	+1.75	a3 b4
 3/3	00:00	 2k	1'196k	+0.27	a3 a5 c3
 4/4	00:00	 3k	1'663k	+0.74	Nxe5 Nxe5 Rxe5
 5/5	00:00	 7k	3'511k	+0.19	Nxe5 Nxe5 Rxe5 Nf4 Ne4
 6/6	00:00	 8k	2'763k	+1.05	Nxe5 Nxe5 Rxe5 Nf4
 7/7	00:00	 23k	5'658k	+0.20	a4 Rad8 axb5 axb5 Nxe5 Nxe5 Rxe5
 8/8	00:00	 25k	5'028k	+0.29	Nxe5 Nxe5 Rxe5 Bf6 Re4 Rad8 Nf3
 9/12	00:00	 34k	5'729k	+0.73	a4 Rad8 axb5 axb5 Nxe5 Nxe5
 10/11	00:00	 62k	6'906k	+0.67	Nxe5 Nxe5 Rxe5 c5 Nf3 Rae8 Re1
 11/14	00:00	 133k	7'399k	+0.75	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 Be3 Rfe8 a4 Bf6 axb5 axb5
 12/19	00:00	 237k	7'659k	+0.74	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rad8 a4 c5 Be3 Rfe8 axb5 axb5
 13/18	00:00	 284k	7'882k	+0.72	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 c3 Qxd3 Qxd3 Rxd3 axb5 axb5 Bc2 Rd7
 14/22	00:00	 384k	7'999k	+0.71	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rae8 Be3 c5 a4 h6 c3 Bd6 d4 c4 axb5 axb5 Bc2
 15/24	00:00	 748k	8'046k	+0.76	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rae8 Be3 h6 axb5 axb5 c3 Bd6 Bc2
 16/25	00:00	 966k	8'187k	+0.70	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rae8 c3 c5 Be3 Bd6 a4 h6 axb5 axb5 Bc2 Nf4 Bxf4 Rxe1+ Nxe1 Bxf4 d4 c4
 17/35	00:00	 1'732k	8'056k	+0.78	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 c5 Be3 Rac8 a4 h6 Ne5 Nxe5 Rxe5 Bd6 Rh5 Rfe8 Qg4 Qxg4
 18/31	00:00	 6'255k	7'848k	+0.66	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 Rad8 Be3 c5 Bxc5 Bxc5 Rxc5 Nf4 Rg5 Qe7 Qd2 Qf6 Rg3 Nh5 Rg4 Bxf3 gxf3 Qxb2 Re1 Rfe8 Rxe8+ Rxe8 Qg5 Qf6 Qxf6 Nxf6
 19/34	00:00	 7'676k	7'817k	+0.48	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rae8 axb5 axb5 c4 Bf6 Rxe8 Qxe8 Be3 Qc6 cxb5 Qxb5 Bc4 Qxb2 Ra5 Bxf3 Qxf3 Ne5 Qd5 Nxc4 dxc4
 20/34	00:01	 10'318k	7'764k	+0.43	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 c3 Rae8 Be3 h6 d4 c4 Bc2 Bd6 a4 b4 Bxg6 fxg6 Ne5 Bxe5 dxe5 Qc6 f3 bxc3 bxc3 Rxe5 Bd4 Rxe1+ Qxe1 Re8
 21/32	00:01	 11'624k	7'759k	+0.37	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 c5 c3 Rad8 d4 c4 Bc2 f5 Be3 Rde8 Ne5 Qd5 Qf3 Qxf3 Nxf3 Bxf3 gxf3 Nh4 Rd1 Nxf3+ Kf1
 22/34	00:01	 13'530k	7'767k	+0.62	Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Rh5 Rad8 Be3 c5 c3 Qc7 d4 Bd6 a4 Rfe8 axb5 axb5 Rg5 c4 Bc2 b4 Rb5 Qc6
 23/35-	00:03	 26'721k	7'589k	+0.09	Nxe5 Nxe5
 23/35	00:04	 35'815k	7'487k	+0.13	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 c3 Na5 Bc2 c5 Be3 Qd5 d4 exd4 cxd4 cxd4 Bxd4 Bb4 Bc3 Bxc3 Nxc3 Qxd1 Bxd1 Rd8 Be2
 24/35+	00:05	 39'752k	7'464k	+0.21	a4
 24/37	00:05	 43'757k	7'456k	+0.06	a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 c3 h6 Ng3 Rd8 Bc2 b4 Qe2 Qd5 Nf5 Bf8 Ne3 Nf4 Nxd5 Nxe2+ Rxe2 Rxd5 Re1 Ra5 Bd2 Ra2
 25/47+	00:06	 49'530k	7'438k	+0.14	a4
 25/47+	00:06	 50'385k	7'436k	+0.22	a4
 25/47	00:07	 54'351k	7'412k	+0.21	a4 Nf4 Ne4 Ng6 Be3 h6 Nfd2 Nd4 Bxd4 exd4 axb5 axb5 Rxa8 Bxa8 Qh5 Nf4 Qg4 Qxg4 hxg4 Bb4 g3 Nh3+ Kf1 Ng5 Ra1 Bc6 Ra7 Ra8
 26/33-	00:07	 58'693k	7'404k	+0.13	a4 Nf4
 26/38-	00:08	 64'050k	7'407k	+0.05	a4 Nf4
 26/38+	00:09	 71'365k	7'401k	+0.13	a4
 26/38	00:10	 77'026k	7'404k	+0.24	a4 Nf4 Ne4 Ng6 Be3 h6 c3 Na5 Ba2 Bd5 Bxd5 Qxd5 b4 Nb7 Ng3 c5 Nf5 cxb4 Nxe7+ Nxe7 cxb4 f6 Nh4 Qd7 axb5 axb5 Rxa8 Rxa8 Qc2
 27/22-	00:10	 77'831k	7'405k	+0.16	a4 Nf4
 27/33	00:11	 83'554k	7'397k	+0.11	a4 Nf4 Ne4 Ng6 Be3 h6 Nc5 Bxc5 Bxc5 Rfe8 Nd2 Nf4 Qg4 Qxg4 hxg4 Na5 f3 Nxb3 Nxb3 f6 Na5 Bc8 d4 Ne6 Nb3 bxa4 Rxa4 Bd7 Rc4 Bb5 Rc3
 28/40+	00:12	 91'081k	7'363k	+0.19	a4
 28/41	00:12	 93'536k	7'351k	+0.22	a4 Nf4 Ne4 Ng6 Be3 h6 Nc5 Bxc5 Bxc5 Rfe8 Nd2 Na5 Ba2 Nf4 Ne4 Bxe4 dxe4 Qc6 Be3 Nc4 axb5 axb5 Bxc4 Qxc4 Rxa8 Rxa8 Bxf4 exf4 e5 b4 Qg4 Qxc2 Qxf4 b3 Qd4
 29/36-	00:13	 97'769k	7'328k	+0.13	a4 Nf4
 29/39-	00:14	 108'595k	7'325k	+0.05	a4 Nf4
 29/39+	00:15	 110'503k	7'324k	+0.13	a4
 29/41	00:17	 124'907k	7'324k	 0.00	a4 Nf4 Ne4 Ng6 Be3 h6 c3 Na5 Ba2 bxa4 h4 Bd6 Nfd2 Nxh4 Qh5 Be7 Qxe5 Qg4 g3 Qh3 gxh4 Bd6 Qxa5 Bh2+ Kh1 Bf4+ Kg1
 30/45+	00:17	 129'260k	7'332k	+0.08	a4
 30/45	00:18	 135'301k	7'348k	+0.09	a4 Nf4 Ne4 Ng6 Be3 h6 Nc5 Bxc5 Bxc5 Rfe8 Nd2 Na5 Qg4 Qxg4 hxg4 Nxb3 Nxb3 Bc6 axb5 axb5 Be3 Ra4 f3 Rea8 Rxa4 Rxa4 Nc5 Ra2 Rb1 Kh7 Kf2 Bd5 Ne4 b4 Nc5
 31/41+	00:19	 145'916k	7'355k	+0.17	a4
 31/44-	00:27	 199'196k	7'353k	 0.00	a4 Nf4
 31/44+	00:28	 209'320k	7'353k	+0.12	a4
 31/44	00:28	 211'673k	7'353k	+0.15	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 c3 b4 Be3 Nf4 Nxe5 Nh3+ Kh2 Qxd1 Rxd1 Nxe5 Kxh3 Rb8 Bc2 Bc6 Ra1 bxc3 bxc3 Bd7+ Kg2 Rb2 Ra5 Bd6 d4 Rxc2
 32/47-	00:30	 224'794k	7'346k	+0.07	a4 Nf4
 32/47+	00:31	 228'263k	7'346k	+0.15	a4
 32/47	00:31	 233'669k	7'347k	+0.14	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 Na5 Ba2 h6 Nfd2 Qxd1 Rxd1 Rd8 Re1 Nc6 h5 Nf8 Nf3 Nd7 g4 Nf6 g5 Nxe4 dxe4 hxg5 Nxg5 Rf8 Nf3 Bd6 c3 Na5 h6 Nc4 Bxc4 bxc4 hxg7
 33/45	00:35	 262'757k	7'359k	+0.07	a4 Nf4 Ne4 Ng6 h4 Qg4 g3 h6 axb5 axb5 Rxa8 Bxa8 c3 Na5 Nh2 Qxd1 Bxd1 Rd8 Nd2 Nc6 Bc2 Nf8 Ng4 Nd7 b4 Bb7 h5 Ra8 Bb3 Ra1 Ne4 Nd8 Bd2 Rxe1+ Bxe1 Ne6 Bxe6
 34/44+	00:36	 272'036k	7'361k	+0.15	a4
 34/49	00:37	 275'268k	7'360k	+0.13	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 g4 Kh7 Qf3 Bc6 Qf5+ g6 hxg6+ fxg6 Qxd7 Bxd7 Bd5 Bxg4 Ra1 Kg7 Bc6 Nf7 Ra7 Rc8 Bxb5 Bf5 Bc6 Nd6 Kf2 Nxe4+ Bxe4 h5
 35/48+	00:44	 326'809k	7'344k	+0.21	a4
 35/54+	00:52	 384'298k	7'346k	+0.29	a4
 35/55	00:54	 397'549k	7'345k	+0.20	a4 Nf4 Ne4 Ng6 Be3 h6 axb5 axb5 Rxa8 Bxa8 h4 Qg4 g3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 Kg7 Be6 Bc6 c3 b4 cxb4 Bxe4 Nxe4 Bxb4 Ng3 Nf7 Bxf7 Kxf7 hxg6+ Kxg6
 36/42-	00:56	 413'360k	7'347k	+0.12	a4 Nf4
 36/56	01:09	 513'777k	7'355k	+0.05	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Nc3 Bc6 hxg6+ Kxg6 Bd5 Bd7+ Kg2 Kg7 Nf3 Ng6 Kf2 Bd6 Nd2 Ne7
 37/55	01:11	 524'475k	7'356k	+0.07	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 Kg7 Be6 Bc6 hxg6 Kxg6 Bf5+ Kg7 Nf3 Nf7 Kh5 Bxe4 Bxe4 Bc5 d4 exd4 exd4 Be7 Bd3
 38/56	01:39	 728'237k	7'329k	+0.06	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 Be3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 Kg7 Be6 Bc6 hxg6 Kxg6 Bf5+ Kg7 Nf3 Nf7 Kh5 Bxe4 Bxe4 Bc5 d4 exd4 exd4 Be7 Bd3 b4
 39/64	01:42	 752'872k	7'326k	+0.10	a4 Nf4 Ne4 Ng6 h4 Qg4 axb5 axb5 Rxa8 Bxa8 g3 h6 c3 Na5 Nfd2 Qxd1 Bxd1 Rd8 b4 Nc6 Be2 f5 Nc5 Bxc5 bxc5 Nf8 Nf3 Ne6 d4 exd4 Bxb5 Nxc5 Bxc6 Bxc6 Nxd4 Be4 f3 Nd3 Rd1 c5 fxe4 Nxc1 Rxc1 cxd4 Rd1 Re8 cxd4 Rxe4 d5 Kf7 Kg2 Ke7 Ra1 g6 Ra6 Rd4 Rxg6
 40/59	01:59	 870'010k	7'285k	+0.12	a4 Nf4 Ne4 Ng6 Be3 h6 axb5 axb5 Rxa8 Bxa8 h4 Qg4 g3 Na5 Ba2 Nc4 Nfd2 Nxe3 fxe3 Qd7 h5 Nh8 Rf1 Kh7 g4 f5 gxf5 Rxf5 Kh2 Rxf1 Qxf1 Qg4 Qh3 Qxh3+ Kxh3 g6 Kg4 gxh5+ Kxh5 Ng6 Be6 Nh4 Nc3 Ng2 Bd5 b4 Bxa8 bxc3 bxc3
 41/33+	02:16	 997'313k	7'298k	+0.20	a4
 41/53+	02:25	 1'060'308k	7'306k	+0.28	a4
 41/56+	02:43	 1'196'636k	7'302k	+0.40	a4
 41/56	02:55	 1'278'641k	7'301k	+0.13	a4 Nf4 Ne4 Ng6 Be3 h6 Nfd2 Kh7 Nc5 Bxc5 Bxc5 Rfd8 Qg4 f5 Qg3 Na5 Ba2 Bd5 Nf3 Nc6 Bxd5 Qxd5 b4 a5 axb5 axb4 Rxa8 Rxa8 bxc6 Qxc5 Nxe5 Nxe5 Rxe5 Qxc2 Re7 Rg8 Qxc7 b3 Qb6 Qxd3 Rb7 Qd1+ Kh2 b2 Qxb2 Qd6+ g3 Qxc6 Rb8 Qd5 Rxg8 Qxg8

WOW Milos, what super computer are you using that can calculate so deep in such short time, Is there another engine that discard 12.Nxe5?, as well

[Chessqueen]

WOW Milos, what super computer are you using that can calculate so deep in such short time, Is there another engine that discard 12.Nxe5?, as well

I don't mind ppl trolling, but there is an intelligent and unintelligent trolling. Yours almost never shows even a trace of intelligence...

I am too stupid to post here, but by slow intel i7 4770 3.40 GHz also found it very fast with the newer version of stockfish
NOW it is time for all my haters to call me TROLL ( unintelligent trolling)

FEN: r4rk1/1bpqbppp/p1n5/1p1np3/8/1B1P1N1P/PPPN1PP1/R1BQR1K1 w - - 2 12

Stockfish 13:
6/6 00:00 6k 2,972k +0.68 Nxe5 Nxe5 Rxe5 a5 Re1 a4
7/7 00:00 8k 4,205k +0.19 Nxe5 Nxe5 Rxe5 Nf4 Ne4
8/11 00:00 11k 3,537k +1.08 Nxe5 Nxe5 Rxe5 a5 a4
9/9 00:00 12k 3,954k +1.30 Nxe5 Nxe5 Rxe5 Nb6 Re1 Rae8
10/14 00:00 25k 4,976k +1.43 Nxe5 Nxe5 Rxe5 Bf6 Re1 Rfe8 Rxe8+ Qxe8 Ne4
11/15 00:00 105k 5,516k +0.54 Nxe5 Nxe5 Rxe5 Nf4 Qg4 Qxg4 hxg4 Bf6 Rc5 Ne2+ Kf1 Nxc1 Rxc1 Bxb2 Rb1
12/20 00:00 145k 5,563k +0.73 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Nxh3+ gxh3 Qxh3 Bd5 Bxd5 Rxd5
13/19 00:00 239k 5,982k +0.56 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rad8 c3 c5 d4 cxd4 Qxd4 Bxf3 Qxd7 Rxd7 gxf3
14/21 00:00 373k 6,107k +0.62 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 Rad8 c3 c5 d4 cxd4 cxd4 Qf5
15/27 00:00 561k 6,375k +0.50 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 c3 Rad8 d4 cxd4 cxd4 Bb4 Rf1 Rfe8 Bg5 Be7 Re1
16/26 00:00 611k 6,368k +0.44 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 Be3 Qc7 axb5 axb5 Qe2 Bf6 c3 Rfe8
17/26 00:00 773k 6,440k +0.61 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 Be3 h6 c3 Qxd3 Qxd3 Rxd3 Bc2 Rdd8 Bxg6 fxg6 Ne5 Bd6 Nxg6 Rfe8
18/31 00:00 1,109k 6,602k +0.47 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 a4 Rad8 Be3 Qc6 c3 Bf6 d4 Rfe8 axb5 axb5 d5 Qc7
19/29 00:00 1,149k 6,564k +0.50 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 c3 Rad8 d4 cxd4 Qxd4 Bxf3 Qxd7 Rxd7 gxf3 Nh4 Rd1 Nxf3+ Kf1 Rxd1+ Bxd1 Ne5 Be2 Rd8 Be3 Nc4
20/34 00:00 1,398k 6,628k +0.75 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Ng6 Re1 c5 c3 Rad8 d4 cxd4 Qxd4 Bxf3 Qxd7 Rxd7 gxf3 Nh4 Kf1 Nxf3 Re3 Nh4 Re6 Bd6 Re4 Nf5
21/33 00:00 4,261k 6,839k +0.62 Nxe5 Nxe5 Rxe5 Nf4 Nf3 Nxh3+ gxh3 c5 Bf4 c4 dxc4 Qxh3 Bg3 Bd6 Qf1 Qxf1+ Rxf1 Bxf3 Re3 Bxg3 fxg3 Bc6 c5 Ra7 c3 Rd7 Re2 Rfd8 Rfe1 Rd2 Rxd2
22/35 00:02 14,871k 6,778k +0.09 Ne4 Kh8 d4 exd4 c3 Rae8 cxd4 Nf6 Nc5 Bxc5 dxc5 Qxd1 Rxd1 Na5 Bc2 Bxf3 gxf3 Nc6 Be3 a5 Bf5
23/28 00:02 18,702k 6,766k +0.13 Ne4 Kh8 Nfg5 f6 c4 fxg5 cxd5 Nd4 Bxg5 Bd6 Be3 Nxb3 Qxb3 Qf7 a4 Bxd5 Qc3 Kg8 Rac1 Rae8 Nxd6 cxd6 axb5
24/26+ 00:03 21,761k 6,754k +0.29 a4
24/29- 00:03 22,204k 6,751k +0.05 a4 Nf4
24/32 00:03 26,054k 6,755k 0.00 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 c3 Na5 Bc2 c5 Be3 Qc6 Ng3 Qd7 Bc1
25/9+ 00:03 26,218k 6,752k +0.08 a4
25/33+ 00:03 26,481k 6,748k +0.16 a4
25/33 00:03 26,544k 6,746k +0.08 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Ng3 h6 c3 Rd8 Bc2 b4 Bd2 Bb7 Qe2 Qd5 Nf5 bxc3 bxc3 Bf8 Qe4 Qxe4 Rxe4 Nce7 Nxe7+ Bxe7 Ra4
26/30- 00:04 29,997k 6,744k 0.00 a4 Nf4
26/35+ 00:04 31,053k 6,740k +0.08 a4
26/35 00:04 32,486k 6,737k +0.05 a4 Nf4 Ne4 Ng6 c3 h6 Be3 Rfd8 axb5 axb5 Bc2 b4 Rxa8 Bxa8 Ng3 bxc3 bxc3 Bb7 Ne4 Ba6 d4 exd4 cxd4 Nb4 Bb1 Bb7 Ng3 Bd5 Bxg6 fxg6
27/49 00:06 44,751k 6,748k +0.09 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 f6 Qg3 Rd8 f4 Qxd3 Qxd3 Rxd3 fxe5 fxe5 Rxe5 Rd1+ Kh2 Bxg2 Kxg2 Rxc1 Rxb5 Rc2+ Kf3 Rxb2 Ke4 Rh2 Rc5 Rxh3 Rxc7 Rxb3
28/43+ 00:08 60,114k 6,727k +0.17 Ne4
28/43+ 00:09 63,283k 6,726k +0.25 Ne4
28/43+ 00:12 81,190k 6,712k +0.38 Ne4
28/49 00:12 81,840k 6,712k +0.04 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 f6 Qg3 Rd8 f4 Qxd3 Qxd3 Rxd3 fxe5 fxe5 Rxe5 Rd1+ Kh2 Bxg2 Kxg2 Rxc1 Rxb5 Rc2+ Kf3 Rxb2 Rc5 Rxb3+ Kg4 Kh7 Rxc7 Kh6 Kf5 Rf3+ Ke4 Rxh3
29/55 00:12 85,749k 6,711k 0.00 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 f6 Qg3 Rd8 f4 Qxd3 Qxd3 Rxd3 fxe5 fxe5 Rxe5 Rd1+ Kh2 Bxg2 Kxg2 Rxc1 Rxb5 Rc2+ Kg3 Rxb2 Kg4 Rg2+ Kh4 Rb2
30/55 00:14 94,138k 6,706k 0.00 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 f6 Qg3 Rd8 f4 Qxd3 Qxd3 Rxd3 fxe5 fxe5 Rxe5 Rd1+ Kh2 Bxg2 Kxg2 Rxc1 Rxb5 Rc2+ Kf3 Kf7 b4 Kf6 Rc5 Rxb2 Rc6+ Ke5 Rxc7 Rb3+ Kg4 Rxb4+ Kf3 Rb3+ Kg4
31/21+ 00:14 95,919k 6,707k +0.08 a4
31/39 00:14 97,241k 6,705k 0.00 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 f6 Qg6 Rd8 Re3 Qf7 Qf5 Qd7 Qg6
32/37 00:15 101,657k 6,711k +0.02 a4 Nf4 Ne4 Ng6 axb5 axb5 Rxa8 Bxa8 Nfg5 h6 Qh5 hxg5 Qxg6 Nd4 Nxg5 Bxg5 Qxg5 Nxb3 cxb3 f6 Qg6 Rd8 Re3 Qf7 Qf5 Qd7 Qxd7 Rxd7 b4 Rd5 Kh1 c5 bxc5 Rxc5 Bd2 Rc2 Bc3
33/47+ 00:16 113,006k 6,716k +0.10 a4
33/47+ 00:17 116,986k 6,715k +0.18 a4
33/47+ 00:19 127,725k 6,714k +0.31 a4
33/47+ 00:21 144,539k 6,714k +0.49 a4
33/47 00:21 147,107k 6,712k +0.25 a4 Nf4 Ne4 Ng6 Bg5 h6 Bxe7 Qxe7 c3 Na5 Bc2 f5 Ng3 b4 cxb4 Qxb4 Nxe5 Nh4 d4 Nxg2 Nxf5 Nxe1 Qg4 Rxf5 Bxf5 Nb3 Be6+ Kh8 Bxb3 Nf3+ Nxf3 Qxb3 Ne5 Qd5
34/39+ 00:22 154,089k 6,708k +0.33 a4
34/39+ 00:27 184,239k 6,709k +0.41 a4
34/41 00:29 195,340k 6,706k +0.36 a4 Nf4 Ne4 Ng6 h4 Qg4 Bg5 Bxg5 hxg5 Rad8 axb5 axb5 g3 Bc8 Nh2 Qxd1 Rexd1 Nd4 Nd2 Bf5 Nhf3 Nxf3+ Nxf3 e4 dxe4 Bxe4 Nh2 Rxd1+ Rxd1 Bc6 Re1 Re8 Rxe8+ Bxe8 Nf3 b4

[Chessqueen]

WOW Milos, what super computer are you using that can calculate so deep in such short time, Is there another engine that discard 12.Nxe5?, as well

I don't mind ppl trolling, but there is an intelligent and unintelligent trolling. Yours almost never shows even a trace of intelligence...

People who usually believe that they are the smartest, most often are the less educated, therefore, you must also have a master's degree from Princeton University like I do. Anyway I am just an unintelligent Troller posting in a Chess Forum. By the way do you really believe that I make deliberately provocative online posts with the aim of upsetting someone or eliciting an angry response from them ?