Tactical mistake by Stockfish (Grischuk-Ding at candidates)

[Vinvin]

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

[jp]

12.Nxe5 is a mistake because 12. Nxe5 Nxe5 13. Rxe5 Nf4!! 14. Nf3 Nxg2!! :

With Nxe5 Nxe5; Rxe5 on the board,
SF10 finally finds 13 ... Nf4 14. Nf3 Nxg2 ... at depth 34 (eval -0.20, which becomes -0.56 at depth 35).

depth=35
-0.56 13...Nf4 14.Ne4 Ng6 15.Rxe7 Qxe7 16.Be3 Bxe4 17.dxe4 c6 18.Qg4 Rfe8 19.Qf5 Ne5 20.f3 Qf6 21.Qxf6 gxf6 22.Kf2 Kg7 23.h4 h5 24.Bb6 Rab8 25.Bc7 Rb7 26.Ba5 Rd7 27.a4 Ng6 28.Bc3 Nxh4 29.axb5 axb5 30.Ra6

Komodo 13.2 (again after Nxe5 Nxe5; Rxe5) finds it at depths in the 20s, but first likes 14... Nxh3, before switching to 14... Nxg2.


It looks like this is not so easy for engines in general to find in the position after 11 moves.

[Werewolf]

Very strange.

At first I thought this was a pruning issue by SF, but all the alpha-betas struggle here. I even went back to Zappa Mexico II and it couldn't find it either!

Lc0 had no trouble though

[jp]

Lc0 had no trouble though

Please post details.

[Werewolf]

Lc0 had no trouble though

Please post details.

Lc0 Test 60 from a week ago. Avoids 12.Ne5 and if Ne5 is played it sees the line for black within a second:


12... Nxe5 13. Rxe5 Nf4 14. Nf3 Nxg2 15. Kxg2 a5 16. Rxe7 Qxe7 17. a4 Ra6 18.
Kf1 Rf6 19. Ng5 h6 20. Ne4 Bxe4 21. dxe4 Qxe4 22. Qd5 Qh4 23. Qg2 Qd4 24. Ke2
Rd6 25. Be3 Qxb2 26. Ra2 Qe5 27. Qf3 b4 28. Qf4 Qh5+ 29. Qf3 Qe5 30. Qf4 Qc3
31. Qc4 Qf6 32. Qf4 Qc3 33. Qc4 Qf6 34. Qf4 Qg6 35. Qg4 Qf6 36. Qf4 {(0:00:08)
552kN}{[%eval -34,22,Lc0 Test 60 March 2020][%meval 8s]} *

[jp]

{[%eval -34,22,Lc0 Test 60 March 2020][%meval 8s]} *

Thanks. What does this eval mean?

[Werewolf]

I’m not sure. It’s cut & paste from Aquarium and it might be a graphical error.

After 1 second Lc0 showed about-0.4 and after 10 seconds
-0.54 IIRC

[jp]

Back to Komodo 13.2. If 12.Nxe5 is on the board:

depth=26
-0.45 12...Nxe5 13.Rxe5 Nf4 14.Nf3 Nxh3+ 15.gxh3 c5 16.Be3 Rad8 17.Ng5 c4 18.Qh5 Bxg5 19.Rxg5 f6 20.dxc4 fxg5 21.Qg4 Qxg4+ 22.hxg4 bxc4 23.Bxc4+ Kh8 24.Be2 h6 25.c4 a5 26.Re1 Kg8 27.c5 Rf6 28.Kh2 Ba6 29.Bxa6 Rxa6 30.Kg3 Rf6
depth=27
-0.11 12...Nxe5 13.Rxe5 Nf4 14.Nf3 Nxh3+ 15.gxh3 c5 16.Bf4 Bd6 17.Re4 Bxf4 18.Rxf4 Qxh3 19.Qe2 c4 20.dxc4 Rae8 21.Qf1 Qh6 22.Rh4 Qg6+ 23.Qg2 Bxf3 24.Qxg6 hxg6 25.cxb5 axb5 26.Rh3 Bg4 27.Re3 Bf5 28.Rxe8 Rxe8 29.a4 bxa4 30.Rxa4 Re1+ 31.Kg2 Rc1 32.Ra7
depth=28
-0.45 12...Nxe5 13.Rxe5 Nf4 14.Ne4 Ng6 15.Rxe7 Qxe7 16.Be3 Bxe4 17.dxe4 c6 18.Qg4 Rfe8 19.Qf5 Ne5 20.a4 Nc4 21.Bxc4 bxc4 22.f3 Rad8 23.Qa5 Qe5 24.Qb4 Re6 25.Qxc4 Qxb2 26.Rf1 Red6 27.f4 Rd1 28.Rxd1 Rxd1+


Between depth 27 & depth 28, it's decided that 14.Ne4 is better for White, so you cannot see from that if after 14.Nf3 it's switched to Nxg2+; but if you put 14.Nf3 on the board:
depth=23
-0.57 14...Nxg2 15.Kxg2 a5 16.c3 Ra6 17.d4 Rg6+ 18.Kh2 Rf6 19.Rxe7 Qxe7 20.Qe1 Qd6+ 21.Ne5 Rg6 22.Qf1 a4 23.Bc2 Rg2+ 24.Qxg2 Bxg2 25.Kxg2 f6 26.Nf3 Re8 27.Bd3 Qd5 28.Bf4 c6 29.Kg3
depth=24
-0.73 14...Nxg2 15.Kxg2 a5 16.c3 Ra6 17.d4 Rg6+ 18.Kh2 Bd6 19.a4 Qf5 20.Bc2 Qf6 21.Bxg6 fxg6 22.Bg5 Qf5 23.Bh4 Bxf3 24.Qb3+ Kh8 25.Bg3 Bxe5 26.dxe5 bxa4 27.Qxa4 Bd5 28.Qd1 Be6 29.Qf1 Qc2 30.Rxa5 Qxb2 31.Ra6 Bd5


So maybe Komodo 13.2 is doing okay. (It'd need checking whether it stably rejects 12.Nxe5 at the start.)

[jp]

Maybe the difficulty is because after 14... Nxg2 15.Kxg2

[d]r4rk1/1bpqbppp/p7/1p2R3/8/1B1P1N1P/PPP2PK1/R1BQ4 b - - 0 15

15..a5, allowing the rook lift, is the only move, so at the start you need to see all of ... Nf4; ... Nxg2; ... a5; ... Ra6.

SF10:

depth=31
-0.78 15...a5 16.c3 Ra6 17.d4 Rg6+ 18.Kh2 Rf6 19.d5 Bd6 20.Kg2 Rxf3 21.Qxf3 Bxe5 22.a4 c6 23.Be3 cxd5 24.Bd4 Bxd4 25.cxd4 Rd8 26.Bc2 b4 27.Re1 g6 28.Bb3 Kg7 29.Qg4 Qd6 30.Qg5 Bc8 31.Qe7 Bf5 32.Qxd6 Rxd6 33.Rc1 h6 34.Rc5
+2.04 15...Bf6 16.Rh5 g6 17.Rc5 Be7 18.Re5 Bf6 19.Re3 c5 20.c3 Rad8 21.Qe2 Rde8 22.a4 Bg5 23.Rxe8 Rxe8 24.Be3 Bf4 25.axb5 Re5 26.Bd1 Rg5+ 27.Kf1 Qxh3+ 28.Ke1 Bxf3 29.Qxf3 Qxf3 30.Bxf3 Rg1+ 31.Ke2 Rxa1 32.Bxf4 axb5 33.Bd5 Ra6 34.Kd2

[kiroje]

Xiphos 0.6 no popcount

After Nxe5

Code: Select all

36.04 12...Nxe5 (depth 44), 8,8G nodes (4,1M nps)

7.12: +0.38/39 12...Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bc6 19.c3 Bd6 20.a4 Rd8 21.axb5 axb5 22.Ra6 Bb7 23.Ra7 Bc6 24.Bc2 Rfe8 25.Bd3 h6 26.Rda1 Be5 27.Bf1 Bd7 28.Rd1 Bc6 29.Rxd8 Rxd8 30.Be2 Bd6 31.Ra1 Rb8
7.50: +0.36/40 12...Nxe5 13.Rxe5 Nf6 14.Re1 Rae8 15.Ne4 Nxe4 16.dxe4 Qxd1 17.Rxd1 Bxe4 18.Be3 Bc6 19.a4 Rd8 20.axb5 axb5 21.Bf4 Rxd1+ 22.Rxd1 Rd8 23.Rxd8+ Bxd8 24.f3 g6 25.c3 Kg7 26.Kf2 Bd7 27.g4 c6 28.Be5+ f6 29.Bd4 Be7 30.Be3 Bd6 31.Kg2 c5 32.Bd5
20.58: -0.73/41 12...Nxe5 13.Rxe5 Nf4 14.Nf3 Nxg2 15.Kxg2 a5 16.c3 Ra6 17.a4 Rg6+ 18.Kh2 Bd6 19.d4 Bxe5+ 20.dxe5 Qf5 21.Bc2 Qh5 22.Bf4 Bxf3 23.Bxg6 hxg6 24.Qg1 bxa4 25.Rxa4 Qf5 26.Qg3 Bb7 27.Rxa5 Qb1 28.Qg1 Qxb2 29.Rc5 Qb6 30.Be3 Ba8 31.Qd1 Qb7 32.f3 Re8 33.Kg2 Qa6 34.Bd4 Bc6 35.Kh2 Ra8 36.Kg3 Qb7 37.Be3
27.38: -0.38/42 12...Nxe5 13.Rxe5 Nf4 14.Qg4 Qxg4 15.hxg4 Bd6 16.Re3 Nxg2 17.Re2 Nh4 18.Ne4 Nf3+ 19.Kf1 Nh2+ 20.Kg2 Nxg4 21.f3 Ne5 22.Bf4 Ng6 23.Bxd6 cxd6 24.Kg3 Rfd8 25.a4 bxa4 26.Rxa4 h5 27.Kf2 Rac8 28.Rd4 Rc6 29.Re1 Rb6 30.Nc5 Bc8 31.Na4 Rc6 32.Nc3 h4 33.Rde4 Bf5 34.Re8+ Rxe8 35.Rxe8+ Nf8
31.22: -0.37/43 12...Nxe5 13.Rxe5 Nf4 14.Qg4 Qxg4 15.hxg4 Bd6 16.Re1 Nxg2 17.Re2 Nh4 18.Ne4 Nf3+ 19.Kf1 Nh2+ 20.Kg2 Nxg4 21.f3 Ne5 22.Bf4 a5 23.a4 bxa4 24.Bxa4 Ra6 25.Kg3 Nxf3 26.Bxd6 cxd6 27.Kxf3 f5 28.Bb3+ Kh8 29.Ke3 fxe4 30.dxe4 Re8 31.Ra4 h6 32.Rf2 Kh7 33.Rf5 Re7 34.Bd5 g6 35.Bxb7 Rxb7 36.Rfxa5 Rxa5 37.Rxa5 Rxb2 38.Ra6
36.04: -0.43/44 12...Nxe5 13.Rxe5 Nf4 14.Qg4 Qxg4 15.hxg4 Bd6 16.Re1 Nxg2 17.Re2 Nf4 18.Re1 Bb4 19.Kf1 Kh8 20.a3 Ba5 21.Re5 Ng6 22.Rh5 Rae8 23.Ne4 Bxe4 24.dxe4 Rxe4 25.Be3 Bb6 26.Bxb6 cxb6 27.f3 Re7 28.a4 bxa4 29.Rxa4 Ne5 30.Kf2 a5 31.g5 Ng6 32.Bc4 Rd8 33.Bd3 Kg8 34.Rh1 f6 35.gxf6 gxf6 36.Re4 Rxe4 37.Bxe4 Kg7 38.Ke3 Rc8