A high level engine game with human analysis:)
Komodo 1121.05 - Stockfish 151013
I am not a computer expert at all. So, when asked to annotate this game, I focused on the turning points seen from a human perspective. This does innevitable focus on the illogical moments.
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. c3 O-O 6. O-O d6 7. Nbd2 a5 8. Re1
You could quite easily imagine that this position had occured in a game between two top grandmasters. But as human's think in plans (read sequences), while computers simply calculate on each move independently.
8... Ng4 9. Re2 Nf6
This does not work. Remarkably Stockfish had this intention on the previous move. [9... f5!? would be a very human approach, making sense of the previous move. My laptop is suggesting a somewhat unreliable idea:] [9... Nxf2 10. Rxf2 Bxf2+ 11. Kxf2 Ne7, where it says Black is better. It is nonsense. If anything, White is better.]
10. h3 h6 11. Nf1 Bb6 12. Ng3 Bd7 13. a4 Ne7 14. d4 Bxb5 15. axb5 Ng6 16. Qc2 Re8
Despite its slightly odd move, Black is still more or less ok out of the opening.
17. Be3 exd4 18. cxd4 Qd7
19. Qd3 d5
20. e5 Ne4
The two machines are different about the evaluation here and it seems that Komodo is right. White is a bit better, the position is not equal. But I believe that with accurate play Black should have equalised some way.
This is entirely mysterious, but it makes the white pieces work better together. It also tricks Black into thinking it can take on g3 without repurcussions, though computers are not known for setting psychological traps.. .
Later on Black will suffer deeply for the opening of the f-file. I would recommend [21... Ne7!? as a possible improvement.]
22. fxg3 Nf8 23. Nh4 Nh7 24. Kh2 f6
A weakening move, but long term there is pressure down the f-file anyway.
25. Ng6 Qf7?
This looks like the decisive moment to me. Black was probably not in any significant trouble after [25... fxe5 26. dxe5 (26. Nxe5 Qe7) 26... Bxe3 27. Rxe3 White has a slight advantage , though White has a slight plus.]
26. Ra1 Ng5 27. exf6 Ne4
Black has to accept a bad pawn
structure. [27... Qxf6 does not work. 28. Bxg5 Qxg5 29. Re5! Rxe5 30. dxe5 Re8 31. Rf1 is very unpleasant for Black.
Actually he is in great need of a move.]
28. Ne7+ Kh8 29. Bd2!
This move is hard to understand, and this is when the computer impress me. It is all about coordination. The bishop would be in the way on f4.
29... gxf6 30. Nf5
White has a moderate advantage Also without computers we would probably think that White has a big advantage here. The knight is very strong on f5 and the black kingside is wrecked.
30... h5 31. Rf1 Qh7 32. Rf4 c6 33. Qf3 Ng5 34. Rxe8+ Rxe8 35. Qd1 Bc7 36. Rh4 Kg8 37. Bf4!
This is computers as we know them. A deep combination where material is won back much later. For a human this would be unnecessarily risky; for Komodo it is core nature. [37. Bxg5 fxg5 38. Qxh5 Qxh5 39. Rxh5 was also very promising.]
37... Qxf5 38. Qxh5 Ra8 39. b6 Bxf4 40. gxf4 Qh7 41. Qg4!
[41. fxg5 Qxh5 42. Rxh5 fxg5 43. Rxg5+ Kf7 should not be a serious problem for Black.]
41... Qe4 42. Qg3 Qxd4 43. Rh6!?
[43. fxg5 Qe5 44. gxf6+ Qxg3+ 45. Kxg3 Re8 46. Kf3 c5 47. g4 d4 48. g5 d3 49. g6 Rf8 50. Rf4]
[43... Re8 44. fxg5 f5 45. g6 with the idea Rh7 also looks good for White.]
44. h4 Qe4 45. fxg5 Qe5 46. Rg6+ Kh7 47. Qxe5 fxe5 48. Rd6 e4
[48... Kg8 49. Rd7 Rf7 is an interesting defensive try, but White can play: 50. Rc7! e4 51. g6 Rf6 52. Rxb7 c5 53. h5 and his passed pawns are too advanced for Black to deal with.]
49. Rd7+ Kg6
[49... Kg8 50. Rxb7 e3 51. Re7 Rb8 52. Rxe3 Rxb6 53. h5 also looks winning for White. One of the ideas is that 53... Rxb2 will lose to 54. Re8+ Kf7 (54... Kh7) 55. Rc8.]
White comes with a beautiful mating attack.
50... Kf5 51. Rxb7 d4 52. Rc7 e3 53. Re7 Rb8
[53... Rd8 54. b7 d3 55. Rxe3 d2 56. Rf3+ Kg6 57. Rf1 does also not offer Black sufficient counterplay to save the game.]
White is threatening to mate the black king with 55.g4+ Kg6 56.b7 (to play b8=Q later on) 56...c5 57.Kf4. Here Black is forced to play 57...Rf8+ 58.Kg3 Rb8, when 59.h5+ Kxg5 60. Re6! wins. So Stockfish delays the inevitable, but nothing more.
[54... c5 55. g4+ Kg6 56. b7 c4 57. Kf4 Rf8+ 58. Kg3 Rb8 59. h5+ Kxg5 60. Re6]
55. g4+ Kg6 56. Rxe2 Rxb6 57. Re6+ Kf7 58. Rd6 Ke7 59. Rxd4 Rxb2 60. h5 Rb8 61. g6 Ra8 62. h6 1-0
Game annotated by GM Jakob Aagaard