Game analysis (Lichess, ~1600 ELO)

This is a correspondence game that I played on Lichess where I was able to quickly win an early pawn and keep this advantage until I was able to reach a superior endgame. Since it is a game that was not decided by neither my blunders nor my opponents, I decided to try to analyze it.

I'm not that good at analyzing games, so if you think there's something I should improve feel free to point it out.

[pgn][White "???"] [Black "pauix"] [TimeControl "-"] [Date "2017.06.13"] [Result "0-1"] [Termination "Normal"] [Site "https://lichess.org/v88zLPt7"] [Event "Rated Correspondence game"] [Round "-"] [UTCDate "2017.06.17"] [UTCTime "09:36:29"] [Variant "Standard"] [ECO "C77"] [Opening "Ruy Lopez: Morphy Defense, Mackenzie Variation"] [Annotator "https://lichess.org/@/pauix"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 { The Mackenzie variation. I'm not very familiar with the Ruy López so this variation got me out of preparation. } 5... Nxe4 { 5... dxe4 is the main line, but this move seemed playable too. } (5... exd4) 6. Be3? { White loses the e pawn without any compensation. Castling was a more natural move. } (6. O-O b5 7. Bb3 d5 $10) 6... exd4 7. Nxd4 Nxd4 8. Qxd4 Nf6 { After trading down, I have one pawn more than my opponent. } 9. O-O Be7 10. Nd2 O-O 11. c4 c5?! { His centralized queen was strong so I wanted to kick it away. In hindsight, this move leaves a weak pawn on d7. } 12. Qd3 b6 13. Bc2 d5!? { Realizing my previous mistake I decided to push the d pawn forward. Black has to capture or else d4 leaves black with a strong passed pawn. } 14. cxd5 Qxd5 15. Qxd5?! { Being down a pawn, white should probably have avoided this trade. } 15... Nxd5 16. Rfe1 Bf6 17. Rab1 Bb7 18. Rbd1? { Losing a pawn. } (18. Ne4 Be7 19. Nc3 { And white is fine despite being a pawn down. }) 18... Bxb2 19. Nc4 Nxe3 20. Rxe3 Bd4 21. Re7 Bd5? { Losing a pawn. } (21... b5!? 22. Rxb7 bxc4 { The variation recommended by stockfish. Black has got double passed pawns on the c file, but the opposite color bishops mean white could probably draw this one. }) 22. Nxb6 Rad8 23. Rd7? { White should not trade down. } 23... Rxd7 24. Nxd7 Rd8 { Not the best } 25. Nb6?? { The deciding move. Nxc5 or Ba4 were white's only choices. } (25. Nxc5 Bxc5 26. Bb3 $10 { And white recovers the piece }) (25. Ba4 Bxa2 26. Nxc5 $15 { Black is a pawn up but white can still hold its position. }) 25... Bxa2 26. Na4 Bc4? { Black loses one of his pawns here due to the pin on the bishop. } 27. Nxc5 Bf6 28. Rxd8+ Bxd8 29. Bd3 Bxd3 30. Nxd3 { The dust has settled off and black has an advantageous endgame with an outside passed pawn. However the advantage still has to be converted. } 30... a5 31. Kf1 f5 32. Ke2 Kf7 33. h3 a4 34. Nc1 g5 35. Na2 Ke6 36. Kd3 h5!? { The computer recommends playing Bb6 to threaten the weak pawn on f2, but my plan here was to gain as much space as possible on the kingside, putting pressure on both sides of the board. } 37. g4?? { This move allows black to break through on the kingside. } (37. Kc2 Bf6 38. Nb4 Kd6 39. Kb1 Kc5 40. Nc2 Kc4 $17 { Stockfish's recommendation. Still a lost game for white but black has to work to convert the advantage. }) 37... hxg4 38. hxg4 fxg4 39. Ke4 Bb6 40. f3 g3! { gxf3 is also playable but this is a quicker finish. } 41. Nc3 g2 42. Ne2 { 0-1 White resigns. Black plays 42... a3 and one of the pawns will promote. } 0-1[/pgn]