C10 French with 3.Nc3: Unusual Black 3rd moves and 3...dxe4 (1.e4 e6 2.d4 d5 3.Nc3 c5)

The game below was played in the 2014 August Grand Seven Fourteen III tournament. As all my hopes of winning this tournament have gone away long ago, I now try to get only a decent score from my remaining games and improve my rating. I remember vaguely that this game was quite difficult for me to play for some reason, especially around move 39 or thereabouts. I was not sure at all of the correct plan that I should follow. I made some really bad moves few moves later but luckily for me, they were not bad enough to lose the game. I have added one mate in three, five, seven, eight and ten puzzle today.

[Event "Grand Seven Fourteen"] [Site "http://www.redhotpawn.com"] [Date "2014.08.11"] [Round "1"] [White "Vierjoki, Timo"] [Black "jmi60"] [Result "1-0"] [ECO "C10"] [WhiteElo "1895"] [BlackElo "1631"] [Annotator "Tactical Analysis 2.10 (5s)"] [PlyCount "113"] [EventDate "2014.??.??"] 1. e4 e6 2. d4 d5 3. Nc3 c5 {C10 French with 3.Nc3: Unusual Black 3rd moves and 3...dxe4 C10 French Defense: Marshall Variation} 4. Be3 (4. Bb5+ Nc6 5. Be3 cxd4 {1-0 (37) Wong,G (1184)-Arnold,M (1155) Perth 2005}) 4... cxd4 5. Qxd4 Nc6 6. Bb5 {-0.49/21} (6. Qa4 $1 $11 {0.25/20}) 6... Bd7 {0.63/22} (6... a6 $1 $15 {-0.49/21} 7. Bxc6+ (7. exd5 axb5 8. dxc6 Qxd4 $15) 7... bxc6) 7. Bxc6 { -0.58/20} (7. Qd2 $1 $14 {0.63/22}) 7... bxc6 $15 8. exd5 {-1.06/18} (8. Qd3 $11 {0.06/19}) 8... cxd5 $17 9. Nf3 {-1.27/17} (9. a4 $15 {-0.69/22}) 9... Nf6 {-0.32/21} (9... Ne7 $1 $17 {-1.27/17}) 10. O-O $15 Qc7 $146 {0.00/21} (10... Bd6 $15 {-0.67/18} 11. Ne5) 11. Ne5 {-1.09/18} (11. Qh4 $11 {0.00/21}) 11... Rc8 $2 {0.45/22 [#]} (11... Bd6 $17 {-1.09/18} 12. Nxd7 Qxd7 13. Rfe1 O-O 14. Bf4 Bxf4 15. Qxf4 Qb7 16. b3 Rac8 17. Qd4 Rc7 18. Re3 Rfc8 19. Rd1 Qb6 20. Qxb6 axb6 21. Rdd3 h6 22. Nb5 Rxc2 23. h3 Rxa2 24. Rc3 Rxc3 25. Rxc3 Ra1+ 26. Kh2 Ne4 27. Rc8+ Kh7 {Wong,G (1184)-Arnold,M (1155) Perth 2005 1-0 (37)}) 12. Nxd7 $14 Nxd7 $2 {1.80/18} (12... Qxd7 $15 {-0.32/22} 13. Qxa7 Bb4) 13. Qxa7 $2 { 0.13/23} (13. Nxd5 $18 {1.80/18} exd5 14. Rae1 (14. Bf4 Qc5 $17)) 13... Qc6 $1 $11 14. Qd4 Nf6 $2 {2.14/19} (14... Be7 $14 {0.33/23}) 15. Bg5 $2 {0.32/22 [#]} (15. a4 $18 {2.14/19}) 15... Be7 $1 $14 16. Rfc1 {0.02/23} (16. Qd3 $16 { 0.75/20}) 16... O-O $11 17. Ne2 {-0.60/21} ({White should try} 17. a4 $14 { 0.68/24}) 17... Bc5 $1 $15 18. Qh4 {-1.56/18} (18. Qd3 $1 $15 {-0.57/23}) 18... Ne4 $17 19. Be3 Bxe3 20. fxe3 Qb6 21. Nd4 Qxb2 {-0.89/23} (21... Rc4 $19 { -1.68/21} 22. Qe1 Qxb2) 22. a4 Qc3 {-0.75/24} ({Better is} 22... Rc4 $1 { -1.50/22 Threatens to win with ...Rxd4.} 23. Qe1 Qb7) 23. Qe1 Qc4 24. a5 Ra8 25. Nb3 {-1.60/20} (25. Qf1 $15 {-0.47/26}) 25... Nc3 $36 {And now ...Ne2+ would win. White is under strong pressure.} 26. Kf2 {-1.95/21} (26. Kh1 $17 { -1.50/25}) 26... Rfc8 {-1.46/23} (26... f5 $19 {-1.95/21 Strongly threatening . ..f4.} 27. Nd2 Qc7) 27. Qf1 {-2.32/21} (27. h3 $17 {-1.46/23}) 27... Qh4+ { -1.39/23} (27... Qg4 $19 {-2.32/21} 28. Nd2 Rc5) 28. Kg1 Qe4 {-1.02/24} (28... e5 $1 $19 {-1.83/19} 29. Qd3 Qb4) 29. Qf2 {-1.50/20} (29. Re1 $142 {-1.02/24}) 29... Qg4 {-1.00/22} (29... e5 $142 {-1.50/20} 30. Rf1 f6) 30. Re1 {-1.87/18} ( 30. Rf1 $17 {-1.00/22 might work better.} Rc7 31. Nd4) 30... Ne4 {-1.10/24} ( 30... e5 $19 {-1.87/18} 31. Qf1 Rc6) 31. Qe2 {-1.73/20} (31. Qf4 $17 {-1.10/24} Qxf4 32. exf4) 31... Qg6 {-0.89/24} (31... Qxe2 $19 {-1.73/20} 32. Rxe2 Ra6) 32. a6 {-1.30/22} (32. Rf1 $142 {-0.89/24}) 32... Nd6 {-0.26/22} (32... Ra7 $17 {-1.30/22}) 33. Rec1 {-0.74/21} (33. Ra2 $11 {-0.26/22}) 33... Nc4 {-0.04/23} ( 33... h6 $17 {-0.74/21}) 34. Nd2 $11 Ne5 35. e4 d4 {0.59/21} (35... Qf6 $1 $15 {-0.48/20}) 36. Nf3 {-0.09/23} (36. Rcb1 $1 $14 {0.59/21}) 36... Nxf3+ 37. Qxf3 Rc3 {0.86/20} (37... h6 $11 {-0.29/26 remains equal.}) 38. Qf4 $16 Re3 $2 { 4.60/23} (38... Qf6 $16 {0.79/25} 39. Qxf6 gxf6) 39. Re1 $2 {0.00/26} ({ White should play} 39. a7 $18 {4.60/23 Qb8+ would kill now.} h5 40. Rcb1 Rxe4 41. Rb8+ Kh7 42. Qd2 Rxa7 43. Rxa7) 39... Rc3 $2 {3.08/24} (39... Rxe1+ $11 { 0.00/26} 40. Rxe1 e5 41. Qxe5 Qb6) 40. Ra2 $2 {0.99/26} (40. Reb1 $18 {3.08/24 has better winning chances.} Rcc8 41. a7) 40... Qf6 $2 {3.07/19} (40... h6 $16 {0.99/26 keeps fighting.}) 41. Qxf6 $18 gxf6 {Endgame KRR-KRR} 42. Rb1 $1 Rc7 43. Kf2 $2 {1.12/22} (43. Rb7 $18 {3.12/22 is the precise move to win.} Rcc8 44. a7) 43... Rca7 {1.60/21} (43... Kg7 $142 {1.12/22}) 44. Rb6 $16 Kg7 45. Ke2 e5 {2.19/22} (45... Rc7 {1.63/26 was worth a try.} 46. Kd3 Rc3+ 47. Kd2 (47. Kxd4 $2 Rac8 $19) 47... Rc7) 46. Kd3 Rc8 {2.82/22} (46... Rc7 $16 {1.57/23 is a better defense.} 47. Ra3 Rac8) 47. Rb7 $18 Raa8 48. a7 Rc3+ {5.56/21} (48... h6 $142 {3.97/26} 49. Ra4 Kg6) 49. Kd2 Rcc8 50. Ra3 Rd8 51. Kd3 Rdc8 {4.95/24} (51... h5 $142 {3.48/24} 52. c4 dxc3+ 53. Kxc3 h4) 52. c3 dxc3 53. Rxc3 Rd8+ 54. Ke3 Rf8 55. Rcc7 h6 56. Kd3 Kg6 57. Kc4 {Accuracy: White = 31%, Black = 22%.} 1-0