Minic game at TCEC

[xr_a_y]

In the game (https://tcec-chess.com/#div=sw1&game=366&season=20), Minic won versus Xiphos, in a game where 14. g4 seems to be the key before tripling on the king side and then switching to queen side to sac the exchange of the bishop to create a passed pawn. What do you think of this move ?

[pgn]
[Event "TCEC Season 20 - Swiss 1"]
[Site "https://tcec-chess.com"]
[Date "2021.04.12"]
[Round "10.24"]
[White "Minic 3.04"]
[Black "Xiphos 0.6.1"]
[Result "1-0"]
[Annotator "archive"]

1. d4 d5 2. Nf3 Nf6 3. Bg5 e6 4. e3 Be7 5. Nbd2 Nbd7 6. Bd3 c5 7. c3 O-O 8. O-O b6 9. Ne5 Bb7 10. Qf3 Ne8 11. Qh3 f5 12. Bxe7 Qxe7 13. Nxd7 Qxd7 14. g4 Nd6 15. Nf3 Qe7 16. gxf5 Rf6 17. Ne5 exf5 18. f4 a5 19. Qg2 Rh6 20. Rf3 a4 21. a3 g6 22. Rg3 Rf8 23. Bc2 cxd4 24. cxd4 b5 25. h3 Qe6 26. Kh2 Rc8 27. Rg1 Kg7 28. Rg5 Rc7 29. Qd2 Bc8 30. Bd3 Qe7 31. Rc1 Nc4 32. Bxc4 bxc4 33. Qa5 Be6 34. Qxa4 Ra7 35. Qc2 Rb7 36. Qd2 Qe8 37. Rc3 Qa8 38. Rg2 Rh5 39. Qd1 Kh8 40. a4 Qa5 41. Ra3 Bc8 42. Qf3 Rg7 43. Ra1 Be6 44. Qd1 Rg8 45. Ra2 Rh4 46. b4 Qxb4 47. a5 g5 48. Nf3 Rh6 49. Nxg5 Ra8 50. Rab2 Qf8 51. Rb6 Bg8 52. Rxh6 Qxh6 53. Qb1 Qf8 54. Qb6 Rc8 55. Ne6 Qe7 56. Nc5 Qd8 57. Nd7 Qxb6 58. axb6 Be6 59. b7 Bxd7 60. Ra2 Rg8 61. Ra8 Be6 62. Rxg8+ Bxg8 63. b8=Q Kg7 64. Qc8 c3 65. Qxf5 h5 66. Qe5+ Kf7 67. f5 c2 68. Qc7+ Kf6 69. Qxc2 Bh7 70. Qc6+ Kxf5 71. Qc2+ Ke6 72. Qxh7 Kd6 73. Qh6+ Kd7 74. Kh1 Kc7 75. Qe6 Kb7 76. h4 Kc7 77. Qxd5 Kc8 78. Qf7 Kb8 79. Qd7 Ka8 80. Qc6+ Ka7 81. d5 Kb8 82. d6 Ka7 83. d7 Kb8 84. d8=N Ka7 85. Qb7#
*
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