zfletcherchess vs Donism

How it swung

The one slip

23.♗xf5 cost 2.8 pawns. ♕h6+ would have held it.

The position went from winning to better.

The point: 23...♔g8 24.♕e6+ ♔h8 25.♘xd7

The score

1. 1. d4 d5
2. 2. c4 e6
3. 3. Nf3 h6
4. 4. Nc3 Nf6
5. 5. Bf4 a6
6. 6. e3 Be7
7. 7. Bd3 O-O
8. 8. O-O b6
9. 9. cxd5 exd5
10. 10. h3 c5
11. 11. Ne5 Bb7
12. 12. Qf3 c4
13. 13. Bxc4 b5
14. 14. Bd3 Nbd7
15. 15. Rac1 Rc8
16. 16. Ne2 Ne4
17. 17. Rcd1 Bb4
18. 18. Qg4 f5
19. 19. Qh5 Nd2
20. 20. Bxh6 Nxf1
21. 21. Bxg7 Kxg7
22. 22. Qg6+ Kh8
23. 23. Bxf5 Rxf5
24. 24. Qxf5 Nxe5
25. 25. Qxe5+ Kg8
26. 26. Kxf1 Rc2
27. 27. Nf4 Bd6
28. 28. Qe6+ Kg7
29. 29. Qg6+ Kh8
30. 30. Qxc2 a5
31. 31. Qg6 b4
32. 32. Ne6 Ba6+
33. 33. Kg1 Qe7
34. 34. Qh6+ Kg8
35. 35. Qg6+ Kh8
36. 36. Ng5 Qg7
37. 37. Nf7+ Kg8
38. 38. Qxg7+ Kxg7
39. 39. Nxd6 Be2
40. 40. Rc1 a4
41. 41. Rc7+ Kg6
42. 42. Rb7 b3
43. 43. axb3 axb3
44. 44. Rxb3 Bd1
45. 45. Rb6 Kg7
46. 46. Nb5 Bb3
47. 47. Nc3 Bc4
48. 48. g3 Kf7
49. 49. h4 Kg7
50. 50. Na4 Kf7
51. 51. b3 Bd3
52. 52. Rd6 Be4
53. 53. Nc5 Bf3
54. 54. b4 Ke7
55. 55. Rh6 Kf7
56. 56. b5 Kg7
57. 57. Rd6 Kf7
58. 58. b6 Ke7
59. 59. Rh6 Kd8
60. 60. b7 Kc7
61. 61. Rh8 Kd6
62. 62. b8=Q+ Ke7
63. 63. Re8+ Kf7
64. 64. Qd8 Kg7
65. 65. Qd7+ Kg6
66. 66. Rg8+ Kh6
67. 67. Qd6+ Kh5
68. 68. Qe6 Be4
69. 69. Rg5#