sam_ogle2001 vs soyrudyalejo

How it swung

The one slip

21.♘xf8 cost 3.6 pawns. ♗c1 would have held it.

That did nothing about the bishop on b2, hanging before the move and hanging after. 21...♖xb2 takes it.

The point: 21...♖xc1 22.♖xc1 ♘f4 23.g3

The score

1. 1. e4 d5
2. 2. exd5 Nf6
3. 3. Nf3 Nxd5
4. 4. Bc4 c6
5. 5. O-O Bg4
6. 6. d3 e6
7. 7. Nbd2 Be7
8. 8. h3 Bh5
9. 9. b3 O-O
10. 10. Bb2 Nd7
11. 11. Qe1 Bf6
12. 12. d4 N7b6
13. 13. Bxd5 cxd5
14. 14. Ne5 Rc8
15. 15. c4 dxc4
16. 16. Nexc4 Nd5
17. 17. Ne4 Bg6
18. 18. Nxf6+ Qxf6
19. 19. Ne5 Rc2
20. 20. Nd7 Qg5
21. 21. Nxf8 Kxf8
22. 22. Ba3+ Kg8
23. 23. Rc1 Rxc1
24. 24. Qxc1 Qxc1
25. 25. Rxc1 h6
26. 26. g3 Be4
27. 27. Rc8+ Kh7
28. 28. Bc5 a6
29. 29. Rb8 Nc3
30. 30. a3 Nb5
31. 31. a4 Nc3
32. 32. h4 Kg6
33. 33. Be7 Bd5
34. 34. a5 Ne2+
35. 35. Kf1 Nxd4
36. 36. b4 Nc6
37. 37. Rxb7 Nxe7
38. 38. Rxe7 Kf6
39. 39. Ra7 g5
40. 40. Ke1 g4
41. 41. Rxa6 h5
42. 42. Rd6 Ke7
43. 43. Rb6 Kd7
44. 44. Rb5 Kc6
45. 45. Rc5+ Kb7
46. 46. Kd2 f5
47. 47. Ke3 Be4
48. 48. Kd4 Bf3
49. 49. Ke5 Bd5
50. 50. Kf4 Ka6
51. 51. Kg5 Kb7
52. 52. Kxh5 Ka6
53. 53. Kg5 Bc6
54. 54. Rxc6+ Kb5
55. 55. Rxe6 f4
56. 56. Kxf4 Kxb4
57. 57. Kxg4 Kxa5
58. 58. h5 Kb5
59. 59. h6 Kc5
60. 60. h7 Kd5
61. 61. Rf6 Ke5
62. 62. Rf5+ Ke6
63. 63. h8=Q Ke7
64. 64. Qg7+ Ke8
65. 65. Rf8#