veggiemann_chess vs Sarvarovna

How it swung

The one slip

32.a4 cost 7.8 pawns. ♖d7 would have held it.

That did nothing about the rook on d2, hanging before the move and hanging after. 32...♘xd2 takes it.

The point: 32...♘e5 33.♖xa7 b5 34.♔f1

The score

1. 1. d4 e6
2. 2. e4 g6
3. 3. c4 Bg7
4. 4. Nf3 Ne7
5. 5. Nc3 c6
6. 6. e5 O-O
7. 7. Be2 d6
8. 8. O-O dxe5
9. 9. dxe5 Qxd1
10. 10. Rxd1 Nd7
11. 11. Bf4 Nf5
12. 12. Rxd7 Bxd7
13. 13. Ng5 Bh6
14. 14. Nce4 b6
15. 15. Nf6+ Kg7
16. 16. Nxd7 Rad8
17. 17. Nxf8 Rxf8
18. 18. h4 f6
19. 19. exf6+ Kxf6
20. 20. Nxh7+ Kg7
21. 21. Nxf8 Kxf8
22. 22. Bxh6+ Nxh6
23. 23. h5 gxh5
24. 24. Bxh5 Ke7
25. 25. Rd1 Nf5
26. 26. g4 Nd6
27. 27. f4 Nxc4
28. 28. f5 exf5
29. 29. gxf5 Kf6
30. 30. Bg6 Nxb2
31. 31. Rd2 Nc4
32. 32. a4 a5
33. 33. Rc2 Ne5
34. 34. Bh7 Kg7
35. 35. Rg2+ Kxh7
36. 36. f6 Kh6
37. 37. Kf2 Kh5
38. 38. Ke3 Nf7
39. 39. Rg7 Ng5
40. 40. f7 Nxf7
41. 41. Rxf7 c5
42. 42. Rb7 c4
43. 43. Rxb6 c3
44. 44. Kd3 c2
45. 45. Kxc2 Kg5
46. 46. Rb5+ Kf4
47. 47. Rxa5 Ke4
48. 48. Rc5 Kd4
49. 49. Rc8 Kd5
50. 50. a5 Kd6
51. 51. a6 Kd7
52. 52. Rc3 Kd6
53. 53. a7 Kd7
54. 54. a8=Q Ke7
55. 55. Qe4+ Kd6
56. 56. Rd3+ Kc5
57. 57. Kc3 Kb5
58. 58. Qc4+ Kb6
59. 59. Rd6+ Kb7
60. 60. Rc6 Ka7
61. 61. Qb5 Ka8
62. 62. Ra6#