lumpydumpy1234569 vs Ra17bah

How it swung

The one slip

44.b4 cost 16.0 pawns. ♔xh4 would have held it.

There was a mate threat to answer first. 44...♖h2# mates.

The point: 44...♖e2 45.♗b6 ♖d2 46.♔xg3

The score

1. 1. e4 e5
2. 2. Nc3 Nc6
3. 3. Bc4 Nf6
4. 4. d3 Bc5
5. 5. h3 h6
6. 6. Nge2 a6
7. 7. O-O b5
8. 8. Bb3 O-O
9. 9. Kh1 Na5
10. 10. f4 exf4
11. 11. Bxf4 Nxb3
12. 12. axb3 d5
13. 13. Nxd5 Nxd5
14. 14. exd5 Qxd5
15. 15. Bxc7 Bxh3
16. 16. Nf4 Bxg2+
17. 17. Nxg2 h5
18. 18. Qf3 Qg5
19. 19. Bf4 Qf6
20. 20. c3 h4
21. 21. d4 Be7
22. 22. Be5 Qxf3
23. 23. Rxf3 f6
24. 24. Bc7 Rac8
25. 25. Bb6 g5
26. 26. Rxa6 Kf7
27. 27. Ne3 Rh8
28. 28. Nf5 g4
29. 29. Re3 Bf8
30. 30. Ra7+ Kg6
31. 31. Ne7+ Bxe7
32. 32. Rexe7 g3
33. 33. Rg7+ Kf5
34. 34. Kg2 Rce8
35. 35. Rae7 Ra8
36. 36. Rh7 Rxh7
37. 37. Rxh7 Kg5
38. 38. d5 Ra2
39. 39. Rg7+ Kh5
40. 40. Rh7+ Kg5
41. 41. Be3+ Kg4
42. 42. Rg7+ Kf5
43. 43. Kh3 Rxb2
44. 44. b4 Ke4
45. 45. Bd4 Rh2+
46. 46. Kg4 f5+
47. 47. Kg5 g2
48. 48. d6 g1=Q+
49. 49. Bxg1 Rg2+
50. 50. Kf6 Rd2
51. 51. Re7+ Kd5
52. 52. Bc5 Kc6
53. 53. Rc7+ Kd5
54. 54. d7 Kc4
55. 55. Bd4+ Kb3
56. 56. d8=Q h3
57. 57. Qg8+ Kc2
58. 58. Qg3 h2
59. 59. Qxh2 Rxh2
60. 60. Kxf5 Rh5+
61. 61. Ke4 Rh4+
62. 62. Kd5 Rh5+
63. 63. Kc6 Kb3
64. 64. Kb6 Ka4
65. 65. Ra7+ Kb3
66. 66. Ra5 Kc4
67. 67. Ra8 Rh6+
68. 68. Kb7 Re6
69. 69. Rc8+ Kb3
70. 70. Rc5 Re7+
71. 71. Kb6 Re6+
72. 72. Rc6 Rxc6+
73. 73. Kxc6 Ka4
74. 74. Kb6 Kb3
75. 75. Kxb5 Ka2
76. 76. c4 Ka3
77. 77. Kc5 Kb3
78. 78. b5 Ka4
79. 79. Kb6 Kb4
80. 80. c5 Ka4
81. 81. Be5 Kb4
82. 82. Bd6 Kc4
83. 83. Kc6 Kb4
84. 84. b6 Ka5
85. 85. Kb7 Kb5
86. 86. c6 Ka5
87. 87. Bg3 Kb5
88. 88. c7 Ka5
89. 89. c8=N Kb5
90. 90. Ne7 Kc5
91. 91. Ng6 Kd5
92. 92. Nf4+