# The Fastest Way-A Challenge

This is my first “find the fastest way to this position” chess puzzle” here on PSE. However, this is not for just some random position. Let me explain.

Tim Krabbe has said on his site (Journal Entry 387), that the record, at least in 2013 for the most mutual consecutive checks is 54. He says that a proof game was sent to him, but I cannot find the game anywhere. This makes this a special question, because this is not only for a puzzle, but for practical purposes as well.

What is the fastest way to reach this postion?

Alexey Khayhan, Tim Krabbe’s Website 2013, 54 consecutive checks

FEN-5q2/2q1pn1B/R1Q1R3/1B2r1B1/1q1k1Knq/rr5Q/B2NPN1N/3Qb1QQ w - - 01

Far from optimal, I think, but here it is in 84 moves

1. c4 d5
2. cxd5 g5
3. h3 g4
4. b4 g3
5. a4 a5
6. bxa5 Bg4
7. hxg4 f5
8. d4 f4
9. g5 f3
10. gxf3 Ra6
11. f4 Rb6
12. a6 Rb3
13. Rh6 b5
14. Rf6 h5
15. a7 h4
16. a5 h3
17. a6 h2
18. a8=Q h1=Q
19. d6 Qh4
20. Qh1 g2
21. Nf3 c5
22. Qh3 g1=R
23. Nh2 b4
24. a7 Rgg3
25. g6 Nh6
26. a8=B c4
27. Ra6 Ra3
28. Re6 c3
29. Bd5 Nd7
30. Ba2 Ne5
31. f5 b3
32. g7 c2
33. g8=B Neg4
34. f6 Bg7
35. d5 Kd7
36. f7 Qc7
37. f8=Q Qb6
38. Qf3 Ke8
39. Qh1 b2
40. f4 Qc7
41. Bg2 Qb6
42. d7+ Kf8
43. d6 Qc7
44. Bc6 Qb6
45. Kf1 Rgb3
46. Kg2 Qc7
47. Be3 c1=Q
48. Kf3 Qc3
49. f5 Qb6
50. d8=N Qc7
51. Bb5 Qb6
52. Nc6 Ke8
53. f6 Qb4
54. f7+ Kd7
55. f8=Q Qc7
56. Qf4 Nf7
57. Qfg3 Bc3
58. Qgg1 Rh5
59. Bh7 Re5
60. Bg5 Ke8
61. d7+ Kf8
62. Nd4 Kg7
63. d8=Q Qb6
64. Bf6+ Kh6
65. Bg7+ Kg5
66. Kg2 Kf4
67. Kf1 Kg5
68. Qc7 Kf4
69. Bg8 Q6c5
70. Kg2 Ke4
71. Ndf3 Qb6
72. Ne1 Q6c5
73. Nd3 Qb6
74. Qc8 Be1
75. Qf1 Kd4
76. Nd2 b1=Q
77. Nf2 Qd8
78. Qfg1 Ne3+
79. Kf3 Ng4+
80. Kf4 Qf8
81. Bh6 Qc1
82. Bh7 Qcc5
83. Qcc6 Qd6
84. Bg5 Qc7 *