prizefighter vs —

How it swung

The one slip

22.♗a3 cost 1.9 pawns. ♖d1 would have held it.

That walks into 22...♘d2: the rook on f1 and the bishop on c4 are both attacked at once.

The score

1. 1. f4 d5
2. 2. Nf3 e6
3. 3. e3 c5
4. 4. b3 Nc6
5. 5. Bb2 Nf6
6. 6. Be2 Be7
7. 7. O-O O-O
8. 8. Ne5 Nxe5
9. 9. fxe5 Nd7
10. 10. d4 cxd4
11. 11. exd4 f6
12. 12. exf6 Rxf6
13. 13. Nd2 Rxf1+
14. 14. Qxf1 Qf8
15. 15. c4 Qxf1+
16. 16. Rxf1 dxc4
17. 17. Bxc4 Nf6
18. 18. a4 Bd7
19. 19. Nf3 Bd6
20. 20. Ne5 Bxe5
21. 21. dxe5 Ne4
22. 22. Ba3 Nd2
23. 23. Rc1 Nxc4
24. 24. Rxc4 Rc8
25. 25. Rxc8+ Bxc8
26. 26. Bd6 b6
27. 27. b4 a6
28. 28. a5 b5
29. 29. Kf2 Kf7
30. 30. Ke3 Kg6
31. 31. g3 Kf5
32. 32. Kd4 Bb7
33. 33. Kc5 Kg4
34. 34. Kb6 Bc8
35. 35. Kc7 Kh3
36. 36. Kxc8 Kxh2
37. 37. Kd7 Kxg3
38. 38. Kxe6 h5
39. 39. Kf7 h4
40. 40. e6+ Kg2
41. 41. e7 h3
42. 42. e8=Q h2
43. 43. Bxh2