mbstorrie vs LtyP

How it swung

The one slip

33...♔g5 cost 13.0 pawns. ♖he3+ would have held it.

There was mate on the board here. 33...♖he3+ starts it.

The point: 34.♔f4 g5#

The score

1. 1. e4 c5
2. 2. Nf3 d6
3. 3. Bc4 Nc6
4. 4. c3 g6
5. 5. d4 Nf6
6. 6. dxc5 dxc5
7. 7. e5 Qxd1+
8. 8. Kxd1 Ne4
9. 9. Re1 Nxf2+
10. 10. Ke2 Ne4
11. 11. b4 cxb4
12. 12. cxb4 Nxb4
13. 13. Ba3 e6
14. 14. Bxb4 Bxb4
15. 15. Rc1 Nc5
16. 16. a3 Ba5
17. 17. Bb5+ Ke7
18. 18. Rxc5 Bb6
19. 19. Rc4 Bd7
20. 20. Bxd7 Kxd7
21. 21. Nc3 Rhc8
22. 22. Rd1+ Ke7
23. 23. Nd2 Kf8
24. 24. g4 Kg7
25. 25. Na4 Kh6
26. 26. Nxb6 axb6
27. 27. Rdc1 Rd8
28. 28. Ne4 Rxa3
29. 29. Nf6 Ra2+
30. 30. Ke3 Rxh2
31. 31. Rc7 Rh3+
32. 32. Ke4 Rdd3
33. 33. Rxf7 Kg5
34. 34. Nxh7+ Kxg4
35. 35. Rf4+ Kh5
36. 36. Rf6 Ra3
37. 37. Rxe6 Ra4+
38. 38. Kd5 Rd3#