md443alien_9 vs jotaaa02

How it swung

The one slip

27...♕f6 cost 6.7 pawns. ♕xc5 would have held it.

There was a knight free here. 27...♕xc5 was the move.

The point: 28.h4 c3 29.h5 gxh5

The score

1. 1. e4 e5
2. 2. Qh5 Nc6
3. 3. Bb5 g6
4. 4. Qh3 d6
5. 5. Bxc6+ bxc6
6. 6. Qb3 d5
7. 7. exd5 cxd5
8. 8. Nc3 Ne7
9. 9. Nf3 Bg7
10. 10. O-O Ba6
11. 11. d3 Rb8
12. 12. Qa4+ c6
13. 13. Qxa6 O-O
14. 14. Bg5 Qc7
15. 15. Rae1 Rxb2
16. 16. d4 Rxc2
17. 17. Na4 Rxa2
18. 18. dxe5 c5
19. 19. Ra1 Rxa1
20. 20. Rxa1 Nf5
21. 21. Bf6 Bh6
22. 22. Rc1 c4
23. 23. Bg5 Bg7
24. 24. e6 h6
25. 25. e7 Nxe7
26. 26. Bxe7 Qxe7
27. 27. Nc5 Qf6
28. 28. Qxa7 Qf4
29. 29. Re1 c3
30. 30. Nd7 Rd8
31. 31. Nd4 Bxd4
32. 32. Qb7 Qxf2+
33. 33. Kh1 Qxe1#