arg17 vs aldric1988

How it swung

The one slip

21.♕h4 cost 7.4 pawns. ♗xe5 would have held it.

That walks into 21...♘f3+: the king on g1 and the queen on h4 are both attacked at once.

The point: 21...♗xe5 22.♖xe5 ♖xe5 23.♕xd4

The score

1. 1. e4 c6
2. 2. Nf3 d5
3. 3. exd5 cxd5
4. 4. Bb5+ Nc6
5. 5. Nc3 e6
6. 6. O-O Nf6
7. 7. Ne5 Bd7
8. 8. a3 Bd6
9. 9. Nxd7 Qxd7
10. 10. Re1 a6
11. 11. Ba4 b5
12. 12. Bb3 O-O
13. 13. d4 Qa7
14. 14. Ne2 Qb8
15. 15. g3 Re8
16. 16. Bg5 Ng4
17. 17. Nf4 e5
18. 18. Nxd5 Nxd4
19. 19. Qxg4 Qb7
20. 20. Bf6 g6
21. 21. Qh4 Nf3+
22. 22. Kg2 Nxh4+
23. 23. gxh4 Be7
24. 24. Bxe5 Bc5
25. 25. Kg1 Be7
26. 26. Nf4 Rad8
27. 27. Bd5 Rxd5
28. 28. Nxd5 Qxd5
29. 29. Rad1 Qc5
30. 30. c3 Bxh4
31. 31. Bd4 Rxe1+
32. 32. Rxe1 Qg5+
33. 33. Kh1 Qd5+
34. 34. Kg1 h5
35. 35. Re8+ Kh7
36. 36. Rh8#