csb456 vs TT-Rex7

How it swung

The one slip

27.hxg6+ cost 3.8 pawns. ♖e4 would have held it.

That walks into 27...♖xg6: the queen on g5 has to move, and the rook on g3 sits right behind it.

The point: 27...♖g7 28.hxg6+ fxg6 29.♖h4+

The score

1. 1. e4 d5
2. 2. exd5 Qxd5
3. 3. Nc3 Qd8
4. 4. Nf3 Bg4
5. 5. Bc4 e6
6. 6. O-O c6
7. 7. d3 Be7
8. 8. Bf4 Nd7
9. 9. Re1 Ngf6
10. 10. h3 Bh5
11. 11. Ne4 Nxe4
12. 12. dxe4 O-O
13. 13. Bd3 Nb6
14. 14. g3 Bd6
15. 15. Bd2 Qc7
16. 16. e5 Be7
17. 17. Bxh7+ Kxh7
18. 18. Ng5+ Kg6
19. 19. g4 Bxg5
20. 20. gxh5+ Kh6
21. 21. Bxg5+ Kxg5
22. 22. Qg4+ Kh6
23. 23. Re3 Nd5
24. 24. Rg3 Rg8
25. 25. Qg5+ Kh7
26. 26. Re1 g6
27. 27. hxg6+ Rxg6
28. 28. Qh4+ Kg7
29. 29. Rxg6+ fxg6
30. 30. c4 Ne7
31. 31. Qf6+ Kg8
32. 32. Re4 Rf8
33. 33. Qxe6+ Kg7
34. 34. h4 Nf5
35. 35. h5