hendricks3203 vs Prince12zx

How it swung

The one slip

18.♘c6 cost 4.2 pawns. dxc5 would have held it.

That put the knight on c6, where the rook on c8 covers it. 18...♖xc6 just takes it.

The point: 18...♕c7 19.♘d7 ♖fe8 20.♗f4

The score

1. 1. c4 Nf6
2. 2. Nf3 d5
3. 3. d4 e6
4. 4. g3 b6
5. 5. Bg2 Bb7
6. 6. O-O dxc4
7. 7. Qc2 Be7
8. 8. Rd1 O-O
9. 9. Qxc4 Bd5
10. 10. Qc2 Nc6
11. 11. Nc3 Nb4
12. 12. Qb1 Bc4
13. 13. a3 Nbd5
14. 14. e4 Nxc3
15. 15. bxc3 c5
16. 16. Bg5 Rc8
17. 17. Ne5 Ba6
18. 18. Nc6 Rxc6
19. 19. e5 Nd5
20. 20. Bxe7 Qxe7
21. 21. Qc2 cxd4
22. 22. Rxd4 Rxc3
23. 23. Qd2 Rfc8
24. 24. Bxd5 exd5
25. 25. Rxd5 Rc2
26. 26. Qd1 Bb7
27. 27. Rd6 Qxe5
28. 28. Rd8+ Qe8
29. 29. Rxe8+ Rxe8
30. 30. Qxc2 g6
31. 31. Qc7 Bf3
32. 32. Qxa7 b5
33. 33. Qc5 Rb8
34. 34. Qc7 Rb7
35. 35. Qd8+ Kg7
36. 36. Qd4+ Kf8
37. 37. Rc1 Rb8
38. 38. Qd6+ Kg7
39. 39. Qxb8 Be2
40. 40. Qe5+ Kh6
41. 41. Qxe2 Kg7
42. 42. Qxb5 Kf6
43. 43. Rc6+ Kg7
44. 44. Qb2+ Kh6
45. 45. Qb8 Kg7
46. 46. Rc8 h5
47. 47. Rg8+ Kf6
48. 48. Qb2+ Kf5
49. 49. Rf8 Ke6
50. 50. Qe2+ Kf6
51. 51. Qf3+ Ke5
52. 52. Rxf7 Kd6
53. 53. Qa8 Ke6
54. 54. Qe8+ Kd6
55. 55. Rd7+ Kc6
56. 56. Qc8+ Kb6
57. 57. Rb7+ Ka6
58. 58. Qa8#