GM Nepomniacht vs GM Sasikiran

25 September 2010, Khanty-Mansiysk – Here is a game in the fourth round between GM Neponiacht, Russia 2 vs GM Sasikiran, India on board 1 during the chess Olympiad 2010.

[Event "Chess Olympiad 2010, Khanty-Mansiysk"]
[Site "Internet Chess Club"]
[Date "2010.09.25"]
[Round "4"]
[White "*GM_Nepomniacht"]
[Black "*GM_Sasikiran"]
[Result "1-0"]
[PlyCount "107"]
[EventDate "2010.09.24"]
[TimeControl "5400+30"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 Qc8 5. c4 e6 6. Nc3 h6 7. Nge2 Ne7 8. Ng3 Bh7 9. a3 dxc4 10. Bxc4 Nd7 11. Nce4 Nd5 12. O-O Qc7 13. Bd2 N7b6 14. Bb3 Rd8 15.Rc1 Nc8 16. Qg4 Nce7 17. Nd6+ Rxd6 18. exd6 Qxd6 19. Rfe1 Nf6 20. Qf4 Qxf4 21.Bxf4 Kd7 22. Be5 Nfd5 23. Ne4 Nf5 24. Nc5+ Bxc5 25. dxc5 f6 26. Bh2 Nxh4 27.Rc4 Nf5 28. Ra4 Ra8 29. Rd1 h5 30. Rb4 Kc8 31. Re4 Kd7 32. Rb4 Kc8 33. Re4 e5 34. Rd2 a5 35. Ra4 Nd4 36. Bxd5 cxd5 37. f4 Nb3 38. Rxd5 Bg8 39. Rd3 Nxc5 40.Rc3 b6 41. fxe5 Kb7 42. Rd4 f5 43. Rg3 Ne6 44. Rd7+ Ka6 45. Rc3 g5 46. Rd6 Rb8 47. Bg3 Kb5 48. Rb3+ Ka6 49. Rc3 Kb5 50. Bf2 a4 51. b3 Nf4 52. Rc8 Ne2+ 53. Kh2 Rxc8 54. Rxb6+ *

Pix 1. How should black defend this position? Instead black played 52…Ne2+ 53.Kh2 Rxc8 and now mate comes in with 54.Rxb6+ Ka5 55.b4# mate.