Why is this the Best move if I lose my Rook?

[Event "MCKery vs. wbalance"] [Site "Chess.com"] [Date "2021-01-30"] [White "MCKery"] [Black "wbalance"] [Result "1-0"] [WhiteElo "702"] [BlackElo "757"] [TimeControl "standard"] [Termination "MCKery won on time"] 1. b4 e5 2. a3 d5 3. e3 Qf6 4. Nc3 Be6 5. Qf3 e4 6. Qf4 Bd6 7. Qxf6 Nxf6 8. Nb5 a6 9. Nxd6+ cxd6 10. Bb2 O-O 11. Bxf6 gxf6 12. h3 Nc6 13. g4 Ne5 14. Ne2 Nf3+ 15. Kd1 Rac8 16. Nf4 Rfe8 17. Nh5 Re7 18. Nxf6+ Kg7 19. Nh5+ Kg6 20. Nf4+ Kh6 21. h4 Bxg4 22. Bh3 Be6 23. h5 Rg8 24. Ke2 d4 25. d3 dxe3 26. fxe3 Ng5 27. Rag1 exd3+ 28. cxd3 Rc7 29. Rc1 Rxc1 30. Rxc1 Nxh3 31. Nxh3 Bxh3 32. Rh1 Bg4+ 33. Kf2 Rg5 34. Rg1 f5 35. e4 fxe4 36. dxe4 Kxh5 37. Rh1+ Kg6 38. Rg1 h5 39. Ke3 d5 40. Kf4 dxe4 41. Kxe4 h4 42. Kf4 Kh5 43. Rh1 h3 44. Rh2 Rf5+ 45. Ke4 1-0

Sorry I'm new here

Which move are you asking about? 

It says Rc7 is a mistake and says Nxh3 is best.

There is a little tactic there which means you win 2 pieces for the rook if you go Nxh3 and white replies with Rxg8, white is not able to capture exf4.

Beautiful! Thanks for clearing that up.

👍

HI