Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 Qh4 7. Be3 Bb4 8. Qd2
Qxg4 9. Rg1 Qh5 10. O-O-O h6 11. Nf4 Qxh2 12. Be2 Be4 13. f3 g5 14. Rh1 Qg3 15.
Rdg1 gxf4 16. Rxg3 fxg3 17. fxe4 Ne7 18. Qe1 g2 19. Rxh6 Rxh6 20. Bxh6 dxe4 21.
Qg3 Nd7 22. Qxg2 O-O-O 23. Nxe4 Nf5 24. Bg5 Rg8 25. c3 Be7 26. Qg4 Rg6 27. Qh5
Kc7 28. Bxe7 Nxe7 29. Bd3 Rg1+ 30. Kc2 Nd5 31. Nd6 Ne3+ 32. Kb3 Rg2 33. Qxf7
Nd1 34. Bc2 Ne3 35. Bd3 Nd1 36. Nc4 b5 37. Na5 Rxb2+ 38. Ka3 b4+ 39. cxb4 Rd2
40. Qxe6 Rxd3+ 41. Ka4 *
Position (FEN): 8/p1kn4/2p1Q3/N3P3/KP1P4/3r4/P7/3n4 b - - 1 41
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1192
Best move: Nb6#