Chess puzzle (Checkmate)
Moves: 1. e3 e5 2. b3 d5 3. Bb2 Bd6 4. Bb5+ c6 5. Bd3 Nf6 6. Nc3 O-O 7. h4 d4 8. Ne4
dxe3 9. dxe3 Nxe4 10. Bxe4 f5 11. Bd3 Qa5+ 12. c3 e4 13. Bc4+ Kh8 14. Qxd6 Rd8
15. Qb4 Qc7 16. Ne2 a5 17. Qa4 b5 18. Bxb5 cxb5 19. Qxb5 Ba6 20. Qxf5 Qd6 21.
Nd4 Bd3 22. Qe6 Qc7 23. h5 Ra6 24. Qg4 h6 25. Qf4 Qd7 26. a4 Rf6 27. Qe5 Qg4
28. Qg3 Qxg3 29. fxg3 Rdf8 30. O-O-O Rf2 31. Rd2 Rxd2 32. Kxd2 Rf2+ 33. Kc1
Rxg2 34. c4 Rxg3 35. Kd2 Rg2+ 36. Kc3 Na6 37. Ba3 Rg3 38. Bc1 Nb4 39. Kb2 Rg2+
40. Kc3 *
Position (FEN): 7k/6p1/7p/p6P/PnPNp3/1PKbP3/6r1/2B4R b - - 11 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1127
Best move: Na2#