Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 c6 8. Qc2
h6 9. Bh4 Re8 10. Nge2 Nbd7 11. O-O b6 12. Rad1 Bb7 13. Kh1 Rc8 14. f3 c5 15.
Qd2 cxd4 16. exd4 Nh5 17. Bxe7 Qxe7 18. Ng3 Nxg3+ 19. hxg3 Nf6 20. Rfe1 Qd6 21.
Qf2 a6 22. Rxe8+ Rxe8 23. Re1 Rc8 24. Re5 b5 25. g4 b4 26. Ne2 Nd7 27. Rh5 Nf8
28. Qe3 Qe6 29. Qxe6 Nxe6 30. Kg1 a5 31. Kf2 a4 32. Rh1 Kf8 33. Ke3 Re8 34. Kd2
Ke7 35. Rc1 Kd6 36. a3 bxa3 37. bxa3 Bc6 38. Rb1 Kc7 39. Rb4 Rb8 40. Rxb8 Kxb8
41. Kc3 Kc7 42. Kb4 Kb6 43. Bf5 Nc7 44. Nc3 *
Position (FEN): 8/2n2pp1/1kb4p/3p1B2/pK1P2P1/P1N2P2/6P1/8 b - - 7 44
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 765
Best move: Na6#