Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 d5 5. exd5 Qxd5 6. cxd4 Be6 7. Nc3 Qa5 8.
Bd2 O-O-O 9. Be2 Nxd4 10. Nxd4 Rxd4 11. Nb5 Rxd2 12. Qxd2 Bb4 13. Nc3 Nf6 14.
Bf3 Bc4 15. a3 Re8+ 16. Kd1 Rd8 17. Bxb7+ Kxb7 18. Qxd8 Bxc3 19. bxc3 Qxc3 20.
Rb1+ Bb3+ 21. Ke2 Qe5+ 22. Kf1 Qb5+ 23. Ke1 Qe5+ 24. Kf1 Qb5+ 25. Kg1 a5 26.
Qd4 a4 27. Qb4 Qxb4 28. axb4 Kc6 29. f3 Kb5 30. Kf2 Kxb4 31. Rhd1 c5 32. Rd6 c4
33. Ke3 Kc3 34. Rd2 a3 35. Rc1+ Kb4 36. Kd4 a2 37. g4 Ne8 38. Rb2 Ka3 39. Kc3
Nd6 40. Rd2 *
Position (FEN): 8/5ppp/3n4/8/2p3P1/kbK2P2/p2R3P/2R5 b - - 6 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 926
Best move: Nb5#