Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c3 d6 3. Nd2 Bf5 4. f3 e5 5. dxe5 dxe5 6. e4 Be6 7. Bc4 Bxc4 8.
Nxc4 Qxd1+ 9. Kxd1 Nbd7 10. Kc2 b5 11. Na5 Bc5 12. b4 Bb6 13. Nc6 O-O 14. a4 a6
15. a5 Bxg1 16. Rxg1 Ne8 17. Rd1 Nd6 18. Be3 Rfe8 19. Re1 Nc4 20. Bf2 Nf8 21.
Rad1 Ng6 22. g3 f6 23. Rd7 Rac8 24. h4 Nf8 25. Rd5 Re6 26. Na7 Rce8 27. Bc5 c6
28. Rd3 Ng6 29. Red1 Nh8 30. g4 Nf7 31. Rd7 g5 32. h5 h6 33. Rc7 Rd8 34. Nxc6
Rxd1 35. Kxd1 Nfd6 36. Ne7+ Kf8 37. Ng6+ Ke8 38. Bxd6 Rxd6+ 39. Kc2 Rd2+ 40.
Kb3 *
Position (FEN): 4k3/2R5/p4pNp/Pp2p1pP/1Pn1P1P1/1KP2P2/3r4/8 b - - 3 40
Black to move.
Themes:  Endgame Hook Mate, Mate in 1 
Puzzle rating: 776
Best move: Rb2#