Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. f4 d5 3. exd5 exf4 4. Nf3 Nf6 5. c4 c6 6. dxc6 Nxc6 7. b3 Nd4 8.
Bb2 Qe7+ 9. Be2 Nxf3+ 10. gxf3 Bf5 11. d4 O-O-O 12. Nc3 Qe3 13. Qd2 Qxd2+ 14.
Kxd2 Rxd4+ 15. Ke1 Rd7 16. Rd1 Rxd1+ 17. Nxd1 Bb4+ 18. Kf2 Rd8 19. Bxf6 gxf6
20. a3 Bxa3 21. Nc3 Rd2 22. Ne4 Rb2 23. Nxf6 Rxb3 24. Nd5 Bc5+ 25. Kg2 Rb2 26.
Re1 a5 27. Nxf4 a4 28. Ra1 a3 29. Kf1 a2 30. Kg2 Rb1 31. Rxa2 *
Position (FEN): 2k5/1p3p1p/8/2b2b2/2P2N2/5P2/R3B1KP/1r6 b - - 0 31
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 973
Best move: Rg1#