Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 e6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 Bb4 6. f3 Nc6 7. Nxc6 bxc6 8.
Bg5 h6 9. Bh4 a5 10. a3 Bxc3+ 11. bxc3 g5 12. Bf2 Ba6 13. Bxa6 Rxa6 14. Qd6 Qe7
15. Bc5 Qxd6 16. Bxd6 g4 17. O-O-O gxf3 18. gxf3 Rg8 19. Rhg1 c5 20. e5 Rxg1
21. Rxg1 Nd5 *
Position (FEN): 4k3/3p1p2/r2Bp2p/p1pnP3/8/P1P2P2/2P4P/2K3R1 w - - 1 22
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 711
Best move: Rg8#