Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
O-O 9. O-O-O Qc7 10. g4 b5 11. Bxf6 Bxf6 12. Ndxb5 axb5 13. Nxb5 Qc5 14. e5
Rxa2 15. exf6 Qb4 16. Qb3 *
Position (FEN): 1nb2rk1/5ppp/3ppP2/1N6/1q3PP1/1Q6/rPP4P/2KR1B1R b - - 2 16
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1033
Best move: Ra1#