Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Steinitz_Defense
Moves: 1. e4 Nc6 2. Nf3 e5 3. Bb5 d6 4. O-O Ne7 5. b3 Be6 6. Bb2 a6 7. Be2 Qd7 8. d4
exd4 9. Nxd4 Nxd4 10. Qxd4 O-O-O 11. Qa7 Qc6 12. Nc3 f5 13. b4 fxe4 14. b5 axb5
15. Bxb5 Qb6 *
Position (FEN): 2kr1b1r/Qpp1n1pp/1q1pb3/1B6/4p3/2N5/PBP2PPP/R4RK1 w - - 1 16
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 922
Best move: Qa8#