Chess puzzle (Checkmate)
Opening: Alekhine_Defense, Alekhine_Defense_OSullivan_Gambit
Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 b5 4. Bxb5 c5 5. Bc4 cxd4 6. Nf3 Qa5+ 7. Bd2 Qc5 8.
Na3 Bb7 9. O-O e6 10. b4 Nxb4 11. Bxb4 Qxb4 12. Rb1 Qxa3 13. Rxb7 Nc6 14. Nxd4
Qc3 15. Nxc6 Qxc4 *
Position (FEN): r3kb1r/pR1p1ppp/2N1p3/4P3/2q5/8/P1P2PPP/3Q1RK1 w kq - 0 16
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 609
Best move: Qxd7#