Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Berlin_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Bxc6 dxc6 7. Rxe5+ Be7
8. Qe2 Be6 9. Nd4 Bd5 10. Nc3 Nc4 11. Nxd5 Nxe5 12. Nxe7 Qxe7 13. d3 c5 14. Nf5
Nf3+ 15. Qxf3 *
Position (FEN): r3k2r/ppp1qppp/8/2p2N2/8/3P1Q2/PPP2PPP/R1B3K1 b kq - 0 15
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 400
Best move: Qe1#