Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nxe5 Nf6 6. d3 Bd6 7. Nc4 Be6 8.
Nxd6+ cxd6 9. O-O Qb6 10. Nc3 d5 11. e5 Nd7 12. Re1 O-O 13. Qf3 d4 14. Na4 Qb4
15. b3 *
Position (FEN): r4rk1/1p1n1ppp/p1p1b3/4P3/Nq1p4/1P1P1Q2/P1P2PPP/R1B1R1K1 b - - 0 15
Black to move.
Themes: Hanging Piece, Kingside Attack Middlegame Mate in 1 
Puzzle rating: 529
Best move: Qxe1#