Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Bird_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. d3 a6 6. Ba4 Qe7 7. O-O Nf6 8.
e5 Ng8 9. Re1 Qb4 10. Bb3 Ne7 11. Qf3 *
Position (FEN): r1b1kb1r/1pppnppp/p7/4P3/1q1p4/1B1P1Q2/PPP2PPP/RNB1R1K1 b kq - 6 11
Black to move.
Themes: Hanging Piece, Kingside Attack Opening Mate in 1 
Puzzle rating: 608
Best move: Qxe1#