Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 d5 5. e5 Bf5 6. Nf3 e6 7. Nc3 Bb4 8. Bb5
a6 9. Ba4 b5 10. Bb3 Na5 11. O-O Nc4 12. Bc2 Bxc2 13. Qxc2 Ne7 14. Ng5 Nf5 15.
Qb3 Nxd4 16. Qxb4 Nc2 17. Qc5 Rc8 18. Qa7 Nxa1 *
Position (FEN): 2rqk2r/Q4ppp/p3p3/1p1pP1N1/2n5/2N5/PP3PPP/n1B2RK1 w k - 0 19
White to move.
Themes: Attacking f2 or f7 Middlegame Mate in 1 
Puzzle rating: 925
Best move: Qxf7#