Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Delayed_Alapin
Moves: 1. e4 c5 2. Nf3 d6 3. c3 Nc6 4. d4 cxd4 5. cxd4 e6 6. Bb5 Nf6 7. Nc3 a6 8. Ba4
b5 9. Bb3 b4 10. e5 dxe5 11. dxe5 Nd5 12. Nxd5 exd5 13. Bxd5 Bb7 14. Ng5 Qc7
15. Bxf7+ Ke7 16. e6 Nd8 17. Qg4 h6 18. Qxb4+ Qd6 19. Qc3 hxg5 *
Position (FEN): r2n1b1r/1b2kBp1/p2qP3/6p1/8/2Q5/PP3PPP/R1B1K2R w KQ - 0 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 824
Best move: Bxg5#