Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_OKelly_Variation
Moves: 1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Bd3 O-O 8.
O-O Qc7 9. Be3 Bxc3 10. bxc3 Nc6 11. f4 d5 12. fxe5 Nxe5 13. Bd4 dxe4 14. Be2
Be6 15. Qe1 Rfe8 16. Qg3 Nfd7 17. Nc5 Rac8 18. Nxd7 Nxd7 *
Position (FEN): 2r1r1k1/1pqn1ppp/p3b3/8/3Bp3/2P3Q1/P1P1B1PP/R4RK1 w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 694
Best move: Qxg7#