Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Delayed_Alapin
Moves: 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 e6 5. e5 dxe5 6. Nxe5 Bd6 7. Bb5+ Nbd7 8.
d4 O-O 9. Nxd7 Nxd7 10. Be3 cxd4 11. Qxd4 Bc5 12. Qd1 Bxe3 13. fxe3 a6 14. Bd3
Qh4+ 15. g3 Qh3 16. Nd2 Nc5 17. Be2 Qg2 18. Bf3 *
Position (FEN): r1b2rk1/1p3ppp/p3p3/2n5/8/2P1PBP1/PP1N2qP/R2QK2R b KQ - 6 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 897
Best move: Nd3#