Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Kan_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. a3 d6 6. Nc3 Be7 7. Be3 Nf6 8. f3
h6 9. Qd2 Bd7 10. O-O-O Nc6 11. g4 b5 12. h4 b4 13. axb4 Nxb4 14. h5 Rc8 15. g5
Qa5 16. gxf6 Qa1+ 17. Nb1 *
Position (FEN): 2r1k2r/3bbpp1/p2ppP1p/7P/1n1NP3/4BP2/1PPQ4/qNKR1B1R b k - 2 17
Black to move.
Themes:  Middlegame Mate in 1, Smothered Mate 
Puzzle rating: 1079
Best move: Na2#