Chess puzzle (Checkmate)
Opening: Kings_Indian_Defense, Kings_Indian_Defense_Smyslov_Variation
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5 Nbd7 6. e3 h6 7. Bh4 c5 8. d5
O-O 9. Be2 Nh7 10. Qc2 Ne5 11. O-O Bg4 12. h3 Bxf3 13. gxf3 Qd7 14. Kh2 Bf6 15.
Bg3 Ng5 16. Kg2 Qxh3+ 17. Kg1 Ngxf3+ 18. Bxf3 *
Position (FEN): r4rk1/pp2pp2/3p1bpp/2pPn3/2P5/2N1PBBq/PPQ2P2/R4RK1 b - - 0 18
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 713
Best move: Nxf3#