Chess puzzle (Checkmate)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Central_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 Bg4 5. Qa4+ c6 6. Nxe5 b5 7. Qc2 Be6 8. Be3
Nf6 9. Be2 Bd6 10. O-O O-O 11. Rd1 Qc7 12. f4 Bxe5 13. dxe5 Ng4 14. Bc5 Nd7 15.
Bxf8 Qb6+ 16. Kh1 Nf2+ 17. Kg1 Nh3+ 18. Kh1 Qg1+ 19. Rxg1 *
Position (FEN): r4Bk1/p2n1ppp/2p1b3/1p2P3/2p1PP2/7n/PPQ1B1PP/RN4RK b - - 0 19
Black to move.
Themes:  Middlegame Mate in 1, Smothered Mate 
Puzzle rating: 1286
Best move: Nf2#