Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_London_System
Moves: 1. d4 d5 2. Bf4 Nf6 3. Nf3 e6 4. e3 Bd6 5. Ne5 O-O 6. Bd3 Nbd7 7. c3 c5 8. Nd2
cxd4 9. exd4 Qc7 10. Ndf3 Re8 11. h4 Nh5 12. Bxh7+ Kf8 13. Ng5 *
Position (FEN): r1b1rk2/ppqn1ppB/3bp3/3pN1Nn/3P1B1P/2P5/PP3PP1/R2QK2R b KQ - 2 13
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1630
Best move: Nxf4