Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Bf5 3. c3 e6 4. Nd2 Nf6 5. h3 Bd6 6. Bh2 Bxh2 7. Rxh2 Nc6 8. g4
Bg6 9. Ngf3 Qd6 10. Rh1 Ne4 11. Nh4 Qf4 12. Nxe4 Bxe4 13. e3 Bxh1 *
Position (FEN): r3k2r/ppp2ppp/2n1p3/3p4/3P1qPN/2P1P2P/PP3P2/R2QKB1b w Qkq - 0 14
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1398
Best move: exf4