Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_London_System
Moves: 1. d4 Nf6 2. Bf4 d5 3. Nf3 Nc6 4. h3 e6 5. c3 Bd6 6. Bg5 Bd7 7. Nbd2 h6 8. Be3
Qe7 9. Qc2 e5 10. dxe5 Nxe5 11. Bd4 Nxf3+ 12. Nxf3 O-O-O 13. O-O-O Bf5 *
Position (FEN): 2kr3r/ppp1qpp1/3b1n1p/3p1b2/3B4/2P2N1P/PPQ1PPP1/2KR1B1R w - - 3 14
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 933
Best move: Qxf5+