Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nf3 Bg4 4. e3 e6 5. Be2 Be7 6. O-O c6 7. Nc3 O-O 8. Ne5
Bxe2 9. Qxe2 Nbd7 10. f4 Nxe5 11. fxe5 dxc4 *
Position (FEN): r2q1rk1/pp2bppp/2p1pn2/4P3/2pP4/2N1P3/PP2Q1PP/R1B2RK1 w - - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1434
Best move: exf6