Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. f3 Bf5 4. Nd2 e6 5. g4 Bg6 6. Bg2 Nc6 7. e3 Bb4 8. a3
Bxd2+ 9. Bxd2 dxc4 10. Ne2 Bd3 11. O-O Bxe2 12. Qxe2 O-O 13. Qxc4 e5 14. g5
exd4 *
Position (FEN): r2q1rk1/ppp2ppp/2n2n2/6P1/2Qp4/P3PP2/1P1B2BP/R4RK1 w - - 0 15
White to move.
Themes:  Middlegame  
Puzzle rating: 1220
Best move: gxf6