Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 Nf6 2. c4 d5 3. Nc3 dxc4 4. e4 Nc6 5. Nf3 Bg4 6. d5 Ne5 7. Be2 Bxf3 8.
gxf3 e6 9. Bf4 Ng6 10. Bg3 exd5 11. exd5 Bb4 *
Position (FEN): r2qk2r/ppp2ppp/5nn1/3P4/1bp5/2N2PB1/PP2BP1P/R2QK2R w KQkq - 1 12
White to move.
Themes:  Opening  
Puzzle rating: 1053
Best move: Qa4+