Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Gunsberg_Defense
Moves: 1. d4 d5 2. Nf3 c5 3. c4 dxc4 4. e3 cxd4 5. Nxd4 Nf6 6. Bxc4 Bg4 7. Qa4+ Nbd7
8. O-O e6 9. Nc3 Be7 10. Bb5 a6 11. Bxd7+ Nxd7 12. Nb3 O-O *
Position (FEN): r2q1rk1/1p1nbppp/p3p3/8/Q5b1/1NN1P3/PP3PPP/R1B2RK1 w - - 2 13
White to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1439
Best move: Qxg4