Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Other_variations
Moves: 1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. e4 Nxe4 5. Bxc4 Bg4 6. Qb3 Nc6 7. Bxf7+ Kd7
8. Ne5+ Kc8 9. Nxg4 Nxd4 10. Be6+ Kb8 11. O-O *
Position (FEN): rk1q1b1r/ppp1p1pp/4B3/8/3nn1N1/1Q6/PP3PPP/RNB2RK1 b - - 3 11
Black to move.
Themes:  Opening  
Puzzle rating: 1742
Best move: Nxb3