Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Bc4 Bg4 4. h3 Bxf3 5. Qxf3 Qf6 6. Qb3 b6 7. Bd5 c6 8. Qa4
b5 9. Bxc6+ Nxc6 10. Qxb5 Ne7 11. Nc3 Rb8 12. Qa4 g6 *
Position (FEN): 1r2kb1r/p3np1p/2np1qp1/4p3/Q3P3/2N4P/PPPP1PP1/R1B1K2R w KQk - 0 13
White to move.
Themes:  Opening  
Puzzle rating: 1024
Best move: Nd5