Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. h3 Nf6 4. Nc3 Be7 5. d4 exd4 6. Nxd4 O-O 7. Bd3 a6 8. O-O
b5 9. Nd5 Nxd5 10. exd5 Bf6 11. c3 Nd7 *
Position (FEN): r1bq1rk1/2pn1ppp/p2p1b2/1p1P4/3N4/2PB3P/PP3PP1/R1BQ1RK1 w - - 1 12
White to move.
Themes:  Opening  
Puzzle rating: 1990
Best move: Nc6