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 Nf6 6. d3 Be7 7. Nc3 Nc6 8.
Nd5 O-O 9. Bg5 *
Position (FEN): r2q1rk1/ppp1bppp/2np1n2/3Np1B1/2B1P3/3P1Q1P/PPP2PP1/R3K2R b KQ - 6 9
Black to move.
Themes:  Middlegame  
Puzzle rating: 1354
Best move: Nxd5