Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Nc3 c5 4. Bc4 Nc6 5. O-O Be7 6. d3 Bg4 7. h3 Bh5 8. g4
Bg6 9. Kg2 Bf6 10. g5 Be7 11. Nd5 Nd4 *
Position (FEN): r2qk1nr/pp2bppp/3p2b1/2pNp1P1/2BnP3/3P1N1P/PPP2PK1/R1BQ1R2 w kq - 3 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1551
Best move: Nxd4