Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. h3 c5 4. Nc3 h6 5. Nd5 Nc6 6. c3 Nf6 7. Bb5 Bd7 8. a4 a6
9. Bc4 Be7 10. O-O O-O 11. d3 Be6 12. a5 Nxa5 *
Position (FEN): r2q1rk1/1p2bpp1/p2pbn1p/n1pNp3/2B1P3/2PP1N1P/1P3PP1/R1BQ1RK1 w - - 0 13
White to move.
Themes: Kingside Attack Middlegame  
Puzzle rating: 1716
Best move: Nxe7+