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 c6 7. Be2 O-O 8. O-O
a6 9. f4 c5 10. Nb3 b5 11. Nd5 Nxe4 *
Position (FEN): rnbq1rk1/4bppp/p2p4/1ppN4/4nP2/1N5P/PPP1B1P1/R1BQ1RK1 w - - 0 12
White to move.
Themes:  Opening  
Puzzle rating: 2110
Best move: Bf3