Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Bd7 5. Bb5 Nf6 6. Bxd7+ Nbxd7 7. f3 Be7
8. Bg5 O-O 9. Bxf6 Nxf6 10. Nc3 c5 11. Nf5 Qd7 12. Nd5 Nxd5 13. Nxe7+ *
Position (FEN): r4rk1/pp1qNppp/3p4/2pn4/4P3/5P2/PPP3PP/R2QK2R b KQ - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1353
Best move: Nxe7