Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Exchange_Variation
Moves: 1. d4 e5 2. e3 exd4 3. exd4 d5 4. Nc3 Nf6 5. Bg5 Be7 6. Bxf6 Bxf6 7. Nf3 O-O 8.
Be2 Nc6 9. O-O Nxd4 *
Position (FEN): r1bq1rk1/ppp2ppp/5b2/3p4/3n4/2N2N2/PPP1BPPP/R2Q1RK1 w - - 0 10
White to move.
Themes:  Opening  
Puzzle rating: 820
Best move: Nxd4