Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 cxd4 7. cxd4 Nxd4 *
Position (FEN): r1b1kbnr/pp3ppp/1q2p3/3pP3/3n4/3B1N2/PP3PPP/RNBQK2R w KQkq - 0 8
White to move.
Themes:  Opening  
Puzzle rating: 1946
Best move: Nxd4