Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. d4 e6 2. e4 d5 3. e5 Nc6 4. Nf3 Nb8 5. Bd3 c5 6. c3 Nc6 7. O-O Qb6 8. b3
cxd4 9. cxd4 Nxd4 *
Position (FEN): r1b1kbnr/pp3ppp/1q2p3/3pP3/3n4/1P1B1N2/P4PPP/RNBQ1RK1 w kq - 0 10
White to move.
Themes:  Opening  
Puzzle rating: 1171
Best move: Nxd4