Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Knight_Variation
Moves: 1. e4 e6 2. Nf3 Nf6 3. Nc3 d5 4. e5 Ng8 5. d4 c5 6. b3 h6 7. Bd2 a6 8. Bd3 Nc6
9. Na4 Nxd4 10. Nxd4 cxd4 11. c4 dxc3 12. Bxc3 Bd7 13. b4 Qc8 14. Bd2 b5 *
Position (FEN): r1q1kbnr/3b1pp1/p3p2p/1p1pP3/NP6/3B4/P2B1PPP/R2QK2R w KQkq - 0 15
White to move.
Themes:  Opening  
Puzzle rating: 1124
Best move: Nb6