Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Bd3 Nc6 6. Nf3 Bd7 7. Nbd2 cxd4 8. cxd4
Nxd4 9. O-O Nc6 10. Nb3 Nge7 11. Be3 Qc7 12. Rc1 Ng6 13. Nc5 Bxc5 14. Bxc5
Ngxe5 15. Nd4 Qa5 *
Position (FEN): r3k2r/pp1b1ppp/2n1p3/q1Bpn3/3N4/3B4/PP3PPP/2RQ1RK1 w kq - 2 16
White to move.
Themes:  Middlegame  
Puzzle rating: 2305
Best move: Nb5