Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Knight_Variation
Moves: 1. e4 e6 2. Nf3 Qe7 3. Bc4 Kd8 4. O-O Qe8 5. c3 a6 6. d4 h6 7. Bf4 d6 8. e5 d5
9. Bb3 Nc6 10. Ba4 Bd7 11. Bxc6 Bxc6 12. Nbd2 Be7 13. Nb3 b6 14. Rc1 a5 15. c4
a4 16. cxd5 Bxd5 17. Nbd2 Bxa2 18. b3 Bxb3 *
Position (FEN): r2kq1nr/2p1bpp1/1p2p2p/4P3/p2P1B2/1b3N2/3N1PPP/2RQ1RK1 w - - 0 19
White to move.
Themes:  Opening  
Puzzle rating: 1596
Best move: Nxb3