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 Bd7 7. Bc2 Nge7 8. a3
Nf5 9. b4 cxd4 10. Bxf5 exf5 11. cxd4 Be7 12. Nc3 Be6 13. Na4 Qb5 14. Nc5 O-O
15. Nxe6 fxe6 16. Bd2 Qd3 17. Be3 Qb5 18. Ng5 Nd8 19. Rb1 *
Position (FEN): r2n1rk1/pp2b1pp/4p3/1q1pPpN1/1P1P4/P3B3/5PPP/1R1QK2R b K - 7 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1474
Best move: f4