Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Bb5 Bd7 7. Nxc6 bxc6 8.
Bd3 Ne7 9. O-O Ng6 10. f4 Bc5+ 11. Kh1 O-O 12. Nd2 Qh4 13. Nf3 Qd8 14. c3 Qb6
15. b4 Be3 16. Ng5 Bxc1 17. Rxc1 c5 18. Qh5 h6 19. Rf3 cxb4 *
Position (FEN): r4rk1/p2b1pp1/1q2p1np/3pP1NQ/1p3P2/2PB1R2/P5PP/2R4K w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 2051
Best move: Nxf7