Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Tarrasch_Variation
Moves: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 cxd4 7. cxd4 Nc6 8. Ne2
Qb6 9. Nf3 Bb4+ 10. Bd2 Qa5 11. O-O Bxd2 12. Qxd2 Qxd2 13. Nxd2 O-O 14. Nf3 f6
15. Nf4 Re8 16. Rfe1 g5 17. Nh5 g4 18. Nxf6+ *
Position (FEN): r1b1r1k1/pp1n3p/2n1pN2/3pP3/3P2p1/3B1N2/PP3PPP/R3R1K1 b - - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 808
Best move: Nxf6