Chess puzzle (Advantage)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Scandinavian_Variation
Moves: 1. e4 d5 2. e5 Nc6 3. d4 Bf5 4. a3 f6 5. g4 Be4 6. f3 Bg6 7. e6 f5 8. g5 Nf6 9.
gxf6 exf6 10. f4 Bd6 11. Be3 Qe7 12. Nc3 Bxf4 13. Bxf4 Qxe6+ 14. Qe2 Nxd4 15.
Qxe6+ Nxe6 16. Nxd5 O-O-O 17. O-O-O Bh5 18. Rd2 Rhe8 19. Bc4 *
Position (FEN): 2krr3/ppp3pp/4np2/3N1p1b/2B2B2/P7/1PPR3P/2K3NR b - - 6 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 801
Best move: Nxf4