Chess puzzle (Advantage)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Scandinavian_Variation
Moves: 1. d4 d5 2. e4 Nc6 3. Nc3 e6 4. Bb5 Bd7 5. exd5 exd5 6. Nxd5 Nf6 7. Bxc6 bxc6
8. Qe2+ Be7 9. Nxe7 Qxe7 10. Qxe7+ Kxe7 11. Nf3 Rhe8 12. O-O Kf8 13. Bf4 Bf5
14. c3 Nd5 15. c4 *
Position (FEN): r3rk2/p1p2ppp/2p5/3n1b2/2PP1B2/5N2/PP3PPP/R4RK1 b - - 0 15
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 930
Best move: Nxf4