Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Mason_Variation
Moves: 1. d4 d5 2. Bf4 e6 3. e3 Bd6 4. Nf3 f5 5. Nbd2 Nf6 6. Nb3 O-O 7. Be2 b6 8. O-O
Bb7 9. Ne5 Nbd7 10. c4 Qe7 11. h3 c5 12. cxd5 exd5 13. Nxd7 Nxd7 14. Bxd6 Qxd6
15. dxc5 bxc5 16. Bf3 Ne5 17. Rc1 Rac8 18. Na5 Ba8 19. Nc4 *
Position (FEN): b1r2rk1/p5pp/3q4/2ppnp2/2N5/4PB1P/PP3PP1/2RQ1RK1 b - - 7 19
Black to move.
Themes: Kingside Attack Middlegame  
Puzzle rating: 1533
Best move: Nxf3+