It's probably wrong but my first instinct is Qa4. Creates a pin on the pawn threatening the knight and lines up with the king. From there the knight can attack on d6 or e7 to double check the king.
It really depends on what black does but he will either lose or lose quite a bit of material with that line.
How many turns?
Win material in 2
Possible follow-up
https://steemit.com/@ayoubazzar
It's probably wrong but my first instinct is Qa4. Creates a pin on the pawn threatening the knight and lines up with the king. From there the knight can attack on d6 or e7 to double check the king.
It really depends on what black does but he will either lose or lose quite a bit of material with that line.