The power of logical thinking in calculation

When calculating, sometimes the right threats don't just come to us.

At this moment, it is useful to use some logical reasoning. Consider the following problem. Spend ~10 minutes

Were you able to solve the problem? If not, here is a hint:
White's main undefended piece is this queen on h5. We seem to have potential for a discovered attack by moving the g6 knight away. What kind of position would make this knight move immediately decisive?


*****Second Hint*******
What if moving the knight would be a *check*?