Main motif of this puzzle: Deflection into pin
A deflection is a move that forces a capture, luring the capturing piece away from protecting another piece or square.
An attack on a piece is called a pin, when moving it out of the attack would expose a more valuable piece behind it.
The hint button is in beta test. We recommend to use the button only after you've thought about the puzzle for some time without finding any idea.
Read more about the hint button in this blog post.