Main motif of this puzzle: Vukovic mate
In Vuković's mate, a rook checkmates the king on the edge of the board. The rook is next to the king, and a knight behind the rook prevents the escape.
Learn more in this guide.
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.