Main motif of this puzzle: Blind swine mate
In blind swine mate, a rook on the seventh rank delivers checkmate to the king on the back-rank. The rook is protected by another rook on the seventh rank.
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.