lichess.org/learn#/9/5 do not give me the answer but tell me how to solve these type of problems
I think it's about finding paths of attack. It's not a typical puzzle because the opponent doesn't move unless there is an immediate counter capture. ex. advance the pawns and create a queen to capture the rook, position the knight to threaten the queen, etc. The solution involves white making multiple successive moves without hanging any pieces and black not moving.