The "Ghost Protocol" Mission: Extreme Level Hanidoku!Are you looking for the absolute ceiling of logical challenges for your classroom? Secret Cipher Prints presents the Extreme Level Honeycomb Sudoku Pack. Featuring 16 of our most difficult Hanidoku grids, this collection is specifically engineered for students who find standard "Expert" puzzles too simple. Why the "Extreme" Pack is a Powerhouse Resource:Maximum Cognitive Load: These grids provide the bare minimum of starting information, re