With this range of puzzles, Hanayama tried to bring back to life the “Cast Metal Puzzle”. To create these puzzles, zinc alloy is melted and cast into a metal mould. They are called “Cast Puzzle” because of the manufacturing process; the casting method.
Cast Nutcase may give you the impression that it is simple, but it is just an illusion. Its author, Oskar van Deventer, presents you with two challenges: 1) Remove the small nuts from the screw, and 2), change the order of the text from “nut-case” to “case-nut”.
Do you accept the challenge?