The
18 move box is the most challenging of the 3 Sun boxes. Several reverse moves add to
the difficulty. It's exterior is clad in the classic Koyosegi. Most find this box to be
quite the puzzler.
6 moving components (4 Sliding Panels, 2 Sliding Keys)
make up the 18 moves of this puzzle box. They work very well. Color opening instructions
are provided. Try it without looking at them.
A mechanical puzzle is a self-contained object, composed
of one or more parts, which involves a problem for one person to solve by manipulation
using logic, reasoning, insight, luck, and/or dexterity. - Jerry Slocum