This
puzzle is composed of
twenty identical components that
interlock. It is much harder than it looks. As far as I know, besides
me only George Miller has
solved it. Below is a
view of a stack of its components, right out of an FDM mahine, before
assembly.
If you have access to an FDM machine, you can make your own parts from
the file available here. There is an
article about this puzzle in issue 74 of Cubism
For Fun, which gives the secret of how I assembled it.
.
