Here is a puzzle consisting of 12 identical sticks that snap together
in a tricky arrangement.
The colors show that you can see it as four triangles, so it is related
to the four triangle puzzle
Here is my first instance of it, made of ABS plastic on a Makerbot
You can see each piece is a rod with three notches at particular angles.
It looks very different from different viewpoints. Above is the
And here is the 3-fold view.
You can see a few gaps in this image, so my stl file needs a bit of
Now I've made a revised version in four colors.
I tried dying uncolored ABS, but it came out rather splotchy.
Here's another view of it, looking down a 4-fold axis.
The assembly solution steps are shown here
The stl file to make your own copy of it is available here
This puzzle is in some ways similar to Geoff Wyvill's Nova Plexus
these four triangles are concentric, while Wyvill's
puzzle is based on a different orderly
, with four non-concentric triangles. It is also very similar
Phillipe Dubois' Kubion
by Gaby Games
, but its parts
do not overlap at the ends and so have only the two central
notches. Thank you Nick Baxter for helping me track this down and
for the Kubion
see Slocum and Botermans, Puzzles
Old and New
, p. 76.