If you’re a subscriber to Cubism For Fun (and if you’re not you should be!), you will recognize Bruce Patterson as the author of several puzzle design articles. A few years ago he designed a cubic puzzle of 90 interlocking pieces called Cube90 and built one from wood. I later helped with modeling the pieces so that they could be 3D printed. And here’s the result: With 90 pieces it’s probably impossible to solve by […]