It’s been over two years since I came out with my last major puzzle, Model #360, and that’s certainly not what I had planned. Instead of just focusing on a single design and getting it out quickly, I’ve been working on four and progress on all of them has, predictably, suffered. However, the end to this long dry spell is in sight. Here is a picture of a working prototype of my next puzzle, Model […]
MoreMonthly Archives: October 2020
“The Pennyhedron Revisited” Revisited
At the end of my last post I talked about George Bell’s fascinating paper, “The Pennyhedron Revisited”, and a puzzle he mentions in it called “De Doe Dak Ka”. Stuart Gee designed it and George reports that it is the first known four-piece pennyhedron, having been introduced in 2007 at IPP27. It’s a very cool coordinate motion puzzle of four identical pieces. I started playing around with the shape, initially making a sphere and adding […]
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