[Kagen Sound] is a woodworker and artist who gives a great behind-the-scenes look at his amazingly high-quality puzzle boxes (video). Not only do his varied puzzle box designs show his math background ...

Riddles are fun, and what are puzzle boxes if not riddles in physical form? This particular box—the "Impossible Dovetail Box"—makes its confusing first impression with a series of dovetail joints that ...

In the 2025 competition, Tortoise Protocol was runner-up for the Puzzlers’ Award, which is determined by attendees who vote for their favorite. The year before, another of Mr. Yananose’s creature ...