There are six identical pieces to make the Hyperboloid Burr. So why are there seven pieces in the box?
Two puzzles in one. Assemble the six piece burr. And assemble an uncommon seven piece burr.
Designed by the prolific Dutch designer Oskar van Deventer aided by Naoaki Takashima from Japan. Oskar had originally only designed this with a six piece burr solution. It’s not a very difficult puzzle so we do not show the shape of the burr in a photo here. We’ll leave that for you to find.
Oskar did not discover the unexpected seven piece burr assembly. That was discovered by accident by the manager of the Kanagawa Toy Company in Odawa, Japan while he was crafting a special wooden edition of the puzzle.
Definition of hyperboloid:
a quadric surface whose sections by planes parallel to one coordinate plane are ellipses while those sections by planes parallel to the other two are hyperbolas if proper orientation of the axes is assumed
So, did you get all that? I’m not ashamed to say I barely got half of it. But I’m sure Oskar and Naoaki understand it so the puzzle is probably accurately named!
This version of the puzzle is produced in the UK by Steve Nicholls and Ali Morris at Two Brass Monkeys and 100% of the work on this puzzle is done in the UK. This is a high-quality puzzle made with fine tolerances from solid brass. The brass is machined with very high precision, a mere 0.03mm looser and the 7 piece solution to the puzzle would not stay together and 0.03mm tighter and it would not assemble.
Neither burr has a high degree of difficulty to assemble; it’s about the quality and workmanship as much as the puzzling.
Size: Each piece is 40mm long and has a diameter of 18mm; although my measurements are not nearly as accurate as those of the craftsman who made the puzzle!
A solution is not included with the puzzle.