Dovetail Burr is our follow-up to the Japanese Wood Joint puzzle we released last month. Both are part of the series that Frans designed nearly 20 years ago. Inspired by traditional Japanese woodworking joinery techniques, Dovetail Burr was Frans's IPP 20 Exchange puzzle.

Dovetail Burr remains an utterly unique interlocking board burr concept despite its age. The presence of matched dovetail joints forces each pair of pieces on a given axis to interact with the other. This innovation creates a distinct challenge with unfamiliar restrictions that will make you sit and think!

The construction of Dovetail Burr was complicated. The dovetail joint adds an extra dimension to crafting difficulty over and above the typical precision requirements of a quality board burr. This difficulty is reflected in the meager availability of quality copies of this puzzle.