Uranus
Designed by Junichi Yananose, made by Eric Fuller.
(7 wood pieces, 3 inches)
Looks at first like a standard 6-piece burr.
However, one of the apparent pieces is really two pieces
(the one marked with a red dot in the above photo).
Here is what the puzzle maker said:
"At first glimpse this puzzle looks like another 6 piece burr iteration.
However, disassembly will show that it holds a surprise! One of the pieces has been split,
creating a very unique 7 piece burr with quite a tricky solution.
Internal voids make this a level 6 burr and also create many unassemblable solutions that will frustrate the solver.
This is a difficult puzzle to solve."