| Stewart Coffin started making 6-piece burrs with pieces which did not
follow the normal orthogonal rules. This restricts the number of ways that
the pieces can be rotated, so limits the number of 'assemblies'. I dug up
a level-7 notchable 6-piece burr design from my computer analyses which did
not have a unique solution. When made with the slanted pieces, it does have
a unique solution.
This was my souvenir puzzle at the 14th International Puzzle Party. |
