6×General Lattice PuzzlesInterlocking burr assembly
Interlocking Puzzle

Build the burr in the right order.

A packing solver only checks whether pieces fit in the finished shape. A burr also has to admit a legal path for each piece. Step through this documented simple six-piece burr: its solid key is inserted last.

Assembly view

Schematic view of the parts being added. The source describes the notch shapes and order; this drawing is illustrative, not a geometric collision model.

1 2 3 4 5 6
Step 1 of 4

Make the frame

Fit pieces 1 and 2 together to form the empty rectangle.