Assembly Puzzle

Pack six flat pieces of 2 to 7 cubes into a solid 3×3×3 cube; there are about 13 distinct solutions.

Fit irregular, usually interlocking pieces together to rebuild a complete picture and outline.

A Japanese seven-piece silhouette puzzle that cuts a square differently from the Chinese Tangram; all seven pieces are used without overlap to match a target outline.

Fold a chain of 27 linked small cubes, section by section, into a solid 3×3×3 cube.

Assemble seven irregular cube pieces into a 3×3×3 cube or another prescribed three-dimensional form.

A Chinese seven-piece dissection puzzle in which all pieces are rearranged without overlap to reproduce a silhouette.

A 15-piece Qing-dynasty silhouette puzzle by Tong Yegeng, with some curved pieces. Not the same as the seven-piece Tangram, which is sometimes also called "Yizhi tu."