Slothouber-Graatsma Puzzle

Assemble six $1\times 2\times 2$ blocks and three $1\times 1\times 1$ blocks into a $3\times 3\times 3$ Cube.

See also Box-Packing Theorem, Conway Puzzle, Cube Dissection, de Bruijn's Theorem, Klarner's Theorem, Polycube

References

Honsberger, R. Mathematical Gems II. Washington, DC: Math. Assoc. Amer., pp. 75-77, 1976.