The Slothouber–Graatsma puzzle is a packing problem that calls for packing six 1 × 2 × 2 blocks and three 1 × 1 × 1 blocks into a 3 × 3 × 3 box.
The Slothouber–Graatsma puzzle is a packing problem where you need to fit six 1 × 2 × 2 blocks and three 1 × 1 × 1 blocks within a 3 × 3 × 3 box.