Packing and Tiling
37 nonominoes have a hole. This makes it trivial to prove that the complete set of nonominoes cannot be packed into a rectangle, and that not all nonominoes can be tiled. However, it has been proven that 1,050 free nonominoes, or all but 235, do tile the plane.
One nonomino has a two-square hole (second rightmost in the top row). It is the smallest polyomino with a two-square hole.
Read more about this topic: Nonomino
Famous quotes containing the word packing:
“He had a wonderful talent for packing thought close, and rendering it portable.”
—Thomas Babington Macaulay (1800–1859)