-like game invented by Ed Pegg
, based on a pair of geometric shape
s he discovered. These shapes, two equilateral
but not equiangular pentagon
s, are each divided into a triangle
and a quadrilateral
by a line roughly across the middle
, and each side contains a single spot of some color
. The shapes have the names kay
The two shapes combine to form many beautifully chaotic-looking patterns. Ed has yet to determine if the shapes tile the plane, periodically or not.
Ed has invented several games that can be played with the tiles. For more information, including rules for the games, visit his website, www.mathpuzzle.com.