|View static image|
|Number of cells||18|
|Discovered by||C. R. Tompkins|
|Year of discovery||1970|
|It has been suggested that this article or section be merged into Grin. (Discuss)|
Cheshire cat is a block predecessor created by C. R. Tompkins that unaccountably appeared both in Scientific American and in Winning Ways. It is named for the fact that it evolves into a grin in six generations and a block (identified with a pawprint) in seven.