A life configuration which starts out as a cat with ears. The face then vanishes leaving a grin, and finally the grin vanishes leaving only a paw print (block) after a total of seven generations. The Cheshire cat was discovered by C. R. Tompkins.

Grin

References

Gardner, M. "The Game of Life, Parts I-III." Chs. 20-22 in Wheels, Life, and Other Mathematical Amusements. New York: W. H. Freeman, pp. 237-238, 1983.

Silver, S. A. "Life Lexicon." Release 17, 2000 August 24. http://www.argentum.freeserve.co.uk/lex.htm.