Col

"This game is taken from the book, On Numbers and Games, by John Conway (Academic Press, 1976) and is attributed to Colin Vout."

http://www.cs.uidaho.edu/~casey931/conway/col.html

Using any map of blank regions, players select colors (crayons) and take turns coloring any region which does not border a region they have previously colored. The winner is the last player able color a region.

This is a great use for completed Sprouts games. http://www.boardgamegeek.com/game/7378

A variant named, Snort, allows bordering oneself but not opponents. http://www.cs.uidaho.edu/~casey931/conway/snort.html