Editing Col (game) (section)

{{Short description|Pencil and paper map-coloring game}}
'''Col''' is a [[pencil and paper game]], specifically a [[map-coloring games|map-coloring game]], involving the shading of areas in a line drawing according to the rules of [[graph coloring]].  With each move, the graph must remain [[Graph coloring#Vertex coloring|proper]] (no two areas of the same colour may touch), and a player who cannot make a legal move loses.  The game was described and analysed by [[John Horton Conway|John Conway]], who attributed it to [[Colin Vout]], in ''[[On Numbers and Games]]''.<ref>[[#ONaG|On Numbers and Games]]: 1</ref>