Paper and pencil games

    Col Col is a pencil and paper game, specifically a 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 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 Conway, who attributed it to Colin Vout, in On Numbers and Games.
    In the following game, the first of the two players is using red, and the second is using blue. The last move in each image is shown brighter than the other areas... Read more ...
    

    The second player now colours a white cell. As no areas are currently blue, any white cell is allowed
    At this point, the requirement that the graph be proper comes in to effect, as a red area must be made which does not touch the existing one...
    

Free game on paper