Domino 4 is a game of dominoes but each tile is divided by the square diagonally and includes dominoes from 0 / 1 to 4 / 4, fourteen types of dominos in four colors. Add four jokers - the equivalent of 0 / 0 - and you have sixty tiles. Gilles Monnet devised a simple rule, but interesting. While the classic domino game are done in one dimension, Domino 4 is a game in two dimensions. Tiles can be placed so that all numbers fits with other adjacent tiles but diagonals may be turn in 2 ways.