The purpose of the game is to clear all play stones! There are always fourmaps with the same symbols. The maps are cleared by click of the same pair. In addition, the player has the possibility to cancel all trains done up to now. For it fifteen points are drawn off. The first level begins with 72 tiles, from the tenth level 144 tiles are to be diminished. Up to the 12 level the degree of difficulty of step increases to step.