Abstract: A puzzle has a cube housing and is solved by rotating the faces into a horizontal plane. Each face has multicolor lamps which are one color when the puzzle is solved. Each lamp may be red, green or yellow by producing red and green together. A microprocessor programmed to read switches in the cube to define the cube orientation and particularly the horizontal face. The processor has a table of algorithms which are assigned to edges between adjacent faces. Upon rotation of the cube about an edge in the horizontal plane, the microprocessor executes the assigned algorithm upon the previously existing display of that face. The microprocessor by referencing to the previous plane and the new plane automatically determines the rotational edge and the direction of rotation to enter and execute the appropriate algorithm. In doing so, the particular lamps are changed from an existing color to that defined by the algorithm.