While the web site which will depict known solutions to the cubes is still under construction, I want to describe some examples of known solutions. A solution depicts the visible stones of each face of a cube in a fold-out map that represents the six faces in the form of a cross with the left, top, and right face going across, and the back, top, front and bottom face going down. In each face, the stones are identified by their letter symbols with the shapes distinguished from each other by different colors. 

For example, the Q cube from the 3C series (which is the cube in which the stones 3C and Q are missing) is described by the grid system above. It is known as Rosmari's solution.