Object: The Saturn puzzle consists of a ring with on both sides a circular track with 16 discs that can slide along it. The 32 discs have colors painted on both sides. In the middle of the ring there is a bar and the discs can slide onto this bar from one end. The bar can rotate (around its long axis) allowing the pieces to swap sides. It also allows a piece to be replaced on the same side but flipped over. The object to solve this puzzle is to arrange the pieces so that each side shows only four colors, four pieces of each color.