This puzzle consists of two intersecting rings made up of a number of coloured balls. The rings of balls intersect at two places, so they share two of the balls. Each ring of balls can be turned, so the balls can be mixed.3 types of puzzles are supported with different number of colored balls (2,3 and 4 colors).O’sullivan Rings has 2 colors.Rubik’s Rings has 3 colors.Hungarian Rings has 4 colors.Good luck.