Missing Link - The Mind-Twisting Puzzle

Missing link, a unique mechanical slide puzzle invented in 1981 with millions of combinations! mix it up and try to get all the colors to match. Can you find "the missing link" this missing link puzzle consists of a square tower with four layers. On the sides are sliding tiles, and each side has a chain in a different color, yellow, green, red and white. The white chain has only 3 tiles, allowing the tiles to slide up and down into the gap. The top and the bottom layer will rotate mixing up the colors from the different color chains. The two middle rows can’t be rotated. To move tiles in these rows, loop the tiles up and down from one row to another. Recommended ages 8+