This puzzle is an expanded version of the Meanders Box. In the Meanders Box, the top plate slid along with the four side pieces. In the Dual Meanders Box, not only does the top plate slide, but the bottom plate also slides. This allows for a puzzle with a large number of moves without the need to increase the steps of the side pieces.This puzzle can be configured to 4 different positions based on the orientation of the 2 plates, which move counts being 325, 367, 410, and 506 moves....