Arrange the numbers in ascending order from top left.
An interesting variation on the classic numerical slide 15 puzzle. The objective is to arrange the numbers in ascending order starting at the top left as illustrated in the instructions. Your movements are limited by channels that are cut into the acrylic top and also by different channels in the wood at the bottom. A difficult puzzle that will challenge your logic! Made in laser-cut wood, acrylic, and stainless steel by Siebenstein-Spiele. Based in Munster, Germany, Siebenstein-Spiele was founded in 1992. Although the company is mainly known for board games, Siebenstein-Spiele also makes many wooden puzzles, several of which have been designed by company founder Jürgen Reiche.