The color restrictions on this design make it a very attractive puzzle in addition to being quite a challenge! Made with Peruvian walnut and Marblewood, the alternating color pattern you must achieve make for a beautiful piece when solved. Frans sent me the design for this and I knew I had to include it with the other 2 designs of his, for this release. Remember, you must have the alternating colors (the chequerboard look) in each "corner" to solve it.