This is another of Frans' rather old designs. He has studied Board Burrs quite extensively and his writings about them are very interesting. While Irregular Board Burr does not have any color restrictions it is still a very fun puzzle.
This is another of Frans' rather old designs. He has studied Board Burrs quite extensively and his writings about them are very interesting. While Irregular Board Burr does not have any color restrictions it is still a very fun puzzle.