Name: Rekubus Challenger - 3D puzzle
Manufacturer: Rekubus Germany
Where to buy: Rekubus Challenger – 3D puzzle at Puzzle Master Inc.
Object: First find out the principle behind the correct interlocking of the 38 pieces. The results must be a solid and undistorted cube. The second object is to place all pieces so the numbers 1 to 9 appear on each side in the sequence from 1 to 9.