Description:
The challenge is to construct a square block of numbered cubes, arranged in such a way that every possible row, column and side around the block contains each of the numbers 1 – 9. Meanwhile inside the block, every 3×3 section, sliced vertically or horizontally, also consists of the digits 1 – 9. So pit your wits against the invisible force of the 27 cubes in this ingenious puzzle.