Gabuku is an adaptation on Sudoku that you play on a cube. In normal Sudoku, the 3x3 sections, columns, and rows must all contain 1-9. In Gabuku the rules are very similar, except the columns and rows wrap around the cube and the 3x3 sections are replaced by the 4x4 faces of the cube. To win you must find the single number that fits in each cell; there is only one solution to each puzzle.