Like sudoku puzzles, but don't find them challenging enough? Enter my take on the classic: the Sudokube!
"Sudokubes" are made up of 6 smaller Sudoku puzzles each placed onto a face of a cube, and the edges/corners of
matching faces have shared numbers.
For example, if you have 1 in the bottom right corner of the puzzle on top face of the cube, that will mean there must also be a 1 in the top right corner of the front face (and even a 1 in the top left corner of the right face!)