3D SuDoKu Java Game

one big brain exercise! and though you think the rules are simple, solving it is a real challenge. Every row and column contains the digits from 1 to 9, and each of the nine 3x3 regions will also contain one of each digit. With a few cells exposed, you can deduce the other cells until the entire grid is filled. Things get even tougher with this 3D version of the game.