Its the classic 15 puzzle but with a lot of new features. The rules are simple, slide pieces around until you have ordered the numbers from lowest to highest from top left to bottom right.
Battle against your friends to determine once and for all who is the definitive 15 puzzle solver. Use different competitive settings like a timer, move counter or getting the same shuffle as your friend to easily see who is the best.
Game getting too hard? Too easy? Simply change the size of the board to fit the game to your personal skills and abilities.