15Slide is a computer slide-puzzle game. It's an advanced version of the well-known 15 puzzle. To solve the puzzle you have to original order of randomly shuffled numbered pieces in the least moves possiblen by sliding pieces into the empty spot. 15Slide differs from the original puzzle of 15: except standard board size, it offers number game boards from 4x4 up to 10x10 size and 3 levels of difficulty.