If you had the 15 slide puzzle in childhood you won't fail to try this program. For some it will be an thrilling discovery. The puzzle consists of a box with 15 numbered tiles that can be slided around to be grouped from 1 to 15. The freeware implements a shuffling algorithm that performs scrambling by random moving; therefore the puzzle is always solvable. Besides, this is possible to turn on elementary sound effects and use various colour schemes.