The fifteen puzzle is a classic sliding puzzle game where players are presented with a 4x4 grid of numbered tiles, with one missing number. The objective is to move the tiles around to form a sequence from 1 to 15, with the blank space being number 0.
Players can move adjacent tiles horizontally or vertically into the empty space, but only one space at a time. The goal is to arrange the tiles in numerical order from 1 to 15, leaving the empty space as the 16th position. The game can be played without any downloads or registrations in the browser.