description Fifteen Puzzle Overview
The Fifteen Puzzle is a classic sliding tile puzzle consisting of a four-by-four grid that holds fifteen numbered square tiles and one empty space. Players slide adjacent tiles into the empty space one at a time with the objective of arranging the tiles in sequential numerical order from one to fifteen. It gained massive popularity in the 1880s and later sparked a global puzzle craze. The mathematical concept of permutations means that half of all possible starting configurations are unsolvable, making the puzzle a foundational example in the study of combinatorial mathematics.
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