The Sliding Puzzle (or 15-puzzle) is a classic tile-sliding brain teaser. Fifteen numbered tiles share a 4x4 board with one empty space. Slide tiles into the gap one at a time to arrange them in order from 1 to 15. It looks simple, but planning the right sequence of moves is a genuinely rewarding challenge.
Yes — the board is always shuffled from the solved state with valid moves, so a solution always exists.
Slide the numbered tiles until they read 1 to 15 in order with the empty space last.