Sliding Puzzle

Sliding Puzzle is a 4x4 grid of fifteen numbered tiles and one empty slot. Your job is to slide the tiles around the gap until they read 1 through 15 in order, with the blank parked in the bottom-right corner. Every board is scrambled from the finished layout, so a complete solution always exists before you make a single move.

What makes this version distinct is how each puzzle is born. Instead of pulling a fixed board from a list, the game runs a chain of legal blank moves starting from the solved state, right inside your browser. No two sessions are alike, and because it only ever shuffles reversibly, the result is mathematically guaranteed solvable. We never hand you an impossible arrangement. Stuck on one? Hit Shuffle for a fresh scramble anytime.

Interaction is built for both quick taps and careful planning. Any tile sharing a row or column with the gap slides as a whole, so a single touch can shift several pieces at once. A move counter and a live timer sit across the top, and the board resizes cleanly from a phone screen to a wide desktop. No hints are forced on you, and no move is ever locked away behind a paywall.

The whole experience is a single self-contained HTML file. There are no downloads, no accounts, and no tracking of any kind. Everything runs locally in your tab the moment the page opens, so it plays instantly whether you are on a laptop at a desk or killing a few minutes on a phone.