Slide Puzzle Néon
The classic 15-puzzle in retro neon: slide the tiles and put them back in order as fast as you can.
Read the rules below, then start your run.
About this game
Slide Puzzle Néon is the great classic — the famous 15-puzzle — dressed in a polished retro-neon skin. The idea is as easy to state as it is hard to optimise: a four-by-four grid holds fifteen tiles numbered 1 to 15, plus one empty square. By sliding the tiles next to that empty square into it, you slowly reorganise the board. Your goal: put every tile back in ascending order, from 1 in the top left through to 15, leaving the empty square in the bottom right. Easy to describe, much cleverer to solve: every move constrains the next, and placing the last tiles without wrecking the first takes method and foresight. The starting shuffle is always guaranteed solvable by construction — never an impossible board, never a game lost before it starts: a solution always exists, and finding it is your job. Your score is your TIME: the faster you solve, the better your record, and the shortest clock takes the leaderboard. The timer starts on your very first move and stops dead when the grid is in order. A move counter runs alongside: it measures how efficient you were and makes a fine personal challenge (solve it in fewer moves), even though it is time that sets your record. The controls work for touch as much as for the keyboard: on mobile, just tap a tile next to the empty square to slide it, or swipe across the screen to push a tile along; on a computer, the arrow keys or W A S D answer instantly. Every slide is smooth, punctuated by a discreet synthesised cue, all at 60 frames per second. The neon look is built for instant readability: the tiles are raised, glowing buttons, their numbers stay sharply contrasted, and the empty square stands out by being sunken and darker — a distinction that does not rest on colour alone, so it holds up with colour blindness. A tile already in its final place picks up a discreet outline to help you track your progress. Slide Puzzle Néon is free and instant in your browser, nothing to install, on desktop and mobile alike. This timeless puzzle, which has kept generations of players busy, has never looked better. Create an account to sync your best times, enter the leaderboards and unlock trophies as you solve. How many seconds will it take you to put it all back in order?
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How to play
Put the fifteen numbered tiles back in order from 1 to 15 as fast as you can, sliding them into the empty square.
Game rules
- The 4×4 grid holds fifteen tiles numbered 1 to 15 and a single empty square.
- You can only move a tile directly next to the empty square; it then takes that square’s place.
- The goal is to rebuild the order 1 → 15, row by row, with the empty square in the bottom right.
- The starting shuffle is always guaranteed solvable: a solution definitely exists.
- The clock starts on your very first move and is your score (shortest time wins).
- A move counter runs alongside it so you can judge how efficient your solve was.
Controls (keyboard and touch)
- Tap a tile (touch)Slide the adjacent tile into the empty square
- SwipePush a row towards the empty space
- Arrow keys / W A S DMove a tile into the empty square
How a run ends
You win as soon as the fifteen tiles sit in order with the empty square in the bottom right. There is no way to lose: only your time counts for the score, with your move count as a side note.
Tips & strategy
Solve row by row
Place the top row first (1, 2, 3, 4), then the second, and never touch them again. Locking down the top of the grid shrinks your workspace and makes the rest far easier to read.
The trap of the last two rows
For the bottom two rows, think in columns rather than rows. Finish by placing the pairs (13-14, then 15) by rotating them around the empty square: that is the technical heart of the puzzle.
Set up the corners early
Getting a corner number like the 4 or the 12 into place usually means bringing its neighbour in first, then rotating the pair together. Thinking one move ahead saves you from undoing your own work.
Did you know?
The 15-puzzle appeared in the United States in the 1870s and set off a genuine craze around 1880. Legend credits Sam Loyd with inventing it, but historians point instead to Noyes Chapman, a postmaster from New York State.
His famous "14-15" puzzle, which offered a reward for swapping two tiles, was in fact impossible: the parity of permutations makes half of all arrangements unsolvable. That is exactly why Slide Puzzle Néon only ever deals you shuffles that are mathematically guaranteed to have a solution.
Frequently asked questions
- Is Slide Puzzle Néon free to play?
- Yes. Slide Puzzle Néon is completely free and runs straight in your browser — no download, no install, no paywall.
- How do you play Slide Puzzle Néon?
- Hit “Play” to start Slide Puzzle Néon. It runs on keyboard on desktop and on touch controls on phones and tablets — no controller needed.
- Do I need an account to play?
- No — you can play right away as a guest, and your best score is kept on this device. A free account (by email link, no password) syncs your high scores, puts you on the leaderboards and unlocks trophies.
- Does Slide Puzzle Néon work on mobile?
- Yes. The game is responsive and fully playable with your fingers on phones and tablets, just like on desktop, with no app to install.
- Is a sliding puzzle always solvable?
- Here, yes. The shuffle is built to stay inside the solvable configurations: because of the parity of permutations only half of all arrangements can be solved, and the game rules the other half out every time.
- Does the move counter affect my score?
- Your score is time: the shortest clock wins. The move counter is there as an efficiency gauge, to help you work towards cleaner solves, but it does not feed into the leaderboard.