The 15 Puzzle is the sliding puzzle of numbered tiles: slide them one at a time, or a whole row at once, until they run in order with the gap in the bottom-right corner. Play the classic 4×4 or anything from 3×3 to 6×6, with a clock that starts on your first move, a daily board that is the same for everyone, and hints that follow a shortest solution on 3×3 and 4×4. Play 15 Puzzle free in your browser — no download, no account.
Tap any tile in the gap's row or column and the whole run slides at once, or swipe, or use the arrow keys — and the clock only starts on your first move. Every board is dealt solvable; on 3×3 and the classic 4×4 the hint is the next move of a shortest solution, Show the solution plays one out, and a solved board tells you the fewest moves it could have taken. On 5×5 and 6×6 the hint teaches the row-then-column method people actually use. Either way it shows one tile at a time and never moves it for you. No ads, no account, and the same 4×4 for everyone each day.
How You WinPut every tile back in order, left to right and top to bottom, with the gap in the bottom-right corner. The clock starts on your first move and stops when the last tile lands.
On a phone the hint, restart and new game buttons are in the bottom bar, and the button at its left picks the size.
It is free, with no download, no account and no ads. It runs in any phone or desktop browser, and a game you leave half-done is still there when you come back in the same browser.
No. Klotski (Huarong Road) has ten pieces of different sizes and the goal is to get one big block out. The 15 Puzzle has same-sized numbered tiles to put back in order. Both are sliding puzzles, which is why the names get mixed up.
3×3, 4×4, 5×5 and 6×6 in Free play; 4×4, the classic fifteen tiles, is the default and the Daily. On a phone even 6×6 tiles stay a comfortable size to tap.
No. Half of all arrangements can never be solved, so every board is checked before it is dealt. The famous one with 14 and 15 swapped is one of the impossible half, and you will never be given it.
Yes. Tap or swipe the tiles; the hint, restart and new game buttons sit in the bottom bar, and the button at its left picks the size or the Daily.
A 3×3 is never more than 31 moves from solved. The hardest 4×4 positions need 80 single-tile moves, and a random 4×4 is usually around 50 moves from solved at best.
Solving by rows and columns takes more moves than the shortest line — typically about 90 on 4×4 — but it always works and is easy to learn.
Tap any tile in the gap's row or column: it slides toward the gap, and so do the tiles between, so one tap can move a whole row. You can also swipe a tile toward the gap. On a keyboard, the arrow keys move the tile that slides that way: ← slides the tile right of the gap into it.
Every tile that slides is one move, so a tap that pushes three tiles counts three. That is the usual speed-solving count, and it keeps a one-tap row push and three single taps equal.
Every board dealt here can. Exactly half of all arrangements can never be solved — swapping any two tiles of a solved board makes one — so boards are shuffled at random and then checked for the right parity before you see them.
On 3×3 and 4×4 it shows the next move of a shortest solution, and Show the solution plays the rest (not on the Daily, which everyone plays and shares); the first 4×4 hint can take a moment while the shortest solution is worked out. On 5×5 and 6×6 it teaches the method people use: finish the top row, then the left column, then the next row in, until a 3×3 is left. The tile to move glows and the line above the board names the goal.