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Number Slider

Slide numbered tiles into order — fewer moves means more stars!

0:00
Moves0

Use arrow keys or click/tap tiles adjacent to the empty space.

≤ 60 moves
≤ 120 moves
≤ 240 moves

How to Play

  1. Click a tile next to the empty space to slide it into the gap.
  2. Arrange all tiles in numerical order from 1 to 15, left to right, top to bottom.
  3. Timer starts on your first move and stops when solved.
  4. Choose grid size: 3x3 (easy), 4x4 (classic), 5x5 (expert).
  5. Earn stars by solving in fewer moves. Fewer moves = more stars!
  6. Best scores per grid size are saved automatically.

Tips

●Solve row by row — place the top row first, then work down.
●Work in pairs — position the last two tiles of a row together.
●Corner technique — rotate tiles into place using the corner gap.
●Blue-tinted tiles are already in the correct position.
●Use arrow keys for faster play on desktop.
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Frequently Asked Questions about Sliding Number Puzzle

What is a sliding number puzzle?
A sliding number puzzle (also called the 15-puzzle or slide puzzle) has numbered tiles in a grid with one empty space. You slide tiles into the empty space to arrange all numbers in order. It was invented in the 1870s and remains one of the most popular brain teasers.
How do you solve a sliding number puzzle?
Work row by row from top to bottom. First position the top row tiles, then the second row. For the final two rows, work column by column. The key is learning to move tiles without disturbing ones already in place.
Are all sliding puzzles solvable?
No! Only half of all possible tile arrangements are solvable. Our puzzles are always generated by making random moves from the solved state, so every puzzle you get has a solution.
What grid sizes are available?
We offer 3x3 (8 tiles, great for beginners), 4x4 (the classic 15-puzzle), and 5x5 (24 tiles for experts). Start small and work your way up as you learn the solving techniques.
What's a good solving time?
For the classic 4x4 puzzle, casual players finish in 2-5 minutes. Regular players aim for under 60 seconds. Speed solvers using algorithms can finish in under 20 seconds!

About Sliding Number Puzzle

Sliding Number Puzzle presents a grid of numbered tiles that must be arranged in ascending order by sliding them into the single empty space. Each move shifts one tile at a time, and the challenge lies in sequencing your moves so that progress on one area does not undo work in another. The game starts with a random shuffle guaranteed to be solvable, and your goal is to restore order in as few moves as possible. A built-in timer and move counter let you benchmark your performance and chase personal records. Larger grid sizes dramatically increase the difficulty, as the number of possible states grows exponentially. It is a pure test of logical sequencing that rewards systematic thinking over trial and error.

How to Play

  1. Tap or click any tile next to the empty space to slide it into position
  2. Start by placing the first row of numbers, then work downward row by row
  3. For the final two rows, use circular sliding patterns to avoid disrupting completed sections
  4. Complete the puzzle with all numbers in ascending order to beat the level