About the 15 Puzzle or Game of 15
The 15 puzzle (also called the Game of 15 or sliding puzzle) is a classic logic game where you slide numbered tiles on a grid to reach a correct final arrangement. It’s easy to learn, surprisingly deep, and endlessly replayable.
What Is the 15 Puzzle?
In its most common form, the puzzle uses a 4×4 board with 15 numbered tiles and one empty space. You can only move a tile by sliding it into the empty space. The challenge is to transform a shuffled board into the solved state.
The Goal
- Arrange tiles in ascending order (1 to 15).
- Place the empty space in the final position (usually bottom-right).
- Use the fewest moves (and/or the best time) if you want to compete with yourself.
Why It’s Harder Than It Looks
- Sliding puzzles require planning, not just local “good moves.”
- Fixing one area can disturb another area if you’re not careful.
- The last row/column often needs a specific sequence of cycles to finish cleanly.
Common Strategies (Beginner-Friendly)
- Row-by-row method: solve the top row, then the next, and so on.
- Work in blocks: keep already-solved tiles together and avoid breaking them apart.
- Use the empty space intentionally: treat it as your “tool” to reposition tiles.
- Practice the endgame: learn how to finish the last two tiles in a row or column.
Templates and Variations
This site focuses on making the game fun to replay by offering different visual templates and board sizes. Whether you prefer a classic look or a modern minimal style, the core logic stays the same: slide, plan, and solve.
Want More?
Interesting Facts About the 15 Puzzle (Game of 15)
A few surprising facts about the 15 puzzle: its history, why some shuffles are impossible, and what makes it timeless.
Why Playing the 15 Puzzle Is Worth It
Improve focus, planning, and pattern recognition with a classic sliding puzzle you can play in minutes a day.
Ready for Game 15?
Jump back into the 15-puzzle board and put these strategies into practice.