How to Play
Click or tap on any tile adjacent to the empty space to slide it. Arrange all numbers from 1 to 15 in order, with the empty space in the bottom-right corner. Use arrow keys on desktop for faster control. The puzzle starts timing when you make your first move.
Rules
- 1.The puzzle consists of a 4x4 grid with 15 numbered tiles and one empty space.
- 2.Only tiles adjacent to the empty space can be moved.
- 3.The goal is to arrange all tiles in numerical order (1-15) with the empty space in the bottom-right corner.
- 4.Try to solve the puzzle in as few moves as possible and beat your best time.
Tips & Strategy
- •Solve the top row first (1, 2, 3, 4), then the second row (5, 6, 7, 8).
- •For the bottom two rows, work on them together, solving the left columns first.
- •Learn the 'rotate' technique for placing tiles in corners without disturbing others.
- •When stuck, try moving tiles in a circular pattern to reposition them.
- •Plan several moves ahead - rushing leads to more moves and longer times.
- •Practice the 8 Puzzle first to master the basics before tackling the 15 Puzzle.
A worked example
A fixed teaching position, separate from your current game.
| 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 |
| 13 | · | 14 | 15 |
| 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | · |
The upper rows are already complete. Tap 14, then 15, to move each tile into the neighboring blank. The board is solved without disturbing those rows. A tempting diagonal tile cannot move: only a shared edge makes a legal move in this version.