Sudoku
Fill the 9×9 grid so every row, column and 3×3 box contains each digit from 1 to 9.
Errors
0
Time
0:00
Best
—
Select a cell and enter a number
About Sudoku
Sudoku is the world's most popular logic number puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-boxes contains all of the digits from 1 to 9. The puzzle starts with some digits already filled in as clues.
Controls
- Click a cell — Select a blank cell on the grid to focus it
- Click a numpad button — Enter the number in the selected cell
- Press 1–9 — Enter a number in the selected cell using your keyboard
- Arrow keys — Move the selection to an adjacent cell
- Backspace / Delete / 0 — Erase the number in the selected cell
- Difficulty buttons — Choose Easy (40 clues), Medium (32), or Hard (24)
- Hint button — Reveal one correct cell (3 hints per game)
- New Game button — Start a fresh puzzle
How to Play
- Click a blank cell to select it, then click a number on the numpad (or press a number key).
- Each row, column, and 3×3 box must contain each digit exactly once.
- Wrong entries are highlighted in red.
- Use Hint to reveal one correct cell (up to 3 per game).
- Complete the grid without errors to win!