Easy boards
Easy Sudoku boards are built for warm-up play. They contain more given numbers and usually allow progress through scanning rows, columns and boxes. Start here if you want to practise basic elimination without needing advanced notation.
Daily Sudoku
Sudoku
Choose from 45 starter Sudoku boards across Easy, Medium, Hard, Expert and Extreme. Keyboard and on-screen number entry both work.
How to play Sudoku
Fill the 9×9 grid so every row, column and 3×3 box contains the numbers 1 to 9 exactly once. Click a square and type a number on your keyboard, or use the on-screen number pad on mobile.
Use Easy boards to warm up, Medium boards to practise scanning, Hard boards for candidate elimination, and Expert or Extreme boards when you want a slower logic challenge.
Sudoku strategy tips
- Start with rows, columns or boxes that already contain the most numbers.
- Look for singles: cells where only one number can fit.
- Use cross-checking before guessing; a valid Sudoku should have a logical path.
- When stuck, pause and scan each missing number from 1 through 9.
Sudoku difficulty guide
| Level | Best for | What changes |
|---|---|---|
| Easy | Beginners and daily warm-ups | More givens and simple row/column scans. |
| Medium | Regular players | More box logic and fewer obvious singles. |
| Hard | Focused solving sessions | Requires candidate tracking and multi-step elimination. |
| Expert | Experienced players | Fewer givens and more hidden singles/pairs. |
| Extreme | High-difficulty practice | Designed to take patience and careful checking. |
Sudoku FAQ
Can I play with the keyboard?
Yes. Select a square and press 1–9. Backspace, Delete or 0 clears an editable square. Arrow keys move around the grid.
Should I use hints?
Hints are useful when learning, but harder puzzles are more rewarding if you use them only after checking every row, column and box.
Are the boards timed?
The current board can be played at your own pace. The site focuses on steady solving, local progress and difficulty variety rather than pressure.
What makes Extreme different?
Extreme boards are intended to require slower scanning and more candidate thinking. They are still meant to be fair and solvable.
Sudoku difficulty guide
Medium and Hard boards
Medium and Hard boards require a more deliberate process. Use notes, check each 3x3 box for missing digits, and look for pairs that restrict where a number can go. Do not guess unless you can recover from a mistake.
Expert and Extreme boards
Expert puzzles are slower by design. They reward patient notation, locked candidates and re-checking assumptions. Extreme puzzles are intended to be completed carefully rather than quickly.
How to solve without guessing
A good Sudoku solve starts with certainty. Scan for digits that are already common on the board, then check each row, column and 3x3 box for the only legal place a number can fit. If a number can fit in several places, leave notes rather than forcing an answer.
When the board becomes harder, compare boxes in the same band or stack. If a candidate can only appear in one row inside a box, that row can often remove the same candidate elsewhere. These small restrictions build momentum and keep the solve logical.
Keyboard and mobile play
Click or tap a square, then use the number buttons or keyboard digits. Backspace, Delete or 0 clears a selected cell. Arrow keys move the active square on desktop. On mobile, the number pad stays visible so the puzzle can be played without a physical keyboard.
The hint button reveals one safe value when you are stuck. For practice, try to explain why the hinted number is correct before moving on; that turns a hint into a learning moment rather than a shortcut.
Sudoku FAQ
Are the Sudoku puzzles unique?
The boards are curated for the current free version and grouped by difficulty. They are designed to have a clear solution path rather than being random filled grids.
What should I do if I make a mistake?
Use the check button to find incorrect cells, clear them and return to notes. Re-check the affected row, column and box before entering another value.