Extreme Sudoku
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About extreme sudoku
Extreme Sudoku is the hardest level we offer: near-minimal grids with as few starting numbers as a unique solution allows. These boards are relentless.
Only take these on when you want a real fight. With patience, complete pencil marks, and sharp technique, every Extreme puzzle can be solved — but it will make you earn it.
Tips
- Turn on Notes to pencil in candidates, then eliminate them as you place numbers.
- Scan one digit at a time across the whole grid to find where it fits.
- Use the Hint button to learn the next logical step, not just the answer.