Discover expert-level Sudoku, learn to spot them, get solving tips, and play the hardest puzzles online for free.
Sudoku is a renowned brain game that requires strong reasoning skills and intense concentration. Whether you are a beginner or a seasoned player, you’ve probably asked yourself: “Is there a Sudoku puzzle so difficult that only an expert can solve it?”
The answer is yes, it’s called expert-level Sudoku, the highest challenge that every Sudoku enthusiast should try at least once!
What is expert-level Sudoku?
Expert-level Sudoku puzzles contain very few given numbers (hints), typically only 17–23 filled cells in the entire 9×9 grid.
This makes logical deduction significantly more difficult:
- Guessing doesn’t work – every move must be carefully calculated.
- Advanced solving techniques are required, such as:
- Handling “Hidden Pairs,” “X-Wing,” “Swordfish,” “Coloring,” etc.
- Applying multi-layer elimination logic.
- Long-term strategic thinking to avoid dead ends.
How to recognize an expert-level Sudoku?
A Sudoku puzzle is considered “expert” when:
- It has fewer than 25 given cells.
- Basic solving techniques (like simple number placement) are no longer effective.
- Advanced reasoning skills or pencil notes for each cell are needed.
If you find yourself taking extensive notes, retracing steps, and “looping through logic,” it’s very likely you are facing an expert-level Sudoku.
Where to play expert-level Sudoku for free
Today, many websites and apps allow you to play Sudoku online at all difficulty levels – from easy, medium, and hard to expert.
You can try https://sudoku.com.vn/en/ – play expert-level Sudoku for free, with a timer and progress-saving features.
Tips to conquer expert-level Sudoku
If you want to master the hardest level, try these tips:
- Take clear notes: mark all possibilities for each cell.
- Continuously scan rows, columns, and blocks to eliminate options.
- Avoid guessing: one wrong step can ruin the entire puzzle.
- Practice daily with medium to hard puzzles before attempting expert-level.
Expert-level Sudoku is not just a game – it’s a high-level mental challenge that strengthens your logic, focus, and patience.
If you love challenges and want to push your limits, try expert-level Sudoku today and see how far you can go!
