Sudoku
About Sudoku Unblocked
Sudoku unblocked is available to play for free online. Sudoku is the timeless number-placement puzzle that challenges logic and concentration. Fill a 9×9 grid so each row, column and 3×3 box contains the numbers 1 through 9 without repetition. With multiple difficulty levels and increasing challenge, Sudoku offers an ideal mental workout and calm, focused gameplay for puzzle lovers of all ages.
Game Screenshots
How to Play
- Select a cell then choose a number 1–9 to place.
- Use pencil mode to mark candidate numbers for complex cells.
- Apply elimination and scanning strategies to narrow down options.
- Double-check each placement to avoid conflicts with row, column or box.
- Complete the grid so every row, column and 3×3 box contains numbers 1 through 9 exactly once.
Game Features
Use logic and deduction to fill numbers correctly across rows, columns and boxes.
Choose easy to expert puzzles to match your skill and sharpen logic.
Mark possible numbers in a cell before committing — helps solve harder puzzles.
No pressure or time — ideal for calm, thoughtful puzzle solving.
Track completed puzzles and gradually improve speed and accuracy with practice.
Game Tips & Strategies
- Start with easier puzzles to learn patterns and build confidence.
- Use pencil marks to note all possible candidates before deciding.
- Scan rows, columns and boxes systematically to identify single candidates.
- Avoid guessing — rely on logic to prevent mistakes and contradictions.
- Take regular breaks — fresh eyes often spot overlooked placements.
Last Updated: December 4, 2025
Game Rating: 4.6/5 | Category: Puzzle, Sudoku, Number | Platform: Web Browser
