Sudoku Online
Fill the grid so every row, column and box has the numbers 1 to 9, with a daily puzzle and four levels from Easy to Expert.
How do you play Sudoku?
Sudoku is played on a 9 by 9 grid with some numbers already filled in. Fill every empty square with a number from 1 to 9. Each row, each column and each 3 by 3 box must contain every number exactly once. Use logic to find where each number goes. No guessing is needed.
Sudoku rules
- The grid has 9 rows, 9 columns and nine 3 x 3 boxes. Some numbers are already filled in.
- Fill every empty square with a number from 1 to 9.
- Each row, each column and each 3 x 3 box must contain every number from 1 to 9 exactly once.
- Every puzzle has exactly one solution, and you can always find the next number by logic.
- A wrong number counts as a mistake. After three mistakes, you can watch a short ad for one more chance.
Sudoku tips
- Start with the rows, columns and boxes that have the most numbers filled in.
- Pick one number and scan the grid for boxes where it can go in only one square.
- Switch Notes on and pencil in the numbers a square might take. Remove a note when that number is placed nearby.
- Tap a square to light up its row, column and box. This makes it easier to see which numbers are missing.
- Do not guess. Every puzzle here can be solved by logic alone.
More ways to play Sudoku
Sudoku questions
What are the rules of Sudoku?
Fill the 9 by 9 grid so that every row, every column and every 3 by 3 box contains each number from 1 to 9 exactly once.
Is there a new Sudoku every day?
Yes. The Daily puzzle changes every day and is the same for everyone that day. You can also play as many Easy, Medium, Hard and Expert puzzles as you like.
Does every Sudoku have only one solution?
Yes. Every puzzle here is checked to have exactly one solution, and it can be solved by logic without guessing.
What is the difference between Easy and Expert Sudoku?
Easy puzzles have more numbers filled in and need only simple steps. Expert puzzles have fewer numbers and need harder techniques like pairs and pointing.
How do pencil notes work in Sudoku?
Switch Notes on, then tap a square and a number to pencil it in as a small note. Notes help you track which numbers a square might take.
Can I get a hint in Sudoku?
Yes. If you are stuck, you can watch a short ad and one square is filled in for you. There is also an undo button.
Is my Sudoku puzzle saved if I leave?
Yes. Your puzzle is saved automatically, so you can leave and come back at any time.
Is Sudoku on PlayZoneMasti free, and does it use real money?
It is free and never uses real money. There are no deposits, no cash prizes and no betting.
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