RulesUpdated 04 Nov 2026
Sudoku rules on ComCom Games
ComCom Games, the online gaming platform for players in Bangladesh, has Sudoku as a solo friendly: just you and a fresh puzzle, made when you start it. Every rule below is enforced automatically by the server, and the answer never leaves it.
- Players
- 1 (solo)
- Levels
- Easy, Medium, Hard
- Clock
- 30 min
- Mistakes
- The third ends it
How does a Sudoku puzzle start?
- Open Friendlies in your portal and pick Sudoku.
- Choose Easy, Medium or Hard, and press Play. A new puzzle is made for you.
- The puzzle opens and your 30 minutes start.
What are the rules?
- The grid is 9 by 9, split into nine 3 by 3 boxes. Some numbers are given at the start: more on Easy, fewer on Hard.
- Fill every empty square so that every row, every column and every 3 by 3 box holds the numbers 1 to 9, each once.
- Every puzzle has exactly one solution, so it can always be solved without guessing.
How do you place numbers?
- Tap a square, then a number, or type it on a keyboard. The arrow keys move between squares.
- A right number fills the square. A wrong number is not placed, flashes red, and counts as a mistake.
- Notes mode pencils small numbers into a square while you work it out. Notes are only on your device, and a note disappears once its number is placed in the same row, column or box.
How does it end?
- Fill every square and the puzzle is solved: it counts as a win.
- A third mistake ends the puzzle unsolved.
- If your 30 minutes run out, the puzzle ends unsolved.
- Giving up, with Resign or Exit, ends it unsolved too. Both ask you to confirm first.
For a way to start any puzzle, see How to play Sudoku.
Does it pay ComCom Coins?
Yes. Every puzzle you solve earns ComCom Coins, up to a daily limit, like every friendly win, and counts on the Friendlies tab of the Leaderboard. Sudoku is a friendly only, with no tournaments for now.
Frequently asked questions
- How many mistakes can I make in Sudoku on ComCom Games?
- Two. A third wrong number ends the puzzle unsolved. A wrong number is never placed, so it cannot spoil the rest of your grid.
- How long do I have to solve a Sudoku?
- 30 minutes, from the moment the puzzle opens. Your clock keeps running if you close the tab.
- Is every Sudoku new?
- Yes. A new puzzle is made each time you start one, and every puzzle has exactly one solution.
Ready to play Sudoku?
Play Sudoku as a friendly, any time.