Centre Dot Sudoku
Sudoku where the nine shaded middle cells of the boxes must hold different digits, adding one extra group to the grid.
- Logic
- New puzzle every day
- Free, plays in your browser
- Mouse, touch or keyboard
- Added 29 October 2026
- #sudoku
- #centredot
- #numberpuzzle
- #dailypuzzle
- #logic
- #relaxing
Centre Dot Sudoku
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Loading Centre Dot Sudoku 0%Watch a 20-second trailer
A real run of the game, recorded with captions and no sound.
How to play
- Fill the grid so every row, column and 3 by 3 box holds 1 to 9 once.
- In this variant, the nine shaded centre cells, one per box, must all hold different digits.
- Tap a cell, then a number. Notes mode lets you pencil in candidates. Conflicts show in red as you play.
- Pick Daily for today's puzzle, the same for everyone, or Easy and Hard for fresh ones. Your time is saved when you finish.
Controls: mouse, touch or keyboard. Made by CalcoTools.
Tips and strategy
- The centre cells give you a ninth group. Work out which digits are missing from it.
- A digit already in one centre cell cannot be in the others, which narrows the middle box quickly.
- Start with digits that appear many times on the board.
- Use notes on the centre cells first, because they have the most constraints.
FAQ
- Which cells are the centre dots?
- The middle cell of each 3 by 3 box, nine cells in all, shown in a light tint.
- Is it harder than a classic Sudoku?
- It has one more rule, which usually makes it easier to solve with the same number of clues.
- Is the daily the same for everyone?
- Yes, on the same UTC day.
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