Medium Sudoku
About 34 starting digits. Notes start to help.
- Time
- 0:00
- Mistakes
- 0
About Medium Sudoku
Medium puzzles start with around 34 filled cells. Scanning gets you most of the way, but you will hit spots where you need to keep track of candidates. Medium puzzles reward pencil marks. Note the candidates in a cell, then look for cells with only one option left.
How to play
Fill the grid so every row, every column and every 3x3 box contains each digit from 1 to 9 exactly once. Some cells are filled in to start, and there is only one correct solution.
Tap a cell, then tap a number. Turn on Notes to pencil in possible digits, and use Undo if you change your mind. A digit that breaks the solution is shown in red. On a keyboard, use the arrow keys to move, the number keys to fill, N for notes, H for a hint and Z to undo.
Tips for this level
- Turn on Notes and write the possible digits into cells that have two or three candidates.
- A cell with a single remaining candidate is a naked single. Fill it, then clear that digit from its row, column and box.
- If a digit can only sit in one row of a box, it cannot appear in that row in the neighbouring boxes.
New puzzles are generated in your browser and checked to have a single solution, so you can play as many as you like. Your progress is saved on this device. New to the game? Read how to play Sudoku.