Sudoku Master
Sudoku Master
Our free daily · new every day Sudoku A fresh grid every day, at five levels Play Sudoku Master sticks to the traditional rules that made sudoku popular in the first place: a 9x9 grid split into nine 3x3 boxes, and every row, column, and box needs to end up with the numbers 1 through 9 with no repeats. There's no twist on the format here - just a clean board, a number pad for entering digits, and puzzles arranged by difficulty so you can start with something gentle and work up to grids that take real concentration. Because the rules are so well known, it works equally well as a short mental break or a longer sit-down session, depending on which difficulty you pick. If you already know sudoku, the interface won't need any explaining; if you're newer to it, the puzzle enforces the rules as you go, so you'll notice quickly when a placement breaks a row, column, or box.
How to play Sudoku Master
How to Play
- Select an empty cell on the 9x9 grid.
- Enter a number from 1 to 9 using the on-screen number pad.
- Make sure that number doesn't already appear in the same row, column, or 3x3 box.
- Use the notes option to pencil in candidate numbers for a cell before you're sure which one belongs.
- Keep filling cells until the grid is complete and every row, column, and box has all nine digits.
Tips and strategy
Strategy
- Start with rows, columns, or boxes that already have the most numbers filled in - they leave the fewest open options.
- Use notes to track which numbers could still go in a cell, then look for cells where only one candidate remains.
- Scan for a number missing from a box that already appears in most of the rows and columns crossing it - that often narrows it down to one cell.
- Work through easier difficulties first if you're rusty; the same scanning techniques carry over to harder grids.
- Check a placement against its row, column, and box before moving on, rather than fixing mistakes later.
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Frequently asked questions
What are the rules of Sudoku Master?
Fill the 9x9 grid so every row, column, and 3x3 box contains the numbers 1 through 9 exactly once, with no repeats.
Can I choose the difficulty?
Yes, puzzles are offered at different difficulty levels, from easier grids with more starting numbers to harder ones with fewer clues.
What are notes used for?
Notes let you pencil in more than one possible number in a cell while you're still working out which one actually belongs there.
Can I undo a number I've placed?
You can clear or change a number in a cell before it's locked in, which makes it easy to correct a placement you've reconsidered.
Do I need sudoku experience to play?
No - the rules are simple to learn, and the puzzle stops you from placing a duplicate number in the same row, column, or box.