About Sudoku Online

In the mood for a puzzle game? Sudoku Online is ready the moment the page loads — free and instantly playable. It is the kind of game where one clever move can untangle a board that looked hopeless. On mobile the game switches to touch controls, so your progress is never tied to a desk. It is also unblocked here, so it runs fine on school or office networks.

How to play Sudoku Online

Work out the logic of each layout and solve it before you run out of options. On mobile, the on-screen touch controls take over — tap / drag — play. Give yourself a round or two to warm up — the difficulty ramps up quicker than it looks.

• Mouse select a cell and place digits 1-9
• Notes mode track candidates

Tips to get better at Sudoku Online

• If you are stuck, look for the move that frees up the most space rather than the quickest win.
• Work from the constraints first — the parts of the puzzle with the fewest options.
• Scan the whole board before your first move — the obvious play is not always the best one.