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Sudoku Master
Free · no download · phone, tablet & desktop
Sudoku Master
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Sudoku Master is a clean, paper-and-ink take on the classic number puzzle. Every board is generated the moment you press play, with a guaranteed unique solution and a difficulty graded by the logical technique it genuinely requires — from Naked Single all the way up to X-Wing. Pick Easy, Medium, Hard, Expert or Evil, or take the Daily Challenge that ramps from a gentle Monday to a brutal weekend, the same puzzle for everyone. Pencil-mark notes with automatic clean-up, three mistake-highlighting modes (including a purist off switch), and a hint button that names and explains the next logical step so you actually learn the techniques. Light paper, dark and sepia themes, full keyboard play, undo, auto-save and an optional three-mistake mode round it out. No download — solve instantly in your browser.
- ChoosePick a difficulty from Easy to Evil, or the daily challenge.
- FillPut 1–9 in every row, column and 3×3 box exactly once.
- NotesUse pencil notes for possible numbers.
- FinishComplete the grid without mistakes.
Phone & tablet
- Select a cell
- Tap
- Enter a number
- Number pad
Keyboard & mouse
- Move
- Arrow keys
- Enter a number
- 1–9
- Erase
- Backspace
- Look for cells with only one possible number first.
- Keep notes tidy after every entry.
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Is Sudoku Master free to play?
Yes. Sudoku Master is free on YoHU.io. Ads keep the site free; there are no paywalls inside the game.
Can I play Sudoku Master on my phone?
Yes. It runs in Safari and Chrome on iPhone and Android, and on tablets. Tap Play and the game fills the screen.
Do I need to download anything or sign up?
No. The game runs in your browser. An account is optional and only keeps your favorites and best scores on every device.
Is my progress saved?
Your best score and favorites are saved on this device automatically. Log in to keep them across devices and enter the weekly leaderboard.
How do I play in full screen?
Use the Full screen button under the game, or the corner button inside it. On iPhone the game covers the whole browser window instead, because iOS limits full screen for web pages. Add YoHU.io to your Home Screen for an app-like full screen.
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