Sudoku
Simon Tatham
Plays on mobile
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Place the digits 1 to 9 exactly once in every row, column and box. This version generates an endless supply of grids that can be solved by logic alone, from trivial to fiendish, plus variants with diagonal rules or jigsaw-shaped regions.
Pencil marks and unlimited undo make even the toughest puzzles a pleasure.
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Step 1: Select a square and type a digit on the keyboard or the on-screen keypad; Erase or Backspace clears it.
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Step 2: Right-click (long press on touch) puts a square into pencil mode so you can jot down candidate digits.
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Step 3: You can also move around with the arrow keys.
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Step 4: On touch screens a tap acts as a left click, a long press as a right click and a drag as a mouse drag.
- Keyboard
- Mouse
- Touch
Keyboard
- Move
- Bksp Other keys
Mouse
- Right click
Touch screen
- Tap
Once the game starts, its controls are also shown on screen.
Full instructions
Select a square and type a digit on the keyboard or the on-screen keypad; Erase or Backspace clears it. Right-click (long press on touch) puts a square into pencil mode so you can jot down candidate digits. You can also move around with the arrow keys. On touch screens a tap acts as a left click, a long press as a right click and a drag as a mouse drag.
Credits and license
- Developer
- Simon Tatham
- License
- MIT
- Source
- chiark.greenend.org.uk/~sgtatham/puzzles/
- Attribution
- Sudoku is part of Simon Tatham's Portable Puzzle Collection, copyright 2004-2024 Simon Tatham and contributors (MIT licence, full text in LICENCE).
This game is hosted under the terms of its license.
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