☁ Thinking Clouds
Sudoku
Fill the grid so every row, column, and box holds the numbers one through nine.
Sudoku
Free to play in any modern browser · works on desktop and most phones
How to play Sudoku
Fill the 9×9 grid so that every row, column, and 3×3 box contains each number from 1 to 9 exactly once. Some numbers are given to start; use logic to work out the rest.
Controls
- ☁Mouse or touch: click a cell, then choose a number
- ☁Keyboard: type a number into a selected cell
Tips
- ✦Look for rows, columns, or boxes that are almost full.
- ✦If a number can only go in one place in a box, it must go there.
- ✦Never guess — every puzzle can be solved by logic.
