Numbers · Logic · 1 player
Sudoku
Fill the grid with numbers 1 through 9 so every row, column, and 3×3 box contains each digit exactly once. Choose a difficulty, make pencil notes, and ask for a hint when you need one.
5–20 min Best times Touch + keyboard 3 hints
Cell selected.
How to play Sudoku
01Choose a cell
Select an empty cell, then use the number pad or your keyboard to enter a digit from 1 to 9.
02Avoid repeats
Every row, column, and 3×3 box must contain the digits 1 through 9 exactly once.
03Use pencil notes
Turn on notes to keep track of possible numbers before committing to an answer.
Number logic puzzle
About Sudoku
Sudoku is solved through logic rather than arithmetic. Place digits 1 through 9 so each row, column, and 3 by 3 box contains every digit exactly once, using notes to track candidates on harder boards.
Tips for a better game
- Start with rows, columns, or boxes that already contain the most digits.
- When a candidate appears in only one cell of a group, that cell is forced.