Sudoku · how to play
Nine rows, nine columns, nine boxes.
The whole game is one rule.
01
The rule
Fill the 9×9 grid so that each row, each column, and each 3×3 box contains the digits 1 to 9 exactly once — no repeats in any row, column, or box.
02
How to play here
Tap a cell, then tap a number (or type it). Use Notes to pencil in candidates for tricky cells, and Check to catch mistakes. Given digits are fixed; the ones you place can be changed or erased.
Interactive
Fill the last cells together
Step 1/3:Look at row 5 (the center row). It's missing 3 digits. Check column 5 + the 3×3 box to find what fits in position 5,5. The answer is 8. Tap that cell and enter 8.
Next: Sudoku strategiesNaked single · Hidden single · Naked pair — solve faster, never guess.