How to play Sudoku
Sudoku is a logic puzzle: fill the 9×9 grid so every row, column and 3×3 box contains the digits 1 to 9 exactly once.
Practise with Easy SudokuThe three rules
- Each row must contain 1 to 9 without repetition.
- Each column must contain 1 to 9 without repetition.
- Each 3×3 box must contain 1 to 9 without repetition.
A simple way to begin
Scan a row, column or box and identify which digits are missing. Compare the crossing rows and columns to eliminate impossible positions. Place a number only when one position remains.
If a square has several possibilities, use notes to record its candidates. As nearby numbers are solved, remove candidates until the answer becomes certain.
Remember
Sudoku does not require arithmetic. The digits are symbols, and every answer should follow from logic rather than guessing.