Sudoku is a thinking game consisting of numbers. Sudoku starts out with a board of 9 by 9 squares partially filled. The 9 by 9 blocks on the sudoku board is sub-divided in 9 different 3 by 3 blocks.
What is the rules of Sudoku?
When solving a sudoku puzzle, the following rules apply:
Each 3 by 3 block should contain the numbers 1 to 9.
Each row should contain the numbers 1 to 9.
Each column should contain the numbers 1 to 9.
Play free online web Sudoku
Fill in the gray blocks in the sudoku puzzle below and click "Check progress!". New printable sudoku puzzles can be obtained by clicking the level of difficulty at the top of the sudoku puzzle.
