How to play

The sudoku grid consists of eighty-one squares in a nine by nine grid. To solve the sudoku, each square in the grid must contain a number between one and nine, with the following conditions:

• Each row of nine cells must contain each of the numbers from 1 to 9 once and only once.
• Each column of nine cells must contain each of the numbers from 1 to 9 once and only once.
• Each of the nine 3 by 3 boxes of nine cells must contain each of the numbers from 1 to 9 once and only once.

The sudoku starts with a partially filled grid and you must complete the grid while following the rules above. If you complete the grid, you've solved the sudoku.

Each sudoku on this site has one and only one unique solution.

Some people like to write small pencil numbers in each cell to indicate what numbers are possible in that cell. If you fill all the cells with their possible values, the answer may quickly become apparent. Particularly if some cells only have one possible value. Such cells are called an "Open Single". A tutorial on finding and using open singles to solve a sudoku can be found here.

For a guide on playing our sudoku view the user guide.

For hints on how to solve sudoku view the sudoku tutorials.

Happy puzzling.