**Aim of Sudoku:**

Fill in the grid so every possible value appears exactly once in every group. The following variations are available:

- Classic Sudoku - Put each of the digits 1-9 in every row, column and 3x3 inner group.
- Sudoku Extra - Like classic sudoku but with 4 extra inner groups.
- Extreme - Put each of the digits 1-8 in every row, column, diagonal and both 4x2 and 2x4 inner groups.
- Squidgy - Put each of the digits 1-9 in every row, column and the 9 variously shaped inner groups.
- Mini - Put each of the digits 1-6 in every row, column, diagonal and 3x2 inner group.
- 12x12 - Put each of the digits 1-9 and letters A-C in every row, column, diagonal and 4x3 inner group.

**How to play Sudoku:**

There are two ways you can specify values for a square in the puzzle grid:

- Position the mouse pointer over the square you want to set. Click the left mouse button. From the popup window you can select the value - or a number of possible values - for the square.
- Position the mouse pointer over the square you want to set. Press the appropriate key on your keyboard for the value you want to set the square to.

**Puzzles like Sudoku:**

If you like

**Sudoku**you might enjoy Futoshiki or any of our other puzzles like sudoku.