**Sudoku** is a logic puzzle with simple rules and challenging solutions.

**The rules** of sudoku are simple.
You have to enter a numerical digit from 1 through 9 in each cell of a 9x9 grid made up of 3x3 regions, starting with various digits given in some cells.
Each row, column, and region must contain only one instance of each numeral.

- 3x3 Sudoku Basic
- 3x3 Sudoku Easy
- 3x3 Sudoku Intermediate
- 3x3 Sudoku Advanced
- 3x3 Sudoku Extreme
- 3x3 Sudoku Evil
- 3x4 Sudoku
- 4x4 Sudoku

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