You will find a selection of Sudoku puzzles, which are graded according to the level of difficulty using these colours:
Click on the puzzles below. There are two different versions: M. Word and PDF for your preference.
The Sudoku puzzle consists of a 9x9 square grid made up of smaller 3x3 grids. Each 3x3 grid is called a block. When you start a game of Sudoku, some blocks will be pre-filled for you. You cannot change these numbers in the course of the game.
There is only one valid solution to each Sudoku puzzle. The only way the puzzle can be considered solved correctly is when all 81 boxes contain numbers and these Sudoku rules have been followed: