Sudoku is a handy way to test your Sudoku skills. Whether you're a Sudoku guru or you're playing Sudoku for the first time in your life, the rules are simple. At the beginning of the game, you will have a grid divided into nine squares of 3x3 cells each. Some cells are already filled with numbers. Your task is to fill the entire grid with numbers from 1 to 9 so that the same numbers do not occur in one line, row or square. Play Sudoku and have good luck!