KEY POINTS:
Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9.
Tip - If you want to print the Sudoku puzzle, right-click on the Sudoku image and choose the command "Print Picture..." from the appearing pop-up menu.
Doing it this way will create a larger printed version which is easier to read compared to using the Print command from the File menu in your browser.
