If you want to include the Sudoku of the day on your website completely free, you simply have to copy the following HTML code and put it where you want it to appear on your website:
You don’t have to worry about anything else, the sudoku will be updated daily without you having to do anything. In addition, the Sudoku image has a transparent background, so it will adapt perfectly to the appearance of your website.
You will see something similar to this:
If your website has a dark background and you want the sudoku to appear correctly, use this other code (the sudoku image appears with a white background):