Do you have a website and would like to offer your visitors a Sudoku game as well. All you have to do is insert HTML code inside the body tags of your website. The objective of Sudoku is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution. Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice in the same 9x9 playing board row or column or in any of the nine 3x3 subregions of the 9x9 playing board. The source code provided by print-sudoku must not be changed in any way without permission of print-sudoku.