Readmesoft Sudoku for Windows supports Print to Paper, Help tips, Save and Load status, Verify result, and 5 game level. You can not only run this game on your computer, but also print it out to paper and play the game on trip at any time! Sudoku is one of the most popular games in the world having hit feverish heights in Japan, Europe, and now the US. The rules of Sudoku are simple. Enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3 square. Each Sudoku has a unique solution that can be reached logically without guessing.