If you're a fan of the new Sudoku puzzles that are sweeping the country, or would like to learn about these fascinating puzzles, you'll really enjoy our new Sudoku Challenge. With a single click, you can create your own puzzles with up to 5 levels of difficulty. You can solve puzzles on-screen, with no need for a pencil and eraser, print puzzles and lots more 5 levels of difficulty (Very Easy, Easy, Medium, Hard, Very Hard). Print puzzles to solve away from the computer. Solve the puzzles on screen. Save and load puzzles. Pencil marks to help you in solving the puzzles. Top 10 High Score List for each level of difficulty. Billions of puzzle combinations generated by the computer Customizable menu position (Left or Right) Select from 10 soothing background music tracks (Toggle on/off). Built in sound effects (Toggle on/off).