Sudoku 2Go with 10'000 puzzles, 10 different variants, 5 levels of difficulty and a world-class hint engine. All the Sudoku you'll ever need! In addition to the standard Sudoku puzzles it offers these Sudoku variants: X-Sudoku. Hyper-Sudoku. Percent-Sudoku. Color-Sudoku. Squiggly Sudoku and combinations thereof