Over 70 different Sudoku types: Samurai, Diagonal, Hyper, More-or-Less, 16x16.
???? Different Sudoku types: Classic, Diagonal, Hyper, More-or-Less
???? Different Sudoku shapes: Single, Double, Triple, Zigzag and Samurai
???? Different Sudoku sizes: 4x4, 6x6, 9x9, 12x12 and 16x16
Multiple difficulty levels: from beginners to masters.