Sudoku devotees can spice up their solving with these three fun twists on the popular puzzle!

Enjoy a trio of great mental treats, including Flower Sudoku, where innovative interlocking grids form a flower shape; Outside Sudoku, which begins with the numbers outside the grid; and Consecutive Sudoku, which uses dark lines to separate neighboring cells whenever they contain consecutive numbers.

Cutting-Edge Sudoku is just the challenge fans have been looking for!