Windoku

Even more fun than regular Sudoku! Windoku (also called Hypersudoku) is a fun new variation of Sudoku. Windoku shares all the rules of regular Sudoku, namely every row, column, and block must contain the numbers 1-9, but adds 4 additional shaded regions that must also contain the numbers 1-9. These puzzles have been specially selected as average difficulty based on feedback from our iSolvePuzzles Twitter and Facebook social media followers. All the puzzles can be solved by simple Sudoku rules and have a single unique solution. Puzzles are printed EXTRA LARGE and away from the book's spine with wide inside margins. Looking for free puzzles? Our puzzles are always freely printable at isolvepuzzles.com/print from our database of over 100 trillion puzzles.