These equivalent sets can be very useful for hard Sudokus where all the usual methods aren't getting anywhere,' she added. 'Kind of like in chess, the more openings, defences or other stratagems ...

Once you know these Sudoku tips, you will be able to solve even the most challenging puzzle. What are the basic rules of ...

These equivalent sets can be very useful for hard Sudokus where all the usual methods aren't getting anywhere,' she added.

Starting with iOS 18.2, Apple News+ subscribers in the U.S. have access to daily sudoku puzzles, with easy, moderate, and challenging difficulty levels. A scoreboard tracks your sudoku stats ...

Play our daily hard sudoku here. Plus, you can let us know what you think of the puzzles by emailing at [email protected]. We look forward to hearing from you.