A Sudoku is a puzzle involving a 9x9 grid into which the numbers one to nine must be placed. The catch is that each row, column and 3x3 box has to contain each of the numbers one to nine once ...

Here's how you can use the pattern to your advantage in your next Sudoku. A Sudoku is a puzzle involving a 9x9 grid into which the numbers one to nine must be placed. The catch is that each row, ...