This popular, even more challenging variant of sudoku is for true puzzle warriors Each one consists of FIVE sudoku grids arranged in an Xshaped array, with overlapping corners No grid can be solved on its own to complete the entire puzzle, players have to work on several grids at once, making their way to overlapping areas and constantly searching for new clues While regular sudokusolving techniques provide the starting point, the game8217s more complicated than that Because the overlapping areas belong to two different grids, they must comply with the rules of both simultaneously That changes the puzzle8217s underlying logic8230and makes these sudokus more fun for the serious fan An introduction, with a sample puzzle, shows all the strategies