Sudoku X puzzle 137 - Hard Sudoku X 16x16

Posted on June 12, 2017

Looking for free online Sudoku X puzzles? Today we have another Sudoku X puzzle for you. It will give you a couple of minutes of entertainment.

How to play Sudoku X: The goal of Sudoku X is to fill in the empty cells, one number in each, so that each column, row, region, and the two main diagonals contain each number exactly once.