Sudoku X is an addictive logic puzzle. If you are a fan of puzzles, you will definitely like this game. The rules of the game are very similar to the rules of Sudoku, but with some changes. Your goal is to fill a 9 by 9 square with numbers, but so that the following conditions are true, Each column must have unique numbers. Can you solve the puzzle? Enjoy playing this Sudoku game here at Y8.com!