Sudoku is a relaxing thing game. The objective is to fill each box with a number ,but not any number, a number that corresponds with that box. The rules are you can not have more then one of every number in each column, row or, 3 by 3 box. Depending on the difficulty of the puzzle the harder it is to figure out the numbers. For instance this one is about average level.Personally I like doing the hardest one there.
Sudoku link here
