A Sudoku puzzle has 9 (nine) Columns; 9 (nine) Rows and 9(nine) boxes of 3X3 square. To solve a puzzle you should fill the table so that the number from 1 to 9 will be in each Column; each Row and 3X3 Boxes only once Advised by doctors, the Sudoku is excellent if you want to stimulate your brain or occupy a few dead hours.