If you been searching for an on-line game to play? Sudoku, a game of logic and number-placement puzzle could be the perfect game. The game consists of a puzzle that is a partially completed grid, with a unique answer. The goal is to fill a 9x9 grid with 3x3 sub-grids with digits from 1 to 9. However, the same single digit may not appear twice in the same 9×9 playing area row or column or in any of the nine 3×3 sub-grids of the 9×9 playing area. In this guide, you will learn about this game and how it is played along with where you can play this addicting game for free.