This versiob is ad-free. Free version of the game with advertising is also aviable.

Sudoku is a logic-based number-placement puzzle. The objective is to fill a 9 9 grid with digits so that each column, each row, and each of the nine 3 3 sub-grids that compose the grid (also called boxes , blocks , regions , or sub-squares ) contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid.