Sudoku

The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a unique solution. ★ 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. ★ This app contains different levels (Easy , medium and hard) according to the user. ★ User Friendly : Fine GUI.