Sudoku - Time pass Game

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 contains all of the digits from 1 to 9.Features:3 levels: easy, medium, difficultPencil marksHints to help you complete hard onesAuto-saveMore puzzles will be coming soon!