It's Sudoku.
Categories: BRAIN Sudoku Like
450 classic Sudoku puzzles leveled from 1 to 9, 50 puzzles per level. Smart number pad and duplicates check options for easy operation. Sudoku is a logic based puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids that compose the grid contains all of the digits from 1 to 9.
Size: 577k; Requires Android : 3 and up. pname=cn.bluesky.sudoku .apk