Sudoku-Classic Brain Puzzles.

Sudoku is a puzzle game. Sudoku is a logic-based, The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid（also called "blocks",） contain all of the digits from 1 to 9.Sudoku can improve your observation ability and reasoning ability. Let's travel to the world of Sudoku together! Game features: -Easy, medium, hard, master, free to choose the difficulty, easy to use, step by step; -Diagonal, OddEven, Irregular, various special modes to challenge yourself; -Daily challenges, new feelings every day; -Relieve stress and exercise your brain, suitable for players of all ages;