Sudoku-Online games Sudoku

Exercise your brain where ever you go with a free Sudoku puzzle game now with 4 levels of difficulties easy, medium, hard, and crazy. Each difficulty contains several puzzle packs and each pack contains 300 puzzles now. Total1200 brain Sudoku puzzles. Fill the 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids contains all of the digits from 1 to 9 now! Features: 1、More than 1,200 well-posed puzzles. 2、4 levels of difficulties Easy, medium, hard, and crazy. 3、Highlighting of a row and column related to the selected cell. 4、Highlight Duplicates to avoid identical numbers in a row, column, and sub-grid. 5、Use Hint where you are stuck in-game. 6、Use Pencil to make notes. 7、3 undo chance，unlimited redo. 8、Eraser to get rid of mistakes made. 9、Achieve different achievements.