Sudoku Plus 16x16, biggest & difficult

Free!!! The most popular logic-based numbers game. Support: Phone & Pad Game Rule: In each row、each column、each grid、each slash, each number can only appear once Features: -Play 4x4, 9x9 and 16x16 Sudokus -Hints to help you complete hards ones -Pencil marks -Auto save -3 levels (easy, medium, hard)