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)