What is Sudoku? Sudoku game is one of best puzzle game. The theme of Sudoku app is to fill a 9x9 grid with numbers/digits so that each column, each row and each of the nine 3x3 sub boxes should compose with the digits from 1 to 9. What is New In Sudoku Classic? 1. Sudoku play - We have three different kinds of Sudoku play modes. a) Sudoku puzzle with Numbers with more than 50Levels. b) Sudoku puzzle with Letters with more than 50Levels. c) Sudoku puzzle with Symbols with more than 50Lev