Sudoku puzzle is a world famous number brain teaser. Classic sudoku puzzles help you develop your logical and mathematical skills and that is why it is a fun and useful number match game. The rules of classic sudoku are very clear and it is very simple and interesting to play in sudoku. This sudoku can check each step and let you know if you are wrong or you could solve the puzzle by yourself. Sudoku classic puzzle: • Free classic sudoku puzzle with daily updates • Easy and hard sudoku number