Classic Master Sudoku

Classic Master Sudoku is a type of game or number puzzle that is quite popular. Many people, both young and old, play this game just to fill their free time or with the aim of sharpening their brain a little. Even though it is classified as an old school game, in fact up to now sudoku enthusiasts are still emerging and increasing. Sudoku, originally called Number Place, is a logic-based combinatorial number placement puzzle. In classic sudoku, the goal is to fill a 99 grid with numbers so that each column, each row, and each of the nine 33 subgrids that make up the grid also called squares, blocks, or regions contains all the numbers from 1 to 9. In sudoku there are usually several grids that are already partially filled, which can then be used as a guide to complete the filling. French newspapers featured variations of the Sudoku puzzle in the 19th century, and the puzzle has appeared