Here is a new version of the famous math puzzle! The goal is simple, fill the grid with the numbers 1 to 9. Each number must appear only once on each row, each column and each square of 9 boxes. In this version of sudoku, you have to solve the greatest number of puzzles from the simplest level up to the grand master level! You also have an option to take part of a championship. Click on a number at the bottom of the grid to write it in the chosen box. You can use the helping system when you are blocked.