This is my version of the well-known game called Sudoku. It contains many options to learn and improve yourself in this game. There is a Hint button that fills up the highlighted spot with the correct answer for a time penalty depends on the numbers of the remaining empty field. Check button is to see that the numbers what you have entered are correct, if you made a mistake it will increase your number of mistakes. The goal is to solve the riddle as fast as possible with the least mistakes. Have fun! Thanks for your support!