"#Sudoku" 

class board:
     def __init__(self, difficulty):
          self.board_size = 9
          self.difficulty = difficulty

          self.board = self.make_new_board()


     def make_new_board(self):
          # No duplicate per row
          # No duplicate per col
          # No duplicaten per 3x3
          pass

def play(difficulty=35):
     # Create board
     # Take input form user
     # Display results

     pass