code: def question_field(self, move_x, move_y):
          
          field_status = self.info_map[move_y, move_x]
  
          # a questioned or undiscovered field
          if field_status != 10 and (field_status == 9 or field_status == 11):
              self.info_map[move_y, move_x] = 10
docs: Question a grid by given position.