Washing machines generally refer to various apparatuses which are constructed to remove pollutants from laundry (or clothes) by chemical actions of water and determent, physical actions of rotating an inner tub containing clothes, and the like. Such a washing machine includes an outer tub for containing water and an inner tub rotatably disposed in the outer tub to contain clothes. Some types of washing machines may further include a washing blade (e.g. pulsator). As the washing machine operates after loading the clothes into the inner tub, operations such as water supply, washing, rinsing, and dewatering are performed in accordance with a predetermined algorithm.