Bottom recovery:
First restore a color at the bottom to a face, and generally choose white. This can be achieved by the following formula:
1. Three meals a day.
2. One day and one night.
Intermediate restore:
Next, restore the four colors of the middle layer. The common method is to put the color to be restored in front of the right hand, and then rotate it according to the position of the color until the middle layer is completely restored.
Top level restore:
Finally, top-level restore. There are many ways to accomplish a top-level restore, one of which is the crossover method:
1. First, match the color of the top center block with the color of the bottom center block and put it in front of the right hand.
2. Then according to the need to restore the color position, use the following formula to complete:
( 1)U R Ui Ri Ui Fi uff .
(2) Your life will be better.
The origin of Rubik's cube:
Rubik's cube, also known as Rubik's cube, is a three-dimensional puzzle composed of 26 small cubes. Its origin can be traced back to the 1970s.
Rubik's Cube was first created by Hungarian architecture professor Ruben enel (Ern? Rubik's cube) 1974, Ruben Ernell, who was teaching at Budapest University of Technology at that time, designed a cube puzzle to help students understand the concept of three-dimensional geometry.
The original Rubik's Cube was made of wood and rubber, and the side length of each small cube was 2.2 cm. Ruben Ernell designed a mechanism that allows the cube to rotate freely, but when the small cube rotates, the shape of the whole cube will not change.
Ruben Ernell applied for the patent of Rubik's Cube on 1974, and it was sold in Hungary on 1977. At first, the Rubik's Cube did not get widespread attention and recognition. However, in 1979, an English toy businessman named Tom Kramer bought some Rubik's cubes while traveling in Hungary and brought them back to England.
Rubik's cube quickly became popular in Britain, which aroused widespread interest and enthusiasm. From 65438 to 0980, the Rubik's Cube wave broke out all over the world, and thousands of people were fascinated by solving this seemingly simple but challenging problem.
The success of Rubik's Cube lies in its unique structure and rotation mechanism, and its ability to produce almost infinite combinations. It is not only an entertainment toy, but also an intellectual challenge, which makes people exercise their thinking ability, patience and creativity in the process of solving puzzles.
Up to now, the Rubik's Cube has become one of the most popular educational toys in the world, holding numerous competitions and competitive activities, attracting many Rubik's Cube lovers. The design and invention of Rubik's Cube is not only a great achievement, but also a form of entertainment that transcends national boundaries and cultures.