(right 180, upper left, upper right, upper left, lower right, upper right, lower right, upper right, lower right, upper left, lower right)
According to what you said, there should be surface repair on the third floor after completion. Put the repaired surface behind and repeat this formula. If it is not good, repeat this formula again and you can restore the whole Rubik's Cube.
1970 In March, Larry Nichols invented the "jigsaw puzzle with rotating pieces in groups" and applied for a Canadian patent. It is a 2×2×2 Rubik's Cube, but each Rubik's Cube is attracted by magnets. 1972 obtained the American patent, two years earlier than Professor Rubik's Cube.
Rubik Arne is a professor of architecture and sculpture in Hungary. In order to help students understand the composition and structure of the space cube, he made the first prototype of the Rubik's Cube, inspired by the sand in the Danube.
1974, Professor rubik invented the first Rubik's Cube (then called Rubik's Cube), and obtained the Hungarian patent number HU 170062 in 1975, but did not apply for an international patent. The first Rubik's Cube was sold in a toy store in Budapest in 1977. Unlike Nichols' Rubik's Cube, Professor Rubik's Cube's parts are interlocking like tenons, which are not easily separated by external forces and can be made of any material.
1979 In September, Ideal Toy Company brought the Rubik's Cube to all parts of the world, and made its debut at the international toy exhibitions in London, Paris and the United States in February and October. 1 980.
After the exhibition, Ideal Toy Company renamed the Rubik's Cube as 1980 May, and the first batch of Rubik's Cube was exported to Hungary.
Rubik's cube was widely loved by the public in 1980, and nearly 2 million Rubik's cubes were sold from 1980 to 1982. 198 1 year, a little boy in England, Patrick Bossert, wrote a book called You Can Restore the Rubik's Cube (ISBN 978-0-14-031483-0), with a total volume of * *. It is estimated that in the mid-1980s, one fifth of the people in the world were playing Rubik's Cube.