There are many ways to restore the third-order Rubik's cube, among which the "layer first method" is the most suitable method for beginners to master. A third-order Rubik's cube can be understood as "top", "middle" and "bottom" from top to bottom. The so-called "layer first method" is to restore layer by layer.
1. First, select a face to build a cross, and then align the colors of the central blocks of the four sides with the colors adjacent to the cross.
2. Place the bottom layer in the way of top, left, bottom and right. If the position is correct, the side layer has been put together.
3. Then align the center block with the assembled layer and assemble the middle layer of the edge according to the formula.
4. put the cross on the top floor, but be careful not to mess up the parts that have been spelled in front, and then spell the top surface according to the formula.
5. Align the color in the middle of the third layer on the side with the color of the center block, and put the third layer Rubik's cube together according to the formula to complete the reduction.
Development history:
1 and1in March, 970, Larry Nichols invented the puzzle? Chess pieces can rotate in groups ",and applied for a Canadian patent. It is a 2×2×2 Rubik's cube, but each square is attracted by magnets. 1972 obtained the American patent, two years earlier than Professor Rubik's Cube.
2.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 gravel in the Danube.
3. 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.
4. 1979 In September, Ideal Toy Company brought the Rubik's Cube to all parts of the world, and made its debut at international toy fairs in London, Paris and the United States in February and January, 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.