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.

The second layer formula: Shangshun-Right Shun-Shanginverse-Right Inverse-Shanginverse-Forward Inverse-Shangshun-Forward Shun.

The third layer formula (cross): right inverse-upper inverse-front inverse-upper shun-front shun-right shun.

The third layer formula (four-corner block): right cis-upper cis-right inverse-upper cis-upper cis 180- right cis-right inverse.

Extended data:

Singmaster notation is a recording method of Rubik's cube rotation, which was invented by David Singmaster, a former professor of mathematics at South Bank University in London, in1978+February. Singmaster notation has become a universal standard, commonly known as "Rubik's cube formula symbol".

Singmaster tag consists of "code number of each layer" and "rotation direction".

Code of each layer: Each layer of the Rubik's Cube is referred to by the English initials. R (right), L (left), U (upper), D (lower), F (front) and B (rear) refer to right, left, top (upper), bottom (lower), front (front) and rear (rear) layers respectively.

Rotation direction: rotate 90 clockwise to directly write the codes of each layer; Rotate 90 counterclockwise, and each layer codes suffix' or I'; Rotation 180, with each layer coded with suffix 2 or 2 (default clockwise rotation 180).

Baidu encyclopedia-third-order Rubik's cube

Baidu encyclopedia-magic cube