The formula of 4×4 Rubik's Cube is upper right and lower right. The formula of 4×4 Rubik's Cube includes upper right, lower right, anti-left, upper left, lower left, Zuo Zuo, lower Zuo Zuo, upper left, upper left, lower right and lower right, which is the rotation order of the fourth-order Rubik's Cube. The fourth-order cube can be restored according to the third-order cube. Under special circumstances, the formula of edge exchange is Uw2(MR2U2)2MR2Uw2.

The origin of Rubik's cube

The Rubik's Cube, also called Rubik's Cube, was originally a mechanical educational toy invented by Professor Ern Rubik of Budapest Institute of Architecture in 1974. Back in the spring of 1974, at Budapest Technical School, Mr. Ern Rubik, the inventor of the Rubik's Cube, was taking a class called 3D model.

The content of this course is to let students build a three-dimensional square with some cardboard, and then cut it into eight equal squares. In order to facilitate observation, they painted each face with different colors. It was at this time that he found that if he turned over a layer of small squares at will, its arrangement order would be disrupted and the big Rubik's Cube would be different.