The color order of the six faces of the third-level Rubik's Cube needs to be memorized. The position of the center block remains unchanged and the edge blocks, foot blocks, and center blocks should be distinguished.
The meaning of the letters of the third-order Rubik's Cube formula needs to be memorized, which is the letter corresponding to each forwarding.
Thus, the first formula is: (RU')(RURU)(RU'R'U'R2).
The second formula is: (R2URU)(R'U'R'U')(R'UR').
The third formula is: r2R'2Ur2R'2U2r2R'2Ur2R'2.
The fourth formula is: U(R'U'RU')(RURU')(R;URU)(R2U'R'U).
The fifth formula is: X'R2D2(R'U'R)D2(R'UR').
The sixth formula is: X'(RU'R)D2(R'UR)D2R'2.
Historical History
In March 1970, Larry Nichols invented the "Puzzle with Pieces Rotatable in Groups" and applied for a Canadian patent. It was a 2×2×2 Rubik's Cube, but Each block is held together by magnets. It received a U.S. patent in 1972, two years before Professor Erno Rubik's Rubik's Cube.
Erno Rubik is a Hungarian professor of architecture and sculpture. In order to help students understand the composition and structure of the space cube, he made the first prototype of the Rubik's Cube by himself. , which was inspired by the sand and gravel in the Danube River.