The second-order Rubik's cube has only eight corner blocks, which can be restored by using part of the principle of "hierarchical priority method of third-order Rubik's cube"
Stage 1: Restore the top floor.
The second stage: turn over the bottom corner block and align the background color.
The third stage: adjust the position of the bottom corner block and restore it.
Pocket Cube (English: Pocket Cube), also known as pocket cube, mini cube, small cube and ice cube, has a cube structure of 2×2×2. The earliest second-order Rubik's cube patent was applied by Professor rubik Arne on March 29th, 1983. The U.S. patent number is 4378 1 17, which we used to call R structure.
The second-order Rubik's cube itself has only eight corner blocks, and there are no other blocks. The structure is similar to the third-order Rubik's cube, which can be restored by the formula of restoring the third-order Rubik's cube.