1, for the top span, restore the top edge block.

2. Restore the vertex block.

3. Restore the middle edge block.

4. For the bottom cross, restore the bottom edge block.

5. Turn the bottom corner block and align the bottom color.

6. Adjust the position of the bottom corner block to complete the reduction.

Extended data:

Rubik's cube nine-grid 24-step reduction method is Singmaster notation and a recording method of Rubik's cube rotation. It was invented by David Simmaster, a former professor of mathematics at South Bank University in London, in February 1978. Singmaster notation has become a universal standard, commonly known as "Rubik's cube formula symbol".

Cross: It means to make a cross at the bottom.

F2l: (the first two layers) means to align the first two layers at the same time.

OLL: (the direction of the last layer) means to unify the colors, with the top facing up.

PLL: (the arrangement of the last layer) is to adjust the top order (to complete the whole Rubik's cube).

Baidu encyclopedia-third-order Rubik's cube