How to restore the solution of the top layer of the third-order Rubik's cube

1, cross at the top and put a cross at the top. First, observe the pattern of the top color block and compare it with the bottom. If it is almost the same, do it according to the corresponding formula.

Three cases use the same formula: R'U'F'UFR.

2. In this step, we should turn the ordinary cross into a classic cross. The following five situations are divided into two points and four points. Pay attention to the upper left corner of the picture. You will find the difference between two and four. The color block in the upper left corner is used for positioning. Did you find it?

At 2 o'clock, the color blocks in the upper left corner are all facing backward, and at 4 o'clock, they are all facing left. The same formula can also be used in five situations.

3. In this step, there are only two situations (commonly known as small fish) that are very simple. Careful friends will find that these two situations are very similar and the rotation methods are very close, that is, left-handed rotation and right-handed rotation.

Note: in both cases, don't destroy the small bend (small fish) when screwing. ?

Formula1:r 'u 'r 'u 'r 'u '2r?

Equation 2:l u l' u l 2 l'

4. We need to adjust the color block of the third layer and find a color block group with the same color on both sides and other colors in the middle in Figure 2.

If you can't find the color block group, do it according to the following formula, put the color block group behind when you are finished, and do it again according to the formula just now, and the effect of "Figure 3" will appear.

You don't need to learn new formulas in this step. Do you remember the formula of the classic cross? Same as the third step. Turn the assembled front face forward and observe it clockwise and counterclockwise. ?

clockwise

First, do a classic cross turn with your left hand: l u l' u u l l 2 l'

Do another classic cross twist with your right hand: r' u' r u' r' u' r' r' 2r?

Counterclockwise

First, do a classic cross twist with your right hand: R' U' R U' R' U' R' 2 R.

Do another classic cross turn with your left hand: l u l' u u l l 2 l'