Illustration of the third layer formula of the third-order Rubik's cube

The formula of the third layer of the third-order Rubik's Cube is illustrated as follows:

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

three situations use the same formula: RUFUFR

Second, the classic cross turning method

In this step, the ordinary cross should be turned into a classic cross, and 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 points and four points. The color block in the upper left corner is for positioning. Have you found 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 cases.

formula: rauru2r

diagram of the formula of the third-order Rubik's cube. Layer 2

Make a cross on the top. Note that the right cross must be as shown in the figure, and the edge and center of each side are the same color. Here are two simple examples to illustrate how to make a cross.

align the four corners. There are many ways to reduce the angle, and only one of them is introduced below. There are five cases of reducing corner blocks, four of which are symmetrical to each other, so let's talk about three cases, and the symmetry can be publicized symmetrically.

restore the edges of the second layer. From the previous step to this step, we can see that what we have to deal with in this step is the four edges of the middle layer: red, yellow, orange, orange and white, red and white. When we finish the top surface, we should turn the Rubik's Cube upside down, with the blue surface facing down and the green surface facing up, and then look at which of the above four edges are located on the top surface (the surface centered on the green surface), and choose one at random, so we will start with it (taking the red and white blocks on the top surface as an example).

cross the top surface. There are only four possible situations when the four prism blocks on the top floor are rotating. We use a formula to make the first three situations cross, and the specific operation is shown in the figure. It turns I into II, II into III, and finally III into IV, and the cross is done.

turn over the colors of the four corners of the Rubik's cube to make it form the following state. Let's restore the positions of the four corners at www.fun48.com

, and make them form the following state. Changing positions is relatively simple. The first one is to transpose the upper left, lower left and upper right reversely, and the other one is clockwise. Just reverse the above formula. There is also a diagonal swap, which can be restored by superimposing the above formula twice at most.

there are four kinds of reduction edges. the first one is to reverse the time change from top to back, top to left and top to right, and the second one is to reverse the above operation. One of the edges can be restored according to either of these two situations (forward or backward), and then the whole Rubik's cube can be restored by using the formula again as appropriate.

spell the top surface

in this step, we have to spell the top surface. There are only two situations, commonly known as small fish, which are very simple. Careful friends will find that the two situations are very similar, and the rotation method is also very close, that is, left-handed rotation and right-handed rotation.

note: in both cases, don't destroy the small fish when twisting.

formula 1: ru ru u2r

formula 2: Lu Lu u2l

adjust the color block of the third layer

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

If we can't find a color block group, we will make one side according to the following formula, and we will group the color blocks when we are done.

formula: L FL B2 LF L B2 L2

spell the six sides

there is no need to learn a new formula in this step. Do you remember the formula of the classic cross? Same as the third and third steps.

put the assembled front face forward to observe clockwise and counterclockwise.

clockwise

first, make a classic cross turn with your left hand: L U LU L U2 L

then make a classic cross turn with your right hand: ru ruruu2r

counterclockwise

first, make a classic cross turn with your right hand: ru ruruu2r.