Level 3 cube entry solution-layer first Method

 

Because the image of Sina is anti-leech

See http://blog.sina.com.cn/s/blog_40cb41af0100cyj9.html

 

Basic knowledge:

First, we need to clearly understand the concepts of "layer" and "surface. We say that after the "One Side" is screwed, the nine stickers on one surface are one color. "One Layer" refers to the 12 pasters adjacent to each other on the "One Side". Each 3 pasters are the same.

Top is up,Front is front,Left on the left,Right on the right,Back,Below is down.

Rotate the top surface 90 ° clockwise-> U,Rotate the top surface 90 °-> U' counterclockwise ',Rotate the top surface 180 °-> u2

Other rotation methods and so on.

 ☆: Pay special attention to you.ZhengShun time and reverse time after that surface ☆

Steps of the layer-first method:

 

The layer-first method, as its name implies, is a layer-by-layer solution to the cube.

Level 1

Okay, let's start to twist the first layer. In two steps: 1. Cross frame, 2. Four corner blocks.

1. Cross of Bottom Frame.First, consider which side is the first layer. How do I know which layer is there when the cube is in disorder? You only need to select the right center block. For example, if you select white as the first layer, you can find the white center block, then try to twist the other edges with white pasters to the white center block. This step is relatively simple and there is no formula.

After the mounting, it should look like this:

2. returns the bottom corner.One by one. There may be two basic situations for each corner block:

Apply the Formula 1-1: f d F' to the first one'

Apply the Formula 1-2: r'd' R to the second type.

In other cases, for example, the angle block is already in the first layer, but the position or color direction is incorrect; or the angle block is in the bottom layer, but the white block is downward, both can be adjusted to the above two situations by rotating the bottom layer or applying two formulas.

After the first layer is complete, the entire cube is flipped up and down, which should look like this:

 

Layer 2

Middle level rib location:In fact, only four corner blocks are left on the second layer. There are two basic situations for each unfinished corner block:

For the first type, use the formula 2-1: r'u'r'u'r'u r u r (five Inverse Four Directions)

For the second type, use the formula 2-2: r u r 'r'u'r' (five X-4 inversion)

In other cases, for example, if the block to be restored is already in the correct position, but the direction is not correct, you can apply the formula 2-1,

Replace it with an unrelated block and use one of the two formulas to restore it.

 

Layer 3

The third layer is complex and needs to be completed in four steps: cross frame, one color on the top layer, corner block alignment, and rib block alignment.

1. Cross of top frame.

At this step, the following two layers are ready, so we don't need to worry about it. We only need to look at the color of the third layer's rib block:

You only need to check which situation, and apply the formula 3: f r u r 'u'f' repeatedly to set the cross.

(Cube view)

 

2. One color on the top

After the cross, there are two basic situations:

(Cube view)

In the first case, apply the formula 4-1: l 'u2 l u l 'U L

In the second case, apply the formula 4-2: R U2 r'u'r u'r'

For other cases, as long as the followingApply formula 4 to the orientation, It can be changed to one of the above two types:

3. Align corner blocks

At this time, we need to check whether the sticker of the two sides of the 3rd layer is a color?If yes, use the side as the Front (that is, the front of the face), and then check whether the side sticker of the corner block at the bottom of the third layer is a color? If the same, it indicates that the corner block is aligned. skip this step and go to "4. alignment "part. If not, apply formula 5: R B 'R F2 r' B R F2 R2, and then rotate the upper layer, it is found that all the four upper corner blocks are aligned.

4. Alignment

There are two basic statuses:

In the first case, apply the formula 6-1: F2 u l r 'f2 l' r u F2

In the second case, apply the formula 6-2: F2 U 'l R' F2 l 'r U' F2 (the difference between the two formulas is only the uplink/inverse)

In other cases, you only need to apply formula 6 twice.

At this point, the Cube's six aspects have been restored.