Fourth order Rubik s Cube merges the central block

The most critical first step in the restoration of the 4th order Rubik's Cube is to restore the center block, followed by merging the edges, after merging all the heart blocks and edges, you can restore the 4th order Rubik's Cube according to the third-order Rubik's Cube gameplay formula (that is, the so-called reduction method restoration). The gameplay of the fourth-order Rubik's cube should be done in the following way: restore the fourth-order Rubik's Cube, using 5 formulas, which is enough to restore the fourth-order solid color Rubik's Cube.

Merge the heart block formula 1: mr u mr merge the center block, the above formula is just a way, according to the above formula, it can also be done in reverse, such as the formula: ml' u'ml, when I was a beginner, I carefully comprehended the skills and rules of the formula, understood the meaning of the formula, and I could restore it as I wanted without the formula.

Merge edge block equation two: md r f' u r' f md'After merging all the heart blocks and edge blocks, you can restore the fourth-order Rubik's Cube according to the third-order Rubik's Cube gameplay formula (the so-called reduced-order method restoration). Due to the characteristics of the fourth order, some special cases often arise in the end, which can be solved by the following two formulas.

Swap two opposite edges for formula three: mr2 u2 mr2 u2 mu2 mr2 mu2 straighten one of the edges for formula four: mr2 b2 u2 ml u2 mr' u2 mr u2 f2 mr f2 ml'B2 MR2 Reduced Order Method:

That is, the fourth order is turned into the third order to complete, the first form, a center like the third order, there are four small color blocks here, the second step is to adjust the edges to the same color, and the third step is to complete the six sides according to the third order. Step 1: Form a center here to position the international standard color, red in the front, purple (or orange) in the back, yellow on the top, white on the bottom, blue on the left, green on the right, and the completion step is to complete the center of the opposite surface first!

For example, the red is completed first, and the next step is to complete the purple (or orange) opposite to the back.

Then use the third-order method to restore! (However, because the fourth-order has no color center, the PLL is a little different from the third-order, and there are two more cases, so the third-order foundation + two fourth-order formulas can restore all the cases of the fourth-order) Let me briefly talk about the steps, please see here for details.

1.Restore color centers. It's about putting the four small pieces in the middle together.

There is no formula for this, you have to play the rules by yourself, it's very simple, but pay attention to the color and don't spell it wrong! Very important! If you misspell it, you won't be able to restore it!

To match colors according to international standards: yellow on the top, white on the bottom, red on the front, orange on the back, blue on the left, green on the right) 2Restore edges.

There are formulas here, just memorize one or two. (If this step is completed, it will become a third-order Rubik's cube, and then you will play according to the third-order.) If there are special circumstances, use the formula from step 3) 3Special circumstances.

Use r u r' to replace the center block in the upper left corner of the top layer with the center fast in the lower right corner of the front, without affecting the satisfaction of other center speeds.

After the corner blocks and edges are restored, the Rubik's Cube no longer pays attention to the up, down, left, right, front and back directions during restoration, and the orientation of the Rubik's Cube depends on the situation of the center block that needs to be rotated. Top surface center block 180°:(r l u2 r' l' u)2 。

The front center block is 90° clockwise, and the right center block is 90° counterclockwise: m d m' e' m d' m'e, the front center block is 90° clockwise, and the rear center block is 90° counterclockwise: m d m' e2 m d' m'e2, if both central blocks are 90° clockwise (or counterclockwise), one must be reversed, and then one of them should be rotated 180°.

Top surface center block 180°:(r l u2 r' l' u)2 。

The front center block is 90° clockwise, and the right center block is 90° counterclockwise: m d m' e' m d' m' e

The front center block is 90° clockwise, and the rear center block is 90° counterclockwise: m d m' e2 m d' m' e2

If both center blocks are 90° clockwise (or counterclockwise), one must be one forward and one reversed, and then 180° to one of them.

The blue center block faces right and then reverts with the formula below.

The first is the instructions.

Up, down, left, right, front, back, refers to the corresponding side clockwise 90 degrees, reverse is 90 degrees counterclockwise, 2 is 180 degrees, special twisting method: is the corresponding side of the middle 90 degrees, for example, the upper is the middle of the above to the direction of the arrow.

After turning, it will become the following pattern.

Formula: on, on, on, on

Green in front, orange in top, so that the middle is left up and right down.

The principle is to turn it around at will in the middle If there is alignment, it means that the first step is right, and then change the direction to find one that can be aligned, and then it is clear at a glance.

White on the top of the yellow before the front orange left blue right green, this must be right, just follow this pretend, I have pretended it myself.

1. Arrange the center block. Align one central block first (choose yellow for the little five), and stack the four pieces together without a problem. The difficulty is how to arrange the other faces without destroying the completed center block. Convert to as shown in the figure: b+ 5- b+

2. Encounter two interchanges of the same color: b+ 5++ b- or b- 4++ b+

3. Twelve groups of intermediate colors. Find two edges of the same color (red and purple, as shown in the image). Two are on the same top: a+ 4+ a- 8+ 4++ b- 4+ a- 4- b+

4. Two are as follows: a+ 4+ a- 8+ 4++ c- 4+ a- 4- c+

<>6. Upper left and lower right: b- 4+ a- 4- b+

7. In the last two groups, there are 50% possible completion of the side edges, and 50% can not be solved with the formula just now, only use the following formula: as shown in the figure, it should be carried out first: 1+ a+ 8+ becomes the second figure below, or it is possible to go directly to the second graph without this formula.

The first formula: up-down + front + back - right + left - up - right - left + front - back + up + down - left + This is to call the center square left-handed by 90 degrees, it should be noted that when using this formula, the consequence is that the center square on the left hand side will be rotated to the right by 90 degrees.

The second formula: left-down + up-back-front + left-right + up + left + right back + front - down - up + The first formula is the inverse formula of this formula, so that the center square is rotated to the right by 90 degrees, and the result is that the left-handed side of the left-hand side will also be taken by 90 degrees.

The third formula: up + right + left + up 2 right - left - up + right + left + upper dan virtual 2 right - left - will not affect the other sides when using this formula will rotate the center square 180 degrees.

The fourth-order Rubik's Cube center block reduction formula has rw u rw'、rw u' rw'、lw' u lw、lw' u'lw, first put together the yellow and white two-sided center block, and then complete the blue, red, green, orange four-sided center block, first complete the yellow center block, keep the yellow center block unbroken, and then complete the white center block.

The fourth-order Rubik's Cube flipping formula has the in-situ flipping formula r u r' f r' f'r, the ridge formula uw' （r u r' f r' f'r) uw, the formula for the change of the edge ( formula of p) uw2 ( mr2 u2 )2 mr2 uw2, the formula of single edge flip rw u2 cr (rw u2)2 rw' u2、lw u2 rw' u2 rw u2 rw' u2、rw'。

The formula used in the fourth-order Rubik's Cube is rw u rw'、rw u' rw'、lw' u lw、lw' u' lw、rw u'2 rw'、lw' u2 lw、r u r' f r' f' r、uw' （r u r' f r' f' r） uw、r u r' f r' f' r 。

The special formulas are UW2 ( MR2 U2 )2 MR2 UW2, RW U2 CR (RW U2)2 RW' u2、lw u2 rw' u2 rw u2 rw' u2 rw'。

where the formula letter left = l (left), right = r (right) expression: f (90 degrees clockwise), r'(right 90 degrees counterclockwise), U2 (upper clockwise 180 degrees).

Merge Prism Formula: MDRF'ur'fmd

Due to the fourth-order Rubik's Cube.

There is no fixed center block, so before proceeding with this step, it is important to remember the color position of the 6-sided limb split, and the following is a list of 8 situations that occur in the process of putting together the center block.

After assembling the center block of the six grandsons of the Rubik's Cube, the next step is to combine the 24 edges into 12 edges according to the same color of the edges, which is the same as the third-order Rubik's Cube.

The state is the same. After that, the last two edges of the situation and the processing formula are implemented.

Fourth-order Rubik (English: rubik'srevenge), a cube of 4 4 4.

The Rubik's Cube of Structure, invented by Péter Sebest Ény in 1981. The original name of the fourth-order Rubik's cube was originally modeled after the third-order Rubik's cube (Rubik.

block) and named it "Sepostani Block".

Essential material: Nucleus Rubik's Cube. 1. Merge the four squares of the six-sided imitation center.

2. Merge the rotation formula MDRF of the edged block'ur'fmd'

3. Use the third-order transfer method to complete most of the work.

4. Deal with special circumstances.

Swap two opposing edges: mr2 u2 mr2 u2 mu2 mr2 mu2 swap the two edges.

The front is vertical, the right is upper, and the top is up.

Top layer (front horizontal upper layer) Right right.

The front is vertical, the right is upper, and the top is up.

Top and upper middle (front, horizontal, middle, upper) right, right.

The front is vertical, the right is upper, and the top is up.

The front is horizontal, middle, upper, right, right.

Then spell according to the formula you know, and you're good to go.

Swap two opposing edges: mr2 u2 mr2 u2 mu2 mr2 mu2 swap the two edges.

Fourth-order Rubik's Cube. Introduction: Cube structure for 4 4 4. Inventored by Peter Sepostani, the fourth-order Rubik's Cube was originally called the Sebesteny Rubik's Cube, which was later finalized as "Rubik" before it was produced's revenge" to attract Rubik's Cube lovers, as the name means revenge in English.

Variations: The fourth-order Rubik's Cube has a total of 8 corner blocks, 24 side blocks, and 24 center blocks. The changing state of the corner blocks is the same as that of the second-order Rubik's Cube, so there are a total of changing states. The four central blocks of each color can be positioned independently, so there is a total of variation.

Terminology: u: upper layer; mu: the second layer on the upper count; d: lower layer; MD: the second layer of the lower number; l: left layer; ml: second layer from left; r: the right layer.

mu: the second layer on the upper count;

d: lower layer; MD: the second layer of the lower number;

l: left layer;

ml: second layer from left;

r: the right layer.

mr: second layer from right.

f: Front layer. MF: the second layer in the first number.

B: Rear layer. MB: the second layer after that.

mr2 u2 mr2 tu2 mr2 mu2 (The pendulum is that two opposite colors are next to each other, one facing the opposite and the other facing the right.) The two colors are opposite, one facing each other and the other facing each other).

The front is vertical, the right is upper, and the top is up.

Top layer (front horizontal upper layer) Right right.

The front is vertical, the right is upper, and the top is up.

Top and upper middle (front, horizontal, middle, upper) right, right.

The front is vertical, the right is upper, and the top is up.

The front is horizontal, middle, upper, right, right.

The relative position of the center block of the fourth-order Rubik's Cube is not fixed. Therefore, the relative position of the center block needs to be determined first according to the corner block. Generally speaking, the relative position of the center block of the fourth-order Rubik's cube under the "standard color" is:

At this point, the fourth-order Rubik's Cube restoration center block stage is completed

Fourth-order Rubik (English: rubik'S Revenge), a cube-shaped Rubik's Cube of 4 4, was invented by Péter Sebestény in 1981. The original name of the fourth-order Rubik's cube was originally named "Sepos Chain Ketani Cube" after the third-order Rubik's cube (Rubic cube), and later it was finally named "The Revenge of the Magic Shed" before production to attract fans of the third-order Rubik's Cube.