Why is it that sometimes after the first side of the cube is restored, the first layer is not comple

It's because the foot blocks aren't done well, which is the difference between restoring one layer and restoring one side.

The Rubik's Cube, also known as the Rubik Cube, was first developed in Budapest, Hungary.

School of Architecture El Norn Rubik.

A mechanical educational toy invented by the professor in 1974. The Rubik's Cube has a variety of gameplay methods such as racing, blind twisting, and single twisting, and its popularity has endured, and it is one of the most popular intellectual games with large and small events held every year.

In the usual sense, the Rubik's Cube refers to the third-order Rubik's Cube in the narrow sense.

The third-order Rubik's Cube shape is usually a cube.

Made of resilient hard plastic. The regular racing game is to disrupt the Rubik's Cube and then restore it in the shortest possible time. In a broad sense, the Rubik's Cube refers to all kinds of geometry that can be disrupted and restored by turning.

Rubik's Cube and Huarong Dao.

France's single aristocracy (independent diamond chess) is also known as the three incredible minds in the world of intellectual games.

Start:

Rubik Erno, a Hungarian professor of architecture and sculpture, made the first prototype of the Rubik's Cube, inspired by the Danube, in order to help his students understand the composition and structure of the cube of space.

in the gravel. In 1974, Professor Rubik invented the first Rubik's cube (then known as the Magic Cube) and was granted a Hungarian patent in 1975.

HU170062, but did not apply for an international patent. The first Rubik's Cube was sold in toy stores in Budapest in 1977. Unlike Nichols' Rubik's Cube, Professor Rubik's parts are snapped together like tenons, not easily separated by external forces, and can be made of any material.

In September 1979, Ideal Toys brought the Rubik's Cube to the world, and in 1980 it was unveiled at international toy fairs in London, Paris and the United States.

After the exhibition, Ideal Toys changed the name of the cube to RUBIK'S Cube, in May 1980, the first batch of Rubik's cubes were exported in Hungary.

The feet didn't get right. That's the difference between one layer and one side.

layer 1. <> side.

That's because your approach is wrong.

When playing the Rubik's Cube, the first layer of reduction must meet one requirement: that is, the face is the same color, and the side of the same color is facing down, at this time, the surrounding four faces must be the middle one and the color below it must be the same.

I hope you learn it soon.

4. Set up a cross at the top, and adjust all the four top edges of the Rubik's Cube to the top surface with the same color as the top surface. At this point, there may be 4 situations: when we encounter a "point", it will be a "small turn" after the action, and then "one word", and finally a "cross".

In this way, the top cross of the third-order Rubik's Cube is turned out.

Extended information: 1. The general reduction method of the third-order Rubik's cube: layer first method, most beginners choose the layer first method, which is characterized by few formulas and easy to understand, and the general steps are as follows:

1) For the top layer of the cross, restore the top layer of the edge;

2) Restore the top layer corner block;

3) Restore the middle layer of the edges;

4) For the bottom cross, restore the bottom edge;

5) Flip the bottom corner block to align the bottom color;

6) Adjust the position of the bottom corner block to complete the restoration.

2. Advanced reduction method: CFOP method, which is the method used by most racing players, can restore the six sides of the Rubik's Cube within 30 seconds after proficiency, approximate steps:

1) Cross at the bottom layer;

2) There are 41 cases for completing the first two layers (F2L);

3) Top surface reduction (OLL);

4) Top Surface Reduction (PLL).

To restore one side of the Rubik's Cube, you need to make a cross first, and then there will be three situations, and three different formulas are used according to different needs, as follows:

1. First of all, restore a cross, and 4 edges of the same color form a cross pattern.

2. The reduction corner block will encounter the situation of the missing block in the lower left, formula: d, l, d', l', as shown in the figure below.

4. The situation of the missing block in the lower right corner is opposite, the formula: d', r', d, r, as shown in the figure below.

5. In the case of the same block missing in the lower right corner, the formula: r' d, r, d', r', d, r, as shown in the following figure:

There are four simplest formulas for restoring the top level.

Top cross formula: f r u r u f

Top surface flattening formula: r u2 r u r u r top perimeter adjustment formula: x'(r u'r) d2 (r'u r) d2 r2

Final Restoration Formula: (Triangular Swap) (R u.)' r) u (r u r u') r' u' r2)

The restoration of the first face of the Rubik's Cube is divided into two steps, the first step is to turn the center of the face into a cross, and the second step is to return the top corner of the face to its position. Generally, when restoring the Rubik's Cube, the bottom surface will be restored first, and the remaining part will be restored after the bottom surface is put together. First choose a surface as the bottom surface, determine the center color block of this surface, you will know what color this surface is, and pay attention to the side while determining the bottom surface, and the center color block of the side should also be consistent with the color of the bottom edge of the side.

This step is a bit complicated at the beginning, but it is relatively simple when it comes to actual operation, so there is no specific formula for this step.

When turning the bottom edge, pay attention to the color of the other side of the edge, find the side of the center color block and the side of the edge of the edge of the color of the same color, and then rotate the edge to the same surface as the center color block, so that it will be easier to find the trick. After the cross of the bottom surface is turned, the top corner of the bottom surface is also turned out, that is, the top corner of the top surface is returned to position, and the first layer is restored after this step is completed. After restoration, the bottom surface is restored, and the bottom layer of the side around the bottom surface is also restored.

The color of the bottom layer of the side should be the same as the center color block of the side.

There are two formulas for this step, which are divided into five cases. The formula for the homing of the top corner of the bottom surface is relatively simple, and the first formula is (r u r'), equation two is (f'u'f）。These two formulas can be used separately, in combination, and sometimes repeatedly, depending on the situation.

After the restoration according to the formula, the first side of the Rubik's Cube is restored. Before using the formula, you must observe more, so that you can determine the distribution of the color patch on the bottom surface, and choose the correct formula to quickly restore.

To answer the pro you need 8 steps. 1. First of all, the four edges are screwed well, the edges are the two-color blocks of the third-order Rubik's cube, 2. Turn the bottom cross well, this is aligned and screwed directly up, the difficulty is not great, and the next is the four corner blocks. I'm going to start with the simplest way, and I've summarized that there are about three ways to do it, because you don't know much about it, so I'll start with the simplest.

3. The white one on the lower right can be put in place by turning it up directly, but it will squeeze the edge on the right 4. The position of the other piece is to the back.

5. Then, restore the angle just now, the corner block at the bottom right is straight up, twist it in the opposite transverse direction outward, and it is below it, screw it to the left:

6. In this way, this piece and the lower middle edge are on the left:

7. At this time, it is still the angle just now, screw back the right hand side that you twisted up 8, and then screw back the left side screw.

Taking the third-order Rubik's Cube as an example, the method of restoring the first layer is called a cross.

1. Find the yellow center block first, keep the yellow center block on top, and start to find four white edges in **, if you find a white edge block, it is already in the white position in the above figure. As shown in the first step of the figure below.

2. The bottom edge is returned to position (also known as the bottom cross, the process of correct restoration of the four edges at the bottom layer).

After completing the first step of the small white flower, continue to keep the yellow center block on it, take the Rubik's Cube, see what color the right center block of the Rubik's Cube is, turn the yellow top layer, so that the side color of the white edge block is the same as the color of the right center block, as shown in the picture above, then turn the right hand twice, the white edge will return to its final position correctly.

Continue to keep the yellow side up, turn the whole Rubik's cube to the left once, that is, the white edge that has just been completed is placed in the front position, then look at the color of the center block on the right, repeat the above steps, and finally the four white edges return to the correct position one by one. At this point, the second step of the restoration of the four white edges is completed.

3. The bottom corner is returned to the position (the four corners of the first layer of the Rubik's Cube are restored).

There are a total of eight corner blocks in the Rubik's Cube, first from the position of the top corner block to find the corner block with white color; Find a corner block with white and pronounce the other two colors of the corner block, for example, if you find a white, blue, and red corner block, you need to place the corner block between the blue center block and the red center block.

When the white of the corner is facing up, observe whether the corner is close to the left hand or the right hand, close to the left hand and use the left-hand formula three times, and close to the right hand with the right-hand formula three times. As shown in the figure below, do the left-handed formula three times, and the left-handed formula is as follows:

As shown in the figure below, do the right-handed formula three times in a row.

For the third-order Rubik's Cube, it is necessary to discard the interference of the "face" and assemble the third-order Rubik's Cube from the "layer".

The first method of three layers, first restore the bottom cross, this step is relatively simple, the four edges of the first layer and the central block around the selection are restored, and the color should be right. On this basis, the four corner blocks of the first layer are completed. There is no formula for the first layer, so let's figure it out for yourself.

After completing the first layer, restore the second layer, which is generally this formula, r'u'r'u'r'urur moves the top edge on the right to the second layer, (ruur'u)x2 f'u'fConvert the color of the second layer of edges on the right-hand sideAfter completing the second layer, restore the top cross frur'u'f'

After that, complete the top corner block r'u'ru'r'uur

After the top surface is restored, use the PLL formula (many kinds, choose by yourself) to restore the last layer of four corner formulas: R2, D2, R',u',r,d2,r',u,r'

The three edges on the left front and right are changed clockwise: r2urur'u'r'u'r'ur'

The three edges on the left front and right are changed counterclockwise: ru'rururu'r'u'R2 Come on, the Rubik's Cube is not difficult, just understand. It is recommended that you go to the Rubik's Cube to have a look, there are many detailed solutions, and there are many masters.

You can go to the Rubik's Cube.

Little station, I'm there too.

I learn it very quickly.

It's really nice and advanced.

The gameplay is understood after the package you reach speed.

Within 40 seconds. It's pretty simple.