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Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step ill

Rubiks Cube, also known as the Magic Cube, was invented by Professor Erno Rubik of the Budapest School of Architecture in Hungary in 1974. The third-level Rubiks Cube is made of elastic hard plastic with 6 sides and a total of 26 small cubes. The Rubiks Cube, the "Huarong Dao" invented by the Chinese, and the "Independent Diamond" invented by the French are known as the three incredible things in the intellectual game world.

There are many ways to complete the Rubiks Cube. The secret of many Rubiks Cube masters completing the Rubiks Cube in just a few seconds is because they are fully familiar with the hundreds of Rubiks Cube formulas that should be used in hundreds of color distributions. What kind. However, many newcomers don’t like to memorize formulas and are not used to memorizing the distribution of many colors. Therefore, I recommend the easiest method to remember when learning a Rubik’s Cube for beginners. I hope it can help you. Once you become familiar with this method, you can learn more advanced methods and learn more color distributions.

Because this method involves a lot of loops and wastes a lot of time, my current record using this method is 2 minutes. But I believe that you will be able to solve it within 2 minutes in the future! If you want to master the Rubiks Cube, you need patience (after reading this long article) and study( Completing the Rubiks Cube for the first time is a process that requires hard study) and hundreds of practices. Because 90% of the steps need to be memorized in the brain, and then the feel obtained through repeated practice becomes a habit. This stage requires hard work, but the sense of accomplishment brought by completing the Rubiks Cube in the shortest time is unparalleled!

The next step is a tutorial. Words are much more important than pictures. Be sure to read the words carefully. Pictures are just auxiliary.

What you need to know about the Rubik’s Cube:

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

No matter how it is rotated, the middle block of each face [Figure: 1-The center block of the face] is fixed. So the color of the center block of each side determines the color of that side.

No matter how you turn it, the block with three colors located at the top corner [Picture: 2-Corner block] will always be at a certain vertex corner; the block with two colors located in the middle of the edge [Picture: 2-Middle of the edge]block] will always be in the middle of a certain edge.

The so-called formula is to use a certain routine to tell you how to turn each side. The letters U D L R F B used represent the upper, lower, left, right, front and back sides of the Rubiks Cube respectively. As shown in the picture above (the rear side (B) is generally not used, so it is not shown). Adding an apostrophe (') after a letter means rotating the surface counterclockwise. If there is no apostrophe, it means turning it clockwise. For example, R’ means the right side rotates counterclockwise.

The first step: the first cross

Here we take white noodles as an example. If you want to turn out a face, you must first turn out a cross shape. But the cross is not just any white block. When turning out the cross, it must be ensured that the color of the upper edge middle block is the same as that of the surface. This step requires a little exploration on your own. As shown below:

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

P.S. The first step is indeed very important, but many students still don’t understand it. I also tried to write out the first step in detail a few days ago, but there were so many distributions that I felt dizzy while writing. And once you get started, the first step will be very simple. So please forgive my laziness. I won’t explain this step in detail. Please feel free to explore based on the picture and text below:

1. First locate the center block of the edge you want to restore. For example, the side facing you is blue and the top layer is white, so you have to first find where the [white-blue] block has gone, and then restore it to its original state. position, which is position 1 marked with yellow shading in the picture below.

2. Next, let’s say you want to restore the [White-Red] block. From the surface center block, we can know that the completed red surface will be on the right side of the blue surface and at position 2 below the white surface. (Okay, I really can’t help but complain here. It seems that the red and blue were reversed when I was making the picture. Let’s just make up for it. ( ̄▽ ̄")) So When you find the lost [White-Red] block, don't care about the color of the center block on the second layer. Just make sure to turn it to position No. 2 in the picture below, and then turn it On the top layer, you will find that blue and blue, red and red will all be aligned...

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

(↑↑↑↑↑ means that this explanation is really vague...but this step is really...after you figure this step out, you will know why I can't write a detailed diagram... ....In addition, it is strongly recommended to practice this step repeatedly at the beginning. Repeated practice will help you deepen your understanding of the Rubiks Cube.)

The second step is to return the top corner of the first surface and complete the first layer

This step will bring the scattered white corner pieces back into place.

First, confirm the position of the white corner block that has the same color as the three adjacent sides. As shown in the picture below, the color of the corner block closest to you should be [White-Blue-Red], so you need to find the actual position of [White-Blue-Red]. And move it to the top corner.

When the actual position of the white area of ??[White-Blue-Red] is located in the circle of the bottom layer (not the bottom surface), first rotate the bottom layer horizontally so that[White-Blue- Red]The white part of the top corner block is located at the lower top corner of its destination (as shown in the picture), and then rotate as shown in the picture to make the bottom corner block interchange with the upper top corner block in the same column , thus completing a top corner.

If the white area of ??[White-Blue-Red] is located in the top circle: use any of the methods in the picture below to swap any corner block on the bottom layer with the corner block , you can get the two situations in the figure below.

If the white area of ??[White-Blue-Red] is on the bottom: Use any of the methods in the picture below to place the block with a top corner of a non-matching color (non[White-Blue-Red]) are interchanged to get the two situations in the picture below.

For newcomers: It is recommended to practice turning out one surface at the beginning, regardless of whether the colors of the two upper layers are aligned. It not only cultivates the hand feeling but also cultivates the eye for observing the Rubiks Cube.

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

The third step is to complete the second layer

After completing the second step, the white top layer of the Rubiks Cube and the upper circle should all be in place. Turn the Rubiks Cube over so the white side is facing down. White at this time

The opposite side of

(which should be yellow) is the upper layer. The following formulas and rotations will be based on yellow as the top (U) and white as the bottom (D). (pictured below)

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

This step will restore the second layer (the second layer is actually only missing the middle block of edges). First of all, you need to confirm the position of the middle block of the edge that is the same color as the adjacent two sides. As shown in the picture below, the middle block of the edge closest to you should be the [red-blue] block.

When the red area of ??[Red-Blue] is located on the top circle, rotate the top layer horizontally, and the following two situations will occur. The first situation is that the red area of ??[Red-Blue] can be adjacent to the center block of the red face directly in front (F), while the blue area of ??[Red-Blue] The color area should belong to the right side (R). The second case is that the blue area of ??[Red-Blue] can be adjacent to the center block of the blue face on the right side (R), and [Red-Blue]The red area should belong to the front (F). Rotate as shown in the figure to return the middle block of the edge to its original position.

When the [Red-Blue] happens to be in its correct position but the colors are reversed, use one of the methods below to move the [Red-Blue] block go out. After moving it to the upper circle, follow the method in the picture below.

Using this method, all the edge middle blocks of the second layer can be returned to their original positions, and the third step is completed.

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

Step 4 Top Cross

After completing the third step, your Rubiks Cube should appear in one of the three situations shown in the picture below. (Note: In addition to the yellow blocks marked in the picture, the top layer (U) may have other yellow blocks, regardless of them. As long as the yellow areas marked in the picture are yellow blocks. It does not matter what the colors of the next two layers are. , red and blue are used as examples in the figure). Rotate the top layer (U) so that the top layer is the same asone of the three situations in the picture below, and then rotate according to the steps shown in the picture. If no cross appears after performing this step once, repeat this step (i.e. rotate the top layer so that it becomes one of the following three, and then rotate according to the steps shown in the picture) once or twice, and you will get Top cross.

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

The fifth step is to return the middle block of the top edge to its position

The purpose of this step is to return all the 4 edged middle blocks of the top layer into place.

Rotate the top layer (U), if you can return one of the middle edge blocks to its original position (as shown on the left in the picture below, here we take the [red-yellow] block as an example), but the other three cannot be returned to their original position. , then the side (red side) where [red-yellow] is located is defined as the front (F). Turn according to the steps shown in the figure to return all the four edged middle blocks to their original positions, or the next situation will occur.

Rotate the top layer (U). If only the edge middle blocks of the 2 adjacent faces can be returned to their original positions, then the two sides where the two edge middle blocks are located will be designated as the right side (R ) and back (B). Follow the same steps to turn all the middle pieces of the edges back into place.

Rotate the top layer (U). If only the middle block of the 2 opposite sides can be returned to its original position, then choose any direction and rotate it as shown below., that is, the above two situations will occur.

Note: If you still cannot return all the pieces after following the above two situations, repeat this step 1 or 2 more times to return all the 4 edge middle blocks.

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

Step 6: Return the top corner half way

Why is it called Half return? Because this step can only move the corner block to its correct position, but it cannot ensure that the three colors of the corner block are accurately connected to the color of the surface. .

For example, the correct corner block where the three faces of red - yellow - blue intersect must be the [red-yellow-blue] block. If the corner position is not [Red-Yellow-Blue], you can use this step to move the [Red-Yellow-Blue] block to the correct position, but After moving to the correct position, a situation like the picture below may occur, that is, the colors are just staggered. We will completely reset the misplaced colors in step seven.

When one or more corner blocks are in the correct position, but the colors are not necessarily connected correctly: Make any of the corner blocks in the correct position face you (same direction as the picture below) , rotate the Rubiks Cube according to the steps shown in the figure, so that all the top corner blocks can be half returned to their original positions. If it is still not in place, repeat this step (make any corner block that is in the correct position facing you and turn it as shown....)

If each top-level corner block is not in the correct position: Choose a direction at will and rotate according to the steps shown in the figure to return to the first situation or return it completely.

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

The seventh step is to return the top corner and the Rubiks Cube is completed

After completing step 6, the four corner blocks on the top layer should be in the correct position, but the colors will not match. This step will completely reset the misaligned corner pieces. (Although there are a lot of words, this is the simplest step! You are almost done! Read all the words below before trying again)

No matter how many corner blocks are still half returned at this time, select any corner block half returned so that the corner block is as shown below The direction shown on the left is towards you. Keep repeating the steps shown (that is, making a four-step cycle).

One thing is very important here! Take a look at the picture below first. These four steps need to be cycled: R'-D'-R-D. If you keep looping these four steps, the corner block will return to its position after the third step R is turned. You must not stop at this time, and you must continue the fourth step D to make these four steps whole!

Note: After a corner block is completely returned to its position, the lower two layers of the Rubiks Cube may be disrupted, but it doesn't matter, ignore it and continue with the following steps:

Rotate the top layer (U)

clockwise so that the other half corner piece is facing you, then repeat the steps shown above without stopping. Do the same until the corner piece is fully in place. At this time, the lower two layers of the Rubiks Cube may be disrupted, so ignore it. Turn the top layer (U) clockwise so that the other half-returned corner piece faces you in the direction shown on the left in the picture below, then repeat the same steps... (You should see it at this point This is a cycle, right?) After all the corner blocks are completely returned to their positions through this cycle, the Rubiks Cube will be completed!

Bu Yi posted a comment on the PO here. I feel like he explained it very clearly! I hope everyone has to help! ! : "The rotation of the U layer in the seventh step has a prerequisite: keep the entire Rubiks Cube red as the front, and the adjusted block must be in the upper right corner of the front." Quote @walking-I got lost: "Step 7, understand it this way. First, according to the picture in step 7, the unaligned block is in the upper left corner, which is yellow on the left, red on the right and blue on the right. Then start the step The purpose of the seven-step process is to turn left red, right blue, and upper yellow. You may not understand it from here. Listen to me. After the goal is achieved, the bottom layer will be messy. Don’t care. Keep the bottom two layers clean.Change, turn the top layer clockwise so that the next corner piece is facing you, continue with step seven, and its done easily. ”

Seven-step tutorial on how to restore the third-level Rubiks Cube with formulas and step-by-step illustrations

Finally, let me make a statement: During the seventh step, the lower two layers will indeed be messed up!!!! But ignore it!! Go to the top layer as mentioned in the steps to restore the next corner block! After all the corner blocks are restored, the next two layers will be completely restored!!!

Hope this Rubiks Cube tutorial can help you complete your first Rubiks Cube! Good luck!