Surely everyone knows the famous puzzle from childhood, named after its creator, Ernő Rubik. Quite quickly it gained popularity and reached the most remote corners of the planet.
Without proper dexterity, you won’t be able to put together a puzzle, even after doing a hundred manipulations, but relatively recently specialists from Inc. learned how to solve a Rubik's cube in 20 moves. They managed to achieve this phenomenal result with the help of a computer, which was given the task of analyzing all possible combinations.
Where did the Rubik's cube come from?
Back in 1974, the Hungarian architect and teacher at the Academy of Applied Arts Ernő Rubik thought about the optimal way of knowing
He wanted a new invention to help students explore the world, and one day a sensational idea came to his mind - to create a puzzle. The task is seemingly elementary - rotate the rows of the cube until each side becomes the same color. But the scheme for assembling a Rubik's cube is not so simple and can take even several hours without yielding a result. The students appreciated and became interested in the new toy. At that moment, the creator had no idea that many years later scientists would rack their brains, solving the puzzle until they figured out how to solve a Rubik's cube in 20 moves.
How did it gain worldwide popularity?
At first, the original toy was not popular among investors. It was believed that its production would not be profitable, since solving a Rubik's cube could only be of interest to intellectuals. However, one small company decided to invest in this unusual project, and the puzzle began to conquer Budapest.
A few years later, Tibor Lakzi, an intermediary for one of the German companies, arrived in the city and became interested in the original puzzle, which was very popular among the townspeople at that time. Realizing that spreading this amazing invention around the world could bring huge profits, he decided to promote the Rubik's cube. For aspiring businessmen Lakzi and Rubik, the main difficulty was finding investors. But thanks to Tibor's economic education and commercial acumen, the owner of Seven Towns Ltd, Tom Kremer, was soon attracted to the project. He took on large-scale production and distribution, which helped the cube become popular throughout the world.
"God Algorithm"
Since 1982, competitions have been regularly held in many countries, in which the main task of the participants is to quickly solve a Rubik's cube. In order to solve a puzzle as quickly as possible, it is not enough just to have good dexterity and intelligence. A person should know the optimal scheme for solving a Rubik's cube, allowing him to spend as little effort as possible. The minimum number of steps required to solve a given problem is the “God Algorithm”.
Many scientific minds and simple amateurs tried to find a solution. At one time it was believed that the minimum number of steps from any position was 18, but this theory was later refuted. Many years were spent searching for the optimal sequence, and only in 2010 scientists managed to find out how to solve a Rubik's cube in 20 moves, regardless of the position of the puzzle before the assembly began. This is currently an absolute record.
Who is faster - a machine or a person?
At the moment, the fastest person is American schoolboy Colin Burns - he managed to solve the puzzle in less than 5.5 seconds. And the robot, assembled by British engineers from EV3 construction kit parts, coped with this task in 3.253 seconds. The advantage of the mechanism is not only that the work of all its parts is more coordinated than human actions. Scientists gave him 4 arms, which allow him to perform all operations 2 times faster.
How to learn to collect it
There is more than one standard Rubik's cube scheme that allows you to quickly learn how to solve this original puzzle. Different assembly systems allow you to approach the issue differently. Which one to choose is up to you. Of course, it is unlikely that without the computer power of Google you will learn how to solve a Rubik's cube in 20 moves, but you will learn to find simple solutions in a short time. The main thing is that you have enough perseverance. No technique will help you solve the puzzle without problems if you are not willing to spend your precious time on learning.
But you shouldn’t devote all your time to this toy. Doctors noted an increase in the number of patients in psychiatric clinics after the appearance of the Rubik's cube. And traumatologists began to regularly encounter symptoms that were later called “Rubik’s syndrome.” It manifests itself in the form of acute
Assembly diagram
There are several schemes that allow beginners to quickly learn how to fold a Rubik's cube. One of them is attached to this article:
- First you need to assemble a cross, the ends of which continue on adjacent faces. There is no universal technique - everything comes with practice.
- Next, you need to complete the entire side on which the cross was assembled, and assemble a belt from the parts around it. It is important to ensure that each belt is the same color.
- Now you need to collect the second belt and move to the opposite side of the cube.
- We assemble the cross on this side in the same way as at the very beginning.
- We complete the entire side.
- Now we put the corners of the cube in order - we make sure that the colors on them match the colors of the sides to which they are turned.
- All that remains is to correctly rotate the parts that have only 2 sides. The cube has been completed.
Now you can learn how to solve one of the most popular puzzles in the world. The universal Rubik's Cube diagram will help you with this.
For more than 40 years, the Rubik's Cube has sold 350 million copies across the planet and has become one of the most popular toys of the 20th century. In 1980, every fifth inhabitant of the Earth tried to solve it, and in the 2000s, robots and computer systems joined in solving the puzzle. Today there are more than 30 types of cubes.
They come in intricate shapes and levels of complexity. The 3x3 Rubik's cube is considered a classic cube. With his help, Erno Rubik, a teacher at the Hungarian Academy of Applied Arts and Crafts, hoped to clearly explain to students the mathematical theory of groups and the advantages of spatial thinking.
It is with this puzzle that beginners are recommended to begin their acquaintance with the Rubix family.
How the classic Rubik's cube works
The original toy with a 3x3 configuration consists of 26 cubes, which are divided into central and edge ones.In the very heart of the cube, in place of the “invisible” cube, there is a cylindrical fastening mechanism. It is connected to all external elements and is responsible for ensuring that they rotate freely relative to each other.
But there is one subtlety: the mechanism is connected directly only to the central parts. The side and corner cubes are held onto them (and each other) using special protrusions. The design of the model is designed so that only the edges can be moved. But there are no restrictions on the coordinate axes.
Rubik's Cube and God's Number
A colorful puzzle just seems like easy fun. It took the professor a month to develop an algorithm for assembling his own invention. According to combinatorics, the possible states of a Rubik's cube are 43,252,003,274,489,856,000. Translated into human language, this figure sounds like 43 quintillion. Surprisingly, this is not the limit: the value will double if we take into account the difference in the location of the central elements.
It would take a professional speedcuber 4,200 trillion years to go through all the combinations. The unattainability of the goal does not prevent fans from looking for the easiest and fastest way to build. A new world record was set last fall by 15-year-old Patrick Pons from the USA. The teenager solved the problem in 4.69 seconds and 17 rotations.
The minimum number of steps included in the algorithm for solving a classic cube from any position is 20. It is called the “number of God.” Not everyone can play by such strict rules. On average, an experienced speedcuber makes 40 to 50 moves.
Assembly formula for beginners 
The 3x3 puzzle follows a general principle. Much depends on its condition at the time of assembly. To better understand the structure of the cube, you can disassemble it into parts and then reassemble it again. It is important to place the edges correctly.
The instructions for assembling the classic Rubik's cube consist of seven points:
- Creating a cross on the top plane
- Working with the corners next to it
- Gathering the middle ribs
- Creating a cross from below
- Working with the lower ribs
- Adjusting the bottom corners
- Final spread
Rarely can we allow ourselves the joy of doing absolutely nothing, when we give rest to our arms, legs, head and the entire body as a whole. Most often it only seems to us that we are idle. This is because man is very active by nature. He is bored and incomprehensible to the amorphous movement through life. If he has a free moment, he can set himself an original goal. For example, solve a Rubik's cube. The instructions for assembling this puzzle are very specific, but it is quite possible to understand it.
Some historical facts
More than 40 years ago, the Hungarian sculptor Erno Rubik showed the world his famous puzzle, which was named after the author’s last name. Then the inventor was teaching industrial design and architecture. There is a version that he invented the cube for a textbook, with the help of which one can clearly explain the basics of mathematical group theory. The inventor set the students a difficult task - to make individual cubes rotate freely in place, without damaging the structural unity of the puzzle. Accordingly, the first testers were Rubik's friends and students.
In 1975, the Rubik's cube was patented, but only two years later the production of an industrial batch of cubes was launched. The first to produce them was a small Budapest cooperative, which positioned the Rubik's cube as a New Year's toy. Assembly instructions were not included, but the item was captivating with its abundance of colors and its mystery. The toy became truly universal and was offered to all categories of the population. The second surge in popularity occurred when the cube was seen in the hands of a waiter by German entrepreneur Tibor Lakzi, who is interested in mathematics. He began promoting the product in tandem with Tom Cramer, a successful game inventor. Together they were able to launch a “cubic” invasion and produce more than 100 million toys.
Time frame
So, how long does it take to solve a Rubik's cube? The instructions are not particularly attractive to novice puzzlers. Therefore, it will take a long and painful time to collect. Many people can’t stand it and quit what they started halfway through. But assembling this puzzle perfectly develops motor skills, stimulates the mind, calms you down and helps you understand yourself. Over time, people realize that it is very difficult to assemble a puzzle at random. We have to resort to proven algorithms. Many people get hooked and switch to high-speed assembly. Such people are called “speedcubers”, and the process itself is called “speedcubing”. There are even official competitions held under the auspices of the World Cube Association. The current world record is 5.55 seconds. It was installed by Mats Volk. Before him, the world record was 5.66 seconds. According to unofficial data, he achieved a result of 4.79 seconds.
For beginners
So, you have a Rubik's cube in your hands. You have not yet studied the assembly instructions and you want to figure out for yourself how the puzzle works. The toy has 6 sides of different colors. When purchased, all sides are assembled and have cubes of the same color. Let your imagination run wild and spin the cube on all axes for a minute. As a result, you are faced with a confusing puzzle that, it would seem, cannot be unraveled. Many people recommend completely disassembling the cube into parts before direct assembly to ensure the correctness of the mechanism. If everything is correct, then you can begin the process. Assembly for beginners consists of seven stages, each of which is quite achievable even for a child.
Step-by-step instructions: how to solve a Rubik's cube
You will need to focus on the white side. Imagine that this is the base that holds the entire structure. After each “machination”, check the white side so that its integrity is not damaged. At the first stage, collect where the white square is in the center. Note that the center sectors on each side tell you which color to collect where. At the second stage, you need to assemble the corners of the white side. Next come the ribs of the white layer, the cross in the last row. Afterwards you need to move on to arranging the edges and corners of the last layer and rotating the corners.
Among the most common
The instructions for assembling a Rubik's cube by the author are very popular. This is a high-speed assembly method that does not require memorizing a large number of formulas. The main thing is to understand the principle. In the process, a cross is assembled on one of the sides. The first layer is assembled simultaneously with the second. Next comes the orientation and rearrangement of the elements of the top layer.
On intuition
If you don’t want to memorize formulas at all, then you will like the step-by-step instructions for a Rubik’s cube according to Valery Morozov’s method. Here you need to memorize the basic principles of assembly. First, eight corner elements are assembled. Next, the four ribs in the middle layer are gathered into a cross on the side. The remaining eight ribs must form correct pairs. Finally, the six central sectors are installed on their edges.
We walk along the stripes
If you have already tried and even managed to complete the puzzle, then you can try the so-called stripe method. It is suitable for a 5*5 cube, but it is better to train on a smaller version - 3*3.
To master the method, you need to be able to distinguish between sides and be able to rotate the cube clockwise and counterclockwise. The assembly begins with the notorious white cross. Next, it needs to be extended to the corner elements. Your task is to ensure that the central elements of the sides coincide with the top ones, which extend from the white cross. The white corner elements need to be moved to the same side. An inexperienced person can master the Rubik's cube this way. The beginner's assembly instructions for this type are not that simple, but they give consistent instructions. Be prepared for the fact that this is not an easy task.
Basic knowledge
So it turns out that many people themselves come up with an algorithm for how to solve a Rubik’s cube. Step-by-step instructions are not particularly important to them. Maybe you can invent your own method too? Everything is possible, but there is basic knowledge that will be useful to every person. So, the cube has a frame - a cross, on which the central parts are attached. All elements are movable, and the cube itself rotates in all directions. The base side is usually taken to be the white side, and the opposite side is usually yellow. Rotation of parts is possible clockwise, counterclockwise and 180 degrees. It is further known that the simplest assembly scheme includes seven successive stages. The white cross is always assembled first
Main stage
So, in front of you is a Rubik's cube, instructions for beginners, and about half an hour to spare. This is enough to master the basics of assembly. Initially, you should not chase time. Practice and only practice will help you become a speedcuber. In the meantime, try to master the main stage - assembling the cross. By the way, successful speedcubers perform it intuitively, since there are no formulas. The main thing is to find the side with the white cube in the center. Remember that each edge cube has two colors and, accordingly, it must coincide with two centers - white and colored. Now check the side with the white center for any white ribs. If they are, then simply rotate the bottom of the cube to align the edge with the second center. Now look at the opposite side: if there are white edges there, then it is quite easy to return them to the white side. The remaining elements can be adjusted to the top by lifting the cube with the white side to the top and turning it towards the center.
Start the build process
The first two layers can be laid out quite simply. This is a very problematic moment for those who are wondering how to solve a Rubik's cube. The instructions for beginners will be a visual aid, but in general this stage can be completed intuitively. The main problem with this is installing the corner cubes in the first layer. Speedcubers have a special technique for this, which they call “bang-bang.” By the way, it also has its own formula. Try to always keep the cube with the white center (and side accordingly) down. Look for a side cube that matches the colors of the border sides. Lift the side edge up, and then move it to the side, opposite from the side of the cross that “went” to the other edge. The mechanism for lining up corner cubes remains identical - searching for a cube in the color frames, bringing it to the desired field, and then moving it to the side with a “new” cube. After installing the corner cubes in the bottom layer, you can move on to the second one from the bottom. The algorithm is similar, but searching for cubes becomes more difficult and longer. These same rib cubes are set in place using one formula and its mirror image. Before lining up, you need to rotate the top layer and place the rib cube in the right place. Always make sure that the color of the side edge matches the color of the central sector of the middle layer. Yes, and don't destroy the top white cross. If you are building the white side, then a priori its integrity will not be violated, but if the colored side is being assembled, the destruction of the white cross is fraught with complete chaos in the puzzle. With similar mirror repetitions, you can completely assemble the white side and the two lower layers on each side. Plus, as a result of your work, the central sectors of the sides should coincide with the centers. Now you are left with the final step - collecting the corner cubes on the top side.
Many people solve Rubik's cubes in their free time and try to do it faster and easier than others. Since 1980, the search for the so-called God algorithm for high-speed assembly began. Mathematicians, programmers and simply lovers of scientific riddles are looking for a method that allows them to solve a puzzle in a minimum number of moves. In 2010, programmer Thomas Rokicki, mathematicians Herbert Kotzemba and Morley Davidson, and engineer John Detridge were able to prove that any puzzle configuration can be solved in a maximum of 20 moves. In this case, any rotation of the face is considered a move.
So, you have chosen and bought your first one. It's time to learn how to assemble it.
You can either learn how to assemble it directly from this page. So, how to solve a 3x3 Rubik's cube? Let's get started!
3x3 cube design
The 3x3 Rubik's Cube has six different colored sides and consists of 26 elements that are fastened together and move freely among themselves.
Cube elements are divided into three types
What does a 3x3 Rubik's Cube consist of?Fig.1 basic elements of a Rubik's cube
Fig.2 The crosspiece is the internal mechanism for attaching the Rubik's cube.
To solve a Rubik's cube you need to know the formulas for assembling it. Therefore, first of all you need to learn the language of rotations.
The language of rotations. What do the letters mean in the formulas for solving a Rubik's cube?
Main
- The cube has a top, a bottom, a right, a left. When rotating, keep the cube in one position relative to you, and simply rotate the desired side. REMEMBER THIS!
- The centers of the cube do not move anywhere, they always remain in their places relative to each other, because they are fastened together by a cross (Fig. 2).
Rubik's cube formulas are written with letters that indicate the rotation of a certain side of the cube 90° clockwise. If there is an apostrophe (') next to the letter, the side is rotated counterclockwise. The number before the letter indicates the number of turns.
We remind you: when you rotate the sides, the cube itself remains motionless, you simply rotate the desired side.
Practice rotating the desired sides of the cube clockwise and counterclockwise. Let your fingers remember the movement, and your mind – what and where to rotate if there is a certain letter in the formula. This will make it a lot easier for you to learn assembly algorithms.
As a respite, we recommend that you learn about the differences between professional speed cubes and beginner cubes. And is it worth it for a beginner to immediately invest in the purchase of an expensive sports cube? Briefly, our opinion: on the one hand, it’s damn nice to twirl the cosmically mobile MoYu Hualong in your hands, for example. An elite cube can be a great motivation for speed building. On the other hand: beginners may not notice the difference between a budget cube and a sports one, if the budget cube is good and fast, but we don’t keep others :)
Stage one - assembling the first (bottom) layer of the Rubik's Cube.
Assembling the cross
Assembling the cross is the first step in assembling the first (bottom) layer. Take the cube at your convenience and study the position of the centers. Remember the color of the bottom and top. In our case it is blue. Until the end of the first assembly stage, keep the blue center at the bottom and the green at the top.
Your task when assembling the cross: one by one, find four on the cube ribs With blue color and move them down to blue center so that they second rib colors coincided with colors of the lateral centers. The picture shows ribs with a blue color that have become at the bottom, and their second colors yellow And red matched the colors of the side centers - this is correct.
In order to assemble a cross, you do not need special algorithms, but for example, let’s look at situations that may occur and test your understanding of simple algorithms.
Attention! As soon as you have started to perform an algorithm not an algorithm for assembling a cube, do not twirl the cube itself in your hands until you complete the combination. The centers of different colors must maintain their position. For example, yellow is in front of you, blue is below, red is to the right.
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Assembling corners
So, the cross is assembled. We move on to assembling the corners - the final stage of assembling the first layer. Take the cube with the cross facing down. Please note colors of the three centers, between which there should be corner, find it on the cube. In our case we are looking for blue-yellow-red corner. There is only one in the cube.
We put the corner in the top layer above the place where it should go down and do the URU’R’ algorithm. If the corner is in its place and the colors from the centers match, then we move on to the next corner. If not, then we repeat the algorithm until it becomes as we need.
Interesting fact: if the cube is solved and we repeat this algorithm (URU’R’) six times, then the cube will get confused and then solve.Let's see what happens to our corner after each algorithm. All of the following options may be available to you during assembly.
Stage two - assembling the second (middle) layer of the Rubik's cube
Hold the cube with the blue side facing down and the green center facing up.
In order to assemble the second layer, we need only one algorithm, but before executing it we need to prepare the cube - bring it to one of the two possible situations shown below. Find in the top layer any edge who has no green. Rotate the top layer (movements U or U') so that the side color of the edge matches any of the side centers. Now take the cube so that the coinciding center is facing at you, and blue, as before, remained at the bottom. In our example we found yellow – red edge. Lateral rib color – yellow. Rotate the top layer and align the edge with the yellow center. You may also have an option when you combine red edge with a red center, and yellow the rib color remains on the top side.
We take the cube with the yellow or red center towards us and get one of three possible cases.
THIRD CASE
The rib is already in place, but twisted. We need to “replace” it with any edge with a green color from the top layer, then we again bring it to the two cases that are indicated above and solve it.
The third stage of assembly is assembling the top layer of the cube
We are approaching the last stage - assembling the 3rd (top) layer of Rubik. First, we need to arrange the edges on the top layer so that they form a green cross. After assembling the first two layers, on the top layer you will get one of the four cases shown in the pictures. Find the one you have and perform the algorithm FRUR'U'F' to make a cross. You can start with a “dot” and gradually come to a “cross”.
Important! Before each start of the algorithm, hold the cube in your hands exactly as shown in the pictures!
So, at the top we have a cross.
We combine the side colors of the ribs with the side centers.
By rotating the top face (U or U’) trying to combine side ribs colors With lateral centers. All four colors must match (yellow, orange, white, red). If four do not match, then put the layer so that they match at least two ribs.
If you don't find two matching edges, then run the algorithm R U R’ U R 2U R’ U and look for the ribs again.
So, on the top layer we have a cross assembled and the ribs are correctly placed.
We put the corners in place.
Check that the corners of the top layer are in place; the corners may be twisted. But the main thing is that they have the same colors as the centers between which they stand. If so, then skip this step and move on to the next one.
If the corners need to be placed correctly, then take the cube in your hands so that there is a corner on your right that is in its place and perform the algorithm without changing the position of the cube: U R U’ L’ U R’ U’ L
If there is not a single corner that stays in its place, then do the algorithm given above from any position and the corner will appear.
The cube is almost complete, all that remains is to twist the corners.
You may have two, three or four twisted corners. Corners are twisted by a simple algorithm R' D' R D R' D' R D,
Important!!! This algorithm only works for one corner, which is located to your right. The secret is that when the corner becomes correct, you need to turn the top edge (U or U’) and substitute the next corner that needs to be twisted in its place. We can repeat the algorithm from 2 to 5 times and it will seem to you that the cube is confused, don’t worry, it will come together. The main thing is not to let go of the cube, not to twist it in your hands until you have completed the entire sequence of algorithms.
Let's consider the most complex case with four twisted corners:
Congratulations!
Now you know exactly how to solve a Rubik's cube! Disassemble and assemble your cube according to these instructions until you remember all the algorithms!
And then a huge world of mechanical puzzles will open before you, the assembly formulas of which are based on the formulas of a 3x3 cube!
How to entertain yourself when you have a free minute, but nothing to do? Solving all kinds of puzzles is a great option!
The most popular puzzle in the history of mankind is rightfully considered the famous Rubik's Cube, invented back in 1975 and named after its inventor. After his birth, he “took over the whole world” with lightning speed. Everyone at least tried to solve a Rubik's cube, but not everyone was able to do it.
How to solve a Rubik's cube? Without outside help, it is quite difficult to do this absolutely independently; this is far from a child’s task. You need to know the algorithm for solving a Rubik's cube.
By the way, it has been proven that for any initial situation, a cube of size 3x3x3 can be completely assembled in no more than 20 moves (turns). The number 20 is therefore also called the number of God, and the algorithm that solves the cube in the minimum number of moves is called the algorithm of God.
If you have long wanted to learn how to solve a Rubik's cube, then this post is just for you. Let's put an end to this task once and for all and have a little celebration for ourselves. Having done this, you can safely put a plus sign on the list of your achievements and then show off in front of your friends who do not know how to do this. So, we present to your attention an algorithm for solving a Rubik's cube.
The pictures show diagrams of actions, following which we will eventually be able to arrange the colors on the sides of the cube.
First, let's understand the notation that is used in the diagrams, and which we will operate in the process of studying the algorithm for solving a Rubik's cube of the classic size 3x3x3.
Side designations:
- F - frontal (front)
- Z - back
- L - left
- P - right
- IN - upper
- N - lower
Now let's deal with names of turns, which we will apply to the above-described parties.
A letter without any prefixes indicates a rotation of the indicated side by a quarter of a full turn (90 degrees) clockwise(For example, " F"means we turn the front side a quarter turn clockwise, i.e. one shift).
Letter with " ’ " means turning the indicated side a quarter full turn (90 degrees) counterclockwise. Thus, the inscription “ F'" means that we must turn the front side a quarter of a full turn counterclockwise.
Letter with " ’ ’ " means that we turn the indicated side in any direction half turn(180 degrees)
Let's fix: inscription L ’ ’ PF' means that we first turn the left face half a turn, then make a quarter turn of the right face clockwise, and complete the combination with a quarter turn of the front face counterclockwise.
Arrangement of flowers.
Select the bottom color, it will remain bottom throughout the cube assembly process. Instead of the gray color, which is shown in the diagrams of the algorithm for solving a Rubik's cube, there can be any color, it doesn't matter. The place where we moved the part we need will be shown in black. Let's look at the first drawing.
Let's move on directly to the assembly and the answer to the question “How to solve a Rubik's cube?”
Step #1.
You need to assemble a cross on the bottom side of the cube, so that all the middle side squares correspond to the middles of the side faces (look at the diagram). Unfortunately, there is no ready-made algorithm here. You'll have to tinker a little and use your brain.
Step #2.
The second step will be to assemble the bottom layer. We need to put the bottom corner cubes in place. Everything here is much simpler than in step 1 - there are ready-made turn patterns.
If the corner is in the lower layer, but is incorrectly oriented, then it must first be lifted up, rotated the way we need it and put in its rightful place. We look at the picture and apply the techniques given there. Each turn corresponds to a formula, which we dealt with a little higher.
Step #3.
The bottom layer is assembled. Let's move on to the second, middle layer. We place the 4 side cubes of the second layer in their rightful places. If the side cube is in its place, but not turned correctly, then you can turn it over by following these steps - look at the diagram.
Two layers are assembled. There is a final push left, but don’t relax ahead of time.
Step #4.
The task is to turn the middle cubes of the top layer over with the color we need facing up. It doesn’t matter whether they are in their place or not, at this step it is not so important. Using one of the proposed action schemes, we turn the sides of the upper side with the desired color facing up.
Step #5.
On the top face there is a cross of the desired color, but as you can understand from the previous paragraph, the side cubes of the top face may not be in their places. The task of step 5 is to put them in their place.
There are 4 options, each of which has its own effective algorithm of action. We apply them and install the sides in place. The cross on the upper edge can be considered fully assembled.
Step #6.
Let's continue to figure out how to solve a Rubik's cube? And we have almost reached the finish line.
We install the corners of the top edge in their places, but they can be turned upside down.
In this case " in its place" means that the corner contains the colors of all the central squares of those faces at the junction of which it is located.
Here are three rotation formulas that correspond to three options for moving the corner cubes. We remind you that the corners may be oriented incorrectly, but they should fall into place.
Step #7.
Friends, we have reached the finish line! There is one last step left in solving the Rubik's cube.
The corner cubes are in place, but some may be oriented incorrectly. They need to be turned over. To do this, you should perform the operations described in the diagram of step No. 7 in pairs (look at the figure above).
Did it work? Well, of course it worked! In just 7 steps, we have solved the puzzle that has kept millions of people awake and still unable to sleep.
Naturally, you did not remember all the steps and formulas for turns and movements at one time. Here you just need to practice and get better at it.
The main thing is that you now know exactly the answer to the question “ How to solve a Rubik's cube»?