Lego Robot solves the Rubik’s Cube in 3 seconds!

Using a mobile phone to see the pieces, this Lego robot is able to beat all Rubik’s Cube records. In fact, we can check in the video that it solves the Rubik’s Cube in just 3.25 seconds.

Do you think that a human can beat that?

Solve the Rubik’s Cube in 20 movements

One of the most famous questions related to Rubik’s Cube is: “How many movements are required to solve the Rubik’s Cube?” That is, what is the minimum number of moves I need to solve any Rubik’s cube position.

It may seem that this is an easy problem to solve using today’s computers. However, a Rubik’s Cube can be in so many different positions, that this problem can not be solved testing positions one by one.

God number is 20

Because of the headaches that caused this issue, the number of moves needed to solve any Rubik’s Cube was called “god number”. In 1981 it was discovered that this number was bounded between 18 and 52. The margin of error was decreased in 1995, reducing the uncertainty between 20 and 29 movements.

Finally, in 2010, 29 years after the first estimation, it was found that the God number was exactly equal to 20. That is, any position of Rubik’s cube can be solved in 20 moves or less. To obtain this number were necessary Group Theory skills (remove symmetries and related positions), and the use of Google supercomputers.

Can I solve the Rubik’s cube in 20 steps?

Because this information is not always given accurately, many people wonder if there is an algorithm they can use to solve the Rubik’s cube in 20 moves. Nope. Keep in mind that even if you can solve the Rubik’s cube in 20 moves, these moves will be completely each time. And because of the large number of possible positions, this knowledge can be useful to solve a Rubik’s cube with a computer, but not for a person.

So if you want to learn how to solve the Rubik’s Cube, you better start by our tutorial

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You will figure out how to solve it

figure-out

Just because you haven’t got it all figured out,
doesn’t mean you never will.
Some day you may even look back,
and wonder why you were ever worried.

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Rubik’s Cube Solutions (without notation)

Years ago, most of the websites used strange notation to show how to solve a Rubik’s Cube. And, nowadays, a lot of the websites are still using them.

notation2

One of the worst things about notations is that you have to learn something before learning how to solve the Rubik’s Cube. As a consequence, many people think that solving the cube is something to difficult for them.

notation

When I started to create this website, I wanted to show the simplest solutions to solve the Rubik’s Cube: no letters, no strange symbols, no notation at all. Only nice pictures.

rubiks cube - step2-c1

Nowadays, there are more websites that also follows the ‘no-notaton’ philosophy. One of them is Rubik’s Solver, that offers a very simple guide to solve the Rubik’s Cube without notation.

And what do you prefer? Notation or no-notation solutions?

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It took Erno Rubik one month to solve his own puzzle

erno-rubikDid you know that it took Erno Rubik, the creator of the Rubik’s Cube, more than one month to solve its own creation? In fact, we was not even sure if there was a method to solve it.

But for me, it was a code I myself had invented! Yet I could not read it.

It may seem surprising, but keep in mind that this website did not exist, hehe. Seriously, you have to put yourself in his shoes. Once he creates the Cube, he spends every day trying to solve it. No one had ever solved it. In fact, no one had attempted to solve it. Day after day, without achieving any progress most the days, must be exhausting.

Is like when you decide to go home after a nice walk in which you have seen many lovely sights. I decided it was time to go home, let us put the cubes back in order. And it was at that moment that I came face to face with the Big Challenge: What is the way home?

If you want to learn more about his life, I recommend you to read this Erno Rubik’s Biography.

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Life is like a Rubik’s Cube

The Cube is an imitation of life itself – or even an improvement on life. The problems of puzzles are very near the problems of life, our whole life is solving puzzles. If you are hungry, you have to find something to eat. But everyday problems are very mixed – they’re not clear. The Cube’s problem depends just on you. You can solve it independently. But to find happiness in life, you’re not independent. That’s the only big difference.

Erno Rubik, Rubik’s Cube Creator

The Cube and I (Rubik’s Cube Poem)

Last week I bought home a rubiks cube
To test my skill against its might
Well I said this silly toy
This plastic puzzle kids enjoy
Ill solve this night!

The night fled by the dawn arrived
The cube unsolved in disarray
Against each turn and twist
Gave me an aching wrist
As I worked through the day

At last I lined up one side orange
At first this seemed a great success
But it bought me little cheer
But the other five remained I fear
A multicolored mess

Two days flew past then three and four
My work neglected went undone
Though green lined up columns true
How come red was mixed in with the blue?
Does rubik call this fun?

A thousand times I turned the cube
My fingers gripped around its parts
Until the truth at last set in
I didn’t lack the will to win
I simply lacked the smarts

No more I said to rubiks cube
Shall you enslave me in your power?
Thus liberated from its hold
Gave it to a eight year old
Who solved it in a hour

Jarrod Wakefield

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Interview to Patrick Bossert about Rubik’s Cube

Patrick Bossert was just 12 years old when he published the book You Can Do the Cube with the Rubik’s Cube solutions. It sold over 1.5 million copies and became the global best-seller of 1981.

In this nice video, he tells how a 12 years old child became a best-seller writer.

I’m sorry for that strange intro