how to solve rubiks cube in 20 moves

After decades, a group of mathematicians, academics, and engineers discovered a number that explains life, the universe, and everything in between. That is the biggest secret of all – the God's Number.  The God's Number is the maximum number of moves required to solve any of the 43 quintillions or to put it in perspective, 43,252,003,274,489,856,000 permutations combinations of the cube. Apart from God Number you can also Rubik's cube under 30 second using F2L method. 

Studies and research have proven that God's Number is number 20. This discovery is fairly recent (July 2010). The term God's Number was coined to understand that a mind with the capability of finding the shortest sequence of moves to solve any scramble would have to be so much more powerful than the mind of the common man. Such a mind, mathematicians believe, could be possessed only by a Deity. 

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This is how you can understand this concept better. It is known that 490 million combinations are required for all the 20 moves to be solved. Even though 490 million seems like a big number, it is only a tiny fraction of the 43 quintillion possible combinations. However, the number of combinations that can be solved in 19 moves is quite closer to 1.5 quintillions. 

Therefore, God's Number is much closer to 19 than 20 moves. But even if one scramble sequence was impossible to solve in less than 20 moves, God's Number would still be 20!

The Super-Flip

In 1995 Michael Reid (mathematician) found a Rubik's Cube configuration called the 'super-flip'. He proved that it requires at least 20 moves to solve. This can be performed using an algorithm. 

R L U2 F U’ D F2 R2 B2 L U2 F’ B’ U R2 D F2 U R2 U

1. Rotate the right face clockwise

2. Rotate the left face clockwise

3. Rotate the front face clockwise twice

4. Rotate the font face clockwise

5. Rotate the up face counterclockwise

6. Rotate the down face clockwise

7. Rotate the front face clockwise twice

8. Rotate the right face clockwise twice

9. Rotate the back face clockwise twice

10. Rotate the left face clockwise

11. Rotate the up face clockwise twice

12. Rotate the front face counterclockwise

13. Rotate the back face counterclockwise

14. Rotate the up face clockwise

15. Rotate the right face clockwise twice

16. Rotate the down face clockwise

17. Rotate the front face clockwise twice

18. Rotate the up face clockwise

19. Rotate the right face clockwise twice

20. Rotate the up face clockwise. 


This algorithm will lead to a position wherein all the single corners are solved, and every edge is exactly in its place. This was the first position that was realized could not be solved in less than 20 moves. 

If you wish to give it a try, check out this video by RedKB that does a superflip on larger cubes as well.

Many upper bounds, however, were proven over the decades. Morwen Thistlewaite, an early analyst of the mathematical cube, proved that any cube could be solved in 52 moves at the most.

how to solve rubiks cube in 20 moves

Tomas Rockicki, a computer programmer, designed a strategy for finding shorter solutions for Rubik's Cube configurations. His strategy was based on a previous work done by Herbert Kociemba that divided solving a Rubik's Cube into two parts based on a set of 19.5 billion partially-solved configurations with short solutions.

God's Number for 2x2x2

how to solve 2x2 rubiks cube in 20 moves

The 2x2x2 Pocket Cube has about 3,674,160 permutations. However, God's Number has been proved to be 11 moves using half-turn metric, or 14 using the quarter-turn metric wherein half turns count as two rotations.

God's Number for 4x4x4

how to solve 4x4 cube in 20 moves

The 4x4x4 Rubik's Revenge has no determined God's Number yet. This is because the centrepiece on the Rubik's Revenge is not fixed. Due to which, parities occur. However, it is estimated that God's Number for the 4x4x4 cube is between 30 and 33.

Recommended ReadHow to Get Faster in Rubik's Cube [Beginners to Pro]

Conclusion

The strategy for answering the question of God Number took over three decades! It required a set of supercomputers to finally find out answers that suggested that this may not be the ideal approach to solving a cube hobbyist. But this is the kind of problem that mathematicians love to play around with! Since God's Number for the higher cubes (4x4 and beyond) have not yet been known, we should prepare ourselves for more discoveries in the future!

18 comments

enderman

enderman

I wold just like to reprt this and yaa

candy c
candy c

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
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shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
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shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
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shit bich

John

enderman

enderman

I wold just like to reprt this and yaa

candy c
candy c

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

candy corn
candy corn

February 20, 2022 at 17:00pm
fuck
shit bich

John

guys just hear me out

guys just hear me out

It wasn’t a scam.
It worked for me.
They made it really hard to understand.
Maybe you’re just doing it wrong.

Kerplowy

Kerplowy

Turn 3 (U2) should say upper face twice not front face twice – the algorythm
(R L U2 F U’ D F2 R2 B2 L U2 F’ B’ U R2 D F2 U R2 U) is correct, but the list of turns isn’t.

SussysaurusRex

SussysaurusRex

FAKE! Dirty scam! completely ruined my entire Rubik’s Cube! Never using this site again. >:(

bobo the smarty

bobo the smarty

Stypid posty f=don’t work my son is crying and now i going to get milk

anonymous

anonymous

This doesn’t work

candy c

candy c

fuck
shit bich

candy corn

candy corn

fuck
shit bich

candy corn

candy corn

fuck
shit bich

candy corn

candy corn

fuck
shit bich

candy corn

candy corn

fuck
shit bich

candy corn

candy corn

fuck
shit bich

candy corn

candy corn

fuck
shit bich

John

John

It’s not a scam. It worked the first time I tried it. run the above algorythm, and it will give you a superflip. Run the algorythm again, it will solve the cube. Here’s another way to get asuperflip:
(U’ M U’ M U’ M U’ M) Z Y (repeat this sequence 3 times)
This takes 28 moves, but it’s easier to remember. 2 turns repeated 4 times followed by 2 rotaions of the cube. Repeat 3 times skipping the cube rotations on the last one. Repeat this sequence and you’re back to a solved state.

John

John

It’s not a scam. It worked the first time I tried it. Make sure you start with a true superflip and then follow the above algorithm precisely to solve the cube in 20 moves.

qqq

qqq

dirty scam

Anonymous

Anonymous

I tried this with my child and it did not work, we went through it multiple times. I think this is just a dirty scam!

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