God's Number and Rubik's Cube - Numberphile

What is the fewest number of moves which can solve any Rubik's Cube? It's God's Number.
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This video features Matt Parker, James Grime and Katie Steckles.
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[@TacomaPaul]

I once got a solid black Rubik's Cube as a gift. Greatest gift ever. I laughed so hard.

[@dante224real1]

dude i bet you cant solve it. its a toughie!

[@JordanNexhip]

+TacomaPaul You gotta sticker it

[@EpicFishStudio]

you know what's more annoying? sudoku cube. with small thought you could say that it is possible, but IT IS NOT. You have to solve 6 sudokus at once, and you cant never be sure if any of the faces are correct until they all are.

[@winterv3vo]

Actually, a dodo cube can be used to practice speedsolving

[@stigekalder]

I once got hold of an all pink cube - it was specifically made for blondes 😁

[@josephsmith3961]

James: "Every Rubik's Puzzle can be solved in 20 Moves or Less." Me: *Hands him 17x17 scrambled.* Me: "Checkmate"

[@FluffyVu]

But those aren't manufactured by the Rubik's brand . But this might be false in the future.

[@thoperSought]

20 is specifically God's Number for the 3x3

[@cole183]

Imagine he solves it in 20 moves. Absolute chad

[@hesiod_delta9209]

​@@thoperSoughtthis raises the question of how God's number scales for different cube sizes.

[@BonJoviBeatlesLedZep]

"Google, because it's run by benevolent nerds." Oh man we were all so innocent in 2012.

[@soupisfornoobs4081]

I don't understand, can you please explain? What did I miss?

[@BonJoviBeatlesLedZep]

@@soupisfornoobs4081 Google has been involved in several scandals involving data collection and privacy breaches.

[@soupisfornoobs4081]

@@BonJoviBeatlesLedZep oh, thanks. Well I invite you to point to a mega corporation that hasn't done that

[@Djuntas]

@@soupisfornoobs4081 your attitude is also why it keeps happening. Many of us are tired, but when the masses don't care...If I had to protest in the streets or do lobby work, that would be my cause. They mess with our lives while they earn money on us.

[@soupisfornoobs4081]

@@Djuntas yes I am aware I am an indirect and unwilling participant in what they're doing. I've just given up entirely on such activism, I'm sure you can understand, megacorp Google is not going to care whatever I try and do. All I can do is support the up and coming, competition is ideal when trying to get corporate to stray from shady practices.

[@tind33p]

Being a cuber, I've thought for a while now that cube solving, and understanding how it works should be a part of standard Math classes. it's a great tool for spacial sense, group theory and a bunch of other things. awesome.

[@numberphile]

ha ha - well done and thanks for taking part

[@SoulTheSoul]

...

[@adheesh2secondsago630]

@@SoulTheSoul yt didn't had reply system back then I Guess.

[@reyanshpadhi9210]

:)

[@speedwagon1824]

​@@adheesh2secondsago630 yeah

[@lovefrombooks7]

"Because Google is run by benevolent nerds"

[@Wimpymind]

"benevolent nerds". Oh my sweet summer child....

[@guy_th18]

?

[@renellis8962]

Malevolent would have been much more accurate of them.

[@jaylewis9203]

Came here to say this

[@wow-roblox8370]

@@jaylewis9203 2013 was a different time for google

[@speedwagon1824]

🤓

[@L3G0TWK]

"This calls for wisdom: let him who has understanding reckon the number of the LORD, for it is a human number, His number is twenty." --Numberphile, 13:18

[@sp3ctum]

Minifox slow clap for the Revelations reference, I will smile for a while thinking about it.

[@MattTheCommenter]

Artism Expert same

[@Luke-qs1lv]

Minifox 66 likes on this comment lol

[@selmir369]

13 = 7 2 4 G O D

[@selmir369]

18=1+8=9=High Conscousness

[@mitchelly5324]

Must... Resist... IS THAT A 10X10?

[@reissecupfilms]

+Mitchell Yeo Is that a reference to that one video?

[@abdulmuhaimin9780]

+ReissecupFilms from that one channel?

[@reissecupfilms]

Abdul Muhaimin Yes

[@reissecupfilms]

Abdul Muhaimin the one with multiple kids who do rubik's cubes

[@Lucy-ng7cw]

Only cubes say that

[@calciumgoodness4073]

"It stops young people from going homeless, which I think is fair enough"

[@nyak63RUS]

Woo! I'm a social worker, and any charity that tries to get children and youth off the streets and into productive environments always make me feel like I'm not alone. So that's wonderful, everybody should check out what their local charitable organizations are doing to help level the playing field for kids who just need a bit of a boost. Thanks numberphile for another wonderful video!

[@numberphile]

James is a free man... But I prefer it when he's on Numberphile! ;)

[@michealpants]

no

[@mistdev]

@@michealpants no u

[@weshutchison2802]

43,252,003,274,489,856,000

[@5chmuk3r20]

Nive Video!! I learned that there are 43 quintillion possible combinations. Max number is less then 30, it is 20 moves. It is called gods number because it is very hard to think of the moves you need to do.

[@sigalig]

lol "proof by exhaustion" a.k.a. Brute Forcing it

[@souloftheage]

"Brute Force" would be a great name for the next supercomputer.

[@souloftheage]

Walwalkn Wewnrkl Well, MOST people wouldn't get the BRUTE/BRUCE part.....BRUTE meaning to crunch... BRUCE meaning to????

[@souloftheage]

I'm LISTENING but NOT compelled.....I know "BRUCE ALMIGHTY" was a movie with Jim Carey...but I did NOT see it and relatively few others did either. Now, if there was a name from CASABLANCA or CITIZEN CANE it might have some gravitas....but "BRUCE"......nahhh....but you ARE a creative person!!!.

[@sigalig]

This is a silly conversation

[@souloftheage]

+sigalig "silly"?.. this is the kind of stuff that MBAs study; ridiculous marketing ideas.

[@ConsciousAtoms]

I think this vid is a great example of how to popularize mathematics: start with a deceptively simple question about a game everyone knows, and then actually explain what research mathematicians do to get to the answer. I thoroughly enjoyed it. Keep up the good work!

[@astroknightsunited]

Google: run by benevolent nerds.

[@lydiamattar]

I am amazed that people can solve Rubik's cubes in only 20 moves! I wish I could do that! This video was very interesting to me!

[@SEBUVER]

Awesome video! I would love it if you guys went to the UK Open 2012 in Leicester in November; it would be a great place to get some footage of some very talented solvers.

[@nofanfelani6924]

20 is the god's number, the world record of solving rubik's cube efficiently is 23, who is that person who nearly entering the god's realm? is he an angel??

[@pogonoah99]

Actually, someone set a new world record for Fewest Moves: 19 moves.

[@anjaninator]

the difficulty of the cube also makes the moves reduced

[@shekelshlomostein4642]

Nofan Felani The lowest possible record in this competition is four moves although its quite unlikely that somebody will scramble it in such a way

[@DeathBringer769]

The 20 number is for the hardest scrambles possible. That's the most ANY cube will take. Of course there's plenty of combinations you can solve in less, even in competition with their minimum scrambling standard (as in they won't give you a cube that can be solved in 2 or 3 moves, lol. They have procedure for scrambling to make sure this doesn't happen. You'll still only need 20 moves max if you're in "God's realm" or potentially less if it's an easier scramble.)

[@ethancollinsworth3927]

Yeah

[@christopherli5828]

Haha 20 amino acids. A coincidence? I THINK NOT

[@drewc718]

There's 22 not 20

[@kenite7980]

+Drew C there's 20 , 12 here 8 there

[@christopherli5828]

lol 20 amino acids that are used by most organisms

[@osamanasser4657]

This is a meme now you know!

[@christopherglover4180]

There's no such thing as coincidence you call it that because you cannot comprehend the connection

[@lecterror]

Chess is a great idea, I'd also like to see a video-or-two about Go (圍棋 / weiqi)? That ought to be mind boggling..

[@bald_chicken]

Chuck Norris can solve a super flip in one move

[@hiimapop7755]

Without God's restrictions, he couldve already completed that 2000 years before he even existed, wiping out 123 omniverses on the way.

[@josephgaming8213]

Romaniususa dude that’s amazing it will always solve itself

[@sergey1519]

i can solve it in -20 turns

[@Fascade97]

4:06 The guy proves the existence of the force on the Rubik's cube.

[@happybuddyperson]

I've never been able to solve one, and I've had one for 15 years.

[@christopherli5828]

Not alone

[@evanwilkinson9380]

If you have a booklet that helps you that came with your Rubik's cube then it is quite easy. If you do it a few times with the booklet, you will probably then be able to do it solo

[@happybuddyperson]

I've lost both interest in rubix and the cube I owned.

[@colw321gaming2]

+happybuddyperson I can do it in 15 seconds noobs

[@Nicbaggins]

Solve it layer by layer. Not side by side.

[@Timikan]

"And Google, because it's run by benevolent nerds..." Most amazing thing I've ever heard. Ever.

[@richardblack1588]

I want to test my Hello World program on Google's super computer. Make it happen!

[@MoonLiteNite]

i bet if you pass this around enough, or get enough likes on facebook or some BS, some guy will let you do it....

[@blackystarss9319]

There's a sonny called" Hello "

[@KiwiPokerPlayer]

In context, this is one of the funniest comments I've seen on KZbin, which is not written by me, for a long time. Well done sir (or ma'am), well done indeed.

[@theflamingcube9217]

I discovered the superflip by just quite literally making moves to create patterns, and it's actually not that hard to solve back.

[@reasonandevidence]

@numberphile My college,IIT Bombay holds the current Guinness World Record for most people solving Rubik's cubes simultaneously.937 people successfully solved their cubes in the given time and I was lucky enough to be one of them.

[@AlqGo]

I thought someone would have come up with a complete analysis of Rubik's cube using some kind of abstract algebra; but, no, instead, exhaustive method was used to solve a problem regarding the cube.

[@puppergump4117]

To be fair most of our abstract algebra has centuries of research put into it. Computers are also the easiest way to find that algebra if it exists.

[@barrel34]

Oh, it makes sense now, of course it does... I don't even know why I got confused the first time. "it is the MINIMUM number of moves necessary to complete the most complicated "scramble" of the Rubik's cube" but it is "the MAXIMUM number of moves it takes to solve a Rubik's cube." Thank you stranger for clearing things up for me.

[@nikkirennardo5100]

I put a super flip cube in a cube solving app and it said there was something wrong with the cube

[@BrouwerEK]

If you do a quarter turn then again the same quarter turn of the same side, it counts as one half turn, since you made those moves one after another. Notice that those moves affect same way on a cube. It is so called hall turn metric, where each quarter or half turn is measured as one move.

[@Lucy-ng7cw]

I do superflip in 24 moves. How do you do20?

[@DisDatK9]

If you figure that out, then you will be considered the next Einstein.

[@fetchyryu]

Lucy Hunt slice turns count as two moves in common metric ;) ((M' U)x4 y' z')x3 or however it goes is really 36 turns Numberphile does have another video on the superflip with the optimal algorithm, though. It's definitely not as easy to memorize

[@pogonoah99]

U R2 F B R B2 R U2 L B2 R U' D' R2 F R' L B2 U2 F2 So I'm the next Einstein then? :P

[@fetchyryu]

Noah Fence all hail

[@mehmed6529]

DatK9 Unless if you memorize it

[@failurefiend]

A quarter turn and a half turn count as the same number of moves? Im glad numberphile proved that .25 = .5, its rather impressive! Maybe i can tell my old geometry teacher that the triangle wasnt reflected, it was merely rotated 90 degrees! Thanks!

[@oooohapenny4707]

What's the video called where that guy says the word tortoise weirdly, I can't find it

[@drewc718]

Zeno's paradox

[@oooohapenny4707]

+Drew C thanks 😀

[@stoneskull]

hahahahaha

[@xyz.ijk.]

He does say that weirdly, doesn't he. Tor-toyce. Maybe it's the Rolls-Royces of tor-toyces.

[@Jogie]

It is called FMC (Fewest Moves Challenge). It is an official WCA (World Cubing Assosciation) event, and the world record is currently 19 moves.

[@blazegaming7670]

If people figured out the enigma they can figure out this

[@MohdRashid-oc1sv]

ssss

[@kbmarco8324]

You're right, however there is one way you can do it. Search up "rubik's cube center dot" and it will show you how to do it. If you have a rubik's cube, you can do the moves "M, S, M', S' " and you will get the center dot pattern. If you don't know Rubik's Cube notations, search up Rubik's cube notations on google.

[@Threedog1963]

I solved my Rubik's cube in 2 moves. Move one, smash with hammer. Move 2 superglue it back together.

[@Nell404]

Threedog1963 superglue is love,superglue is life

[@quinn7894]

How can this comment have 8 likes? That's way too many.

[@Deedlit11]

If by "hardest" you mean requiring the most number of moves to solve, the superflip was proven to require 20 moves to solve. Later, it was proven by computer search that every position can be reached in 20 moves or less. So the superflip is tied for the most moves required to solve.

[@RonWolfHowl]

Any position reached in over 20 moves has not been reached in the most efficient way.

[@N1ito]

***** does that mean that when scrambelign a cube, doing 20 moves is the smartest?

[@kingofchase2539]

No not necessarily, I think

[@rewrose2838]

@@N1ito If you're using more than 20 to reach any state, you're not the smartest (that's what it means)

[@garyzhang4306]

You gotta love proof by exhaustion when submitting a 20 page long solution to a simple homework problem.

[@nikolaswithak]

Anyone else here a speedcuber?

[@radiostation6366]

Pb 11.91 average around 21 to 19. You?

[@andycohen3365]

Kind of a beginner. My record is 54.7 seconds and I'm learning new algorithms to shorten my time

[@nikolaswithak]

Just a tip, i wouldn't suggest going straight from beginner method to something like Fridrichs method right away (F2L, OLL, PLL). Because that is WAY to big of a skill level jump. Id suggest learning maybe 4 out of the 7 OLL algorithms and all the PLL algoirithms and skip F2L cause it can be confusing. So instead you do cross, corners, edges, OLL, PLL. Which is an easier transition from cross, corners, edges, cross, corners. Jumping straight to F2L, OLL, PLL is difficult.

[@radiostation6366]

edges and then* corners

[@mr.mister2640]

Me my pb is 9.98 but I average around 15 or 25 seconds

[@ZipplyZane]

What's particularly convincing about this is that some manuscripts said 616, which also works to get Nero's name, just in a slightly different spelling.

[@yuhangtan976]

What if 69 was god's number

[@CygnusSonolumen]

Two things I love rubik's cubes and the numberphile youtube account that I found out from Vsauce that of which I also love.

[@Covencraft]

You don't have to work it out, you use an algorythm

[@domenhitrec3288]

but if you are smarter you can find a shorter solution

[@d4m4s74]

That would be the exact same 20 move algorythm, since a superflip flips ALL edges, it would look just like a 3x3x3 with huge centers and edges.

[@gustavkrogsbygaard3254]

what are the odds of a blind people getting a rubik's cube right in x turns? i hope you'll make a video covering this.

[@oonmm]

Too many variables.

[@JustASnack]

Too many variables.

[@derekconwaygd]

Gustav Krog Søbygaard Too many variables

[@pyelias5238]

Gustav Krog Søbygaard Not enough variables

[@pumq1138]

+Gustav Krog Søbygaard Too many vegetables

[@MindLessWiz]

Brilliant playlist!!! Finally! Thank you it's been wonderful. :)

[@arisrayden]

i'm not really all that comfy with counting half turns as one single move

[@IMortage]

Me too. I wonder how the result would change if half turns counted as two moves.

[@lukejagg]

Not that much would change. You could still have solves where you don't have to do 2 consecutive moves.

[@emgunter5962]

It's referred to as HTM or half turn metric. God's number using QTM or Quarter Turn Metric is 26 moves.

[@johannesvahlkvist]

it's universally accepted in the community that they are 1 move, mostly because of how you write down moves. r meaning turning the right axis clockwise and r2 being turning the right twice

[@ffggddss]

Whether to count a half-turn as one move or two, is a question where a case can be made either way. Simliarly, a case could be made for counting a slice move (turning the central "slice," which is equivalent to turning opposite faces in parallel), or even an anti-slice move (turning opposite faces equal amounts in anti-parallel), as a single move, since these can be done in essentially one motion.

[@hobojo15467]

The world record for fewest moves is now 19. It's incredible

[@ZectonplaysMC]

I take 0 moves I peel the stickers off

[@aechxavior7706]

1. You ruin the cube peeling the stickers off, take it apart and reassemble if you really wanted to cheat. 2. it's illegal in the WCA to take a cube apart and "solve it"

[@dontreadmyprofilepicture931]

+Aech Xavior you ruined it

[@justahker3988]

Remove 48 stickers, put them back on = 96 moves.

[@ZectonplaysMC]

and for the record i average 15 seconds

[@MuzikBike]

hilarious and original

[@barrel34]

20 or fewer moves? I though minimum was twenty. Just making sure :) Really interesting videos guys, keep 'em coming! They're not only educational, but also motivational!

[@Eisgod]

0 is the minimum

[@anishgunisetty7906]

ask felix zemdegs

[@radiostation6366]

Feliks*

[@AA-100]

Even he cant solve it in 20 moves although he can solve it in under 5 sec

[@AnkhArcRod]

The video keeps showing folks doing speed cubing. However, the whole point of this is that the efficient cube solution is just plain awesome. The guy who proposed the 23 step solution for the rubik's cube must have been a genius of a different level!

[@rayvylai3967]

who is thinking about the world record of fmc (fewest move challenge). its 19 by the way

[@anticorncob6]

I made a video about that, actually it was about why (R U)*105 went back to the solved state, but you can apply the logic to R U' also.

[@TheFaintD]

The Record Is 20...

[@NoahS4226]

Marco Polo Herrera that's my avg In seconds lol

[@numberphile]

glad you liked it!

[@stonethemason9662]

when u get a new cube, couldnt you win in 2 moves by turning the cube once then back.. just saying lol

[@MintAvhnDaoeAdjd]

That's the difference between the smallest number of moves that any particular scramble can be solved in, which as you pointed out is of course 1, and the smallest number of moves in which it's possible to solve any scramble, which is the topic of the video. It's tricky to define this difference in English with so few words, which is why in maths we have symbols like 'forall' and 'exists', and why the order you write them in matters.

[@kirkula]

That charity event should be on skype (or similar), and everyone with a rubik's cube and a webcam should all get together online and solve their cubes!

[@chipblock2854]

I solved the first one I got in the early 80s in one move. I took a 5 pound hammer to it and smashed to tiny pieces. It took me awhile to clean up the mess. It sure made me feel better!

[@MiketehTV]

42 is the answer to the greatest question of Life, The Universe and EVERYTHING.

[@aceofspaids98]

The 20 move boundary figured out by finding the optimal solution for each 43 Quintilian solves with about 1 every second. Watch the video for more details.

[@astra1288]

The current World Record for fewest moves competition (FMC) is 16 moves, which was in fact the optimal moves needed to solve the cube in question. Only 1 in 473 cubes can ever even be completed in 16 moves.

[@ScrapperTBP]

You can't change the centre colour. Whatever the centre colour is, is the colour that side should be. The only way to change that is to physically remove each individual cube but even then I don't know if it is possible to remove the centre one.

[@ExplodingSoySauce]

It probably wouldn't look like much, because the slightest nudge would probably make it fall apart. The pieces wouldn't align, so it would be extremely difficult to make a single turn if it stayed together. A single twist could be considered to be a full scramble.

[@LinkinParkForever10]

Quote ''Stopping young kids from becoming homeless, which is think is fair enough'' Kids not becoming homeless? What is this madness!?!?! Yeah id say avoiding hypothermia by not sleeping in a ditch is a pretty fair enoug cause xD Awesome and intriguing video as always!

[@MrTheGremlin]

Love how god's number is a testament to humanity's brilliance.

[@numberphile]

I'm open to it!

[@servvo]

as am i!

[@anticorncob6]

On a Rubik's cube, there are eighteen different possible moves: you can turn six faces, and turn clockwise, counterclockwise, or a double turn. If you make fifteen turns, there are 18^15 = 6,746,640,616,477,458,432 different ways to do that which is less than the number of permutations of a standard Rubik's cube, which proves that God's number must be greater than fifteen.

[@TimofeiSopin-ov6dp]

Well he doesn't just look at it and writes down the solution, he can do any turns, he can rescramble cube as many times as he want, he can use any amount of cubes, etc.

[@willianlindsayturner]

Happy Birthday, Mr Cube 40 years today, what happens in two years time? 6*7? So long and thanks for all the twists.

[@MontoyaNomad]

Brady, are you going to cover the mass cube solving when it takes place?

[@colbybrown2870]

If you are a perfect Rubik's Cube solver (ie, some sort of God), then you would always be able to solve any puzzle in 20 or less moves. The fewest moves is one- if I turn one side and call it "scrambled", then all you have to do is move than side back. The most complex Rubik's Cube puzzle can always be solved in 20 moves.

[@GSPV33]

Pardon, you're right. I wasn't thinking at the moment. Perhaps a childhood memory of 'experiment 626 (Stitch)' overtook my mind! By the way, they are merely two separate translations of the numerals written for the number. It's not so much a matter of 'original number' as it is that they are two alternatives.

[@BrouwerEK]

Actual world record of fewest moves solve is 20. You can check it on World Cube Association website, rankings page.

[@EpicNixter]

There's a video on youtube that describes that for a 7x7x7, if you were to take one combination and make the size of an atom, it would take 10^90 universes full of atoms to show all the possible combinations.

[@DaithiDublin]

I made it into two numberphile videos in one day and now I must drink to my good fortune! I think I'm actually more excited by this than finally learning how to solve the cube after 30 years of frustration. Well, almost.. ;¬)

[@MeatGoggles]

The record for the Rubik's Cube done in fewest moves is now 20 moves! Done by Tomoaki Okayama in japan this year.

[@reuelckj]

Wow imagine being able to see the 20 or less moves quickly! That'll be amazing...

[@davisbaugh8747]

It is amazing how a rubics cube can be solved at 20 moves minimum! Can you give me advice or some strategies on how to solve a rubics cube?

[@musicsebastian888]

KimSyunHi, I haven't seen a pixies reference for a looooong time x)

[@cold_fruit]

Addendum: if you want to scramble a solved cube, doing more than god's number of moves to scramble it will actually start to reverse the scramble and re-solve the cube slightly, so in competitions they always scramble by exactly 20 moves.

[@ffggddss]

That doesn't follow. Making 20 random moves doesn't guarantee that they are "God's 20." In fact, it's almost impossible to hit the right 20 moves (or any of the relatively few 20-move combinations) that maximize the 'degree of scramble.' 20 random moves will almost never be a maximum scramble. So scrambling by 20 moves is almost certain to scramble the cube less thoroughly than, say, 25 or 30 moves.

[@henrywaldstreicher3367]

the guy at 6:16 is epic

[@thetravelinghermit]

you just blew my mind

[@oniuqasaile]

4:33 "... and Google, because it's run by benevolent nerds..." ... and I choke on my laugh!

[@spacevspitch4028]

1:42: considerable misunderstanding there. Speedcubers can't look at a cube and calculate what moves will solve the whole thing. They have a specific method which involves solving the cube with predetermined steps that they do EVERY time, no matter what the scramble is. Within the context of that method, the fastest speedcubers can work out the 1st step and some fraction of the 2nd during what's called "inspection". Inspection is 15 seconds of allotted time a competitor in a speedcubing competition has to observe a cube before starting the timer and solving it. Once inspection is up and they start the timer and begin solving, they have already worked out the first handful of moves and if they're focused enough, they can look ahead to the next moves WHILE doing the current ones. This way, they can maintain a nearly seamless flow from one step to the next until the cube is solved. Regarding the "fewest moves" event in cubing competitions ("FMC" as competitors tend to call it), competitors have a whole hour to work out the best solution they can for a given scramble. And even then, there are predetermined techniques and strategies that they use. I've never heard of nor seen anyone solving a rubik's cube with any degree of speed or efficiency intuitively from start to finish. There are always pre-memorized, well rehearsed sequences of moves ("algorithms") involved and specific techniques/strategies that have been worked out and mastered beforehand.

[@spacevspitch4028]

That's not to in ANY way take away from the achievements of world class speedcubers. It's definitely possible to get into a mindset of, "Oh, all you have to do is memorize a bunch of algorithms to be great." Also not true and a gross oversimplification! World class speedcubers don't just know hundreds of algorithms. They still have the ability to mentally work out those first dozen or so moves without making a single physical turn. Then, at each sub-step, there are countless ways to approach the next step. The ability to look ahead and decide in a fraction of a fraction of a second what the most efficient next step is is also essential. In fact, I'd say the better I get at solving the cube myself, the MORE impressed I am with top-level solvers. Because I have a direct experience of what it is they're doing and can see how challenging it is. Like, I know that they do this, this, and this, but DAYUM, HOW DO THEY DO IT SO FAST...and EFFICIENTLY?!

[@nahuelfantino]

i hate maths and this channe is one of the most interesting i have ever subscribed to.

[@computercube123]

the efficient solve competition is called fmc: fewest moves contest

[@NoOffenceTv]

this was very interesting and kinda mind blowing

[@covertCoder]

Using the Hebrew encoding/decoding scheme shown in the 666 video, you can effectively convert Nero Ceasar (in Hebrew) into the Hebrew version of 616. 666 corresponds to "Nerown Ceasar" which was how they knew Nero Ceasar back then as. For a better explanation as to why this is, see Numberphile's 666 video.

[@claradenken]

great work and plans with the schools, respect on that one!

[@Koroistro]

That face at 2:27 can become a meme! Someone do it please XD

[@zelaznog25]

the minimum number of moves from the position that requires the most moves, that is what is the shortest way to solve the hardest cube :P

[@FountainMath]

Just have to add that the comment at 1:55 about the fewest move is no longer 23, but actually atm is God's number. "World Cube Association - World Record Fewest Move" (Google that)

[@diamondisgood4u]

Interesting concept because if you can solve ANY combonation in 20 moves or less then you do say a move that makes it need 19 more till you solve the puzzle, then couldn't you say because it is a new type of puzzle that you solved it in 19 or 18 moves etc. -DIGY