T O P
sadomaru

I wonder how many cubes had to be blown up to bring us this machine


IppeZiepe

The first prototypes took off the colored stickers and pasted them on the right squares.


Ninja_Spi-D-er

Lmao 🤣


ColdJackle

Official death count is at least "several", according to the engineers


LightRefrac

What algorithm are they using to solve it? Doesn't look like the friedrich method or any other traditional methods


scheisse_grubs

I think it’s just poorly scrambled. Might just be a video they took in testing. You can see that there’s a lot of colours still touching that are supposed to to be touching at the start of the video. For example the middle and right cubes from the top row of the front face are clearly supposed to be next to each other, so putting them in the right place wouldn’t be too difficult to do.


Mheide3

No, a 3x3 can always be solved in 20 steps or fewer. This took 20 steps


scheisse_grubs

Oh ok didn’t know that, cool!


jabber_

That's not how it works. There are only 20 pieces in a 3x3 so having a scramble where *nothing* is correct is actually kind of difficult. Having a few pieces already adjacent to each other doesn't make the solve any easier. They're going to get moved around during the solve so it won't matter, especially to a computer generated solve. The cube in the video is plenty scrambled. Also, there are really only two pieces we can see that are already matching. The blue-red edge and the blue-red-yellow corner. The red and green you see in the back right corner are indeterminable because we don't know what the other colors on those pieces are.


scheisse_grubs

There’s also 3 sides we can’t see. I’m not saying nothing has to be correct, I’m saying that it’s likely poorly scrambled. It was solved in 20/21 moves. Now I don’t have eyes well enough to see how many moves master Rubik’s cube solvers take to solve them but I’d be a little suspicious if it took them 20.


jabber_

We can see the other sides in the slow motion. Every scramble can be solved in 20 moves or less. This is called [God's Number](https://ruwix.com/the-rubiks-cube/gods-number/). A computer can very easily find a solution of 20 moves or fewer to every single scramble. It's a computer generated solve and has nothing to do with how a human would solve it. Also, speed solvers don't worry so much about move counts, but there is a category for fewest moves. [Here](https://www.worldcubeassociation.org/results/rankings/333fm/single) is a list of top results.


LightRefrac

Yeah it took a surprisingly small amount of steps


DankidyDan2521

3x3 Rubik's cubes are never more than 20 moves from being solved.


LightRefrac

What algorithm solves it in less than 20 steps? I'm aware it's a computer and can have foresight about future moves but I really wanna know how it works


ColdJackle

Credit goes to Ben Katz and Jared Di Carlo. The Hardware and Software Details feature more videos. And yes, there's also a [Cubesplosion](https://youtu.be/hURpaTfJqQk). [YouTube Original](https://www.youtube.com/watch?v=nt00QzKuNVY&ab_channel=BenKatz) [Hardware Details](https://build-its-inprogress.blogspot.com/2018/03/the-rubiks-contraption.html) [Software Details](http://cactus-zone.blogspot.com/2018/03/rubiks-solver-software.html)


Lohdown

In the 90s, I was at an automation fair. There were two robot arms with a machine vision camera in a cell. There was a small conveyor belt leading outside the cell with a Rubik’s Cube at the end of it. Anyone could walk up and scramble the Rubik’s Cube, put it back on the conveyor and send it back into the cell. The robot arms would pick it up and show all six sides to the vision camera. A numeric display would light up telling you how many moves it would take to solve it. The two robot arms would then turn the cube with the countdown decrementing with each turn. When the counter reached zero, the robot would set a completely solved cube back on the conveyor sending it out to be scrambled again. It was one of the most impressive things I have ever seen.


lllNico

to this day, i have not figured out how the corner pieces work on a rubiks cube. My brain does not want to understand.


goosoe

algorithms bbabey


lllNico

i mean, physically, how can they be stuck to the cube but move all over the place


goosoe

oh they do sometimes break off haha


Vanilla_Tom

The irony is attempting this on a Rubik branded cube will likely make it explode.


SaltyLemonsz

Imagine experiencing life at that rate


Fafoah

Now build the mechanism inside the cube so i can have decorations of Rubik’s cubes solving and unsolving themselves


sirsarcasm1993

The six arm contacting cube have fixed color underneath. So the middle color on each plane never changes which looks like a drawback. You might have to start with centre color on each six sides to be unique. Still looks cool though. Edit1: grammar Edit 2: ignore this as i am stupid. Someone replied the explanation


KaleidoscopeOk9061

The centre pieces of a 3x3 Rubik's cube are attached to a core, they never move relative to one another.


sirsarcasm1993

Fuck you are right and i am stupid


KaleidoscopeOk9061

Don't be too hard on yourself! It's a common misconception among people who aren't into cubing that all the faces can move independently, rather than seeing the cube as made up of discrete pieces.


MassGaydiation

This is the baddy in the next hellraiser film


Maki1411

Are the 6 metallic sites fixed on the cube? It kind of seems like they don’t move while the rest of the cube gets twisted around to get solved


ColdJackle

It's hard to see on mobile, but the metallic plates are just extensions of the arms and rest on the regular center plastic knob. The cube is very lightweight and specifically built for this machine, but it works just like a real one. It is only made a lot less stable to be less dangerous in case the hardware or software produces an error (see Cubesplosion).