Rubik's Cube Notation


Uploaded by jeaysm on 05.12.2006

Transcript:
Hi, OK, I am going to talk about the notation for the Rubik's Cube in this video.
There's 6 sides to the cube, obviously, and they all have different names
represented by letters, so we've got U, for Upper, D for Down
F for Front, B for Back
R for Right, L for Left.
These notations, these letters only represent the existing position of the cube
so they don't refer to the color, in general, for the whole solution.
so, for example, White is U right now
but if I turn the cube upside down White would be D, so it would be Down.
For each side you can do 3 different moves,
There's just simply the name of the face itself, U,
so that would be a quarter-turn clockwise, a quarter-turn clockwise is U
or if I did, say, F, that would be if I just did that. That'd just be F.
Or R. That's R.
You can do U-squared, which means a half-turn, so 1, 2. It's a half-turn.
And you can do U-prime, which is a quarter-turn counter-clockwise.
So, like that. That would be U-prime.
So let's just do a couple of simple moves.
Let's say I had to do R. That would be like that.
Let's say I had to do D-squared, that would be a half-rotation of D, so that would be D-squared.
One thing to note about the clockwise and counter-clockwise terminology
is that it's always with reference to looking directly at the face of the cube.
So if I'm talking about F, meaning to move the F face a quarter rotation clockwise
it would be looking directly at it, clockwise, like that.
If you're talking about B, it's not like this, even though that's in the same physical direction
i.e. like this way
It's always looking at B.
So I look at B for a minute here and I do a clockwise quarter-turn so it would be like that.
And as seen from straight on, this being U, this being F, this being R.
That would be B. OK?
So that's basically all there is to know
I guess one sort of non-obvious thing for beginners, is that
the center pieces are all fixed with relation to one another.
No amount of moves will ever change the fact that white is here, relative to green and red and so forth.
If you take apart the cube you'll figure this out in very short order.
There's a piece connecting all 6 center pieces
and it's pretty clear from looking at that they they could never move about.
So, there you go, that's the notation for the Rubik's Cube.
so if you want to learn a solution you'll definitely need to know the notation in order to proceed.
So that's the end of this video, and I'll hopefully see you on another video.