Getting started with the cube

A 3×3 cube looks like 27 little blocks stacked together, but the one in the dead centre is permanently hidden — you never see it and you never touch it. In fact, there isn’t even a block there; just the hub of the rotation mechanism. Only the outer 26 pieces actually move, and those 26 are the entire vocabulary of the puzzle. Before learning to solve a cube, it pays to learn how the 26 are carved up.

Three kinds of cubie

The 26 outer pieces are collectively called cubies. They split cleanly into three families, sorted by how many coloured stickers each one shows on the outside.

8 corner cubies sit at the eight corners of the cube. Each one belongs to three faces at once, so each corner exposes three stickers. A corner is uniquely identified by the trio of colours it carries: there is only one piece in the puzzle that shows white, red and green together, for example.

12 edge cubies sit along the twelve edges where two faces meet. Each one belongs to two faces, so each edge exposes two stickers. Similarly, an edge is identified by its pair of colours, and only one edge in the cube wears any given pair.

6 centre cubies sit in the middle of each face. Each one belongs to a single face and exposes one sticker — these are the simplest pieces and, as the next section explains, also the most important.

8 + 12 + 6 = 26, and together with the invisible core mechanism, that is every moving part on the cube. The state of each cubie tracks two things at once: which slot it sits in, and which way around it is facing. Corners have three possible orientations, edges have two, and multiplying out all the position permutations against all the orientation permutations — minus a handful of configurations the mechanism physically cannot reach — lands you at roughly 4.3×10¹⁹ legal states. For the maths behind that number, and why any one of those states can be solved in 20 moves or fewer, see the cube’s history.

Above is a fully solved cube. Drag it around with the mouse or your finger and count: eight corners showing three colours each, twelve edges showing two, and one single-colour centre in the middle of each face. Try to point at one of each. Once you can spot the three families at a glance — corner, edge, centre — every later instruction has a shared vocabulary to land in. Most beginner confusion ends up being one of these three pieces mistaken for another, so the time spent looking now pays back later.

Why the centres don’t move

Inside the cube is a three-axis mechanism. Three rotation axes run mutually perpendicular through the geometric centre of the puzzle, and at the end of each axis there is a centre cubie clipped onto its tip. The six centre cubies can spin in place around their own axis, but they cannot swap positions with each other — the geometry simply does not allow it. No matter how wildly you scramble the cube, the six centres always sit relative to each other in exactly the same arrangement they came out of the box in.

This unassuming fact has two consequences that every solver eventually internalises.

Consequence one: on a scrambled cube, the identity of the “green face” is decided by the centre, not by the eight stickers around it. If the centre is green, that face is green when you’re done, no matter what mess of colours surrounds it right now. The first thing to do when you pick up a scrambled cube is locate the centres and let them tell you what each face will eventually become.

Consequence two: the goal of solving a cube is really “align the other 20 movable cubies with the colours the centres have already named.” The centres do the labelling for free, and the eight corners and twelve edges each have to find their way back to their assigned slots in the correct orientation. Every solving method you’ll ever meet — beginner LBL, CFOP, Roux, ZZ — is just a different route through that same problem.

Move notation

The notation defined by the World Cube Association (WCA) is the lingua franca of tutorials, competitions and algorithm sheets everywhere. Each of the six outer faces gets a single letter: U (Up), D (Down), L (Left), R (Right), F (Front), B (Back).

A bare letter means: look directly at that face, then rotate it 90° clockwise. So R means “face the right side, turn it clockwise by a quarter.” To write other turns, decorate the letter:

• Add a prime ' = the same face, 90° counter-clockwise
• Add a 2 = the same face, 180° (clockwise and counter-clockwise give the same result)

Algorithms are written as a string of these tokens separated by spaces, executed left to right. A handful of worked examples:

• R = right face, 90° clockwise
• R' = right face, 90° counter-clockwise
• R2 = right face, 180°
• U F R' = three moves in sequence: up clockwise, front clockwise, right counter-clockwise

When you read an algorithm, sound the letters out one at a time and turn as you go. A handful of repetitions and the notation feels native. One detail worth pinning down early: clockwise and counter-clockwise are always judged from the perspective of someone looking directly at that face. So L appears to rotate “upward” from your normal viewing angle, because when you imagine yourself staring at the left face, that face’s clockwise direction happens to point up from the front view. Turning the wrong way around is the single most common beginner mistake; a one-second pause to ask “am I really facing this side?” fixes most of them.

Two side notes for later: advanced solvers also use x, y and z for rotations of the whole cube (a wrist flip that doesn’t change the internal state), and lower-case letters like r or a trailing w for wide turns that carry the middle slice along. Both notations come up in OLL and PLL. Neither is needed until you’re past the beginner method.

How to hold the cube

The Layer-by-Layer method holds the cube white on the bottom, yellow on top from start to finish. The solve builds upward — the first step is a white cross on the bottom layer; the last three steps all happen on the yellow top layer. You rotate the cube constantly to bring different positions to your hands, but the white-down / yellow-up anchor never changes.

Which colour faces you isn’t fixed by the method, but the speedcubing community has settled on green facing you as the default starting orientation. It comes from the BOY colour scheme (blue-orange-yellow): with yellow on top and green at the front, red ends up on the left and orange on the right. Speedcubing videos, online simulators, and most cube tutorials use this orientation so that the standard rotation notation (U/R/F/D/L/B) maps to a predictable set of colours.

F1 Cube follows the same convention. The camera scan prompts ask you to position the cube with yellow on top and green facing you so the six faces have a known anchor; the scrambler and the 3D animation assume the same starting view. Once you’re mid-solve the front colour stops mattering — algorithms naturally rotate the cube as you apply them, and the on-screen 3D model rotates with you.

Next

That is enough vocabulary — cubie families, fixed centres, WCA notation — to start operating the cube with intent. Go back to the home page and either generate a random scramble or scan the cube on your desk. Try four rounds of R U R' U' in a row and watch which cubies move, which sit still, and what happens after the sixth repetition. When you’re ready for the maths and the story behind this puzzle, read on at the cube’s history.