## 4x4x4 cube: Notation

Here we sum up the essential you have to know about the 4x4x4 cube to understand the tutorials.

### Parts of the cube

Faces

They are the surfaces containing 16 stickers. There are 6 faces

Center pieces

They are the group of pieces whose colour determines the colour of the whole face. There are 6 centers, and each one contains 4 stickers.

Inner layers

They are called the same way than the faces but with lower case.

Edges

They are the pieces containing 2 stickers. There are 24 edge pieces.

Corners

They are the pieces containing 3 stickers. There are 8 corner pieces

### Turns of the outer layers

The blue arrow indicates clockwise direction. When we do this movement we write the letter of the layer.

Example: U

The yellow arrow indicates counterclockwise direction. When we do this movement we write the letter of the layer and an apostrophe.

Example: L'

Another important case is the double turn, we turn this layer twice.

Example: D2

### Turns of the inner layers

In the Case 1 we have the turn of the inner layer. It is the same case that outer layer; however we write the letter in lowercase.

Examples:

Clockwise direction: d

Counterclockwise direction: d'

Double turn (180º): d2

In Case 2 we have the turn of the inner and outer layers. We can turn together the inner and outer layers, with the letter of the outer and inner layers between parenthesis.

Examples:

Clockwise direction: (Dd)

Counterclockwise direction: (Dd)'

Double turn(180º): (Dd)2

### Rotations of the whole cube

The blue arrow indicates clockwise direction in the three axes. When the rotation is clockwise we write the letter of the axis.

Example: x

The yellow arrow indicates a counterclockwise direction. When the rotation is counterclockwise we write the letter of the axis and an apostrophe.

Example: y'

When the rotation is double we write the letter of the axis and 2 after that.

Example: z2