Definition:Singmaster Notation
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Definition
Singmaster notation is a technique for denoting the moves that can be made on a Rubik's cube.
Let the cube be facing the user with the $U$ and $D$ faces horizontal and the $F$ face towards the user.
In the following, clockwise denotes rotation of a layer of the cube in the direction of the clock as though that face were towards the user.
- $U$: turns the up face one quarter turn clockwise.
- $D$: turns the down face one quarter turn clockwise.
- $L$: turns the left face one quarter turn clockwise.
- $R$: turns the right face one quarter turn clockwise.
- $F$: turns the front face one quarter turn clockwise.
- $B$: turns the back face one quarter turn clockwise.
Appending a $'$ symbol to one of the letters denotes a turn of that layer one quarter turn anticlockwise.
Appending a $2$ to one of the letters denotes a half turn of that layer.
Also denoted as
Some sources use $X^{-1}$ instead of $X'$.
Some sources use $X^2$ instead of $X2$.
Source of Name
This entry was named for David Breyer Singmaster.
Sources
- 2008: David Joyner: Adventures in Group Theory (2nd ed.) ... (previous) ... (next): Chapter $1$: Elementary, my dear Watson: $\S 1.2$: Elements, my dear Watson