In cubing, "notation" refers to the system of symbols and letters used to describe moves on a cube. It allows cubers to follow along with "algorithms" (a sequence of moves that are required for switching specific pieces on a cube). Here’s an overview of the basic 2x2 notation:
F
R
U
B
L
D
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Each letter represents the face of the cube that should be turned.
A letter by itself means a 90-degree clockwise turn of that face.
A letter with an apostrophe (e.g., R') means a 90-degree counterclockwise turn.
A letter followed by the number 2 (e.g., R2) means a 180-degree turn in either direction.
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