In the context of Rubik's Cube notation, "r" represents a clockwise 90-degree turn of the right face.
Here's how it works:
- r: Turn the right face clockwise.
- r': Turn the right face counterclockwise.
- r2: Turn the right face 180 degrees.
This notation is commonly used to describe and execute algorithms for solving the Rubik's Cube.
Example:
The algorithm "r U r' U'" involves the following steps:
- r: Turn the right face clockwise.
- U: Turn the top face clockwise.
- r': Turn the right face counterclockwise.
- U': Turn the top face counterclockwise.
This algorithm will manipulate the cube in a specific way, often used as part of a larger solution strategy.