Understanding and Solving the Rubik's Cube Without Algorithms
Rotations of a layer have different effects depending on whether the layers are parallel or perpendicular. When a layer is rotated, it does not affect the arrangement of parallel layers, but it does affect all perpendicular layers.
For example, in Figure 3.18, the rotation of the U layer does not affect the parallel layers E and D. Similarly, in Figure 3.19, the rotation of the D layer does not affect the parallel layers U and E. You can observe this by clicking play (â–·).
However, in Figure 3.20, the rotation of the U layer affects the perpendicular layer R, as well as all the other perpendicular layers. The rotation of a layer propagates through all layers perpendicular to it. Again, you can click play (â–·) to see this in action.
Key Knowledge: Rotating a layer does not affect parallel layers, but it does affect all perpendicular layers.
Understanding the relationship between parallel and perpendicular layers is important when planning moves. It allows you to manipulate specific parts of the cube without disturbing other layers that are not directly affected by the rotation.
App source: animcubejs.cubing.net/animcubejs.html