Rubik's Cube: fundamental techniques

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A commutator is a sequence of the form X.Y.X^-1.Y^-1. The idea is that X.Y does half of what you want, but also has side-effects. Then X^-1.Y^-1 does the other half of what you want, and also undoes those side-effects.

• Corner 3-cycles
• Pair 3-cycles
• Edge 3-cycles
• Corner twists

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