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Algorithms · A practical cube lesson

Algorithm Practice: L’ U’ L U

Learn the mirrored left-hand trigger.

Open 3D cube ↗

What you will learn

The left-hand counterpart uses L’ U’ L U. Watch how the left-front-upper region moves compared with the right-hand practice.

Before you begin

Set a clear front and upper face on your physical puzzle. If you are using the simulator, choose the appropriate cube size, then hold the same orientation before comparing moves. Review face-turn notation whenever a move symbol is unfamiliar.

01 · OBSERVE

Find the pieces or pattern

The left-hand counterpart uses L’ U’ L U. Watch how the left-front-upper region moves compared with the right-hand practice.

02 · PRACTISE

Try this short exercise

Alternate the right-hand and left-hand triggers on separate resets.

03 · VERIFY

Check your result

Stop after the exercise and compare your real cube with the interactive 3D cube. Check neighboring face colors, not just the face closest to you. If the outcome differs, repeat slowly from a known position.

Common mistake to avoid

Use a stable viewpoint when deciding whether the mirror looks correct.

Take the skill into your next solve

Apply this lesson during one deliberate practice solve. Describe what you see before moving, make only the move you intended, and check the result. Confidence with piece recognition and reliable turns matters more than repeating a long sequence quickly.

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