Six solved centre blocks and twelve fully matched edge groups.
White centre down, yellow up. Treat every centre block and edge group as one large piece.
1. Read the cube as a 3×3
A whole centre block acts like one centre. A complete two-piece edge group acts like one edge. The actual corner pieces already behave like 3×3 corners.
From now on, use only outer R, U, F, L, D and B turns for the ordinary solving steps. R turns only the outer layer. Using Rw in its place breaks the reduction.
2. Follow the same checkpoints
| Order | Target | Instructions |
|---|---|---|
| 1 | White edge groups aligned with centres | Daisy, then white cross |
| 2 | White corners are in place and the bottom row on each side matches its centre | First layer |
| 3 | Middle edge groups match their centres | Middle edges |
| 4 | Four edge groups have yellow facing up | Yellow cross |
| 5 | The top corners have yellow facing up | Yellow corners |
| 6 | Top corners match the side centres | Corner positions |
| 7 | Remaining edges complete every side | Final edges |
Keep your physical 4×4 in its current state when you open a linked lesson. The diagrams show smaller pieces, but the outer turns work in the same way. If you’ve already met a stage’s checkpoint, skip that stage.
3. Recognise when to use a different approach
If exactly one or three edge groups have yellow facing up after you solve the first two layers, follow the next lesson on OLL parity, then return to the yellow-cross check. If all the corners are in place but exactly two complete edge groups need to swap positions, follow the PLL parity lesson, then resume positioning the last-layer pieces. Either case can occur even if you completed the earlier stages correctly.
4. Keep your grouped pieces intact
After an algorithm, every centre must still be a solid block and each edge still a complete group. A single outer turn cannot split a matched group. If the grouping has broken, check whether an inner or wide move slipped into your 3×3 sequence.
The player below reviews the final three-edge cycle. Watch each grouped edge move as one unit. It is one stage of the reduced solve, not a sequence to apply to every reduced scramble.
Need a reminder of the move notation?
R right · L left · U top · D bottom · F front · B back. A letter on its own means a 90° clockwise turn as you look directly at that face. An apostrophe (′) reverses the direction. A 2 means a 180° turn. Keep the same face at the front throughout the algorithm.
Rw turns the rightmost two layers together. 2R turns only the second layer from the right. 3Rw turns three layers. x rotates the whole cube like R, so the old front becomes the new top.
Watch, then try
Work through an example
Start by stepping through one move at a time. This prepared example shows a specific action. Use the lesson’s setup instructions to recognise when to use it on your own scramble.
Watch one worked example
The edge cycle uses outer turns to move each 4×4 edge group as a unit. The back group and all corners stay fixed while the other three top groups cycle.
Example grip: Start with yellow on top, blue at the front and red on the right. Follow any written instructions for rotating the whole cube.
0 / 11
Loading 3D cube…
Prepared position · 0 / 11 moves
Use Next move to follow the sequence.
Drag to inspect other faces. Use the arrow keys to rotate the view when the cube has keyboard focus.
Copy this exact example on your own cube
Start with a solved 4×4, with yellow up and blue at the front. Apply the setup below from left to right to create the example’s starting position. Keep this example separate from the scramble you’re solving throughout the course.
R2 U R U R' U' R' U' R' U R'Then follow the lesson sequence. If your cube has a different colour scheme, use the relationships between your own colours to identify the equivalent pieces.
Compare the starting position and the result
Drag each cube to inspect its other faces.
Explain it to yourself
Check your understanding
Now use your own cube
Your turn
Follow the linked 3×3 stages in order using only outer turns. Check that centres and paired edges remain intact after each complete algorithm.
Open a 4×4 Digital Cube for practiceOpens in a new tab so you can keep this lesson open while you practise. Check for yourself whether you’ve met the lesson goal. The Digital Cube doesn’t assess your result.
If you get stuck
An edge group splits during a 3×3 algorithm.
Check that every ordinary face turn moved only the outer layer. If you can identify an accidental wide or inner turn, undo it. Otherwise, restore the reduction before continuing.
Before moving on
Check your result
Your cube at this stage
All six faces solved
Every face is one colour. Check the back and bottom as well as the faces you can see here.
Confirm these on your cube. Watching the animation alone does not complete the lesson.
Tick each item once you can do it yourself.