4 × 4 · STEP 3 / 7

The four side centres

Finish the four side centres in order: yellow on top and green in front puts red left, orange right.

  1. You start with (input)The yellow centre
  2. Result you will get after finishing this stepThe four side centres

How to do it

  1. Keep yellow on top, white at the bottom for the whole step. Four sides are left: green, blue, red, orange. The formulas only move centre pieces between two sides, never the top or bottom.
  2. Green on the front. Find a green piece on the right, left or back. Turn that face (, or ) to put it where the picture shows, turn until a not-yet-green spot of the front sits as pictured, then follow the picture.
  3. Blue opposite green. Turn the whole cube (y2) to bring the face opposite green to the front and build blue the same way. Blue can only be on the right or left now.
  4. Red and orange. With yellow on top and green in front, red is left, orange right. Turn the whole cube so green is on the right: the front is the red face. Red can only be at the back now: use the last picture. Red done means orange is done too.

One pair of faces at a time

  1. 1/3
  2. 2/3
  3. 3/3

This step: look only for

Piece
Centre pieces
Colours
Green, then blue, then red (orange finishes itself)
Where
The 4 sides
How many
4 of each colour, one at a time

Leave every other piece alone for now: the pictures show them in grey. Found one? Compare it with the cases below.

Which case do you have?

Before you compare and all through the formula: keep the front (the face marked FACING YOU in the pictures) turned towards you. A picture marked BACK, AWAY FROM YOU looks from behind: do not turn the cube, just tilt it to see the back.

1. On the right or left face

2. On the back face

2U′R′2U
  • All six centres done? Go to step 4, the edges.
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