Step 17/25 · CFOP

OLL: lines (I shapes)

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Four shapes with a yellow line through the center and no yellow corners.

Goal

Make the whole top yellow when only a line through the center is yellow.

How to recognize it

A yellow line through the center, with no corner facing up. Check the sides: which have two yellow corners, and which have a full yellow row.

How to hold the cube

White face on the bottom, first two layers done. Each shape's grip is shown under the controls. Turn U to line the shape up.

The main idea

OLL 51 is Fw, then R U R' U' twice, then Fw', like OLL 48 but with Fw.

Check before moving on

The whole top is yellow, and the first two layers are still done.

Next lesson

Go to OLL: no yellow edges (dots).

Step 1 / 10

Fw: 2 Front layers: turn 90° clockwise (seen from the front)

A horizontal line, no yellow corners. The left side has two yellow corners.

Hold the line left to right, with the two yellow corners on the left side.

Step 1 of 10: Fw. 2 Front layers: turn 90° clockwise (seen from the front)