Step 4 of 6
Yellow face
Make the whole top face yellow by orienting the four corners, without breaking the yellow cross or the first two layers. Seven cases, one algorithm each: they are OLL 21 to 27 of the full method, and you will keep them as they are. Look at where the yellow of each corner is, on top and on the sides, and find the matching case by turning U.
The basic situations
Hold the cube as the hint says, then apply the formula. In the app, every formula is animated on a virtual cube.
OLL 27 · Sune
Turn U until the yellow on the sides matches the picture (each face seen from its front) — front: right; right: right; back: right.
R U R' U R U2 R'→ piece in placeOLL 26 · Antisune
Turn U until the yellow on the sides matches the picture (each face seen from its front) — front: left; right: left; left: left.
R U2 R' U' R U' R'→ piece in placeOLL 21 · H
Turn U until the yellow on the sides matches the picture (each face seen from its front) — front: left and right; back: left and right.
R U2 R' U' R U R' U' R U' R'→ piece in placeOLL 22 · Pi
Turn U until the yellow on the sides matches the picture (each face seen from its front) — front: right; back: left; left: left and right.
R U2 R2 U' R2 U' R2 U2 R→ piece in placeOLL 23 · Headlights
Turn U until the yellow on the sides matches the picture (each face seen from its front) — back: left and right.
R2 D' R U2 R' D R U2 R→ piece in placeOLL 24 · Chameleon
Turn U until the yellow on the sides matches the picture (each face seen from its front) — front: left; back: right.
r U R' U' r' F R F'→ piece in placeOLL 25 · Bowtie
Turn U until the yellow on the sides matches the picture (each face seen from its front) — front: right; left: left.
F' r U R' U' r' F R→ piece in place