Double Sune
OLL 21A bare yellow cross with a loose corner sticker at each end of the front face and each end of the back face. Nothing at all shows on the left or the right.
57 cases
All 57 cases, each turning the top face yellow in one algorithm.
OLL makes the whole top face one colour in a single algorithm, ignoring where the pieces end up. The 57 cases sound daunting; they are not learnt in one go. Most people pick them up in groups that share a shape or a trigger, and the awkward ones — the dots — come last because they are also the rarest.
A bare yellow cross with a loose corner sticker at each end of the front face and each end of the back face. Nothing at all shows on the left or the right.
A bare cross with two yellow corner stickers sitting together on one side face — the left as drawn — and a single sticker at the far end of both the front and the back.
The cross plus both back corners, so the top shows a solid bar of three across the back. The front face carries a matching pair of yellow stickers — the headlights.
A fat bar down the right of the top face — the cross plus both right-hand corners. One lone yellow sticker sits at the left end of the back row and another at the left end of the front row.
The cross with two diagonally opposite corners already yellow. The two twisted corners show one sticker on the left face and one at the right-hand end of the front row, pointing away from each other.
The cross with exactly one corner already yellow. As drawn the finished corner is at the back right, and the other three show their yellow on the left face, at the left end of the front, and at the front end of the right face.
The cross with exactly one corner already yellow. As drawn the finished corner is at the front left, and the other three show yellow on the back face, on the right face and on the front face in turn.
A sideways T: the whole right-hand column of the top face plus the middle row reaching across to the left. The back and the front each show two yellow stickers running from the left corner to the middle.
The same sideways T as OLL 33, but the two loose corner stickers both face left, one at each end of the left face, instead of splitting between the front and the back.
A 2×2 block of yellow filling one corner of the top face — the front right as drawn — with the loose stickers wrapping round the left face and along the back. The front face stays bare.
The mirror of OLL 5: a 2×2 block of yellow, drawn here at the back right, with the loose stickers running down the left face and along the front.
A C opening towards the back: the middle row of the top face plus both front corners. Single yellow stickers sit at the back end of the left and right faces.
A C opening to the right: both left-hand corners with the front and back edges, but not the left edge. The whole right face shows yellow, three stickers in a column.
A staircase of yellow running from the back-left corner across to the front-right: corner, edge, centre, edge, corner. The left face shows two stickers and the back one.
The mirror staircase: yellow runs from the back-right corner down to the front-left. The right face shows two stickers and the back one.
Every corner is already yellow. Two adjacent edges are flipped — the right and the front as drawn — so seven of the nine top stickers show yellow, with a notch either side of the front-right corner.
All four corners done and a bar of three across the middle of the top: only the front and back edges are flipped.
A P lying on its side: the right-hand column of the top face plus the centre and the back edge. The front shows two yellow stickers at its left end.
The mirror of OLL 31: the right-hand column of the top face with the centre and the front edge, and two yellow stickers on the back at its left end.
The left-hand column of the top face plus the front edge — a P facing left. The whole right face shows yellow.
The right-hand column of the top face plus the front edge — a P facing right. The whole left face shows yellow.
A bare line of three across the middle of the top face, no corners at all. The left face carries a sticker at each end and the front and back each show a pair at their right.
A bare line running front to back. The right face shows a full column of yellow while the left shows only its middle sticker.
A bare line front to back with the left and right faces each showing a full column of yellow, and nothing at all on the front or the back.
A bare line left to right, with a yellow corner sticker at each end of the left face and each end of the right face.
A kite: the back and left edges with the centre, and a lone corner diagonally across at the front right.
The mirror kite: the left and front edges with the centre, and the lone corner at the back right.
A fish pointing at the front-right corner: that corner with the two edges beside it and the centre, plus a lone corner away at the back left.
A fish pointing at the back-left corner: that corner with the two edges beside it, and a lone corner at the front right. The right face shows two stickers.
A bar across the middle of the top face with one extra corner hanging off it at the front left — a knight's move away from the far end of the bar.
The same middle bar as OLL 13, with the extra corner at the front right instead.
The middle bar with its extra corner at the back left. The back face shows only its middle sticker, which is what separates it from OLL 13.
The middle bar with its extra corner at the back right.
An awkward scatter with no clean shape to it: the back and left edges, the back-right corner and the front-right corner.
The mirror awkward case: the back and left edges plus both front corners.
The back edge, the left edge and both front corners on top. The same top-face shape as OLL 30, but here the two loose corner stickers sit at either end of the back face.
Both back corners with the left and front edges. The two loose corner stickers sit at either end of the front face.
No corners at all: the back and right edges with the centre, making an L. The front face shows two yellow stickers at its left end.
The mirror L: the back and left edges with the centre, and two yellow stickers on the front at its right end.
The same L as OLL 47 — the back and right edges with the centre — but here the whole left face shows yellow and the right face is bare.
An L made of the right and front edges with the centre, the whole left face showing yellow and the right face bare.
The right and front edges with the centre. The left face is a full column of yellow and the right face shows a sticker at each end.
The back and right edges with the centre, the left face a full column of yellow and the right face a sticker at each end.
A lightning bolt: the back and left edges with the centre, and the front-left corner hanging off the end.
The mirror bolt: the left and front edges with the centre and the back-left corner.
A bolt running from the back-right corner along the back edge, through the centre and out to the left edge.
The mirror bolt: from the back-left corner along the back edge, through the centre and out to the right edge.
A big lightning bolt: the whole middle row of the top face with one corner at each end, going opposite ways — back right and front left.
The mirror big bolt: the middle row with the back-left and front-right corners.
A bare dot with a full column of yellow down both the left and the right faces. The front and back each show only their middle sticker.
A dot with a full column of yellow down the left face only. The back and the front each show a pair of stickers at their right-hand ends.
A dot with exactly one corner already yellow — the front right as drawn. The back face carries a pair of stickers at its left end while the front shows only its middle one.
The mirror of OLL 3: a dot with a single finished corner, at the back right as drawn. Here it is the front face that carries the pair at its left end, with only a middle sticker on the back.
A dot with two diagonally opposite corners already yellow, and nothing else on the top face.
A dot with the two back corners already yellow and a solid bar of three yellow stickers right across the front face.
A dot with the two back corners done, like OLL 18, but here the loose stickers split between the left and right faces instead of forming a bar on the front.
The checkerboard: all four corners already yellow and all four edges flipped, so the top face alternates. Every side face shows a single sticker in its middle.