EG2: Fish

What EG2 is

EG2 is like EG1, except the bottom layer has two diagonal corners swapped. No side has a matching pair on its bottom row.

The bottom layer can sit any way, so there is no D turn before the algorithm. The two yellow top cases are in Permute both layers (PBL).

Goal

The white face on the bottom is done and the bottom layer has two diagonal corners swapped (EG2). The top is the Fish shape. One algorithm solves the whole cube.

How to recognize it

First look at the bottom row of the four sides. EG2 has no side with a matching pair. Exactly one side means EG1; all four mean CLL.

Then look at the top row of the four sides, as in CLL: Fish. Each case has the same top layer as the CLL case with the same number. Words used here:

• Front sticker (or left, right, back): the non-yellow top sticker on that side. On a side with two non-yellow stickers, call them front and rear (or left and right).
• Matching pair: a side's two top stickers have the same color.
• Opposite colors: red and orange, green and blue. Two different colors that are not opposite are neighboring colors.

Put the yellow corner at the front left. Compare the front sticker with the right sticker, the back sticker and the left side's rear sticker. One always matches and one is always opposite.

How to hold the cube

White on the bottom. Hold the top like the CLL lesson with the same shape, shown under the controls. The bottom layer can sit any way.

The player adds a U at the start or end when needed. After the algorithm, one U or D turn may be left.

The main idea

Fish 1 opens with R U R' U R U2, like the familiar Fish algorithm. Fish 3 is the shortest here, just 8 moves.

Next lesson

Go to EG2: Reverse fish.