Edge orientation (LSE 4a)
Orient the last six edges: 9 cases.
All 6
R U' r' U' M' U r U r'
10 HTM · 4 algs
2 Top 2 Bot
M' U2 M' U2 M U M'
11 HTM · 4 algs
Bottom 2
M' U' M' U M U' M'
11 HTM · 4 algs
Top 2 Front 2
M' U' M'
5 HTM · 4 algs
4 Top
M' U2 M' U2 M' U' M'
11 HTM · 4 algs
2 Top Opp
M' U' M U M' U' M'
11 HTM · 4 algs
2 Top Adj
M' U M' U2 M' U' M'
11 HTM · 4 algs
1 Top 1 Bot
M' U' M' U' M U' M'
11 HTM · 4 algs
2 Top Adj 2 Bot
M2 U' M' U' M'
8 HTM · 4 algs
Source: SpeedCubeDB, https://speedcubedb.com/a/3x3/EO4A, retrieved 2026-10-24: case names, groups, setups and images, and the top-voted algorithms per case with their votes. Every algorithm shown was checked by the logic engine; rejected ones are listed in docs/db-exclusions.md.