ELS R4
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Find the pair's shape as for F2L, then count the misoriented last-layer edges (a top edge whose top facet does not show the top colour).
Your status
Algorithms (9)
(U2) first, then:
R' F R F' U2 F' U' F
My choice
8 HTM · 8 STM · 9 QTM
3-gen
rotationless
<U,R,F>
Do U2 first (AUF) on the case as drawn. · Cubemuch
y' U Rw' U R U' R' U' Rw
8 HTM · 8 STM · 8 QTM
2-gen
rotation
oh
<U,R>
Cubemuch
(U) first, then:
B' y' B R B' R' y R' B
7 HTM · 7 STM · 7 QTM
2-gen
rotation
<R,B>
Do U first (AUF) on the case as drawn. · Cubemuch
(U2) first, then:
x R' U R y U' R2 U' R' U
8 HTM · 8 STM · 9 QTM
2-gen
rotation
oh
<U,R>
Do U2 first (AUF) on the case as drawn. · Cubemuch
(U2) first, then:
y2 Lw' U' Lw B' Lw' B' U Lw B
9 HTM · 9 STM · 9 QTM
3-gen
rotation
<U,L,B>
Do U2 first (AUF) on the case as drawn. · Cubemuch
(U) first, then:
B2 y' B R B' R' y B R' B
8 HTM · 8 STM · 9 QTM
2-gen
rotation
<R,B>
Do U first (AUF) on the case as drawn. · Cubemuch
Rw U' Rw' U' Rw U Rw' F' Rw U' Rw' F2
12 HTM · 12 STM · 13 QTM
3-gen
rotationless
<U,R,F>
Cubemuch
(U2) first, then:
R y R U R' U' R U' R' y' R'
9 HTM · 9 STM · 9 QTM
2-gen
rotation
oh
<U,R>
Do U2 first (AUF) on the case as drawn. · Cubemuch
(U') first, then:
Rw B Rw B2 y B' y2 Rw' B' Rw' B'
9 HTM · 9 STM · 10 QTM
2-gen
rotation
<R,B>
Do U' first (AUF) on the case as drawn. · Cubemuch
How this case is verified
The case is the source's setup (or, where it has none, another source algorithm reversed). Setup: Rw' U R U R' U' Rw U' y. Every algorithm above was run by our logic engine from that state and reaches "f2l-eo".