OS15
Notation
Last bottom triple
LBT / One solved
Match the case drawing, including the side colours and the pieces already solved; hold the puzzle as drawn.
Your status
Algorithms (2)
(R') first, then:
Ro' R L R U F' U' F R' L' Ro
My choice
9 HTM · 9 STM · 9 QTM
rotation
<U,R,F,L>
Do R' first on the case as drawn. · Cubemuch
(R') first, then:
R Ro' L R U F' U' F R' L' Ro
9 HTM · 9 STM · 9 QTM
rotation
<U,R,F,L>
Do R' first on the case as drawn. · Cubemuch
How this case is verified
The source's tracked-sticker identities define this case; its setup is reconstructed and checked against them. Setup: Ro Ro' L R F' U F U' R' L' Ro R' R. Every algorithm above was run by our logic engine from that state and reaches "lbt-solved".