IS28
Notation
Last bottom triple
LBT / In Slot
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:
R' BR' U' BR B' BR U BR' U' B U
My choice
11 HTM · 11 STM · 11 QTM
rotationless
<BR,U,R,B>
Do R' first on the case as drawn. · Cubemuch
(R') first, then:
R' BR' R F' U F U' BR U' BR' U R' BR
13 HTM · 13 STM · 13 QTM
rotationless
<BR,U,R,F>
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 BR' R U' BR U BR' U F' U' F R' BR R R. Every algorithm above was run by our logic engine from that state and reaches "lbt-solved".