T4b-
Notation
Nautilus 1LLL
LL Trapezoids / T4
Match the case drawing, including the side colours and the pieces already solved; hold the puzzle as drawn.
Your status
Algorithms (1)
(R') first, then:
R L' B L F' L' B' L F
My choice
9 HTM · 9 STM · 9 QTM
rotationless
<R,F,L,B>
Do R' first on the case as drawn. · Cubemuch
How this case is verified
The source's case image defines this case; its setup is reconstructed and checked against that independent pattern. Setup: F' L' B L F L' B' L R' R. Every algorithm above was run by our logic engine from that state and reaches "solved-up-to-r".