T4r+
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 F R L' R U' L R' F R L' U R' U L
My choice
15 HTM · 15 STM · 15 QTM
rotationless
<U,R,F,L>
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: R L' U' R U' L R' F' R L' U R' L R' F' R' R. Every algorithm above was run by our logic engine from that state and reaches "solved-up-to-r".