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 (2)
(R) first, then:
R' Lw' B' Lw B R' B L' B' L U R U' B'
My choice
14 HTM · 14 STM · 14 QTM
rotationless
<U,R,L,B>
Do R first on the case as drawn. · Cubemuch
(R) first, then:
R U' R' U L R' L Uw' R' Uw F R F' L' Do Uo
14 HTM · 14 STM · 14 QTM
rotation
<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 Uo' Do' L F R' F' Uw' R Uw L' R L' U' R U R' R'. Every algorithm above was run by our logic engine from that state and reaches "solved-up-to-r".