B1-
PLL
B - Double R block
Look for blocks (pairs and lines of matching stickers) on the sides; their kind and position name the group.
Your status
Algorithms (2)
R' U' R U R U2 R' U' R' U R2 U2' R'
My choice
13 HTM · 13 STM · 16 QTM
2-gen
rotationless
<U,R>
LowCubes
y2' R U2 R2' U' R U R U2' R' U' R' U R
13 HTM · 13 STM · 16 QTM
2-gen
rotation
<U,R>
LowCubes
How this case is verified
The case is the source's setup (or, where it has none, another source algorithm reversed). Setup: R' U' R U R U2 R' U' R' U R2 U2' R' y2. Every algorithm above was run by our logic engine from that state and reaches "pll-solved", keeping first-layers and oll-solved.