Algorithm Bruce D. MacKenzie 17.09.2014 (Domain of the Cube Forum)
L U B' R D F' D B' R' D' R' (F' U)2 L' B U R B D' L F' U L' U (26 ltm, 26 ftm, 26* qtm)
Algorithm Bruce D. MacKenzie 04.09.2014 (Domain of the Cube Forum)
L U B D R2 U2 B2 R2 D2 R D2 F · R L' · U F2 R' · F B2 · D' B' R' U2 (23 ltm, 23 ftm, 32 qtm)
Algorithm Walter Randelshofer 06.04.2022
CD2 CR' · U2 L2 F D MR D2 R MF R' U' F2 MR2 D2 R B' D MF' U' R' (19 ltm, 23 ftm, 30 qtm)
Note
The Superflip (++u) with 4 Dots is a version with the center u rotated around 180°. In the Super Group, where center rotations are regarded as well, this pattern can be generated optimally in 19* ltm, 23* ftm and 26* qtm.