Its interesting to see what other communities are out there. Koreans are on the rise since Puyo Puyo Tetris and the openers they use tend to be different. Riviclia showed me some openers and I saw other Koreans use them as well.
Alexandra once linked me two of those 14 lines PC loop openers, both by the same Japanese author (there might be more; I haven't checked his Youtube channel). Both loops have in common that they start with 4 T-Spins in the first 4 bags and that you have to make an odd clear in the 5th bag (with odd clear I mean clearing a Single with an odd number of empty cells in the rows below).
The
first one doesn't look promising in my opion. It starts with Air TSD -> TST -> TSD -> TSD. There's only one good case where you have a 86 % PC chance.
Detailed Fumen. Simplified Fumen:
The
second one looks more interesting in my opinion. The start resembles TKI a bit. It starts with TSD -> TST -> TSD -> TST. The problematic part is the second bag. Afterwards, chances are good that you end up in the setup that leads into a Perfect Clear. It's 98 % PC rate for the good setup whereas the most frequent solution has a 66.7 % chance of working (despite of that odd clear and T-Spin Triple overhang).
Detailed Fumen. Simplified Fumen: