Submarine is a TSS → TSD → PC opener developed by Tetrio player Eternalaws, given the name "Submarine" due to it's shape roughly resembling a Submarine diverging into water. This opener can be preformed with an early L/J in the first bag. This opener leaves a relatively clean and easy to downstack board state thanks to multiple donation methods in the second bag.
L J Variant
J→Z, L→O
PC Chance 93.33%
ZOJ Variant
Z→S, O→J→L
PC Chance 85.36%
ZLO Variant
Z→S, L→O→J
PC Chance 91.51%
OJ Variant
O→J, L→SZ/SZ→L
PC Chance 94.52%
JZL Variant
J→Z→L
PC Chance 99.25%
Non-PC Variants
Second bag variants that do not lead into a PC but are helpful to ensure you get a TSD on the second bag.
S Prop
O→L
After the first TSD if you can see J before S You can go for a TSD like this on the third bag.
The third bag TSD variant is only dependent on a J before S thanks to multiple helpful L spins.
S Z Variant
This pattern has a very high succession rate thanks to multiple alt formations.
J→S/Z, L→O
L→S→Z, O→J