Iwossoleo

Iwossoleo is a Double Triple Cannon opening setup, followed by a T-Spin Double and a potential Perfect Clear (91.55%). This setup is discovered and named by a Taiwanese player Octupus Tea. The setup is named as it is Wossoleoi with shifted I piece.

First bag
The Z piece should be held.

Second bag
The second bag can always be stacked like this.

The Z and S placement order is dependent on which one comes first in the second bag. The lower Z should be placed first if Z comes before S in the second bag, and vice versa.

In case Z comes after both J and S in the second bag, one should CCW rotate the Z piece 5 times with soft drop, and move right to put it in place:

Third and fourth bag
These two bags are always stackable.

14-line Perfect Clear

 * 91.55% PC chance, 18 minimal solutions