Hook

This is a setup called the "Hook," named for the way the piece hooks in. It is performed on what is known as a "Dead Shape," or a shape that is normally difficult to clear. Using a "J" and a "Z," one can clear the obstacle. In games that reward All-Spins, this is powerful knowledge. One can also intentionally create it, allowing for All-Spin reward.

Empty Field Setup
With the right piece rationing you can use your first L or J to attack.

T-Spin Triple
Possible alternative whenever a T-Spin Triple setup is present.

Captain Hook
One can open with a TST, leaving a Hook behind (JSD into ZSD).

Peter Pan
One can open with a TSD, leaving a Hook behind (JSD into ZSD).