The T tetromino can only fit under the overhang either from sliding or from utilizing the T-Spin Single twist. To use the T-Spin Single twist, make sure the wall opposite the overhang is at least two rows high.
Does not work.
Works
Works
Soft drop to here
Rotate right
Rotate right
If a T-Spin Triple is built on top of an empty garbage column, the column will be open after the setup is performed if it lies under the notch or the filled column beside the notch. This can also apply to other columns if their heights are lower than that of the empty cell under the overhang.
The overhang left over by a T-Spin Triple can be cleared with a twist, namely a T-Spin Single. Slides and line clears also work. The T-Spin Single method is best used if you have a T tetromino ready or coming soon. Delaying the removal of the overhang can cause overstacking which may leave you with an awkward stack, and is time taken away from removing garbage underneath the setup.
T-Spin Single
L-Spin
J Slide
O Line Clear
Try to build the notch above an empty column or cell to set up a T-Spin Double in advance. This combination is referred to as a Triple Double
You can bailout of the setup with a T-Spin Double to avoid stacking high over an empty column
