From Hard Drop Tetris Wiki
When you do a perfectclear loop that takes 8 lines to complete, such as FirstSecond perfect clear, SingleYou or Mountainous Stacking, you will be left with an empty board and an extra piece. A DPC setup will use the extra piece and 2 bags to create a TSpin and a perfect clear, bringing you back to the beginning with no extra pieces, to continue the loop.
Note: TSpin percentages do not include TSMS.
Note: All setups on this page are 100%. However, you may need 180 spins for some solves.
Generally, one should prioritize saving O and S/Z, although I is also viable. Try to avoid saving J/L and T whenever possible, as they yield the lowest scoring patterns.
Extra setups can be found at Extra DPC Setups.
O piece
O > L/J (Kuruma DPC)
TSpin Chance  0.00%
Tetris Chance  82.78%
Bad Solve Chance  17.22%



Solutions:


This is a solve that can get you a Tetris where others wouldn’t, but is not neccessary.

L/J > O (TSD DPC)
TSpin Chance  63.85%
Tetris Chance  0.00%
Bad Solve Chance  36.15%
Note: This is the most efficient Extra O DPC.



Solutions:



These are 2 setups that can get you extra TSpins.


S/Z piece
O > S/Z (Kuruma DPC)
TSpin Chance  0.00%
Tetris Chance  82.78%
Bad Solve Chance  17.22%
Note: this shape is the same as the extra O DPC when you have O before L, so it has the same solutions.



Solutions:


This is a solve that would get you a Tetris when others wouldn't, but it is not necessary

S/Z > O (Lime DPC)
TSpin Chance  33.33%
Tetris Chance  0.00%
Bad Solve Chance  66.67%
Lime DPC is notoriously hard to solve and scores very little on average; avoid it when possible.



Solutions:






The last solution may sometimes yield a TSS or TSD.
This extra solve can sometimes get you a TSS as well:

I piece
O > I (Fake Butter DPC)
TSpin Chance  0.00%
Tetris Chance  66.67%
Bad Solve Chance  33.33%
This setup will have to be mirrored depending on whether J or L comes first.



Solutions:


JL > O (Pelican DPC)
TSpin Chance  18.57%
Tetris Chance  56.67%
Bad Solve Chance  29.68%
This setup will have to be mirrored depending on whether S or Z comes first.



Solutions:


These are 2 setups that can get you extra TSpins.


I > O > L (Bad TKI DPC)
TSpin Chance  0.00%
Tetris Chance  36.67%
Bad Solve Chance  63.33%
This pattern, when mirrored, will cover the bags not covered by the previous 2 setups. However, you should avoid it when possible due to mediocre scoring.



Solutions:

J/L piece
Note: These setups are not 100% consistent without 180 spins.
S > Z (MKO SPC)
TSpin Chance  55.24%
Tetris Chance  0.00%
Bad Solve Chance  44.76%
If you have the L piece, the piece requirement is flipped.



Solutions:



Z > S (TSM J SPC)
TSpin Chance  33.33%
Tetris Chance  67.78%
Bad Solve Chance  32.22%
Different builds depending on whether the O or the S comes first. A third of the time, you will be able to make a TSS into Tetris.






Solutions:

This solve will sometimes get you a TSS when the normal solve doesn't have any extra scoring:

T piece
There is only 1 pattern needed. It does not require mirror.
T (OSZ Ball DPC)
TSpin Chance  0.00%
Tetris Chance  71.67%
Bad Solve Chance  28.33%



Solutions:

Note: S can be placed after J and Z have been placed with the input sequence CW > CW > 180 > Softdrop > CW.
Since OSZ is interchangeable (hence the DPC name), there are 3 extra Tetris solves that can be used for a higher Tetris chance:



Further research
johnbeak's DPC database, has both minimals and more advanced setups.
metallicLurker's DPC minimals, orientated towards beginners.
smolfeesh's video on the more advanced DPC setups.
The DPC scoring hierarchy spreadsheet.