Perfect Clear Opener (パフェクリテンプレ)

A very popular perfect clear opener where you have a 84.64% chance of doing a perfect clear if you have I on hold. Often abbreviated as PCO.

If you are unable to hold your I, your chance of doing a perfect clear decreases to 61.19%


Solutions

Vertical I

The only potentially non-straightforward solution would be the one using IJZS. Rotate CCW CCW CCW.

0

These solutions are also used in Grace System when you have a vertically placed T.

1st Row I

3rd Row I

Others

2-height PC

There is a slight chance (approximately 2%) to do a 2-height perfect clear after doing your first PC. Example.


Recovery

These are some followups that you could do when a perfect clear is not possible.

Tetris

The simplest way of recovering is to build a Tetris after sliding in a L or J underneath, as shown on the second image. Note the placement of S on the third image.

Kaidan

It is often possble to build a Kaidan when you can't do a perfect clear. You will be able to immediately follow up with a Tetris afterwards. Notice how S and Z are placed on the third image.


Compare the placement of S on your stack between when you would build Kaidan (first row) and when you would build a Tetris (second row)


TST

Depending on your next pieces after placing your S like the first image below, you could build a TST instead of a Tetris.


credit to kazu for the example

Unnamed Technique

These are alternate recovery patterns that you can use. Refer to this fumen to see how you can spin in certain pieces while setting these up.

See Also / References

🙃 Toggle Mirror
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