Pinwheel

Under Construction

Pinwheel is a TSS → TSD → PC opener created by Winterfrost. In the first bag you only need S/Z before I, and O before L/J with the mirrored version.

= 1st Bag = This is the preferred way to stack the 1st bag.

Alternatively, if stacking like above is not possible one may be able to opt for a skim version. This is not recommended and it would be best to use a different opener if you can't stack it normally.

1st Route
This bag can always be stacked this way.

If you have a late Z piece, rotate clockwise, softdrop and rotate counter-clockwise twice to get it in place, as shown below.

8-Height Perfect Clear
This field has a 95.95% chance of achieving a perfect clear. There are only 9 minimal solutions, however due to the TS/Z you technically only need to memorize 6 different solutions.

STSD
If a perfect clear isn't possible or you receive garbage, you can make an STSD with a relatively high build chance.

If stacking like above is impossible, it would be best to either freestyle the STSD or just stack up normally.

Count-to-4
In the first diagram above, it is possible to do a Z-Spin if you get Z after T and S. After the Tetris, you have a 100% chance of building an STSD.

If you build the O before J variant, you will have a 34.48% chance of achieving a 14 line perfect clear.

The first solution can give you a T-Spin Single.

2nd Route
This route leads to a higher 8 height perfect clear chance than the first route, but it requires more memorization.

O before L (99.80% PC)
This setup has 7 minimals. You also need S to come before L or Z if you're playing a game without 180 rotations.

L before O (100% PC)
This setup has 11 minimals.

Shachiku Train
A TSD follow-up you can take instead of a perfect clear if you get S before L.

Due to the jagged residue of the second variant, it may be best to freestyle or try a different orientation of the J piece in the previous bag for a flatter board.

This can also be continued with another shachiku train.

A 4-Wide is also possible with this residue.

STSD
You can always stack an STSD this way, although the bad residue makes it a questionable continuation.

Perfect Clear after 14 lines
It is always possible to stack one of these ways.

This can always be stacked like above with 180 rotations, although if you get J before O then you can stack it this way instead.

This field has a 78.85% chance to perfect clear with only 4 solutions.

= Vertical TSS =

Double Triple Double
Discovered by mLurker. This bag can be stacked this way almost every time.