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. The upsides to this opener are that it requires a lot less memorization than most other SDPC openers while simultaneously having a high chance to perfect clear, and every path has a good chance to score a Tetris with the perfect clear. The downsides are that it is a little slower than others and requires somewhat tricky to learn input sequences for certain queue orders.

= 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.

= 2nd Bag =

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 be stacked a majority of the time, however there is a fallback that has a 100% build rate with 180 rotations and a 78.85% chance to achieve a perfect clear for when this cannot be stacked.

This field has a 100% perfect clear rate with only 3 minimal solutions, with each one being able to give you a Tetris.

Although this can always be stacked with 180 rotations, certain queues will need a lot of waiting for gravity.

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

J Before and After O
You only need the first two setups to cover all bags.

Mehcanical TSD
It is always possible to build and stack a Mechanical TSD-like stack with the first two setups above.

J before O:

O before J:

ST Stacking
It is possible to go into ST Stacking with all three setups, although you may have to waste T due to the piece dependencies needed to build up the stack.

J before O:

O before J, Variant 1:

O before J, Variant 2:

3 and 4-Wide Stacks
The first two setups can go into Center 4-Wides, while the third setup can go into a Center 3-Wide. If you really want to, they can be converted into 3 or 2-Wides or 6-3 Stacking, although doing so would take more time and pieces.

J before O:

O before J, Variant 1:

O before J, Variant 2:

Perfect Clear After 14 Lines
J before O:

This field has a 99.68% chance of achieving a 14 line perfect clear with only 4 solutions. Just knowing the first solve puts it at a 95% chance. Only the last one does not have the chance to give you a Tetris.

O before J, Variant 1:

work in progress

This field has a 73.61% chance of achieving a 14 line perfect clear with only 4 solutions. Each one has the possibility of scoring a Tetris.

O before J, Variant 2:

work in progress

= Vertical TSS =

Double Triple Double
Discovered by mLurker. This bag can be stacked this way almost every time. It sends the same amount of garbage as Stickspin, although it requires a lot of soft drops.