Hajin Stacking is a TST —> PC opener that also has a high chance for a 4-line PC.

1st Bag

J is on hold, or L if mirrored. There is a 65.6% of stacking the 1st bag with mirror, or 36.5% without mirror.

Mirror

4-Line PC

There is a 66.6% chance of PC with 33 minimals.

2nd Bag TST

This is the best way to build the second bag if there isn't a PC. There are 4 ways to place the JJLOZ (There are 2 ways to place the 2 Js in the 2nd image):

You now have an 100.0% chance to PC with 213 minimals. Most solves can be freestyled, but here are the 90 most common solves.

2nd Bag Compromise TSD

This can always be built, with the interchangable LJO rectangle:

O<L

L<O

You now have a 99.05% chance to PC with 139 minimals. Again, most solves can be freestyled, but here are the 65 most common solves.

There are other TST shapes with good PC chances, but they are not worth learning; just learn the main TST and the compromise.

External links

• The original opener on sioyaki