PT Stacking

These are a series of openers.

PT Stacking
PT Stacking (PT積み) is one of the openers that performs TST on the second bag. 6-lines PC and 8-lines PC are easy to determine and acquire. This opener was invented by Sasa.

1st bag
There are two ways of stacking; the I-piece is the foundation. The setup rate is 56.43% on one side and 64.05% on both sides.

2nd bag
There are three routes: the first (ideal) offers the chance to obtain a 6-lines PC or an 8-lines PC.

3rd bag(PC)

 * 2nd bag ideal shape→6-lines PC(PC rate is 28.57%, 1 filter solutions.)


 * 2nd bag ideal shape→8-lines PC(PC rate is 87.38%, 6 filter solutions.)

True PT Stacking
True PT Stacking (真PT積み) is one of the openers that performs TST on the second bag. 8-lines PC can be obtained consistently at a very high rate. This opener was invented by Sasa.

1st bag
There are two ways to stack. Setup rates are 64.44% on one side and 91.11% on both sides.

2nd bag

 * 6-lines PC route

If you can perform a TST with a Z piece, S piece, and I piece stacked this way in the second bag, you have a possible 6-lines PC; you can get it when the first piece in the third bag is an O, S, I, or T.


 * 8-lines PC route

TST is always possible; O-piece, J-piece, and L-piece are interchangeable in placement.

3rd bag(PC)
PC rate is 99.96%, TSSPC rate is 12.06%, TSDPC rate is 5.71%, 39 filter solutions.

reference

 * [PT Stacking Sioyaki's Opener Wiki]
 * [True PT Stacking Sioyaki's Opener Wiki]