CT Scan Stacking

CT Scan Stacking (Japanese name...CTスキャン積み) is one of the openers to stack DT Cannon, it is stabilized by stacking the second bag of Z pieces with softdrop. It can always be derived into a TD attack, which generates high firepower. This opener was invented by Ren666 on January 31, 2021 Japan time.

1st bag
There are three ways to stack them: use the original orientation when the Z piece is earlier than the S piece, and use the reversed orientation when the opposite is true. The setup rate is 79.17% on one side and 95.00% on both sides.

2nd bag
TSD is always possible, and the Z-piece can be moved to the desired location as long as you keep turning it to the left.

8-lines PC
PC rate is 26.71%, TSTPC rate is 15.56%, 3 filter solutions.

TD Attack(Always)
Two stacking methods can always be derived to the TD attack, judged by the O and J pieces, with the L piece stacked last.

reference

 * [Tetris Opener Collection at Tetfu]
 * [Sioyaki's Opener Wiki]