Hart

These openers are a series.

Hart
Hart is an opener invented on October 4, 2021, with the world's first performance that the first bag can always be stacked without reversing left to right, the second bag can always be TSD, and the third bag can always be PC. This opener was invented by Sioyaki.

The name "Hart" comes from the German word Hart, meaning "difficult," and the shape at the end of the second bag, which looks like a "heart".

1st bag
The first bag can always be stacked. No left-right reversal is required. There are 6 ways to stack.

2nd bag
You can always do a TSD after the Single; S-piece, J-piece, and L-piece are interchangeable in placement.

3rd bag(PC)
PC rate is 100.00%, TSSPC rate is 25.48%, TSDPC rate is 14.76%, 17 filter solutions.

Hart v2
Hart v2 is the successor to Hart; the first bag can no longer be set up reliably with only one side, but instead the PC is less difficult. This opener was invented by Ginzan.

1st bag
Setup rates are 94.44% on one side and 100.00% on both sides.

2nd bag
Always TSD after Single. Z-piece, J-piece, and L-piece are interchangeable in placement.

3rd bag(PC)
PC rate is 100.00%, TSSPC rate is 70.44%, TSDPC rate is 51.51%, 17 filter solutions.

Reference

 * [Sioyaki's Opener Wiki(Hart)]
 * [Ginzan's Opener Wiki(Hart v2)]