From Hard Drop Tetris Wiki
Hart is an opener invented on October 4, 2021, with the world's first performance that the first bag can always be loaded 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
JI,JO |
IO,OS |
T |
LO |
JO,JS |
LS |
IT |
The first bag can always be loaded. No left-right reversal is required. There are seven ways to stack, and the comments below will help you determine which piece came first.
2nd bag
S>L |
L>S |
Single |
TSD |
|
The second bag can always be loaded. You can always do a TSD after the Single; S-piece, J-piece, and L-piece are interchangeable in placement.
3rd bag(8-lines PC)
26.1%(TSD chance) |
26.0% |
22.7% |
22.7% |
22.1% |
22.1% |
21.5%(TSS chance) |
16.7% |
16.7% |
16.1% |
13.7% |
13.6% |
13.3% |
12.7% |
12.7% |
6.3% |
6.3% |
A PC is always possible (17 filter solutions). Since the cavity is symmetrical, you have learned two solutions in one.