PAL 19-3 is probably the most difficult but still possible B-Type challenge for DAS players and slow tappers. The stack is up to 8 rows over the bottom which makes it incredibly hard to get pieces to the left side.
Back in june 2020 I came very close to beating it on emulator which I showed via history viewer. Until march 2021 I grinded it a lot still on emulator, but all I got is 17-18 lines (15 lines daily, pretty sure).
After I fully switched to console in june 2021, B-Type wasn't as attractive to me since I didn't have a game genie to skip the time I would have to wait between the games. So I almost never played it until this month.
(In 2022 I got a tetris gym cartridge without B-Type, but) one month ago I got a tetris gym V5 cartridge which included B-Type in which it is possible to skip all the bad starts. My first project was trying to max out every PAL starting level which was working quite well (currently more or less only the levels 20-50 are missing). But then the date 3/19 came and I picked up 19-3 again. Thanks to everyone who helped me make this happen!!