Uploaded April 2019 | Updated September 2026, 1 hour ago
Game is Jstris (with modded graphics). Both T-Spin Double loops were inventended by Korean sub20 player Riviclia.
youtu.be/IGldK0xG9GE , youtu.be/LAsUFTa1YrE
Those looping patterns should work in every Tetris game with hold feature and bag randomizer (almost every official Tetris game since 2002), as long as gravity doesn't become too high. Here are 2 fumens showing how I want to stack each bag.
tinyurl.com/yxheydem , tinyurl.com/yy39ve6h
Note that you cannot stack infinitely in both cases because T-Spin Double-only makes your stack grow by 8 filled cells per bag. However, there's a high chance that you can stack for a long time with the first technique, if you burn lines from time to time properly.
Also note that both techniques aren't really meant to be used seriously. All that softdropping makes the execution rather slow - especially in official games. And techniques like Infinite TST or ZT Stacking have a higher efficiency.
No-copyright music: "Permafrost" by Dano
Game is Jstris (with modded graphics). Both T-Spin Double loops were inventended by Korean sub20 player Riviclia.
youtu.be/IGldK0xG9GE , youtu.be/LAsUFTa1YrE
Those looping patterns should work in every Tetris game with hold feature and bag randomizer (almost every official Tetris game since 2002), as long as gravity doesn't become too high. Here are 2 fumens showing how I want to stack each bag.
tinyurl.com/yxheydem , tinyurl.com/yy39ve6h
Note that you cannot stack infinitely in both cases because T-Spin Double-only makes your stack grow by 8 filled cells per bag. However, there's a high chance that you can stack for a long time with the first technique, if you burn lines from time to time properly.
Also note that both techniques aren't really meant to be used seriously. All that softdropping makes the execution rather slow - especially in official games. And techniques like Infinite TST or ZT Stacking have a higher efficiency.
No-copyright music: "Permafrost" by Dano
![Shortest solutions Celebrating 50 years of Kids Coding (Google Doodle Dec 4th 2017)
edit1: way more elegant solution to last riddle (as suggested by David Sili): [ ( move + rotate + move ) x 4 + rotate ] x 4 , rotation direction doesnt matter in both cases
edit2: Apparently, you can change how often a loop is repeated. With it, you can solve last riddle with just 4 elements (as suggested by Andrey Rybak): ( move x 3 + rotate ) x 13, thats the same path as in my solution but way less elements
I am no kid but I thought the doodle looked cool. The solution to the last puzzle looks kinda weird. The goal is to minimize the number of used elements (4 x loop just counts as 1), not the number of steps the bunny makes. Shortest solutions Celebrating 50 years of Kids Coding (Google Doodle Dec 4th 2017)](https://i.ytimg.com/vi/uRFuPfyOL3U/mqdefault.jpg)



