I have watched many videos of Tetris and of particular interest to me are the methods of doing repeated T spin doubles. It scores many more points than even using repeated Tetris(4 lines at once) clears. For an example of how it works, here is a video of me doing it.
I was using this method by copying other videos where it was done, however I could not find the name or source to read about this method. I finally found it!
There are two methods that work which are listed on that page. Both of them work and can give you 15 or more T spin doubles in a row. However the pattern will be broken after that because the stack gets continually higher. Even so, this is a way to boost your score at the start of the game.
There is a catch though. Certain blocks must randomly come to you at the start. Particularly for the first version of the loop as shown in the above video, there must be a T block to place the J and Z blocks on top of exactly as shown. If your first two blocks are J and Z then even the hold feature won’t save you and you will have to do something different, including a possible mirrored setup so that you can use the L and S blocks instead.
The second method, which is referred to as Mechanical TSD v3 is a little bit harder to explain and instead requires the I block near the start because other blocks must be placed on top of it. However this method also has more variations on which two pieces can be used. I have a video of me using this method as well.
My score is not as high as in the other video because I don’t have as much practice with this method but it’s still capable of the same thing once you get it started.
There may even be other methods of doing repeated T spin doubles this easy that have not been discovered yet. As long as Tetris has been around there are still people making new achievements.
Also it’s worth mentioning that modern versions of Tetris make these loops possible only because of the 7 bag system where you will get all 7 pieces each 7 blocks dropped but the order is randomized. This means that it’s completely unlike the original Gameboy or NES Tetris you might be used to if you are a classic player.
Also, here is my Tetr.io profile if you want to try beating my scores or challenging me in multiplayer sometime.
I believe that these demonstration videos of mine will help other players who are looking for ways to score higher and go far beyond what I can do. There are a few other videos on the internet but not nearly enough to make it clear how easy T spin doubles are to make.