I-Spins in SRS

Different games that use SRS apply different wall kicks and floor kicks when the player twists the I tetromino. SRS in TGMA is partially symmetric, fully symmetric in TGM3 and Tetris Perfect/Tetris Return.

Official SRS

Tetris Worlds, Tetris DS and Tetris The Grand Master Ace are based on the Tetris Guideline, including SRS. They have the following behavior:

Rotated left

Soft dropped

Rotated right

But the wall kicks are not symmetric, as Tetris Worlds, Tetris Deluxe, Tetris DS and Tetris The Grand Master Ace prefer to kick up rather than down when rotating left...

Rotated right

Soft dropped

Rotated left

...unless there is another block to force a kick down:

Rotated right

Soft dropped

Rotated left

The following can be performed instead. This is a well-known cheat in Tetris DS.

Rotated left

Moved right

Soft dropped

Rotated left

Tetris Advance

Minna no Soft Series: Tetris Advance, while implementing SRS, included several bugs including the lack of some wall kicks.

Rotated left

Soft dropped, can't rotate right

Lockjaw

In Lockjaw, both left and right prefer to kick down rather than up when rotating:

Rotated right

Soft dropped

Rotated left

Arika SRS

Arika SRS (used in TGM3 and Tetris Perfect/Tetris Return's SRS) always prefers to kick up. This is very bad for some setups.

Tetris Best/Perfect/Return

Tetris Best, Tetris Perfect and its mods use a custom symmetrical rotation system that always prefers to kick down than up, so the problem is solved. Also, the additional kicks not in SRS make it possible to make I-spin Tetris:

Rotated right

In Tetris Best, this is the extreme kick, so this setup is needed. In Tetris Perfect and mods, it may be displaced up+right due to 3-kicks. It may also be displayed one more row up due to force rotation (which allows 4-kicks).