User:Arcorann/T-Spins

T-Spin notes.

T kicks in SRS

Oshisaure had a table somewhere but I lost it, so here it is again. Note that CCW kicks are mirrored.

Rotation	Initial state	Kick 1	Kick 2	Kick 3	Kick 4	Kick 5
u, CW					impossible
r, CW
d, CW				impossible
l, CW

Kicks that can satisfy 3-corner

Rotation	Kick 1	Kick 2	Kick 3	Kick 4	Kick 5
u -> r/l	Yes (either)	Yes (mini)	Yes (mini)	n/a	Yes (either)
r/l -> d	Yes (either)	No	Yes (full)	Yes (either)	Yes (mini)
d -> l/r	Yes (either)	Yes (mini)	n/a	Yes (either)	Yes (mini)
l/r -> u	Yes (either)	No	Yes (mini)	Yes (either)	Yes (full)

Notes by kick:

• 1 is base rotation
• 2 only gives minis (sideways-pointing minis) that may or may not be immobile.
• 3 leads to the alternate way of the classic TSD kick (if going to d) and the only way to get upwards-pointing minis.
• 4 is the Neo MTSD kick if going to d. If going to u, mini is also possible. It's not clear if there's a legal setup for getting full 3-corner with the kick going to either d or u (doesn't look like it).
• 5 is the TST kick, but only gives TSTs if starting from u; if starting from d it is the Fin TSD kick. If l/r, it becomes another up-kick similar to 4 when starting from l/r.

Analysis of Kick 4

The main problem is getting a piece into the location where it can kick upwards into the spot that satisfies 3-corner in either full or mini.

l/r -> d

We have two hypothetical setups for this kick. Adding suitable grey points to denote the four corners, we have:

from u		Mini only		n/a	Full only
from d			n/a	Inverse	Mini only

Thus, we have some new potential setups, although neither of the mini only ones can clear any lines (they can still score points though) and given their placements are thus mostly useless in practice.

To the other setup:

from u				n/a
from d			n/a

l/r -> u

from u				n/a (no inverse!)	3-corner impossible
from d			n/a

Analysis of Kick 5

l/r -> d

Again, two setups; this can only give mini. Adding grey corners:

from u				n/a
from d			n/a

from u				n/a
from d			n/a

l/r -> u

This one is full only.

from u				n/a	inverse
from d			n/a

So in this case only the inverse works.

Test cases

The minimum required to satisfy all rules is 3-corner with pointing side and the back of the T not facing a wall or floor.

Brackets indicate an unverified entry.

Before	After	Lines	Imm?	3-c?	Pnt?	Kick?	TST kick?	Back?	T.com	TF	NewT	TW	DS	NC	TZ	TOJ	TPD	TTw	Notes
Classic TSD
		2	Yes	Yes	Yes	No	No	Empty	Full	Full	Yes	Yes	Full	Full	Full	Full	Full
		1	Yes	Yes	Yes	No	No	Empty	Full	Full	(Yes)	Yes	Full	_	_	_	Full
		1	Yes	Yes	No	No	No	Empty	Mini	_	_	Yes	Full	_	_	_	Mini
		1	No	Yes	No	No	No	Empty	Mini	_	_	Yes	Full	_	_	_	Mini
		2	Yes	Yes	Yes	Yes (3)	No	Empty	Full	_	_	Yes	Full	_	_	_	Full
TSS from classic TSD setup
		1	Yes	Yes	Yes	No	No	Empty	_	_	_	_	Full	_	_	_	Full
		1	Yes	Yes	Yes	No	No	Empty	_	_	_	_	Full	_	_	_	Full
		1	Yes	Yes	Yes	Yes (3)	No	Empty	_	_	_	_	Full	_	_	_	Full
		1	Yes	Yes	Yes	Yes (3)	No	Empty	_	_	_	_	Full	_	_	_	Full
Upward-pointing Mini TSS
		1	Yes	Yes	No	Yes (3)	No	Floor	_	_	_	_	Mini	_	_	_	Mini
		1	Yes	Yes	No	Yes (3)	No	Block	_	_	_	_	Mini	_	_	_	Mini
		1	Yes	Yes	No	Yes (3)	No	Empty	_	_	_	_	Mini	_	_	_	Mini
Sideways-pointing Mini TSS
		1	Yes	Yes	No	Yes (2)	No	Block	_	_	_	_	Mini	_	_	_	Mini
		1	Yes	Yes	No	Yes (2)	No	Empty	_	_	_	_	Mini	_	_	_	Mini
		1	Yes	Yes	No	Yes (2)	No	Wall	_	_	_	_	Mini	_	_	_	Mini
TST-kick setups
		3	Yes	Yes	Yes	Yes (5)	Yes	Block	Full	Full	_	_	Full
		2	Yes	Yes	Yes	Yes (5)	Yes	Block	Full	Full	_	_	Full
		1	Yes	Yes	Yes	Yes (5)	Yes	Block	Full	Full	_	_	Mini
		2	Yes	Yes	No	Yes (5)	Yes	Block	_	_	_	_	Full
		1	Yes	Yes	No	Yes (5)	Yes	Block	_	_	_	_	Mini
		2	Yes	Yes	Yes	Yes (5)	Yes	Hole
		1	Yes	Yes	Yes	Yes (5)	Yes	Hole
		1	Yes	Yes	No	Yes (5)	Yes	Hole	Full
		3	Yes	Yes	Yes	Yes (5)	Yes	Wall
TST-kick chaining setups
		1	Yes	Yes	No	Chain	Chain	Empty	Full
		1	Yes	Yes	No	Yes (3)	Chain	Floor	Mini
		2	Yes	Yes	No	Yes (3)	Chain	Block	(Mini)
		2	Yes	Yes	No	Yes (3)	Chain	Wall	(Mini)
		1	Yes	Yes	No	Yes (2)	Chain	Block
		1	Yes	Yes	No	Yes (2)	Chain	Empty
		1	Yes	Yes	No	Yes (2)	Chain	Wall
Neo MTSD-like
		2	No	Yes	No	Yes (4)	No	Block	(*1)	_	n/a	_	Full	_	_	_	Mini	(*2)
		1	No	Yes	No	Yes (4)	No	Block	_	_	_	_	Mini	_	_	_	Mini
		1	No	Yes	No	Yes (4)	No	Empty	_	_	_	_	_	_	_	_	Mini
Fin TSD-like
		2	No	Yes	No	Yes (5)	Yes	Block	_	_	_	_	Full	_	_	_	Full
		1	No	Yes	No	Yes (5)	Yes	Block	_	_	_	_	Mini	_	_	_	Full
		1	No	Yes	No	Yes (5)	Yes	Empty
		1	No	Yes	No	Yes (5)	Yes	Wall
Reverse TST kicks

The following list some mishandlings of MTSDs:

• Tetris.com (*1): 2 lines, 0 points, does not begin back-to-back
• Tetris Twist (*2): 2 lines, 200 points, treated as Mini T-Spin Single

Setups

Links

• What a T-Spin Mini is and why they are so confusing - has some edge cases