T-Spin

(Redirected from T-spin)

Modern Tetris games reward the player for twisting the T tetrimino into a tight space. This kind of move is called T-spin.

Current rules

T-spins are detected and rewarded upon the locking of a T tetrimino. The mechanism can be described as follows:

• The last maneuver of the T tetrimino must be a rotation.
• If there are two minoes in the front corners of the 3 by 3 square occupied by the T (the front corners are ones next to the sticking out mino of the T) and at least one mino in the two other corners (to the back), it is a "proper" T-spin.
• Otherwise, if there is only one mino in two front corners and two minoes to the back corners, it is a Mini T-spin. However, if the last rotation that kicked the T moves its center 1 by 2 blocks (the last rotation offset of SRS), it is still a proper T-spin.
A T is dropped. Three corners are
detected, two to
the front.
T-spin single.
Another T. Three corners are
detected, but two
are to the back.
Mini T-spin single.
Yet another T. Two corners are
to the back, but
the rotation brought
the T's center 2 blocks
down, 1 block right.
T-spin double.

If the T is facing against a wall or floor, the two back corners are considered as if there were minoes there.

This mechanism of detection has some scenarios that do not quite make sense as "twisting the T into tight space" but it still rewards them anyway. Some of them are as follows.

T on the stack.
(Black minos represent
the playfield's walls
and floors.)
Three corners are
detected, but is
this a twist?
Yes, it still is.
Mini T-spin single.
Same board
as the first.
Rotate like this... but then immediately
rotate it back.
Mini T-spin single.

Rewards

Scoring

Main article: Scoring#Recent guideline compatible games

The amount of score awarded for a T-spin depends on the number of lines cleared using it and whether it is Mini.

Lines Mini T-spin T-spin
0 100 400
1 200 800
2 400 1200
3 [Impossible.] 1600

The score is then further multiplied by the level and back-to-back bonus.

Any T-spin that clears lines, whether Mini or not, is considered "difficult" and will trigger back-to-back. T-spins that clear no lines, however, don't break the back-to-back chain. Also, on tetris.com, vertical TSMDs give no points, will give the lines, but the line goal is +2 multiplied by times performed.

In battles

T-spins usually send garbage to opponents. T-spin doubles are at least as powerful as a Tetris and are commonly sought after in battles, while T-spin triples are even scarier. Various setups have been created to create opportunities for T-spins and utilize them as much as possible.

Other rules

Immobile

In The New Tetris, T-spins are recognized if the T tetrimino cannot move in any direction when locking. There is only a reward if rows are completed this way.

Lenient

Tetris the Grand Master 3: Terror-Instinct declares a "T-SPIN!" simply if the last movement of a T is rotation when clearing lines.