T-Spin Triple (TST)

Setup

Below are variations of TST setups used in situations where you need a quick overhang. For the third overhang, you would spin in another J like this after the TST

Building TSTs

There are four main ways to build a TST mid-game.

Notch

The notch is probably the most straightforward shape to recognize. Notice how using LJ (first image) is not the only way to create a TST. Other combinations may lead to a cleaner stack.

Below is a shape that is essentially the same as a notch with J/L already placed so you can create a TST from this shape as well.

Two-step stair

Whenever you see this two-step stair, you can consider building a TST.

Some examples:

​S and Z can be used to build a 2-step stair. Useful for TST donations.

Using S or Z

When it's a one-step stair, using S or Z would be the easiest:

TSD to TST

When you use S or Z to create the TST shape without filling in the block marked red, there's an opportunity to build another TST or a TSD.

This TSD would also leave the same residue.

You could also follow up with a TSD.

TSD conversion

Incomplete TSDs and TSDs can be converted into TSTs. These conversions are especially useful when building Triple Doubles to fix bad overhangs and converting TSD donations into TST donations.

Neo-TSDs can also be converted into TSTs:

Tips

TST vs. TSD

Sometimes it is beneficial to do a TSD instead of a TST.

Cleaning Up

After performing a TST, you are always left with an overhang, which needs to be cleaned up.

Traditional

TST overhangs are generally cleaned up with either J or L when you're trying to maintain Back-to-Back. People do use T-Spin Minis to clean up their TST overhangs, but in many cases, it is better to just use that T in the stack to follow up with a Tetris or a TSD.

Since we already know that we're going to place a J/L under the leftover overhang, we can match the column parity on the other side and create a TSD overhang in anticipation.

Here are some examples of using the same anticipation with an alternate overhang.

Kaidan

Some TST overhangs can be cleaned up with donations. These techniques are especially useful when you do TSTs that would leave remaining columns underneath like the second picture below, which are generally avoided.

When you use S or Z for the overhang, it is possible to clean it up with a donation technique which is essentially a Kaidan.

Shachiku Train

Shachiku Train and similar techniques would be another way when you place your S/Z horizontally for the TST overhang:

Other

Many other methods exist. Here are some other examples of cleaning up the TST overhang with donations.

Incomplete TSTs

Once you become comfortable with building regular TSTs, you could also start incorporating incomplete TSTs into your stacking. Below would be the most basic form:

Here are some more advanced examples:

Cleanup for these TSDs are usually done by sliding in a J/L underneath. In some cases, you can spin them in instead.

Double TST

Used as a spiking technique, however, in limited situations as it is risky to build mid-game. They're usually made during the early phase of the game when you have no garbage lines because it is very easy to get spiked.

The only reason you'd ever use b2b tst is because you're a troll

OnePunMan

Using JZ or LS

You could consider building a double TST when you recognize a field like below where you have a platform to place JZ (the first two columns marked green below) and already have the right side of the stack built.

Below is an example. In this example, the player chooses to follow up with a double TST after the TSD:

TSD to Double TST

You could also convert a TSD into a double TST. Look for this particular TSD shape where you have a platform to place an S/Z.

Examples:

STSD

Another safe way to build a double TST would be to convert it from a STSD. Refer to the STSD page to see when you would use this method.

Infinite TST

A TST looping technique often used in Ultra, commonly following the DT Cannon opener. More efficient compared to ST Stacking, which is another stacking technique used in Ultra.

Method discovered by Massi4h.

Here is an example of how you would use Infinite TST in Ultra. Here is another example that uses more freestyle.

Infinite TST does not always have to follow DT Cannon. You can start with a blank field (with S or Z) or anything that leaves the kind of overhang that is shown in the first picture. For example, you can set up an Infinite TST following Albatross.

Compare Infinite TST with C-Spin:

See Also / References

• Harddrop Wiki on Infinite TST

thanks to pwn_by_numbers for his help on the earlier versions this page