STSD

Short for Super T-Spin Double. This setup yields 2 T-Spin Doubles.

Building STSDs

Using J/L

Most STSDs are built by recognizing a 3-column, 3-row empty space and then placing a J/L in it.

The J and L combination shown in the first picture below is the most common way to build it because you just have to check if J and L is in your queue, but the overhang can be built in different ways.

You can build STSDs over existing Tetris columns:

STSD can be used as a recovery technique when you misdrop your J/L:

Using S/Z

Using S/Z requires taking a closer look at your next pieces because you need to place another mino on top of S/Z to complete your setup.

Examples:

Boomerang

You can build STSDs over open columns long as you have blocks indicated as green for your base:

However, you can salvage the above field by spinning in an L or a J depending on your setup. This technique is called Boomerang.

Note: One way to fix the bad overhang above is to build a TD

Trinity

An STSD stacked on top of a TSD. There are two forms. Trinities are often converted from a TSD when you don't anticipate getting a T piece soon.

Form 1

Form 2

This form is a less common way to build Trinity but is equally as useful.

STSD to Double TST

If you feel safe delaying your attack for one bag, converting the second TSD into a double TST would be a good way to spike your opponent. Works best when you have already stacked up the right part. This opportunity most commonly arises when you use S as the overhang.

Some examples:

Similarly, the second TSD can be converted into a TST.

DT STSD

3連TSD. A setup that looks similar to DT Cannon. However, this setup forms an STSD after the first TSD. As its Japanese name implies, this setup yields 3 TSDs.

Refer to the DT Cannon page to learn more about this setup.

BT STSD

A setup that looks similar to BT Cannon. However, this setup forms an STSD after the first TSD. Like DT STSD, this setup yields 3 TSDs.

Refer to the BT Cannon page to learn more about this setup.

STSD Chaining

STSDs can be stacked on top of one another. Not very practical to use in a real game unless you somehow get more than 4 Ts in a row (impossible).

As an aside, these patterns can be used to create baseless STSDs.

Baseless STSDs can be a way to fix a TSD with a bad overhang:

King Crimson

キングクリムゾン. King Crimson is a TST built on top of an STSD. Seldomly used.

This technique would be one way to fix a field like the third picture below formed after a TST like the one shown in the first picture below. Building a King Crimson, in this case, would not be recommended because you would be using a lot of Ts on your stack while building a setup that will use 3 Ts:

A better way would be to fix the above field would be sliding in an L.

Advanced STSD

Donation for the 1st TSD

The lines cleared in the first TSD are marked yellow, and the lines cleared in the second TSD are marked orange. Because blocks in the second TSD can be filled in later, you can incorporate donation techniques for the first TSD.

Examples:

Donation STSD

Once you become familiar with the lines that the STSD itself clears, you can consider donating with STSD as a whole. Some examples:

See Also / References

• 短足と眼鏡のゲーム雑記 on STSD
• Tetrisch on STSD
• Harddrop Wiki on STSD, Trinity, and King Crimson
• テトリス開幕テンプレWiki on King Crimson