Triple Double Attack, sometimes referred to as Triple-Double, C-Spin, or just plainly TD, is a T-Spin combo that consists of a T-Spin Triple followed by a T-Spin Double. A player performs a T-Spin Triple that leads into a T-Spin Double.

When referring to the term "TKI" or "TKI積み" (TKI setup), Japanese players always mean the TD attack setup, while western players mean the TKI 3 Opening.

Empty Field Setups

The C-Spin

Empty field Triple-Double setups are also known as C-Spins. This name is given because of the "C" shape that is formed.

SZT Core

TOJ Core (TKI signature)

ITZ Core

ZOT Core

ZTI Core

Situational Setups

Notch

The notch is the most common Triple Double attack that is present in multiplayer. Also, Triple Double is a good way to deal with a cell on top of a garbage hole. The two basic cases are the following:

Case 1 J overhang and L notch

Case 2: Z/S overhang and L notch

Both cases have appropriate mirrors.

Other Cases

Garbage Hole and Notch

Garbage Manipulation

302

200

002

101

Cuts

Place SJ as shown

Stack and create overhang

LZ Variation

TJ Variation

LT Variation

ZL Variation

JS Variation

TL Variation

JT Variation

Shallow Grave

T-Spin Double Replacements

T-Spin Triple

Imperial Cross

More Imperial Cross Setups

Fractal Cave