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
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TOJ Core
(TKI signature)
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ITZ Core
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ZOT Core
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ZTI Core
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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
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Place SJ as shown
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Stack and create overhang
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LZ Variation
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TJ Variation
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LT Variation
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ZL Variation
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JS Variation
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TL Variation
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JT Variation
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Shallow Grave
T-Spin Double Replacements
T-Spin Triple
Imperial Cross
More Imperial Cross Setups
Fractal Cave