The Kaidan, or Stairs, T-Spin setup, discovered by Tetris DS player TCM-WC, is a prophecy T-Spin Double method that takes advantage of a step formation beside an empty column. After an overhang is created, a Z tetromino is platformed over the empty column and used as a base for the T-Spin Double. After performing the T-Spin Double, the empty column should be open again. The Kaidan setup is especially effective in games that reward a Back-to-Back bonus.
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General Tips[]
- Steps one to four are mandatory for the setup to work. The fourth step can often be incorporated through the tetromino used to create the overhang.
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* Rows one and two do not have to be complete for the setup to function.
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* The overhang and base are interchangeable in order of placement.
Overhang first |
Then base |
Base first |
Then overhang |
Setting Up the Stairs[]
Filling the Body[]
S-1 |
Z-1 |
T-1 |
Filling the Bottom Gap[]
Although there are seven unique situations, they are uncommon during play and are generally less preferred than the line clear method.
O-1 |
I-1 |
J-1 |
S-1 |
Z-1 |
T-1 |
T-2 |
Line Clearing the Edge[]
Line clearing is the most versatile method to prepare the Kaidan edge and is generally preferred and used more often than filling the gap. As opposed to the former, line clearing provides five unique situations, often encountered when skimming, with three where alternate tetrominoes may be used. It is important to note the three interchangeable situations (O-1 and S-1, J-1 and L-1, J-2 and L-2) as they provide for more flexibility.
O-1 |
I-1 |
J-1 |
J-2 |
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