Number One is a single bag opener discovered by player Riviclia that results in a platform T-Spin Double. Thereby, the first T piece is spun into a vertical position like in STSD which makes it different from most other platform openers. It has quite some dependencies in the first bag (L after O, Z after S, J after I) but despite of its look it is a really good opener if applicable.
Basic Setup
After the T-Spin Double
There is a single floating mino in row 2 located on the right side. However, with SRS spins it is possible to fill the area beneath it, and prepare a T-Spin Double as if the setup was just a regular STSD. Note that in diagram 3 J piece must be spun 2 times to reach the desired location.
Some advanced techniques:
Perfect Clear continuations
6-line PC
If one can stack the right side like in the leftmost diagram, there may be a chance for a Perfect Clear after 6 lines. Sometimes, one does a TSS before the PC. There is no way to get a PC with a TSD. First invented by MalaiABUeditor.
If one gets an early I in their third bag, the below stack may work, but has several piece dependencies, so the above is better.
TST TSD Perfect Clear
The first continuation looks like a T-Spin Triple setup but with an empty cell in row 2. So it just results in a T-Spin Double and the empty cell can be used to prepare another T-Spin. This continuation can be reached by spinning the J piece beneath the floating mino whereas there are 2 different paths; one where J is placed horizontally (diagram 3) and one where J is placed vertically (diagram 2).
If one decides not to make a Perfect Clear, they can convert the remains to a T-Spin Triple or Imperial Cross.
Imperial Cross Perfect Clear
The second continuation involves building an Imperial Cross with the remains of the STSD. There are 2 different paths again; one involving an L-Spin (diagram 3) and the other involving a Z-Spin (diagram 2).
Again, if one decides not to make a Perfect Clear, they can convert the incomplete TSD to a T-Spin Triple or Imperial Cross.
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Path 3
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T-Spin Triple
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Imperial Cross
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Path 4
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T-Spin Triple
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Imperial Cross
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After 14 lines
When it comes to 14 lines, there is no definite way. Below is an example, with three Imperial Crosses.
See also
External Links
