SingleYou, or Single Double Perfect Clear (SDPC), is an opener that starts with a T-Spin Single resulting in a U-shaped valley. It is notable for having few dependencies (O before S, Z, or T) and many reliable continuations.
In all continuations, the first bag is stacked like so:
The routes differ from the second bag onward.
Perfect Clear
The original continuation, invented by Yuu. The term "SDPC" usually refers to this route.
By setting up a T-Spin Double as follows, one can achieve a high chance of an 8-line Perfect Clear.
With the help of softdrop, the second bag can always be placed like in the third picture above. The following pictures show some ways how a Perfect Clear can be achieved subsequently. There is at least one working PC solution for 97% of all third bags whereas 55% can result in a T-Spin (Single or Double) beforehand. The first 2 solutions have by far the highest chance of working: One of them will work for 75 % of all third bags whereas 52% can result in a T-Spin additionally.
Link to all solutions: Fumen
The other way to place the second bag (different O placement) offers an even better chance to get a Perfect Clear. The following pictures show the best ways how a Perfect Clear can be achieved subsequently. There is at least one working PC solution for 98.5 % of all third bags whereas 72 % can result in a T-Spin beforehand. There are 8 solutions where pieces are not split into 2 halves and they have the best chance of working: One of them will work for 88.5 % of all third bags whereas 66 % can result in a T-Spin additionally.
Mechanical TSD v2
The second bag is stacked as in the #Perfect Clear.
From here, Mechanical TSD v2 can be stacked on top.
Once sufficient height is achieved, the bottom T-Spin Single can be upgraded to a T-Spin Double.
Triple Double
Invented by Ecchou. This sends the same attack as Stickspin, but is simpler to build.
Second Bag
Third Bag
There are two ways to stack the third bag. The first is always possible, but the second results in a flatter stack.
If the first build is used, the center area must be filled in to complete the T-Spin Double.
See also
