Gamushiro Stacking (ガムシロ積み) is a T-Spin opener created by Mr. Goods. It is a Triple Double Attack opener. In the first bag, only the J piece is required before the S. If the mirrored setup is considered, it is always possible to stack the first bag. After the T-Spin Triple from the second bag, it may lead to a Perfect Clear opportunity or other continuations.
Introduction
First Bag setup
You only need the J piece before S (L before Z in the mirrored setup). The L piece is kept on hold as it will be used along with the second bag.
Here is the first bag with all 7 pieces:
Second Bag
The second bag is always placed in one of these ways. The first 2 ways are the most desirable ways. The first 4 ways can result in a Perfect Clear.
Third Bag
Under construction
There are various continuations for the third bag.
Perfect Clear
This is usually the best continuation. In some cases a T-Spin Single or a T-Spin Double may be done beforehand. If one gets an early T in the third bag, they may do a TSS immediately.
- L → O (99.09% PC rate, 63 minimal solutions)
- J → O (96.94% PC rate, minimal solutions)
- S → O (86.59% PC rate, minimal solutions)
Other continuations
Perfect Clear after 10 or 14 lines
In this case, one can go for a Perfect Clear after 10 lines or 14 lines. There are some dependencies in the third bag: S before J, O before Z then I. At that point, one will have a chance to make a Perfect Clear after 10 lines. If this fails, then 14 lines is always possible, provided that S comes before Z in the fourth bag. The I, J, L and O pieces can be placed in any order. The solutions are the same as Riviclia's Pelican.
In case of the third form, below is another way, discovered by MalaiABUeditor. Perfect Clear is easier to spot here because there are fewer solutions. This one only needs S then J then O. The one above is also possible here.
Double Triple Cannon (2)
In case of the fourth form, one can make a Double Triple Cannon or a Double Triple Cannon 2. In the third bag, J should come before S and Z before O. In the fourth bag, if T comes late, then DT Cannon is possible. If T comes early then DT Cannon 2 is possible.
See also
External Links