Gamushiro Stacking

Gamushiro Stacking (ガムシロ積み) is a T-Spin Opener first created by Mr. Goods. It is an opener that starts with a C-Spin. In the second bag, the T-Spin Triple will be done here and may lead to a Perfect Clear opportunity (99%) or another continuation. Sometimes, you will do a TSS or TSD before the PC. If you consider the mirrored version, it is always possible to stack this opener.

Second bag
In the second bag, you are will stack it in one of four ways. The first way is more preferred. In all cases, the Z piece can be placed in even though the S might be there already.

Third bag
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 you get an early T in the third bag, you may do a TSS immediately. Here are some solutions.

O on top of L
71 solutions; 9 are shown.

O on top of J
27 solutions; 7 are shown.

O on top of S
24 solutions; 5 are shown.

O on top of L

 * T-Spin Triple


 * Imperial Cross


 * Center 4-wide

O on top of J

 * Nil-cross


 * Trinity