Glitter Brooch

Glitter Brooch is a T-Spin Double opener by Agent RO.

First Bag

There are 3 requirements in the first bag. From left to right, you need an L before Z, an I before S and a J before O.

Second Bag and later

General stacks

The second bag is confirmed with diagrams 2 to 4. Diagram 1 is additional, but it is shown first because it is the most ideal form when you want to make a Perfect Clear, another T-Spin Double or use LST stacking in the third bag.

Perfect Clear after 6 lines

The second bag can be stacked in the following ways resulting in a T-Spin Double and giving a chance for a Perfect Clear after 6 lines cleared in total. If a piece is split into 2 parts in a diagram, it means that the piece must be inserted after the T-Spin line clear. Usually, the Perfect Clear is completed with an O or I piece coming first or second in the third bag. If a diagram contains less than 7 pieces, it means that the missing piece can be kept on hold while filling the empty cells with the first 2 pieces of the third bag.

There are two solutions for the fifth diagram.

Perfect Clear after 8 lines

• S → Z (J on hold, 98.93% PC rate, 42 minimal solutions): This is the most ideal way to get a Perfect Clear in the third bag overall.

• S → Z and J → O (94.17% PC rate, 29 minimal solutions): This is the most ideal way to get a Perfect Clear in the third bag by placing all 7 pieces in the second bag.

PC after 8 lines (Confirmed)

• S → Z / Z → O (50.75% PC rate, 10 minimal solutions)

If you cannot make a Perfect Clear, you can make a T-Spin Double, in most cases, in one of these two ways. If possible, you may also make a 12-line Perfect Clear setup.

• O → Z (41.27% PC rate, 3 solutions)

If you cannot make a Perfect Clear, you can follow it up with LST stacking. If possible, you may make a 12-line Perfect Clear setup (not shown).

Late O Tetromino

If your O piece comes late, you can place it after the T-Spin Double as shown in the diagrams below.

The final shape is the same as TKI 3 Flat Top. You have many ways of stacking the second bag, here are some ways you can continue with:

• 6-line Perfect Clear: You need an O before L. After the T-Spin Double, use the held J and the third bag's I piece.

• 8-line Perfect Clear: This example has a 41.27% PC rate.

• Mechanical TSD

• LST Stacking: This continuation is entirely impromptu after the second bag.

See Also

• Crown TSD - another T-Spin Double opener by the author of Glitter Brooch
• TKI 3 Opening
• Perfect DT
• Ajanba TSD