TKI 3 Opening

The TKI 3 opening (Japanese 開幕TSD) is a setup invented by Tetris DS player TKI.

With an I tetromino early in the first bag, the player can try using the basic TKI-3 Opener. Given the right pieces, it allows for three T-Spin Doubles and a T-Spin Triple to finish. This is a good setup since it uses all pieces in a good balance, as well as not wasting a T.

Basically, the I piece comes before Z. The J piece can be placed on O vertically, on S and O horizontally or upside down on Z (there is an alternative way). Furthermore, if the J piece comes early, there is a variant the player can use. Throughout these, however, the basic setup remains the same.

Regular TKI 3 base

Castle Top

Fonzie

Flat Top

Early J variant

Regular TKI 3

Castle Top variation

• TKI 3 TSD Opening

• Imperial Cross: If you can stack like the fourth diagram, you may get a Perfect Clear opportunity (89.68% PC rate).

• Perfect Clear after 6 lines (D Parfait)

O

T

Z

S

I

• Perfect Clear after 6 lines (DD Parfait)

Fonzie variation

• Mechanical TSD

• Perfect Clear after 6 lines (DD Parfait): The second bag can be stacked in the following ways resulting in a T-Spin Single or Double and giving a chance for a Perfect Clear after 6 lines cleared in total.

Flat Top variation

This way involves placing the J piece upside down on top of the Z piece (there is another way as shown in the first diagram).

• LST Stacking: You have to improvise from the second bag onwards.

• ST Stacking

• Double Triple Cannon

• Super T-Spin Double

• Mechanical TSD: In this case, the player can choose to make another T-Spin Double or a Perfect Clear (71.67%).

• Imperial Cross: If you can stack like the second diagram, you may get a Perfect Clear opportunity (89.68% PC rate).

• Perfect Clear after 6 lines (DD Parfait): 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. Usually, the Perfect Clear is completed with an I or S piece coming first or second in the third bag.

• Perfect Clear after 8 lines (Yack's PC): You can often stack the second bag this way. In the first shape, note that you can spin the L after placing the J.

After this, you have a 68.77% chance to PC. This is the most common solve, but I suggest you to check all the solutions on this fumen[1]. Note that if you place the Z piece first, it climbs up to 88.33%.

• Perfect Clear after 8 lines: The second bag can be stacked in a way that clears a T-Spin Double and prepares a Perfect Clear after 8 cleared lines in total. For this example, the Perfect Clear rate is 41.27%. This example is one of the easiest ways to memorize.

• Perfect Clear after 12 lines: This example uses early J and L pieces in the second bag.

• Kaidan: Kaidan continuation with a small PC chance, can be followed by S4W.

• MCD TKI: Center four wide continuation :

Dingle variation

This is the latest variant, discovered by Agent RO in April 2021. This one places the J piece after the T-Spin Double, on the valley where the T-Spin Double was.

• Perfect Clear after 6 lines (DD Parfait): The second bag is usually stacked like this, depending on the placement of the JSL block. The O piece is required to precede I.

• Perfect Clear after 8 lines: Some ways require placing the remaining piece on top of the T-Spin Double. For this example, the Perfect Clear rate is 75.08%.

• Perfect Clear after 12 lines

Early J setup

If the J piece comes early, along with the I piece, the player can use this setup.

Continuations

• LST Stacking

• Perfect Clear after 6 lines (D Parfait): The last two diagrams will work if O or T come first or second in the third bag.

• Perfect Clear after 6 lines (DD Parfait)

• Perfect Clear after 8 lines: For this example, the Perfect Clear rate is 93.10%.

• Perfect Clear after 12 lines

Perfect Clear

Main article: TKI 3 Perfect Clear

See also

• Perfect DT - a similar opener that can continue with a T-Spin Triple
• ajanba TSD - another opener that has numerous continuations
• Crown TSD - another opener that has the same piece dependencies of the Early J setup
• Glitter Brooch - another opener that can be assembled like the Flat Top variant