Fast DT

Fast DT (ファーストDT) is a Double Triple opener based on first bag TSD, created by yuu. This opener is remarkable for having the highest chance (73.33%) of building TST after TSD in the first bag.

First Bag

It has the same piece placement and dependencies with Castle Top TKI but with OL shifted to right.

Second Bags

Route 1

Route 2

Route 1

Thrid Bag

This shape is not always possible to build (Z>J & O>S|Z), but it has clear residue and can be continued with TST and potential 14 line Perfect Clear.

Fourth Bag - A

This can be used when L piece comes sooner than O.

It leads to a 98.77% PC chance field with 5 minimal solutions.

66.67%

36.67%

28.89%, potential TSS

18.89%

8.89%, potential TSS

You can also continue with this if J comes faster than O.

TSD, J>O

TST, always possible to build

Fourth Bag - B

This can be built when O comes faster than J and L.

O>J&L

This is also possible, but it is usually better to build variation A.

There is 66.67% Perfect Clear chance, with the only solution being the first solution of variation A.

It can be continued with various TSD setups.

Hold O or place O on L

J>L

L>J, O>Z

A Switchback setup can also be built.

always possible with 180°

residue

OSZ stairs

OSZ stairs

residue

compromise of OSZ stairs fail

You can build an interchangable LOJI box or freestyle LOJI.

The L in the fifth bag can be spinned in this way:

softdrop L

rotate CW

rotate 180

rotate CCW

harddrop L

See Also

• Perfect DT - A similar opener that starts with DT cannon without wasting T pieces

External links

• yuu's introduction of Fast DT