Beta DDT is an opening setup with the attack sequence of TSD→TSD→TST→Perfect Clear. The known best path yields a 95.04% chance of a 14-line Perfect Clear. The setup is discovered and named by a Taiwanese player Octupus Tea. It is named after being a variation on the BT Cannon shapes.

First to second bag

Beta DDT has two 1st and 2nd bag patterns leading to the same residue. The combined 1st bag setup rate with mirror is 78.10%, and the 2nd bags are always stackable in both patterns.

1st bag A

2nd bag A

1st bag B

2nd bag B

Third to fourth bag

These two bags are always stackable.

3rd bag

4th bag (interchangeable JLZ)

Fifth bag Perfect Clear (14 lines)

• 95.04% PC rate, 11 minimal solutions

Additional setups and continuations

Second bag BT Cannon

The setup rates are 63.33% for both patterns.

After bag 1A

After bag 1B

Second bag DDT alternative

The second and third bags in this pattern are also always stackable.

After bag 1A

After bag 1B

3rd bag

4th bag