SZ Double Triple Attack, is a T-spin combo designed by player XaeL. This setup is essentially a T-Spin Double followed by a T-Spin Triple. A player utilizes the SZ ST stacking setup followed by an extra piece to create a T-spin triple. This opening is an effective alternative to fiddlesworth in newer games which nerf T-spin singles to the point that the fiddlesworth opening is sends much less garbage. This setup is especially useful when the beginning two pieces are S and Z.

This opening is effective for the following reasons:

• Especially useful for SZ starts, where no I piece is present for the 3 T-spin Double opening.
• Most of the time, when you start with SZ, you can do a Triple Double Attack. However, this requires foresight of pieces, to see whether a J or L comes first. The advantage of this setup is that as long as you have SZ at the start, it does not matter whether J or L come first. Hence it is beneficial when the player is slow at reading past the 3rd preview, or there are less than 4 previews available.
• Fiddlesworth can require a significant amount of softdropping. This alleviates it, with only T-spins using softdrops.
• In games where T-spin singles and T-spin triples are negated or less potent, this is an effective replacement.

A negative of this opening is a piece is soft-dropped under the S. In situations where there is no soft-drop due to different piece order, chances are a Triple Double Attack opening, or a Three T-Spin Double opening can be used instead.

After the setup

After the T-spin triple, a T-spin single remains. If the stack is reasonably high, you can build up further to unleash a large combo. Alternatively, you can do a STSD transfer.

Transfers

STSD

This transfer can only be done if there are two blocks above the overhang.

Alternatives

The following are alternatives when faced with SZ starts

Regular T-Spin Single

T-Spin Single-Triple-Single

SZ Cross

Triple-Double See: Empty Field Setups, SZT Core

Non Opening Examples

The following are examples for use when not at the beginning of the game:

Leaving a hole below S piece

In the following a cell is left empty in the bottom row and the T-Spin Triple becomes a T-Spin Double. The second bag's Z piece creates the overhang (instead of the first O piece) and the hole created in the first bag is uncovered after the second T-Spin. The player is in trouble if in second bag the T piece shows up before the Z piece in which case SZ Cross could work as an alternative.