From Hard Drop - Tetris Wiki

Stitch is a skimming T-Spin Single opening setup. It can be continued with Back-to-Back T-Spin Double and has more than 99% PC chance at the third bag. The setup is found by players metallicLurker and Octupus Tea.

Contents 1 First bag 1.1 Building with twists 2 4-Line Perfect Clear 3 TSD into 8-line Perfect Clear 3.1 Main pattern 3.1.1 Solutions with T-Spin 3.2 Backup pattern 3.3 Additional pattern 1 3.4 Additional pattern 2 4 Additional setups and continuations 4.1 First bag skimming pattern 4.2 Back-to-Back continuations 4.3 Center 4-wide 5 See Also 6 External Links

First bag

Stitch has two 1st bag patterns leaving the same residue, and the setup rate is 84.6%.

The first pattern is always buildable with early S, Z and 180 rotations, and the second pattern resembles Outlogic SD.

Building with twists

Late L stacking

CCW and softdrop

180

CW

Late I stacking

CCW and softdrop

CCW

4-Line Perfect Clear

The chance for a 4-line Perfect Clear after the first bag is 11.43%.

The pieces left for the second Perfect Clear is OTSZ.

TSD into 8-line Perfect Clear

The backup pattern should be used when the sequence is O→L→S; otherwise, the main pattern is always applicable.

Main pattern

L→O

S→L

• 99.68% PC chance, listed solutions.

These 12 solutions are picked to minimize the chance of J/L DPC Setups.

The pieces saved for DPC Setups are shown under the solutions.

Save Z	Save Z	Save S	Save S	Save S	Save S
Save L	Save S	Save T	Save O	Save O	Save O

Solutions with T-Spin

2 Additional solutions for potential T-Spin Single.

The chance of getting extra TSS or TSD is 36.67% and 13.49%, respectively.

Save J

Save O

Backup pattern

• 99.25% PC chance, 11 minimal solutions.

Save S	Save O	Save Z	Save Z	Save O	Save O
Save I	Save S	Save Z	Save O	Save Z

Additional pattern 1

• 98.49% PC chance, 7 minimal solutions.

The chance of getting extra TSS or TSD is and 34.76% and 20.00%, respectively.

Save Z	Save I	Save I	Save O
Save J	Save Z	Save Z

Additional pattern 2

• 99.80% PC chance, 8 minimal solutions.

The chance of a Tetris PC is 29.29%.

Save S	Save S	Save Z	Save O
Save S	Save Z	Save I	Save Z

Additional setups and continuations

First bag skimming pattern

There are several skimming patterns resulting in the same remnants as the initial build.

The setup rate increases to 95.28% when including all skimming patterns.

Back-to-Back continuations

Only a handful of continuations are listed, and they may not cover all possible bags.

Center 4-wide

See Also

• Outlogic SD: The opener using the same initial build with different TSS direction, single second bag TSD pattern and slightly lower PC chance.
  • 4-Line Perfect Clear: More solves on the 4L PC with T and I on hold and/or in queue.
• Other TSS→TSD→PC openers
  • Last
  • SingleYou
  • Submarine

External Links

• Documentation of the opener on metallicLurcker's tech page