Under Construction
Old Freezer is a 5-bag loop with the pattern of TSM→TSD→TST→TSD→Perfect Clear. This setup is discovered and named by a Taiwanese player Octupus Tea. It is named after the cyan strip from the 4th bag remnant resembling the layer of frost in an old freezer.
First bag
Old Freezer works best with early J.
The setup rate is 75.79% (3820/5040) when counting both patterns and both orientations.
Second to fourth bag
These three bags can always be stacked like this.
The J and L in the second bag are interchangeable. One may need to wait for gravity for the S and Z piece in the third bag.
Fifth bag Perfect Clear (14 lines)
Minimal solutions
Solutions with Back-to-Back
One additional solution for potential T-Spin Double and/or Tetris.
Additional setups and continuations
First bag skimming pattern
There is one skimming pattern that result in the same remnants as the first bag default pattern after TSM.
The setup is always stackable if first bag TSM can be abandoned and the following pattern is included.