Fig: TJLS 2nd PC bag structure. 100% PC, no recovery necessary.

• ⭐ Minimal Solving Ideas
• ✅ Solve Priority

TJLS 2nd can be frequently reached from Jigsaw, among other 1st setups.
The standard setup 3p is good enough. However for high scoring games, following setup can usually be built instead.

TJLS Anti-PCO 3p (Hold L) 2nd has some daunting stats:

• 1188 unique solves
• 70 unique TSD solves (32 TSD minimals)
• 209 unique TSS+ solves (40 TSS+ minimals)
• 33 unique Tet solves (16 Tet minimals)
• 268 unique Save O solves (24 Save O minimals)
• etc.

How does one even go about learning something like that?

Due to the sheer volume of solves, we will not remember individual solves.
Instead we are going to break the problem down into smaller parts by using several solving ideas, which encompass a group of similar solves each
(admittedly compounded by a small number of useful solves that will cover a number of practical cases).

Anti-PCO 3p (Hold L) 2nd

Thankfully the setup itself is not difficult to solve (when you know what to look for).
It only has 6 minimals. We will not be listing those here because those include bad saves and can be cumbersome to use.
Instead we will show a slightly larger covering set utilising the solving ideas mentioned above.

Notably it also has some very good stats.

Covering Set (9)

Shown for reference.
Instead of memorising these, see the Solving Ideas section below.

Space divisions

Space divisions make finding solves simpler:

Heart + Vertical Box

Kaidan + Box

Box

All solves you need involve a box on the right side and either a T-spin setup or boxing off on the left side.
4x4 Box can be further broken down into Horizontal Box or Vertical Box, with I piece on either side, top or bottom.

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Solving Ideas

Extras (4)

These practical solves, which don't conform to space divisions lined up above, are an exception worth memorising.
These solves are tied for best save and scoring. Look for these first before going for regular solves.

⭐ Minimal Solving Ideas (3/5)

If you learn these three (five) ideas, you will always be able to solve this setup.
Scoring using just these ideas is already close to optimal, especially if you also use the extras shown above.

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Solve Priority

tl;dr Priority

Due to parity, TSD solves (or any solve with horizontal T) are guaranteed to be good save.

Save J is generally to be avoided due to low average score of J DPC.

1. Immediate score > Save
2. TS0+Tet > TSD > Tet > TSS > TS0 > just PC
3. Save O > Save S ~= Save I
• Save J moves you down two tiers.
  Avoid Save J unless the decision is between like TS0+Tet Save J and no extra score good save.

Scoring event comparison

When optimising score, the entire loop has to be taken into account.
Because this setup is followed up by DPC, Tet solve actually scores more than TSS solve over the loop thanks to charging b2b for extra 600 points on the subsequent TSD on DPC.

Compare:

TS0+Tet seems to score more on paper, but TS0+Tet solves always use the O piece in setup so it will never Save O.

DPC comparison

O DPC scores the most thanks to 2L chance. This slightly (by 85.71 points) reduces the average bonus from b2b. This swing is not significant enough.
When faced with a choice between TS0+Tet Save S and TSD Save O, you might as well choose Save O.

According to current research (as of June 2023), average DPC scores assuming optimal setups are as follows:

In practice, S DPC and I DPC are comparable in terms of score as the latter requires many setups to surpass the former on average. Points difference between the two is negligible while S DPC is easier to solve.
In practice, J DPC will be further behind good saves because optimising it would require a large number of outlandish setups.

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Changelog

2023-06-21
• Created TJLS 2nd PC page
• Added Minimal Solving Ideas
• Added Solve Priority