A practical noir workflow for logic-lattice mysteries: anchor what is certain, eliminate what is impossible, and commit without flinching.
Some mysteries hand you a story and ask what happened. Games in the Obra Dinn tradition — The Case of the Golden Idol, The Roottrees Are Dead, Chants of Sennaar — hand you a lattice instead: dozens of interlocking unknowns where every answer constrains its neighbours. Sixty souls, sixty fates, and a memento that only shows you frozen moments.
Players stall in these games for a predictable reason. They hunt direct evidence for every single answer, when the design never intended to provide it.
In a lattice mystery, roughly a third of the truth is shown, a third is inferred, and a third is simply what remains when everything else is spoken for.
The craft here is not observation alone. It is knowing which of the three thirds you are standing in, and using the right tool for each.
The Elimination Workflow
Five disciplines for solving lattice mysteries without brute-forcing or burning out.
Anchor the Certainties First
Every lattice has a handful of freebies: a name spoken aloud, a uniform with a rank, a face pointed at directly. These anchors are the load-bearing walls of the entire solution.
Sweep the whole case once before solving anything. Lock in only the identifications you could defend under oath, and mark everything else as open. Premature guesses poison the lattice, because every wrong anchor silently corrupts its neighbours.
Work the Categories, Not the Individuals
You rarely identify one sailor. You identify the Russians, then the topmen, then the gun crew — and the individual falls out of the intersection. Group membership is the strongest inference engine these games offer.
Keep a category grid: nationality, role, location, association. Each observation that fits a person into a group is worth more than it looks, because it constrains everyone else in that group too.
Let Elimination Do the Heavy Lifting
The final identifications in Obra Dinn are famously unprovable in isolation. They are correct only because every alternative has been consumed. This is not a flaw. It is the design's closing argument.
When you are down to a small pool of unknowns, stop looking for new evidence. Count what remains. If three names are left and three hammocks are unclaimed, the puzzle has moved from observation to bookkeeping. Do the bookkeeping.
Distinguish 'Unknown' from 'Undecidable'
Some answers are hidden until you find the right scene. Others are decidable right now with what you already hold — you simply haven't cross-referenced yet. Stalled players almost always misfile the second kind as the first.
Before re-exploring, run a desk pass: for each open unknown, ask whether any two facts already in your notes intersect on it. New evidence is expensive. Cross-reference is free. Spend the free currency first.
Commit at 'Probably', Verify in Batches
Obra Dinn confirms fates in threes — a deliberate mechanic that rewards committing to strong probabilities and lets verification convert them to certainties. Waiting for perfect proof on every entry is how a two-evening game becomes a two-week grind.
When a conclusion reaches 'clearly best remaining explanation', write it in. Group your confident answers with one or two probables, and let batch confirmation audit your reasoning. Treat each confirmed batch as feedback on how well-calibrated your 'probably' really is.
The Lattice Investigator's Checklist
- Have you completed a full sweep before locking any answers?
- Which of your identifications are anchors, and which are inferences riding on anchors?
- Are you maintaining a category grid, or trying to solve sixty individuals one at a time?
- For each stalled unknown: is it truly hidden, or merely un-cross-referenced?
- Has the remaining pool shrunk enough that elimination alone can finish it?
- Are you refusing to commit at 'probably' when the game's structure rewards it?
- When a batch confirms, do you review why your probables were right — or just move on?
- Are you still reasoning through the lattice, or guessing to make the counter move?
A lattice mystery does not ask you to witness everything.
It asks you to be honest about what you know, ruthless about what you can rule out,
and brave enough to write a name in ink.
The last truths are never found.
They are all that's left standing.
In this Society, we count what remains.