4D trajectory.
What happens next?
A full answer key exists before the first cue. Every prompt is an unrelated opaque ID; your choices never branch the later questions, and nothing is revealed until the whole run is closed.
Route structure is the variable.
Both modes balance ↑ ↓ ← → exactly. Solved-route runs additionally contain a hidden self-crossing, so the same spatial point can occur at different time indices with different next moves.
Keep the two modes separate.
Each mode receives its own running total and one-sided 25% chance-model screen. Forty locked decisions is a review checkpoint, not permission to stop early or make a broad claim.
40 more locked decisions to the first review checkpoint. Do not interpret a running result as a claim.
40 more locked decisions to the first review checkpoint. Do not interpret a running result as a claim.
Trajectory ledger
No answer key has been opened yet.