Trunk Line
Ping the hidden network, trace every line
Rules & about Trunk Line
A daily deduction puzzle: three hidden networks every day, the same for everyone. Five stations sit behind a switchboard, wired together by one random tree — four lines connecting all five, hidden. Ping any two stations and the only thing you learn is how many hops separate them along the hidden wiring, never which stations the line runs through. Narrow the four true lines down from a handful of pings, mark them, and check your answer. Every ping costs a point, so trace it in as few as the par, then share your result without spoiling the network. Missed a day? Every earlier day stays playable.
- The game opens on today's three lines: tap one to start. The tabs above the board, or the keys 1, 2 and 3, switch between Line 1, 2 and 3 — three independent daily networks, same rules, same difficulty.
- Tap any two stations to ping them. The network answers with one number: how many hops separate them along the hidden wiring — never which stations the path runs through. One hop is a direct line, and the game marks it for you; asking the same pair again is free.
- Tap Mark (or press M) to switch the same two taps into marking a line you worked out without pinging it; tap the same pair again to unmark it, and Ping to go back to measuring. Marks cost nothing.
- Press Check (or K) once all four lines are marked. A wrong guess costs 2.
- Every new ping costs 1. Spend no more than the par, which is what the portal's own solver needed for that day's specific hidden network, for a star.
- With a keyboard: Q, W, E, D and F select stations A through E, or arrow keys move a cursor and Enter selects it. M switches mode, K checks, X clears your marks, R replays a solved network for practice.
- Press Share (or C) to copy a spoiler-free result, and come back after midnight for the next three.
- Missed a day? The arrows beside the day on the title screen (or the comma and period keys) open every earlier day. Those do not count toward your streak.
Trouble with the frame? Open Trunk Line on its own page. Full walkthrough with a worked example.
