relay.tangleEight puzzles. No rush.

Two signals. One little tangle.

Flip shared switches. Move both shapes one beat at a time. Get each one home.

Relay Tangle board
Circle travelling
Diamond travelling
Beat 0

Shared switches

No beat passes when you flip.

Each letter changes every matching junction. Solid arrows show the next step.

A gentle nudge

No rush, no timer. Try a route, change your mind, follow the next idea.

Keyboard: A / B / C flip · Space advances · Z undoes · R restarts.

Help shape the next little tangle?

Optional play measurement helps us see which puzzles people finish and whether they return. The game works either way. What is measured.

How it works.

  1. Bring both shapes home. The orange circle goes to the circle ring; the purple diamond goes to the diamond outline.
  2. Flip a shared switch. A, B and C change every junction with that letter. The bold arrow is active; the dotted arrow is its other choice.
  3. Advance one beat. Both signals follow their current tile’s arrow by one space. Flip any switches between beats. Once home, a signal stays there.
  4. Make room for each other. Signals cannot occupy the same track space or swap places in a beat. Loops let one take the long way. Undo remembers your last 256 actions, including the move before a mistake.

Every puzzle is available from “All puzzles.” There are no timers, scores to chase, lives, sounds or sign-ins.

A, B and C flip switches; Z undoes; R restarts. Space advances when the board is focused. Tab, Enter and Space also work normally on controls. Shortcuts pause while a menu is open.

Follow the next idea.

Two learning boards, then six small tangles. Pick any board.

Progress & privacy.

Your finished puzzle names and most recent board are saved in this browser. Moves within an unfinished puzzle are not saved. Optional measurement is separate from your progress.

Clearing browser data also clears this progress. A copied link contains only a fixed puzzle name, never your progress.

Optional play measurement

Help us learn which puzzles people finish and whether they return. If you allow it, PostHog receives play milestones with a random browser ID. No move-by-move recording or session replay.

Off — no play measurement is sent.

Turning it off clears the measurement ID and stops new events. Events already delivered remain. This does not clear puzzle progress. Read the privacy details.

Same puzzle, new eyes.

Copy this fixed-level link. It does not include your progress.

Anyone with the link can try the same puzzle. Each person keeps their own progress.