About
A small puzzle, made to be finished.
Quarturn is a circuit puzzle in the tradition of NetWalk and Pipes, built as a web app you can install. Every board is a scrambled tree of wires; you rotate tiles a quarter turn at a time until power from the source reaches every bulb. There is a shared board every day, a leaderboard, streaks, par, and challenge links. There are no ads, no energy timers and nothing to buy.
Your data
- You can play without an account. A private guest profile is created on your first move so best times and streaks persist.
- Linking Google keeps your profile across devices. Signing out of a guest profile deletes it, and its data, permanently.
- What is stored: best times, solved boards, and daily leaderboard entries (a display name, time and moves). Nothing else.
How it is built
A React + TypeScript app on Firebase (Hosting, Auth, Firestore, Functions) with App Check protecting the backend. Boards are generated from a seed with a randomised spanning tree, so a link always reproduces the same puzzle. See the changelog for what changed recently.