Circuit Breaker · Endless · Top score · All-time

• Trace the current from the MAINS down: it follows every solid wire, both ways through a splitter, one way through a switch (where its white arrow points) and nowhere past a dead end. Dashed lines are open contacts.

• Read from the top down: follow the current from the MAINS and stop at the first switch that sends it toward a hazard or away from the bulb. That switch is usually part of the fix.
• Lock it in as soon as you are sure: the fuse bonus pays for every bit of fuse left, but a wrong throw costs a fuse and your streak, which is worth far more.
• Decide before you tap: flipping a switch and back again loses the clean bonus, even when the panel lights.

All-time keeps each player’s best since the board opened. This week starts again every Monday at midnight New York time.

Equal scores share a place, and the run finished first is listed first.

A run records only your inputs. Our server plays them again with the same game code, and only a score the replay matches is verified. A person also checks the top 10 scores.

The board lists every player, guests under their generated name. Sign in with Google or Apple from a result to keep your scores and pick your own name. Bots, scripts and other automated or assisted play are not allowed (see our terms of use).