Pick any puzzle. Bigger boards take longer. Solves don't affect your daily streak.
How to play
Route current from sources through wires to sinks. At every branch, the current divides evenly between the outgoing wires — so a 24 splitting two ways gives 12 each, and if one of those 12s splits again you get 12 / 6 / 6.
Currents flowing back together add. Wires that dead-end into nothing waste their current — make sure every branch leads to a sink.
Wires cycle when tapped:
Off
On — current flows
Maybe-on (note)
Maybe-off (note)
Solve when every sink receives exactly its target.
Right-click (or long-press) cycles backward. New puzzle daily.