●Switchboard
LIGHTS OUT
Flip switches to route calls so every line connects to its intended extension.
Old-school switchboard, modern logic—route with care to keep the office humming. Tapping a light flips it and its four neighbors. Best known solve: 8 taps.
HOW TO PLAY
Turn every light off. Tapping a square flips that light plus the lights directly above, below, left, and right; edge and corner squares simply have fewer neighbors. A second tap on the same square cancels the first. Plan the pattern of taps so the whole board ends dark.
FINISHED EXAMPLEA solved Switchboard puzzle
MediumThis is a separate sample puzzle — not today's answer.
Medium