Visitor Masonry

First swap neighboring runes to clear all foundations and gather four alien cores within nine exchanges. Activate the circuit stage, then extend a wire from the lower-left source through all three relays. Avoid the two insulators and your own wire. Twelve lengths available; recover the last wire freely to rethink the route.

Tap controls, or Tab then Enter/Space. R restarts. Every action is turn-based; take time to plan.

Foundation clearing plus a separate alien-energy requirement; one construction site.