KiCad's own DRC and ratsnest (via kicad-cli) scoring a routed board; no router scores itself.
How it looks
Real geometry: CORE3588 with every track, via and pour removed; dashed lines join each net's pads by the shortest tree, like KiCad's airwires
What a router gets: the left edge of CORE3588 (22 x 27 mm) with all copper stripped. Pads stay where Sam placed them; the dashed amber airwires are the connections to make (ground left out, a ground pour joins it).
1Camera plug P4.
2The module's board-to-board plug J1: two rows of pins, 0.4 mm apart.
Real geometry: CORE3588 copper, drawn from our board file (2D plan view)
What the referee checks: the same area with Sam's real routed copper. KiCad compares this against the rules and the netlist and counts what is missing and what is broken.