Mechanics
The rules of the board: the graph, sight chains, capture, and the fixed order that runs after every move.
Turn order
After every move the engine runs the same seven steps in the same order; level data never changes it.
World model
A level is a graph of nodes and edges; tags carry behaviours like hiding, tolls and sight blockers.
Sight
Sight is defined by edge chains, not free geometry — so the player can build the same model the solver does.
Capture
There are two ways: contact and lethal sight. Not every gaze is lethal — the chaser’s only starts a pursuit.