> aren’t those actually bishop-neighbors, not rook-neighbors? There are 2 grids, so it depends on your frame of reference. The node connections are oriented 90

> aren’t those actually bishop-neighbors, not rook-neighbors? There are 2 grids, so it depends on your frame of reference. The node connections are oriented 90 degrees to the shape of the node in the picture, which means rook neighbors is accurate relative to the nodes. The background is off by 45 degrees, so node connections relative to the background grid are diagonal, or bishop, moves.