ranks and files will sometimes border each other along a common edge.
This is common among non‐flat spaces; most multiplayer square‐cell boards have the same property (indeed some are effectively on cube surfaces, giving exactly the same effect seen here), as does the board of my Spherical Corner Chess.
This is common among non‐flat spaces; most multiplayer square‐cell boards have the same property (indeed some are effectively on cube surfaces, giving exactly the same effect seen here), as does the board of my Spherical Corner Chess.