digraph Syzygy {
  KBBBNvK -> KBBNvK;
  KBBBNvK -> KBBBvK;
  KBBBvK -> KBBvK;
  KBBvK -> KBvK;
  KBBNvK -> KBNvK;
  KBBNvK -> KBBvK;
  KBNvK -> KNvK;
  KBNvK -> KBvK;
}