digraph Syzygy {
  KQBNvK -> KBNvK;
  KQBNvK -> KQNvK;
  KQBNvK -> KQBvK;
  KQBvK -> KBvK;
  KQBvK -> KQvK;
  KQNvK -> KNvK;
  KQNvK -> KQvK;
  KBNvK -> KNvK;
  KBNvK -> KBvK;
}