digraph Syzygy {
  KRBvKQ -> KRBvK;
  KRBvKQ -> KQvKB;
  KRBvKQ -> KQvKR;
  KQvKR -> KRvK;
  KQvKR -> KQvK;
  KQvKB -> KBvK;
  KQvKB -> KQvK;
  KRBvK -> KBvK;
  KRBvK -> KRvK;
}