digraph Syzygy {
  KQRvKQ -> KQvKR;
  KQRvKQ -> KQRvK;
  KQRvKQ -> KQvKQ;
  KQvKQ -> KQvK;
  KQRvK -> KRvK;
  KQRvK -> KQvK;
  KQvKR -> KRvK;
  KQvKR -> KQvK;
}