Okay, I put up a page. We can continue the discussion over here. :)
Question: How would some of you try to unambiguously describe the Horse of
Xiangqi in Betza notation? nN is not perfect, because the Horse can be
blocked on the orthogonal but not the diagonal. It's a question that has
likely been solved, since the notation provides for things like p for the
cannon. But I have not run across the answer.