'Here is a proposed general castling rule' ... this is very good in its
way, but the real question is whether we want rule zero to get so big and
detailed. I'm not so sure, undecided, iffy, on the fence.
Rule Zero should be considered community property. It's not my personal
file or project; I kicked it off because we needed it, but from now on it
should be maintained and updated by consensus of the chess variant
community.