Larry Smith wrote on Fri, Jun 4, 2004 07:38 PM UTC:
I agree that Parton's restriction does make the checkmate much more
easier. But without it, there really is not a reduction in the potential
of checkmate.
Dropping this restriction actually brings the Kings themselves into the
end-game formulae. With the ability to pin the opposing King with a King
on the other field. There is also an increase possibility of stalemate,
if the player is not aware of this particular position against a lone
opposing King.
Now, I'm not advocating elimination of this restriction. But variant
play might include the lifting of this restriction.