Charles Gilman wrote on Sun, Jul 3, 2005 06:38 AM UTC:
Another interesting idea that came to me recently was an MD Cannon, which
can capture if there are an ODD number of intervening pieces (not
necessarily just one) of which the 2nd, 4th &c. must be enemy ones and
are
captured as well as the destination one. I imagine that this would work
best on a Very Big Board.