John Smith wrote on Tue, Feb 10, 2009 08:38 PM EST:
No, you are wrong, Mr. Duke. The truly essential piece is my Gorilla, which
moves 4 King moves, capturing up to one, passing up to one piece. The
Falcon is obviously derived from this, as it only moves thrice, cannot
reverse, and cannot jump. The Knight is derived from it also, for it jumps
for the entire journey, whereas my Gorilla jumps for one step. The Rook and
Bishop extend its steps. It is moreover a superset because it can capture
on any step, rather than the zenith. If you could muster an iota of
intelligence, you could see this for yourself.