[ Thanks to Steven J.
Vaughan-Nichols for this link. ]
“In chess, there is a tactical motif called an x-ray. In it, the
effect of an attacking piece is felt primarily not by the piece
that’s actively being attacked, but by the piece that is shielded
from the direct attack by the attacked piece.“In the release of Ubuntu 7.04, with its optional Sun Java
application server stack, the actively attacked piece is Red Hat
Enterprise Linux, but JBoss is the real target…”