, rails and the angle
, and often spelled with "3" instead of "three") is a form of
, and one of the most popular and challenging
sports in the world.
The object of the
off both object balls and contact the
cushions at least 3 times before the last
is scored for each successful
. In most shots the
hits the object balls one time each, although hitting them any number of times is allowed as long as both are hit. The contacts between the
and the cushions may happen before and/or after hitting the first
doesn't have to contact 3 different cushions as long as they're contacted at least 3 times in total.