Derivation
It is very difficult to make a shot with a ball, if that ball is directly behind the eight ball.
Pool, also known as pocket billiards, is played on a retangular table with six pockets into which balls are driven (shot). There are fifteen colored balls, numbered one to fifteen, and a white cue ball. The cue ball is driven with the cue stick against one or more of the other balls knocking them into the pockets for a score. If the cue ball falls into the pocket, the player loses his turn and is penalized.
For More Details ►Bowling refers to a series of sports or leisure activities in which a player rolls or throws a bowling ball. In indoor bowling, the target is usually to knock over pins. In outdoor variations, the aim is usually to get the ball as close to a target ball as possible.
Shrink ▲It is very difficult to make a shot with a ball, if that ball is directly behind the eight ball.