Bank pool

Bank pool is a pool game that has as its most fundamental requirement that all scoring shots in the game must be made by a called ball off a and into a called pocket.
While the game has multiple variations, the predominant version through much of its history was played with a full fifteen-ball, of which the winning player was required to legally pocket eight balls. A shortened version of the game using nine balls of which the players must legally pocket five for the win, often called "nine-ball banks," gained popularity in the 1990s and 2000s and is the subject of international professional competition and televised matches.

Rules

Aim

The object of the game is to be the first player to five balls in any order.

Rack

The balls are racked in nine-ball formation, but in no particular order.
On the break shot, at least four balls must hit the rails else it is an illegal break. Any balls pocketed during the break do not count toward the score and will be spotted after the player's inning ends. Pocketing a ball on the break results in the player continuing to shoot.
On an illegal break, the opponent has the option of requesting a re-rack or accepting the table as-is and may begin shooting.

Play

The key rule is that all shots must be banked.
Bank pool is one of the "cleanest" pool games — no ; no ; and the object ball cannot hit another ball on the way to the pocket.

Fouls

The shooter "owes" the table a ball if they foul — a previously pocketed ball must be. Any ball pocketed on a is spotted in addition to the ball owed. If the cue ball is, it is a foul, and the cue ball must be behind the . Any balls that were sunk on that shot are spotted. If the shooter has not already legally pocketed a ball at the time of the foul, a ball is still owed, which must be spotted after the in which it was legally pocketed. If the shooter makes a legal bank shot and another ball goes in accidentally, it is not a foul, but that extra ball is spotted after the inning. It is also a foul if the shooter does not hit the object ball and drive it or the cue ball to a cushion or pocket the object ball. In many areas, fouling three times during successive turns means a loss of, but that rule may often be ignored in local amateur play. A stricter variant preferred by some is that even three non-consecutive fouls is a loss of game. Players typically make sure the rules are clear and agreed-upon before play begins, especially when gambling.