Cue sports are a wide variety of games of skill played with a cue stick, which is used to strike billiard balls and thereby cause them to move around a cloth-covered table bounded by elastic bumpers known as cushions. Cue sports, a category of stick sports, may collectively be referred to as billiards, though this term has more specific connotations in some English dialects.
There are three major subdivisions of games within cue sports:
Stick sports are games in which a long stick-like device is essential to the sport. Often the stick is used to strike or catch a ball, puck or ring, but may be used for other purposes such as dislodging your opponent in jousting, a weapon in stick fighting or a prop in quidditch. Sticks are specialized for each sport, but may fall into broad categories such as bats, clubs, cues or mallets.
Eight-ball (also spelled 8-ball or eightball, and sometimes called solids and stripes, spots and stripes, bigs and smalls, big ones and little ones, or rarely highs and lows) is a discipline of pool played on a billiard table with six pockets, cue sticks, and sixteen billiard balls (a cue ball and fifteen object balls). The object balls include seven solid-colored balls numbered 1 through 7, seven striped balls numbered 9 through 15, and the black 8 ball. After the balls are scattered with a break shot, a player is assigned either the group of solid or striped balls once they have legally pocketed a ball from that group. The object of the game is to legally pocket the 8-ball in a "called" pocket, which can only be done after all of the balls from a player's assigned group have been cleared from the table.
The game is the most frequently played discipline of pool, and is often thought of as synonymous with "pool". The game has numerous variations, mostly regional. It is the second most played professional pool game, after nine-ball, and for the last several decades ahead of straight pool.
Nine-ball (sometimes written 9-ball) is a discipline of the cue sport pool. The game's origins are traceable to the 1920s in the United States. It is played on a rectangular billiard table with pockets at each of the four corners and in the middle of each long side. Using a cue stick, players must strike the white cue ball to pocket nine colored billiard balls, hitting them in ascending numerical order. An individual game (or rack) is won by the player pocketing the 9 ball. Matches are usually played as a race to a set number of racks, with the player who reaches the set number winning the match.
The game is currently governed by the World Pool-Billiard Association (WPA), with multiple regional tours. The most prestigious nine-ball tournaments are the WPA World Nine-ball Championship and the U.S. Open Nine-ball Championships. Notable 9-Ball players in the game include Luther Lassiter, Buddy Hall, Efren Reyes, Fedor Gorst, Earl Strickland and Shane Van Boening. The game is often associated with hustling and gambling, with tournaments often having a "buy-in" amount to become a participant. The sport has featured in popular culture, notably in the 1961 film The Hustler and its 1986 sequel The Color of Money.
Kaisa or karoliina is a cue sport mainly played in Finland. The game originated in Russia, where it is still played to some extent. Kaisa equipment is similar to Russian pyramid from the 68 mm (2+11⁄16 in) balls, small pockets barely large enough for a ball to enter, and the long and heavy cue sticks. Kaisa tables are usually 10 feet long, and thus 2 feet shorter than official tournament Russian pyramid tables, which are 12 feet long. It is a two-player or two-team game. As with many carom billiards games, both players have their own cue balls used to shoot at the other balls, and usually differentiated by one cue ball having a dot or other marking on it. In all, five balls are used: the yellow object ball (called the kaisa in Finnish), two red object balls, and the two white cue balls (each of which serves as an object ball for the opponent). The game is played to 60 points, in a rather elaborate scoring system, reminiscent of those used in snooker and English billiards, with points being awarded for various types of shots. Like both Russian and English billiards, which are also played on large pocket billiards tables, kaisa is a hybrid of carom and pocket billiards game styles. Kaisa is principally a recreational game, without professional players. However, the first kaisa world championship tournament was held in April 2010. Participants came from 33 countries, and the main tournament was held in Kotka. A Finnish player, Marko Rautiainen, won the championship title.