Tennis

Tennis is a racket sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to play the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball will not gain a point, while the opposite player will.

Tennis is an Olympic sport and is played at all levels of society and at all ages. The sport can be played by anyone who can hold a racket, including wheelchair users. The modern game of tennis originated in Birmingham, England, in the late 19th century as "lawn tennis". It had close connections both to various field ("lawn") games such as croquet and bowls as well as to the older racket sport of real tennis. During most of the 19th-century in fact, the term "tennis" referred to real tennis, not lawn tennis: for example, in Disraeli's novel Sybil (1845), Lord Eugene De Vere announces that he will "go down to Hampton Court and play tennis."

Tennis (band)

Tennis is an American indie pop band from Denver, Colorado, United States, made up of husband-and-wife duo Alaina Moore and Patrick Riley.

History

The couple met each other while studying philosophy in college, and started the band after they got back from an eight-month sailing expedition down the Eastern Atlantic Seaboard. Their songs document their experiences on the water. They took their name from a joke about Riley playing tennis in college. Prior to forming Tennis, Moore's earliest singing experience was in church choirs during her youth.

Their first releases, both in July 2010, were the "Baltimore" EP on the Underwater Peoples label and the "South Carolina" single on Fire Talk. Tennis released their first studio album, Cape Dory on Fat Possum Records in January 2011. The album, featured on NPR, was based on the couple's experiences during their sailing trip.

During their first tour, James Barone joined the band on drums.

The second Tennis album, Young & Old, was released on Fat Possum Records on February 14, 2012, produced by Patrick Carney of The Black Keys, preceded by the single "Origins", which was issued on Forest Family Records on December 6, 2011.

Tennis (paper game)

Tennis is an (abstract) strategic pencil and paper game for two players.

The game field consists of 4 fields and a centre line. These are called (-2,-1,0,1,2), with negative numbers belonging to player 1, positive to player 2. At start, the ball is at the centre line (0).

Both players start with the same initial number (e.g. 50 points). In each draw, both players choose a number, and the ball is moved towards the player with the smallest number. The number that was chosen reduces the points for the next draws.

The aim of the game is to move the ball beyond the second field of the opponent.

The game is described in.

Mathematical description

For a simple description, we include the numbers -3 and 3 to denote the ball being beyond the second field. This results in a playfield as (-3,-2,-1,0,1,2,3).

The draw of player i at time t will be denoted as , the ball is at time t in .

At start is and for both players is .

Each player chooses a whole number , with only if . The number reduces the points of this player ().