Badminton is played as singles or doubles, with one player on each side in singles and two players on each side in doubles. The objective is to win rallies by causing the shuttlecock to land inside the opponents court or by forcing the opponent to commit a fault. Modern badminton normally uses rally point scoring, meaning that the side winning each rally receives one point regardless of which side served.
A standard game is normally played to 21 points, but a side must win by two points when the score reaches 20 all, subject to the rule limiting the game to 30 points. A match is normally the best of three games. Players change ends after the first game and after the second game when a third game is required, with additional end changes at the specified score during the deciding game. The court contains different service and boundary lines for singles and doubles, and the shuttle must cross the net and land within the applicable court area. These rules create the basic scoring and court framework within which rallies occur.
The serve begins every rally and must be delivered diagonally into the appropriate service court. The server and receiver stand within their respective service courts without touching the boundary lines during the service action, and the shuttle must be struck according to the current laws governing the service. The server serves from the right service court when the servers score is even and from the left service court when the servers score is odd.
In doubles, the service court and receiving responsibilities depend on the score and which side has the service. The serve must travel across the net into the diagonally opposite service area. A serve that lands outside the correct area, fails to cross the net or violates another service requirement results in a fault. The service is strategically important because it begins every rally and can immediately influence the receivers options. Players use short serves, flick serves and, in appropriate formats, variations designed to prevent the receiver from predicting the next shot.
During a rally, players must strike the shuttle before it touches the ground. Unlike tennis, badminton does not allow the shuttle to bounce and remain in play. A legal return must send the shuttle over the net and into the opponents court or otherwise create a situation covered by the laws.
A player loses the rally if the shuttle lands outside the opponents court, fails to pass over the net, touches the player or the players clothing in an illegal manner, or if the player commits another fault. Players must not deliberately carry or sling the shuttle on the racket, and the racket cannot make multiple separate contacts with the shuttle as an intentional double hit.
The shuttle can sometimes touch the net during a legal exchange and continue into the opponents court without automatically ending the rally. The key principle is that the shuttle remains live until a fault, landing, obstruction or other rule specified by the laws ends the rally.
Court boundaries differ between singles and doubles. Singles uses a narrower court because the outer side lines are not part of the singles playing width, while doubles uses the full width during ordinary rallies. The back boundary is also treated differently during the service because the doubles service court is shorter than the full doubles court. After the service has been returned, the appropriate full playing boundaries apply according to whether the match is singles or doubles.
Players therefore need to understand that the lines have different meanings depending on the phase of play and match format. A shuttle landing on a line is considered in because the boundary line forms part of the court area it defines. Accurate line calling is essential because the shuttle is small and can travel extremely quickly. In professional competition, electronic line calling and instant review systems may assist officials, while lower level matches often rely on line judges or players themselves.
Faults are central to badminton rules. A fault can occur when a player serves incorrectly, when the shuttle lands outside the court, when a player or racket touches the net during play in a prohibited manner, when the shuttle is struck incorrectly, or when another rule concerning the rally is broken.
A player cannot invade the opponents court with the racket or body in a way that interferes with the opponent, although the laws contain precise provisions concerning follow through and permitted movements. A player may not deliberately distract an opponent through shouting, gestures or other behaviour intended to interfere with the opponents concentration. The service rules also contain specific requirements about the movement and position of the server and receiver. Because badminton is fast, umpires must distinguish accidental contact, legal follow through and genuine infringements.
The net is a central part of the rules and separates the two playing areas. The shuttle must pass over the net during an ordinary legal exchange. If it hits the net but still crosses and lands in the correct area, play can continue. A shuttle that becomes caught on the net or fails to cross can end the rally according to the circumstances.
The net also creates tactical opportunities because players can hit delicate shots that pass very close to its upper edge and fall rapidly into the front court. However, players must not touch the net with their body or racket during play in a manner prohibited by the laws. Net play requires precision because small differences in racket angle and shuttle height can determine whether a shot clears the tape or lands on the opponents side.
Doubles introduces additional rules concerning service order, positioning and player rotation. The pair that wins a rally receives the point and, when entitled to serve, serves from the appropriate side determined by the score. The two partners do not have to alternate every stroke during an ordinary rally. Either player can hit the shuttle from any legal position on their side of the court, although tactical formations determine who normally takes particular shots.
Partners commonly communicate through movement, verbal cues and agreed tactical patterns. During service, however, the designated server and receiver must occupy the correct service courts. After the serve is returned, players can move freely within their side of the court. These rules allow doubles to become a highly dynamic game involving rapid exchanges, interceptions, flat drives and coordinated attacking formations.
The rules collectively create a sport in which service, movement, court geometry and rally execution are tightly connected. A player must begin with a legal diagonal serve, respond to the opponents shots without allowing the shuttle to land, remain within the appropriate court boundaries and avoid faults involving the net, racket, body, service action or obstruction. Rally point scoring means every rally has direct scoring significance, so defensive and attacking decisions both matter.
The basic rules are simple enough for recreational play but become considerably more detailed at competitive level because service legality, court positioning, line calls, intervals, misconduct, substitutions in team events and umpiring procedures require precise interpretation. The most important practical distinction is that badminton is a non bouncing shuttle sport: the shuttle must normally be struck before it lands, and every legal exchange can immediately change the score.
