The main objective of rugby is to obtain possession of the ball and score as many points as possible by carrying, passing, kicking and grounding the ball.
The game is started by a player kicking the ball from the 50m (halfway) line. The team in possession of the ball advances towards the try line by running forward and passing the ball from one player to another. The ball must be passed laterally or behind, never forward. The opposition team will try and prevent the team in possession from moving the ball down the field and scoring a try.
The opposition team is able to grab the ball-carrier and pull them to the ground. This is known as a tackle. The ball-carrier must then pass or release the ball allowing both teams to contest possession.
If the ball goes out of the field of play there will be a lineout to restart the game. When there is an infringement, the game will be restarted with a scrum, free kick or penalty kick depending on the severely of the infringement.