Quidditch involves several players. Each team has three chasers. They score goals with a volleyball called a quaffle. Each goal is 10 points. They run the ball down the field by passing or kicking it to teammates. They must get the quaffle past the keeper, who defends the goal hoops. Each team also has two beaters who use dodge balls called bludgers to disrupt the flow of the play. Finally there is the seeker whose job is to catch the snitch. The snitch is a tennis ball inside a yellow sock tucked into the waistband of the snitch runner. When the seeker catches the snitch, he earns 30 points for his team and ends the game. For more detailed directions and rules, check out the International Quidditch Association Rulebook.