The object of badminton is to hit the birdie or shuttlecock over the net using a racquet and have it land in the designated court areas. If your opponent manages to return the birdie or shuttlecock then a rally occurs. If you win this rally i.e. force your opponent to hit the shuttlecock out or into the net then you win a point. You are required to win 21 points to win a set with most matches being best of 3 sets. Points can be won on either serve. District 13 and the Ontario Senior Games use nylon birdies. The Canadian Senior Games use feather shuttlecocks.