Most sports have to change their rules and scoring systems once in a while to adapt to external changes or improve the quality of their sport. The driving force behind many changes has been an attempt to make the games more exciting and suitable for television broadcasting.
For example, in April 2009, the World Squash Federation changed the rules in squash so points are awarded in every rally (ball played), compared to the traditional rules in which players only could score a point in their own serve.