Scoring systems vary for different
competitions.
It is usually the first player to
reach 21 points, or the highest scorer after 18 or 21 ends.
Another system used is "set
play". For example, the first to reach seven points is awarded a set, with
the match played best-of-five sets.
The matches at the Commonwealth Games
were best of three sets.
Each set was won by the highest
scorer after nine ends and, if a third set was required, a tie-break was
decided over three extra ends.
This system is based on winning ends,
not total number of points.