Rules for Olympic Curling – Scoring
The competition begins with two teams at a time who compete on the ice. The curling teams push 19.1kg stones while they are aiming for a series of rings. The object of curling is for the stones to reach as close to the middle of the rings as possible. Every member of the 4 person curling teams will throw (slide) 2 stones in each of the 10 ends that comprise a game. The curling part of curling is that 2 members of each team sweep the ice in front of the stone to try to direct where it goes and how fast it gets there. The team with the most stones near the rings’ center wins the curling match.
Two teams of four players take turns to slide heavy, polished granite stones across the ice towards the house (a circular target marked on the ice). The purpose is to complete each end (delivery of eight stones for each team) with the team’s stones closer to the centre of the house than the other team’s stones.
Two sweepers with brooms or brushes accompany each stone and use stopwatches and their best judgment, along with direction from their teammates, to help direct the stones to their resting place, but without touching the stones.
On the sheet, a 12-foot (3.7 m) wide set of concentric rings, called the house, is placed (painted or by laying down vinyl rings) near each end of the rink. The centre of the house, known as the button, is marked by the junction of two lines that divide the house into quarters. The two lines are the centre line, which is drawn lengthwise down the centre of the sheet, and the tee line, drawn 16 feet (4.9 m) from the backboard and parallel to it. Two other lines—the hog lines—are drawn parallel to each backboard and 37 feet (11 m) from them.
The rings that surround the button are defined by their diameter as the four-foot, eight-foot, and twelve-foot rings. They are usually distinguished by colour. The inner rings are merely a visual aid for judging which stone is closer to the centre; they do not affect scoring. However, a stone that is not at least touching the outside of the 12-foot (3.7 m) ring (i.e., more than 6 feet (1.8 m) from the centre) is not in the house and therefore does not score (see below).
After both teams have delivered eight stones, the team with the stone closest to the button is awarded one point for each of its own stones that is closer than the opponent’s closest stone.
Stones that are not in the house (further from the centre than the outer edge of the 12-foot (3.7 m) ring) do not score even if no opponent’s stone is closer. A stone is considered in the house if any portion of its edge is over any portion of the 12-foot (3.7 m) ring.
Since the bottom of the stone is rounded, a stone just barely in the house will not have any actual contact with the ring, which will pass under the rounded edge of the stone, but it still counts. This type of stone is known as a “biter”.