A curling game is made up of 8 or 10 ends (like innings). The curling team consists of four players. Curling teams are traditionally identified by the last name of the team "Skip"" (the captain). An end consists of each team member shooting (delivering) two rocks (curling stones), alternating with the team members of the competing team.
A 12-foot circle (the house) is the scoring area. For each stone closer to the center of the circles than any of the opponent's stones, one point is scored. The team scoring shoots first in the next end, giving the opponent the "hammer", or last shot of that end. The sheet of ice (playing surface) is 15'71/2" wide and 146 feet long, set up to accommodate play in both directions.
All four players shoot two rocks, beginning with the "Lead" player. The "Second" shoots next followed by the "Vice Skip"." The Skip shoots the last rocks and directs the play of the others." The skip decides on shot selection and signals the players." The shooter must be accurate in aim, weight (velocity in delivery) and giving the rock the correct "handle" (or curl).
Each running stone curls (curves) as it proceeds down the ice depending on the twist it was given during delivery. The curl allows for better control of the stone. Team members sprint along the path of the stone and sweep with curling brooms to control the curl and the speed. Sweeping slightly melts the ice, which reduces the friction between the running stone and the ice surface. The result is the stone will curl less and slide farther.