Curling team is composed of four members. Each player delivers a stone weighing about twenty kilograms one by one toward house-a circle of 3.66 meters across-which lies forty meters ahead. First the Lead goes, next the Second, then the Third, and finally the Skip-the leader of the team-goes. Each player throws a stone alternately between teams twice. After all throws are completed, only one team, which has a stone closer to the center of each circle, can score. This set of throws is called an end, and ten ends make a game. There are countless pebbles on the ice. When a stone is delivered, two players sweep the ice just in front of the sliding stone with a brush to melt the pebbles, which reduces friction and enables the stone to go farther and straighter. Seemingly it appears humorous, but in fact, it is a very intelligent and active sport. A team can concede a match if it believes it is too far behind in points to catch up.