Curling is an ice sport and a game of skill, precision and accuracy. It is played between two teams of four players each in which the aim of a team is to place its stones closer to the tee (the center of the house) than the closest stone of the opposing team. It is believed that the sport was originated in Scotland in the 16th century as the paintings by a Flemish artist Pieter Bruegel portrayed a similar activity being played on frozen ponds. The first rules of the game were drawn up in Scotland and adopted by the Grand Caledonian Club, formed in Edinburgh in 1838. In 1843, the club was renamed as the Royal Caledonian Curling Club (RCCC) with the permission of Queen Victoria and is still known by that name. The first world championships of the sport were held in Edinburgh in 1959 for men only (1979 for women) and it became a regular sport of Winter Olympics since 1998 for both men and women.
The playing area for curling is a rectangular ice sheet which is around 150 feet long and 16 ft. 5 inches wide. It consists of a circular scoring area called the "house" at each end of the sheet which consists of four concentric circles dissected by the center and the tee lines. The outermost circle has a radius of 6 feet, the next circle has 4 feet radius, the next one has a radius of 2 feet and the innermost circle called the tee has a radius of 6 inches. Rubber footholds called hacks are fixed on each side of the sheet behind the houses which helps the curler in pushing off when delivering the stone. The sheet is also marked with two hog lines at each end which is 21 feet from the center of the tee line and behind which the stone must be released. The back of the house is also marked with the back line at each end which is 6 feet from the center of the tee line.