Curling when all eight rocks from each team have been delivered, a total of sixteen stones. If the teams are tied at the end of the game, play continues for as many ends as may be required to break the tie. The winner is the team with the highest score after all ends have been completed (see Scoring below). A game may be conceded if considered unwinnable. International competitive games are generally ten ends, so most of the national championships that send a representative to the World Championships or Olympics also play ten ends. However, there is a movement on the
United States Curling Association and played world-wide, but especially in Poland where it originated as far the 1600s by ice-fisherman. It's popularity is mostly spread about Canada and Western Europe. More recently has it become more popular in America, due to the USA men's curling team winning gold in 2018. The granite for the stones comes from two sources: Ailsa Craig, an island off the Ayrshire coast of Scotland, and the Trefor Granite Quarry in Wales. These sites are chosen because of their inexpensive and abundant source of the raw material. USA Curling member clubs are organized into eleven regional curling associations. The United