While living in Canada, I took several opportunities to go curling with some buddies.

Curling is a sport in which players slide stones across a sheet of ice towards a target area. It is related to bowls, boule and shuffleboard.

Two teams, each of four players, take turns sliding heavy, polished granite stones across the ice curling sheet towards the house, a circular target marked on the ice. Each team has eight stones. The purpose is to accumulate the highest score for a game, points being scored for the stones resting closest to the centre of the house at the conclusion of each end, which is completed when both teams have thrown all of their stones. A game may consist of ten or eight ends.

The curler can induce a curved path by causing the stone to slowly turn as it slides, and the path of the rock may be further influenced by two sweepers with brooms who accompany it as it slides down the sheet, using the brooms to alter the state of the ice in front of the stone. A great deal of strategy and teamwork goes into choosing the ideal path and placement for each situation, and the skills of the curlers determine how close to the desired result the stone will achieve. This gives the game its nickname of "Chess On Ice".

en.wikipedia.org/wiki/Curling