Game played on an ice rink by two teams of six players on skates.
The object is to drive a puck (a small, hard rubber disk) into the opponents' goal with a hockey stick, thus scoring one point. A game consists of three 20-minute periods. The first true ice-hockey game was played in 1875 between two student teams at Montreal's McGill University. The National Hockey League , consisting of U.S. and Canadian professional teams, was organized in 1917. Hockey was introduced at the Olympic Games in 1920. It is a very aggressive game, and the puck is often taken from a player by means of a hit to the body, called a check. Some contact, such as checking from behind and slashing with the stick, is illegal and draws a penalty. See also Stanley Cup .