Mixed curling the house. In the 2015-16 season, a new rule called "power play" was added, which each team can exercise in one end per game, only when they have the hammer. Instead of positioning the rock in the house on the center line, it is placed to a position straddling the edge of the eight-foot circle, with the back edge of the stone touching the tee line. The opponent's guard stone is placed in line with the stone in the house and the hack. The power play cannot be used in an extra end. Mixed curling Mixed curling, also known as
Mixed curling the Tim Hortons Brier are single-sex events or are divided into single-sex divisions. In mixed doubles curling, two players, one woman and one man, compose each team. The idea was developed by Curling Canada's Warren Hansen in 2001 to be one of four discipline variations for the introduction of the Continental Cup of Curling. The first World Mixed Doubles Championship took place in 2008. Since its inception, Switzerland has won six of the first ten titles. Russia and Hungary have won their first world curling titles in the mixed doubles championship, and New Zealand, France, Austria, and the Czech Republic