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
Glossary of curling to 10 the rings behind the tee line. Sometimes, 11 is used to indicate a stone thrown so that it passes through the house and out of play. With this system, the sweepers can communicate more effectively where they think the stone will end up or the skip can better tell the deliverer how hard to throw it. Glossary of curling This is a glossary of terms in curling. During a game, sweepers might call out numbers. These numbers indicate how far the sweepers think the rock in play will travel. This system is relatively new to the game and