what does a power play do in hockey
Power play (sporting term) In ice hockey, a team is said to be on a power play when at least one opposing player is serving a penalty, and the team has a numerical advantage on the ice (whenever both teams have the same number of players on the ice, there is no power play). Up to two players per side may serve in the penalty box, giving a team up to a possible 5-on-3 power play. If a goaltender commits a foul, another player who was on the ice at the time of the penalty serves.[1]
Ice hockey rink At each end of the ice, there is a goal consisting of a metal goal frame and cloth net in which each team must place the puck to earn points. According to NHL and IIHF rules, the entire puck must cross the entire goal line in order to be counted as a goal. Under NHL rules, the opening of the goal is 72 inches (180 cm) wide by 48 inches (120 cm) tall, and the footprint of the goal is 40 inches (110 cm) deep.