 Complete the following phrase:  In order to test the arenas built for the Olympics, the Bolshoy Ice Dome served as one of the venues for the 2013 IIHF World U18 Championships. It subsequently held the Channel One Cup from 1922 December 2013 in final preparation before the start of the Games. As the main venue for the 2014 Olympic ice hockey competition, the Ice Dome hosted most of the preliminary round games and almost all the playoff round matches for the mens tournament, while hosting solely the medal matches of the womens tournament. On February 20, it held the gold medal match for the 