The Genève-Servette HC competes in a league know by what name prior to the 2017-2018 season?
National League (ice hockey) The National League (NL) is a professional ice hockey league in Switzerland. It is the top tier of the Swiss hockey league system and of the two-tier National League. Prior to the 2017–18 season, the league was officially called National League A.
2017–18 Champions Hockey League The 2017–18 Champions Hockey League is the fourth season of the Champions Hockey League, a European ice hockey tournament. The tournament was reduced to 32 teams, and qualification was on sporting merits only. The six founding leagues are represented by between three and five teams (based on a three-year league ranking), while seven "challenge leagues" are represented by one team each. One place was reserved for the Continental Cup champion. Unlike in the three previous editions, founding teams didn't automatically qualify.