Talk:Clan Wars/@comment-25903872-20141221124444/@comment-25890821-20150128181335

Trophies are used to determine eligibility for clan war within your clan only. So if there's 22 players, then the top 20 by trophy count will participate in the war. This is determined the moment a leader clicks "Start clan war search".

Clan war matches always have the same number of eligible players. Your clan might have 22 players and the other clan might have 24, but you'll each only go to war with 20 players.

Clans are matched up for clan wars based on the sum of all upgrades of all of your bases. A clan with 20 max TH8 could be matched with a clan that has 20 premature (rushed) TH10. Basically all upgrades are added up to make an internal clan score (upgrading your spells or troops or walls or townhall or literally any building will increase your clan score); your clan is matched with another clan who has a similar clan score.