What information is included in a player’s DCI number?

A player’s DCI number serves as a unique identifier that is essential for tournament participation and rankings within the DCI (District Championship Inc.) system. This number allows players to be easily recognized in official records, track their participation in events, and maintain an accurate ranking based on their performance in various tournaments.

The DCI number does not function as a personal security code, nor does it provide a comprehensive list of a player’s achievements or a detailed historical win-loss record. Instead, it is specifically designed to manage player identity and facilitate the fair organization and tracking of competitive play in Magic: The Gathering. Thus, it is the correct choice because it encapsulates the primary purpose of the DCI system in managing player identities within the competitive environment.