UML entity-relationship diagram for a competitive gaming platform with user authentication, match scoring, and ELO rating tracking. The schema connects users to sessions and matches, with class-based tournament organization and player-specific ELO histories managed by configurable algorithm parameters. This architecture demonstrates best practices for multi-user gaming systems: role-based access (users, players, admin_users), match validation workflows, and historical rating audits. Fork and customize this diagram on Diagrams.so to adapt it for your tournament management, esports platform, or skill-based matchmaking system. The separation of users, players, and admin_users tables enables flexible permission models and audit trails critical for competitive integrity.