DCI (Wizards of The Coast) - Magic: The Gathering

Magic: The Gathering

The DCI maintains rules and assigns players ratings for three basic categories in Magic: Constructed, Eternal, and Limited. A fourth rating category, Composite, is the average of a player's Constructed and Limited ratings. Each category supports a number of related tournament formats. A player's tournament performance in one of the categories does not affect their rating or ranking in the others, except Composite. The DCI has recently introduced a new rating category, called Total rating. This rating will replace most of the existing individual ratings at the beginning of 2010. Although no rating category will cease to exist, Total will replace the other categories for rating-based invitations and byes.

Separate groups of rankings are maintained for team and multiplayer variants. Sanctioned team and multiplayer uses teams composed of two or three players. There are several team and multiplayer variants, each given its own ratings category. Rules are also provided for other multiplayer variants, but only the formats mentioned above are ranked.