Q: What is DCI?
	A: DCI stands for Duelists Convocation International.  It is an organization of Magic players.  DCI releases tournament rules and rankings of its members.  ManaLink™ uses the DCI tournament rules and the DCI ranking system in an unofficial manner to better regulate the ways in which games of Magic are played.
Q: How about this weird ranking system?
	A: There are two ways to answer this question, the easy way and the complicated way: easy: 1600 is the average ranking.  If you play an opponent with a higher ranking than you, you will either lose a few points (if you lose the game) or you will gain a lot of points (if you win).  If you play an opponent with a lower ranking than you, you will either lose a lot of points (if you lose the game) or you will gain a few points (if you win). complex: For the following calculations: W: probability of Winning YR: Your current Ranking OR: Opponent's current Ranking NR: New Ranking PR: Previous Ranking S: Score for the match (1 for a win, 0 for a loss, 0.5 for a tie) DM: Difficulty Multiplier (32 if PR < 1100, 16 if PR > 1099 and PR < 2100, 24 if PR > 2099) chance of winning formula: 1 ----------- W = OR - YR ------- + 1 40 After the match, the new ranking formula is used for each player: NR = PR + (DM * (S - W)) Oh, and please remember that this ranking is unofficial.