Glicko is a more complex system than Elo, in that it has 2 numbers per rating. That’s not to say it’s necessarily better, or more accurate – just different. Glicko is an alternative rating system to Elo, which is what the NAF has been using since Griff was in short trousers. You can find the current rankings on the Members Area, and analysis of the games and tournament information on the Tableau page. The Majors have a MAX of 60 coaches, and are treated as always having 60 coaches, even if there are fewer, while non-majors have a MAX of 32. The MAX value is the maximum number of coaches that can contribute to the K-value. K-Value = (Square Root (Min(Number of NAF coaches,MAX)) ) * 2 The number of NAF coaches in the tournament determines K-Value in this equation. Player’s New Rating = Player’s Old Rating + (K-Value * (Scoring Points – Player’s Win Probability)). Players’ new ratings are determined as follows In the equation below, players receive 1 point if they win the match, 0 if they lose, and 0.5 for a draw. This probability is then used to recalculate each player’s rating after the match. Win Probability = 1/(10^((Opponent’s Rating-Your Rating)/150) + 1) If you play at NAF sanctioned tournaments, then the larger the tournament, the larger the potential change in your CR.Ĭoach rating is calculated by a complex formula and isn’t for the faint of heart. For example, if you lost to a very good coach then you lose less Coach Rating than if you lost to a worse coach. The neat part is that your Coach Rating is adjusted based on how tough the opponent was. ![]() When you lose a game your Coach Rating is reduced. When you win a game, you gain Coach Rating. If you attend a NAF sanctioned event using a particular race, your NAF ranking for that race is then activated. ![]() Each coach starts with a Coach Rating (CR) of 150 for every official Blood Bowl roster.
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