Competitor-Context Rating Model
Arena does not rate a player in general. It rates a pair of a defined competitor and a defined competitive context.
That distinction matters because a Dead by Daylight result is not automatically evidence about one universal skill. A result needs an owner and a scope before Arena can treat it as rating evidence.
Why Arena needs this model
Section titled “Why Arena needs this model”A match result says what happened, but it does not explain by itself what the result should count for.
In DBD, one match can join several competitive questions together. Killer and survivor roles are asymmetric. The declared killer changes the strategic problem for both sides. Survivor performance is strongly shaped by the group that played together. Format rules, map context, voice assumptions, and other conditions can also change what the result means.
If Arena attached every result to a broad player record, the rating could look more general than the evidence really supports. A strong Nurse record could stand in for general killer strength. A survivor group’s result could be mistaken for an individual survivor rating. Results from different match environments could be mixed as if they answered the same question.
Arena uses the competitor-context rating model to avoid that blur. Before a result can update a rating, Arena asks what performance the result represents and what competitive context that performance belongs to.
The basic idea
Section titled “The basic idea”Arena rating is attached to a rating target:
(competitor, match context) -> rating valueThe competitor answers: whose performance does this result represent?
The match context answers: under what competitive conditions was that performance produced?
A rating value is Arena’s accumulated estimate for one competitor under one defined match context. Change the competitor or change the context, and you are talking about a different rating record.
The point is not to create more rating numbers for their own sake. The point is to make each rating honest about what the accumulated evidence can actually support.
What counts as the competitor
Section titled “What counts as the competitor”The competitor is the player or group whose performance the played format is trying to measure.
This depends on the competitive question behind the format. Some formats ask an individual-player question, so the competitor is a player. Other formats ask a team-performance question, so the competitor is the team. Arena does not force every result into one universal owner such as “the account” or “the individual player.”
The detailed attribution rules are explained in Competitor-Unit Attribution.
What counts as the context
Section titled “What counts as the context”The context is the competitive scope that determines which results can accumulate together.
In Arena, that scope can include the format, side, declared killer context, and other conditions that change what the result is evidence of. It is called as rating dimensions: separate rating tracks for separate kinds of competitive evidence.
The detailed dimension model is explained in Context-Specific Rating Dimensions.
Examples of rating targets
Section titled “Examples of rating targets”The model is easiest to see through examples:
(killer player A, Standard 1v4 / Killer side / Nurse) -> rating(killer player A, Standard 1v4 / Killer side / Doctor) -> rating(survivor group B, Standard 1v4 / Survivor side / vs Nurse) -> rating(survivor group B, Standard 1v4 / Survivor side / vs Blight) -> ratingThese are separate rating targets because they make separate competitive claims. Some skills may transfer across them, but the rating claim itself remains scoped to the target.