Player Ratings Explained for Organisers
What a rating is, why you can lose a match and still gain, and how to use it.
What a rating actually is
A rating is a single number estimating how well someone plays. In RallyIQ it runs from 2.0 to 8.0, and a player with no history starts at 4.0.
It is not a ranking. A ranking is a position in a queue - being 4th tells you nothing about the gap to 3rd. A rating is a measurement, so the distance between two numbers is meaningful, which is what makes it useful for building fair groups.
Why it beats old skill bands
Most clubs have historically sorted people into "beginner", "intermediate" and "advanced". Two problems: the bands are enormous, and nobody agrees where the edges are. Two players both called "intermediate" can be wildly mismatched.
A rating is continuous. It can say one player is 4.2 and another 4.6, and that difference is real and usable.
How the number moves
This is the part worth understanding properly, because it is the part players ask about.
Your rating does not move on whether you won. It moves on how you did compared to what was expected of you.
Before a match, RallyIQ averages each team's ratings and turns the gap into a predicted scoreline. Afterwards it compares what happened to that prediction.
- Lose but keep it close against a stronger pair, and your rating rises. You did better than predicted.
- Win narrowly when you were heavily favoured, and your rating falls. You did worse than predicted.
Players find this deeply counter-intuitive for about a week, and then prefer it, because it rewards playing well rather than playing weak opponents.
Partners do not always move together
In doubles, most systems move both partners identically. RallyIQ adjusts each one by how far their own rating sits from the team average.
So a strong player carried by a weaker partner gains less from a win and is marked down harder for a loss. The weaker partner gains more and is punished less. Credit follows what each player was expected to contribute, which is the fair reading of a mixed pairing.
The guard rails
Four rules stop a rating being wrecked by one strange evening:
- Severe mismatches are ignored entirely. If the two teams' average ratings differ by more than 1.5, the match does not count towards ratings. A hopeless mismatch says nothing about anyone's standard and would unfairly punish the weaker pair.
- No single game dominates. One match can move a rating by at most +0.40 or -0.25. The upward limit is deliberately bigger, so one bad night costs less than one good night earns.
- New players settle fast, established ones stay steady. Ratings move quickest when the system knows least about you, then smoothly slow. Players with few matches are flagged provisional so a volatile early number does not distort later draws.
- Corrections are clean. Fix a wrong score from round one and the whole event is recalculated from the starting ratings, rather than patched. The history becomes exactly what it would have been had the score been right first time.
How to use ratings as an organiser
Three jobs, in order of value:
- Build pools. Rank the field and cut at the biggest gaps in standard, so every match is close. This is the single biggest lever on whether people enjoy an evening.
- Seed a bracket. If you run a knockout stage elsewhere, ratings are the most defensible seeding source you can have. See how to seed a bracket.
- Balance teams. For a social mixer, pair a high rating with a low one and the teams come out even.
Common questions
A player says their rating is wrong. What do I tell them?
Usually they are comparing it to their win count. Ask who they beat. Three wins over much weaker players moves a rating very little, and that is correct behaviour rather than a fault.
How many matches before a rating is trustworthy?
Expect a genuinely volatile first few. RallyIQ flags players as provisional below five matches, and the number settles noticeably from there.
Can a rating go down even if someone is improving?
Yes, temporarily, if they have been playing opponents who flatter them and then meet a proper test. Over a full event the number tracks real standard closely.
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