FAQ

Where do match results come from?

Match results are collected from rankedin.com and tournament.tools. Ratings are updated after each event.

How does rating change after matches?

Your rating can go up or down after each recorded match.

• If you beat a higher rated player, your rating usually goes up more.
• If you lose to a lower rated player, your rating usually goes down more.
• If the result is expected, your rating usually changes only a little.

I won most of my matches but my rating dropped?

Rating changes depend on who you played, not just how many matches you won. Beating much lower-rated players gains very little, while a single loss to a much lower-rated opponent can cost a lot. So winning 5 out of 6 matches can still result in a net rating drop if the one loss was against a weaker player.

What is "confidence"?

Confidence is how sure the system is about a player's rating. On this site it is shown as High, Medium, or Low.

• Low: not much information yet (for example, few matches). Ratings can move faster.
• High: lots of information. Ratings usually move more slowly.

What does "unranked" mean?

Players with fewer than 10 completed matches are shown as Unranked. They still have a rating, but they do not receive a rank yet. After 10 matches, you move into the ranking and receive a rank number.

Technical Details (Glicko-2)

Extra details (not needed for normal use):

• The system is based on the Glicko-2 rating system. Wikipedia: Glicko rating system
• Under the hood each player has three main values: rating, RD (rating deviation), and volatility. RD is uncertainty (higher means "less sure").
• The number shown on the website is the plain rating: round(rating).
• The confidence label is derived from RD: High if RD <= 80, Medium if RD <= 150, otherwise Low.
• New players start at rating 1500, RD 350, and volatility 0.06.
• Match results are converted into a single outcome per match: win = 1.0, draw = 0.5, loss = 0.0.
• If a player does not play for a while, RD tends to go up, which lowers the conservative confidence label until more matches are played.