Info & Tips

Real Arena games on EUW, read from Riot's API and refreshed every hour. Tier lists cover one patch at a time; the leaderboard covers every game we have.

• A new patch becomes the default once it has 5,000 matches.
• Teams with an AFK player are removed: their placement is a 2v3, not a performance.

A game has 6 teams, so the average player finishes 3.5, lands top 3 in 50% of games and wins 16.7%.

Avg Placement = sum of placements ÷ games
% Top 3       = top-3 finishes ÷ games
% Top 1       = wins ÷ games
Play rate     = games ÷ matches on the patch

Green and red are relative to the list you're looking at, not to a fixed scale.

1. Small samples are pulled toward the average. A pick with 3 games at 1.00 shouldn't beat one with 500 games at 2.80.

adjusted = (games × value + k × average)
           ÷ (games + k)
k        = the list's median games, min. 50

2. One score per row. Each part is scaled from 0 to 1 within the list.

score = 60% Avg Placement
      + 20% % Top 1 + 20% % Top 3
      + up to 0.2 for volume (log of games)

3. Tiers follow the gaps. Rows with near-identical scores stay together, then each group is placed by its distance to the list's average score (σ = standard deviation).

S  ≥ +0.84σ      A  ≥ +0.25σ
B  within ±0.25σ
C  ≥ −0.84σ      D  below

Team Comps get no volume bonus: common class trios are common by construction.

The columns show what happened. The tier corrects two biases, so an S-tier item can show a worse average than an A-tier one.

• Surviving. A 6th item only exists if the game lasted: players with 3 items average 3.90, players with 6 average 2.48. Prismatics are compared by how many the player holds.
• Who buys it. Late items are bought by stronger players, who place better whatever they buy.

tier value = item's result
           − result of players at the same
             purchase number and similar rank

On the Legendary list, Better early and Better late compare the same item bought early and bought late.

A champion appears only if its Avg Placement moved by more than chance explains. Most patches have zero to four.

shown if  |avg now − avg before| > 3 × SE
SE = 1.71 × √(1 ÷ games now
            + 1 ÷ games before)

• Combos: two items or augments taken by the same player in the same game. Needs 5 games.
• Team Comps: the three classes of a team (e.g. Tank + Mage + Marksman), counted on every team of every match. Needs 20 teams.
• Anvil Run: games finished with stat anvils only, no items bought.

Our own rating, not Riot's: Riot doesn't expose Arena MMR. It ranks you among the players we track.

• Everyone starts at 25. All six placements move it, not just the top half.
• A team's strength is the sum of its three players.
• Beating stronger teams is worth more. Winning with stronger teammates is worth less.
• The fewer games we have on you, the more each one moves you.

team strength = MMR₁ + MMR₂ + MMR₃
expected      = odds of that placement,
                given the 6 team strengths
MMR change    ∝ (result − expected)
                × your uncertainty

Teammates MMR and Opponents MMR are the average MMR of your 2 teammates and of the 15 other players, over all your tracked games.

A rank appears after 5 tracked games.

Challenger   top 10
Grandmaster  next 15
Master       top 1%
then, of everyone left:
Diamond 4% · Emerald 13% · Platinum 18%
Gold 24% · Silver 21% · Bronze 16%
Iron 3%