Matchmaking rules

Ranked

The matchmaking system for ranked games in career works like this:

1. Determine the eligible map pool:
   • Take the player's league map pool
   • Compute X as the half of the map pool size
   • Get the X last played maps
   • Remove those maps from the map pool
2. Get the 100 oldest available ranked matches matching these conditions:
   • Map is in the eligible map pool
   • Opponent's league has to be between your league - 1 and your league + 1
   • If opponent's league is different than yours: league score delta has to be lower than 100 points
3. Remove matches matching these conditions:
   • Opponent has already been played in the last 5 minutes
4. At this point, there are 2 possible cases:
   • There are some matches remaining:
     • Sort the remaining matches using these comparison rules:
       1. Opponent with the closest league first
       2. In case of equality: opponent using a different IP first
       3. In case of equality: opponent never met or met the furthest in the past first (considered equal under a 10 minutes delta)
       4. In case of equality: opponent with the closest league score first (considered equal under a 10 points delta)
       5. In case of equality: oldest match first
     • Take the first match of the sorted list and join it
   • There's no match remaining:
     1. Pick a random map from the eligible map pool
     2. Pick a random left/right side
     3. Create a new match using these parameters

Unranked

The matchmaking system for unranked games in career works like this:

1. Determine the eligible map pool:
   • Take the unranked map pool
   • Compute X as the half of the map pool size
   • Get the X last played maps
   • Remove those maps from the eligible map pool
2. Get the 100 oldest available unranked matches matching these conditions:
   • Map is in the eligible map pool
3. Remove matches matching these conditions:
   • Opponent has already been played in the last 60 seconds
4. At this point, there are 2 possible cases:
   • There are some matches remaining:
     • Sort the remaining matches using these comparison rules:
       1. Opponent with the closest XP level first
       2. In case of equality: opponent using a different IP first
       3. In case of equality: opponent never met or met the furthest in the past first (considered equal under a 10 minutes delta)
       4. In case of equality: oldest match first
     • Take the first match of the sorted list and join it
   • There's no match remaining:
     1. Pick a random map from the eligible map pool
     2. Pick a random left/right side
     3. Create a new match using these parameters