4PC on Chess.com uses the Glicko2 rating system, the same as regular chess. However, the **rating changes are calculated a bit differently**, since you have 3 (or 2) opponents instead of 1!

## Free For All

In Free For All mode, **each player has their rating adjusted based on the average rating of their 3 opponents. **

For example, if there is a 1500, 1600, 1700 and 1800 playing a game, then for the 1500, their rating change would be calculated as if they were playing against a 1700 (the average of 1600, 1700 and 1800).

But for the 1800, the rating change would be calculated as if they were playing against a 1600 (the average of 1500, 1600 and 1700).

**The rating adjustment also varies based on what place you take.**

1st place gets their rating adjusted as if they won 3 times against the calculated rating.

2nd place gets their rating adjusted as if they won 2 games, and lost one game against the calculated rating.

3rd place gets their rating adjusted as if they won 1 game, and lost 2 games against the calculated rating.

And 4th place gets their rating adjusted as if they lost 3 games.

## Teams

Teams **rating adjustment is done just like a 1v1 game**, except the rating of the teams is calculated slightly differently.

For the team rating, **it is not an average of the two team members' ratings, but is instead weighted toward the higher rated player**. The calculation is done like this, with the higher rating being H and the lower rating being L:

(2H+1L)/3

so if team A, an 1800 and a 1300 were playing versus team B, a 1500 and a 1600 then the rating adjustment would be calculated as if a game between a 1633 player (Team A) and a 1566 player (Team B)