What ratings are used? Online Bughouse ratings or rapid ratings?
2023 Chess.com Bughouse World Championship

2023 Chess.com Bughouse World Championship
This year’s tournament will consist of Arena Qualifiers, followed by a Group Stage, ending with a Single Elimination Bracket to determine the world champions.
The event runs from November 28 2023 through February 2024 and will have a $5,000 prize fund sponsored by Chess.com.
Previous World Champions
2020: 12teen + ChickenCrossroad
2021: Catask + JefferyX
2022: Catask + JefferyX
Full details:
https://docs.google.com/document/d/1lxmO4WU46UQTFUn8tpoWRKuiOwaYN2QbTii4yThZyB0/edit?usp=sharing
Qualifying Arenas will be played November 28-December 6.
Broadcast
Matches of the 2023 Bughouse World Championship will be broadcast on Chuck Moulton's Twitch channel https://www.twitch.tv/chuckmoulton
Stay up to date on the tournament by joining the official Bughouse World Championship Club and Discord.
https://discord.gg/CN4SnAtE4
Open Section
To join the open section you must join the Bughouse World Championship Open 2023 club on chess.com and play the qualifier arena tournaments that the club organize https://www.chess.com/club/bughouse-world-championship-open-2023To join the club your rating must be over 2000, if not you should join the challengers instead.
Challengers Section (Under 2000)
To join the open section you must join the Bughouse World Championship Challengers 2023 club on chess.com and play the qualifier arena tournaments that the club organize https://www.chess.com/club/bughouse-world-championship-challengers-2023To join the club your rating must be under 2000.
There is no need to preregister this year. You join the club and play the qualification arenas.
If you qualify by getting top 4 in an arena you will be added to the official bracket.
Join the Chess.com Bughouse World Championship Club https://www.chess.com/club/bughouse-world-championship

is the section decided by the average rating of the 2 players or do both players have to be above/under 2000 for their respective section
Both players have to be under 2000 to play Challengers
Both players have to be over 2000 to play Open
When you apply for the club I check that your rating is correct befoer I accept you to the club
2023 Chess.com Bughouse World Championship
This year’s tournament will consist of Arena Qualifiers, followed by a Group Stage, ending with a Single Elimination Bracket to determine the world champions.
The event runs from November 28 2023 through February 2024 and will have a $5,000 prize fund sponsored by Chess.com.
Previous World Champions
2020: 12teen + ChickenCrossroad
2021: Catask + JefferyX
2022: Catask + JefferyX
Full details:
https://docs.google.com/document/d/1lxmO4WU46UQTFUn8tpoWRKuiOwaYN2QbTii4yThZyB0/edit?usp=sharing
Qualifying Arenas will be played November 28-December 6.
Broadcast
Matches of the 2023 Bughouse World Championship will be broadcast on Chuck Moulton's Twitch channel https://www.twitch.tv/chuckmoulton
Stay up to date on the tournament by joining the official Bughouse World Championship Club and Discord.
https://discord.gg/CN4SnAtE4
Open Section
To join the open section you must join the Bughouse World Championship Open 2023 club on chess.com and play the qualifier arena tournaments that the club organize https://www.chess.com/club/bughouse-world-championship-open-2023
To join the club your rating must be over 2000, if not you should join the challengers instead.
Challengers Section (Under 2000)
To join the open section you must join the Bughouse World Championship Challengers 2023 club on chess.com and play the qualifier arena tournaments that the club organize https://www.chess.com/club/bughouse-world-championship-challengers-2023
To join the club your rating must be under 2000.
There is no need to preregister this year. You join the club and play the qualification arenas.
If you qualify by getting top 4 in an arena you will be added to the official bracket.
Join the Chess.com Bughouse World Championship Club https://www.chess.com/club/bughouse-world-championship