The Chess Community, because their members do organize tournaments. Then you have to register your Hive and lichess name in the comments of the tournament round announcing post, so you could have your Hive rewards for the participation. The tournaments can be found here:Welcome to Hive, @mrsarri. You should also be a member of
Sunday:
https://hive.blog/hive-157286/@chessbrotherspro/initiative-checkmate-boredom-on-hive