Tournaments happen in the tournament rooms. Click on a tournament room in the Room Window to enter a room. For most room you need rank knight.

 

Click the button Join Event below the player list:

 

 

The tournament director receives an automatic chat message that you would like to join. Also your status in the player list changes to Wants in. As soon as the tournament director accepts your application to join, your status changes to Registered.

 

If you have rank Bishop or better, you can organize tournaments.