Unlisted: The game won't be shown in "Open games", only players with the direct URL will be able to join it
Karma restriction: Player lose karma when they're dropped out of games. Enable this to prevent players that drop out too often from joining your game.
Seed: A game with the same seed will always produce the same configuration.
Timer options
Time per game: total time each players starts with. Time decreases when it's the player's turn. When it runs out, other players can drop out the player whose time has run out
Time per move: When a player finishes their moves, this is added to their total time. Their total time can never exceed "Time per game"
Scheduled start: The game will start at the given date / time. If not enough players have joined at the specified time, the game will instead be cancelled
Timer begins at / Timer stops at: The timer runs part of the day, and is paused the rest of the time. This is useful when players are in the same timezone, no one is going to play at 3 am. To keep the timer always running, clear both fields.