This command toggles your bell variable, but you may as well
use the "set" command instead.
The bell is sent at the following times unless turned off:
- When you are challenged to a match.
- When you receive an update on a game which you're observing.
- When you receive an update on the game which you're playing.
You can also set your "bell" variable to 0, 1, or 2, using
the "set" command.
0: You will hear no bells.
1: You will hear bells in the cases listed above.
2: You will hear a bell ONLY when your opponent makes a move.