If the Include Tie Breaker box is selected, your game will include a Tie Breaker question. To select and unselect, simply click on the check box. When the box is empty, the option is not selected. When marked with an X, the option has been selected:
The default setting for Include Tie Breaker is 'checked', i.e., to include a Tie Breaker question in the game.
Note: The reason for playing a Tie Breaker question in a training setting is to offer the instructor a way to break a tie score after all the regular matches of a game have been completed. If all the regular matches in a game have been played, and one team has a higher score than the other team(s), then the Tie Breaker question is not played.