<|im_start|>user
How often is The Australian Chess Championship held?

Context:
The Australian Chess Championship is a tournament organised by the Australian Chess Federation and held every two years. The tournament is largely restricted to Australian chess players, although it is common to allow a small number of strong overseas players to compete. The highest-scoring eligible player (frequently the tournament winner) holds the title of Australian Chess Champion until the next tournament is held. The tournament format is normally a restricted Swiss system, and in case of a tie for first place, a playoff match or tournament is conducted.<|im_end|>
<|im_start|>assistant
Every two years<|im_end|>
