The Arthur Koelle Tournament usually starts at the beginning of October, and runs for 7 weeks. It is the final major tournament for the year.

Format: If there are 24 or more players this event will be conducted as 2 separate Swiss tournaments over 7 weeks. If there are greater than 8 but less than 24 players in total, then the tournament will be conducted as a single Swiss tournament over 7 weeks. If there are 8 or fewer players in total, then a single tournament will be played in a round robin format. In a combined event the B grade winner will be the highest scoring player in the lower half of the field.
Eligibility: This will be determined based on latest ACF rating or seeding by the Tournament Director. No player with a rating less than 1000 will be required to play in a separate A division which could lead to more than half the players competing in the B division.