The system, located at http://forums.ozmium.com.au/showthread.php?t=1353, was created by enjay on 9/8/2002.

Rule 1: Consider only the top jockey on premiership table in each state.
Rule 2: Of the rides, consider only those whose last start was within 28 days.
Rule 3: The single bet is the ride with highest win percentage for that meeting.