At Mackey Park, Tempe and also at Royal Sydney Golf Club. Probably 4 qualifying blocks followed by a best-of-3 knockout, plus consolation events.
https://portal.revolutionise.com.au/cnsw/events/319519

NSW GC Open Singles Championship

Red block

Wins Losses Net
Hoops
#
Kevin McGlynn (Canberra) 6 1 +15 1
Peter Sinclair (Marrickville) 4 3 +2 =2
Ted Woodley (Chatswood) 4 3 +14 =2
Michael Chang (Mosman) 4 3 +3 =2
Werner Borkhardt (Byron Bay) 3 4 -3 =5
Richard Christian (Royal Sydney Golf Club) 3 4 -9 =5
Andrew Bissex (Forster) 2 5 -6 =7
Ann Clifton (Queanbeyan) 2 5 -16 =7

Ranked by the share of matches won. A tournament's own regulations may place its players otherwise.

There is no known tie break method.