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

Black block

Wins Losses Net
Hoops
#
Mark Scruton (Canberra) 4 2 +10 =1
Chris Williamson (Toronto) 4 2 +12 =1
Stephen Burns (Cooks River) 3 3 -4 =3
Simon Cook (Coutts Crossing) 3 3 +1 =3
Alexander Michalak (Newcastle National Park) 3 3 -1 =3
Georgina Carnegie (Royal Sydney Golf Club) 2 4 -11 =6
Rodney Peet (Maitland) 2 4 -7 =6
Aniko Osvald (Manly) withdrawn 0 0 0

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

There is no known tie break method.