OK, so for 1968, I have eliminated Cincinnati and Kitzbuhel. Dublin stays as it was an open event, despite not having a mix of competitors.
I see that WCT stayed a professional event in 1970. This move is gonna cause some major changes in the rankings I guess, but we have to stay true to the goal, which is an OPEN era rankings history.
I see that Cincinnati became open in 1969, along with Indianapolis. I see former amateur players in a prize money payout format. Can you confirm this?