Defending champion St Clair will have to beat both Balmacewen teams if it is to qualify for the provincial senior pennant final this year.
Otago Blue has been dominant this year with a maximum of 24 points and has lost only 6.5 out of 48 games during the 10-round series.
This means Otago Blue will host the final, while second-placed St Clair will host a single home semifinal with Otago Gold as its opponent next Saturday.
Going into the catch-up games yesterday, only Chisholm Park could depose Otago Gold for third but the Park team had a tall ask meeting St Clair on the hilltop Corstorphine course.
The team's quest was not helped when No5 Antony McCullough gifted Ryan Bellamy a 10 and 8 win after failing to turn up.
St Clair beat the Park quintet by a 5 to 1 margin while Taieri posted its second win of the series yesterday, beating Otago Gold with four wins and a half.
On Saturday St Clair beat Taieri playing at home with four wins and a half, with Brent McEwan, Michael Ormandy and Greg Johnson winning by convincing margins.
McEwan went under par, while Ormandy hit the pin on the par-3 seventh Porridge Pot hole, missing a hole in one by centimetres.
At No2, Stephen Hitchcox birdied the last hole to clinch a narrow win over Roy McLean.
Otago Blue showed the wealth of talent in the club, posting a 5 to 1 win over Chisholm Park despite having five front-line golfers absent for the encounter.
Ring-ins Paul Hubbard, Tony Ruddenklau and Aaron Charteris all had one-up wins over their opponents, while regulars Brandon Hodgson and Daniel Elder won by impressive margins.
