Eleven teams from seven schools attended, including three from outside Dunedin.
The OBHS A team successfully defended its title, but was under severe pressure from the John McGlashan A team, until it pulled away in the final two rounds to win.
The contest for third was very close, and was claimed by James Hargest College on 18 points after a final-round 4-0 sweep of fellow Invercargill team Southland Boys' High School.
The three top teams qualify for the South Island finals in Ashburton, while OBHS A and James Hargest will also play for their provinces at the national finals in Christchurch.
John McGlashan's Martin Brook made a clean sweep winning his seven games.
-By Quentin Johnson