Auckland were the final team to confirm their semifinal place, joining Canterbury, Bay of Plenty and Southland, when they overcame defending champions Wellington on a dramatic day at the Poverty Bay Golf Club in Gisborne.
Division one was dubbed the pool of death and so it proved as the two most successful teams in the history of the Toro Men's Interprovincial, Wellington (13 wins) and Auckland (12), fought it out with a place in the final at stake.
Auckland No 1 Ryan Fox, who is trying to win his first interprovincial title before he turns professional, won the feature match of the day 1up against his good mate and Wellington rival Ben Campbell.
But the team contest was already won by that stage when Auckland No2 Fraser Wilkin defeated Thomas Spearman Burn 1up to put the point beyond reach. Auckland won in the end by 4-1.
Wilkin made a crucial birdie on the 17th that was the deciding moment of the match.