Melville United stayed comfortably in third spot after their scheduled opponents, Tauranga City United, failed to front, leaving the Hamiltonians with a 3-0 victory and a five point gap back to Old Blues in fourth.
Old Blues scored the only goal of the game at Waikato University to beat Unicol 1-0 and move onto 31 points.
In the Premiership's other games, Otumoetai's Isaac Bright, Daniel Miller and Matt Collins scored goals in a 3-0 win at Rotorua United while a first half penalty gave Tauranga Boys College a 1-0 win over Waikato Stud Matamata Swifts.
Claudelands Rovers stayed in third, two points off the promotion pace, with a 6-5 win over Te Puke at Galloway Park. Joel Roil and Waikato Ball each grabbed doubles and were joined on the score sheet by Cam Olsen and Ewan Oliver. Te Puke, who led 3-2 at the break, replied with strikes from Amrit Singh, Nick Johnson twice and Charlie McIllwaine, who also scored twice.
Te Awamutu had their best day of the season after scoring a 7-0 win at Ngongotaha reserves.
Whakatane Town beat Old Blues reserves 2-0 in the final game in the Championship. They scored a goal in each half, through Ricky Owen and Jordan Whittaker.