University-Grange beat Kaikorai by 62 runs on Saturday to win the declaration competition and stay in the hunt for the Bing Harris trophy.
With just three rounds of twenty/20 left in the summer, three senior teams remain in contention for the overall senior title.
Green Island leads with 70 points from Albion (69) and Grange (67).
In other declaration games, Taieri finished a disappointing season with a good win over North East Valley.
Green Island scored an impressive 314 for seven to dispatch Carisbrook-Dunedin by 93 runs, and Albion beat expansion club Pelichet Bay by 54 runs.
•Taieri 220/9 beat North East Valley 154at Memorial Park
Taieri opener Hayden Anderson anchored his side's 66-run win over North East Valley with a fine innings of 83.
Baden Wilton was the only other scorer of note, whacking an undefeated 58 to help Taieri reach 220 for nine.
Left-arm wrist spinner Simon Murley cleaned up the tail and captured the key wicket of Anderson.
He was rewarded for some beautiful bowling with five for 67 from 26 overs, and Gary Paine took three for 31 from 10 overs.
In reply, Valley lost three quick wickets, but Nick Fitzgerald scored 59 to help give the innings substance.
Left-arm medium pacer Rueben Simpson was the pick of the Taieri bowlers with three for 31 from 12 overs.
•Green Island 314/7 beat Carisbrook-Dunedin 221 at Tonga Park
Green Island opener Jamie Munro joined the 99-club and left the crease cursing a rash shot.
But his superb knock off 103 balls helped Green Island amass 314 for seven and beat Carisbrook-Dunedin by 93 runs.
Munro hit a six to move to 99 but tried to repeat the dose and top-edged a catch to the keeper, Tony McEntyre.
Carisbrook's attack came in for some punishment, but Paul Hoffman more than held his own, picking up five for 74 from 21 overs.
Experienced seamer Dion Lobb snuffed out Carisbrook's reply with four for 64.
Tail-ender Dan Willemsen made a spirited effort to snatch victory from the jaws of defeat.
He smashed an unbeaten 63 from just 36 deliveries in an entertaining innings.
•Kaikorai 184 lost toUniversity-Grange 246 at Bishopscourt
You have to feel for Charlie Hendry.
The Kaikorai opener carried his bat with a wonderful innings of 108 but watched powerlessly as the rest of his team-mates capitulated.
Chasing University-Grange's total of 246, Hendry anchored the reply.
But the wickets kept tumbling at the other end, with Will Somerville and Jason Hynes picking up three apiece as Kaikorai was dismissed for 184.
Earlier, Michael Bracewell and Craig Smith set up the win with 65 and 61 respectively.
Ben McCormack added 44 to guide his side past 200.
Kaikorai's Craig Sneddon took a five-wicket bag and Adam Hubber and David Webb took two each.
•Albion 266/4 beat PelichetBay 212 at Logan Park
Nathan King finished the declaration competition on a high with a century to help Albion beat Pelichet Bay by 54 runs.
King blasted 10 fours and two sixes, and, with PJ Cairns, the pair added 123 for the third-wicket, guiding Albion to 266 for four when the declaration was made after 51 overs.
James Cleland took two for 46 and the Bay made a promising start to its chase, adding 50 before the first wicket fell.
James Fuller scored a half century batting at No 5 and there was some useful contributions from the tail.
But all-rounder Cairns completed a memorable day, picking up four for 51 from 11 overs to go with his innings of 79.
