First placed Orange City were bowled out for under 200 by ninth-placed Kinross, while CYMS and Centennials Bulls, who are both neck-and-neck in fourth and fifth, hang in the balance heading into the second week.

Kyle Aubin put a stop to CYMS' top three after a solid start from the green and golds, but the Gurney brothers ensured there was no chance of a rebound at Riawena Oval.

Centennial Bulls bounced back with the ball after a 50-run opening stand, as Aubin took 3-41, Ryan Gurney 4-24 and Joel Gurney 2-25.

Their work with the ball meant outside openers Matt Baker and Adam Smith, CYMS couldn't get partnerships going and no batter was able to make a score despite Smith (44), Baker (24), Anthony Spruce (37), Hugh Le Lievre (25) and Aquinder Dhillon (19) all making starts.

While CYMS had the dream start with the ball, dismissing Blake and Kyle Aubin for zero and three at the top of the order, but Joel Gurney (33) and Tyler Horton (58 not out) helped steer the side towards the box seat, with 53 runs needed and five wickets in hand.

Meanwhile, George Cumming stole the show for Kinross at the Country Club Oval with ball in hand, snaring six wickets to help bundle the Warriors out for 198 in 59 overs.

Cumming took 6-66 from his 21 overs, including the crucial wickets of Lachie Coyte (11), Shaun Grenfell (26), Blake Weymouth (41) and Ben Schofield (56) after the latter two put on 100 for the opening wicket.

Kinross coach Walter Prowse said it looked like it'd be a long day for the students until Cumming stepped up.

"I think we're very happy, it was a lot of work to pull it back to 198, in those conditions when we had the first two sessions without losing a wicket we thought we were in for a long day," he said.

Dismissing the Warriors for under 200 is a massive boost for the students, who are hunting their second win for the season, and a win over the ladder-leading Orange City would give finals a massive shake-up.

While Grenfell and Brad Johnson has the side 2-9 after dismissing Harry Kermode and Tim May for eight and a duck respectively, Will Luelf (21 from 50) and Alex Brien (5 from 47) dug in to see out the remaining overs of play.

Prowse said while it was exciting for his side to be in with a sniff, their work with the bat still needed a lot of work.

"Recent history would say Orange City shouldn't be too worried but if we decide to bat well we should get there," Prowse said.

"I think we have to be confident we can do it."

Prowse was happy to see "real disciplined batting" from Luelf and Brien, and the former would need to make runs if the students were any chance of chasing down Orange City.

"Definitely, he's going to be an integral part of the chase. If we lose him early I think we might struggle to get the runs."

However, he held the most praise for his side's work with ball in hand, saying Cumming had "bowled well" and deserved the six-wicket haul.

"He did have a lot of overs but did really well to help come back from that 100-run opening stand and just came into his own," he said.

"We've got a pretty good bowling attack and they often compete for wickets with each other.

"This pitch wasn't doing a lot for the pace bowlers so he got a bit more spinning. He had a bit of luck, the first catch on the boundary was an absolute speccy from Brad O'Brien, we really needed it."