Scarborough 3rds took over at the top of the division after a convincing victory over one of their potential rivals for promotion, Seamer 2nds.
Jake Finnigan hit a remarkable 108 and with Sam Hills, 47, and Khaled Ahmed, 43, took the Scarborough side to 252-6 at tea.
Seamer were then skittled for 51, Reece Milner claiming 3-8.
Former leaders Duncombe Park 2nds were similarly outplayed by in-form Scalby 2nds, who amassed 295-8.
Adrian Hollingsworth, 91, James Wainwright, 89, continuing from his double century last week, skipper Daniel Gregory, 40, and Joe Hills, 25, were too strong for the visitors’ bowling attack led by Sam Ford, 5-92.
After the break the Helmsley team were bowled out for 103, Chris Ford top scoring with 35 as Hollingsworth claimed 4-40 and Richard Hesp 3-2 from his three overs.
Simon Ridley, 32, and Rob Gretton, 78, put Ganton in a strong position at Cloughton 2nds, putting on 122 for their second wicket.
Atul Palakottil added 34 out of a final total of 231-7 from 42 overs. The home team wicket-keeper, 13-year-old Tom Owenson, deserved credit for a fine performance behind the stumps but the innings was marred when Robert Bradley, at the non-striker’s end was hit by a fierce drive which he failed to avoid.
Paul Goodenough claimed 4-58 for Cloughton before adding 30 on the resumption. but despite a 103 third- wicket partnership between Rob Barker, 85, and Steve Chambers, who remained unbeaten on 38, the home team were restricted to 187-3.
Wykeham 2nds’ chances of avoiding relegation were boosted by a 40-run victory over Staithes 2nds, a result that dents the newcomers’ chances of promotion at their first attempt.
Wykeham were bowled out in a match reduced to 37 overs for 118, Steve Clegg, 30, the highest run-scorer as Stuart Theaker claimed 5-52 and Lee Oliver 4-50.
Replying, John Palmer took a match-winning 6-27, the visitors being all back in the pavilion for 78.
Hospitals looked on track for an imposing total at Thornton Dale, Marcus Edwards smashing an unbeaten 145 from 112 balls but because of rain the match was reduced to 35 overs.
After the break the home team were on 11-0 when further rain rendered play impossible.