Peterborough Milton and Kettering remain the teams to beat in Handicap League Group B after bagging home victories against Priors Hall and Northants County respectively.
Leaders Milton were involved a tight contest with Priors before a five-hole success from Derek Mankelow and Trevor Henderson in the penultimate tie helped secure a 9-0 victory.
Kettering are still two points behind in second place as they defeated County 14-4, mainly thanks to a couple of convincing late wins from Kim Davis and Robert Henbury (five holes) and Jack Murray and Mark Brown (seven holes).
Kingsthorpe maintained their perfect winning record in Group C as they completed an excellent 13-0 away success at Brampton Heath.
With three victories from their three previous outings, Kingsthorpe wasted little time in establishing a big lead as Steve Jackson and Dale Betts (five holes) and Kev Purkis and Ian Townsend (four holes) won the opening two games.
Although the hosts managed to halve a couple of ties, they were powerless to stop Kingsthorpe extending their advantage as the team climbed two points clear of Farthingstone, having played one less match.
Overstone Park moved a step closer to topping Group D as they recorded their fifth victory on the bounce, and sixth all season, with a 15-7 home success against Collingtree Park.
Phil Gardner and Dale Burton (five holes) got the team going in the opening tie, while Luke Tibble and Jon Ball settled any Overstone nerves with a six-hole success in the final game.
Second-placed Rushden kept alive their hopes of qualification for the semi-finals as they fought back from an early deficit to beat Cold Ashby 10-5 at home.
Although the visitors opened up a five-hole lead after two games, Rushden took control thanks to wins from Kane Attley and Stuart Emms (five holes) and Ian Blakeley and Martin Pickering (three holes), before edging both the last two ties.