Coleraine ran out convincing 125-run winners against Newbuildings at Sandel Lodge.
Amy Caufield hit 14 boundaries in an unbeaten 86, sharing an opening stand of 130 with Amelia Guy who made 37.
There were runs too for Eva Gaston (18*) as the Bannsiders posted an imposing 165 for 1.
The visitors were bundled out for 40 in the reply with Kenya McCartney taking 3 for 8, while Caufield completed a fine all-round display to claim 2 for 3.
Fox Lodge travelled to Eglinton and emerged comfortable 9-wicket winners.
The hosts were soon in deep trouble as four wickets for Mollie Devine and three for Lucy Blair saw them reeling at 36 for 7, before skipper Megan McClintock made 20 to get them to 70 for 8.
The Ballymagorry side romped to the win inside 10 overs with Sarah Black hitting 5 fours in her 28, while Devine made a run-a-ball 17 not out and Lucy Neely an unbeaten 13.
Defending champions Bready eased to an 8 wicket win at home to Bonds Glen. Lucy Thompson hit five boundaries in a top score of 41 as the Bee Gees made 106 for 6 - two wickets for Tiara Mitchell, and one apiece for Sophie Hamilton, Kaylee Barnard, Millie and Jodie Spence.
The result was never in doubt after an opening stand of 71 in 9 overs between Millie Spence (32) and Lucy McGranaghan (24). Irish international Alana Dalzell's 18 not out confirming the win with 5 overs left.