Casey Gregg grabbed the goal that mattered on 83 minutes to ensure table-toppers Trearddur stretched their 100 percent record to four straight wins.
A first win of phase two for Pwllheli, goals provided by Rhys Williams and Cai Tate – one in each half.
Captain Damien Smith and Gwion Rowlands both scored twice as Bontnewydd claimed their first Championship win.
Oliver Bearman, Elis Williams and Cian Dafydd responded for Nantlle.
Ioan Summers of Bont was dismissed for a second yellow card on 76 minutes.
Owen Sidney’s goal handed Henllan a half-time lead, but Daniel Russell secured a point for unbeaten leaders Mochdre with a 63rd minute equaliser.
It was the first point of phase two for Henllan.
Three wins out of three for second-place Llanberis, Caio Jones (2, 1 pen) and Daniel Parkinson providing the away goals.
Dylan Jones and Cian Taylor responded for Pentraeth.
The Darans led 2-0, Pen fought back to two-apiece, but Jones sealed it with an 84th minute penalty.
Ashley Garratt, Daniel Martin and Harrison Nickson were on target for Sports in this victory over their Anglesey visitors.
It was Sports’ first game of the Championship phase. Dan Barton was the Gaerwen netman.
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