Nathan Large scored the all-important 17th minute goal for Sychdyn that condemned leaders Penyffordd to their first league defeat of the season.
Second-place Sychdyn closed the gap on the Lions to three points, although they have played two games more.
Prior to Saturday, Penyffordd had gone 13 league matches without a loss since the start of the campaign.
Skipper Large gave the home side that early boost and then it was a real battle for the remainder of the game.
Lions pushed hard for the equaliser, but Sychdyn held on. Nathan Bowker was their man of the match.
FCUW looked on course for a second league win of the season when they led 3-1 at half time, but the Steelmen battled back to claim a thrilling victory after the break.
Ethan Snell struck first for Lodge, but Jordan Howell, Daniel Roberts and Callum Parry replied to give the visitors a two-goal advantage at the turnaround.
Brymbo upped their game after the restart, Levi Andrews making it 3-2 before a Snell double completed his hat-trick to seal a famous triumph.
Lee Reynolds’ third-minute goal was enough to deliver Town a ninth victory in 11 league outings.
A good result for Caerwys and their new manager Daniel Sands at third-place Ruabon.
The visitors led twice through Toby Hughes and Lewis Harrison (pen), but Rovers replied on each occasion via Chris Bennion and Owen Bather.
A comfortable win for Greenfield took them to within a point of table-toppers Chirk Town but having played a game more.
Ryan Jones (2), Benjamin Sim and Dylan Roberts split the haul for the home side, who bagged two in each half.
Thomas Bridges secured three points for Hawarden with a second-half double after Ryan Tierney had handed the hosts a 35th minute lead.
Scott Davies plundered a hat-trick to guide Villa to victory, finding the net on 42, 53 and 79 minutes.
Adrian Davies, Ross Walker and a Harry Killick own goal ensured Spartans edged the honours over a Rangers side under new management.
The away side hit back through Callum Dutton and Matthew Jones.
Joshua Edwards pocketed a hat-trick for a Hawarden side which enjoys a nine-point lead at the table summit.
Second-place Spartans held on to that position thanks to a 46th minute Jay Wiles decider at Lon-yr-Ysgol.
Liam Lawrence’s second-half pair made sure the Park bounced back from two-down at half time to claim all three points.
Goals from Robert Jones and Iwan Davies had Ruthin in command at the interval, but Matthew Bithell halved the deficit before Lawrence took over.
Sam Moore and Nicholas Harron put Alun two goals ahead early in the second half, but this sparked a major Coedpoeth recovery as Sean Phelan, Jacob Williams and Andrew Griffiths all netted in the last 18 minutes to turn the tables and deliver a home win.
Jack Goulbourn, a Reece Jones own goal, Daniel Bevan and Jake Hayward all combined to bring about Llangollen’s triumph at Lex.
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