Sligo Rovers moved five points clear at the top of the Premier Division table, with a game in hand, as they beat Shelbourne 3-1 at Tolka Park.
Jason McGuinness gave Sligo the perfect start when he hedaed home a corner in only the second minutes.
Central defensive partner Gavin Peers doubled the lead on 16 minutes when punishing further poor defending by Shelbourne inside their own box.
Mark Quigley added Sligo's third goal from a 76th minute penalty before Paddy Kavanagh got Shels' consolation strike seven minutes from time.
Shamrock Rovers made it three wins from three over Drogheda United this with a 2-0 victory in the second-versus-third clash at Hunky Dorys Park. The win moves Stephen Kenny's side to within a point of Drogheda.
Ciaran Kilduff put Rovers in front on 16 minutes, rising superbly to head home a Gary McCabe corner.
Ronan Finn doubled Hoops' lead on 33 minutes with another trademark strike to the bottom corner of the net from distance.
The only sour note for Rovers was the dismissal of midfielder Chris Turner on the hour mark following an off the ball incident.
Three players were dismissed as St. Patrick's Athletic's title hopes were dealt a major blow as they lost 1-0 at home to Bray Wanderers in a tempestuous clash at Richmond Park.
Marty Waters got the only goal of the game on 87 minutes, cutting in from the left to rifle a shot to the net despite keeper Brendan Clarke getting a hand to the ball.
But the major talking points occurred earlier when Bray's veteran striker Jason Byrne was initially sent off for clashing with St. Pat's Sean O'Connor. In the melee that followed, St. Pat's winger Darren Meenan was also dismissed.
St. Pat's then had defender Kenny Browne sent off for a second booking in the 84th minute.
Derry City beat Bohemians 2-0 at the Brandywell to record a first win in four games.
Conor Murphy's first goal for the club set the Canystripes on their way on 28 minutes when the striker fired home from close range after Bohs' keeper Andy McNulty flapped at a corner.
Winger Stephen McLaguhlin's eighth goal of the season sealed the point for Derry on 86 minutes.
UCD beat Cork City 3-1 at the UCD Bowl to record successive wins for the first time this season and move off the foot of the table for the first time in almost three months.
Captain Mick Leahy headed home a Sean Russell corner to give College the perfect start after just eight minutes.
Keith Quinn, just on as a substitute, worked Cork's equaliser on 22 minutes, playing Keigan Parker through to score.
Another corner saw UCD restore their lead just past the half hour when Paul O'Conor's delivery is turned into his own net by midfielder Andy O'Connell.
Robbie Benson put UCD further ahead on 68 minutes, to all but seal the win for Martin Russell's side, after David McMillan's skill and surging run carved Cork open.