Bohemians moved back to the top of the table with a professional performance against cross city rivals St Pat's at a cold Dalymount Park.
The powerhouse Gypsies making it clear that they will do all that they can to push Rovers all the way as they strive to keep the trophy in Dublin 7.
Jason Byrne opened the scoring on 23 minutes with Ken Oman doubling the advantage on 34. Killian Brennan made sure of the points with a rocket on 50. Mark Quigley got on the scoresheet late on for the visitors.
Bohs took the lead after calamitous Pat's defending, as Byrne burst into the area and pounced on a poor ball back to goalkeeper Brendan Clarke from Bobby Ryan and then lobbed beautifully past the Pat's netminder.
Referee Declan Hanney initially looked to have ruled out the goal for offside but, with the through ball having come from a Pat's man, awarded it after consulting with his assistant Rhona Daly on the Jodi Stand side of the pitch.
Oman made it two on 34 minutes, nodding the ball in off the bar following a free from Paul Keegan, for his third goal against the Saints this term following his double in August.
Bohs continued to pile on the pressure and Clarke did well to save from a Glenn Cronin long-ranger on 36.
Pat's fans hoping that manager Pete Mahon's half-time talk would do the trick were left disappointed when Brennan fired in the third for the home side from 25 yards on 50 minutes.
Mahon then injected some life into his side, introducing Declan O'Brien and John Lester for Alan Cawley and Gary Dempsey, just before the hour mark. O'Brien was a European hotshot for Pat's in the summer, but he took a knock and lasted only ten minutes, to be replaced by Glen Fitzpatrick.
None of this lead to anything that Pat's fans could cheer about though Quigley did nip in for that consolation, but it was too little too late.