YOUNG MUNSTER moved into second spot in the Division 1A table by virtue of a hard-earned 13-10 home victory over Dolphin at Clifford Park.
There was never much in it with Young Munster establishing a 6-3 interval lead. They then gave themselves some breathing space when Mark Doyle went over for a second-half try, but a late Dolphin try from Miah Cronin following an interception made for an exciting finish.
Brian Haugh, with a conversion and a penalty, and Mike Prendergast (drop goal) contributed the remainder of Young Munster's points.
Fourth-placed Cork Constitution saw their title chances disappear when losing 30-12 at home to St Mary's at Temple Hill. It was a fine performance from a St Mary's side determined to move clear of the relegation zone.
Clontarf remain in fifth after a 32-17 home bonus-point victory over bottom-of-the-table Shannon. Shannon managed three tries themselves, but they are now six points adrift at the bottom of the table after UL Bohemian defeated another of the struggling sides Old Belvedere 13-9 at Annacotty. A try from Ed Kelly was decisive.
The big result in Division 1B saw leaders Ballynahinch suffer their first defeat at the hands of UCD, who won the Ballymacarn Park encounter 19-7.
Second-placed Dublin University are now just four points behind Ballynahinch after a bonus-point 42-5 away win over bottom side Ballymena. Niji Adeolukan scored two of the students' six tries.