Leinster Rugby held off Ulster Rugby to win 29‑21[1] in a United Rugby Championship Irish derby at Belfast’s Affidea Stadium[3].

The victory keeps Leinster in contention for a top‑four finish, a placement that secures a playoff berth as the season heads toward its climax, while Ulster’s late surge underscores the tight competition in the league’s Irish rivalry[1].

Leinster raced to a 29‑0 lead before halftime, the tally coming from four tries and three successful penalty kicks — a dominant display that set the tone for the match[2].

Ulster responded after the break with three unanswered tries, each adding five points and narrowing the gap to 29‑21, leaving the home side eight points short of a comeback[2].

Leinster coach Leo Cullen said his side emphasized a structured defensive effort that held firm in the closing minutes and prevented any further Ulster scoring[1].

The Irish derby remains a marquee matchup that draws passionate crowds to Affidea Stadium each season, highlighting the deep‑rooted rivalry between the province’s clubs and adding extra intensity to every encounter[1].

Both teams will look to build on the performance as the URC season moves into its decisive stages, with upcoming fixtures set to test their aspirations and shape the final playoff picture[1].

Leinster raced to a 29‑0 lead before halftime, the tally coming from four tries and three successful penalty kicks.

Leinster’s win preserves their bid for a URC playoff spot, while Ulster’s ability to claw back shows they remain a threat in the league’s tightly contested Irish rivalry.