Munster gave their Celtic League chances a major boost with 29-21 victory over Newport at Musgrave Park, Cork.
Both sides needed a win to keep alive their hopes of qualification for the knock-out stages and a try either side of half-time for the Irish champions laid the foundations for their victory.
Outside half Paddy Wallace steered Ulster to an exciting 27-29 victory against Ebbw Vale in the Celtic League by kicking five penalties and two conversions for a personal tally of 19 points.
Vale ended the first half 20-3 in the lead but Ulster clicked into a much higher gear in the second half and thoroughly deserved their victory.
Connacht ended Neath's unbeaten Celtic League run with a disciplined and clinical 28-10 victory at the Galway Sports Ground.
Eric Elwood was the crucial performer for Connacht, converting two of the three touchdowns and landing three vital penalties.
Duncan Hodge jumped to Edinburgh's rescue at Myreside after the Caerphilly had threatened to pull off a shock success. The Scottish club eventually triumphed 27-20.
PA