Nine ties went ahead with two games postponed due to the death of Alan Dunn. Leinster and NCU both won four ties and lost two, while the NW had only one winner in their five games.
We start the round-up at Carrickfergus where YMCA's wait for a final appearance will have to wait another year after they were well beaten by the hosts.
Jacques Snyman (pictured) hit this third century, top scoring with 113 from just 89 balls (12 fours, 5 sixes) as he added 142 for the third wicket with Iain Parkhill (41).
Rory Anders took five wickets to peg them back but 246 was still a decent total to chase. Ashwin Chetty's new-ball burst had the visitors reeling as they slumped to 84 for 7, and from that position there was no way back- Carrick winning by 89 runs.
Five times winners North County also went by the wayside as they were beaten by a very strong CIYMS outfit.
Niall McGovern (73) and overseas player Yassar Cook (43) added 98 for the third wicket, but the innings lost its way, and a total of 211 was way below par.
John Matchett hit 14 fours and a six in his 95 from 92 balls, adding 137 with Obus Pienaar, who followed up his three wickets with an unbeaten 81 from 84 deliveries (8 fours, 4 sixes).
There were two centurions in the only NW success, as Bready chased down 293 to beat Lisburn by seven wickets with nine balls to spare.
Indian international Faiz Fazal hit 20 fours and 2 sixes in a brilliant 139, adding 1344 for the second wicket with Jonathan Waite (44). However his dismissal saw Bready rally and from 250 for 4, they held the visitors to 293.
Irish youth international Marcus Poskitt (54) dominated an opening stand of 71 which provided the perfect platform for Irosh Smarasooriya and David Rankin who put on 148.
Both players hit 11 fours, with Irosh clearing the ropes twice in his unbeaten 105 from 85 balls, while Rankin's 80 came from 79 deliveries. Ross Dougherty (26*) joined Irosh to close out the win as they added an unbroken 69.
Three wickets apiece for Matthew Foster and Graeme McCarter saw CSNI dismiss Coleraine for just 103, and Marc Ellison's 37 not out eased them to a seven wicket win.
Pembroke were also seven wicket winners, beating Brigade in a disappointingly one-sided contest. The Beechgrove side posted just 152, with only Jonny 'Bap' Robinson showing any resistance with a top score of 33 - Fiachra Tucker taking 3 for 27.
The modest total proved no problem for the Sydney Parade side as Theo Lawson (60*) and Lorcan Tucker (44) added 92 for the third wicket.
Another third wicket stand saw Ballspallen's Adam McDaid and Brendon Louw (pictured above) both make half centuries as they put on 114 to help the NW side to 220 at The Hills.
The two-times winners had little trouble chasing it down, with Mark Donegan (60), Daya Singh (54) and Joey Carroll (40) all in the runs.
The Ford brothers drove Malahide to victory against Muckamore as they put on a fourth wicket stand of 154.
Greg hit 16 fours and a six in an unbeaten 109 from 110 balls, while Matt's 62 not out came from 69 deliveries (4 fours, 1 six).
Earlier Fahad Iqbal (84) and David Miller (49) had been the main run scorers for Muckamore in their 209 - three wickets apiece for Matt Ford and James Newland.
Instonians are into the hat after an emphatic 10-wicket win at home to Cork County.
They looked to be facing a potentially tricky chase of 234 in 43 overs, but teenager Ollie Metcalfe's maiden senior hundred and a century from fellow opener Nikolai Smith made light of the chase in a club record partnership.
Metcalfe hit 15 fours and 2 sixes in his 123 from just 103 balls, while Smith hit 17 fours in his 106 from 104 balls - the stand of 236 coming in 34.3 overs.
Earlier Jeremy Benton and Ross Durity had both scored half centuries for the Munster side, while Shane Getkate's fine all-round season continued as he picked up four wickets.
Closest game of the day came at The Rectory, where Rush edged out the hosts by one wicket in a pulsating encounter.
Chasing 258, Rush looked to be cruising at 213 for 4, before a flurry of wickets saw them 244 for 9, still requiring 15.
Irish U19 skipper Neil Rock was the coolest man on the ground, and after getting the strike hurried his side to the win with two fours and six to finish unbeaten on 95 from 84 balls, hitting 10 fours and 5 sixes.
The postponed ties between North Down v Donemana and Phoenix v Eglinton will take place on Sunday June 2.
IRISH CUP SCORECARDS, REPORTS AND PHOTOS