Todd's treble keeps the dream alive for Mossley
Mossley were the only Ulster side to advance in the Irish Senior Cup on Saturday as Instonians and Annadale both made their exits at the first hurdle.
Simon Todd's superb hat-trick steered the Newtownabbey side to a 4-1 win over Trinity and into the next round in which they will face Glenanne at home.
Instonians, meanwhile, fell to a 5-1 defeat against another top-flight team, Monkstown at Shaw's Bridge.
Inst coach Stephen Watt said: "Monkstown illustrated the difference between teams from the IHL and those below - they were ruthless in punishing our errors."
Rory Nichols smashed in the opener from a penalty corner for Monkstown in the 22nd minute.
Three minutes from the break, Monkstown were 2-0 to the good, Nichols getting his second with a carbon copy of his first after great work by Josh Filgas set up the award.
On the stroke of half-time, Gareth Watkins raced clear of the home defence and converted from the penalty spot after being fouled by Stuart McWilliams.
Stephen Kelso pulled one back from a Ross Kelly cross on 43 minutes but Monkstown again showed their ruthlessness to score twice in the last three minutes through efforts from Max Guilfoyle and Josh Filgas.
Inst will now have to regroup ahead of their quest to get back into Irish hockey's top-flight as they face Avoca in the second-tier IHL on Saturday in Dublin.
Annadale also made a first round exit, going down 3-0 to IHL rivals UCD in Dublin after the students scored all their goals in the second-half.
In the Irish Hockey Trophy, Bangor are through to the second round after goals from Patrick Mayne and Matthew Sanchez sealed a 2-0 home win over local rivals CI but North Down fell to a 3-1 defeat against Rathgar.
At domestic level, William Annett hit four of the goals as Kilkeel trounced Queen's University 9-0 in the Ulster Premier League.
Three Rock Rovers fell to a 4-2 defeat against Rot-Weiss Koln in the quarter-finals of Euro-Hockey Championship in Barcelona yesterday after an opening 5-0 win over Scottish team Grange.
Ulster's Chris Cargo was a member of the Hampstead & Westminster side that lost 2-1 to Mannheim at the same stage of the showpiece following the English champions' opening 2-1 win over HGC from the Netherlands.
Euro Hockey League: Saturday: Three Rock Rovers 5 Grange (Scotland) 0; Sunday: Three Rock Rovers 2 Rot-Weiss Koln 4.
Irish Senior Cup: Bandon 2 Railway Union 3; Cork Harlequins 2 Corinthian 1; Dublin University 1 Mossley 4 (S Todd 3, R Wilson); Instonians 1 (S Kelso) Monkstown 5; UCD 3 Annadale 0.
Irish Hockey Trophy: Bangor 2 (P Mayne, M Sanchez) CI 0; Rathgar 3 North Down 1 (R Davidson); Ballynahinch 0 Weston 3.
Ulster Premier League: Kilkeel 9 (W Annett 4, L Russell, A Graham, D Rae, M Henning) Queen's 0.
Linden Cup: Pool A: PSNI 6 Parkview 0; Saintfield 0 Portrush 5; Pool B: Down 2 Armagh 4.