Rock trailed 6-3 to two Killian Lett penalties in the 33rd and 47th minutes.

The game turned in the 58th minute when Blackrock hooker Peter Young struck a ball against the head and prop Gary Walsh, eventually, grounded the ball at the posts.

That was the killer blow.

The second and third tries, near the end, from centre Luke Fitzgerald and full back David Nyhan, were merely the decorations of an impressive performance.

Scorers:

Blackrock College: D Nyhan, L Fitzgerald, G Walsh try each; M Kavanagh 2 cons; C O’Daly pen.

King’s Hospital: K Lett 2 pens.

Blackrock College: D Nyhan; M Kavanagh, L Fitzgerald, J Power, V Artemiev; C O’Daly, D Madigan; G Walsh, P Young S Snell, M Cantrell, R O’Hara, D Laffan (capt), G Flanagan, D O’Reilly.

Replacements: S Creavin for Snell 22 mins; R Stokes for O’Daly 38 mins; C McGough for Cantrell, N Lysaght for Flanagan both 66 mins; N Murphy for Fitzgerald, S Kirwan for Artemiev both 69 mins; M Soden for Young 70 mins.

King’s Hospital: P Donovan; A Deegan, C Donohoe, N Hogan, R Molloy; K Lett, J Orr; G Moran, S Gray, C Telford, N Wilkinson, R Young, B Cunningham, G Carleton, S Young.

Replacements: T Stone for Telford 49 mins; P Musgrave for Carleton 54 mins; R Glynn for Hogan 64 mins; G Telford for Gray, G Coyle for Deegan both 70 mins.

Referee: T Deacon, Leinster Branch.

LEINSTER SCHOOLS JUNIOR CUP 1st Rd:

At Castle Avenue - Belvedere College 44 St Andrew's College 0.