For the third time in as many games, Cork Con out-half Jonny Holland was the star man as his inspired kicking display proved key in this heated derby at Temple Hill.
Aside from the eight points he contributed with the boot, he had a pivotal role in Con's opening try just 90 seconds into the contest.
Holland's smart grubber-kick to the corner was touched down by Niall O'Driscoll, and although the No 10 failed to land a difficult conversion, the home side had set their intentions out.
Holland then dispatched his first penalty with ease, making it 8-0 after nine minutes.
Dolphin did have an edge at the line-out, though, and when they stole a Con throw inside the '22', James Cronin was driven over.
Barry Keeshan added the extras, and Con's Brian Hayes was sent to the sin-bin on the verge of half-time, when it was 8-7.
With a man advantage, it took the visitors just a minute of the second period to move into the ascendancy, Keeshan driving home a penalty after Con were penalised in the scrum.
Con regained the lead after a wonderfully quick burst from Scott Deasy, who offloaded to Ivan Dinneen, whose pace took him over the line, and Holland's boot did the rest.
CORK CON -- D Lyons; R Clune, I Dinneen, S Deasy, N O'Driscoll; G Hurley, J Holland; P Galvin, A Cudmore (C Corkery 52), J Ryan; B Hayes, P Donnellan; G Lawlor, B O'Hara (B Cuttriss 52), J Ryan.
DOLPHIN -- E Mills; J Kiernan, C Bohane, D Barnes, G O Suilleabhain (R Scannell 68); B Keeshan, C Bannon (B Slater 61); J Cronin, N Scannell, C Condon; C Rowe, D O'Mahony; M Cronin (R O'Herlihy 56), R Murphy, B O'Callaghan.
Ref -- E Hogan-O'Connell.