Connacht Derby second Corona Borealis again had to settle for the runner-up spot on his return to Sligo.
The son of Galileo was 6-5 for the Sligo Champion Supporting Sligo GAA Maiden and loomed up to challenge the front-running Ring Chief (5-2) on straightening up for home.
But the Jim Bolger-trained leader, making just his second appearance, showed resolution which belied his inexperience and he fought off the favourite by a length and a half.
Irish Mint (16-1) made a successful beginning to her handicap career in the Abbvie Supporting Sligo GAA Apprentice Handicap.
Patrick Prendergast's filly had beaten a total of just one opponent home in her three previous outings, but she knuckled down well and defeated Temasek Star by a length and a quarter, with Rathealy an unlucky third.
Invincible Diamond made it second-time lucky in the Irish Stallion Farms EBF Median Auction Maiden.
Annemarie O'Shea's colt offered encouragement when fourth on his Cork introduction and was sent off a 7-2 chance on the back of it.
He took the lead off Cathy's Pursuit approaching the turn for home and although he still looked a touch green in front, he had enough in reserve to hold Tagg's Island two and three-quarter lengths at bay.
The application of a hood worked the oracle for La Canaada in the Sligo GAA 19th August Race Day At Sligo Handicap (Div 1).
Connor King dictated terms to suit himself on the 16-1 shot and she accounted for Elusive Gent by two and a half lengths, while the second division went the way of another all-the-way winner in the shape of Blistering Dancer (5-1).
On paper, Tawseef (11-8) looked too good for the opposition in the Kilcawley Construction Sligo Maiden Hurdle and he was clear at the last, but he began to tread water in the dying strides and was ultimately all out to hold off Island Villa by a head.