There was not much form to go on among the 13 runners meaning plenty of guesswork was needed but the fact that the two with previous experience, Finsceal Go Deo and Tanaiyla, were ultimately well beaten suggests the front three, who pulled nicely clear, all look above average.
Plenty of attention pre-race was on Michael O'Callaghan's Olivia Maralda as she cost 460,000 guineas and is owned in a partnership which includes Amo Racing and the footballer Philippe Coutinho.
She was sent off the 2-1 favourite, with Aidan O'Brien's Never Ending Story next best in the market at 3-1, and it was that pair who gave chase in vain to the Ger Lyons -trained 8-1 winner, who runs in the Juddmonte silks.
The Kodiac filly took two lengths out of her pursuers entering the final furlong and gave plenty for Colin Keane, holding on from the favourite by a neck.
"She's a lovely, honest filly but she hasn't come in her coat. I've been very patient with my fillies and it's great to start one here this weekend," said Lyons.
"There is so much improvement in her coat-wise and everything, and she'll be better on nicer ground.
"She had to do it the hard way which I don't like doing, but when Colin is riding them he has free rein to do what he wants.
"What she has learned from it we won't know because she had to do it all on her own, but she hit the line strong. I can see buckets of improvement because she is still very much a work in progress.
"I won't rush her back, she will tell me. The one thing Colin said is she rides weak so we will bear that in mind."
Lyons and Keane quickly doubled up when Pirate Jenny made a winning reappearance in the William Hill Acca Club Irish EBF Fillies Handicap.
Having just the third race of her life, the 5-2 favourite looked well handicapped on a mark of 88 and a step up in class now beckons.
"To be black-type hunting we thought she had to win this. We had a little hold up with her in the spring so she'll come on plenty for that. She got tired but still got the job done," said Lyons.
"These fillies we keep in training we're always looking for black type and she needs to improve again but we are on the right road."
Keane made it a treble on the afternoon aboard the Sarah Lynam-trained Additional in the Irish Stallion Farms EBF "Habitat" Handicap.
A 9-1 shot for this €50,000 contest, Additional was strongly pressed by Mickey The Steel inside the last of six furlongs but fought him off to prevail by a neck.
Lynam said: "I thought he might win the first day in Naas, but he probably needed it. He was very fresh and keen.
"He's a lovely horse but was just a bit buzzy and I thought if we could get a handle on him then he could win one of these.
"I'm delighted as it's the biggest race I've won and it's great for my uncle John (Lynam, owner) who has been very supportive."