Gleneagles showed a smart turn of foot to win at the Galileo European Breeders Fund Futurity Stakes Curragh, but remains a 25/1 chance with Sky Bet for the 2000 Guineas.
The winner of the Group Three Tyros Stakes at Leopardstown last time out, Joseph O'Brien's mount stepped to to score at Group Two level with the minimum of fuss.
Settled in third on the rail as Convergence cut out the running, O'Brien got a lovely split two from home and the response from the 8/13 favourite was taking as he shot through the gap.
The race was soon over, although Vert De Grece ran on well for the Joe Murphy stable to take second, three-quarters of a length back.
Winning trainer Aidan O'Brien said: "I'm delighted with that. He quickened up really well, but didn't do much in front. He had to move when the gap opened on the rail.
"He could possibly come back here for the National Stakes, but he has plenty of options. He has plenty of speed.
"He's a brother to Marvellous and a mile won't a problem. He's able to change gears. He quickened up there and went two or three lengths up easily, but then started to idle."
The winning rider said: "When he gets there he just has a look, it wasn't ideal getting there so soon but when I got a little split I had to go."
With Leading Light also striking, there were three Group-race winners on the card for Aidan O'Brien, although not perhaps with the horse they expected as Hall Of Mirrors recorded a surprise success in the Kilfrush Stud Royal Whip Stakes.
The outsider of the four runners and apparent second-string for the O'Brien team behind stablemate Kingsbarns, the Seamie Heffernan-ridden four-year-old made every post a winning one, eventually scoring under just hands and heels.
Joseph O'Brien loomed large on Kingsbarns two furlongs out and looked set to win his race when asked to quicken at the furlong pole, but Hall Of Mirrors (13/2) did not have to go for everything in order to score by a snug half a length.
Parish Hall, the well-backed 11/8 favourite, had every chance but his challenge proved to be short-lived and he was third.
O'Brien said: "That was always liable to happen as the other horse is fit. He has had runs and he ran a very good race at Ascot (fifth to Contributer in Wolferton Handicap).
"We knew he (Kingsbarns) would get tired today, but he had to run. He came there but got tired.
"The winner is a very good yardstick. He goes a nice pace and he doesn't lie down. He's a tough, hardy gelding.
"Kingsbarns is a horse that's had plenty of things and that's why we've minded him so much. We wanted to get him started and see.
"It doesn't always go according to the script!"