Caravaggio came with a rattling run to maintain his unbeaten record in the Cold Move EBF Marble Hill Stakes at the Curragh.
The pace-setting Mister Trader held a good lead with a furlong to go but once Ryan Moore rousted the Aidan O'Brien-trained colt, Caravaggio set out his business in pleasing style.
The highly-regarded 4-7 favourite, who made a winning debut at Dundalk five weeks ago, asserted in the last half-furlong to win cosily by two and a quarter lengths.
Mister Trader was four and a quarter lengths clear of Ambiguity in third.
O'Brien said: "He's not a soft ground horse, so I'm very happy with that. That's his first run on grass and he will have learned a lot today. Ryan gave him a lovely ride.
"To break a minute up here on fast ground is very good so to do what he did today on soft ground (1m 02.22sec), getting close to heavy, is a serious time. It worked out lovely, he got a lead, which we were worried that he might not, and if you see when he changed (legs) he went halfway across the track. That's a real sign of greenness.
"We'll have to decide which race to go for at Royal Ascot (the Coventry or the Norfolk), but I think he will get six furlongs."
Moore said: "I'm very happy with him. He's a big baby of a horse, he's done it very smoothly and I'm he has a nice future. Aidan will get him back home, see how he is and take it from there."
Caravaggio is 3-1 from 8-1 for the Coventry Stakes with RaceBets and the same price for the Norfolk.
Devonshire claimed the biggest prize of her career to date when bagging Group Two honours in the Lanwades Stud Stakes at the Curragh.
The four-year-old, sporting the famous royal blue colours of Godolphin, narrowly missed out on her seasonal reappearance here in March but made no mistake this time, proving ideally placed as she stalked leader Queen Catrine before kicking clear inside the final two furlongs.
British raider Irish Rookie looked set to prove a big danger as she picked up well on the outside, but Devonshire (4-1), who was providing trainer Willie McCreery and jockey Billy Lee with a double on the day, always had plenty left in the tank and was two lengths to the good at the line.
McCreery said: "Billy counts for a lot on her as he knows her so well. He gave her a lovely ride and the bit of cover helped. We said that we wouldn't let it turn into a sprint.
"I think the weight of 9st 12lb beat her the last day. The 9st today was a big help, as she's not that big, but she's all heart.
"There are a few options in America which could suit her where she would only carry 8st 8lb."
Downforce (7-1) had maintained his steep upward curve when running out a comfortable winner of the BAM Handicap to give McCreery and Lee the first half of that double.
McCreery's recent Sligo scorer was dipping his toes in much deeper waters this time round but was always travelling sweetly in the hands of Lee and brushed aside Penny Pepper inside the final furlong, before pulling right away to record a three-and-a-half-length success.
Penny Pepper held on well for second having cut out the running down the centre of the track, with In Salutem coming home well for third.
McCreery said: "He's still immature but he has a grand way of going and he settled in well. He has plenty of pace for five furlongs, especially on that soft ground.
"He's in again at Gowran on Wednesday over seven furlongs. We'll see what yer man (handicapper) does, and also the man above with the ground. It's nice to get a winner on Guineas day."
Awtaad lands Irish 2,000 Guineas at the Curragh
Brave Anna came with a run on the outside to open her account in the opening Lester Piggott FBD Hotels & Resorts EBF Fillies Maiden.
Seamie Heffernan was happy to sit behind the two leaders, How and Lady Beware, before switching the O'Brien-trained filly to the outside to make her bid.
Brave Anna (9-2), showing the benefit of her debut run at Naas, asserted in the closing stages to win by a length from Lady Beware with her stablemate How, a sister of 1,000 Guineas favourite Minding, a neck away in third under Moore.
The race was delayed by 10 minutes after Pepperminty got loose before the start and was eventually withdrawn. Magical Fire was also taken out.
Velveteen, who had been the likely favourite, had been declared a non-runner earlier.
O'Brien said: "She came home well, and is a sister to Hit It A Bomb who got a mile well. She can certainly step up to seven furlongs now.
"Ryan's horse (How) was a bit keen in front and got a bit tired."
Repeater (14-1) brought 2,000 Guineas day to a close with victory in the valuable Hanlon Concrete Handicap.
Trainer Amanda Mooney, saddling her first winner, said: "He's had heaps of problems, ulcers and kissing spines. It's credit to vet Liam Sharp.
"He can improve again."
