John Gosden's Beachfire continued his progression with a tight verdict over Right Step in the TurfTV Summer Vase Handicap at Goodwood.
The three-year-old has now won four of his five career starts, with jockey William Buick unbeaten on the son of Indian Haven.
Gosden's 9-1 shot had to be vigorously ridden along in the early stages due to a frantic early pace set by Aattash, but came with a withering run down the centre of the track.
Right Step tried to fight back but the winning margin was a head, with Invincible Soul back in third.
Buick said: "He doesn't make life easy for himself. He's just got his own way of doing things and he's the kind of horse you can't force.
"He does it the way he wants to do it and as long as he keeps winning that's good enough for me.
"I gave him a back-hander coming into the turn - I wanted him to do a bit more than what he was doing.
"He finished well and the step up to a mile and a quarter has helped him.
"He just seems to do enough, which is a good thing."
Gosden said: "The plan was to sweep late down the middle. I tried to change his style of running at home, but it doesn't suit him.
"When you go up in grade you can't keep spotting them 20 lengths.
"He runs like he wants to go further and he'll have to keep stepping up in grade."
A rueful Alan Jarvis was downcast after Right Step finished second. He said: "I've had five horses beaten a short distance over the last 10 days, and I don't know what we've got to do to get a winner.
"Harry Bentley who rode him is one of the most promising young jockeys around and gave him a great ride.
"We'll maybe look for something for him at York."
Richard Hannon said of the third home, Invincible Soul: "It was a very good run but Hughesie (Richard Hughes) was probably in front too soon.
"He stayed the mile and a quarter well and he'll go further."
Hannon claimed his 200th Goodwood winner through Kalahaag (9-2), who built on an encouraging Newbury debut in the EBF New Ham Maiden Fillies' Stakes.
"She didn't break too well at Newbury but was finishing really well," said Hannon.
"She's in some of the Million races, so we'll look at those."
George Baker and Citrus Star (8-1) wriggled through the gaps to take the Vintage At Goodwood Handicap.
"George is brillant at that," said trainer Chris Wall.
"The horse has been difficult in the stalls but he didn't put a foot wrong on the track.
"We'll have to see whether the handicapper gives us a chance, or whether we'll have to step up to Listed class."
There was a typically head-bobbing finish to the five-furlong RUK Leading Jockey Award Handicap and it was the Dandy Nicholls-trained Hamoody (14-1) who got up.
Hamoody is entered again on Friday and Nicholls said: "He'll run if he has eaten up.
"He'd lost his way a bit but has a great rapport with this place."
Liam Jones, who was unseated from Triple Aspect inside the final furlong of the Audi Stakes, was taken away for X-rays.