Ball D'Arc gave weight and a beating to some talented rivals in the Grade Three Poplar Square Chase at Naas.
Despite having to concede 9lb all round, Gordon Elliott's charge was the 6-4 favourite for this two-mile contest, with Jack Kennedy doing the steering.
American Tom jumped accurately at the head of affairs for much of the way, but having been off the track since falling here in January, he began to falter between the final two fences.
Turning out just seven days after finishing third at Down Royal, the Gigginstown House Stud-owned Ball D'Arc came home strongly to see off the ultra-consistent Ordinary World by five lengths, with American Tom third.
Elliott said: "Michael (O'Leary, owner) really gets the credit for this one as I wanted to give him an extra few days and go for the Clonmel Oil Chase. He said they had no runner in this and to let him take his chance.
"Michael is keen to support all these Graded races.
"It was a good performance giving them plenty of weight and he'd be better over two and a half (miles).
"He could go for the John Durkan (at Punchestown, December 10)."