Rubi Light ran his rivals ragged to land the John Durkan Memorial Chase at Punchestown in impressive style.
Leading six fences from home, the Robbie Hennessy-trained six-year-old, ridden by Andrew Lynch, steadily built up a decisive lead and went on to score by five lengths without ever being threatened.
The 5-2 favourite beat market rival Joncol, who stayed on for second without getting close enough to throw down a challenge, while Cooldine was a remote third.
Kempes was always in arrears after making a mistake at the first fence before falling at the fifth-last, while last year's winner Tranquil Sea was pulled up before the final fence, where Roi Du Mee came down when well beaten.
Hennessy said: "That was good. Andrew got off him and said he would come on from that. He got a little bit tired. He was a sick horse, but has been working brilliantly the last two weeks. Obviously he loved the ground.
"Andrew wasn't making a mistake at the last. He gave him a kick and sent him on and he was foot-perfect. I imagine he'll come out of that all right. He looks all right.
"We'll look at the Lexus now. It's something to look forward to. That will tell us if we have a Gold Cup horse or a Ryanair horse.
"It would be great if we had a Gold Cup horse. He's only six, so he's going the right way. He's a nice horse to have and he's filling Sublimity's boots."
Victor Chandler cut Rubi Light to 12-1 from 16-1 for the Ryanair Chase at Cheltenham, while Joncol was left unchanged at 33-1 for the Gold Cup.