Ballyoisin jumped his rivals ragged to win the thetote.com Fortria Chase at Navan for the second successive season.
Enda Bolger's charge looked to face a tougher task than in 2018 with A Plus Tard, Duc Des Genievres and Hardline in against him but he took lengths out of his younger rivals over the early fences.
Last year's Racing Post Arkle winner Duc Des Genievres cried enough three out but for a stride or two going to the last A Plus Tard looked a big threat.
However Ballyoisin was again more fluent than his rival and had the necessary reserves to go on and score by two-and--three-quarter lengths.
"He's so quick - when he sees a fence he attacks it and goes and wings it. His best form is on good ground but he got away with it today. He's a fit horse in the race, a lot of the others were coming back for their first run," wining jockey Mark Walsh told Racing TV.
Bolger said: "That was nice. We thought we had fitness on our side, but I was just a bit scared that the ground might be a bit too heavy for him. He bossed it all the way, and his jumping again was his forte.
"I don't know where we're going to go next with him. We went on to Leopardstown last year, and it didn't work out. He may be just put away for the spring. We'll see what the boss and Frank (Berry, owner's racing manager) say.
"A place like here is up his alley, with the line of fences down the back. I thought Leopardstown would really suit him, with the good ground, but it didn't go his way last year.
"They are good horses in behind him there today, and he had 11st 10lb as well. It was a good performance all around."
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