Hisaabaat is 16-1 from 33s with Sky Bet for the JCB Triumph Hurdle after winning at Leopardstown.
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Dermot Weld's charge had been second on his previous three starts but was galvanised by first-time blinkers here.
Leading after jumping the final flight, Hisaabaat (15-2), ridden by Andrew Lynch, pulled away from the Gordon Elliott-trained Shadow Catcher, who had made a mess of that obstacle, to score by a length and a half with John Quinn's Countrywide Flame third.
Weld said: "He's been very consistent and got a lovely ride from Andrew. We won this race last year with Unaccompanied and the logical move would be to have a crack at the Triumph Hurdle with him.
"He's taken a little time to get his act together but he schooled well the other morning and got a lovely ride.
"He had to win today to be considered for (Cheltenham) and he has done it well."
Weld added: "Hisaabaat is Hisaabaat. When things go right for him, he's very good. He's getting the hang of things and the visor helped him to concentrate.
"He possibly would have won the Grade Three at Punchestown but for a mistake at the last, he's getting the hang of it now.
"Andrew said if he had another chance to ride him the last day here he would have waited with him for a lot longer and that's what he did today and it worked. That's why Andrew is riding so many Grade One winners!
"He will go straight to the Triumph Hurdle and you never know, he comes off a strong pace and he battles so it might just be the making of him."
Sky Bet also cut the runner-up to 16s from 25s for the Cheltenham showpiece but in contrast Ut De Sivola, who had beaten the winner at Punchestown last time, is out to 33s from 12s after failing to feature here.