Kitten Rock ran out an impressive winner of the feature Fishery Lane Hurdle at Naas for the Edward O'Grady stable.
Ruby Walsh sat third for most of the way in the Grade Three contest as Analifet took them along in the testing conditions, and the odds-on favourite was clearly under pressure with two to jump as Kitten Rock loomed up with menace.
When the jockey gave the signal, the 7-2 chance eased clear to beat Henry Higgins by seven and a half lengths, with Analifet dropping right away at the finish.
O'Grady said: "He won quite well and I'm happy. We think he's nice, but I don't know where we will go now. It's very difficult with a four-year-old in their second season. I thought he would have to be good to win as, although he was well fit enough to run, there is loads of improvement in him and he gave a right good blow.
"Ruby was impressed with his jumping and down the line I see him as a Grade One chaser, hopefully, as he's just shy of 17 hands. How high he goes at this game I don't know, but I'm just delighted to have him."
Walsh added: "He's a super horse. He travelled well and he's a horse you would have to like. Where Mr O'Grady goes next, I don't know, but next year he will be a lovely chaser."
Walsh made it a double aboard the Eric McNamara-trained top-weight Sir Harry Cash (5-1) in the Thoroughbred County Novice Handicap Chase, creeping into contention before pulling out the stops to hold on.
The unbeaten Free Expression (11-10 favourite) looked impressive as he ran out a four-and-a-half-length winner of the www.naasracecourse.com Maiden Hurdle, but the stewards' attention was focussed on the unplaced Mount Corkish Girl.
They inquired into the running and riding of the Gillian Callaghan-trained mare, finding the handler and rider Andrew Lynch guilty of not running Mount Corkish Girl on her merits.
Callaghan was fined 1,000 euro, Lynch banned for seven days and the horse suspended from running for 60 days.
Classy hurdler Real Steel got the better of favourite Le Vent D'Antan in the Naas Annual Membership Beginners Chase for Mouse Morris, giving rider Bryan Cooper the first leg of a double. The six-year-old, previously trained by Philip Fenton, scored by four and a half lengths as the pair came clear.
Morris said: "He did it well. He jumped well and fiddled them well. He settled well also. He had done plenty of schooling. I think he'll make a nice three-miler."
Cooper then struck aboard the Willie Mullins-trained Killer Crow (3-1) in the Book Hospitality On Line Maiden Hurdle.
The Big Apple (5-2 joint favourite) impressed in running out a 12-length winner of the Go Racing In Kildare Membership 2015 (Pro/Am) Flat Race. Trained by Christy Roche and ridden by his son Padraig, the JP McManus-owned runner easily had the measure of Ma Garrett, with Tully East back in third.
However, Tully East was subsequently disqualified after rider Katie Walsh accidentally failed to weigh in, a mistake which cost her a five-day suspension.