Tidal Bay got up in the final strides to land what looked an unlikely victory in a thrilling renewal of the Lexus Chase at Leopardstown.
Ruby Walsh got an amazing run out of the Paul Nicholls-trained gelding to pass several rivals on the run-in to give owner Graham Wylie a second Grade One on the card after Back In Focus took the Topaz Chase.
In a bunch finish, Tidal Bay (9-2) snatched the spoils from First Lieutenant, with Flemenstar and Sir Des Champs just behind.
The Neil Mulholland-trained Midnight Chase made the running with Hidden Cyclone and Quito De La Roque on his heels and Tidal Bay held up in the rear.
Hidden Cyclone went on during the final circuit while Flemenstar appeared to be going ominously well as Peter Casey's stable star tried to take his winning sequence to eight, on his first try at three miles. China Rock led two out, but Flemenstar was still going best and landed over the last with the race to win. However, his stamina appeared to give out on the soft ground on the run to the line.
Tidal Bay still had a few lengths to make up but he found what was necessary as Walsh produced him between horses, getting up to score by a head from First Lieutenant with Flemenstar third. Sir Des Champs was just behind but his chances of success were not helped by his jumping.
Nicholls said: "The extra two furlongs at Cheltenham will suit him well. He's in the form of his life for an 11-year-old. Roll on Cheltenham."
Wylie said: "This is up there with Inglis Drever. Back In Focus and now Tidal Bay. Both looked like they were beat over the last and both came with a great run in the end and just nicked it. I thought our fella was cooked four out, but then he started to come again. He's just got guts that horse. Paul has done an amazing job with him and Ruby as well. He gave him a great ride because you have to be patient."
Walsh said: "He jumped the second-last well and I got through the gap going to the last. He was really finishing and I thought I had a chance of getting to them. He was a bit flat-footed at the last and he took time to pick up, but when he did he started to fly and I guess 100 yards down I was thinking I was going to get there.
"Everyone was in the same boat. We all knew Flemenstar's stamina had to be tested and Midnight Chase went a good honest gallop and the tempo was upped all the way. It was a real true-run contest. He's a different horse this year. He won at Wetherby, was second in the Hennessy at Newbury and has come and won today. It's brilliant."
21 October 2014Panther given Breeders' go-ahead
Plain sailing for perfect Storm
Big Easy sets sail for Open fixture
Hall monitored for Giant Bolster
Stomachion in November frame
Hughes revels in 'sweet' success
Storm breezes to Exeter victory
BHA moves to address small fields
Moore concedes title to Hughes
Connell turns to Heskin
Integral to race on next year
Meade maps out gameplan for stars
Pele poised to tackle Hennessy
O'Neill sure of Taquin redemption
Heron seeking Great prize
Court to go on Trial
Saviour blow for Skelton
Dan makes chase debut
Moore waits on Grugy decision
O'Neill outlines That choices
Conn possible for Auction bid
Power team weigh up options
Bangor cancel schooling card
No rushing back for Long Run
Dynaste leads Old Roan contenders
Grands Crus retired
Exciting Berlais heads to Chepstow
Force handed Hong Kong mission
Park favourite for Trophy hunt
Al Kazeem team eye Hong Kong trip
Commemorative bound for Breeders'
Slade eyeing victorious swansong
20 October 2014Chelmsford City handed 58 fixtures
Alderwood to take two-mile test
Dynaste leads Old Roan contenders
Hennessy aim for Clouds
Fiesolana on Breeders' trail
High-class possibilities for Trophy
Chelmsford City handed 57 fixtures
French option for Maarek
Billy back for chasing bow
Judge to bid for Breeders' glory
Pipe mulls Moon target
High hopes for Holywell
Judge in Breeders' frame
Hill stars for Stoute and Moore
Gabriel lifts Garnet for Deegan
New One back with a win
Light career hangs in balance
Stars shines on hurdling debut
King big guns ready to start
Tullius camp consider options
Doyle unlikely to appeal Ascot ban
Mullins prepares formidable team
19 October 2014New One breezes to victory
Lavelle has Becher plan for Lodge
Riches heading on road north
Down Royal plan for Tiger
New makes Kempton return
Panther hunting Canadian prize
Sun takes a shine to Cork
Hobbs upholds Showcase record
Another gold strike for Bronze
Gallant Noble a true Champion
Head turns on Charm in QEII
Madame is Ascot leading lady
Forgotten rules for Weld
Byron is poetry in motion
18 October 2014Forgotten rules for Weld
War misses Breeders' date
Rakti reaps Caulfield reward
Chatez bids for Balmoral crown
Lavelle duo top Cheltenham card
Integral takes on the boys
Noble on Champion mission
Belardo a Dewhurst sparkler
Together stands firm for Ballydoyle
Ivawood felled by plucky Thought
Crowley doubles up on Berkshire
Tendon injury sidelines Tent