Tell Us More looked booked for victory as Bryan Cooper kicked on with three to jump, with Ttebbob seemingly under pressure, but he crashed out at the penultimate fence, leaving Ttebbob in front and appearing a likely winner.

However, Walsh galvanised his mount on the run to the last and as Ttebbob floundered in the finish on testing ground, Sambremont poked his head in front on the line.

Walsh said: "You have to be a bit lucky sometimes. It looked like Tell Us More was going to win and when Bryan fell, my fella had half a chance.

"But he's nothing but tough, although it was slow-motion stuff. I landed running over the last while Ttebbob missed it a bit and that gave me the momentum.

"I think on good ground he would have been a long way behind, and when I saw him entered for this race I thought how can he run in that and now he's won over E25,000."

Ladbrokes go 10-1 from 14s about Sambremont in the National Hunt Chase at Cheltenham while Paddy Power and Boylesports go 12s.

Snow Falcon (11-4) emerged best of the three runners in the Ladbrokes Ireland Boyne Hurdle.

With Val De Ferbet and Prince Of Scars both taken out, just the Noel Meade-trained Snow Falcon and the Gigginstown-owned pair of Dedigout and Lieutenant Colonel went to post in the Grade Two heat.

Dedigout was sent off the 10-11 favourite despite having been off the track since last April and he was the first horse beaten, leaving Snow Falcon and Lieutenant Colonel to battle it out after the last.

Snow Falcon responded to Sean Flanagan's every urging though, pulling clear at the line.

Meade said: "Our biggest problem was that he was jumping so badly, and he was practically losing a length at all his hurdles. He's had a little back problem which has been causing him not to jump well.

"He was very sore for a while after he fell at Christmas. That's why you didn't see him for so long, but maybe that didn't do him any harm as he's better when he's a bit fresher. If he jumps as well as he jumped today, he can go anywhere.

"He'll take his chance in the World Hurdle now and go straight there. Hopefully he might jump a bit better. Three miles will be right up his alley. Monksland has more pace than him but this fella really stays.

"He's probably a horse that we could try on the Flat at some stage over a trip. He has an Aga Khan pedigree behind him, and is a horse that could win those staying races on the Flat."

Ladbrokes go 25-1 from 50s about Snow Falcon in the World Hurdle at Cheltenham.

While Walsh benefited from a final-fence blunder earlier on the card, the roles were reversed in the Ten Up Novice Chase as Black Hercules crashed out at the last leaving Measureofmydreams to triumph.

Black Hercules was sent off the 4-11 favourite for Walsh and Mullins after winning each of his two chase starts to date, beating Sambremont on the first occasion at this track in December.

Walsh maintained a prominent position throughout the three-mile heat and as the likes of Sub Lieutenant and Pleasant Company began to race in earnest, Black Hercules appeared to be travelling best of all.

Walsh pushed on on the run to the last and he looked like sailing clear only to crash through the fence, leaving stablemate Measureofmydreams in the driving seat.

Paul Townend only had to keep him going on the run to the line to win by five lengths from Noble Endeavour with Pleasant Company a further 18 lengths back in third.