Emmet Mullins' Corbetts Cross is bidding for an Cheltenham-Aintree double as he prepares to contest the William Hill Bowl Chase on the opening day of the Grand National meeting on Thursday.
The chestnut was a wide-margin winner at the Cheltenham Festival, taking the Maureen Mullins National Hunt Challenge Cup, named after his late grandmother, by 17 lengths under Derek O’Connor.
That run proved his stamina and his ability in heavy ground, and now his class will be tested as he steps down in trip from three miles and six furlongs to three miles and a furlong at Aintree.
Frank Berry, racing manager to owner JP McManus, said: "He’s probably in at the deep end, but he’s in good form, came out of Cheltenham very well and Emmet was keen enough to have a crack at it.
"The other horse is in the three-mile novice, Inothewayurthinkin, so we said we’d give Corbetts Cross a crack at this and see how we get on.
"He’s obviously coming back from Cheltenham where he had a hard enough race and he is in at the deep end, but as long as he runs well and gets round we’ll be happy."
Nicky Henderson’s Shishkin is the reigning champion in the race but has met with mixed fortunes this year, refusing to race in the 1965 Chase at Ascot and then falling with the race at his mercy in the King George VI Chase.
He bounced back to stroll to victory in the Denman Chase but his participation in the Gold Cup was prevented by an unsatisfactory scope ahead of the race during a difficult time for the Seven Barrows stable.
"Nico rode him on Saturday and said he felt fantastic, we’re ready to rock and roll I hope," Henderson told Unibet.
"We had to miss the Gold Cup but there was nothing else you could do, it just hasn’t been his year.
"The King George, you could argue whether he would or he wouldn’t have won – I’ve always felt that he would have won.
"Let’s hope he can put it all to rights, he certainly deserves it."

Gordon Elliott will saddle the Cheltenham Gold Cup runner-up Gerri Colombe in the race after he missed out by three and a half lengths when last seen in the Cotswolds in March.
The gelding has course and distance form as he was the winner of the Mildmay Novices’ Chase at the meeting last year with an easy seven-and-a-half-length success.
"I’m really happy with Gerri Colombe, he worked great on Monday morning," the trainer told At The Races.
"We were a bit disappointed with him after the Savills Chase, so we were delighted to see him come back to himself when running so well in the Gold Cup at the Cheltenham Festival.
"He seems to be improving all the time and can hopefully step up again. He handles soft ground very well, but he travelled great on nicer ground at Aintree last year, so I don’t think he’s one dimensional that way."
Paul Nicholls’ Bravemansgame also ran in the Cheltenham Gold Cup but did not run up to his mark when tailed off in fifth.
Nicholls felt the conditions did not suit him and will also experiment with cheekpieces as the bay looks to return to form in Liverpool.
"Things haven’t quite gone to plan for Bravemansgame this season," he said to Betfair.
"He hated the testing conditions at Cheltenham and it was clear from an early stage in the Gold Cup that he wasn’t handling them.
"The flat track at Aintree will suit him better and the ground shouldn’t be as deep as at Cheltenham.
"We are putting cheekpieces on Bravemansgame to help sharpen him up. It’s something we almost tried last time. His regular rider Scott Marshall was very pleased with the way he worked on Saturday morning."
Mouse Morris’ Gentlemansgame is another contender last seen in the Gold Cup, where he was pulled up two from home following a more fruitful start to the season that saw him finish second in the PWC Champion Chase and win the Charlie Hall.
Lucinda Russell’s Ahoy Senor was second behind Shishkin in the race last term and lines up in a bid to go one better after coming home in the middle of the pack in the Ryanair Chase at Cheltenham when last seen.
Olly Murphy’s Thunder Rock completes the field, winner of the Listed bet365 Premier Chase at Kelso in early March.

Dual Coral Cup winner Langer Dan takes a step into the unknown as he tackles Grade One company for the first time in the William Hill Aintree Hurdle.
The eight-year-old had struggled for form during the winter but trainer Dan Skelton reported the gelding had suffered from stomach ulcers over that period.
He was right back to his very best at Cheltenham, however, winning by three and a half lengths to become the first dual winner of the ultra-competitive handicap and he now faces top-level scorers Bob Olinger and Impaire Et Passe in a field of eight.
"He's up in class, running in a Grade One for the first time I think, which is very exciting," said Skelton.
"I’ve got a lot of respect for first two in the betting (Bob Olinger and Impaire Et Passe) and they’re not going to be easy horses to beat, but our horse is in great form and put up a career-best in the Coral Cup last time.
"I think think he’s a player anyway, but whether he can beat the two fancied ones or not we’ll see."
Henry de Bromhead’s Bob Olinger missed the Cheltenham Festival having finished second in the Irish Champion Hurdle as this has been his main target all season, over his ideal trip of two and a half miles.
"I’m really looking forward to riding Bob Olinger in the Aintree Hurdle," Rachael Blackmore told Betfair.
"He was really good in the Relkeel Hurdle at Cheltenham on New Year’s Day. It was great to feel the old Bob Olinger spark again this season. He really felt back to himself. When you have ridden a horse who has the ability that he has, it’s great when you get that feeling from him again.
"He ran very well then in the Irish Champion Hurdle at the Dublin Racing Festival at Leopardstown, he did well to keep on to finish second to the Champion Hurdler State Man.
"He’s in great form at home, and hopefully he can continue running like he has been running all season. We couldn’t be happier with him, we’re really looking forward to him."
Nicky Henderson’s Luccia ran a massive career-best to finish third in the Champion Hurdle when many of her stablemates were under a cloud, with her trainer eager to try a longer trip.
"The line of thought with stepping her up in trip is that we haven’t really got anywhere else to go other than Punchestown for the two-mile mares’ hurdle where you’d expect Lossiemouth to turn up," Henderson told Unibet.
"We were third in the Champion Hurdle so it would be interesting to find out where we compare with Lossiemouth to find out whether Lossiemouth would have been fourth or first in the Champion Hurdle.
"State Man didn’t exactly get a million miles away from Luccia which is probably the bit that chews us as we know where Luccia would sit with Constitution Hill and five lengths wouldn’t bring them together.
"I thought Lossiemouth was brilliant the twice we’ve seen her this season, so not only are we not keen on taking her on, I’ve been dying to step Luccia up in trip as this is an opportunity to see if she stays as it will make next year much easier."
Beacon Edge, Mahons Glory, Nemean Lion and Marie’s Rock complete the field.

Grey Dawning kicks off what could prove to be a crucial three days at Aintree for title-chasing Skelton in the the Close Brothers Manifesto Novices' Chase.
Following a fantastic four-timer at last month’s Cheltenham Festival, the Alcester handler heads former mentor Paul Nicholls by around £30,000 in the race to be crowned leading trainer, while perennial Irish champion Willie Mullins cannot be discounted despite being just over £685,000 further adrift.
Skelton is well aware the next three days on Merseyside are likely to have a major bearing on where the championship ultimately ends up, but he is doing his best to keep his feet on the ground.
"There’s a lot of water to go under that bridge, but having good chances at this meeting with the prize-money on offer there is obviously very important," he said.
Grey Dawning was one of Skelton’s fab four at Cheltenham, reversing previous form with the Nicholls-trained Ginny’s Destiny to secure Grade One honours in the Turners Novices’ Chase.
The pair will renew rivalry in the opening race of the Randox Grand National Festival, with Skelton hopeful Grey Dawning’s Cheltenham exploits have not left their mark.
He added: "I’m looking forward to it a lot, obviously. He showed at Cheltenham two-and-a-half (miles) in this ground is no issue at all. I wanted to go three miles with him, but when the ground was like this, it was a pretty easy decision to make.
"He’s in good form at home. I’ve no reason to think that he’s not in the same form as he was at Cheltenham, but historically horses have tried to do the two and some have and some haven’t, I just hope he’s in the have category! I have no reason to think he’s not, I’m very happy with him."
Nicholls is similarly positive about Ginny’s Destiny’s wellbeing and is looking forward to the rematch with Grey Dawning in a race worth £120,000 in total.
"He’s made giant strides since joining us this season, winning three times at Cheltenham before another cracking run when second to Grey Dawning at the Festival," Nicholls told Betfair.
"He will love the ground at Aintree and is in good shape.
"As with all of ours who ran at Cheltenham, no one can tell you for sure how they have come out of their races but they have had a nice, easy fortnight before we started tuning them up again. They did their last piece of work on Saturday and head to Aintree fresh and well."
Mullins also has a significant contender in the form of Il Etait Temps, who steps up in trip after placing third behind stablemate Gaelic Warrior in the Arkle at Cheltenham.
Jamie Snowden’s Turners Novices’ Chase sixth Colonel Harry and Tom Lacey’s Blow Your Wad, the only horse in the field not to run at the Festival, are the other hopefuls.