Tiutchev escaped the mayhem to clinch a spectacular victory in the Irish Independent Arkle Challenge Trophy.
The complexion of the race changed dramatically when Frozen Groom, travelling well in front, crashed at the third from home.
He brought down Commanche Court while Bellator, tracking the leaders at the time, was badly hampered.
Cenkos was left ahead after the fall but Tiutchev (8-1) took over at the second and forged away under Mick Fitzgerald to defeat Cenkos by eight lengths, shaving more than two seconds off the course record.
Decoupage, the 7-4 favourite, jumped stickily and was a further eight lengths away in third.
Tiutchev is trained by Nicky Henderson who won the corresponding event with Remittance Man (1991) and Travado (1993).
Henderson's head lad Corky Brown revealed that the horse was found cast in his box after exercise yesterday. "I had to stay up half the night in his box with him," he said.
Henderson said: "Winning races like this is something you never get tired of. He had a few problems earlier in the season and missed a run at Warwick but he's been very good at home.
"He's really galloped home here and Mick gave him a wonderful ride."
Tiutchev was quoted at 12-1 by Coral for next year's Queen Mother Champion Chase.
Henderson went on to complete a 62-1 double courtesy of a vintage ride from Fitzgerald on Marlborough in the William Hill National Hunt Handicap Chase.
Fitzgerald had the 11-2 chance in last place in the early stages of the race as 5-1 joint-favourite Beau set a good pace under Carl Llewellyn.
Beau's jumping had most of the field in trouble coming down the hill but Marlborough was making swift progress and came to challenge at the last.
A bold leap settled the race for Marlborough who stayed on stoutly to defeat Beau by two and a half lengths, with Star Traveller a further half length back in third.
'I have to say that was one of the most spectacular rides you will ever see,' said Henderson on greeting his 22nd Festival winner.
'It was some ride to come from last on that ground from that pace but that was how Mick has decided to ride him.
'Mick has always said that this was his race and he deserves to win a good prize after finishing second in the Racing Post Chase'.
Nigel Twiston-Davies was far from despondent at Beau's performance and the trainer said: 'If he'd flown the last it might have been different but he's jumped well apart from that and had them all at it.
'He won't go to Liverpool, I don't think the track will suit him, but he's in the Whitbread and the Scottish National.'
Rubhahunish landed his second big handicap of the season when producing a powerful finish to win the Ladbroke Casinos Final under Carl Llewellyn.
Nigel Twiston-Davies' charge, winner of the Tote Scoop6 Sandown Handicap Hurdle last time, was prominent among the chasing pack as Springfield Scally and Warner For Players set the early pace.
Llewellyn had to niggle the nine-year-old entire to keep his position going out onto the final circuit but was bang in contention as the leaders turned for home.
Take Five, carrying the second colours of JP McManus, jumped the last in front but Rubhahunish (8-1) was full of running and drew clear on the run-in to score by three-and-a-half lengths, with Font Romeu doing best of Martin Pipe's six runners in third and 4-1 favourite Darapour in fourth.
'He stays,' said the winning trainer. 'I thought the ground would be too fast today but the extra distance helped him.
'He was flat out with a circuit to go at Sandown and it was the same here and both times he ran on.
'We'll enter him at Aintree but I think the ground is likely to be too fast for him.'
