The six-year-old victor, ridden by Noel Fehily, was cut to about 16-1 from 66-1 for the Cheltenham Gold Cup in March.
Alary, trained by Colin Tizzard, had been considered a Gold Cup hope but was pulled up before the third last fence.
Bristol De Mai sealed a Haydock double for Nigel Twiston-Davies after The New One became the first horse to win the Champion Hurdle Trial three times.
The nine-year-old, ridden by Sam Twiston-Davies for his trainer father, produced a gutsy display to edge past runner-up Clyne.
Unbeaten Neon Wolf ran out a nine-length victor of the novices' hurdle, while 2014 Champion Hurdle winner Jezki returned from a 632-day absence with a comfortable success at Navan.
Earlier, Ascot's Grade One meeting and Taunton's card on Saturday were called off because of frozen ground.
The Ascot fixture was due to feature the Clarence House Chase, which has been rescheduled to take place at Cheltenham on Festival Trials Day on 28 January.
Cheltenham will now have a nine-race card next week, with racing starting at midday.
Cornelius Lysaght, BBC horse racing correspondent
Abandoned Ascot was billed as the day's top fixture, but had it been on, it'd have struggled to compete for interest with Haydock in terms of the build-up to March's Cheltenham Festival.
The Nigel Twiston-Davies-trained pair The New One and Bristol De Mai showed off the fact they are players - not necessarily the biggest - but definitely players in whatever they go for at Cheltenham.
But the horse to really catch the eye was the Harry Fry-trained Neon Wolf who breezed home under jockey Noel Fehily (2-05) and will line-up in one of the Festival's big novice hurdles.

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Gotze, 24, made 83 Bundesliga appearances for Dortmund before joining Bayern Munich in 2013.
The size of the deal is unknown, although reports have suggested it is in the region of £20m.
"I have since his departure in 2013, always hoped that he will one day return to us," Dortmund CEO Hans-Joachim Watzke told the club website.
Gotze helped Bayern to three Bundesliga titles, as well as scoring Germany's winning goal at the 2014 World Cup.
His move to Bayern for a reported 37m euros (£31.5m) was the most expensive German transfer at the time.
Find all the latest football transfers on our dedicated page.

The militants targeted villages under government control, and clashed with the army and its militia allies.
The UK-based Syrian Observatory for Human Rights (SOHR) said at least 15 of the dead were civilians.
The fighting is near a strategically important highway linking Hama city with the Aleppo area further north.
The SOHR said at least 27 government troops or militia were killed in the attack, on the villages of Aqareb and al-Mabujeh. Another 10 bodies had yet to be identified.
Some of the civilians killed were put to death after being captured by IS, the observatory added.
State news agency Sana also reported the attack in Aqareb, saying 20 civilians were killed there, but made no mention of al-Mabujeh.
Why is there a war in Syria?
IS was now fully in control of Aqareb, SOHR said, adding that the government had sent reinforcements to the area.
Hama province is divided three ways between government forces, rebels and IS, with the militants mainly occupying the eastern part.

The 25-year-old, who finished last season on loan at Northampton, has agreed a three-year deal with the Reds.
Collins is Crawley's 12th signing of the summer transfer window.
"James wants a new challenge and he comes with a very good goalscoring record in League Two," Reds boss Dermot Drummy told the club website.
Collins, who has previously had spells at Aston Villa, Swindon and Hibernian, scored 15 goals in 49 appearances last season.
Find all the latest football transfers on our dedicated page.
Bristol De Mai romped home to win the Peter Marsh Chase at Haydock as the well-touted Alary disappointed.
[NEXT_CONCEPT]
Borussia Dortmund have re-signed forward Mario Gotze on a four-year deal, subject to a medical.
[NEXT_CONCEPT]
More than 50 people are reported to have been killed in heavy fighting in Syria after so-called Islamic State launched an attack in Hama province.
[NEXT_CONCEPT]
League Two side Crawley Town have signed James Collins after the striker's contract at Shrewsbury Town was cancelled by mutual consent.