Jonathan Moore cemented his position as new stable jockey for Rebecca Curtis when steering Irish Cavalier to a surprise success in the bet365 Charlie Hall Chase at Wetherby.
The seven-year-old had too many guns for talented and seasoned campaigners Menorah and odds-on favourite Cue Card to give the Irish rider a notable triumph in his first season in the UK.
Dynaste set the early pace from Virak and Wakanda with Cue Card never too far away.
Paddy Brennan sent Colin Tizzard's star performer into the lead a long way from home in a bid to repeat last year's success, but he could not shake off all his rivals.
Irish Cavalier (16-1) landed in front at the second-last fence and plugged on courageously to lift the Grade Two contest by three-quarters of a length from Menorah, with Cue Card, the 8-11 favourite, only third.