Domesday Book© Photo Healy Racing
Domesday Book sprang a 40-1 surprise for trainer Stuart Edmunds and jockey Gina Andrews in Cheltenham's Fulke Walwyn Kim Muir Challenge Cup Amateur Riders' Handicap Chase.
It looked as though Pendra was going to defy top weight when he held a three-length advantage at the last, but the burden took its toll up the hill.
Domesday Book responded to the urgings of his rider to get up close home and deny Pendra. Premier Bond was third and Potters Legend fourth, as a clean sweep by Ireland of the races on day three was prevented.
Edmunds said: "It's unbelievable, it hasn't sunk in.
"I think it's as big a surprise to me as everyone else. He was recommended to me by a late friend who died a couple of weeks ago from Roger Brookhouse's.
"He ran OK at Leicester on his first run for me and we thought the further the better, so we put him in this and told Gina to be forceful on him and he just kept responding.
"I thought he was beat but she gave him a smack and he's always behind the bridle, the blinkers did their job.
"I came here thinking if he finished mid-div we'd do OK!"
Andrews said: "This has literally been my lifetime ambition, just to ride here never mind win.
"Stuart told me he'd never be on the bridle, but to be honest he was never off it until we turned in so that was a pleasant surprise.
"He rallied well, but I thought I'd be second jumping the last, the loose horse helped - I'm delighted!"
