The Dot Love-trained 10-year-old pipped Willie Mullins’s Away We Go by half a length, with Home Farm third and Sweeney Tunes fourth.
“The going was a big help,” said jockey Ben Dalton. “I knew she’d stay right to the line. She winged the last and kept finding more.”
Love, the first woman to train an Irish National winner since 1997, said: “The ground didn’t suit at Cheltenham, but she really tried there. She’s a super mare.”
Meanwhile, Imperial Commander heads 49 declarations for Saturday’s Grand National.