Up to that time unbeaten in their 2006 fixtures, in early June they were drawn to meet Super League side Warrington, in the quarter final of the Challenge Cup. It was arguably their biggest fixture for some years. Against all the odds the Robins won, 40–36, their best result in the competition since their 1980 Challenge Cup win against local rivals Hull. This result also created a new club record of 18 consecutive wins. The victory set up a semi final tie against Super League leaders, St. Helens.