Hull started well but an early Stephen Johnson break from centre came to nothing as Alnwick intercepted and looked dangerous at the other end.
Hull were keen to play an open game and were using all their options but Alnwick tackled well and held Hull until the 18th minute.
After winning a lineout in their own ‘22’ Hull moved the ball wide and at pace. Good running by full-back Ben Winterton opened up space and centre Ali Heard was on hand to finish the move and race over 15 yards from the corner flag for Hull’s first try. Steve Johnson kicked a good conversion to see Hull lead 7-0.
Alnwick were under further pressure when Hull kicked off and an easy penalty three minutes later saw Hull increase their lead to 10-0.
The visitors were not overawed and their off-half Callum Burn converted a penalty after 28 minutes to get his side on the scorecard and trail by just seven points at the break.
Hull stormed into the second half but fine Alnwick defence meant that it took Hull’s scrummaging superiority to achieve a penalty try after Alnwicks prop Colin Philip’s was yellow carded on 54 minutes.
Hull then seemed to lose focus and Alnwick made the most of this lapse as their full back Colin Matalee took a quick tap penalty 25 yards out to sprint over unopposed for an unconverted try.
The home side made almost immediate amends as they kept their composure and took just three minutes to punch holes in Alnwick defensive mine to give winger Keane Naylor enough space to force his way over in the left hand corner for Hull’s
Hull were now in the driving seat and after 64 minutes another period of intense pressure was rounded off when second row stalwart Liam Regardsoe powered his over close to the posts for the fourth, and bonus point try for Hull. It was converted by Simon Humberston to see Hull easing away 29-8.
Alnwick were not yet finished and as the game entered its last five minutes they scored a consolation try through their flanker Ben Courty but Hull ran out deserved winners 29-13.