Westwood took Daryl Clark's pass to stretch over the line for his try after back-to-back penalties with Gidley's fourth conversion adding to Widnes' troubles.
Substitute Naqelevuki carried over two defenders for his try after the Chiefs had laced together several phases of possession but Mieres was off target with the extras.
Twice Kidwell charged over for tries after good work from Toa Kohe-Love and Towera Nikau respectively, to the ire of the home crowd, inflamed by his demonic grin in response.
If you have tests to study for, try reviewing after the actual work is done.
Ah Van started and finished off the move for Vikings' fifth try after the break, coming up with an intercept before powering over the line.
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Matt Banahan crossed for the bonus-point try after the break before Burgess was replaced on the hour mark.
McColl did go over in the corner for a second away try after a defence-splitting run by Purdy.
Thank you for getting up and trying again after a difficult night.
