White to play. This position is from Anna Muzychuk-Salem, Gibraltar Masters 2016.
How did White conjure up a decisive material gain? Answers to The Spectator by Tuesday 23 February or via email to victoria@spectator.co.uk or by fax on 020 7681 3773. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 e5+

Last week’s winner Kyle Richmond, Ballymena, County Antrim, Northern Ireland