Black to play. This position is from Scibior-Chiu, Varsity Match 2013. Black now powered through into the white position. What was the key move? Answers to me at The Spectator by Tuesday 8 March 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 … h2

Last week’s winner Mary Davis, Salthouse Haven, Hull