White to play. This position is from Keres-Spassky, Gothenburg 1955. Can you spot White’s crushing blow? Answers to me at The Spectator by Tuesday 26 January 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 Rf6

Last week’s winner Graham Witty, Hull