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White to play. This position is from So-Wojtaszek, Wijk aan Zee 2017. White has only one move to win. Can you see it? Answers to me at The Spectator by Tuesday 7 February or via email to 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 Re8

Last week’s winner Richard Burrow, Bollington, Cheshire