no. 550
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Black to play. This position is a variation from Navara-Carlsen, Shamkir 2019. What is Black’s only winning move? Answers to me at The Spectator by Tuesday 23 April or via email to victoria@spectator.co.uk. 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 Rc8+

Last week’s winner Guy Herbert, London