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Black to play. This is from Nepomniachtchi-Anand, St Louis 2019. How did Anand exploit his opponent’s lapse? Answers to me at The Spectator by Tuesday 3 September 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 Bh3

Last week’s winner William Jolliffe, Oxford