Black to play, Kateryna Lagno–Ju Wenjun, February 2020. Material is approximately balanced, but White’s king is in serious danger. What was Ju’s next move, which prompted immediate resignation? Answers should be sent to ‘Chess’ at The Spectator by Tuesday 25 February 2020 or via email to firstname.lastname@example.org. There is a prize of £20 for the first correct answer that is pulled out of a hat. Please include a postal address and allow six weeks for prize delivery.
Last week’s solution 1 Ra5! (idea 1...Nxa5 2 Rc8+). Black tried 1...Qg4+ but resigned after 2 Kf1 Nd8 3 Ra8