White to play. Grandelius-Aabling Thomsen, Xtracon Open 2018. White has just one winning move. What did he play? Answers should be emailed to chess@spectator.co.uk by Monday 1 May. 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 Bd5+. Depending on Black’s reply, it’s 2 Qc6# or 2 Qd2#.
Last week’s winner Richard Doble, Conwy, Wales
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