White to play. This position is from Vallejo-Wynn, Bangkok 2016. White has sacrificed a rook and a bishop. He now has only one accurate move — a quiet move which generates an overwhelming attack. Can you see it? Answers by Tuesday 26 April 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 … Qxg2+

Last week’s winner Feliks Kwiatkowski, Haywards Heath, West Sussex