White to play. This position is from Nakamura-Caruana, Leuven Blitz 2016. White can now win material. What is the key move? Answers to me at The Spectator by Tuesday 5 July 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 … Bxg2
Last week’s winner Malcolm Belt, Exmouth