Black to play. This is from Caruana-Mamedyarov, Gashimov Memorial Play-off 2016. Black played 1 … Kg8 here, missing a clever winning move. What should he have played instead? (This is a tough puzzle.) Answers to me at The Spectator by Tuesday 28 June 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 Nxh7
Last week’s winner Jeremy Hart, Yatton, North Somerset