Black to play. This is from Kantans-Malakhov, Latvian Railway Open, Riga 2014. Black has achieved a tremendous build-up on the kingside with pressure on the g-file and along the h1-a8 diagonal. How did he make the most of these? Answers by Tuesday 22 April via email to victoria@spectator.co.uk or by fax on 020 7681 3773. The winner will be the first correct answer out of a hat, and each week I shall be offering a prize of £20. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 Qe8+
Last week’s winner Graham Baker, Suffolk