Black to play. This is from Westman-Walther, Havana 1966. Black has the possibility of a discovered check against the white king. How can he make the most of this? Answers to me at The Spectator by Tuesday 2 June or via email to victoria@spectator.co.uk. The winner will be the first correct answer out of a hat, and each week I am offering a prize of £20. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 Re4

Last week’s winner Robert Tove, Cambridge, Massachusetts