White to play and mate in 3. Composed by Sigmund Franz Josef Lehner, 1864. There are several ways to give mate in 4 moves, but it takes a delicate finesse to get the job done in 3. What is White’s first move? Answers should be emailed to chess@spectator.co.uk by Monday 13 June. 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 Bf4! wins the queen, since 1…gxf4 2 Rg8+ is mate next move

Last week’s winner James Obelkevich, London NW5