White to play. This position is from Vachier-Lagrave-Caruana, Norway Blitz 2015. How did White finish off at once? Answers to me at The Spectator by Tuesday 30 June or 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 am offering a prize of £20. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 … Bxa4

Last week’s winner Michael Lydon, Colwyn Bay, North Wales