Black to play. This is from Sursock–Larsen, Siegen 1970. How can Black win material? Answers to me at The Spectator by Tuesday 24 November 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 there is a prize of £20. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 Qxh7+

Last week’s winner William Sibree, Chart Sutton, Kent