White to play. This is from Fischer-Benko, US Championship, New York 1963. The obvious 1 e5 is successfully parried by 1 … f5. What did Fischer do instead? Answers to me at The Spectator by Tuesday 19 January or via email to victoria@spectator.co.uk or by fax on 020 7681 3773. 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 … Rxg2+ and 1 … Bh2+

Last week’s winner Peter Skelly, Bedford