Black to play. This position is from Kasparov-Kramnik, Dos Hermanas 1996. Kramnik played 1 ... Qh1+ and soon won. But he could have forced mate here. What is the key move? Answers to me at The Spectator by Tuesday 12 February or via email to email@example.com. 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 ... Rxc3+
Last week’s winner Jay Patel, London SW18