Black to play. This position is from Korchnoi–-Karpov, World Championship game 17, Baguio 1978. Can you spot Karpov’s dramatic finish? Answers to me at The Spectator by Tuesday 19 June 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 … b5+
Last week’s winner Jeff Aronson, Oxford
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