Black to play. This is from Litsberger-Whiteley, Harrachov 1967. This position also emanated from the Dragon Variation. What was Black’s killing blow? Answers to me at The Spectator by Tuesday 22 July 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 shall be offering a prize of £20.

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