no. 536
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Black to play. This position is from Botvinnik-Smyslov, World Championship, Moscow (Game 18) 1958. How could Smyslov have forced instant resignation? Answers to me at The Spectator by Tuesday 15 January or via email to 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 ... Nxg3+

Last week’s winner Risdon Nicholls, Woodford Green, Essex