no. 436
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White to play. This is from Karjakin-Carlsen, World Championship, New York (Game 7) 2016. This position will be dead equal unless White plays a specific move which offers him a slight advantage. What move? Answers to me at The Spectator by Tuesday 29 November 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 Rxg6

Last week’s winner Bernhard von Stengel, London N4