Black to play. This is a variation from Caruana-Carlsen, World Championship (Game 10), London 2018. The black queen is trapped but Carlsen had planned an ingenious counter. What is it? Answers via email to victoria@spectator.co.uk by Monday 3 December (please note early closing date). 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 Re3
Last week’s winner Malcolm Burn, Tuffley, Gloucester

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