White to play. Vallejo Pons-Santos Latasa, Leon 2018. The choice is between 1 Ke6 and 1 Rh8+. White calmly played the wrong one and Black resigned immediately! But which move wins the game? Email answers to chess@spectator.co.uk by Monday 6 March. There is a prize of £20 for the first correct answer out of a hat.
Luke McShane
No. 741

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