no. 517
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Black to play. This position is from the classic game Réti-Alekhine, Baden Baden 1925. What was Black’s next move? It does not win at once but it successfully fuels the flames of Black’s initiative. It also forms a thematic pendant to this week’s trio of three thunderous rook incursions. Can you find it? Answers to The Spectator by 7 August 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 … Ne5

Last week’s winner John Samson, Midlothian