White to play. Adapted from an example in Capablanca’s classic manual Chess Fundamentals. Only one move leads to a win for White. Which? Email answers to chess@spectator.co.uk by Monday 17 June. 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 Rd6! Rd2 2 Qb1# or 1…Rxd4 2 Rxd4#. Lateral rook moves are met by 2 Bc3# or 2 Be3#.
Last week’s winner Mike Grant, Eastbourne, East Sussex

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