Sanguineti–Najdorf, Mar del Plata 1956. White to move. White played 1 Kd8?, to threaten 2 Qe7#. Black resigned, overlooking 1…Rxg4 to prepare Ke6-f5. White should have chosen a queen check instead. Which one? Answers by Tuesday 21 January to ‘Chess’ at The Spectator or victoria@-spectator.co.uk. 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 Rxh7+! Kxh7 2 Qh5+ Kg8 3 Ne7 mate.
Last week’s winner Gareth Davies, Newport
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