White to play. Nunn-Gaprindashvili, ECU Senior Championship, Acqui Terme 2023. The former women’s world champion Gaprindashvili has just played 16…Nc6-a5. Which move did Nunn play to capitalise on this mistake? Answers should be emailed to chess@spectator.co.uk by Monday 12 June. There is a prize of £20 for the first correct answer out of a hat.

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