White to play. Jansa-Wengholm, World Senior Championship 65+, 2023. With his next move, the Czech grandmaster Jansa struck a decisive blow on the kingside. What did he play? Answers should be emailed to chess@spectator.co.uk by Monday 21 November. There is a prize of £20 for the first correct answer out of a hat.
Luke McShane
No. 778

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