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. Please include a postal address and allow six weeks for prize delivery.
Last week’s solution 1…Rd1! 2 Qxd1 b2 and wins, or 2 Qxb3 Rd3+ or 2 Qb7 Rd2 with…b3 to follow.
Last week’s winner Philip Markham, Lansdown, Gloucestershire
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