No. 617
From our UK edition
Black to play. Efimov–Bronstein, Kiev 1941. Normally White seeks glory in the King’s Gambit, but here Bronstein scored a lightning victory for the Black side. Which move did he choose? Email answers to chess@spectator.co.uk by Monday 17 August. There is a prize of £20 for the first correct answer out of a hat. Please include