No. 831
From our UK edition
White to play. Composed by František Dedrle, Deutsches Wochenschach, 1921. Black plans to draw by eliminating the last pawn on b5. What is White’s only winning move? Email answers to chess@spectator.co.uk by Monday 6 January. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat. Please