No. 697
White to play. Duda-Anton Guijarro, Charity Cup, March 2022. Black’s last move, 21…Qe7-b4 was an unforced error. Which move did White play to exploit it? Email answers to chess@spectator.co.uk by Monday 11 April. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow