White to play. Miles-Pritchett, Lloyds Bank Masters 1982. Tony Miles found a powerful counter to the queenside threats. What did he play? Email answers to chess@spectator.co.uk by Monday 4 July. 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 Ke6! Wins, e.g. 1…Nc6 2 Kf6 Nd8 3 h7+ Kh8 4 Ke7 Nc6+ 5 Kf8. The game went 1…Nd3 and after 2 Kf6 Kh8 3 h7! Black resigned, e.g. 3…Nf4 4 g7+ and Kf7.

Last week’s winner Nikunj Sinha, Dagenham, Essex