No. 727

White to play. Basman-Balshan, Israel 1980. How did Basman decide the game in his favour? Answers should be emailed to chess@spectator.co.uk by Monday 7 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 Rg8! Rb1+ 2 Kh2 Rb2+ 3 Kh3 (White’s rook prevents g5-g4+) Rb1 4 b8=Q! Rh1+ 5 Qh2 and wins

Last week’s winner Sanket Ghatalia, London SE5