Black to play. Vocaturo–Gokerkan, May 2021. After a long defence, White’s last move 101 Nf1-e3 was a decisive error. Which move did Black play to wrap up the game? Answers should be emailed to chess@spectator.co.uk by Monday 7 June. 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 g4! hxg4 2 h5! (or 1…gxh4 2 gxh5). Black’s king cannot stop both passed c and h pawns.

Last week’s winner John Payne, Cheadle Hulme, Cheshire